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A vehicle heat pump air conditioning system and its control method

A heat pump air conditioner and vehicle technology, which is applied to vehicle components, refrigerators, refrigeration components, etc., can solve problems such as shortening the compressor life, exceeding the safe operation range of the compressor, shortening the cruising range, etc., so as to improve human comfort and avoid The problem of stopping heating inside the car and the effect of shortening the defrosting time

Active Publication Date: 2021-01-15
GREE ELECTRIC APPLIANCES INC
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AI Technical Summary

Problems solved by technology

[0002] New energy electric vehicles solve the environmental protection problems of fuel vehicles and the dependence on fossil fuels. However, since electric vehicles have no engine waste heat to use in winter, the air-conditioning system assisted by electric heating will consume a lot of electric energy for heating, shortening the cruising range. In order to improve the heating efficiency of new energy electric vehicles in winter, a heat pump air-conditioning system is adopted. However, when the heat pump system is running in a low-temperature and high-humidity outdoor environment in winter, the external heat exchanger is prone to frosting, and the frost layer continues. Thickening makes the heating capacity of the on-board air-conditioning system continue to decline. When the existing on-board heat pump system is defrosting, it will switch the heating mode to the cooling mode, and the indoor heating will stop, which greatly affects the comfort of the occupants.
[0003] In addition, conventional electric vehicle air conditioning systems can only operate at relatively high outdoor ambient temperatures, and the ambient temperature for normal operation is as low as -10°C. The safe operating range of the machine, the life of the compressor is seriously shortened

Method used

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  • A vehicle heat pump air conditioning system and its control method

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Embodiment Construction

[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus their repeated descriptions will be omitted.

[0036] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or mo...

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Abstract

The invention provides a vehicle heat pump air-conditioning system and a control method thereof. The present invention divides the refrigerant into two paths through the first (plate type) heat exchanger and supplementing air to the compressor (gas supplementation enthalpy increasing compressor). Run hot. And the refrigerant in the main flow is cooled by the refrigerant in the air supply circuit, the gas delivery capacity is increased, and the exhaust temperature of the compressor is reduced. The heat pump air-conditioning system of the present invention also enables the air-conditioning system of the present invention to switch between reverse cycle defrosting control and bypass defrosting control by constructing a bypass branch, and can adopt different defrosting methods according to the amount of frosting. frost control, thereby improving defrosting efficiency.

Description

technical field [0001] The invention relates to a vehicle heat pump air conditioning system and a control method thereof, in particular to an electric vehicle heat pump air conditioning system and a control method thereof. Background technique [0002] New energy electric vehicles solve the environmental protection problems of fuel vehicles and the dependence on fossil fuels. However, since electric vehicles have no engine waste heat to use in winter, the air-conditioning system assisted by electric heating will consume a lot of electric energy for heating, shortening the cruising range. In order to improve the heating efficiency of new energy electric vehicles in winter, a heat pump air-conditioning system is adopted. However, when the heat pump system is running in a low-temperature and high-humidity outdoor environment in winter, the external heat exchanger is prone to frosting, and the frost layer continues. Thickening makes the heating capacity of the on-board air-condi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B13/00F25B41/00F25B49/02F25B47/02B60H1/00F25B41/20F25B41/30F25B41/40
CPCF25B13/00F25B41/00F25B49/02F25B47/022F25B47/025B60H1/00392
Inventor 李珂谭锋陈付齐
Owner GREE ELECTRIC APPLIANCES INC
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