JPS63315864A - Hot air generating method and its device - Google Patents

Abstract

PURPOSE:To decrease the power consumption and prevent an excessive increasing of temperature by a method wherein a ceramic insulated electrical wire is utilized as a heating source also acting as a power generating means. CONSTITUTION:When a winding of an electric motor is energized by an external power supply, a rotor 2 is rotated and at the same time a stator 1 and the rotor 2 having a winding wound thereon may generate heat. As a fan 4 is rotated under a rotational force of the rotor 2, an air flow is generated and the air sucked through an air intake port S is passed through an opening 11 of a fixing plate 10, passes through a clearance between the stator 1 and the rotor 2 to cool the stator 1 and the rotor 2, the air itself is heated and then flowed out from a hot air discharging port 9 arranged at the bottom part of a main body 7' of a casing. An electric motor used for generating hot air has a ceramic insulation wire to windings 3 and 3' wound around the stator 1 and the rotor 2, so that if the temperature of the winding is increased, an insulation resistance is increased and an electric current flowing through the winding is automatically decreased, resulting in that the power consumption is decreased. At the same time it is possible to prevent an excessive increasing of temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a hot air generation method and an apparatus thereof.
Dryers and heaters that use warm air, such as clothes dryers,
It is effective when used in futon dryers, chemical or biological dryers, hot air heaters, hand dryers, hair dryers, dishwashers, electric kotatsus, electric stoves, etc.

Conventional technology Conventional hot air generation methods and hot air generation devices have separate air blowing means and heat generating parts, as seen in hair dryers, for example, and a fan is rotated by an electric motor to generate air. The air is passed through a heating element made of an electrical resistor such as a nichrome wire and converted into warm air through heat exchange.

There is also a system (Utility Model Application Publication No. 50-67532) in which warm air after cooling the motor using a motor cooling block is used to defrost the back window of an automobile.

Furthermore, recently developed ceramic insulated wires have high-temperature insulation properties.

The structure of this ceramic insulated wire is shown in FIGS. 3 to 5.

The wire shown in Figure 3 is called Fujithermo A (registered trademark), and is an unfired type that has both the characteristics of a ceramic insulated wire with excellent high-temperature insulation and the characteristics of a synthetic enamelled wire with excellent winding properties. Ceramic insulated wire.

When the wire is heat-treated at a high temperature after winding, the outermost film decomposes and disappears, and the inner insulating layer becomes a complete ceramic insulator.

Furthermore, by selecting the material of the conductor, the
Can be used in a temperature range of °C, the conductor materials include aluminum constantum, nickel plated copper, silver, nickel stainless steel clad copper, gold, platinum,
There are silver rhodium, etc.

The wire shown in FIG. 4 is called Fujithermo M (registered trademark), and is an unfired type ceramic insulated wire with excellent flexibility.

After winding, the wire is heat-treated at a relatively low temperature of 500 to 600°C, so that the insulator becomes completely ceramic, and the conductor material can be selected from nickel, stainless steel, nichrome, gold, platinum, and platinum rhodicium. In that case, it can be used for a long time at high temperatures of 600 to 800°C. The product shown in Figure 5 is called Fujithermo S (registered trademark) and is a complete ceramic insulator that has been fired at a high temperature, so no heat treatment is required when incorporating it into equipment. Nickel, nickel-clad copper, Inconel, alumel, chromel, etc. can be used as the conductor material, and can be used at a high temperature of usually 400 to 500°C.

Although the three types of ceramic insulated wires have been described above, these ceramic insulated wires have a characteristic that the wire resistance increases as the temperature rises.

C1 Problems to be Solved by the Invention However, conventional hot air generation methods and hot air generation devices require a heat source such as an electric heater separate from the air blowing means, resulting in a large number of parts and high costs. There were problems such as the problem that the device itself could not be made compact.

In addition, a motor cooling block that cools the motor and then uses warm air for defrosting effectively utilizes the heat loss that inevitably occurs in the motor used as a power source for defrosting. However, conventional electric motors are not intended to generate heat, and it is desirable to reduce heat loss as much as possible. Therefore, it is not possible to generate such high heat with the heat generated by the loss of the electric motor, and
If an attempt is made to increase the temperature of the hot air generated by reducing the amount of air used to cool the motor, there is a problem with conventional motors in that the windings will burn due to the temperature rise, resulting in damage to the motor itself.

Furthermore, although ceramic-insulated electric wires can be used in fields that require high-temperature resistance, there has been no attempt to actively utilize them in hot air generation methods or hot air generation devices.

The present invention focuses on the recently developed ceramic insulated wire and utilizes the ceramic insulated wire as a heat source that also serves as a power generation means, thereby solving the problems of the conventional technology and solving the problems that the ceramic insulated wire has. The purpose is to effectively utilize these characteristics to generate warm air.

20. Means for Solving the Problems The present invention has the following configuration in order to solve the above problems.

In other words, in the hot air generation method of the first invention, by using ceramic insulated wires as the windings of a motor consisting of a stator and a rotor, the stator (
and/or rotor), the rotational force of the rotor turns a fan to generate airflow, and the airflow cools the heat generated in the stator (and/or rotor). At the same time, warm air is generated.

A hot air generator according to a second aspect of the invention includes a motor including a stator and a rotor using ceramic insulated wires as windings, and a motor attached to a shaft of the rotor and the stator (and/or rotor). This device generates hot air, and includes a fan that generates an air flow for cooling the air, and a casing that covers the electric motor and the fan and includes an air intake port and a hot air discharge port.

E, Example Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention.

The electric motor used for generating hot air according to the present invention is a heat-generating electric motor that mainly uses heat generated by the electric motor rather than rotational torque. The above-mentioned ceramic insulated wire is used.

The core material of the stator 1 and rotor 2 around which the windings are wound is silicon-clad plates in order to minimize heat loss due to hysteresis loss and eddy current loss in ordinary electric motors. Ordinary iron plates are used as the core material to increase heat generation.

In addition, the heat-generating motor of the present invention has ceramic insulated wire that is thicker than normal motor windings and is wound less than the normal number of turns, and the emphasis is placed on the heat generated by the motor rather than the rotational force of the motor. Suitable for generating warm air.

Furthermore, since this heating motor uses ceramic insulated wire as the winding, as the temperature of the winding increases, the insulation resistance increases and the current flowing through the winding is automatically reduced, reducing power consumption. At the same time, it is possible to prevent the temperature from rising excessively.

A shaft 5 of the rotor 2 is rotatably supported by a bearing 6,6', and a fan 4 is attached to the tip of the shaft 5.

As the fan 4, various types of fans such as a multi-blade fan, radial fan, backward-facing fan, etc. can be used depending on the usage conditions, but in this embodiment, an air intake port 8 is provided in the center to send airflow in one radial direction. I used the type.

The casing 7 that covers the electric motor and the fan 4 consists of a casing body 7' and a casing lid 7'', with an air intake port 8 opened in the center of the casing lid 7'' and an air intake port 8 in the bottom of the casing body 7'. The hot air outlet 9 is open.

A stator l of the electric motor is attached to the casing body 7', and a mounting plate 10 having a plurality of large fan-shaped openings 11 is attached to the upper part of the casing body 7'.

In this installation, a rectifying plate 12 and a bearing 6' are attached to the plate 10, and the bearing 6 is attached to the bottom of the casing body 7'.

These bearings 6,6' rotatably support the rotor 2 via the shaft 5.

In the embodiment shown in FIG. 1, the electric motor 41! has windings on the stator and rotor. (e.g. commutator motor)
However, it is not necessarily necessary to stick to this type of motor; it may be a type of motor that does not have a winding on the rotor side, such as a cage induction motor, or a motor with a permanent magnet rotating on the stator side. It may also be a type of motor that has a winding on the slave side.

In addition, in order to efficiently cool the stator or rotor around which the windings are wound, gaps or passages are provided in the core material around the stator or rotor windings to improve air flow. put.

In addition, in the embodiment shown in FIG. 1, the hot air outlet is provided at the bottom of the casing body 7', but it is not necessarily necessary to stick to this. It may be provided on the side of the

Next, the operation of the present invention will be described based on this example.

When the windings of the motor are energized by an external power source, the rotor 2 rotates and the stator 1 and rotor 2 around which the windings are wound generate heat.

When the fan 4 is rotated by the rotational force of the rotor 2, an air flow is generated, and the air taken in from the air intake port 8 passes through the opening 11 of the temporary IO as shown by the arrow in FIG. The stator 1 and the rotor 2 are cooled through the gap between the stator 1 and the rotor 2, and the air itself is heated and cools down to the casing body 7'.
The hot air flows out from the hot air outlet 9 provided at the bottom of the hot air.

FIG. 2 is a diagram showing a second embodiment of the present invention.

In this embodiment, an air intake port 8 is provided on the motor side of the casing 7, and a hot air discharge port is provided on the fan side of the casing 7. A multi-blade fan of the type that sends energy is used.

Other ceramic insulated wires for stator 1 and rotor 2
This embodiment is similar to the first embodiment in that the winding 3.3' is used as the winding 3.3' and that the shaft 5 of the rotor 2 is rotatably supported on the casing 7 via a bearing 6.6'.

In this embodiment, the stator and the trochanter are cooled using the airflow sucked in by the fan 4 to generate warm air.

Although the present invention has been described above using the first embodiment and the second embodiment, the present invention can be applied based on the technical idea of the present invention without being limited to these embodiments.

EFFECTS OF THE INVENTION The present invention utilizes a ceramic-insulated RN wire as a heat source that also serves as a power generating means, so that the conventional heat generating means and air blowing means, which were separate, can now be replaced with one, reducing the number of parts. Therefore, costs can be reduced and the device can be made more compact.

In addition, in the present invention, since ceramic insulated wires are used as the windings of the electric motor, even if the electric motor actively generates heat, the windings will not burn like in conventional motors. As the temperature of the winding increases, the wire resistance increases and the current flowing through the winding is automatically reduced, reducing power consumption and preventing excessive temperature rise.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing the first embodiment of the present invention, and FIG.
The figure is a partially sectional front view showing the second embodiment of the present invention, and the third figure is a partially sectional front view showing the second embodiment of the present invention.
5 to 5 are diagrams showing the structure of a ceramic insulated wire. 1... Stator, 2... Rotor, 3... Stator winding, 3... Rotor winding, 4... Fan, 5... Rotor shaft, 6.6 '...Bearing, 7...Casing, 7
′...Casing body, 7″...Casing lid body,
8... Air intake port, 9... Warm air discharge port, 10...
Mounting plate, 11...opening, I2...straightening plate, Fig. 1

Claims (3)

[Claims] (1) By using ceramic insulated wires as the windings of a motor consisting of a stator and a rotor, a large amount of heat is generated in the stator (and/or rotor) along with the rotational force of the rotor, and the rotor A hot air generation method in which a fan is rotated by the rotational force of the fan to generate an airflow, and the airflow cools the heat generated in the stator (and/or rotor) and generates hot air. (2) An electric motor consisting of a stator and a rotor using ceramic insulated wires as windings, and an airflow that is attached to the shaft of the rotor to cool the stator (and/or rotor). A hot air generating device comprising a fan, and a casing that covers the electric motor and the fan and includes an air intake port and a hot air discharge port. (3) The hot air generator according to claim 2, wherein an ordinary iron plate is used as the core material of the stator (and/or rotor).