JP2020125901A - Storage - Google Patents

Abstract

To provide a storage capable of stabilizing internal temperature and internal humidity in a case where the inside of the storage is dehumidified with the temperature controlled.SOLUTION: A storage 1B comprises a humidity control box 3B equipped with a dehumidifying unit 33, and a temperature control box 2B equipped with a heating unit 27 and arranged in the humidity control box 3B. The storage uses, as a wall material of the temperature control box 2B, a heat insulating material having moisture permeability or a heat insulating material provided with slits for air circulation. Due to the heat insulating property of the wall material of the temperature control box 3B, the humidity control box 3B can be dehumidified without being affected by the temperature inside the temperature control box 2B. Also, air circulation occurs between the temperature control box 2B and the humidity control box 3B due to the moisture permeability or the slits for air circulation of the wall material of the temperature control box 3B, and thus the humidity inside the temperature control box 2B follows the humidity inside the humidity control box 3B. This makes it possible to stabilize the internal temperature and internal humidity of the temperature control box 2B.SELECTED DRAWING: Figure 8

Description

The present invention relates to a storage cabinet that stably dehumidifies the interior of the cabinet while controlling the temperature.

2. Description of the Related Art Conventionally, there is known a humidity control box equipped with a dehumidifying unit for dehumidifying the inside of a box for storing stored items such as precision instruments, foods, and chemicals (for example, Patent Document 1). A dehumidifying unit used in this type of humidity control chamber has a drying device, and a shutter for selectively performing air circulation between the drying device and the interior and between the drying device and the air outside the refrigerator. .. The drying device has a desiccant that can be heated and regenerated, such as a sphere or a pellet, which is filled in the drying device, and a desiccant heater that heats and regenerates the desiccant. Then, the dehumidifying unit circulates air between the inside of the drying device and the inside of the refrigerator by the shutter, and the desiccant filled in the drying device adsorbs moisture in the air to dehumidify the air inside the refrigerator. In addition, the shutter circulates air between the inside of the drying device and the outside of the refrigerator, and the desiccant heater is operated to heat the absorbed desiccant, so that the moisture accumulated in the desiccant is periodically discharged to the outside of the refrigerator. Releases and regenerates the desiccant's drying capacity.

JP, 2013-134034, A

By the way, depending on the stored items, it is necessary to control the temperature in addition to the humidity. However, in the above conventional humidity control cabinet, for example, when a cooling unit including a compressor, a condenser, an expansion valve, and an evaporator is added to dehumidify the inside of the cabinet while cooling the interior temperature to a target temperature, The following problems occur.

That is, since the temperature and the humidity are correlated with each other, the humidity also changes in association with the temperature. Here, the cooling unit operates when the temperature is higher than the target temperature, stops when the temperature is lower than the target temperature, and repeats the operation and the stop in small steps, so that the internal temperature fluctuates in the vicinity of the target temperature in small steps. The humidity also fluctuates little by little in conjunction with this little change in temperature. Further, in the defrosting process for removing frost generated during cooling of the inside of the refrigerator, the cooling unit is stopped and the heater is operated as necessary, so that the temperature inside the refrigerator temporarily rises and the surface of the cooling unit is further increased. The frost adhering to the melts and the moisture temporarily increases the humidity. The dehumidifying unit cannot keep up with these small and large fluctuations in humidity and temporary rises, and the humidity inside the refrigerator is not stable.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a storage cabinet that can stabilize the temperature and humidity inside the cabinet when dehumidifying while controlling the temperature inside the cabinet. is there.

The present invention employs a double structure method in which a temperature control box having a heating unit is installed in a humidity control box having a dehumidifying unit, and a heat insulating material having moisture permeability on a wall material of the temperature control box or The heat inside the temperature control cabinet is prevented from being transferred to the humidity control cabinet by using an insulating material with slits for air circulation, while the humidity inside the humidity control cabinet controls the temperature through the wall of the temperature control cabinet. I tried to get it inside.

For example, the present invention
A storage cabinet that dehumidifies while controlling the temperature inside the cabinet,
A humidity control cabinet equipped with a dehumidifying unit that dehumidifies the interior of the cabinet,
Arranged in the humidity control cabinet, a temperature control cabinet equipped with a heating unit for heating the interior to a target temperature,
As the wall material of the temperature control compartment, a heat insulating material having moisture permeability or a heat insulating material provided with slits for air circulation is used.

According to the present invention, a temperature control chamber using a heat insulating material having moisture permeability as a wall material or a heat insulating material provided with slits for air circulation is arranged in the humidity control chamber, so that the temperature control is performed by the heat insulating material. It is possible to prevent the heat in the refrigerator from being transferred to the humidity control cabinet, whereby the humidity control cabinet can be dehumidified without being affected by the temperature inside the temperature control cabinet. In addition, the air inside the humidity control cabinet and the air inside the temperature control cabinet circulates through a moisture-permeable heat insulating material or a slit for air circulation, and the humidity inside the temperature control cabinet has a larger capacity. Follows the humidity inside the humidity cabinet. This makes it possible to stabilize the temperature inside the temperature control chamber and the humidity inside the temperature control chamber.

FIG. 1 is a diagram for explaining the principle of a storage cabinet 1A according to the first embodiment of the present invention. FIG. 2A and FIG. 2B are a schematic front view and a schematic rear view of the storage cabinet 1A according to the first embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of the storage 1A shown in FIG. FIG. 4 is a schematic sectional view of the dehumidifying unit 33. FIG. 5 shows measurement of the internal temperature and the internal humidity when operating the comparative example 1C of the storage 1A with the internal temperature set to 5° C. and the target humidity set to 20% RH. It is a figure which shows a result. In FIG. 6, the target temperature of the inside 20 of the temperature control cabinet 2A is set to 5° C., the target humidity of the inside 30 of the humidity control cabinet 3A is set to 20% RH, and the storage cabinet 1A is operated. It is a figure which shows the measurement result of the internal temperature and internal humidity of 2 A of temperature control warehouses and 3 A of humidity control cabinets at this time. FIG. 7 is a diagram for explaining the principle of the storage case 1B according to the second embodiment of the present invention. FIG. 8A and FIG. 8B are a schematic front view and a schematic rear view of the storage 1B according to the second embodiment of the present invention. FIG. 9 is a schematic BB sectional view of the storage case 1B shown in FIG. In FIG. 10, the target humidity of the inside 30 of the humidity cabinet 3B is set to 0% RH, the target temperature of the inside 20 of the temperature cabinet 2B is set to 50° C., and the storage cabinet 1B is operated. It is a figure which shows the measurement result of the internal temperature and internal humidity of each humidity control cabinet 3B and temperature control cabinet 2B at this time.

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

[First Embodiment]
First, the principle of the first embodiment of the present invention will be described.

As shown in FIG. 1, the storage cabinet 1A according to the present embodiment has a storage compartment 2 in which the interior compartment 20 can be cooled to a predetermined temperature (for example, 1° C. to 10° C.), and a storage compartment 30 in the storage compartment 2A. Is a double-structure storage in which a humidity control cabinet 3A capable of dehumidifying to a predetermined humidity (for example, 0% RH to 30% RH) is installed, and a heat conductive material having moisture resistance as a wall material of the humidity control cabinet 3A. (Thin plate metal, plastic, etc.) is used. The temperature control cabinet 2A has a humidity-proof property as a wall material of the humidity control cabinet 3A, although the humidity inside the cabinet fluctuates significantly (for example, 5% RH to 80% RH) due to the influence of a cooling process and a defrosting process described later. Since the heat conductive material is used, the cool air in the temperature control cabinet 2A is transmitted to the humidity control cabinet 3A through this wall material, while being unaffected by the humidity change in the cabinet 20 of the temperature control cabinet 2A. The inside 30 of the humidity control cabinet 3A can be dehumidified. Therefore, the heat conduction material having the double structure and the moisture proof property can stably keep the inside 30 of the humidity control cabinet 3A at the set temperature and humidity.

Next, details of the storage case 1A according to the present embodiment will be described.

FIG. 2A and FIG. 2B are a schematic front view and a schematic rear view of storage 1A according to the present embodiment. Further, FIG. 3 is a schematic cross-sectional view of the storage 1A shown in FIG.

The storage 1A according to the present embodiment is for storing storage items such as precision equipment, foods, chemicals, etc. that require high temperature and humidity control, and automatically cools and dehumidifies the inside of the storage. Then, the stored product is stored in a constant low temperature and low humidity state (for example, 10° C. or lower, 30% RH or lower). As shown in the figure, the storage cabinet 1A is arranged in the cabinet 20 of the temperature control cabinet 2A, which cools the cabinet 20 to a target temperature, and the humidity cabinet 3A which dehumidifies the cabinet 30. And are equipped with.

The temperature control cabinet 2A includes a housing 21 in which an opening 210 for arranging the humidity control cabinet 3A in the cabinet 20 is provided on a front surface 211, an operation panel 22 disposed on the front surface 211 of the housing 21, and the like. A unit 23, a cooling unit control panel 24, and a temperature sensor 25 for measuring the temperature inside the temperature control cabinet 2A are provided.

The operation panel 22 includes an input device such as buttons and keys for receiving various instructions and setting information from the operator, a liquid crystal panel for notifying the operator of various setting information, operating state, environmental information, and the like, LEDs, and the like. And a display device.

The cooling unit 23 includes a compressor 230 that compresses and liquefies a refrigerant vaporized by an evaporator 233, which will be described later, and a condenser 231 that is arranged outside the temperature control cabinet 2A and that cools the refrigerant liquefied by the compressor 230 with the outside air. , The expansion valve 232 that lowers the pressure of the refrigerant cooled by the condenser 231, and the refrigerant whose pressure is reduced by the expansion valve 232, which is arranged in the inside 20 of the temperature control box 2A, is vaporized and the heat of vaporization causes the inside of the box. And an evaporator 233 that cools 20.

The cooling unit control panel 24 controls the cooling unit 23 so that the internal temperature of the temperature control cabinet 2A detected by the temperature sensor 25 becomes the target temperature received from the operator via the operation panel 22. The cooling unit control panel 24 includes a temperature sensor IF section 240, an operation panel IF section 241, a cooling unit IF section 242, and a main control section 243.

The temperature sensor IF section 240 is an interface for connecting the main control section 243 to the temperature sensor 25. The operation panel IF section 241 is an interface for connecting the main control section 243 to the operation panel 22. The cooling unit IF section 242 is an interface for connecting the main control section 243 to the cooling unit 23.

If the internal temperature of the temperature control box 2A detected by the temperature sensor 25 is higher than the target temperature received from the operator via the operation panel 22, the main controller 243 operates the cooling unit 23 to operate the temperature control box. The inside 20 of 2A is cooled, and if it is low, the cooling unit 23 is stopped to stop the cooling inside 20 of the temperature controlled cabinet 2A (cooling process). As a result, since the cooling unit 23 repeats the operation and the stop in small increments, the internal temperature of the temperature control cabinet 2A fluctuates in the vicinity of the target temperature, and the humidity also fluctuates in conjunction with this.

Further, the main control unit 243 stops the cooling unit 23 for a predetermined time (for example, 1 hour) every predetermined time (for example, 8 hours), and operates the defrosting heater as necessary to operate the temperature control box 2A. The inside 20 is defrosted (defrosting process). As a result, the temperature inside the temperature control cabinet 2A temporarily rises, the frost melts, and the moisture therein also temporarily raises the humidity inside the cabinet.

The humidity control cabinet 3A is provided with a housing 31 having an open front surface 310, a front door 310 of the housing 31, a door 32 for accessing the interior 30, a dehumidification unit 33, a dehumidification unit control panel 34, and a conditioning cabinet. A humidity sensor 35 for measuring the humidity inside the wet box 3A.

The housing 31 is arranged in the inside 20 of the temperature control cabinet 2A such that the front surface 310 is located in the opening 210 of the housing 21 of the temperature control cabinet 2A. As the wall material of the housing 31, a heat conductive material having a moisture-proof property such as a thin metal plate or plastic is used.

The dehumidifying unit 33 dehumidifies the inside 30 of the humidity control cabinet 3A using a desiccant such as zeolite or silica gel that can be heated and regenerated.

FIG. 4 is a schematic sectional view of the dehumidifying unit 33.

As illustrated, the dehumidifying unit 33 is arranged so as to close an opening 312 formed in the back plate 311 of the housing 31, for example. In addition, here, the dehumidifying unit 33 is arranged in the inside 30 so as to close the opening 312 from the inside 30 side, but the opening 312 is opened from the outside (inside the inside 20 of the temperature controlled compartment 2A) side. You may arrange|position outside so that it may block. The dehumidifying unit 33 includes at least one drying device 330, a fan 331, and a housing 332 that houses the drying device 330 and the fan 331.

The housing 332 has in-compartment air intake ports 333a and 333b for taking in the air B1 in the in-compartment 30 into the housing 332 as an in-compartment air vent connecting the inside of the housing 332 and the in-compartment 30 and air in the housing 332. Internal exhaust ports 334a and 334b for discharging B2 into the internal space 30 are formed. In addition, outside air intake ports 335a and 335b for taking in outside air A1 into the housing 332 as outside air vents that connect the inside of the housing 332 and the outside (inside 20 of the temperature control box 2A). Out-compartment exhaust ports 336a and 336b for exhausting the air A2 in the housing 332 to the outside of the compartment are formed. The fan 331 forces the air between the inside of the housing 332 and the inside 30 or the outside (the inside 20 of the temperature control cabinet 2A) via the ventilation holes 333a, 333b to 336a, 336b. Driven to circulate.

The drying device 330 includes a drying agent 337 having a spherical shape or a pellet shape filled in the drying apparatus 330, and a desiccant heater 338 accommodated in the drying apparatus 330 together with the drying agent 337. The drying device 330 dehumidifies the air taken into the housing 332 from the inside 30 by absorbing the moisture with the desiccant 337. In addition, the desiccant 337 is heated by the desiccant heater 338, and the moisture absorbed by the desiccant 337 is discharged from the inside of the housing 332 to the outside (inside the inside 20 of the temperature controlled store 2A).

The desiccant 337 is a desiccant that can be heated and regenerated, such as zeolite or silica gel, and the desiccant 337 having a predetermined amount according to the space in the chamber 30 can sufficiently dehumidify the air in the chamber 30. It is filled with 330. Although not shown, the drying device 330 is provided with a plurality of slits having a width narrower than the particle diameter of the desiccant 337. The desiccant 337 dehumidifies the inside of the housing 332 or discharges moisture through the slit.

The desiccant heater 338 heats the desiccant 337 filled in the drying device 330 under the control of the dehumidifying unit control panel 34 to discharge the water accumulated in the desiccant 337 to regenerate the drying capacity.

Further, the dehumidifying unit 33 includes a shutter 339a that exclusively opens and closes the internal intake port 333a and the external intake port 335a, and a shutter 339b that exclusively opens and closes the internal exhaust port 334a and the external exhaust port 336a. , Are further provided.

The dehumidifying unit control panel 34 controls the dehumidifying unit 33 based on the inside humidity detected by the humidity sensor 35 in accordance with the instruction received from the operator via the operation panel 22 to bring the inside 30 into a desired humidity state. To do. As shown in the figure, the dehumidifying unit control panel 34 includes a humidity sensor IF section 340, an operation panel IF section 341, a dehumidifying unit IF section 342, and a main control section 343.

The humidity sensor IF unit 340 is an interface for connecting the main control unit 343 to the humidity sensor 35. The operation panel IF unit 341 is an interface for connecting the main control unit 343 to the operation panel 22. The dehumidifying unit IF section 342 is an interface for connecting the main control section 343 to the dehumidifying unit 33.

If the internal humidity of the humidity control box 3</b>A detected by the humidity sensor 35 is higher than the target humidity received from the operator via the operation panel 22, the main controller 343 sets the inside of the housing 332 only in the internal box 30. The fan 331 is rotated as necessary in the open state (in-compartment intake port 333a: open, outside-compartment intake port 335a: closed, inside-compartment exhaust port 334a: open, outside-compartment exhaust port 336a: closed). As a result, the moist air B1 in the interior 30 is taken into the housing 332, dehumidified by absorbing the desiccant 337 of the drying device 330, and then discharged into the interior 30 as dry air B2. The inside 30 is dehumidified (dehumidification process). If the humidity inside the humidity control box 3A is lower than the target humidity, the inside of the housing 332 is opened only to the outside (the inside 20 of the temperature control box 2A) (inside air intake port 333a: closed, box The outside dehumidification process of the inside 30 is stopped by setting the outside intake port 335a: open, the inside exhaust port 334a: closed, and the outside exhaust port 336a: open.

Further, the main control unit 343 keeps the inside of the housing 332 open for a fixed time (for example, 1 hour) only outside the storage for every predetermined time (for example, 6 hours) (in-air intake port 333a: closed, outside-air intake port). 335a: open, internal exhaust port 334a: closed, external exhaust port 336a: open), the desiccant heater 338 is operated to heat the desiccant 337, and the fan 331 is rotated as necessary. As a result, the outside air A1 is taken into the housing 332, the accumulated water is released from the desiccant 337 heated by the desiccant heater 338, and then the outside air is discharged as the moist air A2. The desiccant 337 dries (heat regeneration treatment).

By controlling the dehumidifying unit 33 as described above, the dehumidifying unit control panel 34 keeps the inside 30 of the humidity control cabinet 3A at a desired humidity state and also maintains the dehumidifying ability of the desiccant 337 of the drying device 330. To do.

The first embodiment of the present invention has been described above.

According to the storage cabinet 1A according to the present embodiment, the temperature control cabinet 2A has the humidity control cabinet 3A that uses a heat conductive material having moisture resistance as a wall material. It is possible to convey the cool air in the inside 20 of the temperature control cabinet 2A to the humidity control cabinet 3A while suppressing the influence of the humidity change of 20. At this time, the cool air in the temperature control cabinet 2A is transferred to the humidity control cabinet 3A via the heat-conducting material having moisture resistance, so that the temperature inside the temperature control cabinet 2A is fluctuated or temporarily changed by the cooling unit 23. Since the internal temperature and humidity inside the humidity control cabinet 3A can be dehumidified by the dehumidifying unit 33 without being affected by the humidity fluctuation caused by the small temperature change, Can be stabilized.

As a comparative example, the present inventor removes the housing 31 of the humidity control cabinet 3A from the housing 21 of the temperature control cabinet 2A, and removes the dehumidification unit 33, the dehumidification unit control panel 34, and the humidity sensor 35 of the humidity control cabinet 3A. A storage cabinet 1C is provided, which is installed on the back side of the housing 21 of the temperature control cabinet 2A, and cools the inside 20 of the temperature control cabinet 2A by the cooling unit 23 while simultaneously dehumidifying it by the dehumidifying unit 33. The target temperature inside the storage 1C was set to 5° C., the target humidity was set to 20% RH, and the internal temperature and the internal humidity when the storage 1C was operated for a long time were measured. Here, the defrosting process of the cooling unit 23 is performed every 8 hours for 1 hour, and the heating regeneration process of the dehumidifying unit 33 is set to be performed every 6 hours for 30 minutes.

FIG. 5: is a figure which shows the measurement result of the inside temperature and the inside humidity when the comparative example 1C of the storage 1A is operated on the above-mentioned conditions. Here, the graph 40 shows the inside temperature and the graph 41 shows the inside humidity.

The cooling unit 23 operates when the internal temperature is higher than the target temperature, stops when the internal temperature is low, and repeats the operation and the stop in small steps. For this reason, as shown in the figure, the internal temperature fluctuates little by little around the target temperature (reference numeral 400). The in-compartment humidity also fluctuates little and greatly in association with this small change in the in-compartment temperature (reference numeral 410). Further, the cooling unit 23 periodically (here, every 8 hours) is stopped for a predetermined time (here, 1 hour) to defrost the inside of the refrigerator. For this reason, as shown in the figure, the temperature inside the refrigerator temporarily rises (reference numeral 401), and along with this, the humidity inside the refrigerator temporarily rises (reference numeral 411). In Comparative Example 1C, the cooling unit 23 and the dehumidifying unit 33 are arranged inside the refrigerator to cool and dehumidify the inside of the refrigerator at the same time. It can't keep up and the humidity in the refrigerator is not stable.

Next, the present inventor sets the target temperature of the inside 20 of the temperature control box 2A to 5° C. and sets the target humidity 20 of the inside 30 of the humidity control box 3A in the storage box 1A according to the present embodiment. The temperature was set to %RH and the operation was continued for a long time, and the temperature and humidity inside the temperature control chamber 2A and the humidity control chamber 3A were measured. Here, the defrosting process of the cooling unit 23 is performed every 12 hours for 1 hour, and the heating regeneration process of the dehumidifying unit 33 is set to be performed every 6 hours for 30 minutes.

FIG. 6 is a diagram showing the measurement results of the internal temperature and internal humidity of each of the temperature control chamber 2A and the humidity control chamber 3A when the storage cabinet 1A is operated under the above conditions. Here, a graph 42 is a temperature inside the temperature control cabinet 2A, a graph 43 is a humidity inside the temperature control cabinet 2A, a graph 44 is a temperature inside the humidity control cabinet 3A, and a graph 45 is a temperature inside the humidity control cabinet 3A. The internal humidity is shown respectively.

The cooling unit 23 operates when the internal temperature is higher than the target temperature, stops when the internal temperature is low, and repeats the operation and the stop in small steps. Therefore, as shown in the figure, the temperature inside the temperature control cabinet 2A fluctuates little by little near the target temperature (reference numeral 420). The internal humidity of the temperature control box 2A also changes little by little and greatly in association with this small change in internal temperature (reference numeral 430). Further, the cooling unit 23 is periodically (here, every 12 hours) stopped for a predetermined time (here, 1 hour) to defrost the inside of the refrigerator. Therefore, as shown in the figure, the temperature inside the temperature control cabinet 2A temporarily rises (reference numeral 421), and along with this, the humidity inside the temperature control cabinet 2A also temporarily increases (reference numeral 431).

However, in the humidity control cabinet 3A arranged in the temperature control cabinet 2A, since the heat conducting material having the moisture proof property is used as the wall material, the fluctuation of the humidity inside the temperature control cabinet 2A causes the humidity control cabinet 3A to fluctuate. It is possible to prevent it from affecting the internal humidity. Further, since the temperature inside the temperature control cabinet 2A is transmitted to the humidity control cabinet 3A via the heat conducting material having moisture resistance, as shown in the figure, the temperature inside the temperature control cabinet 2A is higher than the temperature inside the temperature control cabinet 2A. Fluctuations in the internal temperature of 3 A become gentle (reference numerals 440 and 441). Since the dehumidifying unit 33 can absorb the change in the humidity inside the humidity control cabinet 3A due to the change in the inside temperature of the gentle humidity control cabinet 3A, the inside of the temperature control cabinet 2A can be absorbed as shown in the figure. Compared with the fluctuation of humidity (reference numerals 430 and 431), the fluctuation of humidity inside the humidity control cabinet 3A becomes gentler (reference numerals 450 and 451).

From the above measurement results, according to the storage cabinet 1A according to the present embodiment, the internal temperature and the internal humidity of the humidity control cabinet 3A are more stable than those of Comparative Example 1C in which the inside of the cabinet is cooled and dehumidified simultaneously. It turns out that I can do it.

[Second Embodiment]
First, the principle of the second embodiment of the present invention will be described.

As shown in FIG. 7, the storage cabinet 1B according to the present embodiment has a storage compartment 30 in which the interior compartment 30 can be dehumidified to a predetermined humidity (for example, 0% RH to 30% RH). It is a double-structure storage cabinet in which a temperature control cabinet 2B capable of heating the inside 20 to a predetermined temperature (for example, 40°C to 70°C) is installed, and a slit for air circulation is provided as a wall material of the temperature control cabinet 2B. Insulated materials (thick plate metal, plastic, etc.) are used. Since a heat insulating material provided with slits for air circulation is used as the wall material of the temperature control cabinet 2B, the inside 30 of the humidity control cabinet 3B and the inside of the temperature control cabinet 2B are provided through the slits for air circulation. While the air of 20 circulates and the humidity inside the temperature control cabinet 2B follows the humidity inside the humidity control cabinet 3B having a larger capacity, it is not affected by the temperature of the inside 20 of the temperature control cabinet 2B. The inside 30 of the humidity control box 3B can be dehumidified. Therefore, the double structure and the heat insulating material provided with the slits for air circulation can stably maintain the inside temperature 20 of the temperature control cabinet 2B at the set temperature and humidity.

Next, details of the storage case 1B according to the present embodiment will be described.

FIG. 8A and FIG. 8B are a schematic front view and a schematic rear view of the storage 1B according to the second embodiment of the present invention. Further, FIG. 9 is a schematic cross-sectional view taken along the line BB of the storage 1B shown in FIG. Here, constituent elements having the same functions as those of the storage cabinet 1A according to the first embodiment of the present invention are designated by the same reference numerals.

The storage cabinet 1B according to the present embodiment is for storing storage articles such as precision instruments, foods, chemicals, etc. that require high temperature and humidity control, and automatically heats and dehumidifies the inside of the cabinet. Then, the stored product is stored in a constant high temperature and low humidity state (for example, 50° C. or higher and 30% RH or lower). As shown in the figure, the storage cabinet 1B is disposed in the humidity control cabinet 3B that dehumidifies the interior 30 and the temperature control cabinet 2B that is disposed in the interior 30 of the humidity control cabinet 3B and heats the interior 20 to a target temperature. And are equipped with.

The humidity control cabinet 3B includes a housing 36 in which an opening 360 for disposing the temperature control cabinet 2B in the interior 30 is provided on the front surface 361, an operation panel 37 disposed on the front surface 361 of the housing 36, and the dehumidification chamber. A unit 33, a dehumidifying unit control panel 34, and a humidity sensor 35 that measures the humidity inside the humidity control box 3B are provided.

The operation panel 37 includes an input device such as buttons and keys for receiving various instructions and setting information from the operator, a liquid crystal panel for notifying the operator of various setting information, operating state, environmental information, and the like, LEDs, and the like. And a display device.

The dehumidifying unit 33 dehumidifies the inside 30 of the humidity control cabinet 3B by using a heat-recyclable desiccant such as zeolite or silica gel, and its configuration is that of the first embodiment shown in FIG. Is the same as.

The dehumidifying unit control panel 34 controls the dehumidifying unit 33 based on the inside humidity detected by the humidity sensor 35 in accordance with the instruction received from the operator via the operation panel 37, and brings the inside 30 into a desired humidity state. The configuration is similar to that of the first embodiment shown in FIG.

The temperature control cabinet 2B is provided with a housing 26 having an open front surface 260, a front surface 260 of the housing 26, a door 29 for accessing the inside 20, a heating unit 27, a heating unit control panel 28, and a temperature control box. The temperature sensor 25 that measures the temperature inside the warm box 2B.

The housing 26 is disposed in the inside 30 of the humidity control cabinet 3B such that the front surface 260 is located at the opening 360 of the housing 36 of the humidity control cabinet 3B. As the wall material of the housing 26, a heat insulating material such as a thick plate of metal or plastic having a slit 262 for air circulation provided on the back surface 261 is used.

Although not shown, the heating unit 27 includes a resistor such as a nichrome wire or ceramic, a plurality of PTC (Positive Temperature Coefficient) thermistors having different Curie points, and a selector for selecting a PTC thermistor connected to the resistor. The temperature control cabinet 2B is heated by supplying a current to the resistor through the PTC thermistor selected by the selector to heat the resistor.

The heating unit control panel 28 controls the heating unit 27 so that the internal temperature of the temperature control cabinet 2B detected by the temperature sensor 25 becomes the target temperature received from the operator via the operation panel 37. The heating unit control panel 28 includes a temperature sensor IF section 280, an operation panel IF section 281, a heating unit IF section 282, and a main control section 283.

The temperature sensor IF unit 280 is an interface for connecting the main control unit 283 to the temperature sensor 25. The operation panel IF unit 281 is an interface for connecting the main control unit 283 to the operation panel 37. The heating unit IF section 282 is an interface for connecting the main control section 283 to the heating unit 27.

The main control unit 283 causes the selector to select a PTC thermistor having a Curie point in which the temperature inside the temperature controlled cabinet 2B detected by the temperature sensor 25 is close to the target temperature received from the operator via the operation panel 37. The heating unit 27 is controlled to reduce the heat generation of the resistor by reducing the amount of current flowing into the resistor near the target temperature by causing the resistor to generate heat by passing a current through the PTC thermistor. Further, the main controller 283 adjusts the temperature detected by the temperature sensor 25 if the temperature inside the temperature control box 2B detected by the temperature sensor 25 is higher than the target temperature received from the operator via the operation panel 37. The operation of the heating unit 27 is stopped until the internal temperature of the warm box 2B becomes lower than the target temperature.

The second embodiment of the present invention has been described above.

According to the storage cabinet 1B according to the present embodiment, the temperature control cabinet 2B using the heat insulation material provided with the air circulation slits 262 as the wall material is arranged in the humidity control cabinet 3B. Thus, the heat in the temperature control cabinet 2B can be prevented from being transferred to the humidity control cabinet 3B, whereby the humidity control cabinet 3B can be dehumidified without being affected by the temperature inside the temperature control cabinet 2B. In addition, the air in the inside 30 of the humidity control cabinet 3B and the inside 20 of the temperature control cabinet 2B circulates through the air circulation slit 262, and the humidity in the temperature control cabinet 2B has a larger capacity. Follows the humidity inside the wet box 3B. This makes it possible to stabilize the internal temperature and internal humidity of the temperature control box 2B.

In addition, since the inside 20 of the temperature control cabinet 2B having a smaller capacity than the humidity control cabinet 3B is heated to control the temperature inside the cabinet, compared to the case where the entire humidity control cabinet 3B is heated to control the temperature inside the cabinet. Power consumption can be kept low.

Further, while keeping the stored items requiring both humidity control and temperature control in the inside 20 of the temperature control cabinet 2B, the stored items requiring only humidity control are stored in the inside 30 of the humidity control cabinet 3B. You can

The present inventor sets the target humidity of the inside 30 of the humidity control box 3B to 0% RH and sets the target humidity of the inside 20 of the temperature control box 2B to 50° C., according to the present embodiment. The storage cabinet 1B was operated for a long time, and the internal temperature and internal humidity of each of the humidity control cabinet 3B and the temperature control cabinet 2B at that time were measured. Here, the heating/regenerating process of the dehumidifying unit 33 is set to be performed every 6 hours for 30 minutes.

FIG. 10 is a diagram showing the measurement results of the internal temperature and internal humidity of each of the humidity control chamber 3B and the temperature control chamber 2B when the storage cabinet 1B is operated under the above conditions. Here, the graph 46 is the temperature inside the humidity control cabinet 3B, the graph 47 is the humidity inside the humidity control cabinet 3B, the graph 48 is the temperature inside the temperature control cabinet 2B, and the graph 49 is the temperature control cabinet 2B. The internal humidity is shown respectively.

As shown in the figure, the temperature inside the temperature control cabinet 2B is stabilized near the target temperature by the heating unit 27 (graph 48), but since a heat insulating material is used as the wall material of the temperature control cabinet 2B, the temperature control cabinet is kept. The heat in 2B is not transmitted to the humidity control box 3B, and therefore the temperature inside the humidity control box 3B is not affected by the temperature inside the temperature control box 2B (graph 46). As a result, the inside 30 of the humidity cabinet 3B is dehumidified by the dehumidifying unit 33 without being affected by the inside temperature of the temperature cabinet 2B, and the humidity inside the humidity cabinet 3B is stabilized (graph 47). In addition, the air in the inside 30 of the humidity control cabinet 3B and the inside 20 of the temperature control cabinet 2B circulates through the slit 262 for air circulation, so that the humidity inside the temperature control cabinet 2B has a larger capacity. It follows the humidity inside the humidity control box 3B (graph 49).

From the above measurement results, according to the storage cabinet 1B according to the present embodiment, similar to the storage cabinet 1A according to the first embodiment of the present invention, the internal temperature and internal humidity of the temperature control cabinet 2B are stabilized. I found that I could do it.

In the second embodiment of the present invention, a heat insulating material provided with slits 262 for air circulation is used as the wall material of the temperature control cabinet 2B, and the humidity control cabinet 3B is controlled through the slits 262 for air circulation. Although the air in the compartment 30 and the compartment 20 of the temperature control compartment 2B is circulated, the present invention is not limited to this. By using a moisture-permeable heat insulating material such as a fiber-based heat insulating material, the air in the inside 30 of the humidity control chamber 3B and the inside 20 of the temperature control chamber 2B may be circulated.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist thereof.

For example, in each embodiment of the present invention, the functional configuration of the dehumidifying unit control panel 34 (see FIGS. 2 and 8), the functional configuration of the cooling unit control panel 24 (see FIG. 2), and the function of the heating unit control panel 28. The configuration (see FIG. 8) may be implemented by an integrated logic IC such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array), or a DSP (Digital Signal) computing device such as a DSP. May be realized by software. Alternatively, in a general-purpose computer including a CPU, a memory, and an auxiliary storage device such as an HDD, the CPU may be realized by loading a predetermined program from the auxiliary storage device onto the memory and executing the program.

Further, in each of the embodiments of the present invention, the fan 331 of the dehumidifying unit 33 may be omitted. Further, the operation panels 22 and 37 may be omitted. When the operation panels 22 and 37 are omitted, the target humidity is set in advance in the dehumidifying unit control panel 34. Similarly, the target temperature is set on the cooling unit control panel 24 and the heating unit control panel 28.

Further, in each of the embodiments of the present invention, the dehumidifying unit control panel 34 may be integrated with the dehumidifying unit 33. Alternatively, the dehumidifying unit control panel 34 may be omitted and the dehumidifying unit 33 may be controlled manually. Further, the cooling unit control board 24 may be integrated with the cooling unit 23. Alternatively, the cooling unit control panel 24 may be omitted and the cooling unit 23 may be controlled manually. Similarly, the heating unit control panel 28 may be integrated with the heating unit 27. Alternatively, the heating unit control panel 28 may be omitted and the heating unit 27 may be controlled manually.

Further, in each of the embodiments of the present invention, the doors 29 and 32 of the storage cabinets 1A and 1B are common to the temperature control cabinets 2A and 2B and the humidity control cabinets 3A and 3B, but the present invention is not limited to this. Not done. A door may be separately provided for each of the temperature control cabinets 2A and 2B and the humidity control cabinets 3A and 3B.

1A, 1B: storage, 2A, 2B: temperature control, 3A, 3B: humidity control, 20: temperature control 2A, 2B inside, 21: temperature control 2A housing, 22, 37: operation Panel, 23: Cooling unit, 24: Cooling unit control panel, 25: Temperature sensor, 26: Cabinet of temperature control cabinet 2B, 27: Heating unit, 28: Heating unit control panel, 29, 32: Door, 30: Control Inside the moisturizers 3A and 3B, 31: housing of the moisturizer 3A, 33: dehumidifying unit, 34: dehumidifying unit control panel, 35: humidity sensor, 36: housing of the humidifier 3B, 210: housing 21: front face of housing 21, 230: compressor, 231: condenser, 232: expansion valve, 233: evaporator, 240, 280: temperature sensor IF unit, 241, 281, 341: operation panel IF unit, 242: cooling unit IF section, 243, 283, 343: main control section, 260: front surface of housing 26, 261: rear surface of housing 26, 262: slit for air circulation, 310: front surface of housing 31, 330 : Drying device, 331: Fan, 332: Housing, 333a, 333b: Inside air intake port, 334a, 334b: Inside air exhaust port, 335a, 335b: Outside air intake port, 336a, 336b: Outside air exhaust port, 337: Desiccant, 338: heater for desiccant, 339a, 339b: shutter, 342: dehumidifying unit IF section, 360: opening of case 36, 361: front of case 36

Claims (4)

A storage cabinet that dehumidifies while controlling the temperature inside the cabinet,
A humidity control cabinet equipped with a dehumidifying unit that dehumidifies the interior of the cabinet,
Arranged in the humidity control cabinet, a temperature control cabinet equipped with a heating unit for heating the interior to a target temperature,
The temperature control box is a storage box characterized in that a heat insulating material having a moisture permeability or a heat insulating material provided with slits for air circulation is used as a wall material. The storage according to claim 1,
The heating unit is
A storage with a resistor that operates when the temperature is lower than the target temperature and stops when the temperature is higher than the target temperature. The storage according to claim 1 or 2,
The dehumidifying unit is
A drying device in which a desiccant capable of being heated and regenerated is filled and a heater for the desiccant is housed,
A shutter for selectively performing air circulation between the inside of the drying device and the inside of the refrigerator in which the dehumidifying unit is mounted, and an air circulation inside the drying device and outside the refrigerator in which the dehumidifying unit is mounted,
The shutter circulates air between the inside of the drying device and the inside of the chamber in which the dehumidifying unit is mounted, and the desiccant filled in the drying device absorbs moisture so that the air in the chamber in which the dehumidifying unit is mounted is absorbed. Dehumidifying treatment for dehumidifying the air, and air circulation between the inside of the drying device and the outside of the chamber where the dehumidifying unit is mounted by the shutter, and operating the desiccant heater housed in the drying device. Control means for heating the desiccant filled in the drying device, controlling the execution of a heating regeneration process for discharging the water accumulated in the desiccant to the outside and regenerating the drying capacity of the desiccant. A storage that is equipped with. A temperature control cabinet, which is used as the temperature control cabinet of the storage cabinet according to claim 1.

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