JP2583618B2 - Operation control method for freezing and refrigeration open case - Google Patents

Operation control method for freezing and refrigeration open case

Info

Publication number
JP2583618B2
JP2583618B2 JP1283707A JP28370789A JP2583618B2 JP 2583618 B2 JP2583618 B2 JP 2583618B2 JP 1283707 A JP1283707 A JP 1283707A JP 28370789 A JP28370789 A JP 28370789A JP 2583618 B2 JP2583618 B2 JP 2583618B2
Authority
JP
Japan
Prior art keywords
cooler
blower
defrosting
air
cooling
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.)
Expired - Lifetime
Application number
JP1283707A
Other languages
Japanese (ja)
Other versions
JPH03144273A (en
Inventor
正志 桜井
斉 古沢
博三 山上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NIPPON KENTETSU KK
Mitsubishi Electric Corp
Original Assignee
NIPPON KENTETSU KK
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NIPPON KENTETSU KK, Mitsubishi Electric Corp filed Critical NIPPON KENTETSU KK
Priority to JP1283707A priority Critical patent/JP2583618B2/en
Publication of JPH03144273A publication Critical patent/JPH03144273A/en
Application granted granted Critical
Publication of JP2583618B2 publication Critical patent/JP2583618B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/22Refrigeration systems for supermarkets

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、冷凍冷蔵オープンショーケースに関し、例
えば除霜にホットガスを利用するものの運転制御方法に
係るものである。
Description: TECHNICAL FIELD The present invention relates to a freezing and refrigeration open showcase, and for example, relates to an operation control method for a device using hot gas for defrosting.

[従来の技術] 第2図乃至第4図は従来の冷凍冷蔵オープンショーケ
ースの一例を示す図で、第2図は実開昭61-114286号公
報に開示された冷凍冷蔵オープンショーケースの断面図
であり、(1)はケース本体、(2)は開口部、(3)
はケース本体(1)内を商品収納部(4)と冷却循環ダ
クト(6)とに区分するダクト板、(5)は冷気循環ダ
クト(6)の外側とケース本体(1)との間に保護ダク
ト(7)を形成するダクト板である。
[Prior Art] FIGS. 2 to 4 are views showing an example of a conventional refrigerated open showcase, and FIG. 2 is a cross section of the refrigerated open showcase disclosed in Japanese Utility Model Laid-Open No. 61-114286. It is a figure, (1) is a case main body, (2) is an opening part, (3)
Is a duct plate for dividing the inside of the case body (1) into a product storage section (4) and a cooling circulation duct (6), and (5) is between the outside of the cool air circulation duct (6) and the case body (1). It is a duct plate forming a protection duct (7).

冷却循環ダクト(6)の一部は区画板(10)によって
2つの通路(8)、(9)に区画されており、夫々の通
路(8)、(9)内には空気を循環する送風機(11
a)、(11b)と空気を冷却する冷却器(12a)、(12b)
が配設され、冷気循環ダクト(6)の吸込口(14)から
吸込んだ空気を冷却して吹出口(13)から吹出すよう構
成されている。
A part of the cooling circulation duct (6) is divided into two passages (8) and (9) by a partition plate (10), and a blower that circulates air in each passage (8) and (9). (11
a), (11b) and air coolers (12a), (12b)
Is arranged to cool the air sucked from the suction port (14) of the cool air circulation duct (6) and blow it out from the outlet (13).

又保護ダクト(7)内にも送風機(15)が配設されて
おり、吸込口(17)から吸込んだ空気を吹出口(16)か
ら吹出すように構成されている。
A blower (15) is also provided in the protection duct (7), and is configured to blow out the air sucked from the suction port (17) from the blowout port (16).

一方冷却器(12a)、(12b)の冷媒回路は、第3図に
示す様に図示されていないコンデンシングユニットから
の冷媒入口管(24)に対して液冷媒用電磁弁(18)、分
岐入口管(25)、(26)、膨張弁(19)、(20)を介し
て接続され、又出口管(29)、(30)、四方弁(21)、
(22)、集合管(34)を介してコンデンシングユニット
への冷媒戻り管(31)に接続されているとともに、コン
デンシングユニットからのホットガス入口管(32)が分
岐管(35)、(33)、前記四方弁(21)、(22)を介し
て前記出口管(29)、(30)に接続される様になってい
る。又冷却器の(12a)、(12b)の入口管(27)、(2
8)間には毛細管(23)が接続されている。
On the other hand, as shown in FIG. 3, the refrigerant circuit of the coolers (12a) and (12b) is provided with a solenoid valve (18) for liquid refrigerant and a branch to a refrigerant inlet pipe (24) from a condensing unit (not shown). Connected via inlet pipes (25), (26), expansion valves (19), (20), and outlet pipes (29), (30), four-way valve (21),
(22), connected to the refrigerant return pipe (31) to the condensing unit via the collecting pipe (34), and the hot gas inlet pipe (32) from the condensing unit is connected to the branch pipe (35), ( 33) and are connected to the outlet pipes (29) and (30) via the four-way valves (21) and (22). Also, the inlet pipes (27), (2) for the coolers (12a) and (12b)
8) A capillary (23) is connected between them.

以上の構成において、送風機(11a)、(11b)によっ
て吸込口(14)から吸い込まれた空気は冷却器の(12
a)、(12b)において冷却器の冷却管内を流れる冷媒と
熱交換して冷却された後、吹出口(13)から整流されて
吹出され、冷気によるエアカーテンを形成して商品収納
部(4)内に収納された商品を保冷する。この保冷性能
を向上させる為保護ダクト(7)を利用して送風機(1
5)により吸込口(17)から吸込んだ空気を吹出口(1
6)から吹出して冷気エアカーテンの外側に保護エアー
カーテンを形成する様にしている。
In the above configuration, the air sucked from the suction port (14) by the blowers (11a) and (11b) is
In (a) and (12b), after being cooled by heat exchange with the refrigerant flowing in the cooling pipe of the cooler, the air is rectified and blown out from the outlet (13) to form an air curtain of cool air to form the product storage section (4). Keep the items stored in the box) cool. In order to improve the cooling performance, a blower (1
The air sucked from the suction port (17) by the air outlet (1)
The protective air curtain is formed outside the cool air curtain by blowing from 6).

この様な保冷運転を長時間継続すると、冷却器(12
a)、(12b)に空気中の水分が凝縮して着霜を生じ、こ
れにより冷却能力が低下するとともに吹出口(13)から
吹出される冷気の流速が低下する為、冷気エアーカーテ
ンの形成ができなくなる。この為冷却器(12a)、(12
b)に着霜した霜の除霜が必要となるが、除霜中も保冷
性能を維持する為、冷却器を上記の通り複数個設け、一
方の冷却器を除霜しながら他方の冷却器で冷却を継続で
きる様にして交互に除霜する様にしている。
If such a cool operation is continued for a long time, the cooler (12
a), (12b) condensation of moisture in the air to form frost, which reduces the cooling capacity and reduces the flow rate of the cool air blown out from the outlet (13), thus forming a cool air curtain. Can not be done. Therefore, the cooler (12a), (12
Defrosting of the frost formed in b) is necessary, but in order to maintain the cooling performance during defrosting, a plurality of coolers are provided as described above, and one of the coolers is defrosted while the other is being defrosted. To continue cooling and defrost alternately.

第4図は一定時間毎に冷却器の除霜を行う様にした時
の運転タイムチャートを示すもので、時刻T1において
は冷却器(12a)、(12b)はともに冷却運転されてお
り、この時送風機(11a)、(11b)はともに運転され、
液冷媒用電磁弁(18)は通電されて開となっている。こ
の為コンデンシングユニットからの液冷媒は、第3図に
実線矢印で示す様に液冷媒入口管(24)から液冷媒用電
磁弁(18)、分岐入口管(25)、(26)を経て膨脹弁
(19)、(20)に至り、ここで減圧されて冷却器(12
a)、(12b)に入り空気を冷却してガス冷媒となり、出
口管(29)、(30)、四方弁(21)、(22)、集合管
(34)、冷媒戻り管(31)を経てコンデンシングユニッ
トへ戻る。
Figure 4 is shows the operation time chart when the manner defrosted the cooler at regular intervals, the cooler at time T 1 (12a), (12b ) are both cooling operation, At this time, both the blowers (11a) and (11b) are operated,
The liquid refrigerant solenoid valve (18) is energized and is open. Therefore, the liquid refrigerant from the condensing unit passes through the liquid refrigerant inlet pipe (24), the liquid refrigerant solenoid valve (18), and the branch inlet pipes (25) and (26) as shown by solid arrows in FIG. The expansion valves (19) and (20) are reached.
a), (12b) enters and cools the air to become a gas refrigerant. The outlet pipe (29), (30), the four-way valve (21), (22), the collecting pipe (34), and the refrigerant return pipe (31) Return to the condensing unit.

一定の時間が経過し、時刻T2になると、冷却器(12
a)は除霜運転となり、送風機(11a)は停止するととも
に液冷媒用電磁弁(18)は閉、四方弁(21)は通電され
て破線の如く切替り、更にホットガス用電磁弁(36)が
開となって、コンデンシングユニットからのホットガス
は第3図に破線矢印で示す様にホットガス入口管(32)
から電磁弁(36)、分岐管(35)、四方弁(21)、出口
管(29)を経て冷却器(12a)に入り、ここで放熱して
霜を溶かし液化した後、毛細管(23)を通り減圧されて
冷却器(12b)に入り、ここで空気を冷却してガス冷媒
となり出口管(30)、四方弁(22)、集合管(34)、冷
媒戻り管(31)を経てコンデンシングユニットに戻り除
霜が行われる。除霜が終了すると、送風機(11a)が運
転を開始し、水切り運転に入る。その後t1時間経過す
ると、冷媒は再び第3図に実践矢印で示す様に流れ、冷
却器(12a)は冷却運転となる。なお、冷却器(12b)の
除霜も同様にして行われる。
Predetermined time has elapsed, at time T 2, the cooler (12
a) is a defrosting operation, the blower (11a) is stopped, the liquid refrigerant solenoid valve (18) is closed, the four-way valve (21) is energized and switched as indicated by the broken line, and the hot gas solenoid valve (36) is switched off. ) Is opened and the hot gas from the condensing unit flows through the hot gas inlet pipe (32) as shown by the dashed arrow in FIG.
After entering the cooler (12a) through the solenoid valve (36), branch pipe (35), four-way valve (21), and outlet pipe (29), heat is released here to melt frost and liquefy, then the capillary (23) The air is decompressed and enters the cooler (12b), where it cools the air and turns into gas refrigerant. The condensin passes through the outlet pipe (30), the four-way valve (22), the collecting pipe (34), and the refrigerant return pipe (31). Returning to the unit, defrosting is performed. When the defrosting is completed, the blower (11a) starts operating and enters a draining operation. After a lapse of t 1 , the refrigerant flows again as shown by the practice arrow in FIG. 3, and the cooler (12a) starts the cooling operation. The defrosting of the cooler (12b) is performed in the same manner.

[発明が解決しようとする課題] 従来のオープンショーケースは以上の様に運転制御さ
れていたので、除霜終了後の除霜側送風機の運転開始
時、除霜側冷却器付近の露点温度の高い高温多湿の空気
が、他方の冷却運転中の冷却器を通過した露点温度の低
い低温多湿の空気と混合して吹出口から吹き出されるた
め、吹出口部分の空気は過飽和状態となり霧が発生す
る。そのため、一時的に庫内の商品が見えなくなり展示
効果をそこなうという問題点があった。
[Problems to be Solved by the Invention] Since the operation of the conventional open showcase is controlled as described above, when the operation of the defrost-side blower starts after the completion of the defrost, the dew point temperature near the defrost-side cooler is reduced. The high-temperature, high-humidity air is mixed with the low-temperature, high-humidity air with a low dew point that has passed through the other cooler during the cooling operation, and is blown out from the outlet. I do. For this reason, there is a problem that the goods in the refrigerator are temporarily hidden from view and the display effect is lost.

本発明は上記のような問題点を解決するためになされ
たもので、店舗の開店中(ショーケース照明の点灯時)
は陳列効果をそこなう霧の発生をなくすようにし、さら
に他の形態では開店中の霧の発生をなくすと共に店舗の
閉店中(ショーケース照明の消灯時)は、効率よく除霜
をすることができる冷凍冷蔵オープンショーケースの運
転制御方法を提供しようとするものである。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and is performed while a store is open (when showcase lighting is turned on).
Can prevent the generation of fog that impairs the display effect, and in other forms, can prevent the generation of fog during opening and can efficiently defrost when the store is closed (when the showcase lighting is turned off). It is an object of the present invention to provide a method for controlling the operation of a refrigerated open showcase.

[課題を解決するための手段] 本発明は前記した問題点を解決するため、ケース本体
内に形成した冷却循環ダクトの一部を複数の通路に区画
して夫々の通路に送風機及び冷却器を配設し、予め設定
された時間毎に前記送風機の運転を停止させて前記冷却
器の少なくとも1つを除霜しながら他の冷却器で冷却運
転を行うようにした冷凍冷蔵オープンショーケースの運
転制御方法において、除霜後の前記冷却器の冷却運転が
再開してから予め設定された時間経過後に、前記送風機
が運転を開始する第1の制御手段と、除霜後、前記送風
機が予め設定された時間運転を開始した後、前記冷却器
が冷却運転を再開する第2の制御手段と、のどちらか一
方を選択して制御することを特徴とするものである。
Means for Solving the Problems In order to solve the above-mentioned problems, the present invention divides a part of a cooling circulation duct formed in a case main body into a plurality of passages and arranges a blower and a cooler in each passage. An operation of a refrigerated open showcase that is arranged and stops the operation of the blower at predetermined time intervals and performs a cooling operation with another cooler while defrosting at least one of the coolers. In the control method, a first control means for starting the operation of the blower after a preset time has elapsed after the cooling operation of the cooler after defrosting is restarted, and the blower is set in advance after defrosting. After starting the operation for the set time, the cooler selects and controls one of the second control means and the second control means for restarting the cooling operation.

[作用] 本発明による運転制御方法では、店舗の開店中(ショ
ーケース照明の点燈時)は除霜側の送風機を遅延させて
運転を開始するようにしたことにより、除霜側冷却器付
近の高温多湿の空気を一旦冷却器で除湿して、低温多湿
の露点温度の低い空気にしてから送風機の運転が開始さ
れる。また、第2の制御手段を選択することにより店舗
の閉店中(ショーケース照明の消灯時)は除霜終了後、
一定時間除霜側の送風機のみを運転し、除霧をより確実
に行うことができる。
[Operation] In the operation control method according to the present invention, when the store is opened (when the showcase lighting is on), the blower on the defrost side is delayed to start the operation, so that the vicinity of the defrost side cooler is provided. The high-temperature and high-humidity air is once dehumidified by a cooler to make low-temperature and high-humidity air with a low dew point, and then the operation of the blower is started. Further, by selecting the second control means, when the store is closed (when the showcase lighting is turned off), after the defrosting is completed,
By operating only the blower on the defrost side for a fixed time, demisting can be performed more reliably.

[発明の実施例] 以下本発明の一実施例を図面により説明する。Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

本発明は第1図に運転タイムチャートを示すように、
店舗の開店中(ショーケース照明の点灯時)は、除霜終
了後、冷却器が冷却運転を開始してからt2時間経過後
に除霜側送風機を運転する制御手段が採られている。さ
らに前記制御手段に加え、除霜終了後、t1時間除霜側
送風機のみ運転し、t1時間経過した後に冷却器の冷却
運転を再開する第2の制御手段を備え、それらの制御手
段のいずれか一方を選択し得るものであり、これ以外の
構成は前記した従来例と同様であるので説明を省略す
る。
The present invention, as shown in the operation time chart in FIG.
During the opening of the store (when the showcase lighting is turned on), a control means for operating the defrost-side blower after a lapse of t 2 hours after the cooling operation of the cooler is started after the defrosting is completed. Further added to the control means, after the completion of defrosting, it operated only t 1 hour defrosting blower, comprising a second control means resumes the cooling operation of the cooler after a lapse t 1 hour, their control means Either one can be selected, and the other configuration is the same as that of the above-described conventional example, and the description is omitted.

この様な構成において、店舗の開店中(ショーケース
照明点灯時)は時刻T1においては従来例と全く同様に
冷却器(12a)、(12b)とも冷却運転をしている。ま
た、時刻T2においては、従来例と同じ様に冷却器(12
a)は除霜状態となり送風機(11a)は停止する。除霜が
終了すると、冷媒は再び第3図の実線の矢印で流れ、冷
却器(12a)は冷却運転となる。この時、送風機(11a)
は冷却器(12a)が冷却運転開始後t2時間経過するまで
は停止している。従って、t2時間の間は冷却器(12a)
のみが運転しているため、冷却器(12a)周辺の露点温
度の高い高温多湿の空気は、冷却器(12a)により除湿
され、露点温度の低い低温多湿の空気となる。なお、冷
却器(12b)の除霜も同様にして行われる。また、店舗
の閉店中は上記第2の制御手段を選択するようにすれ
ば、店舗の閉店中(ショーケース照明消灯時)は、除霜
終了後にあって除霜時停止した送風機(12a)が冷却器
(12a)が冷却運転に入る前にt1時間運転し、t1時間
経過した後冷却器(12a)の冷却運転が開始されるよう
になっている以外は店舗開店中と同様である。また、冷
却器(12b)も同様である。
In this configuration, during opening of the shop (when the showcase illumination lit) exactly as cooler and the conventional example at time T 1 (12a), it has a cooling operation with (12b). Also, at time T 2, in the same manner as conventional cooler (12
a) becomes the defrost state, and the blower (11a) stops. When the defrost is completed, the refrigerant flows again as indicated by the solid-line arrow in FIG. 3, and the cooler (12a) starts the cooling operation. At this time, blower (11a)
Is stopped until the elapse of t 2 hours after the start of the cooling operation of the cooler (12a). Therefore, the cooler (12a) during the time t 2
Since only the cooler (12a) is operated, the high-temperature and high-humidity air having a high dew point temperature around the cooler (12a) is dehumidified by the cooler (12a) to be low-temperature and high-humidity air having a low dew point temperature. The defrosting of the cooler (12b) is performed in the same manner. If the second control means is selected while the store is closed, the blower (12a) which is stopped after the defrost after the end of the defrost is provided when the store is closed (when the showcase lighting is turned off). cooler (12a) is t 1 hour drove before entering the cooling operation, except that the cooling operation of t 1 hour elapsed after cooler (12a) is adapted to be started is the same as in store openings . The same applies to the cooler (12b).

[発明の効果] 以上のように、本発明によれば店舗の開店中(ショー
ケース照明点灯時)除霜側の冷却器周辺の露点温度の高
い高温多湿の空気を一旦除湿したのち送風機を運転する
構成としたので、送風機の運転開始により、冷却側の冷
却器から吹き出される冷気と混合しても過飽和状態とは
ならず吹出口からの霧の発生がなくなり、その結果、展
示効果をそこなうことがなくなり、また店舗の閉店中
(ショーケース照明消灯時)は、除霜の確実性が向上す
る。
[Effects of the Invention] As described above, according to the present invention, during opening of a store (when the showcase lighting is turned on), the high-temperature and high-humidity air having a high dew point around the defrost-side cooler is once dehumidified, and then the blower is operated. When the blower is started to operate, it does not become supersaturated even if it mixes with the cool air blown out from the cooler on the cooling side, so that no fog is generated from the outlet, and as a result, the display effect is lost. When the store is closed (when the showcase lighting is off), the reliability of defrosting is improved.

【図面の簡単な説明】[Brief description of the drawings]

第1図は本発明の一実施例を示す冷凍冷蔵オープンショ
ーケースの運転タイムチャト図、第2図乃至第4図はこ
の種冷凍冷蔵オープンショーケースの従来例を示すもの
で、第2図は冷凍冷蔵オープンショーケースの断面図、
第3図は冷媒配管系統図、第4図は運転タイムチャート
図である。 図中(1)はケース本体、(6)は冷気循環ダクト、
(11a),(11b)は送風機、(12a),(12b)は冷却器
FIG. 1 is an operation time chart of a refrigerated open showcase showing one embodiment of the present invention, and FIGS. 2 to 4 show a conventional example of this type of refrigerated open showcase, and FIG. Sectional view of a freezer refrigerated open showcase,
FIG. 3 is a refrigerant piping system diagram, and FIG. 4 is an operation time chart diagram. In the figure, (1) is a case body, (6) is a cool air circulation duct,
(11a) and (11b) are blowers, (12a) and (12b) are coolers

───────────────────────────────────────────────────── フロントページの続き (72)発明者 山上 博三 千葉県船橋市山手1丁目1番1号 日本 建鉄株式会社船橋製作所内 (56)参考文献 特開 平1−217172(JP,A) 特開 昭58−190674(JP,A) 実開 昭60−151074(JP,U) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hirozo Yamagami 1-1-1, Yamate, Funabashi-shi, Chiba Japan Inside the Funabashi Works of Kentei Corporation (56) References JP-A-1-217172 (JP, A) Japanese Patent Application Laid-Open No. Sho 58-19074 (JP, A)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】ケース本体内に形成した冷気循環ダクトの
一部を複数の通路に区画して夫々の通路に送風機及び冷
却器を配設し、予め設定された時間毎に前記送風機の運
転を停止させて前記冷却器の少なくとも1つを除霜しな
がら他の冷却器で冷却運転を行うようにした冷凍冷蔵オ
ープンショーケースの運転制御方法において、除霜後の
前記冷却器の冷却運転が再開してから予め設定された時
間経過後に、前記送風機が運転を開始する第1の制御手
段と、除霜後、前記送風機が予め設定された時間運転を
開始した後、前記冷却器が冷却運転を再開する第2の制
御手段と、のどちらか一方を選択して制御することを特
徴とする冷凍冷蔵オープンショーケースの運転制御方
法。
1. A part of a cool air circulation duct formed in a case body is divided into a plurality of passages, and a blower and a cooler are arranged in each passage, and the operation of the blower is performed at predetermined time intervals. In the operation control method for a freezer and refrigerated open showcase, wherein the cooling operation is performed by another cooler while being stopped and at least one of the coolers is defrosted, the cooling operation of the cooler after the defrosting is restarted. After a preset time has elapsed since the first control means, the blower starts operating, and after defrosting, after the blower starts operating for a preset time, the cooler performs a cooling operation. And a second control means for resuming the operation.
JP1283707A 1989-10-31 1989-10-31 Operation control method for freezing and refrigeration open case Expired - Lifetime JP2583618B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1283707A JP2583618B2 (en) 1989-10-31 1989-10-31 Operation control method for freezing and refrigeration open case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1283707A JP2583618B2 (en) 1989-10-31 1989-10-31 Operation control method for freezing and refrigeration open case

Publications (2)

Publication Number Publication Date
JPH03144273A JPH03144273A (en) 1991-06-19
JP2583618B2 true JP2583618B2 (en) 1997-02-19

Family

ID=17669042

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1283707A Expired - Lifetime JP2583618B2 (en) 1989-10-31 1989-10-31 Operation control method for freezing and refrigeration open case

Country Status (1)

Country Link
JP (1) JP2583618B2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58190674A (en) * 1982-04-28 1983-11-07 三洋電機株式会社 Cooling device
JPS60151074U (en) * 1984-03-19 1985-10-07 三菱電機株式会社 Frozen and refrigerated open case

Also Published As

Publication number Publication date
JPH03144273A (en) 1991-06-19

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