JP2022054273A - Treatment agent feeder and dishwasher - Google Patents

Treatment agent feeder and dishwasher Download PDF

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JP2022054273A
JP2022054273A JP2020161362A JP2020161362A JP2022054273A JP 2022054273 A JP2022054273 A JP 2022054273A JP 2020161362 A JP2020161362 A JP 2020161362A JP 2020161362 A JP2020161362 A JP 2020161362A JP 2022054273 A JP2022054273 A JP 2022054273A
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passage
treatment agent
pump
switching means
mainstream
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直人 高木
Naoto Takagi
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Rinnai Corp
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Rinnai Corp
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Priority to JP2020161362A priority Critical patent/JP2022054273A/en
Priority to CN202110922629.1A priority patent/CN114246534A/en
Publication of JP2022054273A publication Critical patent/JP2022054273A/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4223—Devices for water discharge, e.g. devices to prevent siphoning, non-return valves
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4244—Water-level measuring or regulating arrangements
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A47L15/4418—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants in the form of liquids
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/09—Water level
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

To allow a treatment agent to be efficiently supplied for a supplied part 2 whether or not a pump 451 is non-driven during sending operation in a treatment agent feeder in which changeover means 44 is disposed at a confluent part of a main stream passage 42 supplying water and a sub flow passage 43 continuing a storage tank 40, is provided with a suction unit 45 having the pump 451 and check valves 452, 454 on an upper stream side and a downstream side at a downstream side part 42b of the main flow passage, and performs suction operation sucking the treatment agent from the storage tank 40 to the downstream side part 42b of the main flow passage and sending operation sending the sucked treatment agent to the supplied part 2 together with water.SOLUTION: A pump 451 is held on stand-by without being driven in the state that pressure loss of the pump 451 is pressure loss at a minimum cross-sectional part of a main flow passage 42.SELECTED DRAWING: Figure 2

Description

本発明は、洗剤等の処理剤の貯蔵タンクから吸い出した所定量の処理剤を水と共に被供給部に供給可能な処理剤供給装置並びにこの処理剤供給装置を具備する食器洗浄機に関する。 The present invention relates to a treatment agent supply device capable of supplying a predetermined amount of treatment agent sucked out from a storage tank for treatment agents such as detergent to a supplied portion together with water, and a dishwasher provided with the treatment agent supply device.

従来、この種の処理剤供給装置として、被供給部に水を供給する、上流端に給水弁が設けられた主流通路と、貯蔵タンクに貯蔵された処理剤を主流通路に導入する副流通路とを備え、副流通路に、容積式のポンプと、ポンプに吸い込まれる流れのみを許容する上流側の第１逆止弁と、第１逆止弁とポンプとの間の流入路と、ポンプから押し出される流れのみを許容する下流側の第２逆止弁と、ポンプと第２逆止弁との間の流出路とで構成される吸い出しユニットを介設し、給水弁を開弁させると共にポンプを駆動することで、貯蔵タンクから所定量の処理剤を吸い出して主流通路に送り出し、この処理剤を主流通路を介して水と共に被供給部に供給するようにしたものが知られている（例えば、特許文献１参照）。然し、このものでは、ポンプ内や逆止弁内の処理剤を水で洗い流すことができないため、ポンプ内や逆止弁内に付着残留した処理剤が固まって、吸い出しユニットの動作不良を生ずることがある。 Conventionally, as this type of treatment agent supply device, a mainstream passage provided with a water supply valve at the upstream end for supplying water to the supplied portion and a sidestream passage for introducing the treatment agent stored in the storage tank into the mainstream passage. In the sidestream passage, a positive displacement pump, a first check valve on the upstream side that allows only the flow sucked into the pump, an inflow path between the first check valve and the pump, and a pump. A suction unit consisting of a second check valve on the downstream side that allows only the flow pushed out from the pump and an outflow path between the pump and the second check valve is provided to open the water supply valve. It is known that by driving a pump, a predetermined amount of a treatment agent is sucked out from a storage tank and sent out to a mainstream passage, and this treatment agent is supplied to a supplied portion together with water through the mainstream passage (). For example, see Patent Document 1). However, in this case, since the treatment agent in the pump and the check valve cannot be washed away with water, the treatment agent adhering and remaining in the pump and the check valve solidifies, causing a malfunction of the suction unit. There is.

そこで、従来、主流通路と副流通路との合流部に切替手段を配設し、切替手段の下流側の主流通路の部分に吸い出しユニットを介設すると共に、切替手段の上流側の主流通路の部分と吸い出しユニットの下流側の主流通路の部分とを接続するバイパス路を設けた第１のタイプの処理剤供給装置や、主流通路と副流通路との合流部に配設した切替手段の上流側の主流通路の部分と切替手段の下流側の主流通路の部分とを接続するように設けられたバイパス路に吸い出しユニットを介設した第２のタイプの処理剤供給装置が考えられている。 Therefore, conventionally, a switching means is provided at the confluence of the mainstream passage and the sidestream passage, a suction unit is provided in the portion of the mainstream passage on the downstream side of the switching means, and the mainstream passage on the upstream side of the switching means is provided. The first type of treatment agent supply device provided with a bypass path connecting the portion and the portion of the mainstream passage on the downstream side of the suction unit, and the upstream of the switching means arranged at the confluence of the mainstream passage and the sidestream passage. A second type of treatment agent supply device in which a suction unit is interposed in a bypass path provided so as to connect a portion of the mainstream passage on the side and a portion of the mainstream passage on the downstream side of the switching means is considered.

ここで、第１のタイプの処理剤供給装置では、切替手段を、切替手段の上流側の主流通路の部分と下流側の主流通路の部分との連通を遮断すると共に副流通路と切替手段の下流側の主流通路の部分とを連通する第１の状態と、切替手段の上流側の主流通路の部分と下流側の主流通路の部分とを連通すると共に副流通路と切替手段の下流側の主流通路の部分との連通を遮断する第２の状態とに切替え可能とする。そして、処理剤供給装置の制御手段は、給水弁を閉弁させると共に切替手段を第１の状態に切替えた状態でポンプを駆動して、貯蔵タンクから切替手段の下流側の主流通路の部分に向けて所定量の処理剤を吸い出す吸い出し運転と、給水弁を開弁させると共に切替手段を第２の状態に切替えて、吸い出し運転で吸い出された所定量の処理剤を主流通路を介して水と共に被供給部に送り出す送り出し運転とを実行するように構成される。このものでは、送り出し運転時に、ポンプ内や逆止弁内の処理剤が主流通路を通る水で洗い流されるため、ポンプ内や逆止弁内に付着残留する処理剤による吸い出しユニットの動作不良を防止できる。 Here, in the first type of treatment agent supply device, the switching means is cut off from the communication between the mainstream passage portion on the upstream side and the mainstream passage portion on the downstream side of the switching means, and the sidestream passage and the switching means are used. The first state of communicating with the portion of the mainstream passage on the downstream side, and the portion of the mainstream passage on the upstream side of the switching means and the portion of the mainstream passage on the downstream side are communicated with each other, and the sidestream passage and the downstream side of the switching means are communicated with each other. It is possible to switch to the second state in which communication with the mainstream passage is cut off. Then, the control means of the treatment agent supply device drives the pump in a state where the water supply valve is closed and the switching means is switched to the first state, from the storage tank to the portion of the mainstream passage on the downstream side of the switching means. A suction operation for sucking out a predetermined amount of the treatment agent toward the water, and a water supply valve are opened and the switching means is switched to the second state, and the predetermined amount of the treatment agent sucked out in the suction operation is watered through the mainstream passage. At the same time, it is configured to execute a sending operation of sending to the supplied unit. In this product, the treatment agent in the pump and check valve is washed away by the water passing through the mainstream passage during the delivery operation, which prevents the suction unit from malfunctioning due to the treatment agent adhering and remaining in the pump and check valve. can.

また、第２のタイプの処理剤供給装置では、切替手段を、切替手段の上流側の主流通路の部分と下流側の主流通路の部分との連通を遮断すると共に副流通路と切替手段の上流側の主流通路の部分とを連通する第１の状態と、切替手段の上流側の主流通路の部分と下流側の主流通路の部分とを連通すると共に副流通路と切替手段の上流側の主流通路の部分との連通を遮断する第２の状態とに切替え可能とする。そして、処理剤供給装置の制御手段は、給水弁を閉弁させると共に切替手段を第１の状態に切替えた状態でポンプを駆動して、貯蔵タンクから切替手段の上流側の主流通路の部分に向けて所定量の処理剤を吸い出す吸い出し運転と、給水弁を開弁させると共に切替手段を第２の状態に切替えて、吸い出し運転で吸い出された所定量の処理剤を主流通路を介して水と共に被供給部に送り出す送り出し運転とを実行するように構成される。このものでは、切替手段の上流側の主流通路の部分の容積を上記所定量以上にすることで、吸い出し運転時に吸い出しユニットまで処理剤が到達しなくなる。そのため、ポンプ内や逆止弁内に処理剤が入らず、ポンプ内や逆止弁内に付着残留する処理剤による吸い出しユニットの動作不良を未然に防止できる。尚、吸い出し運転時に吸い出しユニットまで処理剤が到達しても、送り出し運転時にポンプ内や逆止弁内の処理剤がバイパス路を通る水で洗い流されるため、吸い出しユニットの動作不良を防止できる。 Further, in the second type of treatment agent supply device, the switching means is cut off from the communication between the mainstream passage portion on the upstream side of the switching means and the mainstream passage portion on the downstream side, and the sidestream passage and the upstream of the switching means are cut off. The first state of communicating with the part of the mainstream passage on the side, the part of the mainstream passage on the upstream side of the switching means and the part of the mainstream passage on the downstream side are communicated, and the sidestream passage and the mainstream on the upstream side of the switching means are communicated with each other. It is possible to switch to the second state in which communication with the passage portion is cut off. Then, the control means of the treatment agent supply device drives the pump in a state where the water supply valve is closed and the switching means is switched to the first state, from the storage tank to the portion of the mainstream passage on the upstream side of the switching means. A suction operation for sucking out a predetermined amount of the treatment agent toward the water, and a water supply valve are opened and the switching means is switched to the second state, and the predetermined amount of the treatment agent sucked out in the suction operation is watered through the mainstream passage. At the same time, it is configured to execute a sending operation of sending to the supplied unit. In this case, by increasing the volume of the mainstream passage portion on the upstream side of the switching means to the above-mentioned predetermined amount or more, the processing agent does not reach the suction unit during the suction operation. Therefore, the treatment agent does not enter the pump or the check valve, and it is possible to prevent the suction unit from malfunctioning due to the treatment agent adhering and remaining in the pump or the check valve. Even if the treatment agent reaches the suction unit during the suction operation, the treatment agent in the pump and the check valve is washed away by the water passing through the bypass path during the delivery operation, so that the malfunction of the suction unit can be prevented.

ところで、上記第１のタイプの処理剤供給装置では、送り出し運転時にポンプを駆動することも可能であるが、省エネとポンプ寿命アップとを図るには、送り出し運転時にポンプを非駆動とすることが望ましい。但し、送り出し運転時に、ポンプを、ポンプでの圧力損失が大きくなる状態（ポンプの押し出し工程のストロークエンドに近い状態）で、駆動せずに待機させたのでは、バイパス路に水が流れやすくなって、主流通路に流れる水量が減少し、吸い出し運転時に主流通路に吸い出された所定量の処理剤を被供給部に効率よく送り出せなくなってしまう。 By the way, in the above-mentioned first type of processing agent supply device, it is possible to drive the pump during the delivery operation, but in order to save energy and extend the life of the pump, it is possible to non-drive the pump during the delivery operation. desirable. However, if the pump is made to stand by without being driven in a state where the pressure loss in the pump is large (a state close to the stroke end of the pumping process) during the sending operation, water tends to flow in the bypass passage. As a result, the amount of water flowing into the mainstream passage is reduced, and a predetermined amount of the treatment agent sucked into the mainstream passage during the suction operation cannot be efficiently pumped to the supplied portion.

また、上記第２のタイプの処理剤供給装置では、送り出し運転時にポンプを非駆動とする必要がある。但し、送り出し運転時に、ポンプを、ポンプでの圧力損失が小さくなる状態（ポンプの吸い込み工程のストロークエンドに近い状態）で、駆動せずに待機させたのでは、バイパス路に水が流れやすくなり、上記と同様に主流通路に流れる水量が減少し、吸い出し運転時に主流通路に吸い出された所定量の処理剤を被供給部に効率よく送り出せなくなってしまう。 Further, in the second type of treatment agent supply device, it is necessary to make the pump non-drive during the delivery operation. However, if the pump is kept on standby without being driven in a state where the pressure loss in the pump is small (close to the stroke end of the pump suction process) during the delivery operation, water tends to flow in the bypass passage. As described above, the amount of water flowing in the mainstream passage is reduced, and a predetermined amount of the treatment agent sucked into the mainstream passage during the suction operation cannot be efficiently pumped to the supplied portion.

特開２０２０－７４８２３号公報Japanese Unexamined Patent Publication No. 2020-74823

本発明は、以上の点に鑑み、上記第１や第２のタイプの処理剤供給装置であって、送り出し運転時にポンプを非駆動とするにも拘らず、処理剤を効率よく被供給部に送り出すことができるようにしたものを提供することを第１の課題とし、また、この処理剤供給装置を具備する食器洗浄機を提供することを第２の課題としている。 In view of the above points, the present invention is the first or second type of treatment agent supply device, and despite the fact that the pump is not driven during the delivery operation, the treatment agent is efficiently delivered to the supplied portion. The first task is to provide what can be sent out, and the second task is to provide a dishwasher equipped with this processing agent supply device.

上記第１の課題を解決するために、本願の第１発明は、上記第１のタイプの処理剤供給装置において、制御手段は、送り出し運転時に、ポンプを、ポンプでの圧力損失が主流通路の最小断面積部での圧力損失以下になる状態で、駆動せずに待機させる制御を行うように構成されることを特徴とし、また、本願の第２発明は、上記第２のタイプの処理剤供給装置において、制御手段は、送り出し運転時に、ポンプを、ポンプでの圧力損失が主流通路の最小断面積部での圧力損失以上になる状態で、駆動せずに待機させる制御を行うように構成されることを特徴とする。 In order to solve the first problem, the first invention of the present application is in the first type of treatment agent supply device, in which the control means is a pump during the delivery operation, and the pressure loss in the pump is the mainstream passage. It is characterized in that it is configured to control to stand by without being driven in a state where the pressure loss is equal to or less than the pressure loss in the minimum cross-sectional area, and the second invention of the present application is the second type of treatment agent. In the supply device, the control means is configured to control the pump to stand by without being driven in a state where the pressure loss in the pump is equal to or greater than the pressure loss in the minimum cross-sectional area of the mainstream passage during the delivery operation. It is characterized by being done.

また、上記第２の課題を解決するために、本願の第３発明は、食器類を収納する洗浄槽を備える食器洗浄機であって、処理剤たる洗剤の貯蔵タンクから吸い出した所定量の洗剤を水と共に被供給部たる洗浄槽に供給可能な処理剤供給装置を備えるものにおいて、処理剤供給装置が上記第１発明や第２発明の処理剤供給装置で構成されることを特徴とする。 Further, in order to solve the second problem, the third invention of the present application is a dishwasher provided with a washing tank for storing tableware, and a predetermined amount of detergent sucked out from a storage tank of a detergent as a treatment agent. The treatment agent supply device is provided with a treatment agent supply device capable of supplying water together with water to a washing tank, which is a unit to be supplied, and is characterized in that the treatment agent supply device is composed of the treatment agent supply devices of the first invention and the second invention.

第１発明によれば、送り出し運転時に駆動せずに待機するポンプでの圧力損失は、主流通路の最小断面積部での圧力損失以下となるため、バイパス路に水が流れやすくなることはなく、主流通路に流れる水の流量は最小断面積部で律速される流量以下にはならない。また、第２発明によれば、送り出し運転時に駆動せずに待機するポンプでの圧力損失は、主流通路の最小断面積部での圧力損失以上となるため、吸い出しユニットを介設したバイパス路に水が流れやすくなることはなく、主流通路に流れる水の流量は最小断面積部で律速される流量以下にはならない。従って、第１発明と第２発明の何れにおいても、送り出し運転時にポンプを非駆動とするにも拘らず、吸い出し運転で主流通路に吸い出された所定量の処理剤を効率よく被供給部に送り出すことができる。 According to the first invention, the pressure loss in the pump that stands by without being driven during the delivery operation is less than the pressure loss in the minimum cross-sectional area of the mainstream passage, so that water does not easily flow in the bypass path. , The flow rate of water flowing in the mainstream passage does not fall below the flow rate regulated by the minimum cross-sectional area. Further, according to the second invention, the pressure loss in the pump that stands by without being driven during the feeding operation is larger than the pressure loss in the minimum cross-sectional area of the mainstream passage, so that the bypass path provided with the suction unit is used. The flow rate of water does not become easy to flow, and the flow rate of water flowing in the mainstream passage does not become less than the flow rate regulated by the minimum cross-sectional area. Therefore, in both the first invention and the second invention, although the pump is not driven during the feeding operation, a predetermined amount of the treatment agent sucked into the mainstream passage in the sucking operation is efficiently delivered to the supplied portion. Can be sent out.

本発明の実施形態の処理剤供給装置を具備する食器洗浄機の模式的切断側面図。The schematic cutting side view of the dishwasher provided with the processing agent supply apparatus of embodiment of this invention. 本発明の第１実施形態の処理剤供給装置の回路図。The circuit diagram of the processing agent supply apparatus of 1st Embodiment of this invention. 本発明の第２実施形態の処理剤供給装置の回路図。The circuit diagram of the processing agent supply apparatus of the 2nd Embodiment of this invention.

図１に示す食器洗浄機は、外装ケース１と、外装ケース１内に前方に出し入れ自在に設けられた、食器類Ｗを収納する洗浄槽２とを備えており、この洗浄槽２内に給水路３と後記詳述する処理剤供給装置４とを介して水が供給される。洗浄槽２内には、食器類Ｗを載置する食器カゴ２１と、食器カゴ２１に向けて洗浄水を噴射する洗浄ノズル２２と、ヒータ２３とが設けられている。給水路３には、止水栓３１が介設されると共に、止水栓３１の下流側の給水路３の部分に水抜き栓３２が接続されている。 The dishwasher shown in FIG. 1 includes an outer case 1 and a washing tank 2 for storing tableware W, which is provided in the outer case 1 so as to be freely moved forward and backward, and water is supplied into the washing tank 2. Water is supplied through the passage 3 and the treatment agent supply device 4 described in detail later. The washing tank 2 is provided with a tableware basket 21 on which the tableware W is placed, a washing nozzle 22 for injecting washing water toward the tableware basket 21, and a heater 23. A water stop valve 31 is interposed in the water supply channel 3, and a water drain plug 32 is connected to a portion of the water supply channel 3 on the downstream side of the water stop valve 31.

洗浄槽２の底部には、水溜り部２４が凹設されている。そして、水溜り部２４に連通する洗浄・排水ポンプ５が設けられ、更に、水溜り部２４に連通して洗浄槽２内の水位を検知する水位検知装置６が設けられている。洗浄・排水ポンプ５を正転させると、洗浄水が洗浄ノズル２２を介して洗浄槽２内に循環され、洗浄・排水ポンプ５を逆転させると、洗浄槽２内の洗浄水が排水路７を介して排水される。排水路７には、逆流防止のための逆Ｕ字状の立上り部７１と、エア抜き部７２と、排水トラップ部７３と、逆止弁７４とが設けられている。 A water pool 24 is recessed in the bottom of the washing tank 2. A cleaning / drainage pump 5 communicating with the water pool 24 is provided, and a water level detecting device 6 communicating with the water pool 24 to detect the water level in the cleaning tank 2 is provided. When the cleaning / drainage pump 5 is rotated in the normal direction, the cleaning water is circulated in the cleaning tank 2 via the cleaning nozzle 22, and when the cleaning / drainage pump 5 is reversed, the cleaning water in the cleaning tank 2 passes through the drainage channel 7. It is drained through. The drainage channel 7 is provided with a reverse U-shaped rising portion 71 for preventing backflow, an air bleeding portion 72, a drain trap portion 73, and a check valve 74.

外装ケース１内には、洗浄槽２内に乾燥用の空気を送風する乾燥ファン８が設けられている。また、洗浄槽２の前面の中空の前扉部２５内には、処理剤供給装置４と、洗浄・排水ポンプ５、ヒータ２３及び乾燥ファン８を制御すると共に処理剤供給装置４の制御手段に兼用されるコントローラ９とが設けられ、更に、前扉部２５の上端には、電源スイッチや運転スイッチ等の各種スイッチが配置された操作部２６が設けられている。 Inside the outer case 1, a drying fan 8 for blowing air for drying is provided in the cleaning tank 2. Further, in the hollow front door portion 25 on the front surface of the cleaning tank 2, the processing agent supply device 4, the cleaning / drainage pump 5, the heater 23 and the drying fan 8 are controlled, and the processing agent supply device 4 is controlled. A controller 9 that is also used is provided, and an operation unit 26 in which various switches such as a power switch and an operation switch are arranged is provided at the upper end of the front door portion 25.

操作部２６の運転スイッチをオンすると、先ず、処理剤供給装置４により処理剤たる洗剤が水と共に被供給部たる洗浄槽２に供給され、洗浄槽２内の水位が所定水位になってこれが水位検知装置６で検知されたときに洗剤及び水の供給が停止される。次に、ヒータ２３に通電すると共に洗浄・排水ポンプ５を正転させて、洗浄水（洗剤が混合した水）を加熱しつつ洗浄ノズル２２から噴射させ、所定時間の洗浄運転を行う。洗浄運転完了後は、洗浄・排水ポンプ５を逆転させて洗浄槽２内の洗浄水を排水し、次に、洗浄槽２に所定水位になるまで処理剤供給装置４を介して水を供給した後、洗浄・排水ポンプ５を正転させて洗浄ノズル２２から水を噴射させ、所定時間のすすぎ運転を行う。すすぎ運転完了後は、洗浄・排水ポンプ５を逆転させて洗浄槽２内の水を排水し、次に、ヒータ２３に通電すると共に乾燥ファン８を駆動させて、所定時間の乾燥運転を行う。 When the operation switch of the operation unit 26 is turned on, first, the detergent as a treatment agent is supplied to the cleaning tank 2 as a supply unit together with water by the treatment agent supply device 4, and the water level in the cleaning tank 2 becomes a predetermined water level, which is the water level. When detected by the detection device 6, the supply of detergent and water is stopped. Next, the heater 23 is energized and the cleaning / drainage pump 5 is rotated in the normal direction to inject the cleaning water (water mixed with the detergent) from the cleaning nozzle 22 while heating, and the cleaning operation is performed for a predetermined time. After the washing operation was completed, the washing / draining pump 5 was reversed to drain the washing water in the washing tank 2, and then water was supplied to the washing tank 2 via the treatment agent supply device 4 until the predetermined water level was reached. After that, the washing / draining pump 5 is rotated in the normal direction to inject water from the washing nozzle 22, and the rinsing operation is performed for a predetermined time. After the rinsing operation is completed, the washing / draining pump 5 is reversed to drain the water in the washing tank 2, and then the heater 23 is energized and the drying fan 8 is driven to perform the drying operation for a predetermined time.

以下、図２を参照して、処理剤供給装置４について説明する。処理剤供給装置４は、洗剤の貯蔵タンク４０から吸い出した所定量の洗剤を水と共に洗浄槽２に供給可能である。処理剤供給装置４は、洗浄槽２に水を供給する、上流端に給水弁４１が設けられた主流通路４２を備えており、給水弁４１に給水路３の下流端が接続されている。処理剤供給装置４は、更に、貯蔵タンク４０に貯蔵された洗剤を主流通路４２に導入する副流通路４３と、主流通路４２と副流通路４３との合流部に配設された切替手段たる切替弁４４と、洗剤の吸い出しユニット４５とを備えている。 Hereinafter, the treatment agent supply device 4 will be described with reference to FIG. 2. The treatment agent supply device 4 can supply a predetermined amount of detergent sucked out from the detergent storage tank 40 to the washing tank 2 together with water. The treatment agent supply device 4 includes a mainstream passage 42 provided with a water supply valve 41 at the upstream end for supplying water to the cleaning tank 2, and the downstream end of the water supply channel 3 is connected to the water supply valve 41. The treatment agent supply device 4 is a switching means provided at a sidestream passage 43 for introducing the detergent stored in the storage tank 40 into the mainstream passage 42 and a confluence portion between the mainstream passage 42 and the sidestream passage 43. It includes a switching valve 44 and a detergent suction unit 45.

吸い出しユニット４５は、モータ４５１ａによりクランク機構４５１ｂを介して往復動作するピストンやプランジャやダイヤフラムなどから成る動作部材４５１ｃを有する容積式のポンプ４５１と、ポンプ４５１に吸い込まれる流れのみを許容する第１逆止弁４５２と、第１逆止弁４５２とポンプ４５１との間の流入路４５３と、ポンプ４５１から押し出される流れのみを許容する第２逆止弁４５４と、ポンプ４５１と第２逆止弁４５４との間の流出路４５５とで構成されている。そして、切替弁４４の下流側の主流通路４２の部分４２ｂに吸い出しユニット４５を介設している。また、切替弁４４の上流側の主流通路４２の部分４２ａと吸い出しユニット４５の下流側の主流通路４２の部分とを接続するバイパス路４６と、何らかの原因で給水路３側が負圧になったときに洗浄槽２内の空気を主流通路４２の上流部に吸い込む負圧時吸気路４７とが設けられている。尚、負圧時吸気路４７は、非常に細い管で構成されていて、管路抵抗がかなり高く、水は殆ど流れない。また、負圧時吸気路４７を非常に細い管で構成せずに、例えば、主流通路４２からの分岐部に、バキュームブレーカや減圧式逆流防止器等の逆流防止装置を配設するなどの逆流防止対策を施してもよい。 The suction unit 45 is a positive displacement pump 451 having an operating member 451c including a piston, a plunger, a diaphragm, etc. that reciprocate via a crank mechanism 451b by a motor 451a, and a first reverse that allows only the flow sucked into the pump 451. A stop valve 452, an inflow path 453 between the first check valve 452 and the pump 451 and a second check valve 454 that allows only the flow extruded from the pump 451, a pump 451 and a second check valve 454. It is composed of an outflow passage 455 between and. A suction unit 45 is interposed in a portion 42b of the mainstream passage 42 on the downstream side of the switching valve 44. Further, when the bypass passage 46 connecting the portion 42a of the mainstream passage 42 on the upstream side of the switching valve 44 and the portion of the mainstream passage 42 on the downstream side of the suction unit 45 and the water supply passage 3 side become negative pressure for some reason. Is provided with a negative pressure intake passage 47 for sucking the air in the cleaning tank 2 into the upstream portion of the mainstream passage 42. The intake passage 47 at the time of negative pressure is composed of a very thin pipe, has a considerably high pipe resistance, and hardly flows water. Further, instead of forming the intake passage 47 under negative pressure with a very thin pipe, for example, a backflow prevention device such as a vacuum breaker or a decompression type backflow preventer is provided at a branch portion from the mainstream passage 42. Preventive measures may be taken.

切替弁４４は、切替弁４４の上流側の主流通路４２の部分４２ａと下流側の主流通路４２の部分４２ｂとの連通を遮断すると共に副流通路４３と切替弁４４の下流側の主流通路４２の部分４２ｂとを連通する第１の状態と、切替弁４４の上流側の主流通路４２の部分４２ａと下流側の主流通路４２の部分４２ｂとを連通すると共に副流通路４３と切替弁４４の下流側の主流通路４２の部分４２ｂとの連通を遮断する第２の状態とに切替え可能である。そして、切替弁４４は、常時は第２の状態に存し、通電時に第１の状態に切替えられる。 The switching valve 44 cuts off communication between the portion 42a of the mainstream passage 42 on the upstream side of the switching valve 44 and the portion 42b of the mainstream passage 42 on the downstream side, and the sidestream passage 43 and the mainstream passage 42 on the downstream side of the switching valve 44. The first state of communicating with the portion 42b of the above, and the portion 42a of the mainstream passage 42 on the upstream side of the switching valve 44 and the portion 42b of the mainstream passage 42 on the downstream side are communicated with each other and the sidestream passage 43 and the switching valve 44. It is possible to switch to a second state in which communication with the portion 42b of the mainstream passage 42 on the downstream side is cut off. Then, the switching valve 44 always exists in the second state, and is switched to the first state when the power is turned on.

処理剤供給装置４の制御手段たるコントローラ９は、上述した洗浄運転の前に、給水弁４１を閉弁させると共に切替弁４４を第１の状態に切替えた状態でポンプ４５１を駆動して、貯蔵タンク４０から切替弁４４の下流側の主流通路４２の部分４２ｂに向けて所定量の洗剤を吸い出す吸い出し運転と、給水弁４１を開弁させると共に切替弁４４を第２の状態に切替えて、吸い出し運転で吸い出された所定量の洗剤を主流通路４２を介して水と共に洗浄槽２に送り出す送り出し運転とを実行する。この送り出し運転は、洗浄槽２に供給された水量が予め定められた規定の水量の到達し、洗浄槽２内の水位が上記所定水位になってこれを水位検知装置６が検知したときに終了する。 The controller 9, which is the control means of the treatment agent supply device 4, drives and stores the pump 451 in a state where the water supply valve 41 is closed and the switching valve 44 is switched to the first state before the cleaning operation described above. A suction operation for sucking out a predetermined amount of detergent from the tank 40 toward the portion 42b of the mainstream passage 42 on the downstream side of the switching valve 44, and a suction operation in which the water supply valve 41 is opened and the switching valve 44 is switched to the second state to suck out. A predetermined amount of detergent sucked out by the operation is sent out to the washing tank 2 together with water through the mainstream passage 42. This sending operation ends when the amount of water supplied to the washing tank 2 reaches a predetermined predetermined amount of water, the water level in the washing tank 2 reaches the predetermined water level, and the water level detecting device 6 detects this. do.

ここで、送り出し運転時にポンプ４５を駆動することも可能であるが、省エネとポンプ４５１の寿命アップとを図るには、送り出し運転時にポンプ４５１を非駆動とすることが望ましい。但し、送り出し運転時に、ポンプ４５１を、ポンプ４５１での圧力損失が大きくなる状態（ポンプ４５１の押し出し工程のストロークエンドに近い状態）で、駆動せずに待機させたのでは、バイパス路４６に水が流れやすくなって、主流通路４２に流れる水量が減少し、吸い出し運転時に主流通路４２に吸い出された所定量の処理剤を洗浄槽２に効率よく送り出せなくなってしまう。 Here, although it is possible to drive the pump 45 during the delivery operation, it is desirable that the pump 451 is not driven during the delivery operation in order to save energy and extend the life of the pump 451. However, if the pump 451 is made to stand by without being driven in a state where the pressure loss in the pump 451 becomes large (a state close to the stroke end of the extrusion process of the pump 451) during the delivery operation, water is supplied to the bypass passage 46. The amount of water flowing into the mainstream passage 42 decreases, and a predetermined amount of the treatment agent sucked into the mainstream passage 42 during the suction operation cannot be efficiently pumped to the cleaning tank 2.

そこで、本実施形態では、送り出し運転時に、ポンプ４５１を、ポンプ４５１での圧力損失が切替弁４４或いは第１や第２の逆止弁４５２，４５４といった主流通路４２の最小断面積部での圧力損失以下になる状態、例えば、ポンプ４５１の吸込み工程のストロークエンドに近い状態（図２に示す状態）で、駆動せずに待機させるようにした。 Therefore, in the present embodiment, during the delivery operation, the pressure loss in the pump 451 is the pressure in the minimum cross-sectional area of the mainstream passage 42 such as the switching valve 44 or the first and second check valves 452 and 454. In a state where the loss is less than or equal to, for example, a state close to the stroke end of the suction process of the pump 451 (a state shown in FIG. 2), the pump is made to stand by without being driven.

これによれば、送り出し運転時に駆動せずに待機するポンプ４５１での圧力損失は、主流通路４２の最小断面積部での圧力損失以下となるため、バイパス路４６に水が流れやすくなることはなく、主流通路４２に流れる水の流量は最小断面積部で律速される流量以下にはならない。従って、送り出し運転時にポンプ４５１を非駆動とするにも拘らず、吸い出し運転で主流通路４２に吸い出された所定量の処理剤を効率よく洗浄槽２に送り出すことができる。 According to this, the pressure loss in the pump 451 that stands by without being driven during the delivery operation is less than the pressure loss in the minimum cross-sectional area of the mainstream passage 42, so that it is easy for water to flow in the bypass path 46. Therefore, the flow rate of water flowing in the mainstream passage 42 does not become less than the flow rate regulated by the minimum cross-sectional area. Therefore, although the pump 451 is not driven during the delivery operation, a predetermined amount of the treatment agent sucked into the mainstream passage 42 in the suction operation can be efficiently delivered to the cleaning tank 2.

次に、図３に示す本発明の第２実施形態の処理剤供給装置４について説明する。図２に示す上記第１実施形態の処理剤供給装置４と同様の部材、部位に上記と同一の符号を付している。第２実施形態の処理剤供給装置４の第１実施形態のものとの相違点は、吸い出しユニット４５が、切替弁４４の上流側の主流通路４２の部分４２ａと切替弁４４の下流側の主流通路４２の部分４２ｂとを接続するように設けられたバイパス路４６に介設されることと、切替弁４４が、切替弁４４の上流側の主流通路４２の部分４２ａと下流側の主流通路４２の部分４２ｂとの連通を遮断すると共に副流通路４３と切替弁４４の上流側の主流通路４２の部分４２ａとを連通する第１の状態と、切替弁４４の上流側の主流通路４２の部分４２ａと下流側の主流通路４２の部分４２ｂとを連通すると共に副流通路４３と切替弁４４の上流側の主流通路４２の部分４２ａとの連通を遮断する第２の状態とに切替え可能であることである。 Next, the treatment agent supply device 4 of the second embodiment of the present invention shown in FIG. 3 will be described. The same members and parts as those of the treatment agent supply device 4 of the first embodiment shown in FIG. 2 are designated by the same reference numerals as those described above. The difference between the treatment agent supply device 4 of the second embodiment and that of the first embodiment is that the suction unit 45 has a mainstream portion 42a of the mainstream passage 42 on the upstream side of the switching valve 44 and a mainstream on the downstream side of the switching valve 44. It is interposed in a bypass passage 46 provided to connect the portion 42b of the passage 42, and the switching valve 44 is provided between the portion 42a of the mainstream passage 42 on the upstream side of the switching valve 44 and the mainstream passage 42 on the downstream side. The first state in which the sidestream passage 43 and the portion 42a of the mainstream passage 42 on the upstream side of the switching valve 44 are communicated with each other while blocking the communication with the portion 42b, and the portion of the mainstream passage 42 on the upstream side of the switching valve 44. It is possible to switch to a second state in which the 42a and the portion 42b of the mainstream passage 42 on the downstream side are communicated with each other and the communication between the side flow passage 43 and the portion 42a of the mainstream passage 42 on the upstream side of the switching valve 44 is cut off. That is.

第２実施形態のものでは、給水弁４１を閉弁させると共に切替弁４４を第１の状態に切替えた状態でポンプ４５１を駆動して、貯蔵タンク４０から切替弁４４の上流側の主流通路４２の部分４２ａに向けて所定量の洗剤を吸い出す吸い出し運転と、給水弁４１を開弁させると共に切替弁４４を第２の状態に切替え、ポンプ４５１を非駆動として、吸い出し運転で吸い出された所定量の洗剤を主流通路４２を介して水と共に洗浄槽２に送り出す送り出し運転とを実行するようにしている。 In the second embodiment, the pump 451 is driven in a state where the water supply valve 41 is closed and the switching valve 44 is switched to the first state, so that the mainstream passage 42 on the upstream side of the switching valve 44 from the storage tank 40 is driven. A suction operation for sucking out a predetermined amount of detergent toward the portion 42a, a place where the water supply valve 41 is opened and the switching valve 44 is switched to the second state, the pump 451 is not driven, and the suction operation is performed. A pumping operation is performed in which a fixed amount of detergent is pumped to the washing tank 2 together with water through the mainstream passage 42.

尚、切替弁４４の上流側の主流通路４２の部分４２ａには、吸い出し運転で吸い出された洗剤を貯留する貯留部４２１が設けられている。そして、吸い出し運転時に、吸い出しユニット４５にまで洗剤が到達しないようにしている。但し、貯留部４２１を設ける代わりに切替弁４４の上流側の主流通路４２の部分４２ａの長さを長くし、吸い出しユニット４５にまで洗剤が到達しないようにすることも可能である。 A storage section 421 for storing the detergent sucked out by the sucking operation is provided in the portion 42a of the mainstream passage 42 on the upstream side of the switching valve 44. Then, during the suction operation, the detergent is prevented from reaching the suction unit 45. However, instead of providing the storage portion 421, it is possible to increase the length of the portion 42a of the mainstream passage 42 on the upstream side of the switching valve 44 so that the detergent does not reach the suction unit 45.

ここで、送り出し運転時に、ポンプ４５１を、ポンプ４５１での圧力損失が小さくなる状態（ポンプ４５１の吸い込み工程のストロークエンドに近い状態）で、駆動せずに待機させたのでは、バイパス路４６に水が流れやすくなり、主流通路４２に流れる水量が減少し、吸い出し運転時に主流通路４２に吸い出された所定量の処理剤を洗浄槽２に効率よく送り出せなくなってしまう。 Here, if the pump 451 is made to stand by without being driven in a state where the pressure loss in the pump 451 is small (a state close to the stroke end of the suction process of the pump 451) during the delivery operation, the bypass passage 46 is used. The water becomes easier to flow, the amount of water flowing into the mainstream passage 42 decreases, and a predetermined amount of the treatment agent sucked into the mainstream passage 42 during the suction operation cannot be efficiently pumped to the cleaning tank 2.

そこで、第２実施形態では、送り出し運転時に、ポンプ４５１を、ポンプ４５１での圧力損失が切替弁４４といった主流通路４２の最小断面積部での圧力損失以上になる状態、例えば、ポンプ４５１の押し出し工程のストロークエンドに近い状態（図３に示す状態）で、駆動せずに待機させるようにした。 Therefore, in the second embodiment, the pump 451 is pushed out in a state where the pressure loss in the pump 451 is equal to or greater than the pressure loss in the minimum cross-sectional area of the mainstream passage 42 such as the switching valve 44, for example, the pump 451 is pushed out. The state near the stroke end of the process (the state shown in FIG. 3) was set to stand by without driving.

これによれば、送り出し運転時に駆動せずに待機するポンプ４５１での圧力損失は、主流通路４２の最小断面積部での圧力損失以上となるため、吸い出しユニット４５を介設したバイパス路４６に水が流れやすくなることはなく、主流通路４２に流れる水の流量は最小断面積部で律速される流量以下にはならない。従って、送り出し運転時にポンプ４５１を非駆動とするにも拘らず、吸い出し運転で主流通路４２に吸い出された所定量の処理剤を効率よく洗浄槽２に送り出すことができる。 According to this, the pressure loss in the pump 451 that stands by without being driven during the feeding operation is greater than the pressure loss in the minimum cross-sectional area of the mainstream passage 42, so that the bypass path 46 having the suction unit 45 interposed therebetween The flow rate of water does not become easy to flow, and the flow rate of water flowing in the mainstream passage 42 does not become less than the flow rate regulated by the minimum cross-sectional area. Therefore, although the pump 451 is not driven during the delivery operation, a predetermined amount of the treatment agent sucked into the mainstream passage 42 in the suction operation can be efficiently delivered to the cleaning tank 2.

以上、本発明の実施形態について図面を参照して説明したが、本発明はこれに限定されない。例えば、上記実施形態の食器洗浄機は、乾燥ファン８を備える乾燥機能付きの食器洗浄機であるが、乾燥機能の無い食器洗浄機であってもよい。また、上記実施形態の処理剤供給装置４は、食器洗浄機の被供給部たる洗浄槽２に処理剤たる洗剤を供給するものであるが、処理剤たるリンスを供給するものであってもよい。また、他の用途、例えば、洗濯機の被供給部たる洗濯槽に処理剤たる洗剤や柔軟剤を供給する処理剤供給装置にも同様に本発明を適用できる。 Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, the dishwasher of the above embodiment is a dishwasher with a drying function provided with a drying fan 8, but may be a dishwasher without a drying function. Further, although the treatment agent supply device 4 of the above embodiment supplies the detergent as the treatment agent to the washing tank 2 which is the supplied portion of the dishwasher, it may supply the rinse as the treatment agent. .. Further, the present invention can be similarly applied to other uses, for example, a treatment agent supply device for supplying a detergent or a softener as a treatment agent to a washing tub which is a supply unit of a washing machine.

２…洗浄槽（被供給部）、４…処理剤供給装置、４０…貯蔵タンク、４１…給水弁、４２…主流通路、４２ａ…切替手段の上流側の主流通路の部分、４２ｂ…切替手段の下流側の主流通路の部分、４３…副流通路、４４…切替弁（切替手段）、４５…吸い出しユニット、４５１…ポンプ、４５２…第１逆止弁、４５３…流入路、４５４…第２逆止弁、４５５…流出路、４６…バイパス路、９…コントローラ（制御手段）。 2 ... Cleaning tank (supplied part), 4 ... Treatment agent supply device, 40 ... Storage tank, 41 ... Water supply valve, 42 ... Mainstream passage, 42a ... Mainstream passage portion on the upstream side of the switching means, 42b ... Switching means Downstream mainstream passage, 43 ... sidestream passage, 44 ... switching valve (switching means), 45 ... suction unit, 451 ... pump, 452 ... first check valve, 453 ... inflow path, 454 ... second reverse Stop valve, 455 ... Outflow path, 46 ... Bypass path, 9 ... Controller (control means).

Claims (3)

処理剤の貯蔵タンクから吸い出した所定量の処理剤を水と共に被供給部に供給可能な処理剤供給装置であって、
被供給部に水を供給する、上流端に給水弁が設けられた主流通路と、貯蔵タンクに貯蔵された処理剤を主流通路に導入する副流通路と、主流通路と副流通路との合流部に配設された切替手段と、処理剤の吸い出しユニットと、制御手段とを備え、
吸い出しユニットは、容積式のポンプと、ポンプに吸い込まれる流れのみを許容する第１逆止弁と、第１逆止弁とポンプとの間の流入路と、ポンプから押し出される流れのみを許容する第２逆止弁と、ポンプと第２逆止弁との間の流出路とで構成されて、切替手段の下流側の主流通路の部分に吸い出しユニットが介設されると共に、切替手段の上流側の主流通路の部分と吸い出しユニットの下流側の主流通路の部分とを接続するバイパス路が設けられ、
切替手段は、切替手段の上流側の主流通路の部分と下流側の主流通路の部分との連通を遮断すると共に副流通路と切替手段の下流側の主流通路の部分とを連通する第１の状態と、切替手段の上流側の主流通路の部分と下流側の主流通路の部分とを連通すると共に副流通路と切替手段の下流側の主流通路の部分との連通を遮断する第２の状態とに切替え可能であり、
制御手段は、給水弁を閉弁させると共に切替手段を第１の状態に切替えた状態でポンプを駆動して、貯蔵タンクから切替手段の下流側の主流通路の部分に向けて所定量の処理剤を吸い出す吸い出し運転と、給水弁を開弁させると共に切替手段を第２の状態に切替えて、吸い出し運転で吸い出された所定量の処理剤を主流通路を介して水と共に被供給部に送り出す送り出し運転とを実行するように構成されるものにおいて、
制御手段は、送り出し運転時に、ポンプを、ポンプでの圧力損失が主流通路の最小断面積部での圧力損失以下になる状態で、駆動せずに待機させる制御を行うように構成されることを特徴とする処理剤供給装置。 A treatment agent supply device capable of supplying a predetermined amount of treatment agent sucked out from a treatment agent storage tank together with water to a unit to be supplied.
A mainstream passage that supplies water to the supplied section and has a water supply valve at the upstream end, a sidestream passage that introduces the treatment agent stored in the storage tank into the mainstream passage, and a confluence of the mainstream passage and the sidestream passage. It is provided with a switching means arranged in the portion, a suction unit for a treatment agent, and a control means.
The suction unit allows only the positive displacement pump, the first check valve that allows only the flow sucked into the pump, the inflow path between the first check valve and the pump, and the flow that is pushed out of the pump. It is composed of a second check valve and an outflow path between the pump and the second check valve, and a suction unit is interposed in the mainstream passage on the downstream side of the switching means, and is upstream of the switching means. A bypass path is provided to connect the mainstream passage portion on the side and the mainstream passage portion on the downstream side of the suction unit.
The switching means is a first type that blocks communication between the mainstream passage portion on the upstream side of the switching means and the mainstream passage portion on the downstream side, and communicates between the sidestream passage and the mainstream passage portion on the downstream side of the switching means. A second state in which the state communicates with the portion of the mainstream passage on the upstream side of the switching means and the portion of the mainstream passage on the downstream side, and the communication between the sidestream passage and the portion of the mainstream passage on the downstream side of the switching means is cut off. Can be switched to
The control means drives the pump with the water supply valve closed and the switching means switched to the first state, and a predetermined amount of the treatment agent is directed from the storage tank toward the mainstream passage on the downstream side of the switching means. The sucking operation and the water supply valve are opened and the switching means is switched to the second state, and the predetermined amount of the treatment agent sucked out in the sucking operation is sent out to the supplied portion together with the water through the mainstream passage. In what is configured to perform driving
The control means is configured to control the pump to stand by without being driven in a state where the pressure loss in the pump is equal to or less than the pressure loss in the minimum cross-sectional area of the mainstream passage during the delivery operation. A characteristic treatment agent supply device. 処理剤の貯蔵タンクから吸い出した所定量の処理剤を水と共に被供給部に供給可能な処理剤供給装置であって、
被供給部に水を供給する、上流端に給水弁が設けられた主流通路と、貯蔵タンクに貯蔵された処理剤を主流通路に導入する副流通路と、主流通路と副流通路との合流部に配設された切替手段と、処理剤の吸い出しユニットと、制御手段とを備え、
吸い出しユニットは、容積式のポンプと、ポンプに吸い込まれる流れのみを許容する第１逆止弁と、第１逆止弁とポンプとの間の流入路と、ポンプから押し出される流れのみを許容する第２逆止弁と、ポンプと第２逆止弁との間の流出路とで構成されて、切替手段の上流側の主流通路の部分と切替手段の下流側の主流通路の部分とを接続するように設けられたバイパス路に吸い出しユニットが介設され、
切替手段は、切替手段の上流側の主流通路の部分と下流側の主流通路の部分との連通を遮断すると共に副流通路と切替手段の上流側の主流通路の部分とを連通する第１の状態と、切替手段の上流側の主流通路の部分と下流側の主流通路の部分とを連通すると共に副流通路と切替手段の上流側の主流通路の部分との連通を遮断する第２の状態とに切替え可能であり、
制御手段は、給水弁を閉弁させると共に切替手段を第１の状態に切替えた状態でポンプを駆動して、貯蔵タンクから切替手段の上流側の主流通路の部分に向けて所定量の処理剤を吸い出す吸い出し運転と、給水弁を開弁させると共に切替手段を第２の状態に切替えて、吸い出し運転で吸い出された所定量の処理剤を主流通路を介して水と共に被供給部に送り出す送り出し運転とを実行するように構成されるものにおいて、
制御手段は、送り出し運転時に、ポンプを、ポンプでの圧力損失が主流通路の最小断面積部での圧力損失以上になる状態で、駆動せずに待機させる制御を行うように構成されることを特徴とする処理剤供給装置。 A treatment agent supply device capable of supplying a predetermined amount of treatment agent sucked out from a treatment agent storage tank together with water to a unit to be supplied.
A mainstream passage that supplies water to the supplied section and has a water supply valve at the upstream end, a sidestream passage that introduces the treatment agent stored in the storage tank into the mainstream passage, and a confluence of the mainstream passage and the sidestream passage. It is provided with a switching means arranged in the portion, a suction unit for a treatment agent, and a control means.
The suction unit allows only the positive displacement pump, the first check valve that allows only the flow sucked into the pump, the inflow path between the first check valve and the pump, and the flow that is pushed out of the pump. It is composed of a second check valve and an outflow path between the pump and the second check valve, and connects a portion of the mainstream passage on the upstream side of the switching means and a portion of the mainstream passage on the downstream side of the switching means. A suction unit is installed in the bypass path provided so as to
The switching means first blocks communication between the upstream mainstream passage portion of the switching means and the downstream mainstream passage portion, and communicates the sidestream passage with the upstream mainstream passage portion of the switching means. A second state in which the state communicates with the portion of the mainstream passage on the upstream side of the switching means and the portion of the mainstream passage on the downstream side, and the communication between the sidestream passage and the portion of the mainstream passage on the upstream side of the switching means is cut off. Can be switched to
The control means drives the pump with the water supply valve closed and the switching means switched to the first state, and a predetermined amount of the treatment agent is directed from the storage tank toward the mainstream passage portion on the upstream side of the switching means. The sucking operation and the water supply valve are opened and the switching means is switched to the second state, and the predetermined amount of the treatment agent sucked out in the sucking operation is sent out to the supplied portion together with the water through the mainstream passage. In what is configured to perform driving
The control means is configured to control the pump to stand by without being driven in a state where the pressure loss in the pump is equal to or greater than the pressure loss in the minimum cross-sectional area of the mainstream passage during the delivery operation. A characteristic treatment agent supply device. 食器類を収納する洗浄槽を備える食器洗浄機であって、処理剤たる洗剤の貯蔵タンクから吸い出した所定量の洗剤を水と共に被供給部たる洗浄槽に供給可能な処理剤供給装置を備えるものにおいて、処理剤供給装置が請求項１又は２記載の処理剤供給装置で構成されることを特徴とする食器洗浄機。 A dishwasher equipped with a washing tank for storing tableware, which is equipped with a treatment agent supply device capable of supplying a predetermined amount of detergent sucked out from a storage tank for detergent as a treatment agent to the washing tank as a supply unit together with water. A dishwasher comprising the treatment agent supply device according to claim 1 or 2.
JP2020161362A 2020-09-25 2020-09-25 Treatment agent feeder and dishwasher Pending JP2022054273A (en)

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