JPH06101930A - Air cooler using moisture absorbent - Google Patents

Abstract

PURPOSE:To improve air cooling efficiency by a method wherein a rotary moisture absorbing body is divided into a plurality of sections, heat exchanging spaces are formed in these sections and a heat pipe is provided with one end disposed in a heat exchanging space corresponding to an outside air introducing passage and the other end disposed in a specific position of a room air exhaust passage. CONSTITUTION:Rotary moisture absorbing bodies 3 (a and b) are provided between an outside air introducing passage 1 and a room air exhaust passage 2. An air cooler 10 and a cooler 11 are provided downstream of the rotary moisture absorbing body 3 in the outside air introducing passage 1. An air heater 14 is provided downstream of a room air exhaust fan 12b in the room air exhaust passage 2. In the aforesaid structure, the rotary moisture absorbing body 3 is divided into a plurality of sections and heat exchanging spaces 4 (a and b) are formed in these sections. Each heat pipe 15 (a and b) is provided with one end disposed in the heat exchanging space 4 corresponding to the outside air introducing passage 1 and the other end disposed upstream of the air heater 14 in the room air exhaust passage 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cooling device using a hygroscopic agent, a so-called desiccant cooler.

[0002]

2. Description of the Related Art An air cooling device using a hygroscopic agent, a so-called desiccant cooler, is constructed so that a rotary hygroscopic material filled with a hygroscopic agent is rotated across both sides of an outside air introducing passage and an indoor air introducing passage. The outside air introduction passage is provided with a sensible heat exchange type air cooler and a humidification evaporation type cooler on the downstream side of the rotary hygroscopic body, and an indoor air discharge passage is provided with an air heater.

In such an air cooling device, the outdoor air that has flowed into the outside air introduction passage first passes through the moisture absorbing portion of the rotary hygroscopic body located in the outside air introduction passage, is absorbed by the moisture absorbent, and is dried. At this time, the temperature of the hygroscopic agent rises due to the heat of adsorption, and therefore the temperature of the air also rises. Therefore, the temperature of the air is lowered in the sensible heat exchange type air cooler, humidified and cooled in the humidification evaporative cooler, and then supplied to the room. On the other hand, the room air that has flowed into the room air outlet passage rises in temperature in the air heater and passes through the rotary moisture absorber to remove moisture absorbed from the outside air while it is located in the outside air introduction passage. After being removed from the hygroscopic agent and regenerated, it is led out of the room.

[0004]

As described above, when the hygroscopic agent absorbs moisture in the air, it generates heat of adsorption and the temperature of itself rises and the temperature of the air rises. The moisture absorption performance of the agent decreases as it goes downstream of the air flow. For this reason, if the outdoor air becomes hot and humid, the amount of moisture absorption required to perform the specified air cooling will not be obtained, and the temperature of the air that has passed through the hygroscopic body will also rise, so sensible heat exchange type air cooling Condition of blowout air in a normal air conditioner even after passing through the air conditioner and the humidification evaporative cooler (outdoor air 32 ℃ DB, RH65% blowout air temperature 18-22
℃, RH50%) is difficult to meet. As described above, since the desiccant cooler cannot always exhibit a predetermined cooling performance, it has been extremely rare to use the desiccant cooler in an air conditioner such as a general building.

Attempts have been made to increase the amount of hygroscopic agent by increasing the amount of hygroscopic agent to be filled, but when the amount of hygroscopic agent to be filled is large, the apparatus becomes large and heavy, and the heat loss is large. However, there is a problem that the air resistance increases and the efficiency decreases.

The present invention aims to solve the above problems.

In order to solve the above-mentioned problems, first, in the present invention, a rotary hygroscopic body filled with a hygroscopic agent is rotated across both sides of an outside air introducing passage and an indoor air introducing passage. In the outside air introduction passage, a sensible heat exchange type air cooler and a humidification evaporation type cooler are provided on the downstream side of the rotary moisture absorber, and an indoor air discharge passage is provided with an air heater. In the air cooling device using the hygroscopic agent, the rotary hygroscopic body is divided into a plurality of parts, and a heat exchange space is formed between them for heat exchange corresponding to the outside air introduction passage. One side of the heat pipe is located in the space portion, and the other side of the heat pipe is located in the air-air heat exchanger for circulating the indoor air upstream of the air heater in the indoor air discharge passage. An air cooling device is proposed.

Further, in the present invention, instead of the heat pipe, air-air heat for circulating the indoor air upstream of the air heater in the indoor air discharge passage in the space for heat exchange corresponding to the outside air introduction passage. We propose an air cooling device that constitutes an exchanger.

Further, in the present invention, it is proposed to provide an air heater in each of the heat exchange spaces corresponding to the indoor air discharge passage in the air cooling device having the above structure.

Further, according to the present invention, in the air cooling device having the above-mentioned structure, the rotary hygroscopic body constituted by being divided into a plurality of parts is provided with a predetermined temperature for the temperature of the air supplied to the room through the humidifying / evaporating cooler. We propose a structure in which the rotation speed is controlled so as to be maintained at. In this air cooling device, it is proposed that the rotary hygroscopic body, which is divided into a plurality of pieces, is configured so that the rotational speed thereof can be controlled independently.

[0010]

The outdoor air that has flowed into the outside air introduction passage first passes through the moisture absorbing portion of the most upstream rotary moisture absorber, is absorbed by the moisture absorbent and is dried, and its temperature rises due to the heat of adsorption.

The air that has passed through the moisture absorbing portion of the most upstream rotary moisture absorber reaches the space for heat exchange with the next moisture absorbing portion of the rotary moisture absorber, where the heat pipe or air-air heat is exchanged. After being cooled by exchanging heat with the indoor air on the upstream side of the air heater in the indoor air discharge passage through the exchanger, it flows into the moisture absorbing portion of the next rotary hygroscopic body. In this manner, the air is cooled in the heat exchange space before flowing into the moisture absorption portion of the next rotary moisture absorption body and sequentially passes through the moisture absorption portion of the rotary moisture absorption body on the downstream side to be absorbed and dried.

Since the air flowing into the moisture absorbing portion of the next rotary type moisture absorber on the downstream side is cooled as described above, the moisture absorbing performance of the moisture absorbing agent is not lowered and the moisture absorbing and drying are maintained while maintaining the high moisture absorbing performance. It can be performed.

Thus, in the present invention, the total amount of moisture absorption can be increased even when the total thickness of the moisture absorption portions of each rotary moisture absorber is made equal to the thickness of the moisture absorption portion of the conventional integrated rotary moisture absorber. Along with being able to, it is possible to further reduce the temperature of the air that has passed through the moisture absorbing portion of the rotary moisture absorber on the most downstream side,
Therefore, sufficient cooling performance can be exhibited.

On the other hand, the room air whose temperature has risen by exchanging heat with the air that has passed through the moisture absorbing portion in the heat exchange space is sufficiently heated by the air heater, and then the indoor air exhaust passage is formed. After passing through the rotary hygroscopic body located inside, the moisture absorbed from the outdoor air so far while being located in the outdoor air introduction passage is removed from the hygroscopic agent and regenerated, then it is led out to the outdoor. It That is, the amount of heat recovered by the heat exchange can be effectively utilized for the regeneration of the hygroscopic agent.

The air heater for heating the indoor air for regenerating the hygroscopic agent can be provided only on the upstream side of the rotary hygroscopic body located on the most upstream side with respect to the indoor air discharge passage, but each rotary type If it is provided for each heat exchange space between the hygroscopic bodies, the hygroscopic agent of the rotary hygroscopic body located on the most downstream side with respect to the indoor air discharge passage can be efficiently regenerated.

If the amount of air flowing through the outside air introduction passage and the indoor air discharge passage is constant, the amount of moisture absorbed and the amount of regeneration of the hygroscopic agent are proportional to the rotational speed of the rotary moisture absorber. Therefore, by controlling the rotation speed of the rotary hygroscopic body so as to maintain the temperature of the air supplied to the room through the humidification evaporative cooler at a predetermined temperature, the conditions of outdoor air, the desired room temperature, etc. The appropriate operation can be performed according to At this time, the rotary moisture absorbers can be controlled in detail independently of each other, so that fine control can be performed.

[0017]

EXAMPLES Examples of the present invention will be described below. First, Fig. 1
Corresponds to the embodiment of the present invention in which a heat pipe is used as the heat exchange means used to remove the heat of adsorption. In FIG. 1, reference numerals 1 and 2 respectively denote an outside air introduction passage and an indoor air discharge passage that communicate from the outside to the inside of the room, and these passages 1 and 2 constitute an adjacent portion on the outside of the room, and the inside of the room. In the above, they are configured with an appropriate distance. Then, in the adjacent portion, the outside air introduction passage 1 and the indoor air passage passage 2
The rotary hygroscopic body 3 is installed so as to rotate on both sides of. Three rotary moisture absorbers 3 are installed at a predetermined interval, and these are indicated by reference numerals 3a, 3b, 3c, respectively. Spaces 4a and 4b for heat exchange are provided between the rotary moisture absorbers 3a, 3b and 3c, respectively, and a partition 5 is provided at this location so that the outside air introduction passage 1 and the indoor air discharge passage 2 do not communicate with each other. Is provided. Therefore, the heat exchange space 4
The portions a and 4b are divided into a portion U corresponding to the outside air introduction passage 1 and a portion L corresponding to the indoor air outlet passage 2.

The rotary hygroscopic bodies 3a, 3b, 3c have a disk-shaped hygroscopic portion filled with a hygroscopic agent, and are configured so that air can pass through the hygroscopic portion in the axial direction. For example, the hygroscopic portion may be configured such that a large number of air-flowing portions in the axial direction are formed by stacking a plurality of portions filled with the hygroscopic agent in a sandwich shape, a honeycomb shape, or the like by partitioning in the axial direction. And the part filled with the moisture absorbent is, for example, processed into a fibrous form of a solid adsorbent such as silica gel, activated carbon or zeolite,
Or weaved into a fibrous material to make a composite material,
The solid adsorbent such as fine particles may be sandwiched by a wire net having a large opening area, or a liquid hygroscopic agent such as calcium chloride or lithium chloride may be impregnated to form an element. In addition to these configurations, the specific configurations of the rotary moisture absorbers 3a, 3b, 3c are appropriate.

The rotary moisture absorbers 3a, 3b, 3c are provided with a shaft 6
The shaft 6 is rotatably supported by a bearing 7. And, these rotary moisture absorbers 3a, 3b,
3c is configured to be rotationally driven by the drive device 8.
A specific configuration for rotationally driving the rotary moisture absorbers 3a, 3b, 3c is also appropriate. For example, these rotary moisture absorbers 3a, 3b
b and 3c can also be configured to rotate independently.

In the outside air introduction passage 1, the rotary moisture absorber 3
An air-air heat exchanger 9 for the indoor air outlet passage 2 is provided on the downstream side, and an air cooler 10 for cooling the air with cooling water is provided on the downstream side thereof. The air cooler 10 acts on the air flowing through the outside air introduction passage 1 as a sensible heat exchange type air cooler. A humidification evaporation type cooler 11 is installed on the downstream side of these sensible heat exchange type air coolers, and an outside air supply fan 12a is installed on the downstream side thereof.
Has been installed.

On the other hand, the indoor air outlet passage 2 is provided with an indoor air discharge fan 12b on the indoor side and is branched into two passages on the downstream side thereof, and one passage 2d is the air-air heat exchange. It is arranged so as to pass through the container 9. The other passage 2e is arranged so as to be close to the location of the outside air introduction passage 1 in which the rotary moisture absorber 3 is provided. The dampers 13d and 2d are respectively attached to these passages 2d and 2e.
13e is provided, and the rotary hygroscopic body 3 is joined to reach the location.

In the indoor air discharge passage 2 after the merging,
An air heater 14 for supplying heat source hot water is provided on the upstream side of the most upstream rotary moisture absorber 3c, and the heat exchange spaces 4a, 4 formed between the rotary moisture absorbers 3a, 3b, 3c.
Air heaters 14a, 14b for flowing the heat source hot water are also provided in the portion L of the b corresponding to the indoor air discharge passage 2, and these air heaters 14, 14a, 14b connect the heat source hot water passages in series. There is. At this time, the upstream side of the flow of the heat source hot water is the air heater 14a side.

On the other hand, the rotary moisture absorbers 3a, 3b, 3c
The heat pipes 15a, 15b are provided in the portion U of the heat exchange spaces 4a, 4b formed between the portions corresponding to the outside air introduction passage 1.
One side of this heat pipe 15
The other side of a and 15b is located in the passage 2d.
Further, one side of the heat pipe 15 is also positioned in the outside air introduction passage 1 on the downstream side of the rotary hygroscopic body 3c on the most downstream side, and the other side of the heat pipe 15 is set on the passage 2d.
It is located inside.

Temperature and humidity sensors 16a and 16b are provided on the outdoor side and the indoor side of the outside air introduction passage 1, and a temperature sensor 17 is provided on the indoor side of the indoor air discharge passage 2.

The operation of the present invention in the above configuration will be described with reference to the psychrometric chart of FIG. The outdoor air that has flowed into the outside air introduction passage 1, that is, the air in the state of the point a in FIG. 2, first passes through the moisture absorbing portion of the rotary moisture absorber 3a on the most upstream side in the axial direction,
Moisture is absorbed by the hygroscopic agent, the absolute humidity decreases, and the temperature rises due to the heat of adsorption, and the state changes to point b.

Next, the air discharged from the moisture absorbing portion of the rotary moisture absorbing body 3a reaches the heat exchange space portion 4a between the moisture absorbing portion of the next rotary moisture absorbing body 3b and the passage through the heat pipe 15a. The heat is exchanged with the room air flowing in 2d and is cooled and then flows into the moisture absorbing portion of the next rotary hygroscopic body 3b in a state where the state is changed from point b to point c. Then, in the rotary moisture absorber 3b, the temperature rises as it absorbs moisture and changes to the state of point d, and then in the heat exchange space 4b, it is cooled by the heat pipe 15b and changes to the state of point e. , Into the moisture absorption portion of the most downstream rotary moisture absorber 3c. Then, similarly to the above, the temperature of the rotary hygroscopic body 3c rises as it absorbs moisture in the moisture absorbing part, and the moisture flows out at the point f.

As can be seen from the above operation, in the present invention, a plurality of rotary moisture absorbers 3 are arranged from the upstream side to the downstream side,
When the moisture in the outdoor air is absorbed by sequentially flowing into the moisture absorbing portion of the rotary moisture absorbing body 3, the outdoor air flows into the heat absorbing space portion 4 before flowing into the moisture absorbing portion of the next rotary moisture absorbing body 3.
While being cooled, the moisture absorption performance of the hygroscopic agent filled in the moisture absorption portion of the downstream rotary type moisture absorber 3 is successively absorbed by the moisture absorption portion of the downstream rotary moisture absorber 3 to be absorbed and dried. It is possible to perform moisture absorption and drying while maintaining high moisture absorption performance without lowering the temperature.

The air at the point f flowing out from the moisture absorption portion of the rotary hygroscopic body 3c on the most downstream side in the figure is cooled by the heat pipe 15 provided on the downstream side to the state at the point g, and in this state It reaches the air-air heat exchanger 9 and exchanges heat with the indoor air in the state of the point j and at the time of exchanging heat with the cooling water in the air cooler 10 to be cooled to the point h. Then point h
The air in this state reaches the humidification evaporative cooler 11 where it is humidified, the temperature further lowers at isenthalpy and transitions to the state of point i, and is supplied to the room through the fan 12a in this state.

In the above operation, the ratio of the amount of indoor air flowing through the passages 2d and 2e is determined by the respective dampers 13d and 13e.
If the temperature of the air passing through the heat pipe 15 has dropped to a predetermined temperature, the
The air heat exchanger 9 and the air cooler 10 do not need to be operated, and these controls can be appropriately performed.

Next, the transition of the state of indoor air will be described. First, as described above, the room air in the state of the point j flows through the passage 2d and exchanges heat with the heat pipes 15a, 15b, 15 sequentially, and the temperature changes from the point j to the state of the points k, l, m. Next, the indoor air reaches the air heater 14 and exchanges heat with the heat source hot water flowing therethrough to be heated from the point m to the state n.

The room air thus heated to the temperature of the point n passes axially through the portion of the rotary moisture absorbent 3c located inside the indoor air discharge passage 2 in the moisture absorbing portion, and until then, reaches the outside air introduction passage. As described above, the moisture absorbed from the outdoor air is removed from the hygroscopic agent while it is located in position 1, and the regeneration is performed. Therefore, the temperature decreases and the humidity increases and the state changes to the point o, The space 4b for heat exchange with the next rotary moisture absorber 3b is reached.

Then, the air is heated again by the air heater 14b to rise to the temperature of the point p, and then passes through the moisture absorbing portion of the rotary hygroscopic body 3b in the axial direction to regenerate the hygroscopic agent,
As the temperature itself decreases, the humidity rises and becomes the state of point q, and thereafter, it is heated by the air heater 14a provided in the heat exchange space 4a to change from the point q to the point r, and the rotary moisture absorption. After the hygroscopic agent of the body 3a is regenerated to change from the point r to the state of the point s, it is discharged to the outside of the room.

As can be seen from the above operation, in the present invention, when the adsorbent of the plurality of rotary moisture absorbers 3 is regenerated by using the heated indoor air as the regenerating air, the indoor air as the regenerating air is Since the heating is performed by the air heater provided on the upstream side of the rotary hygroscopic body 3, the adsorbent can be satisfactorily regenerated by the indoor air that is sufficiently heated for all the rotary hygroscopic bodies 3. . Further, since the indoor air used as the regeneration air is preheated by the heat of adsorption through the heat pipes 15a, 15b, 15 before reaching the air heater 14, the moisture absorption performance of the rotary hygroscopic body 3 is improved. The heat of adsorption removed from the hygroscopic agent to maintain it can be effectively utilized for regeneration of the hygroscopic agent.

Next, FIG. 3 corresponds to an embodiment of the present invention in which an air-air heat exchanger is used as the heat exchange means used for removing the heat of adsorption. In this figure, the components denoted by the same reference numerals as those in FIG. 1 are the same as those in FIG. 1, and the description of the similar parts will be omitted.

In this embodiment, only two rotary moisture absorbers 3 are installed at a predetermined interval, and these are designated by reference numerals 3a and 3a.
It is shown by b. And these rotary type moisture absorbers 3a, 3
Air-air heat exchangers 18a and 18 are installed downstream of the heat exchange space 4a and the rotary moisture absorber 3b.

The indoor air outlet passage 2 is divided into three passages 2f, 2g, 2h on the downstream side of the fan 12b, and is joined before reaching the rotary hygroscopic body 3b. Dampers 13f, 13g, and 13h are provided on 2g and 2h, respectively. And passage 2
f and 2g are arranged so as to pass through the air-air heat exchangers 18a and 18, respectively, and the passage 2h is arranged so as to pass through the air-air heat exchanger 9.

On the other hand, the indoor air discharge passage 2 after merging
Is provided with an air heater 14 for flowing the heat source hot water on the upstream side of the rotary hygroscopic body 3b on the upstream side, and the room of the heat exchange space 4a formed between the rotary hygroscopic bodies 3a and 3b. An air heater 14a for flowing the heat source hot water is also provided in the portion L corresponding to the air discharge passage 2.
Reference numerals 4 and 14a connect heat source hot water passages in series. At this time, the upstream side of the flow of the heat source hot water is the air heater 14a side.

In the above structure, the outdoor air flowing into the outside air introduction passage 1 first passes through the moisture absorbing portion of the rotary moisture absorber 3a on the most upstream side in the axial direction, and the moisture is absorbed by the moisture absorbing agent to obtain the absolute humidity. While decreasing, the temperature rises due to the heat of adsorption and reaches the heat exchange space 4a from the moisture absorbing portion. Then, in the air-air heat exchanger 18a, heat is exchanged with the room air flowing through the passage 2f to be cooled. On the contrary, the indoor air flowing through the passage 2f is heated.

In this way, the outdoor air is cooled and flows into the moisture absorbing portion of the next rotary moisture absorber 3b, where it is further absorbed.
After the temperature rises and flows out from the moisture absorbing portion, it is cooled by exchanging heat with the room air flowing through the passage 2g in the air-air heat exchanger 18, and in this state, flows through the outside air introduction passage 1 to the downstream side, After being cooled by sensible heat exchange and humidification evaporation in the same manner as described above, it is supplied indoors.

On the other hand, the indoor air in the passages 2f and 2g whose temperature has risen in the air-air heat exchangers 18a and 18 due to the heat exchange with the outdoor air passes through the air-air heat exchanger 9 in the passage 2h. It merges with the room air and reaches the air heater 14,
Here, heat is exchanged with the heat source hot water to raise the temperature to a predetermined temperature. Then, the heated indoor air is used as the rotary moisture absorber 3
In b, the moisture absorption portion located on the indoor air discharge passage 2 side is passed in the axial direction, and moisture absorbed from the outdoor air is removed from the moisture absorbent to perform regeneration. Next, the heat exchange space 4a
Is heated again by the air heater 14a provided in
Next, the hygroscopic agent of 3a of the rotary hygroscopic body is regenerated, and the temperature of the hygroscopic agent decreases and the humidity of the hygroscopic agent rises and is discharged to the outside of the room.

In the operation of the embodiment of FIGS. 1 and 3 described above, assuming that the amount of air flowing through the outside air introduction passage 1 and the indoor air discharge passage 2 is constant, the amount of moisture absorption and the amount of regeneration of the hygroscopic agent. Is proportional to the rotation speed of the rotary moisture absorber 3. Therefore, by controlling the rotation speed of the rotary hygroscopic body 3 so as to maintain the temperature of the air supplied to the room at a predetermined temperature, the cooling capacity suitable for the conditions of the outdoor air, the desired room temperature, etc. Can drive. At this time, the rotary moisture absorbers 3a, 3b, 3c can be controlled in a finer manner by independently controlling the rotation speed.

[0042]

As described above, the present invention has the following effects. A plurality of rotary hygroscopic bodies are configured from the upstream side to the downstream side, and the hygroscopic performance of the hygroscopic agent filled in the hygroscopic parts of these rotary hygroscopic bodies is not deteriorated, while maintaining high hygroscopic performance to prevent the outdoor air Since moisture can be absorbed and dried, sufficient moisture can be absorbed and dried even when the outdoor air is in a high temperature and high humidity state. For this reason, in a conventional air cooling device using a hygroscopic agent, when the outside air is in a high temperature and humidity state, the temperature of the air supplied to the room can be cooled only up to about 25 ° C.
In the air cooling device of the present invention, it is possible to cool to a temperature of about 18 ° C. which is a supply temperature of a commonly used refrigerator such as an absorption type or an adsorption type. It can be easily performed by the rotation speed of the body, and highly efficient and energy-saving operation is possible. Therefore, while the conventional air cooling device using a hygroscopic agent is used only for auxiliary purposes, the air cooling device of the present invention is used alone as an air conditioning device for general buildings, homes, etc. It becomes possible to do. The heat of adsorption collected to maintain the hygroscopic performance of the hygroscopic agent is effectively utilized for the regeneration of the adsorbent, so the thermal efficiency is high. Therefore, it is possible to use exhaust heat or solar heat. Since it does not use a refrigerant such as CFC gas, it is effective for maintaining the global environment.

[Brief description of drawings]

FIG. 1 is an explanatory vertical sectional view showing an embodiment of the configuration of an air cooling device of the present invention.

FIG. 2 is a psychrometric chart showing an operation in the configuration of FIG.

FIG. 3 is an explanatory vertical cross-sectional view showing another embodiment of the configuration of the air cooling device of the present invention.

[Explanation of symbols]

 1 Outdoor air introduction passage 2 Indoor air discharge passage 2d, 2e, 2f, 2g, 2h Passage 3 (3a, 3b, 3c) Rotating moisture absorber 4 (4a, 4b) Heat exchange space 5 Partition 6 Shaft 7 Bearing 8 Drive Device 9 Air-air heat exchanger 10 Air cooler 11 Humidification evaporation type cooler 12a, 12b Fan 13d, 13e Damper 13f, 13g, 13h Damper 14, 14a, 14b Air heater 15, 15a, 15b Heat pipe 16a, 16b Temperature / humidity sensor 17 Temperature sensor 18, 18a, 18b Air-air heat exchanger

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideaki Terasawa 6-16-4 Oshima, Koto-ku, Tokyo Tokyo Gas Oshima Apartment No. 416

Claims (5)

[Claims] 1. A rotary hygroscopic body filled with a hygroscopic agent is configured to rotate over both sides of an outside air introducing passage and an indoor air introducing passage, and the outside air introducing passage has a downstream side of the rotating hygroscopic body. In the air cooling device using the hygroscopic agent, the sensible heat exchange type air cooler and the humidification evaporation type cooler are provided in the room air discharge passage, and the rotary hygroscopic body is used. Is divided into a plurality of parts, a heat exchange space is formed between them, and one side of the heat pipe is positioned in the heat exchange space corresponding to the outside air introduction passage. The air cooling device using a hygroscopic agent is characterized in that the side is located in a passage upstream of the air heater in the indoor air discharge passage. 2. A rotary hygroscopic body filled with a hygroscopic agent is configured to rotate over both sides of an outside air introduction passage and an indoor air discharge passage, and the outside air introduction passage has a downstream side of the rotary hygroscopic body. In the air cooling device using the hygroscopic agent, the sensible heat exchange type air cooler and the humidification evaporation type cooler are provided in the room air discharge passage, and the rotary hygroscopic body is used. Is divided into a plurality of parts, and a heat exchange space is formed between them, and a passage on the upstream side of the air heater in the indoor air discharge passage is formed in the heat exchange space corresponding to the outside air introduction passage. An air cooling device using a hygroscopic agent, characterized in that an air-air heat exchanger for circulating the indoor air inside is constructed. 3. The air cooling device according to claim 1, wherein the air heater is provided for each heat exchange space corresponding to the indoor air discharge passage. Cooling system 4. The air cooling device according to claim 1, 2 or 3, wherein the rotary hygroscopic body divided into a plurality of parts has a predetermined temperature of air supplied to the room through the humidification evaporative cooler. An air cooling device using a hygroscopic agent, characterized in that the rotation speed is controlled so as to maintain the temperature. 5. The air-cooling device according to claim 4, wherein the rotary hygroscopic body divided into a plurality of parts is configured so that the rotational speed thereof can be independently controlled. Air cooling system