JPH02214519A - Moisture proof storage - Google Patents

Abstract

PURPOSE:To improve the operational accuracy by providing a humidity sensor, a humidity setting switch and multistep humidity display LEDs on a humidity control board integrally, and constituting a humidity control microcomputer unit. CONSTITUTION:The humidity sensor 16, the humidity setting switch 17 and the multistep humidity display LEDs 15a-15f are provided integrally on the humidify control board 12 to constitute the humidity control microcomputer unit 8 which is detachably mounted in a cabinet main body. As a result, the operational accuracy is improved and the resonance speed for humidity change is raised. Moreover, the cost is reduced without increasing number of parts, and the humidity in the chamber is timely known, the maintenance and the serviceability and drastically improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a moisture-proof cabinet that maintains the inside of the cabinet at a low humidity and performs moisture-proof storage of stored items.

(Prior Art) Conventionally, moisture-proof storage is used when storing precision instruments such as cameras that dislike moisture.

This moisture-proof storage includes a drying unit containing desiccant material and a heater, and the drying unit is provided with an internal shutter that opens into the storage and an external shutter that opens to the outside of the storage. Then, by periodically opening and closing the internal shutter and the external shutter, and alternately repeating the moisture absorption by the desiccant material and the heating regeneration of the desiccant material by energizing the heater, the temperature inside the refrigerator is Moisture is absorbed by the desiccant material, and the moisture absorbed by the desiccant material is released to the outside of the refrigerator to keep the inside of the refrigerator at a low level of humidity and to preserve stored items in a moisture-proof manner for a long period of time.

By the way, humidity control in such moisture-proof storage has conventionally been performed using a nylon moisture-sensitive closed-contact type humidity controller, and humidity display has been performed using a neon tube lamp linked to the humidity controller or a mechanical analog display hygrometer. .

(Problems to be Solved by the Invention) However, in the conventional moisture-proof warehouse using a nylon moisture-sensitive closed-contact type humidity controller, the operating accuracy is poor at about ±10%, and the quality is poor. It was unreliable. In addition, the response speed to changes in humidity inside the refrigerator is slow, with experimental results recording a response time of about 10 to 15 minutes. Furthermore, when a neon tube type lamp is used as a humidity display device, a plurality of humidity controllers are required to display the humidity in multiple stages, which increases the number of parts and, therefore, increases costs. In addition, such neon tube lamps and mechanical analog display hygrometers have poor visibility, making it impossible to tell what percentage the humidity inside the chamber is currently set during operation, making them difficult to handle. Operability was poor. The above-mentioned nylon moisture-sensing closed-contact humidity controller, neon tube lamp, and mechanical analog display hygrometer are integrated into the cabinet body of the moisture-proof cabinet, and if these humidity controllers and humidity display devices are When a problem occurs, there is a problem in that repair workability and serviceability are very poor.

The present invention has been made in consideration of the above circumstances, and has good operational accuracy, fast response speed to humidity changes, and can reduce costs without increasing the number of parts. The purpose of the present invention is to provide a moisture-proof warehouse that can be easily known and has good repair workability and serviceability.

(Structure of the Invention) (Means and Effects for Solving the Problems) In order to achieve the above object, the present invention includes a humidity sensor, a humidity setting switch, and a multi-stage humidity display LED on a humidity control board. are integrally provided to constitute a humidity control microcomputer unit, and this humidity control microcomputer unit is detachably attached to the cabinet body.

The humidity setting control and humidity display inside the refrigerator are controlled by a microcomputer, thereby improving operational accuracy and speeding up the response speed to changes in humidity.

Furthermore, only the humidity control microcomputer unit can be repaired or replaced, greatly improving repair workability and serviceability.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

1 and 2 show a moisture-proof cabinet according to the present invention, and 1 is a cabinet body. A storage chamber 2 is formed within this cabinet body 1, and this storage chamber 2 is sealed to have a sealed structure so that there are no gaps. In addition, the front opening of the cabinet body 1 has an opening/closing door 3 for opening and closing the storage chamber 2.
The storage chamber 2 is sealed from the outside of the cabinet body 1 with the opening/closing door 3 closed, and the intrusion of outside air is prevented.

A dry unit 4 is attached to the storage chamber 2 with its back surface exposed to the outside from the back surface of the cabinet body 1. This drying unit 4 has a built-in drying box (not shown), and a drying material (not shown) for absorbing moisture is stored inside the drying box. Further, a semiconductor heater 5 for heating and regenerating the drying material is provided in the drying box with its heating part in contact with the drying box.

Furthermore, an internal shutter 6 that opens into the storage chamber 2 is provided on the front of the drying unit 4 and can be opened and closed, and an external shutter 7 that opens to the outside of the storage chamber 2 is provided on the back of the drying unit 4. It is set freely.

In addition, a humidity control microcombi coater unit (hereinafter referred to as a humidity control microcomputer unit) 8 is installed in the storage chamber 2 so that its display section 8a can be seen through the door glass 3a of the opening/closing door 3. There is.

FIG. 3 shows the control circuit. Humidity control microcomputer unit 8
The commercial AC power supply voltage obtained from the power plug 9 is incorporated into the humidity control board 12 via the power transformer 10 and the connector 11. This humidity control board 12 is a CPU
(Central processing unit) 13 is installed, as well as a relay 14 controlled by the microcomputer and multi-stage humidity display LEDs (light emitting diodes) 15a to 15f,
A ceramic humidity sensor 16 serves as data input means for the microcomputer, a correction circuit 19 for correcting detection errors of the humidity sensor 16, and a humidity setting switch 1.
7 is mounted and further housed in a case (not shown) to constitute a humidity control microcomputer unit 8. Here, the relay 14 controls power supply to the dry unit 4, and the humidity sensor 16 detects the humidity inside the storage chamber 2.

The humidity control microcomputer unit 8 has its connector 1
A dry unit 4 is connected via 1. This dry unit 4 has a pair of semiconductor heaters 5, and also has a motor timer 18 for forming an energizing path to the semiconductor heaters 5 at regular intervals for a predetermined period of time. The humidity control microcomputer unit 8 is removably connected to the dry unit 4 through a housing or the like.

Next, the operation of the above configuration will be explained.

When the power is turned on, the CPU 13 first sets the humidity inside the refrigerator to "4".
Automatically set to 0%. That is, CPU13
is the detected humidity of the ceramic humidity sensor 16 and the set humidity (4
0%), and when the detected humidity is greater than the set humidity, the relay 14 is turned on. Then, dry unit 4
A command signal (voltage signal) is transmitted to the storage chamber 2, thereby maintaining the humidity in the storage chamber 2 at approximately the set value (40%).

Also, when the detected humidity is lower than the set humidity, relay 1
4 is turned off, and power supply to the dry unit 4 is stopped.

By pressing the humidity setting switch 17, the humidity inside the refrigerator can be adjusted depending on the number of times the humidity setting switch 17 is pressed.
It can be set in multiple stages in the order of 0%J, r40%"..."70%". In addition, the humidity display is performed using the humidity display LED 15.
For example, "continuous J, r30% J, r
40%"..."70%", the current indoor humidity is displayed continuously, and when the humidity setting switch 17 is pressed to set the indoor humidity, 1 is displayed.
Displays “flashing” for only 0 seconds. Here, the user presses the humidity setting switch 17 several times to set the humidity inside the refrigerator to, for example, "30".
%”, first the humidity display LED 15b is set to 1.
The display blinks for 0 seconds, and the relay 14 is turned on to operate the drying unit 4.Then, when the humidity in the storage chamber 2 reaches approximately 30%, the humidity display LED
15b is displayed as "lit". Note that when the humidity setting switch 17 is pressed to set the internal humidity to "continuous", the relay 14 is turned off regardless of the operation of the ceramic humidity sensor 16.
N is given.

By the way, it is unavoidable that the detected humidity of the ceramic humidity sensor 16 decreases over time (according to experimental values, the RH decreases by 10% in 50,000 hours), but since the control circuit is provided with a correction circuit 19, the accuracy can be improved. High humidity detection can be performed at all times.

In this way, since the humidity setting control and humidity display inside the refrigerator are performed by a microcomputer, the operating accuracy is ±
The accuracy is dramatically improved to about 3%, and it is possible to improve quality and reliability. Additionally, the response time to changes in humidity within the refrigerator is fast, within 1 minute. Furthermore, the current humidity inside the refrigerator can be displayed in multiple stages using the humidity display LEDs 15a to 15f, and the humidity can be set in multiple stages with a single touch using the humidity setting switch 17. There is no need for multiple humidity controllers to display the humidity in multiple levels as in the past, and this contributes to cost reduction without increasing the number of parts. What percentage the humidity is set to can be easily known by the "blinking" of the humidity display LEDs 15a to 15f, which improves handling and operability.The humidity setting switch 17 and the humidity display Since the part 8a is integrated into the humidity control microcomputer unit 8 to make it compact, and the housing is connected and wired to the dry unit 4 so that it can be attached and detached with one touch, it is possible to prevent any malfunction from occurring in the humidity control microcomputer unit 8. If this occurs, only the humidity control microcomputer unit 8 can be repaired or replaced, and repair workability and serviceability can be greatly improved.

【Effect of the invention〕

As described above, in the present invention, the humidity setting control and humidity display in the refrigerator are controlled by a microcomputer, so that operational accuracy is improved, and quality and reliability can be improved. Furthermore, the response speed to changes in humidity within the refrigerator can be increased. Furthermore, the current humidity in the refrigerator can be displayed in multiple levels using a humidity display LED, and the humidity can be set in multiple levels with a single touch using a humidity setting switch, providing good operability.

Furthermore, displaying the humidity inside the refrigerator in multiple stages does not require an increase in the number of parts, and costs can be reduced. In addition, during operation, it is possible to easily know what percentage the humidity inside the refrigerator is currently set using the humidity display LED, thereby improving handling and operability.

The humidity setting switch and the humidity display section were integrated into the humidity control microcomputer unit to make it more compact, and it was also removably attached to the cabinet body with a single touch, so it would be possible to attach some kind of device to the humidity control microcomputer unit. If a problem occurs, only the humidity control microcomputer unit can be repaired or replaced, resulting in the effect that repair workability and serviceability can be greatly improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of a moisture-proof storage, FIG. 2 is a vertical side view of the moisture-proof storage, and FIG. 3 is a control circuit diagram. DESCRIPTION OF SYMBOLS 1... Cabinet body, 8... Humidity control microcomputer unit, 12... Humidity control board, 15a-15f.
... Humidity display LED, 16... Ceramic humidity sensor, 17... Humidity setting switch. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2

Claims (1)

[Claims] A humidity control microcomputer unit is constructed by integrally installing a humidity sensor, a humidity setting switch, and a multi-stage humidity display LED on the humidity control board, and this humidity control microcomputer unit is removably attached to the cabinet body. Features a moisture-proof storage.