Liquid accumulator

Abstract

The utility model relates to the technical field of liquid storage, in particular to a liquid storage device. The liquid storage device comprises a barrel and a silencing plate, the silencing plate is installed in the barrel and comprises a bottom plate and a side plate, the side plate is arranged on the peripheral side of the bottom plate in a surrounding mode and connected with the bottom plate, and in the axial direction of the barrel, the side plate gradually expands from the end close to the bottom plate to the end away from the bottom plate. Wherein a first through hole is formed in the side plate, a second through hole is formed in the bottom plate, the first through hole penetrates through the two opposite end faces of the side plate in the thickness direction of the side plate, and the second through hole penetrates through the two opposite end faces of the bottom plate in the thickness direction of the bottom plate. According to the liquid storage device provided by the invention, the problem that the noise reduction effect of a flat plate type noise reduction plate in an existing liquid storage device is poor is solved.

Description

Technical Field

[0001] The present application relates to the field of liquid storage technology, and in particular to a liquid reservoir. Background Art

[0002] An air conditioning system is often equipped with a liquid accumulator, which is used to store liquid refrigerant and refrigeration oil entering the liquid accumulator, thereby balancing and stabilizing the refrigerant flow in the system.

[0003] In related art, because the refrigerant flow rate into the accumulator is typically high, when the high-speed refrigerant impacts the internal components of the accumulator, it causes vibration and noise. Therefore, a muffler is often installed in the accumulator to slow the refrigerant flow rate and disperse the refrigerant pressure, thereby reducing noise generation. However, current mufflers are often simple flat-plate structures. Due to their weak structural strength, flat-plate mufflers are prone to resonance and noise when impacted by refrigerant, and thus fail to effectively reduce noise. Utility Model Content

[0004] Based on this, it is necessary to provide a liquid reservoir to solve the problem of poor noise reduction effect of the flat-plate silencer in the existing liquid reservoir.

[0005] The present application provides a liquid reservoir, which includes a cylinder and a silencer, wherein the silencer is installed in the cylinder, and the silencer includes a bottom plate and a side plate, wherein the side plate is arranged around the circumference of the bottom plate and is connected to the bottom plate, and along the axial direction of the cylinder, the side plate tends to gradually expand from one end close to the bottom plate to the end away from the bottom plate; wherein a first through hole is provided on the side plate, and a second through hole is provided on the bottom plate, the first through hole passes through the opposite end surfaces of the side plate along its own thickness direction, and the second through hole passes through the opposite end surfaces of the bottom plate along its own thickness direction.

[0006] In one embodiment, along the axial direction of the cylinder, there are multiple first through holes, and the multiple first through holes are distributed on the side plate at intervals along the circumference of the cylinder; and / or, there are multiple second through holes, and the multiple second through holes are distributed on the bottom plate at intervals along the circumference of the cylinder.

[0007] In one embodiment, along the axial direction of the cylinder, the vertical distance between the two ends of the side plate is L, wherein 10mm≤L≤20mm; and / or, the acute angle formed by the side plate and the bottom plate is A, wherein 40°≤A≤70°.

[0008] In one embodiment, the silencer plate further includes a connecting plate, which is provided at one end of the side plate away from the bottom plate and connected to the side plate; wherein the connecting plate is connected to the inner wall of the cylinder; the liquid reservoir further includes an air outlet pipe, one end of the air outlet pipe is inserted into the cylinder and connected to the cylinder, and the other end of the air outlet pipe extends out of the cylinder; a mounting hole is provided on the bottom plate, and the air outlet pipe passes through the mounting hole and is connected to the bottom plate.

[0009] In one embodiment, the inner wall of the cylinder protrudes in a direction close to its own axis to form a limiting portion. When the silencer plate is installed in the cylinder, the limiting portion stops at both ends of the connecting plate along the axial direction; or, when the silencer plate is installed in the cylinder, the outer wall of the connecting plate and the inner wall of the cylinder are interference fit.

[0010] In one embodiment, an air inlet is provided at one end of the cylinder, and an opening is formed at one end of the silencer away from the bottom plate; when the silencer is installed in the cylinder, the opening is arranged in a direction close to or away from the air inlet.

[0011] In one embodiment, there are two silencer plates, and the openings of the two silencer plates are oriented in opposite directions; wherein the bottom plates of the two silencer plates abut against each other in the axial direction, or the two silencer plates share one bottom plate, or the connecting plate of one silencer plate abuts against the connecting plate of the other silencer plate, or the two silencer plates share one connecting plate.

[0012] In one embodiment, a flange is provided on the bottom plate, and the flange is arranged around the circumference of the mounting hole, and the flange extends in a direction close to or away from the opening; when the silencer is installed in the cylinder, the extension direction of the flange is the same as the insertion direction of the exhaust pipe.

[0013] In one embodiment, the height of the flange protruding from the bottom plate is H, wherein 2mm≤H≤4mm.

[0014] In one embodiment, the cylinder includes a main body, a first cover body, and a second cover body that are separately arranged, and the first cover body and the second cover body are respectively connected to the opposite ends of the main body along the axial direction; or, the cylinder is an integrated structure.

[0015] Compared with the prior art, the liquid accumulator provided by the present application has a side plate that can form a conical flow-guiding structure. When the refrigerant impacts the side plate, the refrigerant can flow along the surface of the side plate. Under the guiding effect of the side plate, the flow rate of the refrigerant can be effectively slowed down, thereby reducing the impact force of the refrigerant and reducing the vibration amplitude of the liquid accumulator accordingly, thereby reducing the generation of noise. On the other hand, by extending the side plate, the area of ​​the bottom plate is reduced in disguise, and the overall structural strength is improved under the condition of unchanged overall thickness, thereby improving the anti-resonance performance and helping to reduce noise. In addition, by opening a first through hole in the side plate and a second through hole in the bottom plate, not only can the circulation of the refrigerant be achieved, but the resistance to the refrigerant flow can be reduced when the refrigerant flows through the first through hole and the second through hole, which is conducive to further improving the noise reduction effect. At the same time, the second through hole can also prevent the refrigerant from accumulating on the bottom plate, thereby improving the utilization rate of the refrigerant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a sound-absorbing plate according to an embodiment of the present application;

[0018] Figure 2 A front view of a sound-absorbing panel according to an embodiment of the present application;

[0019] Figure 3 A top view of a sound-absorbing plate according to an embodiment of the present application;

[0020] Figure 4 A cross-sectional view of a liquid reservoir according to an embodiment of the present application;

[0021] Figure 5 A cross-sectional view of a liquid reservoir according to another embodiment of the present application;

[0022] Figure 6 A cross-sectional view of a liquid reservoir according to another embodiment of the present application;

[0023] Figure 7 A cross-sectional view of a liquid reservoir according to another embodiment of the present application;

[0024] Figure 8 This is a cross-sectional view of a cylinder according to an embodiment of the present application.

[0025] The symbols in the figure mean the following:

[0026] 100. Liquid reservoir; 10. Cylinder; 101. Air inlet; 102. Air outlet; 11. Main body; 12. First cover body; 13. Second cover body; 14. Limiting portion; 20. Silencer; 201. First through hole; 202. Second through hole; 203. Mounting hole; 204. Opening; 21. Bottom plate; 211. Flange; 22. Side plate; 23. Connecting plate; 30. Air outlet pipe; 40. Air inlet pipe. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0028] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0030] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, a first feature being “above,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0032] An air conditioning system is often equipped with a liquid accumulator, which is used to store liquid refrigerant and refrigeration oil entering the liquid accumulator, thereby balancing and stabilizing the refrigerant flow in the system.

[0033] In related art, because the refrigerant flow rate into the accumulator is typically high, when the high-speed refrigerant impacts the internal components of the accumulator, it causes vibration and noise. Therefore, a muffler is often installed in the accumulator to slow the refrigerant flow rate and disperse the refrigerant pressure, thereby reducing noise generation. However, current mufflers are often simple flat-plate structures. Due to their weak structural strength, flat-plate mufflers are prone to resonance and noise when impacted by refrigerant, and thus fail to effectively reduce noise.

[0034] See also Figures 1-8 To address the problem of poor noise reduction performance of flat-plate silencers in existing liquid reservoirs, the present application provides a liquid reservoir 100, which includes a cylinder 10 and a silencer 20. The silencer 20 is installed within the cylinder 10 and includes a bottom plate 21 and a side plate 22. The side plate 22 surrounds and is connected to the bottom plate 21. Furthermore, along the axial direction of the cylinder 10, the side plate 22 gradually expands from an end close to the bottom plate 21 to an end away from the bottom plate 21. A first through hole 201 is formed in the side plate 22, and a second through hole 202 is formed in the bottom plate 21. The first through hole 201 penetrates opposite end surfaces of the side plate 22 along its thickness direction, and the second through hole 202 penetrates opposite end surfaces of the bottom plate 21 along its thickness direction. Furthermore, the first through hole 201 and the second through hole 202 are both used for circulation of refrigerant.

[0035] It is understood that in the muffler plate 20 provided in the present application, the side plate 22 can form a conical flow-guiding structure. When the refrigerant impacts the side plate 22, the refrigerant can flow along the surface of the side plate 22. Due to the guiding effect of the side plate 22, the flow rate of the refrigerant can be effectively slowed, thereby reducing the impact force of the refrigerant and correspondingly reducing the vibration amplitude of the liquid accumulator 100, thereby reducing the generation of noise. On the other hand, the extension of the side plate 22 reduces the area of ​​the bottom plate 21 in a disguised manner, improving the overall structural strength while maintaining the same overall thickness, thereby improving the anti-resonance performance and facilitating noise reduction. Furthermore, by providing the first through hole 201 in the side plate 22 and the second through hole 202 in the bottom plate 21, not only can the refrigerant flow be achieved, but the resistance to the refrigerant flow can also be reduced when the refrigerant flows through the first through hole 201 and the second through hole 202, which further enhances the noise reduction effect. At the same time, the second through holes 202 can also prevent the refrigerant from accumulating on the bottom plate 21, thereby improving the utilization rate of the refrigerant.

[0036] Furthermore, there are multiple first through holes 201, which are spaced apart on the side plate 22 along the circumference of the cylinder 10. Similarly, there are multiple second through holes 202, which are spaced apart on the bottom plate 21 along the circumference of the cylinder 10. This improves the refrigerant flow performance.

[0037] Specifically, the number of the first through holes 201 and the second through holes 202 is preferably set to 4-8. Figure 3 As shown, there are six first through holes 201 and six second through holes 202. Of course, in other embodiments, four, five, seven or eight through holes may be provided, and the number may be reasonably set according to actual needs.

[0038] Furthermore, the first through hole 201 is preferably opened on the side plate 22 at a position close to the end of the refrigerant flow, so that the refrigerant can pass through the first through hole 201 after being fully guided by the side plate 22 .

[0039] In this embodiment, the first through hole 201 is an elliptical hole, with its major axis extending along the generatrix of the tapered side plate 22. Preferably, the sidewalls of the first through hole 201 are parallel to the axis of the cylinder 10, and the projection of the first through hole 201 along the axial direction of the cylinder 10 is circular. Furthermore, the second through hole 202 can be a circular hole. Thus, the first through hole 201 and the second through hole 202 can increase the refrigerant flow rate and further reduce flow resistance.

[0040] In one embodiment, if Figure 1As shown, the muffler plate 20 further includes a connecting plate 23, which is disposed at an end of the side plate 22 away from the bottom plate 21 and connected to the side plate 22. The connecting plate 23 is connected to the inner wall of the cylinder 10. This facilitates the connection between the muffler plate 20 and the cylinder 10 and improves the reliability of the connection between the two.

[0041] Specifically, when the silencer plate 20 is installed in the cylinder 10, the connection between the silencer plate 20 and the cylinder 10 can be achieved by the interference fit between the outer wall of the connecting plate 23 and the inner wall of the cylinder 10. Of course, an axial limit method can also be used. For example, the inner wall of the cylinder 10 protrudes in the direction close to its own axis to form a limit portion 14, and the limit portion 14 is stopped at both ends of the connecting plate 23 along the axial direction, so as to achieve the connection between the silencer plate 20 and the cylinder 10. Here, the limit portion 14 can be formed by the overall inward depression of the side wall of the cylinder 10. It can be a plurality of spaced-apart protrusion structures or a whole annular protrusion structure. In addition, a combination of axial limit and interference fit can also be used, which can be reasonably set according to the structure of the cylinder 10 to reduce the difficulty of installation.

[0042] For example, in the present application, the cylinder 10 can be configured as an integrated structure or a split structure. Figure 4 As shown, when the cylinder 10 is an integrated structure, since the cylinder 10 is formed as a whole by spinning, it is difficult to install the connecting plate 23 by interference fit. Therefore, the silencer 20 can be limited by the axial stop of the limiting portion 14.

[0043] like Figure 8 As shown, when the cylinder 10 is configured as a split structure, the cylinder 10 comprises a main body 11, a first cover 12, and a second cover 13, which are separately arranged. The first cover 12 and the second cover 13 are respectively connected to opposite ends of the main body 11 along the axial direction. In this way, the muffler plate 20 can be extended into the internal cavity through the end of the main body 11 and connected by interference fit, which simplifies processing. Of course, the muffler plate 20 can also be limited by the axial stop of the limiter 14.

[0044] like Figure 4 As shown, an air inlet 101 is formed at one end of the cylinder 10, and an air outlet 102 is formed at the other end. The liquid accumulator 100 further includes an air inlet pipe 40 and an air outlet pipe 30. The air inlet pipe 40 is disposed at the air inlet 101 and is connected to the cylinder 10. The air outlet pipe 30 is disposed at the air outlet 102, with one end of the air outlet pipe 30 inserted into and connected to the cylinder 10, and the other end of the air outlet pipe 30 extending out of the cylinder 10. Gas-liquid two-phase refrigerant enters the cylinder 10 through the air inlet pipe 40, and the separated gaseous refrigerant is discharged through the air outlet pipe 30, while the liquid refrigerant is stored in the cylinder 10, thereby improving the reliability of the compressor.

[0045] Since the side panels 22 are tapered as a whole, they can enclose a cavity with the bottom panel 21, and the cavity has an opening 204 formed at one end of the muffler panel 20 away from the bottom panel 21. Here, the opening 204 is specifically formed at the connecting plate 23 of the muffler panel 20.

[0046] In one embodiment, if Figure 4 As shown, when the silencer plate 20 is installed in the cylinder 10, the opening 204 is positioned toward the air inlet 101. Thus, when the refrigerant enters the cylinder 10 through the air inlet pipe 40, it preferentially impacts the inner surface of the side plate 22 and flows along the inner surface of the side plate 22, thereby reducing the impact of the refrigerant and thereby reducing noise. Part of the refrigerant flows through the first through-hole 201 to reduce the refrigerant pressure and flow resistance, while the remaining part is further buffered on the inner surface of the bottom plate 21, further reducing the refrigerant flow rate, and ultimately flows through the second through-hole 202.

[0047] In another embodiment, Figure 5 As shown, when the muffler plate 20 is installed in the cylinder 10, the opening 204 can also be arranged in a direction away from the air inlet 101. In this case, when the refrigerant enters the cylinder 10 through the air inlet pipe 40, it first impacts the outer surface of the bottom plate 21 and flows along the outer surface of the side plate 22. This can also reduce the refrigerant flow rate and alleviate the refrigerant impact, thereby reducing the generation of noise.

[0048] Furthermore, in one embodiment, there are two sound-absorbing panels 20 , and the openings 204 of the two sound-absorbing panels 20 face in opposite directions. By providing two sound-absorbing panels 20 , noise can be better eliminated.

[0049] Specifically, the installation of the two muffler panels 20 can be as follows: Figure 6 As shown, the positioning of the two silencers 20 is achieved by axially abutting the bottom plates 21 of the two silencers 20 against each other. At this time, the two silencers 20 are fixed to the cylinder 10 through the connecting plate 23, and the bottom plate 21 is supported by the side plate 22, which is conducive to improving the overall structural strength. When the refrigerant flows, it first flows through the inner wall of the silencer 20 on the side close to the air inlet 101, and then partially flows through the first through hole 201 to the space between the two silencers 20, and flows along the outer wall of the silencer 20 on the side away from the air inlet 101. In this way, the refrigerant is guided secondary by the two silencers 20, further reducing the noise generated by the refrigerant. However, it is not limited to this. The two silencers 20 can also share a bottom plate 21. In this case, the two silencers 20 are a whole.

[0050] Of course, you can also Figure 7As shown, the positioning of the two silencers 20 is achieved by abutting the connecting plate 23 of one silencer 20 against the connecting plate 23 of the other silencer 20. Here, the two connecting plates 23 can abut each other axially or radially. When the two connecting plates 23 abut each other axially, the end faces of the two connecting plates 23 abut each other. In this way, the cylinder 10 does not need to be provided with a limiter 14 at the abutment point of the two connecting plates 23, which can reduce the processing of the cylinder 10. When the two connecting plates 23 abut each other radially, the connecting plates 23 on the two silencers 20 fit together and are connected by an interference fit to ensure the reliability of the connection. In this way, the processing of the cylinder 10 can also be reduced. In addition, the end of the inner connecting plate 23 can abut against the side plate 22 of the other silencer 20 to achieve axial positioning. It can be understood that this arrangement facilitates the installation of the two silencers 20 and helps to further improve the overall structural strength. The refrigerant first flows through the outer wall of the muffler plate 20 near the air inlet 101, then partially flows through the first through-hole 201 to the space between the two muffler plates 20, and then flows along the inner wall of the muffler plate 20 away from the air inlet 101. In this way, the refrigerant is secondary guided through the two muffler plates 20, further reducing the noise generated by the refrigerant. However, the two muffler plates 20 may also share a connecting plate 23, in which case the two muffler plates 20 form a single unit.

[0051] In other embodiments, the two silencer plates 20 may also be arranged at intervals along the axial direction, and the specific arrangement may be reasonable according to actual needs.

[0052] In one embodiment, the sound-absorbing plate 20 is a stamping structure to improve processing efficiency. Figure 2 As shown, along the axial direction of the cylinder 10, the vertical distance between the two ends of the side plate 22 is L, where 10 mm ≤ L ≤ 20 mm. This facilitates the stamping process of the muffler plate 20 and reduces the stamping difficulty. Optionally, the value of L can be 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, or 20 mm, etc., which are not listed here one by one.

[0053] Furthermore, if Figure 2 As shown, the acute angle formed by the side panels 22 and the bottom panel 21 is A, where 40°≤A≤70°. This facilitates the stamping process of the muffler panel 20 and reduces the difficulty of stamping. Optionally, the value of A can be 40°, 50°, 60°, or 70°, etc., which are not listed here.

[0054] Furthermore, if Figure 2As shown, the height of the connecting plate 23 along the axial direction of the cylinder 10 is T, where 7 mm ≤ T ≤ 12 mm. This facilitates the stamping process of the muffler plate 20 and reduces the stamping difficulty. Optionally, the value of T can be 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm, etc., which are not listed here one by one.

[0055] In the conventional structure, since the mounting hole 203 also serves to allow the refrigerant to pass through, the outer wall of the outlet pipe 30 and the inner wall of the mounting hole 203 need to be arranged at a certain distance. In this way, it is difficult for the muffler plate 20 to eliminate the vibration generated by the outlet pipe 30. Based on this, in one embodiment of the present application, Figure 1 As shown, the bottom plate 21 is provided with a mounting hole 203, through which the air outlet pipe 30 passes and is connected to the bottom plate 21. That is, in this embodiment, the inner wall of the mounting hole 203 abuts against the outer wall of the air outlet pipe 30, allowing the bottom plate 21 to effectively secure the air outlet pipe 30. Compared to conventional structures, this can better prevent the air outlet pipe 30 from tilting and causing vibration.

[0056] Furthermore, in one embodiment, the bottom plate 21 is provided with a flange 211, which is disposed around the mounting hole 203. Thus, the flange 211 increases the structural strength of the bottom plate 21 at the mounting hole 203, thereby further improving the fixing effect of the air outlet pipe 30 and preventing the air outlet pipe 30 from vibrating and generating noise.

[0057] Specifically, the height of the flange 211 protruding from the base plate 21 is H, where 2mm ≤ H ≤ 4mm. By properly setting the height of the flange 211, the connection with the outlet pipe 30 can be improved while also reducing the difficulty of manufacturing the flange 211. If H is greater than 4mm, the flange 211 is too high, making manufacturing more difficult. If H is less than 2mm, the flange 211 is too low, resulting in insufficient connection with the outlet pipe 30.

[0058] Optionally, the value of H may be 2 mm, 2.5 mm, 3 mm, 3.5 mm or 4 mm, etc., which are not listed here one by one.

[0059] like Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the flange 211 can extend in a direction close to or away from the opening 204, that is, the extension direction of the flange 211 can be inward or outward. At the same time, when the silencer 20 is installed in the cylinder 10, it is preferred to set the extension direction of the flange 211 to be the same as the insertion direction of the outlet pipe 30. In this way, it can play a certain guiding role in the installation of the outlet pipe 30 and reduce the difficulty of installing the outlet pipe 30.

[0060] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A liquid reservoir, characterized in that: The invention comprises a cylinder (10) and a muffler plate (20), wherein the muffler plate (20) is installed in the cylinder (10), and the muffler plate (20) comprises a bottom plate (21) and a side plate (22), wherein the side plate (22) is arranged around the circumference of the bottom plate (21) and is connected to the bottom plate (21), and along the axial direction of the cylinder (10), the side plate (22) has a tendency to gradually expand from one end close to the bottom plate (21) to one end away from the bottom plate (21); The side plate (22) is provided with a first through hole (201), and the bottom plate (21) is provided with a second through hole (202). The first through hole (201) passes through two opposite end surfaces of the side plate (22) along its own thickness direction, and the second through hole (202) passes through two opposite end surfaces of the bottom plate (21) along its own thickness direction.

2. The liquid reservoir according to claim 1, wherein There are a plurality of the first through holes (201), and the plurality of the first through holes (201) are distributed on the side plate (22) at intervals along the circumference of the cylinder (10); And / or, the number of the second through holes (202) is multiple, and the multiple second through holes (202) are distributed on the bottom plate (21) at intervals along the circumference of the cylinder (10).

3. The liquid reservoir according to claim 2, characterized in that Along the axial direction of the cylinder (10), the vertical distance between the two ends of the side plate (22) is L, wherein 10 mm ≤ L ≤ 20 mm; And / or, the acute angle formed by the side plate (22) and the bottom plate (21) is A, wherein 40°≤A≤70°.

4. The liquid reservoir according to any one of claims 1 to 3, characterized in that: The muffler plate (20) further comprises a connecting plate (23), the connecting plate (23) being provided at one end of the side plate (22) away from the bottom plate (21) and connected to the side plate (22); wherein the connecting plate (23) is connected to the inner wall of the cylinder (10); The liquid reservoir further comprises an air outlet pipe (30), one end of which is inserted into the cylinder (10) and connected to the cylinder (10), and the other end of which extends out of the cylinder (10); a mounting hole (203) is provided on the bottom plate (21), and the air outlet pipe (30) passes through the mounting hole (203) and is connected to the bottom plate (21).

5. The liquid reservoir according to claim 4, characterized in that The inner wall of the cylinder (10) protrudes in a direction close to its own axis to form a limiting portion (14); when the muffler plate (20) is installed in the cylinder (10), the limiting portion (14) stops at both ends of the connecting plate (23) along the axial direction; Alternatively, when the silencer plate (20) is installed in the cylinder (10), the outer wall of the connecting plate (23) and the inner wall of the cylinder (10) are interference-fitted.

6. The liquid reservoir according to claim 5, characterized in that An air inlet (101) is formed at one end of the cylinder (10), and an opening (204) is formed at one end of the muffler plate (20) away from the bottom plate (21); When the muffler plate (20) is installed in the cylinder (10), the opening (204) is arranged in a direction close to or facing away from the air inlet (101).

7. The liquid reservoir according to claim 6, characterized in that There are two muffler plates (20), and the openings (204) of the two muffler plates (20) are oriented in opposite directions; The bottom plates (21) of the two silencer plates (20) are in abutment with each other in the axial direction, or the two silencer plates (20) share one bottom plate (21), or the connecting plate (23) of one silencer plate (20) is in abutment with the connecting plate (23) of the other silencer plate (20), or the two silencer plates (20) share one connecting plate (23).

8. The liquid reservoir according to claim 6, wherein: The bottom plate (21) is provided with a flange (211), the flange (211) is arranged around the peripheral side of the mounting hole (203), and the flange (211) extends in a direction close to or away from the opening (204); When the muffler plate (20) is installed in the cylinder (10), the extension direction of the flange (211) is the same as the insertion direction of the air outlet pipe (30).

9. The liquid reservoir according to claim 8, characterized in that The height of the flange (211) protruding from the bottom plate (21) is H, wherein 2mm≤H≤4mm.

10. The liquid reservoir according to claim 1, wherein The cylinder (10) comprises a main body (11), a first cover (12) and a second cover (13) which are separately arranged, wherein the first cover (12) and the second cover (13) are respectively connected to opposite ends of the main body (11) along the axial direction; Alternatively, the cylinder (10) is an integrated structure.

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