External air conditioning system of electric vehicle, control method and electric vehicle

Abstract

The invention relates to the field of electric vehicles, and provides an external air conditioning system of an electric vehicle, a control method and the electric vehicle. The external air conditioning system comprises a middle net and a fan, and further comprises a heat exchanger, a battery radiator, a temperature sensor and a controller, wherein the heat exchanger and the battery radiator are located between the middle net and the fan. The temperature sensor is connected with the heat exchanger and is connected with the battery radiator. The controller is used for detecting the temperatureof the heat exchanger and the temperature of the battery radiator when the heat exchanger needs to absorb heat. When the temperature of the battery radiator is higher than that of the heat exchanger,the fan is controlled to rotate, the temperature of the battery radiator is sent to the heat exchanger through wind so as to heat the heat exchanger, the heating performance of an air conditioner canbe improved, and meanwhile frosting is prevented.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an external air-conditioning system for an electric vehicle, a control method and the electric vehicle. Background technique [0002] Since pure electric vehicles do not have an engine at present, they cannot use engine hot water preheating for heating. At present, heat pump technology is often used to solve the problem of the air conditioning system, that is, the heat exchanger is converted between the evaporator and the condenser. However, due to the relatively cold weather in winter, the outdoor heat exchanger cannot absorb a large amount of heat, resulting in poor heating of the cab, and it is also difficult to defrost after frost. At present, technologies such as PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor), dual heat pumps or energy storage tanks are often used to assist defrosting, but each has the problems of large power co...

AI Technical Summary

Problems solved by technology

However, due to the relatively cold weather in winter, the outdoor heat exchanger cannot absorb a large amount of heat, resulting in poor heating of the cab, and it is also difficult to defrost after frost

At present, technologies such as PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor), dual heat pumps or energy storage tanks are often used to assist defrosting, but they have the problems of large power consumption, high cost and poor defrosting effect.

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