Efficient induction air heater

Abstract

The utility model relates to the technical field of air heating, in particular to a high-efficiency induction air heater which comprises an alternating magnetic field generation module and a movable mechanism, and the movable mechanism is located in the range of an alternating magnetic field generated by the alternating magnetic field generation module so that the movable mechanism in contact with air can generate heat through magnetic induction and drive the air to flow. The alternating magnetic field generation module comprises an induction coil and a power supply device, the movable mechanism comprises an airflow driving part made of a magnetic material, the power supply device is electrically connected to the induction coil, and at least one part of the airflow driving part is located in the space in the induction coil; high-frequency alternating current is introduced into the induction coil through the power supply device so that the induction coil can generate an alternating magnetic field promoting heating of the interior of the airflow driving part, and the airflow driving part synchronously drives air to flow while heating. According to the scheme, the heating speed can be increased, the heating efficiency is improved, and the energy consumption of the air heater in the air heating process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air heaters, space heaters, ventilation and air processing machines, in particular to a high-efficiency induction air heater. Background Art

[0002] An air heater is an electric heating device that heats a gas flow, and can be set in a variety of airflow output devices such as fans, hair dryers, and electric heaters. For example, the Chinese utility model patent with patent number CN202022645537.7 discloses an electric air heating pipe, whose structure roughly includes a motor, an air intake fan, and a heating pipe. When working, the motor drives the air intake fan to inhale external air and output it forward. When the airflow is output, it passes through the inside of the heating pipe, and the heat of the heating pipe is used to heat the output airflow, thereby achieving the heating effect of the air. The heat of the above-mentioned heating pipe is mainly passed through the resistance heating wire. The various existing air heaters that use resistance heating technology have high energy consumption, low efficiency, and safety and reliability problems. That is, the disadvantages of the air heater using resistance heating are slow heating speed and high energy consumption, resulting in relatively low heating efficiency, and poor safety and reliability. Utility Model Content

[0003] The present invention aims to overcome at least one defect (shortcoming) in the prior art and provide a high-efficiency induction air heater, which can be beneficial to increase the heating speed and improve the heating efficiency, so as to reduce the energy consumption of the air heater in the process of heating the air.

[0004] From the existing technical theory, we know that the process of induction heating is to use electromagnetic action to induce current in the heated material. Induction heating is based on the principle of transformer, which is: a primary winding is set to form a coil, and by passing alternating current through the primary winding, the coil is magnetically coupled with the heated material (as the secondary), and when the alternating current passes through the primary winding, a current is induced in the material.

[0005] The utility model combines the above technical theories to provide a high-efficiency induction air heater, which can reduce energy consumption to make up for the shortcomings of the prior art. The specific technical solutions are as follows:

[0006] A high-efficiency induction air heater comprises an alternating magnetic field generating module and a movable mechanism, wherein the movable mechanism is within the alternating magnetic field range generated by the alternating magnetic field generating module, so that the movable mechanism in contact with air generates magnetic induction heat and drives air flow.

[0007] According to a high-efficiency induction air heater of the utility model, the alternating magnetic field generating module includes an induction coil and a power supply device, the movable mechanism includes an airflow driving component made of a magnetic material, the power supply device is electrically connected to the induction coil, and at least a portion of the airflow driving component is located in the inner space of the induction coil; a high-frequency alternating current is passed through the induction coil through the power supply device so that the induction coil generates an alternating magnetic field that causes the airflow driving component to generate heat inside, and the airflow driving component drives the air to flow synchronously while generating heat.

[0008] According to a high-efficiency induction air heater of the utility model, the airflow driving component is a centrifugal fan, an axial flow fan or a cross flow fan, a rotating disk is arranged in the middle of the centrifugal fan, the axial flow fan or the cross flow fan, a rotating shaft is coaxially connected to the center of the rotating disk, and the rotating shaft is transmission-connected to a motor.

[0009] According to a high-efficiency induction air heater of the utility model, at least one blade of the centrifugal fan, axial flow fan or cross flow fan is made of a magnetic material, and at least a part of the blade is located in the inner space of the induction coil.

[0010] According to a high-efficiency induction air heater of the utility model, at least one blade of the centrifugal fan, axial flow fan or cross flow fan is made of magnetic material, and the blade passes through the inner space of the induction coil during operation.

[0011] According to a high-efficiency induction air heater of the utility model, the number of the induction coils is several, and the induction coils are arranged in a straight line or circumferentially; the induction coils are electrically connected to different power supply devices respectively; and the fan blades pass through the inner space of each induction coil in sequence during operation.

[0012] According to the high-efficiency induction air heater of the utility model, the blades of the centrifugal fan are arc-shaped blades, and arc-shaped air outlet gaps are formed between the blades.

[0013] According to the high-efficiency induction air heater of the utility model, a plurality of through holes are opened on the rotating disk of the centrifugal fan, and each of the through holes is distributed circumferentially and surrounds the rotation center of the rotating disk.

[0014] According to a high-efficiency induction air heater of the utility model, the centrifugal fan further comprises at least one reinforcement ring, and the reinforcement ring is respectively connected to each of the fan blades along the arrangement trajectory of each of the fan blades.

[0015] According to the high-efficiency induction air heater of the utility model, the induction coil is wound into a circular, elliptical or polygonal shape.

[0016] According to the high-efficiency induction air heater of the utility model, the induction coil is wound into one or more layers.

[0017] The utility model discloses a high-efficiency induction air heater in which an airflow driving component is arranged in an induction coil. When working, a high-frequency alternating current is supplied to the induction coil by a power supply device so that the induction coil generates an alternating magnetic field. The airflow driving component in the induction coil generates eddy currents under the action of the alternating magnetic field. The eddy currents cause the atoms in the airflow driving component to move irregularly at high speed. The atoms collide and rub against each other to generate heat energy, thereby causing the airflow driving component to generate heat inside. The airflow driving component drives the air to flow while generating heat. That is to say, the airflow driving component transfers heat to the air while driving the air to flow, so that the output airflow can be heated synchronously, thereby achieving the effect of efficiently heating the air. The scheme can quickly heat the airflow driving component of the motion mechanism in a shorter time through alternating magnetic field induction heating, and can effectively improve the heating speed and heating efficiency of the airflow, thereby reducing the energy consumption of the air heater in the process of heating the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the first embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the second embodiment of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the third embodiment of the present utility model.

[0023] Reference numerals:

[0024] 1. Induction coil, 2. Power supply device, 3. Airflow driving part, 4. Motor, 5. Rotating shaft, 6. Rotating disk, 61. Through hole, 7. Fan blade, 8. Reinforcement ring. DETAILED DESCRIPTION

[0025] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In the description of the utility model, it is necessary to understand that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or position relationship shown in the accompanying drawings, only for the convenience of describing the utility model 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 limiting the utility model.

[0026] Embodiment 1

[0027] like Figure 1 and Figure 2 As shown, a high-efficiency induction air heater structure of the present embodiment includes an alternating magnetic field generating module and a movable mechanism, wherein the movable mechanism is within the range of the alternating magnetic field generated by the alternating magnetic field generating module, so that the movable mechanism in contact with the air generates magnetic heat and drives the air to flow. Specifically, the alternating magnetic field generating module includes an induction coil 1 and a power supply device 2, the movable mechanism includes an airflow driving member 3, the power supply device 2 is electrically connected to the induction coil 1 and is used to pass current through the induction coil 1, the airflow driving member 3 is made of a magnetic material and is used to drive the air to flow, and optionally, in the present embodiment, the airflow driving member 3 is configured as a centrifugal fan, and at least a portion of the centrifugal fan is located at the induction coil. In the inner space of the induction coil 1, when working, a high-frequency alternating current is passed through the induction coil 1 through the power supply device 2 to make the induction coil 1 generate an alternating magnetic field that causes the inside of the centrifugal fan to heat up. The centrifugal fan drives the air to flow while generating heat. That is, the specific structure of the high-efficiency induction air heater includes a fan with blades made of conductive material (metal, carbon) as heating elements and an electronic power supply device with an induction coil. The alternating current transmitted by the electronic power supply device generates an induced magnetic field through the induction coil. The heating element (fan blade) is configured to interact with the induced magnetic field generated by the induction coil, and the heating element (fan blade) is configured to allow air to flow and heat the air.

[0028] It can be understood that in this embodiment, the airflow driving component 3 is arranged in the induction coil 1, and a high-frequency alternating current is supplied to the induction coil 1 by the power supply device 2 during operation, so that the induction coil 1 generates an alternating magnetic field. The airflow driving component 3 in the induction coil 1 generates eddy currents under the action of the alternating magnetic field. The eddy currents cause the atoms in the airflow driving component 3 to move irregularly at high speed, and the atoms collide and rub against each other to generate heat energy, thereby promoting the heating of the airflow driving component 3. The airflow driving component 3 drives the air to flow while generating heat. That is to say, the airflow driving component 3 transfers heat to the air while driving the air to flow, so that the output airflow can be heated synchronously, thereby achieving the effect of efficiently heating the air. This scheme can quickly heat the airflow driving component of the motion mechanism in a shorter time through alternating magnetic field induction heating, which can effectively improve the heating speed and heating efficiency of the airflow, thereby reducing the energy consumption of the air heater in the process of heating the air.

[0029] In this embodiment, specifically, a rotating disk 6 is provided in the middle of the centrifugal fan, which also includes a motor 4 and a rotating shaft 5. The rotating shaft 5 is transmission-connected to the motor 4, the center of the rotating disk 6 is coaxially connected to the rotating shaft 5, and the blades 7 of the centrifugal fan are made of magnetic material.

[0030] In this embodiment, the blades 7 of the centrifugal fan are located in the inner space of the induction coil 1. The alternating magnetic field generated by the induction coil 1 causes the inner part of the blades 7 to generate heat, so that the blades 7 are in contact with the flowing air while driving the air to flow around. It can be understood that since the centrifugal fan is located in the inner space of the induction coil 1, the alternating magnetic field generated by the induction coil 1 can continuously pass through the centrifugal fan, so that the eddy current is continuously formed inside the centrifugal fan and the heat is continuously generated, which can generate heat more constantly, thereby heating the air flow more constantly.

[0031] In this embodiment, the blades 7 of the centrifugal fan are arc-shaped blades, and arc-shaped air outlet gaps are formed between the blades 7 after being circumferentially arranged. Compared with the straight air outlet gaps formed between straight blades, the arc-shaped air outlet gaps formed by the arc-shaped blades can allow the airflow to contact the blades 7 more fully, so that the heat generated by the blades 7 can be more fully transferred to the airflow, which can make the airflow heat up faster and effectively improve the heating efficiency of the airflow.

[0032] In this embodiment, a plurality of through holes 61 are provided on the rotating disk 6 of the centrifugal fan, and each through hole 61 is distributed circumferentially and surrounds the rotation center of the rotating disk 6. Therefore, when the centrifugal fan rotates, external air can enter the middle part of the centrifugal fan from both sides of the rotating disk 6 at the same time, thereby increasing the amount of airflow supplied to the middle part of the centrifugal fan, so that the hot air flow discharged to the surroundings by the centrifugal fan is larger, which can help to speed up the heating speed of the air in the space.

[0033] In this embodiment, the centrifugal fan further includes at least one reinforcement ring 8, which is respectively connected to each blade 7 along the arrangement trajectory of each blade 7, so as to enhance the structural strength of the centrifugal fan.

[0034] Optionally, the induction coil 1 is wound into a circular, elliptical or polygonal shape by an induction coil wire or tube, and can be wound into one layer or multiple layers.

[0035] Preferably, the conductor material of the induction coil 1 is selected from one or more of copper, aluminum, ferromagnetic alloy, carbon or other conductive alloys or composite materials.

[0036] Preferably, the material of the heating element, ie the fan blade 7, is selected from one or more of steel alloy, copper, aluminum, ferromagnetic alloy, carbon or any other conductive alloy or composite material.

[0037] The heating elements, ie the fan blades 7, can be of any shape design, with any number of blades, and can employ axial, centrifugal or cross-flow designs.

[0038] Optionally, the motor 4 of the fan may be powered by an external driving power source or an electromagnetic field power source of the induction coil 1 .

[0039] Embodiment 2

[0040] like Figure 3 As shown, the difference between this embodiment and the first embodiment is that the airflow driving member 3 is an axial flow fan, and each blade 7 of the axial flow fan is located in the inner space of the induction coil 1. The alternating magnetic field generated by the induction coil 1 causes the inside of the blades 7 of the axial flow fan to generate heat, so that the blades 7 can drive the air to flow while simultaneously transferring heat to the flowing air, and the axial flow fan can blow out a hot air flow forward.

[0041] Embodiment 3

[0042] like Figure 4 As shown, the main difference between this embodiment and the first and second embodiments is that the rotating shaft of the fan and the central axis of the induction coil 1 are perpendicular to each other in space, and the fan blades 7 are not completely in the inner space of the induction coil 1. The fan blades 7 only pass through the inner space of the induction coil 1 during operation, and the alternating magnetic field generated by the induction coil 1 causes the fan blades 7 passing through the inner space of the induction coil 1 to heat up, so that the fan blades 7 are in contact with the flowing air while driving the air to flow. This structure allows the induction coil 1 to intermittently heat the fan blades 7, so that the fan blades 7 that enter the induction coil 1 and are heated can quickly leave the induction coil 1, and to a certain extent, it can prevent the fan blades 7 from melting and deforming due to continuous heating, so that the service life of the fan blades 7 is longer.

[0043] As a further optimization of this embodiment, optionally, the number of induction coils 1 is several, and each induction coil 1 is arranged in a straight line or circumferentially. Optionally, in this embodiment, the number of induction coils 1 is two, and each induction coil 1 is electrically connected to a power supply device 2. The two induction coils 1 are arranged in a straight line and symmetrically distributed on the left and right sides of the fan. The fan blades 7 pass through the inner space of the induction coils 1 on both sides in sequence during operation. It can be understood that in this structure, each induction coil 1 is electrically connected to a different power supply device 2, so that the input current of each induction coil 1 can be controlled by a different induction coil 1, so that it is convenient to input currents of different intensities to each induction coil 1. In practical applications, for example, one of the induction coils 1 can be used to heat and keep the blades 7 at a lower temperature to ensure that the heat of the blades 7 during the rotation process is not lower than the insulation temperature, and another induction coil 1 can be used to quickly heat the blades 7 at a higher temperature, so that the blades 7 can quickly reach a higher working temperature during the rotation process. Therefore, the operation is more flexible and suitable for more usage scenarios.

[0044] Embodiment 4

[0045] The difference between this embodiment and the first embodiment is that the airflow driving member 3 is a cross-flow fan, and all or part of the blades of the cross-flow fan are located in the inner space of the induction coil 1. The alternating magnetic field generated by the induction coil 1 causes the internal heat of the blades of the cross-flow fan to be generated, so that the blades of the cross-flow fan can simultaneously transfer heat and contact the flowing air while driving the air to flow, so that the cross-flow fan can blow out hot air horizontally.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A high efficiency induction air heater, characterized in that: The invention comprises an alternating magnetic field generating module and a movable mechanism, wherein the movable mechanism is within the range of the alternating magnetic field generated by the alternating magnetic field generating module, and the movable mechanism comprises an airflow driving component (3) made of a magnetic material, wherein the airflow driving component (3) generates heat and simultaneously drives air to flow, so that the movable mechanism in contact with the air generates heat by magnetic induction and drives air to flow.

2. The high efficiency induction air heater according to claim 1, characterized in that: The alternating magnetic field generating module comprises an induction coil (1) and a power supply device (2), wherein the power supply device (2) is electrically connected to the induction coil (1), and at least a portion of the airflow driving component (3) is located in the inner space of the induction coil (1); a high-frequency alternating current is passed through the induction coil (1) via the power supply device (2) so that the induction coil (1) generates an alternating magnetic field that causes the airflow driving component (3) to generate heat inside.

3. The high efficiency induction air heater according to claim 2, characterized in that: The airflow driving member (3) is a centrifugal fan, an axial flow fan or a cross flow fan, a rotating disk (6) is arranged in the middle of the centrifugal fan, the axial flow fan or the cross flow fan, the center of the rotating disk (6) is coaxially connected to a rotating shaft (5), and the rotating shaft (5) is drivingly connected to a motor (4).

4. The high efficiency induction air heater according to claim 3, characterized in that: At least one blade (7) of the centrifugal fan, axial flow fan or cross flow fan is made of a magnetic material, and at least a portion of the blade (7) is located in the inner space of the induction coil (1).

5. The high efficiency induction air heater according to claim 3, characterized in that: At least one fan blade (7) of the centrifugal fan, axial flow fan or cross flow fan is made of a magnetic material, and the fan blade (7) passes through the inner space of the induction coil (1) during operation.

6. The high efficiency induction air heater according to claim 5, characterized in that: The number of the induction coils (1) is several, and the induction coils (1) are arranged in a straight line or in a circumferential direction; the induction coils (1) are electrically connected to different power supply devices (2); and the fan blades (7) pass through the inner spaces of the induction coils (1) in sequence during operation.

7. The high efficiency induction air heater according to any one of claims 4 or 5, characterized in that: The blades (7) of the centrifugal fan are arc-shaped blades, and arc-shaped air outlet gaps are formed between the blades (7).

8. The high efficiency induction air heater according to any one of claims 4 or 5, characterized in that: A plurality of through holes (61) are provided on the rotating disk (6) of the centrifugal fan, and each of the through holes (61) is distributed in a circumferential direction and surrounds the rotation center of the rotating disk (6).

9. The high efficiency induction air heater according to any one of claims 4 or 5, characterized in that: The centrifugal fan further comprises at least one reinforcement ring (8), wherein the reinforcement ring (8) is respectively connected to each of the fan blades (7) along the arrangement trajectory of each of the fan blades (7).

10. The high efficiency induction air heater according to claim 2, characterized in that: The induction coil (1) is wound into a circular, elliptical or polygonal shape.

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