CN103443471A

CN103443471A - Heating fan

Info

Publication number: CN103443471A
Application number: CN2012800080166A
Authority: CN
Inventors: S·罗德布罗
Original assignee: SORO HOLDING APS
Current assignee: SORO HOLDING APS
Priority date: 2011-02-07
Filing date: 2012-02-07
Publication date: 2013-12-11
Also published as: CA2825268A1; WO2012107047A2; WO2012107047A3; EP2673513A2; WO2012107047A9; EP2673513B1; US20140056578A1

Abstract

Heating fan, where said fan comprises fastening means for fastening of said fan to a first surface, a stem connecting the fastening means to a hub, where said hub comprises a motor unit, where said motor unit rotates a plurality of wings extending radially from said hub, such that the wings have an upper and a lower surface, characterised in that each wing has a leading and trailing edge, defining upper and lower surfaces there between where at least one wing has electrical heating means integrated or connected to said upper surface, where at least more than half the length of the leading and/or trailing edge is bent downwards relative to the surface of the wing.

Description

Add Hot-air fan

Technical field

The present invention relates to a kind of Hot-air fan that adds.

Background technique

Many fans for circulation or mobile air are arranged in related domain.

One special section of all these fans is provided with heating equipment, makes when fan is activated, and the air that the blade of fan/fan wing drives can be heated, and improves thus whole room temperature.Patent US2009/0116961, US4504191, can find the example of the fan with heating equipment in US449414.

A total problem of this fan is heat is delivered to the air contacted with blade and air is evenly distributed in more to whole indoor ability simultaneously from heating element, otherwise air only to be distributed in the place ahead or the below of fan blade.These problems all successfully solve in as patent US4867643 and US2006/0110257 in prior art.

Although some prior art documents are recognized for making the heating element transmission of heat from the blade that is arranged on above-mentioned this fan, preferably can be near air-foil blade turbulization, but, for generation of the mode of required turbulent flow usually with air-distribution by heating to larger zone or the demand that reduces as far as possible essential energy conflict mutually, described essential energy is for the speed rotor blade with such, that is, by blade, driven and the air that moves can arrive farther place only in the fan front.

Goal of the invention

Therefore, one object of the present invention is to provide a kind of fan, and the problem that this fan can solve prior art can provide more advantages again simultaneously.

Summary of the invention

The present invention is by providing a kind of Hot-air fan that adds to realize this purpose, wherein this fan comprises for fan being fastened to the securing means of first surface, securing means is connected to the bar of hub section, wherein said hub section comprises motor unit, this motor unit rotates a plurality of fan wings, the described fan wing radially extends from described hub section, thereby the described fan wing has upper surface and lower surface, it is characterized in that, each fan wing has leading edge and trailing edge, define upper surface and lower surface between leading edge and trailing edge, wherein, at least one fan wing has Electric heating appliance integrated with described upper surface or that be connected, the length at least over half of described leading edge and/or trailing edge is bent downwardly with respect to the surface of the fan wing.

By making simply near zone blade inlet edge and trailing edge outwardly-bent a little with respect to the plane of the main region of fan wing surface, produced turbulent flow on the surface of the fan wing, the place ahead of the heating element arranged on the surface of the fan wing has thus produced the optimal heat switching performance.

Simultaneously, the main region of the fan wing keeps relatively flat, makes and treats that contacting of mobile air is relatively high, and air thus effectively can distribute.

In a further advantageous embodiment of the invention, in the radially extension (direction) of the described fan wing with respect to hub section on vertical cross section, the fan wing contour comprises section's section of three different substantially linears,, from leading edge extend 5-25mm the first linear portion section, extend the second linear portion section of 5-25mm and be located at the 3rd linear portion section between first and second sections from trailing edge, wherein the 3rd linear portion section has the length of 35-110mm, and the first and second linear portion sections become the angle of 5 °-60 ° with respect to the 3rd section.

The actual size of putting down in writing in this embodiment is guaranteed to provide enough space surface for heating element, make and can provide a large amount of energy by the contact area between the wing for air and fan, enough territories, fan pterion are provided simultaneously so that with the air movement that adds Hot-air fan and contact.For the heat exchanging function between the air of optimizing fan blade surface and contact with it, bent section is only for generation of turbulent flow.

In another advantageous embodiment of the present invention, described heating equipment is provided by metal lead wire (metal leads), this metal lead wire has about 40 Ω or larger Ohmic resistance, and wherein said metal lead wire embeds and preferably contains in the thick film heat distribution enamelled coating of glass.

Although in prior art and above set forth, in order at heating element with between the air of wishing to heat, to produce the optimal heat exchange capacity, near blade surface, turbulization is very important, but enough heating equipments are set from the teeth outwards so that large energy can be passed to air from heating element also extremely important.Experiment shows, with laminar air flow, compares, and increases by about 40% heat exchange by surperficial turbulent air flow.

Certainly, this has improved the efficiency that adds Hot-air fan, and this is the feature of a hope.Therefore, in order to give, the invention provides the large as far as possible area of heating surface, it is upper that lead-in wire is evenly distributed in surface, and, in order further to redistribute heat, thick film layers is evenly distributed in the heat of generation on the whole surface of heating fan blade substantially.

Suitable material is " insulation composition 4924 " that can obtain from U.S. ESL electro-science.This paste (paste) is applied in required layer thickness according to manufacturer's indication in silk screen printing process.This paste comprises ultra micro glass particle/ball, and it provides and makes it be particularly useful for the property of current application.

An importance of described material is that thermal property corresponds essentially to body material, and this body material can be typically rustless ferrite steel.Like this, in fan wing running, that is, when heating and cooling cause making the steel part thermal expansion of the fan wing, because described material can move together with steel, therefore can reduce or avoid the crack of not expecting in heat distribution thick film layers fully.

The fan wing structure of the reality of using in research and development of the present invention is by the stainless steel manufacture.Be applied with first layer dielectric medium " insulation composition 4924 ".This layer is placed in baking oven and this layer of sclerosis.Then, the electrical lead of being made by thick film silver palladium material is set up from the teeth outwards (as shown in Figure 2), and after-hardening.Finally, place and solidify " insulation composition 4924 " that another layer is very thin.This top layer is thinned to almost transparent.

Typically, blade used in the present invention, by the metal manufacture, is generally plain carbon steel, and along with the electrical resistance heating element by being arranged on blade surface produces heat, blade itself also can generate heat.This heating causes thermal expansion, for selecting suitable thick-layer paint, can select to have the paint with the essentially identical thermal expansion coefficient of steel, in order to fissureless consistent surface is provided.In this respect, do not occur that crack is very important, because crack is unfavorable for heat, distributes and be unfavorable for that thus the ，Gai effective area, effective area of blade can be from energy source through heating element and the transfer of air heat that needs heating.Therefore, by selecting suitable material, make heat substantially be evenly distributed on the whole surface of blade, thereby, simultaneously in the material heating of making blade and while expanding, the thermal expansion coefficient of paste paint layer should be chosen as to be avoided crack or at least makes crack minimize.

For the turbulent flow that improves blade produces ability, that blade surface can be provided with is prominent such as pit, ridge, the device groove or other inhomogeneous sections.Can improve the thermal heat transfer capability between blade and surrounding atmosphere like this.

In another advantageous embodiment, described hub section comprises current collector, this current collector is delivered at least one heating element at least one being arranged on described a plurality of fan wing by electric power from described bar/hub section, wherein this current collector comprises the non-conductive parts in center, the at least the first and second conductive members are non-conductive parts setting around this center, wherein, non-conductive device is arranged between this first and second conductive member, the first and second impeller assemblys are set to and the first and second conductive members difference conductive contacts, wherein said the first and second impeller assemblys comprise for the device with being arranged on the heating equipment conduction of fan on the wing and being connected.

Another the important requirement that adds Hot-air fan is to have the ability that is arranged on the heating element on blade that transfers energy to.Therefore, the invention provides a kind of current collector be arranged in hub section, make when blade when hub section rotates, energy will be passed to the heating element on blade.By relatively large surface is provided between rotating part and stationary part, can transmit than relatively large energy, make heating element compare the temperature that can reach higher with the device of prior art, and, due to the turbulent-flow conditions of next-door neighbour's heating element top, can transmit more multipotency and realize thus better heating by air.

By the first and second impeller assemblys are engaged with the surface on the first and second conductive members, can realize larger zone, make surface that blade increases have and transmit the more possibility of multipotency, rather than as generator (dynamo) or other stator-rotors arrange the EDGE CONTACT of conductive member and the first conductive member.

Simultaneously, when the mechanical force between blade and the first conductive member be distributed in one larger when regional, much less is wanted in the common setting of mechanical wear/wear resistance ratio between these two parts.

In another advantageous embodiment, by making structure alternately, this current collector can be provided with any amount of power delivery surface, makes conductive vanes parts and electric installation rotating contact and non-conductive device be arranged between electric installation simply.Like this, can be more multiple-blade more multipotency is provided, make thus that whole to add Hot-air fan more effective.

To transfer its energy to blade and be arranged on the required electrical lead of electrical resistance heating element on blade in order to hold, the non-conductive parts in described center are about the central axis symmetry, non-conductive device and central module are integral, and electrical lead can be arranged in the non-conductive parts in center and with conductive member and electrically contacts.

The accompanying drawing explanation

Fig. 1 shows a ceiling fan;

Fig. 2 shows according to blade of the present invention;

Fig. 3 and Fig. 4 show according to current collector of the present invention.

Embodiment

Fig. 1 shows a ceiling fan, and its fan 1 is installed on ceiling board 3 by securing means 2.Bar 4 is connected to securing means 2 in hub section 5.Hub section comprises for the motor apparatus of rotor blade 6 with for the current collector device to being arranged on the heating equipment distribution electric power on blade 6.Like this, when adding the Hot-air fan energising, blade 6 will be around the axle rotation that is basically parallel to described bar, blade 6 contacts with ambient air thus, due to the energy interchange between the lip-deep heating element of blade 6, heat can be delivered to air, and, due to the position of blade 6, air is pushed down in the present embodiment.Downward air movement produces low pressure on blade, makes air be drawn into and pulls to blade.Can realize so nearly all circulation of air in the room of a sealing.

A key of the present invention and important aspect are heat can be delivered to ambient air from the heating element be arranged under blade 6.

Fig. 2 shows according to a blade of the present invention.Blade 6 comprises three

different sections sections

10,11,12.In the present embodiment, section's

section

11,12 is along leading edge and

trailing edge

13,14 settings and basic identical.Surface coverage between section's

section

11,12 has thick film enamelled coating 15, in this thick film enamelled coating, is embedded with electrical resistance heating element 16.Because energy is to offer heating element with electric form, therefore almost painted surface 15 and the heating element 16 of the combination of whole section 10 will generate heat in covering.When blade 6 is usingd one of

edge

13 or 14 as leading edge and another edge while being rotated as trailing edge, because of the angle between section's section 10 and section's

section

11,12, air will be due to described angled section as turbulent flow and non-laminar flow by surface 10.Like this, the heat exchange meeting between the air that the heating element arranged on surface 10 and blade 6 rotations transmit improves a lot, and can provide more energy by adding Hot-air fan thus.

The cross section of the fan blade shown in Fig. 2 has the front and

rear part section

11,12 of two basic the same sizes, but they can be of different sizes, and can imagine a part of only having

edge

13,14 and be provided with section's

section

11,12 of stretching out from the Plane Rotation of remaining surface 10.

Yet the blade shown in Fig. 2 is brought up to temperature the indoor experiment of repeatedly carrying out of 20 ℃ verified very effective from about 6 ℃ in hope.This chamber is 4 * 5 meters sizes approximately, apart from approximately 3 meters, ceiling board.After recording temperature and being 6 ℃, fan is opened.Between the whole period of heating, this power consumpiton that adds Hot-air fan is adjusted to maximum horizontal, and after fan rotates 13-16 minute with peak output, room temperature increases to 20 ℃ from 6 ℃.The Hot-air fan that adds for this test has three blades that are evenly arranged in hub section periphery, and wherein each blade is about 38cm, and first and the 3rd section is about 10mm, and like this, the center surface 10 that is provided with heating element 16 is positioned at the zone of about 9cm * 25cm.The Standard Steel blade that blade is thick by about 1.5mm is made.Room temperature be the axis of described bar apart from adding Hot-air fan about two meters and on floor approximately the position of a meter measure.

And experiment shows that above-mentioned each blade can produce the power of about 1000 watts.Owing to thering are three blades, produce the blowout that the required electric energy of peak output can cause the ordinary family circuit.Therefore the control electronic equipment in fan is programmed for and only allows blade to produce less power, or blade should be connected to a more powerful power supply.

Fan also can be designed for the specific geographical conditions of its application.For example the size of the general insurance silk of European mediterranean country is 6 amperes, and the safety fuse cutout of 10 or 16 amperes is used in Northern Europe/Scandinavia.Therefore, the producible wattage of fan should corresponding adjustment.

This another very important aspect that adds Hot-air fan is, power can be passed to heating element.The present invention has solved this problem by the current collector shown in Fig. 3.Current collector 20 comprises the first non-conductive core components 21, and it is for isolating the first and second conductive members 22,23.The first and second

conductive members

22,23 ringwise, and are made by metal or metal alloy, such as copper etc.

Insulating core 21 can be by any suitable non-conducting material manufacture, as plastics, and pottery etc.Non-conductive core components is symmetrical, makes

conductive member

22,23 be preferably annular.Non-conductive core components 21 and ring the 22, the 23rd, actionless, make the first and

second plate member

24,25 to rotate with respect to conductive hoop 22,23.Like this, ring portion 22 provides and is electrically connected to respectively with the relative surface of plate member 24 with relative surface and the ring portion 23 of plate member 25 between

stationary part

22,23 and pivotable parts 24,25.Interface surface between these current-carrying parts is relatively large, makes a large amount of electric power to transmit during adding the Hot-air fan

rotation.Plate member

24,25 is provided with the copper layer to guarantee to have the electric conductivity of as far as possible little resistance.

Blade part

24,25 is for example promoted each other by spring assembly (not shown) court.

Electric power offers

ring portion

22,23 by the

electrical lead

26,27 with contrary polarity.

In much household power equipment, the value of electric power/power that the single socket of safety fuse cutout meeting restricted passage transmits.In these cases, usually use current collector as shown in Figure 3 get final product because limit available power value neither blade 6 neither current collector, but household power equipment.

Power equipment can provide more power in other cases, in these equipment, may wish to use the three-phase electricity connector with current collector, and this current collector can be from this three-phase equipment transmitted power.This current collector as shown in Figure 4.Current collector shown in Fig. 4 comprises all elements of current collector shown in Fig. 3, but has other one group of

conductive member

28,29, makes each electric phase place have special conductive member with for power is delivered to rotating part from stationary part.

Certainly, the quantity of the blade in any fan structure can be installed according to individual demand.Simultaneously, while connecting fan within the scope of the invention, in the case of without departing from the principles of the present invention, can use the electrical connection type of series, parallel or its combination.

Obviously, based on to being arranged on heating element 16 on blade 6, providing the quantity of the required electrical lead of power, current collector can be expanded to cover other conduction and non-conductive components in groups.

Claims

1. one kind adds Hot-air fan, wherein said fan comprises for described fan being fastened to the securing means of first surface, this securing means is connected to the bar of hub section, wherein said hub section comprises motor unit, this motor unit makes a plurality of fan wing rotations, the described fan wing radially extends from described hub section, thereby the described fan wing has upper surface and lower surface, it is characterized in that, each fan wing has leading edge and trailing edge, define upper surface and lower surface between described leading edge and trailing edge, wherein, at least one fan wing has Electric heating appliance integrated with described upper surface or that be connected, the length at least over half of described leading edge and/or trailing edge is with respect to the surface curvature of the fan wing.

2. the Hot-air fan that adds according to claim 1, it is characterized in that, radially extending on vertical cross section of the described fan wing with respect to described hub section, the fan wing contour comprises section's section of three different substantially linears,, from leading edge extend 5-25mm the first linear portion section, extend the second linear portion section of 5-25mm and be located at the 3rd linear portion section between described first and second sections from trailing edge, wherein said the 3rd linear portion section has the length of 35-110mm, and described the first and second linear portion sections become the angle of 5 °-60 ° with respect to described the 3rd section.

3. the Hot-air fan that adds according to claim 1 and 2, wherein, described heating equipment is provided by metal lead wire, this metal lead wire has about 40 Ω or larger Ohmic resistance, wherein said metal lead wire embeds in thick heat distribution rete, and this rete is preferably the dielectric composition with 50 microns or larger layer thickness.

4. the Hot-air fan that adds according to claim 3, is characterized in that, described heating equipment is selected from the material with positive temperature coefficient.

5. the Hot-air fan that adds according to claim 1, it is characterized in that, described hub section comprises current collector, this current collector is delivered at least one heating element at least one being arranged on described a plurality of fan wing by electric power from described bar/hub section, wherein this current collector comprises the non-conductive parts in center, the at least the first conductive member and the second conductive member be non-conductive parts setting around this center, non-conductive device is arranged between described the first and second conductive members, and the first and second impeller assemblys are set to and the first and second conductive members difference conductive contacts, wherein said the first and second impeller assemblys comprise for the device with being arranged on the described heating equipment conduction of fan on the wing and being connected.

6. the Hot-air fan that adds according to claim 5, it is characterized in that, described the first and second conductive members ringwise, have conductive surface radially, and the direction that wherein said the first and second impeller assemblys contact respectively towards the conductive surface with the first and second conductive members is biased.

7. the Hot-air fan that adds according to claim 1, it is characterized in that, described hub section comprises current collector, this current collector is delivered at least one heating element at least one being arranged on described a plurality of fan wing by electric power from described bar/hub section, wherein this current collector comprises the non-conductive parts in center, n conductive member non-conductive parts setting around described center, non-conductive device is arranged between a described n conductive member, and n conductive vanes device is arranged to and described n conductive member conductive contact, make a conductive member and a conductive vanes parts conductive contact, wherein said impeller assembly comprises for the device with being arranged on the described heating equipment conduction of fan on the wing and being connected, wherein n is the numeral between 2-9, be preferably 3.

8. according to claim 5 or the 6 or 7 described Hot-air fans that add, it is characterized in that, the non-conductive parts in described center are about the central axis symmetry, and described non-conductive device and described central module are integral, and electrical lead can be arranged in the non-conductive parts in described center and with conductive member and electrically contacts.

9. according to the described Hot-air fan that adds of aforementioned any one claim, it is characterized in that, the surface of described blade also is provided with the device for increasing the roughness of blade surface, to produce more turbulent flows.

10. one kind for the blade according to the described fan of claim 1-9 any one, it is characterized in that, described blade has front surface and rear surface, two side margin, inward flange and outward edges, wherein said inward flange is suitable for being arranged in the hub section of fan, described blade is made by ferrite material, be provided with the conductive resistance lead-in wire on front surface, described lead-in wire has electrical connector, the dielectric layer of at least 50 microns is arranged on front surface and covers the very most of of described front surface, and described surface bends to beyond the basic plane on described surface along side margin.