JPH0525571Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention performs a washing operation using a cleaning liquid stored in a washing tank, followed by a rinsing operation using high-temperature rinsing water stored in an open heating tank. Regarding dishwashing machines.

(Prior Art) The conventional dishwasher of the type described above has an open heating tank (referred to as a booster).
Most automatic water supply mechanisms are equipped with what is commonly called a ball tap, which is designed to immediately replenish water in response to a drop in water level.

(Problem that the invention aims to solve) In such a model, replenishment water is supplied to the booster at the same time as the rinsing process of the washing machine starts, and as a result, the rinsing water, which has been heated to 85°C in the booster, has a temperature of 50°C.
The supplementary water supply at a low temperature of about
There was a problem that the rinsing water outlet temperature decreased and preheating and drying immediately after rinsing was delayed.

The present invention has been developed to address these conventional problems, and by starting the supply of supplementary water to the booster immediately after the completion of the rinsing operation, the high temperature of the rinsing water can be reduced. The purpose is to maintain and improve preheating drying efficiency.

(Means for Solving the Problems) As is clear with reference to the attached drawings, the present invention provides cleaning in which cleaning liquid stored in a cleaning tank 1 having an overflow port 4 is circulated and fed to an upper cleaning chamber 3. In a dishwasher that performs a rinsing operation in which, following operation, high-temperature rinsing water stored in an open-type heating tank 2 with a built-in heater is sent to the washing chamber 3 and collected in the washing tank 1, a predetermined capacity is reached. A full water level detector 13 and a low water level detector 14 capable of detecting the corresponding full water level and low water level are attached to the heating tank 2, and a water supply solenoid valve 15 is connected to the water supply line that supplies water to the heating tank 2. Furthermore, a low water level detector 1 is installed during the period from the start to immediately after the end of the initial hot water supply to the washing tank 1 performed before the start of the washing operation, and immediately after the end of the rinsing operation.
4 detects a low water level, the water supply solenoid valve 15 is opened, and when the full water level detector 13 detects the full water level, the water supply solenoid valve 15 is closed. In the detector 13,
The dishwasher is provided with an electromagnetic valve control means 16 that closes the water supply electromagnetic valve 15 regardless of the water level detected in the dishwasher.

(Function) According to the present invention, even if the amount of water in the heating tank 2 (booster) is insufficient, the booster 2 is not refilled unless the initial hot water supply to the cleaning tank 1 is completed or the rinsing operation is completed. This means that a drop in the outlet temperature during the rinsing operation is avoided, and the intended objective is thus achieved here.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

In Fig. 1, the inside of the washing machine main body is watertightly partitioned into two chambers, upper and lower. , a rinse pump 6, a detergent feeder 9, a rinse feeder 10, and other necessary equipment are housed in a machine room.

In the upper chamber, a washing arm 7 and a rinsing arm 8 are installed horizontally at opposite locations in the upper and lower parts.
The cleaning liquid and the rinsing liquid can be spouted from nozzles provided on each arm 7 and 8,
The cleaning arm 7 is connected to the discharge part of the cleaning pump 5 by piping, while the rinsing arm 2 is connected to the discharge part of the rinse pump 6 by piping.

The cleaning tank 1 has an overflow port 4 opened at a level higher than a predetermined water level determined by a water level detector (not shown), and a suction port 4 with a suction port strainer 11 interposed at the bottom thereof. This suction port is connected to the suction portion of the cleaning pump 5 through piping.

The washing machine main body is further provided with a booster 2 attached to the side thereof, and is formed so that a necessary amount of rinsing water can be stored in the booster 2, and is heated by an electric heater or the like (not shown). It has a built-in container that can heat the stored rinsing water to a high temperature, for example 85 degrees Celsius.

The peripheral wall of the booster 2 has a heat-insulating structure, and the high-temperature rinsing water can be kept warm without releasing heat.

The booster 2 above is a water supply pipe 1 as a water supply line.
For example, the water supply pipe 12 is equipped with a water supply solenoid valve 15 for intermittent water supply. A corresponding high water level detector 13 and low water level detector 14 are attached.

Both of the water level detectors 13 and 14 are known computerized level detectors powered by a low voltage of about 6V, and have two electrode rods made of metal rods extending parallel to each other at a close distance. Each electrode is arranged so that it can come into contact with water at a predetermined water level in the tank, and it electrically detects whether or not there is a water phase as a resistor between the electrode rods and outputs an on or off electrical signal. Formed to obtain.

The electromagnetic valve control means 16, which uses the water level signals of the water level detectors 13 and 14 as input elements to transmit a control output for opening and closing the water supply electromagnetic valve 15, is an element of the present invention. 1
Although it is shown as a block in the figure, its function is explained as follows: The low water level detector 14 detects a lack of water in the booster 2, and the time of this detection is immediately after the desired hot water supply, which will be described later, or immediately after the completion of the rinsing operation. In either case, an ON output is generated to energize the solenoid of the water supply solenoid valve 15 and open the valve.
When the full water level detector 13 detects the full amount of water in the booster 2, it issues an off output to de-energize the solenoid of the water supply electromagnetic section 15 and close the valve.

The operating mode of the dishwasher having the above-mentioned configuration will be explained below with reference to the flowcharts shown in Figure 2 A and B. First, Figure 2 A shows the preparation process before starting the main operation. After turning on the preparation switch, the door for loading and unloading the cleaning chamber 3 containing the items to be cleaned is closed.

Next, the water level detector detects whether there is enough water in the cleaning tank 1. Since it is natural that the water level is insufficient, next check whether the water level in the booster 2 is also sufficient. When the water level is detected by the water level detector 13 and reaches the full water level by replenishing water, the rinsing pump 6 is operated.

By operating this rinse pump 6, the booster 2
The high temperature water inside passes through rinsing arm 8 and is then sent to cleaning tank 1.
However, the rinse pump 6 is stopped when a preset timing (T ₁ ), for example, 17 seconds has elapsed based on the relationship between the supply capacity of the rinse pump 6 and the storage amount of the cleaning tank 1. First, wait for the time required for the temperature of the water stored in booster 2 to reach 85℃ (T ₂ ), for example, 300 seconds, and then repeat the steps again, but until the cleaning tank 1 is full. When this occurs, additional hot water is supplied to the step ports ' to ' to ensure the amount of water up to the overflow port 4, and then the water supply solenoid valve 15 is opened and the water level is detected when the water level of the booster 2 reaches the full water level. When the water supply solenoid valve 15 is detected by the device 13, the water supply solenoid valve 15 is closed.
After energizing the heater of booster 2, checking whether the water temperature has reached 85°C, and de-energizing the heater, the buzzer indicating that preparation is complete will sound for a predetermined number of seconds (T ₃ ), for example, 2 seconds, thus completing the preparation process. The main operation process shown in Figure 2B begins.

The cleaning pump 5 is driven by turning on the operation switch or by performing a start command operation to close the loading/unloading door during automatic operation.

The cleaning tank 1 is cleaned by driving the cleaning pump 5.
The cleaning liquid at 65° C. is sprayed onto the object to be cleaned in the cleaning chamber 3 by the cleaning arm 7, so that cleaning is achieved.
The cleaning liquid used for cleaning is returned to the cleaning tank 1, and a cleaning liquid is produced by circulating the liquid.

Simultaneously with this cleaning operation, a detergent feeder 9 and a rinse feeder 10, which are activated by sensing the discharge pressure of the cleaning pump 5, feed a fixed amount of detergent into the cleaning tank 1 and a rinsing agent into the booster 2, respectively.

When it is checked that the time required for the cleaning operation (T ₄ ) seconds, for example 85 seconds, has elapsed, the cleaning pump 5 is stopped, and at a predetermined (T ₅ ) second, for example 3 seconds, the water temperature is checked. After a process has been carried out to determine whether or not the heater should be operated in the booster 2, the next rinsing process is started.

That is, the rinse pump 6 is driven, and the high-temperature rinse liquid in the booster 2 is jetted from the rinse arm 8 into the cleaning chamber 3 to rinse the cleaned object.

After continuing this for a predetermined time (T ₆ ) seconds required for rinsing, for example 12 seconds, the rinsing pump 6 is stopped.

The rinsing operation is thus completed, and the high-temperature rinsing liquid after rinsing is collected in the washing tank 1 and replaced with the same amount of detergent liquid in the tank 1. During this period, the water level in the booster 2 is lowered and the low water level detector 14 Even if the system detects a low water level, supplementary water will not be supplied.

After confirming that the rinse pump 6 has stopped, the water supply solenoid valve 15 is opened, the full water level is checked by the full water level detector 13, and the water supply solenoid valve 15 is closed, and the supplementary water supply process is completed. Buzzer sounds to complete the cleaning and rinsing cycle ( _T7 )
Let it run for seconds, for example 2 seconds.

The operation of the step pumps described above corresponds to the operation of the electromagnetic valve control means 16.

(Effects of the invention) As explained above, the present invention provides that even if the amount of water stored in the booster 2 decreases, it will not flow into the booster 2 unless it is during the intended hot water supply or immediately after the completion of the rinsing operation. By not supplying water, the hot water used for rinsing can be maintained at a predetermined high temperature and not allowed to drop, improving preheating drying efficiency, speeding up the cleaning process, and eliminating water droplets. The cleaning effect is enhanced by eliminating the residue.

[Brief explanation of the drawing]

FIG. 1 is a structural diagram according to an embodiment of the present invention, and FIGS. 2A and 2B are flow charts showing the operating mode of the cleaning cycle. 1...Cleaning tank, 2...Heating tank, 3...
Cleaning chamber, 4... Overflow port, 13... Full water level detector, 14... Low water level detector, 15... Water supply solenoid valve, 16... Solenoid valve control means.

Claims (1)

[Scope of utility model registration request] Following a cleaning operation in which cleaning liquid stored in a cleaning tank 1 having an overflow port 4 is circulated and fed to an upper cleaning chamber 3, high-temperature rinsing water stored in a heating tank 2 having a built-in heater is supplied to the cleaning chamber 3. In a dishwasher that performs a rinsing operation in which water is sent to the washing tank 1 and collected in the washing tank 1, a full water level detector 13 and a low water level detector 14 capable of detecting a full water level and a low water level corresponding to a predetermined capacity are installed in the heating tank. 2, and a water supply solenoid valve 15 is interposed in the water supply line that supplies water to the heating tank 2, and further, from the start of the initial hot water supply to the cleaning tank 1 performed before the start of the cleaning operation to immediately after the end. Immediately after the completion of the rinsing operation, the water supply solenoid valve 15 is opened when the low water level detector 14 detects a low water level, and the water supply solenoid valve 15 is opened when the full water level detector 13 detects the full water level. A dishwasher characterized by being provided with a solenoid valve control means 16 that closes the water supply solenoid valve 15 and also closes the water supply solenoid valve 15 during the rinsing operation regardless of the water level detected by the detectors 13 and 14. .