Electric automobile heat pump air conditioner defrosting control system and method
A heat pump air conditioner and electric vehicle technology, which is applied to vehicle components, air handling equipment, heating/cooling equipment, etc., can solve the problems of heating capacity attenuation, air conditioning system COP drop, etc., and achieve the effect of reducing battery energy consumption
Active Publication Date: 2021-01-05
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology
[0005]In view of this, the present invention provides a control system for controlling defrosting, which solves the problem of the decrease of the air conditioning system cop and the heating of the electric vehicle due to the frosting of the external heat exchanger. Capacity Decay
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[0031] In order to enable those skilled in the art to better understand the technical solution of the invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0032] Such as figure 1 As shown, a heat pump air conditioner defrosting control system for an electric vehicle includes a motor waste heat defrosting circuit and a reverse cycle defrosting circuit, wherein the motor waste heat defrosting circuit includes a heat pump 7, an internal heat exchanger II1 of the air conditioning box, an electronic expansion Valve Ⅰ2, external heat exchanger 3, electronic expansion valve Ⅲ4, Chiller (heat exchanger) 5 and liquid storage tank 6, the output end of heat pump 7 is connected to one end of internal heat exchanger Ⅱ1, and the other end of internal heat exchanger Ⅱ1 The first end of the external heat exchanger 3 is connected through the electronic expansion valve Ⅰ2, the second end of the external heat exchanger 3 is c...
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The invention discloses an electric automobile heat pump air conditioner defrosting control system and a method, and the method comprises the steps: firstly judging whether defrosting is needed or notin an air conditioning system state, judging the temperature of a water inlet of a motor if defrosting is needed, and carrying out the defrosting through waste heat recovery if the temperature of thewater inlet of the motor is greater than T2 DEG C; and if the temperature of the water inlet of the motor is lower than T2 DEG C, switching to a reverse circulation defrosting stage, and entering a heating mode until the defrosting stage is finished. According to the invention, the problems that the COP of the air conditioning system is reduced and the heating capacity is attenuated due to frosting of the external heat exchanger of the electric automobile are solved, and the energy consumption of the battery is reduced by defrosting by utilizing motor waste heat.
Description
technical field [0001] The invention relates to the technology in the field of defrosting of new energy vehicles, in particular to a defrosting control system and a defrosting control method. Background technique [0002] The energy source of new energy vehicles is the battery. When the temperature drops in winter, the passenger compartment is heated by air conditioning. Different from traditional cars, traditional fuel vehicles can heat up by absorbing the waste heat of cooling water due to the running of the engine, while new energy vehicles can only be heated by air conditioning, so the impact on battery life is very obvious. [0003] However, when heating in a low-temperature environment, the external heat exchanger is prone to condense thick frost during heating, which makes the heat exchange efficiency of the external heat exchanger drop sharply and increases the energy consumption of the compressor. The heating efficiency is greatly reduced, which wastes battery ener...
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IPC IPC(8): B60H1/00B60H1/04
CPCB60H1/00878B60H1/00392B60H1/00485B60H1/04B60H2001/00961
Inventor 朴昌浩王维维王小波袁荣棣刘子杨桑梓航周安建郑登宇
Owner CHONGQING UNIV OF POSTS & TELECOMM