Static scroll plate and scroll compressor

Abstract

The invention provides a static scroll plate and a scroll compressor, the static scroll plate is provided with a first surface, the first surface is provided with a pressure relief hole group, the pressure relief hole group comprises a pressure relief hole and a connecting hole, and the connecting hole is used for being connected with one end of a pressure relief valve plate through a fastener to enable the other end of the pressure relief valve plate to open and close the pressure relief hole; the first surface is provided with a first area located between the pressure relief hole and the connecting hole, and the first area is opposite to the pressure relief valve plate when the pressure relief valve plate is closed; the pressure relief hole set further comprises a first counter bore formed in the first area. According to the technical scheme, due to the fact that the first counter bore is formed in the first area, the first counter bore is opposite to the pressure relief valve plate when the pressure relief valve plate is closed, the opening characteristic of the pressure relief valve plate can be improved, the pressure relief valve plate is easier to open, the problem that the pressure relief valve plate is not opened in time can be solved, and the energy efficiency of the compressor is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular relates to a stationary scroll and a scroll compressor. Background Art

[0002] At present, the development trend of scroll compressors is towards high efficiency. In this process, due to its own structural design characteristics, the pressure relief valve does not open in time under some operating conditions, which has become a major bottleneck restricting its energy efficiency improvement. Summary of the invention

[0003] Therefore, the present invention provides a stationary scroll and a scroll compressor, which can solve the technical problem in the prior art that the pressure relief valve is not opened in time, resulting in reduced energy efficiency of the compressor.

[0004] In order to solve the above problem, the present invention provides a static scroll, the static scroll having a first surface, a pressure relief hole group is provided on the first surface, the pressure relief hole group includes a pressure relief hole and a connecting hole, the connecting hole is used to be connected to one end of a pressure relief valve plate through a fastener, so that the other end of the pressure relief valve plate opens and closes the pressure relief hole;

[0005] The first surface has a first area between the pressure relief hole and the connecting hole, and the first area is opposite to the pressure relief valve plate when the pressure relief valve plate is closed;

[0006] Wherein, the pressure relief hole group further includes a first countersunk hole arranged on the first area.

[0007] In some embodiments, the pressure relief hole group further includes a second countersunk hole. The number of the pressure relief holes is more than two and all are arranged in the second countersunk hole. The other end of the pressure relief valve plate opens and closes each of the pressure relief holes by opening and closing the second countersunk hole.

[0008] In some embodiments, the distance between the center lines of the connecting hole and the second countersunk hole is L1, and the distance between the center lines of the first countersunk hole and the second countersunk hole is L2, wherein L2=a*L1, a=1 / 3 to 2 / 3.

[0009] In some embodiments, the number of the pressure relief hole groups is more than two and is distributed at different positions on the first surface, and the number of the first regions is equal to the number of the pressure relief hole groups and corresponds one to one.

[0010] In some embodiments, the pressure relief valve plate has an opening, and the opening is opposite to the first area when the pressure relief valve plate is closed.

[0011] In some embodiments, the opening is a round hole or a square hole;

[0012] Alternatively, the opening includes a countersunk hole group, the countersunk hole group includes a first strip countersunk hole and a second strip countersunk hole arranged in an eight-shaped shape, the first strip countersunk hole and the second strip countersunk hole are symmetrically arranged about the center plane in the length direction of the pressure relief valve plate, and the small mouth end of the eight-shaped shape faces the other end of the pressure relief valve plate, the end of the first strip countersunk hole away from the second strip countersunk hole passes through one side of the pressure relief valve plate in the width direction, and the end of the second strip countersunk hole away from the first strip countersunk hole passes through the other side of the pressure relief valve plate in the width direction.

[0013] In some embodiments, when the pressure relief valve plate is closed, the distance between the center lines of the opening and the first counterbore is L3, and the length of the pressure relief valve plate is L, wherein L3=b*L, b=1 / 5-1 / 4.

[0014] The present invention also provides a scroll compressor, which includes any one of the above-mentioned fixed scrolls.

[0015] The static scroll and scroll compressor provided by the present invention have the following beneficial effects:

[0016] 1. Since the first countersunk hole is arranged in the first area, the first countersunk hole is opposite to the pressure relief valve plate when the pressure relief valve plate is closed, so that the opening characteristics of the pressure relief valve plate can be improved, and the pressure relief valve plate can be opened more easily, thereby reducing the problem of untimely opening of the pressure relief valve plate and improving the energy efficiency of the compressor.

[0017] 2. By setting an opening on the pressure relief valve plate, the opening characteristics of the pressure relief valve plate can be further improved, making the pressure relief valve plate easier to open, thereby reducing the problem of untimely opening of the pressure relief valve plate and improving the energy efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of a static scroll provided by one embodiment of the present invention;

[0020] Figure 2 yes Figure 1 Assembly drawing of the stationary vortex disc, pressure relief valve plate and pressure relief valve plate;

[0021] Figure 3 It is a structural schematic diagram of a pressure relief valve plate provided by an embodiment of the present invention;

[0022] Figure 4 is a structural schematic diagram of a pressure relief valve plate provided by another embodiment of the present invention;

[0023] Figure 5 is a structural schematic diagram of a pressure relief valve plate provided by another embodiment of the present invention;

[0024] Figure 6 is a structural schematic diagram of a scroll compressor provided by one embodiment of the present invention;

[0025] Figure 7 A comparison diagram of power consumption of a compressor under different working conditions of a compressor according to an embodiment of the present invention is shown;

[0026] Figure 8 A comparison chart of compressor power consumption under different working conditions of a compressor according to another embodiment of the present invention is shown.

[0027] The accompanying drawings are marked as follows:

[0028] 1. movable scroll; 2. casing; 3. fixed scroll; 4. upper bracket; 5. main bearing; 6. motor; 7. crankshaft; 8. auxiliary bearing; 9. lower cover; 10. cross slip ring; 11. upper cover; 12. pressure relief valve plate; 12a. opening; 13. pressure relief valve seat; 14. fastener; 31. first surface; 300. pressure relief hole group; 301. connecting hole; 302. pressure relief hole; 303. second countersunk hole; 311. first area; 3a01. first countersunk hole; 12a1. through hole; 120. countersunk hole group; 12a2. first strip countersunk hole; 12a3. second strip countersunk hole; 121. one end of the pressure relief valve plate; 122. the other end of the pressure relief valve plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0032] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0033] See also Figure 1-2 As shown, according to an embodiment of the present invention, a static scroll 3 is provided, and the static scroll 3 has a first surface 31, and a pressure relief hole group 300 is provided on the first surface 31. The pressure relief hole group 300 includes a pressure relief hole 302 and a connecting hole 301. The connecting hole 301 is used to connect with one end 121 of the pressure relief valve plate through a fastener 14, so that the other end 122 of the pressure relief valve plate opens and closes the pressure relief hole 302. Among them, the pressure relief valve plate 12 is provided with a through hole 12a1 for the fastener 14 to pass through. In some embodiments, the connecting hole 301 can be a threaded hole, and the fastener 14 is a screw adapted to the threaded hole. The screw is used to pass through the through hole 12a1 on the pressure relief valve plate 12 and be screwed into the threaded hole to fix one end 121 of the pressure relief valve plate on the static scroll 3.

[0034] The first surface 31 has a first area 311 between the pressure relief hole 302 and the connecting hole 301 . The first area 311 is opposite to the pressure relief valve plate 12 when the pressure relief valve plate 12 is closed. The pressure relief hole group 300 further includes a first countersunk hole 3a01 disposed on the first area 311 .

[0035] In the above example, since the first countersunk hole 3a01 is arranged in the first area 311, the first countersunk hole 3a01 is opposite to the pressure relief valve plate 12 when the pressure relief valve plate 12 is closed. This can improve the opening characteristics of the pressure relief valve plate 12 and make the pressure relief valve plate 12 easier to open, thereby reducing the problem of untimely opening of the pressure relief valve plate 12 and improving the energy efficiency of the compressor.

[0036] In some embodiments, Figure 1-2 As shown, the first surface 31 is the end surface of the fixed scroll 3, and the first surface 31 is a plane.

[0037] In some embodiments, Figure 2 As shown, the aforementioned fixed scroll 3 is also provided with a pressure relief valve seat 13, which is located on the side of the pressure relief valve plate 12 away from the fixed scroll 3. The pressure relief valve seat 13 and the pressure relief valve plate 12 are both fixed to the fixed scroll 3 by the aforementioned same fastener 14. Specifically, when the fastener 14 is a screw, the screw passes through the pressure relief valve seat 13 and the pressure relief valve plate 12 in sequence and is screwed into the threaded hole to fix one end of both the pressure relief valve seat 13 and the pressure relief valve plate 12 to the fixed scroll 3.

[0038] In some embodiments, Figure 1 As shown, the pressure relief hole group 300 further includes a second countersunk hole 303. The number of the pressure relief holes 302 is more than two, and all are arranged in the second countersunk hole 303. The other end 122 of the pressure relief valve plate opens and closes each pressure relief hole 302 by opening and closing the second countersunk hole 303.

[0039] In the above example, the second counterbore 303 has the function of buffering the airflow of each pressure relief hole 302, thereby reducing the impact force of the airflow on the pressure relief valve plate 12 and improving the service life of the pressure relief valve plate 12. In addition, the present invention uses more than two small-diameter pressure relief holes 302 to replace the existing single large-diameter pressure relief hole for pressure relief, which can reduce the leakage of gas when the pressure relief valve plate 12 is closed.

[0040] In some embodiments, Figure 1 As shown, the distance between the center lines of the aforementioned connecting hole 301 and the second countersunk hole 303 is L1. The distance between the center lines of the first countersunk hole 3a01 and the second countersunk hole 303 is L2. Wherein, L2 = a*L1, a = 1 / 3 to 2 / 3.

[0041] In the above example, by making L2 = a*L1, the opening characteristic of the pressure relief valve plate 12 can be further improved, the power consumption of the compressor can be reduced, and the energy efficiency of the compressor can be improved.

[0042] Figure 7 A comparison chart of compressor power consumption under different working conditions of a compressor according to an embodiment of the present invention is shown. Among them, the scheme of this embodiment of the present invention is: the distance between the center lines of the connecting hole 301 and the second countersunk hole 303 is L1, and the distance between the center lines of the first countersunk hole 3a01 and the second countersunk hole 303 is L2, and L2 = a*L1, a = 1 / 3 to 2 / 3. The comparison scheme is: there is no first countersunk hole 3a01 on the first surface 31, or the first countersunk hole 3a01 is provided on the first surface 31, but L2 is not equal to a*L1. From this Figure 7 It can be seen that, compared with the comparative scheme, the scheme of the present invention can effectively reduce the power consumption of the compressor in working conditions 1 to 7. Among them, working conditions 1 to 7 are 7 commonly used working conditions for compressors. Figure 7 It can be seen from the difference ratio line in that under working condition 1, the power consumption of the compressor of the scheme of the present invention is reduced by 0.56% relative to the comparative scheme; under working condition 2, the power consumption of the compressor of the scheme of the present invention is reduced by 0.29% relative to the comparative scheme; under working condition 3, the power consumption of the compressor of the scheme of the present invention is reduced by 0.07% relative to the comparative scheme; under working condition 4, the power consumption of the compressor of the scheme of the present invention is reduced by 0.77% relative to the comparative scheme; under working condition 5, the power consumption of the compressor of the scheme of the present invention is reduced by 2.47% relative to the comparative scheme; under working condition 6, the power consumption of the compressor of the scheme of the present invention is reduced by 1.51% relative to the comparative scheme; under working condition 7, the power consumption of the compressor of the scheme of the present invention is reduced by 0.41% relative to the comparative scheme. In summary, it can be seen that the power consumption of the compressor of the scheme of the present invention is significantly reduced relative to the comparative scheme, and the reduction range is between 0.07% and 2.47%.

[0043] In some embodiments, Figure 1-2 As shown, the number of the pressure relief hole groups 300 may be more than two, and they are distributed at different positions on the first surface 31. The number of the first regions 311 is equal to the number of the pressure relief hole groups 300, and they correspond one to one.

[0044] In the above example, compared with a single pressure relief hole group 300 , the present invention can make pressure relief smoother by arranging pressure relief hole groups 300 at different positions.

[0045] In some embodiments, Figure 3-5 As shown, the pressure relief valve plate 12 has an opening 12a, and the opening 12a is opposite to the first area 311 when the pressure relief valve plate 12 is closed.

[0046] In the above example, by setting the opening hole 12a on the pressure relief valve plate 12, the opening characteristics of the pressure relief valve plate 12 can be further improved, making the pressure relief valve plate 12 easier to open, thereby reducing the problem of untimely opening of the pressure relief valve plate 12 and improving the energy efficiency of the compressor.

[0047] In the first example, the aforementioned opening 12a may be a circular hole (eg Figure 4 as shown) or square holes (as Figure 3 shown) etc.

[0048] In the second example, if Figure 5 As shown, the aforementioned opening 12a may include a countersunk hole group 120, and the countersunk hole group 120 may include a first strip countersunk hole 12a2 and a second strip countersunk hole 12a3 arranged in an eight-shaped shape, and the first strip countersunk hole 12a2 and the second strip countersunk hole 12a3 are symmetrically arranged about the central plane in the length direction of the pressure relief valve plate 12, and the small mouth end of the eight-shaped shape faces the other end 122 of the pressure relief valve plate. One end of the first strip countersunk hole 12a2 away from the second strip countersunk hole 12a3 passes through one side in the width direction of the pressure relief valve plate 12, and one end of the second strip countersunk hole 12a3 away from the first strip countersunk hole 12a2 passes through the other side in the width direction of the pressure relief valve plate 12.

[0049] In the above example, the countersunk hole group 120 with an eight-shaped design has the effect of convenient processing, and is conducive to further improving the opening characteristics of the pressure relief valve plate 12, making the pressure relief valve plate 12 easier to open, thereby reducing the problem of untimely opening of the pressure relief valve plate 12 and improving the energy efficiency of the compressor.

[0050] In some embodiments, Figure 5 As shown, the number of the countersunk hole groups 120 can be more than two, and they are arranged in sequence along the length direction of the pressure relief valve plate 12. This is beneficial to further improve the opening characteristics of the pressure relief valve plate 12, making the pressure relief valve plate 12 easier to open, thereby reducing the problem of untimely opening of the pressure relief valve plate 12 and improving the energy efficiency of the compressor.

[0051] In some embodiments, Figure 3 As shown, when the pressure relief valve plate 12 is closed, the distance between the center lines of the aforementioned opening 12a and the first counterbore 3a01 is L3, and the length of the pressure relief valve plate 12 is L. Among them, L3 = b*L, b = 1 / 5 to 1 / 4.

[0052] In the above example, by making L3 = b*L, the opening characteristic of the pressure relief valve plate 12 can be further improved, the power consumption of the compressor can be reduced, and the energy efficiency of the compressor can be improved.

[0053] Figure 8A comparison chart of compressor power consumption under different working conditions of another embodiment of the present invention is shown. Among them, the scheme of this other embodiment of the present invention is: when the pressure relief valve plate 12 is closed, the distance between the center lines of the aforementioned opening 12a and the first countersunk hole 3a01 is L3, and the length of the pressure relief valve plate 12 is L. Among them, L3 = b*L, b = 1 / 5~1 / 4. The comparison scheme is: there is no opening 12a on the pressure relief valve plate 12, and no first countersunk hole 3a01 is set on the first surface 31. From this Figure 8 It can be seen that, compared with the comparative scheme, the scheme of the present invention can effectively reduce the power consumption of the compressor in working conditions 1 to 7. Among them, working conditions 1 to 7 are 7 commonly used working conditions for compressors. Figure 8 It can be seen from the difference ratio line in that under working condition 1, the power consumption of the compressor of the scheme of the present invention is reduced by 0.47% relative to the comparative scheme; under working condition 2, the power consumption of the compressor of the scheme of the present invention is reduced by 0.13% relative to the comparative scheme; under working condition 3, the power consumption of the compressor of the scheme of the present invention is reduced by 0.04% relative to the comparative scheme; under working condition 4, the power consumption of the compressor of the scheme of the present invention is reduced by 0.19% relative to the comparative scheme; under working condition 5, the power consumption of the compressor of the scheme of the present invention is reduced by 0.54% relative to the comparative scheme; under working condition 6, the power consumption of the compressor of the scheme of the present invention is reduced by 0.27% relative to the comparative scheme; under working condition 7, the power consumption of the compressor of the scheme of the present invention is reduced by 0.46% relative to the comparative scheme. In summary, it can be seen that the power consumption of the compressor of the scheme of the present invention is significantly reduced relative to the comparative scheme, and the reduction range is between 0.04% and 0.54%.

[0054] It should be noted that: when the opening 12a includes a countersunk hole group 120, and the number of the countersunk hole groups 120 is two or more, the countersunk hole groups 120 cooperate to form a countersunk hole structure, and the center line of the opening 12a is the center line of the countersunk hole structure.

[0055] like Figure 6 As shown, the present invention further provides a scroll compressor, which may include any of the above-mentioned fixed scroll disks 3. Among them, because the scroll compressor adopts the above-mentioned fixed scroll disk 3, since the first counterbore 3a01 is arranged in the first area 311, the first counterbore 3a01 is opposite to the pressure relief valve plate 12 when the pressure relief valve plate 12 is closed, so that the opening characteristics of the pressure relief valve plate 12 can be improved, and the pressure relief valve plate 12 can be opened more easily, thereby reducing the problem of untimely opening of the pressure relief valve plate 12 and improving the energy efficiency of the compressor.

[0056] like Figure 6As shown, the scroll compressor is mainly composed of a movable scroll 1, a housing 2, a fixed scroll 3, an upper bracket 4, a main bearing 5, a motor 6, a crankshaft 7, a secondary bearing 8, a lower cover 9, a cross ring 10, an upper cover 11, etc. The motor 6 is fixed to the housing 2 by cold pressing or shrink fitting, and the upper bracket 4 is connected to the housing 2 by welding. The fixed scroll 3 and the movable scroll 1 are oppositely installed on the upper bracket 4 with a phase angle difference of 180 degrees. Under the driving action of the crankshaft 7, the movable scroll 1 meshes with the fixed scroll 3 to form a series of crescent-shaped closed cavities that are isolated from each other and whose volumes gradually change.

[0057] When the scroll compressor is running, the motor 6 drives the crankshaft 7 to rotate. The top of the crankshaft 7 has an eccentric crank section at the contact point with the movable scroll 1. The eccentric crank section drives the movable scroll 1 to perform eccentric operation with a fixed rotation radius, and under the anti-rotation effect of the cross slip ring 10, the actual running path of the movable scroll 1 is a gyratory translation. The refrigerant entering from the outside of the scroll compressor is sucked into the crescent-shaped suction cavity formed by the fixed scroll 3 and the movable scroll 1, and then discharged from the exhaust port of the fixed scroll 3 into the closed cavity formed by the upper cover 11, the shell 2 and the lower cover 9, and then discharged from the scroll compressor through the exhaust copper pipe on the shell 2.

[0058] like Figure 1-2 As shown, in order to cope with some over-compression conditions, a connecting hole 301, a pressure relief hole 302 and a second countersunk hole 303 are usually opened on the static vortex 3, and one end of the pressure relief valve plate 12 and the pressure relief valve seat 13 are fixed to the static vortex 3 by screws. Under some over-compression conditions, the other end 122 of the pressure relief valve plate will be lifted up by the airflow of the pressure relief hole 302 until it hits the pressure relief valve seat 13. Among them, the pressure relief valve seat 13 can limit the pop-up height of the other end of the pressure relief valve plate 12. After the other end of the pressure relief valve plate 12 pops up, the pressure relief hole 302 is opened, which plays a role in early exhaust and improving energy efficiency.

[0059] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0060] 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 static vortex disk (3), characterized in that: The stationary scroll (3) has a first surface (31), a pressure relief hole group (300) is provided on the first surface (31), the pressure relief hole group (300) comprises a pressure relief hole (302) and a connecting hole (301), the connecting hole (301) is used to be connected to one end (121) of a pressure relief valve plate via a fastener (14), so that the other end (122) of the pressure relief valve plate opens and closes the pressure relief hole (302); The first surface (31) has a first area (311) located between the pressure relief hole (302) and the connecting hole (301), and the first area (311) is opposite to the pressure relief valve plate (12) when the pressure relief valve plate (12) is closed; Wherein, the pressure relief hole group (300) further includes a first countersunk hole (3a01) arranged on the first area (311).

2. The static scroll (3) according to claim 1, characterized in that: The pressure relief hole group (300) further comprises a second countersunk hole (303); the number of the pressure relief holes (302) is more than two and all are arranged in the second countersunk hole (303); the other end (122) of the pressure relief valve plate opens and closes each of the pressure relief holes (302) by opening and closing the second countersunk hole (303).

3. The static scroll (3) according to claim 2, characterized in that: The distance between the center lines of the connecting hole (301) and the second countersunk hole (303) is L1, and the distance between the center lines of the first countersunk hole (3a01) and the second countersunk hole (303) is L2, wherein L2=a*L1, a=1 / 3 to 2 / 3.

4. The stationary scroll (3) according to any one of claims 1 to 3, characterized in that: The number of the pressure relief hole groups (300) is more than two, and they are distributed at different positions on the first surface (31), and the number of the first areas (311) is equal to the number of the pressure relief hole groups (300), and they correspond one to one.

5. The stationary scroll (3) according to any one of claims 1 to 3, characterized in that: The pressure relief valve plate (12) has an opening (12a), and the opening (12a) is opposite to the first area (311) when the pressure relief valve plate (12) is closed.

6. The static scroll (3) according to claim 5, characterized in that: The opening (12a) is a round hole or a square hole; Alternatively, the opening (12a) comprises a countersunk hole group (120), the countersunk hole group (120) comprising a first strip countersunk hole (12a2) and a second strip countersunk hole (12a3) arranged in an eight-shaped shape, the first strip countersunk hole (12a2) and the second strip countersunk hole (12a3) being symmetrically arranged with respect to a central plane in the length direction of the pressure relief valve plate (12), and the small mouth end of the eight-shaped shape faces the other end (122) of the pressure relief valve plate, the end of the first strip countersunk hole (12a2) facing away from the second strip countersunk hole (12a3) passes through one side in the width direction of the pressure relief valve plate (12), and the end of the second strip countersunk hole (12a3) facing away from the first strip countersunk hole (12a2) passes through the other side in the width direction of the pressure relief valve plate (12).

7. The static scroll (3) according to claim 5, characterized in that: When the pressure relief valve plate (12) is closed, the distance between the center lines of the opening (12a) and the first counterbore (3a01) is L3, and the length of the pressure relief valve plate (12) is L, wherein L3=b*L, b=1 / 5-1 / 4.

8. A scroll compressor, characterized in that: It comprises the stationary scroll (3) according to any one of claims 1 to 7.

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