A heat pump heating system for electric passenger car with enhanced heating effect

Abstract

The invention relates to an electric passenger car heat pump warm air system capable of reinforcing the heating effect. The electric passenger car heat pump warm air system comprises a warm air heating module and a warm air heat pump system. The warm air heating module comprises a plurality of air heaters symmetrically arranged on the two sides of the bottom of the interior of a car. The warm air heat pump system absorbs heat generated by an electric car driving motor and converts the heat into a heat medium to be output to the air heaters. When the system is started, a car-interior top-arranged air conditioner evaporating fan is started simultaneously, the air heaters supply air into the car from the two sides to enable hot air circulative convection to be formed in the car so as to improve the car-interior heating effect, wherein according to the hot air circulative convection, hot air rises to the top space in the car and is sent back to the bottom space in the car through the top-arranged air conditioner evaporating fan. According to the electric passenger car heat pump warm air system capable of reinforcing the heating effect, the heat of the driving motor and a driving motor controller is recycled, and through the air heaters arranged on the two sides of the bottom in the car, effective heating is supplied to the interior of the car, so that the heating effect is greatly improved while electric power consumption is not increased.

Description

technical field [0001] The invention relates to an electric vehicle, in particular to a heat pump warm air system for enhancing the heating effect of an electric passenger car. Background technique [0002] For pure electric passenger cars, the power source is the on-board power battery, which needs to provide electric energy for the inverter air-conditioning system that provides passenger comfort and heating for the passengers in the vehicle. [0003] In summer, passengers need to provide a comfortable and cool riding environment, so they need to use air conditioners to provide cooled air. Generally, the layout structure of the roof-mounted air-conditioning unit outside the car is adopted. The conventional air outlets are arranged on both sides of the roof inside the car. After returning the air, it is placed in the middle of the roof of the car. The air is evenly sent to the top of the passengers, and evenly sinks to the surroundings of the passengers, and then returns to...

AI Technical Summary

Problems solved by technology

[0005] Due to the restriction on the structural layout of the roof-mounted (inverter) cooling and heating air-conditioning unit system, the convection circulation air outlet and return air outlet of the air-conditioning system are above the roof, so there is no problem in the cooling mode, but when the passengers need to be heated in winter, in the above three types of systems In the thermal heating mode, since the convection circulation outlet and the return air outlet are above the roof, according to the principle of thermal aerodynamics, the warm air for heating passengers can only circulate and convect near the head space in the car, and the warm air cannot reach the passengers surrounding location

[0006] In addition, when the ambient temperature is lower than 2 degrees, when the heating system of the general overhead (inverter) cooling and heating air conditioner works as a heat pump heating system, the overhead (inverter) air conditioner works in the heat pump heating mode. The ambient temperature is low, and the heat extracted from the environment is very little, so that the surface temperature of the external heat exchanger of the overhead (inverter) air conditioner is lower than the freezing temperature of the condensed water, and a thick layer of frost is often deposited on the surface of the external heat exchanger. Seriously affect the heat exchange performance and efficiency of the external heat exchanger, and even the external heat exchanger fails to work, so that the heating efficiency of the overhead (inverter) air conditioner is low, and the air conditioner must frequently defrost the external heat exchanger, so when the environment When the temperature is lower than 2 degrees, the overhead air conditioner heat pump heating mode cannot normally and continuously provide the required heat in the car, and cannot normally meet the basic heating needs of passengers

In order to provide heating for the passengers in the pure electric passenger car, it is necessary to turn on the PTC auxiliary heating system. Since the heating power of the PTC auxiliary heating system is very large, and the capacity of the on-board power supply is limited by the unit volume of the pure electric passenger car, it is not necessary to The power capacity required by the PTC auxiliary heating system that may match the corresponding mileage will seriously affect the mileage of the pure electric bus with the use of the PTC auxiliary heating system

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