WO2000058669A2 - Combined electric fan and radiation heater - Google Patents

Combined electric fan and radiation heater Download PDF

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Publication number
WO2000058669A2
WO2000058669A2 PCT/KR2000/000276 KR0000276W WO0058669A2 WO 2000058669 A2 WO2000058669 A2 WO 2000058669A2 KR 0000276 W KR0000276 W KR 0000276W WO 0058669 A2 WO0058669 A2 WO 0058669A2
Authority
WO
WIPO (PCT)
Prior art keywords
heater
fan
electric
safety net
motor case
Prior art date
Application number
PCT/KR2000/000276
Other languages
French (fr)
Other versions
WO2000058669A3 (en
Inventor
Man Won Kim
Original Assignee
Man Won Kim
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Man Won Kim filed Critical Man Won Kim
Priority to AU34630/00A priority Critical patent/AU3463000A/en
Priority to US09/701,293 priority patent/US6324340B1/en
Priority to JP2000608122A priority patent/JP3451435B2/en
Publication of WO2000058669A2 publication Critical patent/WO2000058669A2/en
Publication of WO2000058669A3 publication Critical patent/WO2000058669A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • F24C7/062—Arrangement or mounting of electric heating elements on stoves
    • F24C7/065—Arrangement or mounting of electric heating elements on stoves with reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/0001—Control or safety arrangements for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0411—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between for domestic or space-heating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/34—Heater, e.g. gas burner, electric air heater

Definitions

  • the present invention relates, in general, to electric equipment and, more particularly, to a combined electric fan and radiation heater designed to be selectively used as an electric fan in summer and as an electric radiation heater in winter.
  • Conventional electric fans are seasonal equipment only used in summer, and so they are necessarily stored out of season while consuming space and being inconvenient to users. Such a problem is also experienced in conventional electric heaters, or the seasonal equipment only used in winter.
  • w hich is selectively usable as an electric fan in summ er and as an electric heater in winter and is thus not necessary to be stored out of season.
  • an object of the present invention is to provide a combined electric heater and fan, which is designed to be selectively used as an electric fan in summer and as an electric radiation heater in winter w hile substituting both a blade unit and a rear safety net of the fan with a heat radiating body and a parabolic reflector of the heater.
  • the present invention provides a com bined electric fan and radiation heater, comprising a fan m otor set in a m otor case, a parabolic rear safety net, a blade unit, and a parabolic front safety net, further comprising a parabolic reflector designed to be detachably attached to the front end surface of the motor case using a nut while replacing the rear safety net, and a heat radiating body externally wound with a heating coil and designed to be detachably held on a seat of the parabolic reflector prior to being attached to the front end surface of the m otor case using a plurality of locking screw s while replacing the blade unit, with the heating coil being operated in conjunction with an existing electric circuit.
  • the combined fan and heater is used as an electric radiation heater, the heater accomplishes a desired radiation heating effect, allowing strong heat to effectively reach an area considerably rem ote from the heater, due to the parabolic reflector.
  • Fig. 1 is a partially exploded perspective view , show ing the construction of a combined fan and heater in accordance w ith the preferred em bodiment of the present invention
  • Fig. 2 is a sectional view , showing the construction of the combined fan and heater of this invention when it is used as an electric fan
  • Fig. 3 is a sectional view , show ing the construction of the com bined fan and heater of this invention when it is used as an electric radiation heater
  • Fig. 4 is a diagram of an electric circuit for the com bined fan and heater of this invention.
  • Fig. 1 is a partially exploded perspective view , showing the construction of a combined fan and heater in accordance w ith the preferred em bodiment of this invention.
  • Fig. 2 is a sectional view , showing the construction of the combined fan and heater w hen it is used as an electric fan.
  • Fig. 3 is a sectional view, showing the construction of the combined fan and heater when it is used as an electric radiation heater.
  • Fig. 4 is a diagram of an electric circuit for the combined fan and heater.
  • the combined fan and heater of this invention comprises a motor case 10, an externally-threaded boss 1 1 form ed at the front center of the motor case 10.
  • a parabolic rear safety net 20 is detachably held on the boss 11 using an annular nut tightened on the boss 1 1.
  • a motor shaft 30 projects forw ard from a m otor M , set within the interior of the motor case 10, through the center of the boss 1 1.
  • a blade unit 40 is detachably held on the motor shaft 30 using a knob nut tightened on the externally-threaded end portion of the motor shaft 30.
  • a parabolic front safety net 50 is assem bled w ith the rear safety net 20 at their edges so as to form a safety net assembly incasing the blade unit 40.
  • the above-mentioned construction of the combined fan and heater rem ains the same as that of a conventional electric fan.
  • the combined fan and heater is also provided w ith a parabolic reflector 60, w hich is designed to be detachably attached to the front end surface of the motor case 10 using a nut while replacing the rear safety net 20.
  • the combined fan and heater further comprises a heat radiating body 70.
  • This heat radiating body 70 is externally wound w ith a heating coil 71 and is designed to be detachably held on a seat 61 of the parabolic reflector 60 and to be attached to the front end surface of the m otor case 10 using a plurality of locking screw s w hile replacing the blade unit 40.
  • the heating coil 71 is operated in conjunction with an existing electric circuit.
  • the combined fan and heater of this invention is thus selectively usable as an electric fan and an electric radiation heater.
  • the rear safety net 20 is held on the externally-threaded boss 1 1 form ed at the front center of the motor case 10, using the annular nut as shown in Fig. 2.
  • the blade unit 40 is held on the motor shaft 30, projecting forw ard from the motor M within the motor case 10 through the center of the boss 1 1 , using the knob nut.
  • the front safety net 50 is assembled w ith the rear safety net 20 at their edges, thus forming a safety net assembly incasing the blade unit 40.
  • the shape and size of the parabolic reflector 60 are sim ilar to those of the rear safety net 20 as best seen in Fig. 1 , and so the parabolic reflector 60 is easily attached to the front end surface of the motor case 10 using the nut w hile replacing the rear safety net 20.
  • the front edge of the motor case 10 and the seat 61 of the parabolic reflector 60 are individually provided with a plurality of screw holes, thus allowing the heat radiating body 70 to be attached to the front end surface of the m otor case 10 using a plurality of locking screw s.
  • the seat 61 of the reflector 60 is provided with a central opening for allow ing the boss 1 1 to pass through.
  • the heat radiating body 70 is m ade of a ceram ic m aterial and has a double-headed drum shape. This heat radiating body 70 is provided w ith a plurality of screw holes on its end surface opposed to the front end surface of the motor case 10.
  • the heating coil 71 is regularly w ound around the inclined external surface of the heat radiating body 70 at a portion opposite to the end surface having the screw holes. Therefore, the heating coil 71 emits heat to the parabolic reflector 60.
  • the end of the above heating coil 71 extends to the outside of the end surface of the heat radiating body 70 having the screw holes, and is connected to a connector 72.
  • This connector 72 is detachably coupled to another connector 73, set on the front end surface of the m otor case 10, thus supplying electricity to the heating coil.
  • the fan is appropriately operated by m anipulating desired function sw itches provided on the top surface of the base 80.
  • the above base 80 is provided w ith a tim er T, a stop switch S W l and a plurality of w ind force control switches SW 2, SW 3 and SW 4, thus allow ing a user to easily and conveniently operate the fan.
  • the front safety net 50, the blade unit 40 and the rear safety net 20 are orderly removed from the motor case 10. Thereafter, the parabolic reflector 60 in place of the rear safety net 20 is mounted to the front end surface of the motor case 10 using a nut.
  • the heat radiating body 70 in place of the blade unit 40 is stably seated in the seat 61 of the reflector 60, with the connector 72 of the heating coil 71 being coupled to the other connector 73 of the motor case 10. Thereafter, the heat radiating body 70 is firm ly mounted to the front end surface of the m otor case 10 using a plurality of locking screw s passing through the screw holes of said body 70.
  • the front safety net 50 is assembled with the parabolic reflector 60 at their edges, thus forming a safety cover assembly for the heat radiating body 70.
  • the heater is appropriately operated by m anipulating the timer T, the stop switch SW 1 and a plurality of heat control sw itches H 1 and H2 provided on the top surface of the base 80.
  • a safety switch SW 5 is connected to the timer T in series.
  • both the fan motor M and the heating coil 71 are designed to be electrically activated under the control of a switch unit, w hich consists of the heat control switches H I and H2, the stop switch SW 1 and the wind force control switches SW 2, SW 3 and SW 4.
  • the fan motor M is activated w hile being controlled in its rotating speed in a three-step control mode, performed by the three wind force control sw itches SW 2, SW 3 and SW 4.
  • the heater part of the circuit is completely free from an operation due to a sw itching operation of the sw itch unit.
  • the heating coil 71 in place of the fan motor M is electrically activated in response to an operation of either heat control sw itch H I or H2.
  • the heating coil 71 of the heat radiating body 70 thus emits heat to the parabolic reflector 60.
  • the reference character SW 6 denotes a sw ivel select sw itch used for allow ing the head assembly of the combined fan and heater to sw ivel in opposite directions within a predetermined angle.
  • the reference characters P and F denote an overheat sensor and a fuse. In the above electric circuit, the fuse F, the safety switch SW 5, the time T and the stop switch SW 1 are designed to be operable in both the fan m ode and the heater mode.
  • the combined electric heater and fan of this invention is designed to be selectively used as an electric fan or as an electric radiation heater as desired w hile easily and simply replacing some parts of the fan with counterparts of the heater.
  • a parabolic reflector having a shape similar to a conventional parabolic antenna, is attached to the motor case. It is thus possible to effectively concentrate heat from the heating coil of a heat radiating body, installed at the center of the parabolic reflector, within a range having a heat reflection angle of about 50° w ithout unnecessarily dispersing heat.
  • the heater accomplishes a desired radiation heating effect, w hich allow s strong heat to effectively reach an area considerably remote from the heater.
  • the combined fan and heater of this invention is thus effectively and selectively used as an electric fan in summer and as an electric radiation heater in winter. That is, the combined fan and heater of this invention is four-season equipm ent, w hich is not necessary to be stored out of season, but is effectively usable all through the year. Particularly when the combined fan and heater is used as an electric radiation heater, the heater accomplishes a desired radiation heating effect, allow ing strong heat to effectively reach an area considerably remote from the heater, due to a parabolic reflector. A desirably improved heating effect is thus accomplished.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A combined electric fan and radiation heater, selectively used as an electric fan in summer and as an electric radiation heater in winter, is disclosed. The combined fan and heater of this invention consists of a fan motor set in a motor case, a parabolic rear safety net, a blade unit, and a parabolic front safety net in the same manner as a conventional electric fan. The combined fan and heater is also provided with a parabolic reflector and a heat radiating body. The parabolic reflector is designed to be detachably attached to the front end surface of the motor case using a nut while replacing the rear safety net. The heat radiating body is externally wound with a heating coil and is designed to be detachably held on a seat of the parabolic reflector prior to being attached to the front end surface of the motor case using a plurality of locking screws while replacing the blade unit, with the heating coil being operated in conjunction with an existing electric circuit. When the combined fan and heater is used as an electric radiation heater, the heater accomplishes a desired radiation heating effect, allowing strong heat to effectively reach an area considerably remote from the heater, due to the parabolic reflector.

Description

C OM B INED ELEC TRIC FAN AND RAD IATION HEATER
Technical Field
The present invention relates, in general, to electric equipment and, more particularly, to a combined electric fan and radiation heater designed to be selectively used as an electric fan in summer and as an electric radiation heater in winter.
B ackground Art
Conventional electric fans are seasonal equipment only used in summer, and so they are necessarily stored out of season while consuming space and being inconvenient to users. Such a problem is also experienced in conventional electric heaters, or the seasonal equipment only used in winter.
Therefore, it is desired to propose a combined electric fan and radiation heater, w hich is selectively usable as an electric fan in summ er and as an electric heater in winter and is thus not necessary to be stored out of season.
Disclosure of the Invention
Accordingly, the present invention has been made keeping in mind the above problem s occurring in the prior art, and an object of the present invention is to provide a combined electric heater and fan, which is designed to be selectively used as an electric fan in summer and as an electric radiation heater in winter w hile substituting both a blade unit and a rear safety net of the fan with a heat radiating body and a parabolic reflector of the heater.
In order to accomplish the above object, the present invention provides a com bined electric fan and radiation heater, comprising a fan m otor set in a m otor case, a parabolic rear safety net, a blade unit, and a parabolic front safety net, further comprising a parabolic reflector designed to be detachably attached to the front end surface of the motor case using a nut while replacing the rear safety net, and a heat radiating body externally wound with a heating coil and designed to be detachably held on a seat of the parabolic reflector prior to being attached to the front end surface of the m otor case using a plurality of locking screw s while replacing the blade unit, with the heating coil being operated in conjunction with an existing electric circuit.
W hen the combined fan and heater is used as an electric radiation heater, the heater accomplishes a desired radiation heating effect, allowing strong heat to effectively reach an area considerably rem ote from the heater, due to the parabolic reflector.
Brief Description of the Drawings
The above and other objects, features and other advantages of the present invention will be m ore clearly understood from the follow ing detailed description taken in conjunction w ith the accompanying drawings, in w hich: Fig. 1 is a partially exploded perspective view , show ing the construction of a combined fan and heater in accordance w ith the preferred em bodiment of the present invention;
Fig. 2 is a sectional view , showing the construction of the combined fan and heater of this invention when it is used as an electric fan; Fig. 3 is a sectional view , show ing the construction of the com bined fan and heater of this invention when it is used as an electric radiation heater; and
Fig. 4 is a diagram of an electric circuit for the com bined fan and heater of this invention.
B est M ode for C arrying O ut the Invention
Fig. 1 is a partially exploded perspective view , showing the construction of a combined fan and heater in accordance w ith the preferred em bodiment of this invention. Fig. 2 is a sectional view , showing the construction of the combined fan and heater w hen it is used as an electric fan. Fig. 3 is a sectional view, showing the construction of the combined fan and heater when it is used as an electric radiation heater. Fig. 4 is a diagram of an electric circuit for the combined fan and heater. As shown in Fig. 1 , the combined fan and heater of this invention comprises a motor case 10, an externally-threaded boss 1 1 form ed at the front center of the motor case 10. A parabolic rear safety net 20 is detachably held on the boss 11 using an annular nut tightened on the boss 1 1. A motor shaft 30 projects forw ard from a m otor M , set within the interior of the motor case 10, through the center of the boss 1 1. A blade unit 40 is detachably held on the motor shaft 30 using a knob nut tightened on the externally-threaded end portion of the motor shaft 30. A parabolic front safety net 50 is assem bled w ith the rear safety net 20 at their edges so as to form a safety net assembly incasing the blade unit 40. The above-mentioned construction of the combined fan and heater rem ains the same as that of a conventional electric fan. The combined fan and heater is also provided w ith a parabolic reflector 60, w hich is designed to be detachably attached to the front end surface of the motor case 10 using a nut while replacing the rear safety net 20. The combined fan and heater further comprises a heat radiating body 70. This heat radiating body 70 is externally wound w ith a heating coil 71 and is designed to be detachably held on a seat 61 of the parabolic reflector 60 and to be attached to the front end surface of the m otor case 10 using a plurality of locking screw s w hile replacing the blade unit 40. In such a case, the heating coil 71 is operated in conjunction with an existing electric circuit. The combined fan and heater of this invention is thus selectively usable as an electric fan and an electric radiation heater.
W hen it is desired to use the combined fan and heater as an electric fan, the rear safety net 20 is held on the externally-threaded boss 1 1 form ed at the front center of the motor case 10, using the annular nut as shown in Fig. 2. In addition, the blade unit 40 is held on the motor shaft 30, projecting forw ard from the motor M within the motor case 10 through the center of the boss 1 1 , using the knob nut.
Thereafter, the front safety net 50 is assembled w ith the rear safety net 20 at their edges, thus forming a safety net assembly incasing the blade unit 40.
The shape and size of the parabolic reflector 60 are sim ilar to those of the rear safety net 20 as best seen in Fig. 1 , and so the parabolic reflector 60 is easily attached to the front end surface of the motor case 10 using the nut w hile replacing the rear safety net 20. In the present invention, it is preferable to design the parabolic reflector 60 in a w ay such that the reflector 60 is able to concentratively reflect heat from the heat radiating body 70 in a desired direction, thus allowing strong heat to effectively reach an area considerably remote from the heater even though the heat reflecting angle of the reflector 60 is somew hat limited. On the other hand, the front edge of the motor case 10 and the seat 61 of the parabolic reflector 60 are individually provided with a plurality of screw holes, thus allowing the heat radiating body 70 to be attached to the front end surface of the m otor case 10 using a plurality of locking screw s. The seat 61 of the reflector 60 is provided with a central opening for allow ing the boss 1 1 to pass through. The heat radiating body 70 is m ade of a ceram ic m aterial and has a double-headed drum shape. This heat radiating body 70 is provided w ith a plurality of screw holes on its end surface opposed to the front end surface of the motor case 10. The heating coil 71 is regularly w ound around the inclined external surface of the heat radiating body 70 at a portion opposite to the end surface having the screw holes. Therefore, the heating coil 71 emits heat to the parabolic reflector 60. The end of the above heating coil 71 extends to the outside of the end surface of the heat radiating body 70 having the screw holes, and is connected to a connector 72. This connector 72 is detachably coupled to another connector 73, set on the front end surface of the m otor case 10, thus supplying electricity to the heating coil.
W hen it is desired to use the com bined fan and heater as an electric fan, all the desired parts of the fan are firm ly attached to the motor case 10 as described above in conjunction with Fig. 2. After assembling the parts of the fan with the motor case 10, the fan is appropriately operated by m anipulating desired function sw itches provided on the top surface of the base 80. As shown in Fig. 1 , the above base 80 is provided w ith a tim er T, a stop switch S W l and a plurality of w ind force control switches SW 2, SW 3 and SW 4, thus allow ing a user to easily and conveniently operate the fan.
On the other hand, w hen it is desired to use the combined fan and heater as an electric radiation heater, the front safety net 50, the blade unit 40 and the rear safety net 20 are orderly removed from the motor case 10. Thereafter, the parabolic reflector 60 in place of the rear safety net 20 is mounted to the front end surface of the motor case 10 using a nut. The heat radiating body 70 in place of the blade unit 40 is stably seated in the seat 61 of the reflector 60, with the connector 72 of the heating coil 71 being coupled to the other connector 73 of the motor case 10. Thereafter, the heat radiating body 70 is firm ly mounted to the front end surface of the m otor case 10 using a plurality of locking screw s passing through the screw holes of said body 70. The front safety net 50 is assembled with the parabolic reflector 60 at their edges, thus forming a safety cover assembly for the heat radiating body 70. After the desired parts of the heater are completely assembled w ith the motor case 10, the heater is appropriately operated by m anipulating the timer T, the stop switch SW 1 and a plurality of heat control sw itches H 1 and H2 provided on the top surface of the base 80.
The operational effect of the combined fan and heater of this invention w ill be described herein below in conjunction w ith the circuit diagram of Fig. 4.
As shown in the drawing, a safety switch SW 5 is connected to the timer T in series. On the other hand, both the fan motor M and the heating coil 71 are designed to be electrically activated under the control of a switch unit, w hich consists of the heat control switches H I and H2, the stop switch SW 1 and the wind force control switches SW 2, SW 3 and SW 4.
W hen the combined fan and heater is used as an electric fan, the fan motor M is activated w hile being controlled in its rotating speed in a three-step control mode, performed by the three wind force control sw itches SW 2, SW 3 and SW 4. In such a case, the heater part of the circuit is completely free from an operation due to a sw itching operation of the sw itch unit.
On the other hand, w hen the com bined fan and heater is used as an electric radiation heater, the heating coil 71 in place of the fan motor M is electrically activated in response to an operation of either heat control sw itch H I or H2. The heating coil 71 of the heat radiating body 70 thus emits heat to the parabolic reflector 60. In Fig. 4, the reference character SW 6 denotes a sw ivel select sw itch used for allow ing the head assembly of the combined fan and heater to sw ivel in opposite directions within a predetermined angle. On the other hand, the reference characters P and F denote an overheat sensor and a fuse. In the above electric circuit, the fuse F, the safety switch SW 5, the time T and the stop switch SW 1 are designed to be operable in both the fan m ode and the heater mode.
Industrial Applicability
As described above, the combined electric heater and fan of this invention is designed to be selectively used as an electric fan or as an electric radiation heater as desired w hile easily and simply replacing some parts of the fan with counterparts of the heater. Particularly when the combined electric heater and fan of this invention is used as an electric radiation heater, a parabolic reflector, having a shape similar to a conventional parabolic antenna, is attached to the motor case. It is thus possible to effectively concentrate heat from the heating coil of a heat radiating body, installed at the center of the parabolic reflector, within a range having a heat reflection angle of about 50° w ithout unnecessarily dispersing heat.
D ue to such a parabolic reflector, the heater accomplishes a desired radiation heating effect, w hich allow s strong heat to effectively reach an area considerably remote from the heater.
The combined fan and heater of this invention is thus effectively and selectively used as an electric fan in summer and as an electric radiation heater in winter. That is, the combined fan and heater of this invention is four-season equipm ent, w hich is not necessary to be stored out of season, but is effectively usable all through the year. Particularly when the combined fan and heater is used as an electric radiation heater, the heater accomplishes a desired radiation heating effect, allow ing strong heat to effectively reach an area considerably remote from the heater, due to a parabolic reflector. A desirably improved heating effect is thus accomplished.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art w ill appreciate that various m odifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claim s.

Claims

Claims:
1. In an electric fan, comprising a motor case, an externally-threaded boss formed at a front center of said motor case, a parabolic rear safety net detachably held on said boss using an annular nut tightened on said boss, a motor shaft projecting forw ard from a fan m otor w ithin the motor case through the center of said boss, a blade unit detachably held on the m otor shaft using a knob nut tightened on said motor shaft, and a parabolic front safety net assembled with the rear safety net at their edges so as to form a safety net assembly covering the blade unit, the improvement comprising: a parabolic reflector designed to be detachably attached to a front end surface of said motor case using a nut while replacing the rear safety net; and a heat radiating body externally wound w ith a heating coil and designed to be detachably held on a seat of said parabolic reflector prior to being attached to the front end surface of the motor case using a plurality of locking screw s while replacing the blade unit, w ith the heating coil being operated in conjunction with an existing electric circuit of the fan, w hereby the electric fan is selectively usable as an electric radiation heater as desired.
PCT/KR2000/000276 1999-03-29 2000-03-29 Combined electric fan and radiation heater WO2000058669A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU34630/00A AU3463000A (en) 1999-03-29 2000-03-29 Combined electric fan and radiation heater
US09/701,293 US6324340B1 (en) 2000-03-29 2000-03-29 Combined electric fan and radiation heater
JP2000608122A JP3451435B2 (en) 1999-03-29 2000-03-29 Electric heater combined with electric heater

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR199910759 1999-03-29
KR19990010759 1999-03-29

Publications (2)

Publication Number Publication Date
WO2000058669A2 true WO2000058669A2 (en) 2000-10-05
WO2000058669A3 WO2000058669A3 (en) 2001-03-01

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JP (1) JP3451435B2 (en)
CN (1) CN1310793A (en)
AU (1) AU3463000A (en)
WO (1) WO2000058669A2 (en)

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Publication number Priority date Publication date Assignee Title
CN102032219A (en) * 2011-01-07 2011-04-27 佛山市富士宝电器科技股份有限公司 Fan mesh enclosure
US8951024B2 (en) 2009-06-04 2015-02-10 Sharp Kabushiki Kaisha Air blower
CN105065310A (en) * 2015-08-07 2015-11-18 无锡市悦丰化工有限公司 Electric fan made from stable material
WO2016127454A1 (en) * 2015-02-11 2016-08-18 许文龙 Multipurpose fan
CN113847665A (en) * 2021-11-02 2021-12-28 嘉兴学院 Reflective radiation cooling system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102213223A (en) * 2010-04-01 2011-10-12 卢昌 Electric apparatus with electric fan and electric heater

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JPS62204240U (en) * 1986-06-16 1987-12-26
JPH01139931A (en) * 1987-11-26 1989-06-01 Sanyo Electric Co Ltd Electric stove also acting as electric fan
JPH01277166A (en) * 1988-04-27 1989-11-07 Sanyo Electric Co Ltd Electric stove
KR970041784U (en) * 1995-12-12 1997-07-29 대우전자주식회사 Electric fan
KR0132177B1 (en) * 1995-08-30 1998-04-20 배순훈 Hot/cool wind motor fan

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JPS5751190U (en) * 1980-09-08 1982-03-24
JPS62204240U (en) * 1986-06-16 1987-12-26
JPH01139931A (en) * 1987-11-26 1989-06-01 Sanyo Electric Co Ltd Electric stove also acting as electric fan
JPH01277166A (en) * 1988-04-27 1989-11-07 Sanyo Electric Co Ltd Electric stove
KR0132177B1 (en) * 1995-08-30 1998-04-20 배순훈 Hot/cool wind motor fan
KR970041784U (en) * 1995-12-12 1997-07-29 대우전자주식회사 Electric fan

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8951024B2 (en) 2009-06-04 2015-02-10 Sharp Kabushiki Kaisha Air blower
CN102032219A (en) * 2011-01-07 2011-04-27 佛山市富士宝电器科技股份有限公司 Fan mesh enclosure
WO2016127454A1 (en) * 2015-02-11 2016-08-18 许文龙 Multipurpose fan
CN105065310A (en) * 2015-08-07 2015-11-18 无锡市悦丰化工有限公司 Electric fan made from stable material
CN113847665A (en) * 2021-11-02 2021-12-28 嘉兴学院 Reflective radiation cooling system

Also Published As

Publication number Publication date
WO2000058669A3 (en) 2001-03-01
AU3463000A (en) 2000-10-16
JP2003525375A (en) 2003-08-26
CN1310793A (en) 2001-08-29
JP3451435B2 (en) 2003-09-29

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