Scrolls, scroll assemblies, compressors and refrigeration equipment

Abstract

This invention provides a moving scroll, a scroll assembly, a compressor, and a refrigeration device. The moving scroll includes a moving scroll base plate body, moving scroll teeth, and a bearing housing. The moving scroll base plate body has a first base plate side and a second base plate side opposite to each other in the axial direction of the moving scroll base plate body. The moving scroll teeth are disposed on the first base plate side, and the bearing housing protrudes outward from the second base plate side. The moving scroll also has a central base plate located at the center of the moving scroll base plate body, on the side of the moving scroll base plate body closest to the first base plate side. The central base plate is disposed at one end of the bearing housing and forms a bearing mounting cavity with the inner peripheral wall of the bearing housing. The distance between the side of the central base plate facing the bearing mounting cavity and the highest point of the moving scroll teeth is less than the distance between the side of the first base plate and the highest point of the moving scroll teeth. By raising the central base plate, this moving scroll reduces the tooth height in the exhaust cavity, thereby reducing the overturning moment of the moving scroll and improving the operational reliability of the compressor.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to a moving scroll, a scroll assembly, a compressor, and a refrigeration device. Background Technology

[0002] Scroll compressors, as efficient and compact compression devices, are widely used in air conditioning and other refrigeration equipment. Scroll compressors achieve gas compression through the meshing motion of a moving scroll and a stationary scroll, offering advantages such as leak-free operation, low noise, and high efficiency. However, with the continuous improvement of compressor speed and efficiency, their dynamic characteristics and structural strength face greater challenges, especially the design of the moving and stationary scrolls, which plays a crucial role in the overall performance of the compressor.

[0003] See Figure 1 Currently, commonly used scroll compressor pump body structures often employ a combination of equal tooth height and tooth root step difference to achieve lubrication and sealing. The combination of equal tooth height and tooth root step difference results in a uniform thickness of the base plate 101 of the moving scroll. This structure causes the entire bearing housing 102 and the entire bearing mounting cavity 104 of the moving scroll to protrude below the base plate 101, causing the moving scroll to bear the overturning moment generated by the eccentricity of the bearing housing 102. In other words, the force on the entire bearing housing 102 will exert an overturning moment on the moving scroll, which will cause significant damage to the stable operation of the moving scroll. The overturning moment not only causes external leakage in the compression cavity 103 but also causes wear on the base plate 101. Long-term operation will inevitably reduce the reliability and service life of the compressor and seriously affect the operational stability. Utility Model Content

[0004] The primary objective of this invention is to provide a moving scroll that, by raising the central base plate, reduces the tooth height in the exhaust chamber, thereby reducing the overturning torque on the moving scroll and improving the operational reliability of the compressor.

[0005] The second objective of this invention is to provide a scroll assembly employing the aforementioned moving scroll.

[0006] The third objective of this invention is to provide a compressor employing the aforementioned moving scroll.

[0007] The fourth objective of this invention is to provide a refrigeration device employing the aforementioned compressor.

[0008] To achieve the aforementioned first objective, this utility model provides a moving scroll, comprising a moving scroll base body, moving scroll teeth, and a bearing housing; the moving scroll base body is provided with a first substrate side and a second substrate side opposite to each other in the axial direction of the moving scroll base body; the moving scroll teeth are disposed on the first substrate side and protrude from the first substrate side in a direction away from the second substrate side; the bearing housing protrudes from the second substrate side in a direction away from the first substrate side, and a bearing mounting cavity is provided inside the bearing housing; the moving scroll also provides a central substrate, which is located at the center of the moving scroll base body in the radial direction and is located on the side of the moving scroll base body closer to the first substrate side; the central substrate is disposed at one end of the bearing housing and forms a bearing mounting cavity with the inner peripheral wall of the bearing housing; the distance between the side of the central substrate facing the bearing mounting cavity and the highest point of the moving scroll teeth is less than the distance between the side of the first substrate and the highest point of the moving scroll teeth.

[0009] As can be seen from the above scheme, in the prior art, the upper surface of the central base plate is at the same height as the upper surface of the moving plate base body, the bearing seat is set on the lower surface of the moving plate base body, and the bearing mounting cavity is located in the bearing seat and extends downward from the lower surface of the moving plate base body. Therefore, after the crankshaft of the compressor is installed in conjunction with the bearing mounting cavity, during the operation of the compressor, the force on the entire bearing seat will apply an overturning moment to the moving plate. This will cause significant damage to the smooth operation of the moving plate. Overturning will cause leakage from the moving plate compression cavity and wear of the base plate. Over time, this will inevitably affect the reliability and lifespan of the compressor.

[0010] The force on the moving scroll mainly comes from the gas pressure in the compression chamber. However, by raising the central base plate, the pressure on both sides of the moving scroll acts directly on the bearings without bearing bending moment. The moving scroll structure with the central base plate raised reduces the center tooth height of the moving and stationary scrolls, and the shaft system moves upward relative to the base plate. The bearing force-bearing surface of the moving scroll extends into the interior of the moving scroll, which reduces the force arm of the moving scroll and helps to reduce overturning. Furthermore, this design makes the moving scroll structure more compact and reduces the volume of the oil sump in the upper support, making it easier for the oil sump to fill under low-frequency conditions, which helps to improve the performance of the compressor under low-frequency operating conditions.

[0011] A preferred embodiment is that, in the helical extension direction of the moving disk volute, the end of the moving disk volute is located on the central substrate.

[0012] Therefore, by raising the central base plate, the tooth height in the exhaust chamber is reduced, and the bearing mounting cavity extends into the moving scroll, significantly shortening the length of the bearing housing protruding from the main body of the moving scroll base plate. This reduces the lever arm of the moving scroll, which helps to reduce overturning. Simultaneously, with the central base plate raised, the force of the crankshaft crank driving the moving scroll to rotate will act directly on the base plate without generating additional overturning torque. Similarly, when the moving scroll's central cavity is subjected to the force of compressed gas, its maximum lever arm is reduced from H to h, effectively mitigating the overturning phenomenon of the moving scroll.

[0013] A preferred embodiment is that the center of mass of the moving scroll is located on the central axis of the moving scroll base plate body and within the bearing mounting cavity, with the center of mass close to the central base plate.

[0014] A preferred embodiment is that the thickness of the central substrate is less than the thickness of the moving disk substrate body.

[0015] To achieve the second objective mentioned above, this utility model provides a scroll assembly, including a stationary scroll and the aforementioned moving scroll that cooperate with each other.

[0016] A preferred embodiment is that the stationary scroll plate includes a stationary scroll plate body and stationary scroll teeth; the stationary scroll plate and the moving scroll plate are arranged opposite each other along the axial direction of the scroll plate assembly, and the stationary scroll teeth are arranged on the side of the stationary scroll plate body facing the moving scroll plate and cooperate with the moving scroll teeth to form a compression cavity.

[0017] A further option is to provide a recess at the end of the stationary disk volute tooth near the central axis of the stationary disk in the spiral extension direction of the stationary disk volute tooth, and the recess cooperates with the central substrate.

[0018] It can be seen that by providing a recess at the end of the stationary disk scroll tooth to cooperate with the central base plate of the moving disk, the end of the stationary disk scroll tooth can be guaranteed to cooperate with the end of the moving disk scroll tooth.

[0019] A further embodiment is that, in the axial direction of the moving disk substrate body, the recess is recessed from the end face of the stationary disk volute tooth away from the central substrate towards the central substrate; the recess penetrates the stationary disk volute tooth in the thickness direction; and the recess extends inward from the end of the stationary disk volute tooth along the spiral extension direction of the stationary disk volute tooth.

[0020] To achieve the third objective mentioned above, this utility model provides a compressor, including a bearing, a crankshaft, and the aforementioned scroll assembly. The bearing is installed in the bearing mounting cavity, and the crankshaft is connected to the moving scroll through the bearing.

[0021] In a preferred embodiment, the end wall of the top of the crankshaft is higher than the side of the first substrate.

[0022] Therefore, ensuring that the top of the crankshaft extends into the interior of the moving scroll and extends above the main body of the moving scroll base plate reduces the lever arm of the moving scroll.

[0023] A further embodiment is that the compressor also includes an upper bracket; the upper bracket is fixedly connected to the stationary scroll, and the moving scroll is located in the space enclosed by the upper bracket and the stationary scroll; the upper bracket has an upper bracket oil sump, and the crankshaft passes through the upper bracket oil sump and connects to the moving scroll; the peripheral wall of the upper bracket oil sump, the bottom wall of the upper bracket oil sump, the side of the second base plate of the moving scroll, the outer peripheral wall of the bearing housing, the end wall of the bearing housing, and the crankshaft enclose a lubricating oil receiving cavity.

[0024] It can be seen that after the moving disk center base plate moves upward, the volume of the upper support oil sump decreases, which is conducive to filling the oil sump under low-frequency conditions, and then entering the back pressure cavity through the PTFE sealing ring. The upper end of the crankshaft is ΔH higher than the upper surface of the moving disk base plate body, and its centrifugal force can be directly transmitted to the moving disk base plate body of the moving scroll through the bearing, which greatly reduces the overturning.

[0025] To achieve the fourth objective mentioned above, this utility model provides a refrigeration device, including the compressor described above. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of an existing moving scroll.

[0027] Figure 2 This is a cross-sectional view of an embodiment of the compressor of this utility model.

[0028] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0029] Figure 4 This is a structural diagram of the moving scroll in an embodiment of the compressor of this utility model.

[0030] Figure 5 yes Figure 4 A magnified view of a section at point B.

[0031] Figure 6 This is a cross-sectional view of the moving scroll in an embodiment of the compressor of this utility model.

[0032] Figure 7 This is a structural diagram of the stationary scroll plate in an embodiment of the compressor of this utility model.

[0033] Figure 8 yes Figure 7 A magnified view of a section at point C.

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present invention or its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0036] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not exist between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0038] All terms used in this invention (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0039] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0040] The refrigeration equipment in this embodiment is an air conditioner, which includes a compressor.

[0041] See Figure 2 and Figure 3 The compressor includes a bearing 1, a crankshaft 2, a scroll assembly 3, an upper bracket 4, a cross-slip ring 5, and a sealing ring 6. The scroll assembly 3 includes a stationary scroll 7 and a moving scroll 8 that cooperate with each other. The upper bracket 4 is fixedly connected to the stationary scroll 7. The moving scroll 8 is located within the space enclosed by the upper bracket 4 and the stationary scroll 7. The cross-slip ring 5 and the sealing ring 6 are also located within this space. The cross-slip ring 5 is sleeved on the outside of the crankshaft and located between the moving scroll 8 and the upper bracket 8. The upper bracket 4 has an upper bracket oil sump 41. The crankshaft 2 passes through the upper bracket oil sump 41 and connects to the moving scroll 8. The sealing ring 6 is located at the top of the upper bracket oil sump 41 and is positioned at the contact point between the upper bracket 4 and the moving scroll 8.

[0042] See Figures 2 to 6The moving scroll 8 includes a moving scroll base body 81, moving scroll teeth 82, and a bearing seat 83. The moving scroll base body 81 has a first substrate side surface 811 and a second substrate side surface 812 that are axially opposite to each other. The moving scroll teeth 82 are disposed on the first substrate side surface 811 and protrude from the first substrate side surface 811 in a direction away from the second substrate side surface 812. The bearing seat 83 protrudes from the second substrate side surface 812 in a direction away from the first substrate side surface 811. A bearing mounting cavity 84 is provided inside the bearing seat 83, and a bearing 1 is installed in the bearing mounting cavity 84. The crankshaft 2 is connected to the moving scroll 8 via the bearing 1. The end wall 21 at the top of the crankshaft 2 is higher than the first substrate side surface 811, with a height difference of ΔH, to ensure that the top of the crankshaft 2 extends into the moving scroll 8 and extends above the moving scroll base body 81, thereby reducing the force arm of the moving scroll 8.

[0043] The moving scroll 8 also includes a central base plate 85, which is located at the radial center of the moving scroll base plate body 81. Both the central base plate 85 and the moving scroll base plate body 81 are disk-shaped and coaxially arranged. The central base plate 85 is located on the side of the moving scroll base plate body 81 near the side 811 of the first base plate. The central base plate 85 is disposed at one end of the bearing seat 83 and forms a bearing mounting cavity 84 with the inner peripheral wall of the bearing seat 83. The distance H1 between the side 851 of the central base plate 85 facing the bearing mounting cavity 84 and the highest point of the moving scroll tooth 82 is less than the distance H between the side 811 of the first base plate and the highest point of the moving scroll tooth 82. In the helical extension direction of the moving scroll tooth 82, the end of the moving scroll tooth 82 is located on the central base plate 85. The center of mass 80 of the moving scroll 8 is located on the central axis of the moving scroll base plate body 81 and within the bearing mounting cavity 84, with the center of mass close to the central base plate 85. The thickness of the central base plate 85 is less than the thickness of the moving scroll base plate body 81. By raising the central base plate 85, the tooth height in the exhaust chamber 852 is reduced, and the bearing mounting cavity 84 extends into the moving scroll 8. This significantly shortens the length of the bearing seat 83 protruding from the moving scroll base plate body 81, reducing the lever arm of the moving scroll 8 and thus mitigating overturning. Simultaneously, with the central base plate 85 raised, the force of the crankshaft 2 driving the moving scroll 8 to rotate will act directly on the central base plate 85 without generating additional overturning torque. Similarly, when the central cavity of the moving scroll 8 is subjected to the force of compressed gas, its maximum lever arm is reduced from H to h, effectively alleviating the overturning phenomenon of the moving scroll 8.

[0044] See Figure 2 , Figure 7 and Figure 8The stationary scroll 7 and the moving scroll 8 are arranged opposite each other along the axial direction of the scroll assembly 3. The stationary scroll 7 includes a stationary base plate body 71 and stationary scroll teeth 72. The stationary scroll teeth 72 are disposed on the side of the stationary base plate body 71 facing the moving scroll 8 and cooperate with the moving scroll teeth 82 to form a compression cavity 30. In the helical extension direction of the stationary scroll teeth 72, a recess 721 is provided at the end of the stationary scroll teeth 72 near the central axis of the stationary scroll 7, and the recess 721 cooperates with the central base plate 85. In the axial direction of the moving base plate body 81, the recess 721 is recessed from the end face of the stationary scroll teeth 72 away from the central base plate 85 towards the central base plate 85. The recess 721 penetrates the stationary scroll teeth 72 in the thickness direction of the stationary scroll teeth 72 and extends inward from the end of the stationary scroll teeth 72 along the helical extension direction of the stationary scroll teeth 72. By providing a recess 721 at the end of the stationary disk scroll tooth 72 to cooperate with the center base plate 85 of the moving disk, it is ensured that the end of the stationary disk scroll tooth 72 can cooperate with the end of the moving disk scroll tooth 82.

[0045] like Figure 3 As shown, the peripheral wall 411 of the upper support oil sump 41, the bottom wall 412 of the upper support oil sump 41, the side surface 812 of the second base plate of the moving scroll 8, the outer peripheral wall 831 of the bearing seat 83, the end wall 832 of the bearing seat 83, and the crankshaft 2 form a lubricating oil receiving cavity 40. After the central base plate 85 of the moving scroll 8 moves upward, the height of the bearing seat 83 protruding from the side surface 812 of the second base plate decreases, thereby reducing the volume of the lubricating oil receiving cavity 40. This is beneficial for filling the oil sump under low-frequency operating conditions. Then, the lubricating oil enters the back pressure cavity 86 of the moving scroll 8 through the PTFE sealing ring 6. The upper end of the crankshaft 2 is ΔH higher than the upper surface of the moving scroll base plate body 81. Its centrifugal force can be directly transmitted to the moving scroll base plate body 81 of the moving scroll 8 through the bearing 1, which greatly reduces the overturning.

[0046] As can be seen from the above, in the prior art, the upper surface of the central base plate is at the same height as the upper surface of the moving plate base body, the bearing housing is set on the lower surface of the moving plate base body, and the bearing mounting cavity is located inside the bearing housing and extends downward from the lower surface of the moving plate base body. Therefore, after the crankshaft of the compressor is installed in conjunction with the bearing mounting cavity, during the operation of the compressor, the force on the entire bearing housing will apply an overturning moment to the moving plate. This will cause significant damage to the smooth operation of the moving plate. Overturning will cause leakage from the compression cavity of the moving plate and wear of the base plate. Over time, this will inevitably affect the reliability and lifespan of the compressor.

[0047] The force on the moving scroll mainly comes from the gas pressure in the compression chamber. However, by raising the central base plate, the pressure on both sides of the moving scroll acts directly on the bearings without bearing bending moment. The moving scroll structure with the central base plate raised reduces the center tooth height of the moving and stationary scrolls, and the shaft system moves upward relative to the base plate. The bearing force-bearing surface of the moving scroll extends into the interior of the moving scroll, which reduces the force arm of the moving scroll and helps to reduce overturning. Furthermore, this design makes the moving scroll structure more compact and reduces the volume of the oil sump in the upper support, making it easier for the oil sump to fill under low-frequency conditions, which helps to improve the performance of the compressor under low-frequency operating conditions.

[0048] Finally, it should be emphasized that the above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A moving scroll, comprising a moving scroll base body, moving scroll teeth, and bearing housing; The moving disk substrate body is provided with a first substrate side and a second substrate side opposite to each other in the axial direction of the moving disk substrate body. The moving disk spiral tooth is provided on the first substrate side and protrudes from the first substrate side in a direction away from the second substrate side. The bearing seat protrudes from the second substrate side in a direction away from the first substrate side. The bearing seat is provided with a bearing mounting cavity. Its features are: The moving scroll is also provided with a central base plate, which is located at the center of the moving scroll base plate body in the radial direction and is located on the side of the moving scroll base plate body close to the side of the first base plate. The central base plate is disposed at one end of the bearing housing and together with the inner peripheral wall of the bearing housing forms the bearing mounting cavity. The distance between the side of the central substrate facing the bearing mounting cavity and the highest point of the moving disk scroll tooth is less than the distance between the side of the first substrate and the highest point of the moving disk scroll tooth.

2. The moving scroll plate according to claim 1, characterized in that: In the helical extension direction of the moving disk volute, the end of the moving disk volute is located on the central substrate.

3. The moving scroll plate according to claim 1 or 2, characterized in that: The center of mass of the moving scroll is located on the central axis of the moving scroll base plate body and within the bearing mounting cavity, with the center of mass close to the central base plate.

4. The moving scroll plate according to claim 1 or 2, characterized in that: The thickness of the central substrate is less than the thickness of the moving disk substrate body.

5. A scroll assembly, characterized in that, It includes a stationary scroll plate that cooperates with each other and a moving scroll plate as described in any one of claims 1 to 4.

6. The scroll assembly according to claim 5, characterized in that: The stationary vortex disk includes a stationary disk substrate body and stationary disk vortex teeth; The stationary volute and the moving volute are arranged opposite each other along the axial direction of the volute assembly. The stationary volute teeth are arranged on the side of the stationary volute substrate body facing the moving volute and cooperate with the moving volute teeth to form a compression cavity.

7. The scroll assembly according to claim 6, characterized in that: In the helical extension direction of the stationary disk volute teeth, a recess is provided at the end of the stationary disk volute teeth near the central axis of the stationary disk, and the recess cooperates with the central base plate.

8. The scroll assembly according to claim 7, characterized in that: In the axial direction of the moving disk substrate body, the recess is recessed from the end face of the stationary disk volute tooth away from the central substrate toward the central substrate. The recess penetrates the stationary disk volute tooth in the thickness direction; The recess extends inward from the end of the stationary disk volute along the spiral extension direction of the stationary disk volute.

9. A compressor, characterized in that, It includes a bearing, a crankshaft, and a scroll assembly as described in any one of claims 5 to 8, wherein the bearing is mounted in the bearing mounting cavity, and the crankshaft is connected to the moving scroll via the bearing.

10. The compressor according to claim 9, characterized in that: The end wall at the top of the crankshaft is higher than the side of the first substrate.

11. The compressor according to claim 9 or 10, characterized in that: The compressor also includes an upper bracket; The upper support is fixedly connected to the stationary vortex disk, and the moving vortex disk is located within the space enclosed by the upper support and the stationary vortex disk; The upper support has an upper support oil sump. The crankshaft passes through the upper support oil sump and is connected to the moving scroll. The peripheral wall of the upper support oil sump, the bottom wall of the upper support oil sump, the side of the second base plate of the moving scroll, the outer peripheral wall of the bearing seat, the end wall of the bearing seat, and the crankshaft form a lubricating oil receiving cavity.

12. A refrigeration device, characterized in that, Includes the compressor as described in any one of claims 9 to 11.

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