JP2010247040A - Dehumidifier and method of controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily achieve more highly stable variable control operation in a method of controlling the operation of a dehumidifier. <P>SOLUTION: In the dehumidifier 1 of a type to dehumidify dehumidification object air while reproducing the dehumidification capacity of a dehumidifying rotor 11 by repeating dehumidification, reproduction and purge, a reproduction air flow is controlled to such a suitable reproduction air flow that an exit temperature at a position near the reproduction zone 11b of a purge zone 11c becomes high compared to an exit temperature at a position near the purge zone 11c of a reproduction zone 11b and becomes a prescribed reproduction completion temperature or higher, the estimated humidity of the dehumidification object air is acquired on the basis of the prepared correspondence relation of the suitable reproduction air flow and the humidity of the dehumidification object air, a suitable operation condition is acquired on the basis of the prepared relation of the suitable operation condition and the humidity of the dehumidification object air, and the dehumidifier 1 is controlled according to the acquired suitable operation condition. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to operation control of a dehumidifier.

  Conventionally, as a technique for controlling the rotor rotation speed or regeneration temperature of an adsorption rotor type dehumidifier according to fluctuations in the dehumidification load, etc., the dew point temperature of the supply air is detected and the dew point temperature satisfies the required conditions. There is a technology for adjusting the rotor speed and regeneration temperature (see Patent Document 1), and the humidity of the supply air is detected by a hygrometer, and the rotor speed is varied so that the humidity matches the set humidity. There is a technology to control (see Patent Document 2).

  In addition, there is a technology that slows the rotational speed of the rotor when the humidity of the air before dehumidification is low, and increases the rotational speed of the rotor when the humidity of the dehumidification zone inlet air is high (see Patent Document 3). There is a technique for determining whether or not regeneration is almost complete from the detection value of a temperature sensor provided near the end of the regeneration zone, and adjusting the regeneration air volume (see Patent Document 4).

JP-A-6-63344 Japanese Patent Laid-Open No. 2003-21378 Japanese Patent Laid-Open No. 5-200231 JP 2002-331221 A

  Conventionally, as an energy saving operation method for an adsorption rotor type dry dehumidifier used in a low dew point environment such as a lithium ion battery manufacturing environment, the humidity of the dehumidification zone inlet air and outlet air is measured by a hygrometer (including a dew point meter). There is an operation method in which the operation is controlled in accordance with the change in the measured value. However, the hygrometer is susceptible to a decrease in measurement accuracy due to the influence of dirt on the detection unit. Specifically, for example, a capacitance type or electric resistance type hygrometer (dew point meter) is susceptible to measurement values due to adhesion of solvent vapor or dirt, etc., and the measurement error increases over time. is there. Similarly, in the mirror-cooled dew point meter, dirt on the mirror surface due to contaminants (gas and dust) in the air adversely affects the measured value.

  And if the measurement error of a hygrometer (dew point meter) increases, improper operation control will be performed based on the erroneous measurement value, and dehumidification performance may be remarkably impaired. For this reason, when controlling a dehumidifying device using a hygrometer or dew point meter, in order to prevent the stability of the dehumidifying performance from being impaired, periodic maintenance of the dew point meter or hygrometer (for example, a mirror surface) Cleaning etc.) and calibration are necessary, and maintenance is complicated.

  In view of the above problems, the present invention is a method for controlling the operation of the dehumidifier, and an object thereof is to easily realize a variable control operation with higher stability.

The present invention is based on the amount of regeneration air that is controlled so that the outlet temperature at the position near the regeneration zone in the purge zone is higher than the outlet temperature at the location near the purge zone in the regeneration zone and is equal to or higher than the regeneration completion temperature. In addition, by estimating the humidity of the air to be dehumidified and determining the operating conditions of the dehumidifying device based on the estimated humidity, it is possible to easily realize variable control operation with higher stability.

  More specifically, the present invention relates to a dehumidifying device having a dehumidifying unit for dehumidifying passing air, wherein the dehumidifying unit is dehumidified by passing air to be dehumidified, and the dew point is within a predetermined range. A dehumidifying area for regenerating the dehumidifying capacity of the dehumidifying unit by passing temperature-controlled air, and a purging area for radiating heat of the dehumidifying unit by the passing air; Section changing means, and the dehumidifying unit is repeatedly assigned to the dehumidifying area, the regeneration area, and the purge area in order, and the outlet changing temperature at the position near the regeneration area of the purge area. Is introduced into the regeneration zone such that the temperature is higher than the outlet temperature at the position near the purge zone of the regeneration zone and is equal to or higher than a predetermined regeneration completion temperature. Based on the correspondence relationship between the regeneration air volume control means for controlling the raw air volume, the suitable regeneration air volume that is prepared in advance as the control target by the regeneration air volume control means, and the humidity of the air to be dehumidified. Estimated humidity acquisition means for acquiring the estimated humidity of the air to be dehumidified corresponding to the regeneration air volume, and regeneration of the dehumidifying unit prepared in advance with the dew point of the dehumidified air prepared in advance within the predetermined range Corresponds to the estimated humidity acquired by the estimated humidity acquisition means based on the preferable operating condition information indicating the relationship between the preferable operating condition that is the operating condition that minimizes the amount of heat and the humidity of the air to be dehumidified. A dehumidifying device comprising: a preferable operating condition acquiring unit configured to acquire the preferable operating condition, and controlled according to the preferable operating condition.

  The present invention is applied to a type of dehumidifying device that dehumidifies the air to be dehumidified while regenerating the dehumidifying capability of the dehumidifying unit by repeating dehumidifying, regenerating and purging in the dehumidifying unit. Note that the dehumidification units are assigned by the area changing means so that three areas of the dehumidification area, the regeneration area, and the purge area are formed in the dehumidification unit, and these areas are transferred continuously or intermittently. Here, the regeneration air volume is the air volume of air used for regeneration of the dehumidifying capacity of the dehumidifying unit by being introduced into the regeneration zone. Conventionally, the regeneration of the dehumidifying capacity is completely completed in the regeneration area, and only the dehumidifying unit is cooled in the purge area. However, even if the regeneration is not completely completed in the regeneration area, the present invention is able to perform the dehumidification in the purge area. Focusing on the fact that the purge air is heated by the heat storage of the unit and the dehumidification capacity is regenerated, the outlet temperature near the regeneration zone in the purge zone is higher than the outlet temperature at the location near the purge zone in the regeneration zone. In addition, the regeneration air volume is controlled so as to be equal to or higher than the regeneration completion temperature, whereby the regeneration is completed in the purge zone. By completing the regeneration using heat storage without completely regenerating the dehumidifying capacity in the regeneration area, according to the present invention, the amount of heat required for the regeneration is reduced, and the efficiency of the apparatus is reduced. It becomes possible to improve.

  Here, the inventors of the present application have found that there is a correlation between the preferable amount of regeneration air controlled as described above and the humidity of the air to be dehumidified. In the present invention, the relationship between the preferred regeneration air volume controlled as described above and the humidity of the air to be dehumidified is examined in advance through experiments and simulations, and the dehumidification is performed based on the preferred regeneration air volume obtained as described above. The humidity of the target air is estimated.

  The estimated humidity can be used as a material for determining the operating conditions of the dehumidifier. For example, based on the estimated humidity, it is possible to determine the speed of changing the dehumidifying unit assignment by the zone changing means and the target value for adjusting the temperature of the air used for regeneration. That is, in the past, control was performed according to the humidity and dew point obtained by a hygrometer (dew point meter). However, in the present invention, erroneous measurement and maintenance by the hygrometer (dew point meter) are performed by performing control according to the estimated humidity. A highly stable variable control operation can be easily realized without causing such problems.

The operating conditions used for controlling the dehumidifying device are, for example, the rotor rotation speed in the dehumidifying rotor type dehumidifying device and the regeneration temperature that is the temperature adjustment target value of the regeneration air by the regeneration heater. Generally, the lower the rotor speed (or regeneration temperature) is, the more energy is saved because the amount of heat required for heating regeneration is reduced, but the dew point of the supply air (dehumidified air) is increased. Further, when compared at the same rotor rotational speed (or regeneration temperature), the dew point of the supply air tends to decrease as the absolute humidity at the inlet of the dehumidifying zone decreases. The “preferred” operating condition referred to in the present invention can minimize the amount of heat required for regeneration of the dehumidifying unit in a state where the dew point of the supply air satisfies a predetermined range (set value or target value range). This refers to the operating conditions, especially when the partial load operation with a small dehumidifying load such as in winter is more effective.

  Further, in the present invention, the dehumidification unit is a dehumidification rotor that is repeatedly assigned in the order of the dehumidification zone, the regeneration zone, and the purge zone by rotating at a set number of revolutions per unit time, and obtaining the suitable operating condition In the dehumidifying device, the means includes a suitable rotor rotational speed that minimizes the amount of heat required for regeneration of the dehumidifying rotor while the dew point of the dehumidified air is within the predetermined range, and the humidity of the air to be dehumidified. The preferred rotor rotational speed corresponding to the estimated humidity is acquired based on the preferred operating condition information indicating the relationship, and the zone changing means rotates the dehumidification rotor according to the acquired preferred rotor rotational speed. The dehumidification rotor may be repeatedly assigned in the order of the dehumidification zone, the regeneration zone, and the purge zone.

  More specifically, when the humidity of the air to be dehumidified is low, a smaller dehumidifying capacity is sufficient. Therefore, when the rotor speed is lowered and the humidity is high, a larger dehumidifying capacity is required. This can be done by increasing the rotor speed. Then, in a state where the dew point of the dehumidified air satisfies a predetermined range (set value or target value range) and the amount of heat required for regeneration of the dehumidifying rotor is minimized, Humidity has a certain relationship. Therefore, in the present invention, the relationship between the humidity to be dehumidified in the dehumidifier and the rotor speed suitable for energy consumption is examined in advance by simulation or experiment, and the rotor speed is determined from the estimated humidity according to this relationship. It was decided to. The present invention can be applied to, for example, a so-called adsorption rotor type dry dehumidifier. Further, the number of revolutions per unit time may be set by the number of revolutions itself (for example, the number of revolutions per minute), or set by the rotational speed (for example, the rotational angle per second, the rotational distance, etc.). May be.

  In the present invention, the purge air volume, which is the air volume of the air introduced into the purge zone, may be controlled to change in proportion to the change in the rotor rotational speed.

  In particular, when the air volume used for regeneration (regeneration air volume) is controlled based on the outlet temperature of the purge zone, the temperature distribution at the outlet of the purge zone is kept constant even when the rotor speed is changed. It is preferable to sag. For this purpose, it is necessary to make the total purge air volume (purge air volume * purge time) constant. Since the purge time is inversely proportional to the rotor rotational speed, it is preferable to make the purge air volume proportional to the rotor rotational speed in order to keep the total purge air volume constant.

  For example, when the rotor rotational speed is decreased, the dehumidification rotor stays in the purge zone for a long time, so that the dehumidification rotor can be cooled with a smaller purge air volume. In particular, in a dehumidifying apparatus that uses a part of dehumidified air for purging under a general design condition in which the supply air volume to the load of dehumidified air is constant, it is inevitable that the purge air volume is reduced. Since the amount of dehumidified air is also reduced, it is desirable that the purge air amount be controlled to be proportional to the rotor rotational speed.

Further, in the present invention, the suitable operating condition acquisition means has a relationship between the suitable operating condition, the humidity of the air to be dehumidified, and the amount of dehumidified air that is the amount of air introduced into the dehumidified area. Based on the preferable operating condition information shown, the preferable operating condition corresponding to the estimated humidity and the dehumidified air volume acquired by the estimated humidity acquiring means may be acquired.

  That is, in the present invention, the relationship between the humidity to be dehumidified and the amount of dehumidified air and the operating conditions suitable for energy consumption (for example, the rotor rotational speed) is examined in advance by simulation or experiment, and the preferable operating conditions are determined according to this relationship. It may be determined. By using the dehumidified air volume in addition to the estimated humidity as the information for acquiring the preferred operating condition, it is possible to obtain a more accurate preferred operating condition.

  Further, the dehumidifying device according to the present invention includes a differential pressure acquisition means for acquiring a differential pressure between the air before being introduced into the dehumidifying zone and the air after passing through the dehumidifying zone, and the difference prepared in advance. An estimated air volume acquisition means for acquiring an estimated dehumidification air volume of air introduced into the dehumidification area, corresponding to the differential pressure acquired by the differential pressure acquisition means, based on a correspondence relationship between a pressure and the dehumidification air volume; The preferable operating condition acquisition unit may acquire the preferable operating condition corresponding to the estimated humidity acquired by the estimated humidity acquiring unit and the estimated dehumidified air volume acquired by the estimated air volume acquiring unit. Good.

  Further, the dehumidifying apparatus according to the present invention includes a differential pressure acquisition means for acquiring a differential pressure between air before being introduced into the purge zone and air after passing through the purge zone, and the difference prepared in advance. An estimated air volume acquisition means for acquiring an estimated purge air volume of the air introduced into the purge area corresponding to the differential pressure acquired by the differential pressure acquisition means based on a correspondence relationship between a pressure and the purge air volume; Further, the estimated purge air volume may be controlled to change in proportion to the change in the rotor rotational speed.

  An air flow meter may be used for obtaining the air flow, but as described above, the air flow may be estimated based on the differential pressure. An air flow meter, like a hygrometer, may have a problem of erroneous measurement and maintenance, and thus it is possible to easily perform accurate control by acquiring the air flow by estimation.

  In the present invention, the temperature of the air introduced into the regeneration zone is adjusted by a regeneration heater so that the regeneration temperature is set, and the suitable operating condition acquisition unit is dehumidified in the dehumidifier. Based on the preferred operating condition information indicating the relationship between the preferred regeneration temperature at which the amount of heat required for regeneration of the dehumidifying unit is minimized while the dew point of air is within the predetermined range, and the humidity of the air to be dehumidified, The suitable regeneration temperature corresponding to the estimated humidity may be acquired, and the regeneration heater may adjust the temperature of the air introduced into the regeneration zone so that the temperature of the air becomes the suitable regeneration temperature.

  More specifically, when the humidity of the air to be dehumidified is low, a smaller dehumidifying capacity is sufficient, so this can be dealt with by lowering the regeneration temperature, and when the humidity of the air to be dehumidified is high, Since large dehumidifying capacity is required, it can be handled by raising the regeneration temperature. In addition, a depletion point of the dehumidified air that satisfies a predetermined range (set value or target value range), and a suitable regeneration temperature that minimizes the amount of heat required to adjust the temperature of the air used for regeneration, and a dehumidification target The air humidity has a certain relationship. Therefore, in the present invention, the relationship between the humidity to be dehumidified in the dehumidifying device and the regeneration temperature suitable for energy consumption is examined in advance by simulation or experiment, and the regeneration temperature is determined from the estimated humidity according to this relationship. It was.

Further, in the present invention, the regeneration air volume control means is configured so that the outlet air temperature at a position near the regeneration zone in the purge zone is based on the temperature of the purged air that has been mixed and made uniform after passing through the purge zone. However, the amount of regeneration air introduced into the regeneration zone may be controlled so that the temperature is higher than the outlet temperature at the position near the purge zone in the regeneration zone and is equal to or higher than a predetermined regeneration completion temperature.

  According to the study by the inventors of the present application, after passing through the purge zone with the purge air amount kept constant, the temperature distribution disappears (the state after mixing and the temperature is equalized). It has been found that the temperature has a correlation with the regenerative air volume ratio that indicates the ratio of the regenerative air volume to the air volume in the dehumidified area. Therefore, in the control of the regenerative air volume, a method of measuring the temperature of the purged air that has been mixed after passing through the purge zone and the temperature becomes uniform, and determining the regenerative air volume based on this temperature is adopted. Good. Even with such a method, the regeneration air volume is adjusted so that the outlet temperature near the regeneration zone in the purge zone is higher than the outlet temperature at the purge zone in the regeneration zone and is equal to or higher than the regeneration completion temperature. Can be controlled.

  In addition, this invention can be grasped | ascertained also as invention of the method of controlling a dehumidification apparatus. For example, in the present invention, a dehumidification rotor for dehumidifying passing air is dehumidified by passing the air to be dehumidified, and a dehumidification area for keeping the dew point within a predetermined range, and temperature-controlled air. Sorting means for classifying into a regeneration zone for regenerating the dehumidifying capacity of the dehumidifying rotor by passing it, and a purge zone for releasing heat of the dehumidifying rotor by passing air, and the dehumidifying rotor, A dehumidifying device comprising: a zone changing means that repeatedly assigns the dehumidifying zone, the regeneration zone, and the purge zone in order by rotating at a set number of revolutions per unit time. The outlet temperature at the position of the regeneration zone is higher than the outlet temperature at the position near the purge zone in the regeneration zone and is equal to or higher than a predetermined regeneration completion temperature. A correspondence relationship between a regenerative air volume control step for controlling the regenerative air volume to be introduced into the area, a preliminarily prepared regenerative air volume control target in the regenerative air volume control step, and a humidity of the air to be dehumidified. Based on the estimated humidity acquisition step of acquiring the estimated humidity of the air to be dehumidified corresponding to the preferable regeneration air volume, and the dehumidification of the dehumidified air prepared in advance while remaining within the predetermined range. Based on the preferable operating condition information indicating the relationship between the preferable operating condition that is the operating condition that minimizes the amount of heat required for the regeneration of the rotor and the humidity of the air to be dehumidified, the acquired in the estimated humidity acquisition step A suitable operating condition acquisition step for acquiring the preferable operating condition corresponding to the estimated humidity, and the number of revolutions of the dehumidification rotor in the dehumidifying device and the previous It executes a control step for controlling at least one of the temperature of the regeneration air, a control method of the dehumidifier.

  The present invention is a method for variably controlling the rotor rotational speed and regeneration temperature of the dehumidifying device, and it is possible to easily realize variable control operation with higher stability.

It is a figure which shows the structure of the system for supplying the low dew point air provided with the dry-type dehumidification apparatus which concerns on embodiment. It is a perspective view which shows the dehumidification rotor and section division | segmentation cassette in embodiment. In an embodiment, it is a figure showing a position of a temperature sensor provided in order to measure an exit temperature of a position near a regeneration zone in a purge zone. It is a figure which shows the relationship between the position angle of the rotation direction of the rotor of a dehumidifier, and the exit temperature in a regeneration zone and a purge zone in embodiment. It is a figure which shows the exit air temperature in the rotation direction coordinate (position angle) for every regeneration air volume ratio in a regeneration zone and a purge zone. It is a figure which shows the correlation between the temperature of the reproduction | regeneration air volume ratio shown to FIG. 4B, and the temperature of the air after purge which became uniform and temperature distribution disappeared. It is a figure which shows the relationship between the suitable reproduction | regeneration air volume and the absolute humidity of dehumidification zone inlet air for every rotor rotation speed in the dry-type dehumidification apparatus which concerns on embodiment. It is a figure which shows the relationship between the suitable reproduction | regeneration air volume and the absolute humidity of dehumidification zone inlet air for every regeneration temperature in the dry-type dehumidification apparatus which concerns on embodiment. It is a figure which shows the relationship between the suitable rotor rotation speed and the absolute humidity of dehumidification zone inlet air in embodiment. It is a figure which shows the relationship between suitable regeneration temperature and the absolute humidity of dehumidification zone inlet air in embodiment. It is a figure which shows the example of the relationship between the dew point temperature of the dehumidification zone exit air in the dehumidification zone passage surface wind speed = 2.0 meters / second, and rotor rotation speed. It is a figure which shows the example of the relationship between the dew point temperature of the dehumidification zone exit air in the dehumidification zone passage surface wind speed = 2.0 meters / second, and regeneration temperature. It is a figure A which shows the energy-saving effect acquired by control concerning an embodiment. It is a figure B which shows the energy-saving effect acquired by control concerning an embodiment. It is a figure which shows the example of the detection position of a differential pressure | voltage and temperature in the case of calculating zone air flow volume by estimation based on a differential pressure | voltage and temperature. It is a figure which shows the variation of the processing flow of the dehumidification system to which this invention is applied. It is a figure which shows the temperature change of the discharge air in the conventional dehumidification apparatus.

  Hereinafter, embodiments of a dehumidifying apparatus according to the present invention will be described with reference to the drawings. In the present embodiment, the case where the present invention is applied to an adsorption rotor type dry dehumidifier is described. However, the present invention is not limited to an adsorption rotor type dry dehumidifier, and is a cycle of dehumidification, regeneration, and purge. Therefore, any dehumidifying device in which regeneration of the dehumidifying capacity is performed can be applied. For example, according to the present invention, a rectangular air dehumidifying unit having a moisture absorbing agent disposed therein is provided with a regenerating air duct for inserting regenerating air from an open end of the dehumidifying unit, and the regenerating air duct is connected to the dehumidifying unit. The present invention can also be applied to a reciprocating dehumidifier of the type that reciprocates relatively (which may be a regenerative air duct or a dehumidifying unit that is actually driven by a motor or the like). Further, the present invention can be applied regardless of the zone division ratio of the dehumidification rotor and the size of the dehumidification rotor, and can also be applied to a dehumidification apparatus having a plurality of stages of dehumidification rotors.

  FIG. 1 is a diagram illustrating a configuration of a system for supplying low dew point air to a low dew point space such as a low dew point room, which includes the dry dehumidifier according to the present embodiment. FIG. 2 is a perspective view showing a dehumidification rotor and a section division cassette in the present embodiment. The dry dehumidifying apparatus 1 includes a dehumidifying rotor 11 that dehumidifies the air passing through the interior of the substrate by impregnating the substrate with a moisture absorbent such as synthetic zeolite, silica gel, or lithium chloride. . Section division cassettes 12 and 13 are arranged on both end faces of the dehumidification rotor 11, and air is introduced into and discharged from the dehumidification rotor 11 through the section division cassettes 12 and 13. Here, the dehumidifying rotor 11 corresponds to the dehumidifying unit of the present invention, and the section dividing cassettes 12 and 13 correspond to the sorting means of the present invention.

  Each of the section division cassettes 12 and 13 is divided to divide the dehumidification rotor 11 into a dehumidification zone 11a, a regeneration zone 11b, and a purge zone 11c. The section dividing cassette 12 has a dehumidification zone inlet 12a for introducing air to be dehumidified into the dehumidification zone 11a, a regeneration zone outlet 12b for discharging air used for regeneration of the dehumidification capacity from the regeneration zone 11b, And a purge zone outlet 12c for discharging purge air from the purge zone 11c. The section dividing cassette 13 has a dehumidifying zone outlet 13a for discharging the dehumidified air from the dehumidifying zone 11a, and a regeneration zone. A regeneration zone inlet 13b for introducing air used for regeneration into 11b and a purge zone inlet 13c for introducing purge air into the purge zone 11c are provided.

  The dehumidifying rotor 11 is driven and rotated by the gear motor 72 with the section dividing cassettes 12 and 13 provided at both ends. Here, as described above, the inside of the section division cassettes 12 and 13 is divided in order to divide the dehumidification rotor 11 into the dehumidification zone 11a, the regeneration zone 11b, and the purge zone 11c in order in the rotation direction of the dehumidification rotor 11. For this reason, the air passage area of the dehumidifying rotor 11 is divided into three sections (in the order of the dehumidifying zone 11a, the regeneration zone 11b, and the purge zone 11c in the rotational direction of the dehumidifying rotor 11). Thus, each part of the dehumidifying rotor 11 corresponds to the dehumidifying zone 11a, the regeneration zone 11b, and the purge zone 11c in order. For this reason, dehumidification by the dehumidification rotor 11, regeneration of the dehumidification capability of the dehumidification rotor 11, and purging of the dehumidification rotor 11 that has become high temperature due to regeneration are repeated, and the dehumidification performance of the dry dehumidifier is maintained. The gear motor 72 is controlled by the control unit CU. That is, the gear motor 72 and the control unit CU that controls the gear motor 72 correspond to the area changing means of the present invention.

  Each of the dehumidifying zone 11a, the regeneration zone 11b, and the purge zone 11c is a zone that is radially divided around the rotation axis of the dehumidifying rotor 11 (see FIG. 2). In this embodiment, the dehumidification zone 11a is 270 degrees, the regeneration zone 11b is 60 degrees, and the size of the area that each zone occupies in the entire section division cassette is expressed by an angle around the rotation axis of the dehumidification rotor 11. The zone 11c is 30 degrees (see FIG. 3). In addition, ducts are connected to the respective entrances / exits provided in the section division cassettes 12 and 13.

  A dehumidification duct 22 for taking in air to be dehumidified is connected to the dehumidification zone inlet 12 a of the section division cassette 12. The dehumidifying duct 22 is further provided with a fan 21, and air to be dehumidified is taken in by the operation of the fan 21.

  A supply duct 24 for supplying dehumidified low dew point air to the low dew point space is connected to the dehumidification zone outlet 13 a of the section dividing cassette 13. The air taken in from the dehumidifying duct 22 is dehumidified by the action of a hygroscopic agent or the like in the dehumidifying rotor 11 and is discharged from the dry dehumidifier through the supply duct 24. Note that a set dew point that is a target value is set in the dry dehumidifier, and when the dry dehumidifier is operating as expected, the air to be dehumidified taken in from the dehumidification duct 22 is below this set dew point. Until it is dehumidified and discharged to the supply duct 24.

  A purge introduction duct 25 is connected to the purge zone inlet 13c of the section dividing cassette 13 for introducing air for lowering the temperature of the hygroscopic agent regenerated through the regeneration zone 11b. In addition to being connected to the low dew point space, the supply duct 24 is also connected to a purge introduction duct 25 for introducing air into the purge zone 11c, and a part of the air discharged to the supply duct 24 has a low dew point. It is supplied to the space and a part thereof is introduced into the purge zone 11 c through the purge introduction duct 25. The supply amount to the low dew point space and the introduction amount to the purge zone 11c are adjusted by controlling the supply damper provided in the supply duct 24 and the purge introduction damper provided in the purge introduction duct 25. .

  A purge exhaust duct 26 for discharging the air used for the purge is connected to the purge zone outlet 12 c of the section dividing cassette 12. Further, a regeneration exhaust duct 27 for exhausting air used for regeneration of the moisture absorbent used for dehumidification is connected to the regeneration zone outlet 12b of the section dividing cassette 12. The purge exhaust duct 26 joins the regeneration exhaust duct 27 before the regeneration fan 31. For this reason, the air used for the purge and the air used for the regeneration are sucked out by the regeneration fan 31, and a part thereof is exhausted outside the system.

  A regeneration introduction duct 32 is connected to the regeneration zone inlet 13b of the section division cassette 13 for introducing air used for regeneration of the moisture absorbent used for dehumidification. The regeneration introduction duct 32 is connected to the regeneration exhaust duct 27 and includes a regeneration heater 33 on the way. Therefore, after the air used for purging and the air used for regeneration are sucked out by the regeneration fan 31, a part of the air is exhausted out of the system and a part is sent to the regeneration introduction duct 32. The exhaust amount outside the system and the introduction amount to the regeneration introduction duct 32 are adjusted by controlling the exhaust damper provided in the regeneration exhaust duct 27 and the circulation damper provided in the regeneration introduction duct 32. .

  The air sent to the regeneration introduction duct 32 is heated by the regeneration heater 33 and then introduced into the regeneration zone 11b. The regeneration heater 33 is controlled by a temperature controller 45 that acquires a detection result of a temperature sensor 44 provided between the regeneration heater 33 and the regeneration zone inlet 13b, so that the regeneration air introduced into the regeneration zone 11b is controlled. Adjust the temperature to the set regeneration temperature. The dehumidifying capacity of the part of the dehumidifying rotor 11 at the position corresponding to the regeneration zone 11b is regenerated by the regenerating air and then moved to the position corresponding to the dehumidifying zone 11a, so that it is used again for dehumidification.

<Control of regeneration air volume>
In the dehumidifying apparatus according to the present embodiment, the regeneration air volume is controlled prior to (or simultaneously with) the process of estimating the absolute humidity of the dehumidifying zone inlet air according to the present invention and controlling the rotor rotational speed and / or the regeneration temperature. Is called. Note that the regeneration air volume is the air volume of air (air heated to a high temperature in this case) used for regeneration of the dehumidification capacity of the dehumidification rotor 11 by being introduced into the regeneration zone 11b. The regeneration fan 31 provided in the regeneration introduction duct 32 has an air volume measured by an air flow meter 46 provided downstream of the regeneration fan 31 as a set target regeneration air volume (in the present embodiment, a method described below). The determined suitable regeneration air volume is set to the target regeneration air volume). However, other methods may be employed for controlling the reproduction air volume in accordance with the embodiment.

  FIG. 13 is a diagram showing a temperature change of exhaust air in a conventional dehumidifier. According to the temperature change shown in FIG. 13, it can be seen that the regeneration is completed completely in the regeneration zone 11b and only the rotor is cooled in the purge zone 11c. The heat of the regeneration air is first used to increase the temperature of the rotor (a to d in the figure), and then used as the heat of desorption of adsorbed moisture (de to e in the figure). And with the completion | finish of moisture desorption, temperature rises further (ef in a figure). Conventionally, a temperature sensor is provided near the purge zone 11c in the regeneration zone 11b, and the regeneration air volume is controlled such that the regeneration completion temperature is detected by this temperature sensor. For this reason, conventionally, the heat applied to the rotor after the completion of moisture desorption has reduced the processing efficiency in regeneration and purging. Here, the regeneration completion temperature is a reference temperature for determining whether or not the regeneration of the rotor has been completed based on the temperature of the air that has passed through the rotor, and is set in advance to, for example, 100 degrees Celsius. Yes.

  On the other hand, in this embodiment, in the control of the regeneration air volume, even if regeneration is not completely completed in the regeneration zone 11b, the purge air is heated in the purge zone 11c by the heat accumulation of the rotor, and the dehumidification capability is regenerated. Focusing on this, regeneration is completed in the purge zone 11c. That is, the regeneration air volume is set so that the outlet temperature at the position near the regeneration zone 11b in the purge zone 11c is higher than the exit temperature at the position closest to the purge zone 11c in the regeneration zone 11b and equal to or higher than the regeneration completion temperature. I decided to control it.

FIG. 3 is a diagram showing the position of the temperature sensor 41 provided for measuring the outlet temperature at a position near the regeneration zone 11b in the purge zone 11c in the present embodiment. The regeneration air volume is controlled so that the regeneration completion temperature is detected by the temperature sensor 41 installed at the position shown in the figure, so that the regeneration air volume is not completely regenerated in the regeneration zone 11b and purged. In the zone 11c, the regeneration air volume is set such that the regeneration is completed by the purge air heated by the heat stored in the rotor, thereby improving the efficiency of the apparatus. Here, the position near the regeneration zone 11b in the purge zone 11c indicates a position closer to the regeneration zone 11b side than the center of the purge zone 11c.

  FIG. 4A is a diagram illustrating a relationship between the position angle θ in the rotation direction of the rotor of the dehumidifier and the outlet temperatures in the regeneration zone 11b and the purge zone 11c in the present embodiment. Up to A to E in the figure, the heat of the regeneration air is first used to increase the temperature of the rotor (A to D in the figure), and then used as heat of desorption of adsorbed moisture (D to D in the figure). E). Here, in this embodiment, since the regeneration air volume is controlled so that the regeneration completion temperature is detected by the temperature sensor 41 shown in FIG. 3, the rotor is in the purge zone immediately before the regeneration of the rotor is completed. Will be transferred to. Here, in the rotor in the state E in the figure, most of the region except for the vicinity of the outlet reaches about 140 degrees Celsius. Further, since the heat capacity per volume of the rotor is much larger than the heat capacity of air, the rotor in the E state is in a high temperature heat storage state. When low-temperature purge air is allowed to flow through the rotor, the purge air is quickly heated to about 140 degrees Celsius, and the moisture absorbent that has not been regenerated is regenerated (F to G). By such processing, the dehumidifying apparatus according to the present embodiment saves energy required for regeneration as compared with the conventional case.

  According to the study by the present inventors, in a state where the purge air flow is constant, the temperature distribution after the purge zone 11c has disappeared (the temperature of the purged air is mixed and the purged air is mixed). The air temperature after purging (in other words, the average temperature of the outlet air of the purge zone 11c) in each of the regeneration zone 11b and the purge zone 11c according to the change in the regeneration air flow ratio (= regenerative air amount / dehumidified air amount). It has been found that there is a correlation with the outlet temperature distribution. Here, the regeneration air volume ratio refers to the ratio of the regeneration air volume to the air volume that passes through the dehumidification zone (the process air volume of the dehumidifier).

  FIG. 4B is a diagram showing the outlet air temperature at the rotation direction coordinate (position angle) for each regeneration air volume ratio in the regeneration zone 11b and the purge zone 11c. In the example shown in FIG. 4B, when the regeneration air volume is reduced (when the value of the regeneration air volume ratio is decreased), the distribution curve of the outlet air temperature shifts to the right in the figure, and approaches the regeneration zone in the purge zone 11c. It can be seen that there is a regeneration air volume ratio in which the outlet temperature at any of the points is higher than the outlet temperature at the position closest to the purge zone 11c in the regeneration zone 11b and equal to or higher than the regeneration completion temperature.

  FIG. 4C is a diagram showing a correlation between the regeneration air volume ratio shown in FIG. 4B and the temperature of the purged air that has been made uniform with no temperature distribution. According to FIG. 4C, it can be seen that there is a correlation between the regeneration air volume ratio and the temperature of the purged air that has been made uniform with no temperature distribution. For this reason, in the above-described control of the regeneration air volume, the outlet temperature at the position near the regeneration zone 11b in the purge zone 11c shown in FIG. 3 is directly measured by the temperature sensor 41, and the regeneration air volume is based on this temperature. Instead of the method of determining the temperature, the temperature of the purged air that has become uniform with no temperature distribution is measured using a temperature sensor (not shown) provided in the purge exhaust duct 26, and the regeneration is performed based on this temperature. A method for determining the air volume may be employed. Also by such a method, the outlet temperature at the position near the regeneration zone 11b in the purge zone 11c is higher than the outlet temperature at the position closest to the purge zone in the regeneration zone 11b and is equal to or higher than the regeneration completion temperature. It is possible to control the regeneration air volume.

<Control using preferred regeneration air volume>
Furthermore, the dry dehumidifier according to the present embodiment realizes an efficient operation by controlling the rotor rotational speed and the regeneration temperature by the control arithmetic unit CU. Further, in the present embodiment, the preferred rotor rotational speed or the preferred regeneration temperature is calculated from the preferred regeneration air volume used in the above-described control of the regeneration air volume.

In the vicinity of the dehumidification zone inlet 12a of the dehumidification duct 22, a temperature sensor 42 for measuring the temperature of the air to be dehumidified is provided. Temperature sensor 42 is, through the dehumidifying duct 22 to measure the temperature of the air taken into the dry dehumidifier (inlet air temperature T _A), and transmits a temperature T _A which is measured to the control arithmetic unit CU. An air flow meter 23 is provided in the dehumidifying duct 22. The air flow meter 23 measures the air volume taken into the dry dehumidifier via the dehumidification duct 22 and transmits an air volume signal to the control arithmetic unit CU. The control arithmetic unit CU calculates the dehumidifying zone surface wind speed v _pro based on the input air volume signal.

Figure 5A, in a dry dehumidifier according to the present embodiment, when applying the control of the reproduction air volume above description shows the relationship between absolute humidity x _A preferred regeneration air volume dehumidification zone inlet air for each rotor rotational speed FIG. Further, FIG. 5B, in a dry dehumidifier according to the present embodiment, the control of regeneration air quantity described above when applied, preferably reproduction air volume and the relationship between the absolute humidity x _A dehumidification zone inlet air for each regeneration temperature FIG. 5A and 5B show the case where the wind speed of the dehumidification zone surface is 2.0 meters / second.

The control of the reproduction air amount described above, the reproduction air volume, the rotor rotational speed omega, the regeneration temperature T _reg, dividing Shimekazeryou F _pro, suitable reproduction airflow against dehumidification zone inlet temperature T _A and dehumidification zone inlet absolute humidity x _A and It is controlled to become. That is, the dehumidification zone inlet absolute humidity x _A, preferred regeneration airflow F _{reg, opt,} the rotor rotational speed omega, the regeneration temperature T _reg, dividing Shimekazeryou F _pro and dehumidification zone inlet temperature T _A is have a certain relevance You can see that Therefore, on the contrary, the absolute humidity x _A of the dehumidification zone inlet air can be estimated from the preferable regeneration air amount F _{reg, opt} , the rotor rotation speed ω, the regeneration temperature T _reg , the dehumidification air amount F _pro and the dehumidification zone inlet temperature T _A. it can. For this reason, experiments and simulations have been conducted in advance on the relationship between the preferred regeneration air volume F _{reg, opt} , rotor rotational speed ω, regeneration temperature T _reg , dehumidification air volume F _pro and dehumidification zone inlet temperature T _A, and dehumidification zone inlet absolute humidity x _A Are stored in the storage device of the control arithmetic unit CU as estimated humidity information in the form of a relational expression (for example, the following expression (1)) or a humidity estimation processing map. The control arithmetic unit CU then selects the suitable regeneration air volume F _{reg, opt} determined by the regeneration air volume control, the currently set rotor rotational speed ω and the regeneration temperature T _reg , and the dehumidification air volume F _pro measured by the air volume meter 23. When the dehumidifying zone inlet temperature T _A measured by the temperature sensor 42 is received, the absolute humidity x _A of the dehumidifying zone inlet air is estimated by performing calculation using this relational expression or referring to the humidity estimation processing map. . Control calculation unit CU, preferably reproduction airflow F _{reg, opt,} the rotor rotational speed omega, the regeneration temperature T _reg, removal Shimekazeryou F _pro and dehumidification zone inlet temperature T _A by calculating by substituting the equation (1), preferably It can be estimated absolute humidity x _a dehumidification zone inlet air according to the regeneration air volume.

x _A = f (F _{reg, opt} , ω, T _reg , F _pro , T _A ) (1)

Control arithmetic unit CU uses the absolute humidity x _A of the dehumidification zone inlet air, when the humidity is low, lower the rotor rotational speed (or lower the regeneration temperature), when the humidity is high increase the rotor rotational speed (or regeneration temperature Variable control is performed.

6, in this embodiment, showing the relationship between the absolute humidity x _A zone inlet air dehumidification preferred rotor rotational speed omega _opt. Further, FIG. 7, in this embodiment, showing the relationship between the absolute humidity x _A preferred regeneration temperature T _reg, zone inlet air dehumidification _opt. This relationship is also examined in advance by experiments, simulations, etc., and a relational expression (see the following expressions (2) and (3)) and a rotor speed control map (see FIG. 6). Alternatively, it is stored in the storage device of the control arithmetic unit CU as estimated humidity information in a format such as a regeneration temperature control map (see FIG. 7).

ω _opt = f (v _pro , x _A , T _reg , T _A ) (2)

T _{reg, opt} = f (v _pro , x _A , ω, T _A ) (3)

Next, the overall flow of the process for determining the operating conditions using the temperature of the air at the dehumidifying zone inlets 12a and 13a will be described. First, the control arithmetic unit CU has a suitable regeneration air volume F _{reg, opt} determined by the control of the regeneration air volume, the currently set rotor rotational speed ω and the regeneration temperature T _reg , and the dehumidification air volume F _pro measured by the air volume meter 23. Based on the dehumidification zone inlet temperature T _A measured by the temperature sensor 42, the humidity estimation processing map is referred to calculate the dehumidification zone inlet absolute humidity x _A (from the equation (1)). Further, the control arithmetic unit CU calculates the dehumidifying zone surface wind speed v _pro based on the air volume signal input from the air flow meter 23. However, as the air volume of the air passing through each zone such as the dehumidifying zone, the air volume obtained by the estimation process using the equation (4) described later may be used regardless of the measurement by the air flow meter. Then, the control arithmetic unit CU performs any control determined in advance among “control of the rotational speed”, “control of the regeneration temperature”, and “control of the rotational speed and the regeneration temperature”.

When controlling the rotational speed, the control calculation unit CU, dehumidification zone surface wind velocity v _pro, absolute humidity x _A dehumidification zone inlet air, the regeneration temperature T _reg, to apply the inlet air temperature T _A in the formula (2), The preferred rotational speed ω _opt is calculated with reference to the rotor rotational speed control map. Using this preferred rotational speed as a target value, the rotational speed of the motor that drives the dehumidifying rotor 11 is adjusted.

When controlling the regeneration temperature, the control arithmetic unit CU applies the dehumidification zone surface air velocity v _pro , the absolute humidity x _A , ω of the dehumidification zone inlet air, and the inlet air temperature T _A to the equation (3), or controls the regeneration temperature control. The preferable regeneration temperature T _{reg, opt} is calculated with reference to the map. The regeneration heater output is adjusted with the preferred regeneration temperature as a target value.

In the case of controlling both the rotational speed and the regeneration temperature, the control arithmetic unit CU performs a suitable rotation created in advance based on the dehumidification zone surface wind speed v _pro , the dehumidification zone inlet air absolute humidity x _A , and the inlet air temperature T _A. The calculation formula of the combination of the number and regeneration temperature or the rotor rotation speed / regeneration temperature control map, etc. is recorded in the storage device, and the calculation using the calculation formula or reference of the map is performed, so that the rotor rotation speed and regeneration are performed. A suitable combination with temperature is calculated. Using this preferred rotational speed and preferred regeneration temperature as target values, the rotational speed of the motor that drives the dehumidifying rotor 11 and the regeneration heater output are adjusted.

<Effect>
FIG. 8 is a diagram showing an example of the relationship between the dew point temperature T _{d, B of the} dehumidification zone outlet air and the rotor rotational speed ω at the dehumidification zone passage surface wind speed v _pro = 2.0 meters / second. When the rotor rotation speed is constant, the dehumidification zone inlet air as the absolute humidity _{x A [g / kg (DA} )] is reduced, dew point temperature T _d of the dehumidification zone outlet _{air, since B} is reduced, excessive Dehumidification will be performed. According to the control of the rotor rotational speed according to the present embodiment, when the absolute humidity x _A dehumidification zone inlet air is low, the control to slow the rotor rotational speed ω to the extent that the supply air dew point satisfies the design specifications Therefore, the dehumidification rotor staying time in the regeneration zone 11b becomes longer, and regeneration can be performed with a smaller amount of regeneration heat (with a smaller amount of regeneration air).

FIG. 9 is a diagram illustrating an example of the relationship between the dew point temperature T _{d, B} and the regeneration temperature T _reg of the dehumidification zone outlet air when the dehumidification zone passage surface wind speed v _pro = 2.0 meters / second. When the regeneration temperature T _reg is constant, the dew point temperature T _{d, B} of the dehumidification zone outlet air decreases as the absolute humidity x _A of the dehumidification zone inlet air decreases, so that more dehumidification is performed. . According to the control of the regeneration temperature of this embodiment, when the absolute humidity x _A dehumidification zone inlet air is low, to control to lower the regeneration temperature T _reg in a range that supply air dew point satisfies the design specifications The temperature increase range of the dehumidifying rotor 11 in the regeneration zone 11b is reduced, and the amount of heat required for heating and regeneration is reduced.

FIG. 10A and FIG. 10B are diagrams showing the energy saving effect (regeneration heat amount ratio when the regeneration heat amount during rated operation is 100%) obtained by the control according to the present embodiment. The wind speed on the surface passing through the dehumidification zone was set to 2 cases: v _pro = 2.0 meters / second (rated) and v _pro = 1.0 meters / second. The purge surface air speed was determined by equation (4), and the regeneration air volume was controlled by the above-described process.

According to FIG. 10A, and the results shown in FIG. 10B, at the time of partial load of _{x in = 0.5 g / kg (} DA), when performing the "control of the rotational speed", to the time of operation at the rated speed , V = 2.0 meters / second, approx. 27%, v = 1.0 meters / second, approx. 58% reduction in regeneration heat, and when “regeneration temperature control” is performed, v It can be seen that the amount of regenerative heat can be reduced by about 10% at = 2.0 meters / second and about 22% at v = 1.0 meters / second. In order to obtain such an energy saving effect, it was necessary to use a hygrometer or a dew point meter in the prior art, but according to the dry dehumidifier according to this embodiment, it is equivalent to this without using a hygrometer or a dew point meter. Energy saving effect can be obtained. The stability of the dehumidifying performance is improved as compared with the conventional technology, and the periodic calibration work of the hygrometer and the dew point meter is not required, and maintenance is facilitated.

<Modification: Measuring method of air volume>
FIG. 11 is a diagram illustrating an example of a differential pressure and temperature detection position when the zone air flow rate is calculated by estimation based on the differential pressure and temperature. If a temperature sensor and a differential pressure gauge dP are installed and measured in each zone as shown in FIG. 11, the ventilation air volume in each zone can be obtained by the following formula without using an air flow meter. As with the hygrometer and the like, the air flow meter may have a problem of erroneous measurement and maintenance, and therefore, the method based on the estimation may give better results from the viewpoint of the stability of the dehumidification performance. In addition, when estimating an air volume based on a differential pressure and temperature, the following formula | equation (4) can be used.

・・・式（４）

... Formula (4)

  Note that in the measurement of the air temperature at the zone outlet necessary for the calculation of the equation (4), it is necessary to measure the air temperature at which the temperature distribution disappears at the zone outlet. In particular, in the purge zone 11c and the regeneration zone 11b, the dehumidifying rotor outlet is measured. Since the temperature distribution in the section is large, mixing is difficult to perform and accurate outlet temperature measurement may not be performed. If the duct flow path is long, this temperature distribution disappears naturally. However, if the duct flow path is lengthened, there may be a case where the outlet temperature originally intended to be measured cannot be accurately measured due to a heat dissipation loss from the duct. Therefore, for example, the zone outlet air may be stirred, and the air after stirring may be used as the zone outlet air to measure the temperature. Such agitation may be performed by a damper, a propeller, a rectifying plate, or an elbow provided in the zone outlet side air flow path. Alternatively, a plurality of temperature sensors may be inserted into the zone outlet side cassette unit at regular intervals (in the position angle direction) without stirring, and the temperature average value may be used as the zone outlet air temperature.

<Modification: Control of purge air volume>
In addition, when the rotational speed of the dehumidifying rotor 11 is decreased, the dehumidifying rotor stays in the purge zone 11c for a long time, so that the dehumidifying rotor 11 can be cooled with a smaller amount of purge air. In particular, in a system in which a part of the dehumidification air volume is used for the purge air volume, if the purge air volume is reduced, the dehumidification air volume will inevitably decrease, so it is provided in the regeneration fan speed (inverter control) or the purge flow path. It is desirable to control the amount of purge air to be proportional to the rotor speed by adjusting the opening of the damper. The preferred purge surface wind speed corresponding to the preferred rotor speed is calculated by the following equation (5).

Preferred purge surface wind speed = Rated purge surface wind speed x Suitable rotor speed / Rated rotor speed (5)

  FIG. 12 is a diagram showing variations of the processing flow of the dehumidification system to which the present invention is applied. In the table shown in FIG. 12, column A shows a dehumidifier in which the flow direction of the dehumidification air and the flow direction of the purge air in the dehumidification rotor 11 are the same direction, and the flow direction of the regeneration air is the opposite direction. Column B shows a dehumidifying device in which the flow of the regeneration air and the purge air is opposite to the flow direction of the dehumidified air in the dehumidifying rotor 11. Further, row 1 shows a dehumidifying device used for regeneration by combining the air used for purging with the air used for regeneration before the regeneration fan 31, and row 2 is used for purging. The dehumidifying device used for regeneration is shown after the air used for regeneration merges with the air used for regeneration after the regeneration fan 31, and row 3 shows after the air used for purging is used for regeneration. FIG. 4 shows a dehumidifying device that is not reused, and row 4 shows a dehumidifying device that is used for regeneration when the air used for purging merges with the air taken from outside. However, the dehumidifying apparatus and the dehumidifying apparatus control method according to the present invention may be applied to a dehumidifying apparatus having a processing flow not shown in FIG.

DESCRIPTION OF SYMBOLS 1 Drying dehumidifier 11 Dehumidification rotor 11a Dehumidification zone 11b Regeneration zone 11c Purge zone 12, 13 Section division cassette 42, 43, 44 Temperature sensor 23, 46 Anemometer

Claims (8)

A dehumidifying device having a dehumidifying unit for dehumidifying passing air,
To dehumidify the dehumidifying unit by allowing the air to be dehumidified to pass through and dehumidifying the dehumidifying unit so that the dew point is within a predetermined range, and allowing the temperature-controlled air to pass therethrough. Sorting means for dividing the regeneration zone into a purge zone for radiating heat of the dehumidifying unit by passing air;
An area changing means for repeatedly assigning the dehumidifying unit to the dehumidifying area, the regeneration area, and the purge area in order;
Introduced into the regeneration zone such that the outlet temperature at the position near the regeneration zone in the purge zone is higher than the outlet temperature at the location near the purge zone in the regeneration zone and is equal to or higher than the predetermined regeneration completion temperature. Regenerating air volume control means for controlling the regenerating air volume to be
The air to be dehumidified corresponding to the suitable regeneration air volume based on the correspondence relationship between the suitable regeneration air volume to be controlled by the regeneration air volume control means and the humidity of the air to be dehumidified prepared in advance. Estimated humidity acquisition means for acquiring the estimated humidity of
Preliminarily prepared operating conditions that are operating conditions that minimize the amount of heat required for regeneration of the dehumidifying unit while the dew point of the dehumidified air is within the predetermined range, and the humidity of the air to be dehumidified, Preferred operating condition acquisition means for acquiring the preferred operating condition corresponding to the estimated humidity acquired by the estimated humidity acquisition means based on preferred operating condition information indicating
And a dehumidifier controlled in accordance with the preferred operating conditions. The dehumidification unit is a dehumidification rotor that is repeatedly assigned in the order of the dehumidification zone, the regeneration zone, and the purge zone by rotating at a set number of revolutions per unit time.
In the dehumidifying device, the suitable operating condition acquisition means includes a suitable rotor speed at which the amount of heat required for regeneration of the dehumidifying rotor is minimized while the dew point of the dehumidified air is within the predetermined range, and the dehumidifying target Based on the preferred operating condition information indicating the relationship with the humidity of the air, to obtain the preferred rotor rotational speed corresponding to the estimated humidity,
The zone changing means repeatedly assigns the dehumidification rotor in the order of the dehumidification zone, the regeneration zone, and the purge zone by rotating the dehumidification rotor according to the acquired preferred rotor rotation speed.
The dehumidifying device according to claim 1. The purge air volume, which is the air volume of the air introduced into the purge zone, is controlled so as to change in proportion to the change in the rotor rotational speed.
The dehumidifying device according to claim 2. The suitable operating condition acquisition means is prepared in suitable operating condition information indicating a relationship between the suitable operating condition, the humidity of the air to be dehumidified, and the amount of dehumidified air that is the amount of air introduced into the dehumidifying area. Based on the estimated humidity acquired by the estimated humidity acquisition means and the preferred operating conditions corresponding to the amount of dehumidified air,
The dehumidification apparatus as described in any one of Claim 1 to 3. Differential pressure acquisition means for acquiring a differential pressure between the air before being introduced into the dehumidification zone and the air after passing through the dehumidification zone;
Based on the correspondence relationship between the differential pressure and the dehumidified air volume prepared in advance, an estimated dehumidified air volume of air introduced into the dehumidifying area corresponding to the differential pressure acquired by the differential pressure acquiring means is acquired. An estimated air volume acquisition means for performing,
The preferred operating condition acquisition means acquires the preferred operating condition corresponding to the estimated humidity acquired by the estimated humidity acquisition means and the estimated dehumidified air volume acquired by the estimated air volume acquisition means.
The dehumidifying device according to claim 4. The temperature of the air introduced into the regeneration zone is adjusted by a regeneration heater so that the regeneration temperature is set,
In the dehumidifying device, the suitable operating condition acquisition means includes a suitable regeneration temperature at which the amount of heat required for regeneration of the dehumidifying unit is minimized while the dew point of the dehumidified air is within the predetermined range, and the air to be dehumidified. Based on the preferred operating condition information indicating the relationship with the humidity of the, obtain the preferred regeneration temperature corresponding to the estimated humidity,
The regeneration heater adjusts the temperature of the air introduced into the regeneration zone so that the temperature of the air becomes the preferred regeneration temperature.
The dehumidification apparatus as described in any one of Claim 1 to 5. Based on the temperature of the purged air that has been mixed and made uniform after passing through the purge zone, the regeneration air volume control means determines that the outlet temperature at a position near the regeneration zone of the purge zone is that of the regeneration zone. Control the amount of regeneration air introduced into the regeneration zone so that the temperature is higher than the outlet temperature at the position near the purge zone and higher than a predetermined regeneration completion temperature.
The dehumidification apparatus as described in any one of Claim 1 to 6. The dehumidification rotor for dehumidifying the passing air passes through the air to be dehumidified to dehumidify, and the dehumidification area for keeping the dew point within a predetermined range and the temperature-controlled air are passed through the dehumidification rotor. Sorting means for classifying the dehumidification rotor into a regeneration area for regenerating the dehumidification capacity of the rotor and a purge area for radiating heat of the dehumidification rotor by passing air; and the dehumidification rotor per set unit time In a dehumidifying device comprising: a zone changing means that repeatedly assigns the dehumidifying zone, the regeneration zone, and the purge zone in order by rotating at a rotational speed,
Introduced into the regeneration zone such that the outlet temperature at the position near the regeneration zone in the purge zone is higher than the outlet temperature at the location near the purge zone in the regeneration zone and is equal to or higher than the predetermined regeneration completion temperature. A regeneration air volume control step for controlling the regeneration air volume to be performed;
Based on the correspondence relationship between the suitable regeneration air volume that is a control target in the regeneration air volume control step prepared in advance and the humidity of the air to be dehumidified, An estimated humidity obtaining step for obtaining an estimated humidity of the air;
Preliminary operating conditions that are operating conditions that minimize the amount of heat required for regeneration of the dehumidifying rotor while the dew point of the dehumidified air is within the predetermined range, and the humidity of the air to be dehumidified, Based on the preferred operating condition information indicating the relationship, the preferred operating condition obtaining step for obtaining the preferred operating condition corresponding to the estimated humidity obtained in the estimated humidity obtaining step,
A control step of controlling at least one of the rotational speed of the dehumidifying rotor and the temperature of the regenerated air in the dehumidifying device according to the preferred operating conditions;
A method for controlling the dehumidifying device.

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