A heat dissipation structure for a scroll compressor

Abstract

The present invention discloses a heat dissipation structure for a scroll compressor, which includes a stationary disk, a moving disk connected in cooperation, and a motor shaft for driving the rotation of the moving disk. A heat dissipation part is sleeved on the motor shaft; the heat dissipation part includes a fan blade sleeved on the motor shaft. The fan blade is located on the side of the moving disk away from the stationary disk. The fan blade is slidably connected to the motor shaft in the axial direction. A circumferential driving structure for driving the fan blade to rotate by the motor shaft is provided between the motor shaft and the fan blade. In the present invention, a fan blade is provided on the back of the moving disk, and a ball is provided between the fan blade and the moving disk. When the fan blade rotates at a high speed by the motor shaft, lift force will be generated, and the direction of this lift force is opposite to the direction of the axial gas force acting on the moving disk in the compression chamber, so that the axial force of the moving disk can be effectively reduced; at the same time, the fan blade is equivalent to an exhaust fan, which will discharge the heat on the back of the moving disk, thus playing a very good cooling effect on the moving scroll disk.

Description

Technical Field

[0001] The present invention relates to the technical field of scroll compressors, and specifically to a heat dissipation structure for a scroll compressor. Background Art

[0002] A scroll compressor mainly consists of a moving disk and a stationary disk. The stationary disk is fixed, and the moving disk performs a rotational translation under the combined action of a motor and an anti-rotation structure. During the operation of the compressor, the moving disk will move away from the stationary disk under the action of gas force, thereby increasing the axial and radial leakage, and at the same time increasing the normal pressure between the moving disk and the bracket, resulting in increased wear between the moving disk and the bracket. The existing patent is to set a back pressure chamber on the back of the moving disk, and introduce the high-pressure gas in the compression chamber into the back pressure chamber on the back of the moving disk to offset a part of the axial gas force. However, this solution is more suitable for a closed scroll compressor and is not suitable for an open scroll compressor, such as a scroll air compressor.

[0003] Most of the existing heat dissipation methods for compressors place a fan outside the scroll disk to blow air towards the scroll disk, or there are fan blades at the tail of the motor to blow towards the motor and the scroll disk, but these methods cannot reduce the axial force of the moving disk. Summary of the Invention

[0004] The purpose of the present invention is to provide a heat dissipation structure for a scroll compressor to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A heat dissipation structure for a scroll compressor, including a stationary disk, a moving disk, and a motor shaft for driving the rotation of the moving disk, which are cooperatively connected, and a heat dissipation part is sleeved on the motor shaft;

[0007] The heat dissipation part includes fan blades sleeved on the motor shaft. The fan blades are located on the side of the moving disk away from the stationary disk. The fan blades are slidably connected to the motor shaft in the axial direction, and a circumferential driving structure for driving the fan blades to rotate by the motor shaft is provided between the motor shaft and the fan blades.

[0008] As a further solution of the present invention: One end of the stationary disk close to the moving disk is fixedly connected with a bracket. The moving disk is movably connected to the bracket. One end of the bracket away from the stationary disk is fixedly connected with a motor, and the output end of the motor is the motor shaft.

[0009] As a further solution of the present invention: The fan blades include a frustum of a cone and blades arranged outside the frustum of the cone. The motor shaft passes through the middle of the frustum of the cone, and a sliding part is provided between the frustum of the cone and the moving disk.

[0010] As a further solution of the present invention: The sliding part includes a first ball groove located on the side of the moving disk close to the frustum, and a second ball groove arranged on the side of the frustum close to the moving disk. A ball is provided between the first ball groove and the second ball groove.

[0011] As a further solution of the present invention: There are at least four balls. The width of the first ball groove is not less than the sum of the diameter of the ball and twice the eccentricity of the moving disk. The second ball groove is of an annular structure.

[0012] As a further solution of the present invention: A circular hole is coaxially arranged in the middle of the frustum. The motor shaft is inserted into the circular hole, and the motor shaft is in clearance fit with the circular hole.

[0013] As a further solution of the present invention: At least one first limiting plane is provided on the inner side of the circular hole. The first limiting plane protrudes from the inner wall of the circular hole. At least one second limiting plane cooperating with the first limiting plane is provided on the motor shaft. The second limiting plane is recessed radially inward on the side surface of the motor shaft.

[0014] As a further solution of the present invention: The side of the fan blade close to the moving disk is the air inlet end, and the side of the fan blade far from the moving disk is the air outlet end.

[0015] As a further solution of the present invention: A balance weight is sleeved on the motor shaft. The balance weight is located on the side of the fan blade far from the moving disk.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing a fan blade on the back of the moving disk in the present invention, and there are balls between the fan blade and the moving disk. When the fan blade rotates at a high speed along with the motor shaft, a lifting force will be generated. This lifting force is opposite to the direction of the axial gas force acting on the moving disk in the compression chamber, so that the axial force of the moving disk can be effectively reduced. At the same time, the fan blade is equivalent to an exhaust fan, which can discharge the heat on the back of the moving disk, thus playing a good cooling effect on the moving scroll disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the scroll compressor in this embodiment;

[0018] Figure 2 It is a schematic structural view of the back of the moving disk in this embodiment;

[0019] Figure 3 It is a schematic structural view of the fan blade in this embodiment;

[0020] Figure 4 It is a schematic assembly view of the fan blade and the ball in this embodiment;

[0021] Figure 5 It is a schematic structural view of the motor shaft in this embodiment;

[0022] In the figure: 1 - static disk, 2 - moving disk, 21 - first ball groove, 3 - bracket, 4 - ball, 5 - fan blade, 51 - frustum, 52 - blade, 53 - circular hole, 54 - first limiting plane, 55 - second ball groove, 6 - balance weight, 7 - motor shaft, 71 - second limiting plane, 8 - motor. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-5 , in the embodiment of the present invention, a heat dissipation structure of a scroll compressor includes a static disk 1, a moving disk 2 which are cooperatively connected, and a motor shaft 7 for driving the moving disk 2 to rotate. One end of the static disk 1 close to the moving disk 2 is fixedly connected with a bracket 3. The moving disk 2 is movably connected with the bracket 3. One end of the bracket 3 far from the static disk 1 is fixedly connected with a motor 8. The output end of the motor 8 is the motor shaft 7. A balance weight 6 is sleeved on the motor shaft 7, and the balance weight 6 is arranged at one end close to the motor 8.

[0025] A heat dissipation part is sleeved on the motor shaft 7. The heat dissipation part includes a fan blade 5 sleeved on the motor shaft 7. The fan blade 5 is located on the side of the moving disk 2 far from the static disk 1. The side of the fan blade 5 close to the moving disk 2 is the air inlet end, and the side of the fan blade 5 far from the moving disk 2 is the air outlet end. The rotating fan blade 5 is used for forced ventilation and heat dissipation of the scroll compressor. The fan blade 5 includes a frustum 51 and blades 52 arranged outside the frustum 51. The motor shaft 7 passes through the middle of the frustum 51. A sliding part is arranged between the frustum 51 and the moving disk 2. The sliding part includes a first ball groove 21 on the side of the moving disk 2 close to the frustum 51 and a second ball groove 55 arranged on the side of the frustum 51 close to the moving disk 2. A ball 4 is arranged between the first ball groove 21 and the second ball groove 55. There are at least four balls 4. The width of the first ball groove 21 is not less than the sum of the diameter of the ball 4 and twice the eccentricity of the moving disk. The second ball groove 55 is of an annular structure.

[0026] The fan blade 5 is slidably connected to the motor shaft 7 in the axial direction. A circumferential driving structure for driving the fan blade 5 to rotate by the motor shaft 7 is provided between the motor shaft 7 and the fan blade 5. In this embodiment, a circular hole 53 is coaxially arranged in the middle of the frustum 51, and the motor shaft 7 is inserted into the circular hole 53. The motor shaft 7 and the circular hole 53 are in clearance fit, so as to ensure that the fan blade 5 can slide along the axial direction on the motor shaft 7. At least one first limiting plane 54 is provided inside the circular hole 53, and the first limiting plane 54 protrudes from the inner wall of the circular hole. At least one second limiting plane 71 that cooperates with the first limiting plane 54 is provided on the motor shaft 7. The second limiting plane 71 is recessed radially inward on the side surface of the motor shaft 7, so as to prevent the fan blade 5 from rotating relative to the motor shaft 7.

[0027] When the present invention is in use, the second ball groove 55 on the fan blade 5, the ball 4, and the first ball groove 21 on the moving disk 2 form a simple thrust ball bearing structure, which can not only meet the rotational translation of the moving disk 2 but also meet the high-speed rotation of the fan blade 5, and combines these two different motion forms well; during the high-speed rotation of the fan blade 5, under the action of the gas force, the fan blade 5 will move along the plane of the shaft towards the moving disk 2 and continuously provide a lift force to the moving disk 2. The direction of this lift force is opposite to the direction of the axial force inside the moving disk 2, so as to effectively reduce the gas axial force of the moving disk; at the same time, when the fan blade 5 rotates at high speed, a negative pressure will be generated on the back of the moving disk 2, and the heat on the back of the moving disk will be adsorbed and blown towards the balance weight 6 and the motor 8 with the air, while the surrounding cold air will converge to the back of the moving disk 2 under the action of the atmospheric pressure, so as to effectively dissipate heat from the moving disk 2. The traditional fan actively blows cold air towards the scroll disk to cool the scroll disk. The fan blade in this embodiment is equivalent to an exhaust fan, which adsorbs and discharges the heat on the back of the moving disk and passively dissipates heat from the moving disk by using the principle of high-pressure flowing to low-pressure due to the pressure difference.

[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0029] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heat dissipation structure for a scroll compressor, comprising a stationary disk (1), a moving disk (2) which are cooperatively connected, and a motor shaft (7) for driving the rotation of the moving disk (2), characterized in that, A heat dissipation part is sleeved on the motor shaft (7); The heat dissipation part includes a fan blade (5) sleeved on the motor shaft (7). The side of the fan blade (5) close to the moving disk (2) is the air inlet end, and the side of the fan blade (5) far from the moving disk (2) is the air outlet end. The fan blade (5) is located on the side of the moving disk (2) far from the static disk (1). The fan blade (5) is slidably connected to the motor shaft (7) in the axial direction. A circumferential driving structure for driving the fan blade (5) to rotate by the motor shaft (7) is provided between the motor shaft (7) and the fan blade (5); One end of the static disk (1) close to the moving disk (2) is fixedly connected with a bracket (3). The moving disk (2) is movably connected to the bracket (3). One end of the bracket (3) far from the static disk (1) is fixedly connected with a motor (8). The output end of the motor (8) is the motor shaft (7); The fan blade (5) includes a frustum (51) and blades (52) arranged outside the frustum (51). The motor shaft (7) passes through the middle of the frustum (51). A sliding part is provided between the frustum (51) and the moving disk (2). A circular hole (53) is coaxially arranged in the middle of the frustum (51). The motor shaft (7) is inserted into the circular hole (53), and the motor shaft (7) and the circular hole (53) are in clearance fit.

2. The heat dissipation structure for a scroll compressor according to claim 1, characterized in that, The sliding part includes a first ball groove (21) on the side of the moving disk (2) close to the frustum (51) and a second ball groove (55) arranged on the side of the frustum (51) close to the moving disk (2). A ball (4) is provided between the first ball groove (21) and the second ball groove (55).

3. The heat dissipation structure for a scroll compressor according to claim 2, characterized in that, At least four balls (4) are provided. The width of the first ball groove (21) is not less than the sum of the diameter of the ball (4) and twice the eccentricity of the moving disk. The second ball groove (55) is of an annular structure.

4. The heat dissipation structure for a scroll compressor according to claim 1, characterized in that, At least one first limiting plane (54) is provided on the inner side of the circular hole (53). The first limiting plane (54) protrudes from the inner wall of the circular hole. At least one second limiting plane (71) cooperating with the first limiting plane (54) is provided on the motor shaft (7). The second limiting plane (71) is concavely formed radially on the side surface of the motor shaft (7).

5. The heat dissipation structure for a scroll compressor according to claim 1, characterized in that, A balance weight (6) is sleeved on the motor shaft (7). The balance weight (6) is located on the side of the fan blade (5) far from the moving disk (2).

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