JP2000189372A - Dish washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with the space for a washing and rinsing pump to simplify the inner piping configuration by housing a washing and rinsing impeller in the rotating central area of a nozzle, and disposing an inflow part in a round hole part of a stator core. SOLUTION: A stator core 44 has a round hole part 45, an inflow part 37 for letting hot water or water flow in a tank 31 passes through the round hole part 45, and a spiral rotary blade 46 for pumping hot water or water, which is formed coaxially with a washing and rinsing impeller 33, is provided in the inside of the stator core. A permanent magnet 41 and a magnet yoke 42 are shaped like a doughnut and supported by a radial rotary blade 40. When the washing and rinsing impeller 33 is rotated by driving magnetic field from a coil 43, hot water or water is subjected to centrifugal force to be discharged from a nozzle 32 toward tableware. Thus, the space for the washing and rinsing pump is not required to simplify the inner piping configuration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher pump mechanism.

[0002]

2. Description of the Related Art In recent years, dishwashers have been well received in order to meet the need for reducing housework after meals.

[0003] In a general dishwasher / dryer, a pump for washing and rinsing and a pump for drainage are arranged at the outer bottom of a tank for accommodating dishes.

[0004]

In such a conventional configuration, the above-mentioned washing / rinsing pump and drainage pump occupy a predetermined volume, so that the volume of the entire apparatus becomes large. It was not ideal in terms of space efficiency.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a configuration which can effectively use a space and realizes a thin device as a whole.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a tank for accommodating tableware, and provided at the bottom of the tank, for flushing and rinsing the tableware with hot or cold water. A rotatable nozzle that discharges water, a washing / rinsing impeller that is disposed at a rotation center inside the nozzle and that is provided with a permanent magnet and a magnet yoke for delivering the hot water or water, and the tank A stator core which is disposed outside and is made of a magnetic material having a circular hole at the center, and a winding laid on the stator core; and an axial gap formed by the washing / rinsing impeller, the stator core and the winding. And an inflow section through which the hot water or water flows into the washing / rinsing impeller through the circular hole.

As a result, it is possible to omit a space for providing a pump for washing and rinsing, which has been required conventionally.
Further, since the inflow portion is disposed inside the circular hole of the stator core, the internal piping configuration can be made very simple.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a tank for accommodating tableware, and hot water or water provided on the bottom of the tank for washing and rinsing the tableware. A rotatable nozzle that discharges water, a washing / rinsing impeller disposed at a rotation center inside the nozzle and provided with a permanent magnet and a magnet yoke for delivering the hot water or water; A stator core formed of a magnetic material having a circular hole at the center and a winding laid on the stator core, and an axial gap type formed by the washing / rinsing impeller, the stator core, and the winding. And an inflow section through which the hot water or water flows into the washing / rinsing impeller through the circular hole.

The washing / rinsing impeller has a coaxial structure, and has a drain impeller for operating in a rotation direction opposite to the rotation direction in which the washing / rinsing impeller operates, and for draining hot water or water in a tank. is there.

As described above, since the washing / rinsing impeller is built in the center of rotation of the nozzle and the inflow portion is arranged in the circular hole of the stator core, the space for the washing / rinsing pump which was conventionally required is not required. And the internal piping configuration can be very simple.

In addition, the cleaning and rinsing impeller has a coaxial configuration,
By providing the drainage impeller which works in the opposite rotation direction, the motor for the drainage pump which has been required conventionally becomes unnecessary, and the space efficiency can be further improved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows an embodiment of the present invention. 1 is a tank for accommodating tableware, and 2 is a rotatable nozzle for discharging hot water or water to the tableware. Reference numeral 3 denotes a washing / rinsing impeller which is built in the center of rotation of the nozzle and sends out hot water or water. 4 is a washing / rinsing impeller 3
And 5 are driving circuits for supplying electric power to the stator unit 4. Reference numeral 6 denotes a circulation path for circulating hot water or water at the time of cleaning or rinsing, and reference numeral 7 denotes an inflow portion for flowing hot water or water into the cleaning / rinsing impeller 3.

FIG. 2 shows a detailed configuration of the cleaning / rinsing impeller 3 and the stator unit 4. As shown in FIG. 1, reference numeral 2 denotes a nozzle, and reference numeral 3 denotes a washing / rinsing impeller for sending hot water or water. The washing / rinsing impeller 3 is built in the center of rotation of the nozzle 2 and is itself rotatably supported. The washing / rinsing impeller 3 is provided with radial rotating blades 8 for applying centrifugal force to hot water or water. Below the washing / rinsing impeller 3, a permanent magnet 9 and a magnet yoke 10 are laid. A winding 11 for applying a rotating torque to the permanent magnet 9 and a stator core 1 are provided outside the tank 1 to rotate the washing / rinsing impeller 3.
2 are provided. The stator section 4 in FIG. 1 is constituted by these windings 11 and the stator core 12. The stator core 12, the winding 11, the permanent magnet 9, and the magnet yoke 10 constitute an axial gap type electric motor.

The stator core 12 has a circular hole 13, and the inflow portion 7 into which hot water or water flows into the tank 1 is formed by the circular hole 13.
Are provided to pass through. Further, inside the inflow portion 7, a spiral rotary blade 14 for sucking hot water or water is provided in a coaxial configuration with the washing / rinsing impeller 3.

The permanent magnet 9 and the magnet yoke 10 have a donut disk shape and are supported by radial rotors 8. With this configuration, hot water or water is led out from the inflow portion 7 to the radial rotor 8.

The cleaning / cleaning by the driving magnetic field from the winding 11
When the rinsing impeller 3 rotates, hot water or water receives centrifugal force, pressure is applied toward both ends of the nozzle 2, and the hot water or water is discharged from the nozzle 2 toward tableware.

Next, the structure of the cleaning / rinsing impeller 3 will be described in detail. FIG. 3 shows the configuration. 8 is a radial rotor, 9 is a permanent magnet, and 10 is a magnet yoke for passing the magnetic flux of the permanent magnet 9. The permanent magnet 9 constitutes a so-called quadrupole rotor having two pairs of N poles and S poles. The permanent magnet 9 and the magnet yoke 10 constitute a rotor 15 of an axial gap type electric motor. The washing / rinsing impeller 3 is thus equipped with the radial rotor 8 and the rotor 15.
Are integrally formed. 16A and 16
B is a protrusion for appropriately fixing the washing / rinsing impeller 3 and can be rotated about the protrusion.

Next, the structure of the winding 11 and the stator core 12 will be described in detail with reference to FIG. Reference numeral 12 denotes a stator core made of a magnetic material, and reference numeral 11 denotes a winding wound around the stator core 12. There are a total of six windings 11, and diagonal windings are connected in series to form three sets of coils, which are so-called three-phase connections in which they are star-connected.
The stator 17 of the axial gap type electric motor is constituted by the stator core 12 and the winding 11. 18 is a Hall element, and there are three in total. These Hall elements 1
Numeral 8 is for detecting the polarity and position of the magnetic pole of the rotor 15 and appropriately switching the energization to the winding 11. The stator core 12 has a circular hole portion 13 at the center portion, and the inflow portion 7 is disposed through the circular hole portion 13.

Next, the configuration of these drive circuits is shown in FIG. 19 is a commercial power supply, and 20 is a drive circuit. Reference numeral 21 denotes a power supply unit for rectifying and smoothing the commercial power supply 19 to provide a DC power supply, 22 denotes an inverter that supplies the DC output of the power supply unit 21 to the three-phase winding 11 with an appropriate polarity, and 23 denotes a Hall element 1.
8 is a three-phase distribution unit that issues an appropriate output command to the inverter 22 based on the output of the inverter 8.

As is clear from the above description,
The rotor 15 and the stator 17 form an electric motor of an axial gap type three-phase four-pole brushless DC motor. Generally, the tank 1 is made of a non-magnetic stainless steel plate. Even if the stator 17 and the rotor 15 are arranged via the wall material as in the present embodiment, the tank 1 is non-magnetic. The rotor 15 can be rotated without any problem.

As described above, according to the present embodiment, hot water or water can be discharged without providing a special pump device outside the tank, and a very space-efficient dishwasher / dryer is provided. Can be realized.

Further, since the inflow portion 7 is disposed so as to pass through the circular hole portion 13 of the stator core 12, it can be seen that the entire piping configuration can be made very simple.

In this embodiment, the winding 11 is directly wound around the stator core 12 with consideration given to insulation, but it goes without saying that the same effect can be obtained by using an appropriate winding bobbin.

(Embodiment 2) Next, another embodiment of the present invention will be described. FIG. 6 shows the configuration. 31 is a tank for accommodating tableware, and 32 is a rotatable nozzle for discharging hot water or water to the tableware. Reference numeral 33 denotes a washing / rinsing impeller which is built in the center of rotation of the nozzle and sends out hot water or water. Reference numeral 34 denotes a stator unit for applying a rotational driving force to the washing / rinsing impeller 33, and reference numeral 35 denotes a drive circuit for supplying electric power to the stator unit 34. 36 is a circulation path for circulating hot water or water during cleaning or rinsing, and 37 is
This is an inflow section for flowing hot water or water into the rinse impeller 33. 38 is a drain impeller for draining, 3
9 is a drainage path.

FIG. 7 shows a detailed configuration of the washing / rinsing impeller 33, the drain impeller 39, and the stator section 34. As shown in FIG. 6, reference numeral 32 denotes a nozzle, and reference numeral 33 denotes a washing / rinsing impeller for sending hot water or water. The washing / rinsing impeller 33 is built in the center of rotation of the nozzle 32,
And it is rotatably supported by itself. The washing / rinsing impeller 33 is provided with radial rotating blades 40 for applying centrifugal force to hot water or water. A permanent magnet 41 and a magnet yoke 4 are provided below the washing / rinsing impeller 33.
2 are laid. A winding 43 and a stator core 44 for applying a rotating torque to the permanent magnet 41 are provided outside the tank 31 to rotate the washing / rinsing impeller 33. The stator section 34 shown in FIG. 6 includes the windings 43 and the stator core 44. The stator core 44, the winding 43, the permanent magnet 41 and the magnet yoke 42 constitute an axial gap type electric motor.

The stator core 44 has a circular hole 45, and an inflow portion 37 into which hot water or water flows into the tank 31 is provided through the circular hole 45. Further, the inflow portion 37
Is provided with a spiral rotary blade 46 for sucking hot water or water in a coaxial configuration with the washing / rinsing impeller 33.

The permanent magnet 41 and the magnet yoke 42 are in the form of a donut disk.
Supported by 0. With this configuration, hot water or water is led out from the inflow portion 37 to the radial rotor 40.

The cleaning by the driving magnetic field from the winding 43
When the rinsing impeller 33 rotates, hot water or water is subjected to centrifugal force, pressure is applied toward both ends of the nozzle 32, and the hot water or water is discharged from the nozzle 32 toward tableware.

The drain impeller 39 is formed coaxially with the washing / rinsing impeller, and rotates in the same manner. However, in order to send out hot water or water, the shape of the rotating blades is effective so as to work effectively in opposite rotation directions. It has become. Therefore, when draining is performed, the cleaning / rinsing impeller 33 is driven to rotate in the reverse rotation direction to that during the cleaning / rinsing. Thereby, at the time of drainage, hot water or water is sent out in the direction of the drainage path 40 without being discharged from the nozzle 32.

By adopting such a configuration, drainage can be performed without providing a motor for a drainage pump, and the advantages described in the first embodiment can be simultaneously maintained. For this reason, space efficiency can be further improved.

[0032]

As is apparent from the above embodiment, according to the first aspect of the present invention, the cleaning / rinsing impeller is built in the rotation center of the nozzle, and the inflow portion is arranged in the circular hole of the stator core. As a result, the space for the pump for washing and rinsing, which was conventionally required, is not required, and the internal piping configuration can be made very simple.

According to the second aspect of the present invention, cleaning and
By providing a drainage impeller that is coaxial with the rinse impeller and that works in the opposite rotational direction, the motor for the drainage pump, which was conventionally required, is not required, and the space efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a main part of a first embodiment of the present invention.

FIG. 3 is a configuration diagram of a cleaning / rinsing impeller according to the first embodiment of the present invention.

FIG. 4 is a configuration diagram of a stator core and windings according to the first embodiment of the present invention.

FIG. 5 is a configuration diagram of a drive circuit according to the first embodiment of the present invention.

FIG. 6 is a configuration diagram of a second embodiment of the present invention.

FIG. 7 is a configuration diagram of a main part of a second embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tank 2 nozzle 3 washing / rinsing impeller 7 inflow section 9 permanent magnet 10 magnet yoke 11 winding 12 stator core 13 circular hole section 31 tank 32 nozzle 33 washing / rinsing impeller 37 inflow section 39 drain impeller 41 permanent magnet 42 magnet yoke 43 winding Wire 44 Stator core 45 Circular hole

Claims (2)

[Claims] 1. A tank for accommodating tableware, a rotatable nozzle disposed at the bottom of the tank for discharging hot water or water to the tableware, and a rotation inside the nozzle for delivering hot water or water. A washing / rinsing impeller disposed at the center and having a permanent magnet and a magnet yoke laid thereon; a stator core disposed outside the tank and formed of a magnetic material having a circular hole at the center; The washing / rinsing impeller, the stator core, and the windings constitute an axial gap type electric motor, and the washing / rinsing impeller penetrates the circular hole to provide the washing / rinsing impeller with hot water or water. Dishwasher having an inflow section for inflow of water. 2. The cleaning / rinsing impeller has a coaxial structure, and has a drainage impeller that operates in a rotation direction opposite to a rotation direction in which the cleaning / rinsing impeller operates and drains hot water or water in a tank. Item 10. A dishwasher / dryer according to item 1.