JP6971126B2 - Outside air processing equipment - Google Patents

Description

In the present invention, the outside air supplied to the air supply target space is arranged in the air supply air passage through which the outside air is passed by the wind power of the air supply fan, and the outside air that is arranged in the air supply air passage and cools the outside air flowing through the air supply air passage. Wet purification that is arranged on the downstream side of the cooling unit and the outside air cooling unit in the air supply air passage and allows the outside air flowing through the air supply air passage to pass through the water film formed by the water supply to remove impurities from the outside air. It relates to an outside air treatment device equipped with a unit.

Conventionally, the outside air that has passed through the air supply air passage and is supplied to the air supply target space is passed through the water film of the wet purification unit arranged in the air supply air passage, and impurities such as chemical substances and dust are removed from the outside air. An outside air treatment device configured to remove is known (see, for example, Patent Document 1).

In the outside air treatment device described in Patent Document 1, an outside air cooling unit (cooling coil) that cools the outside air flowing through the air supply air passage is located upstream of the wet purification unit (water film 11 to 14) in the air supply air passage. 4) is provided. Therefore, the low-temperature outside air cooled by the outside air cooling unit (4) passes through the wet purification unit (11 to 14). Further, in this outside air treatment device, the drain water dropped from the wet purification unit (11 to 14) is irradiated with UV (ultraviolet rays) to reduce the TOC (total organic carbon amount) that damages the water film, and then. It is supplied to the water film (11-14) of the wet purification unit via the pure water production apparatus (37).

Japanese Unexamined Patent Publication No. 2008-190753

In the outside air treatment device described in Patent Document 1, since the drain water is reused as the water supply supplied to the wet purification unit, a UV irradiation device, a pure water production device, or the like for improving the water quality of the water supply is required. Therefore, the equipment cost becomes high.
Further, in this outside air treatment device, drain water that has been irradiated with UV and has been heated to a temperature higher than room temperature by passing through the pure water production device is supplied to the wet purification unit as water supply. In this way, when water supply at room temperature or higher is supplied to the wet purification unit, in the wet purification unit, the low-temperature outside air cooled by the outside air cooling unit comes into contact with the water supply at room temperature or higher. By exchanging heat, it will be heated. Therefore, especially during cooling in summer, it is necessary to increase the cooling load on the outside air in the outside air cooling unit in order to maintain the supply air supplied to the air supply target space at a low temperature after passing through the water film. As a result, it was a factor in the deterioration of energy efficiency.

In view of this situation, the main problem of the present invention is to avoid deterioration of the water quality of the water supplied to the wet purification unit in the outside air treatment device in which the wet purification unit is arranged on the downstream side of the outside air cooling unit in the air supply air passage. The point is to provide technology that can improve energy efficiency.

The first characteristic configuration of the present invention is a supply air passage through which the outside air supplied to the air supply target space is passed by the wind power of the supply air fan.
An outside air cooling unit arranged in the supply air passage and cooling the outside air flowing through the supply air passage,
It is arranged on the downstream side of the outside air cooling unit in the air supply air passage, and the outside air passing through the air supply air passage is passed through a water film formed by the water supply to remove impurities from the outside air and come into contact with the outside air. It is an outside air treatment device equipped with a wet purification unit that drops water supply as drain water onto a drain pan.
Wherein the heat exchange from the wet gas cleaning portion and the drain water dropped to the drain pan lies in having a water cooling unit for cooling the water supplied to the wet purification unit.

According to this configuration, the water supply supplied to the wet purification unit can be cooled by the water supply cooling unit, so that the temperature rise of the treated outside air due to heat exchange with the water supply in the wet purification unit is suppressed, and the supply air air is supplied. It is possible to reduce the cooling load of the outside air at the outside air cooling unit in the road. Furthermore, instead of supplying the drain water directly to the wet purification unit as water supply, the water supply such as tap water cooled by heat exchange with the drain water is supplied to the wet purification unit, so that the wet water caused by the supply of the drain water is supplied. While preventing deterioration of the quality of the water supplied to the purification section, the cold heat of the drain water that was conventionally discharged as it is is effectively used to reduce the cooling load in the outside air cooling section and double energy saving. You can enjoy the effect.
Therefore, according to the present invention, in the outside air treatment device in which the wet purification unit is arranged on the downstream side of the outside air cooling unit in the air supply air passage, the energy efficiency is improved while avoiding the deterioration of the water quality of the water supply supplied to the wet purification unit. Can provide technology that can.

The second characteristic configuration of the present invention is the heat of the drain water flowing through the drain water channel and the water supplied to the wet purification unit in the drain water channel where the drain water is discharged from the drain pan as the water supply cooling unit. The point is that it is equipped with a drain channel heat exchange section for replacement.

According to this configuration, in the drain channel provided outside the wet purification section, the drain channel heat exchange section that exchanges heat between the drain water flowing through the drain channel and the water supplied to the wet purification section is provided. The drain water channel heat exchange unit can be provided and used as the water supply cooling unit. As a result, the water supply can be appropriately cooled by heat exchange with the drain water without changing the internal configuration of the wet purification unit from the conventional one.

The third characteristic configuration of the present invention includes, as the water supply cooling unit, a drain pan heat exchange unit that exchanges heat between the drain water stored in the drain pan and the water supplied to the wet purification unit in the drain pan. It is at the point.

According to this configuration, in the drain pan, the drain pan heat exchange unit for heat exchange between the drain water stored in the drain pan and the water supply can be provided, and the drain pan heat exchange unit can be used as the water supply cooling unit. .. As a result, the supply water can be appropriately cooled by heat exchange with the drain water while omitting the pump for supplying the drain water to the drain pan heat exchange unit and its power.

The fourth characteristic configuration of the present invention is a bypass path capable of bypassing the water supply cooling unit and supplying water to the wet purification unit.
The point is that the distribution state adjusting means capable of adjusting the distribution state of the water supply to the water supply cooling unit and the bypass path is provided.

According to this configuration, by providing the bypass path and the distribution state adjusting means, the water supply to the wet purification unit is adjusted in the form of adjusting the distribution state of the water supply to the water supply cooling unit and the bypass path bypassing the bypass path. The temperature can be adjusted.

The fifth characteristic configuration of the present invention includes a supply water temperature detecting means for detecting the temperature of the supply water supplied to the wet purification unit, and a water supply temperature detecting means.
The point is that the water supply temperature controlling means for controlling the distribution state adjusting means is provided based on the detection result of the water supply temperature detecting means.

According to this configuration, by providing the water supply temperature control means, the distribution state of water supply to the water supply cooling unit and the bypass path bypassing the water supply cooling unit is automatically controlled based on the detection result of the water supply temperature detection means. The temperature of the supply water supplied to the wet purification unit can be maintained at an appropriate level.

Schematic block diagram of outside air processing equipment Schematic configuration diagram of the wet purification module provided in the outside air treatment device shown in FIG. Schematic block diagram of the outside air processing apparatus of another embodiment

An embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the outside air processing device of the present embodiment includes an air supply air passage 1 in which an air supply fan 2 is arranged. Then, the outside air OA is introduced into the supply air passage 1 by the wind power of the supply air fan 2, the introduced outside air OA passes through the inside of the supply air passage 1, and the passed outside air OA serves as the supply air SA. , It is supplied to the air supply target space such as indoors.

In the air supply air passage 1, a wet purification module 10 (an example of a wet purification unit) is arranged in which an outside air OA is passed through a water film to remove impurities such as chemical substances and dust from the outside air. Further, in the supply air passage 1, a plurality of heat exchangers 3, 4, and 5 for cooling or heating the outside air OA flowing inside by heat exchange with cold water, hot water, etc. supplied from the outside are arranged. Has been done. As the heat exchangers 3, 4, and 5, preheating heat exchangers 3, cooling heat exchangers 4 (an example of an outside air cooling unit), reheating heat exchangers 5, and the like are arranged in order from the upstream side. There is. The wet purification module 10 is arranged in the region between the cooling heat exchanger 4 and the reheat heat exchanger 5.
That is, the outside air OA introduced into the air supply air passage 1 passes through the preheating heat exchanger 3, the cooling heat exchanger 4, the wet purification module 10, and the reheating heat exchanger 5 in this order, and then serves as the air supply SA. It is supplied to the air supply target space.

For example, in summer when the temperature of the outside air OA is high, the outside air OA introduced into the air supply air passage 1 is cooled in the cooling heat exchanger 4 and then passes through the wet purification module 10 to remove impurities. Will be done. Then, the outside air OA from which impurities have been removed after being cooled in this way is supplied to the air supply target space as the supply air SA.
On the other hand, in winter or the like when the temperature of the outside air OA is low, the outside air OA introduced into the air supply air passage 1 is heated in the preheating heat exchanger 3 and then passes through the wet purification module 10 to remove impurities. Will be done. Then, the outside air OA from which impurities have been removed after being heated in this way is appropriately heated in the reheat heat exchanger 5 and then supplied to the air supply target space as the supply air SA.

As shown in FIG. 2, the wet purification module 10 includes a water film forming portion 15 on which a water film is formed. The water film forming portion 15 includes a breathable element 16 made of a porous ceramic or the like, a water sprinkling pipe 17 to which a water supply SW is supplied from the water supply pipe 20 and sprinkles the water supply SW to the upper end portion of the element 16, and an element 16. It is configured to have a drain pan 18 that receives the drain water DW dripping from the lower end portion of the above.

In the wet purification module 10, the water supply SW is sprinkled from the sprinkler pipe 17 to the upper end of the element 16, so that water is supplied to the entire element 16 and a water film is formed on the surface of the element 16. Then, when the outside air OA passing through the element 16 comes into contact with the water film formed on the surface of the element 16, impurities contained in the outside air OA are removed in a form of being absorbed by the water film. become. Further, the water that has absorbed the impurities is dropped as drain water DW from the lower end portion of the element 16 and stored in the drain pan 18.
Then, as shown in FIG. 1, the drain water DW stored in the drain pan 18 is discharged to the outside through the drain pipe 30 (an example of the drain water channel) by operating the drain pump 31.

In the present embodiment, the wet purification module 10 is configured as a one-stage type in which one water film forming portion 15 is arranged along the flow direction of the outside air OA, but a plurality of wet purification modules 10 are arranged along the flow direction of the outside air OA. A multi-stage system in which the water film forming portions 15 are arranged side by side may be used. Further, in that case, the water supply SW can be individually supplied to each water film forming portion 15, but for example, the drain water DW of a part of the water film forming portion 15 is sprinkled on the other water film forming portion 15. It may be configured to do so.

In the wet purification module 10, water of a predetermined set water supply amount or more is supplied to the sprinkler pipe 17 through the water supply pipe 20. Here, the set water supply amount is set as the minimum water supply amount or more water supply amount necessary for maintaining the ability of the water film forming portion 15 to remove impurities from the outside air OA to be suitable.

In the above-mentioned outside air treatment device, for example, during cooling in summer, the outside air OA cooled by the cooling heat exchanger 4 passes through the water film forming portion 15 of the wet purification module 10. As a result, the drain water DW having a relatively low temperature is dropped from the water film forming portion 15.
The outside air treatment device of the present embodiment appropriately recovers the cold heat of such low-temperature drain water DW to improve energy efficiency while avoiding deterioration of the water quality of the water supply SW supplied to the wet purification module 10. It has a configuration for planning, and the configuration will be described below.

In the outside air treatment device of the present embodiment, as shown in FIG. 1, the water film forming portion 15 is passed through the sprinkler pipe 17 by heat exchange with the low-temperature drain water DW dropped from the water film forming portion 15 of the wet purification module 10. A water supply cooling unit 40 for cooling the water supply SW supplied to the water supply SW is provided. Therefore, the drain water DW whose water quality may have deteriorated is not supplied to the water film forming portion 15 as it is, but the tap water whose water quality is good and whose temperature has become low due to heat exchange with the drain water DW. Will be supplied as a water supply SW. Then, the low-temperature outside air OA cooled by the cooling heat exchanger 4 passes through the water film forming portion 15 in which the water film is formed by the low-temperature water supply SW, and enters the air supply target space while maintaining the low temperature state. It will be supplied. As a result, the cooling load for cooling the outside air OA in the cooling heat exchanger 4 is set low, and the energy efficiency is improved.

Further, in the drain pipe 30 from which the drain water DW is discharged from the drain pan 18, the water supply cooling unit 40 heats the drain water DW flowing through the drain pipe 30 and the water supply SW supplied to the water film forming unit 15. It is composed of a drain water channel heat exchange unit 40A for replacement. The drain water channel heat exchange unit 40A is composed of a liquid-liquid type heat exchanger that exchanges heat between the two liquids of the drain water DW and the water supply SW. In the outside air treatment apparatus of the present embodiment, the drain water channel heat exchange unit 40A is provided as the water supply cooling unit 40, so that the general-purpose product is used as the wet purification module 10 without changing the internal structure.

The drain water channel heat exchange section 40A is bypassed in the water supply pipe 20 in a form of branching from the upstream end portion of the main water supply pipe 20A passing through the drain channel heat exchange section 40A and merging at the downstream end portion. A bypass pipe 20B (an example of a bypass path) capable of supplying a water supply SW is provided in the water film forming portion 15 of the wet purification module 10. Further, as a distribution state adjusting means capable of adjusting the distribution state of the water supply SW to the main water supply pipe 20A and the bypass pipe 20B passing through the drain water channel heat exchange section 40A, the branch portion between the main water supply pipe 20A and the bypass pipe 20B is provided. A three-way control valve 22 is provided. The three-way control valve 22 is configured to be able to distribute the supplied water supply SW to the drain channel heat exchange section 40A side and the bypass pipe 20B side, and to adjust the distribution ratio as the above distribution state.

Then, the distribution ratio is adjusted by the three-way adjusting valve 22 so as to reduce the amount of the water supply SW flowing through the drain water channel heat exchange unit 40A and increase the amount of the water supply SW flowing through the bypass pipe 20B. , The temperature of the water supply SW supplied to the water film forming portion 15 can be raised. On the contrary, the distribution ratio is adjusted by the three-way adjusting valve 22 so as to increase the amount of the water supply SW flowing through the drain water channel heat exchange unit 40A and decrease the amount of the water supply SW flowing through the bypass pipe 20B. Therefore, the temperature of the water supply SW supplied to the water film forming portion 15 can be lowered.
Further, in the water supply pipe 20, a temperature sensor 21 (water supply temperature detecting means) for detecting the temperature of the water supply SW supplied to the water film forming portion 15 is on the downstream side of the confluence portion between the main water supply pipe 20A and the bypass pipe 20B. An example) is provided.

As shown in FIG. 1, the outside air processing device is provided with a control device 50 for controlling operation. The control device 50 functions as an air-conditioning control means 51 that executes a predetermined air-conditioning control and a water supply temperature control means 52 that executes a predetermined water supply temperature control by executing a predetermined program.
Hereinafter, the details of the air conditioning control means 51 and the water supply temperature control means 52 will be described in order with reference to FIGS. 1 and 3.

[Air conditioning control]
In the air conditioning control executed by the air conditioning control means 51, first, the temperature and humidity of the supply air SA supplied from the supply air passage 1 to the air supply target space, the number of personnel generating heat in the air supply target space, and the production equipment. Calculate the air conditioning load based on the operating rate, etc. Then, based on the air conditioning load calculated in this way, the air supply target space is controlled in a form in which the supply amount of the heat medium to the heat exchangers 3, 4, and 5 is controlled and the air supply amount of the air supply fan 2 is controlled. Adjust the temperature and humidity to the desired temperature and humidity. That is, as the air conditioning load becomes smaller, the air conditioning control means 51 adjusts the supply amount of the heat medium to the heat exchangers 3, 4, and 5 to the decreasing side, and adjusts the air blowing amount of the air supply fan 2 to the decreasing side. It is configured as follows.
In this embodiment, an example of the above-mentioned method for calculating the air conditioning load is shown, but it may be changed as appropriate.

[Water supply temperature control]
In the water supply temperature control executed by the water supply temperature control means 52, the main water supply passing through the drain water channel heat exchange unit 40A is based on the detection result of the temperature sensor 21 that detects the temperature of the water supply SW supplied to the water film forming unit 15. It controls a three-way adjusting valve 22 that can adjust the distribution state of the water supply SW to the pipe 20A and the bypass pipe 20B.
Specifically, the water supply temperature control means 52 receives, for example, the target air supply temperature of the supply air SA to be supplied to the air supply target space from the air conditioner control means 51, and the water film forming unit 15 detected by the temperature sensor 21. The main water supply pipe 20A and the bypass pipe that pass through the drain water channel heat exchange section 40A by the three-way adjusting valve 22 so that the temperature of the water supply SW to the water supply SW is maintained at the target water supply temperature set to, for example, the target air supply temperature or lower. It is configured to automatically control the distribution state of the water supply SW with respect to 20B. The target water supply temperature of the water supply SA to the water film forming portion 15 may be appropriately changed, for example, by setting it based on the outside air, the state of the room, and the like.

[Another Embodiment]
Other embodiments of the present invention will be described. It should be noted that the configuration of each embodiment described below is not limited to the one applied independently, and can be applied in combination with the configuration of other embodiments.

(1) In the above embodiment, the water supply cooling unit 40 that cools the water supply SW by heat exchange with the drain water DW is configured by the drain water channel heat exchange unit 40A, but the water supply cooling unit 40 has a different configuration from the above embodiment. The embodiment of the outside air treatment apparatus adopting the above will be described below with reference to FIG.
In the outside air treatment apparatus shown in FIG. 3, the water supply cooling unit 40 drops from the water film forming unit 15 in the drain pan 18 and supplies it to the water film forming unit 15 through the drain water DW stored in the drain pan 18 and the sprinkler pipe 17. It is composed of a drain pan heat exchange unit 40B that exchanges heat with the water supply SW. The drain pan heat exchange unit 40B is composed of a heat transfer tube laid in the drain pan 18 in which the drain water DW is stored and the water supply SW is supplied to the inside. In this outside air treatment device, by providing the drain pan heat exchange unit 40B as the water supply cooling unit 40, the pressure loss in the drain pipe 30 can be suppressed to a low level, and for example, a drain pump for discharging the drain water DW ( The drain water DW can be discharged by its own weight by omitting the drain pump 31 in FIG. 1).
In FIG. 3, the drain pan heat exchange section 40B is composed of a heat transfer tube laid in the drain pan 18, but it may be composed of a heat transfer tube laid along the outer surface of the bottom or side of the drain pan 18. I do not care.

(2) In the above embodiment, the three-way control valve 22 is configured so that the distribution ratio of the water supply SW between the drain water channel heat exchange section 40A side and the bypass pipe 20B side can be adjusted. It can also be configured to be switchable between the drain water channel heat exchange section 40A side and the bypass pipe 20B side, in other words, whether or not the water supply SW is bypassed to the drain channel heat exchange section 40A. In this case, by switching the supply destination of the water supply SW to the bypass pipe 20B side, the temperature of the water supply SW supplied to the water film forming portion 15 can be raised, and the supply destination of the water supply SW can be set to the drain channel heat exchange portion 40A. By switching to, the temperature of the water supply SW supplied to the water film forming portion 15 can be lowered.

(3) In the above embodiment, the three-way method provided with the water supply temperature control means 52 and functions as a distribution state adjusting means capable of adjusting the distribution state of the water supply SW to the main water supply pipe 20A and the bypass pipe 20B passing through the water supply cooling unit 40. Although the regulating valve 22 is configured to be automatically controlled, the three-way regulating valve 22 may be manually operated to adjust the temperature of the water supply SW supplied to the water film forming portion 15.
Further, a bypass pipe 20B capable of bypassing the water supply cooling unit 40 and supplying the water supply SW to the water film forming unit 15 and a three-way adjusting valve 22 capable of adjusting the distribution state of the water supply SW to the water supply cooling unit 40 and the bypass pipe 20B. May be omitted or modified as appropriate.

(4) In the above embodiment, an example in which the sprinkler pipe 17, the water film forming portion 15, the drain pan 18 and the like are modularized as a wet purification module 10 and mounted on the outside air treatment device has been described, but each of these parts is individually mounted as a single unit. It may be configured to be provided in the outside air processing device.

1 Air supply air passage 2 Air supply fan 4 Cooling heat exchanger (outside air cooling unit)
10 Wet purification module (wet purification unit)
18 Drain pan 20 Water supply pipe 20A Main water supply pipe 20B Bypass pipe (bypass path)
21 Temperature sensor (water supply temperature detecting means)
22 Three-way adjustment valve (distribution state adjustment means)
30 Drain pipe (drain channel)
40 Water supply cooling unit 40A Drain water channel heat exchange unit 40B Drain pan heat exchange unit 52 Water supply temperature control means DW Drain water OA Outside air SA Supply air SW Water supply

Claims (5)

The air supply air passage through which the outside air supplied to the air supply target space is passed by the wind power of the air supply fan,
An outside air cooling unit arranged in the supply air passage and cooling the outside air flowing through the supply air passage,
It is arranged on the downstream side of the outside air cooling unit in the air supply air passage, and the outside air passing through the air supply air passage is passed through a water film formed by the water supply to remove impurities from the outside air and come into contact with the outside air. It is an outside air treatment device equipped with a wet purification unit that drops water supply as drain water onto a drain pan.
Wherein the heat exchange with the drain water dropped to the drain pan from the wet purification unit, the outside air treatment apparatus having a water cooling unit for cooling the water supplied to the wet purification unit. As the water supply cooling unit, in the drain water channel where drain water is discharged from the drain pan, a drain water channel heat exchange unit that exchanges heat between the drain water flowing through the drain water channel and the water supply supplied to the wet purification unit is provided. The outside air treatment device according to claim 1. The first or second aspect of the present invention, wherein the water supply cooling unit includes a drain pan heat exchange unit that exchanges heat between the drain water stored in the drain pan and the water supplied to the wet purification unit in the drain pan. Outside air processing equipment. A bypass path capable of bypassing the water supply cooling unit and supplying water to the wet purification unit,
The outside air treatment device according to any one of claims 1 to 3, further comprising a distribution state adjusting means capable of adjusting a distribution state of water supply to the water supply cooling unit and the bypass path. A water supply temperature detecting means for detecting the temperature of the water supply supplied to the wet purification unit,
The outside air treatment apparatus according to claim 4, further comprising a water supply temperature controlling means for controlling the distribution state adjusting means based on the detection result of the water supply temperature detecting means.

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