JP3601145B2 - Dishwasher - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dishwasher for washing dishes.
[0002]
[Prior art]
Hereinafter, a conventional dishwasher will be described with reference to FIG. As shown in the figure, the dishwasher main body 61 has a washing tank 62 provided therein, and water or hot water is supplied into the washing tank 62 by a water supply valve 63. When the apparatus is driven, the cleaning water is circulated inside the cleaning tank 62 by a cleaning pump 66 driven by a motor 65. That is, in this circulation, after the washing water is sucked into the washing pump 66 from the drain port 64, the washing water is supplied from the washing pump 66 to the washing nozzle 67 at the bottom of the inside of the washing tank 62, and is jetted from there to wash the dishes. The process is performed again by returning to the drain port 64.
[0003]
A heater 68 for heating the cleaning water is provided between the cleaning nozzle 67 and the bottom of the cleaning tank 62. A tableware basket 69 is arranged above the cleaning nozzle 67 so that the tableware can be arranged neatly and the washing water is effectively sprayed on the tableware. The tableware basket 69 is provided with a plurality of moving rollers so that the tableware basket 69 can be pulled out to the outside of the front surface of the dishwasher main body 61.
[0004]
Further, a door 70 that can be opened and closed is attached to the front part of the cleaning tank 62. Further, a drain pump 71 is provided for discharging the washing water out of the machine. An underframe 72 is provided below the cleaning tank 62 to fixedly support the cleaning tank 62. The fixing may be performed by directly placing the cleaning tank 62 on the underframe 72 or by using another fixing support member.
[0005]
In a conventional dishwasher of this type, both the cleaning pump 66 and the drainage pump 71 have their driving motor 65 rotating in a horizontal direction, and the pump is fixed via an elastic body 73 to the cleaning tank 62 and the underframe 72. in most cases that attach to. Further, the motor 65 is fixed to the cold 却Fu § down 74 to the cooling of the motor 65 itself that axis.
[0006]
[Problems to be solved by the invention]
However, such a conventional configuration has the following problems. First, since it has two pumps and a motor, i.e., a cleaning pump 66 and a drainage pump 71, the volume required for these cleaning mechanisms is large. Therefore, the ratio of the washing volume that can accommodate the dishes to the entire volume of the dishwasher is small. Therefore, the maximum size, the degree of freedom for the shape, the number of tableware, and the like of the tableware that can be stored are limited, so that the tableware storage property is low. In addition, since two sets of pumps and motors for driving the pumps are required, the cost required for these related components and the assembly thereof is high.
[0007]
As a solution to the above-mentioned problem, we have already proposed a method in which washing and drainage are performed by a single motor, the washing mechanism is reduced in size, the tableware storage volume is increased, and the cost is reduced.
[0008]
However, as shown in FIG. 6, in this configuration, there is a problem that drainage noise increases because the first casing 75 on the cleaning side always passes through a state where air is entrained by entraining air during the drainage process. Further, since the washing water in the configuration on the pump is gradually drained from the top at the time of drainage, initially becomes a first washing water is eliminated Eagami state of the casing 75, the first casing 75 even after the temporary stop There is a problem that the washing water in the first impeller 76 does not disappear even in the later stage of the drainage process.
[0009]
Accordingly, the present invention is to solve the conventional problems, and purpose thereof is to provide a dishwasher with reduced drainage noise.
[0010]
[Means for Solving the Problems]
The dishwasher of the present invention has a pump that pressurizes washing water, and a control unit that controls forward / reverse inversion driving of the motor, and a rotating shaft of the motor is provided in a substantially vertical direction. A first casing for discharging cleaning water to a cleaning nozzle by a first impeller, and a second casing for discharging cleaning water out of the machine by a second vortex type impeller provided below the first casing. A washing water guide portion communicating with the first casing, the second casing, and the washing tank, and provided between the first casing and the second casing; and the second vortex type impeller. A third centrifugal impeller disposed on the back surface, and a suction port from the washing water guide to the first impeller or the third impeller is provided on a concentric circle of a rotating shaft of the motor, respectively. A hole in communication with the washing water guide portion 1 of the casing is provided, in which the air that has entered into the first casing and the back to the washing water guide portion.
[0011]
As a result, it is possible to remove the air when the air is spilled, and it is possible to quickly return the discharge capability and reduce the noise at the time of drainage.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 of the present invention is a cleaning tank, a tableware for storing tableware, a cleaning nozzle for injecting cleaning water, a pump for pressurizing the cleaning water by rotation of a motor, and a reciprocal of the motor. and control means for controlling the inversion drive, with substantially provided in the vertical direction the rotation axis of the motor, the pump comprises a first casing for discharging the cleaning water to the cleaning nozzle by a first impeller, the second a second casing for discharging the wash water by the second vortex flow impeller which is disposed below the first casing outside, communicates with said first casing and the second casing and the cleaning tank, and, said first casing and the washing water guide portion provided between the second casing, and a third centrifugal impeller which is disposed in the second vortex impeller rear face, from the washing water guide portion the first-in With Keru set La or the third suction port of each motor to the impeller rotation axis on concentric circles, the holes communicating with the washing water guide portion to the first casing is provided, it enters into the first casing The returned air is returned to the cleaning water guide portion, and acts so as to discharge a part of the cleaning water discharged from the first impeller to the cleaning water guide portion again and discharge the rest to the cleaning nozzle. That is, by providing the circulation path of the washing water in the pump, a part of the air that has entered the first casing during the air dust during the washing is returned to the washing water guide again, and the discharge capability of the first impeller by the air dust Can return early. Further, since the washing water and the air at the time of the air bleeding escape from the first casing at the early stage of drainage, the drainage noise can be reduced.
[0013]
According to a second aspect of the present invention, in addition to the configuration according to the first aspect , a hole communicating with the washing water guide is provided with a first impeller included in the first casing. outer径近near or outwardly than an outer diameter, and the first case and - is positioned in the tongue portion near the single and along the rotational direction during drainage are those obtained by inclined end faces of the holes, washed Without generating the NZ noise caused by the rotation of the first impeller, the cleaning water or a part of the air at the time of air dust can be effectively returned to the cleaning water guide portion. In addition, it is necessary to minimize the drop in the discharge pressure during cleaning, and to generate new NZ noise during cleaning because the cleaning water and air in the first casing are more easily released during drainage. The drain noise can be greatly reduced.
[0014]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
(Embodiment 1)
Hereinafter a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram of a dishwasher equipped with a vertical washing and drainage integrated pump , FIGS. 2 and 3 are sectional views of the vertical washing and draining integrated pump, and FIG . 4 is a partial sectional view of the vertical washing and drainage integrated pump .
[0016]
1 is a washing tank, 2 is a tableware basket for storing tableware, which is provided in the washing tank 1. Reference numeral 3 denotes a pump for pressurizing the washing water, 4 denotes a heater for heating the washing water and tableware, and 5 denotes a washing nozzle having an injection port 6 for ejecting the washing water. The 7 filter to separate the Zan'na, 8 washing pump 3, a control device for controlling the heater 4 and the like.
[0017]
The pump 3 has a first casing 10 for discharging cleaning water to the cleaning nozzle 5 by a first impeller 9 of a centrifugal type and a second casing 11 for discharging cleaning water to a second impeller 11 of a vortex type. And a centrifugal third impeller 13 disposed on the back surface of the second impeller 11 for discharging washing water into the second casing 12 during washing.
[0018]
Further, a washing water guide portion 15 communicating in three directions of a first casing 10, a second casing 12, and a water conduit 14 for introducing washing water from the washing tank 1 to the pump 3 is provided between the two casings. 16 is a first suction port communicating from the washing water guide 15 to the first casing 10, 17 is a second suction port communicating from the washing water guide 15 to the second casing 12, and 18 is a washing water guide. 15 is a third suction port communicating with the second casing 12. A motor 19 for driving the pump 3 is a two-pole induction motor.
[0019]
In addition, a first suction port 16 from the washing water guide 15 to the first impeller 9 and a third suction port 18 to the third impeller 13 are provided on concentric circles of the rotation shaft of the motor 19, respectively. A hole 22 communicating with the washing water guide 15 is provided in the first casing 10 . The water conduit 14 has a suction port 17 of the second impeller 11 provided at a lower position on the lower surface of the side wall of the second casing 12 than in the related art. Forward and reverse inverting means motors 19 (not shown) performs a forward reverse by switching the connection of the main winding and an auxiliary winding of a capacitor and a motor 19 for driving the motor 19. The first impeller 9, the second impeller 11, and the third impeller 13 are mounted on the output shaft of a motor 19, and each impeller rotates in the same direction. Reference numeral 21 denotes a drainage path for discharging the washing water from the pump to the outside of the machine.
[0020]
The configuration of the pump 3 and the operation in the cleaning step will be described in detail. The washing tank 1 and the pump 3 communicate with the first impeller 9 through the first suction port 16 from the washing water guide 15 connected to the water conduit 14 at the bottom of the washing tank 1, and simultaneously with the second impeller 9. The suction port 17 communicates with the second impeller 11. In addition, the washing water guide 15 communicates with the third impeller 13 via the third suction port 18. Here, the first impeller 9 and the third impeller 13 are shaped so as to be able to suck and discharge the washing water from the washing water guide portion 15 when rotating in the clockwise direction and the second impeller 11 when rotating in the counterclockwise direction. They have been set and have configurations called a centrifugal pump and a vortex pump, respectively. In general, a vortex-type pump is capable of switching between a discharge direction and a suction direction depending on a rotation direction.
[0021]
In the main washing step and the rinsing step, the cleaning water is guided from the first suction port 16 of the cleaning water guide section 15 to the first impeller 9 by rotating the motor 19 clockwise. Here, the first impeller 9 works effectively, and the cleaning water is discharged to the cleaning nozzle 5 to perform cleaning. On the other hand, in the same rotation direction, the second impeller 11 first discharges the washing water of the drain passage 21 from the second suction port 17, and here the third impeller 13 discharges the washing water from the third suction port 18. By the function of being discharged into the second casing 12 , a part of the discharged cleaning water is returned from the second suction port 17 to the cleaning water guide portion 15 , and the remaining cleaning water is discharged into the drain passage 21. Will stay.
[0022]
Therefore, the air does not enter the first casing 10 as well as the second casing 12 and the washing water can be stably discharged to the washing nozzle 5.
[0023]
The water level of the washing water remaining in the drain passage 21 is kept constant by optimizing the blade outer diameter and the blade height of the third impeller 13.
[0024]
Here, particularly in the cleaning step, the third impeller 13 discharges the cleaning water into the second casing 12 and the drain passage 21 to prevent the suction of air from the drain passage 21, but the clogging of the filter 7 is prevented. When the pressure is high, the suction flow rate to the pump 3 becomes insufficient, and the pump 3 draws the washing water from the drain passage 21. As a result, air enters the first casing 10 at a stretch, and the first impeller 9 loses its discharge capability. However, a part of the air that has entered the first casing 10 due to the action of the hole 22 returns to the washing water guide 15 again, and the ability of the first impeller 9 is slightly restored, and the air is discharged to the washing nozzle 5. While repeating this cycle, the air in the first casing 10 gradually decreases, and as a result, the discharge capacity of the first impeller 9 is completely restored.
[0025]
Further, in the drainage process by rotating counterclockwise the motor 19 in forward and backward inversion hand stage, washing water is guided from the second suction port 17 to the second impeller 11. Here, the second impeller 11 works effectively to discharge the washing water out of the machine. Further, the third impeller 13 which is a centrifugal impeller works to discharge the washing water from the third suction port 18 into the second casing 12 as in the washing step. That is, at the time of drainage, the operation is performed to improve the drainage capacity.
[0026]
When the drainage process proceeds, the first impeller 9 is in a state of only stirring the air completely as the washing water level is lowered. The washing water remaining in the casing 10 of the first casing 10 can be dropped onto the washing water guide portion 15, and the idling noise in the first casing 10 can be reduced. Therefore, it is possible to reduce the stirring noise of the washing water caused by the first impeller 9 which causes the drainage noise.
[0027]
Further , by positioning the hole 22 outside the outer diameter of the first impeller 9 and in the vicinity of the tongue portion 23 where the discharge pressure is high, it is possible to prevent the occurrence of NZ noise and to effectively supply air to the cleaning guide portion. To discharge. Furthermore, by adopting a configuration in which the end face of the hole 24 is obliquely inclined along the rotating direction at the time of drainage, it is possible to prevent a decrease in the discharge pressure at the time of cleaning and to enhance the effect of discharging air or cleaning water at the time of drainage. And drain noise is further reduced.
[0028]
Regarding the rotation direction of the motor, the effect of the present invention can be similarly obtained regardless of which rotation direction is used for discharging the washing water .
[0029]
As described above, by providing a hole communicating with the first casing from the washing water guide portion, it is possible to quickly recover from a decrease in performance due to air dust at the time of washing, and to achieve a dishwasher that greatly reduces drainage noise. Can be provided.
[0030]
In addition, draining noise is further reduced by adopting a configuration in which the end face of the hole 22 is obliquely inclined along the rotation direction during drainage.
[0031]
【The invention's effect】
According to the invention as set forth in claim 1 of the present invention, it has a pump for pressurizing the washing water, and a control means for controlling the forward / reverse inversion drive of the motor, and the rotation axis of the motor is provided in a substantially vertical direction. The pump discharges cleaning water out of the machine by a first casing that discharges cleaning water to a cleaning nozzle by a first impeller, and a second vortex type impeller provided below the first casing. A second casing, a washing water guide communicating with the first casing, the second casing, and the washing tank, and provided between the first casing and the second casing; And a third centrifugal impeller disposed on the back surface of the vortex-type impeller, and a suction port from the washing water guide to the first impeller or the third impeller is provided on a concentric circle of the rotation shaft of the motor. Provide In both cases, the first casing is provided with a hole communicating with the washing water guide, and the air that has entered the first casing is returned to the washing water guide, so that the discharge capacity can be restored early. And noise at the time of drainage can be reduced.
[0032]
According to the invention of 請 Motomeko 2, wherein a hole communicating with the washing water guide portion, the outside than the outer径近near or outside diameter of the first impeller that is encapsulated in the first casing, and the first It is positioned in the tongue portion near the casing, and because the in the rotation direction during drainage is inclined obliquely to the end face of the bore, without causing NZ sound at the time of washing, it is possible to reduce the noise during drainage it can.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a dishwasher according to a first embodiment of the present invention; FIG. 2 is a cross-sectional view of a main part of a pump of the dishwasher; FIG. FIG. 4 is a sectional view of a main part of a pump of the dishwasher. FIG. 5 is a configuration diagram of a conventional dishwasher. FIG. 6 is a configuration diagram of a conventional dishwasher.
9 First impeller
10 first casing
11 Second impeller
12 second casing 13 third impeller 14 water conduit 15 washing water guide
22 holes

Claims (2)

A washing tank, a tableware for storing the dishes, a washing nozzle for injecting washing water, a pump for pressurizing the washing water by rotation of a motor, and control means for controlling forward / reverse inversion driving of the motor, A rotary shaft of the motor is provided in a substantially vertical direction, and the pump is provided with a first casing for discharging cleaning water to a cleaning nozzle by a first impeller, and a second casing provided below the first casing . communicates with the second casing for discharging the washing water to the outside by the vortex impeller, and the first casing and the second casing and the cleaning tank, and, between the first casing and the second casing in the washing water guide portion provided, and a third centrifugal impeller which is disposed in the second vortex impeller rear face, from the washing water guide portion to the first impeller or third impeller Sucking With Keru set on a concentric circle of the rotational axes of the saw mouth motor, the first a hole for the communication with the washing water guide portion in the casing, the first of the washing water guide portion entering the air in the casing Dishwasher that was set back to . The hole communicating with the washing water guide is located near or outside the outer diameter of the first impeller included in the first casing, near the tongue of the first casing, and at the time of drainage. The dishwasher according to claim 1, wherein an end face of the hole is obliquely inclined along a rotation direction.

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