compressor

Abstract

The application provides a compressor, which comprises a shell, a silencer, an upper cylinder cover, wherein the silencer comprises a cavity shell and a rim part arranged around the outer periphery of the cavity shell, the cavity shell is protruded to form a cavity, the upper cylinder cover has a bottom, a bearing is arranged at the center of the bottom, an upwardly extending skirt is arranged around the bottom, and a groove is formed by the bottom and the skirt, the silencer and the upper cylinder cover are arranged in the shell, the upper cylinder cover is connected with the shell, the rim part of the silencer is matched with the skirt of the upper cylinder cover, and the groove of the upper cylinder cover and the cavity in the cavity shell form a silencing cavity together, and the volume of the silencing cavity is increased, and the silencing performance of the silencer is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor, in particular to a compressor. BACKGROUND

[0002] Generally, a silencer is installed inside a rotor compressor. The outer diameter of the upper cylinder cover is larger than that of the cylinder, and the upper cylinder cover is directly welded to the inner wall of the shell. The sound attenuation performance of the silencer depends on the geometric shape of the space surrounded by the inner surface. Generally, the larger the volume of the silencer cavity, the better the sound attenuation performance. The silencer in the existing rotor compressor is usually fixed to the mounting plane at the upper end of the upper cylinder cover, and it is difficult to expand the radial and axial dimensions, which restricts the improvement of the performance of the silencer. SUMMARY

[0003] Therefore, the present application provides a compressor to improve the sound attenuation performance of the silencer inside the compressor.

[0004] According to one aspect of the present application, a compressor is provided, comprising:

[0005] a shell;

[0006] a silencer comprising a cavity shell and an outer edge portion arranged around the outer periphery of the cavity shell, the cavity shell protruding to form a cavity; and

[0007] an upper cylinder cover having a bottom portion with a bearing arranged at the center of the bottom portion, a skirt extending upward around the bottom portion, and a groove formed by the bottom portion and the skirt;

[0008] The silencer and the upper cylinder cover are arranged in the shell, and the upper cylinder cover is connected to the shell. The outer edge portion of the silencer is fitted to the skirt of the upper cylinder cover, and the groove of the upper cylinder cover and the cavity inside the cavity shell form a sound attenuation cavity together.

[0009] Optionally, the outer edge portion of the silencer extends inwardly to form a plurality of inwardly extending regions, the skirt of the upper cylinder cover has a plurality of first bosses formed by locally protruding inwardly in regions corresponding to the inwardly extending regions, and the first bosses are fixedly connected to the inwardly extending regions of the outer edge portion.

[0010] Optionally, the inwardly extending regions are provided with first mounting holes, and the first bosses are provided with second mounting holes, and the first mounting holes and the second mounting holes are connected together.

[0011] Optionally, the maximum outer diameter of the silencer is r_1, and the outer diameter of the upper cylinder cover is r_2, wherein r_1 and r_2 satisfy: 0.9≤(r_1 / r_2)≤1.

[0012] Optionally, the compressor further comprises a cylinder block arranged on the side of the upper cylinder cover away from the muffler; the bottom of the upper cylinder cover is connected with the cylinder block; the outer diameter of the upper cylinder cover is larger than the maximum outer diameter of the cylinder block; the bottom of the upper cylinder cover in the recess is provided with a third mounting hole and a cylinder exhaust valve, and the third mounting hole is used for fixedly connecting the upper cylinder cover with the cylinder block.

[0013] Optionally, the radial distance between the third mounting hole and the bearing is smaller than the radial length between the first boss and the bearing.

[0014] Optionally, the bottom of the upper cylinder cover between the adjacent first bosses is concave in the direction away from the muffler to form a plurality of blind holes.

[0015] Optionally, the outer periphery of the upper cylinder cover is partially concave to form a first oil return hole penetrating the upper and lower end faces of the upper cylinder cover, and the outer edge of the muffler is partially concave to form a second oil return hole penetrating the upper and lower end faces of the outer edge, the first oil return hole and the second oil return hole are in communication with each other and the inner wall of the shell to form an oil return channel for returning the oil in the compressor to the bottom of the compressor.

[0016] Optionally, the bottom of the upper cylinder cover between the adjacent first bosses is concave in the direction away from the muffler to form a plurality of through holes, and the upper cylinder cover further comprises an annular baffle arranged on the side of the bottom away from the muffler, and the annular baffle is used for shielding the through holes.

[0017] Optionally, the muffler is in a multi-lap cavity structure or a ring cavity structure.

[0018] The beneficial effects of the present application compared with the prior art are:

[0019] The compressor provided by the present application expands the outer diameter of the muffler in the radial direction, so that the muffler and the skirt of the upper cylinder cover are fitted and installed to form a seal, which is different from the prior art in which the muffler is installed on the second boss at the upper end of the upper cylinder cover, thereby increasing the volume of the muffling cavity and improving the muffling performance of the muffler. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained from these drawings without creative labor for those skilled in the art.

[0021] Figure 1 The partial exploded view of the compressor disclosed for an embodiment of the present application shows the muffler and the upper cylinder cover;

[0022] Figure 2 Fig. 1 is a perspective view of a compressor according to the present application; Figure 1 Fig. 2 is a cross-sectional view of the compressor of Fig. 1 taken along line 2-2 of Fig. 1;

[0023] Figure 3 Fig. 3 is a top view of the compressor of Fig. 1 taken along line 3-3 of Fig. 1; Figure 1 Fig. 4 is a cross-sectional view of the compressor of Fig. 1 taken along line 4-4 of Fig. 1;

[0024] Figure 4 Fig. 5 is a perspective view of the compressor muffler of Fig. 1; Figure 1 Fig. 6 is a cross-sectional view of the compressor muffler of Fig. 1 taken along line 6-6 of Fig. 5;

[0025] Figure 5 Fig. 7 is a top view of the compressor muffler of Fig. 1 taken along line 7-7 of Fig. 5; Figure 1 Fig. 8 is a cross-sectional view of the compressor muffler of Fig. 1 taken along line 8-8 of Fig. 5;

[0026] Figure 6 Fig. 9 is a perspective view of the compressor upper cylinder head of Fig. 1; Figure 1 Fig. 10 is a cross-sectional view of the compressor upper cylinder head of Fig. 1 taken along line 10-10 of Fig. 9;

[0027] Figure 7 Fig. 11 is a top view of the compressor upper cylinder head of Fig. 1 taken along line 11-11 of Fig. 9; Figure 1 Fig. 12 is a cross-sectional view of the compressor upper cylinder head of Fig. 1 taken along line 12-12 of Fig. 9;

[0028] Figure 8 Fig. 13 is a perspective view of the compressor lower cylinder head of Fig. 1;

[0029] Figure 9 Fig. 14 is a cross-sectional view of the compressor lower cylinder head of Fig. 1 taken along line 14-14 of Fig. 13;

[0030] Figure 10 Fig. 15 is a perspective view of the compressor ring baffle of Fig. 1;

[0031] Figure 11 Fig. 16 is a top view of the compressor ring baffle of Fig. 1 taken along line 16-16 of Fig. 15; Figure 10 Fig. 17 is a cross-sectional view of the compressor ring baffle of Fig. 1 taken along line 17-17 of Fig. 15; Fig. 18 is a cross-sectional view of the compressor ring baffle of Fig. 1 taken along line 18-18 of Fig. 15;

[0032] Fig. 19 is a graph of the transmission loss curve of the compressor of Fig. 1. Figure 12 DETAILED DESCRIPTION

[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. However, these example 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 invention will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details described, or other methods, materials, apparatus, etc., can be employed. In other instances, well-known technical solutions are not shown or described in detail to avoid obscuring aspects of this disclosure. The same reference numerals in the figures denote the same or similar structures, and therefore their detailed descriptions are omitted.

[0034] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including,” “having,” and “have” are used to indicate an open-ended inclusion meaning and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0035] like Figures 1 to 8 As shown, an embodiment of the present invention discloses a compressor. The compressor includes a muffler 1, an upper cylinder head 2, a cylinder body 3, and a housing 5. The muffler 1, the upper cylinder head 2, and the cylinder body 3 are all located inside the housing 5. The outer diameter of the upper cylinder head 2 is larger than the maximum outer diameter of the cylinder body 3. The upper cylinder head 2 is directly welded to the inner wall of the housing 5.

[0036] The muffler 1 includes a housing and an outer edge 100 surrounding the outer periphery of the housing, the housing protruding to form a cavity. The upper cylinder head 2 has a bottom 200, a bearing at the center of the bottom 200, an upwardly extending skirt 201 surrounding the bottom 200, and a groove 202 formed by the bottom 200 and the skirt 201. The outer edge 100 of the muffler 1 fits against the skirt 201 of the upper cylinder head 2, and the groove 202 of the upper cylinder head 2 and the cavity inside the housing together form a muffler cavity.

[0037] The outer edge part 100 of the muffler 1 is provided with a first mounting hole 101, and the skirt 201 of the upper cylinder cover 2 is provided with a second mounting hole 204. The first mounting hole 101 and the second mounting hole 204 are matched and mounted to fix the muffler 1 and the upper cylinder cover 2. Further, the outer edge part 100 of the muffler 1 is partially extended inward to form a plurality of inward extension areas, and the skirt 201 of the upper cylinder cover 2 is partially inwardly protruded to form a plurality of first protrusions 203 corresponding to the inward extension areas. The first protrusions 203 are matched and fixedly connected with the inward extension areas of the outer edge part 100. The inward extension areas are provided with the first mounting hole 101, and the first protrusions 203 are provided with the second mounting hole 204. The first mounting hole 101 and the second mounting hole 204 are matched and connected to fix the muffler 1 and the upper cylinder cover 2.

[0038] In addition, the connection mode of the muffler 1 and the upper cylinder cover 2 is not limited to screwing, and in other embodiments, welding, gluing and other connection modes can also be used. In this way, it is also beneficial to further increase the volume of the muffling cavity and improve the muffling performance.

[0039] The maximum outer diameter of the muffler 1 is greater than the inner diameter of the skirt 201. In this way, the outer edge part 100 of the muffler 1 is fitted and assembled with the skirt 201 of the upper cylinder cover 2, which is beneficial to increase the volume of the muffling cavity. Unlike the prior art, the maximum outer diameter of the muffler 1 is smaller than the inner diameter of the skirt 201. The muffler 1 is directly installed in the groove 202 inside the upper cylinder cover 2. Therefore, for the same specification compressor, the volume of the muffling cavity of the present application is greater than that of the prior art, which is beneficial to improve the muffling performance of the muffler 1.

[0040] In the present embodiment, the maximum outer diameter of the muffler 1 is r1, and the outer diameter of the upper cylinder cover 2 is r2, wherein r1 and r2 satisfy: 0.9≤(r1 / r2)≤1. In this way, it is beneficial to make full use of the internal space in the groove 202 of the upper cylinder cover 2, and on the other hand, to increase the volume of the internal cavity of the muffler 1, thereby increasing the volume of the muffling cavity and improving the muffling performance of the muffler 1.

[0041] In the present embodiment, the cylinder block 3 is arranged on the side of the upper cylinder cover 2 away from the muffler 1. The bottom 200 of the upper cylinder cover 2 located in the groove 202 is provided with a third mounting hole 207 and a cylinder exhaust valve.

[0042] The third mounting hole 207 is used to fixedly connect the bottom 200 of the upper cylinder cover 2 and the cylinder block 3 together. The radial distance of the third mounting hole 207 from the bearing is less than the radial length of the first protrusion 203 from the bearing. In the prior art, the muffler 1 is usually assembled in the groove 202. In this case, the volume of the muffling cavity formed is significantly smaller, which will affect the muffling performance of the compressor muffler 1.

[0043] The muffler 1 is provided with an exhaust hole, and the cylinder block 3 is provided with an exhaust port which is aligned with the cylinder exhaust valve of the upper cylinder head 2. The high-temperature and high-pressure gas generated after compression enters the muffling cavity through the exhaust port of the cylinder block 3 and the cylinder exhaust valve of the upper cylinder head 2, and then is discharged into the compressor housing through the exhaust hole of the cavity shell. The exhaust hole can be arranged on the top or sidewall of the cavity shell, which is not limited in the present application.

[0044] In the embodiment, the bottom 200 of the upper cylinder head 2 between the adjacent first bosses 203 is concave inward to form a plurality of blind holes 206 in the direction away from the muffler 1. That is, the area between the adjacent first bosses 203 is provided with blind holes 206 with a greater depth than the bottom 200 of the groove 202, that is, the thickness of the bottom of the blind hole 206 is less than the thickness of the bottom 200 of the groove 202, which is beneficial to further increase the volume of the muffling cavity and improve the muffling performance. The arrangement of the blind hole 206 is beneficial to enhance the reflection of sound waves, thereby improving the muffling performance of the muffler 1.

[0045] In the embodiment, the outer periphery of the upper cylinder head 2 is partially concave to form a first oil return hole 208 which penetrates the upper end surface and the lower end surface of the upper cylinder head 2. The outer edge 100 of the muffler 1 is partially concave to form a second oil return hole 102 which penetrates the upper end surface and the lower end surface of the outer edge 100. After assembly, the first oil return hole 208 communicates with the second oil return hole 102, and together with the inner wall of the shell 5 forms an oil return channel for returning the oil in the compressor to the bottom of the compressor. In this way, the internal space of the upper cylinder head 2 is not occupied for oil return under the condition of meeting the oil return of the compressor, which is beneficial to fully utilize the internal space of the upper cylinder head 2, thereby increasing the volume of the muffling cavity and improving the muffling performance of the muffler 1.

[0046] In the embodiment, the radial width of the outer edge 100 of the muffler 1 is less than or equal to the radial width of the first boss 203. In this way, it is beneficial to increase the volume of the internal cavity of the muffler 1, thereby increasing the volume of the muffling cavity and improving the muffling performance of the muffler 1.

[0047] In the embodiment, the first boss 203 extends inward along the radial direction of the upper cylinder head 2 to connect with the bottom 200 of the upper cylinder head 2. In this way, it is beneficial to enhance the rigidity of the upper cylinder head 2.

[0048] The muffler 1 has a multi-petal cavity structure or a ring cavity structure. The material of the muffler 1 is steel or synthetic resin. However, the present application is not limited thereto.

[0049] It should be noted that the radial direction in the present application refers to the radial direction of the upper cylinder head 2.

[0050] As Figure 10 andFigure 11 As shown, another embodiment of the present application is based on any of the above embodiments, and further discloses another compressor. The upper cylinder head of the compressor further comprises an annular baffle 4, which is arranged on the bottom 200 of the upper cylinder head 2 away from the muffler 1. The upper cylinder head 2 is recessed in the direction away from the muffler 1 on the bottom 200 between the adjacent first bosses 203 to form a plurality of through holes. The annular baffle 4 is used to shield the through holes.

[0051] Figure 12 The transmission loss curve of the noise in the compressor of the present application is shown in FIG. 6. Referring to FIG. 6, the horizontal axis X is the sound frequency (Hz), and the vertical axis Y is the transmission loss (dB). The dotted line M is the transmission loss reduction trajectory for different sound frequencies in the prior art, and the solid line N is the transmission loss reduction trajectory for different sound frequencies after using the present application. It can be seen that the present application can effectively reduce noise in the frequency band of 10 Hz to 500 Hz. Figure 12 Figure 12

[0052] In summary, the compressor provided by the present application has at least the following advantages:

[0053] The compressor disclosed in the embodiment enlarges the outer diameter of the muffler in the radial direction, so that the muffler and the skirt of the upper cylinder head are fitted and installed to form a seal. Unlike the prior art in which the muffler is installed on the second boss at the upper end of the upper cylinder head, the volume of the muffling cavity is increased, and the muffling performance of the muffler is improved.

[0054] In the description of the present application, it should be understood that the terms "bottom", "longitudinal", "transverse", "upper", "lower", "front", "rear", "vertical", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the referred structure or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "a plurality of" means two or more, and "several" means one or more.

[0055] ​​In the description of the specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" and the like refers to the fact that a particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearance of the above-mentioned terms in various places in the specification are not necessarily referring to the same embodiment or example. Also, the particular features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0056] The above is further detailed description of the present application in combination with specific preferred embodiments, and cannot be deemed as limitation of the specific implementation of the present application to these descriptions. For those skilled in the art of the present application, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the protection scope of the present application.

Claims

1. A compressor characterized by, The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor.

2. The compressor of claim 1, wherein, The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor.

3. The compressor of claim 2, wherein, The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. The application relates to a muffler (1) and an upper cylinder cover (2) and a shell (5) for a compressor. 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The compressor of claim 2, wherein, The compressor further comprises a cylinder block (3) arranged on the side of the upper cylinder cover (2) away from the muffler (1); the bottom (200) of the upper cylinder cover (2) is connected with the cylinder block (3); the outer diameter of the upper cylinder cover (2) is greater than the maximum outer diameter of the cylinder block (3); the bottom (200) of the upper cylinder cover (2) in the recess (202) is provided with a third mounting hole (207) and a cylinder exhaust valve, and the third mounting hole (207) is used for fixedly connecting the upper cylinder cover (2) with the cylinder block (3).

5. The compressor of claim 4, wherein, The radial distance of the third mounting hole (207) from the bearing is less than the radial length of the first boss (203) from the bearing.

6. The compressor of claim 1, wherein, The muffler (1) is in a multi-lap cavity structure or a ring cavity structure.

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