Electric infrared heater in the form of a flat heating panel

Abstract

Infrared heater (1) with a heat-emitting front panel (2), an electrically contacted electrical resistor / in the form of a heating conductor that converts electrical energy into heat, a back wall (5) and insulating material (4.1) between the heating conductor and the back wall (5), characterized in that at least one aluminium chamber (4) is arranged between the heating conductor and the back wall (5), wherein the aluminium chamber (4) is filled with the insulating material (4.1).

Description

[0001] The invention relates to an infrared heater in the form of a panel heater according to the preamble of the first claim.

[0002] The invention relates to electric infrared heating devices for indoor use, in particular flat wall heating panels with radiation-based heat generation.

[0003] Conventional infrared heaters lose some of the generated heat to the wall behind them. This causes the temperature of the back wall to rise unnecessarily, increasing energy consumption and reducing the efficiency of the device.

[0004] Known infrared heaters of this type consist of several layers: a front panel that radiates heat, the heating element underneath that converts electrical energy into heat, an insulating layer that directs the heat forward towards the front panel, and a back panel located behind the insulating layer.

[0005] These layers are typically integrated into a flat panel that is connected via a power cable, with safety sensors preventing overheating. Such infrared heaters are usually mounted on a wall or ceiling. Often, a reflective layer (reflector) is placed behind the heating element to direct the radiation further towards the front panel and thus into the room. The reflector in an infrared heater is typically made of aluminum.

[0006] For example, publication FR 2671854 A1 describes a plate-like radiant heater with an aluminum housing. The housing consists, for instance, of an aluminum plate and contains an aluminum reflector formed from an aluminum plate with reflective sides for the emitted infrared radiation. A layer of thermal insulation material is located on the back of the reflector. The lower part is closed off by a radiant panel that fits onto the reflector.

[0007] From publication EP 3 045 826 B1, an infrared surface heating arrangement is known, comprising an electric infrared surface element as an infrared surface heater in a far-infrared range of 5 to 200 µm, with a first layer as a back wall for thermal insulation, a second layer containing a plastic-like material and designed as a reflective coating, in particular with aluminum foil, and a third layer comprising the electric infrared surface element as a heating mat, wherein the second layer with the reflective coating is spaced apart from the heating mat. The necessary connections between the individual layers are made by adhesive bonding.

[0008] Furthermore, panel-like infrared heaters are known from the prior art, in which an aluminum foil is also arranged between the heating element and the insulating material.

[0009] Aluminium is used as a reflective material because this metal provides excellent reflection of heat radiation, including infrared radiation.

[0010] The main function of the reflector is to direct the heat forward into the room and minimize heat loss into the rear wall.

[0011] The object of the invention is to direct infrared radiation more effectively towards the front of the radiator, to minimize energy losses and to significantly increase heat output into the room.

[0012] This task is solved by the features of the first claim. Advantageous embodiments result from the dependent claims.

[0013] The infrared heater according to the invention has a heat-emitting front panel, an electrically contacted electrical resistance in the form of a heating conductor that converts electrical energy into heat, a back wall and insulating material between the heating conductor and the back wall, wherein at least one aluminum chamber is arranged between the heating conductor and the back wall, and the aluminum chamber is filled with the insulating material.

[0014] The heating conductor is preferably embedded in a heating mat that is attached to the inside of the front panel.

[0015] Furthermore, at least one aluminum chamber is preferably attached to the inside of the back wall.

[0016] There is a space between the aluminum chamber and the heating mat, which is filled with air.

[0017] If required, several aluminum chambers can be arranged side by side, one above the other, and / or one behind the other. This is particularly advantageous for larger dimensions.

[0018] From the inside of the front panel to the corresponding side of the aluminium chamber(s) a first chamber is formed in which the heating mat is located and from the first chamber to the inside of the rear wall a second chamber extends which is formed by the aluminium chamber(s) or in which one or more aluminium chambers (4) are arranged.

[0019] Preferably, the aluminium chamber is designed in the form of a rectangular hollow body with a wall thickness of 0.8 to 1.2 mm.

[0020] To insert the insulation material, the aluminium chamber is opened on at least one side and is closed after the insulation material has been inserted.

[0021] The infrared heater according to the invention uses for the first time an integrated two-chamber technology (Duo Chamber Technology) for directed heat radiation towards the front wall and thus into the room and reduced rear wall temperature.

[0022] The infrared heater according to the invention has a first chamber which is attached to the front wall or front panel and in which the heating conductor is arranged, which is, for example, integrated into a heating mat or a heating fleece.

[0023] Furthermore, for the first time, at least a second chamber is present, which consists of aluminium and is arranged towards the rear wall, with the insulating material arranged in the aluminium chamber.

[0024] At least one chamber made of aluminium with integrated insulation material performs the following functions: 1. Reflection of infrared radiation forwards towards the front wall and thus into the room. The aluminum chamber acts as a highly effective reflective surface and throws the rearward-radiating IR waves back towards the front of the heater. 2. Thermal decoupling through insulation. Insulation material is placed inside the chamber. This drastically reduces the heat on the back of the infrared heater, thus improving energy efficiency. 3. Targeted control of thermal flow. The heater emits more heat forward into the room and loses less energy to the wall.

[0025] This novel two-chamber technology – referred to as “Duo Chamber Technology” – is not present in the prior art and represents a structurally simple but highly effective functional upgrade of existing IR technologies.

[0026] It is also possible to equip an infrared heater with several aluminum chambers arranged side by side and / or one above the other. This can be done, for example, if the infrared heater has a large surface area and it is therefore advantageous to use not just one large aluminum chamber, but several smaller aluminum chambers. Functional sequence:

[0027] Once activated, for example via a wireless control, the heating mat heats up thanks to the integrated heating element. The generated infrared radiation is reflected by the aluminum chamber and directed forward. As a result, the back wall surprisingly remains significantly cooler than if only an aluminum foil or plate were placed between the heating mat and the insulation.

[0028] The main advantages of the invention are the reduced rear wall temperature due to the thermal shielding via the aluminum chamber with integrated insulation, a significantly higher heat dissipation to the front and an optimized radiation guidance through a robust reflection geometry.

[0029] Further advantages include reduced energy consumption, as there is no unnecessary heating of the wall, and increased efficiency without additional electronics or complex controls.

[0030] None of the conventional infrared heaters have a second aluminum chamber for combined reflection and thermal decoupling. The "Duo Chamber Technology" therefore represents a new and innovative technical solution.

[0031] The invention is explained in more detail below with reference to an exemplary embodiment and associated drawings.

[0032] They show: Fig. 1. The schematic representation of a cross-section of an infrared surface heating system, Fig. 2 an exploded view of the infrared surface heating, Fig. 3 several aluminium chambers arranged one above the other and next to each other 4, Fig. Section 4 showing two superimposed aluminum chambers.

[0033] The infrared surface heater 1 exhibits according to Fig. 1 a front wall 2 facing the room, on which the heating mat 3 with the heating conductor integrated therein (not shown) is arranged.

[0034] At least one aluminum chamber 4, preferably closed on its circumference, is arranged in an air-filled space L from the heating mat 3. Insulating material 4.1 is located in the aluminum chamber 4. The rear wall 5, which forms the end of the layered structure of the infrared surface heater 1, rests against the aluminum chamber 4.

[0035] A first chamber K1 is formed between the front wall 2 and the aluminum chamber 4, and the aluminum chamber 4 forms a subsequent second chamber K2. A frame-like profile P is provided around the perimeter, for example, which closes the layered structure at the top, bottom, and sides. Of course, other types of covers can also be provided to cover the layered structure at the top, bottom, and sides.

[0036] Not shown are the electrical supply cable to the heating element and the means for wall or ceiling mounting or for placing it on the floor. Also not shown are the controls, which allow for temperature setting and / or timer activation, and which, for example, enable integration into a Wi-Fi network.

[0037] The total depth T1 of the layer structure of the infrared surface heater 1 is between 25 mm and 40 mm. Preferably, the total depth T1 is 30 mm.

[0038] The depth T2 of the first chamber K1 is 15mm to 25mm, preferably 20mm, and the depth T3 of the second chamber K2 in the form of the aluminum chamber 4 is preferably 7mm to 12mm, preferably 10mm.

[0039] The wall thickness (not specified) of the aluminium chamber is 1.2mm to 0.8mm, preferably 1.0mm.

[0040] To position the insulation material 4.1, the aluminium chamber 4 is opened and is closed after the insulation material 4.1 has been inserted.

[0041] The preferred insulation material 4.1 is rock wool, ceramic fiber insulation or glass wool.

[0042] The front panel 2 is preferably made of sheet steel, but can also be made of stainless steel or aluminum. Its material thickness is, for example, 1 mm to 1.5 mm, particularly 1.0 mm if the front panel 2 is made of sheet steel.

[0043] The heating mat 3 with the integrated heating conductor is made, for example, of polyester fleece, but can also be made of aramid fibers. Its thickness is preferably 1 mm.

[0044] The rear wall 5, for example, consists of sheet steel or stainless steel and has an unspecified thickness of 1 mm to 1.5 mm, preferably 1 mm, if it is made of sheet steel.

[0045] Fig. Figure 2 shows an exploded view of the basic structure of the infrared surface heater 1 for clarification.

[0046] The front panel 2 is visible, against which the heating mat 3 (with integrated heating conductor not shown separately) rests when mounted.

[0047] The heating mat 3 can be bonded to the front panel 2 in a material-bonded manner, preferably by gluing.

[0048] An aluminum chamber 4 is arranged at a distance L from the heating mat 3. Its height and length (not specified) essentially correspond to the height and length of the heating mat 3. The insulating material, not shown here, is located inside the aluminum chamber. In the assembled state, the rear panel 5 rests against the aluminum chamber 4. The rear panel 5 can be screwed or glued to the aluminum chamber 4.

[0049] When assembled, a circumferential cover (e.g. a frame-like profile) runs around the layer structure, which is not shown here.

[0050] According to Fig. 3 and Fig. 4. It is also possible to arrange several aluminium chambers 4 next to and / or on top of each other in the second chamber K2.

[0051] Fig. Figure 3 shows an exemplary variant in which three aluminium chambers 4 arranged next to each other are arranged in two rows one above the other.

[0052] An exemplary longitudinal section in schematic representation shows Fig. 4.

[0053] The heating mat 3 is attached to the front panel 2, which faces the room, in the first chamber K1, followed by a gap L to the second chamber K2, in which two aluminum chambers 4 are arranged one above the other. Two aluminum chambers 4 arranged one above the other can be arranged side by side in several rows (see Fig. 3) The rear wall 5 adjoins the rear sides of the aluminum chambers 4. In this variant as well, a profile P runs circumferentially around the layered structure of the infrared heater 1.

[0054] Depending on the design and dimensions, more than two of the aluminum chambers can of course be arranged above and / or next to each other and / or behind each other. Reference symbol list 1 infrared heater 2 Front panel 3 heating mats 4 aluminum chambers 5 Back panel K1 first chamber K2 second chamber P Profile strip / profile T1 Total depth of the layer structure of the infrared surface heating system 1 T2 Depth of the first chamber K1 T3 Depth of the second chamber K2 QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] FR 2671854 A1

[0006] EP 3 045 826 B1

[0007]

Claims

[1] Infrared heater (1) with a heat-emitting front panel (2), an electrically contacted electrical resistor / in the form of a heating conductor that converts electrical energy into heat, a back panel (5) and insulating material (4.1) between the heating conductor and the back panel (5), characterized by , that at least one aluminium chamber (4) is arranged between the heating conductor and the rear wall (5), wherein the aluminium chamber (4) is filled with the insulating material (4.1). [2] Infrared heater (1) according to claim 1, characterized by , that the heating conductor is embedded in a heating mat (3) which is attached to the inside of the front panel (2). [3] Infrared heater (1) according to claim 1 or 2, characterized by , that at least one aluminium chamber (4) is attached to the inside of the rear wall (5) and that there is a gap (L) between aluminium chamber (4) and heating mat (3). [4] Infrared heater 1 according to one of claims 1 to 3, characterized bythat several aluminium chambers (4) are arranged next to each other and / or one above the other and / or one behind the other. [5] Infrared heater 1 according to one of claims 1 to 4, characterized by , that a first chamber (K1) is formed from the inside of the front panel (2) to the side of the aluminium chambers to which it is attached, in which the heating mat (3) is located, and that a second chamber (K2) is formed from the first chamber (K1) to the inside of the rear wall (5), in which one or more aluminium chambers (4) are arranged. [6] Infrared heater 1 according to one of claims 1 to 5, characterized by , that the aluminium chamber (4) is a rectangular hollow body with a wall thickness of 0.8 to 1.2 mm. [7] Infrared heater 1 according to any one of claims 1 to 6, characterized by , that the aluminium chamber (4) is open for inserting the insulating material (4.1).

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