JPH03140134A - Tableware washing machine - Google Patents

Abstract

PURPOSE:To shorten the time for informing hot-water heater abnormality by varying and controlling the time for detecting the hot-water heater abnormality by the temperature difference of washing water at the time of start of washing and the temperature. CONSTITUTION:The tableware washing machine is provided with a washing tank 10 for containing tableware, etc., in a tableware basket and storing washing water, a feed water means for supplying the washing water into the washing tank 10, a water level detecting means 3 for detecting a water level in the washing tank 10, a washing means 6 for washing tableware by washing water, an informing means 9 for informing occurrence of abnormality, a temperature detecting means 8 for detecting a temperature of the inside of the washing tank 10 and washing water, and a control means 1 for controlling the feed water means 2, the heating means 7, the washing means 6 and the informing means by inputting signals of the water level detecting means 3 and the temperature detecting means 8, and also, varying and controlling the time for detecting hot-water heater abnormality by a temperature difference of washing water at the time of start of washing and the temperature. Since the time for detecting the hot-water heater abnormality by a temperature difference and a temperature of the temperature detecting means 8 at the time of washing is varied, the time for informing the abnormality due to abnormality of the heating means 7 can be shortened, and it can be informed quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dishwasher for washing dishes, etc., and particularly to an abnormality notification operation thereof.

2. Description of the Related Art A conventional dishwasher has a structure as shown in FIG. FIG. 4 shows a block diagram thereof. In FIGS. 3 and 4, 1 is a control means for controlling washing, rinsing, and drying programs; 2 is a water supply means for supplying water used for washing and rinsing; 3 is a water level detection means for detecting the water level in the cleaning tank; 4 is a start means for starting the control means 1;
5 is a drainage means for discharging the water in the cleaning tank, 6 is a cleaning means for circulating the cleaning water for cleaning, 7 is a heating means for warming the inside of the tank during cleaning and drying, and 8 is the temperature in the cleaning M2O and the cleaning water. Temperature detection means for detecting the temperature, and numeral 9 are notification means for notifying when the start means 4 is accepted or when there is an abnormality in the dishwasher. Reference numeral 11 denotes a nozzle for applying washing water from the washing means 6 to the dishes, which is disposed in the washing tank 10 and washes the dishes stored in the washing tank 10 in a dish basket.

Next, the operation will be explained using FIG. 2. Ste Tubu 1
At step 8, the control means 1 operates the drainage means 5 in response to the signal from the start means 4 to drain the remaining water in the cleaning tank 10. At step 19, water supply means 2 is operated to supply water into cleaning tank 10, and at step 20, water is supplied until a constant water level is reached according to a signal from water level detection means 3. In step 21, the heating means 7 and the washing means 6 heat and circulate the washing water, and the water is sprayed from the nozzle 11 to wash the dishes, step 22
Then, it is determined whether the temperature is 60° C., and if it is less than 60° C., it is determined in step 23 whether 20 minutes have elapsed. If the elapsed time has elapsed, in step 24, the drainage means 5 is operated and the washing water is drained.In step 25, water supply, drainage, and rinsing (only the washing means 6 is operated) are repeated.In step 26, the heating means 7 and the washing water are removed. In the means 6, the washing water is heated and circulated, and is sprayed from the nozzle 11 to perform heating rinsing.9 Next, after the rinsing is completed, in step 27, the heating means 7 is operated intermittently to warm the inside of the washing tank 10 and clean the dishes. It dries the water droplets.

The above is the operation of a typical dishwasher.6However, if there is an abnormality in the heating means 7 during the washing or heating rinsing process, it is determined in step 22 that the temperature is less than 60°C, and in step 28 it is determined that 60 minutes have elapsed. , the entire load is stopped in step 29 and the notification means 8 is operated (hereinafter referred to as water boiling abnormality) to notify the user.

Problems to be Solved by the Invention In such conventional dishwashers, there is a problem in that the time required to notify an abnormality is extremely long because the washing water covers the time even when the temperature is low.

The present invention solves the above-mentioned problems, and aims to provide a dishwasher that can shorten the time it takes to notify an abnormality in boiling water based on the temperature difference between the water and the wash water at the start of washing. .

Means for Solving the Problems In order to solve the above problems, the dishwasher of the present invention includes a washing tank in which tableware is stored in a dish basket and washing water is stored therein, and washing water is supplied into the washing tank. A water supply means, a water level detection means for detecting the water level in the washing tank, a washing means for washing dishes with washing water, an alarm means for notifying in the event of an abnormality, a temperature detection means for detecting the temperature in the washing tank and the washing water, By inputting the signals from the water level detection means and temperature detection means, the water supply means, heating means, cleaning means, and notification means are controlled, and furthermore, the temperature difference between the water and the cleaning water at the start of cleaning is used to detect an abnormality in water heating. It is equipped with a control means that changes and controls the time.

Function: With the above configuration, the time required to detect an abnormality in water heating is changed depending on the temperature difference and temperature of the temperature detection means during cleaning, so the time required to notify an abnormality in the case of an abnormality in the heating means can be shortened, and the notification can be made quickly. can.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings. The basic configuration of the dishwasher is the same as the conventional dishwasher, so the same reference numerals will be used and the explanation thereof will be omitted.

FIG. 1 is a control flow diagram of a control means for a dishwasher according to an embodiment of the present invention. In FIG. 1, in step 30,
The water supply means 2 is operated, and in step 31 the water level detection hand Vi is activated.
Cleaning water is supplied into the cleaning tank 10 until 3 is detected. In step 32, the heating means 7 and the cleaning means 6 are operated to perform cleaning. In step 33, the temperature of the cleaning water is detected based on the signal from the temperature detection means 8.

In step 34, it is determined whether the temperature exceeds 60°C, and if it is below 60°C, it is determined in step 35, and if it is less than 5°C, it is determined in step 36 whether 60 minutes have elapsed. Step 3
If the temperature is 5° C. to 15° C. in step 7, it is determined in step 38 whether 50 minutes have elapsed. In step 39, 15°C to 25°C
If so, in step 40 it is determined whether 40 minutes have elapsed.

If it is 25°C or higher, it is determined in step 41 whether 30 minutes have passed.Next, in step 42.43, when 5 minutes have passed, it is determined whether the temperature is 2°C or lower or higher than the temperature at the start of cleaning. If the temperature is detected as 60° C. in step 34, it is determined in step 44 whether 20 minutes have elapsed.

If 20 minutes have not elapsed, the process returns to step 33. After 20 minutes have passed, proceed to the next step.

Next, in steps 36.3g and 40.41, if the time has elapsed, and in step 43, if the temperature is 2°C or lower than the temperature at the start of cleaning, in step 45, the load is stopped and the notification means 9 is activated to detect an abnormality. Inform.

Effects of the Invention As described above, according to the present invention, it is possible to detect the temperature difference and the temperature of the washing water from the start of the washing process and to shorten the time until an abnormality in water heating is notified.

[Brief explanation of the drawing]

Fig. 1 is a flowchart of a dishwasher according to an embodiment of the present invention, Fig. 2 is a control flowchart of a conventional dishwasher, Fig. 3 is a sectional view of the dishwasher, and Fig. 4 is a block diagram of main parts of the dishwasher. It is. DESCRIPTION OF SYMBOLS 1... Control means, 2... Water supply means, 3... Water level detection means, 4... Start means, 5... Drainage means, 6
...Cleaning means, 7...Heating means, 8...Temperature detection means, 9...Upper alarm, 1G...Cleaning tank, 11...
·nozzle.

Claims (1)

[Claims] 1. A washing tank for storing tableware in a dish basket and storing washing water, a water supply means for supplying washing water into the washing tank, a water level detection means for detecting the water level in the washing tank, and a washing tank. a drainage means for draining water in the tank, a washing means for washing dishes with washing water, an alarm means for notifying in the event of an abnormality, a temperature detection means for detecting the temperature inside the washing tank and the washing water, the water level detection means and the temperature. The water supply means, heating means, cleaning means, and notification means are controlled by inputting the signal from the detection means, and the time until an abnormality in water heating is detected is controlled by changing the temperature difference between the water and the cleaning water at the start of cleaning and the temperature. Dishwashers equipped with control means to