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Two-heat-exchanger heat pump air conditioning system for small electric vehicle

A technology for electric vehicles and heat pump air conditioners, applied in vehicle components, air handling equipment, heating/cooling equipment, etc., can solve problems such as deficiencies, and achieve the effects of low cost, good flow regulation, and simple structure

Pending Publication Date: 2021-05-07
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a two-heat exchanger heat pump air-conditioning system for a small electric vehicle, which solves the shortage of refrigerant flow direction and the number of heat exchangers in the two-heat exchanger heat pump air-conditioning system problems, improve the utilization efficiency of indoor and outdoor heat exchangers, simple structure, high efficiency and energy saving, and good stability

Method used

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  • Two-heat-exchanger heat pump air conditioning system for small electric vehicle
  • Two-heat-exchanger heat pump air conditioning system for small electric vehicle
  • Two-heat-exchanger heat pump air conditioning system for small electric vehicle

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Embodiment 1

[0027] refer to figure 2, is the cooling condition of the two-heat exchanger heat pump air conditioning system for small electric vehicles. Under the cooling condition, the four solenoid valves are not powered, the outdoor heat exchanger fan is turned on, and the compressor 1 outlet discharges high-temperature and high-pressure gaseous refrigeration refrigerant, the refrigerant enters the outdoor heat exchanger 7 after passing through the first solenoid valve 21 . At this time, the outdoor heat exchanger 7 is used as a condenser under refrigeration conditions, and transfers the heat of the refrigerant to the surrounding environment through heat exchange to obtain liquid low-temperature and high-pressure refrigerant. Subsequently, the refrigerant flows through the one-way valve 5 from the branch path and then flows into the thermal expansion valve 3, and expands into a low-temperature and low-pressure gaseous refrigerant after being throttled by it. The gaseous refrigerant di...

Embodiment 2

[0029] refer to image 3 , by energizing the four solenoid valves the system can be switched from figure 2 The cooling condition shown transforms into image 3 In the heating condition shown, under the heating condition, the four solenoid valves are energized, the outdoor heat exchanger fan is turned on, and the high-temperature and high-pressure gaseous refrigerant is discharged from the outlet of compressor 1, and the refrigerant passes through the second solenoid valve. After 22, enter the indoor heat exchanger 4. At this time, the indoor heat exchanger 4 is used as a condenser under the heating condition, and transfers the heat of the refrigerant to the surrounding environment through heat exchange, thereby heating the air in the air-conditioning box and increasing its temperature. Subsequently, the refrigerant flows into the electronic expansion valve 6 from the branch circuit, and expands into a low-temperature and low-pressure gaseous refrigerant after being throttle...

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Abstract

The invention discloses a two-heat-exchanger heat pump air conditioning system for a small electric vehicle. The system comprises an indoor heat exchanger, a thermostatic expansion valve connected with the inlet and outlet end of the indoor heat exchanger, a one-way valve connected with the thermostatic expansion valve in series, an electronic expansion valve connected with the one-way valve in parallel, and an outdoor heat exchanger connected with one parallel end of the electronic expansion valve and the one-way valve in series. One end of the outdoor heat exchanger is connected in series with an electromagnetic valve group, one end of the electromagnetic valve group is connected in parallel with a compressor and a gas-liquid separator connected in series with the compressor, and the other end of the electromagnetic valve group is connected in series with a thermostatic expansion valve; according to the air conditioning system, the air conditioning mode or the heat pump mode is switched by cutting off the electromagnetic valve set, the thermostatic expansion valve, the electronic expansion valve and the one-way valve. According to the invention, the problems of insufficient refrigerant flow direction and insufficient number of heat exchangers in a heat pump air-conditioning system with two heat exchangers are solved, the utilization efficiency of indoor and outdoor heat exchangers is improved, the structure is simple, the efficiency is high, the energy is saved, and the stability is good.

Description

technical field [0001] The invention relates to the technical field of automobile air-conditioning, in particular to a heat pump air-conditioning system with two heat exchangers for a small electric automobile. Background technique [0002] In recent years, the number of electric vehicles in the world has gradually increased, and vehicle electrification is considered to be an effective way to promote energy diversity and alleviate global warming and pollution. With the changes in people's lifestyles, new energy vehicles are also constantly innovating. With its affordable price, mini body and efficient performance, small electric vehicles have attracted more and more attention, especially for most urbanites, they are indeed economical and convenient. Therefore, a simple, efficient, and low-cost two-heat exchanger heat pump air-conditioning system for small electric vehicles was proposed for application. Contents of the invention [0003] Aiming at the deficiencies in the ...

Claims

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Application Information

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IPC IPC(8): B60H1/00
CPCB60H1/00392B60H1/00328B60H1/00485Y02T10/88
Inventor 穆文杰杨忠诚刘旭阳苏林李康方奕栋盛雷
Owner UNIV OF SHANGHAI FOR SCI & TECH
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