CN214381941U

CN214381941U - Special indirect evaporative cooling modular air handling unit for machine room

Info

Publication number: CN214381941U
Application number: CN202120047666.8U
Authority: CN
Inventors: 于向阳
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-10-08
Anticipated expiration: 2031-01-08

Abstract

The utility model discloses a special indirect evaporative cooling modularization air treatment unit in computer lab, constitute by cold source device and air treatment device, the cold source device is the evaporation refrigeration section, its structure is setting up the filler in the incasement, the top of filler is setting up air exhaust chamber and water distribution device, the below of filler is setting up circulating water tank, the lateral part of cold source device is setting up air treatment device, its structure is the air treatment chamber, high temperature surface cooler is setting up in the air treatment chamber, air inlet chamber and cold wind room are cut apart into to the air treatment chamber, the forced draught blower is being installed in the export of cold wind room, circulating water tank's play water piping connection high temperature surface cooler, its outlet pipe connection water distribution device, high temperature surface cooler sets up circulating water tank that the long flowing water pipe is being connected. The utility model discloses rational in infrastructure, avoid the problem of interior cold type heat transfer core structure jam, corruption, reduce air conditioning equipment's area occupied, promote the heat exchange efficiency of unit, reduce the operation energy consumption of unit, solve the problem of preventing frostbite in winter and dewing.

Description

Special indirect evaporative cooling modular air handling unit for machine room

Technical Field

The utility model belongs to the air treatment equipment in heating and ventilating air conditioning field, especially a special indirect evaporative cooling modularization air treatment unit in computer lab.

Background

With the development of 5G technology, cloud computing and artificial intelligence, the development of data centers is faster and faster, and in order to reduce the energy consumption of the data centers, governments have also developed more and more severe energy-saving indexes, so that the reduction of the operation energy consumption of the data centers is not slow at all. In the operation energy consumption of the data center, the refrigeration accounts for 20% -30% of the operation energy consumption, so that the refrigeration energy consumption of the data center is reduced, and the PUE of the data center can be greatly reduced.

In order to reduce the energy consumption of an air conditioning system of a data center and shorten the construction period of the data center, most of common modularized air conditioning units at the present stage are internal-cooling type indirect evaporative cooling units, but the internal-cooling type indirect evaporative cooling units have the problems of scaling blockage, corrosion, dewing during operation in winter, large occupied area and the like of a heat exchange core, and when the internal-cooling type indirect evaporative cooling units are adopted, the problem of cold accumulation after power failure is difficult to solve, and an additional water storage tank is required to be arranged for water storage, so that the additional building area is occupied.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a special indirect evaporative cooling modularization air handling unit of computer lab, its is rational in infrastructure, can avoid the problem of interior cold type heat transfer core structure jam, corruption, reduces air conditioning equipment's area occupied, can promote the heat exchange efficiency of unit, reduces the operation energy consumption of unit, solves the problem of preventing frostbite in winter and dewing.

The purpose of the utility model is realized like this: an indirect evaporative cooling modular air handling unit special for a machine room, which consists of a cold source device and an air handling device, wherein the cold source device is an evaporation refrigeration section and is structurally characterized in that a filler is arranged in a machine box, an exhaust chamber provided with an exhaust fan and a water distribution device are sequentially arranged above the filler from top to bottom, a circulating water tank is arranged below the filler, an air treatment device is arranged on the side part of the cold source device, the structure is an air treatment chamber with an air return port, a high-temperature surface cooler with an air inlet surface provided with a filter screen is obliquely arranged in the air treatment chamber, the air treatment chamber is divided into an air inlet chamber and a cold air chamber, an air feeder is arranged on an outlet of the cold air chamber, a water outlet pipe of a circulating water tank is connected with an inlet of the high-temperature surface cooler through a high-temperature circulating water pump, the outlet pipe is connected with a water distribution device, and the high-temperature surface cooler is provided with a long water flowing pipe which is connected with a circulating water tank through arrangement.

The utility model discloses an indirect evaporative cooling air conditioning unit of outer cold type against the current, the indirect evaporative cooling unit principle of outer cold type against the current can prepare cold water for utilizing outdoor dry air, supply the surface cooler with cold water, utilize the return air in the surface cooler cooling chamber, interior cold type heat transfer core structure blocks up has been avoided, the problem of corruption, also be provided with water storage device and cold-storage device in the device of this patent in addition, utilize water among the water storage device to carry out the moisturizing after cutting off the water, cold water among the usable cold storage device supplies cold when having a power failure, the structural design who optimizes has been adopted, can effectual reduction air conditioning equipment's area occupied. The countercurrent packing is adopted for refrigeration, so that the heat exchange efficiency of the unit is greatly improved, and the operation energy consumption of the unit is effectively reduced.

The utility model discloses also solved the dewfall and the frost-proof problem of data center air conditioning system when operation winter, through increasing dry cold ware, utilize the antifreeze in the dry cold ware of outdoor low temperature air cooling winter, fundamentally solves the problem of preventing frostbite and dewfall winter.

The utility model discloses it is rational in infrastructure, avoided the problem of interior cold type heat transfer core structure jam, corruption, reduced air conditioning equipment's area occupied, promoted the heat exchange efficiency of unit, reduced the operation energy consumption of unit, solved the problem of preventing frostbite in winter and dewing.

Drawings

The present invention will be further described with reference to the accompanying drawings, wherein fig. 1 is a schematic structural view of embodiment 1 of the present invention, fig. 2 is a schematic structural view of embodiment 2 of the present invention, fig. 3 is a schematic structural view of embodiment 3 of the present invention, fig. 4 is a schematic structural view of embodiment 4 of the present invention, fig. 5 is a schematic structural view of embodiment 5 of the present invention, fig. 6 is a schematic structural view of embodiment 6 of the present invention, fig. 7 is a schematic structural view of embodiment 7 of the present invention, fig. 8 is a schematic structural view of embodiment 8 of the present invention, fig. 9 is a schematic structural view of embodiment 9 of the present invention, fig. 10 is a schematic structural view of embodiment 10 of the present invention, fig. 11 is a schematic structural view of embodiment 11 of the present invention, fig. 12 is a schematic structural view of embodiment 12 of the present invention, fig. 13 is a schematic structural view of embodiment 13 of the present invention, fig. 14 is a schematic structural view of embodiment 14 of the present invention, fig. 15 is the embodiment 15 of the utility model discloses a structural schematic diagram, fig. 16 are the utility model discloses embodiment 16 structural schematic diagram, fig. 17 are the utility model discloses embodiment 17 structural schematic diagram, fig. 18 do the utility model discloses an 18 structural schematic diagram, fig. 19 do the utility model discloses an 19 structural schematic diagram, fig. 20 are the utility model discloses an 20 structural schematic diagram, fig. 21 are the utility model discloses embodiment 21 structural schematic diagram, fig. 22 are the utility model discloses embodiment 22 structural schematic diagram, fig. 23 are the utility model discloses embodiment 23 structural schematic diagram, fig. 24 is the utility model discloses embodiment 24 structural schematic diagram, fig. 25 is the utility model discloses embodiment 25 structural schematic diagram, fig. 26 is the utility model discloses embodiment 26 structural schematic diagram.

Detailed Description

An indirect evaporative cooling modular air handling unit special for a machine room is composed of a cold source device and an air handling device, wherein the cold source device is an evaporative cooling section and is structurally characterized in that a filler 1 is arranged in a machine room, an exhaust chamber provided with an exhaust fan 2 and a water distribution device 3 are sequentially arranged above the filler 1 from top to bottom, a circulating water tank 4 is arranged below the filler 1, the air handling device is arranged on the side part of the cold source device and is structurally an air handling chamber with a return air inlet 7, a high-temperature surface air cooler 5 with an air inlet surface provided with a filter screen 6 is obliquely arranged in the air handling chamber, the air handling chamber is divided into an air inlet chamber and a cold air chamber, a water outlet pipe 9 is arranged on the outlet of the cold air chamber, the circulating water tank 4 is connected with the inlet of the high-temperature surface air cooler 5 through a high-temperature circulating water pump 10, and the outlet pipe of the circulating water tank is connected with the water distribution device 3, the high-temperature surface cooler 5 is provided with a long water flowing pipe 8 connected with the circulating water tank 4. The air conditioner consists of a cold source device and an air device, wherein the cold source device consists of an evaporation refrigeration section, an exhaust fan 2 and the like; wherein the evaporation refrigeration section consists of a circulating water tank 4, a filler 1 and a water distribution device 3; the air treatment device is composed of a high temperature surface cooler 5 and a blower 9. The exhaust fan 2 is arranged at the top of the evaporation refrigeration section, and the inlet of the exhaust fan 2 is communicated with the outlet of the filler 1 through an exhaust cavity; the air treatment device can be arranged at one side of the cold source device or separately arranged; the upper part of the air treatment device is provided with an air return opening 7, the air return opening 7 is communicated with the inlet of the high-temperature surface cooler 5, and the inlet of the air feeder 9 is communicated with the outlet of the high-temperature surface cooler 5. The circulating water tank 4 is communicated with the inlet of the high-temperature surface air cooler 5 through a high-temperature circulating water pump 10, and the outlet of the high-temperature surface air cooler 5 is communicated with the water distribution device 3 through a pipeline. The high-temperature surface cooler 5 is provided with a long water flowing pipe 8, and the long water flowing pipe 8 is provided with a valve. The long-flowing water pipe 8 is communicated with the circulating water tank 4. The operation mode is as follows: cold water in the circulating water tank 4 is supplied to the high-temperature surface air cooler 5 through the high-temperature circulating water pump 10 and a pipeline to take away heat of return air, the water temperature rises and then returns to the evaporative refrigeration water distribution device 3, heat and mass exchange is carried out between the filler 1 and outdoor fresh air, the water temperature is reduced, the reduced water falls into the circulating water tank 4 to form circulation, and the outdoor fresh air is discharged to the outside through the exhaust fan 2 after passing through the filler 1. The long water pipe 8 in the high-temperature surface cooler 5 can discharge water regularly/continuously when the unit is running, and sundries in the high-temperature surface cooler 5 are discharged into the circulating water tank 4. When the unit stops operating, the valve of the long-flowing water pipe 8 is in an open state, all water in the high-temperature surface cooler 5 is discharged, and the problem that sundries in the water are attached to the wall of the heat exchange pipe to influence the heat exchange efficiency of the heat exchanger when the water in the high-temperature surface cooler 5 stops operating is avoided.

As shown in fig. 2, a low-temperature surface cooler 11 is arranged in parallel on the air outlet side of the high-temperature surface cooler 5, a mechanical refrigerating unit 12 is longitudinally arranged on the upper portion of the side surface of the evaporation refrigerating section, wherein a water outlet pipe of the high-temperature surface cooler 5 is connected with a condenser inlet of the mechanical refrigerating unit 12, a water outlet pipe of the mechanical refrigerating unit 5 is connected with the water distribution device 3, an evaporator outlet pipe of the mechanical refrigerating unit 12 is connected with an inlet of the low-temperature surface cooler 11 through a low-temperature circulating water pump 13, and an outlet pipe of the low-temperature surface cooler 11 is connected with an evaporator inlet of the mechanical refrigerating unit 12. A mechanical refrigerating unit 12 is added in the cold source device, and the mechanical refrigerating unit 12 is longitudinally arranged at the upper part of the side surface of the filler 1; the air treatment device is provided with a low-temperature surface cooler 11, wherein the water outlet of the high-temperature surface cooler 5 is communicated with the inlet of a condenser of a mechanical refrigerating unit 12, and the outlet of the mechanical refrigerating condenser is communicated with the water distribution device 3; an evaporator outlet of the mechanical refrigerating unit 12 is communicated with an inlet of the low-temperature surface cooler 11, and an outlet of the low-temperature surface cooler 11 is communicated with an inlet of the mechanical refrigerating evaporator. The operation mode is as follows: in the first operation mode, only the evaporation refrigeration section is operated, the mechanical refrigeration unit 12 is closed, and the evaporation refrigeration section prepares high-temperature cold water which is supplied to the high-temperature surface air cooler 5 of the air treatment device to take away the heat of return air. And a second operation mode: when the temperature of cold water prepared by evaporative refrigeration cannot meet the requirement, mechanical refrigeration is started for supplementary refrigeration, high-temperature cold water prepared by an evaporative refrigeration section is supplied to a high-temperature surface cooler 5 to take away heat of an air return part, and a mechanical refrigeration unit 12 is used for preparing low-temperature cold water which is supplied to a low-temperature surface cooler 11 for supplementary refrigeration; the high-temperature water passing through the high-temperature surface cooler 5 takes heat of the mechanical refrigerator group 12 away at the condenser entering the mechanical refrigerator group 12.

As shown in fig. 3, a water storage device 17 is provided at the lower part of the mechanical refrigerator group 12, a water outlet pipe of the water storage device 17 is connected to a water supply pipe of the circulation tank 4, and a system water supply pipe is connected to the water storage device 17. A water storage tank is arranged below the mechanical refrigeration, the outlet of the water storage device is connected with a water replenishing pipe of the circulating water tank 4, and the water storage device is communicated with a system water replenishing pipe. The water storage device has the main function of ensuring normal cooling of the unit when water is cut off.

As shown in fig. 4, an exhaust fan 2 is provided on the top of the exhaust chamber. The exhaust fan 2 is arranged on the top.

As shown in fig. 5, a water storage device 17 is provided at the lower part of the mechanical refrigerator group 12, a water outlet pipe of the water storage device 17 is connected to a water supply pipe of the circulation tank 4, and a system water supply pipe is connected to the water storage device 17. The exhaust fan 2 is arranged at the top, the water storage tank is arranged below the mechanical refrigeration, the outlet of the water storage device 17 is connected with the water replenishing pipe of the circulating water tank 4, and the water storage device 17 is communicated with the system water replenishing pipe. The main function of the water storage device 17 is to ensure the normal cooling of the unit when water is cut off.

As shown in fig. 6, a low-temperature surface cooler 11 is arranged in parallel on the air outlet side of the high-temperature surface cooler 5, a mechanical refrigerating unit 12 is transversely arranged on the upper side of the evaporation refrigerating section, a water outlet pipe of the high-temperature surface cooler 5 is connected with a condenser inlet of the mechanical refrigerating unit 12, an outlet pipe of the mechanical refrigerating unit 12 is connected with the water distribution device 3, an evaporator outlet pipe of the mechanical refrigerating unit 12 is connected with an inlet of the low-temperature surface cooler 11 through a low-temperature circulating water pump 13, and an outlet pipe of the mechanical refrigerating unit 12 is connected with an evaporator inlet of the mechanical refrigerating unit 12. A mechanical refrigerating unit 12 is added in the cold source device, and the mechanical refrigerating unit 12 is arranged at the upper part of one side of the filler 1; the air treatment device is provided with a low-temperature surface cooler 11, and a low-temperature surface cooler 11 is additionally arranged in the low-temperature surface cooler 11, wherein the water outlet of the high-temperature surface cooler 5 is communicated with the inlet of a condenser of a mechanical refrigerating unit 12, and the outlet of the mechanical refrigerating condenser is communicated with the water distribution device 3; an evaporator outlet of the mechanical refrigerating unit 12 is communicated with an inlet of the low-temperature surface cooler 11, and an outlet of the low-temperature surface cooler 11 is communicated with an inlet of the mechanical refrigerating evaporator. The mechanical refrigerating unit 12 is arranged at the upper part of the evaporation refrigerating section, and the lower part of the mechanical refrigerating unit 12 can be used as an overhaul channel of the unit, so that the occupied area of the unit is saved. The operation mode is as follows: in the first operation mode, only the evaporation refrigeration section is operated, the mechanical refrigeration unit 12 is closed, and the evaporation refrigeration section prepares high-temperature cold water which is supplied to the high-temperature surface air cooler 5 of the air treatment device to take away the heat of return air. And a second operation mode: when the temperature of cold water prepared by evaporative refrigeration cannot meet the requirement, mechanical refrigeration is started for supplementary refrigeration, high-temperature cold water prepared by an evaporative refrigeration section is supplied to a high-temperature surface cooler 5 to take away heat of an air return part, and a mechanical refrigeration unit 12 is used for preparing low-temperature cold water which is supplied to a low-temperature surface cooler 11 for supplementary refrigeration; the high-temperature water passing through the high-temperature surface cooler 5 takes heat of the mechanical refrigerator group 12 away at the condenser entering the mechanical refrigerator group 12.

As shown in fig. 7, a dry cooling device 14 is obliquely arranged in the air exhaust chamber, the inlet of the dry cooling device 14 is communicated with the outside, the outlet of the dry cooling device is communicated with the inlet of the exhaust fan, a switching air plate 15 is arranged between the dry cooling device 14 and the outlet of the evaporation refrigeration section to control the water outlets of the air-out low-temperature surface air cooler of the dry cooling device 14 and the evaporation refrigeration section to be communicated with the inlet of the dry cooling device, and the outlet of the dry cooling device is communicated with the inlet of the evaporator of the mechanical refrigeration unit. A dry cooler 14 is added in the cold source device, the dry cooler 14 is obliquely arranged in an air exhaust cavity of the cold source device, an inlet of the exhaust fan 2 is communicated with an outlet of the dry cooler 14, and a rotatable switching device is arranged between the dry cooler 14 and an outlet of the evaporation refrigerating section; the outlet of the low-temperature surface cooler 11 is communicated with the inlet of the dry cooler 14, and the outlet of the dry cooler 14 is communicated with the inlet of the evaporator of the mechanical refrigerating unit 12. The operation mode is as follows: in the first operation mode, only the evaporation refrigeration section is operated, the mechanical refrigeration unit 12 is closed, the switching device is switched to one side of the dry cooler 14, the air inlet of the dry cooler 14 is closed, the evaporation refrigeration section prepares high-temperature cold water which is supplied to the high-temperature surface cooler 5 of the air treatment device, and the heat of return air is taken away. And a second operation mode: when the temperature of cold water prepared by evaporative refrigeration cannot meet the requirement, mechanical refrigeration is started to perform supplementary refrigeration, a switching device is switched to one side of a dry cooler 14, air inlet of the dry cooler 14 is closed, high-temperature cold water prepared by an evaporative refrigeration section is supplied to a high-temperature surface cooler 5 to take away heat of an air return part, a mechanical refrigeration unit 12 prepares low-temperature cold water, and the low-temperature cold water is supplied to a low-temperature surface cooler 11 to perform supplementary refrigeration; the high-temperature water passing through the high-temperature surface cooler 5 takes heat of the mechanical refrigerator group 12 away at the condenser entering the mechanical refrigerator group 12. And a third operation mode: when the outdoor temperature is low, the switching device is rotated to evaporate the outlet of the refrigeration section, the outlet air of the evaporation refrigeration section is closed, outdoor low-temperature air only passes through the dry cooler 14, the anti-freezing liquid in the dry cooler 14 is reduced, and then the outdoor low-temperature air is supplied to the low-temperature surface cooler 11 of the air treatment device to reduce the indoor return air temperature.

As shown in fig. 8, a cold storage device 16 is arranged at the other side of the evaporation refrigeration section, the outlet pipe of the evaporator of the mechanical refrigeration unit 12 is connected with the inlet of the cold storage device 16, the outlet pipe thereof is connected with the inlet of the low-temperature surface cooler 11 through a low-temperature circulating water pump 13, the outlet pipe thereof is connected with the inlet of the dry cooler, and the outlet of the dry cooler is connected with the inlet of the evaporator of the mechanical refrigeration unit. The cold source device is additionally provided with a cold accumulation device 16, the cold accumulation device 16 is arranged at the other side of the mechanical refrigerating unit 12, the outlet of the evaporator of the mechanical refrigerating unit 12 is communicated with the inlet of the cold accumulation device 16, the outlet of the cold accumulation device 16 is communicated with the inlet of the low-temperature surface air cooler 11, and the outlet of the low-temperature surface air cooler 11 is communicated with the inlet of the evaporator of the mechanical refrigerating unit 12. When the cold accumulation device 16 is mainly used, cold water in the cold accumulation device 16 can be used for refrigerating the unit together when power is cut off, and the safe operation of a refrigerating system is ensured.

As shown in fig. 9, a water storage device 17 is provided at the lower part of the cold storage device 16, a water outlet pipe provided at the bottom of the water storage device 17 is communicated with the circulation water tank 4, and a water supply pipe of the system is connected to the water storage device 17. The cold storage device 16 is added in the cold source device, the cold storage device 16 is arranged on the upper part of the water storage device 17, the outlet of the evaporator of the mechanical refrigerating unit 12 is communicated with the inlet of the cold storage device 16, the outlet of the cold storage device 16 is communicated with the inlet of the low-temperature surface air cooler 11, and the outlet of the low-temperature surface air cooler 11 is communicated with the inlet of the evaporator of the mechanical refrigerating unit 12. When the cold accumulation device 16 is mainly used, cold water in the cold accumulation device 16 can be used for refrigerating the unit together when power is cut off, and the safe operation of a refrigerating system is ensured.

As shown in fig. 10, the water outlet pipe of the circulating water tank 4 is connected to the inlet of the high temperature surface cooler 5 through the high temperature circulating water pump 10 and the water treatment device 18, and the outlets of the high temperature surface cooler 5 are respectively communicated with the water distribution device 3 and the condenser inlet of the mechanical refrigerating unit. A water treatment device 18 is added at the outlet of the high-temperature circulating water pump, the outlet water of the high-temperature surface air cooler 5 is respectively communicated with the inlet of a condenser of the mechanical refrigerating unit 12 and the water distribution device 3 of the evaporation refrigerating section, and a valve is added on a pipeline communicated with the water distribution device 3. When the mechanical cooling water is less than the high-temperature circulating water, part of the water can be bypassed and directly flows to the water distribution device 3, so that the power consumption of the water pump is reduced.

As shown in fig. 11, an overhaul platform 19 is disposed on the side of the mechanical refrigerator group 12, the water outlet pipe of the circulating water tank 4 is connected to the inlet of the high-temperature surface cooler 5 and the inlet of the mechanical refrigerator group condenser through the high-temperature circulating water pump 10 and the water treatment device 18, respectively, and the outlet of the high-temperature surface cooler 5 and the outlet of the mechanical refrigerator group condenser are communicated with the water distribution device 3. The maintenance platform 19 is arranged at the height of the mechanical refrigerating unit 12, and the exhaust fan 2/the mechanical refrigerating unit 12 can be maintained; a water treatment device 18 is added at the outlet of the high-temperature circulating water pump, and the outlet of the high-temperature circulating water pump 10 is respectively communicated with the inlet of a condenser of the mechanical refrigerating unit 12 and the inlet of the high-temperature surface cooler 5.

As shown in fig. 12, a water storage device 17 is arranged at the other side of the evaporation cooling section, a water outlet pipe of the water storage device 17 is connected with the circulating water tank 4, and a system water supply pipe is connected with the water storage device 17. The water storage device 17 is added in the cold source device, the water storage device 17 is arranged on the other side of the mechanical refrigerating unit 12, the outlet of the water storage device 17 is connected with the water replenishing pipe of the circulating water tank 4, and the water storage device 17 is communicated with the system water replenishing pipe. The main function of the water storage device 17 is to ensure the normal cooling of the unit when water is cut off.

As shown in fig. 13, a dry cooler 14 is horizontally disposed on the top of the exhaust chamber, a shielding plate 20 is disposed on the top of the dry cooler 14, a switching air plate 15 is disposed in the exhaust chamber, a rotating shaft is disposed at the center of the switching air plate 15, and the air outlet between the inlet of the dry cooler 14 and the evaporation cooling section is realized by controlling the switching air plate 15 through the rotating shaft. The dry cooler 14 is arranged at the upper part of the exhaust cavity, a rotary switching device is arranged between the inlet of the dry cooler 14 and the evaporation refrigerating section, and a baffle plate 20 is arranged at the upper part of the inlet of the dry cooler 14; the shielding plate 20 on the upper portion of the dry cooler 14 is mainly used for preventing rain, snow or sundries from directly falling to the surface of the dry cooler 14 outdoors to cause the blockage of the dry cooler 14.

As shown in fig. 14, a cold storage device 16 is arranged on the other side of the evaporation refrigeration section, the outlet pipe of the evaporator of the mechanical refrigeration unit 12 is connected with the inlet of the cold storage device 16, the outlet pipe of the mechanical refrigeration unit is connected with the inlet of the low-temperature surface cooler 11 through a low-temperature circulating water pump 13, the outlet pipe of the low-temperature surface cooler 11 is connected with the inlet of the dry cooler 14, and the outlet pipe of the dry cooler 14 is connected with the inlet of the evaporator of the mechanical refrigeration unit 12. The cold source device is additionally provided with a cold accumulation device 16, the cold accumulation device 16 is arranged at the other side of the mechanical refrigerating unit 12, the outlet of the evaporator of the mechanical refrigerating unit 12 is communicated with the inlet of the cold accumulation device 16, the outlet of the cold accumulation device 16 is communicated with the inlet of the low-temperature surface air cooler 11, and the outlet of the low-temperature surface air cooler 11 is communicated with the inlet of the evaporator of the mechanical refrigerating unit 12. When the cold accumulation device 16 is mainly used, cold water in the cold accumulation device 16 can be used for refrigerating the unit together when power is cut off, and the safe operation of a refrigerating system is ensured.

As shown in fig. 15, a water storage device 17 is provided below the mechanical refrigeration unit 12, a water outlet pipe of the water storage device 17 is connected to a water supply pipe of the circulation water tank 4, and a system water supply pipe is communicated with the water storage device 17. The water storage device 17 is added in the cold source device, the water storage device 17 is arranged below the mechanical refrigerating unit 12, the outlet of the water storage device 17 is connected with the water replenishing pipe of the circulating water tank 4, and the water storage device 17 is communicated with the system water replenishing pipe. The main function of the water storage device 17 is to ensure the normal cooling of the unit when water is cut off.

As shown in fig. 16, a cold storage device 16 is arranged on the other side of the evaporation refrigeration section, the outlet pipe of the evaporator of the mechanical refrigeration unit 12 is connected with the inlet of the cold storage device 16, the outlet pipe of the mechanical refrigeration unit is connected with the inlet of the low-temperature surface cooler 11 through a low-temperature circulating water pump 13, the outlet pipe of the low-temperature surface cooler 11 is connected with the inlet of the dry cooler 14, and the outlet pipe of the mechanical refrigeration unit 12 is connected with the inlet of the evaporator. The cold source device is additionally provided with a cold accumulation device 16, the cold accumulation device 16 is arranged at the other side of the mechanical refrigerating unit 12, the outlet of the evaporator of the mechanical refrigerating unit 12 is communicated with the inlet of the cold accumulation device 16, the outlet of the cold accumulation device 16 is communicated with the inlet of the low-temperature surface air cooler 11, and the outlet of the low-temperature surface air cooler 11 is communicated with the inlet of the evaporator of the mechanical refrigerating unit 12. When the cold accumulation device 16 is mainly used, cold water in the cold accumulation device 16 can be used for refrigerating the unit together when power is cut off, and the safe operation of a refrigerating system is ensured.

As shown in fig. 17, a mechanical refrigerator group 12 is provided on the lower side of the evaporation cooling section, and an access passage is provided between the mechanical refrigerator group 12 and the evaporation cooling section. A mechanical refrigerating unit 12 is added in the cold source device, and the mechanical refrigerating unit 12 is arranged at the lower part of one side of the filler 1; the air treatment device is provided with a high-temperature surface cooler and a low-temperature surface cooler 11, wherein the water outlet of the high-temperature surface cooler 5 is communicated with the inlet of a condenser of a mechanical refrigerating unit 12, and the outlet of the mechanical refrigerating condenser is communicated with the water distribution device 3; an evaporator outlet of the mechanical refrigerating unit 12 is communicated with an inlet of the low-temperature surface cooler 11, and an outlet of the low-temperature surface cooler 11 is communicated with an inlet of the mechanical refrigerating evaporator. An overhaul channel is arranged between the mechanical refrigerating unit 12 and the evaporation refrigerating section. The operation mode is as follows: in the first operation mode, only the evaporation refrigeration section is operated, the mechanical refrigeration unit 12 is closed, and the evaporation refrigeration section prepares high-temperature cold water which is supplied to the high-temperature surface air cooler 5 of the air treatment device to take away the heat of return air. And a second operation mode: when the temperature of cold water prepared by evaporative refrigeration cannot meet the requirement, mechanical refrigeration is started for supplementary refrigeration, high-temperature cold water prepared by an evaporative refrigeration section is supplied to a high-temperature surface cooler 5 to take away heat of an air return part, and a mechanical refrigeration unit 12 is used for preparing low-temperature cold water which is supplied to a low-temperature surface cooler 11 for supplementary refrigeration; the high-temperature water passing through the high-temperature surface cooler 5 takes heat of the mechanical refrigerator group 12 away at the condenser entering the mechanical refrigerator group 12.

As shown in fig. 18, the dry cooler 14 is obliquely arranged on the upper side of the evaporation cooling section, the opening arranged on the bottom surface of the front part of the exhaust chamber is communicated with the air outlet side of the dry cooler 14, the switching air plate 15 is hinged on the inlet of the exhaust chamber, and the switching air plate 15 is matched with the opening of the exhaust chamber or the outlet of the exhaust chamber of the evaporation cooling section so as to control the air outlet of the dry cooler 14 and the evaporation cooling section. A dry cooler 14 is added in the cold source device, the dry cooler 14 is obliquely arranged on one side of the evaporation refrigerating section, an inlet of the exhaust fan 2 is communicated with an outlet of the dry cooler 14, and rotatable switching devices are arranged on the dry cooler 14 and the outlet of the evaporation refrigerating section; the outlet of the low-temperature surface cooler 11 is communicated with the inlet of the dry cooler 14, and the outlet of the dry cooler 14 is communicated with the inlet of the evaporator of the mechanical refrigerating unit 12. The operation mode is as follows: in the first operation mode, only the evaporation refrigeration section is operated, the mechanical refrigeration unit 12 is closed, the switching device is switched to one side of the dry cooler 14, the air inlet of the dry cooler 14 is closed, the evaporation refrigeration section prepares high-temperature cold water which is supplied to the high-temperature surface cooler 5 of the air treatment device, and the heat of return air is taken away. And a second operation mode: when the temperature of cold water prepared by evaporative refrigeration cannot meet the requirement, mechanical refrigeration is started to perform supplementary refrigeration, a switching device is switched to one side of a dry cooler 14, air inlet of the dry cooler 14 is closed, high-temperature cold water prepared by an evaporative refrigeration section is supplied to a high-temperature surface cooler 5 to take away heat of an air return part, a mechanical refrigeration unit 12 prepares low-temperature cold water, and the low-temperature cold water is supplied to a low-temperature surface cooler 11 to perform supplementary refrigeration; the high-temperature water passing through the high-temperature surface cooler 5 takes heat of the mechanical refrigerator group 12 away at the condenser entering the mechanical refrigerator group 12. And a third operation mode: when the outdoor temperature is low, the switching device is rotated to evaporate the outlet of the refrigeration section, the outlet air of the evaporation refrigeration section is closed, outdoor low-temperature air only passes through the dry cooler 14, the anti-freezing liquid in the dry cooler 14 is reduced, and then the outdoor low-temperature air is supplied to the low-temperature surface cooler 11 of the air treatment device to reduce the indoor return air temperature.

As shown in fig. 19, a cold storage device 16 is arranged at the other side of the evaporation refrigeration section, the outlet pipe of the evaporator of the mechanical refrigeration unit 12 is connected with the inlet of the cold storage device 16, the outlet pipe of the cold storage device 16 is connected with the inlet of the low-temperature surface air cooler 11, the outlet pipe of the cold storage device is connected with the inlet of the dry air cooler 14, and the outlet pipe of the dry air cooler 14 is connected with the inlet of the evaporator of the mechanical refrigeration unit 12. The cold source device is additionally provided with a cold accumulation device 16, the cold accumulation device 16 is arranged at the other side of the dry cooler 14, the outlet of the evaporator of the mechanical refrigerating unit 12 is communicated with the inlet of the cold accumulation device 16, the outlet of the cold accumulation device 16 is communicated with the inlet of the low-temperature surface cooler 11, and the outlet of the low-temperature surface cooler 11 is communicated with the inlet of the evaporator of the mechanical refrigerating unit 12. When the cold accumulation device 16 is mainly used, cold water in the cold accumulation device 16 can be used for refrigerating the unit together when power is cut off, and the safe operation of a refrigerating system is ensured.

As shown in fig. 20, a water storage device 17 is arranged on the other side of the evaporation cooling section, a water outlet pipe of the water storage device 17 is communicated with the circulating water tank 4, the bottom surface of the water storage device 17 is higher than the circulating water tank 4, and the water storage device 17 is communicated with a system water replenishing pipe. Increase water storage device 17 in the cold source device, water storage device 17 sets up the opposite side at the evaporation refrigeration section, and water storage device 17 exit linkage is circulating water tank 4's moisturizing pipe, and water storage device 17 and system moisturizing pipe intercommunication. The main function of the water storage device 17 is to ensure the normal cooling of the unit when water is cut off.

As shown in fig. 21, a cold storage device 16 is arranged above the water storage device 17, the outlet pipe of the evaporator of the mechanical refrigerating unit 12 is connected with the inlet of the cold storage device 16, the outlet pipe of the cold storage device is connected with the inlet of the low-temperature surface cooler 11 through a low-temperature circulating water pump 13, the outlet pipe of the low-temperature surface cooler 11 is connected with the inlet of the dry cooler 14, and the outlet pipe of the dry cooler 14 is connected with the inlet of the evaporator of the mechanical refrigerating unit 12. The cold storage device 16 is added in the cold source device, the cold storage device 16 is arranged at the upper part of the water storage device 17, the outlet of the evaporator of the mechanical refrigerating unit 12 is communicated with the inlet of the cold storage device 16, the outlet of the cold storage device 16 is communicated with the inlet of the low-temperature surface air cooler 11, and the outlet of the low-temperature surface air cooler 11 is communicated with the inlet of the evaporator of the mechanical refrigerating unit 12. When the cold accumulation device 16 is mainly used, cold water in the cold accumulation device 16 can be used for refrigerating the unit together when power is cut off, and the safe operation of a refrigerating system is ensured.

As shown in fig. 22, the dry cooler 14 is installed in the exhaust room in an inclined manner, the inlet of the dry cooler 14 is communicated with the outside, the outlet of the dry cooler is communicated with the inlet of the exhaust fan, the lower end of the dry cooler 14 is hinged with a switching air plate 15 to control the air outlet of the dry cooler 14 and the evaporation cooling section, a low-temperature surface cooler 11 is arranged in parallel at the air outlet side of the high-temperature surface cooler 5, a cold accumulation device 16 is arranged at the upper part of the side of a mechanical refrigerating unit 12 arranged at one side of the evaporation refrigerating section, the other side of the evaporation refrigeration section is positioned below the exhaust fan 2, a water storage device 17 is arranged, a water outlet pipe of the water storage device 17 is connected with a water replenishing pipe of the circulating water tank 4, an outlet pipe of a cold storage device 16 is connected with an inlet of the low-temperature surface air cooler 11 through a low-temperature circulating water pump 13, the outlet pipe of the dry cooler 14 is connected with the inlet of the dry cooler 14, and the outlet pipe of the dry cooler 14 is connected with the inlet of the evaporator of the mechanical refrigerating unit 12. The water outlet pipe of the circulating water tank 4 is connected with the inlet of a high-temperature surface cooler 5 through a high-temperature circulating water pump 10, the outlet pipe of the high-temperature surface cooler 5 is connected with the inlet of a condenser of a mechanical refrigerating unit 12, and the outlet pipe of the condenser is connected with the water distribution device 3. The mechanical refrigerating unit 12 is arranged below the cold accumulation device 16, and the water storage device 17 is arranged at the other end of the filler 1 and below the exhaust fan 2.

As shown in FIG. 23, a bypass is provided on the outlet pipe of the high temperature surface cooler 5, and the bypass is connected to the water distribution device 3 through a valve. The outlet of the high-temperature surface cooler 5 is respectively communicated with the condenser of the mechanical refrigerating unit 12 and the water distribution device 3; a valve is added on a pipeline communicated with the water distribution device 3. When the mechanical cooling water is less than the high-temperature circulating water, part of the water can be bypassed and directly flows to the water distribution device 3, so that the power consumption of the water pump is reduced.

As shown in fig. 24, a mechanical refrigerating unit 12 is arranged at the lower part of one side of the evaporation refrigerating section, a dry cooler 14 is obliquely arranged above the mechanical refrigerating unit 12, a through hole arranged on the bottom surface of the exhaust chamber is communicated with the air outlet side of the dry cooler 14, a cold storage device 16 and a water storage device 17 are sequentially arranged at the other side of the mechanical refrigerating unit 12 from top to bottom, a water outlet pipe of the water storage device 17 is communicated with a circulating water tank 4, the bottom surface of the water storage device 17 is higher than the circulating water tank 4, an evaporator outlet pipe of the mechanical refrigerating unit 12 is connected with an inlet of the cold storage device 16, an outlet pipe of the mechanical refrigerating unit 12 is connected with an inlet of the low-temperature surface cooler 11, an outlet pipe of the low-temperature surface cooler 11 is connected with an inlet of the dry cooler 14, an outlet pipe of the low-temperature surface cooler 11 is connected with an evaporator inlet of the mechanical refrigerating unit 12, the circulating water tank 4 is connected with an inlet of the high-temperature surface cooler 5 through a high-temperature circulating water pump 10, an outlet pipe of the high-temperature surface cooler 5 is connected with an inlet of the mechanical refrigerating unit 12, the outlet pipe of the condenser is connected with a water distribution device 3, and a switching air plate 15 is hinged between the opening on the bottom surface of the air exhaust chamber and the air outlet of the evaporation refrigeration section so as to control the air outlet of the dry cooler 14 and the evaporation refrigeration section. The dry coolers 14, the cold accumulation devices 16 and the water storage devices 17 on two sides of the evaporation refrigeration section are exchanged for positions.

As shown in fig. 25, a dry cooler 14 is installed in the exhaust chamber in an inclined manner, the inlet of the dry cooler 14 is communicated with the outside, the outlet of the dry cooler is communicated with the inlet of an exhaust fan, a switching air plate 15 is hinged at the lower end of the dry cooler 14 to control the air outlet of the dry cooler 14 and the evaporation cooling section, a mechanical refrigerating unit 12 is arranged at the upper part of the longitudinal side of the filler 1, a low-temperature surface cooler 11 is arranged in parallel at the air outlet side of the high-temperature surface cooler 5, a water storage device 17 is arranged at one side of the evaporation cooling section below the exhaust chamber, a cold storage device 16 is arranged at the other side of the evaporation cooling section, the water outlet pipe of the water storage device 17 is connected with the water supply pipe of the circulating water tank 4, the outlet pipe of the cold storage device 16 is connected with the inlet of the low-temperature surface cooler 11 through a low-temperature circulating water pump 13, the outlet pipe of the cold cooler is connected with the inlet of the dry cooler 14, the outlet pipe of the dry cooler 14 is connected with the evaporator inlet of the mechanical refrigerating unit 12, the outlet pipe of the circulating water tank 4 is connected with the inlet of the cold storage device 16, the outlet pipe of the circulating water tank is connected with the inlet of the high-temperature surface cooler 5 through the arranged high-temperature circulating water pump 10, the outlet pipe of the circulating water tank is connected with the inlet of the condenser of the mechanical refrigerating unit 12, and the outlet pipe of the condenser of the mechanical refrigerating unit is connected with the water distribution device 3. The mechanical refrigerator group 12 is longitudinally arranged at the upper part of the side surface of the filler 1.

As shown in FIG. 26, a bypass is provided on the outlet pipe of the high temperature surface cooler 5, and the bypass is connected to the water distribution device 3 through a valve. The outlet of the high-temperature surface cooler 5 is respectively communicated with the condenser of the mechanical refrigerating unit 12 and the water distribution device 3; a valve is added on a pipeline communicated with the water distribution device 3. When the mechanical cooling water is less than the high-temperature circulating water, part of the water can be bypassed and directly flows to the water distribution device 3, so that the power consumption of the water pump is reduced.

The outlet of the low-temperature surface cooler 11 is respectively communicated with the inlet of a dry cooler 14 and the inlet of an evaporator of the mechanical refrigerating unit 12, and a valve is arranged on a communicating pipe with the mechanical refrigerating evaporator. When the dry cooler is not used, the antifreeze of the low-temperature surface cooler can directly enter the mechanical refrigerating unit for refrigeration, so that the resistance of the system is reduced, and the power consumption of the water pump is reduced.

The outlet of the evaporator of the mechanical refrigerating unit 12 is respectively communicated with the inlet of the cold accumulation device 16 and the inlet of the low-temperature surface cooler 11, and a valve is additionally arranged on a pipeline communicated with the inlet of the low-temperature surface cooler 11. When the cold accumulation device is not used/needs to accumulate cold, the low-temperature cold water prepared by the mechanical refrigerating unit can directly enter the low-temperature surface cooler for refrigeration, or part of the cold water prepared by the mechanical refrigerating unit is supplied to the low-temperature surface cooler for refrigeration, and part of the cold water enters the cold accumulation device for cold accumulation.

Claims

1. The utility model provides a special indirect evaporative cooling modularization air handling unit in computer lab, characterized by: the air-conditioning system is composed of a cold source device and an air treatment device, wherein the cold source device is an evaporation refrigeration section, the structure is that a filler (1) is arranged in a machine box, an exhaust chamber and a water distribution device (3) which are provided with an exhaust fan (2) are sequentially arranged above the filler (1) from top to bottom, a circulating water tank (4) is arranged below the filler (1), the air treatment device is arranged on the side part of the cold source device, the air treatment device is structurally an air treatment chamber with a return air inlet (7), a high-temperature surface air cooler (5) with an air inlet surface provided with a filter screen (6) is obliquely arranged in the air treatment chamber, the air treatment chamber is divided into an air inlet chamber and a cold air chamber, a blower (9) is arranged on the outlet of the cold air chamber, the water outlet pipe of the circulating water tank (4) is connected with the inlet of a high-temperature surface air cooler (5) through a high-temperature circulating water pump (10), and the outlet pipe of the circulating water distribution device (3) is connected with the water distribution device, the high-temperature surface cooler (5) is provided with a long water flowing pipe (8) which is connected with the circulating water tank (4).

2. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 1, wherein: the air outlet side of the high-temperature surface cooler (5) is provided with low-temperature surface coolers (11) in parallel, the upper part of the side surface of the evaporation refrigeration section is longitudinally provided with a mechanical refrigeration unit (12), a water outlet pipe of the high-temperature surface cooler (5) is connected with a condenser inlet of the mechanical refrigeration unit (12), a water outlet pipe of the high-temperature surface cooler is connected with a water distribution device (3), an outlet pipe of an evaporator of the mechanical refrigeration unit (12) is connected with an inlet of the low-temperature surface cooler (11) through a low-temperature circulating water pump (13), and an outlet pipe of the low-temperature surface cooler (11) is connected with an evaporator inlet of the mechanical refrigeration unit (12).

3. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 2, wherein: the lower part of the mechanical refrigerating unit (12) is provided with a water storage device (17), a water outlet pipe of the water storage device (17) is connected with a water replenishing pipe of the circulating water tank (4), and a system water replenishing pipe is connected with the water storage device (17).

4. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 2, wherein: an exhaust fan (2) is arranged at the top of the exhaust chamber.

5. The indirect evaporative cooling modular air handling unit special for the machine room as claimed in claim 4, wherein: the lower part of the mechanical refrigerating unit (12) is provided with a water storage device (17), a water outlet pipe of the water storage device (17) is connected with a water replenishing pipe of the circulating water tank (4), and a system water replenishing pipe is connected with the water storage device (17).

6. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 1, wherein: the air outlet side of the high-temperature surface cooler (5) is provided with low-temperature surface coolers (11) in parallel, the upper side of the evaporation refrigeration section is transversely provided with a mechanical refrigeration unit (12), the water outlet pipe of the high-temperature surface cooler (5) is connected with the condenser inlet of the mechanical refrigeration unit (12), the outlet pipe of the high-temperature surface cooler is connected with a water distribution device (3), the outlet pipe of the evaporator of the mechanical refrigeration unit (12) is connected with the inlet of the low-temperature surface cooler (11) through a low-temperature circulating water pump (13), and the outlet pipe of the evaporator of the mechanical refrigeration unit (12) is connected with the evaporator inlet of the mechanical refrigeration unit (12).

7. The indirect evaporative cooling modular air handling unit special for the machine room as claimed in claim 6, wherein: the air exhaust chamber is obliquely provided with a dry cooler (14), the inlet of the dry cooler (14) is communicated with the outside, the outlet of the dry cooler is communicated with the inlet of an exhaust fan, a switching air plate (15) is arranged between the dry cooler (14) and the outlet of an evaporation refrigeration section to control the air outlet of the dry cooler (14) and the evaporation refrigeration section, the water outlet of a low-temperature surface cooler is communicated with the inlet of the dry cooler, and the outlet of the dry cooler is communicated with the inlet of an evaporator of a mechanical refrigeration unit.

8. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 7, wherein: the other side of the evaporation refrigeration section is provided with a cold accumulation device (16), the outlet pipe of the evaporator of the mechanical refrigeration unit (12) is connected with the inlet of the cold accumulation device (16), the outlet pipe of the mechanical refrigeration unit is connected with the inlet of the low-temperature surface air cooler (11) through a low-temperature circulating water pump (13), the outlet pipe of the mechanical refrigeration unit is connected with the inlet of the dry cooler, and the outlet of the dry cooler is connected with the inlet of the evaporator of the mechanical refrigeration unit.

9. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 8, wherein: the lower part of the cold accumulation device (16) is provided with a water storage device (17), a water outlet pipe arranged at the bottom of the water storage device (17) is communicated with the circulating water tank (4), and a water replenishing pipe of the system is connected with the water storage device (17).

10. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 9, wherein: the water outlet pipe of the circulating water tank (4) is connected with the inlet of the high-temperature surface cooler (5) through a high-temperature circulating water pump (10) and a water treatment device (18), and the outlet of the high-temperature surface cooler (5) is respectively communicated with the water distribution device (3) and the inlet of the condenser of the mechanical refrigerating unit.

11. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 10, wherein: the side part of the mechanical refrigerating unit (12) is provided with an overhaul platform (19), a water outlet pipe of the circulating water tank (4) is respectively connected with an inlet of a high-temperature surface air cooler and an inlet of a condenser of the mechanical refrigerating unit through a high-temperature circulating water pump (10) and a water treatment device (18), and an outlet of the high-temperature surface air cooler (5) and an outlet of the condenser of the mechanical refrigerating unit are communicated with the water distribution device (3).

12. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 7, wherein: the other side of the evaporation refrigeration section is provided with a water storage device (17), a water outlet pipe of the water storage device (17) is connected with a circulating water tank (4), and a system water replenishing pipe is connected with the water storage device (17).

13. The indirect evaporative cooling modular air handling unit special for the machine room as claimed in claim 6, wherein: the dry cooler (14) is horizontally arranged on the upper surface of the exhaust chamber, the shielding plate (20) is arranged on the upper portion of the dry cooler (14), the switching air plate (15) is arranged in the exhaust chamber, the rotating shaft is arranged at the center of the switching air plate (15), and the air outlet between the inlet of the dry cooler (14) and the evaporation refrigerating section is realized by controlling the switching air plate (15) through the rotating shaft.

14. The indirect evaporative cooling modular air handling unit special for the machine room of claim 13, wherein: the other side of the evaporation refrigeration section is provided with a cold accumulation device (16), the outlet pipe of the evaporator of the mechanical refrigeration unit (12) is connected with the inlet of the cold accumulation device (16), the outlet pipe of the mechanical refrigeration unit is connected with the inlet of the low-temperature surface air cooler (11) through a low-temperature circulating water pump (13), the outlet pipe of the low-temperature surface air cooler (11) is connected with the inlet of the dry air cooler (14), and the outlet pipe of the dry air cooler (14) is connected with the inlet of the evaporator of the mechanical refrigeration unit (12).

15. The indirect evaporative cooling modular air handling unit special for the machine room of claim 13, wherein: a water storage device (17) is arranged below the mechanical refrigerating unit (12), a water outlet pipe of the water storage device (17) is connected with a water replenishing pipe of the circulating water tank (4), and a system water replenishing pipe is communicated with the water storage device (17).

16. The indirect evaporative cooling modular air handling unit for use with a machine room of claim 15, wherein: the other side of the evaporation refrigeration section is provided with a cold accumulation device (16), the outlet pipe of the evaporator of the mechanical refrigeration unit (12) is connected with the inlet of the cold accumulation device (16), the outlet pipe of the mechanical refrigeration unit is connected with the inlet of the low-temperature surface cooler (11) through a low-temperature circulating water pump (13), the outlet pipe of the low-temperature surface cooler (11) is connected with the inlet of the dry cooler (14), and the outlet pipe of the mechanical refrigeration unit (12) is connected with the inlet of the evaporator.

17. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 1, wherein: a mechanical refrigerating unit (12) is arranged at the lower side of the evaporation refrigerating section, and an overhaul channel is arranged between the mechanical refrigerating unit (12) and the evaporation refrigerating section.

18. The indirect evaporative cooling modular air handling unit for use with a machine room of claim 17, wherein: the dry cooler (14) is obliquely arranged on the upper side of the evaporation refrigeration section, the opening formed in the bottom surface of the front part of the exhaust chamber is communicated with the air outlet side of the dry cooler (14), the switching air plate (15) is hinged to the inlet of the exhaust chamber, and the switching air plate (15) is matched with the opening of the exhaust chamber or the outlet of the exhaust chamber of the evaporation refrigeration section to control the air outlet of the dry cooler (14) and the evaporation refrigeration section.

19. The indirect evaporative cooling modular air handling unit for use with a machine room of claim 18, wherein: the other side of the evaporation refrigeration section is provided with a cold accumulation device (16), an outlet pipe of an evaporator of the mechanical refrigeration unit (12) is connected with an inlet of the cold accumulation device (16), an outlet pipe of the cold accumulation device (16) is connected with an inlet of the low-temperature surface air cooler (11), an outlet pipe of the cold accumulation device is connected with an inlet of the dry air cooler (14), and an outlet pipe of the dry air cooler (14) is connected with an inlet of the evaporator of the mechanical refrigeration unit (12).

20. The indirect evaporative cooling modular air handling unit for use with a machine room of claim 19, wherein: the other side of the evaporation refrigeration section is provided with a water storage device (17), a water outlet pipe of the water storage device (17) is communicated with the circulating water tank (4), the bottom surface of the water storage device (17) is higher than the circulating water tank (4), and the water storage device (17) is communicated with a system water replenishing pipe.

21. The indirect evaporative cooling modular air handling unit for use with a machine room of claim 20, wherein: the cold storage device (16) is arranged above the water storage device (17), the outlet pipe of the evaporator of the mechanical refrigerating unit (12) is connected with the inlet of the cold storage device (16), the outlet pipe of the mechanical refrigerating unit is connected with the inlet of the low-temperature surface air cooler (11) through the arranged low-temperature circulating water pump (13), the outlet pipe of the low-temperature surface air cooler (11) is connected with the inlet of the dry air cooler (14), and the outlet pipe of the dry air cooler (14) is connected with the inlet of the evaporator of the mechanical refrigerating unit (12).

22. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 1, wherein: a dry cooler (14) is obliquely installed in an air exhaust chamber, the inlet of the dry cooler (14) is communicated with the outside, the outlet of the dry cooler is communicated with the inlet of an exhaust fan, a switching air plate (15) is hinged at the lower end of the dry cooler (14) to control the air exhaust of the dry cooler (14) and an evaporation refrigerating section, a low-temperature surface cooler (11) is arranged in parallel at the air exhaust side of a high-temperature surface cooler (5), a cold storage device (16) is arranged at the upper part of the side of a mechanical refrigerating unit (12) arranged at one side of the evaporation refrigerating section, a water storage device (17) is arranged at the other side of the evaporation refrigerating section below the exhaust fan (2), the water outlet pipe of the water storage device (17) is connected with a water replenishing pipe of a circulating water tank (4), the outlet pipe of the cold storage device (16) is connected with the inlet of the low-temperature surface cooler (11) through a low-temperature circulating water pump (13), and the outlet pipe of the cold storage device is connected with the inlet of the dry cooler (14), an outlet pipe of the dry cooler (14) is connected with an evaporator inlet of the mechanical refrigerating unit (12), a water outlet pipe of the circulating water tank (4) is connected with an inlet of the high-temperature surface cooler (5) through a high-temperature circulating water pump (10), an outlet pipe of the high-temperature surface cooler (5) is connected with a condenser inlet of the mechanical refrigerating unit (12), and an outlet pipe of the condenser is connected with the water distribution device (3).

23. The indirect evaporative cooling modular air handling unit for use with a machine room of claim 22, wherein: a bypass is arranged on an outlet pipe of the high-temperature surface cooler (5), and the bypass is connected with the water distribution device (3) through a valve arranged on the bypass.

24. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 1, wherein: a mechanical refrigerating unit (12) is arranged at the lower part of one side of the evaporation refrigerating section, a dry cooler (14) is obliquely arranged above the mechanical refrigerating unit (12), a port arranged on the bottom surface of an exhaust chamber is communicated with the air outlet side of the dry cooler (14), a cold storage device (16) and a water storage device (17) are sequentially arranged at the other side of the mechanical refrigerating unit (12) from top to bottom, a water outlet pipe of the water storage device (17) is communicated with a circulating water tank (4), the bottom surface of the water storage device (17) is higher than the circulating water tank (4), an outlet pipe of an evaporator of the mechanical refrigerating unit (12) is connected with an inlet of the cold storage device (16), an outlet pipe of the mechanical refrigerating unit (12) is connected with an inlet of a low-temperature surface cooler (11), an outlet pipe of the low-temperature surface cooler (11) is connected with an inlet of the dry cooler (14), an outlet pipe of the mechanical refrigerating unit (12) is connected with an inlet of the evaporator, a water outlet pipe of the circulating water tank (4) is connected with an inlet of a high-temperature surface cooler (5) through a high-temperature circulating water pump (10), the outlet pipe of the high-temperature surface cooler (5) is connected with the inlet of a condenser of the mechanical refrigerating unit (12), the outlet pipe of the condenser is connected with the water distribution device (3), and a switching air plate (15) is hinged between the opening on the bottom surface of the exhaust chamber and the exhaust outlet of the evaporation refrigerating section so as to control the air outlet of the dry cooler (14) and the evaporation refrigerating section.

25. The indirect evaporative cooling modular air handling unit special for machine rooms according to claim 1, wherein: a dry cooler (14) is obliquely arranged in an air exhaust chamber, the inlet of the dry cooler (14) is communicated with the outside, the outlet of the dry cooler is communicated with the inlet of an exhaust fan, a switching air plate (15) is hinged at the lower end of the dry cooler (14) to control the air exhaust of the dry cooler (14) and an evaporation refrigerating section, a mechanical refrigerating unit (12) is arranged at the upper part of the longitudinal side of the filler (1), a low-temperature surface cooler (11) is arranged in parallel at the air exhaust side of a high-temperature surface cooler (5), a water storage device (17) is arranged at one side of the evaporation refrigerating section and positioned below the air exhaust chamber, a cold storage device (16) is arranged at the other side of the evaporation refrigerating section, the water outlet pipe of the water storage device (17) is connected with a water replenishing pipe of a circulating water tank (4), the outlet pipe of the cold storage device (16) is connected with the inlet of the low-temperature surface cooler (11) through a low-temperature circulating water pump (13), and the outlet pipe of the dry cooler (14) is connected with the inlet of the dry cooler, the outlet pipe of the dry cooler (14) is connected with the inlet of the evaporator of the mechanical refrigerating unit (12), the outlet pipe of the dry cooler is connected with the inlet of the cold storage device (16), the water outlet pipe of the circulating water tank (4) is connected with the inlet of the high-temperature surface cooler (5) through the arranged high-temperature circulating water pump (10), the outlet pipe of the circulating water tank is connected with the inlet of the condenser of the mechanical refrigerating unit (12), and the outlet pipe of the condenser of the circulating water tank is connected with the water distribution device (3).

26. The indirect evaporative cooling modular air handling unit for use with a machine room of claim 25, wherein: a bypass is arranged on an outlet pipe of the high-temperature surface cooler (5), and the bypass is connected with the water distribution device (3) through a valve arranged on the bypass.

27. The machine room dedicated indirect evaporative cooling modular air handling unit of claim 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, wherein: the outlet of the low-temperature surface cooler is respectively communicated with the inlet of the dry cooler and the inlet of the mechanical refrigerating unit evaporator, and a valve is arranged on a communicating pipe with the mechanical refrigerating evaporator.

28. The modular indirect evaporative cooling air handling unit for machine rooms as claimed in claim 8, 9, 10, 11, 14, 16, 19, 21, 22, 23, 24, 25 or 26, wherein: the outlet of the mechanical refrigerating unit evaporator is respectively communicated with the inlet of the cold accumulation device and the inlet of the low-temperature surface cooler, and a valve is additionally arranged on a pipeline communicated with the inlet of the low-temperature surface cooler.