A liquid discharge buffer, a noise reduction liquid storage device, an air conditioner outdoor unit and an air conditioner

Abstract

The application provides a liquid discharge buffer, a noise reduction liquid storage device, an air conditioner outdoor unit and an air conditioner, which comprise: a sound attenuation tank, a first partition plate is arranged in the sound attenuation tank, an inner cavity of the sound attenuation tank comprises an intermediate cavity, the first partition plate divides the intermediate cavity into a first cavity and an air inlet cavity, the first cavity is communicated with an outlet of the sound attenuation tank 1, and the outlet of the sound attenuation tank is provided with a liquid discharge valve; and a communication pipe is fixed on the first partition plate, an outlet of the communication pipe is communicated with the first cavity, and a first hole is arranged on the communication pipe, part of the first hole is located in the first cavity, and part of the first hole is located in the air inlet cavity, so that the technical problem that fluid flowing out of the liquid discharge buffer causes great impact on the liquid discharge valve in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioners, and particularly relates to a liquid discharge buffer, a noise reduction liquid storage device, an air conditioner outdoor unit and an air conditioner. BACKGROUND

[0002] In a multi-split system, a liquid storage tank is usually selected to store refrigerant, to store excess refrigerant when the whole machine has a small load, to supplement the main system when the load becomes large, and to improve the comfort of the unit heating. The liquid storage tank is generally installed after the condenser to store liquid, to avoid too much liquid accumulation in the condenser, to make the refrigerant in the liquid storage tank flow out smoothly during heating operation of the unit, to open the pressurizing valve, and to mix the high-temperature and high-pressure gas in the tank body with the liquid refrigerant entering through the liquid inlet valve. Due to the high height, large volume and high pressure of the liquid storage tank, the mixed refrigerant flowing out of the liquid storage tank will cause the exhaust valve on the liquid discharge pipeline of the liquid storage tank to leak.

[0003] The prior art sets a liquid discharge buffer downstream of the liquid storage tank, sets a liquid discharge valve downstream of the liquid discharge buffer, and reduces the speed and pressure of the fluid flowing out of the liquid storage tank through the liquid discharge buffer before the fluid passes through the liquid discharge valve, to reduce the impact of the fluid on the liquid discharge valve. However, the high-temperature and high-pressure gas entering the tank body through the pressurizing valve is directly discharged from the compressor, and the gas has certain pressure and flow rate fluctuations, that is, the flow rate and pressure have certain fluctuations. The fluctuations will pass through the fluid into the liquid discharge buffer, although the overall flow rate and pressure of the fluid are reduced, the flow fluctuations of the fluid will still cause temporary pressure impact, which will still adversely affect the liquid discharge valve. How to make the fluid flowing out of the liquid discharge buffer more stable, and thus reduce the impact of the fluid on the liquid discharge valve, is a technical problem that needs to be solved at present. SUMMARY

[0004] Therefore, the present application provides a liquid discharge buffer, a noise reduction liquid storage device, an air conditioner outdoor unit and an air conditioner, which can solve the technical problem that the fluid flowing out of the liquid discharge buffer in the prior art causes great impact on the liquid discharge valve.

[0005] In a first aspect, the present application provides a liquid discharge buffer, comprising:

[0006] The sound attenuation tank has a first partition plate arranged therein, the inner cavity of the sound attenuation tank comprises an intermediate cavity, the first partition plate divides the intermediate cavity into a first cavity and an air inlet cavity, the first cavity is in communication with the outlet of the sound attenuation tank 1, and the outlet of the sound attenuation tank is provided with a liquid discharge valve.

[0007] The communication pipe is fixed on the first partition plate, the outlet of the communication pipe leads to the first cavity, and the communication pipe is provided with a first hole, part of the first hole is located in the first cavity, and part of the first hole is located in the air inlet cavity.

[0008] In some embodiments, a second partition is arranged in the muffling tank, the second partition separates the air inlet cavity into a second cavity and a third cavity, the second cavity is between the first cavity and the third cavity, and the third cavity is in communication with the inlet of the muffling tank; the communication pipe is also fixed on the second partition, the communication pipe is provided with a second hole, the second hole is located in the second cavity, and the inlet of the communication pipe leads to the third cavity.

[0009] In some embodiments, there are multiple communication pipes and multiple second holes; in adjacent two communication pipes, at least one second hole on one communication pipe is opposite to a second hole on the other communication pipe.

[0010] In some embodiments, in the direction from the inlet to the outlet of the muffling tank, the length of the intermediate cavity is D2, the length of the second cavity is D3, and D2 / D3≥1.5.

[0011] In some embodiments, the muffling tank is also provided with an exhaust cavity 304, the exhaust cavity 304 is arranged between the first cavity and the outlet of the muffling tank, a flow-out pipe is inserted into the outlet of the muffling tank, the depth of the flow-out pipe extending into the exhaust cavity 304 is D4, and D4≤6mm.

[0012] In the second aspect, the application also provides a noise reduction liquid storage device, which comprises a liquid storage tank and the liquid discharge buffer.

[0013] In some embodiments, a liquid distribution shell is arranged in the liquid storage tank, the inlet of the liquid distribution shell faces the top of the liquid storage tank, the liquid distribution shell is fixed on the top of the liquid storage tank, a space is formed between the liquid distribution shell and the side wall of the liquid storage tank, and multiple through holes leading to the space are arranged on the liquid distribution shell; a liquid inlet pipe and a pressurizing pipe are inserted into the top of the liquid storage tank, the lower end of the liquid inlet pipe is located in the liquid distribution shell, and the outlet of the liquid inlet pipe faces the side wall of the liquid distribution shell.

[0014] In some embodiments, the inner diameter of the liquid storage tank is φ1, the outlet of the liquid distribution shell faces downward, the outlet end of the liquid distribution shell is in a constricted shape, the outlet diameter of the liquid distribution shell is φ2, and φ2 / φ1≥1.5.

[0015]

[0016] In some embodiments, the height of the liquid storage tank is H1, the length of the liquid distribution shell along the axial direction of the liquid storage tank is D1, and H1 / D1≥1.5.

[0017] In some embodiments, the axial direction of the muffling tank is the up-down direction, the muffling tank is fixed on the liquid storage tank, and when the outflow pipe is provided, the distance between the bottom of the liquid storage tank and the top of the outflow pipe is H2,

[0018] In some embodiments, the liquid storage tank and the muffling tank are communicated through a liquid discharge pipe, the liquid discharge pipe extends into the inner cavity of the liquid storage tank by a height D5, and D5≤8 mm; the inner diameter of the liquid discharge pipe is φ3, and φ3≥9 mm.

[0019] In a third aspect, the present application provides an air conditioner outdoor unit comprising the noise reduction liquid storage device.

[0020] In a fourth aspect, the present application provides an air conditioner comprising the air conditioner outdoor unit.

[0021] By making the first hole simultaneously communicate the first cavity, the air inlet cavity and the inner cavity of the communication pipe, the fluid in the communication hole can quickly flow with the fluid in the first cavity and the air inlet cavity when the pressure changes, so that the pressure in the communication pipe can be kept relatively stable, and the pressure of the fluid flowing into the first cavity is also relatively stable, which makes the flow rate and pressure of the fluid flowing from the liquid discharge buffer to the liquid discharge valve relatively stable, which is beneficial to reducing the impact of the fluid on the liquid discharge valve. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. The drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creative labor.

[0023] Figure 1 is a schematic view of the appearance of the noise reduction liquid storage device of the embodiment of the present application;

[0024] Figure 2 is a schematic view of the appearance of the noise reduction liquid storage device of the embodiment of the present application; Figure 1 is a schematic view of the appearance of the noise reduction liquid storage device of the embodiment of the present application;

[0025] Figure 3 is a schematic view of the appearance of the noise reduction liquid storage device of the embodiment of the present application;

[0026] Figure 4 is a schematic view of the appearance of the noise reduction liquid storage device of the embodiment of the present application; Figure 1

[0027] Figure 5 Figure 1

[0028] ​​​Figure 6 is an embodiment of the present application Figure 5 is an embodiment of the present application

[0029] Reference signs are:

[0030] 1, silencer; 101, first partition; 102, second partition; 2, liquid storage tank; 201, separation shell; 202, through hole; 203, interval; 301, first cavity; 302, second cavity; 303, third cavity; 304, exhaust cavity; 305, diffusion cavity; 4, communication pipe; 401, first hole; 402, second hole; 403, third hole; 5, outflow pipe; 6, liquid discharge pipe; 601, liquid inlet pipe; 602, pressurizing pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0032] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0033] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0035] See also Figures 1-6 As shown, the present invention provides a drain buffer, comprising:

[0036] The silencer 1 has a first partition 101 inside. The inner cavity of the silencer 1 includes an intermediate cavity. The first partition 101 divides the intermediate cavity into a first cavity 301 and an air inlet cavity. The first cavity 301 is connected to the outlet of the silencer 1. The outlet of the silencer 1 is provided with a drain valve.

[0037] A connecting pipe 4 is fixed on the first partition 101. The outlet of the connecting pipe 4 leads to the first cavity 301. A first hole 401 is provided on the connecting pipe 4. A part of the first hole 401 is located in the first cavity 301 and a part is located in the air intake cavity.

[0038] Fluid enters the muffler 1, and the flow rate is not stable. The flow rate and pressure of the fluid flowing through the first hole 401 are different. When the pressure generated by the fluid flowing through the first hole 401 in the communication pipe 4 is less than the external pressure at the first hole 401 of the communication pipe 4 (pressure change caused by flow rate fluctuation), part of the fluid will enter the communication pipe 4 from the first hole 401. Since part of the first hole 401 is also located in the first cavity 301, part of the fluid can also quickly enter the first hole 401 from the first cavity 301. Similarly, when the pressure generated by the fluid flowing through the first hole 401 in the communication pipe 4 is greater than the external pressure at the first hole 401 of the communication pipe 4, part of the fluid will flow out of the communication pipe 4 from the first hole 401. Since part of the first hole 401 is also located in the first cavity, part of the fluid will also quickly enter the first cavity 301 from the first hole 401. This further stabilizes the pressure of the fluid entering the first cavity 301 from the communication pipe 4, thereby reducing the impact of the fluid discharged from the muffler on the drain valve.

[0039] When the fluid enters the first cavity 301 through the communication pipe 4, the flow rate of the fluid decreases and expands outward to reduce noise.

[0040] A third hole 403 can also be provided on the communication pipe 4. Part of the third hole 403 is located in the air inlet cavity, and part of the third hole 403 is located in the first cavity 301 and penetrates the end face of the communication pipe 4. Compared with the first hole 401, the fluid flowing out of the third hole 403 instantaneously spreads over a larger area and can spread in more directions. That is, the fluid flowing out of the communication pipe 4 flows in different directions, which is beneficial to reduce the impact vibration of the gas flow on the muffler 1.

[0041] Preferably, as shown in Figure 3 A second partition 102 is provided in the muffler 1. The second partition 102 divides the air inlet cavity into a second cavity 302 and a third cavity 303. The second cavity 302 is located between the first cavity 301 and the third cavity 303, and the third cavity 303 is in communication with the inlet of the muffler 1. The communication pipe 4 is also fixed to the second partition 102. A second hole 402 is provided on the communication pipe 4. The second hole 402 is located in the second cavity 302, and the inlet of the communication pipe 4 leads to the third cavity 303.

[0042] By providing the second partition 102, the fluid enters the communication pipe 4, and the fluid flow rate and pressure decrease when the fluid enters the second cavity 302 from the second hole 402 of the communication pipe 4, achieving the effect of expansion and noise reduction. Under the influence of pressure pulsation, the fluid entering the second cavity 302 will gradually enter the communication pipe 4 through the first hole 401 and the second hole 402, and then enter the first cavity 301 together with the fluid in the communication pipe 4.

[0043] The second cavity 302 can only communicate with the first cavity 301 through the communication pipe 4 (including the first hole 401 on the communication pipe 4), and the second cavity 302 can only communicate with the third cavity 303 through the communication pipe 4. Therefore, the second cavity 301 can only communicate with the first hole 401 and the second hole 402 in the inner cavity of the communication pipe 4. The second cavity 301 is equivalent to a buffer area for adjusting the pressure in the inner cavity of the communication pipe 4. When the pressure in the inner cavity of the communication pipe 4 is greater than the pressure in the second cavity 301, the gas in the communication pipe 4 flows into the second cavity 302 through the first hole 301 and the second hole 302. When the pressure in the inner cavity of the communication pipe 4 is less than the pressure in the second cavity 301, the gas in the second cavity 302 flows into the communication pipe 4 through the first hole 301 and the second hole 302. In this way, the pressure in the communication pipe 4 is adjusted.

[0044] Preferably, as shown in Figure 3 The communication pipe 4 has multiple second holes 402, and at least one second hole 402 on one of the communication pipes 4 is opposite to a second hole 402 on the other communication pipe 4.

[0045] The second holes 402 on the adjacent communication pipes 4 are opposite to each other, so that when the gas is discharged from the communication pipe 4, the gas collides with each other, thereby reducing the flow speed of the gas in the second cavity 302 and reducing the impact force of the gas on the muffler 1 in the second cavity 302, thereby reducing the vibration generated by the gas in the second cavity 302.

[0046] Further, along the direction of the flow of the gas, the diameters of the multiple second holes 402 on at least one communication pipe 4 gradually increase. Since the communication pipe 4 has a damping effect on the gas, the gradually increasing diameters of the second holes 402 along the flow direction of the fluid can ensure that the fluid enters the second cavity 302.

[0047] Preferably, as shown in Figures 3-4 From the inlet to the outlet of the muffler 1, the length of the intermediate cavity is D2, the length of the second cavity 302 is D3, and

[0048] If the length of the second cavity 302 accounts for too large a proportion of the intermediate cavity, the expansion silencing effect of the gas entering the third cavity 303 is reduced, and the expansion silencing effect of the gas entering the first cavity 301 from the second cavity 302 and the communication pipe 4 is reduced. If the length of the second cavity 302 accounts for too small a proportion of the intermediate cavity, the expansion silencing effect of the gas entering the second cavity 302 from the second hole 402 on the communication pipe 4 is reduced, and when When the gas enters the third chamber 303 from the inlet of the silencer 1, enters the second chamber 302 from the connecting pipe 4, and enters the first chamber 301 from the second chamber 302 and the connecting pipe 4, the combined expansion and silencing effect is quite ideal.

[0049] Furthermore, the second cavity 302 is located in the middle of the intermediate cavity, and the first cavity 301 and the third cavity 303 have the same length. At that time, the overall noise reduction effect of silencer 1 was the best.

[0050] Preferred, such as Figures 3-4 As shown, the muffler 1 is also provided with an exhaust chamber 304, which is located between the first chamber 301 and the outlet of the muffler 1. An outflow pipe 5 is inserted into the outlet of the muffler 1, and the depth of the outflow pipe 5 extending into the exhaust chamber 304 is D4, where D4≤6mm.

[0051] The outlet pipe 5 extends into the exhaust chamber 304. This serves two purposes: firstly, it reduces the impact force on the end face of the outlet pipe 5 when gas exits from the muffler 1, improving the stability of the fixation between the outlet pipe 5 and the muffler 1; secondly, it facilitates welding. To avoid unnecessary impact on the outer circumference of the outlet pipe caused by gas flowing within the muffler 1, the depth of the outlet pipe 5 extending into the exhaust chamber 304 should be D4 ≤ 6 mm.

[0052] In actual production, the silencer tank 1 is formed by splicing and welding multiple annular plates together. Before forming the tank body, a discharge pipe is inserted and welded to the discharge pipe from the inside. Welding from the inside helps to improve the strength.

[0053] The inner cavity of the silencer 1 also includes a diffusion cavity 305, which is located between the third cavity 303 and the inlet of the silencer 1, and the third cavity 303 and the diffusion cavity 305 are directly connected. The diffusion cavity 305 is formed by the inner cavity of the lower end cap of the silencer 1, which is conical in shape. The large end of the conical lower end cap faces upward. When the fluid enters the diffusion cavity 305, it will initially diffuse. After the fluid enters the silencer 1, it will rapidly expand in the diffusion cavity 305 and the third cavity 303, thus performing initial silencing.

[0054] This invention provides a noise-reducing liquid storage device, such as... Figure 1 , 2 As shown in Figures 4 and 5, the system includes a liquid storage tank 2 and a drain buffer, wherein the outlet of the liquid storage tank 2 is connected to the inlet of the drain buffer.

[0055] The fluid discharged from the storage tank 2 is decelerated, depressurized, and equalized by the drain buffer, resulting in minimal pressure fluctuations on the drain valve, effectively ensuring the stability of the drain valve.

[0056] The outlet of the liquid storage tank 2 is located at the bottom. The gas, liquid, and gas-liquid mixture discharged from the liquid storage tank 2 exits from the bottom of the liquid storage tank 2 and enters the silencer tank 1. Compared with the liquid being discharged from the side of the liquid storage tank 2, this improves the discharge efficiency of the liquid storage tank 2 and avoids liquid accumulation and residue inside the liquid storage tank 2. There is often flow noise when the fluid is discharged from the liquid storage tank 2. The volume of the flow noise is reduced after entering the silencer tank 1.

[0057] The outer wall of the liquid storage tank 2 is covered with sound insulation or noise reduction components to reduce the noise generated inside the liquid storage tank 2, especially high-frequency noise, from spreading outward.

[0058] Preferred, such as Figures 3-4 As shown, a liquid separator 201 is provided inside the liquid storage tank 2. The inlet of the liquid separator 201 faces the top of the liquid storage tank 2. The liquid separator 201 is fixed to the top of the liquid storage tank 2. A gap 203 is formed between the liquid separator 201 and the side wall of the liquid storage tank 2. The liquid separator 201 is provided with a plurality of through holes 202 leading to the gap 203. An inlet pipe and a pressurizing pipe are inserted into the top of the liquid storage tank 2. The lower end of the inlet pipe is located inside the liquid separator 201 and its outlet faces the side wall of the liquid separator 201.

[0059] When the gas-liquid mixture enters the storage tank 2 through the inlet pipe, after flowing out of the inlet pipe, because the lower end of the inlet pipe faces the side wall of the storage tank 2, the gas-liquid mixture will not directly impact the side wall of the storage tank 2, thus avoiding the generation of single-frequency humming noise in the tank. The gas-liquid mixture impacts the separator shell 201, and some of the liquid adheres to the separator shell 201, completing the separation from the gas. When the separator shell 201 is a cylindrical shell, some of the gas-liquid mixture will also move in a circular motion along the separator shell 201. Because the separator shell 201 is provided with through holes 202, under the action of centrifugal force, the liquid flows from the through holes 202 into the partition 203 and adheres to the side wall of the storage tank 2, while the gas also enters the partition 203 and flows downward, thus achieving gas-liquid separation. The partition 203 between the separator shell 201 and the storage tank 2 not only serves for gas-liquid separation but also reduces noise transmission and reduces the impact vibration of the fluid on the side wall of the storage tank 2. By incorporating a separation shell, gas-liquid stratification is achieved, reducing the impact pressure on the tank body and improving fluid flow noise within the storage tank 2. When the fluid flows through the through-hole 202, the pressure decreases, reducing the impact on the inner wall of the storage tank 2 and thus reducing noise generation. The through-hole 202 also reduces flow noise generated by the flow of the gas-liquid mixture.

[0060] The high-pressure fluid discharged from the compressor enters the liquid storage tank directly through the pressurization pipe, pressurizing the liquid in the tank so that it can flow out smoothly.

[0061] Further, the plurality of through holes 202 are uniformly distributed on the liquid separation shell 201, and the force of the gas-liquid mixture on the liquid storage tank 2 and the liquid separation shell 201 in the four directions is relatively balanced, reducing the vibration of the liquid storage tank 2 as a whole and improving the stability of the operation of the liquid storage tank 2. Alternatively, the diameters of the through holes 202 gradually decrease from top to bottom. Since the fluid flows from top to bottom as a whole, the liquid in the gas-liquid mixture gradually decreases from top to bottom. The smaller through holes 202 can effectively separate smaller liquid droplets.

[0062] The diameters of the through holes 202 can also be optimally set to weaken and absorb noise in different frequency bands.

[0063] For a single-compressor system, when the capacity of the liquid storage tank 2 is low, the longitudinal spacing of the through holes 202 can be arranged according to 50-60 mm. For a double-compressor system, when the capacity of the liquid storage tank 2 is large, the longitudinal spacing of the through holes 202 can be arranged according to 25-45 mm, which is beneficial to the optimization of gas-liquid mixed sound under different frequency bands during the operation of the compressor.

[0064] From a spatial point of view, the inner cavity of the liquid storage tank 2 is divided into a separation cavity surrounding the liquid separation shell 201 and a liquid storage cavity located below the separation cavity.

[0065] Preferably, as shown in Figures 3-4 the inner diameter of the liquid storage tank 2 is φ1, the outlet of the liquid separation shell 201 faces downward, the outlet end of the liquid separation shell 201 is conical, and the outlet diameter of the liquid separation shell 201 is φ2, then,

[0066] Part of the gas-liquid mixture flows downward in the liquid separation shell 201. By making the outlet end of the liquid separation shell 201 conical, the gas-liquid mixture contacts the side wall of the liquid separation shell 201 during downward flow, thereby achieving gas-liquid separation. If the outlet diameter of the liquid separation shell 201 is too small, the flow resistance of the fluid is too large, and the flow noise is too large. If the outlet diameter of the liquid separation shell 201 is too large, the gas-liquid separation effect is poor. By making The gas-liquid separation efficiency can be improved while ensuring that the noise is acceptable. Preferably,

[0067] Further, the liquid separation shell 201 is a conical shell that is large at the top and small at the bottom.

[0068] Preferably, as shown in Figures 3-4 the height of the liquid storage tank 2 is H1, and the length of the liquid separation shell 201 along the axis of the liquid storage tank 2 is D1, then,

[0069] If the length of the separating shell 201 is too large, the liquid separated from the lower part of the storage tank 2 will come into contact with the separating shell 201, and the gas flowing downwards along the separating shell will cause the separated liquid to re-integrate into the gas; if the length of the separating shell 201 is too small, the gas-liquid separation efficiency will be low. By making... This ensures efficient gas-liquid separation while preventing gas from interfering with the liquid stored in the lower part of the storage tank 2.

[0070] Preferred, such as Figures 3-4 As shown, the axial direction of the silencer tank 1 is vertical. The silencer tank 1 is fixed on the liquid storage tank 2. When the outlet pipe 5 is provided, the distance from the bottom of the liquid storage tank 2 to the top of the outlet pipe 5 is H2.

[0071] If the drain buffer is too high, the liquid entering the silencer tank 1 will need more kinetic energy to flow out of the silencer tank 1. When the pressure in the storage tank 2 is constant, if the drain buffer is too high, the liquid entering the silencer tank 1 will not be able to flow out of the silencer tank 1.

[0072] Preferred, such as Figures 3-4 As shown, the liquid storage tank 2 is connected to the silencer tank 1 via a drain pipe 6, the drain pipe 6 extends into the inner cavity of the liquid storage tank 2 to a height of D5, where D5≤8mm; the inner diameter of the drain pipe 6 is φ3, where φ3≥9mm.

[0073] When the fluid flowing to the silencer tank 1 is a gas-liquid two-phase mixture, the gas and liquid phases are prone to generating a "whistling" sound at the outlet of the storage tank 2. By extending the drain pipe 6 into the inner cavity of the storage tank 2 to a height of D5, where D5≤8mm; and by having the inner diameter of the drain pipe 6 be φ3, where φ3≥9mm, the noise generated when the gas and liquid phases flow out of the storage tank 2 is reduced.

[0074] Thirdly, the present invention also provides an outdoor unit for an air conditioner, including the aforementioned noise-reducing liquid storage device.

[0075] Fourthly, the present invention also provides an air conditioner, including the aforementioned outdoor unit.

[0076] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0077] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drain buffer, characterized in that, include: A silencer (1) is provided inside, with a first partition (101). The inner cavity of the silencer (1) includes an intermediate cavity. The first partition (101) divides the intermediate cavity into a first cavity (301) and an air inlet cavity. The first cavity (301) is connected to the outlet of the silencer (1). The outlet of the silencer (1) is provided with a drain valve. A connecting pipe (4) is fixed on the first partition (101). The outlet of the connecting pipe (4) leads to the first cavity (301). A first hole (401) is provided on the connecting pipe (4). A part of the first hole (401) is located in the first cavity (301) and a part is located in the air inlet cavity.

2. The drain buffer according to claim 1, characterized in that, The silencer (1) is provided with a second partition (102), which divides the air intake chamber into a second chamber (302) and a third chamber (303). The second chamber (302) is located between the first chamber (301) and the third chamber (303). The third chamber (303) is connected to the inlet of the silencer (1). The connecting pipe (4) is also fixed on the second partition (102). The connecting pipe (4) is provided with a second hole (402), which is located in the second chamber (302). The inlet of the connecting pipe (4) leads to the third chamber (303).

3. The drain buffer according to claim 2, characterized in that, There are multiple connecting pipes (4) and multiple second holes (402); in two adjacent connecting pipes (4), at least one second hole (402) on one connecting pipe (4) is opposite to a second hole (402) on the other connecting pipe (4).

4. The drain buffer according to claim 3, characterized in that, In the direction from the inlet to the outlet of the silencer (1), the length of the intermediate cavity is D2, and the length of the second cavity (302) is D3.

5. The drain buffer according to claim 1, characterized in that, The muffler (1) is also provided with an exhaust chamber (304), which is located between the first chamber (301) and the outlet of the muffler (1). An outflow pipe (5) is inserted into the outlet of the muffler (1), and the depth of the outflow pipe (5) extending into the exhaust chamber (304) is D4, where D4≤6mm.

6. A noise-reducing liquid storage device, characterized in that, It includes a storage tank (2) and a drain buffer as described in any one of claims 1-5, wherein the outlet of the storage tank (2) is connected to the inlet of the drain buffer.

7. The noise-reducing liquid storage device according to claim 6, characterized in that, The liquid storage tank (2) is provided with a liquid separator (201). The inlet of the liquid separator (201) faces the top of the liquid storage tank (2). The liquid separator (201) is fixed to the top of the liquid storage tank (2). A gap (203) is formed between the liquid separator (201) and the side wall of the liquid storage tank (2). The liquid separator (201) is provided with a plurality of through holes (202) leading to the gap (203). An inlet pipe (601) and a pressurizing pipe (602) are inserted into the top of the liquid storage tank (2). The lower end of the inlet pipe (601) is located inside the liquid separator (201) and its outlet faces the side wall of the liquid separator (201).

8. The noise-reducing liquid storage device according to claim 7, characterized in that, The inner diameter of the storage tank (2) is φ1, the outlet of the liquid separator (201) faces downward, the outlet end of the liquid separator (201) is constricted, and the outlet diameter of the liquid separator (201) is φ2.

9. The noise-reducing liquid storage device according to claim 7, characterized in that, The height of the storage tank (2) is H(1), and the length of the liquid separator (201) along the axial direction of the storage tank (2) is D1.

10. The noise-reducing liquid storage device according to claim 9, characterized in that, The silencing tank (1) is axially oriented vertically. The silencing tank (1) is fixed to the liquid storage tank (2). When an outlet pipe (5) is provided, the distance from the bottom of the liquid storage tank (2) to the top of the outlet pipe (5) is H2.

11. The noise-reducing liquid storage device according to any one of claims 6-10, characterized in that, The storage tank (2) is connected to the silencer tank (1) via a drain pipe (6). The drain pipe (6) extends into the inner cavity of the storage tank (2) to a height of D5, where D5 ≤ 8 mm. The inner diameter of the drain pipe (6) is φ3, where φ3 ≥ 9 mm.

12. An outdoor unit for an air conditioner, characterized in that, Includes the noise-reducing liquid storage device according to any one of claims 6-11.

13. An air conditioner, characterized in that, Includes the air conditioner outdoor unit as described in claim 12.

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