CN1709734A - Electric Vehicle Heat Pump Air Conditioning System - Google Patents

Abstract

An air conditioning system of the dynamoelectric automotive heat pump belongs to the field of the heat pump system structure. The invention contains the compressor, the four-through valve, the first unilateralism valve, the inner condensator, the F type heating power inflatable valve, the second unilateralism valve, the outer condensator, the first ending valve, the second ending valve, the H type heat power inflatable valve, the inner evaporator and the gas and liquid segregator. The exit of the compressor connects with the intake of the four-through valve. Two exits of the four-through valve separately connect with the intake of the first unilateralism valve and the inner condensator. The exit of the first unilateralism valve connects with the intake of the outer condensator. The exit of the inner condensator connects with the intake of the F type heating power inflatable valve. The exit of the F type heating power inflatable valve connects with the intake of the second unilateralism valve. The exit of the second unilateralism valve connects with the intake of the outer condensator. The exits of the outer condensator connect separately with the intakes of the first ending valve and the second ending valve. The exit of the first ending valve connects with the intake of the gas and liquid segregator. The structure of the invention is easy.

Description

Electric Vehicle Heat Pump Air Conditioning System

technical field

The invention relates to an air conditioner in the technical field of power machinery, in particular to an electric vehicle heat pump air conditioner system.

Background technique

At present, the air-conditioning system widely used in automobile air-conditioning can only meet the cooling requirements in summer working conditions, and the heating in winter working conditions mainly meets the comfort requirements of the car interior by using the engine cooling water with a higher temperature to heat the air. Traditional internal combustion engine vehicles heat the cabin air by using the waste heat from the engine, and cool it by directly using the engine to drive the compressor. Electric vehicles do not have a heat source like an engine, so they can only use a heat pump air-conditioning system with an electric compressor. However, the batteries used to power the heat pump system are mainly used to drive the car, and the energy consumption of the air conditioning system has a large impact on the distance traveled by the car per charge. Therefore, the electric vehicle air conditioning system needs to provide a comfortable environment for the vehicle cabin with the minimum consumption.

After searching the existing technical documents, it is found that the Chinese patent application number is: 03140422.7, and the patent name is: motor-driven automobile air conditioner. The automobile engine, cooling water tank, engine pulley, transmission belt and generator connected by the belt, battery pack, motor, air conditioner compressor are characterized in that: said automobile air conditioner compressor is not driven by the automobile engine, but by The special electric motor connected on the accumulator pack directly drives the operation of the air conditioner compressor. The present invention effectively overcomes the deficiencies caused by the cooling of the existing automobile air conditioner driven by the operation of the engine. By reforming the refrigeration mode of the existing automobile air conditioner, it not only improves the The cooling efficiency of automotive air conditioners, while achieving the purpose of environmental protection and energy saving. It can be installed and used on various types of vehicles.” Although this technology can be used on various types of conventional vehicles, the system used in this technology cannot provide a comfortable environment for electric vehicles , In the absence of engine waste heat, it is impossible to provide heat for the car interior in winter.

Contents of the invention

The object of the present invention is to overcome the disadvantages of the prior art, and provide a heat pump air-conditioning system for electric vehicles, which has a simple structure and is easy to implement, and can provide a comfortable thermal environment for electric vehicles.

The present invention is achieved through the following technical solutions, the present invention includes: a compressor, a four-way valve, a first one-way valve, an internal evaporator, an F-type thermal expansion valve, a second one-way valve, an external condenser, a first Stop valve, second stop valve, H-type thermal expansion valve, internal condenser, gas-liquid separator, the outlet of the compressor is connected to the inlet of the four-way valve, and the two outlets of the four-way valve are respectively connected to the inlet of the first stop valve and the second stop valve The valve inlet is connected, the outlet of the first one-way valve is connected with the inlet of the external condenser, the outlet of the internal condenser is connected with the inlet of the F-type thermal expansion valve, the outlet of the F-type thermal expansion valve is connected with the inlet of the second one-way valve, and the second one-way valve The outlet of the directional valve is connected to the inlet of the external condenser, the outlet of the external condenser is connected to the inlet of the first stop valve and the second stop valve respectively, the outlet of the first stop valve and the outlet of the internal evaporator are connected to the inlet of the gas-liquid separator, and the second stop valve The outlet is connected to the inlet of the H-type thermal expansion valve, the outlet of the H-type expansion valve is connected to the inlet of the internal evaporator, and the outlet of the gas-liquid separator is connected to the inlet of the compressor.

The compressor is an electric compressor.

The driving power of the four-way valve is DC 12V.

The external condenser is a compact parallel flow heat exchanger.

The first cut-off valve is a solenoid valve driven by DC 12V.

The second cut-off valve is a solenoid valve driven by DC 12V.

The position of the internal condenser is set in the evaporation box assembly.

The working process of the present invention is as follows: when working in summer, the second one-way valve and the first shut-off valve are closed. The working process of the refrigeration cycle is: the compressor consumes a certain amount of electric energy to compress the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, which releases heat when it flows through the external condenser, and the heat released by the refrigerant is absorbed by the ambient air. A phase change occurs and condenses into a liquid state. When the liquid refrigerant flows through the H-type thermal expansion valve, the refrigerant depressurizes and cools down. When flowing through the internal evaporator, it absorbs the heat in the indoor air and undergoes a phase change to evaporate into a gaseous state. The low-temperature and low-pressure gaseous refrigerant is compressed by the compressor into high-temperature and high-pressure gaseous refrigerant, and the cycle works like this. Indoor air passing through the internal evaporator is sent into the cabin, reducing the temperature in the cabin and providing a comfortable riding environment. The gas-liquid separator is an auxiliary protection component to prevent the compressor from being struck by liquid.

In winter conditions, the first one-way valve and the second stop valve are closed. The working process of the heating cycle is: the compressor consumes a certain amount of electric energy to compress the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, which releases heat when it flows through the internal condenser, and the heat released by the refrigerant is absorbed by the air in the car. It itself undergoes a phase change and condenses into a liquid state. When the liquid refrigerant flows through the F-type thermal expansion valve, the refrigerant drops in pressure and temperature. When it flows through the external condenser, it absorbs the heat in the ambient air and undergoes a phase change and evaporates into a gaseous state. , the low-temperature and low-pressure gaseous refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant by the compressor, and the cycle works like this. Indoor air passing through the internal condenser is sent into the cabin, reducing the temperature in the cabin and providing a comfortable riding environment. The gas-liquid separator is an auxiliary protection component to prevent the compressor from being struck by liquid.

The present invention adopts the above-mentioned cycle process, which makes the system simple in structure and compact in components, without adding more components. The invention is reasonable in structure, novel in conception, easy to implement, capable of providing a comfortable environment in any weather conditions for the vehicle compartment, and can truly realize heat pump air conditioning for electric vehicles.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Detailed ways

As shown in Figure 1, the present invention includes: a compressor 1, a four-way valve 2, a first one-way valve 3, an internal condenser 4, an F-type thermal expansion valve 5, a second one-way valve 6, an external condenser 7, The first cut-off valve 8, the second cut-off valve 9, the H-type thermal expansion valve 10, the internal evaporator 11, the gas-liquid separator 12, the outlet 1 of the compressor is connected to the inlet of the four-way valve 2, and the two outlets of the four-way valve 2 They are respectively connected to the inlet of the first one-way valve 3 and the inlet of the internal condenser 4, the outlet of the first one-way valve 3 is connected to the inlet of the external condenser 7, the outlet of the internal condenser 4 is connected to the inlet of the F-type thermal expansion valve 5, and the F The outlet of type thermal expansion valve 5 is connected with the inlet of the second one-way valve 6, the outlet of the second one-way valve 6 is connected with the inlet of the external condenser 7, and the outlet of the external condenser 7 is respectively connected with the inlets of the first stop valve 8 and the second stop valve 9 The outlet of the first stop valve 8 and the outlet of the internal evaporator 11 are connected to the inlet of the gas-liquid separator 12, the outlet of the second stop valve 9 is connected to the inlet of the H-type thermal expansion valve 10, and the outlet of the H-type expansion valve 10 is connected to the inlet of the internal evaporator 11 The inlet is connected, and the outlet of the gas-liquid separator 12 is connected with the inlet of the compressor 1 .

The compressor 1 is an electric compressor.

The driving power of the four-way valve 2 is DC 12V.

The position of the internal condenser 4 is set in the evaporation box assembly.

The external condenser 7 is a compact parallel flow heat exchanger.

The first cut-off valve 8 is a solenoid valve driven by DC 12V.

The second cut-off valve 9 is a solenoid valve driven by DC 12V.

Claims (7)

1. A heat pump air-conditioning system for electric vehicles, comprising: compressor (1), external condenser (7), H-type thermal expansion valve (10), internal evaporator (11), gas-liquid separator (12), its It is characterized in that it also includes: four-way valve (2), first one-way valve (3), internal condenser (4), F-type thermal expansion valve (5), second one-way valve (6), first cut-off valve valve (8), the second cut-off valve (9), the compressor outlet (1) is connected to the inlet of the four-way valve (2), and the two outlets of the four-way valve (2) are respectively connected to the inlet of the first one-way valve (3) and The inlet of the internal condenser (4) is connected, the outlet of the first one-way valve (3) is connected with the inlet of the external condenser (7), the outlet of the internal condenser (4) is connected with the inlet of the F-type thermal expansion valve (5), and the F The outlet of the type thermal expansion valve (5) is connected with the inlet of the second one-way valve (6), the outlet of the second one-way valve (6) is connected with the inlet of the external condenser (7), and the outlet of the external condenser (7) is respectively connected with the first The shut-off valve (8) is connected to the inlet of the second shut-off valve (9), the outlet of the first shut-off valve (8) and the outlet of the internal evaporator (11) are connected to the inlet of the gas-liquid separator (12), and the second shut-off valve (9) The outlet is connected to the inlet of the H-type thermal expansion valve (10), the outlet of the H-type thermal expansion valve (10) is connected to the inlet of the internal evaporator (11), and the outlet of the gas-liquid separator (12) is connected to the inlet of the compressor (1). 2. The electric vehicle heat pump air-conditioning system according to claim 1, characterized in that, the compressor (1) is an electric compressor. 3. The electric vehicle heat pump air-conditioning system according to claim 1, characterized in that, the driving power of the four-way valve (2) is DC 12V. 4. The electric vehicle heat pump air-conditioning system according to claim 1, characterized in that, the position of the internal condenser (4) is set in the evaporation box assembly. 5. The electric vehicle heat pump air-conditioning system according to claim 1, characterized in that, the external condenser (7) is a compact parallel flow heat exchanger. 6. The electric vehicle heat pump air-conditioning system according to claim 1, characterized in that, the first cut-off valve (8) is a solenoid valve driven by DC 12V. 7. The electric vehicle heat pump air-conditioning system according to claim 1, characterized in that, the second shut-off valve (9) is a solenoid valve driven by DC 12V.