DE102011110200A1 - Heating device used for heating ambient air in foot or bottom portion under desk installed in e.g. terrace, has upper housing portion, and upper cover arranged at upper housing portion between which air is passed - Google Patents

Abstract

The heating device (1) has a heating portion and a hollow portion with upper and lower openings. A channel is formed between the openings. An upper planar housing portion (8) is arranged at the region of upper opening of the hollow portion, such that the upper opening of the hollow portion is remained in a free state. Air flow is set between the upper housing portion and the upper cover (9) arranged at the upper housing portion, and the upper opening of the hollow portion is extended along outward direction.

Description

The present invention relates to a heating device for heating the ambient air. It is particularly possible to heat the air in the foot or floor area, for example, under a table.

A comfortable and comfortable stay outside is no longer or not possible for a long time from a certain outside temperature. In particular, when you spend a long time sitting outside, for example on the terrace or in the outdoor catering, so that you do not move much, you will feel cold or even cold.

Often attempts are made to protect against cooling down with blankets to allow for a longer stay outdoors. However, this usually helps only conditionally and only for a short time, since the legs, at least the lower legs and the feet, are often not warmed up by the ceiling.

Even radiant heaters or so-called heated mushrooms usually can not do much against this cold feet, because they spend the heat from above down, causing the warm air flies quickly and does not get into the bottom well. Just the cold of the feet can quickly cool you down and make you shiver. The area under a table, for example, will only be poor if ever achieved by heated mushrooms.

Furthermore, these heated mushrooms often do not work very effectively, since they usually have a very high gas and / or electricity consumption, which causes a relatively low heat output. A significant proportion of the heat produced flies or does not reach the desired sites of action.

Although hot spotlights have become known which can also be placed under a table, for example, these often have the disadvantage that they become very hot. This may result in a significant risk of injury, even for example, dogs and a risk that damage clothing or footwear.

It is therefore the object of the present invention to provide a heating device which allows adequate heating, in particular of his and / or feet, without becoming too hot on the outside.

This object is achieved by a heating device with the features of claim 1. Preferred developments of the invention are the subject of the dependent claims. Further advantages and features of the invention will become apparent from the embodiments.

The heating device according to the invention comprises at least one heating device and at least one hollow body with at least one upper and at least one lower opening. At least one channel is formed between the openings. In this case, at least one upper flat housing part is provided in the region of the upper opening of the hollow body, such that the upper opening of the hollow body remains at least partially free. Furthermore, the upper housing part is assigned at least one upper cover device arranged at least in sections above it. This defines at least one air-permeable upper region between the upper housing part and the upper cover device, which extends from the upper opening of the hollow body to the outside.

In this case, the upper area between the upper cover plate and the upper housing part preferably extends substantially radially outwards, whereby a non-straight extension from the upper opening to the outside may also be advantageous.

The hollow body can be provided in particular by a tube or a core cylinder. In this case, a height of the hollow body of about 100 mm and a diameter of about 100 mm may be advantageous. Other dimensions may be useful or appropriate depending on the design.

Preferably, the housing part has a corresponding to the opening of the hollow body recess, or a hole. This can ensure that air can flow out of the channel through the opening of the hollow body.

Suitably, at least partially metal, preferably aluminum is used for the device. Other materials that have the necessary properties can be used advantageously. However, attention should be paid to heat resistance, especially of the materials directly exposed to the heat produced by the heaters.

The distance between the covering device and the upper flat housing part can be chosen to be different depending on the application. An advantage of a heater having a diameter of about 340 mm and a height of the hollow body of about 100 mm, a distance between the cover and the upper housing part of about 20 mm.

Other distances are conceivable and can be advantageous. In particular, the heating device can also be provided in a wide variety of sizes. For example, sizes are between 60- 100 mm appropriate to get enough space under the table.

The device according to the invention has many advantages. A significant advantage is that the special arrangement of the upper housing part at the upper opening of the hollow body and the top cover arranged above provide an effective cooling system. In any case, even if the heating device inside becomes very hot in order to achieve a sufficient heat output, the covering device in any case remains so cool that a risk of burning or injury is avoided.

Cool air is drawn through the channel of the hollow body in the upper region between the upper housing part and the upper cover, whereby the upper cover device is sufficiently cooled. Depending on the distance between the housing part and cover and depending on the height and diameter of the hollow body different cooling properties can be achieved.

In addition, since the heating device according to the invention is particularly suitable for heating the feet and legs and thereby for use under a table, the heater according to the invention operates very energy efficient, since it creates a kind of microclimate under the table, which consumes much less energy than the Heating the entire environment, as is the case, for example, with a heated mushroom.

A particular advantage of the heating device according to the invention lies in the combination of convection and radiation. In particular, the convection also warms up the lower area down to the floor, so that the feet, shoes and lower legs are heated as well. Unpleasant cold feet are so reliably avoided. Another advantage of the heating device according to the invention consists in the heat radiation, which is limited by the covering to a certain height range in particular to about knee height. Uncovered lower legs are heated very effectively and quickly by direct heat radiation. Dressed lower legs are heated in particular by the convection. The combination of angular heat radiation and the radial air movement generated radially around the heater allows a very effective and energy-saving heating of the surrounding environment, for example under a table.

At least one lower, flat housing part is preferably provided in the region of the lower opening of the hollow body, such that the lower opening of the hollow body remains at least partially free. In this way, in particular, it is achieved that cooler air from the edge region of the device can be guided through the channel of the hollow body and through the upper region. As a result, we achieved a particularly effective cooling of the outer cover of the heater.

Particularly preferably, the at least one lower housing part is assigned at least one lower cover device arranged at least in sections underneath. This defines an air-permeable lower portion between the lower housing part and the lower cover means, which extends from the lower opening of the hollow body to the outside and communicates via the channel of the hollow body with the upper region.

The use of a lower covering device makes it possible, inter alia, to provide a portable or mobile heating device. By the lower cover means and the lower side of the heater is sufficiently cooled by the drawn through the lower portion of air. This allows the heater to be placed well on more sensitive floor coverings.

In this case, the lower cover device and / or the lower housing part preferably have a passage, which allows passage of lines to the heater.

In preferred embodiments, at least one covering device is accommodated on at least one housing part. Thereby, a simple and inexpensive construction of the heater is possible, since the housing part serves as a holding device for the covering. In this case, a cover, for example, be attached to the housing part with screws. Then, the use of spacers may be helpful to allow a spaced attachment of the cover and also ensure a defined distance.

Advantageously, the at least one heating device is designed as a heating cable, heating element, gas burner and / or filament or the like. It is preferred that the at least one heating device is accommodated on the lower housing part. Particularly preferably, the heating device is arranged at least in sections around the hollow body. As a result, a particularly uniform and also substantially radial heat radiation can be achieved. The radiator may be located at different heights in the heater.

In other preferred embodiments, at least one housing part and / or at least one cover device is designed as a plate, as a disk or cup-shaped. It is in particular a shell shape similar to a Frisbee disc advantageous. However, it should be noted that non-circular shapes, such as oval, square or meandering shapes are possible and can be used appropriately depending on the design.

In order to make the heater particularly stable, the hollow body is preferably made in one piece with at least one housing part or connected thereto. This creates a stable construction, where the other components heating device can be safely absorbed. In a connected embodiment of the hollow body and the least one housing part are welded together, soldered, crushed, crimped or glued. Other types of connection, which allow a stable and advantageous also heat stable connection, can be used.

Preferably, at least two heating devices are provided which are in particular switchable. These may in particular be distributed symmetrically in the heating device, one above the other, be arranged next to one another or even distributed unevenly. Particularly preferably, the plurality of heaters can be operated via a switch or a selector switch individually or together to achieve different heating powers.

So that the heater can not overheat, or so that the heater is not particularly hot outside, especially at least one safety thermostat and / or a threshold value switch are provided. This ensures that the heater is disabled when, for example, the outer shrouds exceed a critical temperature. Thus, the risk of injury or burn can be better avoided.

In a further preferred embodiment, at least one covering device is only slightly larger than at least one housing part. As a result, in particular when using shell-shaped covering devices and housing parts, an advantageous region for the flow of cooling air is limited.

The heater is effectively cooled at the top and bottom accessible areas in advantageous embodiments by the cool air flowing through the top and bottom areas. So that you can not grasp directly to the heater or in the interior of the heater, the formed interior of at least one safety device is at least partially surrounded. For this purpose, preferably a wire mesh, a grid or bars, which are arranged so that they provide adequate protection.

In further advantageous embodiments, at least one handle and / or at least one foot are provided on the heating device. This makes it easy to transport. It may also be advantageous additionally or even exclusively provided a bottom attachment means to install the heater firmly on the ground or at other locations.

Further advantageous features and embodiments of the invention will become apparent from the following embodiment, which will now be described with reference to the accompanying figures.

Show:

1 a top perspective view of a heating device according to the invention in a schematic representation;

2 a perspective view from below of the heater according to the invention according to 1 in a schematic representation;

3 a side view of the heater according to the invention according to 1 in a schematic representation;

4 a sectional view of the heater according to 4 in a schematic representation;

5 a further sectional view of the device in a schematic side view;

6 A plan view of the heater of a heating device according to the invention in a schematic representation;

7 a further embodiment of a heater according to the invention for mounting on the ground in a schematic view; and

8th Yet another embodiment of a heating device according to the invention.

The 1 - 3 show a heater according to the invention 1 , which is particularly suitable for use under a table, from different perspectives. The heater 1 can with the handle 27 simply transported and placed at the desired position. It has a diameter d about 300 mm, which makes the very small-sized device 1 Can be used almost anywhere under a table.

You can see well the top cover 9 and the lower cover device 14 that's just one piece below these protruding housing parts 8th . 13 cover.

The upper and lower cover devices 9 . 14 are above and below with screws not visible here 30 and nuts 31 each at the upper and lower housing part 8th . 13 attached. The lower nuts 31 serve in this embodiment at the same time as feet 28 ,

So you do not get into the hot interior 25 the heater 1 can intervene, here is a wire mesh 32 provided here as a safety device 26 is used.

The heaters 2 the heater 1 are powered by a cable, for example, by the lower cover 14 and / or the lower housing part 13 can be guided. The cable is not shown in detail in the drawings.

In 3 one sees an embodiment of a heating device according to the invention 1 in a side view. Again, you can see the top and bottom covers 9 . 14 that is a bowl-shaped design 22 similar to a Frisbee disc.

The interior 25 is from a safety device 26 protected from interference, as in 1 and 2 the safety device 26 as wire mesh 32 is trained.

In other embodiments, but also other safety devices 26 be used advantageously. For example, multiple rods may be placed between the cover assemblies 9 . 14 or between the housing parts 8th . 13 the interior 25 shield.

In the middle of the device 1 you can see the hollow body 3 who is here with the housing parts 8th . 13 is welded. This creates a stable framework construction on which the covering devices 9 . 14 can be safely taken.

Above the lower frame part is still a piece of the heater 2 to be seen here as a heating rod 16 around the hollow body 3 is bent.

The heater 1 For the most part it is made of aluminum to allow a particularly light weight. But there are also other materials and different materials for the different components conceivable. However, all parts are advantageous by the heater 2 be heated, made of a heat-resistant material.

In 4 is a section through the heater 1 according to 3 shown. Based on this drawing, the operating principle of the device according to the invention can be well explained.

In the embodiment shown here are two heaters 2 provided as heating elements 16 are formed. These can by means of a switch not shown here 39 be switched on and off. Also, the separate switching one or both heaters 2 is possible.

The heaters 2 heat by heating convection the interior 25 the heater 1 and thereby in particular also the upper housing part 8th , the lower housing part 13 and the hollow body 3 , These heated parts become warm in the example shown here up to 200 ° and reflect the heat to the outside.

Depending on the design and spacing of the upper and lower housing parts 8th . 13 can be a reflection angle 34 To be defined. For example, the heat output may be focused on the legs and / or feet by the type of heater.

To allow a stable construction, the hollow body 3 and the housing parts 8th . 13 in the area 7 the upper opening 4 of the hollow body and in the lower area 12 the lower opening 5 firmly connected. This is realized here by welding, but it can also be used other advantageous connection methods.

So you do not accidentally to the hot parts of the device 1 can, for example, protect dogs from injury, is the direct access to the interior 25 the heater 1 through a wire mesh 32 covered. This is only moderately warm due to the contact with the cool outside air.

The cooling of the top 35 and the bottom 36 is here by the special arrangement of the covering 9 . 14 reached. The upper cover 9 forms with the upper housing part 8th an upper area 11 , through the air 10 can flow. Accordingly, the lower cover device forms 14 with the lower housing part 13 a lower area 15 , which is also traversed by air.

The upper housing part 8th and the lower housing part 14 are here disk-shaped or cup-shaped and have an approximately centrally disposed opening, that of the upper opening 4 and the lower opening are substantially similar, so that the openings 4 . 5 of the canal 6 of the hollow body 3 at least partially free.

The upper area 11 stands with the lower area 15 over the canal 6 of the hollow body 3 in connection. This will make it possible for cool air 10 from outside the heater 1 in the lower area 15 is pulled and over the channel 6 through the upper area 11 kicking out again. This will provide effective cooling of the capping devices 9 . 14 achieved, which then heat up only slightly and thus no longer represent a risk of burns. The air flow through the device 1 indicated by the arrows.

5 shows a different section through the heating device according to the invention 1 , wherein the safety device 26 for the sake of clarity is not shown. In this case, via arrows, the heat convection of the heaters 2 indicated.

Furthermore, you can see that spacers 37 are provided, which are the covering 9 . 14 and the housing parts 8th . 13 by means of screws 30 and nuts 31 Arrange at a certain distance to each other. Depending on the distance different cooling effects can be achieved.

In 5 are arrows 45 . 46 drawn for the heat transport. The convective heat flow 45 is shown schematically by solid arrows, while the radiant heat flow 46 is represented by dotted registered arrows. The convective heat flow 45 is generated by a corresponding air movement.

Will the heater 1 seated under a table, clothed lower legs are worn by persons sitting on them, in particular by the convective heat flows 45 heated. As a result, in particular, the lower area is warmed up to the ground, so that the feet, shoes and lower legs are heated. Unpleasant cold feet are so reliably avoided. The radiant heat flows 46 on the other hand provide up to approx. knee height for a direct warming z. B. unclothed lower leg and feet.

The combination of angular heat radiation and the toroidal or annular air movement generated radially around the heater causes an efficient heating of the surrounding area under a table, so that, for example, a garden table is pleasantly usable even in cooler outdoor temperatures in the evening.

In 6 is the top view of the lower housing part 13 , the lower cover device 14 and the heaters 2 shown.

In the middle you can see the lower opening 5 of the hollow body 3 and looks at the inside of the lower cover 14 ,

The heaters 2 are annular around the hollow body 3 placed and by means of fasteners 38 safely recorded. The heaters 2 can be arranged directly next to each other as shown here, but they can also be arranged at different heights or unevenly.

In 7 is another embodiment of the heating device according to the invention 1 displayed. The mode of operation is very similar to the previously described embodiments.

Again, we are the top 35 through the cooling air 10 passing through the canal 6 of the hollow body 3 and through the upper area 11 is pulled, cooled.

However, here are no lower cover 14 and no lower housing part 13 intended. The device 1 is directly by means of several ground fixtures 29 on the ground 40 attached. The floor 40 serves as a reflection surface and a cooling of the bottom 36 the heater 1 is not necessary as this is due to the attachment to the ground 40 is not accessible.

Another embodiment of this device 1 can also be a lower housing part 13 include, resulting in cooler air 10 from the outside area may be better drawn into the channel.

In 8th is a further preferred embodiment of the heating device according to the invention 1 shown. Again, the operation is basically similar to the previously described embodiments. In contrast to the previous embodiments, the heating device 1 here a recording room 47 in the form of a central through hole. The recording room 47 can z. B. for performing or for receiving a very schematically drawn table leg 48 or the like and have corresponding dimensions as needed. This allows the heater 1 For example, be centrally located on a rotary table, so that grouped around the heater 1 do not feel like a separate part. This requires even less space.

Optionally, the top may be suitable for storing the feet. Since the surface also assumes only slightly higher temperatures than the environment during operation, the shoes and feet of users in this embodiment and also the other embodiments can be warmed so pleasantly directly from below.

In all advantageous embodiments, the heating device according to the invention 1 also safety systems, such as a safety thermostat 23 and / or a threshold switch 24 include. This can overheat the device 1 be avoided.

Also, an accurate control of the output temperature may in other embodiments via a control 41 or control device 42 to be possible. Then, for example, via a display 43 will be displayed, what temperature the heater 1 just has.

A central control device for beer gardens with multiple heaters can be provided, the wired or wireless z. B. handheld devices such. B. smartphones the individual heaters on and off or controls.

LIST OF REFERENCE NUMBERS

1

heater

2

heater

3

hollow body

4

upper opening

5

lower opening

6

channel

7

Area

8th

Upper housing part

9

upper cover device

10

air

11

upper area

12

Area

13

lower housing part

14

cover

15

lower area

16

heater

17

heating tape

18

gas burner

19

filament

20

plate

21

disc

22

cup-shaped design

23

safety thermostat

24

threshold

25

inner space

26

safety device

27

Handle

28

feet

29

Floor fastening device

30

screw

31

mother

32

wire cloth

33

aluminum

34

angle of reflection

35

top

36

bottom

37

spacer

38

fastener

39

switch

40

ground

41

control device

42

control device

43

display

45

convective heat flow

46

Radiation heat flux

47

accommodation space

48

Table leg

d

diameter

Claims (12)

Heating device ( 1 ) comprising at least one heating device ( 2 ) and at least one hollow body ( 3 ) with at least one upper ( 4 ) and at least one lower opening ( 5 ) and at least one between the openings ( 4 . 5 ) trained channel ( 6 ), whereas in the area ( 7 ) of the upper opening ( 4 ) of the hollow body ( 3 ) at least one upper flat housing part ( 8th ) is provided, such that the upper opening ( 4 ) of the hollow body ( 3 ) remains at least partially free, characterized in that the upper housing part ( 8th ) at least one at least partially arranged above upper cover device ( 9 ) associated with at least one of air ( 10 ) throughflowable upper area ( 11 ) between the upper housing part ( 8th ) and the upper covering device ( 9 ) defined by the upper opening ( 4 ) of the hollow body ( 3 ) extends to the outside. Heating device ( 1 ) according to claim 1, characterized in that in the area ( 12 ) of the lower opening ( 5 ) of the hollow body ( 3 ) at least one lower flat housing part ( 13 ) is provided, such that the lower opening ( 5 ) of the hollow body ( 3 ) remains at least partially free. Heating device ( 1 ) according to the preceding claim, characterized in that the at least one lower housing part ( 13 ) at least one at least partially arranged below lower cover device ( 14 ) associated with one of air ( 10 ) throughflowable lower area ( 15 ) between the lower housing part ( 13 ) and the lower cover device ( 14 ) defined by the lower opening ( 5 ) of the hollow body ( 3 ) extends outward and over the channel ( 6 ) of the hollow body ( 3 ) with the upper area ( 11 ). Heating device ( 1 ) according to the preceding claim, characterized in that at least one covering device ( 9 . 14 ) on at least one housing part ( 8th . 13 ) is recorded. Heating device ( 1 ) according to one of the preceding claims, characterized in that the at least one heating device ( 2 ) as a heating rod ( 16 ), Heating tape ( 17 ), Gas burner ( 18 ) and / or filament ( 19 ) and / or that the at least one heating device ( 2 ) on the lower housing part ( 13 ) is recorded. Heating device ( 1 ) according to one of the preceding claims, characterized in that at least one housing part ( 8th . 13 ) and / or at least one covering device ( 9 . 14 ) as a plate ( 20 ), Disc ( 21 ) or cupped ( 22 ) is trained. Heating device ( 1 ) according to one of the preceding claims, characterized in that the hollow body ( 3 ) with at least one housing part ( 8th . 13 ) is made in one piece or connected to it. Heating device ( 1 ) according to one of the preceding claims, characterized in that at least two heating devices ( 2 ) are provided, which are in particular switchable. Heating device ( 1 ) according to one of the preceding claims, characterized in that at least one safety thermostat ( 23 ) and / or a threshold value switch ( 24 ) is provided. Heating device ( 1 ) according to one of the preceding claims, characterized in that at least one covering device ( 9 . 14 ) only slightly larger than at least a housing part ( 8th . 13 ). Heating device ( 1 ) according to one of the preceding claims, characterized in that the formed interior ( 25 ) of at least one safety device ( 26 ) is at least partially surrounded. Heating device ( 1 ) according to one of the preceding claims, characterized by at least one handle ( 27 ) and / or at least one foot ( 28 ) and / or at least one floor fastening device ( 29 ).

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