Heating device and fan heater

Abstract

The utility model discloses a kind of heating device and fan heater, it is related to the field of household appliances, and heating device includes: shell, coil assembly, heating body and wind wheel, shell is equipped with air inlet and air outlet;Coil assembly is located in shell, coil assembly includes coil support and solenoid, solenoid is located in coil support, air flow channel is equipped in shell, solenoid is located in air flow channel or participates in and defines air flow channel, air flow channel is communicated with air inlet and air outlet respectively;Heating body is located in shell, heating body is configured to heat under the magnetic field effect of solenoid;Wind wheel is located in shell for driving the air entering from air inlet at least part of air flow channel flows to air outlet.The heating device of the utility model embodiment, wind wheel air flow channel sends air, can realize the heat dissipation of solenoid, improve the equipment use safety, can also improve air outlet temperature.

Description

Technical Field

[0001] This application relates to the field of household appliances, and in particular to a heating device and a fan heater. Background Technology

[0002] A fan heater is a type of heater that can quickly raise the room temperature by using forced convection to generate warm air. Fan heaters are also small in size and lightweight, making them particularly suitable for heating small spaces such as homes and offices.

[0003] In related technologies, a warm air heater includes a fan and a heating element. The fan drives air through the heating element, and after heat exchange, the air is blown into the room. However, during the heating process, the temperature radiated from the heating element to the coil and the resistance of the coil wires can cause the local temperature of the coil to become too high, posing a safety risk. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in the related art. Therefore, one objective of this invention is to provide a heating device that can improve the heat dissipation effect of the coil assembly, avoid localized overheating, improve the safety of equipment use, and also increase the outlet air temperature.

[0005] Another objective of this invention is to provide a heater that includes the aforementioned heating device.

[0006] A heating device according to an embodiment of the present invention includes: a housing, a coil assembly, a heating element, and a fan wheel. The housing has an air inlet and an air outlet. The coil assembly is disposed within the housing and includes an electromagnetic coil. An air flow channel is provided within the housing. The electromagnetic coil is located within the air flow channel or participates in defining the air flow channel. The air flow channel is connected to the air inlet and the air outlet, respectively. The heating element is disposed within the housing and is configured to generate heat under the magnetic field of the electromagnetic coil. The fan wheel is disposed within the housing and is used to drive at least a portion of the air entering from the air inlet to flow through the air flow channel to the air outlet.

[0007] According to the heating device of this utility model embodiment, by setting a coil assembly, the heating element can be heated under the magnetic field of the electromagnetic coil, which can improve the heating efficiency of the heating device. At the same time, the fan wheel blows air into the air channel to dissipate heat from the electromagnetic coil, avoid local overheating, improve the safety of the device, and also increase the outlet air temperature.

[0008] In addition, the heating device according to the above embodiments of this utility model may also have the following additional technical features:

[0009] In some examples of this utility model, the impeller includes a first part and a second part, the first part being located inside the coil assembly, and the second part of the impeller being located on the side of the airflow channel facing the air inlet so that a portion of the air entering from the air inlet is directly guided into the airflow channel.

[0010] In some examples of this invention, the outer diameter of the second portion is larger than the outer diameter of the first portion, and the second portion is located outside the coil assembly and is positioned directly opposite the airflow channel to guide airflow into the airflow channel.

[0011] In some examples of this utility model, the length of the overlapping portion of the wind turbine and the heating element along the axial direction of the wind turbine is sj, the total axial length of the wind turbine is Lb, and the heating device satisfies that the range of sj / Lb is 0.3 to 1.0.

[0012] In some examples of this utility model, the coil assembly includes a coil support, an electromagnetic coil disposed on the coil support, a heating element disposed between the coil support and the wind turbine in the radial direction of the impeller, and the heating element and the coil support are arranged radially spaced apart, a portion of the wind turbine is disposed inside the heating element, the electromagnetic coil is disposed on the outer peripheral wall of the coil support away from the heating element, and the airflow channel is located on the outer side of the coil support away from the heating element.

[0013] In some examples of this invention, the heating element is formed in a ring shape.

[0014] In some examples of this utility model, the impeller is a centrifugal impeller, the impeller includes a plurality of blades spaced apart, at least a portion of the blades are located within the heating body, and in the radial direction of the impeller, the outer radial end of the blades blows air toward the airflow channel.

[0015] In some examples of this utility model, the heating device further includes a deflector, which is disposed outside the coil assembly, and the deflector and the coil assembly define the airflow channel.

[0016] In some examples of this invention, the air inlet end of the shroud extends beyond the coil assembly and toward the air inlet to guide airflow from the air inlet to the air channel.

[0017] In some examples of this utility model, the air guide is formed in a ring shape, and the air inlet end of the air guide is located between the wind turbine and the air inlet in the axial direction of the wind turbine.

[0018] In some examples of this utility model, the air inlet end of the air guide is connected to the housing and arranged around the air inlet.

[0019] In some examples of this invention, the cross-section of the guide surface of the inner circumference of the guide shroud gradually increases in the direction from the air inlet to the air outlet.

[0020] In some examples of this utility model, the heating device further includes a shielding component disposed on the air guide cover.

[0021] In some examples of this invention, the shielding element is disposed on the outer peripheral wall of the flow guide shield opposite to the coil assembly.

[0022] The heater according to an embodiment of the present invention includes the aforementioned heating device.

[0023] According to the embodiments of the present invention, by applying the heating device in the aforementioned technical solution to the heater, local overheating of the electromagnetic coil can be avoided, which helps to improve the safety and heating efficiency of the heater during use, thereby increasing the outlet temperature of the hot air and enhancing the user experience.

[0024] In some examples of this utility model, the heater includes a bracket, and the heating device is swayably mounted on the bracket. Attached Figure Description

[0025] Figure 1 This is an exploded view of a heating device according to the first embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the heating device according to the first embodiment of the present utility model;

[0027] Figure 3 yes Figure 2 Cross-sectional view along the AA direction;

[0028] Figure 4 This is a partial structural schematic diagram of a heating device according to the first embodiment of the present utility model;

[0029] Figure 5 yes Figure 4 A cross-sectional view along the BB direction (showing the direction of airflow);

[0030] Figure 6 This is a schematic diagram of the heating device according to the second embodiment of the present utility model;

[0031] Figure 7 yes Figure 6 A cross-sectional view in the CC direction (showing the direction of airflow);

[0032] Figure 8 This is a schematic diagram of the motor structure according to some embodiments of the present invention;

[0033] Figure 9 This is a schematic diagram of the motor structure according to some embodiments of the present invention;

[0034] Figure 10 This is a structural schematic diagram of a heater according to some embodiments of the present utility model;

[0035] Figure 11 Table 1 shows the relationship between different sj / Lb ratios and the temperature and wind speed of the air outlet from the heating device.

[0036] Figure 12 Table 2 shows the relationship between different sj / Lb ratios and the temperature and wind speed of the air outlet from the heating device.

[0037] Figure 13 Table 3 shows the relationship between different sj / Lb values ​​and the temperature and wind speed of the air outlet from the heating device.

[0038] Figure label:

[0039] 1000, Heater; 100, Heating device; 10, Housing; 11, Air inlet grille; 12, Air outlet grille; 101, Air inlet; 102, Air outlet; 110, Inner air duct; 120, Outer air duct; 130, Airflow channel; 20, Heating element; 30, Fan wheel; 31, First part; 32, Second part; 40, Air guide; 50, Coil assembly; 51, Coil bracket; 52, Electromagnetic coil; 60, Shielding component; 70, Motor; 200, Bracket; 300, Drive unit. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0041] Combination Figures 1 to 3 The heating device 100 according to an embodiment of the present invention includes: a housing 10, a coil assembly 50, a heating element 20, and a fan 30. The housing 10 is provided with an air inlet 101 and an air outlet 102. The coil assembly 50 is disposed inside the housing 10, and the fan 30 is disposed inside the housing 10 to drive at least a portion of the air entering from the air inlet 101 to flow through the air flow channel 130 to the air outlet 102. Specifically, the coil assembly 50 includes an electromagnetic coil 52, which generates a magnetic field through a flowing current. The heating element 20 is disposed inside the housing 10 and is configured to generate heat under the action of the magnetic field of the electromagnetic coil 52.

[0042] Specifically, the electromagnetic coil 52 can generate an alternating magnetic field. The heating element 20 can be a conductor or conductive body with free charges that can be driven to heat up by the magnetic field generated by the coil. For example, it can be iron with magnetic properties or aluminum with non-magnetic properties. The heating element 20 can induce eddy currents under the action of the alternating magnetic field, and then generate heat. Thus, the electromagnetic field generated when the electromagnetic coil 52 is energized acts on the heating element 20, causing the heating element 20 to generate eddy currents and generate heat, so that the heating element 20 can heat the air, realizing electromagnetic induction heating. This method has the advantages of uniform heating and rapid response, which is conducive to improving heating efficiency. When the air from the fan wheel 30 is guided from the air inlet 101 to the air outlet 102, the air can flow through the heating element 20, which can heat the air to increase the outlet air temperature of the heating device 100. In other words, the fan wheel 30 can drive the airflow through the heating element 20, heat it, and then blow out hot air to achieve a heating effect.

[0043] Furthermore, an airflow channel 130 is provided inside the housing 10. The electromagnetic coil 52 is located within the airflow channel 130 or participates in defining the airflow channel 130. The airflow channel 130 is connected to the air inlet 101 and the air outlet 102, respectively. Thus, airflow enters the airflow channel 130 and flows through the electromagnetic coil 52, where it can exchange heat with the electromagnetic coil 52, thereby carrying away the heat generated by the electromagnetic coil 52 during operation. This helps to reduce the heat of the coil assembly 50 and avoid local overheating. In addition, the airflow passing through the electromagnetic coil 52 can also heat the airflow, thereby improving the heating effect of the heating device 100 and helping to increase the outlet air temperature.

[0044] According to the embodiment of the present invention, the heating device 100, by setting the coil assembly 50, can heat the heating element 20 under the magnetic field of the electromagnetic coil 52, thereby improving the heating efficiency of the heating device 100. At the same time, the housing 10 is provided with an air flow channel 130, and the fan wheel 30 can guide the airflow from the air inlet 101 into the housing 10 and into the air flow channel 130, and then flow through the electromagnetic coil 52, carrying away the heat of the electromagnetic coil 52 and then dissipating it from the air outlet 102, thereby achieving heat dissipation of the electromagnetic coil 52, avoiding local overheating, improving the safety of the device, and also increasing the outlet air temperature.

[0045] More specifically, in some embodiments of this invention, a portion of the impeller 30 is located on the side of the airflow channel 130 facing the air inlet 101, so that a portion of the air entering from the air inlet 101 is directly driven to the airflow channel 130. This improves the heat dissipation effect on the electromagnetic coil 52 and reduces energy loss. Specifically, when the impeller 30 rotates, air can enter the housing 10 through the air inlet 101, ensuring that the airflow can be driven to the airflow channel 130 to achieve heat dissipation and improve the reliability of the heating device 100.

[0046] Combination Figure 3 In some embodiments of this utility model, the impeller 30 includes a first part 31 and a second part 32. The outer diameter of the second part 32 is larger than the outer diameter of the first part 31. At least a portion of the first part 31 is located inside the coil assembly 50. The first part 31 of the impeller 30 can deliver air to the inside of the coil assembly 50, driving the airflow to be delivered along the axial direction of the impeller 30, and can also deliver air to the heating element 20. For example, the impeller 30 can deliver air to the inside of the coil assembly 50 to achieve heat dissipation on the inside of the coil assembly 50 or deliver air to the heating element 20 to achieve heat dissipation on the heating element 20. The second part 32 of the impeller 30 is located outside the coil assembly 50 and is directly opposite the airflow channel 130, which facilitates the airflow to the airflow channel 130, shortens the airflow path, improves the air delivery effect of the impeller 30 to the airflow channel 130, reduces energy loss, and thus improves the heat exchange effect of the coil assembly 50.

[0047] Furthermore, the arrangement of the first part 31 of the impeller 30 being located inside the coil assembly 50 and the second part 32 being located outside the coil assembly 50 can appropriately increase the radial dimension of the impeller 30, thereby increasing the air delivery range of the impeller 30. This allows the airflow to fully exchange heat with the components within the housing 10, thus improving the heat dissipation effect of the device. In addition to improving the air delivery effect, the impeller 30 can also improve the compactness of the heating device 100, appropriately reducing the axial dimension of the heating device 100 and avoiding excessive overall thickness of the device.

[0048] Combination Figure 5 In some embodiments of this utility model, the length of the overlapping portion of the impeller 30 and the heating element 20 along the axial direction of the impeller 30 is sj, and the total axial length of the impeller 30 is Lb. The heating device 100 satisfies the condition that sj / Lb is in the range of 0.3 to 1.0, which can better combine the heating function of the heating element 20 with the airflow generated by the impeller 30, thereby reducing wind resistance and increasing the airflow speed and heating effect. Specifically, when the axial length L of the impeller 30, the axial length of the heating element 20, and the arrangement length of the electromagnetic coil remain unchanged, combined with... Figures 11 to 13If the value of sj / Lb is less than 0.3, the overall length of the heating device 100 will be too long, increasing wind resistance and affecting the air outlet speed of the heating device 100. If the condition of sj / Lb being less than 0.3 remains unchanged, in order to reduce the overall length of the heating device 100, the axial length of the heating element 20 and the arrangement length of the electromagnetic coil are reduced, which will reduce the area of ​​the heating element 20 that is heated, resulting in a slower air heating speed and affecting the heating effect. In the axial direction of the impeller 30, the impeller 30 is at least partially located outside the heating element 20, so the value of sj / Lb is less than 1, which is beneficial for air to enter the inner air duct 110 and the outer air duct 120 better. For example, the value of sj / Lb can be 0.4, 0.6, or 0.8.

[0049] Depend on Figures 11 to 13 It can be seen that when the value of sj / Lb is equal to 1, the blades of the impeller 30 are completely located inside the heating element 20, and the air blown out by the impeller 30 can be directly blown towards the inner wall of the heating element 20, which increases the contact area between the inner wall of the heating element 20 and the air, which not only improves the heating efficiency of the air, but also improves the air guiding effect.

[0050] Reference Figure 11 and Figure 12 When the value of sj / Lb is less than 1, at least a portion of the blades of the impeller 30 are located outside the heating element 20 in the axial direction of the impeller 30, so that the air blown out by the impeller 30 can flow to the outside of the heating element 20, so that a portion of the air can exchange heat with the inner wall of the heating element 20 and another portion of the air can exchange heat with the outer wall of the heating element 20. In addition, the air blown to the outside of the heating element 20 can also dissipate heat to other components outside the heating element, thereby increasing the heating speed of the air and effectively improving the heating effect of the heating device 100.

[0051] Combination Figure 3 and Figure 5In some embodiments of this utility model, the coil assembly 50 includes a coil support 51, and an electromagnetic coil 52 is disposed on the coil support 51. The coil support 51 ensures that the electromagnetic coil 52 maintains a stable position during operation, which is beneficial to improving structural stability. The coil support 51 can be made of insulating material to balance strength and insulation. The electromagnetic coil 52 generates a magnetic field through the flowing current. The heating element 20 is disposed inside the housing 10 and is configured to generate heat under the action of the magnetic field of the electromagnetic coil 52. In the radial direction of the impeller 30, the heating element 20 is disposed between the coil support 51 and the impeller 30. A portion of the impeller 30 is disposed inside the heating element 20, so that the impeller 30 can blow air into the inside of the heating element 20 to achieve heat dissipation. The electromagnetic coil 52 is disposed on the outer peripheral wall of the coil support 51 away from the heating element 20, so that the electromagnetic coil 52 can be spaced apart from the heating element 20, thereby avoiding local overheating, and airflow can flow through the gap, achieving a heat dissipation effect. The heating element 20 and the coil support 51 are arranged radially at intervals, so that airflow can also flow through the gap formed by the coil support 51 and the heating element 20. Thus, airflow channels can be formed on the relatively inner side of the electromagnetic coil, such as both the inner and outer sides, or the airflow channel 130 can include inner and outer channels, which are located on the inner and outer sides of the electromagnetic coil, respectively, thereby improving the heat dissipation effect of the coil.

[0052] Furthermore, the airflow channel 130 is located on the outer side of the coil support 51 away from the heating element 20. When the airflow flows in the airflow channel 130, it can directly exchange heat with the electromagnetic coil 52, which is beneficial to improve the heat dissipation effect of the electromagnetic coil 52 and can directly dissipate heat on the outer side of the coil support 51.

[0053] Optionally, the heating element 20 is formed in a ring shape, which facilitates its cooperation with the coil support 51 and the impeller 30, thereby improving the heat exchange and flow guiding effect.

[0054] According to a specific embodiment of the present invention, in conjunction with Figure 3The first part 31 of the impeller 30 can dissipate heat to the inside of the heating element 20, and the second part 32 of the impeller 30 can dissipate heat to the outside of the heating element 20 and to the inside of the coil support 51 or the electromagnetic coil 52. An inner air duct 110 can be constructed on the inside of the heating element 20, and an outer air duct 120 can be constructed between the outside of the heating element 20 and the inside of the coil support 51. The first part 31 of the impeller 30 extends into the inside of the heating element 20, and the second part 32 of the impeller 30 located on the outside of the heating element 20 is positioned opposite the outer air duct 120 to deliver air towards the outer air duct 120. When the fan wheel 30 is working, it can simultaneously send air to the inner air duct 110 and the outer air duct 120, so that the airflow can carry away the heat inside and outside the heating element 20, realizing double-sided heat dissipation inside and outside the heating element 20, which helps to improve the heat dissipation effect of the heating element 20 and improve the safety during use. In addition, the heat exchange between the airflow and the heating element 20 can also make the heating device 100 blow out more hot air, which helps to improve energy utilization, improve the heating efficiency and heating effect of the heating device 100, and make people feel comfortable.

[0055] In other words, to better dissipate the heat from the heating element 20 and improve efficiency while addressing the temperature rise issue, this invention designs heat dissipation ducts on both the inner and outer sides of the heating element 20. Under the action of the centrifugal impeller 30, part of the air is thrown towards the inner surface of the heating element 20, and the other part is thrown towards the outer surface, forming two airflows. These two airflows move forward along the heating element 20, achieving simultaneous heating and airflow guidance both inside and outside the heating element 20, realizing double-sided heat dissipation. Furthermore, the increased heat dissipation surface area also improves heating efficiency.

[0056] Furthermore, the axial length of the impeller 30 is greater than the axial length of the heating element 20. Since the rear half of the impeller 30 is open, the airflow from the rear half of the impeller 30 can flow through the air ducts on both sides of the heating element 20. The airflow from the impeller 30 can also sweep across the surface of the electromagnetic coil 52, thereby achieving heat dissipation of the coil assembly 50. Therefore, the heating device 100 is simultaneously provided with an inner air duct 110, an outer air duct 120, and an air flow channel 130. The impeller 30 can deliver air to the inner air duct 110, the outer air duct 120, and the air flow channel 130, thereby dissipating heat from the inside and outside of the heating element 20 and the coil assembly 50, which helps to improve the heat dissipation effect of the heating device 100.

[0057] from Figure 5 As can be seen, since heat dissipation ducts are designed both inside and outside the heating element 20, the airflow from the impeller 30 can enter the heat dissipation ducts to achieve double-sided heat dissipation of the heating element 20. Thus, airflow flows through both the inner and outer sides of the heating element 20, realizing double-sided convection heat exchange, solving the problem of local overheating, and improving the heating efficiency of the electromagnetic heating method.

[0058] Furthermore, combining Figure 3 and Figure 7 In some embodiments of this utility model, the heating device 100 further includes a deflector 40, which is disposed outside the coil assembly 50. An airflow channel 130 is defined between the deflector 40 and the coil assembly 50. The deflector 40 can separate the coil assembly 50 and the housing 10, thereby reducing the impact of heat from the coil assembly 50 on the housing 10, protecting the housing 10, and preventing damage to the housing 10 or heat buildup on the outside of the device. Furthermore, the airflow channel 130 defined between the inner wall of the deflector 40 and the outer side of the coil assembly 50 can limit the size of the airflow channel 130, preventing it from becoming too large and causing airflow dispersion. Therefore, the deflector 40 helps improve heat dissipation.

[0059] Combination Figure 7 In some other embodiments of this utility model, the air inlet end of the air guide shroud 40 extends out of the coil assembly 50 and toward the air inlet 101 to guide the airflow from the air inlet 101 to the air channel 130. In this way, the air guide shroud 40 can connect the air inlet 101 and the air channel 130 to guide the airflow from the air inlet 101 to the air channel 130, so that the airflow flows from the air inlet 101 through the air channel 130 and then flows out from the air outlet 102, thereby ensuring that the airflow can pass through the coil assembly 50 to dissipate heat from the coil assembly 50 or the bracket 51 and the electromagnetic coil 52, and blow out the heated airflow to improve the heating effect of the heating device 100.

[0060] In some embodiments of this utility model, the air guide shroud 40 is formed in an annular shape, with the air inlet end of the air guide shroud 40 located between the impeller 30 and the air inlet 101 along the axial direction of the impeller 30. Specifically, the air guide shroud 40 is annular and suitable for covering the outside of the coil assembly 50 and the impeller 30. On the one hand, it can protect the coil assembly 50 and the impeller 30. On the other hand, the air guide shroud 40 can also guide the air from the air inlet 101 to the coil assembly 50 or the heating element 20, so that the air can flow more smoothly to the coil assembly 50 or the heating element 20 after entering the housing 10. This can guide the airflow and avoid the formation of vortex areas, thereby improving the heat dissipation effect and heating efficiency. Specifically, since the impeller 30 is designed to be relatively long in the axial direction, the front part is wrapped inside the heating element 20 while the rear part is exposed. Since the rear part of the impeller 30 is far from the coil assembly 50, the airflow is prone to backflow after being thrown out of the impeller 30. Therefore, a guide structure is set on the outer side of the rear part of the impeller 30 to avoid the formation of vortex areas in the airflow and to improve the airflow effect.

[0061] Combination Figure 7In some embodiments of this utility model, the air inlet end of the air guide 40 is connected to the housing 10. The air guide 40 is directly connected to the housing 10, which can improve the stability of the air guide 40 after connection. Moreover, the air guide 40 is arranged around the air inlet 101 to improve the air guiding effect of the air guide 40 and reduce energy loss.

[0062] Combination Figure 7 In some embodiments of this utility model, in the direction from the air inlet 101 to the air outlet 102, the cross-section of the guide surface of the inner circumference of the guide shroud 40 gradually increases at least partially. In this way, as the airflow flows from the air inlet 101 to the air outlet 102, the flow range gradually increases, allowing the airflow to pass through multiple components inside the housing 10, which is beneficial to improving the heat dissipation effect and also beneficial to improving the temperature, air volume and air uniformity of the air outlet 102, thereby improving the user's comfort during use.

[0063] In some embodiments of this utility model, the heating device 100 further includes a shield 60, which is disposed on the air guide shroud 40. Specifically, the air guide shroud 40 facilitates the assembly of the shield 60 and improves the structural stability after assembly. The magnetic field generated by the electromagnetic coil 52 can interact with the shield 60 to produce a magnetic effect. In practical applications, the airflow channel 130 constructed between the coil assembly 50 or the coil support 51 and the air guide shroud 40 can also remove the heat generated by the electromagnetic coil 52 and the shield 60, thereby improving the heating effect of the heating device 100. More specifically, since alternating magnetic fields are generated on both sides of the coil assembly 50, a heating element 20 is provided on one side and a shield 60 is provided on the other side. The heating element 20 can be made of a heat-generating metal material, which generates a large amount of heat under magnetic field induction; while the shield 60 is made of a ferrite magnetic material, which generates very little heat under magnetic field induction, and can better concentrate the magnetic field to the heating element 20 side.

[0064] In some embodiments of this utility model, the shield 60 is disposed on the outer peripheral wall of the air guide 40 away from the coil assembly 50. As a result, the side of the air guide 40 facing the coil assembly 50 is relatively flat, which can reduce the resistance to airflow and improve the air outlet effect.

[0065] Optionally, combined Figure 2 The heating device 100 also includes a motor 70, which is located inside the housing 10. The motor 70 is used to drive the fan wheel 30 to rotate. The fan wheel 30 drives air to enter from the air inlet 101, and the driven air flows through the heating element 20 and is blown out through the air outlet 102.

[0066] In some embodiments of this utility model, the impeller 30 is a centrifugal impeller, which includes a plurality of blades spaced apart. At least a portion of the blades is located inside the heating element 20. In the radial direction of the impeller 30, the outer radial end of the blades blows air toward the airflow channel 130.

[0067] Optionally, the wind turbine 30 can be a backward-curved centrifugal wind turbine or a forward-curved centrifugal wind turbine, such as... Figure 8 and 9 As shown. The wind turbine 30 can be a non-uniform diameter wind turbine, such as... Figure 1 As shown, it can also be a wind turbine with a constant diameter, such as... Figure 7 As shown. Specifically, in conjunction with Figure 7 When the impeller 30 is a constant diameter impeller, a part of the impeller 30 extends into the inner side of the heat source 20, i.e. the front end, and the other part extends toward the air inlet 101. The guide shroud 40 can better guide the airflow of the other part of the impeller, i.e. the rear end, toward the airflow channel 130 and / or the outer airflow channel 120 to achieve the heat dissipation effect.

[0068] In some further embodiments, combined with Figure 1 An air inlet screen 11 is provided at the air inlet 101 of the housing 10, and an air outlet screen 12 is provided at the air outlet 102 of the housing 10. At least one of the air inlet screen 11 and the air outlet screen 12 is detachably provided to the housing 10, so that the user can remove the air inlet screen 11 and / or the air outlet screen 12 for cleaning, and it is also convenient for the user to clean and maintain the internal structure of the housing 10, thereby improving the ease of use of the heating device 100.

[0069] In this embodiment, the housing 10 can provide positioning support for structures such as the motor 70, the impeller 30, and the heating element 20, ensuring the overall stability of the heating device 100. Furthermore, the motor 70, the impeller 30, the heating element 20, and the coil assembly 50 are all housed within the housing 10. Through the protection of the housing 10, the risk of interference between the motor 70, the impeller 30, the heating element 20, and the coil assembly 50 and external structures is reduced, thereby reducing the risk of damage to the heating device 100 and extending its service life.

[0070] According to the embodiment of the present utility model, by applying the heating device 100 in the aforementioned technical solution to the heater, local overheating of the electromagnetic coil 52 can be avoided, improving the safety of the equipment, which is conducive to improving the safety and heating efficiency of the heater during use, thereby increasing the outlet temperature of the hot air and enhancing the user experience.

[0071] The following describes two assembly methods of the heating device 100 based on the structure of the heating device 100 according to an embodiment of the present utility model.

[0072] Assembly Method 1: The electromagnetic coil 52 is installed on the coil bracket 51, and the heating element 20 is fixedly connected to the coil bracket 51. The shield 60 and the air guide 40 can be an integral part. The shield 60 is sleeved on the radial outer side of the coil bracket 51 and fixedly connected to the coil bracket 51. The impeller 30 can be positioned in the center area of ​​the heating element 20 by hand, thereby realizing the modular assembly of the heating element 20, the coil assembly 50, the shield and the impeller 30. Then, the above components are placed into the housing 10, and the coil bracket 51 and the impeller 30 are further connected to the housing 10 respectively. Finally, the air inlet mesh 11 is installed at the air inlet 101 of the housing 10 to complete the assembly of the heating device 100.

[0073] In order to ensure the assembly reliability of the components inside the housing 10 with the housing 10, 60 can be further connected to the housing 10 to reduce the risk of the components inside the housing 10 falling off the housing 10.

[0074] Assembly Method 2: First, the heating element 20 is fixedly installed inside the housing 10. Then, the coil bracket 51, on which the electromagnetic coil 52 is installed, is fitted onto the radial outer side of the heating element 20, and the coil bracket 51 is fixedly connected to the housing 10. Then, the shield 60 and the air guide 40 are fitted onto the radial outer side of the coil bracket 51 and fixedly connected to the housing 10. Then, the fan wheel 30 is positioned and installed in the central area of ​​the heating element 20, and the air inlet mesh 11 is installed at the air inlet 101 of the housing 10 to complete the assembly of the heating device 100.

[0075] It should be noted that the above-mentioned fixed connection methods can all use threaded connectors to fix the components together, so as to facilitate the disassembly, maintenance and cleaning of the heating device 100. Of course, it is understood that the fixed connection methods include but are not limited to connecting with threaded connectors, or snap-fitting, etc. The specific fixed connection method can be determined according to the actual production requirements, and no specific limitation is made here.

[0076] Combination Figure 10 In some embodiments of this utility model, the heater 1000 includes a bracket 200, and the heating device 100 is swayably mounted on the bracket 200, for example, it can be mounted on the top of the bracket 200. When in use, the heating device 100 can sway to adjust the airflow direction, providing convenience for the user.

[0077] Furthermore, the heater 1000 may also include a drive unit 300 for driving the heating device 100 to oscillate.

[0078] Optionally, the heater 1000 may also include a base detachably connected to the heating unit 100. This design facilitates the assembly and disassembly of the device, making it more flexible, easier to move, and easier to maintain. The base provides stable support, helping to maintain the stability of the entire heater 1000, reducing shaking and swaying during operation, and improving the safety and reliability of the device.

[0079] Furthermore, since the base is detachably connected to the air conditioning equipment, different heating devices can be selected as needed, making the heater 1000 more widely applicable and flexible. The drive unit 300 can be mounted on the base.

[0080] In some embodiments, when the heater 1000 is actually in use, the air inlet 101 is located on the rear side of the housing 10, and the air outlet 102 is located on the front side of the housing 10. That is, the heater 1000 takes in air from the rear side and outputs airflow forward.

[0081] In some embodiments of this utility model, the heater 1000 has a cold air operation mode and a warm air operation mode. The control method further includes determining the operation mode of the heater, thereby setting the heater to operate in cold air mode or warm air mode according to the user's selection, ensuring that the heater 1000 can provide suitable air output according to the user's usage needs, which is beneficial to improving the functionality of the heater.

[0082] Based on this, the operating mode of the heater 1000 can be controlled by controlling the operating status of the fan wheel 30 and the heating element 20. When the heater 1000 is in the cold air operating mode, the fan wheel 30 can be started to generate cold air, while the heating element 20 does not work, so as to ensure that the heater 1000 can provide pure cold air, so that the heater 1000 can be used to cool down the environment with high temperature, and at the same time, it helps to reduce the energy consumption of the heater 1000.

[0083] It should be noted that when the heater 1000 is started and selected to run in cold air mode, there is no action to stop the heating element 20. However, if the heater 1000 switches from warm air mode to cold air mode, there is an action to stop the heating element 20.

[0084] When the heater 1000 is in the warm air operation mode, the fan wheel 30 and the heating element 20 work simultaneously to ensure that the heater 1000 can output hot air, so that the heater 1000 can be used to heat the environment with low temperature.

[0085] In some embodiments, the cold air operation mode of the heater 1000 needs to ensure that the output air speed of the heater 1000 is high enough. That is, the number of speed settings in the cold air operation mode of the heater 1000 is greater than the number of speed settings in the warm air operation mode, and the maximum air speed in the cold air operation mode is greater than the maximum air speed in the warm air operation mode. For example, the heater 1000 can have 8 speed settings in the cold air operation mode and 3 speed settings in the warm air operation mode. When the heater 1000 switches directly from the 3rd speed setting in the cold air mode to the warm air mode, the heater 1000 operates at the maximum speed setting (i.e., the third speed setting) in the warm air mode, and the output heat of the heater 1000 is most efficient.

[0086] The heating device 100 of this utility model is described below with reference to the accompanying drawings.

[0087] The heating device 100 according to the first embodiment of this utility model, such as Figures 1 to 5 As shown, the heating device 100 mainly includes a shell, a motor 70, a heating element 20, a fan 30, a coil assembly 50, a shield 60, and a deflector 40. The motor 70 and the fan 30 are located inside the heating element 20, the coil assembly 50 is located outside the heating element 20, and outwards are the deflector 40, the shield 60, and the shell. Furthermore, to ensure airflow both inside and outside the heating element 20, in the air outlet direction, the front end of the fan 30 is enclosed inside the heating element 20, while the rear end of the fan 30 is not enclosed. (See [reference]). Figure 5 .

[0088] According to the second embodiment of the present invention, the heating device 100, such as Figures 6 to 9 As shown, it mainly includes a housing 10, a motor 70, a heating element 20, a fan 30, a coil assembly 50, a shield 60, and a flow guide 40. Compared to the heating device of the first embodiment of this utility model, the difference lies in that the fan 30 of the heating device in the second embodiment of this utility model is a constant-diameter fan, and the flow guide 40 is provided with a shield 60, which can be integrated with the shield 60. Because the fan 30 is designed to be relatively long axially: the front part is wrapped inside the heating element 20, while the rear part of the fan 30 is exposed. Since the rear part of the fan 30 is far from the coil assembly 50, the airflow easily forms a backflow after being thrown out of the fan 30. Therefore, a flow guide structure, i.e., a flow guide 40, needs to be designed on the outer side of the rear part of the fan 30.

[0089] Specifically, in combination Figure 7St represents the distance between the right end of the heating element 20 and the right end of the coil assembly 50 in the axial airflow direction. This means the axial length of the coil assembly 50 is greater than the axial length of the heating element 20 to ensure the heating element 20 functions fully. St ranges from 5mm to 15mm; for example, St can be 10mm. Sd represents the distance from the starting end to the ending end of the guide shroud 40 in the axial direction. The starting end is the rightmost end of the coil assembly 50, and Sd ranges from 70mm to 90mm. This improves the airflow guiding effect of the guide shroud 40, thus enhancing heat dissipation and airflow performance. For example, Sd can be 80mm. Si represents the minimum distance between the starting end of the guide shroud 40 and the coil assembly 50, ranging from 8mm to 15mm. This limits the distance between the starting end of the guide shroud 40 and the coil assembly 50, guiding airflow into this gap, improving heat dissipation for the coil assembly 50, ensuring airflow performance, and reducing airflow resistance. For example, Si can be 10mm or 12mm. Sb represents the minimum distance between the end of the air guide shroud 40 and the impeller 30, ranging from 8mm to 12mm. Therefore, after air enters from the air inlet 101, it can enter the area between the impeller 30 and the air guide shroud 40 through this distance and be guided by the air guide shroud 40. Under the action of the air guide structure, the airflow can more smoothly enter the heat dissipation ducts inside and outside the heat source 20. (See [reference]). Figure 7 Therefore, by utilizing the equal-diameter impeller 30 and the flow guiding structure, airflow is allowed to pass through both the inner and outer sides of the heating element 20, achieving double-sided convection heat transfer, solving the problem of local overheating, and improving the heating efficiency of electromagnetic heating.

[0090] In the description of this utility model, it should be understood that the terms "length", "thickness", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0091] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0092] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0093] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0094] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0095] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A heating device, characterized in that, include: The housing is provided with an air inlet and an air outlet; A coil assembly is disposed within the housing. The coil assembly includes an electromagnetic coil. An airflow channel is provided within the housing. The electromagnetic coil is located within the airflow channel or participates in defining the airflow channel. The airflow channel is connected to the air inlet and the air outlet, respectively. A heating element is disposed within the housing and is configured to generate heat under the influence of the magnetic field of the electromagnetic coil. A wind turbine, disposed within the housing, is used to drive at least a portion of the air entering from the air inlet to flow through the air channel to the air outlet.

2. The heating device according to claim 1, characterized in that, The impeller includes a first part and a second part, at least a portion of the first part is located inside the coil assembly, and the second part is located on the side of the airflow channel facing the air inlet so as to directly drive a portion of the air entering from the air inlet into the airflow channel.

3. The heating device according to claim 2, characterized in that, The outer diameter of the second part is larger than that of the first part. The second part is located outside the coil assembly and is positioned directly opposite the airflow channel to guide airflow into the airflow channel.

4. The heating device according to claim 2, characterized in that, Along the axial direction of the wind turbine, the length of the overlapping portion of the wind turbine and the heating element is sj, the total axial length of the wind turbine is Lb, and the heating device satisfies that the range of sj / Lb is 0.3 to 1.

0.

5. The heating device according to claim 2, characterized in that, It also includes a deflector, which is disposed outside the coil assembly, and the deflector and the coil assembly define the airflow channel.

6. The heating device according to claim 5, characterized in that, The air inlet end of the shroud extends beyond the coil assembly and toward the air inlet to guide airflow from the air inlet to the air channel.

7. The heating device according to claim 6, characterized in that, The air guide is formed in a ring shape, and the air inlet end of the air guide is located between the wind turbine and the air inlet along the axial direction of the wind turbine.

8. The heating device according to claim 7, characterized in that, The air inlet end of the air guide is connected to the housing and is arranged around the air inlet; and / or In the direction from the air inlet to the air outlet, the cross-section of the guide surface on the inner circumference of the air guide shroud gradually increases at least partially.

9. The heating device according to claim 5, characterized in that, It also includes a shielding component, which is disposed on the flow guide.

10. The heating device according to claim 9, characterized in that, The shielding element is disposed on the outer peripheral wall of the flow guide shroud opposite to the coil assembly.

11. The heating device according to any one of claims 1-10, characterized in that, The coil assembly includes a coil support, an electromagnetic coil disposed on the coil support in the radial direction of the impeller, a heating element disposed between the coil support and the impeller, and the heating element and the coil support are arranged radially spaced apart, a portion of the impeller is disposed inside the heating element, the electromagnetic coil is disposed on the outer peripheral wall of the coil support opposite to the heating element, and the airflow channel is located on the outer side of the coil support opposite to the heating element; and / or The heating element is formed in a ring shape; and / or The impeller is a centrifugal impeller, which includes a plurality of blades spaced apart. At least a portion of the blades is located within the heating element. In the radial direction of the impeller, the outer radial ends of the blades blow air toward the airflow channel.

12. A space heater, characterized in that, Includes the heating device according to any one of claims 1-11.

13. The warm air blower according to claim 12, characterized in that, Includes a support frame, on which the heating device is swayably mounted.

Images