JPH029120Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is mainly used in general households, etc., and is equipped with a plurality of blades or a large number of blades, which are rotated around one axis. The present invention relates to a blower that creates a flow of gas, mainly air, by rotating it, and more specifically, to a blower that can obtain hot air as needed.

(Conventional technology) In addition to electric fans and ceiling fans, blowers that create gas flow by rotating blades include hair dryers, circulators, wind fans, room air conditioners, electric hot air fans, fan heaters, kotatsu with fans, etc. Used in many products.

By the way, the blower itself used in such products can only produce cold air; in order to obtain hot air, it is possible to obtain hot air using a blower, such as those found in hair dryers, electric hot air blowers, fan heaters, or kotatsus with fans. Typically, a heating element (heater) was provided in front of the blower, and the heating element was heated by blowing air generated by the blower onto the heating element.

However, in the above-mentioned type, the heat exchanger and the blower must be installed separately, so it inevitably lacks compactness, and the blower requires a large output due to the pressure loss of the heat exchanger, and it also consumes a lot of noise. Because of the disadvantage of requiring a large amount of electric power, it has been proposed to install a heater in the fan and use it as a direct heating element (see, for example, Japanese Utility Model Application Publication No. 142306/1983).

By the way, in the above-mentioned conventional example in which the fan is equipped with a heater and the heater is used as a direct heat generating element, in order to supply electricity to the heater from the motor assembly side, a slip ring provided on the boss of the fan is fixed to a holder on the motor assembly side. It adopted a structure in which the held brushes were pressed by a spring and brought into contact.

(Problem to be solved by the invention) In this conventional structure, the brush that is pressed by the slip ring is fixed to the motor assembly, so naturally, in order to generate cold air,
It is necessary to install a switch to cut off the power to the heater, but even if you turn off the switch and cut off the power to the heater, the slip ring and brush will remain in contact and the fan will rotate, so the slip ring and brush will There was a problem that the parts would wear out quickly.

In view of these conventional problems, the purpose of the present invention is to provide a blower that can cut off the contact between the slibbing ring and the plug by cutting off the power to the heater, thereby successfully preventing wear and tear on both. do.

(Means for Solving the Problems) In order to achieve the above object, in the blower of the present invention, resistors 6 are provided on the blades 3a, conductors 13, 14 is provided on the side surface of the boss 9 of the wing body 3a facing the motor assembly 2, and the plug 1 is connected to the brushes 15, 15 that are brought into contact with the conductors 13, 14 and the jacks 17, 17 that are provided on the motor assembly 2 side.
The conductors 13, 14 and the jacks 17, 17 can be electrically connected via a plug case 18 having
8 can be attached to and detached from the jack 17.

(Function) When obtaining hot air, insert the plugs 16, 16 into the jacks 17, 17, and connect the conductor 1.
If the plug case is interposed between the conductors 13, 14 and the jack with the brushes 15, 15 in contact with the jacks 17, 14 and the jacks are electrically connected, the blades 3a... When the resistor 6 is energized, Joule heat is generated. At this time, wing body 3
Since a... is rotating, heat is supplied to the introduced air due to rotation, and the thus warmed air is discharged to the front.

Also, when obtaining cold air, plug case 18
If you take it out of the jack, it will automatically turn into jack 1.
Since the electrical connection between the jacks 17, 17 and the conductors 13, 14 is cut off, even if electricity is applied, current is not passed from the jacks 17, 17 to the conductors 13, 14, and the wing body 3a
... simply introduces air from the back and discharges it straight to the front. Since the plug case 18 has been removed from the motor assembly 2, the conductor 1
The brushes 15 and 15 do not come into contact with the brushes 3 and 14.

In this way, by inserting and removing the plug case 18 into and from the jacks 17, 17, it is possible to switch between energizing and de-energizing the resistor 6, and in the de-energized state, the plugs 15, 15 can be smoothly contacted with the conductors 13, 14. It can be eliminated.

(Example) Next, an example of this invention will be described based on the drawings.

1 to 5 illustrate a case where the blower is applied to an electric fan as an example of an air blower, in which 1 is a pedestal, and 2 is a motor assembly, which is configured to be swingable with respect to the pedestal 1.

3 is a blower fan, 4 is a front cover, and 5 is a rear cover, and each member such as a base, a motor assembly, front and rear covers, etc., are provided almost as they are in a known electric fan.

Among such electric fans, the present invention has a feature in the blower fan, and the summary is that the blower fan 3 itself is a heating element, that is, a ceramic heater.

Specifically, the substrate of the wing body 3a is formed of ceramic, and the resistor 6 is printed on its surface in an appropriate pattern, and then an insulating protective layer 7 of, for example, alumina is coated on the substrate, and the fuser 3 and the resistor are formed. 6 and the alumina protective layer 7 are integrally sintered at high temperature at the same time. For example, the base material of the ceramic blades 3a is alumina ceramic. At both ends of the resistor 6 are electrodes 8,
8A... is provided and connected through a conductive material.
AC100V etc. is applied. Each wing body 3a... is a boss 9
is formed integrally with. In the figure, reference numeral 10 denotes a fastener for removably attaching the blower fan 3 to the rotary shaft 11 via its boss 9, and 12 denotes its operating tool, both of which employ known means.

Next, an example of a means for supplying electricity to the resistor 6 will be described. A conductor is connected over the entire length of the back surface of the cylindrical shaft 9a that holds the fastener 10 integrally formed in the center of the boss 9, and the periphery of the back surface of the boss. As an example, flat annular conductive rings 13 and 14 are fixedly connected. Furthermore, conductive pieces 13a are integrally provided from the inner ring 13 of the conductive rings in correspondence with one electrode 8 of the resistor 6 of each vane body 3a, and the respective free ends are The peripheral wall of the boss 9 is penetrated and protruded outward, and the one electrodes 18 are respectively connected thereto. Also, from the outer ring 14, the other electrode 8a
Conductive pieces 14a are integrally provided in correspondence with...,
The other electrodes 8a are respectively connected to these. These two conductive rings 13, 14 are as shown in the figure.
They are provided separately around the axis and around the periphery of the back surface of the boss 9 to prevent short circuits. Each conductive ring 13, 14 is connected to a jack 17, 17 provided within the motor assembly 2 via a brush 15, 15 and a plug 16, 16, respectively. The brushes 15, 15 and plugs 16, 16 are provided in a plug case 18 and are detachably attached to jacks 17, 17. Therefore, when energization is not required, the electrical connection between the power source and the resistor 6 can be cut off by removing the plug case 18. 1
9 is a jack case.

The pedestal 1 is also equipped with an electronic control unit 20 and a control panel 21 corresponding to the resistor 6.

The control panel 21 includes a swing setting knob for the motor assembly 2, a time control switch,
Known operating tools A such as an air volume adjustment switch are equipped, but operating tools B such as an air conditioning/heating switch and a heating temperature setting knob are located on the back of the stand 1a.
It is more preferable to arrange it on the left and right side surfaces or the rear side of the pedestal 1, or on the lower peripheral surface of the motor assembly 2, so as to prevent erroneous operation from occurring when operating the control panel during normal cold air supply. The electronic control unit 20 has a function of automatically controlling the air volume (rotation speed of the blower fan), the power applied to the resistor 6, etc. in accordance with the set heating temperature value etc. so as to maintain this set value.

Next, the operation of the structure of the above embodiment will be explained.

When using it as a regular electric fan, switch the heating/cooling switch to the cold side. At this time, if the plug case 18 is removed, the resistor 6 will not be energized even if there is an erroneous operation. To use it as a heater in winter, switch the heating/cooling switch to the hot air side and set the plug case 18 at the same time. When the power switch is turned on, the resistor 6 is connected via the electronic control unit, jack, plug, brush, and conductive rings 13 and 14.
AC100V voltage is applied to the unit, and the temperature is raised to the set heating temperature value. In this case, the wind temperature sensor (not shown)
The electronic control unit 20 calculates the air volume based on the detected amount, and automatically controls the motor assembly 2 so that the rotation speed corresponds to the air volume. By doing so, the heating temperature of the resistor 6 and the air volume are automatically controlled even if the room temperature etc. are different, and the set heating temperature value can always be obtained.

In the figure, 23 is an outer frame of the motor assembly 2, and 24 is a metal inner frame, which supports the rotating shaft 11, a motor (not shown), and the like. Reference numeral 25 denotes a fixture for the rear cover 5, which is a cylindrical part 24 integrally provided in the center of the inner frame 24.
Fit the screw into a. 26 is a bearing, 19a, 19a
is a mounting flange that extends integrally from the jack case 19 and is screwed to the inner frame 24. or,
Numeral 27 is a protrusion that integrally projects from the fastener 10 and is fitted into a groove 9b formed in the cylindrical shaft 9a of the boss 9 to prevent relative rotation between the boss 9 and the fastener 10.

(Effect of the invention) As can be understood from the description of the embodiments above, the blower according to the invention has two parts on the motor assembly side.
Connect the plug case 18 to the jacks 17, 17 provided on the
By inserting and removing the plugs 16, 16, the resistor 6
Needless to say, it is possible to easily switch between energizing and de-energizing the blades, making it possible to obtain a versatile blower. When using the blower simply, the plug case 18 is removed from the motor assembly 2. The brushes 15, 15 are not in contact with the conductors 13, 14 provided on the bosses 9 of the body 3a..., and both are worn out within a short period of time, resulting in poor contact between the two when used as a hot air fan. It is possible to provide a highly durable blower without any risk of damage.

Further, since the brushes 15, 15 and the plugs 16, 16 are integrally provided in the plug case 18, insertion and removal of the plugs 16, 16 into and from the jacks 17, 17 and contact of the brushes 15, 15 with the conductors 13, 14 are easy. You can easily perform two operations: brush 15,
15 and the plugs 16, 16 can be easily stored.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of the main part showing an example of the implementation of the present invention, Fig. 2 is an overall perspective view showing the case where the invention is applied to an electric fan, and Fig. 3 is a partially cutaway view of the main part. FIG. 4 is a sectional view of the main part, and FIG. 5 is an enlarged perspective view of the main part. Symbol explanation, 3...Blower fan, 3a...Blade body,
6...Resistor, 7...Insulating protective layer, 8, 8a...
Electrode, 9,9A...Blower fan boss, 13,1
4... Conductor, 13a, 14a... Conductive piece, 15
...Brush, 16...Plug, 17...Jack.

Claims (1)

[Scope of utility model registration request] A resistor 6 is provided in the wing body 3a, and conductors 13 and 14 for connecting the resistor 6 are provided on the side surface of the boss 9 of the wing body 3a that faces the motor assembly 2. Contact brush 1
5, 15 and plugs 16, 16 to be connected to jacks 17, 17 provided on the motor assembly 2 side.
3, 14 and jacks 17, 17 are electrically connectable, and the plug case 18 is detachably attached to the jack 17.