Flooded evaporator

Abstract

The present application belongs to the technical field of heat exchanger. Disclosed is a flooded evaporator, comprising: a shell, the bottom of which is provided with a liquid inlet, the top of which is provided with a gas outlet, and the inner cavity of which is provided with a water tube group, and the shell is filled with refrigerant which immerses the water tube group; a separation tank which is arranged outside the refrigerant in the shell, and the separation tank is internally arranged with a first chamber and a second chamber from top to bottom, the tail gas outlet end of the first chamber is communicated with the head gas inlet end of the second chamber, the gas outlet end of the second chamber is communicated with the gas outlet, and the end of the separation tank which is far away from the water tube group is provided with an air inlet part which is communicated with the first chamber. The present application can change the position of the air inlet part in the first chamber according to the suction force of the gas outlet, when the suction force increases, the flow path of gas-liquid in the separation tank increases, and the number of gas-liquid separators which are passed through also increases, thereby reducing the influence of the increase of the suction force on the gas dryness which is sent into the compressor.

Description

Technical Field

[0001] This invention belongs to the field of heat exchanger technology, and particularly relates to a flooded evaporator. Background Technology

[0002] In a flooded evaporator, cold water flows through the heat exchange tubes, and the refrigerant completely submerges the heat exchange tubes. After absorbing heat, the gas evaporates outside the heat exchange tubes. After gas-liquid separation, the gas is sent into the compressor, and the liquid flows back into the shell side. Flooded evaporators are widely used because of their simple structure and stable operation.

[0003] However, during the actual operation of the unit system, the suction force of the compressor will change due to the influence of actual operating conditions. When the suction force of the compressor increases, the gas-liquid flow rate in the flooded evaporator will be accelerated. Due to the increase in flow rate, the gas-liquid separation structure is affected in separating gas and liquid, which affects the dryness of the gas sent into the compressor, thereby reducing the heat exchange performance.

[0004] Therefore, a flooded evaporator is provided to solve the above problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes a flooded evaporator that can change the position of the inlet component in the first chamber according to the suction force at the outlet. When the suction force increases, the flow path of gas and liquid in the separation chamber lengthens, and the number of gas-liquid separators passed through increases, thereby reducing the impact on the dryness of the gas sent into the compressor due to the increased suction force.

[0006] To achieve the above objectives, the present invention provides a flooded evaporator, comprising:

[0007] The housing has a liquid inlet at the bottom and an air outlet at the top. The inner cavity is equipped with a water pipe assembly, and the housing is filled with refrigerant that submerges the water pipe assembly.

[0008] A separation box is disposed outside the refrigerant inside the housing. The separation box has a first chamber and a second chamber arranged vertically inside the housing. The air outlet at the rear of the first chamber is connected to the air inlet at the front of the second chamber. The air outlet at the second chamber is connected to the air outlet. An air inlet is provided at the end of the separation box away from the water pipe assembly. The air inlet is connected to the first chamber.

[0009] The driving component has a plug end that blocks the flow of gas and liquid. The plug end is disposed in the expansion section of the second chamber. The plug end is connected to the air inlet component. The plug end is used to drive the air inlet end of the air inlet component to move in the first chamber.

[0010] Multiple gas-liquid separators are arranged in the first chamber and the second chamber along the gas-liquid movement direction.

[0011] Furthermore, the separation box includes: a box body, with an opening on the end face away from the water pipe assembly, and multiple support rods fixed to the outer wall of the box body, with the other end of the support rods fixed to the inner wall of the shell;

[0012] A partition plate is fixed to the inner wall of the box, and the partition plate separates the box into a first chamber and a second chamber arranged vertically. The end of the first chamber away from the air outlet is connected to the second chamber. An air outlet pipe is fixed through the air outlet and the air inlet end of the air outlet pipe extends into the second chamber.

[0013] Furthermore, the air intake component includes: a pair of positioning plates fixed inside the movable opening, with a gap provided between the two positioning plates;

[0014] A movable plate is disposed between the two positioning plates and connected to the driving component. Both ends of the movable plate extend into the sliding grooves opened at the ends of the two positioning plates. The movable plate is slidably connected to the positioning plates. The movable plate and the positioning plates cooperate to block the movable port. An air inlet is opened on the movable plate.

[0015] Furthermore, the driving component includes: a slide rod disposed in the second chamber, one end of the slide rod being fixed to the inner wall of the box, the other end of the slide rod extending in the opposite direction to the gas-liquid flow, and the plug end sliding through and sliding on the slide rod;

[0016] A compression spring is sleeved on the slide rod. The compression spring is located between the end of the plug and the inner wall of the box. The two ends of the compression spring are respectively fixed to the end of the plug and the inner wall of the box.

[0017] At least one U-shaped drive frame, one end of which is fixed to the end of the plug, and the other end of which passes through the side wall of the housing where the slide rod is fixed. The other end of the U-shaped drive frame is fixed to the movable plate. Further, the expansion section includes: a first inclined groove, which is formed on the end face of the partition plate away from the first chamber. The groove depth of the first inclined groove away from the air outlet pipe is less than the groove depth of the first inclined groove close to the air outlet pipe.

[0018] The second inclined groove is formed on the inner wall of the bottom end of the box body. The groove depth of the second inclined groove away from the air outlet pipe is less than the groove depth of the second inclined groove close to the air outlet pipe. The first inclined groove and the second inclined groove are correspondingly matched to form the expansion section.

[0019] Furthermore, the plug end is a rubber sealing plate disposed between the first inclined groove and the second inclined groove.

[0020] Furthermore, the gas-liquid separator includes: a separation box with an air passage in the middle;

[0021] A separation plate is fixed inside the gas passage, and the separation plate has multiple ports for gas and liquid to pass through.

[0022] A separating fan blade is disposed on the side of the separating plate near the inlet liquid end of the air passage, and the separating fan blade is rotatably connected to the separating plate.

[0023] Furthermore, it also includes: a liquid collection channel, fixed on the side of the separation box near the gas inlet liquid end of the gas passage, the liquid collection channel being disposed below the gas passage and communicating with the gas passage;

[0024] A liquid guide tube is connected to the outlet end of the liquid collection channel, and the outlet end of the liquid guide tube passes through the box and communicates with the inside of the shell.

[0025] Furthermore, the side of the separation box near the air inlet liquid end of the air passage is a V-shaped end face, and the liquid collection channel is fixed at the bottom of the V-shaped end face.

[0026] Furthermore, the water pipe assembly includes:

[0027] The water inlet pipe penetrates the housing;

[0028] A water outlet pipe extends through the housing, and the water inlet end of the water outlet pipe is connected to the water outlet end of the water inlet pipe.

[0029] Compared with the prior art, the present invention has the following advantages and technical effects:

[0030] When the suction force at the outlet increases, the plug end moves in the expansion section, which drives the inlet component to move in the first chamber, thereby increasing the flow path of gas and liquid. The number of gas and liquid passing through the gas-liquid separator increases, ensuring the separation effect of gas and liquid, and thus ensuring the dryness of the gas discharged from the outlet. Attached Figure Description

[0031] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0032] Figure 1 This is a cross-sectional view of a flooded evaporator;

[0033] Figure 2 A three-dimensional view of a flooded evaporator;

[0034] Figure 3 This is a cross-sectional view of the separation box;

[0035] Figure 4 for Figure 3 The front view;

[0036] Figure 5 Exploded view of the separation box;

[0037] Figure 6 This is a three-dimensional view of a gas-liquid separator;

[0038] Figure 7 This is a cross-sectional view of a gas-liquid separator;

[0039] Among them, 1-shell, 2-liquid inlet, 3-air outlet, 4-separation box, 401-box body, 402-movable port, 403-support rod, 404-partition plate, 5-first chamber, 6-second chamber, 7-expansion section, 701-first inclined groove, 702-second inclined groove, 8-gas-liquid separator, 801-separation box, 802-air passage, 803-separation plate, 804-separation fan blade, 805-V-shaped end face, 806-passage, 9-air outlet pipe, 10-positioning plate, 11-movable plate, 12-slide groove, 13-air inlet, 14-slide rod, 15-compression spring, 16-U-shaped drive frame, 17-rubber sealing plate, 18-liquid collection channel, 19-liquid guide pipe, 20-water inlet pipe, 21-water outlet pipe. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Reference Figures 1-7 This invention provides a flooded evaporator, comprising: a shell 1, a liquid inlet 2 at the bottom, an outlet 3 at the top, and a water pipe assembly inside the shell 1. The shell 1 is filled with refrigerant that submerges the water pipe assembly. The shell 1 is used to contain the refrigerant, and the water pipe assembly is used for water passage. Refrigerant is introduced into the shell 1 through the liquid inlet 2. After the refrigerant evaporates, it undergoes gas-liquid separation and is discharged into the compressor through the outlet 3. The suction force of the compressor changes according to the actual operating conditions. When the suction force increases, the suction force at the outlet 3 also increases.

[0043] Separator 4 is located outside the refrigerant inside the housing 1. Separator 4 has a first chamber 5 and a second chamber 6 arranged vertically inside. The exhaust end of the first chamber 5 is connected to the inlet end of the second chamber 6. The exhaust end of the second chamber 6 is connected to the outlet 3. An air inlet is provided at the end of the separator 4 away from the water pipe assembly. The air inlet is connected to the first chamber 5. A drive unit has a plug end that blocks the flow of gas and liquid. The plug end is located in the expansion section 7 of the second chamber 6. The plug end is connected to the air inlet and is used to drive the air inlet end of the air inlet to move in the first chamber 5. Multiple gas-liquid separators 8 are arranged in the first chamber 5 and the second chamber 6 along the direction of gas-liquid movement.

[0044] Specifically, the outlet 3 is used to extract gas from the second chamber 6. A plug is installed in the second chamber 6 to partially block the expansion section 7. When the suction force of the outlet 3 increases, in order to meet the suction of the outlet 3, the plug moves from the expansion section 7 toward the outlet 3 so that more gas can enter the outlet 3 through the plug. When the plug moves, it drives the inlet to move on the first chamber 5, so that the inlet of the first chamber 5 moves toward the outlet 3. After the gas and liquid enter the first chamber 5, their movement path increases. At the same time, multiple gas-liquid separators 8 are arranged in the first chamber 5 and the second chamber 6, so that the number of gas and liquid passing through the gas-liquid separators 8 increases, thereby achieving gas-liquid separation.

[0045] In this process, after the refrigerant evaporates, it enters the first chamber 5 from the top of the separator 4, moves within the first chamber 5 and enters the second chamber 6, and then enters the outlet 3 from the second chamber 6. In the above process, gas-liquid separation is achieved through multiple gas-liquid separators 8.

[0046] Further optimize the plan, referring to Figure 3 , Figure 4 , Figure 5 The separation box 4 includes: a box body 401, with an opening 402 on the end face away from the water pipe assembly, and multiple support rods 403 fixed on the outer wall of the box body 401. The other end of the support rods 403 is fixed to the inner wall of the shell 1. The box body 401 is fixed inside the shell 1 by the support rods 403, and the box body 401 is located outside the refrigerant inside the shell 1.

[0047] A partition plate 404 is fixed to the inner wall of the box 401. The partition plate 404 divides the box 401 into a first chamber 5 and a second chamber 6 arranged vertically. The end of the first chamber 5 away from the air outlet 3 is connected to the second chamber 6. An air outlet pipe 9 is fixed through the air outlet 3 and the air inlet end of the air outlet pipe 9 extends into the second chamber 6.

[0048] Specifically, the partition plate 404 divides the inner cavity of the housing 401 to form a first chamber 5 and a second chamber 6. One end of the exhaust pipe 9 is connected to the compressor, and the other end of the exhaust pipe 9 is connected to the second chamber 6.

[0049] Further optimize the plan, referring to Figure 3 , Figure 4 , Figure 5 The air intake component includes: a pair of positioning plates 10, fixed in the movable opening 402, with a gap between the two positioning plates 10; a movable plate 11, disposed between the two positioning plates 10 and connected to the driving component, with both ends of the movable plate 11 extending into the sliding grooves 12 opened at the ends of the two positioning plates 10 respectively, the movable plate 11 and the positioning plates 10 being slidably connected, the movable plate 11 and the positioning plates 10 cooperating to block the movable opening 402, and an air intake 13 being opened on the movable plate 11.

[0050] Specifically, the two positioning plates 10 are used to block the movable port 402 and also serve as a support structure for the movable plate 11. Driven by the plug end, the movable plate 11 can move on the positioning plates 10. When the movable plate 11 moves closer to the outlet pipe 9, the inlet 13 moves accordingly, increasing the movement path of gas and liquid in the first chamber 5 and increasing the number of gas-liquid separators 8 that need to be passed through. When the movable plate 11 moves away from the outlet pipe 9, the inlet 13 moves accordingly, decreasing the movement path of gas and liquid in the first chamber 5 and reducing the number of gas-liquid separators 8 that need to be passed through. With this structure, the dryness of the output gas can be guaranteed.

[0051] Further optimize the plan, referring to Figure 3 , Figure 4 , Figure 5 The driving component includes: a slide rod 14, which is disposed in the second chamber 6. One end of the slide rod 14 is fixed to the inner wall of the housing 401, and the other end of the slide rod 14 extends in the opposite direction of gas-liquid flow. The end of the plug slides on the slide rod 14. A compression spring 15 is sleeved on the slide rod 14. The compression spring 15 is located between the end of the plug and the inner wall of the housing 401, and both ends of the compression spring 15 are fixed to the end of the plug and the inner wall of the housing 401, respectively. At least one U-shaped drive frame 16 is fixed at one end to the end of the plug and the other end passes through the side wall of the housing 401 where the slide rod 14 is fixed. The other end of the U-shaped drive frame 16 is fixed to the movable plate 11.

[0052] Specifically, the slide bar 14 serves as a support structure for the plug end. When the plug end moves towards the air outlet pipe 9, the compression spring 15 is compressed. The plug end, through the U-shaped drive frame 16, drives the movable plate 11 to move synchronously and in the same direction, changing the air intake position of the first chamber 5. When the suction force of the air outlet pipe 9 decreases, the compression spring 15 returns to its original position by a certain distance, ensuring that there is a gap between the plug end and the inner wall of the second chamber 6 for gas to pass through.

[0053] Further optimize the plan, referring to Figure 3 , Figure 4 , Figure 5The expansion section 7 includes: a first inclined groove 701, which is formed on the end face of the partition plate 404 away from the first chamber 5, and the groove depth of the first inclined groove 701 away from the air outlet pipe 9 is less than the groove depth of the first inclined groove 701 near the air outlet pipe 9; a second inclined groove 702, which is formed on the inner wall of the bottom end of the box body 401, and the groove depth of the second inclined groove 702 away from the air outlet pipe 9 is less than the groove depth of the second inclined groove 702 near the air outlet pipe 9; the first inclined groove 701 and the second inclined groove 702 cooperate to form the expansion section 7.

[0054] Specifically, the location in the second chamber 6 used to accommodate the plug end is an expansion structure, meaning that the cross-sectional area of ​​the expansion section 7 near the outlet pipe 9 is larger than the cross-sectional area of ​​the expansion section 7 away from the outlet pipe 9. With this structure, when the plug end moves towards the outlet pipe 9, the gap between the plug end and the inner wall of the second chamber 6 increases, allowing more gas to pass through.

[0055] Further optimize the plan, referring to Figure 3 , Figure 4 , Figure 5 The plug end is a rubber sealing plate 17 disposed between the first inclined groove 701 and the second inclined groove 702. The rubber sealing plate 17 is disposed in the second chamber 6 and moves and changes position in the second chamber 6 under the action of external suction force.

[0056] Further optimize the plan, referring to Figure 6 , Figure 7 The gas-liquid separator 8 includes a separation box 801 with an air passage 802 in the middle. Multiple separation boxes 801 are arranged. The separation boxes 801 are fixed in the first chamber 5 and the second chamber 6. At the same time, the separation boxes seal the first chamber 5 and the second chamber 6. The air passage 802 is used to allow gas and liquid to pass through, and gas-liquid separation is achieved during the gas-liquid passage.

[0057] In the first chamber 5, since the position of the air inlet 13 on the movable plate 11 can be changed, the number of gas and liquid passing through the separation box 801 in the first chamber 5 can be changed according to the suction force of the air outlet pipe 9. That is, the greater the suction force of the air outlet pipe 9, the more gas and liquid pass through the separation box 801, thereby ensuring the gas-liquid separation effect.

[0058] A separation plate 803 is fixed inside the gas passage 802, and multiple ports 806 for gas and liquid to pass through are provided on the separation plate 803. The multiple ports 806 are axially opened on the end face of the separation plate 803. When gas and liquid pass through the separation plate 803, the liquid in the gas and liquid contacts the separation plate 803 and gas-liquid separation is achieved.

[0059] The separating fan blade 804 is located on the side of the separating plate 803 near the gas-liquid inlet end of the gas passage 802, and is rotatably connected to the separating plate 803. After the gas and liquid enter the gas passage 802, the gas and liquid drive the separating fan blade 804 to rotate relative to the separating plate 803, and the liquid adhering to the separating fan blade 804 is thrown to the inner wall of the gas passage 802 by the separating fan blade 804.

[0060] Further optimize the plan, referring to Figure 6 , Figure 7 It also includes: a liquid collection channel 18, which is fixed on the side of the separation box 801 near the air inlet liquid end of the air passage 802. The liquid collection channel 18 is located below the air passage 802. The liquid collection channel 18 is connected to the air passage 802 by a liquid guide pipe 19, which is connected to the liquid outlet end of the liquid collection channel 18. The liquid outlet end of the liquid guide pipe 19 passes through the box body 401 and is connected to the inside of the shell 1.

[0061] Specifically, the liquid collection channel 18 is used to collect the liquid collected by the separation plate 803 and the separation fan blade 804, and to send the liquid back into the housing 1 through the liquid guide pipe 19.

[0062] Furthermore, the bottom inner wall of the air passage 802 is inclined, and the side near the liquid collection channel 18 is lower in height, so as to guide the liquid collected in the air passage 802.

[0063] Further optimize the plan, referring to Figure 6 , Figure 7 The side of the separator 801 near the air inlet liquid end of the air passage 802 is a V-shaped end face 805, and the liquid collection channel 18 is fixed at the bottom of the V-shaped end face 805.

[0064] Specifically, by setting the end face of the separation box 801 that contacts the gas and liquid to a V-shape, the gas and liquid can be impacted on the V-shaped end face 805, thus achieving preliminary separation of gas and liquid.

[0065] The scheme is further optimized. The water pipe assembly includes: an inlet pipe 20 that penetrates the housing 1; and an outlet pipe 21 that penetrates the housing 1. The inlet end of the outlet pipe 21 is connected to the outlet end of the inlet pipe 20.

[0066] Specifically, when the compressor increases its suction force, the outlet pipe 9 increases its suction force to draw gas from the second chamber 6. The rubber sealing plate 17 in the second chamber 6 moves toward the outlet pipe 9 so that more gas can enter the outlet pipe 9 through the gap between the rubber sealing plate 17 and the second chamber 6. When the rubber sealing plate 17 moves, the rubber sealing plate 17 drives the movable plate 11 to move on the positioning plate 10 through the U-shaped drive frame 16, changing the position of the air inlet 13 in the first chamber 5. After the gas and liquid enter the first chamber 5 through the air inlet 13, their movement path increases. The gas and liquid are separated by passing through the V-shaped end face 805 of the separation box 801, the separation fan blade 804, and the separation plate 803. The separated gas is sent into the compressor through the outlet pipe 9, and the separated liquid is sent into the housing 1 through the liquid guide pipe 19.

[0067] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A flooded evaporator, characterized in that: include: The housing (1) has a liquid inlet (2) at the bottom and an air outlet (3) at the top. The inner cavity is equipped with a water pipe assembly, and the housing (1) is filled with refrigerant that submerges the water pipe assembly. A separation box (4) is located in the upper part of the housing (1). The separation box (4) has a first chamber (5) and a second chamber (6) arranged vertically inside it. The air outlet at the tail end of the first chamber (5) is connected to the air inlet at the head end of the second chamber (6). The air outlet at the second chamber (6) is connected to the air outlet (3). An air inlet is provided at the end of the separation box (4) away from the water pipe assembly. The air inlet is connected to the first chamber (5). The driving component has a plug end that blocks the flow of gas and liquid. The plug end is disposed in the expansion section (7) of the second chamber (6). The plug end is connected to the air inlet component. The plug end is used to drive the air inlet end of the air inlet component to move in the first chamber (5). Multiple gas-liquid separators (8) are arranged in the first chamber (5) and the second chamber (6) along the gas-liquid movement direction.

2. The flooded evaporator according to claim 1, characterized in that: The separation box (4) includes: a box body (401), with an opening (402) on the end face away from the water pipe group, and a plurality of support rods (403) fixed on the outer wall of the box body (401), with the other end of the support rods (403) fixed to the inner wall of the shell (1); A partition plate (404) is fixed to the inner wall of the box (401). The partition plate (404) separates the first chamber (5) and the second chamber (6) arranged vertically inside the box (401). The end of the first chamber (5) away from the air outlet (3) is connected to the second chamber (6). An air outlet pipe (9) is fixedly installed on the air outlet (3). The air inlet end of the air outlet pipe (9) extends into the second chamber (6).

3. The flooded evaporator according to claim 2, characterized in that: The air intake component includes: a pair of positioning plates (10) fixed inside the movable port (402), with a gap between the two positioning plates (10); A movable plate (11) is disposed between the two positioning plates (10) and connected to the driving component. Both ends of the movable plate (11) extend into the sliding grooves (12) opened at the ends of the two positioning plates (10). The movable plate (11) is slidably connected to the positioning plates (10). The movable plate (11) and the positioning plates (10) cooperate to block the movable port (402). An air inlet (13) is opened on the movable plate (11).

4. The flooded evaporator according to claim 3, characterized in that: The driving component includes: a slide rod (14), which is disposed in the second chamber (6). One end of the slide rod (14) is fixed to the inner wall of the box body (401), and the other end of the slide rod (14) extends in the opposite direction of gas-liquid flow. The plug end slides through the slide rod (14). A compression spring (15) is sleeved on the slide rod (14). The compression spring (15) is located between the end of the plug and the inner wall of the box (401). The two ends of the compression spring (15) are fixed to the end of the plug and the inner wall of the box (401) respectively. At least one U-shaped drive frame (16) is fixed at one end to the end of the plug, and the other end passes through the box (401) and is fixed to the side wall of the slide rod (14). The other end of the U-shaped drive frame (16) is fixed to the movable plate (11).

5. The flooded evaporator according to claim 2, characterized in that: The expansion section (7) includes: a first inclined groove (701) formed on the end face of the partition plate (404) away from the first chamber (5), wherein the groove depth of the first inclined groove (701) away from the air outlet pipe (9) is less than the groove depth of the first inclined groove (701) close to the air outlet pipe (9); The second inclined groove (702) is formed on the inner wall of the bottom end of the box (401). The groove depth of the second inclined groove (702) away from the air outlet pipe (9) is less than the groove depth of the second inclined groove (702) close to the air outlet pipe (9). The first inclined groove (701) and the second inclined groove (702) cooperate to form the expansion section (7).

6. The flooded evaporator according to claim 5, characterized in that: The plug end is a rubber sealing plate (17) disposed between the first inclined groove (701) and the second inclined groove (702).

7. The flooded evaporator according to claim 2, characterized in that: The gas-liquid separator (8) includes: a separation box (801) with an air passage (802) in the middle; A separation plate (803) is fixed inside the air passage (802), and the separation plate (803) is provided with a plurality of air-liquid passages (806); A separating fan blade (804) is disposed on the side of the separating plate (803) near the air inlet liquid end of the air passage (802), and the separating fan blade (804) is rotatably connected to the separating plate (803).

8. The flooded evaporator according to claim 7, characterized in that: Also includes: A liquid collection channel (18) is fixed on the side of the separation box (801) near the gas inlet liquid end of the gas passage (802). The liquid collection channel (18) is located below the gas passage (802) and is connected to the gas passage (802). A liquid guide pipe (19) is connected to the liquid outlet end of the liquid collection channel (18), and the liquid outlet end of the liquid guide pipe (19) passes through the box body (401) and communicates with the shell (1).

9. The flooded evaporator according to claim 8, characterized in that: The separation box (801) has a V-shaped end face (805) on the side near the air inlet liquid end of the air passage (802), and the liquid collection channel (18) is fixed at the bottom of the V-shaped end face (805).

10. The flooded evaporator according to claim 1, characterized in that: The water pipe assembly includes: A water inlet pipe (20) penetrates the housing (1); The water outlet pipe (21) penetrates the housing (1), and the water inlet end of the water outlet pipe (21) is connected to the water outlet end of the water inlet pipe (20).

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