JP2835570B2 - Automatic moisture proof device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-proof storage, and more particularly to an automatic moisture-proof device capable of preventing excessive drying.

[0002]

2. Description of the Related Art For example, foods, pharmaceuticals, cameras, and the like that generate mold, rust, deteriorate, or deteriorate in characteristics due to moisture absorption must always be stored and stored in a low humidity atmosphere. For this reason, a moisture-proof storage is conventionally used, and the above-mentioned foods, medicines, and the like that dislike moisture are stored therein.

FIG. 3 shows a conventional moisture-proof storage, 1 is a body,
Reference numeral 2 denotes a glass door, and reference numerals 3 and 4 denote a humidity controller and an automatic drying device provided in the body 1, respectively.

The humidity controller 3 comprises a nylon film which expands and contracts in accordance with, for example, a change in humidity, and a micro switch which is turned on and off by the nylon film.

The automatic drying device 4 is, for example,
No. 2414, Japanese Utility Model Publication No. 1-31212, Japanese Utility Model Publication No. 5-33913, and the like.

FIGS. 4 and 5 show a conventional automatic drying apparatus 4 using a shape memory alloy, 5 is a unit case, 6 is a shutter outside the cabinet for opening and closing an opening communicating with the inside of the unit case 5 to the outside of the moisture-proof cabinet, Reference numeral 7 denotes an internal shutter that opens and closes an opening communicating the interior of the unit case 5 with the moisture-proof storage, 8 a timer, 9 a desiccant container disposed in the unit case 5, 10 a desiccant heater, and 11 a hinge. , 12 is a lever for connecting the outside shutter 6 and the inside shutter 7 via the hinge 11, 13 is a shape memory alloy coil which is elongated by heating, 14 is a coil spring,
Reference numeral 15 denotes a heater for the shape memory alloy coil 13.

FIG. 6 shows an electric circuit diagram of a conventional moisture-proof device incorporating the above-mentioned automatic drying device 4, wherein 16 is an operating power source, T is a normally open contact which is closed only within a time determined by a timer 8, C Is a normally closed contact that is opened when the humidity controller 3 detects humidity lower than the set humidity.

As is apparent from this electric circuit diagram, when the humidity inside the moisture-proof storage is lower than the set humidity, the normally closed contact C is opened and the power supply to the timer 8 is cut off.

[0009] In the moisture-proof storage, the humidity in the storage is set humidity,
For example, while the temperature is higher than 30%, the automatic drying device 4 is always energized from the power supply 16, and the timer 8 closes the normally open contact T for every 30 minutes, for example, every 30 minutes. As a result, the heating element 10 is energized to heat the desiccant in the desiccant container 9 to about 100 to 120 ° C.

[0010] By this heating, the desiccant releases the adsorbed moisture as vapor and is regenerated.

On the other hand, the heating element 15 is also energized, and when the shape memory alloy coil 13 is heated by the heating element 15 and its temperature exceeds the transformation point (operating point), the shape memory alloy coil 13 is extended and the lever 12 is moved. Shutter 7 inside
Is closed, the shutter outside the refrigerator 6 opens, and the moisture evaporated from the desiccant that has started heating and regeneration is discharged to the outside of the moisture-proof storage via the shutter outside the refrigerator 6.

After the lapse of the predetermined time set by the timer 8, the energization of the heating members 10 and 15 is stopped, and when the temperature of the shape memory alloy coil 13 falls below the transformation point, the shape memory alloy coil 13 To the state of. As a result, the internal shutter 7 opens via the lever 12 by the action of the coil spring 14, the external shutter 6 closes, and the desiccant which has also stopped heating and regeneration starts to absorb moisture, for example, 5 hours and 30 minutes thereafter. If the humidity in the refrigerator is not lower than the above 30%, the normally open contact T of the timer 8 is closed again, the energization of the heaters 10 and 15 is started, and the heating and regeneration mode of the desiccant is set. It is.

[0013]

However, as described above, in the conventional moisture-proof storage, even if the humidity in the moisture-proof storage becomes lower than the set value while the automatic drying device 4 is performing the dehumidification, the inside of the storage is not changed. Since the shutter is kept open and dehumidification is continued, the inside of the refrigerator may be over-dehumidified.

This tendency is particularly remarkable when the outside air humidity is low as in winter.

If the humidity in the moisture-proof storage becomes too low in this way, the moisture-proof material is rather dried too much, which may adversely affect the properties.

For this reason, when the humidity inside the moisture-proof storage becomes equal to or less than the set humidity, the automatic drier is covered with a cover, and is isolated from the moisture-proof room to prevent excessive dehumidification. As disclosed in the official gazette, Japanese Unexamined Utility Model Publication No. Hei 3-7926 requires a cover, a shape memory alloy coil for its operation, a heating element thereof, and the like. , Becomes complicated,
There are drawbacks such as low operation reliability.

Further, in the above-mentioned conventional automatic drying apparatus, when the heating and regeneration mode of the desiccant is finished and the energization of the heating elements 10 and 15 is stopped and the mode is shifted to the dehumidification mode, the shape memory alloy coil 13 is quickly transformed to the transformation point. When the temperature falls below, the shutter 6 outside the refrigerator is closed and the shutter 7 inside the refrigerator is opened. At this time, the temperature of the desiccant does not decrease so much, and the release of steam is often continued. There was a drawback that the humidity inside increased.

The present invention has been made to eliminate the above disadvantages.

[0019]

[0020]

Means for Solving the Problems] automatic moisture apparatus of the present invention, the humidity controller for detecting the humidity in the moisture proof storage, proof
More become the automatic drying apparatus is disposed humidity-compartment, the automatic drying apparatus includes a unit case, in the unit case
The formed outside opening communicating with the outside of the moisture-proof storage
An opening inside the cabinet, which communicates with the moisture-proof cabinet,
External shutters for opening and closing the external and internal openings
And in the unit case
Dehumidifying regeneration means comprising a desiccant container and a heated body thereof,
Shape memory alloy coil placed in the above unit case
Opening and closing of the inside and outside shutters of the above-mentioned warehouse consisting of
Means and the opening / closing means are connected to other parts in the unit case.
Partition means for thermal isolation from the
The humidity controller operates in the dehumidifying mode of the automatic drying device.
Timer to determine playback mode drive timing
And the above-described protection inserted in series with the power supply circuit of the timer.
Open when the humidity inside the humidifier becomes lower than the specified humidity.
Normally-closed contacts that block current flow to
The above moisture proof inserted in series with the power supply circuit of the coil heating body
When the inside of the refrigerator becomes lower than the predetermined humidity, it closes and
And turn on the power to close the internal shutter of the automatic drying unit.
To the normally open contact that opens the outside shutter and the timer
Therefore, it closes only within the specified time,
The normally open contacts connected to the row and the heating
And a normally open contact inserted in series with the source circuit .

[0021]

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIG. 1, in addition to the normally closed contact C which opens when the humidity controller 3 detects a humidity lower than the set humidity, when the humidity controller 3 detects a humidity lower than the set humidity, as shown in FIG. A normally open contact C 'for closing is provided,
The normally open contact C ′ is connected in parallel to the normally open contact T of the timer 8 connected in series to the heating element 15 of the shape memory alloy coil 13. Also, as shown in FIG.
Space 5 having a desiccant container 9 and its heating element 10.
And a shape memory alloy coil 13 and its heating body 15
The space is partitioned by a partition wall 17.

Since the automatic moisture proof device of the present invention has the above-described configuration, when the humidity in the refrigerator falls to a set humidity, for example, 30% or less, the normally closed contact C of the humidity controller 3 is opened.
At the same time , the energization of the timer 8 is stopped, the normally open contact C 'is closed at the same time, the energization of the heating element 15 is started regardless of the operation of the timer 8, the shape memory alloy coil 13 is extended, and the external shutter 6 Is opened and the internal shutter 7 is closed, so that excessive dehumidification in the moisture-proof storage can be prevented. During this period, energization of the timer 8 is blocked.
The normally open contact T will not be closed
There is no mode. In addition, the humidity in the refrigerator
If recovered, the humidity controller 3 detects the recovery of the humidity.
The normally open contact C 'is immediately opened, and the normally closed contact C is closed.
You. Therefore, energization of the heating element 15 is prevented, and
Close the shutter 6 and open the shutter 7 in the refrigerator,
The dehumidification inside is started. In addition, the operation of timer 8 also starts
After a lapse of a predetermined time, the normally open contact T of the timer 8 is closed.
Then, power supply to the heating elements 10 and 15 is started, and the regeneration mode is started.
Mode is started.

In the automatic moisture proof device of the present invention,
As described above, the shutter 7 closes immediately when the humidity reaches, for example, 30% or less due to the operation of the humidity controller 3.
The possibility of recovery to 0% is considered.

In this case, the humidity controller 3 detects the recovery of the humidity and immediately opens the normally open contact C ', closes the normally closed contact C, and heats and regenerates the drying agent required before the start of dehumidification. The mode is started, but in the case where the humidity of the outside air is low, the humidity in the moisture-proof storage immediately drops to 30% or less again in many cases.

In such a case, there is a possibility that a so-called flapping phenomenon may occur in which the opening and closing of the contacts of the humidity controller 3 are continuously repeated.

However, actually, the micro switch of the humidity controller 3 has a hysteresis phenomenon,
For example, when the humidity becomes 30% or less, the micro switch of the humidity controller 3 is operated, the normally closed contact C is opened, and after the normally open contact C 'is closed, the humidity controller 3 is turned on until the humidity returns to, for example, 35%. Micro switch does not work,
Until that time, the normally closed contact C is closed and the normally open contact C 'is not opened.

Therefore, the desired object can be sufficiently achieved without causing the above-mentioned flapping phenomenon.

[0030]

According to the present invention , the space having the shape memory alloy coil 13 and its heating element 15 is a substantially closed space, and the temperature of the shape memory alloy coil 13 is maintained even after the heating by the heating element 15 is stopped. Does not drop below the transformation point within 10 minutes, so that when switching from the desiccant heating / regeneration mode to the dehumidification mode,
After the temperature drops from 0 ° C. to 120 ° C. to about 60 ° C. and the evaporation of water from the desiccant stops, the external shutter 6 is closed and the internal shutter 7 is opened.

[0032]

As described above, according to the automatic moisture-proof device of the present invention, there is a great advantage that the overdrying of the moisture-proof storage can be prevented with a very simple structure and the dehumidifying effect can be surely obtained. .

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram of the automatic moisture-proof device of the present invention.

FIG. 2 is a vertical sectional front view of the automatic drying device of the present invention.

FIG. 3 is an explanatory diagram of a moisture-proof storage.

FIG. 4 is a vertical sectional front view of a conventional automatic drying device.

FIG. 5 is a side view of a conventional automatic drying device.

FIG. 6 is an electric circuit diagram of a conventional moisture-proof device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Glass door 3 Humidity controller 4 Automatic drying device 5 Unit case 6 External shutter 7 Internal shutter 8 Timer 9 Desiccant container 10 Desiccant heating body 11 Hinge 12 Lever 13 Shape memory alloy coil 14 Coil spring 15 Heating body 16 Operating power supply 17 Partition wall T Normally open contact C Normally closed contact C 'Normally open contact

Claims (1)

(57) [Claims] 1. A become more and humidity controller for detecting the humidity in the moisture proof storage, an automatic drying device disposed within moisture proof storage, the automatic drying apparatus includes a unit case, it is formed in the unit case, moisture proof storage Warehouse communicating outside
An outer opening and a chamber formed in the unit case and communicating with the moisture-proof chamber.
An inner opening, and an outer shutter and a shutter for opening and closing the outer opening and the inner opening.
And in the unit case
Dehumidifying / regenerating means comprising a desiccant container and a heating element thereof, and a shape memory alloy coil disposed in the unit case
Opening and closing of the inside and outside shutters of the above-mentioned warehouse consisting of
Means and the opening / closing means from other parts in the unit case.
The humidity controller is provided with a dehumidifying mode of the automatic drying device.
Timer for determining the playback mode drive timing
And the moisture-proof storage interposed in series with the power supply circuit of the timer.
Open when the inside of the inside becomes lower than the specified humidity, and
And a normally closed contact for preventing current flow, and a power supply circuit for heating the shape memory alloy coil.
Closed when the humidity inside the moisture-proof storage becomes lower than the specified humidity.
Power to the heating element, and
Normally open contact that closes the inner shutter and opens the outer shutter
And close only within the time determined by the timer above,
The normally open contact connected in parallel with the normally open contact and the desiccant
An automatic moisture proof device comprising: a normally open contact inserted in series with a power supply circuit of a heater of the vessel .