JPS5814674Y2 - electric equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electric device consisting of an intimate device and a slave device that can be separated from each other.

Generally, as this type of electric equipment, a cooking mixer is known in which a mixer bottle, which is a slave device, can be detachably attached to the main body of the mixer.

By the way, this type of sharp tool is usually equipped with an electric motor, but when the stator is attached closely and the magnetic rotor is attached to the child device, when the child device is attached closely, the stator and magnet rotor It is conceivable that the two motors face each other with a predetermined gap to form a commutatorless motor.

In this case, a control circuit using a semiconductor switching element such as a transistor or a thyristor is used to wind a stator coil around the closely attached stator and control the excitation of the stator coil according to the position of the magnet rotor relative to the stator. Of course, it is necessary to provide

However, with this configuration, the operation of the control circuit becomes unstable due to temperature rise caused by heat generation of the stator coil, and the stator coil itself may become unstable.
The performance of the body may deteriorate due to heat generation, or it may even burn out due to excessive heat generation.

Therefore, cooling is required to alleviate such temperature rise.

This invention, as described above, provides a stator in the compact, a magnetic rotor in the sub-device, and when the stator and the sub-device are combined, the stator, the magnetic rotor,
and a motor configured by a motor control circuit, the invention provides an electric device that can efficiently cool the stator, magnet rotor, and control circuit, and has a simple configuration. .

An embodiment of this invention will be described below with reference to the drawings.

This embodiment is an application of this invention to a cooking mixer.

In the figure, 1 is a mixer, that is, the main body of the mixer.

This main body 1 has a hollow annular cover 3 mounted on a substrate 2, a bolt loading recess 4 is formed in the center thereof, and a control circuit storage chamber 5 is formed around the outer periphery of the recess 4.

An annular stator 6 made of ferrite is attached to the inner bottom surface of the recess 4 with screws 26 so as to be suspended from the substrate 2.

This stator 6 has a plurality of teeth protruding in the opening direction of the recess 4, and a stator coil (not shown) is wound around each of the teeth.

A control circuit 7 for controlling the supply of excitation current to the stator coil is housed in the storage chamber 5.

On the other hand, a slave device, that is, a mixer bottle 8, which can be detachably attached to the recess 4 is provided.

This mixer bottle 8 has a magnetic rotor 10 rotatably supported on one surface of a bottle support 9, and a cylindrical skirt portion 1 that surrounds the rotor 10.
1 is formed, and when this skirt portion 11 is installed in the recess 4, the rotor 10 is made to face the upper surface of the stator 6, and a certain gap can be maintained.

The magnet rotor 10 is constructed by, for example, as shown in FIG.
In between, a plurality of grooves 14 are formed radially outward from the center.
We are trying to form a

The lower end of the bottomless bolt 16 is watertightly screwed into a cylindrical bolt branch 15 protruding from the other surface of the bolt support by inserting, for example, a packing 17 therein.

Then, a cutter 18 is disposed within the bolt 16, and the rotor 10 and the cutter 18 are integrated via a spindle 20 inserted through a watertight bearing 19 provided at the center of the bottle support 9, and the bottle support It is rotatably supported on the shaft.

Note that a handle is provided protruding from the side surface of the bottomless bottle 16, and a lid is provided on the opening.

A position detector (not shown) for detecting the rotational position of the rotor 10 relative to the stator 6 is attached to a position facing the magnet piece of the magnet rotor, for example, on the upper surface of the stator 6, and the position obtained from this position detector is attached. The signal is supplied to a control circuit 7 housed in a control circuit storage chamber 5 of the main body 1.

A suction port 21 is provided in the control circuit storage chamber 5, and communication ports 22 are provided in the storage chamber 5 and the skirt portion 11 of the mixer bottle 8, respectively, to communicate between the storage chamber 5 and the skirt portion 11.
．． 23, a ventilation port 24 is provided in the shaft portion of the magnet holder 12, an exhaust port 25 is provided in the upper end of the skirt portion 11, and the inlet port 21. Communication port 22.2
3 and the center hole of the stator 6, the ventilation port 24, and the exhaust port 2
5 to form a ventilation path communicating with the outside.

With such a configuration, the mixer bottle 8 can be attached to the mixer main body 1 by loading the skirt portion 11 of the mixer bolt 8 into the recess 4 of the mixer main body 1.

This mounted state is reliably maintained by the attraction force generated by the magnetic force acting between the magnet rotor 10 and the stator 6.

Then, the magnet rotor 10 faces the stator 6 with a predetermined gap therebetween, thereby forming a non-commutator motor. Therefore, the control circuit 7 is powered on to control the excitation of the stator coil 6. For example, the magnet rotor 10 rotates, and the cutter 18, which is integrated with the magnet rotor 10 via the spindle 20, rotates together with the cutter 18, so that it operates as a mixer.

The rotor 10 has a plurality of magnet pieces 13 annularly attached to a magnet holder 12, and a plurality of grooves 14 are formed radially outward from the center between adjacent magnet pieces 13. Since there is, this magnet piece 1
The convex portion consisting of the rotor 1 acts as a fan blade.
The rotation of 0 will create an air flow.

This airflow then flows from the intake hole 21 of the control circuit storage chamber 5 to the exhaust port 25 via the communication ports 22, 23, the center hole of the stator 6, the magnet rotor 10, and the ventilation port 24, and the control circuit of the storage chamber 5. At the same time, the stator 6 and the magnet rotor 10 are cooled.

In this way, the control circuit 7, stator 6, magnet rotor 1
0 is efficiently cooled by the air flow generated by the rotation of the magnet rotor 10, the control circuit 7 operates stably, and there is no possibility that the stator coil will generate abnormal heat.

Note that the grooves 14 formed in the magnet rotor 10 are not limited to those that intersect the axis of the rotor 10 as in the above embodiments, but may be radiated in a curved line as shown in FIG. 4, for example. Good too.

As detailed above, this invention has a ring-shaped stator attached, a control circuit storage chamber provided around the outer periphery, and a slave device that rotatably supports a magnetic rotor, which can be attached and detached. A plurality of grooves are provided radially outward from the center on the surface of the magnet rotor facing the stator, and a ventilation path communicating with the outside through the control circuit storage chamber and the center hole of the stator is formed.

Therefore, it is an object of the present invention to provide an electric device that can efficiently cool a control circuit, a stator, and a magnet rotor by having a magnet rotor function as a fan blade with a simple configuration.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of an embodiment of this invention, Fig. 2 is a plan view of the magnet rotor of the same embodiment, Fig. 3 is a cross-sectional view taken along the line III--III of Fig. 2, and Fig. 4. FIG. 2 is a plan view of a magnet rotor according to another embodiment of the invention. 1...Intimate (one mixer), 4...
Recess, 5... Control circuit storage chamber, 6...
Stator, 7...Control circuit, 8...Slave unit (mixer bottle), 10...Magnet rotor, 14...Groove, 21...・Intake port,
22, 23... Communication port, 24... Ventilation port, 25... Exhaust port.

Claims (1)

[Scope of utility model registration request] An annular stator having a recess in the center and a control circuit storage chamber around the outer periphery of the recess, an annular stator installed in the recess, and a stator detachably attached to the recess. a magnet rotor that is rotatably attached to the slave device and faces the end face of the stator when the slave device is attached intimately; An electric device comprising: a plurality of grooves provided radially outward; and a ventilation path communicating with the outside through the control circuit storage chamber and the center hole of the stator.