JPH0124550Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mounting structure for a cooler in a type of refrigeration device that circulates cold air, such as a refrigerated case.

(Prior Art) In a cold air circulation type refrigeration system, a cooler is provided in a duct defined between a heat insulating wall constituting a case and a partition plate arranged inside the case, and a cooler is installed at an appropriate position in the duct. An attached blower circulates cool air through the cooler. 3 to 5 show an example of a conventional refrigeration system, in which a cooling chamber 1 is constituted by a heat insulating wall 2, and a cooler 4 is installed between it and a partition plate 3. . The cooler 4 has cooling pipes 4a and fins 4b.
Consists of. In the figure, 5 is a blower for cold air circulation;
6 is a duct defined by the heat insulating wall 2 and the partition plate 3, and 7 indicates the cold air flowing therein. The cold air is cooled by a cooler 4 and sent into the cooling chamber 1,
The heat inside is absorbed and enters the duct 6, where it is circulated. In the conventional structure, as shown in FIGS. 4 and 5, the cooler 4, more precisely, its fins 4b, are mounted in substantially contact with the heat insulating wall 2 and the partition plate 3.

(Problem to be solved by the invention) In the above-mentioned cooler mounting structure, the cooling chamber 1
The moisture in the cooler is carried away with the heat by the circulating cold air and accumulated in the cooler 4, and if frost 8 exceeds a predetermined amount as shown in FIG. It blocks the passageway and obstructs the circulation of cool air, resulting in poor cooling. . Therefore, there were problems in that the circulation of cold air was unstable and that defrosting had to be carried out relatively frequently using an electric heater or the like based on the rate at which frost 8 would accumulate.

The purpose of the present invention is to solve the above-mentioned problems, and therefore, to provide a mounting structure for a cooler in a refrigeration system that can stably circulate cold air and reduce the number of times of defrosting. be.

(Means for Solving Problems) A feature of the present invention is that the cooler 4 is installed at a predetermined distance from the heat insulating wall 2 and the partition plate 3. 4 and partition plate 3
Cool air bypass passages 9a and 9b are formed between them, respectively, and the bypass passage 9a on the heat insulating wall side is connected to the cooler 4.
The lower end of the cooler 4 is closed by a closing plate 10a, and the bypass passage 9b on the partition plate side is closed at the upper end of the cooler 4 by a closing plate 10b.
The cooler 4 is then installed within the duct by means of these closing plates.

(Operation of the means for solving the problem) In the refrigeration system according to the present invention, the cold air flowing in the duct 6 enters the cooler 4 from the front face of the cooler 4 and one bypass 9b at the cooler 4 position. It flows in a roughly S-shape. Therefore, as shown in FIG. 2, even if frost 8 accumulates on the front surface of the cooler 4 and the space between the pipe 4a and the fins 4b at the lower end of the cooler 4 is blocked, the cold air flows through the bypass passage on the partition plate side.
b selectively passes through the midstream and downstream parts of the cooler 4 that are not yet clogged with frost and continues to circulate through the other bypass passage 9a. Therefore, the circulation of cold air is not obstructed.

(Example) Next, an example of the present invention will be described with reference to the drawings. In the present invention, the heat insulating wall 2 and the partition plate 3
A cooler 4 is installed in a duct 6 defined between The container 4 has a heat insulating wall 2 and a partition plate 3
A first bypass passage 9a is formed between the cooler 4 and the insulation wall 2, and a second bypass passage 9b is formed between the cooler 4 and the partition plate 3. ing. Preferably, the distance between the cooler 4 and the insulation wall 2 is equal to the distance between the cooler 4 and the partition plate 3, so that the cross sections of the bypass passages 9a and 9b are equal.

The bypass passage 9a on the side of the heat insulating wall is connected to the cooler 4.
Bypass passage 9b at the lower end of and on the partition plate side
are each closed by a closing plate at the upper end of the cooler 4. If, on the other hand, the bypass passage 9a were closed at the upper end and the bypass passage 9b at the lower end with closing plates, a large amount of air would pass through the bypass passages even in non-frost conditions due to the inertia of the air flow, resulting in a decrease in heat transfer efficiency. The structure does not involve such drawbacks. The cooler 4 is a closing plate 10 for those
a and 10b, it is fixed within the duct 6 between the heat insulating wall 2 and the partition plate 3. Since there are bypass passages on both sides of the cooler 4 in this way, even if frost adheres to the lower end of the cooler 4 as shown in FIG. 2, the flow will continue as shown by the arrows in FIG. Since the cold air enters the cooler 4 from the bypass passage 9b on the partition plate side, the circulation of the cold air is not obstructed.

(Effects of the invention) Therefore, according to the invention, there is very little reduction in heat transfer efficiency when there is no frost, and even if frost forms on the lower end of the cooler and that part is blocked, cold air can be circulated appropriately. Therefore, the circulation of cold air is stable and stable cooling performance can be obtained. In addition, since defrosting only needs to be performed when the bypass passage on the side of the cooler is blocked by frost, the number of times defrosting can be reduced compared to conventional methods, improving cooling performance and saving power. .

Furthermore, since the cooler is fixed by the closing plate, the mounting structure is simplified, contributing to cost savings.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an example of the mounting structure of a cooler of a refrigeration system according to the present invention, Fig. 2 is a cross-sectional view showing a state in which the cooler installed according to the present invention is covered with frost, and Fig. 3 is a sectional view showing the overall structure of a conventional refrigeration system, FIG. 4 is a sectional view showing the mounting structure of a conventional cooler, and FIG. FIG. In the figure, 2... heat insulating wall, 3... partition plate, 4... cooler, 6... duct, 9a, 9b... bypass passage, 10a, 10b... closing plate.

Claims (1)

[Scope of utility model registration request] In a cold air circulation type refrigeration device that includes a cooler in a duct defined between an insulating wall that constitutes a case and a partition plate inside the duct, there is a space between the cooler and the insulating wall and between the cooler and the insulating wall. The cooler is installed away from the heat insulating wall and the partition plate so as to form cold air bypass passages between the cooler and the partition plate, and the bypass passage on the heat insulating wall side is located at the lower end of the cooler and at the lower end of the cooler. A cooler for a refrigeration system, characterized in that the bypass passages on the partition plate side are each closed by a closing plate at an upper end of the cooler, and the cooler is fixed in the duct by the closing plates. Mounting structure.