Oil separator and heating and ventilation equipment

Abstract

The invention belongs to the technical field of oil separation, particularly relates to an oil separator and heating and ventilation equipment, and aims at solving the technical problem that an existing oil separator is poor in separation effect. The oil separator comprises a main cylinder body, wherein a cylinder cavity, a main air inlet, an air outlet and a main oil discharge outlet are formed in the main cylinder body, and the main air inlet, the air outlet and the main oil discharge outlet are communicated with the cylinder cavity; the separation assembly is arranged in the barrel cavity, a rotational flow channel is defined by the separation assembly and the main barrel, and the main air inlet communicates with the rotational flow channel so as to allow external airflow to enter the rotational flow channel; the conical barrel is arranged on the side, close to the main oil discharge outlet, of the separation assembly, the conical barrel comprises an air inlet and an oil discharge outlet which are formed in the axial direction of the conical barrel in a spaced mode, the diameter of the air inlet is larger than that of the oil discharge outlet, the oil discharge outlet is communicated with the main oil discharge outlet, and the air inlet is communicated with the rotational flow channel. According to the oil separator, the cyclone channel and the conical barrel are included, two-stage oil-gas separation can be achieved, and therefore the oil-gas separation effect of the oil separator is good.

Description

[0001] Priority information

[0002] This application claims priority to Chinese patent application 202311606257.7, filed on November 24, 2023, entitled “Oil Separator and HVAC Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of oil separation, and specifically relates to an oil separator and HVAC equipment. Background Art

[0004] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0005] The wall of the oil separator is a circular tube. When the inlet is set at a certain distance away from the center of the tube, due to the eccentric structure, the airflow with oil mist will swirl when entering from the inlet. This structure is simple, but the separation effect is not good. Summary of the invention

[0006] The purpose of the present invention is to at least solve the technical problem that the existing oil separator has poor separation effect. This purpose is achieved by the following methods:

[0007] The first aspect of the present invention provides an oil separator, comprising:

[0008] A main cylinder body, wherein the main cylinder body is formed with a cylinder cavity and a total air inlet, an air outlet and a total oil discharge port which are all connected with the cylinder cavity;

[0009] A partition assembly is disposed in the cylinder cavity and enclosed with the main cylinder body to form a swirl channel, and the main air inlet is connected to the swirl channel to allow external airflow to enter the swirl channel;

[0010] At least one conical cylinder is arranged on one side of the partition assembly close to the total oil discharge port, the conical cylinder includes an air inlet and an oil discharge port spaced apart along its axial direction, the diameter of the air inlet is larger than the diameter of the oil discharge port, the oil discharge port is connected with the total oil discharge port, and the air inlet is connected with the swirl channel.

[0011] According to the oil separator of the present invention, after the airflow enters from the main air inlet, it first enters the swirl channel for the first oil-gas separation, and then enters the conical cylinder through the inlet of the conical cylinder for the second oil-gas separation. The secondary oil-gas separation makes the oil-gas separation effect of the present invention better. Furthermore, the airflow enters from the larger diameter air inlet of the conical cylinder and then flows out from the smaller diameter oil outlet, which will cause the airflow to directly hit the inner wall of the conical cylinder, the airflow is fully in contact with the inner wall of the conical cylinder, and the oil droplets in the airflow will adhere to the inner wall of the conical cylinder, and the oil-gas separation effect of the conical cylinder is better.

[0012] In addition, the oil separator according to the present invention may further have the following additional technical features:

[0013] In some embodiments of the present invention, the swirl channel includes a first swirl channel and a second swirl channel, the separating assembly includes at least one swirl cylinder, the swirl cylinder is disposed in the cylinder cavity and spaced from the inner peripheral surface of the main cylinder body, a first swirl channel is formed between the outer peripheral surface of the swirl cylinder and the inner peripheral surface of the main cylinder body, a second swirl channel is formed in the swirl cylinder, the total air inlet is communicated with the first swirl channel to allow external air flow to enter the first swirl channel, and the first swirl channel is communicated with the second swirl channel.

[0014] In some embodiments of the present invention, the radial cross-section of the swirl cylinder is spiral.

[0015] In some embodiments of the present invention, the swirl direction of the first swirl channel is the same as that of the second swirl channel.

[0016] In some embodiments of the present invention, the separating assembly includes a first separating plate and a second separating plate, the first separating plate and the second separating plate are disposed in the cylinder cavity and spaced along the axial direction of the cylinder cavity, the first separating plate, the second separating plate and the cylinder cavity enclose to form the first swirl channel, and the first separating plate closes the first opening of the swirl cylinder and encloses with the swirl cylinder to form the second swirl channel.

[0017] In some embodiments of the present invention, the swirl cylinder is formed with a second opening, the first opening and the second opening are oppositely arranged along the axial direction of the swirl cylinder, the first separating plate is covered on the upper side of the first opening of the swirl cylinder, the second separating plate is disposed on the lower side of the second opening of the swirl cylinder, the second separating plate is formed with at least one through hole, the through holes correspond to the swirl cylinders one by one, and the through holes are docked with the second opening of the swirl cylinder.

[0018] In some embodiments of the present invention, the swirl cylinder includes a side opening, the side opening is disposed on the outer peripheral surface of the swirl cylinder, and the side opening communicates the first swirl channel with the second swirl channel.

[0019] In some embodiments of the present invention, an oil return hole is formed on the outer peripheral surface of the second separating plate.

[0020] In some embodiments of the present invention, an oil return hole is formed in the plate surface of the second separating plate, and the oil return hole is disposed outside the side opening of the swirl cylinder and communicated with the side opening.

[0021] In some embodiments of the present invention, the oil separator further includes at least one gas return cylinder, the gas return cylinder is communicated with the air outlet, the gas return cylinders are arranged corresponding to the swirl cylinders one by one and the gas return cylinder is disposed in the swirl cylinder, and the lower end of the gas return cylinder is lower than the upper surface of the second separating plate.

[0022] In some embodiments of the present invention, the first partition plate and the air return cylinder are of an integral structure.

[0023] In some embodiments of the present invention, the diameter of the oil discharge port of the conical cylinder is smaller than the diameter of the air return cylinder.

[0024] In some embodiments of the present invention, the first partition plate is formed with at least one air return hole, the air return holes correspond to the air return cylinders one by one, and the air return holes are sealingly connected to the outer peripheral surface of the air return cylinders.

[0025] In some embodiments of the present invention, the oil separator further includes at least one guide cylinder, and each guide cylinder is disposed between a cyclone cylinder and a conical cylinder and is communicated with the cyclone cylinder and the conical cylinder.

[0026] In some embodiments of the present invention, the cyclone cylinder, the guide cylinder, the conical cylinder and the second partition plate are of an integral structure.

[0027] The second aspect of the present invention provides a heating, ventilation and air conditioning (HVAC) device, which includes the oil separator according to the first aspect of the present invention.

[0028] The HVAC device provided by the second aspect of the present invention includes the oil separator according to the first aspect of the present invention, and thus also has the beneficial effects of the oil separator.

[0029] The above description is only an overview of the technical solutions of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically exemplified below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. Among them:

[0031] Figure 1 Schematically shows a front view of an oil separator provided according to some embodiments of the first aspect of the present invention.

[0032] Figure 2 For Figure 1 The A-A cross-sectional view of the oil separator shown in

[0033] Figure 3 Schematically shows a front view of the main cylinder provided according to some embodiments of the first aspect of the present invention.

[0034] Figure 4Schematically shows a front view of a separation component provided according to some embodiments of the first aspect of the present invention.

[0035] Figure 5 For Figure 4 The B-B cross-sectional view of the separation cone shown in

[0036] Figure 6 Schematically shows a perspective view of a separation component provided according to some embodiments of the first aspect of the present invention.

[0037] Figure 7 Schematically shows a perspective view of a separation component provided according to some embodiments of the first aspect of the present invention (with Figure 6 a different placement angle from the separation component in

[0038] Figure 8 Schematically shows a front view of a cyclone tube, a second partition plate, a flow guide tube, and a conical tube provided according to some embodiments of the first aspect of the present invention.

[0039] Figure 9 Schematically shows a perspective view of a cyclone tube, a second partition plate, a flow guide tube, and a conical tube provided according to some embodiments of the first aspect of the present invention.

[0040] Figure 10 Schematically shows a perspective view of a cyclone tube, a second partition plate, a flow guide tube, and a conical tube provided according to some embodiments of the first aspect of the present invention (with Figure 9 a different placement angle).

[0041] Figure 11 Schematically shows a top view of a cyclone tube, a second partition plate, a flow guide tube, and a conical tube provided according to some embodiments of the first aspect of the present invention.

[0042] Figure 12 Schematically shows a front view of a first partition plate and a return air cylinder provided according to some embodiments of the first aspect of the present invention.

[0043] Figure 13 Schematically shows a perspective view of a first partition plate and a return air cylinder provided according to some embodiments of the first aspect of the present invention.

[0044] Figure 14 Schematically shows a perspective view of a first partition plate and a return air cylinder provided according to some embodiments of the first aspect of the present invention (with Figure 13 a different placement angle).

[0045] Figure 15 Schematically shows a front view of a cyclone tube, a second partition plate, a flow guide tube, and a conical tube provided according to some embodiments of the first aspect of the present invention.

[0046] Figure 16 is Figure 15 a C-C sectional view of the cyclone tube, the second partition plate, the draft tube and the conical tube shown in

[0047] Figure 17 A perspective view of the cyclone tube, the second partition plate, the draft tube and the conical tube provided according to some embodiments of the first aspect of the present invention is schematically shown.

[0048] Figure 18 A top view of the flow tube, the second partition plate, the draft tube and the conical tube provided according to some embodiments of the first aspect of the present invention is schematically shown.

[0049] Figure 19 The flow direction of the air flow in the separation assembly provided according to some embodiments of the first aspect of the present invention is schematically shown.

[0050] Figure 20 is schematically shown Figure 11 the flow direction of the air flow in

[0051] The reference numerals in the drawings are as follows:

[0052] 1, oil separator;

[0053] 10, main cylinder body; 11, cylinder cavity; 12, total air inlet; 13, air outlet; 14, total oil drain port; 15, cylindrical section; 16, first conical section; 17, second conical section; 18, first connecting pipe; 19, second connecting pipe; 100, swirl channel; 101, first swirl channel; 102, second swirl channel; 103, intake pipe; 104, gas transmission pipe; 105, oil transmission pipe; 106, partition assembly;

[0054] 20, cyclone tube; 21, first opening; 22, second opening; 23, side opening; 24, arc-shaped guiding part;

[0055] 30, first partition plate; 31, air return hole;

[0056] 40, second partition plate; 41, through hole; 42, arc-shaped plate; 43, oil return notch; 44, second oil return hole;

[0057] 50, air return cylinder;

[0058] 60, conical tube; 61, oil drain port;

[0059] 70, draft tube;

[0060] 80, fixing member; 81, corner hole; 82, center hole. Detailed embodiments

[0061] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be fully conveyed to those skilled in the art.

[0062] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0063] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms do not imply an order or sequence when used herein. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0064] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientations depicted in the figure. For example, if the device in the figure is flipped, an element described as "below" or "beneath" another element or feature will then be oriented as "above" or "over" the other element or feature. Thus, the example term "below" can include both upward and downward orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are accordingly interpreted.

[0065] Combined Figures 1 to 18 As shown, according to some embodiments of the first aspect of the present invention, an oil separator 1 is provided, including: a main cylinder body 10, a partition assembly 106, and at least one conical cylinder 60. The main cylinder body 10 is formed with a cylinder cavity 11, and a total air inlet 12, an air outlet 13, and a total oil drain port 14 that are all communicated with the cylinder cavity 11. The partition assembly 106 is disposed in the cylinder cavity 11 and encloses a swirling channel 100 with the main cylinder body 10, and the total air inlet 12 is communicated with the swirling channel 100 to allow external air flow to enter the swirling channel 100. The conical cylinder 60 is disposed on one side of the partition assembly 106 close to the total oil drain port 14. The conical cylinder 60 includes an air inlet and an oil drain port 61 that are spaced apart along its axial direction. The diameter of the air inlet is larger than the diameter of the oil drain port 61, and the oil drain port 61 is communicated with the total oil drain port 14, and the air inlet is communicated with the swirling channel 100.

[0066] In the oil separator 1 according to the present invention, after the air flow enters from the total air inlet 12, it first enters the swirling channel 100 for the first oil-gas separation, and then enters the conical cylinder 60 through the inlet of the conical cylinder 60 for the second oil-gas separation. The secondary oil-gas separation makes the oil-gas separation effect of the oil-gas separator of the present invention better. Further, the air flow enters from the air inlet with a larger diameter of the conical cylinder 60 and flows out from the oil drain port 61 with a smaller diameter, which will cause the air flow to directly strike on the inner wall of the conical cylinder 60. The air flow makes full contact with the inner wall of the conical cylinder 60, and the oil droplets in the air flow will adhere to the inner wall of the conical cylinder 60, and the oil-gas separation effect of the conical cylinder 60 is better.

[0067] Please refer to Figure 1 、 Figure 2 and Figure 3, the main cylinder body 10 includes a cylindrical section 15, a first conical section 16 and a second conical section 17 located at both axial ends of the cylindrical section 15, as well as a first connecting pipe 18 and a second connecting pipe 19. The cylindrical section 15, the first conical section 16, the second conical section 17, the first connecting pipe 18 and the second connecting pipe 19 enclose to form a cylindrical cavity 11 of the main cylinder body 10. In one embodiment, the main cylinder body 10 is an integral structure, and the main cylinder body 10 can be prepared by a spinning forming method. The main cylinder body 10 includes a total air inlet 12, and the total air inlet 12 is arranged on the outer peripheral surface of the cylindrical section 15 and communicates with the cylindrical cavity 11.

[0068] To more clearly explain the present invention, the axial direction of the main cylinder body 10 is defined as the up and down direction, and the side where the air outlet 13 is located is defined as the upper side, and the side where the total oil drain port 14 is located is defined as the lower side.

[0069] The cylindrical section 15 includes an upper opening and a lower opening arranged at intervals along its axial direction. The first conical section 16 includes a large-diameter opening and a small-diameter opening, wherein the large-diameter opening is butted against the upper opening of the cylindrical section 15. The butt joint includes the meaning of sealed connection, that is, the large-diameter opening of the first conical section 16 is sealed and connected to the upper opening of the cylindrical section 15 and communicates. The small-diameter opening is butted against the lower port of the first connecting pipe 18. The upper port of the first connecting pipe 18 is the air outlet 13. The second conical section 17 includes a large-diameter opening and a small-diameter opening, wherein the large-diameter opening is butted against the lower opening of the cylindrical section 15, and the small-diameter opening is butted against the upper port of the second connecting pipe 19. The lower port of the second connecting pipe 19 is the total oil drain port 14. The total air inlet 12, the total oil drain port 14 and the air outlet 13 are all communicated with the cylindrical cavity 11.

[0070] The functions of the first conical section 16 and the second conical section 17 are both to reduce the diameter, so that the diameter of the small-diameter opening of the first conical section 16 matches the diameter of the external gas transmission pipe 104 for easy connection with each other, and the diameter of the small-diameter opening of the second conical section 17 matches the diameter of the external oil transmission pipe 105 for easy connection with each other. The function of the first connecting pipe 18 is to be inserted into the external gas transmission pipe 104 to achieve communication, and the function of the second connecting pipe 19 is to be inserted into the external oil transmission pipe 105 to achieve communication.

[0071] A first partition plate 30, a return air cylinder 50, a swirl cylinder 20, a second partition plate 40, a guide cylinder 70 and a conical cylinder 60 are sequentially arranged in the cylindrical cavity 11 from top to bottom. The first partition plate 30, the return air cylinder 50, the swirl cylinder 20, the second partition plate 40, the guide cylinder 70 and the conical cylinder 60 constitute a separation assembly. Further, Figures 4 to 7 The separation assembly is shown. The separation assembly is a collection of internal components of the main cylinder body 10, and the function of the separation assembly is to define all oil and gas separation channels in the cylindrical cavity 11.

[0072] Please refer to Figure 2, in the separation component, the first partition plate 30, the air return cylinder 50, the cyclone cylinder 20 and the second partition plate 40 form a partition component 106, and the function of the partition component 106 is to define a first cyclone channel 101 and a second cyclone channel 102 in the cylinder cavity 11. The inner peripheral surface of the main cylinder body 10, the first partition plate 30, the second partition plate 40 and the outer peripheral surface of the cyclone cylinder 20 surround and form the first cyclone channel 101, and the first cyclone channel 101 is arranged between the outer peripheral surface of the cyclone cylinder 20 and the inner peripheral surface of the main cylinder body 10. The inner peripheral surfaces of the first partition plate 30 and the cyclone cylinder 20 surround and form the second cyclone channel 102.

[0073] Please refer to Figures 4 to 11 , the cyclone cylinder 20 is arranged in the cylinder cavity 11 of the main cylinder body 10 and is spaced from the inner wall of the cylinder cavity 11. The axial direction of the cyclone cylinder 20 is parallel to the axial direction of the main cylinder body 10. Specifically, the cyclone cylinder 20 is arranged in the cylindrical section 15. The axial dimension L1 of the cyclone cylinder 20 is smaller than the axial dimension L2 of the main cylinder body 10. The number of the cyclone cylinders 20 is at least one. For example, the number of the cyclone cylinders 20 can be 1, 2, 3, 5, 6, 7 or 8. In one embodiment, the number of the cyclone cylinders 20 is 4. The 4 cyclone cylinders 20 are arranged in a ring. It can be understood that when the number of the cyclone cylinders 20 is multiple, the multiple cyclone cylinders 20 can be arranged in a ring and are spaced from the inner peripheral surface of the cylinder cavity 11. The ring arrangement can make each cyclone cylinder 20 adjacent to the first cyclone channel 101, and can make each cyclone cylinder 20 communicate with the first cyclone channel 101. In the cylinder cavity 11, the multiple cyclone cylinders 20 are arranged adjacent to each other and are located in the middle area of the cylinder cavity 11. In this way, the space of the first cyclone channel 101 can be made as large as possible. The adjacent cyclone cylinders 20 can be arranged in a lap with each other or can be spaced.

[0074] The cyclone cylinder 20 includes a first opening 21 and a second opening 22 arranged oppositely along its axial direction. Specifically, the first opening 21 is located at the upper end and the second opening 22 is located at the lower end. The spiral cyclone cylinder 20 further includes a side opening 23 located between the first opening 21 and the second opening 22. The side opening 23 of each cyclone cylinder 20 faces the first cyclone channel 101, so that the air flow in the first cyclone channel 101 can flow into the cyclone cylinder 20 through the side opening 23. In one embodiment, the side opening 23 extends from the side of the first opening 21 to the side of the second opening 22 along the axial direction of the main cylinder body 10. In one embodiment, there is a certain distance between the upper end of the side opening 23 and the first opening 21, and there is a certain distance between the lower end of the side opening 23 and the second opening 22, and the side opening 23 does not communicate the first opening 21 and the second opening 22.

[0075] The shape of the cyclone tube 20 is not limited, and the radial cross-section of the cyclone tube 20 can be circular or polygonal. In one embodiment, the cyclone tube 20 is a volute tube, that is, the radial cross-section of the cyclone tube 20 is volute-shaped. In one embodiment, the cyclone tube 20 rotates counterclockwise from the inside out, that is, the inner wall of the cyclone tube 20 rotates counterclockwise to the outer wall, and the side opening 23 is the gap between the inner wall and the outer wall of the cyclone tube 20. Please refer to Figure 11 , the outermost wall of the volute-shaped cyclone tube 20 is defined as the arc-shaped guide portion 24. The arc-shaped guide portion 24 is tangentially arranged with the first cyclone channel 101. Therefore, the arc-shaped guide portion 24 has the function of guiding the air flow into the side opening 23, so that as much air flow as possible in the first cyclone channel 101 can flow into the cyclone tube 20. At the same time, the arc-shaped guide portion 24 increases the area of the inner peripheral surface of the cyclone tube 20, so that the air flow contacts the inner peripheral surface of the cyclone tube 20 with a larger area, and more oil droplets in the air flow adhere to the inner peripheral surface of the cyclone tube 20, so that the oil-gas separation effect of the cyclone tube 20 is better.

[0076] In one embodiment, the cyclone tube 20 is a cylinder with a side opening 23 formed on its outer peripheral surface, and the radial cross-section of the cyclone tube 20 is an arc. In one embodiment, the circular angle of the arc is greater than or equal to 270 degrees and less than or equal to 355 degrees. The notch of the arc extends along the axial direction of the main cylinder 10 to form the side opening 23. In another embodiment, the cyclone tube 20 is a square tube with a side opening 23 formed on its outer peripheral surface.

[0077] The oil separator 1 further includes an air inlet pipe 103 for delivering the oil-containing air flow into the cylinder cavity 11. The air inlet pipe 103 is tangentially arranged with the outer peripheral surface of the main cylinder 10. Please refer to Figure 19 and Figure 20 , after the air flow enters the first cyclone channel 101 from the air inlet pipe 103, it rotates in the first cyclone channel 101. By controlling the position of the air inlet pipe 103, the air flow can rotate clockwise or counterclockwise after entering the first cyclone channel 101. In one embodiment, the air flow rotates clockwise in the first cyclone channel 101. In order to facilitate the air flow to enter the cyclone tube 20, the side opening 23 of the volute tube is arranged facing the air flow. Specifically, the wall of the volute-shaped cyclone tube 20 is arranged to rotate counterclockwise from the inside to the outside. In this way, the cyclone direction of the first cyclone channel 101 is the same as that of the second cyclone channel 102, and the air flow in the first cyclone channel 101 will flow into the second cyclone channel 102 as much as possible.

[0078] In one embodiment, the air flow rotates counterclockwise within the first swirl channel 101, and the cylindrical wall of the spiral swirl cylinder 20 is arranged to rotate clockwise from the inside to the outside. The swirl direction of the first swirl channel 101 is the same as that of the second swirl channel 102. Similarly, the side opening 23 of the spiral swirl cylinder 20 can be arranged facing the air flow, so that as much air flow as possible flows into the swirl cylinder 20.

[0079] Please refer to Figures 4 to 18 , the oil separator 1 includes a first partition plate 30 and a second partition plate 40, and both the first partition plate 30 and the second partition plate 40 are arranged in the cylinder cavity 11. Along the axial direction of the cylinder cavity 11, the first partition plate 30 and the second partition plate 40 are arranged at intervals. Specifically, the first partition plate 30 is located at the upper end and the second partition plate 40 is located at the lower end. In one embodiment, both the first partition plate 30 and the second partition plate 40 are arranged in the cylindrical section 15 of the main cylinder body 10, and both the first partition plate 30 and the second partition plate 40 are circular plates. The first partition plate 30 covers the upper side of the first opening 21 of the swirl cylinder 20, and the second partition plate 40 is connected to the lower side of the second opening 22 of the swirl cylinder 20. Therefore, the first partition plate 30, the second partition plate 40, the inner peripheral surface of the main cylinder body 10 and the outer peripheral surface of the swirl cylinder 20 enclose and form the first swirl channel 101. The first partition plate 30 and the second partition plate 40 respectively close the upper opening and the lower opening of the first swirl channel 101, so that the air flow in the first swirl channel 101 can only flow into the second swirl channel 102. The first partition plate 30 also closes the first opening at the upper end of the swirl cylinder 20, so that the air flow in the swirl cylinder 20 can only swirl and then flow downward within the swirl cylinder 20.

[0080] At least one through hole 41 is formed on the second partition plate 40, and the number of through holes 41 is the same as the number of swirl cylinders 20, and the through holes 41 correspond to the swirl cylinders 20 one by one. The through holes 41 are docked with the second openings 22 of the swirl cylinders 20. In this way, through the through holes 41 on the second partition plate 40, the second openings 22 of the swirl cylinders 20 are not blocked, and the air flow in the swirl cylinders 20 can flow out through the second openings 22 after swirling within the swirl cylinders 20.

[0081] In one embodiment, the cyclone cylinder 20 is a spiral cylinder, and the second opening 22 of the cyclone cylinder 20 is a spiral hole, which includes a circular hole portion and an arc hole portion. The arc hole portion is arranged inside the arc-shaped guide portion 24. The arc hole portion is a quasi-triangular hole formed by two arc sides and a straight side. In one embodiment, the through hole 41 of the second partition plate 40 is circular, and it is only docked with the circular hole portion of the second opening 22 of the cyclone cylinder 20. The arc hole portion of the second opening 22 is closed by the second partition plate 40, and the part of the second partition plate 40 that closes the arc hole portion is defined as the arc plate 42. The arc plate 42 helps to guide the airflow into the interior of the cyclone cylinder 20 and plays a role in guiding the flow. The arc plate 42 also plays a role in fixing the cyclone cylinder 20 to the second partition plate 40. The lower end of the arc-shaped guide portion 24 of the cyclone cylinder 20 is connected to the second partition plate 40, which also plays a role in fixing the cyclone cylinder 20 to the second partition plate 40.

[0082] Please refer to Figures 15 to 18 , in one embodiment, an oil return hole is formed on the second partition plate 40. The oil return hole is directly communicated with the total oil discharge port 14 of the oil separator 1. Through the oil return hole, after the airflow in the first cyclone channel 101 undergoes oil-gas separation, the oil adhering to the inner wall of the first cyclone channel 101 can directly flow into the oil return hole, and then flow out through the oil return hole and then out through the total oil discharge port 14 of the oil separator 1. The oil return hole axially penetrates the second partition plate 40 along the axis of the main cylinder 10.

[0083] The oil return hole includes a first oil return hole and / or a second oil return hole 44. The first oil return hole is arranged on the outer peripheral surface of the second partition plate 40. At least one oil return notch 43 is formed on the outer peripheral surface of the second partition plate 40. The oil return notch 43 and the inner peripheral surface of the main cylinder 10 enclose to form the first oil return hole. In one embodiment, the second partition plate includes a plurality of oil return notches 43, and the plurality of oil return notches 43 are arranged at intervals along the outer peripheral surface of the second partition plate 40.

[0084] The second oil return hole 44 is arranged on the plate surface of the second partition plate 40, and the plate surface is perpendicular to the axis of the main cylinder 10. The second oil return hole 44 is arranged in the area of the second partition plate 40 corresponding to the outside of the side opening 23 of the cyclone cylinder 20, and the second oil return hole 44 is arranged opposite to the side opening 23, so that the second oil return hole 44 is communicated with the side opening 23. In this embodiment, the number of the second oil return holes 44 is 4, and the 4 second oil return holes 44 are respectively arranged in the areas outside the side openings 23 of the 4 cyclone cylinders 20. In one embodiment, a plurality of second oil return holes 44 can be formed in the area outside the side opening 23 of each cyclone cylinder 20.

[0085] Compared with the second oil return hole 44, the first oil return hole is arranged closer to the inner peripheral surface of the main cylinder body 10. Therefore, the oil liquid accumulated in the first swirl passage 101 is more likely to flow out from the first oil return hole. The second oil return hole 44 is arranged outside the side opening 23 of the swirl cylinder 20 and communicates with the side opening 23. Therefore, the oil liquid in both the first swirl passage 101 and the second swirl passage 102 can flow out from the second oil return hole 44.

[0086] Please refer to Figures 2 to 7 The oil separator 1 further includes at least one gas return cylinder 50. The gas return cylinder 50 has a straight cylinder structure with both upper and lower ends open. The axis of the gas return cylinder 50 is parallel to the axis of the main cylinder body 10. The gas return cylinder 50 communicates with the air outlet 13. The gas return cylinder 50 corresponds to the swirl cylinder 20 one by one and the gas return cylinder 50 is arranged inside the swirl cylinder 20. The number of gas return cylinders 50 is equal to the number of swirl cylinders 20. In one embodiment, the number of gas return cylinders 50 can be 1, 2, 3, 5, 6, 7 or 8. In this embodiment, both the gas return cylinder 50 and the swirl cylinder 20 are 4. The gas return cylinder 50 corresponds to the swirl cylinder 20 one by one, and one gas return cylinder 50 is arranged inside each swirl cylinder 20. Thus, the airflow swirling inside the swirl cylinder 20 can flow in from the lower end opening of the gas return cylinder 50 and flow out from the upper end opening of the gas return cylinder 50. The upper end opening of the gas return cylinder 50 communicates with the air outlet 13. It can be understood that when the gas return cylinder 50 is inserted into the swirl cylinder 20, the second swirl passage 102 inside the swirl cylinder 20 is improved from a cylindrical passage to an annular passage, which increases the area of the inner surface of the second swirl passage 102, and makes the airflow contact with both the inner surface of the swirl cylinder 20 and the outer surface of the gas return cylinder 50 during the swirling process in the second swirl passage 102. The airflow will adhere to both the inner surface of the swirl cylinder 20 and the outer surface of the gas return cylinder 50, and the oil separation effect of the second swirl passage 102 is further improved.

[0087] The lower end of the gas return cylinder 50 is lower than the upper surface of the second partition plate 40, which avoids the airflow inside the swirl cylinder 20 flowing directly into the lower end opening of the gas return cylinder 50 without swirling inside the swirl cylinder 20 and flowing out of the oil separator 1 from the air outlet 13, resulting in a poor oil separation effect of the swirl cylinder 20. In one embodiment, the distance between the lower end of the gas return cylinder 50 and the upper surface of the second partition plate 40 is greater than 3 mm, that is, the lower end of the gas return cylinder 50 is at least 3 mm lower than the upper surface of the second partition plate 40. In one embodiment, the lower end of the gas return cylinder 50 is 4 mm, 5 mm or 6 mm lower than the upper surface of the second partition plate 40. This can ensure that the airflow inside the swirl cylinder 20 rotates sufficiently in the second swirl passage 102 for oil-gas separation before flowing into the lower end opening of the gas return cylinder 50, so that the oil-gas separation effect of the second swirl passage 102 is better.

[0088] At least one air return hole 31 is formed on the first partition plate 30. The air return hole 31 communicates with the total air return hole 31 through the cylinder cavity 11. The number of the air return holes 31 is equal to the number of the air return cylinders 50. The air return holes 31 and the air return cylinders 50 are in one-to-one correspondence. Each air return cylinder 50 corresponds to one air return hole 31. The air return hole 31 is butt-connected to the upper end opening of the air return cylinder 50. In one embodiment, the air return hole 31 is hermetically connected to the outer peripheral surface of the air return cylinder 50, and the air return cylinder 50 can extend out of the air return hole 31 and extend to the upper end of the air return hole 31. In this way, the first partition plate 30 cannot close the upper end opening of the air return cylinder 50, so that the upper end opening of the air return cylinder 50 can communicate with the air outlet 13 of the oil separator 1, and the air flow in the air return cylinder 50 can flow out through its upper end opening and then flow out of the oil separator 1 through the air outlet 13. It can be understood that during the process of the air flow flowing out of the air return cylinder 50, the air flow will also contact the inner wall of the air return cylinder 50, and the oil droplets in the air flow will adhere to the inner wall of the air return cylinder 50. Therefore, the air return cylinder 50 also has the function of oil-gas separation. The oil droplets adhering to the inner wall of the air return cylinder 50 can drip from the inner wall of the air return cylinder 50, fall into the conical cylinder 60 below the air return cylinder 50, and flow out from the oil discharge port 61 of the conical cylinder 60 and then flow out from the total oil discharge port 14 of the total oil separator 1. In one embodiment, the first partition plate 30 and the air return cylinder 50 are of an integral structure. In this way, the first partition plate 30 and the air return cylinder 50 can be integrally processed by injection molding or casting, etc., saving the preparation process and reducing the cost.

[0089] Please refer to Figure 9 , the oil separator 1 further includes a fixing member 80. The fixing member 80 is connected to the outer peripheral surface of the swirl cylinder 20 and is disposed near the first opening 21 of the swirl cylinder 20. When there are at least two swirl cylinders 20, the fixing member 80 is disposed between at least two swirl cylinders 20, and the fixing member 80 is fixedly connected to the outer peripheral surface of each swirl cylinder 20. The plurality of swirl cylinders 20 can be fixedly connected through the fixing member 80. Fixing holes are formed on the upper surface of the fixing member 80, and fixing protrusions (not shown in the figure) are provided on the lower surface of the first partition plate 30. When the first partition plate 30 covers the upper side of the first opening 21 of the swirl cylinder 20, the fixing protrusions on the lower surface of the first partition plate 30 are inserted into the fixing holes, thereby positioning the first partition plate 30 and the swirl cylinder 20, which is convenient for installing the first partition plate 30 in place during the manufacturing process. It can be understood that the number of the fixing holes is at least one.

[0090] In one embodiment, the number of the fixing holes is five, which includes four corner holes 81 and one center hole 82. Correspondingly, the number of the fixing protrusions is also five, which includes four corner protrusions (not shown in the figure) and one center protrusion (not shown in the figure). The four corner protrusions are respectively inserted into the four corner holes 81, and the center protrusion is inserted into the center hole 82. In one embodiment, the fixing member 80 can also extend from the side of the first opening 21 to the side of the second opening 22.

[0091] Please refer to Figures 2 to 11 and Figures 15 to 18 , the oil separator 1 further includes at least one conical cylinder 60. The axis of the conical cylinder 60 is parallel to the axis of the main cylinder body 10. The conical cylinder 60 includes an air inlet and an oil drain port 61. The diameter of the air inlet is larger than the diameter of the oil drain port 61. The air inlet of the conical cylinder 60 communicates with the second opening 22 of the cyclone cylinder 20. The number of the conical cylinders 60 is equal to the number of the cyclone cylinders 20. The conical cylinders 60 and the cyclone cylinders 20 are in one-to-one correspondence. One conical cylinder 60 is connected below each cyclone cylinder 20. In one embodiment, the number of the conical cylinders 60 can be 1, 2, 3, 5, 6, 7 or 8. In this embodiment, there are 4 return air cylinders 50, cyclone cylinders 20 and conical cylinders 60 respectively. The air flow swirling down from the second opening 22 of the cyclone cylinder 20 will continue to swirl downward under its rotational tendency, which will prevent the air flow from rising under its own buoyancy and flowing into the lower end opening of the return air cylinder 50. By providing the conical cylinder 60, due to the taper of the conical cylinder 60, the air flow swirling down from the second opening 22 of the cyclone cylinder 20 will directly strike the inner wall of the conical cylinder 60, and the swirling tendency of the air flow will dissipate, so that the air flow will move upward under the action of its own buoyancy and flow into the lower end opening of the return air cylinder 50, and then flow out from the upper end opening of the return air cylinder 50.

[0092] The diameter of the oil drain port 61 of the conical cylinder 60 is smaller than the diameter of the return air cylinder 50. In this way, the air flow in the conical cylinder 60 is more likely to flow out from the return air cylinder 50, rather than directly flowing out from the oil drain port 61 under the swirling tendency of the air flow, which will deteriorate the oil-gas separation effect of the oil separator 1. When the air flow contacts the inner wall of the conical cylinder 60, it will also adhere to the inner wall of the conical cylinder 60, and the oil liquid accumulated on the inner wall of the conical cylinder 60 can directly flow out from the oil drain port 61 of the conical cylinder 60. By providing 4 conical cylinders 60, this increases the adhesion area of the air flow, and improves the oil-gas separation effect of the conical cylinder 60.

[0093] Please refer to Figures 2 to 11 and Figures 15 to 18, the oil separator 1 further includes at least one flow guide cylinder 70. The axis of the flow guide cylinder 70 is parallel to the axis of the main cylinder body 10. The flow guide cylinder 70 is a straight cylinder structure with both upper and lower ends open. Each flow guide cylinder 70 is arranged between a cyclone cylinder 20 and a conical cylinder 60 and is communicated with both the cyclone cylinder 20 and the conical cylinder 60. The upper opening of the flow guide cylinder 70 is butted against the second opening 22 of the cyclone cylinder 20, and the lower opening of the flow guide cylinder 70 is butted against the air inlet of the conical cylinder 60. The function of the flow guide cylinder 70 is to guide the air flow to flow from the second opening 22 of the cyclone cylinder 20 into the air inlet of the conical cylinder 60. The number of the flow guide cylinders 70 is the same as the number of the cyclone cylinders 20. The flow guide cylinders 70 and the cyclone cylinders 20 are in one-to-one correspondence. In one embodiment, the number of the flow guide cylinders 70 can be 1, 2, 3, 5, 6, 7 or 8. In this embodiment, the return air cylinder 50, the cyclone cylinder 20, the conical cylinder 60 and the flow guide cylinder 70 are all 4.

[0094] In one embodiment, the cyclone cylinder 20, the flow guide cylinder 70 and the conical cylinder 60 are of an integral structure. In one embodiment, the second partition plate 40, the cyclone cylinder 20, the flow guide cylinder 70, the fixing member 80 and the conical cylinder 60 are of an integral structure. Therefore, the second partition plate 40, the cyclone cylinder 20, the flow guide cylinder 70, the conical cylinder 60 and the fixing member 80 can be integrally processed by injection molding or casting, etc., saving the preparation process and reducing the cost.

[0095] In one embodiment, the return air cylinder 50 extends into the flow guide cylinder 70. Since the return air cylinder 50 is a circular straight cylinder, compared with the conical cylinder 60, the flow guide cylinder 70 is more convenient to cooperate with the return air cylinder 50, and the lower end of the return air cylinder 50 can also be lower. The return air cylinder 50 extending into the flow guide cylinder 70 can further prevent the air flow in the cyclone cylinder 20 from flowing out directly from the lower opening of the return air cylinder 50 without sufficient swirling in the cyclone cylinder 20. At the same time, the flow guide cylinder 70 also increases the adhesion area of the air flow, and the oil droplets in the air flow can adhere to the inner wall of the flow guide cylinder 70, and the flow guide cylinder 70 also plays an effect of oil-gas separation. By providing 4 flow guide cylinders 70, this increases the adhesion area of the air flow and improves the oil-gas separation effect of the flow guide cylinder 70.

[0096] Since the oil separator 1 is used to separate high-temperature oil-containing gas, the oil separator 1 of the present invention is made of high-temperature resistant materials. In one embodiment, the oil separator 1 can be made of metal. In one embodiment, the oil separator 1 can be made of plastic, specifically polyphenylene sulfide (PPS).

[0097] To fix the separation component within the cylinder cavity 11, an upper limit protrusion and a lower limit protrusion are provided on the inner circumferential surface of the main cylinder body 10, and the upper limit protrusion and the lower limit protrusion are arranged at intervals along the axial direction of the main cylinder body 10. Specifically, the upper limit protrusion is disposed on the upper side of the first partition plate 30, and the lower limit protrusion is disposed on the lower side of the second partition plate 40. The upper limit protrusion and the lower limit protrusion form a limit groove to fix the separation component within the cylinder cavity 11. The upper limit protrusion and the lower limit protrusion can be integrally formed with the main cylinder body through a spinning process. In one embodiment, both the upper limit protrusion and the lower limit protrusion are annular, so that they can be directly integrally formed with the main cylinder body through the spinning process.

[0098] According to some embodiments of the second aspect of the present invention, a heating, ventilation, and air conditioning (HVAC) device is provided. The HVAC device includes the oil separator 1 according to the first aspect of the present invention. The HVAC device includes, but is not limited to, air conditioners, multi-connected units, heat pumps, water heaters, pool machines, etc.

[0099] In one embodiment, the HVAC device is an air conditioner and includes an evaporator, a compressor, and a condenser. The oil separator 1 is connected to the compressor and is used to separate the oil liquid from the high-temperature oil-containing gas output by the compressor. The oil liquid is the lubricating oil required for the operation of the compressor. The HVAC device further includes an exhaust pipe that connects the compressor and the condenser. The oil separator 1 is disposed on the exhaust pipe. The HVAC device further includes an oil return pipe, and the oil return pipe includes a first end and a second end arranged opposite to each other. The first end of the oil return pipe is connected to the oil separator 1. The HVAC device further includes an intake pipe. The intake pipe connects the evaporator and the compressor in a pipeline. The second end of the oil return pipe is connected to the intake pipe.

[0100] According to the HVAC device of the second aspect of the present invention, the lubricating oil in the oil-containing gas output by the compressor is separated by the oil separator 1, which avoids the lubricating oil of the compressor itself from flowing into the condenser, causing the compressor to be in an oil-deficient state. When the compressor lacks lubricating oil, it will affect the working state of the compressor and accelerate the wear of the compressor life.

[0101] As described above, only the specific preferred embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An oil separator, characterized in that, comprising: a main cylinder body, the main cylinder body being formed with a cylinder cavity and a total air inlet, an air outlet and a total oil drain port all communicating with the cylinder cavity; a separating assembly, the separating assembly being disposed in the cylinder cavity and enclosing a swirling channel with the main cylinder body, the total air inlet communicating with the swirling channel to allow external air flow to enter the swirling channel; at least one conical cylinder, the conical cylinder being disposed on a side of the separating assembly close to the total oil drain port, the conical cylinder including an air inlet and an oil drain port spaced along its axial direction, the diameter of the air inlet being greater than that of the oil drain port, the oil drain port communicating with the total oil drain port, and the air inlet communicating with the swirling channel.

2. The oil separator according to claim 1, characterized in that, the swirling channel includes a first swirling channel and a second swirling channel, the separating assembly includes at least one swirling cylinder, the swirling cylinder being disposed in the cylinder cavity and spaced from the inner peripheral surface of the main cylinder body, a first swirling channel being formed between the outer peripheral surface of the swirling cylinder and the inner peripheral surface of the main cylinder body, a second swirling channel being formed inside the swirling cylinder, the total air inlet communicating with the first swirling channel to allow external air flow to enter the first swirling channel, and the first swirling channel communicating with the second swirling channel.

3. The oil separator according to claim 2, characterized in that, the radial cross-section of the swirling cylinder is spiral-shaped.

4. The oil separator according to claim 2, characterized in that, the swirling direction of the first swirling channel is the same as that of the second swirling channel.

5. The oil separator according to claim 2, characterized in that, the separating assembly includes a first separating plate and a second separating plate, the first separating plate and the second separating plate being disposed in the cylinder cavity and spaced along the axial direction of the cylinder cavity, the first separating plate, the second separating plate and the cylinder cavity enclosing to form the first swirling channel, and the first separating plate closing a first opening of the swirling cylinder and enclosing with the swirling cylinder to form the second swirling channel.

6. The oil separator according to claim 5, characterized in that, the swirling cylinder is formed with a second opening, the first opening and the second opening being oppositely disposed along the axial direction of the swirling cylinder, the first separating plate covering the upper side of the first opening of the swirling cylinder, the second separating plate being disposed under the second opening of the swirling cylinder, the second separating plate being formed with at least one through hole, the through hole corresponding to the swirling cylinder one by one, and the through hole being docked with the second opening of the swirling cylinder.

7. The oil separator according to claim 6, characterized in that, the swirling cylinder includes a side opening, the side opening being disposed on the outer peripheral surface of the swirling cylinder, and the side opening communicating the first swirling channel with the second swirling channel.

8. The oil separator according to claim 7, characterized in that, oil return holes are formed on the outer peripheral surface of the second separating plate.

9. The oil separator according to claim 7, characterized in that, An oil return hole is formed in the plate surface of the second partition plate. The oil return hole is arranged outside the side opening of the cyclone cylinder and communicated with the side opening.

10. The oil separator according to claim 7, characterized in that, the oil separator further comprises at least one gas return cylinder, the gas return cylinder is communicated with the air outlet, the gas return cylinder is arranged corresponding to the cyclone cylinder one by one and the gas return cylinder is arranged inside the cyclone cylinder, and the lower end of the gas return cylinder is lower than the upper surface of the second partition plate.

11. The oil separator according to claim 10, characterized in that, the first partition plate and the gas return cylinder are of an integral structure.

12. The oil separator according to claim 10, characterized in that, the diameter of the oil discharge port of the conical cylinder is smaller than the diameter of the gas return cylinder.

13. The oil separator according to claim 10, characterized in that, at least one gas return hole is formed in the first partition plate, the gas return holes are arranged corresponding to the gas return cylinders one by one, and the gas return holes are hermetically connected to the outer peripheral surface of the gas return cylinders.

14. The oil separator according to any one of claims 5-13, characterized in that, the oil separator further comprises at least one flow guiding cylinder, and each flow guiding cylinder is arranged between a cyclone cylinder and a conical cylinder and is communicated with the cyclone cylinder and the conical cylinder.

15. The oil separator according to claim 14, characterized in that, the cyclone cylinder, the flow guiding cylinder, the conical cylinder and the second partition plate are of an integral structure.

16. A heating, ventilation and air conditioning (HVAC) device, characterized in that, the HVAC device comprises the oil separator according to any one of claims 1-15.

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