JPH0337025A - Dish washer - Google Patents

Abstract

PURPOSE:To allow washing for a long period and improve a washing effect by overflowing the excessive washing water in a tank via a discharge pipe arranged outside the tank and a communicating pipe, and returning the washing water flowing into the communicating pipe to the tank via the discharge pipe at the time of washing at the specified water level. CONSTITUTION:The washing water fed by a water feed device 17 from the outside of a machine into a tank 17 provided below a washing chamber R1 is fed by pressure by a circulating/feeding device 24 to washing nozzles 22 and 23 provided on the washing chamber R1 to wash stored dishes 21. A drain pipe 28 is guided from the bottom section of the tank 17, its top section H is located on its middle section at the first overflow water level 1 above the specified water level 1 of the tank 17, and a discharge port 28b is arranged outside the machine. One end of a communicating pipe 29 is opened to the tank 17 at the second overflow water level l2 above the first overflow water level l1, and another end is opened at the top section of the drain pipe 28. Now, the another end of the communicating pipe 29 is opened at the top section H of the rising side of the drain pipe 28.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dishwasher, and particularly to an overflow means for discharging excess washing water to the outside of the machine.

[Conventional technology]

Various overflow means for dishwashers have been proposed in the past, one of which is disclosed in Japanese Patent Application Laid-Open No. 58-10573.
This is proposed in Publication No. 5. The overflow means proposed in the same publication is to bend the open end of an overflow pipe installed at the bottom of the tank (cleaning tank) into an inverted U shape so as to be close to the bottom of the tank, and to attach a small It has holes.

[Problem to be solved by the invention]

In the above-mentioned Oniverflow method, the dirty cleaning water at the bottom of the tank (if the cleaning water is high temperature, the low temperature cleaning water with lots of dirt) can be discharged as an overflow. In some cases, the overflow pipe rises from the bottom of the tank, which can be a hindrance when cleaning the tank. There is a risk of clogging due to leftover food, and if this happens, a siphon effect will occur and the washing water will be abnormally discharged. ■ If the small holes are made larger, the washing water will return to the tank from above during normal washing. Some of the water is sequentially discharged from the small holes and is reduced, which may cause a shortage of washing water during long-term washing.

The present invention has been made to address the above-mentioned problems, and provides tableware that does not have any protruding parts into the tank, does not have its function impaired by leftover food, and does not run out of washing water even when washed for a long time. The purpose is to provide cleaning machines.

[Means to solve the problem]

In order to achieve the above object, in the present invention, cleaning water is supplied from outside the machine by a water supply device into a tank provided at the lower part of the cleaning chamber, and is added to a cleaning nozzle provided in the cleaning chamber by a circulating supply device. In a dishwasher configured to wash dishes stored in the washing chamber by supplying pressure, the water is drawn out from the bottom of the tank and has a top at a first overflow water level above the specified water level in the tank in the middle part. and a discharge pipe having a discharge port disposed outside the machine;
A communicating pipe is provided which opens into the tank at one end and opens into the top of the discharge pipe at the other end at a second overflow water level above the overflow water level. It is desirable that the other end of the communication pipe opens at the top on the rising side of the discharge pipe.

[Effect]

In the dishwasher according to the present invention, when the water level in the tank becomes equal to or higher than the first overflow level (however, lower than the second overflow level), the cleaning water (contaminated or contaminated) that reaches the top from the bottom of the tank through the discharge pipe is (contaminated, low-temperature cleaning water) is discharged outside the machine from the outlet of the discharge pipe over the top.At this time, the air in the top of the discharge pipe is discharged into the tank through the communication pipe, so the discharge pipe Wash water that exceeds the top of the tank is not blocked by the air.

Additionally, when the water level in the tank reaches or exceeds the second overflow water level, cleaning water also flows into the communicating pipe, and the cleaning water in the tank is discharged to the outside of the machine through the piping and the connecting pipe. is quickly excreted. When the water level in the tank falls below the second overflow level due to this discharge action, air will flow into the communication pipe, and the siphon action will disappear and subsequent overflow drainage will be natural drainage through the discharge pipe. Only.

In addition, in the dishwasher according to the present invention, if the other end of the communication pipe is opened at the top on the rising side of the discharge pipe, even if washing water flows into the communication pipe during washing at a specified water level. Since the cleaning water flows down to the rising part of the discharge pipe and essentially returns into the tank, there is no shortage of cleaning water even during long-term cleaning.

〔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, a main body 10 includes a front wall 111, side walls 12, 13, . back wall 1
4 and a bottom wall 15, an arc-shaped shielding plate 16 and a tank 17, and an opening A that is opened and closed by a sliding door (hereinafter simply referred to as a door) 18 at the front upper part.
is formed, and an opening covered by an upper wall 19 is formed at the rear upper part. In addition, in the main body lo, there is a rank 20 cleaning chamber R1 that is opened and closed by the door 18.
Washing nozzles 22 and 23 for spraying washing water from above and below onto the tableware 21 stored therein are respectively provided, and these rewashing nozzles 22 and 23 are formed between the tank 17 and the bottom wall 15. A circulation supply device 24 (a supply pump 24a and supply pipes 24b, 24
(c and 24d), the wash water in the tank 17 is supplied under pressure. In addition, in the machine room R2, in addition to the circulation supply device 24, there is a forced drainage device 25 (consisting of a drainage pump 25a and drainage pipes 25b and 25C).
In addition, various parts/members and control devices (not shown) (operated by an operation switch 26 provided on the front wall 11, a circulation supply device 24, a drainage device 25, etc. are provided in a predetermined washing cycle and rinse cycle). It houses devices that control operations.

The arc-shaped shielding plate 16 is slightly below the upper wall 19 of the main body 10 and has both right and left ends fixed to the side walls 12.13, and extends rearward by a predetermined distance, supporting the cleaning nozzle 22, and supporting the cleaning nozzle 22. Upper rear end of .13.

A space R3 is formed upwardly by the upper part of the rear wall 14 and the upper wall 19.
, and a cleaning chamber R1 is formed below by side walls 12, 13, etc. The space R3 functions as a storage space for storing the door 18 when opened, and also directs a portion of the air in the cleaning chamber R1, which expands when high-temperature cleaning water is jetted from the cleaning nozzles 22 and 23, to the outside. It has the function of an exhaust passage for discharging air. Note that a part of the expanded air flows through the ventilation hole 19 provided in the upper wall 19.
a, and is also discharged to the outside through a gap formed between the tip of the earthen wall 19 and the rear end (upper end in the figure) of the door 18 in the closed state. Water vapor (water droplets) is removed by the protrusion 1 provided on the upper wall 19.
9b prevents it from being discharged to the outside.

The tank 17 has its peripheral edge connected to the front wall 119 and both side walls 12.1.
3 and the rear wall 14, supports the cleaning nozzle 23, and can accommodate the required amount of cleaning water.

In addition, the tank 17 includes a water supply device 27 (a water supply pipe with a symbol connected to a water heater or water supply (not shown) and a water supply pipe interposed in this pipe) for supplying washing water into the tank 17 from outside the machine. A water supply valve (not shown) is provided, and a discharge pipe 28 is provided in parallel to the drainage device 25.
is provided. The discharge pipe 28 consists of a first pipe 28a led out from the bottom of the tank 17 and a second pipe 28b having a discharge port 28b1 disposed outside the machine.
A top portion H located at the first overflow water level 11 above the specified water level io in the tank 17 is formed at the intermediate portion, that is, the connection portion between the two vibrators 28a and 28b. Drainage vibe 25
c is connected and opened, and the communication vibe 29 is connected and opened. The communication bar and eve 29 are connected to a second overflow water level 1 above the first overflow water level 11.
The upper end is connected to the tank 17 at 2 and opened, and the lower end is connected to the top H of the discharge pipe 28 on the rising side of the first pipe 28a and opened. Note that the opening direction of the communication vibrator 29 to the tank 17 and the top H may not be the vertical direction as shown in the figure, but may be the horizontal direction, and can be changed as appropriate.

The door 18 has a handle 18a integrally on the outside of its front end, is formed in an arc shape like the shielding plate 16, and is attached to both left and right sides of the opening A of the main body 10, that is, both side walls 12.
．． The guide rails 31 and 32 are fitted on both sides of the guide rails 31 and 32, respectively, which are continuously provided on the front edges of the guide rails 13 so as to be able to slide along the opening and to be securely engaged in a direction substantially perpendicular to the opening. This door 18 can be opened and closed by holding the handle 18a and moving it up and down (rotating).
6 and does not protrude from the main body 10. Note that the closed position of door 18 is door 1.
-@ (lower end in the figure) 18b of 8 is the front end 17 of the tank 17
In this case, the other end (upper end in the drawing) 18C of the door 18 is in contact with the arcuate shielding plate 16.
Front end and predetermined! The opening position is defined by the handle tSa coming into contact with the front end of the upper wall 19, and both guide rails 31 and 32 are arranged so that the upper wall 19 does not deform significantly upward at that time. Engagement protrusions 31a and 32a are formed at the upper ends of. Further, the door 18 can be removed from both guide rails 31 and 32 by rotating rearward with the top wall 19 removed, and can be removed from the main body 10 by lifting it upward. There is.

The upper wall 19 can be attached to and detached from the side walls 12, 13 and the rear wall 14 using three screws 33, with its peripheral edges excluding its front edge joined to the upper edges of the side walls 12, 13 and the rear wall 14. The space R3 is attached and, as described above, functions as a storage space for storing the door 18 when opened and as an exhaust passage for discharging a part of the air in the cleaning chamber R1 to the outside.
It has a function of forming a door 18 and a function of a strike bar that defines the opening position of the door 18.

Each of the guide rails 31 and 32 is formed in a U-shape in cross section, as shown in detail in FIG. Tank 1 of main body 10 at the lower end
A water guide path P communicating with 7 is formed. Further, a saucer 34 is formed at the lower end of the main body 10 toward the opening, that is, at the upper end of the front wall 11. The saucer 34 is provided continuously to both the left and right ends, and is connected to both guide rails 31°3.
2 and the door 18 and flows down the surface of the door 18, and water vapor discharged from the gap between the door 18 and the cover 19 becomes water droplets on the surface of the door 18 and flows down. However, the receiver can be stopped, and the water can flow into the tank 17.

In this embodiment configured as described above, the cleaning chamber R1
In addition to storing tableware 21 in the container 20, washing water and detergent are stored in the tank 17 at an approximate water level of io.
This water supply may be performed by manually supplying hot water from the opening A, or by operating a water supply switch (not shown) and opening the water supply valve of the water supply device 27. When the cleaning cycle is started by operating the operation switch 26, the cleaning water in the tank 17 is supplied under pressure by the pump 24a of the circulation supply device 24 for a set time and is sprayed onto the tableware 21 from the re-rinsing nozzle 22.23. Tableware 21 is washed. After the set time has elapsed, the pump 24a of the chain supply device 24 stops and at the same time the drain device 25
The pump 25a operates for a predetermined period of time, and the cleaning water in the tank 17 is discharged to the outside of the machine. Furthermore, after the discharge is completed, the pump 25a of the drainage device 25 is stopped, and the water supply device 2
The water supply valve 7 is opened and cleaning water is continuously supplied into the tank 17 from outside the machine, and the pump 24a of the circulation supply device 24 is opened.
is activated and a rinse cycle is run for the set time. After the set time has elapsed, 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 activated for a predetermined period of time to discharge the wash water in the tank 17 to the outside of the machine.

In this embodiment, since the lower end of the communication pipe 29 is opened to the top H on the rising side of the first vibrator 28a in the discharge pipe 28, cleaning water flows into the communication pipe 29 during cleaning at the specified water level io. Even if there is an influx of
The cleaning water flows down to the rising portion of the discharge pipe 28 (a part of the first pipe 28a) and substantially returns into the tank 17, so there is no shortage of cleaning water even during long-term cleaning.

In addition, in this embodiment, since washing water is continuously supplied from the water supply device 27 in the rinse cycle, the water level in the tank 17 is equal to or higher than the first overflow water level A1 (however, the water level in the tank 17 is higher than the first overflow water level A1). less than)
, the first part of the discharge pipe 28 is connected from the bottom of the tank 17.
The cleaning water that has reached the top H through the vibrator 28a passes over the top H and is discharged from the discharge port 28b1 of the second pipe 28b in the discharge pipe 28 to the outside of the machine. At this time, since the air in the top II of the discharge pipe 28 is discharged into the tank 17 through the communication barb 29, the cleaning water that exceeds the top 11 of the discharge pipe 28 is not obstructed 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 water discharged, the water level gradually rises and reaches the second overflow water level 12. During this time,
Since the cleaning water flowing through the discharge pipe 28 creates a negative pressure inside the top work I, air is sucked through the communication vibrator 29 and the aerated water is discharged to the outside of the machine through the discharge pipe 28.

Also, the water level in the tank 17 is the second overflow water level 1.
2 or more, the cleaning water also flows into the communication pipe 29 and the cleaning water in the tank 17 is drained by natural drainage or drainage due to the siphon action and is discharged to the vibration pipe 28 and the communication pipe 29.
is quickly ejected out of the aircraft through the When the water level in the tank 1 becomes lower than the second overflow water level 12 due to this discharge action, air will flow into the communication pipe 29, and the siphon action will disappear and the overflow will be drained from the discharge pipe 28. Only natural drainage is allowed through the water.

In the above embodiment, the present invention was implemented in a dishwasher equipped with a forced drainage device 25, but the present invention is applicable to a dishwasher without a forced drainage device (wash water used in the rinse cycle is used in the next wash cycle). It can be implemented in the same way or with appropriate modifications for a dishwasher used as washing water.

〔Effect of the invention〕

In summary, in the present invention, surplus cleaning water in the tank can be overflow discharged using the discharge pipe (28) and the communication pipe (29) disposed outside the tank (17), so that no obstructions protruding into the tank There are no things,
The inside of the tank can be cleaned easily. In addition, since the leftover food and the like are discharged to the outside of the machine through both pipes (28, 29) together with the washing water, the functions of both the vibrators are not impaired by the leftover food and the like, and a stable operation can always be obtained.

Furthermore, when washing at a specified water level, the washing water that flows into the communication pipe is returned to the tank through the discharge pipe, so there is no shortage of washing water even when washing for a long time.
It is possible to wash for a long time and improve the cleaning effect.

[Brief explanation of drawings]

Fig. 1 is a longitudinal 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. It is an enlarged sectional view. Explanation of symbols 17...tank, 21...tableware, 22.23...
Washing nozzle, 24... Circulation supply device, 27... Water supply device, 28... Discharge pipe, 28bl... Discharge port, H... Top, 29... Communication pipe, R1 ...
Washing room, io... specified water level, 11... first overflow water level, 12/second overflow water level.

Claims (2)

[Claims] (1) Washing water supplied from outside the machine by a water supply device into a tank provided at the bottom of the washing chamber is pressurized and supplied to a washing nozzle provided in the washing chamber by a circulating supply device, and tableware is stored in the washing chamber. In a dishwasher designed to wash
a discharge pipe led out from the bottom of the tank, having a top at a first overflow water level above the specified water level in the tank at an intermediate portion, and having a discharge port disposed outside the machine;
A dishwasher characterized in that a communication pipe is provided that opens into the tank at one end and opens at the top of the discharge pipe at the other end at a second overflow water level above the first overflow water level. (2) Claim 1 characterized in that the other end of the communication pipe is opened at the top on the rising side of the discharge pipe.
Dishwasher as listed.