JPH0375032A - Dish washer - Google Patents

Abstract

PURPOSE:To automatically control the washing time and the rinsing repetition by controlling the opening and closing of a water feed valve and the driving and stopping of a pump device with a switch means with a timer mechanism setting the preset washing time. CONSTITUTION:A preset quantity of a detergent is put in the sump section 14 of a washing tank 11, washing objects 18 such as dishes are mounted and held on a storage cage 17, the movable portion 12b of a cover body 12 is closed, and a door switch 31 is closed. A switch with a timer mechanism 30 is operated and set so that the switch 30 is kept in a closed state for a preset period T, then a water feed valve 19 is opened, clean water is fed from a water feed source through a water feed pipe P1, and the drive of a pump device 15 is started to perform washing. Rinses are repeated after washing, the switch with a timer mechanism 30 is opened when blots of washed objects are completely removed, the water feed valve 19 is closed, the pump device 15 is stopped, and the operation of a dish washer 10 is stopped.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a dishwasher, in particular, a washing machine in which water from a water reservoir provided at the bottom of a washing tank is pumped up by a pump device and supplied to an injection nozzle. The present invention relates to a tableware washer that cleans tableware and other objects to be washed using jetted water.

(Prior Art) Conventionally, the above-mentioned tableware washing machine has been disclosed, for example, in
It is disclosed in Publication No. 54148. In the tableware washing machine disclosed in this publication.

A water storage tank that always supplies a predetermined amount of water to a water storage section provided at the bottom of the cleaning tank, and a siphon device that discharges water from the water storage section by a siphon action when the water level in the water storage section exceeds a predetermined water level are provided. There is.

(Problem to be Solved by the Invention) However, in the dishwasher having the above configuration, when draining water, it is necessary to temporarily stop the operation of the pump device that pumps up water from the water reservoir and supplies it to the injection nozzle. During the next rinse, the pump device must be started again. It is extremely troublesome for the user to manually open, stop, and restart such a pump device, and if electrical control is used instead of manual operation, the III control system becomes complicated and costs increase. becomes. Furthermore, if it is desired to selectively change the time and frequency of washing with detergent and rinsing depending on how dirty the dishes are, the control system becomes more complicated and is not suitable for mass-produced products.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a dishwasher that can automatically control the washing time of dishes with a detergent and the number of rinses by a simple switch operation.

(Means for Solving the Problems) In order to solve the above problems, the present invention stores and holds an object to be washed, such as tableware, in a predetermined position inside the object, and sprays water toward the object by supplying a predetermined amount of water. a cleaning tank having an injection nozzle disposed therein and a water reservoir section for storing a predetermined amount of water at the bottom thereof; a pump device for pumping up water supplied to the water reservoir section and supplying the water to the injection nozzle; A water supply pipe that supplies water from a water supply source to the bottom, and one end connected to the bottom of the water reservoir and extending upward, the middle part of which is bent downward at a position corresponding to a predetermined water level at the bottom of the cleaning tank. a drain pipe with the other end led out of the machine; and a water supply valve that is interposed in the water supply pipe, sets the water supply volume of the water supply pipe to be smaller than the water discharge volume of the drain pipe, is always open during cleaning, and is closed after cleaning is completed. The present invention provides a washing machine for dishes, etc., which is equipped with a means for constantly opening the pump device during washing and stopping the pump device after washing is completed.

(Functions and Effects) When using the dishwasher with the above configuration, detergent is poured into the washing tank, the dishes and other objects to be washed are stored and held at a predetermined position in the washing tank, and the opening/closing lid of the washing slide is opened and closed. With the water supply valve closed, open the water supply valve and start driving the pump device. As a result, water from the water supply source flows into the water reservoir of the cleaning tank under the control of the water supply valve and dissolves the previously added detergent. At the same time, by opening the pump device, water containing detergent from the water reservoir is pumped up and supplied to the injection nozzle. In the washing tank, the water jetted from the jet nozzle washes the dishes and other objects to be washed, and the splashed water falls and returns to the water reservoir, where it is pumped up again by the pump device and supplied to the jet nozzle. . During this time, when the water level in the cleaning tank reaches a predetermined water level due to the water supplied from the water supply pipe, the wastewater in the water reservoir flows out from the middle part of the drain pipe, a siphon effect occurs, and the amount of water discharged from the drain pipe increases from the water supplied from the water supply pipe. All the wastewater in the same water basin is discharged because it exceeds the amount of waste water.

On the other hand, the amount of water pumped up by the pump device decreases, and the jetting of water from the jetting nozzle is temporarily stopped, thus completing the first cleaning operation. Next, when the siphon action of the drain pipe disappears due to drainage from the water reservoir, the clean water supplied from the water supply pipe is gradually sucked up into the water reservoir again by the opening of the reservoir pump device and supplied to the injection nozzle. As a result, the clean water jetted from the jet nozzle starts rinsing the object that was previously cleaned with the detergent. When the rinsing water in the cleaning tank reaches a predetermined water level, the siphon action occurs again in the drain pipe in the same manner as above, and all the water in the water reservoir is discharged. Thereafter, when clean water is continuously supplied from the water supply pipe, the above-mentioned rinsing is repeated, and the final rinsing is completed when the water supply valve is closed and the pump device stops opening. In this dishwasher, washing with detergent and rinsing can be performed continuously with simple operations by simply controlling the opening/closing of the water supply valve and the stopping of the pump device at the same time.

Furthermore, in the tableware washing machine of the present invention, an electric fjq control device is provided which controls the opening and closing of the water supply valve and the driving stop of the pump device under the control of a switch means with a timer mechanism that sets a predetermined washing time. If the cleaning time is exceeded, the cleaning time can be appropriately set using the switch means with a timer mechanism, and cleaning with detergent and rinsing can be automatically performed a desired number of times.

Further, in the tableware washing machine of the present invention, the water supply valve is closed when a predetermined amount of water is stored in the water reservoir by opening the water supply valve under the control of the switch means with a timer mechanism. When the manual switch 30 is provided in the electric control device, a predetermined amount of water is supplied to and stored in the detergent put into the water reservoir by operating the manual switch means, and only cleaning with the detergent is performed by driving the pump device. The cleaning can be carried out for a desired period of time depending on the dirtiness of the object to be cleaned. In addition, during this cleaning, if clean water is supplied by opening the mutual valve by operating the manual switch means after cleaning with the detergent is completed, the water level in the cleaning tank will rise to a predetermined water level, and the above-mentioned drain pipe will be drained. A siphon action occurs and the waste water in the water reservoir is discharged, after which rinsing similar to the above can be performed automatically.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. A tableware washing machine 10 according to the present invention, the overall configuration of which is schematically shown in FIG. 1, includes a substantially semi-cylindrical lid 12 above a washing tank 1. The lid body 12 is the cleaning tank 11
It has a fixed part 12a fixed to the upper part of the body and a movable part 12b rotatably provided so as to overlap the fixed part 12a, and the movable part 12b is provided with a handle 12c. A water reservoir 14 is provided in a part of the bottom wall 11a of the cleaning tank 11 and projects downward, and a filter top 3 is removably attached to the boundary between the two. A pump device ML5 is connected to the lower side wall of the water reservoir 14 via a water suction pipe P2, and a discharge pipe P3 connected to the discharge side of the pump device 15 is connected to the bottom M of the cleaning fill.
11a, and an injection nozzle 16 is rotatably attached to the upper part of the pipe P3. The injection nozzle 16 has a large number of injection holes 16a, and when a predetermined amount of water is supplied therein, the injection nozzle 16 rotates around the discharge pipe P3 due to the reaction force of the water pressure. A storage cylinder 17 for placing and holding objects 18 such as tableware is removably installed above the injection nozzle 16, and this storage cylinder is attached to the lid 12.
When the movable part 12b of is opened, it is moved in and out of the cleaning tank 1↓. At the lower right side of the injection nozzle 16 in the figure, a water condensing pipe P1 that supplies clean water from a water supply source (not shown) is assembled to pass through the lower side wall and bottom wall 11a of the cleaning tank 11. A water supply valve 19 is provided to adjust the amount of water supplied into the cleaning tank 11. A flexible drain pipe 21 is connected at one end to a drain port 20 provided at the bottom of the water reservoir 14. This drain pipe 21 extends upward to a position corresponding to a predetermined water level It is installed.

In addition, the middle part of the drain pipe 21 has a drain lever 22 fixed to the front surface of the dishwasher 'a10 so that its position can be adjusted in the vertical direction.
It is normally supported at the upper position (A) in the figure, and is lowered to the lower position (B) only during drainage, which will be described later.

Next, an electric control device for the pump device 15 and the water supply valve 19 will be explained with reference to FIG. This electrical control device includes an actuator 1 that electrically opens and closes a water supply valve 19.
9a (for example, a solenoid) and a door switch 31 that controls power supply to the drive motor 15a of the upper pump device 5.

A switch 30 with a timer S structure is attached to a predetermined position on the front panel of the dishwasher 110.

The door switch 31 is attached to an appropriate position at the upper end of the washing 11 and is arranged to close when the movable portion 12b of the lid 12 is closed. Note that symbols M and N indicate terminals of a commercial power source (not shown). In such an electrical control device, the switch 30 with a timer mechanism is operated with the Sable portion 12b of the lid body 12 closed and the door switch 31 closed to maintain the switch 30 in the closed state for a predetermined period of time. When set as shown, actuator 1
9a opens the water supply valve 19 and the motor 15
The pump device 15 starts collapsing upon activation of step a.

To explain the operation of the dishwasher 10 configured as above, when in use, a predetermined amount of detergent is poured into the water reservoir 14 of the washing tank 11, and the objects 18 to be washed, such as dishes, are placed in the storage 1117 as shown in the figure. When the movable portion 12b of the lid body 12 is closed while it is placed and held, the door switch 31 is closed.

Thereafter, the switch 30 with a timer mechanism is operated and set so that the switch is maintained in the open/closed state for the predetermined time T shown in FIG. As a result, the water supply valve 19 is opened and clean water begins to flow from the water supply source through the water supply pipe Pl, and at the same time, the pump equipment M15 starts to be decommissioned.

The cleaning process will be explained below with reference to FIG. 3 at time t. The process begins at , and water from the water supply pipe PI gradually begins to accumulate in the water reservoir 14 , but when the water level has not reached the water suction pipe P2 position, the pump device 15 does not suck the water and the injection nozzle 16 There is also no water injection from the At time t1, the water level reaches the water suction pipe P2 position, and the pump device 15 sucks the air-infused water through the water suction pipe P2 and sends it to the injection nozzle 1 through the discharge pipe P3.
Send it to 6. At this time, water begins to be jetted from the jetting port 16a, and the jetting nozzle 16 begins to rotate due to the reaction force of this jetting. As the water level in the water reservoir 14 rises, the amount of water sucked by the pump device increases and the rotational speed of the injection nozzle increases.

At time t2, the water level rises to a position where the pump device 15 sucks only water, and the rotational speed of the injection nozzle remains constant (1
1! It becomes v0.

When the water level in the water reservoir 14 further rises and reaches a predetermined water level X above the middle part of the drain pipe 21 at 2 hours t3, the middle part of the drain pipe 21 is filled with water due to the water level difference between the water surface and the middle part. As a result, the air in the drain pipe 21 is expelled,
A siphon effect occurs due to the drop between the bottom of the water reservoir 14 and the outlet outside the machine, and therefore the water in the water reservoir 14 is discharged to the outside of the machine through the drain pipe 21. At this time, since the drainage speed of the drain pipe 21 is set higher than the water supply speed from the water supply pipe 19, the water in the water reservoir 14 begins to decrease rapidly. Note that at this point, the rotational speed of the upper injection nozzle 6 is a constant value V. It is. When the water level drops to the position of the suction pipe P2 at time t4 and the pump device 15 begins to draw in air, the rotational speed of the injection nozzle begins to rapidly decrease and stops at time t5. When the water level drops to the bottom of the water reservoir 14, air is sucked into the drain pipe 21 from the drain port 20, and the drain pipe 21
When air accumulates in the middle part of 1, the siphon effect disappears.

Due to this drainage action, water containing detergent and dirt is discharged to the outside of the dishwasher 10, and the washing operation using the detergent is completed.

As the siphon action disappears, the drain pipe 21 returns to its initial state, but water continues to be supplied during this time, so the water reservoir construction 4
At time t6, the water level reaches the water suction pipe P2 position, and the pump device 15 again starts sucking the air-infused water, and the injection nozzle 16 begins to rotate accordingly.

Furthermore, as the water level rises, pump device 1 at time t7
5, only water is sucked, and the rotational speed of the injection nozzle is also a constant value V. become. In addition, when the water is drained, the pump device 1
5, the discharge pipe P3, and the injection nozzle 16 due to the rotation of the pump device 15, the time t6-t5 during which water is not injected is the initial injection waiting time tl-to. The start-up time t7-t6 of the rotation of the injection nozzle top 6 is also shorter than the start-up time t2-t1 of the first rotation.

As the rinsing progresses and reaches time t8, a siphon action occurs as in the previous washing process and drainage starts, and after time t9, the drainage ends at time tlo, and the first rinse is completed. Subsequently, rinsing is repeated in the same way, and when the dirt on the object to be washed is completely removed, the switch 3 with a timer mechanism is activated.
0 is opened, the water supply valve 19 is closed, the pump device 15 is stopped, and the operation of the dishwasher 10 is stopped.

By the way, if the operation of the washer 10 is stopped before draining water, water will remain in the water reservoir 14, but in this case, if the drain lever 22 is lowered to the lower position (B), the remaining water can be drained. can do. Alternatively, if water is further introduced into the cleaning tank 11 to make the water level equal to or higher than the predetermined water level X, the water in the water reservoir 14 can be drained by the siphon action of the drain pipe 21.

In carrying out the present invention, if the intermediate portion of the drain pipe 21 is supported at a desired intermediate position by operating the drain lever 22, the amount of water stored in the water reservoir 14 during cleaning can be adjusted appropriately, and the The cleaning time can be appropriately shortened and the number of rinses can be increased.

Further, in the above embodiment, the flexible drain pipe 21 is used, and the middle part of the drain pipe is lowered by operating the drain lever 22 to drain the water in the water reservoir 14.
Alternatively, a fixed siphon tube may be used,
In this case, a drain valve may be attached near the drain port 20 of the siphon pipe, and the water in the water reservoir 14 may be drained by manually opening the drain valve.

Furthermore, in the above embodiment, the opening/closing of the water supply valve 19 and the driving stop of the pump device 15 are automatically controlled under the control of the switch 30 with a timer mechanism, but instead of the switch 30 with a timer mechanism, manual operation is performed. Use a switch or
Alternatively, the water supply valve 19 may be opened and closed and the pump device 15 may be manually stopped. Even in such a case, detergent cleaning and rinsing can be performed continuously with simple operations.

Next, FIG. 4 shows a modification of the opening circuit in the above embodiment.
To explain with reference to FIG. 5, in this modification,
A feature is that a manual switch 32 is provided between the timer mechanism switch 30 and the actuator 19a. The manual switch 32 is closed by the user after setting a predetermined cleaning time T using the timer switch 30.

As a result, the actuator 19a becomes conductive and the water supply valve 19
is opened and water is supplied into the water reservoir section 14.

At this time, the user checks the water level in the water reservoir 14 and when it reaches the desired water level (the water level below the above-mentioned predetermined water level X),
Open manual switch 32. Thus, in the cleaning tank 10, cleaning with the detergent is continuously performed by driving the pump device 15 for a predetermined time depending on the degree of dirt on the object 18 to be cleaned, and after the cleaning is completed, the operator turns the manual switch 3 again.
2 is closed, the process moves to rinsing in the same manner as described above, and rinsing is performed within a predetermined time T.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing a schematic configuration of a dishwasher according to the present invention, Fig. 2 is a drive circuit diagram of the dishwasher, and Fig. 13 is a diagram showing the relationship between the rotational speed of the injection nozzle and the cleaning time. , FIG. 4 is a diagram showing a modification of the opening operation circuit of the same dishwasher, and FIG. 5 is a diagram showing the relationship between the rotational speed of the injection nozzle and the cleaning time in the same modification. Explanation of symbols 14... Water reservoir section, 15... Pump device, 16...
Injection nozzle, 19... Water supply valve, 21... Drain pipe

Claims (3)

[Claims] (1) An object to be washed, such as tableware, is housed and held at a predetermined position inside the object, and a spray nozzle is provided to spray water toward the object to be washed by supplying a predetermined amount of water, and a predetermined amount of water is stored at the bottom of the nozzle. In a dishwasher equipped with a washing tank provided with a water reservoir and a pump device for pumping up water supplied to the water reservoir and supplying the water to the injection nozzle, water from a water supply source is supplied to the bottom of the washing tank. A water supply pipe is connected at one end to the bottom of the water reservoir, extends upward, bends its middle part downward at a position corresponding to a predetermined water level at the bottom of the cleaning tank, and leads the other end out of the machine. a water supply valve that is interposed in the water supply pipe and sets the water supply volume of the water supply pipe to be lower than the drainage volume of the drain pipe, and is always open during cleaning and closed after the cleaning is completed; A dishwasher, etc., characterized by being provided with means for constantly operating and stopping after washing is completed. (2) An electric control device is provided for controlling the opening and closing of the water supply valve and the driving stop of the pump device under the control of a switch means with a timer mechanism that sets a predetermined cleaning time. 1) Dishwasher. (3) When a predetermined amount of water is stored in the water reservoir by opening the water supply valve under the control of the switch means with a timer mechanism, the manual switch means for closing the water supply valve is controlled by the electric control. The tableware washing machine according to claim 1, characterized in that the dishwashing machine is provided in an apparatus.