A compressor

Abstract

The present invention provides a compressor, comprising: a rear shell, wherein a first side of the rear shell forms a space for accommodating a controller, a secondary bearing seat is provided in the center of the second side, and an air intake port and a terminal are respectively distributed on both sides centered on the secondary bearing seat; a plurality of heat dissipation ribs are respectively provided on both sides of the secondary bearing seat; a guide cover covering the second side of the rear shell, wherein the guide cover, the second side of the rear shell, and the plurality of heat dissipation ribs together form a plurality of refrigerant flow channels that guide the refrigerant from the air intake port to the terminal. The present invention can control the flow direction of the refrigerant sucked into the compressor by adding a guide structure, so that the low-temperature, low-pressure refrigerant flows through the heat dissipation rib area of the rear shell, thereby achieving convection heat exchange between the low-temperature refrigerant and the high-temperature rear shell, indirectly dissipating heat for the controller and improving the reliability of the controller under harsh working conditions.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration equipment, in particular to a compressor. Background Art

[0002] With the continuous development of the new energy electric vehicle industry, automotive scroll compressors are facing new opportunities and challenges. Currently, automotive electric scroll compressors utilize an integrated mechanical, electrical, hydraulic, and control structure. The mainstream controller installation solution places it perpendicular to the compressor axis on the rear housing. Heat transferred from the controller to the rear housing is removed by the intake of low-temperature, low-pressure refrigerant, thereby indirectly cooling the controller. As the compressor operating range continues to expand, the controller faces the risk of overheating and failure caused by high power and high current.

[0003] Patent CN115653895A discloses a compressor whose rear shell assembly includes a shroud, and its rear shell assembly includes a rear shell, a shroud, screws, etc. This solution introduces the gas sucked in by the compressor into the heat dissipation cavity surrounded by the shroud and the rear shell. The gas cools the controller power module and the auxiliary bearing in the heat dissipation cavity, and then is discharged into the compressor through the air outlet. Patent CN115653895A is limited by the external structure of the shroud. The gas in the heat dissipation cavity is discharged into the compressor along the compressor axis through the shroud outlet. The area outside the outer diameter of the shroud, especially the area on the opposite side of the air inlet, cannot fully transfer heat with the inhaled low-temperature, low-pressure refrigerant, resulting in the controller installation chamber being unable to achieve the best cooling effect. Secondly, the use of aluminum or cast iron for the shroud not only increases the weight of the compressor, but also requires ensuring the machining accuracy of the bolt holes, bolt fastening surfaces and other mating surfaces, which will increase the additional processing time and cost.

[0004] Therefore, the present invention provides a compressor that improves the cooling effect of the compressor controller. Summary of the Invention

[0005] In response to the problems in the prior art, the purpose of the present invention is to provide a compressor that overcomes the difficulties of the prior art. It can control the flow direction of the refrigerant sucked into the compressor by adding a guide structure, so that the low-temperature, low-pressure refrigerant flows through the heat dissipation rib area of the rear shell, thereby realizing convection heat exchange between the low-temperature refrigerant and the high-temperature rear shell, indirectly dissipating the heat of the controller and improving the reliability of the controller under harsh working conditions.

[0006] An embodiment of the present invention provides a compressor, comprising:

[0007] A rear shell, wherein a first side of the rear shell forms a space for accommodating the controller, a secondary bearing seat is provided in the center of the second side, and an air intake and a terminal are respectively distributed on both sides of the secondary bearing seat;

[0008] A plurality of heat dissipation ribs are respectively arranged on both sides of the auxiliary bearing seat; and

[0009] The air guide cover covers the second side of the rear shell. The air guide cover, the second side of the rear shell and the plurality of heat dissipation ribs together form a plurality of refrigerant flow channels for guiding the refrigerant to flow from the air intake to the terminal.

[0010] Preferably, the air guide cover comprises:

[0011] annular plate;

[0012] an annular wall, provided on the outer edge of the annular plate, protruding toward a side away from the rear shell, and forming an annular drainage channel between the annular wall and the inner wall of the rear shell;

[0013] an annular shoulder, provided on the inner edge of the annular plate and protruding toward a side away from the rear shell;

[0014] A radial gas flow limiting baffle is provided at the upper edge of the annular wall and extends to the inner wall of the rear shell, so as to seal the air intake inlet within the annular drainage channel and guide the refrigerant to flow into the annular drainage channel.

[0015] Preferably, the guide cover also includes a plurality of circumferential gas flow limiting baffles, which protrude radially outward from the outer periphery of the annular wall. The circumferential gas flow limiting baffles divide the annular diversion channel into a plurality of sub-channels, and the sub-channels are respectively connected to the corresponding refrigerant channels.

[0016] Preferably, the annular shoulder covers the auxiliary bearing seat and is in surface contact with the upper end surface and outer side surface of the auxiliary bearing seat.

[0017] Preferably, the height of the annular drainage channel is greater than the height of the refrigerant flow channel.

[0018] Preferably, the width of the refrigerant flow channel is greater than the height of the refrigerant flow channel.

[0019] Preferably, the refrigerant flow channel covers the area on the second side of the rear shell except the auxiliary bearing seat, and one end of the refrigerant flow channel is connected to the air intake port, and the other end is connected to the terminal.

[0020] Preferably, the refrigerant flow channels are straight flow channels, and the refrigerant flow channels are parallel to each other.

[0021] Preferably, the refrigerant flow channel is a plurality of concentric annular flow channels with different diameters centered on the auxiliary bearing seat.

[0022] Preferably, the annular shoulder is provided with a plurality of first limiting pin holes, the auxiliary bearing seat is provided with a plurality of second limiting pin holes, and the annular shoulder and the auxiliary bearing seat are connected by limiting pins.

[0023] The compressor of the present invention can control the flow direction of the refrigerant sucked into the compressor by adding a guide structure, so that the low-temperature, low-pressure refrigerant flows through the heat dissipation rib area of the rear shell, realizing convection heat exchange between the low-temperature refrigerant and the high-temperature rear shell, indirectly playing a role in dissipating heat for the controller, and improving the reliability of the controller under harsh working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0025] Figure 1 It is a cross-sectional view of the compressor of the present invention.

[0026] Figure 2 It is a schematic diagram of the combination of the rear shell and the air guide cover in the compressor of the present invention.

[0027] Figure 3 yes Figure 2 Cross-sectional view along the AA axis.

[0028] Figure 4 yes Figure 2 Cross-sectional view along the BB direction.

[0029] Figure 5 It is a three-dimensional diagram of the air guide cover in the compressor of the present invention from a first perspective.

[0030] Figure 6 It is a stereoscopic view of the air guide cover in the compressor of the present invention from a second viewing angle.

[0031] Figure 7 It is a schematic diagram of the rear shell of the compressor of the present invention.

[0032] Figure 8 It is a cross-sectional view of the rear shell of the compressor of the present invention.

[0033] Reference numerals

[0034] 1 front shell

[0035] 2 moving disk

[0036] 3 shell

[0037] 4 Back cover

[0038] 41 auxiliary bearing seat

[0039] 5. Rear cover

[0040] 6 Air deflector

[0041] 61 Circumferential gas flow limiting baffle

[0042] 62 Circular Shoulder

[0043] 63 Radial gas flow restriction baffle

[0044] 64 First limit pin hole

[0045] 65 Annular wall

[0046] 66 Ring Plate

[0047] 7 pairs of bearings

[0048] 8 Controller housing

[0049] 9 Motor

[0050] 10 Crankshaft

[0051] 11 Quiet disk

[0052] 12 Inlet

[0053] 13 Binding post mounting area

[0054] 14 Secondary bearing installation area

[0055] 15 Limit pin

[0056] 16 Second limit pin hole

[0057] 17 heat dissipation ribs DETAILED DESCRIPTION

[0058] The following describes the embodiments of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through different specific embodiments. The details in the present application can also be modified or changed according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other unless they conflict.

[0059] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in many different forms and is not limited to the embodiments described herein.

[0060] In the description of this application, reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this application, as well as features of different embodiments or examples, unless otherwise contradictory.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include at least one such feature. In the context of this application, "plurality" means two or more, unless otherwise specifically defined.

[0062] In order to clearly describe the present application, components not related to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0063] Throughout this specification, when a device is said to be "connected" to another device, this includes not only "direct connection" but also "indirect connection" with other elements interposed therebetween. Furthermore, when a device is said to "include" a certain component, unless otherwise stated, this does not exclude the inclusion of other components but rather implies that the device may include other components.

[0064] When a device is said to be "on" another device, it may be directly on the other device, but there may also be other devices between it. In contrast, when a device is said to be "directly on" another device, there are no other devices between it.

[0065] Although the terms first, second, etc. are used in some instances herein to represent various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first interface and the second interface, etc. are represented. Furthermore, as used in this article, the singular forms "one," "an," and "the" are intended to also include the plural forms, unless there is a contrary indication in the context. It should be further understood that the terms "comprise," "include," and "include" indicate the presence of features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, types, 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." Exceptions to this definition only occur when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0066] The technical terms used herein are intended only to refer to specific embodiments and are not intended to limit this application. The singular form used herein also includes the plural form unless the statement explicitly indicates otherwise. The term "comprising" as used in this specification is intended to specify specific features, regions, integers, steps, operations, elements, and / or components and does not exclude the presence or addition of other features, regions, integers, steps, operations, elements, and / or components.

[0067] Although not defined differently, all terms used herein, including technical and scientific terms, have the same meanings as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are to be interpreted as having meanings consistent with the relevant technical literature and current teachings, and unless otherwise defined, they should not be overly interpreted as ideal or highly formalized meanings.

[0068] Figure 1 It is a cross-sectional view of the compressor of the present invention. Figure 2 It is a schematic diagram of the combination of the rear shell and the air guide cover in the compressor of the present invention. Figure 3 yes Figure 2 Cross-sectional view along the AA axis. Figure 4 yes Figure 2 Cross-sectional view along the BB direction. Figure 5 It is a three-dimensional diagram of the air guide cover in the compressor of the present invention from a first perspective. Figure 6 It is a stereoscopic view of the air guide cover in the compressor of the present invention from a second viewing angle. Figure 7 It is a schematic diagram of the rear shell of the compressor of the present invention. Figure 8 1 is a cross-sectional view of the rear shell of the compressor of the present invention. Figures 1 to 8 As shown, the compressor of the present invention includes a rear housing 4, a plurality of heat dissipation ribs 17, and a shroud 6. The first side of the rear housing 4 forms a space for accommodating the controller, a secondary bearing seat 41 is provided in the center of the second side, and the air intake 12 and the terminal blocks are respectively distributed on either side of the secondary bearing seat 41. A plurality of heat dissipation ribs 17 are respectively provided on either side of the secondary bearing seat 41. The shroud 6 covers the second side of the rear housing 4. The shroud 6, the second side of the rear housing 4, and the plurality of heat dissipation ribs 17 together form a plurality of refrigerant flow channels that guide the refrigerant from the air intake to the terminal blocks.

[0069] The compressor of the present invention enhances the cooling of the controller by adding heat dissipation ribs to the rear shell and adding a guide cover between the rear shell and the motor, thereby controlling the flow direction of the low-temperature, low-pressure refrigerant sucked in by the compressor, passing through the heat dissipation rib area of the rear shell, increasing the convection heat exchange area with the rear shell during the flow of the refrigerant, and finally guiding the low-temperature, low-pressure refrigerant to the space opposite to the air intake port, thereby completing the enhanced cooling of the rear shell and achieving the purpose of enhancing the cooling of the controller.

[0070] In a preferred embodiment, the air deflector 6 includes: an annular plate 66, an annular wall 65, an annular shoulder 62, and a radial gas flow limiting baffle 63. The annular wall 65 is arranged on the outer edge of the annular plate 66, protruding toward the side away from the rear shell 4, and an annular drainage channel is formed between the annular wall 65 and the inner wall of the rear shell 4. The annular shoulder 62 is arranged on the inner edge of the annular plate 66, protruding toward the side away from the rear shell 4. The radial gas flow limiting baffle 63 is arranged at the upper edge of the annular wall 65 and extends to the inner wall of the rear shell 4, sealing the air intake 12 in the annular drainage channel and guiding the refrigerant to flow into the annular drainage channel, but is not limited to this.

[0071] In a preferred embodiment, the air guide cover 6 also includes a plurality of circumferential gas flow limiting baffles 61, which protrude radially outward from the outer periphery of the annular wall 65. The circumferential gas flow limiting baffles 61 divide the annular drainage channel into a plurality of sub-channels, and the sub-channels are respectively connected to the corresponding refrigerant channels, but not limited to this.

[0072] In a preferred embodiment, the annular shoulder 62 presses the auxiliary bearing seat 41 and is in surface contact with the upper end surface and the outer side surface of the auxiliary bearing seat 41, but the present invention is not limited thereto.

[0073] In a preferred embodiment, the height of the annular drainage channel is greater than the height of the refrigerant flow channel, but the present invention is not limited thereto.

[0074] In a preferred embodiment, the width of the refrigerant flow channel is greater than the height of the refrigerant flow channel, but the present invention is not limited thereto.

[0075] In a preferred embodiment, the refrigerant flow channel covers the area on the second side of the rear shell 4 except the auxiliary bearing seat, one end of the refrigerant flow channel is connected to the air intake port, and the other end is connected to the terminal, but not limited to this.

[0076] In a preferred embodiment, the refrigerant flow channels are straight flow channels, and the refrigerant flow channels are parallel to each other, but not limited thereto.

[0077] In a preferred embodiment, the refrigerant flow channel is a plurality of concentric annular flow channels with different diameters centered on the auxiliary bearing seat, but the present invention is not limited thereto.

[0078] In a preferred embodiment, the annular shoulder 62 is provided with a plurality of first limiting pin holes 64, the auxiliary bearing seat 41 is provided with a plurality of second limiting pin holes 16, and the annular shoulder 62 and the auxiliary bearing seat 41 are pin-connected by limiting pins 15, but not limited thereto.

[0079] Continue to refer Figure 1 The compressor capable of enhancing controller cooling of the present invention includes a front housing 1, a stator plate 11, a rotor plate 2, a center housing 3, a crankshaft 10, a motor 9, a rear housing 4, a shroud 6, and a motor controller housing 8. The controller in the controller housing 8 is not shown in the figure.

[0080] Figure 2 、 3 4 is the rear shell 4 assembly and its cross-sectional view, and the rear shell 4 assembly consists of the rear shell 4, auxiliary bearing 7, limit pin and air guide 6. Among them, the auxiliary bearing 7 is not shown in the figure. When the compressor starts to run, the low-temperature, low-pressure refrigerant sucked in from the air intake 12 is restricted by the axial gas flow limiting baffle and the circumferential gas flow limiting baffle 61 of the air guide 6 in the axial and circumferential directions respectively. The refrigerant flow direction changes from being tangentially along the shell at the air intake 12 to being close to the bottom side of the shell and perpendicular to the shell axis. As the compressor runs, a steady stream of low-temperature, low-pressure refrigerant flows through the bottom side of the rear shell 4 and its heat dissipation ribs 17, and continuously conducts the heat from the controller chamber to the rear shell 4 by means of convection heat exchange, thereby cooling the controller and its chamber. The refrigerant gas that completes the heat exchange will flow out from the position opposite to the air intake 12 and then enter the compression chamber.

[0081] Figure 5 、 6The air deflector 6 of this patent is a plastic part with two limit pin holes for circumferential installation and positioning. In the axial direction, one end is limited by contact with the axial gas flow limiter baffle through the bolts on the stator, and the other end is limited by contact between the end face of the air deflector 6 and the end face of the heat dissipation rib 17. After installation, the axial gas flow limiter baffle of the air deflector 6 is slightly higher than the air intake 12 of the rear shell 4. Under the joint restriction of the circumferential gas flow limiter plate and the axial gas flow limiter plate of the air deflector 6, most of the low-temperature, low-pressure refrigerant inhaled by the compressor flows along the heat dissipation rib 17 through the bottom side of the rear shell 4 until it flows out on the opposite side of the air intake 12. This structure increases the passage distance and contact area of the inhaled refrigerant in the air flow channel, and through sufficient heat exchange, it removes the heat conducted from the controller chamber to the rear shell 4 to the greatest extent. The air deflector 6 includes: an annular plate 66, an annular wall 65, an annular shoulder 62, a radial gas flow limiter baffle 63, and a plurality of circumferential gas flow limiter baffles 61. An annular wall 65 is provided on the outer edge of annular plate 66, protruding toward the side facing away from rear housing 4. An annular drainage channel is formed between annular wall 65 and the inner wall of rear housing 4. An annular shoulder 62 is provided on the inner edge of annular plate 66, protruding toward the side facing away from rear housing 4. A radial gas flow restrictor 63 is provided at the upper edge of annular wall 65, extending to the inner wall of rear housing 4. It seals the air intake 12 within the annular drainage channel and guides the refrigerant into the annular drainage channel. A circumferential gas flow restrictor 61 protrudes radially outward from the outer periphery of annular wall 65. This circumferential gas flow restrictor 61 divides the annular drainage channel into several sub-channels, each of which connects to a corresponding refrigerant flow channel. Heat dissipation ribs 17 are integrally formed on the second side of rear housing 4. In this embodiment, the heat dissipation ribs 17 function as heat sinks to expand the heat dissipation area, divert the flow in the annular drainage channel, reduce noise, and enhance heat exchange with the refrigerant flow channel. The deflector 6 allows the refrigerant entering from the air intake 12 to be diverted by the annular drainage channel and guided into the corresponding refrigerant flow channels separated by the heat dissipation ribs 17. By utilizing the characteristics of the flat channel of the refrigerant flow channel, the refrigerant is in more complete contact with the surface of the second side of the rear shell 4, thereby enhancing the heat exchange effect.

[0082] Figure 7 、 8 The rear housing 4 of this patent is an aluminum alloy casting with two pin holes on the end face of the bearing seat for circumferential installation and positioning of the air guide cover 6. Four heat dissipation ribs 17 are added to the bottom to increase the heat dissipation area and improve the heat dissipation efficiency. Figure 7The refrigerant shown in FIG2 is limited by refrigerant flow channels L1 and L2, which can respectively bypass the auxiliary bearing mounting area 14 and reach the terminal mounting area 13, which is separated from the air intake 12. Flow channels L1 and L2 completely cover the area on the second side of the rear housing 4 except for the auxiliary bearing seat, greatly enhancing the heat exchange capacity of the rear housing 4. The present invention provides a method for cooling the controller and its chamber without affecting the overall weight of the compressor. The method is easy to manufacture and install, and can enhance controller cooling and improve compressor reliability.

[0083] In summary, the compressor of the present invention can control the flow direction of the refrigerant sucked into the compressor by adding a guide structure, so that the low-temperature, low-pressure refrigerant flows through the heat dissipation rib area of the rear shell, realizing convection heat exchange between the low-temperature refrigerant and the high-temperature rear shell, indirectly playing a role in dissipating heat for the controller, and improving the reliability of the controller under harsh working conditions.

[0084] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A compressor, characterized in that: include: A rear shell (4), wherein a first side of the rear shell (4) forms a space for accommodating the controller, a secondary bearing seat (41) is provided at the center of the second side, and an air intake port (12) and a terminal are respectively distributed on both sides of the secondary bearing seat (41) as the center; A plurality of heat dissipation ribs (17) are respectively arranged on both sides of the auxiliary bearing seat (41); and A deflector (6) covers the second side of the rear shell (4), the deflector (6), the second side of the rear shell (4) and the plurality of heat dissipation ribs (17) together form a plurality of refrigerant flow channels for guiding the refrigerant from the air inlet to the terminal, the deflector (6) comprising: an annular plate (66); an annular wall (65) provided on the outer edge of the annular plate (66), protruding toward the side away from the rear shell (4), an annular drainage channel formed between the annular wall (65) and the inner wall of the rear shell (4); an annular shoulder (66); 2), which is arranged on the inner edge of the annular plate (66) and protrudes toward the side away from the rear shell (4); a radial gas flow limiting baffle (63), which is arranged on the upper edge of the annular wall (65) and extends to the inner wall of the rear shell (4), seals the air intake (12) in the annular drainage channel and guides the refrigerant to flow into the annular drainage channel, and the refrigerant flow channel covers the area on the second side of the rear shell (4) except for the auxiliary bearing seat, and one end of the refrigerant flow channel is connected to the air intake, and the other end is connected to the terminal.

2. The compressor according to claim 1, wherein The deflector (6) further includes a plurality of circumferential gas flow limiting baffles (61) protruding radially outward from the outer periphery of the annular wall (65), and the circumferential gas flow limiting baffles (61) divide the annular diversion channel into a plurality of sub-channels, and the sub-channels are respectively connected to the corresponding refrigerant flow channels.

3. The compressor according to claim 1, wherein The annular shoulder (62) presses the auxiliary bearing seat (41) and contacts the upper end surface and outer side surface of the auxiliary bearing seat (41).

4. The compressor according to claim 1, wherein The height of the annular drainage channel is greater than the height of the refrigerant flow channel.

5. The compressor according to claim 4, wherein The width of the refrigerant flow channel is greater than the height of the refrigerant flow channel.

6. The compressor according to claim 3, wherein The refrigerant flow channels are straight flow channels, and the refrigerant flow channels are parallel to each other.

7. The compressor according to claim 3, wherein The refrigerant flow channel is a plurality of concentric annular flow channels with different diameters centered on the auxiliary bearing seat.

8. The compressor according to claim 3, wherein The annular shoulder (62) is provided with a plurality of first limiting pin holes (64), the auxiliary bearing seat (41) is provided with a plurality of second limiting pin holes (16), and the annular shoulder (62) and the auxiliary bearing seat (41) are pin-connected via limiting pins (15).

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