JB/T 10302-2001 Dual-purpose solenoid valve for small refrigeration systems for household and similar purposes
Some standard content:
/ICS29.260.99
Machinery Industry Standard of the People's Republic of China
JB/T10302—2001
Small Refrigeration System for Household and Similar Use
Two-way Solenoid Valve
2-way Solenoid Valve used in Small Refrigerating System for Household and Similar Use
Published on August 30, 2001
China Machinery Industry Federation
Implementation on February 1, 2002
JB/T10302-2001
This standard is formulated based on the basic principles of two-way solenoid valves for small refrigeration systems for household and similar use, the technical data, production practice and enterprise standards of solenoid valves, with reference to the industry standards of some domestic solenoid valves for similar uses and the sample data of similar products of some foreign manufacturers as well as the needs of users.
This standard specifies the basic requirements, test methods and inspection rules for the environment, safety and performance of two-way solenoid valves for small refrigeration systems for household and similar purposes, and represents the overall technical level of this type of product. This standard is the basic requirement that domestic manufacturers should meet when designing and producing this type of product. Enterprises can formulate more detailed enterprise standards based on this standard according to their own actual situation. In order to ensure that the design, manufacture and use of products meet the necessary safety requirements, this standard is used in conjunction with GB14536.1-1998 Household and Similar Electric Automatic Controllers Part 1: General Requirements. This standard is proposed and managed by the National Technical Committee for Standardization of Household Automatic Controllers. The drafting units of this standard are: Zhejiang Sanhua Group Co., Ltd., Guangdong Midea Group Co., Ltd., and Jiangsu Changheng Group Co., Ltd. The main drafters of this standard are: Wang Qinyao, Jin Ronglu, Yang Yuda, and Guo Yongfu. This standard is entrusted to the National Technical Committee for Standardization of Household Automatic Controllers for interpretation. 1 Scope
Machinery Industry Standard of the People's Republic of China
Small Refrigeration System for Household and Similar Use
Two-way Solenoid Valve
2-way Solenoid Valve used in Small Refrigerating System for Household and Similar Use
JB/T10302-2001
This standard specifies the definition, classification, requirements, test methods, inspection rules, marking, instruction manual, packaging, transportation and storage of two-way solenoid valves used in small refrigerating systems for household and similar use (hereinafter referred to as solenoid valves). This standard applies to solenoid valves used in small refrigerating systems for household and similar use with AC not exceeding 440V, 50Hz or 60Hz and refrigerants such as R12, R22, R134a, R502, R410a, R407c, etc. This standard does not apply to solenoid valves with two-way circulation. 2 Referenced Standards
The provisions contained in the following standards become the provisions of this standard through reference in this standard. When the standard is published, the versions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2423.17-1993 Basic environmental test procedures for electrical and electronic products Test Ka: Salt spray test method GB/T2828-1987 Count sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches) GB/T2829-1987 Count sampling procedures and sampling tables for periodic inspection (applicable to inspection of production process stability) GB14536.1-1998 Household and similar electric automatic controllers Part 1: General requirements JB/T4119--1991 Refrigeration solenoid valves
3 Definitions
In addition to the relevant definitions in GB14536.1 applicable to this standard, this standard adopts the following definitions. 3.1 Maximum operating pressure differential Max.operatingpressuredifferential The maximum pressure difference between the inlet and outlet of the valve when the solenoid valve is reliably operated. 3.2 Airtight
The ability of the solenoid valve to prevent the refrigerant from leaking out of the refrigeration system when it is working. 3.3 Minimum operating pressure differentialMin, operating pressure differentialThe minimum pressure difference between the inlet and outlet of the valve when the solenoid valve can operate reliably. 3.4 Flow ratef1ow
The volume of the test medium passing through the open position of the solenoid valve per unit time. 3.5 Internal leakageinternalleakageApproved by China Machinery Industry Federation on August 30, 2001, implemented on February 1, 2002
JB/T10302-2001
The size of the internal leakage when the test medium passes through the closed position of the solenoid valve. 4 Classification
4.1 Classification
4.1.1 Classification by refrigerant
Refrigerant
4.1.2 Classification by the state of the solenoid valve
a) Normally closed solenoid valve, its code can be omitted: Classification by refrigerant
b) Normally open solenoid valve, its code is represented by the Chinese phonetic letter K. 4.2 Specifications
The specifications of the solenoid valve should give priority to the basic parameters specified in Table 2. R410a
Table 2 Basic parameters
Min. port diameter
4.3 Model
Example:
Outer diameter of pipe
Series product code, expressed in Arabic numerals Refrigerant classification code
Solenoid valve status classification code
Valve port diameter: expressed in Arabic numerals, mm Basic code of solenoid valve
Model DF2KB2 indicates that the solenoid valve is suitable for a valve port diameter of 2mm, normally open, and uses R410a as refrigerant, and the manufacturer has improved the design and manufacture for the second time.
5 Requirements
5.1 General requirements
5.1.1 Power supply: AC does not exceed 440V, 50Hz or 60Hz. 5.1.2 Voltage fluctuation: The solenoid valve should be able to work normally when it fluctuates within the range of 85% to 110% of the rated voltage. 5.1.3 Maximum working pressure: Maximum working pressure: 3.0Mpa (for Class B working fluid: 4.15Mpa). 5.1.4 Applicable ambient temperature: -20℃～+55℃. 5.1.5 Applicable ambient humidity: below 95%RH. JB/T10302-2001
5.1.6 Allowable temperature of refrigeration working fluid: -20℃～+120℃ (-25℃ at the moment of defrosting). 5.2 Performance requirements
5.2.1 Appearance: There should be no defects such as peeling, bruises, scratches, etc. that affect the use. 5.2.2, Dimensions: Consistent with the drawings and technical documents approved to the specified degree. 5.2.3 Pressure resistance: The solenoid valve should be able to withstand a liquid pressure of 1.5 times the maximum working pressure for 3 minutes, and there should be no leakage, abnormal deformation or damage.
5.2.4 Air tightness: When the solenoid valve is under the maximum working pressure, it should maintain 1in, and no bubbles should escape. Minimum breaking pressure: The solenoid valve should be kept under the water pressure of 5 times the maximum working pressure for 1min without breaking. 5.2.5
Maximum action pressure difference: When the solenoid valve is at 85% of the rated voltage, the maximum action pressure difference shall not be less than 2.1Mpa. The valve should be able to operate reliably. 5.2.6
Minimum action pressure difference: When the solenoid valve is at 85% of the rated voltage, the minimum action pressure difference is 0Mpa, and the valve should be able to operate reliably. Internal leakage: When the voltage valve is under the pressure difference of 2.1Mpa, its internal leakage shall not exceed the provisions of Table 3. 5.2.8
Table 3 Internal leakage
Valve port diameter
Leakage
ml/ain
5.2.9 Flow rate: When the pressure difference between the inlet and outlet of the solenoid valve is △P-0.2MPa, the gas flow rate shall comply with the provisions of Table 4. Table 4 Flow rate
Valve port diameter
≥196
≥367
Insulation resistance: The insulation resistance between the solenoid valve wiring terminal and the shell shall not be less than 100MQ. 5.2.10
Electrical strength: The solenoid valve coil terminal and the shell shall withstand the test voltage specified in Table 5 for 1min (or alternative test voltage, for 1s), without breakdown and flashover. Table 5 Test voltage
Line diagram Rated working voltage
Test voltage
Alternative test voltage
≤250
Turn-to-turn insulation: Under the test voltage specified in Table 6, the output attenuation waveform and the standard waveform should coincide. 5.2.12
JB/T10302-2001
5.2.13 Coil temperature rise: The coil is of Class B insulation structure, not exceeding 75K. Class F insulation structure, not exceeding 100K. 5.2.14 Noise: not more than 45dB(A).
5.2.15 Vibration: After the solenoid valve is subjected to the vibration test, the parts shall not be loose and shall meet the requirements of 5.2.4, 5.2.6, 5.2.7, 5.2.8, 5.2.10 and 5.2.11.
5.2.16 High temperature resistance: After the solenoid valve is subjected to the high temperature resistance test, it shall still meet the following requirements: a) The parts shall not be loose, and the insulation shall not be deformed, damaged or cracked; b) It shall meet the requirements of 5.2.4, 5.2.6, 5.2.7, 5.2.8, 5.2.10, 5.2.11 and 5.2.12. 5.2.17 Low temperature resistance: After the solenoid valve is subjected to the low temperature resistance test, it shall meet the requirements of 5.2.4, 5.2.6, 5.2.7, 5.2.8, 5.2.10, 5.2.11 and 5.2.12.
5.2.18 Hot and cold shock
After the solenoid valve is subjected to the thermal shock test, it can still meet the following requirements: a) The parts shall not be loose, and the insulation shall not be deformed, damaged or cracked; b) It shall meet the requirements of 5.2.4, 5.2.6, 5.2.7, 5.2.8, 5.2.10, 5.2.11 and 5.2.12. 5.2.19 Salt spray test: After the solenoid valve is subjected to the salt spray test, the base metal shall not be corroded and it shall meet the requirements of 5.2.4, 5.2.10, 5.2.11 and 5.2.12.
5.2.20 Durability: After the solenoid valve is operated 355,000 times, there shall be no abnormal sound and it shall meet the requirements of 5.2.4, 5.2.6, 5.2.7, 5.2.8, 5.2.10 and 5.2.11. 6 Test methods
6.1 Environmental conditions
Temperature: 15℃~35℃
Relative humidity: 20%80%;
Air pressure: 84kPa~106kPa.
6.1.2 Requirements for measuring instruments and gauges
Measuring instruments, instruments and gauges shall comply with the requirements of JB/T4119. 6.2 Test methods
6.2.1 Appearance inspection
Visually inspect scars, stains, deformation and welding status, which shall comply with the requirements of 5.2.1. 6.2.2 Dimension inspection
Use plug gauges and vernier calipers to check the interface and external dimensions, which shall comply with the requirements of 5.2.2. 6.2.3 Pressure test
Connect as shown in Figure 1, the specified flow direction of the solenoid valve is opposite to the flow direction of the test system medium, block the inlet end, and apply a water pressure of 1.5 times the maximum working pressure to the outlet end. The pressurization time is 3 minutes. It should meet the requirements of 5.2.3. 4
JB/T10302-2001
1. Pump 2. Overflow valve 3, 6. Pressure gauge
4. High-pressure switch
5. Pressure reducing valve
7. Solenoid valve under test
Figure 1 Pressure resistance, air tightness, minimum breaking pressure, maximum action and minimum action pressure difference test device Figure 6.2.4 Air tightness test
Remove the solenoid valve coil and install the solenoid valve on the device in Figure 1, so that its specified flow direction is opposite to the flow direction of the test system medium, block the inlet end, and apply nitrogen or air with the maximum working pressure to the outlet end. Immerse the solenoid valve in a water tank and apply pressure for 1 minute. It should meet the requirements of 5.2.4.
6.2.5 Minimum breaking pressure test
Connect as shown in Figure 1. The specified flow direction of the solenoid valve is opposite to the flow direction of the test system medium. Block the inlet end and apply a water pressure of 5 times the maximum working pressure to the outlet end. Pressurize for 1 minute. It should meet the requirements of 5.2.5. 6.2.6 Maximum action pressure difference
Connect as shown in Figure 1. The specified flow direction of the solenoid valve is the same as the flow direction of the test system medium. Input nitrogen or air with a pressure equal to 2.1MPa from its inlet end. Confirm that the action of the valve meets the requirements of 5.2.6 at 85% of the rated voltage and 50Hz power supply. 6.2.7 Minimum action pressure difference
Connect as shown in Figure 1. The specified flow direction of the solenoid valve is the same as the flow direction of the test system medium. The pressure difference between the inlet and outlet of the solenoid valve is 0MPa. Confirm that the action of the valve meets the requirements of 5.2.7 at 85% of the rated voltage and 50Hz power supply. 6.2.8 Internal leakage test
Connect as shown in Figure 2. Under normal temperature conditions, the specified flow direction of the solenoid valve is the same as the flow direction of the test system medium. Input nitrogen or air with a pressure equal to 2.1MPa from its inlet. First, operate the valve 5 times, then close the solenoid valve and observe the flow meter value. It should meet the requirements of 5.2.8.
Gaojue Gas Source
JB/T10302-2001
1, 4. Pressure gauge 2, 6, 7. High pressure switch 3. Pressure relief valve 5. Gas storage bottle 8. Solenoid valve to be tested 9. Flow meter Figure 2 Internal leakage and flow test device diagram
6.2.9 Flow test
Connect as shown in Figure 2. Adjust the pressure reducing valve so that the pressure of air or nitrogen passing through the solenoid shelf is 0.2MPa. Measure the flow of the test, which should meet the requirements of 5.2.9.
6.2.10 Insulation resistance test
After the coil is immersed in water at room temperature for 24 hours, the insulation resistance between the coil terminal and the shell is measured in the water with a DC500V megohmmeter. It shall meet the requirements of 5.2.10.
6.2.11 Electric strength test
After the coil is immersed in water at room temperature for 24 hours, a 50Hz test voltage with a near sine wave is applied between the charged body and the non-charged metal parts in the water. The current is not more than 5mA and the time is 1min (or the alternative test voltage, the time is 1s). It shall meet the requirements of 5.2.11. The test voltage and alternative test voltage of various working voltages are in accordance with Table 5. 6.2.12 Coil inter-turn insulation test
When the test peak voltage (1 pulse) specified in Table 6 is applied between the round terminals of the line, the output attenuation waveform and the standard waveform shall meet the requirements of 5.2.12. The test peak value voltage is in accordance with Table 6. Table 6 Test voltage
Rated working voltage of coil
Test peak voltage
6.2.13 Temperature rise test of coil
≤130
≤440
After the rated voltage of 50Hz is applied to the coil for 2h, the temperature rise value of the coil is measured by the resistance method, which shall meet the requirements of 5.2.13. a) Calculate the temperature rise value according to the following formula: At =
(234.5+1,)+t,-t2
Where △t: temperature rise value of coil, K; t,: ambient temperature at the beginning of the test, ℃: t,: final ambient temperature, ℃:
JB/T10302--200
R,: coil resistance value at temperature t,2; R: coil resistance value at temperature t,2: b) Line temperature: t=△tt (℃).
6.2.14 Noise test
The test product is placed 30cm away from the sound pickup of the noise meter. The voltage applied in the test is the rated voltage of 50Hz, which meets the requirements of 5.2.14 (but excluding the instantaneous action sound). 6.2.15 Vibration test
The solenoid valve is vibrated at 33Hz and 2mm full amplitude in the X, Y and Z directions for 2h in the state of no power, no load and no pressure. It should meet the requirements of 5.2.15. 6.2.16 High temperature resistance test
The solenoid valve is placed in a constant temperature box at a temperature of 120℃*5℃ for 24h in the state of no power, no load and no pressure. Then it is placed at normal temperature and humidity for 1h. It should meet the requirements of 5.2.16. 6.2.17 Low temperature resistance test
The solenoid valve is placed in a constant temperature box at -30℃. 5c for 24 hours without power, load and pressure, and then placed at room temperature and humidity for 1 hour. It should meet the requirements of 5.2.17. 6.2.18 Hot and cold shock test
The solenoid valve is placed in a constant temperature box at -30℃. 5c for 24 hours without power, load and pressure, and then placed at room temperature and humidity for 1 hour. It should meet the requirements of 5.2.18. 6.2.18 Cold and hot shock test
The solenoid valve is placed in a constant temperature box at 120℃*. 1 hour without power, load and pressure, and then placed at room temperature for 0.5 hours: -30℃_5c for 1 hour as one cycle. After five cycles, it is placed at room temperature for 1 hour. It should meet the requirements of 5.2.18. 6.2.19 Salt spray test
The solenoid valve is placed in a constant temperature box at 120℃*. 1 hour without power, load and pressure, and then placed at room temperature for 1 hour. It should meet the requirements of 5.2.19.
6.2.20 Life test
Connect as shown in Figure 3:
a) Pass water or air with a pressure of 2.45MPa to the inlet of the solenoid valve, and open and close the solenoid valve continuously for 55,000 times at a frequency of 20 times per minute in a normal temperature environment:
b) Then pass water or air with a pressure of 1.96MPa to the inlet of the solenoid valve, and open and close it continuously for 300,000 times at a frequency of 20 times per minute in a normal temperature environment. The solenoid valve should operate correctly during the entire test and should meet the requirements of 5.2.20. Note: When the test is terminated due to an accident caused by something other than the product, the number of actions can be calculated cumulatively. JB/T10302—2001
1. Pump 2.Overflow valve 3, 6. Pressure gauge 4, 8, 9. High-pressure switch 5. Pressure reducing valve 7. Gas bottle 10. Solenoid valve under test Figure 3 Life test device diagram
7 Inspection rules
Solenoid valves shall be subject to factory inspection and type inspection in accordance with the requirements of this standard. 7.1 Factory inspection
Products that have passed the type inspection and whose performance has been confirmed shall be randomly selected from the qualified products during the production process. The products shall be selected according to the normal inspection sampling plan of GB/T2828 and shall be inspected and qualified before leaving the factory according to the provisions of Table 7.
Table 7 Factory Inspection Items
Airtightness
Maximum operating pressure difference
Minimum operating pressure difference
Internal leakage
Insulation between coils
Insulation resistance
Electrical strength
Type inspection
Test method
Unqualified category
7.2.1 Type inspection is carried out in the following cases: a) Before the new product is put into production;
b) When the interval is more than one year:
c) When there is a major change in design or material: JB/T10302-2001
d) When the user or the superior quality department has a requirement; e) The products produced continuously are carried out once a year. 7.2.2 Type inspection items
All items in 6.2 of this standard.
7.2.3 Sampling and discrimination
The sampling method is in accordance with GB/T2829, discrimination level I, 2-time sampling plan, unqualified quality level RQL see Table 8, samples are randomly selected from qualified products of factory inspection.
7.2.4 Type inspection sequence and sample grouping
Type inspection sequence and sample grouping are in accordance with Table 8. Table 8 Test sequence and sample grouping
3 Withstand voltage
Small breaking pressure
Highest operating pressure difference
Lowest operating pressure difference
8 Internal leakage
10|Insulation resistance
11 Electrical strength
Insulation between coil turns
Wire diagram temperature rise
16 High temperature resistance
Low temperature resistance
Hot and cold shock
Salt spray test
7.2.5 Judgment standard
JB/T10302—2001
Items 10, 11, 12 and 13 in Table 8 are Class A defects and must all be passed at one time. The remaining items shall be judged according to Table 9. Table 9 Sampling plan
8 Marking, instruction manual
8.1 Marking
Number of samples
First time 4
Second time 4
First time 2
Second time 2
The marking shall meet the requirements of 7.4.1 in GB14536.1. 8.1.1
The solenoid valve body label shall indicate the following contents: Name and model of solenoid valve:
Trademark or manufacturer name:
Working medium flow direction:
Product number:
Year and month of manufacture. The solenoid valve coil label shall indicate the following contents: Trademark;
Product name:
Rated voltage and frequency;
Power consumption:
Product number.
8.2 Instruction Manual
The instruction manual shall include the following contents:
a) Product name, model, trademark:www.bzxz.net
Manufacturer name and address:
Main performance parameters of the product:
Appearance and installation dimensions:
Usage conditions and precautions.
9 Packaging, transportation, purchase and storage
9.1 Packaging
9.1.1 Packaging mark
The product packaging box shall have the following marks:
a) Manufacturer name:
b) Product name, model, trademark:
Qualified judgment number Ac
Unqualified judgment number Re
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