Oil stabilizing cover and compressor comprising same

Abstract

The utility model provides an oil stabilizing cover and a compressor comprising the same, the oil stabilizing cover is arranged between a motor and a pump body assembly of the compressor, and the oil stabilizing cover comprises an upper part and a lower part; the upper part comprises an annular first connecting part and a first guide part connected with the first connecting part, and the radial size, facing the lower part, of the first guide part is smaller than that of the first connecting part; the lower part comprises a second connecting part provided with a first through hole and a second guide part connected with the second connecting part, and the outer periphery of the second guide part is obliquely arranged relative to the inner periphery of the second guide part to the pump body assembly; and the first guide part is matched with the second guide part, and a first gap is formed between the first guide part and the second guide part. The oil stabilizing cover can keep the oil level of the lower portion of the compressor stable, the oil level height of the compressor during operation is increased, the oil discharge rate of the compressor is reduced, and therefore the overall stability and efficiency of the compressor are improved, and the service life of the compressor is prolonged.

Description

Oil stabilizing cover and compressor including it Technical Field

[0001] This utility model relates to the field of compressor technology, and more specifically, to an oil stabilizing cover and a compressor including the same. Background Technology

[0002] Low oil level is a significant cause of system lubrication failure during compressor operation. The main reasons for low oil level during compressor operation include: high-speed rotation of the motor rotor and periodic exhaust from the muffler, which disrupt the oil level due to the high-speed flow of refrigerant, forming oil mist that enters the upper cylinder head cavity through the refrigerant channel. Furthermore, the lubricating oil entering the upper part of the motor may not return smoothly, or it may be carried away by the refrigerant as it flows back to the lower part of the motor, failing to return to the oil sump in time through the upper cylinder head channel. This inability of lubricating oil to return promptly to the lower oil sump causes the oil level to continuously decrease. When the remaining lubricating oil is insufficient to meet the lubrication requirements of the compressor components, the reliability of the compressor will be affected.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this utility model, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] To address the problems in the prior art, the purpose of this utility model is to provide an oil stabilizing cover and a compressor including the oil stabilizing cover. The oil stabilizing cover can maintain a stable oil level at the bottom of the compressor, increase the oil level height during compressor operation, reduce the oil discharge rate of the compressor, thereby improving the overall stability and efficiency of the compressor and extending the compressor's lifespan.

[0005] The first aspect of this utility model provides an oil stabilizing cover, which is disposed between the motor and pump body assembly of a compressor, and includes an upper part and a lower part;

[0006] The upper part includes an annular first connecting part and a first guide part connected to the first connecting part, wherein the radial dimension of the first guide part toward the lower part is smaller than the radial dimension of the first connecting part;

[0007] The lower part includes a second connecting part having a first through hole and a second guide part connected to the second connecting part, wherein the outer periphery of the second guide part is inclined toward the pump body assembly relative to its inner periphery.

[0008] The first guide portion and the second guide portion cooperate with each other and a first gap is provided between them.

[0009] According to a first aspect of the present invention, the width of the first gap is greater than or equal to 1 mm.

[0010] According to a first aspect of the present invention, the included angle between the first connecting portion and the axis of the compressor is β, satisfying: 45° < β ≤ 180°; and / or

[0011] The angle between the second guide and the plane perpendicular to the axis of the compressor is θ, which satisfies: 0° < θ ≤ 90°.

[0012] According to a first aspect of the present invention, the radial dimension of the first guide portion toward the lower portion is less than or equal to the radial dimension of the outer periphery of the second guide portion.

[0013] According to a first aspect of the present invention, the upper part and the lower part are separate components;

[0014] The first gap is a continuous annular gap.

[0015] According to a first aspect of the present invention, the upper part and the lower part are an integral piece;

[0016] The first gap is a discontinuous, annularly distributed gap.

[0017] According to a first aspect of the present invention, the oil stabilizing cover further includes a plurality of support columns, which extend along the outer periphery of the first connecting portion to the outer periphery of the first guide portion and the second guide portion.

[0018] According to a first aspect of the present invention, the second connecting portion is further provided with a second through hole connected to the first through hole.

[0019] According to a first aspect of the present invention, the oil stabilizing cover further includes a blocking ring connected to the outer periphery of the first connecting portion.

[0020] The second aspect of this utility model provides a compressor, including a housing, a pump assembly housed in the housing, a motor housed in the housing, and the oil stabilizer described in the first aspect.

[0021] According to a second aspect of the present invention, the pump body assembly includes an upper cylinder head and an upper muffler, wherein the upper cylinder head has a plurality of channel holes on its outer periphery;

[0022] The second connecting part is connected to the muffler;

[0023] The projections of the first guide portion and the second guide portion onto a plane perpendicular to the compressor axis completely cover the projections of the multiple channel holes of the upper cylinder head onto a plane perpendicular to the compressor axis.

[0024] According to a second aspect of the present invention, the first connecting portion is connected to the inner wall of the housing.

[0025] According to a second aspect of the present invention, the oil stabilizing cover further includes a plurality of support columns, which extend along the outer periphery of the first connecting portion to the outer periphery of the first guide portion and the second guide portion;

[0026] One end of each of the support columns near the second guide is connected to the upper cylinder head.

[0027] According to a second aspect of the present invention, a second gap is provided between the first connecting part and the inner wall of the housing, and the width of the second gap is less than or equal to the gap between the lower bracket of the motor and the housing.

[0028] According to a second aspect of the present invention, the second connecting portion is further provided with a second through hole connected to the first through hole;

[0029] The second through hole is located above the exhaust port of the upper muffler.

[0030] According to a second aspect of the present invention, the projection distance between the outer periphery of the second guide portion and the upper end surface of the upper cylinder head on the axis of the compressor is greater than or equal to 1 mm.

[0031] The oil stabilizer of this invention includes an upper part and a lower part, which, when fitted together, can cover the channel hole of the upper cylinder head, thereby preventing the oil surface from being damaged by high-speed flowing refrigerant, etc., and avoiding the formation of oil mist by lubricating oil and entering the upper cavity of the motor along with the refrigerant through the channel hole of the upper cylinder head. At the same time, the gap between the upper and lower parts of the oil stabilizer and the gap between the oil stabilizer and the housing can help the lubricating oil flowing back from the stator shear edge fall back to the lower oil sump, maintain the stability of the lower oil level of the compressor, increase the oil level height during compressor operation, reduce the compressor oil discharge rate, improve the overall stability and efficiency of the compressor, and extend the compressor life. Attached Figure Description

[0032] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0033] Figure 1 is a partial structural schematic diagram of the oil stabilizer cover of the first embodiment of this utility model when used in a compressor;

[0034] Figures 2 and 3 are respectively a schematic diagram and a side view of the upper part of the oil stabilizing cover of the first embodiment of this utility model;

[0035] Figures 4 and 5 are respectively a schematic diagram and a side view of the lower part of the oil stabilizing cover of the first embodiment of this utility model;

[0036] Figures 6 to 8 are schematic diagrams of the oil stabilizing cover of the second embodiment of this utility model, side views, and partial structural schematic diagrams of its use in a compressor, respectively.

[0037] Figures 9 and 10 are schematic diagrams of the oil stabilizing cover of the third embodiment of this utility model and partial structural diagrams of its use in a compressor, respectively.

[0038] Figures 11 and 12 are schematic diagrams of the oil stabilizing cover of the fourth embodiment of this utility model and partial structural diagrams of its use in a compressor, respectively.

[0039] Figure 13 is a schematic diagram of the structure of the oil stabilizing cover according to the fifth embodiment of this utility model;

[0040] Figure 14 is a schematic diagram of the oil stabilizing cover of the sixth embodiment of this utility model. Detailed Implementation

[0041] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0042] In the description of this utility model, it should be understood that 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 indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and settings are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0045] The structure of the oil stabilizer cover and the compressor including it of this utility model 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 this utility model.

[0046] Figure 1 is a partial structural diagram of the oil stabilizer cover of the first embodiment of the present invention when used in a compressor. The oil stabilizer cover is disposed between the motor 1 and the pump body assembly of the compressor. The oil stabilizer cover includes an upper part 21a and a lower part 22a.

[0047] Figures 2 and 3 are a schematic diagram and a side view of the upper part of the oil stabilizing cover according to the first embodiment, respectively. The upper part 21a includes an annular first connecting part 211a and a first guide part 212a connected to the first connecting part 211a. The radial dimension of the first guide part 212a toward the lower part 21b is smaller than the radial dimension of the first connecting part 211a. When the first connecting part 211a is annular and the first guide part 212a is also circular, the outer diameter of the upper part 21a of the oil stabilizing cover is defined as d1, and the diameter of the first guide part 212a toward the lower part 21b is defined as d2. That is, the diameter d2 of the first guide part 212a toward the lower part 21b is smaller than the diameter d1 of the first connecting part 211a.

[0048] Figures 4 and 5 are a schematic diagram and a side view of the lower part of the oil stabilizing cover according to the first embodiment, respectively. The lower part 22a includes a second connecting part 221a with a first through hole 2211a and a second guide part 222a connected to the second connecting part 221a. The second connecting part 221a can be an annular plane for fitting against the upper surface of the muffler for easy installation. The outer periphery of the second guide part 222a is inclined towards the pump body assembly (upper cylinder head 4) relative to its inner periphery. Since the space between the muffler and the motor is small, to reduce the space occupied by the oil stabilizing cover, the angle θ between the second guide part 222a and the plane perpendicular to the compressor axis is preferably 0° < θ ≤ 90°.

[0049] In this invention, the first guide portion 212a and the second guide portion 222a cooperate with each other, and a first gap Ca is provided between them. The first gap Ca can prevent the backflowing lubricating oil from accumulating between the upper part 21a and the lower part 22a of the oil stabilizer, while allowing the lubricating oil to smoothly enter the lower housing space of the compressor.

[0050] This utility model also provides a compressor, including a housing 5, a pump assembly housed in the housing 5, and the aforementioned oil stabilizer. The compressor can be a single-cylinder compressor or a multi-cylinder compressor. The pump assembly of the single-cylinder compressor includes components such as a cylinder, an upper cylinder head 4, an upper muffler 3, a lower cylinder head, and a lower muffler (not shown in the figure), all housed within the compressor housing 5. Of course, the compressor also includes components such as a motor 1, but since this utility model does not involve these components, they will not be described in detail here. Multiple channel holes are provided on the outer periphery of the upper cylinder head 4 for lubricating oil to flow back to the oil sump. The function of the oil stabilizer in this utility model is to prevent the oil surface from being damaged by high-speed flowing refrigerant, etc., and to prevent the lubricating oil from forming oil mist and entering the upper cavity of the motor along with the refrigerant through the channel holes in the upper cylinder head. Therefore, the projection of the second guide portion 222a of the oil stabilizer on a plane perpendicular to the compressor axis completely covers the projection of the multiple flow holes of the upper cylinder head on a plane perpendicular to the compressor axis.

[0051] In the first embodiment, the cylindrical surface of the annular first connecting part 211a can fit against the inner wall of the housing 5 to fix the upper part 21a of the oil stabilizer. The conical surface of the inclined first guide part 212a can guide the lubricating oil flowing back from the stator tangent through the first gap and the upper cylinder head flow hole to flow back to the lower housing. Preferably, the projection distance h2 between the outer periphery of the second guide part 222a and the upper surface of the upper cylinder head 4 on the compressor axis is greater than or equal to 1 mm. In the first embodiment, the upper part 21a and the lower part 22a are separate parts. In this case, the first gap Ca between the upper and lower parts is a continuous annular gap. In order to better guide the lubricating oil flowing back from the stator tangent to fall back to the oil sump in the lower part of the compressor to maintain the stability of the oil level in the lower part of the compressor, preferably, the width of the first gap Ca (the vertical distance from the first guide part 212a to the second guide part 222a) h1 is greater than or equal to 1 mm. It should be noted that the outer periphery of the second guide section 222a is inclined toward the pump body assembly (upper cylinder head 4) relative to its inner periphery, which serves to better guide the lubricating oil flowing back from the stator tangent to continue flowing back to the lower housing.

[0052] Furthermore, in the first embodiment, the radial dimension (diameter d2) of the first guide portion 212a facing the lower portion 22a of the oil stabilizer is less than or equal to the radial dimension (diameter d3) of the outer periphery of the second guide portion 222a. This arrangement can prevent the lubricating oil in the lower part of the compressor housing from being carried into the upper part of the motor by the refrigerant.

[0053] Figures 6 to 8 are schematic diagrams, side views, and partial structural diagrams of the oil stabilizer cover according to the second embodiment of this utility model. Unlike the first embodiment, the upper and lower parts 22b of the oil stabilizer cover in the second embodiment are integral pieces, and the first connecting part 211b of the upper part is connected to the first guide part 212b in the form of a folded edge. That is, the angle between the first connecting part 211b and the axis of the compressor is β, satisfying: 45° < β ≤ 180°. The distance h4 from the top surface of the upper part of the oil stabilizer cover to the upper surface of the upper cylinder head 4 is less than the distance between the lower surface of the lower motor bracket and the upper surface of the upper cylinder head.

[0054] In the second embodiment, the first gap Cb is a discontinuous gap, each of which is elongated. Multiple first gaps Cb can be evenly distributed around the circumference of the oil stabilizer and form a ring. The discontinuous annular distribution of gaps can also guide the lubricating oil flowing back from the stator edge to the oil sump in the lower part of the compressor to maintain the stability of the oil level in the lower part of the compressor. At the same time, when the upper and lower parts of the oil stabilizer are integrated, they can be connected to the muffler 3 through the lower part 22b of the oil stabilizer. In this case, a second gap h3 can be set between the first connecting part 211b of the oil stabilizer and the inner wall of the housing, that is, the outer diameter d1 of the upper part (first connecting part 211b) is smaller than the inner wall diameter D1 of the housing 5. The width of the second gap h3 can be less than or equal to the gap between the lower support of the motor and the housing. At this time, the lubricating oil enters the annular channel between the upper part (first connecting part 211b) of the oil stabilizer and the housing 5 along with the refrigerant, and the gaseous refrigerant enters the upper cavity of the motor through the gap between the upper and lower parts 22b of the oil stabilizer. Meanwhile, the liquid lubricating oil falls back into the oil sump at the bottom of the compressor housing through the gap between the lower part 22b of the oil stabilizing cover and the upper cylinder head 4.

[0055] Furthermore, in the second embodiment, the first connecting portion 211b protrudes from the first guiding portion 212b. When the lubricating oil flows back from the stator edge through the gap between the oil stabilizer and the housing 5, it can prevent the refrigerant carrying the lubricating oil from flowing back through the gap again. The projection width of the first connecting portion 211b on the plane perpendicular to the axis of the compressor is defined as h5. Preferably, h5 > 2mm.

[0056] Figures 9 and 10 are schematic diagrams of the oil stabilizer cover of the third embodiment of this utility model and its partial structure when used in a compressor. Multiple connecting posts 2111c are evenly arranged on the outer periphery of the first connecting portion of the upper part 21c of the oil stabilizer cover. When the oil stabilizer cover of the third embodiment is applied to a compressor, the multiple connecting posts 2111c are welded to the inner wall of the housing 5 to achieve connection with the inner wall of the housing 5. The outer diameter d1 of the upper part 21c is smaller than the inner wall diameter D1 of the housing 5, meaning there is a second gap between the upper part 21c of the oil stabilizer cover and the inner wall of the housing 5. The width of the second gap can be less than or equal to the gap between the lower support of the motor and the housing. At this time, lubricating oil enters the annular channel between the upper part 21c of the oil stabilizer cover and the housing 5 along with the refrigerant. Gaseous refrigerant enters the upper cavity of the motor through the gap between the upper part 21c and the lower part 22c of the oil stabilizer cover. Simultaneously, liquid lubricating oil falls back to the lower oil sump of the compressor housing through the gap between the lower part 22c of the oil stabilizer cover and the upper cylinder head 4.

[0057] As can be seen from Figure 10, the diameter of the first guide portion of the upper part 21c of the oil stabilizer near the lower part 22c can be larger than the diameter of the lower part 22c. In this case, the distance between the first guide portion of the upper part 21c of the oil stabilizer and the upper surface of the upper cylinder head 4 is less than the distance between the bottom surface of 22c and the upper surface of the upper cylinder head 4.

[0058] Figures 11 and 12 are schematic diagrams of the oil stabilizing cover according to the fourth embodiment of this utility model and partial structural diagrams of its application in a compressor, respectively. The oil stabilizing cover also includes multiple support columns 23d, which extend along the outer periphery of the first connecting portion of the upper part 21d to the outer periphery of the first guide portion and the second guide portion of the lower part 22d. When the oil stabilizing cover of the fourth embodiment is applied to a compressor, one end of the multiple support columns 23d near the second guide portion can be connected to the upper cylinder head 4, i.e., the oil stabilizing cover is fixed to the upper cylinder head 4 by the multiple support columns 23d. In this case, the outer diameter of the upper part 21d can also be smaller than the inner wall diameter of the housing 5, and the width of the second gap between the upper part 21d of the oil stabilizing cover and the inner wall of the housing 5 can be less than or equal to the gap h3 between the lower support of the motor and the housing. In the fourth embodiment, the upper part 21d and the lower part 22d of the oil stabilizing cover can be separate parts or one piece. Since it can be connected to the upper cylinder head 4 through the support column 23d, or to the inner wall of the housing 5 through the support column 23d, the first guide part of the oil stabilizing cover of both separate parts and one piece can be provided with a second gap between it and the inner wall of the housing 5.

[0059] Figure 13 is a schematic diagram of the oil stabilizing cover according to the fifth embodiment of the present invention. The upper part 21e of the oil stabilizing cover is the same as in the first embodiment. The lower part 22e of the oil stabilizing cover has a second connecting portion with a first through hole 2211e and a second through hole 2212e connected to the first through hole 2211e. When the oil stabilizing cover of the fifth embodiment is used in a compressor, the second through hole 2212e is positioned above the exhaust port of the muffler 3 to prevent the lower part 22e of the oil stabilizing cover from obstructing the exhaust port of the muffler 3 when the muffler 3 is not discharging from the middle outlet.

[0060] Figure 14 is a schematic diagram of the structure of the oil stabilizing cover according to the sixth embodiment of the present invention. The oil stabilizing cover also includes a blocking ring 24f connected to the upper outer periphery of the first connecting portion of the upper part 21f. The blocking ring 24f can be a planar ring. When the oil stabilizing cover of the sixth embodiment is used in a compressor, when the refrigerant and lubricating oil flowing back from the stator tangent enter the annular gap between the upper part 21f of the oil stabilizing cover and the compressor housing 5, the blocking ring 24f can prevent the refrigerant carrying the lubricating oil from returning through this annular gap, so that the refrigerant can only flow out from the gap between the upper parts 21f and 22f of the oil stabilizing cover.

[0061] The performance of a compressor using the oil stabilizer of this invention (the compressor of this invention) and a compressor without the oil stabilizer of this invention (referred to as a comparative compressor) were tested on an air conditioning system test bench. Under rated heating and low-temperature heating conditions, the oil level in the lower sight glass of the comparative compressor was low, while the lower sight glass of the compressor of this invention was full of oil. That is, the oil stabilizer of this invention can stabilize the oil level of the compressor, thereby improving the reliability of the compressor and extending its life.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0063] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An oil stabilizing cover, characterized in that, The device is located between the motor and pump body assembly of the compressor and includes an upper part and a lower part. The upper part includes an annular first connecting part and a first guide part connected to the first connecting part. The radial dimension of the first guide part toward the lower part is smaller than the radial dimension of the first connecting part. The lower part includes a second connecting part with a first through hole and a second guide part connected to the second connecting part. The outer periphery of the second guide part is inclined toward the pump body assembly relative to its inner periphery. The first guide part and the second guide part cooperate with each other and a first gap is provided between them.

2. The oil stabilizing cover according to claim 1, characterized in that, The width of the first gap is greater than or equal to 1 mm.

3. The oil stabilizing cover according to claim 1, characterized in that, The angle between the first connecting part and the axis of the compressor is β, which satisfies: 45° < β ≤ 180°; and / or the angle between the second guide part and the plane perpendicular to the axis of the compressor is θ, which satisfies: 0° < θ ≤ 90°.

4. The oil stabilizing cover according to claim 1, characterized in that, The radial dimension of the first guide portion toward the lower part is less than or equal to the radial dimension of the outer periphery of the second guide portion.

5. The oil stabilizing cover according to claim 1, characterized in that, The upper part and the lower part are separate components; the first gap is a continuous annular gap.

6. The oil stabilizing cover according to claim 1, characterized in that, The upper part and the lower part are a single piece; the first gap is a discontinuous, annularly distributed gap.

7. The oil stabilizing cover according to claim 1, characterized in that, The oil stabilizing cover also includes a plurality of support columns, which extend along the outer periphery of the first connecting portion to the outer periphery of the first guide portion and the second guide portion.

8. The oil stabilizing cover according to claim 1, characterized in that, The second connecting part is also provided with a second through hole that connects to the first through hole.

9. The oil stabilizing cover according to claim 1, characterized in that, The oil stabilizing cover also includes a blocking ring connected to the outer periphery of the first connecting portion.

10. A compressor, characterized in that, It includes a housing, a pump assembly housed in the housing, a motor housed in the housing, and an oil stabilizer as described in any one of claims 1 to 9.

11. The compressor according to claim 10, characterized in that, The pump body assembly includes an upper cylinder head and an upper muffler. The upper cylinder head has multiple channel holes on its outer periphery. The second connecting part is connected to the muffler. The projections of the first guide part and the second guide part on a plane perpendicular to the axis of the compressor completely cover the projections of the multiple channel holes on a plane perpendicular to the axis of the compressor.

12. The compressor according to claim 10, characterized in that, The first connecting part is connected to the inner wall of the housing.

13. The compressor according to claim 11, characterized in that, The oil stabilizer also includes a plurality of support columns, which extend along the outer periphery of the first connecting portion to the outer periphery of the first guide portion and the second guide portion; one end of the plurality of support columns near the second guide portion is connected to the upper cylinder head.

14. The compressor according to claim 12 or 13, characterized in that, A second gap is provided between the first connecting part and the inner wall of the housing, and the width of the second gap is less than or equal to the gap between the lower bracket of the motor and the housing.

15. The compressor according to claim 11, characterized in that, The second connecting part is also provided with a second through hole connected to the first through hole; the second through hole is located above the exhaust hole of the upper muffler.

16. The compressor according to claim 11, characterized in that, The distance between the outer periphery of the second guide portion and the upper end face of the upper cylinder head projected onto the compressor axis is greater than or equal to 1 mm.

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