JPH0160176U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本考案の一実施例を示す冷凍・冷蔵
オープンシヨーケースの断面図、第２図は、その
冷媒回路図、第３図は、運転動作を示すタイムチ
ヤート、第４図は、他の実施例の冷媒回路図、第
５図は、従来の冷凍・冷蔵オープンシヨーケース
の断面図である。 尚、図中１はケース本体、２は開口部、６は冷
気循環ダクト、８は吹出口、１６は区画板、１７
ａ，１７ｂは通路、１８ａ，１８ｂは冷却器、１
９，２０は送風機、２２ａ，２２ｂ，２４ａ，２
４ｂ，３１は電磁弁、２３ａ，２３ｂは膨張弁、
２５ａ，２５ｂは切換弁、２６はタイマ制御回路
、２７は圧縮機、２８は凝縮器、３３は吐出管、
３４は高温冷媒ガスバイパス管、３５は冷媒液管
、３６は冷媒液排出管、３７は冷媒ガス管、３８
は吸入管、４０ａ，４０ｂ，４１ａ，４１ｂは電
磁弁である。 Fig. 1 is a sectional view of a freezing/refrigerating open case showing an embodiment of the present invention, Fig. 2 is its refrigerant circuit diagram, Fig. 3 is a time chart showing its operation, and Fig. 4 is: FIG. 5, which is a refrigerant circuit diagram of another embodiment, is a sectional view of a conventional refrigeration/freezer open case. In the figure, 1 is the case body, 2 is the opening, 6 is the cold air circulation duct, 8 is the air outlet, 16 is the partition plate, 17
a, 17b are passages, 18a, 18b are coolers, 1
9, 20 are blowers, 22a, 22b, 24a, 2
4b, 31 are electromagnetic valves, 23a, 23b are expansion valves,
25a and 25b are switching valves, 26 is a timer control circuit, 27 is a compressor, 28 is a condenser, 33 is a discharge pipe,
34 is a high temperature refrigerant gas bypass pipe, 35 is a refrigerant liquid pipe, 36 is a refrigerant liquid discharge pipe, 37 is a refrigerant gas pipe, 38
is a suction pipe, and 40a, 40b, 41a, 41b are solenoid valves.

Claims (1)

【実用新案登録請求の範囲】 ケース本体内に冷気循環ダクトを形成し、同冷
気循環ダクト内に配設した冷却器により、循環空
気を冷却し、同空気を吹出口から吹出させてケー
ス開口部に冷気エアカーテンを形成した冷凍・冷
蔵オープンシヨーケースにおいて、 前記冷気循環ダクト内の少なくとも一部を２層
通路に区画し、各通路に冷却器を設けて同冷却器
を冷媒回路に対して互いに並列に接続させるとと
もに、各冷却器を高温ガス導入により独立して除
霜可能にし、さらに除霜した後の液化した高温ガ
スを冷却用液冷媒管にもどし、冷却に再利用する
除霜機構を設けたことを特徴とする冷凍・冷蔵オ
ープンシヨーケース。[Scope of Claim for Utility Model Registration] A cold air circulation duct is formed within the case body, the circulating air is cooled by a cooler disposed within the cold air circulation duct, and the air is blown out from the air outlet to open the case opening. In an open refrigeration/refrigeration case in which a cold air curtain is formed, at least a part of the cold air circulation duct is divided into two-layer passages, a cooler is provided in each passage, and the coolers are connected to each other with respect to the refrigerant circuit. In addition to connecting them in parallel, each cooler can be defrosted independently by introducing high-temperature gas, and the defrosting mechanism returns the liquefied high-temperature gas after defrosting to the liquid refrigerant pipe for cooling and reuses it for cooling. Freezer/refrigerated open storage case.