Heating device of electric automobile

Abstract

The invention discloses a heating device of an electric automobile, which comprises an expansion tank, wherein an outlet pipe of the expansion tank is connected with an electric heater by utilizing a water pump; an inlet pipe of the expansion tank is connected with the electric heater by utilizing a water pump; the water pumps are electronic water pumps; the electric heater comprises a heating core body; at least one heating rod is arranged in the heating core body; the heating rod is connected with a power supply of the entire automobile; an aluminum pipe is arranged on the external end of a wire of the heating rod; the aluminum pipe is utilized to fix the heating core body; injection molding waste is arranged between the aluminum pipe and the wire; the aluminum pipe is welded in the heating core body; and a temperature sensor is arranged in the heating core body. The heating device of an electric automobile has the advantages of reasonable design, low cost and energy consumption reduction.

Description

technical field [0001] The invention relates to an automobile air-conditioning and heating system, in particular to an electric automobile heating device. Background technique [0002] The traditional internal combustion engine uses the cooling water of the engine to provide heat source for air conditioning and heating. With the development of new energy, electric vehicles will become the mainstream. There is no internal combustion engine in electric vehicles, and there is no cooling water as a heat source. Therefore, cooling water cannot be used for heating in winter. The heating of electric vehicles has become an obstacle to improving comfort. [0003] Traditional electric vehicle heating uses the method of heating air, which is to use electric energy to heat a resistor, and the heat on the surface of the resistor is taken away by wind flow. There are several disadvantages in doing so: [0004] 1. The heat transfer efficiency is not high, Q=cmΔt, the specific heat of air ...

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Problems solved by technology

[0004] 1. The heat transfer efficiency is not high, Q=cmΔt, the specific heat of air is 1.06x10 3 , the specific heat of water is 4.2x10 3 , under the same m and Δt, water can release much more heat than air

[0005] 2. The heating power of traditional electric vehicles is not high. Electric vehicles are powered by electricity, and the voltage of their electrical equipment is 12V. With a 2000W electric heater, its current will reach 167A. In order to ensure such a large current, it is necessary to select enough Thick wires, so the electric heating of the entire electric vehicle will not be too large

[0006] 3. When the electric vehicle is heating, the air collected from the outside cannot form a loop, and the adjustment of its temperature cannot be realized

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