JPS61213568A - Method of controlling operation of refrigerator - Google Patents
Method of controlling operation of refrigeratorInfo
- Publication number
- JPS61213568A JPS61213568A JP5700885A JP5700885A JPS61213568A JP S61213568 A JPS61213568 A JP S61213568A JP 5700885 A JP5700885 A JP 5700885A JP 5700885 A JP5700885 A JP 5700885A JP S61213568 A JPS61213568 A JP S61213568A
- Authority
- JP
- Japan
- Prior art keywords
- defrosting
- temperature
- refrigerator
- compressor
- thermocycle
- 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.)
- Pending
Links
Landscapes
- Devices That Are Associated With Refrigeration Equipment (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
ν /′ISH& 聞 ν中温 シ IJ リ ノ −
hII r 楡 ^ 仏1虐ム dを対象にこ
の貯蔵物を保冷するように自動販売機。
冷凍ショーケース等に組み込んで使用する冷凍機の除霜
に係る運転制御方式に関する。ν /'ISH& νMedium temperature SI IJ Reno −
hII r elm ^ Buddha 1 torture vending machine to keep this stored items cold. This invention relates to an operation control method for defrosting a refrigerator used by being incorporated into a refrigerator showcase or the like.
まず頭記したアイスクリーム等の冷凍商品販売用の自動
販売機を例に、従来おける冷凍機の運転制御回路を第3
図に示して説明する。第3図において、lは冷凍機の圧
縮機、2は冷却器に配備された除霜ヒータ、3は庫内温
度調節用のサーモスタット、4は運転モードを保冷運転
と除霜との間で切換える除霜制御タイマである。かかる
冷凍機の運転制御回路は周知であり、保冷運転時にはタ
イマ接点が「冷却」側にあり、圧縮機lはサーモスタッ
ト3の動作でオン、オフ制御されて庫内収納商品の品温
をほぼ一定温度に保つように運転制御される。なおこの
サーモスタットによるオン。
オフ制御の運転モードをサーモサイクル運転と定義する
。一方、前記したタイマ4にはあらかじめ一日に1ない
し数回程度の所定の時間周期で除霜サイクルが蛤市六刺
、ア腑め一詮霊の陪聞鳴<a+審するとタイマ4の動作
によりタイマ接点が「冷却」から「除霜」に切換ねり、
冷凍機は保冷運転から除霜の運転モードに移行する。そ
してこの除霜に入ると圧縮機1が停止するとともに一方
では除霜ヒータ2が通電され、ヒータにより冷却器を強
制加熱して保冷運転中に冷却器に付着した霜の除霜を行
う。なおこの場合の除霜終了のタイミングはあらかじめ
タイマ2で設定するか、ないしは図示されてない除霜終
了サーモスタットの動作により強制的に除霜から再び保
冷運転に切換えられるように制御される。
しかして上記した従来の運転制御方式では、除霜サイク
ルとサーモサイクル運転による圧縮機のオン、オフ制御
とは時間的に同期せず全く別々に進行するために次記の
ような問題が発生るす、すなわち第4図は第3図の運転
制御回路に基づく運転動作のタイムチャートを表したも
のであり、保冷運転時にはサーモスタットのオン、オフ
動作に対応して圧縮機が運転、停止制御され、これによ
り庫内の冷凍商品の品温は例えば−18〜−20℃の範
囲で品温変動幅Ta −2deg内に収まるようにほぼ
一定温度に維持される。一方、所定の時間が経過してタ
イマ制御により保冷運転から除霜に切換ねると、この除
霜期間中に圧縮機が停止して除霜ヒータに通電される。
この場合に図示のようにサーモサイクル運転内で圧縮機
1が停止している時点t1に保冷運転から除霜に切換わ
ったとすると、それ以前のサーモサイクル運転で圧縮機
が停止となった時点t2からの時間分を合わせて除霜が
終了する時間t3までに連続して時間t2からFirst, let's take the above-mentioned vending machine for selling frozen products such as ice cream as an example.
This will be explained using a diagram. In Fig. 3, l is the compressor of the refrigerator, 2 is the defrosting heater installed in the cooler, 3 is the thermostat for regulating the temperature inside the refrigerator, and 4 is the operating mode that switches between cold preservation operation and defrosting. This is a defrost control timer. The operation control circuit of such a refrigerator is well known; during cold storage operation, the timer contact is on the "cooling" side, and the compressor l is controlled on and off by the operation of the thermostat 3 to keep the temperature of the products stored in the refrigerator almost constant. Operation is controlled to maintain the temperature. It is turned on by this thermostat. The off-control operation mode is defined as thermocycle operation. On the other hand, the above-mentioned timer 4 has a defrosting cycle set in advance at a predetermined time period of once or several times a day. The timer contact switches from "cooling" to "defrosting".
The refrigerator shifts from cold storage operation to defrosting operation mode. When defrosting begins, the compressor 1 is stopped, and at the same time, the defrosting heater 2 is energized, and the heater forcibly heats the cooler to defrost the frost that has adhered to the cooler during the cold storage operation. In this case, the timing of the end of defrosting is set in advance by the timer 2, or is controlled so that the defrosting operation is forcibly switched back to the cold storage operation by the operation of a defrosting end thermostat (not shown). However, in the conventional operation control method described above, the following problems occur because the defrosting cycle and the compressor on/off control by thermocycle operation are not synchronized in time and proceed completely separately. In other words, FIG. 4 shows a time chart of the operation based on the operation control circuit of FIG. 3. During cold storage operation, the compressor is controlled to operate and stop in response to the on/off operation of the thermostat. As a result, the temperature of the frozen product in the refrigerator is maintained at a substantially constant temperature, for example, within the range of -18 to -20° C. and within the product temperature fluctuation range Ta -2 degrees. On the other hand, when a predetermined period of time has elapsed and the cold preservation operation is switched to defrosting under timer control, the compressor is stopped during this defrosting period and electricity is supplied to the defrosting heater. In this case, if the cold storage operation is switched to defrosting at time t1 when the compressor 1 is stopped during thermocycle operation as shown in the figure, then at time t2 when the compressor was stopped during the previous thermocycle operation. Continuously from time t2 until time t3 when defrosting ends including the time from
【3まで
の間は圧縮機が停止し続け、この期間は冷却が行われず
に熱り−クさらには除霜熱が加わることになる。
この結果、庫内に収納されている冷凍商品の品温が上昇
し、除霜終了直前には品温が一15℃にもなる。なおこ
の例での除霜に伴う温度上昇幅Tbは保冷時の品温−2
0℃を基準に5degである。
ところで一般にアイスクリーム等の冷凍食品は食する際
の適正な品温が定められており、例えばアイスクリーム
では一20℃前後の温度が最適な品温とされ、品温か一
15℃程度まで上昇すると固さが柔らかになって舌ざわ
りが悪くなる他、乳成分の高いものではその風味も低下
する等品質が劣化する。このためにアイスクリームを自
動販売機内に収納して冷凍貯蔵する際にもこの適正品温
を維持することが良質の商品を客へ提供する意味で重要
である。しかも場合の品質低下の度合は貯蔵温度の変動
幅よりも、むしろ品温の絶対温度の上昇の方の影響が大
きく、このことから貯蔵物としてアイスクリーム等の冷
凍商品を庫内に収容して冷凍保存する場合には、冷凍機
の保冷運転、除霜を含めた全期間を通して品温の絶対温
度上昇を如何にして低く抑えるかが品質維持を図る上で
極めて重要なポイントである。
【発明の目的】
この発明は上記の点にかんがみなされたものであり、従
来の運転制御方式による欠点である除霜による品温の温
度の上昇を低く抑えてアイスクリーム等の冷凍商品の品
質維持が図れるようにした冷凍機の運転制御方式を提供
することを目的とする。The compressor continues to stop until [3], and during this period, no cooling is performed and heat is added to the compressor as well as defrosting heat. As a result, the temperature of the frozen products stored in the refrigerator rises, reaching 115 degrees Celsius just before the end of defrosting. In this example, the temperature rise width Tb due to defrosting is the product temperature during cold storage - 2
It is 5 degrees based on 0°C. By the way, in general, the appropriate temperature for eating frozen foods such as ice cream is determined. For example, for ice cream, the optimal temperature is around -20℃, and if the temperature rises to about -15℃, In addition to becoming soft and having a bad texture, those with a high milk content also deteriorate in quality, including a decrease in flavor. For this reason, it is important to maintain this appropriate product temperature even when storing ice cream in a vending machine and storing it frozen, in order to provide customers with high-quality products. Moreover, the degree of quality deterioration in the case of storage is more affected by the rise in the absolute temperature of the product than by the fluctuation range of the storage temperature.For this reason, it is difficult to store frozen products such as ice cream in the refrigerator. In the case of frozen storage, an extremely important point in maintaining quality is how to keep the absolute temperature rise of the product low throughout the entire period, including cold operation of the refrigerator and defrosting. [Purpose of the Invention] This invention was made in view of the above points, and maintains the quality of frozen products such as ice cream by suppressing the rise in product temperature due to defrosting, which is a drawback of conventional operation control methods. The purpose of the present invention is to provide an operation control method for a refrigerator that enables the following.
上記目的を達成するために、この発明は保冷運転から除
霜に移行する過程で除霜開始前に所定時間だけ圧縮機の
運転モードをサーモスタット制御によるサーモサイクル
運転から強制連続運転に切換えて運転制御することによ
り、除霜に入る前にはサーモサイクル運転の経過に左右
されることなく必ず庫内収納商品を充分に冷し込んでお
き、この状態から除霜を行うことによって除霜に伴う品
温の絶対温度上昇の低減を図るようにしたものである。In order to achieve the above object, the present invention controls the operation by switching the compressor operation mode from thermocycle operation under thermostat control to forced continuous operation for a predetermined period of time before the start of defrosting in the process of transitioning from cold storage operation to defrosting. By doing so, before starting defrosting, the products stored in the refrigerator are always cooled down sufficiently regardless of the progress of thermocycle operation, and by defrosting from this state, the products that will be defrosted will be removed. This is intended to reduce the absolute temperature rise.
【発明の実施例】
第1図はこの発明による冷凍機の運転制御回路、第2図
は第1図の回路による運転動作のタイムチャートを示す
ものであり、第3図と同一部材には同じ符合が付しであ
る。すなわち除霜タイマ4は「冷却」、「除霜」の他に
「強制冷却」の3段階の運転モードを設定するタイマ接
点を備えており、かつ「強制冷却」のタイマ接点は直接
圧縮機1に接続されている。またこの「強制冷却」の運
転モ−ドは、除霜開始時点を基準に除霜開始前に例えば
1時間程度とした所定時間だけ強制冷却が行われるよう
に設定されている。
次に上記回路による運転制御動作を第2図に付いて説明
する。すなわち保冷運転中は除霜への切換え前の特定な
時間帯を除いて第4図と同様にサーモサイクル運転が行
われる。そしてあらかじめ設定された除霜開始時間t1
に近ずくと、タイマ制御により除霜開始時点t1から時
間toだけ以前の時点t4でタイマ接点が「冷却」から
「強制冷却」に切換ねり、運転モードがサーモサイクル
運転から強制連続運転となる。さらにこの時点から時間
t。
が経過したところでタイマ接点が「除霜」に切換わって
除霜を開始する。この一連の制御動作により、庫内収納
商品の品温は除霜開始直前の段階で最低温度9例えば−
22℃まで低下するように冷え込むことになる。この温
度はサーモサイクル運転中の最低保冷温度と比べてさら
に温度幅Tcだけ低い値となる。従ってその後に行われ
る除霜に伴って品温が第4図の場合と同じ温度幅(5d
eg)程度上昇しても、その上昇温度の絶対値は高々−
17°Cにとどまり、第4図での除霜時の上昇温度−1
5℃に比べて低い温度に保持でき、またこれにより常に
高品質のアイスクリームを販売に供することができるよ
うになる。
なお、上記はアイスクリームの自動販売機を例に挙げて
述べたが、アイスクリーム以外の冷凍商品の自動販売機
、ないしは冷凍商品を扱うショーケースに実施適用して
も同様な効果を奏することができる。[Embodiments of the Invention] Fig. 1 shows a refrigerating machine operation control circuit according to the present invention, Fig. 2 shows a time chart of the operation operation by the circuit shown in Fig. 1, and the same parts as Fig. 3 are shown. The sign is attached. In other words, the defrost timer 4 is equipped with a timer contact for setting three operating modes: "cooling", "defrosting", and "forced cooling", and the timer contact for "forced cooling" is directly connected to the compressor 1. It is connected to the. The "forced cooling" operation mode is set so that forced cooling is performed for a predetermined period of time, for example, about one hour, before the start of defrosting, based on the time of starting defrosting. Next, the operation control operation by the above circuit will be explained with reference to FIG. That is, during the cold storage operation, the thermocycle operation is performed in the same manner as shown in FIG. 4, except for a specific time period before switching to defrosting. And the preset defrosting start time t1
When approaching , the timer contact switches from "cooling" to "forced cooling" at time t4, which is a time to before the defrosting start time t1, and the operation mode changes from thermocycle operation to forced continuous operation. Furthermore, from this point on, time t. When the time has elapsed, the timer contact switches to "defrost" and defrost begins. Through this series of control operations, the temperature of the products stored in the refrigerator reaches a minimum temperature of 9, for example, - at the stage just before the start of defrosting.
The temperature will drop to 22 degrees Celsius. This temperature is a value lower by the temperature range Tc than the lowest cold storage temperature during thermocycle operation. Therefore, with the subsequent defrosting, the product temperature will change to the same temperature range (5d
eg) Even if the temperature increases, the absolute value of the temperature increase is at most -
The temperature remains at 17°C, and the temperature rise during defrosting in Figure 4 is -1.
The temperature can be maintained at a temperature lower than 5° C., and this makes it possible to always sell high-quality ice cream. Although the above was described using an ice cream vending machine as an example, the same effect can be achieved even if it is applied to a vending machine for frozen products other than ice cream or a showcase that handles frozen products. can.
以上述べたようにこの発明によれば、保冷運転から除霜
に移行する過程で除霜開始前に所定時間だけ圧縮機の運
転モードをサーモスタット制御のサーモサイクル運転か
ら強制連続運転に切換えて運転制御するすることにより
、庫内収納商品はサーモサイクル運転による圧縮機停止
中の熱リークの影響を受けることなく、除霜開始前の段
階で連続強制冷却されて充分低温まで冷却されることに
なる。したがって除霜に伴う品温上昇の絶対温度を従来
方式に比べて低く抑えることができ、これによって保冷
運転、除霜を含む全期間を通じて庫内貯蔵商品を適正品
温に維持しその品質確保を図ることができる。As described above, according to the present invention, in the process of transitioning from cold preservation operation to defrosting, the operation mode of the compressor is switched from thermostat-controlled thermocycle operation to forced continuous operation for a predetermined period of time before the start of defrosting, and the operation is controlled. By doing so, the products stored in the refrigerator are not affected by heat leakage while the compressor is stopped due to thermocycle operation, and are continuously forcedly cooled to a sufficiently low temperature before the start of defrosting. Therefore, the absolute temperature increase due to defrosting can be kept lower than that of conventional methods, and this allows the products stored in the warehouse to be kept at the appropriate temperature throughout the entire period, including cold storage operation and defrosting, and to ensure quality. can be achieved.
第1図、第3図はそれぞれこの発明の実施例および従来
における冷凍機の運転制御回路図、第2図および第4図
はそれぞれ第1図、第3図の回路による冷凍機の制御動
作のタイムチャートである。
図において、
l;圧縮機、2:除霜ヒータ、3:サーモスタット、4
:除霜タイマ。
第3図
第4図FIG. 1 and FIG. 3 are respectively diagrams of the operation control circuit of a refrigerator according to an embodiment of the present invention and a conventional one, and FIGS. 2 and 4 are diagrams of the control operation of the refrigerator using the circuits of FIG. This is a time chart. In the figure, l: compressor, 2: defrost heater, 3: thermostat, 4
: Defrost timer. Figure 3 Figure 4
Claims (1)
オン、オフ制御して庫内収納の貯蔵物をほぼ一定温度に
維持するサーモサイクル運転を行い、かつ所定の周期で
保冷運転から除霜に切換えてこの除霜期間に冷却器を強
制加熱して除霜を行う冷凍機の運転制御方式において、
保冷運転から除霜に移行する過程で除霜開始前に所定時
間だけ圧縮機の運転モードを前記したサーモサイクル運
転から強制連続運転に切換えて運転制御することを特徴
とする冷凍機の運転制御方式。 2)特許請求の範囲第1項記載の運転制御方式において
、サーモサイクル運転、除霜、強制連続運転の運転モー
ドの切換えをタイマ制御によって行うことを特徴とする
冷凍機の運転制御方式。[Scope of Claims] 1) During cold storage operation, a thermocycle operation is performed in which the compressor is controlled on and off by thermostat control to maintain the stored items at a substantially constant temperature, and the cold storage operation is stopped at a predetermined cycle. In a refrigerator operation control method that switches to defrost mode and forcibly heats the cooler to defrost during this defrost period,
A refrigerating machine operation control method characterized in that in the process of transitioning from cold preservation operation to defrosting, the operation mode of the compressor is switched from the above-mentioned thermocycle operation to forced continuous operation for a predetermined period of time before the start of defrosting. . 2) An operation control method for a refrigerator according to claim 1, characterized in that the operation modes of thermocycle operation, defrosting, and forced continuous operation are switched by timer control.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5700885A JPS61213568A (en) | 1985-03-20 | 1985-03-20 | Method of controlling operation of refrigerator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5700885A JPS61213568A (en) | 1985-03-20 | 1985-03-20 | Method of controlling operation of refrigerator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61213568A true JPS61213568A (en) | 1986-09-22 |
Family
ID=13043423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5700885A Pending JPS61213568A (en) | 1985-03-20 | 1985-03-20 | Method of controlling operation of refrigerator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61213568A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63231182A (en) * | 1987-03-17 | 1988-09-27 | 中野冷機株式会社 | Refrigerator |
JPH0160178U (en) * | 1987-10-13 | 1989-04-17 | ||
JP2012163301A (en) * | 2011-02-09 | 2012-08-30 | Nakano Refrigerators Co Ltd | Refrigerator control device and method of controlling refrigerator |
JP2012163300A (en) * | 2011-02-09 | 2012-08-30 | Nakano Refrigerators Co Ltd | Device and method of controlling refrigerating machine |
-
1985
- 1985-03-20 JP JP5700885A patent/JPS61213568A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63231182A (en) * | 1987-03-17 | 1988-09-27 | 中野冷機株式会社 | Refrigerator |
JPH0160178U (en) * | 1987-10-13 | 1989-04-17 | ||
JP2012163301A (en) * | 2011-02-09 | 2012-08-30 | Nakano Refrigerators Co Ltd | Refrigerator control device and method of controlling refrigerator |
JP2012163300A (en) * | 2011-02-09 | 2012-08-30 | Nakano Refrigerators Co Ltd | Device and method of controlling refrigerating machine |
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