JPH0520283Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Field of industrial application) The invention combines a washing cycle and a rinsing cycle into one cycle.
The present invention relates to a switching mechanism for switching and supplying a washing liquid and a rinsing liquid in a dishwasher that mechanically washes dishes one cycle at a time.

(Prior Art) A cleaning chamber 2 equipped with a spray nozzle 5, a cleaning liquid tank 3 communicating with the cleaning chamber 2 and disposed in the lower part, a rinsing liquid tank 4 disposed near the cleaning chamber 2, It has a pump 6 whose discharge port is connected to the liquid nozzle 5, and an electromagnetic switching valve 7 for switching and connecting the liquid feeding ports of the cleaning liquid tank 3 and the rinsing liquid tank 4 to the suction port of the pump 6, First, the cleaning liquid in the cleaning liquid tank 3 is ejected from the jet nozzle 5 and is applied to the dishes, and then collected in the cleaning liquid tank 3 and spouted again, and the rinsing water in the rinsing liquid tank 4 is jetted through the jet nozzle 5. The applicant has previously proposed a dishwasher that automatically washes dishes by sequentially performing a rinsing cycle in which the entire amount is jetted out to rinse the dishes, and its basic structure is as shown in Figure 1. be.

By the way, the above-mentioned one is the second one of the electromagnetic switching valve 7.
The two inlet ports are connected to the liquid feed ports provided at the bottoms of the cleaning liquid tank 3 and the rinsing liquid tank 4 through pipes, respectively. The liquid feeding port is covered with a strainer or the like to prevent the liquid from flowing into the liquid feeding port.

(Problem to be solved by the invention) By interposing the strainer in this way, large foreign objects were prevented from entering the valve of the electromagnetic switching valve 7, but small foreign objects passed through the strainer. In many cases, the liquid does not flow completely and accumulates in the cleaning liquid tank 3, which eventually develops into sludge-like slime that flows into the valve body.
Problems such as the valve not being able to switch smoothly and being particularly unhygienic were unavoidable, and improvements were desired.

Furthermore, even if you try to periodically clean the inside of the main body of the electromagnetic switching valve 7, the switching valve 7 is fixedly connected using piping, which makes it difficult to install and remove, making maintenance time-consuming. Due to the fact that the inside of the valve is not easy to clean, there are many cases in which the inside of the valve is left unmaintained, which is extremely unsanitary.

The present invention was devised in view of the fact that the above-mentioned device is desired to be improved in terms of hygiene and maintenance. The purpose is to improve cleaning efficiency and maintain hygiene by preventing contamination inside the valve by devising its structure and arrangement so that it is visible to the naked eye. shall be.

(Means for Solving the Problems) Accordingly, the present invention provides a cleaning liquid tank 3 that communicates with a cleaning chamber 2 equipped with a jet nozzle 5 and disposes a cleaning liquid tank 3 in the lower part of the cleaning chamber 2, and a rinsing liquid tank 4 that is connected to the cleaning chamber 2. The outflow port 7C of a 3-port 2-position electromagnetic switching valve 7 is connected to the suction port of a pump 6 whose discharge port is connected to the jet nozzle 5. A dishwasher in which the first inflow port 7A of the electromagnetic switching valve 7 is connected to the liquid feeding port 3A of the cleaning liquid tank 3, and the second inflow port 7B is connected to the liquid feeding port 4A of the rinsing liquid tank 4, respectively. Then, the liquid feeding port 3A of the cleaning liquid tank 3 is opened in the side wall at a higher level than the position where the drain port 10 of the tank 3 is opened, while the electromagnetic switching valve 7 is opened.
is a bellows type direct acting electromagnetic valve in which a boot 7E made of a bellows is integrally connected to the back of the valve, and the boot 7E exists in a valve chamber facing the first inflow port 7A and the second inflow port 7B, respectively. In addition, the first inflow port 7A is directly connected to the liquid feeding port 3A of the cleaning liquid tank 3.

(Function) In the present invention, the first inflow port 7A of the electromagnetic switching valve is directly attached to the side wall at a higher level than the drain port of the cleaning liquid tank 3, and a boot 7E made of a bellows is installed in the valve chamber facing the inflow port 7A. Because of this, the valve chamber facing the first inflow port 7A is open to the atmosphere and can be seen directly from inside the cleaning liquid tank 3.

Therefore, the degree of contamination can be accurately confirmed, the inside of the cleaning liquid tank 3 can be easily cleaned, and the washed out contaminated liquid can be discharged through the lower drainage port without flowing back.

In addition, since the first inflow port 7A opens at a higher level than the drain port, it is possible to prevent viscous sediment similar to sludge accumulated at the bottom of the cleaning liquid tank from entering the switching valve 7, and The attachment/detachment operation is also easy because it is directly attached.

(Example) Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic mechanical diagram of a dishwasher according to an embodiment of the present invention. A cleaning liquid tank 3 consisting of a two-tiered bottom with a shallow bottom and a deep bottom placed in communication with the cleaning chamber 2; a rinsing liquid tank 4 placed side by side on the side of the cleaning chamber 2; Each jet nozzle 5, 5 for lower jetting, side jetting, and upper jetting
5. A pump 6 whose discharge port is connected to the liquid jet nozzle 5 through piping _P1 , and a first inflow port 7A is directly connected to the liquid feed port 3A provided on the side wall at the deep bottom of the cleaning liquid tank 3, Pipe P ₂ to liquid feed port 4A of
while connecting the second inflow port 7B via the
The inlet port 7C is connected to the suction port of the pump 6 via piping P ₃ , and the 3-port 2-position electromagnetic switching valve 7 is attached to the cleaning liquid tank 3. It consists of

As shown in detail in FIGS. 2 and 3, in the cleaning liquid tank 3, a strainer 14 is attached to a vertical shaft 17 for supporting a turntable 16, for dividing the inside of the tank into upper and lower two-phase regions of a shallow bottom part and a deep bottom part. A strainer 15 is fitted and placed horizontally in the shallow bottom portion, and a strainer 15 is disposed surrounding the liquid feeding port 3A, and a drain port 10 is opened in the bottom wall of the deep bottom portion. 3A is opened in the side wall at a higher level than the opening position of the drain port 10 and as low as possible.

Further, the cleaning liquid tank 3 is fixed to a mounting portion formed by passing through a hole provided in the strainer 14 provided at the shallow bottom and a recessed portion formed directly below the hole so as to communicate with the drain port 10. The tank has an overflow pipe 12 which is raised upright.

The overflow pipe 12 has a circumferential wall at the lower end of the pipe that also serves as a water faucet for cutting off communication between the drain port 10 and the inside of the deep bottom.
0, and is placed upright with the second
In the inserted state shown in the figure, the drain port 10 communicates with the overflow pipe 12 and is blocked in the deep bottom, so that the discharge of the cleaning liquid stored in the cleaning liquid tank 3 is completely stopped, and on the other hand, Overflow pipe 12
The inside of the pipe is connected to a drain port 10, and when the overflow pipe 12 is pulled up and the lower end of the pipe is removed from the drain port 10, the entire amount of liquid in the cleaning liquid tank 3 is discharged from the drain port 10.

In FIG. 1, reference numeral 8 indicates a hot water pipe having a solenoid valve 9 in the middle, and reference numeral 11 indicates a water supply pipe for setting the liquid level in the cleaning liquid tank 3 to a predetermined position slightly lower than the opening position (overflow level) of the overflow pipe 12. Water level detector, 1
3 is a water level detector for setting the liquid level in the rinse tank 4 to a predetermined position, and L is a rack for storing tableware and placing it on the turntable 16.

As shown in FIG. 3, the electromagnetic switching valve 7 has a chamber facing the outflow port 7C in the center of the cylindrical valve body, and the two sides sandwiching the chamber. Each valve has a built-in valve chamber and a valve chamber facing the first inflow port 7A and a valve chamber facing the second inflow port 7B, and the two valves are connected by a rod and directly connected to the movable solenoid piece of the solenoid valve. Both valves have bellows boots 7E, 7E integrally connected to the back on the opposite side from the valve seat, and the ends of the boots 7E are connected to the valve body. It has a structure in which it is attached to both ends and exists in the valve chamber facing the first inflow port 7A and the valve chamber facing the second inflow port 7B, respectively, and the first inflow port 7A is connected to the body of the valve body. Open it in an appropriate place,
A second inflow port 7B and an outflow port 7C are opened on opposite sides of the body.

Then, the first inflow port 7A of the electromagnetic switching valve 7 is directly connected to the liquid feeding port 3A of the cleaning liquid tank 3 using a nipple 18 and a ring-shaped packing 19, and the second inflow port 7B is connected to the rinsing liquid tank. The outflow port 7C of the liquid feeding port 4A of the pump 4 is connected to the discharge port of the pump 6 via piping, respectively.

The dishwasher with the configuration described above is shown in Figures 1 and 2.
As shown in the figure, after the overflow pipe 12 is set up at a predetermined position and the tableware C is accommodated in the rack L on the turntable 16 in the washing chamber 2, the water level is set in the washing liquid tank 3 by the water level detector 11. A cleaning solution consisting of warm water is stored until

This cleaning liquid is supplied by hot water supplied from a hot water supply pipe 8 through a rinsing liquid tank 4, and then through an excited electromagnetic switching valve 7 to the suction port of a pump 6, and by energizing the pump 6, each The first liquid supply and storage are accomplished by sending the liquid from the liquid jet nozzles 5, 5 into the cleaning chamber 2.

When this storage is completed, the electromagnetic switching valve 7 is demagnetized to control the switching so that the first inflow port 7A and the outflow port 7C communicate with each other, and the second inflow port 7B is closed. The pump 6 is energized while storing hot water up to the level set by the water level detector 13.

Thus, cleaning liquid tank 3 → electromagnetic switching valve 7 → piping P ₃ → pump 6 → piping P ₁ → each spray nozzle 5...
A cleaning operation is performed according to a cleaning cycle in which the cleaning liquid is circulated in the order of → cleaning chamber 2 → cleaning liquid tank 3.

In this case, the liquid after cleaning is collected in the cleaning liquid tank 3, food residue and the like are removed by strainers 14 and 15, and the filtered liquid reaches the pump 6.

In addition, the horizontal spray nozzle in the middle of the liquid spray nozzles 5 sprays the liquid forcefully against the water receiving part provided on the side frame of the rack L, so the rack L rotates due to this water pressure action and sprays the cleaning liquid evenly. The water can be sprayed uniformly onto the tableware C.

When the cleaning cycle for a predetermined time is completed, the electromagnetic switching valve 7 is energized by a timer or the like to control switching so that the second inflow port 7B and the outflow port 7C communicate with each other.

In this way, the washing cycle switches to the rinsing cycle, and the high-temperature rinsing liquid in the rinsing liquid tank 4 is jetted out from the jet nozzles 5, 5, . The cleaning liquid corresponding to the recovered amount is collected in the overflow pipe 12.
is discharged from.

When the entire amount of rinsing liquid in the rinsing liquid tank 4 is sent out, the timer is activated to stop the pump 6 and the rinsing operation is completed, thereby completing one dishwashing operation consisting of a washing cycle and a rinsing cycle. do.

After taking out the tableware C, when draining all the liquid in the cleaning liquid tank 3, it is sufficient to open the drain port 10 into the cleaning liquid tank 3 by pulling up the overflow pipe 12, and the drain port 10, the liquid is quickly drained.

By the way, when both strainers 14 and 15 are removed after liquid discharge, the electromagnetic switching valve 7 opens the first inflow port 7.
From A, the boot 7E consisting of an internal bellows can be visually seen from inside the cleaning liquid tank 3, and this boot 7
Since the entire E and the valve connected to the boot 7E are open to the atmosphere, the degree of contamination can be seen at a glance, and it is possible to clean it as is by spraying water or using a brush.

In addition, the boot 7E facing the second inflow port 7B
is the part through which the rinsing liquid flows, so it is rarely contaminated and does not require cleaning for a long time. However, if maintenance is required, it can be easily removed from the second inlet port 7B by removing pipe _P2 . can be cleaned.

(Effect of the invention) The present invention has a bellows-type direct-acting electromagnetic switching valve that has a boot 7E integrally connected to the back of the valve and is located in a valve chamber facing the first inflow port 7A and the second inflow port 7B, respectively. Since the inflow port 7A is directly connected to the liquid supply port 3A provided on the side wall of the cleaning liquid tank 3, which has a higher level than the drain port 10, it is possible to avoid the areas where contamination is expected to proceed first, i.e. , the boot 7E facing the first inflow port 7A is
When the cleaning liquid tank 3 is drained, the entire boot 7E is open to the atmosphere and can be easily seen from inside the cleaning liquid tank 3, so the degree of contamination can be easily and reliably determined. Since the boot 7E and the valve are located in the valve chamber, direct cleaning of the boot 7E and the valve can be easily performed from the cleaning liquid tank 3 side, so the electromagnetic switching valve 7 can be kept clean at all times to maintain stable hygiene and functionality. It is possible to measure the amount of contaminated liquid that has been washed away, and also to drain the contaminated liquid from the lower drainage port without causing it to flow back.

Further, since the dirt accumulated at the bottom of the cleaning liquid tank 3 is not sucked into the valve, the cleaning cycle is extended, which is effective in streamlining maintenance and saving labor. In addition, the second inflow port 7
If the boot 7E facing the port B needs to be cleaned, it can be easily cleaned from the second inflow port 7B by removing the pipe _P2 .

[Brief explanation of drawings]

FIG. 1 is a schematic mechanical diagram according to an embodiment of the present invention;
FIG. 2 is an enlarged view of the main part of the cleaning liquid tank in FIG. 1, and FIG. 3 is a plan view taken along the - line in FIG. 2. 2...Cleaning chamber, 3...Cleaning liquid tank, 3A...
Liquid feeding port, 4... Rinse liquid tank, 4A... Liquid feeding port, 5... Liquid nozzle, 6... Pump, 7... Solenoid switching valve, 7A... First inflow port, 7B... Second Inflow port, 7C...outflow port, 7E...boot, 10...drain port.

Claims (1)

[Scope of utility model registration request] A cleaning liquid tank 3 is disposed below the cleaning chamber 2 in communication with a cleaning chamber 2 equipped with a spray nozzle 5, and a rinsing liquid tank 4 is disposed near the cleaning chamber 2.
The outflow port 7C of a 3-port, 2-position electromagnetic switching valve 7 is connected to the suction port of a pump 6 whose discharge port is connected to the jet nozzle 5, and the first inflow port of this electromagnetic switching valve 7 is A dishwasher in which a port 7A is connected to the liquid feeding port 3A of the cleaning liquid tank 3, and a second inflow port 7B is connected to the liquid feeding port 4A of the rinsing liquid tank 4, respectively. The liquid feed port 3A is opened in the side wall at a higher level than the position where the drain port 10 of the tank 3 opens, and the electromagnetic switching valve 7 is integrally connected to the back of the valve by a boot 7E made of a bellows. , and the boots 7E are formed in bellows-type direct-acting electromagnetic valves existing in each valve chamber facing the first inflow port 7A and the second inflow port 7B, respectively,
A dishwasher characterized in that the first inflow port 7A is directly connected to the liquid feeding port 3A of the cleaning liquid tank 3.