Horizontal scroll compressor

Abstract

The invention provides a horizontal scroll compressor which comprises a static scroll plate and a front shell structure arranged on one side of the static scroll plate, and the front shell structure comprises a front shell, an oil separation device and a sealing ring body; the front shell comprises a flange and a cover body connected with the flange, the flange is connected with the static vortex plate, the cover body and the static vortex plate form a containing space, and the cover body is provided with a first exhaust port; the sealing ring body is arranged in the containing space and divides the containing space into a first air cavity and an annular second air cavity on the periphery of the first air cavity, the first air cavity is communicated with a second exhaust port of the static vortex plate, and the second air cavity is communicated with the first exhaust port; the oil separation device is provided with an oil separation inlet, an oil separation outlet and an oil return hole, the oil separation inlet is communicated with the first air cavity, the oil separation outlet and the oil return hole are respectively arranged above and below an axial plane passing through the horizontal scroll compressor, and the oil separation outlet and the oil return hole are both communicated with the second air cavity. The horizontal scroll compressor disclosed by the invention has higher oil return efficiency and NVH (Noise Vibration and Harshness) performance.

Description

Technical Field

[0001] The present invention relates to the technical field related to refrigeration equipment, and in particular to a horizontal scroll compressor. Background Art

[0002] With the rapid development of the new energy vehicle market, electric scroll compressors, as core components of thermal management systems, have a direct impact on the comfort, range, and user experience of the vehicle due to their noise, vibration, harshness (NVH) and energy efficiency. Therefore, how to improve the energy efficiency of scroll compressors while achieving low noise is an urgent issue that needs to be addressed.

[0003] Patent CN114320897A discloses a scroll compressor, in which the oil-gas mixture discharged from the stator exhaust port enters the oil separation chamber through the oil separation inlet, and after oil separation through the oil separation tube, most of the refrigerant is discharged through the exhaust port, and the lubricating oil and a small amount of refrigerant enter the containing tank through the oil discharge hole. The oil outlet hits the air baffle to achieve secondary oil separation, and the remaining refrigerant is discharged from the exhaust port after passing through the exhaust hole. The lubricating oil returns to the interior of the compressor through the oil return hole at the bottom. This solution improves the oil separation effect through two oil separations, so that the internal moving parts are better lubricated and cooled, thereby reducing the friction power consumption of the moving parts, thereby improving the compressor performance and reducing the NVH of the compressor. However, the gas after the secondary oil separation in this solution is exhausted through a small hole. When the compressor runs at a high speed, there is a risk of exhaust whistling, and there is a risk that the strength of the compressor casing may deteriorate.

[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 prior art known to those skilled in the art. Summary of the Invention

[0005] In view of the problems in the prior art, an object of the present invention is to provide a horizontal scroll compressor having higher oil return efficiency and NVH performance.

[0006] Specifically, the present invention provides a horizontal scroll compressor, comprising a stationary scroll and a front shell structure provided on one side of the stationary scroll, wherein the front shell structure comprises a front shell, an oil separator and a sealing ring;

[0007] The front shell includes a flange and a cover connected to the flange, the flange is connected to the static scroll, the cover and the side of the static scroll form an accommodating space, and the cover is provided with a first exhaust port;

[0008] The sealing ring is disposed in the accommodating space and divides the accommodating space into a first air cavity and a second air cavity annularly arranged outside the first air cavity, wherein the first air cavity is communicated with the second exhaust port of the fixed scroll, and the second air cavity is communicated with the first exhaust port;

[0009] The oil separator device is provided with an oil separator inlet, an oil separator outlet and an oil return hole. The oil separator inlet is communicated with the first air cavity. The oil separator outlet and the oil return hole are respectively arranged above and below the axial plane passing through the horizontal scroll compressor, and the oil separator outlet and the oil return hole are both communicated with the second air cavity.

[0010] According to some examples of the present invention, the inner wall of the flange and the sealing ring body are both circular, and the center of the sealing ring body is arranged below the center of the inner wall of the flange.

[0011] According to some examples of the present invention, the second air cavity is provided with two air baffles;

[0012] The two air baffles separate the second air cavity into an exhaust cavity provided with the oil outlet and the first exhaust port and an oil pool cavity provided with an oil return hole, and the exhaust cavity is communicated with the oil pool cavity.

[0013] According to some examples of the present invention, the angle β between the radial direction of the air baffle and the flange satisfies: the angle β≤5°.

[0014] According to some examples of the present invention, a height difference H between an end surface of the air baffle facing the static scroll and an end surface of the sealing ring body facing the static scroll satisfies: 0<H≤1mm.

[0015] According to some examples of the present invention, the front shell structure of the oil pool cavity further includes a plurality of reinforcing ribs, and the plurality of reinforcing ribs are arranged in the oil pool cavity.

[0016] In the radial direction of the sealing ring body, the distance between the oil return hole and the sealing ring body is greater than or equal to 1 mm.

[0017] In the radial direction of the inner wall of the flange, a distance between the oil return hole and the inner wall of the flange is greater than or equal to 1 mm.

[0018] The front shell structure of the horizontal scroll compressor of the present invention realizes three-time oil separation of the refrigerant at the exhaust port of the static scroll by arranging a sealing ring body, thereby improving the oil return efficiency and better absorbing the exhaust sound waves, reducing the noise of the compressor, and improving the NVH performance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings herein are incorporated into and constitute a part of the specification, illustrating 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 those of ordinary skill in the art, other drawings can 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.

[0020] Figure 1 This is a schematic structural diagram of a front shell structure according to an embodiment of the present invention;

[0021] Figure 2 A schematic plan view of a front shell structure according to an embodiment of the present invention;

[0022] Figure 3 for Figure 2 Cross-sectional view at RR. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied in various other specific embodiments, and the various details of the present invention may be modified or altered based on different viewpoints and application systems without departing from the spirit of the present invention. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other unless they conflict.

[0024] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. The present invention can be embodied in many different forms and is not limited to the embodiments described herein.

[0025] In the description of the present invention, 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 that embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and integrate different embodiments or examples described in the present invention, as well as features of different embodiments or examples, unless otherwise inconsistent.

[0026] In order to clearly describe the present invention, components not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] The technical terms used herein are intended only to refer to specific embodiments and are not intended to limit the present invention. The singular as used herein also includes the plural unless expressly stated to the contrary. The term "comprising" as used in this specification specifies 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.

[0031] 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 invention belongs. Terms defined in commonly used dictionaries are to be interpreted as having meanings consistent with the relevant technical literature and current knowledge, and unless otherwise defined, they should not be overly interpreted as ideal or highly formalized meanings.

[0032] The structure of the horizontal scroll compressor of the present invention is further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments are not intended to limit the scope of protection of the present invention.

[0033] The present invention provides a horizontal scroll compressor, which includes a fixed scroll (not shown in the figure) and a front shell structure arranged on a side of the fixed scroll away from the movable scroll. Figures 1 to 3 They are respectively a structural schematic diagram, a plan schematic diagram and a cross-sectional diagram of the front shell structure of an embodiment. Specifically, the front shell structure includes a front shell, an oil separation device 2 and a sealing ring body 3; the front shell includes a flange 11 and a cover body 12 connected to the flange 11, the cover body 12 is provided with a first exhaust port 121, the flange 11 is connected to the static scroll, and in one embodiment, the flange 11 can be connected to the static scroll by a plurality of bolts passing through a plurality of bolt holes provided on the flange 11. At this time, the cover body 12 and the side end face of the static scroll form an accommodating space. Usually, the first exhaust port 121 of the cover body 12 is provided above the axial plane passing through the horizontal scroll compressor. The "axial plane" here is a plane parallel to the ground plane and containing the axis of the compressor.

[0034] The sealing ring body 3 is disposed within the accommodating space and divides the accommodating space into a first air cavity A and a second annular air cavity on the periphery of the first air cavity A. The first air cavity A and the second air cavity are not connected here. The end face of the sealing ring body 3 facing the static scroll can be designed to be flush with the end face of the flange 11 facing the static scroll, so that a sealed connection between the end face of the sealing ring body 3 facing the static scroll and the static scroll, and between the end face of the flange 11 facing the static scroll and the static scroll can be achieved. The first air cavity A is connected to the second exhaust port (not shown in the figure) of the static scroll, that is, the first air cavity A completely covers the exhaust port of the static scroll. The second air cavity is connected to the first exhaust port 121.

[0035] The oil separator device 2 is provided with an oil separator inlet 21, an oil separator outlet 22 and an oil return hole 23. The oil separator inlet 21 is communicated with the first air cavity A, the oil separator outlet 22 is arranged opposite to the first exhaust port 121 of the cover body 12, and the oil return hole 23 is connected to the oil return channel of the horizontal scroll compressor. Accordingly, the oil separator outlet 22 and the oil return hole 23 are respectively arranged above and below the axial plane passing through the horizontal scroll compressor, and the oil separator outlet 22 and the oil return hole 23 are both communicated with the second air cavity.

[0036] The structure of the sealing ring body 3 determines the structure of the first air cavity A and the structure of the second air cavity. The sealing ring body 3 can be circular, quadrilateral, or polygonal. For ease of description, the following uses a circular sealing ring body 3 as an example. The inner wall of the flange and the sealing ring body are both circular, and the center of the sealing ring body is set below the center of the inner wall of the flange.

[0037] In one embodiment, the center of the sealing ring body 3 is positioned below the center of the inner wall of the flange 11, i.e., the first air cavity A is eccentrically arranged relative to the inner wall of the flange. The second air cavity is provided with two air baffles 13, the ends of which are connected to the inner wall of the flange 11 and the outer periphery of the sealing ring body 3, respectively. The two air baffles 13 are positioned on either side of the oil separator outlet 22 / first exhaust port 121, respectively. In other words, the two air baffles 13 separate the second air cavity into an upper exhaust cavity B1, which is provided with the oil separator outlet 22 and the first exhaust port 121, and a lower oil sump cavity B2, which is provided with the oil return hole 23. The exhaust cavity B1 communicates with the oil sump cavity B2. Preferably, the angle β between the air baffle 13 and the radial direction of the flange 11 satisfies the following condition: angle β ≤ 5°.

[0038] The bottom of the oil sump cavity B2 is typically an oil sump. Preferably, the volume of the oil sump cavity is greater than 30ml, and the height of the oil sump is determined by the operating status of the compressor. The lubricating oil in the exhaust cavity B1 of the front shell structure and the annular oil sump cavity B2 can absorb some of the sound waves propagating outward from the interior of the first air cavity, thereby improving the NVH performance of the compressor. At the same time, the downward offset design of the first air cavity A can reduce the space below the oil sump cavity B2, thereby reducing the volume of the oil sump below the oil return hole 23 while ensuring the oil sump volume. The lubricating oil returning after oil separation can quickly cover the oil return hole 23, improving the oil return effect and preventing hot gas bypass.

[0039] Furthermore, in the radial direction of the sealing ring body, the distance between the oil return hole 23 and the sealing ring body 3 is greater than or equal to 1 mm, and in the radial direction of the inner wall of the flange, the distance between the oil return hole 23 and the inner wall of the flange 11 is greater than or equal to 1 mm, that is, the oil return hole must meet the requirements and the distance from the outer periphery of the sealing ring body 3 and the distance between it and the inner wall of the flange 11 are both greater than or equal to 1 mm.

[0040] The exhaust chamber B1 and the oil pool chamber B2 can be connected by setting a height difference H between the end face of the air baffle 13 facing the static vortex and the end face of the sealing ring body 3 facing the static vortex. Since the end face of the sealing ring body 3 facing the static vortex is flush with the end face of the flange 11 on this side, the height difference between the end face of the flange 11 on this side and the end face of the air baffle 13 on this side is also H. Figure 3 .

[0041] The front housing structure of the present invention separates the oil separation outlet 22 of the oil separator 2 from the first exhaust port 121, with an exhaust chamber B1 in between. After separation (primary oil separation) through the oil separation passages of the oil separator 2, the refrigerant containing a small amount of lubricating oil can expand and undergo secondary oil separation within the exhaust chamber B1. The lubricating oil after secondary oil separation can flow back into the bottom oil pool of the oil sump chamber B2 through the gap formed by the height difference H between the end face of the sealing ring 3 / flange 11 and the end face of the air baffle 13. The lubricating oil separated by the oil separation passages of the oil separator 2 flows through the oil return hole 23 into the bottom oil pool of the oil sump chamber B2. A small amount of gas remains in this lubricating oil. When this gas enters the second exhaust chamber through the height difference H between the end face of the flange 11 and the end face of the air baffle 13 and is discharged, the lubricating oil in the gas is blocked by the air baffle 13 and remains in the oil sump chamber B2, achieving a third oil separation. Preferably, 0<H≤1mm, such as the height difference H is 0.5mm. The height difference H allows the lubricating oil after secondary oil separation to flow back to the bottom oil pool of the oil pool cavity B2 while preventing the gas in the exhaust cavity B1 from entering the oil pool of the oil pool cavity, thereby stirring the oil pool and carrying away the lubricating oil.

[0042] In addition, in order to increase the mechanical strength of the front shell structure, the front shell structure can also include multiple reinforcing ribs 14. The multiple reinforcing ribs 14 are arranged in the oil pool cavity, and their two ends can be connected to the inner wall of the flange 11 and the outer periphery of the sealing ring body 3 respectively.

[0043] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0044] 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 horizontal scroll compressor, characterized in that: It includes a static scroll and a front shell structure arranged on one side of the static scroll, wherein the front shell structure includes a front shell, an oil separator and a sealing ring; The front shell includes a flange and a cover connected to the flange, the flange is connected to the static scroll, the cover and the static scroll form an accommodating space, and the cover is provided with a first exhaust port; The sealing ring is disposed in the accommodating space and divides the accommodating space into a first air cavity and a second air cavity annularly arranged outside the first air cavity, wherein the first air cavity is communicated with the second exhaust port of the fixed scroll, and the second air cavity is communicated with the first exhaust port; The oil separator device is provided with an oil separator inlet, an oil separator outlet and an oil return hole. The oil separator inlet is communicated with the first air cavity. The oil separator outlet and the oil return hole are respectively arranged above and below the axial plane passing through the horizontal scroll compressor, and the oil separator outlet and the oil return hole are both communicated with the second air cavity.

2. The horizontal scroll compressor according to claim 1, characterized in that: The inner wall of the flange and the sealing ring body are both circular, and the center of the sealing ring body is arranged below the center of the inner wall of the flange.

3. The horizontal scroll compressor according to claim 1, characterized in that: The second air cavity is provided with two air baffles; The two air baffles separate the second air cavity into an exhaust cavity provided with the oil outlet and the first exhaust port and an oil pool cavity provided with an oil return hole, and the exhaust cavity is communicated with the oil pool cavity.

4. The horizontal scroll compressor according to claim 3, characterized in that: The included angle β between the air baffle and the radial direction of the flange satisfies: the included angle β≤5°.

5. The horizontal scroll compressor according to claim 3, characterized in that: A height difference H between an end surface of the air baffle facing the static scroll and an end surface of the sealing ring body facing the static scroll satisfies the following: 0<H≤1mm.

6. The horizontal scroll compressor according to claim 3, characterized in that: The volume of the oil pool cavity is greater than 30 ml.

7. The horizontal scroll compressor according to claim 3, characterized in that: The front shell structure further includes a plurality of reinforcing ribs, and the plurality of reinforcing ribs are arranged in the oil pool cavity.

8. The horizontal scroll compressor according to claim 1, characterized in that: In the radial direction of the sealing ring body, the distance between the oil return hole and the sealing ring body is greater than or equal to 1 mm.

9. The horizontal scroll compressor according to claim 1, characterized in that: In the radial direction of the inner wall of the flange, a distance between the oil return hole and the inner wall of the flange is greater than or equal to 1 mm.

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