JPH0336475A - Storage ice level detector for ice making machine - Google Patents
Storage ice level detector for ice making machineInfo
- Publication number
- JPH0336475A JPH0336475A JP16925089A JP16925089A JPH0336475A JP H0336475 A JPH0336475 A JP H0336475A JP 16925089 A JP16925089 A JP 16925089A JP 16925089 A JP16925089 A JP 16925089A JP H0336475 A JPH0336475 A JP H0336475A
- Authority
- JP
- Japan
- Prior art keywords
- ice
- box
- detection plate
- ice storage
- detection
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 63
- 239000012811 non-conductive material Substances 0.000 claims 1
- 230000003068 static effect Effects 0.000 abstract description 5
- 239000004020 conductor Substances 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 5
- 235000014676 Phragmites communis Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Production, Working, Storing, Or Distribution Of Ice (AREA)
Abstract
Description
【発明の詳細な説明】
（イ〉産業上の利用分野
本発明は製氷装置にて製造された氷を貯蔵する貯氷庫を
備え、該貯氷庫の貯氷レベルを検出して製氷装置の運転
を制御るする製氷機の貯氷レベル検出装置に関するもの
である。Detailed Description of the Invention (A) Industrial Application Field The present invention is provided with an ice storage for storing ice produced by an ice making device, and detects the ice storage level in the ice storage to control the operation of the ice making device. This invention relates to an ice storage level detection device for an ice maker.
（口〉従来の技術
製氷機は、一般に生成した氷の量が貯氷庫の規定量に達
すると製氷運転を停止し、氷が消費されて規定量以下に
なると、製氷運転を再開するという具合に制御されてい
る。この氷の貯氷量を検知して製氷装置の運転を制御す
る具体的構成は、例えば実公昭６０−１１４２１号公報
に開示される機械式のものと、特開昭６２−２３７２６
４号公報に開示される電気式のものがある。(Existence) Conventional ice making machines generally stop ice making operation when the amount of ice produced reaches the specified amount in the ice storage, and restart ice making operation when the ice is consumed and becomes less than the specified amount. Specific configurations for detecting the amount of stored ice and controlling the operation of the ice-making device include, for example, a mechanical type disclosed in Japanese Utility Model Publication No. 11421/1982, and a type disclosed in Japanese Patent Application Laid-open No. 23726/1983.
There is an electric type disclosed in Publication No. 4.
前者のものは、製氷運転制御用リードスイッチを取り付
けた基板と、該リードスイッチを開閉する永久磁石を取
り付けた回動板により主構成した貯氷検知であり、後者
のものは赤外光のビームを用いた貯氷検知である。The former is an ice accumulation detection system that mainly consists of a board equipped with a reed switch for ice-making operation control and a rotating plate equipped with a permanent magnet that opens and closes the reed switch. This is the ice storage detection method used.
（八〉発明が解決しようとする課題
前者の従来技術は、溜ってきた氷によって回動板が押圧
回動することによって、永久磁石がリードスイッチを作
動して製氷動作を停止させるものであるが、回動板とい
う可動部があるので動作不良を起こし易く、安定したス
イッチ動作を得られ難く信頼性に大きな問題点があった
。(8) Problems to be Solved by the Invention In the former prior art, when a rotary plate is pressed and rotated by accumulated ice, a permanent magnet operates a reed switch and stops the ice-making operation. Since there is a movable part called a rotating plate, it is easy to malfunction, and it is difficult to obtain stable switch operation, which poses a major problem in reliability.
また、後者の従来技術は、透明度の高い氷の場合、赤外
光のビームが通過する恐れがあり、これも信頼性の面で
問題があった。Furthermore, in the latter conventional technique, in the case of highly transparent ice, there is a risk that the infrared light beam may pass through the ice, which also poses a problem in terms of reliability.
更に、いずれの従来技術も氷検出部が、貯氷庫内に設け
られているため、氷取り出し作業時にスコップが衝突し
て検出部を破損する問題点があった。Furthermore, in all of the conventional techniques, since the ice detecting section is provided in the ice storage, there is a problem that the detecting section may be damaged due to collision with a shovel during ice removal work.
本発明は上記問題点に鑑み、機械的動作を伴なわない貯
氷レベル検出装置として、正確な検知動作が期待でき、
製氷装置の運転制御を確実に成し得ると共に、故障や破
損の問題も解消した製氷機の貯氷レベル検出装置を提供
するものである。In view of the above problems, the present invention is an ice storage level detection device that does not involve mechanical operation, and can be expected to have accurate detection operation.
An object of the present invention is to provide an ice storage level detection device for an ice making machine that can reliably control the operation of the ice making machine and eliminate problems of failure and damage.
〈二〉課題を解決するための手段
本発明は上記課題を解決するために、製氷装置にて製造
された氷を貯蔵する貯氷庫を有し、該貯氷庫の貯氷レベ
ルを検出して前記製氷装置の運転を制御する製氷機にお
いて、前記貯氷庫を、非導電性の内箱及び第１電極部を
形成する導電性の外箱にて構成し、前記内箱の外面に第
２電極部を形成する氷検知板を設け、前記外箱を接地す
ると共に、該外箱と前記氷検知板間に氷が介在すること
により変化する静電容量を検出して、前記製氷装置の運
転を停止する制御信号を出力する静電容量検出回路を、
前記氷検知板に接続して成る製氷機の貯氷レベル検出装
置である。<2> Means for Solving the Problems In order to solve the above problems, the present invention has an ice storage for storing ice produced by an ice making device, and detects the ice storage level of the ice storage to detect the ice making device. In the ice making machine that controls the operation of the device, the ice storage is configured with a non-conductive inner box and a conductive outer box forming a first electrode part, and a second electrode part is provided on the outer surface of the inner box. An ice detection plate is provided to ground the outer box, and a capacitance that changes due to the presence of ice between the outer box and the ice detection plate is detected, and the operation of the ice making apparatus is stopped. The capacitance detection circuit that outputs the control signal is
This is an ice storage level detection device for an ice maker connected to the ice detection plate.
（＊〉作用
本発明によると、貯氷庫に氷が無かったり、貯氷レベル
が少ないときは、第１電極部としての外箱と第２電極部
としての氷検知板間は空気であるから静電容量は小さく
、この小さい静電容量を検出しているときは、静電容量
検出回路は製氷装置を停止せしめる制御信号を出力しな
い、そして、貯氷レベルが増加するに連れて静電容量も
増加し、遂に、貯氷レベルが氷検知板のレベルに達した
ときの静電容量を検出回路が検出すると、該静電容量検
出回路は製氷装置の運転を停止させる制御信号を出力す
る。(*〉According to the present invention, when there is no ice in the ice storage or the ice storage level is low, there is static electricity between the outer box as the first electrode part and the ice detection plate as the second electrode part because there is air between the outer box and the ice detection plate as the second electrode part.) The capacitance is small, and when detecting this small capacitance, the capacitance detection circuit will not output a control signal to stop the ice making device, and as the ice storage level increases, the capacitance will also increase. When the detection circuit finally detects the capacitance when the ice storage level reaches the level of the ice detection plate, the capacitance detection circuit outputs a control signal to stop the operation of the ice making device.
また、氷検知部としての電極部を貯木庫内に設けること
なく、貯氷レベルを検出することができ、スコップの衝
突による故障や破損を確実に防止することができる。Furthermore, the ice storage level can be detected without providing an electrode section as an ice detection section in the wood storage, and failures and damage caused by collisions of shovels can be reliably prevented.
（へ〉実施例
以下に本発明の実施例を第１図及び第２図を参照して説
明する。（１）は上部に氷落下通路（２）を画成すると
共にこれと連通して下部に貯氷室（３）を画成する貯氷
庫であり、ＡＢＳ樹脂等の非導電性の内箱（ＩＡ〉と、
第１電極部として作用する導電性の材料、例えばステン
レス製の外箱（ＩＢ〉と、両箱間に充填された発泡断熱
材（ＩＣ〉によって構成している。この貯氷庫（１〉の
上部に設置した冷凍装置は、周知のオーガ式製氷装置（
４）を構成する冷却筒（５〉を冷却するためのもので、
冷却筒（５）の外周に巻装した冷却コイル（６）に、圧
縮機（７）、凝縮器（８）、キルピラリ−チューブ（９
〉を介して冷媒を循環して蒸発させ、冷却する冷凍回路
を形成する。Embodiment Embodiments of the present invention will be described below with reference to FIGS. It is an ice storage compartment that defines an ice storage compartment (3), and includes a non-conductive inner box (IA) made of ABS resin, etc.
It consists of an outer box (IB) made of a conductive material, such as stainless steel, which acts as the first electrode part, and a foam insulation material (IC) filled between the two boxes.The upper part of the ice storage (1) The refrigeration equipment installed in
This is for cooling the cooling cylinder (5) that constitutes 4).
The cooling coil (6) wrapped around the outer circumference of the cooling cylinder (5) is equipped with a compressor (7), a condenser (8), and a kill pillar tube (9).
) to form a refrigeration circuit that circulates and evaporates the refrigerant through the refrigeration circuit.
また、製氷装置（４〉の冷却筒（５〉の水出口部には、
製氷装置（４）にて連続的に製造された小片状の氷（１
０〉を、氷落下通路（２）に放出せしめる氷導出筒（１
１〉が設けられている。In addition, at the water outlet of the cooling cylinder (5) of the ice making device (4),
Small pieces of ice (1
0〉 into the ice falling passageway (2).
1> is provided.
而して、貯氷庫（１）の貯氷室（３〉側内箱（ＩＡ）の
上部外面には、第２電極部として作用するステンレスや
鉄等の導電性の材料で形成した氷検知板（１２）を固着
している。この氷検知板（１２）４ｉ相隣る内箱（ＩＡ
）の外側面に跨って配設され、厚さ１ｍｍ程度、上下方
向の幅４０閣程度の板材を使用している。On the outer surface of the upper part of the inner box (IA) on the side of the ice storage compartment (3) of the ice storage compartment (1), there is an ice detection plate (made of a conductive material such as stainless steel or iron) that acts as a second electrode part. 12) is fixed.This ice detection plate (12) 4i adjacent inner box (IA
), and is made of a board with a thickness of about 1 mm and a width of about 40 mm in the vertical direction.
以上の構成において、外箱（ＩＢ〉と氷検知板（１２）
によって静電容量検知部が構成され、外箱（ＩＢ）を接
地状態にすると共に、氷検知板（１２）を貯氷庫（１）
を挿通する導線（１３）を介して貯氷庫（１）外の静電
容量検出回路（１４）に接続する。In the above configuration, the outer box (IB) and the ice detection plate (12)
The capacitance detection unit is configured by grounding the outer box (IB) and connecting the ice detection plate (12) to the ice storage (1).
It is connected to a capacitance detection circuit (14) outside the ice storage (1) via a conducting wire (13) inserted through the ice storage (1).
従って、外箱（ＩＢ）と氷検知板（１２）との間が空間
状態にある時は、その間の静電容量Ｃは空気のため小さ
いが、貯氷量が増加して遂に空気より誘電率の高い氷（
１０〉が氷検知板（１２）に対向する貯氷レベルに達す
ると、このときの外箱（ＩＢ〉と氷検知板（１２）間の
静電容量Ｃ゛を静電容量検出回路（１４〉が検出し、該
検出回路（１４〉からの制御信号は、製氷装置く４）の
コントロール回路とのコネクタを有する信号ケーブルク
１９〉にてコントロール回路に伝達され、製氷装置（４
〉の運転停止を制御することになる。Therefore, when the outer box (IB) and the ice detection plate (12) are in a space state, the capacitance C between them is small due to air, but as the amount of ice storage increases, the dielectric constant becomes higher than that of air. high ice (
10> reaches the ice storage level facing the ice detection plate (12), the capacitance detection circuit (14) detects the capacitance C' between the outer box (IB> and the ice detection plate (12)) The control signal from the detection circuit (14) is transmitted to the control circuit via the signal cable 19> having a connector with the control circuit of the ice making device (4).
〉 will be controlled to stop operation.
次に、第３図の制御ブロック回路図について説明すると
、Ｃは氷検知板（１２〉と接地状態にある外箱（ＩＢ）
との間の静電容量を示し、前記静電容量検出回路（１４
〉は、この静電容量Ｃを入力容量とする発振回路（１５
〉と、その後段の整流出力回路（１６〉より成り、発振
回路（ＩＳ〉は通常外箱（ＩＢ）と氷検知板（１２）間
が空気のため、入力容量Ｃが極端に小さく発振しない。Next, to explain the control block circuit diagram in Fig. 3, C is the ice detection plate (12) and the outer box (IB) in the grounded state.
shows the capacitance between the capacitance detection circuit (14
> is an oscillation circuit (15
) and a rectifier output circuit (16) at the subsequent stage, and the oscillation circuit (IS) normally has air between the outer box (IB) and the ice detection plate (12), so the input capacitance C is extremely small and does not oscillate.
又は、発振周波数が高くなり、その結果、振幅も小さく
なり、発振回路（１５）はその出力がゼロと見做せる状
態になっている。そして入力容量Ｃが増大し、遂に、氷
（１０〉が氷検知板（１２）に対向する貯氷レベルに達
すると、このときの静電容量Ｃ゛によって発振回路（１
５〉は発振動作し、その後段の整流出力回路（１６）に
パルス状電圧を印加する。１１流出力回路（１６〉はこ
のパルス電圧を整流し、直流出力電圧に変換し、次段の
コントロール回路〈１７）を動作させる。このコントロ
ール回路（１７〉の出力端にはリレー（Ｒｙ）を接続し
ており、そのリレー接点（Ｓｙ）を介して圧縮機（７〉
及びオーガモータ（１８〉の駆動並びに停止の制御を行
なう。（２１）は交流電源である。Alternatively, the oscillation frequency becomes higher, and as a result, the amplitude becomes smaller, so that the output of the oscillation circuit (15) can be considered to be zero. Then, the input capacitance C increases, and when the ice (10) finally reaches the ice storage level facing the ice detection plate (12), the capacitance C' at this time causes the oscillation circuit (1
5> operates in oscillation and applies a pulsed voltage to the rectifier output circuit (16) at the subsequent stage. The 11 output circuit (16) rectifies this pulse voltage, converts it into a DC output voltage, and operates the next stage control circuit (17). A relay (Ry) is connected to the output end of this control circuit (17>), and the compressor (7>
and controls the driving and stopping of the auger motor (18). (21) is an AC power source.
よって、発振回路（１５）の発振条件は、氷（１０）が
氷検知板（１２）に面対向するレベルに達したときの外
箱（１Ｂ）と氷検知板（１２）間の静電容量Ｃ゛によっ
て発振する。該発振回路（１５）が発振すると、整流出
力回路（１６）、コントロール回路（１７〉を動作させ
、リレー（Ｒｙ）を励磁してリレー接点（Ｓｙ）を切換
え、圧縮機（７〉及びオーガモータ（１８）を停止させ
る。製氷装置（４）の運転復帰は、氷（１０）が氷検知
板（１２〉との対向位置から下方に減少すると、発振器
り１５〉への入力容量Ｃが小さくなって、発振条件が不
成立となり、整流出力回路（１６〉からコントロール回
路（１７）がリレー（Ｒｙ）を励磁しておくほどの出力
電圧を得られず、リレー接点（５ｙ）は復帰し、再び圧
縮機（７）及びオーガモータ（１８〉が運転されて製氷
装置（０の運転を再開する。Therefore, the oscillation condition for the oscillation circuit (15) is the capacitance between the outer box (1B) and the ice detection plate (12) when the ice (10) reaches a level where it faces the ice detection plate (12). It oscillates due to C. When the oscillation circuit (15) oscillates, it operates the rectifier output circuit (16) and the control circuit (17>, excites the relay (Ry), switches the relay contact (Sy), and activates the compressor (7>) and auger motor ( 18).When the ice making device (4) returns to operation, as the ice (10) decreases downward from the position facing the ice detection plate (12>), the input capacitance C to the oscillator 15> becomes smaller. , the oscillation condition is not satisfied, and the control circuit (17) from the rectifier output circuit (16) cannot obtain an output voltage sufficient to excite the relay (Ry), and the relay contact (5y) returns to the compressor again. (7) and the auger motor (18) are operated to resume operation of the ice making device (0).
第４図は本発明の他の実施例を示しており、上記実施例
と同等若しくは相当する構成部は同一番号で示す。この
実施例は、氷落下通路（２）を画成する貯氷庫（１〉が
樹脂製のカバー（２０）によって構成され、このカバー
（２０〉の相隣る下部外側面に跨って氷検知板（１２〉
を固着するものである。この場合は、貯氷庫（１〉を挿
通することなく氷検知板（１２）と静電容量検出回路（
１４〉を導線（１３〉によって接続することができるの
で組立作業が容易となる。FIG. 4 shows another embodiment of the present invention, in which constituent parts that are equivalent or equivalent to those of the above embodiment are designated by the same numbers. In this embodiment, the ice storage (1) that defines the ice fall passage (2) is constituted by a resin cover (20), and the ice detection plate is placed over the outer surface of the lower part of the cover (20). (12)
It is something that fixes. In this case, the ice detection plate (12) and capacitance detection circuit (
14> can be connected by the conducting wire (13>), making assembly work easier.
また、上記各実施例辻、内箱（ＩＡ）やカバー（２０〉
が立方形状であるため、氷検知板（１２）を二側面に跨
って配設している。これによって、二側面で貯氷レベル
の検知動作を行なうことができ、検知動作の信頼性が向
上するものである。In addition, each of the above examples, inner box (IA) and cover (20)
Since it has a cubic shape, the ice detection plate (12) is disposed across two sides. As a result, the ice storage level can be detected on two sides, and the reliability of the detection operation is improved.
更に、第５図は貯氷庫（１）が円筒状に構成され、氷検
知板（１２）を円弧状に配設した例である。Further, FIG. 5 shows an example in which the ice storage (1) is configured in a cylindrical shape and the ice detection plates (12) are arranged in an arc shape.
（ト）発明の効果
本発明は以上の様に、電極式の貯氷レベル検出装置であ
り、氷検知部としての電極を、外箱と内箱の外面に配設
した氷検知板によって構成したことにより、貯氷庫内に
検知部が露出したり、突出することなく、貯氷庫の内面
をすっきり構成でき、スコップによる検知部の損傷や破
損を確実に防止することができると共に、貯氷庫内の洗
浄を容易に行なうことができる利点を奏する。(G) Effects of the Invention As described above, the present invention is an electrode type ice storage level detection device, and the electrode as an ice detection section is constituted by ice detection plates arranged on the outer surfaces of the outer box and the inner box. This allows the inner surface of the ice storage to be neatly constructed without the detection part being exposed or protruding into the ice storage, making it possible to reliably prevent the detection part from being damaged or destroyed by a shovel, and making it possible to clean the inside of the ice storage. This has the advantage that it can be easily carried out.
また、機械式の如き動作不良や水垢付着による誤動作の
心配もなく頗る信頼性に優れるものである。In addition, there is no fear of malfunctions like mechanical ones or malfunctions due to limescale adhesion, and the system is highly reliable.
第１図は本発明め装置を具備する製氷機の縦断面図、第
２図は本発明の要部斜視図、第３図は製氷装置の運転制
御ブロック図、第４図は本発明の他の実施例を示する縦
断面図、第５図は貯氷庫形態の他の実施例を示す斜視図
である。
（１）・・・貯氷庫、 （ＩＡ〉・・・内箱、 （ＩＢ
）・・・外箱、（０・・・製氷装置、 （１２）・・・
氷検知板、 （１４〉・・・静電容量検出回路。Fig. 1 is a longitudinal cross-sectional view of an ice making machine equipped with the device of the present invention, Fig. 2 is a perspective view of essential parts of the present invention, Fig. 3 is an operation control block diagram of the ice making device, and Fig. 4 is a diagram of an ice making machine equipped with the device of the present invention. FIG. 5 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 5 is a perspective view showing another embodiment of the ice storage form. (1)...Ice storage, (IA>...Inner box, (IB)
)... Outer box, (0... Ice making device, (12)...
Ice detection plate, (14>... Capacitance detection circuit.
Claims (1)
、該貯氷庫の貯氷レベルを検出して前記製氷装置の運転
を制御する製氷機において、前記貯氷庫を、非導電性の
内箱及び第１電極部を形成する導電性の外箱にて構成し
、前記内箱の外面に第２電極部を形成する氷検知板を設
け、前記外箱を接地すると共に、該外箱と前記氷検知板
間に氷が介在することにより変化する静電容量を検出し
て、前記製氷装置の運転を停止する制御信号を出力する
静電容量検出回路を、前記氷検知板に接続したことを特
徴とする製氷機の貯氷レベル検出装置。1. In an ice maker that has an ice storage for storing ice produced by the ice maker and controls the operation of the ice maker by detecting the ice storage level in the ice storage, the ice storage is made of a non-conductive material. It is composed of an inner box and a conductive outer box that forms a first electrode part, and an ice detection plate that forms a second electrode part is provided on the outer surface of the inner box, and the outer box is grounded and the outer box is grounded. and a capacitance detection circuit connected to the ice detection plate, which detects capacitance that changes due to the presence of ice between the ice detection plate and outputs a control signal to stop operation of the ice making device. An ice storage level detection device for an ice maker, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16925089A JPH0336475A (en) | 1989-06-29 | 1989-06-29 | Storage ice level detector for ice making machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16925089A JPH0336475A (en) | 1989-06-29 | 1989-06-29 | Storage ice level detector for ice making machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0336475A true JPH0336475A (en) | 1991-02-18 |
Family
ID=15883029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16925089A Pending JPH0336475A (en) | 1989-06-29 | 1989-06-29 | Storage ice level detector for ice making machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0336475A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999058911A1 (en) * | 1998-05-14 | 1999-11-18 | Hoshizaki America, Inc. | Photoelectric ice bin control system |
| WO2021213528A1 (en) * | 2020-07-16 | 2021-10-28 | 青岛海尔电冰箱有限公司 | Ice making device and refrigerator |
-
1989
- 1989-06-29 JP JP16925089A patent/JPH0336475A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999058911A1 (en) * | 1998-05-14 | 1999-11-18 | Hoshizaki America, Inc. | Photoelectric ice bin control system |
| WO2021213528A1 (en) * | 2020-07-16 | 2021-10-28 | 青岛海尔电冰箱有限公司 | Ice making device and refrigerator |
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