Scroll compressor and air conditioner having the same

Abstract

The present invention provides a scroll compressor and an air conditioner having the same. The scroll compressor includes a moving scroll; a fixed scroll, the fixed scroll is arranged in cooperation with the moving scroll, the fixed scroll is provided with a fixed scroll oil groove, the fixed scroll oil groove is extended along the circumference of the fixed scroll, and an oil supply capillary hole connected to the fixed scroll oil groove is provided on the end surface of the fixed scroll facing the moving scroll. The fixed scroll oil groove is provided on the fixed scroll, and the oil supply capillary hole connected to the fixed scroll oil groove is provided on the end surface of the fixed scroll facing the moving scroll. This arrangement allows the lubricating oil in the fixed scroll oil groove to be evenly covered on the end surfaces of the moving scroll and the fixed scroll through the oil supply capillary holes, effectively reducing the wear of the moving scroll and the fixed scroll, and improving the reliability of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioner equipment, and in particular to a scroll compressor and an air conditioner having the same. Background Art

[0002] Scroll compressors are widely used in refrigeration, air conditioning, heat pumps and other fields due to their high efficiency, small size, light weight and stable operation. Generally speaking, a scroll compressor consists of a closed housing, a fixed scroll, a movable scroll, a bracket, a crankshaft, an anti-rotation mechanism oil supply device and a motor. The profiles of the movable and fixed scrolls are both spiral. The movable scroll is eccentric to the fixed scroll and installed 180° apart, so multiple crescent-shaped spaces are formed between the movable and fixed scrolls. When the movable scroll rotates with the center of the fixed scroll as the center and rotates at a certain rotation radius without self-rotation, the outer crescent-shaped space will continue to move toward the center. At this time, the refrigerant is gradually pushed to the center space, and its volume continues to shrink while the pressure continues to increase until it is connected to the central exhaust hole. The high-pressure refrigerant is discharged from the pump body to complete the compression process.

[0003] When the compressor is running, its key internal parts, the moving scroll and the stationary scroll, move in close contact, and the corresponding contact surfaces will produce relative friction. The wear problem of the moving and stationary disks of the scroll compressor has always been an issue that needs to be focused on when designing the compressor. The general technical solution for scroll compressors used in the field of multi-split air conditioners is to use single or simultaneous surface phosphating treatment of the moving disk and the stationary disk, and design an oil groove on the end face of the stationary disk to ensure that there is sufficient lubricating oil on the end faces of the moving and stationary disks. Some compressor manufacturers will also design oil grooves on the moving disk. The general stationary disk oil groove is shown in the figure below, which is divided into medium-pressure oil grooves and high-pressure oil grooves according to the pressure at the oil inlet:

[0004] The complex shape of the oil groove brings difficulties in processing and is not conducive to the smoothness of the end surface of the stator plate. In addition, oil needs to be drawn from different positions, and the corresponding positions of the stator plate, bracket and other parts need to cooperate with the processing of oil drawing holes, which makes the parts processing steps more and more difficult. The oil is stored in the oil groove, and the oil on the other end surfaces needs to rely on the relative sliding of the moving plate and the refrigerant pressure difference to migrate, which makes the oil film thickness on the end surfaces of the moving and static plates uneven, causing wear problems.

[0005] The prior art provides a structure for supplying oil to the end face of a static disk. According to the pressure distribution of the refrigerant during operation and the running trajectory of the dynamic and static disks, the static side oil groove and the dynamic side oil groove are distinguished. This is a conventional means in the industry to solve the problem of supplying oil to the end face of the static disk. However, there are problems such as complex oil groove structure and difficulty in processing. The prior art also provides a structure in which the oil groove on the end face of the static disk is combined with the exhaust oil distribution. While lubricating the end face of the static disk, it reduces the oil circulation rate of the exhaust gas. However, it cannot avoid the problem of complex oil groove structure and difficulty in processing. The prior art also provides a structure for lubricating the friction surface of the dynamic and static disks, but its structure is difficult to process and reduces the strength of the movable scroll disk, which brings reliability problems.

[0006] Among the existing technical solutions, the common solution in the industry is to process oil grooves on the end faces of the moving and static scroll plates. With the requirements of diversified functions, such as reducing the oil circulation rate and distinguishing between high and low pressure oil grooves, the structure has become more and more complicated, which has brought difficulties in processing and is not conducive to the smoothness of the end faces of the moving and static plates. In addition, oil needs to be drawn from different positions, and the corresponding positions of the static plate, bracket and other parts need to cooperate with the processing of oil drawing holes, which makes the parts processing steps more and more difficult; the oil is stored in the oil groove, and the oil on other end faces needs to rely on the relative sliding of the moving plate and the refrigerant pressure difference to migrate, which makes the oil film thickness on the end faces of the moving and static plates uneven, causing wear problems. Summary of the invention

[0007] The main purpose of the present invention is to provide a scroll compressor and an air conditioner having the same, so as to solve the problem of uneven oil film thickness on the end surfaces of the moving and stationary plates in the prior art, which causes wear of the moving and stationary plates.

[0008] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a scroll compressor is provided, comprising: a movable scroll; a stationary scroll, the stationary scroll being arranged in coordination with the movable scroll, the stationary scroll being provided with a stationary scroll oil groove, the stationary scroll oil groove being extended along the circumference of the stationary scroll, and an oil supply capillary hole connected to the stationary scroll oil groove is provided on the end surface of the stationary scroll facing the movable scroll.

[0009] Furthermore, the fixed scroll has a first end face facing the movable scroll, the fixed scroll oil groove is opened on the second end face of the fixed scroll opposite to the first end face, the fixed scroll oil groove is extended along the circumference of the fixed scroll, and the oil supply capillary hole is opened at the bottom of the fixed scroll oil groove.

[0010] Furthermore, the scroll compressor further includes: an oil groove cover plate, which is connected to the second end surface to seal the oil groove of the fixed scroll plate.

[0011] Further, there are a plurality of oil supply capillary holes, and the plurality of oil supply capillary holes are arranged at intervals along the circumferential direction of the fixed scroll and / or the radial direction of the fixed scroll.

[0012] Further, the axis of at least one of the plurality of oil supply capillary holes is arranged at an angle to the vertical axis.

[0013] Furthermore, the stationary scroll plate includes: a stationary scroll lower plate, a first end of which is arranged toward the movable scroll plate; a stationary scroll upper plate, a first end of which is connected to the second end of the stationary scroll lower plate, a suction channel is provided at the second end of the stationary scroll upper plate, a stationary scroll plate oil groove is provided on the end face of at least one of the second end of the stationary scroll lower plate and the first end of the stationary scroll upper plate, and an oil supply capillary hole is provided on the first end of the stationary scroll lower plate.

[0014] Furthermore, the static scroll lower disk is provided with static scroll lower disk teeth, and the static scroll upper disk is provided with static scroll upper disk teeth corresponding to the static scroll lower disk teeth one by one, and both the static scroll lower disk teeth and the static scroll upper disk teeth are arranged to mesh with the teeth of the movable scroll disk, or, the static scroll lower disk is an annular structure, and the static scroll upper disk is provided with static scroll upper disk teeth meshing with the teeth of the movable scroll disk.

[0015] Furthermore, an oil supply passage is provided at one end of the fixed scroll facing the movable scroll, one end of the oil supply passage is connected to the oil groove of the fixed scroll, and the other end of the oil supply passage is connected to the oil pool.

[0016] Furthermore, the upper oil passage includes: a first hole section, the first hole section is extended in the vertical direction, and the first end of the first hole section is connected to the oil groove of the static vortex plate; a second hole section, the second hole section is extended in the radial direction of the static vortex plate, the first end of the second hole section is connected to the second end of the first hole section, and the second end of the second hole section extends to the outer surface of the static vortex lower plate; a third hole section, the first end of the third hole section is connected to the second hole section, and the second end of the third hole section is connected to the oil pool, wherein the static vortex lower plate is provided with a seal for sealing the second end of the second hole section.

[0017] Furthermore, the scroll compressor also includes: an upper bracket, the upper bracket is connected to the fixed scroll plate, the movable scroll plate is located between the upper bracket and the fixed scroll plate, the upper bracket is provided with an upper bracket oil pool and an oil supply passage, one end of the oil supply passage is connected to the upper bracket oil pool, and the other end of the oil supply passage is connected to the fixed scroll plate oil groove.

[0018] Furthermore, the upper bracket is provided with a throttling member, and a portion of the throttling member extends into the oil supply passage.

[0019] Furthermore, the radius of the stationary scroll disk is r, and the radius of the opening area of ​​the oil supply capillary hole is r1, wherein 0.69r≤r1≤0.87r.

[0020] Furthermore, a plurality of oil supply capillaries are arranged at intervals along the radial direction of the fixed scroll disk to form inner layer high pressure oil holes and outer layer medium pressure oil holes, and the diameters of the oil supply capillaries forming the inner layer high pressure oil holes or the outer layer medium pressure oil holes are the same.

[0021] Further, the diameter of the oil supply capillary holes forming the inner layer high pressure oil holes is different from the diameter of the oil supply capillary holes forming the outer layer medium pressure oil holes.

[0022] Furthermore, the upper bracket is also provided with an oil return passage, one end of the oil return passage is connected to the upper bracket oil pool, and the other end of the oil return passage is connected to the bottom oil pool of the scroll compressor.

[0023] Furthermore, the radius of the oil supply capillary pore is d, where ρ is the refrigerant density; v is the flow velocity of the lubricating oil in the oil supply passage; p 排 is the exhaust pressure of the compressor; p 中 is the intermediate pressure of the compressor.

[0024] According to another aspect of the present invention, an air conditioner is provided, comprising a scroll compressor, wherein the scroll compressor is the above-mentioned scroll compressor.

[0025] By applying the technical solution of the present invention, a fixed scroll oil groove is provided on the fixed scroll, and an oil supply capillary hole connected to the fixed scroll oil groove is provided on the end surface of the fixed scroll facing the movable scroll. This arrangement allows the lubricating oil in the fixed scroll oil groove to be evenly covered on the end surfaces of the movable scroll and the fixed scroll through the oil supply capillary hole, effectively reducing the wear of the movable scroll and the fixed scroll, and improving the reliability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 A schematic cross-sectional view of a first embodiment of a compressor according to the present invention is shown;

[0028] Figure 2 A schematic cross-sectional view of a second embodiment of a compressor according to the present invention is shown;

[0029] Figure 3 A schematic structural diagram of a first embodiment of a fixed scroll according to the present invention is shown;

[0030] Figure 4 A schematic structural diagram of a second embodiment of a fixed scroll according to the present invention is shown;

[0031] Figure 5 A schematic structural diagram of a third embodiment of a fixed scroll according to the present invention is shown;

[0032] Figure 6 A schematic structural diagram of an embodiment of an oil tank cover plate according to the present invention is shown;

[0033] Figure 7 A schematic structural diagram of a fourth embodiment of a fixed scroll according to the present invention is shown;

[0034] Figure 8 A schematic structural diagram of an embodiment of an upper bracket according to the present invention is shown;

[0035] Fig. 9A schematic diagram showing the relationship between the capillary oil return hole diameter and the internal discharge pressure and the intermediate pressure of the compressor according to the present invention is shown;

[0036] Fig.10 A schematic cross-sectional view of a fifth embodiment of a fixed scroll according to the present invention is shown;

[0037] Fig.11 A schematic cross-sectional view of a sixth embodiment of a stationary scroll according to the present invention is shown;

[0038] Fig.12 A schematic structural diagram of a seventh embodiment of a fixed scroll according to the present invention is shown;

[0039] Fig.13 A schematic structural diagram of an eighth embodiment of a fixed scroll according to the present invention is shown;

[0040] Fig.14 A schematic structural diagram of a ninth embodiment of a fixed scroll according to the present invention is shown.

[0041] The above drawings include the following reference numerals:

[0042] 1. Intake pipe; 2. Upper cover;

[0043] 3. Stationary scroll plate; 31. Stationary scroll plate oil groove; 311. Stationary scroll upper plate; 312. Stationary scroll lower plate; 313. Stationary scroll lower plate teeth; 314. Stationary scroll upper plate teeth;

[0044] 32. Oil supply capillary holes; 33. Oil supply passage;

[0045] 4. Anti-autobiography institutions;

[0046] 5. Upper bracket; 51. Upper bracket oil pool; 52. Oil supply passage; 53. Oil return passage;

[0047] 6. Exhaust pipe; 7. Motor; 8. Lower bracket; 9. Lubricating oil pool; 10. Lower cover; 11. Oil supply device; 12. Second bearing; 13. Third balance block; 14. Main shaft; 15. Second balance block; 16. First bearing; 17. First balance block; 18. Sliding bearing; 19. Moving scroll;

[0048] 20. Oil tank cover; 21. Throttle element; 22. Sealing element; 23. Fixed scroll fastening screws. DETAILED DESCRIPTION

[0049] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0052] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0053] Combination Figures 1 to 14 As shown, according to a specific embodiment of the present application, a scroll compressor is provided.

[0054] Specifically, Figure 1 and Figure 2 As shown, the compressor includes an orbiting scroll 19 and a fixed scroll 3. The fixed scroll 3 is arranged in cooperation with the orbiting scroll 19, and the fixed scroll 3 is provided with a fixed scroll oil groove 31, which is extended along the circumference of the fixed scroll 3, and an oil supply capillary hole 32 connected to the fixed scroll oil groove 31 is opened on the end surface of the fixed scroll 3 facing the orbiting scroll 19.

[0055] In this embodiment, a fixed scroll oil groove 31 is provided on the fixed scroll 3, and an oil supply capillary hole 32 connected to the fixed scroll oil groove 31 is provided on the end surface of the fixed scroll 3 facing the movable scroll 19. This arrangement allows the lubricating oil in the fixed scroll oil groove 31 to be evenly covered on the end surfaces of the movable scroll 19 and the fixed scroll 3 through the oil supply capillary hole 32, effectively reducing the wear of the movable scroll 19 and the fixed scroll 3, and improving the reliability of the compressor.

[0056] Among them, Figures 2 to 4 As shown, the fixed scroll 3 has a first end face facing the movable scroll 19, the fixed scroll oil groove 31 is provided on the second end face of the fixed scroll 3 opposite to the first end face, the fixed scroll oil groove 31 is extended along the circumference of the fixed scroll 3, and the oil supply capillary hole 32 is provided at the bottom of the fixed scroll oil groove 31. Such an arrangement can increase the coverage of the fixed scroll oil groove 31 in the circumference of the fixed scroll 3, making it easier to open the oil supply capillary hole 32 on the end face of the fixed scroll 3.

[0057] In order to improve the sealing performance of the fixed scroll oil groove 31, the scroll compressor is further provided with an oil groove cover plate 20. The oil groove cover plate 20 is connected to the second end surface to seal the fixed scroll oil groove 31.

[0058] Preferably, there are multiple oil supply capillary holes 32, and the multiple oil supply capillary holes 32 are arranged at intervals along the circumference of the fixed scroll 3 and the radial direction of the fixed scroll 3. Such an arrangement can evenly cover the lubricating oil on the end surfaces of the fixed scroll 3 and the movable scroll 19.

[0059] Among them, the axis of at least one of the plurality of oil supply capillary holes 32 is arranged at an angle to the vertical axis. Fig.10 As shown, the oil supply capillary holes 32 are arranged obliquely, and such an arrangement can also play a role in evenly lubricating the orbiting scroll 19 and the fixed scroll 3.

[0060] According to another embodiment of the present application, Fig.11 As shown, the fixed scroll plate 3 includes a fixed scroll upper plate 311 and a fixed scroll lower plate 312, and the first end of the fixed scroll lower plate 312 is arranged toward the movable scroll plate 19. The first end of the fixed scroll upper plate 311 is connected to the second end of the fixed scroll lower plate 312, and the second end of the fixed scroll upper plate 311 is provided with an air intake passage, and a fixed scroll oil groove 31 is provided on the end surface of at least one of the second end of the fixed scroll lower plate 312 and the first end of the fixed scroll upper plate 311, and the oil supply capillary hole 32 is provided on the first end of the fixed scroll lower plate 312. Such an arrangement can reduce the difficulty of processing the fixed scroll oil groove 31.

[0061] In this embodiment, the fixed scroll lower disk 312 is provided with fixed scroll lower disk teeth 313, and the fixed scroll upper disk 311 is provided with fixed scroll upper disk teeth 314 corresponding to the fixed scroll lower disk teeth 313 one by one, and the fixed scroll lower disk teeth 313 and the fixed scroll upper disk teeth 314 are both arranged to mesh with the teeth of the movable scroll 19. Or, as Fig.14 As shown, the fixed scroll lower plate 312 is an annular structure, and the fixed scroll upper plate 311 is provided with fixed scroll upper plate teeth 314 meshing with the teeth of the movable scroll plate 19. Such an arrangement can effectively reduce the processing difficulty of the fixed scroll plate 3.

[0062] Among them, an oiling passage 33 is provided at one end of the fixed scroll 3 facing the movable scroll 19, one end of the oiling passage 33 is connected to the fixed scroll oil groove 31, and the other end of the oiling passage 33 is connected to the oil pool. This arrangement can facilitate the lubricating oil in the oil pool to smoothly enter the fixed scroll oil groove 31.

[0063] Specifically, the upper oil passage 33 includes a first hole segment, a second hole segment and a third hole segment. The first hole segment is extended in the vertical direction, and the first end of the first hole segment is connected to the fixed vortex plate oil groove 31. The second hole segment is extended in the radial direction of the fixed vortex plate 3, and the first end of the second hole segment is connected to the second end of the first hole segment, and the second end of the second hole segment extends to the outer surface of the fixed vortex lower plate 312; the first end of the third hole segment is connected to the second hole segment, and the second end of the third hole segment is connected to the oil pool, wherein the fixed vortex lower plate 312 is provided with a seal 22 for sealing the second end of the second hole segment. Such a setting can ensure that the lubricating oil flows into the fixed vortex plate oil groove 31 without oil leakage.

[0064] like Figure 8 As shown, the scroll compressor also includes an upper bracket 5. The upper bracket 5 is connected to the fixed scroll 3, and the movable scroll 19 is located between the upper bracket 5 and the fixed scroll 3. The upper bracket 5 is provided with an upper bracket oil pool 51 and an oil supply passage 52. One end of the oil supply passage 52 is connected to the upper bracket oil pool 51, and the other end of the oil supply passage 52 is connected to the fixed scroll oil groove 31. This arrangement can prevent the fixed scroll oil groove 31 from obtaining lubricating oil from the compressor oil pool located below the upper bracket 5, resulting in too long a time to obtain lubricating oil, causing friction damage between the movable scroll 19 and the fixed scroll 3 due to lack of oil. This arrangement can effectively shorten the time for the movable scroll 19 and the fixed scroll 3 to obtain lubricating oil, and effectively ensure that there is always sufficient lubricating oil between the movable scroll 19 and the fixed scroll 3.

[0065] Furthermore, the upper bracket 5 is provided with a throttle 21, and part of the throttle 21 extends into the oil supply passage 52. Rotating the throttle 21 can pass oil and ensure that high and low pressures are not connected.

[0066] like Figure 3 As shown, the radius of the fixed scroll 3 is r, and the radius of the opening area of ​​the oil supply capillary hole 32 is r1, wherein 0.69r≤r1≤0.87r. The maximum range of the opening area of ​​the oil supply capillary hole 32 is as follows: Figure 3 In the area between circle A and circle B in the embodiment, such an arrangement can effectively ensure that the lubricating oil on the end surfaces of the orbiting scroll 19 and the fixed scroll 3 is more evenly distributed.

[0067] Furthermore, a plurality of oil supply capillary holes 32 are arranged at intervals along the radial direction of the fixed scroll 3 to form an inner layer of high pressure oil holes and an outer layer of medium pressure oil holes, and the diameters of the oil supply capillary holes 32 forming the inner layer of high pressure oil holes or the outer layer of medium pressure oil holes are the same. Such an arrangement can improve the oil supply efficiency of the oil supply capillary holes 32.

[0068] like Figure 8 As shown, the upper bracket 5 is also provided with an oil return passage 53. One end of the oil return passage 53 is connected to the upper bracket oil pool 51, and the other end of the oil return passage 53 is connected to the bottom oil pool of the scroll compressor. This arrangement can timely discharge the excess lubricating oil in the upper bracket oil pool 51 into the oil pool of the compressor.

[0069] Preferably, the radius of the oil supply capillary hole 32 is d, wherein, ρ is the refrigerant density; v is the flow velocity of the lubricating oil in the oil supply passage 52; p 排 is the exhaust pressure of the compressor; p 中 is the intermediate pressure of the compressor.

[0070] The compressor in the above embodiment can also be used in the technical field of air conditioner equipment. That is, according to another aspect of the present invention, an air conditioner is provided, including a scroll compressor, and the scroll compressor is the scroll compressor in the above embodiment.

[0071] Specifically, the compressor of the present application solves the wear problem of the moving and static disks when the compressor is running, and effectively reduces the processing difficulty of the moving and static scroll disks, making the oil supply of the moving and static disks more stable and uniform, improving the lubrication efficiency, reducing the oil-gas mixing rate, and improving the operating reliability of the compressor.

[0072] Specifically, the upper bracket oil pool and the end faces of the moving and stationary discs are connected through the oil supply passage of the upper bracket and the oil supply capillary holes on the fixed vortex disc. When the compressor is running, the end faces of the moving and stationary discs are at the suction pressure and the intermediate pressure, while the upper bracket oil pool is at the exhaust pressure, so the lubricating oil can be supplied from the upper bracket oil pool to the end faces of the moving and stationary discs through the pressure difference. Among them, the throttling part is a throttling screw, which can prevent cross-flow and excessive oil supply.

[0073] When the compressor is operating normally, the motor 7 drives the main shaft 14 to operate, and the main shaft then drives the movable scroll and the oil supply device 11 to operate. The oil supply device extends into the lubricating oil pool 9, and supplies oil to each friction pair in the compressor through the principle of differential pressure supply or oil pump supply to ensure the normal operation of the compressor. The friction pairs inside the scroll compressor are: the fixed scroll and the end face of the movable scroll, the bottom surface of the movable scroll and the anti-self-rotation mechanism 4, the anti-self-rotation mechanism and the upper bracket, the movable scroll and the upper bracket, the sliding bearing 18 and the main shaft, the first bearing 16 and the main shaft, and the second bearing 12 and the main shaft. The oil supply device sucks oil and pumps the lubricating oil up through the oil supply hole on the main shaft. The main shaft has oil holes at the first bearing and the second bearing to achieve lubrication. The lubricating oil is pumped to the top of the main shaft to lubricate the sliding bearing. The lubricating oil then flows to the upper bracket oil pool through the gap between the sliding bearing and the main shaft, and is disturbed by the first balancing block to form oil mist, which is supplied to the upper bracket, the anti-self-rotation device, and the back of the movable disk to lubricate each friction pair. The lubricating oil then returns to the oil pool at the bottom of the compressor through the oil return passage of the upper bracket.

[0074] The current technical solution is generally to set medium and high pressure oil inlet holes on the back of the moving plate, and the lubricating oil enters the oil inlet groove on the end face of the fixed scroll plate through the oil inlet holes to achieve end face lubrication, which is the structure described in the background technology.

[0075] The bottom surface and side wall of the scroll teeth of the moving and static scroll plates are lubricated by the oil brought by the compressor suction, which is inconsistent with the source of lubricating oil in other friction pairs. In order to avoid a series of problems caused by the complex structure of the oil groove on the end face of the static plate, capillaries can be used to supply oil to the end face of the static plate. The upper bracket oil pool is at the exhaust high pressure, and the end faces of the moving and static plates are at the suction and intermediate pressure. By using this pressure difference, the lubricating oil can be pressed into the oil groove of the static plate. The oil supply passage consists of the upper bracket oil passage and the static plate oil supply passage. The throttling screw can ensure that the oil supply speed is not too fast and maintain the pressure difference. The sealing screw realizes the sealing of the upper bracket and the static plate oil hole, which is a process measure. The oil groove cover can realize pressure sealing and ensure that no foreign matter enters the oil groove, thereby entering the end faces of the moving and static plates and affecting the operation of the compressor. The capillaries are evenly distributed on the end face of the static plate to ensure uniform and appropriate oil supply; too much lubricating oil will affect the seal, and too little will cause wear. The capillary pores are divided into two layers, the outer layer is the medium-pressure oil hole, and the inner layer is the high-pressure oil hole. The diameter of each layer of oil holes is consistent, and the diameters of the two layers of oil holes may be inconsistent.

[0076] Since the contact area of ​​the end faces of the moving and static disks is smaller than that of the static disk, and the sealing of the end faces of the moving and static disks must be ensured at the same time, referring to the distribution of the static disk oil groove, the opening of the capillary holes on the static disk end face should be arranged within the range of 0.69 to 0.87 times the diameter of the static disk. The opening of the capillary holes in the oil groove is sufficient for use, that is, the capillary holes can be straight holes, curved holes, etc. The diameter of the capillary holes directly affects the operation of the compressor: if the diameter is too small, the oil supply is insufficient, which brings wear problems; if the diameter is too large, the high-pressure refrigerant in the upper bracket and the low-pressure refrigerant on the end faces of the moving and static disks will cross-flow, causing the moving scroll disk to sink, the suction is not sealed, and other problems, which will cause the cooling capacity to decrease and the power consumption to increase when the compressor is running. Therefore, special attention should be paid to the capillary hole diameter d.

[0077] According to the simple pressure-kinetic energy conversion model, the oil filling speed v and the exhaust pressure p 排 , intermediate pressure p 中 satisfy:

[0078]

[0079] The intermediate pressure p 中 It refers to the pressure of the medium-pressure oil inlet groove of the orbiting scroll plate when the oil groove technology on the end surface of the static disk is applied; m is the mass flow rate of the refrigerant.

[0080] And: m = ρ·A·v, ρ is the refrigerant density, and A is the cross-sectional area of ​​the oil supply capillary pores.

[0081] but:

[0082] That is, the relationship between the diameter of the oil supply capillary pores and the internal pressure of the compressor, and its curve is as follows Fig. 9 .

[0083] Since the refrigerant pressure is related to the working conditions and is not constant, when determining the diameter of the oil supply capillary hole, the most commonly used working conditions are selected for reference calculation. If the oil supply capillary hole is not circular, it can be calculated according to the wetted perimeter area.

[0084] The diameter of the upper oil hole of the upper bracket and the static scroll plate is sufficient for use. The upper oil hole of the upper bracket opens in the upper bracket oil pool and must be lower than the position of the upper bracket oil return hole, otherwise the lubricating oil will directly return to the oil pool at the bottom of the compressor and cannot be supplied to the end surface of the dynamic and static plates. The upper oil hole of the upper bracket can be opened with an inclined hole or a straight hole.

[0085] like Fig.10As shown in the figure, the oil supply capillary holes on the static scroll disk are designed as non-straight holes, and the axes of the inner and outer oil holes may not be parallel. This can bring convenience in structure and process, that is, compressors of different models and displacements can be designed according to the corresponding appropriate layout. The opening position of the oil supply capillary holes on the end face of the static disk must also be guaranteed to be within the range of 0.69 to 0.87 times the diameter of the static disk to ensure the sealing of the end faces of the dynamic and static disks.

[0086] like Fig.11 , Fig.12 As shown, the static vortex disk is cut horizontally from the middle into two parts: the static vortex upper disk and the static vortex lower disk. The upper and lower parts are combined into a static vortex disk to realize the compression function. With this embodiment, the oil tank cover can be eliminated. In this embodiment, both the upper and lower disks have a part of the static vortex disk oil tank, which are combined together to realize the oil storage and sealing functions of the oil tank. The oil passage and the oil supply capillary of the static vortex disk are both in the static vortex lower disk. In this way, the oil tank is set inside the static vortex disk, which ensures the sealing of the oil tank. In order to ensure the processing accuracy of structures such as vortex teeth and suction holes, the upper and lower disks are respectively processed with oil tanks, assembled accordingly, connected into one with static vortex disk fastening screws 23, and then carried out subsequent processing.

[0087] The cross section only needs to be in the middle of the oil groove to ensure the oil groove processing, and there are no other restrictions on the position. The cross section can cross each passage, volute, air intake hole, exhaust hole, etc. The cross section is not limited to a plane, and can be a stepped surface, an inclined surface, etc.

[0088] like Fig.13 and Fig.14 As shown, in order to ensure the consistency of the volute processing, in this embodiment, the oil groove of the fixed scroll is cut and separated, and the volute is not cut. This not only realizes the setting of the oil groove inside the fixed scroll, but also ensures the sealing performance of the oil groove and the consistency of processing. Figure 1 As shown, the compressor is also provided with an exhaust pipe 6 , a second balancing block 15 , and a first balancing block 17 .

[0089] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0090] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0091] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A scroll compressor, characterized in that: include: A movable scroll (19); A fixed scroll (3), the fixed scroll (3) being arranged in cooperation with the movable scroll (19), the fixed scroll (3) being provided with a fixed scroll oil groove (31), the fixed scroll oil groove (31) being arranged to extend along the circumference of the fixed scroll (3), and an oil supply capillary hole (32) communicating with the fixed scroll oil groove (31) being provided on an end surface of the fixed scroll (3) facing the movable scroll (19); The fixed scroll (3) has a first end face facing the movable scroll (19); the fixed scroll oil groove (31) is provided at a second end face of the fixed scroll (3) opposite to the first end face; the fixed scroll oil groove (31) is extended along the circumferential direction of the fixed scroll (3); and the oil supply capillary hole (32) is provided at the bottom of the fixed scroll oil groove (31); The fixed scroll disk (3) comprises: a stationary scroll lower plate (312), wherein a first end of the stationary scroll lower plate (312) is arranged toward the orbiting scroll plate (19); an upper plate (311) of a stationary scroll, wherein a first end of the upper plate (311) of the stationary scroll is connected to a second end of the lower plate (312) of the stationary scroll, an air intake passage is provided at the second end of the upper plate (311), an oil groove (31) of the stationary scroll is provided on an end surface of at least one of the second end of the lower plate (312) of the stationary scroll and the first end of the upper plate (311), and the oil supply capillary hole (32) is provided on the first end of the lower plate (312); The static scroll lower disk (312) is provided with static scroll lower disk teeth (313), and the static scroll upper disk (311) is provided with static scroll upper disk teeth (314) corresponding one-to-one to the static scroll lower disk teeth (313), and the static scroll lower disk teeth (313) and the static scroll upper disk teeth (314) are both arranged to mesh with the teeth of the movable scroll disk (19).

2. The scroll compressor according to claim 1, characterized in that: The scroll compressor also includes: An oil groove cover plate (20), the oil groove cover plate (20) being connected to the second end surface to seal the fixed scroll oil groove (31).

3. The scroll compressor according to any one of claims 1 to 2, characterized in that: There are a plurality of the oil supply capillary holes (32), and the plurality of the oil supply capillary holes (32) are arranged at intervals along the circumferential direction of the fixed scroll (3) and / or along the radial direction of the fixed scroll (3).

4. The scroll compressor according to claim 3, characterized in that: The axis of at least one of the plurality of oil supply capillary holes (32) is arranged at an angle to the vertical axis.

5. The scroll compressor according to claim 1, characterized in that: An oil supply passage (33) is provided at one end of the fixed scroll (3) facing the movable scroll (19); one end of the oil supply passage (33) is connected to the fixed scroll oil groove (31); and the other end of the oil supply passage (33) is connected to the oil pool.

6. The scroll compressor according to claim 5, characterized in that: The oil supply passage (33) comprises: a first hole section, the first hole section extending in a vertical direction, a first end of the first hole section being in communication with the fixed scroll plate oil groove (31); a second hole segment, the second hole segment extending in the radial direction of the fixed scroll plate (3), the first end of the second hole segment being connected to the second end of the first hole segment, the second end of the second hole segment extending to the outer surface of the fixed scroll lower plate (312); A third hole segment, wherein a first end of the third hole segment is connected to the second hole segment, and a second end of the third hole segment is connected to the oil pool, wherein the static scroll lower plate (312) is provided with a sealing member (22) for sealing the second end of the second hole segment.

7. The scroll compressor according to claim 1, characterized in that: The scroll compressor also includes: An upper bracket (5), the upper bracket (5) being connected to the fixed scroll (3), the movable scroll (19) being located between the upper bracket (5) and the fixed scroll (3), the upper bracket (5) being provided with an upper bracket oil pool (51) and an oil supply passage (52), one end of the oil supply passage (52) being connected to the upper bracket oil pool (51), and the other end of the oil supply passage (52) being connected to the fixed scroll oil groove (31).

8. The scroll compressor according to claim 7, characterized in that: The upper bracket (5) is provided with a throttling member (21), and a portion of the throttling member (21) extends into the oil supply passage (52).

9. The scroll compressor according to claim 1, characterized in that: The radius of the static scroll disk (3) is r, and the radius of the opening area of ​​the oil supply capillary hole (32) is r1, wherein 0.69 r≤r1≤0.87r.

10. The scroll compressor according to claim 3, characterized in that: A plurality of the oil supply capillary holes (32) are arranged at intervals along the radial direction of the stationary scroll disk (3) to form an inner layer of high-pressure oil holes and an outer layer of medium-pressure oil holes, and the diameters of the oil supply capillary holes (32) forming the inner layer of high-pressure oil holes or the outer layer of medium-pressure oil holes are the same or different.

11. The scroll compressor according to claim 7, characterized in that: The upper bracket (5) is also provided with an oil return passage (53), one end of the oil return passage (53) is connected to the upper bracket oil pool (51), and the other end of the oil return passage (53) is connected to the bottom oil pool of the scroll compressor.

12. The scroll compressor according to claim 7, characterized in that: The radius of the oil supply capillary hole (32) is d, wherein: ； is the refrigerant density; v is the flow velocity of the lubricating oil in the oil supply passage (52); is the exhaust pressure of the compressor; is the intermediate pressure of the compressor.

13. An air conditioner comprising a scroll compressor, characterized in that: The scroll compressor is the scroll compressor according to any one of claims 1 to 12.

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