Compressor rear housing and scroll compressor including the same

Abstract

The present invention provides a compressor rear housing and a scroll compressor including the same, wherein the compressor rear housing includes a rear housing cover, a mounting plate, an intake air passage, and a secondary bearing seat arranged on the side of the intake air passage away from the rear housing cover; the rear housing cover and the mounting plate form a first cavity that can accommodate a compressor controller; the intake air passage is a tubular structure surrounded by a part of the mounting plate and a pipe wall, a port of the intake air passage is used to connect to the intake port of the compressor, and the pipe wall is provided with at least one first exhaust port. The compressor rear housing of the present invention is provided with a first cavity in which a controller can be installed, and at the same time, the mounting plate of the first cavity, as a part of the intake air passage, can effectively dissipate heat for the controller installed thereon, thereby improving the service life and overall reliability of the compressor.

Description

Technical Field

[0001] The present invention relates to the field of compressors, and in particular to a compressor rear housing and a scroll compressor comprising the same. Background Art

[0002] Due to the structural characteristics of electric scroll compressors, they have been widely used in electric commercial vehicles and passenger cars. For electric scroll compressors, its main components are: housing, motor, dynamic and static disk, controller, etc. In previous product feedback, it was found that the failure rate of the control board was relatively prominent. The control board is composed of electronic components, and the electronic components are particularly affected by temperature. Therefore, the first thing that needs to be solved for the scroll compressor is the heat dissipation problem of its control board.

[0003] In the existing scroll compressor, since the suction port is located on the compressor shell, the evaporated refrigerant vapor enters the compressor suction cavity through the suction port. The refrigerant vapor in the suction cavity dissipates itself, so that the control board in the control board mounting cavity conducts heat through the control board mounting surface, so as to achieve the purpose of cooling the control board in this way. The shortcoming is that during suction, the low-temperature evaporated gas directly passes through the compressor cavity, passes through the stator and rotor, and is re-inhaled into the dynamic and static disks to be discharged from the compressor, and does not actively allow the low-temperature evaporated gas to stay at the control board to provide more cooling capacity for the control board to achieve better heat dissipation.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In view of the problems in the prior art, an object of the present invention is to provide a compressor rear housing and a scroll compressor including the same, wherein the compressor rear housing can effectively cool a controller installed therein, improve the stability and performance of the controller, and thus improve the performance and stability of the compressor.

[0006] A first aspect of the present invention provides a compressor rear housing, comprising a rear housing cover, a mounting plate, an air intake passage, and a secondary bearing seat disposed on a side of the air intake passage away from the rear housing cover;

[0007] The rear shell cover and the mounting plate form a first cavity capable of accommodating a compressor controller;

[0008] The suction flow channel is a tubular structure formed by a portion of the mounting plate and a tube wall. A port of the suction flow channel is used to connect to the suction port of the compressor, and the tube wall is provided with at least one first exhaust port.

[0009] According to the first aspect of the present invention, a heat dissipation structure is provided on a side of the mounting plate facing away from the rear housing cover.

[0010] According to a first aspect of the present invention, the heat dissipation structure includes a plurality of heat dissipation fins in an arc structure.

[0011] According to the first aspect of the present invention, a projection of the intake air passage on the rear housing cover at least partially overlaps with a projection of the auxiliary bearing seat on the rear housing cover.

[0012] According to the first aspect of the present invention, the at least one first exhaust port is disposed on the tube wall close to another end of the suction flow passage.

[0013] According to the first aspect of the present invention, the cross section of the suction flow passage is D-shaped or rectangular.

[0014] According to the first aspect of the present invention, the compressor rear housing further comprises a rotor vane disposed in the intake air passage, wherein the rotor vane extends spirally along an inner surface of the intake air passage.

[0015] According to the first aspect of the present invention, the compressor rear housing further comprises a cover plate arranged on the side of the intake air passage away from the mounting plate, the cover plate and the mounting plate forming a second cavity and the cover plate being provided with at least one second exhaust port.

[0016] According to the first aspect of the present invention, the at least one second exhaust port is disposed on an opposite side of the at least one first exhaust port.

[0017] According to the first aspect of the present invention, a port of the air intake passage is disposed on the side wall of the rear shell cover, and a stepped connecting piece is disposed at the port.

[0018] A second aspect of the present invention provides a scroll compressor, comprising the compressor rear housing.

[0019] According to a second aspect of the present invention, the scroll compressor further comprises at least one controller, and a heat dissipation surface of the at least one controller is in conflict with the mounting plate.

[0020] The compressor rear housing of the present invention is provided with a first cavity for installing a controller. At the same time, the mounting plate of the first cavity serves as a part of the intake air passage and can effectively dissipate heat for the controller installed thereon, thereby improving the service life and overall reliability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes and advantages of the present invention will become more apparent. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same figure numbers in the figures represent the same or similar parts, and their repeated descriptions will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0022] Figures 1 to 4 They are respectively a three-dimensional structural diagram of the compressor rear housing of the first embodiment of the present invention, a top view of the auxiliary bearing seat side, a side view, and a top view of the first cavity side;

[0023] Figures 5 to 7 They are respectively a three-dimensional structural diagram of a compressor rear housing according to a second embodiment of the present invention, a top view of the auxiliary bearing seat side, and a top view of the first cavity side;

[0024] Figure 8 A schematic structural diagram of a cover plate according to an embodiment of the present invention;

[0025] Fig. 9 FIG. 4 is a schematic structural diagram of an inhalation air duct according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the disclosure will be more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0027] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of this specification. Moreover, the specific features, structures, materials or characteristics represented may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples represented in this specification without contradiction.

[0028] Throughout the specification, when it is said that a device is "connected" to another device, this includes not only the situation of "direct connection" but also the situation of "indirect connection" by placing other elements therebetween. Terms indicating relative spaces such as "below" and "above" may be used to more easily explain the relationship of one device illustrated in the accompanying drawings relative to another device. Such terms refer not only to the meanings indicated in the accompanying drawings, but also to other meanings or operations of the device in use. For example, if the device in the accompanying drawings is turned over, a device that was described as being "below" other devices is described as being "above" other devices. Therefore, the exemplary term "below" includes both above and below. The device can be rotated 90° or other angles, and the terms representing relative spaces are interpreted accordingly.

[0029] Although the terms first, second, etc. are used to represent various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate that there are the described features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0030] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which this specification belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with the relevant technical literature and the contents of the current disclosure, and unless defined, shall not be overly interpreted as ideal or very formal meanings.

[0031] The present invention provides a compressor rear housing and a scroll compressor including the same, wherein the compressor rear housing includes a rear housing cover, a mounting plate, an intake air passage, and a secondary bearing seat arranged on the side of the intake air passage away from the rear housing cover; the rear housing cover and the mounting plate form a first cavity that can accommodate a controller; the intake air passage is a tubular structure surrounded by a part of the mounting plate and a pipe wall, a port of the intake air passage is used to connect to the intake port of the compressor, and the pipe wall is provided with at least one first exhaust port. The compressor rear housing of the present invention is provided with a first cavity in which a controller can be installed, and at the same time, the mounting plate of the first cavity, as a part of the intake air passage, can effectively dissipate heat for the controller installed thereon, thereby improving the service life and overall reliability of the compressor.

[0032] The structure and working principle of the compressor rear housing and the scroll compressor including the same of the present invention are further explained below in conjunction with the accompanying drawings and specific embodiments. It can be understood that the various specific embodiments are not intended to limit the protection scope of the present invention.

[0033] Figures 1 to 4 They are respectively a three-dimensional structural diagram of the compressor rear housing of the first embodiment of the present invention, a top view on the auxiliary bearing seat side, a side view, and a top view on the first cavity side. Specifically, the compressor rear housing includes a rear housing cover 1, a mounting plate 2, an intake air passage 3, and an auxiliary bearing seat 4 arranged on a side of the intake air passage 3 away from the rear housing cover 1;

[0034] The rear housing cover 1 and the mounting plate 2 form a first cavity that can accommodate the compressor controller;

[0035] The suction flow channel 3 is a tubular structure formed by a part of the mounting plate 2 and a tube wall 31. A port 32 of the suction flow channel 3 is used to connect with the suction port of the compressor. Usually, the port 32 of the suction flow channel 3 can be arranged on the side wall of the rear shell cover 1, and a stepped connector 321 can be arranged at the port 32. A plurality of bolt holes can be arranged on the connector 321, and the system pipeline of the compressor can be connected to the connector 321 by bolt connection or the like. At this time, the system pipeline and the suction flow channel 3 are connected to form a passage, and the refrigerant vapor passes through the system pipeline and the port 32 in sequence and then enters the suction flow channel 3 of the rear shell of the compressor.

[0036] The tube wall 31 is provided with at least one first exhaust port 311 .

[0037] When a compressor controller is installed on the mounting plate 2 of the compressor rear shell of the present invention, when the compressor is running, the refrigerant vapor enters the suction flow duct 3 from the system pipeline, and then enters the cavity formed by the rear shell and the motor from the first exhaust port 311 and flows in the direction of the motor of the compressor. The suction flow duct 3 can effectively cool the compressor controller installed thereon when passing through the mounting plate 2, which well solves the heat dissipation problem of the control board, effectively reduces the failure rate of the control board, and thus improves the stability of the control board and the compressor.

[0038] In order to improve the heat dissipation effect of the mounting plate 2, the intake air duct 3 of the tubular structure surrounded by a part of the mounting plate 2 and the tube wall 31 should be as long as possible, and the projection of the intake air duct 3 on the rear shell cover 1 at least partially overlaps with the projection of the auxiliary bearing seat 4 on the rear shell cover 1, that is, the intake air duct 3 is as close to the auxiliary bearing seat 4 as possible. In the first embodiment, the intake air duct 3 is arranged at the auxiliary bearing seat 4, and the intake air duct 3 is basically symmetrical with respect to the auxiliary bearing seat 4.

[0039] At the same time, due to the vortex suction structure, the refrigerant vapor is discharged from at least one first exhaust port 311 and flows toward the motor. In the first embodiment, the at least one first exhaust port 311 is arranged on the tube wall 31 close to the other end of the suction flow channel 3, that is, on the other side of the central axis z that divides the suction flow channel 3 into two ends. Figure 2 As shown in the figure, the port 32 is located on the left side of the secondary bearing seat 4 (central axis z), and at least one first exhaust port 311 is located on the right side of the secondary bearing seat 4 (central axis z). The shape of the first exhaust port 311 is not limited, and can be a strip-shaped gap set on the tube wall 31, or a plurality of circular or other shaped through holes. Preferably, at least one first exhaust port 311 is set on the tube wall 31 at the connection with the mounting plate 2.

[0040] In order to further improve the heat dissipation effect of the mounting plate 2, the cross section of the air intake passage 3 is D-shaped or rectangular. Figure 3 As shown in the side view, the cross section of the suction flow channel 3 is D-shaped, and the tube wall 31 can be a part of the side wall of a cylinder or an elliptical cylinder. Preferably, the mounting plate 2 and the tube wall 31 form a semi-cylinder. When the tube wall 31 is a part of the side wall of the elliptical cylinder, the mounting plate 2 can be arranged at the long axis of the elliptical cylinder. At this time, the contact area between the mounting plate 2 and the refrigerant vapor in the suction flow channel 3 is the largest, and the heat dissipation effect of the mounting plate 2 is the best. Similarly, the cross section of the suction flow channel 3 can be rectangular, or other polygonal shapes.

[0041] In some embodiments, a heat dissipation structure may be further provided on the side of the mounting plate 2 facing away from the rear housing cover 1. Figure 1 and Figure 2As shown, the heat dissipation structure can be arranged on the side of the first exhaust port 311 of the rear shell cover 1, that is, on the right side of the auxiliary bearing seat 4 (central axis z) of the rear shell cover 1. The heat dissipation structure includes a plurality of heat sinks 21 with circular arc structures. The heat sinks 21 with multiple circular arc structures can form a multi-layer circular ring structure with the central axis of the auxiliary bearing seat as the center of the circle. There are openings between two adjacent heat sinks 21 in the same layer of circular rings. The openings between the heat sinks 21 of this layer and the openings between the heat sinks 21 of the adjacent layer can be staggered, that is, the openings between the heat sinks 21 of two adjacent layers are as far away as possible. The labyrinth structure formed in this way allows the refrigerant vapor discharged from the first exhaust port 311 to the heat dissipation structure to flow in the labyrinth heat sink 21 as much as possible to increase the cooling flow area, so that the refrigerant vapor and the first chamber or the mounting plate generate more heat exchange, and the cooling effect is better. In the first embodiment, since the heat dissipation structure is arranged on the right side of the auxiliary bearing seat 4 of the rear shell cover 1, correspondingly, when the compressor controller is installed on one side of the first cavity of the rear shell cover 1, the controller is installed on the back of the heat dissipation structure, that is, Figure 4 On the left side of the auxiliary bearing seat 4.

[0042] Figures 5 to 7 They are respectively a three-dimensional structural diagram of the compressor rear shell of the second embodiment of the present invention, a top view of the auxiliary bearing seat side and a top view of the first cavity side. Different from the first embodiment, the entire side away from the rear shell cover 1 in the second embodiment is provided with a heat dissipation structure, and accordingly, the rear shell cover 1 can be a flat plate on one side of the first cavity. The expansion of the heat dissipation structure allows the controller to be installed on the entire flat plate.

[0043] In some other embodiments, the compressor rear housing further includes a cover plate 5 disposed on the side of the suction air passage 3 away from the mounting plate 2. Figure 8 This is a schematic diagram of the structure of a cover plate of an embodiment of the present invention, wherein the cover plate 5 and the mounting plate 2 form a second cavity and the cover plate is provided with at least one second exhaust port 51. Of course, the cover plate 5 is also provided with a through hole 52 through which the auxiliary bearing seat 4 can penetrate. It can be understood that, at this time, the suction flow channel 3 and the heat dissipation structure are accommodated in the second cavity between the cover plate 5 and the mounting plate 2. The advantage of the rear housing of the compressor provided with the cover plate 5 is that the refrigerant vapor discharged from the first exhaust port will not flow directly to the motor direction of the compressor due to the vortex suction structure.

[0044] Similarly, in order to increase the cooling flow area of ​​the refrigerant vapor discharged from the first exhaust port, the at least one second exhaust port 51 can be arranged on the opposite side of the at least one first exhaust port 311, that is, when the at least one first exhaust port 311 is arranged on one side of the central axis z of the suction flow channel 3, the at least one second exhaust port 51 is arranged on the other side of the central axis z of the suction flow channel 3. The second exhaust port 51 can be a strip-shaped gap arranged on the cover plate 5, or it can be a plurality of circular or other shaped holes.

[0045] In some embodiments, the compressor rear housing further includes a rotor 33 disposed in the suction air passage 3. Fig. 9 The structure diagram of the suction flow passage of one embodiment of the present invention is shown in FIG. The vortex vane 33 extends spirally along the inner surface of the suction flow passage 3. The vortex vane 33 can increase the time for the refrigerant to pass through the suction flow passage 3, thereby increasing the cooling effect of the suction flow passage 3. The vortex vane 33 can be made of plastic or metal material.

[0046] The present invention also provides a scroll compressor, including the compressor rear housing. The scroll compressor also includes at least one controller, and the heat dissipation surface of the at least one controller conflicts with the mounting plate 2. In the compressor of the present invention, before the refrigerant enters the motor, it passes through the suction flow channel 3 and the second chamber in sequence, so that the refrigerant fully exchanges heat with the first cavity and the mounting plate, thereby cooling the at least one controller on the mounting plate 2. At the same time, the first cavity where the control board is installed is not connected to the suction flow channel, so that it is impossible for the refrigerant to leak into the first cavity of the control board and cause the safety risk caused by the leakage of the control board. The compressor of the present invention has better overall performance and stability.

[0047] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A compressor rear housing, characterized in that: It includes a rear shell cover, a mounting plate, an air intake passage, and a secondary bearing seat arranged on a side of the air intake passage away from the rear shell cover; The rear shell cover and the mounting plate form a first cavity capable of accommodating a compressor controller; The suction flow channel is a tubular structure formed by a portion of the mounting plate and a tube wall, a port of the suction flow channel is used to connect to the suction port of the compressor, and the tube wall is provided with at least one first exhaust port; The projection of the air intake passage on the rear housing cover at least partially overlaps with the projection of the auxiliary bearing seat on the rear housing cover; The at least one first exhaust port is disposed on the tube wall near another end of the suction flow channel; A heat dissipation structure is provided on a side of the mounting plate away from the rear shell cover; The heat dissipation structure is disposed on the at least one first exhaust port side of the rear shell cover; The heat dissipation structure comprises a plurality of heat dissipation fins with circular arc structures; The heat sinks of the plurality of arc structures are formed with the central axis of the auxiliary bearing seat as the center of the circle to form a multi-layer circular ring structure, and there is an opening between two adjacent heat sinks in the same layer of circular rings; It also includes a cover plate disposed on the side of the suction air passage away from the mounting plate, the cover plate and the mounting plate forming a second cavity and the cover plate is provided with at least one second exhaust port; The at least one second exhaust port is disposed at an opposite side of the at least one first exhaust port.

2. The compressor rear housing according to claim 1, characterized in that: The cross section of the suction flow channel is D-shaped or rectangular.

3. The compressor rear housing according to claim 1, characterized in that: It also includes a rotating vane disposed in the inhalation flow passage, wherein the rotating vane extends spirally along the inner surface of the inhalation flow passage.

4. The compressor rear housing according to claim 1, characterized in that: A port of the air intake passage is arranged on the side wall of the rear shell cover, and a step-shaped connecting piece is arranged at the port.

5. A scroll compressor, characterized in that: It comprises a compressor rear housing as claimed in any one of claims 1 to 4.

6. The scroll compressor according to claim 5, characterized in that: It also includes at least one controller, and the heat dissipation surface of the at least one controller conflicts with the mounting plate.

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