Stator with cooling cavity of scroll compressor and compressor

Abstract

The stator with the cooling cavity of the scroll compressor comprises an involute stator disc and a stator seat, the involute stator disc is arranged on the stator seat, a cooling channel is arranged in the stator seat, and the cooling channel can be communicated with an external cooling medium circulating system to cool a compression cavity. And at least part of the flow channel path in the cooling channel is matched with the involute path of the involute stator disc. The cooling channel is arranged in the stator and corresponds to the involute of the stator and the involute of the rotor, and the cooling channel can be connected with a pumping system and used for cooling the stator, so that high temperature caused by air compressed by the rotor in the compressor can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a stator with a cooling cavity of a scroll compressor and a compressor. Background Art

[0002] Compressors are also called air compressors, which are mainly used to compress gas. Oil-free scroll compressors can perform high-efficiency air compression through the relative movement of the moving and static scroll groups. Clean heat dissipation is one of the key technologies of oil-free scroll compressors. At the same time, scroll compressors have low working noise and lower maintenance costs than other compressors. They are a commonly used compressor structure. When the scroll compressor is in use, the compressed air generates heat due to friction, but there is no carrier to take away the dissipated heat. When the heat accumulates to a certain value, the scroll line inside the moving stator will deform and contact friction will occur, causing the compressor to be scrapped.

[0003] The working principle of the scroll compressor is mainly based on two involute scroll scrolls of the same shape but with an angular phase position relative to each other of 180°. One is the fixed scroll, i.e. the stator, and the other is the orbiting scroll, i.e. the rotor, which is driven by the eccentric shaft and whose axis revolves around the axis of the fixed scroll. The two scrolls are tangent to form sealing lines at multiple locations, and there are also appropriate seals at the end faces of the scrolls, thus forming multiple crescent-shaped air cavities. When the eccentric shaft rotates, the orbiting scroll will revolve relative to the fixed scroll. This movement causes the sealing line at the common tangent point between the two scrolls to continuously shift along the scroll curve, resulting in a continuous change in the shape and size of the crescent-shaped air cavity. As these air cavities close, they are no longer connected to the suction cavity, and their enclosed volume is gradually transferred to the center of the fixed scroll and shrinks, so that the gas is gradually compressed and the pressure increases.

[0004] In the prior art, the heat dissipation performance of existing compressors is easily overlooked, and most solutions to heat dissipation are to add a cooling fan to the motor. Although it has a certain heat dissipation effect, the heat dissipation effect is not ideal and the sustainability is poor. This will affect the normal operation of the compressor due to poor heat dissipation, resulting in the inability to guarantee work efficiency, which needs to be improved. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a stator and a compressor with a cooling cavity for a scroll compressor. A cooling channel is provided inside the stator, and the cooling channel corresponds to the involute of the stator and the involute of the rotor. The cooling channel can be connected with a pumping system to cool the stator, thereby reducing the high temperature caused by compressing air through the rotor in the compressor.

[0006] The utility model achieves the above technical purpose through the following technical means.

[0007] A stator with a cooling cavity for a scroll compressor comprises an involute stator disk and a stator seat, wherein the stator seat is provided with the involute stator disk, and a cooling channel is provided inside the stator seat, wherein the cooling channel can be connected to an external cooling medium circulation system to cool the compression cavity; at least part of the flow path in the cooling channel matches the involute path of the involute stator disk.

[0008] Furthermore, the cooling channel includes a first channel and a second channel, the flow path of the second channel is consistent with the involute path of the involute stator disk above it; the flow path of the first channel is consistent with the involute path of the involute rotor disk installed in the scroll compressor.

[0009] Furthermore, one end of the first channel is connected to one end of the second channel through an arc flow channel transition, the other end of the first channel is connected to the outside of the stator seat as a cooling channel inlet; the other end of the second channel is connected to the outside of the stator seat as a cooling channel outlet.

[0010] Furthermore, a plurality of arc-shaped protrusions are provided along the wall surfaces on both sides of the cooling channel, and adjacent arc-shaped protrusions are arranged in a staggered manner.

[0011] Furthermore, the height of each arc-shaped protrusion is H, the width of the cooling channel is W,

[0012] Furthermore, a plurality of heat pipes are embedded on the wall surface of the second channel at intervals along the path, one end of the heat pipe is located in the involute stator disk, and the other end of the heat pipe 4 is located in the second channel. A refrigerant is provided in the heat pipe for achieving cooling through physical form conversion between the involute stator disk and the second channel.

[0013] Furthermore, the heat pipe includes an evaporation section, a transition section and a condensation section connected in sequence; the evaporation section is located in the involute stator disk and is used to absorb the heat of the involute stator disk, the condensation section is located in the second channel, and a transition section is provided between the evaporation section and the condensation section for connecting to the stator seat.

[0014] Furthermore, the heat pipe includes a metal shell and a capillary structure arranged in the metal shell, the capillary structure is filled with refrigerant, and the refrigerant flows back due to the action of capillary force; the outer surface of the metal shell located in the second channel is a concave-convex texture for improving heat dissipation efficiency.

[0015] A scroll compressor comprises a stator with a cooling cavity, an involute rotor and a cooling medium circulation system of the scroll compressor, wherein the cooling medium circulation system is connected to a cooling channel, and the involute rotor is connected to a power unit; the power unit is used to provide power to the cooling medium circulation system.

[0016] Furthermore, one output end of the power unit is connected to the involute rotor, and the other output end of the power unit is equipped with a flywheel, which is located in the cooling medium tank and is used to pump the cooling medium tank into the cooling channel.

[0017] The beneficial effects of the utility model are:

[0018] 1. The stator with a cooling cavity of the scroll compressor described in the utility model is provided with a cooling channel inside the stator, and the cooling channel corresponds to the involute of the stator and the involute of the rotor. The cooling channel can be used with a pumping system to cool the stator, thereby reducing the high temperature caused by compressing air through the rotor in the compressor.

[0019] 2. The stator with a cooling cavity of the scroll compressor described in the utility model is provided with arc-shaped protrusions arranged in an interlaced manner facing each other on the walls on both sides of the cooling channel. When the coolant flows through adjacent arc-shaped protrusions, it will form a rotation in the flow direction. In the transition area between the high-speed flow and the low-speed flow before and after the arc-shaped protrusions, vortices are formed in the transition area due to the action of inertial force and viscous force, which can promote flow mixing, reduce the influence of the stagnation zone in the flow channel, and effectively improve the heat dissipation effect.

[0020] 3. The stator with a cooling cavity of the scroll compressor described in the utility model has a heat pipe embedded in the involute stator disk. The refrigerant is cooled by physical form conversion between the involute stator disk contacted by the heat pipe and the second channel. The coolant evaporated by high temperature is liquefied in the gas liquefaction section and becomes liquid again, without large coolant consumption.

[0021] 4. In the scroll compressor described in the utility model, an impeller is installed on the output shaft of the motor, and the impeller is located in the cooling medium tank. The cooling medium in the cooling medium tank is pumped out to realize the circulation of the cooling medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings described below are some embodiments of the utility model. For ordinary technicians in this field, it is obvious that other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the stator structure with a cooling cavity of the scroll compressor described in the utility model;

[0024] Figure 2 This is a cross-sectional view of the stator described in the utility model;

[0025] Figure 3 This is a cross-sectional view of the cooling channel described in the utility model;

[0026] Figure 4 This is a schematic diagram of the heat pipe structure of the utility model;

[0027] Figure 5 This is a working principle diagram of the scroll compressor described in the utility model;

[0028] In the figure:

[0029] 1-involute stator disk; 2-statator seat; 3-cooling channel; 3-1-first channel; 3-2-second channel; 3-3-arc-shaped protrusion; 4-heat pipe; 4-1-condensation section; 4-2-transition section; 4-3-evaporation section; 4-4-metal casing; 4-5-capillary structure; 5-motor; 6-involute rotor; 7-impeller; 8-cooling medium groove. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 and Figure 2 As shown, the stator with cooling cavity of the scroll compressor of the utility model comprises an involute stator disk 1 and a stator seat 2, the stator seat 2 is provided with the involute stator disk 1, and a cooling channel 3 is provided inside the stator seat 2. The cooling channel 3 is connected to the external cooling medium circulation system and is used for cooling the compression cavity during operation. Generally, the cooling channel can be annular or spiral.

[0034] like Figure 2 As shown, the cooling channel 3 of the present invention includes a first channel 3-1 and a second channel 3-2, the path of the flow channel of the first channel 3-1 is consistent with the involute path of the involute rotor disk installed in the scroll compressor; the path of the flow channel of the second channel 3-2 is consistent with the involute path of the involute stator disk 1 above it; generally, there are four crescent-shaped compression cavities with changing volumes in the involute stator and the involute rotor during operation, and the path of the flow channel of the first channel 3-1 is consistent with the involute path of the involute rotor disk installed in the scroll compressor, which can be understood as that in the initial assembly position, the involute path of the involute rotor disk is consistent with the flow channel of the first channel 3-1 The paths are basically parallel, and the first channel 3-1 is located in the stator seat 2; similarly, the path of the flow channel of the second channel 3-2 is consistent with the involute path of the involute stator disk 1 above it. It can be understood that the involute path of the involute stator disk 1 is basically parallel to the path of the flow channel of the second channel 3-2, and the second channel 3-2 is located in the stator seat 2; one end of the first channel 3-1 is connected to one end of the second channel 3-2 through a circular arc flow channel transition, and the other end of the first channel 3-1 is connected to the outside of the stator seat 2 as the inlet of the cooling channel 3; the other end of the second channel 3-2 is connected to the outside of the stator seat 2 as the outlet of the cooling channel 3. Since the involute path of the involute rotor disk after the scroll compressor is assembled and the involute path of the involute rotor disk are staggered and do not interfere in the plane, therefore Figure 2 It can be seen that the first channel 3-1 and the second channel 3-2 are also intertwined and do not interfere with each other, and are only connected through the arc flow channel transition at the center of the circle.

[0035] like Figure 3 As shown, the cooling channel 3 of the utility model is provided with a plurality of arc-shaped protrusions 3-3 facing each other along the groove walls on both sides, and two adjacent arc-shaped protrusions 3-3 are staggered. The protrusion height H of the arc-shaped protrusions 3-3 and the groove body width W of the heat dissipation groove 3 are to ensure that the coolant maintains good fluidity in the groove body of the heat dissipation groove 3. In the utility model, By setting the arc-shaped protrusion 3-3, the flow direction of the coolant in the cooling channel 3 is changed. When the coolant flows through the arc-shaped protrusion 3-3, it will form a rotation in the flow direction. In the transition area between the high-speed flow and the low-speed flow before and after the arc-shaped protrusion 3-3, vortices are formed in the transition area due to the action of inertial force and viscous force, which can promote flow mixing, reduce the influence of the stagnation zone in the cooling channel 3, and effectively improve the heat dissipation effect.

[0036] Taking into account the machinability of the involute stator, while ensuring the strength of the involute stator disk 1, the involute stator is divided into two parts along the upper surface or lower surface of the cooling channel 3 as a dividing line. The two parts are connected by pins or bolts, and sealing rings are provided on the contour edges of the two parts to ensure the sealing of the involute stator.

[0037] In order to ensure the heat dissipation effect, a plurality of mounting holes are processed on the wall surface of the second channel 3-2 along the path at intervals, and the mounting holes extend into the involute stator disk 1, and a heat pipe 4 is embedded in each mounting hole. Figure 4 As shown, one end of the heat pipe 4 is located in the mounting hole, and the other end of the heat pipe 4 is located in the second channel 3-2;

[0038] The heat pipe 4 includes an evaporation section 4-3, a transition section 4-2 and a condensation section 4-1 connected in sequence; the evaporation section 4-3 is located in the mounting hole, used to absorb the heat of the involute stator disk 1, and transfer this part of the heat to the condensation section 4-1 through the transition section 4-2, and the condensation section 4-1 is located in the second channel 3-2. The condensation section 4-1 protruding from the second channel 3-2 can also increase the number of collisions during the flow process in the second channel 3-2, which is more conducive to improving the efficiency of heat exchange; the condensation section 4-1 is in direct contact with the circulating coolant in the second channel 3-2 through convection. Since the other end of the heat pipe 4 is located in the second channel 3-2, that is, the other end of the heat pipe 4 can be regarded as a protrusion protruding from the surface of the second channel 3-2, which can also play the role of the arc protrusion 3-3, so the second channel 3-2 where the heat pipe 4 exists may not be provided with an arc protrusion 3-3, or the arc protrusion 3-3 in the second channel 3-2 of the heat pipe 4 is located between adjacent heat pipes 4.

[0039] like Figure 4As shown, the heat pipe 4 includes a metal shell 4-4 and a capillary structure 4-5 arranged in the metal shell 4-4. The capillary structure 4-5 is filled with refrigerant, and the refrigerant flows back through the action of capillary force. The outer surface of the metal shell 4-4 located in the second channel 3-2 is a concave-convex texture, in order to increase the contact area and improve the heat dissipation efficiency. The concave-convex texture can be micro-protrusions or micro-pits, or a combination of micro-protrusions and micro-pits. The metal shell 4-4 can be interference fit with the mounting hole, or directly welded in the mounting hole; the capillary structure 4-5 is fixed to the metal shell 4-4 by inlaying, and the refrigerant flows back through the action of capillary force. The refrigerant is cooled by physical form conversion between the involute stator disk 1 contacted by the heat pipe 4 and the second channel 3-2.

[0040] like Figure 4 As shown, the heat pipe 4 is a liquid wick heat pipe, which refluxes the refrigerant liquid by capillary action. The use of the liquid wick heat pipe does not need to consider the influence of the gravity of the refrigerant liquid, making the arrangement of the heat pipe 4 easier. The refrigerant liquid is dichloromethane. The purpose of using dichloromethane is that its liquid boiling point is 40 to 50 degrees Celsius. When the temperature of the inner cavity of the shell exceeds 40 degrees Celsius, the refrigerant liquid evaporates and takes away heat. The vaporized refrigerant liquid is liquefied in the condensation section 4-1 of the heat pipe to release heat, ensuring that the temperature of the inner cavity of the shell remains stable.

[0041] like Figure 5 As shown, the scroll compressor described in the utility model includes an involute stator and an involute rotor 2, wherein the involute rotor 2 is mounted on an eccentric shaft, and the eccentric shaft is connected to the output shaft at one end of the motor 5. Under the drive of the eccentric shaft, the center of the base circle of the involute rotor 2 performs eccentric motion, and air is sucked into the periphery of the stator through the air inlet. As the eccentric shaft rotates, the gas is gradually compressed in a number of crescent-shaped compression chambers formed by the engagement of the moving stator, and then discharged from the exhaust hole at the center of the involute stator. During the gas compression process, as the gas pressure increases, the internal temperature of the compressor gradually increases. The greater the gas pressure, the higher the temperature. The output shaft at the other end of the motor 5 of the utility model is connected to the impeller 7, and the impeller is located in the cooling medium tank 8, and is used to pump out the cooling medium in the cooling medium tank 8; the cooling medium tank 8 is connected to the inlet of the cooling channel 3 through a pipeline, and the outlet of the cooling channel 3 is connected to the cooling medium tank 8, so as to realize the circulation of the cooling medium. The cooling medium circulates between the cooling channel 3 and the cooling medium groove 8 to dissipate heat inside the cooling channel 3. The cooling medium in the cooling channel 3 is continuously exchanged with the coolant in the cooling medium groove 8, so that the cooling channel 3 always maintains an efficient cooling effect and reduces the internal temperature of the compressor.

[0042] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0043] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the protection scope of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator with a cooling cavity for a scroll compressor, comprising an involute stator disc (1) and a stator seat (2), wherein the stator seat (2) is provided with the involute stator disc (1), characterized in that: A cooling channel (3) is provided inside the stator seat (2), and the cooling channel (3) can be connected to an external cooling medium circulation system to cool the compression cavity; at least part of the flow path in the cooling channel (3) matches the involute path of the involute stator disk (1).

2. The stator with a cooling chamber for a scroll compressor according to claim 1, characterized in that: The cooling channel (3) comprises a first channel (3-1) and a second channel (3-2), wherein the flow path of the second channel (3-2) is consistent with the involute path of the involute stator disk (1) above it; and the flow path of the first channel (3-1) is consistent with the involute path of the involute rotor disk installed in the scroll compressor.

3. The stator with a cooling chamber for a scroll compressor according to claim 2, characterized in that: One end of the first channel (3-1) is connected to one end of the second channel (3-2) via a circular arc flow channel transition; the other end of the first channel (3-1) is connected to the outside of the stator seat (2) and serves as an inlet of the cooling channel (3); the other end of the second channel (3-2) is connected to the outside of the stator seat (2) and serves as an outlet of the cooling channel (3).

4. The stator with a cooling cavity of a scroll compressor according to claim 2, characterized in that: A plurality of arc-shaped protrusions (3-3) are arranged along the wall surfaces on both sides of the cooling channel (3), and adjacent arc-shaped protrusions (3-3) are arranged in a staggered manner.

5. The stator with a cooling cavity of a scroll compressor according to claim 4, characterized in that: The height of each arc-shaped protrusion (3-3) is H, the width of the cooling channel (3) is W, 6. The stator with a cooling chamber for a scroll compressor according to claim 2, characterized in that: A plurality of heat pipes (4) are embedded at intervals along a path on the wall surface of the second channel (3-2); one end of the heat pipe (4) is located in the involute stator disk (1), and the other end of the heat pipe (4) is located in the second channel (3-2); a refrigerant is provided in the heat pipe (4) for achieving temperature reduction through physical form conversion between the involute stator disk (1) and the second channel (3-2).

7. The stator with a cooling cavity of a scroll compressor according to claim 6, characterized in that: The heat pipe (4) comprises an evaporation section (4-3), a transition section (4-2) and a condensation section (4-1) which are connected in sequence; the evaporation section (4-3) is located in the involute stator disk (1) and is used to absorb heat from the involute stator disk (1); the condensation section (4-1) is located in the second channel (3-2); and a transition section (4-2) is provided between the evaporation section (4-3) and the condensation section (4-1) and is used to be connected to the stator seat (2).

8. The stator with a cooling cavity of a scroll compressor according to claim 6, characterized in that: The heat pipe (4) comprises a metal shell (4-4) and a capillary structure (4-5) arranged in the metal shell (4-4); the capillary structure (4-5) is filled with refrigerant, and the refrigerant flows back due to the action of capillary force; the outer surface of the metal shell (4-4) located in the second channel (3-2) has a concave-convex texture, which is used to improve heat dissipation efficiency.

9. A scroll compressor, characterized in that: A scroll compressor comprising a stator with a cooling cavity, an involute rotor (6) and a cooling medium circulation system as described in any one of claims 1 to 8, wherein the cooling medium circulation system is connected to a cooling channel (3), and the involute rotor (6) is connected to a power unit; the power unit is used to provide power to the cooling medium circulation system.

10. The scroll compressor according to claim 9, characterized in that: One output end of the power unit is connected to an involute rotor (6), and the other output end of the power unit is equipped with a flywheel (7), which is located in a cooling medium tank (8) and is used to pump the cooling medium tank (8) into the cooling channel (3).

Images