JPS60171028A - Tablewear washer - 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 Industrial Application The present invention relates to a dishwasher for general household use.

Conventional structure and its problems In general, the washing method of a dishwasher sucks washing water through the drain hole at the bottom of the washing tank, and sprays it through a nozzle.
This is a method of circulating cleaning water. On the other hand, the pressure switch is programmed to detect the water level in the cleaning tank, and when it reaches the reset state, it stops the cleaning pump, drives the water supply valve, and replenishes the water. If you operate the cleaning pump when the drain hole is clogged with leftover food, it will be difficult to suck water through the drain hole.
The pressure switch connected to the drain hole resets and water is supplied. However, since the wash pump stops while water is being supplied, the pressure switch trips immediately, stopping the water supply and turning the wash pump.

As described above, if the drainage hole becomes blocked for some reason, a so-called "breathing phenomenon" occurs in which water supply and cleaning are repeated alternately.

Conventional dishwashers are operated by a program that combines a built-in timer and a group of cam switches.
Even when this "breathing phenomenon" or abnormal operation occurs, it cannot be detected and the program continues to operate normally.As a result, the dishes are not washed sufficiently.
Otherwise, the washing tank had the disadvantage of overflowing.Object of the Invention The present invention solves the above-mentioned disadvantages of the conventional technology.The present invention detects a breathing phenomenon and stops the operation according to the normal program when this occurs. However, the object of the present invention is to provide a dishwasher which notifies this abnormal state by a buzzer.

Structure of the Invention The dishwasher of the present invention includes a water level detection means for detecting the water level in the washing tank, a storage means for storing the output of the water level detection means, and an abnormal state is determined from the water level fluctuation data in the storage means. and a control means that takes the outputs of the water level detection means and the abnormality determination means as input and controls the cleaning pump, the water supply valve, and the buzzer, and controls the operation of the cleaning pump and the water supply valve based on the output of the abnormality determination means. It is configured to stop the machine and sound a buzzer.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. 1 is a pressure switch that detects the water level in the cleaning tank. Reference numeral 2 denotes a storage means which inputs the output of the pressure switch 1 and stores this water level data. Reference numeral 3 denotes an abnormality determining means, which determines from the data in the storage means 2 whether there is an abnormal state. Reference numeral 4 denotes a control means which receives the outputs of the pressure switch 1 and the abnormality determination means 3 as input, and normally drives the cleaning pump 5 when the pressure switch 1 is in a trip state and drives the water supply valve 6 when the pressure switch 1 is in a reset state. If it is determined that there is an abnormality by the means 3, the operation of the cleaning pump 6 and the water supply valve 6 is stopped, the buzzer is sounded,
This is to notify that there is an abnormal state.

FIG. 2 is a circuit diagram showing a specific configuration of one embodiment. 8
is a commercial power source. 9.10 are cleaning pumps 6,
A bidirectional thyristor that drives the water supply valve 6; 1 a pressure switch that detects the water level; 7 a buzzer that notifies an abnormal state; 11 a microcomputer;
a, an input section 11b, an output section 11C1, and an arithmetic control section 11d, which receives the pressure switch 1 as an input and controls the energization of the bidirectional thyristors 9 and 1o and the buzzer 7, which are outputs.

The operation of this embodiment will be explained. FIG. 3 shows the main part of a flowchart under the control of the microcomputer 11. When the program enters the cleaning process, the microcomputer 11 drives the cleaning pump 6 in step 12. Next, in step 13, the cleaning operation is continued until the cleaning process is completed.

On the other hand, in step 14, the microcomputer 11 determines whether the pressure switch 1 has been reset during this cleaning, and if it has been reset, in step 15, the microcomputer 11 opens the water supply valve,
Stop the cleaning pump.

As a result of this operation, the water level eventually rises, so in step 16 the microcomputer 11 determines whether the pressure switch 1 has tripped. If it trips, it means that one trip has passed since the reset, and this number of trips is stored in step 17. Next, in step 18, if the predetermined number of times is not reached, the process returns to the normal cleaning process.

If the number of times exceeds a certain value, the microcomputer 11 determines that a breathing phenomenon has occurred, stops the operation of the water supply valve 6 and the cleaning pump 6 in step 19, and sounds a buzzer to notify an abnormality in step 20. . That is, the microcomputer 11 is made to store the number of times the pressure switch 1 has tripped since the reset, that is, the number of respirations, and if this number is greater than or equal to the number at which it can be determined that a breathing phenomenon has indeed occurred, the operation is immediately stopped and an abnormality alarm is issued. It is something that makes you do.

According to the embodiment described above, it is possible to detect the breathing phenomenon of the pressure switch 1, thereby making it possible to detect clogging of the drain hole. Furthermore, when a breathing phenomenon occurs, a buzzer is used to notify the user of the abnormal state.

Effects of the Invention 1 The present invention has a storage means that receives the output of the water level detection means as input, an abnormality determination means that determines an abnormal state from the data of the storage means, and outputs of the water level detection means and the abnormality determination means as input. , a control means for controlling a water supply valve, a cleaning pump, and a buzzer is provided, and the abnormality determining means is capable of detecting clogging of the drain hole and notifying the user of this with a buzzer. It is possible to provide a dishwasher that is capable of

[Brief explanation of drawings]

FIG. 1 is a block diagram of the main parts of a dishwasher showing an embodiment of the present invention, FIG. 2 is a specific circuit diagram thereof, and FIG. 3 is a flowchart of the main parts. 1... Pressure switch, 2... Memory means, 3... Abnormality determination means, 4... Control means, 5... Cleaning pump , 6... Water supply valve, 7... Buzzer, 11... Microcomputer. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] water level detection means for detecting the water level in the cleaning tank; storage means for storing the output of the water level detection means; abnormality determination means for determining an abnormal state from the water level data in the storage means; and the water level detection means. The output of the abnormality determination means is input,
A dishwasher comprising control means for controlling the operation of the washing pump and water supply valve to be stopped and for sounding a buzzer based on the output of the abnormality determining means.