Electric compressor integrated with gas-liquid separator

Abstract

The invention relates to an electric compressor, in particular to an electric compressor integrated with a gas-liquid separator. A controller; the gas-liquid separator comprises a separation cavity, a separation air inlet pipe, a refrigerant air inlet pipe and an oil return pipe, the input end of the separation air inlet pipe is used for injecting a refrigerant, the output end of the separation air inlet pipe is arranged in the separation cavity in a penetrating mode, the input end of the refrigerant air inlet pipe is used for leading out the separated refrigerant, and the output end of the refrigerant air inlet pipe is arranged in the separation cavity in a penetrating mode; the oil return pipe is communicated between the separation cavity and the oil pool; the output end of the separation air inlet pipe is arranged in a manner of avoiding the input end of the refrigerant air inlet pipe, so that oil in a refrigerant can be sprayed to the inner wall of the separation cavity and flows out along the oil return pipe; and the gas-liquid separator is mounted on one side of the compressor body. According to the compressor, the gas-liquid separator is arranged on one side of the compressor body, the function of separating oil in a refrigerant is provided, the integration degree is high, materials are saved, and leakage is avoided.

Description

Technical Field

[0001] The present invention relates to an electric compressor, and more particularly to an electric compressor integrated with a gas-liquid separator. Background Art

[0002] The description in this part only provides background information related to the disclosure of the present invention and does not constitute prior art.

[0003] Currently, under the strong national policies, the popularization of electric vehicles is an irresistible trend. However, during the current process of developing electric vehicles, more and more problems are emerging. For example, the conventional gas-liquid separator and the compressor body are of a split structure. During use, the gas-liquid separator needs to be fixed to the frame, and then the gas-liquid separator and the intake cavity of the compressor body are connected through pipes, which occupies a large area and is difficult to install on site. Therefore, it is necessary to adjust the structure of the gas-liquid separator to reduce its space occupation and improve the stability of its installation structure.

[0004] It should be noted that the above introduction of the technical background is only for the convenience of clearly and completely explaining the technical solution of the present invention and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of the present invention. Summary of the Invention

[0005] The purpose of the present invention is to provide an electric compressor integrated with a gas-liquid separator, which can provide the function of separating oil in the refrigerant by arranging the gas-liquid separator on one side of the compressor body, with high integration, material saving and leakage prevention.

[0006] To achieve the above purpose, the present invention discloses an electric compressor integrated with a gas-liquid separator, which includes:

[0007] A compressor body, which is provided with an oil sump;

[0008] A controller, which is installed on one side of the compressor body;

[0009] A gas-liquid separator, which includes a separation chamber, a separation inlet pipe, a refrigerant inlet pipe, and an oil return pipe. The input end of the separation inlet pipe is used for injecting refrigerant, the output end of the separation inlet pipe penetrates into the separation chamber, the input end of the refrigerant inlet pipe is used for leading out the separated refrigerant, the output end of the refrigerant inlet pipe penetrates into the separation chamber, and the oil return pipe is connected between the separation chamber and the oil sump; wherein, the output end of the separation inlet pipe is arranged to avoid the input end of the refrigerant inlet pipe, so that the oil in the refrigerant can be sprayed onto the inner wall of the separation chamber and flow out along the oil return pipe.

[0010] Among them, the gas-liquid separator is installed on one side of the compressor body.

[0011] As a further description of the above technical solution, there is an angle other than 0 degrees or 180 degrees between the output end of the separation inlet pipe and the input end of the refrigerant inlet pipe.

[0012] As a further description of the above technical solution, the output end of the separation inlet pipe is provided with a plurality of branch outlets, and the orientations of the branch outlets of each separation inlet pipe are different.

[0013] As a further description of the above technical solution, the branch outlets of the separation inlet pipe are provided in two, the angle between the two branch outlets of the separation inlet pipe is 180 degrees, and the two branch outlets of the separation inlet pipe extend perpendicular to the extension direction of the input end of the refrigerant inlet pipe.

[0014] As a further description of the above technical solution, the input end of the refrigerant inlet pipe is provided with a plurality of branch inlets, and the orientations of the branch inlets of each refrigerant inlet pipe are different.

[0015] As a further description of the above technical solution, the branch inlets of the refrigerant inlet pipe are provided in two, the angle between the two branch inlets of the refrigerant inlet pipe is 180 degrees, and the two branch inlets of the refrigerant inlet pipe extend perpendicular to the extension direction of the output end of the separation inlet pipe.

[0016] As a further description of the above technical solution, the gas-liquid separator further includes a separation net, the separation net is arranged in the separation cavity, and the output end of the separation inlet pipe passes through the separation net, and the separation net is used to isolate the separation cavity into two sub-spaces, and the oil return pipe is arranged on the side of the separation net away from the refrigerant inlet pipe.

[0017] As a further description of the above technical solution, the gas-liquid separator is installed on the outer wall surface of the compressor body.

[0018] As a further description of the above technical solution, the gas-liquid separator is installed on the inner wall surface of the compressor body, and among them, the separation cavity is integrally formed with the compressor body.

[0019] As a further description of the above technical solution, the gas-liquid separator is installed at the position between the compressor body and the controller, and among them, the separation cavity is integrally formed with the compressor body.

[0020] By means of the above technical solutions, the beneficial effects of the present invention are as follows:

[0021] 1. The electric compressor with an integrated gas-liquid separator of the present invention can provide the function of separating oil in the refrigerant by arranging the gas-liquid separator on one side of the compressor body. Specifically, since the structure of the gas-liquid separator is closely arranged adjacent to the compressor body, the path for the refrigerant inlet pipe of the gas-liquid separator to communicate with the intake cavity is shortened. In some embodiments, the connecting pipe that is necessary after the separation cavity in the split setting can be saved, reducing the material input, and at the same time reducing the number of leakage points, thereby reducing the leakage probability during the refrigerant transportation process.

[0022] 2. The gas-liquid separator is directly connected to the compressor body or integrally formed. On the one hand, it can ensure the stability of the connection without the need to additionally set up reinforcement components. On the other hand, it saves the space occupied by separate layout, is suitable for small-space scenarios. In addition, the compressor body can directly position the gas-liquid separator, reducing the complexity of the gas-liquid separator installation and improving the installation efficiency.

[0023] 3. The port pipeline for separating the refrigerant can be set at the output end of the separation inlet pipe or the input end of the refrigerant inlet pipe, and the number of pipelines can also be set according to needs, with a more flexible layout, which can further reduce the space occupation.

[0024] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the provided drawings are only for reference and illustration, and are not used to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in this specification. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of an external gas-liquid separator of an electric compressor with an integrated gas-liquid separator provided by an embodiment of this specification;

[0027] Figure 2 It is a schematic diagram of an integrated gas-liquid separator of an electric compressor provided by an embodiment of this specification;

[0028] Figure 3 It is a schematic diagram of an internal gas-liquid separator of an electric compressor with an integrated gas-liquid separator provided by an embodiment of this specification;

[0029] Figure 4Schematic diagram of the gas-liquid separator of an electric compressor with an integrated gas-liquid separator provided in an embodiment of this specification, where the gas-liquid separator is disposed between the controller and the compressor body;

[0030] In the figure:

[0031] 1. Compressor body; 11. Oil sump;

[0032] 2. Controller;

[0033] 3. Gas-liquid separator; 31. Separation chamber; 32. Separation inlet pipe; 33. Refrigerant inlet pipe; 34. Return oil pipe; 35. Isolation net. Specific embodiments

[0034] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this specification.

[0035] The following are specific embodiments to illustrate the embodiments of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only for simple schematic illustration and are not drawn according to actual dimensions, with prior notice. The following embodiments will further detail the related technical content of the present invention, but the disclosed content is not intended to limit the protection scope of the present invention.

[0036] It should be understood that although terms such as "first", "second", and "third" may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another or one signal from another. In addition, the term "or" used herein may include any one or a combination of more of the associated listed items depending on the actual situation.

[0037] Please refer to Figures 1-4 , an electric compressor with an integrated gas-liquid separator for this embodiment, where the electric compressor with an integrated gas-liquid separator includes:

[0038] Compressor body 1, and the compressor body 1 is provided with an oil sump 11;

[0039] The controller 2 is installed on one side of the compressor body 1;

[0040] The gas-liquid separator 3 includes a separation chamber 31, a separation inlet pipe 32, a refrigerant inlet pipe 33, and an oil return pipe 34. The input end of the separation inlet pipe 32 is used to introduce refrigerant, and the output end of the separation inlet pipe 32 penetrates into the separation chamber 31. The input end of the refrigerant inlet pipe 33 is used to lead out the separated refrigerant, and the output end of the refrigerant inlet pipe 33 penetrates into the separation chamber 31. The oil return pipe 34 is connected between the separation chamber 31 and the oil sump 11; wherein, the output end of the separation inlet pipe 32 is arranged to avoid the input end of the refrigerant inlet pipe 33, so that the oil in the refrigerant can be sprayed onto the inner wall of the separation chamber 11 and flow out along the oil return pipe 34;

[0041] Among them, the gas-liquid separator 3 is installed on one side of the compressor body 1.

[0042] Specifically, in the above structure, an oil sump 11 and an intake chamber are provided on one side of the compressor body 1. The oil sump 11 is connected to the separation chamber 31 through the oil return pipe 34, and the intake chamber is connected to the separation chamber through the refrigerant inlet pipe 33. Among them, during the operation of the system, the separation inlet pipe 32 accesses the refrigerant from the system and transports it into the separation chamber 31. Since the output end of the separation inlet pipe 32 in the separation chamber 31 and the input end of the refrigerant inlet pipe 33 are arranged to avoid each other, therefore, the liquid oil ejected from the refrigerant inlet pipe 33 will not enter the input end of the refrigerant inlet pipe 33, but will splash onto the inner wall of the separation chamber 31 or the outer wall of the refrigerant inlet pipe 33, and gradually flow along the position of the oil return pipe 34 on one side of the separation chamber 31 by factors such as gravity. There is no protrusion at the docking position of the oil return pipe 34 and the separation chamber 31, so that the accumulated oil can directly flow out from the oil return pipe 34 and finally flow into the oil sump 11 of the compressor body 1 to gather. At the same time, the refrigerant in the refrigerant exists in a gaseous form and directly diffuses into the input end of the refrigerant inlet pipe 33 and enters the intake chamber of the compressor body 1 through the refrigerant inlet pipe 33. Thus, the separation of the refrigerant is achieved.

[0043] In the above structure, the gas-liquid separator 3 can be arranged on one side of the compressor body 1 to provide the function of separating oil from the refrigerant. Specifically, since the structure of the gas-liquid separator 3 is arranged adjacent to the compressor body 1, therefore, the path of the refrigerant inlet pipe 32 of the gas-liquid separator 3 communicating with the intake chamber is shortened. In some embodiments, the necessary connecting pipe after the separation chamber 31 in the split setting can be saved, the material input is reduced, and at the same time the number of leakage points is reduced, thereby reducing the leakage probability during the refrigerant transportation process.

[0044] Based on the above structure, as Figure 1 shown, the compressor body 1 is provided with a functional part for piston compression. In Figure 1at the middle and right positions, and an oil sump 11 for containing liquid oil. At Figure 1 the left position, wherein the oil sump 11 can be a cavity with a certain volume. In this embodiment, the oil sump 11 covers approximately one-third to one-tenth of the volume of the compressor body 1 to allow sufficient volume of liquid oil, etc. to be inhaled and compressed.

[0045] In this embodiment, an intake cavity for containing refrigerant can be provided on the same side of the oil sump 11. The structure of the intake cavity and the oil sump 11 together form a gas-liquid accommodation area at the left position of the compressor body 1 as Figure 1 shown, which is separated from the compression function area in the middle and right areas, having high structural stability.

[0046] The controller 2 is arranged on Figure 1 one side of the oil sump 11 on the left. The controller 2 is adjacent to the controller cover plate and is combined with the housing on one side of the oil sump 11 in a mechanically connected manner by means of the controller cover plate. Specifically, in addition to the fastening connection method, the installation method of the controller cover plate can also include, but is not limited to, glue connection, welding or snap connection, etc.

[0047] In the configuration of the gas-liquid separator 3, the separation chamber 31 is set as a cylindrical structure with circular cross-sections at both ends, and its inner wall has a relatively smooth geometric curve, which helps the flow of liquid oil. Specifically, in some other embodiments, it can also be set as a regular rectangle according to needs to achieve better sealing effect, lower cost, and closer connection and cooperation with the compressor body 1.

[0048] The separation inlet pipe 32 and the refrigerant inlet pipe 33 are structured as regular tubes. The separation inlet pipe 32 and the refrigerant inlet pipe 33 can turn at a preset angle at some positions according to the needs of the pipeline layout to achieve docking with external pipelines or with the inside of the separation chamber 31.

[0049] In this embodiment, the oil return pipe 34 is set as a regular tube thinner than the separation inlet pipe 32 and the refrigerant inlet pipe 33, and in this embodiment, the oil return pipe 34 also bends at the middle part according to the need to dock with the oil sump 11.

[0050] The position of the oil return pipe 34 in this embodiment can be set on the side relatively close to the bottom of the separation chamber 31 and in the area far from the ends of the separation inlet pipe 32 and the refrigerant inlet pipe 33, which helps to more evenly discharge the overall liquid oil in the separation chamber 31.

[0051] Taking one embodiment as an example, the output end of the separation inlet pipe 32 and the input end of the refrigerant inlet pipe 33 can be arranged in parallel, but they intersect with each other, so that mutual avoidance between the output end of the separation inlet pipe 32 and the input end of the refrigerant inlet pipe 33 can still be achieved.

[0052] In another embodiment, in the electric compressor with an integrated gas-liquid separator of the present invention, there is an angle other than 0 degrees or 180 degrees between the output end of the separation inlet pipe 32 and the input end of the refrigerant inlet pipe 33. That is to say, the orientation of the output end of the separation inlet pipe 32 is directly set to avoid the orientation of the input end of the refrigerant inlet pipe 33.

[0053] In this embodiment, considering the requirements of cost, structural layout and structural strength, the main body parts at the middle positions of the separation inlet pipe 32 and the refrigerant inlet pipe 33 are both set as straight lines running through the separation chamber 31 in parallel. Therefore, the output end of the separation inlet pipe 32 can present a bent arc, or the input end of the refrigerant inlet pipe 33 can present a bent arc, so as to meet the need of mutual avoidance.

[0054] The following are some partial embodiments derived from the above structure with an angle of arc-shaped bending:

[0055] Embodiment 1

[0056] As Figure 1 shown, the gas-liquid separator 3 is installed on the outer wall surface of the compressor body 1. In this embodiment, the input end of the refrigerant inlet pipe 33 is provided with a plurality of branch inlets, and the orientations of the branch inlets of each refrigerant inlet pipe 33 are different. The branch inlets of the refrigerant inlet pipe 33 are provided with two, and the angle between the two branch inlets of the refrigerant inlet pipe 33 is 180 degrees. The two branch inlets of the refrigerant inlet pipe 33 extend perpendicular to the extension direction of the output end of the separation inlet pipe 32. In actual use, the oil in the refrigerant inlet pipe 33 is directly sprayed on the pipe wall between the two branches at the input end of the refrigerant inlet pipe 33, and after dripping into the separation chamber 31, it flows along the inner wall surface of the separation chamber 31 and is discharged into the oil return pipe 34 on one side of the bottom. The gas-liquid separator 3 in this embodiment is directly installed outside the compressor body 1, which is convenient for maintenance and installation and has a lower cost.

[0057] Embodiment 2

[0058] As Figure 2As shown, the gas-liquid separator 3 is installed on the inner wall surface of the compressor body 1, where the separation chamber 31 is integrally formed with the compressor body 1. In this embodiment, the output end of the separation inlet pipe 32 is provided with multiple branch outlets, and the orientations of the branch outlets of each separation inlet pipe 32 are different. The branch outlets of the separation inlet pipe 32 are provided with two, and the included angle between the two branch outlets of the separation inlet pipe 32 is 180 degrees. The two branch outlets of the separation inlet pipe 32 extend perpendicular to the extension direction of the input end of the refrigerant inlet pipe 33. In actual use, the oil in the separation inlet pipe 32 is directly sprayed on the inner walls on both the upper and lower sides of the separation chamber 31, and flows along the inner wall surface of the separation chamber 31 to the oil return pipe 34 on one side of the bottom and is discharged. The shape of the separation chamber 31 in this embodiment fits the outer skin of the compressor body 1. On the one hand, it can ensure the stability of the connection. On the other hand, it saves the space occupied by separate arrangement, is suitable for small-space scenarios. In addition, the gas-liquid separator 3 can be directly positioned by the compressor body 1, reducing the complexity of the installation of the gas-liquid separator 3 and improving the installation efficiency.

[0059] Embodiment 3

[0060] As Figure 3 shown, as Figure 1 shown, the gas-liquid separator 3 is installed on the inner wall surface of the compressor body 1, that is, the gas-liquid separator 3 is directly arranged in the separation chamber 31. In this embodiment, the input end of the refrigerant inlet pipe 33 is provided with multiple branch inlets, and the orientations of the branch inlets of each refrigerant inlet pipe 33 are different. The branch inlets of the refrigerant inlet pipe 33 are provided with two, and the included angle between the two branch inlets of the refrigerant inlet pipe 33 is 180 degrees. The two branch inlets of the refrigerant inlet pipe 33 extend perpendicular to the extension direction of the output end of the separation inlet pipe 32. In actual use, the oil in the refrigerant inlet pipe 33 is directly sprayed on the pipe wall between the two branches at the input end of the refrigerant inlet pipe 33, and after dripping into the separation chamber 31, it flows along the inner wall surface of the separation chamber 31 to the oil return pipe 34 on one side of the bottom and is discharged. In this embodiment, the overall structure of the gas-liquid separator 3 is directly installed inside the separation chamber 31. Therefore, there is no need to additionally set up a reinforcement component, and the airtightness can be ensured by the housing body of the compressor body 1.

[0061] Embodiment 4

[0062] As Figure 4As shown, the gas-liquid separator 3 is installed at the position between the compressor body 1 and the controller 2. Among them, the separation chamber is integrally formed with the compressor body. In this embodiment, the output end of the separation inlet pipe 32 is provided with a plurality of branch outlets, and the orientations of the branch outlets of each separation inlet pipe 32 are different. The branch outlets of the separation inlet pipe 32 are provided with two, and the included angle between the two branch outlets of the separation inlet pipe 32 is 180 degrees. The two branch outlets of the separation inlet pipe 32 extend perpendicular to the extension direction of the input end of the refrigerant inlet pipe 33. During the actual implementation of this embodiment, the separation chamber 31 can be directly communicated with the intake chamber of the compressor body 1, which saves more materials, eliminates the need for a separate connecting pipe that is necessary for separate settings, and can form a sealed protection for the structure of the gas-liquid separator 3 by means of the controller 2 itself.

[0063] Furthermore, the gas-liquid separator 3 further includes an isolation net 35. The isolation net 35 is arranged in the separation chamber 31, and the output end of the separation inlet pipe 32 passes through the isolation net 35. The isolation net 35 is used to isolate the separation chamber 31 into two sub-spaces, and the oil return pipe 34 is arranged on the side of the isolation net 35 away from the refrigerant inlet pipe 33. With the above structure, during the process of the oil flowing downstream, it must pass through the filtering of the isolation net 35 structure before it can flow into the oil return pipe 34 on one side of the isolation net 35. Therefore, the purity of the oil can be guaranteed, and the refrigerant structure can be prevented from entering the oil return pipe 34.

[0064] The content disclosed above is only the preferred feasible embodiment of the present invention, and does not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the content of the specification and drawings of the present invention are included in the scope of the patent application of the present invention.

[0065] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0066] Although the present application is depicted through embodiments, those of ordinary skill in the art know that the present application has many deformations and changes without departing from the spirit of the present application. It is hoped that the appended embodiments include these deformations and changes without departing from the present application.

Claims

1. An electric compressor with an integrated gas-liquid separator, characterized in that: The electric compressor with integrated gas-liquid separator comprises: A compressor body, wherein the compressor body is provided with an oil pool; A controller, wherein the controller is mounted on one side of the compressor body; A gas-liquid separator, the gas-liquid separator comprises a separation chamber, a separation air inlet pipe, a refrigerant air inlet pipe, and an oil return pipe, the input end of the separation air inlet pipe is used to inject refrigerant, the output end of the separation air inlet pipe is arranged in the separation chamber, the input end of the refrigerant air inlet pipe is used to lead out the separated refrigerant, the output end of the refrigerant air inlet pipe is arranged in the separation chamber, and the oil return pipe is connected between the separation chamber and the oil pool; wherein the output end of the separation air inlet pipe is arranged to avoid the input end of the refrigerant air inlet pipe, so that the oil in the refrigerant can be sprayed onto the inner wall of the separation chamber and flow out along the oil return pipe; Wherein, the gas-liquid separator is installed on one side of the compressor body.

2. The electric compressor with integrated gas-liquid separator according to claim 1, characterized in that: An angle between the output end of the separation air inlet pipe and the input end of the refrigerant air inlet pipe is not 0 degrees or 180 degrees.

3. The electric compressor with integrated gas-liquid separator according to claim 2, characterized in that: The output end of the separation air intake pipe is arranged as a plurality of branch outlets, wherein the direction of each branch outlet of the separation air intake pipe is different.

4. The electric compressor with integrated gas-liquid separator according to claim 3, characterized in that: The branch outlets of the separation air intake pipe are set to two, the angle between the two branch outlets of the separation air intake pipe is 180 degrees, and the branch outlets of the two separation air intake pipes extend perpendicularly to the extension direction of the input end of the refrigerant air intake pipe.

5. The electric compressor with integrated gas-liquid separator according to claim 2, characterized in that: The input end of the refrigerant air inlet pipe is configured as a plurality of branch inlets, wherein the orientation of each branch inlet of the refrigerant air inlet pipe is different.

6. The electric compressor with integrated gas-liquid separator according to claim 3, characterized in that: The refrigerant air inlet pipe is provided with two branch inlets, the angle between the two branch inlets of the refrigerant air inlet pipe is 180 degrees, and the two branch inlets of the refrigerant air inlet pipe extend perpendicularly to the extension direction of the output end of the separation air inlet pipe.

7. The electric compressor with integrated gas-liquid separator according to claim 1, characterized in that: The gas-liquid separator also includes an isolation net, which is arranged in the separation chamber, and the output end of the separation air inlet pipe is penetrated by the isolation net, and the isolation net is used to isolate the separation chamber into two sub-spaces, and the oil return pipe is arranged on the side of the isolation net away from the refrigerant air inlet pipe.

8. The electric compressor with integrated gas-liquid separator according to claim 1, characterized in that: The gas-liquid separator is installed on the outer wall surface of the compressor body.

9. The electric compressor with integrated gas-liquid separator according to claim 1, characterized in that: The gas-liquid separator is mounted on the inner wall surface of the compressor body, wherein the separation chamber is integrally formed with the compressor body.

10. The electric compressor with integrated gas-liquid separator according to claim 1, characterized in that: The gas-liquid separator is installed at a position between the compressor body and the controller, wherein the separation chamber is integrally formed with the compressor body.

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