Scroll compressor and heat exchange equipment

Abstract

The application provides a scroll compressor and heat exchange equipment. The scroll compressor comprises a shell, a support assembly arranged in the shell, and a dynamic scroll and a static scroll matched with each other and arranged in the shell. The dynamic scroll and the static scroll form a compression cavity therebetween, the dynamic scroll is movably arranged relative to the support assembly, and the dynamic scroll and the support assembly form an intermediate cavity therebetween. The dynamic scroll has a plurality of groups of oil suction holes in communication with different low-pressure cavities of the compression cavity, the intermediate cavity is in communication with the low-pressure cavities through the oil suction holes, and the compression cavity simultaneously sucks in lubricating oil through the plurality of oil suction holes when the scroll compressor operates. The application solves the problem of unbalanced force of the symmetric compression cavity of the dynamic scroll and the static scroll in the prior art.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically, to a scroll compressor and heat exchange equipment. Background Technology

[0002] In scroll compressors, lubricating oil plays a role in lubrication and sealing. When the lubricating oil content in the refrigerant is high, it affects the volumetric efficiency of the compressor, the heat exchange of the refrigeration system, and the power consumption. Therefore, it is desirable for the oil content of the circulating refrigerant to be as low as possible. However, an excessively low oil content can lead to serious leakage between the moving and stationary plates during compressor operation, especially for variable frequency compressors operating at low frequencies.

[0003] In a typical automotive horizontal scroll compressor, the housing low-pressure chamber is located on one side of the moving and stationary discs, while the front cover high-pressure chamber is located on the other side. Lubricating oil separated from the front cover high-pressure chamber returns to the housing low-pressure chamber via an oil passage. The lower side of the housing low-pressure chamber is an oil reservoir. Because the support frame typically has airflow holes within its circumference, the moving and stationary disc low-pressure chambers, formed by the outer perimeter of the moving disc and the inner wall of the stationary disc, are connected to the housing low-pressure chamber, thus filling the lower side of the moving and stationary disc low-pressure chambers with lubricating oil.

[0004] To solve the problem of leakage between the moving and stationary discs, the level of the lubricating oil in the low-pressure chamber should typically be within the range of the air intake port on the lower side of the moving and stationary discs. This allows some of the lubricating oil to be carried into the pump body composed of the moving and stationary discs during operation, thus providing lubrication and sealing and reducing pump leakage.

[0005] The problems with lubricating the pump body by controlling the oil level are as follows:

[0006] 1. Only the lower suction port can carry lubricating oil. The refrigerant in suction chamber a formed by the lower suction port has a high oil content, while the refrigerant in suction chamber a' formed by the upper suction port has a low oil content. Similarly, the refrigerant in the middle chamber b has a higher oil content than the middle chamber b' on the other side. The different refrigerant states in the symmetrical chambers result in different forces, affecting the stable operation of the moving and stationary plates.

[0007] 2. The lubricating oil level is difficult to control precisely within the suction port range, and the lubricating oil level in the low-pressure chamber of the compressor casing is not a flat plane during operation. In particular, the lubricating oil level will change when operating under varying conditions, which will lead to changes in the amount of lubricating oil sucked into the pump body, resulting in problems such as pump body leakage or high oil content.

[0008] 3. The lubricating oil in the low-pressure chamber of the moving and stationary plates affects the amount of refrigerant drawn in at the suction port on the lower side of the moving and stationary plates, thus affecting the volumetric efficiency. Summary of the Invention

[0009] The main objective of this invention is to provide a scroll compressor and heat exchange equipment to solve the problem of uneven force distribution in the symmetrical compression chambers of the compressor's moving and stationary discs in the prior art.

[0010] To achieve the above objectives, according to one aspect of the present invention, a scroll compressor is provided, comprising: a housing; a support assembly disposed within the housing; a movable scroll and a stationary scroll that cooperate with each other, both disposed within the housing, a compression chamber forming between the movable scroll and the stationary scroll, the movable scroll being movably disposed relative to the support assembly, and an intermediate cavity forming between the movable scroll and the support assembly; wherein the movable scroll has multiple sets of oil suction holes communicating with different low-pressure chambers of the compression chamber, the intermediate cavity communicating with the low-pressure chambers through the oil suction holes, and when the scroll compressor operates, the compression chamber simultaneously draws in lubricating oil through the multiple oil suction holes.

[0011] Furthermore, oil suction holes are symmetrically arranged on both sides of the moving scroll.

[0012] Furthermore, the number of oil suction holes in each group is greater than or equal to one.

[0013] Furthermore, the support assembly has a connecting channel, or a connecting channel is formed between the support assembly and the stationary vortex disk, the stationary vortex disk has an oil return channel, the connecting channel extends circumferentially along the support assembly or the stationary vortex disk, and the oil return channel is connected to the oil suction hole and the intermediate cavity through the connecting channel.

[0014] Furthermore, the connecting channel is formed on the support assembly or on the stationary vortex disk.

[0015] Furthermore, the multiple sets of oil suction holes include a first oil suction hole and a second oil suction hole, the first oil suction hole being located below the second oil suction hole, the second oil suction hole being connected to the connecting channel; and / or the end of the connecting channel being connected to the intermediate cavity.

[0016] Furthermore, the connecting channel includes a first connecting section, an oil storage section, and a second connecting section connected in sequence. The first connecting section is connected to the oil return channel, and the second connecting section is connected to the intermediate cavity. The oil storage section is provided with an oil outlet that is connected to the oil suction hole.

[0017] Furthermore, the connection point between the second connecting section and the oil storage section is higher than the oil outlet.

[0018] Furthermore, the flow area of ​​the second connected segment is larger than that of the first connected segment.

[0019] Furthermore, the connecting channel has an oil outlet, the moving vortex has a moving vortex oil storage cavity, at least one oil suction hole is located in the moving vortex oil storage cavity, and the oil outlet is connected to the oil suction hole through the moving vortex oil storage cavity.

[0020] Furthermore, the oil inlet of the moving vortex oil storage chamber is located directly below the oil outlet; and / or the oil suction port is located in the bottom region of the moving vortex oil storage chamber.

[0021] Furthermore, the diameter of the oil outlet hole is less than or equal to the diameter of the oil suction hole located in the oil outlet chamber of the moving vortex.

[0022] Furthermore, the outer edge of the moving scroll has a flange, at least a portion of which is recessed toward the center of the moving scroll and together with the support assembly forms the oil storage cavity of the moving scroll.

[0023] Furthermore, the support assembly includes: a support body having a connecting groove; a wear-resistant plate disposed between the support body and the stationary vortex disk, the wear-resistant plate and the connecting groove forming a connecting channel, the wear-resistant plate having an oil inlet hole and an oil outlet hole, the oil return channel communicating with the connecting channel through the oil inlet hole, and the oil outlet hole communicating with the oil suction hole.

[0024] Furthermore, the end face of the moving scroll facing the stationary scroll has a spiral moving scroll profile, and all oil suction holes include a first oil suction hole and a second oil suction hole symmetrically arranged along the axial direction of the moving scroll. The first oil suction hole is located at the end of the moving scroll profile away from the center of the moving scroll.

[0025] Furthermore, the first oil suction hole is located at the end of the moving scroll profile, facing the center of the moving scroll, and the second oil suction hole is located on the outside of the moving scroll profile.

[0026] Furthermore, the oil outlet is located at the center of the oil suction port's running trajectory. The scroll compressor also includes a bent central section. The oil outlet is connected to the oil suction port through the central section, and the central section passes through the oil outlet and can rotate around the axis of the oil outlet.

[0027] Furthermore, the end face of the stationary volute facing the moving volute has a spiral stationary volute profile. The stationary volute profile is located within the movement range of the oil suction hole. As the moving volute moves, the stationary volute profile switches between aligned blocking and offset states with the oil suction hole, so that the oil suction hole is intermittently connected to the low-pressure chamber.

[0028] Furthermore, the moving scroll has a slotted structure for mounting the ring structure or adjusting the counterweight, and the oil suction hole is located at the edge of the slotted structure and communicates with the slotted structure.

[0029] Furthermore, the support assembly has an oil return groove, the stationary volute has an oil return channel, the oil return channel is connected to the intermediate cavity through the oil return groove, the moving volute has an oil suction groove, the top of the oil suction groove is connected to the oil suction hole, the oil suction groove extends downward along the circumference of the moving volute and is connected to the intermediate cavity.

[0030] Furthermore, the housing has an air intake chamber and an oil storage chamber, and the support assembly has a gas channel. The air intake chamber is connected to the compression chamber through the gas channel, and the height of the gas channel is higher than the maximum preset height of the oil level in the oil storage chamber.

[0031] According to another aspect of the present invention, a heat exchange device is provided, comprising the scroll compressor described above.

[0032] By applying the technical solution of this invention, multiple sets of oil suction holes are provided, with each set of holes cooperating with different low-pressure chambers within the compression chamber. This allows the oil suction holes in different sets to simultaneously perform oil suction actions when the moving scroll performs its rotary translational motion, thereby drawing lubricating oil into different low-pressure chambers and providing lubrication to multiple locations between the moving and stationary scrolls. Because the suction chambers on both sides of the moving and stationary scrolls simultaneously draw in refrigerant and lubricating oil, the refrigerant content in the suction chambers on both sides is essentially the same. This results in a similar oil content in the refrigerant within the compression chambers of the moving and stationary scrolls, leading to balanced force distribution in the compression chambers and smooth operation of the moving scroll. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0034] Figure 1 A side sectional view of a scroll compressor according to Embodiment 1 of the present invention is shown;

[0035] Figure 2 It shows Figure 1 Enlarged view of point P in the middle;

[0036] Figure 3 It shows Figure 1 A schematic diagram of the structure of the support body in the diagram;

[0037] Figure 4 It shows Figure 1 A schematic diagram of the structure of the wear-resistant sheet in the middle;

[0038] Figure 5 It shows Figure 1 A schematic diagram of the front structure of the moving scroll plate in the image;

[0039] Figure 6 It shows Figure 1 A schematic diagram of the structure on the back of the moving scroll plate;

[0040] Figure 7 It shows Figure 1 A schematic diagram of the connecting channel between the support assembly and the moving scroll plate;

[0041] Figure 8 It shows Figure 1 A schematic diagram of the structure in which the moving scroll plate and the stationary scroll plate cooperate;

[0042] Figure 9 It shows Figure 1 A schematic diagram of the structure of the moving scroll and stationary scroll in the fully open oil suction port state;

[0043] Figure 10It shows Figure 1 A schematic diagram of the structure of the moving scroll and stationary scroll in the oil suction hole half-open state;

[0044] Figure 11 It shows Figure 1 A schematic diagram of the structure of the moving scroll and stationary scroll in the closed state of the oil suction hole;

[0045] Figure 12 It shows Figure 1 A schematic diagram of the structure of the moving scroll and stationary scroll in the oil suction hole half-open state;

[0046] Figure 13 A schematic diagram of the structure of the moving scroll and the support assembly in Embodiment 2 of the present invention is shown;

[0047] Figure 14 It shows Figure 13 A schematic diagram of the connecting channel between the moving scroll plate and the support assembly;

[0048] Figure 15 It shows Figure 13 A cross-sectional view of the central section;

[0049] Figure 16 A schematic diagram of the back side of the moving scroll plate according to Embodiment 3 of the present invention is shown;

[0050] Figure 17 It shows Figure 16 A schematic diagram of the wear-resistant sheet in the image.

[0051] The above figures include the following reference numerals:

[0052] 10. Shell; 11. Oil reservoir; 20. Support assembly; 21. Connecting channel; 211. First connecting section; 212. Oil reservoir section; 213. Second connecting section; 214. Oil outlet; 22. Support body; 23. Wear-resistant plate; 231. Oil inlet; 24. Oil return groove; 25. Gas channel; 30. Moving scroll; 31. Oil suction hole; 311. First oil suction hole; 312. Second oil suction hole; 32. Moving scroll oil reservoir; 33. Flange; 34. Moving scroll profile; 35. Hole and groove structure; 36. Oil suction groove; 40. Stationary scroll; 41. Oil return channel; 42. Stationary scroll profile; 50. Intermediate cavity; 61. Low-pressure cavity; 62. Middle compression cavity; 63. High-pressure cavity; 70. Central through section. Detailed Implementation

[0053] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0055] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0056] To address the problem of uneven force distribution in the symmetrical compression chambers of compressors with symmetrical moving and stationary discs in existing technologies, this invention provides a scroll compressor and a heat exchange device. The heat exchange device includes the scroll compressor described below.

[0057] Example 1

[0058] like Figures 1 to 12 The scroll compressor shown includes a housing 10, a support assembly 20, and a moving scroll 30 and a stationary scroll 40 that cooperate with each other. The support assembly 20 is disposed inside the housing 10. The moving scroll 30 and the stationary scroll 40 are both disposed inside the housing 10, and a compression chamber is formed between the moving scroll 30 and the stationary scroll 40. The moving scroll 30 is movably disposed relative to the support assembly 20, and an intermediate cavity 50 is formed between the moving scroll 30 and the support assembly 20. The moving scroll 30 has multiple sets of oil suction holes 31 that communicate with different low-pressure chambers 61 of the compression chamber. The intermediate cavity 50 communicates with the low-pressure chambers 61 through the oil suction holes 31. When the scroll compressor is in operation, the compression chamber simultaneously draws in lubricating oil through the multiple oil suction holes 31.

[0059] This embodiment features multiple sets of oil suction holes 31, with each set corresponding to a different low-pressure chamber 61 within the compression chamber. This allows the moving scroll 30 to simultaneously draw oil during its rotational and translational motion, drawing lubricating oil into different low-pressure chambers 61 to lubricate multiple locations between the moving scroll 30 and the stationary scroll 40. Because the suction chambers on both sides of the moving and stationary scrolls simultaneously draw in refrigerant and lubricating oil, the refrigerant content in both suction chambers is essentially the same. This results in a similar oil content in the refrigerant within the compression chambers of both scrolls, ensuring balanced force distribution and smooth operation of the moving scroll 30.

[0060] This embodiment uses a horizontal scroll compressor as an example for illustration; however, other types of scroll compressors can also be used. Figure 1 and Figure 2As shown, when the scroll compressor is running, the low-temperature, low-pressure refrigerant enters the low-pressure chamber 61 of the moving and stationary scrolls from the suction chamber of the housing 10. At this time, the refrigerant and the lubricating oil drawn in by the moving and stationary scrolls are drawn in through the suction chambers of the moving and stationary scrolls, compressed through the middle compression chamber 62 in the middle of the moving and stationary scrolls and the high-pressure chamber 63 of the moving and stationary scrolls, and discharged from the stationary scroll 40 to the high-pressure chamber composed of the front cover and the stationary scroll 40. At this time, the refrigerant is in a high-temperature and high-pressure state. The high-temperature and high-pressure refrigerant containing lubricating oil is separated by the oil separator of the front cover and discharged from the compressor. The separated lubricating oil flows back to the intermediate chamber 50 composed of the moving scroll 30, the wear-resistant plate 23, and the support body 22 through the oil return channel 41 of the stationary scroll 40 and the connecting channel 21 of the support assembly 20. The lubricating oil in the intermediate chamber 50 splashes to lubricate the bearings on both sides of the eccentric sleeve under the drive of the eccentric sleeve. The excess lubricating oil flows back to the oil storage chamber 11 of the housing 10 through the central hole of the support baffle. The aforementioned intake chamber, middle compression chamber 62, and high-pressure chamber 63 together form the compression chamber.

[0061] It should be noted that the moving scroll 30 of the scroll compressor in this embodiment undergoes rotary translational motion, meaning that the moving scroll 30 moves in a plane along the surface where its end face is located, and the trajectory of the motion is circular. A helical stationary scroll profile 42 is provided on the stationary scroll 40, and a moving scroll profile 34 is provided on the moving scroll 30. The stationary scroll profile 42 and the moving scroll profile 34 can be symmetrically arranged and coiled together. When the moving scroll 30 rotates in the plane, the size of the compression chamber formed between the stationary scroll profile 42 and the moving scroll profile 34 can be changed, thereby achieving a compression effect. Regarding the compression chamber, the aforementioned low-pressure chamber 61 is also the intake chamber.

[0062] Preferably, such as Figure 5 As shown, in this embodiment, oil suction holes 31 are symmetrically arranged on both sides of the moving scroll 30. This ensures that the oil content of the refrigerant in the symmetrical compression chambers is basically the same, and the forces on the symmetrical compression chambers are balanced. Because the forces on the symmetrical compression chambers are balanced, the moving scroll 30 is guaranteed to operate smoothly.

[0063] Optionally, the specific number of oil suction holes 31 in each group of oil suction holes 31 can be set as needed, and one or more can be set. This embodiment takes the setting of two groups of oil suction holes 31 as an example, and each group of oil suction holes 31 includes only one oil suction hole 31. That is to say, there are two oil suction holes 31 in this embodiment, namely the first oil suction hole 311 and the second oil suction hole 312. The line connecting the first oil suction hole 311 and the second oil suction hole 312 passes through the center of the moving scroll 30, and the line connecting the two is not horizontal or vertical, but inclined. Of course, the specific number and arrangement of oil suction holes 31 can be adjusted as needed, and are not limited to the setting method described in this embodiment.

[0064] In this embodiment, the first oil suction hole 311 is located below the second oil suction hole 312. That is, the height of the first oil suction hole 311 is lower, while the height of the second oil suction hole 312 is higher. Since the moving scroll 30 in this embodiment is a planar circular motion, the positional relationship between the first oil suction hole 311 and the second oil suction hole 312 is fixed, and the first oil suction hole 311 is located below the second oil suction hole 312, which will not change.

[0065] For the first oil suction port 311, because it is located at a lower height, it can directly communicate with the intermediate cavity 50, or in other words, the distance between the first oil suction port 311 and the intermediate cavity 50 is very short, and the first oil suction port 311 can directly draw lubricating oil from the intermediate cavity 50 and pump it into the compression chamber. However, for the second oil suction port 312, because it is located at a higher height, it may be difficult for it to directly draw lubricating oil from the intermediate cavity 50. Therefore, this embodiment optimizes the oil suction method and structure of the second oil suction port 312.

[0066] like Figures 3 to 7 As shown, in this embodiment, the support assembly 20 has a connecting channel 21, and the stationary vortex disk 40 has a return oil channel 41. The connecting channel 21 extends circumferentially along the support assembly 20 or the stationary vortex disk 40. The return oil channel 41 is connected to the second oil suction hole 312 and the intermediate cavity 50 through the connecting channel 21. Specifically, the bottom end of the connecting channel 21, that is, the beginning end along the lubricating oil flow direction, is located at the return oil channel 41, so that it can be connected to the return oil channel 41, allowing the lubricating oil flowing back from the return oil channel 41 to enter the connecting channel 21. At the same time, the top end of the connecting channel 21, that is, the end end along the lubricating oil flow direction, is connected to the intermediate cavity 50, so that the returning lubricating oil can flow back into the intermediate cavity 50 through the connecting channel 21. Meanwhile, the second oil suction hole 312 is also connected to the part between the two ends of the connecting channel 21, so that the lubricating oil flowing back through the connecting channel 21 can be sucked into the compression chamber through the second oil suction hole 312 to achieve lubrication of the compression chamber.

[0067] In an embodiment not shown, the connecting channel 21 is not formed on the support assembly 20 as described above, but is formed jointly by the support assembly 20 and the stationary vortex disk 40. Specifically, a long groove is formed on the stationary vortex disk 40, and the support assembly 20 covers the long opening of the groove, thereby shielding the groove and forming the connecting channel 21. In this case, the connecting channel 21 is formed on the stationary vortex disk 40, and the connecting channel 21 can still communicate with the return channel. The top of the connecting channel 21 can extend from the stationary vortex disk 40 to the support assembly 20, thereby passing through the support assembly 20 and communicating with the intermediate cavity 50 formed by the support assembly 20.

[0068] In this embodiment, the connecting channel 21 includes a first connecting section 211, an oil storage section 212, and a second connecting section 213 connected sequentially. The first connecting section 211 is connected to the oil return channel 41, and the second connecting section 213 is connected to the intermediate cavity 50. The oil storage section 212 is provided with an oil outlet 214 that is connected to the second oil suction hole 312. The flow areas of the first connecting section 211 and the second connecting section 213 are not large, as long as they can meet the flow requirements of the lubricating oil. However, the oil storage section 212 needs to play a role in oil storage, so it needs to have a certain volume. In this embodiment, the oil storage section 212 is set as a cavity, which occupies a certain space volume, so that the oil storage cavity 11 can play a role in oil storage. The oil storage section 212 is provided with an oil outlet 214, which is closely connected to the second oil suction hole 312. This allows the lubricating oil stored in the oil storage section 212 to be sucked into the compression chamber through the oil outlet 214 and the second oil suction hole 312 when the compression chamber needs to suck oil, thus achieving oil suction lubrication.

[0069] By setting up the oil storage section 212, the connecting channel 21 itself can have a certain oil storage capacity. In this way, the second oil suction hole 312 can directly suck up the stored lubricating oil from the connecting channel 21. Thus, it is not necessary to suck up lubricating oil from the intermediate cavity 50. Only when the lubricating oil stored in the oil storage section 212 is insufficient will the second oil suction hole 312 suck up oil from the intermediate cavity 50 through the second connecting section 213 or suck up oil from the return oil channel 41 through the first connecting section 211.

[0070] In this embodiment, to ensure the oil storage function of the oil storage section 212, the connection position between the second connecting section 213 and the oil storage section 212 is set to be higher than the oil outlet 214. That is, the oil outlet 214 is located at the bottom of the oil storage section 212, while the connection position between the second connecting section 213 and the oil storage section 212 is located at the top of the oil storage section 212. In this way, the lubricating oil entering the oil storage section 212 from the first connecting section 211 will first accumulate in the oil storage section 212. At this time, the second suction hole 312 can already draw lubricating oil from the oil storage section 212. As the lubricating oil continues to flow back, when the lubricating oil level in the oil storage section 212 is higher than the connection position between the second connecting section 213 and the oil storage section 212, subsequent lubricating oil can enter the second connecting section 213, so that the second connecting section 213 enters the intermediate cavity 50, realizing the return of lubricating oil. Meanwhile, the oil outlet 214 is located at the bottom of the oil storage section 212, which can also ensure that the lubricating oil stored in the oil storage section 212 is fully utilized and avoids residue and waste.

[0071] Preferably, the flow area of ​​the second connecting section 213 is larger than that of the first connecting section 211. This ensures that excess lubricating oil in the oil storage cavity 11 can flow back to the intermediate cavity 50 as soon as possible, avoiding situations such as pressure on the oil storage cavity 11 due to restricted flow.

[0072] In this embodiment, in addition to the oil storage section 212 described above, a structure is also provided on the moving vortex disk 30 to cooperate with it. Specifically, as shown in the figure... Figure 6 As shown, a moving scroll oil storage chamber 32 is provided on the moving scroll 30, and the second oil suction hole 312 is located inside the moving scroll oil storage chamber 32. The oil outlet hole 214 is connected to the moving scroll oil storage chamber 32, and the two are directly connected, so that the oil outlet hole 214 is connected to the second oil suction hole 312 through the moving scroll oil storage chamber 32. In this way, the moving scroll oil storage chamber 32 has two functions. On the one hand, it has a receiving function. The moving scroll oil storage chamber 32 is relatively large, so even if the moving scroll 30 undergoes planar circular motion, it can still maintain the connection between the oil outlet hole 214 and the moving scroll oil storage chamber 32, thereby ensuring that the lubricating oil in the oil storage section 212 can always enter the compression chamber through the oil outlet hole 214, the moving scroll oil storage chamber 32, and the second oil suction hole 312. Secondly, it serves a storage function. Since the oil storage chamber 32 of the moving scroll also has a certain space, it can also play a certain role in oil storage. Together with the oil storage section 212, it can increase the oil storage capacity, thereby ensuring the oil supply to the second oil suction hole 312. Through the above-mentioned oil storage effect, the oil circuit forms a circulation path of oil return-oil storage-dynamic oil suction. By controlling the movement of the moving scroll 30 to intermittently connect the suction chamber to the oil storage chamber 11, the oil supply to the suction chamber is realized, improving the effective utilization of lubricating oil.

[0073] In this embodiment, the oil storage chamber 32 of the moving scroll plate adopts an upper opening configuration, that is, the upper opening of the oil storage chamber 32 of the moving scroll plate forms an oil inlet, and the oil inlet is located directly below the oil outlet. This positional relationship is always maintained and does not change with the movement of the moving scroll plate 30. In this way, the lubricating oil in the oil storage section 212 can always enter the oil storage chamber 32 of the moving scroll plate through the oil outlet 214 and the oil inlet, and there will be no leakage or failure to supply oil.

[0074] In this embodiment, the oil storage cavity 32 of the moving scroll plate is not formed by an additional structural form, but by a flange 33 at the outer edge of the moving scroll plate 30. Specifically, the outer edge of the moving scroll plate 30 has a flange 33, which abuts against the support assembly 20 to form part of the intermediate cavity 50. At least a portion of the flange 33 is recessed toward the center of the moving scroll 30, thus naturally forming a recess. This recess, combined with the contact between the moving scroll 30 and the end face of the support assembly 20, forms a moving scroll oil storage cavity 32 between the back of the moving scroll 30, the recessed flange 33, and the end face of the support assembly 20. Since the second oil suction hole 312 is located in the upper region of the moving scroll 30, the recessed flange 33 is also located in the upper region of the moving scroll 30. Thus, when the flange 33 is recessed toward the center of the moving scroll 30, it naturally forms an upper opening, which is the oil inlet. In this way, the moving scroll 30 and the support assembly 20 together form the aforementioned moving scroll oil storage cavity 32.

[0075] In an embodiment not shown, in addition to using the flange 33 to form the moving vortex oil storage cavity 32, a separate structure such as ribs can also be provided to form the moving vortex oil storage cavity 32.

[0076] Preferably, similar to the setting of the oil outlet, the second oil suction hole 312 in this embodiment is located in the bottom area of ​​the oil storage cavity 32 of the moving vortex disk, so as to ensure that the lubricating oil is fully utilized and avoids residual waste.

[0077] Preferably, the diameter of the oil outlet 214 is less than or equal to the diameter of the second oil suction hole 312 located in the oil outlet chamber of the moving scroll 30. This ensures that as long as there is lubricating oil in the oil storage section 212, the oil supply speed of the oil outlet 214 will not be lower than the oil suction speed of the second oil suction hole 312, thereby ensuring continuous lubrication.

[0078] It should be noted that the specific structure of the oil storage section 212 and the moving vortex oil storage chamber 32, as well as whether or not they are set, can be adjusted as needed. For example, the oil storage section 212 can be omitted, and only the moving vortex oil storage chamber 32 can be set, or the moving vortex oil storage chamber 32 can be omitted, and only the oil storage section 212 can be set, etc.

[0079] In this embodiment, the support assembly 20 includes a support body 22 and a wear-resistant plate 23. The end face of the support body 22 has a connecting groove. The wear-resistant plate 23 is disposed between the support body 22 and the stationary volute 40, and the wear-resistant plate 23 covers the connecting groove. Thus, the wear-resistant plate 23 and the connecting groove together form a connecting channel 21. To avoid obstructing the connecting channel 21 and other structures, the wear-resistant plate 23 in this embodiment also has an oil inlet hole 231. The oil inlet hole 231 is located at the bottom of the wear-resistant plate 23, between the oil return channel 41 and the connecting channel 21, allowing the oil return channel 41 to connect with the connecting channel 21 through the oil inlet hole 231. The size of the inlet hole 231 is slightly larger than the size of the oil return channel 41 and the connecting channel 21. Since the wear-resistant plate 23 blocks the connecting channel 21 formed by the support body 22, and part of the wear-resistant plate 23 is between the support body 22 and the moving scroll 30, the oil outlet 214 on the bottom side of the oil storage section 212 is also set on the wear-resistant plate 23. In this way, the oil outlet 214 serves to connect the oil storage section 212 with the oil storage chamber 32 of the moving scroll, so that the oil outlet 214 can be connected to the second oil suction hole 312 through the oil storage chamber 32 of the moving scroll.

[0080] It should be noted that the various optimizations to the oil suction method and structure of the second oil suction hole 312 described above can not only be applied to the second oil suction hole 312, but also to the first oil suction hole 311. That is, the second oil suction hole 312 can be replaced with the first oil suction hole 311. Correspondingly, the position and height of the oil outlet hole 214, flange 33, oil storage cavity 11 and other structures and components can be adjusted as needed to match the position and height of the first oil suction hole 311. Since the first oil suction hole 311 is connected to the intermediate cavity 50 through the connecting channel 21, the direct connection between the first oil suction hole 311 and the intermediate cavity 50 can be cut off.

[0081] like Figure 5 and Figure 8 As shown, in this embodiment, the first oil suction hole 311 is located at the end of the moving scroll profile 34 away from the center of the moving scroll 30, and the first oil suction hole 311 is located on the inner side of the end of the moving scroll profile 34 facing the center of the moving scroll 30, while the second oil suction hole 312 is located on the outer side of the moving scroll profile 34. This optimizes the positions of the first oil suction hole 311 and the second oil suction hole 312 to ensure they can cooperate with the stationary scroll profile 42.

[0082] Specifically, the stationary vortex profile 42 is located within the movement range of the first oil suction hole 311 and the second oil suction hole 312. Thus, with the planar circular motion of the moving vortex 30, the obstruction and avoidance relationship between the stationary vortex profile 42 and the first and second oil suction holes 311 changes, allowing the stationary vortex profile 42 and the oil suction holes 31 to switch between aligned obstruction and avoidance / misalignment. When aligned obstruction occurs, the oil suction hole 31 is disconnected from the low-pressure chamber 61; when avoidance / misalignment occurs, the oil suction hole 31 is connected to the low-pressure chamber 61, thereby creating an intermittently connected connection between the oil suction hole 31 and the low-pressure chamber 61. Figures 9 to 12 As shown, along the rotation direction of the moving scroll 30, the diagram illustrates the fit between the moving scroll profile 34 of the moving scroll 30 and the stationary scroll profile 42 of the stationary scroll 40 when the oil suction holes 31 of the moving scroll 30 are in the fully open state, the partially open state, the closed state, and the partially open state. Figures 9 to 12 The figures on the left in the middle, and a schematic diagram of the cooperation between the moving scroll 30 and the support assembly 20. Figures 9 to 12 (See the right side of each figure in the figure). In this way, when the intake ends, the oil suction hole 31 is covered by the static volute profile 42 to ensure that the oil suction hole 31 is not connected to the intermediate compression chamber, and the closed intake chamber is not connected to the low-pressure chamber 61 outside the moving volute 30, so as to prevent leakage to the low-pressure chamber 61 when the closed intake chamber compresses gas.

[0083] In this embodiment, the housing 10 has an intake chamber and an oil storage chamber 11, and the support assembly 20 has a gas channel 25. The intake chamber is connected to the compression chamber through the gas channel 25, thereby enabling the compression chamber to draw in air. The height of the gas channel 25 is higher than the preset limit height of the oil level in the oil storage chamber 11. This prevents the lubricating oil in the oil storage chamber 11 of the housing 10 from flowing directly into the low-pressure chamber 61. Therefore, the lubricating oil will not affect the amount of refrigerant drawn in through the intake port on the lower side of the rotating and stationary scroll plates, thereby improving volumetric efficiency.

[0084] Optionally, the moving scroll 30 has a slotted structure 35 for mounting a ring structure or adjusting a counterweight. To ensure smooth oil suction from the first oil suction hole 311 and to fully utilize the space of the counterweight groove or steel ring hole near the end of the moving scroll profile 34 on the lower side of the moving scroll, this embodiment sets the first oil suction hole 311 at the edge of the slotted structure 35 and connects it to the slotted structure 35. This embodiment uses the slotted structure 35 as a counterweight groove, thus providing a larger space for the oil storage chamber 11, ensuring smooth oil suction from the first oil suction hole 311. Of course, the second oil suction hole 312 can also adopt the same setting method as the first oil suction hole 311, depending on the actual situation.

[0085] Example 2

[0086] The difference from Embodiment 1 is that the way the oil outlet 214 and the second oil suction hole 312 are matched is different.

[0087] like Figure 13 and Figure 14 As shown, in this embodiment, since the moving scroll 30 performs planar circular motion, any point on the moving scroll 30 performs circular motion with a radius of eccentricity R relative to the support assembly 20. The oil outlet 214 of the wear-resistant plate 23 is set at the rotation center of the running trajectory of the second oil suction hole 312. In this way, the positional relationship between the oil outlet 214 and the second oil suction hole 312 is determined, that is, the second oil suction hole 312 is always located on a circle with the oil outlet 214 as the center and a radius of R.

[0088] Based on the above, such as Figure 15 As shown, the scroll compressor in this embodiment also includes a bent central section 70. The oil outlet 214 is connected to the oil suction port 31 through the central section 70, and the central section 70 passes through the oil outlet 214 and can rotate around the axis of the oil outlet 214. The bending degree of the central section 70 is the same as the eccentricity R. In this way, the central section 70 serves to connect the oil outlet 214 and the second oil suction port 312. Since the central section 70 can rotate around the axis of the oil outlet 214, the end of the central section 70 that is connected to the second oil suction port 312 is always located on the movement trajectory of the second oil suction port 312, thereby ensuring that the oil outlet 214 and the second oil suction port 312 always maintain a connected relationship through the central section 70.

[0089] Specifically, in this embodiment, the central section 70 is bent into a stepped shape, which includes a first section, a second section, and a third section connected in sequence. Adjacent sections form a 90-degree angle, and the first and third sections are located on both sides of the second section. The length of the second section is equal to the eccentricity R. A countersunk hole can be provided at the oil outlet 214. The first section extends into the oil outlet 214, and the third section extends into the second oil suction hole 312. This allows the central section 70 to rotate around the first section. The third section and the second oil suction hole 312 are always located on a circle with the oil outlet 214 as the center and a radius of R. This enables the movement of the vortex 30, and the oil outlet 214 maintains communication with the second oil suction hole 312 through the central section 70.

[0090] Of course, the specific structural form of the middle section 70 is not limited to the above-described setting in this embodiment. It can also be set as an L-section. In this case, the end of the middle section 70 only needs to be connected to the oil outlet 214 or the second oil suction hole 312, and does not need to be inserted.

[0091] Example 3

[0092] The difference from Embodiment 1 is that the oil suction method of the second oil suction hole 312 is different.

[0093] like Figure 16 As shown, in this embodiment, the connecting channel 21 and related structures of Embodiment 1 are not used. This embodiment uses the second oil suction hole 312 to directly draw oil from the intermediate cavity 50. Specifically, since there is a certain height difference between the second oil suction hole 312 and the intermediate cavity 50, and the second oil suction hole 312 is higher, in order to ensure that the second oil suction hole 312 can draw lubricating oil from the intermediate cavity 50, this embodiment sets the second oil suction hole 312 on the flange 33 of the moving scroll 30. The moving scroll 30 has an oil suction groove 36. The top of the oil suction groove 36 is connected to the second oil suction hole 312. The oil suction groove 36 extends downward along the circumference of the moving scroll 30, and the bottom is connected to the intermediate cavity 50. In this way, the second oil suction hole 312 is connected to the part of the intermediate cavity 50 where lubricating oil is stored through the oil suction groove 36, so that the second oil suction hole 312 can draw oil from the intermediate cavity 50 through the oil suction groove 36. The oil suction groove 36 is also formed by the support body 22 and the wear-resistant plate 23, ensuring that it forms a channel-like structure.

[0094] Preferably, a connecting port is formed between the intermediate cavity 50 and the oil storage cavity 11, the connecting port being located on the support and at the center of the support. The bottom of the oil suction groove 36 is lower than the lowest point of the connecting port, so that the oil suction groove 36 can always be immersed in the lubricating oil in the intermediate cavity 50, thereby ensuring that the second oil suction hole 312 can stably suck oil. Of course, the height of the first oil suction hole 311 can also be set to be lower than the lowest point of the connecting port, so that the first oil suction hole 311 can also stably suck oil.

[0095] like Figure 17 As shown, since this embodiment does not have a connecting channel 21, in order to achieve oil return, this embodiment has a separate oil return groove 24 on the support assembly 20. The stationary vortex disk 40 also has an oil return channel 41. The oil return channel 41 is connected to the intermediate cavity 50 through the oil return groove 24, thereby realizing a separate oil return path. Oil return and oil suction are carried out independently of each other.

[0096] It should be noted that "multiple" in the above embodiments refers to at least two.

[0097] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0098] 1. This technology solves the problem of uneven force distribution in the symmetrical compression chambers of the compressor's moving and stationary discs.

[0099] 2. The suction chambers on both sides of the moving and stationary scrolls simultaneously draw in refrigerant and lubricating oil, thus ensuring that the refrigerant content in the suction chambers on both sides is basically the same. This results in a similar oil content in the refrigerant in the compression chambers of the moving and stationary scrolls, leading to balanced force distribution in the compression chambers and smooth operation of the moving scroll.

[0100] 3. When the intake is finished, the oil suction hole is covered by the profile of the stationary volute to ensure that the oil suction hole is not connected to the intermediate compression chamber, and the closed intake chamber is not connected to the low-pressure chamber outside the moving volute, so as to prevent leakage to the low-pressure chamber when the closed intake chamber compresses gas.

[0101] 4. The oil circuit forms a circulating flow path of oil return-oil storage-dynamic oil suction. The oil suction chamber is intermittently connected to the intermediate oil storage chamber by the movement of the moving scroll to achieve oil supply to the air suction chamber, thereby improving the effective utilization of lubricating oil.

[0102] 5. The lubricating oil in the oil storage chamber of the casing cannot flow directly into the low-pressure chamber. Therefore, the lubricating oil will not affect the amount of refrigerant drawn in at the suction port on the lower side of the moving and stationary scrolls, thereby improving the volumetric efficiency.

[0103] 6. The counterweight groove has a large space to serve as an oil storage chamber, ensuring smooth oil suction from the first oil suction hole.

[0104] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0105] 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.

[0106] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0107] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A scroll compressor, characterized in that, include: Shell (10); A support assembly (20) is disposed within the housing (10); The moving scroll (30) and the stationary scroll (40) cooperate with each other. Both the moving scroll (30) and the stationary scroll (40) are disposed in the housing (10). A compression cavity is formed between the moving scroll (30) and the stationary scroll (40). The moving scroll (30) is movably disposed relative to the support assembly (20). An intermediate cavity (50) is formed between the moving scroll (30) and the support assembly (20). The moving scroll (30) has multiple sets of oil suction holes (31) that are connected to different low-pressure chambers (61) of the compression chamber. The intermediate chamber (50) is connected to the low-pressure chamber (61) through the oil suction holes (31). When the scroll compressor is in operation, the compression chamber simultaneously draws in lubricating oil through multiple oil suction holes (31). The support assembly (20) has a connecting channel (21), or the support assembly (20) and the stationary vortex disk (40) form a connecting channel (21). The stationary vortex disk (40) has an oil return channel (41). The connecting channel (21) extends circumferentially along the support assembly (20) or the stationary vortex disk (40). The oil return channel (41) is connected to the oil suction hole (31) and the intermediate cavity (50) through the connecting channel (21). The bottom end of the connecting channel (21) is located at the oil return channel (41) and is connected to the oil return channel (41). The top end of the connecting channel (21) is connected to the intermediate cavity (50). The connecting channel (21) includes a first connecting section (211), an oil storage section (212), and a second connecting section (213) connected in sequence. The first connecting section (211) is connected to the oil return channel (41), and the second connecting section (213) is connected to the intermediate cavity (50). The oil storage section (212) is provided with an oil outlet (214) that is connected to the oil suction hole (31). The connection position between the second connecting section (213) and the oil storage section (212) is higher than that of the oil outlet (214).

2. The scroll compressor according to claim 1, characterized in that, The oil suction holes (31) are symmetrically arranged on opposite sides of the moving scroll (30).

3. The scroll compressor according to claim 1, characterized in that, The number of oil suction holes (31) in each group is greater than or equal to one.

4. The scroll compressor according to claim 1, characterized in that, The connecting channel (21) is formed on the support assembly (20) or the connecting channel (21) is formed on the stationary vortex disk (40).

5. The scroll compressor according to claim 1, characterized in that, The plurality of oil suction holes (31) includes a first oil suction hole (311) and a second oil suction hole (312), wherein the first oil suction hole (311) is located below the second oil suction hole (312). The second oil suction hole (312) is connected to the communicating channel (21); and / or The end of the connecting channel (21) is connected to the intermediate cavity (50).

6. The scroll compressor according to claim 1, characterized in that, The flow area of ​​the second connecting segment (213) is greater than that of the first connecting segment (211).

7. The scroll compressor according to claim 1, characterized in that... The moving vortex (30) has a moving vortex oil storage cavity (32), at least one of the oil suction holes (31) is located in the moving vortex oil storage cavity (32), and the oil outlet hole (214) is connected to the oil suction hole (31) through the moving vortex oil storage cavity (32).

8. The scroll compressor according to claim 7, characterized in that, The oil inlet of the moving vortex oil storage chamber (32) is located directly below the oil outlet (214); and / or the oil suction hole (31) is located in the bottom region of the moving vortex oil storage chamber (32).

9. The scroll compressor according to claim 7, characterized in that, The diameter of the oil outlet hole (214) is less than or equal to the diameter of the oil suction hole (31) located in the oil outlet chamber of the moving vortex (30).

10. The scroll compressor according to claim 7, characterized in that, The moving scroll (30) has a flange (33) at its outer edge. At least a portion of the flange (33) is recessed toward the center of the moving scroll (30) and together with the support assembly (20) forms the oil storage cavity (32) of the moving scroll.

11. The scroll compressor according to claim 1, characterized in that, The support assembly (20) includes: The support body (22) has a communicating groove; Wear-resistant plate (23) is disposed between the support body (22) and the stationary vortex disk (40). The wear-resistant plate (23) and the connecting groove form the connecting channel (21). The wear-resistant plate (23) has an oil inlet hole (231) and an oil outlet hole (214). The oil return channel (41) is connected to the connecting channel (21) through the oil inlet hole (231). The oil outlet hole (214) is connected to the oil suction hole (31).

12. The scroll compressor according to claim 1, characterized in that, The moving scroll (30) has a spiral moving scroll profile (34) on its end face facing the stationary scroll (40). All the oil suction holes (31) include a first oil suction hole (311) and a second oil suction hole (312) symmetrically arranged along the axial direction of the moving scroll (30). The first oil suction hole (311) is located at the end of the moving scroll profile (34) away from the center of the moving scroll (30).

13. The scroll compressor according to claim 12, characterized in that, The first oil suction hole (311) is located at the end of the moving scroll profile (34) and inside the center of the moving scroll (30), while the second oil suction hole (312) is located outside the moving scroll profile (34).

14. The scroll compressor according to claim 1, characterized in that, The oil outlet (214) is located at the center of the running trajectory of the oil suction hole (31). The scroll compressor also includes a bent central section (70). The oil outlet (214) is connected to the oil suction hole (31) through the central section (70). The central section (70) passes through the oil outlet (214) and can rotate around the axis of the oil outlet (214).

15. The scroll compressor according to any one of claims 1 to 14, characterized in that, The stationary vortex disk (40) has a spiral stationary vortex disk profile (42) on its end face facing the moving vortex disk (30). The stationary vortex disk profile (42) is located within the movement range of the oil suction hole (31). As the moving vortex disk (30) moves, the stationary vortex disk profile (42) and the oil suction hole (31) switch between aligned blocking and avoidance and staggered states, so that the oil suction hole (31) is intermittently connected to the low-pressure chamber (61).

16. The scroll compressor according to any one of claims 1 to 14, characterized in that, The moving scroll (30) has a slotted structure (35) for mounting a ring structure or adjusting a counterweight. The oil suction hole (31) is located at the edge of the slotted structure (35) and communicates with the slotted structure (35).

17. The scroll compressor according to any one of claims 1 to 3, characterized in that, The support assembly (20) has an oil return groove (24), the stationary volute (40) has an oil return channel (41), the oil return channel (41) is connected to the intermediate cavity (50) through the oil return groove (24), the moving volute (30) has an oil suction groove (36), the top of the oil suction groove (36) is connected to the oil suction hole (31), the oil suction groove (36) extends downward along the circumference of the moving volute (30) and is connected to the intermediate cavity (50).

18. The scroll compressor according to any one of claims 1 to 14, characterized in that, The housing (10) has an air intake chamber and an oil storage chamber (11). The support assembly (20) has a gas channel (25). The air intake chamber is connected to the compression chamber through the gas channel (25). The height of the gas channel (25) is higher than the maximum preset height of the oil level in the oil storage chamber (11).

19. A heat exchange device, characterized in that, The scroll compressor includes any one of claims 1 to 18.

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