Pump body structure, scroll compressor and air conditioner

Abstract

This invention provides a pump body structure, a scroll compressor, and an air conditioner. The pump body structure includes a stationary disc, a moving disc, and a support. The stationary disc and the moving disc form a compression chamber. The stationary disc has an exhaust port, and the support has a back pressure inlet channel. The back pressure inlet channel communicates with the exhaust port to guide all exhaust gas from the exhaust port into the back pressure inlet channel. The back pressure inlet channel communicates with a back pressure region, which communicates with the back pressure side of the moving disc base plate to increase the back pressure on the moving disc. This invention increases the back pressure on the moving disc, resulting in a tighter contact between the stationary and moving discs, preventing separation, improving the pump body's sealing performance, and solving the problem of insufficient back pressure causing separation of the stationary and moving discs, leading to radial leakage in the compression chamber.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, specifically to a pump body structure, a scroll compressor, and an air conditioner. Background Technology

[0002] Scroll compressors are widely used in refrigeration, air conditioning, and heat pump industries due to their high efficiency, small size, light weight, and stable operation. Generally, a scroll compressor consists of a sealed casing, a stationary scroll, a moving scroll, a support frame, a crankshaft, an anti-rotation mechanism, an oil supply device, and a motor. Both the moving and stationary scrolls have helical profiles. The moving scroll is eccentrically positioned relative to the stationary scroll, with a 180° angle between them, creating multiple crescent-shaped spaces between them. When the moving scroll rotates around the center of the stationary scroll with a certain radius, the outer crescent-shaped spaces continuously move towards the center. During this process, the refrigerant is gradually pushed towards the central space, its volume continuously decreasing while its pressure continuously increasing until it connects with the central exhaust port. The high-pressure refrigerant is then discharged from the pump body, completing the compression process.

[0003] During compressor operation, the compression chamber compresses the refrigerant, increasing the refrigerant pressure. This increases the downward force on the moving plate, causing it to tend to detach from the stationary plate. Detachment from the stationary plate leads to radial leakage in the compression chamber. Therefore, in compressor design, high-pressure oil is often introduced to increase the pressure in the space between the back of the moving plate and the upper support surface, applying an upward supporting force to the moving plate.

[0004] Because existing scroll compressors suffer from technical problems such as insufficient back pressure leading to separation of the moving and stationary discs and radial leakage in the compression chamber, this invention studies and designs a pump body structure, a scroll compressor, and an air conditioner. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the existing scroll compressor, which has insufficient back pressure, which easily leads to the separation of the moving and stationary plates and causes radial leakage of the compression chamber, thereby providing a pump body structure, a scroll compressor and an air conditioner.

[0006] To address the above problems, the present invention provides a pump body structure comprising:

[0007] The device comprises a stationary disk, a moving disk, and a support. The stationary disk and the moving disk form a compression cavity. The stationary disk has an exhaust port, and the support has a back pressure inlet channel. The back pressure inlet channel is connected to the exhaust port so that all the exhaust from the exhaust port can be guided into the back pressure inlet channel. The back pressure inlet channel is connected to a back pressure region, and the back pressure region is connected to the back pressure side of the moving disk base plate of the moving disk to increase the back pressure on the moving disk.

[0008] In some implementations...

[0009] The support includes a first protruding structure located on its outer periphery and protruding toward the stationary plate, at least a portion of the first protruding structure being in contact with the stationary plate to support the stationary plate, and the back pressure inlet channel being provided on the first protruding structure.

[0010] In some implementations...

[0011] The back pressure inlet channel includes a first axial channel, a first radial channel, and a second axial channel. The first protruding structure includes a first axial end face that connects with the stationary plate and a first inner peripheral wall located on the inner peripheral side. The first axial channel extends from the first axial end face in the axial direction. The first radial channel extends in the radial direction inside the bracket. The second axial channel extends in the axial direction to communicate with the back pressure region. The first axial channel, the first radial channel, and the second axial channel are connected in sequence.

[0012] In some implementations...

[0013] The bracket further includes a second protruding structure located inside the first protruding structure and protruding toward the moving disk. The second protruding structure is opposite to the moving disk to provide support and / or seal for the moving disk. A first sealing groove is formed on the bracket between the first protruding structure and the second protruding structure. The bottom height of the first sealing groove is lower than the height of the axial end face of the first protruding structure and lower than the height of the axial end face of the second protruding structure, respectively. The first protruding structure, the second protruding structure, the first sealing groove, the back surface of the substrate of the moving disk, and the end face of the stationary disk together form the back pressure area.

[0014] In some implementations...

[0015] The first protruding structure is an annular structure, the second protruding structure is an annular structure, the first sealing groove is a sealing ring groove, the height of the axial end face of the first protruding structure is higher than the height of the axial end face of the second protruding structure, and when the back pressure inlet channel includes a first axial channel, a first radial channel and a second axial channel, one end of the second axial channel is connected to the first sealing groove.

[0016] In some implementations...

[0017] The back pressure inlet channel is provided with a first anti-backflow component, which only allows fluid to flow from the back pressure inlet channel to the first sealing groove; the second protruding structure is provided with a first groove on the end face opposite to the moving plate, and a first sealing component is provided in the first groove.

[0018] In some implementations...

[0019] Within the projection plane of the axial end face of the support, the angle between the center line of the back pressure inlet channel in the radial direction and the center line of the back pressure outlet channel in the radial direction in the circumferential direction is C1, and the minimum angle between the back pressure inlet channel and the back pressure outlet channel in the circumferential direction is C2, with 0 < C2 < C1 < 90°.

[0020] In some implementations...

[0021] The first protruding structure is also provided with a back pressure outlet channel that extends from its inner peripheral wall to its outer peripheral wall. One end of the back pressure outlet channel is connected to the first sealing groove, and the other end can be connected to the outer side of the outer peripheral wall of the bracket. The back pressure outlet channel is not connected to the back pressure inlet channel.

[0022] In some implementations...

[0023] The back pressure outlet channel is provided with a second anti-backflow component, which only allows fluid to flow out of the bracket from the first sealing groove.

[0024] The back pressure outlet channel includes a second radial channel and a third radial channel. The inner radial end of the second radial channel is connected to the first sealing groove, and the outer radial end of the second radial channel is not connected to the outer peripheral wall of the bracket. The outer radial end of the third radial channel is connected to the outer peripheral wall of the bracket, and the inner radial end of the third radial channel is connected to the second radial channel. The second radial channel and the third radial channel are misaligned and connected in the axial direction, and / or the second radial channel and the third radial channel are misaligned and connected in the circumferential direction.

[0025] In some implementations...

[0026] The bracket further includes a third protruding structure located inside the second protruding structure and protruding toward the moving disk. The third protruding structure is opposite to the moving disk to provide support and / or seal for the moving disk. A second sealing groove is formed on the bracket between the second protruding structure and the third protruding structure. A cross slip ring is provided in the second sealing groove. A second groove is provided on the end face of the third protruding structure opposite to the moving disk. A second sealing element is provided in the second groove.

[0027] In some implementations...

[0028] In the projection plane of the vertical plane, the radial distance between the central axis of the bracket and the inner peripheral wall of the first sealing groove is the inner diameter D1 of the back pressure region; the radial distance between the central axis of the bracket and the outer peripheral wall of the first sealing groove is the outer diameter D2 of the back pressure region; the radial distance between the central axis of the moving disk and the outer peripheral wall of the moving disk base plate is the outer diameter D3 of the moving disk base plate; and there is a crankshaft eccentricity e.

[0029] The second sealing groove is provided with two keyways symmetrically arranged with respect to the central axis of the bracket. These keyways are used to mate with the cross slip ring, and the maximum distance between the two keyways is L1.

[0030] D1+2e<D3<D2-2e, L1<D1.

[0031] The present invention also provides a scroll compressor, which includes the aforementioned pump body structure, and further includes a housing, an intake pipe, and an exhaust pipe. The intake pipe passes through the housing and communicates with the compression chamber between the stationary disc and the moving disc. The exhaust port of the stationary disc communicates with a first region inside the housing. The first region communicates with the back pressure inlet channel of the bracket. The second region inside the housing communicates with the back pressure outlet channel of the bracket. The exhaust pipe passes through the housing and communicates with the second region. The first region is the region communicating with the exhaust port. The first region is located on one axial side of the bracket, and the second region is located on the other axial side of the bracket.

[0032] The present invention also provides an air conditioner comprising the aforementioned scroll compressor.

[0033] The pump body structure, scroll compressor, and air conditioner provided by this invention have the following beneficial effects:

[0034] 1. This invention, by setting a back pressure inlet channel on the bracket, can guide all the exhaust from the exhaust port into the back pressure inlet channel, which can communicate with the back pressure area. The back pressure area can communicate with the back pressure side of the moving plate substrate, thereby effectively increasing the back pressure on the moving plate. This makes the contact between the stationary plate and the moving plate tighter and prevents separation, improving the sealing performance of the pump body and solving the problem that insufficient back pressure can easily lead to separation of the moving and stationary plates, resulting in radial leakage of the compression chamber.

[0035] 2. This invention, through the design of the air passage and the addition of a first sealing groove structure to the upper support, creates a unidirectional back pressure area between the upper support and the moving plate. This forces the refrigerant from the pump body through the active area of ​​the moving plate base plate. The agitation caused by the movement of the moving plate base plate separates the refrigerant oil from the refrigerant. While maintaining the back pressure of the moving plate, the oil-gas separation function of the exhaust is completed. The separated refrigerant oil remains in the back pressure area, providing a lubricating effect on the end faces of the moving and stationary plates, thus achieving the function of oil-gas separation and improving the stability and reliability of the compressor operation. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram of the pump body portion of the scroll compressor of the present invention;

[0037] Figure 2 This is a longitudinal sectional view of the pump body portion of the scroll compressor of the present invention;

[0038] Figure 3 yes Figure 2 A magnified view of part A in the image;

[0039] Figure 4 yes Figure 2 A magnified view of part B in the image;

[0040] Figure 5 This is a three-dimensional structural diagram of the upper support portion of the scroll compressor of the present invention;

[0041] Figure 6 This is a top view of the upper support portion of the scroll compressor of the present invention;

[0042] Figure 7 This is a top view of the moving disc portion of the scroll compressor of the present invention;

[0043] Figure 8 This is a force analysis diagram of the moving disc portion of the scroll compressor of the present invention;

[0044] Figure 9 This is a longitudinal sectional view of the entire scroll compressor of the present invention.

[0045] The reference numerals in the attached figures are as follows:

[0046] 1. Stationary disc; 2. Support; 3. Moving disc; 4. Cross slip ring; 5. Housing; 6. Intake pipe; 7. Exhaust pipe; 8. Compression chamber; 9. Exhaust port; 10. Back pressure zone; 11. First zone; 12. Second zone;

[0047] 201. Back pressure inlet channel; 201a. First axial channel; 201b. First radial channel; 201c. Second axial channel; 202. Back pressure outlet channel; 202a. Second radial channel; 202b. Third radial channel; 203. First sealing groove; 204. First protruding structure; 205. First axial end face; 206. First inner peripheral wall; 207. Second protruding structure; 208. Second sealing groove; 209. Third protruding structure; 210. Keyway;

[0048] M1, first seal; M2, second seal; F1, first anti-backflow component; F2, second anti-backflow component. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0052] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0053] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0054] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0055] like Figures 1 to 9 As shown, the present invention provides a pump body structure, which includes:

[0056] The device comprises a stationary disk 1, a moving disk 3, and a support 2. The stationary disk 1 and the moving disk 3 form a compression cavity 8. The stationary disk 1 has an exhaust port 9. The support 2 has a back pressure inlet channel 201. The back pressure inlet channel 201 can communicate with the exhaust port 9 so that all the exhaust from the exhaust port 9 can be guided into the back pressure inlet channel 201. The back pressure inlet channel 201 can communicate with the back pressure region 10. The back pressure region 10 can communicate with the back pressure side of the moving disk base plate of the moving disk 3 to increase the back pressure on the moving disk 3.

[0057] This invention, by setting a back pressure inlet channel on the bracket, can guide all the exhaust from the exhaust port into the back pressure inlet channel, which can communicate with the back pressure area. The back pressure area can communicate with the back pressure side of the moving plate substrate, thereby effectively increasing the back pressure on the moving plate. This makes the contact between the stationary plate and the moving plate tighter and prevents separation, improving the sealing performance of the pump body and solving the problem that insufficient back pressure can easily lead to separation of the moving and stationary plates, resulting in radial leakage of the compression chamber.

[0058] This invention designs a gas path structure that directs the exhaust pressure to the outer circumference of the moving plate base, providing upward support and resulting in better radial sealing. It also allows for the separation of refrigerant oil carried in the exhaust. After the refrigerant enters the compressor, it is compressed and pressurized in the compression chamber formed by the moving plate 3 and the stationary plate 1. Then, it flows into the upper chamber through the exhaust port 9 of the stationary plate 1. The upper chamber of the compressor can only enter the lower chamber through a single route via the back pressure region. The compressor exhaust port is located in the lower chamber, ensuring that all exhaust gas is directed to the back pressure inlet channel, improving the back pressure boosting effect and sealing performance.

[0059] In some implementations...

[0060] The support 2 includes a first protruding structure 204 located on its outer periphery and protruding toward the stationary plate 1. At least a portion of the first protruding structure 204 is connected to the stationary plate 1 to support the stationary plate 1. The back pressure inlet channel 201 is provided on the first protruding structure 204.

[0061] This is the preferred location and configuration of the back pressure inlet channel of the present invention. A first protruding structure protruding towards the stationary disk is provided on the outer periphery of the bracket, which can connect with the stationary disk to support it. At the same time, there is also a part of the structure that does not connect with the stationary disk. The back pressure inlet channel is provided on this part of the structure, so that it can be effectively connected with the exhaust area (first area 11) from the exhaust port, ensuring that all the exhaust gas is forcibly introduced into the back pressure inlet channel, thereby increasing the back pressure of the moving scroll and ensuring the sealing performance during the compression process.

[0062] In some implementations...

[0063] The back pressure inlet channel 201 includes a first axial channel 201a, a first radial channel 201b, and a second axial channel 201c. The first protruding structure 204 includes a first axial end face 205 connected to the stationary plate 1 and a first inner peripheral wall 206 located on the inner peripheral side. The first axial channel 201a extends from the first axial end face 205 in the axial direction. The first radial channel 201b extends radially inside the bracket 2. The second axial channel 201c extends axially to communicate with the back pressure region 10. The first axial channel 201a, the first radial channel 201b, and the second axial channel 201c are connected sequentially.

[0064] This is a preferred structural form of the back pressure inlet channel of the present invention. The first axial channel can pass through the first protruding structure along the axial direction to introduce the gas in the upper part of the support into the interior of the support. The first radial channel can transmit the exhaust gas introduced by the first axial channel to achieve the purpose of transmission to the radially inner position. The second axial channel can communicate with the first radial channel to guide the gas to the back pressure area, thereby enhancing the back pressure of the moving plate substrate and improving the sealing performance.

[0065] In some implementations...

[0066] The bracket 2 further includes a second protruding structure 207 located inside the first protruding structure 204 and protruding toward the moving disk 3. The second protruding structure 207 is opposite to the moving disk 3 to provide support and / or seal for the moving disk 3. A first sealing groove 203 is formed on the bracket 2 between the first protruding structure 204 and the second protruding structure 207. The bottom height of the first sealing groove 203 is lower than the height of the axial end face of the first protruding structure 204 and lower than the height of the axial end face of the second protruding structure 207, respectively. The first protruding structure 204, the second protruding structure 207, the first sealing groove 203, the back surface of the substrate of the moving disk 3, and the end face of the stationary disk 1 together form the back pressure area 10.

[0067] This is a further preferred structural form of the bracket of the present invention. The second protruding structure can form a first sealing groove structure with the first protruding structure. The first sealing groove is connected to the back pressure inlet channel to accommodate the entry of exhaust gas. The first and second protruding structures, the first sealing groove, the back side of the moving plate substrate and the end face of the stationary plate together form a back pressure area, thereby effectively introducing exhaust gas from the first sealing groove and acting on the back side of the moving plate substrate to increase the back pressure on the moving plate substrate and improve the sealing performance of the compression process.

[0068] As the crankshaft drives the rotation of the moving disc 3, it continuously agitates in the back pressure area, causing the lubricating oil in the refrigerant to separate from the refrigerant (oil-gas separation function); after the refrigerant leaves the back pressure area, it remains in the back pressure area, and the lubricating oil remaining in the back pressure area contacts and adheres to the end face of the stationary disc 1 in the back pressure area. During the continuous movement of the moving disc 3, it lubricates the contact surface between the stationary disc 1 and the moving disc 3 (oil priming lubrication function).

[0069] This invention, through the addition of a first sealing groove structure to the upper support, uses the agitation caused by the operation of the moving plate substrate to separate the refrigerant oil from the refrigerant in the first sealing groove. While ensuring the back pressure of the moving plate, it completes the oil-gas separation function of the exhaust. The separated refrigerant oil remains in the back pressure area, providing a lubricating effect to the end faces of the moving and stationary plates, thus forming the oil-gas separation function.

[0070] In some implementations...

[0071] The first protruding structure 204 is an annular structure, the second protruding structure 207 is an annular structure, the first sealing groove 203 is a sealing ring groove, and the height of the axial end face of the first protruding structure 204 is higher than the height of the axial end face of the second protruding structure 207. When the back pressure inlet channel 201 includes a first axial channel 201a, a first radial channel 201b, and a second axial channel 201c, one end of the second axial channel 201c is connected to the first sealing groove 203.

[0072] This is a preferred structural form of the first and second protruding structures and the first sealing groove of the present invention. The two annular protruding structures can sandwich a sealing ring groove to form an annular structure, which can increase the oil-gas separation area and improve the oil separation rate. Through the design of the air passage and the addition of the first sealing groove structure to the upper support, the present invention makes the upper support and the moving plate form a unidirectional back pressure area, which forces the refrigerant from the pump body to pass through the active area of ​​the moving plate base plate. Through the agitation caused by the operation of the moving plate base plate, the refrigerant oil in the refrigerant in the first sealing groove is separated from the refrigerant. While ensuring the back pressure of the moving plate, the oil-gas separation function of the exhaust is completed. The separated refrigerant oil remains in the back pressure area, which brings a lubricating effect to the end face of the moving and stationary plates, forming the oil-gas separation function and improving the stability and reliability of the compressor operation.

[0073] In some implementations...

[0074] The back pressure inlet channel 201 is provided with a first anti-backflow component F1, which only allows fluid to flow from the back pressure inlet channel 201 to the first sealing groove 203; the second protruding structure 207 is provided with a first groove on the end face opposite to the moving plate 3, and a first sealing component M1 is provided in the first groove.

[0075] The present invention also prevents gas in the back pressure area from flowing back into the exhaust chamber through the back pressure inlet channel by a first anti-backflow component in the back pressure inlet channel, thus affecting normal exhaust; the end face of the second protruding structure is provided with a first groove, in which a first sealing component is provided, which can seal the gas in the first sealing groove and the gas (medium pressure, back pressure) in the second sealing groove, preventing mixing and affecting the stability of the back pressure, and preventing mixing and affecting the normal exhaust pressure of the compressor.

[0076] In this invention, during the refrigerant flow through the back pressure region, due to the installation of the first anti-backflow component F1 and the second anti-backflow component F2, the refrigerant can only flow into the back pressure region in one direction. The high-pressure refrigerant enters the back side of the substrate of the moving disk 3, forming an upward supporting force on the moving disk 3 (back pressure support function); due to the rotation of the moving disk 3 driven by the crankshaft, it is constantly agitated in the back pressure region, causing the lubricating oil in the refrigerant to separate from the refrigerant (oil-gas separation function); after the refrigerant leaves the back pressure region, it remains in the back pressure region, and the lubricating oil remaining in the back pressure region contacts and adheres to the end face of the stationary disk 1 in the back pressure region, lubricating the contact surface between the stationary disk 1 and the moving disk 3 during the continuous movement of the moving disk 3 (oil priming lubrication function).

[0077] In some implementations...

[0078] The first protruding structure 204 is also provided with a back pressure outlet channel 202 extending from its inner peripheral wall to its outer peripheral wall. One end of the back pressure outlet channel 202 is connected to the first sealing groove 203, and the other end can be connected to the outer side of the outer peripheral wall of the bracket 2. The back pressure outlet channel 202 is not connected to the back pressure inlet channel 201 (preferably, the back pressure outlet channel and the back pressure inlet channel are offset in both the circumferential and axial directions to form a non-connection, such as...). Figure 1 (As shown).

[0079] The present invention also enables the effective discharge of gas after passing through the back pressure support of the opposing plate and the discharge of gas after passing through the oil-gas separation in the first sealing groove through the back pressure outlet channel provided on the first protruding structure, ensuring the normal operation of the compressor exhaust. Furthermore, the back pressure outlet channel is not connected to the back pressure inlet channel, which ensures that the exhaust gas introduced into the back pressure inlet channel can be discharged only after undergoing a certain degree of back pressure boosting and oil-gas separation, thus avoiding the situation where the back pressure boosting effect decreases.

[0080] like Figure 1As shown, an exhaust port 9 is provided on the outer periphery of the stationary plate 1. The exhaust port 9 and the back pressure inlet channel 201 of the bracket 2 are angularly coincident (the stationary plate 1 is fixed on the bracket 2. After fixing, the relative positions of the two are determined. The angular coincidence means that the angles they are at are coincident, so that the two holes can be connected). This allows the refrigerant discharged from the exhaust port of the stationary plate 1 to enter the back pressure area of ​​the upper bracket through the back pressure inlet channel 201 and finally flow out from the back pressure outlet channel 202.

[0081] In some implementations...

[0082] The back pressure outlet channel 202 is provided with a second anti-backflow component F2, which only allows fluid to flow out of the bracket 2 from the first sealing groove 203.

[0083] The back pressure outlet channel 202 includes a second radial channel 202a and a third radial channel 202b. The inner radial end of the second radial channel 202a is connected to the first sealing groove 203, and the outer radial end of the second radial channel 202a is not connected to the outer peripheral wall of the bracket 2. The outer radial end of the third radial channel 202b is connected to the outer peripheral wall of the bracket 2, and the inner radial end of the third radial channel 202b is connected to the second radial channel 202a. The second radial channel 202a and the third radial channel 202b are misaligned and connected in the axial direction, and / or the second radial channel 202a and the third radial channel 202b are misaligned and connected in the circumferential direction.

[0084] This is a preferred structural form of the back pressure outlet channel of the present invention. The second anti-backflow component can prevent fluid from entering the first sealing groove from the outside of the support through the back pressure outlet channel, thus affecting the sealing performance. The back pressure outlet channel of the present invention preferably includes two mutually staggered second and third radial channels, which is to generate a certain resistance to the exhaust in the first sealing groove and reduce the flow rate.

[0085] like Figure 2-5 As shown, the back pressure area is formed by the back side of the moving plate substrate, the first sealing groove 203 of the upper bracket, the end face of the stationary plate, and the upper bracket; the back pressure inlet channel 201 has an axial groove on the outer sealing surface of the upper bracket, enters the back pressure area from the bottom surface of the back pressure area, and is provided with a first anti-backflow component F1; the back pressure outlet channel 202 has two non-through holes radially opened on the outer peripheral surface of the upper bracket, the walls of the two non-through holes are connected to form an outlet, and is provided with a second anti-backflow component F2.

[0086] In some implementations...

[0087] In the projection plane of the axial end face of the bracket 2, the angle between the center line of the back pressure inlet channel 201 in the radial direction and the center line of the back pressure outlet channel 202 in the radial direction in the circumferential direction is C1, the minimum angle between the back pressure inlet channel 201 and the back pressure outlet channel 202 in the circumferential direction is C2, and 0 < C2 < C1 < 90°.

[0088] This invention sets the included angle C1 between the inlet and outlet center lines of the back pressure zone and the minimum included angle C2 between the inlet and outlet to satisfy 0 < C2 < C1 < 90°. The smaller angle can prevent the exhaust from failing to be discharged in time, thus affecting the compressor's exhaust volume.

[0089] In some implementations...

[0090] The bracket 2 further includes a third protruding structure 209 located inside the second protruding structure 207 and protruding toward the moving disk 3. The third protruding structure 209 is opposite to the moving disk 3 to provide support and / or seal for the moving disk 3. A second sealing groove 208 is formed on the bracket 2 between the second protruding structure 207 and the third protruding structure 209. A cross slip ring 4 is provided in the second sealing groove 208. A second groove is provided on the end face of the third protruding structure 209 opposite to the moving disk 3. A second sealing element M2 is provided in the second groove.

[0091] The present invention also provides a third protruding structure inside the second protruding structure, which can support and / or seal the moving plate. A second sealing groove is formed between the second and third protruding structures to accommodate a cross slip ring, which further limits the rotation of the moving plate. The second seal is used to ensure the seal between the oil coming out of the crankshaft and the second sealing groove.

[0092] In some implementations...

[0093] In the projection plane of the vertical plane, the radial distance between the central axis of the bracket 2 and the inner peripheral wall of the first sealing groove 203 is the inner diameter D1 of the back pressure region 10; the radial distance between the central axis of the bracket 2 and the outer peripheral wall of the first sealing groove 203 is the outer diameter D2 of the back pressure region 10; the radial distance between the central axis of the moving disk 3 and the outer peripheral wall of the moving disk base plate of the moving disk 3 is the outer diameter D3 of the moving disk base plate; and there is a crankshaft eccentricity e.

[0094] The second sealing groove 208 is provided with two keyways 210 symmetrically arranged with respect to the central axis of the bracket 2. The keyways 210 are used to cooperate with the cross slip ring 4 for installation, and the maximum distance between the two keyways 210 is L1; and the following conditions are met: D1+2e<D3<D2-2e,L1<D1.

[0095] like Figure 6-7 The present invention also imposes certain limitations on the size of the back pressure area to ensure that the various functions of the patent achieve the best effect. By D1+2e<D3<D2-2e and L1<D1, it can be guaranteed that there will be no leakage and no collision. If these conditions are not met, the back pressure chamber will not be able to guarantee the pressure due to leakage, or the side of the moving plate will collide with the wall during operation.

[0096] The present invention also provides a scroll compressor, which includes the aforementioned pump body structure, and further includes a housing 5, an intake pipe 6, and an exhaust pipe 7. The intake pipe 6 passes through the housing 5 and communicates with the compression chamber 8 between the stationary disc 1 and the moving disc 3. The exhaust port 9 of the stationary disc 1 communicates with a first region 11 inside the housing 5. The first region 11 communicates with the back pressure inlet channel 201 of the support 2. The second region 12 inside the housing 5 communicates with the back pressure outlet channel 202 of the support 2. The exhaust pipe 7 passes through the housing 5 and communicates with the second region 12. The first region 11 is the region that communicates with the exhaust port 9. The first region 11 is located on one axial side of the support 2, and the second region 12 is located on the other axial side of the support 2.

[0097] The present invention also provides an air conditioner comprising the aforementioned scroll compressor.

[0098] The above description is merely 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 principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A pump body structure, characterized in that: include: A stationary disk (1), a moving disk (3), and a support (2) are provided. The stationary disk (1) and the moving disk (3) form a compression cavity (8). An exhaust port (9) is provided on the stationary disk (1). A back pressure inlet channel (201) is provided on the support (2). The back pressure inlet channel (201) can communicate with the exhaust port (9) so that all the exhaust from the exhaust port (9) can be guided into the back pressure inlet channel (201). The back pressure inlet channel (201) can communicate with the back pressure area (10). The back pressure area (10) can communicate with the back pressure side of the moving disk base plate of the moving disk (3) to increase the back pressure of the moving disk (3). The bracket (2) includes a first protruding structure (204) located on its outer periphery and protruding toward the stationary plate (1). The bracket (2) also includes a second protruding structure (207) located inside the first protruding structure (204) and protruding toward the moving plate (3). A first sealing groove (203) is formed on the bracket (2) between the first protruding structure (204) and the second protruding structure (207). The first protruding structure (204) is also provided with a back pressure outlet channel (202) that extends from its inner periphery wall to its outer periphery wall. One end of the back pressure outlet channel (202) is connected to the first sealing groove (203), and the other end can be connected to the outer side of the outer periphery wall of the bracket (2).

2. The pump body structure according to claim 1, characterized in that: At least a portion of the structure of the first protruding structure (204) is connected to the stationary disk (1) to support the stationary disk (1), and the back pressure inlet channel (201) is provided on the first protruding structure (204).

3. The pump body structure according to claim 2, characterized in that: The back pressure inlet channel (201) includes a first axial channel (201a), a first radial channel (201b), and a second axial channel (201c). The first protruding structure (204) includes a first axial end face (205) connected to the stationary plate (1) and a first inner peripheral wall (206) located on the inner peripheral side. The first axial channel (201a) extends from the first axial end face (205) in the axial direction. The first radial channel (201b) extends in the radial direction inside the bracket (2). The second axial channel (201c) extends axially to communicate with the back pressure region (10). The first axial channel (201a), the first radial channel (201b), and the second axial channel (201c) are connected in sequence.

4. The pump body structure according to claim 2 or 3, characterized in that: The second protruding structure (207) is opposite to the moving disk (3) to provide support and / or seal for the moving disk (3). The bottom height of the first sealing groove (203) is lower than the height of the axial end face of the first protruding structure (204) and lower than the height of the axial end face of the second protruding structure (207). The first protruding structure (204), the second protruding structure (207), the first sealing groove (203), the back side of the substrate of the moving disk (3) and the end face of the stationary disk (1) together form the back pressure area (10).

5. The pump body structure according to claim 4, characterized in that: The first protruding structure (204) is an annular structure, the second protruding structure (207) is an annular structure, the first sealing groove (203) is a sealing ring groove, the height of the axial end face of the first protruding structure (204) is higher than the height of the axial end face of the second protruding structure (207), when the back pressure inlet channel (201) includes a first axial channel (201a), a first radial channel (201b) and a second axial channel (201c), one end of the second axial channel (201c) is connected to the first sealing groove (203).

6. The pump body structure according to claim 4, characterized in that: The back pressure inlet channel (201) is provided with a first anti-backflow component (F1), which allows fluid to flow from the back pressure inlet channel (201) to the first sealing groove (203); the second protruding structure (207) is provided with a first groove on the end face opposite to the moving plate (3), and a first sealing component (M1) is provided in the first groove.

7. The pump body structure according to claim 4, characterized in that: The back pressure outlet channel (202) is not connected to the back pressure inlet channel (201).

8. The pump body structure according to claim 7, characterized in that: The back pressure outlet channel (202) is provided with a second anti-backflow component (F2), which only allows fluid to flow out of the bracket (2) from the first sealing groove (203); The back pressure outlet channel (202) includes a second radial channel (202a) and a third radial channel (202b). The inner radial end of the second radial channel (202a) is connected to the first sealing groove (203). The outer radial end of the second radial channel (202a) is not connected to the outer peripheral wall of the bracket (2). The outer radial end of the third radial channel (202b) is connected to the outer peripheral wall of the bracket (2). The inner radial end of the third radial channel (202b) is connected to the second radial channel (202a). The second radial channel (202a) and the third radial channel (202b) are misaligned and connected in the axial direction, and / or the second radial channel (202a) and the third radial channel (202b) are misaligned and connected in the circumferential direction.

9. The pump body structure according to claim 7, characterized in that: In the projection plane of the axial end face of the bracket (2), the angle between the center line of the back pressure inlet channel (201) in the radial direction and the center line of the back pressure outlet channel (202) in the radial direction in the circumferential direction is C1, the minimum angle between the back pressure inlet channel (201) and the back pressure outlet channel (202) in the circumferential direction is C2, and 0 < C2 < C1 < 90°.

10. The pump body structure according to claim 4, characterized in that: The bracket (2) further includes a third protruding structure (209) located inside the second protruding structure (207) and protruding toward the moving disk (3). The third protruding structure (209) is opposite to the moving disk (3) to provide support and / or seal for the moving disk (3). A second sealing groove (208) is formed on the bracket (2) between the second protruding structure (207) and the third protruding structure (209). A cross slip ring (4) is provided in the second sealing groove (208). A second groove is provided on the end face of the third protruding structure (209) opposite to the moving disk (3). A second sealing element (M2) is provided in the second groove.

11. The pump body structure according to claim 10, characterized in that: In the projection plane of the vertical plane, the radial distance between the central axis of the bracket (2) and the inner peripheral wall of the first sealing groove (203) is the inner diameter D1 of the back pressure area (10), the radial distance between the central axis of the bracket (2) and the outer peripheral wall of the first sealing groove (203) is the outer diameter D2 of the back pressure area (10), the radial distance between the central axis of the moving disk (3) and the outer peripheral wall of the moving disk substrate of the moving disk (3) is the outer diameter D3 of the moving disk substrate, and there is a crankshaft eccentricity e. The second sealing groove (208) is provided with two keyways (210) symmetrically arranged with respect to the central axis of the bracket (2). The keyways (210) are used to cooperate with the cross slip ring (4) for installation, and the maximum distance between the two keyways (210) is L1; and D1+2e<D3<D2-2e,L1<D1。 12. A scroll compressor, characterized in that: The pump body structure including any one of claims 7-9 further includes a housing (5), an intake pipe (6) and an exhaust pipe (7), wherein the intake pipe (6) passes through the housing (5) and communicates with the compression chamber (8) between the stationary disc (1) and the moving disc (3), the exhaust port (9) of the stationary disc (1) communicates with a first region (11) inside the housing (5), the first region (11) communicates with the back pressure inlet channel (201) of the bracket (2), the second region (12) inside the housing (5) communicates with the back pressure outlet channel (202) of the bracket (2), the exhaust pipe (7) passes through the housing (5) and communicates with the second region (12), the first region (11) is the region communicating with the exhaust port (9), the first region (11) is located on one axial side of the bracket (2), and the second region (12) is located on the other axial side of the bracket (2).

13. An air conditioner, characterized in that: Includes the scroll compressor as described in claim 12.

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