Scroll compressor and air conditioner having the same

Abstract

The present application provides a scroll compressor, comprising a fixed scroll and an orbiting scroll; the fixed scroll and the orbiting scroll mesh with each other to form a compression chamber; the fixed scroll is provided with an exhaust hole for discharging gas in the compression chamber; the exhaust hole comprises a first exhaust hole and a second exhaust hole; the first exhaust hole is opened and the second exhaust hole is closed for a first exhaust state; the first exhaust hole is closed and the second exhaust hole is opened for a second exhaust state; the scroll compressor has different compression ratios in the first exhaust state and the second exhaust state; the scroll compressor further comprises a switching mechanism, the switching mechanism being used to switch the scroll compressor between the first exhaust state and the second exhaust state. According to the scroll compressor of the present application and the air conditioner having the same, the internal pressure ratio of the scroll compressor matches the actual required pressure ratio of the system, thereby avoiding additional power consumption, improving the energy efficiency of the scroll compressor, and improving the energy saving effect of the air conditioning system.

Description

Technical Field

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

[0002] Currently, scroll compressors are widely used in refrigeration, air conditioning, and heat pumps due to their high efficiency, small size, light weight, and smooth operation. Generally speaking, a scroll compressor consists of a sealed casing, a stationary scroll, an orbiting scroll, a bracket, a crankshaft, an anti-rotation mechanism, and a motor. Both the orbiting and stationary scrolls have spiral profiles. The orbiting scroll is eccentric with respect to the stationary scroll and installed 180° apart, creating multiple crescent-shaped spaces between the two scrolls. As the orbiting scroll rotates around the center of the stationary scroll and rotates linearly within a certain radius without self-rotation, the outer crescent-shaped spaces continuously move toward the center. At this point, the refrigerant is gradually pushed toward the central space, its volume continuously decreasing while its pressure continuously increasing until it connects to the central exhaust port. The high-pressure refrigerant is then discharged from the pump, completing the compression process.

[0003] However, since scroll compressors operate at a constant pressure ratio (i.e., the internal pressure ratio is a fixed value), the evaporating and condensing pressures fluctuate with ambient temperature during air conditioner operation, meaning the external pressure ratio is a variable value. When the internal pressure ratio equals the external pressure ratio, the scroll compressor is optimally matched to system requirements, with no additional power loss. When the internal pressure ratio exceeds the external pressure ratio, the scroll compressor experiences overcompression, leading to isochoric expansion of the high-pressure gas at the exhaust port and incurring additional power loss. When the internal pressure ratio is less than the external pressure ratio, the scroll compressor experiences undercompression, leading to isochoric compression of the high-pressure gas at the exhaust port and incurring additional power loss.

[0004] Therefore, how to provide a scroll compressor and an air conditioner with the same that can match the internal pressure ratio of the scroll compressor with the actual pressure ratio required by the system, avoid additional power consumption, improve the energy efficiency of the scroll compressor, and improve the energy saving effect of the air-conditioning system has become a problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0005] Therefore, the technical problem to be solved by this application is to provide a scroll compressor and an air conditioner having the same, so that the internal pressure ratio of the scroll compressor matches the actual pressure ratio required by the system, avoiding additional power consumption, improving the energy efficiency of the scroll compressor, and improving the energy-saving effect of the air-conditioning system.

[0006] To solve the above problems, the present application provides a scroll compressor, which includes a stationary scroll and a moving scroll; the stationary scroll and the moving scroll mesh with each other to form a compression chamber; an exhaust hole for discharging the gas in the compression chamber is provided on the stationary scroll; the exhaust hole includes a first exhaust hole and a second exhaust hole; the first exhaust state is that the first exhaust hole is open and the second exhaust hole is closed; the second exhaust state is that the first exhaust hole is closed and the second exhaust hole is open; the compression ratios of the scroll compressor in the first exhaust state and the second exhaust state are different; the scroll compressor further includes a switching mechanism, and the switching mechanism is used to switch the scroll compressor between the first exhaust state and the second exhaust state.

[0007] Preferably, the stationary scroll includes a stationary scroll end portion and a stationary scroll spiral provided on the stationary scroll end portion; the distance between the first exhaust hole and the central axis of the moving scroll is d1; the distance between the second exhaust hole and the central axis of the moving scroll is d2; where d1≠d2;

[0008] And / or; the compression ratio of the scroll compressor in the first exhaust state is ε1; the compression ratio of the scroll compressor in the second exhaust state is ε2; where ε1:ε2 = 1:0.76 - 0.84;

[0009] And / or, the cross-section of the first exhaust hole is a first circular surface, the diameter of the first circular surface is d3; the cross-sectional area of the second exhaust hole is a second circular surface, the diameter of the second circular surface is d4; the thickness of the stationary scroll spiral is d5; the pitch of the spiral curve of the stationary scroll spiral is d6; where d5 < d3 < d6; d5 < d4 < d6; and / or, d3≠d4.

[0010] Preferably, an installation cavity is provided on the stationary scroll end portion; the installation cavity communicates with the first exhaust hole and the second exhaust hole; the switching valve includes a valve core; the valve core is arranged in the installation cavity; the first position is that the valve core blocks the first exhaust hole and opens the second exhaust hole; the second position is that the valve core blocks the second exhaust hole and opens the first exhaust hole; the valve core is movable between the first position and the second position.

[0011] Preferably, the valve core divides the installation cavity into a first force application chamber and a second force application chamber; a first force application member is arranged in the first force application chamber; a second force application member is arranged in the second force application chamber; the first force application member is used to provide a first acting force to the valve core; the second force application member is used to provide a second acting force to the valve core; the valve core slides under the action of the first acting force and the second acting force.

[0012] Preferably, the first force application member is an elastic member; the elastic member is arranged between the valve core and the inner wall of the first force application chamber;

[0013] And / or, a sliding seal structure is formed between the valve core and the second force application chamber;

[0014] And / or, the directions of the first acting force and the second acting force are opposite;

[0015] And / or, a pressure hole is opened on the static scroll, and the pressure hole is connected to the second force application chamber; the pressure hole is used to guide the fluid into the second force application chamber to provide a second force on the valve core.

[0016] Preferably, the distance between the first exhaust hole and the second force-applying chamber is S1; the distance between the second exhaust hole and the second force-applying chamber is S2; wherein S1 <S2。

[0017] Preferably, the installation cavity is arranged in the end of the stator disk, and the installation cavity divides the first exhaust hole into a first part and a second part; the installation cavity divides the second exhaust hole into a third part and a fourth part; the first part, the second part, the third part and the fourth part are all connected to the installation cavity.

[0018] Preferably, a connecting channel is provided on the valve core; when the scroll compressor is in the first exhaust state, the valve core blocks the third part and the fourth part, and the connecting channel connects the first part and the second part; when the scroll compressor is in the second exhaust state, the valve core blocks the first part and the second part; the connecting channel connects the third part and the fourth part.

[0019] According to another aspect of the present application, an air conditioner is provided, comprising a scroll compressor, wherein the scroll compressor is the scroll compressor described above.

[0020] Preferably, the air conditioner also includes a first heat exchanger, a throttling element and a second heat exchanger. The scroll compressor, the first heat exchanger, the first heat exchanger and the throttling element and the second heat exchanger are connected through pipelines to form a refrigerant circulation system; when a pressure hole is provided on the static scroll disk, the first heat exchanger is connected to the pressure hole.

[0021] Preferably, when the external pressure ratio of the air conditioner is greater than the compression ratio of the scroll compressor, the scroll compressor switches to the one with the larger compression ratio between the first exhaust state and the second exhaust state; when the external pressure ratio of the air conditioner is less than the compression ratio of the scroll compressor, the scroll compressor switches to the one with the smaller compression ratio between the first exhaust state and the second exhaust state.

[0022] The scroll compressor and the air conditioner equipped with the same provided by the present application have different compression ratios in the first exhaust state and the second exhaust state; the scroll compressor is switched between the first exhaust state and the second exhaust state, so that the internal pressure ratio of the scroll compressor matches the actual required pressure ratio of the system, avoiding additional power consumption, improving the energy efficiency of the scroll compressor, and improving the energy saving effect of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a scroll compressor according to an embodiment of the present application;

[0024] Figure 2 This is a schematic structural diagram of the static vortex in an embodiment of the present application;

[0025] Figure 3 This is a schematic structural diagram of a switching mechanism according to an embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of the installation structure of the static scroll and the switching mechanism according to an embodiment of the present application;

[0027] Figure 5 This is a schematic diagram of the installation structure of the static scroll and the switching mechanism according to an embodiment of the present application;

[0028] Figure 6 This is a flow chart of the air conditioner according to an embodiment of the present application.

[0029] The reference numerals indicate:

[0030] 1. Stationary scroll; 2. Orbital scroll; 31. First exhaust hole; 311. First part; 312. Second part; 32. Second exhaust hole; 321. Third part; 322. Fourth part; 4. Switching mechanism; 41. Valve core; 42. Connecting channel; 43. Elastic member; 5. Mounting cavity; 51. First force chamber; 52. Second force chamber; 53. Pressure hole; 61. Scroll compressor; 62. Four-way valve; 63. First heat exchanger; 64. Throttling device; 65. Second heat exchanger; 66. Pressure pipe. DETAILED DESCRIPTION

[0031] See also Figure 1 As shown, according to an embodiment of the present application, a scroll compressor includes a fixed scroll 1 and a movable scroll 2; the fixed scroll 1 and the movable scroll 2 are meshed with each other to form a compression chamber; an exhaust hole for discharging gas in the compression chamber is provided on the fixed scroll 1; the exhaust hole includes a first exhaust hole 31 and a second exhaust hole 32; the first exhaust hole 31 is opened and the second exhaust hole 32 is closed as the first exhaust state; the first exhaust hole 31 is closed and the second exhaust hole 32 is opened as the second exhaust state; the scroll compressor 61 has different compression ratios in the first exhaust state and the second exhaust state; the scroll compressor 61 also includes a switching mechanism 4, which is used to make the scroll compressor 61 have different compression ratios in the first exhaust state and the second exhaust state; 1 switches between the first exhaust state and the second exhaust state; the compression ratio of the scroll compressor is different in the first exhaust state and the second exhaust state; the scroll compressor is switched between the first exhaust state and the second exhaust state, so that the internal pressure ratio of the scroll compressor 61 matches the actual required pressure ratio of the system, avoiding additional power consumption, improving the energy efficiency of the scroll compressor, and improving the energy saving effect of the air-conditioning system; and in this application, no auxiliary exhaust hole is used, and there is no useless clearance volume of the auxiliary exhaust hole, which improves the working efficiency of the compressor pump body and improves the energy efficiency of the whole machine; there is no need to use a pump body pressure relief valve and an exhaust valve, which can improve the low noise vibration effect of the compressor and improve the reliability level.

[0032] Further, the stationary scroll plate 1 includes a stationary plate end portion and a stationary plate scroll provided on the stationary plate end portion; the distance between the first exhaust hole 31 and the central axis of the moving scroll plate 2 is d1; the distance between the second exhaust hole 32 and the central axis of the moving scroll plate 2 is d2; where d1≠d2;

[0033] and / or; the compression ratio of the scroll compressor 61 in the first exhaust state is ε1; the compression ratio of the scroll compressor 61 in the second exhaust state is ε2; where ε1:ε2 = 1:0.76 - 0.84;

[0034] and / or, the cross-section of the first exhaust hole 31 is a first circular surface, and the diameter of the first circular surface is d3; the cross-sectional area of the second exhaust hole 32 is a second circular surface, and the diameter of the second circular surface is d4; the thickness of the stationary plate scroll is d5; the pitch of the scroll profile of the stationary plate scroll is d6; where d5 < d3 < d6; d5 < d4 < d6; and / or, d3≠d4. Different positions of the first exhaust hole 31 and the second exhaust hole 32, or different pore sizes of the first exhaust hole 31 and the second exhaust hole 32 can make the compression ratios corresponding to the first exhaust hole 31 and the second exhaust hole 32 different. The control structure adjusts the opening or closing of different exhaust holes: when the internal pressure ratio > the external pressure ratio condition, the control structure moves to communicate with the exhaust hole with a smaller pressure ratio; when the internal pressure ratio < the external pressure ratio condition, the control structure moves to communicate with the exhaust hole with a larger pressure ratio, realizing different pressure ratio outputs of the compressor 61. The external pressure ratio is the ratio of the pressure at the suction port to the pressure at the exhaust port of the compressor.

[0035] Combined with reference to Figure 2 As shown, the present application also discloses some embodiments. An installation cavity 5 is provided on the stationary plate end portion; the installation cavity 5 communicates with the first exhaust hole 31 and the second exhaust hole 32; the switching valve includes a valve core 41; the valve core 41 is arranged in the installation cavity 5; taking the valve core 41 blocking the first exhaust hole 31 and opening the second exhaust hole 32 as the first position; taking the valve core 41 blocking the second exhaust hole 32 and opening the first exhaust hole 31 as the second position; the valve core 41 is movable between the first position and the second position.

[0036] Combined with reference to Figure 3-5 As shown, the present application also discloses some embodiments. The valve core 41 divides the installation cavity 5 into a first force application chamber 51 and a second force application chamber 52; a first force application member is arranged in the first force application chamber 51; a second force application member is arranged in the second force application chamber 52; the first force application member is used to provide a first acting force to the valve core 41; the second force application member is used to provide a second acting force to the valve core 41; the valve core 41 slides under the action of the first acting force and the second acting force.

[0037] Further, the first force application member is an elastic member 43; the elastic member 43 is arranged between the valve core 41 and the inner wall of the first force application chamber 51;

[0038] And / or, the valve core 41 and the second force application chamber 52 form a sliding sealing structure;

[0039] and / or, the first force is in opposite directions to the second force;

[0040] And / or, a pressure hole 53 is opened on the static scroll 1, and the pressure hole 53 is connected to the second force application chamber 52; the pressure hole 53 is used to guide the fluid into the second force application chamber 52 to provide a second force on the valve core 41.

[0041] Furthermore, the distance between the first exhaust hole 31 and the second force-applying chamber 52 is S1; the distance between the second exhaust hole 32 and the second force-applying chamber 52 is S2; wherein S1 <S2。

[0042] Furthermore, the installation cavity 5 is arranged in the end of the static disk, and the installation cavity 5 divides the first exhaust hole 31 into a first part 311 and a second part 312; the installation cavity 5 divides the second exhaust hole 32 into a third part 321 and a fourth part 322; the first part 311, the second part 312, the third part 321 and the fourth part 322 are all connected to the installation cavity 5.

[0043] Furthermore, a connecting passage 42 is provided on the valve core 41; when the scroll compressor 61 is in the first exhaust state, the valve core 41 blocks the third part 321 and the fourth part 322, and the connecting passage 42 connects the first part 311 and the second part 312; when the scroll compressor 61 is in the second exhaust state, the valve core 41 blocks the first part 311 and the second part 312; the connecting passage 42 connects the third part 321 and the fourth part 322, and when the flow pressure in the second force application chamber 52 is less than the elastic force of the elastic member 43, the valve core 41 moves to block the first exhaust hole 31, and the second exhaust hole 32 is connected to the connecting passage 42, thereby avoiding under-compression of the scroll compressor 61 and eliminating the additional power consumption caused by isochoric compression of the high-pressure gas at the exhaust port; when the flow pressure in the second force application chamber 52 is greater than the elastic force of the elastic member 43, the valve core 41 moves to block the second exhaust hole 32, and the first exhaust hole 31 is connected to the connecting passage 42, thereby avoiding over-compression of the compressor 61 and eliminating the additional power consumption caused by isochoric expansion of the high-pressure gas at the exhaust port.

[0044] The scroll compressor 61 houses a compression mechanism and a drive unit within a sealed container. The compression mechanism consists of a fixed scroll assembly, an orbiting scroll, and a cross-slip ring for the anti-rotation mechanism. The drive unit primarily comprises a motor and a crankshaft. During operation, the drive unit drives the orbiting scroll, which meshes with the fixed scroll to form a crescent-shaped compression chamber. As the crankshaft rotates, refrigerant enters the compressor's compression mechanism's suction chamber through the intake pipe. The orbiting scroll continues to rotate and translate, maintaining a well-engaged state. The suction chamber continuously moves toward the center, its volume continuously decreasing, and the pressure within the chamber is continuously compressed. When compression reaches the predetermined compression ratio, the refrigerant is discharged through the exhaust port of the fixed scroll, entering the upper space of the sealed container. It then flows through the exhaust passage between the fixed scroll and the upper bracket into the upper space of the motor and the lower space of the sealed container, cooling the motor, before being discharged from the compressor through the exhaust pipe.

[0045] See also Figure 6 As shown, according to an embodiment of the present application, an air conditioner includes a scroll compressor 61 , and the scroll compressor 61 is the scroll compressor 61 described above.

[0046] Furthermore, the air conditioner also includes a first heat exchanger 63, a throttling element 64 and a second heat exchanger 65. The scroll compressor 61, the first heat exchanger 63, the first heat exchanger 63 and the throttling element 64 and the second heat exchanger 65 are connected through pipelines to form a refrigerant circulation system; when a pressure hole 53 is provided on the static scroll 1, the first heat exchanger 63 is connected to the pressure hole 53.

[0047] Furthermore, the first heat exchanger 63 is connected to the pressure hole 53 through a pressure pipe 66 .

[0048] Furthermore, when the external pressure ratio of the air conditioner is greater than the compression ratio of the scroll compressor 61, the scroll compressor 61 switches to the one with the larger compression ratio between the first exhaust state and the second exhaust state; when the external pressure ratio of the air conditioner is less than the compression ratio of the scroll compressor 61, the scroll compressor 61 switches to the one with the smaller compression ratio between the first exhaust state and the second exhaust state, thereby realizing different pressure ratio outputs of the scroll compressor 61, achieving matching of the compression internal pressure ratio with the actual required pressure ratio of the system, avoiding additional power consumption, improving the energy efficiency of the scroll compressor 61, and improving the energy saving effect of the air-conditioning system.

[0049] Furthermore, the air conditioner further includes a four-way valve 62 and a gas-liquid separator.

[0050] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0051] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A scroll compressor comprising a fixed scroll (1) and a movable scroll (2); the fixed scroll (1) and the movable scroll (2) mesh with each other to form a compression chamber; the fixed scroll (1) is provided with an exhaust hole for discharging gas in the compression chamber; characterized in that: The exhaust hole comprises a first exhaust hole (31) and a second exhaust hole (32); the first exhaust hole (31) is opened and the second exhaust hole (32) is closed as a first exhaust state; the first exhaust hole (31) is closed and the second exhaust hole (32) is opened as a second exhaust state; the scroll compressor (61) has different compression ratios in the first exhaust state and the second exhaust state; the scroll compressor (61) further comprises a switching mechanism (4), the switching mechanism (4) being used to switch the scroll compressor (61) between the first exhaust state and the second exhaust state. The static scroll (1) is provided with a mounting cavity (5) at the end thereof; the mounting cavity (5) is connected to the first exhaust hole (31) and the second exhaust hole (32); the switching mechanism (4) comprises a valve core (41); the valve core (41) is provided in the mounting cavity (5); the first exhaust hole (31) is blocked by the valve core (41) and the second exhaust hole (32) is opened as a first position; the second exhaust hole (32) is blocked by the valve core (41) and the first exhaust hole (31) is opened as a second position; the valve core (41) is in the The valve core (41) is movable between the first position and the second position; the valve core (41) divides the installation cavity (5) into a first force-applying chamber (51) and a second force-applying chamber (52); a first force-applying member is provided in the first force-applying chamber (51); a second force-applying member is provided in the second force-applying chamber (52); the first force-applying member is used to provide a first force to the valve core (41); the second force-applying member is used to provide a second force to the valve core (41); the valve core (41) slides under the action of the first force and the second force; the first force-applying member The component is an elastic component (43); the elastic component (43) is arranged between the valve core (41) and the inner wall of the first force-applying chamber (51); a pressure hole (53) is provided on the static vortex (1), and the pressure hole (53) is connected to the second force-applying chamber (52); the pressure hole (53) is used to guide the fluid into the second force-applying chamber (52) to provide a second force on the valve core (41); when the pressure hole (53) is provided on the static vortex (1), the pressure hole (53) is connected to the first heat exchanger (63) of the air conditioner.

2. The scroll compressor according to claim 1, wherein: The static scroll (1) comprises a static scroll end and a static scroll roll provided on the static scroll end; the distance between the first exhaust hole (31) and the central axis of the movable scroll (2) is d1; the distance between the second exhaust hole (32) and the central axis of the movable scroll (2) is d2; wherein d1≠d2; and / or; the compression ratio of the scroll compressor (61) in the first exhaust state is ε1; the compression ratio of the scroll compressor (61) in the second exhaust state is ε2; wherein ε1:ε2=1:0.76~0.84; And / or, the cross-section of the first exhaust hole (31) is a first circular surface, and the diameter of the first circular surface is d3; the cross-section of the second exhaust hole (32) is a second circular surface, and the diameter of the second circular surface is d4; the thickness of the scroll of the stationary scroll is d5; the pitch of the spiral curve of the stationary scroll is d6; where d5 < d3 < d6; d5 < d4 < d6; and / or, d3 ≠ d4.

3. The scroll compressor according to claim 1, wherein The valve core (41) and the second force application chamber (52) form a sliding seal structure; And / or, the directions of the first acting force and the second acting force are opposite.

4. The scroll compressor according to claim 3, characterized in that: The distance between the first exhaust hole (31) and the second force application chamber (52) is S1; the distance between the second exhaust hole (32) and the second force application chamber (52) is S2; where S1 < S2.

5. The scroll compressor according to claim 2, wherein: The installation cavity (5) is arranged inside the end of the stationary scroll, and the installation cavity (5) divides the first exhaust hole (31) into a first part (311) and a second part (312); the installation cavity (5) divides the second exhaust hole (32) into a third part (321) and a fourth part (322); the first part (311), the second part (312), the third part (321) and the fourth part (322) are all communicated with the installation cavity (5).

6. The scroll compressor according to claim 5, characterized in that: A communication channel (42) is arranged on the valve core (41); when the scroll compressor (61) is in the first exhaust state, the valve core (41) blocks the third part (321) and the fourth part (322), and the communication channel (42) communicates the first part (311) and the second part (312); when the scroll compressor (61) is in the second exhaust state, the valve core (41) blocks the first part (311) and the second part (312); the communication channel (42) communicates the third part (321) and the fourth part (322).

7. An air conditioner comprising a scroll compressor, characterized in that: The scroll compressor (61) is the scroll compressor (61) according to any one of claims 1-6; When the external pressure ratio of the air conditioner is greater than the compression ratio of the scroll compressor (61); the scroll compressor (61) switches to the one with the larger compression ratio in the first exhaust state and the second exhaust state; when the external pressure ratio of the air conditioner is less than the compression ratio of the scroll compressor (61); the scroll compressor (61) switches to the one with the smaller compression ratio in the first exhaust state and the second exhaust state.

8. The air conditioner according to claim 7, characterized in that: The air conditioner further includes a first heat exchanger (63), a throttling element (64) and a second heat exchanger (65), and the scroll compressor (61), the first heat exchanger (63), the throttling element (64) and the second heat exchanger (65) are connected by pipelines to form a refrigerant circulation system.

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