A lower cover assembly of a compressor, a compressor and an air conditioner

Abstract

The application provides a lower cover assembly of a compressor, the compressor and an air conditioner. The lower cover assembly of the compressor comprises a first cover body and a second cover body. The first cover body has an internal cavity. The second cover body is located in the internal cavity. An upper end surface of the second cover body forms an oil storage end surface capable of storing oil. The second cover body can move up and down in the internal cavity. The movement of the second cover body can change with the operating frequency of the compressor, so that the height of the upper end surface of the second cover body can change with the operating frequency of the compressor. The oil suction port of the crankshaft of the compressor can always be in contact with the lubricating oil on the second cover body. According to the application, adaptive changes and adjustments can be made under different operating conditions of the compressor at different rotating speeds. The problem that the amount of lubricating oil provided by the compressor under different operating conditions at different rotating speeds cannot be adaptively changed and cannot meet the lubrication requirements, resulting in poor lubrication reliability, is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically to a compressor lower cover assembly, a compressor, and an air conditioner. Background Technology

[0002] In traditional rotary compressors, lubricating oil supply mainly relies on a fixed oil sump structure, where the centrifugal force generated by the crankshaft rotation draws the lubricating oil into the lubrication points. However, under high-speed operating conditions, the oil level in traditional structures often falls below the suction port, resulting in insufficient lubrication. This can easily lead to accelerated wear of critical compressor components, affecting the operational stability and service life of the equipment.

[0003] Furthermore, existing compressor lubrication systems typically lack dynamic adjustment capabilities, and oil distribution is significantly affected by rotational speed and pressure. At high speeds, lubricating oil is thrown towards the edge of the oil sump due to centrifugal force, resulting in reduced oil volume near the suction port and difficulty in oil intake.

[0004] Currently, some studies have attempted to improve lubrication by optimizing oil circuit design or adding auxiliary pumps, but these methods are often complex in structure, costly, and difficult to dynamically adapt to the needs of different working conditions.

[0005] Because existing compressors have technical problems such as the inability to adapt the amount of lubricating oil provided under different operating speeds, which fails to meet lubrication requirements and results in poor lubrication reliability, this invention studies and designs a compressor lower cover assembly, a compressor, and an air conditioner. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the compressor in the prior art that the amount of lubricating oil provided cannot be adapted to change under different operating conditions of different speeds, thus failing to meet the lubrication requirements and resulting in poor lubrication reliability. The present invention provides a lower cover assembly of a compressor, a compressor, and an air conditioner.

[0007] To address the above problems, the present invention provides a lower cover assembly for a compressor, comprising: A first cover and a second cover, the first cover having an internal cavity, the second cover being located in the internal cavity, and the upper end face of the second cover forming an oil storage end face capable of storing oil, and the second cover being able to move up and down in the internal cavity, and the movement of the second cover being able to change with the operating frequency of the compressor, so that the height of the upper end face of the second cover can change with the operating frequency of the compressor, so that the oil suction port of the compressor crankshaft can always be in contact with the lubricating oil on the second cover.

[0008] In some implementations... When the operating frequency of the compressor increases, the amount of lubricating oil drawn into the oil inlet of the crankshaft increases, and the amount of lubricating oil on the upper surface of the second cover decreases. At this time, the second cover can move upward to reduce the distance between the upper surface of the second cover and the oil inlet. When the operating frequency of the compressor decreases, the amount of lubricating oil drawn into the oil inlet of the crankshaft decreases, and the amount of lubricating oil on the upper surface of the second cover increases. At this time, the second cover can move downward to increase the distance between the upper surface of the second cover and the oil inlet.

[0009] In some implementations... An elastic structure is also provided in the internal cavity of the first cover, the elastic structure is connected between the first cover and the second cover, and the elastic structure can apply an upward elastic thrust to the second cover; When the operating frequency of the compressor increases, the amount of lubricating oil at the upper end of the second cover decreases, the downward gravity of the lubricating oil on the second cover decreases, and the second cover moves upward under the combined force of its gravity and the elastic force of the elastic structure, reducing the distance between the upper end face of the second cover and the oil suction port, so that the lubricating oil at the upper end of the second cover is always connected to the oil suction port. When the operating frequency of the compressor decreases, the amount of lubricating oil at the upper end of the second cover increases, and the downward gravity of the lubricating oil on the second cover increases. Under the combined force of its gravity and the elastic force of the elastic structure, the second cover moves downward, increasing the distance between the upper end face of the second cover and the oil suction port, so that the lubricating oil at the upper end of the second cover is always connected to the oil suction port.

[0010] In some implementations... The elastic structure is at least two, and at least one elastic structure has a different stiffness from at least one elastic structure.

[0011] In some implementations... The elastic structure includes a first elastic structure and a second elastic structure. The stiffness of the first elastic structure is less than that of the second elastic structure. The first elastic structure and the second elastic structure act on different positions of the second cover. When the weight of the lubricating oil at the upper end of the second cover is less than a preset weight, the first elastic structure provides dominant adjustment support for the second cover. When the weight of the lubricating oil at the upper end of the second cover is greater than the preset weight, the second elastic structure provides dominant adjustment support for the second cover.

[0012] In some implementations... It also includes a guide post, the guide post having a cavity inside; The guide post is disposed at the inner bottom of the first cover, one end of the elastic structure is inserted into the cavity of the guide post, and the other end of the elastic structure is fixedly connected to the lower bottom of the second cover; or, the guide post is disposed at the lower bottom of the second cover, one end of the elastic structure is inserted into the cavity of the guide post, and the other end of the elastic structure is fixedly connected to the inner bottom of the first cover.

[0013] In some implementations... It also includes a support block, which is fixed to the other end of the elastic structure and is fixed to the lower bottom of the second cover or the inner bottom of the first cover, so that the other end of the elastic structure is fixed to the second cover or the first cover through the support block.

[0014] In some implementations... The first cover has a guide groove on its inner peripheral wall and a guide member on its outer peripheral side. The guide groove extends vertically and the guide member is engaged in the guide groove so that it can move up and down along the extension direction of the guide groove, so that the second cover can move up and down above the first cover. And / or, an oil guide groove is also provided on the upper surface of the second cover, the oil guide groove extending from the center of the upper surface of the second cover outwards to the surrounding edges.

[0015] The present invention also provides a compressor, which includes the aforementioned compressor lower cover assembly, and further includes a pump body and a motor. The pump body includes the crankshaft, the lower end of the crankshaft is spaced from the upper end face of the second cover, the lower end of the crankshaft has the oil suction port, and the height of the upper end face of the second cover can change with the operating frequency of the compressor, so that the oil suction port can always be in contact with the lubricating oil on the upper end face of the second cover.

[0016] In some implementations... It also includes an oil equalization pipe and a housing. The pump body and the motor are both located inside the housing. The first cover is connected to the lower end of the housing. The oil equalization pipe is located outside the housing. One end of the oil equalization pipe passes through the housing and extends into the interior of the housing and is located above the pump body. The other end of the oil equalization pipe passes through the housing and extends into the interior of the housing and is located below the pump body and above the second cover.

[0017] In some implementations... It also includes an oil guide pipe, one end of which is connected to the oil equalization pipe, and the other end of which is connected to the internal cavity of the first cover, that is, to the bottom of the second cover.

[0018] In some implementations... It also includes an oil equalization pipe and a housing. The pump body and the motor are both located inside the housing. The first cover is connected to the lower end of the housing. The oil equalization pipe is located outside the housing. One end of the oil equalization pipe passes through the housing and extends into the interior of the housing and is located above the pump body. The other end of the oil equalization pipe passes through the first cover and extends into the internal cavity of the first cover, that is, it connects to the lower part of the second cover.

[0019] In some implementations... The inner bottom of the first cover has an upwardly protruding first protrusion, and the first protrusion has a vertically extending sliding groove. The lower bottom of the second cover has a second protrusion, and at least part of the second protrusion is inserted into the sliding groove so that it can move up and down along the extension direction of the sliding groove. The outer periphery of the first protrusion and the inner wall of the first cover form an accommodating space. The other end of the oil-distributing pipe is connected to the accommodating space. When an elastic structure is also included, the elastic structure is also disposed in the accommodating space.

[0020] The present invention also provides an air conditioner that includes the aforementioned compressor.

[0021] The compressor lower cover assembly, compressor, and air conditioner provided by this invention have the following beneficial effects: 1. This invention employs a two-layer compressor lower cover assembly structure, specifically a first cover with an internal cavity, and a second cover disposed within the upward-facing internal cavity of the first cover. This allows the upper surface of the second cover to form an oil-storing end face. Furthermore, the vertical movement of the second cover, particularly its ability to adapt to changes in the compressor's operating frequency, ensures that the amount of lubricating oil stored in the second cover varies as the compressor frequency changes due to the pump structure drawing in different amounts of lubricating oil. This invention, by moving the second cover up and down with the compressor frequency, guarantees that the crankshaft's oil inlet remains in contact with the lubricating oil on the second cover. This enables dynamic adjustment without external control, allowing for adaptive changes and adjustments under different compressor operating speeds, ensuring an effective supply of lubricating oil to the pump and meeting lubrication requirements, thus improving lubrication reliability. This effectively solves the problem in existing technologies where the amount of lubricating oil supplied by compressors cannot adapt to different operating speeds, resulting in poor lubrication reliability.

[0022] 2. Furthermore, this invention utilizes an elastic structure positioned between the first and second covers. This elastic structure applies an upward elastic thrust to the second cover. Combined with the property that the amount of lubricating oil on the second cover decreases with increasing compressor frequency and increases with decreasing compressor frequency, when the amount of lubricating oil decreases, the elastic force pushes the second cover closer to the oil inlet, ensuring that the crankshaft's oil inlet can continue to draw oil even in low-oil conditions. Conversely, when the amount of lubricating oil increases, gravity overcomes the elastic force, pushing the second cover further away from the oil inlet, ensuring that the crankshaft's oil inlet can also continue to draw oil even in high-oil conditions. Therefore, the lubricating oil level is always higher than or level with the oil inlet at different compressor operating frequencies. This allows for automatic adjustment based on the compressor operating frequency, ensuring that the compressor crankshaft's oil inlet always draws lubricating oil into the pump body. This effectively solves the technical problems of insufficient lubricating oil and poor lubrication reliability under different compressor operating speeds. Attached Figure Description

[0023] Figure 1 This is a longitudinal sectional view of the compressor of the present invention (the inner lower cover has not been moved upwards). Figure 2 This is a longitudinal sectional view of the compressor of the present invention (with the inner lower cover moved upwards). Figure 3 This is a longitudinal sectional view of the adaptive adjustment compressor lower cover assembly of the present invention; Figure 4 yes Figure 3 The front and top views of the first cover; Figure 5 yes Figure 3 The front and top views of the second cover; Figure 6 yes Figure 3 A longitudinal section view of the spring structure portion; Figure 7 yes Figure 3 The elastic structure includes a multi-stage spring combination structure with different stiffnesses; Figure 8 This is a longitudinal sectional view of the compressor in an alternative embodiment of the present invention (the inner lower cover is not moved upward).

[0024] The reference numerals in the attached figures are as follows: 1. First cover; 2. Second cover; 3. Crankshaft; 4. Oil suction port; 5. Elastic structure; 6. First elastic structure; 7. Second elastic structure; 8. Guide post; 9. Guide groove; 10. Guide component; 11. Oil guide groove; 12. Pump body; 13. Motor; 14. Oil distribution pipe; 15. Housing; 16. Oil guide pipe; 17. Support block; 18. First protrusion; 19. Second protrusion. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] like Figure 1-8 As shown, the present invention provides a lower cover assembly for a compressor, comprising: A first cover 1 and a second cover 2, wherein the first cover 1 has an internal cavity, the second cover 2 is located in the internal cavity, and the upper end face of the second cover 2 forms an oil storage end face that can store oil, and the second cover 2 can move up and down in the internal cavity, and the movement of the second cover 2 can change with the operating frequency of the compressor, so that the height of the upper end face of the second cover 2 can change with the operating frequency of the compressor, so that the oil suction port 4 of the compressor crankshaft 3 can always be in contact with the lubricating oil on the second cover 2.

[0032] This invention employs a two-layer compressor lower cover assembly structure. Specifically, the first cover has an internal cavity, and the second cover is positioned within the upward-facing internal cavity of the first cover. This allows the upper surface of the second cover to form an oil-storing end face. Furthermore, the vertical movement of the second cover, particularly its ability to adapt to changes in the compressor's operating frequency, ensures that the amount of lubricating oil stored in the second cover varies as the compressor frequency changes and the pump structure draws in different amounts of lubricating oil. This invention, by moving the second cover up and down with the compressor frequency, guarantees that the crankshaft's oil inlet remains in contact with the lubricating oil on the second cover. This enables dynamic adjustment without external control, allowing for adaptive changes and adjustments under different compressor operating speeds. It ensures an effective supply of lubricating oil to the pump, meeting lubrication requirements and improving lubrication reliability. This effectively solves the problem in existing compressors where the amount of lubricating oil supplied cannot adapt to different operating speeds, resulting in poor lubrication reliability.

[0033] In some implementations... When the operating frequency of the compressor increases, the amount of lubricating oil drawn into the oil suction port 4 of the crankshaft 3 increases, and the amount of lubricating oil on the upper surface of the second cover 2 decreases. At this time, the second cover 2 can move upward to reduce the distance between the upper surface of the second cover 2 and the oil suction port 4. When the operating frequency of the compressor decreases, the amount of lubricating oil drawn into the oil suction port 4 of the crankshaft 3 decreases, and the amount of lubricating oil on the upper surface of the second cover 2 increases. At this time, the second cover 2 can move downward to increase the distance between the upper surface of the second cover 2 and the oil suction port 4.

[0034] This is a preferred structural form of the second cover of the present invention, which is coordinated with the increase or decrease of the compressor frequency. When the operating frequency increases, the pump body draws in more oil for lubrication, thus reducing the amount of lubricating oil on the upper surface of the second cover. If the second cover remains stationary (conventional technology), the crankshaft's oil suction port may not be able to draw in lubricating oil. Therefore, the present invention reduces the distance between the upper surface of the second cover and the oil suction port by moving the second cover upwards, effectively ensuring that the oil suction port remains below the oil level, thereby ensuring that the pump body can maintain its operating frequency. The pump body continues to effectively draw oil. However, when the frequency decreases, the pump body draws less oil for lubrication, and the amount of lubricating oil at the upper end of the second cover increases. If the second cover remains stationary (conventional technology), the oil level may submerge above the oil inlet of the crankshaft, causing unnecessary oil waste. Therefore, this invention increases the distance between the upper surface of the second cover and the oil inlet by moving the second cover downward, thereby effectively ensuring that the oil inlet remains below the oil level. This ensures that the pump body can continuously and effectively draw oil, while avoiding excessively high oil levels that could affect other structures of the pump body.

[0035] In some implementations... An elastic structure 5 is also provided in the internal cavity of the first cover 1. The elastic structure 5 is connected between the first cover 1 and the second cover 2. The elastic structure 5 can apply an upward elastic thrust to the second cover 2. When the operating frequency of the compressor increases, the amount of lubricating oil at the upper end of the second cover 2 decreases, the downward gravity of the lubricating oil on the second cover 2 decreases, and the second cover 2 moves upward under the combined force of its gravity and the elastic force of the elastic structure 5, reducing the distance between the upper end face of the second cover 2 and the oil suction port 4, so that the lubricating oil at the upper end of the second cover 2 is always connected to the oil suction port 4. When the operating frequency of the compressor decreases, the amount of lubricating oil at the upper end of the second cover 2 increases, and the downward gravity of the lubricating oil on the second cover 2 increases. Under the combined force of its gravity and the elastic force of the elastic structure 5, the second cover 2 moves downward, increasing the distance between the upper end face of the second cover 2 and the oil suction port 4, so that the lubricating oil at the upper end of the second cover 2 is always connected to the oil suction port 4.

[0036] The present invention further utilizes an elastic structure positioned between the first and second covers. This elastic structure applies an upward elastic thrust to the second cover. Combined with the property that the amount of lubricating oil on the second cover decreases with increasing compressor frequency and increases with decreasing compressor frequency, when the amount of lubricating oil decreases, the elastic force pushes the second cover closer to the oil inlet, ensuring that the crankshaft's oil inlet can continue to draw oil even in a low-oil state. Conversely, when the amount of lubricating oil increases, gravity overcomes the elastic force, pushing the second cover further away from the oil inlet, ensuring that the crankshaft's oil inlet can also continue to draw oil even in a rich-oil state. Therefore, the lubricating oil level is always higher than or level with the oil inlet at different compressor operating frequencies, enabling automatic adjustment based on the compressor operating frequency. This ensures that the compressor crankshaft's oil inlet always draws lubricating oil into the pump body, effectively solving the technical problems of insufficient lubricating oil and poor lubrication reliability under different compressor operating speeds.

[0037] This invention provides a dynamic oil adjustment device for the lower cover of a compressor, such as... Figure 3 It includes an inner lower cover (second cover 2) and an outer lower cover (first cover 1), with a spring device placed between them for adjusting the inner lower cover. The inner lower cover is connected to the compressor housing via the spring device, allowing it to move axially up and down under changes in oil pressure. Figure 2 When the compressor operates at high speed, a large amount of refrigerant oil is drawn into the air conditioning system and cannot return in time. This reduces the weight of the oil sump, and the spring mechanism pushes the inner lower cover upward, causing the oil to concentrate near the oil suction port, thereby improving oil suction efficiency. Figure 1 At low speeds, the heavy weight of the refrigeration oil reservoir causes the spring device to keep the inner bottom cover in a low position, ensuring a stable oil supply.

[0038] In some implementations... The elastic structure 5 is at least two, and at least one elastic structure has a different stiffness from at least one elastic structure.

[0039] The present invention preferably employs at least two elastic structures, wherein the stiffness of at least one elastic structure differs from that of at least one elastic structure, such as... Figure 7 The spring structure of the present invention adopts a multi-stage spring combination structure, that is, two or more springs with different stiffnesses are set between the inner lower cover and the compressor housing, which can form a stepped elastic adjustment system. By setting different spring stiffnesses and pre-compression amounts, the lower cover has different displacement response characteristics in different oil pressure ranges, thereby achieving more precise dynamic adjustment of the oil and improving the accuracy of adaptive adjustment of the second cover movement.

[0040] In some implementations... The elastic structure 5 includes a first elastic structure 6 and a second elastic structure 7. The stiffness of the first elastic structure 6 is less than that of the second elastic structure 7. The first elastic structure 6 and the second elastic structure 7 act at different positions of the second cover 2. When the weight of the lubricating oil at the upper end of the second cover 2 is less than a preset weight, the first elastic structure 6 provides dominant adjustment support for the second cover 2. When the weight of the lubricating oil at the upper end of the second cover 2 is greater than the preset weight, the second elastic structure 7 provides dominant adjustment support for the second cover 2.

[0041] This is a further preferred structural form of the elastic structure of the present invention, comprising two first and second elastic structures with different stiffnesses. The first elastic structure is a soft spring, and the second elastic structure is a hard spring, for example, as... Figure 7 Springs of different stiffness are positioned at different horizontal heights on the inner lower cover, resulting in varying pre-compression amounts. When the oil tank is relatively light, the softer springs (the first elastic structure) with lower stiffness dominate the adjustment, preventing the lower cover from moving excessively upwards and causing oil overflow or interruption of oil supply. When the oil tank is relatively heavy, the inner lower cover moves downwards under the influence of the oil tank's gravity, and the supporting force of the harder springs with higher stiffness gradually exceeds that of the softer springs. The supporting force of the harder springs (the second elastic structure) then dominates the adjustment, maintaining a stable oil supply at a low position for the lower cover. This further enhances the device's adaptability to complex working conditions and its adjustment accuracy.

[0042] The entire device of this invention requires no external control system and relies entirely on the dynamic balance between oil pressure and spring force to achieve automatic adjustment. It has a simple structure, rapid response, and strong adaptability, and is suitable for various compressor operating environments.

[0043] In some implementations... It also includes a guide post 8, which has a cavity inside; The guide post 8 is disposed at the inner bottom of the first cover 1, one end of the elastic structure 5 is inserted into the cavity of the guide post 8, and the other end of the elastic structure 5 is fixedly connected to the lower bottom of the second cover 2; or, the guide post 8 is disposed at the lower bottom of the second cover 2, one end of the elastic structure 5 is inserted into the cavity of the guide post 8, and the other end of the elastic structure 5 is fixedly connected to the inner bottom of the first cover 1.

[0044] This is a further preferred structural form of the lower cover assembly of the present invention. The guide post structure allows for an internal cavity to accommodate one end of the elastic structure, while the other end of the elastic structure can be connected to either the second cover or the first cover. This ensures that the guide post accommodates one end of the elastic structure, preventing the elastic structure from tilting during movement and ensuring a continuous and stable elastic force is output to the second cover. The guiding structure of this invention ensures operational stability: guide posts are introduced into the spring assembly to ensure the lower cover remains stable during displacement, avoiding uneven oil distribution or structural jamming caused by offset. Figure 6 The spring device is equipped with a guide post, and the inner cavity of the guide post is equipped with a spring and is fixedly connected to the inner lower cover to ensure that it moves vertically during displacement and avoids structural jamming or uneven oil flow caused by offset.

[0045] In some implementations... It also includes a support block 17, which is fixed to the other end of the elastic structure 5, and the support block 17 is fixed to the lower bottom of the second cover 2 or to the inner bottom of the first cover 1, so that the other end of the elastic structure 5 is fixed to the second cover 2 or the first cover 1 through the support block 17.

[0046] The present invention also preferably uses the aforementioned support block to form a fixed connection with the other end of the elastic structure. The support block is fixedly connected to the second cover or the first cover, which can ensure the fixed support of the other end of the elastic structure. The support block is preferably made of vibration damping material to improve the vibration damping effect.

[0047] In some implementations... The first cover 1 has a guide groove 9 on its inner peripheral wall and a guide member 10 on its outer peripheral side. The guide groove 9 extends vertically and the guide member 10 is engaged in the guide groove 9 so that it can move up and down along the extension direction of the guide groove 9, so that the second cover 2 can move up and down above the first cover 1. And / or, an oil guide groove 11 is also provided on the upper end surface of the second cover 2, the oil guide groove 11 extending from the center position of the upper end surface of the second cover 2 towards the surrounding edges.

[0048] The present invention also preferably provides a guide groove on the inner peripheral wall of the first cover and a guide member on the outer periphery of the second cover, so that the guide member is inserted into the guide groove to form a guiding movement, ensuring that the second cover can move up and down along the opening direction of the guide groove; the present invention further provides an oil guide groove on the second cover, which can evenly guide the oil to multiple positions on the upper end surface of the second cover, so that the oil is evenly distributed on the upper end surface of the second cover, thereby improving the oil storage capacity.

[0049] like Figure 4 The outer lower cover of the present invention is provided with a guide groove 9, which is embedded with the guide block (guide member 10) of the inner lower cover to ensure that the inner lower cover maintains vertical movement during displacement.

[0050] like Figure 5The inner lower cover is equipped with a guide block (guide component 10), and the guide groove between the inner lower cover guide block and the compressor housing has a sliding fit structure to ensure the smooth movement of the lower cover. The entire device does not require an external control system and relies entirely on the dynamic balance between oil pressure and spring force to achieve automatic adjustment. It has a simple structure, rapid response, and strong adaptability, and is suitable for various compressor operating environments.

[0051] This invention features multiple radial oil guide grooves on the surface of the inner lower cover. These grooves extend from the edge of the lower cover towards the center, forming channels to guide oil flow. The oil suction port is located above the center of the inner lower layer. When the inner lower cover moves upward, the oil guide grooves can more evenly guide the oil in the oil storage cavity to the area below the oil suction port, avoiding local oil accumulation or dead zones, thereby improving oil suction efficiency and lubrication uniformity.

[0052] The present invention also provides a compressor (preferably a scroll compressor), which includes the aforementioned compressor lower cover assembly, and further includes a pump body 12 and a motor 13. The pump body 12 includes the crankshaft 3, the lower end of the crankshaft 3 is spaced from the upper end face of the second cover 2, the lower end of the crankshaft 3 has the oil suction port 4, and the height of the upper end face of the second cover 2 can change with the operating frequency of the compressor, so that the oil suction port 4 can always be in contact with the lubricating oil on the upper end face of the second cover 2.

[0053] This invention provides a simple and responsive lubricating oil level regulating device to improve the lubrication reliability and operational stability of compressors under various operating conditions. The invention utilizes a lower cover assembly comprising a second cover capable of vertical movement, along with elastic structures to form a dynamic oil level regulating device. This allows for dynamic adjustment of the refrigerant oil level between the two lower cover structures, providing controllable space for oil distribution and achieving stable oil supply. A spring device connecting the inner lower cover to the compressor housing enables the lower cover to automatically move up and down according to oil pressure changes, achieving dynamic adjustment without external control and improving lubrication efficiency and system response speed. Furthermore, a guide post within the spring assembly ensures smooth operation of the lower cover during movement, preventing uneven oil distribution or structural jamming caused by misalignment, thus enhancing system stability.

[0054] In some implementations... It also includes an oil equalization pipe 14 and a housing 15. The pump body 12 and the motor 13 are both disposed inside the housing 15. The first cover 1 is connected to the lower end of the housing 15. The oil equalization pipe 14 is located outside the housing 15. One end of the oil equalization pipe 14 passes through the housing 15 and extends into the interior of the housing 15 and is located above the pump body 12. The other end of the oil equalization pipe 14 passes through the housing 15 and extends into the interior of the housing 15 and is located below the pump body 12 and above the second cover 2.

[0055] The present invention preferably uses an oil distribution pipe structure set on the outside of the housing to guide the lubricating oil above the pump body back to the position above the second cover, so that the lubricating oil can return to the upper end of the second cover after completing the lubrication of the pump body, motor and other structures, and then continue to be drawn into the crankshaft to complete the function and effect of circulating lubrication.

[0056] In some implementations... It also includes an oil guide tube 16 (preferably a capillary tube), one end of which is connected to the oil distribution tube 14, and the other end of which is connected to the internal cavity of the first cover 1, that is, to the bottom of the second cover 2.

[0057] Furthermore, the present invention can connect with the oil distribution pipe through the aforementioned oil guide pipe, allowing high-pressure oil to be introduced into the lower part of the second cover, ensuring that the lower end of the second cover can be subjected to sufficient force to move upward, avoiding the formation of a low-pressure area (or vacuum) below the second cover after it moves upward, which would prevent the second cover from moving up and down normally, and ensuring the performance of dynamic oil supply regulation for the compressor's adaptive frequency.

[0058] Alternative embodiments, such as Figure 8 In some implementation methods, It also includes an oil equalization pipe 14 and a housing 15. The pump body 12 and the motor 13 are both disposed inside the housing 15. The first cover 1 is connected to the lower end of the housing 15. The oil equalization pipe 14 is located outside the housing 15. One end of the oil equalization pipe 14 passes through the housing 15 and extends into the interior of the housing 15 and is located above the pump body 12. The other end of the oil equalization pipe 14 passes through the first cover 1 and extends into the internal cavity of the first cover 1, that is, it connects to the lower part of the second cover 2.

[0059] Furthermore, the present invention can introduce high-pressure oil into the lower part of the second cover through the aforementioned oil distribution pipe, ensuring that the lower end of the second cover can be subjected to sufficient force to move upward, avoiding the formation of a low-pressure area (or vacuum) below the second cover after it moves upward, which would prevent the second cover from moving up and down normally, and ensuring the performance of dynamic oil supply regulation for the compressor's adaptive frequency.

[0060] In some implementations... The inner bottom of the first cover 1 is provided with an upwardly protruding first protrusion 18 (preferably an annular structure), and the first protrusion 18 is provided with a vertically extending sliding groove. The lower bottom of the second cover 2 is provided with a second protrusion 19 (preferably an annular structure). At least part of the second protrusion 19 is inserted into the sliding groove so that it can move up and down along the extension direction of the sliding groove. The outer periphery of the first protrusion 18 and the inner wall of the first cover 1 form an accommodating space. The other end of the oil distribution pipe 14 is connected to the accommodating space. When an elastic structure 5 is also included, the elastic structure 5 is also provided in the accommodating space.

[0061] An alternative embodiment of the present invention further preferably provides first and second protrusions that cooperate with each other on the opposing surfaces of the first and second covers, which can form a relatively sealed space in the outer peripheral areas of the first and second protrusions. An elastic structure is provided in the relatively sealed accommodating space, and an oil equalization pipe is introduced to provide oil pressure to ensure that the force on the second cover is not reduced, thereby further effectively ensuring the performance of dynamic oil supply regulation of the compressor adaptive frequency.

[0062] This invention proposes an alternative embodiment: such as Figure 8 The capillary tube is eliminated, and the inner and outer lower covers are sealed by a sliding ring (second protrusion 19) and a sliding groove. The oil pipe is connected to the exhaust chamber, and the oil enters the spring device to enhance the upward thrust on the inner lower cover. This structure eliminates the capillary tube, making the structure simpler and more practical.

[0063] The present invention also provides an air conditioner that includes the aforementioned compressor.

[0064] The improvement of this invention is as follows: 1. Adopting a double-layer bottom cover structure: The inner bottom cover and the outer bottom cover form an oil storage cavity that can hold lubricating oil, providing physical space for dynamic adjustment of the oil.

[0065] 2. Introducing a spring device to achieve automatic adjustment function: The inner lower cover is connected to the compressor housing through a spring device, which enables it to move up and down automatically according to changes in oil pressure, thereby achieving dynamic adjustment of the oil position.

[0066] 3. The design of the lower cover can be moved upward to improve oil suction efficiency: Under high speed conditions, a large amount of refrigeration oil is sucked into the air conditioning system and cannot be returned in time, resulting in a lighter oil sump. The spring device pushes the inner lower cover upward to concentrate the oil near the oil suction port and improve oil suction efficiency. Under low pressure difference conditions, the spring keeps the lower cover in a low position to ensure a stable oil supply.

[0067] 4. Structural responsiveness and strong adaptability: This device can automatically respond according to the operating status without the need for an external control system, adapting to various working conditions and improving the lubrication reliability of the compressor.

[0068] 5. Guide structure ensures operational stability: Guide columns are introduced into the spring assembly to ensure that the lower cover remains stable during displacement, avoiding uneven oil distribution or structural jamming caused by displacement.

[0069] 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 lower cover assembly for a compressor, characterized in that: include: The first cover (1) and the second cover (2) are provided. The first cover (1) has an internal cavity. The second cover (2) is located in the internal cavity. The upper end face of the second cover (2) forms an oil storage end face that can store oil. The second cover (2) can move up and down in the internal cavity. The movement of the second cover (2) can change with the operating frequency of the compressor, so that the height of the upper end face of the second cover (2) can change with the operating frequency of the compressor, so that the oil suction port (4) of the compressor crankshaft (3) can always contact the lubricating oil on the second cover (2). When the operating frequency of the compressor increases, the amount of lubricating oil drawn into the oil suction port (4) of the crankshaft (3) increases, and the amount of lubricating oil on the upper surface of the second cover (2) decreases. At this time, the second cover (2) can move upward to reduce the distance between the upper surface of the second cover (2) and the oil suction port (4); when the operating frequency of the compressor decreases, the amount of lubricating oil drawn into the oil suction port (4) of the crankshaft (3) decreases, and the amount of lubricating oil on the upper surface of the second cover (2) increases. At this time, the second cover (2) can move downward to increase the distance between the upper surface of the second cover (2) and the oil suction port (4). An elastic structure (5) is also provided in the internal cavity of the first cover (1). The elastic structure (5) is connected between the first cover (1) and the second cover (2). The elastic structure (5) can apply an upward elastic thrust to the second cover (2).

2. The lower cover assembly of the compressor according to claim 1, characterized in that: When the operating frequency of the compressor increases, the amount of lubricating oil at the upper end of the second cover (2) decreases, the downward gravity of the lubricating oil on the second cover (2) decreases, and the second cover (2) moves upward under the combined force of its gravity and the elastic force of the elastic structure (5), reducing the distance between the upper end face of the second cover (2) and the oil suction port (4), so that the lubricating oil at the upper end of the second cover (2) is always connected to the oil suction port (4); When the operating frequency of the compressor decreases, the amount of lubricating oil at the upper end of the second cover (2) increases, the downward gravity of the lubricating oil on the second cover (2) increases, and the second cover (2) moves downward under the combined force of its gravity and the elastic force of the elastic structure (5), increasing the distance between the upper end face of the second cover (2) and the oil suction port (4), so that the lubricating oil at the upper end of the second cover (2) is always connected to the oil suction port (4).

3. The lower cover assembly of the compressor according to claim 1, characterized in that: The elastic structure (5) is at least two, and at least one elastic structure has a different stiffness from at least one elastic structure.

4. The lower cover assembly of the compressor according to claim 3, characterized in that: The elastic structure (5) includes a first elastic structure (6) and a second elastic structure (7). The stiffness of the first elastic structure (6) is less than that of the second elastic structure (7). The first elastic structure (6) and the second elastic structure (7) act on different positions of the second cover (2). When the weight of the lubricating oil at the upper end of the second cover (2) is less than the preset weight, the first elastic structure (6) provides the dominant adjustment support for the second cover (2). When the weight of the lubricating oil at the upper end of the second cover (2) is greater than the preset weight, the second elastic structure (7) provides the dominant adjustment support for the second cover (2).

5. The lower cover assembly of the compressor according to claim 1, characterized in that: It also includes a guide post (8), the guide post (8) having a cavity inside; The guide post (8) is disposed at the inner bottom of the first cover (1), one end of the elastic structure (5) is inserted into the cavity of the guide post (8), and the other end of the elastic structure (5) is fixedly connected to the lower bottom of the second cover (2); or, the guide post (8) is disposed at the lower bottom of the second cover (2), one end of the elastic structure (5) is inserted into the cavity of the guide post (8), and the other end of the elastic structure (5) is fixedly connected to the inner bottom of the first cover (1).

6. The lower cover assembly of the compressor according to claim 5, characterized in that: It also includes a support block (17), which is fixed to the other end of the elastic structure (5), and the support block (17) is fixed to the lower bottom of the second cover (2) or the inner bottom of the first cover (1), so that the other end of the elastic structure (5) is fixed to the second cover (2) or the first cover (1) through the support block (17).

7. The lower cover assembly of the compressor according to claim 1, characterized in that: The inner peripheral wall of the first cover (1) is provided with a guide groove (9), and the outer peripheral wall of the second cover (2) is provided with a guide member (10). The guide groove (9) extends in the vertical direction, and the guide member (10) is engaged in the guide groove (9) so that it can move up and down along the extension direction of the guide groove (9), so that the second cover (2) can move up and down above the first cover (1). And / or, an oil guide groove (11) is also provided on the upper surface of the second cover (2), the oil guide groove (11) extending from the center of the upper surface of the second cover (2) toward the surrounding edges.

8. A compressor, characterized in that: The compressor lower cover assembly including any one of claims 1-7 further includes a pump body (12) and a motor (13), the pump body (12) including the crankshaft (3), the lower end of the crankshaft (3) being spaced from the upper end face of the second cover (2), the lower end of the crankshaft (3) having the oil suction port (4), the height of the upper end face of the second cover (2) being able to change with the operating frequency of the compressor, so that the oil suction port (4) is always in contact with the lubricating oil on the upper end face of the second cover (2).

9. The compressor according to claim 8, characterized in that: It also includes an oil equalization pipe (14) and a housing (15). The pump body (12) and the motor (13) are both located inside the housing (15). The first cover (1) is connected to the lower end of the housing (15). The oil equalization pipe (14) is located outside the housing (15). One end of the oil equalization pipe (14) passes through the housing (15) and extends into the interior of the housing (15) and is located above the pump body (12). The other end of the oil equalization pipe (14) passes through the housing (15) and extends into the interior of the housing (15) and is located below the pump body (12) and above the second cover (2).

10. The compressor according to claim 9, characterized in that: It also includes an oil guide pipe (16), one end of which is connected to the oil equalization pipe (14), and the other end of which is connected to the internal cavity of the first cover (1), that is, connected to the bottom of the second cover (2).

11. The compressor according to claim 8, characterized in that: It also includes an oil equalization pipe (14) and a housing (15). The pump body (12) and the motor (13) are both located inside the housing (15). The first cover (1) is connected to the lower end of the housing (15). The oil equalization pipe (14) is located outside the housing (15). One end of the oil equalization pipe (14) passes through the housing (15) and extends into the interior of the housing (15) and is located above the pump body (12). The other end of the oil equalization pipe (14) passes through the first cover (1) and extends into the internal cavity of the first cover (1), that is, it connects to the lower part of the second cover (2).

12. The compressor according to claim 11, characterized in that: The inner bottom of the first cover (1) is provided with an upwardly protruding first protrusion (18), and the first protrusion (18) is provided with a vertically extending sliding groove. The lower bottom of the second cover (2) is provided with a second protrusion (19), and at least part of the structure of the second protrusion (19) is inserted into the sliding groove so that it can move up and down along the extension direction of the sliding groove. The outer periphery of the first protrusion (18) and the inner wall of the first cover (1) form an accommodating space. The other end of the oil equalization pipe (14) is connected to the accommodating space. When an elastic structure (5) is also included, the elastic structure (5) is also provided in the accommodating space.

13. An air conditioner, characterized in that: The compressor includes any one of claims 8-12.

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