EP2808616A1 - Fan heater - Google Patents
Fan heater Download PDFInfo
- Publication number
- EP2808616A1 EP2808616A1 EP13193510.8A EP13193510A EP2808616A1 EP 2808616 A1 EP2808616 A1 EP 2808616A1 EP 13193510 A EP13193510 A EP 13193510A EP 2808616 A1 EP2808616 A1 EP 2808616A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- air
- fan heater
- heating
- heating elements
- 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- Withdrawn
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Classifications
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- 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
- F24H3/0417—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 portable or mobile
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/08—Electric heater
Definitions
- the invention concerns a fan heater for temporary heating of a building site, including a fan, for transporting air through the fan heater from an inlet to an outlet, and at least one heating element for heating the air passing through the fan heater.
- Heating of spaces during building is often necessary, especially before the permanent arrangements for heating, such as radiators and the like, have been installed.
- the benefits of heating are several.
- the comfort and working conditions of the workers on the building site will improve.
- the necessary conditions for using certain building materials, such as paints, glues etc. will be ensured.
- the humidity in the recently cast concrete or recently applied mortar, cement or plaster will also be reduced by heating the space, thus preparing it for further steps in the building process or interior decoration.
- Fan heaters are among the most common. In general the function thereof is as follows. Cool air is drawn into the heater by a fan. The air passes by heating elements, which are arranged downstream of the fan, and its temperature is thereby increased, before the air is expelled by the action of the fan.
- both the fan and the heating elements must have a large capacity.
- this desired effect results in a bulky construction, especially in the axial direction of the fan, which coincides with the air stream through the fan heater, since both the size and number of heating elements arranged downstream of the fan are increased.
- a suitable temperature of the casing is determined by acceptable temperatures in order to avoid risks of burn injuries to humans and of fire hazards. The temperature restrictions also tend to make the fan heaters bulky, since the volume needs to be increased in proportion to the power increase in order to keep the outside surfaces at an acceptable temperature.
- the present invention has for its object to attain a fan heater with a large power output, while its size and the temperature of its outer surfaces are limited.
- the fan heater referred to initially is characterized in that the fan is a cylindrical fan and that the heating element is arranged to envelop the cylindrical fan at least partially.
- FIG. 1 shows an overview of a fan heater 1 according to the invention.
- the fan heater 1 has an inlet 2 for cool air on its side turned away from the viewer and an outlet 3 for heated air arranged on top of the fan heater 1.
- the outlet 3 is designed to distribute the air in different directions, but it is not essential for the invention, and could be replaced by any other outlet known in the art, as long as it is able to withstand the temperature of the heated air.
- the fan heater For the ease of transporting the fan heater, it is provided with castor wheels 4 and a handle bar 5 so that it may be steered in any direction manually.
- the handle bar 5 is preferably made in a material which has a high heat capacity, i. e. its temperature will remain reasonably low despite long-term use of the fan heater, so that it may be touched without the risk of burning.
- connection device 6 which may be connected to a suitable electrical outlet.
- the connection device 6 should conform to the standards which are applicable on the markets where the fan heater 1 is sold, and hence many variations thereof are possible.
- the fan heater 1 is designed for a considerable electrical power, yet its design is notably compact, in relation to the output power.
- the fan heater 1 is viewed from its opposite side, with the air inlet 2 facing the viewer.
- An external filter of conventional design has been removed from the inlet side of the fan heater. The purpose of the external filter is to prevent dust and debris from being sucked into the fan heater 1, which could damage the internal parts of the fan heater 1, at least in large amounts. Another advantage is that the working environment on the building site will improve, since the filter will trap the dust and keep it from whirling around in the air.
- FIG. 2 reveals that an inner grille 7 is arranged in front of a fan 8 inside the fan heater 1. There is an approximately circular opening 9, through which the blades 10 of the fan 8 are visible. The fan 8 draws air into the fan heater 1, and transports it through the fan heater to the outlet 3.
- the fan 8 is a cylindrical fan, the blades 10 of which rotate around a central axis 11.
- the air is drawn into the fan 8 from one end of the cylinder constituting the outer shape of the fan 8, in an axial direction, approximately parallel with the central axis 11 of rotation.
- the blades 10 of the fan 8 are angled so that they direct the air in a radial direction from the central axis 11. The air will be let out from the fan 8 through the envelope surface of the cylinder circumscribing the fan 8.
- the high speed of rotation of the fan 8 will increase the pressure of the air in the chamber 15 of the fan 8.
- the air with increased pressure will move radially outwards from the fan 8, to be heated before it exits through the outlet 3.
- the diameter of the fan 8 is of the same magnitude as its axial length.
- the outlet of air is distributed over the axial length of the fan 8.
- FIG. 3 The schematic side view of figure 3 gives a better overview of the cylindrical fan 8, which is seen from the side in this view.
- the outer side plate of the casing and one inner guiding plate have been removed from the drawing for clarity.
- a number of heating elements 12 are also seen from the side, arranged around at least a part of the envelope of the cylindrical fan 8. As air is let out from the fan 8 radially, it will move past the heating elements, and will be heated to a high temperature.
- the heating elements 12 are distributed along the cylindrical fan 8, thus ensuring a reasonably even and efficient heating of the air.
- the interior space of the fan heater 1 is used efficiently, and the heating elements 12 do not add to the axial length of the fan heater, as they are arranged on the outside of the cylindrical fan 8 in its radial direction.
- the heating elements 12 in the preferred embodiment have the general shape of a U, with the shanks of the U electrically connected at the bottom.
- the rounded part of the U is arranged around the cylindrical fan 8 on its outside, so that the air expelled from the fan 8 has to pass the heating elements 12. Since the heating elements 12 follow the outer shape of the fan 8, the additional space needed for the heating elements 12 in the radial direction of the fan 8 is minimal.
- heating elements 12 Since there are several heating elements 12 arranged in the axial direction of the cylindrical fan 8, the space around the fan 8 is also used efficiently for heating the air coming out from the fan 8.
- the heating elements 12 are approximately uniformly arranged across the outer envelope surface of the cylindrical fan 8 in the axial direction.
- heating elements 12 there are several layers of heating elements 12 arranged in the radial direction of the cylindrical fan 8. This is difficult to see in figure 3 , but will be apparent from figure 4 . In this way the air from the fan 8 will pass by a number of heating elements 12, before it reaches the outlet 3. The increased number of heating elements 12 will further increase the turbulence in the airflow from the fan 8, thereby further increasing the contact of the air with the heating elements 12 an further increasing the efficiency of the heating of the air. In other words there will be an increased heating power.
- Figure 4 shows a detail view of the heating elements 12 surrounding the cylindrical fan 8.
- two guiding plates 13 are arranged on either side of the heating elements 12. Between the two guiding plates 13 and above the heating elements 12, the diffusor 14 is clearly visible.
- the heating elements 12 are U-shaped and arranged in several rows in the axial direction and in several layers in the radial direction.
- the outermost heating elements 12 have a longer radius of curvature than the inner heating elements 12, and their radii of curvature are gradually less, with the innermost heating elements 12 having the least radius of curvature.
- the innermost heating elements 12 closely follow the curvature of at least half of the circumference of the cylindrical fan 8.
- All the heating elements 12 have their electrical connections at the bottom, which means that the provision of electrical wires in the fan heater 1 will be simplified.
- the guiding plates 13 serve to guide the air flow from the fan 8 towards the outlet 3.
- the guiding plates 13 also deflect the air flow from the side plates of the casing, thereby keeping them as cool as possible.
- the material of the guiding plates 13 may in some embodiments be able to reflect the heat inwards.
- a layer of insulation may also be provided between the guiding plates 13 and the outer side plates.
- the provision of the guiding plates 13 will make sure that the air flow is directed upwards eventually. Air which is deflected back towards the heating elements 12 by the guiding plates 13, will be heated further, and will thereby have an increased tendency to rise towards the outlet 3.
- Air moving upwards from the fan 8 will first pass and be heated by the heating elements 12, and its turbulence will be increased thereby. Some of the air will be deflected by the guiding plates 13, as described, and will be heated further. Air rising straight upwards, after passing the heating elements 12 at least once, will encounter the diffusor 14, and will be directed either back to the heating elements 12, directly or via the guiding plates 13, or to the sides, where it passes between the diffusor 14 and the guiding plates 13. In both cases its turbulence will increase, while its velocity of flow decreases.
- a small outlet 16 from the fan chamber 15 is arranged for drawing as cool air as possible from the fan chamber 15.
- the air in the fan chamber 15 is coolest at the bottom for at least two reasons.
- the heating elements 12 are arranged as a U with the shanks thereof directed downwards.
- the outlet 16 from the fan chamber 15 is preferably arranged at as long a distance as possible from either shank.
- heated air tends to rise upwards, and the coolest air in the fan chamber 15 will be found at the bottom thereof.
- a thin pipe 17 extends from the outlet 16 from the fan chamber 15 to a box 18 with electronic components, such as fuses, circuit cards, etc.
- the box 18 is arranged at the back of the fan heater 1, i. e. at the side opposite the air inlet 2.
- the pipe 17 leads cool air from the outlet 16 from the fan chamber 15 into the box 18, so that the air will cool the electronic components and keep them from being overheated. Since the air from the outlet 16 from the fan chamber 15 is pressurized to a certain extent, the direction of flow is naturally from the outlet 16 from the fan chamber 15 and into the box 18. In the box 18, the ambient pressure will prevail, and hot air will be discharged from the box 18 through suitably arranged vent holes 19 or slits. At the same time, dust will be blown from the components, keeping them clean and maximizing their life span.
- the air from the pipe 17 has passed through the filter at the air inlet 2 before it entered the fan chamber 15, and will contain less dust and debris than the ambient air.
- U-shaped heating elements 12 have been used. They may be replaced by heating elements with other shapes, more or less circumscribing the cylindrical fan, e. g. ⁇ -shaped elements, spirals, or loops.
- heating elements 12 for covering the majority of the axial length of the cylindrical fan 8 are envisaged, such as arranging the heating elements 12 in a zig-zag pattern across the envelope surface.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
Abstract
A fan heater (1) for temporary heating of a building site includes a fan for transporting air through the fan heater (1) from an inlet to an outlet (3). At least one heating element is arranged for heating the air passing through the fan heater (1). Cool air from the fan chamber (15) is led to a space (18) accommodating electronic components, for cooling the electronic components.
Description
- The invention concerns a fan heater for temporary heating of a building site, including a fan, for transporting air through the fan heater from an inlet to an outlet, and at least one heating element for heating the air passing through the fan heater.
- Heating of spaces during building is often necessary, especially before the permanent arrangements for heating, such as radiators and the like, have been installed. The benefits of heating are several. The comfort and working conditions of the workers on the building site will improve. The necessary conditions for using certain building materials, such as paints, glues etc. will be ensured. The humidity in the recently cast concrete or recently applied mortar, cement or plaster will also be reduced by heating the space, thus preparing it for further steps in the building process or interior decoration.
- There exist a vast number of heating arrangements of various types for building sites. Fan heaters are among the most common. In general the function thereof is as follows. Cool air is drawn into the heater by a fan. The air passes by heating elements, which are arranged downstream of the fan, and its temperature is thereby increased, before the air is expelled by the action of the fan.
- In order to accomplish a high heating effect, both the fan and the heating elements must have a large capacity. However, this desired effect results in a bulky construction, especially in the axial direction of the fan, which coincides with the air stream through the fan heater, since both the size and number of heating elements arranged downstream of the fan are increased.
- Another consideration is that the outside surface of the fan heater must not be too hot. A suitable temperature of the casing is determined by acceptable temperatures in order to avoid risks of burn injuries to humans and of fire hazards. The temperature restrictions also tend to make the fan heaters bulky, since the volume needs to be increased in proportion to the power increase in order to keep the outside surfaces at an acceptable temperature.
- Yet another consideration is that some of the electrical components included in the heater must not be too hot in order to work properly. An excessive temperature may damage these components or cause them to malfunction, even after a relatively brief exposure if the temperature is very high, or the life span of the components may be considerably shortened. Also, some of the components will themselves generate some heat. On a large heater, the electrical components may be placed at a distance from the hottest part of the heater, but on more compact heaters the space may be limited, which could be a problem from this point of view.
- While it would not be particularly difficult to make larger fan heaters, such heaters are difficult to handle and use. A fan heater which is too large and heavy to carry manually could be supplied with castors for rolling the heater, but it will still have to be able to pass through doorways and narrow passages, as well as be able to turn around corners where space is limited.
- The present invention has for its object to attain a fan heater with a large power output, while its size and the temperature of its outer surfaces are limited.
- The object forming the basis of the present invention will be attained if the fan heater referred to initially is characterized in that the fan is a cylindrical fan and that the heating element is arranged to envelop the cylindrical fan at least partially.
- Further advantages will be apparent from the dependent claims.
- The present invention will now be described in greater detail hereinbelow, with reference to the accompanying drawings. In the accompanying drawings:
-
Fig 1 shows a perspective view of a fan heater according to the invention; -
Fig 2 shows a perspective view of the fan heater from the opposite side; -
Fig 3 is a schematic side view of the fan heater, where an outer side panel and an inner guiding plate have been removed; -
Fig 4 is a perspective view of heating elements and guiding plates included in the fan heater according to the invention; and -
Fig 5 is a perspective view of the side of the fan heater shown infig 1 , where the outer casing has been cut away. -
Figure 1 shows an overview of afan heater 1 according to the invention. Thefan heater 1 has aninlet 2 for cool air on its side turned away from the viewer and anoutlet 3 for heated air arranged on top of thefan heater 1. Theoutlet 3 is designed to distribute the air in different directions, but it is not essential for the invention, and could be replaced by any other outlet known in the art, as long as it is able to withstand the temperature of the heated air. - For the ease of transporting the fan heater, it is provided with
castor wheels 4 and ahandle bar 5 so that it may be steered in any direction manually. For the ease of handling and using thefan heater 1, one or more of thecastors 4 is lockable. Also, thehandle bar 5 is preferably made in a material which has a high heat capacity, i. e. its temperature will remain reasonably low despite long-term use of the fan heater, so that it may be touched without the risk of burning. - Next to the
handle bar 5 there is anelectrical connection device 6, which may be connected to a suitable electrical outlet. Theconnection device 6 should conform to the standards which are applicable on the markets where thefan heater 1 is sold, and hence many variations thereof are possible. Thefan heater 1 is designed for a considerable electrical power, yet its design is notably compact, in relation to the output power. - In
figure 2 , thefan heater 1 is viewed from its opposite side, with theair inlet 2 facing the viewer. An external filter of conventional design has been removed from the inlet side of the fan heater. The purpose of the external filter is to prevent dust and debris from being sucked into thefan heater 1, which could damage the internal parts of thefan heater 1, at least in large amounts. Another advantage is that the working environment on the building site will improve, since the filter will trap the dust and keep it from whirling around in the air. -
Figure 2 reveals that aninner grille 7 is arranged in front of afan 8 inside thefan heater 1. There is an approximatelycircular opening 9, through which theblades 10 of thefan 8 are visible. Thefan 8 draws air into thefan heater 1, and transports it through the fan heater to theoutlet 3. - The
fan 8 is a cylindrical fan, theblades 10 of which rotate around acentral axis 11. The air is drawn into thefan 8 from one end of the cylinder constituting the outer shape of thefan 8, in an axial direction, approximately parallel with thecentral axis 11 of rotation. Theblades 10 of thefan 8 are angled so that they direct the air in a radial direction from thecentral axis 11. The air will be let out from thefan 8 through the envelope surface of the cylinder circumscribing thefan 8. - The high speed of rotation of the
fan 8 will increase the pressure of the air in thechamber 15 of thefan 8. The air with increased pressure will move radially outwards from thefan 8, to be heated before it exits through theoutlet 3. - In the preferred embodiment, the diameter of the
fan 8 is of the same magnitude as its axial length. The outlet of air is distributed over the axial length of thefan 8. - The schematic side view of
figure 3 gives a better overview of thecylindrical fan 8, which is seen from the side in this view. The outer side plate of the casing and one inner guiding plate have been removed from the drawing for clarity. A number ofheating elements 12 are also seen from the side, arranged around at least a part of the envelope of thecylindrical fan 8. As air is let out from thefan 8 radially, it will move past the heating elements, and will be heated to a high temperature. Theheating elements 12 are distributed along thecylindrical fan 8, thus ensuring a reasonably even and efficient heating of the air. At the same time, the interior space of thefan heater 1 is used efficiently, and theheating elements 12 do not add to the axial length of the fan heater, as they are arranged on the outside of thecylindrical fan 8 in its radial direction. - The
heating elements 12 in the preferred embodiment have the general shape of a U, with the shanks of the U electrically connected at the bottom. The rounded part of the U is arranged around thecylindrical fan 8 on its outside, so that the air expelled from thefan 8 has to pass theheating elements 12. Since theheating elements 12 follow the outer shape of thefan 8, the additional space needed for theheating elements 12 in the radial direction of thefan 8 is minimal. - Since there are
several heating elements 12 arranged in the axial direction of thecylindrical fan 8, the space around thefan 8 is also used efficiently for heating the air coming out from thefan 8. Theheating elements 12 are approximately uniformly arranged across the outer envelope surface of thecylindrical fan 8 in the axial direction. - Another aspect of the arrangement of the
heating elements 12 is that there are several layers ofheating elements 12 arranged in the radial direction of thecylindrical fan 8. This is difficult to see infigure 3 , but will be apparent fromfigure 4 . In this way the air from thefan 8 will pass by a number ofheating elements 12, before it reaches theoutlet 3. The increased number ofheating elements 12 will further increase the turbulence in the airflow from thefan 8, thereby further increasing the contact of the air with theheating elements 12 an further increasing the efficiency of the heating of the air. In other words there will be an increased heating power. - To this effect, there is also arranged a
diffusor 14 above theheating elements 12 and between the two guidingplates 13, whereof one plate is removed from the drawing for clarity. -
Figure 4 shows a detail view of theheating elements 12 surrounding thecylindrical fan 8. In the figure two guidingplates 13 are arranged on either side of theheating elements 12. Between the two guidingplates 13 and above theheating elements 12, thediffusor 14 is clearly visible. - In
figure 4 it is clear that theheating elements 12 are U-shaped and arranged in several rows in the axial direction and in several layers in the radial direction. Theoutermost heating elements 12 have a longer radius of curvature than theinner heating elements 12, and their radii of curvature are gradually less, with theinnermost heating elements 12 having the least radius of curvature. Theinnermost heating elements 12 closely follow the curvature of at least half of the circumference of thecylindrical fan 8. - All the
heating elements 12 have their electrical connections at the bottom, which means that the provision of electrical wires in thefan heater 1 will be simplified. - On both sides of the
heating elements 12 there are guidingplates 13, as briefly mentioned above. The guidingplates 13 serve to guide the air flow from thefan 8 towards theoutlet 3. The guidingplates 13 also deflect the air flow from the side plates of the casing, thereby keeping them as cool as possible. The material of the guidingplates 13 may in some embodiments be able to reflect the heat inwards. In some embodiments, a layer of insulation may also be provided between the guidingplates 13 and the outer side plates. - Although some of the air expelled from the cylindrical fan is initially not directed towards the
outlet 3, the provision of the guidingplates 13 will make sure that the air flow is directed upwards eventually. Air which is deflected back towards theheating elements 12 by the guidingplates 13, will be heated further, and will thereby have an increased tendency to rise towards theoutlet 3. - Air moving upwards from the
fan 8 will first pass and be heated by theheating elements 12, and its turbulence will be increased thereby. Some of the air will be deflected by the guidingplates 13, as described, and will be heated further. Air rising straight upwards, after passing theheating elements 12 at least once, will encounter thediffusor 14, and will be directed either back to theheating elements 12, directly or via the guidingplates 13, or to the sides, where it passes between thediffusor 14 and the guidingplates 13. In both cases its turbulence will increase, while its velocity of flow decreases. - The arrangement of the
heating elements 12 around thefan 8 and the arrangement of the guidingplates 13 and thediffusor 14, to direct the air flow, cooperate to realize thecompact fan heater 1 with a high heating power. - As may be seen in
fig 5 , at the very bottom in the fan chamber 15 (cf.fig 3 ), asmall outlet 16 from thefan chamber 15 is arranged for drawing as cool air as possible from thefan chamber 15. The air in thefan chamber 15 is coolest at the bottom for at least two reasons. First, theheating elements 12 are arranged as a U with the shanks thereof directed downwards. Theoutlet 16 from thefan chamber 15 is preferably arranged at as long a distance as possible from either shank. Secondly, heated air tends to rise upwards, and the coolest air in thefan chamber 15 will be found at the bottom thereof. - A
thin pipe 17 extends from theoutlet 16 from thefan chamber 15 to abox 18 with electronic components, such as fuses, circuit cards, etc. In the preferred embodiment thebox 18 is arranged at the back of thefan heater 1, i. e. at the side opposite theair inlet 2. - The
pipe 17 leads cool air from theoutlet 16 from thefan chamber 15 into thebox 18, so that the air will cool the electronic components and keep them from being overheated. Since the air from theoutlet 16 from thefan chamber 15 is pressurized to a certain extent, the direction of flow is naturally from theoutlet 16 from thefan chamber 15 and into thebox 18. In thebox 18, the ambient pressure will prevail, and hot air will be discharged from thebox 18 through suitably arranged vent holes 19 or slits. At the same time, dust will be blown from the components, keeping them clean and maximizing their life span. The air from thepipe 17 has passed through the filter at theair inlet 2 before it entered thefan chamber 15, and will contain less dust and debris than the ambient air. - While the embodiment shown in the drawings has a particular type of
outlet 3, its shape is not essential for the invention. Any other type of outlet arrangement may be used, but an outlet arranged on the upper part of the fan heater will be preferred, in order to make the best use of the effects from heated air rising upwards. - In the preferred embodiment,
U-shaped heating elements 12 have been used. They may be replaced by heating elements with other shapes, more or less circumscribing the cylindrical fan, e. g. Ω-shaped elements, spirals, or loops. - Other arrangements of the
heating elements 12, for covering the majority of the axial length of thecylindrical fan 8, are envisaged, such as arranging theheating elements 12 in a zig-zag pattern across the envelope surface. - The invention may be further modified within the scope of the appended claims.
Claims (8)
- Fan heater for temporary heating of a building site, including a fan (8) in a fan chamber (15), for transporting air through the fan heater (1) from an inlet (2) to an outlet (3), and at least one heating element (12) for heating the air passing through the fan heater (1), characterized in that cool air from the fan chamber (15) is led to a space (18) accommodating electronic components, for cooling the electronic components.
- Fan heater according to claim 1, characterized in that a pipe (17) extends from an outlet (16) in the fan chamber (15) to a box (18) for electronic components arranged on the fan heater (1).
- Fan heater according to claim 1 or claim 2, characterized in that the space or box (18) is provided with vent holes (19) for a discharge of air.
- Fan heater according to any of claims 1 to 3, characterized in that the fan (8) is a cylindrical fan and that the heating element (12) is arranged to envelop the cylindrical fan (8) at least partially.
- Fan heater according to claim 4, characterized in that the fan (8) expels air around its envelope surface.
- Fan heater according to any of claims 1 to 5, characterized in that the fan (8) is arranged in an outer casing and that guiding plates (13) are arranged between the heating element (8) and the outer casing.
- Fan heater according to claim 4, characterized in that the heating elements (12) are arranged to extend in the axial direction of the cylindrical fan (8), as well as in the circumferential direction.
- Fan heater according to claim 4, characterized in that the heating element (12) extends along approximately half of the circumference of the cylindrical fan (8).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13193510.8A EP2808616A1 (en) | 2013-04-12 | 2013-11-19 | Fan heater |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13163540.1A EP2789926B1 (en) | 2013-04-12 | 2013-04-12 | Fan heater |
EP13193510.8A EP2808616A1 (en) | 2013-04-12 | 2013-11-19 | Fan heater |
Publications (1)
Publication Number | Publication Date |
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EP2808616A1 true EP2808616A1 (en) | 2014-12-03 |
Family
ID=48128127
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13163540.1A Active EP2789926B1 (en) | 2013-04-12 | 2013-04-12 | Fan heater |
EP13193510.8A Withdrawn EP2808616A1 (en) | 2013-04-12 | 2013-11-19 | Fan heater |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13163540.1A Active EP2789926B1 (en) | 2013-04-12 | 2013-04-12 | Fan heater |
Country Status (3)
Country | Link |
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EP (2) | EP2789926B1 (en) |
DK (1) | DK2789926T3 (en) |
LT (1) | LT2789926T (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115003966A (en) * | 2019-11-28 | 2022-09-02 | Lg电子株式会社 | Air conditioner |
DE102019008639A1 (en) * | 2019-12-13 | 2021-06-17 | Trotec Gmbh | Fan attachment for a device for room temperature control and / or room ventilation as well as a correspondingly equipped device |
EP3882738B1 (en) | 2020-03-18 | 2023-04-12 | EL-Björn AB | Method and system for temporary supply of energy to buildings |
DE102020001913A1 (en) | 2020-03-24 | 2021-09-30 | Trotec Gmbh | Turbo machine as well as control for and use of a turbo machine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2852657A (en) * | 1957-08-01 | 1958-09-16 | Markel Electric Products Inc | Heater |
US5437001A (en) * | 1992-12-21 | 1995-07-25 | The W. B. Marvin Manufacturing Company | Upright radiant electric heating appliance |
US20120308214A1 (en) * | 2011-06-01 | 2012-12-06 | Suarez Corporation Industries | Portable air conditioning apparatus |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2675460A (en) * | 1953-05-05 | 1954-04-13 | Jr Mark H Winner | Air heater |
US3525851A (en) * | 1967-12-28 | 1970-08-25 | Rfl Ind Inc | Electric-cyclonic hot air furnace |
US3865182A (en) * | 1973-08-30 | 1975-02-11 | Coleman Company | Combination air conditioner and heater |
DE4330878A1 (en) * | 1993-09-13 | 1995-03-16 | Petz Elektro Waerme Techn | Fan heater |
US7500760B2 (en) * | 2007-03-04 | 2009-03-10 | Hunter Fan Company | Light with heater |
-
2013
- 2013-04-12 DK DK13163540.1T patent/DK2789926T3/en active
- 2013-04-12 LT LTEP13163540.1T patent/LT2789926T/en unknown
- 2013-04-12 EP EP13163540.1A patent/EP2789926B1/en active Active
- 2013-11-19 EP EP13193510.8A patent/EP2808616A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2852657A (en) * | 1957-08-01 | 1958-09-16 | Markel Electric Products Inc | Heater |
US5437001A (en) * | 1992-12-21 | 1995-07-25 | The W. B. Marvin Manufacturing Company | Upright radiant electric heating appliance |
US20120308214A1 (en) * | 2011-06-01 | 2012-12-06 | Suarez Corporation Industries | Portable air conditioning apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP2789926A1 (en) | 2014-10-15 |
LT2789926T (en) | 2019-09-25 |
EP2789926B1 (en) | 2019-06-05 |
DK2789926T3 (en) | 2019-08-26 |
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