JP2003120956A - Dehumidifying air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dehumidifying air conditioner in which even a low temperature waste heat is used as a driving heat source. SOLUTION: A dehumidifying rotor 2 and a sensible heat exchange rotor 4 are rotated in the opposite directions, and the temperature distribution of a heater 8 is such that it is lower right after the dehumidifying rotor 2 enters an attach and detach zone 9, and higher immediately before the dehumidifying rotor 2 enters the attach and detach zone 9. Thus, in a high humidity part of the dehumidifying rotor 2, the rotor is attached and detached at a low temperature, and in a low humidity part, and it is attached and detached at a high temperature. Even if the average temperature of the attach and detach zone 9 is low, effective attach and detach operations are performed.

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, and more particularly to a dehumidifying air conditioner which can utilize thermal energy of a temperature not higher than 100.degree.

[0002]

2. Description of the Related Art A dehumidifying air conditioner is suitable for a humid summer season in Japan because it lowers the humidity of supply air as compared with an air conditioner which lowers the temperature by a refrigerator. In other words, because the humidity of the air supplied to the room is appropriate,
It is a healthy air-conditioning system in which sweat easily evaporates and the human's original body temperature control function is exerted.

Further, since the driving energy source of the dehumidifying air conditioner is heat, the heat of combustion of kerosene or gas can be used as a heat source, so that the electric power peak in summer can be reduced. Further, various waste heats can be used as a heat source, which contributes to energy saving.

A conventional dehumidifying air conditioner will be described with reference to FIG. Reference numeral 1 is a blower, which 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 the 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 dry air which has left the adsorption zone 3 and whose temperature has risen exchanges heat with the rotary sensible heat exchange element 4 in the heat absorption zone 5, so that the temperature of the dry air is lowered and the rotary sensible heat exchange element 4 is heated. The temperature drops. This dried and cooled air is supplied to the room as product air SA.

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

The temperature of the humid air whose temperature has risen further rises 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 is discharged to the atmosphere by the fan 10 as exhaust gas EA. Here, the heater 8 is a heat exchanger to which steam is sent, a gas heater, or the like.

[0009]

As described above, the dehumidifying air-conditioning system is one in which the temperature is first lowered after the humidity is adjusted as described above. Since heat is used as the driving energy source, various types of heat sources are used. Is available. However, it is desirable to use air having a temperature of 100 ° C. or higher for desorption of the dehumidifying rotor 2. Therefore, a heater that generates a sufficiently high temperature is required, and when waste heat is used, the waste heat source is limited. There is a problem that

In the case of cooling the engine with cooling water, such as a diesel generator, the temperature of the cooling water leaving the engine is 80 ° C to 90 ° C, and such waste heat cannot be used. It was difficult. An object of the present invention is to provide a dehumidifying air conditioner capable of desorbing a dehumidifying rotor with a sufficiently high efficiency even when the desorption temperature is low, and thus utilizing waste heat discharged from various waste heat sources.

[0011]

In order to solve the above problems, the present invention makes the dehumidifying rotor and the sensible heat exchange rotor rotate in mutually opposite directions, and further, the temperature distribution of the heater is desorbed by the dehumidifying rotor. It was designed to be low immediately after entering the zone and high just before the dehumidifying rotor exits the desorption zone.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention has a dehumidifying rotor carrying a moisture adsorbent, and a sensible heat exchange rotor having a sheet-shaped heat medium formed in a honeycomb shape. The sensible heat exchange rotor and the sensible heat exchange rotor are rotated in opposite directions, the dehumidification rotor is divided into an adsorption zone and a desorption zone, the sensible heat exchange rotor is divided into an endothermic zone and a heat dissipation zone, and the adsorption zone of the dehumidification rotor is divided into The dry air that has passed through passes through the heat absorption zone of the sensible heat exchange rotor and is supplied to the room, and the return air from the room passes through the heat dissipation zone of the sensible heat exchange rotor and then passes through the heater to the desorption zone of the dehumidification rotor. In addition, the temperature distribution of the heater is low in the part immediately after the dehumidifying rotor enters the desorption zone and in the part immediately before the dehumidifying rotor leaves the desorption zone. Are those that were in Kunar so,
In the sensible heat exchange rotor, the highest temperature part in the heat dissipation zone coincides with the highest temperature part of the heater, and the temperature near the outlet of the desorption zone becomes highest.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the dehumidifying air conditioner of the present invention will be described in detail below with reference to FIG. Here, the same components as those of the conventional dehumidifying air-conditioning apparatus of FIG.

That is, the dehumidifying rotor 2, the adsorption zone 3, the rotary sensible heat exchange element 4, the heat absorbing zone 5, the heat radiating zone 7, the heater 8 and the desorption zone 9 are the respective constituent elements of the conventional dehumidifying air conditioner shown in FIG. Are the same.

Although a blower is not shown in FIG. 1, it is provided with a blower for sending the outside air into the room and a blower for discharging the air in the room to the atmosphere, as in the conventional dehumidifying air conditioner shown in FIG.

The dehumidifying rotor 2 and the rotary sensible heat exchange element 4 are rotationally driven in opposite directions by a geared motor or the like. The temperature of the air discharged from the adsorption zone 3 is raised by the heat of adsorption, and the rotary sensible heat exchange element 4 is warmed in the heat absorption zone 5.

Immediately after entering the heat dissipation zone 7, the rotary sensible heat exchange element 4 has the highest temperature, and the hot air passing therethrough passes through the heater 8 and goes straight toward the end of the desorption zone 9. On the contrary, the rotary sensible heat exchange element 4 has the lowest temperature immediately before it exits the heat radiation zone 7, and the hot air passing therethrough passes through the heater 8 and heads straight toward the start end of the desorption zone 9. Therefore, the temperature near the end of the desorption zone 9 becomes the highest and the temperature near the start end becomes the lowest.

The heater 8 has a structure in which hot water is caused to flow through the pipe 11 and heat is exchanged between the hot water and the air passing therethrough. Further, the inflow side of the pipe 11 faces the vicinity of the end of the desorption zone 9 and the outflow side of the pipe 11 faces the vicinity of the start of the desorption zone 9.

As a result, the temperature of the portion of the heater 8 facing the end of the desorption zone 9 is highest, and the temperature of the portion of the heater 8 facing the start end of the desorption zone 9 is the lowest.
Therefore, the air passing through the heater 8 has a high temperature near the end of the desorption zone 9 and a low temperature near the start end of the desorption zone 9.

Since the temperature of the air exiting the rotary sensible heat exchange element 4 is highest near the end of the desorption zone 9,
In combination with the heating by the heater 8, the temperature becomes sufficiently high near the end of the desorption zone 9.

Therefore, even if the temperature of the hot water flowing through the heater 8 is as low as about 90 ° C., the temperature of the air near the end of the desorption zone 9 rises to near 90 ° C., and desorption is effectively performed. That is, the dehumidifying rotor 2 contains a large amount of water near the start end of the desorption zone 9, and desorption proceeds even if the temperature of the desorption air is low. Because there are few
It is necessary to raise the temperature of desorption air.

As described above, according to the present invention, the temperature distribution is positively created in the desorption zone 9 so that the desorption zone 9 can be manufactured.
Even if the average temperature inside is low, the dehumidifying rotor 2 can be effectively attached and detached.

In the above embodiments, hot water is used as the heat medium flowing through the heater 8. However, a fluid other than water such as oil may be used, and if the diameter of the pipe 11 is increased, hot air or hot air can be used as the heat medium. Alternatively, a high temperature gas such as exhaust gas can be used.

In the above embodiments, as a means for making the temperature distribution of the heater low at the start end of the desorption zone and high at the end thereof, the inflow side to the pipe 11 is made the end side of the desorption zone and the outflow side is made desorption. Although the example of setting the zone start side is shown, the temperature distribution can be created by the density of the pipe 11. That is, the pipes 11 are densely arranged in the portions where the temperature is desired to be raised, and the pipes 11 are sparsely arranged in the portions where the temperature may be low.

[0025]

Since the dehumidifying air-conditioning system of the present invention is constructed as described above, the dehumidifying rotor can be effectively attached and detached even if the desorption temperature is low, and waste heat having a low temperature can be used. Is something that can be done.

For this reason, waste heat which has not been used conventionally can be used as a heat source, so that the energy utilization efficiency of the waste heat generating source can be improved, and the heat discharged from the waste heat generating source to the environment can be improved. Since the energy can be reduced, it can contribute to the prevention of the so-called heat island phenomenon in which the temperature of the city rises.

Further, in the dehumidifying air conditioner of the present invention, the temperature distribution in the desorption zone can be made ideal by simply reversing the rotation directions of the rotary sensible heat exchange element and the dehumidification rotor. It can be realized without any special additional cost, since it does not require a significant component for adjusting

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing a conventional dehumidifying air conditioner.

[Explanation of symbols]

2 dehumidification rotor 3 adsorption zone 4 Rotary sensible heat exchange element 5 Endothermic zone 7 heat dissipation zone 8 heater 9 Desorption zone 11 pipes

Claims (3)

[Claims] 1. A dehumidifying rotor carrying a moisture adsorbent, and a sensible heat exchange rotor in which a sheet-shaped heat medium is formed in a honeycomb shape. The dehumidifying rotor and the sensible heat exchange rotor are rotated in mutually opposite directions. In this way, the dehumidifying rotor is divided into an adsorption zone and a desorption zone, the sensible heat exchange rotor is divided into an endothermic zone and a heat radiating zone, and the dry air passing through the adsorption zone of the dehumidifying rotor is divided into the sensible heat exchange rotor. And supply to the room through the heat absorption zone of the room, and after passing the return air from the room through the heat dissipation zone of the sensible heat exchange rotor through the heater to the desorption zone of the dehumidifying rotor, The temperature distribution of the heater is low at the portion immediately after the dehumidifying rotor enters the desorption zone and at the portion immediately before the dehumidifying rotor exits the desorption zone. Kunar so dehumidifying air-conditioning apparatus to. 2. The heater is a pipe through which a heat carrier fluid is passed, wherein the inflow side of the pipe faces the outlet of the desorption zone and the outflow side of the pipe faces the inlet of the desorption zone. The dehumidifying air conditioner described. 3. The dehumidifying air-conditioning system according to claim 2, wherein the pipes are arranged sparsely and densely to create a temperature distribution.