JPS61191849A - Method of operating showcase - Google Patents
Method of operating showcaseInfo
- Publication number
- JPS61191849A JPS61191849A JP2446386A JP2446386A JPS61191849A JP S61191849 A JPS61191849 A JP S61191849A JP 2446386 A JP2446386 A JP 2446386A JP 2446386 A JP2446386 A JP 2446386A JP S61191849 A JPS61191849 A JP S61191849A
- Authority
- JP
- Japan
- Prior art keywords
- evaporator
- showcase
- frost
- defrosting
- temperature
- 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)
- Freezers Or Refrigerated Showcases (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】
この発明はケース本体内に蒸発器を設置し、冷凍装置の
運転により蒸発器と熱交換して得た冷気を循環通風して
庫内の商品を保冷する冷凍ないし冷蔵仕様のショーケー
スの運転方法に関する。Detailed Description of the Invention This invention is a freezing or refrigeration system that installs an evaporator inside the case body and circulates and ventilates the cold air obtained by exchanging heat with the evaporator by operating a refrigeration device to keep the products in the refrigerator cold. Concerning how to operate the showcase of specifications.
スーパーマーケットなどの店舗内に据付けて使用される
上記ショーケースは、商品の品質維持の面からショーケ
ースの稼動全期間を通じて庫内商品の品質を所定の冷蔵
温度に安定維持できることが望まれる。In order to maintain the quality of the products, the showcases installed and used in stores such as supermarkets are desired to be able to stably maintain the quality of the products inside at a predetermined refrigeration temperature throughout the entire operating period of the showcase.
運転経過に伴なって蒸発器に付着蓄積する霜の量、およ
び蓄積した霜を融解除去するのに要する除霜時間が大き
な影響を及ぼす。この点について詳しく述べるに、まず
冷凍装置の運転経過に伴なって蒸発器には霜が生じ、こ
の霜が蒸発器の表面を覆って蓄積していくことは周知の
通りである。しかして蒸発器に霜が付1蓄積すると、蒸
発器の熱交換効率を低下させるのみならず、蒸発器のフ
ィン間の通風路断面を狭めることになるので十分な冷気
循環風量が得られなくなり、これが原因で保冷性能が低
下して品温上昇を招く。しかも前記の着霜量は冷凍装置
の連続運転時間にほぼ比例し、かつケース周囲条件が多
湿であるほど多くなる傾向にあり、またショーケースの
保冷性能は着霜量が成る限界を超えると蒸発器が霜詰ま
りしてしまって極端に悪化する。一方、前記のように蒸
発器に蓄積した霜を除去するには、着霜量が限界を超え
る以前に一旦冷凍装置を停止しこの状態でヒータ除霜、
ホットガス除霜あるいは空気除霜など周知の強制除霜方
式による除霜が行なわれているが、除霜期間中は冷凍装
置が停止して保冷が行なわれなに′)のみならず、除霜
中には外部から積極的に除霜熱が加えられるので多少な
りとも品5あの上昇を避けることができない。しかも着
霜量が多ければ多いほど除霜熱量、除霜に要する時間も
多く必要とするので、ますます品温上昇が大となる。The amount of frost that accumulates on the evaporator over the course of operation and the defrosting time required to melt and remove the accumulated frost have a major influence. To discuss this point in detail, first, it is well known that frost forms on the evaporator as the refrigeration system operates, and that this frost covers the surface of the evaporator and accumulates. However, when frost accumulates on the evaporator, it not only reduces the heat exchange efficiency of the evaporator, but also narrows the cross section of the ventilation passage between the fins of the evaporator, making it impossible to obtain a sufficient amount of cold air circulation. This causes the cold storage performance to deteriorate and the product temperature to rise. Moreover, the amount of frost formed above is approximately proportional to the continuous operation time of the refrigeration equipment, and tends to increase as the surrounding conditions of the case become more humid.Furthermore, the cold retention performance of the showcase is affected by evaporation when the amount of frost exceeds the limit. The container becomes clogged with frost and becomes extremely worse. On the other hand, in order to remove the frost accumulated in the evaporator as described above, stop the refrigeration equipment before the amount of frost buildup exceeds the limit, and then defrost the heater in this state.
Defrosting is performed using well-known forced defrosting methods such as hot gas defrosting or air defrosting, but during the defrosting period, the refrigeration equipment is stopped and cold storage is performed. Since defrosting heat is actively applied from the outside, some increase in quality cannot be avoided. Moreover, the greater the amount of frost formation, the greater the amount of heat required for defrosting and the greater the time required for defrosting, which increases the temperature of the product.
ところで現在市場に多く出回わっているショーケースは
、保冷運転の経過に伴なって蓄積した霜を取除くために
、1日4〜6回、つまり4時間ないし6時間を運転サイ
クルとして保冷運転の後に一旦冷凍装置を停止し、この
停止期間中に30分程度の時間をかけてヒータ除霜、ホ
ットガス除霜方式など外部から除霜熱を与えて強制除霜
を行ない、蒸発器に蓄積している霜を一掃除去すること
が行なわれている。By the way, many showcases currently on the market run cold storage operations 4 to 6 times a day, that is, for 4 to 6 hours, in order to remove the frost that has accumulated over the course of cold storage operation. After this, the refrigeration equipment is temporarily stopped, and during this stop period, defrosting heat is applied externally using heater defrosting, hot gas defrosting, etc. to perform forced defrosting, which takes about 30 minutes to accumulate in the evaporator. The frost that is present is being wiped out.
本発明は上述の点に鑑みてなされたもので、以下図面に
よりその実施例を説明する。The present invention has been made in view of the above points, and embodiments thereof will be described below with reference to the drawings.
第1図(1)は前面に商品収納及び取出用の開口(3)
を形成した断熱壁(2)にて本体を構成してなる冷凍又
は冷蔵ショーケースで、前記断熱壁内に蒸発器(4)及
び送風機(5)を設置する第1通路(6)と、送風機(
7)を設置する第2通路<8)と、複数枚の棚(9)及
び複数本の螢光灯等の照明(10)を備える庫内(11
)と、前記開口の上下両端に相対向する前記両通路の吹
田及び吸込両口(12)(13)(14)(15)とを
形成してなり、第1及び第2両通路(6>(8)を矢印
の如く両送風機(5)(7)により夫々循環される冷気
流及び保護気流でもって開口(3〉に温度の異なる二層
のエアーカーテン(At)(A2)を形成して庫内(1
1)を冷却するものである。破線にて囲まれる(16)
は冷凍装置で、冷媒圧縮機(17)−凝縮器(18)−
液電磁弁(19)7一温度式膨張弁(2″0)−酸サイ
クルを構成する。Figure 1 (1) shows the opening (3) for storing and taking out products on the front.
A freezing or refrigerating showcase whose main body is composed of an insulating wall (2) formed with (
7), and an interior (11) equipped with multiple shelves (9) and multiple lights (10) such as fluorescent lights.
), and Suita and suction ports (12), (13), (14), and (15) of both the passages facing each other are formed at both upper and lower ends of the opening, and the first and second passages (6> As shown by the arrows in (8), a two-layer air curtain (At) (A2) with different temperatures is formed at the opening (3>) by the cold air flow and protective air flow circulated by both blowers (5) and (7), respectively. Inside the warehouse (1
1). Surrounded by a broken line (16)
is a refrigeration system, which includes a refrigerant compressor (17) - a condenser (18) -
Liquid electromagnetic valve (19) 7 - temperature type expansion valve (2''0) - constitutes an acid cycle.
(21)は庫内(11)の温度を制御する制御装置で、
該装置には前記ショーケース内の冷気温度を常時検出す
る温度センサー(22)と、蒸発器(4)への液冷媒の
供給を制御する液電磁弁(19)とが接続されている。(21) is a control device that controls the temperature inside the refrigerator (11);
A temperature sensor (22) that constantly detects the temperature of cold air in the showcase and a liquid electromagnetic valve (19) that controls the supply of liquid refrigerant to the evaporator (4) are connected to the device.
この装置は第2図に示す如く電源(23)と、比較及び
タイマ機能等を内蔵し各信号を比較する処理部(24)
と制御すべき各温度設定値を格納し庫内(11)の温度
に応じた成る時間幅の信号を出す□設定部(25)と、
照明(10)の点灯又は消灯に伴ない店舗の営業又は非
営業時の信号を出す昼夜切替部(26)と前記温度セン
サー<zz>i、前記処理部からの信号によりオン・オ
フして液電磁弁(19)の開閉動作を制御する出力部(
27)とにより構成されている。As shown in Figure 2, this device includes a power supply (23) and a processing section (24) that has built-in comparison and timer functions and compares each signal.
and a setting unit (25) that stores each temperature setting value to be controlled and outputs a signal with a time width corresponding to the temperature inside the refrigerator (11);
A day/night switching section (26) that signals when the store is open or closed when the lights (10) are turned on or off, and the temperature sensor <zz>i, which turns on and off according to the signal from the processing section Output section (
27).
次にかよる制御装置(21)によるショーケース(1)
の各温度側−を第3図乃至第5図により説明する。尚各
図において(L、)は塩度センサー(22)にて検出ル
た循環冷気の温度曲線、(L、)は液電磁弁(19)の
開閉を制御する出力部(27)の信号波形、(L、)は
昼夜切替部(26)の信号波形、(TS’)は営業時に
おける゛示限設定値、(’I’D)は営業時における上
限設定値、(TN)は非営業時における下限設定値、(
ID’)は非営業時における下限設定値、(6丁)は照
明(10)の消灯による夜間自動設定変更の温度幅を示
す。Showcase (1) with the next control device (21)
Each temperature side will be explained with reference to FIGS. 3 to 5. In each figure, (L,) is the temperature curve of the circulating cold air detected by the salinity sensor (22), and (L,) is the signal waveform of the output section (27) that controls the opening and closing of the liquid solenoid valve (19). , (L,) is the signal waveform of the day/night switching unit (26), (TS') is the limit setting value during business hours, ('I'D) is the upper limit setting value during business hours, (TN) is the non-business time limit setting value. Lower limit set value at time, (
ID') indicates the lower limit set value during non-business hours, and (6th) indicates the temperature range of automatic setting change at night when the light (10) is turned off.
第3図はオン・オフ及びナイトセットバック両制御の特
性を示し、昼夜切替信号(L、)がOFFのとき、即ち
照明(10)が点灯している店舗の営業時間に−は下限
鰻定値(TS)で出力信号(L、)をOF針、上限設定
値(1”D)で出力信号(L、)をONL、てオン・オ
フ制御を繰り返して行ない、昼夜切替信号(Ls)のO
Nに伴妊いナイトセットバックに移り、照明(10)が
消灯している店舗の非営業時間には下限i定値(TN)
で出力信号(L、)をOFF、上限設定値(TD’)で
出力信号(L、)をONしてオン・オフ制御を行なう。Figure 3 shows the characteristics of both on/off and night setback control. (TS) is used to turn the output signal (L,) into the OF hand, and when the upper limit setting value (1"D) is used to turn the output signal (L,) into ONL, repeated on/off control is performed.
Due to N, there will be a night setback, and the lower limit i constant value (TN) will be set during non-business hours of the store when the lights (10) are turned off.
The output signal (L,) is turned off at the upper limit setting value (TD'), and the output signal (L,) is turned on at the upper limit setting value (TD') to perform on/off control.
第4図はオシ・オフ、ナイトセットバック及びデユーテ
ィサイクルの各制御の特性を示し、営業時間には処理部
(24)のタイマにより周期(τ)で(τ、)の聞出力
信号(Ll)を0FFL、てオン・オフ制御の間、強制
的に液電磁弁(19)を閉じ蒸発器(4)〜の液冷媒の
供給を間欠的に停止する昼間挑デユーティサイクル制御
を行ない、又非営業時間には周期(τ)で(TN)((
τ、)〉(τ、))の間出力信号(L、)をOFFして
オン・オフ、ナイトセットパック及び強制的に液電磁弁
(19)を閉じ蒸発器(4)への液冷媒を間欠的に停止
する夜間のデユーティサイクルの各制御を行なう、尚こ
のデユーティサイクルの間、送風機(5)(7)は運転
を継続しており、この間、蒸発器(4〉の霜は循環冷気
の蒸発作用により解かされることになる。Figure 4 shows the characteristics of the oscillator-off, night setback, and duty cycle controls. ) during on/off control, performs daytime duty cycle control that forcibly closes the liquid solenoid valve (19) and intermittently stops the supply of liquid refrigerant to the evaporator (4). During non-business hours, (TN)((
Turn off the output signal (L,) and turn it on and off between τ, )> (τ, )), and forcefully close the night set pack and liquid solenoid valve (19) to supply liquid refrigerant to the evaporator (4). Each control is performed during the night duty cycle, which stops intermittently.During this duty cycle, the blowers (5) and (7) continue to operate, and during this time, the frost in the evaporator (4>) is circulated. It will be dissolved by the evaporation effect of cold air.
第5図はデユーティサイクル制御におけるオーバーライ
ドの特性を示し、(?R)はデユーティサイクルの温度
幅、(LA>はオーバーライドの信号波形を示す、デユ
ーティサイクルによる冷却運転停止中にショーケース(
1)内の温度が鎖線の如く上昇し商品負荷に悪影響を及
ぼす場合がある。この場合には冷却運転停止時間(昼間
は(τ、)、夜間は(τ、))の間に温度が ((’1
’S) + (’1’R)又は(IN) + (TR)
)を超えると即時に出力信号(L、)がONとなり、強
制的に冷却運転に復帰させるオーバーライドを行なう。Figure 5 shows the characteristics of override in duty cycle control, where (?R) is the duty cycle temperature width, (LA> is the override signal waveform, and the showcase (?
1) The temperature inside may rise as shown by the chain line, which may adversely affect the product load. In this case, the temperature (('1
'S) + ('1'R) or (IN) + (TR)
), the output signal (L, ) is immediately turned ON, and an override is performed to forcibly return to cooling operation.
尚、次のデューイサイクルによる冷却運転停止は温度が
(TS)又は(TN)迄下がり(くτ)−(τ、)又は
(で)−(τm))の後に行なわれる。Incidentally, the cooling operation is stopped by the next Dewey cycle after the temperature has decreased to (TS) or (TN) ((τ)-(τ,) or (de)-(τm)).
従って、本発明によれば、冷却運転中、周期的に短時間
蒸発器旬への液冷媒の供給を間欠的に停止するため、冷
却運転の時間経過に伴なう蒸発器への着霜量の増加割合
が少なくなると共に、この間循環冷気の蒸発作用による
オフサイクル除霜によって霜を僅かに減らすことができ
、この結果、循環冷気の大幅な温度上昇をきたすことな
く除霜でき、しかも1日当りの除霜回数を少なくできる
ことに併わせ、蒸発器刈を高い熱交換率で運転して十分
な冷却性能を発揮させることができる。Therefore, according to the present invention, since the supply of liquid refrigerant to the evaporator is periodically stopped for a short time during the cooling operation, the amount of frost on the evaporator increases as the time elapses during the cooling operation. At the same time, during this period, the frost can be slightly reduced by off-cycle defrosting due to the evaporation effect of the circulating cold air, and as a result, the frost can be defrosted without causing a large temperature rise of the circulating cold air, and moreover, the frost can be reduced slightly per day. In addition to reducing the number of defrosting operations, the evaporator mower can be operated at a high heat exchange rate to provide sufficient cooling performance.
図面は本発明ショーケースの運転方法の実施例を示し、
第1図はショーケースの縦断面図、第2図は制御装置の
ブロック図、第3図乃至第5図は制御装置の動作を示す
特性図である。
(4)・・・蒸発器、 (5)・・・送風機、 (21
)・・・制御装置、 (22)・・・温度センサー、
(24)・・・処理部、(25)・・・設定部、 (2
6)・・・昼夜切替部、 (27)・・・出力部。
第2図
第3図The drawings show an embodiment of the method of operating the showcase of the present invention,
FIG. 1 is a longitudinal sectional view of the showcase, FIG. 2 is a block diagram of the control device, and FIGS. 3 to 5 are characteristic diagrams showing the operation of the control device. (4)...Evaporator, (5)...Blower, (21
)...control device, (22)...temperature sensor,
(24)...processing section, (25)...setting section, (2
6)... Day/night switching section, (27)... Output section. Figure 2 Figure 3
Claims (1)
して庫内を所定の温度に冷却するショーケースにおいて
、冷却運転中、周期的に短時間前記蒸発器への液冷媒の
供給を間欠的に停止させると共に、この間前記送風機の
運転を継続させて蒸発器のオフサイクル除霜を行なわせ
るショーケースの運転方法。1. In a showcase that cools the inside of a refrigerator to a predetermined temperature by forcibly circulating cool air that has been heat exchanged in an evaporator using a blower, during cooling operation, the supply of liquid refrigerant to the evaporator is periodically interrupted for a short period of time. A method of operating a showcase, in which the blower is stopped temporarily, and the blower continues to operate during this period to perform off-cycle defrosting of the evaporator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2446386A JPS61191849A (en) | 1986-02-06 | 1986-02-06 | Method of operating showcase |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2446386A JPS61191849A (en) | 1986-02-06 | 1986-02-06 | Method of operating showcase |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61191849A true JPS61191849A (en) | 1986-08-26 |
Family
ID=12138861
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2446386A Pending JPS61191849A (en) | 1986-02-06 | 1986-02-06 | Method of operating showcase |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61191849A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6382178U (en) * | 1986-11-18 | 1988-05-30 | ||
JPS6422616A (en) * | 1987-07-16 | 1989-01-25 | Sanden Corp | Temperature controller for car cooler |
US6357576B1 (en) | 1999-04-14 | 2002-03-19 | Enomoto Industry Co., Ltd | Chip conveyors and apparatus for separating and collecting chips |
US6695122B2 (en) | 2000-07-19 | 2004-02-24 | Enomoto Industry Company, Ltd. | Chip conveyer and chip-separation/recovery apparatus |
JP2020094710A (en) * | 2018-12-10 | 2020-06-18 | アクア株式会社 | refrigerator |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5220693A (en) * | 1975-08-11 | 1977-02-16 | Yasuo Tsutsui | Low thrombotic follow fiber type artificial liver |
JPS5237221A (en) * | 1975-09-17 | 1977-03-23 | Caterpillar Tractor Co | Filling and relief valve means |
JPS5397653A (en) * | 1977-02-05 | 1978-08-26 | Fuji Electric Co Ltd | Defrosting method of cold circulating type open show case |
-
1986
- 1986-02-06 JP JP2446386A patent/JPS61191849A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5220693A (en) * | 1975-08-11 | 1977-02-16 | Yasuo Tsutsui | Low thrombotic follow fiber type artificial liver |
JPS5237221A (en) * | 1975-09-17 | 1977-03-23 | Caterpillar Tractor Co | Filling and relief valve means |
JPS5397653A (en) * | 1977-02-05 | 1978-08-26 | Fuji Electric Co Ltd | Defrosting method of cold circulating type open show case |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6382178U (en) * | 1986-11-18 | 1988-05-30 | ||
JPS6422616A (en) * | 1987-07-16 | 1989-01-25 | Sanden Corp | Temperature controller for car cooler |
JPH0367884B2 (en) * | 1987-07-16 | 1991-10-24 | Sanden Corp | |
US6357576B1 (en) | 1999-04-14 | 2002-03-19 | Enomoto Industry Co., Ltd | Chip conveyors and apparatus for separating and collecting chips |
US6695122B2 (en) | 2000-07-19 | 2004-02-24 | Enomoto Industry Company, Ltd. | Chip conveyer and chip-separation/recovery apparatus |
JP2020094710A (en) * | 2018-12-10 | 2020-06-18 | アクア株式会社 | refrigerator |
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