Scroll compressor and refrigeration equipment

Abstract

The invention relates to the technical field of compressors, and discloses a scroll compressor and refrigeration equipment, the scroll compressor comprises a static scroll plate and a partition plate, the upper end of the static scroll plate is provided with an exhaust port and an exhaust channel, and the exhaust port is arranged at the bottom of the exhaust channel; the partition plate is connected to the static vortex plate and covers the static vortex plate, the partition plate is provided with a silencing hole, the silencing hole is communicated with the exhaust channel, the equivalent diameter of the silencing hole is D, the diameter of the exhaust channel is D2, and the requirement that the diameter ratio of the silencing hole to the exhaust channel is limited, the circulation area of the silencing hole is small is met, on one hand, the acoustic impedance of the section can be increased, and on the other hand, the noise of the section can be reduced; propagation of high-frequency noise is reduced, and a good silencing effect on the high-frequency noise is achieved; and on the other hand, the flowing direction of the exhaust is changed, the pressure pulsation of the airflow is attenuated, the operation noise of the scroll compressor is reduced, and the product performance and the user experience are improved.

Description

Technical Field

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

[0002] Scroll compressors are widely used in refrigeration equipment such as air conditioners and heat pumps due to their high efficiency, small size, light weight and smooth operation. In scroll compressors, the scroll disk is the core component. The meshing of the contoured scrolls on the moving scroll disk and the stationary scroll disk forms a series of crescent-shaped compression chambers. As the moving scroll disk rotates eccentrically, the crescent-shaped compression chambers move from the periphery to the center, and the volume gradually decreases and the pressure gradually increases. Finally, the high-pressure refrigerant is discharged through the exhaust port of the stationary scroll disk to complete the compression process. Due to the pressure pulsation of the exhaust gas and the direct impact on the shell of the scroll compressor, high-frequency noise is generated, which affects product performance and user experience. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a scroll compressor, which can effectively improve the noise problem by providing a muffler hole.

[0004] The present invention also provides a refrigeration device having the scroll compressor.

[0005] According to a first aspect of the present invention, a scroll compressor comprises a fixed scroll and a partition plate, wherein an exhaust port and an exhaust passage are arranged at the upper end of the fixed scroll, wherein the exhaust port is arranged at the bottom of the exhaust passage; the partition plate is connected to the fixed scroll and is covered above the fixed scroll, wherein the partition plate is provided with a muffler hole, wherein the muffler hole is connected to the exhaust passage, wherein the equivalent diameter of the muffler hole is D, and the diameter of the exhaust passage is D 2 ,satisfy:

[0006] The pump body assembly according to the first aspect of the present invention has at least the following beneficial effects:

[0007] The scroll compressor discharges high-pressure refrigerant from the exhaust port. The high-pressure refrigerant passes through the exhaust channel and then through the silencer hole set on the partition plate. By limiting the diameter ratio of the silencer hole and the exhaust channel, the flow area of ​​the silencer hole is smaller. On the one hand, it can increase the acoustic impedance of the cross-section and reduce the propagation of high-frequency noise, and has a good silencing effect on high-frequency noise; on the other hand, it changes the flow direction of the exhaust gas and has an attenuation effect on the pressure pulsation of the airflow, which helps to reduce the operating noise of the scroll compressor and improve product performance and user experience.

[0008] According to some embodiments of the first aspect of the present invention, the diameter of the exhaust port is D 1 ,satisfy:

[0009] According to some embodiments of the first aspect of the present invention, the axial length of the muffler hole is H, satisfying:

[0010] According to some embodiments of the first aspect of the present invention, along the axial direction of the exhaust passage, the distance between the muffler hole and the exhaust port is L, which satisfies:

[0011] According to some embodiments of the first aspect of the present invention, the axial length of the exhaust passage is H 1 , satisfying: H 1 >D.

[0012] According to some embodiments of the first aspect of the present invention, a check valve is arranged in the exhaust channel, the check valve includes a valve seat and a piston valve column, the valve seat is connected to the static vortex disk, a guide inner hole is arranged in the valve seat for guiding the movement of the piston valve column, and the silencer hole is located above the valve seat.

[0013] According to some embodiments of the first aspect of the present invention, the axis of the valve seat coincides with the axis of the muffler hole, and the cross-sectional area of ​​the valve seat is larger than the cross-sectional area of ​​the muffler hole.

[0014] According to some embodiments of the first aspect of the present invention, the static vortex includes a back pressure plate, which is arranged on a side of the static vortex close to the partition plate, the exhaust channel is arranged inside the back pressure plate, and the valve seat is arranged in the exhaust channel.

[0015] According to some embodiments of the first aspect of the present invention, a pressure relief valve plate and a limiter are provided in the exhaust passage, the pressure relief valve plate is connected to the static vortex and covers the exhaust port, the limiter is connected to the static vortex and is located above the pressure relief valve plate, and the silencer hole is located above the limiter.

[0016] According to some embodiments of the first aspect of the present invention, at least one of the exhaust port and the muffler hole is offset from an axis of the exhaust passage.

[0017] According to some embodiments of the first aspect of the present invention, the cross-sectional shape of the muffler hole is circular, square or waist-shaped.

[0018] According to an embodiment of the second aspect of the present invention, a refrigeration device is provided, comprising the scroll compressor described in the embodiment of the first aspect.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 It is a schematic diagram of the structure of a scroll compressor of some embodiments of the first aspect of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure of the connection between the middle static vortex, the partition plate and the upper cover;

[0023] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0024] Figure 4 It is a schematic structural diagram of the connection between the static scroll, the partition plate and the upper cover in other embodiments of the first aspect of the present invention;

[0025] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0026] Figure 6 for Figure 4 A schematic diagram of the flow direction of exhaust gas in an embodiment of the present invention;

[0027] Figure 7 for Figure 1 A top view of the partition plate in FIG.

[0028] Figure 8 It is a schematic structural diagram of a scroll compressor of other embodiments of the first aspect of the present invention;

[0029] Fig. 9 for Figure 8 A schematic diagram of the structure of the connection between the middle static vortex, the partition plate and the upper cover;

[0030] Fig.10 for Fig. 9 A partial enlarged view of point C in the middle;

[0031] Fig.11 This is a noise and performance variable curve diagram of the scroll compressor according to the first embodiment of the present invention.

[0032] The figures are as follows:

[0033] Shell assembly 100, upper cover 110, exhaust pipe 111, cylinder 120, base 130;

[0034] Motor assembly 200, rotating shaft 210;

[0035] Compression assembly 300, movable scroll 310, fixed scroll 320, exhaust port 321, exhaust channel 322, partition plate 330, silencer hole 331, small hole 332, check valve 340, valve seat 341, piston valve column 342, back pressure plate 350, pressure relief valve plate 361, and limiter 362. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Refrigeration equipment relies on the refrigeration system to produce cold air to achieve the purpose of cooling. The compressor is the power component of the refrigeration system. The compressor drives the refrigerant to circulate and flow to achieve continuous refrigeration. Among them, the scroll compressor compresses the refrigerant by using the cooperation of the movable scroll and the fixed scroll. The scroll lines on the movable scroll and the fixed scroll mesh with each other to form a series of crescent-shaped compression chambers. With the eccentric rotation of the movable scroll, the crescent-shaped compression chamber moves continuously from the periphery to the center, and the volume gradually decreases, so that the pressure of the refrigerant therein gradually increases, and finally a high-pressure refrigerant is obtained. The high-pressure refrigerant is discharged through the exhaust port of the fixed scroll to complete the compression process.

[0041] The refrigerant discharged from the exhaust port of the static scroll has pressure pulsation. The exhaust gas passes through the through hole opened in the partition plate. Due to the large flow area of ​​the through hole, the exhaust gas directly impacts the shell of the scroll compressor, which can easily cause high-frequency noise and affect the performance of the scroll compressor and user experience.

[0042] To this end, an embodiment of the first aspect of the present invention proposes a scroll compressor, which can effectively reduce the impact of exhaust gas pulsation and reduce noise by setting a silencer hole with a small flow area on the partition plate.

[0043] like Figures 1 to 5 As shown, an embodiment of the first aspect of the present invention proposes a scroll compressor, which includes a shell assembly 100, a motor assembly 200 and a compression assembly 300. The shell assembly 100 includes an upper cover 110, a cylinder 120 and a base 130. The upper cover 110 and the base 130 are fixed at the upper and lower ends of the cylinder 120 to form an accommodating cavity. The motor assembly 200 and the compression assembly 300 are arranged in the accommodating cavity. The compression assembly 300 includes a movable scroll 310 and a fixed scroll 320. The movable scroll 310 is connected to the rotating shaft 210 of the motor assembly 200. The motor assembly 200 is fixed on the inner wall of the cylinder 120 and is driven by the rotating shaft 210 of the motor assembly 200 to eccentrically rotate. The movable scroll 310 and the fixed scroll 320 cooperate to complete the compression of the refrigerant. An exhaust port 321 and an exhaust passage 322 are provided at the upper end of the static vortex 320. The exhaust port 321 is provided at the bottom of the exhaust passage 322. The compressed refrigerant enters the exhaust passage 322 through the exhaust port 321. The static vortex 320 is connected to a partition plate 330, and the partition plate 330 is covered above the static vortex 320. The upper cover 110 is covered above the partition plate 330. The upper cover 110 is provided with an exhaust pipe 111 to output high-pressure refrigerant. A muffler hole 331 is provided on the partition plate 330, and the muffler hole 331 is connected to the exhaust passage 322. Figure 3 As shown, the equivalent diameter of the muffler hole 331 is defined as D, and the diameter of the exhaust passage 322 is defined as D 2 , the design meets:

[0044] When the scroll compressor is running, high-pressure refrigerant is discharged from the exhaust port 321 of the fixed scroll 320, and the high-pressure refrigerant enters the exhaust passage 322. Since the exhaust passage 322 has a large diameter, it has an expansion and silencing effect. Then, the refrigerant enters the silencing hole 331 provided on the partition plate 330. Due to the design limitation, By limiting the diameter ratio of the silencer hole 331 and the exhaust passage 322, the flow area of ​​the silencer hole 331 is small, which can increase the acoustic impedance of the cross section and reduce the propagation of high-frequency noise (shorter wavelength), thus having a good silencing effect on high-frequency noise; Figure 6 As shown, on the other hand, the refrigerant airflow changes its flow direction, and the high-frequency noise collides with the inner wall of the exhaust channel 322 and the partition plate 330, which can reduce the propagation of the high-frequency noise. In addition, the partition plate 330 has an attenuation effect on the pressure pulsation of the refrigerant, which helps to reduce the operating noise of the scroll compressor and improve product performance and user experience.

[0045] Reference Fig.11 , where the OA curve represents noise in dB, and the COP curve represents performance improvement in pts. The variables brought about by different apertures of the silencer hole 331 are shown in the figure. Therefore, the embodiment of the present invention can effectively improve the noise and performance of the scroll compressor by limiting the silencer hole 331 on the partition plate 330.

[0046] It can be understood that the equivalent diameter of the silencer hole 331 is defined as D. When the silencer hole 331 is a circular hole, the equivalent diameter is the diameter of the circular hole; when the silencer hole 331 is a non-circular hole, the equivalent diameter is Wherein, A is the cross-sectional area of ​​the muffler hole 331 .

[0047] It is understood that the diameter of the exhaust port 321 is defined as D 1 , the design also meets: That is to satisfy simultaneously: and The equivalent diameter of the silencer hole 331 is significantly smaller than the diameter of the exhaust passage 322, so that the exhaust changes its flow direction and increases the acoustic impedance, helping to reduce noise. The equivalent diameter of the silencer hole 331 is larger than the diameter of the exhaust port 321 in order to meet the exhaust volume requirements and prevent affecting the exhaust of the scroll compressor, which helps to improve the performance of the scroll compressor.

[0048] It is understandable that, referring to Figure 3 , the axial length of the silencer hole 331 is defined as H, which satisfies the following design requirements: Since the silencing effect of the silencing hole 331 is affected by the equivalent diameter and the axial length, the smaller the equivalent diameter and the larger the axial length, the better the effect, but at the same time it will affect the exhaust efficiency. Therefore, the equivalent diameter and the axial length should be limited to a certain range, and the design is limited by: It can not only achieve better silencing effect, but also meet the exhaust requirements without affecting the exhaust volume.

[0049] It is understandable that, referring to Figure 3 , along the axial direction of the exhaust passage 322, the distance between the muffler hole 331 and the exhaust port 321 is L, which satisfies the following design requirements: By limiting the distance between the silencer hole 331 and the exhaust port 321, the refrigerant discharged from the exhaust port 321 must first move in the exhaust passage 322. Since the diameter of the exhaust passage 322 is relatively large, it has the effect of expansion and silencing. In addition, limiting the distance between the silencer hole 331 and the exhaust port 321 prevents the refrigerant from being directly discharged from the silencer hole 331, which has a better silencing effect.

[0050] It is understandable that, referring to Figure 3, the axial length of the exhaust passage 322 is defined as H 1 , the design meets: H 1 >D, by limiting the axial length of the exhaust channel 322 to be greater than the equivalent diameter of the silencer hole 331, the refrigerant discharged from the exhaust port 321 must first diffuse and move in the exhaust channel 322, which has the effect of expansion and silencer, and prevents the refrigerant from quickly reaching the silencer hole 331, thereby having a better silencer effect.

[0051] Reference Figure 2 and Figure 3 In some embodiments, the scroll compressor is provided with a check valve 340 in the exhaust passage 322. The check valve 340 includes a fixed valve seat 341 and a movable piston valve column 342. The valve seat 340 is fixedly connected to the fixed scroll 320. A guide inner hole for guiding the movement of the piston valve column 342 is provided in the valve seat 341. The piston valve column 342 can move in the guide inner hole. When exhausting, the refrigerant gas pushes up the piston valve column 342 and then flows into the exhaust passage 322. The muffler hole 331 is located above the valve seat 341. Finally, the refrigerant gas is discharged from the muffler hole 331. The function of the check valve 340 is to prevent the refrigerant from flowing back and to prevent the refrigerant from starting the movable scroll 310 to reverse and damage the motor assembly 200.

[0052] Reference Figure 2 and Figure 3 The static vortex 320 includes a back pressure plate 350, which is arranged on one side of the static vortex 320 close to the partition plate 330. The exhaust passage 322 and the valve seat 341 are both arranged on the back pressure plate 350. Since the valve seat 341 covers the piston valve column 342, during assembly, the piston valve column 342 is first installed into the guide inner hole of the valve seat 341, and then the valve seat 341 is installed on the static vortex 320, which simplifies the structure and assembly and improves production efficiency.

[0053] like Figure 3 As shown, the axis of the valve seat 341 coincides with the axis of the silencer hole 331, and the cross-sectional area of ​​the valve seat 341 is larger than the cross-sectional area of ​​the silencer hole 331. The refrigerant discharged from the exhaust port 321 is blocked by the valve seat 341 and must bypass the valve seat 341 and then turn to enter the silencer hole 331. By changing the flow direction of the refrigerant airflow, the propagation of high-frequency noise is reduced. In addition, the valve seat 341 and the partition plate 330 have an attenuation effect on the pressure pulsation of the refrigerant, which helps to reduce the operating noise of the scroll compressor.

[0054] Reference Figure 4 and Figure 5In other embodiments, the scroll compressor is provided with a pressure relief valve plate 361 and a stopper 362 in the exhaust passage 322. One end of the pressure relief valve plate 361 is fixedly connected to the fixed scroll 320, and the other end covers the exhaust port 321. The pressure relief valve plate 361 is used to close the exhaust port 321. When the compression assembly 300 completes the compression of the refrigerant once, the high-pressure refrigerant can lift the pressure relief valve plate 361 for exhaust. The function of the stopper 362 is to limit the lift of the valve plate, prevent the pressure relief valve plate 361 from excessive deformation, and protect the pressure relief valve plate 361. Therefore, the stopper 362 is connected to the fixed scroll 320 and is located above the pressure relief valve plate 361. The silencer hole 331 is located above the stopper 362. When exhausting, the refrigerant gas lifts the pressure relief valve plate 361, and then flows into the exhaust passage 322. Finally, the refrigerant gas is discharged from the silencer hole 331. The pressure relief valve plate 361 can also prevent the refrigerant from flowing back and driving the movable scroll 310 to reverse and damage the motor assembly 200 .

[0055] It is understandable that at least one of the exhaust port 321 and the muffler hole 331 deviates from the axis of the exhaust channel 322, which can cause the exhaust airflow to deflect in direction. Alternatively, both the exhaust port 321 and the muffler hole 331 deviate from the axis of the exhaust channel 322, and the exhaust port 321 is distributed on one side of the axis of the exhaust channel 322, while the muffler hole 331 is distributed on the other side of the axis of the exhaust channel 322. The refrigerant discharged from the exhaust port 321 enters the exhaust channel 322, needs to bypass the stopper 362 and flow to the muffler hole 331 on the other side of the exhaust channel 322, and changes the flow direction of the refrigerant multiple times, which is conducive to reducing pressure pulsation.

[0056] According to some embodiments of the first aspect of the present invention, the cross-sectional shape of the muffler hole 331 is usually circular, which is easy to process and has a large flow area. Of course, the muffler hole 331 can also adopt a non-circular cross-section, such as designing the cross-sectional shape of the muffler hole 331 to be square or waist-shaped, etc., which can meet the requirements of muffler and exhaust.

[0057] The embodiment of the second aspect of the present invention proposes a refrigeration device, the refrigeration device has a refrigeration system, the refrigeration system includes a scroll compressor, a condenser, a throttling device and an evaporator of the first aspect embodiment connected in sequence through pipelines, and the scroll compressor, the condenser, the throttling device and the evaporator form a circulation path of the refrigerant through the pipeline. When the refrigeration device is running, the scroll compressor compresses the sucked refrigerant gas, and then inputs the high-temperature and high-pressure refrigerant obtained after compression into the condenser, and the refrigerant is cooled by the condenser. The refrigerant output by the condenser enters the throttling device, and the throttling device plays a role of throttling and reducing pressure, further reducing the temperature and pressure of the refrigerant, so that the refrigerant entering the evaporator becomes a low-pressure liquid with a lower saturation temperature. The refrigerant evaporates in the evaporator and absorbs the heat of the air, thereby producing cold air, and the cold air is input into the use space to help cool down. The refrigerant output by the evaporator returns to the scroll compressor to complete a cycle, and the scroll compressor continues to operate to provide power for the refrigerant, driving the refrigerant to circulate and flow, and continuously refrigerate.

[0058] The scroll compressor includes a shell assembly 100, a motor assembly 200 and a compression assembly 300. The shell assembly 100 includes an upper cover 110, a cylinder 120 and a base 130. The upper cover 110 and the base 130 are fixed at the upper and lower ends of the cylinder 120 to form an accommodating cavity. The motor assembly 200 and the compression assembly 300 are arranged in the accommodating cavity. The compression assembly 300 includes a movable scroll 310 and a fixed scroll 320. The movable scroll 310 is connected to the rotating shaft 210 of the motor assembly 200. The motor assembly 200 is fixed on the inner wall of the cylinder 120 and is driven by the rotating shaft 210 of the motor assembly 200 to eccentrically rotate. The movable scroll 310 and the fixed scroll 320 cooperate to complete the compression of the refrigerant. An exhaust port 321 and an exhaust passage 322 are provided at the upper end of the static vortex 320. The exhaust port 321 is provided at the bottom of the exhaust passage 322. The compressed refrigerant enters the exhaust passage 322 through the exhaust port 321. The static vortex 320 is connected to a partition plate 330, and the partition plate 330 is covered above the static vortex 320. The upper cover 110 is covered above the partition plate 330. The upper cover 110 is provided with an exhaust pipe 111 to output high-pressure refrigerant. A muffler hole 331 is provided on the partition plate 330, and the muffler hole 331 is connected to the exhaust passage 322. Figure 3 As shown, the equivalent diameter of the muffler hole 331 is defined as D, and the diameter of the exhaust passage 322 is defined as D 2 , the design meets:

[0059] When the scroll compressor is running, high-pressure refrigerant is discharged from the exhaust port 321 of the fixed scroll 320, and the high-pressure refrigerant enters the exhaust passage 322. Since the exhaust passage 322 has a large diameter, it has an expansion and silencing effect. Then, the refrigerant enters the silencing hole 331 provided on the partition plate 330. Due to the design limitation, By limiting the diameter ratio of the silencer hole 331 and the exhaust passage 322, the flow area of ​​the silencer hole 331 is small, which can increase the acoustic impedance of the cross section and reduce the propagation of high-frequency noise (shorter wavelength), thus having a good silencing effect on high-frequency noise; Figure 6 As shown, on the other hand, the refrigerant airflow changes its flow direction, and the high-frequency noise collides with the inner wall of the exhaust channel 322 and the partition plate 330, which can reduce the propagation of the high-frequency noise. In addition, the partition plate 330 has an attenuation effect on the pressure pulsation of the refrigerant, which helps to reduce the operating noise of the scroll compressor and improve product performance and user experience.

[0060] like Figures 8 to 10 As shown, some other embodiments of the first aspect of the present invention provide a scroll compressor, wherein a partition plate 330 of the scroll compressor is provided with a plurality of small holes 332 , and the plurality of small holes 332 correspond to the exhaust passage 322 , and the plurality of small holes 332 are located above the exhaust passage 322 .

[0061] When the scroll compressor is in operation, the movable scroll 310 and the stationary scroll 320 of the compression assembly 300 cooperate to compress the refrigerant to obtain high-pressure refrigerant. The high-pressure refrigerant is discharged from the exhaust port 321, passes through the exhaust channel 322, and then passes through the multiple small holes 332 set on the partition plate 330. The small holes 332 are used to suppress the airflow pulsation impact caused by the exhaust and reduce noise, which helps to reduce the operating noise of the scroll compressor and improve product performance and user experience.

[0062] It is understandable that the refrigerant will be dispersed into multiple small airflows through the multiple small holes 332, so that the resistance encountered by the refrigerant when flowing is increased, thereby achieving the effect of reducing noise. In addition, there is a large space between the partition plate 330 and the upper cover 110, and the small airflow enters the large space and diffuses quickly, which is conducive to reducing the impact on the upper cover 110 and reducing noise.

[0063] It can be understood that the multiple small holes 332 can fall within the cross-section of the exhaust channel 322, or can exceed the cross-section of the exhaust channel 322. The refrigerant passing through the exhaust channel 322 enters the multiple small holes 332, which can meet the exhaust requirements, allowing the refrigerant to enter between the partition plate 330 and the upper cover 110, and then be output through the exhaust pipe set in the upper cover 110.

[0064] It is understandable that the multiple small holes 332 may have the same cross-sectional area. The multiple small holes 332 may also have different cross-sectional areas, such as the cross-sectional areas of each small hole 332 are different, or the cross-sectional areas of some small holes 332 are the same, while the small holes 332 of another part have other cross-sectional areas. Among them, the cross-sectional area of ​​the small hole 332 may include two specifications, three specifications or a greater number of specifications. Using multiple small holes 332 with cross-sectional areas of multiple specifications can eliminate noise of multiple frequencies, which is more conducive to reducing the operating noise of the scroll compressor. The cross-sectional area and number of the multiple small holes 332 can be designed according to the exhaust detection data of the scroll compressor.

[0065] The equivalent diameter of the small hole 332 is defined as D. It can be understood that when the small hole 332 is a circular hole, Among them, d i is the diameter of the small hole 332, n i is the number of the corresponding small holes 332, where i is the number of different apertures, i = 1, 2, 3...k; when the small hole 332 is a non-circular hole, then Among them, A i is the cross-sectional area of ​​the small hole 332, where i is the number of different hole diameters, i=1, 2, 3...k. Fig.10 , the diameter of the exhaust port 321 is defined as D 1 , the diameter of the exhaust passage 322 is D 2 , the design meets: as well as By limiting the value range of the equivalent diameter of the small hole 332, both the requirements of silencing and exhaust can be met, thereby preventing the performance of the scroll compressor from being reduced.

[0066] It is understandable that, referring to Fig.10 , the axial length of the small hole 332 is defined as H, which satisfies the following design requirements: Since the silencing effect of the small hole 332 is affected by the equivalent diameter and the axial length, the smaller the equivalent diameter and the larger the axial length, the better the effect, but at the same time it will affect the exhaust efficiency. Therefore, the equivalent diameter and the axial length should be limited to a certain range, and the design should meet the following requirements: It can not only achieve better silencing effect, but also meet the exhaust requirements without affecting the exhaust volume.

[0067] It is understandable that the number of small holes 332 also affects the silencing effect, and too few small holes 332 will also affect the exhaust efficiency, so the number of small holes 332 is N, which satisfies: 2≤N≤9, and D satisfies: D≥3.5mm. On the one hand, limiting the number of small holes 332, and on the other hand, limiting the minimum flow area of ​​small holes 332, can achieve a better silencing effect and meet the exhaust requirements.

[0068] It is understandable that there are many ways to arrange the multiple small holes 332, among which the multiple small holes 332 are distributed at intervals around the circumference of the exhaust passage 322, such as being distributed at equal intervals in a ring shape, and the multiple small holes 332 are arranged more closely, which can achieve a better silencing effect and meet the exhaust requirements without affecting the exhaust volume. In addition, the multiple small holes 332 can also be distributed at intervals around the circumference of the exhaust passage 322, and the distance between each small hole 332 and the axis of the exhaust passage 322 is unequal, and the spacing between two adjacent small holes 332 is equal or unequal. Alternatively, the multiple small holes 332 are distributed around the axis of the exhaust passage 322 in two rows, three rows, or more rows.

[0069] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A scroll compressor, characterized in that: include: A stationary vortex disk, wherein an exhaust port and an exhaust passage are arranged at the upper end of the stationary vortex disk, and the exhaust port is arranged at the bottom of the exhaust passage; A partition plate is connected to the static vortex disk and is disposed above the static vortex disk. The partition plate is provided with a silencer hole, the silencer hole is connected to the exhaust passage, the equivalent diameter of the silencer hole is D, and the diameter of the exhaust passage is D2, satisfying:

2. The scroll compressor according to claim 1, characterized in that: The diameter of the exhaust port is D1, which satisfies:

3. The scroll compressor according to claim 1, characterized in that: The axial length of the muffler hole is H, which satisfies:

4. The scroll compressor according to claim 3, characterized in that: Along the axial direction of the exhaust passage, the distance between the muffler hole and the exhaust port is L, which satisfies:

5. The scroll compressor according to claim 1, characterized in that: The axial length of the exhaust passage is H1, which satisfies: H1>D.

6. The scroll compressor according to any one of claims 1 to 5, characterized in that: A check valve is arranged in the exhaust passage, and the check valve includes a valve seat and a piston valve column. The valve seat is connected to the static vortex disk, and a guide inner hole for guiding the movement of the piston valve column is arranged in the valve seat. The silencer hole is located above the valve seat.

7. The scroll compressor according to claim 6, characterized in that: The axis of the valve seat coincides with the axis of the muffler hole, and the cross-sectional area of ​​the valve seat is larger than the cross-sectional area of ​​the muffler hole.

8. The scroll compressor according to claim 6, characterized in that: The fixed scroll includes a back pressure plate, which is arranged on a side of the fixed scroll close to the partition plate. The exhaust passage is arranged inside the back pressure plate, and the valve seat is arranged in the exhaust passage.

9. The scroll compressor according to any one of claims 1 to 5, characterized in that: A pressure relief valve plate and a limiter are provided in the exhaust passage. The pressure relief valve plate is connected to the static vortex and covers the exhaust port. The limiter is connected to the static vortex and is located above the pressure relief valve plate. The silencer hole is located above the limiter.

10. The scroll compressor according to claim 9, characterized in that: At least one of the exhaust port and the muffler hole is offset from an axis of the exhaust passage.

11. The scroll compressor according to claim 1, characterized in that: The cross-sectional shape of the muffler hole is circular, square or waist-shaped.

12. Refrigeration equipment, characterized in that The invention comprises a scroll compressor as claimed in any one of claims 1 to 11.

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