JP2002320818A - Dehumidifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dehumidifier capable of preventing the excess temperature from rising at a switching of operation of the dehumidifier. SOLUTION: In the dehumidifier provided with a moisture adsorbing body for adsorbing the moisture in air, a heating means 13 for heating the gas for releasing the moisture adsorbed to the moisture adsorbing body and a blowing means 10 for supplying the air to the adsorbing body from the outside, a control means 3 for changing the air supply amount of the blowing means to the value on the second condition, after changing the operation condition set value of the heating means 13 from the value on the first condition to the value on the second condition, while keeping the air supply amount of the blowing means 10 at the value on the first condition for a specified time, when the operation condition of the dehumidifier is changed from the first condition to the second condition (when air supply amount is decreased), is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dehumidifier, and more particularly to a dehumidifier capable of preventing overheating inside the dehumidifier.

[0002]

2. Description of the Related Art Conventionally, a dry dehumidifier equipped with a rotary dehumidifier has been known. FIG. 14 is a schematic diagram showing a configuration of a conventional dry dehumidifier, and FIG. 15 is a control block diagram of the dry dehumidifier shown in FIG. A conventional dehumidifier will be described with reference to FIGS.

Referring to FIG. 14, a dehumidifier is a dehumidifier rotor 1.
15, a dehumidifying fan 110, a regeneration fan 112, a regeneration heater 113, and a condenser 118. Dehumidifying rotor 115
Is a honeycomb rotor in which a half-wave molded body is joined to a flat sheet, and a moisture absorbent is held on the surface and inside of the honeycomb rotor. As this moisture absorbent, for example, zeolite can be used.
Zeolites do not cause deliquescence and have a crystalline and stable pore structure. Therefore, the degree of deterioration of zeolite when water is adsorbed is small. Therefore, if zeolite is used as the hygroscopic agent, the hygroscopic effect can be exhibited stably for a long period of time.

In a dehumidifier, the dehumidifying rotor 115
The dehumidification target air 116 to be dehumidified is introduced from outside the dehumidifier, and the moisture in the air is adsorbed by the desiccant of the dehumidification rotor 115. Therefore, a dehumidifying fan 110 is provided to introduce outside air as dehumidified air 116 into the dehumidifier. When the dehumidifying fan 110 operates, air to be dehumidified 116 is introduced into the dehumidifier. At this time, first, a relatively large dust contained in the dehumidified air 116 is removed by the filter 117 installed in the dehumidifier.

Next, the air 116 to be dehumidified passes through a condenser 118. Here, as will be described later, warm and moist regenerated air is introduced into the condenser 118. For this reason, when the dehumidified air 116 passes through the condenser 118, the regenerated air introduced into the condenser 118 can be cooled. Condensed water 121 is separated from the regenerated air cooled in this way. Then, the dew condensation water 121 is guided from the inside of the condenser 118 to a water receiving tank 122 through a pipe.

The dehumidified air 116 that has passed through the condenser 118
Is guided to the dehumidification rotor 115. This dehumidifying rotor 11
At 5, the moisture contained in the dehumidified air 116 is adsorbed by the desiccant disposed in the dehumidification rotor 115. As a result, moisture is removed from the dehumidified air 116. The dehumidified air 116 from which the moisture has been removed as described above becomes dry air 119 downstream of the dehumidification rotor 115. This dry air 119 is guided to a heat recovery heat exchanger 120 arranged downstream of the dehumidification rotor 115.
The heat of the dry air 119 is recovered in the heat recovery heat exchanger 120. Thereafter, the dry air 119 is discharged from the inside of the dehumidifier to the outside.

[0007] In order to regenerate the desiccant of the dehumidifying rotor 115 which has adsorbed moisture, the regeneration heater 113 heats the regeneration air. Heating temperature is, for example, 200 ° C. or higher and 250 ° C.
It can be: The regenerating heater 113 is provided with the heat recovery heat exchanger 1 by operating the regenerating fan 112.
The regeneration air heated to some extent by 20 is supplied.
Then, the regeneration air further heated by the regeneration heater 113 moves in the direction of the white arrow in the figure as the regeneration fan 112 continues to operate. That is, the regeneration air heated by the regeneration heater 113 is supplied to the regeneration unit 127 of the dehumidification rotor 115 through the conduit as indicated by the white arrow in the drawing.

In the regeneration section 127 of the dehumidification rotor 115, the regeneration air heated by the regeneration heater 113 heats the desiccant of the dehumidification rotor 115. In this way, moisture is removed from the desiccant of the dehumidification rotor 115. As a result, the regenerated air becomes warm and moist air.

Then, the regeneration air is supplied from the regeneration section 127 of the dehumidification rotor 115 to the condenser 118. In the condenser 118, the regeneration air is cooled by the dehumidified air 16 as described above. Therefore, the condenser 118
In the inside, moisture is condensed from the regeneration air. As a result, dew condensation water 121 is generated inside the condenser 18.

Condensed water 121 guided to a water receiving tank 122
Is transported by a water pump 123 to a water storage tank 125 via a water pump tube 124. This water receiving tank 1
In 22, a water level detecting means for detecting a water level in the water receiving tank 122 is provided. And the water receiving tank 1
When the water level inside the tank 22 reaches a predetermined water level, the water in the water receiving tank 122 is discharged to the water storage tank 125 by operating the water pump 123 as described above.

The dehumidifying rotor 115 has a rotor motor 111.
(See FIG. 15). As the dehumidification rotor 115 rotates, the dehumidification rotor portion located in the dehumidification section 126 of the dehumidification rotor 115 through which the dehumidification air 116 passes rotates from the dehumidification section 126 to the regeneration section 127. Then, the regeneration air heated by the regeneration heater 113 is blown in the regeneration section 127 as described above. As a result, the moisture is removed from the desiccant to regenerate. Then, the dehumidifying rotor portion holding the regenerated dehumidifying agent moves to the dehumidifying section 126 by rotating again. As a result, the dehumidification rotor 115
The above-mentioned desiccant repeats adsorption and release (regeneration) of moisture, thereby enabling continuous dehumidification.

The regeneration air used to regenerate the desiccant of the dehumidification rotor 115 is supplied from the regeneration heater 113 to the condenser 118 via the regeneration section 127 of the dehumidification rotor 115.
Introduced to. And, as already mentioned, the condenser 1
After the water is removed at 18 (after being dried), it is introduced into a heat recovery heat exchanger 120 via a pipe. Dry air 11 that has passed through the dehumidifying section 126 of the dehumidifying rotor 115
9 flows through a heat recovery heat exchanger 120.

Here, the regeneration section 127 of the dehumidification rotor 115
, The regeneration air heated by the regeneration heater 113 is blown. As a result, the dehumidification rotor portion located at the regeneration section 127 is heated to some extent by the regeneration air. Further, when the heated dehumidification rotor portion reaches the dehumidification section 126, the temperature of the dehumidification rotor portion is in a state of being somewhat high. The dehumidifying rotor portion having such a high temperature is supplied to the dehumidified air 116.
Is passed through, so that the dehumidified dry air 119 is heated by the dehumidifying rotor 115 so that the dry air 11
The temperature of 9 rises. Then, the heat recovery heat exchanger 120
In this case, the heat of the dry air 119 having the increased temperature is transmitted to the regeneration air. By thus increasing the temperature of the regeneration air in advance, the power consumption of the regeneration heater 113 can be reduced. By operating the regenerating fan 112, the regenerated air is circulating in the pipeline constituting the closed circuit in the direction of the white arrow shown in FIG.

Referring to FIG. 15, the dehumidifier includes control means 101 for controlling the operation of the dehumidifier. The control means 101 includes an operation mode determination means 102 and a timer 104. The operation mode determination means 102 includes an operation switch 1
05, continuous dehumidification switch 106, automatic dehumidification switch 10
7 and the temperature sensor 108 are connected. As will be described later, the operation switch 105, the continuous dehumidification switch 106, the automatic dehumidification switch 107, and the temperature sensor 1
Operation mode determining means 1 based on the input signal from
02 determines the operation mode of the dehumidifier. The drive unit 109 is controlled based on the output data from the operation mode determination unit 102. The driving unit 109 drives the dehumidifying fan 110, the rotor motor 111, the reproducing fan 112, and the reproducing heater 113.

The operation switch 105, the continuous dehumidification switch 106 and the automatic dehumidification switch 107 shown in FIG.
Although not shown in FIG. 14, it is arranged on an operation panel installed on the main body of the dehumidifier. The operation of each device constituting the dehumidifier, such as the regeneration fan 112 and the dehumidification fan 110, is controlled by a control device serving as control means 101 built in the dehumidifier.

Here, the operation switch 105 is a switch for starting and stopping the dehumidifier. Also,
When the continuous dehumidification switch 106 is on, the so-called continuous dehumidification operation is performed in the dehumidifier. That is, if the continuous dehumidification switch 106 is selected after the operation switch 105 is pressed and the dehumidifier enters the operation state, the control means 101 causes the dehumidification fan 110, the rotor motor 111, The regeneration fan 112, the regeneration heater 113 and the like are continuously operated (so-called continuous operation state). As a result, regardless of the humidity in the room where the dehumidifier is installed,
Dehumidification operation is performed continuously.

When the automatic dehumidification switch 107 is selected, the control means 101 performs a so-called automatic operation in which the operation mode of the dehumidifier is automatically switched according to the humidity in the room where the dehumidifier is installed. In this automatic operation, the measured value of the indoor humidity data detected by the humidity sensor 108 is input to the operation mode determination means 102. The operation mode determination means 102 determines the operation mode of the dehumidifier by comparing the measured value of the humidity data from the humidity sensor 108 with a preset reference value of the humidity data. Then, the operation mode determining means 10
When the operation mode of the dehumidifier is determined in 2, the data is transmitted to the driving means 109. As a result, the driving means 109 sends the dehumidifying fan 110 and the rotor motor 11
1. Control signals are transmitted to respective devices such as the regenerating fan 112 and the regenerating heater 113, and these devices perform predetermined operations to change the operation mode of the dehumidifier.

In the automatic operation described above, for example, when the humidity outside the dehumidifier gradually decreases, the operation mode of the dehumidifier is switched to a mode corresponding to an atmosphere having a lower humidity.
In this case, by controlling the driving means 109 at a timing when the measured value of the humidity data detected by the humidity sensor 108 becomes lower than a predetermined reference value, the reproduction heater 1 is controlled.
At the same time as the power supplied to the fan 13 decreases.
12 and the amount of air blown by the dehumidifying fan 110 decrease.

When the operation switch 105 is pressed again,
When the stop state is selected, the dehumidifier stops the operation after performing a predetermined operation such as a so-called after-purge operation.

In the after-purge operation, as soon as the stop state is selected, a control signal is transmitted from the operation mode determining means 102 to the driving means 109 so as to perform a control for stopping the power supply to the regeneration heater 113. As a result, the supply of power to the regeneration heater 113 stops. Similarly, by controlling the driving means 109, the dehumidifying fan 1
10 is set to the minimum value. At this time, the rotor motor 111 and the like also continue to operate. on the other hand,
After the stop state is selected by the timer 104, when a predetermined time has elapsed after counting the time, the power of other devices such as the dehumidifying fan 110 and the rotor motor 111 is turned off.

[0021]

The above-described conventional dehumidifier has the following problems. That is, in the conventional dehumidifier, for example, in the automatic dehumidifying operation, when the operating conditions are changed to conditions suitable for a lower humidity atmosphere as described above, the dehumidifying fan 110, the regeneration heater 113, the regeneration fan 112, etc. Were switched almost simultaneously. Specifically, the amount of electric power supplied to the regeneration heater 113 decreases and the amount of air blown by the dehumidification fan 110 decreases so that the amount of heat generated by the regeneration heater 113 decreases.

However, referring to FIG.
When the amount of power supplied to the dehumidifying rotor 115 is switched to a smaller value,
The temperature of the regeneration air and the temperature of the dehumidifying rotor 115 existing up to the condenser 118 via 27 are relatively high in accordance with the conditions before the operating conditions of the dehumidifier are switched. On the other hand, the amount of air blown by the dehumidifying fan 110 is smaller than the value before switching according to the operating conditions after switching. For this reason, the amount of air of the dry air 119 discharged from the dehumidifier is also reduced, and as a result, the amount of heat discharged from the inside of the dehumidifier to the outside is reduced. As a result, a state occurs in which the regeneration air and the heat of the dehumidifying rotor 115 cannot be sufficiently discharged to the outside of the dehumidifier. The above contents will be described more specifically. FIGS. 16 to 18 are graphs showing the change over time of the dry air temperature when the calorific value and the air supply amount are simultaneously switched in the conventional dehumidifier. 16 to 18, the vertical axis represents the dry air temperature T, and the horizontal axis represents time t. Note that the heat generation amount and the air supply amount are switched at time point a.

The dry air temperature T at the time of stability before and after the switching of the operating conditions is set by setting the amount of heat generated by the regeneration heater 113 as the heating means and the dehumidifying fan 110 as the blowing means.
It changes depending on the setting of the air supply amount. For example,
FIG. 16 shows a case where the rate of decrease in the amount of supplied air is smaller than the rate of decrease in the amount of heat generated before and after the switching of the operating conditions. In this case, as shown in FIG. 16, the value of the dry air temperature T at the time of stability after the switching of the operating condition is lower than before the switching of the operating condition. FIG. 17 shows a case where the rate of decrease in the amount of supplied air is greater than the rate of decrease in the amount of heat generated before and after the switching of the operating conditions. In this case, as shown in FIG. 17, the value of the dry air temperature T at the time of stability after the switching of the operating conditions becomes higher than before the switching of the operating conditions. FIG. 18 shows a case where the rate of decrease in the amount of generated heat before and after the switching of the operating conditions is substantially equal to the rate of decrease in the amount of supplied air. In this case, as shown in FIG.
The value of the dry air temperature T at the time of stability after the switching of the operating conditions is substantially equal to the value at the time of stability before the switching of the operating conditions. And
In any of the cases shown in FIGS. 16 to 18, a state occurs in which the regeneration air and the heat of the dehumidifying rotor 115 cannot be sufficiently discharged to the outside of the dehumidifier as described above. Rise. For this reason,
The temperature inside the dehumidifier rises excessively.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a dehumidifier capable of preventing an excessive rise in temperature at the time of switching operation of the dehumidifier. It is to provide.

[0025]

A dehumidifier according to the present invention comprises: a moisture absorbent for adsorbing moisture in the air; a heating means for heating a gas for releasing moisture adsorbed on the moisture absorbent;
A blower for supplying air from outside to the moisture absorber, wherein the operating condition of the dehumidifier is changed from the first condition to the second condition.
When changing to the condition, the operating condition set value of the heating means is changed to the first value.
After changing from the value under the condition to the value under the second condition, the supply amount of air by the blowing means is maintained at the value under the first condition for a predetermined time, and then the supply amount of air by the blowing means is changed to the second value. Control means for changing to a value in the condition is provided.

Here, the operating condition of the dehumidifier is relatively high from the condition of relatively high dehumidifying capacity, that is, the condition of the large amount of heat generation and the large supply of air (the first condition). It is assumed that the condition is changed to a condition in which the amount of heat generation is small and the amount of supplied air is small (second condition).
In this case, the heating means changes the operating condition set value in accordance with the dehumidifying capacity (for example, the amount of heat generated by the heating means is reduced so as to match the dehumidifying capacity). However, immediately after such switching of the operating conditions, the heat or gas of the dehumidifying rotor heated by the heating means under the first condition (the operating condition before switching) still remains inside the dehumidifier. . Therefore, when the air supply amount is changed by the air blowing means at the same time as the switching of the heating means as in the related art, the heat of the dehumidifying rotor and the gas inside the dehumidifier heated under the first condition is sufficiently transmitted to the outside of the dehumidifier. It was difficult to discharge. However, according to the present invention, after switching the operating condition set value of the heating means,
Since the amount of air supplied by the blower is maintained at a value corresponding to the first condition for a predetermined time, sufficient air can be supplied to the inside of the dehumidifier immediately after switching the operating condition of the heater. Therefore, the heat remaining inside the dehumidifier when the operating conditions of the dehumidifier are switched can be reliably discharged to the outside of the dehumidifier by the air supplied by the blowing means. For this reason, when the operating conditions of the dehumidifier are switched, it is possible to prevent the temperature inside the dehumidifier from rising excessively.

[0027] The dehumidifier according to the present invention preferably further comprises a temperature measuring means for measuring the temperature of air discharged to the outside of the dehumidifier after being supplied to the hygroscopic body. The control means determines the time from the time when the operating condition set value of the heating means is changed to the time when the air supply amount in the blowing means is changed, based on the measured value of the temperature of the air measured by the temperature measuring means. It is preferable to include a determining means for determining the value.

Here, the temperature of the air discharged to the outside of the dehumidifier reflects the temperature inside the dehumidifier. Therefore, it is possible to determine whether or not the internal temperature of the dehumidifier is excessively increased based on the measured value of the temperature of the air measured by the temperature measuring means. Therefore, based on the measured value of the temperature of the air measured by the temperature measuring means, so that the heat inside the dehumidifier is sufficiently released to the outside of the dehumidifier by the air supplied into the dehumidifier by the blowing means, It is possible to determine a time (air supply amount maintaining time) from a point in time when the operation condition set value of the heating unit is changed to a point in time when the air supply amount in the air blowing unit is changed.

In the dehumidifier according to the present invention, the determining means comprises:
It is preferable to include means for selecting a time point at which the measured value of the temperature of the air measured by the temperature measuring means becomes substantially equal to the reference value of the air temperature as a time point at which the amount of air supplied by the blowing means is changed.

Here, as described above, the case where the operating condition of the dehumidifier is changed from a condition having a relatively high dehumidifying capacity (first condition) to a condition having a relatively low dehumidifying capacity (second condition). Think. At this time, a reference value as a point in time when the air supply amount by the blowing means is changed is selected as follows. As described above, the dry air temperature at the time of stability before and after the operation switching changes depending on the setting of the calorific value of the heating means and the air supply amount of the blowing means under each operating condition. FIG. 13 shows that the dehumidifier is operated under the first condition, and at the time point b, the heat value by the heating means is changed to the heat value corresponding to the second operation condition.
FIG. 6 is a graph showing a change over time in dry air temperature when the amount of air blown by the air blowing means is set to the amount of air blown corresponding to the first operating condition. As described above, the dry air temperature Ts in a stable state realized by the heat generation amount corresponding to the second operation condition and the air flow amount corresponding to the first operation condition may be set as the reference value.
Then, as described above, by comparing the measured value of the temperature with the reference value, a simple method of detecting the time when the measured value becomes substantially equal to the reference value is used, and the time at which the air supply amount is changed by the blowing means is changed. Can be determined.

In the dehumidifier according to the present invention, the value corresponding to the second condition in the operating condition set value of the heating means is preferably smaller than the value corresponding to the first condition, and It is preferable that the value corresponding to the second condition is smaller than the value corresponding to the first condition.

In such a case, the temperature of the dehumidifier may be excessively increased particularly when the operating conditions are switched, so that the effect of applying the present invention is great.

[0033]

Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, the same or corresponding portions have the same reference characters allotted, and description thereof will not be repeated.

(First Embodiment) FIG. 1 is a control block diagram showing a first embodiment of a dehumidifier according to the present invention. FIG.
Embodiment 1 of the dehumidifier according to the present invention will be described with reference to FIG.

Referring to FIG. 1, the dehumidifier includes control means 1 for controlling the operation of the dehumidifier. Control means 1
Includes an operation mode determining means 2, an air volume setting changing means 3, and a timer 4. An operation switch 5, a continuous dehumidification switch 6, an automatic dehumidification switch 7, and a humidity sensor 8 are connected to the operation mode determination means 2. As described later, based on the input signals from the operation switch 5, the continuous dehumidification switch 6, the automatic dehumidification switch 7, and the humidity sensor 8,
The operation mode determining means 2 determines the operation mode of the dehumidifier. The air volume setting change unit 3 controls the drive unit 9 based on the output data from the operation mode determination unit 2. The data from the operation mode determining means 2 is also transmitted directly to the driving means 9. In the control means 1, a timer 4 for notifying the air volume setting change means 3 of a predetermined timing is provided as shown in a control method described later. The drive unit 9 drives the dehumidifying fan 10, the rotor motor 11, the regeneration fan 12, and the regeneration heater 13.

FIG. 2 is a schematic diagram showing a configuration example of the first embodiment of the dehumidifier according to the present invention shown in FIG. An example of the configuration of the dehumidifier shown in FIG. 1 will be described with reference to FIG.

Referring to FIG. 2, the dehumidifier is a dehumidifier rotor 15.
, A dehumidifying fan 10 as a blowing means, and a regeneration fan 1
2, a regeneration heater 13 as a heating means, and a condenser 18
And The dehumidifying rotor 15 is composed of a honeycomb rotor in which a single-wave molded body is joined to a flat sheet, and a hygroscopic agent as a hygroscopic body held on the surface or inside of the honeycomb rotor. For example, zeolite can be used as the hygroscopic agent. Zeolites do not cause deliquescence and have a crystalline and stable pore structure. For this reason, the degree of deterioration of the zeolite when moisture is adsorbed is small, and the zeolite can exhibit a moisture absorbing action stably for a long period of time.

In the dehumidifier, dehumidified air 16 to be dehumidified is introduced into the dehumidifier rotor 15 from outside the dehumidifier, and the moisture in the dehumidified air 16 is adsorbed by the desiccant of the dehumidifier rotor 15. Therefore, in order to introduce outside air as dehumidified air 16 into the interior of the dehumidifier, the dehumidifying fan 10
Is installed. When the dehumidifying fan 10 operates, the air 16 to be dehumidified is introduced into the dehumidifier. This dehumidified air 16 first passes through a filter 17 installed in the dehumidifier. As a result, relatively large-sized dust contained in the dehumidified air 16 is removed.

Next, the dehumidified air 16 passes through the condenser 18. Here, as described later, warm and moist regeneration air is introduced into the condenser 18. For this reason, when the dehumidified air 16 passes through the condenser 18, the regenerated air disposed inside the condenser 18 can be cooled. Condensed water 21 is separated from the regenerated air thus cooled. Condensation water 21 from inside the condenser 18
Are accumulated in the water receiving tank 22 through the pipe.

The air 16 to be dehumidified that has passed through the condenser 18 is guided to the dehumidification rotor 15. In the dehumidifying rotor 15, the moisture contained in the air 16 to be dehumidified is adsorbed by the desiccant held by the dehumidifying rotor 15. As a result, moisture is removed from the dehumidified air 16. The dehumidified air 16 from which the moisture has been removed as described above becomes dry air 19 on the downstream side of the dehumidification rotor 15. Dry air 19
Is guided to a heat recovery heat exchanger 20 arranged downstream of the dehumidification rotor 15. The heat of the dry air 19 is recovered by the heat recovery heat exchanger 20 (the heat is transmitted from the dry air 19 to the regeneration air). Thereafter, the dry air 19 is discharged from the inside of the dehumidifier to the outside.

The regeneration heater 13 heats regeneration air used for regenerating the desiccant of the dehumidifying rotor 15 which has absorbed moisture. The regeneration air is supplied to the regeneration heater 13 and the dehumidification rotor 1
5 through a pipe connecting the regeneration unit 27, the condenser 18, the heat recovery heat exchanger 20 and the regeneration fan 12. The heating temperature of the regeneration air with the regeneration air 13 can be, for example, 200 ° C. or more and 250 ° C. or less. After the regeneration air is heated to such a temperature, the regeneration fan 12 operates to move the regeneration air in the pipeline in the direction of the white arrow in the figure. That is, the regeneration air heated by the regeneration heater 13 is supplied to the regeneration unit 27 of the dehumidification rotor 15 through the pipeline. By the regeneration air heated by the regeneration heater 13, the desiccant rotor 15 is heated in the regeneration section 27 of the dehumidification rotor 15. In this way, moisture is removed from the desiccant. As a result, the regenerated air becomes warm and moist air.

Then, the regeneration air is supplied from the regeneration section 27 of the dehumidification rotor 15 to the condenser 18 through the pipe. In the condenser 18, as described above, the dehumidified air 1
As the regeneration air is cooled by 6, the moisture in the regeneration air is dewed. As a result, dew water 21 is generated inside the condenser 18.

The condensed water 21 guided from the condenser 18 to the water receiving tank 22 is supplied to a pumping tube 24 by a pumping pump 23.
Through the water storage tank 25. The water receiving tank 22 is provided with a water level detecting means (not shown) for detecting the water level in the water receiving tank. As the water level detecting means, for example, a float switch can be used. Then, when the water level detecting means detects that the water level inside the water receiving tank 22 has reached the predetermined water level, the water in the water receiving tank 22 is discharged to the water storage tank 25 by operating the water pump 23.

The regeneration air used to regenerate the desiccant held by the dehumidification rotor 15 is supplied to the dehumidification rotor 1.
5 is led to the condenser 18 from the regeneration unit 27. Then, the regenerated air is introduced into the heat recovery heat exchanger 20 via a pipe after the moisture is removed (after being dried) in the condenser 18. The heat recovery heat exchanger 20 includes a dehumidifying rotor 15.
The dry air that has passed through the dehumidifying section 26 is blown.

Here, the regeneration section 27 of the dehumidification rotor 15 is blown with regeneration air heated by the regeneration heater 13. As a result, the dehumidification rotor portion located at the regeneration section 27 of the dehumidification rotor 15 is in a heated state. Even when the heated dehumidification rotor portion reaches the dehumidification section 26, the temperature of the dehumidification rotor portion is in a somewhat high state. Since the dehumidified air 16 passes through the dehumidification rotor portion having such a high temperature, the dehumidified dry air 19 is heated by the dehumidification rotor, and the temperature is rising.

In the heat recovery heat exchanger 20, the heat of the dried air 19 whose temperature has thus increased is transmitted to the regeneration air. By increasing the temperature of the regeneration air in the heat recovery heat exchanger 20 in advance, the power consumption of the regeneration heater 13 (the power used to raise the temperature of the regeneration air to a predetermined temperature) can be reduced.

The dehumidification rotor 15 is rotatable by a rotor motor 11 (see FIG. 1) as a drive motor, as indicated by black arrows in FIG. Dehumidification rotor 1 through which dehumidification air 16 passes by rotation of dehumidification rotor 15
The dehumidification rotor portion located in the dehumidification section 26 of FIG. 5 rotates from the dehumidification section 26 and gradually moves to the regeneration section 27. By blowing the regeneration air heated by the regeneration heater 13 in the regeneration section 27 as described above, moisture is removed from the desiccant of the dehumidification rotor 15 (the dehumidifier has sufficient moisture absorption capacity. Will be prepared). Then, the dehumidifying rotor portion holding the dehumidifying agent whose moisture has been removed and has regained the hygroscopic ability (regenerated),
In addition, it moves to the dehumidifying section 26 by rotating.
As a result, the desiccant on the dehumidifying rotor 15 repeats the adsorption and regeneration of moisture, thereby enabling continuous dehumidification.

The operation switch 5, the continuous dehumidification switch 6, and the automatic dehumidification switch 7 shown in FIG. 1 are arranged on an operation panel, not shown in FIG. 2, but installed in the main body of the dehumidifier. Also, the reproduction fan 1 shown in FIG.
2. Each device constituting the dehumidifier such as the dehumidifying fan 10 is controlled by a control device as control means 1 built in the dehumidifier.

Here, the operation switch 5 is a switch for starting and stopping the dehumidifier. When the continuous dehumidification switch 6 is turned on, a so-called continuous dehumidification operation is performed in the dehumidifier. That is,
When the continuous dehumidification switch 6 is selected after the operation switch 5 is pressed and the dehumidifier enters the operation state, the control unit 1 causes the dehumidification fan 10, the rotor motor 11, and the regeneration fan to be operated regardless of the signal from the humidity sensor 8. 12. Continuously operate the regeneration heater 13 and the like (so-called continuous dehumidification operation state). As a result, the dehumidifier continuously performs the dehumidification operation regardless of the humidity in the room where the dehumidifier is installed.

When the automatic dehumidifying switch 7 is selected, the control means 1 automatically switches the operation mode of the dehumidifier in accordance with the humidity in the room where the dehumidifier is installed.
A so-called automatic dehumidifying operation is performed. In the automatic dehumidifying operation, the indoor humidity information detected by the humidity sensor 8 is transmitted to the operation mode determining means 2. The operation mode determining means 2 determines the operation mode of the dehumidifier by comparing the humidity information transmitted from the humidity sensor 8 with a preset reference value of humidity. When the operation mode of the dehumidifier is determined by the operation mode determination means 2, a predetermined signal is transmitted from the operation mode determination means 2 to the air volume setting change means 3 and the drive means 9. As a result,
A control signal is transmitted from the driving means 9 to respective devices such as the dehumidifying fan 10, the rotor motor 11, the regeneration fan 12, and the regeneration heater 13. Then, when these devices perform a predetermined operation, each device of the dehumidifier operates so as to correspond to the determined operation mode.

When the stop state is selected by pressing the operation switch 5 again, the dehumidifier performs a predetermined operation such as an after-purge operation described later and then stops the operation.

Hereinafter, the operation of the dehumidifier according to the present invention shown in FIGS. 1 and 2 will be described in more detail.

(1) Operation of Dehumidifier when Switching from Continuous Dehumidification Operation Mode to After-Purge Operation After the operation switch 5 of the dehumidifier is pressed and the dehumidifier is started, if the continuous dehumidification switch 6 is selected, The operation mode of the dehumidifier becomes the continuous dehumidification operation mode. In the continuous dehumidifying operation mode, the dehumidifying operation is continuously performed regardless of the humidity (humidity information detected by the humidity sensor 8) in the room where the dehumidifier is installed. In the continuous dehumidifying operation mode, the regeneration heater output is set to the output W3, and the air volume of the dehumidifying fan is set to the air volume Q3. In the continuous dehumidifying operation mode, the output of the regeneration heater and the air volume of the dehumidifying fan are both maintained at the above-mentioned constant values until the operation of the dehumidifier is stopped.

FIG. 3 is a graph showing the change over time of the output of the regeneration heater when the dehumidifier shown in FIGS. 1 and 2 is switched from the continuous dehumidifying operation mode to the after-purge operation. FIG. 4 is a graph showing the time change of the air volume of the dehumidifying fan when the continuous dehumidifying operation mode is switched to the after-purge operation.

Referring to FIGS. 3 and 4, let us consider a case where the operation switch 5 is pressed at the time point A and an instruction to stop the operation of the dehumidifier is issued. In this case, when a signal indicating that the operation switch 5 has been pressed is transmitted to the operation mode determination means 2,
A signal is transmitted to the air volume setting change means 3 so that the operation mode of the dehumidifier is switched from the continuous dehumidification operation mode to the after-purge operation as preprocessing for stopping the operation of the dehumidifier in the operation mode determination means 2. Further, a similar signal is transmitted from the operation mode determining means 2 to the driving means 9.
The driving means 9 receiving the signal indicating that the operation mode is switched from the continuous dehumidifying operation mode to the after-purge operation is performed.
Power supply to the power supply is stopped. As a result, as shown in FIG. 3, at the time point A, the output of the regeneration heater 13 becomes 0 from the output W3.
Changes to

On the other hand, for the dehumidifying fan 10, the following control is performed. That is, when a signal to switch to the after-purge operation is transmitted from the operation mode determining means 2, the timer 4 of the control means 1 changes the air flow of the dehumidifying fan 10 from the time A to the air flow Q3 in the continuous dehumidifying operation mode. The time tb for maintaining the state as it is and the time ta from the time A to the time when the operation of the dehumidifier is completely stopped with the air volume of the dehumidifying fan set to 0 are counted. Even after the time point A, the air volume of the dehumidifying fan 10 is maintained at the value before the time point A. At time B when time tb has elapsed from time A,
Information indicating that the time B has come is transmitted from the timer 4 to the air volume setting change means 3. Then, a predetermined control signal is transmitted from the air volume setting change unit 3 to the drive unit 9,
At the time point B, the air volume of the dehumidifying fan 10 is changed from the air volume Q3 to the air volume Q1 corresponding to the after-purge operation.

As described above, after the output which is the operating condition set value of the regenerative heater 13 as the heating means is switched from the output W3 to 0, the air supply amount by the dehumidifying fan 10 as the blowing means for a predetermined time tb. Is maintained at the value before the time point A (that is, the value corresponding to the first condition). Therefore, immediately after the operating condition of the regeneration heater 13 is switched, sufficient air can be supplied to the inside of the dehumidifier by the dehumidification fan 10. Therefore, the heat remaining inside the dehumidifier when the operating conditions of the dehumidifier are switched can be reliably discharged to the outside of the dehumidifier by the air supplied by the dehumidifying fan 10. Therefore, when the operating condition of the dehumidifier is switched from the continuous dehumidification operation mode to the after-purge operation, it is possible to prevent the temperature inside the dehumidifier from excessively increasing.

Thereafter, in the dehumidifying fan 10, the air volume Q1 is maintained until the time point C when the after-purge operation ends. Then, when information indicating that the time ta has elapsed from the time point A is transmitted from the timer 4 to the air volume setting changing unit 3, the air volume of the dehumidifying fan 10 is changed from the air volume Q1 to 0 from the air volume setting changing unit 3 to the driving unit 9. The signal is transmitted so as to change As a result, at the time point C, the operation of the dehumidifying fan 10 stops.

Here, the times tb and ta vary depending on the configuration of the dehumidifier, the operating conditions of the dehumidifier, and the like. The times tb and ta are selected so that the internal temperature of the dehumidifier can be maintained at the same time. Such time t
a and tb can be obtained experimentally.

Under the operating conditions described with reference to FIGS. 3 and 4, from time A to time B, the dehumidifying fan 10
After maintaining the air volume at the air volume Q3, from time B to time C, the air volume of the dehumidifying fan 10 was changed to the air volume in the after-purge operation called the air volume Q1. However, in the dehumidifier according to the present invention, the length of the time tb may be the same as the time ta, that is, the air volume of the dehumidifying fan 10 may be maintained at the air volume Q3 until the time point C when the after-purge operation ends. .

(2) In the case of the automatic dehumidifying operation mode After the dehumidifier is started by pressing the operation switch 5 of the dehumidifier and the automatic dehumidifying switch 7 is selected, the operation mode determining means 2 sets the automatic dehumidifying operation mode. Is selected. In the automatic dehumidifying operation mode, the operating state of the dehumidifier is changed by comparing the measured value (humidity data) of the humidity from the humidity sensor 8 with a predetermined set value of the humidity. The comparison between the humidity data from the humidity sensor 8 and the set value of the humidity is performed based on, for example, the concept shown in FIG. FIG. 5 is a schematic diagram illustrating a relationship between a set value of humidity (set humidity) and an operation condition (operation mode) in the automatic dehumidification operation mode.

When the value of the humidity data from the humidity sensor 8 is equal to or higher than the set humidity RH1, the operation mode of the dehumidifier is determined to be the automatic dehumidification "high" mode. When the value of the humidity data from the humidity sensor 8 is smaller than the set humidity RH1 and equal to or larger than the set humidity RH2, the operation mode of the dehumidifier is determined to be the automatic dehumidification “medium” mode. The humidity data from the humidity sensor 8 indicates the set humidity R
When the humidity is smaller than H2 and equal to or higher than the set humidity RH3, the operation mode of the dehumidifier is determined to be "weak" for automatic dehumidification. When the indoor humidity data from the humidity sensor 8 is smaller than the set humidity RH3, the operation mode of the dehumidifier is determined to be automatic dehumidification “OFF”.

The regeneration heater in each operation mode,
Table 1 shows output conditions of the dehumidifying fan, the rotor motor, the regeneration fan, and the like.

[0064]

[Table 1]

Table 2 shows the set air volume corresponding to the output condition of the dehumidifying fan in Table 1.

[0066]

[Table 2]

Table 3 shows the output (set W number) of the regeneration heater corresponding to the output condition of the regeneration heater in Table 1.

[0068]

[Table 3]

In the automatic dehumidifying operation mode as described above, the humidity in the room where the dehumidifier is installed gradually decreases, and the operation mode of the dehumidifier changes from "high" to "medium" for automatic dehumidification.
6 and 7 show the operation of the dehumidifier when switching to "weak".
This will be described with reference to FIG. FIG. 6 is a graph showing the time change of the output of the regeneration heater when the operation mode changes in the automatic dehumidification operation mode. FIG. 7 shows the change in the air volume of the dehumidification fan when the operation mode changes in the automatic dehumidification operation mode. It is a graph which shows a time change. 6 and 7 show the output of the regeneration heater and the airflow of the dehumidifying fan at the same timing, respectively.

First, consider a case where the indoor humidity is higher than the set humidity RH1 (see FIG. 5). When the dehumidifier is set to the automatic dehumidification operation mode, the dehumidifier is operated in an automatic dehumidification "strong" mode, which is an operation mode suitable for indoor humidity. At this time, the output W of the regeneration heater
Is the output W3 as shown in FIG. 6, and the air volume Q of the dehumidifying fan is the air volume Q3 as shown in FIG. Then, by continuing the operation of the dehumidifier, the indoor humidity gradually decreases.

It is assumed that the room humidity becomes lower than the set humidity RH1 at the time point D while the operation of the dehumidifier is continued as described above. At this time, since the humidity data detected by the humidity sensor 8 is lower than the set humidity RH1, the operation mode determination means 2 changes the operation mode from the automatic dehumidification “strong” to the automatic dehumidification “medium”. As a result, as described above, a predetermined signal is transmitted from the operation mode determining means 2 to the air volume setting changing means 3 and the driving means 9, and as shown in FIG. The output W3 drops to the output W2. At this time, the air volume of the dehumidifying fan 10 is maintained at the air volume Q3 as shown in FIG. Further, the timer 4 of the control means 1 starts counting a time tb from the time point D, which is a time for maintaining the air volume of the dehumidifying fan 10 at the air volume Q3 which is the air volume of the automatic dehumidification "strong".

At time point E after time point tb from time point D, the air volume setting change means 3 receives the signal from timer 4 indicating that time tb has elapsed, and controls dehumidifying fan 10 via drive means 9. As a result, the air volume Q of the dehumidifying fan 10 is changed from the air volume Q3 to the air volume Q2 at the time point E.
To fall. After time point E, the operation of the dehumidifier is continued under the automatic dehumidification “medium” operation condition. By continuing the operation of the dehumidifier in this way, the humidity in the room where the dehumidifier is installed further decreases.

As described above, at the time point D, the regeneration heater 1
3 is reduced from the output W3 to the output W2, the time t
By maintaining the air volume of the dehumidifying fan 10 at the air volume Q3 by b, it is possible to prevent the temperature inside the dehumidifier from excessively rising, as in the case of switching from the continuous dehumidifying operation mode to the after-purge operation described above. .

Next, at the time point F, when the indoor humidity detected by the humidity sensor 8 becomes lower than the set humidity RH2, the operation mode of the dehumidifier is automatically changed by the operation mode determination means 2 in the same manner as described above. Change from "Medium" to "Weak" automatic dehumidification. Then, a predetermined signal is transmitted from the operation mode determining means 2 to the air volume setting changing means 3 and the driving means 9. As a result, at the time point F, the regeneration heater 1
The power supplied to 3 decreases. For this reason, as shown in FIG.
To the output W1. On the other hand, the air volume of the dehumidifying fan 10 is maintained at the air volume Q2.

At this time point F, the timer 4 of the control means 1 starts counting the time tb. Then, at the time point G when the time tb has elapsed from the time point F, the air volume setting change unit 3 that has received the signal indicating that the time tb has elapsed from the timer 4 transmits a predetermined signal to the driving unit 9.
As a result, at the time point G, the driving unit 9 that has received the signal
Controls the dehumidifying fan 10, and the air volume Q of the dehumidifying fan 10 decreases from the air volume Q2 to the air volume Q1. After time point G, the operation of the dehumidifier is continued under the automatic dehumidification "weak" operation condition.

As described above, even when the operating condition of the dehumidifier is switched from "medium" to "weak", the output of the regeneration heater 13 is switched from the output W2 to the output W1 for a predetermined time. Dehumidifying fan 1 for time tb
By maintaining the air volume of 0 as the air volume Q2, it is possible to prevent the temperature inside the dehumidifier from excessively rising as in the case where the operating condition of the dehumidifier is switched from "strong" to "medium". it can.

(3) When switching from the automatic dehumidifying operation mode to the after-purge operation When switching from the automatic dehumidifying operation mode to the after-purge operation, the output of the regeneration heater 13 and the air volume of the dehumidifying fan 10 are in the continuous dehumidifying operation mode. Only the operation different from the above is performed, and the same operation as the operation described in the above (1) is performed. In this case, the same effect as the effect of the present invention described in the above (1) can be obtained.

In the dehumidifier described above, the regeneration heater 13
After the output is changed, the time tb for maintaining the air volume of the dehumidifying fan 10 in the state before the switching of the operation mode is such that the temperature inside the dehumidifier does not rise more than necessary with the switching of the operation mode. Determined by time. The time tb can be determined by, for example, experimentally measuring the temperature inside the dehumidifier while changing the temperature at the time tb and measuring the temperature inside the dehumidifier. Further, it is preferable that the time tb is also changed depending on the temperature of the area where the dehumidifier is installed, the output of the regeneration heater 13, the air volume of the dehumidifying fan 10, and the like.

For example, when the temperature in the room where the dehumidifier is installed is 0 ° C. or more and 35 ° C. or less, and the output of the regeneration heater 13 is 385
W to 575 W, air volume Q3 of the dehumidifying fan is 1.71
not less than m ³ / min and not more than 2.1 m ³ / min, air volume Q2 is 1.14 m
³ / min or more 1.47m ³ / min or less, the air volume Q1 is 0.73m
When the time is set to be not less than ³ / min and not more than 1.09 m ³ / min, the time tb is preferably not less than 40 seconds.

(Embodiment 2) FIG. 8 is a block diagram showing a configuration of Embodiment 2 of a dehumidifier according to the present invention. Second Embodiment A dehumidifier according to a second embodiment of the present invention will be described with reference to FIG.

Referring to FIG. 8, the dehumidifier basically has the same structure as that of the first embodiment of the dehumidifier according to the present invention.
However, the dehumidifier shown in FIG. 8 is provided with an exhaust sensor 14 for detecting the temperature of the dry air 19 discharged from the dehumidifier. The temperature data of the dry air 19 (measured value of the temperature of the dry air 19) detected by the exhaust sensor 14 is transmitted to the air volume setting change unit 3 of the control unit 1. In the dehumidifier shown in FIG. 8, the air volume Q of the dehumidifying fan is controlled using the temperature data from the exhaust sensor 14 as described later.

(1) Switching from the continuous dehumidifying operation mode to the after-purge operation FIG. 9 shows the time of the dry air temperature T when the dehumidifier shown in FIG. 8 switches from the continuous dehumidifying mode to the after-purge operation. It is a graph which shows a change. FIG. 10 is a graph showing a time change of the air volume Q of the dehumidifying fan 10 when the dehumidifier shown in FIG. 8 is switched from the continuous dehumidifying operation mode to the after-purge operation. The operation of the dehumidifier when switching from the continuous dehumidification operation mode to the after-purge operation will be described with reference to FIGS.

First, Embodiment 1 of the dehumidifier according to the present invention
As in the case of switching from the continuous dehumidifying operation mode to the after-purge operation in
3. The operation is performed with the air volume Q of the dehumidifying fan as the air volume Q3. The temperature T of the dry air 19 at this time is the temperature T13.

At time H, the operation switch 5
Is pressed, and an instruction to stop the operation is transmitted to the operation mode determination means 2, and the power supply to the regenerative heater 13 is stopped at the time H as in the case of switching the operation state in the first embodiment of the present invention. I do. As a result, the output W of the regeneration heater decreases at the time point H. On the other hand, the timer 4 in the control means 1 determines the time t during which the after-purge operation is continued from time H.
Start counting a. Further, even after the time point H, the air volume Q of the dehumidifying fan is maintained at the air volume Q3. As a result, as shown in FIG. The temperature T of the dry air is detected by an exhaust sensor 14 as a temperature measuring means.

As shown in FIG. 9, the temperature T of the dry air 19
At time I when the temperature of the dry air 19 has dropped to the temperature T0, a signal indicating that the temperature of the dry air 19 has dropped to the temperature T0 is transmitted from the exhaust sensor 14 to the air volume setting change means 3. In the air volume setting change means 3, the time point I is selected as the timing for switching the air volume of the dehumidifying fan 10. Then, a predetermined control signal is transmitted from the air volume setting changing unit 3 as the determining unit to the driving unit 9. As a result, the dehumidifying fan 10 is controlled by the driving means 9 to reduce the air volume at the dehumidifying fan 10 to the air volume Q.
From 3 to the air volume Q1. Here, the reference temperature of the dry air for changing the air volume of the dehumidifying fan 10 is:
It is set as shown in Table 4. Table 5 shows the stable drying air temperature in each operation mode.

[0086]

[Table 4]

[0087]

[Table 5]

In this manner, when the operating condition of the dehumidifier is switched from the continuous dehumidifying operation mode to the after-purge operation, it is possible to prevent the temperature inside the dehumidifier from excessively rising as in the first embodiment.

The temperature of the dry air 19 discharged to the outside of the dehumidifier reflects the temperature inside the dehumidifier. Therefore, it is possible to determine whether the internal temperature of the dehumidifier is excessively high based on the air temperature data measured by the exhaust sensor 14 as the temperature measuring means. Therefore, based on the temperature data of the air measured by the exhaust sensor 14, the heat inside the dehumidifier is sufficiently discharged to the outside of the dehumidifier by the air supplied to the inside of the dehumidifier by the dehumidifier fan 10. The time from H to time I can be determined. As a result, an excessive increase in the temperature inside the dehumidifier can be reliably prevented by a simple method of comparing the value of the temperature T of the dry air 19 with the reference temperature T0.

Thereafter, the after-purge mode ends at the time point J when the time ta has elapsed from the time point H. For this reason,
At a time point J, a control signal for stopping the operation of the dehumidifying fan 10 is transmitted from the air volume setting changing unit 3 to the driving unit 9. As a result, at time point J, the dehumidifying fan 10 stops. Thus, the operation of the dehumidifier stops.

(2) In the case of the automatic dehumidifying operation mode FIG. 11 shows that when the dehumidifier shown in FIG. 8 is operated in the automatic dehumidifying operation mode, the operation mode is changed from “strong” to “medium” to “weak”. FIG. 12 is a graph showing the change over time of the dry air temperature when the dry air temperature after switching and operation switching is lower than before the operation switching, and FIG. 12 shows the dehumidifier shown in FIG. 8 in the automatic dehumidifying operation mode. When driving, dehumidification operation "strong" →
It is a graph which shows the time change of the air volume of a dehumidification fan when an operation mode is switched from "medium" to "weak". The operation of the dehumidifier in the automatic dehumidification operation mode will be described with reference to FIGS.

The change of the operation mode shown in FIGS. 11 and 12 is basically the same as the change of the operation mode shown in FIGS. 6 and 7. However, in the case described with reference to FIGS. 6 and 7, after the output of the regeneration heater 13 is switched, this is the time during which the dehumidifying fan 10 maintains the air volume corresponding to the operation state before the output of the regeneration heater 13 is switched. The time tb was a predetermined value. However, FIG.
As shown in FIGS. 12 and 13, the time tb is determined based on the temperature of the dry air 19 in the dehumidifier shown in FIG.

That is, in the dehumidifier shown in FIG. 8, for example, the dehumidifying operation is changed from the “strong” mode to the “medium”
When the operating condition is switched to the mode, first, at time K, the output of the regeneration heater is switched from the output W3 to the output W2 (see FIG. 6). On the other hand, the air volume of the dehumidifying fan is air volume Q3.
Will be maintained. The exhaust sensor 14 measures the temperature of the dry air 19. Then, the controller 1 compares the temperature of the dry air 19 measured by the exhaust sensor 14 with a reference temperature. Dry air 1 reaches temperature T3, which is a reference temperature for switching the air volume of dehumidifying fan 10 to air volume Q2, which is the set air volume corresponding to the "medium" mode of dehumidifying operation of dehumidifying fan.
At the time point L when the temperature of No. 9 decreases, the air volume of the dehumidifying fan is switched from the air volume Q3 to the air volume Q2. Specifically, the temperature data from the exhaust sensor 14 is transmitted to the air volume setting change unit 3. By comparing the temperature data transmitted from the exhaust sensor with the set temperature in the air volume setting changing means 3, the temperature T of the dry air 19 is the reference temperature.
3 is determined. When the temperature of the dry air 19 decreases to the temperature T3, a control signal is transmitted from the air volume setting changing unit 3 to the driving unit 9 so as to change the air volume of the dehumidifying fan 10 from the air volume Q3 to the air volume Q2. . As a result, at time point L, the air volume of the dehumidifying fan is changed from air volume Q3 to Q2 as shown in FIG.

In this manner, when the operating condition of the dehumidifier is switched from the dehumidifying operation “strong” to the “dehumidifying operation” “medium”, the continuous dehumidifying operation mode in the second embodiment of the present invention is switched to the after-purge operation. In this case, the same effect as that obtained in the case can be obtained.

Thereafter, as the dehumidifier continues to operate in the dehumidifying operation “medium” mode, the indoor humidity further decreases. Then, at a time point M when the indoor humidity reaches the humidity RH2, the first embodiment of the present invention is performed.
Similarly, the output of the regeneration heater is changed from the output W2 to W1. On the other hand, the air volume of the dehumidifying fan remains at the air volume Q2. After the time point M, the temperature of the dry air gradually decreases as shown in FIG.

After that, at time N when the temperature of the dry air detected by the exhaust sensor 14 matches the temperature T1 which is the reference temperature for changing the air volume of the dehumidifying fan to the air volume Q1, the air volume setting changing means 3 to the driving means 9 The control signal is transmitted to change the air volume of the dehumidifying fan 10 from the air volume Q2 to the air volume Q1. As a result, at time N, the air volume of the dehumidifying fan 10 is changed from Q2 to the air volume Q1.
In this way, the switching of the operation state from the dehumidifying operation “medium” mode to the dehumidifying operation “weak” mode is completed. Time point N
After that, the operation of the dehumidifier is continued in the dehumidifying operation “weak” mode.

In this way, when the operating condition of the dehumidifier is switched from "medium" dehumidifying operation to "weak" dehumidifying operation, the continuous dehumidifying operation mode in the second embodiment of the present invention is switched to the after-purge operation. In this case, the same effect as that obtained in the case can be obtained. Further, even when the temperature of the dry air after the operation switching is higher than before the operation switching or when it does not change, an excessive temperature rise can be prevented.

(3) When the mode is switched from the automatic dehumidifying operation mode to the after-purge operation In this case, the operation of automatic dehumidification “strong”, “medium” and “weak” is performed by the same steps as those shown in FIGS. The mode can be switched to the after-purge operation. However, in this case, the output of the regeneration heater 13 and the air volume of the dehumidifying fan 10 before switching are different from the output and the air volume shown in FIGS. 9 and 10, but the other operating conditions are basically the same as those in FIGS. The same conditions as those described in can be used. As a result, when the operating conditions of the dehumidifier are switched from the automatic dehumidifying operation mode to the after-purge operation, the same effects as obtained when switching from the continuous dehumidifying operation mode to the after-purge operation in the second embodiment of the present invention are obtained. The effect can be obtained.

The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[0100]

As described above, according to the present invention, when the operation of the dehumidifier is switched, if the amount of air supplied from the outside is reduced, the operation condition setting value of the heating means is switched first. By maintaining the supply amount of air by the blowing means for a certain period of time at a value before the switching of the operating conditions, overheating inside the dehumidifier can be prevented. As a result, failure of the dehumidifier due to overheating can be prevented.

[Brief description of the drawings]

FIG. 1 is a control block diagram showing Embodiment 1 of a dehumidifier according to the present invention.

FIG. 2 is a schematic diagram illustrating a configuration example of a first embodiment of the dehumidifier according to the present invention illustrated in FIG. 1;

FIG. 3 is a graph showing a change over time of an output of a regeneration heater when the continuous dehumidifying operation mode is switched to an after-purge operation in the dehumidifier shown in FIGS. 1 and 2;

FIG. 4 is a graph showing a change over time of the air volume of a dehumidifying fan when switching from a continuous dehumidifying operation mode to an after-purge operation.

FIG. 5 is a schematic diagram showing a relationship between a set value of humidity (set humidity) and an operation condition (operation mode) in the automatic dehumidification operation mode.

FIG. 6 is a graph showing a time change of the output of the regeneration heater when the operation mode changes in the automatic dehumidification operation mode.

FIG. 7 is a graph showing a time change of the air volume of the dehumidifying fan when the operation mode changes in the automatic dehumidification operation mode.

FIG. 8 is a block diagram illustrating a configuration of a dehumidifier according to a second embodiment of the present invention.

9 is a graph showing a change over time of the temperature of dry air when switching from the continuous dehumidification mode to the after-purge operation in the dehumidifier shown in FIG.

FIG. 10 is a graph showing a time change of the air volume of a dehumidifying fan when switching from the continuous dehumidifying operation mode to the after-purge operation in the dehumidifier shown in FIG.

FIG. 11 is a diagram illustrating the operation of the dehumidifier shown in FIG. 8 in the automatic dehumidification operation mode, in which the operation mode is switched from “strong” to “medium” to “weak”, and the dry air temperature after the operation is switched. Fig. 6 is a graph showing a change over time of the dry air temperature in a case where the temperature becomes lower than before operation switching.

FIG. 12 shows a time change of the air volume of the dehumidifying fan when the operation mode is switched from “strong” to “medium” to “weak” when the dehumidifier shown in FIG. 8 is operated in the automatic dehumidifying operation mode. It is a graph shown.

FIG. 13 operates the dehumidifier under the first condition, and changes the amount of heat generated by the heating means to the amount of heat corresponding to the second operation condition at time point b, while changing the amount of air blown by the blowing means to the first operating condition. 7 is a graph showing a time change of a dry air temperature when an air blowing amount corresponding to FIG.

FIG. 14 is a schematic diagram showing a configuration of a conventional dry dehumidifier.

FIG. 15 is a control block diagram of the dry dehumidifier shown in FIG.

FIG. 16 is a graph showing a change over time of a dry air temperature when a heat generation amount and an air supply amount are simultaneously switched in a conventional dehumidifier.

FIG. 17 is a graph showing the change over time of the dry air temperature when the calorific value and the air supply amount are simultaneously switched in the conventional dehumidifier.

FIG. 18 is a graph showing a change over time of a dry air temperature when a heating value and an air supply amount are simultaneously switched in a conventional dehumidifier.

[Explanation of symbols]

1 control means, 2 operation mode determination means, 3 air volume setting change means, 4 timer, 5 operation switch, 6 continuous dehumidification switch, 7 automatic dehumidification switch, 8 humidity sensor,
Reference Signs List 9 driving means, 10 dehumidifying fan, 11 rotor motor, 12 regeneration fan, 13 regeneration heater, 14 exhaust sensor, 15 dehumidification rotor, 16 dehumidified air, 17
Filter, 18 condenser, 19 dry air, 20 heat exchanger for heat recovery, 21 dew condensation water, 22 water receiving tank, 23
Pump, 24 pumping tube, 25 water storage tank, 26 dehumidifying unit, 27 regenerating unit.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Haruhito Miyazaki 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka F-term (reference) 4D052 AA08 CB01 DA06 DB01 GA01 GA03 GB01 GB02 GB08

Claims (4)

[Claims] 1. A moisture absorber for adsorbing moisture in air, heating means for heating a gas for releasing moisture adsorbed on the moisture absorber, and blowing means for supplying air from outside to the moisture absorber. A dehumidifier comprising: when changing the operating condition of the dehumidifier from the first condition to the second condition, changing the operating condition set value of the heating means from the value corresponding to the first condition to the second condition. After changing to a value corresponding to the condition, the supply amount of air by the blower is maintained at a value corresponding to the first condition for a predetermined time, and then the supply amount of air by the blower is changed to the second supply amount. A dehumidifier comprising control means for changing a value to a value corresponding to a condition. 2. The apparatus according to claim 1, further comprising a temperature measuring unit configured to measure a temperature of the air discharged to the outside of the dehumidifier after being supplied to the hygroscopic body, wherein the control unit sets an operating condition set value of the heating unit. Determining means for determining a time from a time when the air supply amount is changed by the air blowing means to a time when the air supply amount is changed based on a measured value of the temperature of the air measured by the temperature measuring means. The dehumidifier according to claim 1. 3. The method according to claim 1, wherein the determining unit determines a point in time at which the measured value of the temperature of the air measured by the temperature measuring unit becomes substantially equal to a reference value of the temperature of the air when the amount of air supplied by the blowing unit is changed. 3. The dehumidifier according to claim 2, further comprising means for selecting the time point to be changed. 4. A value corresponding to the second condition in the operating condition set value of the heating means is smaller than a value corresponding to the first condition, and the second value in the air supply amount by the blowing means is set. The dehumidifier according to any one of claims 1 to 3, wherein a value corresponding to the condition is smaller than a value corresponding to the first condition.