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Electric vehicle air conditioning system with independent cooling and heating cycles

A refrigeration system and heating system technology, applied in vehicle parts, transportation and packaging, air handling equipment, etc., can solve the problem of large heating power consumption, achieve the effect of improving heating efficiency and reducing system energy consumption

Active Publication Date: 2018-06-12
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It cannot solve the problem of large heating power consumption in the air conditioning system of electric vehicles under low temperature conditions

Method used

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  • Electric vehicle air conditioning system with independent cooling and heating cycles
  • Electric vehicle air conditioning system with independent cooling and heating cycles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown, this embodiment includes: a refrigeration system and a heating system. The heating system and the refrigeration system are independent of each other, and the air is heated and cooled in turn. The refrigeration system uses R134a as the refrigerant, and the heating system uses carbon dioxide as the refrigerant.

[0024] The refrigeration system uses R134a refrigerant, and the heating system uses carbon dioxide as the refrigerant.

[0025] The refrigeration system includes: an in-vehicle evaporator 2, an outside heat exchanger 4, a first axial fan 5, a first expansion valve 6 and an automobile air-conditioning compressor 7. The input end of the air conditioner compressor 7 is connected, the input end of the in-vehicle evaporator 2 is connected to the outside heat exchanger 4 through the first expansion valve 6, and the input end of the outside heat exchanger 4 is connected to the output end of the automobile air conditioner compressor 7.

[0026] The he...

Embodiment 2

[0032] Such as figure 2 As shown, this embodiment includes: a refrigeration system and a heating system. The heating system and the refrigeration system are independent of each other, and the air is heated and cooled in turn. The refrigeration system uses R134a as the refrigerant, and the heating system uses carbon dioxide as the refrigerant.

[0033] The cycle pressure of carbon dioxide refrigerant is relatively high, and the pressure resistance requirements of the system heat exchanger are very high, so the air is heated through the intermediate medium to reduce the requirements for the heat exchanger. The intermediate medium can be a mixture of water, water and ethylene glycol or other inert liquids.

[0034] The difference between this embodiment and Embodiment 1 is:

[0035] The heating system includes: a heater core 3, a carbon dioxide compressor 8, a second expansion valve 9, a second axial flow fan 10, an outside evaporator 11, a plate heat exchanger 12, a circulating water...

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PUM

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Abstract

The invention discloses an electric automotive air conditioning system with mutually independent refrigerating cycle and heating cycle. The electric automotive air conditioning system comprises a refrigerating system and a heating system, wherein the refrigerating system and the heating system are mutually independent, and sequentially realize air heating and air refrigeration; the refrigerating system adopts a refrigerating agent R134a; the heating system adopts carbon dioxide as a refrigerating agent. The refrigerating system comprises an automotive internal evaporator, an automotive external heat exchanger, a first axial flow fan, a first expansion valve and an automotive air conditioning compressor. The heating system comprises a warm-wind core body, a carbon dioxide compressor, a second expansion valve, a second axial flow fan and an automotive external evaporator. During refrigeration, the refrigerating system independently performs refrigeration; during heating, the heating system independently performs heating; during demisting, the refrigerating system and the heating system operate at the same time. According to the electric automotive air conditioning system disclosed by the invention, the refrigerating efficiency and the heating efficiency of the electric automotive air conditioning system are improved, and the energy consumption is reduced, so that one-time charging mileage of an electric automobile is increased.

Description

Technical field [0001] The invention relates to a technology in the field of electric vehicles, in particular to an electric vehicle air-conditioning system with independent refrigeration and heating cycles. Background technique [0002] At present, electric vehicles usually use heat pump air conditioners to realize the operations of cooling, heating, dehumidification and defogging in the vehicle. [0003] Electric vehicles use batteries as driving power, and there is no engine waste heat used for heating. The heat source that cannot provide the vehicle for winter heating must have its own heating function, that is, a heat pump air conditioning system must be used. The existing electric vehicle air-conditioning system usually uses R134a refrigerant. When the ambient temperature is too low, the air-conditioning efficiency is reduced and the heating capacity is reduced. Therefore, heating under low temperature conditions will consume more electricity and reduce the stroke of each el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60H1/00
CPCB60H1/00028B60H1/00392
Inventor 李万勇施骏业高天元张子琦陈江平
Owner SHANGHAI JIAOTONG UNIV