Closed indirect evaporative cooling refrigeration water device

Abstract

The utility model discloses a closed indirect evaporative cooling refrigeration water device which comprises a main shell, an auxiliary shell, a net-shaped filler, a surface air cooler, a heat exchange coil pipe, a main spraying system, a pre-cooling pipeline and an auxiliary spraying system. A spraying water collecting tank is arranged at the bottom of the main shell; the auxiliary shell is arranged on the side wall of the main shell, and an auxiliary fan is arranged at the top; the net-shaped filler is arranged in the main shell; the surface air cooler is arranged below the auxiliary fan, and a water inlet of the surface air cooler is communicated with a water outlet of a circulating high-temperature water pipeline to be cooled; the heat exchange coil pipe is arranged below the net-shaped filler, a water inlet of the heat exchange coil pipe is communicated with a water outlet of the surface air cooler, and a water outlet of the heat exchange coil pipe is communicated with a water outlet of the circulating low-temperature water pipeline; the main spraying system sprays water in the spraying water collecting tank above the net-shaped filler; the precooling pipeline is arranged below the surface air cooler; the auxiliary spraying system sprays water in the spraying water collecting tank to the position above the precooling pipeline. By adopting a closed structure, the water quality of circulating water is ensured, and the pipeline is prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling equipment, in particular to a closed indirect evaporative cooling refrigerated water device. Background Art

[0002] The device for producing chilled water by indirect evaporative cooling is a commonly used device in the refrigeration technology field and the cooling equipment technology field. The chilled water produced by the existing indirect evaporative cooling chilled water device directly contacts the air in the atmosphere. Since the air contains dust and sand, the quality of the produced chilled water cannot be guaranteed. At the same time, the produced chilled water directly evaporates and concentrates in the device, which is prone to scaling and blocking the process equipment. The device and the process equipment need to be repaired frequently and tediously, which even affects the operation of the process equipment and leads to production suspension, resulting in great economic losses. Content of the Utility Model

[0003] In order to overcome the problems existing in the related art, the utility model provides a closed indirect evaporative cooling refrigerated water device that ensures water quality.

[0004] According to the first aspect of the embodiment of the utility model, a closed indirect evaporative cooling refrigerated water device is provided, including: a main housing, a secondary housing, a mesh packing, a surface cooler, a heat exchange coil, a main spraying system, a precooling pipe and a secondary spraying system. The inside of the main housing is hollow to form a main cooling chamber, and a main air outlet is arranged at the top. A main fan is arranged at the main air outlet. A first main air inlet is arranged on the side wall of the main housing. A spraying water collecting tank is arranged at the bottom of the main cooling chamber. The secondary housing is arranged on the side wall of the main housing where the first main air inlet is arranged. The inside of the secondary housing is hollow to form a secondary cooling chamber. A secondary air outlet is arranged at the top of the secondary housing. A secondary fan is arranged at the secondary air outlet. A second main air inlet and a secondary air inlet are arranged on the side wall of the secondary housing opposite to the first main air inlet. The mesh packing is arranged in the main cooling chamber for dispersing the liquid sprayed thereon. The surface cooler is arranged below the secondary fan in the secondary cooling chamber, and the water inlet of the surface cooler is communicated with the water outlet of the circulating high-temperature water pipe to be cooled. The heat exchange coil is arranged in the main cooling chamber and below the mesh packing. The water inlet of the heat exchange coil is communicated with the water outlet of the surface cooler, and the water outlet of the heat exchange coil is communicated with the water outlet of the circulating low-temperature water pipe. The main spraying system is communicated with the spraying water collecting tank for spraying the water in the spraying water collecting tank above the mesh packing. The precooling pipe is arranged in the secondary cooling chamber and below the surface cooler for cooling and precooling the air in the secondary cooling chamber. The secondary spraying system is communicated with the main spraying system for spraying the water in the spraying water collecting tank above the water inlet of the precooling pipe.

[0005] Optionally, according to another aspect of the embodiments of the present utility model, a first pre-cooling pipe and a second pre-cooling pipe are arranged up and down and spaced apart by a predetermined distance in the auxiliary cooling chamber; the auxiliary air inlet is arranged between the first pre-cooling pipe and the second pre-cooling pipe; a first water collecting tray is arranged at the top of the first pre-cooling pipe, and the first water collecting tray is used for converging and guiding the sprayed water from the auxiliary spraying system into the first pre-cooling pipe; a second water collecting tray is arranged at the top of the second pre-cooling pipe, and the second water collecting tray is used for converging and guiding the water flowing out of the first pre-cooling pipe into the second pre-cooling pipe, and the bottom of the second pre-cooling pipe is communicated with the spraying water collecting tank.

[0006] Optionally, according to another aspect of the embodiments of the present utility model, an air volume regulating device is arranged at the auxiliary air inlet, and the air volume regulating device is a louver.

[0007] Optionally, according to another aspect of the embodiments of the present utility model, a pair of opposite side walls of the main housing are respectively provided with the first main air inlets; the auxiliary housing includes a first auxiliary housing and a second auxiliary housing, a first auxiliary cooling chamber is formed by hollowing out the inside of the first auxiliary housing, and a second auxiliary cooling chamber is formed by hollowing out the inside of the second auxiliary housing; the first auxiliary housing and the second auxiliary housing are respectively abutted against the two side walls of the main housing provided with the first main air inlets; the surface cooler and the pre-cooling pipe are arranged in both the first auxiliary cooling chamber and the second auxiliary cooling chamber.

[0008] Optionally, according to another aspect of the embodiments of the present utility model, the mesh packing adopts an embedded grid low-resistance packing.

[0009] Optionally, according to another aspect of the embodiments of the present utility model, the main fan is used to draw air flow to form a main air duct, and the air flow in the main air duct sequentially passes through the auxiliary cooling chamber, the pre-cooling pipe, the first main air inlet, the main cooling chamber, the heat exchange coil, the mesh packing and the main air outlet.

[0010] Optionally, according to another aspect of the embodiments of the present utility model, the auxiliary fan is used to draw air flow to form an auxiliary air duct, and the air flow in the auxiliary air duct sequentially passes through the auxiliary air inlet, the pre-cooling pipe, the surface cooler and the auxiliary air outlet.

[0011] Optionally, according to another aspect of the embodiments of the present utility model, the main spraying system includes a main spraying pipe and a spraying pump arranged on the main spraying pipe, the main spraying pipe is provided with main spray heads, and the main spraying ports are arranged above the mesh packing.

[0012] Optionally, according to another aspect of the embodiments of the present invention, the secondary spray system includes a secondary spray pipe, the main spray pipe is provided with secondary spray heads, and the secondary spray heads are arranged above the pre-cooling pipe.

[0013] Optionally, according to another aspect of the embodiments of the present invention, the closed indirect evaporative cooling chilled water device further includes a water collector, and the water collector is arranged in the main cooling chamber and located between the main air outlet and the mesh packing.

[0014] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects: The present invention adopts a closed structure, and the high-temperature circulating water to be cooled is circulated in a closed manner within the surface cooler and the heat exchange coil, so that the high-temperature circulating water to be cooled is separated from the spray cooling water. Compared with the prior art, low-temperature circulating water close to the wet-bulb temperature is provided. For every 1°C reduction in water temperature, the system operation energy consumption can be reduced by 3%-5%. At the same time, the quality of the high-temperature circulating water is ensured, preventing the high-temperature circulating water from causing pipeline blockage due to participating in the spraying process, and extending the service life of the high-temperature circulating water pipeline and the equipment connected thereto.

[0015] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. Description of the Drawings

[0016] The drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments in line with the present invention, and are used together with the specification to explain the principles of the present invention.

[0017] Figure 1 is a front view schematic diagram of the overall structure of a closed indirect evaporative cooling chilled water device shown according to an exemplary embodiment;

[0018] Figure 2 is a side view schematic diagram of the overall structure of a closed indirect evaporative cooling chilled water device shown according to an exemplary embodiment;

[0019] Reference Numerals:

[0020] 1, main housing; 11, main cooling chamber; 12, main air outlet; 13, first main air inlet; 14, spray water collection tank; 15, main fan;

[0021] 2, secondary housing; 21, secondary cooling chamber; 22, secondary air outlet; 23, secondary fan; 24, second main air inlet; 25, secondary air inlet;

[0022] 3, mesh packing; 4, surface cooler; 5, heat exchange coil; 6, main spray system; 8, secondary spray system

[0023] 7. Pre-cooling pipeline; 71. First pre-cooling pipeline; 72. Second pre-cooling pipeline; 9. Water collector. Detailed implementation mode

[0024] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation modes described in the following exemplary embodiments do not represent all implementation modes consistent with the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0025] In the prior art, under the transportation of a circulating water pump, high-temperature circulating return water is sprayed from the water distribution system at the top of the device onto the packing, and evaporative heat exchange is carried out with the air flow inside the packing. The temperature of the circulating water decreases and becomes low-temperature circulating water. The circulating water converges into the water collecting tank at the bottom of the device under the action of gravity. Most of the circulating water is transported to the process equipment through the circulating water pump for heat exchange and the temperature rises, and the cycle continues. A small part of the circulating water is transported to the pre-cooling section at the air inlet position of the device through the spray water pump of the device for heat exchange with the air flow. The temperature of the air flow decreases, and the air flow with reduced temperature conducts evaporative heat exchange with the circulating water inside the packing, thereby providing low-temperature cold water. Since the circulating water is in direct contact with the air flow and evaporates and concentrates, the quality of the circulating water deteriorates and becomes dirty, and it is easy to scale, block the pipelines and process equipment, resulting in a large amount of maintenance work, high costs, and troublesome management and operation.

[0026] Figure 1 is a front view schematic diagram of the overall structure of a closed indirect evaporative cooling refrigerated water device shown according to an exemplary embodiment; Figure 2 is a side view schematic diagram of the overall structure of a closed indirect evaporative cooling refrigerated water device shown according to an exemplary embodiment.

[0027] As Figure 1-2 shown, in this embodiment, the closed indirect evaporative cooling refrigerated water device includes: a main housing 1, a secondary housing 2, a mesh packing 3, a surface cooler 4, a heat exchange coil 5, a main spray system 6, a pre-cooling pipeline 7, and a secondary spray system 8.

[0028] Among them, the inside of the main housing 1 is hollow to form a main cooling chamber 11. A main air outlet 12 is provided at the top, a main fan 15 is provided at the main air outlet 12, a first main air inlet 13 is provided on the side wall of the main housing 1, and a spray water collecting tank 14 is provided at the bottom of the main cooling chamber 11.

[0029] The secondary outer shell 2 is arranged on the side wall of the main outer shell 1 where the first main air inlet 13 is located. The interior of the secondary outer shell 2 is hollow to form a secondary cooling chamber 21. A secondary air outlet 22 is provided at the top of the secondary outer shell 2, and a secondary fan 23 is arranged at the secondary air outlet 22. The side wall of the secondary outer shell 2 opposite to the first main air inlet is provided with a second main air inlet 24 and a secondary air inlet 25.

[0030] The mesh packing 3 is arranged in the main cooling chamber 11 for dispersing the liquid sprayed thereon.

[0031] The surface cooler 4 is arranged below the secondary fan 23 in the secondary cooling chamber 21, and the water inlet of the surface cooler 4 is communicated with the water outlet of the circulating high-temperature water pipeline to be cooled.

[0032] The heat exchange coil 5 is arranged in the main cooling chamber 11 and below the mesh packing 3. The water inlet of the heat exchange coil 5 is communicated with the water outlet of the surface cooler 4, and the water outlet of the heat exchange coil 5 is communicated with the water inlet of the circulating low-temperature water pipeline.

[0033] The main spray system 6 is communicated with the spray water collection tank 14 for spraying the water in the spray water collection tank 14 above the mesh packing 3.

[0034] The pre-cooling pipeline 7 is arranged in the secondary cooling chamber 21 and below the surface cooler 4 for cooling and pre-cooling the air in the secondary cooling chamber 21.

[0035] The secondary spray system 8 is communicated with the main spray system 6 for spraying the water in the spray water collection tank 14 above the water inlet of the pre-cooling pipeline 7.

[0036] The main fan is used to draw air flow to form a main air duct, and the air flow in the main air duct flows through the pre-cooling pipeline, the heat exchange coil, and the mesh packing to cool the water in the pre-cooling pipeline, the heat exchange coil, and the mesh packing by air cooling;

[0037] The secondary fan is used to draw air flow to form a secondary air duct, and the air flow in the secondary air duct flows through the pre-cooling pipeline and the surface cooler to cool the pre-cooling pipeline and the surface cooler by water-air cooling.

[0038] The cooling process of this embodiment is as follows:

[0039] The circulating high-temperature water to be cooled enters the surface cooler in the secondary cooling chamber from the water inlet of the surface cooler for the first cooling, i.e., pre-cooling, and then enters the heat exchange coil in the main cooling chamber through the water outlet of the surface cooler. When flowing through the heat exchange coil, the water in the heat exchange coil is cooled for the second time, and after cooling, low-temperature water is formed. Finally, the low-temperature water flows out from the water outlet of the heat exchange coil to complete the cooling.

[0040] Among them, the principle of the first cooling is to use the secondary fan, secondary spray system and pre-cooling pipeline in the secondary cooling chamber to cool the air in the secondary cooling chamber by water cooling and air cooling respectively. Specifically, the surface cooler dissipates the high-temperature water inside the surface cooler to the secondary cooling chamber through the fins. Since there is a pre-cooling pipeline below the surface cooler in the secondary cooling chamber, and a low-temperature liquid sprayed by the secondary spray system flows in the pre-cooling pipeline to cool the air in the secondary cooling chamber by water cooling. There is also a secondary fan in the secondary cooling chamber, and the secondary fan draws the air flow through the pre-cooling pipeline and the surface cooler for air cooling.

[0041] The principle of the second cooling is to use the main fan in the main cooling chamber to cool the air in the main cooling chamber by air cooling and use the main spray system and the mesh packing to cool the heat exchange coil by water cooling. Specifically, the main fan draws the air flow through the pre-cooling pipeline, the heat exchange coil and the mesh packing to cool the water in the pre-cooling pipeline, the heat exchange coil and the mesh packing by air cooling. The low-temperature liquid sprayed by the main spray system flows through the packing and then is sprayed onto the heat exchange coil through the packing, so as to cool the high-temperature water in the heat exchange coil by water-cooled evaporation and heat absorption.

[0042] The beneficial effects of this embodiment are:

[0043] The utility model adopts a closed structure, and the high-temperature circulating water to be cooled is enclosed and circulated in the surface cooler and the heat exchange coil, so that the high-temperature circulating water to be cooled is separated from the spray cooling water. Compared with the prior art, the quality of the high-temperature circulating water is guaranteed, the pipeline blockage caused by the participation of the high-temperature circulating water in the spraying process is prevented, the service life of the high-temperature circulating water pipeline and the equipment connected thereto is prolonged, the operation and maintenance cost is low, and the operation is simple.

[0044] Under the action of the secondary fan, the low-temperature air flow in the riser of the pre-cooling section of the evaporative cooling device directly cools the high-temperature return water of the circulating water first, fully utilizes the cold source, improves the heat exchange effect, and can play a role in "eliminating white" and preventing freezing in winter.

[0045] In another embodiment of the utility model, on the basis of the above embodiment, there are a first pre-cooling pipeline 71 and a second pre-cooling pipeline 72 which are arranged up and down and are spaced apart by a predetermined distance in the secondary cooling chamber 21. The secondary air inlet 25 is arranged between the first pre-cooling pipeline 71 and the second pre-cooling pipeline 72. A first water collecting tray is arranged at the top of the first pre-cooling pipeline 71, and the first water collecting tray is used for converging and guiding the spray water sprayed by the secondary spray system into the first pre-cooling pipeline 71. A second water collecting tray is arranged at the top of the second pre-cooling pipeline 72, and the second water collecting tray is used for converging and guiding the water flowing out of the first pre-cooling pipeline 72 into the second pre-cooling pipeline 72. The bottom of the second pre-cooling pipeline is communicated with the spray water collecting tank 14. The secondary air inlet 25 is provided with a air volume regulating device, and the air volume regulating device is a louver.

[0046] A further beneficial effect of this embodiment is that by adopting a segmented pre-cooling section structure, an auxiliary fan is added to strengthen the evaporative cooling capacity in the pre-cooling section. At the same time, through the middle air inlet louvers in the pre-cooling section, the air flow ratio in the upper and lower pre-cooling sections is adjusted and optimized, improving the heat exchange effect in the pre-cooling section and making full use of natural cold sources.

[0047] In another embodiment of the present utility model, on the basis of the above embodiment, a pair of opposite side walls of the main housing 1 are respectively provided with first main air inlets 13; the auxiliary housing 2 includes a first auxiliary housing and a second auxiliary housing. The interior of the first auxiliary housing is hollow to form a first auxiliary cooling chamber, and the interior of the second auxiliary housing is hollow to form a second auxiliary cooling chamber; the first auxiliary housing and the second auxiliary housing are respectively abutted against the two side walls of the main housing 1 provided with the first main air inlets 13; surface coolers 4 and pre-cooling pipes 7 are arranged in both the first auxiliary cooling chamber and the second auxiliary cooling chamber.

[0048] In another embodiment of the present utility model, on the basis of the above embodiment, the mesh packing 3 adopts an embedded grid low-resistance packing.

[0049] In another embodiment of the present utility model, on the basis of the above embodiment, the main fan 15 is used to draw air flow to form a main air duct, and the air flow in the main air duct sequentially passes through the auxiliary cooling chamber 21, the pre-cooling pipe 7, the first main air inlet 13, the main cooling chamber 11, the heat exchange coil 5, the mesh packing 3 and the main air outlet 12.

[0050] In another embodiment of the present utility model, on the basis of the above embodiment, the auxiliary fan 23 is used to draw air flow to form an auxiliary air duct, and the air flow in the auxiliary air duct sequentially passes through the auxiliary air inlet 25, the pre-cooling pipe 7, the surface cooler 4 and the auxiliary air outlet 22.

[0051] In another embodiment of the present utility model, on the basis of the above embodiment, the main spray system 6 includes a main spray pipe and a spray pump arranged on the main spray pipe. The main spray pipe is provided with main spray heads, and the main spray heads are arranged above the mesh packing 3.

[0052] In another embodiment of the present utility model, on the basis of the above embodiment, the auxiliary spray system 8 includes an auxiliary spray pipe. The main spray pipe is provided with auxiliary spray heads, and the auxiliary spray heads are arranged above the pre-cooling pipe 7.

[0053] In another embodiment of the present utility model, on the basis of the above embodiment, the closed indirect evaporative cooling refrigerated water device further includes a water collector 9. The water collector 9 is arranged in the main cooling chamber 11 and is located between the main air outlet 12 and the mesh packing 3.

[0054] It can be understood that in the present utility model, "a plurality of" means two or more, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The singular forms of "a", "an", and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0055] Furthermore, it can be understood that the terms "first", "second", etc. are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other and do not represent a specific order or degree of importance. In fact, the expressions such as "first" and "second" can be used interchangeably completely. For example, without departing from the scope of the present utility model, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0056] Furthermore, it can be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present embodiment and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0057] Furthermore, it can be understood that unless otherwise specified, "connection" includes direct connection between the two without other components therebetween, and also includes indirect connection between the two with other elements therebetween.

[0058] Furthermore, it can be understood that although the operations are described in a specific order in the drawings in the embodiments of the present utility model, it should not be understood as requiring these operations to be performed in the specific order shown or in a serial order, or requiring all the operations shown to obtain the desired result. In a specific environment, multitasking and parallel processing may be advantageous.

[0059] Those skilled in the art will readily think of other embodiments of the present utility model after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present utility model, which follow the general principles of the present utility model and include the common general knowledge or conventional technical means in the technical field not disclosed in the present utility model. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present utility model are pointed out by the following claims.

[0060] It should be understood that the present utility model is not limited to the exact structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present utility model is only limited by the appended claims.

Claims

1. A closed indirect evaporative cooling refrigeration water device, characterized in that: include: A main shell (1) is hollow inside to form a main cooling chamber (11), a main air outlet (12) is arranged on the top, a main fan (15) is arranged at the main air outlet (12), a first main air inlet (13) is arranged on the side wall of the main shell (1), and a spray water collection tank (14) is arranged at the bottom of the main cooling chamber (11); A secondary shell (2) is arranged on a side wall of the main shell (1) provided with the first main air inlet (13); the interior of the secondary shell (2) is hollow to form a secondary cooling chamber (21); a secondary air outlet (22) is arranged on the top of the secondary shell (2); a secondary fan (23) is arranged at the secondary air outlet (22); a second main air inlet (24) and a secondary air inlet (25) are arranged on the side wall of the secondary shell (2) opposite to the first main air inlet (13); A mesh filler (3) is arranged in the main cooling chamber (11) and is used to disperse the liquid sprayed thereon; A surface cooler (4) is arranged below the auxiliary fan (23) in the auxiliary cooling chamber (21), and a water inlet of the surface cooler (4) is connected to a water outlet of a circulating high-temperature water pipeline to be cooled; A heat exchange coil (5) is arranged in the main cooling chamber (11) and below the mesh filler (3), the water inlet of the heat exchange coil (5) is connected to the water outlet of the surface cooler (4), and the water outlet of the heat exchange coil (5) is connected to the water outlet of the circulating low-temperature water pipeline; A main spraying system (6), connected to the spraying water collecting tank (14), for spraying the water in the spraying water collecting tank (14) onto the mesh filler (3); A precooling pipe (7), arranged in the auxiliary cooling chamber (21) and located below the surface cooler (4), for precooling the air in the auxiliary cooling chamber (21); The auxiliary spray system (8) is connected to the main spray system (6) and is used to spray the water in the spray water collection tank (14) onto the water inlet above the precooling pipe (7).

2. The closed indirect evaporative cooling refrigeration water device according to claim 1, characterized in that: The auxiliary cooling chamber (21) has a first precooling pipe (71) and a second precooling pipe (72) arranged vertically and spaced apart from each other by a predetermined distance; The auxiliary air inlet (25) is arranged between the first precooling pipe (71) and the second precooling pipe (72); A first water collecting tray is arranged at the top of the first precooling pipe (71), and the first water collecting tray is used to collect the spray water sprayed by the auxiliary spray system and guide it to flow into the first precooling pipe (71); A second water collecting tray is arranged at the top of the second precooling pipe (72), and the second water collecting tray is used to collect water flowing out of the first precooling pipe (71) and guide it to flow into the second precooling pipe (72). The bottom of the second precooling pipe is connected to the spray water collecting tank (14).

3. The closed indirect evaporative cooling refrigeration water device according to claim 1, characterized in that: The auxiliary air inlet (25) is provided with an air volume regulating device, and the air volume regulating device is a shutter.

4. The closed indirect evaporative cooling refrigeration water device according to claim 1, characterized in that: A pair of opposite side walls of the main housing (1) are respectively provided with the first main air inlet (13); The sub-shell (2) comprises a first sub-shell and a second sub-shell, the first sub-shell is hollow inside to form a first sub-cooling chamber, and the second sub-shell is hollow inside to form a second sub-cooling chamber; The first sub-shell and the second sub-shell are respectively abutted against two side walls of the main shell (1) provided with the first main air inlet (13); The surface cooler (4) and the precooling pipe (7) are both provided in the first sub-cooling chamber and the second sub-cooling chamber.

5. The closed indirect evaporative cooling refrigeration water device according to claim 1, characterized in that: The mesh filler (3) is an embedded grid low-resistance filler.

6. The closed indirect evaporative cooling refrigeration water device according to claim 1, characterized in that: The main fan (15) is used to draw air flow to form a main air duct, and the air flow in the main air duct passes through the auxiliary cooling chamber (21), the precooling pipe (7), the first main air inlet (13), the main cooling chamber (11), the heat exchange coil (5), the mesh filler (3) and the main air outlet (12) in sequence.

7. The closed indirect evaporative cooling refrigeration water device according to claim 1, characterized in that: The auxiliary fan (23) is used to draw air flow to form an auxiliary air duct, and the air flow in the auxiliary air duct passes through the auxiliary air inlet (25), the precooling pipe (7), the surface cooler (4) and the auxiliary air outlet (22) in sequence.

8. The closed indirect evaporative cooling refrigeration water device according to claim 1, characterized in that: The main spray system (6) comprises a main spray pipe and a spray pump arranged on the main spray pipe, the main spray pipe is provided with a main spray head, and the main spray head is arranged above the mesh filler (3).

9. The closed indirect evaporative cooling refrigeration water device according to claim 8, characterized in that: The auxiliary spray system (8) comprises an auxiliary spray pipeline, the main spray pipeline is provided with an auxiliary spray head, and the auxiliary spray head is arranged above the precooling pipeline (7).

10. The closed indirect evaporative cooling refrigeration water device according to claim 1, characterized in that: The closed indirect evaporative cooling refrigeration water device also includes a water collector (9), which is arranged in the main cooling chamber (11) and located between the main air outlet (12) and the mesh filler (3).

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