JP2002147794A - Dehumidifying air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dehumidifying air conditioner which supplies a room with air high in comfortableness. SOLUTION: This dehumidifying air conditioner is equipped with a dehumidifying rotor 2 which is desorbed by the air heated by a heater 8 or the like, and a heat exchanging element 4 which performs heat exchange between the two passages. This passes the air dried with the dehumidifying rotor 2 into one passage 12 of the heat exchanging element 4 so as to supply it into a room, passes the air from inside the room to the other passage 13 of the heat exchanging element 4, and sprays water to the other passage 13 of the heat exchanging element 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidifying air conditioner in which dry air is produced using a dehumidifying rotor, cooled, and supplied to a room.

[0002]

2. Description of the Related Art A dehumidifying air conditioner does not use chlorofluorocarbon and uses heat as a driving energy source, so it can use various kinds of energy such as gas combustion heat, exhaust heat or solar heat, thereby reducing carbon dioxide emissions. It has many features, such as being able to suppress power peaks in summer.

FIGS. 6 and 7 show a conventional dehumidifying air conditioner.
It is explained along. Reference numeral 1 denotes a blower that sends atmospheric OA to an adsorption zone 3 of a dehumidifying rotor 2. As a result, the temperature of the air rises due to the heat of adsorption and becomes dry air. Here, the dehumidifying rotor 2 is formed by supporting a hygroscopic agent such as silica gel or zeolite on paper formed in a honeycomb (honeycomb) shape, and is rotated by a motor (not shown) via a belt or the like (not shown). It is driven. The dehumidifying rotor 2 has a shape as shown in FIG.

[0004] The air that has exited the adsorption zone 3 of the dehumidifying rotor 2 passes through a rotary sensible heat exchange element 4. Here, the rotary sensible heat exchange element 4 is a thin plate made of aluminum or the like formed in a honeycomb shape, and is rotationally driven by a motor (not shown) via a belt or the like (not shown). The rotary sensible heat exchange element 4 also has a shape as shown in FIG.

The dried air whose temperature has risen out of the adsorption zone 3 exchanges heat with the rotary sensible heat exchange element 4 in the cooling zone 5, and the temperature of the dry air decreases and the dry sensible heat exchange element 4 The temperature drops. The dried and cooled air is supplied indoors as product air SA.

The air RA from the room is humidified and cooled by the spray 6. The air whose humidity has risen and the temperature has fallen passes through the rotary sensible heat exchange element 4 and exchanges heat with the rotary sensible heat exchange element 4 in the heating zone 7. That is, the temperature of the air rises while cooling the rotary sensible heat exchange element 4.

The temperature of the humid air whose temperature has increased is further increased by the heater 8 and enters the desorption zone 9 of the dehumidifying rotor 2. Here, the moisture adsorbed on the dehumidifying rotor 2 is desorbed and released to the atmosphere as exhaust EA by the fan 10. Here, the heater 8 is a heat exchanger or an electric heater to which steam is sent.

[0008]

In the dehumidifying air conditioner described above, since the rotary sensible heat exchange element 4 is used as a means for cooling the dry air, a part of the air humidified by the spray 6 is converted to product air. There was a problem of bringing it to the SA side.

That is, the rotary sensible heat exchange element 4 is a honeycomb body, and has a shape in which thin tubes (flutes) are gathered.
Heat exchange is performed between the air passing through the flute and the sheets constituting the honeycomb body. In the heating zone 7, low-temperature and high-humidity air passes through the flute. Low-temperature and high-humidity air remains in the flute immediately after moving from the heating zone 7 to the cooling zone 5. The moisture of the low-temperature and high-humidity air favors the high-temperature dry air passing through the cooling zone 5 and gives moisture to the high-temperature dry air.

For this reason, although the temperature of the supplied air drops, there is a problem that the humidity rises and the air does not become very comfortable. In particular, in order to increase the energy efficiency by lowering the temperature of the heater 8 as much as possible, the absolute humidity of the dry air produced by the dehumidifying rotor 2 is 1 g /
Make efforts to lower even Kg. In such a situation, if moisture is mixed into the dry air, there is a problem that the overall energy efficiency is reduced. The present invention has been made to solve the above problems, and has as its object to provide a dehumidifying air conditioner capable of supplying air with high efficiency and high comfort.

[0011]

Means for Solving the Problems In order to solve the above problems, the present invention comprises a dehumidifying rotor which is desorbed by heated air and a heat exchange element for performing heat exchange between two flow paths, The air dried by the dehumidifying rotor is supplied to the room through one passage of the heat exchange element, and the air from the room is supplied to the other passage of the heat exchange element and water is supplied to the other passage of the heat exchange element. It is something to do.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention comprises a dehumidifying rotor desorbed by heated air and a heat exchange element for exchanging heat between two flow paths. Dry air is supplied into the room through one passage of the heat exchange element, and air from the room is passed through the other passage of the heat exchange element, and water is supplied to the other passage of the heat exchange element. The water in the other passage of the heat exchange element evaporates, thereby cooling the other passage together with the other passage, and cooling the air passing through the one passage without humidifying. Having.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a dehumidifying air conditioner according to the present invention will be described in detail with reference to FIGS. Here, blower 1, dehumidifying rotor 2, adsorption zone 3, spray 6,
The heater 8, the desorption zone 9, and the blower 10 are the same as those shown in FIG. 6 showing a conventional dehumidifying air conditioner, and redundant description is omitted to avoid redundancy.

Numeral 11 denotes an orthogonal sensible heat exchange element, as shown in FIG. 2, in which an aluminum foil or a synthetic resin film formed in a wave shape and a flat aluminum foil or a synthetic resin film are alternately arranged and the wave direction is alternately changed. It is configured to be laminated so that Thereby, the orthogonal sensible heat exchange element 11 has the first passage 12 and the second passage 13 orthogonal to each other, and sensible heat exchange is performed between the respective passages. Further, the gases passing through the two passages do not mix with each other.

One passage 12 of the orthogonal sensible heat exchange element 11
The air communicates with the adsorption zone 3 of the dehumidifying rotor 2 and the air that has flowed out of one of the passages 12 of the orthogonal sensible heat exchange element 11 becomes product air SA. Spray 6 is orthogonal sensible heat exchange element 11
The outlet of the other passage 13 of the orthogonal sensible heat exchange element 11 communicates with the heater 8.

The outlet of the heater 8 communicates with the desorption zone 9 of the dehumidifying rotor 2, and the exit of the desorption zone 9 communicates with the suction port of the fan 10.

Embodiment 1 of the present invention is configured as described above, and its operation will be described below. First, power is supplied to the blower 1 and the blower 10 to supply water to the spray 6. In addition, the dehumidifying rotor 2 is rotated and the heater 8 is energized, or steam is sent to make the heater 8 generate heat.

The outside air OA is sent to the adsorption zone 3 of the dehumidifying rotor 2 by the blower 1 and becomes dry air, and the temperature rises due to heat of adsorption. The dried air whose temperature has risen passes through one passage 12 of the orthogonal sensible heat exchange element 11.

One passage 12 of the orthogonal sensible heat exchange element 11
The dried air that has exited is heat-exchanged with the air passing through the other passage 13 to lower the temperature. The dried air having the lowered temperature is supplied indoors as supply air SA.

The room air RA is sucked by the blower 10 and first passes through the place where the spray 6 is installed. Since indoor air generally has a relative humidity of about 60 to 70%, water is vaporized and cooled by the spray 6.

The air cooled by the spray 6 passes through the other passage 13 of the orthogonal sensible heat exchange element 11. The amount of water sprayed by the spray 6 is equal to or greater than the amount of vaporization by spraying. As a result, water droplets enter the other passage 13 together with the air. Water droplets having a small diameter float in the air and enter the other passage 13, and water droplets having a large diameter fall into the other passage 13.

The small diameter water droplets floating in the air evaporate when the temperature in the other passage 13 rises due to heat exchange. In addition, a large water drop that has fallen into the other passage 13 is
The inner wall of the other passage 13 is wetted to form a thin layer of water.
This thin layer of water evaporates as the temperature of the inner wall of the other passage 13 rises due to heat exchange.

As described above, the temperature in the other passage 13 of the orthogonal sensible heat exchange element 11 decreases due to the heat of vaporization of water. Since heat is exchanged between the other passage 13 and the one passage 12, the temperature of the one passage 12 decreases.

The other passage 13 of the orthogonal sensible heat exchange element 11
Passes through the heater 8. Here heater 8
Is a gas burner that burns combustible gas such as natural gas or propane gas, a radiator or an electric heater through which steam or hot water is passed. Alternatively, if the heater 8 is a heating means, it may be a means such as a high-temperature exhaust gas from another combustion device or a mixed gas of the high-temperature exhaust gas and air.

The air heated by the heater 8 passes through the desorption zone 11 of the dehumidifying rotor 2 and passes through the dehumidifying rotor 2.
The moisture adsorbed by the desiccant is desorbed and discharged to the atmosphere by the blower 10 as exhaust EA. In this manner, the outside air OA is supplied to the room as dry and cool air, and the air RA from the room is released to the atmosphere as high-temperature and high-humidity air.

Hereinafter, a second embodiment of the dehumidifying air conditioner of the present invention will be described in detail with reference to FIG. Here, the blower 1, the dehumidifying rotor 2, the adsorption zone 3, the desorption zone 9, the blower 10, the orthogonal sensible heat exchange element 11, the first passage 12, and the second passage 13 are the same as those in the first embodiment. Therefore, the duplicate description will be omitted.

In the second embodiment, an exhaust passage 14 is provided from the outlet of the second passage 13 of the orthogonal sensible heat exchange element 11 to the suction port of the blower 10. A high-temperature exhaust gas communication port 15 for introducing exhaust gas from a gas turbine generator or the like is provided in a region communicating with the desorption zone 9. Further, the bottom surface of the exhaust passage 14 is inclined, and a drain pipe 16 is provided at the lowest portion.

The dehumidifying air conditioner according to the second embodiment of the present invention is configured as described above, and the operation thereof will be described below. First, power is supplied to the blower 1 and the blower 10 to supply water to the spray 6. In addition, the dehumidifying rotor 2 is rotated, and high-temperature exhaust gas such as a gas turbine generator is introduced into the high-temperature exhaust gas communication port 15.

The outside air OA is sent to the adsorption zone 3 of the dehumidifying rotor 2 by the blower 1 and becomes dry air, and the temperature rises due to heat of adsorption. The dried air whose temperature has risen passes through one passage 12 of the orthogonal sensible heat exchange element 11.

One passage 12 of the orthogonal sensible heat exchange element 11
The dried air that has exited is heat-exchanged with the air passing through the other passage 13 to lower the temperature. The dried air having the lowered temperature is supplied indoors as supply air SA.

The indoor air RA is sucked by the blower 10 and first passes through the place where the spray 6 is installed. Since indoor air generally has a relative humidity of about 60 to 70%, water is vaporized and cooled by the spray 6.

The air cooled by the spray 6 passes through the other passage 13 of the orthogonal sensible heat exchange element 11. The amount of water sprayed by the spray 6 is equal to or greater than the amount of vaporization by spraying. As a result, water droplets enter the other passage 13 together with the air. Water droplets having a small diameter float in the air and enter the other passage 13, and water droplets having a large diameter fall into the other passage 13.

The small diameter water droplets floating in the air evaporate when the temperature in the other passage 13 rises due to heat exchange. In addition, a large water drop that has fallen into the other passage 13 is
The inner wall of the other passage 13 is wetted to form a thin layer of water.
This thin layer of water evaporates as the temperature of the inner wall of the other passage 13 rises due to heat exchange.

As described above, the temperature in the other passage 13 of the orthogonal sensible heat exchange element 11 decreases due to the heat of vaporization of water. Since heat is exchanged between the other passage 13 and the one passage 12, the temperature of the one passage 12 decreases. The air that has passed through the other passage 13 of the orthogonal sensible heat exchange element 11 is discharged to the atmosphere by the blower 10 through the exhaust passage 14.

The high-temperature exhaust gas is supplied to the high-temperature exhaust gas communication port 15.
, And passes through the desorption zone 9 to desorb the moisture adsorbed on the dehumidifying rotor 2. The exhaust gas that has passed through the desorption zone 9 becomes a humid gas and is released to the atmosphere by the blower 10.

Water droplets dropped from the orthogonal sensible heat exchange element 11 accumulate at the bottom of the exhaust passage 14. Since the bottom of the exhaust passage 14 is inclined, the dropped water moves to the lower side,
It is led out through the drain pipe 16.

Hereinafter, a third embodiment of the dehumidifying air conditioner of the present invention will be described in detail with reference to FIG. Here, the blower 1, the dehumidifying rotor 2, the adsorption zone 3, the desorption zone 9, the blower 10, the orthogonal sensible heat exchange element 11, the first passage 12, the second passage 13, and the heater 8 are the same as those of the first embodiment. The exhaust passage 14 is the same as that of the above-described second embodiment, and redundant description will be omitted.

In FIG. 4, reference numeral 17 denotes a partition plate, which partially divides the entrance of the other passage 13 of the orthogonal sensible heat exchange element 11. The spray 6 is provided in a part of the entrance of the other divided passage 13 to form a cooling passage 18. The spray amount by the spray 6 is set to a state in which fine particles of water float in air having a relative humidity of 100%.

The exhaust passage 14 extends from the outlet of the cooling passage 18 to the suction side of the blower 10. And exhaust passage 1
In the middle of 4, a valve 19 for opening and closing the exhaust passage 14 or adjusting the amount of air passing therethrough is provided.

The dehumidifying air conditioner according to the third embodiment of the present invention is configured as described above, and the operation thereof will be described below. Activate the blower 20 and then turn on the heater 8 such as a gas burner.
And send water to spray 6. Then, the outside air OA is sucked into the blower 1 and enters the blower 1, is pushed out by the blower 1 and enters the adsorption zone 3 of the dehumidifying rotor 2. here,
The humidity of the outside air is adsorbed by the dehumidifying rotor 2 to become dry air, and the temperature rises due to heat of adsorption.

The heated dry air enters one passage 12 of the orthogonal sensible heat exchange element 11. Here, the dry air gives its sensible heat to the orthogonal sensible heat exchange element 11 and its temperature falls. That is, the temperature of the dry air that has exited the one passage 12 of the orthogonal sensible heat exchange element 11 decreases due to the heat of vaporization of the water sprayed by the spray 6, and is supplied into the room as comfortable supply air SA.

The indoor air RA enters the other passage 13 of the orthogonal sensible heat exchange element 11 by suction of the blower 10.
At this time, since the inside of the exhaust passage 14 is also at a negative pressure, the room air RA also enters the cooling passage 18. The air in the cooling passage 18 is humidified by the spray 6 to lower the temperature, and fine particles of water are floating. The inner surface of the cooling passage 18 is wet with water.

The fine particles of water and the water which wets the inner surface of the cooling passage 18 are vaporized by the air passing through the one passage 12 of the orthogonal sensible heat exchange element 11 while passing through the cooling passage 18, and take away heat of vaporization and exhaust. Enter the passage 14. Since only sensible heat exchange is performed between the one passage 12 and the other passage 13 of the orthogonal sensible heat exchange element 11 and there is no mixing of both gases, the air in one passage 12 and the cooling passage 18 There is no mixing with the air inside. Therefore, the air passing through the one passage 12 of the orthogonal sensible heat exchange element 11 is cooled without being humidified.

The other passage 13 of the orthogonal sensible heat exchange element 11
Is exchanged with dry air whose temperature has increased due to the heat of adsorption of the dehumidifying rotor 2, and the temperature rises, and the temperature further rises by the heater 8 to become high-temperature air. This high-temperature air passes through the desorption zone 11 of the dehumidification rotor 2 and desorbs moisture contained in the dehumidification rotor 2. The hot and humid air exiting the desorption zone 11 of the dehumidifying rotor 2 is
, And is emitted as exhaust EA to the atmosphere. The air that has passed through the exhaust passage 14 is also discharged as exhaust EA to the atmosphere by the blower 10 together with the high-temperature and high-humidity air that has exited the desorption zone 11 of the dehumidifying rotor 2.

By adjusting the valve 19, the amount of air flowing into the exhaust passage 14 can be adjusted, and the temperature of the supply air SA can be controlled by this adjustment and the amount of spray from the spray 6.

FIG. 5 is a sectional view showing a fourth embodiment of the present invention. The fourth embodiment shown in FIG. 5 is different from the third embodiment shown in FIG. 4 in that a dedicated blower 20 for sucking out the air in the exhaust passage 14 is provided and the outside air introduction pipe 2 is provided.
1 is different in that the valve 19 is not provided.

That is, the dedicated blower 20 for the exhaust passage 14
The amount of air flowing into the exhaust passage 14 can be controlled by controlling the blower 20.

FIG. 5 shows the cooling passage 18.
Has an outside air introduction pipe 21 for directly introducing outside air OA into the air. When a ventilation fan or the like (not shown) is installed in the room and the amount of return air RA from the room is smaller than the amount of air SA supplied to the room, the outside air OA is directly sent to the cooling passage 18 from the outside air introduction pipe 21. Good to supply.

Alternatively, if a large amount of moisture is generated in the room, the humidity of the return air RA from the room is higher than that of the outside air. In such a case, if the outside air OA is supplied directly to the cooling passage 18 from the outside air introduction pipe 21, cooling is performed. The cooling effect in the passage 18 is high.

Further, the humidifying element 2 shown in FIG.
2 are installed. The humidifying element 22 has air permeability and a high water retention capacity such as a non-woven fabric, and the tip of the humidifying element 22 projects into the cooling passage 18 so that water is supplied by spray water from the spray 6. .

Thus, the air exiting from one of the passages 12 of the orthogonal sensible heat exchange element 11 is humidified and cooled, and the temperature further decreases. That is, the supply air SA has a slightly higher humidity but a lower temperature. This embodiment is suitable when the humidity of the outside air is low and the temperature is high.

In this embodiment, an example of a non-woven fabric is shown as the humidifying element 22. In addition, if the humidifying element 22 is hydrophilic, the non-woven fabric may be formed in a honeycomb shape, or may be formed in a coarse felt shape. Or a sponge having a large opening can be used.

In each of the embodiments described above, the orthogonal sensible heat exchange element 11 is used as the stationary heat exchange element. In addition, a counterflow heat exchange element, a heat exchange element using a heat pipe, or the like is used. be able to.

[0054]

The dehumidifying air conditioner of the present invention lowers the temperature of supplied air by sensible heat exchange.
Highly comfortable air can be supplied without increasing the humidity of the supply air. In the case where the indoor air that has passed through the stationary heat exchanger does not pass through the dehumidifying rotor as in the embodiment shown in FIGS. 3 to 6, for example, the indoor air has much contaminants such as cigarette smoke as in a game arcade. Even when used in a place where it is included, the indoor air does not come into contact with the dehumidification rotor, so that contamination of the dehumidification rotor can be prevented, and no contaminants in the room enter the supply air.

Further, both the exhaust heat recovery (cooling of the supply air by the indoor cool air) and the indirect evaporative cooling are performed by the static sensible heat exchange element, so that the entire apparatus can be realized compactly and at low cost.

In particular, since a stationary sensible heat exchange element is used as the heat exchanger, no moisture is brought in between the heat exchange gases, and the humidity of the supplied air can be kept low.

When the humidity of the outside air is low, humidification cooling can be added, and in this case, the temperature of the supply air can be further lowered.

Furthermore, when there is a source of moisture in the room and the humidity of the room air is higher than that of the outside air, if the outside air is passed through the other passage of the heat exchange element, the cooling effect is enhanced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a dehumidifying air conditioner of the present invention.

FIG. 2 is a perspective view of an orthogonal sensible heat exchange element used in the dehumidifying air conditioner of the present invention.

FIG. 3 is a sectional view showing a second embodiment of the dehumidifying air conditioner of the present invention.

FIG. 4 is a sectional view showing a third embodiment of the dehumidifying air conditioner of the present invention.

FIG. 5 is a sectional view showing a fourth embodiment of the dehumidifying air conditioner of the present invention.

FIG. 6 is a sectional view of a conventional dehumidifying air conditioner.

FIG. 7 is a perspective view of a dehumidifying rotor used in the present invention and a conventional dehumidifying air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blower 2 Dehumidification rotor 3 Adsorption zone 6 Spray 8 Heater 9 Desorption zone 10 Blower 11 Orthogonal sensible heat exchange element 12 First passage 13 Second passage 14 Exhaust passage 15 High-temperature exhaust gas communication port 16 Drain pipe 17 Partition plate 18 Cooling passage 19 valve

Claims (6)

[Claims] 1. A dehumidifying rotor desorbed by heated air and a heat exchange element for performing heat exchange between two flow paths, and air dried by the dehumidifying rotor passes through one passage of the heat exchange element. A dehumidifying air conditioner, wherein air is supplied indoors, air from the room passes through the other passage of the heat exchange element, and water is supplied to the other passage of the heat exchange element. apparatus. 2. The dehumidifying air conditioner according to claim 1, wherein the heat exchange element is a static sensible heat exchange element. 3. The dehumidifying air conditioner according to claim 1, wherein hot air from an exhaust heat source is applied to a part of the dehumidifying rotor. 4. The dehumidifying air conditioner according to claim 1, wherein the air flowing out of one of the passages of the heat exchange element is humidified. 5. The dehumidifying device according to claim 4, wherein the air discharged from one of the passages of the heat exchange element is humidified by a water spray nozzle for forming air in which fine particles of water pass through the other passage of the heat exchange element. Air conditioner. 6. The dehumidifying air-conditioning apparatus according to claim 1, wherein fine particles of water are suspended in the outside air and pass through a part of the other passage of the heat exchange element.