Sliding vane structure for variable capacity compressor and compressor

Abstract

The present invention provides a vane structure and compressor for a variable displacement compressor, relating to the field of compressor technology. This invention addresses the technical problem in the prior art that the vane structure within a compressor with a constant working volume and displacement is unable to meet the demands for varying compressor exhaust volume due to varying external loads. The vane structure for a variable displacement compressor includes a vane body and a vane valve core, wherein the vane body and the vane valve core are connected. Rotating or moving the vane valve core can change the state of communication between the suction chamber and the compression chamber of the pump assembly and adjust the cross-sectional size of the communication channel between the suction chamber and the compression chamber. The present invention is used to achieve stepless variable displacement adjustment of the compressor exhaust volume.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a vane structure for a variable capacity compressor and a compressor. Background Art

[0002] For conventional rotor compressors, the amount of gas inhaled and discharged by the compressor in each working cycle is constant. However, during the actual operation of the heating and cooling equipment, its demand for the compressor exhaust volume changes. Because the heating and cooling equipment changes with the size of the environmental load, the compressor exhaust volume is required to be able to adjust its capacity accordingly to adapt to the changes in the external load of the heating and cooling equipment, improve the volumetric efficiency of the compressor, and thus improve the energy efficiency ratio and working reliability of the heating and cooling equipment, as well as the heat exchange stability of the use environment.

[0003] The applicant has discovered that the prior art has at least the following technical problems:

[0004] 1. Compressors with constant working volume displacement: When the external load changes, the displacement of the compressor remains constant. The compressor volumetric efficiency is low and it cannot adapt to the volume demand of heating and cooling equipment such as air conditioners when the external load changes randomly.

[0005] 2. Currently, there are relatively few mechanical variable capacity adjustment methods for compressors, which generally use a locking structure (such as a pin) to control the movement and locking of the entire slide. Summary of the Invention

[0006] The present invention aims to provide a vane structure for a variable displacement compressor and a compressor thereof. This structure addresses the technical problem in the prior art where vane structures in compressors with a constant displacement capacity are unable to meet the demands of varying compressor exhaust volume due to varying external loads. The various technical effects achieved by the preferred technical solution among the various technical solutions provided by the present invention are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] The present invention provides a vane structure for a variable capacity compressor, comprising a vane body and a vane valve core, wherein the vane body and the vane valve core are connected, and rotating or moving the vane valve core can change the communication state between the suction chamber and the compression chamber of the pump body assembly and can adjust the cross-sectional size of the communication channel between the suction chamber and the compression chamber.

[0009] Furthermore, the vane body is provided with a body through hole connecting the suction chamber and the compression chamber, and the vane valve core is inserted into the vane body and rotating the vane valve core to change the situation where the vane valve core blocks the body through hole.

[0010] Furthermore, a valve core through hole is provided on the sliding vane valve core, and when the body through hole is connected to the valve core through hole, the body through hole and the valve core through hole form the communicating channel.

[0011] Furthermore, the slide valve core is a cylindrical piece and is inserted into the slide body along the axis of the pump assembly. The diameter of the slide valve core is The diameter of the valve core through hole on the sliding valve core is d=(0.1-0.8)d x × H / L, the diameter of the body through hole d t For d≤d t <d x , where W is the thickness of the vane; D is the diameter of the arc surface at the end of the vane body close to the piston end of the pump body assembly; L is the length of the vane body along the radial direction of the pump body assembly; and H is the height of the vane body along the axial direction of the pump body assembly.

[0012] Furthermore, the distance L between the main body through hole and the slide body close to the piston end of the pump body assembly is t 4mm <L t <0.3L, where L is the length of the vane body along the radial direction of the pump body assembly.

[0013] Furthermore, the slide valve core includes a spherical portion and an inserting portion, the spherical portion and the inserting portion are connected, a cutting surface is provided on the spherical portion, and the slide valve core is rotated to form the communicating channel between the cutting surface and the through hole of the body.

[0014] Furthermore, the vane valve core is arranged at the end of the vane body, and a notch groove is provided on the vane valve core. When the vane valve core is rotated until the notch groove is exposed outside the vane body, the notch groove can connect the suction chamber and the compression chamber.

[0015] Furthermore, when the sliding vane valve core is moved in a radial direction of the pump body assembly in a direction away from the central axis of the pump body assembly, a gap between the sliding vane valve core and the piston of the pump body assembly forms the communication channel.

[0016] Further, the sliding vane valve core is arranged on one side of the sliding vane body; or, the sliding vane body includes an upper sliding vane part and a lower sliding vane part, the sliding vane valve core is clamped between the upper sliding vane part and the lower sliding vane part and the sliding vane valve core is connected to the upper sliding vane part and the lower sliding vane part.

[0017] A compressor comprising the sliding vane structure for a variable capacity compressor

[0018] The object of the present invention is to provide a vane structure for a variable volume compressor, comprising a vane body and a vane valve core. Rotating or moving the vane valve core can change the connection state between the suction chamber and the compression chamber of the pump body assembly and can adjust the cross-sectional size of the connection channel between the suction chamber and the compression chamber, thereby realizing stepless variable volume adjustment of the compressor exhaust volume, solving the technical problem in the prior art that the vane structure in the compressor with a constant working volume displacement is difficult to meet the demand for changes in the compressor exhaust volume due to different external loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of a pump assembly in the prior art that uses a locking pin to fix a slide;

[0021] Figure 2 is a schematic front view of the slide body described in Example 1 provided by the present invention;

[0022] Figure 3 is a left side schematic diagram of the slide body described in Example 1 provided by the present invention;

[0023] Figure 4 is a schematic diagram of the slide body described in Example 1 provided by the present invention;

[0024] Figure 5 Schematic diagram of the structure of the sliding vane valve core described in Example 1 provided by the present invention;

[0025] Figure 6 is a schematic front view of the slide structure described in Example 2 provided by the present invention;

[0026] Figure 7 yes Figure 6 AA sectional view of FIG;

[0027] Figure 8 This is a schematic structural diagram of the sliding vane valve core described in Example 2 provided by the present invention;

[0028] Figure 9 is a schematic front view of the slide body described in Example 3 provided by the present invention;

[0029] Figure 10 is a left side schematic diagram of the slide body described in Example 3 provided by the present invention;

[0030] Figure 11 Schematic diagram of the structure of the sliding vane valve core described in Example 3 provided by the present invention;

[0031] Figure 12 is a schematic front view of the slide body described in Example 4 provided by the present invention;

[0032] Figure 13 yes Figure 12 BB-direction cross-sectional diagram;

[0033] Figure 14 Schematic diagram of the structure of the sliding vane valve core described in Example 4 provided by the present invention;

[0034] Figure 15 is a schematic front view of the slide body described in Example 5 provided by the present invention;

[0035] Figure 16 yes Figure 15 CC cross-sectional view;

[0036] Figure 17 Schematic diagram of the structure of the sliding vane valve core described in Example 5 provided by the present invention;

[0037] Figure 18 is a schematic cross-sectional view of a pump assembly provided by an embodiment of the present invention;

[0038] Figure 19 is another cross-sectional schematic diagram of a pump assembly provided by an embodiment of the present invention;

[0039] Figure 20 It is a coordinate diagram of a constant displacement compressor in the prior art and the demand for compressor exhaust volume by external load;

[0040] Figure 21 It is a coordinate diagram of the compressor provided by the present invention and the compressor exhaust volume demand of the external load;

[0041] In the figure, 1-slide body; 11-body through hole; 12-accommodating groove; 13-mounting hole; 2-slide valve core; 21-valve core through hole; 22-spherical part; 221-cutting surface; 23-insertion part; 24-notch groove; 3-intake chamber; 4-compression chamber; 5-locking pin; 6-communication channel. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0043] See also Figures 1-21 The present invention provides a vane structure for a variable volume compressor, comprising a vane body 1 and a vane valve core 2, wherein the vane body 1 and the vane valve core 2 are connected, and rotating or moving the vane valve core 2 can change the connection state between the suction chamber 3 and the compression chamber 4 of the pump body assembly and can adjust the cross-sectional size of the connecting channel between the suction chamber 3 and the compression chamber 4. The present invention makes an innovative design for the vane structure. Compared with the conventional use of pins to directly lock the vane to achieve an unloading variable volume mode between the high and low pressure chambers on both sides of the vane, the present invention mainly adds a vane valve core to the vane, and the fitting clearance between the vane valve core 2 and the vane body 1 can make the vane valve core 2 adjustable within a certain range; the vane valve core 2 is adjusted according to the actual operating load of the compressor to achieve isolation and connection between the high and low pressure chambers on both sides of the vane body 1 by the vane valve core 2, and to achieve adjustment of the cross-sectional size of the connecting channel between the high and low pressure chambers, thereby achieving stepless variable volume adjustment of the compressor exhaust volume.

[0044] As an optional implementation of the embodiment of the present invention, a main body through hole 11 connecting the suction chamber 3 and the compression chamber 4 is provided on the slide body 1. The slide valve core 2 is inserted into the slide body 1 and rotating the slide valve core 2 can change the situation where the slide valve core 2 blocks the main body through hole 11, so as to realize stepless variable volume adjustment of the compressor exhaust volume. For specific implementation methods, please refer to Example 1 and Example 2.

[0045] Example 1:

[0046] See also Figure 2-5 A vane structure for a variable displacement compressor includes a vane body 1 and a vane valve core 2. The vane valve core 2 is inserted into the vane body 1. The vane body 1 is provided with a body through-hole 11 connecting the suction chamber 3 and the compression chamber 4. The vane valve core 2 is provided with a valve core through-hole 21. When the body through-hole 11 and the valve core through-hole 21 are connected, the body through-hole 11 and the valve core through-hole 21 form a connecting passage. Rotating the vane valve core 2 can change the situation in which the vane valve core 2 blocks the body through-hole 11. When the vane valve core 2 completely blocks the body through-hole 11, the vane structure isolates the suction chamber 3 and the compression chamber 4; when the body through-hole 11 and the valve core through-hole 21 are connected, the suction chamber 3 and the compression chamber 4 are connected to each other.

[0047] The vane body 1 is provided with a mounting hole 13, which extends along the axial direction of the pump body assembly or along the radial direction of the pump body assembly. The vane valve core 2 is arranged in the mounting hole 13. Figure 2 , the slide valve core 2 preferably extends along the axis direction of the pump body assembly; when the slide valve core 2 is a cylindrical member and is inserted into the slide body 1 along the axis direction of the pump body assembly, the diameter of the slide valve core 2 can be Wherein, W is the thickness of the sliding vane; and D is the diameter corresponding to the arc surface at the end of the sliding vane body 1 close to the piston end of the pump assembly.

[0048] The diameter of the valve core through hole 21 on the sliding valve core 2 can be d=(0.1~0.8)d x ×H / L; diameter d of the body through hole 11 t For d≤d t <d x , where L is the length of the vane body 1 along the radial direction of the pump body assembly; H is the height of the vane body 1 along the axial direction of the pump body assembly.

[0049] The distance L between the body through hole 11 and the slide body 1 close to the piston end of the pump body assembly t Can be 4mm <L t <0.3L, where L is the length of the vane body 1 along the radial direction of the pump body assembly.

[0050] The fitting clearance between the slide valve core 2 and the through hole 11 of the slide body 1 can be 0.15mm to 0.25mm.

[0051] When the cooling and heating equipment starts working, if the equipment workload is relatively large and the working environment conditions are relatively harsh (such as high-temperature cooling or low-temperature heating), the equipment system will feed back the workload demand signal to the compressor operation control module, and the system signal controls the compressor to adopt a large-capacity working mode. Specifically, the vane valve core 2 rotates a certain angle so that the valve core through hole 21 on the vane valve core 2 is completely sealed in the vane body 1, so that the suction chamber 3 and the compression chamber 4 of the pump body assembly are isolated. At this time, it is equivalent to the volume of the variable-capacity cylinder being fully utilized.

[0052] When the heating and cooling equipment starts working, if the equipment workload is relatively small at this time and the working environment conditions are relatively favorable, the equipment system will feed back the workload demand signal to the compressor operation control module, and the system signal will control the compressor to adopt a small-capacity working mode. Specifically, the vane valve core 2 rotates a certain angle so that the valve core through hole 21 on the vane valve core 2 is partially sealed in the vane body 1, so that the valve core through hole 21 on the vane valve core 2 is connected with the main body through hole 11 on the vane body 1, and finally the suction chamber 3 and the compression chamber 4 of the pump body assembly are connected. At this time, it is equivalent to that the volume of the variable displacement cylinder is partially utilized, that is, the small-volume variable displacement working mode of the compressor is realized, thereby improving the energy efficiency and working reliability of the compressor.

[0053] Example 2:

[0054] See also Figure 6-Figure 8 A vane structure for a variable displacement compressor includes a vane body 1 and a vane valve core 2. The vane valve core 2 is inserted into the vane body 1. The vane body 1 is provided with a body through hole 11 that connects the suction chamber 3 and the compression chamber 4. The vane valve core 2 includes a spherical portion 22 and an inserting portion 23. The spherical portion 22 and the inserting portion 23 are connected. The spherical portion 22 has a cutting surface 221. The vane valve core 2 is rotated to form a communication channel between the cutting surface 221 and the body through hole 11. Figure 6 , Figure 6 The diagram illustrates the connection passage 6 formed between the cutting surface 221 and the through hole 11 of the main body. Rotating the vane valve core 2 reduces the cross-sectional area of ​​the connection passage 6. Further rotation of the vane valve core 2 allows the vane valve core 2 to separate the suction chamber 3 from the compression chamber 4. The vane body 1 is provided with a mounting hole 13 extending along the axis of the pump assembly or in the radial direction of the pump assembly. The vane valve core 2 is disposed within the mounting hole 13, preferably extending in the radial direction of the pump assembly.

[0055] As an optional implementation scheme of the present invention, the vane valve core 2 is arranged at the end of the vane body 1, and a notch groove 24 is provided on the vane valve core 2. When the vane valve core 2 is rotated until the notch groove 24 is exposed outside the vane body 1, the notch groove 24 can connect the suction chamber 3 and the compression chamber 4. The specific structure can be referred to Example 3.

[0056] Example 3:

[0057] See also Figures 9-11A vane structure for a variable capacity compressor includes a vane body 1 and a vane valve core 2. The vane body 1 has a receiving groove 12 at one end near the axis of the pump assembly. The receiving groove 12 extends along the axis of the pump assembly. The vane valve core 2 is located within the receiving groove 12. A cylindrical member with a notched groove 24 is provided in the middle of the vane valve core 2. When the vane valve core 2 is rotated and the notched groove 24 is completely hidden in the receiving groove 12, the suction chamber 3 and the compression chamber 4 are separated. When the notched groove 24 is exposed outside the vane body 1, the notched groove 24 can connect the suction chamber 3 and the compression chamber 4. By rotating the vane valve core 2, variable capacity adjustment of the compressor can be achieved.

[0058] As an optional implementation of an embodiment of the present invention, when the vane valve core 2 is moved along the radial direction of the pump body assembly in a direction away from the central axis of the pump body assembly, a connecting channel is formed in the gap between the vane valve core 2 and the piston of the pump body assembly. For the specific structure, please refer to Example 4 and Example 5.

[0059] Example 4:

[0060] See also Figure 12-14 A vane structure for a variable displacement compressor includes a vane body 1 and a vane valve core 2. The vane body 1 includes an upper vane portion and a lower vane portion. The vane valve core 2 is sandwiched between the upper vane portion and the lower vane portion, and the vane valve core 2 is connected to both the upper vane portion and the lower vane portion. When the vane valve core 2 is moved along the radial direction of the pump body assembly in a direction away from the axis of the pump body assembly, a communication channel is formed between the vane valve core 2 and the piston of the pump body assembly. The end of the vane valve core 2 close to the piston of the pump assembly is an arc-shaped structure. When the vane structure isolates the suction chamber 3 and the compression chamber 4, the upper vane portion and the lower vane portion and the vane valve core 2 are in uniform piston contact to achieve isolation between the high and low pressure chambers. Raised portions can be provided on both sides of the vane valve core 2, and grooves are provided on the upper vane portion and the lower vane portion. The raised portions on the vane valve core 2 are inserted into the corresponding grooves. Through the radial sliding of the vane valve core 2, the suction chamber 3 and the compression chamber 5 in the pump body assembly are separated and connected to realize the loading and unloading of the variable capacity cylinder, that is, the variable capacity adjustment of the compressor.

[0061] Example 5:

[0062] See also Figure 15-17A vane structure for a variable capacity compressor includes a vane body 1 and a vane valve core 2. The vane valve core 2 is arranged on one side of the vane body 1. When the vane valve core 2 is moved along the radial direction of the pump body assembly in a direction away from the axis of the pump body assembly, a communication channel is formed between the vane valve core 2 and the piston of the pump body assembly. The end of the vane valve core 2 close to the piston of the pump assembly is an arc-shaped structure. When the vane structure isolates the suction chamber 3 and the compression chamber 4, the vane body 1 and the vane valve core 2 are in uniform piston contact to achieve isolation between the high and low pressure chambers. Through the radial sliding of the vane valve core 2, the suction chamber 3 and the compression chamber 5 in the pump body assembly are separated and connected to achieve loading and unloading of the variable capacity cylinder, that is, variable capacity regulation of the compressor.

[0063] Example 6:

[0064] A pump assembly includes a sliding vane structure for a variable capacity compressor provided by the present invention. Figure 18 and Figure 19 , illustrating the connecting channel 6 on the sliding structure.

[0065] Example 7:

[0066] A compressor comprises the sliding vane structure for a variable capacity compressor provided by the present invention.

[0067] Conventional fixed displacement compressors, when the external load of heating and cooling equipment changes randomly, especially when air conditioning equipment is in harsh working conditions such as low-temperature heating and high-temperature cooling, generally have the defects of insufficient high-temperature cooling capacity and insufficient heating capacity under low-temperature conditions. This causes customers to feel hot and cold during use of the heating and cooling equipment, resulting in poor comfort. At the same time, when conventional fixed displacement compressors work under harsh working conditions such as extreme loads, the compressor output capacity is low and the input power is high due to the mismatch of the compressor displacement, which ultimately leads to low energy efficiency and poor reliability of the heating and cooling equipment. For an analysis of the working mode and effect of conventional fixed capacity compressors in heating and cooling equipment systems, see Figure 16 .

[0068] This invention addresses the problem of high-efficiency heating and cooling equipment in the current HVAC industry being unable to adaptively adjust the output heating or cooling capacity when the external load randomly changes, especially under extremely harsh working conditions. In particular, the compressor is innovatively designed to enable the compressor to provide different displacements, using a small displacement under light loads and a large displacement under heavy loads, effectively leveraging the compressor's capacity adjustment capabilities. It has the advantages of low cost, simple structure, and good reliability. For an analysis of the working mode and effect of variable capacity compressors in heating and cooling equipment systems, see Figure 17 .

[0069] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A sliding vane structure for a variable capacity compressor, characterized in that: It comprises a slide body (1) and a slide valve core (2), wherein: The vane body (1) is connected to the vane valve core (2), and rotating or moving the vane valve core (2) can change the communication state between the suction chamber (3) and the compression chamber (4) of the pump body assembly and can adjust the cross-sectional size of the communication channel between the suction chamber (3) and the compression chamber (4), so as to achieve stepless variable volume adjustment of the compressor exhaust volume; The vane body (1) is provided with a body through hole (11) communicating with the suction chamber (3) and the compression chamber (4); the vane valve core (2) is inserted into the vane body (1) and rotating the vane valve core (2) can change the situation in which the vane valve core (2) blocks the body through hole (11); the vane valve core (2) is inserted into the vane body (1) along the axial direction of the pump body assembly or along the radial direction of the pump body assembly; the vane valve core (2) is provided with a valve core through hole (21); when the body through hole (11) is connected to the valve core through hole (21), the body through hole (11) and the valve core through hole (21) form the communicating channel; or, The slide valve core (2) comprises a spherical portion (22) and an inserting portion (23), the spherical portion (22) and the inserting portion (23) being connected, a cutting surface (221) being provided on the spherical portion (22), and the slide valve core (2) being rotated so as to form the connecting passage between the cutting surface (221) and the through hole (11) of the main body; or, the slide valve core (2) is provided at the end of the slide body (1), a notch groove (24) being provided on the slide valve core (2), and when the slide valve core (2) is rotated until the notch groove (24) is exposed outside the slide body (1), the notch groove (24) can connect the suction chamber (3) and the compression chamber (4); Alternatively, when the vane valve core (2) is moved in a radial direction of the pump body assembly in a direction away from the central axis of the pump body assembly, a communication channel is formed in the gap between the vane valve core (2) and the piston of the pump body assembly; the vane body (1) includes an upper vane portion and a lower vane portion, the vane valve core (2) is sandwiched between the upper vane portion and the lower vane portion, and the vane valve core (2) is connected to both the upper vane portion and the lower vane portion.

2. The sliding vane structure for a variable capacity compressor according to claim 1, characterized in that: The slide valve core (2) is a cylindrical part and is inserted into the slide body (1) along the axial direction of the pump body assembly. The diameter of the slide valve core (2) is The diameter d of the valve core through hole (21) on the sliding valve core (2) is (0.1-0.8)d x ×H / L; The diameter d of the body through hole (11) t For d≤d t <d x ,in, W is the thickness of the slider; D is the diameter of the arc surface at the end of the slide body (1) close to the piston of the pump assembly; L is the length of the vane body (1) along the radial direction of the pump body assembly; H is the height of the slide body (1) along the axial direction of the pump body assembly.

3. The vane structure for a variable capacity compressor according to any one of claims 1 to 2, characterized in that: The distance L between the body through hole (11) and the slide body (1) close to the piston end of the pump assembly is t 4mm <L t <0.3L, wherein L is the length of the vane body (1) along the radial direction of the pump body assembly.

4. A compressor, characterized in that: The invention comprises a sliding vane structure for a variable capacity compressor as described in any one of claims 1 to 3.

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