JB/T 7659.3-1995 Ceiling air cooler for Freon refrigeration equipment
Some standard content:
Mechanical Industry Standard of the People's Republic of China
For Freon Refrigeration Devices
Ceiling Air Coolers
1 Subject Content and Scope of Application
JB/T 7659.3--95
Replaces ZBJ73038-89
ZB J73 034-89
This standard specifies the terminology, product classification, technical requirements, test methods, inspection rules, marking, packaging and storage of ceiling air coolers for Freon refrigeration devices (hereinafter referred to as air coolers). This standard applies to Freon direct evaporation ceiling air coolers for medium and small cold storages with R12 (R134a), R22 and R502 as refrigerants that are supplied separately.
2 Reference standards
GB699 Technical conditions for high-quality carbon structural steel
GB700 Carbon structural steel
Dimensions, shapes, weights and tolerances of cold-rolled steel sheets and strips GB708
Cold-rolled steel strips for carbon structural steel
GB1527
Drawn copper tubes
GB/T 1804
General tolerances
GB2040
Pure copper sheet
GB 2059
Pure copper strip
Unindicated tolerances for linear dimensions
Dimensions and tolerances of aluminum and aluminum alloy plates GB 3194
GB/T3618 Aluminum and aluminum alloy patterned plates
GB3880 Aluminum and aluminum alloy plates
GB 5066
GB 5117
GB 8162
Single hot-dip galvanized steel sheet
Carbon steel welding rod
Seamless steel pipe for structure
GB/T13274 Technical conditions for general-purpose axial flow fans GB/T13306 Label
JB4088 Daily tubular electric heating elements
JB/T6917 Pressure vessels for refrigeration equipment
3 Terms
3.1 Ceiling air cooler
A fan or blower is used to promote air circulation. When the air flows through the product, the air temperature is reduced. It is a direct evaporative cooling and cooling equipment suitable for various storage temperatures and suspended near the top of the storage. 4 Product classification
4.1 Type
Approved by the Ministry of Machinery Industry on June 16, 1995
Implemented on July 1, 1996
Ceiling type.
4.2 Model
4.2.1 Model Indication Method
JB/T7659.3—95
The model of the air cooler consists of uppercase Chinese phonetic letters and Arabic numerals. The model indication method is as follows: Model modification number: Indicated by numbers, omitted for the first design product Nominal cooling area: Based on the surface area of the heat exchange tube, indicated by numbers (rounded), m2 L for refrigerated cooling, D for refrigerated freezing, and J for freezing Ceiling code
Refrigerant Freon code
4.2.2 Model example
FDL20: Indicates that the cooling is for refrigerated cooling, with a nominal cooling area of 20m2, and is a ceiling air cooler designed for the first time. FDD60: Indicates that the freezing is for refrigerated freezing, with a nominal cooling area of 60m2, and is a ceiling air cooler designed for the first time. FDJ100: indicates freezing, nominal cooling area, 100m2, the first design of ceiling-mounted air cooler. 4.3 Basic parameters
4.3.1 Nominal cooling area
Preferred series for nominal cooling area of air cooler are shown in Table 1. Table 1
Cooling area, m2
4.3.2 Thermal parameters
The heat transfer coefficient of air cooler under nominal working condition shall be in accordance with the provisions of Table 2. Table 2
Refrigerant
R12 (R134a)
4.3.3 Nominal working condition
Liquid supply method
Forced expansion valve
Nominal working condition of air cooler shall be in accordance with the provisions of Table 3. Cooling room for cooling objects
Frozen room for freezing objects
Freezing room
Cold room temperature
Inlet and outlet air temperature difference
Face wind speed
Relative humidity
Frost layer thickness
Note: 1) The temperature difference in the table refers to the difference between the storage temperature and the evaporation temperature. 4.3.4
Structural parameters
B/T7659.3—95
Cooling room for cooling objects
The structural parameters of the air cooler shall be in accordance with the provisions of Table 4. Table 4
Outer diameter d.
4.4 Design conditions
Wall thickness 8.
0. 5～1.5
Tube spacing S
25～52
Arrangement
Equilateral or isosceles
Triangle
Air cooler design conditions shall be in accordance with the provisions of Table 5. Material
Refrigerant
R12(R134a)
5 Technical requirements
General requirements
Design pressure, MPa
Frozen cold storage room
85%~95%
Average thickness is about 1
Sheet thickness?
0.15~0.30
Pitch:
2～12
Freezing room
Fan motor
Extrusion type or
Suction typebZxz.net
Projected temperature ℃
Air coolers shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 5.2 Materials
The main materials used for air coolers are shown in Table 6. Table 6
Standard No.
GB699,GB700,GB708,GB716,GB5066,GB8162GB 1527,GB 2040,GB 2059
GB 3194,GB/T 3618,GB 3880
GB5117
5.3 Processing requirements
JB/T7659.3—95
5.3.1 When the heat exchange tube is a sleeve expansion tube, the fin punching is "L\" shaped or "L" shaped extended flange, and the flange should not be broken. 5.3.2 The end plate should be flat and should not be cracked or skewed. 5.3.3 The distance between the fins should be uniform.
5.3.4 The contact between the fin and the tube should be tight, and there should be no scratches on the inner wall after mechanical expansion. 5.3.5 The air cooler should be equipped with effective defrosting facilities. No water droplets should splash out of the air cooler during the defrosting process. 5.3.6 The air cooler should be equipped with a water collection tray of appropriate depth for condensate. There should be no water, and there should be a drain pipe at the bottom of the water collection tray, and all condensed water can be discharged during defrosting (there should be an electric heating device to prevent water from freezing). 5.3.7 The fan used in the air cooler should comply with the requirements of GB/T13274, and the rotation should be flexible, smooth and without obstruction. The motor of the air cooler fan should be completely enclosed or properly enclosed to prevent moisture. 5.3.8 The defrosting electric heating pipe of the air cooler should comply with the requirements of JB4088, and the outer shell of the electric heating pipe should be made of stainless steel. 5.3.9 The gas-liquid manifold and the finned tube should be unobstructed after welding. 5.3.10 The surface of the ferrous metal parts used in the air cooler should be treated with anti-corrosion. 5.4 Processing tolerance requirements
5.4. 1 The roundness tolerance of the elbow pipe section shall not exceed 15% of the nominal diameter, and the wall thickness reduction shall not exceed 17% of the wall thickness. 5.4.2 The water collection tray shall be flat, and its straightness and flatness shall not exceed 1mm within 1m. 5.4.3 The unnoted tolerances of the surface dimensions of machined parts shall comply with the m grade specified in GB/T1804, and the unnoted tolerances of the non-machined surface dimensions shall comply with the ℃ grade.
5.4.4 When the effective length of the heat transfer tube between the two end plates of the air cooler is not more than 1m, the tolerance is ±4mm, and when the effective length is greater than 1m, the tolerance is ±6mma
5.4.5 For the windward side of the air cooler, when the diagonal length is not more than 1m, the tolerance of the difference between the two diagonals is ±5mm; the diagonal length is ±6mm. When it is greater than 1m, the difference between the two diagonals is allowed to be ±10mm. 5.5 Performance requirements
5.5.1 Air pressure test
The test shall be carried out in accordance with the provisions of 6.3. The air cooler shall not be deformed or leak. 5.5.2 Cleanliness
The inside of the air cooler shall be clean and dry, and the impurity content on the surface in contact with the refrigerant shall not exceed 200mg/m. 5.5.3 Performance parameter test
Inspect in accordance with the provisions of 6.7. The cooling capacity, air volume and total pressure shall meet the design requirements. 5.5.4 Insulation resistance requirements
The insulation resistance (cold state) of the live parts of the air cooler to the ground and to the non-live metal parts shall not be less than 20M2. 5.5.5 Electrical strength requirements
The electrical insulation between the live parts and the non-live metal parts of the air cooler should be able to withstand the electrical strength test, and there should be no breakdown or flashover after 1 minute.
5.6 Appearance requirements
5.6.1 The fin surface should not have defects such as corrosion, cracks, obvious scratches and abrasions, and the surface should be clean and bright, free of oil and other residues. 5.6.2 The fin edge should be straight and should not have burrs, flashes or cracks. 5.6.3 The inner and outer surfaces of the pipe should be clean and free of rust marks. The pipe should not have obvious deformations such as dents, bends, twists, etc. The pipe mouth should be flat and free of burrs. 5.6.4 The elbow surface should not have defects such as wrinkles and indentations. 5.6.5 The outer surface of the air cooler should be clean, the paint layer should be uniform and smooth, the color should be consistent, and there should be no defects that affect the appearance. 5.7 Completeness
5.7.1 The air cooler shall have:
a. Refrigerant liquid inlet joint,
Refrigerant gas outlet joint,
Tube nut or assembly flange,
d. Fan;
JB/T7659.3—95
Defrost water tray, water inlet interface or defrost electric heating pipe; water collecting tray and water drain interface
g. Mounting bracket.
5.7.2 According to the design requirements, the air cooler shall have a refrigerant valve. 5.8 Warranty period
If the user complies with the provisions of the product manual, within 18 months from the date of shipment from the manufacturer, if the product is damaged or cannot work normally due to poor manufacturing quality, the manufacturer shall replace or repair it free of charge. 6 Test method
6.1 Appearance inspection
The appearance inspection shall be carried out visually under normal illumination according to the requirements of 5.6. 6.2 Processing tolerance inspection
The processing tolerance inspection shall be carried out by using a length measuring tool with qualified measurement and a minimum graduation value of not less than 1mm, and by measuring item by item according to the requirements of 5.4.
6.3 Pressure test
6.3.1 After the air cooler is manufactured, it shall be subjected to a gas pressure test of not less than 1.15 times the design pressure. During the gas pressure test, the gas pressure shall rise slowly. After reaching the test pressure, the pressure shall be maintained for 10 minutes. After it is reduced to the design pressure, it shall be inspected. There shall be no leakage and abnormal deformation. 6.3.2 The gas used for the gas pressure test shall be dry clean air or dry nitrogen. The gas temperature during the test shall not be lower than 5℃. 6.3.3 Reliable safety measures shall be taken during the gas pressure test. 6.3.4 Two calibrated pressure gauges with the same range shall be used for the pressure test. The range of the pressure gauge should be 1.5 to 2 times the test pressure, the diameter of the pressure gauge dial should not be less than 100mm, and the accuracy of the pressure gauge should not be less than Class 1.5. 6.3.5 After the pressure test, the residual water vapor in the pipe should be removed and dried. 6.3.6 After the manufacture of each air cooler, it should be filled with positive pressure dry nitrogen or specially treated dry air (dew point below 30℃), the maximum pressure should not exceed 0.1MPa, and it should be sealed immediately. 6.3.7 For test methods and test safety precautions, see JB/T6917. 6.4 Insulation resistance test
Measured by 500V megohmmeter.
6.5 Insulation electrical strength test
Electrical strength test between the live parts and non-live metal parts of the air cooler, the test voltage is 1000V + 2 times the rated voltage, the test time is 1min, and there is no breakdown or flashover. When a large number of tests on the same product are conducted without problems, a test voltage of 120% for 1 second is allowed to replace the above test. When the motor and other electrical components have undergone electrical strength tests, their terminals can be disconnected for this test. 6.6 Cleanliness inspection
The product pipe cluster is pressure-washed with trichloroethylene for 5 minutes. The flushing pressure must ensure that the dirt can be effectively washed away. The cleaning liquid is filtered with a 38um filter. The filter is dried in a drying oven at 105±5°C before and after filtering and the weight is measured. The difference between the two measured weights is the cleanliness of the product.
6.7 Performance parameter test
The performance parameter test of the air cooler can be carried out by industrial testing or relevant standard testing. The test report shall provide at least the following data: model of air cooler;
refrigerant used;
air volume of air cooler fan, m\/h;JB/T 7659.3-95
input power of each motor, W; voltage used, V, current, A, dry bulb temperature at air cooler inlet, ℃; wet bulb temperature at air cooler inlet, C; dry bulb temperature at air cooler outlet, ℃, wet bulb temperature at air cooler outlet, ℃; temperature of refrigerant entering the air cooler, C; pressure, MPa, temperature of refrigerant leaving the air cooler,, pressure, MPa; total cooling capacity, kw;
atmospheric pressure of the test room, Pa.
Inspection rules
7.1 General requirements
The air cooler shall be inspected by the technical inspection department of the manufacturer in accordance with this standard and technical documents, and shall be allowed to leave the factory only after passing the inspection. 7.2 Inspection items
7.2.1 Inspection classification
The inspection of air coolers is divided into factory inspection and type inspection. 7.2.2 Inspection items
The inspection items of air coolers shall be in accordance with the provisions of Table 7. Table?
Inspection items
Performance test
Cleanliness
Processing quality
Appearance quality
Air pressure test
Insulation resistance
Electrical strength
Complete set of products
Contents of product label and factory documents
7.3 Strict inspection
Each air cooler shall be inspected after it is manufactured. 7.4 Type inspection
Factory inspection
Type inspection
7.4.1 Type inspection shall be carried out on at least one specification of new air coolers or old products that have undergone major reforms. 7.4.2 The performance test method may adopt industrial tests or relevant standard tests. 7.4.3 The internal cleanliness and moisture content of air coolers shall be implemented with strict process assurance. 8 Marking, packaging, transportation and storage
8.1 Marking
JB/T 7659.3-95
Each air cooler should be fixed with a label in a conspicuous position. The label should comply with the provisions of GB/T13306. The label content should include: model, name, factory number:
design pressure, test pressure;
refrigerant used:
cooling area,
total air volume and air pressure of the fan;
total power and electrical system:
name and trademark of the manufacturer;
weight:
date of manufacture.
2 The direction of rotation of the fan should be indicated.
8.2 Packaging
8.2.1 The air cooler should be covered with a plastic film layer, and the packaging layer should have appropriate rigidity. The air cooler should be properly fixed to prevent collision and damage to the fins.
The inner cavity of the air cooler should be filled with nitrogen at a pressure not higher than 0.1MPa, and the pipe mouth should be sealed. 8.2.3 When the air cooler is supplied separately from the factory, it should be accompanied by the following technical documents: Product certificate:
b. Product manual;
Packing list.
8.3 Storage
The air cooler should be stored in a well-ventilated and dry warehouse without corrosive gas. Additional instructions:
This standard was proposed and coordinated by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Air Conditioner Factory and Nanjing Wuzhou Refrigeration (Group) Company. The main drafters of this standard are Lv Linquan, Shen Hesheng and Mao Yongnian. 14788 Warranty period
If the user complies with the provisions in the product manual, the manufacturer shall replace or repair the product free of charge within 18 months from the date of shipment from the manufacturer if the product is damaged or fails to work properly due to poor manufacturing quality. 6 Test method
6.1 Appearance inspection
The appearance inspection shall be carried out visually under normal illumination according to the requirements of 5.6. 6.2 Processing tolerance inspection
The processing tolerance inspection shall be carried out item by item according to the requirements of 5.4 using a length measuring tool with qualified measurement and a minimum graduation value of not less than 1mm.
6.3 Pressure test
6.3.1After the air cooler is manufactured, it shall be subjected to an air pressure test of not less than 1.15 times the design pressure. During the air pressure test, the gas pressure shall rise slowly, and after reaching the test pressure, the pressure shall be maintained for 10 minutes. After it drops to the design pressure, it shall be inspected. There shall be no leakage or abnormal deformation. 6.3.2 The gas used in the pressure test should be dry clean air or dry nitrogen. The gas temperature during the test should not be lower than 5℃. 6.3.3 Reliable safety measures should be taken during the pressure test. 6.3.4 Two calibrated pressure gauges with the same range should be used for the pressure test. The range of the pressure gauge should be 1.5 to 2 times the test pressure, the diameter of the pressure gauge dial should not be less than 100mm, and the accuracy of the pressure gauge should not be lower than Class 1.5. 6.3.5 After the pressure test, the residual water vapor in the pipe should be removed and dried. 6.3.6 After each air cooler is manufactured, it should be filled with positive pressure dry nitrogen or specially treated dry air (referring to dew point below 30℃), the maximum pressure should not exceed 0.1MPa, and it should be sealed immediately. 6.3.7 See JB/T6917 for test methods and test safety precautions. 6.4 Insulation resistance test
Use 500V megohmmeter for measurement.
6.5 Insulation electrical strength test
Electrical strength test between live parts and non-live metal parts of air cooler, test voltage is 1000V + 2 times rated voltage, test time is 1min, no breakdown and flashover. When a large number of tests on the same product are successful, 120% test voltage and 1s test are allowed to replace the above test. When the motor and other electrical components have undergone electrical strength tests, their terminals can be disconnected for this test. 6.6 Cleanliness inspection
Pressure flushing of the product pipe cluster with trichloroethylene for 5min, the flushing pressure must ensure that the dirt can be effectively flushed away. Filter the cleaning liquid with a 38um filter, dry the filter in a drying oven at 105±5℃ before and after filtering, and measure the weight. The difference between the two measured weights is the product cleanliness.
6.7 Performance parameter test
The performance parameter test of air cooler can be carried out by industrial test or relevant standard test. The test report shall provide at least the following data: model of air cooler;
refrigerant used;
air volume of air cooler fan, m\/h;JB/T 7659.3-95
input power of each motor, W; voltage used, V, current, A, dry bulb temperature at air cooler inlet, ℃; wet bulb temperature at air cooler inlet, C; dry bulb temperature at air cooler outlet, ℃, wet bulb temperature at air cooler outlet, ℃; temperature of refrigerant entering the air cooler, C; pressure, MPa, temperature of refrigerant leaving the air cooler,, pressure, MPa; total cooling capacity, kw;
atmospheric pressure of the test room, Pa.
Inspection rules
7.1 General requirements
Air coolers shall be inspected by the technical inspection department of the manufacturer in accordance with this standard and technical documents, and only qualified ones are allowed to leave the factory. 7.2 Inspection items
7.2.1 Inspection classification
The inspection of air coolers is divided into factory inspection and type inspection. 7.2.2 Inspection items
The inspection items of air coolers shall be in accordance with the provisions of Table 7. Table?
Inspection items
Performance test
Cleanliness
Processing quality
Appearance quality
Air pressure test
Insulation resistance
Electrical strength
Complete set of products
Product label content and factory documents
7.3 Strict inspection
Each air cooler shall be inspected after it is manufactured. 7.4 Type inspection
Factory inspection
Type inspection
7.4.1 Type inspection shall be carried out on at least one specification of new air coolers or old products that have undergone major reforms. 7.4.2 The performance test method may adopt industrial tests or relevant standard tests. 7.4.3 The internal cleanliness and moisture content of air coolers shall be implemented with strict process assurance. 8 Marking, packaging, transportation and storage
8.1 Marking
JB/T 7659.3-95
Each air cooler should be fixed with a label in a conspicuous position. The label should comply with the provisions of GB/T13306. The label content should include: model, name, factory number:
design pressure, test pressure;
refrigerant used:
cooling area,
total air volume and air pressure of the fan;
total power and electrical system:
name and trademark of the manufacturer;
weight:
date of manufacture.
2 The direction of rotation of the fan should be indicated.
8.2 Packaging
8.2.1 The air cooler should be covered with a plastic film layer, and the packaging layer should have appropriate rigidity. The air cooler should be properly fixed to prevent collision and damage to the fins.
The inner cavity of the air cooler should be filled with nitrogen at a pressure not higher than 0.1MPa, and the pipe mouth should be sealed. 8.2.3 When the air cooler is supplied separately from the factory, it should be accompanied by the following technical documents: Product certificate:
b. Product manual;
Packing list.
8.3 Storage
The air cooler should be stored in a well-ventilated and dry warehouse without corrosive gas. Additional instructions:
This standard was proposed and coordinated by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Air Conditioner Factory and Nanjing Wuzhou Refrigeration (Group) Company. The main drafters of this standard are Lv Linquan, Shen Hesheng and Mao Yongnian. 14788 Warranty period
If the user complies with the provisions in the product manual, the manufacturer shall replace or repair the product free of charge within 18 months from the date of shipment from the manufacturer if the product is damaged or fails to work properly due to poor manufacturing quality. 6 Test method
6.1 Appearance inspection
The appearance inspection shall be carried out visually under normal illumination according to the requirements of 5.6. 6.2 Processing tolerance inspection
The processing tolerance inspection shall be carried out item by item using a length measuring tool with qualified measurement and a minimum graduation value of not less than 1mm, and measured according to the requirements of 5.4.
6.3 Pressure test
6.3.1After the air cooler is manufactured, it shall be subjected to an air pressure test of not less than 1.15 times the design pressure. During the air pressure test, the gas pressure shall rise slowly, and after reaching the test pressure, the pressure shall be maintained for 10 minutes. After it drops to the design pressure, it shall be inspected. There shall be no leakage or abnormal deformation. 6.3.2 The gas used in the pressure test should be dry clean air or dry nitrogen. The gas temperature during the test should not be lower than 5℃. 6.3.3 Reliable safety measures should be taken during the pressure test. 6.3.4 Two calibrated pressure gauges with the same range should be used for the pressure test. The range of the pressure gauge should be 1.5 to 2 times the test pressure, the diameter of the pressure gauge dial should not be less than 100mm, and the accuracy of the pressure gauge should not be lower than Class 1.5. 6.3.5 After the pressure test, the residual water vapor in the pipe should be removed and dried. 6.3.6 After each air cooler is manufactured, it should be filled with positive pressure dry nitrogen or specially treated dry air (referring to dew point below 30℃), the maximum pressure should not exceed 0.1MPa, and it should be sealed immediately. 6.3.7 See JB/T6917 for test methods and test safety precautions. 6.4 Insulation resistance test
Use 500V megohmmeter for measurement.
6.5 Insulation electrical strength test
Electrical strength test between live parts and non-live metal parts of air cooler, test voltage is 1000V + 2 times rated voltage, test time is 1min, no breakdown and flashover. When a large number of tests on the same product are successful, 120% test voltage and 1s test are allowed to replace the above test. When the motor and other electrical components have undergone electrical strength tests, their terminals can be disconnected for this test. 6.6 Cleanliness inspection
Pressure flushing of the product pipe cluster with trichloroethylene for 5min, the flushing pressure must ensure that the dirt can be effectively flushed away. Filter the cleaning liquid with a 38um filter, dry the filter in a drying oven at 105±5℃ before and after filtering, and measure the weight. The difference between the two measured weights is the product cleanliness.
6.7 Performance parameter test
The performance parameter test of air cooler can be carried out by industrial test or relevant standard test. The test report shall provide at least the following data: model of air cooler;
refrigerant used;
air volume of air cooler fan, m\/h;JB/T 7659.3-95
input power of each motor, W; voltage used, V, current, A, dry bulb temperature at air cooler inlet, ℃; wet bulb temperature at air cooler inlet, C; dry bulb temperature at air cooler outlet, ℃, wet bulb temperature at air cooler outlet, ℃; temperature of refrigerant entering the air cooler, C; pressure, MPa, temperature of refrigerant leaving the air cooler,, pressure, MPa; total cooling capacity, kw;
atmospheric pressure of the test room, Pa.
Inspection rules
7.1 General requirements
Air coolers shall be inspected by the technical inspection department of the manufacturer in accordance with this standard and technical documents, and only qualified ones are allowed to leave the factory. 7.2 Inspection items
7.2.1 Inspection classification
The inspection of air coolers is divided into factory inspection and type inspection. 7.2.2 Inspection items
The inspection items of air coolers shall be in accordance with the provisions of Table 7. Table?
Inspection items
Performance test
Cleanliness
Processing quality
Appearance quality
Air pressure test
Insulation resistance
Electrical strength
Complete set of products
Product label content and factory documents
7.3 Strict inspection
Each air cooler shall be inspected after it is manufactured. 7.4 Type inspection
Factory inspection
Type inspection
7.4.1 Type inspection shall be carried out on at least one specification of new air coolers or old products that have undergone major reforms. 7.4.2 The performance test method may adopt industrial tests or relevant standard tests. 7.4.3 The internal cleanliness and moisture content of air coolers shall be implemented with strict process assurance. 8 Marking, packaging, transportation and storage
8.1 Marking
JB/T 7659.3-95
Each air cooler should be fixed with a label in a conspicuous position. The label should comply with the provisions of GB/T13306. The label content should include: model, name, factory number:
design pressure, test pressure;
refrigerant used:
cooling area,
total air volume and air pressure of the fan;
total power and electrical system:
name and trademark of the manufacturer;
weight:
date of manufacture.
2 The direction of rotation of the fan should be indicated.
8.2 Packaging
8.2.1 The air cooler should be covered with a plastic film layer, and the packaging layer should have appropriate rigidity. The air cooler should be properly fixed to prevent collision and damage to the fins.
The inner cavity of the air cooler should be filled with nitrogen at a pressure not higher than 0.1MPa, and the pipe mouth should be sealed. 8.2.3 When the air cooler is supplied separately from the factory, it should be accompanied by the following technical documents: Product certificate:
b. Product manual;
Packing list.
8.3 Storage
The air cooler should be stored in a well-ventilated and dry warehouse without corrosive gas. Additional instructions:
This standard was proposed and coordinated by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Air Conditioner Factory and Nanjing Wuzhou Refrigeration (Group) Company. The main drafters of this standard are Lv Linquan, Shen Hesheng and Mao Yongnian. 14787 Performance parameter test
The performance parameter test of air cooler can be carried out by industrial test or relevant standard test. The test report shall at least provide the following data: model of air cooler;
refrigerant used;
air volume of air cooler fan, m\/h;JB/T 7659.3-95
input power of each motor, W; voltage used, V, current, A, dry bulb temperature at the inlet of air cooler, ℃; wet bulb temperature at the inlet of air cooler, C; dry bulb temperature at the outlet of air cooler, ℃, wet bulb temperature at the outlet of air cooler, ℃; temperature of refrigerant entering air cooler, C; pressure, MPa, temperature of refrigerant leaving air cooler,, pressure, MPa; total cooling capacity, kw;
atmospheric pressure of test room, Pa.
Inspection rules
7.1 General requirements
Air coolers shall be inspected by the technical inspection department of the manufacturer in accordance with this standard and technical documents, and only qualified ones are allowed to leave the factory. 7.2 Inspection items
7.2.1 Inspection classification
The inspection of air coolers is divided into factory inspection and type inspection. 7.2.2 Inspection items
The inspection items of air coolers shall be in accordance with the provisions of Table 7. Table?
Inspection items
Performance test
Cleanliness
Processing quality
Appearance quality
Air pressure test
Insulation resistance
Electrical strength
Complete set of products
Product label content and factory documents
7.3 Strict inspection
Each air cooler shall be inspected after it is manufactured. 7.4 Type inspection
Factory inspection
Type inspection
7.4.1 Type inspection shall be carried out on at least one specification of new air coolers or old products that have undergone major reforms. 7.4.2 The performance test method may adopt industrial tests or relevant standard tests. 7.4.3 The internal cleanliness and moisture content of air coolers shall be implemented with strict process assurance. 8 Marking, packaging, transportation and storage
8.1 Marking
JB/T 7659.3-95
Each air cooler should be fixed with a label in a conspicuous position. The label should comply with the provisions of GB/T13306. The label content should include: model, name, factory number:
design pressure, test pressure;
refrigerant used:
cooling area,
total air volume and air pressure of the fan;
total power and electrical system:
name and trademark of the manufacturer;
weight:
date of manufacture.
2 The direction of rotation of the fan should be indicated.
8.2 Packaging
8.2.1 The air cooler should be covered with a plastic film layer, and the packaging layer should have appropriate rigidity. The air cooler should be properly fixed to prevent collision and damage to the fins.
The inner cavity of the air cooler should be filled with nitrogen at a pressure not higher than 0.1MPa, and the pipe mouth should be sealed. 8.2.3 When the air cooler is supplied separately from the factory, it should be accompanied by the following technical documents: Product certificate:
b. Product manual;
Packing list.
8.3 Storage
The air cooler should be stored in a well-ventilated and dry warehouse without corrosive gas. Additional instructions:
This standard was proposed and coordinated by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Air Conditioner Factory and Nanjing Wuzhou Refrigeration (Group) Company. The main drafters of this standard are Lv Linquan, Shen Hesheng and Mao Yongnian. 14787 Performance parameter test
The performance parameter test of air cooler can be carried out by industrial test or relevant standard test. The test report shall at least provide the following data: model of air cooler;
refrigerant used;
air volume of air cooler fan, m\/h;JB/T 7659.3-95
input power of each motor, W; voltage used, V, current, A, dry bulb temperature at the inlet of air cooler, ℃; wet bulb temperature at the inlet of air cooler, C; dry bulb temperature at the outlet of air cooler, ℃, wet bulb temperature at the outlet of air cooler, ℃; temperature of refrigerant entering air cooler, C; pressure, MPa, temperature of refrigerant leaving air cooler,, pressure, MPa; total cooling capacity, kw;
atmospheric pressure of test room, Pa.
Inspection rules
7.1 General requirements
Air coolers shall be inspected by the technical inspection department of the manufacturer in accordance with this standard and technical documents, and only qualified ones are allowed to leave the factory. 7.2 Inspection items
7.2.1 Inspection classification
The inspection of air coolers is divided into factory inspection and type inspection. 7.2.2 Inspection items
The inspection items of air coolers shall be in accordance with the provisions of Table 7. Table?
Inspection items
Performance test
Cleanliness
Processing quality
Appearance quality
Air pressure test
Insulation resistance
Electrical strength
Complete set of products
Product label content and factory documents
7.3 Strict inspection
Each air cooler shall be inspected after it is manufactured. 7.4 Type inspection
Factory inspection
Type inspection
7.4.1 Type inspection shall be carried out on at least one specification of new air coolers or old products that have undergone major reforms. 7.4.2 The performance test method may adopt industrial tests or relevant standard tests. 7.4.3 The internal cleanliness and moisture content of air coolers shall be implemented with strict process assurance. 8 Marking, packaging, transportation and storage
8.1 Marking
JB/T 7659.3-95
Each air cooler should be fixed with a label in a conspicuous position. The label should comply with the provisions of GB/T13306. The label content should include: model, name, factory number:
design pressure, test pressure;
refrigerant used:
cooling area,
total air volume and air pressure of the fan;
total power and electrical system:
name and trademark of the manufacturer;
weight:
date of manufacture.
2 The direction of rotation of the fan should be indicated.
8.2 Packaging
8.2.1 The air cooler should be covered with a plastic film layer, and the packaging layer should have appropriate rigidity. The air cooler should be properly fixed to prevent collision and damage to the fins.
The inner cavity of the air cooler should be filled with nitrogen at a pressure not higher than 0.1MPa, and the pipe mouth should be sealed. 8.2.3 When the air cooler is supplied separately from the factory, it should be accompanied by the following technical documents: Product certificate:
b. Product manual;
Packing list.
8.3 Storage
The air cooler should be stored in a well-ventilated and dry warehouse without corrosive gas. Additional instructions:
This standard was proposed and coordinated by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Air Conditioner Factory and Nanjing Wuzhou Refrigeration (Group) Company. The main drafters of this standard are Lv Linquan, Shen Hesheng and Mao Yongnian. 1478
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