Scroll compressor

Abstract

The utility model relates to a scroll compressor, the scroll compressor includes: compression mechanism, compression mechanism is limited in the inside of compression mechanism for inhaling, compressing and discharging a series of working cavity of working fluid, and main bearing seat, main bearing seat supports compression mechanism, and main bearing seat includes the recess containing lubricating oil, wherein, the scroll compressor still includes oil guide structure, and the oil guide structure includes the oil inlet part of communication with the recess, the oil outlet part of communication with the working cavity and the oil guide pipe of communication with the oil inlet part and the oil outlet part, so that lubricating oil can flow into the working cavity from the recess through the oil inlet part, the oil guide pipe and the oil outlet part, wherein, the oil guide pipe is arranged in the internal space of scroll compressor. According to the oil guide structure of the utility model's scroll compressor, it is easy to process and assemble, is not easy to be damaged and can improve the lubrication effect of the contact surface of the fixed scroll and the moving scroll in the working cavity.

Description

Technical Field

[0001] This utility model relates to the field of scroll compressors, and in particular to the oil guiding structure of scroll compressors. Background Technology

[0002] The content in this section provides only background information related to this disclosure and may not constitute prior art.

[0003] A scroll compressor typically includes a compression mechanism, a main bearing housing, and a drive shaft. The main bearing housing supports the moving scroll component of the compression mechanism via a thrust plate. The moving scroll component rotates relative to the stationary scroll component of the compression mechanism to define a series of working chambers between the moving and stationary scroll components for drawing in, compressing, and discharging the working fluid. During the operation of the scroll compressor, the stationary and moving scroll components come into contact with each other, causing wear on their contact surfaces, which can sometimes be quite severe.

[0004] In related technologies, lubricating oil is supplied to the working chamber through an oil supply channel provided in the moving scroll end plate of the moving scroll component to lubricate the contact surfaces of the stationary scroll component and the moving scroll component within the working chamber. Figure 1 Regarding the aforementioned lubrication methods, among which, Figure 1 A partial cross-sectional view of a scroll compressor of the related technology is shown (components such as the housing are not shown). Figure 1 As shown, the scroll compressor includes a compression mechanism consisting of a fixed scroll 100 and a moving scroll 200, a main bearing housing 300, and a drive shaft 400. An oil supply channel is provided in the moving scroll end plate 201 of the moving scroll 200. This oil supply channel includes an oil inlet 202, a transverse hole 203, and an oil outlet 204. The oil inlet 202 communicates with the space surrounded by the hub of the moving scroll end plate 201. The transverse hole 203 provides fluid communication between the oil inlet 202 and the oil outlet 204, and the oil outlet 204 communicates with the working chamber. During the operation of the scroll compressor, referring to the lubricating oil flow path indicated by the arrows shown in the figure, the lubricating oil is supplied from the oil sump (not shown) at the bottom of the scroll compressor through the oil supply channel provided in the drive shaft 400 to the space surrounded by the hub of the moving scroll end plate 201, then enters the oil supply channel through the oil inlet 202, flows through the transverse hole 203, and finally enters the working chamber through the oil outlet 204 to lubricate the contact surfaces of the stationary scroll 100 and the moving scroll 200 in the working chamber.

[0005] The problems with this oil supply channel in the related technology are that it is difficult to manufacture and has many dimensional limitations. For example, the length of the transverse hole cannot be too long, otherwise the drill bit used to manufacture the transverse hole will break; the circumferential angle of the transverse hole and the oil outlet hole is limited; the dimensions of the transverse hole and the vertical oil inlet and outlet holes are generally different, requiring drill bits of multiple sizes for manufacturing; and the manufacturing cycle is long. This makes it impossible to set the oil outlet hole of the oil supply channel in the optimal position, thus affecting the effective oil supply of the oil supply channel. In addition, the oil supply to the compression mechanism is greatly affected by the rotational speed. If the rotational speed is high, the oil supply is too large, resulting in an excessively high oil circulation rate; if the rotational speed is low, the oil supply is too small, resulting in insufficient lubrication between the stationary and moving scroll components, and accelerated wear. Therefore, the oil supply channel of the related technology is difficult to manufacture and cannot ensure effective lubrication of the contact surfaces of the stationary and moving scroll components within the working chamber.

[0006] Therefore, there is a need for an improved scroll compressor with an improved oil guiding structure that is easy to machine and can improve the lubrication of the contact surfaces of the stationary and moving scroll components within the working chamber. Utility Model Content

[0007] This section provides a general summary of the present invention, rather than a full disclosure of the complete scope or all features of the present invention.

[0008] The purpose of this invention is to solve or alleviate at least one of the technical problems mentioned above. For example, the technical solution of this invention can provide a scroll compressor with an improved oil guiding structure, which is easy to process and assemble and can improve the lubrication effect on the contact surfaces of the stationary scroll and the moving scroll in the working chamber.

[0009] To address one or more of the technical problems mentioned above, according to one aspect of the present invention, a scroll compressor is provided, comprising: a compression mechanism having a series of working chambers defined within the compression mechanism for drawing in, compressing, and discharging working fluid; and a main bearing housing supporting the compression mechanism, the main bearing housing including a recess for receiving lubricating oil, wherein the scroll compressor further includes an oil guiding structure, the oil guiding structure including an oil inlet portion communicating with the recess, an oil outlet portion communicating with the working chamber, and an oil guide pipe communicating with the oil inlet portion and the oil outlet portion, such that lubricating oil can flow from the recess through the oil inlet portion, the oil guide pipe, and the oil outlet portion into the working chamber, wherein the oil guide pipe is disposed within the internal space of the scroll compressor.

[0010] In the aforementioned scroll compressor, the oil guide pipe includes an inlet end and an outlet end, wherein the inlet end is connected to the oil inlet section and the outlet end is connected to the oil outlet section.

[0011] In the aforementioned scroll compressor, a sealing structure is provided between the oil inlet section and the inlet end of the oil guide pipe, and between the oil outlet section and the outlet end of the oil guide pipe.

[0012] In the aforementioned scroll compressor, a recess is formed in the main bearing housing body of the main bearing housing, and the oil inlet portion is constructed as an oil discharge channel formed in the main bearing housing body. The oil discharge channel is constructed to extend from the recess to the outside of the main bearing housing, so that the lubricating oil in the recess can be discharged from the main bearing housing through the oil discharge channel.

[0013] In the aforementioned scroll compressor, the oil drain passage is formed in the side portion of the main bearing housing body and extends laterally in the side portion; or the oil drain passage is formed in the bottom portion of the main bearing housing body and extends vertically in the bottom portion.

[0014] In the aforementioned scroll compressor, the scroll compressor includes a moving scroll component, which includes a moving scroll end plate. The oil outlet portion is constructed as a hole structure formed in the moving scroll end plate. The hole structure includes horizontal holes and vertical holes that are interconnected. The horizontal holes extend radially inward from the outer side of the moving scroll end plate, and the vertical holes are connected to the working chamber, so that the lubricating oil discharged from the outlet end of the oil guide pipe can enter the working chamber through the hole structure.

[0015] In the aforementioned scroll compressor, the oil guide pipe is a flexible hose.

[0016] In the aforementioned scroll compressor, the scroll compressor includes a fixed scroll component, which includes a fixed scroll end plate and an outer peripheral wall extending vertically from the fixed scroll end plate. The oil outlet portion is constructed as an outer peripheral wall hole formed in the outer peripheral wall. The outer peripheral wall hole is constructed to penetrate the outer peripheral wall and communicate with the working chamber, so that the lubricating oil discharged from the outlet end of the oil guide pipe can enter the working chamber through the outer peripheral wall hole.

[0017] In the aforementioned scroll compressor, the oil guide pipe is either a rigid pipe or a flexible pipe.

[0018] In the aforementioned scroll compressor, the oil guide pipe includes a U-shaped oil storage section.

[0019] In the aforementioned scroll compressor, the U-shaped oil storage section is vertically lower than the oil inlet section.

[0020] In the aforementioned scroll compressor, the working chamber connected to the oil outlet section is the suction chamber among a series of working chambers.

[0021] In the aforementioned scroll compressor, the scroll compressor includes a main bearing housing oil return pipe. The main bearing housing oil return pipe is configured to allow lubricating oil to flow back from the recess through the main bearing housing oil return pipe to the bottom oil sump of the scroll compressor. The main bearing housing oil return pipe constitutes an oil inlet section. The inlet end of the guide pipe is connected to the main bearing housing oil return pipe, so that some of the lubricating oil in the main bearing housing oil return pipe can flow into the guide pipe.

[0022] In the aforementioned scroll compressor, the scroll compressor includes a main bearing housing oil return pipe, the main bearing housing includes an oil return channel, and the main bearing housing oil return pipe is connected to the oil return channel, so that lubricating oil can flow back from the recess to the bottom oil sump of the scroll compressor. The port of the oil return channel that communicates with the recess is vertically higher than the port of the oil inlet that communicates with the recess.

[0023] In the aforementioned scroll compressor, the oil guide structure is configured such that the oil inlet pressure at the oil inlet section of the oil guide structure is greater than the oil outlet pressure at the oil outlet section, and the difference between the oil inlet pressure and the oil outlet pressure is sufficient to overcome the gravity of the lubricating oil so that the lubricating oil can flow from the recess into the working chamber.

[0024] The advantages of the scroll compressor according to this invention are at least as follows. The scroll compressor according to this invention includes an oil guiding structure, which is easy to process and assemble, reducing manufacturing costs. The oil outlet portion of the oil guiding structure is flexibly positioned, and the size of the oil guiding structure can be flexibly adjusted as needed. This ensures that an appropriate amount of lubricating oil enters the working chamber through the oil guiding structure under different operating conditions, providing more effective lubrication to the contact surfaces of the stationary and moving scroll components within the working chamber. Furthermore, the oil guiding structure is entirely disposed within the internal space of the scroll compressor. Compared to related solutions where the oil guiding structure is partially disposed on the outside of the scroll compressor, this simplifies the structure and manufacturing by avoiding additional perforations to the compressor housing, and also avoids the risk of the oil guiding mechanism being easily touched and damaged due to its partial external placement. Attached Figure Description

[0025] The following figures illustrate the technical features of related technologies and one or more embodiments of the scroll compressor of this utility model, in which:

[0026] Figure 1 This is a partial cross-sectional view of a scroll compressor based on related technologies;

[0027] Figure 2 This is a partial cross-sectional view of a scroll compressor according to the first embodiment of the present invention;

[0028] Figure 3 This is a partial cross-sectional view of a scroll compressor according to the second embodiment of the present invention;

[0029] Figure 4 It is along Figure 3 The top cross-sectional view of the scroll compressor according to the second embodiment of the present invention is taken by line AA in the figure.

[0030] Figure 5 This is a partial cross-sectional view of a scroll compressor according to the first variant of the second embodiment of the present invention;

[0031] Figure 6 This is a partial cross-sectional view of a scroll compressor of a second variant according to the second embodiment of the present invention; and

[0032] Figure 7 This is a partial cross-sectional view of a scroll compressor according to a third variation of the second embodiment of the present invention. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the present invention or its applications or uses. Furthermore, the same reference numerals are used to denote the same components in the accompanying drawings of the various embodiments.

[0034] This utility model provides a scroll compressor, which includes an oil guiding structure. The oil guiding structure includes an oil inlet portion communicating with the recess of the main bearing housing of the scroll compressor, an oil outlet portion communicating with the working chamber of the scroll compressor, and an oil guide pipe located between and connecting the oil inlet portion and the oil outlet portion. Through this oil guiding structure, lubricating oil can flow from the recess of the main bearing housing through the oil inlet portion, the oil guide pipe and the oil outlet portion of the oil guiding structure in sequence to enter the working chamber, so as to lubricate the contact surfaces of the stationary scroll component and the moving scroll component of the scroll compressor in the working chamber.

[0035] Figure 2 This is a partial cross-sectional view of a scroll compressor according to a first embodiment of the present invention, which mainly shows the compression chamber and main bearing housing of the scroll compressor. In the following text, reference will be made to... Figure 2 The overall structure and working principle of the oil guide structure for a scroll compressor according to the first embodiment of the present invention are briefly described.

[0036] like Figure 2As shown, a scroll compressor may include a fixed scroll 10, a moving scroll 20, a main bearing housing 30, and a drive shaft 40. In the scroll compressor, the fixed scroll 10 and the moving scroll 20 constitute a compression mechanism suitable for compressing the working fluid, and the compression mechanism internally defines a series of working chambers for drawing in, compressing, and discharging the working fluid. The main bearing housing 30 includes a thrust plate 31 and a main bearing housing body 32, wherein the thrust plate 31 contacts and supports the moving scroll end plate 21 of the moving scroll 20, thereby being suitable for supporting the compression mechanism, and the main bearing housing body 32 has a recess 33 formed for receiving lubricating oil. In this embodiment, the thrust plate 31 and the main bearing housing body 32 are separate, but they can also be integrated. The drive shaft 40 is driven to rotate by a drive mechanism (not shown) so that the moving scroll member 20 rotates relative to the fixed scroll member 10 in a translational motion (i.e., the central axis of the moving scroll member revolves around the central axis of the fixed scroll member, but the moving scroll member itself does not rotate around its own central axis), thereby defining a series of working chambers between the moving scroll member 20 and the fixed scroll member 10. An oil supply channel (not shown) is provided in the drive shaft 40 so that lubricating oil in the oil sump located at the bottom of the scroll compressor can be pumped, for example by an oil pump (not shown), through the oil supply channel into the recess 33 of the main bearing housing 30. The scroll compressor also includes an oil guiding structure comprising an oil inlet portion communicating with the recess 33, an oil outlet portion communicating with the working chamber, and an oil guide pipe 52 located between and connecting the oil inlet portion and the oil outlet portion. In this embodiment, preferably, the oil outlet portion communicates with the suction chamber in the working chamber, which is a negative pressure zone, to facilitate the entry of lubricating oil from the oil outlet portion into the suction chamber. In this embodiment, the oil inlet portion is configured as an oil drain channel 51 formed in the main bearing housing body 32. The oil drain channel 51 is formed in the side portion of the main bearing housing body 32 and extends laterally through the side portion, thereby extending from the recess 33 to the outside of the main bearing housing 30, so that the lubricating oil in the recess 33 can be discharged from the main bearing housing 30 through the oil drain channel 51. In this embodiment, the oil outlet portion is configured as a hole structure 53 formed in the moving scroll end plate 21. The hole structure 53 includes a horizontal hole 531 and a vertical hole 532 that communicate with each other. The horizontal hole 531 extends laterally in a radially inward direction from the outer side of the moving scroll end plate 21, and the vertical hole 532 extends vertically from the horizontal hole 531 to the suction chamber and opens at the bottom of the suction chamber to communicate with the suction chamber. Thus, the lubricating oil outside the moving scroll end plate 21 can enter the suction chamber through the hole structure 53, and enter other working chambers, such as the compression chamber and the discharge chamber, during the operation of the scroll compressor, thereby lubricating the contact surfaces of the stationary scroll 10 and the moving scroll 20 throughout the entire working chamber.The oil guide pipe 52 includes an inlet end 521 and an outlet end 522. The inlet end 521 can be inserted into the oil discharge channel 51 and is securely fitted therein, for example, by an interference fit. The outlet end 522 can be inserted into the transverse hole 531 of the hole structure 53 and is securely fitted therein, for example, by an interference fit, so that it will not fall out of the transverse hole 531 when the moving scroll member 10 rotates relative to the stationary scroll member 20. Sealing structures can also be provided between the inlet end 521 and the oil inlet portion of the oil guide pipe 52, and between the outlet end 522 and the oil outlet portion of the oil guide pipe 52, to prevent lubricating oil leakage. In this embodiment, the sealing structure is implemented as a sealing ring 54 abutting against the inlet end 521 and the oil discharge channel 51, and a sealing ring 55 abutting against the outlet end 522 and the transverse hole 531. The oil guide pipe 52 is disposed within the internal space of the scroll compressor, that is, within the casing (not shown) of the scroll compressor. Therefore, the oil guiding structure can be completely housed within the internal space of the scroll compressor, simplifying the structure and manufacturing by avoiding additional perforations to the compressor housing. Furthermore, the housing protects the oil guiding structure, preventing the risk of it being easily touched and damaged due to its partial location outside the scroll compressor. In this embodiment, the oil guiding pipe 52 can be a flexible hose and may include a U-shaped oil storage portion 523 for storing lubricating oil. The U-shaped oil storage portion 523 of the oil guiding pipe 52 may be lower than the oil discharge channel 51 in the vertical direction. The inner diameters of the oil inlet, oil guiding pipe, and oil outlet portions of the oil guiding structure can be adjusted to control the oil supply of the oil guiding structure. In this embodiment, the main bearing housing of the scroll compressor also includes a return oil channel (not shown) located at a different position from the oil discharge channel. This return oil channel can be located in the thrust plate of the main bearing housing and penetrates the side portion of the thrust plate, communicating with both the recess and the outside of the main bearing housing, allowing the lubricating oil in the recess to flow to the outside of the main bearing housing via the return oil channel. The scroll compressor also includes a main bearing housing oil return pipe (not shown), which can be connected to an oil return channel, for example, inserted into and securely fitted within the oil return channel, allowing lubricating oil to flow back from the recess through the oil return channel and the main bearing housing oil return pipe to the bottom oil sump of the scroll compressor. The port of the oil return channel communicating with the recess can be vertically higher than the port of the oil inlet section (i.e., the oil outlet channel) of the oil guide structure communicating with the recess, so that when lubricating oil accumulates in the recess, it will preferentially enter the working chamber of the scroll compressor via the oil guide structure for lubrication.

[0037] Below, refer to Figure 2 The working principle of the oil guide structure of the scroll compressor according to the first embodiment of the present invention will be described in detail.

[0038] like Figure 2As shown, lubricating oil from the oil sump at the bottom of the scroll compressor is pumped by an oil pump through the oil supply channel of the drive shaft 40 and into the recess 33 of the main bearing housing 30. The oil guide structure is configured such that during the operation of the scroll compressor, the pressure in the recess 33 (i.e., the inlet pressure at the oil inlet section of the oil guide structure) is P1, while the pressure in the suction chamber of the scroll compressor (i.e., the outlet pressure at the outlet section) is P2. During one working cycle of the scroll compressor, P1 is greater than P2 for approximately 3 / 4 of the time, and the pressure difference ΔP between P1 and P2 is sufficient for the lubricating oil in the recess to overcome its own gravity and flow from the recess 33 through the oil guide structure into the suction chamber. Therefore, when the lubricating oil level in the recess 33 is higher than the oil drain channel 51 of the oil guide structure in the longitudinal direction and P1 is greater than P2, the lubricating oil flows from the recess 33 into the oil drain channel 51 under the action of the pressure difference ΔP. It then flows radially outward and enters the oil guide pipe 52 through the inlet end 521 of the oil guide pipe 52 inserted in the oil drain channel 51. The lubricating oil first flows vertically downward in the oil guide pipe 52 to the U-shaped oil reservoir 523, and then flows vertically upward from the U-shaped oil reservoir to the outlet end 522. Subsequently, the lubricating oil enters the horizontal hole 531 through the outlet end 522 inserted into the horizontal hole 531 of the hole structure 53, and flows radially inward in the horizontal hole 531 to the vertical hole 532 communicating with the horizontal hole 531. Then, it flows vertically upward in the vertical hole 532 into the suction chamber, and enters other working chambers, such as the compression chamber and the discharge chamber, during the operation of the scroll compressor, thereby lubricating the contact surfaces of the stationary scroll component 10 and the moving scroll component 20 of the scroll compressor throughout the entire working chamber. During the time period P1 is not greater than P2, the lubricating oil in the oil guiding structure still has a certain kinetic energy, allowing a small amount of lubricating oil to flow into the suction chamber by inertia. Thus, the oil guiding structure of the scroll compressor according to the first embodiment of the present invention can ensure that an appropriate amount of lubricating oil effectively lubricates the contact surfaces of the stationary scroll component and the moving scroll component within the working chamber. Compared with the oil supply channels of related technologies, the oil guiding structure of the scroll compressor according to the first embodiment of the present invention is easier to process and assemble, and therefore has a lower manufacturing cost. In addition, since the oil guide pipe is located inside the scroll compressor, the oil guide structure is completely located inside the scroll compressor. This avoids the need for additional perforation of the scroll compressor housing, simplifying the structure and manufacturing. Furthermore, the housing can also protect the oil guide structure, thus avoiding the risk of the oil guide mechanism being easily touched and damaged because it is partially located on the outside.Furthermore, the position of the oil outlet section of the oil guide structure, as well as the inner diameters of the oil inlet, guide pipe, and outlet sections, can be flexibly adjusted according to actual needs. The oil outlet section can be positioned optimally, and the inner diameters of each part of the oil guide structure can be adjusted to ensure an appropriate amount of lubricating oil enters the working chamber for effective lubrication of the contact surfaces between the stationary and moving scroll components. Additionally, this oil guide structure utilizes the lubricating oil in the recess of the main bearing housing of the scroll compressor for lubrication, rather than having the lubricating oil discharged from the drive shaft's oil supply channel directly enter the oil supply channel and flow into the working chamber. Therefore, the oil supply is less affected by the scroll compressor's rotational speed, avoiding the problem of excessively high oil circulation rates at high speeds and insufficient oil supply at low speeds. Moreover, this oil guide structure does not directly distribute the lubricating oil discharged from the drive shaft's oil supply channel, preventing insufficient lubrication of the drive shaft bearings and the thrust plate of the main bearing housing. In addition, the oil guiding structure includes a U-shaped oil storage section for storing oil, which allows the lubricating oil stored in the U-shaped oil storage section to enter the working chamber more quickly when the scroll compressor starts running, reducing the risk of wear of the fixed scroll and moving scroll components due to lack of lubricating oil in the working chamber when the scroll compressor starts.

[0039] Figure 3 This is a partial cross-sectional view of a scroll compressor according to the second embodiment of the present invention. Figure 4 It is along Figure 3 The image shows a top cross-sectional view of the scroll compressor according to the second embodiment of the present invention, taken by line AA. In the following text, reference will be made to... Figure 3 and Figure 4 This paper provides a brief description of the overall structure of the oil guide structure of the scroll compressor according to the second embodiment of the present invention. The main difference between the oil guide structure of the second embodiment of the scroll compressor according to the present invention and the oil guide structure according to the first embodiment is the position of the oil outlet portion of the oil guide structure. The other configurations of the oil guide structure are basically the same, and the working principle is also roughly the same. Therefore, relevant descriptions will be simplified or omitted.

[0040] like Figure 3As shown, a scroll compressor may include a stationary scroll 10, a moving scroll 20, a main bearing housing 30, and a drive shaft 40. In the scroll compressor, the stationary scroll 10 and the moving scroll 20 constitute a compression mechanism suitable for compressing a working fluid, and the compression mechanism defines a series of working chambers within it for drawing in, compressing, and discharging the working fluid. The stationary scroll 10 includes a stationary scroll end plate 11 and an outer peripheral wall 12 extending vertically from the stationary scroll end plate 11 toward the working chamber. The main bearing housing 30 includes a thrust plate 31 and a main bearing housing body 32, in which a recess 33 for receiving lubricating oil is formed. The scroll compressor also includes an oil guiding structure, which includes an oil inlet portion communicating with the recess 33, an oil outlet portion communicating with the working chamber, and an oil guide pipe 62 located between and communicating with the oil inlet portion and the oil outlet portion. The oil inlet is constructed as an oil discharge channel 61 formed in the side portion of the main bearing housing body 32, while the oil outlet is constructed as an outer peripheral wall hole 63 formed in the outer peripheral wall 12 of the fixed scroll member 10. This outer peripheral wall hole 63 extends laterally and penetrates the outer peripheral wall 12, thereby communicating with the outside of the fixed scroll end plate 11 and the suction chamber, respectively. Thus, lubricating oil from the outside of the fixed scroll end plate 11 can enter the suction chamber through the outer peripheral wall hole 63, and during the operation of the scroll compressor, enter other working chambers, such as the compression chamber and the discharge chamber, thereby lubricating the contact surfaces of the fixed scroll member 10 and the moving scroll member 20 throughout the entire working chamber. Figure 4 As shown, preferably, the oil outlet portion communicates with the suction chamber SC in the working chamber, which is a negative pressure zone to facilitate the entry of lubricating oil from the oil outlet portion into the suction chamber. The oil guide pipe 62 includes an inlet end 621 and an outlet end 622. The inlet end 621 can be inserted into and securely fitted into the oil discharge channel 61, and the outlet end 622 can be inserted into the outer peripheral wall hole 63 and securely fitted into it, for example, by an interference fit. Sealing structures can also be provided between the inlet end 621 and the oil inlet portion of the oil guide pipe 62, and between the outlet end 622 and the oil outlet portion of the oil guide pipe 62, to prevent lubricating oil leakage. The oil guide pipe 62 is disposed within the internal space of the scroll compressor, i.e., within the casing (not shown) of the scroll compressor. In this embodiment, the oil guide pipe 62 can be a flexible hose or a rigid pipe, and may include a U-shaped oil reservoir portion 623 for storing lubricating oil in the oil guide pipe 62.

[0041] Compared with the oil guiding structure of the scroll compressor according to the first embodiment, in the oil guiding structure of the scroll compressor according to the second embodiment, since the oil outlet is located in the stationary scroll member rather than the moving scroll member, the connection between the oil guide pipe and the oil outlet is more stable and less likely to be disconnected.

[0042] Figures 5-7Various modifications of the oil guide structure of the scroll compressor according to the second embodiment of the present invention are shown. These modifications of the oil guide structure of the scroll compressor are related to... Figure 3 The only difference between the oil guide structures of the scroll compressors shown is the positioning of the oil inlet section and the shape of the oil guide pipe. The other configurations and working principles of the oil guide structures are basically the same, so the relevant descriptions will be simplified or omitted.

[0043] Figure 5 This is a partial cross-sectional view of a scroll compressor according to a first variant of the second embodiment of the present invention. As shown, the oil guiding structure of the scroll compressor includes an oil inlet portion communicating with a recess in the main bearing housing, an oil outlet portion communicating with the working chamber of the scroll compressor, and an oil guide pipe 72 located between and communicating with the oil inlet portion and the oil outlet portion. The oil inlet portion is configured as an oil discharge channel 71 formed in the bottom portion of the main bearing housing body of the main bearing housing. The oil discharge channel 71 extends vertically in the bottom portion to penetrate the bottom portion, thereby extending from the recess to the outside of the main bearing housing, so that the lubricating oil in the recess can be discharged from the main bearing housing through the oil discharge channel 71. The oil outlet portion is configured as an outer peripheral wall hole 73 formed in the outer peripheral wall of the fixed scroll member. The oil guide pipe 72 includes an inlet end 721 and an outlet end 722. The inlet end 722 can be inserted into and securely fitted into the oil discharge channel 71, and the outlet end 722 can be inserted into and securely fitted into the outer peripheral wall hole 73. Sealing structures can also be provided between the inlet end 721 and the oil inlet portion of the oil guide pipe 72, and between the outlet end 722 and the oil outlet portion of the oil guide pipe 72, to prevent lubricating oil leakage. The oil guide pipe 72 is disposed within the internal space of the scroll compressor, that is, within the casing (not shown) of the scroll compressor.

[0044] Compared to the oil guiding structure of the scroll compressor according to the second embodiment, in the oil guiding structure of the scroll compressor of the first variant according to the second embodiment, since the oil inlet portion of the oil guiding structure is located in the bottom portion of the main bearing housing body, even when there is less lubricating oil in the recess, the lubricating oil can still enter the working chamber of the scroll compressor through the oil guiding structure for lubrication.

[0045] Figure 6This is a partial cross-sectional view of a scroll compressor according to a second variation of the second embodiment of the present invention. As shown, the oil guiding structure of the scroll compressor includes an oil inlet portion communicating with a recess in the main bearing housing, an oil outlet portion communicating with the working chamber of the scroll compressor, and an oil guide pipe 82 located between and communicating with the oil inlet portion and the oil outlet portion. The oil inlet portion is configured as an oil discharge channel 81 formed in a side portion of the main bearing housing body of the main bearing housing. The oil discharge channel 81 is configured to communicate with the recess at the lower portion of the recess and extend laterally through the side portion, thereby extending from the recess to the outside of the main bearing housing, so that the lubricating oil in the recess can be discharged from the main bearing housing through the oil discharge channel 81. The oil outlet portion is configured as an outer peripheral wall hole 83 formed in the outer peripheral wall of the fixed scroll member. The oil guide pipe 82 includes an inlet end 821 and an outlet end 822. The inlet end 822 can be inserted into and securely fitted into the oil discharge channel 81, and the outlet end 822 can be inserted into and securely fitted into the outer peripheral wall hole 83. Sealing structures can also be provided between the inlet end 821 and the oil inlet portion of the oil guide pipe 82, and between the outlet end 822 and the oil outlet portion of the oil guide pipe 82, to prevent lubricating oil leakage. The oil guide pipe 82 is disposed within the internal space of the scroll compressor, that is, within the casing (not shown) of the scroll compressor.

[0046] Compared to the oil guide structure of the scroll compressor according to the second embodiment, in the oil guide structure of the scroll compressor of the second variant according to the second embodiment, since the oil inlet portion of the oil guide structure is constructed to communicate with the recess at the lower part of the recess, even when there is less lubricating oil in the recess, the lubricating oil can still enter the working chamber of the scroll compressor through the oil guide structure for lubrication.

[0047] Figure 7This is a partial cross-sectional view of a scroll compressor according to a third variation of the second embodiment of the present invention. The main bearing housing of the scroll compressor includes an oil return channel (not shown), which can be disposed in the thrust plate of the main bearing housing and communicate with the recess and the outside of the main bearing housing respectively, so that the lubricating oil in the recess can flow to the outside of the main bearing housing through the oil return channel. The scroll compressor includes a main bearing housing oil return pipe 34, which can be connected to the oil return channel, for example, inserted into the oil return channel and firmly fitted in the oil return channel, so that the lubricating oil can flow back from the recess through the main bearing housing oil return pipe 34 to the bottom oil sump of the scroll compressor. As shown, the oil guiding structure of the scroll compressor includes an oil inlet portion communicating with the recess of the main bearing housing, an oil outlet portion communicating with the working chamber of the scroll compressor, and an oil guide pipe 92 located between the oil inlet portion and the oil outlet portion and communicating with them. The oil inlet portion is constituted by the main bearing housing oil return pipe 34, while the oil outlet portion is constructed as an outer peripheral wall hole 93 formed in the outer peripheral wall of the fixed scroll component. The oil guide pipe 92 includes an inlet end 921 and an outlet end 922. The inlet end 921 of the oil guide pipe 92 can be connected to and inserted into the main bearing housing oil return pipe 34 to form a firm fit with the main bearing housing oil return pipe 34, so that a portion of the lubricating oil in the main bearing housing oil return pipe 34 can flow into the oil guide pipe 92. The outlet end 922 of the oil guide pipe 92 can be inserted into and firmly fitted into the outer peripheral wall hole 93. A sealing structure can also be provided between the inlet end 921 and the oil inlet portion of the oil guide pipe 92, and between the outlet end 922 and the oil outlet portion of the oil guide pipe 92, to prevent lubricating oil leakage. The oil guide pipe 92 is disposed in the internal space of the scroll compressor, that is, within the casing (not shown) of the scroll compressor.

[0048] Compared with the oil guiding structure of the scroll compressor according to the second embodiment, the oil guiding structure of the scroll compressor in the third variant according to the second embodiment is simpler in structure because it does not require an additional oil inlet section located in the main bearing housing, but directly uses the oil return pipe of the main bearing housing as the oil inlet section, thus further reducing the processing difficulty and manufacturing cost.

[0049] Furthermore, it should be noted that although the technical solutions of various embodiments of the scroll compressor according to the present invention have been described above, it is understood that the technical solutions in the above embodiments are only illustrative and not restrictive. Not all features are necessary, and various feasible modifications can be made, as specifically exemplified below.

[0050] In the first embodiment, although the oil outlet portion of the oil guide structure communicates with the suction chamber, the oil outlet portion may also communicate with other chambers in the working chamber of the scroll compressor, such as a chamber adjacent to the suction chamber. In the above embodiment, although the oil guide structure is shown as including an oil inlet portion, an oil guide pipe, and an oil outlet portion, the oil guide structure may include different numbers of oil inlet portions, oil guide pipes, and oil outlet portions. For example, the oil guide structure may include more than one oil inlet portion and oil guide pipe (the number of oil inlet portions and oil guide pipes are the same and correspond one-to-one, wherein the corresponding oil inlet portions and oil guide pipes are communicated with each other) and an oil outlet portion, and multiple oil guide pipes are all connected to the oil outlet portion; or the oil guide structure may include multiple oil guide substructures, each oil guide substructure including an oil inlet portion, an oil guide pipe, and an oil outlet portion. In a third variation of the second embodiment, although the oil guide pipe of the oil guide structure is connected to the lateral extension portion of the main bearing housing return oil pipe, the oil guide pipe may also be connected to other portions of the main bearing housing return oil pipe, such as the vertical extension portion. In various variations of the second embodiment, although the oil conduit is shown without a U-shaped oil reservoir, the oil conduit may also have a U-shaped oil reservoir.

[0051] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the present invention is not limited to the specific embodiments described and shown herein, and various changes can be made to the exemplary embodiments by those skilled in the art without departing from the scope defined by the claims.

Claims

1. A scroll compressor, the scroll compressor comprising: A compression mechanism, wherein the compression mechanism defines a series of working chambers within itself for drawing in, compressing and discharging working fluid; as well as A main bearing housing that supports the compression mechanism, the main bearing housing including a recess for receiving lubricating oil. The scroll compressor is characterized in that it further includes an oil guiding structure, which includes an oil inlet portion communicating with the recess, an oil outlet portion communicating with the working chamber, and an oil guide pipe communicating with the oil inlet portion and the oil outlet portion, so that lubricating oil can flow from the recess through the oil inlet portion, the oil guide pipe and the oil outlet portion into the working chamber, wherein the oil guide pipe is disposed in the internal space of the scroll compressor.

2. The scroll compressor according to claim 1, characterized in that, The oil guide pipe includes an inlet end and an outlet end, wherein the inlet end is connected to the oil inlet section and the outlet end is connected to the oil outlet section.

3. The scroll compressor according to claim 2, characterized in that, A sealing structure is provided between the oil inlet section and the inlet end of the oil guide pipe, and between the oil outlet section and the outlet end of the oil guide pipe.

4. The scroll compressor according to claim 2, characterized in that, The recess is formed in the main bearing housing body of the main bearing housing, and the oil inlet portion is configured as an oil drain channel formed in the main bearing housing body, wherein the oil drain channel is configured to extend from the recess to the outside of the main bearing housing, so that the lubricating oil in the recess can be discharged from the main bearing housing through the oil drain channel.

5. The scroll compressor according to claim 4, characterized in that: The oil drain channel is formed in a side portion of the main bearing housing body and extends laterally in the side portion; or The oil drain channel is formed in the bottom portion of the main bearing housing body and extends vertically in the bottom portion.

6. The scroll compressor according to any one of claims 2 to 5, characterized in that, The scroll compressor includes a moving scroll component, which includes a moving scroll end plate. The oil outlet portion is configured as a hole structure formed in the moving scroll end plate. The hole structure includes horizontal holes and vertical holes that communicate with each other. The horizontal holes extend radially inward from the outer side of the moving scroll end plate, and the vertical holes communicate with the working chamber, so that the lubricating oil discharged from the outlet end of the oil guide pipe can enter the working chamber through the hole structure.

7. The scroll compressor according to claim 6, characterized in that, The oil guide tube is a flexible hose.

8. The scroll compressor according to any one of claims 2 to 5, characterized in that, The scroll compressor includes a fixed scroll component, which includes a fixed scroll end plate and an outer peripheral wall extending vertically from the fixed scroll end plate. The oil outlet portion is configured as an outer peripheral wall hole formed in the outer peripheral wall. The outer peripheral wall hole is configured to penetrate the outer peripheral wall and communicate with the working chamber, so that the lubricating oil discharged from the outlet end of the oil guide pipe can enter the working chamber through the outer peripheral wall hole.

9. The scroll compressor according to claim 8, characterized in that, The oil guide tube can be a rigid tube or a flexible tube.

10. The scroll compressor according to any one of claims 1 to 5, 7 and 9, characterized in that, The oil conduit includes a U-shaped oil storage section.

11. The scroll compressor according to claim 10, characterized in that, The U-shaped oil storage section is lower than the oil inlet section in the vertical direction.

12. The scroll compressor according to any one of claims 1 to 5, 7 and 9, characterized in that, The working chamber connected to the oil outlet is the suction chamber among a series of working chambers.

13. The scroll compressor according to any one of claims 1 to 3, characterized in that: The scroll compressor includes a main bearing housing oil return pipe, which is configured to allow lubricating oil to flow back from the recess through the main bearing housing oil return pipe to the bottom oil sump of the scroll compressor. The main bearing housing return oil pipe constitutes the oil inlet section, and the inlet end of the guide oil pipe is connected to the main bearing housing return oil pipe, so that a portion of the lubricating oil in the main bearing housing return oil pipe can flow into the guide oil pipe.

14. The scroll compressor according to any one of claims 1 to 5, 7 and 9, characterized in that, The scroll compressor includes a main bearing housing oil return pipe, the main bearing housing includes an oil return channel, and the main bearing housing oil return pipe is connected to the oil return channel, so that lubricating oil can flow back from the recess to the bottom oil sump of the scroll compressor. The port of the oil return channel that communicates with the recess is vertically higher than the port of the oil inlet portion that communicates with the recess.

15. The scroll compressor according to any one of claims 1 to 5, 7 and 9, characterized in that, The oil guiding structure is configured such that the oil inlet pressure at the oil inlet portion of the oil guiding structure is greater than the oil outlet pressure at the oil outlet portion, and the difference between the oil inlet pressure and the oil outlet pressure is sufficient to overcome the gravity of the lubricating oil so that the lubricating oil can flow from the recess into the working chamber.

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