Scroll compressor, air conditioner

Abstract

This invention provides a scroll compressor and an air conditioner. The scroll compressor includes a stationary scroll, a moving scroll, and a support body. The stationary scroll is fixedly assembled to the first end face of the support body, and the moving scroll is movably assembled to the first end face. An intermediate compression chamber is formed between the scroll teeth of the stationary and moving scrolls, and a back pressure chamber is formed between the support body and the back of the moving scroll. The stationary scroll has an exhaust port and a back pressure inlet flow path is also included. The back pressure inlet flow path can intermittently introduce high-pressure refrigerant gas flow from the intermediate compression chamber into the back pressure chamber. This invention, by intermittently introducing high-pressure refrigerant gas flow from the intermediate compression chamber into the back pressure chamber through the back pressure inlet flow path, forms back pressure, providing a more reasonable back pressure for the moving scroll, preventing the moving scroll from overturning, and ensuring the stable operation of the moving scroll.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a scroll compressor and an air conditioner. Background Technology

[0002] Scroll compressors have been widely used in many fields due to their compact structure, high efficiency and energy saving, stable operation, and low vibration and noise. Scroll compressors utilize the meshing motion of moving and stationary scrolls to compress refrigerant for refrigeration. However, at high speeds, the pressure in the intermediate compression chamber is high, which can easily cause the moving and stationary scrolls to separate due to impact, resulting in axial leakage. Therefore, a back pressure structure design is required. However, the back pressure in the back pressure chamber of existing back pressure structures is unreasonable, easily leading to an imbalance of back pressure on the moving scroll and causing it to overturn. Summary of the Invention

[0003] Therefore, the present invention provides a scroll compressor and an air conditioner that can solve the technical problem in the prior art where the back pressure of the moving scroll plate of the scroll compressor is unreasonable, which easily leads to the overturning of the moving scroll plate.

[0004] To address the aforementioned problems, this invention provides a scroll compressor, comprising a stationary scroll, a moving scroll, and a support body. The stationary scroll is fixedly assembled on the first end face of the support body, and the moving scroll is movably assembled on the first end face. An intermediate compression cavity is formed between the scroll teeth of the stationary scroll and the moving scroll, and a back pressure cavity is formed between the support body and the back of the moving scroll. The stationary scroll has an exhaust port and a back pressure inlet flow path is also included. The back pressure inlet flow path is capable of intermittently introducing high-pressure refrigerant gas flow from the intermediate compression cavity into the back pressure cavity.

[0005] In some embodiments, the scroll compressor further includes a first back pressure relief flow path, which is capable of intermittently introducing the back pressure fluid in the back pressure chamber into the air intake chamber formed between the scroll teeth of the stationary scroll and the moving scroll respectively.

[0006] In some embodiments, a pressure-inducing groove is formed on the inner wall surface of the stationary disk substrate of the stationary scroll disk, and a pressure-inducing through hole is formed on the moving scroll tooth of the moving scroll disk. The pressure-inducing through hole extends along the height of the moving scroll tooth and passes through both ends of the moving scroll disk. During the translational movement of the moving scroll disk, the pressure-inducing through hole has a first state in which the back pressure cavity is connected to the intermediate compression cavity through the pressure-inducing groove. When the pressure-inducing through hole is in the first state, the pressure-inducing through hole and the pressure-inducing groove form the back pressure introduction flow path.

[0007] In some embodiments, during the translational motion of the moving vortex disk, the pressure-guiding through hole also has a second state in which the back pressure chamber and the air intake chamber are connected via the pressure-guiding groove. When the pressure-guiding through hole is in the second state, the pressure-guiding through hole and the pressure-guiding groove form the first back pressure relief flow path.

[0008] In some embodiments, during the translational motion of the moving scroll plate, the pressure-guiding through hole also has a third state in which the air intake chamber, the intermediate compression chamber and the back pressure chamber are simultaneously connected via the pressure-guiding groove. When the pressure-guiding through hole is in the third state, the pressure-guiding through hole and the pressure-guiding groove form a high-pressure relief flow path. During the translational motion of the moving scroll plate, the first state, the third state and the second state are switched sequentially.

[0009] In some embodiments, the pressure groove is a connecting groove extending radially from the inside to the outside along the stationary vortex disk.

[0010] In some embodiments, the pressure-applying groove includes a first groove, a second groove, and a third groove arranged sequentially from the inside to the outside along the radial direction of the static vortex disk, wherein a first partition wall is provided between the first groove and the second groove, and a second partition wall is provided between the second groove and the third groove.

[0011] In some embodiments, with the crankshaft rotation angle corresponding to the end of the intake chamber being 0°, the pressure through hole starts from the first state, sequentially switches to the third state and the second state, and the crankshaft rotation angle is 50° to 345° after completion.

[0012] In some embodiments, the support body is provided with a second back pressure relief flow path, one end of which is connected to the back pressure chamber, and the other end of which is connected to the suction chamber of the scroll compressor.

[0013] The present invention also provides an air conditioner including the scroll compressor described above.

[0014] The scroll compressor and air conditioner provided by this invention have the following beneficial effects:

[0015] The high-pressure refrigerant airflow in the intermediate compression chamber is intermittently introduced into the back pressure chamber through the back pressure inlet flow path to form back pressure. Since the pressure in the intermediate compression chamber varies at different crankshaft rotation angles (the refrigerant pressure in the intermediate compression chamber increases with increasing rotation angle), the back pressure in the back pressure chamber can adaptively change with the pressure in the intermediate compression chamber. This provides a more reasonable back pressure for the moving scroll plate, ensuring its stable operation and preventing overturning. The more reasonable back pressure also reduces leakage caused by the gap between the moving and stationary scroll plates, improving the compressor's volumetric efficiency. It is worth emphasizing that the back pressure airflow in the back pressure chamber in this invention is provided by the high-pressure refrigerant in the intermediate compression chamber, rather than using the high-pressure exhaust gas from the exhaust chamber. Therefore, there is no need to separately install a corresponding throttling structure within the support body for the high-pressure exhaust gas, simplifying the structural design.

[0016] The back pressure chamber and the intake chamber are intermittently connected by the first back pressure relief flow path, so that the back pressure fluid in the back pressure chamber can carry the lubricating oil into the intake chamber, which can achieve sufficient lubrication of the stationary scroll plate and the moving scroll plate and prevent excessive wear between them.

[0017] When the pressure through-hole is in the third state, the high-pressure refrigerant in the intermediate compression chamber enters the back pressure chamber to form back pressure, and at the same time, the back pressure refrigerant in the back pressure chamber enters the intake chamber. This can effectively prevent the wear problem caused by excessive back pressure due to excessive refrigerant pressure in the intermediate compression chamber, which leads to excessive clamping axial force of the dynamic and static scrolls. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the internal structure of a scroll compressor according to the first embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 3 yes Figure 1 A schematic diagram of the axial projection of the stationary vortex disk in one embodiment;

[0022] Figure 4 yes Figure 1 A schematic diagram of the axial projection of the stationary vortex disk in another embodiment;

[0023] Figure 5 yes Figure 1 A schematic diagram of the axial projection of the stationary vortex disk in another embodiment;

[0024] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle;

[0025] Figure 7 yes Figure 5 Longitudinal cross-section of the stationary vortex disk;

[0026] Figure 8 yes Figure 7 A magnified view of a section at point C;

[0027] Figure 9 yes Figure 1 A schematic diagram of the moving vortex disk in another embodiment;

[0028] Figure 10 This is a schematic diagram showing the change of the average back pressure in the back pressure chamber during crankshaft rotation in an embodiment of the present invention. During the stable operation of the pump assembly, the back pressure in the back pressure chamber is maintained at approximately (Px+Py+Pz) / 3.

[0029] Figures 11a to 11c This is a schematic diagram showing the state of the pressure through hole in the moving scroll disk of the present invention, which switches from the first state (a) to the third state (b) and then to the second state (c) during the translation process (from air intake to air exhaust).

[0030] The attached figures are labeled as follows:

[0031] 1. Static vortex disk; 101. Intermediate compression chamber; 102. Intake chamber; 11. Exhaust port; 12. Pressure-inducing groove; 121. First groove; 122. Second groove; 123. Third groove; 13. Static vortex teeth; 2. Moving vortex disk; 21. Pressure-inducing through hole; 22. Moving vortex teeth; 3. Support body; 31. Second back pressure relief flow path; 100. Back pressure chamber; 200. Exhaust chamber; 301. Cover body; 302. Crankshaft; 3021. Crankshaft bearing; 3022. Moving disk bearing; 3023. Tail end support bearing; 303. Drive motor; 304. Housing; 305. Anti-rotation pin; 400. Suction chamber; 401. Intake port. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0035] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0036] Due to the characteristics of the refrigerant, the suction and discharge pressure ratio of the scroll compressor is relatively small and the pressure difference is relatively large during operation. The pump body generates a large axial force when compressing the refrigerant, which pushes the moving scroll and stationary scroll of the pump body to both sides, resulting in gas leakage and reducing the volumetric efficiency of the compressor. Therefore, it is necessary to make necessary improvements to the scroll compressor to balance the pressure between the back pressure chamber and the intermediate compression chamber, so as to ensure the efficient and stable operation of the moving scroll and stationary scroll.

[0037] See also Figures 1 to 1 As shown in Figure 1, according to an embodiment of the present invention, a scroll compressor is provided, including a stationary scroll 1, a moving scroll 2, and a support body 3, wherein the stationary scroll 1 is fixedly assembled to the first end face of the support body 3 (i.e., Figure 1 On the left end face (shown in the orientation), the moving scroll disk 2 is movably assembled onto the first end face, and an intermediate compression cavity 101 is formed between the scroll teeth of the stationary scroll disk 1 and the moving scroll disk 2. Specifically, the back of the moving scroll disk 2 is rotatably connected to one end of the crankshaft 302 via a moving disk bearing 3022, and the crankshaft 302 is rotatably connected to the support body 3 via a crankshaft bearing 3021. The motor rotor of the drive motor 303 is mounted on the crankshaft 302, and the other end of the crankshaft 302 is rotatably supported on the inner wall of the housing 304 via a tail end support bearing 3023. The motor stator of the drive motor 303 is assembled inside the housing 304, and the drive motor 303 is used to drive the crankshaft 302. 2. Rotation: A back pressure cavity 100 is formed between the support body 3 and the back of the moving scroll plate 2. The stationary scroll plate 1 has an exhaust port 11. A cover 301 is assembled on the side of the stationary scroll plate 1 away from the moving scroll plate 2, and an exhaust cavity 200 is formed between the two. The exhaust cavity 200 forms a refrigerant circulation with the external air conditioning system through an exhaust pipe. It also includes a back pressure inlet flow path (not labeled in the figure). The back pressure inlet flow path can intermittently introduce the high-pressure refrigerant (lower than the exhaust pressure) airflow in the intermediate compression cavity 101 into the back pressure cavity 100. The aforementioned intermittent means that, with the translation of the moving scroll plate 2, the back pressure inlet flow path can periodically connect or disconnect the intermediate compression cavity 101 and the back pressure cavity 100.

[0038] In this technical solution, the high-pressure refrigerant airflow in the intermediate compression chamber 101 is intermittently introduced into the back pressure chamber 100 through the back pressure introduction flow path to form back pressure. Since the pressure in the intermediate compression chamber 101 varies at different rotation angles of the crankshaft 302 (as the rotation angle increases, the refrigerant pressure in the intermediate compression chamber 101 also increases), the back pressure in the back pressure chamber 100 can adapt to the pressure changes in the intermediate compression chamber 101. This provides a more reasonable back pressure for the moving scroll plate 2, ensuring stable operation of the moving scroll plate 2 and preventing it from overturning. The more reasonable back pressure also reduces leakage caused by the gap between the moving and stationary scroll plates, improving the volumetric efficiency of the compressor. It is worth emphasizing that the back pressure airflow in the back pressure chamber in this invention is provided by the high-pressure refrigerant in the intermediate compression chamber 101, instead of using the high pressure of the exhaust chamber. Therefore, there is no need to set up a corresponding throttling structure in the support body 3 specifically for the high pressure of the exhaust, simplifying the structural design.

[0039] In some embodiments, the scroll compressor further includes a first back pressure relief flow path (not labeled in the figure), which can intermittently introduce the back pressure fluid in the back pressure chamber 100 into the suction chamber 102 formed between the scroll teeth of the stationary scroll disk 1 and the moving scroll disk 2 respectively.

[0040] In this technical solution, the back pressure chamber 100 and the suction chamber 102 are intermittently connected through the first back pressure relief flow path, so that the back pressure fluid in the back pressure chamber 100 can carry the lubricating oil into the suction chamber 102, which can achieve sufficient lubrication of the stationary scroll plate 1 and the moving scroll plate 2, and prevent excessive wear between them.

[0041] In principle, by setting corresponding pressure-inducing through holes on the stationary vortex teeth 13 of the stationary vortex disk 1 and corresponding pressure-inducing grooves on the moving disk base plate of the moving vortex disk 2, the relative positions of the two can be changed during the translational rotation of the moving vortex disk 2. This allows for intermittent communication between the pressure-inducing grooves and pressure-inducing through holes and the back pressure chamber 100 and the intermediate compression chamber 101, thereby enabling the intermittent introduction of medium-pressure back pressure airflow into the back pressure chamber 100. Figure 9 As shown, the pressure-guiding through-hole 21 is constructed on the moving disk substrate, while the pressure-guiding groove is constructed on the stationary volute tooth 13. In this case, the thickness of the stationary volute tooth 13 needs to be relatively large to ensure its structural strength. In another preferred embodiment, referring to [reference needed]... Figures 3 to 6As shown, a pressure-inducing groove 12 is formed on the inner wall surface of the stationary disk substrate (not labeled in the figure) of the stationary scroll disk 1, and a pressure-inducing through hole 21 is formed on the moving scroll tooth 22 (not labeled in the figure) of the moving scroll disk 2. The pressure-inducing through hole 21 extends along the height of the moving scroll tooth 22 and passes through both ends of the moving scroll disk 2. During the translation of the moving scroll disk 2, the pressure-inducing through hole 21 has a first state in which the back pressure cavity 100 is connected to the intermediate compression cavity 101 through the pressure-inducing groove 12. When the pressure-inducing through hole 21 is in the first state, the pressure-inducing through hole 21 and the pressure-inducing groove 12 form the back pressure introduction flow path.

[0042] In this technical solution, the pressure-inducing through hole 21 is constructed on the moving scroll tooth 22, while the pressure-inducing groove 12 is constructed on the stationary disk substrate. In this way, the pressure-inducing groove 12 of appropriate size can be designed to allow the high-pressure refrigerant in the intermediate compression chamber 101 to be introduced smoothly and for a longer period of time. It can be understood that the longer the high-pressure refrigerant is introduced into the intermediate compression chamber 101, the longer the intermediate compression chamber 101 enters the back pressure chamber 100 through the pressure-inducing groove 12 and the pressure-inducing through hole 21. The longer the back pressure in the back pressure chamber 100 can follow the pressure change in the intermediate compression chamber 101, the longer the back pressure in the back pressure chamber 100 can follow the pressure change in the intermediate compression chamber 101. This makes the back pressure in the back pressure chamber 100 and the separation force between the moving scroll 2 and the stationary scroll 1 caused by the intermediate compression chamber 101 reach equilibrium, and the back pressure adjustment is more reasonable.

[0043] In some embodiments, during the translation of the moving scroll disk 2, the pressure-guiding through hole 21 also has a second state in which the back pressure chamber 100 and the air intake chamber 102 are connected via the pressure-guiding groove 12. When the pressure-guiding through hole 21 is in the second state, the pressure-guiding through hole 21 and the pressure-guiding groove 12 form the first back pressure relief flow path.

[0044] In this technical solution, the pressure through hole 21 has a second state that connects the back pressure chamber 100 and the suction chamber 102. In the second state, the back pressure in the back pressure chamber 100 is higher than the suction pressure in the suction chamber 102. Therefore, the refrigerant in the back pressure chamber 100 will carry the lubricating oil into the suction chamber 102, thereby providing sufficient lubrication between the stationary scroll plate 1 and the moving scroll plate 2, while preventing the back pressure in the back pressure chamber 100 from being too large, which would cause the axial force (clamping force) between the stationary scroll plate 1 and the moving scroll plate 2 to be too large and thus cause severe wear between them.

[0045] In some embodiments, during the translational motion of the moving scroll plate 2, the pressure-guiding through hole 21 also has a third state in which the air intake chamber 102, the intermediate compression chamber 101, and the back pressure chamber 100 are simultaneously connected via the pressure-guiding groove 12. When the pressure-guiding through hole 21 is in the third state, the pressure-guiding through hole 21 and the pressure-guiding groove 12 form a high-pressure relief flow path. During the translational motion of the moving scroll plate 2, the first state, the third state, and the second state are switched sequentially. That is, within one cycle from the completion of air intake in the air intake chamber to the completion of air compression and exhaust in the moving scroll plate 2, the pressure-guiding through hole 21 is first in the first state, then switches to the third state, and finally switches to the second state.

[0046] In this technical solution, the pressure-guiding through-hole 21 also has a third state in which the intake chamber 102, the intermediate compression chamber 101, and the back pressure chamber 100 are simultaneously connected via the pressure-guiding groove 12. In the third state, the intake chamber 102, the intermediate compression chamber 101, and the back pressure chamber 100 are simultaneously connected. That is, at this time, while the high-pressure refrigerant in the intermediate compression chamber 101 enters the back pressure chamber 100 to form back pressure, the back pressure refrigerant in the back pressure chamber 100 simultaneously enters the intake chamber 102. This can effectively prevent the wear problem caused by excessive back pressure due to excessive refrigerant pressure in the intermediate compression chamber 101, which leads to excessive clamping axial force on the dynamic and static scroll plates. It is understood that the refrigerant pressure in the intermediate compression chamber 101 in the first state is lower than the refrigerant pressure in the intermediate compression chamber 101 in the third state, while the refrigerant pressure in the intermediate compression chamber 101 in the second state is higher than the refrigerant pressure in the intermediate compression chamber 101 in the third state. In a specific embodiment, when the pressure-guiding through-hole 21 is in the third state, the communication area between the pressure-guiding groove 12 and the intermediate compression chamber 101 is greater than the communication area between the pressure-guiding groove 12 and the suction chamber 102.

[0047] In some embodiments, the support body 3 is provided with a second back pressure relief flow path 31. One end of the second back pressure relief flow path 31 is connected to the back pressure chamber 100, and the other end of the second back pressure relief flow path 31 is connected to the suction chamber 400 of the scroll compressor. This allows for reasonable adjustment of the back pressure in the back pressure chamber 100 while draining the lubricating oil in the back pressure chamber 100 into the suction chamber 400, thereby achieving sufficient lubrication of the moving parts, such as the bearings, inside the casing 304 of the scroll compressor.

[0048] Specific combination Figure 10 As shown, the moving scroll disk 2 operates in the α range (see...). Figure 10During the process shown, the pressure-inlet through-hole 21 is connected to the pressure-inlet groove 12 of the stationary vortex disk 1, and only connects to the intermediate compression chamber 101. The high-pressure gas in the intermediate compression chamber 101 enters the back pressure chamber 100 (the pressure-inlet through-hole 21 is in the first state at this time) through the pressure-inlet groove 12 and the pressure-inlet through-hole 21 in sequence. The high-pressure gas causes the pressure in the back pressure chamber 100 to increase (that is, the back pressure increases). After the moving vortex disk 2 is subjected to the back pressure, it gradually approaches the stationary vortex disk 1. When the back pressure reaches the preset pressure, the force on the moving vortex disk 2 reaches equilibrium, thereby ensuring the stable operation of the moving vortex disk 2. The pressure-inlet through-hole 21 is opened on the moving vortex tooth 22, and the diameter of the hole is smaller than the wall thickness of the moving vortex tooth 22 to avoid damaging the strength of the moving vortex tooth 22 and leakage between the vortex disks. The pressure-inlet through-hole 21 is located far away from the exhaust chamber 200 to avoid large pressure changes during the pressure inlet process, which would cause large pressure fluctuations in the back pressure chamber 100 and make the moving vortex disk 2 unstable.

[0049] As the moving scroll plate 2 continues to rotate, the gas pressure in the intermediate compression chamber 101 gradually increases, and the pressure entering the back pressure chamber 100 through the pressure inlet 21 increases. The force on the back of the moving scroll plate 2 becomes excessive, increasing the frictional power consumption between the moving scroll plate 2 and the stationary scroll plate 1, thus increasing the compressor power. When the moving scroll plate 2 continues to rotate in the β range (see...),... Figure 10 As shown), the gas pressure in the intermediate compression chamber 101 continues to increase, and the airflow pressure in the back pressure chamber 100 increases. The pressure-inducing through hole 21 and the pressure-inducing groove 12 of the stationary vortex disk 1 continue to be connected, and at the same time connect the back pressure chamber 100, the intermediate compression chamber 101 and the intake chamber 102. The intermediate compression chamber 101 causes the pressure in the back pressure chamber 100 to increase. The high-pressure gas in the back pressure chamber 100 is simultaneously depressurized through the high-pressure relief flow path and the second back pressure relief flow path 31. The pressure in the back pressure chamber 100 is affected by the pressure changes of the intermediate compression chamber 101 and the intake chamber 102. The back pressure will not be too high, resulting in excessive frictional power consumption.

[0050] As the moving vortex disk 2 continues to rotate within the γ range (see...) Figure 10 As shown, the pressure-inducing through-hole 21 connects only the back pressure chamber 100 and the suction chamber 102. The gas pressure in the back pressure chamber 100 is greater than the pressure in the suction chamber 102. Therefore, the high-pressure airflow enters the suction chamber 102 through the pressure-inducing through-hole 21, achieving sufficient lubrication between the moving and stationary scrolls. At the same time, together with the aforementioned second back pressure relief flow path 31, it reasonably adjusts the back pressure of the refrigerant in the back pressure chamber 100. That is, it performs secondary pressure adjustment based on the first back pressure relief flow path, gradually leaking the pressure in the back pressure chamber 100 to reach a new balance.

[0051] In some embodiments, when the intake chamber 102 reaches the end of intake, the rotation angle corresponding to the crankshaft 302 is 0°, and the pressure-guiding through-hole 21 changes from the first state ( Figure 11a Starting from ), it sequentially switches to the third state ( Figure 11b) and the second state ( Figure 11c After completion, the crankshaft 302 rotates by an angle of 50° to 345°. In one specific embodiment, Figure 10 In this context, α represents the interval from 250° to 282°, β represents the interval from 282° to 299°, and γ represents the interval from 299° to 345°.

[0052] In some embodiments, the pressure groove 12 is a communicating groove extending radially from the inside to the outside along the stationary vortex disk 1, for example... Figure 3 The waist-shaped hole shown Figure 4 The circular hole shown in the figure. It should be noted that the aforementioned radial extension from the inside to the outside refers to the first end of the connecting groove being located near the central region of the stationary vortex disk 1, and the second end being located near the outer edge region of the stationary vortex disk 1. It does not mean that the length extension direction of the connecting groove must be along the diameter direction of the stationary vortex disk 1.

[0053] See also Figure 5 and Figure 6 As shown, in some embodiments, the pressure groove 12 includes a first groove 121, a second groove 122 and a third groove 123 arranged sequentially from the inside to the outside along the radial direction of the static vortex disk 1. The first groove 121 and the second groove 122 have a first partition wall (not shown in the figure), and the second groove 122 and the third groove 123 have a second partition wall (not shown in the figure).

[0054] According to an embodiment of the present invention, an air conditioner is also provided, including the scroll compressor described above.

[0055] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0056] The above description is merely 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 principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A scroll compressor comprising a stationary scroll plate (1), a movable scroll plate (2) and a bracket body (3), the stationary scroll plate (1) being fixedly assembled on a first end surface of the bracket body (3), the movable scroll plate (2) being translatably assembled on the first end surface, and the stationary scroll plate (1) and the movable scroll plate (2) each having scroll teeth between which an intermediate compression chamber (101) is formed, a back pressure chamber (100) being formed between the bracket body (3) and a back surface of the movable scroll plate (2), the stationary scroll plate (1) having a discharge port (11), characterized in that, The back pressure introduction flow path can intermittently introduce high-pressure refrigerant gas flow in the intermediate compression cavity (101) into the back pressure cavity (100); the first back pressure pressure relief flow path can intermittently introduce back pressure fluid in the back pressure cavity (100) into the suction cavity (102) formed between the scroll teeth of the static scroll plate (1) and the dynamic scroll plate (2) respectively; the inner wall surface of the static plate base plate of the static scroll plate (1) is formed with a pressure introduction groove (12), the dynamic scroll teeth (22) of the dynamic scroll plate (2) are formed with a pressure introduction through hole (21), the pressure introduction through hole (21) extends along the height of the dynamic scroll teeth (22) and penetrates through both ends of the dynamic scroll plate (2), in the process of the dynamic scroll plate (2) moving, the pressure introduction through hole (21) has a first state of communicating the back pressure cavity (100) and the intermediate compression cavity (101) through the pressure introduction groove (12), when the pressure introduction through hole (21) is in the first state, the pressure introduction through hole (21) and the pressure introduction groove (12) form the back pressure introduction flow path; in the process of the dynamic scroll plate (2) moving, the pressure introduction through hole (21) also has a second state of communicating the back pressure cavity (100) and the suction cavity (102) through the pressure introduction groove (12), when the pressure introduction through hole (21) is in the second state, the pressure introduction through hole (21) and the pressure introduction groove (12) form the first back pressure pressure relief flow path; in the process of the dynamic scroll plate (2) moving, the pressure introduction through hole (21) also has a third state of simultaneously communicating the suction cavity (102), the intermediate compression cavity (101) and the back pressure cavity (100) through the pressure introduction groove (12), when the pressure introduction through hole (21) is in the third state, the pressure introduction through hole (21) and the pressure introduction groove (12) form a high-pressure pressure relief flow path, in the process of the dynamic scroll plate (2) moving, the first state, the third state and the second state are switched in turn.

2. The scroll compressor of claim 1, wherein The pressure introduction groove (12) is a communication groove extending from inside to outside along the radial direction of the static scroll plate (1).

3. The scroll compressor of claim 1, wherein The pressure introduction groove (12) includes a first groove (121), a second groove (122) and a third groove (123) arranged in turn from inside to outside along the radial direction of the static scroll plate (1), the first groove (121) and the second groove (122) have a first interval wall, and the second groove (122) and the third groove (123) have a second interval wall.

4. The scroll compressor of claim 1, wherein The rotation angle of the crankshaft (302) corresponding to the end of suction of the suction cavity (102) is 0°, after the pressure introduction through hole (21) is switched from the first state to the third state and then to the second state in turn, the rotation angle of the crankshaft (302) is 50°-345°.

5. The scroll compressor of claim 1, wherein, The support body (3) is configured with a second back pressure relief flow path (31), one end of the second back pressure relief flow path (31) is communicated with the back pressure cavity (100), and the other end of the second back pressure relief flow path (31) is communicated with a suction pressure cavity (400) of the scroll compressor.

6. An air conditioner characterized by comprising: The scroll compressor comprises the scroll compressor according to any one of claims 1 to 5.

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