JP2007330650A - Dishwasher - Google Patents

Dishwasher Download PDF

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JP2007330650A
JP2007330650A JP2006168389A JP2006168389A JP2007330650A JP 2007330650 A JP2007330650 A JP 2007330650A JP 2006168389 A JP2006168389 A JP 2006168389A JP 2006168389 A JP2006168389 A JP 2006168389A JP 2007330650 A JP2007330650 A JP 2007330650A
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water
cleaning
amount
speed rotation
pump
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JP4553871B2 (en
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Atsushi Takeda
竹田  淳
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Mitsubishi Electric Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher which causes no air trapping in a washing pump even if the quantity of washing water is small and can wash dishes by a high washing performance. <P>SOLUTION: The dishwasher has the washing pump 13 which absorbs and pressurizes washing water supplied to a washing tub 7, a washing nozzle 14 arranged in the washing tub 7 and rotating while jetting water in response to pressurization from the washing pump 13 and washing dishes in the washing tub 7, and a control means which rotates the washing pump 13 at high speed and then switches it to low speed, varies the quantity of washing water jet from the washing nozzle 14 by repeating the process, and switches it to low speed before the quantity of water used during the high speed rotation exceeds a prescribed quantity. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、家庭用もしくは業務用として皿などの食器や調理具を自動的に洗浄する食器洗浄機に関するものである。   The present invention relates to a dishwasher for automatically washing dishes such as dishes and cooking utensils for home use or business use.

従来の食器洗浄機として、ノズルから洗浄水を間欠的に噴射するものがある。間欠的に噴射される洗浄水は、食器に当たったときに衝撃力となり、食器に付着した汚れを容易に落とすことを可能にしている。(例えば、特許文献1参照)。   As a conventional tableware washing machine, there is one that jets washing water intermittently from a nozzle. The wash water sprayed intermittently becomes an impact force when it hits the tableware, and makes it possible to easily remove the dirt adhering to the tableware. (For example, refer to Patent Document 1).

特開2002−17646号公報(第1頁、図1)JP 2002-17646 A (first page, FIG. 1)

従来の食器洗浄機は、ノズルから間欠的に洗浄水を噴射するため、一様に洗浄水を噴射する場合と比べて、食器に付着した汚れに対し洗浄水が大きな衝撃力を発揮して洗浄力を向上させるものであるが、ノズルから噴射される洗浄水の量が多く、このため、洗浄ポンプがエア噛みを起こさないように大量の洗浄水を用意しなければならず、水道代などランニングコストが余計に掛かってしまうという課題があった。また、洗浄ポンプがエア噛みを起こすようなことがあった場合には、洗浄力が低下する上に、騒音が増加し、耐久性が低下するという課題があった。   The conventional dishwasher sprays wash water intermittently from the nozzle, so the wash water exerts a greater impact force on the dirt adhering to the tableware compared to the case where the wash water is sprayed uniformly. Although it improves the power, the amount of cleaning water sprayed from the nozzle is large. For this reason, a large amount of cleaning water must be prepared so that the cleaning pump does not clog the air, and running costs such as water bills There was a problem that the cost would be excessive. Further, when the cleaning pump sometimes causes air biting, there is a problem that the cleaning power is reduced, noise is increased, and durability is reduced.

本発明は、前記のような課題を解決するためになされたもので、洗浄水の量が少なくても、洗浄ポンプにエア噛みがなく、高い洗浄力で食器を洗浄できる食器洗浄機を提供することを目的とする。   The present invention has been made to solve the above-described problems, and provides a dishwasher that can clean dishes with a high cleaning power without having an air bit in a cleaning pump even when the amount of cleaning water is small. For the purpose.

本発明に係る食器洗浄機は、食器類を収納する洗浄槽と、洗浄槽内に供給された洗浄水を吸引して加圧する洗浄ポンプと、洗浄槽内に配設され、洗浄ポンプからの加圧に応じて水を噴射しながら回転し、洗浄槽内の食器類を洗浄する洗浄ノズルと、洗浄ポンプを高速回転と低速回転とを交互に繰り返し切り替えて、前記洗浄ノズルから噴射される洗浄水の噴射量を変化させ、高速回転時に使用される水量が所定量を超える前に低速回転に切り替える制御手段とを備えたものである。   A dishwasher according to the present invention includes a washing tank for storing dishes, a washing pump for sucking and pressurizing washing water supplied into the washing tank, and a washing pump disposed in the washing tank. Washing water sprayed from the washing nozzle by rotating while jetting water according to pressure and washing the dishes in the washing tank, and alternately switching the washing pump between high speed rotation and low speed rotation. And a control means for switching to low-speed rotation before the amount of water used during high-speed rotation exceeds a predetermined amount.

本発明においては、洗浄ポンプを高速回転と低速回転とを交互に繰り返し切り替えて、前記洗浄ノズルから噴射される洗浄水の噴射量を変化させ、高速回転時に使用される水量が所定量を超える前に低速回転に切り替えるようにしたので、洗浄ポンプにエア噛みを起こさせることなく、洗浄水を節水しながら、食器を高い洗浄力で洗浄することができる。   In the present invention, the cleaning pump is alternately switched between high-speed rotation and low-speed rotation to change the amount of cleaning water sprayed from the cleaning nozzle before the amount of water used during high-speed rotation exceeds a predetermined amount. Thus, the tableware can be washed with high washing power while saving washing water without causing the washing pump to chew air.

実施の形態1.
図1は本発明の実施の形態1に係る食器洗浄機を示す概略構成図、図2は高速回転時と低速回転時に洗浄に使用される水量の説明図、図3は洗浄ポンプの回転数と洗浄に使用される水量の相関を示す図、図4は洗浄ポンプの回転数の変化を示す図である。
食器洗浄機本体1に備えられたタンク2は、外部から水を引き込むための注水口3と排水口6とをそれぞれ有し、注水口3を通じて供水される水4の水位を検出する水位センサ5と貯水された水4を加熱するためのヒータ6とが配置されている。水位センサ5は、洗浄工程とすすぎ工程の各工程で必要な水量を検出するためのものである。タンク2の上方に設けられた洗浄槽7は、洗浄対象の食器を載せるための下かご8と上かご9が着脱可能に配置され、側面側には洗浄槽7内に供給された洗浄水(すすぎ水)の液面変化を検出するための反射型液面センサ10が取り付けられている。洗浄槽7内に給湯口12が設けられた管路上に給湯ポンプ11が設置されている。この給湯ポンプ11は、洗浄工程とすすぎ工程の各工程において制御部20により駆動制御され、前記のヒータ20は、制御部20の通電制御により、タンク2内の水4が例えば60℃になるように加熱する。ヒータ2への通電制御は、すすぎが終了するまで行われている。
Embodiment 1 FIG.
FIG. 1 is a schematic configuration diagram showing a dishwasher according to Embodiment 1 of the present invention, FIG. 2 is an explanatory diagram of the amount of water used for washing at high speed rotation and low speed rotation, and FIG. FIG. 4 is a diagram showing the correlation of the amount of water used for cleaning, and FIG. 4 is a diagram showing changes in the number of rotations of the cleaning pump.
The tank 2 provided in the dishwasher main body 1 has a water inlet 3 and a water outlet 6 for drawing water from the outside, respectively, and a water level sensor 5 for detecting the water level of the water 4 supplied through the water inlet 3. And a heater 6 for heating the stored water 4 are disposed. The water level sensor 5 is for detecting the amount of water required in each of the cleaning process and the rinsing process. The washing tank 7 provided above the tank 2 is provided with a lower basket 8 and an upper basket 9 for detaching the tableware to be washed, and the washing water supplied into the washing tank 7 on the side surface ( A reflective liquid level sensor 10 for detecting a change in the liquid level of the rinse water is attached. A hot water supply pump 11 is installed on a pipe line provided with a hot water supply port 12 in the washing tank 7. The hot water supply pump 11 is driven and controlled by the control unit 20 in each of the cleaning process and the rinsing process, and the heater 20 is configured so that the water 4 in the tank 2 becomes, for example, 60 ° C. by the energization control of the control unit 20. Heat to. The energization control to the heater 2 is performed until rinsing is completed.

洗浄ポンプ13は、ケーシング部13a(羽根内蔵)とモータ13bとからなり、洗浄槽7内に供給された洗浄水(すすぎ水)を吸引して加圧し、洗浄ノズル14へ吐出する。この洗浄ノズル14は、洗浄ポンプ13のケーシング部13a側に回動自在に取り付けられ、洗浄ポンプ13からの水量に応じて複数の噴射口14aから洗浄水(すすぎ水)を噴射しながら一方向に回転する。この回転は、複数の噴射口14aから噴射される洗浄水の噴射力の反力による。洗浄槽7の底部側に洗浄槽7内の汚水を排水口16から排水する排水ポンプ15が設置されている。洗浄槽7と洗浄ポンプ13とを連結する管路の上流側にフィルタ17が着脱可能に取り付けられている。このフィルタ17により、洗浄時に食器から落ちた残菜が収集される。排水ポンプ15は、食器の洗浄とすすぎが終了する毎に、制御部20によって駆動制御され、前述した洗浄ポンプ13は、洗浄工程およびすすぎ工程の各工程において、制御部20により駆動制御される。   The cleaning pump 13 includes a casing portion 13 a (with built-in blades) and a motor 13 b. The cleaning pump 13 sucks and pressurizes cleaning water (rinsing water) supplied into the cleaning tank 7 and discharges it to the cleaning nozzle 14. This cleaning nozzle 14 is rotatably attached to the casing 13a side of the cleaning pump 13, and in one direction while injecting cleaning water (rinse water) from a plurality of injection ports 14a according to the amount of water from the cleaning pump 13. Rotate. This rotation is caused by the reaction force of the washing water jetting force jetted from the plurality of jetting ports 14a. A drainage pump 15 for draining sewage in the cleaning tank 7 from the drain port 16 is installed on the bottom side of the cleaning tank 7. A filter 17 is detachably attached to an upstream side of a pipe line connecting the cleaning tank 7 and the cleaning pump 13. The filter 17 collects leftovers that have fallen from the tableware during washing. The drain pump 15 is driven and controlled by the control unit 20 every time cleaning and rinsing of the tableware is completed, and the above-described cleaning pump 13 is driven and controlled by the control unit 20 in each of the cleaning process and the rinsing process.

ここで、制御部20による洗浄ポンプ13の駆動制御について説明する。まず、図2を用いて洗浄ポンプ13の回転数と洗浄(すすぎ)に使用される水量との関係を説明する。洗浄ポンプ13を高速回転数A1で回転させた場合、洗浄(すすぎ)で使用される水量、即ち、洗浄ノズル14から噴射された洗浄水(すすぎ水)が洗浄槽7の底部に回収されていない水量(使用水量)が時間の経過と共に増えて第1の使用水量L1に近づき、この状態から低速回転数A2に切り替えた場合は、使用水量が徐々に減少して第2の使用水量L2に近づいていく。このように、使用水量は、高速回転時に多くなり、低速回転時に減少する。第1の使用水量L1は、高速回転時の使用水量の上限値であり、第2の使用水量L2は、低速回転時の使用水量の上限値であり、これらは、予め測定して得られた使用水量である。   Here, drive control of the cleaning pump 13 by the control unit 20 will be described. First, the relationship between the rotation speed of the cleaning pump 13 and the amount of water used for cleaning (rinsing) will be described with reference to FIG. When the cleaning pump 13 is rotated at a high rotational speed A1, the amount of water used for cleaning (rinsing), that is, the cleaning water sprayed from the cleaning nozzle 14 (rinsing water) is not collected at the bottom of the cleaning tank 7. When the amount of water (amount of water used) increases with time and approaches the first amount of water used L1, and when switching from this state to the low speed rotation speed A2, the amount of water used decreases gradually and approaches the second amount of water used L2. To go. Thus, the amount of water used increases during high-speed rotation and decreases during low-speed rotation. The first used water amount L1 is the upper limit value of the used water amount at the time of high speed rotation, and the second used water amount L2 is the upper limit value of the used water amount at the time of low speed rotation, and these were obtained by measuring in advance. The amount of water used.

実施の形態1においては、洗浄ポンプ13の高速回転時の洗浄水(すすぎ水)の使用水量(洗浄槽7の底部に回収されていない水量)が少なくなるようにしている。例えば図3に示すように、洗浄ポンプ13を高速回転数A1で回転させたときの使用水量が第1の使用水量L1(上限使用水量)よりも少ない所定量Lに達したとき、洗浄ポンプ13の回転数を高速回転数A1から低速回転数A2に切り替える。低速回転時の使用水量が所定量Lから例えば一定量まで減少したときに、再び高速回転数A1に切り替え、これを繰り返し行う。この場合、図4に示すように、洗浄ポンプ13の回転数がパルス状に変化する。使用水量が所定量Lに達したか否かの判定、また、使用水量が所定量Lから一定量まで減少したか否かの判定は、洗浄槽7内に設けられた反射型液面センサ10の液面検出に基づいて行っている。   In the first embodiment, the amount of water used for the cleaning water (rinse water) when the cleaning pump 13 rotates at high speed (the amount of water not recovered at the bottom of the cleaning tank 7) is reduced. For example, as shown in FIG. 3, when the amount of water used when the cleaning pump 13 is rotated at the high speed A1 reaches a predetermined amount L that is smaller than the first amount of water L1 (upper limit amount of water used), the cleaning pump 13 Is switched from the high speed A1 to the low speed A2. When the amount of water used at the time of low-speed rotation decreases from a predetermined amount L to, for example, a certain amount, it is switched again to the high-speed rotation number A1, and this is repeated. In this case, as shown in FIG. 4, the rotation speed of the cleaning pump 13 changes in a pulse shape. The determination as to whether or not the amount of water used has reached a predetermined amount L and the determination as to whether or not the amount of water used has decreased from the predetermined amount L to a certain amount are made according to the reflective liquid level sensor 10 provided in the cleaning tank 7. This is based on the liquid level detection.

次に、前記のように構成された食器洗浄機の動作を図1、図3及び図4を参照しながら説明する。
タンク2に設置された水位センサ5が水4を検出すると、制御部20は、水位センサ5の高さまで水4が給水されたと判断して、給水を停止させる旨を例えば音で報知し、洗浄工程に入る。まず、ヒータ5に通電してタンク2内の水4を加熱し、その水温が例えば60℃まで上昇したときに給湯ポンプ11を駆動し、タンク2内の温水4を洗浄槽7内に給湯する。この時、予め定められた洗浄に必要な総水量が供給されたか否かを反射型液面センサ10を通して判定し、また、タンク2の水温が60℃に保たれるようにヒータ5への通電を制御する。なお、ヒータ5への通電制御は、前述したようにすすぎが終了するまで行われている。
Next, the operation of the dishwasher configured as described above will be described with reference to FIGS.
When the water level sensor 5 installed in the tank 2 detects the water 4, the control unit 20 determines that the water 4 has been supplied up to the height of the water level sensor 5, and notifies, for example, by sound that the water supply is stopped and washed. Enter the process. First, the heater 5 is energized to heat the water 4 in the tank 2, and when the water temperature rises to, for example, 60 ° C., the hot water supply pump 11 is driven to supply the hot water 4 in the tank 2 into the washing tank 7. . At this time, it is determined through the reflective liquid level sensor 10 whether or not a predetermined total amount of water necessary for cleaning is supplied, and the heater 5 is energized so that the water temperature of the tank 2 is maintained at 60 ° C. To control. In addition, the energization control to the heater 5 is performed until rinsing is completed as described above.

制御部20は、反射型液面センサ10を通して、洗浄に必要な総水量が洗浄槽7内に供給されたことを検知すると、給湯ポンプ11の駆動を停止し、次いで、洗浄ポンプ13を高速回転数A1で回転させ、洗浄ノズル14から洗浄水を噴射させる。この時、洗浄槽7の底部に回収されていない使用水量が所定量Lに達したか否かを反射型液面センサ10の液面検出に基づいて判定する。図3に示すように使用水量が所定量Lに達したときは、洗浄ポンプ13の回転数を高速回転数A1から低速回転数A2に切り替え、高速回転時の噴射量より少ない洗浄水を洗浄ノズル14から噴射させる。この時、使用水量が所定量Lから一定量まで減少したか否かを反射型液面センサ10の液面検出に基づいて判定し、同図3に示すように使用水量が一定量まで減少したときは、洗浄ポンプ13の回転数を再び高速回転数A1に切り替え、前述した動作を繰り返す。この場合、前述したように洗浄ポンプ13の回転数がパルス的に変化する(図4参照)。   When the control unit 20 detects that the total amount of water necessary for cleaning is supplied into the cleaning tank 7 through the reflective liquid level sensor 10, the control unit 20 stops driving the hot water supply pump 11, and then rotates the cleaning pump 13 at high speed. The cleaning water is jetted from the cleaning nozzle 14 by rotating at a number A1. At this time, it is determined based on the liquid level detection of the reflective liquid level sensor 10 whether or not the amount of water used that has not been collected at the bottom of the cleaning tank 7 has reached a predetermined amount L. As shown in FIG. 3, when the amount of water used reaches a predetermined amount L, the rotation speed of the cleaning pump 13 is switched from the high-speed rotation speed A1 to the low-speed rotation speed A2, and the cleaning nozzle has less cleaning water than the injection amount during high-speed rotation. 14 is injected. At this time, it is determined whether or not the amount of water used has decreased from the predetermined amount L to a certain amount based on the liquid level detection of the reflective liquid level sensor 10, and the amount of water used has decreased to a certain amount as shown in FIG. At that time, the rotational speed of the cleaning pump 13 is switched again to the high speed rotational speed A1, and the above-described operation is repeated. In this case, as described above, the rotation speed of the cleaning pump 13 changes in a pulse manner (see FIG. 4).

一方、洗浄ノズル14は、洗浄ポンプ13が高速回転数A1で回転しているとき、上かご9の食器に洗浄水を当てながら回転し、洗浄ポンプ13が低速回転数A2で回転しているときは、下かご8の食器に洗浄水を当てながら回転する。この場合、洗浄ポンプ13が高速回転数A1と低速回転数A2を一周期として回転したとき、洗浄ノズル14が一回転しないので、洗浄ノズル14から噴射される洗浄水の噴射タイミングがずれていく。   On the other hand, when the cleaning pump 13 rotates at the high speed rotation number A1, the cleaning nozzle 14 rotates while applying cleaning water to the tableware of the upper basket 9, and when the cleaning pump 13 rotates at the low speed rotation number A2. Rotates while applying washing water to the tableware in the lower basket 8. In this case, when the cleaning pump 13 rotates with the high speed rotation speed A1 and the low speed rotation speed A2 as one cycle, since the cleaning nozzle 14 does not rotate once, the injection timing of the cleaning water injected from the cleaning nozzle 14 shifts.

食器の洗浄時間が経過すると、洗浄ポンプ13の駆動を停止し、次いで、排水ポンプ15を駆動して、洗浄槽7内の汚水を排水口16から外部へ排水させ、洗浄工程を終了する。その後、再び給湯ポンプ11を駆動してすすぎ工程に入る。なお、すすぎ工程における給湯ポンプ11の駆動制御、洗浄ポンプ13の駆動制御、及び排水ポンプ15の駆動制御については、前述した洗浄工程とほぼ同じであるため、動作説明を割愛する。   When the cleaning time of the dishes has elapsed, the driving of the cleaning pump 13 is stopped, and then the drainage pump 15 is driven to drain the sewage in the cleaning tank 7 from the drainage port 16 to the outside, and the cleaning process is completed. Thereafter, the hot water supply pump 11 is driven again and the rinsing process is started. Note that the drive control of the hot water supply pump 11, the drive control of the cleaning pump 13, and the drive control of the drainage pump 15 in the rinsing process are substantially the same as in the above-described cleaning process, and thus the description of the operation is omitted.

以上のように実施の形態1によれば、洗浄工程とすすぎ工程の各工程において、洗浄ポンプ13を高速回転数A1で回転させ、この時の洗浄水(すすぎ水)の使用水量が第1の使用水量L1より少ない所定量Lに達したとき、洗浄ポンプ13の回転数を高速回転数A1から低速回転数A2に切り替え、低速回転時の洗浄水(すすぎ水)の使用水量が所定量Lから一定量まで減少したときは、洗浄ポンプ13の回転数を低速回転数A2から高速回転数A1に切り替えて、これを繰り返すようにしたので、洗浄水(すすぎ水)を節水しながら、食器を高い洗浄力で洗浄することができる。   As described above, according to the first embodiment, in each of the cleaning process and the rinsing process, the cleaning pump 13 is rotated at the high speed rotation number A1, and the amount of water used for the cleaning water (rinsing water) at this time is the first. When the predetermined amount L smaller than the used water amount L1 is reached, the rotation speed of the cleaning pump 13 is switched from the high speed rotation number A1 to the low speed rotation number A2, and the use amount of the cleaning water (rinse water) at the low speed rotation is changed from the predetermined amount L. When it decreased to a certain amount, the rotation speed of the cleaning pump 13 was switched from the low-speed rotation speed A2 to the high-speed rotation speed A1, and this was repeated, so the tableware was made high while saving washing water (rinsing water). It can be washed with detergency.

なお、前記の実施の形態1では、洗浄ポンプ13の高速回転時の使用水量が所定量Lに達したときに、回転数を高速回転数A1から低速回転数A2に切り替え、低速回転時の使用水量が所定量Lから一定量まで減少したときに、回転数を低速回転数A2から高速回転数A1に切り替えるようにしたが、洗浄ポンプ13の高速回転時の使用水量が所定量Lに達したときの時間を予め測定しておき、また、低速回転時の使用水量が所定量Lから一定量まで減少したときの時間を予め測定しておき、これら時間を基に洗浄ポンプ13の回転数A1、A2の切り替えを行うようにしても良い。   In the first embodiment, when the amount of water used at the time of high speed rotation of the cleaning pump 13 reaches the predetermined amount L, the rotation speed is switched from the high speed rotation speed A1 to the low speed rotation speed A2, and used at the low speed rotation. When the amount of water decreased from the predetermined amount L to a certain amount, the rotational speed was switched from the low speed rotational speed A2 to the high speed rotational speed A1, but the amount of water used during the high speed rotation of the cleaning pump 13 reached the predetermined amount L. Time is measured in advance, and the time when the amount of water used during low-speed rotation is reduced from a predetermined amount L to a predetermined amount is measured in advance, and the rotational speed A1 of the cleaning pump 13 is based on these times. , A2 may be switched.

例えば、図5に示すように、洗浄ポンプ13を高速回転数A1で回転させ、高速回転を開始してから時間T1を経過したとき、高速回転時の使用水量が所定量Lに達したと判断して、回転数を低速回転数A2に切り替え、低速回転に切り替えてから時間T2を経過したときは、低速回転時の使用水量が所定量Lから一定量まで減少したと判断して、再び高速回転数A1に切り替え、時間T1、T2を一周期として繰り返し行う。なお、高速回転時の時間T1は、低速回転時の時間T2よりも短くなっている。この場合も、前記と同様に洗浄水(すすぎ水)を節水しながら、食器を高い洗浄力で洗浄することができる。   For example, as shown in FIG. 5, when the time T1 has elapsed since the cleaning pump 13 is rotated at the high speed rotation number A1 and the high speed rotation is started, it is determined that the amount of water used during the high speed rotation has reached a predetermined amount L. Then, when the rotational speed is switched to the low speed rotational speed A2 and the time T2 has elapsed since the switching to the low speed rotational speed, it is determined that the amount of water used at the low speed rotational speed has decreased from the predetermined amount L to a constant amount, and the high speed is again reached. It switches to rotation speed A1, and repeats it by making time T1 and T2 into one period. Note that the time T1 during high-speed rotation is shorter than the time T2 during low-speed rotation. In this case as well, the tableware can be washed with high detergency while saving washing water (rinse water).

また、実施の形態1では、洗浄ポンプ13を高速回転数A1で回転させ、その後、回転数を低速回転数A2に切り替えて、これを繰り返すようにしたが、まず、低速回転数A2で洗浄ポンプ13を回転させ、その後、回転数を低速回転数A2から高速回転数A1に切り替えて、これを繰り返し行うようにしても良い。   In the first embodiment, the cleaning pump 13 is rotated at the high speed rotation speed A1, and then the rotation speed is switched to the low speed rotation speed A2, and this is repeated. First, the cleaning pump is rotated at the low speed rotation speed A2. 13 may be rotated, and then the rotational speed may be switched from the low speed rotational speed A2 to the high speed rotational speed A1, and this may be repeated.

実施の形態2.
実施の形態1では、洗浄ポンプ13の高速回転時の使用水量の上限である第1の使用水量L1、低速回転時の使用水量の上限である第2の使用水量L2、及び所定量Lについては、予め測定された値を用いるようにしたが、実施の形態2は、予め定められた高速回転数と低速回転数とから自動的に第1及び第2の使用水量L1、L2を算出し、この得られたL1とL2に基づいて所定量Lを求めるようにしたものであり、以下、実施の形態2の食器洗浄機について、具体的に説明をする。なお、本実施の形態2は、制御部20を除いて実施の形態1とほぼ同じであるため、図1を用いて説明をする。
Embodiment 2. FIG.
In the first embodiment, the first used water amount L1 that is the upper limit of the used water amount at the time of high speed rotation of the cleaning pump 13, the second used water amount L2 that is the upper limit of the used water amount at the time of low speed rotation, and the predetermined amount L. In the second embodiment, the first and second water usage amounts L1 and L2 are automatically calculated from the predetermined high speed and low speed, and the values measured in advance are used. The predetermined amount L is obtained based on the obtained L1 and L2, and the dishwasher of the second embodiment will be specifically described below. The second embodiment is substantially the same as the first embodiment except for the control unit 20, and will be described with reference to FIG.

実施の形態2の食器洗浄機本体1には、例えば、食器の汚れ度合いに応じて標準洗浄、或いは強力洗浄の何れか一方を選択させるためのスイッチ(図示せず)が設けられている。前記の制御部20は、標準洗浄に対応して洗浄ポンプ13の回転数A1、A2が、強力洗浄に対応して回転数A11、A21がデータとして設定されている。A1とA21は高速回転数で、A1<A21の関係になっている。また、A2とA21は低速回転数で、A2<A21の関係になっている。標準洗浄、或いは強力洗浄の何れか一方が選択されたときは、下記に示す式を用いて、それぞれ第1の使用水量L1(上限使用水量)と第2の使用水量L2を算出する。
L1 = W1/μ …(1)
L2 = W2/μ …(2)
The dishwasher main body 1 according to the second embodiment is provided with a switch (not shown) for selecting either standard washing or strong washing according to the degree of contamination of the dishes, for example. In the control unit 20, the rotation speeds A1 and A2 of the cleaning pump 13 are set as data corresponding to the standard cleaning, and the rotation speeds A11 and A21 are set as data corresponding to the strong cleaning. A1 and A21 are high-speed rotation speeds and have a relationship of A1 <A21. Moreover, A2 and A21 are low speed rotation speeds, and have a relationship of A2 <A21. When either standard cleaning or strong cleaning is selected, the first use water amount L1 (upper limit use water amount) and the second use water amount L2 are calculated using the following equations.
L1 = W1 / μ… (1)
L2 = W2 / μ… (2)

式(1) 中のW1は、洗浄ポンプ13を高速回転させたときの洗浄ノズル14から噴射される単位時間当たりの噴射水量で、高速回転数A1のときの噴射水量と高速回転数A11のときの噴射水量とがある。式(2) 中のW2は、洗浄ポンプ13を低速回転させたときの洗浄ノズル14から噴射される単位時間当たりの噴射水量で、低速回転数A2のときの噴射水量と低速回転数A21のときの噴射水量とがある。これら噴射水量は、予め実験によって測定されたもので、データとして制御部20に設定されている。また、μは、噴射された洗浄水が単位時間当たりに洗浄槽7の底部に回収される割合を示す回収率で、前記と同様にデータとして制御部20に設定されている。   W1 in the formula (1) is the amount of water sprayed from the cleaning nozzle 14 when the cleaning pump 13 is rotated at a high speed, and is the amount of water jetted at the high speed rotation speed A1 and the high speed rotation speed A11. There is a jet water amount. W2 in the formula (2) is the amount of water sprayed from the cleaning nozzle 14 when the cleaning pump 13 is rotated at a low speed, and is the amount of water jetted at the low speed A2 and the low speed A21. There is a jet water amount. These jet water amounts are previously measured by experiments and are set in the control unit 20 as data. Further, μ is a recovery rate indicating the rate at which the sprayed cleaning water is recovered at the bottom of the cleaning tank 7 per unit time, and is set in the control unit 20 as data as described above.

また、制御部20は、前記式から得た第1の使用水量L1と第2の使用水量L2の中間値を算出する。この中間値は、洗浄ポンプ13を高速回転から低速回転に切り替えるときの所定量Lである。低速回転A21から高速回転A11に切り替えるときの一定量は、実施の形態1と同じ値である。なお、前記式によって得られた第1の使用水量L1は、高速回転数A1ときよりもA11の方が多くなり、第2の使用水量L2は、低速回転数A2のときよりもA21の方が多くなっている。   Further, the control unit 20 calculates an intermediate value between the first used water amount L1 and the second used water amount L2 obtained from the above formula. This intermediate value is a predetermined amount L when the cleaning pump 13 is switched from high speed rotation to low speed rotation. A certain amount when switching from the low speed rotation A21 to the high speed rotation A11 is the same value as in the first embodiment. The first used water amount L1 obtained by the above formula is larger at A11 than at the high speed rotation number A1, and the second used water amount L2 is greater at A21 than at the low speed rotation number A2. It is increasing.

実施の形態2においては、標準洗浄、或いは強力洗浄の何れかをスイッチで選択すると、制御部20は、洗浄工程に入ってタンク2内の温水(60℃)4を給湯ポンプ11を介して洗浄槽7内に供給し、スイッチの選択に基づいて第1及び第2の使用水量L1、L2の算出に入る。その選択が強力洗浄のときは、高速回転数A11のときの噴射水量W1と回収率μを式(1) に当てはめて第1の使用水量L1を算出し、次いで、低速回転数A21のときの噴射水量W2と回収率μを式(2) に当てはめて第2の使用水量L2を算出し、これら演算によって得られたL1とL2に基づいて所定量Lを求める。   In the second embodiment, when either standard cleaning or strong cleaning is selected with a switch, the control unit 20 enters the cleaning process and cleans the hot water (60 ° C.) 4 in the tank 2 via the hot water supply pump 11. The water is supplied into the tank 7 and calculation of the first and second water usage amounts L1 and L2 starts based on the selection of the switch. When the selection is strong cleaning, the first use water amount L1 is calculated by applying the jet water amount W1 and the recovery rate μ at the high speed rotation speed A11 to the equation (1), and then at the low speed rotation speed A21. The second water usage amount L2 is calculated by applying the jet water amount W2 and the recovery rate μ to the equation (2), and the predetermined amount L is obtained based on L1 and L2 obtained by these calculations.

そして、洗浄ポンプ13を高速回転数A11で回転させ、この時の使用水量が演算した所定量Lに達したときに、洗浄ポンプ13の回転数を高速回転数A11から低速回転数A21に切り替え、低速回転時の使用水量が所定量Lから一定量まで減少したときは、洗浄ポンプ13の回転数を低速回転数A21から高速回転数A11に切り替え、これを繰り返し行う。この場合、洗浄ノズル14から噴射される高速回転時と低速回転時の噴射量は、前述したように洗浄ポンプ13を回転数A1、A2で回転させたときよりも多くなっている。つまり、回転数A1、A2のときよりも強い噴射力で食器を洗浄することになる。   Then, the cleaning pump 13 is rotated at the high speed rotation speed A11, and when the amount of water used at this time reaches the calculated predetermined amount L, the rotation speed of the cleaning pump 13 is switched from the high speed rotation speed A11 to the low speed rotation speed A21. When the amount of water used during low-speed rotation decreases from the predetermined amount L to a constant amount, the rotation speed of the cleaning pump 13 is switched from the low-speed rotation speed A21 to the high-speed rotation speed A11, and this is repeated. In this case, the injection amount at the high speed rotation and the low speed rotation injected from the cleaning nozzle 14 is larger than that when the cleaning pump 13 is rotated at the rotation speeds A1 and A2, as described above. That is, the dishes are washed with a stronger jetting force than at the rotation speeds A1 and A2.

なお、すすぎ工程における洗浄ポンプ13の制御は、前述した洗浄工程のときと同じように、洗浄ポンプ13を高速回転数A11で回転させ、この時の使用水量が演算した所定量Lに達したときに、洗浄ポンプ13の回転数を高速回転数A11から低速回転数A21に切り替え、低速回転時の使用水量が所定量Lから一定量まで減少したときは、洗浄ポンプ13の回転数を低速回転数A21から高速回転数A11に切り替え、これを繰り返し行う。   The control of the cleaning pump 13 in the rinsing process is performed when the cleaning pump 13 is rotated at the high speed rotation speed A11 and the amount of water used at this time reaches the calculated predetermined amount L, as in the cleaning process described above. In addition, when the rotation speed of the cleaning pump 13 is switched from the high speed rotation speed A11 to the low speed rotation speed A21 and the amount of water used during the low speed rotation decreases from a predetermined amount L to a certain amount, the rotation speed of the cleaning pump 13 is changed to the low speed rotation speed. Switching from A21 to the high speed A11 is repeated.

以上のように実施の形態2においては、選択された洗浄ポンプ13の回転数(高速と低速)から自動的に第1及び第2の使用水量L1、L2を算出し、得られたL1とL2を用いて洗浄ポンプ13を高速回転から低速回転に切り替えるための所定量Lを算出できるようにしたので、洗浄ポンプ13を様々な高速回転と低速回転で回転させることが可能になり、このため、食器に付着した頑固な汚れや、多量の油などを容易に洗浄することが可能になり、洗浄力が向上するという効果がある。   As described above, in the second embodiment, the first and second water usage amounts L1 and L2 are automatically calculated from the selected rotation speed (high speed and low speed) of the cleaning pump 13, and the obtained L1 and L2 are obtained. Since the predetermined amount L for switching the cleaning pump 13 from the high speed rotation to the low speed rotation can be calculated using this, the cleaning pump 13 can be rotated at various high speed rotations and low speed rotations. It is possible to easily wash stubborn dirt adhering to the tableware, a large amount of oil, etc., and there is an effect that the cleaning power is improved.

なお、前記の実施の形態2では、洗浄工程とすすぎ工程での洗浄ポンプ13の制御を同じようにしたが、洗浄工程とすすぎ工程で異なる回転数で回転させるようにしても良い。   In the second embodiment, the control of the cleaning pump 13 in the cleaning process and the rinsing process is the same. However, the cleaning pump and the rinsing process may be rotated at different rotational speeds.

実施の形態3.
実施の形態3は、予め洗浄ポンプ13の高速回転時の時間と低速回転時の時間が決められていたときに、洗浄工程とすすぎ工程でそれぞれ必要な総水量を、洗浄ポンプ13がエア噛みを起こさない範囲で、できるだけ少なくなるように設定したものであり、以下、本実施の形態3の食器洗浄機について説明をする。なお、本実施の形態3は、制御部20を除いて実施の形態1とほぼ同じであるため、図1を用いて説明をする。
Embodiment 3 FIG.
In the third embodiment, when the time for high-speed rotation and the time for low-speed rotation of the cleaning pump 13 have been determined in advance, the cleaning pump 13 is configured to air-engage the total amount of water required for the cleaning process and the rinsing process. The dishwasher according to the third embodiment will be described below. The third embodiment is substantially the same as the first embodiment except for the control unit 20, and will be described with reference to FIG.

実施の形態3における制御部20には、洗浄ポンプ13を高速回転数A1で回転させる時間T1と低速回転数A2で回転させる時間T2が設定され、また、洗浄工程とすすぎ工程でそれぞれ必要な総水量Sを算出するための式(3)が設定されている。
S = Xm + W1/μ - (exp{μT2} - 1)(W1 - W2)/μ(exp{μ(T1 + T1)} - 1) …(3)
式中のXmは、洗浄ポンプ13を回転させたとき、洗浄ポンプ13がエア噛みを起こさないぎりぎりの水量で、予め実験によって得られた値である。S は、時間T1の間、高速回転数A1で、時間T2の間、低速回転数A2で交互に切り替えて回転させたときに必要な最小限の洗浄槽7内の総水量である。W1は、洗浄ポンプ13を高速回転数A1で回転させたときの洗浄ノズル14から噴射される単位時間当たりの噴射水量、W2は、洗浄ポンプ13を低速回転数A2で回転させたときの洗浄ノズル14から噴射される単位時間当たりの噴射水量、また、μは、噴射された洗浄水が単位時間当たりに洗浄槽7の底部に回収される割合を示す回収率である。
In the control unit 20 in the third embodiment, a time T1 for rotating the cleaning pump 13 at the high speed A1 and a time T2 for rotating the cleaning pump 13 at the low speed A2 are set, and the total required for each of the cleaning process and the rinsing process is set. Formula (3) for calculating the amount of water S is set.
S = Xm + W1 / μ-(exp {μT2}-1) (W1-W2) / μ (exp {μ (T1 + T1)}-1)… (3)
Xm in the equation is the value of the amount of water that does not cause the air to be caught by the cleaning pump 13 when the cleaning pump 13 is rotated, and is a value obtained by experiments in advance. S is the minimum amount of water in the washing tank 7 that is necessary when the rotation is alternately switched at the high speed A1 during the time T1 and at the low speed A2 during the time T2. W1 is the amount of water sprayed from the cleaning nozzle 14 when the cleaning pump 13 is rotated at the high speed A1, and W2 is the cleaning nozzle when the cleaning pump 13 is rotated at the low speed A2. The amount of water jetted per unit time from 14 and μ is a recovery rate indicating the rate at which the jetted wash water is recovered at the bottom of the cleaning tank 7 per unit time.

次に、動作を図5を用いて説明する。なお、図5は実施の形態3における洗浄ポンプの回転数の変化を示す図である。
制御部20は、洗浄工程とすすぎ工程の各工程に入る度に前記の式を用いて、洗浄槽7に供給する最小限の総水量Sを算出する。そして、給湯ポンプ11を駆動し、反射型液面センサ10の液面検出に基づいて総水量Sに達したか否かを判定する。洗浄槽7内の洗浄水が総水量Sに達したときは、給湯ポンプ11の駆動を停止して、洗浄ポンプ13を駆動する。図5に示すように、時間T1の間、高速回転数A1で回転させ、その後、時間T2の間、低速回転数A2で回転させ、これを周期Tとして繰り返し行う。
Next, the operation will be described with reference to FIG. In addition, FIG. 5 is a figure which shows the change of the rotation speed of the washing pump in Embodiment 3. In FIG.
The control unit 20 calculates the minimum total amount of water S to be supplied to the cleaning tank 7 by using the above formula every time the cleaning process and the rinsing process are entered. Then, the hot water supply pump 11 is driven to determine whether or not the total water amount S has been reached based on the liquid level detection of the reflective liquid level sensor 10. When the cleaning water in the cleaning tank 7 reaches the total water amount S, the hot water supply pump 11 is stopped and the cleaning pump 13 is driven. As shown in FIG. 5, during the time T1, the rotation is performed at the high speed A1, and then during the time T2, the rotation is performed at the low speed A2.

以上のように実施の形態3によれば、高速回転時の時間T1と低速回転時の時間T2とが与えられたときに、洗浄ポンプ13にエア噛みが生じない必要最小限の水量(総水量S)で食器を洗浄したり、すすぎしたるすることができるので、節水効果がある。   As described above, according to the third embodiment, when the time T1 at the time of high speed rotation and the time T2 at the time of low speed rotation are given, the minimum required water amount (total water amount) in which the air is not caught in the cleaning pump 13 is given. Since the dishes can be washed or rinsed in S), there is a water saving effect.

実施の形態4.
実施の形態1乃至3では、洗浄ポンプ13の高速回転時の使用水量の上限である第1の使用水量L1と低速回転時の使用水量の上限である第2の使用水量L2は、洗浄ポンプ13の回転数が決まると固定されていたが、実施の形態3は、下かご8と上かご9に載置された食器の種類や数によって洗浄槽7の底部に回収される水量に応じて、第1及び第2の使用水量L1、L2と所定量Lとを変更するようにしたものである。この機能は、予備洗浄として、洗浄工程の前に実行されるようになっており、以下、実施の形態4の食器洗浄機について説明をする。なお、実施の形態4は、制御部20を除いて実施の形態1とほぼ同じであるため、図1を用いて説明する。
Embodiment 4 FIG.
In the first to third embodiments, the first used water amount L1 that is the upper limit of the used water amount at the time of high speed rotation of the cleaning pump 13 and the second used water amount L2 that is the upper limit of the used water amount at the time of low speed rotation are the cleaning pump 13. However, according to the amount of water collected at the bottom of the washing tub 7 according to the type and number of tableware placed in the lower basket 8 and the upper basket 9, The first and second water usage amounts L1, L2 and the predetermined amount L are changed. This function is executed as a preliminary cleaning before the cleaning step, and the dishwasher of the fourth embodiment will be described below. The fourth embodiment is substantially the same as the first embodiment except for the control unit 20, and will be described with reference to FIG.

実施の形態4における制御部20は、例えば、食器洗浄の開始スイッチ(図示せず)のオン操作を検知した後に、予備洗浄を促すスイッチのオン操作を検知したとき、第1及び第2の使用水量L1、L2と所定量Lとを得るための動作に入る。タンク2内に水4が供給されると、給湯ポンプ11を駆動してタンク2内の水4を洗浄槽7内に供給し、反射型液面センサ10の液面検出を通して、洗浄槽7内の水4が予備洗浄に必要な水量に達したか否かを判定する。予備洗浄に必要な水量に達したときは、給湯ポンプ11の駆動を停止し、次いで、洗浄ポンプ13を高速回転数A1で回転させる。この時、洗浄ノズル14から噴射されることによって低下する洗浄槽7内の水位(洗浄水)を反射型液面センサ10を通して検知し、この水位低下が定常状態になったときは、その時の水位を洗浄ポンプ13を駆動する前の水位から減算して水位差を求め、かつ、その水位差と予め設定された洗浄槽7の断面積Aとの積から回収されていない水量を算出し、これを第1の使用水量L1(上限使用水量)とする。   For example, when the controller 20 in the fourth embodiment detects an on-operation of a switch for promoting preliminary washing after detecting an on-operation of a dishwashing start switch (not shown), the first and second uses The operation for obtaining the water amounts L1, L2 and the predetermined amount L is started. When the water 4 is supplied into the tank 2, the hot water supply pump 11 is driven to supply the water 4 in the tank 2 to the cleaning tank 7, and the liquid level detection of the reflective liquid level sensor 10 is performed to detect the inside of the cleaning tank 7. It is determined whether or not the amount of water 4 has reached the amount of water necessary for preliminary cleaning. When the amount of water necessary for the preliminary cleaning is reached, the hot water supply pump 11 is stopped, and then the cleaning pump 13 is rotated at the high speed A1. At this time, when the water level in the cleaning tank 7 (washing water), which is lowered by being jetted from the washing nozzle 14, is detected through the reflective liquid level sensor 10, and this water level drop is in a steady state, the water level at that time The water level difference is obtained by subtracting the water level from before the cleaning pump 13 is driven, and the unrecovered amount of water is calculated from the product of the water level difference and the preset sectional area A of the cleaning tank 7, Is the first used water amount L1 (upper limit used water amount).

次に、洗浄ポンプ13を高速回転数A1から低速回転数A2に切り替えて、前記と同様に、洗浄槽7内の水位低下を反射型液面センサ10を通して検知し、この水位低下が定常状態になったときは、その時の水位を洗浄ポンプ13を駆動する前の水位から減算して水位差を求め、かつ、その水位差と洗浄槽7の断面積Aとの積から回収されていない水量を算出し、これを第2の使用水量L2とする。また、得られた第1及び第2の使用水量L1、L2から中間値を算出し、これを所定量Lとして設定する。なお、低速回転A21から高速回転A11に切り替えるときの一定量は、実施の形態1と同じ値である。   Next, the cleaning pump 13 is switched from the high speed rotation speed A1 to the low speed rotation speed A2, and the lowering of the water level in the cleaning tank 7 is detected through the reflective liquid level sensor 10 in the same manner as described above. When this happens, the water level at that time is subtracted from the water level before driving the cleaning pump 13 to obtain the water level difference, and the amount of water not recovered from the product of the water level difference and the cross-sectional area A of the cleaning tank 7 is calculated. It calculates and makes this 2nd use water amount L2. Further, an intermediate value is calculated from the obtained first and second water usage amounts L1 and L2, and this is set as a predetermined amount L. A certain amount when switching from the low speed rotation A21 to the high speed rotation A11 is the same value as in the first embodiment.

下かご8と上かご9に載置された食器の種類や数に応じた第1及び第2の使用水量L1、L2と所定量Lの算出が終了すると、排水ポンプ15を駆動して洗浄槽7内の汚水を排水させ、洗浄工程に入る。洗浄工程における洗浄ポンプ13の高速回転から低速回転への切り替えは、予備洗浄で算出した所定量Lに高速回転時の使用水量が達したときで、実施の形態1と同じように洗浄ポンプ13の回転数がパルス的に変化する。なお、すすぎ工程における洗浄ポンプ13は、洗浄工程と同じように制御する。   When the calculation of the first and second used water amounts L1 and L2 and the predetermined amount L according to the type and number of tableware placed on the lower basket 8 and the upper basket 9 is completed, the drain pump 15 is driven and the washing tank The waste water in 7 is drained and the cleaning process is started. The switching from the high speed rotation to the low speed rotation of the cleaning pump 13 in the cleaning process is performed when the amount of water used at the time of high speed rotation reaches the predetermined amount L calculated in the preliminary cleaning, as in the first embodiment. The rotation speed changes in a pulse manner. The cleaning pump 13 in the rinsing process is controlled in the same manner as in the cleaning process.

以上のように実施の形態4によれば、洗浄工程に入る前に、下かご8と上かご9に載置された食器の種類や数に応じて、洗浄ポンプ13を高速回転から低速回転に切り替えるための所定量Lを決めるようにしたので、洗浄ポンプ13がエア噛みを起こすこと無く、食器を洗浄(すすぎ)することができるという効果がある。   As described above, according to the fourth embodiment, before entering the cleaning process, the cleaning pump 13 is changed from a high speed rotation to a low speed rotation according to the type and number of tableware placed on the lower basket 8 and the upper basket 9. Since the predetermined amount L for switching is determined, there is an effect that the cleaning pump 13 can clean (rinse) the table without causing air biting.

実施の形態5.
実施の形態4では、下かご8と上かご9に設置された食器の種類や数に応じて第1及び第2の使用水量L1、L2を決定し、このL1とL2に基づいて洗浄ポンプ13を高速回転から低速回転に切り替えるための所定量Lを求るようにしたが、実施の形態5は、食器の設置後に洗浄水の回収率μを求め、この回収率μを実施の形態2に示す式(1)(2)に当てはめて第1及び第2の使用水量L1、L2を決定し、このL1とL2に基づいて前記の所定量Lを求めるようにしたものであり、以下、実施の形態5の食器洗浄機について説明をする。なお、本実施の形態5は、制御部20を除いて実施の形態1とほぼ同じであるため、図1を用いて説明する。
Embodiment 5 FIG.
In the fourth embodiment, the first and second water usage amounts L1 and L2 are determined according to the type and number of tableware installed in the lower basket 8 and the upper basket 9, and the washing pump 13 is based on the L1 and L2. The predetermined amount L for switching from high-speed rotation to low-speed rotation is obtained, but the fifth embodiment obtains the washing water recovery rate μ after installing the tableware, and this recovery rate μ is set to the second embodiment. The first and second water usage amounts L1 and L2 are determined by applying the formulas (1) and (2) shown, and the predetermined amount L is obtained based on these L1 and L2. The dishwasher of form 5 will be described. The fifth embodiment is substantially the same as the first embodiment except for the control unit 20, and will be described with reference to FIG.

実施の形態5においては、制御部20によって、前述した演算処理が行われ、洗浄工程に入る前の予備洗浄時に実行される。例えば、洗浄槽7に予備洗浄に必要な水量が蓄えられると、洗浄ポンプ13をしばらくの間駆動して停止させる。そして、反射型液面センサ10の液面検出を通して、予め設定された時間Δtの間に洗浄槽7の底部に回収される水量ΔXを算出し、その時の水位を反射型液面センサ10を通して測定する。図6に示すように、その時の水位をyとしたとき、予め設定された洗浄槽7の断面積Aとの積から洗浄槽7の底部に残っている洗浄水の水量Xを算出する。そして、下記に示す式にそれぞれの値を当てはめて回収率μを算出する。式中のSは、予備洗浄時に洗浄槽7内に供給された総水量である。
μ = ΔX/(S - X)Δt …(4)
In the fifth embodiment, the above-described arithmetic processing is performed by the control unit 20 and is performed at the time of preliminary cleaning before entering the cleaning process. For example, when the amount of water necessary for preliminary cleaning is stored in the cleaning tank 7, the cleaning pump 13 is driven for a while to stop. Then, through the liquid level detection of the reflective liquid level sensor 10, the amount of water ΔX collected at the bottom of the washing tank 7 during a preset time Δt is calculated, and the water level at that time is measured through the reflective liquid level sensor 10. To do. As shown in FIG. 6, when the water level at that time is y, the amount X of the cleaning water remaining at the bottom of the cleaning tank 7 is calculated from the preset cross-sectional area A of the cleaning tank 7. Then, the recovery rate μ is calculated by applying each value to the following formula. S in the formula is the total amount of water supplied into the cleaning tank 7 during the preliminary cleaning.
μ = ΔX / (S-X) Δt… (4)

前記のようにして得られた回収率μを、予め設定された実施の形態2と同じ式(1)(2)に当てはめて、第1及び第2の使用水量L1、L2を算出し、この得られた第1及び第2の使用水量L1、L2の中間値を算出し、これを、洗浄ポンプ13を高速回転から低速回転に切り替えるための所定量Lとして設定する。なお、実施の形態5においては、前記式(1) 中のW1は、洗浄ポンプ13を高速回転数A1で回転させたときの洗浄ノズル14から噴射される単位時間当たりの噴射水量であり、W2は、洗浄ポンプ13を低速回転数A2で回転させたときの洗浄ノズル14から噴射される単位時間当たりの噴射水量である。   The recovery rate μ obtained as described above is applied to the same formulas (1) and (2) as those in the second embodiment, and the first and second water usage amounts L1 and L2 are calculated. An intermediate value of the obtained first and second water usage amounts L1 and L2 is calculated, and this is set as a predetermined amount L for switching the washing pump 13 from high speed rotation to low speed rotation. In the fifth embodiment, W1 in the equation (1) is the amount of water jetted per unit time that is jetted from the washing nozzle 14 when the washing pump 13 is rotated at the high speed A1, and W2 Is the amount of jetted water per unit time that is jetted from the washing nozzle 14 when the washing pump 13 is rotated at the low speed A2.

その後は、排水ポンプ15を駆動して洗浄槽7内の汚水を排水させ、洗浄工程に入る。洗浄工程における洗浄ポンプ13の高速回転から低速回転への切り替えは、予備洗浄時で算出した所定量Lに高速回転時の使用水量が達したときで、実施の形態1と同じように洗浄ポンプ13の回転数がパルス的に変化する(図4参照)。なお、すすぎ工程においては、洗浄工程と同じように洗浄ポンプ13を制御する。   Thereafter, the drainage pump 15 is driven to drain the sewage in the cleaning tank 7 and the cleaning process is started. The switching from the high speed rotation to the low speed rotation of the cleaning pump 13 in the cleaning process is performed when the amount of water used at the high speed rotation reaches the predetermined amount L calculated at the time of preliminary cleaning, as in the first embodiment. The number of rotations changes in a pulse manner (see FIG. 4). In the rinsing process, the cleaning pump 13 is controlled as in the cleaning process.

以上のように実施の形態5によれば、洗浄工程に入る前の予備洗浄時に洗浄水の回収率を求め、この結果を基に洗浄ポンプ13を高速回転から低速回転に切り替えるための所定量Lを決定するようにしたので、各種の食器や、数の異なる食器が設置されたとしても、洗浄ポンプにエア噛みを起こさせること無く、節水効果のある食器洗浄機を提供できる。   As described above, according to the fifth embodiment, the recovery rate of the cleaning water is obtained during the preliminary cleaning before entering the cleaning process, and the predetermined amount L for switching the cleaning pump 13 from the high speed rotation to the low speed rotation based on this result. Therefore, even if various types of tableware or different types of tableware are installed, a dishwasher having a water-saving effect can be provided without causing the cleaning pump to chew air.

なお、前記の実施の形態5では、式(4) を用いて回収率μを求めるようにしたが、これに代えて、下記に示す式(5) から回収率μを求めるようにしてもよい。
μ = W/(S - X) …(5)
式中のW は、洗浄ポンプ13を定常状態に達するまで所定の回転数で回転させ、この時の洗浄ノズル14から噴射される単位時間当たり噴射水量、S は、予備洗浄時に洗浄槽7内に供給された総水量、X は、定常状態のときの洗浄槽7内に貯えられている洗浄水の水量である。この場合、この式より得られた回収率を基に洗浄ポンプ13を高速回転から低速回転に切り替えるための所定量Lを決定できるので、前記と同様に、各種の食器や数の異なる食器が設置されたとしても、洗浄ポンプにエア噛みを起こさせること無く、節水効果のある食器洗浄機を提供できる。
In the fifth embodiment, the recovery rate μ is obtained using the equation (4), but instead, the recovery rate μ may be obtained from the following equation (5). .
μ = W / (S-X) (5)
W in the formula rotates the cleaning pump 13 at a predetermined rotational speed until it reaches a steady state. At this time, the amount of water sprayed from the cleaning nozzle 14 is injected into the cleaning tank 7 during preliminary cleaning. The total amount of water supplied, X, is the amount of cleaning water stored in the cleaning tank 7 in the steady state. In this case, since the predetermined amount L for switching the washing pump 13 from the high speed rotation to the low speed rotation can be determined based on the recovery rate obtained from this equation, various types of tableware and different types of tableware are installed as described above. Even if this is done, a dishwasher with a water-saving effect can be provided without causing the cleaning pump to chew air.

また、式(4) 及び式(5) で得られた回収率μから第1及び第2の使用水量L1、L2を算出するようにしたが、この回収率μを実施の形態3で述べた式(3) に当てはめて、洗浄工程とすすぎ工程に各工程で必要な総水量Sを求めるようにしても良い。   In addition, the first and second water usage amounts L1 and L2 are calculated from the recovery rates μ obtained by the equations (4) and (5). The recovery rates μ are described in the third embodiment. By applying the equation (3), the total water amount S required in each step for the washing step and the rinsing step may be obtained.

ところで、前述した各実施の形態では、食器洗浄機の構成として、洗浄水を一旦タンク2に貯水して加熱し、その後、洗浄槽7へ給湯する構成として説明したが、これに限るものではなく、洗浄槽7へ直接注水し、洗浄槽7内に設置したヒータ6で湯沸しながら洗浄する食器洗浄機にも適用できることは明白である。また、反射型液面センサ10は、水位を検知することができる電界センサ等のセンサに置き換えることができる。   By the way, in each embodiment mentioned above, as a structure of the dishwasher, although wash water was once stored in the tank 2 and heated, it demonstrated as a structure which supplies hot water to the washing tank 7, However, it is not restricted to this. It is apparent that the present invention can also be applied to a dishwasher in which water is poured directly into the washing tank 7 and washed while boiling with the heater 6 installed in the washing tank 7. Moreover, the reflective liquid level sensor 10 can be replaced with a sensor such as an electric field sensor that can detect the water level.

本発明の実施の形態1に係る食器洗浄機を示す概略構成図である。It is a schematic block diagram which shows the dishwasher which concerns on Embodiment 1 of this invention. 高速回転時と低速回転時に洗浄に使用される水量の説明図である。It is explanatory drawing of the amount of water used for washing | cleaning at the time of high speed rotation and low speed rotation. 洗浄ポンプの回転数と洗浄に使用される水量の相関を示す図である。It is a figure which shows the correlation of the rotation speed of a washing pump, and the amount of water used for washing | cleaning. 洗浄ポンプの回転数の変化を示す図である。It is a figure which shows the change of the rotation speed of a washing pump. 実施の形態3における洗浄ポンプの回転数の変化を示す図である。It is a figure which shows the change of the rotation speed of the washing pump in Embodiment 3. FIG. 洗浄槽に貯えられている洗浄水の水量と水位の関係を示す図である。It is a figure which shows the relationship between the amount of washing water stored in the washing tank, and the water level.

符号の説明Explanation of symbols

1 食器洗浄機本体、2 タンク、5 水位センサ、6 ヒータ、7 洗浄槽、8 下かご、9 上かご、10 反射型液面センサ、11 給湯ポンプ、13 洗浄ポンプ、
13a ケーシング部、13b モータ、14 洗浄ノズル、14a 噴射口、15 排水ポンプ。
1 dishwasher body, 2 tanks, 5 water level sensor, 6 heater, 7 washing tank, 8 lower basket, 9 upper basket, 10 reflective liquid level sensor, 11 hot water pump, 13 washing pump,
13a casing part, 13b motor, 14 cleaning nozzle, 14a injection port, 15 drainage pump.

Claims (7)

食器類を収納する洗浄槽と、
該洗浄槽内に供給された洗浄水を吸引して加圧する洗浄ポンプと、
前記洗浄槽内に配設され、前記洗浄ポンプからの加圧に応じて水を噴射しながら回転し、洗浄槽内の食器類を洗浄する洗浄ノズルと、
該洗浄ポンプを高速回転と低速回転とを交互に繰り返し切り替えて、前記洗浄ノズルから噴射される洗浄水の噴射量を変化させ、高速回転時に使用される水量が所定量を超える前に低速回転に切り替える制御手段と
を備えたことを特徴とする食器洗浄機。
A washing tank for storing tableware,
A cleaning pump for sucking and pressurizing the cleaning water supplied into the cleaning tank;
A cleaning nozzle that is disposed in the cleaning tank, rotates while spraying water in response to pressure from the cleaning pump, and cleans dishes in the cleaning tank;
The cleaning pump is alternately and repeatedly switched between high speed rotation and low speed rotation to change the amount of cleaning water sprayed from the cleaning nozzle, and before the amount of water used during high speed rotation exceeds a predetermined amount, the speed is decreased to low speed rotation. A dishwasher comprising a control means for switching.
前記洗浄槽内の洗浄水の液面を検出する液面センサを備え、
前記制御手段は、高速回転時に使用される水量が前記所定量を超える前か否かを前記液面センサを通して判定することを特徴とする請求項1記載の食器洗浄機。
A liquid level sensor for detecting the level of the cleaning water in the cleaning tank;
2. The dishwasher according to claim 1, wherein the control means determines whether or not the amount of water used during high-speed rotation exceeds the predetermined amount through the liquid level sensor.
前記制御手段は、高速回転から低速回転への切り替えタイミングを、高速回転時に使用される水量が前記所定量を超えない範囲内の時間に基づいていることを特徴とする請求項1記載の食器洗浄機。   2. The dishwashing according to claim 1, wherein the control means is based on a time within a range in which the amount of water used during high-speed rotation does not exceed the predetermined amount when switching from high-speed rotation to low-speed rotation. Machine. 前記制御手段は、前記洗浄ポンプを高速で回転させたときの噴射水量、及び予め得られ洗浄水の回収率に基づいて高速回転時に使用される水量の上限使用水量を算出し、かつ、算出した上限使用水量より少ない前記所定量を算出して、これを前記洗浄ポンプの高速回転から低速回転時への切り替えタイミングとすることを特徴とする請求項1又は2記載の食器洗浄機。   The control means calculates and calculates an upper limit use amount of water used when rotating the high-speed rotation based on a jet water amount when the cleaning pump is rotated at a high speed and a recovery rate of the cleaning water obtained in advance. 3. The dishwasher according to claim 1, wherein the predetermined amount smaller than the upper limit water usage is calculated and used as a switching timing from a high speed rotation to a low speed rotation of the washing pump. 前記制御手段は、予め前記洗浄ポンプの高速回転時と低速回転時の各時間が設定され、この各時間及び予め得られた洗浄水の回収率に基づいて、洗浄工程とすすぎ工程でそれぞれ必要な総水量を算出し、該総水量を前記洗浄槽内に供給させることを特徴とする請求項1又は3記載の食器洗浄機。   The control means is set in advance for each time of high speed rotation and low speed rotation of the cleaning pump, and is necessary for each of the cleaning process and the rinsing process based on each time and the recovery rate of the cleaning water obtained in advance. 4. The dishwasher according to claim 1, wherein a total amount of water is calculated, and the total amount of water is supplied into the washing tank. 前記制御手段は、洗浄工程に入る前に前記洗浄ポンプを高速で回転させて、該洗浄ポンプを回転させる前からの洗浄槽内の低下水位を前記液面センサを通して測定し、かつ、その低下水位に基づいて高速回転時に使用される水量の上限使用水量を算出し、次いで、算出した上限使用水量より少ない前記所定量を算出して、これを前記洗浄ポンプの高速回転から低速回転時への切り替えタイミングとすることを特徴とする請求項2記載の食器洗浄機。   The control means rotates the washing pump at a high speed before entering the washing step, measures the lowered water level in the washing tank from before the washing pump is rotated through the liquid level sensor, and the lowered water level. Based on the above, the upper limit amount of water used during high speed rotation is calculated, then the predetermined amount less than the calculated upper limit water consumption is calculated, and this is switched from the high speed rotation of the washing pump to the low speed rotation. 3. The dishwasher according to claim 2, wherein timing is set. 前記制御手段は、洗浄工程に入る前に前記洗浄ポンプを回転させて前記洗浄ノズルから洗浄水を噴射させ、該洗浄ポンプを停止させたときの前記洗浄槽内の残りの水量に基づいて洗浄水の回収率を算出することを特徴とする請求項4又は5記載の食器洗浄機。
The control means rotates the cleaning pump before jetting into the cleaning process to inject cleaning water from the cleaning nozzle, and based on the remaining amount of water in the cleaning tank when the cleaning pump is stopped 6. The dishwasher according to claim 4 or 5, wherein the recovery rate of the dish is calculated.
JP2006168389A 2006-06-19 2006-06-19 Dishwasher Expired - Fee Related JP4553871B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009279052A (en) * 2008-05-20 2009-12-03 Sanyo Electric Co Ltd Water level detector of high pressure steam sterilizer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11346989A (en) * 1998-06-05 1999-12-21 Matsushita Electric Ind Co Ltd Dishwasher
JP2000254071A (en) * 1999-03-08 2000-09-19 Toshiba Corp Dishwasher
JP2005087466A (en) * 2003-09-17 2005-04-07 Toshiba Corp Drum type washing machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11346989A (en) * 1998-06-05 1999-12-21 Matsushita Electric Ind Co Ltd Dishwasher
JP2000254071A (en) * 1999-03-08 2000-09-19 Toshiba Corp Dishwasher
JP2005087466A (en) * 2003-09-17 2005-04-07 Toshiba Corp Drum type washing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009279052A (en) * 2008-05-20 2009-12-03 Sanyo Electric Co Ltd Water level detector of high pressure steam sterilizer

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