Automobile air conditioner heat pump system and vehicle

Abstract

The invention discloses an automobile air conditioner heat pump system and a vehicle, and belongs to the technical field of automobile air conditioners, the system comprises a compressor, a water condenser, an indoor heat exchanger, a low-temperature radiator, an indoor heater, a water-water heat exchanger and the like, all the parts are connected through pipelines and controlled through a three-way valve, and stable circulation of cooling liquid and refrigerant is ensured; the system comprises a refrigerating mechanism, a first heating mechanism, a second heating mechanism and a third heating mechanism, through reasonable utilization of engine waste heat and heat recovery in refrigerant circulation, extra energy consumption is reduced, the energy utilization rate is increased, the system can adapt to different weather conditions and driving requirements, and a comfortable environment is provided for the interior of a vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile air conditioning, and more specifically, to an automobile air conditioning heat pump system and a vehicle. Background Art

[0002] In today's era of vigorous development of new energy vehicles, automotive air conditioning heat pump system has emerged as a key technology that has attracted much attention. As an efficient integrated heating and air conditioning system used in new energy vehicles, automotive air conditioning heat pump system has the excellent ability to reasonably distribute, efficiently manufacture and fully utilize heat energy.

[0003] However, at this stage, there are still many technical shortcomings in the automotive air conditioning heat pump system that need to be overcome. In terms of heat dissipation, its heat dissipation efficiency is relatively low, and it is unable to quickly dissipate the heat generated by the system operation in time, resulting in heat accumulation, which not only affects the performance stability of key components, but also easily triggers system overheating protection and interferes with normal operation; the heating capacity is also unsatisfactory. In extremely low temperature environments, it is difficult to quickly and efficiently create a warm and comfortable space in the car, and the temperature rises slowly, which cannot meet the driver and passengers' needs for rapid heating; in addition, from the perspective of the energy consumption of the entire vehicle system, the system also has the disadvantage of high energy consumption. Due to the imperfect energy recovery and supply and demand matching mechanism, it often causes unnecessary energy waste, increases the energy consumption burden of the entire vehicle, and weakens the energy-saving advantages that new energy vehicles should have. Summary of the invention

[0004] An object of the present invention is to provide an automobile air conditioning heat pump system and a vehicle to solve the problems of low heat dissipation efficiency, poor heating capacity, and high energy consumption of the aforementioned automobile air conditioning heat pump system.

[0005] According to a first aspect of the present invention, there is provided an automobile air conditioning heat pump system, comprising a compressor, a water condenser, an indoor heat exchanger, and a low-temperature radiator;

[0006] The automobile air-conditioning heat pump system includes a refrigeration mechanism. Under the refrigeration mechanism, the compressor, the water condenser, the indoor heat exchanger, and the compressor form a refrigeration cycle loop; the coolant passes through the water condenser, the indoor heat exchanger, the first three-way valve, the fourth water pump, the second three-way valve, the low-temperature radiator, and the water condenser to form a cooling cycle loop for the refrigerant.

[0007] Optionally, the automobile air conditioning heat pump system further includes a second fan;

[0008] The automobile air conditioning heat pump system also includes a first heating mechanism. Under the first heating mechanism, the refrigerant is compressed by the compressor and then enters the indoor heat exchanger for heat dissipation, and the heat is blown into the crew cabin for heating by the second fan.

[0009] Optionally, the refrigerant enters the water condenser after being cooled in the indoor heat exchanger, and absorbs heat by exchanging heat with the coolant from the low-temperature radiator, and then enters the compressor for compression and temperature increase, completing the heating cycle.

[0010] Optionally, the automobile air conditioning heat pump system further includes an indoor heater and a water-to-water heat exchanger;

[0011] The automobile air conditioning heat pump system also includes a second heating mechanism. Under the second heating mechanism, the indoor heater, the first three-way valve, the water-to-water heat exchanger, the fourth water pump, the second three-way valve, and the water condenser are connected in sequence to form a loop.

[0012] Optionally, the automobile air conditioning heat pump system further includes an engine water jacket and a supercharger;

[0013] Under the second heating mechanism, the coolant is heated in the water-to-water heat exchanger by the coolant from the engine water jacket and the supercharger, flows through the fourth water pump and the second three-way valve, and then directly flows through the water condenser, and then enters the indoor heat exchanger to release heat. The second fan blows away the heat and enters the crew cabin. The coolant that has passed through the indoor heat exchanger then enters the water-to-water heat exchanger to complete the heating cycle.

[0014] Optionally, the water-to-water heat exchanger is a three-inlet and three-outlet water-to-water heat exchanger.

[0015] Optionally, the automobile air conditioning heat pump system further includes a third heating mechanism, and the third heating mechanism is configured such that the first heating mechanism and the second heating mechanism operate simultaneously.

[0016] According to a second aspect of the present invention, a vehicle is provided, comprising the automotive air-conditioning heat pump system according to the first aspect of the present invention.

[0017] The automotive air conditioning heat pump system and vehicle disclosed in the present invention have the following technical effects:

[0018] The coolant starts from the water condenser, flows through the indoor heat exchanger, the first three-way valve, the fourth water pump, the second three-way valve, the low-temperature radiator and then returns to the water condenser, dissipating the excess heat absorbed by the coolant to the surrounding environment, preventing the coolant temperature from being too high and affecting the refrigerant cooling effect, making the refrigerant cooling cycle stable and reliable as a whole;

[0019] In the first heating mechanism, the refrigerant is compressed and heated by the compressor before entering the indoor heat exchanger, where it releases heat through heat conduction. The second fan promptly dissipates the heat into the cabin, quickly raising the cabin temperature and providing a warm environment for the passengers. Using the low-temperature coolant from the low-temperature radiator, the refrigerant absorbs the coolant heat and reheats, completing a small cycle of heat recovery and reuse, which not only reduces additional energy consumption, but also reserves energy for the next round of compression and heating, improving energy efficiency.

[0020] In the second heating mechanism, the first three-way valve is used to guide the coolant in the indoor heater to flow into the three-inlet and three-outlet water-to-water heat exchanger, where the coolant fully absorbs the heat from the engine water jacket and the supercharger coolant, improving the comprehensive energy utilization rate. Driven by the fourth water pump, the heated coolant finally enters the indoor heat exchanger to release heat. The second fan assists in evenly delivering heat to the crew cabin, and then the coolant flows back to the water-to-water heat exchanger to form a cycle. This heating method that mainly uses engine waste heat can greatly reduce additional energy consumption during vehicle operation.

[0021] The first heating mechanism and the second heating mechanism are operated simultaneously, combining the advantages of both. When encountering extremely cold weather, the first heating mechanism alone may make it difficult for the refrigerant to obtain heat from the outside due to the low ambient temperature, affecting the heating efficiency; the second heating mechanism alone will also be limited in heating when the engine is temporarily shut down or running at low load and the residual heat is insufficient. After the two are combined, on the one hand, the refrigerant's own circulation is used to obtain part of the heat from the water condenser, and on the other hand, the engine residual heat is continuously introduced. This two-pronged approach ensures that the temperature of the crew cabin rises rapidly and is maintained stably, greatly enhancing the system's ability to cope with extreme low temperatures and complex driving conditions, and ensuring comfortable heating in the car in all aspects.

[0022] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0024] Figure 1 A schematic structural diagram of an automobile air conditioning heat pump system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0026] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0027] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0028] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0029] The present invention proposes an embodiment of an automobile air conditioning heat pump system. Specifically, Figure 1 As shown, it includes compressor, water condenser, indoor heat exchanger, low temperature radiator;

[0030] The automobile air conditioning heat pump system includes a refrigeration mechanism. Under the refrigeration mechanism, the compressor, the water condenser, the indoor heat exchanger, and the compressor form a refrigeration cycle loop; the coolant passes through the water condenser, the indoor heat exchanger, the first three-way valve (such as Figure 1 The three-way valve 1), the fourth water pump (such as Figure 1 The water pump 4), the second three-way valve (such as Figure 1 The three-way valve 2), the low-temperature radiator, and the water condenser form a cooling cycle for the refrigerant. Specifically, the refrigerant enters the water condenser after being compressed by the compressor, and after being cooled by the water condenser, it enters the indoor heat exchanger for refrigeration. After refrigeration, it enters the compressor for compression to complete the refrigeration cycle. The first three-way valve and the second three-way valve play the role of accurately distributing and adjusting the flow direction of the coolant to ensure that the entire cooling cycle can be flexibly adapted according to the system operating conditions. The low-temperature radiator is responsible for dissipating the excess heat absorbed by the coolant to the surrounding environment to prevent the coolant temperature from being too high and affecting the cooling effect of the refrigerant.

[0031] In the embodiment of the present invention, the automobile air conditioning heat pump system further includes a second fan (such as Figure 1 The automobile air conditioning heat pump system also includes a first heating mechanism. Under the first heating mechanism, the refrigerant is compressed by the compressor and then enters the indoor heat exchanger for heat dissipation. The heat is blown into the crew cabin for heating by the second fan. After being cooled in the indoor heat exchanger, the refrigerant enters the water condenser and exchanges heat with the coolant from the low-temperature radiator to absorb heat. Then, it enters the compressor for compression and temperature increase to complete the heating cycle.

[0032] It should be noted that after the refrigerant temperature drops and flows into the water condenser, the relatively low-temperature coolant from the low-temperature radiator is used here. The refrigerant absorbs the heat of the coolant and heats up again, completing a small cycle of heat recovery and reuse. This not only reduces additional energy consumption, but also reserves energy for the next round of compression and heating, thereby improving energy utilization efficiency. It is especially suitable for situations where the ambient temperature is not particularly low, and can quickly respond to heating needs.

[0033] In an embodiment of the present invention, the automobile air-conditioning heat pump system also includes an indoor heater and a water-to-water heat exchanger; the automobile air-conditioning heat pump system also includes a second heating mechanism. Under the second heating mechanism, the indoor heater, the first three-way valve, the water-to-water heat exchanger, the fourth water pump, the second three-way valve, and the water condenser are connected in sequence to form a loop.

[0034] In an embodiment of the present invention, the automobile air-conditioning heat pump system also includes an engine water jacket and a supercharger; under the second heating mechanism, the coolant is heated in the water-to-water heat exchanger by the coolant from the engine water jacket and the supercharger, flows through the fourth water pump and the second three-way valve, and then directly flows through the water condenser, and then enters the indoor heat exchanger to release heat. The second fan blows away the heat into the crew cabin, and the coolant passing through the indoor heat exchanger enters the water-to-water heat exchanger to complete the heating cycle.

[0035] It should be noted that the first three-way valve is used to guide the coolant in the indoor heater to flow into the water-to-water heat exchanger, where the coolant fully absorbs the heat from the engine water jacket and the supercharger coolant. A large amount of waste heat is generated when the engine is working, and the supercharger is also accompanied by high heat during operation. In the past, most of this heat was directly dissipated, but in the system of the present invention, it is effectively recycled and utilized, greatly improving the comprehensive utilization rate of energy. Driven by the fourth water pump, the heated coolant flows through the second three-way valve and the water condenser and finally enters the indoor heat exchanger to release heat. The second fan assists in evenly delivering the heat to the crew cabin, and then the coolant flows back to the water-to-water heat exchanger to form a cycle. This heating method that mainly uses the engine waste heat can greatly reduce the additional energy consumption for heating during the operation of the vehicle. It is particularly suitable for long-term operation of the vehicle engine, reducing the vehicle's energy consumption cost and improving the heating capacity.

[0036] In an embodiment of the present invention, the water-to-water heat exchanger adopts a three-inlet and three-outlet water-to-water heat exchanger. It should be noted that the three-inlet and three-outlet water-to-water heat exchanger has three inlets and three outlets. This multi-channel structure increases the heat exchange area. In the second heating mechanism, the coolant from the indoor heater, the coolant from the engine water jacket, and the supercharger coolant can enter the three-inlet and three-outlet water-to-water heat exchanger at the same time. More contact area enables more sufficient heat exchange between liquids of different temperatures, thereby improving heating efficiency.

[0037] In an embodiment of the present invention, the automobile air conditioning heat pump system further includes a third heating mechanism, and the third heating mechanism is configured such that the first heating mechanism and the second heating mechanism operate simultaneously.

[0038] The first heating mechanism and the second heating mechanism are operated simultaneously, combining the advantages of both. When switching between different driving scenarios, the third heating mechanism can dynamically adjust the weight of the first heating mechanism and the second heating mechanism according to factors such as the temperature demand in the car and the working status of the engine, so as to achieve efficient allocation of energy between the refrigerant circulation system and the coolant waste heat recovery system, and avoid energy waste.

[0039] The present invention also provides an embodiment of a vehicle, comprising the above-mentioned automobile air conditioning heat pump system. Specifically, the above-mentioned vehicle is a hybrid electric vehicle. Through the circulation of the water condenser and the indoor heat exchanger, efficient cooling is achieved. In addition, there are multiple heating modes, so that the vehicle can better adapt to different climatic conditions, and good control of the temperature inside the vehicle directly improves the driving experience and comfort.

[0040] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings, but the above is only a preferred embodiment of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched into a variety of equivalent schemes by those skilled in the art without departing from or changing the design ideas and technical effects of the present invention; therefore, the present invention is not limited to the scope of implementation shown in the drawings, and all changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification and drawings, should be within the protection scope of the present invention.

Claims

1. An automobile air conditioning heat pump system, characterized in that: Including compressor, water condenser, indoor heat exchanger, low-temperature radiator; The automobile air-conditioning heat pump system includes a refrigeration mechanism. Under the refrigeration mechanism, the compressor, the water condenser, the indoor heat exchanger, and the compressor form a refrigeration cycle loop; the coolant passes through the water condenser, the indoor heat exchanger, the first three-way valve, the fourth water pump, the second three-way valve, the low-temperature radiator, and the water condenser to form a cooling cycle loop for the refrigerant.

2. The automobile air conditioning heat pump system according to claim 1, characterized in that: Also included is a second fan; The automobile air conditioning heat pump system also includes a first heating mechanism. Under the first heating mechanism, the refrigerant is compressed by the compressor and then enters the indoor heat exchanger for heat dissipation, and the heat is blown into the crew cabin for heating by the second fan.

3. The automobile air conditioning heat pump system according to claim 2, characterized in that: After being cooled in the indoor heat exchanger, the refrigerant enters the water condenser, exchanges heat with the coolant from the low-temperature radiator to absorb heat, and then enters the compressor for compression and temperature increase, completing the heating cycle.

4. The automobile air conditioning heat pump system according to claim 3, characterized in that: It also includes indoor heaters and water-to-water heat exchangers; The automobile air conditioning heat pump system also includes a second heating mechanism. Under the second heating mechanism, the indoor heater, the first three-way valve, the water-to-water heat exchanger, the fourth water pump, the second three-way valve, and the water condenser are connected in sequence to form a loop.

5. The automobile air conditioning heat pump system according to claim 4, characterized in that: It also includes the engine water jacket and supercharger; Under the second heating mechanism, the coolant is heated in the water-to-water heat exchanger by the coolant from the engine water jacket and the supercharger, flows through the fourth water pump and the second three-way valve, and then directly flows through the water condenser, and then enters the indoor heat exchanger to release heat. The second fan blows away the heat and enters the crew cabin. The coolant that has passed through the indoor heat exchanger then enters the water-to-water heat exchanger to complete the heating cycle.

6. The automobile air conditioning heat pump system according to claim 4, characterized in that: The water-to-water heat exchanger is a three-inlet and three-outlet water-to-water heat exchanger.

7. The automobile air conditioning heat pump system according to claim 5, characterized in that: It also includes a third heating mechanism, and the third heating mechanism is configured so that the first heating mechanism and the second heating mechanism run simultaneously.

8. A vehicle, characterized in that: It comprises the automobile air-conditioning heat pump system as described in any one of claims 1 to 7.

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