SJ 20763-1999 General specification for integral Stirling coolers

This specification specifies the general requirements, quality assurance regulations, test methods and delivery preparation for integral Stirling refrigerators (hereinafter referred to as refrigerators). This specification is applicable to the development and production of refrigerators. SJ 20763-1999 General Specification for Integral Stirling Refrigerator SJ20763-1999 Standard download decompression password: www.bzxz.net

Military Standard for Electronic Industry of the People's Republic of China FL5911
SJ20763—1999
General specification for integral Stirling cooler
cryocooler1999-11-10Published
1999-12-01Implementation
Approved by the Ministry of Information Industry of the People's Republic of China1 Specification
1.1 Title
1.2 Scope of application
1.3 Model specifications
2 Reference documents
3 Requirements
Detailed specifications
Qualification appraisal
3.3 Design, structure and materials
3.5 Dimensions
3.6 Weight
Performance characteristics
3.8 Environmental conditions
3.9 Reliability
3.10 Appearance quality
4 Quality assurance regulations
4.1 Pick up Inspection responsibilities
Inspection classification
Identification inspection
Quality consistency inspection
Inspection methods
4.6 Environmental test
4.7 Reliability…
Delivery preparation…
5.1 Packaging requirements
5.2 Storage requirements
5.3 Transportation requirements
6 Notes
6.1 Intended use
6.2 Contents of order documents
6.3 Definition
Appendix A Nomenclature method for Stirling cooler models (reference) iikAoNrkAca
General specification for integral Stirling coolers for military standards of the People’s Republic of China for the electronics industry
General specification for integral Stirling cryocooler1.1 Main content
Su 20763-1999
This specification specifies the general requirements, quality assurance regulations, test methods and delivery preparation for integral Stirling cryocoolers (hereinafter referred to as cryocoolers).
1.2 Applicable examples
This specification applies to the development and production of cryocoolers. t.3 Model specifications
1.3.1 Model
The model naming method of cryocoolers shall comply with the provisions of Appendix A (reference). 1.3.2 Specifications
At the specified refrigeration temperature, the recommended nominal cooling capacity specifications provided by the cryocooler are 100mW, 250mW, 550mW, 750mW, 1000mW, 1250mW, 1500mW, 1750mW, 2000mW, 2500mW, 3000mw and 5000mW.
2 Reference documents
GB191—90 Package, storage and transportation Tours mark
GJB150.3—86 Environmental test methods for military equipment High temperature test GJB150.4-86 Environmental test methods for military equipment Low temperature test GJB150.5—86 Environmental test methods for military equipment Temperature shock test GJB150.986 Environmental test methods for military equipment Wet heat test GJB150.11—86 Environmental test methods for military equipment Salt spray test GJB150.16-86 Environmental test methods for military equipment Vibration test GJB150.18—86 Environmental test methods for military equipment Impact test
GJB179A—96 Counting sampling inspection procedures and tables GJB899--90 Reliability Identification and acceptance test GJB2712--96 Quality assurance requirements for measuring equipment Metrological confirmation system SJ/T10320-92 Process document format
SJ/T10324-92 Completeness of process documents SJ/T10462--93 Commonly used graphic symbols for process management SJ/T10531--94 Changes to process documents
The Ministry of Information Industry of the People's Republic of China Issued from 1999-11~10 Implemented on 1999-12-01
3 Requirements
SJ20763-1999
3.1 Detailed specifications
Refrigerators shall comply with the provisions of this specification and detailed specifications. When the requirements of this specification conflict with those of detailed specifications, the detailed specifications shall prevail.
3.2 Qualification appraisal
Refrigerators submitted in accordance with this specification shall be products that have been qualified or approved for finalization. 3.3 Design, structure and materials
3.3.1 Design structure
The refrigerator adopts the working principle of Stirling refrigeration cycle. Its compression chamber and expansion chamber are connected to the same body. The cold head of the refrigerator provides the specified cooling capacity to the cooled object. 3.3.2 Materials
The requirements for materials and components used in refrigerators shall comply with the requirements of relevant standards or specifications; the requirements for materials and components without corresponding standards or specifications shall be specified in detailed specifications. 3.4 Process
3.4.1 The process documents of the refrigerator shall comply with the provisions of SJ/T10462, SJ/T10531, SJ/T10320 and SJ/T10324.
The process specification shall at least include the following: 3. 4. 2
Material specification:
Material processing;
Forming:
Intermediate testing;
Assembly;
Final performance testing:
Tools, equipment and instruments.
3.5 Dimensions
The dimensions of the refrigerator shall comply with the regulations (see 3.1). 3.6 Weight
The weight of the refrigerator shall comply with the regulations (see 3.1). 3.7 Performance characteristics
Unless otherwise specified, the refrigerator shall meet the following performance requirements under the conditions of an ambient temperature of 23±5°C and sufficient heat dissipation to ensure that the temperature rise of the compressor surface and the hot end surface of the expander is not higher than the ambient temperature of 15°C. 3.7.1 Cooling time
The test shall be carried out according to 4.5:3. The time for the refrigerator to reach the specified cooling temperature shall comply with the regulations (see 3.1). 3.7.2 Cooling capacity
Test according to 4.5.4. The cooling capacity of the refrigerator at the specified temperature shall comply with the regulations (see 3.1). 3.7.3 Input power
Test according to 4.5.5. The input power of the refrigerator shall comply with the regulations (see 3.1). 3.7.4 Noise
Test according to 4.5.6. The noise value of the refrigerator shall comply with the regulations (see 3.1). 2-
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3.7.5 Leakage rate
SJ20763--1999
Test according to 4.5.7. The leakage rate of the refrigerator shall not be greater than 1.33x10-*Pa-cm3/s3.7.6 Refrigeration temperature control
Test according to 4.5.8. The refrigerator shall be able to adjust the cold head temperature of the refrigerator within the specified range (see 3.1). 3.7.7 Cold head vibration amplitude (when applicable)
Perform the test in accordance with 4.5.9. The value of the cold head vibration amplitude of the refrigerator shall comply with the provisions (see 3.1). 3.7.8 Strengthening test (when applicable)
Perform the test in accordance with 4.5.10. The performance of the refrigerator shall meet the requirements of 3.7.1, 3.7.2 and 3.7.3. 3.8 Environmental conditions
Unless otherwise specified, the refrigerator shall be subjected to the following environmental tests. 3.8.1 High temperature operation
Perform the test in accordance with 4.7.1. The performance of the refrigerator shall meet the requirements of 3.7.1, 3.7.2 and 3.7.3. 3.8.2 High temperature storage
Perform the test in accordance with 4.7.2. The performance of the refrigerator shall meet the requirements of 3.7.1, 3.7.2 and 3.7.3. 3.8.3 Low-temperature operation
Test according to 4.7.3. The performance of the refrigerator shall meet the requirements of 3.7.1, 3.7.2 and 3.7.3. 3.8.4 Low-temperature storage
Test according to 4.7.4. The performance of the refrigerator shall meet the requirements of 3.7.1, 3.7.2 and 3.7.3. 3.8.5 Shock
Test according to 4.7.5. The performance of the refrigerator shall meet the requirements of 3.7.1, 3.7.2 and 3.7.3. 3.8.6 Heat (when applicable)
Test according to 4.7.6. The performance of the refrigerator shall meet the requirements of 3.7.1, 3.7.2 and 3.7.3. 3.8.7 Salt spray (when applicable)
Test according to 4.7.7. The performance of the refrigerator shall meet the requirements of 3.7.1, 3.7.2 and 3.7.3. 3.8.8 Vibration
Test according to 4.7.8. The performance of the refrigerator shall meet the requirements of 3.7. 3.8. 9 Shock
Test according to 4.7.9. The performance of the refrigerator shall meet the requirements of 3.7. 3.9. Reliability
The mean time between failures (MTBF) of the refrigerator shall comply with the provisions (see 3.1). 3.10 Appearance quality
The appearance quality of the refrigerator shall comply with the detailed specifications and the following provisions. 3.10.1 Metal surface
Visually inspect the metal surface of the refrigerator, which shall be free of burrs, cracks, scratches and sand. 3.10.2 Coated surface
The coating layer of the refrigerator shall be uniform, and the coated surface shall be free of peeling, blisters, scratches or cracks; the painted surface shall be smooth and free of defects, bubbling and peeling. 4 Quality assurance provisions
4.1 Inspection responsibility
SJ 20763--1999
Unless otherwise specified in the contract or order, the contractor shall be responsible for implementing all inspection requirements specified in this specification. Unless otherwise specified in the contract or order, the contractor may use any other equipment of its own that is suitable for completing the inspection requirements specified in this specification, except where the certification body does not allow it. When necessary, the ordering party or the certification body has the right to inspect any inspection item specified in this specification to ensure that the supply and service meet the specified requirements. 4.1.1 Conformity
All products must meet all the requirements of Chapter 3 and Chapter 5 of this specification. The inspection specified in this specification shall become an integral part of the contractor's entire inspection system or quality assurance program. If the contract includes inspection requirements not specified in this specification, the contractor shall also ensure that the products submitted for acceptance meet the contract requirements. Sampling for quality consistency inspection does not allow the submission of products that are known to be defective, nor can the ordering party be required to accept defective products. 4.1.2 Test equipment and inspection devices
The contractor shall establish and maintain test equipment, measuring equipment and inspection devices with sufficient accuracy and quantity to carry out the required inspections. At the same time, the contractor shall establish and maintain a metrological calibration system in accordance with GJB2712 to control the accuracy of the measuring and test equipment.
4.2 Inspection classification
Refrigerator inspection is divided into:
a. Identification inspection (see 4.3):
b. Quality consistency inspection (see 4.4). 4.2.1 Production batch
A production batch shall consist of refrigerators manufactured under the same conditions using the same design, process, materials and equipment.
4.2.2 Inspection batch
The contractor shall submit all refrigerators for quality consistency inspection within the specified time to determine whether they meet the requirements of the detailed specifications and this specification.
An inspection batch may consist of one production batch or several production batches manufactured under essentially the same conditions (materials, processes, equipment, etc.). 4.2.3 Resubmitted batch
The resubmitted batch shall be separated from the newly submitted batch and can be clearly identified as a resubmitted batch. When any batch submitted for quality consistency inspection fails to meet any of the requirements of Group A and Group C inspection, a stricter inspection may be adopted to resubmit the unqualified batch.
4.3 Qualification Inspection
Qualification inspection shall be conducted in a laboratory permitted by the superior qualifier. The sample unit shall be a refrigerator produced using equipment and quality assurance procedures that are in normal operation in production. Qualification inspection consists of inspection and testing.
4.3.1 Inspection
All materials, parts, processes and components shall comply with the requirements of the relevant specifications and be inspected according to the requirements of Table 1: Sampling shall be carried out using the general inspection level I in GJB179A. The AQL for mechanical inspection shall be 2.5; the AQL for visual inspection shall be 4. - 4-
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Inspection items
Design structure
Defects and damages of components
Overall dimensions
Appearance quality
4.3.2 Inspection
SJ 20763—1999
Table 1 Inspection
Requirements Chapter No.
After passing the inspection in accordance with 4.3.1, select 3 refrigerators for inspection in accordance with Table 2. Failure to meet any of the inspection items shall become a reason for refusing to grant the sub-identification approval. Identification test
Overflow time
Refrigeration capacity
Input power
Leakage rate
Refrigeration temperature control
Cold head vibration amplitude (when applicable2
Strengthening test (when appropriate)
High source operation
High temperature storage
Low temperature operation
Low overflow storage
Degree shock
Mixed heat (when applicable)
Salt spray (when applicable)
Handiness
4.3.3 Maintenance of qualification for identification
Requirement Chapter No.
Method Chapter No.
In order to maintain the qualification for identification, the contractor shall submit a report to the identification agency every 12 months. The identification agency shall stipulate Starting report date. The report shall include a summary of the test results of Group A and Group C inspections, and shall at least state the number of batches that have passed the inspection and the number of batches that have failed: the number and type of any part failures; the test items completed in a year; the test results of all repair batches shall be identified and stated. Failure to submit a report within 30 days before the end of each 12-month cycle may result in loss of product certification qualification. In addition to periodic submission of inspection qualifications, at any time within the 12 cycles, if the inspection data shows that the signed qualified products cannot meet the requirements of this specification, the contractor shall immediately notify the certification agency. -5-
SJ20763--1999
If no production is carried out within the reporting period, a report shall be submitted to prove that the contractor still has The capabilities and equipment necessary to produce this product. If production has not taken place within two consecutive reporting cycles, the certification body may, based on its decision, require the contractor to provide the product for inspection in accordance with the certification inspection requirements and explain the reasons for non-production. 4.4 Quality consistency inspection
Quality consistency inspection shall be conducted according to Group A and Group C (see Table 3 and Table 4). Group A is a batch inspection, and Group C is a periodic inspection
4.4.1 Will not meet the requirements of Group A or Group C. The contractor shall analyze the reasons for non-conformity, take corrective measures, and resubmit in accordance with the provisions of 4.2.3. If not submitted or resubmitted unqualified, the batch shall be rejected. In the event of a Group C failure, samples from subsequent batches of refrigerators represented by a failed Group C inspection shall be subjected to the mountain test batch by batch. All tests in the invalid group C shall be carried out until three consecutive batches have passed the invalid group C test, and then the test can be restored to the periodic test. 4.4.2 Inspection
4.4.2.1 Group A inspection
Group A inspection shall be carried out after passing the inspection in 4.3.1. It consists of the items listed in Table 3. The test sequence can be arbitrary. Group A is 100% inspected and unqualified products are rejected. Inspection item Date
Falling time
Refrigerating capacity
Input power
Leakage rate
Refrigeration temperature control
Cold head vibration amplitude (when applicable)
Strengthening test (when applicable)
Table 3 Group A inspection
Requirement Article number
Method Article number
4. 4.2.2 Group C inspection
Group C inspection shall be sampled from the batches that have passed Group A inspection. The batch sampling shall be in accordance with the provisions of 4.4.2.3 and the inspection cycle shall be 12 months. Group C inspection shall be carried out according to the items and sequence specified in Table 4. 6
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Inspection items
High temperature working
High temperature storage
Low temperature working
Low temperature storage
Temperature shock
Humidity and heat (when applicable)
Salt spray (when applicable)
4.4.2.3 Inspection sampling
SJ 20763—1999
Table 4 Group C inspection
Requirements Article number
Method Article number
Sampling procedure
See 4.4.2.3
Samples shall be randomly selected from each inspection batch in accordance with the provisions of Table 5. If one or more unqualified samples are found, the entire batch shall be rejected.
Table 5 Sampling plan for Group C
100~299
300499
500～999
Above 1000
4.4.2.4 Sample handling for Group C
Samples inspected by Group C shall not be delivered as genuine products. 4.5 Inspection method
4.5.1 Test conditions
Number of samples
Unless otherwise specified, all measurements and tests shall be carried out under the following atmospheric conditions: Concentration: 23±5°C;
Relative humidity: 20%～80%;
Air pressure: test site air pressure.
4.5.2 Appearance and mechanical inspection
Use visual inspection and measuring instruments or weighing instruments that meet the accuracy requirements according to 3.3, 3.4, 3.5, 3.6, 3.10.
4.5.3 Cooling time
4.5.3.1 Test equipment
The test equipment consists of four parts: test dewar (vacuum cover), heat load, power supply and measuring instrument, vacuum acquisition equipment and test instrument.
4.5.3.1.1 The heat load consists of the following components: copper block:
b, source temperature sensor:
c. Heater.
4.5.3.1.2 The heat load should have the following characteristics: SJ 20763--1999
a. The temperature sensor and heater are installed on the copper block: b. When the heat load is cooled from 300K to 80K (or 77K) or other temperatures, it should be able to release the specified heat energy: c. The heater in the heat load should be able to provide the specified heating power: d. Fix the heat load on the cold head to ensure good thermal contact without damaging the cold head. 4.5.3.2 Test procedure
4.5.3.2.1 Installation method
a. The temperature sensor and resistor are installed on the copper block: b. Fix the heat load on the cold head to ensure that it has good thermal contact with the cold head C. Connect the test dewar, vacuum acquisition equipment and test instruments. 4. 5. 3. 2. 2 Test
Test according to the following details:
a. Start the refrigerator and use the temperature sensor to measure the temperature of the heat load installed on the cold head; b. Use a timer to measure the time for the cold head to drop from room temperature to the specified cooling temperature, which should meet the requirements of 3.7.1. 4.5.4 Cooling capacity
4.5.4.1 Test equipment
It should meet the requirements of 4.5.3.1.
4. 5.4. 2 Test procedure
4.5.4.2.1 Installation method
Should meet the requirements of 4.5.3.2.1.
4. 5. 4. 2. 2 Test
Test according to the following details:
a. Start the refrigerator and measure the cold head temperature with a temperature sensor; b. When the temperature no longer drops, input heating power to the heat load; c. After the cold head temperature stabilizes at the specified cooling temperature for 20 minutes, measure the heating power of the heat load, which should meet the requirements of 3.7.2.
4.5.5 Input power
4.5.5.1 Test equipment
Should meet the requirements of 4.5.3.1.
4.5.5.2 Test procedure
4.5.5.2.1 Installation method
Should meet the requirements of 4.5.3.2.1. Www.bzxZ.net
4.5.5.2.2 Test
Start the refrigerator and measure the input power of the refrigerator under the conditions of specified cooling temperature and cooling capacity. It should meet the requirements of 3.7.3.
4.5.6 Noise
4.5.6.1 Test
Test according to the following rules:
a. Under the conditions of specified cooling temperature and cooling capacity, the refrigerator should be set to work in an environment where the background noise is 10dB lower than the noise level of the measured noise:
SJ 20763-1999
6. Orient the refrigerator at 4 positions 90° apart in the same plane, and use a sound level meter to measure the sound pressure at a distance of 1.5m from the refrigerator. It should meet the requirements of 3.7.4. 4.5.7 Leakage rate
4.5.7.1 Test
Place the refrigerator in a sealed vacuum container and connect it to a hydrogen detector to measure the leakage rate. It should meet the requirements of 3.7.5. 4.5.8 Refrigeration temperature control
4.5.8.1 Test
Change the working state and operating parameters of the refrigerator, and test the refrigeration capacity of the refrigerator according to 4.5.4. It shall meet the requirements of 3.7.6.
4.5.9 Cold head vibration amplitude
4. 5. 9. 1 Test
Under normal working conditions of the refrigerator, use precision instruments to measure the vibration amplitude of the cold head in the axial and radial directions. It shall meet the requirements of 3.7.7.
4.5.10 Strengthening test
The refrigerator shall be subjected to a 12h strengthening test as shown in Figure 1. It shall meet the requirements of 3.7.8. 60°℃
+23℃ 2 h
4.6 Environmental test
Unless otherwise specified, the environmental test shall be carried out in accordance with the following provisions. 4.6.1 High temperature operation
Test according to GJB150.3, and the specific requirements shall comply with the detailed specifications. 4.6.2 High temperature storage
Test according to G.B150.3, and the specific requirements shall comply with the detailed specifications. 4.6.3 Low temperature operation
Test according to GJB150.4, and the specific requirements shall comply with the detailed specifications. 4.6.4 Low temperature storage
Test according to GJB150.4, and the specific requirements shall comply with the detailed specifications. 4.6.5 Temperature shock
Test according to GJB150.S, and the specific requirements shall comply with the detailed specifications. 4.6.6 Damp heat
Test according to GJB150.9, and the specific requirements shall comply with the detailed specifications. 4.6.7 Salt spray
Test according to GJB[50.11, and the specific requirements shall comply with the detailed specifications. 9-
4. 6. Excitation vibration
SJ 20763--1999
The test shall be carried out in accordance with the provisions of GJB150.16, and the specific requirements shall comply with the detailed specifications. 4. 6.9 Impact
The test shall be carried out in accordance with the provisions of GJB150.18, and the specific requirements shall comply with the detailed specifications. 4.7 Reliability
The test shall be carried out in accordance with the provisions of GJB899, and the specific requirements shall comply with the detailed specifications. 5 Delivery preparation
5.1 Packaging requirements
The refrigerator shall have a special packaging box with shockproof protection. The box shall contain the product manual and certificate of conformity. The certificate of conformity shall indicate:
Manufacturing unit:
b. Product model;
c. Detailed specification number:
d: Production and inspection date;
e. Inspector's seal:
t. Others.
5.2 Storage requirements
The refrigerator should be stored in a dry, ventilated warehouse with a temperature of -10 to 40°C and a relative humidity of no more than 80%, free from the influence of corrosive gases.
5.3 Transportation requirements
The refrigerator should be transported in a secure packaging box. The outside of the box should comply with the provisions of Article 5.1 and should have graphic labels such as "Handle with care" and "Avoid moisture" in accordance with the provisions of GB191; the packaging box containing the refrigerator should be transported in the prescribed manner, and should avoid direct exposure to rain and snow and mechanical collision during transportation. 6 Explanations
6.1 Intended use
The refrigerator that meets this specification is mainly used in conjunction with military infrared detectors. 6.2 Contents of order documents
The order documents shall indicate the following:
a. Name, number and date of this specification: b. Name, number, date and model of applicable detailed specifications Identification of protection, packaging and packing requirements and applicable markings: c.
d. Others.
6.3 Definitions
6.3.tRefrigeration temperaturerefrigerationtemperatureIn a given working system, the indicated temperature of the cold end of the refrigerator when the refrigerator is working, in Kelvin (K). 6.3.2Refrigeration capacityrefrigerationcapacityThe heat power absorbed by the refrigerator load at the specified refrigeration temperature, in Watts (mW). 6.3.3Cooling down time cooling down time 10
TKANrKAca-2 Test
Test according to the following rules:
a. Start the refrigerator and use the temperature sensor to measure the temperature of the heat load installed on the cold head; b. Use a timer to measure the time for the cold head to drop from room temperature to the specified cooling temperature, which should meet the requirements of 3.7.1. 4.5.4 Cooling capacity
4.5.4.1 Test equipment
Should meet the requirements of 4.5.3.1.
4. 5.4. 2 Test procedure
4.5.4.2.1 Installation method
Should meet the requirements of 4.5.3.2.1.
4. 5. 4. 2. 2 Test
Test according to the following rules:
a. Start the refrigerator and use the temperature sensor to measure the temperature of the cold head; b. When the temperature stops dropping, input heating power to the heat load; c. After the cold head temperature stabilizes at the specified cooling temperature for 20 minutes, measure the heating power of the heat load, which shall meet the requirements of 3.7.2.
4.5.5 Input power
4.5.5.1 Test equipment
Shall meet the requirements of 4.5.3.1.
4.5.5.2 Test procedure
4.5.5.2.1 Installation method
Shall meet the requirements of 4.5.3.2.1.
4.5.5.2.2 Test
Start the refrigerator and measure the input power of the refrigerator under the conditions of specified cooling temperature and cooling capacity, which shall meet the requirements of 3.7.3.
4.5.6 Noise
4.5.6.1 Test
Test according to the following rules:
a. Under the conditions of specified cooling temperature and cooling capacity, the refrigerator should be set to work in an environment where the background noise is 10dB lower than the noise level of the measured noise:
SJ 20763-1999
6. Orient the refrigerator at 4 positions 90° apart in the same plane, and use a sound level meter to measure the sound pressure at a distance of 1.5m from the refrigerator. It should meet the requirements of 3.7.4. 4.5.7 Leakage rate
4.5.7.1 Test
Place the refrigerator in a sealed vacuum container and connect it to a hydrogen detector to measure the leakage rate. It should meet the requirements of 3.7.5. 4.5.8 Refrigeration temperature control
4.5.8.1 Test
Change the working state and operating parameters of the refrigerator, and test the refrigeration capacity of the refrigerator according to 4.5.4. It shall meet the requirements of 3.7.6.
4.5.9 Cold head vibration amplitude
4. 5. 9. 1 Test
Under normal working conditions of the refrigerator, use precision instruments to measure the vibration amplitude of the cold head in the axial and radial directions. It shall meet the requirements of 3.7.7.
4.5.10 Strengthening test
The refrigerator shall be subjected to a 12h strengthening test as shown in Figure 1. It shall meet the requirements of 3.7.8. 60°℃
+23℃ 2 h
4.6 Environmental test
Unless otherwise specified, the environmental test shall be carried out in accordance with the following provisions. 4.6.1 High temperature operation
Test according to GJB150.3, and the specific requirements shall comply with the detailed specifications. 4.6.2 High temperature storage
Test according to G.B150.3, and the specific requirements shall comply with the detailed specifications. 4.6.3 Low temperature operation
Test according to GJB150.4, and the specific requirements shall comply with the detailed specifications. 4.6.4 Low temperature storage
Test according to GJB150.4, and the specific requirements shall comply with the detailed specifications. 4.6.5 Temperature shock
Test according to GJB150.S, and the specific requirements shall comply with the detailed specifications. 4.6.6 Damp heat
Test according to GJB150.9, and the specific requirements shall comply with the detailed specifications. 4.6.7 Salt spray
Test according to GJB[50.11, and the specific requirements shall comply with the detailed specifications. 9-
4. 6. Excitation vibration
SJ 20763--1999
The test shall be carried out in accordance with the provisions of GJB150.16, and the specific requirements shall comply with the detailed specifications. 4. 6.9 Impact
The test shall be carried out in accordance with the provisions of GJB150.18, and the specific requirements shall comply with the detailed specifications. 4.7 Reliability
The test shall be carried out in accordance with the provisions of GJB899, and the specific requirements shall comply with the detailed specifications. 5 Delivery preparation
5.1 Packaging requirements
The refrigerator shall have a special packaging box with shockproof protection. The box shall contain the product manual and certificate of conformity. The certificate of conformity shall indicate:
Manufacturing unit:
b. Product model;
c. Detailed specification number:
d: Production and inspection date;
e. Inspector's seal:
t. Others.
5.2 Storage requirements
The refrigerator should be stored in a dry, ventilated warehouse with a temperature of -10 to 40°C and a relative humidity of no more than 80%, free from the influence of corrosive gases.
5.3 Transportation requirements
The refrigerator should be transported in a secure packaging box. The outside of the box should comply with the provisions of Article 5.1 and should have graphic labels such as "Handle with care" and "Avoid moisture" in accordance with the provisions of GB191; the packaging box containing the refrigerator should be transported in the prescribed manner, and should avoid direct exposure to rain and snow and mechanical collision during transportation. 6 Explanations
6.1 Intended use
The refrigerator that meets this specification is mainly used in conjunction with military infrared detectors. 6.2 Contents of order documents
The order documents shall indicate the following:
a. Name, number and date of this specification: b. Name, number, date and model of applicable detailed specifications Identification of protection, packaging and packing requirements and applicable markings: c.
d. Others.
6.3 Definitions
6.3.tRefrigeration temperaturerefrigerationtemperatureIn a given working system, the indicated temperature of the cold end of the refrigerator when the refrigerator is working, in Kelvin (K). 6.3.2Refrigeration capacityrefrigerationcapacityThe heat power absorbed by the refrigerator load at the specified refrigeration temperature, in Watts (mW). 6.3.3Cooling down time cooling down time 10
TKANrKAca-2 Test
Test according to the following rules:
a. Start the refrigerator and use the temperature sensor to measure the temperature of the heat load installed on the cold head; b. Use a timer to measure the time for the cold head to drop from room temperature to the specified cooling temperature, which should meet the requirements of 3.7.1. 4.5.4 Cooling capacity
4.5.4.1 Test equipment
Should meet the requirements of 4.5.3.1.
4. 5.4. 2 Test procedure
4.5.4.2.1 Installation method
Should meet the requirements of 4.5.3.2.1.
4. 5. 4. 2. 2 Test
Test according to the following rules:
a. Start the refrigerator and use the temperature sensor to measure the temperature of the cold head; b. When the temperature stops dropping, input heating power to the heat load; c. After the cold head temperature stabilizes at the specified cooling temperature for 20 minutes, measure the heating power of the heat load, which shall meet the requirements of 3.7.2.
4.5.5 Input power
4.5.5.1 Test equipment
Shall meet the requirements of 4.5.3.1.
4.5.5.2 Test procedure
4.5.5.2.1 Installation method
Shall meet the requirements of 4.5.3.2.1.
4.5.5.2.2 Test
Start the refrigerator and measure the input power of the refrigerator under the conditions of specified cooling temperature and cooling capacity, which shall meet the requirements of 3.7.3.
4.5.6 Noise
4.5.6.1 Test
Test according to the following rules:
a. Under the conditions of specified cooling temperature and cooling capacity, the refrigerator should be set to work in an environment where the background noise is 10dB lower than the noise level of the measured noise:
SJ 20763-1999
6. Orient the refrigerator at 4 positions 90° apart in the same plane, and use a sound level meter to measure the sound pressure at a distance of 1.5m from the refrigerator. It should meet the requirements of 3.7.4. 4.5.7 Leakage rate
4.5.7.1 Test
Place the refrigerator in a sealed vacuum container and connect it to a hydrogen detector to measure the leakage rate. It should meet the requirements of 3.7.5. 4.5.8 Refrigeration temperature control
4.5.8.1 Test
Change the working state and operating parameters of the refrigerator, and test the refrigeration capacity of the refrigerator according to 4.5.4. It shall meet the requirements of 3.7.6.
4.5.9 Cold head vibration amplitude
4. 5. 9. 1 Test
Under normal working conditions of the refrigerator, use precision instruments to measure the vibration amplitude of the cold head in the axial and radial directions. It shall meet the requirements of 3.7.7.
4.5.10 Strengthening test
The refrigerator shall be subjected to a 12h strengthening test as shown in Figure 1. It shall meet the requirements of 3.7.8. 60°℃
+23℃ 2 h
4.6 Environmental test
Unless otherwise specified, the environmental test shall be carried out in accordance with the following provisions. 4.6.1 High temperature operation
Test according to GJB150.3, and the specific requirements shall comply with the detailed specifications. 4.6.2 High temperature storage
Test according to G.B150.3, and the specific requirements shall comply with the detailed specifications. 4.6.3 Low temperature operation
Test according to GJB150.4, and the specific requirements shall comply with the detailed specifications. 4.6.4 Low temperature storage
Test according to GJB150.4, and the specific requirements shall comply with the detailed specifications. 4.6.5 Temperature shock
Test according to GJB150.S, and the specific requirements shall comply with the detailed specifications. 4.6.6 Damp heat
Test according to GJB150.9, and the specific requirements shall comply with the detailed specifications. 4.6.7 Salt spray
Test according to GJB[50.11, and the specific requirements shall comply with the detailed specifications. 9-
4. 6. Excitation vibration
SJ 20763--1999
The test shall be carried out in accordance with the provisions of GJB150.16, and the specific requirements shall comply with the detailed specifications. 4. 6.9 Impact
The test shall be carried out in accordance with the provisions of GJB150.18, and the specific requirements shall comply with the detailed specifications. 4.7 Reliability
The test shall be carried out in accordance with the provisions of GJB899, and the specific requirements shall comply with the detailed specifications. 5 Delivery preparation
5.1 Packaging requirements
The refrigerator shall have a special packaging box with shockproof protection. The box shall contain the product manual and certificate of conformity. The certificate of conformity shall indicate:
Manufacturing unit:
b. Product model;
c. Detailed specification number:
d: Production and inspection date;
e. Inspector's seal:
t. Others.
5.2 Storage requirements
The refrigerator should be stored in a dry, ventilated warehouse with a temperature of -10 to 40°C and a relative humidity of no more than 80%, free from the influence of corrosive gases.
5.3 Transportation requirements
The refrigerator should be transported in a secure packaging box. The outside of the box should comply with the provisions of Article 5.1 and should have graphic labels such as "Handle with care" and "Avoid moisture" in accordance with the provisions of GB191; the packaging box containing the refrigerator should be transported in the prescribed manner, and should avoid direct exposure to rain and snow and mechanical collision during transportation. 6 Explanations
6.1 Intended use
The refrigerator that meets this specification is mainly used in conjunction with military infrared detectors. 6.2 Contents of order documents
The order documents shall indicate the following:
a. Name, number and date of this specification: b. Name, number, date and model of applicable detailed specifications Identification of protection, packaging and packing requirements and applicable markings: c.
d. Others.
6.3 Definitions
6.3.tRefrigeration temperaturerefrigerationtemperatureIn a given working system, the indicated temperature of the cold end of the refrigerator when the refrigerator is working, in Kelvin (K). 6.3.2Refrigeration capacityrefrigerationcapacityThe heat power absorbed by the refrigerator load at the specified refrigeration temperature, in Watts (mW). 6.3.3Cooling down time cooling down time 10
TKANrKAca-4 The cooling capacity of the refrigerator shall be tested and shall meet the requirements of 3.7.6.
4.5.9 Vibration amplitude of cold head
4. 5. 9. 1 Test
Under normal working conditions of the refrigerator, the vibration amplitude of the cold head in the axial and radial directions shall be measured with precision instruments and shall meet the requirements of 3.7.7.
4.5.10 Strengthening test
The refrigerator shall be subjected to a 12h strengthening test as shown in Figure 1 and shall meet the requirements of 3.7.8. 60°℃
+23℃ 2 h
4.6 Environmental test
Unless otherwise specified, environmental tests shall be carried out in accordance with the following provisions. 4. 6.1 High temperature operation
The test shall be carried out in accordance with the provisions of GJB150.3. The specific requirements shall comply with the detailed specifications. 4.6.2 High temperature storage
The test shall be carried out in accordance with G.B150.3. The specific requirements shall comply with the detailed specifications. 4.6.3 Low temperature operation
The test shall be carried out in accordance with GJB150.4. The specific requirements shall comply with the detailed specifications. 4.6.4 Low temperature storage
The test shall be carried out in accordance with GJB150.4. The specific requirements shall comply with the detailed specifications. 4.6.5 Temperature shock
The test shall be carried out in accordance with GJB150.S. The specific requirements shall comply with the detailed specifications. 4.6.6 Humidity
The test shall be carried out in accordance with GJB150.9. The specific requirements shall comply with the detailed specifications. 4.6.7 Salt spray
The test shall be carried out in accordance with GJB[50.11. The specific requirements shall comply with the detailed specifications. 9-
4. 6. Excitation vibration
SJ 20763--1999
The test shall be carried out in accordance with the provisions of GJB150.16, and the specific requirements shall comply with the detailed specifications. 4. 6.9 Impact
The test shall be carried out in accordance with the provisions of GJB150.18, and the specific requirements shall comply with the detailed specifications. 4.7 Reliability
The test shall be carried out in accordance with the provisions of GJB899, and the specific requirements shall comply with the detailed specifications. 5 Delivery preparation
5.1 Packaging requirements
The refrigerator shall have a special packaging box with shockproof protection. The box shall contain the product manual and certificate of conformity. The certificate of conformity shall indicate:
Manufacturing unit:
b. Product model;
c. Detailed specification number:
d: Production and inspection date;
e. Inspector's seal:
t. Others.
5.2 Storage requirements
The refrigerator should be stored in a dry, ventilated warehouse with a temperature of -10 to 40°C and a relative humidity of no more than 80%, free from the influence of corrosive gases.
5.3 Transportation requirements
The refrigerator should be transported in a secure packaging box. The outside of the box should comply with the provisions of Article 5.1 and should have graphic labels such as "Handle with care" and "Avoid moisture" in accordance with the provisions of GB191; the packaging box containing the refrigerator should be transported in the prescribed manner, and should avoid direct exposure to rain and snow and mechanical collision during transportation. 6 Explanations
6.1 Intended use
The refrigerator that meets this specification is mainly used in conjunction with military infrared detectors. 6.2 Contents of order documents
The order documents shall indicate the following:
a. Name, number and date of this specification: b. Name, number, date and model of applicable detailed specifications Identification of protection, packaging and packing requirements and applicable markings: c.
d. Others.
6.3 Definitions
6.3.tRefrigeration temperaturerefrigerationtemperatureIn a given working system, the indicated temperature of the cold end of the refrigerator when the refrigerator is working, in Kelvin (K). 6.3.2Refrigeration capacityrefrigerationcapacityThe heat power absorbed by the refrigerator load at the specified refrigeration temperature, in Watts (mW). 6.3.3Cooling down time cooling down time 10
TKANrKAca-4 The cooling capacity of the refrigerator shall be tested and shall meet the requirements of 3.7.6.
4.5.9 Vibration amplitude of cold head
4. 5. 9. 1 Test
Under normal working conditions of the refrigerator, the vibration amplitude of the cold head in the axial and radial directions shall be measured with precision instruments and shall meet the requirements of 3.7.7.
4.5.10 Strengthening test
The refrigerator shall be subjected to a 12h strengthening test as shown in Figure 1 and shall meet the requirements of 3.7.8. 60°℃
+23℃ 2 h
4.6 Environmental test
Unless otherwise specified, environmental tests shall be carried out in accordance with the following provisions. 4. 6.1 High temperature operation
The test shall be carried out in accordance with the provisions of GJB150.3. The specific requirements shall comply with the detailed specifications. 4.6.2 High temperature storage
The test shall be carried out in accordance with G.B150.3. The specific requirements shall comply with the detailed specifications. 4.6.3 Low temperature operation
The test shall be carried out in accordance with GJB150.4. The specific requirements shall comply with the detailed specifications. 4.6.4 Low temperature storage
The test shall be carried out in accordance with GJB150.4. The specific requirements shall comply with the detailed specifications. 4.6.5 Temperature shock
The test shall be carried out in accordance with GJB150.S. The specific requirements shall comply with the detailed specifications. 4.6.6 Humidity
The test shall be carried out in accordance with GJB150.9. The specific requirements shall comply with the detailed specifications. 4.6.7 Salt spray
The test shall be carried out in accordance with GJB[50.11. The specific requirements shall comply with the detailed specifications. 9-
4. 6. Excitation vibration
SJ 20763--1999
The test shall be carried out in accordance with the provisions of GJB150.16, and the specific requirements shall comply with the detailed specifications. 4. 6.9 Impact
The test shall be carried out in accordance with the provisions of GJB150.18, and the specific requirements shall comply with the detailed specifications. 4.7 Reliability
The test shall be carried out in accordance with the provisions of GJB899, and the specific requirements shall comply with the detailed specifications. 5 Delivery preparation
5.1 Packaging requirements
The refrigerator shall have a special packaging box with shockproof protection. The box shall contain the product manual and certificate of conformity. The certificate of conformity shall indicate:
Manufacturing unit:
b. Product model;
c. Detailed specification number:
d: Production and inspection date;
e. Inspector's seal:
t. Others.
5.2 Storage requirements
The refrigerator should be stored in a dry, ventilated warehouse with a temperature of -10 to 40°C and a relative humidity of no more than 80%, free from the influence of corrosive gases.
5.3 Transportation requirements
The refrigerator should be transported in a secure packaging box. The outside of the box should comply with the provisions of Article 5.1 and should have graphic labels such as "Handle with care" and "Avoid moisture" in accordance with the provisions of GB191; the packaging box containing the refrigerator should be transported in the prescribed manner, and should avoid direct exposure to rain and snow and mechanical collision during transportation. 6 Explanations
6.1 Intended use
The refrigerator that meets this specification is mainly used in conjunction with military infrared detectors. 6.2 Contents of order documents
The order documents shall indicate the following:
a. Name, number and date of this specification: b. Name, number, date and model of applicable detailed specifications Identification of protection, packaging and packing requirements and applicable markings: c.
d. Others.
6.3 Definitions
6.3.tRefrigeration temperaturerefrigerationtemperatureIn a given working system, the indicated temperature of the cold end of the refrigerator when the refrigerator is working, in Kelvin (K). 6.3.2Refrigeration capacityrefrigerationcapacityThe heat power absorbed by the refrigerator load at the specified refrigeration temperature, in Watts (mW). 6.3.3Cooling down time cooling down time 10
TKANrKAca-
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