A gas-liquid separator

Abstract

The present invention discloses a gas-liquid separator, comprising a porous plate, a cover plate, an inner insert tube, and a flow-guiding anti-rotation cover plate, which are combined with the separator body in a cylinder below a top plate; the porous plate divides the space between the top plate (1) and the cover plate into a buffer chamber and an exhaust chamber; an inner insert tube (4) is arranged downward on the lower plate surface of the cover plate (3), and a flow-guiding anti-rotation cover plate (5) is arranged at intervals below the inner insert tube (4); the flow-guiding anti-rotation cover plate (5) is a truncated cone-shaped cylinder cover with an apron cover surface and a top plate surface, and the apron cover surface is circumferentially arranged with through-hole-shaped small holes (51), and the top plate surface (52) is a circular closed plate with a diameter smaller than the bottom opening diameter; the flow-guiding anti-rotation cover plate (5) divides the cylinder space below the cover plate (3) into two parts, namely a separation chamber (10) and a liquid collecting chamber (11). The structure is compact, and while ensuring the gas-liquid separation effect, the layout space of the gas-liquid separator is reduced, and the refrigerant filling amount can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigeration, and in particular relates to a vertical gas-liquid separator with a compact structure. Background Art

[0002] In the refrigeration and air conditioning system, the gas-liquid separator can separate the gas-liquid two-phase flow after the throttle valve of the condenser. The gaseous fluid enters the compressor through the air supply pipe, and the liquid fluid enters the evaporator for heat exchange. Compared with the air conditioning refrigeration system without a gas-liquid separator, the refrigeration and air conditioning system equipped with a gas-liquid separator can reduce the evaporator inlet enthalpy and improve the unit performance.

[0003] The main technical requirement for the gas-liquid separator is that the gas-liquid two-phase separation efficiency must be high enough. On the one hand, it can maximize the refrigeration performance of the unit, and on the other hand, it can prevent the liquid that has not been fully separated from the compressor from entering the gaseous fluid and forming liquid hammer.

[0004] The existing Chinese patent "Economizer and heat exchange system including the same (publication number: CN106642827A)" discloses a vertical economizer. It mainly has the following two problems:

[0005] 1. The lower liquid collecting chamber of the economizer occupies a large space and the refrigerant filling volume is large. For some expensive refrigerants (such as R1233zd), the cost is relatively high; 2. The economizer air supply adopts the top outlet form. The height of the air supply elbow in the actual unit connection will continue to increase the overall height of the economizer.

[0006] The existing Chinese patent "Gas-Liquid Separation Device and Economizer", publication number CN208968106U discloses a gas-liquid separation device. Although it adopts a single-side exhaust port, no airflow organization structure is set at the outlet, which will cause the flow velocity of the inner tube to be locally concentrated. Once the separation efficiency does not meet the requirements, the phenomenon of suction carrying liquid occurs, causing liquid hammer in the compressor. Summary of the invention

[0007] In order to solve the technical problems existing in various products in the above-mentioned background technology, the present invention provides a gas-liquid separator with a compact structure, which can reduce the layout space of the gas-liquid separator while ensuring the gas-liquid separation effect, and can reduce the refrigerant filling amount.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] A gas-liquid separator comprises a cylindrical separator body (7) having an inlet (8), a liquid outlet (9) and exhaust ports (61, 62) and a top plate (1) for sealing the top of the separator body (7), characterized in that:

[0010] It also includes a porous plate (2), a cover plate (3), an inner insert cylinder (4), and a flow guide anti-rotation cover plate (5) which are combined with the separator body (7) in the cylinder below the top plate (1);

[0011] The porous plate (2) is arranged between the top plate (1) and the cover plate (3), and divides the cylindrical space between the top plate (1) and the cover plate (3) into two parts, namely a buffer chamber (12) and an exhaust chamber (13);

[0012] An inner insert cylinder (4) is arranged downward on the lower plate surface of the cover plate (3), and a flow guide anti-rotation cover plate (5) is arranged at intervals below the inner insert cylinder (4);

[0013] The flow-guiding anti-rotation cover plate (5) is a truncated cone-shaped cylinder cover having an apron cover surface and a top plate surface, the apron cover surface is provided with through-hole-shaped small holes (51) in a circumferential arrangement, and the top plate surface (52) is a circular closed plate with a diameter smaller than the bottom opening diameter; the flow-guiding anti-rotation cover plate (5) divides the cylinder space below the cover plate (3) into two parts, namely a separation chamber (10) and a liquid collection chamber (11).

[0014] Furthermore, the lower edge of the apron cover surface of the flow-guiding anti-rotation cover plate (5) is connected to the inner wall of the separator body (7).

[0015] Furthermore, the through-hole-shaped small holes (51) are evenly arranged on the apron cover surface of the flow-guiding anti-rotation cover plate (5), and the projection of the through-hole-shaped small holes (51) on the central surface of the flow-guiding anti-rotation cover plate (5) is circular or rectangular.

[0016] Furthermore, from the lower edge of the flow-guiding anti-rotation cover plate (5) downward, the separator body (7) in the area where the liquid collecting chamber (11) is located is in a state of diameter contraction, and the liquid collecting chamber (11) is provided with a liquid outlet (9).

[0017] Furthermore, the separator body (7) in the area where the liquid collecting chamber (11) is located presents a conical structure with a shrinking diameter or an arc structure that bends inwardly relative to the cylinder of the separation chamber (10).

[0018] Furthermore, the exhaust port is arranged on the cylinder wall of the separator body (7) corresponding to the exhaust chamber (13), and two exhaust ports (61) and (62) are arranged on both sides of the cylinder wall, or one exhaust port is arranged on one side of the cylinder wall.

[0019] Furthermore, the porous plate (2) is an annular plate, the central portion of the annular plate is not perforated, and a plurality of circles of evenly arranged peripheral openings (21) are arranged around the edge of the porous plate to form concentric circles.

[0020] Furthermore, the peripheral opening (21) is a circular hole or a tooth-shaped hole.

[0021] Furthermore, the porous plate (2) is an annular perforated partition plate of a vertical cylindrical structure, and the vertical cylindrical structure is arranged between the top plate (1) and the cover plate (3), isolating the vertical cylindrical wall and the separator body (7) into an exhaust chamber (13), and isolating the area inside the vertical cylindrical wall into a buffer chamber (12).

[0022] Furthermore, the sizes of the openings on the cylinder wall of the annular perforated partition are uneven.

[0023] Therefore, the present invention designs a gas-liquid separator with a compact structure that can reduce the installation space; the gas-liquid two-phase fluid enters the separator body tangentially through the inlet at a relatively high speed, and gas-liquid separation is performed in the separation chamber. Due to its high density, the liquid phase is subjected to a large centrifugal force, and moves toward the wall of the separator body during the separation process, and forms a liquid film on the wall. Under the action of gravity, it flows to the lower part of the economizer, flows to the liquid collecting chamber through the small holes on the guide anti-rotation cover plate, and flows out from the side liquid outlet. The porous plate divides the space between the top plate and the cover plate into two parts, namely the buffer chamber and the exhaust chamber. The gas phase fluid enters the buffer chamber through the inner insert. Since the flow area of ​​the buffer chamber is increased, the gas flow rate is reduced, and the resistance loss of the airflow directly hitting the porous plate can be reduced. The gaseous fluid flowing out of the buffer chamber flows out through the exhaust port of the exhaust chamber.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The anti-rotation cover with skirt integrates three functions: the top sealing plate can prevent the air vortex from carrying the liquid in the liquid collecting chamber and causing the compressor to carry liquid; the openings in the skirt allow the liquid film to pass through, and the unperforated part of the skirt can hinder the rotation of the liquid film.

[0026] 2. The constricted liquid collecting chamber can reduce the space of the liquid collecting chamber as much as possible, and reduce the size of the economizer. More importantly, it can reduce the amount of refrigerant charged, which is of great significance to reducing costs for negative pressure refrigerant systems (such as R1233zd);

[0027] 3. Compared with the upper exhaust solution, the side exhaust solution can significantly reduce the height of the economizer, and an airflow organization structure is set in the exhaust chamber to avoid the flow velocity concentration in the inner insert tube, which causes the liquid to be carried into the downstream compressor by the high-speed airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a diagram of the explosion structure of the gas-liquid separator of the present invention.

[0029] Figure 2 It is a structural diagram (perspective view) of the gas-liquid separator of the present invention.

[0030] Figure 3 The present invention is a structural diagram of an implementation of the flow-guiding anti-rotation cover plate included in the gas-liquid separator of the present invention.

[0031] Figure 4 This is another structural diagram of the flow-guiding and anti-rotation cover plate included in the gas-liquid separator of the present invention.

[0032] Figure 5 This is a structural diagram of the porous plate included in the gas-liquid separator of the present invention.

[0033] Figure 6 This is another structural diagram of the liquid collecting chamber included in the gas-liquid separator of the present invention.

[0034] Figure 7 Another schematic diagram of the airflow organization method in the exhaust chamber of the gas-liquid separator of the present invention.

[0035] Attached Figure 1-7 The corresponding reference numerals are as follows:

[0036] Top plate 1, porous plate 2, cover plate 3, inner insert tube 4, flow guide anti-rotation cover plate 5, exhaust port (61 and 62), separator body 7, inlet 8, liquid outlet 9, separation chamber 10, liquid collecting chamber 11, buffer chamber 12 and exhaust chamber 13. DETAILED DESCRIPTION

[0037] The gas-liquid separator of the present invention is a vertical separator, which mainly relies on the difference in centrifugal force between the gas and liquid phases for separation. Figure 1-2 As shown, it mainly includes a cylindrical separator body 7, and a top plate 1, a porous plate 2, a cover plate 3, an inner insert tube 4, and a guide anti-rotation cover plate 5 which are sequentially stacked and combined with the separator body 7; the upper opening of the separator body 7 is closed by the top plate 1; exhaust ports 61 and 62 are arranged on both sides of the wall near the upper opening of the separator body 7, and the porous plate 2 is arranged below the lower edge of the exhaust ports 61 and 62 and is located in the separator body 7, and the separator space above the porous plate 2 corresponding to the two exhaust ports 61 and 62 is defined as an exhaust chamber 13. The cover plate 3 is arranged at intervals below the porous plate 2, and the separator space between the porous plate 2 and the cover plate 3 is defined as a buffer chamber 12. The cover plate 3 is an annular plate, and the lower plate surface is contacted with the inner insert tube 4; the guide anti-rotation cover plate 5 is arranged at intervals below the inner insert tube 4, and the guide anti-rotation cover plate 5 isolates the upper part of the separator body 7 as a separation chamber 10, and the lower part as a liquid collecting chamber 11. The bottom of the liquid collecting chamber 11 is provided with a liquid outlet 9.

[0038] The flow-guiding anti-rotation cover plate 5 is a truncated cone-shaped cylinder cover with an apron cover surface and a top plate surface. The apron cover surface is provided with through-hole-shaped small holes in the circumferential direction. The top plate surface 52 is circular and closed and has a diameter smaller than the bottom opening diameter. The top plate surface 52 must be sealed to form a barrier to prevent the vortex under the inner insert cylinder 4 from sucking the liquid in the liquid collection chamber 11. The through-hole-shaped small hole for the fluid to pass through can be a circular hole 51 (such as Figure 3 ), rectangular opening 53 (such as Figure 4) or other through-hole structures that can be thought of by those skilled in the art. The unperforated part of the apron cover surface of the flow-guiding anti-rotation cover plate 5 can achieve the obstruction of the rotating fluid, play a role in stabilizing the flow, and facilitate the collection of the liquid phase by the liquid collecting chamber.

[0039] The porous plate 2 is responsible for organizing the airflow. The central part is not perforated. A number of evenly arranged peripheral openings 21 form concentric circles around the edge of the porous plate. After the airflow hits the central part of the porous plate 2, it flows around to both sides and passes through the peripheral openings 21 ( Figure 5 ) flows out into the exhaust chamber 13 and then flows out from the exhaust ports 61 and 62 on both sides. The outer opening 21 can be replaced by a circular hole, a tooth-shaped hole, etc.

[0040] The liquid collecting chamber 11 is in a constricted form, which is convenient for collecting liquid and forming a liquid seal. In a strict definition, from the lower edge of the flow-guiding anti-rotation cover plate 5 downward, the diameter of the separator body 7 in the area where the liquid collecting chamber 11 is located presents a contracted structure relative to the separation chamber 10. Figure 1 The conical liquid collecting chamber 11 shown in FIG. 1 may also be Figure 6 The structure liquid collecting chamber 111 with a certain curvature shown in the figure is a contracted liquid collecting chamber that is beneficial to reducing the refrigerant filling amount and reducing costs.

[0041] The gas-liquid two-phase fluid enters the separator body 7 tangentially through the inlet 8 at a relatively high speed, and gas-liquid separation is carried out in the separation chamber 10. Due to its high density, the liquid phase is subjected to a large centrifugal force. During the separation process, it moves toward the wall of the separator body and forms a liquid film on the wall. Under the action of gravity, it flows to the lower part of the economizer, flows to the liquid collecting chamber 11 through the small holes 51 on the guide anti-rotation cover plate 5, and flows out from the side liquid outlet 9. The porous plate 2 divides the space between the top plate 1 and the cover plate 3 into two parts, namely the buffer chamber 12 and the exhaust chamber 13. The gas phase fluid enters the buffer chamber 12 through the inner insert 4. Since the flow area of ​​the buffer chamber 12 is increased, the gas flow rate is reduced, and the resistance loss of the airflow directly hitting the porous plate 2 can be reduced. The gaseous fluid flowing out of the buffer chamber flows out from the exhaust ports 61 and 62 on both sides through the exhaust chamber.

[0042] The airflow organization mode of the exhaust cavity 13 can also be as follows Figure 7 Presentation: The airflow outflowing from the inner insert tube 4 flows into the exhaust chamber 13 through the annular perforated partition plate 22. The annular perforated partition plate 22 is a vertical cylindrical structure, which is arranged between the top plate 1 and the cover plate 3. The openings on the cylinder wall of the annular perforated partition plate 22 are uneven in size, and the airflow is organized and then enters the exhaust ports (exhaust ports 61, 62) on both sides, and is discharged from the exhaust ports 61, 62 on both sides.

[0043] Furthermore, the exhaust port may not be double-sided exhaust like the exhaust ports 61 and 62 on both sides, and the hole structure on the porous plate may be changed to organize the airflow for single-sided exhaust.

Claims

1. A gas-liquid separator, comprising a cylindrical separator body (7) having an inlet (8), a liquid outlet (9) and an exhaust port, and a top plate (1) for sealing the top of the separator body (7); characterized in that: It also includes a porous plate (2), a cover plate (3), an inner insert cylinder (4), and a flow guide anti-rotation cover plate (5) which are combined with the separator body (7) in the cylinder below the top plate (1); The porous plate (2) is arranged between the top plate (1) and the cover plate (3), and divides the cylindrical space between the top plate (1) and the cover plate (3) into two parts, namely a buffer chamber (12) and an exhaust chamber (13); An inner insert cylinder (4) is arranged downward on the lower plate surface of the cover plate (3), and a flow guide anti-rotation cover plate (5) is arranged at intervals below the inner insert cylinder (4); The flow-guiding anti-rotation cover plate (5) is a truncated cone-shaped cylinder cover having an apron cover surface and a top plate surface, the apron cover surface is provided with through-hole-shaped small holes (51) in a circumferential arrangement, and the top plate surface (52) is a circular closed plate with a diameter smaller than the bottom opening diameter; the flow-guiding anti-rotation cover plate (5) divides the cylinder space below the cover plate (3) into two parts, namely a separation chamber (10) and a liquid collection chamber (11).

2. The gas-liquid separator according to claim 1, characterized in that: The lower edge of the apron cover surface of the flow-guiding anti-rotation cover plate (5) is connected to the inner wall of the separator body (7).

3. The gas-liquid separator according to claim 1, characterized in that: The through-hole-shaped small holes (51) are evenly arranged on the apron cover surface of the flow-guiding anti-rotation cover plate (5), and the projection of the through-hole-shaped small holes (51) on the central surface of the flow-guiding anti-rotation cover plate (5) is circular or rectangular.

4. The gas-liquid separator according to claim 1, characterized in that: The lower edge of the flow-guiding anti-rotation cover plate (5) moves downward, and the separator body (7) in the area where the liquid collecting chamber (11) is located is in a state of diameter contraction, and a liquid outlet (9) is provided on the side of the liquid collecting chamber (11).

5. The gas-liquid separator according to claim 1, characterized in that: The separator body (7) in the area where the liquid collecting chamber (11) is located presents a conical structure with a shrinking diameter or an arc structure that bends inwardly relative to the cylinder of the separation chamber (10).

6. The gas-liquid separator according to claim 1, characterized in that: The exhaust port is arranged on the cylinder wall of the separator body (7) corresponding to the exhaust chamber (13), and two exhaust ports (61) and (62) are arranged on both sides of the cylinder wall, or one exhaust port is arranged on one side of the cylinder wall.

7. The gas-liquid separator according to claim 1, characterized in that: The porous plate (2) is an annular plate, the central portion of which is not perforated, and a plurality of evenly arranged peripheral openings (21) are arranged around the edge of the porous plate to form concentric circles.

8. The gas-liquid separator according to claim 7, characterized in that: The peripheral opening (21) is a circular hole or a tooth-shaped hole.

9. The gas-liquid separator according to claim 1, characterized in that: The porous plate (2) is an annular perforated partition plate of a vertical cylindrical structure, the vertical cylindrical structure being arranged between the top plate (1) and the cover plate (3), isolating the vertical cylindrical wall and the separator body (7) into an exhaust chamber (13), and isolating the area inside the vertical cylindrical wall into a buffer chamber (12).

10. The gas-liquid separator according to claim 9, characterized in that: The sizes of the holes on the cylinder wall of the annular perforated partition are uneven.

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