CA2155482A1 - Portable electric fan heater - Google Patents

Portable electric fan heater

Info

Publication number
CA2155482A1
CA2155482A1 CA 2155482 CA2155482A CA2155482A1 CA 2155482 A1 CA2155482 A1 CA 2155482A1 CA 2155482 CA2155482 CA 2155482 CA 2155482 A CA2155482 A CA 2155482A CA 2155482 A1 CA2155482 A1 CA 2155482A1
Authority
CA
Grant status
Application
Patent type
Prior art keywords
fan
means
heater
switch
electric motor
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
CA 2155482
Other languages
French (fr)
Inventor
Bernard Chiu
Jui-Shang Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honeywell Consumer Products Inc
Original Assignee
Honeywell Consumer Products Inc
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

Links

Abstract

A portable electric fan-heater including a base; a housing mounted on the base and defining an inlet opening and an outlet opening; a fan blade rotatably mounted in the housing and operable to produce air flow between the inlet and outlet openings;
an electric motor supported by the housing and operatively coupled to the fan blade, and a resistive heater mounted in the housing between the inlet and outlet openings. Also included is a control circuit electrically connected to provide energization of the electric motor and the resistive heater; the control circuit having a switching system for selectively and independently energizing the electric motor to produce for the fan blade a plurality of different rotational speeds including maximum and minimum speeds and for simultaneously energizing both the electric motor and the resistive heater and a response circuit means for automatically producing for the fan blade a rotational speed less than the maximum speed in response to energization of the resistive heater. The switching system and response circuit insure optimum performance when the fan-heater is operating in either a heating or cooling mode.

Description

2 1 5~82 The invention relates generally to a portable electric appliance and, more particularly, to a portable electric appliance which can alternatively provide either ambient temperature or heated airflow.
Portable electric fans are used extensively during warm weather to enhance personal comfort within an enclosure by producing air movement. Conversely, during cool periods, portable electric heaters are used to enhance personal comfort by altering environmental conditions with specific enclosures with heated air.
Also known are portable combination appliances which can function alternatively as either fans or heaters. Examples of such combination appliances are disclosed in U.S. Patents Nos. 1,980,689;
2,041,897; 2,391,964; 2,473,325; and 2,606,273. Prior fan-heater combinations, however, have been deficient for a variety of reasons including a lack of operational flexibility and potential for unsafe operation.
The object of this invention, therefore, is to provide an improved portable appliance that can be desirably and safely employed to enhance personal comfort during either individually perceived overly warm or overly cold environmental conditions.
The invention is a portable electric fan-heater including a base; a housing mounted on the base and defining an inlet opening and an outlet opening; a fan blade rotatably mounted in the housing 21~4~2 and operable to produce air flow between the inlet and outlet openings; an electric motor supported by the housing and operatively coupled to the fan blade; and a resistive heater mounted in the housing between the inlet and outlet openings.
Also included is a control circuit electrically connected to provide energization of the electric motor and the resistive heater; the control circuit having a switching system for selectively and independently energizing the electric motor to produce for the fan blade a plurality of different rotational speeds including maximum and minimum speeds and for simultaneously energizing both the electric motor and the resistive heater, and a response circuit means for automatically producing for the fan blade a rotational speed less than the maximum speed in response to energization of the resistive heater. The switching system and response circuit insure optimum performance when the fan-heater is operating in either a heating or cooling mode.
According to one feature of the invention, the response circuit produces the minimum speed in response to energization of the resistive heater. This feature prevents undesirably high air flow when the fan-heater is operating in the heating mode.
According to another feature of the invention, the switching system includes a manually operable multiple position on-off switch having an off position deenergizing both the electric 2155~82 motor and the resistive heater, a fan position energizing only the electric motor, and a heater position energizing both the electric motor and the resistive heater. Either heating or cooling modes are selected with a single switch.
According to other features of the invention, the switching system comprises a fan switch for selectively producing the different speeds, a thermostatic switch for controlling energization of the resistive heater, and a tip switch for deenergizing both the electric motor and the resistive heater in response to an abnormal orientation of the fan-heater. The switching system insures for the fan-heater both desirable operating characteristics and safe operation.
According to yet other features of the invention, the base has a pedestal portion defining a planar surface for supporting the fan-heater on a substantially horizontal foundation, and a yoke portion projectlng upwardly from the pedestal portion and having a pair of arms pivotally supporting the housing; and the control circuit is mounted on the pedestal portion. These features provide an efficient arrangement of component parts.
These and other objects and features of the invention will become more apparent upon a perusal of the following description taken in conjunction with the accompanying drawings wherein:
Fig. 1 is a perspective view of a fan-heater according to the invention;

21 55~2 Fig. 2 is a rear view of the fan-heater shown in Fig. l;
Fig. 3 is a side view of the fan-heater shown in Fig. l;
Fig. 4 is a top view of the fan-heater shown in Figs. 1-3; and Fig. 5 is a diagram of a control circuit for the fan-heater shown in Figs. 1-4.
A fan-heater combination 11 includes a fan housing 12 mounted on a base 13. Defined by the fan housing 12 are an inlet opening 15 and an aligned outlet opening 16, each covered, respectively, by an inlet grill 17 and an outlet grill 18.
A fan blade 21 is rotatably mounted within the fan housing 12 between the inlet opening 15 and the outlet opening 16.
Operatively coupled to the fan blade 21 is an electric motor 22.
In response to energization of the electric motor 22, resultant rotation of the fan blade 21 produces air flow between the inlet opening 15 and the outlet opening 16. Also mounted in the fan housing 12 and within the air flow path provided by the fan blade 21 is an annular, coiled resistive heater element 25.
The base 13 includes a pedestal portion 26 and a yoke portion 27 formed by a pair of spaced apart arms 28, 29 projecting upwardly therefrom. Pins 31, 32 retained by apertures in, respectively, the arms 28, 29 pivotally support the fan housing 12 on the yoke portion 27. Formed on an upper surface of the pedestal portion 26 is a control panel 35 retaining a fan actuator knob 36, an on-off actuator lever 37, a power lamp 38, a caution LED lamp 39 and a thermostatic actuator knob 40. A
bottom of the pedestal portion 26 defines a planar surface 41 suitable for mounting the fan-heater 11 on a suitable horizontal foundation (not shown). Retained within the pedestal portion 26 is a control circuit 43 (Fig. 5) associated with the lever 37, the actuator knobs 36 and 40, and the signal lamps 38 and 39.
The control circuit 42 shown in Fig. 5 includes a three-position toggle switch 43 and a four-position rotary switch 45 operated, respectively, by the on-off actuator 37 and the fan actuator knob 36 (Fig. 1). Connected to contacts Rl, R2 of the switch 43 are lines Pl, P2 from a plug 45 insertable into a conventional electrical socket (not shown). Connected by the rotary switch 44 to contacts R2, R3 and R4 of the switch 43 through capacitors C2, C3 are series windings 47-49 of the electric motor 22. Contacts R5 and R6 of the switch 43 are connected across the resistive heater element 25 by a high limit thermostatic switch 51, a regulating thermostatic switch 52 and a tip-over switch 53.
Connecting a junction 56 between the heater element 56 and the thermostatic switch 51 and a junction 57 between a terminal T3 of 2t5~82 the rotary switch 44 and the winding 49 is a line 58. The caution lamp 39 (Fig. 1) is connected between the junction 57 and a junction 61 between the regulating thermostatic switch 52 and the high limit thermostatic switch 51. Connected across the lines Pl, P2 is the power lamp 38 shown in Fig. 1.
With the plug 45 inserted into a socket, the power lamp 38 is energized to indicate the availability of power. However, with the on-off switch 43 in an off position, the contacts Rl and R2 are disconnected from the heating element 25 and the electric motor 22 so as to prevent energization thereof. The switch 43 can be actuated by the lever 37 (Fig. 1) into a fan position connecting the contacts Rl, R2, respectively, to the contacts R3, R4 so as to provide power at the rotary switch 44 which in turn can be manually actuated into off, low, medium and high positions with the fan actuator knob 36. In an off position, the rotary switch 44 is disconnected from the motor 22 so as to prevent energization of the windings 47-49. However, in a high speed position of the switch 44, all three windings 47-49 are connected to the active contacts R3, R4 of the switch 43 through the terminals L, Tl of the switch 44 and the capacitors C2, C3 to energize the motor 22 and provide maximum rotational speed of the fan blade 21. Conversely, in a low speed position of the switch 44, only the winding 49 is connected to the active terminals R3, R4 21~5~82 of the switch 43 through the terminals L and T3 and the capacitors C2, C3 to produce a minimum rotational speed of the fan blade 21.
In a medium speed position of the rotary switch 44, the windings 48, 49 are connected to the active contacts R3, R4 of the switch 43 through the terminals L and T2 and the capacitors C2, C3 to produce an intermediate rotational speed of the fan blade 21.
With the on-off switch 43 in the fan position, the contacts R5, R6 and disconnected from the active contacts Rl, R6 so that the heating element 25 is deenergized for all operating positions of the rotary switch 44.
A heating operational mode of the fan-heater 11 is initiated by actuating the on-off switch 43 into a heater position connecting the contacts Rl, R2, respectively, to the contacts R5, R6. Resultant current flow through the heating element 25 produces resistance heating thereof. In addition, the winding 49 of the motor 22 is energized through the response circuit line 58 and the capacitor C2 to induce the minimum rotational speed of the fan blade 21. Rotation of the fan blade 21 produces by the heating element 25, a relatively low flow rate of air that is optimally heated to be perceptively warm.
At a given ambient temperature level selected by the thermostatic knob 40, the regulating thermostatic switch 52 opens to deenergize the heating element 25 and the fan motor 22. A

21~54~2 g similar result is obtained in response to an abnormal orientation of the fan-heater 11 that induces opening of the tip switch 53.
In response to a predetermined excessive ambient temperature level, the high limit thermostatic switch 51 is opened to deenergize both the heating element 25 and the fan motor 22. That potentially unsafe condition also opens the line 58 across the caution lamp 39 which is thereby energized to indicate the abnormal condition.
Obviously, many modifications and variations of the present invention are possible in light of the above teachings.
It is to be understood, therefore, that the invention can be practiced otherwise than as specifically described.

Claims (18)

1. A portable electric fan-heater comprising:
base means;
housing means mounted on said base means and defining an inlet opening and an outlet opening;
a fan blade rotatably mounted in said housing means and operable to produce air flow between said inlet opening and said outlet opening;
an electric motor supported by said housing means and operatively coupled to said fan blade;
resistive heater means mounted in said housing means and operatively coupled to said fan blade;
resistive heater means mounted in said housing means between said inlet opening and said outlet opening;
control circuit means electrically connected to provide energization of said electric motor and said resistive heater means; said control circuit means comprising switching means for selectively and independently energizing said electric motor to produce for said fan blade a plurality of different rotational speeds including maximum and minimum speeds, and for simultaneously energizing both said electric motor and said resistive heater means, and response circuit means for automatically producing for said fan blade a rotational speed less than said maximum speed in response to energization of said resistive heater means.
2. A fan-heater according to claim 1 wherein said response circuit means produces said minimum speed in response to energization of said resistive heater means.
3. A fan-heater according to claim 2 wherein said switching means comprises a manually operable multiple position on-off switch having an off position deenergizing both said electric motor means and said resistive heater means, a fan position energizing only said electric motor, and a heater position energizing both said electric motor and said resistive heater means.
4. A fan-heater according to claim 3 wherein said switching means comprises a fan switch for selectively producing said different speeds.
5. A fan-heater according to claim 4 wherein said switching means comprises a thermostatic switch for controlling energization of said resistive heater means.
6. A fan-heater according to claim 5 wherein said switching circuit means comprises a tip switch for deenergizing said electric motor and said resistive heater means in response to an abnormal orientation of said fan-heater.
7. A fan-heater according to claim 6 wherein said on-off switch is a toggle switch and said fan switch is a rotary switch.
8. A fan-heater according to claim 7 wherein said base means comprises a pedestal portion defining a planar surface for supporting said fan on a substantially horizontal foundation, and a yoke portion projecting upwardly from said pedestal portion and having a pair of arms pivotally supporting said housing means.
9. A fan-heater according to claim 8 wherein said control circuit means is retained by said pedestal portion.
10. A fan-heater according to claim 1 wherein said switching circuit means comprises a manually operable multiple position on-off switch having an off position deenergizing both said electric motor means and said resistive heater means, a fan position energizing only said electric motor, and a heater position energizing both said electric motor and said resistive heater means.
11. A fan-heater according to claim 10 wherein said switching means comprises a fan switch for selectively producing said different speeds.
12. A fan-heater according to claim 11 wherein said circuit switching means comprises a thermostatic switch for controlling energization of said resistive heater means.
13. A fan-heater according to claim 12 wherein said switching circuit means comprises a tip switch for deenergizing said electric motor and said resistive heater means in response to an abnormal orientation of said fan.
14. A fan-heater according to claim 13 wherein said on-off switch is a toggle switch and said fan switch is a rotary switch.
15. A fan-heater according to claim 14 wherein said base means comprises a pedestal portion defining a planar surface for supporting said fan on a substantially horizontal foundation, and a yoke portion projecting upwardly from said pedestal portion and having a pair of arms pivotally supporting said housing means.
16. A fan-heater according to claim 5 wherein each of said on-off switch and said rotary switch include an actuator mounted on said pedestal portion.
17. A fan-heater according to claim 1 wherein said base means comprises a pedestal portion defining a planar surface for supporting said fan on a substantially horizontal foundation, and a yoke portion projecting upwardly from said pedestal portion and having a pair of arms pivotally supporting said housing means.
18. A fan-heater according to claim 17 wherein said response circuit means produces said minimum speed in response to energization of said resistive heater means.
CA 2155482 1995-03-27 1995-08-04 Portable electric fan heater Abandoned CA2155482A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US41136295 true 1995-03-27 1995-03-27
US08/411,362 1995-03-27

Publications (1)

Publication Number Publication Date
CA2155482A1 true true CA2155482A1 (en) 1996-09-28

Family

ID=23628623

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2155482 Abandoned CA2155482A1 (en) 1995-03-27 1995-08-04 Portable electric fan heater

Country Status (1)

Country Link
CA (1) CA2155482A1 (en)

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