JP2020118405A - refrigerator - Google Patents

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JP2020118405A
JP2020118405A JP2019011801A JP2019011801A JP2020118405A JP 2020118405 A JP2020118405 A JP 2020118405A JP 2019011801 A JP2019011801 A JP 2019011801A JP 2019011801 A JP2019011801 A JP 2019011801A JP 2020118405 A JP2020118405 A JP 2020118405A
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ice tray
motor
pump motor
water supply
vacuum pump
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JP7072529B2 (en
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駿 村松
Shun MURAMATSU
駿 村松
隆人 関根
Takahito Sekine
隆人 関根
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Hitachi Global Life Solutions Inc
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Abstract

To provide a refrigerator capable of performing abnormality detection of a plurality of motors during normal operation, with a simple circuit structure.SOLUTION: A refrigerator includes: an ice tray; a motor for rotating ice tray for rotating the ice tray; a water supply pump for supplying water to the ice tray; a pump motor for ice tray water supply for driving the water supply pump; a first driver for outputting supply of an operation current to the motor for rotating ice tray and the pump motor for ice tray water supply or a supply command of the operation current, while one out of the motor for rotating ice tray and the pump motor for ice tray water supply is operating, so as not to allow the other motor to operate; and an operation detection part which detects the operation current supplied to one out of the motor for rotating ice tray and the pump motor for ice tray water supply, and which is common to the motor for rotating ice tray and the pump motor for ice tray water supply.SELECTED DRAWING: Figure 2

Description

本発明は、冷蔵庫に関する。 The present invention relates to a refrigerator.

特許文献１は、温度制御を停止するとともに、複数の断線検出用リード線の接続を順次切換えながら断線検出用リード線に流れる電流を取り込み、その電流量に基づいてヒータの断線の有無を検出する方法を開示する（００１０）。すなわち、通常の温度制御を敢えて停止した上で、リレーを使って断線検知対象を順次切り替えて、断線検出用リード線３に流れる電流値に基づいて断線警報器でヒータに断線がないか確認する構成を開示する。 In Patent Document 1, the temperature control is stopped, and while the connection of a plurality of disconnection detection lead wires is sequentially switched, the current flowing in the disconnection detection lead wire is taken in and the presence or absence of disconnection of the heater is detected based on the amount of the current. A method is disclosed (0010). That is, after the normal temperature control is intentionally stopped, the disconnection detection target is sequentially switched using the relay, and based on the current value flowing in the disconnection detection lead wire 3, the disconnection alarm is used to confirm whether the heater is disconnected. The configuration is disclosed.

特開２００１−１５２４７号公報JP 2001-15247 A

特許文献１は、ヒータの故障（断線）の検査を行うものであり、対象のヒータについて、断線検知用の制御を通常の駆動とは別に実行する必要がある。ヒータによる加熱を行うべきか停止すべきかといったヒータの必要性を検出しようとするものではない。 Patent Document 1 is for inspecting a heater for failure (disconnection), and it is necessary to execute control for disconnection detection for the target heater separately from normal driving. It is not intended to detect the necessity of the heater such as whether the heating by the heater should be performed or stopped.

上記事情に鑑みてなされた本発明は、
製氷皿と、該製氷皿を回動させる製氷皿回動用モータと、
前記製氷皿に給水する給水ポンプと、該給水ポンプを駆動させる製氷皿給水用ポンプモータと、
前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータへの運転電流の供給又は運転電流の供給指令を、前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータのいずれか１つが運転している間、他方のモータを運転させないように出力する第１ドライバと、
前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータのいずれかに供給された運転電流を検知する、前記製氷皿回動用モータと前記製氷皿給水用ポンプモータとで共通の運転検知部と、を有する冷蔵庫である。 The present invention made in view of the above circumstances,
An ice tray and an ice tray rotating motor for rotating the ice tray,
A water supply pump for supplying water to the ice tray, and an ice tray water supply pump motor for driving the water supply pump,
One of the ice tray rotation motor and the ice tray water supply pump motor operates to supply an operating current or an operating current supply command to the ice tray rotation motor and the ice tray water supply pump motor. A first driver that outputs so as not to operate the other motor while
An operation detection unit common to the ice tray rotation motor and the ice tray water supply pump motor, which detects an operating current supplied to one of the ice tray rotation motor and the ice tray water supply pump motor, It is a refrigerator having.

本発明によれば、運転検知部を共通化して部品点数を抑制し、対象の部品の通常駆動を観察することで、敢えて通常の制御とは別の制御を実行せずとも検査を行うことができる。 According to the present invention, it is possible to perform an inspection without intentionally executing a control different from the normal control by observing the normal drive of the target component by sharing the operation detection unit to suppress the number of components. it can.

実施例１の冷蔵庫の横断面図Cross-sectional view of the refrigerator of the first embodiment 実施例１のモータ異常検出回路ブロックMotor abnormality detection circuit block of the first embodiment 実施例１のＩＭモータ及び真空ポンプモータの第１動作タイムチャートFirst operation time chart of the IM motor and the vacuum pump motor of the first embodiment 実施例１のＩＭモータ及び真空ポンプモータの第２動作タイムチャートSecond operation time chart of the IM motor and vacuum pump motor of the first embodiment

以下、添付の図面を参照しながら本発明の実施例について説明する。本発明の各種の構成要素は必ずしも個々に独立したものである必要はなく、一の構成要素が複数の部材から成ること、複数の構成よそが位置の部材から成ること、等を許容する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The various components of the present invention do not necessarily have to be independent of each other, and one component can be made up of a plurality of members, a plurality of components can be made up of positional members, and the like.

図１は実施例１の冷蔵庫の横断面図である。冷蔵庫は、上から順に２つの冷蔵室と、冷凍室と、野菜室とを有する。例えば冷蔵室内には、給水タンク２０及び給水タンク２０内の水を汲み上げる給水ポンプモータ２が配されている。冷凍室内には、製氷皿１０と、製氷皿１０を回動させる製氷皿回動用モータ１が配されている。給水ポンプモータ２で汲み上げられた水は、製氷皿１０に供給される。 FIG. 1 is a cross-sectional view of the refrigerator according to the first embodiment. The refrigerator has two refrigerating rooms, a freezing room, and a vegetable room in order from the top. For example, a water supply tank 20 and a water supply pump motor 2 for pumping water in the water supply tank 20 are arranged in the refrigerating room. An ice tray 10 and an ice tray rotating motor 1 for rotating the ice tray 10 are arranged in the freezing compartment. The water pumped up by the water supply pump motor 2 is supplied to the ice tray 10.

また、図１の断面では看取できないが、冷蔵室内には真空貯蔵室と真空貯蔵室を脱気する真空ポンプモータ３が配されている。また、冷蔵庫の冷凍サイクルやモータ１〜３を制御する制御装置（例えば制御マイコン８）が配されている。 Although not visible in the cross section of FIG. 1, a vacuum storage chamber and a vacuum pump motor 3 for degassing the vacuum storage chamber are arranged in the refrigeration chamber. Further, a control device (for example, a control microcomputer 8) that controls the refrigeration cycle of the refrigerator and the motors 1 to 3 is arranged.

図２は実施例１に係るモータ異常検出回路ブロックである。自動製氷機能で使用する製氷皿回動用モータ１及び給水ポンプモータ２は第１モータドライバＩＣ４で駆動され、真空ポンプモータ３は第２モータドライバＩＣ５で駆動される。各モータ１〜３の運転電流は各モータドライブＩＣのＧＮＤ部に共通で接続したシャント抵抗６（運転検知部）を介して電圧に変換した後にオペアンプ７で増幅され制御マイコン８に入力される。 FIG. 2 is a motor abnormality detection circuit block according to the first embodiment. The ice tray rotating motor 1 and the water supply pump motor 2 used in the automatic ice making function are driven by the first motor driver IC 4, and the vacuum pump motor 3 is driven by the second motor driver IC 5. The operating current of each of the motors 1 to 3 is converted into a voltage via the shunt resistor 6 (operation detecting unit) commonly connected to the GND portion of each motor drive IC, and then amplified by the operational amplifier 7 and input to the control microcomputer 8.

自動製氷機能では、例えば給水後一定時間が経過したら製氷が完了したと判定する。製氷皿１０を製氷皿回動用モータ１で回動させて氷を製氷皿１０から離脱させる離氷動作を実行する。その後、給水ポンプモータ２が水を汲み上げて製氷皿１０に給水し、給水した水が凍り製氷が完了するまで、予め定められた一定時間待機する。製氷完了後、再び離氷動作を行う。この繰り返しで製氷が行われる。 In the automatic ice making function, for example, it is determined that the ice making is completed after a lapse of a certain time after water supply. The ice making tray 10 is rotated by the ice making tray rotating motor 1 to execute an ice removing operation for separating the ice from the ice making tray 10. After that, the water supply pump motor 2 pumps up water and supplies it to the ice tray 10, and waits for a predetermined time until the water supply is frozen and ice making is completed. After the ice making is completed, the ice removing operation is performed again. Ice is made by repeating this process.

このように、本実施例の製氷皿回動用モータ１及び給水ポンプモータ２は同時動作することはなく、文脈からこれら２つを混同する虞が無いことから、製氷皿回動用モータ１及び給水ポンプモータ２を以後まとめてＩＭモータ１，２と呼ぶこととする。 As described above, the ice tray rotating motor 1 and the water supply pump motor 2 of the present embodiment do not operate at the same time, and there is no possibility of confusing these two from the context. The motor 2 will be collectively referred to as IM motors 1 and 2 hereinafter.

図３は、本実施例のＩＭモータ及び真空ポンプモータの第１動作タイムチャートである。本実施例では、真空ポンプモータ３動作中にＩＭモータ１，２の運転指示が出た場合、ＩＭモータ１，２動作を優先し真空ポンプモータ３を一時停止するようにしている。ＩＭモータ１，２の動作が完了したら、一時停止を解除して真空ポンプモータ３の動作を再開する。ＩＭモータ１，２は冷蔵庫のユーザが製氷皿１０の清掃に伴って動作させることがあるため、動作指令から時間を空けずに動作しないと故障との疑念を抱かせてしまう虞があるためである。 FIG. 3 is a first operation time chart of the IM motor and the vacuum pump motor of this embodiment. In the present embodiment, when the operation instruction of the IM motors 1 and 2 is issued during the operation of the vacuum pump motor 3, the operation of the IM motors 1 and 2 is prioritized and the vacuum pump motor 3 is temporarily stopped. When the operations of the IM motors 1 and 2 are completed, the temporary stop is released and the operation of the vacuum pump motor 3 is restarted. Since the IM motors 1 and 2 may be operated by the user of the refrigerator when the ice tray 10 is cleaned, there is a possibility that the IM motors 1 and 2 may be suspected of failure if they are not operated in a short time from the operation command. is there.

図４は、本実施例のＩＭモータ１，２及び真空ポンプモータ３の第２動作タイムチャートである。ＩＭモータ１，２動作中に真空ポンプモータ３の運転指示が出た場合、ＩＭモータ１，２の動作が優先されるから、真空ポンプモータ３は停止したままとなる。ＩＭモータ１，２の動作がそのまま継続され、動作完了後に真空ポンプモータ３の動作が開始する。 FIG. 4 is a second operation time chart of the IM motors 1 and 2 and the vacuum pump motor 3 of this embodiment. When the operation instruction of the vacuum pump motor 3 is issued during the operation of the IM motors 1 and 2, the operation of the IM motors 1 and 2 is prioritized, so that the vacuum pump motor 3 remains stopped. The operations of the IM motors 1 and 2 are continued as they are, and after the operation is completed, the operation of the vacuum pump motor 3 is started.

したがって、ＩＭモータ１，２と真空ポンプモータ３が同時に動作することはないので、モータ電流検出用回路を共用化しても各々のモータ電流の検出が可能である。本実施例によれば、製氷皿回動用モータ１のモータ電流値が上昇した場合は、製氷皿に氷が挟まるなどして製氷皿が回動できなくなったという異状を検知できる。給水ポンプモータ２の電流値が上昇した場合は、給水タンク２０の水がなくなった又は少なくなったという異状を検知できる。真空ポンプモータ３の電流値の変化によって真空貯蔵室内の圧力を検知できる。 Therefore, since the IM motors 1 and 2 and the vacuum pump motor 3 do not operate simultaneously, each motor current can be detected even if the motor current detection circuit is shared. According to the present embodiment, when the motor current value of the ice tray rotating motor 1 is increased, it is possible to detect the abnormal condition that the ice tray cannot be rotated because ice is caught in the ice tray. When the current value of the water supply pump motor 2 increases, it is possible to detect an abnormality that the water in the water supply tank 20 has run out or has run out. The pressure in the vacuum storage chamber can be detected by the change in the current value of the vacuum pump motor 3.

すなわち、ＩＭモータ１，２の電流上昇からはＩＭモータ１，２の異常を検知でき、真空ポンプモータ３の電流値変化からは真空ポンプモータ３への電流供給の必要性の有無を判断できる。 That is, the abnormality of the IM motors 1 and 2 can be detected from the current increase of the IM motors 1 and 2, and the necessity of the current supply to the vacuum pump motor 3 can be determined from the change of the current value of the vacuum pump motor 3.

なお、真空貯蔵室の減圧を或る程度行うことを優先させるべく、真空ポンプモータ３の電流値について閾値を設け、真空ポンプモータ３の運転指示が出た場合、閾値を過ぎるまでは真空ポンプモータ３の動作を優先させ、過ぎた後はＩＭモータ１，２の動作を優先させるようにしても良い。 A threshold value is set for the current value of the vacuum pump motor 3 in order to prioritize the decompression of the vacuum storage chamber to some extent, and when an operation instruction of the vacuum pump motor 3 is issued, the vacuum pump motor 3 is operated until the threshold value is exceeded. The operation of the IM motors 1 and 2 may be prioritized and the operation of the IM motors 1 and 2 may be prioritized after the operation.

本願は次の思想を包含する。
２つ又は３つ以上のモータと、
２つ以上の前記モータに運転電流を供給する又は運転電流の供給指令を出力するドライバと、
前記モータのいずれかに供給された運転電流を検知する運転検知部と、を有し、
前記モータのいずれか１つが運転している間、残りのモータは運転していない、複数のモータの異常検知装置。 This application includes the following ideas.
Two or more motors,
A driver that supplies an operating current to two or more of the motors or outputs an operating current supply command;
A driving detection unit that detects a driving current supplied to any of the motors,
An abnormality detection device for a plurality of motors, wherein while any one of the motors is operating, the remaining motors are not operating.

１ 製氷皿回動用モータ
２ 給水ポンプモータ
３ 真空ポンプモータ
４ 第１モータドライバＩＣ
５ 第２モータドライバＩＣ
６ シャント抵抗（運転検知部）
７ オペアンプ
８ 制御マイコン 1 Ice Plate Rotating Motor 2 Water Supply Pump Motor 3 Vacuum Pump Motor 4 First Motor Driver IC
5 Second motor driver IC
6 Shunt resistance (driving detector)
7 Operational amplifier 8 Control microcomputer

Claims (3)

製氷皿と、該製氷皿を回動させる製氷皿回動用モータと、
前記製氷皿に給水する給水ポンプと、該給水ポンプを駆動させる製氷皿給水用ポンプモータと、
前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータへの運転電流の供給又は運転電流の供給指令を、前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータのいずれか１つが運転している間、他方のモータを運転させないように出力する第１ドライバと、
前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータのいずれかに供給された運転電流を検知する、前記製氷皿回動用モータと前記製氷皿給水用ポンプモータとで共通の運転検知部と、を有する冷蔵庫。 An ice tray and an ice tray rotating motor for rotating the ice tray,
A water supply pump for supplying water to the ice tray, and an ice tray water supply pump motor for driving the water supply pump,
One of the ice tray rotation motor and the ice tray water supply pump motor operates to supply an operating current or an operating current supply command to the ice tray rotation motor and the ice tray water supply pump motor. A first driver that outputs so as not to operate the other motor while
An operation detection unit common to the ice tray rotation motor and the ice tray water supply pump motor, which detects an operating current supplied to one of the ice tray rotation motor and the ice tray water supply pump motor, Refrigerator with. 真空貯蔵室内を減圧する真空ポンプモータと、該真空ポンプモータに運転電流を供給する又は運転電流の供給指令を出力する第２ドライバと、を有し、
前記運転検知部は、前記真空ポンプモータに供給された運転電流も検知し、
前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータのいずれかの動作中、前記第２ドライバに運転電流の供給及び供給指令を許さず、
前記真空ポンプモータの動作中、前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータのいずれかの運転指令が出力された場合、前記真空ポンプモータの動作を一時停止させて前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータのいずれかを運転させる請求項１に記載の冷蔵庫。 A vacuum pump motor for reducing the pressure inside the vacuum storage chamber; and a second driver for supplying an operating current to the vacuum pump motor or outputting a command for supplying an operating current,
The operation detection unit also detects the operation current supplied to the vacuum pump motor,
During operation of either the ice tray rotating motor or the ice tray water supply pump motor, the second driver is not allowed to supply an operating current and supply command,
During operation of the vacuum pump motor, when an operation command for either the ice tray rotating motor or the ice tray water supply pump motor is output, the operation of the vacuum pump motor is temporarily stopped to rotate the ice tray. The refrigerator according to claim 1, wherein either the motor or the ice tray water supply pump motor is operated. 真空貯蔵室内を減圧する真空ポンプモータと、該真空ポンプモータに運転電流を供給する又は運転電流の供給指令を出力する第２ドライバと、を有し、
前記運転検知部は、前記真空ポンプモータに供給された運転電流も検知し、
前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータのいずれかの動作中、前記第２ドライバに運転電流の供給及び供給指令を前記真空ポンプモータ電流の閾値を過ぎた後は許さず、
前記真空ポンプモータの動作中、前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータのいずれかの運転指令が出力された場合、前記閾値を過ぎてから前記真空ポンプモータの動作を一時停止させて前記製氷皿回動用モータ及び前記製氷皿給水用ポンプモータのいずれかを運転させる請求項１に記載の冷蔵庫。 A vacuum pump motor for reducing the pressure inside the vacuum storage chamber; and a second driver for supplying an operating current to the vacuum pump motor or outputting a command for supplying an operating current,
The operation detection unit also detects the operation current supplied to the vacuum pump motor,
During operation of either the ice tray rotation motor or the ice tray water supply pump motor, the second driver is not allowed to supply an operation current and supply a command after the threshold value of the vacuum pump motor current,
During operation of the vacuum pump motor, when an operation command for either the ice tray rotation motor or the ice tray water supply pump motor is output, the operation of the vacuum pump motor is temporarily stopped after the threshold is exceeded. The refrigerator according to claim 1, wherein either the ice tray rotating motor or the ice tray water supply pump motor is operated.
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JP2001015247A (en) * 1999-07-01 2001-01-19 Matsushita Electric Ind Co Ltd Heater disconnection detecting method and its device
JP2006200781A (en) * 2005-01-19 2006-08-03 Matsushita Electric Ind Co Ltd Control device for refrigerator
JP2011043305A (en) * 2009-08-24 2011-03-03 Hitachi Appliances Inc Refrigerator
JP2011058685A (en) * 2009-09-09 2011-03-24 Hitachi Appliances Inc Refrigerator
JP2011220629A (en) * 2010-04-12 2011-11-04 Hitachi Appliances Inc Refrigerator including automatic ice making machine

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Publication number Priority date Publication date Assignee Title
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