Orbiting scroll and compressor

Abstract

The invention provides an orbiting scroll and a compressor, the orbiting scroll comprises a base plate and a scroll wrap, the scroll wrap is arranged on the base plate, a groove is formed in the base plate, the groove penetrates through the base plate, a tooth head block is arranged in the groove, and the tooth head block can move in the groove in the axial direction of the base plate. According to the scroll compressor, the technical problem of low energy efficiency of the compressor caused by low opening rate of the exhaust passage of the pump body of the scroll compressor in the prior art can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular relates to a movable scroll and a compressor. Background Art

[0002] The scroll compressor compresses through the meshing of the moving and static scroll plates. The moving and static scroll plates divide the pump body into a crescent cavity. Under the rotation of the crankshaft, each crescent cavity begins to form and gradually becomes smaller. The meshing point of the moving and static plates will gradually move closer to the center and finally disengage. The refrigerant is discharged from the center of the pump body, completing the compression.

[0003] Whether the refrigerant can be discharged quickly after disengagement is a key factor affecting the energy efficiency of the compressor. Because the scroll pump body needs to have a specific pressure ratio, and the thickness of the profile tooth head cannot be too small, this leads to the flow area of ​​the scroll compressor's exhaust channel becoming smaller due to the increase in pressure ratio and the thickening of the tooth head, resulting in a lower exhaust rate in the pump body exhaust channel and a too low exhaust channel opening rate.

[0004] The existing scroll compressor profiles usually use solutions such as tooth head grooves and center grooves of the moving plate to solve the problem that the exhaust passage cannot be opened and enlarged quickly.

[0005] Since the opening rate of the exhaust passage of the pump body of the scroll compressor in the prior art is low, resulting in technical problems such as low energy efficiency of the compressor, the present invention studies and designs a movable scroll and a compressor. Summary of the invention

[0006] Therefore, the present invention provides a movable scroll and a compressor, which can solve the technical problem in the prior art that the exhaust passage opening rate of the pump body of the scroll compressor is low, resulting in low energy efficiency of the compressor.

[0007] In order to solve the above problems, the present invention provides a movable scroll, comprising: a base plate and a vortex tooth, the vortex tooth is arranged on the base plate, the base plate is provided with a groove, the groove passes through the base plate, a tooth head block is arranged in the groove, and the tooth head block can move in the groove along the axial direction of the base plate.

[0008] In some embodiments, the spiral tooth has a first end close to the center of the base plate, and the tooth head block profile is continuous with the first end profile.

[0009] In some embodiments, the groove is located at the center of the substrate, and the tooth head block has a sunken state and a raised state. When the tooth head block is in the sunken state, the tooth head block is misaligned with the scroll tooth along the axial direction of the substrate. When the tooth head block is in the raised state, the tooth head block is continuous with the scroll tooth profile.

[0010] In some embodiments, the tooth head block includes a tooth head and a fixing plate, the tooth head is disposed on the fixing plate, and the fixing plate matches the groove.

[0011] In some embodiments, the fixing plate is rectangular, and at least one side of the tooth head is located at a corner of the fixing plate.

[0012] In some embodiments, a first guide groove is provided at one end of the volute tooth close to the center of the substrate along the axial direction of the substrate, and a clamp is provided on the side of the tooth head facing the volute tooth, and the clamp can move in the first groove along the axial direction of the substrate.

[0013] In some embodiments, along the axial direction of the substrate, the inner side wall of the groove is provided with a second guide groove, the first guide groove is connected to the second guide groove, and the clamping member can move in the axial direction of the substrate in the second groove.

[0014] The present invention also provides a compressor, comprising the above-mentioned movable scroll.

[0015] In some embodiments, the compressor includes a crankshaft, the crankshaft is used to drive the movable scroll to rotate, and a protrusion is provided on one end of the crankshaft facing the movable scroll.

[0016] In some embodiments, the compressor includes a stationary scroll, and when the compressor is exhausted, the scroll tooth has a tooth head disengagement point of the stationary scroll, and the connection between the scroll tooth and the tooth head block is located at the disengagement point.

[0017] The movable scroll and compressor provided by the present invention have the following beneficial effects:

[0018] Through the axial direction of the substrate, the tooth head block can move in the groove. When the compressor pump body is compressed, the tooth head block moves upward along the axial direction of the substrate, so that the tooth head block cooperates with the vortex tooth to form a complete moving disk vortex tooth, thereby ensuring compression efficiency. When the compressor pump body is exhausted, the tooth head block moves downward along the axial direction of the substrate 2, and a height difference is formed between the tooth head block and the vortex tooth, thereby increasing the exhaust channel between the static disk and the moving disk, effectively increasing the exhaust efficiency and improving the energy efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] Figure 1 The structure of the movable scroll of the present invention is schematically shown in FIG. Figure 1 ;

[0021] Figure 2 The structure of the movable scroll of the present invention is schematically shown in FIG. Figure 2 ;

[0022] Figure 3 It is a structural schematic diagram of the tooth head block in the movable scroll of the present invention;

[0023] Figure 4 is a schematic structural diagram of a crankshaft in a compressor according to another embodiment of the present invention;

[0024] Figure 5 is a structural schematic diagram of a gear head block in a compressor in another embodiment of the present invention in a sinking state;

[0025] Figure 6 is a structural schematic diagram of a compressor in another embodiment of the present invention in a state where a tooth head block is lifted up;

[0026] Figure 7 It is a working schematic diagram of a compressor pump body in the prior art;

[0027] Figure 8 It is a schematic diagram of the operation when the inner cavity of the compressor pump body is about to be disengaged in the prior art;

[0028] Fig. 9 It is a schematic diagram of the operation when the inner cavity of the compressor pump body is disengaged by 90° in the prior art;

[0029] Fig.10 It is a schematic diagram of the operation when the inner cavity of the compressor pump body is disengaged 180 degrees in the prior art;

[0030] Fig.11 It is a schematic diagram of the operation of the compressor pump body in the prior art when the inner cavity is about to be exhausted;

[0031] Fig.12 It is a schematic diagram of the disengagement point of the gear head of the compressor pump body in the prior art;

[0032] Fig.13 This is a schematic diagram of the structure of the compressor pump exhaust in the prior art Figure 1 ;

[0033] Fig.14 This is a schematic diagram of the structure of the compressor pump exhaust in the prior art Figure 2 ;

[0034] Fig.15 The structure diagram of the pump exhaust in the compressor of another embodiment of the present invention is as follows Figure 1 ;

[0035] Fig.16The structure diagram of the pump exhaust in the compressor of another embodiment of the present invention is as follows Figure 2 ;

[0036] Fig.17 It is a comparison diagram of the sizes of the exhaust passages of a compressor according to another embodiment of the present invention and a pump body according to the prior art.

[0037] The accompanying drawings are marked as follows:

[0038] 1. Scroll tooth; 2. Base plate; 3. Tooth head block; 4. Tooth head; 5. Fixed plate; 6. Protrusion; 7. Crankshaft; 8. Groove. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0041] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0042] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0043] See also Figure 1-17 As shown, according to an embodiment of the present invention, a movable scroll is provided, comprising: a base plate 2 and a volute 1, wherein the volute 1 is arranged on the base plate 2, and a groove 8 is arranged on the base plate 2, wherein the groove 8 penetrates the base plate 2, and a tooth head block 3 is arranged in the groove 8, and the tooth head block 3 can move in the groove 8 along the axial direction of the base plate 2. In this technical solution, the tooth head block 3 can move in the groove 8 through the axial direction of the base plate 2, and when the compressor pump body is compressed, the tooth head block 3 moves upward along the axial direction of the base plate 2, so that the tooth head block 3 cooperates with the volute 1 to form a complete movable disk volute, thereby ensuring the compression efficiency, and when the compressor pump body is exhausted, the tooth head block 3 moves downward along the axial direction of the base plate 2, and a height difference is formed between the tooth head block 3 and the volute 1, thereby increasing the exhaust passage between the stationary disk and the movable disk, effectively increasing the exhaust efficiency, and improving the energy efficiency of the compressor.

[0044] Furthermore, the component formed by the tooth head block 3 and the moving plate scroll tooth 1 has a continuous wall surface and profile line. The tooth head block and the moving plate jointly complete the task of meshing the pump body. There is a groove 8 in the center of the base plate 2 that cooperates with the tooth head block 3 fixing plate 5, which can limit the rotational freedom of the tooth head block 3 along the base plate surface.

[0045] The tooth head block 3 has a fixed plate 5, on which there is a section of profile teeth, which is mainly composed of the outer profile and is continuous with the profile on the moving disk scroll tooth 1. The tooth head block 3 can move up and down under the action of the protrusion 6 of the crankshaft 7, thereby forming a certain exhaust passage. In other words, the tooth head block 3 separates the portion of the moving disk tooth head that only has the outer profile, and a small amount of the portion that has or does not have the inner profile from the moving disk as a whole, thereby forming a tooth head block structure.

[0046] In some embodiments, the volute 1 has a first end close to the center of the substrate 2, and the tooth head block 3 is continuous with the first end line. In this technical solution, the volute 1 has a first end close to the center of the substrate 2, and the tooth head block 3 is continuous with the first end line. That is to say, compared with the volute of the prior art, the structure of the movable scroll of the present invention is equivalent to dividing the existing volute head part, thereby widening the exhaust channel between the static disk and the movable disk when the compressor is exhausted, thereby improving the exhaust efficiency.

[0047] In some embodiments, the groove 8 is located at the center of the substrate 2, and the tooth head block 3 has a sunken state and a raised state. When the tooth head block 3 is in the sunken state, the tooth head block 3 is misaligned with the vortex tooth 1 along the axial direction of the substrate 2, and when the tooth head block 3 is in the raised state, the tooth head block 3 is continuous with the vortex tooth 1 profile. In this technical solution, when the tooth head block 3 is in the sunken state, that is, during exhaust, the tooth head block 3 is misaligned with the vortex tooth 1 along the axial direction of the substrate 2, thereby widening the exhaust channel between the static disk and the dynamic disk and improving the exhaust efficiency. When the tooth head block 3 is in the raised state, the tooth head block 3 is continuous with the vortex tooth 1 profile. Compared with the vortex teeth of the prior art, the structure of the movable scroll of the present invention is equivalent to dividing the existing vortex tooth head part. When the tooth head block 3 moves upward along the axial direction of the base plate 2, the tooth head block 3 cooperates with the vortex tooth 1 to form a complete movable disk vortex tooth, thereby ensuring compression efficiency.

[0048] In some embodiments, the tooth head block 3 includes a tooth head 4 and a fixing plate 5, the tooth head 4 is arranged on the fixing plate 5, and the fixing plate 5 matches the groove 8. In this technical solution, by matching the fixing plate 5 with the groove 8, when the pump body is compressed, the fixing plate 5 and the groove 8 form a closed fit, thereby ensuring the airtightness of the compression chamber and improving the compression efficiency.

[0049] In some embodiments, the fixing plate 5 is rectangular, and at least one side of the tooth head 4 is located at a corner of the fixing plate 5. In this technical solution, the fixing plate 5 is rectangular, that is, the groove 8 is also rectangular, and the four corners of the groove 8 are arc angles, and at least one side of the tooth head 4 is located at a corner of the fixing plate 5. When the tooth head block 3 moves up and down, one end of the tooth head 4 can form a guiding effect with a corner of the groove 8 to ensure the normal movement of the tooth head block 3.

[0050] In some embodiments, along the axial direction of the substrate 2, a first guide groove is provided at one end of the volute 1 close to the center of the substrate 2, and a clamp is provided on the side of the tooth head 4 facing the volute 1, and the clamp can move in the first groove along the axial direction of the substrate 2. In this technical solution, a first guide groove is provided at one end of the volute 1 close to the center of the substrate 2 along the axial direction of the substrate 2, and a clamp is provided on the side of the tooth head 4 facing the volute 1, and the clamp can move in the first groove along the axial direction of the substrate 2, that is, a sliding fit is formed between the clamp and the first guide groove, further ensuring the normal movement of the tooth head block 3.

[0051] In some embodiments, a second guide groove is provided on the inner side wall of the groove 8 along the axial direction of the substrate 2, the first guide groove is connected with the second guide groove, and the clamp can move in the second groove along the axial direction of the substrate 2. In this technical solution, the clamp can move in the second groove along the axial direction of the substrate 2 through the connection between the first guide groove and the second guide groove, and the tooth head block 3 can be guided by the first guide groove and the second guide groove while ensuring the displacement distance of the tooth head block.

[0052] The present invention also provides a compressor, comprising the above-mentioned movable scroll.

[0053] In some embodiments, the compressor includes a crankshaft 7, which is used to drive the movable scroll to rotate, and a protrusion 6 is provided at one end of the crankshaft 7 facing the movable scroll. In this technical solution, the top and bottom of the tooth head block 3 are realized by the protrusion 6. When the crankshaft 7 rotates to the point where the protrusion 6 is misaligned with the fixed plate 5, the tooth head block 3 moves downward at this time. When the crankshaft 7 rotates to the point where the protrusion 6 is opposite to the fixed plate 5, the tooth head block 3 moves upward at this time, that is, the protrusion 6 lifts the tooth head block 3. Further, the protrusion 6 can be an arc-shaped protrusion, that is, the protrusion 6 and the end surface of the crankshaft 7 have a smooth transition. The height of the protrusion 6 is determined according to the displacement distance of the tooth head block 3. It needs to be ensured that when the protrusion 6 lifts the tooth head block 3, the tooth head block 3 and the spiral tooth 1 profile are completely continuous.

[0054] Specifically, there is a smooth protrusion 6 above the eccentric portion of the crankshaft 7. When the protrusion 6 hits the movable plate tooth head block 3, the tooth top of the movable plate tooth head block 3 contacts the tooth bottom of the stationary plate.

[0055] In some embodiments, the compressor includes a stationary scroll. When the compressor is exhausted, the scroll tooth 1 has a tooth head disengagement point of the stationary scroll. The connection between the scroll tooth 1 and the tooth head block 3 is located at the disengagement point. Figures 7 to 14 As shown in the figure, when the compressor pump body is working, there is a disengagement point between the static plate and the dynamic plate. When exhausting, due to the existence of the tooth head, the gas needs to be discharged from the gap between the static plate and the dynamic plate tooth head. However, due to the pressure ratio requirement, the thickness of the tooth head needs to be guaranteed, which makes the gap between the static plate and the dynamic plate tooth head smaller, and the exhaust efficiency is too small. Figures 15 to 17 As shown, in the compressor of the present invention, when the compressor is exhausting, the tooth head block 3 moves downward, that is, the exhaust between the stator plate and the moving plate no longer passes through only the gap between the two, but also the space between the tooth head block 3 and the stator plate base plate, which further increases the exhaust channel and improves the exhaust efficiency.

[0056] The vortex pump body is composed of a moving and stationary disc that meshes with each other to achieve gas compression.

[0057] The moving disc moves in translation around the center of rotation with a certain eccentricity. The moving disc and the stationary disc mesh at multiple points, thus dividing the pump body into multiple crescent cavities. When a crescent cavity is formed, it will move inward with the translation of the moving disc. When the moving disc moves to a certain angle, the moving and stationary discs will disengage, such as the disengagement point of the inner cavity. The gas in the crescent cavity flows out from the gap between the teeth of the moving and stationary discs and reaches the exhaust port to complete the compression. Due to the different exhaust points of the inner and outer cavities, the outer cavity is usually exhausted first, and the inner cavity starts to exhaust after a certain angle after the outer cavity is exhausted. This is reflected in the longer outer profile of the moving and stationary discs.

[0058] The tooth head of the moving disk, which only has the outer profile, and a small amount of the inner profile or no inner profile, is separated from the moving disk as a whole to form the tooth head block 3. The profile of this part plays a meshing role between the tooth head block meshing point and the tooth head block disengagement point (outer cavity disengagement point), and does not mesh at other times.

[0059] When the moving disk is about to move to the meshing point of the tooth head block 3, the protrusion 6 on the top of the crankshaft 7 lifts the tooth head block 3, and the tooth head block 3 and the moving disk form a complete pump body. The profile on the moving disk continuously meshes with the stationary disk. When the moving disk runs to the disengagement point of the tooth head block 3, the protrusion 6 begins to drop until it disappears. Under the action of gravity, the tooth head block 3 begins to sink, thereby forming a larger tooth head exhaust channel. When the next round of meshing points approaches, the tooth head block 3 will again complete the meshing effect due to the protrusion 6 on the crankshaft 7, and the cycle repeats. A pump body with a wider exhaust channel can be quickly established, which can increase the exhaust rate and thus improve the energy efficiency of the compressor.

[0060] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A movable scroll, characterized in that: include: A substrate (2) and a volute (1), wherein the volute (1) is arranged on the substrate (2), a groove (8) is arranged on the substrate (2), the groove (8) passes through the substrate (2), a tooth head block (3) is arranged in the groove (8), and the tooth head block (3) can move in the groove (8) along the axial direction of the substrate (2).

2. The movable scroll according to claim 1, characterized in that: The volute tooth (1) has a first end close to the center of the base plate (2), and the profile of the tooth head block (3) is continuous with the profile of the first end.

3. The movable scroll according to claim 1, characterized in that: The groove (8) is located at the center of the base plate (2), and the tooth head block (3) has a sunken state and a raised state. When the tooth head block (3) is in the sunken state, the tooth head block (3) is misaligned with the volute tooth (1) along the axial direction of the base plate (2); when the tooth head block (3) is in the raised state, the tooth head block (3) is continuous with the volute tooth (1) profile.

4. The movable scroll according to claim 1, characterized in that: The tooth head block (3) comprises a tooth head (4) and a fixing plate (5); the tooth head (4) is arranged on the fixing plate (5); and the fixing plate (5) matches the groove (8).

5. The movable scroll according to claim 4, characterized in that: The fixing plate (5) is rectangular, and at least one side of the tooth head (4) is located at a corner of the fixing plate (5).

6. The movable scroll according to claim 4, characterized in that: Along the axial direction of the substrate (2), a first guide groove is provided at one end of the volute (1) close to the center of the substrate (2), and a clamp is provided on the side of the tooth head (4) facing the volute (1), and the clamp can move in the first groove along the axial direction of the substrate (2).

7. The movable scroll according to claim 6, characterized in that: Along the axial direction of the substrate (2), the inner side wall of the groove (8) is provided with a second guide groove, the first guide groove is connected to the second guide groove, and the clamping member can move along the axial direction of the substrate (2) in the second groove.

8. A compressor, characterized in that: The movable scroll comprises the movable scroll according to any one of claims 1 to 7.

9. The compressor according to claim 8, characterized in that: The compressor comprises a crankshaft (7) which is used to drive the movable scroll to rotate. A protrusion (6) is provided on one end of the crankshaft (7) facing the movable scroll.

10. The compressor according to claim 8, characterized in that: The compressor comprises a stationary scroll. When the compressor is exhausted, the scroll tooth (1) has a tooth head disengagement point of the stationary scroll. The connection between the scroll tooth (1) and the tooth head block (3) is located at the disengagement point.

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