A far infrared heater

Abstract

The present application relates to the field of electric heating, and specifically provides a far-infrared heater, which includes a heater, an insulating heat-conducting layer and a multi-layer radiation shielding layer. The heating layer is located at the axial core of the far-infrared heater, the insulating heat-conducting layer is sleeved inside and outside the heating layer, the multi-layer radiation shielding layer is sleeved outside the insulating heat-conducting layer, the multi-layer radiation shielding layer includes an electromagnetic field shielding layer, an electric field shielding layer and a far-infrared blackening layer, and the heating layer, the insulating heat-conducting layer and the multi-layer radiation shielding layer extend continuously along the length direction and are designed without openings. The problem of magnetic field radiation and electric field radiation generated by the heater in the prior art leaking to the outside world is solved. The far-infrared heater is continuous along the length direction without openings, so as to avoid magnetic field radiation and electric field radiation from leaking from gaps and holes. The design can shield electromagnetic radiation and electric field radiation multiple times, thereby eliminating the adverse effects of electromagnetic radiation on the human body and equipment.

Description

Technical Field

[0001] The utility model relates to the field of electric heating, in particular to a far-infrared heater. Background Art

[0002] Electric heating products are widely used in our daily life, such as sauna room, baking and dry steaming equipment. The most commonly used one is armored electric heating technology. Its principle is to install the electric heating wire in a metal tube, fill the insulation material between the heating wire and the metal tube, and use sealing materials at both ends of the metal tube to ensure that the insulation material does not reduce safety performance due to changes in the environment. When working, the working voltage is passed through both ends of the resistance wire, and the resistance wire generates heat Q=I 2 R, transfers heat to the metal outer tube through heat conduction, and then transfers heat to the human body or the heated object through thermal radiation, heat conduction or convection. From the magnetic induction principle of electric current, we know that electric current can induce electromagnetic field, so there is a continuous electromagnetic field around the metal tubular electric heating tube, and the intensity of the electric field and magnetic field decreases with the distance. In most cases, the environment in which we work and live is far enough away from the heater, and the electromagnetic radiation field it generates is low enough to cause no harm to the human body, so we can ignore the impact of the power frequency electric and magnetic fields on our human body.

[0003] In some specific application scenarios, such as sauna rooms, where medical heating equipment and electric heating tubes are very close to the control circuit and the human body and work continuously, considering the coupling effect and cumulative results, we need to consider the electromagnetic compatibility of the electromagnetic radiation to the human body and the surrounding environment. If the medical heating equipment, electric heating tubes, etc. are very close to the control circuit and the human body and work continuously, the existence of electromagnetic radiation will cause adverse effects on the human body and the equipment.

[0004] Therefore, the prior art still needs to be improved and developed. Utility Model Content

[0005] In view of the deficiencies of the prior art, the purpose of this application is to provide a far-infrared heater, which is intended to shield the electromagnetic radiation generated by the heater in the prior art and eliminate the adverse effects of electromagnetic radiation on the human body and equipment.

[0006] The technical solution adopted by the present application to solve the technical problem is as follows: a far-infrared heater, comprising:

[0007] Heating layer: the heating layer is located at the axis core;

[0008] Insulating heat-conducting layer: the insulating heat-conducting layer is sleeved inside and outside the heating layer;

[0009] Multi-layer radiation shielding layer: the multi-layer radiation shielding layer is sleeved outside the insulating heat-conducting layer, and the multi-layer radiation shielding layer includes an electromagnetic field shielding layer, an electric field shielding layer and a far-infrared blackening layer;

[0010] The heating layer, the insulating heat-conducting layer and the multi-layer radiation shielding layer extend continuously along the length direction and have no openings.

[0011] Furthermore, the electromagnetic field shielding layer is sleeved outside the insulating heat-conducting layer.

[0012] Furthermore, the electromagnetic field shielding layer is a silicon steel layer or a low carbon steel layer.

[0013] Furthermore, the thickness of the electromagnetic field shielding layer is 0.6 mm-0.8 mm.

[0014] Furthermore, the electric field shielding layer is sleeved outside the electromagnetic field shielding layer.

[0015] Furthermore, the electric field shielding layer is a copper foil layer or an aluminum foil layer.

[0016] Furthermore, the electric field shielding layer has a thickness of 0.1 mm to 0.3 mm.

[0017] Furthermore, the far-infrared blackening layer is sleeved outside the electric field shielding layer.

[0018] Furthermore, the far-infrared blackening layer is a high-nickel alloy layer.

[0019] Furthermore, the far-infrared blackening layer has a thickness of 0.4 mm to 0.8 mm.

[0020] Beneficial effects:

[0021] The present application provides a far-infrared heater, which is used to shield the electromagnetic radiation generated by the heater in the prior art and eliminate the adverse effects of electromagnetic radiation on the human body and equipment. The far-infrared heater is heated by the heating layer, and then the insulating thermal conductive layer shields the current in the heating layer. The multi-layer radiation shielding layer shields the electromagnetic radiation and electric field radiation generated when the heating layer is heated by the heating layer. The heating layer, the insulating thermal conductive layer and the multi-layer radiation shielding layer are all designed to be continuous and continuous without holes in the length direction, so as to prevent electromagnetic radiation and electric field radiation from overflowing from the gaps or holes at the connection. At the same time, the multi-layer radiation shielding layer also adopts a multi-layer structural design, and different structural layers have different effects, so as to more effectively shield the electromagnetic radiation and electric field radiation generated by the operation of the heating layer, and perform multi-layer shielding on the electromagnetic radiation and electric field radiation to avoid adverse effects on the human body and electromagnetic interference to the equipment around the far-infrared heater, while maintaining the normal operation of the equipment around the far-infrared heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional schematic diagram of a far-infrared heater in the utility model.

[0023] Description of reference numerals:

[0024] 1. Heating layer; 2. Insulating thermal conductive layer; 3. Multi-layer radiation shielding layer; 31. Electromagnetic field shielding layer; 32. Electric field shielding layer; 33. Far infrared blackening layer. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described here are only used to explain the present application and are not used to limit the present application.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "push-pull" and "open-and-close" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "push-pull" and "open-and-close" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0027] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] The utility model provides a far-infrared heater. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0029] like Figure 1As shown, a far-infrared heater is used to shield the electromagnetic radiation generated by the heater in the prior art and eliminate the adverse effects of electromagnetic radiation on the human body and equipment. The far-infrared heater includes a heating layer 1, an insulating heat-conducting layer 2 and a multi-layer radiation shielding layer 3. The heating layer 1 is located at the axis of the far-infrared heater. The heating layer 1 is used to generate heat by energizing so that the far-infrared heater can heat the location. The insulating heat-conducting layer 2 is located inside and outside the heating layer 1, and is used to isolate the current in the heating layer 1 to prevent the far-infrared heater from leaking electricity and causing adverse effects on people and equipment, causing harm to the human body or causing the equipment to be short-circuited and damaged. The multi-layer radiation shielding layer 3 is sleeved outside the insulating heat-conducting layer 2 to shield the electromagnetic radiation generated when the heating layer 1 is energized and heated, so as to prevent the electromagnetic radiation from causing adverse effects on the human body and equipment. The multi-layer radiation shielding layer 3 includes an electromagnetic field shielding layer 31, an electric field shielding layer 32 and a far-infrared blackening layer 33. At the same time, the heating layer 1, the insulating heat-conducting layer 2 and the multi-layer radiation shielding layer 3 are designed to be continuous without openings along the length direction, which means that the far-infrared heater has no gaps and holes in the length direction, further shielding the electromagnetic radiation generated when the heating layer 1 is powered on.

[0030] Furthermore, the electromagnetic field shielding layer 31 is sleeved on the outside of the insulating thermal conductive layer 2. When the heating layer 1 is powered on, the electromagnetic radiation generated will pass through the insulating thermal conductive layer 2 from the radiation layer, and then reach the electromagnetic field shielding layer 31. In order to shield the electromagnetic radiation and prevent the radiation from overflowing as much as possible, the electromagnetic field shielding layer 31 adopts a silicon steel layer with high magnetic permeability and conductivity. In other embodiments, a low-carbon steel layer can also be used. Low-carbon steel is carbon steel with a carbon content of less than 0.25%. In this way, most of the magnetic lines of force are guided into the interior of the material through high magnetic permeability and conductive materials to prevent electromagnetic radiation from overflowing. At the same time, when the heating layer 1 is powered on, electric field radiation will also be generated. Electric field radiation also has adverse effects on the human body and equipment. The electromagnetic field shielding layer 31 can also shield a certain amount of electric field radiation, and the remaining unshielded electric field radiation is shielded by the electric field shielding layer 32. In order to ensure the shielding effect of the electromagnetic field shielding layer 31, and also to ensure the compact structure of the far-infrared heater and control the production cost of the far-infrared heater, in this embodiment, the thickness of the electromagnetic field shielding layer 31 is 0.6mm-0.8mm, preferably 0.7mm, so as to control the size and weight of the far-infrared heater while ensuring the shielding effect.

[0031] In order to shield the electric field radiation generated when the heating layer 1 is powered on, the multi-layer radiation shielding layer 3 also includes an electric field shielding layer 32. The electric field shielding layer 32 is arranged outside the electromagnetic field shielding layer 31. The electric field shielding layer 32 shields the electric field radiation by using highly conductive materials. Although the electromagnetic field shielding layer 31 has a certain shielding effect on the electric field radiation, the electromagnetic field shielding layer 31 cannot completely shield the electric field radiation. Some electric field radiation still passes through the electromagnetic field shielding layer 31. Therefore, the electric field shielding layer 32 is required to shield this part of the electric field radiation. Therefore, the electric field shielding layer 32 adopts a copper foil layer. In other embodiments, an aluminum foil layer can also be used. The copper foil or aluminum foil is adhered to the outer circle of the electromagnetic field shielding layer 31 to further shield the electric field radiation passing through the electromagnetic field shielding layer 31. In order to ensure the shielding effect of the electric field shielding layer 32, and also to ensure the compact structure of the far-infrared heater and control the production cost of the far-infrared heater, in this embodiment, the thickness of the electric field shielding layer 32 is 0.1-0.3mm, and the optimal thickness of the electric field shielding layer 32 is 0.3mm, which controls the width and weight of the far-infrared heater while ensuring the shielding effect.

[0032] At the same time, in order to further shield electromagnetic radiation and electric field radiation and prevent electromagnetic radiation and electric field radiation from overflowing from the far-infrared heater, the multi-layer radiation shielding layer 3 also includes a far-infrared black layer 33, which is set outside the electric field shielding layer 32. The far-infrared black layer 33 uses a conductive metal material to further shield electromagnetic radiation and electric field radiation. The constituent material of the far-infrared black layer 33 is preferably a high-nickel alloy, that is, the far-infrared black layer 33 is a high-nickel alloy layer, and the high-nickel alloy is used to further shield electromagnetic radiation and electric field radiation. Specifically, by allowing the electromagnetic field generated by the heating layer 1 to form a continuous reflection between the electromagnetic field shielding layer 31 and the far-infrared black layer 33, the intensity of the electromagnetic field is attenuated, thereby further reducing electromagnetic radiation. In addition, since the far-infrared black layer 33 uses a conductive metal, the far-infrared black layer 33 can further reduce electric field radiation. Secondly, the far-infrared blackening layer 33 is blackened to prevent the far-infrared heater from rusting while increasing the far-infrared effect and the heating efficiency of the far-infrared heater. The far-infrared heater design increases the outer diameter of the tube, thereby reducing the power density of the tube surface under the same power, making the far-infrared effect better. In order to ensure the shielding effect of the far-infrared blackening layer 33, and also to ensure the compact structure of the far-infrared heater and control the production cost of the far-infrared heater, the thickness of the far-infrared blackening layer 33 is 0.4mm-0.8mm, preferably 0.7mm, to ensure that the far-infrared heater has the best far-infrared effect and corrosion resistance. In addition to the heating layer 1 and the insulating thermal conductive layer 2, the overall tube diameter of the far-infrared heater is The width and weight of the far infrared heater are controlled while ensuring the shielding effect.

[0033] In other embodiments, in order to further improve the far-infrared radiation effect of the far-infrared heater, a layer of far-infrared material can be coated on the outside of the far-infrared blackening layer 33. The far-infrared material is graphene or other far-infrared materials, so as to significantly improve the effect of far-infrared radiation and the heating efficiency of the far-infrared heater, so that the far-infrared heater can achieve better heating effect when powered on at a certain power. Therefore, a lower heating power can be used to achieve the far-infrared heating effect under the original high power. When the heating power is reduced, the intensity of the electromagnetic radiation is also reduced. This can better avoid the adverse effects of electromagnetic radiation on the human body and equipment.

[0034] When used in situations where there are strict requirements on the amount of radiation, a shielding structure can be added to the multi-layer radiation shielding layer 3 to completely eliminate radiation leakage. For example, when using a far-infrared heater in the presence of medical equipment, if there is electromagnetic radiation near the medical equipment, the electromagnetic radiation will interfere with the operation of the medical equipment, for example, it will affect the medical equipment's monitoring of the patient's vital signs, resulting in inaccurate data on the medical equipment and affecting the doctor's judgment of the patient's physical condition; more seriously, it will affect the medical equipment's treatment of the patient, delay the patient's treatment cycle, and cause unnecessary pain to the patient. Therefore, in such scenarios with strict requirements on electromagnetic radiation, electromagnetic radiation must be completely shielded and cannot be leaked into the external environment. Specifically, in this embodiment, the multi-layer radiation shielding layer 3 is a three-layer structure, which includes an electromagnetic field shielding layer 31, an electric field shielding layer 32 and a far-infrared blackening layer 33 from the inside to the outside. The three-layer structure is composed of different materials, which include silicon steel or low-carbon steel, copper foil or aluminum foil, and high-nickel alloy from the inside to the outside. At this time, in order to completely eliminate radiation, an additional layer of structure is added between the electric field shielding layer 32 and the far-infrared blackening layer 33. The structure layer is composed of silicon steel or low-carbon steel. Therefore, when used in medical occasions and other situations where the radiation amount is strictly required, the multi-layer radiation shielding layer 3 includes silicon steel or low-carbon steel, copper foil or aluminum foil, silicon steel or low-carbon steel, and high-nickel alloy from the inside to the outside, that is, an additional layer of silicon steel or low-carbon steel is added, and the radiation is completely eliminated by adding this layer.

[0035] In the case of looser requirements for electromagnetic radiation, for example, no one will enter the use environment of the far-infrared heater, or the equipment or objects in the use environment can withstand a certain amount of electromagnetic radiation, and electromagnetic radiation under a certain intensity will not affect the use of the equipment or objects in the environment. In this case, the far-infrared heater used does not need to strictly control the leakage of electromagnetic radiation. At this time, one layer of structure can be reduced in the multi-layer radiation shielding layer 3, for example, only the electromagnetic field shielding layer 31 and the far-infrared blackening layer 33 are retained. Although the shielding effect of this type of far-infrared heater on electromagnetic radiation is not thorough enough, it is acceptable in the case of looser requirements for electromagnetic radiation, because low-intensity electromagnetic radiation does not bring adverse effects, and by reducing the structural layer in the far-infrared heater, the weight of the far-infrared emitter can be reduced, and the production and use costs of the far-infrared emitter can also be reduced.

[0036] In summary, when the far-infrared heater in this embodiment needs to be produced, a heating layer 1 is set at the axis core position, and then the insulating heat-conducting layer 2 is sleeved outside the heating layer 1, so that the insulating heat-conducting layer 2 is tightly fitted with the heating layer 1, and then the multi-layer radiation shielding layer 3 is sleeved outside the insulating heat-conducting layer 2, so that the multi-layer radiation shielding layer 3 is tightly fitted with the insulating heat-conducting layer 2. Before the multi-layer radiation shielding layer 3 is sleeved on the insulating heat-conducting layer 2, the electromagnetic field shielding layer 31, the electric field shielding layer 32 and the far-infrared blackening layer 33 need to be well fitted. First, the electric field shielding layer 32 is sleeved on the outer circle of the electromagnetic field shielding layer 31, so that the electric field shielding layer 32 is tightly fitted with the electromagnetic field shielding layer 31; then the far-infrared blackening layer 33 is sleeved on the electric field shielding layer 32, so that the far-infrared blackening layer 33 is tightly fitted with the electric field shielding layer 32; so at this time, the multi-layer radiation shielding layer 3 is electromagnetic field shielding layer 31, electric field shielding layer 32 and far-infrared blackening layer 33 from inside to outside. After the heating layer 1, the insulating heat-conducting layer 2 and the multi-layer radiation shielding layer 3 are assembled, the far-infrared heater is assembled. At this time, the far-infrared heater can be installed at a location where electric heating is required.

[0037] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made according to the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A far-infrared heater, characterized in that: include: Heating layer: the heating layer is located at the axis core; Insulating heat-conducting layer: the insulating heat-conducting layer is sleeved inside and outside the heating layer; Multi-layer radiation shielding layer: the multi-layer radiation shielding layer is sleeved outside the insulating heat-conducting layer, and the multi-layer radiation shielding layer includes an electromagnetic field shielding layer, an electric field shielding layer and a far-infrared blackening layer; The heating layer, the insulating heat-conducting layer and the multi-layer radiation shielding layer extend continuously along the length direction and have no openings.

2. The far-infrared heater according to claim 1, characterized in that: The electromagnetic field shielding layer is sleeved outside the insulating heat-conducting layer.

3. The far-infrared heater according to claim 2, characterized in that: The electromagnetic field shielding layer is a silicon steel layer or a low carbon steel layer.

4. The far-infrared heater according to claim 3, characterized in that: The thickness of the electromagnetic field shielding layer is 0.6mm-0.8mm.

5. The far-infrared heater according to claim 1, characterized in that: The electric field shielding layer is sleeved outside the electromagnetic field shielding layer.

6. The far-infrared heater according to claim 5, characterized in that: The electric field shielding layer is a copper foil layer or an aluminum foil layer.

7. The far-infrared heater according to claim 6, characterized in that: The thickness of the electric field shielding layer is 0.1 mm-0.3 mm.

8. The far-infrared heater according to claim 1, characterized in that: The far-infrared blackening layer is sleeved outside the electric field shielding layer.

9. The far-infrared heater according to claim 8, characterized in that: The far-infrared blackening layer is a high-nickel alloy layer.

10. The far-infrared heater according to claim 9, characterized in that: The far-infrared blackening layer has a thickness of 0.4 mm to 0.8 mm.

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