JPH0673513B2 - Dishwasher - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher, and more particularly to drainage means for discharging wash water (including rinse water) to the outside of the machine.

[Conventional technology]

Various types of drainage means for dishwashers have been proposed in the past, and one of them has been proposed in Japanese Utility Model Publication No. 60-9465. The drainage means proposed in the publication is a drainage pump provided at the bottom of a box-shaped cleaning tank (tank) installed inside a box-shaped main body, with a concave drainage port, and the drainage port and the lower part of the machine body. Hole that connects the suction port of the drainage pump and the discharge port of the drainage pump and one end of the drainage hose, and the middle part of the drainage hose is provided below the side wall of the cleaning tank (overflow discharge port)
Lift higher to support and lower the other end below the hole, at the same height as the hole in the hole between the highest part of the drain hose and the outer edge. It is connected with the part of.

[Problems to be Solved by the Invention]

In the above-described drainage means, since the middle part of the drainage hose (discharge pipe) is lifted higher than the hole provided under the side wall of the cleaning tank to support it, the drainage hose is not easily installed in the main body. Therefore, when draining water with the drainage pump, the wash water must be pushed up to the middle portion of the discharge pipe located higher than the hole (overflow discharge port) to be drained, resulting in poor drainage efficiency.

The present invention has been made to address the above-described problems, and an object of the present invention is to provide a dishwasher having a good discharge pipe installation property and good drainage efficiency.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the present invention, the cleaning water supplied from the outside of the machine by a water supply device is added to a tank provided in the lower part of the cleaning chamber by a circulation supply device to a cleaning nozzle provided in the cleaning chamber. In a dishwasher that supplies pressure to wash dishes stored in the washing room, the dishwasher is drawn from the bottom of the tank and has a top at an overflow water level in the middle that is a predetermined amount above a specified water level in the tank. And the first discharge pipe led out of the machine at the same top,
A drainage pump is provided at the bottom of the tank or the lower end of the first discharge pipe, the drainage pump is provided in the middle, and the discharge port provided at the upper end is connected to the side of the top of the first discharge pipe to guide the outside of the same top. A second exhaust pipe pointing towards the outlet was provided.

[Action]

In the dish washer according to the present invention, when the water level in the tank becomes equal to or higher than the overflow water level, the wash water reaching the top from the bottom of the tank through the first discharge pipe is naturally discharged to the outside of the machine from the tank over the top. The wash water will not overflow.

Further, in the dishwasher according to the present invention, when the drainage pump operates, the washing water in the tank is blown from the discharge port of the second discharge pipe toward the discharge port at the top of the first discharge pipe and is discharged outside the machine. Quickly discharged.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In the dishwasher according to the present invention shown in FIGS. 1 to 3, the main body 10 includes a front wall 11, both side walls 12 and 13, a rear wall 14 and a bottom wall 15.
And an arcuate shield 16 and a tank 17, an opening A that is opened and closed by a slide door (hereinafter simply referred to as a door) 18 is formed in the upper front part, and an upper wall 19 is formed in the upper rear part. An opening for covering is formed. Further, in the main body 10, washing nozzles 22 and 23 for spraying washing water from above and below are respectively arranged on the dishes 21 stored together with the rack 20 in the washing chamber R1 opened and closed by the door 18, and these Both cleaning nozzles 22 and 23 have
Circulation supply device 24 (supply pump 24a and supply pipes 24b, 24c, 24d provided in a machine room R2 formed between the tank 17 and the bottom wall 15)
The cleaning water in the tank 17 is supplied under pressure. In addition to the circulation supply device 24, a forced drainage device 25 (consisting of a drainage pump 25a and drainage pipes 25b and 25c) is provided in the machine room R2, and various parts / members and controls not shown are provided. A device (a device that operates by the operation switch 26 provided on the front wall 11 to control the operations of the circulation supply device 24, the drainage device 25 and the like in a predetermined cleaning cycle and rinsing cycle) and the like are stored.

The arc-shaped shielding plate 16 is fixed to the both side walls 12 and 13 at both left and right ends slightly below the upper wall 19 of the main body 10 and extends rearward by a predetermined amount, and supports the cleaning nozzle 22. , 13 upper part of rear end, upper part of rear wall 14 and upper wall 19 make space above
R3 is formed and a cleaning chamber R1 is formed below by the side walls 12 and 13 and the like. Space R3 is the door 18 when opened
And a function as an exhaust passage that discharges a part of the air in the cleaning chamber R1 that expands when hot cleaning water is sprayed from the cleaning nozzles 22 and 23 to the outside. Have A part of the expanded air is discharged to the outside through a ventilation hole 19a provided in the upper wall 19, and is formed between the front end of the upper wall 19 and the rear end (upper end in the figure) of the closed door 18. The water vapor (water droplets) accompanying this is prevented from being discharged to the outside by the projections 19b provided on the upper wall 19.

The tank 17 has its peripheral portion at the front wall 11, both side walls 12, 13 and the rear wall.
It is fixed to 14, supports the cleaning nozzle 23, and can store a required amount of cleaning water. Further, the tank 17 is provided with a water supply device 27 for supplying washing water into the tank 17 from outside the machine (a water supply pipe connected to a water heater or water pipe (not shown) and a water supply pipe provided in the pipe). (Including a water supply valve (not shown)) and a drainage device 25
A discharge pipe 28 is provided in parallel with the. The discharge pipe 28 is the first pipe 28 drawn out from the bottom of the tank 17.
a and a second pipe (flexible hose) 28b having a discharge port 28b1 arranged outside the machine, and a predetermined amount from a prescribed water level lo in the tank 17 at an intermediate portion, that is, a connecting portion of both pipes 28a and 28b. A top portion H located at the upper first overflow water level 1 is formed, and a discharge port 25c1 provided at the upper end of the drainage pipe 25c in the drainage device 25 is connected to the side of the inside portion of the top portion H to connect the first pipe. 28a1 Outboard exit 28a1
And the communication pipe 29 is connected and opened. The communication pipe 29 has an upper end connected and opened to the tank 17 at a second overflow water level l2 which is a predetermined amount above the first overflow water level 1, and an opening at the lower end.
On the rising side of the first pipe 28a in 28, the opening is connected to the top H. The tank of the communication pipe 29
The opening direction to 17 and the top portion H may be a lateral direction instead of the vertical direction as shown in the drawing, and can be appropriately changed.

The door 18 integrally has a handle 18a on the outer side of the front end thereof, and is formed in an arc shape like the shielding plate 16, and has a main body.
Left and right sides of the opening A of 10, that is, a pair of guide rails 31 and 32 continuously provided on the front edges of the side walls 12 and 13, respectively.
Are fitted so as to be slidable along the opening on both sides and engageable in a direction substantially orthogonal to the opening. This door 18
Can be opened and closed by vertically moving (rotating) by holding the handle 18a, and at that time, it slides in both guide rails 31, 32 and the upper surface of the arc-shaped shield plate 16. , Does not protrude from the main body 10. The closed position of the door 18 is defined by one end (lower end in the figure) 18b of the door 18 contacting the front end 17a of the tank 17, and at that time, the other end (upper end in the figure) 18c of the door 18 has an arcuate shield. It is designed to overlap with the front end of the plate 16 by a predetermined amount, and the open position is defined by the handle 18a coming into contact with the front end of the upper wall 19, at which time the upper wall 19 is not largely deformed upward. As described above, the engagement protrusions 31a and 32a are formed at the upper ends of the guide rails 31 and 32, respectively. Further, the door 18 can be removed from both the guide rails 31 and 32 by rotating backward with the upper wall 19 removed, and can be removed from the main body 10 by further raising it. There is.

The upper wall 19 has side walls 12 and 13 and a rear wall 14 excluding its front edge.
Side wall with three screws 33 in a state of being joined to the upper edge of
12, 13 and the rear wall 14 are detachably attached, and as described above, function as a storage space for storing the door 18 when opened and exhaust for discharging a part of the air in the cleaning chamber R1 to the outside. The function of forming the space R3 that functions as a passage and the door
It has a function as a stopper that defines the open position of 18.

Each of the guide rails 31, 32 is formed in a U-shaped cross section as shown in detail in FIG. 4 by taking the guide rail 31 side as an example, and a labyrinth is formed by the left and right sides of the door 18. A water guiding path P communicating with the tank 17 of the main body 10 is formed at the lower end. A tray 34 is formed at the lower end of the opening A in the main body 10, that is, at the upper end of the front wall 11. The saucer 34 is continuously provided to both left and right ends, and water leaking from the fitting portion between the guide rails 31 and 32 and the door 18 and flowing down on the surface of the door 18 and the door 18 and the cover 19 are provided.
The water vapor discharged from the gap is formed as water droplets on the surface of the door 18 and the water flowing down is received, and these water flows into the tank 17.

In the present embodiment configured as described above, the tableware 21 is placed in the rack 20 and stored in the cleaning chamber R1, and the tank is also stored.
A predetermined amount of washing water is supplied to the inside of 17 together with the detergent so that the water level is approximately the specified water level lo (this water supply may be performed by manually supplying hot water from the opening A, and a water supply switch not shown is operated. The water supply valve of the water supply device 27 may be opened), and when the operation switch 26 is operated to start the cleaning cycle, the cleaning water in the tank 17 is pumped by the circulation supply device 24.
The dishes 21 are washed by being pressurized and supplied by the 24a for a set time and sprayed from the washing nozzles 22 and 23 to the dishes 21. After the lapse of the set time, the pump 24a of the circulation supply device 24 is stopped and at the same time the pump 25a of the drainage device 25 is operated for a predetermined time, so that the tank 1
The washing water inside 7 passes through both drain pipes 25b and 25c.
The first pipe 28a in the discharge pipe 28 from the discharge port 25c1 of c
Is ejected to the outside of the machine through the second pipe 28b through the discharge port 28b1. Further, after the discharge is completed, the pump 25a of the drainage device 25 is stopped,
The water supply valve of the water supply device 27 opens and flush water is supplied from the outside of the machine to the tank 17.
Pump 24 of the circulation supply device 24 that is continuously supplied into the
a is activated and the rinse cycle is run for the set time.
After the elapse of the set time, the pump 24a of the circulation supply device 24 is stopped, and at the same time, the pump 25a of the drainage device 25 is operated for a predetermined time, and the wash water in the tank 17 is discharged out of the machine in the same manner as described above.

In the present embodiment, however, since the lower end of the communication pipe 29 is opened to the top H at the rising side of the first pipe 28a of the discharge pipe 28, the washing water inside the communication pipe 29 is washed at the specified water level lo. Even if the water flows in, the wash water flows down to the rising portion of the discharge pipe 28 (a part of the first pipe 28a) and substantially returns to the inside of the tank 17, so that a shortage of wash water may occur even during long-time washing. There is no.

Further, in the present embodiment, since the wash water is continuously supplied from the water supply device 27 in the rinse cycle, the water level in the tank 17 is the first overflow water level 1 or more (however, the second overflow water level l2 Less than)) from the bottom of the tank 17 to the first pipe 28a of the discharge pipe 28
The wash water reaching the top portion H through the top portion H passes through the top portion H and is discharged to the outside of the machine from the discharge port 28b1 of the second pipe 28b in the discharge pipe 28. At this time, since the air in the top portion H of the discharge pipe 28 is discharged into the tank 17 through the communication pipe 29, the wash water that exceeds the top portion H of the discharge pipe 28 is not blocked by the air. If the amount of water discharged from the discharge pipe 28 and the amount of water supplied from the water supply device 27 are the same, the water level does not change, but if the amount of water supplied is greater than the amount of discharged water, the water level gradually rises and reaches the second overflow water level l2. During this time, the top H is washed by the wash water flowing through the discharge pipe 28.
Since the inside has a negative pressure, air is taken in through the communication pipe 29 and aerated water is discharged to the outside of the machine through the discharge pipe 28.

When the water level in the tank 17 becomes equal to or higher than the second overflow water level l2, the wash water also flows into the communication pipe 29, and the wash water in the tank 17 is discharged by the natural drainage or the drainage due to the siphon action. It is quickly discharged out of the machine through 29. When the water level in the tank 17 becomes less than the second overflow water level l2 due to the discharge action, air comes into the communication pipe 29, the siphon action disappears, and the subsequent overflow drainage flows to the discharge pipe 28. Only natural drainage is used.

In the above embodiment, the drainage pipe 25b in the forced drainage device 25 is led out from the bottom of the tank 17,
As shown in FIG. 5, connect the drain pipe 25b to the drain pipe 2
It is also possible to implement it so that it is led out from the lower end portion of the first pipe 28a in 8.

Further, in the above embodiment, the discharge port 25c1 of the drainage pipe 25c in the forced drainage device 25 and the outboard discharge port 28a1 of the first pipe 28a in the discharge pipe 28 are arranged at the same level. As shown, drain pipe 25
It is also possible to carry out by arranging the discharge port 25c1 of c lower than the outlet port 28a1 of the first pipe 28a outside the machine. In this case,
The rising portion of the drainage pipe 25c in the forced drainage device 25 can be reduced, and space can be saved.

〔The invention's effect〕

In summary, in the present invention, in the present invention, the prescribed water level (lo) in the tank is led out from the bottom of the tank (17)
From the first discharge pipe (28a) which has a top (H) at the overflow water level (1) above a certain amount and is led out of the machine at the same top, and the bottom of the tank or the lower end of the first discharge pipe. A drainage pump (25a) is provided in the middle part, and the discharge port (25c1) provided at the upper end is connected to the side of the top of the first discharge pipe and directed toward the outboard discharge port (28a1) at the top. The drainage means is constituted by the second discharge pipes (25b, 25c), and the drainage means is the overflow water level (1).
Since there is no part that rises higher, both drain pipes can be placed at the same level as the tank, which makes it easier to install both drain pipes, and of course the flush water overflow level The drainage efficiency can be improved without the need to push it to the higher position, and the drainage time can be shortened or the drainage pump can be downsized.

Further, in the present invention, the first drainage pipe (28a) is led out from the bottom portion of the tank, has a top portion at the overflow water level which is a predetermined amount above the prescribed water level in the tank in the middle portion, and is led out of the machine at the top portion. With this configuration, when the water level in the tank becomes equal to or higher than the overflow water level, the cleaning water with a large amount of dirt in the lower layer of the tank does not require the drainage pump to drive the first drainage with a small flow path resistance without driving the drainage pump. Natural drainage is done smoothly through the pipe. Therefore, it is possible to smoothly and accurately carry out the washing by rinsing by continuously supplying the washing water.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the dishwasher according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a perspective view thereof, and FIG. 4 shows a fitting portion between a guide rail and a door. Enlarged sectional view, fifth
The figure is a partial cross-sectional view showing a modified example of the forced drainage device, and FIG. 6 is a partially enlarged cross-sectional view showing a modified example of the connection portion of the drainage pipe and the first pipe of the discharge pipe in the forced drainage device. Explanation of code 17 …… Tank, 21 …… Tableware, 22,23 …… Cleaning nozzle, 24
...... Circulation supply device, 25 …… Forced drainage device, 25a …… Drainage pump, 25b, 25c …… Drainage pipe (second discharge pipe), 2
5c1 …… Discharge port, 27 …… Water supply device, 28 …… Discharge pipe, 2
8a ...... first pipe (first discharge pipe), 28a1 ... outside of the machine, H ... top, R1 ... washing room, lo ... specified water level,
1 ... (First) overflow water level.

Claims (1)

[Claims] 1. A cleaning water supplied from a water supply device from outside the machine into a tank provided at the lower part of the cleaning chamber is pressurized and supplied by a circulation supply device to a cleaning nozzle provided in the cleaning chamber and stored in the cleaning chamber. In a dishwasher that is designed to wash the tableware, it has a top at an overflow water level that is led out from the bottom of the tank and a certain amount above the specified water level in the tank in the middle, and is led out of the machine at the same top. First done
A discharge pipe and a bottom of the tank or a lower end of the first discharge pipe, a drainage pump provided in an intermediate portion, and a discharge port provided at an upper end of the discharge pipe are connected to a top side of the first discharge pipe to connect the same to the top. A dishwasher characterized in that a second discharge pipe is provided which is directed to the outlet of the machine.