JPH031073A - Refrigerator - Google Patents

Abstract

PURPOSE:To shorten a time necessary for cooling a receiving box to a set temperature by a method wherein the receiving box is cooled by cold air, cooled at the inside upper part of a heat insulating box body, upon both times when the cold air is descended through a passage, defined between the heat insulating box body and the receiving box, and the cold air in ascended through the same passage. CONSTITUTION:Cold air, sent from a cooler 28 into a back passage 36, collides against a middle partitioning 42 and is sent into the upper passage 40a of a horizontal passage 40, then, is passed from the tip end of the middle partitioning 42 through a lower passage 40b and, thereafter, flows into the back passage 36 again. The cold air, flowing through the back passage 36, is made to flow through the horizontal passage 40 whereby the cold air can be contacted with the bottom surface of an upper receiving box 22 and the ceiling surface of a lower receiving box 24 and, therefore, cooling of both receiving boxes 22, 24 may be promoted. The cold air flows down through the back passage 36 and, thereafter, is sent into a bottom space 44, defined at the bottom surface of the lower receiving box 26, then, is returned to the cooler 28 after ascending through side passages 46, 46.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a refrigerator in which a storage box is disposed with a required space inside a heat insulating box body, in which the storage box can be cooled uniformly. be.

Prior Art When storing fresh foods such as vegetables, fruits, fish, etc. (hereinafter referred to as 1 ingredient) in a refrigerator for a long period of time, or gradually thawing frozen ingredients, it is common to It is necessary to keep temperature changes to a minimum and to control the evaporation of moisture from foodstuffs.

Refrigerators that use brine (antifreeze) as a cooling medium are known to meet this demand.

This system cools the brine stored in the brine tank with an evaporator connected to the refrigeration system, and circulates the cooled brine through a cooling pipe installed outside the food storage box. It performs cooling.

However, the above-mentioned refrigerator using brine has a drawback that the brine cooling mechanism, piping, etc. are complicated, which increases manufacturing costs. Furthermore, in order to perform defrosting operation in this refrigerator, it is necessary to warm the brine to a predetermined temperature and circulate it through the cooling pipe. In this case, not only is a large amount of heat required to warm the brine, but also the circulation of the brine causes the internal temperature to rise more than necessary, causing a serious problem in that the freshness of the stored foodstuffs decreases.

Therefore, as a solution to the above-mentioned problems, there is, for example, a device for preserving fresh foods disclosed in Japanese Utility Model Application Publication No. 147678/1983. This device includes a storage box for storing foodstuffs inside a storage chamber with a heat-insulating structure, with a required space interposed therebetween. Further, the space is formed by horizontal partition plates and vertical partition plates, and includes an air passage on the casing side that allows cold air to circulate without coming into contact with the storage box, and an air passage on the storage box side that allows cold air to circulate while coming into contact with the storage box. It is defined in Then, the cold air cooled by the evaporator installed in the air passage on the casing side first flows down the ☆ air passage on the casing side and drops to the bottom of the storage chamber, and then rises through the air passage on the storage box side. By exchanging heat with the storage box,
The storage box is configured to be cooled.

Problems to be Solved by the Invention The above-described fresh food storage device is configured so that the cooled air is lowered to the bottom of the storage chamber and then the storage box is cooled as the cooled air rises.

But once the cold air is allowed to descend to the bottom of the storage room.

This cold air does not rise and accumulates, and only the lower part of the storage box is cooled, making it difficult to uniformly cool the entire storage box. For this reason, it takes a considerable amount of time to cool the inside of the refrigerator until it reaches the set temperature (food storage temperature), which has the drawback of increasing power consumption.

Furthermore, there is also the problem that the partial cooling of the storage box causes a temperature difference within the warehouse, causing the food in the negative part to quickly lose its freshness.

In addition, in models where multiple storage boxes are arranged in a vertical relationship in the storage chamber, the internal temperature becomes uneven between the upper and lower storage boxes, and in particular, due to insufficient cooling of the upper storage box, It has also been pointed out that food stored in storage boxes loses its freshness.

Purpose of the Invention The present invention provides a two-dimensional structure in which a storage box is provided inside the above-mentioned heat insulating cylinder.
In view of the above-mentioned disadvantages inherent in refrigerators with a heavy structure, this was proposed to suitably solve this problem, and it is possible to quickly cool the inside of the refrigerator to the set temperature, and also to reduce the temperature of the refrigerator. It is an object of the present invention to provide a refrigerator with a simple configuration that can achieve uniform internal temperature.

I! Means for Solving the Problems In order to overcome the above-mentioned problems and suitably achieve the intended purpose, the present invention provides a heat insulating box body including an opening and a heat insulating door provided in the opening, and a heat insulating box body having In the refrigerator, the refrigerator comprises a storage box which is disposed with a required space therein and has an opening that opens corresponding to the opening, and a cooler provided on the upper part of the storage box in the heat insulating box body. a first passage that communicates the internal space of the insulating box with the cold air blowing side of the cooler and guides the cold air blown out from the cooler to cool the storage box while descending; and the cold air of the cooler. A second passage is formed in communication with the suction side to raise the cold air that has descended to the bottom of the heat insulating box, cool the storage box, and guide it back to the cooler.

Embodiments Next, preferred embodiments of the refrigerator according to the present invention will be described below with reference to the accompanying drawings. Figure 1 shows
A partially vertical perspective view showing a vertical refrigerator according to a preferred embodiment of the present invention, FIG. 2 is a vertical cross-sectional side view of the refrigerator shown in FIG. 1, and FIG. 3 is a vertical cross-sectional front view of the refrigerator shown in FIG. 1. It is a diagram. In addition, in the embodiment, a refrigerator in which two storage boxes are disposed vertically within the heat insulating box body will be described, but the present invention is not limited to this, and the number of storage boxes may be one or more than two. It may be.

As shown in the drawings, the refrigerator 10 has rectangular openings 12a, 12a that are spaced apart from each other by a predetermined distance on the top and bottom and open wide to the front side.
The outer box 12 has an outer box 12, the inner box 14 is built into the outer box 12 with a required gap, and also has a large opening on the front side, and the insulation made of urethane foam or the like is filled between the two I12 and 14. It has a heat insulating box body 18 made of a material 16.

Inside the inner box 14 of this heat insulating box body 18, an upper storage box 22 and a lower storage box 24 are stacked on each other with an inner wall and a required space 20 interposed therebetween, with partitions 42° 42 to be described later in between. It is arranged. The storage boxes 22 and 24 are made of a metal plate with good thermal conductivity, such as stainless steel.

As shown in FIG. 3, on the inner bottom surface of the inner box 14, a support member 19 that protrudes from the bottom surface by a predetermined height is disposed at the center in the width direction.
is placed thereon, and a bottom space 44 is defined between the lower storage box 24 and the bottom surface of the inner box 14. Further, as shown in FIG. 4, a storage box guide 34 formed in the shape of an opening that opens forward in a plane extends in the vertical direction on the inside back surface of the inner box 14, and the opening of this guide 34 has both sides. The back parts of the storage boxes 22 and 24 are fitted.

As will be described later, between the back surface of the storage box 22, 24 and the inner surface of the storage box guide 34, a storage fi
A back passageway 36 is defined which serves as a first passageway for guiding the cooling of 22,24.

Further, the width dimensions of the storage boxes 22 and 24 are set smaller than the internal dimensions of the inner box 14, so that, as shown in FIG.

A side passageway 46° 46 is defined which functions as a second passageway for guiding the cool air to rise and cool the storage boxes 22, 24. That is, the inner wall of the inner box 14 and both storage boxes 2
The space 20 defined between the outer wall of 2.24 and the rear passage 36. Bottom space 44. It is composed of side passages 46 and 46.

Both storage boxes 22 and 24 have rectangular openings 22a and 24a that open toward the front, corresponding to the rectangular openings 12a and 12a formed in the heat insulating box body 18. Further, as shown in FIG. 2, on the front surface of the heat insulating box 18, in correspondence with each opening 12a formed in the heat insulating box 18, a heat insulating door 26 is arranged to open and close the opening 12a. It is set up.

As shown in FIG.
A cooler 28 is defined into two chambers 37 and 39 via the refrigeration system, and one chamber 37 that communicates with the back passage 36 communicates with a refrigeration system (not shown) and circulates refrigerant from the refrigeration system to a built-in evaporator. is installed. Further, the other chamber 39 communicates with the side passage 46.46, and this chamber 39 has a picture wall 30.
Blow fans 32 are disposed corresponding to a plurality of openings 30a (two in the embodiment) opened in the openings 30a. This blower fan 32 is arranged to blow air in the direction of the chamber 37, so by driving the blower fan 32, the air inside the refrigerator sucked from the side passages 46 and 46 is transferred to the opening 37.
After contacting the cooler 28 via a and being turned into cold air, the air is blown out into the back passage 36.

Note that the reference numeral 33 indicates a drain tray disposed below the cooler 28, and water droplets dripping from the cooler 28 are discharged through the drain tray 33 to the outside of the machine.

As shown in FIG. 3, the upper storage box 22 and the lower storage box 24 are stacked with U-shaped shielding plates 38 and 38 disposed oppositely on both left and right edges, and both shielding plates 38.
38 serves to define a horizontal passageway 40 of the required dimensions between the storage ff122.24.

The shielding plate 38 extends over the entire length in the depth direction of the storage [22]. As described later, from the back passage 36 to the horizontal passage 4
It also has the function of preventing the cold air introduced into the tube from escaping into the side passages 46°46.

Note that the front side of the horizontal passage 40 is also closed, and the passage 40 communicates only with the rear passage 36 on the rear side.

As shown in FIG. 2, a partition 42 is provided at a position of the storage box guide 34 facing the horizontal passage 40 to divide the horizontal passage 40 into two vertically.

The dimensions of this partition 42 are such that both sides thereof abut against the shielding plate 38.
A and the lower passage 40b are set to be provided with a gap of a required size to communicate with each other. Therefore.

The cold air blown out from the cooler 28 to the back passage 36 is
The upper passage 40a of the horizontal passage 40 collides with the partition 42
from the tip of the partition 42 to the lower passage 40
After passing through b, the cold air flows into the back passage 36 again.By circulating the cold air flowing through the rear passage 36 through the horizontal passage 40, the cold air is distributed between the bottom surface of the upper storage box 22 and the ceiling surface of the lower storage box 24. 1 car storage box 2 because it can come into contact with
2.24 cooling can be accelerated.

Note that the cold air that has passed through the lower passage 40b and flowed into the back passage 36 again flows down the rear passage 36 and is then blown out into the bottom space 44 defined at the bottom of the lower storage box 26, as shown in FIG. After that, it is configured to ascend the side passage 46, 46 and return to the cooler 28.

Next, Figure 5 shows a modification of the embodiment,
A heat insulating material 48 is disposed over the entire bottom surface of each of the storage boxes 22 and 24. In this case, the back passage 3
Since the cold air flowing into the upper passage 40a of the horizontal passage 40 from 6 does not directly contact the bottom surface of the storage box 22, the storage box 22 is not cooled by the cold air.
The storage box 24 is not cooled by the cold air flowing into the bottom space from the storage box 6. Therefore, the storage box 22, 24 is cooled only from the ceiling surface, back surface, and side surface.

That is, since cold air has the property of flowing from above to below, when the storage box 22 (24) is cooled from the ceiling surface, back surface, and side surface, the air inside the refrigerator will descend and accumulate in the lower part. At this time, since cooling is not performed from the bottom of the storage box 22 (24), it is possible to effectively prevent the lower part of the storage box 22 (24) from being overcooled.

Furthermore, FIGS. 6 and 7 show another embodiment of the present invention, in which a side passage 46 defined on the side of the storage box 22, 24 is divided into two passages 46a, 46b, one of which is divided into two passages 46a, 46b. The structure is such that a part of the cold air flowing down the back passage 36 is introduced into the passage 46a.

As shown in FIG. 7, at a predetermined position of the side passage 46.46 formed on the side surface of the storage box 22.24,
Crank-shaped defining members 50 and 50 are closely disposed on the inner wall of the inner box 14 and the outer wall of the storage boxes 22 and 24, respectively. This defining material 50 extends over the entire length of the side passageway 46 in the height direction, and divides the passageway 46 into two passageways 46a.

46b. Further, the height dimension of the storage box guide 34 disposed on the inner back side of the inner box 14 is as follows:
As shown in FIG. 6, the upper end is set to be lower than the ceiling surface of the upper storage box 22.

Therefore, a part of the cold air blown from the cooler 28 into the back passage 36 flows from the upper part of the storage box guide 34 into one passage 46b in the side passage 46, and
flowing down b. The two passages 46a and 46b separated by the dividing material 50 communicate with each other through the bottom space 46 defined on the bottom surface of the lower storage box 24, so that the passage 46
The cold air flowing down the passage 46a flows into the passage 46a.
6a and return to the cooler 28 is repeated. That is, by bringing some of the cold air blown out and descending from the cooler 28 into contact with the side surfaces of the storage boxes 22 and 24, heat exchange efficiency can be improved, and the inside of the refrigerator can be cooled down to the set temperature in a short time. obtain.

Effects of the Embodiment According to the refrigerator according to the embodiment configured as described above, when the refrigerator is operated, the air inside the refrigerator on the side passage 46° 46 side is sucked by the air blowing fan 32 and becomes as shown in the picture Q30. After being fed into the cooler 28 through the opening 30a and cooled there by heat exchange.

It is blown out into the back passage 36. Note that a part of the cold air blown out from the cooler 28 circulates through a passage defined between the drain tray 33 and the ceiling surface of the upper storage box 22 to cool the ceiling surface of the storage box 22. Perform a so-called short cycle.

As shown in FIG. 2, the cold air blown into the back passage 36 contacts the back surface of the upper storage box 22 and flows down while exchanging heat, until it collides with the partition 42 and the flow is deflected. Ru. This cold air flows through the horizontal passage 4 along the partition 42.
After flowing through the upper passage 40a of 0, it flows through the lower passage 40b and flows into the back passage 36 below the inner partition 42.
At this time, the cold air comes into contact with the bottom surface of the upper storage box 22 and the ceiling surface of the lower storage box 24 to perform heat exchange, and the 1-car storage box 2
2 and 24 are cooled.

The cold air that has flowed into the back passage 36 again comes into contact with the back surface of the lower storage box 24 and flows down while exchanging heat.
The air is blown out into the bottom space 44.

Here, the bottom of the storage box 24 is touched. Furthermore, as the cold air ascends through the side passages 46, 46, it passes through both storage boxes 22.
After cooling the storage box 22° 24 by contacting both sides of the storage box 24, the storage box 22 returns to the cooler 28, and the cycle is repeated. Note that the cold air blown into the bottom space 44 is transferred to the upper and lower storage boxes 22.
24, the cold air does not accumulate at the bottom of the heat insulating box 18, and the cold air circulates efficiently.

In this way, since each storage box 22.24 is configured to be cooled both when the cold air cooled by the cooler 28 is lowered and when it is raised, the inside of each storage box 22.24 is kept at the set temperature. can be rapidly cooled down to Moreover, since cold air does not accumulate at the bottom of the insulating box body 18, each storage box 22.2
4 can be equally cooled. In addition, upper storage box 2
Since cold air circulates between the bottom surface of the storage box 2 and the ceiling surface of the lower storage box 24, there is also the advantage that cooling efficiency can be improved. Furthermore, by circulating cold air from the back side to the side side of the storage box 22.24, the opening 22a of the storage box 22.24,
It is possible to effectively prevent water droplets from forming near 24a due to the influence of outside air.

In the embodiment shown in FIG.
6, 46 → By circulating as in the cooler 28,
Although the storage boxes 22 and 24 are configured to be cooled, conversely, the cold air cooled by the cooler 28 is transferred to the side passages 46, 46→
Similarly, the storage boxes 22 and 24 can be quickly cooled by circulating the liquid from the bottom space 44 to the back passage 36 to the cooler 28.

As described in detail, according to the refrigerator according to the present invention, ``when the cold air cooled above the inside of the insulating box is moved down through the passage defined between the insulating box and the storage box; Since the storage box is configured to be cooled both when the storage box is raised and when the storage box is raised, the time required to cool the storage box to the set temperature can be shortened, and running costs can be reduced. Furthermore, since the cold air does not cool only the bottom of the storage box, the entire storage box can be uniformly cooled, and there is also an advantage that deterioration in the freshness of the food stored in the storage box can be effectively prevented.

[Brief explanation of drawings]

FIG. 1 is a partially vertical perspective view of a vertical refrigerator according to a preferred embodiment of the present invention, FIG. 2 is a longitudinal side view of the refrigerator shown in FIG. 1, and FIG. 3 is a vertical side view of the refrigerator shown in FIG. vertical front view of the refrigerator,
FIG. 4 is a cross-sectional plan view of the refrigerator shown in FIG. 1, FIG. 5 is a vertical cross-sectional side view showing a modification of the refrigerator according to the embodiment, and FIG. 6 is a partially longitudinal cross-sectional view of another embodiment of the refrigerator according to the present invention. FIG. FIG. 7 is a cross-sectional view of the refrigerator shown in FIG. 6. 12a...Opening 20...Space 22a...Opening 24a...Opening 28...Cooler 46...Side passage

Claims (1)

[Scope of Claims] [1] A heat insulating box (18) comprising an opening (12a) and a heat insulating door (26) provided in the opening (12a), and a heat insulating box (18) having the necessary materials inside the heat insulating box (18). a storage box (22) disposed through a space (20) and having an opening (22a) that opens corresponding to the opening (12a); and a storage box (22) in the insulation box body (18). In the refrigerator, the inner space (20) of the insulating box (18) is connected to the cooler (28).
a first passage (36) that communicates with the cold air blowing side of the cooler (28) and guides the cold air blown out from the cooler (28) to cool the storage box (22) while lowering the cold air; 2
The storage box (22) is connected to the cold air suction side of 8) and raises the cold air that has descended to the bottom of the insulation box (18).
the second cooling and guiding it back to the cooler (28)
A refrigerator characterized in that a passageway (46, 46) is defined. [2] The first passage and the second passage are the storage box (22).
2. The refrigerator according to claim 1, wherein the first passage is defined on the back side of the storage box (22) and the second passage is defined on the side side of the storage box (22). [3] The first passage and the second passage are the storage box (22).
2. The refrigerator according to claim 1, wherein the first passage is defined on the side surface of the storage box (22) and the second passage is defined on the back side of the storage box (22). [4] The refrigerator according to claim 1, 2 or 3, wherein a heat insulating material (48) is attached to the bottom of the storage box (22).