JP3224663B2 - Drying equipment for closed cabinets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed cabinet drying apparatus capable of storing cameras, electronic parts, chemicals, works of art and the like in a normal temperature and low humidity atmosphere.

[0002]

2. Description of the Related Art Various types of drying apparatuses having a dehumidifying means, a heating and regenerating means and an electric control means have been proposed in the prior art. JP-A-57-175991 (known examples).

That is, in the above-mentioned known example, an automatic drying unit, a timer, a humidity controller and the like are vertically arranged and mounted in a cabinet.
The dehumidification of air in the cabinet is automatically performed by the drying mechanism in the drying unit by dehumidifying the humidity in the cabinet in a state adjusted by the humidity controller and promoting the convection of the air using the heat radiation from the timer. It is possible to do.

[0004]

However, the above-mentioned known examples have the following disadvantages.

(1) Decrease in storage capacity of cabinet As described above, since the automatic drying unit, the timer, the humidity controller and the like are all provided in the cabinet, the allowable storage space in the cabinet is limited, and the storage capacity of the cabinet is reduced. The decline was inevitable.

(2) Temperature rise in cabinet Further, as a result of the temperature rise in the cabinet little by little due to heat radiation from the timer, thermal damage to stored photographs, films, artworks, etc. occurs. There was fear.

[0007] A first object of the present invention is to convert air into a desiccant.
Effectively contact and dehumidify the inside of the cabinet.
An object of the present invention is to provide an object which can be effectively reproduced .

A second object of the present invention is to provide a reproduction processing
An object of the present invention is to provide a material which can be heat-treated without unevenness .

A third object of the present invention is to provide a shape memory alloy wire.
The shutter driven by the transformation is smoothly operated
To provide what we can do.

[0010]

In order to achieve the above object,
The structural features of the present invention are as follows.

(1) Dehumidifying air in a closed room with a desiccant
Then, the drying agent is heated to enable drying and drying treatment.
Drying unit in a closed cabinet with a drying unit
Wherein the desiccant is formed of a honeycomb shaped body,
The vertical through hole of the molded body is intermittently set by a timer.
A heating element that can be energized is directly inserted in a non-contact state,
Coiled seesaw-shaped shutter transformed by heating
A coil-shaped shape memory alloy wire that can be driven against a spring is
A drying device for a closed cabinet which is made to pass through another vertical through-hole of a molded body in a non-contact state .

Therefore, in either case of dehumidification or regeneration,
Air can effectively contact the desiccant.

[0013] In addition, during the regeneration process, drying is performed uniformly by heating.
And the shutter operates without any problems.
Is what is done.

[0014]

[Action] Regarding the operation of the present invention as described above,
It is as follows.

That is, when the air in the cabinet is dehumidified, the seesaw shutter is driven so that the drying chamber of the drying unit communicates only with the inside of the cabinet, and a part of the heat generated by the time limit means is received and dried. By heating the room and generating an updraft, natural convection is promoted and the air in the cabinet is efficiently dehumidified. When the desiccant is regenerated, the desiccant is heated by heating means to drain water And at the same time, transform the shape memory alloy wire using the residual heat,
The seesaw shutter is opened and closed by the driving force at the time of the transformation, the drying chamber is communicated only with the outside of the cabinet, and the moisture discharged from the desiccant is discharged outside the cabinet.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. As shown in the drawing, an IC including a drying unit 11 of a drying apparatus 1, an electric resistor and other electronic parts is shown.
Timer 12 and humidity controller 13 have front door 2
1. Back plate 2 of a closed cabinet 2 that can be opened and closed by 1.
2, a camera, an electronic component, or a storage item G such as a chemical product or an art object placed on a support shelf 23 in the cabinet 2 in a stable low humidity atmosphere for a long period of time. It is configured to be able to be stored.

The drying unit 11 of the drying device 1
The configuration shown in FIG. 1 is such that the front wall 100a of the protective case 100 is fitted into the mounting hole 22a formed in the back plate 22 of the cabinet 2 so as to partially protrude. The drying unit 11 is connected to the cabinet 2
It was equipped with.

Further, regarding the internal structure of the drying unit 11, a drying processing chamber 102 and upper and lower ventilation control chambers 103 and 104 formed by a partition 101 are formed. Rear wall 100
b, upper and lower vents 105-108 and
The drying processing chamber 102 and the upper and lower ventilation control chambers 103 and 104 are configured to be able to communicate with the inside and outside of the cabinet 2 by upper and lower transparent windows 109 to 112 opened in the partition wall 101, respectively.

Further, a pair of seesaw shutters 113 and 114 are rotatably mounted on support shafts 115 and 116 in the upper and lower ventilation control chambers 103 and 104 partitioned by the partition 101. The seesaw shutter 11
3, 114, the see-through windows 109 to 112 opened in the partition 101 can be opened and closed alternately.
Will be described below.

Next, a hexagonal hole 1 formed by molding a dry raw material as shown in FIGS.
A honeycomb-shaped desiccant 120 in which a plurality of hexagonal holes 21 are arranged is provided.
The heating wire 122 is inserted into the inside, the coil-shaped shape memory alloy wire 123 is passed through another arbitrary hexagonal hole 121b, and the upper and lower ends of the shape memory alloy wire 123 are interposed wires 124. Are connected to one end of each of the seesaw shutters 113 and 114 in a stretched manner, while the other ends of the seesaw shutters 113 and 114 are
A coil spring 131 is stretched between the stopper 130 and the protection case 100 to make the both seesaw shutters 113 and 114 movable in an interlocking manner. During the period other than the period in which the desiccant 120 is heated and regenerated by causing heat to be generated, the shape memory alloy wire 123 is in a contracted state, and the seesaw shutters 113 and 114 are arranged at the solid line positions in FIG. And the heating element 1
When the shape memory alloy wire 123 is heated by the residual heat thereof, the shape memory alloy wire 123 is thermally transformed and expanded, and the two shutters 113,
114 is configured to be displaced to the virtual line position.

The side bulging portion 1 of the protective case 100
00e, the IC timer 12 is provided near the desiccant 120 so as to be able to control the energization of the heating element 122, and in front of the protection case 100 facing the cabinet 2. A humidity controller 13 capable of setting a humidity control value in the cabinet 2 in a dial format is mounted on the wall 100a.

The honeycomb-shaped desiccant 120 is obtained by forming a hygroscopic powder material such as silica gel or zeolite (trade name) into a multi-tubular shape by pressure molding.

Next, the operation of this embodiment will be described.

[Drying Step] In this step, as described above, since the shape memory alloy wire 123 is contracted, each of the seesaw shutters 113 and 114 is disposed at a solid line position. Top and bottom windows 1 of partition 101
09 and 111 are open while the other upper and lower windows 11 are open.
0 and 112 are closed, and the upper end of the upper seesaw shutter 113 is in contact with the top wall 100c of the protective case 100. The lower end of the lower seesaw shutter 114 is
Since it is in contact with the bottom wall 100d, there is no possibility that the air inside the cabinet 2 will be circulated outside the cabinet 2.

In this state, for example, when storing a storage item (G) such as an electronic component such as a camera or a semiconductor chip, the storage unit (G) is placed on the supporting shelf 23 in the cabinet 2 and the humidity controller 13 is moved. The IC timer 12 is turned on by adjusting the humidity manually so that the humidity in the cabinet 2 is maintained within a range of about 40% to 50%.

When the door 21 is closed in this state, the interior of the cabinet 2 becomes hermetically closed, and in the drying chamber 102, the air in the hexagonal holes 131 is sequentially dehumidified to reduce the weight, and is raised by the chimney effect. In addition, since the IC timer 12 is turned on as described above, part of the heat generated by the built-in voltage dropping electric resistor or the like heats the air in the drying processing chamber 102 when the power is supplied from the power supply P. (Arrow C), the dehumidified air is more efficiently transmitted to the upper window 109, since an ascending airflow is induced by the high temperature.
The air flows into the cabinet 2 through the upper ventilation hole 105 (arrow A), and the air in the cabinet 2 having the same volume flows through the lower ventilation hole 107 and the lower transparent window 111 in a natural convection instead. 102 (arrow B), and sequentially into the hexagonal holes 12
1, the inside of the cabinet 2 is maintained at a preset humidity of about 40% to 50%.
The storage item G is to be safely stored in a low humidity state.

In this step, the IC timer 1
Needless to say, the remaining heat of No. 2 is radiated from the outer periphery to the outside of the cabinet 2 (arrow D).

[Step of Regenerating Desiccant] The desiccant 120 gradually decreases its ability to absorb moisture due to the above-described dehumidifying process.
Power is supplied from the power source (P) to the heating element 122 in the hexagonal hole 121a to generate heat, and the desiccant 120 is heated to release the adsorbed moisture, thereby performing a regeneration process. Shape memory alloy wire 1 inserted in
23 is heated by receiving the residual heat, is rapidly transformed and expanded, and is urged by the tension of the coil spring 131 so that the upper shutter 113 is rotated counterclockwise around the support shaft 116, and the lower seesaw shape. Shutter 114 is spindle 1
16 are pivoted clockwise with the fulcrum 16 as a fulcrum (see FIG. 1). Both are displaced to the positions indicated by phantom lines, while the upper and lower windows 110 and 112 are opened, and the desiccant 1
The high-temperature air including the moisture released from the air outlet 20 is released from the upper ventilation hole 106 to the outside of the cabinet 2 by utilizing the rising airflow (arrow A '), and at the same time, from the lower ventilation hole 108 to the outside of the cabinet 2. Fresh air is taken into the drying chamber 102 (arrow B '), and the drying agent 120 is sequentially regenerated.

When the regenerating process of the desiccant 120 is completed, the power supply to the heating element 122 is stopped by the IC timer 12, the temperature of the heating element 122 becomes low, and the temperature and humidity of the shape memory alloy wire 123 are reduced. Then, the shutters 113 and 114 are returned to the solid line positions again, and stand by for the dehumidification process in the cabinet 2.

Table 1 and Table 2 show the results of the performance test of the actual product (S unit) of the drying apparatus 1 according to this embodiment.

[0031]

[Table 1]

[0032]

[Table 2]

The above tables will be described as follows.

A performance curve showing a change in humidity in the refrigerator when there is no heating effect between devices due to heat generation of a normal timed device or the like is shown by a line B.

In Table 1, the vertical axis indicates the cabinet humidity and the horizontal axis indicates time. It is apparent from this figure that the B characteristic is almost stable, with the initial internal humidity being about 80%, 34% after 6 hours, 28% after 12 hours, and 25% after 24 hours with the passage of time.

The ambient conditions outside the cabinet were 25
The temperature and the humidity were 80%.

On the other hand, the moisture absorption effect is promoted by the convection promoting action of the peripheral portion of the desiccant due to the heating of the drying device by the heating portion of the timed device according to this embodiment, and the performance curve is shown as A under the same ambient conditions. From initial 80%, 22% after 6 hours, 16% after 12 hours, 14 after 24 hours
%, And the ability to reduce the humidity in the refrigerator was almost doubled (more than two ordinary drying units) (Table 2).

As is clear from the test performance data, the remarkable characteristics are clearly proved, and it is clear that the performance of the drying apparatus is reduced and the performance of the humidity reducing ability is more remarkable than the conventional machine. is there.

The mounting of the humidity controller 13 may be omitted in the case of a simple type drying apparatus, but the mounting position may be other than the front wall 100a of the protective case 100. Needless to say, it can be mounted on other wall surfaces.

Needless to say, a polygonal hole, a circular hole, an elliptical hole, or any other desired shape can be provided in place of the hexagonal hole 121 of the desiccant 120.

[0041]

The remarkable effects of the present invention described above are as follows.

(1) Drying Composed of Honeycomb Formed Body
Since the through-holes of the agent are arranged in a vertical shape,
The air supplied from the cabinet is dehumidified while passing through the through-hole.
To reduce weight, and in the regeneration cycle,
By heating when passing, any cycle
Even if there is, it becomes an updraft and smoothly convects through the through hole smoothly
However, since the through-holes are honeycomb-shaped,
In a relatively narrow air passage, so-called chimney effect allows more air
It can be propelled and requires forced means such as fans
Vent smoothly through the desiccant without dehumidification or re-
Ru can increase the raw efficiency.

(2) Heating body to the desiccant through hole
And the heating element is desiccant
Local heating to prevent differences in heat distribution
In addition, the desiccant can be heat-treated uniformly. Also, shape
The shape memory alloy wire is mechanically resistant to desiccant during its transformation.
There is no contact,
The shutter can be opened and closed without hindrance.
Ri, it is possible to Siu shall in the long term continuous use.

(3) The heating element and the coil-shaped shape memory alloy wire
Since it was penetrated through another through hole of the desiccant,
Heating becomes indirect through the intermediary of a desiccant,
Sudden temperature change at rising or falling
Shock is reduced, and shutter operation is not affected.
This makes it possible to prevent the occurrence of a failure without reason.

(4) Improvement of moisture absorption and drainage capacity of the desiccant Since the desiccant is formed in a hollow shape, the air permeability is good, and the ability to adsorb moisture in the air is excellent.
Also, during the heating and regeneration, the efficiency of discharging adsorbed moisture can be greatly improved.

(5) Reduction in size and weight of the drying device Since the hollow drying agent having excellent efficiency as described above is employed, the amount of the drying agent can be significantly reduced, and as a result, the drying device itself can be reduced in size. In addition, the weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of a drying apparatus of the present invention.

FIG. 2 is a sectional view taken along line II in FIG.

FIG. 3 is a vertical side view showing a state where the drying device of FIG. 1 is mounted on a cabinet.

FIG. 4 is a partial plan view of the desiccant of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying apparatus 11 Drying unit 12 IC timer 2 Cabinet 100 Protective case 113,114 Upper / lower seesaw-shaped shutter 102 Drying processing chamber 120 Desiccant 122 Heating wire 123 Coiled shape memory alloy wire

Claims (1)

(57) [Claims] 1. Dehumidifying air in a sealed room with a desiccant,
Drying Yoo which enables the desiccant to heat the exhaust humidity for playback processing
Drying apparatus odor enclosed cabinet having a knit
Te, the drying agent is composed of a honeycomb molded body, the
A timer is used to intermittently pass through the vertical through-holes of the compact.
An electric heating element is directly inserted in a non-contact state,
Transformed by heat to seesaw-shaped shutter
A coil-shaped shape memory alloy wire that can be driven against
It forms other vertical shaped by-penetrating in a non-contact state in the through hole formed by an enclosed cabinet of the dryer.