Oil-gas separation device and air conditioner

Abstract

The utility model provides an oil -gas separation device and air conditioner relates to air conditioning technical field has solved the technical problem that oil -gas separation structure complex, separation efficiency low exists in prior art. The oil -gas separation device and air conditioner include the sound attenuation chamber, the sound attenuation chamber intercommunication exhaust port, the separation chamber is separated setting with the sound attenuation chamber, and the separation chamber is provided with the air inlet pipe, the sound attenuation pipe is connected the sound attenuation chamber and the separation chamber, and extends to the sound attenuation chamber and the separation chamber respectively, and the oil -gas mixture that enters from the air inlet pipe passes through the separation chamber, the sound attenuation pipe, the sound attenuation chamber in proper order and is discharged from the exhaust port. The utility model is used for providing an oil -gas separation device and air conditioner that can carry out oil -gas separation and can also sound attenuation.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to an oil-gas separation device and an air conditioner. Background Technology

[0002] Multi-split air conditioning systems (VRF systems) are widely used in commercial and residential buildings due to their advantages such as flexible installation, high partial load energy efficiency, and small footprint. Their outdoor units typically require key functional components such as oil separators, silencers, return oil filters, and intake air filters to ensure long-term stable and reliable operation.

[0003] In the existing technology, the above four components are usually independent standardized parts. Their connection method is as follows: the air outlet of the oil separator is connected to the air inlet pipe of the muffler through a section of copper pipe, and the air outlet of the muffler is then connected to the system exhaust pipe through another section of copper pipe; the oil return port at the bottom of the oil separator is led out through a section of oil return pipe, and an independent oil return filter is connected in series in the oil return pipe; the air intake filter is connected in series separately in the air intake pipe.

[0004] The air conditioning system using the above-mentioned layout has technical problems such as complex structure, low efficiency, and high cost. Utility Model Content

[0005] The purpose of this utility model is to provide an oil-gas separation device and an air conditioner to solve the technical problems of complex oil-gas separation structures and low separation efficiency in the prior art. The various technical effects of the preferred technical solutions provided by this utility model are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The oil-gas separation device provided by this utility model includes: A silencing chamber, wherein the silencing chamber is connected to the exhaust port; A separation chamber is provided separately from the silencing chamber, and the separation chamber is equipped with an air inlet pipe; A muffler pipe connects the muffler chamber and the separation chamber, and extends into the muffler chamber and the separation chamber respectively. The oil-gas mixture entering from the intake pipe flows sequentially through the separation chamber, the muffler pipe, and the muffler chamber before being discharged from the exhaust port.

[0007] As an optional implementation, the silencing chamber is provided with multiple partition plates, which divide the silencing chamber into multiple silencing sub-cavities. The silencing pipe passes through the multiple partition plates in sequence, and each silencing pipe located in each silencing sub-cavity is provided with a number of silencing holes.

[0008] As an optional implementation, the volumes of the plurality of silencing cavities may be the same or different; and / or the sizes of the plurality of silencing holes may be the same or different.

[0009] As an optional implementation, the air intake pipe is positioned off-center from the central axis of the silencing chamber.

[0010] As an optional implementation, the end of the air intake pipe located in the separation chamber is provided with a bevel, the direction of which is opposite to that of the silencer pipe.

[0011] As an optional implementation, the system includes a cylindrical body, in which a partition plate is provided. The partition plate divides the accommodating cavity inside the cylindrical body into an anechoic chamber and a separation chamber, with the separation chamber located below the anechoic chamber.

[0012] As an optional implementation, the air intake pipe is disposed adjacent to the partition plate, and the air intake pipe is perpendicular to the axis of the cylinder.

[0013] As an optional implementation, an oil filter screen is provided at the bottom of the separation chamber, and an oil return port is provided at the bottom of the oil filter screen.

[0014] As an optional implementation, the oil filter screen has a trapezoidal cross-section; and / or, the small-diameter end of the oil filter screen is connected to the silencer pipe.

[0015] As an optional implementation, the oil filter screen has a triangular cross-section.

[0016] As an optional implementation, a refrigerant filter is provided in the silencing chamber, and the refrigerant filter is disposed between the silencing pipe and the exhaust port.

[0017] As an optional implementation, the refrigerant filter has a trapezoidal or triangular cross-section, with the larger diameter end of the refrigerant filter facing the silencer pipe.

[0018] An air conditioner includes an oil-gas separation device as described above.

[0019] The beneficial effects of this utility model are as follows: The oil-gas separation device and air conditioner provided by this utility model include a silencing chamber and a separation chamber that are separated from each other. The separation chamber and the silencing chamber are separated and connected by a silencing pipe that extends into both the silencing chamber and the separation chamber, forming a series flow path of separation followed by silencing. After the oil-gas mixture enters the separation chamber from the inlet pipe, the lubricating oil and gas are first separated efficiently by centrifugation, collision or gravity settling. Then the gas enters the silencing chamber through the silencing pipe to achieve silencing, thereby effectively reducing the noise generated by the compressor exhaust. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the oil-gas separation device of this utility model; Figure 2 This is a cross-sectional view (a) of Embodiment 1 of the oil-gas separation device of this utility model; Figure 3 This is a cross-sectional view (II) of Embodiment 1 of the oil-gas separation device of this utility model; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the oil-gas separation device of this utility model; Figure 5 This is a structural schematic diagram of the air conditioner of this utility model; Figure 6 This is a schematic diagram of the structure of the oil-gas separation device of this utility model, which uses an oil filter screen with a trapezoidal cross-section.

[0022] In the picture: 100. Cylinder body; 110. Isolation panel; 120. Silenced chamber; 130. Separation chamber; 140. Exhaust port; 150. Intake pipe; 160. Oil filter screen; 170. Refrigerant filter; 180. Divider; 190. Oil return port; 121. Silencer and cavity separation; 1010. Silencer pipe; 1020, silencer hole; 151. Oblique cut; 200. Compressor; 300. Condenser; 400. Throttling device; 500. Evaporator; 600. Return valve. Detailed Implementation

[0023] Please refer to the attached diagram below. Figures 1-6This document explains the content of this utility model and its differences from existing technologies. The technical solutions (including preferred solutions) of this utility model are further described in detail below through accompanying drawings and examples of optional embodiments. It should be noted that any technical feature or solution in this embodiment is one or more of a variety of optional technical features or solutions. For the sake of brevity, this document cannot exhaustively list all alternative technical features and solutions of this utility model, nor is it convenient to emphasize that each implementation of a technical feature is one of multiple optional implementations. Therefore, those skilled in the art should understand that any technical means provided by this utility model can be replaced, or any two or more technical means or features provided by this utility model can be combined to obtain a new technical solution. No technical feature or solution in this embodiment limits the scope of protection of this utility model. The scope of protection of this utility model should include any alternative technical solutions that can be conceived by those skilled in the art without creative effort, as well as new technical solutions obtained by combining any two or more technical means or features provided by this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] This utility model provides an oil-gas separation device and an air conditioner that can both separate oil and gas and reduce noise.

[0027] The following is combined with Figures 1-6 The technical solution provided by this utility model will be described in more detail.

[0028] This utility model provides an oil-gas separation device, comprising: Silencing chamber 120, wherein the silencing chamber 120 is connected to exhaust port 140; The separation chamber 130 is separated from the silencing chamber 120, and the separation chamber 130 is provided with an air inlet pipe 150; The muffler pipe 1010 connects the muffler chamber 120 and the separation chamber 130, and extends into the muffler chamber 120 and the separation chamber 130 respectively. The oil-gas mixture entering from the intake pipe 150 flows sequentially through the separation chamber 130, the muffler pipe 1010, and the muffler chamber 120 before being discharged from the exhaust port 140.

[0029] The oil-gas separation device provided by this utility model includes a silencing chamber 120 and a separation chamber 130 separated from each other. The separation chamber 130 and the silencing chamber 120 are separated and connected by a silencing pipe 1010 extending into both the silencing chamber 120 and the separation chamber 130, forming a series flow path of separation followed by silencing. After the oil-gas mixture enters the separation chamber 130 from the inlet pipe 150, the lubricating oil and gas are first efficiently separated by centrifugation, collision or gravity settling. Then the gas enters the silencing chamber 120 through the silencing pipe 1010 to achieve silencing, thereby effectively reducing the noise generated by the compressor 200 exhaust.

[0030] It can be seen that the above-mentioned oil-gas separation device can both separate oil and gas and reduce noise, integrating the functions of oil-gas separation and noise reduction into one, making the structure more compact and thus saving space; at the same time, it can significantly reduce welding points and sealing points, reducing the failure rate.

[0031] In some embodiments of this utility model, the silencing chamber 120 is provided with a plurality of partition plates 180, which divide the silencing chamber 120 into a plurality of silencing sub-cavities 121. The silencing pipe 1010 passes through the plurality of partition plates 180 in sequence, and each silencing pipe 1010 located in each of the silencing sub-cavities 121 is provided with a silencing hole 1020.

[0032] In some embodiments of the present invention described above, multiple partition plates 180 divide the silencing chamber 120 into multiple silencing sub-cavities 121 along the airflow direction. Each silencing pipe 1010 located in each of the silencing sub-cavities 121 is provided with a silencing hole 1020, thereby forming a multi-stage silencing structure, realizing multi-stage silencing and improving the silencing effect.

[0033] Understandably, by setting up multiple partitions 180, the anechoic chamber 120 can be ensured to have good strength, thus avoiding the problem of noise generated by the vibration of the anechoic chamber 120 under high-speed airflow.

[0034] In some embodiments of this utility model, the volumes of the plurality of silencing cavities 121 are the same or different; and / or the sizes of the plurality of silencing holes 1020 are the same or different.

[0035] In some embodiments of the present invention described above, the volumes of the plurality of noise-absorbing chambers 121 are the same or different. The volume combination of each chamber can be flexibly adjusted according to the actual tested noise spectrum of the compressor 200, thereby improving the product's adaptability to different noise sources and energy efficiency requirements.

[0036] As the core structure for sound energy dissipation, the size of the silencing hole 1020 directly affects the acoustic characteristics and aerodynamic performance of the silencer. By setting the silencing hole 1020 to the same size or different sizes, silencing holes 1020 of different sizes can be arranged in different silencing cavities 121 to form graded tuning and achieve noise reduction across the entire frequency band.

[0037] In some embodiments of this utility model, a cylindrical body 100 is included, and an isolation plate 110 is provided inside the cylindrical body 100. The isolation plate 110 divides the accommodating cavity inside the cylindrical body 100 into the silencing chamber 120 and the separation chamber 130, and the separation chamber 130 is located below the silencing chamber 120.

[0038] In some embodiments of this invention described above, the cavity within the cylinder 100 is divided into an anechoic chamber 120 and a separation chamber 130 by a partition plate 110, with the separation chamber 130 located below the anechoic chamber 120. After the oil-gas mixture enters the lower separation chamber 130 from the inlet pipe 150, in addition to centrifugal or inertial forces, the lubricating oil droplets are also subjected to downward gravity. During the upward reversal of the airflow into the anechoic pipe 1010, large-diameter oil droplets can settle directly to the bottom oil pool, enabling the separation chamber 130 to achieve high separation efficiency within a relatively short length of the cylinder 100.

[0039] Understandably, the silencing chamber 120 and the separation chamber 130 are located within the same cylinder 100, resulting in a compact structure and small footprint. The separation chamber 130 is located at the lowest point, and an oil return hole can be installed at the bottom to directly return the oil to the compressor 200 suction pipe or oil trough. The separated lubricating oil flows by gravity, eliminating the need for complex ejector or differential pressure oil return devices and reducing the risk of oil return failure.

[0040] It should be noted that the isolation plate 110 can be set perpendicular to the axis of the cylinder 100, which facilitates welding between the isolation plate 110 and the cylinder 100 and facilitates the installation and assembly of the silencer pipe 1010; or it can be set at an acute angle to the axis of the cylinder 100, that is, the isolation plate 110 and the cylinder 100 are arranged at an angle, which facilitates the oil in the separation chamber 130 to flow down the isolation plate 110 to the bottom.

[0041] Optionally, the silencer pipe 1010 can be a straight pipe or other structures; the silencer pipe 1010 can be set in a vertical direction or inclined to the vertical direction.

[0042] In some embodiments of this utility model, the air inlet pipe 150 is disposed near the isolation plate 110, and the air inlet pipe 150 is perpendicular to the axis of the cylinder 100.

[0043] In some of the embodiments of this utility model described above, the air inlet pipe 150 is located near the isolation plate 110. When the oil-gas mixture entering through the air inlet pipe 150 encounters the obstruction of the wall of the isolation plate 110, the airflow direction is forced to change sharply from horizontal to downward or rotate along the cylinder wall, generating strong inertial collision and centrifugal effect. After the coarse oil droplets hit the lower surface of the isolation plate 110, they directly condense and drip down the isolation plate 110 to the bottom of the separation chamber 130, effectively ensuring the separation effect.

[0044] The axis of the air intake pipe 150 is perpendicular to the axis of the cylinder 100. The centrifugal force generated by the air intake causes large oil droplets to be thrown towards the cylinder wall. Then, the oil droplets naturally slide to the bottom by gravity, which can significantly improve the centrifugal sedimentation efficiency of the oil droplets.

[0045] It is understandable that the silencer pipe 1010 extends into the separation chamber 130. The inlet of the silencer pipe 1010 located in the separation chamber 130 is usually set in the lower or middle part of the separation chamber 130. The airflow enters from the position near the isolation plate 110, and the airflow can also flow along the outer wall of the silencer pipe 1010, thereby achieving the effect of oil-gas separation and improving separation efficiency.

[0046] In some preferred embodiments of this utility model, the air intake pipe 150 is disposed off the central axis of the silencing chamber 120, and the end of the air intake pipe 150 located in the separation chamber 130 is provided with a slanted cut 151, the direction of which is opposite to that of the silencing pipe 1010.

[0047] In some preferred embodiments of the present invention, the air intake pipe 150 is offset from the central axis of the silencer chamber 120, and the air intake pipe 150 is provided with a slanted cut 151, which can ensure tangential air intake in the separation chamber 130. The centrifugal force generated by the tangential air intake causes large oil droplets to be thrown towards the cylinder wall, and then the oil droplets naturally slide to the bottom by gravity.

[0048] Understandably, the oblique cut 151 causes the high-speed oil-gas mixture entering the separation chamber 130 to first rush towards the side wall of the separation chamber 130, rather than directly rushing towards the inlet of the silencer pipe 1010, forcing the airflow to rotate or turn back along the cylinder wall, increasing the centrifugal separation path.

[0049] In some embodiments of this utility model, an oil filter screen 160 is provided at the bottom of the separation chamber 130, and an oil return port 190 is provided at the bottom of the oil filter screen 160.

[0050] In some of the embodiments of this utility model described above, an oil filter screen 160 is provided at the bottom of the separation chamber 130, and the oil return port 190 is placed below the filter screen. After the oil-liquid mixture entering the air inlet pipe 150 enters the separation chamber 130, the lubricating oil separated by centrifugation, collision and gravity sedimentation is filtered through the filter screen, and the filtered clean lubricating oil is directly returned to the compressor 200 through the bottom oil return port 190.

[0051] In some embodiments of this utility model, the cross-section of the oil filter 160 is trapezoidal; and / or, the small-diameter end of the oil filter 160 is connected to the silencer pipe 1010.

[0052] In some embodiments of this invention described above, the oil filter screen 160, with a trapezoidal cross-section (narrower at the top and wider at the bottom), has its upper bottom connected to the silencer pipe 1010 and its lower bottom attached to the wall of the separation chamber 130. Compared to a flat filter screen, this conical or trumpet-shaped structure, which is smaller at the top and larger at the bottom, significantly increases the effective filtration area of ​​the filter screen (especially the wider lower area). Under the same return oil flow rate, a larger filtration area results in a lower oil flow velocity through the filter screen, thereby reducing local resistance loss and lowering the risk of impurities accumulating and clogging at local mesh openings.

[0053] Meanwhile, by connecting the small-diameter end of the oil filter screen 160 to the silencer pipe 1010, it can be ensured that the gas entering the silencer pipe 1010 comes into contact with the oil filter screen 160 as much as possible, thus ensuring the oil-gas separation effect.

[0054] In some embodiments of this utility model, the cross-section of the oil filter screen 160 is a triangular structure.

[0055] In some of the embodiments of this utility model described above, the oil filter 160 has a triangular cross-section, which can significantly increase the filtration area and dirt holding capacity. At the same time, the structural strength is enhanced. Under the continuous impact of high-pressure and high-temperature refrigerant gas flow, the triangular cross-section filter is less prone to collapse, twisting or breaking than the planar filter, thereby improving the structural reliability of the oil filter 160. In addition, when the high-speed airflow passes through the gaps of the triangular structure oil filter 160, the airflow path is deflected and turbulent, increasing the probability of collision between tiny oil droplets and the filter material surface. As an effective supplement to centrifugal separation, this further reduces the oil content in the gas.

[0056] In some embodiments of this utility model, a refrigerant filter 170 is provided inside the silencing chamber 120, and the refrigerant filter 170 is disposed between the silencing pipe 1010 and the exhaust port 140.

[0057] In some embodiments of this utility model described above, a refrigerant filter 170 is provided inside the silencing chamber 120, and this filter is located between the silencing pipe 1010 and the exhaust port 140, which can intercept small solid particles from upstream. The filtered clean refrigerant enters the outdoor unit exhaust pipe and the indoor system through the exhaust port 140, effectively preventing impurities from clogging the indoor unit's electronic expansion valve and capillary tube or causing uneven liquid distribution in the heat exchanger, significantly improving the operational reliability of the entire multi-split system.

[0058] Understandably, the oil filter 160 at the bottom of the separation chamber 130 mainly intercepts impurities in the lubricating oil in the return oil circuit to protect the compressor 200; while the refrigerant filter 170 in the silencer chamber 120 filters the refrigerant gas in the main exhaust path to protect the internal components.

[0059] In some embodiments of this utility model, the cross-section of the refrigerant filter 170 is a trapezoidal or triangular structure, and the large-diameter end of the refrigerant filter 170 faces the silencer pipe 1010.

[0060] In some of the embodiments of this utility model described above, the trapezoidal or triangular refrigerant filter can increase the filtration area and improve the filtration effect.

[0061] This utility model also provides an air conditioner, including the oil-gas separation device described above.

[0062] The air conditioner provided by this utility model includes the oil-gas separation device as described above, having a silencing chamber 120 and a separation chamber 130 separated from each other. The separation chamber 130 is separated from the silencing chamber 120 and connected by a silencing pipe 1010 extending into both the silencing chamber 120 and the separation chamber 130, forming a series flow path of separation followed by silencing. After the oil-gas mixture enters the separation chamber 130 from the inlet pipe 150, the lubricating oil and gas are first efficiently separated by centrifugation, collision, or gravity settling. Subsequently, when the gas enters the silencing chamber 120 through the silencing pipe 1010, it can achieve silencing, thereby effectively reducing the noise generated by the compressor 200 exhaust.

[0063] Example 1:

[0064] The oil-gas separation device provided by this utility model includes a cylinder 100, and an isolation plate 110 is provided inside the cylinder 100. The isolation plate 110 divides the accommodating cavity inside the cylinder 100 into the silencing chamber 120 and the separation chamber 130. The separation chamber 130 is located below the silencing chamber 120.

[0065] The cylinder 100 is provided with an exhaust port 140, the silencing chamber 120 is connected to the exhaust port 140, the separation chamber 130 is provided with an air inlet pipe 150, and the air inlet pipe 150 is located near the isolation plate 110.

[0066] The silencer pipe 1010 is installed on the isolation plate 110. The silencer pipe 1010 connects the silencer chamber 120 and the separation chamber 130. The silencer pipe 1010 is coaxially arranged with the cylinder 100 and extends into the silencer chamber 120 and the separation chamber 130 respectively. The oil-gas mixture entering from the air inlet pipe 150 flows through the separation chamber 130, the silencer pipe 1010, and the silencer chamber 120 in sequence and is discharged from the exhaust port 140.

[0067] Furthermore, a triangular-section oil filter 160 is provided at the bottom of the separation chamber 130, and an oil return port 190 is provided at the bottom of the oil filter 160. A triangular-section refrigerant filter 170 is provided inside the silencing chamber 120, and the refrigerant filter 170 is located between the silencing pipe 1010 and the exhaust port 140.

[0068] Furthermore, the air intake pipe 150 is offset from the central axis of the silencer chamber 120, and the end of the air intake pipe 150 located in the separation chamber 130 is provided with a slanted cut 151, the direction of which is opposite to that of the silencer pipe 1010.

[0069] Example 2:

[0070] The difference between this embodiment 2 and embodiment 1 is that: the silencing chamber 120 is provided with a plurality of partition plates 180, which divide the silencing chamber 120 into a plurality of silencing compartments 121. The silencing pipe 1010 passes through the plurality of partition plates 180 in sequence, and the silencing pipe 1010 located in each of the silencing compartments 121 is provided with a silencing hole 1020.

[0071] Example 3:

[0072] The difference between Embodiment 3 and Embodiment 2 is that the volumes of the multiple anechoic chambers 121 are different, and the sizes of the multiple anechoic holes 1020 are different. The anechoic chamber 120 uses an array of non-uniform volume anechoic chambers 121 in combination with anechoic holes 1020 of varying density to match the acoustic impedance at different frequencies. Through the principles of multiple reflections, interference, and resonance dissipation, it significantly reduces noise in different frequency bands.

[0073] Example 4:

[0074] This embodiment 4 provides an air conditioner, including the oil-gas separation device as described in embodiment 1, embodiment 2, or embodiment 3.

[0075] The air conditioner also includes a compressor 200, a condenser 300, a throttling device 400, an evaporator 500, and an oil return valve 600. The inlet pipe 150 of the oil-gas separator is connected to the compressor 200, and the outlet 140 is connected to the condenser 300. The refrigerant output by the compressor 200 is separated by the oil-gas separator and enters the condenser 300 for heat exchange and dissipation. After being depressurized and cooled by the throttling device 400, the refrigerant becomes a low-temperature, low-pressure liquid refrigerant, which flows through the evaporator 500 to absorb heat and evaporate, and finally becomes a gaseous refrigerant and returns to the suction port of the compressor 200. At the same time, the negative pressure of the system draws the refrigeration oil in the oil-gas separator into the compressor 200, thereby forming a complete refrigeration and lubrication cycle.

[0076] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] Of course, this invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An oil-gas separation device, characterized in that, include: A silencing chamber, wherein the silencing chamber is connected to the exhaust port; A separation chamber is provided separately from the silencing chamber, and the separation chamber is equipped with an air inlet pipe; A muffler pipe connects the muffler chamber and the separation chamber, and extends into the muffler chamber and the separation chamber respectively. The oil-gas mixture entering from the intake pipe flows sequentially through the separation chamber, the muffler pipe, and the muffler chamber before being discharged from the exhaust port. The air intake pipe is offset from the central axis of the silencer chamber, and the end of the air intake pipe located in the separation chamber is provided with a slanted cut, the direction of which is opposite to that of the silencer pipe.

2. The oil-gas separation device according to claim 1, characterized in that, The silencing chamber is provided with multiple partition plates, which divide the silencing chamber into multiple silencing sub-cavities. The silencing pipe passes through the multiple partition plates in sequence, and each silencing pipe located in each silencing sub-cavity is provided with a number of silencing holes.

3. The oil-gas separation device according to claim 2, characterized in that, The volumes of the multiple silencing cavities may be the same or different; and / or the sizes of the multiple silencing holes may be the same or different.

4. The oil-gas separation device according to any one of claims 1-3, characterized in that, The device includes a cylindrical body, and a partition plate is provided inside the cylindrical body. The partition plate divides the accommodating cavity inside the cylindrical body into a silencing chamber and a separation chamber, with the separation chamber located below the silencing chamber.

5. The oil-gas separation device according to claim 4, characterized in that, The air intake pipe is located near the partition plate and is perpendicular to the axis of the cylinder.

6. The oil-gas separation device according to claim 4, characterized in that, An oil filter screen is installed at the bottom of the separation chamber, and an oil return port is installed at the bottom of the oil filter screen.

7. The oil-gas separation device according to claim 6, characterized in that, The oil filter screen has a trapezoidal cross-section; and / or, the small-diameter end of the oil filter screen is connected to the silencer pipe.

8. The oil-gas separation device according to claim 6, characterized in that, The oil filter screen has a triangular cross-section.

9. The oil-gas separation device according to claim 4, characterized in that, A refrigerant filter is installed in the silencing chamber, and the refrigerant filter is located between the silencing pipe and the exhaust port.

10. The oil-gas separation device according to claim 9, characterized in that, The refrigerant filter has a trapezoidal or triangular cross-section, with the larger diameter end of the refrigerant filter facing the silencer pipe.

11. An air conditioner, characterized in that, Includes the oil-gas separation device as described in any one of claims 1-10.

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