A year-round antifreeze vertical indirect evaporative chiller

Abstract

The present invention discloses a year-round, antifreeze vertical indirect evaporative chiller, comprising an ethylene glycol air cooler, a vertical tube indirect air-water heat exchanger, a water sprinkling device, fillers and exhaust fans, a water tank, and the like. The vertical tube indirect air-water heat exchanger is composed of a water collector, a water distributor, fins, and vertical metal tubes; the vertical metal tubes are interspersed with fins, the water distributor is provided with a water inlet, and the water collector is provided with a water outlet; the water flowing through the tubes of the vertical tube indirect air-water heat exchanger can be derived from the cold water produced by the unit, or it can be cold water after heat exchange in a plate heat exchanger. A drain valve is provided below the water inlet of the water collector of the vertical tube indirect air-water heat exchanger to drain the water inside the tubes in winter to prevent freezing and cracking. The indirect evaporative chiller can be configured with an ethylene glycol air cooler and used to provide cooling and antifreeze when the temperature in a data center is below zero.

Description

Technical Field

[0001] The invention belongs to the technical field of air-conditioning equipment and relates to an antifreeze-proof year-round vertical indirect evaporative water chiller. Background Art

[0002] Air conditioning accounts for the largest portion of building energy consumption and is a key area of ​​energy conservation and emission reduction. Reducing air conditioning energy consumption while achieving optimal cooling performance has become a hot topic. Indirect evaporative chillers are widely used, but traditional externally cooled indirect evaporative chillers often experience damage to the air cooler due to incomplete water draining. To address this issue, this paper proposes a year-round, frost-resistant vertical indirect evaporative chiller. Summary of the Invention

[0003] The purpose of the present invention is to provide a year-round antifreeze vertical indirect evaporative water chiller, which can realize year-round antifreeze operation of the chiller.

[0004] The technical solution adopted by the present invention is a year-round antifreeze vertical indirect evaporative chiller, comprising a unit shell, air inlets are provided below the corresponding two side walls of the unit shell, a direct evaporative cooler is provided at the middle position of the unit shell, an exhaust port is provided at the top of the unit shell corresponding to the position of the direct evaporative cooler, and glycol air cooler b, vertical tube indirect air-water heat exchanger b and glycol air cooler a, vertical tube indirect air-water heat exchanger b are symmetrically provided at the positions corresponding to the air inlet on both sides of the direct evaporative cooler in the unit shell according to the air inlet direction. The indirect air-water heat exchanger a also includes a plate heat exchanger a, a plate heat exchanger b and a user terminal arranged outside the unit shell. The plate heat exchanger a and the plate heat exchanger b are respectively connected to the user terminal through pipes to form a circulation loop. The plate heat exchanger a is also connected to the direct evaporative cooler through a pipe. The plate heat exchanger b is also connected to the ethylene glycol air cooler a and the ethylene glycol air cooler b through pipes to form a circulation loop. The vertical tube indirect air-water heat exchanger b, the vertical tube indirect air-water heat exchanger a and the direct evaporative cooler also form a circulation loop through pipes.

[0005] Preferably, the direct evaporative cooler includes a filler at a position above the corresponding air inlet in the middle of the unit shell, and a spray device a, a spray device b, a water baffle and an exhaust fan are arranged above the filler from bottom to top. It also includes a water tank arranged at the bottom of the unit shell, and the water tank is connected to the plate heat exchanger a, the vertical tube indirect air-water heat exchanger a, and the vertical tube indirect air-water heat exchanger b through the water supply pipe, the water supply pipe a, and the water supply pipe b respectively. The plate heat exchanger a is also connected to the spray device b through the pipe G1, and the outlets of the vertical tube indirect air-water heat exchanger a and the vertical tube indirect air-water heat exchanger b are commonly connected to the spray device a.

[0006] Another technical solution adopted by the present invention is a year-round antifreeze vertical indirect evaporative chiller, comprising a unit shell, air inlets are provided below the corresponding two side walls of the unit shell, a direct evaporative cooler is provided at the middle position of the unit shell, an exhaust port is provided at the top of the unit shell corresponding to the position of the direct evaporative cooler, and glycol air cooler b, vertical tube indirect air-water heat exchanger b and glycol air cooler a, vertical tube indirect air-water heat exchanger b are symmetrically provided at the positions corresponding to the air inlet on both sides of the direct evaporative cooler in the unit shell according to the air inlet direction. The unit is connected to the air-water heat exchanger a, and also includes a plate heat exchanger a, a plate heat exchanger b and a user terminal arranged outside the unit shell. The plate heat exchanger a and the plate heat exchanger b are respectively connected to the user terminal through pipes to form a circulation loop. The plate heat exchanger a is also connected to the direct evaporative cooler through a water supply pipe. The plate heat exchanger b is also connected to the ethylene glycol air cooler a and the ethylene glycol air cooler b through pipes to form a circulation loop. The vertical tube indirect air-water heat exchanger b and the vertical tube indirect air-water heat exchanger a are also connected to the plate heat exchanger a through the water supply pipe b and the water supply pipe a respectively.

[0007] Preferably, the direct evaporative cooler includes a filler located in the middle of the unit shell at a position above the corresponding air inlet, and a spray device a, a water baffle and an exhaust fan are arranged above the filler from bottom to top. It also includes a water tank arranged at the bottom of the unit shell, and the water tank is connected to the plate heat exchanger a through a water supply pipe.

[0008] Preferably, the plate heat exchanger a is connected to the inlet of the user terminal through the pipeline G2, and the outlet of the user terminal is connected to the plate heat exchanger a through the pipeline G3;

[0009] The plate heat exchanger b is connected to the inlet of the user terminal on the pipe G2 through the pipe G4, and the outlet of the user terminal is connected to the plate heat exchanger b through the pipe G5. The inlets of the glycol air cooler a and the glycol air cooler b are connected to the plate heat exchanger b after being connected through the pipe G6 and the pipe G7 respectively. The outlets of the glycol air cooler a and the glycol air cooler b are connected to the plate heat exchanger b after being connected through the pipe G8 and the pipe G9 respectively.

[0010] Preferably, the vertical tube indirect air-water heat exchanger b and the vertical tube indirect air-water heat exchanger a have the same structure, both including a water collector and a water distributor arranged symmetrically in the upper and lower parts, a plurality of vertical metal tubes are connected between the water collector and the water distributor, fins are inserted into the plurality of vertical metal tubes, and a water outlet and a water inlet are respectively provided on the water collector and the water distributor, the water outlets of the vertical tube indirect air-water heat exchanger b and the vertical tube indirect air-water heat exchanger a are commonly connected to the spray device a, and the water inlets of the vertical tube indirect air-water heat exchanger b and the vertical tube indirect air-water heat exchanger a are respectively connected to the water supply pipe b and the water supply pipe a.

[0011] Preferably, a water supply pump is provided on the water supply pipe, a circulating water pump b is provided at the connection between the pipes G8 and G9 and the plate heat exchanger b, and a circulating water pump a is provided at the connection between the pipes G4 and G2 and the inlet of the user end.

[0012] Preferably, pipeline G3, pipeline G2, pipeline G4 and pipeline G5 are respectively provided with water valve a, water valve b, water valve c and water valve.

[0013] The beneficial effects of the present invention are

[0014] 1) The vertical tube indirect air-water heat exchanger of the present invention adopts a manifold and a riser form, which can drain the water in the heat exchanger cleanly when draining water, and will not freeze and crack the pipe in winter.

[0015] 2) A drain valve is installed below the water inlet of the water collector of the vertical tube indirect air-water heat exchanger to drain the water inside the pipe in winter to prevent freezing and cracking.

[0016] 3) The indirect chiller of the present invention is equipped with an ethylene glycol air cooler, which can operate and provide cooling in a sub-zero temperature environment, thereby meeting the cooling demand throughout the year.

[0017] 4) The upper portion of the water distributor of the vertical tube indirect air-water heat exchanger of the present invention is connected to an independent spraying device, which can spray independently. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of an antifreeze year-round vertical indirect evaporative chiller according to the present invention;

[0019] Figure 2 This is a second embodiment of the structure of a year-round antifreeze vertical indirect evaporative chiller according to the present invention;

[0020] Figure 3 This is a schematic structural diagram of a vertical tube indirect air-water heat exchanger in a year-round antifreeze vertical indirect evaporative chiller according to the present invention;

[0021] Figure 4 It is a cross-sectional view of a vertical tube indirect air-water heat exchanger in a year-round vertical indirect evaporative chiller according to the present invention.

[0022] In the figure, 1. exhaust fan, 2. water baffle, 3. spray device a, 4. filler, 5. vertical tube indirect air-water heat exchanger a, 6. ethylene glycol air cooler a, 7. water tank, 8. ethylene glycol air cooler b, 9. vertical tube indirect air-water heat exchanger b, 10. spray device b, 11. water supply pipe, 12. water supply pipe a, 13. water supply pipe b, 14. plate heat exchanger a, 15. plate heat exchanger b, 16. water valve a, 17. water valve b, 18. water valve c, 19. water valve d, 20. circulating water pump a, 21. user terminal, 22. circulating water pump b, 23. water outlet, 24. water collector, 25. fin, 26. vertical metal pipe, 27. water distributor, 28. water inlet, 29. air inlet, 30. exhaust outlet, 31. water supply pump. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The present invention provides an antifreeze year-round vertical indirect evaporative water chiller, the structure of which is as follows: Figure 1As shown, it includes a unit shell, an air inlet 29 is provided below the corresponding two side walls of the unit shell, a direct evaporative cooler is provided at the middle position of the unit shell, an exhaust port 30 is provided at the top of the unit shell corresponding to the position of the direct evaporative cooler, and the unit shell is symmetrically provided with ethylene glycol air cooler b8, vertical tube indirect air-water heat exchanger b9 and ethylene glycol air cooler a6, vertical tube indirect air-water heat exchanger a5 at the positions corresponding to the air inlet 29 on both sides of the direct evaporative cooler according to the air inlet direction. It also includes a unit shell provided The plate heat exchanger a14, plate heat exchanger b15 and user terminal 21 outside the shell, the plate heat exchanger a14, plate heat exchanger b15 and user terminal 21 respectively form a circulation loop through pipes, the plate heat exchanger a14 is also connected to the direct evaporative cooler through a pipe, the plate heat exchanger b15 also forms a circulation loop with the ethylene glycol air cooler a6 and ethylene glycol air cooler b8 through pipes, the vertical tube indirect air-water heat exchanger b9, the vertical tube indirect air-water heat exchanger a5 and the direct evaporative cooler also form a circulation loop through pipes. The direct evaporative cooler includes a filler 4 located in the middle of the unit shell at a position above the air inlet 29, and a spray device a3, a spray device b10, a water baffle 2 and an exhaust fan 1 are arranged above the filler 4 in sequence from bottom to top. It also includes a water tank 7 arranged at the bottom of the unit shell. The water tank 7 is connected to the plate heat exchanger a14, the vertical tube indirect air-water heat exchanger a5, and the vertical tube indirect air-water heat exchanger b9 through the water supply pipe 11, the water supply pipe a12, and the water supply pipe b13 respectively. The plate heat exchanger a14 is also connected to the spray device b10 through the pipeline G1, and the outlets of the vertical tube indirect air-water heat exchanger a5 and the vertical tube indirect air-water heat exchanger b9 are commonly connected to the spray device a3. The plate heat exchanger a14 is connected to the inlet of the user terminal 21 through the pipe G2, and the outlet of the user terminal 21 is connected to the plate heat exchanger a14 through the pipe G3. The plate heat exchanger b15 is connected to the inlet of the user terminal 21 through the pipe G2 through the pipe G4, and the outlet of the user terminal 21 is connected to the plate heat exchanger b15 through the pipe G5. The inlets of the glycol air cooler a6 and the glycol air cooler b8 are connected to the plate heat exchanger b15 through the pipe G6 and the pipe G7 respectively. The outlets of the glycol air cooler a6 and the glycol air cooler b8 are connected to the plate heat exchanger b15 through the pipe G8 and the pipe G9 respectively. Figure 3-4As shown, the vertical tube indirect air-water heat exchanger b9 and the vertical tube indirect air-water heat exchanger a5 have the same structure, both including a water collector 24 and a water distributor 27 which are symmetrically arranged in the upper and lower parts, a plurality of vertical metal tubes 26 are connected between the water collector 24 and the water distributor 27, fins 25 are inserted into the plurality of vertical metal tubes 26, and a water outlet 23 and a water inlet 28 are respectively provided on the water collector 24 and the water distributor 27, the water outlet 23 of the vertical tube indirect air-water heat exchanger b9 and the vertical tube indirect air-water heat exchanger a5 are commonly connected to the spray device a3, and the water inlet 28 of the vertical tube indirect air-water heat exchanger b9 and the vertical tube indirect air-water heat exchanger a5 are respectively connected to the water supply pipe b13 and the water supply pipe a12. A water supply pump 31 is installed on the water supply pipe 11. A circulating water pump b22 is installed at the junction where pipes G8 and G9 merge and connect to plate heat exchanger b15. A circulating water pump a20 is installed at the junction where pipes G4 and G2 merge and connect to the inlet of user terminal 21. Water valves a16, b17, c18, and 19 are installed on pipes G3, G2, G4, and G5, respectively.

[0025] The present invention provides an antifreeze year-round vertical indirect evaporative water chiller, the structure of which is as follows: Figure 2As shown, it includes a unit shell, an air inlet 29 is provided below the corresponding two side walls of the unit shell, a direct evaporative cooler is provided at the middle position of the unit shell, an exhaust port 30 is provided at the top of the unit shell corresponding to the position of the direct evaporative cooler, and the unit shell is symmetrically provided with ethylene glycol air cooler b8, vertical tube indirect air-water heat exchanger b9 and ethylene glycol air cooler a6, vertical tube indirect air-water heat exchanger a5 at the positions corresponding to the air inlet 29 on both sides of the direct evaporative cooler in accordance with the air inlet direction, and also includes a plate provided on the outside of the unit shell. Plate heat exchanger a14, plate heat exchanger b15, and user terminal 21. Plate heat exchangers a14 and b15 each form a circulation loop with user terminal 21 via pipes. Plate heat exchanger a14 is also connected to the direct evaporative cooler via a water supply pipe 11. Plate heat exchanger b15 also forms a circulation loop with glycol air cooler a6 and glycol air cooler b8 via pipes. Vertical tube indirect air-water heat exchanger b9 and vertical tube indirect air-water heat exchanger a5 are also connected to plate heat exchanger a14 via water supply pipes b13 and a12, respectively. The direct evaporative cooler includes a packing 4 located in the center of the unit casing, above the air inlet 29. Above the packing 4, from bottom to top, are a spray device a3, a water baffle 2, and an exhaust fan 1. It also includes a water tank 7 located at the bottom of the unit casing and connected to the plate heat exchanger a14 via a water supply pipe 11. The plate heat exchanger a14 is connected to the inlet of the user terminal 21 through the pipe G2, and the outlet of the user terminal 21 is connected to the plate heat exchanger a14 through the pipe G3. The plate heat exchanger b15 is connected to the inlet of the user terminal 21 through the pipe G2 through the pipe G4, and the outlet of the user terminal 21 is connected to the plate heat exchanger b15 through the pipe G5. The inlets of the glycol air cooler a6 and the glycol air cooler b8 are connected to the plate heat exchanger b15 through the pipe G6 and the pipe G7 respectively. The outlets of the glycol air cooler a6 and the glycol air cooler b8 are connected to the plate heat exchanger b15 through the pipe G8 and the pipe G9 respectively. Figure 3-4As shown, the vertical tube indirect air-water heat exchanger b9 and the vertical tube indirect air-water heat exchanger a5 have the same structure, both including a water collector 24 and a water distributor 27 which are symmetrically arranged in the upper and lower parts, a plurality of vertical metal tubes 26 are connected between the water collector 24 and the water distributor 27, fins 25 are inserted into the plurality of vertical metal tubes 26, and a water outlet 23 and a water inlet 28 are respectively provided on the water collector 24 and the water distributor 27, the water outlet 23 of the vertical tube indirect air-water heat exchanger b9 and the vertical tube indirect air-water heat exchanger a5 are commonly connected to the spray device a3, and the water inlet 28 of the vertical tube indirect air-water heat exchanger b9 and the vertical tube indirect air-water heat exchanger a5 are respectively connected to the water supply pipe b13 and the water supply pipe a12. A water supply pump 31 is installed on the water supply pipe 11. A circulating water pump b22 is installed at the junction where pipes G8 and G9 merge and connect to plate heat exchanger b15. A circulating water pump a20 is installed at the junction where pipes G4 and G2 merge and connect to the inlet of user terminal 21. Water valves a16, b17, c18, and 19 are installed on pipes G3, G2, G4, and G5, respectively.

[0026] The working principle of the antifreeze year-round vertical indirect evaporative chiller of the present invention is as follows:

[0027] 1) Working process of the unit above zero degrees:

[0028] Water valve a16 and water valve b17 are open, water valve c18 and water valve d19 are closed, circulating water pump a20 is turned on, circulating water pump b22 is turned off, and the ethylene glycol air cooler is not running.

[0029] The outdoor air passes through the vertical tube indirect air-water heat exchanger a5 and the vertical tube indirect air-water heat exchanger b9 and then enters the filler 4 to exchange heat and moisture with the water. Then, it is discharged to the outside through the exhaust fan 1. The cooled cold water enters the water tank 7. There are two ways to get the cold water in the water tank 7. The first way is as follows: Figure 1 As shown, part of the water is transported to the vertical tube indirect air-water heat exchanger a5 and the vertical tube indirect air-water heat exchanger b9 to exchange heat with the outdoor air and then to the spray device a3 for spraying. The other part is transported to the plate heat exchanger 14 through the water supply pump 11 to exchange heat with the return water from the user terminal 21 and then to the spray device b10 for spraying. In the second case, as Figure 2 As shown, all cold water is delivered to the plate heat exchanger 14 by the water supply pump 11 for heat exchange with the return water from the user terminal 21. It then exchanges heat with the outdoor air through the vertical tube indirect air-water heat exchanger a5 and the vertical tube indirect air-water heat exchanger b9 before being sprayed by the spray device a3. The return water from the user terminal 21 is cooled by heat exchange with the cold water in the plate heat exchanger 14 and then delivered to the user terminal 21 by the circulating water pump a20 to absorb the user's heat, thus completing the cycle.

[0030] 2) Working process of the unit above zero degrees:

[0031] Water valve a16 and water valve b17 are closed, water valve c18 and water valve d19 are opened, circulating water pump a20 is turned on, circulating water pump b22 is turned on, water supply pump 11 is turned off, and only the ethylene glycol air cooler system is running.

[0032] Outdoor air below zero degrees Celsius passes through the ethylene glycol air cooler a6 and the ethylene glycol air cooler b8 for heat exchange under the action of the exhaust fan 1. The cooled ethylene glycol solution is transported to the plate heat exchanger 15 by the action of the circulating water pump b22 for heat exchange with the return water from the user terminal 21, and then returns to the ethylene glycol air cooler a6 and the ethylene glycol air cooler b8 for heat exchange and cooling, thus completing the cycle. The return water from the user terminal 21 is cooled by the heat exchange with the ethylene glycol solution in the plate heat exchanger 15, and then transported to the user terminal 21 by the action of the circulating water pump a20 to absorb the user's heat, thus completing the cycle.

Claims

1. A year-round vertical indirect evaporative chiller with antifreeze function, characterized in that: The invention comprises a unit shell, wherein air inlets (29) are provided below the corresponding two side walls of the unit shell, a direct evaporative cooler is provided at a middle position in the unit shell, an exhaust port (30) is provided at a position corresponding to the direct evaporative cooler on the top of the unit shell, and glycol air coolers b (8), vertical tube indirect air-water heat exchangers b (9), glycol air coolers a (6), and vertical tube indirect air-water heat exchangers a (5) are symmetrically provided at positions corresponding to the air inlet (29) on both sides of the direct evaporative cooler in the unit shell according to the air inlet direction, and the unit shell also comprises a plate-type heat exchanger provided outside the unit shell. Heat exchanger a (14), plate heat exchanger b (15) and user terminal (21), the plate heat exchanger a (14), plate heat exchanger b (15) and user terminal (21) are connected to form a circulation loop through a pipeline, the plate heat exchanger a (14) is also connected to the direct evaporative cooler through a pipeline, the plate heat exchanger b (15) is also connected to the glycol air cooler a (6) and the glycol air cooler b (8) through a pipeline to form a circulation loop, the vertical tube indirect air-water heat exchanger b (9), the vertical tube indirect air-water heat exchanger a (5) and the direct evaporative cooler are also connected to form a circulation loop through a pipeline; The direct evaporative cooler comprises a filler (4) located above the air inlet (29) in the middle of the unit shell, a spray device a (3), a spray device b (10), a water baffle (2) and an exhaust fan (1) are sequentially arranged above the filler (4) from bottom to top, and further comprises a water tank (7) arranged at the bottom of the unit shell, the water tank (7) being connected to the plate heat exchanger a (14), the vertical tube indirect air-water heat exchanger a (5) and the vertical tube indirect air-water heat exchanger b (9) through a water supply pipe (11), a water supply pipe a (12) and a water supply pipe b (13) respectively, the plate heat exchanger a (14) being further connected to the spray device b (10) through a pipe G1, and the outlets of the vertical tube indirect air-water heat exchanger a (5) and the vertical tube indirect air-water heat exchanger b (9) being connected to the spray device a (3) in common; The working process of the unit above zero degrees is as follows: The outdoor air passes through the vertical tube indirect air-water heat exchanger a (5) and the vertical tube indirect air-water heat exchanger b (9) for wet cooling and then enters the packing (4) to exchange heat and moisture with the sprinkler water and then is discharged to the outside through the exhaust fan (1). The cooled cold water enters the water tank (7); part of the cold water in the water tank (7) is transported to the vertical tube indirect air-water heat exchanger a (5) and the vertical tube indirect air-water heat exchanger b (9) to exchange heat with the outdoor air and then to the spraying device a (3) for spraying, and the other part is transported to the plate heat exchanger (14) through the water supply pipe (11) to exchange heat with the return water from the user terminal (21) and then to the spraying device b (10) for spraying.

2. A year-round vertical indirect evaporative chiller with antifreeze function, characterized in that: The invention comprises a unit shell, wherein air inlets (29) are provided below the corresponding two side walls of the unit shell, a direct evaporative cooler is provided at a middle position in the unit shell, an exhaust port (30) is provided at a position corresponding to the direct evaporative cooler on the top of the unit shell, and glycol air coolers b (8), vertical tube indirect air-water heat exchangers b (9), glycol air coolers a (6), and vertical tube indirect air-water heat exchangers a (5) are symmetrically provided at positions corresponding to the air inlet (29) on both sides of the direct evaporative cooler in the unit shell according to the air inlet direction, and the unit shell also comprises a plate heat exchanger a (14), a plate heat exchanger b (15) and a plate heat exchanger b (16) provided outside the unit shell. Heat exchanger b (15) and user terminal (21), the plate heat exchanger a (14), the plate heat exchanger b (15) and the user terminal (21) are respectively connected to form a circulation loop through a pipeline, the plate heat exchanger a (14) is also connected to the direct evaporative cooler through a water supply pipe (11), the plate heat exchanger b (15) is also connected to the glycol air cooler a (6) and the glycol air cooler b (8) through pipelines to form a circulation loop, the vertical tube indirect air-water heat exchanger b (9) and the vertical tube indirect air-water heat exchanger a (5) are also connected to the plate heat exchanger a (14) through a water supply pipe b (13) and a water supply pipe a (12) respectively; The direct evaporative cooler comprises a filler (4) located above the air inlet (29) in the middle of the unit housing, a spray device a (3), a water baffle (2) and an exhaust fan (1) being arranged in order from bottom to top above the filler (4), and a water tank (7) arranged at the bottom of the unit housing, the water tank (7) being connected to the plate heat exchanger a (14) via a water supply pipe (11); The working process of the unit above zero degrees is as follows: The outdoor air passes through the vertical tube indirect air-water heat exchanger a (5) and the vertical tube indirect air-water heat exchanger b (9) and is then wet-cooled before entering the packing (4) to exchange heat and moisture with the sprinkler water and then be discharged outdoors through the exhaust fan (1). The cooled cold water enters the water tank (7); all the cold water in the water tank (7) is transported to the plate heat exchanger (14) under the action of the water supply pipe (11) to exchange heat with the return water from the user terminal (21) and then passes through the vertical tube indirect air-water heat exchanger a (5) and the vertical tube indirect air-water heat exchanger b9 to exchange heat with the outdoor air and then to the spraying device a (3) for spraying. The return water from the user terminal (21) is cooled by heat exchange with the cold water in the plate heat exchanger (14) and then transported to the user terminal (21) to absorb the user's heat, thus circulating.

3. The antifreeze year-round vertical indirect evaporative chiller according to claim 1 or 2, characterized in that: The plate heat exchanger a (14) is connected to the inlet of the user terminal (21) through a pipeline G2, and the outlet of the user terminal (21) is connected to the plate heat exchanger a (14) through a pipeline G3; The plate heat exchanger b (15) is connected to the inlet of the user terminal (21) through the pipeline G4 and the pipeline G2, and the outlet of the user terminal (21) is connected to the plate heat exchanger b (15) through the pipeline G5. The inlets of the glycol air cooler a (6) and the glycol air cooler b (8) are connected to the plate heat exchanger b (15) after being respectively connected through the pipeline G6 and the pipeline G7. The outlets of the glycol air cooler a (6) and the glycol air cooler b (8) are connected to the plate heat exchanger b (15) after being respectively connected through the pipeline G8 and the pipeline G9.

4. The antifreeze year-round vertical indirect evaporative chiller according to claim 3, characterized in that: The vertical tube indirect air-water heat exchanger b (9) and the vertical tube indirect air-water heat exchanger a (5) have the same structure, both comprising a water collector (24) and a water distributor (27) symmetrically arranged in an upper and lower direction, a plurality of vertical metal tubes (26) are connected between the water collector (24) and the water distributor (27), fins (25) are inserted into the plurality of vertical metal tubes (26), and the water collector (24) and the water distributor (27) are connected to each other. A water outlet (23) and a water inlet (28) are respectively provided, the water outlets (23) of the vertical tube indirect air-water heat exchanger b (9) and the vertical tube indirect air-water heat exchanger a (5) are commonly connected to the spray device a (3), and the water inlets (28) of the vertical tube indirect air-water heat exchanger b (9) and the vertical tube indirect air-water heat exchanger a (5) are respectively connected to the water supply pipe b (13) and the water supply pipe a (12).

5. The antifreeze year-round vertical indirect evaporative chiller according to claim 4, characterized in that: A water supply pump (31) is provided on the water supply pipe (11), a circulating water pump b (22) is provided at the connection point where the pipes G8 and G9 are combined and connected to the plate heat exchanger b (15), and a circulating water pump a (20) is provided at the connection point where the pipes G4 and G2 are combined and connected to the inlet of the user terminal (21).

6. The antifreeze year-round vertical indirect evaporative chiller according to claim 5, characterized in that: The pipeline G3, pipeline G2, pipeline G4 and pipeline G5 are respectively provided with a water valve a (16), a water valve b (17), a water valve c (18) and a water valve (19).

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