Pump body assembly and compressor
By designing the structure of the gas storage tank and ventilation hole in the pump body assembly to maintain the back pressure of the slide plate, the problem of the sliding plate and the roller disengagement of the variable frequency rotary compressor in low-temperature and low-frequency conditions is solved, and the normal operation of the compressor is achieved and cost reduction.
Patent Information
- Application Number
- CN202420630074.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-03-29
AI Technical Summary
In the low-temperature and low-frequency conditions of the variable frequency rotary compressor, insufficient suction overheat leads to irregular separation of the slide plate and the roller, causing the cylinder to be connected with the high and low pressure sides, the compressor exhaust flow attenuated, and the slide plate sound appears.
A pump body assembly is designed, in which the slide plate is equipped with an air storage groove, the bearing is equipped with a ventilation hole, the ventilation hole is connected to the gas storage groove, and high-pressure gas flows into the gas storage groove through the ventilation hole, maintaining the back pressure of the slide plate and preventing the slide plate from being Disengage from the roller.
By maintaining the back pressure of the slider, the slider is avoided from the roller, the compressor capacity attenuation and the generation of slide sound is prevented, the compressor is operated normally, and the structural complexity and manufacturing cost are reduced.
Smart Images
Figure CN222513568U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of compressors, for example, to a pump assembly and a compressor. Background Art
[0002] With the expansion of the operating range of variable frequency rotary compressors, when operating under low temperature and low frequency conditions; due to the insufficient suction superheat of the compressor under this condition, the suction process may be operated with liquid or liquid hammer. Since liquid is incompressible, when operating under harsh conditions, the gas-liquid mixed refrigerant sucked into the cylinder will cause the R surface of the vane and the outer circle of the roller, which should have been in contact during the suction process, to separate irregularly, resulting in the high and low pressure sides of the cylinder being connected, causing the gas on the high pressure side of the cylinder to flow to the low pressure side, causing the exhaust flow of the compressor to be severely attenuated, further leading to severe attenuation of the compressor capacity, and accompanied by the vane sound of the vane R surface hitting the outer circle of the roller.
[0003] The existing solutions mainly involve designing a mechanical connection structure between the roller and the slide; Figure 1 As shown, the roller and the slide are designed in an integrated manner, or, as shown Figure 2 As shown, the roller and the vane are mechanically fixed by a connecting rod or hinge to prevent the R surface of the vane from separating from the outer circle of the roller due to the impact pressure of the gas-liquid mixed refrigerant, thereby avoiding the capacity attenuation of the compressor and the vane sound caused by the roller hitting the vane.
[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:
[0005] When the roller and vane integrated design is adopted, since the vane is fixedly connected to the roller, a specific processing technology or specific equipment is required for the kinematic pair processing, which is more complicated and costly than conventional solutions. When a mechanical connection structure is adopted, assembly requirements are increased. On the one hand, the assembly process of the compressor components is increased, and on the other hand, in order to meet the accuracy requirements of the roller and vane after assembly, the processing accuracy of the roller and vane needs to be improved compared with the existing design, which further increases the manufacturing cost.
[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content
[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.
[0008] The disclosed embodiments provide a pump assembly and a compressor to ensure that a stable back pressure can be maintained on the vane side during the suction process to overcome the impact pressure of the suction refrigerant, thereby preventing the vane from separating from the roller, and avoiding compressor capacity attenuation and vane noise.
[0009] The disclosed embodiment provides a pump body assembly, which includes: a cylinder, which defines a compression chamber and a vane groove that are connected to each other; a roller, which is rotatably located in the compression chamber; a vane, which is movably located in the vane groove, the free end of the vane abuts against the outer circumference of the roller, and the outer circumferences of the vane and the roller divide the compression chamber into a high-pressure chamber and a low-pressure chamber; a bearing, which is arranged above the cylinder; wherein the vane is provided with an air storage groove, and the bearing is provided with an air vent, the air vent can be connected to the air storage groove, and high-pressure gas can flow into the air storage groove through the air vent to maintain the back pressure of the vane and prevent the free end of the vane from being separated from the outer circumference of the roller.
[0010] Optionally, the slide can move between a first position and a second position. When the compressor inhales air, the slide moves to the first position, and the air vent is connected to the air storage tank. When the compressor stops inhaling air, the slide moves to the second position, and the air vent is offset from the air storage tank to close the air storage tank.
[0011] Optionally, the air storage tank penetrates the sliding plate along the height direction of the sliding plate.
[0012] Optionally, the air storage tank extends in a waist shape or an arc shape along the height direction of the slide; and / or, the cross-sectional area of the air storage tank is the same along the height direction of the slide, or, along the direction from top to bottom, the cross-sectional area of the air storage tank first decreases and then increases.
[0013] Optionally, along the radial direction of the cylinder, the straight line where the center of the vent hole is located coincides with the center line of the air storage tank; or, along the radial direction of the cylinder, the center line of the air storage tank is located on the suction side of the straight line where the center of the vent hole is located, and the distance X between the straight line where the center of the vent hole is located and the center line of the upper end surface of the slide is ≤0.5mm.
[0014] Optionally, the length T1 of the air storage tank along the thickness direction of the sliding plate is ≤0.7T, where T is the thickness T of the sliding plate.
[0015] Optionally, the length of the air storage tank along the thickness direction of the sliding plate is 0.3T≤T1≤0.55T, where T is the thickness of the sliding plate.
[0016] Optionally, the vent hole is quasi-circular, and the aperture of the vent hole is smaller than the minimum length of the air storage groove along the thickness direction of the sliding plate.
[0017] Optionally, the pump body assembly also includes: a crankshaft, a through bearing, the crankshaft includes an eccentric portion, and a roller sleeve is arranged on the outside of the eccentric portion; the radial length of the air storage tank along the cylinder is L1≤0.5L, and L1≤2e+2, and L is the radial length of the slide along the cylinder, and e is the eccentricity of the crankshaft.
[0018] An embodiment of the present disclosure also provides a compressor, which includes a pump body assembly as described in any one of the above embodiments.
[0019] The pump assembly and compressor provided by the embodiments of the present disclosure can achieve the following technical effects:
[0020] The bearing is located above the cylinder, so that the bearing is also located above the vane groove and the vane. The air vent of the bearing can be connected to the air storage tank of the vane, so that when the compressor inhales air, high-pressure gas can flow into the air storage tank through the air vent of the bearing. The air storage tank is filled with high-pressure gas, which can ensure that the vane always maintains back pressure during the compressor suction process, thereby overcoming the impact pressure of the suction refrigerant, avoiding the separation of the vane and the roller, avoiding the attenuation of the compressor capacity or the generation of vane noise, so as to ensure the normal operation of the compressor. In the disclosed embodiment, it is only necessary to groove the vane and open holes in the bearing, without integrating the vane and the roller or using mechanical connection, which reduces the complexity of the vane and roller structure, reduces the difficulty of processing and assembly, and also reduces the production and manufacturing costs.
[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:
[0023] Figure 1 It is a schematic diagram of the matching structure of a roller and a sliding sheet in a related technology provided by an embodiment of the present disclosure;
[0024] Figure 2 is a schematic diagram of the matching structure of a roller and a sliding sheet in another related technology provided by an embodiment of the present disclosure;
[0025] Figure 3 is a schematic cross-sectional structure diagram of a pump body assembly in a related art provided by an embodiment of the present disclosure;
[0026] Figure 4 is a schematic cross-sectional structure diagram of a pump body assembly provided in an embodiment of the present disclosure;
[0027] Figure 5is a structural schematic diagram of a cylinder provided by an embodiment of the present disclosure;
[0028] Figure 6 is a schematic cross-sectional structure diagram of another pump body assembly provided by an embodiment of the present disclosure;
[0029] Figure 7 It is a partial structural schematic diagram of a pump body assembly provided by an embodiment of the present disclosure;
[0030] Figure 8 is a schematic cross-sectional structural diagram of a slide provided by an embodiment of the present disclosure;
[0031] Fig. 9 It is a schematic diagram of the structure of a slide provided in an embodiment of the present disclosure.
[0032] Reference numerals:
[0033] 10. Cylinder; 101. Compression chamber; 102. Sliding vane groove; 103. Intake port; 20. Roller; 201. Crankshaft; 202. Eccentric part; 30. Bearing; 301. Air vent; 302. Exhaust port; 303. Exhaust valve plate; 304. Auxiliary bearing; 40. Sliding vane; 401. Air storage tank; 402. Sliding vane spring. DETAILED DESCRIPTION
[0034] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.
[0035] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate to describe the disclosed embodiments here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.
[0036] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.
[0037] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.
[0038] Unless otherwise stated, the term "plurality" means two or more.
[0039] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.
[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.
[0041] An embodiment of the present disclosure provides a compressor, which includes a motor assembly and a pump body assembly. The motor assembly is drivingly connected to the pump body assembly, and the motor assembly is used to provide operating power for the pump body assembly.
[0042] like Figure 3 As shown, the pump body assembly includes a cylinder 10, a roller 20, a vane 40 and a bearing 30, wherein the cylinder 10 defines a compression chamber 101 and a vane slot 102 that are connected; the roller 20 is rotatably located in the compression chamber 101; the vane 40 is movably located in the vane slot 102, and specifically, the vane 40 is reciprocatingly slidably arranged in the vane slot 102 along the radial direction of the cylinder 10. The free end of the vane 40 abuts against the outer circumference of the roller 20, and the outer circumferences of the vane 40 and the roller 20 separate the compression chamber 101 into a high-pressure chamber and a low-pressure chamber; the bearing 30 is arranged above the cylinder 10.
[0043] Combination Figures 4 to 9As shown, an embodiment of the present disclosure provides a pump body assembly, which includes a cylinder 10, a roller 20, a vane 40 and a bearing 30. The vane 40 is provided with an air storage tank 401, and the bearing 30 is provided with an air vent 301. The air vent 301 can be connected to the air storage tank 401, and high-pressure gas can flow into the air storage tank 401 through the air vent 301 to maintain the back pressure of the vane 40 and prevent the free end of the vane 40 from separating from the outer peripheral surface of the roller 20.
[0044] In the disclosed embodiment, the roller 20 is movably located in the compression chamber 101, and the outer peripheral surface of the roller 20 and the free end of the sliding plate 40 divide the compression chamber 101 into a high-pressure chamber and a low-pressure chamber. The roller 20 rotates in the compression chamber 101 driven by the motor assembly, and the refrigerant can be compressed in the high-pressure chamber by changing the volume of the low-pressure chamber and the high-pressure chamber. The bearing 30 is provided with an exhaust port 302, and the exhaust port 302 is connected to the high-pressure chamber. The compressed refrigerant mixed with the gaseous lubricating oil can be discharged from the exhaust port 302.
[0045] In the above-mentioned pump body assembly, the bearing 30 is also provided with an air vent 301, and the vane 40 is provided with an air storage tank 401, so that high-pressure gas can also flow into the air storage tank 401 through the air vent 301, and the air storage tank 401 is filled with high-pressure gas, so that the high-pressure gas in the air storage tank 401 applies back pressure to the vane 40, so that the vane 40 can always maintain a stable back pressure, thereby enabling the free end of the vane 40 to always abut against the outer peripheral surface of the roller 20, thereby avoiding the separation of the vane 40 from the roller 20, thereby avoiding the high-pressure chamber and the low-pressure chamber of the cylinder 10 from being connected, causing the gas in the high-pressure chamber to flow to the low-pressure chamber, resulting in the problem of serious attenuation of the exhaust flow of the compressor. The pump body assembly of the disclosed embodiment has a simple structure and is easy to process. There is no need to connect the roller 20 and the vane 40, which reduces the difficulty of production, processing and assembly, reduces the cost, and has stronger applicability.
[0046] like Figure 4 As shown, the pump body assembly further includes a secondary bearing 304, which is located below the cylinder 10 and is used to seal the lower part of the cylinder 10. The bearing 30 is located above the cylinder 10 and is used to seal the upper part of the cylinder 10. That is, the bearing 30 is a main bearing, and the bearing 30 and the secondary bearing seal the upper part and the lower part of the cylinder respectively, so that the compression chamber is sealed.
[0047] The pump body assembly also includes a crankshaft 201, which passes through the bearing 30 and the auxiliary bearing 304. The roller 20 is sleeved on the outside of the crankshaft 201. The lower end of the crankshaft 201 can extend into the lubricating oil pool at the bottom of the shell. A central oil hole can be formed in the crankshaft 201. The bottom of the central oil hole is connected to the oil pool. Oil blades can be provided in the central oil hole to increase the oiling effect. The lubricating oil sucked up by the central oil hole can be used to lubricate the bearing 30, the roller 20 and the auxiliary bearing 304, etc., to reduce the wear of these components during operation and increase the life of the compressor.
[0048] Specifically, the crankshaft 201 includes an eccentric portion 202, and the roller 20 is sleeved on the eccentric portion 202. When the crankshaft 201 rotates, the eccentric portion 202 drives the roller 20 to rotate eccentrically and synchronously in the compressor chamber to change the volume of the high-pressure chamber and the low-pressure chamber. The bearing 30 can be used to support the middle and lower parts of the crankshaft 201, and the auxiliary bearing 304 can be used to support the lower end of the crankshaft 201. The roller 20 can be annular, the upper end surface of the roller 20 can be close to the lower surface of the bearing 30, the lower end surface of the roller 20 can be close to the upper surface of the auxiliary bearing 304, the outer circumference of the roller can slide on the inner circumference of the cylinder 10, and the roller 20 is used to compress the refrigerant entering the compression chamber 101.
[0049] Since the roller 20 is eccentrically mounted on the crankshaft 201 , a balancing block can be provided to balance the eccentricity of the crankshaft 201 during rotation, thereby improving the deflection of the crankshaft 201 . The balancing block can be provided on the rotor of the drive motor.
[0050] like Figure 5 As shown, the cylinder 10 is also configured with an air intake port 103, which penetrates the cylinder 10 in the radial direction of the cylinder 10, the air inlet of the air intake port 103 is connected to the outside of the cylinder 10, and the air outlet of the air intake port 103 is connected to the compression chamber 101. The air intake port 103 is used to realize the air intake of the compressor during the air intake stage, so that the refrigerant can flow into the compression chamber 101 through the air intake port 103. The air intake port 103 and the exhaust port 302 are respectively located on both sides of the slide 40. Specifically, the air intake port 103 can be located on the upstream side of the slide 40 in the rotation direction of the crankshaft 201, and the exhaust port can be located on the downstream side of the air intake port 103 in the rotation direction of the crankshaft 201. Preferably, the distance between the exhaust port and the slide 40 is less than the distance between the air intake port 103 and the slide 40. No air intake valve may be provided at the air intake port 103, and an exhaust valve plate 303 may be provided at the exhaust port to open or close the exhaust port.
[0051] Optionally, the slide 40 can move between a first position and a second position. When the compressor inhales air, the slide 40 moves to the first position, and the air vent 301 is connected to the air storage tank 401; when the compressor stops inhaling air, the slide 40 moves to the second position, and the air vent 301 is staggered with the air storage tank 401 to close the air storage tank 401.
[0052] In the disclosed embodiment, the slide vane 40 can adjust the connection and disconnection between the vent hole 301 and the gas storage tank 401 during the movement. When the compressor inhales air, the slide vane 40 moves to the first position, the vent hole 301 is connected with the gas storage tank 401, and the vent hole 301 and the gas storage tank 401 form a high-pressure gas channel, and the high-pressure gas can flow into the gas storage tank 401 through the vent hole 301, so that the slide vane 40 maintains a stable back pressure, overcomes the impact pressure of the inhaled refrigerant, and avoids the separation of the slide vane 40 and the roller 20. When the inhalation is completed, the slide vane 40 moves to the second position, and the vent hole 301 and the gas storage tank 401 are staggered, so that the vent hole 301 and the gas storage tank 401 are not connected, which can ensure the subsequent normal operation of the compressor.
[0053] Alternatively, if Figure 8 As shown, the air storage tank 401 extends along the height direction of the sliding plate 40 and penetrates the sliding plate 40 .
[0054] In the embodiment of the present disclosure, the air storage tank 401 extends along the height direction of the slide 40, which can increase the capacity of the high-pressure gas stored in the slide 40, and the air storage tank 401 extends along the height direction of the slide 40, so that the slide 40 has a back pressure in the height direction, so that the slide 40 can abut against the outer peripheral surface of the roller 20 in the height direction, thereby improving the stability of the abutment between the slide 40 and the roller 20.
[0055] Optionally, along the height direction of the sliding plate 40 , the air storage tank 401 extends in a waist shape or an arc shape.
[0056] In the embodiment of the present disclosure, the gas storage tank 401 extends in a waist or arc shape, which is convenient for processing and easy to implement. The gas storage tank 401 is arc-shaped, which means that at least one side of the gas storage tank 401 along the height direction of the slide 40 is arc-shaped.
[0057] Optionally, the cross-sectional area of the air storage tank 401 is the same along the height direction of the slide 40 , or, along the direction from top to bottom, the cross-sectional area of the air storage tank 401 decreases first and then increases.
[0058] In the embodiment of the present disclosure, the cross-sectional areas of the gas storage tank 401 along the height direction may be the same, which facilitates the processing of the gas storage tank 401. Similarly, the cross-sectional areas of the gas storage tank 401 along the height direction may also be different, for example, the gas storage tank 401 may also be two trapezoidal structures arranged up and down, and the two short sides of the trapezoid are connected, so that the cross-sectional area of the gas storage tank 401 decreases first and then increases.
[0059] It should be noted that the air storage tank 401 may also be other structures, and any structure that can maintain a stable back pressure on the sliding vane 40 is an optional embodiment of the present application.
[0060] Optionally, along the radial direction of the cylinder 10, the straight line where the center of the vent hole 301 is located coincides with the center line of the gas storage tank 401. This ensures that the slide 40 is subjected to force during movement and prevents the slide 40 from deforming. It also facilitates the high-pressure gas to flow from the vent hole 301 into the gas storage tank 401.
[0061] Optionally, along the radial direction of the cylinder 10 , the center line of the upper end surface of the sliding vane 40 coincides with the straight line where the center of the vent hole 301 is located.
[0062] Alternatively, if Figure 7 As shown, along the radial direction of the cylinder 10, the center line of the air storage tank 401 is located on the suction side of the straight line where the center of the vent hole 301 is located, and the distance X between the straight line where the center of the vent hole 301 is located and the center line of the upper end surface of the slide 40 is ≤0.5mm.
[0063] In the disclosed embodiment, the air intake side of the straight line where the center of the vent hole 301 is located refers to the side of the straight line where the center of the vent hole 301 is located facing the air intake port 103, so that the force stability of the slide 40 during movement can be further ensured, and the gas in the high-pressure chamber is prevented from being applied to the slide 40, causing deformation of the slide 40. Among them, when the distance between the straight line where the center of the vent hole 301 is located and the center line of the upper end face of the slide 40 is greater than 0.5mm, the vent hole 301 and the opening of the upper end of the gas storage tank 401 are staggered by a large distance, which easily causes the high-pressure gas to be applied to the outer wall surface of the slide 40, causing the slide 40 to deform.
[0064] For example, X is 0.5 mm, 0.4 mm, 0.3 mm or 0.2 mm, etc.
[0065] Optionally, along the radial direction of the cylinder 10 , the center line of the upper end surface of the slide vane 40 is located on the air intake side of the straight line where the center of the vent hole 301 is located.
[0066] Alternatively, if Fig. 9 As shown, the length T1 of the air storage tank 401 along the thickness direction of the sliding plate 40 is ≤0.7T, where T is the thickness T of the sliding plate 40 .
[0067] In the disclosed embodiment, the length of the air storage tank 401 along the thickness direction of the sliding plate 40 cannot be too large. When TI is greater than 0.7T, the strength of the sliding plate 40 will be reduced, which may easily cause deformation or damage of the sliding plate 40.
[0068] Optionally, the length of the air storage tank 401 along the thickness direction of the sliding plate 40 is 0.3T≤T1≤0.55T, where T is the thickness of the sliding plate 40 .
[0069] In the disclosed embodiment, when T1 is less than 0.3T, the length of the gas storage tank 401 along the thickness direction of the sliding plate 40 is too small, and the gas storage capacity of the gas storage tank 401 is small, resulting in too little high-pressure gas being stored, and the back pressure on the sliding plate 40 is small, and the sliding plate 40 and the roller 20 are still easy to separate. When T1 is greater than 0.55T, the length of the gas storage tank 401 along the thickness direction of the sliding plate 40 is large, which will reduce the strength of the sliding plate 40 and cause the sliding plate 40 to deform. Therefore, setting the width T1 of the gas storage tank 401 between 0.3T and 0.55T can ensure both the gas storage capacity of the gas storage tank 401 and the strength of the sliding plate 40.
[0070] For example, the length T1 of the air storage tank 401 along the thickness direction of the sliding sheet 40 can be 0.3T, 0.4T, 0.45T, 0.5T, 0.55T, etc.
[0071] Optionally, the vent hole 301 is quasi-circular, and the aperture of the vent hole 301 is smaller than the minimum length of the air storage tank 401 along the thickness direction of the sliding sheet 40 .
[0072] In the disclosed embodiment, if the aperture of the vent hole 301 is larger than the minimum length in the width direction of the gas storage tank 401, during the process of inflating the gas storage tank 401 from the vent hole 301, the flow rate of high-pressure gas entering the gas storage tank 401 of the slide 40 from the vent hole 301 is relatively large, and the pressure in the gas storage tank 401 will increase, resulting in turbulent air flow.
[0073] It should be noted that: the vent hole 301 is quasi-circular, which means that the vent hole 301 can be circular, approximately circular or elliptical.
[0074] Optionally, an opening is provided at the upper end of the gas storage tank 401, and the opening can be connected to the vent hole 301, wherein the aperture of the vent hole 301 is smaller than the length of the opening along the thickness direction of the slide 40, thereby preventing a large amount of high-pressure gas from flowing into the gas storage tank 401 through the vent hole 301, causing air flow turbulence.
[0075] Optionally, a radial length L1 of the air storage tank 401 along the cylinder 10 is ≤0.5L, where L is a radial length of the sliding vane 40 along the cylinder 10 , and L1 is ≤2e+2, where e is an eccentricity of the crankshaft 201 .
[0076] In the disclosed embodiment, the length L1 of the air storage tank 401 along the radial direction of the cylinder 10 is greater than 0.5L. A large length of the air storage tank 401 will reduce the strength of the sliding vane 40. The eccentricity e between L1 and the crankshaft 201 is within the above range, so that the distance between the air storage tank 401 and the crankshaft 201 is moderate, which can ensure that the pressure in the air storage tank 401 is stable during the operation of the compressor, and no gas leakage occurs.
[0077] Here, the eccentricity of the crankshaft 201 refers to the distance between the main journal centerline of the crankshaft 201 and the rotation centerline of the crankshaft 201 .
[0078] Optionally, the pump assembly further includes a vane spring 402, which is connected to the end of the vane 40 away from the roller 20, and the vane spring 402 is always in a compressed state so that the free end of the vane 40 always rests on the outer circumference of the roller 20. A dovetail groove is provided at the end of the vane 40 away from the roller 20, and the vane spring 402 is fixed by the dovetail groove and the cylinder 10.
[0079] Optionally, the upper wall of the bearing 30 is partially recessed to form a groove, in which an exhaust port 302 and a vent hole 301 are provided. The vent hole 301 is located on one side of the exhaust port 302 , wherein the aperture of the exhaust port 302 is larger than the aperture of the vent hole 301 .
[0080] Optionally, the bearing 30, the cylinder 10, and the auxiliary bearing 304 can be fastened by multiple bolts. The outer side of the bearing 30 can be sleeved with a main muffler, and the outer side of the auxiliary bearing 304 can also be sleeved with an auxiliary muffler, and the main muffler and the auxiliary muffler can improve the noise when the compressor is working.
[0081] An embodiment of the present disclosure further provides a compressor, which includes a pump body assembly as described in any one of the above embodiments.
[0082] The compressor provided in the embodiment of the present disclosure includes the pump body assembly of any one of the above embodiments, and thus has the beneficial effects of the pump body assembly of any one of the above embodiments, which will not be described in detail here.
[0083] Optionally, the compressor is a rotary compressor.
[0084] Optionally, the compressor is a single-cylinder compressor or a double-cylinder compressor.
[0085] The compressor includes a housing and a motor assembly, wherein the motor assembly and the pump assembly are located in the housing. Optionally, the housing may include a main housing, an upper housing, and a lower housing, wherein the main housing may form a ring shape with both the top and the bottom open, wherein the upper housing is disposed above the main housing, and the upper housing and the main housing may be welded into one body, wherein the lower housing is disposed below the main housing, and the lower housing and the main housing may be welded into one body, wherein the upper housing, the main housing, and the lower housing are combined to form a closed installation cavity, wherein the main components of the rotary compressor, such as the pump assembly and the motor assembly, are all disposed inside the installation cavity. However, it should be understood that the structure of the housing according to an embodiment of the utility model is not limited thereto.
[0086] The motor assembly is located above the pump assembly, and the motor assembly includes a motor, and the motor includes a stator and a rotor. The stator can be fixed on a housing, such as the inner wall of the main housing, and the rotor is rotatably arranged inside the stator. The rotor is fixed to the upper part of the crankshaft 201 to drive the crankshaft 201 to rotate around the central axis of the crankshaft 201. The electronic assembly also includes a motor terminal. The motor terminal can be arranged on the top of the motor, and the terminal can extend outward through the upper housing to be suitable for connecting a power source.
[0087] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims
1. A pump assembly, characterized in that: include: A cylinder defining a compression chamber and a sliding vane groove that are in communication; a roller rotatably disposed in the compression chamber; A sliding vane is movably located in the sliding vane groove, a free end of the sliding vane abuts against an outer peripheral surface of the roller, and the sliding vane and the outer peripheral surface of the roller divide the compression chamber into a high-pressure chamber and a low-pressure chamber; The bearing is arranged above the cylinder; Among them, the sliding vane is provided with an air storage groove, and the bearing is provided with an air vent, which can be connected with the air storage groove. High-pressure gas can flow into the air storage groove through the air vent to maintain the back pressure of the sliding vane and prevent the free end of the sliding vane from separating from the outer peripheral surface of the roller.
2. The pump assembly according to claim 1, characterized in that: The slide vane can move between a first position and a second position. When the compressor inhales air, the slide vane moves to the first position, and the air vent is connected to the air storage tank. When the compressor stops inhaling air, the slide vane moves to the second position, and the air vent is offset from the air storage tank to close the air storage tank.
3. The pump assembly according to claim 1, characterized in that: The air storage tank penetrates the sliding plate along the height direction of the sliding plate.
4. The pump assembly according to claim 1, characterized in that: Along the height direction of the sliding plate, the air storage tank extends in a waist shape or an arc shape; and / or, The cross-sectional area of the air storage tank is the same along the height direction of the sliding plate, or, along the direction from top to bottom, the cross-sectional area of the air storage tank first decreases and then increases.
5. The pump assembly according to claim 1, characterized in that: Along the radial direction of the cylinder, the straight line where the center of the vent hole is located coincides with the center line of the air storage tank; or, Along the radial direction of the cylinder, the center line of the air storage tank is located on the air intake side of the straight line where the center of the vent hole is located, and the distance X between the straight line where the center of the vent hole is located and the center line of the air storage tank is ≤0.5mm.
6. The pump assembly according to claim 1, characterized in that: The length of the air storage tank along the thickness direction of the sliding plate is T1≤0.7T, where T is the thickness T of the sliding plate.
7. The pump assembly according to claim 1, characterized in that: The length of the air storage tank along the thickness direction of the sliding plate is 0.3T≤T1≤0.55T, where T is the thickness of the sliding plate.
8. The pump assembly according to claim 1, characterized in that: The vent hole is quasi-circular, and the aperture of the vent hole is smaller than the minimum length of the air storage tank along the thickness direction of the sliding plate.
9. The pump assembly according to any one of claims 1 to 8, characterized in that: Also includes: A crankshaft passes through the bearing, the crankshaft includes an eccentric portion, and the roller is sleeved on the outer side of the eccentric portion; The radial length of the air storage tank along the cylinder is L1≤0.5L, and L1≤2e+2, wherein L is the radial length of the sliding vane along the cylinder, and e is the eccentricity of the crankshaft.
10. A compressor, characterized in that: The invention comprises a pump body assembly as claimed in any one of claims 1 to 9.