Pump body assembly, compressor and refrigeration device

Abstract

This utility model discloses a pump body assembly, a compressor, and a refrigeration device, relating to the field of refrigeration technology. The pump body assembly includes: a cylinder assembly with an exhaust passage; a first bearing disposed on one side of the cylinder assembly, the first bearing having at least one first vent hole, wherein at least one first vent hole is a first oblique vent hole with an inclined section, the axis of the inclined section forming an angle with the axis of the exhaust passage's outlet end; and a first muffler disposed on the side of the first bearing opposite to the cylinder assembly, the first muffler having at least one first silencer cavity, the exhaust passage's outlet end connecting to at least one of the first silencer cavities via the first oblique vent hole. The technical solution provided by this utility model can improve the compressor's energy efficiency and reduce noise.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and in particular to a pump assembly, a compressor, and a refrigeration device. Background Technology

[0002] In related technologies, in rotary compressors, a muffler is usually provided on the side of the bearing away from the cylinder. High-pressure refrigerant enters the muffler's muffler chamber after passing through the cylinder's exhaust passage and the bearing's vent hole, in order to achieve noise reduction.

[0003] Currently, the vent holes on bearings are generally designed as vertical vent holes coaxial with the exhaust passage on the cylinder. The position of the outlet of the vertical vent hole is restricted by the position of the exhaust passage of the cylinder and cannot avoid the muffler on the bearing end face. Especially when the muffler adopts a multi-layer structure design, the inner muffler will block a large area of ​​the outlet of the vertical vent hole. Due to the blocking and reflection of the muffler, the high-speed refrigerant in the vertical vent hole increases the airflow resistance and generates higher injection noise, which in turn leads to reduced compressor efficiency and worsened noise. Utility Model Content

[0004] The main purpose of this invention is to provide a pump assembly, a compressor, and a refrigeration device, which aims to improve the energy efficiency of the compressor and reduce noise.

[0005] To achieve the above objectives, the pump body assembly proposed in this utility model includes:

[0006] Cylinder assembly with exhaust passage;

[0007] A first bearing, disposed on one side of the cylinder assembly, is provided with at least one first vent hole, wherein at least one first vent hole is a first oblique vent hole having an oblique section, the axis of the oblique section being set at an angle to the axis of the exhaust end of the exhaust passage; and

[0008] A first muffler is disposed on the side of the first bearing opposite to the cylinder assembly. The first muffler has at least one first muffler chamber, and the exhaust end of the exhaust passage is connected to at least one of the first muffler chambers via the first oblique vent.

[0009] In one embodiment, the first muffler includes at least two layers of mufflers arranged along the axial direction of the first bearing. The innermost muffler is the inner layer muffler, which, together with the first bearing, forms an inner muffler cavity. An outer muffler cavity is formed between two adjacent layers of the mufflers. Both the inner and outer muffler cavities are the first muffler cavity. The end of the first oblique vent hole away from the exhaust passage is connected to the inner muffler cavity and / or the outer muffler cavity.

[0010] In one embodiment, the first bearing has a first end face facing the inner silencer, and the first oblique vent has an outlet located on the first end face, the outlet communicating with the inner silencer cavity.

[0011] In one embodiment, the inner silencer includes an inner cover that is open toward the first end face, and an inner flange disposed on the outer periphery of the open end of the inner cover, the inner flange abutting against the first end face.

[0012] In the radial direction of the first bearing, the distance between the inner edge of the inner flange near the air outlet and the outer edge of the inner flange is L1, and the distance between the outer edge of the air outlet and the outer edge of the inner flange is L2; ​​satisfying that L2 is greater than or equal to L1.

[0013] In one embodiment, the muffler located on the side of the inner muffler away from the first bearing is the outer muffler. The outer muffler includes an outer cover facing the opening of the inner muffler and an outer flange disposed on the outer periphery of the opening end of the outer cover. The outer flange abuts against the side of the inner flange away from the first end face.

[0014] In one embodiment, the oblique section extends from the air inlet end of the first oblique vent to the air outlet end;

[0015] Alternatively, the first oblique vent hole may also have an air inlet section, which extends coaxially with the air outlet end of the exhaust channel, and the exhaust channel, the air inlet section, the oblique vent section and the first silencer cavity are connected in sequence.

[0016] In one embodiment, the oblique hole segment extends from one end near the exhaust passage toward the end away from the exhaust passage and is inclined toward the center of the first bearing;

[0017] And / or, the angle between the axis of the inclined hole section and the axis of the exhaust end of the exhaust channel is not greater than 60°.

[0018] In one embodiment, the first oblique vent is a columnar hole with a constant cross-section; or, the first oblique vent is a stepped hole or a conical hole with a variable cross-section.

[0019] In one embodiment, the pump body assembly further includes:

[0020] A second bearing is disposed on the side of the cylinder assembly opposite to the first bearing, and the second bearing is provided with an air inlet and a second vent.

[0021] The second muffler is located on the side of the second bearing away from the cylinder assembly. The second muffler and the second bearing enclose a second muffler cavity. The air inlet is used to introduce gas from the cylinder assembly into the second muffler cavity. The second muffler cavity is connected to the air inlet end of the exhaust passage via the second vent.

[0022] In one embodiment, the pump body assembly further includes a main shaft, and the first bearing, the cylinder assembly, and the second bearing are sequentially sleeved on the main shaft along the axial direction. The cylinder assembly includes at least two cylinders arranged along the axial direction of the main shaft, and a separator disposed between any two adjacent cylinders. The exhaust passage passes through each cylinder and the separator along the axial direction of the main shaft.

[0023] In one embodiment, the at least two cylinders include a first cylinder and a second cylinder. The first bearing is disposed on the side of the first cylinder opposite to the second cylinder, and the second bearing is disposed on the side of the second cylinder opposite to the first cylinder. The first cylinder has a first exhaust port, and the second cylinder has a second exhaust port. The separator has an intermediate exhaust port. The first exhaust port, the intermediate exhaust port, and the second exhaust port are sequentially connected to form the exhaust channel. The axis of the inclined hole section is set at an angle to the axis of the first exhaust port.

[0024] In one embodiment, the spindle has a first end and a second end opposite to each other, the first end being used to connect a motor, and the first muffler, the first bearing, the first cylinder, the separator, the second cylinder, the second bearing and the second muffler being arranged sequentially in the direction from the first end to the second end.

[0025] This utility model also proposes a compressor, comprising:

[0026] case;

[0027] A pump body assembly, disposed within the housing, is the pump body assembly as described above; the pump body assembly further includes a main shaft; the cylinder assembly includes a cylinder and a piston disposed within the cylinder, the piston being sleeved around the main shaft; and

[0028] An electric motor is located inside the housing. The output shaft of the electric motor is driven to the main shaft. The electric motor is used to drive the main shaft to rotate, thereby causing the piston to rotate eccentrically inside the cylinder.

[0029] This utility model also proposes a refrigeration device, including the compressor described above.

[0030] The technical solution of this utility model involves setting up a cylinder assembly, a first bearing, and a first muffler. The exhaust outlet of the cylinder assembly's exhaust passage connects to the first muffler's first muffler chamber via a first oblique vent hole on the first bearing. Because the axis of the oblique section of the first oblique vent hole forms an angle with the axis of the exhaust outlet, the high-pressure refrigerant in the exhaust passage changes its airflow direction after passing through the oblique section before entering the first muffler chamber. By setting the oblique section, the outlet position of the first oblique vent hole can be offset radially from the exhaust outlet of the first bearing by a certain position. This allows the outlet position of the first oblique vent hole to be unrestricted. During manufacturing, the inclination angle and direction of the oblique section can be adjusted according to actual needs, ensuring that the outlet position of the first oblique vent hole avoids the edge of the first muffler as much as possible. This minimizes the obstruction of the first oblique vent hole by the first muffler, thereby reducing airflow resistance, avoiding high injection noise, improving compressor efficiency, and reducing noise. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the structure of an embodiment of the pump body assembly provided by this utility model;

[0033] Figure 2 for Figure 1 A partial enlarged view of the pump body assembly.

[0034] Explanation of icon numbers:

[0035] 100. Pump body assembly; 10. Cylinder assembly; 101. Exhaust passage; 11. First cylinder; 111. First exhaust port; 12. Second cylinder; 121. Second exhaust port; 13. Separator; 131. Intermediate exhaust port; 20. First bearing; 21. First oblique vent; 21a. Oblique section; 211. Air outlet; 30. First muffler; 301. First muffler chamber; 301a. Inner muffler chamber; 301b. Outer muffler chamber; 31. Inner muffler; 311. Inner cover; 312. Inner flange; 32. Outer muffler; 321. Outer cover; 322. Outer flange; 40. Second bearing; 41. Second vent; 50. Second muffler; 51. Second muffler chamber; 60. Main shaft.

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0038] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] In related technologies, rotary compressors typically have a muffler on the side of the bearing away from the cylinder. High-pressure refrigerant enters the muffler's silencing chamber after passing through the cylinder's exhaust passage and the bearing's vent, thus reducing noise. Currently, the vent on the bearing is generally designed as a vertical vent coaxial with the cylinder's exhaust passage. The outlet position of this vertical vent is limited by the position of the cylinder's exhaust passage and cannot avoid the muffler on the bearing end face. Especially when the muffler uses a multi-layer structure design, the inner layer of the muffler will block a large area of ​​the vertical vent outlet. The high-speed refrigerant in the vertical vent is reflected by the muffler, increasing airflow resistance and generating higher injection noise, which in turn leads to reduced compressor efficiency and worsened noise.

[0041] Based on this, the present invention proposes a pump body assembly 100. By optimizing the design of the vent hole on the pump body assembly 100, the energy efficiency of the compressor can be improved and the noise can be reduced.

[0042] The pump assembly 100 is used in a compressor, and more particularly relates to a rotary compressor, including but not limited to a single-cylinder rotary compressor with a single cylinder, or a multi-cylinder rotary compressor with multiple cylinders. For example, the pump assembly 100 can be used in a two-cylinder rotary compressor with two cylinders.

[0043] Please see Figure 1 In one embodiment of the present invention, the pump assembly 100 includes a cylinder assembly 10, a first bearing 20, and a first muffler 30. The cylinder assembly 10 has an exhaust passage 101; the first bearing 20 is disposed on one side of the cylinder assembly 10, and the first bearing 20 has at least one first vent hole, wherein at least one first vent hole is a first oblique vent hole 21 with an oblique section 21a, the axis of the oblique section 21a being set at an angle to the axis of the exhaust outlet end of the exhaust passage 101; the first muffler 30 is disposed on the side of the first bearing 20 away from the cylinder assembly 10, and the first muffler 30 has at least one first muffler cavity 301, the exhaust outlet end of the exhaust passage 101 being connected to at least one of the first muffler cavities 301 via the first oblique vent hole 21.

[0044] In practical applications, the pump assembly 100 is housed within the compressor housing. The pump assembly 100 includes a main shaft 60 and a cylinder assembly 10 sleeved around the main shaft 60. A motor connected to the main shaft 60 is also located within the compressor housing. The cylinder assembly 10 includes a cylinder with a compression chamber and a piston located within the compression chamber. The piston is sleeved on the main shaft 60. The motor drives the main shaft 60 to rotate, which in turn causes the piston to rotate against the inner surface of the cylinder, compressing the gas within the compression chamber to form high-pressure refrigerant. The cylinder assembly 10 also includes an exhaust passage 101 to facilitate the discharge of the high-pressure refrigerant. Taking a dual-cylinder rotary compressor as an example, the cylinder assembly 10 includes a first cylinder 11 and a second cylinder 12 spaced apart along the axial direction of the main shaft 60, and a separator 13 located between the first cylinder 11 and the second cylinder 12. The exhaust passage 101 extends along the axial direction of the main shaft 60 through the first cylinder 11, the separator 13, and the second cylinder 12. Of course, the cylinder assembly 10 may include only a single cylinder or two or more cylinders; no specific limitation is made here. To ensure the stability of the main shaft 60, the pump body assembly 100 also includes bearings for supporting the main shaft 60. For example, a first bearing 20 is provided on the side of the first cylinder 11 facing away from the partition 13, and a second bearing 40 is provided on the side of the second cylinder 12 facing away from the partition 13. Taking a vertical compressor as an example, the main shaft 60 extends vertically, and the first bearing 20, the first cylinder 11, the partition 13, the second cylinder 12, and the second bearing 40 are arranged sequentially from top to bottom and fitted around the outer periphery of the main shaft 60.

[0045] To reduce exhaust noise, a first vent hole is provided on the first bearing 20, and a first muffler 30 is provided on the side of the first bearing 20 away from the cylinder assembly 10. The first muffler 30 has a first muffler chamber 301. The exhaust end of the exhaust passage 101 of the cylinder assembly 10 is connected to the first muffler chamber 301 through the first vent hole, so that the high-pressure refrigerant generated by the cylinder assembly 10 can enter the first muffler chamber 301 through the exhaust passage 101 and the first vent hole, so as to achieve the effect of noise reduction.

[0046] The number of first vent holes can be set to one or more (i.e., two or more) according to actual needs. At least one of the first vent holes is a first oblique vent hole 21 with an oblique section 21a. That is, when there is a single first vent hole, it is a first oblique vent hole 21; when there are multiple first vent holes, some of the first vent holes can be first oblique vent holes 21, and other parts of the first vent holes can be straight vent holes or other irregularly shaped holes; or, all of the multiple first vent holes can be first oblique vent holes 21. The first oblique vent hole 21 has an oblique section 21a, which should be understood as at least a portion of the first oblique vent hole 21 in its extension direction being an obliquely set oblique section 21a. For example, all the sections of the first oblique vent hole 21 are oblique sections 21a, that is, the oblique section 21a extends from one end of the first oblique vent hole 21 to the other end. Of course, the inlet or outlet end of the first oblique vent 21 can also be set as the oblique vent section 21a.

[0047] The first muffler 30 is generally a cover structure, which can independently construct the first muffler cavity 301, or cooperate with the first bearing 20 to jointly construct the first muffler cavity 301. The first muffler 30 can be a single-layer or multi-layer cover structure, and the number of first muffler cavities 301 can also be one or more. For example, when the first muffler 30 includes an inner muffler 31 and an outer muffler 32, the first muffler cavity 301 includes an inner muffler cavity 301a formed by the inner muffler 31 and the first bearing 20, and an outer muffler cavity 301b formed by the inner muffler 31 and the outer muffler 32. The exhaust end of the exhaust passage 101 can be connected to at least one of the first muffler cavities 301 (e.g., the inner muffler cavity 301a and / or the outer muffler cavity 301b) through at least one of the first oblique vent holes 21. In addition, when there are multiple first vent holes, some of the first vent holes (at least one of which is the first oblique vent hole 21) may be connected to the first silencing cavity 301, while the outlet 211 of the other part of the first vent holes may be located outside the first silencer 30 and not connected to the first silencing cavity 301; or, all of the multiple first vent holes may be connected to the first silencing cavity 301.

[0048] It is understood that in the prior art, the vent hole on the bearing is usually designed as a vertical vent hole coaxial with the exhaust passage 101. Once the position of the exhaust passage 101 on the cylinder assembly 10 is fixed, the position of the vent hole on the bearing and the position of the vent outlet 211 are also fixed. However, the position of the exhaust passage 101 on the cylinder assembly 10 is usually designed to be closer to the outer peripheral wall of the cylinder assembly 10, which causes the position of the vent hole on the bearing to also be close to the outer peripheral wall of the bearing. This makes the position of the vent outlet 211 close to the edge of the muffler cavity, which is easily blocked by the edge of the muffler, resulting in increased airflow resistance and higher injection noise, which in turn leads to reduced compressor efficiency and worsened noise.

[0049] In this embodiment, the exhaust end of the exhaust passage 101 is connected to at least one of the first silencer chambers 301 via a first oblique vent 21, and the axis M1 of the oblique section 21a of the first oblique vent 21 is set at an angle to the axis M2 of the exhaust end of the exhaust passage 101. It is understood that the exhaust passage 101 has an exhaust port connected to the first oblique vent 21, and the normal perpendicular to the plane containing the exhaust port is also the axis M2 of the exhaust end of the exhaust passage 101. For ease of manufacturing, the exhaust passage 101 of the cylinder assembly 10 is typically configured as a straight hole extending coaxially, and correspondingly, the axis of the exhaust end of the exhaust passage 101 coincides with the axis of the exhaust passage 101. The axis M1 of the inclined section 21a of the first inclined vent 21 is tilted at a certain angle relative to the axis M2 of the outlet end of the exhaust channel 101, so that the high-pressure refrigerant in the exhaust channel 101 will change the airflow direction after passing through the inclined section 21a of the first inclined vent 21 and then enter the first silencer 301. By setting the oblique hole section 21a, the position of the outlet 211 of the first oblique vent 21 can be offset from the outlet end of the exhaust channel 101 in the radial direction of the first bearing 20 by a certain position. This makes the position of the outlet 211 of the first oblique vent 21 unrestricted. During processing, the inclination angle and inclination direction of the oblique hole section 21a can be adjusted according to actual needs so that the position of the outlet 211 of the first oblique vent 21 can avoid the edge position of the first silencer 30 as much as possible. This reduces the obstruction of the first oblique vent 21 by the first silencer 30, thereby reducing airflow resistance, avoiding high injection noise, and improving compressor efficiency and reducing noise.

[0050] like Figure 1As shown, in one embodiment, the first muffler 30 includes at least two layers of mufflers arranged along the axial direction of the first bearing 20. The innermost muffler is an inner muffler 31, which, together with the first bearing 20, forms an inner muffler cavity 301a. An outer muffler cavity 301b is formed between two adjacent layers of the mufflers. Both the inner muffler cavity 301a and the outer muffler cavity 301b are the first muffler cavity 301. One end of the first oblique vent 21, away from the exhaust channel 101, is connected to the inner muffler cavity 301a and / or the outer muffler cavity 301b.

[0051] In this embodiment, the first muffler 30 is composed of at least two layers of mufflers stacked together, resulting in a compact overall structure and the ability to construct at least two silencing cavities to further enhance noise reduction. The innermost muffler is defined as the inner muffler 31, and the other mufflers located on the side of the inner muffler 31 facing away from the first bearing 20 are defined as outer mufflers 32. The number of outer mufflers 32 can be one or more. Both the inner muffler 31 and the outer mufflers 32 are generally open-topped structures facing the first bearing 20. The inner muffler 31 and the first end face of the first bearing 20 enclose an inner silencing cavity 301a, and the outer muffler 32 and the inner muffler 31 enclose an outer silencing cavity 301b. When multiple outer mufflers 32 are provided, adjacent outer mufflers 32 can also enclose an outer silencing cavity 301b. That is, the first muffler 30 adopts a multi-layer structure, thus forming multiple first muffler cavities 301. One of the first muffler cavities 301 is the inner muffler cavity 301a, and the other first muffler cavities 301 are the outer muffler cavities 301b. The end of the first oblique vent 21 away from the exhaust channel 101 can be connected only to the inner muffler cavity 301a, or only to the outer muffler cavities 301b, or simultaneously to both the inner muffler cavities 301a and the outer muffler cavities 301b, as long as the gas output from the first oblique vent 21 can enter at least one of the first muffler cavities 301.

[0052] like Figure 1 As shown, in one embodiment, the first bearing 20 has a first end face facing the inner silencer 31, and the first oblique vent 21 has an outlet 211 located on the first end face, the outlet 211 communicating with the inner silencer cavity 301a.

[0053] In this embodiment, the first oblique vent 21 penetrates the first end face of the first bearing 20, forming an outlet 211 on the first end face. The outlet 211 is located within the enclosure area of ​​the inner silencer 31 and communicates with the inner silencer cavity 301a. The overall structure is simpler and easier to manufacture. Of course, in some embodiments, a connecting port can be provided on the inner silencer cover to connect the inner silencer cavity 301a and the outer silencer cavity 301b. In this way, the outlet 211 of the first oblique vent 21 can communicate with the outer silencer cavity 301b through the inner silencer cavity 301a and the connecting port.

[0054] like Figure 1 and Figure 2 As shown, in one embodiment, the inner silencer 31 includes an inner cover 311 open towards the first end face, and an inner flange 312 disposed on the outer periphery of the open end of the inner cover 311, the inner flange 312 abutting against the first end face; in the radial direction of the first bearing 20, the distance between the inner edge and the outer edge of the inner flange 312 near the air outlet 211 is L1, and the distance between the outer edge of the air outlet 211 and the outer edge of the inner flange 312 is L2; ​​satisfying that L2 is greater than or equal to L1.

[0055] In this embodiment, the inner silencer 31 abuts against the first end face via the inner flange 312, thereby allowing the inner cover 311 and the first end face to enclose and form an inner silencer cavity 301a. By providing the inner flange 312, the contact area between the inner silencer 31 and the first end face is increased, which helps improve the sealing performance of the inner silencer cavity 301a and also facilitates the connection and fixation of fasteners through the inner flange 312 to the first bearing 20. Alternatively, the inner flange 312 can also be welded to the first bearing 20. In the radial direction of the first bearing 20, the distance between the inner edge and the outer edge of the inner flange 312 near the air outlet 211 is L1, and the distance between the outer edge of the air outlet 211 and the outer edge of the inner flange 312 is L2; ​​L2 is greater than or equal to L1. In this way, the inner flange 312 will not block the air outlet 211, allowing the high-pressure refrigerant discharged from the first oblique vent 21 to enter the inner silencing cavity 301a more smoothly, thereby further reducing airflow resistance, reducing injection noise, further improving compressor efficiency, and reducing noise.

[0056] like Figure 1 and Figure 2As shown, in one embodiment, the muffler located on the side of the inner muffler 31 away from the first bearing 20 is the outer muffler 32. The outer muffler 32 includes an outer cover 321 facing the opening of the inner muffler 31, and an outer flange 322 disposed on the outer periphery of the opening end of the outer cover 321. The outer flange 322 abuts against the side of the inner flange 312 away from the first end face.

[0057] In this embodiment, the outer muffler 32 abuts against the inner muffler 31's inner flange 312 via the outer flange 322, thereby forming an outer muffler cavity 301b by the inner cover 311 and the outer cover 321. The overall structure is compact, which is beneficial for setting up a multi-layer muffler structure in a small space. By setting the outer flange 322, the contact area with the inner flange 312 can be increased, thereby improving the sealing performance of the outer muffler cavity 301b. It also facilitates the fastener to pass through the outer flange 322 and the inner flange 312 and be connected and fixed to the first bearing 20, so that the outer muffler 32, the inner muffler 31 and the first bearing 20 can be fixed at the same time with a single fastener. Alternatively, the outer flange 322 and the inner flange 312 can be welded and fixed so that the inner muffler 31 and the outer muffler 32 are pre-assembled as a whole.

[0058] like Figure 1 As shown, in one embodiment, the oblique hole segment 21a extends from the air inlet end of the first oblique vent 21 to the air outlet end. That is, all segments of the first oblique vent 21 are oblique hole segments 21a. This simplifies the structure of the first oblique vent 21. During processing, the first oblique vent 21 can be machined simply by tilting the drill bit through both axial sides of the first bearing 20, which simplifies the manufacturing process and improves production efficiency.

[0059] Of course, in some embodiments, a portion of the first oblique vent 21 may be an oblique section 21a. For example, in one embodiment, the first oblique vent 21 also has an inlet section, which extends coaxially with the outlet end of the exhaust channel 101, and the exhaust channel 101, the inlet section, the oblique section 21a, and the first silencing cavity 301 are sequentially connected. In this embodiment, the first oblique vent 21 is formed by connecting the inlet section and the oblique section 21a, with the inlet section extending coaxially with the outlet end of the exhaust channel 101, and the oblique section 21a being inclined relative to the inlet section. Thus, the high-pressure refrigerant in the exhaust channel 101 enters the inlet section without changing direction, and then changes direction in the oblique section 21a before flowing into the first silencing cavity 301.

[0060] like Figure 1As shown, in one embodiment, the oblique hole segment 21a extends from one end near the exhaust channel 101 toward the end away from the exhaust channel 101 and is inclined toward the center of the first bearing 20. This arrangement allows the outlet 211 of the first oblique vent hole 21 to be as close as possible to the center of the first bearing 20, thereby avoiding obstruction by the edge of the first silencing cavity 301.

[0061] The inclination angle of the inclined section 21a should not be too large. If the inclination angle is too large, the high-pressure refrigerant will encounter a large bend when flowing from the outlet section of the exhaust channel 101 to the inclined section 21a, resulting in increased airflow resistance. Alternatively, such as Figure 2 As shown, the angle between the axis M1 of the inclined section 21a and the axis M2 of the outlet end of the exhaust channel 101 is no greater than 60°. That is, the angle between the axis M1 of the inclined section 21a and the axis M2 of the outlet end of the exhaust channel 101 is α, satisfying 0° < α ≤ 60°. This prevents the inclination angle of the inclined section 21a from being too large, reducing airflow resistance and allowing the high-pressure refrigerant to enter the inclined section 21a of the first inclined vent 21 more smoothly from the exhaust channel 101. For example, α can be 60°, 50°, 40°, 30°, etc.

[0062] The shape of the first oblique vent 21 can also be set as a constant cross-section hole or a variable cross-section hole as needed.

[0063] For example, in one embodiment, the first oblique vent 21 is a cylindrical hole with a uniform cross-section. This simplifies the structure of the first oblique vent 21 and facilitates its fabrication. For instance, the first oblique vent 21 can be a cylindrical hole. In another embodiment, the first oblique vent 21 can be a stepped hole or a conical hole with a variable cross-section. For example, the first oblique vent 21 can be formed by connecting multiple cylindrical holes with different cross-sectional areas to create a stepped hole, or the first oblique vent 21 can be a conical hole with a gradually changing cross-sectional area.

[0064] Based on the above embodiments, such as Figure 1 As shown, in one embodiment, the pump assembly 100 further includes a second bearing 40 and a second muffler 50. The second bearing 40 is located on the side of the cylinder assembly 10 opposite to the first bearing 20, and the second bearing 40 has an air inlet and a second vent 41. The second muffler 50 is located on the side of the second bearing 40 opposite to the cylinder assembly 10, and the second muffler 50 and the second bearing 40 together form a second muffler cavity 51. The air inlet is used to introduce gas from the cylinder assembly 10 into the second muffler cavity 51, and the second muffler cavity 51 is connected to the air inlet end of the exhaust passage 101 via the second vent 41.

[0065] In this embodiment, the high-pressure refrigerant generated during the compression process of the cylinder assembly 10 enters the second muffler chamber 51 through the air inlet on the second bearing 40, then enters the exhaust channel 101 through the second vent 41, and finally enters the first muffler chamber 301 through the exhaust channel 101 and the first vent, thereby achieving multiple silencing effects and further improving the noise reduction effect. The second muffler 50 can be a single-layer or multi-layer cover structure, and can independently construct the second muffler chamber 51, or cooperate with the second bearing 40 to jointly construct the second muffler chamber 51. The number of second muffler chambers 51 can also be single or multiple. For example, in this embodiment, the second muffler 50 is a single-layer cover structure. The second muffler 50 includes a cover body, a first flange extending radially along the periphery of the cover body, and a second flange bent away from the cover body relative to the first flange. The first flange abuts against the side of the second bearing 40 away from the cylinder assembly 10, and the second flange surrounds the outer peripheral wall of the second bearing 40. This makes the fit between the second muffler 50 and the second bearing 40 tighter, improving the sealing performance of the second muffler cavity 51. The second vent hole 41 can be a straight hole, or at least a portion of the second vent hole 41 can be an inclined hole. The shape of the second vent hole 41 can also be configured as a cylindrical hole, a stepped hole, a tapered hole, or other irregularly shaped holes as needed.

[0066] like Figure 1 As shown, in one embodiment, the pump body assembly 100 further includes a main shaft 60. The first bearing 20, the cylinder assembly 10, and the second bearing 40 are sequentially sleeved on the main shaft 60 along the axial direction. The cylinder assembly 10 includes at least two cylinders arranged along the axial direction of the main shaft 60, and a separator 13 disposed between any two adjacent cylinders. The exhaust passage 101 passes through each cylinder and the separator 13 along the axial direction of the main shaft 60. By providing multiple cylinders, the displacement of the compressor can be increased, and the output power of the compressor can be improved. The number of cylinders can be two, three, or more.

[0067] Further, the at least two cylinders include a first cylinder 11 and a second cylinder 12. The first bearing 20 is disposed on the side of the first cylinder 11 away from the second cylinder 12, and the second bearing 40 is disposed on the side of the second cylinder 12 away from the first cylinder 11. The first cylinder 11 is provided with a first exhaust port 111, and the second cylinder 12 is provided with a second exhaust port 121. The separator 13 is provided with an intermediate exhaust port 131. The first exhaust port 111, the intermediate exhaust port 131, and the second exhaust port 121 are sequentially connected to form the exhaust channel 101. The axis of the inclined hole section 21a is set at an angle to the axis of the first exhaust port 111.

[0068] In this embodiment, the first exhaust through hole 111, the intermediate exhaust through hole 131, and the second exhaust through hole 121 are coaxially arranged, making the exhaust channel 101 a straight exhaust channel, which simplifies the overall structure and makes the hole processing more convenient. Of course, the above-mentioned exhaust through holes can also be arranged non-axially, as long as the axis of the inclined hole section 21a is tilted at a certain angle relative to the axis of the first exhaust through hole 111.

[0069] In one embodiment, the spindle 60 has a first end and a second end opposite to each other, the first end being used to connect a motor, and the first muffler 30, the first bearing 20, the first cylinder 11, the separator 13, the second cylinder 12, the second bearing 40 and the second muffler 50 being arranged sequentially in the direction from the first end to the second end.

[0070] In this embodiment, the first muffler 30 is disposed near the first end of the main shaft 60, and the second muffler 50 is disposed near the second end of the main shaft 60. The first end of the main shaft 60 is used to connect to the motor of the compressor, that is, the first end of the main shaft 60 is the power input end of the main shaft 60. Taking a vertical compressor as an example, the motor is usually located at the top of the compressor, and the first end of the main shaft 60 (that is, the top end of the main shaft 60) is connected to the output shaft of the motor. Then, the first muffler 30, the first bearing 20, the first cylinder 11, the separator 13, the second cylinder 12, the second bearing 40, and the second muffler 50 are arranged sequentially from top to bottom. That is, the first muffler 30 is the upper muffler, the first bearing 20 is the upper bearing, the first cylinder 11 is the upper cylinder, the second cylinder 12 is the lower cylinder, the second bearing 40 is the lower bearing, and the second muffler 50 is the lower muffler. Of course, the pump assembly 100 can also be applied to a horizontal compressor, in which case the main shaft 60 extends laterally (e.g., in the left-right direction), and the first silencer 30, the first bearing 20, the first cylinder 11, the separator 13, the second cylinder 12, the second bearing 40, and the second silencer 50 are arranged in the same order laterally (e.g., from left to right, or from right to left).

[0071] This utility model also proposes a compressor, which includes a housing, a pump assembly 100, and a motor. The pump assembly 100 and the motor are disposed within the housing. The pump assembly 100 includes a cylinder assembly 10, a first bearing 20, and a first muffler 30. The cylinder assembly 10 has an exhaust passage 101; the first bearing 20 is disposed on one side of the cylinder assembly 10, and the first bearing 20 has a first vent hole, wherein at least one of the first vent holes is a first oblique vent hole 21 with an oblique section 21a, the axis of the oblique section 21a being set at an angle to the axis of the exhaust outlet end of the exhaust passage 101; and the first muffler 30 is disposed on the side of the first bearing 20 away from the cylinder assembly 10, and the first muffler 30 has a first muffler cavity 301, the exhaust outlet end of the exhaust passage 101 being connected to at least one of the first muffler cavities 301 via the first oblique vent hole 21. The pump body assembly 100 further includes a main shaft 60, and the cylinder assembly 10 includes a cylinder and a piston disposed in the cylinder, the piston being sleeved around the main shaft 60; the output shaft of the motor is drivenly connected to the main shaft 60, and the motor is used to drive the main shaft 60 to rotate, thereby causing the piston to rotate eccentrically within the cylinder.

[0072] When the compressor is working, the motor drives the main shaft 60 to rotate, which in turn drives the piston to rotate in close contact with the inner surface of the cylinder, thereby compressing the gas in the compression chamber of the cylinder to form high-pressure refrigerant. The cylinder assembly 10 is also provided with an exhaust passage 101 to facilitate the discharge of the high-pressure refrigerant. The high-pressure refrigerant in the exhaust passage 101 changes its airflow direction after passing through the inclined section 21a of the first inclined vent 21, and then enters the first silencer chamber 301. By setting the oblique section 21a, the position of the outlet 211 of the first oblique vent 21 can be offset from the outlet end of the exhaust channel 101 radially from the first bearing 20 by a certain position. This allows the position of the outlet 211 of the first oblique vent 21 to be unrestricted. During processing, the inclination angle and direction of the oblique section 21a can be adjusted according to actual needs, so that the position of the outlet 211 of the first oblique vent 21 can avoid the edge of the first silencer 30 as much as possible. This minimizes the obstruction of the first silencer 30 to the first oblique vent 21, thereby reducing airflow resistance, avoiding high injection noise, and improving compressor efficiency while reducing noise. The compressor includes, but is not limited to, a single-cylinder rotary compressor with a single cylinder, or a multi-cylinder rotary compressor with multiple cylinders. For example, the compressor is a double-cylinder rotary compressor with two cylinders.

[0073] The specific structure of the pump body assembly 100 is as described in the above embodiments. Since this compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0074] This utility model also proposes a refrigeration device, including a compressor, which comprises a housing and a pump assembly 100. The specific structure of the pump assembly 100 is as described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. The refrigeration device includes, but is not limited to, refrigerators, integrated air conditioners, split air conditioners, ducted air conditioners, window air conditioners, etc.

[0075] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A pump body assembly, characterized in that, include: Cylinder assembly with exhaust passage; A first bearing, disposed on one side of the cylinder assembly, is provided with at least one first vent hole, wherein at least one first vent hole is a first oblique vent hole having an oblique section, the axis of the oblique section being set at an angle to the axis of the exhaust end of the exhaust passage; and A first muffler is disposed on the side of the first bearing opposite to the cylinder assembly. The first muffler has at least one first muffler chamber, and the exhaust end of the exhaust passage is connected to at least one of the first muffler chambers via the first oblique vent.

2. The pump body assembly as claimed in claim 1, characterized in that, The first muffler includes at least two layers of mufflers arranged along the axial direction of the first bearing. The innermost muffler is the inner layer muffler, which, together with the first bearing, forms an inner muffler cavity. An outer muffler cavity is formed between two adjacent layers of mufflers. Both the inner and outer muffler cavities are the first muffler cavity. The end of the first oblique vent hole away from the exhaust passage is connected to the inner muffler cavity and / or the outer muffler cavity.

3. The pump body assembly as described in claim 2, characterized in that, The first bearing has a first end face facing the inner silencer, and the first oblique vent has an outlet located on the first end face, the outlet communicating with the inner silencer cavity.

4. The pump body assembly as claimed in claim 3, characterized in that, The inner silencer includes an inner cover that is open toward the first end face, and an inner flange located on the outer periphery of the open end of the inner cover, the inner flange abutting against the first end face. In the radial direction of the first bearing, the distance between the inner edge of the inner flange near the air outlet and the outer edge of the inner flange is L1, and the distance between the outer edge of the air outlet and the outer edge of the inner flange is L2; ​​satisfying that L2 is greater than or equal to L1.

5. The pump body assembly as claimed in claim 4, characterized in that, The muffler located on the side of the inner muffler away from the first bearing is the outer muffler. The outer muffler includes an outer cover facing the opening of the inner muffler, and an outer flange located on the outer periphery of the opening end of the outer cover. The outer flange abuts against the side of the inner flange away from the first end face.

6. The pump body assembly as claimed in claim 1, characterized in that, The oblique section extends from the air inlet end of the first oblique vent to the air outlet end; Alternatively, the first oblique vent hole may also have an air inlet section, which extends coaxially with the air outlet end of the exhaust channel, and the exhaust channel, the air inlet section, the oblique vent section and the first silencer cavity are connected in sequence.

7. The pump body assembly as claimed in claim 1, characterized in that, The inclined hole section extends from one end near the exhaust channel toward the end away from the exhaust channel and is inclined toward the center of the first bearing; And / or, the angle between the axis of the inclined hole section and the axis of the exhaust end of the exhaust channel is not greater than 60°.

8. The pump body assembly as claimed in claim 1, characterized in that, The first oblique vent is a columnar hole with a constant cross-section; or, the first oblique vent is a stepped hole or a conical hole with a variable cross-section.

9. The pump body assembly as described in any one of claims 1 to 8, characterized in that, The pump assembly also includes: A second bearing is disposed on the side of the cylinder assembly opposite to the first bearing, and the second bearing is provided with an air inlet and a second vent. The second muffler is located on the side of the second bearing away from the cylinder assembly. The second muffler and the second bearing enclose a second muffler cavity. The air inlet is used to introduce gas from the cylinder assembly into the second muffler cavity. The second muffler cavity is connected to the air inlet end of the exhaust passage via the second vent.

10. The pump body assembly as claimed in claim 9, characterized in that, The pump body assembly further includes a main shaft, and the first bearing, the cylinder assembly, and the second bearing are sequentially sleeved on the main shaft along the axial direction. The cylinder assembly includes at least two cylinders arranged along the axial direction of the main shaft, and a separator disposed between any two adjacent cylinders. The exhaust passage passes through each cylinder and the separator along the axial direction of the main shaft.

11. The pump body assembly as claimed in claim 10, characterized in that, The at least two cylinders include a first cylinder and a second cylinder. The first bearing is located on the side of the first cylinder away from the second cylinder, and the second bearing is located on the side of the second cylinder away from the first cylinder. The first cylinder has a first exhaust port, and the second cylinder has a second exhaust port. The separator has an intermediate exhaust port. The first exhaust port, the intermediate exhaust port, and the second exhaust port are sequentially connected to form the exhaust channel. The axis of the inclined hole section is set at an angle to the axis of the first exhaust port.

12. The pump body assembly as claimed in claim 11, characterized in that, The main shaft has a first end and a second end opposite to each other. The first end is used to connect to a motor. The first muffler, the first bearing, the first cylinder, the separator, the second cylinder, the second bearing and the second muffler are arranged in sequence from the first end to the second end.

13. A compressor, characterized in that, include: case; A pump body assembly is disposed within the housing, the pump body assembly being the pump body assembly as described in any one of claims 1 to 12; the pump body assembly further includes a main shaft, and the cylinder assembly includes a cylinder and a piston disposed within the cylinder, the piston being sleeved around the periphery of the main shaft; as well as An electric motor is located inside the housing. The output shaft of the electric motor is driven to the main shaft. The electric motor is used to drive the main shaft to rotate, thereby causing the piston to rotate eccentrically inside the cylinder.

14. A refrigeration device, characterized in that, Includes the compressor as described in claim 13.

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