JP2005334343A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher capable of eliminating the influence of air entanglement as much as possible and transferring a fixed amount of water from a hot water tank to a washing tub within scheduled time. <P>SOLUTION: The dishwasher is provided with a hot water supply pump 6 which is driven on the basis of signals and transfers the water inside the hot water tank 3 to the washing tub 2 housing dishes, and a controller 200 which transmits the signals for stopping the drive of the hot water supply pump 6 once, twice or more during a water transfer process. Depending on cases, the stoppage time of at least one time among two or more times of stoppage is made shorter or longer than the other stoppage time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to operation control of a dishwasher. In particular, the present invention relates to drive control of a hot water supply pump for transferring hot water to a washing tank in a dishwasher equipped with a hot water storage tank outside the washing tank.

  In the conventional dishwasher, there is a type in which a heating means is provided in the washing tank and cleaning is performed while heating the hot water supplied in the washing tank. However, the tableware, chopsticks, etc. fall on the heating means and are heated. Can be dangerous. Therefore, there is a dishwasher equipped with a hot water storage tank that heats hot water (hereinafter referred to as water) in a hot water storage tank separate from the washing tank. In a dishwasher having such a configuration, water stored in a hot water storage tank is sent out to a washing tank by a hot water supply pump (hereinafter referred to as a hot water supply pump) (see, for example, Patent Document 1).

JP-A-6-327602 (FIGS. 1 and 2)

  However, in the dishwasher configured as described above, an air bit may be generated in a hot water supply pump for sending out (transferring) water. The air bite is a phenomenon in which a certain amount of water cannot be transferred because, for example, an impeller (rotary blade) that rotates inside the hot water supply pump entrains gas (bubbles) generated in water and turns idle. In some cases, 1/10 of the predetermined amount cannot be transferred. In particular, the higher the temperature of the water, the more easily gas is generated in the water, and the air bite becomes worse. Therefore, a dishwasher that handles high-temperature water tends to generate an air bite. When an air bite is generated, it becomes very difficult to transfer a predetermined amount of water to the washing tank in a predetermined time.

  Therefore, as described above, in the case of a dishwasher that stops the pumping pump and shifts to the next process (starting of the circulation pump) based on the water level of the washing tank, when the water transfer becomes impossible, It takes a very long time to reach the water level, and it becomes impossible to shift to the next treatment during that time. In addition, depending on the dishwasher, even when a predetermined amount of water is not transferred due to the air bag, when a predetermined time elapses, it is assumed that the predetermined amount of water has been transferred and the process moves to the next operation or process. Can happen.

  The present invention has been made to solve such a problem, and is designed to remove the influence of the air pocket as much as possible and to transfer a certain amount of water from the hot water storage tank to the washing tank within a predetermined time. The purpose is to provide a machine.

  The tableware washing machine according to the present invention is driven based on a signal, and stops driving the hot water supply pump that transfers water in the hot water storage tank to a cleaning tank that stores tableware, and one or more times during the transfer process. Control means for transmitting a signal to be transmitted.

  According to the present invention, the control means transmits a signal during the transfer process to stop driving the hot water pump one or more times, so that the gas (bubbles) generated in the hot water pump can be released. Can prevent air bite,

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating an example of a kitchen system in which the dishwasher according to the first embodiment of the present invention is housed. This kitchen system 100 includes a sink 101, a counter 102, and a sink unit 103. In this example, the counter 102 is provided with a dishwasher on the right side of the sink portion 103 so that the lid 26 on the upper surface can be opened and closed. An operation unit 27 for operating the dishwasher and making various settings is provided on the front surface of the dishwasher.

  FIG. 2 is a sectional view of the dishwasher according to the first embodiment as viewed from the side. FIG. 3 is a conceptual diagram of the dishwasher according to the present embodiment. 2 and 3, a washing tank 2 is provided in the body 1 of the dishwasher. In the dishwasher of the present embodiment, the heating means 7 is not provided in the cleaning tank 2, and the heating means 7 is provided in the hot water storage tank 3 separate from the cleaning tank 2. Therefore, the cleaning tank 2 can be easily cleaned.

  In the present embodiment, the hot water storage tank 3 is disposed on the front side of the machine body 1, and water from the outside such as tap water is supplied via the water supply pipe 4 and the water supply valve 5 connected to the hot water storage tank 3. Is supplied to the hot water storage tank 3. Since the hot water storage tank 3 is disposed on the front surface of the airframe 1, it can be easily replaced or repaired. The hot water storage tank 3 is for storing water to be transferred as cleaning water or rinsing water in the cleaning tank 2. Heating means 7 is provided in the hot water storage tank 3 to heat the water stored in the hot water storage tank 3 (which becomes washing water and rinsing water) to a temperature suitable for cleaning and rinsing. Moreover, it uses when heating the air sent to the ventilation means 12, and drying tableware. The temperature detection means 29 converts the temperature of the water in the hot water storage tank 3 into a signal and outputs it to a temperature determination means 204 described later.

  The hot water storage tank 3 is connected to the cleaning tank 2 through a hot water supply pipe 10 and a hot water supply pipe 11. A hot water supply pump 6 is connected between the hot water supply pipe 10 and the hot water supply pipe 11. When the hot water supply pump 6 is driven, the water in the hot water storage tank 3 is transferred to the cleaning tank 2 through the hot water supply pipe 10 and the hot water supply pipe 11. The operation of the hot water supply pump 6 and its operation control will be described later. Here, in the present embodiment, a water level detection means 8 and a water level detection means 9 for detecting two levels of water level are provided in the hot water storage tank 3.

  A concave hot water reservoir 21 is provided at the bottom of the cleaning tank 2. A filter 22 for collecting residue is provided at the upper opening of the hot water reservoir 21. In addition, the hot water reservoir 21 and the water supply port of the jet / drain pump 15 are connected via a water pipe 16. Further, the discharge port of the jet / drain pump 15 and the cleaning tank 2 are connected via a water pipe 17. Here, an injection nozzle 18 having a plurality of jet nozzles (not shown) is provided at the end of the water supply pipe 17 connected to the cleaning tank 2 so as to be positioned below the cleaning tank 2. The sent water is jetted. Thereby, the water transferred from the hot water storage tank 3 into the washing tank 2 is taken into the jet / drainage pump 15 via the hot water reservoir 21 and further sent to the washing tank 2 via the water supply pipe 17. 18 is sprayed to the tableware 19 accommodated in the washing tub 2 and further circulated by being accumulated in the hot water reservoir 21.

  Further, the hot water reservoir 21 and the combined jet / drain pump 15 are connected via a drain pipe 23. Further, the combined jet / drain pump 15 and the external drain pipe 25 are connected via the drain pipe 24. Thereby, at the time of drainage, the water in the washing tub 2 is taken in by the jet / drainage pump 15 through the hot water reservoir 21 and the drain pipe 23 and is passed through the drain pipe 24 to the external drain pipe 25 (outside the dishwasher). Drained.

  Here, in the washing tub 2, a tableware basket 20 on which the tableware 19 is placed is stored. The tableware 19 and the tableware basket 20 are opened to the washing tub 2 by opening the lid 26 on the upper surface. It can be taken in and out freely. Further, the body 1 is provided with a control device storage section (not shown) in which a control device 200 described later is stored.

  FIG. 4 is a block diagram showing an electrical system of the dishwasher in the first embodiment. This dishwasher is provided with a control device 200 that is configured by, for example, a microcomputer and serves as control means. The control device 200 includes at least a control unit 201, a storage unit 202, a timer unit 203, and a temperature determination unit 204.

  An input signal including various data is transmitted to the control unit 201 from at least the operation unit 27, the water level detection units 8 and 9, the timer unit 203, and the temperature determination unit 204. And based on various data, the display lamp drive means 206 which makes a user light the display lamp (not shown) for showing the situation of a process etc., blinks, extinguishes, etc., and the water supply valve which opens and closes the water supply valve 5 The driving means 207, the pump driving means 208 for feeding, draining and stopping the combined discharge and drainage pump 15, the blowing means driving means 209 for driving and stopping the blowing means 12, and the heating means driving means for heating and stopping the heating means 7. 210, a hot water supply pump driving means 211 for driving and stopping the hot water supply pump 6 is transmitted to each means in the corresponding dishwasher by sending a drive control signal including operation instruction data to perform drive control. Here, for example, the hot water supply pump driving unit 211 is configured by a switching device such as a transistor or a relay (relay), and performs drive control by controlling power supply to the hot water supply pump 6 based on a drive control signal. Since the drive control of the hot water supply pump 6 by the hot water supply pump driving means 211 is substantially performed only according to the drive control signal transmitted from the control unit 201, the control unit 201 controls the drive of the hot water supply pump 6 thereafter. It will be described as being performed. Further, the control unit 201 of the present embodiment has a counter 201A, and in this embodiment, at least the number of times of driving (water transfer) of the hot water supply pump 6 is counted (counted). Here, counting is performed by counting up, but the counting method is not particularly limited, and a method of counting down a predetermined count value may be used.

  The storage unit 202 temporarily or long-term stores a program for causing the control unit 201 to execute the operation of the dishwasher from the washing water preparation step to the drying step, data necessary for executing each step, and the like. Remember. The timer unit 203 measures time and manages process time and the like. Then, the temperature determination unit 204 determines the temperature of the water in the hot water storage tank 3 detected by the temperature detection unit 29 and transmits a signal including the data to the control unit 201.

  In the present embodiment, drive control of hot water supply pump 6 by control unit 201 performed via hot water supply pump drive means 211 will be described. When the hot water pump 6 transfers the hot water from the hot water storage tank 3 to the washing tank 2, the hot water pump 6 is provided with a stop time one or more times during the process in order to prevent air clogging that may occur in the hot water pump 6. While the gas generated in 6 is released, water is transferred intermittently. Here, although the hot water supply pump 6 having an impeller is targeted, the present invention can be applied to all types of pumps that may cause an air clog.

  FIG. 5 is a diagram showing the steps of the dishwasher. The dishwasher according to the present embodiment feeds water (wash water) to the hot water storage tank 3 and heats it to a temperature suitable for washing, and transfers the wash water in the hot water storage tank 3 to the wash tank 2. Washing water transfer step, washing step for washing tableware 19, rinse water preparation step for supplying water (rinse water) to hot water storage tank 3 and heating to appropriate temperature for rinsing, rinse water in hot water storage tank 3 for washing tank The rinsing water transfer process for transferring to 2, the rinsing process for rinsing, the drying process for drying the wet tableware 19, and the final draining process for finally draining the water in the washing tub 2 are classified. Here, since the rinse process is repeated three times, the rinse water preparation process and the rinse water transfer process are each repeated three times. Here, in the present embodiment, the transfer of the hot water supply pump 6 in the washing water transfer step and the rinse water transfer step (hereinafter collectively referred to as the water transfer step) will be described.

  FIG. 6 is a diagram showing the contents of the water transfer process. In FIG. 6, the transfer drive time of 5 seconds is provided 3 times and the drive stop time of 2 seconds is provided 2 times, and each water transfer step is a step of about 20 seconds. Here, the transfer drive time and the drive stop time are times when a drive control signal is transmitted from the control unit 201, respectively. Therefore, it may be different from the time during which the hot water supply pump 6 is actually driven to drive or stopped. Nevertheless, in the present embodiment, the drive stop time is set to 2 seconds, and it takes about 1 second until the hot water supply pump 6 (rotation of the impeller) stops, so the hot water supply pump 6 stops in this embodiment.

  FIG. 7 is a diagram illustrating processing of the control device 200 centering on the control unit 201 when performing the water transfer process. When the cleaning water preparation process, the cleaning process, or the rinsing process ends, the control unit 201 proceeds to the water transfer process. Here, the rinsing water preparation step described above is performed in parallel with the washing step or the rinsing step, and therefore the rinsing water transfer step of the water transfer step is shifted when the washing step or the rinsing step ends. Can do.

  When the water transfer process is started, the control unit 201 transmits a drive control signal to drive the hot water supply pump 6 to transfer water. At the same time, measurement of the transfer drive time by the timer unit 203 is also started (S1). It is determined whether or not the transfer drive time has passed a predetermined time (5 seconds in the present embodiment) (whether or not the predetermined time has been reached) by measurement by the timer unit 203 (S2). 6 is stopped. At the same time, the measurement of the drive stop time by the timer unit 203 is also started (S3). Then, the count of the counter (in this embodiment, the initial value is 1) is increased by 1 (S4), and the number of times the hot water supply pump 6 is driven is counted. Then, it is determined whether the counter has reached a predetermined number (3 in the present embodiment) (S5). If it is determined that the predetermined number has been reached, the count number of the counter 201A is returned to the initial value (S7), and the water transfer step is terminated.

  On the other hand, if it is determined that the counter has not reached the predetermined number, whether or not the drive stop time has passed a predetermined time (2 seconds in the present embodiment) by measurement by the timer unit 203 (whether or not the predetermined time has been reached). (S6), and if it is determined that the time has elapsed, the process returns to S1 to start driving the hot water supply pump 6. During this time, the rotation of the impeller in the hot water supply pump 6 also stops. At this time, the gas entrained in the rotating impeller leaves the impeller and escapes (escapes) from the hot water supply pipe 10 or 11 to the outside of the hot water supply pump 6. Therefore, it is possible to prevent the air bite.

  As described above, according to the first embodiment, during the water transfer step (washing water transfer step and rinse water transfer step), the transfer drive time and the drive stop time are provided, and the hot water supply pump (especially the impeller) Since the water transfer from the hot water storage tank 3 to the washing tank 2 is intermittently performed by a hot water supply pump 6 having a high temperature), the gas generated in the pump is removed while the hot water supply pump is stopped. By letting it out of the pump, it is possible to prevent air jamming.

Embodiment 2. FIG.
In the first embodiment described above, two stop times are provided during one water transfer step and each drive stop time is 2 seconds. However, the present invention is not limited to this. For example, a certain drive stop time may be shorter than other drive stop times at least once among a plurality of drive stop times. In this case, in the pump having the impeller, there is a high possibility that the stop position of the impeller can be changed. By changing the stop position, even a gas that has not left the impeller at a certain stop position can be easily separated.

  Conversely, at least one stop time may be longer than other stop times. If the time is long, the stop position of the impeller can be changed as in the case where the time is shortened, and further, a sufficient time is secured until the gas escapes from the hot water supply pipe 10 or 11 to the outside of the hot water supply pump 6. be able to.

Embodiment 3 FIG.
In the above-described embodiment, the transfer drive time and the drive stop time are provided, and the hot water supply pump 6 (rotation of the impeller) is completely stopped. However, the present invention is not limited to this. For example, instead of the drive stop time, the rotation speed is lower than the rotation speed of the impeller in the transfer drive time (the rotation speed that can release the gas caught in the impeller. 1/5 or less of the rotation speed in the transfer drive time , More preferably 1/10 or less), the hot water supply pump 6 may be driven at low speed. In this case, the hot water supply pump driving means 211 is constituted not by simple switching means but by means capable of controlling the rotation speed of the impeller.

It is a perspective view of the kitchen system in which the dishwasher which concerns on embodiment of this invention is accommodated. It is sectional drawing which looked at the dishwasher which concerns on embodiment of this invention from the side. It is a conceptual diagram of the dishwasher of one embodiment of this invention. It is a block diagram which shows the electrical system | strain of the dishwasher of Embodiment 1. FIG. It is a figure showing the content of a water transfer process. It is a figure showing the process of a dishwasher. It is a figure showing the process of the control apparatus 200 centering on the control part 201 at the time of performing a water transfer process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airframe, 2 Washing tank, 3 Hot water storage tank, 4 Water supply pipe, 5 Water supply valve, 6 Hot water supply pump, 7 Heating means, 8, 9 Water level detection means, 10, 11 Hot water supply pipe, 12 Blasting means, 15 Injection drainage combined use pump, 16, 17 Water supply pipe, 18 Injection nozzle, 19 Tableware, 20 Tableware basket, 21 Hot water reservoir, 22 Filter, 23, 24 Drainage pipe, 25 External water distribution pipe, 26 Lid, 27 Operation part, 29 Temperature detection means, 32 display lamp, 100 kitchen system, 101 sink, 102 counter, 103 sink, 200 control device (control means), 201 control section, 201A counter, 202 storage section, 203 timer section, 204 temperature determination means, 206 display lamp drive Means, 207 water supply valve driving means, 208 pump driving means, 209 air blowing means driving means, 210 heating means driving means, 211 Hot water pump drive means.

Claims (5)

A hot water pump that is driven based on the signal and transfers the water in the hot water storage tank to a washing tank containing the dishes;
A dishwasher comprising a control means for transmitting the signal for stopping the hot water supply pump one or more times during the transfer step. A hot water supply pump having a rotary blade for applying pressure to the water to be supplied, rotating the rotary blade based on a signal, and transferring the water in the hot water storage tank to a washing tank for storing tableware;
In each step involving the transfer of water, a dishwasher comprising: control means for transmitting the signal to rotate or stop the rotary blade to stop the hot water supply pump one or more times.   3. The dishwashing according to claim 1, wherein the controller is configured to make at least one drive stop time shorter than other drive stop times while stopping the hot water supply pump a plurality of times. Machine.   3. The dishwashing according to claim 1, wherein the controller is configured to make at least one drive stop time longer than other drive stop times while stopping the hot water supply pump a plurality of times. Machine. 5. The dishwashing apparatus according to claim 1, wherein the control means transmits a signal for performing low-speed driving with a water supply speed lower than normal instead of stopping the hot water supply pump. Machine.

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