JPH0182486U

JPH0182486U -

Info

Publication number: JPH0182486U
Application number: JP1987177685U
Authority: JP
Priority date: 1987-11-20
Filing date: 1987-11-20
Publication date: 1989-06-01

Description

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

第１図はこの考案の一実施例の縦断面図、第２
図はこの実施例の冷気循環供給手段の冷媒循環路
系を示す構成説明図、第３図は冷却時における冷
媒の流れを示す第２図相当図、第４図は補助エバ
ポレータの除霜時における第３図相当図、第５図
は主エバポレータの除霜時における第３図相当図
、第６図はこの実施例の冷気循環供給手段の動作
状態を示すシーケンス回路、第７図はこの実施例
に関わる要部電気回路図である。Ｒ……多段型オープン低温ケース、１……ケー
ス本体、２……開口、３，１８……吐出口、４，
１９……吸込口、５……冷気循環供給手段、６…
…コンプレツサ、７，８……電磁弁、９……主エ
バポレータ、１０……補助エバポレータ、１１，
１２……膨張弁、１３……三方弁、１４……フア
ンモータ、１５……デフロストヒータ、２１……
デフロストタイマ（切換え手段）。 Figure 1 is a vertical sectional view of one embodiment of this invention, Figure 2
The figure is a configuration explanatory diagram showing the refrigerant circulation path system of the cold air circulation supply means of this embodiment, Fig. 3 is a diagram equivalent to Fig. 2 showing the flow of refrigerant during cooling, and Fig. 4 is a diagram showing the flow of refrigerant during cooling, and Fig. 4 is a diagram showing the refrigerant flow during defrosting of the auxiliary evaporator. FIG. 3 is a diagram corresponding to FIG. 3, FIG. 5 is a diagram corresponding to FIG. 3 during defrosting of the main evaporator, FIG. 6 is a sequence circuit showing the operating state of the cold air circulation supply means of this embodiment, and FIG. 7 is a diagram of this embodiment. FIG. R...Multi-stage open low temperature case, 1...Case body, 2...Opening, 3, 18...Discharge port, 4,
19...Suction port, 5...Cold air circulation supply means, 6...
... Compressor, 7, 8 ... Solenoid valve, 9 ... Main evaporator, 10 ... Auxiliary evaporator, 11,
12... Expansion valve, 13... Three-way valve, 14... Fan motor, 15... Defrost heater, 21...
Defrost timer (switching means).

Claims

【実用新案登録請求の範囲】多段型のオープンケース本体と、冷凍サイクル
を構成する冷媒回路とからなり、オープンケース
本体が、その本体の開口の上側縁から下側縁へと
、エアカーテン用の空気を送り、開口をエアカー
テンで閉塞するための空気循環手段と、上記エア
カーテンとほぼ平行でかつエアカーテンよりオー
プンケース本体内側で、開口の上側縁から下側縁
へと冷媒回路のエバポレータを介して冷気を送つ
てオープンケース本体内に収容陳列する商品を冷
蔵するための冷気循環供給手段とを備えた多段型
オープン低温ケースにおいて、上記冷気循環供給手段が、冷気が通る冷気循環
路と、その冷気循環路に冷気を通すためのフアン
とからなり、冷媒回路が、コンプレツサ、コンデ
ンサ、第１の膨張弁、冷気循環路中に配設された
主エバポレータおよび上記コンプレツサを循環接
続してなる主回路と、上記コンプレツサと主エバ
ポレータとの間から分岐し、主エバポレータに熱
交換的に接触し、第２の膨張弁および冷気循環中
の上記主エバボレータの上流側に配設され、デフ
ロストヒータを付設した補助エバポレータを介し
て上記コンプレツサに至る分岐回路とからなり、
冷却時には主回路を冷媒が循環し、主エバポレー
タの除霜時にはコンプレツサ、および分岐回路を
冷媒が循環し、補助エバポレータの除霜時には、
主回路を冷媒が循環するよう主回路と分岐回路と
を切換る分岐回路の分岐部分に設けられた切換弁
とからなる多段型オープン低温ケース。[Claims for Utility Model Registration] Consisting of a multi-stage open case body and a refrigerant circuit constituting a refrigeration cycle, the open case body extends from the upper edge of the opening of the body to the lower edge of the opening for the air curtain. an air circulation means for sending air and closing the opening with an air curtain, and an evaporator of the refrigerant circuit running from the upper edge of the opening to the lower edge approximately parallel to the air curtain and inside the open case main body from the air curtain. A multi-stage open low-temperature case comprising a cold air circulation supply means for sending cold air through the open case body to refrigerate products stored and displayed in the open case body, the cold air circulation supply means including a cold air circulation path through which the cold air passes; The refrigerant circuit includes a compressor, a condenser, a first expansion valve, a main evaporator disposed in the cold air circulation path, and a fan for passing cold air through the cold air circulation path. The circuit is branched from between the compressor and the main evaporator, is in contact with the main evaporator in a heat exchange manner, is provided with a second expansion valve and on the upstream side of the main evaporator during cold air circulation, and is equipped with a defrost heater. and a branch circuit leading to the compressor via the auxiliary evaporator.
During cooling, refrigerant circulates through the main circuit, during defrosting of the main evaporator, refrigerant circulates through the compressor and branch circuit, and during defrosting of the auxiliary evaporator,
A multi-stage open low-temperature case consisting of a switching valve installed at the branch part of the branch circuit that switches between the main circuit and the branch circuit so that refrigerant circulates through the main circuit.