A gas-liquid separator

Abstract

The application provides a gas-liquid separator, which comprises 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 arranged at the bottom of the U-shaped tube, a lower end cavity of the shell is formed with a first cavity and a second cavity which are in communication; the gas-liquid separator further comprises 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, the filter component is located in the second cavity, and the gas-liquid separator further comprises a screen structure which is used for limiting the drying component. The gas-liquid separator can improve the stability of the drying component.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning system parts, in particular to a gas-liquid separator. BACKGROUND

[0002] The gas-liquid separator separates gaseous and liquid refrigerants, so that the refrigerant enters the compressor in the form of gas from the suction port of the compressor, prevents liquid impact on the compressor, and recovers refrigerant oil to the compressor to ensure normal operation of the compressor.

[0003] The U-shaped tube is arranged in the gas-liquid separator, the liquid phase in the gas-liquid two-phase refrigerant entering the gas-liquid separator sinks, and the gas phase enters from one port of the U-shaped tube and is discharged from the other port of the U-shaped tube. The gas-liquid separator also has a drying component clamped on the U-shaped tube, but the drying component is prone to loosening. SUMMARY

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

[0005] The gas-liquid separator provided by the present application comprises a shell and a U-shaped tube, at least part of the U-shaped tube is located in the shell, the bottom of the U-shaped tube is provided with an oil return hole, the lower end cavity of the shell is formed with a first cavity and a second cavity which are in communication, the gas-liquid separator further comprises 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, the filter component is located in the second cavity, and the gas-liquid separator further comprises a screen structure for limiting the drying component.

[0006] In the gas-liquid separator of the present application, the drying component is arranged in the lower end cavity of the shell, the lower end cavity of the shell is used as a container for containing the drying component, and the drying component is not prone to loosening. In addition, the filter component and the drying component are arranged in the lower end cavity and are arranged in different cavities, on the one hand, the dried refrigerant oil and the refrigerant can enter the filter component, and on the other hand, the two components do not interfere with each other. BRIEF DESCRIPTION OF DRAWINGS

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

[0008] Figure 2 It is a structure schematic view of the gas-liquid separator in the first embodiment of the present application; Figure 1 It is an assembly schematic view of the upper end cover, the inlet pipe and the outlet pipe in the first embodiment of the present application;

[0009] Figure 3 It is a structure schematic view of the U-shaped tube in the first embodiment of the present application; Figure 1 It is a structure schematic view of the U-shaped tube in the first embodiment of the present application;

[0010] Figure 4 for Figure 3 Front view of the U-shaped tube;

[0011] Figure 5 for Figure 1 A schematic diagram of the structure of the first barrier net in the middle;

[0012] Figure 6 for Figure 5 Axial sectional view of the first retaining wall in the middle;

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

[0014] Figure 8 for Figure 7 A schematic diagram of the second barrier net;

[0015] Figure 9 for Figure 1 Schematic diagram of the middle filter component;

[0016] Figure 10 for Figure 1 Schematic diagram of the central air guide component;

[0017] Figure 11 for Figure 10 Top view of the central air guide component;

[0018] Figure 12 This is a schematic diagram of the gas-liquid separator in the second embodiment of this application;

[0019] Figure 13 for Figure 12 Assembly diagram of the first baffle, drying components, and lower end cover;

[0020] Figure 14 This is a schematic diagram of the gas-liquid separator in the third embodiment of this application;

[0021] Figure 15 for Figure 14 Assembly diagram of the U-shaped tube, the upper end cap, and the fixing plate;

[0022] Figure 16 for Figure 14 Assembly diagram of the third baffle and the lower end cover;

[0023] Figure 17 for Figure 14 Assembly diagram of the upper and middle end caps, air guides, fixing plates, air guides, third baffle, and lower end caps. Detailed Implementation

[0024] In order to make the person skilled in the art better understand the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

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

[0026] The gas-liquid separator 100 in this embodiment comprises a shell 1, which in this embodiment specifically comprises an upper end cover 11, a body 12 and a lower end cover 13. Figure 1 In this embodiment, the body 12 of the shell 1 is cylindrical, and the top and bottom of the body 12 are both open, and 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, thereby assembling to form a closed shell 1. The gas-liquid separator 100 further comprises an inlet pipe 3 and an outlet pipe 2, both of which are installed on the upper end cover 11. As shown in Figure 2 , the upper end cover 11 is provided with an inlet joint 11b and an outlet joint 11a, the inlet pipe 3 is installed on the inlet joint 11b, and the outlet pipe 2 is installed on the outlet joint 11a, so as to connect the inner cavity of the shell 1 and the external pipeline. It should be noted that the "upper" and "lower" described herein are defined from the perspective, i.e. the side where the shell 1 is provided with the inlet pipe 3 and the outlet pipe 2 is defined as upper, and the opposite side is defined as lower, which does not limit the structure itself. Figure 1

[0027] It can be further understood that Figure 3 , 4 , Figure 3 for Figure 1 the structural schematic diagram of the U-shaped pipe 5 in this embodiment; Figure 4 for Figure 3 the front view of the U-shaped pipe 5 in this embodiment.

[0028] In addition, a U-shaped pipe 5 for gas-liquid separation is also provided in this embodiment, which is located in the shell 1, and the U-shaped pipe 5 comprises two substantially side-by-side arranged pipe sections, which are a first pipe section 51 and a second pipe section 52, Figure 4 in which 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 upward and downward, and the lower ends of the two pipe sections are connected by a transition section 53 which is a elbow structure, so that the three sections form a U-shaped structure, and the upper end openings of the side-by-side first pipe section 51 and the second pipe section 52 of the U-shaped pipe 5 are respectively provided in the shell 1 and communicated with the outlet pipe 2, as shown in Figure 4 ​As shown, the upper end opening 5b of the first pipe section 51 is open, and the upper end 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, and due to the different specific gravities of the gaseous and liquid refrigerants, the gaseous refrigerant floats upward under the action of gravity and can enter the U-shaped pipe 5 from the upper end opening 5b of the first pipe section 51 of the U-shaped pipe 5, and then be discharged from the outlet pipe 2, while the liquid refrigerant and the refrigeration oil carried by the liquid refrigerant 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 the embodiment is formed with a first cavity and a second cavity, the first cavity and the second cavity are in communication with each other, the lower end cavity is specifically the cavity of the lower end cover 13 in the embodiment, the gas-liquid separator 100 further comprises a filter component 7, a drying component 6 and a screen structure, wherein the filter component 7 is arranged in the second cavity, the drying component 6 is arranged in the first cavity, and the screen structure is used to limit the drying component 6 and improve the shaking thereof. Specifically, the screen structure in the embodiment comprises a first screen 81.

[0030] It can be further understood that Figure 1 in combination with Figure 5 , 6 , Figure 5 the structure of the first screen 81 in the embodiment is shown in Figure 1 ; and Figure 6 the axial sectional view of the first screen 81 in the embodiment is shown in Figure 5 .

[0031] The fixing component 8 in the embodiment is specifically an annular first screen 81, the first screen 81 has a through hole 811a, and the annular first screen 81 is arranged on the top of the first cavity. It can also be understood that the first screen 81 serves as a component for separating the first cavity, and the first screen 81 can be fixed to the shell 1 in the embodiment. Specifically, as shown in Figure 1 , the first screen 81 can be clamped between the lower end cover 13 and the body 12. In this way, the first screen 81 can be fixed to the shell 1 during assembly of the shell 1, without the need for welding or the use of other fastening components for fixed connection. The connection is simple and reliable, and of course, the first screen 81 can be directly pressed into the shell 1, or be fixed to the shell 1 by welding or fastening.

[0032] Figure 1In this embodiment, the lower end cover 13 of the shell 1 can be provided with a step 131 facing the body 12. 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 can be assembled together. By providing the step 131, the outer peripheral wall of the body 12 can contact the side wall of the step 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 also beneficial to limit the first baffle 81 axially and radially. Of course, it is also feasible to provide a step facing the lower end cover 13 on the body 12 and clamp the first baffle 81 between the step of the body 12 and the lower end cover 13. This embodiment does not impose a specific limitation, but providing an upward step 131 is more conducive to supporting and positioning the first baffle 81 during assembly.

[0033] The first baffle 81 is specifically annular, with a central hole 81a. After the first baffle 81 and the housing 1 are fixed, the U-shaped tube 5 can abut against the wall of the central hole 81a of the first baffle 81 to fix the U-shaped tube 5. In this embodiment, the first baffle 81 specifically includes an annular flat plate segment 811 and a tapered plate segment 812. The tapered plate segment 812 tapers towards the bottom of the housing 1, and its large end connects to the inner edge of the flat plate segment 811. When the U-shaped tube 5 passes through the first baffle 81, the tapered plate segment 812 of the first baffle 81 can undergo a certain deformation to abut against the U-shaped tube 5, thereby fixing the U-shaped tube 5. This abutment-press-fit fixing effect is more reliable. Of course, if the first baffle 81 is directly set as a flat plate segment 811, the U-shaped tube 5 can also be directly press-fitted and fixed to the inner wall of the flat plate segment 811.

[0034] Therefore, 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 baffle 81, thereby reducing or preventing noise caused by vibration of the U-shaped tube 5. Especially in this embodiment, the first baffle 81 for fixing the U-shaped tube 5 is clamped between the body 12 and the lower end cap 13, which makes assembly more convenient.

[0035] You can continue to refer to this. Figure 1 and combined Figures 7-8 understand, Figure 7 for Figure 1 Exploded view of the first baffle 81, drying component 6, baffle 9, and lower end cover 13; Figure 8 for Figure 7 A schematic diagram of the second barrier net 9.

[0036] In this embodiment, the gas-liquid separator 100 is further provided with a drying component 6, which is disposed at the bottom of the housing 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 surrounds the second cavity. Figure 1In the embodiment, the lower end cover 13 is a hat-shaped structure with an upper opening, and the lower end cover 13 has an inner cavity, that is, a 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 filtering component 7 is arranged at the position of the oil return hole 5a. At this time, the filtering component 7 is located in the second cavity, and the bottom of the U-shaped tube 5 is located in the middle of the inner cavity of the lower end cover 13. The sinking liquid refrigerant can be dried by the drying component 6 to absorb and dry the water in the liquid refrigerant. As shown in Figure 3 、 4 , the bottom of the U-shaped tube 5 is provided with an oil return hole 5a. The dried liquid refrigerant and refrigerant 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 returned to the compressor together with the gaseous refrigerant.

[0037] Therefore, in the embodiment, the bottom of the shell 1 is provided with the drying component 6, so that the liquid refrigerant and the refrigerant oil can be dried, and after drying, the liquid refrigerant and the refrigerant oil enter the U-shaped tube 5 through the oil return hole 5a, which can reduce or avoid the water entering the compressor to cause liquid hammer, thereby protecting the compressor.

[0038] The drying component 6 in the embodiment specifically includes bulk drying particles, for example, molecular sieve. At this time, the gas-liquid separator 100 is further provided with a second screen 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 surround to form an annular cavity, that is, the first cavity. The drying particles of the drying component 6 can be filled in the annular cavity. The first screen 81 is arranged above the annular cavity, so as to reliably position the drying component 6. The first screen 81 and the drying component 6 can have a small gap, contact or abutment and pressing. The abutment and pressing can better position the drying component 6. The second screen 9 is provided with a plurality of hole portions 9a. In this way, the first cavity and the second cavity are in communication with each other, so as to allow the liquid refrigerant and the refrigerant oil to pass through the hole portions 9a after passing through the drying component 6, and enter the oil return hole 5a at the bottom of the U-shaped tube 5. At the same time, the liquid refrigerant and the refrigerant oil inside the second screen 9 can pass through the hole portions 9a to fully contact the drying component 6, so as to improve the drying effect.

[0039] 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 surround to form an annular cavity, that is, the first cavity. The drying particles of the drying component 6 can be filled in the annular cavity. The first screen 81 is arranged above the annular cavity, so as to reliably position the drying component 6. The first screen 81 and the drying component 6 can have a small gap, contact or abutment and pressing. The abutment and pressing can better position the drying component 6. The second screen 9 is provided with a plurality of hole portions 9a. In this way, the first cavity and the second cavity are in communication with each other, so as to allow the liquid refrigerant and the refrigerant oil to pass through the hole portions 9a after passing through the drying component 6, and enter the oil return hole 5a at the bottom of the U-shaped tube 5. At the same time, the liquid refrigerant and the refrigerant oil inside the second screen 9 can pass through the hole portions 9a to fully contact the drying component 6, so as to improve the drying effect.

[0040] Please see again Figure 9 , Figure 9 ​Figure 1 A schematic diagram of the structure of the middle filter component 7.

[0041] 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. After the liquid refrigerant and refrigeration oil are filtered by the filter component 7, they enter the U-shaped tube 5 to reduce or avoid impurities from entering the compressor and to prevent impurities from clogging the inlet 5a. Figure 9 In the filter component 7, there is a frame 72, and a filter element 71 is covered on the outer side of part of the frame 72. The frame 72 is also provided with a channel 72a. One end of the frame 72 can be inserted into the oil return 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 be filtered by the filter element 71 and enter the channel 72a, and then enter the U-shaped tube 5.

[0042] In addition, such as Figure 10 , 11 As shown, Figure 10 for Figure 1 Schematic diagram of the structure of the central air guide component 4; Figure 11 for Figure 10 Top view of the central air guide component 4.

[0043] The gas-liquid separator 100 in this embodiment also includes a gas guide 4, which is located inside the housing 1. Specifically, it can be installed inside the upper end cover 11 and connected to the inlet pipe 3. After the gas-liquid two-phase refrigerant enters the housing 1 from the inlet pipe 3, it first passes through the gas guide 4. The gas guide 4 is used to guide the gas-liquid two-phase refrigerant to rotate inside the housing 1, so as to accelerate the separation of gaseous refrigerant and liquid refrigerant. Figure 10 In this structure, the air guide 4 includes a base plate 44 and three side plates surrounding the base plate 44: a first side plate 41, a second side plate 42, and a third side plate 43. The air guide 4 is roughly a cuboid structure with an opening at the top and one side. The top opening connects to the inlet pipe 3. After the gas-liquid two-phase refrigerant enters the air guide 4, it creates a baffle, facilitating the rotation and diffusion of the refrigerant within the housing 1. Each side plate can have a flange 4a at its top and corresponding connecting holes 4c for fixing to the housing 1. Reinforcing flanges 4b can also be provided on both sides of the second side plate 42 located in the middle of the air guide 4.

[0044] Please continue to refer to this. Figure 12 , 13 , Figure 12 This is a schematic diagram of the structure of the gas-liquid separator 100 in the second embodiment of this application; Figure 13 for Figure 12 A schematic diagram of the assembly of the first baffle 81, the drying component 6, and the lower end cover 13.

[0045] The embodiment is basically same as the first embodiment in structure, and the only difference is that the drying core of the drying part 6 is a block-shaped drying agent in the embodiment, so that the second blocking net 9 is no longer needed, and other structures are the same and will not be repeated here.

[0046] As shown in Figure 12 , the drying core of the drying part 6 is an annular whole block structure, at this time, the drying part 6 does not need to be limited by the second blocking net 9, and the drying part 6 can be directly installed at the bottom of the shell 1, and the first blocking net 81 is arranged above the drying part 6 and can have a small gap with the drying part 6 or be in contact or abutment with the drying part 6, so as to limit the drying part 6 in the axial direction, at this time, the inner cavity of the annular drying part 6 is the second cavity, and the cavity where the annular drying part 6 is located is the first cavity. The drying part 6 is not necessarily a whole block structure, but can also be a multi-block structure spliced together, which can be spliced together along the axial direction or along the radial direction, for example, two semicircular block-shaped drying agents can also be spliced together along the circumferential direction.

[0047] Please continue to refer to Figures 14-17 , Figure 14 , it is a structural schematic view of the gas-liquid separator 100 in the third embodiment of the present application; Figure 15 is Figure 14 an assembly schematic view of the U-shaped tube 5, the upper end cover 11 and the fixed plate 82 in the third embodiment; Figure 16 is Figure 14 an assembly schematic view of the blocking net 9 and the lower end cover 13 in the third embodiment; Figure 17 is Figure 14 an assembly schematic view of the upper end cover 11, the air guide part 4, the fixed plate 82, the air guide part 4, the third blocking net 10 and the lower end cover 13 in the third embodiment.

[0048] The embodiment is also basically same as the first embodiment in structure, and the difference is that the structures of the fixed part 8 and the drying part 6 are different, and other same structures will not be repeated here.

[0049] In the embodiment, the gas-liquid separator further includes a fixed plate 82, which is a strip-shaped plate structure, and the fixed plate 82 can be spot-welded with the first tube section 51 and the second tube 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, can also be welded. Figure 15 In the third embodiment, one end of the fixed plate 82 is provided with a bending part 821, which is convenient to fit to the inner wall of the shell 1 for welding, increases the welding area and improves the welding reliability. It can be known that the bending part 821 can also not be provided, and the end of the fixed plate 82 can also be directly abutted to the inner wall of the shell 1 for welding. In addition, the fixed plate 82 can also be provided in the above first and second embodiments to fix the U-shaped tube 5 and the shell, and the annular first blocking net 81 in the first and second embodiments can also fix the U-shaped tube 5 while limiting the drying part 6, and at the same time, welding is not needed, which is more convenient.

[0050] In addition, as shown in Figure 14 The third embodiment is also a bulk drying granule, and the gas-liquid separator 100 is provided with a third baffle 10, which is different from the cylindrical second baffle 9 in the first embodiment. In this embodiment, the third baffle 10 is a plate-shaped net structure, and is also provided with a channel 10a for the passage of liquid refrigerant and refrigeration oil. The third baffle 10 is arranged above the drying component 6 to limit the drying component 6, thereby dividing the lower end cavity of the shell 1 into a second cavity on the upper side and a first cavity 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 for separating the first cavity and the second cavity to limit the drying component 6. The third baffle 10 can press the drying component 6 arranged at the bottom of the shell 1 downward in the axial direction, 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 an upwardly extending baffle flange 101. The annular baffle flange 101 can be better attached to the inner wall of the shell 1, specifically to the inner wall of the lower end cover 13, and the third baffle 10 can be press-fitted 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, and the third baffle 10 can be arranged or not arranged. Compared with the third embodiment, the drying component 6 in the first and second embodiments is arranged in a ring shape, and 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.

[0051] The principles and implementation modes of the present application are described by using specific examples in this paper, and the above description of the examples is only used to help understand the method and its core idea. It should be noted that for ordinary skilled persons in the technical field, some improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A gas-liquid separator, characterized in that, The gas-liquid separator includes a housing and a U-shaped tube, at least a portion of which is located within the housing. The bottom of the U-shaped tube has an oil return hole. The lower end cavity of the housing forms a first cavity and a second cavity that communicate with each other. The gas-liquid separator also includes a filter component and a drying component. The filter component is installed at the oil return hole, the drying component is located in the first cavity, and the filter component is located in the second cavity. The gas-liquid separator also includes a baffle structure for limiting the position of the drying component. The baffle structure includes an annular first baffle, the U-shaped tube passes through the central hole of the first baffle and abuts against the wall of the central hole to be fixed; the first baffle covers the top of the first cavity.

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

3. The gas-liquid separator according to claim 2, characterized in that, The baffle structure further includes a cylindrical second baffle, the inner cavity of which forms the second cavity, and the annular cavity formed by the second baffle, the first baffle, and the inner wall of the shell is the first cavity. The drying component includes desiccant particles and is filled in the first cavity.

4. The gas-liquid separator according to claim 3, characterized in that, The drying component is annular, and the drying component includes block desiccant, which is annular, or the drying component includes multiple block desiccants, which are assembled to form the annular drying component; the inner cavity of the annular drying component is the second cavity; the chamber in which the drying component is located is the first cavity.

5. The gas-liquid separator according to claim 3, characterized in that, The first baffle includes an annular flat plate segment and a conical plate segment connected along the axial direction. The conical plate segment tapers towards the bottom of the housing. The large end of the conical plate segment is connected to the inner edge of the flat plate segment. The U-shaped tube abuts against the conical plate segment.

6. The gas-liquid separator according to any one of claims 3-5, characterized in that, The housing 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 has an opening, and the lower end cover is used to seal the opening at the bottom of the body. The first baffle is clamped between the body and the lower end cover to fix the first baffle and the housing.

7. The gas-liquid separator according to claim 6, characterized in that, The lower end cap and the lower end of the vessel body are provided with a step facing the other, and the first baffle is clamped between the step of the one and the other.

8. The gas-liquid separator according to claim 1, characterized in that, The baffle structure includes a third baffle, which separates the lower cavity into a second cavity located on the upper side and a first cavity located on the lower side.

9. The gas-liquid separator according to any one of claims 1-5 and 8, characterized in that, The gas-liquid separator includes a fixed plate, which is welded to the U-shaped tube, and at least one end of the fixed plate is welded to the inner wall of the shell.

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