This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of single-type train air-conditioning units. This standard applies to motor-driven compression unit-type air-cooled electric heating air-conditioning units with R22 as refrigerant installed on the top of ordinary railway passenger cars. Special passenger car air-conditioning units can also be used as a reference. JB/T 6420-1992 Unitary train air-conditioning unit JB/T6420-1992 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Unitary Train Air Conditioning Unit
1 Subject Content and Scope of Application
JB/T 6420-- 92
This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging and storage of unitary train air conditioning units (hereinafter referred to as air conditioning units).
This standard applies to the motor-driven compression unit type air-cooled electric heating air conditioning units with R22 as refrigerant installed on the top of ordinary railway passenger cars, and special passenger car air conditioning units can also be used for reference. 2 Reference standards
GB 190
GB 755
GB6388
GB7373
GB9237
Packaging, storage and transportation pictorial marking
Basic technical requirements for rotating electrical machines
Transport packaging receipt mark
Industrial chlorodifluoromethane
General technical specification for refrigeration equipment
GB 10079
Totally enclosed piston refrigeration compressors
GB/T 13306
Signage
GB3/T 13274
GB/T 13275
ZB J73 022
ZBJ73025
Technical conditions for general-purpose axial flow fans
Technical conditions for general-purpose centrifugal fans
Test methods for unitary air conditioners
Model compilation method for refrigeration machines
ZBJ73046
Technical conditions for unitary air conditioners
3 Type
3.1 Structural type of air-conditioning units
3.1.1 According to the appearance, they are divided into two types: flat bottom round neck and round bottom round top. 3.1.2 According to the air outlet mode, they are divided into two types: front air outlet and bottom air outlet. 3.2 In addition to complying with the provisions of ZBJ73025, the model compilation method of air-conditioning units shall also comply with the following provisions. KLD-
Air outlet mode, Q for front air outlet and X for bottom air outlet Air conditioning unit structure type: P for flat bottom and Y for round bottom Nominal cooling capacity: Indicated by Arabic numerals (integer), unit kW (see Tables 2-4) Code for electric heating train air conditioning unit
Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on July 20, 1992 964
Implemented on January 1, 1993
4
Model example:
KLD-40PQ
KLD-30PX
Basic parameters
JB/T6420—92
Indicates electric heating train air conditioning unit, with a nominal cooling capacity of 40.70kW, flat bottom, front air outlet. Indicates electric heating train air conditioning unit, with a nominal cooling capacity of 29.07kW, flat bottom, bottom air outlet. 4.1 The nominal cooling capacity assessment conditions of the air-conditioning unit shall be as specified in Table 1. Table 1
Nominal cooling capacity
Assessment conditions
Evaporator inlet air state!
Dry bulb temperature
29
Note: 1) Refers to the state after the return air and fresh air of the air-conditioning unit are mixed. 4.2 The basic parameters of the flat bottom front air-conditioning unit shall be as specified in Table 2. Table 2
Structural type code
PQ
Nominal cooling capacity
W
40700
29070
23260
Unit power
Cooling capacity
kw/kw
2.1
2.0
The basic parameters of the round bottom air-conditioning unit shall be as specified in Table 3. 4.3
Table 3
Nominal cooling capacity
Structural type code
Yx
W
10700
29070
Unit power
Cooling capacity
kw/kw
2.1
2.0
The basic parameters of the flat bottom air-conditioning unit shall be as specified in Table 4. 4.4
Table 4
Nominal cooling capacity
Structural type code
PX
W
40700
29070
Unit power
Cooling capacity
kw/kw
2.1
2. 0
Wet bulb temperature
23
Unit weight
Cooling capacity
W/kg
37
35
32
Unit weight
Cooling capacity
W/kg
37
35
Unit weight
Cooling capacity
W/kg
37
35
Air-cooled condenser inlet air status
Dry bulb temperature
35
Air volume
(High gear)
m*/h
6000
4500|| tt||3500
Air volume
(speed gear)
ma/h
6000
4500
Air volume
(commercial speed gear)
m/h
6000
4500
External static pressure
Pa
170~~200
External static pressure
Pa
98~150
External static pressure
Pa
340~382
Note: When the user requires the external static pressure of the air-conditioning unit to exceed the provisions of Table 2 to Table 4, the cooling capacity per unit power and the cooling capacity per unit weight shall be determined by agreement. 4.5 The power consumption of the air-conditioning unit includes the total power consumed by the compressor, evaporator fan, condenser fan and other components that are part of the air-conditioning unit.
4.6 The weight of the air-conditioning unit does not include the weight of the electrical control cabinet. 4.7 The allowable deviation of the measured cooling capacity of the air-conditioning unit under nominal working conditions is -5%, and the allowable deviation of the cooling capacity per unit power is -5%. 4.8 The main circuit of the air-conditioning unit is three-phase AC, with a rated voltage of 380V and a rated frequency of 50Hz. 965
5 Technical requirements
5.1 General requirements
JB/T 6420—92
The air-conditioning unit shall comply with the provisions of this standard and shall be manufactured according to the drawings and technical documents approved by the prescribed procedures or according to the agreement. 5.2 Conditions of use
5.2.1 The air-conditioning unit shall be able to operate normally under natural conditions when the ambient temperature is 45C. 5.2.2 The air-conditioning unit shall be able to operate normally under conditions such as vibration and impact during vehicle operation. 5.3 Requirements for parts and components
5.3.1 The piston refrigeration compressor of the air-conditioning unit shall comply with the provisions of GB10079 or relevant standards. And meet the relevant requirements of vehicle compressors.
5.3.2 The fan of the air-conditioning unit shall comply with the provisions of GB/T13274 and GB/T13275. 5.3.3 The motor of the air-conditioning unit shall comply with the provisions of GB755. 5.3.4 The refrigerant used in the air-conditioning unit shall comply with the provisions of GB7373. 5.3.5 The evaporator and condenser shall be manufactured in accordance with relevant regulations. All pressure vessels shall also comply with the provisions of relevant pressure vessel standards. 5.3.6 The electrical control system and components of the air-conditioning unit shall comply with the provisions of relevant standards. 5.3.7 The windproof and waterproof sealing gaskets and shock absorbers of the air-conditioning unit shall comply with the provisions of relevant standards. 5.3.8 The materials of the shell and all pipes of the air-conditioning unit shall comply with the requirements of relevant material standards. The shell should be flat and should not have cracks or welding defects.
5.3.9 The heat insulation layer of the air-conditioning unit shall be flame retardant, and the heat insulation layer shall be firmly pasted and flat. 5.4 Structural requirements
5.4.1 The drainage structure of the air-conditioning unit shall be reliable. Condensation water and rainwater shall not leak from the unit into the carriage during operation, and the centrifugal fan outlet shall not spray with water.
5.4.2 Fresh air inlets shall be set on both sides of the air-conditioning unit, and the opening size shall meet the requirements of the fresh air volume. Louvers shall be set at the fresh air inlet to prevent rainwater from entering the carriage from the fresh air inlet when the train is running, and the dust filter shall be easy to load and unload. 5.5 Assembly requirements
5.5.1 All internal components of the refrigeration system of the air-conditioning unit shall be kept clean and dry before assembly. 5.5.2 Necessary positioning measures shall be taken for each pipeline and component in the air-conditioning unit to ensure that no friction or collision occurs during transportation. 5.5.3 The connection of each component shall be firm and shall not leak water or oil. 5.5.4 The installation and layout of electrical circuits, electrical equipment and automatic control devices should be safe, firm and neat. 5.6 Performance requirements
5.6.1 Sealing
The air conditioning unit system should be firmly connected and refrigerant should not leak. 5.6.2 Insulation resistance
The insulation resistance of the live parts of the air conditioning unit to the ground and to the non-live metal parts should not be less than 2MQ. 5.6.3 Electrical strength
The electrical insulation between the live parts and non-live metal parts of the air conditioning unit should be able to withstand the electrical strength test and should not undergo breakdown or flashover after 1 minute.
5.6.4 Maximum load condition
The air-conditioning unit should be able to start and work normally under the maximum load condition and when the power supply voltage is -10% of the rated value. 5.6.5 Low-temperature working conditions
When the air-conditioning unit is operating under low-temperature working conditions, the air path of the evaporator should not be blocked by ice and frost, and the indoor air supply should be free of water droplets. 5.6.6 Condensation working condition
a. Condensation should not be blown out of the air conditioning unit. 966
b. Condensed water should be able to drain smoothly from the drainage hole. 5.6.7 Waterproof performance
JB/T 6420—92
When the air-conditioning unit is subjected to the spray waterproof performance test, there is no water leakage in the waterproof sealing area at the bottom of the air-conditioning unit. 5.6.8 Vibration resistance
After the vibration test or actual operation of the train, the air-conditioning unit's components should not be damaged, the fasteners should not be loose, and the performance should meet the requirements. 5.7 Safety protection
5.7.1 The refrigeration system of the air conditioning unit should be protected against overvoltage, undervoltage, differential pressure, overload and short circuit, high pressure, high temperature, lack of air, lack of phase, etc., and the operation should be sensitive and reliable.
5.7.2 The air conditioning unit should be reliably grounded.
5.7.3 Air conditioning units equipped with auxiliary electric heaters shall meet the following requirements. a. The electric heater should be installed firmly. When the electric heating element is photographed, it should not touch the metal parts of the air conditioning unit; b. The parts around the electric heater should have sufficient heat resistance. 5.8 Appearance quality
Each air conditioning unit should undergo an appearance inspection before leaving the factory. The frame, shell, etc. should not be deformed, and the paint should not be scratched. 5.9 Reliability
When the user correctly uses and stores the air conditioning unit in accordance with the product instructions, the manufacturer should ensure that its mean time between failures (MTBF) is not less than 1a.
5.10 Warranty period
As long as the user abides by the provisions in the product manual, within 18 months from the date of shipment from the manufacturer, the air conditioning unit is indeed damaged or inoperable due to poor manufacturing quality. During normal operation, the manufacturer should replace or repair it free of charge (excluding wearing parts). 6 Test methods
6.1
The test conditions are specified in Table 5.
Table 5
Operating conditions
Evaporator inlet air dry-bulb temperature
Evaporator inlet wet-bulb temperature
Condenser inlet air temperature||tt| |Nominal working condition
29
23
35
Maximum load condition
35
28
45| |tt||6.2 Working condition deviation and measuring instrument accuracy shall be in accordance with Article 4.2 of ZBJ73022. 6.3 Sealing test
a. Air pressure leak detection
low temperature working condition
20
14
20
condensation working condition
28
25
28
C
Fill the refrigeration system of the air conditioning unit with nitrogen gas with a pressure (gauge pressure) of 1.8MPa, and maintain the pressure for 1 hour without any change in pressure. Use soapy water or other methods to check that there should be no leakage at each joint.
b． Vacuum leak detection
Vacuum the refrigeration system of the air conditioning unit to an absolute pressure of 130Pa, and there will be no pressure change within 5 minutes. c. Refrigerant filling and leak detection
Under the condition that the absolute pressure in the refrigeration system of the air conditioning unit does not exceed 400Pa, the specified amount of refrigerant is charged into the air conditioning unit, and leak detection using a halogen lamp should comply with Article 5.6.1 Require. 6.4 Insulation resistance test
Use a 500V insulation resistance meter to measure the insulation resistance of the live parts of the air-conditioning unit to the non-live metal parts shall comply with the requirements of 5.6.2. 6.5 Electrical strength test
The test voltage (1000V + 2 times the rated voltage) applied between the live part and the non-charged metal part shall comply with the requirements of Article 5.6.3 967
.
JB/T 6420—92
When a large number of tests on the same product have no problems, it is allowed to use 120% test voltage for 1$ instead of the above test. If the motor factory has done a dielectric strength test, the motor terminals can be disconnected during this test. 6.6 Operation test
The air conditioning unit and the control cabinet should be operated continuously for 4 hours, and their voltage and current should be measured respectively. The safety protection device should be sensitive and reliable, without spray or water leakage.
6.7 Spray test
Evenly pour water with a pressure higher than 0.1MPa and a precipitation of not less than 200mm/h for not less than 5rmin, and its waterproof performance should comply with the requirements of 5.6.7.
6.8 Nominal refrigeration capacity test and unit input power refrigeration capacity test. The nominal refrigeration capacity test and unit input power refrigeration capacity test shall be in accordance with Articles 4.3.1.1 and 4.3.1.2 of ZBJ73022 respectively.
6.9 Static pressure test
The external static pressure test of the air conditioning unit shall be in accordance with Article 4.3.1.3 of ZBJ73022. 6.10 Maximum load condition test
a. Under the rated frequency and rated voltage, under the maximum load condition specified in Table 5, run continuously for 2 hours. b. After 2 hours of continuous operation, cut off all power to the air conditioning unit and stop for 3 minutes, then reconnect the power to start the compressor at 10% rated voltage. Should comply with the requirements of 5.6.4. 6.11 Low temperature test
The low temperature working condition test runs for 4 hours under the low temperature working conditions in Table 5 and shall comply with the requirements of 5.6.5. 6.12 Condensation working condition test
The condensation test runs for 4 hours under the condensation working condition in Table 5 and shall comply with the requirements of 5.6.6. 6.13 Vibration test
The vibration test of the refrigeration compressor in the air-conditioning unit shall be carried out in accordance with the requirements for fully enclosed compressors for vehicles. The vibration test of the entire air-conditioning unit shall be carried out on a vibration test bench according to Appendix A (Supplement) of this standard or The actual operation assessment on the train should comply with the requirements of Article 5.6.8. 6.14 Thermal characteristic test
The air-conditioning unit should have a full performance curve obtained from the test, that is, the air-conditioning unit should be measured at different indoor air inlet wet bulb temperatures and outdoor air inlet dry bulb temperatures. Refrigeration capacity and input power. The indoor side air inlet working conditions are no less than 5 points, and the outdoor side air inlet working conditions are no less than 2 points. 7 Inspection Rules
7.1 General Provisions
Each air-conditioning unit must be inspected by the inspection department of the manufacturer in accordance with this standard and relevant standards and technical documents, and must be accompanied by a product certificate before leaving the factory.
7.2 Inspection Categories
The inspection of air conditioning units is divided into factory inspection, type inspection and sampling inspection. The test method shall be as specified in Chapter 6. 7.3 Factory inspection
Each air-conditioning unit shall undergo factory inspection in accordance with the provisions of 6.3~6.7 before leaving the factory. 7.4 Type inspection
Trial products of air conditioning units shall undergo type inspection after passing the factory test. The reliability test is conducted in the form of actual train operation and field recording.
The trial production of each type of air-conditioning unit shall undergo a type inspection of not less than 150 hours in total in accordance with the provisions of Article 6.86.14, and shall pass the appraisal. When there is a major structural reform of the air-conditioning unit, the type inspection shall be carried out again. , and conduct industrial experiments to test the 968
effect of the reform.
7.5 Sampling inspection
JB/T 6420--92
7.5.1: Air-conditioning units should be selected from products that have passed the factory inspection and inspected in accordance with Articles 6.8 and 6.9, 7.5 .2
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 in 1a. 7.5.3 The inspection plan for each type of air conditioning unit normally produced in batches shall be based on the one-time sampling plan specified in Table 6. Table 6
Batch
S50
>50～100
>100～500
>500
7.6 Reliability Criteria| |tt||Sample size n
3
5
8
Qualification number A.
0
1
2
7.6.1 After the air-conditioning unit is tested according to the requirements of Article 6.13, if the following conditions occur, it will be deemed to have failed the test. Breakage of any parts (including all accessories and mounting bolts); b.
c.
d.
e.
t.
7.6.2
Any parts are detached from the unit;
Unstable operation, abnormal sound, main unit damage, etc.; refrigerant leakage;
Electrical equipment short circuit, open circuit or breakdown;
Number of unqualified judgment R.
1
2
3
The shell and parts are deformed, affecting the normal operation of the equipment. For air-conditioning units that fail the reliability test, the manufacturer should take improvement measures and retest until they are qualified. 8 Marking, packaging and storage
8.1 Marking
Unit
8.1.1 Each air-conditioning unit should have a durable nameplate fixed in a conspicuous position. The size and technical requirements of the nameplate shall comply with the provisions of GB/T13306. The nameplate shall indicate the following contents: a.
Manufacturer name;
Product model and name;
b.bZxz.net
Quantity),
d.
e.
8. 1. 2
Marking.
Main technical performance parameters (cooling capacity, heating capacity, refrigerant code and its charging amount, voltage, frequency, number of phases, total power and product factory number;
Year and month of manufacture.
The air-conditioning unit shall have signs indicating the working conditions (such as arrows indicating the direction of rotation of the fan), indicating instruments and control buttons. 8.2 Factory documents
Each air-conditioning unit shall be accompanied by the following technical documents when leaving the factory. 8.2.1 Product certificate, The contents include: a.
b.
c.
d.
e.
8.2.2
Product model and name;
Product factory number;
Inspection and trial operation conclusion;
Inspector's signature and official seal;
Inspection date.
Product manual, the contents include:
969
JB/T 6420—92
Product model and name, applicable scope, thermal characteristic curve, etc.; product structure schematic diagram, refrigeration system diagram, circuit diagram and wiring diagram; b.
Installation instructions and requirements.
d.
e.
Spare parts catalog;
Instructions for use, maintenance and servicing precautions. 8.2.3 Packing list
8.3 Packaging
8.3.1 The air-conditioning unit should be cleaned and charged with the rated amount of refrigerant before packaging. All parts should be clean and dry, and rust-prone parts should be coated with rust inhibitor.
8.3.2
8.3.3
a.
b.
c.
d.||t t||e
f.
The air-conditioning unit should be covered with a plastic bag and fixed in the box to avoid moisture and mechanical damage during transportation. The following marks should be on the air-conditioning unit packaging box: shipping station and manufacturer's name;
arrival station and consignee's name;
product model and name;
net weight and gross weight;
outer dimensions;
"handle with care", "upward", "afraid of moisture" and number of stacking layers and other related packaging, storage and transportation marks. The packaging marks should comply with the relevant provisions of GB6388 and GB191.
8.4 Storage
The packed air-conditioning unit should be stored in a well-ventilated warehouse. 970
A1Scope of application
JB/T 6420—92
Appendix A
Moving test method for unit-type train air-conditioning units (supplement)
This appendix specifies the method for conventional vibration test (hereinafter referred to as vibration test) of train air-conditioning units on a vibration test bench. A2 Terminology
A2.1 Resonance test
It is a test to check whether certain parts and components in the air-conditioning unit produce resonance, and to find out the resonance frequency if resonance occurs. A2.2 Vibration performance test
It is a test to compare the performance of parts and components when vibration is applied and when vibration is not applied. A2.3 Vibration durability test
It is a test to test the durability of the air-conditioning unit under vibration. A3 Test conditions
A3.1 For air-conditioning units that cannot be tested separately or parts and components weighing more than 100kg, their individual components can be subjected to vibration tests.
A3.2 Test sequence: First do the resonance test, then do the vibration durability test, but the resonance test and the vibration performance test can be combined and carried out at the same time. A3.3 Air conditioning unit installation: The installation method and status on the test bench should be as similar as possible to the actual vehicle installation situation. A3.4 Air conditioning unit status: The air conditioning unit should be checked to be in good condition and can work normally. During the test, the air conditioning unit does not work, but when doing the vibration endurance test, the working conditions of the air conditioning unit before and after the test should be compared. A3.5 Method of applying vibration
Apply single vibration in any order in the three vertical directions of front, back, left, right, and top and bottom of the actual installation state of the air conditioning unit. The so-called front, back, left, right, and top and bottom directions refer to the directions that are the same as the front, back, left, right, and top and bottom directions of the vehicle body when the air conditioning unit is installed on the vehicle body. A4 Test method
A4.1 Resonance test
A4.1.1 Make the frequency rise or fall continuously within the frequency range shown in Table A1. Table Al
Type
1
2
Class
Note: The full amplitude of acceleration is twice the acceleration value. Frequency range, Hz
1～5
5~30
1~~5
5~30
Vibration size
Full amplitude 5mm
Full amplitude of acceleration 0.5g (4.90m/s2)Full amplitude 10mm
Full amplitude of acceleration 1g (9.81m/s2)
A4.1.2 The frequency change speed should be controlled to a level that does not cause the resonant frequency to be missed. A4.1.3 The time required for one round trip between the lowest and highest frequencies should be long enough so that the resonant frequency should not be missed. A4.1.4 The number of round trips should be more than one. A4.1.5 Vibration size: In the low frequency range, the full amplitude should be a constant. In the high frequency range, the full amplitude of acceleration should be a constant. 971
JB/T 6420—92
A4.1.6 The relationship between the full amplitude of acceleration and the full amplitude of vibration and the vibration frequency is shown in formula (A1). Where: 2α—full amplitude, mm;
2a
1 000 × 2af2~ 2a × (
4
5
2α—
--Full amplitude of acceleration expressed as a multiple of the free fall acceleration (9.80665m/s2) (g), f—Vibration frequency, Hz.
(Al)
A4.1.7 When the vibration test bench is not capable enough, a simple vibration test can be performed according to the frequency range and full amplitude specified in Table A2, and the vibration frequency is continuously increased and decreased within this frequency range. At this time, the vibration frequency change speed, the number of round trips, etc. are the same as those in A4.1.2~A4.1.4. Table A2
Vibration size
Type
1
2
Frequency range, Hz
1~30
Full amplitude
0.25
0. 5
Note: The maximum acceleration full amplitude in the table is the corresponding value of the maximum vibration frequency and full amplitude, and is for reference only. A4.2 Vibration endurance test
The vibration endurance test is divided into two types: with resonance and without resonance.
Maximum acceleration full amplitude gm/s2
0.9(8. 83)
1.8(17.7)
In principle, the vibration endurance test is carried out according to Type B in Table A3. Type A or Type C tests can also be carried out according to test time, vibration test bench capacity and other conditions.
The contents of the vibration endurance test are as follows:
A4.2.1 Non-resonance condition
The non-resonance condition is as shown in Table A3.
Table A3
Type A
Reference
Frequency
Type
1
2
Hz
10
Full amplitude
mm
2.5
5.0
Acceleration
Full
Amplitude g
m/s?
9.81)
2
(19.6)
A4.2.2
Resonance
a.
Front
Back
Test time
min
Left
Right
12
Air conditioning unit There is a resonant frequency
24
reference
full amplitude
acceleration
mm
1.75
3.5||tt ||degree full
amplitude g
m/s
0.7
[(6.86
1.4
[(13.7)|| tt||Type B
Test time
min
front
back
2
right
bottom|| tt||reference
full amplitude acceleration
mm
1.25
2.5
full amplitude
amplitude g
m /s2
0.5
(4.90)
1
(9.81)
Type C
Test time
min
Front
Back
20
Left
Right
Top
Bottom
10|| tt||At the full amplitude or resonant frequency shown in Table A1, when the full amplitude corresponding to the full amplitude of acceleration is 2αmm, the test is performed according to Table A4, but at the resonant frequency, the full amplitude corresponding to the full amplitude of acceleration shall be Obtained from equation (A1). Then continue the test according to the full amplitude shown in Table A3 and the test time shown in Table A5.
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