This standard specifies the safety requirements and test methods for household diffusion absorption refrigerators and refrigerator-freezers (hereinafter referred to as "absorption refrigerators", "absorption refrigerator-freezers" or collectively "absorption refrigerators") in addition to the special requirements of GB4706.13. This standard applies to absorption refrigerators below 500L. This standard does not apply to absorption refrigerators for special purposes. QB 1842-1993 Safety requirements for household diffusion absorption refrigerators and refrigerator-freezers QB1842-1993 standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
Safety requirements for household diffusion absorption refrigerators and
Refrigerator-freezers
Subject content and scope of application
QB184293
This standard specifies the safety requirements and test methods for household diffusion absorption refrigerators and refrigerators (hereinafter referred to as "absorption refrigerators", "absorption refrigerator-freezers" or collectively referred to as "absorption refrigerators") except for the special requirements of GB4706.13. This standard is applicable to absorption refrigerators below 5001. This standard is not applicable to absorption refrigerators for special purposes. 2 Terminology
Fire-extinguishing safety valve Fire-extinguishing safety valve A device used to cut off the gas source of a controlled burner when the burner is extinguished. 3 Technical requirements
3.1 Safety requirements for absorption refrigeration systems
3.1.1 The brittle strength of the absorption refrigeration system shall not be less than 5 times the maximum working pressure measured at an ambient temperature of 43°C. The manufacturer shall provide the testing agency with the approved information (system strength design calculation and test data). 3.1.2 Pressure Reducing Device Protection
The absorption refrigeration system shall have one of the following pressure reducing devices: a. A safety valve with an outlet diameter of not less than 6.4 mm; h. A rupture disc with an outlet diameter of not less than 1.6 mm; c. A fusible plug with a maximum melting point of 138 and an outlet diameter of not less than 1.6 mm. 3.1.3 After the pressure reduction and air tightness test of the absorption refrigeration system according to the method in 4.2.1, the refrigeration system shall have no cracks, residual deformation and bubble leakage. 3.2 Absorption Combustion System
3.2.1 Under the rated heat load, the combustion exhaust gas shall be measured according to the method in 4.3. The carbon monoxide content of the exhaust gas from the exhaust pipe shall not be less than 0.03% (excess air coefficient = 1).
3.2.2 The wind resistance of gas or oil burners shall be tested according to the method of Article 4.4. There shall be no flashback and flameout. 3.2.3 The gas source shall be tested according to the method of Article 4.5 under high pressure, low pressure and pressure fluctuation. The flame shall not flash back, spark or flameout. 3.2.4 The gas performance of the gas circuit system shall be tested according to the method of Article 4.6. There shall be no pressure drop. 3.2.5 The gas system must be equipped with a flameout safety valve. When tested according to the method of Article 4.7, the magnet attraction time shall not be greater than 209, and the release time shall not be greater than 40.
3.2.6 When the kerosene container is tested according to the method of Article 4.8, there shall be no leakage. 4 Test methods
4.1 General test conditions
4.1.1 Laboratory conditions
Approved by the Ministry of Light Industry of the People's Republic of China on October 5, 1993 and implemented on June 1, 1994
QR 1842-93
4.1.1.1 Room temperature 2-10 (°C). During the test, the influence of heat source and air flow should be avoided.
4.1.1.2 Ventilation facilities should be provided. The carbon dioxide content in the indoor air should be kept less than 0. 002, the carbon dioxide content should be 0.2%
4.1.2 Test gas
4.1.2.1 Artificial gas is made from local coal. During the test, the Wobac index of the gas should not change more than 2%. 4.1.2.2 Liquefied petroleum gas should be tested by using open bottle gas and bottom bottle gas. 4.1.2.3 The gas source should be provided by the manufacturer. 4.1.3 Test instruments, see Table 1.
Table 1 Test instrument specifications and accuracy
Test items
Atmospheric gas
Gas pressure Gas construction environment Carbon dioxide Carbon nitride Instrument name Moving trough mercury barometer: Fixed gas meter Air-eating gas meter (type positive pressure meter Wet and dry bed flow meter Heat combustion meter or absorption gas analyzer Color meter, infrared meter Infrared meter or absorption gas analyzer 4.2 Absorption refrigeration system safety performance test al--10% kPa
0~-1 005 Pabzxz.net
0~buo Pa
Minimum change
0. 02 m*/h
4.2. Place the refrigeration system filled with working fluid in an environment with safety protection measures. Pressurize with nitrogen or dry compressed air: the pressure is slowly increased. First, the pressure is increased to 50% of the maximum working pressure, and then the pressure is increased to the specified test pressure at a rate of 10% of the test pressure, that is, twice the maximum working pressure, for 10 minutes, and then the pressure is reduced to the maximum working pressure. The refrigeration system is immersed in water at 25±10℃ for 10 minutes. After visual inspection, it should meet the requirements of 3.1.5. 4.3 Test for carbon dioxide content in combustion gas 4.3.1 The combustion gas sampling can be done mechanically or manually. The sampling method and connection method are shown in Figure 14.3.2 After the sample was placed under the rated heat load of the absorption refrigerator for 30 min, the temperature was set at 0.05-0.5[,/min The exhaust gas is taken out at the same rate and analyzed in the same gas sample, and it should comply with the provisions of 3.2. 4.3.3 The oxygen content in the exhaust gas taken should not exceed 14%, and the carbon dioxide content when the excess air coefficient a==1 is calculated by the following formula? Venting position
Ba Gan sample this Deng
People 1 Sampling
Venting position
Sampling position
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QB1842—93
R Mechanical sampling
Continued Figure 1
1-Refrigerator drying, 2 Burner 13--Sampler; 4-Adjustment bracket + 5 Condenser 6-. Condensate bottle 7 Connecting hose 8--Three-way valve; 9--Sampling bottle: 10--Drag pressure bottle + 11-Sampling strip, 12-Flue gas analyzer CO°-CO\ (O,/20. 9)
1-0, /20.9
Wherein: CO,-1-Carbon monoxide content in exhaust gas when excess air coefficient is 1,%; CO\-Carbon monoxide content in exhaust gas sample,%,0,Oxygen content in exhaust gas sample,%:
CO\-Carbon monoxide content in test room air,%. 4.4 Wind resistance test
Use a household variable speed fan or a stable wind source to blow air towards the four walls of the refrigerator, so that the wind speed at the burner flame is 2m/s, 5 minutes each time, and the result should meet the requirements of 3.2.2. 4.5 Combustion stability test
In the range of 0.5 to 1.5 times the rated pressure of the gas, the gas composition is within a certain fluctuation range. The flame combustion should meet the requirements of 3.2.3.
4.6 Gas pipeline system air tightness test
When the air inlet valve is in the open and closed positions, 9806Pa (gauge pressure) compressed air is introduced from the gas inlet nozzle for 1 minute each: check with a type 7 pressure gauge (when the valve is in the open position, the burner nozzle should be sealed with a process plug). The result should meet the requirements of Article 3.2.4.
4.7 Fire safety valve action time test
Use a stopwatch to measure the release time and pull-in time of the flameout safety valve, and use the arithmetic mean of 10 tests as the action time, which should meet the requirements of Article 3.2.5.
4.8 Kerosene container permeability test
The container is filled with kerosene to the bottom of the filling port, and the outer surface of the container is wiped clean with a clean rag and placed on white filter paper for 2 hours. The result of visual inspection should meet the requirements of Article 3.2.6.
Additional instructions:
This standard is proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Center for Standardization of Household Electrical Appliances, and was drafted by Beijing Household Electrical Appliances Research Institute and Guangzhou Daily Electrical Appliances Research Institute. The main drafters of this standard are Shou Yuanming, Gong Hongbao, Wei Keqin, Jin Jiarong, and Hu Xiongfei.
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