JP2003024737A - Dehumidication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dehumidication system capable of performing the precise control of humidity so that the humidity at an outlet on a treated air side is received in a constant range with respect to humidity set at the time of operation of a humidifier, also achieving the conservation of energy at the time of regeneration of the humidifying function of a dehumidication rotor and capable of being constituted at a low cost by dispensing with a dew point thermometer. SOLUTION: A dehumidifying air conditioning system is equipped with the dehumidication rotor alternately passed through a treated air side and regeneration air side while rotated to adsorb moisture contained in treated air flowing through the treated air side on the treated air side while desorbing moisture by the heat energy of regeneration air flowing through the regeneration air side on the regeneration air side, a cooling means for properly cooling treated air passed through the dehumidification rotor and a heating means for applying proper heat energy to regeneration air. This system is further equipped with a temperature detection means arranged to the outlet of the regeneration air side and detecting the temperature of regeneration air passed through the outlet of the regeneration air side and a control means for controlling the capacity of the heating means on the basis of the detection value from the temperature detection means so that the temperature of the outlet of the regeneration air side becomes almost constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to humidity control of a dehumidifying system that dehumidifies by a dehumidifying rotor.

[0002]

A conventional dehumidifying device 1 for dehumidifying by a dehumidifying rotor (also referred to as a honeycomb rotor or a desiccant rotor) has a dehumidifying rotor 2 which continues to rotate at a constant speed as shown in FIG. The treatment air side 3 and the regeneration air side 4 are arranged so as to pass alternately, and when the humid treatment air passes through the treatment air side rotor, the moisture in the treatment air is absorbed in the rotor, whereby the treatment is performed. The air is dehumidified. The absorbed dehumidifying rotor 2 enters the regeneration air side 4 while continuing to rotate, and dehumidifies by desorption of moisture due to heat energy of the regeneration air heated by the heat source 6 whose operation is controlled by the heat source control unit 5. The ability is regenerated. Reference numeral 7 in the figure indicates a temperature sensor for detecting the inlet temperature of the regenerated air side rotor.

Since the humidity control in the dehumidifying device 1 is generally performed based on the inlet temperature of the rotor on the regenerated air side, an ON signal from the humidity sensor 8 for dehumidifying the room is a heat source. When input to the control unit 5, the heat source control unit 5 rapidly operates the heat source 6 so that the inlet temperature of the regeneration air side rotor maintains a predetermined temperature (for example, about 100 ° C.), so that the dehumidification rotor 2 can be operated. It controlled the dehumidification function.

Therefore, even if the treated air has a low humidity, the heat source control unit 5 can output the ON signal from the humidity sensor 7 as in the case of dehumidifying the humid treated air, as in the case of dehumidifying the humidified treated air. In order to rapidly operate the heat source 6 so as to maintain the temperature at a predetermined temperature, the low-humidity treated air is dehumidified more than necessary, and wasteful fuel is input to the heat source 6 to cause an operating cost. there were. Furthermore, since the heat source 6 is rapidly operated and suddenly stopped by the heat source control unit 5 based on the ON-OFF signal from the humidity sensor 8, it is difficult to keep the humidity of the treated air side outlet constant, and the dehumidifier There is also a problem that the deviation of the humidity supplied to the room becomes large with respect to the set humidity set during operation.

In order to solve such a problem, FIG.
As shown in FIG. 3, a dew point thermometer 9 for detecting the humidity of the outlet of the dehumidifying device 1 on the treated air side is provided, and a control signal from the dew point thermometer 9 is input to the heat source control unit 5 to determine the capacity of the heat source 6. Humidity control has been proposed which is determined as necessary. By the way, according to such humidity control,
Not only can precise humidity control be performed so that the humidity at the processing air side outlet falls within a certain range with respect to the set humidity set during the operation of the dehumidifier, but the heat source 6 can also supply necessary energy.
Although it is possible to conserve energy because it only needs to be put in, the humidity control system becomes high in cost because the expensive dew point thermometer 9 has to be used, and the cost of the dehumidification system itself is increased. I will end up.

Therefore, the present invention has been made to solve the problems of the conventional dehumidifying system as described above, and treats the treated air against the set humidity set during the operation of the dehumidifier. Not only can precise humidity control be performed to keep the humidity at the side outlet within a certain range, but also energy saving when regenerating the dehumidifying function of the dehumidifying rotor, and a low-cost system configuration that does not require a dew point thermometer The purpose is to provide a dehumidification system capable of performing.

[0007]

In order to achieve the above-mentioned object, according to the present invention, while continuing rotation, the treated air side and the regenerated air side are alternately passed, and the treated air side flows through the treated air side. Dehumidifying rotor arranged to adsorb the moisture contained in the treated air and to be desorbed by the thermal energy of the regeneration air flowing through the regeneration air side on the regeneration air side, and to the regeneration air. Dehumidifying air-conditioning system including heating means for applying various heat energy, temperature detecting means arranged at the regeneration air side outlet for detecting the temperature of regeneration air passing through the regeneration air side outlet, and the temperature detecting means. Control means for controlling the capacity of the heating means so that the temperature of the regeneration air side outlet becomes substantially constant on the basis of the detected value.

Further, the present invention is characterized in that the control means controls the operation of the heating means.

Further, according to the present invention, after the control means operates the heating means at a predetermined output, the temperature of the regeneration air side outlet falls within a predetermined range based on the detected value from the temperature detecting means. When it falls, the output state of the heating means is maintained, and when the temperature of the regeneration air side outlet does not fall within a predetermined range, the output of the heating means is adjusted so that the temperature of the regeneration air side outlet becomes substantially constant. The feature is that the capacity is controlled to a low level.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The most preferred embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a configuration diagram for explaining an example in an embodiment of the present invention.

First, the basic structure of this dehumidifying system will be described with reference to FIG. In the casing of the dehumidifying device 10, a treated air side 11 and a regenerated air side 12 are formed so as to be impermeable to each other, and the dehumidifying device alternately passes through the treated air side 11 and the regenerated air side 12 while continuing to rotate. A rotor 13 is provided.

The dehumidifying rotor 13 is rotationally driven and controlled by a control means (not shown).
It is filled with silica gel or zeolite-based solid moisture absorbent. Therefore, when the humid process air is passed through the process air side inlet 11a to the process air side rotor, the process air moves due to the moisture in the process air moving into the rotor in order to maintain the equilibrium state with the moisture inside the rotor. Dehumidified.

The processing air side outlet 11b is provided with a cooler 14 for appropriately cooling the processing air whose temperature has risen due to moisture being absorbed by the processing air side rotor.
After being cooled by 4, the process air is supplied to a predetermined space, for example, a room. In the room, the control signal (ON-OFF signal) is controlled by the heat source by detecting whether the humidity (relative humidity) of the treated air supplied to the room is higher than the set humidity set when the dehumidifier is operating. A humidity sensor 16 that outputs to the unit 15 is provided.

On the other hand, the heat source control unit 1 based on the control signal from the humidity sensor 16 is provided at the regeneration air side inlet 12a.
A heat source 17 whose operation is controlled by 5 is provided so as to appropriately heat the regeneration air sent to the regeneration air side 12. Therefore, the moisture content of the dehumidifying rotor 13 that has moved to the regenerated air side 12 while continuing to rotate is the heat source 17
The dehumidifying capacity of the dehumidifying rotor 13 is regenerated by being desorbed by the heat energy of the regenerated air that has been appropriately heated. Then, the moisture desorbed from the dehumidifying rotor 13 is discharged from the regeneration air side outlet 12b together with the regeneration air to the outside air. Regeneration air side outlet 12 through which regeneration air is discharged
A temperature sensor 18 is provided at b to detect the temperature of the regenerated air immediately before being discharged to the outside air after passing through the regenerated air side rotor and outputting the temperature to the heat source control unit 15.

The heat source control unit 15 controls the humidity of the dehumidifying device 10 by utilizing the characteristics of the dehumidifying rotor 13, which will be described later. The heat source controlling unit 15 controls the operation of the heat source 17 by the control signal from the humidity sensor 16 and also controls the temperature. The capacity of the heat source 17 is controlled based on the output signal from the sensor 18.

Here, the characteristics of the dehumidifying rotor 13 will be described. When the treated air flowing into the treated air side 11 has a high humidity, the treated air side rotor causes the moisture content in the treated air until the required dry air is obtained. Absorb moisture. Therefore, when the treated air side rotor that has absorbed the moisture content of the treated air enters the regeneration air side 12 while continuing to rotate, the moisture content in the rotor is increased due to the heat energy of the regeneration air heated appropriately by the heat source 17. When desorbing, heat of vaporization corresponding to moisture is generated. Due to the generation of the heat of vaporization, the temperature of the regeneration air after passing through the regeneration air side rotor hardly rises above the temperature of the regeneration air before passing through the regeneration air side rotor. In contrast,
When the treated air flowing into the treated air side 11 has a low humidity, there is almost no moisture absorbed by the treated air side rotor. Therefore, even if such a dehumidified rotor 13 is heated by the regenerated air on the regenerated air side 12, the heat of vaporization is reduced. Is hardly generated, and heat energy is stored in the dehumidifying rotor 13. Therefore, the temperature of the regeneration air after passing through the regeneration air side rotor will be higher than the temperature of the regeneration air before passing through the regeneration air side rotor.

By utilizing such characteristics of the dehumidifying rotor 13, the heat source control unit 15 receives a control signal (ON signal) from the humidity sensor 16 to dehumidify the process air supplied to the room. Then, first, heat source 1
7 is controlled so that it burns at a predetermined output, for example, at full power. After that, the heat source control unit 15 detects the temperature sensor 1
Based on the detected value from 8, it is determined whether the outlet temperature on the regeneration air side, that is, the temperature of the regeneration air that has passed through the rotor on the regeneration air side, is kept substantially constant or rises.

Here, if the temperature of the outlet on the side of the regeneration air falls within a predetermined range and maintains a substantially constant state, the heat of vaporization is generated from the rotor on the side of the regeneration air. It is determined that the treated air flowing into the treated air side 11 is humid, and the heat source 17 is continuously operated at full power. As a result, the dehumidifying rotor 13 is regenerated so as to have the maximum dehumidifying capacity, and the dehumidifying rotor 13
Humidity of the treated air is controlled by absorbing the moisture content of the treated air so that the required dried treated air can be obtained.

On the other hand, if the outlet temperature on the regeneration air side rises without falling within the predetermined range, the heat of vaporization is not generated from the rotor on the regeneration air side. It is determined that the treated air that has flowed into the chamber has a low humidity, and the heat source 17 is set to, for example, 50 to 50 during full-power operation so that the outlet temperature on the regeneration air side is maintained at a substantially constant state.
The amount of heat given to the regenerated air is reduced and adjusted by controlling the capacity to about 70%. As a result, the dehumidifying rotor 13 is variably controlled so that its dehumidifying ability is lowered, and thus humidity control is performed so as not to dehumidify the low-humidity treated air more than necessary.

As described above, according to the dehumidification system of the present invention, the heat source control unit 15 for controlling the operation of the heat source 17 for heating the regenerated air based on the control signal from the humidity sensor 16 has the regenerated air side outlet. The capacity of the heat source 17 is controlled based on the output value from the temperature sensor 18 arranged in 12b. That is, the heat source control unit 15 includes the humidity sensor 1
When the ON signal is input from 6, the heat source 17 controls the operation so that it burns at full power, and based on the detected value from the temperature sensor 18, the outlet temperature on the regenerated air side is maintained at a substantially constant state, or Determine if it will rise. If the outlet temperature on the regenerated air side remains almost constant, the heat source 17 is continuously operated to regenerate the dehumidifying rotor 13 so as to obtain the maximum dehumidifying capacity, so that the request from the humidified process air is increased. It becomes possible to easily obtain the dry treatment air to be used. If the temperature of the outlet on the side of the regenerated air rises, the capacity of the heat source 17 is controlled so that the temperature of the outlet on the side of the regenerated air is kept substantially constant to reduce the amount of heat given to the regenerated air. By variably controlling so as to be optimum, it becomes possible to easily perform humidity control that does not dehumidify the low-humidity treated air more than necessary.

As a result, the dehumidifying device 10 can perform precise humidity control so that the humidity of the processing air flowing out into the room from the processing air side outlet 11b can almost always match the set humidity and can be continuously maintained. become able to.
Moreover, since the dehumidifying device 10 can obtain the precise humidity control almost equivalent to the dehumidifying device when the expensive dew-point thermometer is used, without using the dew-point thermometer, the dehumidifying system is configured at low cost. In addition, the optimum amount of fuel is supplied to the heat source 17 according to the increase or decrease of the load, so that as shown in FIG. Can be further reduced.

[0022]

As described above, according to the dehumidifying system of the present invention, the precision humidity control is such that the humidity at the outlet of the treated air is within a certain range with respect to the set humidity set during the operation of the dehumidifier. It is possible to provide a dehumidification system that not only can perform the above-described operation but also saves energy when the dehumidification function of the dehumidification rotor is regenerated and that does not require a dew point thermometer and can be configured at low cost.

[Brief description of drawings]

FIG. 1 is a configuration diagram for explaining an example in an embodiment of the present invention.

FIG. 2 is an experimental result comparing the fuel consumptions of the dehumidifying device and the conventional dehumidifying device in the same example.

FIG. 3 is an explanatory diagram for explaining an example of a conventional dehumidification system.

FIG. 4 is an explanatory diagram for explaining an example of a conventional dehumidification system using a dew point thermometer.

[Explanation of symbols]

10 Dehumidifying air conditioner 11 Processed air side 11a Treatment air side inlet 11b Treated air side outlet 12 Playback air side 12a Regeneration air side inlet 12b Regenerative air side outlet 13 Dehumidifying rotor 15 Heat source control unit 16 Humidity sensor 17 heat source 18 Temperature sensor

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Taichi Sumiyoshi             1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas             Within the corporation F-term (reference) 4D052 CB00 DA01 DB01 GA01 GA03                       GB02 GB03 HA01 HA03

Claims (3)

[Claims] 1. While continuing to rotate, it alternately passes through the treated air side and the regenerated air side, the treated air side adsorbs moisture contained in the treated air flowing through the treated air side, and the regenerated air side. Then, in a dehumidification system comprising a dehumidifying rotor arranged so that moisture is desorbed by the heat energy of the regeneration air flowing through the regeneration air side, and a heating means for giving appropriate heat energy to the regeneration air, The temperature of the regeneration air side outlet is substantially equal to that of the regeneration air side outlet, and the temperature of the regeneration air side outlet passes through the regeneration air side outlet and detects the temperature of the regeneration air. A dehumidifying system comprising: a control unit that controls the capacity of the heating unit so that the heating unit is kept constant. 2. The dehumidification system according to claim 1, wherein the control unit controls the operation of the heating unit. 3. The control means, after operating the heating means at a predetermined output, when the temperature of the regeneration air side outlet falls within a predetermined range based on the detection value from the temperature detection means, When the output state of the heating means is maintained and the temperature of the regeneration air side outlet does not fall within a predetermined range, the output of the heating means is controlled to be low so that the temperature of the regeneration air side outlet becomes substantially constant. The dehumidification system according to claim 2, wherein