JPH0454873B2 - - Google Patents
Info
- Publication number
- JPH0454873B2 JPH0454873B2 JP60224320A JP22432085A JPH0454873B2 JP H0454873 B2 JPH0454873 B2 JP H0454873B2 JP 60224320 A JP60224320 A JP 60224320A JP 22432085 A JP22432085 A JP 22432085A JP H0454873 B2 JPH0454873 B2 JP H0454873B2
- Authority
- JP
- Japan
- Prior art keywords
- defrosting
- fan
- air
- cooler
- ventilation passage
- 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
Links
- 238000010257 thawing Methods 0.000 claims description 57
- 238000009423 ventilation Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Freezers Or Refrigerated Showcases (AREA)
- Defrosting Systems (AREA)
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
この発明は冷却運転時に開口部に二層のエアー
カーテンが形成されるように内側および外側通風
路を設けて、除霜運転時に外側通風路のフアンを
停止し、外気を内側通風路に吸込ませるようにし
て除霜を行なう冷気循環形冷凍冷蔵オープンシヨ
ーケースの除霜運転方法に関する。[Detailed description of the invention] [Technical field to which the invention pertains] This invention provides inner and outer ventilation passages so that a two-layer air curtain is formed at the opening during cooling operation, and the outer ventilation passage during defrosting operation. The present invention relates to a defrosting operation method for a cold air circulation type frozen/refrigerated open show case in which defrosting is performed by stopping a fan and sucking outside air into an inner ventilation passage.
この種のオープンシヨーケースとして第４図に
示すような多段形のものが知られている。第４図
において、前面に商品取出用の開口部１ａを有す
る本体ケース１は断熱壁で形成された外箱２およ
び外箱２との間に適当な〓間を設けて配設された
内箱３を備え、内箱３の内側に棚板４により多段
に仕切られた陳列室５が形成されている。また、
外箱２と内箱３との間には前記〓間を２分するよ
うに隔壁６を設けて内側通風路７および外側通風
路８が形成されている。
As this type of open show case, a multi-stage type shown in FIG. 4 is known. In Fig. 4, the main case 1 has an opening 1a for taking out the product on the front side, an outer box 2 formed of a heat insulating wall, and an inner box disposed with an appropriate distance between the outer box 2 and the outer box 2. 3, and a display room 5 partitioned into multiple stages by shelf boards 4 is formed inside the inner box 3. Also,
A partition wall 6 is provided between the outer box 2 and the inner box 3 so as to divide the space into two, thereby forming an inner ventilation passage 7 and an outer ventilation passage 8.
前記内側通風路７の両端は開口部１ａの上下で
それぞれ吹出口７ａおよび吸込口７ｂをなし、外
側通風路８の両端はそれぞれ吹出口７ａおよび吸
込口７ｂに隣接しその外側に吹出口８ａおよび吸
込口８ｂを形成している。吹出口７ａおよび８ａ
にはハニカム状に通気孔を備えた空気整流体９が
装備されており、内側通風路７内には冷却器１
１、フアン１２、除霜ヒータ２１が、外側通風路
８内にはフアン１３が配設されている。 Both ends of the inner ventilation passage 7 form an air outlet 7a and an inlet 7b above and below the opening 1a, respectively, and both ends of the outer air passage 8 are adjacent to the air outlet 7a and an air inlet 7b, respectively, and have an air outlet 8a and an air inlet 7b on the outside thereof. A suction port 8b is formed. Air outlet 7a and 8a
is equipped with an air regulating fluid 9 equipped with honeycomb-shaped ventilation holes, and a cooler 1 is installed in the inner ventilation passage 7.
1, a fan 12, and a defrosting heater 21, and a fan 13 is disposed in the outside ventilation passage 8.
このオープンシヨーケースでは、冷却運転時に
は、フアン１２によつて室内空気が内側通風路７
を矢印Ａの方向に通流循環するとともに冷却器１
１に冷却されて冷気となり、この冷気が吹出口７
ａから吹出して開口部１ａに、陳列室５内を外気
から遮断するためのエアーカーテン１５を形成す
るとともに陳列室５内を冷却する。さらにフアン
１３によつて外側通風路８を矢印Ｂの方向に通流
循環する室内空気によりエアーカーテン１５を保
護するようにその外側にエアーカーテン１６が形
成され、陳列室５内がより効率よく冷却保冷され
る。 In this open case, during the cooling operation, indoor air is supplied to the inner ventilation passage 7 by the fan 12.
is passed through and circulated in the direction of arrow A, and the cooler 1
1 and becomes cold air, and this cold air flows through the air outlet 7.
Air is blown out from the opening 1a to form an air curtain 15 for shielding the inside of the display room 5 from outside air, and also to cool the inside of the display room 5. Furthermore, an air curtain 16 is formed on the outside of the air curtain 15 so as to protect the air curtain 15 by indoor air circulating through the outside ventilation passage 8 in the direction of arrow B by the fan 13, thereby cooling the inside of the display room 5 more efficiently. It is kept cold.
また、除霜運転時には冷却器１１の運転が停止
されるとともに、除霜ヒータ２１に通電される。
除霜はフアン１２により吸込口７ｂより吸い込ま
れた空気が除霜ヒータ２１により加熱されて冷却
器１１に生じた着霜を除去することによつて行な
われる。そして、冷却器出口空気温度または冷却
器１１全体の温度が除霜終了温度T2に達した時、
除霜サーモ等の感知で除霜を終了させている。 Further, during the defrosting operation, the operation of the cooler 11 is stopped, and the defrosting heater 21 is energized.
Defrosting is performed by removing frost formed on the cooler 11 by heating air sucked in from the suction port 7b by the fan 12 by the defrosting heater 21. Then, when the cooler outlet air temperature or the temperature of the entire cooler 11 reaches the defrosting end temperature T2 ,
Defrosting is terminated by sensing a defrosting thermostat, etc.
この場合、冷却器１１は加熱された空気によ
り、下方から除々に温度が上昇し、霜を溶かしな
がら除霜を行なうため除霜終了時には冷却器１１
の上方と下方では大幅な温度差が生じている。そ
して、次の冷却運転に入つたとき、内側通風路７
を流れる空気は冷却されるが、冷却器１１全体が
所定温度まで下がるには時間がかかるため、陳列
室５内の商品温度は冷却運転当初でもある一定時
間は上昇をしているため、商品にいたみが生じて
貯蔵期間の短縮や商品ロスが生じ易いという問題
がある。 In this case, the temperature of the cooler 11 gradually rises from below due to the heated air, and defrosting is performed while melting the frost, so when the defrosting is finished, the cooler 11
There is a large temperature difference between above and below. Then, when the next cooling operation starts, the inner ventilation passage 7
Although the air flowing through the cooler 11 is cooled, it takes time for the entire cooler 11 to reach a predetermined temperature. There is a problem in that damage occurs, which tends to shorten the storage period and cause product loss.
第５図は上述の温度変化特性を表わす説明図で
ある。 FIG. 5 is an explanatory diagram showing the above-mentioned temperature change characteristics.
この発明は上記の点に鑑み、除霜時間の短縮を
はかり、商品の温度上昇を押えて鮮度を長期間維
持する冷気循環形冷凍冷蔵オープンシヨーケース
の除霜方法を提供することを目的とする。
In view of the above points, it is an object of the present invention to provide a defrosting method for a cold air circulation type frozen/refrigerated open case that shortens the defrosting time, suppresses the temperature rise of the product, and maintains the freshness for a long period of time. .
この発明は上記目的を、前面または上面に開口
部を有する本体ケースの外箱と内箱との間に、冷
却器およびフアンを内蔵する内側通風路とフアン
を内蔵する外側通風路を設けて、冷却運転時には
前記それぞれのフアンによつて前記開口部に二層
のエアーカーテンを形成するようにした冷気循環
形冷凍・冷蔵オープンシヨーケースの除霜運転方
法を、除霜運転開始時には外気が内側通風路に吸
込まれやすいように外側通風路のフアンの運転を
停止し、除霜運転終了前に冷却器出口空気温度ま
たは冷却器の温度が除霜終了温度より低い所定温
度に達すると前記外側通風路のフアンの運転を開
始するようにして達成しようとするものである。
The present invention achieves the above object by providing an inner ventilation passage containing a cooler and a fan and an outer ventilation passage containing a fan between an outer box and an inner box of a main body case having an opening on the front or top surface. A method of defrosting operation of a cold air circulation type refrigeration/refrigeration open case in which a two-layer air curtain is formed in the opening by the respective fans during cooling operation, and outside air is ventilated inside at the start of defrosting operation. The operation of the fan in the outside ventilation path is stopped so that air is easily sucked into the air passage, and when the cooler outlet air temperature or the temperature of the cooler reaches a predetermined temperature lower than the defrosting end temperature before the defrosting operation ends, the outside ventilation path This is what we are trying to achieve by starting the operation of the fan.
つまり、除霜運転開始時と除霜運転終了前とで
異なつた除霜方法を用いることによつて上記目的
を達成しようとするもので、除霜運転開始時には
外側通風路のフアンの運転を停止して外気を内側
通風路に導入して冷却器の霜を溶かす外気導入空
気除霜を行ない、除霜終了前には外側通風路のフ
アンを運転に切換えて空気除霜を行なうようにし
たものである。なお、除霜ヒータは外側通風路の
フアンが停止している間だけ通電させるとよい。 In other words, the above objective is achieved by using different defrosting methods at the start of defrosting operation and before the end of defrosting operation, and the operation of the fan in the outside ventilation path is stopped at the start of defrosting operation. This system performs air defrosting by introducing outside air into the inner ventilation passage to melt the frost on the cooler, and before the defrosting is completed, the fan in the outside ventilation passage is switched on to perform air defrosting. It is. Note that it is preferable to energize the defrosting heater only while the fan in the outside ventilation path is stopped.
以下この発明の実施例を示す図面によりこの発
明を詳細に説明する。第１図はこの発明による除
霜運転開始時の空気の流れを示すもので、従来例
と同一部分には同一符号を付してその説明を省略
する。
The present invention will be described in detail below with reference to drawings showing embodiments of the invention. FIG. 1 shows the flow of air at the start of defrosting operation according to the present invention, and the same parts as in the conventional example are given the same reference numerals and the explanation thereof will be omitted.
第１図において除霜開始時には図示しないタイ
マーにより除霜ヒータ回路に電源が印加されて除
霜ヒータ２１及びフアン切替リレーに通電され外
側フアン１３は運転から停止に切換えらる。この
時の空気の流れを矢印で示す。除霜開始と同時に
外側フアン１３は停止するためエアーカーテン１
５を保護するエアーカーテン１６は消滅するため
エアーカーテン１５には外気が混入されて吸込口
７ｂに入る温度は上昇する。吸込まれた空気は除
霜ヒータ２１で加熱させられて、冷却器１１に生
じた着霜は除去される。そしてその空気は吹出口
７ａより吹出されてエアーカーテン１５を形成す
る。 In FIG. 1, at the start of defrosting, a timer (not shown) applies power to the defrosting heater circuit, energizing the defrosting heater 21 and fan switching relay, and switching the outer fan 13 from operation to stop. The air flow at this time is indicated by an arrow. Since the outer fan 13 stops at the same time as the defrosting starts, the air curtain 1
Since the air curtain 16 protecting the air filter 5 disappears, outside air is mixed into the air curtain 15, and the temperature entering the suction port 7b increases. The sucked air is heated by the defrosting heater 21, and the frost formed on the cooler 11 is removed. The air is then blown out from the outlet 7a to form an air curtain 15.
次に冷却器吹出空気温または冷却器全体の温度
がT6（０℃附近）すなわち冷却器に生じた霜が０
℃の水になつた時過熱防止サーモ２０が動作して
除霜ヒータ２１を無通電に、外側フアン１３を停
止から運転に切替る。そして、冷却器の水が流れ
きつた数分後に温度サーモが動作して除霜運転が
終わり冷却運転へと移行する。冷却運転時はいう
までもなく従来例と同様に第４図に示す矢印Ａお
よびＢの方向に通流循環して陳列室５内の商品を
冷却する。第２図はこの発明による運転方法にお
ける温度変化特性を示す説明図である。第３図は
外側フアン１３と除霜ヒータ回路の結線図を示す
もので、加熱防止サーモ２０の動作設定値は除霜
終了温度T2よりも低い温度に設定してある。外
側フアン１３を運転、停止する切替リレー１４は
加熱防止サーモ２０と除霜ヒータ２１の間に配設
されている。 Next, the cooler outlet air temperature or the temperature of the entire cooler is T 6 (nearly 0℃), which means that the frost that has formed in the cooler is 0.
When the temperature of the water reaches 0.degree. C., the overheating prevention thermometer 20 operates, de-energizes the defrosting heater 21, and switches the outside fan 13 from stop to operation. Then, a few minutes after the water in the cooler has finished flowing, the temperature thermostat operates, and the defrosting operation ends and the cooling operation begins. Needless to say, during the cooling operation, the products in the display room 5 are cooled by circulation in the directions of arrows A and B shown in FIG. 4, as in the conventional example. FIG. 2 is an explanatory diagram showing temperature change characteristics in the operating method according to the present invention. FIG. 3 shows a connection diagram between the outside fan 13 and the defrosting heater circuit, and the operating setting value of the heating prevention thermostat 20 is set to a temperature lower than the defrosting end temperature T2 . A switching relay 14 for operating and stopping the outside fan 13 is disposed between the heating prevention thermostat 20 and the defrosting heater 21.
この発明では従来の除霜ヒータだけによる除霜
方法に比べて、高温で高エネルギーを有する外気
を冷却器に導入しなおかつ、除霜ヒータで加熱す
ることによりさらに高エネルギーにして用いるの
で除霜時間は大幅に短縮される。また、冷却器に
生じた０℃の霜氷を0°の水にするのにこの高エネ
ルギーの空気で短時間に状態変化させた後、除霜
ヒータの通電停止および外側フアンの運転開始に
よる外気導入を停止することにより、高エネルギ
ーを有する空気が冷却器を通流することがなくな
り、第２図に示すごとく冷却器上部と下部の温度
差T3−T2分だけ（T3の値は第５図参照）の冷却
エネルギーが商品を下げるために有効に用いられ
商品の温度は急速に適正温度まで下がる。また、
除霜運転中における商品の温度上昇は従来に比べ
て、除霜方式が除霜途中で低エネルギーの除霜方
法に変るため、少なくなり、かつ除霜時の暖かい
除霜空気による商品への影響も少ないので商品の
温度上昇は最小限にとゞめることができ、商品の
いたみ変色が少なく、商品の鮮度を長期間維持す
ることが可能になる。
Compared to the conventional defrosting method using only a defrosting heater, this invention introduces outside air with high temperature and high energy into the cooler and heats it with the defrosting heater to make the energy even higher. will be significantly shortened. In addition, after using this high-energy air to change the state of frost ice at 0°C that has formed in the cooler into water at 0°C in a short period of time, the defrost heater is turned off and the outside fan is started to operate. By stopping the introduction, high-energy air no longer flows through the cooler, and as shown in Figure 2, the temperature difference between the upper and lower parts of the cooler is T 3 −T 2 (the value of T 3 is The cooling energy (see Figure 5) is effectively used to lower the product, and the temperature of the product is rapidly lowered to the appropriate temperature. Also,
Compared to conventional methods, the temperature rise of products during defrosting operation is reduced because the defrosting method changes to a low-energy defrosting method during defrosting, and the product is less affected by the warm defrosting air during defrosting. Since the temperature rise of the product can be kept to a minimum, the product is less susceptible to spoilage and discoloration, and the freshness of the product can be maintained for a long period of time.
第１図ないし第３図はこの発明の実施例を示す
もので、第１図はその除霜運転開始時の空気の流
れを示すオープンシヨーケースの断面図、第２図
はその温度変化特性を示す説明図、第３図はその
除霜ヒータ回路の結線図、第４図および第５図は
従来例を示すもので第４図はその除霜運転時の空
気の流れを示すオープンシヨーケースの断面図、
第５図はその温度変化特性を示す説明図である。
１……本体ケース、２……外箱、３……内箱、
４……棚板、５……陳列室、６……隔壁、７……
内側通風路、７ａ……吹出口、７ｂ……吸込口、
８……外側通風路、８ａ……吹出口、８ｂ……吸
込口、９……空気整流体、１１……冷却器、１２
……フアン、１３……フアン、１４……リレー、
１５……内側エアーカーテン、１６……外側エア
ーカーテン、２０……加熱防止サーモ、２１……
除霜ヒータ。
Figures 1 to 3 show an embodiment of the present invention. Figure 1 is a cross-sectional view of an open shower case showing the air flow at the start of defrosting operation, and Figure 2 shows its temperature change characteristics. Figure 3 is a wiring diagram of the defrosting heater circuit, Figures 4 and 5 are conventional examples, and Figure 4 is a diagram of the open shower case showing the air flow during defrosting operation. cross section,
FIG. 5 is an explanatory diagram showing the temperature change characteristics. 1...Main case, 2...Outer box, 3...Inner box,
4... Shelf board, 5... Display room, 6... Partition wall, 7...
Inner ventilation duct, 7a...Blowout port, 7b...Suction port,
8...Outside ventilation duct, 8a...Blowout port, 8b...Suction port, 9...Air conditioning fluid, 11...Cooler, 12
...Juan, 13...Juan, 14...Relay,
15...Inner air curtain, 16...Outer air curtain, 20...Heating prevention thermo, 21...
Defrost heater.
Claims (1)
の外箱と内箱との間に、冷却器およびフアンを内
蔵する内側通風路とフアンを内蔵する外側通風路
を設けて、冷却運転時には前記それぞれのフアン
によつて前記開口部に二層のエアーカーテンを形
成するようにした冷気循環形オープンシヨーケー
スにおける除霜運転方法であつて、除霜運転開始
時には外気が内側通風路に吸込まれやすいように
外側通風路のフアンの運転を停止するとともに除
霜ヒータに通電し、除霜運転終了前に冷却器出口
空気温度または冷却器温度が除霜終了温度より低
い所定温度に達すると前記外側通風路のフアンの
運転を開始するとともに除霜ヒータへの通電を停
止するようにしたことを特徴とする冷凍・冷蔵オ
ープンシヨーケースの除霜運転方法。1. An inner ventilation passage containing a built-in cooler and a fan and an outer ventilation passage containing a built-in fan are provided between the outer box and the inner box of the main case, which have openings on the front or top surface, so that during cooling operation, each of the above A defrosting operation method for a cold air circulation type open show case in which a two-layer air curtain is formed in the opening by a fan, and the method is such that outside air is easily sucked into the inner ventilation passage when defrosting operation starts. The operation of the fan in the outer ventilation passage is stopped and the defrosting heater is energized, and when the cooler outlet air temperature or the cooler temperature reaches a predetermined temperature lower than the defrosting end temperature before the defrosting operation ends, the fan in the outside ventilation passage is turned off. A defrosting operation method for a frozen/refrigerated open case, characterized in that power supply to a defrosting heater is stopped at the same time as the operation of a fan is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22432085A JPS6284280A (en) | 1985-10-08 | 1985-10-08 | Defrostation operating method of freezing-refrigeration openshowcase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22432085A JPS6284280A (en) | 1985-10-08 | 1985-10-08 | Defrostation operating method of freezing-refrigeration openshowcase |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6284280A JPS6284280A (en) | 1987-04-17 |
| JPH0454873B2 true JPH0454873B2 (en) | 1992-09-01 |
Family
ID=16811902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22432085A Granted JPS6284280A (en) | 1985-10-08 | 1985-10-08 | Defrostation operating method of freezing-refrigeration openshowcase |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6284280A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58217178A (en) * | 1982-06-10 | 1983-12-17 | 日本建鐵株式会社 | Defrosting operation method for freezing and refrigerating open showcase |
| JPS602864A (en) * | 1983-06-21 | 1985-01-09 | 富士電機株式会社 | Defrostation controller for refrigerating showcase |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53148373U (en) * | 1977-04-27 | 1978-11-22 |
-
1985
- 1985-10-08 JP JP22432085A patent/JPS6284280A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58217178A (en) * | 1982-06-10 | 1983-12-17 | 日本建鐵株式会社 | Defrosting operation method for freezing and refrigerating open showcase |
| JPS602864A (en) * | 1983-06-21 | 1985-01-09 | 富士電機株式会社 | Defrostation controller for refrigerating showcase |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6284280A (en) | 1987-04-17 |
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| R250 | Receipt of annual fees |
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| LAPS | Cancellation because of no payment of annual fees |