JP3799719B2 - Dishwasher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is related to a dishwasher provided with a nozzle for injecting cleaning water.
[0002]
[Prior art]
A conventional dishwasher will be described with reference to FIGS. When washing dishes, the dishes that are the objects to be washed are stored in the dish basket 32 of the washing tub 31, and the detergent is introduced to start the operation. When the operation is started, first, a water supply step of supplying a predetermined amount of cleaning water to the cleaning tank 31 is executed so that the operation of pressurizing the cleaning water by the pump 33 is stabilized. The pump 33 has a centrifugal impeller 34 and an electric motor 35 that drives the centrifugal impeller 34. Subsequently, a main washing process is performed in which the washing water pressurized by the pump 33 and heated by the heater 36 is jetted from the jet port of the nozzle 37 together with the detergent. The washing water is jetted vertically or obliquely upward from the nozzle 37. Further, the nozzle 37 rotates substantially horizontally by this injection reaction force. The tableware is washed by the action of the collision force, detergent, heat, etc. of the washing water sprayed from the nozzle 37 rotating in this way.
[0003]
As shown in FIG. 7, the nozzle 37 has a substantially tubular inlet portion 37 a, and a substantially tubular nozzle bearing 38 is provided to support the rotation of the nozzle 37. When the pump 33 is operated in the cleaning process, the nozzle 37 is almost balanced between the cleaning water pressure and the weight, the end surface of the inlet portion 37a rotates inside the nozzle bearing 38, and the slide that suppresses the leakage of the cleaning water. A moving part 39 is formed. Therefore, the sliding portion 39 is provided with a spacer 39a made of a material having a small frictional resistance, so that the nozzle 37 rotates smoothly.
[0004]
After the main washing process for a predetermined time, the process enters a draining process in which cleaning water containing dirt washed off from tableware and the like is discharged to the outside by a drain pump (not shown). Subsequently, a water supply process for newly supplying cleaning water, a rinsing process for spraying cleaning water from the nozzle 37 in order to rinse the tableware soiled with detergent or leftovers (dirt adhering to tableware is also referred to as leftovers), The draining process is continuously repeated four times to complete the cleaning process.
[0005]
Subsequently, a drying process is performed in which air is sent from the outside by a blower (not shown), and at the same time, the heater 36 is intermittently operated to create warm air, and water droplets adhering to the tableware are evaporated by this warm air. In this drying process, the humid air in the cleaning tank 31 is discharged from the exhaust port 40 to the outside of the apparatus. Reference numeral 41 denotes a control device that controls the operation of the pump 33, the heater 36, and the like.
[0006]
[Problems to be solved by the invention]
The tableware washing machine of the above-mentioned conventional structure has the following subjects about the nozzle which injects washing water.
[0007]
First, in the cleaning process, at the end of each process of the main cleaning process and the rinsing process, cleaning water exists as residual water in the nozzle bearing. Therefore, in the dishwasher having such a configuration, dirt and foreign matters contained in the residual water are likely to remain on the nozzle bearing, so that it is necessary to increase the number of times of rinsing in the new cleaning water and a large amount of cleaning water. It is what. In addition, it was difficult to blow air in that portion, and the cleanliness was lacking in that it did not dry easily.
[0008]
This invention solves the subject which the above conventional dishwashers have. In particular, it is an object of the present invention to provide a dishwasher with a nozzle and a nozzle bearing having a simple structure that reliably discharges cleaning water and dirt inside the nozzle bearing to obtain a predetermined cleaning performance and cleanliness. Is.
[0009]
[Means for Solving the Problems]
Dishwasher of the present invention is to interior and cleaning tank, a nozzle having an injection port for injecting the wash water inlet of the substantially tubular incorporating wash water, the inlet portion of the nozzle for accommodating the object to be cleaned Te and nozzles bearing generally tubular supporting the rotation, a washing pump for pressurizing flush water, comprising a drainage pump to drain the washing water to the outside, the inside of the sliding portion of the nozzle bearing the inlet portion of the nozzle with communicating with the discharge port of the washing pump through the nozzle bearing, and closely disposed drain hole for discharging the washing water present in the gap between the inlet portion of the nozzle to the sliding portion The air is pressurized by the washing pump and sprayed from the nozzle or drain hole .
[0010]
According to this invention, in the cleaning process, cleaning water and fine dirt present in the gap between the nozzle inlet and the nozzle bearing flow out of the nozzle bearing through the drain hole and are discharged out of the machine together with the drainage. Is done. That is, the rinsing effect is enhanced, and a dishwasher can be provided that can obtain a predetermined detergency with less washing water and the number of times of rinsing.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention is a nozzle that rotates substantially horizontally, having a cleaning tank for storing an object to be cleaned, a substantially tubular inlet portion for receiving cleaning water, and an injection port for jetting cleaning water. When, with the nozzle bearing generally tubular having a sliding portion for supporting the rotary and furnished the inlet portion of the nozzle, a washing pump for pressurizing flush water, a drain pump for discharging the washing water to the outside of the apparatus, The inlet portion of the nozzle communicates with the discharge port of the cleaning pump through a sliding portion inside the nozzle bearing, and the nozzle bearing discharges cleaning water present in a gap between the inlet portion of the nozzle. A water drain hole is disposed in the vicinity of the sliding portion, and air is pressurized by the washing pump and ejected from the nozzle or the water drain hole.
[0012]
In this invention, in the cleaning process, cleaning water and fine dirt present in the gap between the nozzle inlet and the nozzle bearing flow out of the nozzle bearing through the drain hole and are discharged out of the machine together with the drainage. . That is, the rinsing effect is enhanced, and a predetermined cleaning performance can be obtained with less cleaning water and the number of times of rinsing. In addition, air can be pressurized and sent from the pump in each drainage process of the cleaning process, so that dirt and residual water can be discharged to the outside of the nozzle bearing more quickly with air. A predetermined cleaning performance can be obtained over time.
[0013]
The invention according to claim 2 of the present invention, in addition to the invention of claim 1, as a sliding portion for supporting the inlet portion of the nozzle, provided with a valve body which moves within the nozzle bearing, the valve body Is configured to move to a position where the drain hole is closed when the washing water is pressurized, and to a position where the drain hole is opened when the washing water is not pressurized .
[0014]
In the present invention, as in the first aspect of the present invention, in the drainage process, the valve body moves to a position where the water drain hole is opened, and the cleaning water and fine dirt present in the gap between the nozzle inlet and the nozzle bearing are removed. Then, it flows out of the nozzle bearing through this drain hole. That is, the rinsing effect is enhanced, and a predetermined cleaning performance can be obtained with less cleaning water and the number of times of rinsing.
[0015]
According to the third aspect of the present invention, in addition to the first or second aspect of the present invention, a heater for heating cleaning water or air is provided, and the heater is disposed to face the drain hole. The water droplets remaining in the vicinity of the drain hole are dried and evaporated to keep the dishwasher clean.
[0016]
The invention of claim 4 wherein the present invention, in addition to the invention of any one of claims 1 to 3, a heater for heating the wash water or air is provided, the cover of the nozzle for covering the upper portion of the heater A dishwasher that is clean and safe is provided integrally with the lower part or separately provided below the rotation trajectory.
[0017]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0018]
Example 1
1 and 2, 1 is a washing tank, 2 is a dish basket for storing objects to be cleaned such as dishes and cooking tools, 3 is a pump for pressurizing washing water, 4 is a centrifugal impeller of a pump 3, and 5 is this An electric motor that drives the centrifugal impeller 4. 6 is a heater for heating the cleaning water, 7 is a nozzle having an injection port for injecting the cleaning water, and 7a is a substantially tubular inlet for taking in the cleaning water. Reference numeral 8 denotes a nozzle bearing that houses the inlet portion 7 a of the nozzle 7 and supports its rotation. Reference numeral 9 denotes a sliding portion when the inlet portion 7 a rotates inside the nozzle bearing 8. The sliding portion 9 is provided with a spacer 9a made of a material having a small frictional resistance. Reference numeral 10 denotes an exhaust port for discharging air from the cleaning tank 1, and 11 denotes a control device that controls the operation of the pump 3, the heater 6, and the like.
[0019]
In this embodiment, the side surface of the substantially tubular nozzle bearing 8 is different from the conventional one in that a plurality of drain holes 12 are provided in the vicinity of the sliding portion 9.
[0020]
Next, the operation of the dishwasher of this embodiment will be described. Since the operation method of the cleaning process is basically the same as the conventional one, the description thereof is omitted. The characteristic operation in this embodiment is a drainage process performed in each process of the cleaning process, the main cleaning process and the rinsing process, and the cleaning water is discharged out of the machine by a drain pump (not shown). When the internal cleaning water is also discharged at the same time, the cleaning water present in the gap between the inlet 7a and the nozzle bearing 8 flows out to the outside of the nozzle bearing 8, and foreign matter and dirty cleaning water are removed from the machine by the drainage pump. of being discharged, inside the nozzle bearing 8 and the nozzle 7, it is that these stains hardly retained. Therefore, the rinsing effect in each step of the rinsing step performed by replacing the washing water is enhanced, and at least the rinsing performance equivalent to the conventional rinsing performance can be obtained. Therefore, it is possible to shorten the operation time mainly for shortening the time of the rinsing process and reduce the amount of water used.
[0021]
In the drying process, air is sent from outside the machine into the washing tank 1 by a blower (not shown), and the heater 6 is operated intermittently to produce hot air, and the hot air evaporates water droplets attached to the dishes. The humid air in the cleaning tank 1 is discharged from the exhaust port 10 to the outside of the machine.
[0022]
(Example 2)
Since the basic configuration of this embodiment is the same as that of the first embodiment and the configurations of the nozzle and the heater are different, this point will be described first.
[0023]
As shown in FIGS. 3, 4, and 5, the substantially tubular inlet portion 20 a of the nozzle 20 is housed in the substantially tubular nozzle bearing 21, and the valve body 22 is mounted facing the inlet portion 20 a. . Further, a plurality of drain holes 23 are provided on the side surface of the nozzle bearing 21. When the cleaning water is pressurized and supplied, the valve body 22 moves upward by pushing up the pressure receiving plate 22a with water pressure, and the sliding portion with the inlet 20a of the nozzle 20 as shown in FIG. 22b is formed. Accordingly, the drain hole 23 is closed by the valve body 22. Further, when the washing water pressure is not applied, the valve body 22 moves downward by its own weight as shown in FIG. 5 to open the drain hole 22, and the discharge port of the pump 3 passes through the drain hole 23 and the inside of the washing tank 1. It becomes the connected composition.
[0024]
The heater 24 is provided at the bottom of the cleaning tank 1 so as to face the drain hole 23, and the upper portion thereof is covered with a cover 25 formed of a heat resistant material. The cover 25 has an opening through which the cleaning water and air can freely pass on the side surface of the heater 24, and the cleaning water and air in the cleaning tank can be heated by the heater 24.
[0025]
Furthermore, the electric motor 26 in this embodiment can control the rotation speed as its output, and the pump 3 not only pressurizes the washing water but also obtains a blowing capacity equal to or higher than that of a conventional blower. is there. Therefore, a dedicated blower is not provided as in the first embodiment.
[0026]
Next, the operation will be described. Since the basic operation is the same as in the first embodiment, the characteristic operation will be mainly described. In particular, when the cleaning water is pressurized in the cleaning process, the valve body 22 moves and closes the drain hole 23, so that there is little leakage of the cleaning water from the drain hole 23. Accordingly, the leakage loss of cleaning water is small, and a predetermined injection force and cleaning performance can be obtained from the nozzle 20. Next, when the pump 3 is not pressurized, the valve body 22 moves downward under its own weight, so that the dirty cleaning water present in the gap between the nozzle bearing 21 and the inlet 20a is discharged from the drain hole 23 or the pump 3. It flows out to the exit. Since this is drained out of the machine, the rinsing effect in the rinsing step is more than conventional. For this reason, at least the same rinsing performance as in the prior art can be obtained with the number of times of rinsing and the amount of washing water. Therefore, the operation time can be shortened and the amount of water used can be reduced.
[0027]
Also in the drainage process, the washing water is also discharged from the inside of the pump 3 by the drainage pump (not shown), and the remaining water is very little, and the intake port 10a communicates with the pump 3 by air. Therefore, by increasing the rotation speed of the electric motor 26 of the pump 3, the air can be similarly pressurized and blown by the centrifugal impeller 4 pressurized with the washing water. When the pump 3 is operated in this manner, air is taken in from the intake port 10a, and is pressurized by the centrifugal impeller 4 through the suction pipe 3a of the washing water, so that dirt and residual water can be more quickly removed from the drain hole 23. Needless to say, a predetermined cleaning performance can be obtained in a shorter time since it is discharged.
[0028]
Further, in the drying process, air is taken in from the air inlet 10a, is pressurized by the centrifugal impeller 4 through the suction pipe 3a of the cleaning water, is sent into the cleaning tank 1 from the drain hole 23 or the nozzle 20, and the heater 6 is turned on. The hot air is generated intermittently and water droplets adhering to the tableware are evaporated by the hot air. The humid air in the cleaning tank 1 is discharged from the exhaust port 10 to the outside. At this time, since the pressurized air is jetted from the nozzle 20 and the drain hole 23, a part of the air is heated by the heater 24, and the rest is directly given to the object to be cleaned, and the adhered water droplets Can be dried. Accordingly, the dishwasher can be cleaned and dried with a single pump 3.
[0029]
In the above-described first embodiment, the pump 3 and the blower (not shown) are provided separately to be a dishwasher capable of cleaning and drying. However, as described above, the rotation of the centrifugal impeller 4 of the pump 3 Needless to say, by controlling the number, the dishwasher can be cleaned and dried with one pump 3.
[0030]
In the second embodiment, the valve body moves inside the nozzle bearing by using the washing water pressure pressurized by the pump as a drive source. However, other drive sources such as a solenoid and an electric motor are used. Needless to say, the same effect can be obtained.
[0031]
In the second embodiment, the pump 3 can pressurize both the washing water and the air by controlling the rotation of the electric motor. It is sufficient if there is a means for switching the route to.
[0032]
【The invention's effect】
Since this invention is comprised as mentioned above, it has an effect as described below.
[0033]
According to the first aspect of the present invention, there is provided a cleaning tank for storing an object to be cleaned, a substantially tubular inlet portion for taking in the cleaning water, and an injection port for injecting the cleaning water. a nozzle for a nozzle bearing generally tubular having a sliding portion for supporting the rotary and furnished the inlet portion of the nozzle, a washing pump for pressurizing flush water, a drain pump for discharging the washing water to the outside of the apparatus comprising, an inlet portion of the nozzle causes through the discharge port and the communication of the washing pump through the sliding portion of the interior of the nozzle bearing, the nozzles bearing the cleaning water present in the gap between the inlet portion of the nozzle A drain hole that discharges water is arranged close to the sliding part, and air is pressurized by the washing pump and sprayed from the nozzle or drain hole. Cleaning water and fine dirt The can be discharged to the outside of the nozzle bearing from weep holes, it is possible to enhance the rinsing effect.
[0034]
According to the invention of claim 2, wherein the present invention, as a sliding portion for supporting the inlet Roh nozzle, provided with a valve body which moves within the nozzle bearing, the valve body during pressurization of the wash water is water When the wash water is not pressurized, it moves to the position to open the drain hole when it is not pressurized.After the cleaning process, the valve body moves to the position to open the drain hole and the nozzle Washing water and fine dirt present in the gap between the inlet and the nozzle bearing can flow out of the nozzle bearing through this drain hole .
[0035]
The invention of claim 3, wherein the present invention is provided with a heater for heating the washing water or air, from the heater is disposed to face the drain hole, heating the portion of the air blown from the pump And the required drying performance can be obtained.
[0036]
Furthermore, the invention according to claim 4 of the present invention is provided with a heater for heating cleaning water or air, and a cover for covering the upper part of the heater is integrated with the lower part of the nozzle or separately under the rotation locus thereof. Because it is installed, the dishwasher can efficiently heat the air, obtain the specified washing performance and drying performance, and does not cause the object to be washed or the user to directly touch the heater that has become hot during the drying process It can be.
[Brief description of the drawings]
FIG. 1 is a main part configuration diagram of a dishwasher according to a first embodiment of the present invention. FIG. 2 is a main part configuration diagram showing a nozzle of the dishwasher . FIG. Figure 6 main part configuration diagram of a conventional dishwasher showing the nozzle in the drying step of FIG. 5 shows the dishwasher showing the nozzle in the wash step of a main part configuration diagram [4] the dishwasher FIG. 7 is a view showing a nozzle of the conventional example.
DESCRIPTION OF SYMBOLS 1 Washing tank 3 Pump 5 Electric motor 6 Heater 7 Nozzle 7a Inlet part 8 Nozzle bearing 9 Sliding part 12 Drain hole

Claims (4)

A nozzle for rotation substantially horizontally has a cleaning tank for accommodating the object to be cleaned, and a injection port for injecting the wash water inlet of the substantially tubular incorporating washing water, and decorated the entrance portion of the nozzle a nozzle bearing generally tubular having a sliding portion for supporting the rotation, a washing pump for pressurizing flush water, comprising a drainage pump to drain the washing water to the outside, the inside of the nozzle bearing the inlet portion of the nozzle The nozzle bearing communicates with the discharge port of the cleaning pump through a sliding portion of the nozzle, and the nozzle bearing has a drain hole for discharging cleaning water existing in a gap between the nozzle inlet portion and the sliding portion. The dishwasher is arranged such that air is pressurized by the washing pump and sprayed from the nozzle or drain hole . As a sliding part that supports the inlet of the nozzle, a valve body that moves inside the nozzle bearing is provided, and the valve body closes the drain hole when the washing water is pressurized, and when the washing water is not pressurized. The dishwasher according to claim 1, wherein the dishwasher is moved to a position where a water drain hole is opened. 3. A dishwasher according to claim 1 or 2 , wherein a heater for heating washing water or air is provided, and the heater is disposed opposite the drain hole. A heater for heating the wash water or air is provided, according to any one of claims 1-3 which is arranged in a separate body below the integral or the rotational locus at the bottom of the cover covering the upper portion of the heater nozzle Dishwasher.

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