JPH02185221A - Dish washer - Google Patents

Abstract

PURPOSE:To easily execute the simplification of a water leak preventing structure and the reduction of a manufacturing cost by maintaining a drain pipe between a drain valve and a check valve body at a negative pressure with the suction input of a feeding pump at the time of feeding water from the feed pump to a fountain blade. CONSTITUTION:In a dish washer provided with a fountain blade 23, a normal rotation discharge port 26 of a feeding pump 25 capable of normal rotation and reverse rotation is communicated with a fountain blade 23, and a reverse rotation discharge port 27 is communicated through a drain valve 39 with a drain pipe 28. A check valve body 30 is provided on the drain pipe 28, and the drain pipe 28 between the drain valve 39 and check valve body 30 is communicated with the water sucking side of the feeding pump 25. Then, at the time of feeding the water from the feeding pump 25 to the fountain blade 23, the suction force of the feeding pump 25 works to the drain pimp 28 between the drain valve 39 and check valve body 30, and the negative pressure is maintained. Consequently, the drain valve 39 and check valve body 30 are pressurized in a closing movement direction, the water leak can be prevented, simultaneously, a feeding loss can be easily reduced by returning the water from the drain pipe 28 to the feeding pump 25 even when the water leaks, and the simplification of the water leak preventing structure, the reduction of manufacturing cost, etc., can be easily contrived.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a dishwasher that sprays warm water mixed with detergent onto dishes to wash them to remove stains, and also dries them with warm air after rinsing.

``Conventional technology'' Conventionally, there was a technology in which a fountain blade was rotatably installed at the bottom of the washing chamber where dishes were placed, a water storage tank was formed at the bottom of the washing chamber, and the water in the tank was blown up from the fountain blade to wash the dishes. .

"Problems to be Solved by the Invention" The above-mentioned conventional technology has a simple structure and can easily reduce costs by using the pump that drains the cleaning chamber in which the fountain blades are arranged as the pump that supplies water to the fountain blades. However, the structure that prevents water from leaking from the drainage side when water is being supplied to the fountain blades is complicated and expensive, making it difficult to simplify the leakage prevention structure and reduce manufacturing costs. was there.

``Means for Solving the Problems'' However, the present invention provides a dishwasher in which a fountain blade is installed inside a washing chamber in which dishes are placed, in which a normal rotation discharge port of a reversible water pump is communicated with the fountain blade. Further, a drain pipe is communicated with the reverse discharge port of the water pump through a drain valve, and a check valve body is provided in the drain pipe, and the water suction of the water pump as a drain pipe is provided between the drain valve and the reverse valve body. It is characterized by being connected to the side.

"Effect J" Therefore, when water is being supplied from the water pump to the fountain blades,
Since the suction force of the water pump acts on the drain pipe between the drain valve and the check valve body and maintains a negative pressure, the drain valve and the check valve body are pressurized in the closing direction to prevent water leakage. In addition, even if water leaks, the loss of water can be easily reduced by returning to the water pump from the drain pipe, and the leakage prevention structure can be simplified and the manufacturing cost can be reduced compared to the conventional system.

"Example" Hereinafter, an example of the present invention will be described in detail based on the drawings. 1st
The figure is a cross-sectional side view, showing a main body case (2) made of synthetic resin that forms the cleaning tank (1), and side covers (3) that are connected and fixed to the rear side and both left and right sides of the main case (2). , a lid cover (5) which is an upper lid forming a door with a single plate-shaped body having lattice-shaped protrusions (4) on the inner surface of the upper surface, and a lid cover (5) on the upper surface and the front surface. by extending the washing tank (1
) and the covers (3) and (5) form a square box-shaped cleaning chamber (6), and the lid cover (5) can be opened and closed freely around the support shaft (7) on the rear edge of the top surface, allowing cleaning. A shelf-shaped body (
9) be installed so that they can be accessed and removed freely.

In addition, a water supply port (lO) is opened at the bottom of the cleaning tank (1),
A water supply valve (I2) having a water supply solenoid (II) is provided at the water supply port (10), and a water supply hose (13) connected to the water supply is connected to the water supply port (10) via the valve holder 2).
lO) is connected, and the valve (12) is opened and closed to supply an appropriate amount of water into the cleaning tank (1).

In addition, a cleaning tank (water storage tank r14 at the bottom of 11) is formed, a water intake case (15) is fixedly installed at the bottom of the tank (14), and the tank (14) and water intake case (15) are covered with a grid plate for preventing swirling. (Step 6), and the tank (
14) is equipped with a heater (17), and a spring (1
Attach the drawer stand (19) to be removed by step 8), place the removable dust case (20) on the drawer stand (19), and attach the dust case (20) to the upper surface of the tank (14) so that it can be taken out and put in freely. It is configured to collect dust by

In addition, a hollow water guide shaft (21) is installed approximately at the bottom of the cleaning tank (1).
), a fountain blade (23) having a plurality of injection nozzles (22)... is rotatably attached to the upper end of the water guiding shaft (21), and a water pump (25) has a built-in water blade (24). is installed on the lower surface side of the bottom of the cleaning tank [1], the forward rotation discharge port (26) of the pump (25) is connected in communication with the lower end of the water guiding shaft (21), and the reverse rotation discharge port (27) of the pump (25) is connected to the lower end of the water guide shaft (21). ) to the drain pipe (28), and connect the reverse valve body (30) to the drain hose (29) that communicates with the sewer.
and one in which the drainage pipe (28) is connected via a secondary side drainage pipe (31), and a water suction pipe (32) communicated with the water intake case (15) is connected to the water suction side of the water pump (25). The forward rotation of the water pump (25) sends the water in the tank (14) from the normal rotation discharge port (26) into the cleaning chamber (6), while the reverse rotation of the water pump (25) causes the water in the tank (14) to flow out of the tank (14). Water reversing outlet (27)
It is configured so that it is discharged from the water to the sewer.

In addition, a control box (
33), and a start switch (34), stop switch (35), door open switch (36), etc. are installed.

Furthermore, as is clear from Figure 2, a drainage pipe (28
) is provided with a check valve (38) on the reverse valve body (30) that closes the outlet side of the water supply blade (
A drain valve (39) is provided at the reverse discharge outlet (27) which closes when the pipe (24) is rotated in the normal direction and opens when the pipe rotates in the reverse direction. ) (32) is connected by a return flow pipe (40) having a smaller diameter than
), and a drain pipe (28) is connected to the reverse discharge port (27) of the water pump (25) via a drain valve (39).
), a check valve body (30) is provided in the drain pipe (28), and the drain pipe (28) between the drain valve (39) and the check valve body (30) is connected to a water supply pump (
25) is connected to the water absorption side.

Furthermore, as is clear from FIG. 3, the dust case (2
A plurality of water leakage holes (41)... are opened in the pan holder part of 0), and the dust case (20) is inserted into the notch (42) of the dust case (20) against the spring (18). a lock arm (43) that supports the device in the mounting position; and the notch (42).
A dust removal mechanism (45) having a dust removal solenoid (44) for escaping the lock arm (43) from the water pump (25) is provided.
), a dust case (20) for receiving washed-off dust is installed in and out of the washing chamber (6), and the dust case (20) is cleaned after the washing operation and before the rinsing operation is finished. The chamber (6) is configured to be automatically moved outward.

Further, a magnet (46) is embedded and fixed in the dust case (20), and the lock arm (43) is attached to the notch (4).
A sensor (47) such as a reed switch operated by a magnet (46) is fixedly supported on the main body case (2) when the sensor (471 & the dust case (20) is inserted into the dust case (20). ) When detecting the attachment, the water supply valve (12) is activated based on the detection result of this sensor (47).
and a sensor (47) configured to operate the water supply pump (25) and perform the water supply cleaning operation only when the dust case (20) is installed inside the cleaning chamber (6).
The sensor (47) is attached to the main body case (2) side away from the cleaning tank (1).

The part (49) is rotatably fitted and supported, and the boss part (49) is rotatably fitted and supported.
A thin ring groove (
50), and a removable spray nozzle (22) is located approximately at the center of the fountain blade (23) facing the boss portion (49).
), and when removing the fountain blades (23),
) to form an opening, or a central nozzle (2
2) to form an opening, insert a jig through the opening, and remove the hook (48).
) A fountain blade (23) that communicates with the discharge port (26) is rotatably attached by a hook (48) serving as an engagement means.

Furthermore, as is clear from FIGS. 4 and 5, a cleaning motor (51) rotates the water pump (25) in forward and reverse directions.
and a wing portion (24a) which is integrally adhesively fixed.
] and a disc part (24bl).
A shaft hole (53) is formed in the shaft portion (52), and a protruding ring (54) for preventing removal and a key (55) are provided inside the shaft hole (53).

Further, the motor (51) is provided with a rotating shaft (56) that is inserted into the shaft hole (53), and the key (55) is engaged with the ring groove (57) into which the protruding ring (54) is inserted. keyway (
58) is formed on the rotating shaft (56), and the shaft portion (
52) A spring (59) is elastically wound around the outer periphery, and the shaft part (
52) Wrap a spring (59) around the outer circumference, elastically fix the shaft (52) of the water supply blade (24) to the rotation shaft (56) to be inserted, and attach the water supply blade (24) to the rotation shaft (56). Provide fixed support.

Furthermore, the water pump (25) is operated to direct pressure air from the fountain blade (23) into the washing chamber (6) to dry the dishes.

Furthermore, as is clear from FIG. 6, there is also a lock body (67) that slides in and out of the notch (66) of the lid cover (5) through the bottle (64) and the elongated hole (65), and the output gear. (68a) and an auto-lock motor (68) that reciprocates the lock body (67) via the rack gear <68bl
and an advance/exit switch f69) (701) for controlling the motor (68) in forward and reverse directions, and an interlock mechanism (71) is provided, and the lock body (67) is connected to the notch (66).
The lock body (6) is a locking means for regulating the opening operation of the lid cover (5), which is a door for loading and unloading tableware.
7), and is configured to release the lock body (67) by operating the door open switch (36) or turning off the power.

Furthermore, as is clear from FIG. 7, a cleaning circuit (72) configured with a microcomputer is provided, and each of the switches (34) to (36) (69) +701 and the pan holder sensor (47) are connected to the circuit (72). ), and the respective solenoids (11, 44, and 60) are output connected to the circuit (72). In addition, the solenoid (
The sensor (47) can also be installed at a position to detect the movement of the sensor (44).

In addition, the heater (17) is output connected to the circuit (72) via the AC circuit (73) and the single-wave rectifier circuit (74), and the AC output is used as a power source for the heater (17) located inside the cleaning chamber (6). The washing motor (51) is connected to the forward rotation and reverse rotation circuit (751 (76)), and the cleaning motor (51) is connected to the forward rotation and reverse rotation circuit (77).
The auto-lock motor (68) is output connected to the circuit (72) through the circuit 1 (781), so that the washing, rinsing and drying of dishes can be continuously and automatically performed.

(6), attach the dust case (17) to the specified position of the main body case (2), and press the start switch (34).
The water supply cleaning operation is started by operating the water supply circuit (73
) The water in the tank (14) is heated by a heater (17) which is continuously operated via a heater (17).

Then, by forward rotation of the water pump (25), the tank (
14) is sent to the fountain blade (23), and the water from the injection nozzle (
Water is jetted upwards from the washing chamber (6) from the washing chamber (6), and the jetting force of the water rotates the blades (23), and the jetted water hits the dishes and washes away the dirt.
The water that has splashed up to the ceiling in step 6) falls almost directly below from the surface of the protrusion (4), washing away the dirt on the tableware from the top side as well.

In addition, the sewage that has fallen to the bottom of the cleaning tank (11) is collected from the dust case (2).
0) and returns to the tank (14), where the dust is collected and only water is circulated, washing the dishes for a certain period of time.

Furthermore, when the cleaning time has elapsed, the water pump (25)
is rotated in the reverse direction to discharge the dirty water from the tank (14), the water supply valve (12) is opened to supply new water, and the water supply pump (25) is rotated in the forward direction to perform the first rinsing. When the first rinsing operation is completed after a certain period of time, the dust removal solenoid (44) is activated and the dust case (20) is moved to the outside of the washing water circulation path by the spring (18) as shown in Fig. 3. At the same time, as in the first rinsing operation, the tank (
14) Replace the water to perform a second rinsing operation and a third rinsing operation.

When the rinsing operation is completed, all the water in the tank (14) is drained, the heater (17) is intermittently operated via the half-wave rectifier circuit (74), and the drying solenoid (
60) opens the intake valve (61), runs the water pump (25) idly, and sends high-pressure air into the cleaning chamber (6) through the normal rotation discharge port (26) and the fountain blade (23). , the dishes are dried by air heated by a heater (17).

Furthermore, as shown in the flowchart of FIG. 9, when the stop switch (35) is operated or the power is turned off,
Similar to operating the door open switch (36), the exit switch (
Auto lock motor (68) so that 70) is turned on
The lock body (67) is released from the notch (66) of the lid cover (5), and the start switch (
34) When the above cleaning operation is performed by operation, the auto-lock motor (68) is operated so that the advance switch (69) is turned on, and the notch (66) of the lid cover (5) is turned on.
) to fix and support the lid cover (5) in the closed position, thereby preventing the lid cover (5) from opening during cleaning.

"Effects of the Invention" As is clear from the above embodiments, the present invention provides a water pump (25) that can be reversibly reversible in a dishwasher in which a fountain blade (23) is installed inside the washing chamber (6) in which dishes are placed. The forward rotation discharge port (26) is connected to the fountain blade (23), and the reverse rotation discharge port (27) of the water pump (25) is connected to a drain valve (
A drain pipe (28) is connected through the drain pipe (39), and a reverse valve body (30) is provided on the drain pipe (28), and the drain pipe is connected between the drain valve (39) and the check valve body (30). (28) is connected to the water suction side of the water pump (25), and the water pump (25) is connected to the fountain blade (23).
), the water pump (25) is connected to the drain pipe (28) between the drain valve (39) and the check valve body (30).
Since the suction force of
9) and the reverse valve body (30) are pressurized in the closing direction to prevent water leakage, and even if water leaks, the drain pipe (
By returning from 28) to the water pump (25), it is possible to easily reduce the water supply loss, and it has practical effects such as simplifying the leakage prevention structure and reducing manufacturing costs compared to the conventional method. It is something.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view showing one embodiment of the present invention, Fig. 2 is an explanatory diagram of a water pump, Fig. 3 is an explanatory diagram of a dust case, and Fig. 4 is an explanatory diagram of a dust case.
The figure is an explanatory diagram of the fountain blade and water pump, Figure 5 is an exploded view of the water blade, Figure 6 is an explanatory diagram of the interlock mechanism, Figure 7 is a control circuit diagram, and Figures 8 and 9 are flowcharts. be. 6)... Washing room 23)
... Fountain vane 25) ... Water pump 26) ... Forward rotation discharge port 27) ... Reverse discharge port 28) ... Drain pipe 30) ... Reverse upward valve body

Claims (1)

[Claims] In a dishwasher in which a fountain blade is installed inside the washing chamber in which dishes are placed, a normal discharge port of a reversible water pump is communicated with the fountain blade, and water is drained through a reverse discharge port of the water pump via a drain valve. A dishwasher characterized in that the pipes are connected to each other, a check valve body is provided to the drain pipe, and the drain pipe between the drain valve and the check valve body is connected to a water suction side of a water pump.