Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T7769-95
Dehumidifier
Published on June 16, 1995
Ministry of Machinery Industry of the People's Republic of China
Implemented on July 1, 1996
Mechanical Industry Standard of the People's Republic of China
Dehumidifier
Subject Content and Scope of Application
JB/T7769-95
Replaces ZBJ73004.1~, 3-88
This standard specifies the terminology, type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of dehumidifiers. This standard applies to integral dehumidifiers (hereinafter referred to as dehumidifiers) with a nominal dehumidification capacity of 0.16 to 40 kg/h by mechanical refrigeration. | |tt | 275
GB/T13 306
JB/T3548
JB/T4119
JB4330
JB/T6917
ZBJ73027
3 Terminology
Packaging, storage and transportation pictorial symbols
Electrical and acoustic performance and test methods of sound level metersSafety requirements for room air conditioner electrical equipment
Transport packaging delivery and receipt symbols
Work Industrial difluoromethane (F1)
Industrial difluoromonooxymethane (F22)
Noise sound power level limits for power air compressors and diaphragm compressorsGeneral provisions for industrial product instruction manuals
Totally enclosed piston refrigeration compressors
Technical conditions for small piston single-stage refrigeration compressorsTechnical conditions for medium-sized piston single-stage refrigeration compressorsTechnical conditions for general-purpose centrifugal fans
R12, R22, R502 thermal expansion valves for refrigerationSolenoid valves for refrigeration
Determination of noise sound power level of refrigeration and air-conditioning equipmentEngineering method
Pressure vessels for refrigeration equipment
General provisions for determination of cleanliness of refrigeration equipment
3.1 Integrated dehumidifier
A dehumidifier that combines the refrigeration system and the air supply system (the dehumidifier with a nominal dehumidification capacity greater than 8kg/h may not include the air supply system) in one cabinet.
3.2 Nominal dehumidification capacity
The nominal value of the amount of condensed water when the dehumidifier is running for 1 hour under nominal working conditions, as indicated on the nameplate. 3.3 Dehumidification capacity
The amount of condensed water per hour under specified working conditions. 3.4 Dehumidification capacity per unit input power
The ratio of dehumidification capacity to total input power under nominal working conditions. Approved by the Ministry of Machinery Industry on June 16, 1995
Implemented on July 1, 1996
3.5 General type
JB/T7769-95
Dehumidifier in which the condensation heat of the refrigerant is completely taken away by the air flowing through the air-cooled condenser, and the outlet air temperature cannot be adjusted. 3.6 Temperature-adjustable type
Dehumidifier in which the condensation heat of the refrigerant can be completely or partially taken away by the cooling water of the water-cooled condenser, and the outlet air temperature can be adjusted. 3.7 Automatic type
Based on the general type or temperature-adjusting type, the dehumidifier has the function of automatically controlling the temperature or humidity of the conditioned space. Type and basic parameters
The structural type of the dehumidifier shall be as specified in Table 1. Table 1
The functional type of the dehumidifier shall be as specified in Table 2. Function
The temperature-adjusting type
The temperature applicable type of the dehumidifier shall be as specified in Table 3. Applicable temperature range
18~32℃
5~32℃
Model indication method
With fan
Without fan
With fan
Without fan
Non-automatic
Non-automatic
Power supply phase code, D is single-phase, three-phase is not indicated. Applicable temperature type code, Class A is not indicated.
Nominal dehumidification capacity, expressed in Arabic numerals, accurate to the tenth place, kg/h. Functional type code, structural type code is indicated according to the provisions of Table 2. Dehumidifier code is indicated according to the provisions of Table 1
JB/T7769-95
4.1.5 Model example
a. Nominal dehumidification capacity is 0.40kg/h, vertical with fan, generally non-automatic type, inlet air temperature is 5~32℃, single-phase power supply dehumidifier model: CF0.4BD:
b. Nominal dehumidification capacity is 20kg/h, vertical without fan, automatic temperature adjustment type, inlet air temperature is 18~32℃, three-phase power supply dehumidifier model: CTZ20.
4.2 Basic parameters
4.2.1 The nominal dehumidification capacity of the dehumidifier is determined according to the working conditions specified in Table 4. Table 4
Nominal working conditions
Dry bulb temperature
The nominal dehumidification capacity of the dehumidifier shall comply with the provisions of Table 5. Table 5
Technical requirements
Ball temperature
1 General requirements
Dehumidifiers shall comply with the requirements of this standard and be manufactured according to drawings and technical documents approved by the prescribed procedures. Atmospheric pressure kPa
5.2 Power supply
The power supply of the dehumidifier shall be an AC power supply with a single-phase voltage of 220V or a three-phase voltage of 380V and a frequency of 50Hz. 5.3 Temperature application range
The inlet air temperature of the dehumidifier shall comply with the provisions of Table 3; a.
b. The inlet water temperature of the water-cooled condenser of the thermostatic dehumidifier shall not be higher than 32℃. 1.2
5.4 Requirements for parts and components
5.4.1 The piston refrigeration compressor of the dehumidifier shall comply with the provisions of GB10079, GB10872 and GB10875, and other types of refrigeration compressors shall comply with the provisions of relevant standards. 5.4.2 The evaporator, condenser and liquid storage tank of the dehumidifier shall be manufactured in accordance with relevant regulations, and all pressure vessels shall also comply with the provisions of JB/T6917.
5.4.3 The fan, thermal expansion valve and solenoid valve of the dehumidifier shall comply with the provisions of GB/T13275, JB/T3548 and JB/T4119. 5.4.4 The dry filter and valve parts of the dehumidifier shall be manufactured in accordance with relevant standards. 5.4.5 The materials of the shell, frame and connecting pipes of the dehumidifier shall comply with the provisions of relevant material standards. 5.4.6 The electrical equipment and automatic control components of the dehumidifier shall comply with the provisions of relevant standards. 5.4.7 The coating of the painted parts of the dehumidifier shall be firm, uniform and of uniform color, and shall not have defects such as cracks, bubbles, flow marks, and variegated colors. 5.5 Insulation layer
The insulation layer of the dehumidifier should be firmly pasted, flat and clean, and its insulation material should be non-toxic, odorless, and self-extinguishing and non-deteriorating. 5.6 Refrigerant
The refrigerant used in the refrigeration system of the dehumidifier should comply with the provisions of GB7372 and GB7373 for first-class products. 5.7 Assembly
The connection of each component of the dehumidifier should be firm, and the refrigeration system should be sealed. There should be no leakage of refrigerant, water, oil, etc. 3
5.8 Performance requirements
5.8.1 Nominal dehumidification capacity
JB/T7769-95
The dehumidification capacity measured under nominal working conditions of the dehumidifier should not be less than 92% of the nominal dehumidification capacity. 5.8.2 Input power
The input power of the dehumidifier under nominal working conditions should not be greater than 110% of the rated input power. 5.8.3 Dehumidification capacity per unit input power
The dehumidification capacity per unit input power of the dehumidifier shall not be less than 95% of the value specified in Table 6. Table 6
Nominal dehumidification capacity kg/h
Maximum load operation
Dehumidification capacity per unit input power kg/(h·kW) with fan
without fan
When the voltage of the dehumidifier is 90% and 110% of the rated voltage under the maximum load condition, it shall be able to start and work normally. The overload protector shall not operate during the continuous operation of 2h, but it is allowed to operate once within 5min after stopping for 3min and then restarting, and then operate continuously for 1h. Low temperature operation
When the dehumidifier is operated under low temperature conditions, it shall meet the following requirements: a.
There shall be no water droplets blown out of the air outlet;
After the operation is completed, there shall be no frost on the windward side of the evaporator; for dehumidifiers equipped with automatic defrosting devices, the defrosting time shall not exceed 30% of the complete test cycle. Condensation removal
When the dehumidifier is operated under various test conditions, it shall have the ability to remove condensation. For dehumidifiers with automatic shutdown devices, the automatic shutdown device shall operate accurately, and no water shall overflow or blow out from any part other than the drain outlet. 5.9 Noise
The noise value (sound pressure level) of the dehumidifier shall not exceed the specified value in Table 7, and the data of the sound power level shall be provided. The noise of the dehumidifier without a fan shall not be assessed.
Nominal dehumidification capacity kg/h
Noise dB(A)
JB/T7769-95
5.10 Cleanliness
The evaporator, condenser, liquid storage tank and pipe in the refrigeration system of the dehumidifier shall be clean, and the impurity content shall not exceed 400mg/m3 calculated based on the internal surface area.
5.11 Safety requirements
5.11.1 The anti-electric shock protection measures, leakage current, grounding, heating, moisture-proof and abnormal operation requirements of the dehumidifier using a single-phase power supply shall comply with the relevant provisions of GB5956. 5.11.2 The insulation resistance of the live parts of the dehumidifier to the non-live metal parts shall not be less than 2MQ. 5.11.3 The dehumidifier should be able to withstand the electrical strength test for 1 minute and should not break down or flash over. 5.11.4 For dehumidifiers equipped with condensate treatment containers, when the water overflows artificially, the insulation resistance should be not less than 1M. 5.12 Operation requirements
Before leaving the factory, each dehumidifier should be able to operate normally under conditions close to the nominal operating conditions, the safety protection device should be sensitive and reliable, and the temperature and humidity controllers and electrical control components should operate correctly. 5.13 Refrigerant charging regulations
Dehumidifiers with a nominal dehumidification capacity of less than 20kg/h should be filled with refrigerant according to the rated amount before leaving the factory; dehumidifiers with a nominal dehumidification capacity greater than or equal to 20kg/h should be filled with 0.03~0.1MPa (gauge pressure) of dry coal-dried nitrogen before leaving the factory. 5.14 Appearance
Each dehumidifier should be inspected for appearance before leaving the factory for packaging. The frame, shell, etc. should not be deformed, and the paint and electroplating surfaces should not be scratched. 5.15 Quality assurance period
If the user complies with the provisions of the product manual, the manufacturer shall repair or replace the dehumidifier free of charge within 18 months from the date of shipment from the manufacturer if the dehumidifier is damaged or fails to work normally due to poor manufacturing quality. 6 Test method
6.1 Sealing test
The sealing test of the dehumidifier includes air pressure leak test and refrigerant charging leak test. 6.1.1 Air pressure leak test
Fill the system with dry air or dry nitrogen, and the charging pressure (gauge pressure) shall be as specified in Table 8. After maintaining the pressure for 1 hour, use a soapy water solution or other methods to check each joint. There should be no leakage. Refrigerant
Test pressure value
6.1.2 Refrigerant filling hysteresis test
Evacuate the system to an absolute pressure below 400Pa. If there is no pressure change within 5 minutes, fill the dehumidifier with the rated amount of refrigerant and check with an electronic halogen leak detector with a sensitivity higher than 14g/a. There should be no leakage. 6.2 Performance test
The performance test of the dehumidifier includes the dehumidification capacity test under nominal conditions, input power test, maximum load operation test, temperature resistance operation test and condensation water removal test.
6.2.1 Test conditions
The dehumidifier is tested under the conditions specified in Table 9 at rated voltage and rated frequency. The atmospheric pressure is 101.325kPa. 5
Nominal working condition
Maximum load working condition
Low temperature working condition
6.2.2 Nominal demixing capacity test
JB/T7769--95
Dry bulb temperature
The dehumidification capacity test method under nominal working condition shall comply with the provisions of Appendix A (Supplement). 6.2.3 Input power test
Wet bulb temperature
The dehumidification capacity test under nominal working condition shall be carried out simultaneously. The input power, voltage, current and power supply frequency of the dehumidifier shall be recorded every 20 minutes, and then the arithmetic mean shall be taken.
6.2.4 Maximum load operation test
Operate at rated frequency and 110% rated voltage. After reaching the maximum load working condition specified in Table 9, operate continuously for 2 hours, stop for 3 minutes, and then restart at 90% rated voltage and operate for 1 hour. 6.2.5 Low temperature operation test
At rated voltage and rated frequency, Class A dehumidifiers operate under low temperature condition A, and Class B dehumidifiers operate under low temperature condition B. After the operating conditions stabilize, the continuous operation time shall not be less than 4 hours. For dehumidifiers with automatic defrosting devices, the defrosting time shall not exceed 30% of the complete test cycle. 6.2.6 Condensation removal test
When conducting various performance tests, check the condensation removal capacity of the dehumidifier. For dehumidifiers with automatic devices, the test shall be carried out until they automatically stop.
6.3 Noise test
At rated voltage and rated frequency, measure the sound power level according to the nominal conditions specified in Table 9 and the method specified in JB4330, and calculate the sound pressure level according to Appendix A (reference) of GB7786. The value shall comply with the provisions of Table 7. 6.4 Cleanliness test
After the type inspection or sampling inspection of the dehumidifier, according to the provisions of 2BJ73027, the dedicated refrigerant liquid pipeline drying filter (38μm filter screen) shall be dismantled and cleaned, and the mass of the impurity content shall be weighed, and the value shall comply with the provisions of Article 5.10 (before the test, the manufacturer shall provide the sum of the internal surface areas of the evaporator, condenser, liquid receiver and connecting pipe of the inspected product). 6.5 Safety performance test
6.5.1 Insulation resistance test
According to the provisions of Article 16.2 of GB5956.
6.5.2 Electronic strength test
According to the provisions of Article 16.3 of GB5956.
6.5.3 Overflow insulation test
For dehumidifiers equipped with condensate treatment containers, stop the automatic shutdown device and operate at rated voltage and rated frequency. After reaching the nominal operating conditions specified in Table 9, continue to operate for 1 hour from the beginning of condensate overflow from the container, stop for 2 minutes, and measure with a 500V DC megohmmeter that the insulation resistance between the charged body and the non-charged metal body that is easily touched by people should not be less than 1MA. 6.6 Operation test
Continuously operate for 1 hour under conditions close to the nominal operating conditions (for dehumidifiers with a nominal dehumidification capacity of no more than 8.0kg/h, the operating time can be 20 minutes), measure its voltage, current, etc., and check the sensitivity and reliability of the safety protection device and the correctness of the actions of the temperature and humidity controller and electrical control components.
6.7 Appearance inspection
JB/T 7769-95
Visually inspect the appearance quality of the dehumidifier, which should comply with the provisions of Article 5.14. 6.8
Measuring instruments
All kinds of measuring instruments used in the test shall be accompanied by a metrological verification certificate within the effective period of use, and their accuracy shall comply with the provisions of Table 10. Table 10
Types of measuring instruments
Temperature measuring instruments
Pressure measuring instruments
Liquid flow measuring instruments
Air flow measuring instruments
Electrical measuring instruments
Speed measuring instruments
Noise measuring instruments
Time measuring instruments
Mass measuring instruments
Inspection rules
Instrument name
Glass mercury thermometer
Thermocouple thermometer
Differential temperature gauge
Pressure gauge
Electronic Pressure sensor
Barometer
Recording, indicating, integrating flow meter cylinder
Instrument for measuring static pressure of air duct
Indicating, integrating power meter
Ammeter
Voltmeter
Rated rate meter
Tachometer
Flash speed meter
Oscilloscope
Precision sound level meter of type 1 or above
Timer
Instrument accuracy
Pressure instrument: ±1% of the measured value, the minimum division of the instrument shall not exceed 2.5 times the specified accuracy. Barometer: ±0.1%
±1% of the measured value
±2.5Pa (the nozzle should comply with the provisions of relevant standards) is ±0.5% of the measured value
is ±1% of the measured value
Should comply with the provisions of GB3785
is ±0.1% of the measured value
is ±0.2% of the measured value
7.1 General requirements
Each dehumidifier shall be inspected by the inspection department of the manufacturer in accordance with this standard and technical documents before it can be shipped out of the factory. 7.2 Inspection classification
The inspection of dehumidifiers is divided into factory inspection, type inspection and sampling inspection. The inspection items are in accordance with the provisions of Table 11. Table 11
Inspection items
Sealing
Protection measures against electric shock
Leakage current
Grounding device
Insulation resistance
Electrical strength
Factory inspection
Type inspection
Sampling inspection
Technical requirements Articles
Article 5.11.1
Article 5.11.2
5.11.3 articles
Articles of this standard
GB5956 Chapter, Article
Chapter 8
Chapter 14
Chapter 23
Inspection items
Nominal dehumidification capacity
Input power
Cleanliness
Maximum load operation
Low temperature operation
Condensate removal
Overflow insulation performance
Abnormal operation
7.2.2 Factory inspection
Factory inspection
Type inspection
JB/T7769—95
Continued Table 11
Sampling inspection
After the dehumidifier is assembled, the factory inspection shall be carried out according to the items specified in Table 11. 7.2.3 Type inspection
Technical requirements Article
Article 5.11.4
Article 5.11.1
Articles of this standard
GB5955 Chapter, Article
Chapter 12
Chapter 15
Chapter 17
When new products or finalized products have major changes that affect performance, they should be subject to type inspection according to the items specified in Table 11, and the time should not be less than 150 hours.
7.2.4 Sampling inspection
7.2.4.1 Products produced in batches should be subject to sampling inspection to check the stability of the production process. 7.2.4.2 The number of products of the same model within one year shall be regarded as an inspection batch, and the sampling time shall be evenly distributed throughout the year. If the annual output of the same model product is less than 30 units, it can be accumulated as an inspection batch, and samples are randomly selected from it. 7.2.4.3 Inspection plan: One sampling plan as specified in Table 12. Table 12
Batch N
51~100www.bzxz.net
Marking, packaging and purchase and storage
Sample size n
Qualified judgment number Ac
Unqualified judgment number Re
Each dehumidifier shall be fixed with a durable label in a conspicuous position on both sides or the back. The size and technical requirements of the label shall comply with the provisions of GB/T13306. The label shall be marked with the following contents: a.
Product model and name;
Main technical parameters (nominal dehumidification capacity, refrigerant code and injection amount, voltage, frequency, number of phases, total input power and weight); c.
Product factory number:
Manufacturer name;
Manufacture date.
JB/T 776995
8.1.2 The dehumidifier should be marked with signs indicating the working conditions, such as the arrow of the fan's rotation direction, the water inlet and outlet marks, and the indicator instruments and control buttons.
8.1.3 Each dehumidifier should have the product trademark fixed in a conspicuous position on the front. 8.2 Packaging
8.2.1 The dehumidifier should be cleaned before packaging, and all parts should be dry and clean. Rust-prone parts should be coated with rust-proof agents and filled with refrigerant or nitrogen according to the provisions of Article 5.13.
8.2.2 The dehumidifier should be firmly fixed in the packaging box and have reliable moisture-proof and vibration-proof measures. 8.2.3
The following accompanying documents should be attached to the packaging box. 8.2.3.1
Product certificate, including:
Product model and name;
Product factory number;
Product inspection results;
Inspector's signature;
Inspection date.
Product manual, including:
Manufacturer name;
Product model and name;
Product factory number;
Packing date;
Name and quantity of accompanying documents:
Name and quantity of accompanying factory documents;
Inspector's signature.
The shipping and receiving marks and storage and transportation marks should be clearly marked on the packaging box. 8.2.4.1
Shipment and receiving marks, including:
Name of the receiving station and receiving unit;
Product model and name;
Outer dimensions of the packaging box:
Gross weight, net weight:
Name of the shipping station and manufacturer.
Storage and transportation marks, including:
Handle with care;
Upward;
Afraid of moisture;
Number of stacking layers, etc.
Package shipment and receiving marks and storage and transportation marks shall comply with the relevant provisions of GB6388 and GB191. 8.3 Storage
The packaged dehumidifier should be stored in a dry and ventilated warehouse. A1 General requirements
JB/T7769-95
Appendix A
Dehumidification test method
(Supplement)
A1.1 The installation of the tested dehumidifier shall be in accordance with the provisions of the manufacturer's product manual. A1.2 The size of the test room shall meet the minimum distance between the dehumidifier and the surrounding walls of not less than 1m, and the minimum distance from the air outlet to the wall shall not be less than 1.8m. The test device shall be able to simulate the actual working state of the dehumidifier. The indoor air circulation shall ensure that the wind speed at 1m away from the dehumidifier does not exceed 0.5m/s. A1.3
The indoor air temperature sampling shall be 15cm away from the air inlet of the dehumidifier and shall not be affected by the exhaust or other heat sources of the tested dehumidifier. The temperature of the measuring point shall be representative of the temperature around the dehumidifier and similar to the conditions in actual use. The air velocity flowing through the wet-bulb thermometer shall be within 3.5~8m/s, with the best value being 5m/s. For dehumidifiers with temperature and humidity controllers, the temperature and humidity controllers should be stopped during the test. When testing a temperature-controlled dehumidifier, no cooling water is passed through the water-cooled condenser. Record the following data every 20 minutes:
inlet air dry-bulb temperature, C;
inlet air wet-bulb temperature, ℃;
input total power, kW;
input current, A;
voltage, V;
power frequency, Hz.
At the end of the test, the amount of condensed water collected during the test duration and the atmospheric pressure during the test should be recorded. A2 Calculation of test results
1 Calculation formula
The measured dehumidification capacity is calculated according to formula (A1):
[1+0.045(27-t)+0.022(60-)］
Wherein: G—measured dehumidification capacity under nominal conditions, kg/h; G, amount of condensed water collected during the test duration, kg; T-test recording duration, h;
t——average dry-bulb temperature of dehumidifier inlet air, ℃: 9 relative humidity (corrected by atmospheric pressure), %. Relative humidity is calculated according to formula (A2):
9=9[1+1.8603×10-3(101.325-B,)]Wherein: 9—measured relative humidity (according to the average value of the measured dry-bulb temperature), %; B, atmospheric pressure during the test, kPa.
A2.2 Calculation regulations
（AU)
·(A2)
A2.2.1 After the dehumidifier is running, record once every 20 minutes until the data recorded for four consecutive times are within the range specified in Table A1, and the working condition is determined to be stable. After the working condition is stable, record once every 20 minutes. For dehumidifiers with a nominal dehumidification capacity less than or equal to 1kg/h, the test record should last for 3 hours, and for other dehumidifiers, it should be 1 hour. The recorded data should all be within the range specified in Table A1. Take the arithmetic mean as the calculated value·and weigh the collected condensed water to calculate the dehumidification capacity under the nominal working condition according to formula (A1) and formula (A2). 102 The number of products of the same model within one year is regarded as an inspection batch, and the sampling time should be evenly distributed throughout the year. If the annual output of the same model product is less than 30 units, it can be accumulated as an inspection batch, and samples are randomly selected from it. 7.2.4.3 Sampling plan A single sampling plan as specified in Table 12 Table 12
Batch N
51~100
Marking, packaging and purchase and storage
Sample size n
Qualified judgment number Ac
Unqualified judgment number Re
Each dehumidifier should be fixed with a durable label in a conspicuous position on both sides or the back. The size and technical requirements of the label should comply with the provisions of GB/T13306. The following information should be marked on the label: a.
Product model and name;
Main technical parameters (nominal dehumidification capacity, refrigerant code and injection amount, voltage, frequency, number of phases, total input power and weight); c.
Product factory number:
Manufacturer name;
Manufacture date.
JB/T 776995
8.1.2 The dehumidifier should be marked with signs indicating the working conditions, such as the arrow of the fan rotation direction, the inlet and outlet marks, and the indicator instruments and control buttons.
8.1.3 Each dehumidifier should have the product trademark fixed in a conspicuous position on the front. 8.2 Packaging
8.2.1 The dehumidifier should be cleaned before packaging, and all parts should be dry and clean. Rust-prone parts should be coated with rust-proof agent, and refrigerant or nitrogen should be charged according to the provisions of Article 5.13.
8.2.2 The dehumidifier should be firmly fixed in the packaging box and have reliable moisture-proof and vibration-proof measures. 8.2.3
The following accompanying documents should be attached to the packaging box. 8.2.3.1
Product certificate, including:
Product model and name;
Product factory number;
Product inspection result;
Inspector's signature;
Inspection date.
Product manual, the content of which should comply with the relevant provisions of Appendix A (Supplement) of GB9969.1. The packing list shall include:
Manufacturer name;
Product model and name;
Product factory number;
Packing date;
Name and quantity of accompanying documents:
Name and quantity of accompanying factory documents;
Inspector's signature.
The shipping and receiving marks and storage and transportation marks shall be clearly marked on the packaging box. 8.2.4.1
The shipping and receiving marks shall include:
Name of the receiving station and the receiving unit;
Product model and name;
Outer dimensions of the packaging box:
Gross weight, net weight:
Name of the shipping station and manufacturer.
Storage and transportation marks shall include:
Handle with care;
Upward;
Afraid of moisture;
Number of stacking layers, etc.
The packaging receipt and delivery marks and storage and transportation marks shall comply with the relevant provisions of GB6388 and GB191. 8.3 Storage
The packaged dehumidifier should be stored in a dry and ventilated warehouse. A1 General requirements
JB/T7769-95
Appendix A
Dehumidification capacity test method
(Supplement)
A1.1 The installation of the tested dehumidifier shall be in accordance with the provisions of the manufacturer's product manual. A1.2 The size of the test room shall ensure that the minimum distance between the dehumidifier and the surrounding walls is not less than 1m, and the minimum distance from the air outlet to the additional wall is not less than 1.8m. The test device shall be able to simulate the actual working state of the dehumidifier. The indoor air circulation should ensure that the wind speed at 1m away from the dehumidifier does not exceed 0.5m/s. A1.3
The indoor air temperature should be sampled 15cm away from the air inlet of the dehumidifier and should not be affected by the exhaust or other heat sources of the dehumidifier being tested. The temperature at the measuring point should represent the temperature around the dehumidifier and be similar to the conditions in actual use. The air velocity flowing through the wet-bulb thermometer should be within 3.5-8m/s, with the optimal value being 5m/s. For dehumidifiers with temperature and humidity controllers, the temperature and humidity controllers should be stopped during the test. When testing a thermostatic dehumidifier, no cooling water is passed through the water-cooled condenser. Record the following data every 20 minutes:
Inlet air dry-bulb temperature, C;
Inlet air wet-bulb temperature, ℃;
Total input power, kW;
Input current, A;
Voltage, V;
Power frequency, Hz.
At the end of the test, the amount of condensed water collected during the test duration and the atmospheric pressure during the test should be recorded. A2 Calculation of test results
1 Calculation formula
The measured dehumidification capacity is calculated according to formula (A1):
[1+0.045(27-t)+0.022(60-)］
Wherein: G—measured dehumidification capacity under nominal conditions, kg/h; G, amount of condensed water collected during the test duration, kg; T-test recording duration, h;
t——average dry-bulb temperature of dehumidifier inlet air, ℃: 9 relative humidity (corrected by atmospheric pressure), %. Relative humidity is calculated according to formula (A2):
9=9[1+1.8603×10-3(101.325-B,)]Wherein: 9—measured relative humidity (according to the average value of the measured dry-bulb temperature), %; B, atmospheric pressure during the test, kPa.
A2.2 Calculation regulations
（AU)
·(A2)
A2.2.1 After the dehumidifier is running, record once every 20 minutes until the data recorded for four consecutive times are within the range specified in Table A1, and the working condition is determined to be stable. After the working condition is stable, record once every 20 minutes. For dehumidifiers with a nominal dehumidification capacity less than or equal to 1kg/h, the test record should last for 3 hours, and for other dehumidifiers, it should be 1 hour. The recorded data should all be within the range specified in Table A1. Take the arithmetic mean as the calculated value· and weigh the collected condensed water to calculate the dehumidification capacity under the nominal working condition according to formula (A1) and formula (A2). 102 The number of products of the same model within one year is regarded as an inspection batch, and the sampling time should be evenly distributed throughout the year. If the annual output of the same model product is less than 30 units, it can be accumulated as an inspection batch, and samples are randomly selected from it. 7.2.4.3 Sampling plan A single sampling plan as specified in Table 12 Table 12
Batch N
51~100
Marking, packaging and purchase and storage
Sample size n
Qualified judgment number Ac
Unqualified judgment number Re
Each dehumidifier should be fixed with a durable label in a conspicuous position on both sides or the back. The size and technical requirements of the label should comply with the provisions of GB/T13306. The following information should be marked on the label: a.
Product model and name;
Main technical parameters (nominal dehumidification capacity, refrigerant code and injection amount, voltage, frequency, number of phases, total input power and weight); c.
Product factory number:
Manufacturer name;
Manufacture date.
JB/T 776995
8.1.2 The dehumidifier should be marked with signs indicating the working conditions, such as the arrow of the fan rotation direction, the inlet and outlet marks, and the indicator instruments and control buttons.
8.1.3 Each dehumidifier should have the product trademark fixed in a conspicuous position on the front. 8.2 Packaging
8.2.1 The dehumidifier should be cleaned before packaging, and all parts should be dry and clean. Rust-prone parts should be coated with rust-proof agent, and refrigerant or nitrogen should be charged according to the provisions of Article 5.13.
8.2.2 The dehumidifier should be firmly fixed in the packaging box and have reliable moisture-proof and vibration-proof measures. 8.2.3
The following accompanying documents should be attached to the packaging box. 8.2.3.1
Product certificate, including:
Product model and name;
Product factory number;
Product inspection result;
Inspector's signature;
Inspection date.
Product manual, the content of which should comply with the relevant provisions of Appendix A (Supplement) of GB9969.1. The packing list shall include:
Manufacturer name;
Product model and name;
Product factory number;
Packing date;
Name and quantity of accompanying documents:
Name and quantity of accompanying factory documents;
Inspector's signature.
The shipping and receiving marks and storage and transportation marks shall be clearly marked on the packaging box. 8.2.4.1
The shipping and receiving marks shall include:
Name of the receiving station and the receiving unit;
Product model and name;
Outer dimensions of the packaging box:
Gross weight, net weight:
Name of the shipping station and manufacturer.
Storage and transportation marks shall include:
Handle with care;
Upward;
Afraid of moisture;
Number of stacking layers, etc.
The packaging receipt and delivery marks and storage and transportation marks shall comply with the relevant provisions of GB6388 and GB191. 8.3 Storage
The packaged dehumidifier should be stored in a dry and ventilated warehouse. A1 General requirements
JB/T7769-95
Appendix A
Dehumidification capacity test method
(Supplement)
A1.1 The installation of the tested dehumidifier shall be in accordance with the provisions of the manufacturer's product manual. A1.2 The size of the test room shall ensure that the minimum distance between the dehumidifier and the surrounding walls is not less than 1m, and the minimum distance from the air outlet to the additional wall is not less than 1.8m. The test device shall be able to simulate the actual working state of the dehumidifier. The indoor air circulation should ensure that the wind speed at 1m away from the dehumidifier does not exceed 0.5m/s. A1.3
The indoor air temperature should be sampled 15cm away from the air inlet of the dehumidifier and should not be affected by the exhaust or other heat sources of the dehumidifier being tested. The temperature at the measuring point should represent the temperature around the dehumidifier and be similar to the conditions in actual use. The air velocity flowing through the wet-bulb thermometer should be within 3.5-8m/s, with the optimal value being 5m/s. For dehumidifiers with temperature and humidity controllers, the temperature and humidity controllers should be stopped during the test. When testing a thermostatic dehumidifier, no cooling water is passed through the water-cooled condenser. Record the following data every 20 minutes:
Inlet air dry-bulb temperature, C;
Inlet air wet-bulb temperature, ℃;
Total input power, kW;
Input current, A;
Voltage, V;
Power frequency, Hz.
At the end of the test, the amount of condensed water collected during the test duration and the atmospheric pressure during the test should be recorded. A2 Calculation of test results
1 Calculation formula
The measured dehumidification capacity is calculated according to formula (A1):
[1+0.045(27-t)+0.022(60-)］
Wherein: G—measured dehumidification capacity under nominal conditions, kg/h; G, amount of condensed water collected during the test duration, kg; T-test recording duration, h;
t——average dry-bulb temperature of dehumidifier inlet air, ℃: 9 relative humidity (corrected by atmospheric pressure), %. Relative humidity is calculated according to formula (A2):
9=9[1+1.8603×10-3(101.325-B,)]Wherein: 9—measured relative humidity (according to the average value of the measured dry-bulb temperature), %; B, atmospheric pressure during the test, kPa.
A2.2 Calculation regulations
（AU)
·(A2)
A2.2.1 After the dehumidifier is running, record once every 20 minutes until the data recorded for four consecutive times are within the range specified in Table A1, and the working condition is determined to be stable. After the working condition is stable, record once every 20 minutes. For dehumidifiers with a nominal dehumidification capacity less than or equal to 1kg/h, the test record should last for 3 hours, and for other dehumidifiers, it should be 1 hour. The recorded data should all be within the range specified in Table A1. Take the arithmetic mean as the calculated value· and weigh the collected condensed water to calculate the dehumidification capacity under the nominal working condition according to formula (A1) and formula (A2). 101
Shipment and receiving marks, including:
Name of the receiving station and receiving unit;
Product model and name;
Outer dimensions of the packaging box:
Gross weight, net weight:
Name of the shipping station and manufacturer.
Storage and transportation marks, including:
Handle with care;
Upward;
Afraid of moisture;
Number of stacking layers, etc.
Package shipment and receiving marks and storage and transportation marks shall comply with the relevant provisions of GB6388 and GB191. 8.3 Storage
The packaged dehumidifier should be stored in a dry and ventilated warehouse. A1 General requirements
JB/T7769-95
Appendix A
Dehumidification test method
(Supplement)
A1.1 The installation of the tested dehumidifier shall be in accordance with the provisions of the manufacturer's product manual. A1.2 The size of the test room shall meet the minimum distance between the dehumidifier and the surrounding walls of not less than 1m, and the minimum distance from the air outlet to the wall shall not be less than 1.8m. The test device shall be able to simulate the actual working state of the dehumidifier. The indoor air circulation shall ensure that the wind speed at 1m away from the dehumidifier does not exceed 0.5m/s. A1.3
The indoor air temperature sampling shall be 15cm away from the air inlet of the dehumidifier and shall not be affected by the exhaust or other heat sources of the tested dehumidifier. The temperature of the measuring point shall be representative of the temperature around the dehumidifier and similar to the conditions in actual use. The air velocity flowing through the wet-bulb thermometer shall be within 3.5~8m/s, with the best value being 5m/s. For dehumidifiers with temperature and humidity controllers, the temperature and humidity controllers should be stopped during the test. When testing a temperature-controlled dehumidifier, no cooling water is passed through the water-cooled condenser. Record the following data every 20 minutes:
inlet air dry-bulb temperature, C;
inlet air wet-bulb temperature, ℃;
input total power, kW;
input current, A;
voltage, V;
power frequency, Hz.
At the end of the test, the amount of condensed water collected during the test duration and the atmospheric pressure during the test should be recorded. A2 Calculation of test results
1 Calculation formula
The measured dehumidification capacity is calculated according to formula (A1):
[1+0.045(27-t)+0.022(60-)］
Wherein: G—measured dehumidification capacity under nominal conditions, kg/h; G, amount of condensed water collected during the test duration, kg; T-test recording duration, h;
t——average dry-bulb temperature of dehumidifier inlet air, ℃: 9 relative humidity (corrected by atmospheric pressure), %. Relative humidity is calculated according to formula (A2):
9=9[1+1.8603×10-3(101.325-B,)]Wherein: 9—measured relative humidity (according to the average value of the measured dry-bulb temperature), %; B, atmospheric pressure during the test, kPa.
A2.2 Calculation regulations
（AU)
·(A2)
A2.2.1 After the dehumidifier is running, record once every 20 minutes until the data recorded for four consecutive times are within the range specified in Table A1, and the working condition is determined to be stable. After the working condition is stable, record once every 20 minutes. For dehumidifiers with a nominal dehumidification capacity less than or equal to 1kg/h, the test record should last for 3 hours, and for other dehumidifiers, it should be 1 hour. The recorded data should all be within the range specified in Table A1. Take the arithmetic mean as the calculated value·and weigh the collected condensed water to calculate the dehumidification capacity under the nominal working condition according to formula (A1) and formula (A2). 101
Shipment and receiving marks, including:
Name of the receiving station and receiving unit;
Product model and name;
Outer dimensions of the packaging box:
Gross weight, net weight:
Name of the shipping station and manufacturer.
Storage and transportation marks, including:
Handle with care;
Upward;
Afraid of moisture;
Number of stacking layers, etc.
Package shipment and receiving marks and storage and transportation marks shall comply with the relevant provisions of GB6388 and GB191. 8.3 Storage
The packaged dehumidifier should be stored in a dry and ventilated warehouse. A1 General requirements
JB/T7769-95
Appendix A
Dehumidification test method
(Supplement)
A1.1 The installation of the tested dehumidifier shall be in accordance with the provisions of the manufacturer's product manual. A1.2 The size of the test room shall meet the minimum distance between the dehumidifier and the surrounding walls of not less than 1m, and the minimum distance from the air outlet to the wall shall not be less than 1.8m. The test device shall be able to simulate the actual working state of the dehumidifier. The indoor air circulation shall ensure that the wind speed at 1m away from the dehumidifier does not exceed 0.5m/s. A1.3
The indoor air temperature sampling shall be 15cm away from the air inlet of the dehumidifier and shall not be affected by the exhaust or other heat sources of the tested dehumidifier. The temperature of the measuring point shall be representative of the temperature around the dehumidifier and similar to the conditions in actual use. The air velocity flowing through the wet-bulb thermometer shall be within 3.5~8m/s, with the best value being 5m/s. For dehumidifiers with temperature and humidity controllers, the temperature and humidity controllers should be stopped during the test. When testing a temperature-controlled dehumidifier, no cooling water is passed through the water-cooled condenser. Record the following data every 20 minutes:
inlet air dry-bulb temperature, C;
inlet air wet-bulb temperature, ℃;
input total power, kW;
input current, A;
voltage, V;
power frequency, Hz.
At the end of the test, the amount of condensed water collected during the test duration and the atmospheric pressure during the test should be recorded. A2 Calculation of test results
1 Calculation formula
The measured dehumidification capacity is calculated according to formula (A1):
[1+0.045(27-t)+0.022(60-)］
Wherein: G—measured dehumidification capacity under nominal conditions, kg/h; G, amount of condensed water collected during the test duration, kg; T-test recording duration, h;
t——average dry-bulb temperature of dehumidifier inlet air, ℃: 9 relative humidity (corrected by atmospheric pressure), %. Relative humidity is calculated according to formula (A2):
9=9[1+1.8603×10-3(101.325-B,)]Wherein: 9—measured relative humidity (according to the average value of the measured dry-bulb temperature), %; B, atmospheric pressure during the test, kPa.
A2.2 Calculation regulations
（AU)
·(A2)
A2.2.1 After the dehumidifier is running, record once every 20 minutes until the data recorded for four consecutive times are within the range specified in Table A1, and the working condition is determined to be stable. After the working condition is stable, record once every 20 minutes. For dehumidifiers with a nominal dehumidification capacity less than or equal to 1kg/h, the test record should last for 3 hours, and for other dehumidifiers, it should be 1 hour. The recorded data should all be within the range specified in Table A1. Take the arithmetic mean as the calculated value· and weigh the collected condensed water to calculate the dehumidification capacity under the nominal working condition according to formula (A1) and formula (A2). 10
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