JPH06213554A - Chilled air-circulating type open showcase - Google Patents

Abstract

PURPOSE:To prevent outside air entering the showcase chamber from condensing on the surface of the ceiling without installing an anticondensation heater on the ceiling of the showcase chamber. CONSTITUTION:At a rear position of the ceiling plate 31 of a showcase chamber 4 an air hole 11 through which cooling air flowing through a chilled air circulation channel 5 is drawn into the showcase chamber is formed. There is also provided an air direction guide 12 which directs the air drawn into the showcase chamber to flow along the ceiling of the showcase chamber 4 and toward the front. By virtue of this cooling air flowing along the ceiling it is prevented for water vapor in the outside air to condense and attach to the ceiling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold air circulation type open showcase in which air inside a refrigerator is circulated through a cooler by a fan to cool products in the refrigerator.

[0002]

2. Description of the Related Art An open showcase of this type is known as shown in FIG. In the figure, the main body case 1 of the open showcase is provided with an opening 1a for taking out products on the front side.
The outer box 2 is formed in a U-shaped cross section and has a heat insulating wall, and the inner box 3 is arranged at an appropriate interval on the outer box 2. An inner portion 4 is formed, and a cool air circulation passage 5 is formed between the outer casing 2 and the inner casing 3, and a fan 6 and a cooler 7 are arranged therein. Both ends of the cold air circulation path 5 are opposed to each other and face the upper and lower sides of the opening 1a to open to form an air outlet 5a and an air inlet 5b having an air rectifier. Reference numeral 8 is a shelf for partitioning the interior 4 into upper and lower parts to display a large number of products.

In the above open showcase, the air in the refrigerator is sucked into the cold air circulation path 5 from the suction port 5b by the fan 6 and passes through the cooler 7 to become the cooling air, which is circulated as shown by the arrow A, and the cooling air is blown. The cold air curtain 10 is formed at the opening 1a by blowing out from the outlet 5a, and
To cool. In the open showcase, the cold air curtain 10 is disturbed when a product is taken out from the opening 1a, and hot and humid outside air enters the inside 4 of the warehouse. The water vapor in the outside air adheres to and is condensed on the inner box 3 cooled by the cooling air flowing through the cold air circulation path 5 to generate dew. The dew generated on the back plate of the inner box 3 is transmitted to the back side and does not cause a big problem, but the dew formed on the ceiling plate 31 drips and wets the product or the arm of the customer who has spread it to the inside 4 and Make it uncomfortable. For this reason, a heat insulating sheet is attached to the ceiling surface of the inner box 3 and a dew proof heater 9 is attached to prevent dew condensation.

[0004]

By the way, in the conventional open showcase, since the dew-proof heater 9 is installed on the ceiling surface of the inside of the warehouse, the power consumption by the dew-proof heater is increased and the energization control of the dew-proof heater is required. There are drawbacks that the running cost is high and the maintenance is complicated.

An object of the present invention is to provide a cold air circulation type open showcase in which the dew-proof heater is eliminated and dew condensation is prevented on the ceiling surface in the refrigerator.

[0006]

In order to achieve the above object, according to the present invention, a main body case having a U-shaped cross section having an opening for taking out goods at the front is an outer box formed of a heat insulating wall, and an inner box. A cold air circulation path is formed between the outer box and the inner box, the cold air circulation path having both ends facing the upper and lower sides of the opening and forming a blowout port and a suction port. A ceiling wall of the inner box in a cold air circulation type open showcase in which air inside a refrigerator is circulated through a cooler by a fan arranged in a circulation path to form a cool air curtain in the opening and cools the inside. A ventilation hole is provided on the back side for communicating the cold air circulation path with the inside of the refrigerator, and in addition, a part of the cooling air circulating in the cold air circulation path is introduced into the refrigerator through the ventilation hole and along the ceiling wall of the inner box. Guide to flow forward It is assumed that the provision of the direction guide.

[0007]

The cooling air guided to the inside of the refrigerator through the ventilation holes flows along the ceiling surface of the refrigerator, and prevents the vapor in the outside air that has entered the refrigerator from adhering and condensing on the ceiling surface. Therefore, dew condensation on the ceiling surface is prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 show an embodiment of the present invention, in which parts common to or the same as those in FIG. 1 to 3, the ceiling plate 31 of the inner box 3 has a number of ventilation holes 1 along the longitudinal direction at a position near the back plate.
1 is formed. In addition, a wind direction guide 32 is provided on the ceiling surface of the ceiling plate 31 so as to be close to the ventilation hole 31 and extends in the longitudinal direction in a hook shape. Therefore, the heat insulating sheet and the dew-proof heater (9 in FIG. 4) which are conventionally installed on the ceiling surface are deleted.

In the above structure, the fan 6 allows
A part of the cooling air flowing through the cold air circulation path 5 as indicated by the arrow A is guided by the wind direction guide 12 through the ventilation hole 11 and flows along the ceiling surface of the inner box 3 as indicated by the arrow B. Therefore, it is prevented that the water vapor in the outside air that has entered the interior 4 is blown off by the cooling air flowing as shown by the arrow B and adheres and condenses on the ceiling surface of the ceiling plate 31. Therefore, no dew condensation will occur on the ceiling surface of the interior 4.

[0010]

According to the present invention, a main body case having a U-shaped cross section having an opening for taking out products on the front surface is constituted by an outer box which is a heat insulating wall and an inner box which forms the inside of the box. A cold air circulation path is formed between the outer box and the inner box so that both ends thereof face the upper and lower sides of the opening and serve as a blow-out port and a suction port. In a cool air circulation type open showcase that circulates air through a cooler to blow out and form a cool air curtain in the opening and cool the inside of the compartment, the cold air circulation path and the inside of the compartment on the inner side of the ceiling wall of the inner box. In addition to providing a ventilation hole for communicating the cooling air circulation path, a part of the cooling air circulating in the cold air circulation path is introduced into the refrigerator through the ventilation hole, and a wind direction guide is provided to guide the cooling air to flow forward along the ceiling wall of the inner box. Because it was, Without providing the anti-condensation heater on the surface, to condensation is prevented on the ceiling surface, the running cost of the open showcase also maintenance is suppressed to a low level is also easily performed.

[Brief description of drawings]

FIG. 1 is a sectional view of a cold air circulation type open showcase showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of an essential part of the invention of the open showcase of FIG.

3 is a perspective view of an essential part of the invention of the open showcase of FIG. 1. FIG.

[Figure 4] Sectional view of the recent open showcase

[Explanation of symbols]

 1 Main body case 3 Inner box 4 Inside 5 Cold air circulation path 11 Vent hole 12 Wind direction guide 31 Ceiling plate (ceiling wall)

Claims (2)

[Claims] 1. A main body case having a U-shaped cross-section having an opening for taking out goods on the front surface is constituted by an outer box which is a heat insulating wall and an inner box which forms the inside of the box, and the outer box and the inner box. A cold air circulation path is formed between the box and the box, with both ends facing the upper and lower sides of the opening and forming a blowout port and a suction port, and a fan provided in this cold air circulation channel circulates the air inside the refrigerator through a cooler. In the cold air circulation type open showcase that blows and forms a cool air curtain in the opening and cools the inside of the compartment, a vent hole for communicating the cold air circulation path and the inside of the compartment is provided on the inner side of the ceiling wall of the inner box. A cool air circulation open showcase characterized by being provided. 2. The cold air circulation type open showcase according to claim 1, wherein a part of the cooling air circulating in the cold air circulation path is introduced into the refrigerator through the ventilation holes and flows forward along the ceiling wall of the inner box. A cold air circulation type open showcase that is equipped with a wind direction guide that guides to the.