JPH06307751A - Indoor circulation type freshness preserving device for cold insulation box and the like - Google Patents

Abstract

PURPOSE:To provide a device for eliminating an irregular temperature difference of the air in a room, filtering and discharging excess ethylene, enhancing an accuracy of regulating humidity at the time of a low temperature and bringing preservation of freshness in a cold insulation box for fresh products such as vegetables, fruits, etc. CONSTITUTION:A cold insulation box, etc., for circulating cold gas in a room of a refrigerator comprises a circulation duct 1 provided along a peripheral wall in the room in such a manner that the duct 1 has a horizontal guide duct 3 installed in a bottom of the room and an erected main duct 2 erected to communicate with an intermediate position of the duct 3, a small-sized suction type blower 4 contained in an upper part of the duct 2 and provided with a suction port 5 and an ethylene filtering panel 6 provided at an intermediate height. An indoor circulation type freshness preserving device for the box comprises a dry-bulb-wet-bulb sensor provided at a position directly under the panel 6 in such a manner that the sensor is electrically connected to the blower 4 to regulate its output thereby to accurately regulate the humidity at a low temperature, and exhaust ports 7 arranged at each interval of the duct 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulation-type freshness maintaining device which is installed in a refrigerating box for fresh products such as vegetables, fruits and grains, or in a refrigerating vehicle for transporting these at a low temperature.

[0002]

2. Description of the Related Art In conventional cold storages, refrigerated transport vehicles, and the like that are kept cold by refrigerators, it is difficult to make the air in the room uniform and the temperature uniform, and in particular, the temperature difference between the corners of the room and other parts Since it was about + -4 ° C, it was impossible to maintain uniform freshness. In order to compensate for this, there are some cases in which a far-infrared radiation substance is placed in the flow of the refrigerator to activate the entire indoor air, but it is the current situation that a sufficient effect cannot be expected yet.
Agricultural products that produce ethylene (strawberry, cherry,
The problem of loss of freshness due to ethylene has not been solved in the case of mixed delivery and mixed loading (e.g., carnation) with other items. Furthermore, the accuracy of humidity adjustment at low temperatures could not be expected.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and by installing a circulation duct incorporating an ethylene filtration panel in a room, unevenness of indoor air and temperature difference can be prevented. A circulation-type device that eliminates the problems and eliminates excess ethylene generated from agricultural products by filtration, and further improves the accuracy of humidity adjustment at low temperatures to effectively maintain the freshness of fresh products such as vegetables and fruits. Try to provide.

[0004]

In order to achieve the above object, the present invention provides a circulation duct 1 along a peripheral wall of a cold storage box or the like in which a cool air is circulated in a room by a refrigerator. The circulation duct 1 is composed of a horizontal guide duct 3 installed at the bottom of the room and an upright main duct 2 which is erected in a communication state at an intermediate portion of the horizontal guide duct 3. The upright main duct 2 has a small suction type blower 4 above it.
Is provided with an intake port 5, and an ethylene filtration panel 6 is provided at an intermediate height thereof. Further, exhaust ports 7 are arranged at intervals of the guide duct 3 to form a circulation type freshness maintaining device (FIG. 1). Further, in this configuration, a dry-bulb / wet-bulb sensor-8 is further provided directly below the ethylene filtration panel 6 in the upright main duct 2, and the sensor-8 and the small suction blower 4 are electrically connected to adjust the output. It is a circulation type freshness maintaining device that enables the humidity control at low temperature (Fig. 2). In these devices,
It goes without saying that the operation of the blower 4 is controlled outside the room electrically connected like the refrigerator. Note that FIG.
Inside, 9 is a sensor-wearing tool, and 10 is a sensor-doorway.

[0005]

When the agricultural products such as strawberries, pears and shiitake mushrooms are stored, loaded and stored or transported, the blower 4 of the circulation duct 1 of the present invention is operated together with the refrigerator. This will be described with reference to FIG. 3 and FIG. 4, which are taken as an example of a refrigerated transport vehicle. Cool air is sucked in through the intake port 5 above the main duct 2. Then, while being filtered by the ethylene filtration panel 6 to remove ethylene, it is guided to the front and rear horizontal guide ducts 3 installed along the lower wall, and discharged into the room through the exhaust ports 7 provided on the side surface or the upper surface of the duct. To be done. Further, in the embodiment provided with the dry-bulb / wet-bulb sensor-8, the sensor-8 and the small-sized suction type blower 4 are electrically connected to adjust the output, and the sensor-8 can be accurately operated in the flow of cold air. Sensitive wet-bulb temperature provides accurate humidity control at low temperatures.

[0006]

As described above, according to the present invention, it is impossible to circulate the cold air in the refrigerator, so that the air in the room cannot be made uniform and the temperature cannot be made uniform so that the freshness cannot be kept uniform. (Temperature difference is + -4 ° C) Compared to the conventional cold storage and refrigerated transport vehicles, forced air circulation through the circulation duct spreads the cool air to the upper and lower corners of the room, eliminating the unevenness of air and temperature difference. In an experiment of human beings, the excess ethylene was removed by an ethylene filtration panel in a human experiment, and in a mode equipped with a dry-bulb / wet-bulb sensor-8, the sensor-8 was operated in the flow of cold air. Detects accurate wet bulb temperature,
Since the accuracy of humidity adjustment at low temperature can be brought about by adjusting the wind speed, it has succeeded in significantly improving the freshness maintaining effect as a whole. By using the device of the present invention, planned shipment by extending the shipping time of vegetables and fruits,
It will contribute to the expansion of sales area, rationalization of cultivation work, elimination of labor shortage, and when installed in cultivation houses such as shiitake mushrooms, CO _{2 is} removed from the ceiling open type (heat calorie, It can be changed to an indoor method instead of a loss of humidity), which contributes to resource conservation, and the profits to growers are immeasurable.

[0007]

EXAMPLE A refrigerating transport vehicle A in which a small refrigerator C circulates cold air in a room R is provided with circulation ducts 1 along both walls of the room R. The circulation duct 1 is composed of a horizontal guide duct 3 installed on the loading platform B and an upright main duct 2 which is erected in a communication state at an intermediate portion of the guide duct 3. Further, the upright main duct 2 has a small suction blower 4 built in above it and an intake port 5 is provided, and an ethylene filtration panel 6 made of a coconut husk activated carbon layer is exchangeably provided at an intermediate height thereof. Further, exhaust ports 7 are arranged at appropriate intervals in the guide duct 3. The blower 4 is controlled in the driver's seat by electrical wiring like the refrigerator.

[Brief description of drawings]

FIG. 1 is a perspective view.

FIG. 2 is a perspective view of another embodiment.

FIG. 3 is a vertical cross-sectional side view of a refrigerated vehicle equipped with the device of the present invention.

FIG. 4 is a cross-sectional plan view of a refrigerated vehicle equipped with the device of the present invention.

[Explanation of sign]

 1 Circulation Duct 2 Upright Main Duct 3 Induction Duct 4 Small Blower 5 Intake Port 6 Ethylene Filtration Panel 7 Exhaust Port 8 Dry-bulb / wet-bulb sensor-

Claims (2)

[Claims] 1. A refrigerating machine or the like for circulating cold air in a room is provided with a circulation duct (1) along a peripheral wall of the room, and the circulation duct (1) is a horizontal induction duct installed at the bottom of the room. (3) and an upright main duct (2) which is erected in a communication manner at an intermediate portion between the horizontal induction duct (3) and a small suction blower (4) built in above the upright main duct (2). In addition, an intake port (5) is provided, an ethylene filter panel (6) is provided at an intermediate height, and an exhaust port (7) is provided at intervals between the induction ducts (3) to maintain freshness inside the circulation type. apparatus. 2. A dry-bulb / wet-bulb sensor (8) is provided directly below the ethylene filtration panel (6) in the upright main duct (2), and the sensor (8) and a small suction blower (4) are provided. 2. The internal circulation type freshness maintaining device according to claim 1, wherein the output is adjustable by electrically connecting the above, and humidity can be adjusted accurately at low temperature.