JP2010162261A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher capable of providing uniform-density washing water with high concentration of a detergent in an early stage at a low water level, providing a jet of washing water from a washing nozzle with a high concentration of a detergent from the beginning, and effectively making the washing water work on dirt to attain higher washing effect. <P>SOLUTION: A control means 17 performs a detergent dissolving step for dissolving a charged detergent at the beginning of a washing step, and in the detergent dissolving step, it controls a water supply valve 12 in association with water level detecting means 14 to supply water to a water level lower than that in the step performed after the detergent dissolving step. The control means further controls a washing pump 9 to rotate forward and reverse directions. Uniform-density washing water with a high concentration of a detergent can be generated in an early stage at a low water level, and washing can be performed using washing water with a high concentration of a detergent from the beginning so that a higher washing effect can be obtained. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dishwasher for washing dishes by spraying wash water discharged from a washing pump from a washing nozzle toward dishes.

  Conventionally, this type of dishwasher has a standardized course that extends the washing time or raises the end temperature of the washing or heating rinsing process in order to wash dirty dishes such as cooking utensils. It is provided separately from the course, and the user can select a careful course or select a high-concentration washing course in which a high-concentration washing liquid is jetted to tableware at a lower water level than the standard course (for example, Patent Document 1). reference).

  Such a conventional dishwasher is configured as shown in FIGS. The configuration will be described below. As shown in FIG. 7, the cleaning tank 1 has an opening 2 in the front, and the opening 2 is opened and closed by a door 3, and a cleaning nozzle 4 for injecting cleaning water is rotatably provided therein. A table basket 6 for storing the tableware 5 is disposed in the washing tank 1. The cleaning tank 1 is supported by a frame 7.

  The washing water in the washing tank 1 is warmed by the heater 8, sucked from the drain port 10 having the residue filter 11 by the washing pump 9, pumped to the washing nozzle 4, ejected toward the dishes 5, and circulated. It is comprised so that it may wash by doing. The water supply valve 12 controls the supply of cleaning water to the cleaning tank 1. The drainage pump 13 is provided in the lower part of the washing tank 1 and discharges the washing water in the washing tank 1 to the outside of the machine. The water level detection means 14 detects the water level in the cleaning tank 1, and detects whether the water level in the cleaning tank 1 has reached a predetermined water level by detecting the water level in the auxiliary tank 15 communicated with the cleaning tank 1. Detect.

  The control device 24 is configured as shown in FIG. 8, and the control means 26 is constituted by a microcomputer or the like, and load control is performed according to the course set by the user from the input means 25 for setting the driving course and the like. The operation of the heater 8, the cleaning pump 9, the water supply valve 12, the drainage pump 13, the blower fan 20, etc. is controlled via the means 19, and a series of steps of cleaning, rinsing and drying are sequentially controlled.

  Here, the control means 26 detects the temperature of the cleaning water in the cleaning tank 1 by the thermistor 21 in close contact with the lower surface of the cleaning tank 1, and ends the cleaning process when the cleaning water temperature reaches a predetermined temperature. Reference numeral 22 denotes a power supply circuit for supplying a DC voltage to the control means 26, and reference numeral 23 denotes display means for performing a display operation.

  In the above-described configuration, the operation will be described for the case where the user selects a careful course in order to wash highly dirty dishes. The operation is performed in the order of a washing process, a rinsing process, a heating rinsing process, and a drying process. The cleaning process is divided into a cleaning process 1 and a cleaning process 2. 9 shows the operation unit of the input means 25, FIG. 10 shows the operation of the cleaning process 1, and FIG. 11 shows the operation of the cleaning process 2.

  In the cleaning process 1, the user sets the tableware 5 in the tableware basket 6, puts a predetermined amount of detergent, closes the door 3, turns on the power switch 25a of the input means 25, and makes the amount of the tableware 5 dirty. A suitable driving course is selected and set by the course setting switch 25d, and if necessary, the drying time after the heating rinsing process is set by the drying time setting switch 25c, and the operation is started by pressing the start button 25b. .

  When a careful course is set by the input means 25, in the cleaning process 1, when the operation is started in step 80 of FIG. 10, the water supply valve 12 is opened in step 81 to supply water to a predetermined water level, and in step 82, the cleaning pump 9 is intermittently operated to inject cleaning water from the cleaning nozzle 4 toward the dishes 5, and the heater 8 is intermittently energized to heat the cleaning water. When the elapsed time becomes equal to or longer than the predetermined time in step 83, the cleaning process 1 is finished, the process proceeds to step 84, and the process proceeds to the cleaning process 2.

  In the cleaning process 2, when the operation is started in Step 90 of FIG. 11, the water supply valve 12 is opened in Step 91 and additional water is supplied for a predetermined time. The water level is the same as the water level in the cleaning process of the standard course. The pump 9 is continuously operated to inject cleaning water from the cleaning nozzle 4 toward the dishes 5, and the heater 8 is energized continuously to heat the cleaning water.

  When the temperature of the washing water becomes equal to or higher than the predetermined temperature in step 93, the heater 8 is turned off in step 94. When the elapsed time exceeds the predetermined time in step 95, the process proceeds to step 96, the drain pump 13 is turned on to drain water, and the process proceeds to the next step in step 97.

Thereafter, a rinsing process and a heating rinsing process are performed, and the operation is finished through a drying process.
JP 2003-174994 A

  However, in such a conventional dishwasher, in such a case, it is necessary to bother the course to be selected against the dirt, so it has been convenient. Although it is possible to increase the detergent concentration, since the washing pump is rotated only in a certain direction, it takes time to dissolve the detergent and create a constant concentration of washing water. There was no means to spray water.

  The present invention solves the above-mentioned conventional problems, and at the beginning of the cleaning process, by providing a detergent dissolving process that rotates the detergent pump forward and backward at a level lower than the level of the subsequent process, an early stage at a low level. Because it can be used as washing water with a high detergent concentration and a constant density, when washing highly-stained items such as cooking utensils, the washing water sprayed from the washing nozzle can be used as washing water with a high washing concentration from the beginning. An object of the present invention is to provide a dishwasher that can effectively act against dirt and can obtain a higher cleaning effect.

  In order to achieve the above object, the present invention is configured so that the control means sequentially controls processes such as washing, rinsing and drying based on the setting of the input means for setting the operation course and the like. First, a detergent dissolution process for dissolving the introduced detergent is performed, and in the detergent dissolution process, the water supply means is controlled in conjunction with the water level detection means, and the water level of the process executed after the detergent dissolution process is exceeded. While supplying water to a low water level, it controls so that a washing pump may rotate forward and reverse.

  As a result, at the beginning of the cleaning process, by providing a detergent dissolution process that rotates the detergent pump forward and reverse at a level lower than the level of the subsequent process, the detergent concentration can be rapidly increased to a constant density at a low level. In the case of washing highly-stained items such as cooking utensils, it becomes possible for jet cleaning water from the cleaning nozzle to act effectively against dirt because the cleaning water has a high cleaning concentration from the beginning, A higher cleaning effect can be obtained.

The dishwasher of the present invention has a constant density with a high detergent concentration at an early stage at a low water level by providing a detergent dissolving process that rotates the detergent pump forward and reverse at a water level lower than the water level in the subsequent process at the beginning of the washing process. When washing highly-stained items such as cooking utensils, spray water from the cleaning nozzle can be used as cleaning water with a high cleaning concentration from the beginning. Therefore, a higher cleaning effect can be obtained.

  The first invention includes a cleaning tank for storing objects to be cleaned such as tableware, a cleaning nozzle for injecting cleaning water to the objects to be cleaned, a cleaning pump for pumping cleaning water to the cleaning nozzle, and the inside of the cleaning tank Water supply means for supplying water, water level detection means for detecting the water level in the cleaning tank, and control means for controlling the cleaning, rinsing, and drying processes, the control means at the beginning of the cleaning process , Executing a detergent dissolution process for dissolving the introduced detergent, and in the detergent dissolution process, controlling the water supply means in conjunction with the water level detection means to lower the water level of the process executed after the detergent dissolution process It is configured to supply water to the water level and to control the washing pump to rotate in the forward and reverse directions. At a low water level, the washing water can be made into a constant density with a high detergent concentration at an early stage. Dirty In the case of washing strong objects, the washing water jetted from the washing nozzle can be washed water having a high washing concentration from the beginning, so that it can act effectively against dirt, and a higher washing effect can be obtained. Obtainable.

  According to a second aspect, in the first aspect, the control means performs cleaning from the cleaning nozzle by intermittently performing an operation of rotating the cleaning pump in one direction without draining and supplying water after the detergent dissolution process. It is configured to execute the cleaning process 1 in which water is sprayed to clean the object to be cleaned. By not draining and supplying water after the detergent dissolution process, strong stains can be obtained at a high detergent concentration at the initial stage of cleaning. Can be cleaned. In addition, by intermittently rotating the cleaning pump in one direction, the phenomenon called air biting can be prevented even when the cleaning water level is low, and the cleaning power is reduced or abnormal noise is detected. Occurrence can be prevented.

  In a third aspect based on the second aspect, the control means performs additional water supply after the cleaning step 1 and injects cleaning water from the cleaning nozzle by continuously performing an operation of rotating the cleaning pump in one direction. The cleaning process 2 for cleaning the object to be cleaned is performed, and a large amount of cleaning water can be strongly sprayed onto the object to be cleaned, so that mechanically powerful cleaning is performed. Can do. In addition, it is possible to effectively prevent reattachment to tableware due to dirt components present in the wash water. Furthermore, by performing the final step of the cleaning step at a cleaning concentration lower than the cleaning step 1, it is possible to facilitate rinsing in the rinsing step that is the next step.

  According to a fourth aspect of the present invention, in the first to third aspects of the present invention, a detergent inlet is provided in the vicinity of the suction port of the cleaning pump, and mechanical power is supplied to the supplied water and detergent by driving the cleaning pump. Therefore, it is possible to make the washing water in which the detergent is dissolved more quickly and to prevent the detergent from being undissolved in the detergent dissolving process.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code | symbol, and abbreviate | omits description. Further, the present invention is not limited by the present embodiment.

(Embodiment 1)
As shown in FIGS. 1 and 2, the control device 16 includes an input unit 25 for setting an operation course and the like, and a microcomputer, and performs a process such as cleaning, rinsing, and drying based on the setting of the input unit 25. Control means 17 for sequentially controlling is provided. Here, the control means 17 controls the process in the order of the cleaning process, the rinsing process, the heating rinsing process, and the drying process.

  The cleaning process is divided into a detergent dissolving process, a cleaning process 1, and a cleaning process 2. The detergent dissolving process is lower than the water level in the cleaning process 2, and the operation of the cleaning pump 9 is rotated forward and backward in the detergent dissolving process. The detergent is dissolved sufficiently to produce a constant density washing water having a high detergent concentration, and the water level is shifted to the washing step 1, and the washing pump 9 is operated intermittently. Spray into tableware 5 In this cleaning step 1, the heater 8 is intermittently energized to heat the cleaning water.

  In the subsequent washing step 2, the washing water of the washing step 1 is not drained by the drain pump 13, but additional water is supplied, the washing pump 9 is continuously operated, and the dishes 5 are continuously washed with the washing water in which the detergent is dissolved. Wash. In the cleaning process 2, the heater 8 is energized continuously to heat the cleaning water.

  In the present embodiment, the course having the detergent dissolution process, the cleaning process 1 and the cleaning process 2 is described as the cleaning process. However, the cleaning process 2 may not be provided, and this case is referred to as a high concentration course. Call.

  The tableware basket 6 has a size capable of setting cooking utensils such as a frying pan, a ball, and a tama. In general, these cooking utensils have a larger amount of dirt such as oil stains and starch stains than ordinary dishes such as dishes, and are often sticky.

  In general, the cleaning ability depends on the concentration of the detergent, the heat of the cleaning water, the mechanical force by the cleaning water jet, and the like. In the course of the dishwasher according to the present invention, in particular, the concentration of the detergent is dissolved in the detergent dissolution process at an early stage to produce a high concentration cleaning liquid. In the cleaning process 1, the dishes are cleaned with a high concentration. By doing so, compared with the conventional standard course, the time for dissolving the detergent can be shortened, strong dirt can be removed quickly and effectively, and the cleaning performance can be greatly improved.

  The operation and action of the above configuration will be described. 3 shows the operation of the detergent dissolution process, FIG. 4 shows the operation of the cleaning process 1, and FIG. 5 shows the operation of the cleaning process 2. The user sets the tableware 5 in the tableware basket 6, puts a predetermined amount of detergent, closes the door 3, turns on the power switch 25a of the input means 25, and starts the operation by pressing the start button 25b. Is done.

  In the detergent dissolution process performed at the beginning of the cleaning process, when the operation is started at step 30 in FIG. 3, the water supply valve 12 is opened at step 31 to a predetermined water level set lower than the water level of the cleaning process 2 performed last. Water is supplied, and in step 32, the washing pump 9 is intermittently rotated alternately forward and reverse to stir the washing water and the detergent to dissolve the detergent, and the heater 8 is intermittently energized to heat the washing water.

  At this time, the cleaning pump 9 performs the operation of repeating the forward and reverse rotations intermittently for a short time, so that the detergent can be sufficiently dissolved in a shorter time than the case where the cleaning water flows in a constant direction and the uniform. Wash water in which a certain concentration of detergent is dissolved can be generated. Specifically, the cleaning pump 9 performs intermittent operation such as 2 seconds forward rotation-5 seconds stop-2 seconds reverse rotation-5 seconds stop so as to efficiently dissolve the detergent without causing so-called air chewing. It is suitable for making it.

  When the elapsed time exceeds the predetermined time in step 33, the detergent dissolution process is terminated and the process proceeds to the cleaning process 1.

In the cleaning process 1, when the operation is started in step 40 of FIG. 4, the water is not drained and the cleaning pump 9 is intermittently operated in one direction in step 41, and the cleaning water is directed toward the dishes 5 from the cleaning nozzle 4. And the cleaning water is heated by intermittently energizing the heater 8. When the elapsed time is equal to or longer than the predetermined time in step 42, the cleaning process 1 is finished, the process proceeds to step 43, and the process proceeds to cleaning process 2.

  In the cleaning process 2, when the operation is started in Step 50 of FIG. 5, the water supply valve 12 is opened in Step 51 and additional water is supplied for a predetermined time, the water level is the same as the water level in the cleaning process of the standard course, and the cleaning is performed in Step 52. The pump 9 is continuously operated to inject cleaning water from the cleaning nozzle 4 toward the dishes 5, and the heater 8 is energized continuously to heat the cleaning water.

  When the temperature of the washing water becomes equal to or higher than the predetermined temperature in step 53, the heater 8 is turned off in step 54. When the elapsed time exceeds the predetermined time in step 55, the process proceeds to step 56, the drain pump 13 is turned on and drained, and the process proceeds to the next process in step 57.

  Thereafter, a rinsing process and a heating rinsing process are performed, and the operation is finished through a drying process.

  As described above, in the dishwasher according to the present invention, when the water level detecting means 14 detects the water level, the water supply valve 12 is closed to stop the water supply into the washing tank 1, the detergent dissolution process is performed, and the washing pump 9 is reversed. Since the intermittent rotation operation is started, it is possible to easily increase the detergent concentration of the washing water in the washing process 1, and thereby, the detergent is dissolved at an early stage and thereby stronger than before. The action force of the detergent on the dirt can be increased, the dirt can be removed quickly and effectively, and the cleaning ability can be greatly improved.

  In addition, if the water level detection means 14 is comprised using a pressure detection means, and a water level is detected in multiple steps, the detergent density | concentration in washing water can be easily implement | achieved accurately and accurately.

  Further, by turning off the water supply valve 12 for a predetermined time before the water level detecting means 14 detects the water level, a water level lower than that in the cleaning step 2 can be easily realized in the detergent dissolving step or the cleaning step 1.

  Furthermore, if the water level in the cleaning step 1 of the present invention is made much lower than the water level in the cleaning step of the standard course, cleaning can be performed with a higher detergent concentration, and an extremely high cleaning effect can be obtained.

  In such a case, in the cleaning process 1, the cleaning pump 9 performs an intermittent operation such as a 2-second operation and a 5-second stop. If it is about 2 seconds, it can avoid that the discharge pressure of the washing pump 9 falls because the washing pump 9 inhales the detergent contained in washing water, and the bubble which arises from contamination, and tableware with predetermined | prescribed discharge pressure can be avoided. Washing water can be sprayed onto the class 5, and washing can be performed making the best use of the effect of high detergent concentration. Moreover, generation | occurrence | production of the noise which arises when the washing pump 9 inhales foam can also be suppressed.

  In addition, the cleaning water is stopped for 5 seconds. During this time, the cleaning water sprayed from the cleaning nozzle 4 and the cleaning water in the course of the path from the cleaning pump 9 to the cleaning nozzle 4 are placed near the drain 10 of the cleaning tank 1. If it takes less than 3 seconds for the return time, there is not enough washing water collected near the drain port 10, and when the washing pump 9 sucks the washing water, bubbles and air are sucked at the same time, so-called air biting occurs. However, since abnormal noise is generated, it is preferable to set it to about 5 seconds. This is due to the same reason for stopping for 5 seconds in the detergent dissolution process performed at substantially the same water level.

In the detergent dissolution process, the energization of the heater 8 is also intermittent in conjunction with forward / reverse rotation and intermittent operation of the cleaning pump 9. This is because when the cleaning pump 9 is intermittently operated while the heater 8 is continuously energized,
This is because the current amount of the entire dishwasher temporarily increases due to the inrush current to the washing pump 9, and the breaker in the household used may fall. If the cleaning pump 9 uses a motor with a small inrush current and there is no risk of the breaker dropping, it is desirable to continuously energize the heater 8 because the temperature of the cleaning water rises faster and the cleaning power improves.

  In this way, after the cleaning process 1 for effectively cleaning strong dirt at a high detergent concentration, the cleaning process 2 for cleaning with an increased amount of cleaning water is provided, so that a large amount of cleaning is generated in the cleaning process 1. The dirt component concentration in the water can be reduced, the redeposition to the tableware 5 due to the dirt component present in the washing water can be effectively prevented, and the washing finish of the tableware 5 can be further improved. Further, by performing the final process of the cleaning process at a cleaning concentration lower than the cleaning process 1, it is possible to facilitate rinsing in the rinsing process as the next process.

  Although the cleaning pump 9 is intermittently operated in the cleaning process 1, the cleaning pump 9 does not suck in bubbles contained in the cleaning water, and the discharge pressure of the cleaning pump 9 is reduced by sucking the bubbles. Needless to say, if there is no, continuous operation may be possible.

  In addition, although the heater 8 is intermittently energized in the detergent dissolution process and the cleaning process 1 for safety measures such as the surface temperature of the heater 8, it may not be energized.

  As described above, by providing a detergent dissolution process at the beginning of the cleaning process, it is possible to quickly produce a constant density cleaning water with a high detergent concentration at a low water level, and when washing highly contaminated items such as cooking utensils In this case, since the jet cleaning water from the cleaning nozzle 4 is cleaning water having a high cleaning concentration from the beginning, it is possible to effectively act on dirt, and a higher cleaning effect can be obtained.

  In the dishwasher of the present invention, as shown in FIG. 6, a detergent charging port 60 is provided in the vicinity of the suction port 61 of the cleaning pump 9. Hereinafter, this configuration will be described in detail.

  The drain port 10 is provided in the front inner bottom part of the washing tank 1, and the residue filter 11 is detachably mounted in the upper surface opening part 10a. When removing the residue accumulated in the residue filter 11, the user opens the door 3 and removes the residue filter 11 from the machine. Further, the upper surface opening 10a of the drain port 10 is provided with a detergent inlet 60 for feeding a detergent formed in a cylindrical shape so as to extend upward, so that the detergent can be easily introduced. When the user opens the door 3 and puts detergent into the detergent inlet 60 from above, the detergent falls in the detergent inlet 60 and is guided and stored in the drain outlet 10. Further, the cleaning pump 9 is communicated with one side surface of the drain port 10 through a suction port 61.

  Thus, by providing the detergent inlet 60 in the vicinity of the suction inlet 61 of the cleaning pump 9, the detergent is introduced into the cleaning tank 1 to start the operation, and the cleaning water is supplied and the operation of the cleaning pump 9 is started. When started, since the mechanical force can be given to the detergent more quickly by the rotation of the rotary blade 62 of the washing pump 9, it is possible to create washing water in which the detergent is dissolved earlier, and the detergent in the detergent dissolution process. Undissolved residue can be prevented.

  As described above, the dishwasher of the present invention can be made into a constant density washing water with a high detergent concentration at a low water level at an early stage. Since the spray water can be washed water with a high cleaning concentration from the beginning, it is possible to effectively act on dirt, and a higher cleaning effect can be obtained. It is useful as a dishwasher that jets water to wash dishes.

The longitudinal cross-sectional view of the dishwasher in Embodiment 1 of this invention Block diagram of the dishwasher Flow chart of the operation of the dishwasher in the detergent dissolution process Operation flowchart of the washing process 1 of the dishwasher Operation flowchart of washing process 2 of the dishwasher Main section of the dishwasher Vertical section of a conventional dishwasher Block diagram of a conventional dishwasher Enlarged front view of the operation part of a conventional dishwasher Flowchart of operation of washing step 1 of a conventional dishwasher Flow chart of the operation of the washing process 2 of the conventional dishwasher

1 Washing tank 4 Washing nozzle 5 Tableware (objects to be washed)
8 Heater 9 Washing pump 12 Water supply valve (water supply means)
14 Water level detection means 16 Control device 17 Control means 25 Input means

Claims (4)

A cleaning tank for storing objects to be cleaned such as tableware, a cleaning nozzle for injecting cleaning water to the objects to be cleaned, a cleaning pump for pumping cleaning water to the cleaning nozzle, and a water supply means for supplying water into the cleaning tank And a water level detecting means for detecting the water level in the washing tank, and a control means for controlling each of the washing, rinsing and drying processes, wherein the control means removes the introduced detergent at the beginning of the washing process. In addition to performing a detergent dissolution process to be dissolved, in the detergent dissolution process, the water supply means is controlled in conjunction with the water level detection means to supply water at a level lower than the water level of the process executed after the detergent dissolution process. A dishwasher that controls the washing pump to rotate forward and backward. The control means does not perform drainage and water supply after the detergent dissolution process, and intermittently performs an operation of rotating the cleaning pump in one direction so that the cleaning water is jetted from the cleaning nozzle to clean the object to be cleaned. The dishwasher according to claim 1, wherein 1 is executed. The control means performs additional cleaning water after the cleaning process 1, and continuously performs an operation of rotating the cleaning pump in one direction to inject the cleaning water from the cleaning nozzle to execute the cleaning process 2 for cleaning the object to be cleaned. The dishwasher according to claim 2. The dishwasher according to any one of claims 1 to 3, wherein a detergent inlet is provided in the vicinity of the suction port of the washing pump.

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