JP2003166730A - Dehumidifying air conditioner - Google Patents

Abstract

(57) [Summary] [Object] To provide air conditioning using waste heat of an internal combustion engine or the like, and to provide a dehumidifying air conditioner with high use value even in an intermediate period such as spring or autumn. is there. A dehumidifying rotor for adsorbing moisture in the air.
And a sensible heat exchange element 4 for performing sensible heat exchange between the two passages, and provided with dampers D1 and D3 which can select either a high temperature or a low temperature as a temperature at which the dehumidifying rotor 2 is desorbed. 2 has a humidifying spray 11 for humidifying the air dried as required, and the air dried by the dehumidifying rotor 2 is supplied to the room at a reduced temperature by the sensible heat exchange element 4. The dehumidifying rotor 2 was detached at a low temperature, and the dry air was humidified as necessary to supply air at an appropriate temperature and humidity to the room.

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 for cooling and supplying air dehumidified by adsorption.

[0002]

2. Description of the Related Art Since a dehumidifying air conditioner can be driven by heat of about 80 ° C. to 150 ° C., waste heat can be used as a driving energy source, and humidity can be controlled to an appropriate value, which is comfortable and healthy. Since then, it has been attracting attention in recent years.

As a dehumidifying means of such a dehumidifying air conditioner, there are one using a moisture absorbent such as a lithium chloride solution and one using a moisture absorbent such as silica gel or zeolite. Of these, the latter is becoming the mainstream of popularization due to easy maintenance and simple structure of the device.

Further, in a dehumidifying air conditioner using a dehumidifying rotor carrying a moisture adsorbent, it is necessary to lower the temperature raised by the adsorption of moisture by exchanging heat with indoor air. For this reason, a combination of a dehumidifying rotor and a sensible heat exchange rotor has been developed. In the combination of the dehumidifying rotor and the sensible heat exchange rotor, the sensible heat exchange efficiency is not 100% if the sensible heat is simply exchanged between the dry air whose temperature has risen by adsorption and the indoor air. Rises.

For this reason, water is sprayed into the return air from the room to lower the temperature of the return air below the room temperature, and the sensible heat is exchanged between the humid air and the dry air, which have decreased in temperature, for drying. It was designed to generate low-temperature air and supply it to the room. However, this structure has a problem that the air is mixed between the humid air and the dry air, and the air whose humidity has been lowered is humidified.

To solve this problem, the applicant himself developed a combination of a dehumidifying rotor and an orthogonal sensible heat exchange element as shown in FIG. The dehumidifying air conditioner of FIG. 3 will be described below.

A blower 1 sends atmospheric OA to the adsorption zone 3 of the 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 a honeycomb (honeycomb) -shaped paper carrying a hygroscopic agent such as silica gel or zeolite, and is rotated by a motor (not shown) via a belt (not shown). It is driven.

The air exiting the adsorption zone 3 of the dehumidifying rotor 2 passes through one passage 5 of the orthogonal sensible heat exchange element 4.
Here, the orthogonal sensible heat exchange element 4 is the F-term theme 3L.
059 BA02.

The dry air, which has exited the adsorption zone 3 and whose temperature has risen, exchanges heat with the air passing through the other passage 6 of the orthogonal sensible heat exchange element 4 while passing through one passage 5 of the orthogonal sensible heat exchange element 4, thereby lowering the temperature. To do. This dried and cooled air is the product air S
A is supplied indoors.

The air RA from the room is passed through the other passage 6 of the orthogonal sensible heat exchange element 4. The spray 7 provided at the inlet of the other passage 6 sprays water into the other passage 6. As a result, while the return air RA passes through the inside of the other passage 6, the water inside the other passage 6 is vaporized and the temperature of the return air RA is lowered.

The return air RA passing through the other passage 6 becomes humid air and is discharged to the outside air by the blower 8. Reference numeral 9 is a chamber, in which a boiler exhaust gas and a micro gas turbine engine (hereinafter referred to as MGT in the specification and drawings)
High temperature exhaust is sent, such as exhaust of. The hot exhaust enters the desorption zone 10 of the dehumidifying rotor 2 from the chamber 9.
Here, the moisture adsorbed on the dehumidifying rotor 2 is desorbed, and is discharged to the atmosphere as exhaust gas EA by the blower 8.

[0012] Such a dehumidifying air conditioner has a simple structure and is easy to maintain, and since it can perform air conditioning by utilizing the residual heat of exhaust gas, it is characterized by a high energy saving effect and the like. Because of low humidity, healthy air conditioning can be performed.

[0013]

However, this dehumidifying air conditioner has not been considered for use in the intermediate period when neither cooling nor heating is required. Further, since the dehumidifying rotor 2 is not operated for a while because it is not used in the intermediate period, there is a problem that the odor component adsorbed to the dehumidifying rotor 2 is desorbed when the use is restarted, and odor is generated.

Further, in the dehumidifying air-conditioning system which uses the exhaust heat of the generator or the like, there is a problem that the utilization rate of the exhaust heat is lowered by stopping the operation in the intermediate period.

In view of the above problems, the present invention intends to provide a dehumidifying air conditioner which can be used even in an intermediate period when neither cooling nor heating is required.

[0016]

In order to solve the above problems, the present invention reduces the desorption air temperature of the dehumidifying rotor during the intermediate period so that the dry air passing through the dehumidifying rotor can be humidified.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention has a dehumidifying means for adsorbing moisture in the air and a sensible heat exchange element for exchanging sensible heat between two passages. As the temperature for desorbing the dehumidifying means, either high temperature or low temperature can be selected,
The dehumidifying means has a means for humidifying the dried air as needed, and the dehumidifying means lowers the temperature of the dried air by a sensible heat exchange element to supply it to the room. It has a function of desorbing the means at a low temperature, humidifying dry air as necessary, and supplying air of an appropriate temperature and humidity to the room.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the dehumidifying air conditioner of the present invention will be described in detail below with reference to the drawings. Here, for each constituent member of the blower 1, the dehumidifying rotor 2, the adsorption zone 3, the orthogonal sensible heat exchange element 4, the one passage 5, the other passage 6, the spray 7, the blower 8, the chamber 9, and the desorption zone 10. The dehumidifying air conditioner of the related art is the same as that shown in FIG. 3, and redundant description is omitted to avoid redundancy.
In the following description and drawings, the micro gas turbine generator is abbreviated as MGT.

In FIG. 1, MGT is a micro gas turbine generator as described above, and a micro gas turbine engine, a generator or an inverter for converting the generated electricity into alternating current of 60 Hz or 50 Hz and controlling the voltage in the casing. Etc. are stored. Also M
The GT discharges the exhaust gas of the micro gas turbine engine having a temperature of about 270 ° C. and the exhaust gas after cooling the inside of the casing. This low temperature exhaust is about 30 against the outside air.
The temperature is as high as ℃. Hereinafter, the exhaust gas of the micro gas turbine engine is referred to as high temperature exhaust, and the exhaust gas after cooling the inside of the casing is referred to as low temperature exhaust.

Each of D1 to D3 is an electric damper, which opens and closes the pipeline according to an electric signal. The damper D1 and the damper D2 are provided in each of the two high temperature exhaust pipe lines, and the damper D3 is provided in the low temperature exhaust pipe line.

V1 and V2 are electromagnetic valves,
The water pipe is opened and closed according to an electric signal. TRC
Is a temperature recording control means, which detects the output of the temperature sensor TS such as a thermocouple and outputs a control signal when the output of the temperature sensor TS reaches a predetermined value. The control signal output by the temperature recording control means TRC Is connected to the electromagnetic valve V1 and the damper D2.

HRC is a humidity recording control means, which detects the output of a humidity sensor HS such as a ceramic humidity sensor and outputs a control signal when the output of the humidity sensor HS reaches a predetermined value. The signal is connected to the electromagnetic valve V2 and the damper D1.

A temperature sensor TS and a humidity sensor HS
Is attached to one of the passages 5 side of the orthogonal sensible heat exchange element 4 and detects the temperature and humidity of the supply air SA to the room.

Reference numeral 11 is a humidifying spray, and an electromagnetic valve V2 is provided in a water supply pipe line to the humidifying spray 11. A second orthogonal sensible heat exchange element 12 exchanges heat between the outside air sent to the chamber 9 and the dry air exiting the adsorption zone 3.

The first embodiment of the present invention is configured as described above, and its operation will be described below. First, the summer mode will be described. The blower 1 and the blower 8 are energized to supply water to the spray 7. Further, the dehumidifying rotor 2 is rotated, and the dampers D1 and D3 are opened to send the high temperature exhaust gas and the low temperature exhaust gas of the MGT to the chamber 9. At this time, the damper D2 is closed.

The outside air OA is sent to the adsorption zone 3 of the dehumidifying rotor 2 by the blower 1, becomes dry air, and its temperature rises due to the heat of adsorption. The dry air whose temperature has risen passes through the second orthogonal sensible heat exchange element 12 and exchanges heat with the outside air to lower the temperature, and passes through one passage 5 of the orthogonal sensible heat exchange element 4.

The dry air exiting one of the passages 5 of the orthogonal sensible heat exchange element 4 exchanges heat with the air passing through the other passage 6 to lower the temperature. The dry air whose temperature has dropped is the supply air S
Supply as A in the room.

Return air RA, which is the air in the room, is sucked by the blower 8 and passes through the other passage 6. Since the return air RA generally has a relative humidity of about 60 to 70%, the water sprayed by the spray 7 is vaporized in the other passage 6.

By this vaporization, the heat of vaporization is removed, the temperature in the other passage 6 decreases, the temperature in the one passage 5 also decreases, and the temperature of the supply air SA decreases as described above. Further, in the other passage 6, water is vaporized and becomes humid air, which is discharged to the atmosphere by the blower 13.

In the above operation, it is preferable to spray a larger amount of water than the vaporized amount from the spray 7. That is, when the amount of water sprayed is less than the amount of vaporization, impurities contained in water are accumulated in the other passage 6. On the other hand, when water is sprayed in an amount larger than the amount of vaporization, even if impurities are contained in the water, they will flow down without being accumulated. If you are driving in summer conditions,
The cooling capacity is desired even a little, and the damper D1 and the damper D3 are opened and the damper D2 is closed to supply the exhaust gas of MGT to the chamber 9 entirely.

In the middle of spring and autumn, the operation is as follows. That is, the temperature of the supply air SA is measured by the temperature sensor TS and the humidity is measured by the humidity sensor HS. If the temperature of the supply air SA is lower than the set temperature, the measurement data of the temperature sensor TS is sent to the temperature recording control means TRC, and the temperature recording control means TRC sends a control signal to the damper D2 to open the damper D2. Then, the exhaust gas of the MGT is mixed in the return air RA from the room, and the temperature rises.
That is, since the temperature inside the other passage 6 rises, the temperature of the supply air SA also rises.

If the temperature rise is not sufficient by this operation, the temperature recording control means TRC sends a control signal to the valve V1 to stop spraying water from the spray 7. Then, the cooling function in the orthogonal sensible heat exchange element 4 disappears, and the temperature of the supply air SA further rises.

This operation is suitable, for example, when the temperature gradually decreases from the evening to the evening of fine weather around March to May.

On the contrary, when the temperature of the supply air SA is higher than the set temperature, the measurement data of the temperature sensor TS is sent to the temperature recording control means TRC to close the damper D2. At this time,
When the humidity of the supply air SA is low, the valve V2 is opened to humidify it.

That is, the supply air SA is humidified by the humidifying spray 11 while being dehumidified by the dehumidifying rotor 2, which seems to be a wasteful operation. However, since the dehumidifying rotor 2 carries silica gel or hydrophilic zeolite, it has a function of adsorbing odorous components such as ammonia in the outside air. The odorous components adsorbed on the dehumidifying rotor 2 are desorbed from the dehumidifying rotor 2 in the desorption zone 10 and released into the atmosphere. That is, even if the outside air contains an odorous component, the odorous component is not mixed into the supply air and is returned to the atmosphere.

When the humidity of the supply air SA is high, the humidity sensor HS detects this, and the humidity control means HRC outputs a control signal to close the valve V2 and stop the humidifying operation. If the humidity of the supply air SA is still high, the humidity control means HRC further outputs a control signal to open the damper D1 to send the exhaust gas of the MGT to the chamber 9 so that the dehumidifying function of the dehumidifying rotor 2 can be sufficiently exerted. Dehumidify. This operation is a little low temperature, in case of rain,
Suitable when the humidity gradually rises.

On the contrary, when the humidity of the supply air SA is low,
The humidity sensor HS detects this and the humidity control means H
The RC outputs a control signal to open the valve V2 to perform the humidifying operation.

In winter, the damper D1 is closed and the damper D2 is opened so that only low temperature exhaust gas is put into the chamber 9. That is, the desorption action of the moisture adsorbed on the dehumidifying rotor 2 is reduced,
The dehumidifying action of the dehumidifying rotor 2 is reduced.

Further, the damper D2 is opened to mix the high temperature exhaust gas of the MGT with the return air RA from the room. As a result, the temperature of the air flowing through the other passage 6 of the orthogonal sensible heat exchange element 4 rises, the air passing through the one passage 5 is heated, and the temperature of the supply air SA rises.

Here, the humidity of the supply air is measured by the humidity sensor HS.
When the humidity measured by the above is less than a predetermined value, the valve V2 is opened and water is sprayed from the humidifying spray 11 to supply air S.
A is humidified. The humidifying spray 11 is provided on the inlet side of the passage 5 of the orthogonal sensible heat exchange element 4, and the water droplets sprayed by the humidifying spray 11 also enter the passage 5. Since the water droplets that have entered one of the passages 5 are vaporized while passing through the one passage 5, the water droplets are not discharged into the room without being vaporized.

The second embodiment of the present invention will be described in detail below with reference to FIG. Here, the blower 1, the dehumidifying rotor 2, the adsorption zone 3, the orthogonal sensible heat exchange element 4, the one passage 5, the other passage 6, the spray 7, the blower 8, the chamber 9, the desorption zone 10, the humidifying spray 11, The constituent members of the two orthogonal sensible heat exchange elements 12 and the blower 13 are the same as those shown in FIG. 1 showing the first embodiment of the dehumidifying air-conditioning apparatus, and duplicate explanations are omitted to avoid redundancy. .

In the second embodiment, as compared with the first embodiment, the temperature sensor TS and the humidity sensor HS are provided in the return air RA conduit from the room. The other structure is the same as that of the first embodiment.

In the second embodiment, the temperature of the return air RA from the room is detected by the temperature sensor TS and the humidity is detected by the humidity sensor HS. Therefore, in this case, the indoor air condition is the supply air SA, as in the case where there are many people in the room.
It is suitable when it is determined by the heat source or humidification source in the room from the condition of.

That is, for example, when the indoor humidification source raises the indoor humidity even when the humidity of the supply air is sufficiently low, the return air RA from the room is measured to limit the operation of the humidifying spray 11. To do. Alternatively, even if the temperature of the supply air SA is low, when the indoor temperature rises due to the indoor heating source, the open degree of the damper D2 is controlled by the temperature of the return air RA.

[0045]

As described above, the dehumidifying air conditioner of the present invention can select high temperature or low temperature as the air for desorbing the moisture adsorbed by the dehumidifying means. In addition, the dehumidifying means can be operated weakly, and the dehumidifying means can be operated for the purpose of deodorization. In this case, it can be humidified if necessary.

The humidification spray can be operated by the output signal of the humidity sensor to supply the air of appropriate humidity. Further, the supply path of the exhaust gas having waste heat can be switched by the output of the temperature sensor to supply the air of the proper temperature.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of a dehumidifying air conditioner of the present invention.

FIG. 2 is an explanatory diagram showing a second embodiment of the dehumidifying air conditioner of the present invention.

FIG. 3 is a sectional view showing a conventional dehumidifying air conditioner.

[Explanation of symbols]

1,8,11,13 blower 2 dehumidification rotor 3 adsorption zone 4 Orthogonal sensible heat exchange element 5 one passage 6 The other passage 7 spray 9 chambers 10 Desorption zone 11 Humidifying spray 12 Second orthogonal sensible heat exchange element

Claims (5)

[Claims] 1. A dehumidifying means for adsorbing moisture in air, and a sensible heat exchange element for exchanging sensible heat between two passages, wherein the temperature of the air for desorbing the moisture adsorbed in the dehumidifying means is controlled. Either high temperature or low temperature can be selected, and means for humidifying the dry air by the dehumidifying means is provided as necessary, and the temperature of the air dried by the dehumidifying means is lowered by the sensible heat exchange element and supplied to the room. Dehumidifying air conditioner designed to do. 2. The dehumidifying air-conditioning system according to claim 1, wherein the dehumidifying means comprises a moisture adsorption rotor. 3. The dehumidifying air conditioner according to claim 2, wherein the moisture adsorption rotor is made of silica gel. 4. The dehumidifying air conditioner according to claim 1, wherein the sensible heat exchange element is configured to cool air by returning air from the room. 5. The dehumidifying air conditioner according to claim 1, further comprising means for humidifying the air dried by the dehumidifying means.