Cold storage showcase

Abstract

The temperature of an accommodating room is adjusted without causing drop of melting water from an upper evaporator onto the accommodated food materials. A cold storage showcase includes a cooling circuit 50 in which an upper evaporator 40 provided on an upper side of an accommodating room 14 and a lower evaporator 42 provided on a lower side of the accommodating room 14 are connected to a cooling apparatus. The upper evaporator 40 and the lower evaporator 42 are connected in parallel with the cooling apparatus. An electromagnetic valve SV for supplying or interrupting circulation of a cooling medium in the lower evaporator 42 is provided halfway a second route R2 on an upstream side of the lower evaporator 42. During a cooling operation, the accommodating room 14 is cooled at all times by the upper evaporator 40. When temperature detecting means Th detects a drop in temperature of the accommodating room 14, the electromagnetic valve SV is closed to stop the cooling by the lower evaporator 42. On the other hand, when the temperature detecting means Th detects a rise in temperature of the accommodating room 14, the electromagnetic valve SV is opened to adjust the temperature by cooling the accommodating room 14 by the lower evaporator 42.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a cold storage showcase which is installed in a counter in an eating-house or the like in order to preserve materials accommodated in an accommodating room in cold storage while displaying the materials, and more particularly to a cold storage showcase constructed such that an accommodating room is cooled by evaporators which are provided on an upper portion and a lower portion of the accommodating room, respectively.[0003]2. Description of the Related Art[0004]A neta case which is installed in a counter, for example, in a sushi bar or the like in order to preserve perishable food materials such as sushi netas accommodated in cold storage while displaying them to customers has been known as a cold storage showcase for preserving food materials such as foods and drinks in cold storage (refer to Japanese Unexamined Patent Publication (Koho) No. 2000-139633). For example, as shown in FIG. 3...

AI Technical Summary

Benefits of technology

[0009]That is to say, in view of the above-mentioned problems in the cold storage showcase according to the prior art, the present invention is proposed in order to suitably solve those problems. Thus, it is an object of the present invention to provide a cold storage showcase in which melting water is prevented from dropping from an upper evaporator onto any of accommodated materials, and the temperature of the accommodating room can be suitably adjusted.

Problems solved by technology

However, with this temperature adjusting method using the constant pressure expansion valve, since the expansion valve EV opens and closes in accordance with pressures in both the upper evaporator 40 and the lower evaporator 42, it becomes impossible to follow a major change in outside air temperature.

For example, it is feared that although if a set temperature of the accommodating room 14 is adjusted to a low temperature range, the accommodated food materials can be suitably cooled even when the outside air temperature becomes high, if the outside air temperature drops, the temperature of the accommodating room 14 drops too much to supercool the accommodated food materials, so that the accommodated food materials are likely to be spoiled due to freezing or the like.

On the other hand, if the set temperature of the accommodating room 14 is set at a high temperature range, the accommodated food materials cannot be sufficiently cooled when the outside air temperature rises, and thus a disadvantage that the deterioration of the accommodated food materials may be accelerated is pointed out.

That is to say, the user needs to frequently carry out the temperature adjustment of the accommodating room 14, which is cumbersome.

However, when the droplet receptacle 70 is provided, there are disadvantages that the droplet receptacle 70 not only blocks the light introduced into the inside through the glass cover 30 and makes the visibility worse to impair the quality of display of the accommodated food materials, but also impedes the circulation of the ambient atmosphere within the accommodating room, which becomes cooled air through the heat exchange in the upper evaporator 40, resulting in lowering cooling efficiency.

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