JPH11197087A - Table ware washing-drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a temperature load to respective constituent parts by lowering the atmospheric temperature in a casing which has become very hot. SOLUTION: In a casing 2 having a lid body 10, a washing tank 3 which houses tableware, a nozzle 4 which jets washing water and rinsing water to the washing tank, a pump which feeds water in circulation to the nozzle, and a heating heater 6 which heats the water are provided, and this tableware washing-drying machine 1 washes, rinses and dries tableware, and for such a tableware washing-drying machine 1, a blowing fan 8 is arranged in a part housing part 11 between the casing and the washing tank, and the blowing fan 8 and the inside of the washing tank are communicated by an air passage 23, and a ventilation hole 25 is provided on the air passage 23, and in a process wherein dishware are dried, air is fed into the part housing part 11 by the blowing fan 8 from the ventilation hole 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a dishwasher and dryer.

[0002]

2. Description of the Related Art Conventionally, a dishwasher of this type is provided with a washing tank, a nozzle, a pump, a heater, and a blower fan inside a casing. Cleaning is performed by spraying cleaning water with the nozzle.
Then, rinsing water is heated to a predetermined temperature by the sheath heater, which is the heating heater, from the nozzle, and after rinsing tableware with the rinsing water, the rinsing water is discharged, and the fan is operated. The tableware is dried by operating the sheath heater intermittently.

[0003]

However, in the dishwasher / dryer, not only the inside of the washing tank but also the washing tank and the casing are generated by the heat of the rinsing water in the rinsing step and the heat of the sheath heater in the drying step. Also, the ambient temperature in the component housing between them becomes considerably high. Therefore, a considerable temperature load is applied to the control board, the motor of the pump, and the like disposed in the component storage unit.
It is necessary to provide a heat resistant structure to take heat measures. Further, the motor usually has a cooling fan, but this fan alone cannot sufficiently cool the windings of the motor, and a motor using a winding having a sufficient heat-resistant temperature. Has to be applied, and there is a problem that considerable cost is required.

Accordingly, an object of the present invention is to reduce the ambient temperature inside the casing, which has become high, to reduce the temperature load on each component.

[0005]

In order to solve the above-mentioned problems, a dishwasher according to the present invention comprises a washing tank for accommodating dishes in a casing having a lid which can be opened and closed, and the washing tank. A nozzle that injects washing water and rinsing water, a pump that circulates the washing water and rinsing water to the nozzle, and a heater that heats the water,
In the dishwasher for washing, rinsing, and drying the dishes, a blower fan is provided in a component storage section between the casing and the washing tank, and the blower fan communicates with the inside of the washing tank through an air passage. In addition, a ventilation hole is provided in the ventilation path, and in the step of drying the tableware, air is supplied from the ventilation hole to the inside of the component accommodating section by a blower fan.

According to the dishwashing and drying, in the step of drying the dishes, the dishes can be efficiently dried by operating the blowing fan in addition to the residual heat of the dishes. In addition, by supplying air from the blower fan to the inside of the component housing portion through a ventilation hole provided in a ventilation path, the ambient temperature in the component housing portion can be reduced. It is possible to reliably prevent a high-temperature load from being applied to each of the arranged components. For this reason, it is not necessary to provide a special heat-resistant structure in the component housing portion, and it is not necessary to apply a component having such a high heat-resistant temperature.

[0007] In the dishwasher, the ventilation hole is
Preferably, air is supplied to the motor of the pump so that the temperature load on the motor can be sufficiently reduced.

Further, the blower fan is operated also in the step of washing and / or rinsing the tableware, so that rust or short circuit caused by mist generated in the step of washing or rinsing can be suppressed. Is more preferable.

Further, a substrate accommodating portion is provided at a front portion of the casing, and a control substrate and a display panel for controlling components such as the pump, the heater and the blower fan are arranged in the substrate accommodating portion. This is even more preferable since it is not necessary to provide a dedicated heat-resistant structure for the control board.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a dishwasher 1 of the present invention. This dishwasher / dryer 1 includes a dedicated dishwasher 7 and a blower for a well-known dishwasher / dryer having a casing 2, a washing tank 3, a nozzle 4 (4A, 4B), a pump 5, and a heater 6. Fans 8 are provided, and these are controlled by a control board 9 shown in FIG.

The casing 2 is a box having an upper surface opening, and has a lid 10 at an upper portion thereof for closing the opening so that the opening can be opened and closed. Between the casing 2 and a washing tank 3 to be described later, a component housing portion 11 for housing each of the above-mentioned components is provided.
Is configured. Specifically, as shown in FIG. 2, on the front side of the casing 2, a board housing portion 11A for housing the control board 9 and the operation panel 12 is formed. A housing 11B for the pump 5 is formed at one corner on the back side of the casing 2 (the right back side in FIG. 3). Further, the bottom of the casing 2 connects the heater 6, a ventilation passage 23 in which a drying heater 7 and a blower fan 8 described below are disposed, and the pump 5, the washing tank 3, the nozzle 4 and a drainage passage. A housing 11C such as a pipe (not shown) is formed. In the present embodiment, a lock mechanism 13 that locks the lid 10 so that it can be opened and closed is disposed in the substrate housing portion 11A.

The washing tank 3 accommodates a basket (not shown) therein, and various dishes are arranged in the basket. The portions corresponding to the housing portions 11A and 11B have a shape protruding inward. A water recess 14 is formed in the lower part of the washing tank 3. The water recess 14 is connected to the pump 5 by a pipe (not shown), and a metal porous residue filter 15 is provided on the upper surface thereof. In addition, as shown in FIG. 1, a connection pipe 16 for connecting to the ventilation path 23 is integrally formed at the front of the washing tank 3.
Are covered by a cover 17.

The nozzle 4 is for injecting washing water and rinsing water. As shown in FIG. 3, the nozzle 4 is located at the bottom of the washing tank 3 at a position not to interfere with the pump accommodating portion 11B slightly to the left of the center. And a short second nozzle 4B disposed at a position that does not interfere with the pump housing portion 11B on the front right side. The first nozzle 4A and the second nozzle 4B have different peripheral velocities due to injection of washing water and rinsing water by a pump 5 described later. It should be noted that the first and second pump housing portions 11B are also provided at the upper portions thereof.
A third nozzle different from the nozzles 4A and 4B may be provided.

The pump 5 has a motor 18 using a winding having a lower heat-resistant temperature than a conventional dishwasher / dryer.
The cleaning tank 3 is rotated by the drive of the motor 18.
And a cooling fan 20 for cooling the motor 18 by sucking water in the water recess 14 and supplying the water to the nozzle 4 or the drainage path. This pump 5 circulates the washing water and the rinsing water sucked from the washing tank 3 through the nozzles 4A and 4B into the washing tank 3 by rotating a switching valve (not shown) and rotating the same in the normal direction, and reverses the same. The washing water and the rinsing water are drained through a drain passage.

The heater 6 is a sheath heater similar to the conventional one, and is provided with a water reservoir recess 1 inside the washing tank 3.
4. In the vicinity of the heater 6, a temperature sensor (not shown) is provided.

The drying heater 7 comprises a heating wire heater insulated by mica. The blower fan 8 is a known fan rotated by a motor 21. As shown in FIG. 1, the drying heater 7 and the blower fan 8 are arranged such that the drying heater 7 is located on the downstream side inside the ventilation passage 23 provided outside (lower side) of the water reservoir recess 14 of the washing tank 3. It is arranged in.

The ventilation passage 23 has a cylindrical shape, the blower fan 8 is disposed in an opening 24 at one end also serving as an intake port, and the connection pipe 16 of the washing tank 3 is connected to the other end. The cooling air from the blower fan 8 is supplied into the washing tank 3. Also, in this ventilation path 23,
A vent hole 25 for supplying air from the blower fan 8 is provided in the component housing 11. This vent 25
Is formed so that the air discharged from the ventilation hole 25 is supplied to the pump 5. In the present embodiment, no special sealing means is provided at a connection portion between the ventilation passage 23 and the connection pipe line 16 so that the air is supplied into the component accommodating portion 11 from this connection portion. Is set.

The control board 9 controls the components such as the pump 5, the heater 6, the drying heater 7 and the blower fan 8. As shown in FIG. In order to ensure a creepage distance between the panel 12 and the panel 12, the panel 12 is disposed at a predetermined interval. Here, in the conventional dishwasher / dryer, since the control board is disposed at the bottom of the washing tank 3, it is necessary to provide a special heat-resistant structure and a waterproof structure. Since it is arranged in the substrate accommodating portion 11A on the front side, it is not necessary to provide such a heat-resistant structure and a waterproof structure. In addition, the size of the control board 9 does not change,
Even if the occupied area is the same, there is no need to provide the above-mentioned structure, and therefore, there are various advantages such as reduction in size of the dishwasher 1 itself.

Next, the control board 9 of the dishwasher 1
The washing operation of tableware according to the above will be described. First, the user arranges a basket for disposing tableware inside the washing tank 3 and arranges each tableware on the basket, thereby accommodating the tableware in the washing tank 3 and at the same time. A fixed amount of detergent is added, and the lid 10 is closed. Then, the user operates the operation panel 12 on the front of the casing 2 to input information such as the amount of dishes to be washed (for several persons) and then press the start switch.

Then, the control board 9 of the dishwasher 1 opens the electromagnetic valve for water absorption connected to the faucet at home,
After the required amount of water is taken into the washing tank 3 based on the input information, the pump 5 is operated. This allows
The cleaning water in the water recess 14 is sucked by the pump 5, and the water is jetted from the nozzles 4A and 4B. As a result, the nozzles 4 </ b> A and 4 </ b> B circulate and supply the cleaning water to the dishes in the cleaning tank 3 while rotating by the pressure of the supplied cleaning water. This cleaning step is performed by the heater 6
The cleaning water may be supplied while heating the cleaning water at a predetermined temperature.

At this time, in the dishwasher / dryer 1 of the present invention,
Since the two nozzles 4A and 4B are arranged on the same plane so as not to interfere with the accommodating portions 11A and 11B protruding into the cleaning tank 3, even though the protruding portion exists in the cleaning tank 3, The washing water can be uniformly sprayed into the washing tank 3.

During the cleaning step, the pump 5
Is operated, the winding of the motor 18 of the pump 5 generates heat, and accordingly, the ambient temperature of the component housing 11 also increases. In addition, mist due to the injection enters the ventilation path 23, and the mist condenses on the inner wall surface of the ventilation path and the drying heater 7.

Then, when about one minute before the end of the cleaning step set by the input information, the blowing fan 8 is operated. Thereby, the ambient temperature in the motor 18 and the component housing 11 is controlled by the air from the mounted cooling fan 20 and the air from the blower fan 8 supplied through the ventilation hole 25 formed in the ventilation passage 23. Since the cooling is performed, the temperature load applied to each component can be sufficiently reduced. The mist that has entered the ventilation passage 23 is removed by the supply of air by the blower fan 8. Note that the cleaning step may be terminated when dirt is detected by an optical sensor or the like and it is determined that the cleaning has been completed.

When the washing step is completed, the nozzles 4A and 4B, the pump 5 and the blower fan 8 are stopped, the flow path is switched by the switching valve for the pump 5, and then the pump 5 is reversed. The washing water in the washing tank 3 is drained.

When the drainage of the washing water is completed, the pump 5 is stopped again, the flow path is switched by the switching valve, and the electromagnetic valve for water absorption is opened to supply a required amount of water to the washing tank 3.
Then, the pump 5 is rotated forward to perform normal water rinsing.

In the same manner as the above-mentioned washing step, about one minute before the end of the set water rinsing step, the blowing fan 8
Is operated to lower the ambient temperature in the component housing 11 and to remove the mist (condensation) in the ventilation path 23 generated by the water rinse.

Next, after rinsing water is drained in the same manner as described above, the heater 6 is operated while the predetermined amount of water is taken in again, and the water is heated to perform rinsing with warm water heated to a predetermined temperature. .

Then, about one minute before the completion of the hot water rinsing step, the blower fan 8 is operated in the same manner as described above.
As a result, the temperature of the atmosphere in the component housing 11 further increases due to the heat generated by the hot water rinsing, and the steam generated by the hot water rinsing enters the casing 2, but enters the component housing 11 and the cleaning tank 3 by the blower fan 8. By supplying the air, the temperature of the atmosphere in the component housing 3 can be reduced, and the mist that has entered can be removed. As a result, it is possible to lower the temperature of each component disposed in the component housing 11. In addition, it is possible to prevent rust from being generated in the drying heater 7 and the blower fan 8 communicating with the inside of the washing tank 3 by the ventilation passage 23, and to prevent a short-circuit caused by condensation of dewed water on these energized portions. You can eliminate fear. Note that if the blower fan 8 is operated before the hot water rinsing step is completed, it is not always necessary to operate the blowing fan 8 in the washing step and the water rinsing step.

Next, after rinsing the warm water, the dishes are dried. Specifically, in the present embodiment, first, only the blower fan 8 is operated to remove steam in the ventilation passage 23 generated by the hot water rinsing.
The blower fan 8 may continue to operate even when the hot water rinse water is drained.

Then, about 30 seconds after the process proceeds to the drying step, the drying heater 7 is operated, and the air heated by the drying heater 7 is supplied into the washing tank 3. As described above, since the drying process is performed by the dedicated drying heater 7 without using the heating heater 6, the residue attached to the heating heater 6 is scorched, generating a bad smell, and small items such as chopsticks are removed. Burning and melting can be prevented. Further, by providing the exclusive drying heater 7, fine control of the power supplied to the heater 7 becomes possible, the tableware can be efficiently dried, and the working time can be reduced.

When the drying heater 7 and the blowing fan 8 are operated for a time corresponding to the amount of tableware, only the drying heater 7 is stopped first, and only the blowing fan 8 is operated. After a few seconds, the blower fan 8 is stopped to wash the dishes and finish the drying.

As described above, the dishwasher 1 of the present invention
In the drying step, the drying heater 7 is stopped first to supply only the air from the blower fan 8 into the washing tank 3, so that the inside of the washing tank 3 heated by hot air, especially the washed dishes Kind of heat can be cooled. In addition, the temperature of the drying heater 7 and the component housing 11
Each of the components can be cooled, and as a result, it is possible to prevent each component from overheating and causing a failure or the like.

The dishwasher of the present invention is not limited to the above embodiment. For example, in the embodiment, the drying heater 7 dedicated to drying is provided inside the ventilation passage 23.
However, even in a configuration in which the heater 6 is operated intermittently even during drying, the air from the blower fan 8 may be supplied into the component housing 11. In this case, the same operation and effect as described above can be obtained.

[0034]

As is apparent from the above description, in the dishwasher / dryer according to the present invention, a ventilation hole is provided in a ventilation passage for supplying cooling air from the blowing fan into the washing tank, and the air from the blowing fan is provided. Is supplied into the component housing so as to lower the ambient temperature in the component housing, so that the temperature load on each component can be considerably reduced. As a result, it is not necessary to apply components using such heat-resistant materials to the components, and it is not necessary to provide such heat-resistant structures. Therefore, the cost of the dishwasher can be considerably reduced.

Further, since a substrate accommodating portion is provided in the casing, and a control substrate and a display panel which are vulnerable to heat and water are arranged in the substrate accommodating portion, a heat-resistant structure dedicated to the control substrate, Since there is no need to provide a waterproof structure, the cost can be further reduced. In addition, since a space for disposing the control board having a large occupied area is not required in the lower portion of the casing, the dishwasher itself can be reduced in size.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a dishwasher according to the present invention.

FIG. 2 is a cross-sectional view showing a state cut at a different position from FIG.

FIG. 3 is a schematic plan view showing the inside of a cleaning tank.

[Explanation of symbols]

1 ... dishwasher, 2 ... casing, 3 ... washing tank, 4
... Nozzle, 5 ... Pump, 6 ... Heating heater, 7 ... Dry heater, 8 ... Blower fan, 9 ... Control board, 10 ... Lid body, 11
... A component storage section, 12... An operation panel, 13.
14: water recess, 15: residue filter, 16: connecting line, 17: cover, 18: motor, 19: impeller, 2
0: cooling fan, 23: ventilation path, 25: vent hole.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takaaki Isshiki 1-20-5 Tenma, Kita-ku, Osaka-shi, Osaka Elephant-in-Mahobin Co., Ltd. (72) Inventor Tomoo Inoue 1-20, Tenma, Kita-ku, Osaka, Osaka No. 5 Elephant In-Mahobin Co., Ltd.

Claims (4)

[Claims] 1. A washing tank for accommodating tableware in a casing having a lid that is opened and closed, a nozzle for jetting washing water and rinsing water into the washing tank, and the washing water and A dishwasher that includes a pump for circulating rinsing water and a heater for heating the water, and for washing, rinsing, and drying the dishes, a blower fan for a component housing between the casing and the washing tank. Is arranged, and the ventilation fan and the inside of the washing tank are communicated with each other by a ventilation path, and a ventilation hole is provided in the ventilation path,
A dishwasher / dryer, wherein in the step of drying the tableware, air is supplied to the inside of the component storage unit from the vent hole by a blower fan. 2. The pump according to claim 1, wherein the ventilation hole is provided so that air is supplied to a motor of the pump.
The dishwasher / dryer according to item 1. 3. The dishwasher / dryer according to claim 1, wherein the blower fan is operated also in a step of washing and / or rinsing the dish. 4. A substrate accommodating portion is provided at a front portion of the casing, and a control substrate and a display panel for controlling components such as the pump, the heater and the blower fan are arranged in the substrate accommodating portion. The dishwasher / dryer according to any one of claims 1 to 3, characterized in that: