GB2125954A - Ceiling fans; space heaters - Google Patents
Ceiling fans; space heaters Download PDFInfo
- Publication number
- GB2125954A GB2125954A GB08223538A GB8223538A GB2125954A GB 2125954 A GB2125954 A GB 2125954A GB 08223538 A GB08223538 A GB 08223538A GB 8223538 A GB8223538 A GB 8223538A GB 2125954 A GB2125954 A GB 2125954A
- Authority
- GB
- United Kingdom
- Prior art keywords
- air
- housing
- ceiling fan
- blades
- stream
- 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.)
- Withdrawn
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
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
-
- 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
- F04D25/088—Ceiling fans
-
- 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
Abstract
A ceiling fan arranged to be used either as a conventional ventilation fan or a combined fan and heater comprises a housing (12) containing a motor (14) having a stator (13) and rotor (15) to rotate a number of blades (20) to create a stream of air (arrows A), one or more heating elements (16) around the motor and means e.g. a radial fan (18) for generating a flow of air (arrows B) through the housing over the heating elements and into the stream of air (arrows B) generated by the rotation of the blades. <IMAGE>
Description
SPECIFICATION
Ceiling fans space heaters
This invention relates to ceiling fans.
Known ceiling fans are used only in hot or warm conditions for ventilation and cooling purposes. During cold or cool conditions, known ceiling fans are usually switched off and not used.
In most countries such ceiling fans are thus not used up to six months in the year and accordingly may be regarded by individuals as a luxury item.
In a room it is well known that warmer air rises to lie adjacent the ceiling while cooler air falls to lie adjacent the floor. In known ceiling fans the cooling effect of the air movement outweighs any improvement in temperature distribution when this warm air is re-circulated, even when the fan is run at a low speed.
It is an object of the present invention to overcome or mitigate one or more of the above problems.
In accordance with the invention, a ceiling fan comprises a housing to be hung down from a ceiling, the housing containing a motor having a stationary stator and a rotatable rotor which rotates a number of blades to create a stream of air, one or more electrical heating elements positioned within the housing and around the outside of the motor and means for generating a flow of air through the housing over the heating elements for heating that air and out into the stream of air generated by the rotation of the blades.
Advantageously such a ceiling fan can be used either as a conventional ventilation fan or a combined heater and fan. Furthermore such a ceiling fan can heat all the air in a room with the use of a minimum amount of energy.
Preferably the means for generating a flow of air through the housing comprises a radial fan element positioned within the housing and around the outside of the motor. The radial fan acts to pass air over the heating elements and push that air into the stream of air generated by the blades and cool the motor. The air is emitted from the radial fan in a tangential and radial direction into the stream of air generated by the blades.
The blades are advantageously mounted on the rotor such that they rotate above the area where the heated air is emitted from the housing, causing the heated air to move in a downward direction. The heated air mixes with the downward stream of air and causes that air to warm up.
Alternatively the blades are mounted on the rotor such that they rotate below the area where the heated air is emitted from the housing, causing the heated air to move in an upward direction, resulting in the heated air mixing with the upward stream of air and causing that air to warm up.
In each case the stream of air caused by the blades is directed towards the area where the heated air is emitted from the housing.
Preferably, the air flowing through the housing is relatively smaller in volume and quicker moving than the volume of air in the stream created by the blades such that only a small volume of air is heated to warm up a large volume of air.
Advantageously, this means that a smaller heating unit needs to be used, less energy is used for the radial fan to force the air through the housing and any heat "build up" in the housing is prevented.
A conventional ceiling fan motor is preferably used comprising a central stationary stator and an outer rotating rotor.
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a diagrammatic representation of a ceiling fan in accordance with the invention;
Figure 2 is a cross sectional view of the ceiling fan of Figure 1 along line C-C; and
Figure 3 is an enlarged view of a portion shown in Figure 2.
The ceiling fan 10 shown in the drawings is supported from a ceiling 11 and comprises a housing 12 containing, a conventional motor 14 with a central stationary stator 13 and outer rotatable rotor 15, heating elements 16 and a radial fan 1 8. A number of blades 20 are supported on the upper surface of the rotor 1 5 such that when the rotor rotates a downward stream of air (see arrows A) is created by the blades 20.
A secondary stream of air is produced by the radial fans 18 which generates a flow of air (see arrows B) through the housing 1 2 over the heating elements 1 6 causing the air to be heated, and out into the downward stream of air created by the blades 20.
The fan 10 can thus be used in two modes.
Firstly, during hot or warm conditions, the heating elements are turned off and the fan used as a conventional ventilation and cooling fan.
Secondly, during cold or cool conditions, the heating elements are turned on and the fan used as a combined heater and ventilation fan.
The radial fan or blower 1 8 is supported by supports 19 mounted on the rotor 1 5 such that it rotates relative to the stationary heating elements 16, stator 13 and housing 14. The radial fan 18 comprises a number of vent members 22 which are straight such that air is drawn through the gap between blower 1 8 and rotor 1 5 and over the heating elements 1 6. The fan prevents any heat build-up in the rotor or heating elements, and forces the hot air into the downward stream A.
Preferably, the fan 18, rotor 1 5 and blades 20 rotate in the approximate range of speeds that conventional ceiling fans rotate.
The blades 20 are mounted on the upper portions of the rotor 1 5 such that they rotate above the area where the heated air (see arrows
B) is emitted from the housing 12 causing the heated air to move in a downward direction with the stream of air caused by the blades (see arrows
A). The heated air mixed with the stream of air and causes that air to warm up.
The air flowing through the housing (see arrows
B) is preferably relatively smaller in volume and quicker moving than the volume of air in the downward stream (see arrows A) such that only a small amount of air is heated to warm up a large volume of air.
The advantage of heating a relatively small volume of air is that only a small heating unit needs to be used to heat a relatively small volume of air but warm up a relatively large volume of air..
A smaller and lighter heating unit can be easily supported in the housing hung from the ceiling.
Alternatively, a larger and heavier heating unit would have to be used to warm up the large volume of air and this would be impractical as the unit would be too heavy to be supported in a ceiling fan which is supported from a ceiling.
Another advantage of heating a relatively small volume of air is that the radial fan has only to force a small volume of air through the housing and accordingly uses a minimum amount of energy.
The advantage of forcing the air through the housing relatively quickly is that the ceiling fan will not "heat up" due to the heat build-up in the heating unit and rotating rotor as any hot air is quickly removed from the housing. A thermostat can be used also to prevent excessive heat buildup.
As noted in the Consumer Reports (published by Consumers Union) July 1982 edition P.351 the cooling effect of a conventional ceiling fan when used to re-circulate warmer air lying adjacent the ceiling tends to outweigh any improvement in temperature distribution in a room. The ceiling fan in accordance with the invention overcomes this problem by providing heating elements within the housing to heat the stream of air caused by the blades.
An advantage of a ceiling fan in accordance with the invention over conventional blow fan heaters is that all the air in a small or middle sized room is circulated by the ceiling fan and gently warmed up which is in contrast with a blow fan heater where a concentrated stream of hot air is emitted into the relatively colder room.
Tests involving a ceiling fan in accordance with the invention with heating elements with a 1.5 KW capacity have achieved a 1 40F (7.80C) rise in temperature of the air within the room of sizeof14ft. x 14ft.(2.5m x 3.5m)in20 minutes.
Claims (11)
1. A ceiling fan comprising a housing to be hung down from a ceiling, the housing containing a motor having a stationary stator and a rotatable rotor which rotates a number of blades mounted outside the housing to create a stream of air past the housing, one or more electrical heating elements positioned within the housing and around the outside of the motor and means for generating a flow of air passing through the housing and over the heating elements and out of the housing to mix with the stream of air generated by the rotation of the blades.
2. A ceiling fan as claimed in Claim 1 wherein the means for generating a flow of air is connected to the rotor of the motor such that the means rotates with the rotor.
3. A ceiling fan as claimed in either Claim 1 or
Claim 2 wherein the means for generating a flow of air through the housing comprises a radial fan element positioned within the housing and around the outside of the motor so that air passes over the heating elements and is emitted into the stream of air generated by the blades.
4. A ceiling fan as claimed in Claim 3 wherein the flow of air through the housing is emitted in a tangential and radial direction into the stream of air generated by the blades.
5. A ceiling fan as claimed in any preceding claim wherein the blades are mounted on the rotor such that they rotate above the area where the heated air is emitted from the housing, causing the heated air to move in a downward direction.
6. A ceiling fan as claimed in any one of claims 1 to 4 wherein the blades are mounted on the rotor such that they rotate below the area where the heated air is emitted from the housing causing the heated air to move in an upward direction.
7. A ceiling fan as claimed in any preceding claim wherein the stream of air caused by the blades is directed towards the area where the heated air is emitted from the housing.
8. A ceiling fan as claimed in any preceding claim wherein the air flowing through the housing is relatively smaller in volume and quicker moving than the volume of air in the stream created by the blades such that only a small volume of air is heated to warm up a large volume of air.
9. A ceiling fan as claimed in any preceding claim wherein a ceiling fan motor is used comprising a central stationary stator and an outer rotating rotor.
10. A ceiling fan as claimed in any preceding claim in which the air flow through the housing is generated by means driven by the motor.
11. A ceiling fan substantially as herein described with reference to the accompanying drawings.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08223538A GB2125954A (en) | 1982-08-16 | 1982-08-16 | Ceiling fans; space heaters |
| GB08231200A GB2125484B (en) | 1982-08-16 | 1982-11-01 | Ceiling fans |
| AU15760/83A AU1576083A (en) | 1982-08-16 | 1983-06-14 | Ceiling fan with integral heating elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08223538A GB2125954A (en) | 1982-08-16 | 1982-08-16 | Ceiling fans; space heaters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2125954A true GB2125954A (en) | 1984-03-14 |
Family
ID=10532331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08223538A Withdrawn GB2125954A (en) | 1982-08-16 | 1982-08-16 | Ceiling fans; space heaters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2125954A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2215452A (en) * | 1988-03-18 | 1989-09-20 | Carroway Enterprises Limited | A fan assembly |
| WO1996016301A1 (en) * | 1994-11-17 | 1996-05-30 | Mcdougall Gregory J | Electric fan heater |
-
1982
- 1982-08-16 GB GB08223538A patent/GB2125954A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2215452A (en) * | 1988-03-18 | 1989-09-20 | Carroway Enterprises Limited | A fan assembly |
| WO1996016301A1 (en) * | 1994-11-17 | 1996-05-30 | Mcdougall Gregory J | Electric fan heater |
| GB2309900A (en) * | 1994-11-17 | 1997-08-13 | Mcdougall Gregory J | Electric fan heater |
| GB2309900B (en) * | 1994-11-17 | 1998-03-25 | Mcdougall Gregory J | Electric fan heater |
| US5778144A (en) * | 1994-11-17 | 1998-07-07 | Mcdougall; Greg | Electric fan heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |