Gas-liquid separator

Abstract

The invention provides a gas-liquid separator which comprises a shell and a U-shaped pipe, and at least part of the U-shaped pipe is located in the shell. An oil return hole is formed in the bottom of the U-shaped pipe, and a first cavity and a second cavity which are communicated with each other are formed in a cavity at the lower end of the shell; the gas-liquid separator further comprises a filtering component and a drying component, the filtering component is installed at the position of the oil return hole, the drying component is located in the first cavity, the filtering component is located in the second cavity, the gas-liquid separator further comprises a blocking net structure, and the blocking net structure is used for limiting the drying component. The gas-liquid separator can improve the stability of the drying part.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning system components, and in particular to a gas-liquid separator. Background Art

[0002] The function of the gas-liquid separator is to separate the gaseous and liquid refrigerants, so that the refrigerants enter the compressor from the compressor suction port in the form of gas, preventing liquid hammer on the compressor, and at the same time recovering the refrigeration oil into the compressor to ensure the normal operation of the compressor.

[0003] The gas-liquid separator is provided with a U-shaped tube. The liquid phase of the gas-liquid two-phase refrigerant entering the gas-liquid separator sinks, and the gas phase enters from one end of the U-shaped tube and exits the gas-liquid separator from the other end. The gas-liquid separator is also provided with a drying component, which is clamped on the U-shaped tube, but the drying component is easy to loosen. Summary of the invention

[0004] The purpose of the present application is to provide a gas-liquid separator that can improve the stability of a drying component.

[0005] The gas-liquid separator provided in the present application includes a shell and a U-shaped tube, at least part of the U-shaped tube is located in the shell; an oil return hole is opened at the bottom of the U-shaped tube, and the lower end cavity of the shell forms a first cavity and a second cavity that are interconnected; the gas-liquid separator also includes a filter component and a drying component, the filter component is installed at the position of the oil return hole, the drying component is located in the first cavity, and the filter component is located in the second cavity, and the gas-liquid separator also includes a retaining net structure, which is used to limit the drying component.

[0006] In the gas-liquid separator of this application, the drying component is arranged in the lower end cavity of the shell, and the lower end cavity of the shell is used as a container for holding the drying component, which is not easy to loosen, and is limited by a retaining net structure to further improve the stability of its installation; in addition, the filtering component and the drying component are both arranged in the lower end cavity and are arranged in different chambers, which, on the one hand, is conducive to the entry of the dried refrigerant oil and refrigerant into the filtering component, and on the other hand, the two can not interfere with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the structure of the gas-liquid separator in the first embodiment of the present application;

[0008] Figure 2 for Figure 1 Schematic diagram of the assembly of the middle and upper end cover and the inlet and outlet pipes;

[0009] Figure 3 for Figure 1 Schematic diagram of the structure of the middle U-shaped tube;

[0010] Figure 4 for Figure 3 The front view of the middle U-shaped tube;

[0011] Figure 5 for Figure 1 The structural diagram of the first retaining net in the middle;

[0012] Figure 6 for Figure 5 An axial cross-sectional view of the first baffle in the middle;

[0013] Figure 7 for Figure 1 An exploded view of the first baffle, drying components, second baffle and lower end cover;

[0014] Figure 8 for Figure 7 Schematic diagram of the second baffle in the middle;

[0015] Fig. 9 for Figure 1 A schematic diagram of the structure of the filter component;

[0016] Fig.10 for Figure 1 Schematic diagram of the structure of the middle air guide;

[0017] Fig.11 for Fig.10 A top view of the middle air guide;

[0018] Fig.12 This is a schematic structural diagram of a gas-liquid separator in the second embodiment of the present application;

[0019] Fig.13 for Fig.12 Schematic diagram of the assembly of the first baffle, drying components and lower end cover;

[0020] Fig.14 This is a schematic structural diagram of a gas-liquid separator in the third embodiment of the present application;

[0021] Fig.15 for Fig.14 Schematic diagram of the assembly of the middle U-shaped tube, the upper end cover and the fixing plate;

[0022] Fig.16 for Fig.14 Schematic diagram of the assembly of the middle third baffle and the lower end cover;

[0023] Fig.17 for Fig.14 Assembly diagram of the middle and upper end cover, air guide, fixing plate, air guide, third baffle and lower end cover. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Please refer to Figure 1-2 , Figure 1 This is a schematic structural diagram of a gas-liquid separator 100 in the first embodiment of the present application; Figure 2 for Figure 1 Schematic diagram of the assembly of the middle and upper end cover 11, the inlet pipe 3 and the outlet pipe 2.

[0026] The gas-liquid separator 100 in this embodiment includes a shell 1 , which in this embodiment specifically includes an upper end cover 11 , a body 12 and a lower end cover 13 . Figure 1 In the embodiment, the body 12 of the shell 1 is cylindrical, and the top and bottom of the body 12 are both open. The upper end cover 11 and the lower end cover 13 are respectively covered on the top opening and the bottom opening of the body 12, so as to assemble and form a closed shell 1. The gas-liquid separator 100 also includes an inlet pipe 3 and an outlet pipe 2, and the inlet pipe 3 and the outlet pipe 2 are both installed on the upper end cover 11. Figure 2 As shown, the upper end cover 11 is provided with an inlet joint 11b and an outlet joint 11a, the inlet pipe 3 is installed at the inlet joint 11b, and the outlet pipe 2 is installed at the outlet joint 11a, so as to connect the inner cavity of the shell 1 with the external pipeline. It should be noted that the "upper" and "lower" mentioned herein are based on Figure 1 The definition is made for the perspective, that is, the side of the shell 1 provided with the inlet pipe 3 and the outlet pipe 2 is defined as the upper side, and the opposite side is defined as the lower side. This definition does not limit the structure itself.

[0027] Can continue to combine Figure 3 , 4 understand, Figure 3 for Figure 1 A schematic diagram of the structure of the middle U-shaped tube 5; Figure 4 for Figure 3 Front view of the middle U-shaped tube 5.

[0028] In addition, in this embodiment, a U-shaped tube 5 for gas-liquid separation is also provided. The U-shaped tube 5 is located in the housing 1. The U-shaped tube 5 includes two tube sections arranged substantially side by side, namely a first tube section 51 and a second tube section 52. Figure 4 The first pipe section 51 is a straight pipe section, and the second pipe section 52 has a broken line section. The first pipe section 51 and the second pipe section 52 extend up and down, and the lower ends of the two pipe sections are connected by a transition section 53. The transition section 53 is an elbow structure. In this way, the three sections are combined to form a U-shaped structure. The upper end pipe openings of the first pipe section 51 and the second pipe section 52 of the U-shaped pipe 5 are arranged side by side. One is open and arranged in the shell 1, and the other is connected to the outlet pipe 2. Figure 4As shown, the upper end pipe opening 5b of the first pipe section 51 is open, and the upper end pipe opening 5c ​​of the second pipe section 52 is used to communicate with the outlet pipe 2. In this way, the gas-liquid two-phase refrigerant enters the shell 1 from the inlet pipe 3. Due to the different specific gravities of the gaseous and liquid refrigerants, the gaseous refrigerant floats up under the action of gravity, and can enter the U-shaped tube 5 from the upper end pipe opening 5b of the first pipe section 51 of the U-shaped tube 5, and then be discharged from the outlet pipe 2, while the liquid refrigerant and the refrigeration oil carried can sink to the bottom of the shell 1.

[0029] It is worth noting that the lower end cavity of the gas-liquid separator 100 in this embodiment is formed with a first cavity and a second cavity, the first cavity and the second cavity are connected to each other, the lower end cavity is specifically the cavity of the lower end cover 13 in this embodiment, the gas-liquid separator 100 also includes a filter component 7, a drying component 6 and a blocking net structure, wherein the filter component 7 is arranged in the second cavity, the drying component 6 is arranged in the first cavity, and the blocking net structure is used to limit the drying component 6 to improve its shaking. Specifically, the blocking net structure in this embodiment includes a first blocking net 81.

[0030] You can continue to refer to Figure 1 , and combined with Figure 5 , 6 understand, Figure 5 for Figure 1 A schematic diagram of the structure of the first baffle 81; Figure 6 for Figure 5 Axial cross-sectional view of the first baffle 81.

[0032] In this embodiment, the fixing member 8 is specifically a first annular screen 81, which has a through hole 811a. The first annular screen 81 is covered on the top of the first cavity. It can also be understood that the first screen 81 is a component that separates the first cavity. The first screen 81 can also be fixed to the housing 1 in this embodiment. Specifically, as shown in FIG. Figure 1 As shown, the first retaining net 81 can be clamped between the lower end cover 13 and the body 12. In this way, the first retaining net 81 can be fixed to the shell 1 during the assembly process of the shell 1, without welding or other fastening components for fixed connection, and the connection is simple and reliable. Of course, the first retaining net 81 can be directly pressed into the shell 1, or fixed to the shell 1 by welding or fasteners.

[0033] Figure 1In the embodiment, the lower end cover 13 of the shell 1 can be provided with a step 131 facing the body 12, and the first baffle 81 is clamped between the body 12 and the step 131. During assembly, the first baffle 81 can be supported on the step 131, and then the body 12 and the lower end cover 13 are assembled together. The step 131 is provided, and the outer peripheral wall of the body 12 can contact the step side wall at the position of the step 131. In this way, the contact area between the body 12 and the lower end cover 13 is larger, the assembly is more reliable, the sealing is better, and it is conducive to axial and radial limiting of the first baffle 81. Of course, the body 12 is provided with a step facing the lower end cover 13, and the first baffle 81 is clamped between the step of the body 12 and the lower end cover 13. It is also a feasible solution. This embodiment does not make specific restrictions, but the upward step 131 is provided to be more conducive to the support and positioning of the first baffle 81 during assembly.

[0034] The first retaining net 81 is specifically annular and has a middle hole 81a. In this way, after the first retaining net 81 and the housing 1 are fixed, the U-shaped tube 5 can be abutted and matched with the hole wall of the middle hole 81a of the first retaining net 81 to fix the U-shaped tube 5. In this embodiment, the first retaining net 81 specifically includes an annular flat plate section 811 and a conical plate section 812. The conical plate section 812 gradually shrinks toward the bottom of the housing 1. The large end of the conical plate section 812 is connected to the inner edge of the flat plate section 811. When the U-shaped tube 5 passes through the first retaining net 81, the conical plate section 812 of the first retaining net 81 can undergo a certain deformation to abut against the U-shaped tube 5, thereby fixing the U-shaped tube 5. The effect of such abutment and press-fitting is more reliable. Of course, the first retaining net 81 is directly set as the flat plate section 811, and the U-shaped tube 5 is directly press-fitted and fixed with the inner hole wall of the flat plate section 811.

[0035] It can be seen that the U-shaped tube 5 of the gas-liquid separator 100 in this embodiment can be fixed by the first retaining net 81, thereby reducing or preventing the noise generated by the vibration of the U-shaped tube 5. In particular, in this embodiment, the first retaining net 81 for fixing the U-shaped tube 5 is clamped between the body 12 and the lower end cover 13, and the assembly is more convenient.

[0036] You can continue to refer to Figure 1 , and combined with Figure 7-8 understand, Figure 7 for Figure 1 An exploded view of the first baffle 81, the drying component 6, the baffle 9 and the lower end cover 13; Figure 8 for Figure 7 Schematic diagram of the second baffle 9.

[0037] In this embodiment, the gas-liquid separator 100 is further provided with a drying component 6, which is arranged at the bottom of the shell 1, specifically, in the second cavity. In this embodiment, the second cavity is located in the middle of the inner cavity of the lower end cover 13, and the first cavity is arranged around the second cavity. Figure 1In the embodiment, the lower end cover 13 is a cap-shaped structure with an upper opening. The lower end cover 13 has an inner cavity, which is the lower end cavity of the shell 1. The drying component 6 is arranged in the inner cavity of the lower end cover 13. The bottom of the U-shaped tube 5 is provided with an oil return hole 5a. The filter component 7 is installed at the position of the oil return hole 5a. At this time, the filter component 7 is located in the second cavity, and the bottom of the U-shaped tube 5 is also located in the middle of the inner cavity of the lower end cover 13. The drying component 6 can dry the sinking liquid refrigerant to absorb and dry the moisture in the liquid refrigerant. Figure 3 , 4 As shown, an oil return hole 5a is provided at the bottom of the U-shaped tube 5. The dried liquid refrigerant and refrigeration oil can be sucked into the U-shaped tube 5 from the oil return hole 5a under the action of the high-speed flowing gaseous refrigerant in the U-shaped tube 5, and atomized under the action of the high-speed flowing gaseous refrigerant, and return to the compressor together with the gaseous refrigerant.

[0038] It can be seen that in this embodiment, a drying component 6 is provided at the bottom of the shell 1, so that the liquid refrigerant and the refrigeration oil can be dried, and after drying, they enter the U-shaped tube 5 through the oil return hole 5a, which can reduce or avoid the entry of moisture into the compressor to cause liquid hammer, thereby protecting the compressor.

[0039] The drying component 6 in this embodiment specifically includes bulk drying particles, such as molecular sieves. At this time, the gas-liquid separator 100 is also provided with a second baffle 9. Figure 1 In the embodiment, the second screen 9 is a cylindrical structure. The second screen 9 and the inner wall of the lower end cover 13 and the first screen 81 enclose an annular cavity, which is the first cavity. The drying particles of the drying component 6 can be filled in the annular cavity. The first screen 81 is covered on the top of the annular cavity, so that the drying component 6 can be reliably limited. The first screen 81 and the drying component 6 can have a small gap, contact or abutment and pressing, and the abutment and pressing can better limit the drying component 6. The second screen 9 is provided with a plurality of holes 9a, so that the first cavity and the second cavity are interconnected to allow the liquid refrigerant and the refrigeration oil to pass through the hole 9a after passing through the drying component 6 and enter the oil return hole 5a at the bottom of the U-shaped tube 5, and also allow the liquid refrigerant and the refrigeration oil inside the second screen 9 to fully contact with the drying component 6 through the hole 9a to improve the drying effect.

[0040] In this embodiment, the second baffle 9 is cylindrical, and the filter component 7 is limited in the annular first cavity. The inner cavity of the second baffle 9 is not blocked, and the bottom of the U-shaped tube 5 can be inserted into the inner cavity of the second baffle 9, and is located on the inner side of the annular drying component 6. In this way, the bottom of the U-shaped tube 5 can be as close to the bottom of the shell 1 as possible, so that more liquid refrigerant and refrigeration oil stored at the bottom of the shell 1 can be sucked in.

[0041] Please look again Fig. 9 , Fig. 9 for Figure 1 Schematic diagram of the structure of the filter component 7.

[0042] In this embodiment, the U-shaped tube 5 is also equipped with a filter component 7, which is installed at the oil return hole 5a. The liquid refrigerant and the refrigeration oil are filtered by the filter component 7 before entering the U-shaped tube 5 to reduce or avoid impurities entering the compressor, and also to prevent impurities from clogging the inlet 5a. Fig. 9 In the figure, the filter component 7 includes a skeleton 72, a part of the outer side of the skeleton 72 is covered with a filter element 71, and a channel 72a is also opened on the skeleton 72. One end of the skeleton 72 can be inserted into the return oil hole 5a of the U-shaped tube 5. After insertion, it can be welded and fixed to the U-shaped tube 5. Liquid refrigerant and refrigeration oil can enter the channel 72a after being filtered by the filter element 71, and then enter the U-shaped tube 5.

[0043] In addition, if Fig.10 , 11 As shown, Fig.10 for Figure 1 A schematic structural diagram of the middle air guide 4; Fig.11 for Fig.10 A top view of the middle air guide 4.

[0044] The gas-liquid separator 100 in this embodiment also includes an air guide member 4, which is located inside the shell 1 and can be specifically installed on the inner side of the upper end cover 11 and is connected to the inlet pipe 3. After the gas-liquid two-phase refrigerant enters the shell 1 from the inlet pipe 3, it first passes through the air guide member 4. The air guide member 4 is used to guide the gas-liquid two-phase refrigerant to rotate inside the shell 1 to accelerate the separation of the gaseous refrigerant and the liquid refrigerant. Fig.10 In the embodiment, the air guide 4 includes a bottom plate 44, three side plates arranged around the bottom plate 44, namely, a first side plate 41, a second side plate 42 and a third side plate 43, that is, the air guide 4 is roughly a square structure with an opening on the top and one side, and the top opening is connected to the inlet pipe 3. After the gas-liquid two-phase refrigerant enters the air guide 4, it will generate a deflection, thereby facilitating the refrigerant to rotate and diffuse in the shell 1. A flange 4a can be set at the top of each side plate, and a corresponding connecting hole 4c is set to fix it with the shell 1. Strengthening flanges 4b can also be set on both sides of the second side plate 42 located in the middle of the air guide 4.

[0045] Please continue to refer to Fig.12 , 13 , Fig.12 This is a schematic structural diagram of a gas-liquid separator 100 in the second embodiment of the present application; Fig.13 for Fig.12 Schematic diagram of the assembly of the first baffle 81, the drying component 6, and the lower end cover 13.

[0046] The structure of this embodiment is basically the same as that of the first embodiment, the only difference is that the drying core of the drying component 6 in this embodiment is a block desiccant, and the second baffle 9 is no longer needed. The other structures are the same and will not be described in detail.

[0047] like Fig.12 As shown, the drying core of the drying component 6 is an annular whole block structure. At this time, the drying component 6 does not need to be limited by the second baffle 9, and the drying component 6 can be directly installed on the bottom of the shell 1. The first baffle 81 is set on the top of the drying component 6, and can have a small gap or contact or abut with the drying component 6 to limit the axial position of the drying component 6. At this time, the inner cavity of the annular drying component 6 is the second cavity, and the chamber where the annular drying component 6 is located is the first cavity. The drying component 6 does not have to be a whole block structure, but can also be formed by splicing multiple structures, which can be spliced ​​axially or radially, such as two semicircular block desiccants spliced ​​together circumferentially.

[0048] Please continue to refer to Figure 14-17 , Fig.14 This is a schematic structural diagram of a gas-liquid separator 100 in the third embodiment of the present application; Fig.15 for Fig.14 Schematic diagram of the assembly of the middle U-shaped tube 5, the upper end cover 11, and the fixing plate 82; Fig.16 for Fig.14 Schematic diagram of the assembly of the middle baffle 9 and the lower end cover 13; Fig.17 for Fig.14 Schematic diagram of the assembly of the middle upper end cover 11, the air guide member 4, the fixing plate 82, the air guide member 4, the third baffle 10, and the lower end cover 13.

[0049] The structure of this embodiment is also substantially the same as that of the first embodiment, except that the structures of the fixing component 8 and the drying component 6 are different, and the remaining identical structures will not be described in detail.

[0050] In this embodiment, the gas-liquid separator also includes a fixed plate 82, which is a strip-shaped plate structure. The fixed plate 82 can be spot-welded to the first pipe section 51 and the second pipe section 52 of the U-shaped tube 5, and then at least one end of the fixed plate 82 is fixed to the inner wall of the shell 1, for example, it can also be fixed by welding. Fig.15 In the embodiment, a bending portion 821 is provided at one end of the fixing plate 82, and the bending portion 821 is convenient for being attached to the inner wall of the shell 1 for welding, thereby increasing the welding area and improving the welding reliability. It is known that the bending portion 821 may not be provided, and the end of the fixing plate 82 may be directly abutted against the inner wall of the shell 1 for welding. In addition, the fixing plate 82 may be provided in the first and second embodiments to fix the U-shaped tube 5 and the shell, but the first annular blocking net 81 in the first and second embodiments can fix the U-shaped tube 5 while limiting the drying component 6, and does not require welding, which is more convenient.

[0051] In addition, if Fig.14 As shown, in the third embodiment, the drying component 6 is also bulk dry particles, and the gas-liquid separator 100 is provided with a third baffle 10. The third baffle 10 is different from the cylindrical second baffle 9 in the first embodiment. In this embodiment, the third baffle 10 is a plate-shaped mesh structure, and a channel 10a is also provided to allow liquid refrigerant and refrigeration oil to pass through. The third baffle 10 is covered above the drying component 6 to limit the drying component 6 and separate the lower end cavity of the shell 1 into a second cavity located on the upper side and a first cavity located on the lower side. The third baffle 10 here plays the function of the first baffle 81 in the first embodiment, and is used as a component to separate the first cavity and the second cavity, and is used to limit the drying component 6. The third baffle 10 can press the drying component 6 arranged at the bottom of the shell 1 axially downward, and the drying component 6 is directly filled at the bottom of the shell 1. In addition, the outer edge of the third baffle 10 is also provided with a baffle flange 101 extending upward, and the annular baffle flange 101 can be well fitted with the inner wall of the shell 1, specifically, with the inner wall of the lower end cover 13, and the third baffle 10 can be pressed into the lower end cover 13. It can be seen that the drying component 6 in the third embodiment can also be a block structure. In this case, the third baffle 10 can be set or not. Compared with the third embodiment, the drying component 6 in the first and second embodiments is set in an annular manner, so the bottom of the U-shaped tube 5 can be closer to the bottom of the shell 1, which is more conducive to the suction of liquid refrigerant and refrigeration oil.

[0052] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A gas-liquid separator, characterized in that: It includes a shell and a U-shaped tube, at least part of the U-shaped tube is located in the shell; an oil return hole is opened at the bottom of the U-shaped tube, and the lower end cavity of the shell forms a first cavity and a second cavity that are interconnected; the gas-liquid separator also includes a filter component and a drying component, the filter component is installed at the position of the oil return hole, the drying component is located in the first cavity, and the filter component is located in the second cavity, and the gas-liquid separator also includes a retaining net structure, which is used to limit the drying component.

2. The gas-liquid separator according to claim 1, characterized in that: The second cavity is located in the middle of the lower end cavity, and the first cavity surrounds the second cavity.

3. The gas-liquid separator according to claim 2, characterized in that: The retaining net structure comprises an annular first retaining net, the U-shaped tube passes through the middle hole of the first retaining net and abuts against the hole wall of the middle hole for fixation; the first retaining net cover is arranged on the top of the first cavity.

4. The gas-liquid separator according to claim 3, characterized in that: The screen structure also includes a cylindrical second screen, the inner cavity of the second screen forms the second cavity, the annular cavity formed by the second screen, the first screen and the inner wall of the shell is the first cavity, and the drying component includes desiccant particles, and the drying component is filled in the first cavity.

5. The gas-liquid separator according to claim 3, characterized in that: The drying component is annular, and includes a block desiccant, and the block desiccant is annular, or the drying component includes a plurality of block desiccant, and the plurality of block desiccant are assembled to form the annular drying component; the inner cavity of the annular drying component is the second cavity; the cavity where the drying component is located is the first cavity.

6. The gas-liquid separator according to claim 3, characterized in that: The first baffle includes an annular flat plate section and a conical plate section connected axially, the conical plate section gradually shrinks toward the bottom of the shell, the large end of the conical plate section is connected to the inner edge of the flat plate section, and the U-shaped tube abuts against the conical plate section.

7. The gas-liquid separator according to any one of claims 3 to 6, characterized in that: The shell includes a body and a lower end cover, the inner cavity of the lower end cover forms the lower end cavity, the bottom of the body is open, and the lower end cover is used to seal the opening at the bottom of the body; the first baffle net is clamped between the body and the lower end cover to fix the first baffle net and the shell.

8. The gas-liquid separator according to claim 7, characterized in that: The lower end cover and the lower end of the body are provided with a step facing the other one, and the first baffle net is clamped between the step of the one and the other one.

9. The gas-liquid separator according to claim 1, characterized in that: The retaining net structure includes a third retaining net, and the third retaining net separates the lower end cavity into the second cavity located at the upper side and the first cavity located at the lower side.

10. The gas-liquid separator according to any one of claims 1 to 7 and 9, characterized in that: The gas-liquid separator comprises a fixing plate, the fixing plate and the U-shaped tube are welded, and at least one end of the fixing plate is welded to the inner wall of the shell.

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