CN117189595A - Cylinder, pump body assembly, compressor and air conditioner thereof - Google Patents

Abstract

The application provides a cylinder, a pump body assembly, a compressor and an air conditioner thereof, wherein the cylinder comprises a cylinder body, a central through hole for accommodating a pump body roller is formed in the cylinder body, an air suction channel is also formed in the cylinder body, and a resonant cavity is also formed in the cylinder body and is in through connection with the air suction channel. The application can reduce the suction pulsation of the compressor, prevent the phenomenon that the radiation of the liquid separator connected to the suction channel generates noise caused by the suction pulsation, and simultaneously, because the temperature of the suction refrigerant is lower, the refrigerant with lower temperature enters the resonant cavity, the temperature field of the suction side of the compressor can be improved, the temperature of the cylinder wall of the corresponding area is reduced, the suction amount of the compressor in unit time is further improved, and the performance of the compressor is improved.

Description

Cylinder, pump body assembly, compressor and air conditioner thereof

Technical Field

The application belongs to the technical field of air conditioning, and particularly relates to an air cylinder, a pump body assembly, a compressor and an air conditioner thereof.

Background

Rotary compressors, scroll compressors and the like are widely used as air conditioner compression mechanisms because of the advantages of simple structure, small volume, excellent performance, high stability, few reciprocating parts and the like, but compressor noise is always a major difficult problem affecting the development and popularization of compressors.

The suction structure of the compressor is formed by sealing connection of a pump body suction port and a liquid distributor elbow, so that a refrigerant enters the pump body through the liquid distributor. However, due to the intermittence of the suction process of the compressor and the backflow of the refrigerant in the high-pressure cavity, larger pressure pulsation is generated in the low-pressure cavity and the liquid separator of the air cylinder. These pressure pulsations radiate noise through the knockout on the one hand, affecting the noise characteristics of the compressor; on the other hand, suction pressure pulsations increase the power consumption of the compressor and reduce the performance of the compressor.

Disclosure of Invention

Therefore, the application provides a cylinder, a pump body assembly, a compressor and an air conditioner thereof, which can solve the technical problems that noise is radiated by a liquid separator and the performance of the compressor is reduced due to pressure pulsation of a refrigerant at an air suction port in the prior art.

In order to solve the problems, the application provides a cylinder which is applied to a compressor pump body assembly and comprises a cylinder body, wherein a central through hole for accommodating a pump body roller is formed in the cylinder body, an air suction channel is also formed in the cylinder body, and a resonant cavity is also formed in the cylinder body and is in through connection with the air suction channel.

In some embodiments of the present application, in some embodiments,

the cylinder body is also provided with a connecting threaded hole which is penetrated along the axial direction of the cylinder body, and after the cylinder body is connected with the pump body flange or the pump body partition board through the connecting threaded hole, the connecting threaded hole is internally provided with a screw hole positioned at the head part of the cylinder screw, and the resonant cavity comprises the screw hole.

In some embodiments of the present application, in some embodiments,

the cylinder body is further provided with a hollow hole, the hollow hole is communicated with the screw hole, and the resonant cavity further comprises the hollow hole.

In some embodiments of the present application, in some embodiments,

the hollow holes penetrate through two ends of the cylinder body along the axial direction of the cylinder body; and/or the plurality of the hollow holes are connected in series.

In some embodiments of the present application, in some embodiments,

the multiple engraved holes are arranged at intervals along the circumferential direction of the cylinder body, and two adjacent engraved holes are communicated with each other through the screw hole between the two engraved holes.

In some embodiments of the present application, in some embodiments,

the cylinder body is further provided with a first communication channel, the first communication channel extends along a straight line, a screw hole at the connecting threaded hole closest to the air suction channel is communicated with the air suction channel through an inner section of the first communication channel, the air suction channel is communicated with the hollow hole closest to the air suction channel through an intermediate section of the first communication channel, a sealing piece is connected in an outer section of the first communication channel in a sealing mode, and the resonant cavity further comprises the intermediate section.

In some embodiments of the present application, in some embodiments,

the hollow hole and the first communication channel are both configured on the cylinder body at one side of the suction channel away from the pump body sliding sheet.

In some embodiments of the present application, in some embodiments,

the cavity volume of the resonant cavity is Vg, and the cylinder volume of the cylinder body is Vq, and Vg/Vq is less than 0.2.

The application further provides a pump body assembly comprising the cylinder.

The application also provides a compressor, which comprises the pump body assembly, wherein the pump body assembly is the pump body assembly.

The application also provides an air conditioner comprising the compressor.

The cylinder, the pump body assembly, the compressor and the air conditioner thereof provided by the application have the following beneficial effects:

the suction pulsation of the compressor can be reduced by arranging the suction channel nearby the resonant cavity which is communicated with the suction channel, the phenomenon that noise is generated by radiation of the liquid distributor connected to the suction channel due to the suction pulsation is avoided, meanwhile, the temperature of the suction refrigerant is lower, the refrigerant with lower temperature enters the resonant cavity, the temperature field of the suction side of the compressor can be improved, the temperature of the cylinder wall of a corresponding area is reduced, the suction capacity of the compressor in unit time is further improved, and the performance of the compressor is improved;

the existing structure of the connecting threaded hole is used as a component part of the resonant cavity, so that space occupation of the solid structure of the cylinder body can be saved, the whole structure of the cylinder body is more compact, and simultaneously, the screw hole is fully used as the resonant cavity to attenuate and buffer air suction pulsation; the threaded hole is used as a part of the resonant cavity, the bolt connection length of the corresponding cylinder bolt can be changed to adjust the volume of the bolt hole, so that the adaptive attenuation of pressure pulsation with different frequencies is facilitated, and the structural design is more novel;

the plurality of hollow holes are communicated, the air flow entering the plurality of hollow holes with smaller volume can be subjected to resonance noise reduction for a plurality of times, a multi-stage noise reduction effect is formed, the noise reduction effect is further improved, meanwhile, the volume of each hollow hole can be designed to be relatively smaller through the design of the plurality of hollow holes, and therefore compared with the mode of one large-volume hollow hole, the position on the cylinder body can be set more flexibly;

the screw holes at the positions between the two adjacent hollow holes are used as a part of the communication channels of the two adjacent hollow holes, so that the volume variability of the resonant cavity is further improved, for example, the volume of the screw holes can be adjusted by screwing cylinder screws with different screw thread lengths in connection threaded holes at different positions, and therefore the noise reduction effect of the resonant cavity is better for different pulsation frequencies.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the application, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present application, should fall within the ambit of the technical disclosure.

FIG. 1 is a schematic view (cross section) of a cylinder according to a first embodiment of the present application after application in a pump body assembly;

FIG. 2 is a schematic view (cross section) of a cylinder according to a second embodiment of the present application after application in a pump body assembly;

FIG. 3 is a schematic view (cross-section) of a cylinder according to a third embodiment of the present application after application in a pump body assembly;

FIG. 4 is a schematic view (axial cross section) of a cylinder according to a third embodiment of the present application after application in a pump body assembly;

fig. 5 is a schematic view illustrating an internal structure of a compressor according to an embodiment of the present application;

FIG. 6 is a cross-sectional view of A-A of FIG. 5;

fig. 7 is a schematic diagram of the principle of resonant cavity damping.

The reference numerals are expressed as:

1. a cylinder body;

11. an air suction passage; 12. a connecting threaded hole; 121. screw apertures; 13. routing holes; 141. a first communication passage; 1411. an inner section; 1412. an intermediate section; 142. a second communication passage;

20. a pump body roller; 21. a pump body flange; 22. a cylinder screw; 23. a pump body sliding vane; 24. a crankshaft;

3. a seal;

40. a compressor housing; 41. a motor assembly; 42. a knockout; 43. and a pump body assembly.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.

Referring to fig. 1 and 6 in combination, according to an embodiment of the present application, a cylinder is provided, and is applied to a pump body assembly of a compressor, and includes a cylinder body 1, a central through hole (not labeled in the drawing) for accommodating a pump body roller 20 is configured on the cylinder body 1, an air suction channel 11 is also configured on the cylinder body 1, and a resonant cavity (not labeled in the drawing) corresponding to the air suction channel 11 is also configured on the cylinder body 1, and the resonant cavity is connected with the air suction channel 11 in a penetrating manner, where the resonant cavity may be directly connected with the air suction channel or indirectly connected with the air suction channel, for example, but it can be understood that when the air suction channel and the air suction channel are indirectly connected with each other, the distance between the air suction channel and the air suction channel is smaller, that is, the two are adjacently arranged.

In this technical scheme, through set up in its resonant cavity who link up in near the passageway 11 that breathes in, can reduce the pulsation of breathing in of compressor, stop the phenomenon emergence of the knockout radiation production noise that is connected in the passageway department of breathing in because the pulsation of breathing in leads to, simultaneously, because the temperature of breathing in the refrigerant is lower, this part refrigerant that temperature is lower gets into in the resonant cavity and can also improve the compressor side temperature field of breathing in, reduces the cylinder wall temperature in corresponding region, and then has improved the air intake volume in the compressor unit time, promotes the performance of compressor.

First embodiment:

as shown in fig. 1, the cylinder body 1 is further provided with a connecting threaded hole 12 penetrating along the axial direction, after the cylinder body 1 is connected with the pump body flange 21 or the pump body partition board through the connecting threaded hole 12, the connecting threaded hole 12 is internally provided with a screw hole 121 positioned at the head of the cylinder screw 22, and as shown in fig. 4, the upper and lower opposite cylinder screws 22 respectively connect the pump body flange 21 at the two end faces of the cylinder body 1 to the cylinder body 1, the heads of the two cylinder screws 22 are not in butt joint, but form the screw hole 121, and at this time, the resonant cavity comprises the screw hole 121.

In this technical scheme, utilize the current structure of connecting screw hole 12 as a component part of resonant cavity, can save the space occupation to the entity structure of cylinder body 1, when the overall structure of cylinder body 1 is compacter, make full use of screw hole 121 as the resonant cavity carries out the attenuation to the pulsation of breathing in, buffering. More importantly, in the technical scheme, the screw hole 121 is used as a part of the resonant cavity, the volume of the screw hole 121 can be adjusted by changing the bolting length of the corresponding cylinder screw 22, so that the adaptive attenuation of pressure pulsation with different frequencies is facilitated, and the structural design is more novel.

Second embodiment:

referring specifically to fig. 2, another possible implementation manner of the present application is shown, specifically, on the basis of the technical solution described in the first embodiment, the cylinder body 1 is further configured with a hole 13, the hole 13 is in communication with the screw hole 121, and the resonant cavity further includes the hole 13, that is, the resonant cavity includes the hole 13 structure herein in addition to the screw hole 121.

In this technical scheme, the resonant cavity of structure on the cylinder body 1 comprises the aforesaid screw hole 121 and here fretwork hole 13 jointly, can further promote the effective buffer volume of resonant cavity, promote the cushioning effect to the pressure pulsation of breathing in, simultaneously, still can make the side of breathing in at the cylinder body 1 form the cavity adiabatic effect through the setting of this fretwork hole 13 structure, reduce the influence of outside high Wen Youchi heat conduction to breathing in, make the compressor be in adiabatic compression state as far as possible, this performance that is favorable to further promoting the compressor.

As a preferred embodiment, the hollow holes 13 penetrate through two ends of the cylinder body 1 along the axial direction of the cylinder body 1, and the hollow holes 13 penetrating through two ends of the cylinder body 1 along the axial direction can increase the heat insulation surface on one hand, and facilitate the processing and manufacturing of the hollow holes 13 on the other hand.

It can be appreciated that the hollow-out bore 13 at this time forms a sealed cavity by sealing of pump body flanges 21 connected at both ends of the cylinder body 1.

The shape of the aforementioned hollow hole 13 may be flexibly designed according to the characteristics of the specific area such as the connecting part on the cylinder body 1, and in a preferred embodiment, the shape of the aforementioned hollow hole 13 projected along the axial direction is in a circular arc shape adapted to the outer circumferential wall of the cylinder body 1.

Third embodiment:

referring specifically to fig. 3, on the basis of the technical solution disclosed in the second embodiment, the foregoing hollow holes 13 are further provided in a plurality, and a plurality of the hollow holes 13 are connected in series, that is, two adjacent hollow holes 13 are communicated with each other.

In this technical scheme, set up the fretwork hole 13 of a plurality of fretwork hole 13 intercommunication, can make an uproar to the air current that gets into it through the less fretwork hole 13 of a plurality of volumes and fall, form multistage noise reduction, further promote noise reduction effect, simultaneously, the design of a plurality of fretwork holes 13 can be with the volume of every fretwork hole 13 all designed relatively less, like this compare with the mode of a big volumetric fretwork hole 13, set up the position on cylinder body 1 can be more nimble.

Referring further to fig. 3, a plurality of the hollow holes 13 are disposed at intervals along the circumferential direction of the cylinder body 1, and two adjacent hollow holes 13 are communicated with each other via the screw hole 121 therebetween. Referring specifically to fig. 4, a second communication channel 142 is further disposed between two adjacent hollow holes 13 and the screw hole 121 therebetween.

It can be understood that a plurality of connecting threaded holes 12 are arranged at intervals in the circumferential direction of the cylinder body 1, in the technical scheme, the screw hole 121 at the position between two adjacent hollow holes 13 is used as a part of the communication channel of the two adjacent hollow holes 13, so that the volume variability of the resonant cavity is further improved, for example, the volume of the different screw holes 121 can be adjusted by screwing the cylinder screws 22 with different screw thread lengths in the connecting threaded holes 12 at different positions, and therefore, the noise reduction effect of the resonant cavity is better for different pulsation frequencies.

Referring to fig. 1 to 3, the cylinder body 1 is further configured with a first communication channel 141, where the first communication channel 141 extends along a straight line, so that the first communication channel 141 can be machined on the basis of the cylinder body 1 in a machining manner, which is simple and convenient, referring specifically to fig. 6, a screw hole 121 at a position closest to the suction channel 11 at the position of the connecting threaded hole 12 is communicated with the suction channel 11 via an inner section 1411 of the first communication channel 141, a screw hole 121 at a position closest to the suction channel 11 at the position of the connecting threaded hole 12 at the position of the connecting threaded hole is communicated with the position closest to the suction channel 11 via an intermediate section 1412 of the first communication channel 141 at the position of the connecting threaded hole 13 at the position of the suction channel 11 at the position of the nearest to the suction channel, and a sealing member 3 is hermetically connected in an outer section (not indicated in the drawing) of the first communication channel 141, and the resonant cavity further includes the intermediate section 1412, and the inner section 1412, the intermediate section 1412 and the outer section are sequentially and continuously arranged along the length direction of the first communication channel 141.

In this embodiment, the inner section 1411 is used as an inlet of the resonant cavity of the present application, the middle section 1412 is used as a part of the resonant cavity, and the outer section is connected with a sealing member 3, and the sealing member 3 is, for example, a threaded pin or an interference fit pin, so as to seal the outer section. In this technical scheme, the air suction channel 11, the screw hole 121 and the engraved hole 13 are communicated through the first communication channel 141, and the processing technology is simple and convenient because the first communication channel 141 is of a straight line extending structure.

In a preferred embodiment, the hollow hole 13 and the first communication channel 141 are both configured on the cylinder body 1 on the side of the suction channel 11 away from the pump body slide 23.

That is, in this technical solution, the resonant cavity is disposed in a region of the cylinder body 1 on a side far away from the pump body slide sheet 23, and the region has a larger operable area, which is beneficial to processing of each component of the resonant cavity.

In order to reduce adverse effects on compressor performance due to excessive clearance volume as much as possible while ensuring noise reduction effect, the cavity volume of the resonant cavity is Vg, and the cylinder volume of the cylinder body 1 is Vq, vg/Vq <0.2.

The damping and noise reduction principle of the resonant cavity in the technical scheme can be described with reference to fig. 7 and in combination with an embodiment as follows:

the cylinder body 1 is provided with a resonant cavity air passage (namely the first communication channel 141), a cylinder screw cavity formed by a cylinder screw (namely the screw hole 121) is communicated with the cylinder air suction channel 11, the sealing element 3 is arranged at the tail end of the first communication channel 141, noise is at a lower frequency (the wavelength is far greater than that of the cavity formed by the first communication channel 141, the cylinder screw cavity and the sealing element), all parts of air in the channel belong to a small area in the wavelength lambda, the vibration condition can be considered to be the same, the cylinder screw cavity and the gas in the adjacent channel integrally move like a piston, certain sound quality is achieved, and when the gas vibrates in the cavity, friction and damping effects exist on the wall surface, and certain acoustic resistance are achieved. The wall surface may be considered rigid, and the closed cavity, i.e. the gas other than the cavity airway (inner section 1411 of first communication channel 141), may be a gas spring with a certain acoustic compliance. The position that sound wave incident to resonant cavity air vent makes a portion sound wave reflection return because impedance mismatch for a portion sound energy can't continue to propagate forward, on the other hand, friction, the damping effect of cylinder cavity turn into heat energy dissipation with a portion sound energy again, reaches the effect of noise elimination. Resonance frequency:

wherein: acoustic massSound volume->

The total volume of the resonant cavity is V _b，

The length of the air passage is L,

the cross-sectional area S of the airway,

c is the speed of sound.

The silencing frequency can be controlled by designing the diameter of the resonant cavity airway, the cavity volume between screw holes, the outer side aperture of the screw hole cavity and the installation of a sealing element.

According to an embodiment of the application, there is also provided a pump body assembly including the cylinder described above. Specifically, referring to fig. 4, the cylinder includes the cylinder body 1, the cylinder body 1 is detachably connected with the pump body flanges 21 (when the cylinder body is a multi-cylinder pump body assembly, one of the pump body flanges 21 may be a partition plate, two pump body flanges 21 may be partition plates are disposed), the central through hole of the cylinder body 1 is provided with the pump body roller 20, the pump body roller 20 is sleeved on the crankshaft 24, the cylinder body 1 is further configured with a sliding vane groove in which the pump body sliding vane 23 is slidingly connected, the head of the pump body sliding vane 23 abuts against the outer circumferential wall of the pump body roller 20, the cylinder cavity formed between the pump body roller 20 and the central through hole wall of the cylinder body 1 is divided into a suction cavity and a compression cavity which are relatively independent from each other, the suction channel 11 (corresponding to the suction port) is communicated with the suction cavity, the exhaust channel (corresponding to the exhaust port) is controllably communicated with the compression cavity, and when the crankshaft 24 rotates, the pump body roller 20 is eccentrically compressed to the suction channel 11, and finally the compressor is discharged by the exhaust channel.

Due to the adoption of the cylinder, the suction pulsation of the compressor can be reduced by arranging the cylinder near the suction channel 11 in the resonant cavity which is in through connection with the cylinder, the phenomenon that noise is generated by radiation of the liquid separator connected to the suction channel due to the suction pulsation is avoided, meanwhile, due to the fact that the temperature of the suction refrigerant is low, the refrigerant with low temperature enters the resonant cavity, the temperature field of the suction side of the compressor can be improved, the temperature of the cylinder wall of a corresponding area is reduced, the suction amount of the compressor in unit time is further improved, and the performance of the compressor is improved.

According to an embodiment of the present application, there is further provided a compressor including a pump body assembly 43, the pump body assembly 43 is the pump body assembly described above, and particularly referring to fig. 5 and 6, the compressor further includes a motor assembly 41 for driving the pump body assembly 43 to operate, both the motor assembly 41 and the pump body assembly 43 are reliably assembled in the compressor housing 40, and the compressor further includes a liquid separator 42 for separating gas and liquid from refrigerant suction, and the liquid separator 42 is connected to the suction port of the suction channel 11 of the pump body assembly.

The pump body assembly 43 also adopts the cylinder, and by arranging the cylinder near the suction channel 11 in the resonant cavity which is in through connection with the cylinder, suction pulsation of the compressor can be reduced, the phenomenon that noise is generated by radiation of the liquid separator connected to the suction channel due to suction pulsation is avoided, meanwhile, the temperature of the suction refrigerant is lower, the refrigerant with lower temperature enters the resonant cavity, the temperature field of the suction side of the compressor can be improved, the temperature of the cylinder wall of the corresponding area is reduced, the suction amount of the compressor in unit time is further improved, and the performance of the compressor is improved.

According to an embodiment of the present application, there is also provided an air conditioner including the above compressor.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application. The foregoing is merely a preferred embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the application.

Claims (11)

1. The cylinder is applied to a compressor pump body assembly and comprises a cylinder body (1), wherein a central through hole for accommodating a pump body roller (20) is formed in the cylinder body (1), an air suction channel (11) is also formed in the cylinder body (1),

a resonant cavity is further formed in the cylinder body (1), and the resonant cavity is in through connection with the air suction channel (11).

2. The cylinder according to claim 1, wherein,

the cylinder body (1) is further provided with a connecting threaded hole (12) which penetrates through the cylinder body along the axial direction, after the cylinder body (1) is connected with the pump body flange (21) or the pump body partition board through the connecting threaded hole (12), a screw hole (121) positioned at the head of a cylinder screw (22) is formed in the connecting threaded hole (12), and the resonant cavity comprises the screw hole (121).

3. A cylinder according to claim 2, wherein,

the cylinder body (1) is further provided with a hollow hole (13), the hollow hole (13) is communicated with the screw hole (121), and the resonant cavity further comprises the hollow hole (13).

4. A cylinder according to claim 3, wherein,

the hollow holes (13) penetrate through two ends of the cylinder body (1) along the axial direction of the cylinder body; and/or the plurality of the hollow holes (13) are arranged in series, and the plurality of the hollow holes (13) are connected in series.

5. The cylinder as claimed in claim 4, wherein,

a plurality of engraved holes (13) are arranged at intervals along the circumferential direction of the cylinder body (1), and two adjacent engraved holes (13) are communicated through the screw hole (121) between the engraved holes.

6. A cylinder according to claim 3, wherein,

the cylinder body (1) is further provided with a first communication channel (141), the first communication channel (141) extends along a straight line, a screw hole (121) at the position of the connecting threaded hole (12) closest to the air suction channel (11) is communicated with the air suction channel (11) through an inner section (1411) of the first communication channel (141), is communicated with the hollow hole (13) closest to the air suction channel (11) through an intermediate section (1412) of the first communication channel (141), and a sealing piece (3) is connected in an outer section of the first communication channel (141) in a sealing way, and the resonant cavity further comprises the intermediate section (1412).

7. The cylinder as claimed in claim 6, wherein,

the hollow hole (13) and the first communication channel (141) are both configured on the cylinder body (1) at one side of the suction channel (11) far away from the pump body sliding sheet (23).

8. The cylinder according to claim 1, wherein,

the volume of the cavity of the resonant cavity is Vg, and the volume of the cylinder body (1) is Vq, and Vg/Vq is less than 0.2.

9. A pump body assembly comprising a cylinder as claimed in any one of claims 1 to 8.

10. Compressor comprising a pump body assembly (43), characterized in that the pump body assembly (43) is a pump body assembly according to claim 9.

11. An air conditioner comprising the compressor of claim 10.