A thermal management system and control method for a transcritical carbon dioxide electric vehicle
A thermal management system, carbon dioxide technology, applied in the direction of vehicle parts, component optimization, air treatment equipment, etc., can solve the problems that hinder the popularization and application of transcritical CO2, drag down the progress of green refrigerants, and fail to meet the requirements of human comfort. Achieve the effect of outstanding heating performance, improved cooling performance and low price
Active Publication Date: 2021-07-13
XI AN JIAOTONG UNIV
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Problems solved by technology
[0003] However, according to the existing research on transcritical CO 2 Cycle studies found that transcritical CO 2 When the cycle is used as an air conditioner, the cooling performance at high ambient temperature (above 35°C) is not ideal. Meet the comfort requirements of the human body
This shortcoming seriously hinders the transcritical CO 2 The comprehensive promotion and application of green refrigerants has hindered the progress of the development of green refrigerants
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[0044] The present invention will be further described in detail below with reference to the accompanying drawings.
[0045] See figure 1 As shown, the present invention provides a cross-critical carbon dioxide electric vehicle thermal management system, including: compressor 1, gas cooler 2, first electron expansion valve 3, reservoir 4, second electronic expansion valve 5, and evaporator 6 .
[0046] The outlet of the compressor 1 is connected to the gas cooler 2 and the first electronic expansion valve 3; the gas outlet of the reservoir 4 is connected to the B suction port of the compressor 1; the liquid outlet of the reservoir 4 passes the second The electronic expansion valve 5 and the evaporator 6 connect the A suction port of the compressor 1.
[0047] The refrigerant is compressed to the supercritical state 2 of the high temperature and high pressure in the compressor, and the medium pressure plasma in the gas cooler is introduced into a state point 4, and there is a two-p...
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The invention discloses a thermal management system and a control method for a transcritical carbon dioxide electric vehicle, comprising: a compressor, a gas cooler, a first electronic expansion valve, a liquid storage device, a second electronic expansion valve and an evaporator; the compressor It adopts 3+1 cylinder supplementary air piston compressor. The a suction port of the compressor is connected to 3 main cylinders for main cycle compression, and the b suction port of the compressor is connected to an auxiliary cylinder for supplementary air compression. Compression is completed The latter two refrigerants are mixed, and the compression frequency of the two is the same; the outlet of the compressor is connected to the liquid receiver through the gas cooler and the first electronic expansion valve; the gas outlet of the liquid receiver is connected to the b suction port of the compressor; the liquid storage The liquid outlet of the evaporator is connected to the a suction port of the compressor through the second electronic expansion valve and the evaporator. The invention solves the problem of insufficient refrigeration performance of transcritical carbon dioxide, and promotes the development of green refrigerant CO 2 Stepping into the process of practical application, it has made great contributions to environmental protection and energy saving.
Description
Technical field [0001] The present invention belongs to the technical field of interpersonal carbon dioxide systems, and in particular, the present invention relates to a transcendal carbon dioxide electric vehicle thermal management system and its control methods. Background technique [0002] Traditional refrigerants have gradually faced trends due to poor environmental performance. Co 2 As a natural refrigerant, the advantage is obvious. First, CO 2 Non-toxic and unbustible, with very little quality as a heat pump system or air conditioning system, even after leakage, the concentration is also very low, will not cause fatal damage to the human body. Second, CO 2 It is a pure natural gas, which will not cause damage to the environment, green and environmental protection, and meet the requirements of sustainable development, not only that, CO 2 In the natural environment, it is rich in content, low prices, good economy. Finally, CO 2 The cross-critical circulation has a unique a...
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IPC IPC(8): B60H1/00B60H1/32
CPCB60H1/00392B60H1/3205B60H1/3211B60H2001/327B60H2001/328Y02T10/88
Inventor 曹锋王静方建珉殷翔
Owner XI AN JIAOTONG UNIV