JPH01320037A - dishwasher - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dishwasher equipped with a food waste filter that prevents food waste from flowing into the pump.

BACKGROUND OF THE INVENTION A conventional dishwasher has a structure shown in FIGS. 7 and 8. In other words, 1 is a control means that sequentially operates washing, rinsing, and drying according to a predetermined procedure, 2 is a washing pump that circulates washing water, 3 is a drainage pump that discharges washing water to the outside, and 4 is a washing pump 2, a drainage pump. It is a load driving means for driving the pump 3 and is controlled by the control means 1. Reference numeral 6 denotes a washing tank for storing, washing and drying dishes, etc., 7 a leftover filter attached to the bottom of the washing tank 6 on the water suction path side of the washing pump 2 and drain pump 3 to collect leftovers, and 8 a washing pump. This is a nozzle that applies the washing water from No. 2 to dishes, etc. to wash them.

Next, to explain the operation, water is stored in the washing tank 6, water is circulated from the bottom of the washing tank 6 by the washing pump 2, water is jetted from the nozzle vB to wash the dishes, and then, after washing is completed, the washing water is pumped out. Water is drained from the cleaning tank 6 by the drain pump 3.

At that time, the leftovers are collected by the leftover filter 7 installed between the cleaning tank 6 and the cleaning pump 2/drainage pump 3, and are transferred to the blades of the cleaning pump 2/drainage pump 3 via the water absorption path. The structure is designed to prevent leftovers from entering.

In addition, the leftover food filter is removable for cleaning leftover food after the product has completed its operation.

Problems to be Solved by the Invention In such a conventional configuration, the leftover filters 7 are either added in rows, floating without being reliably added, or the leftover filters 7 are clogged. When the product is operated, leftover food may enter the washing pump 2 and drain pump 3, and there is a risk that the motors that drive these pumps 2 and 3 may become locked. Further, there was a problem in that leftover food entered the nozzle 8 and the injection port became clogged, resulting in a decrease in cleaning performance.

In view of the above-mentioned problems, the present invention aims to prevent equipment from being damaged even when leftover filters are arranged in rows or floating, or even when they are clogged, and also to prevent deterioration in cleaning performance. .

Means for Solving the Problems In order to achieve the above object, the first technical means of the present invention is a control means that sequentially operates washing, rinsing, and drying according to a determined procedure, a pump that circulates washing water, and a pump that circulates washing water. A leftover filter is installed on the water suction path side of the pump to collect leftovers.
The pump is equipped with water pressure detection means for detecting the pressure of water discharged from the pump, and the control means is configured to determine an abnormality and sequentially stop the operation when the water pressure from the water pressure detection means falls outside a predetermined range. Further, the second technical means includes a leftover filter state detection means consisting of a magnet attached to the leftover filter and a switch that is turned on and off by the magnet,
The leftover filter state detection means is configured to turn on a switch due to the influence of a magnet when the filter is placed in a predetermined position, and the control means inputs this ON signal to determine an abnormality and sequentially stop the operation. be.

According to the first technical means described above, if the leftover filter is not installed, floating, or clogged, the signal from the water pressure detection means will deviate from the normal pressure range. Therefore, if the product falls outside of this range, the operation of the product will be stopped, and cleaning performance will deteriorate due to motor lock or nozzle clogging due to leftovers, cleaning performance or cleaning performance may be reduced due to clogged leftover filter. Deterioration of rinsing performance can be prevented.

Further, according to the second technical means, since the attachment of the leftover food filter detects the state or floating state and sequentially stops its operation, it is possible to prevent the motor lock phenomenon due to leftover food.

EXAMPLE Hereinafter, an example of the present invention will be explained with reference to FIGS. 1 to 3. In the drawings, the same members as in the conventional example are designated by the same reference numerals, and their explanations will be omitted.

In the figure, 6 is a water pressure detection means for detecting the water pressure discharged from the cleaning pump 2, and 9 is a pressure hose that connects the washing pump 2 and the water pressure detection means 5.

Next, the operation will be explained with reference to FIG. Water is stored in the cleaning tank 6 in the previous process. Next, in step 2Q, the control means 1 operates the washing pump 2, and the water at the bottom of the washing tank 6 is sprayed from the nozzle V8 through the leftover filter 7 to wash dishes and the like. At this time, pressure is applied to the pressure detection means 6 via the pressure hose 9. In step 21, if the leftover filter 7 is not present or in a floating state, the pressure will be a high value. Therefore,
In response to the signal from the pressure detection means 5, the control means 1 performs step 23.
The operations are sequentially stopped at step 24, and abnormality display and notification are performed at step 24. Next, in step 22, if the leftover food filter 7 is clogged with a large amount of leftover food, the pressure becomes a low value. At that time as well, the control means 1 performs the same operation as in step 23 and 24 in accordance with the signal from the pressure detection means 6 as in the previous section. Next, if the leftover filter 7 is normal, it operates for the cleaning time in step 25 and moves on to the next step.

In this embodiment, the discharge water pressure of the washing pump 2 is detected, but a water pressure detection means is also provided on the discharge water side of the drainage pump 3, so that the state of the leftover filter 7 can be detected even during the drainage process. Good too.

Next, an embodiment of the pond of the invention will be described with reference to FIGS. 4 to 6. Note that the same members in the drawings as in the conventional example are given the same reference numerals, and their explanations will be omitted.

In the figure, 10 is a magnet attached to the leftover filter, 11
12 is a switch for turning ON and OFF the magnet 1o;
consists of a switch 1o that is operated by a magnet 10. When the leftover filter 7 is installed in the correct position, the switch 1o is turned on, and when no additional filter is installed or it is floating, the switch 1o is turned on.
0 is a leftover filter state detection means that is turned OFF.

Next, the operation will be explained with reference to FIG.

Water is stored in the cleaning tank 6 in the previous process. Next, in step 30, the control means 1 detects whether or not the leftover filter 7 is on the side, based on the signal from the leftover filter state detection means 12. If the leftover filter 7 is not loaded, the operation is sequentially stopped in step 31, and an abnormality display and notification is performed in step 32. If the leftover filter 7 is properly attached, the cleaning pump 2 is operated in step 33 and operated for the cleaning time in step 34. Next, in step 36, the drain pump 3 is operated, and in step 36, the drain pump 3 is operated for the draining time, and then the process moves to the next step.

Effects of the Invention As is clear from the embodiments described above, according to the present invention, a state in which the leftover filter is not installed, a state in which it is floating, or a state in which it is clogged is detected by the signal of the water pressure detection means, and the operation is sequentially stopped. This prevents the pump drive motor from locking up due to leftovers, and prevents a decrease in cleaning performance due to nozzle clogging and a decrease in cleaning and rinsing performance due to clogged leftover filter. can. Further, even if the leftover filter state detection means directly detects the presence or absence of the leftover filter and sequentially stops its operation, overloading of the pump can be prevented and damage to the equipment can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the main parts of a dishwasher according to an embodiment of the present invention, Fig. 2 is a cross-sectional view of the same, Fig. 3 is a flowchart of the main parts of the same, and Fig. 4 is a dishwasher according to another embodiment of the invention. 5 is a sectional view of the same, FIG. 6 is a flowchart of the main part, FIG. 7 is a block diagram of the main part of a conventional dishwasher, and FIG. 8 is a sectional view of the same.・1... Control means, 2... Washing pump, 3... Drain pump, 4... Load driving means, 6... Water pressure Detection means, 6... Washing tank, 7... Leftover filter, 8... Nozzle, 9... Pressure hose, 1o... Magnet, 11... Switch, 12... Leftover cooking state detection means. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 7 Figure 8 U)

Claims (2)

[Claims] (1) A control means that sequentially operates washing, rinsing, and drying according to a predetermined procedure, a pump that flows washing water, a leftover filter that is attached to the water suction path side of the pump to collect leftovers, and the pump The dishwasher is equipped with a water pressure detection means for detecting the pressure of water discharged from the water pressure detection means, and the control means determines an abnormality when the water pressure from the water pressure detection means is outside a predetermined range, and sequentially stops the operation. (2) a control means that sequentially operates washing, rinsing, and drying according to a predetermined procedure; a pump that flows washing water; a leftover filter that is attached to the water suction path side of the pump that collects leftovers; The leftover filter state detection means includes a magnet attached to the leftover filter and a switch that is turned on and off by the magnet, and the leftover filter state detection means detects the state of the leftover filter when the filter is placed in a predetermined position due to the influence of the magnet. A dishwasher in which a switch is turned on, the control means inputs this ON signal, determines an abnormality, and sequentially stops the operation.