阅读说明：本技术 一种集成储液及气液分离的汽车空调系统 (Integrated stock solution and gas-liquid separation's vehicle air conditioning system ) 是由 周通 邓湘 于 2021-09-27 设计创作，主要内容包括：本发明涉及一种集成储液及气液分离的汽车空调系统,包括制冷剂回路,其包括压缩机、冷凝器、换热器和蒸发器,压缩机的制冷剂进口连接有制冷剂回流管道；和气液分离装置,其包括储液罐、同轴管和第一阀门；储液罐具有进料端、出气端和出液端；同轴管包括同轴设置的外流体管道和内流体管道,出气端和出液端安装于同轴管的同一端,出气端与内流体管道连接,出液端与外流体管道连接,同轴管的另一端与蒸发器连接,内流体管道还与制冷剂回流管道连接,第一阀门安装于出气端,制冷剂回流管道与内流体管道连通的部位位于第一阀门和压缩机之间；其可以消除噪音,提高制冷效果；保证了压缩机没有液击的风险。(The invention relates to an integrated liquid storage and gas-liquid separation automobile air conditioning system, which comprises a refrigerant loop, a refrigerant loop and a refrigerant loop, wherein the refrigerant loop comprises a compressor, a condenser, a heat exchanger and an evaporator; a gas-liquid separation device comprising a liquid storage tank, a coaxial pipe and a first valve; the liquid storage tank is provided with a feeding end, a gas outlet end and a liquid outlet end; the coaxial pipe comprises an outer fluid pipeline and an inner fluid pipeline which are coaxially arranged, the air outlet end and the liquid outlet end are arranged at the same end of the coaxial pipe, the air outlet end is connected with the inner fluid pipeline, the liquid outlet end is connected with the outer fluid pipeline, the other end of the coaxial pipe is connected with the evaporator, the inner fluid pipeline is also connected with a refrigerant backflow pipeline, a first valve is arranged at the air outlet end, and the part of the refrigerant backflow pipeline communicated with the inner fluid pipeline is positioned between the first valve and the compressor; it can eliminate noise and improve refrigeration effect; the compressor is guaranteed to have no risk of liquid impact.)

1. An automobile air conditioning system integrating liquid storage and gas-liquid separation is characterized by comprising

The refrigerant loop comprises a compressor, a condenser, a heat exchanger and an evaporator, wherein the compressor, the condenser and the heat exchanger are sequentially connected through refrigerant pipelines, and a refrigerant inlet of the compressor is connected with a refrigerant return pipeline;

a gas-liquid separation device comprising a liquid storage tank, a coaxial pipe and a first valve; the liquid storage tank is provided with a feeding end for the refrigerant to enter, an air outlet end for the gaseous refrigerant to be discharged and a liquid outlet end for the liquid refrigerant to be discharged; the coaxial pipe comprises an outer fluid pipeline and an inner fluid pipeline which are coaxially arranged, the air outlet end and the liquid outlet end are arranged at the same end of the coaxial pipe, the air outlet end is connected with the inner fluid pipeline, the liquid outlet end is connected with the outer fluid pipeline, the other end of the coaxial pipe is connected with the evaporator, the inner fluid pipeline is also connected with the refrigerant backflow pipeline, the first valve is arranged at the air outlet end, and the part of the refrigerant backflow pipeline, which is communicated with the inner fluid pipeline, is positioned between the first valve and the compressor;

wherein the first valve is configured to be closed when the air conditioner is in a cooling mode and to be opened when the air conditioner is in a heating mode.

2. The integrated liquid storage and gas-liquid separation automobile air conditioning system according to claim 1, wherein the liquid storage tank comprises a tank body, a feed pipe, an air outlet pipe and a liquid outlet pipe, the feed pipe is installed at the feed end, the lower part of the tank body is used for storing liquid refrigerant, one end of the air outlet pipe is positioned above the liquid level of the liquid refrigerant, and the other end of the air outlet pipe extends to the outside of the tank body to form an air outlet end; one end of the liquid outlet pipe extends into the position below the liquid level of the liquid refrigerant, and the other end of the liquid outlet pipe extends to the outside of the tank body to form a liquid outlet end.

3. The integrated liquid storage and gas-liquid separation automobile air conditioning system according to claim 2, wherein the air outlet pipe comprises an air inlet section, an oil return section and an air outlet section which are sequentially connected, the air inlet section, the oil return section and the air outlet section are combined to form a U-shaped structure, the end of the air inlet section is located above the liquid level of the liquid refrigerant, the end of the air outlet section extends to the outside of the tank body to form the air outlet end, and the oil return section is immersed in the liquid refrigerant.

4. The integrated liquid storage and gas-liquid separation automobile air conditioning system according to claim 1, wherein the gas-liquid separation device further comprises a second valve mounted on the coaxial pipe to open or close the internal fluid pipeline; the second valve is configured to be open when the air conditioner is in the cooling mode and closed when the air conditioner is in the heating mode.

5. The integrated liquid storage and gas-liquid separation automotive air conditioning system according to claim 4, characterized in that the first valve and the second valve are expansion valves.

6. The integrated liquid storage and gas-liquid separation automobile air conditioning system according to claim 1, wherein the condenser is a water-cooled condenser.

Technical Field

The invention relates to the technical field of heat pump type automobile air conditioning systems, in particular to an automobile air conditioning system integrating liquid storage and gas-liquid separation.

Background

In an air conditioning system for an EV (Electric Vehicle), an HEV (Hybrid Electric Vehicle), a PHEV (Plug-in Hybrid Vehicle), or the like, a heating operation cannot be performed by using combustion exhaust heat of engine cooling water or the like. Therefore, a heat pump type air conditioning system using an electric compressor has been considered, but when a reversing heat pump is used, it is necessary to share piping constituting a refrigerant circuit, a heat exchanger such as an evaporator and a condenser, and the like under different pressure conditions of a cooling operation and a heating operation, and therefore, it is necessary to improve a vehicle air conditioning system applied to a current engine-driven vehicle in a comprehensive manner.

The existing automobile heat pump air conditioning system is generally only provided with a single gas-liquid separation device, as shown in fig. 1, the existing automobile heat pump air conditioning system comprises a compressor 1, a condenser 2, a heat exchanger, a gas-liquid separation device 4 and an evaporator 5 which are sequentially connected in a circulating manner, and the air conditioning system is not provided with a liquid storage device in a refrigeration mode, so that the possibility that a refrigerant flowing into the evaporator 5 has no supercooling degree or even has a gaseous state exists, the refrigeration efficiency is low, the refrigerant flows abnormally, and the user experience is influenced.

Disclosure of Invention

Based on the above description, the invention provides an automobile air conditioning system integrating liquid storage and gas-liquid separation, so as to solve the technical problems that the refrigeration efficiency is low and abnormal noise is generated due to flowing of a refrigerant because no liquid storage device is arranged during refrigeration in the prior art.

The technical scheme for solving the technical problems is as follows:

an integrated liquid storage and gas-liquid separation automobile air conditioning system comprises

The refrigerant loop comprises a compressor, a condenser, a heat exchanger and an evaporator, wherein the compressor, the condenser and the heat exchanger are sequentially connected through refrigerant pipelines, and a refrigerant inlet of the compressor is connected with a refrigerant return pipeline;

a gas-liquid separation device comprising a liquid storage tank, a coaxial pipe and a first valve; the liquid storage tank is provided with a feeding end for the refrigerant to enter, an air outlet end for the gaseous refrigerant to be discharged and a liquid outlet end for the liquid refrigerant to be discharged; the coaxial pipe comprises an outer fluid pipeline and an inner fluid pipeline which are coaxially arranged, the air outlet end and the liquid outlet end are arranged at the same end of the coaxial pipe, the air outlet end is connected with the inner fluid pipeline, the liquid outlet end is connected with the outer fluid pipeline, the other end of the coaxial pipe is connected with the evaporator, the inner fluid pipeline is also connected with the refrigerant backflow pipeline, the first valve is arranged at the air outlet end, and the part of the refrigerant backflow pipeline, which is communicated with the inner fluid pipeline, is positioned between the first valve and the compressor;

wherein the first valve is configured to be closed when the air conditioner is in a cooling mode and to be opened when the air conditioner is in a heating mode.

Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:

according to the automobile air conditioning system integrating liquid storage and gas-liquid separation, during operation, a refrigerant is input into a condenser from a compressor, passes through a heat exchanger and then enters a liquid storage tank through a feeding end, under a cooling mode, as a first valve is closed, the liquid storage tank bears a liquid storage function, no gaseous refrigerant enters an evaporator at an air outlet end, the liquid refrigerant enters the evaporator from a liquid outlet end through an outer fluid pipeline, the refrigerant entering the evaporator is guaranteed to be pure liquid, noise generated when the gaseous refrigerant flows through the evaporator is eliminated, and the gaseous refrigerant evaporated by the evaporator flows into a refrigerant backflow pipeline from an inner fluid pipeline and enters the compressor to realize circulation; when the refrigerant passes through the coaxial pipe, heat exchange is carried out, a certain supercooling degree is achieved, and the refrigeration effect of the air conditioner is improved; in the heating mode, as the first valve is opened, the gaseous refrigerant enters the compressor from the air outlet end through the refrigerant backflow pipeline to realize circulation, and the refrigerant entering the compressor is gaseous, the compressor is ensured to have no risk of liquid impact.

On the basis of the technical scheme, the invention can be further improved as follows.

Furthermore, the liquid storage tank comprises a tank body, a feeding pipe, an air outlet pipe and a liquid outlet pipe, wherein the feeding pipe is arranged at the feeding end, the lower part of the tank body is used for storing liquid refrigerant, one end of the air outlet pipe is positioned above the liquid level of the liquid refrigerant, and the other end of the air outlet pipe extends to the outside of the tank body to form an air outlet end; one end of the liquid outlet pipe extends into the position below the liquid level of the liquid refrigerant, and the other end of the liquid outlet pipe extends to the outside of the tank body to form a liquid outlet end.

Further, the outlet duct is including the section of admitting air, the oil return section that connect gradually and the section of giving vent to anger, the section of admitting air, the oil return section and the section combination of giving vent to anger form the U-shaped structure, the tip of the section of admitting air is located the liquid level top of liquid refrigerant, the tip of the section of giving vent to anger extends to the external formation of jar the end of giving vent to anger, the oil return section immerses in the liquid refrigerant.

Further, the gas-liquid separation device further comprises a second valve, and the second valve is mounted on the coaxial pipe to open or close the internal fluid pipeline; the second valve is configured to be open when the air conditioner is in the cooling mode and closed when the air conditioner is in the heating mode.

Further, the first valve and the second valve are expansion valves.

Further, the condenser is a water-cooled condenser.

Drawings

FIG. 1 is a schematic diagram of a prior art automotive heat pump air conditioning system;

fig. 2 is a schematic state diagram of an integrated liquid storage and gas-liquid separation automobile air conditioning system in a refrigeration mode according to an embodiment of the present disclosure;

fig. 3 is a schematic view illustrating a state in which fig. 2 is in a heating mode.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that spatial relationship terms, such as "under", "below", "beneath", "below", "over", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. The "connection" in the following embodiments is understood as "electrical connection", "communication connection", or the like if the connected circuits, modules, units, or the like have electrical signals or data transmission therebetween.

As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

As shown in fig. 2 and 3; the embodiment provides an integrated liquid storage and gas-liquid separation automobile air conditioning system, which comprises a refrigerant loop and a gas-liquid separation device.

The refrigerant loop comprises a compressor 10, a condenser 20, a heat exchanger 30 and an evaporator 40, wherein the compressor 10, the condenser 20 and the heat exchanger 30 are sequentially connected through refrigerant pipelines, and a refrigerant inlet of the compressor 10 is connected with a refrigerant return pipeline 11.

The gas-liquid separation device comprises a liquid storage tank 60, a coaxial pipe 70 and a first valve 80; the receiver tank has a feed end 601 for refrigerant inlet, a gas outlet end 602 for gaseous refrigerant outlet, and a liquid outlet end 603 for liquid refrigerant outlet.

The coaxial pipe 70 includes an outer fluid pipeline and an inner fluid pipeline which are coaxially disposed, the gas outlet end 601 and the liquid outlet end 603 are mounted at the same end (left end in the figure) of the coaxial pipe 70, the gas outlet end 601 is connected with the inner fluid pipeline, the liquid outlet end 603 is connected with the outer fluid pipeline, the other end (right end in the figure) of the coaxial pipe 70 is connected with the evaporator 40, the inner fluid pipeline is further connected with the refrigerant backflow pipeline 11, the first valve 80 is mounted at the gas outlet end 602, and the refrigerant backflow pipeline 11 is communicated with the inner fluid pipeline at a position between the first valve 80 and the compressor 10.

Wherein the first valve 80 is configured such that the first valve 80 is closed when the air conditioner is in a cooling mode, and the first valve 80 is opened when the air conditioner is in a heating mode.

In this embodiment, the liquid storage tank 60 comprises a tank body 61, a feeding pipe 62, an air outlet pipe 63 and a liquid outlet pipe 64.

The feeding pipe 62 is installed at the feeding end 601, the lower portion of the tank 61 is used for storing liquid refrigerant, one end of the gas outlet pipe 63 is located above the liquid level of the liquid refrigerant, and the other end extends to the outside of the tank 61 to form a gas outlet end 602.

One end of the liquid outlet pipe 64 extends below the liquid level of the liquid refrigerant, and the other end extends to the outside of the tank 61 to form a liquid outlet end 603.

The air outlet pipe 63 comprises an air inlet section 631, an oil return section 632 and an air outlet section 633 which are sequentially connected, the air inlet section 632, the oil return section 632 and the air outlet section 633 are combined to form a U-shaped structure, the end of the air inlet section 631 is located above the liquid level of the liquid refrigerant, the end of the air outlet section 633 extends to the outside of the tank body 61 to form the air outlet end 602, and the oil return section 632 is immersed in the liquid refrigerant.

In order to prevent the refrigerant in the gas state from entering the evaporator 40 in the heating mode, the gas-liquid separating device further includes a second valve 90, the second valve 90 being installed on the coaxial pipe 70 to open or close the internal fluid pipe; the second valve 90 is configured such that the second valve 90 is opened when the air conditioner is in the cooling mode, and the second valve 90 is closed when the air conditioner is in the heating mode.

Preferably, the first valve 80 and the second valve are expansion valves; the condenser 20 is a water-cooled condenser.

When the air conditioning system works, a refrigerant is input into a condenser from a compressor, passes through a heat exchanger and then enters a liquid storage tank through a feed end, under a cooling mode, because a first valve 80 is closed and a second valve 90 is opened, no gaseous refrigerant enters an evaporator 40 from an air outlet end 602, the liquid refrigerant enters the evaporator 40 from a liquid outlet pipe 62 and through an external fluid pipeline, the refrigerant entering the evaporator 40 is ensured to be in a pure liquid state, noise generated when the gaseous refrigerant passes through the evaporator 40 is eliminated, and the gaseous refrigerant evaporated by the evaporator 40 flows into a refrigerant return pipeline 11 from the internal fluid pipeline and enters the compressor 10 to realize circulation; when the refrigerant passes through the coaxial pipe 70, heat exchange is carried out, a certain supercooling degree is achieved, and the refrigeration effect of the air conditioner is improved.

In the heating mode, as the first valve 80 is opened and the second valve 90 is closed, the gaseous refrigerant enters the compressor 10 from the gas outlet 601 through the refrigerant return pipeline 11 to realize circulation, and the refrigerant entering the compressor 10 is gaseous, so that the compressor 10 is ensured not to have the risk of liquid impact.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.