JP2004275364A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the amount of washable dishes by increasing the volume of a washing tub without enlarging a main body shape. <P>SOLUTION: For a dishwasher, the rotary shaft 11 of the impeller of a washing pump 4 and the rotary shaft 12 of a motor 5 are made concentric in an almost vertical direction. Also, the motor 5 and the washing pump 4 are disposed in a space part A formed at the side part of a water storage part 2 expanded downwards from the bottom part of the washing tub 1 and below the bottom part of the washing tub 1 facing the rotary track of a washing nozzle 3, and a clearance 17 for making air for cooling the motor 5 flow is formed between the upper surface of the motor 5 and the bottom part outer surface of the washing tub 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dishwasher for washing dishes.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 4 and 5, this type of dishwasher has a dishwasher in which washing water in a water storage unit 2 provided at the bottom of a washing tank 1 is accommodated in a washing tank 1 from a rotatable washing nozzle 3. And a cleaning pump 4 for injecting water toward. The cleaning pump 4 is configured in a substantially vertical direction concentric with the rotation axis of the motor 5 and is disposed in the space below the cleaning tank 1 so as to deviate from the rotation trajectory 6 of the cleaning nozzle 3 (for example, see Patent Document 1). ).
[0003]
Therefore, as shown in FIG. 5, even if the cleaning tank 1 is avoided and the cleaning tank 1 is made as large as possible so that no useless space is formed in the housing 7, the portion 8 deviating from the rotation locus 6 of the cleaning nozzle 3 can be obtained. Is not an effective washable area, the washable space in the washing tank 1 is narrowed, and if a predetermined washable space is secured, the housing 7 for accommodating the washing tank 1 becomes large, and the narrow space becomes small. There is a problem that it is difficult to install the device on a computer.
[0004]
Therefore, in order to secure a space that can be cleaned without increasing the size of the housing 7, the cleaning pump 4 is configured to be substantially horizontal and concentric with the rotation axis of the motor 5, as shown in FIG. It is conceived to dispose it in a space 9 below the bottom of the cleaning tank 1 facing the rotation trajectory (see, for example, Patent Document 2).
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. Hei 9-131292 [Patent Document 2]
JP 2001-198071 A
[Problems to be solved by the invention]
However, according to the configuration described in Patent Literature 2, since the outer shapes of the cleaning pump 4 and the motor 5 become thinner, predetermined pump performance can be obtained unless the number of revolutions of the motor 5 is increased significantly. In addition, a new problem arises in that the driving noise and vibration at the time of driving the motor 5 increase, which adversely affects the life of the motor, and the cleaning space in the cleaning tank 1 is increased without increasing the size of the housing 7. Was difficult.
[0007]
The present invention has been made to solve the above-described problems, and has an object to provide a dishwasher capable of increasing the volume of a dishwasher by enlarging the volume of a washing tank without increasing the outer shape of a main body formed by a housing. It is intended to provide.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a dishwasher according to the present invention is configured so that the rotation axis of the impeller of the cleaning pump and the rotation axis of the motor are substantially concentric with each other, and swells downward from the bottom of the cleaning tank. The motor and the cleaning pump are disposed in a space formed below the bottom of the cleaning tank opposite to the rotation locus of the cleaning nozzle, on the side of the water storage unit, and the upper surface of the motor and the outer surface of the bottom of the cleaning tank. And a gap for flowing the cooling air of the motor.
[0009]
As a result, the volume of the washing tank can be increased without increasing the size of the main body, and the amount of tableware that can be accommodated can be increased. Even when the motor and the washing pump are arranged in a narrow space below the bottom of the tank, the motor can be efficiently cooled and the temperature rise can be suppressed.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 of the present invention provides a cleaning tank having a water storage section, a cleaning pump for pressurizing the cleaning water in the water storage section, and cleaning water pressurized by the cleaning pump in the cleaning tank. A rotatable cleaning nozzle for jetting, and a motor for driving the cleaning pump are provided, and the rotation axis of the impeller of the cleaning pump and the rotation axis of the motor are concentrically configured in a substantially vertical direction. The motor and the cleaning pump are disposed in a space formed below the bottom of the washing tank opposite to the rotation trajectory of the washing nozzle on the side of the water reservoir swelling downward from the bottom. A gap is formed between the upper surface and the outer surface of the bottom of the washing tank to allow the cooling air of the motor to flow, and the volume of the washing tank can be increased without increasing the size of the main body, so that the tableware can be accommodated. Increase the amount In addition to being able to wash a large amount of dishes in a compact body shape, even if a motor and a washing pump are arranged in a narrow space below the bottom of the washing tank, the motor can be cooled efficiently to increase the temperature. Can be suppressed.
[0011]
According to a second aspect of the present invention, in the first aspect of the present invention, a fan for cooling the motor is provided on an upper surface side of the motor, and a concave portion which is recessed upward is provided on a bottom portion of the cleaning tank. The fan is accommodated therein, and the fan is compactly accommodated in the space below the bottom of the washing tank, so that the motor can be efficiently cooled.
[0012]
According to a third aspect of the present invention, in the first or second aspect of the present invention, an air passage having a region extending in the direction of the rotation axis is formed inside the motor, and the air drawn in from below the motor is: The motor flows out from the gap provided between the bottom of the washing tank and the outer surface of the washing tank through the ventilation path to the outer peripheral direction of the motor, so that the inside and the outer surface of the motor can be efficiently cooled simultaneously.
[0013]
According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the concave portion provided at the bottom of the cleaning tank is provided with an inwardly rising inclined portion or a curved surface portion on the outer peripheral edge on the opening side. In addition, the air that has passed through the inside of the motor and has reached the outer surface of the bottom of the cleaning tank can smoothly flow toward the outer periphery of the motor to improve the cooling effect.
[0014]
According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, a guide portion for guiding the air flowing out of the air passage of the motor to the rotating shaft side of the motor is provided. The area in contact with the upper surface of the motor can be increased to improve the cooling effect.
[0015]
According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, the motor is configured by a toroidal motor, and is compactly provided in a low-height space formed on the side of the water storage section. Can be arranged.
[0016]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
(Example 1)
1 to 3, reference numeral 1 denotes a washing tank for installing a dish basket 6 and washing dishes, a water supply path for guiding tap water to a main body 7 of the dishwasher, a water supply valve for stopping or supplying tap water, and a water supply valve. A water storage unit 2 for storing water supplied by a water level sensor (not shown) including a water level sensor for keeping the water at a predetermined water level and a control circuit is provided at the bottom.
[0018]
Reference numeral 4 denotes a washing pump for pressurizing the stored water. The washing pump 4 has a rotating shaft 11 of an impeller 10 in the washing pump 4 and a rotating shaft 12 of a motor 5 serving as a driving source of the washing pump 4, which are concentrically arranged in a substantially vertical direction. At the same time, a washing nozzle 3 for injecting washing water toward tableware placed in a tableware basket 6 as a washing means for washing tableware beside the water storage part 2 bulging downward from the bottom of the washing tank 1. A space A is formed below the bottom of the washing tank 1 facing the rotation locus of the motor, and a motor 5 and a washing pump 4 are disposed in the space A. The motor 5 is constituted by a toroidal motor suitable for forming a low height. 8 is a heater for heating water in the water storage unit 2, 9 is a filter, and 13 is a drainage pump for draining sewage after washing dishes.
[0019]
The cleaning pump 4 is configured substantially concentrically with a rotating shaft 11 of the impeller 10 and a rotating shaft 12 of a motor 5 that is a driving source of the cleaning pump 4, and a water reservoir swelling downward from the bottom of the cleaning tank 1. A space A below the bottom of the washing tub 1 on the side of 2 and opposite to the rotation trajectory of the washing nozzle 3 for spraying washing water toward the dishes placed in the dish basket 6 as washing means for washing dishes. Are located in
[0020]
Therefore, a washable space in the washing tank 1 can be ensured, and the outer dimensions of the washing pump 4 can also be ensured, and the problem of increasing the rotation speed of the motor 5 is eliminated, so that the shape of the main body 7 of the dishwasher is enlarged. The volume of the dishware can be increased by expanding the capacity of the washing tub 1 without cleaning, and a large amount of dishes can be washed with a compact dishwasher body 7 shape. When the washing tank 1 is set to a predetermined volume, the size of the main body 7 of the dishwasher can be promoted, and the ease of installation in a narrow place can be improved.
[0021]
The cleaning pump 4 is provided such that its bottom is substantially the same height as the bottom of the water storage unit 2 or is higher than the bottom of the water storage unit 2. The water can flow to the water storage unit 2 without staying inside, and the remaining water at the time of drainage can be reduced to improve the washing efficiency.
[0022]
The cleaning pump 4 and the motor 5 are directly attached to the outer bottom of the cleaning tank 1 from below by screws or the like, which has been a problem when conventionally mounted via anti-vibration rubber. The variation in the relative positional relationship between the pumps 4 can be reduced, the watertightness of the circulation path such as the water conduit 14 for circulating the cleaning water can be improved, and the rotation as the main vibration source of the cleaning pump 4 and the motor 5 can be achieved. Vibration in the direction (electromagnetic sound) can be received in the torsion direction of the mounting portion 16 provided in the washing tub 1, and vibration transmission to the main body 7 of the dishwasher when the motor 5 is driven can be reduced. Of course, if a vibration isolating means such as a conventional vibration isolating rubber is provided, the vibration transmission can be further reduced.
[0023]
The cleaning pump 4 and the motor 5 are arranged above the cleaning pump 4 and the motor 5 is mounted on the outer bottom of the cleaning tank 1 so that the length of the mounting portion 16 can be shortened. The vibration amplitude can be suppressed by increasing the rigidity in the torsional direction to stabilize the driving of the heavy motor 5, and the mechanical stress caused by the vibration applied to the cleaning pump 4 and the circulation path connected to the cleaning pump can be reduced. In addition, the reliability of the watertight seal at the connecting portion such as the water conduit 14 can be improved.
[0024]
A gap 17 is formed between the upper surface of the motor 5 and the outer surface of the bottom of the cleaning tank 1. The cooling air of the motor 5 flows through the gap 17 to efficiently cool the upper surface of the motor 5. The temperature rise can be suppressed, and the operation at a low temperature can be realized together with the suppression of the number of revolutions by increasing the diameter of the cleaning pump 4.
[0025]
A fan 19 for cooling the motor 5 is provided on the upper surface side of the motor 5, and a recess 18 is provided at the bottom of the washing tank 1, and at least a part of the fan 19 is accommodated in the recess 18. By doing so, the fan 19 can be compactly accommodated in the space below the bottom of the cleaning tank 1 and the motor 5 can be efficiently cooled.
[0026]
Inside the motor 5, an air passage 20 having a region extending in the same direction as the rotating shaft 12 is formed, and the air drawn in from below by driving the motor 5, as shown by an arrow in FIG. The gas flows out from the gap 17 provided between the cleaning tank 1 and the bottom outer surface of the cleaning tank 1 through the ventilation path 20 toward the outer peripheral direction of the motor 5, so that the inside, the lower surface, and the upper surface of the motor 5 can be simultaneously and efficiently cooled.
[0027]
The concave portion 18 provided at the bottom of the cleaning tank 1 has an inclined portion 21 which rises inward at the outer peripheral edge on the opening side, and the air that has passed through the inside of the motor 5 and has reached the outer surface of the bottom of the cleaning tank 1 can be removed. 5 can flow smoothly in the outer peripheral direction, and the cooling effect can be improved. In addition, the said inclined part 21 may be formed in a curved surface part.
[0028]
The fan 19 is provided with a guide 22 that guides the air flowing out of the air passage 20 of the motor 5 to the rotating shaft 12 side of the motor 5, so that the performance of the fan 19 is improved and the air fan immediately after leaving the fan 19 19 can be suppressed, and the area where the cooling flow contacts the upper surface of the motor 5 can be increased to improve the cooling effect.
[0029]
The outer shape of the motor 5 is formed larger than the outer shape of the cleaning pump 4 and a terminal portion 23 for electrically connecting the motor 5 is provided. The terminal portion 23 is disposed below the motor 5 from the lower end of the motor 5. It is configured to protrude to the side of the cleaning pump 4, and the thickness of the motor 5 can be reduced to reduce the space below the bottom of the cleaning tank 1. In addition to promoting the increase in size, the motor 5 can be electrically connected by effectively utilizing the space below the motor 5 formed on the side of the cleaning pump 4, and the bottom of the cleaning tank 1 can be connected. The electric connection of the motor 5 attached to the motor can be facilitated.
[0030]
Next, the operation of the above embodiment will be described. First, tap water is supplied into the cleaning tank 1 by the water storage amount control means. The supplied water is stored in a water storage unit 2 provided at the bottom of the washing tank 1, and when the water level reaches a predetermined level, the water supply is stopped by the water storage amount control unit. Next, the cleaning pump 4 is operated, and the cleaning water in the water storage unit 2 is pressurized by the cleaning pump 4, conveyed to the cleaning nozzle 3 through the water conduit 14, and is transmitted from the nozzle hole 15 to the dish basket 6 in the cleaning tank 1. It is sprayed toward the placed tableware to perform washing.
[0031]
A plurality of circulation paths are configured so that the washed washing water returns to the water storage unit 2 again. At that time, the washing water is heated by the heater 8 to a preset appropriate high temperature to enhance the washing power, and the contaminants of the washed washing water return to the filter 9 when returning to the water storage unit 2. To prevent re-adhesion of contaminants when circulating and washing. When the washing is completed, the washing water in the washing tank 1 is drained by the drain pump 13.
[0032]
【The invention's effect】
ADVANTAGE OF THE INVENTION As mentioned above, according to this invention, the volume of a wash tub can be increased and the volume of washable dishes can be increased without enlarging a main body shape, and a large amount of dishes can be washed with a compact main body shape. can do.
[Brief description of the drawings]
1 is a sectional view of a dishwasher according to a first embodiment of the present invention; FIG. 2 is a sectional view of a main part of the dishwasher; FIG. 3 is an enlarged sectional view of a washing pump and a motor of the dishwasher; Sectional view of the dishwasher [Figure 5] Top view of the dishwasher [Figure 6] Sectional view of another conventional dishwasher [Explanation of reference numerals]
DESCRIPTION OF SYMBOLS 1 Cleaning tank 2 Water storage part 3 Cleaning nozzle 4 Cleaning pump 5 Motor 11 Rotating shaft 12 Rotating shaft 17 Gap 18 Depression 19 Fan 20 Vent A space

Claims (6)

A cleaning tank having a water storage unit, a cleaning pump for pressurizing the cleaning water in the water storage unit, a rotatable cleaning nozzle for injecting the cleaning water pressurized by the cleaning pump into the cleaning tank, and the cleaning pump A motor for driving the washing pump, the rotating shaft of the impeller of the washing pump and the rotating shaft of the motor are arranged in a substantially vertical direction concentric with each other, and a lateral side of a water storage part swelling downward from the bottom of the washing tank. And, the motor and the cleaning pump are disposed in a space formed below the bottom of the cleaning tank facing the rotation trajectory of the cleaning nozzle, and the motor and the cleaning pump are disposed between the upper surface of the motor and the bottom outer surface of the cleaning tank. A dishwasher with a gap that allows motor cooling air to flow. 2. The dishwasher according to claim 1, wherein a fan for cooling the motor is provided on an upper surface side of the motor, and a recess recessed upward is provided at a bottom of the washing tank, and the fan is accommodated in the recess. An air passage having a region extending in the direction of the rotation axis is formed inside the motor, and air drawn in from below the motor passes through the air passage through a gap provided between the motor and a bottom outer surface of the washing tank. The dishwasher according to claim 1 or 2, wherein the dishwasher flows out in the outer peripheral direction of the dishwasher. The dishwasher according to any one of claims 1 to 3, wherein the concave portion provided at the bottom of the washing tank has an inwardly inclined portion or a curved surface portion provided on an outer peripheral edge on an opening side thereof. The dishwasher according to any one of claims 1 to 4, further comprising a guide portion for guiding air flowing out of a ventilation path of the motor toward a rotation shaft of the motor. The dishwasher according to any one of claims 1 to 5, wherein the motor is a toroidal motor.

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