JPH0440932A - Tableware washing machine - 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 mainly used in households.

BACKGROUND OF THE INVENTION Dishwashers conventionally used in households have a washing tank for storing and washing dishes, a water supply pipe connected to the washing tank and sending water from the water supply into the washing tank, and a water supply pipe connected to the water supply pipe. A solenoid valve that adjusts the water supply, a washing pump that sprinkles water on the washing tank and washes the dishes, a drainage pump that discharges the water in the washing tank to the outside of the machine via a drainage path, and a solenoid valve, washing pump, and drainage. It is configured with a controller that controls the pump.

The operation of the dishwasher having this configuration will be explained below with reference to FIG. When the dishwasher starts operating, water supply process 1 is started. That is, the solenoid valve opens, water is supplied from the water supply pipe, and an appropriate amount of water accumulates in the cleaning tank. In the next washing step 2, the water accumulated at the bottom of the washing tank is pumped up by a washing pump, and water is sprinkled into the washing tank to wash the tableware contained therein.

Upon completion of the cleaning process 2, a drainage process 3 is executed.

At this time, the solenoid valve, washing pump, and drain pump are controlled by the controller.

Problems to be Solved by the Invention The conventional dishwasher described above has the following sanitary problems. That is, when the cleaning step 3 is completed and the drain pump is stopped, the water present in the drain pipe flows back from the drainage path to the bottom of the cleaning tank and remains at the bottom of the cleaning tank. Moreover, water remains in the washing pump casing due to the stopping of the washing pump. This residual water remains until the next time the dishwasher is run. Therefore, if the operation interval is long, food residue mixed in the residual water will rot and bacteria will multiply. When the next operation is started in this state, bacteria that have grown in this residual water will circulate within the cleaning tank.

The present invention solves the problems of the conventional configuration, and the first objective is to provide a clean dishwasher in which bacteria that breed in residual water do not circulate in the washing tank. The purpose is The second objective is to provide a clean dishwasher that does not breed bacteria in residual water.

Means for Solving the Problems In order to achieve the first object, the dishwasher of the first invention includes a washing tank for storing and washing dishes, and a washing tank connected to the washing tank to send water from a water supply into the washing tank. A water supply pipe, a solenoid valve connected to the water supply pipe to adjust the water supply, a washing pump that sprinkles water on the washing tank and washes the dishes, and a drain that discharges the water in the washing tank to the outside of the machine via a drainage path. It has a controller that controls a pump, a solenoid valve, a cleaning pump, and a drainage pump, and has a process for supplying and draining water to the cleaning tank immediately before starting cleaning, and discharging residual water in the cleaning tank to the outside of the machine. In addition, a dishwasher according to a second invention to achieve the second object includes a washing tank for storing and washing dishes, a water supply pipe connected to the washing tank and sending water from a water supply into the washing tank, and a water supply pipe. a solenoid valve that is connected to and adjusts the water supply, a washing pump that sprays water into the washing tank and washes the dishes, a drain pump that discharges the water in the washing tank to the outside of the machine via a drainage path, and a solenoid valve/washing pump that is connected to the washing tank to adjust the water supply. It has a controller that controls the pump and drain pump, and has a process of supplying water to the cleaning tank again immediately after cleaning is completed and draining the remaining water to the outside of the machine.

According to the first aspect of the invention, a step is provided immediately before starting the washing process to discharge residual water in which bacteria have grown from the previous operation of the dishwasher to the outside of the machine, and when the washing pump operates, bacteria in the remaining water are removed. can be prevented from circulating in the cleaning tank. Further, according to the second invention, a step is provided to discharge residual water from the operation of the dishwasher to the outside immediately after washing is completed,
Food residues, which serve as a food source for bacteria, can also be discharged along with the water. Therefore, it is possible to prevent the proliferation of bacteria in the residual water.

EXAMPLE A first example of the present invention will be described below with reference to FIG. In the figure, reference numeral 1 is a washing tank that accommodates and washes tableware. A washing pump 2 is provided at the bottom of the washing tank 1, which sucks water from the bottom of the washing tank 1 and sprinkles water into the washing tank 1 to wash the tableware stored therein. Further, on the side surface of the cleaning tank 1, an electromagnetic valve 3 is provided, one end of which is connected to a water supply pipe 4 connected to a water supply (not shown), and which adjusts the water supply. Reference numeral 5 denotes a drainage pump that sucks water from the bottom of the cleaning tank 1 and drains it to the outside of the machine via a drainage path 7. In addition, 6 in the figure shows the solenoid valve 33, cleaning pump 2, and drain pump 5.
It is a controller that controls the

The operation of this embodiment will be explained below with reference to FIG.

When a switch (not shown) is turned on to start operation of the dishwasher, first, water supply step 1 is started. That is, water is supplied from the tap via the solenoid valve 3 or the water supply pipe 4, and an appropriate amount of water accumulates at the bottom of the cleaning tank 1. This water supply step 1 and the subsequent drainage step 2 are steps for draining residual water accumulated at the bottom of the cleaning tank 1 at the end of the previous operation of the device to the outside of the machine. That is, in the drainage process 2, the drainage pump 5 is operated, and the residual water from the previous operation is sucked from the bottom of the cleaning tank 1 together with the water supplied in the water supply process 1, and is discharged to the outside of the machine via the drainage path 7. . When this drainage process 2 is completed and the operation of the drainage pump has stopped, the water supply process 3 is resumed.
is started. This water supply step 3 and the subsequent washing step 4
- Draining process 5 is a conventional process for dishwashers, and its explanation will be omitted. The operations of the solenoid valve 4, washing pump 2, and drain pump 5 described above are controlled by a controller 6.

As described above, according to this embodiment, the residual water after the previous use of the dishwasher is discharged to the outside of the dishwasher immediately before entering the washing step 4. Therefore, the bacteria that have grown in the residual water are discharged to the outside of the machine together with the residual water, and the bacteria do not circulate inside the cleaning tank 1.

Therefore, the inside of the washing tank 1 is free from bacterial contamination, making it possible to provide a clean dishwasher.

Next, a second embodiment of the present invention will be described. Unlike the first embodiment, this embodiment does not include a process of supplying and draining water to the cleaning tank immediately before starting cleaning and discharging the residual water in the cleaning tank to the outside of the machine. This system has a process for supplying water to the machine and draining the remaining water to the outside of the machine after cleaning. Note that the overall configuration is the same as that of the first embodiment, so a description thereof will be omitted.

The operation of this embodiment will be explained below with reference to FIG. In this embodiment, a water supply process 4 and a drainage process 5 are provided following the water supply process 1, washing process 2, and drainage process 3, which are the processes of a conventional dishwasher. That is, at the stage when the drainage process 3 is completed and the drainage pump 3 is stopped, the water supply process 4 is started again. In the water supply process 4, the solenoid valve 3 opens and the water supply pipe 4
Water is supplied from the tap via the cleaning tank 1, and an appropriate amount of water accumulates at the bottom of the cleaning tank 1. In the next drainage step 5, the accumulated water is sucked from the bottom of the cleaning tank 1 by the drainage pump 3 together with the residual water at the end of cleaning, and is discharged to the outside of the machine via the drainage path 7.

As described above, according to this embodiment, the residual water mixed with food residue, which is a breeding ground for bacteria, is discharged to the outside of the machine immediately after cleaning is completed, so that the reproduction of bacteria in the residual water can be prevented. be. Therefore, as in the first embodiment described above, it is possible to obtain a clean dishwasher free from contamination due to bacterial circulation within the washing tank.

The experimental results of the first and second embodiments and a comparative example using a conventional dishwasher are as follows.

Coat the dishes with food and place them in the dishwasher (National N
P-5500). Second, after washing is completed, the dishwasher is left for two days, and the number of bacteria contained in the residual water in the washing tank of the dishwasher is measured. The food to be coated at this time is cooked rice (
1g x 6), miso soup (30ml x 6), curry roux (4
gx6), egg yolk (2gx6), Japanese tea (20mlx6)
It is. In addition, when washing in a dishwasher, use the standard washing cycle and use detergent for dishwashers (Hi-Wossini Blue) 10
g was used.

The number of bacteria was determined as the geometric mean value of six measurements.

Effects of the Invention As is clear from the above explanation, according to the first means of the present invention, there is provided a washing tank for storing and washing dishes, and a water supply connected to the washing tank and sending water from the water supply into the washing tank. a pipe, a solenoid valve connected to the water supply pipe to adjust the water supply, a washing pump that sprinkles water on the washing tank to wash dishes, and a drainage pump that discharges water in the washing tank to the outside of the machine via a drainage path. , has a controller that controls the solenoid valve, cleaning pump, and drain pump, and has a process that supplies and drains water to the cleaning tank immediately before starting cleaning, and drains the residual water in the cleaning tank to the outside of the machine. This makes it possible to realize a clean dishwasher in which the propagated bacteria do not circulate in the washing tank. According to a second aspect of the present invention, there is provided a washing tank for storing and washing tableware, a water supply pipe connected to the washing tank and sending water from the water supply into the washing tank, and a water supply pipe connected to the water supply pipe for adjusting the water supply. A solenoid valve that sprays water into the washing tank to wash the dishes, a washing pump stop that sprays water into the washing tank to wash the dishes, a drain pump that discharges the water in the washing tank to the outside of the machine via a drainage path, and controls the solenoid valve, washing pump, and drainage pump. By having a controller that supplies water to the washing tank again immediately after washing is completed and draining the remaining water from the washing machine to the outside of the machine, a clean dishwasher with no bacterial growth in the remaining water is achieved. It is something that can be done.

[Brief explanation of drawings]

Fig. 1 is a loading diagram showing the configuration of the dishwasher of the first and second inventions, Fig. 2 is an operating process diagram of the dishwasher showing an embodiment of the first invention, and Fig. 3 is the same. FIG. 4 is an operating process diagram of a dishwasher according to the second embodiment of the invention, and FIG. 4 is an operating process diagram of a conventional dishwasher. 1... Washing tank, 2... Washing pump, 3... Solenoid valve, 4... Water supply pipe, 5... Drainage pump, 6... Controller 7... Drainage route. Name of agent Patent attorney Shigetaka Awano (1 person) Figure 2 Figure 1 Figure 3 Figure 2 Figure 1 Figure 3 Figure 3

Claims (2)

[Claims] (1) A washing tank for storing and washing dishes, a water supply pipe connected to the washing tank and sending water from the water supply into the washing tank, a solenoid valve connected to the water supply pipe and regulating the water supply, and a solenoid valve connected to the water supply pipe to adjust the water supply; It has a washing pump that sprays water to wash the dishes, a drainage pump that discharges the water in the washing tank to the outside of the machine via a drainage path, and a controller that controls the solenoid valve, washing pump, and drainage pump,
A dishwasher that has a process for supplying and draining water to the washing tank immediately before starting washing, and discharging residual water in the washing tank to the outside of the machine. (2) A washing tank for storing and washing dishes, a water supply pipe connected to the washing tank and sending water from the water supply into the washing tank, a solenoid valve connected to the water supply pipe and regulating the water supply, and a solenoid valve connected to the water supply pipe to adjust the water supply; It has a washing pump that sprays water to wash the dishes, a drainage pump that discharges the water in the washing tank to the outside of the machine via a drainage path, and a controller that controls the solenoid valve, washing pump, and drainage pump,
This dishwasher is equipped with a process for supplying water to the washing tank again immediately after washing is completed and draining the remaining water outside the machine.