CN-122008811-A - Refrigerating system and testing method for off-road vehicle

CN122008811ACN 122008811 ACN122008811 ACN 122008811ACN-122008811-A

Abstract

The invention relates to the technical field of off-road vehicle air conditioning systems, and particularly discloses an off-road vehicle refrigerating system and a testing method. The first refrigerating loop is formed by compressing a refrigerant through an electric compressor, condensing the refrigerant through a condenser assembly, evaporating the refrigerant in a cab rear refrigerating assembly completely, and returning the refrigerant to the electric compressor through a pipeline, the second refrigerating loop is formed by condensing the refrigerant through the condenser assembly, evaporating the refrigerant in a cab front refrigerating assembly completely, and returning the refrigerant to the electric compressor through the pipeline, the third refrigerating loop is formed by condensing the refrigerant through the electric compressor, absorbing heat in a heat exchanger and evaporating the refrigerant, and returning the refrigerant to the electric compressor through the pipeline.

Inventors

WEN YU
Dong Daimeng
LIU ZHENGQUAN
SUN WANLAI
LU CHAO
DING HAO
ZHANG HENG
YAN KUO
Cai Bosong
GUO JIAN

Assignees

一汽解放汽车有限公司

Dates

Publication Date: 20260512
Application Date: 20260323

Claims (11)

1. The utility model provides an off-road vehicle refrigerating system, its characterized in that includes electric compressor (1), condenser assembly (2), heat exchanger (3), refrigerating assembly before the driver's cabin (4), refrigerating assembly after the driver's cabin (5), battery refrigerating assembly (6) and controller (7), electric compressor (1) are located off-road vehicle refrigerating system's lowest department, electric compressor (1) export with condenser assembly (2) import intercommunication, condenser assembly (2) export respectively with before the driver's cabin import of refrigerating assembly (4) behind the driver's cabin import of refrigerating assembly (5) heat exchanger (3) one import of heat exchanger (3) can be in on-off intercommunication, before the driver's cabin export of refrigerating assembly (4) behind the driver's cabin export all with electric compressor (1) import can be in communication, one export of heat exchanger (3) with before the driver's cabin export of refrigerating assembly (4), battery refrigerating assembly (6) with the import of another refrigerating assembly (3), heat exchanger (3) import before the driver's cabin refrigerating assembly (3), the heat exchanger (3) import of heat exchanger (3) can be in communication, the heat exchanger (3) before the driver's cabin refrigerating assembly (5) can be in on-off communication with one another refrigerating assembly (4) The device comprises a cab rear refrigeration assembly (5) and a battery refrigeration assembly (6), wherein the cab rear refrigeration assembly (5) and the battery refrigeration assembly (6) are all in communication connection with a controller (7), and the controller (7) is used for controlling the electric compressor (1), the condenser assembly (2), the heat exchanger (3), the cab front refrigeration assembly (4), the cab rear refrigeration assembly (5) and the battery refrigeration assembly (6) to work.
2. The off-road vehicle refrigeration system of claim 1, wherein the post-cab refrigeration assembly (5) comprises a post-cab evaporator (51), a first three-way valve (52) and a second three-way valve (53), the post-cab evaporator (51) being disposed in an inner rear periphery of the off-road vehicle cab, the outlet of the condenser assembly (2) being in communication with an inlet of the first three-way valve (52), an outlet of the first three-way valve (52) being in on-off communication with an inlet of the post-cab evaporator (51), an outlet of the post-cab evaporator (51) being in communication with an inlet of the second three-way valve (53), an outlet of the second three-way valve (53) being in communication with the electric compressor (1).
3. The off-road vehicle refrigeration system of claim 2, wherein the cab-after-refrigeration assembly further includes a first control valve (54), the first control valve (54) being disposed on a line communicating an outlet of the first three-way valve (52) with an inlet of the cab-after-evaporator (51).
4. The off-road vehicle refrigeration system according to claim 2, wherein the cab front refrigeration assembly (4) includes a cab front evaporator (41), a third three-way valve (42), and a fourth three-way valve (43), the cab front evaporator (41) being provided at a front periphery of a cab of the off-road vehicle, the other outlet of the first three-way valve (52) being in communication with an inlet of the third three-way valve (42), the one outlet of the third three-way valve (42) being in on-off communication with an inlet of the cab front evaporator (41), the other outlet of the third three-way valve (42) being in on-off communication with an inlet of the heat exchanger (3), the outlet of the cab front evaporator (41) being in communication with one inlet of the fourth three-way valve (43), the outlet of the fourth three-way valve (43) being in communication with the other inlet of the second three-way valve (53).
5. The off-road vehicle refrigeration system of claim 4, wherein the pre-cabin refrigeration assembly further comprises a second control valve (44), the second control valve (44) being disposed on a line communicating an outlet of the third three-way valve (42) with an inlet of the pre-cabin evaporator (41).
6. The off-road vehicle refrigeration system of claim 4, wherein the pre-room refrigeration assembly further comprises a third control valve (45), the third control valve (45) being disposed on a line communicating the other outlet of the third three-way valve (42) with one inlet of the heat exchanger (3).
7. The off-road vehicle refrigeration system according to claim 4, wherein the battery refrigeration assembly (6) includes a cooling water path (61), a PTC water heater (62), a driving water pump (63) and an expansion water tank (64), an inlet of the cooling water path (61) is communicated with another outlet of the heat exchanger (3), an outlet of the cooling water path (61) is communicated with another inlet of the heat exchanger (3), the driving water pump (63) is disposed at a lowest position of the cooling water path (61), the PTC water heater (62) is disposed between the cooling water path (61) and the another inlet of the heat exchanger (3), and the expansion water tank (64) is disposed at a highest position of the cooling water path (61) and between the driving water pump (63) and the another outlet of the heat exchanger (3).
8. The off-road vehicle refrigeration system as defined in claim 7, wherein the battery refrigeration assembly (6) further comprises a first temperature sensor (65) and a second temperature sensor (66) each communicatively connected to the controller (7), the first temperature sensor (65) being disposed between the PTC water heater (62) and the other inlet of the heat exchanger (3) and being configured to monitor the temperature of the cooling water after being heated by the PTC water heater (62), and the second temperature sensor (66) being disposed between the expansion tank (64) and the other outlet of the heat exchanger (3) and being configured to monitor the temperature of the cooling water after being cooled by the heat exchanger (3).
9. The off-road vehicle refrigeration system of claim 1, further comprising a first pressure sensor (81) and a second pressure sensor (82) each communicatively connected to the controller (7), the first pressure sensor (81) being disposed at an outlet of the electric compressor (1) and being configured to monitor a high pressure of the off-road vehicle refrigeration system, and the second pressure sensor (82) being disposed at an outlet of the condenser assembly (2) and being configured to monitor a pressure of refrigerant at the outlet of the condenser assembly (2).
10. The off-road vehicle refrigeration system of claim 1, further comprising a first warm-pressure sensor (83), a second warm-pressure sensor (84) and a third warm-pressure sensor (85), each communicatively connected to the controller (7), the first warm-pressure sensor (83) being disposed at one outlet of the heat exchanger (3) and being used for monitoring the pressure and temperature of the refrigerant at the outlet of the heat exchanger (3), the second warm-pressure sensor (84) being disposed at the outlet of the pre-cab refrigeration assembly (4) and being used for monitoring the pressure and temperature of the refrigerant at the outlet of the pre-cab refrigeration assembly (4), the third warm-pressure sensor (85) being disposed at the outlet of the post-cab refrigeration assembly (5) and being used for monitoring the pressure and temperature of the refrigerant at the outlet of the post-cab refrigeration assembly (5).
11. A method of testing an off-road vehicle refrigeration system, adapted for use in accordance with any one of claims 1-10, the method comprising: s1, placing the off-road vehicle refrigerating system in an environmental cabin with the environmental temperature of 35 ℃ and the relative humidity of 50%; s2, setting filling quantity test conditions; S3, filling 750g of refrigerant into the off-road vehicle refrigerating system, recording the superheat degree at the outlet of the condenser assembly (2) once every 15 minutes, and continuously filling 50g of refrigerant; s4, repeating the step S3, and recording a section of the supercooling degree of the condenser assembly (2) with a straight section so as to calculate the refrigerant filling quantity of the off-road vehicle refrigerating system; S5, testing the off-road vehicle refrigerating system under different working conditions to verify whether the performance of the off-road vehicle refrigerating system meets the preset requirement and whether the rotating speed of the electric compressor (1) meets the calibration requirement.

Description

Refrigerating system and testing method for off-road vehicle Technical Field The invention relates to the technical field of off-road vehicle air conditioning systems, in particular to a refrigerating system of an off-road vehicle and a testing method. Background At present, in order to meet the requirement that the off-road vehicle can realize silent running under special combat conditions, a hybrid power architecture is adopted, the power source of the architecture is a fuel engine and a power battery, and the effective cooling of the power battery is the key content of the current hybrid vehicle research in order to avoid the risk of thermal runaway in the working process due to the special characteristics of the power battery. Meanwhile, the cooling requirement of the passenger cabin in high-temperature weather is considered, and the power battery and the refrigerating system of the passenger cabin are required to be coupled. The integration of battery and passenger cabin cooling is realized by the thermal management system of most hybrid motor vehicles, but basically, single evaporator arrangement is adopted in the cockpit, and the passenger cabin cooling requirement of a larger space of a military off-road vehicle cannot be met. According to the heat load calculation result of the cab, the front-rear double-evaporator air conditioner design scheme is adopted in the cab of the off-road vehicle in the related art, the front air conditioner evaporator and the power battery form a set of refrigerating system, the rear evaporator is another set of refrigerating system, and the two sets of refrigerating systems are independent of each other, but the two sets of compressors and condensers are preferably required in the design scheme, so that more arrangement space is occupied, and the vehicle cost is increased. Disclosure of Invention The invention aims to provide a refrigerating system and a testing method for an off-road vehicle, which are used for solving the problems of larger occupied space and higher vehicle cost of the refrigerating system of the off-road vehicle in the prior art. In one aspect, the invention provides an off-road vehicle refrigeration system, which comprises an electric compressor, a condenser assembly, a heat exchanger, a cab front refrigeration assembly, a cab rear refrigeration assembly, a battery refrigeration assembly and a controller, wherein the electric compressor is positioned at the lowest part of the off-road vehicle refrigeration system, the outlet of the electric compressor is communicated with the inlet of the condenser assembly, the outlet of the condenser assembly is respectively communicated with the inlet of the cab front refrigeration assembly, the inlet of the cab rear refrigeration assembly and one inlet of the heat exchanger in an on-off manner, the outlet of the cab front refrigeration assembly and the outlet of the cab rear refrigeration assembly are respectively communicated with the inlet of the electric compressor, one outlet of the heat exchanger is communicated with the outlet of the cab front refrigeration assembly, the inlet of the battery refrigeration assembly is communicated with the other outlet of the heat exchanger, and the outlet of the battery refrigeration assembly is communicated with the other inlet of the heat exchanger. As an alternative technical scheme of the off-road vehicle refrigerating system, the cab rear refrigerating assembly comprises a cab rear evaporator, a first three-way valve and a second three-way valve, the cab rear evaporator is arranged on the inner rear periphery of the off-road vehicle cab, the outlet of the condenser assembly is communicated with one inlet of the first three-way valve, one outlet of the first three-way valve is communicated with the inlet of the cab rear evaporator in an on-off manner, the outlet of the cab rear evaporator is communicated with one inlet of the second three-way valve, and the outlet of the second three-way valve is communicated with the electric compressor. As an alternative solution of the refrigeration system of the off-road vehicle, the post-cab refrigeration assembly further comprises a first control valve, and the first control valve is arranged on a pipeline which is used for communicating one outlet of the first three-way valve with the inlet of the post-cab evaporator. As an alternative technical scheme of the off-road vehicle refrigeration system, the cab front refrigeration assembly comprises a cab front evaporator, a third three-way valve and a fourth three-way valve, the cab front evaporator is arranged on the front periphery of the off-road vehicle cab, the other outlet of the first three-way valve is communicated with the inlet of the third three-way valve, one outlet of the third three-way valve is communicated with the inlet of the cab front evaporator in an on-off manner, the other outlet of the third three-way valve is communicated with one inlet of the heat exchanger i