JPH1172281A - Low temperature storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low temperature storage which enables quick uniformization of a cold preservation temperature in a storage as a whole without reducing a housing space. SOLUTION: In a low temperature storage such as a chest freezer, an upper door 3 is provided with a blower 15. The blower 15 sucks cool air of a storage chamber 5 through a suction port 19 provided almost at the center of a duct 17 to be blown out from a blowoff port 21 provided on the perimeter of the duct 17. The blower 15 is driven to rotate while the upper door 3 is closed or it is stopped with the upper door 3 opened.

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 such as a chest freezer for keeping frozen food or the like cool.

[0002]

2. Description of the Related Art In general, in a direct-cooling type low-temperature storage such as a chest freezer having an upper door, a cooling tube as a cooler is built in a storage wall and the inside of the storage is cooled through the storage wall. The circulation of cool air is performed by natural convection. In the low-temperature storage having such a structure, the storage articles closer to the storage wall are gradually cooled, and the storage articles located far from the storage wall, that is, the storage items located in the center of the storage, take time to cool. Conventionally, since the above-mentioned low-temperature storage is intended to keep the articles flowing in a cooled state, it is not necessary to rapidly cool the stored articles.

However, in recent years, for example, frozen beverages in aluminum packs have been used for sale and the like, and in this case, the emergence of a low-temperature refrigerator having a higher cooling speed than the natural convection-type low-temperature refrigerator described above is desired. It has come to be.

[0004] In order to solve such a problem, there has been proposed a low-temperature refrigerator in which a blower storage section is provided at a predetermined position on a storage wall, and a blower is disposed in the blower storage section.

[0005]

However, in a low-temperature refrigerator equipped with a blower on the wall of the refrigerator, when there are many stored articles, the cool air blown out by the blower hits the articles stored in the refrigerator, and the circulation of the cool air is reduced. There is a problem that it takes a long time to be shut off and cooled depending on the position of the stored articles. Further, since the blower protrudes from the storage wall, there is a problem that a storage space for articles is reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a low-temperature refrigerator capable of rapidly uniforming the cooling temperature of the whole refrigerator without reducing the storage space for articles.

[0007]

According to the first aspect of the present invention,
In a direct-cooling type low-temperature refrigerator that has an upper door and cools air in the refrigerator through a refrigerator wall containing a cooling tube, a blower that circulates cool air in the refrigerator is provided at a substantially central portion of the inner surface of the upper door. It is a thing.

In the present invention, since the blower is provided substantially at the center of the inner surface of the upper door, the article is not positioned in the direction of air flow of the blower, and the cool air is circulated without being obstructed by the article. Since the substantially central portion of the inner surface of the upper door is originally a dead space for storing articles, the space for storing articles is not reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the upper door is provided with a duct surrounding the blower, and a substantially central portion of the duct is provided with a suction port for in-compartment air. Is formed around the periphery of the air outlet.

[0010] In the present invention, since the cool air is circulated by being sucked from the suction port substantially at the center of the duct and blown out from the outlet around the duct, the cold air is circulated regardless of the arrangement of the articles in the cold storage. The circulation of the cool air in is effectively performed.

According to a third aspect of the present invention, in the first or second aspect, the blower rotates when the upper door is closed and stops when the upper door is opened.

The blower rotates when the upper door is closed,
Since the upper door stops when the door is opened, the danger that the blower rotates when the door is opened is prevented.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a low-temperature storage according to an embodiment of the present invention. This low-temperature refrigerator 1 is a low-temperature refrigerator main body 2
And an openable and closable upper door 3. Further, a storage room 5 is provided in the low-temperature storage body 2, and a machine room 7 (FIG. 2) is provided below the storage room 5.

As shown in FIG. 2, the upper door 3 is formed by injecting urethane foam between iron plates or the like.
The upper door heat insulating portion 11 enhances the heat insulating effect between the cool air in the storage room 5 and the outside air. A recess 13 is formed substantially at the center of the inner surface (on the side of the storage room 5) of the upper door heat insulating portion 11, and the recess 13 has a cool air circulation blower (hereinafter, referred to as a blower).
It is simply called a blower. ) 15 are provided. A duct 17 is provided on the inner surface of the upper door heat insulating portion 11 so as to surround the blower 15.

At substantially the center of the duct 17, there is provided a suction port 19 formed by a plurality of holes as shown in FIG.
An outlet 21 formed by a plurality of holes is provided around the storage room 5 side of the duct 17. When the blower 15 is driven to rotate, cool air in the storage room 5 is guided into the duct 17 through the suction port 19 and blown out to the storage room 5 through the outlet 21.

An interior light 23 is provided on the inner surface of the duct 17, and the interior light 23 is configured to be turned on when the upper door 3 is open.

A door packing 25 made of an elastic material is provided around the inner surface of the upper door heat insulating portion 11, and this door packing 25 prevents the cold air in the storage room 5 from leaking to the outside when the upper door 3 is closed. Is configured. Reference numeral 27 denotes a switch. The switch 27 includes a reed switch, a bias magnet, and the like, and is configured to detect the open / closed state of the upper door 3 based on a change in magnetic force.

In this embodiment, the power supply to the blower 15 and the interior lamp 23 is controlled based on the information of the switch. Such a switch 27 has an advantage that an operation failure due to aging hardly occurs. In this embodiment, since the blower 15 is provided on the upper door 3, the storage space of the storage room 5 is not reduced as compared with the conventional low-temperature storage in which the blower is provided on the storage wall.

A total of twelve wire baskets 29 can be stored in the storage room 5 of the low-temperature refrigerator main body 2 in two stages as shown in FIG. (Not shown). As shown in FIG. 3, each basket 29 has a rectangular opening frame 31, and both ends of an article receiving portion 33 formed by a plurality of U-shaped wires are spot-welded to the opening frame 31. Each basket 29 has handles 35, 37
The handles 35 and 37 are provided with a plurality of baskets 2.
For example, when the basket 29a shown in FIG. 1 is taken out, the handle 35 of the basket 29a is replaced by the handle 3 of the adjacent basket 29b.
7, the basket 29a can be easily taken out. As shown in FIG. 3, a hooked wire 39 having a hook 39a is spot-welded to the bottom of each basket 29. When the basket 29 is placed on another basket 29 indicated by a two-dot chain line, 4 hooks 3
9a is caught by the opening frame 31 of the other basket 29, so that even if no articles are placed in the lower basket 29, the upper basket 29 is prevented from getting stuck in the lower basket 29.

As shown in FIG. 4, the storage wall 41 forming the storage room 5 is provided with a stainless steel plate 43 and an aluminum foil 4 from the storage room 5 side.
5, heat insulating layer 47 formed of urethane foam or the like, iron plate 49
A plurality of cooling tubes 51 extend horizontally between the stainless steel plate 43 and the aluminum foil 45 at predetermined intervals.

In the cooling tube 51, a refrigerant flows during a cooling operation, and uses the latent heat when the liquid refrigerant changes phase to a gas refrigerant to remove heat from the air in contact with the stainless steel plate 43, and It has a cooling structure. In addition,
The cooling tube 51 does not extend to the storage wall bottom 41a.

As shown in FIG. 2, a condenser 53, a blower 55 for the condenser, and a compressor 57 are provided in the machine room 7 of the low temperature storage main body 2. The condenser 53 and the compressor 57 are connected to the above-mentioned cooling tube 51 via a refrigerant pipe (not shown), and a refrigeration cycle is constituted by these.

Next, the operation of the low-temperature storage 1 according to the present embodiment will be described.

During the cooling operation, the condenser blower 55 is driven to rotate, and the compressor 57 is operated, whereby liquid refrigerant is sent to the cooling tube 51 and cools the air in contact with the storage wall 41 of the storage room 5 to cool the air. Is generated.

A part of the generated cool air moves in the gap between the basket 29 and the adjacent basket 29 as shown by a dotted arrow in FIG. Further, other cool air flows into the basket 29 from the gap between the wires of the basket 29 and moves through the gap in the basket 29 while contacting an article (not shown). These cool airs are finally sucked into the blower 15 through the suction port 19. The cool air sucked into the blower 15 is blown out in the duct 17 in a horizontal direction of 360 degrees, and reaches the position of the outlet 21 and is blown downward through the outlet 21. A part of the cool air blown downward flows into the basket 29 and moves through the gap between the basket 29 and the store wall 41 while being cooled by the store wall 41, and moves to the store wall bottom 41a.

In this embodiment, by circulating the cool air in the storage room 5, the temperature in the storage room 5 is made uniform,
The articles stored in the storage room 5 can be quickly cooled regardless of the positions of the articles.

In the cooling operation state as described above, the storage room 5
When the upper door 3 is opened to take out the articles cooled and stored therein, the switch 27 detects that the upper door 3 is open, and based on this information, the interior lamp 23 is turned on and the blower 15 is opened. Is stopped. Conversely, when the upper door 3 is closed, the switch 27 detects that the upper door 3 is closed, and based on this information, the interior light 23 is turned off and the operation of the blower 15 is started. According to this, when the upper door 3 is opened, the operation of the blower 15 is stopped, so that danger can be prevented and the turbulence of the cold air stored in the storage room 5 is prevented to store the air. The temperature rise in the chamber 5 can be suppressed.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. In the present embodiment, the cool air is sucked from substantially the center of the duct 17 and the cool air is blown out from around the duct 17. However, for example, the cool air may be sucked from around the duct 17 and blown out from the center of the duct 17. Good. In this embodiment, the open / close state of the upper door 3 is detected by a switch 27 including a reed switch that operates based on a change in magnetic force. What detects the open / closed state may be used.

In this embodiment, a plurality of wire cages 2 are used.
9 are arranged side by side in the storage room 5, but the shape of the basket 29 is not limited to the shape of the basket 29,
Any shape can be used as long as it allows cold air circulation.

[0031]

According to the first aspect of the present invention, since the blower is provided substantially at the center of the inner surface of the upper door, the article is not positioned in the direction of air flow of the blower and is not obstructed by the article. The circulation of cool air is performed, and moreover, since the substantially central portion of the inner surface of the upper door is originally a dead space for storing articles, there is an effect that the article storage space is not reduced.

According to the second aspect of the present invention, the cool air is sucked in from the suction port substantially at the center of the duct, and is blown out from the outlet around the duct. The circulation of cool air in the inside is effectively performed.

According to the third aspect of the present invention, since the blower stops when the upper door is opened, the danger that the blower rotates when the door is opened is prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a low-temperature storage according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating an internal structure of a low-temperature storage according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a structure of a basket housed in a low-temperature storage according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a structure inside the storage wall of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature storage 15 Blower 17 Duct 19 Suction port 21 Outlet 27 Switch

Claims (3)

[Claims] 1. A direct-cooling low-temperature refrigerator that has an upper door and cools air in the refrigerator through a refrigerator wall having a built-in cooling tube, and cools the cool air in the refrigerator substantially at the center of the inner surface of the upper door. A low-temperature storage provided with a circulating blower. 2. The air conditioner according to claim 1, wherein a duct surrounding the blower is provided on the upper door, a suction port for air in the refrigerator is formed at a substantially central portion of the duct, and an air outlet is formed around the duct. Item 7. A low-temperature storage according to Item 1. 3. The low-temperature refrigerator according to claim 1, wherein the blower rotates when the upper door is closed, and stops when the upper door is open.