JP2761307B2 - Food cold storage equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-temperature storage device for food, and more particularly to a low-temperature storage device capable of storing food for a long period of time by using the low temperature in winter in a cold region with as little energy consumption as possible.

[0002]

2. Description of the Related Art As one type of low-temperature storage of food, the use of low temperature in winter in a cold region has been used for a long time, and as a simple storage device, a space for storing food in the ground is provided. Food is stored at low temperature for a long time by the latent heat and sensible heat of the frozen soil formed on the outer periphery of this space.

In this type of storage device, a device using a heat pipe has been proposed as a means for early forming a frozen soil layer on the outer periphery of a food storage space. One example is disclosed. The low-temperature storage device disclosed in this publication includes a water-impermeable heat-insulating layer provided in the ground, a food storage room provided inside the heat-insulating layer, and However, since food is stored in a storage room provided in the ground, when shipping food stored at low temperature during the winter, However, such a work had to be taken out of the storage room and transferred to a low-temperature truck for transportation and the like, which was very troublesome.

In response to such a problem, the present inventors have
A low-temperature storage device for food that can be transported as it is in a stored state and can be maintained at a low temperature for several days during the transportation period has been developed and has already been filed as Japanese Patent Application No. 3-80365. However, according to the subsequent studies, the low-temperature storage device proposed in this application has the following problems to be improved.

[0005]

That is, the low-temperature food storage device according to the above-mentioned application includes an ice room and a food storage room, which are individually installed and surrounded by a heat insulating material. In the configuration in which the heat exchange pipes of the heat exchanger are arranged from the lower part of the ice compartment to the upper part of the storage chamber, and from the upper part of the ice compartment to the lower part of the storage compartment, the pipes are connected. A bent portion is formed in the groove, and the pressure loss of the cool air flowing through the bent portion becomes large, so that a fan having a relatively large capacity is required. However, adopting such a large-capacity fan not only increases energy consumption, but also a large-capacity fan is generally an AC fan. As a result, there is a problem in that the degree of freedom of the installation location of the storage device is limited.

The present invention has been made in view of such problems, and an object of the present invention is to reduce the pressure loss of a heat exchanger so as to minimize the energy loss, It is an object of the present invention to provide a low-temperature storage device that can store food for a long period of time by using low-temperature winter in the ground.

[0007]

SUMMARY OF THE INVENTION To achieve the above object, the present invention comprises an ice compartment and a food storage compartment which are individually provided with a heat insulating material, and wherein an ice compartment and a food storage compartment are provided between the ice compartment and the food storage compartment. A low-temperature storage device for food provided with a heat exchanger that is detachably mounted on the heat exchanger, wherein the heat exchanger includes a pair of uncurved straight heat exchange pipes that communicate the ice room and the food storage room; A DC driven axial flow fan mounted on each of the exchange pipes, wherein a diameter of the heat exchange pipe is larger than a diameter of the axial flow fan.

[0008] The ice chamber may be provided with a solar cell panel installed on an upper part thereof and a storage battery connected between the solar cell panel and the axial fan.

[0009]

According to the low-temperature food storage device having the above-described structure, the heat exchanger provided between the ice room and the food storage room is a pair of uncurved linear heat exchange passages communicating the ice room and the food storage room. Pipes, and a direct current driven axial flow fan respectively attached to these heat exchange pipes, and the diameter of the heat exchange pipe is configured to be larger than the diameter of the axial flow fan. The pressure loss becomes very small, the flow velocity in the pipe can be reduced while securing the air volume in the pipe, and a DC-driven axial flow fan with little energy loss can be adopted.

In this case, in particular, according to the configuration of claim 2, long-term low-temperature storage of food can be performed without supplying any energy from the outside to the storage device.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 and FIG.
1 shows an embodiment of a low-temperature food storage device according to the present invention. The low-temperature storage device shown in FIG. 1 includes an ice room 10 and a food storage room 12 that are individually installed. The ice compartment 10 and the food storage compartment 12 are connected by a detachable heat exchanger 14 provided between them.

The ice compartment 10 and the food storage compartment 12 are mainly made of a rectangular parallelepiped steel container which can be sealed.
Doors (not shown) are provided at both left and right ends of FIG. 1, respectively. Inside the doors, an internal heat insulating material 15 made of in-situ foamed polyurethane is formed.
Outside the ceiling, an external heat insulating material 16 formed in the same manner as the internal heat insulating material 15 is provided. Drum cans 18 stacked in a stepped manner are housed in the ice chamber 10, and for example, water in which a predetermined amount of salt is dissolved is housed in each of the drum cans 18. This water has a low outside temperature. It turns into ice. In the food storage room 12, for example,
A large number of foods, for example, potatoes, stored in a breathable box or the like are stored.

The heat exchanger 14 includes a pair of straight, non-bent heat exchange pipes 22 and 24 communicating between the ice compartment 10 and the food storage compartment 12, and these heat exchange pipes 22 and 2.
DC-driven axial-flow fans 2 attached to
6, 28, and the heat exchange pipes 22, 24
Is larger than the diameter of the axial fans 26, 28. One of the heat exchange pipes 22 and 24 is provided at an upper side for introducing cool air from the ice chamber 10 to the storage chamber 12, and the other is provided at a lower side for introducing air from the storage chamber 12 to the ice chamber 10. I have.

In the middle of each of the heat exchange pipes 22 and 24, a part thereof is left on the food storage room 12 side, and
A flexible tube 32 for disconnecting from the storage chamber 12;
A manual shutter 32, which is closed when the water in the drum can 18 in the ice chamber 10 is frozen, and a blind flange 34 for taking in outside air are provided, respectively. Has been established.

On the other hand, a storage battery 38 which is a driving source for the axial fans 26 and 28 is installed inside the ice chamber 10. The storage battery 38 has a solar cell panel installed above the ice chamber 10. 40 are connected. In the storage device having the above-described configuration, first, the water contained in the drum can 18 in the ice compartment 10 is frozen, and the cool air in the ice compartment 10 is driven by the axial fans 26 and 28, thereby obtaining the configuration shown in FIG.
Are circulated as indicated by the arrows, and the food stored in the storage room 12 is stored at a low temperature.

At this time, the heat exchanger 20 provided between the ice room 10 and the food storage room 12 is
And a pair of straight heat exchange pipes 22 and 24 that are not bent and communicate with each other, and DC-driven axial flow fans 26 and 28 attached to the heat exchange pipes 22 and 24, respectively. Since the diameter of the exchange pipes 22 and 24 is configured to be larger than the diameter of the axial fans 26 and 28, the pressure loss of the heat exchange pipes 22 and 24 is extremely reduced, and the air volume in the pipes 22 and 24 is reduced. , The flow velocity in the pipe can be reduced, and the DC-driven axial fans 26 and 28 with less energy loss can be adopted.

In this case, in particular, according to the configuration of this embodiment, the storage battery 38 is used as a drive source of the axial fans 26 and 28.
And the solar cell panel 40, it is possible to store food for a long time at low temperature without supplying any energy from the outside to the storage device. The axial fans 26, 28
The solar cell panel 40 is not necessarily required for the driving, and the power consumption of the axial fans 26 and 28 is about 10 watts. Therefore, the solar cell panel 40 can be driven using wind power.

[0018]

As described above in detail in the embodiments,
According to the low-temperature storage device of the present invention, the energy required for long-term low-temperature storage of food is extremely reduced, the storage room can be easily separated from the heat source and transported, and the degree of freedom of the installation location is very large. Become.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a low-temperature storage device according to the present invention.

FIG. 2 is a cross-sectional view of an ice compartment of the storage device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ice room 12 Food storage room 14 Heat exchanger 15 Internal heat insulating material 22, 24 Heat exchange pipe 26, 28 Axial fan 38 Storage battery 40 Solar cell panel

──────────────────────────────────────────────────続 き Continuing from the front page (73) Patent holder 000140982 Magumi Co., Ltd. 2-5-2-8 Kitaaoyama, Minato-ku, Tokyo (72) Inventor Kazuyuki Ouchi 2-1-1 Toranomon, Minato-ku, Tokyo Mitsui OSK Lines Within the Ship Co., Ltd. (72) Inventor Hiroshi Hachinohe 3-3-7 Kita 1 Jo Nishi, Chuo-ku, Sapporo, Hokkaido Inside Obayashi Gumi Sapporo Branch (72) Inventor Shoichi Yokochi 1-chome, Minami 2-Jo Higashi, Chuo-ku, Sapporo, Hokkaido Kanegafuchi Chemical Industry Co., Ltd. Hokkaido Sales Office (72) Inventor Masatoshi Sasaki 1-2-17 Ironai, Otaru, Hokkaido Ohira Industry Co., Ltd. (72) Inventor Akihide Imamura 2-5-8 Kitaaoyama, Minato-ku, Tokyo, Japan (56) References JP-A-4-2922763 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F25D 17/08 301-302 F25D 3/02-3/04 F25D 9/00

Claims (2)

(57) [Claims] 1. A low-temperature food storage device comprising: an ice compartment and a food storage compartment surrounded by individually provided heat insulating materials; and a detachable heat exchanger between the ice compartment and the food storage compartment. The heat exchanger includes a pair of straight, straight heat exchange pipes communicating the ice compartment and the food storage compartment, and a DC-driven axial flow fan attached to each of the heat exchange pipes. And a diameter of the heat exchange pipe is made larger than a diameter of the axial fan. 2. The ice chamber according to claim 1, wherein the ice chamber has a solar cell panel installed on an upper part thereof, and a storage battery connected between the solar cell panel and the axial fan. Food cold storage.