Method for recycling exhaust air heat of electric automobile and heat pump air-conditioning system adopting same

A heat pump air conditioner and electric vehicle technology, applied in heat recovery systems, vehicle components, air handling equipment, etc., can solve the problems of high fresh air load and large power consumption of equipment, and achieve energy saving of equipment power consumption and rapid switching of working conditions , the effect of reducing cooling energy consumption

Active Publication Date: 2015-01-21
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the fresh air load is too high during the use of the electric vehicle air c

Method used

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  • Method for recycling exhaust air heat of electric automobile and heat pump air-conditioning system adopting same
  • Method for recycling exhaust air heat of electric automobile and heat pump air-conditioning system adopting same
  • Method for recycling exhaust air heat of electric automobile and heat pump air-conditioning system adopting same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0051] like figure 1 The electric vehicle heat pump air conditioning system shown in the figure can realize the cooling and normal heating modes in the electric vehicle, and can fully recover the exhaust air heat, pre-cool / preheat the fresh air, and reduce the fresh air load, especially in winter operation , to a great extent reduce the system's demand for heat and achieve the purpose of energy saving.

[0052] The system includes an exhaust air heat recovery device 101 placed in the fresh air duct 102. The inlet on one side of the exhaust air heat recovery device 101 is the fresh air inlet 103, and the corresponding outlet is the fresh air supply port 104; the other side inlet of the exhaust air heat recovery device 101 is The exhaust air duct 108 connected to the return air duct 105, and the corresponding outlet on the other side is the exhaust air outlet 110; the exhaust air duct 108 is connected in parallel with the return air outlet 107 and connected with the return air d...

Embodiment approach 2

[0062] like figure 2 As shown, Embodiment 2 is based on Embodiment 1, and adopts a low-temperature air-source heat pump system with an intermediate supplementary air type with a heat exchanger. This embodiment can realize low-temperature Heating mode of operation. The control characteristics of the intermediate air supply system with heat exchanger are better than those of the intermediate air supply system with flash tank.

[0063] Based on the air source heat pump in Embodiment 1, the electric vehicle heat pump air-conditioning system includes an intermediate gas supply branch connected in parallel with the first valve 204 to replace the original second expansion valve 205, and the main throttling branch is used for throttling Refrigerant discharged from the indoor condenser 202 ; the intermediate air supply branch is used to process the refrigerant to the intermediate air supply pressure and return to the intermediate air supply port of the compressor 201 .

[0064] The ...

Embodiment approach 3

[0071] Embodiment 3 is on the basis of Example 1, using a low-temperature air-source heat pump system with an intermediate supplementary air type with a flash tank, such as image 3 shown. This embodiment can realize the low-temperature heating operation mode on the basis of the refrigeration mode and the conventional heating mode. Compared with Embodiment 2, the system has fewer resistance components and has a higher energy efficiency ratio.

[0072] The air conditioning system also includes: a second one-way valve 404, a flash separator 403, a second three-way valve 402, a fifth throttling device 401 and a sixth throttling device 405; the fifth throttling device 401, After the second three-way valve 402, the inlet of the flash separator 403, the outlet of the bottom end of the flash separator 403, and the sixth throttling device 405 are connected in series through pipelines, they are connected in parallel at the two ports of the first valve 204. end; the branch of the seco...

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Abstract

The invention relates to the technical field of automobile air conditioners, in particular to a method for recycling exhaust air heat of an electric automobile and a heat pump air-conditioning system adopting the method. The method for recycling the exhaust air heat of the electric automobile and the heat pump air-conditioning system adopting the method mainly solve the technical problem that in the prior art, due to the fact that a fresh air load is too high in the using process of an air conditioning system of an electric automobile, power consumption of devices is large. By the adoption of the method for recycling the exhaust air heat of the electric automobile, a great amount of heat in exhaust air is recycled, a fresh air load can be lowered to the maximum extent, and therefore compared with the prior art, the power consumption of devices is further reduced. The heat pump air-conditioning system can be switched between a refrigeration mode, a conventional heating mode and a low-temperature heating mode. The heat pump air-conditioning system has the advantages of being high in system efficiency, high in heating performance, low in thermal requirement, high in shock resistance performance, high in system safety and the like under a low-temperature environment.

Description

technical field [0001] The invention relates to the technical field of vehicle-mounted air conditioners, in particular to a method for recovering exhaust air heat of an electric vehicle and a heat pump air-conditioning system applying the method. Background technique [0002] The electric vehicle air conditioning system maintains the comfort of the vehicle through the control of the environment inside the vehicle; through the anti-fog and defrosting of the windows, it ensures driving safety, and plays an important role in maintaining the comfort, safety, and efficiency of the vehicle during operation. Has become an important part of the car. Especially for pure electric vehicles, since there is no waste heat from the engine to use, the single use of battery power for cooling and electric heating for heating reduces the mileage by about 30% to 50%, making it the auxiliary system that consumes the most energy in electric vehicles. [0003] In order to prevent the window glass...

Claims

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Application Information

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IPC IPC(8): B60H1/00B60H1/22
CPCB60H1/00007B60H1/00392B60H1/22B60H1/039Y02B30/52
Inventor 田长青秦菲邹慧明
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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