JP4453466B2 - Chiller system - Google Patents

Chiller system Download PDF

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JP4453466B2
JP4453466B2 JP2004202977A JP2004202977A JP4453466B2 JP 4453466 B2 JP4453466 B2 JP 4453466B2 JP 2004202977 A JP2004202977 A JP 2004202977A JP 2004202977 A JP2004202977 A JP 2004202977A JP 4453466 B2 JP4453466 B2 JP 4453466B2
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refrigerated showcase
series
temperature
refrigerator
cooler
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JP2006023045A (en
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晴彦 須藤
一博 坂井
喜四郎 草野
基之 植田
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Fuji Electric Retail Systems Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General 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
    • F25B2400/22—Refrigeration systems for supermarkets

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  • Defrosting Systems (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Description

本発明は、スーパーマーケット、コンビニエンスストアなどに設置した冷蔵ショーケースなどの冷却器を管理する冷却器システムに関し、複数の冷却器に冷媒を供給する冷凍機を備えた冷却器システムに関するものである。   The present invention relates to a cooler system that manages a cooler such as a refrigerated showcase installed in a supermarket, a convenience store, and the like, and relates to a cooler system that includes a refrigerator that supplies refrigerant to a plurality of coolers.

冷凍機から複数の冷蔵ショーケースなどの冷却器に冷媒を供給する冷却器システムが一般に知られている。ここで用いる冷凍機が必要とする冷凍能力は、各冷却器が必要とする冷凍能力に安全率（余裕率）３０パーセントを加えたものである。この安全率３０パーセントの内訳は、配管圧力損失１０パーセント、外気温度補正１０パーセント、プルダウン対応（除霜後の負荷上昇分）１０パーセントである。たとえば、図５に示すＤ，Ｅ，Ｆの三群に分類した冷蔵ショーケース群Ｄ，Ｅ，Ｆと、これらの冷蔵ショーケース群Ｄ，Ｅ，Ｆに冷媒を供給する冷凍機Ｇと、制御装置Ｈとからなる冷蔵ショーケースシステムにおいて、各冷蔵ショーケース群Ｄ，Ｅ，Ｆが通常運転にそれぞれ１７馬力、２０馬力、２１馬力の冷凍能力を必要とすると、冷凍機Ｇは７５．４馬力（（１７馬力＋２０馬力＋２１馬力）×１．３）の冷凍能力を必要とする。この算出結果に基づいて、冷凍機を選定すると、冷凍機の冷凍能力は５馬力刻みで市販されているために、８０馬力の冷凍能力を有する冷凍機を選定しなければならなかった。しかも、全ての冷蔵ショーケース群Ｄ，Ｅ，Ｆを同時に除霜した場合には、図６に示すように、全ての冷蔵ショーケース群Ｄ，Ｅ，Ｆで負荷が上昇し、冷凍機Ｇで必要となる負荷はプルダウン対応に要する安全率（１０パーセント）では十分でなく、さらに大きな冷凍能力を有する冷凍機を選定する必要があった。   A cooler system that supplies a refrigerant from a refrigerator to a plurality of coolers such as a refrigerated showcase is generally known. The refrigeration capacity required for the refrigerator used here is the refrigeration capacity required for each cooler plus a safety factor (margin ratio) of 30%. The breakdown of the safety factor of 30% is 10% of pipe pressure loss, 10% of outside air temperature correction, and 10% for pull-down (load increase after defrosting). For example, the refrigerated showcase groups D, E, and F classified into three groups D, E, and F shown in FIG. 5, the refrigerator G that supplies refrigerant to these refrigerated showcase groups D, E, and F, and the control In the refrigerated showcase system comprising the apparatus H, if each of the refrigerated showcase groups D, E, and F requires a refrigeration capacity of 17 hp, 20 hp, and 21 hp for normal operation, the refrigerator G is 75.4 hp Refrigerating capacity of ((17 horsepower + 20 horsepower + 21 horsepower) × 1.3) is required. When a refrigerator is selected based on this calculation result, the refrigerator having a freezing capacity of 80 horsepower has to be selected because the freezing capacity of the refrigerator is commercially available in increments of 5 horsepower. In addition, when all the refrigerated showcase groups D, E, and F are defrosted at the same time, the load increases in all the refrigerated showcase groups D, E, and F as shown in FIG. The required load is not sufficient for the safety factor (10%) required for pull-down, and it was necessary to select a refrigerator having a larger refrigeration capacity.

そこで、系統ごとに分類した冷蔵ショーケース群Ｄ，Ｅ，Ｆごとに霜取りタイマーを備える一方、冷蔵ショーケースをブロック化してブロックごとに開閉可能な電磁弁Ｉを備え、動作時間をずらした各霜取りタイマーにより、ブロックごとに電磁弁Ｉを開閉し、冷凍機Ｇの運転を継続したままブロックごとに冷蔵ショーケース群Ｄ，Ｅ，Ｆの除霜を行っていた。このため、冷凍機Ｇの負荷変動が小さくなって安定し、冷蔵ショーケースの庫内温度も安定した。この結果、冷凍機の消費電力量が減少し、冷蔵ショーケースの除霜後の温度回復も良好となるので、温度制御性も向上した（特許文献１参照）。   Therefore, each refrigerated showcase group D, E, and F classified for each system is equipped with a defrost timer, while each refrigeration showcase is provided with a solenoid valve I that can be opened and closed for each block, and each operation time is shifted. The solenoid valve I was opened and closed for each block by the timer, and the refrigerated showcase groups D, E, and F were defrosted for each block while the operation of the refrigerator G was continued. For this reason, the load fluctuation of the refrigerator G became small and stable, and the inside temperature of the refrigerated showcase was also stable. As a result, the power consumption of the refrigerator is reduced, and the temperature recovery after defrosting of the refrigerated showcase is improved, so that the temperature controllability is also improved (see Patent Document 1).

特開平１１−８３２１６号公報JP-A-11-83216

しかしながら、上記の冷蔵ショーケースシステムでは、所定時間ごとにブロック化した冷蔵ショーケースの除霜を行うために、必ずしも除霜を必要としないブロックの冷蔵ショーケースも所定時間が経過すると除霜されることになる。このため、冷凍機Ｇを効率よく運転することができなかった。   However, in the above-described refrigerated showcase system, in order to defrost a refrigerated showcase that is blocked every predetermined time, a refrigerated showcase of a block that does not necessarily require defrosting is also defrosted when the predetermined time elapses. It will be. For this reason, the refrigerator G could not be operated efficiently.

本発明は、上記実情に鑑みて、冷凍機を効率よく運転することができる冷却器システムを提供することを目的とする。   An object of this invention is to provide the cooler system which can operate a refrigerator efficiently in view of the said situation.

上記の目的を達成するために、本発明の請求項１に係る冷却器システムは、一の冷凍機から複数の冷却器に冷媒を供給する冷却器システムにおいて、前記冷却器が冷媒の流入量を制御するバルブと、運転情報を取得する温度調節センサとをそれぞれ備えるとともに系列ごとに分類され、各温度調節センサから取得した運転情報に基づいて各バルブが冷凍機からの冷媒流入量を制御して各冷却器を所定の条件で運転する一方、温度調節センサから取得した運転情報に基づいて除霜する冷却器を特定し、特定した冷却器が含まれる系列の冷却器全てのバルブを閉塞して同一系列の全ての冷却器を除霜することを特徴とする。 In order to achieve the above object, a cooler system according to claim 1 of the present invention is a cooler system that supplies refrigerant from a single refrigerator to a plurality of coolers, wherein the cooler reduces the inflow amount of refrigerant. a valve for controlling, are classified and a temperature regulation sensor for acquiring operation information on Rutotomoni each series with each respective valve controls the refrigerant flow rate from the refrigerator on the basis of the obtained operation information from each of the temperature regulating sensor While operating each cooler under specified conditions, identify the cooler to be defrosted based on the operation information obtained from the temperature control sensor, and close all the valves of the series of coolers that include the identified cooler. All the coolers in the same series are defrosted.

また、本発明の請求項２に係る冷却器システムは、上記請求項１において、収納する商品の必要冷却温度帯域が重複又は近接する冷却器を同一系列に分類したことを特徴とする。 A cooler system according to a second aspect of the present invention is characterized in that, in the first aspect , the coolers in which the required cooling temperature bands of the goods to be stored overlap or are close to each other are classified into the same series.

また、本発明の請求項３に係る冷却器システムは、上記請求項１において、設置場所が近接する冷却器を同一系列に分類したことを特徴とする。 Furthermore, chiller system according to claim 3 of the present invention, in the claim 1, characterized in that the classification of cooler installation location close to the same sequence.

本発明に係る冷却器システムは、冷却器が冷媒の流入量を制御するバルブと、運転情報を取得する温度調節センサとをそれぞれ備えるとともに系列ごとに分類され、各温度調節センサから取得した運転情報に基づいて各バルブが冷凍機からの冷媒流入量を制御して各冷却器を所定の条件で運転する一方、温度調節センサから取得した運転情報に基づいて除霜する冷却器を特定し、特定した冷却器が含まれる系列の冷却器全てのバルブを閉塞して同一系列の全ての冷却器を除霜するので、冷凍機を効率よく運転することができるという効果を奏する。 Chiller system according to the present invention, operation cooler and a valve for controlling the inflow of the refrigerant, are classified and a temperature regulation sensor for acquiring operation information on Rutotomoni each series comprising each obtained from the respective temperature control sensor While each valve controls the refrigerant inflow amount from the refrigerator based on the information and operates each cooler under a predetermined condition, the cooler to be defrosted is specified based on the operation information acquired from the temperature control sensor, Since all the coolers in the series including the specified cooler are closed to defrost all the coolers in the same series, there is an effect that the refrigerator can be operated efficiently.

以下に添付図面を参照して、本発明に係る冷却器システムの好適な実施例を詳細に説明する。なお、この実施例によりこの発明が限定されるものではない。   Hereinafter, preferred embodiments of a cooler system according to the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.

冷却器システムは、代表的なものとして、コンビニエンスストア、スーパーマーケット等の店舗に設置した冷蔵ショーケースシステムが知られている。ここでは、冷蔵ショーケースシステムを例に冷却器システムを説明する。   As a typical cooler system, a refrigerated showcase system installed in a store such as a convenience store or a supermarket is known. Here, the cooler system will be described by taking a refrigerated showcase system as an example.

本実施例に係る冷蔵ショーケースシステム１は、冷凍機２と、複数の冷蔵ショーケース３と、制御装置４とを備えている。冷凍機２は、店舗の外に設置してあり、凝縮器（図示せず）、圧縮機（図示せず）、受液器（図示せず）が内蔵してある。   A refrigerated showcase system 1 according to the present embodiment includes a refrigerator 2, a plurality of refrigerated showcases 3, and a control device 4. The refrigerator 2 is installed outside the store, and includes a condenser (not shown), a compressor (not shown), and a liquid receiver (not shown).

一方、複数の冷蔵ショーケース３は、店舗の中に設置してある。通常、冷蔵ショーケース３は、店舗の壁際に並べて設置してあり、店舗利用客が自由に商品を取り出せるようにオープン型の冷蔵ショーケースが採用されている。たとえば、図１に示す店舗では、コの字状となるように壁際に並べて設置してある。そして、これらの冷蔵ショーケース３は、収納される商品の必要冷却温度帯域が重複又は近接する系列ごとにＡ，Ｂ，Ｃに分類してある。したがって、収納される商品の必要冷却温度帯域が近接する冷蔵ショーケース３は同一系列に分類される。   On the other hand, a plurality of refrigerated showcases 3 are installed in the store. Usually, the refrigerated showcase 3 is installed side by side on the wall of the store, and an open-type refrigerated showcase is adopted so that the customers of the store can freely take out the products. For example, in the store shown in FIG. 1, they are installed side by side on the wall so as to be U-shaped. These refrigerated showcases 3 are classified into A, B, and C for each series in which the required cooling temperature bands of the stored products overlap or are close to each other. Therefore, the refrigerated showcases 3 in which the necessary cooling temperature bands of the stored products are close are classified into the same series.

冷蔵ショーケース３は、それぞれ、コントローラ（図示せず）、温度調節センサ（図示せず）、電磁弁３１、蒸発器（図示せず）を備えている。コントローラは冷蔵ショーケース３を制御するものであり、制御装置４と通信可能に接続してある。また、コントローラは、冷蔵ショーケース３の温度調節センサおよび電磁弁３１とも接続してある。温度調節センサは、冷蔵ショーケース３の庫内温度を計測するものであり、計測した庫内温度はコントローラにおいて冷蔵ショーケース３の制御指標とする一方、制御装置４に送信される。したがって、測定した庫内温度が設定温度（必要冷却温度帯域の上限温度）よりも高い場合には電磁弁３１を開放し、測定した庫内温度が設定温度（必要冷却温度帯域の下限温度）に達した場合には電磁弁３１を閉塞する。   The refrigerated showcase 3 includes a controller (not shown), a temperature control sensor (not shown), a solenoid valve 31, and an evaporator (not shown). The controller controls the refrigerated showcase 3 and is communicably connected to the control device 4. The controller is also connected to the temperature control sensor and the electromagnetic valve 31 of the refrigerated showcase 3. The temperature adjustment sensor measures the internal temperature of the refrigerated showcase 3, and the measured internal temperature is used as a control index of the refrigerated showcase 3 by the controller, and is transmitted to the control device 4. Therefore, when the measured internal temperature is higher than the set temperature (the upper limit temperature of the necessary cooling temperature band), the solenoid valve 31 is opened, and the measured internal temperature becomes the set temperature (the lower limit temperature of the required cooling temperature band). When reaching, the electromagnetic valve 31 is closed.

電磁弁３１は、一方が冷凍機２に接続してあり、他方が蒸発器に接続してある。電磁弁３１は、コントローラにより開閉制御され、通電時には電磁弁３１が開放して冷凍機２から蒸発器に冷媒が供給される一方、無通電時には電磁弁３１が閉塞して冷凍機２から蒸発器への冷媒供給が遮断される。したがって、電磁弁３１の開放時には、冷凍機２と蒸発器とにより冷凍サイクルが構成され、冷凍機２から液化した冷媒が蒸発器に供給され、蒸発器で気化した冷媒は冷凍機２に回収される。したがって、冷凍機２と蒸発器とを冷媒が循環し、冷蔵ショーケース３の庫内は冷却される。そして、冷蔵ショーケース３の蒸発器に流入する冷媒の量を調節する。たとえば、冷蔵ショーケース３の庫内温度を下げる場合には、電磁弁３１を開放して連続して冷媒を流入させ、庫内温度を上げる場合には、電磁弁３１を閉塞して冷媒の流入を遮断する。   One of the solenoid valves 31 is connected to the refrigerator 2 and the other is connected to the evaporator. The solenoid valve 31 is controlled to be opened and closed by a controller, and when energized, the solenoid valve 31 is opened and refrigerant is supplied from the refrigerator 2 to the evaporator, while when not energized, the solenoid valve 31 is closed and the refrigerator 2 sends the refrigerant to the evaporator. The refrigerant supply to is interrupted. Therefore, when the electromagnetic valve 31 is opened, the refrigeration cycle is constituted by the refrigerator 2 and the evaporator, the refrigerant liquefied from the refrigerator 2 is supplied to the evaporator, and the refrigerant vaporized by the evaporator is recovered by the refrigerator 2. The Accordingly, the refrigerant circulates between the refrigerator 2 and the evaporator, and the interior of the refrigerated showcase 3 is cooled. Then, the amount of refrigerant flowing into the evaporator of the refrigerated showcase 3 is adjusted. For example, when the internal temperature of the refrigerated showcase 3 is lowered, the solenoid valve 31 is opened to continuously flow in the refrigerant, and when the internal temperature is raised, the electromagnetic valve 31 is closed to enter the refrigerant. Shut off.

制御装置４は、冷蔵ショーケースシステム全体の制御を司るものであり、上述したように、各冷蔵ショーケース３のコントローラと通信可能に接続してある。制御装置４は、データベース（図示せず）を有しており、各冷蔵ショーケース３のコントローラから送信された庫内温度情報を受信し、この庫内温度情報と経時情報と関連づけて各冷蔵ショーケースの運転情報としてデータベースに蓄積可能である。   The control device 4 controls the entire refrigerated showcase system, and is connected to the controllers of the refrigerated showcases 3 as described above. The control device 4 has a database (not shown), receives the internal temperature information transmitted from the controller of each refrigerated showcase 3, and associates the internal temperature information with the time-lapse information to each refrigerated show. It can be stored in the database as case operation information.

制御装置４は、データベースに蓄積した運転情報から各冷蔵ショーケース３の除霜の要否を判断可能である。つまり、ある冷蔵ショーケース３の庫内温度が所定時間内に所定の温度まで下がらない場合には、その冷蔵ショーケース３は除霜する必要があると判断し、所定時間内に所定の温度まで下がる場合には、その冷蔵ショーケースは除霜する必要がないと判断する。   The control device 4 can determine whether or not it is necessary to defrost each refrigerated showcase 3 from the operation information stored in the database. That is, if the temperature in the refrigerator of a certain refrigerated showcase 3 does not drop to a predetermined temperature within a predetermined time, it is determined that the refrigerated showcase 3 needs to be defrosted, and the predetermined temperature is reached within a predetermined time. If it falls, it is determined that the refrigerated showcase does not need to be defrosted.

また、制御装置４は、各冷蔵ショーケース３に除霜指令を送信可能である。除霜指令は、除霜する必要があると判断した冷蔵ショーケース３が含まれる系列（たとえば、系列Ａ）の冷蔵ショーケース３の全てに送信され、制御装置４から送信された除霜指令を受信した冷蔵ショーケース３のコントローラは電磁弁３１を閉塞することにより、冷蔵ショーケース３の庫内温度を上昇させて冷蔵ショーケース３の除霜を行う。   Further, the control device 4 can transmit a defrosting command to each refrigerated showcase 3. The defrost command is transmitted to all of the refrigerated showcases 3 of the series (for example, series A) including the refrigerated showcase 3 determined to be defrosted, and the defrost command transmitted from the control device 4 is transmitted. The controller of the refrigerated showcase 3 that has been received closes the electromagnetic valve 31, thereby raising the temperature inside the refrigerated showcase 3 and defrosting the refrigerated showcase 3.

また、制御装置４は、各冷蔵ショーケース３にプルダウン（冷却）指令を送信可能である。プルダウン指令は、除霜した全ての冷蔵ショーケース３のコントローラに送信され、制御装置４から送信されたプルダウン指令を受信したコントローラは、庫内温度が設定温度（必要冷却温度の下限温度）に到達するまで、電磁弁３１を開放する。   Further, the control device 4 can transmit a pull-down (cooling) command to each refrigerated showcase 3. The pull-down command is transmitted to the controllers of all the defrosted refrigerated showcases 3, and the controller that has received the pull-down command transmitted from the control device 4 reaches the set temperature (the lower limit temperature of the required cooling temperature). Until then, the solenoid valve 31 is opened.

本発明の実施例に係る冷蔵ショーケースシステム１によれば、各冷蔵ショーケース３の庫内温度は各冷蔵ショーケース３のコントローラにより管理されている。つまり、冷蔵ショーケース３の庫内温度が設定温度（必要冷却温度帯域の上限温度）よりも高い場合には、冷蔵ショーケース３の温度が設定温度（必要冷却温度帯域の下限温度）に到達するまでコントローラが電磁弁３１を開放して冷蔵ショーケース３の蒸発器に冷媒が供給する。そして、冷蔵ショーケース３の庫内温度が設定温度（必要冷却温度帯域の下限温度）に到達した場合には、コントローラが電磁弁３１を閉塞して冷蔵ショーケース３の蒸発器への冷媒供給を停止する。その後、冷蔵ショーケース３の庫内温度が上昇して、設定温度（必要冷却温度帯域の上限温度）よりも高くなった場合には、コントローラが再び電磁弁３１を開放して冷蔵ショーケース３の蒸発気に冷媒を供給する。   According to the refrigerated showcase system 1 according to the embodiment of the present invention, the internal temperature of each refrigerated showcase 3 is managed by the controller of each refrigerated showcase 3. That is, when the internal temperature of the refrigerated showcase 3 is higher than the set temperature (the upper limit temperature of the necessary cooling temperature range), the temperature of the refrigerated showcase 3 reaches the set temperature (the lower limit temperature of the required cooling temperature range). Until the controller opens the electromagnetic valve 31, the refrigerant is supplied to the evaporator of the refrigerated showcase 3. When the internal temperature of the refrigerated showcase 3 reaches the set temperature (the lower limit temperature of the necessary cooling temperature band), the controller closes the electromagnetic valve 31 and supplies the refrigerant to the evaporator of the refrigerated showcase 3. Stop. Thereafter, when the internal temperature of the refrigerated showcase 3 rises and becomes higher than the set temperature (the upper limit temperature of the necessary cooling temperature band), the controller opens the electromagnetic valve 31 again and the refrigerated showcase 3 Supply refrigerant to the vapor.

一方、冷蔵ショーケース３のコントローラが取得した庫内温度情報は、制御装置４に逐次送信され、制御装置４はこの庫内温度情報と経時情報とを関連づけて各冷蔵ショーケース３の運転情報としてデータベースに蓄積する。制御装置４は、この運転情報を監視して、冷凍機２から冷蔵ショーケース３へ冷媒を供給しても、冷蔵ショーケース３が十分に冷却されない場合、つまり、冷凍機２から冷蔵ショーケース３に冷媒を供給したにも拘わらず、庫内温度が所定の時間内に所定の温度まで下がらない場合（冷却されない場合）には、蒸発器に付着した霜の量が多く、除霜する必要があると判断する。   On the other hand, the internal temperature information acquired by the controller of the refrigerated showcase 3 is sequentially transmitted to the control device 4, and the control device 4 associates the internal temperature information with the time-lapse information as operation information of each refrigerated showcase 3. Accumulate in the database. The control device 4 monitors the operation information and supplies the refrigerant from the refrigerator 2 to the refrigerated showcase 3, but the refrigerated showcase 3 is not sufficiently cooled, that is, the refrigerator 2 shows the refrigerated showcase 3. If the internal temperature does not drop to the predetermined temperature within a predetermined time (when it is not cooled) even though the refrigerant is supplied to the evaporator, the amount of frost adhering to the evaporator is large, and it is necessary to defrost. Judge that there is.

制御装置４が冷蔵ショーケース３について除霜する必要があると判断した場合には、除霜する必要があると特定した冷蔵ショーケース３が含まれる系列（たとえば、系列Ａ）の冷蔵ショーケース３のコントローラ全てに除霜指令を送信する。各冷蔵ショーケース３のコントローラは、除霜指令を受信すると、電磁弁３１を閉塞する。電磁弁３１を閉塞すると、冷蔵ショーケース３の蒸発器に冷媒が供給されないので、これらの冷蔵ショーケース３の庫内温度は上昇し、蒸発器に付着した霜は溶け落ちる。つまり、電磁弁３１を閉塞することにより、除霜指令を受信した冷蔵ショーケース３の除霜が可能となる。   When the control device 4 determines that the refrigerated showcase 3 needs to be defrosted, the refrigerated showcase 3 of a series (for example, series A) including the refrigerated showcase 3 that is identified as needing defrosting. A defrost command is transmitted to all the controllers. The controller of each refrigerated showcase 3 closes the solenoid valve 31 when receiving the defrost command. When the solenoid valve 31 is closed, the refrigerant is not supplied to the evaporator of the refrigerated showcase 3, so that the internal temperature of the refrigerated showcase 3 rises, and the frost attached to the evaporator melts away. That is, by closing the electromagnetic valve 31, the refrigerated showcase 3 that has received the defrost command can be defrosted.

冷蔵ショーケース３の除霜が完了すると、制御装置４は除霜した冷蔵ショーケース３のコントローラにプルダウン（冷却）指令を送信する。コントローラは、冷蔵ショーケース３の庫内温度が設定温度（必要冷却温度帯域の下限温度）に至るまで、電磁弁３１を開放する。すると、特定した冷蔵ショーケース３を含む系列（たとえば、系列Ａ）の冷蔵ショーケース３の蒸発器に冷媒が供給され、特定した冷蔵ショーケース３を含む系列（たとえば、系列Ａ）の冷蔵ショーケース３が全てプルダウン（冷却）される。   When the defrosting of the refrigerated showcase 3 is completed, the control device 4 transmits a pull-down (cooling) command to the controller of the defrosted refrigerated showcase 3. The controller opens the solenoid valve 31 until the internal temperature of the refrigerated showcase 3 reaches the set temperature (the lower limit temperature of the necessary cooling temperature band). Then, the refrigerant is supplied to the evaporator of the refrigerated showcase 3 of the series (for example, series A) including the specified refrigerated showcase 3, and the refrigerated showcase of the series (for example, series A) including the specified refrigerated showcase 3 is provided. All 3 are pulled down (cooled).

一の系列（たとえば、系列Ａ）の冷蔵ショーケース３の除霜が終了した時に、他の系列（たとえば、系列Ｂ）に含まれる冷蔵ショーケース３について除霜する必要があると制御装置４が判断した場合には、前記一の系列（系列Ａ）の冷蔵ショーケース３のコントローラにプルダウン（冷却）指令を送信する一方、前記他の系列（系列Ｂ）の冷蔵ショーケース３のコントローラに除霜指令を送信する。すると、前記一の系列（系列Ｂ）の冷蔵ショーケース３については電磁弁３１を開放し冷媒が流入する一方、前記他の系列（系列Ｂ）の冷蔵ショーケース３については電磁弁３１を閉塞し冷媒の流入を遮断することになる。   When the defrosting of the refrigerated showcase 3 of one series (for example, series A) is completed, the controller 4 determines that the refrigerated showcase 3 included in the other series (for example, series B) needs to be defrosted. If it is determined, a pull-down (cooling) command is transmitted to the controller of the refrigerated showcase 3 of the one series (series A), while defrosting is performed to the controller of the refrigerated showcase 3 of the other series (series B). Send a command. Then, for the refrigerated showcase 3 of the one series (series B), the solenoid valve 31 is opened and the refrigerant flows, while the solenoid valve 31 is closed for the refrigerated showcase 3 of the other series (series B). This will block the inflow of refrigerant.

本発明の実施例に係る冷蔵ショーケースシステム１は、冷蔵ショーケース３が冷媒の流入量を制御する電磁弁３１と、庫内温度情報を計測する温度調節センサとをそれぞれ備え、各温度調節センサが計測した庫内温度情報に基づいて各電磁弁３１が冷凍機２からの冷媒流入量を制御して各冷蔵ショーケース３を所定の条件で運転する一方、温度調節センサから取得した運転情報に基づいて除霜する冷蔵ショーケース３を特定し、特定した冷蔵ショーケース３の電磁弁３１を閉塞して当該冷蔵ショーケース３を除霜するので、冷凍機２を効率よく運転することができる。つまり、除霜する必要がない冷蔵ショーケース３については除霜しないので、冷蔵ショーケース３は除霜後のプルダウン（冷却）を必要としない。このため、図２に示すように、冷凍機２に必要以上の負荷を課すことがない。   A refrigerated showcase system 1 according to an embodiment of the present invention includes an electromagnetic valve 31 that controls the amount of refrigerant flowing in the refrigerated showcase 3 and a temperature adjustment sensor that measures internal temperature information, and each temperature adjustment sensor. Each solenoid valve 31 controls the refrigerant inflow amount from the refrigerator 2 based on the in-chamber temperature information measured by the vehicle to operate each refrigerated showcase 3 under a predetermined condition, while the operation information acquired from the temperature control sensor Since the refrigerated showcase 3 to be defrosted is specified and the electromagnetic valve 31 of the specified refrigerated showcase 3 is closed to defrost the refrigerated showcase 3, the refrigerator 2 can be operated efficiently. That is, since the refrigerated showcase 3 that does not need to be defrosted is not defrosted, the refrigerated showcase 3 does not require pull-down (cooling) after the defrosting. For this reason, as shown in FIG. 2, the load more than necessary is not imposed on the refrigerator 2.

また、系列ごとに冷蔵ショーケース３を分類し、特定した冷蔵ショーケース３が含まれる系列の冷蔵ショーケース３の全ての電磁弁を閉塞して同一系列の全ての冷蔵ショーケース３を除霜するので、系列の冷蔵ショーケース３を一括して除霜できる。したがって、冷蔵ショーケース３ごとに除霜する必要がない。   Further, the refrigerated showcase 3 is classified for each series, and all the solenoid valves of the refrigerated showcase 3 of the series including the specified refrigerated showcase 3 are closed to defrost all the refrigerated showcases 3 in the same series. Therefore, the refrigerated showcase 3 of a series can be defrosted collectively. Therefore, it is not necessary to defrost every refrigerated showcase 3.

また、収納される商品の必要冷却温度帯域が重複又は近接する冷蔵ショーケース３を同一系列Ａ，Ｂ，Ｃに分類したので、必要冷却温度帯域が近接する冷蔵ショーケース３の一方における冷媒の蒸発温度と他方における冷媒の蒸発温度とが近似して、冷凍機２の過剰出力を抑制できる。このため、冷蔵ショーケース３において商品を効率的に冷却することができる。   Further, since the refrigerated showcases 3 in which the necessary cooling temperature bands of the stored products overlap or are close to each other are classified into the same series A, B, C, the refrigerant evaporates in one of the refrigerated showcases 3 in which the necessary cooling temperature bands are close. The excessive output of the refrigerator 2 can be suppressed by approximating the temperature and the evaporation temperature of the refrigerant on the other side. For this reason, goods can be efficiently cooled in the refrigerated showcase 3.

一の系列（たとえば、系列Ａ）の冷蔵ショーケース３の除霜が終了した時に、他の系列（たとえば、系列Ｂ）に含まれる冷蔵ショーケース３について除霜する必要があると制御装置４が判断した場合には、前記一の系列（系列Ａ）の冷蔵ショーケース３のコントローラにプルダウン（冷却）指令を送信する一方、前記他の系列（系列Ｂ）の冷蔵ショーケース３のコントローラに除霜指令を送信し、前記一の系列（系列Ａ）の冷蔵ショーケース３についてはプルダウンする一方、前記他の系列（系列Ｂ）の冷蔵ショーケース３については除霜するので、図３に示すように、冷凍機２が必要とする負荷が小さくて済む。つまり、除霜する冷蔵ショーケース３が通常運転において必要であった冷凍能力をプルダウン（冷却）する冷蔵ショーケース３の冷凍能力として供給するので、冷凍機２が必要とする負荷を抑制できる。   When the defrosting of the refrigerated showcase 3 of one series (for example, series A) is completed, the controller 4 determines that the refrigerated showcase 3 included in the other series (for example, series B) needs to be defrosted. If it is determined, a pull-down (cooling) command is transmitted to the controller of the refrigerated showcase 3 of the one series (series A), while defrosting is performed to the controller of the refrigerated showcase 3 of the other series (series B). As shown in FIG. 3, the command is transmitted and the refrigerated showcase 3 of the one series (series A) is pulled down while the refrigerated showcase 3 of the other series (series B) is defrosted. The load required for the refrigerator 2 can be small. That is, since the refrigerated showcase 3 to be defrosted is supplied as the refrigeration capacity of the refrigerated showcase 3 that pulls down (cools) the refrigerating capacity that is necessary in normal operation, the load required by the refrigerator 2 can be suppressed.

以上説明したように、冷凍機２が必要とする負荷を抑制すれば、冷凍機２に対する負荷の集中を防止できる。特に冷蔵ショーケース３のプルダウンは通常３０分以内に行う必要があるので、冷凍機２に対する負荷を分散することにより、たとえば、時間帯によって電力料金が異なるような電力サービス契約をしている場合、最大消費電力量固定の電力サービス契約をしている場合であっても余計な超過電力料金を支払う必要がなくなる。   As described above, if the load required by the refrigerator 2 is suppressed, the concentration of the load on the refrigerator 2 can be prevented. In particular, since the pull-down of the refrigerated showcase 3 usually needs to be performed within 30 minutes, by distributing the load on the refrigerator 2, for example, when a power service contract is made such that the power rate varies depending on the time zone, Even if you have a power service contract with a fixed maximum power consumption, there is no need to pay extra power charges.

なお、上述した実施例に係る冷蔵ショーケースシステム１によれば、収納される商品の必要冷却温度帯域が重複又は近接する冷蔵ショーケース３を同一系列に分類するものとしたが、冷蔵ショーケース３を設置する設置場所が近接する冷蔵ショーケース３を同一系列に分類するものとしてもよい。   In the refrigerated showcase system 1 according to the above-described embodiment, the refrigerated showcases 3 in which the necessary cooling temperature bands of the stored products overlap or are close to each other are classified into the same series. It is good also as what classifies the refrigerated showcase 3 in which the installation place which installs near is classified into the same series.

設置場所が近接する冷蔵ショーケース３を同一系列に分類すれば、たとえば、隣接する冷蔵ショーケース３の一方で除霜し、他方で商品を冷却する事態を回避できる。したがって、図７に示すような除霜中の冷蔵ショーケース３の温度上昇によって、通常運転中の冷蔵ショーケース３の環境温度が上昇することがない（図４参照）。このため、冷蔵ショーケース３において商品を効率的に冷却することができる。   If the refrigerated showcases 3 whose installation locations are close to each other are classified into the same series, for example, it is possible to avoid the situation where one of the adjacent refrigerated showcases 3 is defrosted and the other product is cooled. Accordingly, the environmental temperature of the refrigerated showcase 3 during normal operation does not increase due to the temperature rise of the refrigerated showcase 3 during defrosting as shown in FIG. 7 (see FIG. 4). For this reason, goods can be efficiently cooled in the refrigerated showcase 3.

以上のように、本発明に冷却器システムは、スーパーマーケット、コンビニエンスストアなどの店舗に設置する冷蔵ショーケースシステムに有用であり、特に、複数の冷蔵ショーケースに冷媒を供給する冷凍機を備えた冷蔵ショーケースシステムに適している。   As described above, the cooler system according to the present invention is useful for a refrigerated showcase system installed in a store such as a supermarket or a convenience store, and in particular, a refrigerated system including a refrigerator that supplies refrigerant to a plurality of refrigerated showcases. Suitable for showcase system.

本発明の実施例に係る冷蔵ショーケースシステムを示すブロック図である。It is a block diagram which shows the refrigerated showcase system which concerns on the Example of this invention. 図１に示した冷蔵ショーケースと冷凍機の負荷を示す負荷変動図である。It is a load fluctuation figure which shows the load of the refrigerated showcase and refrigerator shown in FIG. 図１に示した冷蔵ショーケースと冷凍機の負荷を示す負荷変動図である。It is a load fluctuation figure which shows the load of the refrigerated showcase and refrigerator shown in FIG. 他の実施例に係る冷蔵ショーケースシステムの隣り合う冷蔵ショーケースの負荷を示す負荷変動図である。It is a load fluctuation figure which shows the load of the refrigerated showcase which adjoins the refrigerated showcase system which concerns on another Example. 従来技術に係る冷蔵ショーケースシステムを示すブロック図である。It is a block diagram which shows the refrigerated showcase system which concerns on a prior art. 図５に示した冷蔵ショーケースと冷凍機の負荷を示す負荷変動図である。It is a load fluctuation figure which shows the load of the refrigerated showcase and refrigerator shown in FIG. 図５に示した隣り合う冷蔵ショーケースの負荷を示す負荷変動図である。It is a load fluctuation figure which shows the load of the adjacent refrigerated showcase shown in FIG.

符号の説明Explanation of symbols

１ 冷蔵ショーケースシステム
２ 冷凍機
３ 冷蔵ショーケース
３１ 電磁弁
４ 制御装置 1 Refrigerated showcase system 2 Refrigerator 3 Refrigerated showcase 31 Solenoid valve 4 Control device

Claims (3)

一の冷凍機から複数の冷却器に冷媒を供給する冷却器システムにおいて、
前記冷却器が冷媒の流入量を制御するバルブと、運転情報を取得する温度調節センサとをそれぞれ備えるとともに系列ごとに分類され、
各温度調節センサから取得した運転情報に基づいて各バルブが冷凍機からの冷媒流入量を制御して各冷却器を所定の条件で運転する一方、
温度調節センサから取得した運転情報に基づいて除霜する冷却器を特定し、特定した冷却器が含まれる系列の冷却器全てのバルブを閉塞して同一系列の全ての冷却器を除霜することを特徴とする冷却器システム。 In a cooler system that supplies refrigerant from a single refrigerator to a plurality of coolers,
A valve the cooler to control the inflow of the refrigerant, are classified and a temperature regulation sensor for acquiring operation information on Rutotomoni each series with each
While each valve controls the refrigerant inflow amount from the refrigerator based on the operation information acquired from each temperature control sensor and operates each cooler under a predetermined condition,
Identify the cooler to be defrosted based on the operation information acquired from the temperature control sensor, and defrost all the coolers in the same series by closing the valves of all the coolers in the series including the identified cooler. A cooler system featuring. 収納される商品の必要冷却温度帯域が重複又は近接する冷却器を同一系列に分類したことを特徴とする請求項１に記載の冷却器システム。The cooler system according to claim 1, wherein the coolers in which the necessary cooling temperature bands of the stored products overlap or are close to each other are classified into the same series. 設置場所が近接する冷却器を同一系列に分類したことを特徴とする請求項１に記載の冷却器システム。The cooler system according to claim 1, wherein coolers having close installation locations are classified into the same series.
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