JP2005237405A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher that corrects irregularities in the quantity of water supplied due to a change in the hydraulic pressure of water supply and secures washing performance and running costs as intended. <P>SOLUTION: The dishwasher is equipped with a washing tub 1, a washing nozzle 4 arranged in the washing tub 1, a water level sensor 11 to sense a prescribed water level in the washing tub 1 and a feed valve 10 to feed water to the washing tub 1. With the prescribed water level set as a water level during a rinsing operation, the dishwasher performs water replenishment to replenish with water to increase the water level to the prescribed water level during a washing operation, temporarily stops the washing operation after an elapse of prescribed time from the start of the washing operation, senses the arrival of washing water to the prescribed water level by the water level sensor 11 and repeats water replenishment whether the prescribed water level has not be obtained or not, and corrects irregularities in the water quantity of replenishment due to a difference in the hydraulic pressure of water supply or irregularities in the water level due to the quantity or the shapes of dishes to be washed and secures washing performance and running costs as intended by the requisite minimum quantity of washing water. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a dishwasher for cleaning dishes by jetting washing water with a washing nozzle.

  Conventionally, this type of dishwasher reduces the amount of water used and reduces running costs, focusing on the fact that normal operation is possible with less water during the rinse operation than during the wash operation. By setting a reference water level and providing a replenishment water stroke for replenishing water at the reference water level during the cleaning operation, the amount of water during the rinsing operation was made smaller than the amount of water during the cleaning operation.

  An example of the conventional dishwasher will be described with reference to FIG.

  The washing tub 1 has an opening 2 in the front, and the opening 2 is opened and closed by a door 3, and a rotatable nozzle 4 for injecting washing water therein and a table basket 6 for storing tableware 5 are arranged. Has been. The washing water in the washing tank 1 is warmed by the heater 7, pumped to the nozzle 4 by the washing pump 8, sprayed toward the dishes 5, and circulated to wash the dishes 5. . When the washing process is finished, the washing water is discharged out of the machine by the drain pump 9. A water supply valve 10 is a water supply means that opens and closes the supply of cleaning water to the cleaning tank 1 by opening and closing it. 11 is a water level detection device for detecting whether or not the water level in the cleaning tank 1 has reached a predetermined water level. A control device 12 controls the heater 7, the cleaning pump 8, the drainage pump 9, the water supply valve 10, the water level detection device 11, and the like.

  About the dishwasher comprised as mentioned above, the operation | movement is demonstrated below.

  When the tableware 5 is set in the tableware basket 6, the detergent is introduced, and the operation is started, water is supplied from the water supply valve 10 into the washing tank 1 until the water level detection device 11 detects that the water level has reached a predetermined level. . When the predetermined water level is reached, the water supply is temporarily stopped, and then the replenishment water for supplying water for a predetermined time is executed. When this replenishment water is finished, the cleaning pump 8 and the heater 7 are energized. 4 is sprayed toward the tableware 5 to clean the tableware 5.

When the washing process is completed, the drainage pump 9 is energized and the washing water is discharged out of the machine. Next, water is supplied from the water supply valve 10 into the washing tank 1 until the water level detection device 11 newly detects that the water level has reached a predetermined water level. When this water supply is completed, the washing pump 8 is activated and the rinsing process is executed. Is done. As described above, the water level during the cleaning process is set to be higher than the water level during the rinsing process (see, for example, Patent Document 1).
JP 2001-57957 A

  However, in such a conventional dishwasher, the replenishing water for the washing operation is performed by opening the water supply valve 10 for a predetermined time. If the amount of water is slightly increased or the cleaning operation is started, the water in the cleaning tank 1 adheres to the dishes 5 and the cleaning tank 1. When the water level during operation has become low, the original effect of makeup water cannot be obtained, and there has been a problem that air stains are generated during the cleaning operation and the cleaning power is reduced. Further, if the amount of makeup water is set to be large in order to avoid such a decrease in cleaning power, there is a problem that the amount of water used is increased more than necessary and the running cost is increased.

  The present invention solves the above-described conventional problems, and corrects variations in the amount of makeup water due to differences in supply water pressure, etc., and variations in the water level during cleaning operations due to the amount and shape of dishes to be cleaned. The purpose is to provide a dishwasher that can ensure the washing performance and running cost.

  In order to solve the above-described conventional problems, the dishwasher of the present invention includes a washing tank, a washing nozzle disposed in the washing tank, a washing pump that pumps washing water to the washing nozzle, and the inside of the washing tank. A water level detecting device for detecting the predetermined water level and a water supply means for supplying water into the cleaning tank, wherein the predetermined water level is a water level during the rinsing operation, and water is set to be higher than the predetermined water level during the cleaning operation. The replenishing water is replenished, the cleaning operation is temporarily stopped after a predetermined time from the start of the cleaning operation, and the water level detection device detects whether or not the cleaning water has reached the predetermined water level. In this case, it is necessary to replenish the replenishment water, and it is possible to correct the variation in the amount of replenishment water due to differences in the feed water pressure, etc., and the variation in water level during the washing operation due to the amount and shape of the dishes to be washed. Minimal Cleaning performance of the target street water purification, it is possible to provide a dishwasher capable of securing the running cost.

  The dishwasher of the present invention compensates for variations in the amount of makeup water due to differences in the supply water pressure, etc., and variations in the water level during washing operations due to the amount and shape of the dishes to be cleaned, ensuring performance and running costs as targeted. A dishwasher that can be realized.

  The first invention includes a cleaning tank, a cleaning nozzle disposed in the cleaning tank, a cleaning pump that pumps cleaning water to the cleaning nozzle, and a water level detection device that detects a predetermined water level in the cleaning tank, And a water supply means for supplying water into the cleaning tank, wherein the predetermined water level is set to a water level at the time of the rinsing operation, and replenishing water for supplying water so as to be higher than the predetermined water level at the time of the cleaning operation is executed, After a predetermined time has elapsed from the start of operation, the cleaning operation is temporarily stopped, and the water level detection device detects whether or not the cleaning water has reached the predetermined water level.If not, the replenishing water is executed again. It is possible to compensate for variations in the amount of makeup water due to differences in supply water pressure, etc., and variations in the water level during washing operations due to the amount and shape of dishes to be washed. , Running It is possible to provide a dishwasher that can secure the door.

  In the second invention, in particular, the water level detection by the water level detection device performed after a predetermined time has elapsed from the start of the cleaning operation of the first invention and the execution of makeup water based on the result are performed a plurality of times. The amount of water used can be ensured with high accuracy, and reliability can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
The configuration of the dishwasher in the first embodiment of the present invention is the same as that of the conventional example, and only the operation method is different. Therefore, the present embodiment will be described with reference to the flowchart showing the operation of the dishwasher shown in FIG. . Therefore, the same parts as those in the conventional example are denoted by the same reference numerals and the description thereof is omitted.

  In FIG. 1, when the tableware 5 is set in the tableware basket 6, the detergent is introduced, and the operation is started, the water supply is water supply means until the control device 12 detects that the water level detection device 11 has reached a predetermined water level. Water is supplied from the valve 10 into the washing tank 1. When the predetermined water level is reached, the water supply is stopped once, and then the makeup water for supplying water for a predetermined time is executed. When this makeup water is finished, the cleaning operation starts together with the operation of the cleaning pump 8. After the cleaning operation is performed for a predetermined time, the operation is temporarily stopped, and the water level detection device 11 detects again whether the water has reached the predetermined water level. In this case, the replenishing water that supplies water for a predetermined time is executed again, and then the cleaning operation is performed.

  When the cleaning process is completed, the drainage pump 9 is energized and the cleaning water is discharged outside the apparatus. Next, water is supplied from the water supply valve 10 into the cleaning tank 1 until the water level detection device 11 newly detects a predetermined water level. When this water supply is completed, the cleaning pump 8 is activated and the rinsing process is executed.

  As described above, according to the present embodiment, it is possible to correct variations in the amount of makeup water due to differences in the supply water pressure and the like, and variations in the water level during the cleaning operation due to the amount and shape of the dishes 5 to be cleaned. Therefore, it is possible to provide a dishwasher that achieves the desired cleaning performance with the minimum required amount of washing water and does not increase the running cost.

  In the above embodiment, the water level is detected only once after performing the cleaning operation for a predetermined time. However, if the cleaning operation and the water level detection for a predetermined time are repeated a plurality of times, the amount of makeup water is supplied. Needless to say, the accuracy can be ensured and the reliability can be improved.

  As described above, the dishwasher according to the present invention can cope with variations in the amount of makeup water due to differences in supply water pressure, etc., and variations in the water level during washing operations due to the amount and shape of dishes to be washed. In addition, it can ensure stable washing performance and proper running cost, and can be applied to household and commercial dishwashers and washing equipment.

The flowchart which shows the driving | operation operation | movement of the dishwasher in Embodiment 1 of this invention. Side view of a conventional dishwasher

Explanation of symbols

1 Washing tank 4 Nozzle 8 Washing pump 9 Drainage pump 10 Water supply valve (water supply means)
11 Water level detection device 13 Control device

Claims (2)

To the cleaning tank, a cleaning nozzle arranged in the cleaning tank, a cleaning pump for pumping cleaning water to the cleaning nozzle, a water level detection device for detecting a predetermined water level in the cleaning tank, and the cleaning tank Water supply means for supplying water, wherein the predetermined water level is set to the water level during the rinsing operation, and replenishing water is supplied to replenish water so as to be higher than the predetermined water level during the cleaning operation, and a predetermined time from the start of the cleaning operation. A dishwasher that temporarily stops the washing operation after the lapse of time and detects whether or not the washing water has reached the predetermined water level by the water level detection device. The dishwasher according to claim 1, wherein water level detection by a water level detection device performed after a lapse of a predetermined time from the start of the washing operation and execution of makeup water based on the result are performed a plurality of times.

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