Cylinder, pump body assembly, compressor and air conditioner thereof

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 arranged on the cylinder body, an air suction channel is further arranged on the cylinder body, a resonance cavity is further arranged on the cylinder body, and the resonance cavity is connected with the air suction channel in a through manner. The application can reduce the air suction pulsation of the compressor, eliminate the phenomenon that the noise of the radiator of the distributor connected with the air suction channel is generated due to the air suction pulsation, and since the temperature of the air suction refrigerant is low, the part of the low-temperature refrigerant entering the resonance cavity can improve the temperature field of the air suction side of the compressor, reduce the cylinder wall temperature of the corresponding area, and further improve the air suction amount of the compressor per unit time and the performance of the compressor.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a cylinder, a pump assembly, a compressor, and an air conditioner thereof. Background Technology

[0002] Rotary compressors and scroll compressors are widely used as air conditioning compressors due to their advantages such as simple structure, small size, excellent performance, high stability, and few reciprocating moving parts. However, compressor noise has always been a major problem affecting the development and promotion of compressors.

[0003] The compressor's suction structure is formed by a sealed connection between the pump body's suction port and the distributor's bend, allowing refrigerant to enter the pump body through the distributor. However, due to the intermittent nature of the compressor's suction process and the refrigerant backflow in the high-pressure chamber, significant pressure pulsations occur in the cylinder's low-pressure chamber and the distributor. These pressure pulsations radiate noise through the distributor, affecting the compressor's noise characteristics; furthermore, the suction pressure pulsations increase the compressor's power consumption, reducing its performance. Summary of the Invention

[0004] Therefore, the present invention provides a cylinder, a pump body assembly, a compressor and an air conditioner thereof, which can solve the technical problems in the prior art where the compressor radiates noise through the distributor and the compressor performance degrades due to refrigerant pressure pulsation at the air intake.

[0005] To address the aforementioned problems, the present invention provides a cylinder for use in a compressor pump assembly, comprising a cylinder body, wherein the cylinder body has a central through hole for accommodating pump body rollers, the cylinder body also has an intake channel, and the cylinder body also has a resonant cavity, the resonant cavity being connected to the intake channel.

[0006] In some implementations...

[0007] The cylinder body is also provided with a connecting threaded hole that runs through it along its axial direction. After the cylinder body is connected to the pump body flange or pump body partition through the connecting threaded hole, the connecting threaded hole has a screw hole at the head of the cylinder screw, and the resonant cavity includes the screw hole.

[0008] In some implementations...

[0009] The cylinder body is also constructed with a perforation, which is connected to the screw hole, and the resonant cavity also includes the perforation.

[0010] In some implementations...

[0011] The perforation extends through both ends of the cylinder body along its axial direction; and / or, there are multiple perforations, and the multiple perforations are connected in series.

[0012] In some implementations...

[0013] The plurality of said perforations are arranged at circumferential intervals along the cylinder body, and two adjacent said perforations are connected via the screw hole located between them.

[0014] In some implementations...

[0015] The cylinder body is also provided with a first connecting channel. The first connecting channel extends in a straight line. The screw hole at the connecting threaded hole closest to the intake channel is connected to the intake channel via the inner section of the first connecting channel. The screw hole is connected to the perforation closest to the intake channel via the middle section of the first connecting channel. A sealing element is sealed in the outer section of the first connecting channel. The resonant cavity also includes the middle section.

[0016] In some implementations...

[0017] The perforation and the first connecting channel are both constructed on the cylinder body on the side of the air intake channel away from the pump body vane.

[0018] In some implementations...

[0019] The cavity volume of the resonant cavity is Vg, and the cylinder volume of the cylinder body is Vq, where Vg / Vq < 0.2.

[0020] The present invention also provides a pump body assembly, including the cylinder described above.

[0021] The present invention also provides a compressor, including a pump body assembly, wherein the pump body assembly is the pump body assembly described above.

[0022] The present invention also provides an air conditioner, including the compressor described above.

[0023] The present invention provides a cylinder, a pump assembly, a compressor, and an air conditioner thereof, which have the following beneficial effects:

[0024] By setting a resonant cavity that runs through the intake channel, the intake pulsation of the compressor can be reduced, and the noise generated by the distributor connected to the intake channel due to intake pulsation can be eliminated. At the same time, since the temperature of the intake refrigerant is low, the low-temperature refrigerant entering the resonant cavity can also improve the temperature field on the intake side of the compressor, reduce the cylinder wall temperature in the corresponding area, thereby increasing the intake volume of the compressor per unit time and improving the performance of the compressor.

[0025] By utilizing the existing structure of the connecting threaded hole as a component of the resonant cavity, the space occupied by the solid structure of the cylinder body can be saved, making the overall structure of the cylinder body more compact. At the same time, the screw hole is fully utilized as a resonant cavity to attenuate and buffer the intake pulsation. By using the threaded hole as part of the resonant cavity, the volume of the screw hole can be adjusted by changing the bolting length of the corresponding cylinder screw, which is conducive to adaptive attenuation of pressure pulsation at different frequencies. The structural design is more novel.

[0026] By setting multiple interconnected perforations, the airflow entering the cylinder can undergo multiple resonance noise reductions through multiple smaller perforations, forming multi-level noise reduction and further improving the noise reduction effect. At the same time, the design of multiple perforations allows each perforation to be designed to have a relatively small volume, which makes the placement on the cylinder body more flexible compared to the method of using a large volume perforation.

[0027] By using the screw hole located between two adjacent holes as part of the connecting channel between the two adjacent holes, the volume variability of the resonant cavity is further improved. For example, the volume of different screw holes can be adjusted by screwing cylinder screws of different thread lengths into the connecting threaded holes at different positions, thereby making the noise reduction of the resonant cavity of the present invention more effective for different pulsation frequencies. Attached Figure Description

[0028] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0029] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0030] Figure 1 This is a structural schematic diagram (cross-section) of the cylinder of the first embodiment of the present invention after it is applied in the pump body assembly;

[0031] Figure 2 This is a schematic diagram (cross-section) of the structure of the cylinder after it is applied to the pump body assembly according to the second embodiment of the present invention;

[0032] Figure 3 This is a structural schematic diagram (cross-section) of the cylinder after it is applied to the pump body assembly according to the third embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram (axial section) of the structure of the cylinder after it is applied to the pump body assembly according to the third embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the internal structure of the compressor according to an embodiment of the present invention;

[0035] Figure 6 for Figure 5 Cross-sectional view of AA in the middle;

[0036] Figure 7 This is a schematic diagram of the vibration reduction principle of the resonant cavity.

[0037] The reference numerals in the attached figures are as follows:

[0038] 1. Cylinder body;

[0039] 11. Intake channel; 12. Connecting threaded hole; 121. Screw hole; 13. Hole; 141. First connecting channel; 1411. Inner section; 1412. Middle section; 142. Second connecting channel;

[0040] 20. Pump body rollers; 21. Pump body flange; 22. Cylinder bolts; 23. Pump body vanes; 24. Crankshaft;

[0041] 3. Sealing components;

[0042] 40. Compressor housing; 41. Motor assembly; 42. Dispenser; 43. Pump body assembly. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0046] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0047] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0048] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0049] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0050] See also Figure 1 and Figure 6 As shown, according to an embodiment of the present invention, a cylinder is provided for use in a compressor pump assembly, including a cylinder body 1. The cylinder body 1 has a central through hole (not labeled in the figure) for accommodating a pump body roller 20. The cylinder body 1 also has a suction channel 11. Corresponding to the suction channel 11, the cylinder body 1 also has a resonant cavity (not labeled in the figure). The resonant cavity is connected to the suction channel 11. This connection can be, for example, a direct connection between the two or an indirect connection between the two. However, it is understood that when the two are indirectly connected, the distance between them is small, that is, they are arranged adjacent to each other.

[0051] In this technical solution, by setting a resonant cavity connected to the intake channel 11, the intake pulsation of the compressor can be reduced, and the noise generated by the distributor connected to the intake channel due to intake pulsation can be eliminated. At the same time, since the temperature of the intake refrigerant is low, the low-temperature refrigerant entering the resonant cavity can also improve the temperature field on the intake side of the compressor, reduce the cylinder wall temperature in the corresponding area, thereby increasing the intake volume of the compressor per unit time and improving the performance of the compressor.

[0052] First embodiment:

[0053] For details, please refer to Figure 1As shown, the cylinder body 1 also has a connecting threaded hole 12 extending along its axial direction. After the cylinder body 1 is connected to the pump body flange 21 or the pump body partition through the connecting threaded hole 12, the connecting threaded hole 12 has a screw hole 121 located at the head of the cylinder screw 22. For details, please refer to [reference needed]. Figure 4 As shown, two opposing cylinder screws 22 connect the pump body flanges 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 mated together, but form the aforementioned screw hole 121. At this time, the resonant cavity includes the screw hole 121.

[0054] In this technical solution, the existing structure of the connecting threaded hole 12 is used as a component of the resonant cavity, which saves space occupied by the solid structure of the cylinder body 1. The overall structure of the cylinder body 1 is more compact, while making full use of the screw hole 121 as a resonant cavity to attenuate and buffer the intake pulsation. More importantly, in this technical solution, by using the screw hole 121 as 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, thereby facilitating the adaptive attenuation of pressure pulsations at different frequencies. The structural design is more novel.

[0055] Second embodiment:

[0056] See details Figure 2 As shown, it illustrates another feasible implementation of the present invention. Specifically, based on the technical solution described in the first embodiment, the cylinder body 1 is further provided with a perforation 13, which communicates with the screw hole 121. The resonant cavity also includes the perforation 13. That is, in addition to the aforementioned screw hole 121, the resonant cavity also includes the perforation 13 structure here.

[0057] In this technical solution, the resonant cavity constructed on the cylinder body 1 is jointly formed by the aforementioned screw hole 121 and the perforation 13 here, which can further increase the effective buffer volume of the resonant cavity and improve the buffering effect on the suction pressure pulsation. At the same time, the perforation 13 structure can also form a hollow insulation effect on the suction side of the cylinder body 1, reduce the influence of heat conduction from the external high-temperature oil pool on the suction, and keep the compressor in an adiabatic compression state as much as possible, which is conducive to further improving the performance of the compressor.

[0058] In a preferred embodiment, the perforation 13 extends through both ends of the cylinder body 1 along its axial direction. By extending the perforation 13 through both ends of the cylinder body 1, the heat insulation surface can be increased on the one hand, and the processing and manufacturing of the perforation 13 is also facilitated on the other hand.

[0059] It is understandable that at this time, the perforation 13 forms a sealed cavity through the seal of the pump body flange 21 connected to both ends of the cylinder body 1.

[0060] The aforementioned perforation 13 can be flexibly designed in shape according to the characteristics of the connecting parts and other areas on the specific cylinder body 1. In a preferred embodiment, the shape of the aforementioned perforation 13 projected along the axial direction is an arc shape that matches the outer circumferential wall of the cylinder body 1.

[0061] Third embodiment:

[0062] See details Figure 3 As shown, based on the technical solution disclosed in the second embodiment, the aforementioned perforation 13 is further configured as multiple perforations 13, and the multiple perforations 13 are connected in series, that is, two adjacent perforations 13 are connected.

[0063] In this technical solution, multiple interconnected perforations 13 are provided. The airflow entering the perforation can be resonated and noise reduced multiple times through multiple small-volume perforations 13, forming multi-level noise reduction and further improving the noise reduction effect. At the same time, the design of multiple perforations 13 allows each perforation 13 to be designed to have a relatively small volume. Compared with the method of using a large-volume perforation 13, the position of the perforation 13 on the cylinder body 1 can be set more flexibly.

[0064] For further details, please refer to [link / reference]. Figure 3 As shown, a plurality of the perforations 13 are spaced apart along the circumference of the cylinder body 1, and two adjacent perforations 13 are connected via the screw hole 121 located between them. See details. Figure 4 As shown, a second connecting channel 142 is provided between each of the two adjacent perforations 13 and the screw hole 121 located between them.

[0065] It is understood that multiple connecting threaded holes 12 are spaced apart on the circumference of the cylinder body 1. In this technical solution, the screw hole 121 located between two adjacent holes 13 is used as part of the connecting channel between the two adjacent holes 13, which further improves the variability of the resonant cavity volume. For example, the volume of different screw hole 121 can be adjusted by screwing cylinder screws 22 with different thread lengths into the connecting threaded holes 12 at different positions. This makes the noise reduction of the resonant cavity of the present invention more effective for different pulsation frequencies.

[0066] See also Figures 1 to 3 As shown, the cylinder body 1 also has a first connecting channel 141, which extends along a straight line. Thus, the first connecting channel 141 can be machined on the basis of the cylinder body 1, which is simple and convenient. See details... Figure 6 As shown, the screw hole 121 at the threaded hole 12 closest to the intake channel 11 is connected to the intake channel 11 via the inner section 1411 of the first connecting channel 141. The screw hole 121 at the threaded hole 12 closest to the intake channel 11 is connected to the perforation 13 closest to the intake channel 11 via the middle section 1412 of the first connecting channel 141. A sealing element 3 is sealed inside the outer section (not labeled in the figure) of the first connecting channel 141. The resonant cavity also includes the middle section 1412. The inner section 1411, the middle section 1412, and the outer section are arranged sequentially and continuously along the length direction of the first connecting channel 141.

[0067] In this technical solution, the inner section 1411 serves as the inlet of the resonant cavity of the present invention, while the middle section 1412 serves as part of the resonant cavity. A sealing element 3 is connected to the outer section; this sealing element 3 is, for example, a threaded pin or an interference-fit pin, to seal the outer section. In this technical solution, the intake channel 11, screw hole 121, and perforation 13 are connected through the first connecting channel 141. Since the first connecting channel 141 has a straight-line extension structure, the processing technology is simple and convenient.

[0068] In a preferred embodiment, the perforation 13 and the first connecting channel 141 are both constructed on the cylinder body 1 on the side of the intake channel 11 away from the pump body vane 23.

[0069] That is, in this technical solution, the resonant cavity is set on the side of the cylinder body 1 away from the pump body vane 23. This area has a large operable area, which is conducive to the processing of each component of the resonant cavity.

[0070] In order to ensure noise reduction while minimizing the adverse effects on compressor performance caused by excessive clearance volume, the cavity volume of the resonant cavity is Vg, the cylinder volume of the cylinder body 1 is Vq, and Vg / Vq<0.2.

[0071] The vibration reduction and noise reduction principle of the resonant cavity in this technical solution can be referenced. Figure 7 The following is an example illustrating the concept:

[0072] A resonant cavity ventilation channel (i.e., the first connecting channel 141 mentioned above) is provided in the cylinder body 1, connecting the cylinder screw cavity (i.e., the screw hole 121 mentioned above) formed by the cylinder screw to the cylinder intake channel 11. The seal 3 is installed at the end of the first connecting channel 141. The noise is at a low frequency (the wavelength is much larger than the cavity formed by the first connecting channel 141, the cylinder screw cavity, and the seal). The air in each part of the channel belongs to a very small region within the wavelength λ, and the vibration can be considered to be the same. The cylinder screw cavity and the gas in the adjacent channel move as a whole like a piston, and have a certain sound quality. When the gas vibrates in the cavity, there is friction and damping effect on the wall, which has a certain sound resistance. The wall can be considered rigid. The gas in the sealed cavity, except for the resonant cavity ventilation channel (the inner section 1411 of the first connecting channel 141), is like an air spring and has a certain sound compliance. When sound waves are incident on the resonant cavity's air passage, impedance mismatch causes some of the sound waves to be reflected back, preventing some sound energy from propagating further. On the other hand, the friction and damping effect of the cylinder cavity converts some sound energy into heat energy, achieving a noise reduction effect. Resonant frequency:

[0073]

[0074] Where: sound mass voice and appearance

[0075] The total volume of the resonant cavity is V b，

[0076] The length of the airway is L.

[0077] The cross-sectional area S of the ventilation duct,

[0078] c represents the speed of sound.

[0079] The silencing frequency can be controlled by designing the diameter of the resonant cavity vent, the volume of the cavity between screw holes, the outer diameter of the screw hole cavity, and the installation of the seals.

[0080] According to an embodiment of the present invention, a pump body assembly is also provided, including the cylinder described above. Specifically, see [link to specific details]. Figure 4As shown, the cylinder includes the aforementioned cylinder body 1. Pump body flanges 21 are detachably connected to the upper and lower end faces of the cylinder body 1 via cylinder bolts 22. (When it is a multi-cylinder pump assembly, one of the pump body flanges 21 can be a partition; both pump body flanges 21 can be partitions). A pump body roller 20 is disposed in the central through hole of the cylinder body 1. The pump body roller 20 is fitted onto the crankshaft 24. A vane groove is also constructed on the cylinder body 1, in which a pump body vane 23 is slidably connected. The head of the pump body vane 23 abuts against the outer circumferential wall of the pump body roller 20, dividing the cylinder cavity formed between the pump body roller 20 and the central through hole wall of the cylinder body 1 into a relatively independent intake chamber and a compression chamber. The aforementioned intake channel 11 (corresponding to the intake port) is connected to the intake chamber, while the exhaust channel (corresponding to the exhaust port) is controllably connected to the compression chamber. When the crankshaft 24 rotates, the pump body roller 20 performs eccentric translation to compress the refrigerant drawn into the intake channel 11, and finally discharges it from the compressor through the exhaust channel.

[0081] Because of the aforementioned cylinder, by setting a resonant cavity that is connected to the intake channel 11, the intake pulsation of the compressor can be reduced, and the noise generated by the distributor connected to the intake channel due to intake pulsation can be eliminated. At the same time, since the temperature of the intake refrigerant is low, the low-temperature refrigerant entering the resonant cavity can also improve the temperature field on the intake side of the compressor, reduce the cylinder wall temperature in the corresponding area, thereby increasing the intake volume of the compressor per unit time and improving the performance of the compressor.

[0082] According to an embodiment of the present invention, a compressor is also provided, including a pump body assembly 43, wherein the pump body assembly 43 is the pump body assembly described above, see details below. Figure 5 and Figure 6 As shown, the compressor also includes a motor assembly 41 for driving the pump body assembly 43. Both the motor assembly 41 and the pump body assembly 43 are reliably assembled inside the compressor housing 40. The compressor also includes a distributor 42 for gas-liquid separation of refrigerant intake gas. The distributor 42 is connected to the intake port of the intake passage 11 of the pump body assembly.

[0083] The aforementioned pump body assembly 43 also uses the aforementioned cylinder. By setting a resonant cavity that is connected to the suction channel 11, the suction pulsation of the compressor can be reduced, and the phenomenon of noise generated by the distributor connected to the suction channel due to suction pulsation can be eliminated. At the same time, since the temperature of the suction refrigerant is low, the low-temperature refrigerant entering the resonant cavity can also improve the temperature field on the suction side of the compressor, reduce the cylinder wall temperature in the corresponding area, thereby increasing the suction volume of the compressor per unit time and improving the performance of the compressor.

[0084] According to an embodiment of the present invention, an air conditioner is also provided, including the compressor described above.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A cylinder used in a compressor pump assembly, comprising a cylinder body (1), wherein the cylinder body (1) has a central through hole for accommodating pump body rollers (20), and the cylinder body (1) further comprises an intake passage (11), characterized in that, The cylinder body (1) is also provided with a resonant cavity, which is connected to the intake channel (11). The cylinder body (1) is also provided with a connecting threaded hole (12) that runs through it along its axial direction. After the cylinder body (1) is connected to the pump body flange (21) or the pump body partition through the connecting threaded hole (12), the connecting threaded hole (12) has a screw hole (121) at the head of the cylinder screw (22). The resonant cavity includes the screw hole (121). The cylinder body (1) is also provided with a perforation (13), which is connected to the screw hole (121). The resonant cavity also includes the perforation (13). The perforation (13) creates a hollow heat insulation effect on the intake side of the cylinder body (1).

2. The cylinder according to claim 1, characterized in that, The perforation (13) extends through both ends of the cylinder body (1) along its axial direction; and / or, there are multiple perforations (13), and multiple perforations (13) are connected in series.

3. The cylinder according to claim 2, characterized in that, The plurality of the perforations (13) are arranged circumferentially along the cylinder body (1), and two adjacent perforations (13) are connected via the screw hole (121) located between them.

4. The cylinder according to claim 1, characterized in that, The cylinder body (1) is also provided with a first connecting channel (141). The first connecting channel (141) extends along a straight line. The screw hole (121) at the connecting threaded hole (12) closest to the intake channel (11) is connected to the intake channel (11) via the inner section (1411) of the first connecting channel (141). The middle section (1412) of the first connecting channel (141) is connected to the perforation (13) closest to the intake channel (11). A sealing element (3) is sealed in the outer section of the first connecting channel (141). The resonant cavity also includes the middle section (1412).

5. The cylinder according to claim 4, characterized in that, The perforation (13) and the first connecting channel (141) are both constructed on the cylinder body (1) on the side of the intake channel (11) away from the pump body slide (23).

6. The cylinder according to claim 1, characterized in that, The cavity volume of the resonant cavity is Vg, and the cylinder volume of the cylinder body (1) is Vq, where Vg / Vq<0.

2.

7. A pump body assembly, characterized in that, The cylinder includes any one of claims 1 to 6.

8. A compressor, comprising a pump body assembly (43), characterized in that, The pump assembly (43) is the pump assembly of claim 7.

9. An air conditioner, characterized in that, Includes the compressor as described in claim 8.

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