Air suction silencer and compressor with same

Abstract

The utility model provides an air suction silencer and a compressor with the air suction silencer. The air suction silencer comprises a shell and an air inlet pipe. The air inlet pipe is installed on the shell, an outlet of the air inlet pipe is communicated with the silencing cavity of the shell, a first oil blocking flange is arranged on the outer edge of an inlet of the air inlet pipe, and an included angle is formed between the central axis of the air inlet pipe and the air inlet direction of refrigerants in the air inlet direction of the refrigerants. The first oil baffle flange is arranged at the inlet of the inlet pipe, so that most lubricating oil on the wall surface of the silencer flows back to an oil pool in the piston compressor under the action of gravity; the flow path of the air flow is changed by the included angle between the central axis of the air inlet pipe and the air inlet direction of the refrigerant, so that the air flow deflects before entering the air inlet pipe, and the deflection is beneficial to further separation of the oil mist.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, specifically relating to an intake muffler and a compressor having the intake muffler. Background Technology

[0002] In the traditional refrigerator piston compressor industry, the intake port of the suction muffler is generally aligned with the suction pipe of the housing to improve suction efficiency. However, this structure easily leads to lubricating oil being carried into the suction muffler by the suction airflow. On the one hand, the lubricating oil, after mixing with the gas, generates high pressure, which can easily damage the valve; on the other hand, the lubricating oil discharged through the exhaust system reduces the amount of lubricating oil inside the piston compressor housing, easily causing poor bearing lubrication, leading to wear of parts and serious reliability problems. Therefore, controlling the oil discharge of the piston compressor is very important for refrigerator piston compressors. Experimental studies have shown that most of the oil discharged by the piston compressor is drawn in by the suction muffler chamber. Related technologies disclose that by setting oil leakage holes and oil guides on the side wall of the suction muffler housing, the surface adsorption force of the oil is increased. When the collected oil droplets reach a certain weight, they can quickly drip into the bottom of the piston compressor housing, which can effectively reduce the amount of oil discharged by the piston compressor. This structure is mainly intended to improve the timely condensation of lubricating oil entering the intake muffler and returning it to the housing. However, in reality, because a large amount of oil mist is very close to the intake muffler outlet, under the action of pressure difference, most of the oil mist will be drawn into the piston compressor along with the refrigerant through the intake muffler outlet. After compression, it will be discharged into the refrigeration system, resulting in the piston compressor still having a high oil discharge rate. Utility Model Content

[0003] This utility model provides an intake muffler and a compressor having the intake muffler, which can solve the technical problem that the intake airflow easily carries lubricating oil into the intake muffler.

[0004] An intake muffler includes a housing and an intake pipe;

[0005] The intake pipe is installed on the housing, and the outlet of the intake pipe is connected to the silencing cavity of the housing. A first oil baffle flange is provided on the outer edge of the inlet of the intake pipe. In the direction of refrigerant intake, there is an angle between the central axis of the intake pipe and the direction of refrigerant intake.

[0006] In some embodiments, the air intake pipe is inclined downwards, with the cross-section of the housing as the projection plane.

[0007] In some embodiments, the first oil baffle flange has a connecting hole that communicates with the inlet of the air intake pipe, and the cross-sectional area of ​​the connecting hole is smaller than the cross-sectional area of ​​the inlet of the air intake pipe.

[0008] In some embodiments, a first filter screen is provided on the first oil baffle flange, and the first filter screen is located in the refrigerant flow path.

[0009] In some embodiments, a second filter screen is provided at the outlet of the air inlet pipe, and the second filter screen is located in the flow path of the refrigerant.

[0010] In some embodiments, the side wall of the air intake pipe is provided with an oil outlet hole, the oil outlet hole is close to the inlet of the air intake pipe, and the diameter of the oil outlet hole is d1, the value of the diameter d1 is in the range of 0.8 to 2 mm.

[0011] In some embodiments, the side wall of the housing is provided with an oil leakage hole, and an oil baffle ring is provided at the oil leakage hole. One end of the oil baffle ring is connected to the outer wall of the housing, and the other end of the oil baffle ring is provided with a second oil baffle flange.

[0012] In some embodiments, the end face of the housing where the air intake pipe is located is used as the projection plane, the vertical distance between the outer edge of the second oil baffle flange and the outer wall of the oil baffle ring is h1, the thickness of the second oil baffle flange is w1, the vertical distance h1 ranges from 2 to 5 mm, and the thickness w1 ranges from 1 to 4 mm.

[0013] In some embodiments, the housing includes a first housing and a second housing connected to each other. With the cross-section of the housing as the projection plane, the first housing is disposed above the second housing. An air outlet pipe is provided on the top of the first housing, and an air inlet pipe is installed on the second housing. An oil leakage hole is provided on the side wall of the second housing.

[0014] A compressor includes a housing, a suction pipe, and a suction muffler. The suction muffler is the suction muffler described above. The suction muffler is disposed in the housing. The suction pipe is mounted on the housing. With the cross-section of the compressor as the projection plane, there is an angle α between the central axis of the suction pipe and the central axis of the intake pipe. The value of the angle α is in the range of 30° to 65°.

[0015] The present invention provides an air intake silencer and a compressor having the air intake silencer, which have the following beneficial effects:

[0016] The first oil-blocking flange of this invention is installed at the inlet of the inlet pipe to guide the lubricating oil splashed onto the wall. This allows most of the lubricating oil on the muffler wall to flow back to the oil sump inside the piston compressor under gravity, preventing it from entering the intake muffler inlet along the wall. Compared to installing a baffle at the intake pipe, this embodiment features a simpler flange structure, lower cost, and easier implementation. Furthermore, the presence of the first oil-blocking flange alters the flow direction of the refrigerant gas, causing the airflow to collide with the flange before entering the intake pipe. This helps separate the oil mist from the refrigerant gas, making it easier for the oil mist to condense into oil droplets inside the intake muffler. The angle between the central axis of the intake pipe and the refrigerant intake direction changes the airflow path, causing the airflow to deflect before entering the intake pipe. This deflection further helps separate the oil mist and reduces the possibility of lubricating oil being carried into the intake pipe. Meanwhile, a reasonable angle setting optimizes airflow velocity, preventing excessively high airflow velocities from carrying lubricating oil into the intake pipe. This setting also ensures that the airflow has an appropriate velocity when entering the intake pipe, thereby improving suction efficiency. Through the synergistic effect of blocking, separating, and optimizing airflow direction, the angle setting of the first oil baffle and the intake pipe together reduces the amount of lubricating oil entering the piston compressor. This helps to reduce the oil discharge rate of the piston compressor and improve the compressor's reliability and operating efficiency. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the intake silencer according to an embodiment of the present utility model;

[0019] Figure 2 This is another schematic diagram of the intake silencer according to an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the first oil baffle flange according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the oil outlet through hole in an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the first filter screen according to an embodiment of the present utility model;

[0023] Figure 6This is a schematic diagram of the second filter screen according to an embodiment of the present utility model;

[0024] Figure 7 This is a schematic diagram of the compressor according to an embodiment of the present invention.

[0025] Attached Figures: 1-Shell; 11-First Shell; 12-Second Shell; 2-Inlet Pipe; 3-First Oil Baffle Flange; 301-Connecting Hole; 302-First Filter Screen; 303-Second Filter Screen; 304-Oil Outlet Hole; 4-Oil Leakage Hole; 401-Oil Baffle Ring; 402-Second Oil Baffle Flange; 5-Outlet Pipe; 61-Outer Shell; 62-Suction Pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0028] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used here to describe the spatial positional relationship of a device or feature as shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device as described in the figure. For example, if a device in the figure is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures.

[0029] See also Figures 1 to 3As shown, according to an embodiment of the present invention, an intake silencer is provided, which includes a housing 1 and an intake pipe 2; the intake pipe 2 is installed on the housing 1, the outlet of the intake pipe 2 is connected to the silencer cavity of the housing 1, and a first oil baffle flange 3 is provided on the outer edge of the inlet of the intake pipe 2. In the direction of refrigerant intake, the central axis of the intake pipe 2 has an angle with the direction of refrigerant intake.

[0030] Specifically, a silencing chamber is provided inside the housing 1, and an intake pipe 2 is installed on the housing 1. The outlet of the intake pipe 2 is connected to the silencing chamber, and the inlet of the intake pipe 2 is located outside the housing 1. The intake pipe 2 has a certain length, and a first oil baffle flange 3 is provided on the outer circle of the inlet of the intake pipe 2. Since there is an angle between the central axis of the intake pipe 2 and the direction of refrigerant intake, that is, the inlet of the intake pipe 2 is not set opposite to the direction of refrigerant intake, when the intake silencer draws in refrigerant, the refrigerant has to flow through a certain distance and first flow through the first oil baffle flange 3 before entering the intake pipe 2.

[0031] In this embodiment, the first oil-blocking flange 3 is located at the inlet of the intake pipe 2 to guide the lubricating oil splashed onto the wall. This allows most of the lubricating oil on the muffler wall to flow back to the oil sump inside the piston compressor under gravity, preventing it from entering the intake muffler inlet along the wall. Compared to setting a baffle at the intake pipe 2, this embodiment has a simpler flange structure, lower cost, and is easier to implement. Furthermore, the presence of the first oil-blocking flange 3 changes the flow direction of the refrigerant gas, causing the gas to collide with the flange before entering the intake pipe 2. This helps separate the oil mist in the gas flow from the refrigerant gas, making it easier for the oil mist to condense into oil droplets inside the intake muffler.

[0032] In this embodiment, the angle between the central axis of the intake pipe 2 and the refrigerant intake direction alters the airflow path, causing the airflow to deflect before entering the intake pipe 2. This deflection helps to further separate oil mist and reduces the possibility of lubricating oil being carried into the intake pipe 2. Simultaneously, a reasonable angle setting optimizes the airflow velocity, preventing excessively high airflow velocities from carrying lubricating oil into the intake pipe 2. This setting also ensures that the airflow has an appropriate velocity upon entering the intake pipe 2, thereby improving suction efficiency. Through the synergistic effect of blocking, separating, and optimizing the airflow direction, the angle setting of the first oil baffle flange 3 and the intake pipe 2 together reduces the amount of lubricating oil entering the piston compressor. This helps to reduce the oil discharge rate of the piston compressor and improve the compressor's reliability and operating efficiency.

[0033] See also Figures 1 to 3 As shown, with the cross-section of the housing 1 as the projection plane, the air intake pipe 2 is inclined downwards.

[0034] Specifically, in this embodiment, the central axis of the intake pipe 2 has an angle with the direction of refrigerant intake, that is, the intake pipe 2 and the direction of refrigerant intake are not directly opposite each other. When the refrigerant enters in a horizontal direction, whether the intake pipe 2 is set upward or downward, the flow path of the refrigerant can be increased. The preferred method in this embodiment is that the intake pipe 2 is set downward.

[0035] In this embodiment, when the refrigerant enters horizontally, the downward tilt of the intake pipe 2 increases the refrigerant's flow path. This causes the refrigerant to travel a longer distance before entering the intake pipe 2, thereby increasing the chance of lubricating oil separating from the refrigerant. Furthermore, the longer flow path and tilt angle help oil mist condense into larger droplets within the intake muffler. These droplets are more likely to return to the bottom of the piston compressor housing 1 under gravity. The synergistic effect of the downward tilt of the intake pipe 2 and the first oil-blocking component not only effectively blocks lubricating oil from entering the intake pipe 2 but also further promotes the separation and condensation of oil mist by changing the airflow direction and speed. This synergistic effect plays a crucial role in reducing oil discharge, improving compressor lubrication, and reducing the risk of system failure.

[0036] See also Figures 1 to 4 As shown, the first oil baffle flange 3 has a connecting hole 301, which is connected to the inlet of the air intake pipe 2, and the cross-sectional area of ​​the connecting hole 301 is smaller than the inlet cross-sectional area of ​​the air intake pipe 2.

[0037] Specifically, the first oil baffle flange 3 can cover part of the inlet of the intake pipe 2. In order to ensure that the refrigerant can flow into the intake pipe 2, the first oil baffle flange 3 is provided with a connecting hole 301. The connecting hole 301 serves to connect with the intake pipe 2. The refrigerant first flows into the connecting hole 301. The refrigerant collides with the connecting hole 301 and can perform gas-liquid separation. Then it flows into the inlet of the intake pipe 2 and enters the silencer chamber inside the housing 1.

[0038] In this embodiment, when the refrigerant flows into the connecting hole 301, due to the small cross-sectional area of ​​the connecting hole 301, the airflow velocity increases according to the principle of flow conservation. This velocity change helps the gas and liquid phases in the refrigerant to collide and separate. The smaller cross-sectional area of ​​the connecting hole 301 restricts and obstructs the airflow before it enters the intake pipe 2, increasing the turbulence. This turbulence facilitates the separation of lubricating oil droplets from the refrigerant gas, making it easier for the lubricating oil droplets to condense into larger droplets in the intake muffler, thereby reducing the amount of lubricating oil entering the intake pipe 2. Furthermore, the cross-sectional area of ​​the connecting hole 301 is smaller than the inlet cross-sectional area of ​​the intake pipe 2, which allows for some control of the refrigerant flow rate entering the intake pipe 2. This prevents excessive refrigerant from entering the intake pipe 2 at once, thereby optimizing the intake efficiency and making the intake process more stable. Because the cross-sectional area of ​​the connecting hole 301 is small, the amount of lubricating oil entering the intake pipe 2 is reduced. At the same time, the smaller cross-sectional area of ​​the connecting hole 301 also helps the lubricating oil to form larger oil droplets in the intake muffler. These larger oil droplets are more likely to drip into the bottom of the piston compressor housing 1 more quickly under the action of gravity, thus improving the return efficiency of the lubricating oil.

[0039] See also Figures 1 to 4 As shown, a first filter screen 302 is provided on the first oil baffle flange 3, and the first filter screen 302 is located in the flow path of the refrigerant.

[0040] Specifically, in this embodiment, a first filter screen 302 is installed on the first oil baffle flange 3. The outer edge of the first oil baffle flange 3 is larger than the outer diameter of the air inlet pipe 2. Regarding the installation position of the first filter screen 302, it can be installed on the outer end face of the first oil baffle flange 3, with a cross-sectional area larger than the inlet area of ​​the air inlet pipe 2, or it can be embedded in the connecting hole 301. The specific installation method is fixing it with a heating wire, which is simple and convenient. When refrigerant carrying droplets flows through the filter screen, the droplets in the gas collide with and adhere to the filter screen. Upon reaching the contact point between the two wires, due to the capillary action of the gap at the contact point and the surface tension of the liquid, the droplets stop flowing downwards. Until the accumulated droplets reach a certain size, their gravity exceeds the combined force of the surface tension and the rising gas, causing the droplets to fall and achieving the purpose of oil-gas separation.

[0041] In this embodiment, the microporous structure of the first filter 302 can effectively intercept smaller droplets, further improving the efficiency of gas-liquid separation. The first filter 302 is located in the flow path of the refrigerant and can effectively block lubricating oil from entering the intake pipe 2. Even if a small amount of lubricating oil enters the refrigerant, the first filter 302 can intercept and separate it, reducing the possibility of lubricating oil entering the piston compressor. In this way, the first filter 302 helps to reduce the oil discharge rate of the piston compressor and improve the reliability and operating efficiency of the compressor.

[0042] As a specific implementation method, the first oil baffle flange 3 is square in shape. The square structure is conducive to increasing the cross-sectional area of ​​the orifice, thereby increasing the orifice expansion ratio. This is beneficial to improving the silencer's noise reduction. It also has high rigidity, which can better withstand the pressure and impact generated during the refrigerant flow, thereby improving the stability and reliability of the flange. At the same time, the square structure facilitates the fixing of the filter screen.

[0043] See also Figures 1 to 6 As shown, a second filter 303 is provided at the outlet of the air inlet pipe 2, and the second filter 303 is located on the flow path of the refrigerant.

[0044] Specifically, the second filter 303 is designed to fit against the inner wall of the housing 1. The second filter 303 can cover the outlet of the air inlet pipe 2. The second filter 303 is located on the flow path of the refrigerant. When the refrigerant flows out from the air inlet pipe 2, the liquid droplets in the gas collide with the filter and adhere to it. These droplets gather on the filter and form larger droplets, which eventually drip off under the action of gravity, further realizing gas-liquid separation.

[0045] In this embodiment, the second filter 303 effectively prevents lubricating oil from entering the muffler chamber within the housing 1. Even if a small amount of lubricating oil enters the intake pipe 2 along with the refrigerant, the second filter 303 can intercept and separate it, reducing the amount of lubricating oil entering the muffler chamber. This helps maintain the cleanliness of the muffler chamber and improves the performance and reliability of the intake muffler. The presence of the second filter 303 can also buffer the flow of refrigerant, making the speed and pressure of the refrigerant more stable before entering the muffler chamber. This helps optimize the intake process, improve intake efficiency, and ensure the stable operation of the piston compressor.

[0046] In one specific implementation, this embodiment simultaneously provides a first filter 302 and a second filter 303. The arrangement of the two filters is equivalent to filtering and separating the refrigerant flowing through the inlet and outlet of the intake pipe 2. The first filter 302 and the second filter 303 are made of stainless steel, with a mesh spacing of 0.15 to 0.4 mm and a wire diameter of φ0.05 to 0.1 mm. The cross-sectional area of ​​both filters is larger than the inlet and outlet area of ​​the intake pipe 2, and they can be fixedly connected by ultrasonic welding or snap fasteners.

[0047] In this embodiment, a dual filtration mechanism is employed. The first filter 302 is located at the inlet of the intake pipe 2, responsible for initial gas-liquid separation and intercepting larger oil droplets. The second filter 303 is located at the outlet of the intake pipe 2, performing secondary filtration on the refrigerant passing through the first filter 302 and intercepting smaller oil droplets. This dual filtration mechanism significantly improves the efficiency of gas-liquid separation. In other embodiments, the first filter 302 can be configured to intercept larger oil droplets, while the second filter 303 can intercept even smaller oil droplets. This layered interception method ensures that oil droplets of different sizes can be effectively separated. The first filter 302, as the first line of defense, intercepts most of the lubricating oil, reducing the amount of oil entering the intake pipe 2. The second filter 303, as the second line of defense, further intercepts lubricating oil that may enter the muffler cavity with the refrigerant, ensuring the cleanliness of the muffler cavity.

[0048] See also Figures 1 to 6 As shown, an oil outlet hole 304 is provided on the side wall of the intake pipe 2. The oil outlet hole 304 is close to the inlet of the intake pipe 2. The diameter of the oil outlet hole 304 is d1, and the value of the diameter d1 ranges from 0.8 to 2 mm.

[0049] Specifically, with the cross-section of the housing 1 as the projection plane, the intake pipe 2 is inclined downwards. The first oil baffle flange 3, the first filter screen 302 and the second filter screen 303 inevitably have oil droplets after gas-liquid separation. The oil droplets in the intake pipe 2 can flow along the inner wall of the intake pipe 2 to the oil outlet hole 304 under the influence of gravity, and flow out in the oil outlet hole 304, so that the lubricating oil droplets in the filtered refrigerant can quickly flow back to the oil sump.

[0050] In this embodiment, the oil outlet orifice 304 is located near the inlet of the intake pipe 2, and the orifice diameter d1 ranges from 0.8 to 2 mm. This design allows the lubricating oil to flow out quickly under gravity, while avoiding refrigerant leakage that might occur due to an excessively large orifice diameter. The lubricating oil flows along the inner wall of the intake pipe 2 to the oil outlet orifice 304 and then flows out. This design ensures that the lubricating oil can quickly and effectively return to the oil sump, reducing the residence time of the lubricating oil in the system. By quickly returning the lubricating oil to the oil sump, the oil outlet orifice 304 helps maintain the cleanliness of the compressor's interior, preventing lubricating oil from accumulating throughout the system, thereby improving the overall performance and stability of the refrigeration system. This not only helps improve the compressor's operating efficiency but also reduces the risk of malfunctions caused by lubricating oil accumulation.

[0051] See also Figures 1 to 6 As shown, an oil leakage hole 4 is provided on the side wall of the housing 1, and an oil baffle ring 401 is provided at the oil leakage hole 4. One end of the oil baffle ring 401 is connected to the outer wall of the housing 1, and a second oil baffle flange 402 is provided at the other end of the oil baffle ring 401.

[0052] Specifically, an oil leakage hole 4 is provided on the side wall of the intake muffler. When the oil mist inside the intake muffler condenses to a certain amount, it will flow downward along the inner wall of the muffler under the action of gravity and finally flow out through the oil leakage hole 4. An oil baffle ring 401 and a second oil baffle flange 402 are provided at the oil leakage hole 4 to separate the refrigerant outside the housing 1 into gas and liquid. They can also allow oil droplets to adhere to the oil baffle ring 401 and the second oil baffle flange 402, which facilitates the fall and return of the oil droplets.

[0053] In this embodiment, the intake muffler oil drain hole 4 is located on the side wall of the muffler, rather than at the bottom of the housing 1. This effectively avoids the risk that lubricating oil will be drawn into the muffler and then into the cylinder during vibration of the mechanism. The main function of the oil baffle ring 401 is to prevent lubricating oil from leaking out of the oil drain hole 4. By blocking the flow path of the lubricating oil, it ensures that the lubricating oil will not splash or leak into the external environment. The second oil baffle flange 402 further enhances the oil baffle effect and works in conjunction with the oil baffle ring 401 to ensure that lubricating oil does not leak out of the oil drain hole 4. By preventing lubricating oil leakage and promoting lubricating oil return, the oil baffle ring 401 and the second oil baffle flange 402 help reduce the accumulation of lubricating oil in the system, thereby improving the stability and reliability of the system.

[0054] In one specific implementation, the oil baffle ring 401 has a semi-circular arc structure, and the corresponding second oil baffle flange 402 has a fan-shaped structure. This reduces the amount of lubricating oil on the surface of the intake muffler being drawn into the muffler under negative pressure. Compared with the traditional structure, the oil baffle ring 401 in this embodiment has a fan-shaped flange structure at the end face of the orifice. This flange protrusion can prevent the lubricating oil on the muffler housing 1 from spreading along the wall to the oil leakage hole 4. This allows the oil to be drawn into the muffler due to the pressure difference caused by the pressure difference between the internal and external pressures of the piston compressor during operation, thus reducing the amount of oil discharged by the piston compressor.

[0055] See also Figures 1 to 6 As shown, with the end face of the housing 1 where the air inlet pipe 2 is provided as the projection plane, the vertical distance between the outer edge of the second oil baffle flange 402 and the outer wall of the oil baffle ring 401 is h1, the thickness of the second oil baffle flange 402 is w1, the vertical distance h1 ranges from 2 to 5 mm, and the thickness w1 ranges from 1 to 4 mm.

[0056] In this embodiment, the defined vertical distance h1 and thickness ensure a safe distance between the muffler and the compressor housing 61, preventing the core from colliding with the housing. Furthermore, the reasonable range of vertical distance h1 and thickness w1 allows lubricating oil to effectively adhere to the oil baffle ring 401 and the second oil baffle flange 402. When lubricating oil drips onto the oil baffle ring 401 and the second oil baffle flange 402, the appropriate distance and thickness ensure that the lubricating oil falls smoothly under gravity, quickly returning to the oil sump. The appropriate thickness w1 prevents lubricating oil from splashing during high-speed flow or rotation, ensuring that the lubricating oil flows smoothly along the surfaces of the oil baffle ring 401 and the second oil baffle flange 402. This ensures that the lubricating oil ejected from the crankshaft through the oil hole flows back to the bottom oil sump of the compressor housing 1 after splashing onto the outer surface of the muffler, guaranteeing a sufficient oil level in the oil sump. Additionally, the overall structure is simple, reducing costs.

[0057] See also Figures 1 to 6 As shown, the housing 1 includes a first housing 11 and a second housing 12 connected to each other. With the cross-section of the housing 1 as the projection plane, the first housing 11 is located above the second housing 12. The top of the first housing 11 is provided with an air outlet pipe 5, the air inlet pipe 2 is installed on the second housing 12, and the side wall of the second housing 12 is provided with an oil leakage hole 4.

[0058] Specifically, the first housing 11 and the second housing 12 can be connected and sealed by heating steel wire or secondary injection molding. After the first housing 11 and the second housing 12 are connected, a silencing chamber is formed inside. The refrigerant flows through the first oil baffle flange 3 and enters the intake pipe 2, and then enters the silencing chamber. After being silenced, the refrigerant flows out of the silencer from the outlet pipe 5 and is drawn into the compressor's suction chamber.

[0059] In this embodiment, the intake pipe 2 is disposed on the second housing 12, and the exhaust pipe 5 is disposed on the top of the first housing 11, thus separating the intake and exhaust paths and avoiding mutual interference between them. This structural arrangement allows the refrigerant to enter the intake muffler more smoothly and be discharged through the exhaust pipe 5 at the top of the first housing 11, improving intake efficiency. The oil leakage hole 4 disposed on the side wall of the second housing 12 allows the lubricating oil inside the intake muffler to flow out under gravity. After flowing out through the oil leakage hole 4, the lubricating oil can quickly flow back to the oil sump, reducing the residence time of the lubricating oil in the system and improving the lubricating oil recovery efficiency.

[0060] See also Figure 7As shown, a compressor includes a housing 61, a suction pipe 62, and a suction muffler. The suction muffler is the suction muffler described above. The suction muffler is disposed in the housing 61. The suction pipe 62 is mounted on the housing 61. With the cross-section of the compressor as the projection plane, there is an angle α between the central axis of the suction pipe 62 and the central axis of the intake pipe 2. The value of the angle α ranges from 30° to 65°.

[0061] Specifically, the included angle α must be greater than 45°. The refrigerant circulating in the system is drawn in by the suction pipe 62, flows a certain distance and then flows into the intake pipe 2, enters the silencer chamber of the housing 1, and flows out from the silencer after the refrigerant is silenced.

[0062] In this embodiment, by setting an included angle α, the refrigerant's intake direction is guided to a direction that is not directly aligned with the inlet of the intake pipe 2. This setting helps to change the refrigerant's flow path, thereby increasing airflow turbulence and mixing before entering the muffler, which aids in gas-liquid separation. Setting the included angle α optimizes the airflow velocity, preventing excessively high airflow velocities from carrying lubricating oil into the intake pipe 2. Simultaneously, this setting ensures that the airflow has an appropriate velocity upon entering the intake pipe 2, thereby improving intake efficiency. Setting the included angle α reduces the direct impact of refrigerant on the inlet of the intake pipe 2, thus reducing the resulting noise and vibration. Furthermore, by changing the airflow direction, direct reflection and refraction of the airflow inside the muffler can be reduced, thereby improving the muffler's acoustic performance.

[0063] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0064] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An intake silencer, characterized in that, include: The housing (1) and the air intake pipe (2); The intake pipe (2) is installed on the housing (1). The outlet of the intake pipe (2) is connected to the silencing cavity of the housing (1). A first oil baffle flange (3) is provided on the outer edge of the inlet of the intake pipe (2). In the direction of refrigerant intake, the central axis of the intake pipe (2) has an angle with the direction of refrigerant intake.

2. The intake silencer according to claim 1, characterized in that, With the cross-section of the housing (1) as the projection plane, the air intake pipe (2) is inclined downward.

3. The intake silencer according to claim 1, characterized in that, The first oil baffle flange (3) has a connecting hole (301) that is connected to the inlet of the air inlet pipe (2), and the cross-sectional area of ​​the connecting hole (301) is smaller than the inlet cross-sectional area of ​​the air inlet pipe (2).

4. The intake silencer according to claim 1, characterized in that, The first oil baffle flange (3) is provided with a first filter screen (302), which is located in the flow path of the refrigerant.

5. The intake silencer according to claim 2, characterized in that, A second filter (303) is provided at the outlet of the air inlet pipe (2), and the second filter (303) is located on the flow path of the refrigerant.

6. The intake silencer according to claim 5, characterized in that, The side wall of the air intake pipe (2) is provided with an oil outlet hole (304). The oil outlet hole (304) is close to the inlet of the air intake pipe (2). The diameter of the oil outlet hole (304) is d1, and the value of the diameter d1 is in the range of 0.8 to 2 mm.

7. The intake silencer according to claim 1, characterized in that, The side wall of the housing (1) is provided with an oil leakage hole (4), and an oil baffle ring (401) is provided at the oil leakage hole (4). One end of the oil baffle ring (401) is connected to the outer wall of the housing (1), and the other end of the oil baffle ring (401) is provided with a second oil baffle flange (402).

8. The intake silencer according to claim 7, characterized in that, With the end face of the housing (1) where the air inlet pipe (2) is provided as the projection plane, the vertical distance between the outer edge of the second oil baffle flange (402) and the outer wall of the oil baffle ring (401) is h1, the thickness of the second oil baffle flange (402) is w1, the vertical distance h1 ranges from 2 to 5 mm, and the thickness w1 ranges from 1 to 4 mm.

9. The intake silencer according to claim 1, characterized in that, The housing (1) includes a first housing (11) and a second housing (12) connected to each other. With the cross-section of the housing (1) as the projection plane, the first housing (11) is disposed above the second housing (12). An air outlet pipe (5) is provided on the top of the first housing (11). An air inlet pipe (2) is installed on the second housing (12). An oil leakage hole (4) is provided on the side wall of the second housing (12).

10. A compressor, comprising a housing (61), a suction pipe (62), and a suction muffler, characterized in that, The intake silencer is the intake silencer according to any one of claims 1 to 9. The intake silencer is disposed in the housing (61). The intake pipe (62) is installed on the housing (61). With the cross-section of the compressor as the projection plane, the central axis of the intake pipe (62) and the central axis of the intake pipe (2) have an angle α. The value of the angle α is in the range of 30 to 65°.

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