JPS61101784A - Method of operating cryostatic showcase - Google Patents
Method of operating cryostatic showcaseInfo
- Publication number
- JPS61101784A JPS61101784A JP22373784A JP22373784A JPS61101784A JP S61101784 A JPS61101784 A JP S61101784A JP 22373784 A JP22373784 A JP 22373784A JP 22373784 A JP22373784 A JP 22373784A JP S61101784 A JPS61101784 A JP S61101784A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- inner layer
- outer layer
- air
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Freezers Or Refrigerated Showcases (AREA)
- Defrosting Systems (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は内層、外層の各々に熱交換器、送ａ機を配置し
た強制循環式の低温ショーケースの運転方法に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method of operating a forced circulation type low temperature showcase in which a heat exchanger and a feeder are arranged in each of the inner and outer layers.
（ロ）従来の技術
特公昭４２−２４７９７号公報には、内層及び外層の各
々に熱交換器と送風機とを配置し、内層及び外層を夫々
通過する循環空気を冷却して開口に２層のエアーカーテ
ンを形成するτ−ブンショーケースの購成が示されて（
・る。前記両熱又換器は並列関係に接続され、内層用熱
５ｃ換器のみホットカス除霜されるようになっている。(b) The conventional technology disclosed in Japanese Patent Publication No. 42-24797 discloses that a heat exchanger and a blower are disposed in each of the inner layer and the outer layer, and the circulating air passing through the inner layer and the outer layer is cooled to form two layers in the opening. The purchase of a τ-bun showcase forming an air curtain is shown (
・Ru. Both of the heat exchangers are connected in parallel so that only the inner layer heat exchanger 5c is subjected to hot waste defrosting.
（ハ） 発明が解決しようとする問題点かへるオーブン
ショーケースの運転システムは、冷却運転時には内層用
、外層用熱交換器に液冷媒を流して蒸発気化させ、内層
、外層を１１！ｌ適する循環空気の冷却を図り、又、除
霜運転時にはホットガスを内層用熱交換器に流し２疑縮
液化させ、この熱交換、こまって内層用たき交換器の１
肩？７容かすだ３−） ｋｃ、１・記しこ列挙−Ｃる問
題が生じす。(c) Problems to be Solved by the Invention The operation system of the heating oven showcase is such that during cooling operation, liquid refrigerant is passed through the heat exchangers for the inner layer and the outer layer to evaporate and vaporize the inner layer and the outer layer. In addition, during defrosting operation, the hot gas is passed through the inner layer heat exchanger and is liquefied into a double condensate.
shoulder? 7 volume Kasuda 3-) kc, 1・Note enumeration-C problem arises.
■ ホットガスを内層用熱交換器に流して凝縮液化して
（・る除霜運転時には、内ｉＭを通過中の循ｐ１空気を
・冷却する冷熱諒がなし・ために、循環空気及び貯蔵室
の空気＋７！度が上がり、貯蔵商品にとって好まし７く
ない事態となる。■ During defrosting operation, the hot gas flows through the inner layer heat exchanger to condense and liquefy. The air temperature rises to +7!, creating an unfavorable situation for stored products.
少 玲霜運転時、内層用熱交換器で得られた液冷媒の圧
縮機へのバックを阻止ｊるために、除霜貯僧を１設けて
７仮冷媒を蒸発させねばならず、液冷媒の宵効ｐＨ用を
図れないばかりか、冷凍装置の構成部品が〕１１え高価
なものとなりた。During low-temperature operation, in order to prevent the liquid refrigerant obtained from the inner layer heat exchanger from flowing back into the compressor, one defrost reservoir must be installed to evaporate the temporary refrigerant, and the liquid refrigerant Not only was it impossible to achieve the desired pH value, but the components of the refrigeration system became more expensive.
に）問題点を解決するだめの手段
本発明；ま上記問題点を解決するために、内層じと外層
（７）とを仕切るｉ１区画板（４）シこ、２ケ所で内−
°Ｖ両１層を連通させる第１．第２両窓（４Ｃ）（４Ｄ
）と。b) Means to solve the problem The present invention: In order to solve the above problem, the i1 partition plate (4) that partitions the inner layer and the outer layer (7) is provided with an inner layer at two places.
°V The first one to connect both first layers. 2nd double window (4C) (4D
)and.
この両応を夫々閉塞する開閉自在な第１．第２両２゛ツ
バ（、＄Ａ）（４Ｂ）とを設け、Ｓ霜運転時、内層用熱
交換器ｕｎで４ｉ縮液化さした冷媒を外層用熱交換器（
５）で萎発・気１ヒさせると共に、第１、第２両ダンパ
（、ｓＡ） （４Ｂ）を開放し１内層用ｒ交ＰＲａ ｆ
−１１３を通過した循環空気を第１＄Ｌ＋Ｃ）を〕由し
て外層（７）に導き、外層用熱交換器（５）を通過させ
た後、第２窓（４Ｄ）を辿して内層Ｏ：つに再度４き、
開口（３）にエアーカーテン（ＣＡ）を形成するように
した低温ンヨーケース（１）の運転方法である。The first door, which can be opened and closed, closes each of these two reactions. A second car 2゛ collar (, $A) (4B) is installed, and during S frost operation, the refrigerant condensed to 4I in the inner layer heat exchanger un is transferred to the outer layer heat exchanger (
At the same time as 5), open both the first and second dampers (, sA) (4B) and press the 1st inner layer r.
The circulating air that has passed through -113 is guided to the outer layer (7) via the first $L+C), passes through the outer layer heat exchanger (5), and then follows the second window (4D) to the inner layer. O: One more time,
This is a method of operating a low temperature case (1) in which an air curtain (CA) is formed in the opening (3).
（ホ）作用
除１運転時、冷媒圧縮磯０９から吐出されたホットガス
ｉｉ、内層用熱交換器αＤで経及び循環空気と熱交換さ
れて凝縮液化し、次に外層用熱交換器（５）で前記循環
空気と熱交換され″′Ｃ蒸発気化し、一方向層α３を通
過する前記循環空気は、内層用熱交換器−で加熱された
後、第１窓（４Ｃ）から外層（７）に流れ、外層用熱交
換器（５）で冷却されて温亜低下した状態で第２窓（４
Ｄ）な通って内層α３に戻り、開口（３）において外気
より温度の低いエアーカーテン（ＣＡ）として形成され
る。即ち、除霜運転時、外層用熱交換器（５）は准冷媒
を蒸発気化する作用をなすと共に、内層用熱交換器ｉ、
１１）で加熱された循環空気を冷却してその温度を降下
する作用ななす。(e) During operation and removal 1 operation, the hot gas ii discharged from the refrigerant compressor 09 exchanges heat with the air and circulating air in the inner layer heat exchanger αD, condenses and liquefies, and then condenses and liquefies in the outer layer heat exchanger (5 ), the circulating air is evaporated and vaporized, and the circulating air passing through the one-way layer α3 is heated in the inner layer heat exchanger, and then transferred from the first window (4C) to the outer layer (7 ), is cooled by the outer layer heat exchanger (5), and is cooled down to the second window (4).
D) and returns to the inner layer α3, and is formed as an air curtain (CA) at a lower temperature than the outside air at the opening (3). That is, during defrosting operation, the outer layer heat exchanger (5) acts to evaporate the quasi-refrigerant, and the inner layer heat exchanger i,
11) Cools the heated circulating air to lower its temperature.
！べ 実施例
第１図に示−’Ｃ（１１は前面に、商品の収納及び取出
用・Ｄ開口（３）を形成した断熱壁（２）にて本体を構
成してなる開放形の低ｉ品ノー！−ケースで、前記断熱
壁の内壁より適当間隔を存して後述する内層側に開く里
ｌダンハ（４Ａ）、後述する外層側に開く第２ダノパ（
４Ｂ）及びこの両ダンパに−〔夫々閉塞されろ第１及び
第２両窓（４Ｃ） （４Ｄ）を備えた断熱性の第１区画
板（４）を配設してグレートフィン型の外層用熱交換器
（５）と軸流型の外層用送風機（６）とを配置する外層
（７）と、前記開口の上縁に沿って位置する外層用吹出
口（８）と、前記開口の下ｄに沿って位（ｎし。! Embodiment As shown in Figure 1, C (11 is an open-type low i In the case, there is a second danopa (4A) that opens on the inner layer side (described later) and a second danopa (4A) that opens on the outer layer side, which will be described later, at an appropriate interval from the inner wall of the heat insulating wall.
4B) and both dampers are provided with an insulating first partition plate (4) having first and second closed windows (4C) (4D), respectively, to form a great fin type outer layer. An outer layer (7) in which a heat exchanger (5) and an axial type outer layer blower (6) are disposed, an outer layer outlet (8) located along the upper edge of the opening, and an outer layer air outlet (8) located below the opening. Place (n) along d.
前記外層用吹出口に相対向する外層用吸込口（９）とを
形成し、又前記第１区画板の内壁より適当間隔を存して
金属製の第２区画板０Ｏを配設してグレートフィン型の
内層用熱交換器αυと軸流型の内層用送風機■とを配置
する内層日と、前記開口の上縁で且つ外層用吹出口（８
）の内方に並設された内Ｉ８用吹出口（１４）と、前記
開口の下行で外層用吸込口（９）の内方に並設さね、前
記内層用吹出口に相対向する内層用吸込口α９と、複数
段の棚００ケ配責した貯蔵室０乃とを形成している。前
記第１．第２両ダンパは熱絶縁材１例えば樹脂からなる
板状のものであり、第１グンバ（４Ａ）は第２ダンパ（
４Ｂ）から見て循環空気の流れ方向上流側に設けられ−
こおり、開放時その先端が第２区画板０口の外壁に当接
することが好ましく、又第２ダンパ（４Ｂ）は開放時そ
の先端が断熱壁（２）の内壁に当接乃至近接することが
好ましい。前記外層用熱交換器１ま第１、第２両ダンパ
（４Ａ）（４Ｂ）間に位１をする様、外層（５）内に配
置されており、又内層用熱交換器ｑυは第１ダ／パ（４
Ａ）からみて循環空気の流れ方向上流側となる装置に配
置されて（・る。尚、前記第１．第２両ダンパはギヤモ
ータ、／リンダー等を利用した適宜なボ動装置疋よって
開閉されるものである。An outer layer suction port (9) facing the outer layer outlet is formed, and a metal second partition plate 0O is arranged at an appropriate distance from the inner wall of the first partition plate. The inner layer where the fin type inner layer heat exchanger αυ and the axial flow type inner layer blower ■ are arranged, and the upper edge of the opening and the outer layer outlet (8
) and an inner layer air outlet (14) arranged in parallel on the inner side of the inner layer, and an inner layer air outlet (14) arranged in parallel on the inner side of the outer layer suction port (9) in the downward direction of the opening, and opposite to the inner layer air outlet. A storage room 00 with multiple shelves 00 is formed. Said 1st. Both second dampers are plate-shaped ones made of heat insulating material 1, for example, resin, and the first damper (4A) is connected to the second damper (
4B) is provided on the upstream side in the flow direction of the circulating air.
It is preferable that the tip of the second damper (4B) comes into contact with the outer wall of the second partition plate 0 when opened, and the tip of the second damper (4B) should not come into contact with or come close to the inner wall of the heat insulating wall (2) when opened. preferable. The heat exchanger 1 for the outer layer is arranged in the outer layer (5) so as to be placed between the first and second dampers (4A) (4B), and the heat exchanger qυ for the inner layer is arranged between the first and second dampers (4A) (4B). da/pa (4
A) The damper is placed on the upstream side in the flow direction of the circulating air when viewed from A).The first and second dampers are opened and closed by an appropriate motion device using a gear motor, a cylinder, etc. It is something that
第２図に示−（σ引ま、前記低温ショーケースを冷却す
るための冷凍装置で、冷媒圧縮機０９、疑都器となる水
冷又は空冷式の熱交換器頭、受液器７２１１、感温部（
２２Ａ）を備えた膨張弁等の減圧弁に、内層用熱交換器
（１℃、気液外πを器圏を高圧ガス管＠、高圧直管σ９
．低圧液管郊（び低圧ガス管にでもって１ｖ状て接続し
て（・ろ。ツはイへ田ガス管（５）に配置された電磁弁
、■は高圧ガス管いに配置された１つの入口ポー）１１
’０，２つの出口ボートＣ’ｆ’ｌ （７，３を有する
三方７Ｕｉ、磁弁等の流路切替弁、Ｇυは一端を前記流
路切替弁の出口ボー） （Ｚ３．他端を内層用熱交換器
αυと、電磁弁い負との間の低圧ガス管翰に接続してな
４）ホットガス用バイパス管、Ｑは高圧液管（イ）に配
置ｒｔされた電磁弁である。又、前記外層用熱交換器は
、内層用熱交換器Ｇ９に対し並列に配され、高圧Ｌ
液枝管田、低圧液管（ロ）及び低圧ガス枝Ｗ（至）によ
って高圧′ＫＩＬｖ（ｚ、と、低圧液管−とを接続され
ている。Fig. 2 shows a refrigeration system for cooling the low-temperature showcase, including a refrigerant compressor 09, a water-cooled or air-cooled heat exchanger head, a liquid receiver 7211, and a sensor. Hot part (
22A), a high pressure gas pipe @, high pressure straight pipe σ9
．． The solenoid valve is connected to the low-pressure liquid pipe (and the low-pressure gas pipe) in a 1V shape. (two entrance ports) 11
'0, two outlet boats C'f'l (3-way 7Ui with 7, 3, flow path switching valve such as magnetic valve, Gυ has one end as the outlet boat of the flow path switching valve) (Z3. the other end as the inner layer 4) Hot gas bypass pipe Q is a solenoid valve placed in the high-pressure liquid pipe (a). The outer layer heat exchanger is arranged in parallel with the inner layer heat exchanger G9, and high pressure 'KILv(z , and a low pressure liquid pipe are connected.
缶は高圧液枝管田に配置された電磁弁、（９）は低圧ガ
ス枝管（至）に配置された逆上弁、製は外層用熱交換器
（５）に減圧液冷媒を供給する感温部（３８Ａ）付き減
圧弁である。砕は除霜時熱交換器（１）、受液器Ｑ１）
から冷媒を回収する回収管、菊は回収管艶に設置された
亀Ｓ弁、４１）はタイマー装置等からなる制御器で流路
切替弁に珍、電磁弁ら襲（至）に）を所定時間開又は閉
信号なライン（ａ）（ｂ）（ｃ）（ｄｌ （ｃｌから送
るものである。The can is a solenoid valve placed in the high pressure liquid branch pipe, (9) is the reverse valve placed in the low pressure gas branch pipe (to), and the product is the supply of reduced pressure liquid refrigerant to the outer layer heat exchanger (5). This is a pressure reducing valve with a temperature sensing part (38A). Defrosting heat exchanger (1), liquid receiver Q1)
The recovery pipe that recovers the refrigerant from the recovery pipe, the chrysanthemum is the turtle S valve installed in the recovery pipe, and 41) is a controller consisting of a timer device, etc., which is unusual for the flow path switching valve, and the solenoid valve (also known as attack) is specified. Time open or close signal lines (a), (b), (c) (dl) (sent from cl).
次に低温ショーケース（１）の運転システムについて説
明する。Next, the operating system of the low temperature showcase (1) will be explained.
−・ま第１ダンパ（４Ａ） 、第２ダンパ（４Ｂ）は閉
じており、第１図に示すように、内層α３及び外層（７
）は夫々独立している。この時、流路切替弁（１）の入
口ボー）（Ｘ）と出口ポート（ト）とが通じ、ｉ磁弁四
と電磁弁□が開、電磁弁（至）と−が閉となっており、
か〜る状態で、冷媒圧縮機Ｏ９を稼動させると、冷媒１
文圧縮機θ９−流路切替弁翰一受筬器ｔ２υ−電磁弁（
２）−減圧弁＠−蒸発器となる内１鰻用熱父換器０１１
−電磁弁四−気液分離器ツー圧縮機ａ１の第２図太線で
示す周知のサイクルを形成し、この間熱交換器■で凝縮
液化、減圧弁翰で減圧、内層用熱交換器で蒸発気化され
る。この冷却運転において、内層用送風機＠でもって、
内層口を通過中の循環空気は、内層用熱交換器（１１）
を通過中の低圧液冷媒と熱交換されて冷却空気となり、
第１図矢印に示す如く冷たいエアーカーテア（ＣＡ）を
形成して貯蔵室α力の冷却を図る。一方、外層用送風機
（６）でもって外層（７）を通過中の循環空気は、第１
図矢印の如く開口（３）において冷たいエアーカーテン
（Ｃ，１の外側に沿って流れ、この冷たいエアーカーテ
ンの影響を受けてオープン７ヨーケース（１）を包囲す
る外気より斯低い温度となり、前記の冷たいエアーカー
テン（ＣＡ）と外気との接触を阻止する保はエアーカー
テア （ＧＡ ）として作用する。-・The first damper (4A) and the second damper (4B) are closed, and as shown in FIG. 1, the inner layer α3 and the outer layer (7
) are independent. At this time, the inlet port (X) and outlet port (G) of the flow path switching valve (1) are in communication, solenoid valve 4 and solenoid valve □ are open, and solenoid valves (to) and - are closed. Ori,
When the refrigerant compressor O9 is operated in such a state, the refrigerant 1
Compressor θ9 - Flow path switching valve holder t2υ - Solenoid valve (
2) - Pressure reducing valve @ - evaporator (1) Heat exchanger for eel 011
- Solenoid valve 4 - Gas-liquid separator 2 Compressor A1 The well-known cycle shown by the thick line in Figure 2 is formed, during which the heat exchanger ② condenses and liquefies, the pressure reducing valve holder reduces the pressure, and the inner layer heat exchanger evaporates. be done. In this cooling operation, with the inner layer blower @,
The circulating air passing through the inner layer port is transferred to the inner layer heat exchanger (11).
heat is exchanged with the low-pressure liquid refrigerant passing through and becomes cooling air.
As shown by the arrow in FIG. 1, a cold air curtain (CA) is formed to cool the α force in the storage chamber. On the other hand, the circulating air passing through the outer layer (7) with the outer layer blower (6) is
As shown by the arrow in the figure, the cold air curtain (C, 1) flows along the outside of the opening (3), and under the influence of this cold air curtain, the temperature becomes lower than the outside air surrounding the open 7 yaw case (1). A barrier that prevents contact between the cold air curtain (CA) and the outside air acts as an air curtain (GA).
冷却運転の進行に伴ない内層用熱交換器圓への着霜が多
くなると、電磁弁（至）が所定時間例えばこの秒間開き
、高圧液枝管田に分流される。この分流された液冷媒は
、減圧弁（ト）で減圧され、蒸発器となる外層用熱交換
器（５）で蒸発気化して低圧ガス枝管■を通り、低圧ガ
ス管翰に流れ、内層用熱交換器（ＩＩＩＹ通過した低圧
ガス冷媒と合流し圧縮機四に戻る第３図太線で示すサイ
クルとなる。このサイクルは冷却運転終了前、即ち冷却
運転から除霜運転に切り替る直前に行なわれ、この運転
によって内層用熱交換器Ｏυと同様に外層用熱交換器（
５）も低温となり、外層（７）を仙過中の循環空気は、
外層用送風機６ ＋５）を通過中の低圧液冷媒と熱交換
され、内層α３を循環中の冷却空気と略同じ乃至は若干
高い温度に維持される。尚、この冷却運転においては外
層用送風機（６）の運転を停止してもよい。As the cooling operation progresses, as frost builds up on the inner layer heat exchanger circle, the solenoid valve opens for a predetermined period of time, for example, this second, and the high-pressure liquid is diverted to the branch pipe field. This divided liquid refrigerant is depressurized by the pressure reducing valve (G), evaporated in the outer layer heat exchanger (5) which serves as an evaporator, passes through the low pressure gas branch pipe (■), flows to the low pressure gas pipe, and flows into the inner layer. It joins with the low-pressure gas refrigerant that has passed through the heat exchanger (IIIY) and returns to the compressor 4, resulting in the cycle shown in bold line in Figure 3. This cycle is performed before the end of the cooling operation, that is, immediately before switching from cooling operation to defrosting operation. By this operation, the outer layer heat exchanger (Oυ) as well as the inner layer heat exchanger Oυ
5) also becomes low temperature, and the circulating air passing through the outer layer (7) becomes
It exchanges heat with the low-pressure liquid refrigerant passing through the outer layer blower 6+5), and is maintained at approximately the same or slightly higher temperature than the cooling air circulating in the inner layer α3. Note that during this cooling operation, the operation of the outer layer blower (6) may be stopped.
この冷却運転中、除霜開始信号が出力されると、電磁弁
−，（イ）が閉すると共に、電磁弁−が開き。During this cooling operation, when the defrosting start signal is output, the solenoid valves - and (a) close, and the solenoid valve - opens.
流路切替弁（１）の出口ボート（至）が（力に切り替り
、且つ、第１及び第２両ダンパ（４Ａ） （４Ｂ）が開
くと、圧縮機四からのホットガスは流路切替弁（７）か
らホットガス用バイパス管Ｇ］）−内層用熱交換器αυ
−逆止弁（至）−電磁弁鏝一減圧弁（至）−気液分離器
の一圧縮機０１と流れ、又一方冷却運転時、受′腹器な
１Ｊ及び熱交換器（イ）に貯えられた冷媒（主として液
冷媒）は１回収管４１）、電磁弁（６）を通り、気液分
離器−に流れる第５図太線で示すサイクルを形成する。When the outlet boat (to) of the flow path switching valve (1) is switched to (power) and both the first and second dampers (4A) (4B) are opened, the hot gas from the compressor 4 is switched to the flow path. From valve (7) to hot gas bypass pipe G]) - Inner layer heat exchanger αυ
- Check valve (to) - Solenoid valve 1 Pressure reducing valve (to) - Gas-liquid separator 1 Flows to compressor 01, while during cooling operation, flows to receiver 1J and heat exchanger (a) The stored refrigerant (mainly liquid refrigerant) passes through the first recovery pipe 41), the solenoid valve (6), and flows to the gas-liquid separator, forming a cycle shown by the bold line in FIG.
このサイクルは冷媒回収を含む除霜運転であり、ホット
ガスは凝縮器となる内層用熱交換器α℃で凝縮液化され
て高圧液冷媒となり、減圧弁（ロ）で減圧され低圧液冷
媒となって外層用熱交換器（５）で蒸発気化される。前
記ホットガスの凝縮液化に伴ない、内層用熱交換器αυ
に付着した霜は徐々に溶かされ、且つ内１層用熱交櫻器
ｆｌｕ）を仙六も枦盾環空気のｒ１Ａ度は徐々に上昇す
る。この内層用熱交換器ケ＋ｌｌ′Ｉ＋９した循環空気
は第１ダノパ（４ｔ’＝）ｖこより内層０１におけろ流
れを中断されて第１窓（４Ｃ）力・ら外層（７）に流れ
、外層循環空気と合流する。この合流した循環空気は外
層用熱交換器（５）な通過中の低圧液冷媒と熱交換され
て冷却される。この冷却された循環空気は第２ダンパ（
４Ｂ）により分流され、その大部分は第２窓（４Ｃ）か
ら内層Ｑ３に流れ、又その一部分は第２ダンパ（４Ｂ）
と断熱壁（２１との間を通り外層（５）をそのま−流れ
、夫々内層用吹出口０４）及び成し、外層用吹込口（９
）と外層用眼用吸込口ｏ９から外層用送ｒｆＬ機（６）
、内層用送風機（６）によりそれぞれ外ｒｆＩＪ（７）
、内層α３に帰還でる第４図に示す空気循環経路を辿る
。This cycle is a defrosting operation that includes refrigerant recovery.The hot gas is condensed and liquefied in the inner layer heat exchanger α℃, which serves as a condenser, to become a high-pressure liquid refrigerant, and the pressure is reduced by a pressure reducing valve (b) to become a low-pressure liquid refrigerant. It is evaporated in the outer layer heat exchanger (5). Along with the condensation and liquefaction of the hot gas, the inner layer heat exchanger αυ
The frost adhering to the air will gradually melt, and the temperature of the air surrounding the inner layer will gradually rise. The circulating air that has passed through the inner layer heat exchanger is interrupted in the inner layer 01 through the first danopa (4t') and flows from the first window (4C) to the outer layer (7). It merges with the outer layer circulating air. The combined circulating air exchanges heat with the low-pressure liquid refrigerant passing through the outer layer heat exchanger (5) and is cooled. This cooled circulating air is transferred to the second damper (
4B), most of it flows from the second window (4C) to the inner layer Q3, and a part of it flows through the second damper (4B).
and the heat insulating wall (21) to directly flow through the outer layer (5), forming the inner layer air outlet 04 and the outer layer air outlet (9), respectively.
) and the outer layer feed rfL machine (6) from the outer layer eye suction port o9.
, the outer rfIJ (7) by the inner layer blower (6), respectively.
, following the air circulation path shown in FIG. 4 which returns to the inner layer α3.
除霜運転の進行に伴ない内層用熱交換器０１）の霜が溶
けると、一定時間例えばこの秒間電磁弁（ＡＱを閉じ、
流路切替弁（１）の出口ボートのが（ト）に切り替石と
、内層用熱交換２ま（Ｉｌｌ 、、！−夕（層用軌交換
器（５）につ゛、・って還・ろ残留冷媒を逆上弁筒、気
液分と１器２うを通過させ圧縮機曲により、熱交換器ω
、受液器Ｑ℃に回収する第６図に太線で示す冷媒回収サ
イクルとなる。この冷媒回収サイクルの所定時間経過後
、電磁弁−，穂が開き電磁弁（至）が閉じ、第１、第２
両ダンパ（４Ａ）、（４Ｂ）が閉まると第１図及び第２
図で示した冷却運転となる。As the defrosting operation progresses, when the frost on the inner layer heat exchanger 01) melts, the solenoid valve (AQ) is closed for a certain period of time, for example, for this second.
The outlet boat of the flow path switching valve (1) is connected to the switching stone (G) and the inner layer heat exchanger 2 (Ill,...! - evening) (to the layer rail exchanger (5),... The residual refrigerant from the filtration is passed through the reverse valve cylinder, the gas and liquid components, and the compressor is turned into a heat exchanger ω.
, the refrigerant recovery cycle shown by the thick line in FIG. After a predetermined period of time has elapsed in this refrigerant recovery cycle, the solenoid valves open, the solenoid valves close, and the first and second solenoid valves open.
When both dampers (4A) and (4B) are closed, the
The cooling operation is as shown in the figure.
上記低温ショーケース（１）の運転方法によれば、冷却
運転時には、第１．第２両ダンパ（４Ａ）（４Ｂ）が閉
じているので、開口（３）に温度の異なるエアーカーテ
ン（ＣＡ）（ＧＡ）を形成することができろ。又除霜運
転時には、第１、第２両ダンパ（４Ａ） （４Ｂ）を開
け、ホットガスを内°要用熱交換器ｎｎで、霜及び循環
空気と熱交換させて縦縞液化した後、この液冷媒を外層
用熱交換器（５）で前記循環空気と熱交換させて蒸発気
化するので、圧縮後世１への液バツク防止が図れ、又、
内層α３の循環空気は内層用熱交換器（１１）で暖めら
れた後、第１窓（４Ｃ）から外層（７）に流れ、外層用
熱交換器（５）で冷却されて外気より低い温度となった
後、第２窓（４Ｄ）から内１５０３に戻りエアーカーテ
ン（ＣＡ）として形成されるので、冷却運転時と同様に
温度の低いエアーカーテン（ＣＡ）で貯Ｍ、室Ｑ７）の
冷気団を外気から保腰して貯蔵室鶴の昇温幅を小さくす
ることができろ。According to the operating method of the low-temperature showcase (1), during the cooling operation, the first. Since both second dampers (4A) (4B) are closed, air curtains (CA) (GA) with different temperatures can be formed in the opening (3). During defrosting operation, both the first and second dampers (4A) (4B) are opened, and the hot gas is exchanged with frost and circulating air to liquefy vertical stripes in the internal heat exchanger. Since the liquid refrigerant is evaporated by exchanging heat with the circulating air in the outer layer heat exchanger (5), liquid backflow to the compression stage 1 can be prevented, and
The circulating air in the inner layer α3 is heated by the inner layer heat exchanger (11), flows through the first window (4C) to the outer layer (7), is cooled by the outer layer heat exchanger (5), and has a lower temperature than the outside air. After that, the air returns from the second window (4D) to the interior 1503 and is formed as an air curtain (CA), so that the cold air in the room Q7 is stored in the low temperature air curtain (CA) as in the case of cooling operation. It would be possible to insulate the group from the outside air and reduce the range of temperature rise in the storage room Tsuru.
又、第１ダンパ（４人）を内層側に開放、第２ダンハ（
４Ｂ）を外層側に開放することをより、この両ダンパを
循環空気の指向板として作用させることができ、循環空
気の流れ特性が良くなる。In addition, the first damper (4 people) is opened to the inner layer side, and the second damper (4 people) is opened to the inner layer side.
By opening 4B) to the outer layer side, both dampers can act as directing plates for the circulating air, improving the flow characteristics of the circulating air.
（へ） 発明の効果
以上の如く本発明は、内層用熱交換器の除霜運転時には
、ホットガスで内層用熱交換器の霜を溶かしつつ、この
内層用熱交換器で得られた液冷媒を外層用熱交換器で蒸
発気化させ、内層用熱交換器で暖められた循環空気を第
１窓を通して外層に導き、外層用熱交換器で冷却し、内
層用吹出口から開口に吹き出してエアーカーテンを形成
するため下記に列挙する効果が生じる。(f) Effects of the Invention As described above, the present invention provides the advantage that during the defrosting operation of the inner heat exchanger, the liquid refrigerant obtained in the inner heat exchanger is melted using hot gas. The circulating air heated by the inner layer heat exchanger is guided to the outer layer through the first window, cooled by the outer layer heat exchanger, and then blown out from the inner layer air outlet to the opening. Due to the formation of the curtain, the effects listed below occur.
■ 暖かくなった内層用熱交換器を通過する循環空気を
、外層用熱交換器により包囲空気、即ち外気より低℃・
温度に冷却してエアーカーテンとするため、内層用熱交
換器で暖められた循環空気が直接開口に吹き出されるこ
とはなく、外気より温度の低いエアーカーテンを開口に
形成することができ、この結果除１時の貯蔵室の昇温幅
を小さくし、除霜時におけろ貯蔵商品の品質低下−１Ｐ
変質を防止できる。■ The circulating air passing through the warmer inner layer heat exchanger is converted to ambient air, which is lower in temperature than the outside air, by the outer layer heat exchanger.
Since the circulating air warmed by the inner layer heat exchanger is not blown out directly to the opening, an air curtain with a lower temperature than the outside air can be formed at the opening. Result Reduce the temperature rise in the storage room during defrosting to reduce the quality of stored products during defrosting - 1P
Can prevent deterioration.
■ 除霜運転中、内層用熱交換器を通過する循環空気の
加熱分を外層用熱交換器により冷却するため貯Ｅｌ呈の
昇＠幅を小さくできるので、再冷却運転開始後において
貯蔵室が所定の温度に冷却される迄（プルダウン）の時
間が短かくなり冷即効来が同上する。■ During defrosting operation, the heated portion of the circulating air passing through the inner layer heat exchanger is cooled by the outer layer heat exchanger, so the rise in storage temperature can be reduced, so the storage room will be The time required for the product to be cooled to a predetermined temperature (pulldown) is shortened, resulting in an immediate cooling effect.
■ 内層用熱交換器で凝縮液化された冷ｆＡを外層用熱
交換器で蒸発気化させるので、除霜貯槽を使用すること
なく・夜バック防止が図れ、冷凍装置の構成が簡単とな
る。■ Since the cold fA condensed and liquefied in the inner layer heat exchanger is evaporated and vaporized in the outer layer heat exchanger, there is no need to use a defrost storage tank, night baggage can be prevented, and the configuration of the refrigeration system is simplified.
図面は何れも本発明低温ショーケースの運転万法につ・
かる実施例を示し、第１図は低温ショーケースのダンパ
開時のｆｔＩＪＴ而図な、面４図は低温ブローケースの
ダンパ開時の縦断面図を示す。又第２図、第３図、′ｉ
Ａ５図、第６図は低温ショーケースな冷却する冷凍装置
の冷媒回路図である。
（３）・・・開口、 （４Ａ）、（４Ｂ）・・・ダン
パ、 （５）・・・外層用熱交換器、（６）・・・外層
用送風機、 （７）・・・外層。
Ｏｌ）・・・内層用熱交換器、 ■・・・内層用送風機
、α４・・・内層、 （ＣＡ）（ＧＡ）・・・エアー
カーテン。
出願人 三洋電機株式会社 外１名
代理人 弁理士 佐 野 静 夫
第１図
第４図
第２図
第３ 図
第５図
第６図All the drawings show how to operate the low temperature showcase of the present invention.
FIG. 1 shows a diagram of the ftIJT when the damper of the low-temperature showcase is open, and FIG. 4 shows a vertical sectional view of the low-temperature blow case when the damper is open. Also, Fig. 2, Fig. 3, 'i
Figures A5 and 6 are refrigerant circuit diagrams of a refrigeration device that cools a low-temperature showcase. (3)...Opening, (4A), (4B)...Damper, (5)...Outer layer heat exchanger, (6)...Outer layer blower, (7)...Outer layer. Ol)... Heat exchanger for inner layer, ■... Blower for inner layer, α4... Inner layer, (CA) (GA)... Air curtain. Applicant: Sanyo Electric Co., Ltd. and 1 other representative: Shizuo Sano, patent attorney Figure 1 Figure 4 Figure 2 Figure 3 Figure 5 Figure 6
Claims (1)
し、冷却運転時、開口に循環空気による少なくとも２層
のエアーカーテンを形成してなる低温ショーケースにお
いて、内層と外層とを仕切る第１区画板に、２ケ所で内
外両層を連通させる第１、第２両窓と、この両窓を夫々
閉塞する開閉自在な第１、第２両ダンパとを設け、除霜
運転時、内層用熱交換器で凝縮液化された冷媒を外層用
熱交換器で蒸発気化させると共に、第１、第２両ダンパ
を開放して内層用熱交換器を通過した循環空気を第１窓
を通して外層に導き、外層用熱交換器を通過させた後、
第２窓を通して内層に再度導き、前記開口に少なくとも
１層のエアーカーテンを形成してなる低温ショーケース
の運転方法。 ２、前記第１ダンパは内層側に開放、第２ダンパは外層
側に開放する特許請求の範囲第１項記載の低温ショーケ
ースの運転方法。[Claims] 1. A low-temperature showcase in which a heat exchanger and a blower are arranged in each of the inner layer and the outer layer, and at least two layers of air curtains are formed by circulating air at the opening during cooling operation, A first partition plate that partitions the inner layer and the outer layer is provided with first and second windows that communicate both the inner and outer layers at two locations, and first and second dampers that can be opened and closed to respectively close the windows. During defrosting operation, the refrigerant condensed and liquefied in the inner layer heat exchanger is evaporated and vaporized in the outer layer heat exchanger, and both the first and second dampers are opened to release circulating air that has passed through the inner layer heat exchanger. is introduced into the outer layer through the first window, and after passing through the outer layer heat exchanger,
A method of operating a low-temperature showcase, comprising guiding the air back to the inner layer through a second window and forming at least one layer of air curtain in the opening. 2. The method of operating a low temperature showcase according to claim 1, wherein the first damper is opened to the inner layer side, and the second damper is opened to the outer layer side.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22373784A JPS61101784A (en) | 1984-10-24 | 1984-10-24 | Method of operating cryostatic showcase |
| US06/790,268 US4648247A (en) | 1984-10-24 | 1985-10-22 | Low-temperature showcase |
| CA000493573A CA1240165A (en) | 1984-10-24 | 1985-10-22 | Low-temperature showcase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22373784A JPS61101784A (en) | 1984-10-24 | 1984-10-24 | Method of operating cryostatic showcase |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18051888A Division JPH0229583A (en) | 1988-07-20 | 1988-07-20 | Low-temperature showcase |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61101784A true JPS61101784A (en) | 1986-05-20 |
| JPH0450510B2 JPH0450510B2 (en) | 1992-08-14 |
Family
ID=16802899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22373784A Granted JPS61101784A (en) | 1984-10-24 | 1984-10-24 | Method of operating cryostatic showcase |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61101784A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6365273A (en) * | 1986-09-08 | 1988-03-23 | 三洋電機株式会社 | Low-temperature showcase |
| JPH0229583A (en) * | 1988-07-20 | 1990-01-31 | Sanyo Electric Co Ltd | Low-temperature showcase |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5770371A (en) * | 1980-10-21 | 1982-04-30 | Fuji Electric Co Ltd | Refrigerated open show case |
-
1984
- 1984-10-24 JP JP22373784A patent/JPS61101784A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5770371A (en) * | 1980-10-21 | 1982-04-30 | Fuji Electric Co Ltd | Refrigerated open show case |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6365273A (en) * | 1986-09-08 | 1988-03-23 | 三洋電機株式会社 | Low-temperature showcase |
| JPH0229583A (en) * | 1988-07-20 | 1990-01-31 | Sanyo Electric Co Ltd | Low-temperature showcase |
| JPH0534589B2 (en) * | 1988-07-20 | 1993-05-24 | Sanyo Electric Co |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0450510B2 (en) | 1992-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH02101368A (en) | Method of operating low temperature show case | |
| CN108458511A (en) | It is a kind of to be in direct contact condensation refrigerating system with hot gas defrosting | |
| CN109564070A (en) | Heat exchanger and the refrigeration system for using it | |
| CN107499089A (en) | A kind of electric automobile heat-pump air-conditioning system and its method of work | |
| JPS61101784A (en) | Method of operating cryostatic showcase | |
| JPS5826511B2 (en) | Defrosting device for refrigerators | |
| JPH09119725A (en) | Binary refrigerator | |
| JPH0229583A (en) | Low-temperature showcase | |
| JPH05133635A (en) | Cold accumulation type air conditioning apparatus | |
| JPS61280368A (en) | Operation system of cold showcase | |
| JPH0337117B2 (en) | ||
| JPS6229905Y2 (en) | ||
| JPH0744923Y2 (en) | Supercooler for ice storage device for air conditioning | |
| JPS60108671A (en) | Operation system of open showcase | |
| JPS6143194Y2 (en) | ||
| JPH0451750B2 (en) | ||
| JPH0613947B2 (en) | How to operate the low temperature showcase | |
| JP2002098428A (en) | Refrigerating/freezing apparatus | |
| JPS6284274A (en) | Method of operating air conditioner | |
| JPS625069A (en) | Operation system of low-temperature showcase | |
| JPS60233471A (en) | Heat pump type air conditioner | |
| JPS62175571A (en) | Method of operating low-temperature showcase | |
| JPH0481102B2 (en) | ||
| JPS6217569A (en) | Refrigerator | |
| JPS60108670A (en) | Operation system of open showcase |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |