JPH0448466Y2 - - Google Patents

Description

[Detailed description of the invention] a. Industrial application field The present invention relates to the duct structure of a cooling storage, and in particular, it circulates cold air so as to uniformly cool the entire interior of the storage, and by providing fins on the duct body, the entire interior of the storage is improved. It relates to novel improvements to improve cooling efficiency.

b. Prior art The duct structure of this type of cooling storage that has been used in the past has not been disclosed in any literature such as gazettes, and the structure shown in FIGS. 5, 6, and 7 is indicates a conventional product manufactured in-house by the applicant.

That is, what is indicated by the reference numeral 1 in the figure is a heat insulating box which has a substantially box shape as a whole and is composed of an inner box 1a, an outer box 1b and a heat insulating material 1c. , an internal fan 2 is provided, and a cooler 3 is installed adjacent to the internal fan 2.

An opening 1 formed on the front side of the heat insulating box 1
d, a plurality of door bodies 5 are provided in upper and lower stages in a manner that can be freely opened and closed, centering on a frame duct 4 arranged in the horizontal direction.

Further, in the lower position of the cooler 3 in the front side insulation box 1, a ceiling duct part 6a, a door duct part 6b, a bottom duct part 6c, and a rear duct part 6 are provided.
A duct body 6 consisting of d is arranged.

The ceiling duct section 6a is arranged with almost no gap between it and the cooler 3, and an air outlet 7 is provided at the end of the ceiling duct section 6a for sending cold air downward. is provided.

The door duct portion 6b has a large number of small holes 6 for blowing air.
bA and a small suction hole 6bA', and is integrally attached to the back surface of each door body 5.
When the frame duct 4 opens and closes, it opens and closes together with the door body 5, and each door duct part 6b is connected by the frame duct 4.

A suction port 9 is formed at one end of the bottom duct portion 6c provided on the bottom portion 8 of the heat insulating box 1, and this suction port 9 is provided corresponding to the lower end 6bB of the door duct portion 6b. .

The rear duct section 6d is connected to the ceiling duct section 6.
a, and the cooler 3
A drain tray 10 integrally provided on the lower surface of the insulating box 1 is connected to a drain pipe 11 disposed within the rear wall 1e of the heat insulating box 1.

The conventional cooling storage duct structure is configured as described above, and its operation will be described below.

The cold air supplied by the internal fan 2 is returned to the internal fan 2 from the outlet 7 through the door duct 6b, the bottom duct 6c, and the rear duct 6d, and is returned to the internal fan 2 through the small holes 6bA to 6bA'. After that, inside the warehouse 12
Cool air is circulated inside.

c Problems to be solved by the invention Since the duct structure of the conventional cooling storage is configured as described above, it is not possible to simply supply cold air to the inside of the storage 12 from the plurality of small holes 6bA of the door duct part 6b. , as shown in FIG.
There was almost no convection in the container 2a and the lower part 12b, and the temperature difference in the refrigerator interior 12 became significant, reducing the freshness of some foods. Furthermore, the temperature rise due to the opening and closing of the door body 5 can be suppressed by the air curtain effect, but if the frequency of opening and closing increases or if the outside air is high temperature, the temperature inside the refrigerator 12 will rise rapidly, causing food to deteriorate. Freshness sometimes deteriorated.

Furthermore, if the air volume of the internal fan 2 is increased, the circulating air volume in the internal chamber 12 increases, and it becomes possible to uniformly cool the entire internal chamber 12, but in that case,
Due to the increase in air volume, the food in the refrigerator interior 12 would become abnormally dry, making it impossible to put it into practical use.

Moreover, the cold air circulation passage 1 formed in the duct body 6
The interior of No. 3 had only a cavity, and no measures were taken to improve thermal efficiency, so the cooling efficiency was not sufficient.

This invention not only quickly solves the above problems, but also efficiently equalizes the cooling temperature inside the refrigerator by using the same air volume (light breeze) as before, and reduces the temperature inside the refrigerator as the door opens and closes. The purpose of the present invention is to obtain a duct structure for a cooling storage that can prevent rising.

d Means for solving the problem The duct structure of the cooling storage according to the present invention includes a cooler installed at an upper position inside the heat insulating box, an internal fan installed adjacent to the cooler, and a cooling storage A duct body consisting of a ceiling duct part, a door duct part having a plurality of small holes, a bottom duct part, and a rear duct part disposed below the container, and a plurality of duct parts formed on the inner surface of the duct body. The structure includes fins.

e Effect In the duct structure of the cooling storage according to the present invention, the cold air cooled by the cooler circulates within the duct body, and the heat transfer of the cold air is made highly efficient by the fins formed in close contact with the duct body. The entire duct body has a cooling effect similar to that of a cooler, eliminating temperature differences throughout the refrigerator, ensuring sufficient cooling to the rear and bottom of the refrigerator, and constantly cooling food at a constant temperature. It can be performed.

f. Embodiment Hereinafter, a preferred embodiment of the duct structure of the cooling storage according to the present invention will be described with reference to the drawings.

Note that the same or equivalent parts as in the conventional example will be described with the same reference numerals.

Figures 1 to 5 are for showing the duct structure of the cooling storage according to the present invention. It is a heat insulating box body consisting of a box 1b and a heat insulating material 1c, and an internal fan 2 is provided at an upper position within this heat insulating box body 1, and a cooler 3 is attached to a position adjacent to this internal fan 2. ing.

An opening 1 formed on the front side of the heat insulating box 1
d is provided with a plurality of door bodies 5 having a horizontally arranged frame duct 4 as the center and having a vertically two-stage structure and each of which can be opened and closed on the left and right sides.

Further, in the lower position of the cooler 3 in the heat insulating box 1, a ceiling duct part 6a, a door duct part 6b, a bottom duct part 6c, and a rear duct part 6d are provided.
A duct body 6 consisting of the following is disposed and forms a cold air circulation passage 13.

In the duct body 6, a plurality of fins 6e are provided in close contact with the inner surfaces of the door duct portion 6b and the rear duct portion 6d.

As shown in the drawing, each of these fins 6e is provided substantially vertically along the longitudinal direction of the heat insulating box 1, and when viewed from above, the door duct portion 6
Each fin 6 is provided on the inner surface of the rear duct portion 6d.
A plurality of grooves 6eA are formed by e, and these grooves 6eA are located within the cold air circulation passage 13.

Furthermore, each of these fins 6e is made of a material with extremely good thermal conductivity such as copper, and has high efficiency so that the entire duct body 6 functions as a cooler by each of these fins 6e. It has a heat transfer efficiency of

An air outlet 7 is provided on the front side of the ceiling duct portion 6a.
is provided, and the cold air blown out from this outlet 7 is sent to the door duct part 6b.
The air outlet 7 and the door duct portion 6b are in communication.

The door duct part 6b is provided with a large number of small holes 6bA for blowing out cold air and small holes 6bA' for suction. is formed in the lower door duct portion 6b. Each door duct part 6b is integrally attached to the back surface of each door body 5, and when each door body 5 is operated to open or close, it moves to open and close together, and when it is in the closed state, each Door duct part 6b
is a frame duct 4 provided at an intermediate position of each door body 5.
The configuration is such that they are connected to each other by.

A suction port 9 is formed on the front side of the bottom duct portion 6c provided on the bottom portion 8 of the heat insulating box 1,
This suction port 9 is provided corresponding to the lower end 6bB of the door duct portion 6b. Therefore, the configuration is such that the cold air blown out from the lower end 6bB is sucked into the suction port 9.

Furthermore, the rear duct portion 6d is integrally connected to the rear end of a drain tray 10 that is integrally provided on the lower surface of the cooler 3, and this drain tray 10 is installed in the rear wall 1e of the heat insulating box 1. It is connected to a drain pipe 11 provided therein.

The duct structure of the cooling storage according to the present invention is constructed as described above, and its operation will be described below.

The cold air cooled by the cooler 3 is blown out from the suction port 7, passes through the door duct part 6b and the frame duct 4,
Furthermore, it returns from the suction port 9 to the ceiling duct part 6a via the bottom duct part 6c and the rear duct part 6d,
Cold air circulation within the duct body 6 begins.

In addition, in the above-mentioned cold air circulation operation, the air outlet 7
Each door duct part 6b of each door body 5
Since the cold air flows downward inside the air, when any of the door bodies 5 is opened, the cold air from the air outlet 7 flows down the same passage as shown by the arrow.
It acts as an air curtain, and can prevent a temperature rise due to outside air entering the refrigerator interior 12.

Furthermore, the cold air passing through each of the door duct sections 6b circulates through a large number of small holes 6bA and 6bA' formed on the inner surface of each door duct section 6b, as shown by solid lines in FIG. 2. That is, the cool breeze blown out from each small hole 6bA of the upper door duct part 6b passes through the inside 12 of the refrigerator and is sucked into each small hole 6bA' of the lower door duct part 6b, thereby cooling the inside 12 of the refrigerator. .

In addition, the cold air circulation in the refrigerator interior 12 described above is carried out by the second
If the cold air is circulated as shown by the solid line arrow in the figure, stagnation occurs at the rear and bottom side of the refrigerator interior 12 and a temperature difference occurs, but as described above, each door duct part 6b Rear duct part 6
The fins 6e provided in d are connected to the cold air circulation passage 13.
It is cooled by heat exchange with the cold air passing through the fins 6e, and is also conducted to each door duct part 6b and rear duct part 6d that are closely connected to the fin 6e.
b and the rear duct portion 6d as a whole function similarly to a cooler, a synergistic cooling effect is obtained as shown by the dotted line arrow in FIG. 2, and the entire interior 12 of the refrigerator is evenly cooled.

The configuration of each fin 6e described above is an example, and its shape is not limited to the structure described above, and the shape may be changed in various ways as long as the cooling effect described above can be obtained. It goes without saying that this can be done.

g. Effects of the invention Since the duct structure of the cooling storage according to the invention is configured as described above, it is possible to obtain the following various effects.

(1) The fins installed inside the duct are sufficiently cooled by heat exchange with the cold air constantly circulating inside the duct, and the heat conduction of the cooled fins allows the entire duct to function as a cooler. Since they act in the same way, there is no difference in temperature throughout the refrigerator, and all the foods in the refrigerator can be cooled at a constant temperature.

Therefore, it is possible to prevent abnormal drying and deterioration of freshness of foods in the conventional configuration.

(2) In addition, even when the door body is opened and closed frequently or the outside temperature rises, the cold air curtain effect due to the circulating cold air on the back side of the door body and the efficient cooling effect of the aforementioned fins will keep the system cool. Since the temperature inside the refrigerator is sufficiently stable, a sudden rise in temperature can be prevented.

[Brief explanation of the drawing]

Figures 1 to 4 are for showing the duct structure of the cooling storage according to the present invention. Figure 1 is a sectional view showing the overall structure, Figure 2 is a sectional view showing the convection state of cold air, Figure 3 is a plan sectional view of Figure 1, and Figure 4 is a cross-sectional plan view of Figure 1.
The figure is an enlarged perspective view showing the main parts of Figure 1, Figures 5 to 7 are for showing the dust structure of a conventional cooling storage, Figure 5 is a sectional view, and Figure 6 is a cold air FIG. 7 is a plan sectional view of FIG. 5. 1 is an insulated box, 2 is an internal fan, 3 is a cooler,
5 is a door body, 6 is a duct body, 6a is a ceiling duct part,
6b is the door duct part, 6bA and 6bA' are small holes,
6c is the bottom duct part, 6d is the rear duct part, 6e
is the fin, and 6eA is the groove.

Claims (1)

[Claims for Utility Model Registration] (1) A cooler 3 provided at an upper position within the heat insulating box 1, an internal fan 2 provided adjacent to the cooler 3, and A duct body 6 comprising a ceiling duct part 6a disposed at a lower position, a door duct part 6b having a plurality of small holes 6bA and 6bA', a bottom duct part 6c, and a rear duct 6d; A duct structure for a cooling storage, comprising a plurality of fins 6e formed on an inner surface, and guiding cold air through each of the fins 6e. (2) The duct structure for a cooling storage according to claim 1, wherein the fins 6e are formed in a substantially vertical direction. (3) The fin 6e is provided in the door duct part 6b and the rear duct part 6d.
Duct structure of the cooling storage described in section. (4) The cooling storage according to any one of claims 1 to 3, wherein the fins 6e and the duct body 6 are made of a material with good thermal conductivity. Duct structure. (5) A utility model according to any one of claims 1 to 4, characterized in that a plurality of grooves 6eA are formed in the duct body 6 by the fins 6e. cooling storage duct structure.