Energy-saving cooling structure and cooling method of central air conditioning system

Abstract

The invention relates to the technical field of air conditioning systems, in particular to an energy-saving cooling structure and a cooling method of a central air conditioning system. On one hand, hot air firstly passes through a cooling coil to exchange heat with a refrigerant for preliminary cooling in a manner of combining the cooling coil with an atomizing nozzle; the temperature of the cooling coil pipe is further reduced through evaporation and heat absorption of fine water drops sprayed by the atomizing spray head, the cooling efficiency is greatly improved, the energy consumption is reduced, meanwhile, the running power of the circulating water pump is low, the waste of water resources is reduced through water recycling, and the energy consumption of the central air-conditioning system is reduced on the whole; and on the other hand, the circulating water pump and the flow control valve can be accurately controlled through the controller, the water flow is adjusted in real time according to changes of the indoor temperature and humidity, accurate control over the cooling process is achieved, and it is ensured that the indoor environment is always kept in a comfortable state.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning systems, and in particular to an energy-saving cooling structure and a cooling method for a central air conditioning system. Background Art

[0002] Central air-conditioning systems have been widely used in various types of buildings due to their excellent performance and advantages, and have become an indispensable and important part of modern buildings; the existing document with announcement number CN211575333U discloses an energy-saving cooling structure of a central air-conditioning system, which includes a water source heat pump, the output end of the water source heat pump is connected to a first low-temperature cooling water pipe, the end of the first low-temperature cooling water pipe away from the water source heat pump is connected to a cooling water pump, the output end of the cooling water pump is connected to a second low-temperature cooling water pipe, and the other end of the second low-temperature cooling water pipe is connected to the input end of a water-cooled refrigerator, and the output end of the water-cooled refrigerator is connected to a high-temperature cooling water pipe. The energy-saving cooling structure of the central air-conditioning system utilizes the water source heat pump to absorb the heat of the high-temperature cooling water generated by the water-cooled refrigerator, while reducing the water temperature of the cooling water, it can avoid the loss of this part of heat, so that this part of heat can be fully utilized, thereby achieving the purpose of energy saving.

[0003] The above schemes and traditional central air-conditioning systems often have the problem of high energy consumption during operation, which not only increases energy consumption and operating costs, but also is inconsistent with the current development concept of energy conservation and emission reduction. In the central air-conditioning system, the cooling link is a key part, which usually requires a large amount of energy to achieve air cooling. The common central air-conditioning cooling methods are mainly air cooling and water cooling, but these methods have certain limitations in terms of energy utilization efficiency. The air cooling method is greatly affected by the ambient temperature and has poor cooling effect in high temperature environments. The water cooling method requires a large amount of water resources, and the water circulation cooling process will also consume a certain amount of energy. Therefore, improvements and optimizations are needed to address this problem.

[0004] To this end, the present invention proposes an energy-saving cooling structure and cooling method for a central air-conditioning system to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide an energy-saving cooling structure and cooling method for a central air-conditioning system to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: an energy-saving cooling structure of a central air-conditioning system, comprising a cooling assembly, the cooling assembly comprising an air duct, a cooling coil, a water collection port, a water tank, a water outlet pipe, a circulating water pump, a water delivery pipe, a spraying trough, a spraying hood, an atomizing nozzle, a flow control valve and a controller and a filter assembly;

[0007] A cooling coil is fixedly connected to the middle of the inner wall of the air duct, and the two ends of the cooling coil respectively penetrate the two sides of the lower part of the rear surface of the air duct, and a water collecting port is opened in the middle of the lower surface of the air duct. A water tank is welded to the outer side of the lower surface of the air duct near the water collecting port, and the lower part of the rear surface of the water tank is connected to a water outlet pipe, and a circulating water pump is installed at the water outlet end of the water outlet pipe;

[0008] The water outlet of the circulating water pump is connected to a water delivery pipe, a spraying slot is provided in the middle of the upper surface of the air duct, and a spraying cover is welded on the upper surface of the air duct near the outer side of the spraying slot;

[0009] The filter screen assembly is arranged at the bottom side of the air duct.

[0010] Preferably, the water outlet end of the water pipe passes through the center of the upper surface of the spray hood, an atomizing nozzle is installed at the water outlet end of the water pipe, a flow control valve is installed on the side of the outer wall of the water pipe close to the atomizing nozzle, a controller is fixedly connected to the middle of the front surface of the air duct, and the input ends of the flow control valve and the circulating water pump are electrically connected to the output end of the controller.

[0011] Preferably, a slot is provided on the upper part of the front surface of the water tank, a filter frame is slidably connected to the inner wall of the slot, a card slot is provided on the upper part of the inner wall of the filter frame, a filter mesh assembly is fitably connected to the inner wall of the card slot, a sealing cover is fixedly connected to the front surface of the filter frame, the middle parts of both sides of the sealing cover are fixedly connected to the upper parts of both sides of the water tank through locks, and a pull button is fixedly connected to the center of the front surface of the sealing cover.

[0012] Preferably, a fan is installed on a side of the inner wall of the air duct close to the air outlet.

[0013] Preferably, a water level sensor is installed on one side of the inner wall of the water tank, and the output end of the water level sensor is electrically connected to the input end of the controller.

[0014] Preferably, a water supply pipe is connected to the lower portion of the front surface of the water tank, a water supply solenoid valve is installed in the middle of the outer wall of the water supply pipe, and an input end of the water supply solenoid valve is electrically connected to an output end of the controller.

[0015] Preferably, a sewage pipe is connected to the center of the lower surface of the water tank, and a sewage solenoid valve is installed in the middle of the outer wall of the sewage pipe, and the input end of the sewage solenoid valve is electrically connected to the output end of the controller; the upper parts of both sides of the inner wall of the water tank are fixedly connected to limit slides, and the middle parts of both sides of the filter frame are provided with limit slides, and the inner walls of the limit slides are slidably connected to the outer walls of the limit slides; connecting plates are welded at both ends of the air duct, and a mounting hole is provided on one side of the connecting plate.

[0016] Preferably, the filter assembly includes a first filter plate, a first mesh, a mounting screw groove, a second filter plate, a connecting through hole, a receiving groove, a connecting screw, a second mesh, a drainage trough body, a receiving groove and a filtering pore; the first mesh holes are equidistantly arranged in the first filter plate, and the mounting screw grooves are arranged at the bottom side corners of the first filter plate, the four corners of the second filter plate are arranged with connecting through holes, and the bottom end openings of the connecting through holes are arranged with receiving grooves, and the first filter plate and the second filter plate are connected by connecting screws.

[0017] Preferably, the second filter plate is provided with second mesh holes at equal intervals, and a drainage groove body is provided at the side of the top opening of the second mesh hole, the other end of the drainage groove body is connected to the accommodating groove, and the accommodating groove is provided with filtering pores at equal intervals; the accommodating groove corresponds to the setting position of the first mesh hole, and the first mesh hole and the second mesh hole are staggered.

[0018] A cooling method for an energy-saving cooling structure of a central air-conditioning system, the cooling method comprising:

[0019] S1: Install the energy-saving cooling structure in the central air-conditioning system, connect the two ends of the cooling coil to the refrigerant pipes of the central air-conditioning system, start the central air-conditioning system and the energy-saving cooling structure, conduct preliminary debugging, and check the operating status of each component, including fan rotation, circulating water pump operation, water level sensor response, etc. After ensuring that everything is normal, proceed to the next step;

[0020] S2: The fan starts working, sucking the hot air in the room into the air duct. The hot air passes through the cooling coil in the air duct and exchanges heat with the refrigerant in the cooling coil, reducing the air temperature.

[0021] S3: The controller starts the circulating water pump according to the preset program and parameters, and delivers the water in the water tank to the atomizing nozzle through the outlet pipe and the water delivery pipe. The atomizing nozzle atomizes the water into fine droplets and sprays them on the cooling coil, using the principle of water evaporation and heat absorption to reduce the temperature of the cooling coil;

[0022] S4: Part of the water sprayed on the cooling coil evaporates and absorbs heat. The evaporated water vapor is taken away by the fan and mixed with the indoor air after entering the room, increasing the humidity of the indoor air. The other part of the unevaporated water flows along the cooling coil into the water collection port at the bottom of the air duct, and then flows into the water tank after being filtered by the filter assembly in the filter frame for recycling;

[0023] S5: The water level sensor monitors the water level in the water tank in real time and transmits the water level information to the controller. If the water level is lower than the preset minimum water level, the controller controls the water supply solenoid valve to open and add water to the water tank. When the water level reaches the preset maximum water level, the water supply solenoid valve closes and stops supplying water.

[0024] S6: After a period of operation, if dirt and impurities accumulate in the water tank, open the sewage solenoid valve to discharge the sewage through the sewage pipe.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The energy-saving cooling structure of the central air-conditioning system designed by the present invention, on the one hand, mainly combines the cooling coil with the atomizing nozzle, the hot air first passes through the cooling coil to exchange heat with the refrigerant for preliminary cooling, and then the fine water droplets sprayed by the atomizing nozzle evaporate and absorb heat to further reduce the temperature of the cooling coil, thereby greatly improving the cooling efficiency and reducing energy consumption. At the same time, the operating power of the circulating water pump is low, and the recycling of water reduces the waste of water resources, thereby reducing the energy consumption of the central air-conditioning system as a whole; on the other hand, the circulating water pump and the flow control valve can be accurately controlled by the controller, and the water flow rate can be adjusted in real time according to the changes in indoor temperature and humidity, thereby achieving accurate control of the cooling process and ensuring that the indoor environment is always maintained in a comfortable state. At the same time, the water vapor sprayed by the atomizing nozzle is brought into the room by the fan and mixed with the indoor air, thereby increasing the humidity of the indoor air and improving the comfort of the indoor environment; further, by arranging a filter in the water tank, impurities in the water can be effectively filtered, the cleanliness of the circulating water can be ensured, and the service life of the system can be extended, and the filter frame is convenient to disassemble and assemble, and it is convenient to regularly clean and replace the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A top view of the cooling structure connection of the air conditioning system of the present invention;

[0028] Figure 2 A bottom view of the cooling structure connection of the air conditioning system of the present invention;

[0029] Figure 3 It is a cross-sectional schematic diagram of the connection of the cooling structure of the air conditioning system of the present invention;

[0030] Figure 4 This is a schematic diagram of the internal structure connection of the air duct of the present invention;

[0031] Figure 5 This is a schematic diagram of the water tank structure connection of the present invention;

[0032] Figure 6 This is a schematic diagram of the connection between the filter screen assembly and the filter frame structure of the present invention;

[0033] Figure 7 A top view of the structure connection of the filter screen assembly of the present invention;

[0034] Figure 8 A bottom view of the structure connection of the filter screen assembly of the present invention;

[0035] Fig. 9 For the present invention Figure 8 A magnified schematic diagram of the structural connection at center A;

[0036] Fig.10 For the present invention Figure 8 A magnified schematic diagram of the structural connection at B in the middle;

[0037] Fig.11 This is a schematic diagram of the connection structure of the second filter plate of the present invention;

[0038] Fig.12 For the present invention Fig.11 Enlarged schematic diagram of the structural connection at point C in the middle.

[0039] In the figure: air duct 11, cooling coil 12, water collection port 13, water tank 14, water outlet pipe 15, circulating water pump 16, water delivery pipe 17, spraying trough 18, spraying cover 19;

[0040] Atomizing nozzle 20, flow control valve 21, controller 22, slot 23, filter frame 24, card slot 25, filter screen assembly 26, first filter plate 2601, first mesh 2602, mounting screw groove 2603, second filter plate 2604, connecting through hole 2605, receiving groove 2606, connecting screw 2607, second mesh 2608, drainage tank body 2609, receiving groove 2610, filter pore 2611, sealing cover 27, lock buckle 28;

[0041] Water level sensor 30 , water supply pipe 31 , water supply solenoid valve 32 , sewage discharge pipe 33 , sewage discharge solenoid valve 34 , limit slide bar 35 , limit slide groove 36 , pull button 37 , connection plate 38 . DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention are described clearly and completely below. The embodiments of the present invention and all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0043] Example 1: Please refer to Figure 1-Figure 12, an energy-saving cooling structure of a central air-conditioning system, including a cooling assembly, the cooling assembly including an air duct 11, a cooling coil 12, a water collection port 13, a water tank 14, a water outlet pipe 15, a circulating water pump 16, a water delivery pipe 17, a spraying trough 18, a spraying cover 19, an atomizing nozzle 20, a flow control valve 21 and a controller 22 and a filter assembly 26; the cooling coil 12 is fixedly connected to the middle of the inner side wall of the air duct 11, and the two ends of the cooling coil 12 respectively penetrate the air duct 11 On both sides of the lower part of the rear surface, a water collecting port 13 is opened in the middle of the lower surface of the air duct 11, and a water tank 14 is welded to the outer side of the lower surface of the air duct 11 near the water collecting port 13. The lower part of the rear surface of the water tank 14 is connected with a water outlet pipe 15, and a circulating water pump 16 is installed at the water outlet end of the water outlet pipe 15; wherein the water outlet end of the circulating water pump 16 is connected with a water delivery pipe 17, a spraying groove 18 is opened in the middle of the upper surface of the air duct 11, and a spray cover 19 is welded to the outer side of the upper surface of the air duct 11 near the spraying groove 18.

[0044] The filter assembly 26 is disposed at the bottom side of the air duct 11 .

[0045] The water outlet end of the water pipe 17 here passes through the center of the upper surface of the spray hood 19, and an atomizing nozzle 20 is installed at the water outlet end of the water pipe 17. A flow control valve 21 is installed on the side of the outer wall of the water pipe 17 close to the atomizing nozzle 20. A controller 22 is fixedly connected to the middle of the front surface of the air duct 11, and the input ends of the flow control valve 21 and the circulating water pump 16 are electrically connected to the output end of the controller 22; a slot 23 is provided on the upper part of the front surface of the water tank 14, and a filter frame 24 is slidably connected to the inner wall of the slot 23. A card slot 25 is provided on the upper part of the inner wall of the filter frame 24, and a filter screen assembly 26 is fitted and connected to the inner wall of the card slot 25. A sealing cover 27 is fixedly connected to the front surface of the filter frame 24, and the sealing cover 27 The middle parts of both sides are fixedly connected to the upper parts of both sides of the water tank 14 by lock buckles 28, and a button 37 is fixedly connected to the center of the front surface of the sealing cover 27; a fan 29 is installed on the inner wall of the air duct 11 near the air outlet, and the cold air cooled by the cooling coil 12 is discharged into the room through the fan 29, which effectively reduces the indoor temperature. At the same time, the evaporated water vapor increases the humidity of the indoor air, which helps to improve the indoor environment and improve the comfort of living or working; a water level sensor 30 is installed on one side of the inner wall of the water tank 14, and the output end of the water level sensor 30 is electrically connected to the input end of the controller 22. The water level sensor 30 is convenient for real-time monitoring of the water level inside the water tank 14 and transmitting the water level information to the controller 22.

[0046] The lower part of the front surface of the water tank 14 is connected with a water supply pipe 31, and a water supply solenoid valve 32 is installed in the middle of the outer wall of the water supply pipe 31. The input end of the water supply solenoid valve 32 is electrically connected to the output end of the controller 22. The controller 22 receives the water level information transmitted by the water level sensor 30 and analyzes it. If the water level is lower than the preset minimum water level, the controller 22 controls the water supply solenoid valve 32 to open, and replenishes water into the water tank 14 through the external water source of the water supply pipe 31. After the water level reaches the preset maximum water level, the controller 22 automatically closes the water supply solenoid valve 32 and stops replenishing water. The center of the lower surface of the water tank 14 is connected with a sewage pipe 33, and a sewage discharge solenoid valve 34 is installed in the middle of the outer wall of the sewage pipe 33. The input end of the sewage discharge solenoid valve 34 is electrically connected to the output end of the controller 22. 2 The sewage discharge solenoid valve 34 is opened, so that the sewage in the water tank 14 is discharged through the sewage discharge pipe 33, and the sewage discharge pipe 33 can be connected to an external sewage pipe; the upper parts of the inner side walls of the water tank 14 are fixedly connected to the limit slide bars 35, and the middle parts of the two sides of the filter frame 24 are provided with limit slide grooves 36, and the inner side walls of the limit slide grooves 36 are slidably connected to the outer side walls of the limit slide bars 35, and the filter frame 24 is slid along the limit slide bars 35 through the limit slide grooves 36 on the filter frame 24, so as to limit the filter frame 24; here, connecting plates 38 are welded at both ends of the air duct 11, and a plurality of mounting holes are opened on one side of the connecting plate 38. Through the connecting plate 38 and the mounting holes thereon, the air duct 11 is conveniently installed on the air duct of the central air-conditioning system, and is connected with the air duct of the central air-conditioning system to form an integrated refrigeration pipeline.

[0047] A cooling method for an energy-saving cooling structure of a central air-conditioning system, the cooling method comprising:

[0048] The energy-saving cooling structure is installed in the central air-conditioning system, and the two ends of the cooling coil 12 are respectively connected to the refrigerant pipeline of the central air-conditioning. The central air-conditioning system and the energy-saving cooling structure are turned on for preliminary debugging, and the operating status of each component is checked, including the rotation of the fan 29, the operation of the circulating water pump 16, the response of the water level sensor 30, etc. After ensuring that everything is normal, the next step is performed; the fan 29 starts to work, and the hot air in the room is sucked into the air duct 11. The hot air passes through the cooling coil 12 in the air duct 11 and exchanges heat with the refrigerant in the cooling coil 12 to reduce the air temperature; the controller 22 controls the circulating water pump 16 to start according to the preset program and parameters, and transports the water in the water tank 14 to the atomizing nozzle 20 through the outlet pipe 15 and the water delivery pipe 17. The atomizing nozzle 20 atomizes the water into fine water droplets and sprays them on the cooling coil 12, using the principle of water evaporation and heat absorption to reduce The temperature of the cooling coil 12; part of the water sprayed on the cooling coil 12 evaporates and absorbs heat, and the evaporated water vapor is taken away by the fan 29, and after entering the room, it mixes with the indoor air to increase the humidity of the indoor air. The other part of the unevaporated water flows along the cooling coil 12 into the water collection port 13 at the bottom of the air duct 11, and then flows into the water tank 14 after being filtered by the filter assembly 26 in the filter frame 24 for recycling; the water level sensor 30 monitors the water level in the water tank 14 in real time, and transmits the water level information to the controller 22. If the water level is lower than the preset minimum water level, the controller 22 controls the water replenishment solenoid valve 32 to open and replenish water into the water tank 14. After the water level reaches the preset maximum water level, the water replenishment solenoid valve 32 is closed and the water replenishment is stopped; after a period of operation, if dirt and impurities accumulate in the water tank 14, the sewage discharge solenoid valve 34 is opened to discharge the sewage through the sewage pipe 33.

[0049] Example 2: Based on Example 1, please refer to Figure 7-Figure 12The filter assembly 26 includes a first filter plate 2601, a first mesh 2602, a mounting screw groove 2603, a second filter plate 2604, a connecting through hole 2605, a receiving groove 2606, a connecting screw 2607, a second mesh 2608, a drainage tank body 2609, a receiving groove 2610 and a filtering pore 2611; the first mesh 2602 is arranged at an equal distance on the first filter plate 2601, and the mounting screw groove 2603 is arranged at the bottom corner position of the first filter plate 2601, and the four corner positions of the second filter plate 2604 are provided with connecting through holes 2605, and the bottom end hole of the connecting through hole 2605 A receiving groove 2606 is provided at the opening position, and the first filter plate 2601 is connected to the second filter plate 2604 by connecting screws 2607; here, second mesh holes 2608 are equidistantly arranged in the second filter plate 2604, and a drainage groove body 2609 is provided at the edge of the top opening of the second mesh hole 2608, and the other end of the drainage groove body 2609 is connected to the receiving groove 2610, and filtering pores 2611 are equidistantly arranged in the receiving groove 2610; the receiving groove 2610 corresponds to the setting position of the first mesh hole 2602, and the first mesh hole 2602 and the second mesh hole 2608 are staggered.

[0050] In this embodiment, when filtering through the filter assembly 26, the circulating water is first filtered through the first filter plate 2601, and then the circulating water enters the receiving groove 2610 on the second filter plate 2604 from the first mesh 2602, and then further filtered through the filter pores 2611 in the receiving groove 2610 to improve its filtering effect; and the receiving groove 2610 here also has a certain storage function, which is convenient for subsequent disassembly and cleaning; if the filter pores 2611 are blocked, the circulating water can also flow out from the second mesh 2608 through the drainage trough 2609, and on the basis of achieving the filtering work, the blockage problem is avoided as much as possible; after the first filter plate 2601 and the second filter plate 2604 are connected, they are tightly connected by connecting screws 2607 to form a double-layer filtering structure; further, when disassembly and cleaning are required, the two can be separated to facilitate the work of the cleaning rod.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving cooling structure for a central air-conditioning system, characterized in that: The cooling assembly comprises an air duct (11), a cooling coil (12), a water collection port (13), a water tank (14), a water outlet pipe (15), a circulating water pump (16), a water delivery pipe (17), a spraying trough (18), a spraying hood (19), an atomizing nozzle (20), a flow control valve (21), a controller (22) and a filter assembly (26); A cooling coil (12) is fixedly connected to the middle of the inner wall of the air duct (11), and two ends of the cooling coil (12) respectively penetrate the two sides of the lower part of the rear surface of the air duct (11). A water collection port (13) is provided in the middle of the lower surface of the air duct (11). A water tank (14) is welded to the outer side of the lower surface of the air duct (11) near the water collection port (13). The lower part of the rear surface of the water tank (14) is connected to a water outlet pipe (15), and a circulating water pump (16) is installed at the water outlet end of the water outlet pipe (15); The water outlet of the circulating water pump (16) is connected to a water delivery pipe (17); a spraying groove (18) is provided in the middle of the upper surface of the air duct (11); and a spraying cover (19) is welded to the outer side of the upper surface of the air duct (11) near the spraying groove (18); The filter screen assembly (26) is arranged at the bottom side of the air duct (11).

2. The energy-saving cooling structure of a central air-conditioning system according to claim 1, characterized in that: The water outlet end of the water delivery pipe (17) passes through the center of the upper surface of the spray hood (19), an atomizing nozzle (20) is installed at the water outlet end of the water delivery pipe (17), a flow control valve (21) is installed on the side of the outer wall of the water delivery pipe (17) close to the atomizing nozzle (20), a controller (22) is fixedly connected to the middle of the front surface of the air duct (11), and the input ends of the flow control valve (21) and the circulating water pump (16) are electrically connected to the output end of the controller (22).

3. The energy-saving cooling structure of a central air-conditioning system according to claim 1, characterized in that: A slot (23) is provided at the upper portion of the front surface of the water tank (14); a filter frame (24) is slidably connected to the inner wall of the slot (23); a clamping slot (25) is provided at the upper portion of the inner wall of the filter frame (24); a filter screen assembly (26) is fittedly connected to the inner wall of the clamping slot (25); a sealing cover (27) is fixedly connected to the front surface of the filter frame (24); the middle portions of both sides of the sealing cover (27) are fixedly connected to the upper portions of both sides of the water tank (14) through locking buckles (28); and a pull button (37) is fixedly connected to the center of the front surface of the sealing cover (27).

4. The energy-saving cooling structure of a central air-conditioning system according to claim 1, characterized in that: A fan (29) is installed on one side of the inner wall of the air duct (11) close to the air outlet.

5. The energy-saving cooling structure of a central air-conditioning system according to claim 1, characterized in that: A water level sensor (30) is installed on one side of the inner wall of the water tank (14), and the output end of the water level sensor (30) is electrically connected to the input end of the controller (22).

6. The energy-saving cooling structure of a central air-conditioning system according to claim 1, characterized in that: The lower part of the front surface of the water tank (14) is connected to a water supply pipe (31), and a water supply solenoid valve (32) is installed in the middle of the outer wall of the water supply pipe (31), and the input end of the water supply solenoid valve (32) is electrically connected to the output end of the controller (22).

7. The energy-saving cooling structure of a central air-conditioning system according to claim 1, characterized in that: The center of the lower surface of the water tank (14) is connected to a sewage pipe (33), and a sewage solenoid valve (34) is installed in the middle of the outer wall of the sewage pipe (33), and the input end of the sewage solenoid valve (34) is electrically connected to the output end of the controller (22); the upper parts of both sides of the inner wall of the water tank (14) are fixedly connected to the limit slide bar (35), and the middle parts of both sides of the filter frame (24) are provided with a limit slide groove (36), and the inner wall of the limit slide groove (36) is slidably connected to the outer wall of the limit slide bar (35); both ends of the air duct (11) are welded with a connecting plate (38), and one side of the connecting plate (38) is provided with a mounting hole.

8. The energy-saving cooling structure of a central air-conditioning system according to claim 1, characterized in that: The filter assembly (26) comprises a first filter plate (2601), a first mesh hole (2602), a mounting screw groove (2603), a second filter plate (2604), a connecting through hole (2605), a receiving groove (2606), a connecting screw (2607), a second mesh hole (2608), a drainage slot body (2609), a receiving groove (2610) and a filtering pore (2611); the first filter plate (2601) is provided with the first mesh hole (2602) at equal intervals, and the bottom side corner position of the first filter plate (2601) is provided with the mounting screw groove (2603), the four corner positions of the second filter plate (2604) are provided with the connecting through holes (2605), and the bottom end opening position of the connecting through hole (2605) is provided with the receiving groove (2606), and the first filter plate (2601) and the second filter plate (2604) are connected by connecting screws (2607).

9. The energy-saving cooling structure of a central air-conditioning system according to claim 8, characterized in that: The second filter plate (2604) is provided with second mesh holes (2608) at equal intervals, and a drainage groove body (2609) is provided at the edge of the top opening of the second mesh hole (2608), and the other end of the drainage groove body (2609) is connected to the accommodating groove (2610), and the accommodating groove (2610) is provided with filtering pores (2611) at equal intervals; the accommodating groove (2610) corresponds to the setting position of the first mesh hole (2602), and the first mesh hole (2602) and the second mesh hole (2608) are staggered.

10. A cooling method for an energy-saving cooling structure of a central air-conditioning system according to any one of claims 1 to 9, characterized in that: The cooling method is: S1: Install the energy-saving cooling structure in the central air-conditioning system, connect the two ends of the cooling coil (12) to the refrigerant pipes of the central air-conditioning system, start the central air-conditioning system and the energy-saving cooling structure, perform preliminary debugging, and check the operating status of each component, including the rotation of the fan (29), the operation of the circulating water pump (16), the response of the water level sensor (30), etc. After ensuring that everything is normal, proceed to the next step; S2: The fan (29) starts to work, sucking the hot air in the room into the air duct (11). The hot air passes through the cooling coil (12) in the air duct (11), exchanges heat with the refrigerant in the cooling coil (12), and the air temperature is reduced. S3: The controller (22) controls the circulating water pump (16) to start according to the preset program and parameters, and transports the water in the water tank (14) to the atomizing nozzle (20) through the water outlet pipe (15) and the water delivery pipe (17). The atomizing nozzle (20) atomizes the water into fine water droplets, which are sprayed on the cooling coil (12), and the temperature of the cooling coil (12) is reduced by utilizing the principle of heat absorption by evaporation of water; S4: a portion of the water sprayed on the cooling coil (12) evaporates and absorbs heat, and the evaporated water vapor is taken away by the fan (29) and mixed with the indoor air after entering the room, thereby increasing the humidity of the indoor air; the other portion of the water that has not evaporated flows along the cooling coil (12) into the water collection port (13) at the bottom of the air duct (11), and then flows into the water tank (14) after being filtered by the filter assembly (26) in the filter frame (24) for recycling; S5: The water level sensor (30) monitors the water level in the water tank (14) in real time and transmits the water level information to the controller (22). If the water level is lower than a preset minimum water level, the controller (22) controls the water supply solenoid valve (32) to open and add water to the water tank (14). When the water level reaches a preset maximum water level, the water supply solenoid valve (32) is closed and water supply is stopped. S6: After a period of operation, if dirt and impurities are accumulated in the water tank (14), the sewage discharge solenoid valve (34) is opened to discharge the sewage through the sewage discharge pipe (33).

Images