Oil separator and heating installation

Abstract

The application discloses an oil separator and a heating and ventilation device. The oil separator comprises a barrel and a lead-out pipe. The barrel has a separation cavity and a mounting channel communicating with the separation cavity. The lead-out pipe comprises a first out pipe and a second out pipe which are formed separately. The first out pipe is connected with the barrel and at least partially located in the barrel. One end of the first out pipe and one end of the second out pipe are connected and communicated in the mounting channel. Part of the second out pipe is located outside the barrel. The material of the first out pipe is different from that of the second out pipe. The technical scheme can reduce the cost of the oil separator.

Description

Technical Field

[0001] This application relates to the field of heating, ventilation and air conditioning (HVAC) technology, and in particular to an oil separator and HVAC equipment. Background Technology

[0002] Some HVAC equipment, such as air conditioners, uses compressors to compress refrigerant gas, thereby achieving cooling and heating functions. During operation, lubricating oil is needed to lubricate the internal components of the compressor, improving its service life and reliability. To reduce or prevent lubricating oil from entering the cooling and heating cycle with the refrigerant gas and affecting the equipment's performance and structural reliability, HVAC equipment often includes an oil separator connected to the compressor's discharge side to separate the oil contained in the refrigerant.

[0003] In related technologies, the entire pipe used to drain refrigerant in the oil separator is made of copper for connection with external pipelines. This would undoubtedly increase costs during mass production and hinder economic efficiency. Utility Model Content

[0004] This application provides an oil separator and HVAC equipment that can reduce the cost of the oil separator.

[0005] In a first aspect, embodiments of this application provide an oil separator, comprising:

[0006] A cylindrical body having a separation cavity and an installation channel communicating with the separation cavity; and

[0007] The outlet tube includes a first outlet tube and a second outlet tube formed separately. The first outlet tube is connected to the cylinder and is at least partially located inside the cylinder. One end of the first outlet tube and one end of the second outlet tube are connected and communicate with each other in the installation channel. A portion of the second outlet tube is located outside the cylinder.

[0008] The material of the first outlet tube is different from that of the second outlet tube.

[0009] In this embodiment, the outlet pipe is configured as two parts: a first outlet pipe and a second outlet pipe, which are connected. The first outlet pipe is located inside the cylinder and connected to it, while the second outlet pipe is located outside the cylinder and connected to the first outlet pipe. The second outlet pipe is used to connect to the external piping of the HVAC equipment, and therefore uses a suitable material, such as copper. The first outlet pipe does not need to be directly connected to external piping, so it can be made of a different material, such as steel, while still fulfilling its function. It is understood that compared to related technologies where the outlet pipe is a single, integral pipe made entirely of copper, the technical solution of this embodiment allows for different materials for the first and second outlet pipes, which helps reduce costs.

[0010] In addition, the first and second outlet pipes are connected within the installation channel, which not only facilitates installation but also reduces or avoids refrigerant leakage, thereby improving the safety and reliability of the oil separator.

[0011] In one embodiment, one end of the first outlet tube and one end of the second outlet tube are sleeved within the mounting channel. This improves the convenience and tightness of the connection between the first and second outlet tubes.

[0012] In one embodiment, the portions of the first outlet pipe and the second outlet pipe that are interlocked are connected by welding. This welding method ensures a more secure connection between the first and second outlet pipes, provides a better seal, and prevents leakage.

[0013] In one embodiment, the end of the first outlet tube is sleeved outside the end of the second outlet tube. This allows for easier assembly when the first and second outlet tubes are first sleeved together and assembled into the cylinder.

[0014] In one embodiment, the projections of the second outlet pipe onto the inner wall of the mounting channel and the projections of the first outlet pipe onto the inner wall of the mounting channel overlap. The width of the overlapping portion along the axial direction of the mounting channel is h, satisfying the relationship 2mm ≤ h ≤ 15mm. Understandably, if h < 2mm, the welding length is insufficient, affecting the connection stability; if h > 15mm, the solder cannot completely cover the weld, affecting the welding effect. Therefore, to ensure welding effect and connection stability, this embodiment limits 2mm ≤ h ≤ 15mm.

[0015] In one embodiment, the first outlet pipe is welded to the cylinder body; at least one of the outer wall of the first outlet pipe and the inner wall of the mounting channel is provided with a protrusion to define a welding gap between the outer wall of the first outlet pipe and the inner wall of the mounting channel. Thus, the welding of the first outlet pipe to the cylinder body ensures high connection reliability. Furthermore, the first outlet pipe, the second outlet pipe, and the cylinder body can be connected in a single welding operation, reducing repetitive operations and improving production efficiency.

[0016] In one embodiment, the side wall of the cylinder is provided with an air inlet communicating with the separation chamber, and in the height direction of the oil separator, the end of the first outlet pipe away from the second outlet pipe is located below the air inlet;

[0017] The height difference between the end of the first outlet pipe furthest from the second outlet pipe and the central axis of the air inlet is H1, and the height difference between the end of the first outlet pipe furthest from the second outlet pipe and the bottom of the separation chamber is H2, satisfying the relationship 0.1≤H1 / H2≤0.6, to ensure high oil separation efficiency.

[0018] In one embodiment, the side wall of the cylinder is provided with an air inlet communicating with the separation chamber, and the central axis of the air inlet is spaced apart from the central axis of the cylinder. In this way, the mixed fluid entering the separation chamber can form a spiral, facilitating the separation of oil droplets.

[0019] In one embodiment, an air inlet pipe is also included, which passes through the air inlet. The opening of one end of the air inlet pipe located in the separation chamber is inclined toward the first outlet pipe. This is to avoid interference between the air inlet pipe and the first outlet pipe, and to further make the mixed fluid entering the separation chamber flow spirally along the cylinder wall, thereby improving the oil separation efficiency.

[0020] In one embodiment, the inner diameter of the intake pipe is d1, and the cylinder includes a main body defining the separation chamber, the inner diameter of the main body being d2, satisfying the relationship 1.5≤d2 / d1≤4, to improve oil separation efficiency.

[0021] In one embodiment, the cylinder is further provided with an oil guide channel communicating with the separation chamber, and the oil guide channel is located at the bottom of the cylinder along the height direction of the oil separator;

[0022] The oil separator also includes a filter assembly located within the oil guide channel. This filter assembly filters out foreign matter, preventing blockages in subsequent pipelines.

[0023] In one embodiment, the filter assembly includes:

[0024] The substrate is fixed within the oil guide channel and defines the oil outlet; and

[0025] A filter screen is connected to the substrate and covers the oil inlet. The filter screen arches towards the separation chamber relative to the substrate to increase the effective contact area between the filter screen and the oil, thereby improving the filtration effect.

[0026] In one embodiment, the system further includes an oil guide tube, one end of which is installed in the oil guide channel. The oil guide channel has a first limiting surface, and the substrate is sandwiched between the end of the oil guide tube and the first limiting surface for easy assembly.

[0027] In one embodiment, the substrate includes a filter screen fixing part surrounding the oil inlet, and the end face of the filter screen fixing part facing the first limiting surface is constructed as a second limiting surface, which abuts against the first limiting surface. In this way, the connection between the substrate and the filter screen is constructed as the second limiting surface. While ensuring the filtration function, there is no need to design the substrate in a lot, the structure is simple, and the cost is reduced.

[0028] Alternatively, along the axial direction of the oil guide channel, the middle portion of the substrate is provided with a second limiting surface facing the first limiting surface, the second limiting surface abutting against the first limiting surface. This allows the filter screen to extend into the separation chamber as much as possible, increasing the contact area between the filter screen and the oil, and improving the filtration effect.

[0029] In one embodiment, the oil guide pipe is welded to the inner wall of the oil guide channel, resulting in high connection reliability and good sealing performance.

[0030] In one embodiment, the cylindrical body includes:

[0031] The cylindrical body defines the separation cavity;

[0032] A first reduced-diameter section connects to one end of the cylindrical body and defines the mounting channel; the inner diameter of the first reduced-diameter section is smaller than the inner diameter of the cylindrical body.

[0033] The second reduced diameter section connects to the end of the cylinder body away from the first reduced diameter section and defines the oil guide channel. The inner diameter of the second reduced diameter section is smaller than the inner diameter of the cylinder body.

[0034] This facilitates the connection and assembly of the cylinder with the oil guide pipe and the outlet pipe.

[0035] In one embodiment, the cylinder body includes a first transition section that connects to the first reduced-diameter section, and the inner diameter of the first transition section gradually decreases along the direction close to the first reduced-diameter section. This creates a smooth transition between the main body of the cylinder body and the first reduced-diameter section, facilitating processing.

[0036] In one embodiment, the cylinder body includes a second transition section connected to the second reduced-diameter section, and the inner diameter of the second transition section gradually decreases along the direction close to the reduced-diameter section. This not only facilitates the machining of the cylinder body, but the second transition section also serves to collect oil and guide it through the oil guide channel, improving oil discharge efficiency.

[0037] In one embodiment, the cylinder is a single, integral component, offering good integrity and sealing, and facilitating manufacturing. And / or,

[0038] The outer diameter d3 of the main body of the cylinder satisfies the condition 30mmn≤d3≤60mm, so as to make the cylinder smaller and ensure oil separation efficiency.

[0039] Secondly, embodiments of this application also provide a heating, ventilation, and air conditioning (HVAC) device, characterized in that it includes:

[0040] compressor;

[0041] Condenser; and

[0042] As described in any of the above, the oil separator has a second outlet pipe connected to the condenser, and the oil separator further includes an inlet pipe connected to the outlet end of the compressor. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of an embodiment of the oil separator of this application;

[0045] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the oil separator at section AA;

[0046] Figure 3 This is an enlarged structural diagram of the connection between the first and second outlet pipes in this application.

[0047] Figure 4 This is a top-view cross-sectional structural diagram of an embodiment of the oil separator of this application;

[0048] Figure 5 for Figure 2 Schematic diagram of the structure at point B;

[0049] Figure 6 This is a top view of a structural schematic diagram of an embodiment of the filter assembly of this application;

[0050] Figure 7 for Figure 6 A cross-sectional view of the middle filter assembly at interface CC.

[0051] Figure 8 for Figure 6 A cross-sectional view of another embodiment of the filter assembly at interface CC.

[0052] Explanation of icon numbers:

[0053] 100. Oil separator; 10. Cylinder body; 11. Cylinder body; 111. First transition section; 113. Second transition section; 115. Separation chamber; 117. Air inlet; 13. First diameter reduction section; 131. Installation channel; 15. Second diameter reduction section; 151. Oil guide channel; 153. First limiting surface; 30. Outlet pipe; 31. First outlet pipe; 311. Welding gap; 33. Second outlet pipe; 50. Air inlet pipe; 70. Oil guide pipe; 90. Filter assembly; 91. Matrix; 911. Second limiting surface; 93. Filter.

[0054] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0056] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0057] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0059] One aspect of this application provides a heating, ventilation, or air conditioning device, which is used for heating, ventilation, or air conditioning, such as an air conditioner.

[0060] In some embodiments, the HVAC equipment includes a compressor, a condenser, an expansion valve, an evaporator, and an oil separator. The compressor compresses refrigerant, which then exchanges heat with air and condenses in the condenser. The condensed refrigerant flows through the expansion valve and expands, exchanging heat with air and evaporating. Optionally, when the HVAC equipment operates as a cooler, the evaporator may correspond to an indoor heat exchanger located in an indoor space, and the condenser may correspond to an outdoor heat exchanger located in an outdoor space; when the HVAC equipment operates as a heater, the evaporator may correspond to an outdoor heat exchanger located in an outdoor space, and the condenser may correspond to an indoor heat exchanger located in an indoor space.

[0061] During compressor operation, lubricating oil is required to lubricate the internal components, improving the compressor's lifespan and reliability. To reduce or prevent lubricating oil from entering the refrigeration and heating cycles with the refrigerant gas, thus affecting the working efficiency and structural reliability of HVAC equipment, an oil separator is connected between the compressor and the condenser to separate the oil contained in the refrigerant. In related technologies, the refrigerant outlet pipe in the oil separator is made entirely of copper for connection to external piping. This undoubtedly increases costs during mass production and is detrimental to economic efficiency.

[0062] To address the above problems, this application proposes an oil separator 100. Please refer to... Figure 1 and Figure 2 In some embodiments, the oil separator 100 includes a cylinder 10, an inlet pipe 50, an outlet pipe 30, and an oil guide pipe 70. The inlet pipe 50, the outlet pipe 30, and the oil guide pipe 70 are all connected to the cylinder 10. The inlet pipe 50 is used to introduce refrigerant into the cylinder 10, where the refrigerant is separated into oil droplets. The outlet pipe 30 is used to export the refrigerant after oil droplet separation to an external pipeline. The oil guide pipe 70 is used to export the oil droplets separated from the refrigerant from the cylinder 10.

[0063] Optionally, the cylinder 10 is made of metal and is generally cylindrical. For example, the cylinder 10 can be made of stainless steel or carbon steel. In particular, when using carbon steel, an anti-rust coating is applied to the outer surface of the cylinder 10 to prevent rusting. The cylinder 10 has a separation chamber 115 inside, and one end of the cylinder 10 along its axial direction has an installation channel 131 communicating with the separation chamber 115. A portion of the outlet pipe 30 is disposed within the installation channel 131. The outlet pipe 30 includes a first outlet pipe 31 and a second outlet pipe 33, both of which can be selected as pipes with a circular cross-section. The first outlet pipe 31 is connected to the cylinder 10 and is at least partially located inside the cylinder 10. One end of the first outlet pipe 31 and one end of the second outlet pipe 33 are connected and communicate within the installation channel 131. A portion of the second outlet pipe 33 is located outside the cylinder 10 for communication with external pipelines. In this embodiment, the materials of the first outlet pipe 31 and the second outlet pipe 33 are different. For example, the first outlet pipe 31 is a steel pipe, specifically a stainless steel pipe or a carbon steel pipe, and the second outlet pipe 33 is a copper pipe, such as a copper pipe, so as to facilitate connection with an external pipe that is also made of copper.

[0064] In other words, in this embodiment, the outlet pipe 30 is configured as two parts: a first outlet pipe 31 and a second outlet pipe 33. The first outlet pipe 31 and the second outlet pipe 33 are connected. The first outlet pipe 31 is located inside and connected to the cylinder 10, while the second outlet pipe 33 is located outside the cylinder 10 and connected to the first outlet pipe 31. The second outlet pipe 33 is used to connect to the external piping of the HVAC equipment, and therefore uses a suitable material, such as copper. The first outlet pipe 31 does not need to be directly connected to external pipes, so it can be made of a different material, such as steel, while still fulfilling the function of the outlet pipe 30. It is understandable that, compared to related technologies where the outlet pipe 30 is a single piece of pipe and entirely made of copper, the technical solution of this embodiment allows for different materials for the first outlet pipe 31 and the second outlet pipe 33, which helps to reduce costs.

[0065] In addition, the first outlet pipe 31 and the second outlet pipe 33 are connected in the installation channel 131, which not only facilitates installation, but also reduces or avoids refrigerant leakage and improves the safety and reliability of the oil separator 100.

[0066] Please refer to the reference. Figure 3In one embodiment, one end of the first outlet pipe 31 and one end of the second outlet pipe 33 are sleeved within the mounting channel 131. In the illustrated embodiment, the upper end of the first outlet pipe 31 along its own axial direction is sleeved with the lower end of the second outlet pipe 33 along its own axial direction. This makes it easier to align and connect the first outlet pipe 31 and the second outlet pipe 33. In addition, the sleeved structure at the connection between the first outlet pipe 31 and the second outlet pipe 33 can also prevent refrigerant leakage, improve the tightness of the connection between the first outlet pipe 31 and the second outlet pipe 33, and improve the sealing effect of the outlet pipe 30.

[0067] The first outlet tube 31 is welded to the cylinder 10 to ensure stable fixation within the mounting channel 131, resulting in a high connection reliability. Specifically, at least one of the outer wall of the first outlet tube 31 and the inner wall of the mounting channel 131 has a protrusion to define a welding gap 311 between them. For example, if the outer wall of the first outlet tube 31 has a protrusion, during assembly, after inserting the first outlet tube 31 into the mounting channel 131, the protrusion abuts against the inner wall of the mounting channel 131, facilitating pre-positioning before welding. Except for the portion of the outer wall surface of the first outlet tube 31 that abuts against the inner wall of the mounting channel 131, the remaining outer wall surface defines a welding gap 311 between the first outlet tube 31 and the inner wall of the mounting channel 131 for filling with solder. Optionally, the protrusion is an elongated strip extending approximately axially along the first outlet tube 31 to extend the width of the welding gap 311 in the axial direction of the first outlet tube 31, thereby increasing the welding strength. The protrusions are multiple and spaced apart circumferentially along the first outlet tube 31 to ensure more uniform solder distribution. Of course, the shape of the protrusions is not limited in this embodiment; in other embodiments, the protrusions may be spherical or similar, and may also be located on the inner wall of the mounting channel 131. It is understood that placing the protrusions on the first outlet tube 31 is easier to process and improves production efficiency compared to placing them on the inner wall of the mounting channel 131.

[0068] The portion where the first outlet pipe 31 and the second outlet pipe 33 interlock is also connected by welding. In this way, welding makes the connection between the first outlet pipe 31 and the second outlet pipe 33 more secure, provides better sealing, and prevents refrigerant leakage.

[0069] Furthermore, the end of the first outlet pipe 31 is fitted over the end of the second outlet pipe 33. For example... Figure 3As shown, the first outlet pipe 31 has a flared section at its upper end along its axial direction. The inner diameter of the flared section is larger than the inner diameter of the rest of the first outlet pipe 31. The flared section is fitted over the lower end of the second outlet pipe 33 along its axial direction. In this way, the inner diameter of the second outlet pipe 33 can be the same as the inner diameter of the first outlet pipe 31 excluding the flared section. This ensures the consistency of the inner diameter of the parts of the first and second outlet pipes 31 and 33 used for refrigerant flow, thereby ensuring smooth refrigerant flow and improving the sealing of the outlet pipe 30 to prevent refrigerant leakage. During assembly, the first outlet pipe 31 and the second outlet pipe 33 can be fitted together before being inserted into the installation channel 131, reducing the need for docking operations. During welding, the solder enters the welding gap 311 from the opening at the end of the installation channel 131 away from the separation chamber 115. Since the end of the first outlet tube 31 is sleeved outside the end of the second outlet tube 33, the gap between the end of the first outlet tube 31 and the end of the second outlet tube 33 can also be exposed upwards. The solder can fill the welding gap 311 and the gap between the end of the first outlet tube 31 and the end of the second outlet tube 33 in one go, thereby completing the welding of the first outlet tube 31 to the cylinder 10 and the welding of the first outlet tube 31 and the second outlet tube 33 in one go, reducing repeated operations and improving welding efficiency and production efficiency.

[0070] In one embodiment, the projections of the second outlet pipe 33 onto the inner wall of the mounting channel 131 and the first outlet pipe 31 onto the inner wall of the mounting channel 131 overlap. The width of the overlapping portion along the axial direction of the mounting channel 131 is h, satisfying the relationship 2mm ≤ h ≤ 15mm. Understandably, if h < 2mm, the welding length of the first outlet pipe 31 and the second outlet pipe 33 is insufficient, affecting the connection stability of the first outlet pipe 31 and the second outlet pipe 33; if h > 15mm, the solder cannot completely cover the gap between the first outlet pipe 31 and the second outlet pipe 33, affecting the welding effect. Therefore, to ensure welding effect and connection stability, this embodiment limits 2mm ≤ h ≤ 15mm. Optionally, h can be 7mm, 9mm, 12mm, 15mm, etc.

[0071] Combination Figure 2 and Figure 4In one embodiment, the side wall of the cylinder 10 is provided with an air inlet 117 that communicates with the separation chamber 115. The air inlet pipe 50 passes through the air inlet 117 so that the internal flow channel of the air inlet pipe 50 communicates with the separation chamber 115. In the height direction (axial direction of the cylinder 10) of the oil separator 100, the end of the first outlet pipe 31 away from the second outlet pipe 33 is located below the air inlet 117 to prevent the refrigerant flowing into the cylinder 10 from the air inlet pipe 50 from flowing directly into the first outlet pipe 31. Further, the height difference between the end of the first outlet pipe 31 away from the second outlet pipe 33 and the central axis of the air inlet 117 is H1, and the height difference between the end of the first outlet pipe 31 away from the second outlet pipe 33 and the bottom of the separation chamber 115 is H2, satisfying the relationship 0.1≤H1 / H2≤0.6. Understandably, if H1 / H2 is greater than 0.6, it indicates that the distance between the end of the first outlet pipe 31 furthest from the second outlet pipe 33 and the central axis of the inlet 117 is too great, and the end of the first outlet pipe 31 furthest from the second outlet pipe 33 is closer to the bottom of the separation chamber 115, which may cause oil backflow or blockage of the first outlet pipe 31, making it difficult for refrigerant to flow. If H1 / H2 is less than 0.1, it may cause the refrigerant flowing from the inlet pipe 50 into the cylinder 10 to flow directly into the first outlet pipe 31, resulting in poor oil separation. Therefore, to ensure high oil separation efficiency, this application embodiment limits 0.1 ≤ H1 / H2 ≤ 0.6, and H1 / H2 can be selected as 0.3, 0.4, 0.6, etc.

[0072] In one embodiment, the central axis of the air inlet 117 is spaced apart from the central axis of the cylinder 10, and the air inlet pipe 50 passes through the air inlet 117 along the central axis of the air inlet 117. In this way, the mixed fluid (a mixture of refrigerant and oil) flowing into the separation chamber 115 from the air inlet 117 impacts the inner wall of the separation chamber 115 and forms a spiral under the guidance of the inner wall of the separation chamber 115, which facilitates the separation of oil droplets in the mixed fluid.

[0073] Furthermore, combined Figure 4 The intake pipe 50 is located on one side of the first outlet pipe 31, specifically in Figure 4 From the perspective of the image, the inlet pipe 50 is located below the first outlet pipe 31, and the opening of one end of the inlet pipe 50 inside the separation chamber 115 is inclined toward the first outlet pipe 31. Understandably, the inclined opening of the inlet pipe 50 inside the separation chamber 115 reduces the amount of material near the first outlet pipe 31, thus avoiding interference between the inlet pipe 50 and the first outlet pipe 31. Furthermore, the inclined opening also guides the mixed fluid entering the separation chamber 115 toward the inner wall of the separation chamber 115, causing it to flow spirally along the inner wall, thereby improving oil separation efficiency.

[0074] In one embodiment, the inner diameter of the air inlet pipe 50 is d1, and the cylinder 10 includes a main body 11 defining the separation chamber 115. The main body 11 specifically includes a structural portion of the cylinder 10 with an air inlet 117; its specific structural range will be described in subsequent embodiments. In this embodiment, the inner diameter of the main body 11 is d2, satisfying the relationship 1.5 ≤ d2 / d1 ≤ 4, to ensure the fluid flow velocity along the inner wall of the separation chamber 115 and improve oil separation efficiency.

[0075] As the fluid rotates along the inner wall of the separation chamber 115, the separated oil deposits at the bottom of the separation chamber 115. Please refer to... Figure 2 and Figure 5 To prevent oil accumulation, in some embodiments, the cylinder 10 is further provided with an oil guide channel 151 communicating with the separation chamber 115. The oil guide channel 151 is located at the bottom of the cylinder 10 along the height direction of the oil separator 100, and is used to discharge the oil at the bottom of the separation chamber 115 through the oil guide channel 151. The oil separator 100 in this embodiment also includes a filter screen assembly 90, which is located inside the oil guide channel 151. The filter screen assembly 90 can filter foreign objects, preventing foreign objects from flowing into other subsequent pipelines and causing blockage, thus ensuring the smooth flow of the flow path.

[0076] In one specific embodiment, the filter assembly 90 includes a base 91 and a filter 93. The base 91 is fixed within the oil channel 151 to form the connection base for the filter 93, and defines an oil passage. The filter 93 is connected to the base 91 and covers the oil passage. Optionally, the base 91 is annular, with the oil passage defined in the middle portion of the base 91 to facilitate oil flow. The filter 93 and the base 91 can be welded together. The filter 93 arches towards the separation chamber 115 relative to the base 91, thereby increasing the effective contact area between the filter 93 and the oil, improving the filtration effect of the filter assembly 90 on foreign matter, and effectively preventing pipeline blockage.

[0077] Combination Figure 2 and Figure 5 In one embodiment, one end of the oil guide pipe 70 is installed inside the oil guide channel 151 to guide the oil in the oil guide channel 151 to an external pipeline. For example, the other end of the oil guide pipe 70 can be connected to a compressor to recover and reuse the separated oil, ensuring smooth operation of the compressor while improving oil utilization efficiency and avoiding waste. Optionally, the end of the oil guide pipe 70 located inside the oil guide channel 151 is welded to the inner wall of the oil guide channel 151, ensuring high connection reliability and good sealing.

[0078] In this embodiment, the oil guide channel 151 is provided with a first limiting surface 153. The base 91 is sandwiched between the end of the oil guide tube 70 located in the oil guide channel 151 and the first limiting surface 153. Thus, during the assembly process, after the base 91 is placed into the installation channel 131, the oil guide tube 70 can be connected to fix the base 91 through the end of the oil guide tube 70 and the first limiting surface 153. The assembly is convenient, fast and efficient.

[0079] Combination Figures 5 to 7 In one embodiment, the substrate 91 includes a filter screen 93 fixing part surrounding the oil inlet. The end face of the filter screen 93 fixing part facing the first limiting surface 153 is constructed as a second limiting surface 911, and the second limiting surface 911 abuts against the first limiting surface 153. In this embodiment, the connection between the substrate 91 and the filter screen 93 is constructed as the second limiting surface 911. While ensuring the filtration function, no excessive design is required for the substrate 91, resulting in a simple structure and reduced costs.

[0080] Combination Figure 5 , Figure 6 as well as Figure 8 In another embodiment, along the axial direction of the oil guide channel 151, the middle part of the substrate 91 is provided with a second limiting surface 911 facing the first limiting surface 153, and the second limiting surface 911 abuts against the first limiting surface 153. This allows the filter screen 93 to extend into the separation chamber 115 as much as possible, increasing the contact area between the filter screen 93 and the oil, and improving the filtration effect.

[0081] Combination Figure 1 and Figure 2 In some embodiments, the cylinder 10 includes a main body 11, a first reduced-diameter section 13, and a second reduced-diameter section 15. The first reduced-diameter section 13 and the second reduced-diameter section 15 are located at opposite ends of the main body 11 along its axial direction. The inner diameter of the first reduced-diameter section 13 is smaller than the inner diameter of the main body 11, and the inner diameter of the second reduced-diameter section 15 is smaller than the inner diameter of the main body 11. The main body 11 defines a separation chamber 115, the first reduced-diameter section 13 defines the aforementioned installation channel 131, and the second reduced-diameter section 15 defines the aforementioned oil guiding channel 151. This ensures that the main body 11 has sufficient dimensions for refrigerant flow and facilitates the connection and assembly of the cylinder 10 with the oil guiding pipe 70 and the outlet pipe 30.

[0082] Optionally, the main body 11 includes a first transition section 111, which connects to the first reduced-diameter section 13, and the inner diameter of the first transition section 111 gradually decreases along the direction close to the first reduced-diameter section 13. This allows for a smooth transition between the main body 11 and the first reduced-diameter section 13, facilitating machining. The main body 11 may also include a second transition section 113, which connects to the second reduced-diameter section 15, and the inner diameter of the second transition section 113 gradually decreases along the direction close to the second reduced-diameter section 15. This not only facilitates machining of the main body 10, but the second transition section 113 also collects oil and guides it to the oil guide channel 151, improving oil discharge efficiency. The main body 11 may be provided with either the first transition section 111 or the second transition section 113 alone, or the main body 11 may be provided with both the first transition section 111 and the second transition section 113 simultaneously, to ensure a smooth transition between the main body 11 and the first reduced-diameter section 13 and the second reduced-diameter section 15, and to improve oil discharge efficiency.

[0083] In this embodiment, the outer diameter d3 of the cylinder body 11 satisfies the condition 30mmn≤d3≤60mm. Understandably, if the outer diameter d3 is greater than 60mm, the fluid entering the cylinder body 11 will experience a significant decrease in flow velocity along the inner wall of the cylinder body 11, which is detrimental to oil droplet separation. Conversely, if the outer diameter d3 is less than 30mm, the oil droplet separation efficiency will be poor. This application embodiment limits the outer diameter d3 to satisfy the condition 30mmn≤d3≤60mm to achieve miniaturization of the cylinder body 10 and ensure oil separation efficiency. The outer diameter d3 can be selected as 40mm, 50mm, or 60mm.

[0084] Furthermore, the cylinder 10 is a single integral component, that is, the main body 11, the first reduced diameter section 13, and the second reduced diameter section 15 are integrally formed, which has good integrity and sealing performance, and is easy to manufacture and process. Of course, the main body 11, the first reduced diameter section 13, and the second reduced diameter section 15 can also be processed and formed separately and then welded to form the cylinder 10, and this application embodiment does not limit this.

[0085] The above is an explanation of the oil separator 100 of this application. Since the HVAC equipment of this application adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be repeated here.

[0086] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0087] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An oil separator, characterized in that, include: The cylindrical body has a separation cavity and an installation channel communicating with the separation cavity; and The outlet tube includes a first outlet tube and a second outlet tube formed separately. The first outlet tube is connected to the cylinder and is at least partially located inside the cylinder. One end of the first outlet tube and one end of the second outlet tube are connected and communicate with each other in the installation channel. A portion of the second outlet tube is located outside the cylinder. The material of the first outlet tube is different from that of the second outlet tube.

2. The oil separator as described in claim 1, characterized in that, One end of the first outlet pipe and one end of the second outlet pipe are connected within the installation channel.

3. The oil separator as described in claim 2, characterized in that, The portions of the first outlet pipe and the second outlet pipe that are connected to each other are welded together.

4. The oil separator as described in claim 3, characterized in that, The end of the first outlet tube is sleeved outside the end of the second outlet tube; and / or, The projection of the second outlet pipe onto the inner wall of the installation channel and the projection of the first outlet pipe onto the inner wall of the installation channel have an overlapping portion. The width of the overlapping portion in the axial direction of the installation channel is h, which satisfies the relationship 2mm≤h≤15mm.

5. The oil separator as described in claim 4, characterized in that, The first outlet pipe is welded to the cylinder body; At least one of the outer wall of the first outlet tube and the inner wall of the mounting channel is provided with a protrusion to define a welding gap between the outer wall of the first outlet tube and the inner wall of the mounting channel.

6. The oil separator according to any one of claims 1 to 5, characterized in that, The side wall of the cylinder is provided with an air inlet that communicates with the separation chamber. In the height direction of the oil separator, the end of the first outlet pipe that is away from the second outlet pipe is located below the air inlet. The height difference between the end of the first outlet pipe furthest from the second outlet pipe and the central axis of the air inlet is H1, and the height difference between the end of the first outlet pipe furthest from the second outlet pipe and the bottom of the separation chamber is H2, satisfying the relationship 0.1≤H1 / H2≤0.

6.

7. The oil separator according to any one of claims 1 to 5, characterized in that, The side wall of the cylinder is provided with an air inlet that communicates with the separation chamber, and the central axis of the air inlet is spaced apart from the central axis of the cylinder.

8. The oil separator as described in claim 7, characterized in that, It also includes an air intake pipe, which passes through the air inlet, with the opening at one end of the air intake pipe located within the separation chamber inclined toward the first outlet pipe; and / or, The inner diameter of the air intake pipe is d1, and the cylinder includes a main body defining the separation chamber. The inner diameter of the main body is d2, satisfying the relationship 1.5≤d2 / d1≤4.

9. The oil separator according to any one of claims 1 to 5, characterized in that, The cylinder is also provided with an oil guide channel that connects to the separation chamber, and the oil guide channel is located at the bottom of the cylinder along the height direction of the oil separator; The oil separator also includes a filter assembly located within the oil guide channel.

10. The oil separator as described in claim 9, characterized in that, The filter assembly includes: The substrate is fixed within the oil guide channel and defines the oil outlet; and A filter screen is connected to the substrate and covers the oil outlet. The filter screen is arched into the separation chamber relative to the substrate.

11. The oil separator as claimed in claim 10, characterized in that, It also includes an oil guide tube, one end of which is installed in the oil guide channel. The oil guide channel has a first limiting surface, and the substrate is sandwiched between the end of the oil guide tube and the first limiting surface.

12. The oil separator as claimed in claim 11, characterized in that, The substrate includes a filter screen fixing part surrounding the oil inlet, the end face of the filter screen fixing part facing the first limiting surface being constructed as a second limiting surface, the second limiting surface abutting against the first limiting surface; or... Along the axial direction of the oil guide channel, the middle part of the substrate is provided with a second limiting surface facing the first limiting surface, and the second limiting surface abuts against the first limiting surface.

13. The oil separator as described in claim 11, characterized in that, The oil guide pipe is welded to the inner wall of the oil guide channel.

14. The oil separator as described in claim 9, characterized in that, The cylindrical body includes: The cylindrical body defines the separation cavity; A first reduced-diameter section connects to one end of the cylindrical body and defines the mounting channel; the inner diameter of the first reduced-diameter section is smaller than the inner diameter of the cylindrical body. The second reduced diameter section connects to the end of the cylinder body away from the first reduced diameter section and defines the oil guide channel. The inner diameter of the second reduced diameter section is smaller than the inner diameter of the cylinder body.

15. The oil separator as described in claim 14, characterized in that, The cylindrical body includes a first transition section, which connects to the first diameter-reducing section, and the inner diameter of the first transition section gradually decreases along the direction close to the first diameter-reducing section; and / or, The cylinder body includes a second transition section, which connects to the second reduced diameter section, and the inner diameter of the second transition section gradually decreases along the direction close to the second reduced diameter section.

16. The oil separator as described in claim 14, characterized in that, The cylindrical body is a single integral component; and / or, The outer diameter d3 of the main body of the cylinder satisfies the condition 30mmn≤d3≤60mm.

17. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, include: compressor; Condenser; as well as The oil separator according to any one of claims 1 to 16, wherein the second outlet pipe is connected to the condenser, and the oil separator further includes an inlet pipe connected to the outlet end of the compressor.

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