Air-conditioner heating system for extended range electric vehicle and control method of air-conditioner heating system

Abstract

The invention discloses an air-conditioner heating system for an extended range electric vehicle, which comprises a control circuit and two heating circulating water loops. The control circuit comprises a heat management integrated control unit, an air-conditioner controller, a water temperature sensor, a heating electric water pump, a PTC (positive temperature coefficient) electric heater and an engine control unit. The first heating circulating water loop starts from the heating electric water pump to sequentially pass through an engine lower three-way electric valve, the PTC electric heater, a heating ventilation air-conditioner assembly, an expansion tank and an engine upper three-way electric valve and returns to the heating electric water pump through water pipes. The second heating circulating water loop starts from an engine to sequentially pass through the engine lower three-way electric valve, the PTC electric heater, the heating ventilation air-conditioner assembly, the expansion tank and the engine upper three-way electric valve and returns to engine through water pipes. The invention further discloses a control method of the air-conditioner heating system for the extended range electric vehicle. Usable heat and power source in operation of the engine are effectively used by the air-conditioner heating system and the method, and electric quantity of batteries is saved while endurance mileage of the vehicle is increased.

Description

technical field [0001] The invention relates to an air-conditioning and heating system and a control method for an extended-range electric vehicle. technical background [0002] In order to meet the comfort of the air conditioning system, the heat source of electric vehicle heating is usually PTC electric heater. Due to the high power consumption of PTC electric heater, its continuous operation will reduce the cruising range of the vehicle by 30-40%. Although the extended-range electric vehicle has an engine, the engine does not work continuously. It only drives the generator to charge the battery when the power battery is low. That is, the engine cannot be used as a continuous heat source for the air conditioner, but it is a pity to give up the engine as a heat source. Therefore, it is really necessary to develop an air-conditioning heating system for an extended-range electric vehicle to solve the above problems. Contents of the invention [0003] The purpose of the pre...

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Problems solved by technology

[0002] In order to meet the comfort of the air conditioning system, the heat source of the electric vehicle heating is usually a PTC electric heater. Due to the high power consumption of the PTC electric heater, its continuous operation will reduce the cruising range of the vehicle by 30-40%.

Although the extended-range electric vehicle has an engine, the engine does not work continuously. It only drives the generator to charge the battery when the power battery is low. That is, the engine cannot be used as a continuous heat source for the air conditioner, but it is a pity to abandon the engine as a heat source.

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