JPS6048724A - 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 the Invention The present invention relates to a dishwasher that automatically cleans dirty tableware after meals.

Conventional structure and problems Traditionally, washing and rinsing in dishwashers have been time-controlled using a timer to operate for a fixed period of time, and users have to set the timer based on their past experience. I was cleaning. Therefore, it takes more time than necessary,
It has the disadvantage of wasting electricity and water. Therefore, it is required to accurately detect the end of each process.

Purpose of the Invention The present invention has been made to solve the above problems, and detects changes in the transmittance of cleaning liquid and rinsing liquid using a light-emitting element and a light-receiving element arranged in a state not in contact with these liquids. The overall purpose is to control the completion of rinsing, draining and drying.

Structure of the Invention In the dishwasher of the present invention, at least a part of the wall surface of the water suction pipe that communicates between the water reservoir provided at the bottom of the washing tank and the water suction side of the nozzle pump is made of a transparent material. This dishwasher is equipped with a light-emitting element and a light-receiving element so that it can detect all changes in the transmittance of water flowing through the water suction tube, eliminating malfunctions caused by the effects of detergent foam and food residue. This allows for highly accurate process control.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described based on the attached drawings. 1 is a main body, 2 is a cleaning tank installed inside the main body 1, and 3 is a door, which is an upper stage that can be taken in and out of the cleaning tank 2. It is pivotally supported on the main body 1 by a hinge (not shown) in correspondence with an opening 2' provided in the cleaning tank 2 for the heel 4 and the lower heel 6. A caster 4' is provided on the upper tier 4, and a caster 6' is provided on the lower tier 6, which can be moved in and out along guide rails 5 and 7 screwed onto the side wall of the cleaning tank 2, respectively. Reference numeral 8 denotes an electric heater provided at the bottom of the cleaning tank 2, which is used both to heat the cleaning water and to heat the air during drying. 9 is cleaning tank 2
The filter 10 is fitted in a water reservoir provided at the bottom corner of the tank. 11 is a drainage bonder, and its suction side is a suction pipe 1
2 is connected to the bottom of the water reservoir chamber 9, and the discharge side is opened to the outside of the main body 1 via a drain valve 13. Reference numeral 16 denotes a fan, which takes in air through an intake pipe 16 that opens to the outside air, and has a discharge pipe 17 connected to the vicinity of the electric heater 8 at the bottom of the cleaning tank 2.The drain bonder 11 and the fan 15 are the same. motor 1
It is driven by 4. 18 is a nozzle pump, and motor 19
The water suction side communicates with the side surface of the water reservoir chamber 9 provided at the bottom of the cleaning tank 2 through a water suction pipe 2o.
0 has at least a part of its wall surface made of a translucent resin material, and the discharge side is connected to a discharge pipe 21 that branches into a lower discharge pipe 22 and an upper discharge pipe 23 from the middle.

The lower discharge pipe 22 is fixedly installed at the bottom of the cleaning tank 2, and communicates with a nozzle 24 that engages therein and a guide tower 26 that is rotatable and capable of giving and receiving cleaning water.

The nozzle 24 performs all of the dishwashing by spraying from a washing spout 26 provided on itself, and is given full rotational force by a rotating spout 27. The upper discharge pipe 23 is connected to a submergence attachment 29 attached to the cleaning tank 2 at a position where it engages with a guide pipe 28 fixed to the upper car 4. The water immersion attachment 29 has a structure that opens when the tip of the guide tube 28 fixed to the upper heel 4 is inserted, and blocks the washing water when removed. It consists of an energized valve.

The end of the guide pipe 28 fixed to the upper heel 4 opposite to the side connected to the flooded attachment 29 is bent downward to the center of the upper heel 4 to form the entire guide tower 3Q. A nozzle 31 is rotatably fitted in the nozzle 31 so that cleaning water can be delivered and received. 32 is a spout provided in the nozzle 31, and 33 is a rotating spout. Reference numeral 34 denotes a buffer body fixed to the door 3, which is provided to regulate the position of the guide tube 28 fixed to the upper door 4 so that the tip of the guide tube 28 is reliably fitted into the submergence attachment 29. 36 is an exhaust port, which communicates with the cleaning tank 2. 36 is a holder supported by the water suction tube 20, and as shown in FIG. The elements 38 are held facing each other on the same line. Note that the arrow indicates the outflow direction of the liquid.

Next, the operation of this embodiment will be explained. When washing dishes, store all the dishes in the upper tier 4 and the lower tier 6, and then use the washing tank 2.
When a certain amount of water is supplied into the tank, the nozzle pump 18 is driven by the motor 19, sucks water from the water storage chamber 9 at the bottom corner of the cleaning tank 2, and reaches the drain pipe 21, which is a branched lower discharge pipe. 22 and the upper discharge pipe 23. Lower discharge pipe 2
The water guided to the guide tower 26 is guided to the rotatable nozzle 24, and is ejected from the rotating spout 27 to the nozzle 2.
4 While rotating fully, water is ejected from the washing spout 26 to mainly remove dirt and grime from the dishes stored in the lower shelf 6. on the other hand,
The water led to the upper discharge pipe 23 is led to the guide tower 30 at the end of the guide pipe 28 fixed to the upper heel 4 through the immersion attachment 29 provided in the cleaning tank 2, A nozzle 31 that is rotatable and fitted to allow water to be delivered and received.
, the jet is ejected from the rotating spout 33 provided on the nozzle 31, rotates the nozzle 31, and is ejected from the cleaning spout 32 provided upward on the upper surface of the nozzle 31, causing the upper stage 4 Remove dirt from dishes stored in the room. The water mixed with filth collects at the bottom of the cleaning tank 2 again and passes through the filter 1.
The filth is filtered by the filter 0, relatively clean water is passed from the water reservoir chamber 9 through the water suction pipe 20, and is again jetted out from the nozzle 24, 31 by the nozzle pump 18 for pre-washing.

In this pre-washing process, when the permeability of the pre-washing liquid decreases due to dirt, the light from the light-emitting element 37 that reaches the light-receiving element 38 provided in the water suction pipe 2Q decreases, and the output voltage of the light-receiving element 38 decreases as shown in FIG. It changes like this.

When light dirt is removed by hand washing, the transmittance of the prewash liquid decreases, and the output voltage of the light receiving element 38 decreases.

Therefore, the overall degree of dirt can be detected based on the amount of change in the output voltage of the light receiving element 38, and the amount of water, detergent, etc.
You can predict and set all the time etc.

Next, in the main washing process, a certain amount of water is supplied into the washing tank 2, detergent is added, and the same operation as the pre-washing is performed. At this time, the nozzle pump 18 performs intermittent operation including a short pause every 1 to 2 minutes, and at each pause, the total transmittance of the cleaning liquid is detected, the output voltage of the light receiving element 38 is compared, and the transmitted The point at which there is no longer any change in temperature, that is, the point at which dirt no longer falls off, is detected, the cleaning is completed, and the water is drained.

During the drainage process, the end of drainage is detected by detecting a sudden change in permeability when the water level drops using the detection unit.

Furthermore, during rinsing, the output voltage of the light-receiving element 38 is configured to repeat the rinsing and draining until the transmittance of the fresh water supplied to the water becomes close to X, in the same way as during cleaning, and to detect the end of rinsing, and during drying, The water in the water suction pipe 20 evaporates and all water droplets adhere to the side wall, resulting in a decrease in transmittance, but as drying progresses, the transmittance improves. Therefore, it is configured to detect all the changes to detect dryness.

As described in detail, the dishwasher of the present invention provides the following effects.

(1) By arranging the light emitting element and the light receiving element in the water suction pipe between the water droplet chamber provided at the bottom of the cleaning tank and the water suction side of the nozzle pump, malfunctions due to food residue during cleaning can occur. Moreover, since it is installed on the water suction side of the nozzle pump, changes in the transmission field can be accurately detected without being affected by bubbles generated by the nozzle pump.

(2) Since the light-emitting element and the light-receiving element are provided outside the water suction tube, malfunctions due to adhesion of dirt or oil in the cleaning liquid do not occur.

(3) The flow rate of the water flowing into the water intake pipe is relatively high, so the detection part is less likely to get dirty.

(4) Since all the detection elements are installed in the water suction pipe, six types of detection can be performed at the same location: pre-washing completion, washing completion, rinsing completion, draining completion, and drying completion, so it is possible to use one set of detection elements and it is inexpensive. be.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a dishwasher showing an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the main part of FIG. 1, and FIG. 3 is an explanatory diagram of the process. 2...Cleaning tank, 4...Upper basket, 6...
...Lower basket, 9...Water room, 1o...
... Filter, 18 ... Nozzle pump, 19 ... Morph, 20 ... Water suction pipe,
36... Holder, 37... Light emitting element, 3B... Light receiving element.

Claims (1)

[Claims] At least part of the wall surface of the water suction pipe provided between the water storage chamber provided at the bottom of the cleaning tank and the water suction side of the nozzle pump is made of a translucent material, and the transmittance of the liquid inside the water suction pipe is A dishwasher is equipped with a light-emitting element and a light-receiving element that detect changes in the amount of light received by the light-receiving element, and controls the completion of washing, rinsing, draining, and drying processes based on changes in the amount of light received by the light-receiving element.