JP2010169304A - Control device for ice making machine - Google Patents

Control device for ice making machine Download PDF

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JP2010169304A
JP2010169304A JP2009011627A JP2009011627A JP2010169304A JP 2010169304 A JP2010169304 A JP 2010169304A JP 2009011627 A JP2009011627 A JP 2009011627A JP 2009011627 A JP2009011627 A JP 2009011627A JP 2010169304 A JP2010169304 A JP 2010169304A
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ice making
ice
making machine
control device
auger
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JP5262748B2 (en
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Sukeo Yoshida
祐生 吉田
Tatsuya Kobayashi
達也 小林
Yuichi Takahashi
裕一 高橋
Katsuyuki Osawa
克之 大澤
Masahiro Yoshino
正洋 吉野
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Fuji Electric Retail Systems Co Ltd
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Fuji Electric Retail Systems Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device for an ice making machine capable of reducing production of soft ice. <P>SOLUTION: This control device 100 for the auger-type ice making machine 10 including a compressor 24 connected with an evaporator 20 for cooling the inside of an ice making section 14, and an ice making machine motor 18 for rotating and driving an auger 12 incorporated in the ice making section 14, performs the control to start the ice making machine motor 18 after the compressor 24 is started, in starting an ice making operation. The temperature of the evaporator 20 from the start of the compressor 24 to the start of the ice making machine motor 18 is kept and controlled at -5 to 5°C, and the temperature of the evaporator 20 just after the start of the ice making machine motor 18 is controlled to be quickly lowered. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、製氷機の制御装置に関する。   The present invention relates to an ice making machine control device.

従来、所定形状の氷塊を製造するオーガ式製氷機において、製氷運転開始の際に、製氷機モータと圧縮機とを同時に起動して製氷を行う製氷機の制御装置が知られている（例えば、特許文献１参照）。   Conventionally, in an auger type ice making machine that manufactures ice blocks of a predetermined shape, an ice making machine control device that performs ice making by simultaneously starting an ice making motor and a compressor at the start of ice making operation is known (for example, Patent Document 1).

図３は、このようなオーガ式製氷機の一例を示す側断面図である。図３に示すように、オーガ式製氷機１は、スクリュー状の回転式切削刃からなるオーガ２を内蔵した製氷筒３と、製氷筒３の上部に連結した貯氷室４と、オーガ２を回転駆動する製氷機モータ５との組立体から構成され、圧縮機６と接続した製氷筒３内壁のエバポレータ７面に薄く着氷した氷をオーガ２で削り取りながら上方に送り、固定刃８で切り取った氷片を貯氷室４に貯氷する。   FIG. 3 is a side sectional view showing an example of such an auger type ice making machine. As shown in FIG. 3, the auger type ice making machine 1 includes an ice making cylinder 3 incorporating an auger 2 made of a screw-like rotary cutting blade, an ice storage chamber 4 connected to the upper part of the ice making cylinder 3, and the auger 2. It consists of an assembly with an ice making machine motor 5 that is driven, and the ice that has thinly formed on the surface of the evaporator 7 on the inner wall of the ice making cylinder 3 connected to the compressor 6 is sent upward while being scraped by the auger 2 and cut by the fixed blade 8. Ice pieces are stored in the ice storage chamber 4.

貯氷室４は、円筒状の断熱容器であり、その下部周面に開口した図示しない氷片払い出し用の吐出扉を備える。また、貯氷室４内にはオーガ２の上端に連結した縦軸の回転軸９と、この回転軸９から放射状に複数本突き出たアジテータ９ａを備える。製氷動作中にはオーガ２と連動して回転するアジテータ９ａが貯氷室４内の氷片を攪拌し、貯氷室４内の氷片同士が溶着して大きな氷塊になるのを防ぐようにしてある。   The ice storage chamber 4 is a cylindrical heat insulating container, and includes a discharge door for discharging ice pieces (not shown) opened in a lower peripheral surface thereof. The ice storage chamber 4 is provided with a vertical rotation shaft 9 connected to the upper end of the auger 2, and a plurality of agitators 9 a projecting radially from the rotation shaft 9. During the ice making operation, the agitator 9a that rotates in conjunction with the auger 2 stirs the ice pieces in the ice storage chamber 4 to prevent the ice pieces in the ice storage chamber 4 from welding to form a large ice block. .

さらに、貯氷室４内の上部には検知プレート４ａが上下動可能に配置してあり、図示しない検知スイッチによって貯氷量を検知するようにしてある。従来のオーガ式製氷機の制御装置においては、貯氷室４内の氷片が所定量に達すると検知プレート４ａを介して検知スイッチがＯＦＦし、圧縮機６およびオーガ２（製氷機モータ５）の回転駆動が停止され製氷動作を中断する。一方、貯氷室４内の氷片が所定量以下に減少すると検知スイッチがＯＮし、圧縮機６およびオーガ２（製氷機モータ５）の回転駆動が開始され、製氷運転が再開される。このようにして、製氷運転と停止が繰り返される。   Further, a detection plate 4a is arranged in the upper part of the ice storage chamber 4 so as to be movable up and down, and the amount of ice storage is detected by a detection switch (not shown). In a conventional auger type ice machine control device, when the ice pieces in the ice storage chamber 4 reach a predetermined amount, the detection switch is turned off via the detection plate 4a, and the compressor 6 and the auger 2 (ice machine motor 5) are turned off. The rotation drive is stopped and the ice making operation is interrupted. On the other hand, when the ice pieces in the ice storage chamber 4 are reduced to a predetermined amount or less, the detection switch is turned on, the rotation driving of the compressor 6 and the auger 2 (ice making motor 5) is started, and the ice making operation is resumed. In this way, the ice making operation and the stop are repeated.

特開２００１−１４１３４４号公報JP 2001-141344 A

しかしながら、上記の圧縮機６と製氷機モータ５とを同時起動する従来の製氷機の制御装置では、使用する冷媒の種類や外気温度によっては製氷運転開始からしばらくの間（例えば５分程度）は柔らかい氷が生成されてしまう。このため、起動のＯＮ−ＯＦＦを長時間繰り返す間に、この柔らかい氷が氷片同士の隙間に入り込んで接着剤のような働きをし、最終的には貯氷室４内の氷片を環状に繋げて固めてしまうという問題があった（以下、この現象を「ドーナツ氷現象」と呼ぶ。）。このドーナツ氷現象が発生すると、貯氷室４から氷片が払い出されなくなるという不具合を引き起こしてしまう。   However, in the conventional ice making control device that starts the compressor 6 and the ice making motor 5 at the same time, depending on the type of refrigerant used and the outside air temperature, the ice making operation may start for a while (for example, about 5 minutes). Soft ice will be generated. For this reason, the soft ice enters the gaps between the ice pieces while repeating the ON-OFF of the activation for a long time, and acts as an adhesive, and finally the ice pieces in the ice storage chamber 4 are annularly formed. There was a problem of linking and hardening (hereinafter, this phenomenon is called “doughnut ice phenomenon”). When this donut ice phenomenon occurs, it causes a problem that ice pieces are not discharged from the ice storage chamber 4.

本発明は、上記実情に鑑みてなされたものであり、製氷運転開始時の柔らかい氷の生成を少なくすることができる製氷機の制御装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object thereof is to provide a control device for an ice making machine that can reduce the generation of soft ice at the start of ice making operation.

上記の目的を達成するために、本発明の請求項１に係る製氷機の制御装置は、製氷部内を冷却するエバポレータに接続した圧縮機と、前記製氷部内に内蔵されるオーガを回転駆動する製氷機モータとを備えるオーガ式製氷機の制御装置において、製氷運転開始時に、前記圧縮機を起動した後で前記製氷機モータを起動する制御を行うことを特徴とする。   In order to achieve the above object, a control device for an ice making machine according to claim 1 of the present invention includes a compressor connected to an evaporator that cools the inside of the ice making unit, and an ice making unit that rotationally drives an auger built in the ice making unit. An auger type ice making machine control device comprising a machine motor is characterized in that, at the start of an ice making operation, a control for starting the ice making machine motor is performed after starting the compressor.

また、本発明の請求項２に係る製氷機の制御装置は、上述した請求項１において、前記圧縮機を起動してから前記製氷機モータを起動するまでの間の前記エバポレータの温度を−５〜５℃に維持制御するとともに、前記製氷機モータの起動直後の前記エバポレータの温度を急冷制御することを特徴とする。   In addition, the control device for an ice making machine according to claim 2 of the present invention is the above-described control device according to claim 1, wherein the temperature of the evaporator between starting the compressor and starting the ice making motor is -5. The temperature of the evaporator immediately after start-up of the ice maker motor is controlled to be rapidly cooled while maintaining at -5 ° C.

また、本発明の請求項３に係る製氷機の制御装置は、上述した請求項２において、前記製氷機モータの起動前の前記エバポレータの温度を１〜３℃に制御することを特徴とする。   The control device for an ice making machine according to claim 3 of the present invention is characterized in that, in claim 2 described above, the temperature of the evaporator before starting the ice making machine motor is controlled to 1 to 3 ° C.

本発明によれば、製氷部内を冷却するエバポレータに接続した圧縮機と、前記製氷部内に内蔵されるオーガを回転駆動する製氷機モータとを備えるオーガ式製氷機の制御装置において、製氷運転開始時に、前記圧縮機を起動した後で前記製氷機モータを起動する制御を行うので、製氷部はオーガの回転に先行して予め冷却され、製氷部への氷結のタイミングを早めることができ、製氷運転開始時の柔らかい氷の生成を少なくすることができる。   According to the present invention, in an auger type ice maker control device comprising a compressor connected to an evaporator that cools the inside of an ice making unit, and an ice making motor that rotationally drives an auger built in the ice making unit, at the start of ice making operation Since the ice making motor is controlled after starting the compressor, the ice making unit is cooled in advance prior to the rotation of the auger, so that the timing of freezing to the ice making unit can be advanced, and the ice making operation Soft ice formation at the start can be reduced.

以下に添付図面を参照しながら、本発明に係る製氷機の制御装置の好適な実施の形態を詳細に説明する。図１は、本発明に係る製氷機の制御装置の概略構成図である。   Exemplary embodiments of a control device for an ice making machine according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of a control device for an ice making machine according to the present invention.

図１に示すように、本発明に係る製氷機の制御装置１００は、オーガ式製氷機１０を制御するものである。オーガ式製氷機１０は、オーガ１２を内蔵する製氷部としての製氷筒１４と、製氷筒１４の上部に連結した貯氷室１６と、オーガ１２を回転駆動する製氷機モータ１８と、製氷筒１４内壁に巻回したエバポレータ２０と、エバポレータ２０に接続した冷媒回路２２とを備える。冷媒回路２２は、圧縮機２４と、凝縮器２６と、凝縮器用ファン２８と、ドライヤ３０と、電子膨張弁３２とを含んで構成される。この構成において、圧縮機２４と製氷機モータ１８とを駆動し、製氷筒１４内壁のエバポレータ２０面に薄く着氷した氷をオーガ１２で削り取りながら上方に送り、固定刃４０で切り取った氷片を貯氷室１６に貯氷するものである。   As shown in FIG. 1, an ice making machine control device 100 according to the present invention controls an auger type ice making machine 10. The auger type ice making machine 10 includes an ice making cylinder 14 serving as an ice making unit incorporating an auger 12, an ice storage chamber 16 connected to an upper portion of the ice making cylinder 14, an ice making motor 18 that rotationally drives the auger 12, and an inner wall of the ice making cylinder 14. And an evaporator 20 wound around the evaporator 20 and a refrigerant circuit 22 connected to the evaporator 20. The refrigerant circuit 22 includes a compressor 24, a condenser 26, a condenser fan 28, a dryer 30, and an electronic expansion valve 32. In this configuration, the compressor 24 and the ice maker motor 18 are driven, and the ice that is thinly deposited on the surface of the evaporator 20 on the inner wall of the ice making cylinder 14 is sent upward while scraping with the auger 12, and the ice pieces cut with the fixed blade 40 are sent. The ice is stored in the ice storage chamber 16.

貯氷室１６は、円筒状の断熱容器であり、その下部周面に開口した図示しない氷片払い出し用の吐出扉を備える。貯氷室１６内にはオーガ１２の上端に連結した縦軸の回転軸３４と、この回転軸３４から放射状に複数本突き出たアジテータ３６が設けてある。製氷動作中にはオーガ１２と連動して回転するアジテータ３６が貯氷室１６内の氷片を攪拌し、貯氷室１６内の氷片同士が溶着して大きな氷塊になるのを防ぐようにしてある。   The ice storage chamber 16 is a cylindrical heat insulating container, and includes a discharge door for discharging ice pieces (not shown) opened in a lower peripheral surface thereof. In the ice storage chamber 16, a vertical rotation shaft 34 connected to the upper end of the auger 12 and a plurality of agitators 36 protruding radially from the rotation shaft 34 are provided. During the ice making operation, the agitator 36 that rotates in conjunction with the auger 12 stirs the ice pieces in the ice storage chamber 16 to prevent the ice pieces in the ice storage chamber 16 from welding to form a large ice block. .

貯氷室１６内の上部には検知プレート３８が上下動可能に配置してあり、図示しない検知スイッチによって貯氷量を検知するようにしてある。貯氷室１６内の氷片が所定量に達すると検知プレート３８を介して検知スイッチがＯＦＦし、圧縮機２４およびオーガ１２（製氷機モータ１８）の回転駆動が停止され製氷動作を中断する。一方、貯氷室１６内の氷片が所定量以下に減少すると検知スイッチがＯＮし、圧縮機２４およびオーガ１２（製氷機モータ１８）の回転駆動が開始され、製氷運転が再開される。このようにして、製氷運転と停止が繰り返される。   A detection plate 38 is disposed in the upper part of the ice storage chamber 16 so as to be movable up and down, and an ice storage amount is detected by a detection switch (not shown). When the ice pieces in the ice storage chamber 16 reach a predetermined amount, the detection switch is turned off via the detection plate 38, the rotation drive of the compressor 24 and the auger 12 (ice machine motor 18) is stopped, and the ice making operation is interrupted. On the other hand, when the ice pieces in the ice storage chamber 16 are reduced to a predetermined amount or less, the detection switch is turned ON, the rotational drive of the compressor 24 and the auger 12 (ice making motor 18) is started, and the ice making operation is resumed. In this way, the ice making operation and the stop are repeated.

ここで、本発明の製氷機の制御装置１００は、製氷運転開始時において、圧縮機２４の起動タイミングと製氷機モータ１８の起動タイミングに時間差を設けた制御を行う。より具体的には、圧縮機２４を先に起動し、その後、製氷機モータ１８を起動するものである。なお、この制御は、外気温度に応じて行うようにしてもよく、例えば、外気温度を検知するセンサを設け、このセンサの検知信号に基づいて圧縮機２４および製氷機モータ１８を起動制御してもよい。   Here, the ice making machine control device 100 according to the present invention performs control with a time difference between the start timing of the compressor 24 and the start timing of the ice making motor 18 at the start of the ice making operation. More specifically, the compressor 24 is started first, and then the ice making machine motor 18 is started. This control may be performed according to the outside air temperature. For example, a sensor for detecting the outside air temperature is provided, and the compressor 24 and the ice maker motor 18 are controlled to start based on the detection signal of this sensor. Also good.

図２は、本発明に係る製氷機の制御装置１００によるタイムチャート図である。図２に示すように、制御装置１００は、製氷機モータ１８の起動直前までは、エバポレータ２０の温度が−５〜５℃、好ましくは水が凍らない程度の１〜３℃になるように、電子膨張弁３２の開度を制御して予冷制御を行う（図２の区間Ａ）。そして、製氷機モータ１８の起動直後は、電子膨張弁３２の開度を制御してエバポレータ２０の温度を製氷可能な温度に急冷制御する（図２の区間Ｂ）。この区間Ｂは、厳密には柔らかい氷が生成される可能性があるため、可能な限り短くするのが好ましい。その後、エバポレータ２０の温度を製氷可能な温度に冷却するように電子膨張弁３２の開度を制御する（図２の区間Ｃ）。この区間Ｃによって、固い氷が安定して生成されるようになる。   FIG. 2 is a time chart of the ice making machine control device 100 according to the present invention. As shown in FIG. 2, the control device 100 is configured so that the temperature of the evaporator 20 is −5 to 5 ° C., preferably 1 to 3 ° C. until water is not frozen, immediately before the ice making motor 18 is started. Pre-cooling control is performed by controlling the opening degree of the electronic expansion valve 32 (section A in FIG. 2). Immediately after the start of the ice making machine motor 18, the opening degree of the electronic expansion valve 32 is controlled to rapidly control the temperature of the evaporator 20 to a temperature at which ice making is possible (section B in FIG. 2). Strictly speaking, soft ice may be generated in this section B, so it is preferable to make it as short as possible. Then, the opening degree of the electronic expansion valve 32 is controlled so that the temperature of the evaporator 20 is cooled to a temperature capable of making ice (section C in FIG. 2). Due to this section C, hard ice is stably generated.

このような制御により、製氷筒１４内壁への氷結のタイミングを早めることができ、この結果、柔らかい氷の生成が少なくなるので、貯氷室１６内のドーナツ氷現象の発生を抑制することが可能になる。また、柔らかい氷の生成量が減るので、固くて安定した品質の粒状の氷を貯氷室１６内に貯氷することができる。   By such control, the timing of icing on the inner wall of the ice making cylinder 14 can be advanced, and as a result, the generation of soft ice is reduced, so that the occurrence of the donut ice phenomenon in the ice storage chamber 16 can be suppressed. Become. Further, since the generation amount of soft ice is reduced, hard and stable quality granular ice can be stored in the ice storage chamber 16.

また、製氷機モータ１８の起動直前のエバポレータ２０の温度を１〜３℃に制御して過冷却（１〜３℃以下）を防止することで、製氷機モータ１８が起動時にロックすることを予防することができる。   Further, by controlling the temperature of the evaporator 20 immediately before starting the ice making motor 18 to 1 to 3 ° C. to prevent overcooling (1 to 3 ° C. or less), the ice making motor 18 is prevented from being locked at the time of starting. can do.

以上説明したように、本発明によれば、製氷部内を冷却するエバポレータに接続した圧縮機と、製氷部内に内蔵されるオーガを回転駆動する製氷機モータとを備えるオーガ式製氷機の制御装置において、製氷運転開始時に、圧縮機を起動した後で製氷機モータを起動する制御を行うので、製氷部はオーガの回転に先行して予め冷却され、製氷部への氷結のタイミングを早めることができ、製氷運転開始時の柔らかい氷の生成を少なくすることができる。   As described above, according to the present invention, in the control device for an auger type ice maker comprising a compressor connected to an evaporator that cools the inside of the ice making unit, and an ice maker motor that rotationally drives the auger built in the ice making unit. At the start of ice making operation, the ice making machine motor is controlled after starting the compressor, so the ice making part is cooled in advance prior to the rotation of the auger, and the timing of freezing to the ice making part can be accelerated. The generation of soft ice at the start of ice making operation can be reduced.

本発明に係る製氷機の制御装置の一例を示す概略構成図である。It is a schematic block diagram which shows an example of the control apparatus of the ice making machine which concerns on this invention. 本発明に係る製氷機の制御装置によるタイムチャート図である。It is a time chart figure by the control apparatus of the ice making machine which concerns on this invention. 従来のオーガ式製氷機の側断面図である。It is a sectional side view of the conventional auger type ice making machine.

１０ オーガ式製氷機
１２ オーガ
１４ 製氷筒（製氷部）
１６ 貯氷室
１８ 製氷機モータ
２０ エバポレータ
２２ 冷媒回路
２４ 圧縮機
２６ 凝縮器
２８ 凝縮器用ファン
３０ ドライヤ
３２ 電子膨張弁
３４ 回転軸
３６ アジテータ
３８ 検知プレート
４０ 固定刃
１００ 製氷機の制御装置 10 auger type ice making machine 12 auger 14 ice making cylinder (ice making part)
DESCRIPTION OF SYMBOLS 16 Ice storage room 18 Ice machine motor 20 Evaporator 22 Refrigerant circuit 24 Compressor 26 Condenser 28 Condenser fan 30 Dryer 32 Electronic expansion valve 34 Rotating shaft 36 Agitator 38 Detection plate 40 Fixed blade 100 Control apparatus of ice machine

Claims (3)

製氷部内を冷却するエバポレータに接続した圧縮機と、前記製氷部内に内蔵されるオーガを回転駆動する製氷機モータとを備えるオーガ式製氷機の制御装置において、
製氷運転開始時に、前記圧縮機を起動した後で前記製氷機モータを起動する制御を行うことを特徴とする製氷機の制御装置。 In a control device for an auger type ice maker comprising a compressor connected to an evaporator that cools the inside of the ice making unit, and an ice making motor that rotationally drives an auger built in the ice making unit,
A control apparatus for an ice making machine, characterized in that, at the start of an ice making operation, control is performed to start the ice making motor after starting the compressor. 前記圧縮機を起動してから前記製氷機モータを起動するまでの間の前記エバポレータの温度を−５〜５℃に維持制御するとともに、前記製氷機モータの起動直後の前記エバポレータの温度を急冷制御することを特徴とする請求項１に記載の製氷機の制御装置。   The temperature of the evaporator between the start of the compressor and the start of the ice maker motor is maintained and controlled at −5 to 5 ° C., and the temperature of the evaporator immediately after the start of the ice maker motor is controlled to be rapidly cooled. The ice making machine control device according to claim 1, wherein: 前記製氷機モータの起動前の前記エバポレータの温度を１〜３℃に制御することを特徴とする請求項２に記載の製氷機の制御装置。   3. The ice making machine control device according to claim 2, wherein the temperature of the evaporator before starting the ice making motor is controlled to 1 to 3 ° C. 3.
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