JP2005300125A - Low-humidity and low-temperature refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage shed having an independent chamber having both the optimum storage humidity and temperature by a low-humidity and low-temperature refrigerator. <P>SOLUTION: In this low-humidity and low-temperature refrigerator, an inside of the chamber is indirectly cooled, so called, cooled from a case outside, by guiding a cooling action for the refrigerator to an outer circumference of a low-humidity and low-temperature chamber by a guide of a fan, so as to control a temperature in an intermediate temperature, i.e. 10-20°C of temperature. A cooling mechanism is thereby not required individually. A separated automatic dehumidifier independent of the cooling mechanism is provided in one end in the inside of the chamber to control also humidity. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

Detailed Description of the Invention

  This invention belongs to the field of refrigerators in which proper storage conditions are established by controlling the internal temperature and humidity of home and commercial refrigerators independently and adding a low temperature and low humidity function. Is.

  A conventional refrigerator is cooled by the latent heat of vaporization of a refrigerant (such as Freon) in a cooler (evaporator) from a compressor and a condenser through a capillary tube, and this cooling effect (heat of evaporation) is directly used for cooling the internal air. The cooling method and this cooling effect are classified into a cooling (indirect) method in which cooling is performed by circulating in the cabinet with a fan.

  Depending on the shape of the cooler and the amount of fan air, the inside temperature is comprised of a freezing room having a temperature of about −18 ° C., a refrigerating room having a temperature of 0 to 5 ° C., and a vegetable room comprising a sealed container therein.

Here, in the case of a refrigerator (0 to 5 ° C.), moisture is frosted in the form of frost on the surface of the evaporator at a low temperature by the cooler, and by taking the moisture of the air in the refrigerator, the absolute humidity (the amount of moisture in the unit volume) ) Is reduced, but the internal humidity is generally 40 to 80%.
This is because, in order to maintain the cooling effect, it is necessary to defrost the frost on the surface of the cooler at regular intervals, and the internal humidity is rapidly increased during the defrosting.

Problems to be solved by the invention

  As described above, a normal refrigerated product is affected by high humidity (relative humidity) in the refrigerator and a decrease in absolute humidity. As a result, drying of dried vegetables, etc. (decrease in water content) and solidification of dried dried seaweed paste / powder are common experiences.

The optimum storage conditions are of course different for each packaged item. However, the present problem is solved and the problem to be solved by the present invention is a food product that requires a long edible period due to low temperature (10 to 20 ° C.) and humidity of 40% or less. As a dry tea leaf such as tea, tea, coffee, etc., all kinds of Chinese medicine, various spices, dry powder cooking materials, various mixed powder products from flour, bread crumbs, potato starch, various dry noodles, dried foods such as dried foods Kind.
These foods can be used in a wide variety of fields such as industrial chemicals, pharmaceuticals, and biotechnology.

Means for solving the problem

  Means and functions for solving the above-described problems are as follows.

  First, the cooling operation of the refrigerator is guided to the outer periphery of the low-humidity low-temperature chamber by induction with a fan, so that the interior is cooled from the outside of the case, that is, the outside of the case. This temperature control is controlled by a temperature controller installed in a low-humidity chamber and a fan with a circulating air flow to maintain an appropriate and set temperature.

  This low-humidity low-temperature storage is provided with an independent automatic dehumidifying device separate from the cooling function at one end in the storage. As this dehumidifying device, a fully automatic drying device is used that automatically heats and regenerates the desiccant at regular intervals (timer control or the like) and discharges moisture adsorbed by the desiccant to the outside of the cabinet. Of course, as other dehumidification methods, there are an electronic cooling dehumidification device using the Peltier effect and a method of electrolyzing moisture in the air using a solid polymer electrolyte membrane.

Next, embodiments of the present invention will be described with reference to the drawings.
1 is a front view of a low-humidity low-temperature refrigerator, FIG. 2 is a side cross-sectional view of the low-temperature low-humidity refrigerator, and FIG. 3 is a side cross-sectional view of the automatic dehumidifier 14 in FIG.

1. Configuration (1) Overall Configuration As shown in FIGS. 1 and 2, as a basic configuration of a refrigerator, a door is added to the cabinet 1, the upper part is a door 5 of a low-humidity low temperature storage, the central part is a door 6 of a refrigerator compartment, and the lower part is a freezing room. The door 7 is comprised.

(2) Partial configuration As shown in the side sectional view of FIG. 2, the cooling mechanism is composed of cooling (evaporating) units 10 and 11 via a compressor 8 and a condenser 9 for condensing high-temperature refrigerant in the lower part. The cooling piping connecting them is omitted.

  The cooling air is blown into each chamber by the cooling fan 12 in the freezer compartment 4 and the refrigerator compartment fan 19 in the refrigerator compartment, and further, there is a cooling fan 13 to the low-humidity low-temperature compartment 2 in the upper part. It is controlled by an automatic temperature controller 18 in the chamber 2. The fan 13 is configured so that cooling air circulates around the outer periphery of the low-humidity low-temperature chamber 2, and the temperature in the low-humidity low-temperature chamber 2 is adjusted to about 10 to 20 ° C. (the set temperature is changed depending on the application).

  Further, an automatic dehumidifier 14 is attached to a part of the low-humidity low-temperature chamber 2 so that the relative humidity of the low-humidity low-temperature chamber 2 is normally kept at 40% or less. That is, the present invention is characterized in that the cooling mechanism and the dehumidifying mechanism are configured independently of each other.

  As shown in FIG. 3, the automatic dehumidifier 14 has openings 15, 16, 21, and 22 in the case 20. A drying box 23 containing a desiccant is fixed at the center of the case 20, and a heating body 24 is provided near the center of the drying box 23. A shape memory alloy coil spring 27 is fixed to the inner side A of the upper shutter 25 and the lower shutter 26, and a bias coil spring 28 is fixed to the outer side B of the upper shutter 25 and the lower shutter 26.

  The operation will be described here. Usually, the tensile force of the bias coil spring 28 is stronger than that of the shape memory alloy coil spring 27, and the openings 15 and 16 are closed by the upper shutter 25 and the lower shutter 26. Accordingly, the openings 21 and 22 are opened, the inside of the case 20 is in a vented state, absorbs water vapor in the air inside the warehouse A, and the humidity inside the warehouse A decreases.

  Here, when the heating body 24 is energized and the temperature rises, the shape memory alloy coil spring 27 is contracted by the heat. Accordingly, the openings 21 and 22 are now closed and the openings 15 and 16 are opened. The desiccant rises in temperature due to the heat of the heating body 24, and the moisture absorbed is discharged as vapor to the outside B from the openings 15 and 16. Since the heating element 24 stops energization at a predetermined time, the openings 21 and 22 are opened, and the desiccant absorbs the water vapor inside the warehouse A again to lower the humidity.

The invention's effect

  The feature of the present invention is that the cooling capacity of the refrigerator is utilized to cool the low-humidity chamber to an intermediate temperature, that is, about 10 to 20 ° C. The objective can be achieved with (low cost).

  In order to reduce the humidity with a conventional cooling mechanism, it has been difficult to avoid that the humidity in the refrigerator rises rapidly and to a high humidity (about 80 to 90%) during defrosting.

  The present invention eliminates the high humidity during defrosting by the low temperature action from the outer periphery of the low humidity chamber independent of the cooling air.

  Further, the inside humidity is always kept in a low humidity environment by the low humidity low temperature chamber 2 independent of the air of the cooling mechanism. Therefore, the stored items can always be stored under optimum conditions for a long time in a stable low temperature and low humidity environment.

  As an optimal storage item

In addition to the above items, it is possible to ensure optimum storage conditions for a wide variety of industrial and industrial parts and materials.

Front view of low-humidity low-temperature refrigerator of embodiment 1 is a side sectional view of FIG. Side sectional view of the automatic dehumidifier 14 in FIG.

Explanation of symbols

1: Cabinet 2: Low temperature and low temperature chamber 3: Cold room 4: Freezer room 5: Door of low humidity and low temperature chamber 6: Door of refrigerator 7: Door of freezer 8: Compressor 9: Condenser 10: Freezing of cooling (evaporator) Chamber 11: Refrigerating room for cooling (evaporator) 12: Cooling fan 13: Cooling fan 14: Automatic dehumidifier 15: Opening 16: Opening 17: Insulating material 18: Automatic temperature controller 19: Refrigerating room fan 20: Case 21: Opening 22: Opening 23: Drying box 24: Heating body 25: Upper shutter 26: Lower shutter 27: Shape memory alloy coil spring 28: Bias coil spring

Claims (2)

A low-humidity and low-temperature refrigerator equipped with a low-humidity and low-temperature cabinet that uses the cooling action of the refrigerator to perform indirect cooling by the amount of cooling air around the low-humidity configuration case and adds an automatic dehumidifier to one end of this configuration case The temperature control according to claim 1 is performed by controlling the rotation of a cooling fan to a low-humidity storage case, and the humidity inside the storage is controlled by an automatic dehumidifying device.

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