Compressor and air conditioner

Abstract

The present disclosure provides a compressor and an air conditioner. The compressor includes: a crankshaft, a pump body structure and a bracket. An oil supply hole is provided inside the crankshaft. The outer peripheral wall of the crankshaft is connected to the inner peripheral wall of the bracket through a first bearing. A first oil storage tank is provided inside the bracket and in contact with the first bearing. The oil in the oil supply hole can flow from the top of the crankshaft along the outer peripheral wall of the crankshaft and then pass through the first bearing to reach the first oil storage tank. The first oil storage tank can also transport the oil to the pump body end face of the pump body structure for lubrication. According to the present disclosure, lubricating oil can be received from the oil supply hole of the crankshaft and the downward channel from the top, and effectively transported to the pump body end face, so that lubricating oil can be provided to the pump body end face, ensuring the reliability of operation under extreme oil shortage conditions, and effectively solving the problems of insufficient oil supply of the compressor under low temperature and high speed, low temperature starting, defrosting and other working conditions, lack of sufficient lubricating oil in the oil supply channel of the pump body end face, and wear of the pump body due to oil shortage in the compressor.

Description

Technical Field

[0001] The present disclosure relates to the technical field of compressors, and in particular to a compressor and an air conditioner. 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] The oil circuit design of scroll compressor is a crucial system engineering, involving transmission parts, friction pairs, oil supply, oil return and other issues. Conventional scroll compressors adopt the arrangement of upper pump body and lower motor. There are oil holes in the crankshaft. The oil flows from the oil holes to each friction pair through pressure difference and positive displacement oil pump. Corresponding oil supply and oil return circuits are set at the friction pair positions such as bearings, pump bodies, and anti-rotation mechanisms to make the lubricating oil circulate and the compressor can work normally.

[0004] At the same time, the lubrication of the pump end face has become a problem that all scroll manufacturers have focused on. The end faces of the moving and stationary scroll plates are the friction pairs with the largest area and the most complex forces in the compressor. They need to be continuously supplied with lubricating oil to ensure the normal operation of the pump body, which requires the opening of a large number of oil circuits, but a large number of oil circuits will cause sealing problems. Therefore, various manufacturers provide various pump end face lubrication solutions.

[0005] Since the scroll compressor in the prior art has technical problems such as wear of the pump end surface due to lack of oil and inability to provide effective lubrication, the present invention studies and designs a compressor and an air conditioner. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present disclosure is to overcome the defects of the scroll compressor in the prior art that the end surface of the pump body is worn due to lack of oil and cannot provide effective lubrication, thereby providing a compressor and an air conditioner.

[0007] In order to solve the above problems, the present disclosure provides a compressor, comprising:

[0008] A crankshaft, a pump body structure and a bracket, wherein an oil supply hole is arranged inside the crankshaft, the outer circumferential wall of the crankshaft and the inner circumferential wall of the bracket are connected via a first bearing, a first oil storage tank is arranged inside the bracket and in contact with the first bearing, the oil in the oil supply hole can flow from the top of the crankshaft along the outer circumferential wall of the crankshaft and then pass through the first bearing to reach the first oil storage tank, and the first oil storage tank can also transport the oil to the pump body end face of the pump body structure for lubrication.

[0009] In some embodiments, the first oil storage tank extends along the radial direction inside the bracket and extends to connect with the outer peripheral wall of the first bearing; or, the first oil storage tank extends along the radial direction inside the bracket and extends to connect with the bottom of the first bearing.

[0010] In some embodiments, the pump body structure includes a static plate and a dynamic plate, and the pump body end surface is formed at the end surface where the static plate and the dynamic plate meet;

[0011] The compressor also includes a first oil supply channel and a second oil supply channel, the first oil supply channel is arranged inside the bracket, and the second oil supply channel is arranged inside the stator plate, one end of the first oil supply channel is connected to the first oil storage tank to absorb oil from the first oil storage tank, the other end of the first oil supply channel is connected to one end of the second oil supply channel, and the other end of the second oil supply channel can guide the oil to the end face of the pump body.

[0012] In some embodiments, the first oil supply passage includes a first oil groove, a second oil groove and a third oil groove, the first oil groove extends along the axial direction of the crankshaft, the third oil groove also extends along the axial direction of the crankshaft, the second oil groove is connected between the first oil groove and the third oil groove, the first oil groove can be connected with the first oil storage groove, so that the first oil storage groove, the first oil groove, the second oil groove and the third oil groove are connected in sequence, and the third oil groove is connected with the second oil supply passage inside the stator.

[0013] In some embodiments, the bottom section of the first oil groove is connected to the first oil storage groove, the first oil groove extends axially upward to be connected to one end of the second oil groove, the other end of the second oil groove extends to be connected to the third oil groove, and the third oil groove extends axially upward to be connected to the second oil supply channel.

[0014] In some embodiments, a throttle pin is inserted into the bottom of the third oil groove, and the throttle pin is inserted into the bottom of the third oil groove from bottom to top; and / or,

[0015] The first oil groove is opened along the axial direction of the crankshaft to the bottom end of the bracket, and a first sealing pin is also provided at the bottom end of the first oil groove;

[0016] The second oil groove extends to the outer peripheral wall of the bracket, and a second sealing pin is also provided at the portion of the second oil groove extending to the outer peripheral wall of the bracket.

[0017] In some embodiments, the second oil supply channel includes a fourth oil groove, a fifth oil groove and a sixth oil groove, the fifth oil groove is connected and arranged between the fourth oil groove and the sixth oil groove, the fourth oil groove can be connected to the first oil supply channel inside the bracket, and the sixth oil groove can be connected to the end surface where the stator plate and the movable plate are connected, so that the fourth oil groove, the fifth oil groove and the sixth oil groove are connected in sequence.

[0018] In some embodiments, the fourth oil groove extends in the axial direction of the crankshaft, the fifth oil groove extends in the radial direction of the crankshaft, and the sixth oil groove also extends in the axial direction of the crankshaft; and / or,

[0019] The fifth oil groove is opened along the radial direction of the crankshaft to the outer peripheral wall of the stator plate, and a third sealing pin is further provided at the portion of the fifth oil groove extending to the outer peripheral wall of the stator plate.

[0020] In some embodiments, the outer circumferential wall of the crankshaft is connected to the inner circumferential wall of the moving plate through a second bearing, and the outer circumferential wall of the crankshaft located below the second bearing is arranged to be a step structure, and the step structure and the lower end of the moving plate form a second oil storage tank, and the oil in the oil supply hole can flow from the top of the crankshaft along the outer circumferential wall of the crankshaft and then pass through the second bearing to reach the second oil storage tank, and the second oil storage tank can also transport the oil to the back pressure chamber of the compressor and / or to the outside of the bracket.

[0021] In some embodiments, the back pressure chamber is a groove structure opened on the upper end surface of the bracket, the back pressure chamber is opposite to the moving plate and can be connected to the compression chamber between the static plate and the moving plate, and the compressor also includes a seventh oil groove, the seventh oil groove is formed between the inner circumferential wall of the bracket and the outer circumferential wall of the moving plate, and one end of the seventh oil groove can be connected to the second oil storage tank, and the other end of the seventh oil groove can be connected to the back pressure chamber.

[0022] In some embodiments, the seventh oil groove extends along the axial direction of the crankshaft.

[0023] In some embodiments, the compressor further includes an eighth oil tank, which is disposed inside the bracket, one end of the eighth oil tank is connected to the second oil storage tank, and the other end of the eighth oil tank can guide the oil to the lower part of the bracket.

[0024] In some embodiments, the eighth oil groove extends along a radial direction of the crankshaft.

[0025] In some embodiments, the second oil storage tank is located above the first oil storage tank, and the oil passes through the second oil storage tank and then passes through the first bearing to reach the first oil tank.

[0026] In some embodiments, the first bearing is a sliding bearing or a rolling bearing:

[0027] When the first bearing is a sliding bearing, oil can flow through the gap between the sliding bearing and the inner circumferential wall of the bracket, and / or through the gap between the sliding bearing and the outer circumferential wall of the crankshaft; when the first bearing is a rolling bearing, oil can flow through the gap between the ball and the retaining ring of the rolling bearing.

[0028] The present disclosure also provides an air conditioner, which comprises the compressor described in any of the preceding items.

[0029] The compressor and air conditioner provided by the present disclosure have the following beneficial effects:

[0030] 1. The present invention adopts the structure of the first oil storage tank opened inside the bracket and connected to the bracket bearing (first bearing), so that lubricating oil can be received from the oil supply hole of the crankshaft and the downward channel at the top, and effectively transported to the end face of the pump body, so that lubricating oil can be provided to the end face of the pump body. Since the first oil storage tank is located at the lower end of the upper bracket bearing chamber (first bearing position) and also at the lower end of the upper bracket oil return passage, the lubricating oil is stored in the oil storage tank at all times when the compressor is running, so as to ensure the reliability of operation under extreme oil shortage conditions, effectively solve the problems of insufficient oil supply to the compressor under low temperature and high speed, low temperature starting, defrosting and other working conditions, lack of sufficient lubricating oil inside the oil supply channel of the pump body end face, and wear of the pump body due to oil shortage in the compressor, improve the lubrication effect on the inside of the pump body of the compressor, and ensure the normal operation of the compressor; further, the present invention adopts the first oil supply channel opened inside the bracket and the second oil supply channel opened on the stator plate to effectively guide the oil in the first oil storage tank to the end faces of the stator plate and the moving plate bracket, so as to ensure the effective lubrication of the end face of the pump body;

[0031] 2. The present invention also uses the structure of a second oil storage tank disposed inside the bracket, and the seventh oil tank can effectively guide the oil to the back pressure chamber to lubricate the end face of the pump body; the eighth oil tank can effectively guide the oil in the second oil storage tank to the oil pool inside the shell, so that after the oil supplied from the crankshaft oil supply hole has lubricated the bearings and the first oil storage tank is used to lubricate the end face of the pump body, the excess oil is guided back to the shell of the compressor, thereby ensuring oil recovery; and the present invention can firstly ensure the oil in the first oil storage tank by making the height of the first oil storage tank lower than the height of the second oil storage tank, so that there is always oil in the first oil storage tank, firstly ensuring the lubrication of the end face of the pump body, and secondly guiding the excess oil back to the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is an internal cross-sectional view of the oil circuit structure of the entire compressor of Example 1 of the present disclosure;

[0033] Figure 2 is a pressure distribution diagram of the entire structure of the compressor disclosed herein;

[0034] Figure 3 is an internal cross-sectional view of an oil passage portion in a bracket of a compressor disclosed herein;

[0035] Figure 4 is an internal cross-sectional view of an oil passage portion in a stator plate of a compressor of the present disclosure;

[0036] Figure 5 is an internal cross-sectional view of the oil circuit structure of the entire compressor of Embodiment 2 of the present disclosure;

[0037] Figure 6 It is an internal cross-sectional view of the entire oil circuit structure of the compressor of Example 3 of the present disclosure.

[0038] The reference numerals are:

[0039] 1. Scroll compressor; 2. Upper housing; 3. Stationary disk; 3-1. Fourth oil groove; 3-2. Fifth oil groove; 3-3. Sixth oil groove; 3-4. End face of stationary scroll disk; 4. Moving disk; 5. Cross ring; 6. Second bearing; 7. First bearing; 8. Bracket (or upper bracket); 8-1. First oil storage tank; 8-2. First oil groove; 8-3. Second oil groove; 8-4. Third oil groove; 8-5. Eighth oil groove; 8-6. Second oil storage tank; 8-7. Seven oil grooves; 9, crankshaft; 90, oil supply hole; 91, step structure; 10-1, first sealing pin; 10-2, second sealing pin; 10-3, third sealing pin; 11, throttle pin; 12, movable scroll seal strip; 13, compressor middle casing; 14, exhaust pipe; 15, intake pipe; 100, back pressure chamber; 20-1, rolling bearing outer retaining ring; 20-2, rolling bearing ball; 20-3, rolling bearing inner retaining ring; 21, rolling bearing support plate. DETAILED DESCRIPTION

[0040] like Figure 1-6 As shown, the present disclosure provides a compressor, preferably a scroll compressor, comprising:

[0041] A crankshaft 9, a pump body structure and a bracket 8, wherein an oil supply hole 90 is arranged inside the crankshaft 9, the outer circumferential wall of the crankshaft 9 and the inner circumferential wall of the bracket 8 are connected via a first bearing 7, and a first oil storage tank 8-1 is arranged inside the bracket 8 and in contact with the first bearing 7. The oil in the oil supply hole 90 can flow from the top of the crankshaft 9 along the outer circumferential wall of the crankshaft 9 and then pass through the first bearing 7 to reach the first oil storage tank 8-1. The first oil storage tank 8-1 can also transport the oil to the pump body end face of the pump body structure for lubrication.

[0042] The present invention adopts the structure of a first oil storage tank opened inside the bracket and at a position connected to the bracket bearing (first bearing), so that lubricating oil can be received from the oil supply hole of the crankshaft and the downward channel at the top, and effectively transported to the end face of the pump body, so that lubricating oil can be provided to the end face of the pump body. Since the first oil storage tank is located at the lower end of the upper bracket bearing chamber (first bearing position) and also at the lower end of the upper bracket oil return passage, lubricating oil is always stored in the oil storage tank when the compressor is running, ensuring the reliability of operation under extreme oil shortage conditions, effectively solving the problems of insufficient oil supply to the compressor under low temperature and high speed, low temperature starting, defrosting and other conditions, lack of sufficient lubricating oil inside the oil supply channel on the end face of the pump body, and wear of the pump body due to oil shortage, thereby improving the lubrication effect on the inside of the pump body of the compressor and ensuring the normal operation of the compressor.

[0043] The upper bracket oil supply structure disclosed in the present invention includes an oil storage tank and an oil supply passage, wherein the oil storage tank is located at the lower end of the upper bracket bearing chamber and also at the lower end of the upper bracket oil return passage, so that lubricating oil is stored in the oil storage tank at all times when the compressor is running, thereby ensuring uninterrupted oil supply to the pump body; the oil supply passage is divided into three sections, one of which is connected to the oil storage tank, one is connected to the vortex pump body, and one is connected to the aforementioned two sections of the oil supply passage.

[0044] A part of the lubricating oil disclosed in the present invention flows to the area where the cross ring 5 is located through the movable scroll sealing strip 12, so as to lubricate the cross ring and the end faces of the movable and stationary scrolls; a part of the lubricating oil flows to the oil storage tank of the upper bracket through the gap between the upper bracket sliding bearing (the first bearing 7) and the crankshaft 9; the oil storage tank is connected to the oil supply passage of the upper bracket, and this part of the lubricating oil is supplied to the end faces of the movable and stationary scrolls; a part of the lubricating oil flows back to the compressor through the oil return passage of the upper bracket, and enters the oil pool at the bottom of the compressor.

[0045] Figure 2 :A pressure schematic diagram of the present invention, with explanation of the figure marks: the area where the brick-shaped section line is located is the low-pressure area, in which the refrigerant is at the suction pressure, including the inside of the suction pipe and the suction cavity composed of the moving and static scrolls; the area where the grass-shaped section line is located is the medium-pressure area, in which the refrigerant pressure is greater than the suction pressure and less than the exhaust pressure, including the compression cavity composed of the moving and static scrolls, the area where the cross slip ring is located, and the static scroll oil supply passage; the area where the dot-shaped section line is located is the high-pressure area, in which the refrigerant is at the exhaust pressure, including all parts of the compressor except the low-pressure area and the medium-pressure area. The lubricating oil in the compressor, except for the oil pump supplying oil at the tail of the crankshaft, the migration of oil in other positions is achieved through pressure difference and gravity, so it is extremely important to find out the refrigerant pressure distribution inside the compressor.

[0046] In some embodiments, the first oil storage tank 8-1 extends in the radial direction inside the bracket 8 and extends to the outer peripheral wall of the first bearing 7; or, the first oil storage tank 8-1 extends in the radial direction inside the bracket 8 and extends to the bottom of the first bearing 7. This is the preferred structural form of the first oil storage tank of the present disclosure, which can achieve the effect of connecting the first oil storage tank with the first bearing, and introducing oil from the first bearing into the first oil storage tank; Example 1, as Figure 1-4 , the first oil storage tank 8-1 extends in the radial direction inside the bracket 8 and extends to the outer peripheral wall of the first bearing 7; Example 2, as Figure 5 The first oil storage groove 8 - 1 extends in the radial direction inside the bracket 8 and extends to connect with the bottom of the first bearing 7 .

[0047] In some embodiments, the pump body structure includes a static plate 3 and a dynamic plate 4, and the pump body end surface is formed at the end surface where the static plate 3 and the dynamic plate 4 meet;

[0048] The compressor also includes a first oil supply channel and a second oil supply channel, the first oil supply channel is arranged inside the bracket 8, and the second oil supply channel is arranged inside the stator 3, one end of the first oil supply channel is connected to the first oil storage tank 8-1 to absorb oil from the first oil storage tank 8-1, the other end of the first oil supply channel is connected to one end of the second oil supply channel, and the other end of the second oil supply channel can guide the oil to the end face of the pump body.

[0049] This is a further preferred structural form of the present invention. By means of the first oil supply channel arranged inside the bracket, the oil in the oil pool of the upper bracket can be effectively discharged, and then conducted to the second oil supply channel in the stator plate through the first oil supply channel, and finally conducted to the end face of the pump body, so as to effectively lubricate the end face of the pump body between the stator plate and the moving plate.

[0050] In some embodiments, the first oil supply passage includes a first oil groove 8-2, a second oil groove 8-3 and a third oil groove 8-4, the first oil groove 8-2 extends along the axial direction of the crankshaft, the third oil groove 8-4 also extends along the axial direction of the crankshaft, the second oil groove 8-3 is connected and arranged between the first oil groove 8-2 and the third oil groove 8-4, the first oil groove 8-2 can be connected with the first oil storage groove 8-1, so that the first oil storage groove 8-1, the first oil groove 8-2, the second oil groove 8-3 and the third oil groove 8-4 are connected in sequence, and the third oil groove 8-4 is connected with the second oil supply passage inside the stator 3.

[0051] This is a further preferred structural form of the first oil supply channel disclosed in the present invention. The first oil groove can absorb oil from the first oil storage tank. The second oil groove is connected to the first oil groove and effectively introduces oil from the first oil groove. The third oil groove is connected to the second oil groove to introduce oil from the second oil groove. Finally, the oil is guided to the second oil supply channel in the stator plate to complete the lubrication of the end face of the pump body.

[0052] In some embodiments, the bottom section of the first oil groove 8-2 is connected to the first oil storage groove 8-1, the first oil groove 8-2 extends axially upward to communicate with one end of the second oil groove 8-3, the other end of the second oil groove 8-3 extends obliquely upward along a direction with an inclination angle not equal to 0 with the horizontal direction to communicate with the third oil groove 8-4, and the third oil groove 8-4 extends axially upward to communicate with the second oil supply channel. This is the preferred structural form of the first oil groove, the preferred structural form of the second oil groove, and the preferred structural form of the third oil groove of the present disclosure, so that the oil moves upward from the first oil groove to the second oil groove, the oil in the second oil groove moves obliquely upward to the third oil groove, and the oil in the third oil groove moves axially upward to the second oil supply channel of the stator.

[0053] In some embodiments, a throttle pin 11 is inserted into the bottom of the third oil groove 8-4, and the throttle pin 11 is inserted into the bottom of the third oil groove 8-4 from bottom to top; and / or,

[0054] The first oil groove 8-2 is opened along the axial direction of the crankshaft to the bottom end of the bracket 8, and a first sealing pin 10-1 is also provided at the bottom end of the first oil groove 8-2;

[0055] The second oil groove 8 - 3 extends to the outer peripheral wall of the bracket 8 , and a second sealing pin 10 - 2 is also provided at the portion of the second oil groove 8 - 3 extending to the outer peripheral wall of the bracket 8 .

[0056] The present invention also inserts a throttling pin into the bottom of the third oil groove, which can effectively control and throttle the oil volume. A first sealing pin is set at the bottom end of the first oil groove to effectively seal the area. A second sealing pin is set at the radial end of the second oil groove to seal the area and prevent oil from leaking out.

[0057] In some embodiments, the second oil supply channel includes a fourth oil groove 3-1, a fifth oil groove 3-2 and a sixth oil groove 3-3, the fifth oil groove 3-2 is connected and arranged between the fourth oil groove 3-1 and the sixth oil groove 3-3, the fourth oil groove 3-1 can be connected to the first oil supply channel inside the bracket 8, and the sixth oil groove 3-3 can be connected to the end surface where the static plate 3 and the dynamic plate 4 are connected, so that the fourth oil groove 3-1, the fifth oil groove 3-2 and the sixth oil groove 3-3 are connected in sequence.

[0058] This is a further preferred structural form of the second oil supply channel disclosed in the present invention. The fourth oil groove can absorb oil from the first oil supply channel. The fifth oil groove is connected to the fourth oil groove and effectively introduces oil from the fourth oil groove. The sixth oil groove is connected to the fifth oil groove to introduce oil from the fifth oil groove, and finally the oil is guided to the end face of the pump body for lubrication.

[0059] In some embodiments, the fourth oil groove 3-1 extends along the axial direction of the crankshaft, the fifth oil groove 3-2 extends along the radial direction of the crankshaft, and the sixth oil groove 3-3 also extends along the axial direction of the crankshaft; and / or,

[0060] The fifth oil groove 3 - 2 is opened along the radial direction of the crankshaft to the outer peripheral wall of the stator plate 3 , and a third sealing pin 10 - 3 is also provided at the portion of the fifth oil groove 3 - 2 extending to the outer peripheral wall of the stator plate 3 .

[0061] This is a further preferred structural form of the fourth oil groove, the fifth oil groove and the sixth oil groove of the present invention, so that the oil moves upward from the fourth oil groove to the fifth oil groove, the oil in the fifth oil groove moves horizontally to the sixth oil groove, and the oil in the sixth oil groove moves axially downward to the end surface where the static plate and the dynamic plate meet.

[0062] In some embodiments, the outer circumferential wall of the crankshaft 9 is connected to the inner circumferential wall of the moving plate 4 through a second bearing 6. The outer circumferential wall of the crankshaft 9 located below the second bearing 6 is configured as a step structure 91. The step structure 91 and the lower end of the moving plate 4 form a second oil storage tank 8-6. The oil in the oil supply hole 90 can flow from the top of the crankshaft 9 along the outer circumferential wall of the crankshaft 9 and then pass through the second bearing 6 to reach the second oil storage tank 8-6. The second oil storage tank 8-6 can also transport the oil to the back pressure chamber 100 of the compressor and / or to the outside of the bracket 8.

[0063] The present disclosure also uses the structure of a second oil storage tank disposed inside the bracket, and the seventh oil tank can effectively guide the oil to the back pressure chamber to lubricate the end face of the pump body; the eighth oil tank can effectively guide the oil in the second oil storage tank to the oil pool inside the shell, so that after the oil supplied from the crankshaft oil supply hole is used to lubricate the bearings and the first oil storage tank is used to lubricate the end face of the pump body, the excess oil is guided back to the shell of the compressor, thereby ensuring oil recovery; and the present disclosure can first ensure the oil in the first oil storage tank by making the height of the first oil storage tank lower than the height of the second oil storage tank, so that there is always oil in the first oil storage tank, first ensuring the lubrication of the end face of the pump body, and secondly guiding the excess oil back to the shell.

[0064] In some embodiments, the back pressure chamber 100 is a groove structure opened on the upper end surface of the bracket 8, the back pressure chamber 100 is opposite to the moving plate 4 and can be connected to the compression chamber between the static plate 3 and the moving plate 4, the compressor also includes a seventh oil groove 8-7, the seventh oil groove 8-7 is formed between the inner circumferential wall of the bracket 8 and the outer circumferential wall of the moving plate 4, and one end of the seventh oil groove 8-7 can be connected to the second oil storage tank 8-6, and the other end of the seventh oil groove 8-7 can be connected to the back pressure chamber 100.

[0065] The present invention also enables the seventh oil groove to be connected with the second oil storage groove, introduces oil from the second oil storage groove into the seventh oil groove, and guides the oil into the back pressure cavity through the seventh oil groove and into between the stator plate and the movable plate, so as to lubricate the end surface between the stator plate and the movable plate.

[0066] In some embodiments, the seventh oil groove 8-7 extends along the axial direction of the crankshaft. This is the preferred structural form of the seventh oil groove of the present disclosure, that is, it extends along the axial direction of the crankshaft to introduce oil from the second oil storage tank and enter the back pressure chamber through its upper end.

[0067] In some embodiments, the compressor further includes an eighth oil groove 8-5, the eighth oil groove 8-5 is disposed inside the bracket 8, one end of the eighth oil groove 8-5 is connected to the second oil storage groove 8-6, and the other end can guide the oil to the lower part of the bracket 8. The present disclosure also enables the eighth oil groove to be connected to the second oil storage groove and effectively guide the oil to the lower part of the bracket, so that the oil in the second oil storage groove can be effectively guided to the oil pool inside the shell through the eighth oil groove, so that the excess oil supplied from the crankshaft oil supply hole is guided back to the shell of the compressor after the oil is used to lubricate the bearing and the end face of the pump body in the first oil storage groove, thereby ensuring oil recovery.

[0068] In some embodiments, the eighth oil groove 8-5 extends along the radial direction of the crankshaft. This is the preferred structural form of the eighth oil groove of the present disclosure, that is, it extends along the radial direction of the crankshaft to introduce oil from the eighth oil storage tank and introduce it into the lower part of the bracket through its radial outer end.

[0069] In some embodiments, the second oil storage tank 8-6 is located above the first oil storage tank 8-1, and the oil passes through the second oil storage tank 8-6 and then passes through the first bearing 7 to reach the first oil storage tank 8-1; and / or, the second bearing 6 is a sliding bearing. The disclosure can firstly ensure the oil in the first oil storage tank by making the height of the first oil storage tank lower than the height of the second oil storage tank, so that there is always oil in the first oil storage tank, firstly ensuring the lubrication of the end surface of the pump body, and secondly guiding the excess oil back to the housing.

[0070] In some embodiments, the first bearing 7 is a sliding bearing or a rolling bearing:

[0071] When the first bearing is a sliding bearing, oil can flow through the gap between the sliding bearing and the inner circumferential wall of the bracket 8, and / or through the gap between the sliding bearing and the outer circumferential wall of the crankshaft 9; when the first bearing is a rolling bearing, oil can flow through the gap between the ball and the retaining ring of the rolling bearing.

[0072] This is the preferred structural form of the first bearing disclosed in the present invention, which can be a sliding bearing (Examples 1-2) or a rolling bearing (Example 3), and can achieve the oil conduction function and effect.

[0073] The present disclosure also provides an air conditioner, which comprises the compressor described in any of the preceding items.

[0074] 1. The present invention forms local oil pressure between pump bodies, improves pump body clearance, forms a stable oil film, reduces pump body contact wear, and reduces friction power consumption;

[0075] 2. The friction pair of the pump body is cooled and lubricated by lubricating oil, which improves the operating reliability of the pump body and the reliability of the compressor;

[0076] 3. The upper bracket forms a separate oil storage tank, which can store a certain amount of lubricating oil, reduce the oil disturbance power consumption in the lower part of the compressor, and ensure stable oil supply to the end face of the pump body.

[0077] Embodiment 1, Figure 1 An embodiment of the present invention is shown. The pump body assembly consisting of the stator plate 3 and the moving plate 4 is supported by the bracket 8; the cross ring 5 prevents the moving scroll from rotating, and is also supported by the upper bracket; the upper bracket is fixed by the compressor housing 13; the second bearing 6 through which the crankshaft 9 passes enables the moving scroll to rotate, and the radial movement is constrained by the first bearing 7; the moving scroll sealing strip 12 is supported by the upper bracket to isolate the pressure. The refrigerant enters the pump body through the suction pipe 15, is discharged into the compressor after compression, and then flows out of the compressor through the exhaust pipe 14 and enters the refrigeration system.

[0078] Figure 1 The middle arrow indicates the flow direction of the lubricating oil: all the lubricating oil flows up through the oil hole of the crankshaft to the oil pool composed of the upper bracket and the movable scroll sliding bearing, part of the lubricating oil flows to the area where the cross slip ring is located through the movable scroll sealing strip, and lubricates the cross slip ring and the end faces 3-4 of the movable and static scrolls, part of the lubricating oil flows through the gap between the upper bracket sliding bearing and the crankshaft to the first oil storage tank 8-1, the oil storage tank is connected to the first oil tank 8-2, and this part of the lubricating oil is supplied to the end faces of the movable and static scrolls; part of the lubricating oil flows back to the compressor through the eighth oil tank 8-5 and enters the lower oil pool of the compressor.

[0079] Figure 2 The schematic diagram of the internal pressure of the compressor in the present invention is shown. The area where the brick-shaped section line is located is the low-pressure area, in which the refrigerant is at the suction pressure, including the inside of the suction pipe and the suction cavity composed of the moving and static scrolls; the area where the grass-shaped section line is located is the medium-pressure area, in which the refrigerant pressure is greater than the suction pressure and less than the exhaust pressure, including the compression cavity composed of the moving and static scrolls, the area where the cross slip ring is located, and the static scroll oil supply passage. The source of the medium pressure is the migration of the refrigerant in the compression cavity of the moving and static scrolls through the medium-pressure hole structure of the moving and static scrolls; the area where the dot-shaped section line is located is the high-pressure area, in which the refrigerant is at the exhaust pressure, including all parts of the compressor except the low-pressure area and the medium-pressure area. The refrigerant pressure in the high-pressure area is greater than the refrigerant pressure in the medium-pressure area, and the pressure difference causes the lubricating oil to migrate through the moving scroll seal strip and the upper bracket oil supply passage, thereby achieving the purpose of guiding oil through the upper bracket oil supply passage and stably lubricating the end face of the pump body in the patent.

[0080] The oil reservoir of the upper bracket is located at the lower part of the upper bracket sliding bearing, and plays the role of storing lubricating oil. The oil reservoir is connected to the first oil groove 8-2. The throttle pin 11 is located in the third oil groove 8-4, and plays the role of isolating pressure to prevent air from flowing between the second oil groove 8-3 and the third oil groove 8-4. The first sealing pin 10-1 and the second sealing pin 10-2 play a sealing role. This is because the bracket has to be opened when the oil supply passage of the upper bracket is processed. If it is not sealed, oil cannot be supplied. Among them, if the first oil groove 8-2 has other solutions to block the passage, such as Example 2 and Example 3, the first sealing pin 10-1 can be cancelled; the third oil groove 8-4 and the shell in the compressor have an interference fit, and the second sealing pin 10-2 can be cancelled. The oil reservoir of the upper bracket is lower than the oil return passage of the upper bracket to ensure that a part of the lubricating oil is already in the oil reservoir before the compressor returns oil.

[0081] The fourth oil groove 3-1 of the fixed scroll is connected to the oil supply passage 3 of the upper bracket, the sixth oil groove 3-3 of the fixed scroll is connected to the end surface 3-4 of the fixed scroll, and the fifth oil groove 3-2 of the fixed scroll serves to connect the fourth oil groove 3-1 and the sixth oil groove 3-3. The third sealing pin 10-3 is located in the fifth oil groove 3-2. If the fixed scroll is in interference connection with the compressor upper shell 2 or the compressor middle shell 3, the third sealing pin 10-3 can be eliminated.

[0082] Through the effect of pressure difference, the lubricating oil in the oil storage tank of the upper bracket is stably and continuously supplied to the end faces of the moving and stationary scroll plates, forming local oil pressure between the pump bodies, which can improve the pump body clearance, form a stable oil film, reduce pump body contact wear, and reduce friction power consumption; the pump body friction pair is cooled and lubricated by the lubricating oil, which improves the operational reliability of the pump body and the reliability of the compressor; the upper bracket forms a separate oil storage tank, which can store a certain amount of lubricating oil, reduce the oil disturbance power consumption of the lower part of the compressor, and ensure stable oil supply to the end face of the pump body.

[0083] Embodiment 2:

[0084] like Figure 5 As shown, an oil reservoir can be optionally provided at the lower end of the sliding bearing to meet the needs of the occasion, and the first sealing pin 10-1 can be eliminated.

[0085] Embodiment 3:

[0086] like Figure 6 As shown, in a vertical scroll compressor using a rolling bearing, an oil supply passage can be opened in the bearing chamber composed of the upper bracket and the rolling bearing support plate 21, and the lubricating oil flows into the oil reservoir through the gap between the ball and the retaining ring of the rolling bearing (first bearing 7), thereby achieving the purpose of oil supply. In this structure, the oil reservoir is still located below the bearing and lower than the oil return passage of the upper bracket. The upper bracket still has three oil supply passages, and the first sealing pin 10-1 can be eliminated.

[0087] The above is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure. The above is only a preferred implementation of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present disclosure, and these improvements and variations should also be regarded as the protection scope of the present disclosure.

Claims

1. A compressor, characterized in that: include: A crankshaft (9), a pump body structure and a bracket (8), wherein an oil supply hole (90) is arranged inside the crankshaft (9), an outer peripheral wall of the crankshaft (9) and an inner peripheral wall of the bracket (8) are connected via a first bearing (7), a first oil storage tank (8-1) is arranged inside the bracket (8) and in contact with the first bearing (7), the oil in the oil supply hole (90) can flow from the top of the crankshaft (9) along the outer peripheral wall of the crankshaft (9) and then through the first bearing (7) to the first oil storage tank (8-1), and the first oil storage tank (8-1) can also transport the oil to the pump body end surface of the pump body structure for lubrication; The first oil storage groove (8-1) extends along the radial direction inside the bracket (8) and extends to connect with the outer peripheral wall of the first bearing (7); or the first oil storage groove (8-1) extends along the radial direction inside the bracket (8) and extends to connect with the bottom of the first bearing (7); The pump body structure comprises a static plate (3) and a dynamic plate (4), and the pump body end surface is formed at the end surface where the static plate (3) and the dynamic plate (4) are connected; The compressor further comprises a first oil supply passage and a second oil supply passage, the first oil supply passage being arranged inside the bracket (8), the second oil supply passage being arranged inside the stator (3), one end of the first oil supply passage being connected to the first oil storage tank (8-1) so as to absorb oil from the first oil storage tank (8-1), the other end of the first oil supply passage being connected to one end of the second oil supply passage, and the other end of the second oil supply passage being capable of guiding oil to the end surface of the pump body; The first oil supply passage comprises a first oil groove (8-2), a second oil groove (8-3) and a third oil groove (8-4); the first oil groove (8-2) extends along the axial direction of the crankshaft; the third oil groove (8-4) also extends along the axial direction of the crankshaft; the second oil groove (8-3) is arranged between the first oil groove (8-2) and the third oil groove (8-4); the first oil groove (8-2) can be communicated with the first oil storage groove (8-1), so that the first oil storage groove (8-1), the first oil groove (8-2), the second oil groove (8-3) and the third oil groove (8-4) are communicated in sequence; the third oil groove (8-4) is communicated with the second oil supply passage inside the stator (3); The outer peripheral wall of the crankshaft (9) and the inner peripheral wall of the movable plate (4) are connected via a second bearing (6); the outer peripheral wall of the crankshaft (9) located below the second bearing (6) is configured as a step structure (91); the step structure (91) and the lower end of the movable plate (4) form a second oil storage tank (8-6); the oil in the oil supply hole (90) can flow from the top of the crankshaft (9) along the outer peripheral wall of the crankshaft (9) and then through the second bearing (6) to the second oil storage tank (8-6); the second oil storage tank (8-6) can also transport the oil to the back pressure chamber (100) of the compressor and / or to the outside of the bracket (8); The back pressure chamber (100) is a groove structure opened on the upper end surface of the bracket (8), the back pressure chamber (100) is opposite to the moving plate (4) and can be communicated with the compression chamber between the stationary plate (3) and the moving plate (4), the compressor also includes a seventh oil groove (8-7), the seventh oil groove (8-7) is formed between the inner peripheral wall of the bracket (8) and the outer peripheral wall of the moving plate (4), one end of the seventh oil groove (8-7) can be communicated with the second oil storage groove (8-6), and the other end of the seventh oil groove (8-7) can be communicated with the back pressure chamber (100); The seventh oil groove (8-7) extends along the axial direction of the crankshaft; The compressor further comprises an eighth oil groove (8-5), the eighth oil groove (8-5) being arranged inside the bracket (8), one end of the eighth oil groove (8-5) being connected to the second oil storage groove (8-6), and the other end of the eighth oil groove (8-5) being capable of guiding oil to the lower part of the bracket (8).

2. The compressor according to claim 1, characterized in that: The bottom section of the first oil groove (8-2) is connected to the first oil storage groove (8-1), the first oil groove (8-2) extends axially upward to be connected to one end of the second oil groove (8-3), the other end of the second oil groove (8-3) extends to be connected to the third oil groove (8-4), and the third oil groove (8-4) extends axially upward to be connected to the second oil supply channel.

3. The compressor according to claim 1, characterized in that: A throttling pin (11) is also inserted into the bottom of the third oil groove (8-4), and the throttling pin (11) is inserted into the bottom of the third oil groove (8-4) from bottom to top; and / or, The first oil groove (8-2) is opened along the axial direction of the crankshaft to the bottom end of the bracket (8), and a first sealing pin (10-1) is also provided at the bottom end of the first oil groove (8-2); The second oil groove (8-3) extends to the outer peripheral wall of the bracket (8), and a second sealing pin (10-2) is also provided at the portion of the second oil groove (8-3) extending to the outer peripheral wall of the bracket (8).

4. The compressor according to claim 1, characterized in that: The second oil supply channel comprises a fourth oil groove (3-1), a fifth oil groove (3-2) and a sixth oil groove (3-3); the fifth oil groove (3-2) is connected and arranged between the fourth oil groove (3-1) and the sixth oil groove (3-3); the fourth oil groove (3-1) can be connected to the first oil supply channel inside the bracket (8); the sixth oil groove (3-3) can be connected to the end surface where the static plate (3) and the dynamic plate (4) are connected, so that the fourth oil groove (3-1), the fifth oil groove (3-2) and the sixth oil groove (3-3) are connected in sequence.

5. The compressor according to claim 4, characterized in that: The fourth oil groove (3-1) extends in the axial direction of the crankshaft, the fifth oil groove (3-2) extends in the radial direction of the crankshaft, and the sixth oil groove (3-3) also extends in the axial direction of the crankshaft; and / or, The fifth oil groove (3-2) is opened along the radial direction of the crankshaft to the outer peripheral wall of the stator (3), and a third sealing pin (10-3) is also provided at the portion of the fifth oil groove (3-2) extending to the outer peripheral wall of the stator (3).

6. The compressor according to claim 1, characterized in that: The eighth oil groove (8-5) extends along the radial direction of the crankshaft.

7. The compressor according to claim 1, characterized in that: The second oil storage tank (8-6) is located above the first oil storage tank (8-1), and the oil passes through the second oil storage tank (8-6) and then passes through the first bearing (7) to reach the first oil storage tank (8-1); and / or the second bearing (6) is a sliding bearing.

8. The compressor according to any one of claims 1 to 7, characterized in that: The first bearing (7) is a sliding bearing or a rolling bearing: When the first bearing is a sliding bearing, oil can flow through a gap between the sliding bearing and the inner peripheral wall of the bracket (8), and / or a gap between the sliding bearing and the outer peripheral wall of the crankshaft (9); when the first bearing is a rolling bearing, oil can flow through a gap between the ball and the retaining ring of the rolling bearing.

9. An air conditioner, characterized in that: A compressor comprising the compressor described in any one of claims 1-8.

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