CN117088458A - Energy-saving chilled water recovery system and method - Google Patents

Abstract

The invention discloses an energy-saving chilled water recovery system and method, which includes a filter box, a water collection tank, a water pump, a spray tower and a purification box. A chilled water inlet pipe is connected to one side of the top of the filter box. The chilled water A first valve is fixedly installed on the water inlet pipe. The bottom side of the filter box and the top side of the water collecting tank are connected through a U-shaped pipe. A second valve is fixedly installed on the U-shaped pipe. The filter A first filter screen is provided inside the box, a backwash water pipe is connected to the top side of the filter box, a third valve is fixedly installed on the backwash water pipe, and a third valve is connected to the bottom side of the filter box. One outlet pipe. By arranging the filter box and the first filter screen, the present invention can filter the recovered frozen water, thereby purifying the frozen water, and uses the water collection box to collect the purified frozen water to facilitate reuse.

Description

Energy-saving chilled water recovery system and method

Technical field

The invention relates to the field of chilled water recovery, and in particular to an energy-saving chilled water recovery system and method.

Background technique

Chilled water passes the cooling capacity produced by the refrigeration unit through pipes. The water is pumped into the room and then exchanged to the space by the room's fan coil. Simply put, chilled water is a means of transportation that transfers cold energy from the refrigeration unit to the room where it is used.

Referring to the existing Chinese patent with publication number CN210339037U, it discloses a water storage tank that facilitates the recovery of chilled water, including a tank body, an air inlet pipe, an air inlet plate and a return pipe; the tank body is provided with ventilation holes, and is provided with a device for sealing all The cover body of the breathable hole; the air inlet pipe is used to connect to the air source and communicate with the tank body; the air inlet plate is arranged in the tank body and is provided with an air outlet connected with the air inlet pipe for supplying air to the tank body. Gas is injected into the tank; a return pipe is located at the bottom of the tank and communicates with the inside of the tank. It is also equipped with a water valve and is used to connect recovery equipment.

The above-mentioned water storage tank that facilitates the recovery of chilled water seals the ventilation hole with the cover, and vents gas into the tank through the air inlet pipe and the air inlet plate, thereby increasing the pressure in the tank. After opening the water valve, the water in the tank is released. It is discharged into the recovery equipment to facilitate recycling, thereby reducing the water accumulated in the tank, thereby reducing the waste of chilled water. However, the existing energy-saving chilled water recycling systems and methods still have some shortcomings, such as: 1. During the chilled water recycling, the chilled water is not filtered and purified, which reduces the cleanliness of the chilled water when it is reused, thereby reducing the cost of freezing. The extensiveness of water reuse; 2. After using the chilled water, the used chilled water is not collected again, thus reducing the energy utilization efficiency. For this purpose, an energy-saving chilled water recovery system and method are designed.

Contents of the invention

In view of the problems mentioned in the background art, the purpose of the present invention is to provide an energy-saving chilled water recovery system and method to solve the problems mentioned in the background art.

The above technical objectives of the present invention are achieved through the following technical solutions:

An energy-saving chilled water recovery system includes a filter box, a water collection tank, a water pump, a spray tower and a purification box. A chilled water inlet pipe is connected to one side of the top of the filter box, and a chilled water inlet pipe is fixedly installed on the chilled water inlet pipe. The first valve is connected to the bottom side of the filter box and the top side of the water collection box through a U-shaped pipe. A second valve is fixedly installed on the U-shaped pipe. A third valve is provided inside the filter box. A filter screen, a backwash water pipe is connected to the top side of the filter box, a third valve is fixedly installed on the backwash water pipe, a first water outlet pipe is connected to the bottom side of the filter box, and the A fourth valve is fixedly installed on the first outlet pipe;

A first water pipe is connected between the bottom of the water collection tank and the input end of the water pump. A fifth valve is fixed on the first water pipe. A spray pipe is fixed on the top of the spray tower. The output end of the water pump is connected to one end of the spray pipe through a second water pipe. A second filter is provided inside the spray tower, and a discharge hole is provided on one side of the bottom of the second filter. outlet, an opening and closing unloading assembly is provided outside the discharge port, a drainage pipe is connected to the bottom of the spray tower, and the other end of the drainage pipe is connected to the top of the purification box. The purification A first adsorption layer is provided inside the box, and a second water outlet pipe is connected to the bottom of the purification box.

By adopting the above technical solution and by setting up the filter box and the first filter screen, the recovered chilled water can be filtered, thereby purifying the chilled water, and the water collection tank can be used to collect the purified chilled water to facilitate repeated use. Utilization; Through the second filter provided, the chilled water used in the spray tower can be filtered, and the discharged water can be purified through the purification box, thereby facilitating the reuse of the purified water and further improving the efficiency of water resources. usage efficiency.

Preferably, the first filter screen is slidably arranged inside the filter box, a first rubber sealing gasket is provided between the first filter screen and the filter box, and the top of the first filter screen It is connected to the filter box through detachable components.

By adopting the above technical solution, the sealing performance of the connection between the first filter screen and the filter box can be increased and water leakage can be prevented.

Preferably, the detachable component includes a cover plate, a slot, a bump, a fixing block and a fastening bolt. The cover plate is arranged on the top of the filter box, and the slot is opened on the cover plate. On the inner surface, the bump is fixedly arranged on the top of the first filter, the bump is clamped in the slot, the fixing block is welded to the outer surface of the cover plate, and the fixing block It is connected to the top of the filter box through the fastening bolts.

By adopting the above technical solution, the cover plate is removed from the top of the filter box by unscrewing the fastening bolts, and the first filter screen is moved by pulling the bump, so that the first filter screen can be disassembled to facilitate the removal of the first filter screen. Filter to clean.

Preferably, four groups of the fixed blocks and the fastening bolts are provided correspondingly, and the four groups of the fixed blocks and the four groups of the fastening bolts are symmetrically arranged on both sides of the cover plate.

By adopting the above technical solution, the stability of the cover plate installation can be increased, thereby improving the installation stability of the first filter screen.

Preferably, an air inlet pipe is connected to one side of the spray tower, an air outlet pipe is connected to the top of the spray tower, and a second adsorption layer is provided inside the top of the spray tower.

By adopting the above technical solution, air intake and outlet are facilitated, and the exhausted gas is purified.

Preferably, the first adsorption layer and the second adsorption layer are both configured as activated carbon adsorption layers.

By adopting the above technical solution, it is convenient to adsorb impurities in gas and water and increase the purification effect.

Preferably, the second filter screen is tilted, and the tilt angle is 30-60°.

By adopting the above technical solution, it is possible to prevent the discharge of spray water from being affected and facilitate the treatment of filtered impurities.

Preferably, an inclined guide plate is provided inside the bottom of the spray tower, and the bottom of the inclined guide plate is provided at the drainage pipe.

By adopting the above technical solutions, the adequacy of water discharge is increased.

Preferably, the opening and closing blanking assembly includes two sets of servo electric cylinders, connecting plates, push-pull rods, baffles and second rubber sealing gaskets, and the two sets of servo electric cylinders are fixedly installed on the outside of the spray tower. surface, one end of the connecting plate is fixedly connected to the output end of the servo electric cylinder, the second rubber sealing gasket is fixedly arranged on the outer surface of the baffle, and the baffle is sealed and plugged into the discharging At the mouth, one end of the push-pull rod is welded to the outer surface of the baffle, and the other end of the push-pull rod is welded to the inner surface of the connecting plate.

By adopting the above technical solution, the servo electric cylinder drives the connecting plate to move, the connecting plate drives the push-pull rod to move, and the push-pull rod drives the baffle to move, so that the baffle moves away from the discharge port, opens the discharge port, and controls the second filter screen. Treat the impurities at the place.

An energy-saving chilled water recycling method includes the following steps:

S1. Close the third valve and the fourth valve, open the first valve and the second valve, let the chilled water enter the filter box through the chilled water inlet pipe, use the filter to filter the chilled water and remove impurities, and the filtered chilled water passes through The U-shaped pipe enters the water collection tank;

S2. Open the fifth valve, extract the chilled water inside the water collecting tank through the water pump, transport it to the spray pipe through the first water pipe and the second water pipe, and spray the gas inside the spray tower. After the gas is purified through the first adsorption layer, it is discharged from the gas outlet pipe;

S3. The water after spraying is filtered through the second filter. The filtered water enters the purification box through the outlet pipe. The first adsorption layer is used to purify the water. The purified water is discharged through the second outlet pipe. and collected for recycling;

S4. Clean the first filter: open the third valve and the fourth valve, close the first valve and the second valve, send high-pressure water into the backwash water pipe, backwash the first filter, and remove the filtered water. Impurities are discharged from the first water outlet pipe, and the first filter screen is regularly disassembled and maintained through the provided detachable components to maintain the filtering effect of the first filter screen;

S5. Spray tower impurity removal: The servo electric cylinder drives the connecting plate to move, the connecting plate drives the push-pull rod to move, and the push-pull rod drives the baffle to move, so that the baffle moves away from the discharge port, opens the discharge port, and controls the second The impurities at the filter are processed;

S6. After cleaning is completed, reset the structure and continue recycling of chilled water.

To sum up, the present invention mainly has the following beneficial effects:

First, by arranging a filter box and a first filter screen, the present invention can filter the recovered frozen water, thereby purifying the frozen water, and use the water collection box to collect the purified frozen water to facilitate reuse. ;

Second, the present invention can backwash the first filter by arranging a backwash water pipe and a first outlet pipe, thereby facilitating the discharge of impurities filtered by the first filter and increasing the filtration effect;

Third, the present invention can filter the chilled water used in the spray tower through the second filter screen, and purify the discharged water through the purification box, thereby facilitating the reuse of the purified water and further improving the efficiency. Water resource utilization efficiency.

Description of the drawings

Figure 1 is one of the structural schematic diagrams of the recycling system of the present invention;

Figure 2 is the second structural cross-sectional view of the recovery system of the present invention;

Figure 3 is a structural cross-sectional view of the filter box part of the present invention;

Figure 4 is an enlarged view of point A in Figure 3;

Figure 5 is a structural cross-sectional view of the spray tower and purification box part of the present invention;

Figure 6 is an enlarged view of B in Figure 5.

Reference signs: 1. Filter box; 2. Water collection tank; 3. Water pump; 4. Spray tower; 5. Purification box; 6. Chilled water inlet pipe; 7. First valve; 8. U-shaped pipe; 9. The second valve; 10. The first filter; 11. Backwash water pipe; 12. The third valve; 13. The first outlet pipe; 14. The fourth valve; 15. The first water pipe; 16. The fifth valve; 17 , spray pipe; 18. Second water pipe; 19. Second filter; 20. Discharge port; 21. Opening and closing blanking assembly; 211. Servo electric cylinder; 212. Connecting plate; 213. Push-pull rod; 214 , baffle; 215, second rubber seal; 22, drainage pipe; 23, first adsorption layer; 24, second outlet pipe; 25, first rubber seal; 26, detachable components; 261, cover; 262. Slot; 263. Bump; 264. Fixing block; 265. Fastening bolt; 27. Air inlet pipe; 28. Air outlet pipe; 29. Second adsorption layer; 30. Inclined deflector.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Example 1

Referring to Figures 1 to 6, an energy-saving chilled water recovery system includes a filter box 1, a water collection tank 2, a water pump 3, a spray tower 4 and a purification box 5. The top side of the filter box 1 is connected with chilled water. Water inlet pipe 6. A first valve 7 is fixedly installed on the chilled water inlet pipe 6. The bottom side of the filter box 1 and the top side of the water collection tank 2 are connected through a U-shaped pipe 8. A second valve 9 is fixedly installed on the shaped pipe 8. A first filter screen 10 is provided inside the filter box 1. A backwash water pipe 11 is connected to the top side of the filter box 1. The backwash water pipe 11 A third valve 12 is fixedly installed on the filter box 1 , a first water outlet pipe 13 is connected to the bottom side of the filter box 1 , and a fourth valve 14 is fixedly installed on the first water outlet pipe 13 .

A first water pipe 15 is connected between the bottom of the water collection tank 2 and the input end of the water pump 3. A fifth valve 16 is fixedly installed on the first water pipe 15. The top of the spray tower 4 A spray pipe 17 is fixed. The output end of the water pump 3 is connected to one end of the spray pipe 17 through a second water pipe 18. A second filter 19 is provided inside the spray tower 4. A discharge port 20 is provided on one side of the bottom of the second filter screen 19. An opening and closing material discharging assembly 21 is provided outside the discharge port 20. A drainage pipe 22 is connected to the bottom of the spray tower 4. The other end of the drainage pipe 22 is connected to the top of the purification box 5 . A first adsorption layer 23 is provided inside the purification box 5 . A second outlet pipe 24 is connected to the bottom of the purification box 5 .

Referring to Figures 3 and 4, in order to increase the sealing performance of the connection between the first filter screen 10 and the filter box 1 and prevent water leakage; the first filter screen 10 is slidably disposed inside the filter box 1. A first rubber seal 25 is provided between the filter screen 10 and the filter box 1 , and the top of the first filter screen 10 is connected to the filter box 1 through a detachable component 26 .

Referring to Figures 3 and 4, the detachable component 26 includes a cover plate 261, a slot 262, a protrusion 263, a fixing block 264 and a fastening bolt 265. The cover plate 261 is provided on the top of the filter box 1, The clamping slot 262 is opened on the inner surface of the cover plate 261, and the protruding block 263 is fixedly arranged on the top of the first filter 10. The protruding block 263 is engaged in the clamping slot 262, so The fixing block 264 is welded to the outer surface of the cover plate 261, and the fixing block 264 is connected to the top of the filter box 1 through the fastening bolts 265; by unscrewing the fastening bolts 265, the cover plate 261 Remove it from the top of the filter box 1 and drive the first filter screen 10 to move by pulling the bump 263, so that the first filter screen 10 can be disassembled to facilitate cleaning of the first filter screen 10.

Referring to Figure 1, in order to increase the stability of the installation of the cover plate 261, thereby improving the stability of the installation of the first filter 10; the fixing blocks 264 and the fastening bolts 265 are provided with four groups, and the four groups of the fixing blocks 264 are provided with four groups. The block 264 and the four sets of fastening bolts 265 are symmetrically arranged on both sides of the cover plate 261 .

Referring to Figures 2 and 5, in order to facilitate air intake and outlet, and to purify the discharged gas; one side of the spray tower 4 is connected with an air inlet pipe 27, and the top of the spray tower 4 is connected with an air inlet pipe 27. There is an air outlet pipe 28, and a second adsorption layer 29 is provided inside the top of the spray tower 4.

Referring to Figure 5, in order to facilitate the adsorption of impurities in gas and water and increase the purification effect, the first adsorption layer 23 and the second adsorption layer 29 are both set as activated carbon adsorption layers.

Referring to Figure 5, in order to prevent the discharge of spray water from being affected and facilitate the processing of filtered impurities, the second filter 19 is tilted, and the tilt angle is 30-60°.

Referring to FIG. 5 , in order to increase the adequacy of water discharge; an inclined guide plate 30 is provided inside the bottom of the spray tower 4 , and the bottom of the inclined guide plate 30 is provided at the drainage pipe 22 .

Referring to Figures 5-6, the opening and closing blanking assembly 21 includes two sets of servo cylinders 211, a connecting plate 212, a push-pull rod 213, a baffle 214 and a second rubber seal 215. The two sets of servo cylinders 211 Fixedly installed on the outer surface of the spray tower 4, one end of the connecting plate 212 is fixedly connected to the output end of the servo cylinder 211, and the second rubber sealing gasket 215 is fixedly provided on the baffle 214 The outer surface of the baffle 214 is sealed and inserted at the discharge port 20. One end of the push-pull rod 213 is welded to the outer surface of the baffle 214, and the other end of the push-pull rod 213 is welded to the outer surface of the baffle 214. The inner surface of the connecting plate 212; the servo cylinder 211 drives the connecting plate 212 to move, the connecting plate 212 drives the push-pull rod 213 to move, the push-pull rod 213 drives the baffle 214 to move, so that the baffle 214 is moved away from the discharge port 20, and the The discharge port 20 is opened to process the impurities at the second filter 19.

An energy-saving chilled water recycling method includes the following steps:

S1. Close the third valve 12 and the fourth valve 14, open the first valve 7 and the second valve 9, let the chilled water enter the filter box 1 through the chilled water inlet pipe 6, and use the filter to filter the chilled water and remove impurities. The filtered chilled water enters the water collecting tank 2 through the U-shaped pipe 8;

S2. Open the fifth valve 16, extract the chilled water inside the water collecting tank 2 through the water pump 3, transport it to the spray pipe 17 through the first water pipe 15 and the second water pipe 18, and spray it to the gas inside the spray tower 4. Spray treatment is performed, and the treated gas is purified through the first adsorption layer 23 and then discharged from the gas outlet pipe 28;

S3. The water after spraying is filtered through the second filter 19. The filtered water enters the purification box 5 through the water outlet pipe. The first adsorption layer 23 is used to purify the water. The purified water passes through the second outlet. The water pipe 24 is discharged and collected for recycling;

S4. Clean the first filter screen 10: open the third valve 12 and the fourth valve 14, close the first valve 7 and the second valve 9, and send high-pressure water into the backwash water pipe 11 to clean the first filter screen 10. Backwash, filtered impurities are discharged from the first water outlet pipe 13, and the first filter screen 10 is regularly disassembled and maintained through the provided detachable component 26 to maintain the filtering effect of the first filter screen 10;

S5. Impurity removal from spray tower 4: The servo electric cylinder 211 drives the connecting plate 212 to move, the connecting plate 212 drives the push-pull rod 213 to move, and the push-pull rod 213 drives the baffle 214 to move, so that the baffle 214 moves away from the discharge port 20 , open the discharge port 20 and process the impurities at the second filter 19;

S6. After cleaning is completed, reset the structure and continue recycling of chilled water.

Referring to Figures 1 to 6, the present invention can filter the recovered frozen water by arranging the filter box 1 and the first filter screen 10, thereby purifying the frozen water, and using the water collecting box 2 to purify the purified frozen water. The water is collected for easy reuse; by setting the backwash water pipe 11 and the first water outlet pipe 13, the first filter screen 10 can be backwashed, thereby facilitating the discharge of impurities filtered by the first filter screen 10 and increasing filtration. Effect: Through the second filter 19 provided, the chilled water used in the spray tower 4 can be filtered, and the discharged water can be purified through the purification box 5, thereby facilitating the reuse of the purified water and further improving the efficiency. Water resource utilization efficiency.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principles and spirit of the invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (10)

1. An energy-saving chilled water recovery system, characterized in that: it includes a filter box (1), a water collection tank (2), a water pump (3), a spray tower (4) and a purification box (5). The filter box (5) A chilled water inlet pipe (6) is connected to the top side of the filter box (1). A first valve (7) is fixedly installed on the chilled water inlet pipe (6). The bottom side of the filter box (1) is connected to the filter box (1). The top side of the water collection box (2) is connected through a U-shaped pipe (8). A second valve (9) is fixedly installed on the U-shaped pipe (8). The filter box (1) is provided with a The first filter screen (10) is connected to the top side of the filter box (1) with a backwash water pipe (11), and a third valve (12) is fixedly installed on the backwash water pipe (11). A first water outlet pipe (13) is connected to one side of the bottom of the filter box (1), and a fourth valve (14) is fixedly installed on the first water outlet pipe (13); A first water pipe (15) is connected between the bottom of the water collection tank (2) and the input end of the water pump (3), and a fifth valve (16) is fixedly installed on the first water pipe (15). ), a spray pipe (17) is fixed on the top of the spray tower (4), and the output end of the water pump (3) is connected to one end of the spray pipe (17) through the second water pipe (18) It is set that a second filter screen (19) is provided inside the spray tower (4), and a discharge port (20) is provided on one side of the bottom of the second filter screen (19). The discharge port (20) An opening and closing unloading assembly (21) is provided on the outside of the spray tower (4). A drainage pipe (22) is connected to the bottom of the spray tower (4). The other end of the drainage pipe (22) is connected to the purification box (20). The top of the purification box (5) is connected with the first adsorption layer (23), and the bottom of the purification box (5) is connected with a second water outlet pipe (24). 2. The energy-saving chilled water recovery system according to claim 1, characterized in that: the first filter screen (10) is slidably installed inside the filter box (1), and the first filter screen (10) A first rubber sealing gasket (25) is provided between the filter box (1) and the top of the first filter screen (10) is connected to the filter box (1) through a detachable assembly (26). 3. The energy-saving chilled water recovery system according to claim 2, characterized in that: the detachable component (26) includes a cover plate (261), a slot (262), a convex block (263), and a fixed block (264). ) and fastening bolts (265), the cover plate (261) is arranged on the top of the filter box (1), the clamping groove (262) is opened on the inner surface of the cover plate (261), the The bump (263) is fixedly arranged on the top of the first filter (10), the bump (263) is clamped in the slot (262), and the fixing block (264) is welded to the On the outer surface of the cover plate (261), the fixing block (264) is connected to the top of the filter box (1) through the fastening bolts (265). 4. The energy-saving chilled water recovery system according to claim 3, characterized in that four groups of the fixed blocks (264) and the fastening bolts (265) are provided correspondingly, and four groups of the fixed blocks (264) are provided. and four sets of fastening bolts (265) are symmetrically arranged on both sides of the cover plate (261). 5. The energy-saving chilled water recovery system according to claim 1, characterized in that: one side of the spray tower (4) is connected with an air inlet pipe (27), and the top of the spray tower (4) is connected with An air outlet pipe (28) is provided, and a second adsorption layer (29) is provided inside the top of the spray tower (4). 6. The energy-saving chilled water recovery system according to claim 5, characterized in that: the first adsorption layer (23) and the second adsorption layer (29) are both configured as activated carbon adsorption layers. 7. The energy-saving chilled water recovery system according to claim 1, characterized in that the second filter (19) is tilted, and the tilt angle is 30-60°. 8. The energy-saving chilled water recovery system according to claim 1, characterized in that: an inclined guide plate (30) is provided inside the bottom of the spray tower (4), and the inclined guide plate (30) The bottom is provided at the drainage pipe (22). 9. The energy-saving chilled water recovery system according to claim 1, characterized in that: the opening and closing blanking assembly (21) includes two sets of servo electric cylinders (211), connecting plates (212), and push-pull rods (213) , baffle (214) and second rubber sealing gasket (215), two groups of servo electric cylinders (211) are fixedly installed on the outer surface of the spray tower (4), one end of the connecting plate (212) Fixedly connected to the output end of the servo electric cylinder (211), the second rubber sealing gasket (215) is fixedly provided on the outer surface of the baffle (214), and the baffle (214) is sealed and inserted into At the discharge port (20), one end of the push-pull rod (213) is welded to the outer surface of the baffle (214), and the other end of the push-pull rod (213) is welded to the connecting plate (212). ) inner surface. 10. An energy-saving chilled water recycling method, characterized in that: the recycling method is implemented by the recycling system according to any one of claims 1 to 9, and includes the following steps: S1. Close the third valve (12) and the fourth valve (14), open the first valve (7) and the second valve (9), and allow the chilled water to enter the filter box (1) through the chilled water inlet pipe (6) , use the filter to filter and remove impurities from the chilled water, and the filtered chilled water enters the water collection tank (2) through the U-shaped pipe (8); S2. Open the fifth valve (16), pump the chilled water inside the water collecting tank (2) through the water pump (3), and transport it to the spray pipe (17) through the first water pipe (15) and the second water pipe (18). ) is sprayed out to spray the gas inside the spray tower (4). The treated gas is purified through the first adsorption layer (23) and then discharged from the gas outlet pipe (28); S3. The water after spraying is filtered through the second filter (19). The filtered water enters the purification box (5) through the water outlet pipe. The first adsorption layer (23) is used to purify the water. After purification The water is discharged through the second outlet pipe (24) and collected for recycling; S4. Clean the first filter (10): open the third valve (12) and the fourth valve (14), close the first valve (7) and the second valve (9), and backwash the water pipe (11) High-pressure water is sent in to backwash the first filter screen (10), and the filtered impurities are discharged from the first water outlet pipe (13). Through the set detachable component (26), the first filter screen (10) is ) Carry out regular disassembly and maintenance to maintain the filtering effect of the first filter (10); S5. Spray tower (4) impurity removal: the servo electric cylinder (211) drives the connecting plate (212) to move, the connecting plate (212) drives the push-pull rod (213) to move, and the push-pull rod (213) drives the baffle (214) Move the baffle (214) away from the discharge port (20), open the discharge port (20), and process the impurities at the second filter screen (19); S6. After cleaning is completed, reset the structure and continue recycling of chilled water.