Pump body assembly and compressor

Abstract

The invention provides a pump body assembly and a compressor, the pump body assembly comprises a first flange and an air cylinder provided with an inner cavity, an exhaust structure is arranged between the first flange and the air cylinder, a plurality of air outlet holes are formed in the first flange, and the exhaust structure is configured to act under the action of the pressure difference of internal and external air in the inner cavity. Therefore, connection and disconnection between the air outlet hole and the inner cavity are controlled. According to the technical scheme, only the air outlet is formed in the flange, and the exhaust unit is arranged in other structures, so that compared with existing structures such as an exhaust valve seat arranged on the flange, the occupied area is greatly reduced, and the rigidity of the flange can be effectively guaranteed. And based on the advantages of small occupied area of the air outlet holes and low influence on the structural rigidity of the flange, the multiple air outlet holes can be formed in the flange, so that the air displacement is increased, the air exhaust resistance is reduced, the air exhaust efficiency is improved, the power consumption is reduced, and finally the energy efficiency of the compressor where the pump body assembly is located can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a pump body assembly and a compressor. Background Art

[0002] In rolling rotor compressors, an exhaust unit is usually installed on the flange of the pump assembly for exhaust. Since the exhaust valve seat area in the exhaust unit is large, it accounts for a large proportion of the flange plane, which will reduce the rigidity of the flange; at the same time, the exhaust hole area of ​​the exhaust unit is small, the exhaust resistance is large, which is not conducive to energy efficiency.

[0003] Therefore, in order to improve the energy efficiency of the rolling rotor compressor, it is necessary to optimize the design of the exhaust unit of the pump body assembly. Summary of the invention

[0004] In order to solve the problems that the exhaust unit area of ​​the existing pump body assembly accounts for a large proportion and affects the flange stiffness, and the exhaust unit has a small air outlet area and large exhaust resistance, the present invention proposes a pump body assembly and a compressor.

[0005] In a first aspect, the present invention proposes a pump body assembly, which includes a first flange and a cylinder with an inner cavity, an exhaust structure is arranged between the first flange and the cylinder, a plurality of air outlets are constructed on the first flange, and the exhaust structure is constructed to be able to operate under the action of the gas pressure difference between the inside and outside of the inner cavity to control the connection between the air outlet and the inner cavity.

[0006] In one embodiment, the exhaust structure includes a cover plate arranged between the first flange and the cylinder and an exhaust unit arranged on the cover plate, the exhaust unit corresponds to the air outlet, and the exhaust unit is configured to operate under the action of air pressure difference to control the connection between the air outlet and the inner cavity.

[0007] In one embodiment, the exhaust unit includes an exhaust duct and a slider disposed in the exhaust duct, a first end of the exhaust duct is connected to the inner cavity, and one end of the air outlet is connected to the exhaust duct;

[0008] Among them, the orifice at one end of the air outlet connected to the exhaust duct is located on the moving path of the slider in the exhaust duct, and the slider is constructed to be able to move in the exhaust duct under the action of the gas pressure difference between the inside and outside of the inner cavity to block the orifice or stagger with the orifice.

[0009] In one embodiment, an elastic member is provided between the slider and the second end of the exhaust passage, and the sum of the length of the elastic member in a free state and the width of the slider in the axial direction of the exhaust passage is not less than the length of the exhaust passage.

[0010] In one embodiment, the width of the slider in the axial direction and the radial direction of the exhaust passage is greater than the diameter of the orifice, so that the slider can completely block the orifice.

[0011] In one embodiment, the exhaust unit further includes an exhaust hole, the exhaust hole is configured to connect the inner cavity with the first end of the exhaust passage, and the diameter of the exhaust hole is smaller than the radial width of the slider in the exhaust passage.

[0012] In one embodiment, the exhaust hole is configured to extend in the axial direction of the cover plate, the exhaust passage is configured to extend in the radial direction of the cover plate, and the extension direction of the air outlet hole is parallel to the exhaust hole.

[0013] In one embodiment, a groove body is configured on a first surface of a side of the cover plate corresponding to the first flange, and the first flange is configured to close a groove formed by the groove body on the first surface to enclose the exhaust duct.

[0014] In one embodiment, a plurality of the exhaust units are configured on the cover plate, and the plurality of the exhaust units correspond one-to-one to the plurality of the air outlet holes.

[0015] In one embodiment, a silencer structure corresponding to the air outlet is provided on the surface of the first flange, and an outlet flow channel connected to the air outlet is constructed inside the silencer structure, and the outlet flow channel includes a diffuser portion and a contraction portion distributed along its flow path, and the inner diameter of the diffuser portion is larger than that of the contraction portion.

[0016] In one embodiment, the silencing structure comprises a plurality of silencing sleeves nested in sequence, one end of the innermost central sleeve among the plurality of silencing sleeves is connected to the air outlet and the other end is closed, and each of the silencing sleeves is provided with an air vent;

[0017] Among them, the ventilation holes on the multiple silencer sleeves are connected to each other correspondingly to form the outlet air passage extending radially along the silencer sleeve, and there are at least two ventilation holes with different apertures among the multiple ventilation holes constituting the outlet air passage, and the contraction part is constructed on the ventilation hole with smaller aperture, and the diffusion part is constructed on the ventilation hole with larger aperture.

[0018] In one embodiment, each of the silencer sleeves is provided with a plurality of the vent holes, and the plurality of the vent holes on the same silencer sleeve are evenly distributed in the axial direction and the circumferential direction, respectively, so as to form a plurality of the outlet flow channels.

[0019] In one embodiment, the outermost surface sleeve among the plurality of silencer sleeves is constructed as a structure with one end open and the other end closed, and the surface sleeve covers the other silencer sleeves inside it so that one end of the other silencer sleeves including the center sleeve is closed.

[0020] In a second aspect, the present invention proposes a compressor, which includes the above-mentioned pump body assembly and thus has all the technical effects possessed by it.

[0021] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the present invention can be achieved.

[0022] Compared with the prior art, the pump assembly and compressor provided by the present invention have at least the following beneficial effects:

[0023] A pump assembly and a compressor of the present invention only have an air outlet on the flange and the exhaust unit is arranged in other structures. Compared with the existing exhaust valve seat and other structures arranged on the flange, the occupied area is greatly reduced, and the rigidity of the flange can be effectively guaranteed. In addition, based on the advantages of the small occupied area of ​​the air outlet and the low influence on the rigidity of the flange structure, multiple air outlets can be opened on the flange, thereby increasing the exhaust volume, reducing the exhaust resistance, and further improving the exhaust efficiency and reducing the power consumption, and finally effectively improving the energy efficiency of the compressor where the pump assembly is located. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0025] Figure 1 The overall structural schematic diagram of the pump assembly of the present invention is shown;

[0026] Figure 2 Shows Figure 1 A partial enlarged view of the middle A;

[0027] Figure 3 A schematic diagram showing a groove body on the surface of a cover plate in a pump body assembly of the present invention;

[0028] Figure 4 Shows Figure 3 A schematic diagram showing a slot body in which a slider and an elastic member are arranged;

[0029] Figure 5 A schematic diagram showing the air outlet holes on the surface of the first flange in the pump body assembly of the present invention;

[0030] Figure 6 A top view showing a sound-absorbing structure in a pump assembly of the present invention;

[0031] Figure 7Shows Figure 6 Schematic diagram of the cross section in the BB direction.

[0032] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0033] Reference numerals:

[0034] 1-first flange, 11-air outlet, 2-cover plate, 3-cylinder, 31-inner cavity, 4-exhaust unit, 41-exhaust duct, 42-slider, 43-elastic member, 44-exhaust hole, 5-silencing structure, 51-air outlet duct, 52-silencing sleeve, 521-center sleeve, 522-surface sleeve, 53-vent. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Example 1

[0037] An embodiment of the present invention provides a pump body assembly, which includes a first flange 1 and a cylinder 3 with an inner cavity 31. An exhaust structure is arranged between the first flange 1 and the cylinder 3. A plurality of air outlets 11 are arranged on the first flange 1. The exhaust structure is configured to be able to operate under the action of the gas pressure difference between the inside and outside of the inner cavity 31 to control the connection between the air outlet 11 and the inner cavity 31.

[0038] The exhaust structure includes a cover plate 2 arranged between the first flange 1 and the cylinder 3 and an exhaust unit 4 arranged on the cover plate 2. The exhaust unit 4 corresponds to the air outlet 11. The exhaust unit 4 is configured to operate under the action of the air pressure difference to control the connection between the air outlet 11 and the inner cavity 31.

[0039] Specifically, the overall structure of the pump assembly of the present invention is shown in the accompanying drawings. Figure 1 As shown, its main structure is basically the same as the existing pump assembly, and the present invention will not repeat the same structure as the existing pump assembly. The main invention of the present invention firstly relates to the exhaust unit 4 of the pump assembly, and the exhaust unit 4 is designed to solve the exhaust problem.

[0040] Refer to the attached pictures Figure 1 and Figure 2In the present invention, a cover plate 2 is firstly added to the pump body assembly, and the cover plate 2 is arranged between the first flange 1 of the pump body assembly and the cylinder 3, wherein the first flange 1 is the upper flange of the pump body assembly in this embodiment, and the first flange 1 can also be the lower flange of the pump body assembly as required. For the first flange 1, only the corresponding air outlet 11 is arranged on it, and the exhaust unit 4 is mainly arranged in the cover plate 2, and the exhaust valve seat and other structures on the original flange are cancelled, which greatly simplifies the structure that needs to be additionally constructed or arranged on the first flange 1. For the exhaust unit 4 arranged in the cover plate 2, it automatically controls the connection and disconnection between the air outlet 11 and the inner cavity 31 based on the internal and external pressure difference of the inner cavity 31 of the cylinder 3, and the exhaust unit 4 is sandwiched between the first flange 1 and the cylinder 3, and the first flange 1 and the cylinder 3 can help ensure the stability and sealing of the exhaust unit 4, so that the structure of the exhaust unit 4 itself can be simplified, and its space occupation can also be reduced, which minimizes the influence of the clearance volume on the energy efficiency of the compressor where the pump body assembly is located.

[0041] The vent hole 11 (as shown in the accompanying drawings) provided on the first flange 1 of the present invention Figure 2 and Figure 5 Compared with the existing exhaust valve seat and other structures arranged on the flange, the area occupied by the exhaust valve seat on the flange is greatly reduced, which can effectively ensure the rigidity of the flange. And based on the advantages of the small area occupied by the exhaust hole 11 on the flange and the low impact on the rigidity of the flange structure, multiple exhaust holes 11 can be opened on the first flange 1, thereby increasing the exhaust volume, reducing the exhaust resistance, and then improving the exhaust efficiency and reducing power consumption, and finally effectively improving the energy efficiency of the compressor where the pump body assembly is located.

[0042] Furthermore, the exhaust unit 4 includes an exhaust duct 41 and a slider 42 arranged in the exhaust duct 41, the first end of the exhaust duct 41 is connected to the inner cavity 31, and one end of the air outlet 11 is connected to the exhaust duct 41; wherein, the orifice of the end of the air outlet 11 connected to the exhaust duct 41 is located on the moving path of the slider 42 in the exhaust duct 41, and the slider 42 is constructed to be able to move in the exhaust duct 41 under the action of the gas pressure difference between the inside and outside of the inner cavity 31, so as to block the orifice or stagger with the orifice.

[0043] Specifically, as shown in the attached figure Figure 1 and Figure 2As shown, the exhaust unit 4 is mainly composed of an exhaust passage 41 and a slider 42. The first end of the exhaust passage 41 is connected to the inner cavity 31 of the cylinder 3, and one end of the air outlet 11 is connected to the circumferential inner wall of the exhaust passage 41, that is, the opening where one end of the air outlet 11 is connected to the exhaust passage 41 is located on the moving path of the slider 42 in the exhaust passage 41. Under the action of the gas pressure difference between the inner cavity 31 and the outer cavity 31, the slider 42 will move along the exhaust passage 41. When the gas pressure in the inner cavity 31 is greater than the external gas pressure, the slider 42 moves in a direction away from the first end of the exhaust passage 41 and close to the second end of the exhaust passage 41, and at the same time, it is staggered with the opening of the air outlet 11 during the movement, so that the inner cavity 31, the exhaust passage 41 and the air outlet 11 are connected, and the cylinder 3 can be exhausted. When the exhaust is completed, the air pressure in the inner cavity 31 of the cylinder 3 is lower than the external air pressure, and the slider 42 moves toward the first end of the exhaust duct 41 and away from the second end of the exhaust duct 41 and moves to correspond to the opening of the air outlet hole 11, thereby blocking the opening of the air outlet hole 11.

[0044] Among them, the opening of one end of the air outlet hole 11 connected to the exhaust duct 41 is close to the first end of the exhaust duct 41. In this way, when the slider 42 moves toward the first end of the exhaust duct 41 and away from the second end of the exhaust duct 41, the slider 42 finally abuts against the first end of the exhaust duct 41 and remains stationary. At this time, the slider 42 is opposite to the opening of the air outlet hole 11, which can ensure the reliability of sealing the opening of the air outlet hole 11.

[0045] Preferably, an elastic member 43 is provided between the slider 42 and the second end of the exhaust passage 41 , and the sum of the length of the elastic member 43 in a free state and the width of the slider 42 in the axial direction of the exhaust passage 41 is not less than the length of the exhaust passage 41 .

[0046] Specifically, as shown in the attached figure Figure 1 and Figure 2 As shown, the elastic member 43 is disposed between the slider 42 and the second end of the exhaust passage 41 and is preferably in a compressed state, so that when the slider 42 moves toward the second end, the elastic member 43 is further compressed, thereby providing power for the reverse reset of the slider 42.

[0047] Preferably, the width of the slider 42 in the axial direction and the radial direction of the exhaust passage 41 is greater than the diameter of the vent, so that the slider 42 can completely block the vent.

[0048] Furthermore, the exhaust unit 4 further includes an exhaust hole 44 , which is configured to connect the inner cavity 31 with the first end of the exhaust passage 41 , and a diameter of the exhaust hole 44 is smaller than a radial width of the slider 42 in the exhaust passage 41 .

[0049] Specifically, as shown in the attached figure Figure 2As shown, the exhaust unit 4 further includes an exhaust hole 44 connected to the first end of the exhaust duct 41, and the aperture of the exhaust hole 44 (specifically, the aperture in the width direction of the exhaust duct 41) is smaller than the width of the exhaust duct 41, as shown in the accompanying drawings Figure 3 As shown, when the slider 42 abuts the first end of the exhaust channel 41, the slider 42 cannot further enter the exhaust hole 44, and thus there is a space between the end face of the slider 42 and the exhaust hole 44, so that the pressure of the gas flowing from the exhaust hole 44 to the exhaust channel 41 can effectively act on the end face of the slider 42, thereby effectively pushing the slider 42 to move.

[0050] Further, the exhaust hole 44 is configured to extend along the axial direction of the cover plate 2 , the exhaust passage 41 is configured to extend along the radial direction of the cover plate 2 , and the extension direction of the air outlet hole 11 is parallel to the exhaust hole 44 .

[0051] Specifically, the exhaust hole 44 and the outlet hole 11 extend along the axial direction of the pump body structure on the cover plate 2 and the first flange 1, respectively, so that the length of the exhaust hole 44 and the outlet hole 11 can be minimized, and the space occupied by the two inside the cover plate 2 and the first flange 1 can be reduced, thereby reducing the impact on the structural rigidity of the cover plate 2 and the first flange 1. The exhaust channel 41 is configured to extend along the radial direction of the cover plate 2, so that sufficient space can be provided for the construction of the exhaust channel 41.

[0052] Optionally, a groove body is configured on the first surface of the cover plate 2 on one side corresponding to the first flange 1 , and the first flange 1 is configured to close a groove opening formed by the groove body on the first surface to enclose the exhaust passage 41 .

[0053] Specifically, as shown in the attached figure Figure 3 and Figure 4 As shown, the exhaust duct is based on the groove body on the surface of the cover plate, and combined with the groove of the first flange closing the groove body in the assembled state, the groove body can be enclosed to form an exhaust duct. Such a structural design allows the exhaust duct to be directly processed on the surface of the cover plate, improving the convenience of processing and subsequent assembly. Of course, the exhaust duct can also be completely set inside the cover plate as needed.

[0054] Preferably, a plurality of exhaust units 4 are constructed on the cover plate 2 , and the plurality of exhaust units 4 correspond to the plurality of air outlet holes 11 one by one, so that independent exhaust of the plurality of air outlet holes 11 is achieved.

[0055] Example 2

[0056] An embodiment of the present invention provides a pump body assembly, which includes a first flange 1 and a cylinder 3 with an inner cavity 31, a cover plate 2 is arranged between the first flange 1 and the cylinder 3, a plurality of air outlets 11 are configured on the first flange 1, an exhaust unit 4 is configured on the cover plate 2, and the exhaust unit 4 is configured to be able to operate under the action of the gas pressure difference between the inside and outside of the inner cavity 31 to control the connection between the air outlet 11 and the inner cavity 31.

[0057] The exhaust structure includes a cover plate 2 arranged between the first flange 1 and the cylinder 3 and an exhaust unit 4 arranged on the cover plate 2. The exhaust unit 4 corresponds to the air outlet 11. The exhaust unit 4 is configured to operate under the action of the air pressure difference to control the connection between the air outlet 11 and the inner cavity 31.

[0058] Specifically, the overall structure of the pump assembly of the present invention is shown in the accompanying drawings. Figure 1 As shown, its main structure is basically the same as the existing pump assembly, and the present invention will not repeat the same structure as the existing pump assembly. The main invention of the present invention firstly relates to the exhaust unit 4 of the pump assembly, and the exhaust unit 4 is designed to solve the exhaust problem.

[0059] Refer to the attached pictures Figure 1 and Figure 2 In the present invention, a cover plate 2 is firstly added to the pump body assembly, and the cover plate 2 is arranged between the first flange 1 of the pump body assembly and the cylinder 3, wherein the first flange 1 is the upper flange of the pump body assembly in this embodiment, and the first flange 1 can also be the lower flange of the pump body assembly as required. For the first flange 1, only the corresponding air outlet 11 is arranged on it, and the exhaust unit 4 is mainly arranged in the cover plate 2, and the exhaust valve seat and other structures on the original flange are cancelled, which greatly simplifies the structure that needs to be additionally constructed or arranged on the first flange 1. For the exhaust unit 4 arranged in the cover plate 2, it automatically controls the connection and disconnection between the air outlet 11 and the inner cavity 31 based on the internal and external pressure difference of the inner cavity 31 of the cylinder 3, and the exhaust unit 4 is sandwiched between the first flange 1 and the cylinder 3, and the first flange 1 and the cylinder 3 can help ensure the stability and sealing of the exhaust unit 4, so that the structure of the exhaust unit 4 itself can be simplified, and its space occupation can also be reduced, which minimizes the influence of the clearance volume on the energy efficiency of the compressor where the pump body assembly is located.

[0060] The vent hole 11 (as shown in the accompanying drawings) provided on the first flange 1 of the present invention Figure 2 and Figure 5 Compared with the existing exhaust valve seat and other structures arranged on the flange, the area occupied by the exhaust valve seat on the flange is greatly reduced, which can effectively ensure the rigidity of the flange. And based on the advantages of the small area occupied by the exhaust hole 11 on the flange and the low impact on the rigidity of the flange structure, multiple exhaust holes 11 can be opened on the first flange 1, thereby increasing the exhaust volume, reducing the exhaust resistance, and then improving the exhaust efficiency and reducing power consumption, and finally effectively improving the energy efficiency of the compressor where the pump body assembly is located.

[0061] Furthermore, the exhaust unit 4 includes an exhaust duct 41 and a slider 42 arranged in the exhaust duct 41, the first end of the exhaust duct 41 is connected to the inner cavity 31, and one end of the air outlet 11 is connected to the exhaust duct 41; wherein, the orifice of the end of the air outlet 11 connected to the exhaust duct 41 is located on the moving path of the slider 42 in the exhaust duct 41, and the slider 42 is constructed to be able to move in the exhaust duct 41 under the action of the gas pressure difference between the inside and outside of the inner cavity 31, so as to block the orifice or stagger with the orifice.

[0062] Specifically, as shown in the attached figure Figure 1 and Figure 2 As shown, the exhaust unit 4 is mainly composed of an exhaust passage 41 and a slider 42. The first end of the exhaust passage 41 is connected to the inner cavity 31 of the cylinder 3, and one end of the air outlet 11 is connected to the circumferential inner wall of the exhaust passage 41, that is, the opening where one end of the air outlet 11 is connected to the exhaust passage 41 is located on the moving path of the slider 42 in the exhaust passage 41. Under the action of the gas pressure difference between the inner cavity 31 and the outer cavity 31, the slider 42 will move along the exhaust passage 41. When the gas pressure in the inner cavity 31 is greater than the external gas pressure, the slider 42 moves in a direction away from the first end of the exhaust passage 41 and close to the second end of the exhaust passage 41, and at the same time, it is staggered with the opening of the air outlet 11 during the movement, so that the inner cavity 31, the exhaust passage 41 and the air outlet 11 are connected, and the cylinder 3 can be exhausted. When the exhaust is completed, the air pressure in the inner cavity 31 of the cylinder 3 is lower than the external air pressure, and the slider 42 moves toward the first end of the exhaust duct 41 and away from the second end of the exhaust duct 41 and moves to correspond to the opening of the air outlet hole 11, thereby blocking the opening of the air outlet hole 11.

[0063] Among them, the opening of one end of the air outlet hole 11 connected to the exhaust duct 41 is close to the first end of the exhaust duct 41. In this way, when the slider 42 moves toward the first end of the exhaust duct 41 and away from the second end of the exhaust duct 41, the slider 42 finally abuts against the first end of the exhaust duct 41 and remains stationary. At this time, the slider 42 is opposite to the opening of the air outlet hole 11, which can ensure the reliability of sealing the opening of the air outlet hole 11.

[0064] Preferably, an elastic member 43 is provided between the slider 42 and the second end of the exhaust passage 41 , and the sum of the length of the elastic member 43 in a free state and the width of the slider 42 in the axial direction of the exhaust passage 41 is not less than the length of the exhaust passage 41 .

[0065] Specifically, as shown in the attached figure Figure 1 and Figure 2 As shown, the elastic member 43 is disposed between the slider 42 and the second end of the exhaust passage 41 and is preferably in a compressed state, so that when the slider 42 moves toward the second end, the elastic member 43 is further compressed, thereby providing power for the reverse reset of the slider 42.

[0066] Preferably, the width of the slider 42 in the axial direction and the radial direction of the exhaust passage 41 is greater than the diameter of the vent, so that the slider 42 can completely block the vent.

[0067] Furthermore, the exhaust unit 4 further includes an exhaust hole 44 , which is configured to connect the inner cavity 31 with the first end of the exhaust passage 41 , and a diameter of the exhaust hole 44 is smaller than a radial width of the slider 42 in the exhaust passage 41 .

[0068] Specifically, as shown in the attached figure Figure 2 As shown, the exhaust unit 4 further includes an exhaust hole 44 connected to the first end of the exhaust duct 41, and the aperture of the exhaust hole 44 (specifically, the aperture in the width direction of the exhaust duct 41) is smaller than the width of the exhaust duct 41, as shown in the accompanying drawings Figure 3 As shown, when the slider 42 abuts the first end of the exhaust channel 41, the slider 42 cannot further enter the exhaust hole 44, and thus there is a space between the end face of the slider 42 and the exhaust hole 44, so that the pressure of the gas flowing from the exhaust hole 44 to the exhaust channel 41 can effectively act on the end face of the slider 42, thereby effectively pushing the slider 42 to move.

[0069] Further, the exhaust hole 44 is configured to extend along the axial direction of the cover plate 2 , the exhaust passage 41 is configured to extend along the radial direction of the cover plate 2 , and the extension direction of the air outlet hole 11 is parallel to the exhaust hole 44 .

[0070] Specifically, the exhaust hole 44 and the outlet hole 11 extend along the axial direction of the pump body structure on the cover plate 2 and the first flange 1, respectively, so that the length of the exhaust hole 44 and the outlet hole 11 can be minimized, and the space occupied by the two inside the cover plate 2 and the first flange 1 can be reduced, thereby reducing the impact on the structural rigidity of the cover plate 2 and the first flange 1. The exhaust channel 41 is configured to extend along the radial direction of the cover plate 2, so that sufficient space can be provided for the construction of the exhaust channel 41.

[0071] Optionally, a groove body is configured on the first surface of the cover plate 2 on one side corresponding to the first flange 1 , and the first flange 1 is configured to close a groove opening formed by the groove body on the first surface to enclose the exhaust passage 41 .

[0072] Specifically, as shown in the attached figure Figure 3 and Figure 4 As shown, the exhaust duct is based on the groove body on the surface of the cover plate, and combined with the groove of the first flange closing the groove body in the assembled state, the groove body can be enclosed to form an exhaust duct. Such a structural design allows the exhaust duct to be directly processed on the surface of the cover plate, improving the convenience of processing and subsequent assembly. Of course, the exhaust duct can also be completely set inside the cover plate as needed.

[0073] Preferably, a plurality of exhaust units 4 are constructed on the cover plate 2 , and the plurality of exhaust units 4 correspond to the plurality of air outlet holes 11 one by one, so that independent exhaust of the plurality of air outlet holes 11 is achieved.

[0074] Furthermore, a silencer structure 5 corresponding to the air outlet 11 is provided on the surface of the first flange 1, and an outlet flow channel 51 connected to the air outlet 11 is constructed inside the silencer structure 5. The outlet flow channel 51 includes a diffuser portion and a contraction portion distributed along its flow path, and the inner diameter of the diffuser portion is larger than that of the contraction portion.

[0075] Specifically, a silencer structure 5 is provided on the surface of the first flange 1 corresponding to each air outlet 11, and the silencer structure 5 can be fixed to the first flange 1 by means of snaps, pins, bolts, gluing, welding, etc. An outlet flow channel 51 is provided inside the silencer structure 5, and the gas discharged from the air outlet 11 needs to flow through the outlet flow channel 51 before it can be discharged. In this process, when the gas flows in the outlet flow channel 51, due to the change in the radial size of the diffuser and the contraction part of the outlet flow channel 51, the gas can diffuse in the diffuser with a larger space, thereby reducing the local flow velocity and dispersing the local flow direction, thereby achieving silencer and noise reduction from the aspect of changing the flow of the airflow.

[0076] Furthermore, the silencer structure 5 includes a plurality of silencer sleeves 52 nested in sequence, one end of the innermost center sleeve 521 among the plurality of silencer sleeves 52 is connected to the air outlet 11, and the other end is closed (including a structure in which the center sleeve 521 itself is closed at one end; also including a structure in which the center sleeve 521 itself is open at both ends, but one end is closed by other components), and each silencer sleeve 52 is respectively provided with an air vent 53; wherein the air vents 53 on the plurality of silencer sleeves 52 are correspondingly connected to each other to form an air outlet passage 51 extending radially along the silencer sleeve 52, and among the plurality of air vents 53 constituting the air outlet passage 51, at least two air vents 53 have different apertures, and the contraction portion is constructed on the air vent 53 with a smaller aperture, and the diffusion portion is constructed on the air vent 53 with a larger aperture.

[0077] Specifically, as shown in the attached figure Figure 6 and Figure 7 As shown, the silencer structure 5 is composed of a plurality of silencer sleeves 52 nested in sequence, and a vent hole 53 is provided on the silencer sleeve 52. The aperture sizes of the vent holes 53 of different silencer sleeves 52 are not completely consistent, and the vent holes 53 of different silencer sleeves 52 in the radial direction are correspondingly connected to each other, forming an outlet flow channel 51 with a diffusion part and a contraction part. In addition, the outlet flow channel 51 is composed of a plurality of vent holes 53, and the gas interacts with the porous structure of the outlet flow channel 51 when flowing in the outlet flow channel 51, including the airflow diffusion in the vent holes 53 corresponding to the diffusion part to change the flow direction, so that the noise sound waves collide and interfere with each other and consume the sound wave energy; and the gas noise sound waves generated by the airflow between the small holes resonate to further consume the sound wave energy, and finally achieve the purpose of silencing and noise reduction.

[0078] In addition, in order to eliminate noise of different frequencies, the size of the vent holes and the number of silencer sleeves can be changed to obtain a silencer structure for a dedicated frequency band.

[0079] Furthermore, each silencer sleeve 52 is provided with a plurality of vent holes, and the plurality of vent holes on the same silencer sleeve 52 are evenly distributed in the axial direction and the circumferential direction, respectively, so as to form a plurality of outlet air passages 51 , and the plurality of outlet air passages 51 further increase the outlet air area and reduce the outlet air resistance.

[0080] Furthermore, the outermost surface sleeve 522 among the multiple silencer sleeves 52 is constructed as a structure with one end open and the other end closed, and the surface sleeve 522 covers the other silencer sleeves 52 inside it, so that one end of the other silencer sleeves 52 including the center sleeve 521 is closed (the other silencer sleeves 52 inside the surface sleeve 52 can be open at both ends, or open at one end and closed at the other end).

[0081] Example 3

[0082] An embodiment of the present invention provides a compressor, which includes the pump body assembly of the above embodiment and thus has all the technical effects thereof.

[0083] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0084] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A pump assembly, characterized in that: It includes a first flange and a cylinder with an inner cavity, an exhaust structure is arranged between the first flange and the cylinder, a plurality of air outlets are arranged on the first flange, and the exhaust structure is configured to be able to operate under the action of the gas pressure difference between the inside and outside of the inner cavity to control the connection between the air outlets and the inner cavity.

2. The pump assembly according to claim 1, characterized in that: The exhaust structure includes a cover plate arranged between the first flange and the cylinder and an exhaust unit arranged on the cover plate, the exhaust unit corresponds to the air outlet, and the exhaust unit is configured to operate under the action of air pressure difference to control the connection between the air outlet and the inner cavity.

3. The pump assembly according to claim 2, characterized in that: The exhaust unit comprises an exhaust passage and a slider disposed in the exhaust passage, a first end of the exhaust passage is connected to the inner cavity, and one end of the air outlet is connected to the exhaust passage; Among them, the orifice at one end of the air outlet connected to the exhaust duct is located on the moving path of the slider in the exhaust duct, and the slider is constructed to be able to move in the exhaust duct under the action of the gas pressure difference between the inside and outside of the inner cavity to block the orifice or stagger with the orifice.

4. The pump assembly according to claim 3, characterized in that: An elastic member is disposed between the slider and the second end of the exhaust passage, and the sum of the length of the elastic member in a free state and the width of the slider in the axial direction of the exhaust passage is not less than the length of the exhaust passage.

5. The pump assembly according to claim 3, characterized in that: The width of the slider in the axial direction and the radial direction of the exhaust passage is greater than the diameter of the orifice, so that the slider can completely block the orifice.

6. The pump assembly according to claim 3, characterized in that: The exhaust unit further includes an exhaust hole, which is configured to connect the inner cavity with the first end of the exhaust passage, and a diameter of the exhaust hole is smaller than a width of the slider in a radial direction of the exhaust passage.

7. The pump assembly according to claim 6, characterized in that: The exhaust hole is configured to extend in the axial direction of the cover plate, the exhaust passage is configured to extend in the radial direction of the cover plate, and the extension direction of the air outlet hole is parallel to the exhaust hole.

8. The pump assembly according to any one of claims 3 to 7, characterized in that: A groove body is constructed on a first surface of a side of the cover plate corresponding to the first flange, and the first flange is constructed to be able to close a groove formed by the groove body on the first surface to enclose the exhaust passage.

9. The pump assembly according to any one of claims 2 to 7, characterized in that: A plurality of the exhaust units are constructed on the cover plate, and the plurality of the exhaust units correspond to the plurality of the air outlets one by one.

10. The pump assembly according to claim 1, characterized in that: A silencer structure corresponding to the air outlet is arranged on the surface of the first flange, and an outlet flow channel connected to the air outlet is constructed inside the silencer structure. The outlet flow channel includes a diffuser portion and a contraction portion distributed along its flow path, and the inner diameter of the diffuser portion is larger than that of the contraction portion.

11. The pump assembly according to claim 10, characterized in that: The silencing structure comprises a plurality of silencing sleeves nested in sequence, one end of the innermost central sleeve among the plurality of silencing sleeves is connected to the air outlet and the other end is closed, and each of the silencing sleeves is provided with an air vent; Among them, the ventilation holes on the multiple silencer sleeves are connected to each other correspondingly to form the outlet air passage extending radially along the silencer sleeve, and there are at least two ventilation holes with different apertures among the multiple ventilation holes constituting the outlet air passage, and the contraction part is constructed on the ventilation hole with smaller aperture, and the diffusion part is constructed on the ventilation hole with larger aperture.

12. The pump assembly according to claim 11, characterized in that Each of the silencer sleeves is provided with a plurality of vent holes, and the plurality of vent holes on the same silencer sleeve are evenly distributed in the axial direction and the circumferential direction, respectively, so as to form a plurality of outlet flow passages.

13. The pump assembly according to claim 11, characterized in that The outermost surface sleeve among the plurality of silencer sleeves is constructed as a structure with one end open and the other end closed, and the surface sleeve covers the other silencer sleeves inside it, so that one end of the other silencer sleeves including the central sleeve is closed.

14. A compressor, characterized in that: Comprising a pump body assembly as claimed in any one of claims 1 to 13.

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