Compressor and air conditioner

Abstract

The present invention provides a compressor and an air conditioner, wherein the compressor comprises: a fixed scroll disk, an exhaust port is arranged on the fixed scroll disk, and at least two groups of pressure relief holes that can be connected to the internal compression chamber of the fixed scroll disk are also arranged at the bottom of the scroll of the fixed scroll disk, the at least two groups of pressure relief holes are distributed at different circumferential positions around the exhaust port, and each group of pressure relief holes includes at least one pressure relief hole, and a pressure relief valve assembly is arranged at the pressure relief hole, and when the pressure relief hole is connected to the compression chamber and when the pressure in the pressure relief hole is greater than the preset pressure relief pressure, the pressure relief valve assembly opens to relieve the pressure in the compression chamber. According to the present invention, in the over-compression working condition, the flow area of ​​the unloading channel can be effectively increased by the additional pressure relief holes, and the power consumption loss of additional pressure relief and exhaust can be avoided. Since the pressure relief holes are partially opened and partially closed, the useless clearance volume in the pump body can be effectively reduced, the working volume efficiency of the compressor pump body can be improved, and the energy efficiency of the whole machine can be improved.

Description

Technical Field

[0001] The present invention 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, low noise and vibration, 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 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 without self-rotation at a certain rotation eccentric radius, 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] Since the scroll compressor pump compressor is a constant pressure ratio compressor, that is, the internal pressure ratio is a fixed value and does not change with the working conditions, but the evaporation pressure and condensing pressure change with the working environment temperature when the air conditioner is running, that is, the external pressure ratio is a floating value. When the internal and external pressure ratios are the same, the compressor and system requirements reach the best matching state, and no additional power consumption loss will be generated; when the internal pressure ratio is greater than the external pressure ratio, the compressor will be over-compressed, and the high-pressure gas at the exhaust port will expand at the same volume, which will generate additional power loss. At the same time, over-compression will cause the motor load to increase abnormally instantly, resulting in high current breakdown of the enameled wire, abnormal burning of the motor, and reliability issues such as increased force on the scroll disk leading to fragmentation.

[0004] Prior art: Patent No. CN201420362040.6 discloses a pressure relief valve structure provided on a stationary scroll disk. The pressure relief valve device is a tongue-shaped spring structure, one end of which is fixed to the stationary scroll disk by bolts, and the other end covers the pressure relief discharge hole. This structure ensures the safe operation of the compressor, prevents the compressor motor from burning, the dynamic and static disks from breaking, and the stable operation of the air-conditioning system components;

[0005] In the existing technical solutions, most of them adopt a circular pressure relief hole structure, but there are the following problems:

[0006] As the compressor displacement increases, the pressure relief channel of a single pressure relief hole is too small, the over-compressed gas in the compression chamber cannot be discharged in time, the exhaust resistance increases, the exhaust loss increases sharply, and the power consumption of the compressor increases;

[0007] However, if multiple auxiliary exhaust holes are used, the ineffective clearance volume of the pump body will increase, which will occupy the effective compression volume of the pump body and cause the performance of the compressor to decline.

[0008] When the pressure relief valve is working, the valve plate will generate airflow noise and slapping vibration as the pressure inside the compression chamber is released. In addition, there is a risk of the valve plate breaking and the reliability is low.

[0009] Since the scroll compressor in the prior art either has over-compressed gas in the compression chamber that cannot be discharged in time during exhaust, the exhaust resistance increases, the exhaust loss increases sharply, and the power consumption of the compressor increases; or the ineffective clearance volume of the pump body increases, which occupies the effective compression volume of the pump body, resulting in a decrease in the performance of the compressor; and the pressure relief valve plate has problems of airflow noise and slapping vibration noise, and there are also technical problems such as the risk of breakage. Therefore, the present invention studies and designs a compressor and an air conditioner. Summary of the invention

[0010] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the compressors in the prior art that either the exhaust resistance is large or the invalid clearance volume is large during exhaust, thereby providing a compressor and an air conditioner.

[0011] In order to solve the above problems, the present invention provides a compressor, comprising:

[0012] A stationary scroll disk, wherein an exhaust port is arranged on the stationary scroll disk, and at least two groups of pressure relief holes capable of communicating with an internal compression chamber of the stationary scroll disk are also arranged at the scroll bottom of the stationary scroll disk, wherein at least the two groups of pressure relief holes are distributed at different circumferential positions around the exhaust port, and each group of the pressure relief holes includes at least one pressure relief hole, and a pressure relief valve assembly is arranged at the pressure relief hole, and when the pressure relief hole is connected with the compression chamber and when the pressure in the pressure relief hole is greater than a preset pressure relief pressure, the pressure relief valve assembly opens to relieve the pressure in the compression chamber.

[0013] Preferably, when the compressor is in operation and the movable scroll of the compressor rotates to a specific position, among the multiple groups of pressure relief holes: parts of the compression chamber connected to some of the pressure relief holes are in a relatively high-pressure condition, so that the parts of the pressure relief holes are opened to relieve pressure, and parts of the compression chamber connected to other parts of the pressure relief holes are in a relatively low-pressure condition, so that the parts of the pressure relief holes are closed and do not relieve pressure.

[0014] Preferably, the pressure relief holes are provided in four groups, and each group of the pressure relief holes includes four pressure relief holes.

[0015] Preferably, the pressure relief hole includes at least two curved segments, and the center of the curvature radius of each point in the two relatively long curved segments is aligned with the center of the base circle corresponding to the involute of the spiral tooth of the fixed scroll plate. R Located on the same side of the pressure relief hole.

[0016] Preferably, the center of the curvature radius corresponding to each point of the curve in the two relatively long curve segments falls within the annular distribution area, and the upper and lower limits of the annular area satisfy the following relationship:

[0017]

[0018] Where R is the distance from the center of the radius of curvature to the center of the base circle O R The distance between b is the base circle radius of the vortex involute, α is the vortex involute occurrence angle, The starting angle of the spiral involute, Final span angle of the spiral involute.

[0019] Preferably, it further comprises a pressure relief channel, one end of which is connected to the pressure relief hole and the other end of which is connected to the outside of the fixed scroll plate, and the pressure relief valve assembly is arranged inside the pressure relief channel.

[0020] Preferably, the pressure relief valve assembly includes a plunger valve body and an elastic component, the plunger valve body can move in the pressure relief channel, one end of the plunger valve body is opposite to the pressure relief hole, can move to connect with the pressure relief hole to close the gas flow, and can also move to be separated from the pressure relief hole to open the gas flow channel, the other end of the plunger valve body is connected to one end of the elastic component, and the other end of the elastic component is connected to the end of the fixed scroll plate.

[0021] Preferably, when the pressure relief hole is connected to the compression chamber and when the pressure in the compression chamber is greater than the exhaust pressure + the elastic force of the elastic component, the plunger valve body moves to open the pressure relief hole, and the gas in the compression chamber is discharged from the static scroll plate through the pressure relief hole and the pressure relief channel to be relieved, wherein the pressure in the compression chamber = the pressure in the pressure relief hole, and the preset pressure relief pressure = the exhaust pressure + the elastic force of the elastic component.

[0022] Preferably, when the pressure relief hole is not connected with the compression chamber, or when the pressure relief hole is connected with the compression chamber and the pressure in the compression chamber is less than the exhaust pressure + the elastic force of the elastic component, the plunger valve body closes the pressure relief hole, wherein the pressure in the compression chamber = the pressure in the pressure relief hole, and the preset pressure relief pressure = the exhaust pressure + the elastic force of the elastic component.

[0023] The present invention also provides an air conditioner, comprising the compressor as described in any of the preceding items.

[0024] The compressor and air conditioner provided by the present invention have the following beneficial effects:

[0025] The present invention provides more than two groups of pressure relief holes at the scroll bottom of the static scroll of the existing compressor (especially the scroll compressor), and the more than two groups of pressure relief holes are located at different circumferential positions around the exhaust port, so that when the movable scroll moves to different positions, one or more of the pressure relief holes are automatically controlled by the pressure relief valve assembly to open the pressure relief holes for pressure relief because the pressure in the connected compression chamber is greater than the preset pressure relief pressure, and one or more of the pressure relief holes are controlled by the pressure relief valve assembly to close the pressure relief holes and cannot relieve pressure because the pressure in the connected compression chamber is less than the preset pressure relief pressure, thereby achieving that in the over-compression working condition, the flow area of ​​the unloading channel is effectively increased by the additional pressure relief holes, avoiding additional pressure relief exhaust. The power consumption loss is improved, the energy efficiency of the compressor is improved, and the energy saving effect of the air-conditioning system is improved; and the unique structure of the present invention automatically and selectively opens the corresponding pressure relief holes for pressure relief instead of opening all of them, which can also effectively reduce the useless clearance volume in the pump body, improve the working volume efficiency of the compressor pump body, and improve the energy efficiency of the whole machine; the structure of the present invention uses the plunger valve body and elastic components arranged in the pressure relief channel inside the static scroll plate, and uses the plunger valve body to fill the useless space in the unloading circulation channel, which can further effectively reduce the clearance volume caused by the unloading channel, and at the same time effectively avoid the structure of setting the exhaust valve plate on the outer end surface of the static scroll plate, effectively reduce the airflow noise and slapping vibration of the compressor, and improve the reliability level. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a cross-sectional view of a scroll compressor of the present invention;

[0027] Figure 2 It is a schematic diagram of the location of the pressure relief hole of the present invention;

[0028] Figure 3 It is a schematic diagram of the limited range of the pressure relief hole structure and the center distribution area of ​​the pressure relief hole curvature of the present invention;

[0029] Figure 4 It is a schematic diagram of the stationary scroll exhaust hole, the pressure relief hole and the communication channel inside the shell of the present invention;

[0030] Figure 5 is a schematic diagram of the pressure control mechanism of the present invention when the pressure relief hole is in a closed state;

[0031] Figure 6 It is a schematic diagram of the pressure control mechanism of the present invention when the pressure relief hole is in an open state.

[0032] The reference numerals are:

[0033] 1. Scroll compressor; 100. Compression chamber; 2. Compression mechanism; 3. Driving part; 4. Motor; 5. Stationary scroll; 50. Pressure relief valve assembly; 5-1. Pressure relief hole; 5-2. Plunger valve body; 5-3. Pressure relief channel; 5-4. Elastic component; 5-5. Exhaust port; 6. Moving scroll; 7. Cross slip ring; 8. Upper bracket; 9. Back pressure seal; 10. Intake pipe; 11. Closed container upper cover; 12. Sliding bearing; 13. Crankshaft; 14. Main bearing; 15. Exhaust pipe; 16. Main balance block; 17. Rotor; 18. Stator; 19. Auxiliary balance block; 20. Auxiliary bearing cover plate; 21. Lower bracket; 22. Auxiliary bearing; 23. Thrust plate; 24. Oil suction pipe; 25. Oil guide plate; 26. Mounting plate; 27. Closed container lower cover; 27. Closed container shell. DETAILED DESCRIPTION

[0034] like Figure 1-6 As shown, the present invention provides a compressor (preferably a scroll compressor), comprising:

[0035] A static scroll plate 5, wherein an exhaust port 5-5 is provided on the static scroll plate 5, and at least two groups of pressure relief holes 5-1 which can be connected with the internal compression chamber of the static scroll plate 5 are also provided at the bottom of the scroll of the static scroll plate 5, at least the two groups of pressure relief holes 5-1 are distributed at different circumferential positions around the exhaust port 5-5, and each group of the pressure relief holes 5-1 includes at least one pressure relief hole 5-1, and a pressure relief valve assembly 50 is provided at the pressure relief hole 5-1, and when the pressure relief hole 5-1 is connected with the compression chamber and when the pressure in the pressure relief hole 5-1 is greater than the preset pressure relief pressure, the pressure relief valve assembly 50 opens to relieve the pressure of the compression chamber 100.

[0036] The present invention provides more than two groups of pressure relief holes at the bottom of the scroll of the static scroll of the existing compressor (especially the scroll compressor), and the more than two groups of pressure relief holes are located at different circumferential positions around the exhaust port. When the movable scroll moves to different positions, one or more of the pressure relief holes are automatically controlled by the pressure relief valve assembly to open the pressure relief holes for pressure relief because the pressure in the connected compression chamber is greater than the preset pressure relief pressure, and one or more of the pressure relief holes are controlled by the pressure relief valve assembly to close the pressure relief holes and cannot relieve pressure because the pressure in the connected compression chamber is less than the preset pressure relief pressure. Therefore, in the over-compression condition, the flow area of ​​the unloading channel is effectively increased by the additional pressure relief holes, the power consumption loss of additional pressure relief and exhaust is avoided, the energy efficiency of the compressor is improved, and the energy saving effect of the air-conditioning system is improved. The unique structure of the present invention automatically and selectively opens the corresponding pressure relief holes for pressure relief instead of opening all of them, which can also effectively reduce the useless clearance volume in the pump body, improve the working volume efficiency of the compressor pump body, and improve the energy efficiency of the whole machine.

[0037] like Figure 1As shown, the scroll compressor 1 contains a compression mechanism 2 and a driving part 3 in a sealed container. The compression mechanism 2 is composed of a fixed scroll 5, a movable scroll 6, and a cross slip ring 7 of an anti-rotation mechanism, and the driving part 3 is mainly composed of a motor 4 and a crankshaft 13. During the operation of the scroll compressor, the driving part 3 drives the movable scroll 6 to rotate and translate, and then meshes with the fixed scroll 5 to form a crescent-shaped compression chamber. As the crankshaft 13 rotates, the refrigerant enters the suction chamber of the compression mechanism 2 of the compressor through the suction pipe 10, the movable scroll 6 continues to rotate and translate and always maintains a good meshing state, the suction chamber continuously moves toward the center, the volume continuously shrinks, and the pressure in the chamber is continuously compressed; when the compression ends and reaches a predetermined compression ratio, the refrigerant is discharged from the exhaust port 5-5 of the fixed scroll 5, enters the upper space of the sealed container, enters the upper space of the motor 4 and the lower space of the sealed container through the exhaust channel of the fixed scroll 5 and the upper bracket 8, cools the motor 4, and then is discharged from the scroll compressor 1 through the exhaust pipe 15 and enters the two devices (condenser or evaporator) of the air conditioner.

[0038] Preferably, when the compressor is in operation and the movable scroll of the compressor rotates to a specific position, among the multiple groups of pressure relief holes 5-1: the portion of the compression chamber connected to some of the pressure relief holes 5-1 is in a relatively high-pressure condition, so that the portion of the pressure relief holes 5-1 is opened to relieve pressure; the portion of the compression chamber connected to other portions of the pressure relief holes 5-1 is in a relatively low-pressure condition, so that the portion of the pressure relief holes 5-1 is closed and does not relieve pressure. This is a preferred structural form of the compressor of the present invention, that is, since the multiple groups of pressure relief holes are arranged in different circumferential positions around the exhaust port, during the movement of the movable scroll (due to the restriction of the cross slip ring, the movable scroll can only move in a translational direction but not in a rotational direction), the movable scroll is Figure 5 and Figure 6 The compression chamber below the fixed scroll disk performs a back-and-forth contact movement with the scroll of the fixed scroll disk, so that during the movement, some pressure relief holes cannot be effectively connected with the compression chamber due to the blocking effect of the scroll of the movable scroll, and some pressure relief holes are connected with the compression chamber without being blocked by the movable scroll. When the gas pressure in the compression chamber is greater than the preset pressure relief pressure, the pressure relief valve assembly opens to effectively relieve pressure, so that among the multiple groups of pressure relief holes, only the pressure relief holes corresponding to the over-compression position of the compression chamber are automatically and effectively opened to relieve pressure, and the pressure relief holes at other positions are closed, thereby achieving effective pressure relief under over-compression conditions and preventing the exhaust resistance from being too large. On the other hand, only the pressure relief holes at the over-compression position are opened, and the pressure relief holes at other positions are closed, without increasing the invalid clearance volume, thereby ensuring the volumetric efficiency of the compressor and improving the energy efficiency of the compressor.

[0039] Preferably, the pressure relief holes 5-1 are in 4 groups, and each group of the pressure relief holes 5-1 includes 4 pressure relief holes 5-1. This is the preferred number of pressure relief hole groups and the preferred number of pressure relief holes in each group of pressure relief holes of the present invention. Figure 4 As shown, the arrangement of the pressure relief hole groups within a 360° range around the exhaust port is the best implementation method of the pressure relief structure.

[0040] Preferably, the pressure relief hole 5-1 includes at least two curved segments, and the center of the curvature radius of each point in the two relatively long curved segments is aligned with the center of the base circle corresponding to the involute of the spiral tooth of the fixed scroll. R This is the preferred structural form of the pressure relief hole of the present invention, through the center of the curvature radius of each point in the two relatively long curve segments and the base circle center O corresponding to the involute of the spiral tooth of the fixed scroll plate R Located on the same side of the pressure relief hole 5-1, the pressure relief hole can be formed as follows Figure 3 The structure shown is an approximately waist-shaped (concave on the same side of the center of the base circle) special-shaped hole. Such a structure can ensure that the radial outer profile of the pressure relief hole of the fixed scroll and the profile of the movable scroll match as much as possible during the compression process of the fixed scroll and the movable scroll, and will not cause the pressure relief holes to be distributed on both radial sides of the movable scroll. Therefore, it effectively prevents gas blowby on both sides of the movable scroll and prevents pressure leakage in the compression chamber.

[0041] Preferably, the center of the curvature radius corresponding to each point of the curve in the two relatively long curve segments falls within the annular distribution area, and the upper and lower limits of the annular area satisfy the following relationship:

[0042] Where R is the distance from the center of the radius of curvature to the center of the base circle O R The distance between b is the base circle radius of the vortex involute, α is the vortex involute occurrence angle, The starting angle of the spiral involute, Final span angle of the volute involute.

[0043] This is a further preferred setting position of the pressure relief holes of the present invention, that is, the centers of the curvature radii of the two longer curves of the pressure relief holes are distributed within the range of the circular ring spaced R from the center of the base circle, so that multiple groups of pressure relief holes can be effectively set in preferred positions, so that the corresponding positions of the internal compression chamber are more suitable for effective pressure relief at multiple overpressure positions, and too many pressure relief holes are not opened and the pressure relief holes with smaller pressure relief pressure are not blocked to ensure that the clearance volume is not too large, and at the same time, the problems of excessive pressure relief resistance and excessive clearance volume are effectively solved.

[0044] The pressure relief hole structure of the present invention is as follows Figure 2 , 3 As shown, specifically, a pressure relief hole 5-1 is provided on the stationary disk and arranged at the bottom of the scroll of the scroll disk. Figure 4 As shown, the pressure relief hole is a special-shaped hole structure, and multiple curves form a closed flow hole. The pressure relief hole connects the compression chamber and the internal space of the shell. At the same time, the two sections (L1, L2) of the special-shaped hole are longer than the center of the curvature radius corresponding to each point of the curve (O 1-1 , O 1-2 …O 1-i and O 2-1 , O 2-2 …O 2-i , where i is a natural number) and the base circle center OR corresponding to the spiral tooth involute is on the side, and the center of the curvature radius corresponding to each point of the curve falls within the circular distribution area, and the upper and lower limits of the circular area satisfy the following relationship: Where R b is the base circle radius of the vortex involute, α is the vortex involute occurrence angle, The starting angle of the spiral involute, Final span angle of the spiral involute.

[0045] Preferably, a pressure relief channel 5-3 is further included, one end of which is connected to the pressure relief hole 5-1 and the other end is connected to the outside of the fixed scroll 5, and the pressure relief valve assembly 50 is arranged inside the pressure relief channel 5-3. This is a further preferred structural form of the present invention, that is, the setting of the pressure relief channel can ensure that it plays a role in connecting to the pressure relief hole and discharging the overpressure gas, and on the other hand, the pressure relief valve assembly can be effectively arranged therein. Since the volume of the pressure relief hole cannot be opened too large, otherwise both sides of the movable scroll will be connected to the pressure relief hole and pressure leakage will occur, so it is necessary to open the pressure relief channel of the present application.

[0046] Preferably, the pressure relief valve assembly 50 includes a plunger valve body 5-2 and an elastic component 5-4 (preferably a spring), the plunger valve body 5-2 can move in the pressure relief channel 5-3, one end of the plunger valve body 5-2 is opposite to the pressure relief hole 5-1, can move to connect with the pressure relief hole 5-1 to close the gas flow, and can also move to be separated from the pressure relief hole 5-1 to open the gas flow channel, the other end of the plunger valve body 5-2 is connected to one end of the elastic component 5-4, and the other end of the elastic component 5-4 is connected to the end of the static scroll plate 5. This is the preferred structural form of the pressure relief valve assembly of the present invention. The plunger valve body can effectively move in the pressure relief channel to open and close the pressure relief channel. The elastic component is used to generate elastic force to provide a certain preset pressure relief pressure. In the initial state, the elastic component is compressed to press the plunger valve body against the lower end surface of the pressure relief channel. When the pressure in the pressure relief hole increases and when the pressure relief pressure is greater than the preset pressure relief pressure, the plunger valve body is pushed to move upward, thereby opening the pressure relief channel for pressure relief and exhaust.

[0047] Preferably, when the pressure relief hole 5-1 is connected to the compression chamber 100, and when the pressure in the compression chamber 100 is greater than the exhaust pressure + the elastic force of the elastic component, the plunger valve body 5-2 moves to open the pressure relief hole 5-1, and the gas in the compression chamber 100 is discharged from the static scroll plate 5 through the pressure relief hole 5-1 and the pressure relief channel 5-3 to be relieved, wherein the pressure in the compression chamber 100 = the pressure in the pressure relief hole 5-1, and the preset pressure relief pressure = exhaust pressure + the elastic force of the elastic component. This is the operating condition and working condition of the pressure relief hole of the present invention being opened, that is, based on the above pressure relief hole structure, the pressure control structure of the present invention is as follows Figure 6 As shown, when the pressure in the compression chamber is greater than the exhaust pressure + the force of the elastic component 5-4, the plunger valve body 5-2 moves upward, and the special-shaped pressure relief hole 5-1 opens. At this time, the compression chamber is connected with the high-pressure side of the exhaust through the pressure relief hole 5-1 and the pressure relief channel 5-3, and the high-pressure gas in the compression chamber is unloaded into the shell; at this time, over-compression of the compressor is avoided, and the additional power consumption of the isochoric expansion of the high-pressure gas at the exhaust port is eliminated.

[0048] like Figure 5As shown, preferably, when the pressure relief hole 5-1 is not connected to the compression chamber 100, or when the pressure relief hole 5-1 is connected to the compression chamber 100 and the pressure in the compression chamber 100 is less than the exhaust pressure + the elastic force of the elastic component, the plunger valve body 5-2 closes the pressure relief hole 5-1, wherein the pressure in the compression chamber 100 = the pressure in the pressure relief hole 5-1, and the preset pressure relief pressure = the exhaust pressure + the elastic force of the elastic component. This is the operating condition and working condition of the pressure relief hole of the present invention being closed. When the pressure in the compression chamber is less than the exhaust pressure + the force of the elastic component 5-4, the plunger valve body 5-2 will not move, and the special-shaped pressure relief hole 5-1 is closed. At this time, the compression chamber is not connected to the exhaust high-pressure side of the shell; at this time, the plunger valve body fills the useless space in the unloading channel, reduces the invalid clearance volume caused by the unloading channel, reduces the useless clearance volume, improves the volumetric efficiency of the pump body, and improves the overall energy efficiency of the compressor.

[0049] The present invention also provides an air conditioner, which includes the compressor described in any of the preceding items. A pressure relief discharge hole is provided at the bottom of the scroll of the scroll disk, and the discharge hole is a special-shaped hole structure, which is closed by multiple curves, and is characterized in that the center of the curvature radius corresponding to the two longer curves of the special-shaped hole is on the same side as the center of the base circle corresponding to the involute of the scroll tooth, and the curvature center falls on Within the circular area.

[0050] Based on the above characteristics, a pressure control structure is set on the scroll disk, which includes a spring and a plunger valve body, that is, the plunger valve body is used to fill the useless space in the unloading circulation channel to reduce the clearance volume caused by the unloading channel. When the pressure in the compression chamber is greater than the exhaust pressure + spring force, the plunger valve body mechanism opens, and the special-shaped pressure relief hole is connected to the high-pressure side of the exhaust; when the pressure in the compression chamber is less than the exhaust pressure + spring force, the plunger valve body mechanism is closed, and the special-shaped pressure relief hole is in a closed state, effectively avoiding the over-compression loss of the compressor.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. 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 invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A compressor, characterized in that: include: A stationary scroll (5), wherein an exhaust port (5-5) is provided on the stationary scroll (5), and at least two groups of pressure relief holes (5-1) capable of communicating with an internal compression chamber of the stationary scroll (5) are also provided at the scroll bottom of the stationary scroll (5), wherein at least the two groups of pressure relief holes (5-1) are distributed at different circumferential positions around the exhaust port (5-5), and each group of the pressure relief holes (5-1) includes at least one pressure relief hole (5-1), and a pressure relief valve assembly (50) is provided at the pressure relief hole (5-1), and when the pressure relief hole (5-1) is communicated with the compression chamber and when the pressure in the pressure relief hole (5-1) is greater than a preset pressure relief pressure, the pressure relief valve assembly (50) opens to relieve pressure in the compression chamber (100); The pressure relief hole (5-1) comprises at least two curved segments, and the center of the curvature radius of each point in the two relatively long curved segments is parallel to the center O of the base circle corresponding to the involute of the spiral tooth of the fixed scroll disk. R Located on the same side of the pressure relief hole (5-1); The center of the curvature radius corresponding to each point of the curve in two relatively long curve segments falls within the circular distribution area, and the upper and lower limits of the circular distribution area satisfy the following relationship: ， Where R is the distance from the center of the radius of curvature to the center of the base circle O R The distance between b is the base circle radius of the vortex involute, α is the vortex involute occurrence angle, φ s The starting angle of the spiral tooth involute, φ e Final angle of involute of scroll gear; When the compressor is in operation and the movable scroll of the compressor rotates to a specific position, among the multiple groups of pressure relief holes (5-1): the parts of the compression chamber connected to some of the pressure relief holes (5-1) are in a relatively high-pressure working condition, so that the parts of the pressure relief holes (5-1) are opened to release pressure, and the parts of the compression chamber connected to other parts of the pressure relief holes (5-1) are in a relatively low-pressure working condition, so that the parts of the pressure relief holes (5-1) are closed and do not release pressure.

2. The compressor according to claim 1, characterized in that: The pressure relief holes (5-1) are in four groups, and each group of the pressure relief holes (5-1) includes four pressure relief holes (5-1).

3. The compressor according to any one of claims 1-2, characterized in that: It also includes a pressure relief channel (5-3), one end of the pressure relief channel (5-3) is connected to the pressure relief hole (5-1), and the other end is connected to the outside of the fixed scroll (5), and the pressure relief valve assembly (50) is arranged inside the pressure relief channel (5-3).

4. The compressor according to claim 3, characterized in that: The pressure relief valve assembly (50) comprises a plunger valve body (5-2) and an elastic component (5-4); the plunger valve body (5-2) can move in the pressure relief passage (5-3); one end of the plunger valve body (5-2) is opposite to the pressure relief hole (5-1) and can move to connect with the pressure relief hole (5-1) to close the gas flow, and can also move to be separated from the pressure relief hole (5-1) to open the passage for gas flow; the other end of the plunger valve body (5-2) is connected to one end of the elastic component (5-4), and the other end of the elastic component (5-4) is connected to the end of the fixed scroll (5).

5. The compressor according to claim 4, characterized in that: When the pressure relief hole (5-1) is connected to the compression chamber (100) and when the pressure in the compression chamber (100) is greater than the exhaust pressure + the elastic force of the elastic component, the plunger valve body (5-2) moves to open the pressure relief hole (5-1), and the gas in the compression chamber (100) is discharged from the fixed scroll plate (5) through the pressure relief hole (5-1) and the pressure relief channel (5-3) to be depressurized, wherein the pressure in the compression chamber (100) = the pressure in the pressure relief hole (5-1), and the preset pressure relief pressure = the exhaust pressure + the elastic force of the elastic component.

6. The compressor according to claim 4, characterized in that: When the pressure relief hole (5-1) is not connected to the compression chamber (100), or when the pressure relief hole (5-1) is connected to the compression chamber (100) and the pressure in the compression chamber (100) is less than the exhaust pressure + the elastic force of the elastic component, the plunger valve body (5-2) closes the pressure relief hole (5-1), wherein the pressure in the compression chamber (100) = the pressure in the pressure relief hole (5-1), and the preset pressure relief pressure = the exhaust pressure + the elastic force of the elastic component.

7. An air conditioner, characterized in that: A compressor comprising the compressor described in any one of claims 1-6.

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