JB/T 7659.5-1995 Finned heat exchanger for Freon refrigeration equipment
Some standard content:
Mechanical Industry Standard of the People's Republic of China
Finned heat exchanger for Freon refrigeration equipment
1 Subject content and scope of application
JB/T 7659.5--95
Replaces ZBJ73035---89
ZB J73 039 -
JB/T 2796-91
JB/T 5444-91
This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of finned heat exchangers for Freon refrigeration equipment, including finned evaporators (referred to as evaporators) and finned air-cooled condensers (referred to as air-cooled condensers).
The evaporator in this standard is applicable to direct evaporation and forced ventilation unit air conditioners using R22 as the working fluid. Unit air conditioners with special working conditions can be used as a reference.
The air-cooled condenser in this standard is applicable to unit air conditioners with forced ventilation, food refrigeration equipment, and compression condensing units using R12 (R134a), R22, and R502 as working fluids.
This standard does not apply to room air conditioners.
2 Reference standards
GB 699
Technical conditions for high-quality carbon structural steel
GB 700
Carbon structural steel
Dimensions, shapes, weights and permissible deviations of cold-rolled steel sheets and stripsGB708
Carbon structural steel cold-rolled strips
GB1527 Drawn copper tubes
GB/T1804General tolerances for linear dimensions without tolerancesGB2040Pure copper plates
GB2059
GB3194
Pure copper strips
Dimensions and permissible deviations of aluminum and aluminum alloy platesGB/T 3618 4
Aluminum and aluminum alloy patterned plate
GB3880
GB5066
GB5117
Aluminum and aluminum alloy plates
Single hot-dip galvanized thin steel plate
Carbon steel welding rod
Seamless steel pipe for structure
GB8162
GB/T 13274
GB/T 13306
JB/T 6917
3 Terminology
Technical conditions for axial flow fans for general purpose
Pressure vessels for refrigeration equipment
3.1 Finned evaporator
It is a heat exchanger, a component that vaporizes the refrigerant liquid by absorbing heat in the refrigeration system, and acts as an air-cooled condenser when the heat pump is running. The fins are inserted into the tube clusters according to the specified sheet spacing, and the tube clusters are tightly combined by the tube expansion method. It consists of fins, tube clusters, side plates, liquid distributors, headers and capillaries. Approved by the Ministry of Machinery Industry on June 16, 1995
Implementation on July 1, 1996
3.2 Finned air-cooled condenser
JB/T7659.5-95
It is a kind of condenser, a heat exchanger, a component that uses forced ventilation to liquefy refrigerant vapor by releasing heat in the refrigeration system, and acts as an evaporator when the heat pump is running. The fins are inserted into the tube clusters according to the specified sheet spacing, and the tube clusters are tightly combined by the tube expansion method. It consists of fins, tube clusters, side plates, liquid distributors (or liquid distributors), headers, capillaries, fans and motors. 4 Product classification
4.1 Type
Forced ventilation direct evaporation or condensation finned tube type. 4.2 Model
4.2.1 Model Indication Method
The model of finned heat exchanger consists of capital Chinese Pinyin letters and Arabic numerals (hereinafter referred to as numbers), and its model indication method is as follows:
Evaporator:
Retrofit number: Indicated by numbers, omitted for the first design product Nominal evaporation area: Based on the surface area of the heat exchange tube, indicated by numbers (rounded), m Basic code of evaporator
Air-cooled condenser:
Retrofit number: Indicated by numbers, omitted for the first design product Nominal condensation area: Based on the surface area of the heat exchange tube, indicated by numbers (rounded), m2 Basic code of air-cooled condenser
4.2.2 Model Example
ZF40: Indicates an evaporator with a nominal evaporation area of 40m2, designed for the first time. FN100: Indicates an air-cooled condenser with a nominal condensation area of 100m2, designed for the first time. 4.3 Basic parameters
4.3.1 Thermal parameters
a. The heat transfer coefficient of the evaporator under nominal refrigeration conditions shall be as specified in Table 1. Table 1
The heat transfer coefficient of the air-cooled condenser under nominal refrigeration conditions shall be as specified in Table 2. Heat transfer coefficient K
W/(m2.℃)
Nominal conditions
R12(R134a)
JB/T7659.5—95
The nominal refrigeration conditions of the evaporator shall be as specified in Table 3. Table 3
Inlet air parameters
Dry bulb temperature t
Wet bulb temperature
Evaporation temperature t.
Nominal heat rejection conditions of the air-cooled condenser shall be as specified in Table 4. Table 4
Inlet air temperature t1
Condensing temperature #
Outlet subcooling u
Inlet and outlet temperature difference
Facing wind speed, m/s
4.3.3 Structural parameters
The structural parameters of evaporator and air-cooled condenser shall be in accordance with the provisions of Table 5. Table 5
4.4 Design conditions
Outer diameter D.
Tube spacing S
The design conditions of evaporator and air-cooled condenser shall be in accordance with the provisions of Table 6. Arrangement
Equilateral or isosceles
Triangle
Preparation agent
5 Technical requirements
General requirements
Design pressure, MPa
Heat transfer coefficient K
Outlet superheat A
Facing wind speed, m/s
Pitch.
0.10~0.30
1.3～3.5
Maximum condensing temperature, ℃
Fin heat exchangers shall comply with the provisions of this standard and be manufactured according to drawings and technical documents approved by the prescribed procedures. Number of rows n
5.2 Materials
The main materials used for fin heat exchangers are shown in Table 7. Material
5.3 Processing requirements
JB/T7659.5—95
GB 699,GB 700,GB 708,GB 716,GB 5066,GB 8162GB1527,GB 2040,GB 2059
GB 3194,GB 3880,GB/T 3618
GB 5117
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 warped 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 fan used in the finned heat exchanger shall comply with the requirements of GB/T13274, and shall rotate flexibly without obstruction and operate smoothly. The motor of the fan of the finned heat exchanger shall be properly enclosed or completely enclosed to prevent moisture. 5.3.6 The gas-liquid header and the finned tube shall be unobstructed after welding. 5.3.7 The surface of the ferrous metal parts used in the finned heat exchanger shall be treated with anti-corrosion. 5.4 Machining tolerance requirements
5.4.1 The roundness tolerance of the pipe section of the elbow 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 unnoted tolerance of the surface size of the machined part shall comply with the m grade specified in GB/T1804. The unnoted tolerance of the non-machined surface size shall comply with the ℃ grade.
5.4.3 When the effective length of the heat transfer tube between the two plates of the finned heat exchanger is not more than 1m, the tolerance is ±4mm; when the effective length is more than 1m, the tolerance is ±6mm.
5.4.4 On the windward side of the finned heat exchanger, when the diagonal length is not more than 1m, the tolerance of the difference between the two diagonals is ±5mm; when the diagonal length is more than 1m, the tolerance of the difference between the two diagonals is ±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 finned heat exchanger shall not deform or leak. 5.5.2 Cleanliness
The inside of the finned heat exchanger shall be clean and dry, and the impurity content on the surface in contact with the refrigerant shall not exceed 200mg/m2. 5.5.3 Performance parameter test
Inspect according to the provisions of 6.7. The nominal cooling capacity of the evaporator shall meet the design requirements. Check according to the provisions of 6.7. The nominal heat rejection, air volume and input power of the air-cooled condenser shall meet the design requirements. 5.5.4 Insulation resistance requirements
The insulation resistance (cold state) of the live parts of the air-cooled condenser to the ground and to the non-live metal parts shall not be less than 2Mn. 5.5.5 Electrical strength requirements
The electrical insulation between the live parts and the non-live metal parts of the air-cooled condenser shall be able to withstand the electrical strength test, and shall not break down or flash over after 1 minute.
5.6 Appearance requirements
5.6.1 The fin surface shall not have defects such as corrosion, cracks, obvious scratches and abrasions, and the surface shall be clean and bright, without oil stains and other residues. 1486
JB/T7659.5--95
The defects such as bending and collision of the fins shall be corrected before leaving the factory. 5.6.2 The fin edge shall be straight, without burrs, flashing and cracks. 5.6.3 The inner and outer surfaces of the pipes should be clean and free of rust marks. The pipes should not have obvious deformations such as dents, bends, twists, etc. The pipe ends 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 finned heat exchanger should be clean and the paint should be smooth and uniform in color. 5.7 Completeness
5.7.1 The finned heat exchanger should have:
a, refrigerant liquid inlet joint;
refrigerant gas outlet joint;
fan (evaporator does not include fan).
5.8 Warranty period
If the user complies with the provisions shown in 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 the measurement shall be carried out item by item according to the requirements of 5.4.
6.3 Pressure test
6.3.1 After the finned heat exchanger 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 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 air 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 air 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 shall be 1.5 to 2 times of the test pressure, the diameter of the pressure gauge dial shall not be less than 100mm, and the accuracy of the pressure gauge shall not be less than Class 1.5. 6.3.5 After the pressure test, the residual water vapor in the tube shall be removed and dried. 6.3.6 After the manufacture of each finned heat exchanger, it shall be filled with positive pressure dry nitrogen or specially treated dry air (with a dew point below -30°C), with a maximum pressure not exceeding 0.1MPa, and immediately sealed. 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 live parts and non-live metal parts of air-cooled condenser, test voltage is 1000V+2 times rated voltage, test time is 1min, no breakdown and flashover. When there are no problems in a large number of tests on the same product, it is allowed to use 120% test voltage, which lasts for 1s instead of the above test. When the motor and other electrical components have been tested for electrical strength, their terminals can be disconnected for this test. 6.6 Cleanliness inspection
Pressure flushing is carried out in the product pipe cluster with trichloroethylene for 5 minutes. The flushing pressure must ensure that the dirt can be effectively washed away. Filter the cleaning liquid with a 38μm filter. The filter is dried in a drying oven at 105±5℃ before and after filtering and the weight is measured. The difference between the two measured weights is the product cleanliness.
6.7 Performance parameter test
JB/T7659.5—95
The performance parameter test of finned heat exchanger can be carried out by industrial test or according to relevant standards. The test report shall at least provide the following data: a.
Model of finned heat exchanger;
Refrigerant used:
Air volume of finned heat exchanger fan, m/h; Input power of each motor, W, Voltage used, V; Current, A, Dry bulb temperature at the inlet of finned heat exchanger, ℃; Wet bulb temperature at the inlet of finned heat exchanger, ℃; Dry bulb temperature at the outlet of finned heat exchanger, ℃, Wet bulb temperature at the outlet of finned heat exchanger, ℃; Temperature of refrigerant entering finned heat exchanger, C, pressure, MPa Temperature of refrigerant leaving finned heat exchanger, ℃, pressure, MPa, Total cooling capacity, kW;
Atmospheric pressure of the test room, Pa.
7 Inspection rules
·General requirements
Finned heat exchangers shall be inspected by the manufacturer's technical inspection department in accordance with this standard and technical documents, and only qualified ones can be shipped out of the factory. 7.2 Inspection items
7.2.1 Inspection classification
The inspection of finned heat exchangers is divided into factory inspection and type inspection. 7.2.2 Inspection items
The inspection items of finned heat exchangers shall be in accordance with the provisions of Table 8. Table 8
Inspection Items
Performance Test
Cleanliness
Processing Quality
Appearance Quality
Air Pressure Test
Insulation Resistance (Referring to Wind-cooled Condenser)
Electrical Strength (Referring to Air-cooled Condenser)
Product Completeness
Product Label Content and Factory Documents
7.3 Factory Inspection
Factory Inspection
Each finned heat exchanger shall be subject to factory inspection after manufacture. 7.4 Type Inspection
Type Inspection
7.4.1 Type inspection shall be conducted on at least one specification of new products or old products that have undergone major reforms of finned heat exchangers. 7.4.2 The test method for performance test may adopt industrial operation test or relevant standard test. 1488
JB/F7659.5-95
7.4.3 The internal cleanliness and moisture of the finned heat exchanger should be implemented by strict process assurance. 8 Marking, packaging and storageWww.bzxZ.net
8.1 Marking
8.1.1 Each finned heat exchanger 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 and factory number:
Design pressure, test pressure;
Refrigerant used:
Heat exchange area,
Total air volume and air pressure of the fan,
Total power and electrical system:
Manufacturer name and trademark;
Weight:
Manufacture date.
The fan should indicate the direction of rotation.
8.2 Packaging
8.2.1 The finned heat exchanger should be covered with a plastic film layer, and the packaging layer should have appropriate rigidity. The finned heat exchanger should be properly fixed to prevent collision and damage to the fins.
8.2.2 The inner cavity of the finned heat exchanger should be filled with fluorine gas with a pressure not higher than 0.1MPa, and the pipe opening should be sealed tightly. 8.2.3 When the finned heat exchanger is supplied separately from the factory, the following technical documents should be accompanied: a. Product certificate;
b. Product manual;
Packing list.
8.3 Storage
The finned heat exchanger should be stored in a warehouse without corrosive gas, good ventilation and dryness. Additional remarks:
This standard was proposed and managed 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 Lü Linquan, Shen Hesheng and Mao Yongnian.1 Finned heat exchangers should have:
a, refrigerant liquid inlet connector;
refrigerant gas outlet connector;
fan (evaporator does not include fan).
5.8 Warranty period
If the user complies with the provisions of 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 in accordance with the requirements of 5.6. 6.2 Processing tolerance inspection
The processing tolerance inspection shall be carried out using a length measuring tool with a qualified measurement and a minimum graduation value of not less than 1mm, and measured item by item in accordance with the requirements of 5.4.
6.3 Pressure test
6.3.1 After the finned heat exchanger 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 shall not be lower than 5°C during the test. 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 shall be 1.5 to 2 times the test pressure, the diameter of the pressure gauge dial shall not be less than 100mm, and the accuracy of the pressure gauge shall not be lower than Class 1.5. 6.3.5 After the pressure test, the residual water vapor in the pipe shall be removed and dried. 6.3.6 After the manufacture of each finned heat exchanger is completed, it should be filled with positive pressure dry nitrogen or specially treated dry air (dew point is less than -30°C), the maximum pressure shall not exceed 0.1MPa, and it shall 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-cooled condenser, the test voltage is 1000V+2 times the rated voltage, the test time is 1min, and there is no breakdown or flashover. When there are no problems in the large number of tests of the same product, it is allowed to use 120% of the test voltage for 1s instead of the above test. When the motor and other electrical components have undergone electrical strength tests, their terminals can be disconnected in this test. 6.6 Cleanliness inspection
Pressure flush the product tube cluster with trichloroethylene for 5 minutes. The flushing pressure must ensure that the dirt can be effectively washed away. Filter the cleaning liquid with a 38μm 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
JB/T7659.5—95
The performance parameter test of the finned heat exchanger can be carried out by industrial test or according to relevant standards. The test report shall provide at least the following data: a.
Model of finned heat exchanger;
Refrigerant used:
Air volume of finned heat exchanger fan, m/h; Input power of each motor, W, Voltage used, V; Current, A, Dry bulb temperature at the inlet of finned heat exchanger, ℃; Wet bulb temperature at the inlet of finned heat exchanger, ℃; Dry bulb temperature at the outlet of finned heat exchanger, ℃; Wet bulb temperature at the outlet of finned heat exchanger, ℃; Temperature of refrigerant entering finned heat exchanger, C, pressure, MPa Temperature of refrigerant leaving finned heat exchanger, ℃, pressure, MPa, Total cooling capacity, kW;
Atmospheric pressure of the test room, Pa.
7 Inspection rules
·General requirements
Finned heat exchangers 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 after passing the inspection. 7.2 Inspection Items
7.2.1 Inspection Classification
The inspection of finned heat exchangers is divided into factory inspection and type inspection. 7.2.2 Inspection Items
The inspection items of finned heat exchangers shall be in accordance with the provisions of Table 8. Table 8
Inspection Items
Performance Test
Cleanliness
Processing Quality
Appearance Quality
Air Pressure Test
Insulation Resistance (Referring to Wind-cooled Condenser)
Electrical Strength (Referring to Air-cooled Condenser)
Complete Set of Products
Contents of Product Labels and Factory Documents
7.3 Factory Inspection
Factory Inspection
Each finned heat exchanger shall be subject to factory inspection after manufacture. 7.4 Type inspection
Type inspection
7.4.1 Type inspection shall be carried out on at least one specification of new products or old products that have undergone major reforms of finned heat exchangers. 7.4.2 The test method of performance test can adopt industrial operation test or relevant standard test. 1488
JB/F7659.5-95
7.4.3 The internal cleanliness and moisture of finned heat exchangers shall be implemented with strict process assurance. 8 Marking, packaging and storage
8.1 Marking
8.1.1 Each finned heat exchanger shall be fixed with a label in a conspicuous position. The label shall comply with the provisions of GB/T13306. The label content shall include:
Model, name and factory number:
Design pressure, test pressure;
Refrigerant used:
Heat exchange area,
Total air volume and air pressure of the fan,
Total power and electrical system:
Manufacturer name and trademark;
Weight:
Date of manufacture.
The direction of rotation of the fan shall be indicated.
8.2 Packaging
8.2.1 The finned heat exchanger shall be covered with a plastic film layer, and the packaging layer shall have appropriate rigidity. The finned heat exchanger shall be properly fixed to prevent collision and damage to the fins.
8.2.2 The inner cavity of the finned heat exchanger should be filled with fluorine gas at a pressure not higher than 0.1MPa, and the pipe opening should be sealed tightly. 8.2.3 When the finned heat exchanger is supplied separately from the factory, it should be accompanied by the following technical documents: a. Product certificate;
b. Product manual;
Packing list.
8.3 Storage
Finned heat exchangers should be stored in a warehouse without corrosive gas, good ventilation and dryness. Additional notes:
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. 14891 Finned heat exchangers should have:
a, refrigerant liquid inlet connector;
refrigerant gas outlet connector;
fan (evaporator does not include fan).
5.8 Warranty period
If the user complies with the provisions of 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 in accordance with the requirements of 5.6. 6.2 Processing tolerance inspection
The processing tolerance inspection shall be carried out using a length measuring tool with a qualified measurement and a minimum graduation value of not less than 1mm, and measured item by item in accordance with the requirements of 5.4.
6.3 Pressure test
6.3.1 After the finned heat exchanger 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 shall not be lower than 5°C during the test. 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 shall be 1.5 to 2 times the test pressure, the diameter of the pressure gauge dial shall not be less than 100mm, and the accuracy of the pressure gauge shall not be lower than Class 1.5. 6.3.5 After the pressure test, the residual water vapor in the pipe shall be removed and dried. 6.3.6 After the manufacture of each finned heat exchanger is completed, it should be filled with positive pressure dry nitrogen or specially treated dry air (dew point is less than -30°C), the maximum pressure shall not exceed 0.1MPa, and it shall 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-cooled condenser, the test voltage is 1000V+2 times the rated voltage, the test time is 1min, and there is no breakdown or flashover. When there are no problems in the large number of tests of the same product, it is allowed to use 120% of the test voltage for 1s instead of the above test. When the motor and other electrical components have undergone electrical strength tests, their terminals can be disconnected in this test. 6.6 Cleanliness inspection
Pressure flush the product tube cluster with trichloroethylene for 5 minutes. The flushing pressure must ensure that the dirt can be effectively washed away. Filter the cleaning liquid with a 38μm 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
JB/T7659.5—95
The performance parameter test of the finned heat exchanger can be carried out by industrial test or according to relevant standards. The test report shall provide at least the following data: a.
Model of finned heat exchanger;
Refrigerant used:
Air volume of finned heat exchanger fan, m/h; Input power of each motor, W, Voltage used, V; Current, A, Dry bulb temperature at the inlet of finned heat exchanger, ℃; Wet bulb temperature at the inlet of finned heat exchanger, ℃; Dry bulb temperature at the outlet of finned heat exchanger, ℃; Wet bulb temperature at the outlet of finned heat exchanger, ℃; Temperature of refrigerant entering finned heat exchanger, C, pressure, MPa Temperature of refrigerant leaving finned heat exchanger, ℃, pressure, MPa, Total cooling capacity, kW;
Atmospheric pressure of the test room, Pa.
7 Inspection rules
·General requirements
Finned heat exchangers 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 after passing the inspection. 7.2 Inspection Items
7.2.1 Inspection Classification
The inspection of finned heat exchangers is divided into factory inspection and type inspection. 7.2.2 Inspection Items
The inspection items of finned heat exchangers shall be in accordance with the provisions of Table 8. Table 8
Inspection Items
Performance Test
Cleanliness
Processing Quality
Appearance Quality
Air Pressure Test
Insulation Resistance (Referring to Wind-cooled Condenser)
Electrical Strength (Referring to Air-cooled Condenser)
Product Completeness
Product Label Content and Factory Documents
7.3 Factory Inspection
Factory Inspection
Each finned heat exchanger shall be subject to factory inspection after manufacture. 7.4 Type inspection
Type inspection
7.4.1 Type inspection shall be carried out on at least one specification of new products or old products that have undergone major reforms of finned heat exchangers. 7.4.2 The test method of performance test can adopt industrial operation test or relevant standard test. 1488
JB/F7659.5-95
7.4.3 The internal cleanliness and moisture of finned heat exchangers shall be implemented with strict process assurance. 8 Marking, packaging and storage
8.1 Marking
8.1.1 Each finned heat exchanger shall be fixed with a label in a conspicuous position. The label shall comply with the provisions of GB/T13306. The label content shall include:
Model, name and factory number:
Design pressure, test pressure;
Refrigerant used:
Heat exchange area,
Total air volume and air pressure of the fan,
Total power and electrical system:
Manufacturer name and trademark;
Weight:
Date of manufacture.
The direction of rotation of the fan shall be indicated.
8.2 Packaging
8.2.1 The finned heat exchanger shall be covered with a plastic film layer, and the packaging layer shall have appropriate rigidity. The finned heat exchanger shall be properly fixed to prevent collision and damage to the fins.
8.2.2 The inner cavity of the finned heat exchanger should be filled with fluorine gas at a pressure not higher than 0.1MPa, and the pipe opening should be sealed tightly. 8.2.3 When the finned heat exchanger is supplied separately from the factory, it should be accompanied by the following technical documents: a. Product certificate;
b. Product manual;
Packing list.
8.3 Storage
Finned heat exchangers should be stored in a dry warehouse with no corrosive gas, good ventilation. Additional notes:
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. 14895 Insulation electrical strength test
Electrical strength test between live parts and non-live metal parts of air-cooled condenser, test voltage is 1000V + 2 times rated voltage, test time is 1min, no breakdown and flashover. When there are no problems in a large number of tests on the same product, it is allowed to use 120% test voltage for 1s instead of 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. Filter the cleaning liquid with a 38μm filter. The filter is dried in a drying oven at 105±5℃ before and after filtering and the weight is measured. The difference between the two measured weights is the product cleanliness.
6.7 Performance parameter test
JB/T7659.5-95
The performance parameter test of finned heat exchanger can be carried out by industrial test or test according to relevant standards. The test report shall provide at least the following data: a.
Model of finned heat exchanger;
Refrigerant used:
Air volume of finned heat exchanger fan, m/h; Input power of each motor, W, Voltage used, V; Current, A, Dry bulb temperature at the inlet of finned heat exchanger, ℃; Wet bulb temperature at the inlet of finned heat exchanger, ℃; Dry bulb temperature at the outlet of finned heat exchanger, ℃; Wet bulb temperature at the outlet of finned heat exchanger, ℃; Temperature of refrigerant entering finned heat exchanger, C, pressure, MPa Temperature of refrigerant leaving finned heat exchanger, ℃, pressure, MPa, Total cooling capacity, kW;
Atmospheric pressure of the test room, Pa.
7 Inspection rules
·General requirements
Finned heat exchangers 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 after passing the inspection. 7.2 Inspection Items
7.2.1 Inspection Classification
The inspection of finned heat exchangers is divided into factory inspection and type inspection. 7.2.2 Inspection Items
The inspection items of finned heat exchangers shall be in accordance with the provisions of Table 8. Table 8
Inspection Items
Performance Test
Cleanliness
Processing Quality
Appearance Quality
Air Pressure Test
Insulation Resistance (Referring to Wind-cooled Condenser)
Electrical Strength (Referring to Air-cooled Condenser)
Complete Set of Products
Contents of Product Labels and Factory Documents
7.3 Factory Inspection
Factory Inspection
Each finned heat exchanger shall be subject to factory inspection after manufacture. 7.4 Type inspection
Type inspection
7.4.1 Type inspection shall be carried out on at least one specification of new products or old products that have undergone major reforms of finned heat exchangers. 7.4.2 The test method of performance test can adopt industrial operation test or relevant standard test. 1488
JB/F7659.5-95
7.4.3 The internal cleanliness and moisture of finned heat exchangers shall be implemented with strict process assurance. 8 Marking, packaging and storage
8.1 Marking
8.1.1 Each finned heat exchanger shall be fixed with a label in a conspicuous position. The label shall comply with the provisions of GB/T13306. The label content shall include:
Model, name and factory number:
Design pressure, test pressure;
Refrigerant used:
Heat exchange area,
Total air volume and air pressure of the fan,
Total power and electrical system:
Manufacturer name and trademark;
Weight:
Date of manufacture.
The direction of rotation of the fan shall be indicated.
8.2 Packaging
8.2.1 The finned heat exchanger shall be covered with a plastic film layer, and the packaging layer shall have appropriate rigidity. The finned heat exchanger shall be properly fixed to prevent collision and damage to the fins.
8.2.2 The inner cavity of the finned heat exchanger should be filled with fluorine gas at a pressure not higher than 0.1MPa, and the pipe opening should be sealed tightly. 8.2.3 When the finned heat exchanger is supplied separately from the factory, it should be accompanied by the following technical documents: a. Product certificate;
b. Product manual;
Packing list.
8.3 Storage
Finned heat exchangers should be stored in a dry warehouse with no corrosive gas, good ventilation. Additional notes:
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. 14895 Insulation electrical strength test
Electrical strength test between live parts and non-live metal parts of air-cooled condenser, test voltage is 1000V + 2 times rated voltage, test time is 1min, no breakdown and flashover. When there are no problems in a large number of tests on the same product, it is allowed to use 120% test voltage for 1s instead of 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. Filter the cleaning liquid with a 38μm filter. The filter is dried in a drying oven at 105±5℃ before and after filtering and the weight is measured. The difference between the two measured weights is the product cleanliness.
6.7 Performance parameter test
JB/T7659.5-95
The performance parameter test of finned heat exchanger can be carried out by industrial test or test according to relevant standards. The test report shall provide at least the following data: a.
Model of finned heat exchanger;
Refrigerant used:
Air volume of finned heat exchanger fan, m/h; Input power of each motor, W, Voltage used, V; Current, A, Dry bulb temperature at the inlet of finned heat exchanger, ℃; Wet bulb temperature at the inlet of finned heat exchanger, ℃; Dry bulb temperature at the outlet of finned heat exchanger, ℃; Wet bulb temperature at the outlet of finned heat exchanger, ℃; Temperature of refrigerant entering finned heat exchanger, C, pressure, MPa Temperature of refrigerant leaving finned heat exchanger, ℃, pressure, MPa, Total cooling capacity, kW;
Atmospheric pressure of the test room, Pa.
7 Inspection rules
·General requirements
Finned heat exchangers 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 after passing the inspection. 7.2 Inspection Items
7.2.1 Inspection Classification
The inspection of finned heat exchangers is divided into factory inspection and type inspection. 7.2.2 Inspection Items
The inspection items of finned heat exchangers shall be in accordance with the provisions of Table 8. Table 8
Inspection Items
Performance Test
Cleanliness
Processing Quality
Appearance Quality
Air Pressure Test
Insulation Resistance (Referring to Wind-cooled Condenser)
Electrical Strength (Referring to Air-cooled Condenser)
Complete Set of Products
Contents of Product Labels and Factory Documents
7.3 Factory Inspection
Factory Inspection
Each finned heat exchanger shall be subject to factory inspection after manufacture. 7.4 Type inspection
Type inspection
7.4.1 Type inspection shall be carried out on at least one specification of new products or old products that have undergone major reforms of finned heat exchangers. 7.4.2 The test method of performance test can adopt industrial operation test or relevant standard test. 1488
JB/F7659.5-95
7.4.3 The internal cleanliness and moisture of finned heat exchangers shall be implemented with strict process assurance. 8 Marking, packaging and storage
8.1 Marking
8.1.1 Each finned heat exchanger shall be fixed with a label in a conspicuous position. The label shall comply with the provisions of GB/T13306. The label content shall include:
Model, name and factory number:
Design pressure, test pressure;
Refrigerant used:
Heat exchange area,
Total air volume and air pressure of the fan,
Total power and electrical system:
Manufacturer name and trademark;
Weight:
Date of manufacture.
The direction of rotation of the fan shall be indicated.
8.2 Packaging
8.2.1 The finned heat exchanger shall be covered with a plastic film layer, and the packaging layer shall have appropriate rigidity. The finned heat exchanger shall be properly fixed to prevent collision and damage to the fins.
8.2.2 The inner cavity of the finned heat exchanger should be filled with fluorine gas at a pressure not higher than 0.1MPa, and the pipe opening should be sealed tightly. 8.2.3 When the finned heat exchanger is supplied separately from the factory, it should be accompanied by the following technical documents: a. Product certificate;
b. Product manual;
Packing list.
8.3 Storage
Finned heat exchangers should be stored in a dry warehouse with no corrosive gas, good ventilation. Additional notes:
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. 14893 Storage
Finned heat exchangers should be stored in a dry, well-ventilated warehouse without corrosive gases. Additional Notes:
This standard was proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Air Conditioning Factory and Nanjing Wuzhou Refrigeration (Group) Company. The main drafters of this standard are Lv Linquan, Shen Hesheng and Mao Yongnian. 14893 Storage
Finned heat exchangers should be stored in a dry, well-ventilated warehouse without corrosive gases. Additional Notes:
This standard was proposed and managed by the Hefei General Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Air Conditioning Factory and Nanjing Wuzhou Refrigeration (Group) Company. The main drafters of this standard are Lv Linquan, Shen Hesheng and Mao Yongnian. 1489
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.