JP3532562B2 - Heater and electric fan - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fan that also serves as a heater that is used as a fan in the summer and used as a heater in the winter.

Background Art Fans are electrical appliances used only in the summer,
It is stored in the storage except during summer. On the other hand, the heater is an electric appliance that is used only in winter, and is stored in a storage cabinet except in winter. It is necessary to store and take out these electric appliances every time the season changes, and it is necessary to secure a large storage space. As a means for solving this problem, International Publication WO00 / 58669 discloses a heater / fan which can be used as a fan or a heater as required. The method of changing the state in which this electric fan that also serves as a heater is used as a fan from the state in which it can be used as a heater is as follows. First, the rotary blade and all of the front protective net and the rear protective net covering the rotary blade are removed from the motor case containing the fan motor. Next, a parabolic reflector formed in the same shape as the rear protection net is attached to the motor case. Next, the heating element unit is attached so that the rotary vane covers the removed motor shaft. When installing the heating element unit,
Connect the heating element to the power socket provided on the front of the motor case with an electric cord, store the electric cord with the motor shaft in the cavity inside the heating element unit, and fix the heating element to the motor case with screws. . As described above, the heater can be used as a heater that irradiates the heat ray from the heating element forward with the reflector. It should be noted that the operation panel is separately provided with an air flow rate adjusting switch for the fan and a heat quantity adjusting switch for the heater.

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a heater / fan which improves operability while facilitating the work for changing from a fan to a heater or changing the heater to a fan. .

The heater and fan of the present invention includes a stand, a motor case supported by the stand and containing a fan motor, a rear protective net attached to the motor case, and a boss portion formed in a front portion of the motor case. A motor shaft projecting from the fan motor to the front of the motor case through a through hole formed in the front surface of the boss; and a rotary blade detachably held by the motor shaft and covered behind by the rear protective net. A rear edge portion is detachably attached to a front edge portion of the rear protective net, and has a front protective net that covers the rotary vane from the front, and the boss portion is provided at an intermediate portion between the rear protective net and the rotary vane. A plurality of split reflectors extending in a petal shape in the radial direction of the boss portion to form a parabolic reflector as a whole The divided reflector is rotatably supported in the circumferential direction of the boss portion and is foldable in a state of being overlapped in the longitudinal direction of the boss portion, and with the rotary vane removed. A heating element can be attached to the front of the parabolic reflector, and a power socket connected to the heating element is provided in the stand.

Therefore, by expanding the petal-shaped split reflector to form a parabolic reflector in winter, it is possible to efficiently reflect the heat rays of the heating element and ensure heater performance, while in summer, the reflector is used. By simply folding the fan without removing it, it is possible to prevent the flow of wind by the rotating blades of the fan from being obstructed. There is no need to remove the rear protection net and replace it with a reflector, or store the removed reflector.

In the electric fan / heater of the present invention, instead of the front protection net, a heat insulating cover is provided in the center and a heat generating element holding net having a heat generating element can be attached behind the heat insulating cover. Therefore, the work of attaching the heating element can be completed simply by replacing the front protection net with the heating element holding net. Further, the work of connecting the heating element and the power socket can be completed after attaching the heating element holding net. Furthermore, the fan motor and heating element are isolated, and the interference between the heating element components and the motor shaft,
It becomes easy to take measures against the heat deterioration of the fan motor due to the conductive heat of the heating element.

In the fan combined with the heater according to the present invention, the heating element is formed in an annular shape, is disposed so as to be coaxial with the parabolic reflection plate, and has a tapered reflection surface that spreads backward in the inner ring portion. The tube is inserted. Therefore, since the heat rays emitted from the heating element are directed to the reflector through the reflector, the heater efficiency is improved, and the heat deterioration of the fan motor is ensured because it is shielded by the reflector and does not directly hit the motor shaft. To be prevented.

In the fan that also serves as the heater of the present invention, a reflective surface is provided on the rear surface of the heat insulating cover. Therefore, the heat ray toward the heat insulating cover is directed to the parabolic reflector,
The heater efficiency is further improved.

In the fan combined with the heater of the present invention, the heating element holding net is provided with a plurality of reinforcing metal fittings for connecting the rear edge portion and the heat insulating cover, while the rear protective cover is provided with the front edge portion and the motor case. Are provided so as to correspond to the reinforcing metal fittings of the heating element holding net, and the reinforcing metal fittings are fitted to each other at the joining portion of the rear edge portion and the front edge portion. It Therefore, the heating element attached to the heat insulating cover is stably supported.

In the heater / fan of the present invention, the heating element and the power source socket are connected by an electric cord, and the electric cord has heat resistance and is arranged along the heating element holding net. Therefore, the electric cord is not hooked by hand during the replacement work.

In the fan combined with the heater of the present invention, the operation switch provided on the stand can be selectively used for adjusting the air volume of the fan motor or the heat quantity of the heating element by the changeover switch of the fan and the heater. Therefore, operability in selecting a desired switch is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an assembly diagram of a heater / fan according to the present invention. FIG. 2 is a view showing a connecting portion between the reinforcing metal fitting of the rear protective net and the reinforcing metal fitting of the front protective net or the heating element holding net. FIG. 3 is a front view showing a state in which the parabolic reflector is formed by expanding the split reflector. FIG. 4 is a sectional view taken along the line AA of FIG. FIG. 5 is a front view showing a state in which the split reflector is folded. FIG. 6 is a sectional view taken along line BB in FIG. FIG. 7 is a diagram showing a relationship between two adjacent divided reflectors in a state where the parabolic reflector is formed. FIG. 8 is a wiring diagram showing a connection relationship between an operation switch for air volume adjustment or heat amount adjustment and a changeover switch.

BEST MODE FOR CARRYING OUT THE INVENTION In FIG. 1, reference numeral 1 denotes a stand, a base 11 for installing a fan on the floor, an operation switch 12 provided on the base 11 for adjusting the air volume of the fan, and a fan. Heater changeover switch 13 and base 1
It has a pole portion 14 extending upward from 1. Pole part 1
A cylindrical motor case 2 having a fan motor 2a incorporated therein is supported at the upper end of 4 to be swingable. Around the waist of the motor case 2, a rear protection net 3 formed in a parabolic shape by a plurality of crosspieces 3a extending from a mounting portion 35 to the motor case 2 to an annular front edge portion 36 is opened forward. Is attached to. In addition, a cylindrical boss portion 21 is provided on the front surface of the motor case 2.
Is formed, and a through hole 22 is formed in the center of the front surface. The motor shaft 23 of the fan motor 2a passes through the through hole 22 and projects forward. Rotating blades 31 of a fan are detachably held on the motor shaft 23. Motor shaft 2
A screw is formed at the tip of the blade 3, and the rotary blade 31 is held by tightening a bag-shaped nut 32 on the screw. In front of the rotary vane 31, a plurality of crosspieces 4 extending from the central ornament portion 42 to the annular trailing edge portion 46.
A front protection net 4 formed in a parabolic shape by a is provided. The front protection net 4 has a rear edge portion 46 superposed on the front edge portion 36 of the rear protection net 3 so as to cover the rotary vane 31 from the front side, and the rear protection net 3
On the other hand, a hook (not shown) is attached so that it can be easily attached and detached.

In addition to the crosspieces 3a of the rear protective net 3, four (plural) rod-shaped reinforcing metal fittings 34 that connect the mounting portion 35 to the motor case 2 and the front edge portion 36 are attached to the rear protective net 3. ing. Tip part 34a of the reinforcing metal fitting 34
Is formed as a hollow pipe. Further, four rod-shaped (a plurality of) reinforcing metal fittings 44 connecting the ornament portion 42 and the rear edge portion 46 are attached to the front protective net 4 at positions corresponding to the reinforcing metal fittings 34 of the rear protective net 3. There is. As shown in FIG. 2, the tip end portion 44a of the reinforcing metal fitting 44 is fitted to the opening of the tip end portion 34a of the reinforcing metal fitting 34 in a state where the rear protective net 3 and the front protective net 4 are overlapped with each other. The nets 3 and 4 are firmly connected to each other.

At the intermediate portion between the rear protective net 3 and the rotary vane 31, a petal-shaped extension is formed from the boss portion 21 in the radial direction of the boss portion 21,
As shown in FIGS. 3 and 4, a plurality of divided reflectors 24 forming a parabolic reflector as a whole are provided. Each of the split reflectors 24 is formed of a thin metal plate, and the front surface is a reflecting surface. A circular hole 24a is formed at one end of each of the split reflectors 24, and the boss portion 21 is pierced through the circular hole 24a so as to be rotatably supported in the circumferential direction of the boss portion 21. Therefore, as shown in FIGS. 5 and 6, it is possible to fold the boss portion 21 in a state of overlapping in the longitudinal direction. To form a parabolic reflector, each divided reflector 24 has
As shown in FIG. 7, a hook 24b for hooking another adjacent divided reflector 24 in an expanded state is provided. In addition, a clasp for connecting the two divided reflectors at both ends is separately set in order to maintain the parabolic shape.

In this electric fan which also serves as a heater, the heating element holding net 5 shown in FIG. 1 can be attached in place of the front protective net 4 in a state where the rotary blades 31 are removed.
The heating element holding net 5 is formed in a parabolic shape having the same shape as the front protection net 4 by the crosspiece 5a extending from the heat insulating cover 52 at the central portion to the annular rear edge portion 56, and heat is generated behind the heat insulating cover 52. It has a body 51. The heating element holding net 5 has the same heat insulating cover 5 as the front protection net 4.
A rod-shaped reinforcing metal fitting 54 that connects the rear end portion 56 and the rear edge portion 56 is attached. As shown in FIG. 2, the tip portion 54a of the reinforcing metal fitting 54 is configured to be fitted into the opening of the tip portion 34a of the reinforcing metal fitting 34, so that both nets 3 and 5 are firmly connected. It Therefore, the heating element 51 is stably supported by the motor case 2 via the reinforcing metal fittings 34 and 54.

In the heating element holding net 5, on the rear surface of the heat insulating cover 52, a reflecting cylinder 53 having a tapered reflecting surface 53a extending rearward is provided upright. It should be noted that the rear surface of the heat insulating cover 52 is provided with a reflecting surface 52a on a portion other than the portion where the reflecting cylinder 53 is installed. The heating element 51 is a generally used heating wire formed in an annular shape, and is held so as to surround the reflection surface 53 a of the reflection cylinder 53. The heating element 51 operates by being connected to the power socket 15 provided on the pole portion 14 of the stand 1.
Electric cord 5 for connecting the heating element 51 and the power socket 15
5 is heat resistant, and the reinforcing metal fitting 54 of the heating element holding net 5
It is arranged so that it crawls toward the rear edge portion 56 along one of the above. The electric cord 55 further extends from the rear edge portion 56 and has a plug 55a at the tip which is inserted into the power socket 15.
Is provided.

The operation switch 12 for adjusting the air flow rate of the fan motor 2a is a push button type, and four operation switches 12a to 12d are provided. Reference numeral 12a is a fan power-off switch, and 12b to 12c are fan power-on switches that can set the air volume to small, medium, and large, respectively. These operation switches 12 are connected to a fan / heater changeover switch 13, as shown in FIG. Therefore, by operating the changeover switch 13 toward the heater (in the direction of arrow C), it can be used as an operation switch for adjusting the amount of heat of the heating element 51. That is, 12a is a heater power off switch, and 12b
Reference numerals 12c to 12c are power-on switches that can set the heat quantity of the heater to small, medium, and large.

In the above-described heater / fan, the heating element holding net 5 having a heating element is attached instead of the front protection net 4, but the heating element may be attached to the front protection net 4.

INDUSTRIAL APPLICABILITY When the above-described heater / fan is used as a fan, the split reflector 24 is attached to the boss portion 21 as shown in FIG.
Folded in a state of overlapping in the longitudinal direction of the rotary blade 31,
The front protection net 4 is attached, and the changeover switch 13 is set to the fan side. By operating the operation switches 12b to 12d in this state, the rotary blade 31 rotates. Since the split reflector 24 is folded, the flow of the wind is not obstructed, and the function as a fan is exhibited.

When the above-described fan that also serves as a heater is used as a heater, the rotary blades 31 and the front protection net 4 are removed, and the split reflection plate 24 is expanded to form a parabolic reflection plate as shown in FIG. Attach 5,
The changeover switch 13 is on the heater side. By operating the operation switches 12b to 12d in this state, heat rays are emitted forward from the heating element 51 via the reflection plate, and the function as a heater is exhibited.

As described above, it is possible to provide a fan that also serves as a heater that can be easily handled by a user who is not used to disassembling and assembling electrical appliances.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F04D 25/08 307 F24C 7/06 F24C 15/22 F24H 3/04 302

Claims (7)

(57) [Claims] 1. A stand, a motor case supported by the stand and containing a fan motor, a rear protective net attached to the motor case, a boss portion formed at a front portion of the motor case, and the boss portion. A motor shaft protruding from the fan motor to the front of the motor case through a through hole formed in the front surface of the fan, a rotary blade detachably held by the motor shaft and covered with the rear protective net at the rear, and a trailing edge. A front protection net that is detachably attached to the front edge of the rear protection net and covers the rotary vane from the front, and the boss from the boss at the intermediate portion of the rear protection net and the rotary vane. It is equipped with a plurality of split reflectors that extend like petals in the radial direction of the part to form a parabolic reflector as a whole. The split reflector is rotatably supported in the circumferential direction of the boss portion and is foldable in a state of overlapping in the longitudinal direction of the boss portion. A heater / fan, wherein a heating element is attachable to the front, and a power socket connected to the heating element is provided in the stand. 2. A heating element holding net having a heating element provided at a central portion thereof and having a heating element at the center thereof, instead of the front protection net, is attachable to the heating element holding net. 1. A fan that also serves as a heater according to 1. 3. The heating element is formed in an annular shape, is disposed so as to be coaxial with the parabolic reflection plate, and a reflection cylinder having a tapered reflection surface extending rearward is inserted in the inner ring portion. The electric fan that also serves as the heater according to claim 2, wherein the electric fan is used as a heater. 4. The electric fan as a heater according to claim 3, wherein a reflective surface is provided on the rear surface of the heat insulating cover. 5. The heating element holding net is provided with a plurality of reinforcing metal fittings for connecting a rear edge portion and the heat insulating cover, while the rear protective cover is attached to the front edge portion and the motor case. Are provided so as to correspond to the reinforcing metal fittings of the heating element holding net, and the reinforcing metal fittings are fitted to each other at the mating portion of the rear edge portion and the front edge portion. The fan that also serves as a heater according to any one of claims 2 to 4, which is configured. 6. The heating element and the power socket are connected by an electric cord, and the electric cord has heat resistance,
The fan that also serves as a heater according to any one of claims 2 to 4, characterized in that it is laid along the heating element holding net. 7. An operation switch provided on the stand can be selectively used as an air flow amount adjustment of the fan motor or a heat amount adjustment of the heating element by a switch for switching between a fan and a heater. The electric fan that also serves as a heater according to any one of claims 1 to 4.