Pump assembly with exhaust structure and compressor

Abstract

The utility model relates to the technical field of compressors, and discloses a pump assembly with an exhaust structure and a compressor, the pump assembly comprises an upper support and a cylinder body, the upper support is provided with an upper end face and a lower end face, a first mounting groove is formed in the upper end face of the upper support, and a second mounting groove is formed in the lower end face of the upper support. A first installation groove is formed in the upper end face of the upper support, an exhaust hole used for exhausting refrigerant gas is formed in the groove bottom of the first installation groove, a drainage channel is formed between the side wall of the first installation groove and the lower end face of the upper support, a blade groove, a back pressure cavity and a spring hole are formed in the cylinder body, and the spring hole is communicated with the blade groove through the back pressure cavity. The upper end of the cylinder body is connected with the lower end face of the upper support, and the drainage channel is communicated with the first mounting groove and the backpressure cavity; the utility model has the following technical effects: high-pressure gas is drained to the backpressure cavity to play a thrust role on the blades in the blade grooves, so that the positions of the blades are ensured, the leakage of the compressor is avoided, and the performance and the use stability of the compressor are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and in particular relates to a pump component with an exhaust structure and a compressor. Background Art

[0002] Usually, a compressor is composed of components such as a pump assembly, a motor assembly, a housing assembly, refrigeration oil and a filter bottle. Among them, the pump assembly includes a cylinder body, in which a spring, a blade, a piston and an eccentric part of the shaft are installed. One end of the spring is fixed in the spring hole of the cylinder body, and the other end is connected to one end of the blade. The other end of the blade contacts the piston, and the piston is sleeved on the eccentric part of the shaft. The blades, the piston and the inner wall of the cylinder body form a compression chamber; when the shaft rotates, its eccentric part drives the piston to rotate to compress the refrigerant in the compression chamber, and the compressed refrigerant high-pressure gas is usually discharged through the exhaust hole of the upper support.

[0003] However, when the variable frequency rotary compressor operates at a low frequency, the exhaust and suction pressure difference is usually small, and the suction temperature is low. At this time, the lubrication capacity of the refrigeration oil decreases, the blade back pressure is insufficient, and the blade and piston cannot always maintain contact relying solely on the spring force, which leads to internal leakage in the rotary compressor and reduced performance and reliability. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the utility model provides a pump assembly and a compressor with an exhaust structure, which achieves the purpose of avoiding leakage of the compressor and improving the performance and use stability of the compressor.

[0005] The technical purpose to be achieved by the utility model is achieved through the following technical solutions:

[0006] The utility model provides a pump assembly with an exhaust structure, the pump assembly comprising an upper support and a cylinder body;

[0007] The upper support has an upper end surface and a lower end surface, a first mounting groove is formed on the upper end surface of the upper support, an exhaust hole for discharging refrigerant gas is opened at the bottom of the first mounting groove, and a drainage channel is formed between the side wall of the first mounting groove and the lower end surface of the upper support;

[0008] The cylinder body is provided with a blade groove, a back pressure cavity and a spring hole, and the spring hole is connected with the blade groove through the back pressure cavity;

[0009] The upper end of the cylinder body is connected to the lower end surface of the upper support, and the drainage channel is connected to the first mounting groove and the back pressure chamber.

[0010] In some implementations, the drainage channel includes a first drainage portion extending in a horizontal direction and a second drainage portion extending in a vertical direction;

[0011] The first drainage part is connected to the first installation groove and the second drainage part, and the second drainage part is connected to the back pressure chamber, so that the high-pressure gas entering the first installation groove through the exhaust hole enters the back pressure chamber through the first drainage part and the second drainage part, thereby exerting a thrust on the blades located in the blade groove.

[0012] In some implementations, the first drainage portion is exposed at the upper end surface of the upper support, thereby increasing the drainage amount and drainage speed of the high-pressure gas, and ensuring a certain thrust effect on the blades in the blade slot.

[0013] In some implementations, an opening of the second drainage portion exposed on the lower end surface of the upper support is aligned with an opening of the back pressure chamber exposed on the upper end of the cylinder body, thereby ensuring symmetrical flow of high-pressure gas.

[0014] In some implementations, the cylinder body is further provided with a compression chamber connected to the blade groove;

[0015] An exhaust groove is formed at the upper end of the cylinder body at a position corresponding to the exhaust hole, and the exhaust groove is connected to the compression chamber, so that the high-pressure gas passes through the compression chamber and the exhaust groove and is discharged through the exhaust hole.

[0016] In some implementations, the pump assembly further includes a shaft, a piston, and a blade, wherein the piston is located in the compression chamber, one end of the shaft passes through the piston and the upper support, the blade is located in the blade groove, and one end of the blade contacts the outer wall of the piston to avoid internal leakage.

[0017] In some implementations, a shaft sleeve is formed on the upper support at a position corresponding to the shaft, and the shaft sleeve serves as an installation guide for the shaft, thereby improving the stability of the shaft rotation.

[0018] In some implementations, a first through hole for positioning connection is provided on the upper support, and a second through hole corresponding to the first through hole is provided on the cylinder body. The first through hole and the second through hole are used to facilitate the alignment connection between the upper support and the cylinder body, while also improving the connection stability between the upper support and the cylinder body.

[0019] In some implementations, the pump assembly further includes a valve plate, which is installed in the first installation groove, and one end of the valve plate movably blocks the exhaust hole. The valve plate is provided to movably block the high-pressure gas discharged from the exhaust hole, which helps to reduce noise when the high-pressure gas is discharged.

[0020] The utility model also provides a compressor, comprising any one of the pump components described above, which effectively avoids internal leakage of the compressor and improves the performance and use stability of the compressor.

[0021] In summary, the utility model has at least the following benefits:

[0022] 1. The utility model provides a pump assembly with an exhaust structure. By setting a drainage channel, the high-pressure gas entering the first installation groove through the exhaust hole is drained into the back pressure chamber, which exerts a thrust on the blades located in the blade groove, ensuring that the blades and the piston always maintain a contact relationship, effectively avoiding leakage of the compressor, improving the performance and stability of the compressor, and at the same time, it can also play a certain silencing role with the help of the drainage channel to reduce the exhaust noise.

[0023] 2. The utility model provides a compressor which, after applying a pump assembly with an exhaust structure, effectively avoids internal leakage of the compressor and improves the performance and use stability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the pump assembly of Example 1 of the utility model;

[0025] Figure 2 This is a schematic structural diagram of the upper support of Example 1 of the utility model;

[0026] Figure 3 It is a top view of the upper support of Example 1 of the utility model;

[0027] Figure 4 for Figure 3 Sectional view in the AA direction;

[0028] Figure 5 This is a schematic structural diagram of a cylinder body according to Embodiment 1 of the present utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the cylinder body of Example 2 of the utility model;

[0030] Figure 7 This is a schematic structural diagram of a pump assembly according to Embodiment 2 of the present utility model;

[0031] Figure 8 A top view of a pump assembly according to Embodiment 2 of the present utility model;

[0032] Fig. 9 for Figure 8 Cross-sectional view in the BB direction;

[0033] Fig.10 This is a schematic diagram of a compressor according to Embodiment 3 of the present utility model;

[0034] 100. Pump assembly;

[0035] 200, upper support; 210, first mounting groove; 220, exhaust hole; 230, drainage channel; 231, first drainage part; 232, second drainage part; 240, shaft sleeve; 250, first through hole;

[0036] 300, cylinder body; 310, blade groove; 320, back pressure chamber; 330, spring hole; 340, compression chamber; 350, exhaust groove; 360, second through hole;

[0037] 400, shaft;

[0038] 500, piston;

[0039] 600, leaves;

[0040] 700, valve plate;

[0041] 800. Compressor. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0044] Embodiment 1:

[0045] See also Figure 1-Figure 5 , a pump assembly with an exhaust structure, the pump assembly includes an upper support 200 and a cylinder body 300.

[0046] The upper support 200 has an upper end face and a lower end face that are relatively arranged. The upper end face here can be understood as the upper surface located at the upper end of the upper support 200 under normal use conditions, and the lower end face is the lower surface located at the lower end of the upper support 200 under normal use conditions. A first mounting groove 210 is formed on the upper end face of the upper support 200, and an exhaust hole 220 for discharging refrigerant gas is provided at the bottom of the first mounting groove 210. It can be understood that the exhaust hole 220 passes through the lower end face and presents a through-hole structure. A drainage channel 230 is formed between the side wall of the first mounting groove 210 and the lower end face of the upper support 200. During the operation of the compressor, the compressed refrigerant high-pressure gas is discharged to the first mounting groove 210 through the exhaust hole 220 and then enters the drainage channel 230.

[0047] The cylinder body 300 is provided with a blade groove 310, a back pressure cavity 320 and a spring hole 330. Combining with the conventional structure of the cylinder body 300, it can be understood that the cylinder body 300 has a relatively arranged upper end face, a lower end face, and a circumferential inner wall and a circumferential outer wall. The back pressure cavity 320 runs through the upper end face and the lower end face of the cylinder body 300. The blade groove 310 is opened from the circumferential inner wall toward the circumferential outer wall, and the spring hole 330 is opened from the circumferential outer wall to the circumferential inner wall, wherein the spring hole 330 is connected with the blade groove 310 via the back pressure cavity 320.

[0048] With reference to the background technology, it can be understood that a blade is installed in the blade slot 310 and a spring is installed in the spring hole 330. Since the spring hole 330 is connected to the blade slot 310 via the back pressure chamber 320, when the spring and the blade are installed in place, the end of the blade close to the back pressure chamber 320 will be subject to the elastic contact of the spring.

[0049] When a conventional rotary compressor is operated at a low frequency, the pressure difference between the exhaust and suction is usually small, and the suction temperature is low. At this time, the lubrication capacity of the refrigeration oil decreases, the back pressure of the blades is insufficient, and the blades and the piston cannot always maintain contact relying solely on the elastic pressure of the spring, which leads to internal leakage in the rotary compressor, and the performance and reliability are reduced. In order to solve this problem existing in the background technology, in this embodiment, a drainage channel 230 is formed between the side wall of the first mounting groove 210 and the lower end surface of the upper support 200, the upper end of the cylinder body 300 is connected to the lower end surface of the upper support 200, and the drainage channel 230 is connected to the first The installation groove 210 and the back pressure chamber 320, so that when the rotary compressor is running, the refrigerant high-pressure gas discharged from the exhaust hole 220 can be drained to the back pressure chamber 320 through the drainage channel 230, so that the blade located in the blade groove 310 can obtain the thrust of the high-pressure gas in addition to the elastic pressure provided by the spring, ensuring that the other end of the blade and the piston are always in contact, avoiding internal leakage of the compressor, thereby improving the performance and reliability of the compressor. In addition, the drainage channel 230 is set to form an expansion-type resistant silencer structure, which can reduce exhaust noise and improve the user experience of the compressor.

[0050] See also Figure 4 In some embodiments, the drainage channel 230 includes a first drainage portion 231 extending in a horizontal direction and a second drainage portion 232 extending in a vertical direction, wherein the horizontal direction is Figure 4 The direction indicated by the arrow X is the vertical direction. Figure 4 In the direction indicated by the middle arrow Y; the first drainage part 231 is connected to the first installation groove 210 and the second drainage part 232, and the second drainage part 232 is connected to the back pressure chamber 320, so that the high-pressure gas entering the first installation groove 210 through the exhaust hole 220 enters the back pressure chamber 320 through the first drainage part 231 and the second drainage part 232, and exerts a thrust on the blades located in the blade groove 310.

[0051] The first drainage portion 231 extending in the horizontal direction extends from the groove wall of the first mounting groove 210 toward the outer peripheral wall of the upper support 200, while the second drainage portion 232 extending in the vertical direction extends from the upper end surface of the upper support 200 toward the lower end surface of the upper support 200, thereby achieving the function of draining the high-pressure gas into the back pressure chamber 320.

[0052] Furthermore, the first drainage portion 231 is exposed on the upper end surface of the upper support 200, which is equivalent to the first drainage portion 231 including a first air inlet port exposed on the groove wall of the first mounting groove 210 and a second air inlet port exposed on the upper end surface of the upper support 200. This structural design can increase the drainage amount of high-pressure gas and improve the drainage speed of high-pressure gas, thereby ensuring a certain thrust effect on the blades in the blade groove 310.

[0053] Furthermore, the opening of the second drainage portion 232 exposed on the lower end surface of the upper support 200 is aligned with the opening of the back pressure chamber 320 exposed on the upper end of the cylinder body 300, ensuring symmetrical flow of high-pressure gas.

[0054] It should be noted that the present embodiment does not impose any specific restriction on the position of the drainage channel 230 relative to the side wall of the first mounting groove 210. It is only necessary for the drainage channel 230 to connect the first mounting groove 210 and the back pressure chamber 320. In addition, there are no specific restrictions on the number and size of the drainage channels 230. The drainage channel 230 can be one or two, etc., and its size can be adjusted accordingly in combination with the opening size of the exhaust hole 220 and the back pressure chamber 320.

[0055] The utility model provides a pump assembly with an exhaust structure, which, by setting a drainage channel 230, drains the high-pressure gas entering the first installation groove 210 through the exhaust hole 220 into the back pressure chamber 320, and exerts a thrust on the blades located in the blade groove 310, ensuring that the blades and the piston 500 always maintain a contact relationship, effectively avoiding leakage of the compressor, and improving the performance and stability of the compressor. At the same time, the drainage channel 230 can also play a certain silencing role and reduce the exhaust noise.

[0056] Embodiment 2:

[0057] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the pump assembly of the utility model, see Figure 6-Figure 9 .

[0058] See also Figure 6 A compression chamber 340 connected to the blade groove 310 is provided on the cylinder body 300, and an exhaust groove 350 is formed at the upper end of the cylinder body 300 at a position corresponding to the exhaust hole 220. The exhaust groove 350 is connected to the compression chamber 340, so that the high-pressure gas passes through the compression chamber 340 and the exhaust groove 350 and is discharged through the exhaust hole 220.

[0059] The position of the exhaust hole 220 is designed to correspond to the exhaust groove 350, so that the refrigerant gas in the compression chamber 340 can enter the exhaust hole 220 through the exhaust groove 350 after being compressed, and then be discharged from the exhaust hole 220 to the first installation groove 210, and then enter the back pressure chamber 320 through the drainage channel 230, thereby generating thrust on the blades.

[0060] See also Fig. 9 In some embodiments, the pump assembly further includes a shaft 400, a piston 500 and a blade 600. The piston 500 is located in the compression chamber 340. One end of the shaft 400 passes through the piston 500 and the upper support 200. The blade 600 is located in the blade groove 310. One end of the blade 600 contacts the outer wall of the piston 500 to avoid internal leakage.

[0061] It can be seen from the foregoing that the spring hole 330 is connected to the blade groove 310 via the back pressure chamber 320, and the spring hole 330 is used to install a spring, which exerts an elastic pressure on the end of the blade 600 close to the back pressure chamber 320. At the same time, since the drainage channel 230 is connected to the back pressure chamber 320, the high-pressure gas discharged through the exhaust hole 220 can enter the back pressure chamber 320, thereby exerting a thrust on the end of the blade 600 close to the back pressure chamber 320. Under the dual effects of the elastic pressure of the spring and the thrust of the high-pressure gas, it is effectively ensured that the other end of the blade 600 close to the piston 500 always maintains contact with the outer wall of the piston 500, thereby avoiding leakage problems in the compressor.

[0062] In some embodiments, a shaft sleeve 240 is formed on the upper support 200 at a position corresponding to the shaft 400 , and the shaft sleeve 240 serves as an installation guide for the shaft 400 , thereby improving the rotation stability of the shaft 400 .

[0063] Furthermore, a first through hole 250 for positioning connection is provided on the upper support 200, and a second through hole 360 ​​corresponding to the first through hole 250 is provided on the cylinder body 300. The first through hole 250 and the second through hole 360 ​​are used to facilitate the alignment connection between the upper support 200 and the cylinder body 300, while also improving the connection stability between the upper support 200 and the cylinder body 300.

[0064] For example, the first through hole 250 is located at the edge of the upper support 200, and the second through hole 360 ​​is located at the edge of the cylinder body 300. The number of the first through holes 250 and the second through holes 360 can be adjusted according to actual needs. For example, the number of the first through holes 250 and the second through holes 360 are both two, three or four, and adjacent first through holes 250 and adjacent second through holes 360 are both arranged at intervals.

[0065] In some embodiments, the pump assembly also includes a valve plate 700, which is installed in the first installation groove 210, and one end of the valve plate 700 can flexibly cover the exhaust hole 220. The valve plate 700 is provided to flexibly cover the high-pressure gas discharged from the exhaust hole 220, which helps to reduce the noise when the high-pressure gas is discharged.

[0066] Specifically, one end of the valve plate 700 is fixedly installed in the first installation groove 210 by rivets or the like, and the other end of the valve plate 700 movably blocks the exhaust hole 220. When high-pressure refrigerant gas is discharged from the exhaust hole 220, the valve plate 700 will be pushed upward, so that the valve plate 700 is lifted upward relative to one end of the exhaust hole 220, thereby reducing the noise of the discharged gas to a certain extent.

[0067] Embodiment 3:

[0068] This embodiment provides a compressor based on the above embodiment 1. Fig.10 .

[0069] A compressor includes a pump assembly in any one of the above embodiments. After applying the pump assembly with an exhaust structure, internal leakage of the compressor is effectively avoided, and the performance and use stability of the compressor are improved.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0072] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0073] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A pump assembly with an exhaust structure, characterized in that: The pump assembly (100) comprises an upper support (200) and a cylinder body (300); The upper support (200) has an upper end surface and a lower end surface, a first mounting groove (210) is formed on the upper end surface of the upper support (200), a groove bottom of the first mounting groove (210) is provided with an exhaust hole (220) for discharging refrigerant gas, and a drainage channel (230) is formed between a side wall of the first mounting groove (210) and the lower end surface of the upper support (200); The cylinder body (300) is provided with a blade groove (310), a back pressure cavity (320) and a spring hole (330), and the spring hole (330) is communicated with the blade groove (310) via the back pressure cavity (320); The upper end of the cylinder body (300) is connected to the lower end surface of the upper support (200), and the drainage channel (230) is connected to the first installation groove (210) and the back pressure chamber (320).

2. The pump assembly with exhaust structure according to claim 1, characterized in that: The drainage channel (230) comprises a first drainage portion (231) extending in a horizontal direction and a second drainage portion (232) extending in a vertical direction; The first drainage portion (231) is in communication with the first mounting groove (210) and the second drainage portion (232), and the second drainage portion (232) is in communication with the back pressure chamber (320).

3. The pump assembly with exhaust structure according to claim 2, characterized in that: The first drainage portion (231) is exposed at the upper end surface of the upper support (200).

4. The pump assembly with exhaust structure according to claim 2, characterized in that: The opening of the second drainage portion (232) exposed at the lower end surface of the upper support (200) is aligned with the opening of the back pressure chamber (320) exposed at the upper end of the cylinder body (300).

5. The pump assembly with exhaust structure according to claim 1, characterized in that: The cylinder body (300) is also provided with a compression chamber (340) which is in communication with the blade groove (310); An exhaust groove (350) is formed at the upper end of the cylinder body (300) at a position corresponding to the exhaust hole (220), and the exhaust groove (350) is connected to the compression chamber (340).

6. The pump assembly with exhaust structure according to claim 5, characterized in that: The pump assembly also includes a shaft (400), a piston (500) and a vane (600), wherein the piston (500) is located in the compression chamber (340), one end of the shaft (400) passes through the piston (500) and the upper support (200), the vane (600) is located in the vane groove (310), and one end of the vane (600) contacts the outer wall of the piston (500).

7. The pump assembly with exhaust structure according to claim 6, characterized in that: A shaft sleeve (240) is formed on the upper support (200) at a position corresponding to the shaft (400).

8. The pump assembly with exhaust structure according to claim 1, characterized in that: The upper support (200) is provided with a first through hole (250) for positioning connection, and the cylinder body (300) is provided with a second through hole (360) corresponding to the first through hole (250).

9. The pump assembly with exhaust structure according to claim 1, characterized in that: The pump assembly further comprises a valve plate (700), wherein the valve plate (700) is installed in the first installation groove (210), and one end of the valve plate (700) is movably configured to cover the exhaust hole (220).

10. A compressor, characterized in that: The compressor (800) comprises the pump assembly according to any one of claims 1-9.

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