JPH0726781B2 - Showcase - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a showcase having a cool air discharge port formed on a lower surface of a product storage chamber and having a wind direction plate extending upward from the cool air discharge port.

(B) Prior art A low temperature showcase disclosed in Japanese Patent Laid-Open No. 62-228854 (F25D 21/04) has a cooling chamber in which an evaporator and a blower are housed in a container-shaped heat insulating material having an upper opening, and the heat insulating material. A machine room accommodating an electric compressor and a condenser in a space below, and a commodity storage room having a transparent peripheral side wall installed above the cooling chamber,
A cold air discharge port and a cold air suction port communicating with the cooling chamber and the product storage chamber are formed on the lower surface of the product storage chamber, and a space is provided between the cold air discharge port and the side wall of the product storage chamber. Equipped with a wind direction plate extending upward to form a cool air passage,
An auxiliary discharge port for discharging cool air from the cooling chamber is formed inside the wind direction plate.

(C) Problem to be Solved by the Invention According to the above-mentioned conventional technique, the supply cold air having a low temperature passing through the cold air passage formed by the wind direction plate and the side wall is in the low temperature region of the product storage chamber and the warm region. In order to constantly cool the side wall that is the boundary with the inside of the store, the surface of the lower part of the side wall becomes a temperature below the dew point and dew condensation occurs. The problem arises. In particular, when the product storage room is maintained in an ice temperature range of 0 ° C. or lower as in recent years, the amount of dew condensation tends to increase due to the temperature of the supplied cold air being the Nimas temperature.

The present invention is intended to solve the above problems,
By arranging the wind direction plate, dew condensation on the lower part of the side wall is prevented without reducing the wind speed from the discharge port.

(D) Means for Solving the Problem In order to achieve the above object, as means of the present invention, a cooling chamber in which an evaporator and a blower are housed in a container-shaped heat insulating material having an upper opening, and the heat insulating material It consists of a machine room that houses an electric compressor and a condenser in the lower space, and a product storage room that is installed above the cooling room and that has a transparent peripheral side wall. A cold air discharge port and a cold air suction port that communicate with the cooling chamber and the product storage chamber are formed, and a wind direction plate having a cold air passage for directing upwardly directed cold air supplied from the cold air discharge port, Provided is a showcase having an inner wall and an outer wall, the upper end of which is closer to the outer wall than the lower end of the inner wall, and a heat insulating space which does not cause convection between the outer wall of the wind vane and the side wall. .

(E) Action According to the above means, the outer wall of the wind direction plate acts to prevent contact between the supplied cool air immediately after being discharged from the cool air discharge port and the side wall, and between the outer wall and the side wall. Since the formed adiabatic space has a width that does not allow convection of gas, the heat transfer from the outer wall cooled by the supplied cold air to the side wall is mainly radiant with a weak transfer force, so the lower surface of the side wall has a temperature below the dew point. It almost never goes down.

Further, since the upper end of the inner wall is closer to the outer wall than the lower end so that the width of the upper end of the cool air passage is narrower than the width of the lower end, the wind speed of the cool air passing through the cool air passage can be increased.

(F) Example Hereinafter, one example of the present invention will be described in detail with reference to the drawings.

(1) shown in FIGS. 2 and 3 is a vertically long rectangular parallelepiped low-temperature showcase, which is a cooling chamber (3) formed by a container-shaped heat insulating material (2) made of, for example, water-resistant polystyrene foam having an open top surface. And the side wall (4A) (4) below the heat insulating material (2).
A machine room (4) whose periphery is covered with A) and a product storage room (5) installed above the cooling room (3) are provided. Here, the cooling chamber (3) is provided with a plate fin type evaporator (6) and an axial flow type blower (7) for this evaporator, and a machine chamber (4) forms a refrigeration cycle together with the evaporator. A condenser (8), a blower (9) for the condenser, and an electric compressor (10) are provided. or,
One of the peripheral side walls of the product storage room (5), for example, the front surface is opened, and the opening / closing door (12) (1) (1)
2) are provided above and below, and the other side wall 3 (13) around the periphery is made of transparent glass. In addition, vertically extending columns (1) between the four corners of the product storage room (5), that is, between the side walls (13).
4) are arranged, and a plurality of product loading shelves (15) are erected and supported on these columns (14). Incidentally, (16) is the top wall of the product storage room (5).

Reference numeral (23) is a rectangular resin partition plate for partitioning the product storage chamber (5) and the cooling chamber (3), which is placed on the peripheral wall (2A) of the heat insulating material (2) at least on three sides. Each side wall (1
A frame portion (17) for fitting and supporting the lower portion of 3) is formed, and the product storage chamber (5) and the cooling chamber (3) communicate with each other along two parallel sides of the frame portion (17). Cold air outlet (18)
And a cold air suction port (19) are formed, and an auxiliary cold air discharge port (18A) and an auxiliary cold air suction port (19A) are further provided along the inside of the cold air discharge port (18) and the cold air suction port (19). Has been formed.

(20) is a hollow wind vane made of a transparent resin that directs the supplied cold air among the cold air that is discharged from the cold air discharge port (18) and forcedly circulated as shown by the arrow in FIG. ) And the auxiliary cold air discharge port (18A) respectively, the inner wall (21) for preventing the merge of the supply cold air immediately after the discharge, and the side wall (13) of the supply cold air immediately after the discharge discharged from the cold air discharge port (18). An outer wall (22) for preventing contact with the cold air passage (24) is formed between the inner and outer walls (21, 22). The wind direction plate (20) is placed on the frame portion (17) by inserting the lower part thereof into the cool air discharge port (18) and the auxiliary cool air discharge port (18A), and is supported by the partition plate (23). Along with this support, a heat insulating space (25) having a width of 1 to 3 mm is formed between the outer wall (22) and the side wall (13) without convection.
The height of the wind direction plate (20) is set higher than the distance of the core region (arrow shown in FIG. 1A) in which the initial discharge velocity of the supplied cold air is maintained. Reference numeral (26) is a drainboard placed on the partition plate (23).

The wind direction plate (20) may be provided at the cold air suction port (19) and the auxiliary cold air suction port (19A).

According to such a configuration, the outer wall (22) of the wind direction plate (20) acts to prevent contact between the supply cool air having a low temperature discharged from the cool air discharge port (18) and the side wall (13) immediately after discharge. None, or the heat insulating space (2) formed between the outer wall (22) and the side wall (13)
Since 5) is the width where the gas does not convect, the heat transfer from the outer wall (22) cooled by the supply cold air to the side wall (13) is mainly radiant with weak transfer force, so the lower surface of the side wall is the dew point. It rarely falls to the temperature below and therefore the side wall (3)
The dew condensation on the lower surface can be avoided, and at the same time, the heat loss of the cold air supplied through the lower part of the side wall (13) can be prevented.

Further, since the height of the wind direction plate (20) is higher than the distance of the core region where the initial velocity of the supplied cool air is maintained, the so-called Coanda effect in which the supplied cool air adheres to the side wall (13) can be prevented.

Further, since the upper end of the inner wall is closer to the outer wall than the lower end so that the width of the upper end of the cool air passage is narrower than the width of the lower end, the wind speed of the cool air passing through the cool air passage can be increased, and cooling is most difficult. The uppermost part of the product storage room can be cooled sufficiently.

(G) Effects of the Invention In the above-described invention, the following effects are produced.

Since the outer wall of the wind direction plate acts to prevent contact between the supply cool air immediately after being discharged from the cool air discharge port and having a low temperature and the side wall, direct cooling of the lower part of the side wall by the supply cool air can be prevented.

Since the heat insulating space formed between the outer wall and the side wall has a width that does not allow convection of gas, heat transfer from the outer wall cooled by the supply cold air to the side wall is mainly due to radiation having a weak transfer force. The surface rarely drops to a temperature below the dew point, and as a result, dew condensation on the lower surface of the side wall can be avoided, and at the same time, heat loss of the cold air supplied through the lower part of the side wall can be prevented.

Since the upper end of the inner wall is closer to the outer wall than the lower end and the width of the upper end of the cool air passage is narrower than the width of the lower end, the wind speed of the cool air passing through the cool air passage can be increased, and the most difficult to cool product storage The top of the chamber can also be cooled sufficiently.

[Brief description of drawings]

The drawings each show an embodiment of a showcase of the present invention.
The figure is an enlarged view of a main part, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is an overall perspective view. (3) …… Cooling chamber, (13) …… Sidewall, (18) …… Cold air discharge port, (19) …… Cold air intake port, (20) …… Wind vane, (2
1) …… Inner wall, (22) …… Outer wall, (25) …… Adiabatic space.

Claims (1)

[Claims] 1. A cooling chamber in which an evaporator and a blower are housed in a container-shaped heat insulating material having an upper opening, a machine room in which an electric compressor and a condenser are housed in a space below the heat insulating material, and the cooling chamber. And a cold storage outlet that connects the cooling chamber and the cold storage inlet to a partition plate on the lower surface of the cold storage chamber. A wind direction plate that is formed and has a cold air passage for directing upwardly the cool air supplied from the cool air discharge port, and the wind direction plate has both inner and outer walls, and the upper end is closer to the outer wall than the lower end of the inner wall. At the same time, a showcase is formed between the outer wall and the side wall to form a heat-insulating space in which convection does not occur.