阅读说明：本技术 一种压缩机泵体以及压缩机 (Compressor pump body and compressor ) 是由 龚沛 邓燕 于 2021-09-08 设计创作，主要内容包括：本发明涉及一种压缩机泵体以及压缩机,所述压缩机泵体包括消音盖以及轴承；消音盖包括第一消音盖,其包括一体加工成型的固定部以及边缘与所述固定部固定连接的凸出部,所述轴承包括轴承柄部以及轴承法兰,所述轴承法兰设置有凹槽,所述轴承柄部的外周面、所述轴承法兰的端面以及所述凹槽与所述消音盖围合形成流通腔室、若干连接通道以及若干共鸣腔室,其中所述流通腔室与所述轴承排气孔相连通,所述共鸣腔室为仅通过所述连接通道与所述流通腔室相连通的密闭腔室,且所述连接通道的流通横截面积小于所述共鸣腔室在所述轴承法兰端面的投影面积,利用所述连接通道与所述共鸣腔室构成亥姆霍兹共鸣器,有效提高消音效果。(The invention relates to a compressor pump body and a compressor, wherein the compressor pump body comprises a silencing cover and a bearing; the amortization lid includes first amortization lid, its fixed part and edge that includes integrated into one piece shaping with fixed part fixed connection's bulge, the bearing includes bearing stalk portion and bearing flange, the bearing flange is provided with the recess, the outer peripheral face of bearing stalk portion the terminal surface of bearing flange and the recess with the amortization lid encloses to close and forms circulation cavity, a plurality of interface channel and a plurality of sympathetic response cavity, wherein the circulation cavity with the bearing exhaust hole is linked together, the sympathetic response cavity is only through interface channel with the airtight cavity that the circulation cavity is linked together, just interface channel's flow cross-sectional area is less than the sympathetic response cavity is in the projection area of bearing flange terminal surface utilizes interface channel with the sympathetic response cavity constitutes the helmholtz resonator, effectively improves noise cancelling effect.)

1. A compressor pump body characterized in that: comprises a silencing cover and a bearing;

the silencing cover comprises a first silencing cover, the first silencing cover comprises a fixing part and a protruding part, the fixing part is integrally formed, the edge of the protruding part is fixedly connected with the fixing part, and a shaft hole is formed in the protruding part in a penetrating mode;

the bearing comprises a bearing handle part and a bearing flange annularly arranged on the outer side of one end of the bearing handle part, the bearing handle part is arranged in the shaft hole in a penetrating mode, the bearing flange is detachably fixed with the fixing part, the bearing flange is provided with a bearing exhaust hole and a groove, and the groove is located in the end face, facing the first silencing cover, of one side of the bearing flange; the outer peripheral face of bearing stalk portion the terminal surface of bearing flange and the recess with first amortization lid encloses and closes and form interior amortization chamber, interior amortization chamber is including circulation cavity, a plurality of interface channel and a plurality of sympathetic response cavity, wherein the circulation cavity with the bearing exhaust hole is linked together, the sympathetic response cavity is only through interface channel with the airtight cavity that the circulation cavity is linked together, just interface channel's circulation cross-sectional area is less than the sympathetic response cavity is in the projection area of bearing flange terminal surface.

2. The compressor pump body of claim 1, wherein: the bulge of the silencing cover comprises a first bulge and a second bulge which are fixedly connected; the first bulge penetrates through the shaft hole, and the first bulge, the outer peripheral surface of the bearing handle part and the end surface of the bearing flange enclose to form the circulation chamber; the second bulge comprises a connecting part and a bulge body, the connecting part and the end face of the bearing flange are enclosed to form the connecting channel, and the bulge body corresponds to the groove and is enclosed to form the resonance chamber.

3. The compressor pump body of claim 2, wherein: the projection of the boss body on the end face of the bearing flange is a polygon with a rounded corner R, wherein R is more than 0.1mm and less than 10 mm; the groove is in a shape matched with the projection of the bulge body on the end face of the bearing flange; the connecting passage communicates with one end or the middle of the resonance chamber.

4. The compressor pump body of claim 1, wherein: the bulge of the silencing cover comprises a first bulge and a second bulge which are independent from each other; the first bulge penetrates through the shaft hole, and the first bulge, the outer peripheral surface of the bearing handle part and the end surface of the bearing flange enclose to form a circulation chamber; the second boss and the end face of the bearing flange enclose to form the resonance chamber; the recess includes the bar spread groove, the bar spread groove with the fixed part encloses to close and forms connect the passageway.

5. The compressor pump body of claim 1, wherein: the bulge of the silencing cover comprises a first bulge and a second bulge which are independent from each other; the first bulge penetrates through the shaft hole, and the first bulge, the outer peripheral surface of the bearing handle part and the end surface of the bearing flange enclose to form a circulation chamber; the recess is including the bar spread groove and the cavity groove that are linked together, the bar spread groove with the fixed part encloses to close and forms connect the passageway, the cavity groove with the position of second bellying is corresponding to enclose and close and form the sympathetic response cavity.

6. The compressor pump body of claim 5, wherein: the projection of the second bulge on the end face of the bearing flange is a polygon with a rounded corner R, wherein R is more than 0.1mm and less than 10 mm; the cavity groove is in a shape matched with the projection of the second boss on the end face of the bearing flange; the connecting passage communicates with one end or the middle of the resonance chamber.

7. The compressor pump body according to any one of claims 3 to 6, wherein: the perpendicular protruding height of second bellying is h1, the degree of depth of recess is h2, the sympathetic response chamber is in the projected area of bearing flange terminal surface is S1, the cross-sectional area of circulation of linking channel is S2, the volume of sympathetic response chamber is V1, the radial length of linking channel is L, and wherein h1 < 20mm, h2 < 12mm, S1 < 2800mm²，S2＜30mm²L < 30mm, wherein each parameter relationship is

8. The compressor pump body of claim 1, wherein: the silencing cover further comprises a second silencing cover which is detachably fixed outside the first silencing cover and forms an outer silencing cavity in a surrounding mode with the first silencing cover, and the outer silencing cavity is communicated with the circulation cavity.

9. The compressor pump body of claim 8, wherein: also includes a cylinder assembly; the bearing comprises a first bearing and a second bearing, and the first bearing, the cylinder assembly and the second bearing are detachably fixed in sequence and form an independent refrigerant compression working space; the fixing part of the silencing cover is detachably fixed with the bearing flange of the first bearing and/or the second bearing through a plurality of fixing screws.

10. A compressor, characterized by: comprising a compressor pump body according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of compressors, in particular to a compressor pump body and a compressor.

Background

A compressor is a driven fluid machine that raises low-pressure gas into high-pressure gas, and is a heart of a refrigeration system. The high-pressure low-temperature refrigerant gas is sucked from the air suction pipe, the piston is driven by the operation of the motor to compress the low-temperature low-pressure refrigerant gas, and the high-temperature high-pressure refrigerant gas is discharged to the exhaust pipe to provide power for a refrigeration cycle, so that the high-pressure low-temperature low-pressure refrigerant gas is generally used in refrigeration equipment such as an air conditioner and the like. Based on the improvement of the requirements of people on living quality, the development of the silencing of the air conditioner is more and more concerned by people, and the silencing of the air conditioner during working is an important condition for ensuring the comfort of users. The source of the noise generated by the air conditioner is various, wherein the noise generated by the compressor of the air conditioner is one of the main sources, so that the reduction of the noise of the compressor is particularly important for realizing the silencing of the air conditioner.

The compressor pump body is a structure used for realizing refrigerant compression in the compressor, and comprises an upper bearing, a lower bearing, a silencing cover, a cylinder assembly, a piston, a crankshaft and other structures, wherein the silencing cover is sleeved on the crankshaft and forms a silencing cavity in a surrounding manner with the upper bearing and/or the lower bearing, and refrigerant gas compressed by the cylinder assembly is discharged into the silencing cavity from a compression cavity of the cylinder through an exhaust port on the upper bearing, so that silencing and noise reduction are realized. When the compressor is operated, the flow of refrigerant gas and the opening and closing of the discharge valve cause strong impact noise, and have a wide frequency range, which is a main noise source of the compressor. The structure of the existing silencing cover for the compressor is single, please refer to fig. 1, fig. 1 is a schematic structural diagram of the silencing cover for the compressor in the prior art, the silencing cover is fixed with a bearing of the compressor through a fixing screw, the silencing cover comprises a silencing cover 1, the silencing cover 1 is provided with a plurality of fixing holes 11 for the fixing screw to penetrate through, the silencing cover 1 avoids the fixing holes 11 to form a protrusion 12, and the protrusion 12 and the end surface of the upper bearing or the lower bearing are enclosed to form a silencing cavity; for improving the noise cancelling effect, the scheme that the noise purpose is improved through the position and the size of adjustment exhaust hole is reached in the current, but this kind of improvement mode effect is not obvious, in addition still has the scheme that reduces the noise through the mode that increases amortization lid thickness or use multiple amortization lid, but this mode effect is equally not obvious, has still additionally increased the cost, and through the mode that increases thickness it can't realize eliminating the effect of specific frequency channel noise.

Disclosure of Invention

Based on this, the invention aims to provide a compressor pump body which has the advantages of simple structure, low production and processing difficulty, low cost and low noise.

A compressor pump body comprises a silencing cover and a bearing;

the silencing cover comprises a first silencing cover, and the first silencing cover comprises a fixing part and a protruding part, wherein the fixing part is integrally formed, and the edge of the protruding part is fixedly connected with the fixing part; the protruding part is provided with a shaft hole in a penetrating way;

the bearing comprises a bearing handle part and a bearing flange annularly arranged on the outer side of one end of the bearing handle part, the bearing handle part is arranged in the shaft hole in a penetrating mode, the bearing flange is detachably fixed with the fixing part, the bearing flange is provided with a bearing exhaust hole and a groove, and the groove is located in the end face, facing the first silencing cover, of one side of the bearing flange; the outer peripheral face of bearing stalk portion the terminal surface of bearing flange and the recess with first amortization lid encloses and closes and form interior amortization chamber, interior amortization chamber is including circulation cavity, a plurality of interface channel and a plurality of sympathetic response cavity, wherein the circulation cavity with the bearing exhaust hole is linked together, the sympathetic response cavity is only through interface channel with the airtight cavity that the circulation cavity is linked together, just interface channel's circulation cross-sectional area is less than the sympathetic response cavity is in the projection area of bearing flange terminal surface.

According to the compressor pump body provided by the embodiment of the invention, through the optimized design of the structure of the silencing cover, the silencing cover and the bearing are enclosed to form a circulation chamber, a connecting channel and a resonance chamber, wherein the circulation chamber is communicated with the bearing exhaust hole, the connecting channel with the smaller circulation cross-sectional area relative to the resonance chamber and the resonance chamber can form a Helmholtz resonator, compressed high-temperature and high-pressure refrigerant gas enters the circulation chamber through the bearing exhaust hole and is exhausted, resonance silencing is formed when the refrigerant gas flows through the inlet of the connecting channel, and the silencing effect is effectively improved; the silencing cover is simple in structure and low in production and processing difficulty in an integrated forming mode, and compared with a scheme that the thickness of the silencing cover is increased or a plurality of silencing covers are arranged to improve the silencing effect, the scheme provided by the embodiment of the invention can avoid the increase of cost, and meanwhile, noise in a specific frequency band can be eliminated through the position and size adjustment of the connecting channel and the resonance chamber, so that a sound frequency band sensitive to human ears can be eliminated in a targeted manner, and the silencing effect is greatly improved.

Further, the lug boss of the silencing cover comprises a first lug boss and a second lug boss which are fixedly connected; the first bulge penetrates through the shaft hole, and the first bulge, the outer peripheral surface of the bearing handle part and the end surface of the bearing flange enclose to form the circulation chamber; the second bulge comprises a connecting part and a bulge body, the connecting part and the end face of the bearing flange are enclosed to form the connecting channel, and the bulge body corresponds to the groove and is enclosed to form the resonance chamber. The volume of the resonance chamber is effectively enlarged by utilizing the grooves, and the noise reduction effect is effectively improved.

Furthermore, the projection of the boss body on the end face of the bearing flange is a polygon with a fillet R, wherein R is more than 0.1mm and less than 10 mm; the groove is in a shape matched with the projection of the bulge body on the end face of the bearing flange; the connecting passage communicates with one end or the middle of the resonance chamber.

Further, the boss of the silencing cover comprises a first boss and a second boss which are independent from each other; the first bulge penetrates through the shaft hole, and the first bulge, the outer peripheral surface of the bearing handle part and the end surface of the bearing flange enclose to form a circulation chamber; the second boss and the end face of the bearing flange enclose to form the resonance chamber; the recess includes the bar spread groove, the bar spread groove with the fixed part encloses to close and forms connect the passageway.

Further, the boss of the silencing cover comprises a first boss and a second boss which are independent from each other; the first bulge penetrates through the shaft hole, and the first bulge, the outer peripheral surface of the bearing handle part and the end surface of the bearing flange enclose to form a circulation chamber; the recess is including the bar spread groove and the cavity groove that are linked together, the bar spread groove with the fixed part encloses to close and forms connect the passageway, the cavity groove with the position of second bellying is corresponding, the cavity groove the terminal surface of bearing flange with the second bellying encloses to close and forms the sympathetic response cavity, or the cavity groove with the second bellying encloses to close and forms the sympathetic response cavity.

Utilize the bar-shaped connecting groove with the fixed part encloses to close and forms connect the passageway, can avoid the amortization covers the problem that the processing degree of difficulty that the punching press formed narrow arch and caused increases. The arrangement of the chamber groove can help to enlarge the volume of the resonance chamber, so that the silencing effect is improved.

Furthermore, the projection of the second bulge on the end face of the bearing flange is a polygon with a fillet R, wherein R is more than 0.1mm and less than 10 mm; the cavity groove is in a shape matched with the projection of the second boss on the end face of the bearing flange; the connecting passage communicates with one end or the middle of the resonance chamber.

Further, the vertical protrusion height of the second protrusion is h1, the depth of the groove is h2, the projection area of the resonance chamber on the end face of the bearing flange is S1, the flow cross-sectional area of the connecting channel is S2, the volume of the resonance chamber is V1, the radial length of the connecting channel is L, wherein h1 is less than 20mm, h2 is less than 12mm, and S1 is less than 2800mm²，S2＜30mm²L < 30mm, wherein each parameter relationship isThrough the parameter limitation, the optimized frequency band of the resonance chamber can be preferably adjusted to the sensitive frequency band of human ears, and the noise of the frequency band is optimized, so that the influence caused by the noise can be greatly reduced from the hearing feeling of a user.

Furthermore, the silencing cover further comprises a second silencing cover which is detachably fixed outside the first silencing cover and forms an outer silencing cavity with the first silencing cover in a surrounding mode, and the outer silencing cavity is communicated with the circulation cavity. The setting of double-deck amortization lid can further be to noise reduction, improves user's use and feels.

Further, the air cylinder assembly is further included; the bearing comprises a first bearing and a second bearing, and the first bearing, the cylinder assembly and the second bearing are detachably fixed in sequence and form an independent refrigerant compression working space; the fixing part of the silencing cover is detachably fixed with the bearing flange of the first bearing and/or the second bearing through a plurality of fixing screws.

In addition, the embodiment of the invention also provides a compressor, which comprises the compressor pump body.

The compressor provided by the embodiment of the invention has the advantages of low noise and low production and processing cost by using the compressor pump body.

For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a muffler cover for a compressor according to the prior art;

fig. 2 is a schematic structural view of a first silencing cover according to embodiment 1 of the present invention;

FIG. 3 is a schematic top view of a first silencing cover structure according to embodiment 1 of the present invention;

FIG. 4 is a schematic view of a bearing structure according to embodiment 1 of the present invention;

FIG. 5 is a schematic top view of a bearing structure according to embodiment 1 of the present invention;

fig. 6 is a schematic projection view of the flow-through chamber, the connecting passage, the resonance chamber, and the shaft hole on the end face of the bearing flange according to embodiment 1 of the present invention;

FIG. 7 is a schematic view of a pump body structure of a compressor according to embodiment 1 of the present invention;

fig. 8 is a schematic structural view of a first silencing cover according to embodiment 2 of the present invention;

fig. 9 is a schematic top view of a first silencing cover structure according to embodiment 2 of the present invention;

FIG. 10 is a schematic view of a bearing structure according to embodiment 2 of the present invention;

FIG. 11 is a schematic top view of a bearing structure according to embodiment 2 of the present invention;

fig. 12 is a schematic structural view of a first silencing cover according to embodiment 3 of the present invention;

FIG. 13 is a schematic view of a bearing structure according to embodiment 3 of the present invention;

FIG. 14 is a schematic top view of a bearing structure according to embodiment 3 of the present invention;

FIG. 15 is a graph showing the measured noise spectrum of a compressor assembled with a first muffling cover according to embodiment 3 of the present invention;

fig. 16 is a diagram illustrating the analysis result of the noise transmission loss CAE between the first silencing cover according to embodiment 3 of the present invention and the silencing cover according to the prior art.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Example 1

The embodiment 1 of the invention provides a compressor pump body which comprises a silencing cover and a bearing 2.

The silencing cover includes a first silencing cover 1, please refer to fig. 2-3, fig. 2 is a schematic structural view of the first silencing cover in embodiment 1 of the present invention, fig. 3 is a schematic structural view of the first silencing cover in embodiment 1 of the present invention, as shown in the figure, the first silencing cover 1 includes a fixing portion 11 formed by integral processing and a protruding portion 12 whose edge is fixedly connected with the fixing portion 11; the protrusion 12 has a shaft hole 124.

Referring to fig. 4-5, fig. 4 is a schematic view of a bearing structure according to embodiment 1 of the present invention, fig. 5 is a schematic view of a bearing structure according to embodiment 1 of the present invention from above, a bearing 2 includes a bearing handle 21 and a bearing flange 22 annularly disposed at an outer side of one end of the bearing handle 21, the bearing handle 21 is inserted into a shaft hole 124, the bearing flange 22 is detachably fixed to the fixing portion 11, the bearing flange 22 is provided with a bearing exhaust hole 23 and a groove 24, the bearing exhaust hole 23 is disposed along an axial direction of the bearing 2, and the groove 24 is located at an end surface of one side of the bearing flange 22 facing the first sound-deadening cap 1.

The outer peripheral surface of the bearing handle 21, the end surface of the bearing flange 22, the groove 24 and the first muffling cover 1 enclose to form an internal muffling cavity, the internal muffling cavity includes a flow chamber a, a plurality of connecting channels B and a plurality of resonance chambers C, wherein, referring to fig. 6, fig. 6 is a schematic projection diagram of the flow chamber, the connecting channels, the resonance chambers and the shaft hole on the end surface of the bearing flange in embodiment 1 of the present invention, as shown in the figure, the flow chamber a is communicated with the bearing exhaust hole 23, the resonance chambers C are closed chambers communicated with the flow chamber a only through the connecting channels B, and the flow cross-sectional area of the connecting channels B is smaller than the projection area of the resonance chambers C on the end surface of the bearing flange 22.

In the compressor pump body according to embodiment 1 of the present invention, through an optimized design of the structure of the sound-deadening cover, the sound-deadening cover and the bearing are enclosed to form a flow-through chamber, a connection channel, and a resonance chamber, wherein the flow-through chamber is communicated with the bearing exhaust hole, the connection channel having a smaller flow cross-sectional area relative to the resonance chamber and the resonance chamber can form a helmholtz resonator, and the original shape of the helmholtz resonator is a container having a narrow neck or a small opening, and when subjected to sound waves, air in the neck vibrates, and the air in the container generates a restoring force. In the case of a wave length of sound much greater than the geometric dimensions of the resonator, it is believed that the kinetic energy of the air vibration inside the resonator is concentrated in the movement of the air inside the neck, and the potential energy is only related to the elastic deformation of the air inside the container. Thus, the resonator is a one-dimensional vibration system consisting of the effective mass of air in the neck and the elasticity of air in the container, so that the resonator has a resonance phenomenon on acting sound waves and can eliminate a fixed frequency band. Therefore, the compressed high-temperature and high-pressure refrigerant gas enters the circulation chamber through the bearing exhaust hole and is exhausted, resonance noise reduction is formed when the refrigerant gas flows through the inlet of the connecting channel, and the noise reduction effect is effectively improved; the silencing cover is simple in structure and low in production and processing difficulty in an integrated forming mode, and compared with a scheme that the thickness of the silencing cover is increased or a plurality of silencing covers are arranged to improve the silencing effect, the scheme provided by the embodiment of the invention can avoid the increase of cost, and meanwhile, noise in a specific frequency band can be eliminated through the position and size adjustment of the connecting channel and the resonance chamber, so that a sound frequency band sensitive to human ears can be eliminated in a targeted manner, and the silencing effect is greatly improved.

As an alternative, in this embodiment, the protruding portion includes a first protruding portion 121 and a second protruding portion that are fixedly connected; the first protrusion 121 penetrates through the shaft hole 124; the first bulge 121, the outer peripheral surface of the bearing handle 21 and the end surface of the bearing flange 22 enclose to form a flow chamber a; the second boss comprises a connecting portion 122 and a boss body 123, the connecting portion 122 and the end face of the bearing flange 22 enclose to form a connecting channel B, the groove 24 corresponds to the boss body 123, and further preferably, the groove 24 has a shape matching the projection of the boss body 123 on the end face of the bearing flange 22, and encloses with the boss body 123 to form a resonance chamber C. Specifically, the first protrusion 121, the connecting portion 122 and the protrusion body 123 may be formed by stamping, which is simple and can effectively save the production and processing cost.

Further, the first protrusion 121 is disposed in the middle of the first silencing cover 1, and a shaft hole 124 is formed through the center thereof, the number of the second protrusions is at least 1, in this embodiment, 3, and the second protrusions are disposed outside the shaft hole 124 along the circumferential direction; the projection of the bulge body 123 on the end face of the bearing flange 22 is a polygon with a fillet R, wherein R is more than 0.1mm and less than 10 mm; further preferably, the projection of the boss 123 on the end face of the bearing flange 22 is waist-shaped and extends along the circumferential direction of the bearing flange 22, and this setting can expand the volume of the resonance chamber C as much as possible; the connecting passage B communicates with one end or a middle portion of the resonance chamber C, and it should be noted that the one end or the middle portion of the resonance chamber C is with respect to the circumferential extension direction of the bearing flange 22.

In the present embodiment, the projection area of the resonance chamber C on the end face of the bearing flange 22 is S1, the flow cross-sectional area of the connecting passage B is S2, the radial length of the connecting passage B is L, and the volume of the resonance chamber C is V1, where S1 is less than 2800mm²，S2＜30mm²L is less than 30 mm. Wherein each parameter relationship isThrough the parameter limitation, the optimized frequency band of the resonance chamber can be preferably adjusted to the sensitive frequency band of human ears, and the noise of the frequency band is optimized, so that the influence caused by the noise can be greatly reduced from the hearing feeling of a user.

In the present embodiment, the vertical protrusion height of the second protrusion is h1, the depth of the groove 24 is h2, h1 < 20mm, and h2 < 12mm, and as an alternative, in the present embodiment, the horizontal cross section of the protrusion body 123 is constant along the protrusion height direction, and the horizontal cross section of the groove 24 is constant along the depth direction, that is, in the present embodiment, the volume of the resonance chamber C is V1 — S1 × (h1+ h2), so as to help further enlarge the volume of the resonance chamber C, and further improve the sound attenuation effect. In other embodiments, the horizontal cross-sectional area of the protrusion body 123 may also decrease slightly as its protrusion height increases, with a draft of 2-10 for molding, and the horizontal cross-sectional area of the groove 24 may decrease slightly as its depth increases to facilitate processing.

Referring to fig. 7, fig. 7 is a schematic view of a pump body structure of a compressor according to embodiment 1 of the present invention, and as shown in the figure, the pump body of the compressor further includes a cylinder assembly 3, a piston 4, and a crankshaft 5, specifically, the bearing 2 includes a first bearing 25 and a second bearing 26, the first bearing 25 and the second bearing 26 are detachably fixed and enclose to form a working space, and the cylinder assembly 3 is disposed in the working space; the piston 4 is movably arranged in the cylinder component 3; the crankshaft 5 is movably inserted through the inner bore of the first bearing 25 and the inner bore of the second bearing 26, and drives the piston to reciprocate and perform a refrigerant compression operation.

As an alternative embodiment, in the present embodiment, the fixing portion of the first sound-deadening cap 1 is detachable from the bearing flange of the first bearing 25 and/or the second bearing 26 by the fixing screw 6. Specifically, a plurality of first fixing holes are formed through the fixing part 11 of the first silencing cover 1; a second fixing hole is formed in the position, corresponding to the first fixing hole, of the first bearing 25 or the second bearing 26 in a penetrating mode, a fixing screw hole is formed in the position, corresponding to the second fixing hole, of the air cylinder assembly, and a fixing screw 6 penetrates through the first fixing hole, the second fixing hole and the fixing screw hole in sequence. The mode of utilizing the set screw realizes that detachable is fixed, and fixed stability is good, and the dismouting is easy and simple to handle.

In addition, further, the silencing cover further comprises a second silencing cover (not shown), the second silencing cover is detachably sleeved on the outer side of the first silencing cover and encloses with the first silencing cover to form an outer silencing cavity, and the outer silencing cavity is communicated with the circulation cavity. The setting of double-deck amortization lid can further be to noise reduction, improves user's use and feels.

Example 2

Embodiment 2 of the present invention provides a compressor pump body, which is different from embodiment 1 in that: referring to fig. 8-9, fig. 8 is a schematic diagram of a first silencing cover structure according to embodiment 2 of the present invention, and fig. 9 is a schematic diagram of a top view of the first silencing cover structure according to embodiment 2 of the present invention, as shown in the figure, in this embodiment, the protrusion includes a first protrusion 121 and a second protrusion 126 that are independent of each other; the first lug boss 121 is located in the middle of the silencing cover 1, the center of the first lug boss 121 penetrates through the shaft hole 124, the first lug boss 121, the outer peripheral surface of the bearing handle 21 and the end surface of the bearing flange 22 enclose to form a circulation chamber a, and the second lug boss 126 and the end surface of the bearing flange 22 enclose to form a resonance chamber C; referring to fig. 10-11, fig. 10 is a schematic view of a bearing structure according to embodiment 2 of the present invention, fig. 11 is a schematic top view of the bearing structure according to embodiment 2 of the present invention, the groove 24 includes a strip-shaped connecting groove 241, and the strip-shaped connecting groove 241 and the fixing portion 11 of the first sound-deadening cap 1 surround to form a connecting channel B.

Because the cross-sectional flow area of the connecting channel B is relatively small, the first silencing cover 1 is directly processed into a bulge in a processing mode of stamping and the like, and the bulge is further surrounded with the end face of the bearing flange 22 to form the narrow channel, so that the requirement on the precision of stamping processing is high, and particularly, the connecting channel B, the flow chamber A and the resonance chamber C are easy to have processing defects at the connecting positions, and the product is poor or even scrapped; through improving recess 24 in this embodiment, set up bar connection groove 241 so that it encloses with the fixed part 11 of first amortization lid 1 and close and form the connecting channel, can avoid directly punching on first amortization lid 1 and form the processing degree of difficulty that the connecting channel caused and increase, cause the problem of processing failure easily.

Example 3

Embodiment 3 of the present invention provides a compressor pump body, which is different from embodiment 1 in that: referring to fig. 12, fig. 12 is a schematic structural view of a first silencing cover according to embodiment 3 of the present invention, and as shown in the drawing, in this embodiment, the protrusion includes a first protrusion 121 and a second protrusion 126 that are independent of each other; the first protrusion 121 is located in the middle of the sound attenuation cover 1, a shaft hole 124 is formed through the center of the first protrusion 121, and the first protrusion 121, the outer peripheral surface of the bearing handle 21 and the end surface of the bearing flange 22 enclose a circulation chamber a.

Referring to fig. 13 to 14, fig. 13 is a schematic diagram of a bearing structure according to embodiment 3 of the present invention, fig. 14 is a schematic diagram of a top view of the bearing structure according to embodiment 3 of the present invention, as shown in the drawing, the groove 24 includes a strip-shaped connecting groove 241 and a chamber groove 242, the strip-shaped connecting groove 241 and the fixing portion 11 of the first sound-deadening cap 1 enclose to form a connecting channel B, the chamber groove 242 and the second protruding portion 126 correspond in position, the chamber groove 242, the end surface of the bearing flange 22 and the second protruding portion 126 enclose to form a resonance chamber C, so as to enlarge the volume of the resonance chamber C, or, as an alternative implementation manner, in this embodiment, the chamber groove 242 has a shape matching the projection of the second protruding portion 126 on the end surface of the bearing flange 22, and alone encloses with the second protruding portion 126 to form a resonance chamber C, which can sufficiently enlarge the volume of the resonance chamber C.

In the present embodiment, as an alternative, in the present embodiment, the projection of the second protruding portion 126 on the end face of the bearing flange 22 is a polygon with rounded corners R, where 0.1mm < R < 10 mm; further preferably, the projection of the second projection 126 on the end surface of the bearing flange 22 is waist-shaped and extends in the circumferential direction of the bearing flange 22, and this setting can expand the volume of the resonance chamber C as much as possible.

The performance test of the silencing cover in embodiment 3 of the present invention is performed, the silencing cover in embodiment 3 and the silencing cover produced in mass production in the prior art are assembled with other components to form a compressor, and when the rotation speed of the compressor is 75Hz (4500R/min), the refrigerant is R134a (1, 1, 1, 2-tetrafluoroethane), and the working conditions are as shown in the following table:

referring to fig. 15, as shown in fig. 15, the noise measured by the compressor correspondingly assembled with the first muffling cover in embodiment 3 of the present invention is greatly quantized in the 800-.

Further comparing the noise transmission loss of the first silencing cover according to example 3 of the present invention and the noise transmission loss of the prior art silencing cover using a computer CAE, the test results in a corresponding frequency-TL curve as shown in fig. 16, wherein the larger the TL value, the better the noise reduction effect of the sound insulating member is represented. As can be seen from fig. 16, the TL values of the first muffling cover in embodiment 3 of the present invention are greatly higher than those of the muffling cover in the prior art in a larger range, and the improvement effect is obvious, especially for the sound frequency band sensitive to human ears, i.e., the sound frequency band of 1000-8000Hz, the first muffling cover in the embodiment of the present invention can effectively reduce noise and noise of the noise in the sound frequency band through the optimization and improvement of the structure, so as to reduce the noise influence and improve the use experience.

Example 4

Embodiment 4 of the present invention provides a compressor including the compressor pump body according to any one of embodiments 1 to 3.

When the compressor belongs to an upper exhaust machine, the number of the silencing covers for the compressor is 1, the silencing covers are fixed with the first bearing and serve as the upper silencing covers, silencing cover exhaust holes are formed in the silencing covers in a penetrating mode and communicated with the circulation chamber, and high-temperature and high-pressure gas compressed by a pump body of the compressor enters the circulation chamber through the bearing exhaust holes and is exhausted from the silencing cover exhaust holes; when the compressor belongs to an upper exhaust machine and a lower exhaust machine, the silencing cover for the compressor comprises a first silencing cover and a second silencing cover, the first silencing cover and the second silencing cover are detachably fixed with the first bearing and the second bearing respectively, at the moment, the first bearing and the second bearing are both provided with bearing exhaust holes, the first silencing cover is provided with silencing cover exhaust holes in a penetrating way, the second silencing cover is not required to be provided with silencing cover exhaust holes, through holes are formed in corresponding positions of the cylinder assembly and the first bearing, high-temperature and high-pressure gas compressed by the compressor pump body enters a circulation cavity between the second bearing and the second silencing cover through the bearing exhaust holes of the second bearing and is further discharged to the circulation cavity between the first bearing and the first silencing cover through the through holes correspondingly formed in the cylinder assembly and the first bearing in sequence, and the gas exhausted by the bearing exhaust hole of the first bearing is exhausted by the exhaust hole of the silencing cover of the first silencing cover. The above structural description is only for illustration, and does not limit the structure of the compressor according to the embodiment of the present invention, and the specific application structure is not limited to this example.

The compressor provided by the embodiment of the invention has the advantages of low noise and low production and processing cost by using the first silencing cover.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.