JPS5818625Y2 - Air intake section of frozen or refrigerated open showcase - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of the air suction section of a freezer or refrigerated open showcase that forms an air curtain in a large open section on the front to partition the inside and outside of the refrigerator.

Generally, in this type of refrigeration or refrigerated open showcase, frost forms on the inlet of the air passage in which the cooler is installed, the inner wall of the air passage near the inlet, and the frost spreads from the inlet to the air passage. The disadvantage is that it obstructs the flow of incoming air.

This kind of frost formation occurs because as soon as the air passes through the intake port and enters the air passage where the cooler is placed, it is rapidly cooled and the water vapor contained in the air becomes supersaturated. This is because ice forms in the air intake section mentioned above.

The purpose of the present invention is to effectively reduce frost formation on the air suction part as described above, and embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows an example of a frozen or refrigerated open showcase to which the present invention can be applied.

As shown in the figure, this showcase has a cooler 2 and a blower means 3 arranged in the first air passage to cool the air sucked in from the inner suction port 4 at the bottom and blow it out from the inner air outlet 5 at the top. In addition, a blowing means 7 is disposed in the second air passage 6 so that the air sucked in from the lower outer suction port 8 is blown out directly from the upper outer blow-off port 9, and the air is further blown out from the inner blow-off port 5. A common rectifying device 10 is installed across the outer air outlet 9, thereby forming a good two-layer air curtain C1, C2 in the large open portion 11 at the front.

Also, most of the air that formed the inner air curtain C□ enters the inner intake port 4, and most of the air that formed the outer air curtain C2 enters the outer intake port 8, so that the air is circulated as much as possible. It has become.

The interior 12 of the refrigerator is cooled and kept cold by the inner air curtain C1, and the inner air curtain C1 is protected by the outer air curtain C2.

Here, as the cooler 2, an evaporator portion of a device that repeatedly condenses and evaporates a refrigerant is usually used.

In addition, 13 is an article display shelf.

An embodiment in which the present invention is applied to such an open showcase is shown in FIG. 2, only the portion corresponding to the air intake section A in FIG. 1.

3 shows an enlarged view of the main part of FIG. 2, and FIG. 4 shows the state in which the heater 22 is attached to the heat sink 21 in FIGS. 2 and 3.

As is clear from FIGS. 2 to 4, the air intake section of this embodiment is located on the inner wall of the air path 1 near the inlet 4 of the air path 1 where the cooler (2 in FIG. 1) is arranged. Two heat sinks 21 are provided, one end 21 a of which is attached so as to block a part of the air passage 1, and the other end of which is a bent portion 21 b facing the inlet 4 side. It has a structure in which one heater 21 is mounted at small intervals on the side surface.

With this structure, the heat sink 21 having the bent portion 21 b
temporarily captures and heats the air from the suction port 4, and effectively imparts radiant heat to the suction port 4 and the inner wall of the air passage 1 near the suction port 4. Frost formation on the inner walls of 1 can be significantly reduced.

Further, the heat dissipating plate 21 having the bent portion 21 b can effectively capture frost particles that have separated from the suction port 4 or the inner wall of the air passage 1 near the suction port 4 and melt them by heating.

21 a in FIGS. 3 and 4 is the bent portion 21 b
This is a portion for attaching the heat sink 21 to the inner wall of the air passage 1, which is formed by bending one end of the heat sink 21 in the same manner as in the above.

The heat sink 21 is made of a material with high thermal conductivity such as metal, and the heater 22 is made of, for example, a nichrome wire coated with vinyl.

In addition, in Fig. 2, 14 is a front cap, and 15 is a front cap.
is the front panel.

As explained above, according to the present invention, the bending portion 21 b
With a simple structure that only includes the heat dissipation plate 21 and the heater 22, frost formation on the suction port 4 and the inner wall of the air passage 1 near the suction port 4 can be effectively reduced. It is also possible to effectively catch and heat lumps of frost that have separated from the inner wall of the air passage 1 near the inlet 4 and melt them.

In addition, in the above-mentioned embodiment, the case where the air curtain is formed in two layers has been explained, but it is possible to similarly implement the case where the air curtain is formed in only one layer or to form three or more layers, and to have the same effect. Needless to say.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view schematically showing an example of a frozen or refrigerated open showcase to which the present invention can be applied, FIG. 2 is a cross-sectional view showing an air intake part according to an embodiment of the present invention, and FIG.
This figure is an enlarged sectional view of the main part of FIG. 2, and FIG. 4 is a perspective view showing the state in which the heater 22 is attached to the heat sink 21 in FIGS. 2 and 3. 1...First air path, 2...Cooler, 3
and 7...Blower means, 4...Inner suction port, 5...Inner air outlet, 6...Second
air passage, 8...outer inlet, 9...outer outlet, 10...rectifier, 11...
・Opening part, 12... Inside the warehouse, 13... Product display shelf, 21... Heat sink, 21 b...
...Bending part, 22... Heater, C1...
・Inner air curtain, C2...Outer air curtain.

Claims (1)

[Scope of utility model registration request] A heat dissipation plate having one end attached to the inner wall of the air passage near the intake port in which the cooler is arranged so as to block a part of the air passage, and the other end formed as a bent portion facing the intake port side. An air suction section of an open showcase for freezing or refrigerating, characterized in that at least one is provided, and a heater is attached to the heat sink.