Air duct assembly and fan heater

Abstract

The embodiment of the utility model provides an air duct assembly and a fan heater, and relates to the technical field of household appliances. The air duct assembly is applied to the fan heater and comprises an air duct shell, a cross-flow wind wheel and a heating module. The air duct shell is provided with an air guide channel, the cross-flow wind wheel is arranged in the air guide channel, and the center of the cross-flow wind wheel is provided with a containing space. The heating module is arranged in the containing space and fixedly connected to the air duct shell, and the heating module is used for generating heat when powered on. According to the air duct assembly, the heating module is arranged in the cross-flow wind wheel, so that the installation space can be saved, and miniaturization of the size of the whole machine is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to an air duct assembly and a heater. Background Art

[0002] A heater is an electrical appliance for regulating air. Existing heaters often have a heating element at the air outlet, and a fan behind the heating element. After the heating element generates heat, the wind generated by the fan behind is blown out, thereby achieving warm air output. However, the structural layout of placing the heating element in front and the crossflow impeller in the back occupies a large installation space, wastes the air duct space, and the overall volume of the unit is large. At the same time, the structural form of the heating element itself hinders the air volume and air supply distance of the warm air outlet, affecting the air outlet efficiency of the heater. Utility Model Content

[0003] In view of this, an embodiment of the present application provides an air duct assembly and a heater to solve the above-mentioned technical problems.

[0004] According to the first aspect of the present application, an embodiment of the present application provides an air duct assembly, which is applied to a heater. The air duct housing has an air guide channel, a crossflow fan wheel is arranged in the air guide channel, and a receiving space is arranged at the center of the crossflow fan wheel. A heating module is arranged in the receiving space and fixedly connected to the air duct housing, and the heating module is used to generate heat when powered on.

[0005] In some embodiments, the air duct housing includes an air guide plate, a first mounting plate, and a second mounting plate. The first mounting plate and the second mounting plate are arranged relatively spaced apart, and the air guide plate is connected between the first mounting plate and the second mounting plate. The air guide plate, the first mounting plate, and the second mounting plate jointly define an air guide channel, and the two ends of the wind wheel are rotatably connected to the first mounting plate and the second mounting plate, respectively.

[0006] In some embodiments, the air guide channel has an air inlet side and an air outlet side opposite to each other, and the air duct assembly includes an air duct volute tongue. The air duct volute tongue is arranged on the air outlet side and is spaced apart from the air guide plate to form an air outlet channel.

[0007] In some embodiments, the heating module includes a heating element, a first connecting component and a second connecting component. The first connecting component is mounted on a first mounting plate, the second connecting component is disposed between the first connecting component and the second mounting plate and is spaced apart from the first connecting component, and the heating element is connected between the first connecting component and the second connecting component.

[0008] In some embodiments, the heating element includes a plurality of heating fins, each of which is extended along a specified direction, the specified direction is the axial direction of the crossflow wind wheel, and adjacent heating fins are spaced apart to form an air guide gap.

[0009] In some embodiments, the heating plate has a first surface and a second surface that are opposite to each other, the air guide channel has a relative air inlet side and an air outlet side, the first surface faces the air inlet side, the second surface faces the air outlet side, the first surface is a convex surface, and the second surface is a concave surface.

[0010] In some embodiments, the first connection assembly includes a first connection shaft electrically connected to the heating element, and the first connection shaft is used to electrically connect to the main board of the heater to supply power to the heating element. The crossflow impeller includes a first impeller plate and a plurality of blades, one end of the blades is connected to the first impeller plate, the plurality of blades are sequentially arranged at intervals along the circumference of the first impeller plate to form a receiving space, the first connection shaft is rotatably arranged through the first impeller plate, and the heating element is arranged in the receiving space.

[0011] In some embodiments, the first wind wheel plate is provided with a first through hole extending in the axial direction of the crossflow wind wheel. The first connection assembly further includes a first bearing and a first insulating sleeve, the first insulating sleeve is sleeved outside the first connection shaft, and the first bearing is sleeved outside the first insulating sleeve and is disposed in the first through hole.

[0012] In some embodiments, the second connecting assembly includes a second connecting shaft, the crossflow wind wheel also includes a partition plate and a second wind wheel plate, and the second wind wheel plate and the first wind wheel plate are arranged at intervals. The other end of the fan blade is connected to the second wind wheel plate, and the partition plate is located between the first wind wheel plate and the second wind wheel plate. The second connecting shaft is rotatably arranged on the partition plate.

[0013] In some embodiments, the partition plate is connected to the fan blade, and the partition plate is provided with a second through hole extending along the axial direction of the crossflow impeller. The second connection assembly further includes a second bearing and a second insulating sleeve, and the second insulating sleeve is sleeved outside the second connection shaft. The second bearing is sleeved outside the second insulating sleeve and is disposed in the second through hole.

[0014] In some embodiments, the air duct assembly further includes a driving assembly, which is disposed on a side of the second mounting plate away from the air guide channel and connected to a rotating shaft of the crossflow impeller, and is used to drive the crossflow impeller to rotate.

[0015] According to the second aspect of the present application, an embodiment of the application provides a heater, which includes a housing, a main board, and any one of the above-mentioned air duct components. The main board is arranged in the housing, the air duct component is arranged inside the housing, and the heating module is electrically connected to the main board. The housing is provided with an air inlet and an air outlet, and the air inlet, the air guide channel, and the air outlet are connected in sequence.

[0016] Compared with the prior art, the embodiment of the present application provides an air duct assembly, which includes an air duct housing, a crossflow fan wheel and a heating module, and the air duct housing has an air guide channel. Among them, the crossflow fan wheel is arranged in the air guide channel, and the heating module is arranged in the accommodation space in the center of the crossflow fan wheel. On the one hand, it can save the spatial volume of the air guide channel and improve the space utilization rate, thereby effectively reducing the overall size of the heater, which is conducive to realizing the small size of the heater. On the other hand, it can improve the heat transfer efficiency. The heat emitted by the heating module can be transferred to any position of the crossflow fan wheel through thermal radiation and thermal convection, so that the air is heated when entering the crossflow fan wheel and blowing out of the crossflow fan wheel, thereby improving the working efficiency. In addition, the accommodation space in the center of the crossflow fan wheel where the heating module is arranged can also reduce the wind resistance, thereby reducing the air volume loss and improving the air outlet efficiency of the air duct assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the structure of a heater provided in an embodiment of the present application.

[0019] Figure 2 It is a structural schematic diagram of an air duct assembly provided in an embodiment of the present application.

[0020] Figure 3 yes Figure 2 Schematic diagram of the structural explosion of the air duct assembly shown.

[0021] Figure 4 yes Figure 2 A schematic diagram of the structure of the crossflow impeller of the assembly is shown.

[0022] Figure 5 yes Figure 2 A schematic diagram of the structure of the heating module of the component shown.

[0023] Figure 6 2 is a schematic radial section view of the air duct assembly after the crossflow wind wheel structure is removed.

[0024] Figure 7 yes Figure 2 A schematic diagram of an axial cross-section of the air duct assembly shown.

[0025] Figure 8 yes Figure 7 An enlarged schematic diagram of the structure of area A of the air duct assembly is shown.

[0026] Fig. 9 yes Figure 7 An enlarged schematic diagram of the structure of area B of the air duct assembly is shown. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] It should be noted that when an element / component is referred to as being "fixed to" another element / component, it may be directly on the other element / component or there may be an intermediate element / component. When an element / component is considered to be "connected" to another element / component, it may be directly connected to the other element / component or there may be an intermediate element / component at the same time; at the same time, when an element / component is considered to be "connected" to another element / component, it may be integrally formed or assembled with the other element / component. When an element / component is considered to be "set on" another element / component, it may be directly set on the other element / component or there may be an intermediate element / component at the same time.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] See also Figures 1 to 3 , an embodiment of the present application provides an air duct assembly 100. The air duct assembly 100 can be used for air supply equipment. The air duct assembly 100 is in the shape of a long strip frame, and includes an air duct housing 10, a crossflow fan wheel 20 and a heating module 30. The air duct housing 10 has an air guide channel 101, and the air guide channel 101 is used to guide the air to flow in a predetermined direction. The crossflow fan wheel 20 and the heating module 30 are arranged in the air guide channel 101. Specifically, the heating module 30 is installed inside the crossflow fan wheel 20. After the outside air enters the air duct housing 10, it flows to the heating module 30 through the air guide channel 101 to be heated to form hot air, and the hot air then flows to the outside to increase the ambient temperature. The air supply equipment can be a heater 200, a tower fan, an air conditioner, or other air conditioning equipment. In this embodiment, the air supply equipment is a heater 200.

[0031] See also Figure 1 and Figure 2In an embodiment of the present application, a heater 200 is provided. The heater 200 is an electrical appliance for adjusting temperature, which is commonly used for indoor heating to improve the comfort of living and working environments. Due to the portability of the heater 200, it is also suitable for special occasions, such as outdoor activities, temporary places, etc., to provide comfort and convenience to users. In the present embodiment, the heater 200 can be a cross-flow heater. The cross-flow heater 200 has forward multi-wing blades, and the airflow flows through the blades, so that the airflow can reach a long distance. The heater 200 includes the above-mentioned air duct assembly 100 and a housing 201, and the air duct assembly 100 is arranged inside the housing 201. Specifically, a receiving space 202 is provided inside the housing 201, and the receiving space 202 is used to accommodate the air duct assembly 100, a heat dissipation device or other installation components, thereby forming a protection and storage function for the air duct assembly 100 or other installation components.

[0032] In some embodiments, the housing 201 is provided with an air inlet 2011 for air intake and an air outlet 2012 for air discharge, and the air inlet 2011, the air outlet 2012 and the air guide channel 101 are connected to each other. As an example, the air inlet 2011 and the air outlet 2012 are arranged relative to each other and are located on the flow path of the air flow. After the external air flow enters the air guide channel 101 through the air inlet 2011, it is blown outward from the air outlet 2012, so that the external air flow can form an effective heat exchange cycle inside the heater 200, thereby improving the air discharge efficiency. In some embodiments, the air inlet 2011 can also be provided with a grille, a grid or a filter to filter dust and impurities in the inhaled air, keep the air duct assembly 100 clean, and extend the service life of the heater 200. The air outlet 2012 can be provided with a protective grille or other safety measures to prevent the user from directly contacting the high-temperature air and avoid burns.

[0033] In some embodiments, the heater 200 further includes a mainboard 203, which is disposed in a receiving space 202 of the housing 201. The mainboard 203 is used to be electrically connected to the air duct assembly 100. Specifically, the mainboard 203 may include a power module, which is connected to the heating module 30 and is used to provide electrical energy to the heating module 30. The mainboard 203 may also include a control module, which may be a control chip. The control module is electrically connected to the heating module 30, and is used to control the output power of the heating module 30 and thus control the air supply temperature of the heater 200.

[0034] See also Figure 2 and 3In one embodiment provided in the present application, the air duct assembly 100 includes an air duct housing 10, a crossflow impeller 20 and a heating module 30, and the air duct housing 10 has an air guide channel 101. Among them, the crossflow impeller 20 is arranged in the air guide channel 101, and the heating module 30 is arranged in the accommodation space 21 at the center of the crossflow impeller 20. On the one hand, the spatial volume of the air guide channel 101 can be saved and the space utilization rate can be improved, thereby effectively reducing the overall size of the heater 200, which is conducive to realizing the small size of the heater 200. On the other hand, the heat transfer efficiency can be improved, and the heat emitted by the heating module 30 can be transferred to any position of the crossflow impeller 20 by means of heat radiation and heat convection, so that the air is heated when entering the crossflow impeller 20 and blowing out of the crossflow impeller 20, thereby improving the working efficiency. In addition, the heating module 30 is arranged in the accommodation space 21 at the center of the crossflow impeller 20, which can also reduce the wind resistance, thereby reducing the air volume loss and improving the air outlet efficiency of the air duct assembly 100.

[0035] Next, each component of the air duct assembly 100 and the specific structure of each component will be introduced one by one.

[0036] See also Figure 3 In this embodiment, the air duct housing 10 is installed inside the heater 200, and is used to provide an installation basis for the air duct assembly 100, the heat sink (not shown in the figure) or other components, to ensure the stability and reliability of the heater 200 during operation. The air duct housing 10 has an air guide channel 101, which is connected to the outside air, and is used to guide the outside cold air into the heater 200 and then convert it into warm air and effectively transport the hot air to the required area, and can improve the heat exchange efficiency. The material of the air duct housing 10 may include a high temperature resistant and flame retardant plastic material, a thermosetting composite material or a metal material, which can protect the internal components from external damage, and also prevent the air duct housing 10 from being deformed or damaged due to excessive temperature.

[0037] As an example, the material of the air duct housing 10 may include ABS plastic, PC plastic or other hard plastic, which can not only reduce the weight of the heater 200 to achieve lightweight, but also make the air duct housing 10 have a certain stability, thereby effectively protecting the components inside the air duct housing 10. On the other hand, the material has the characteristics of low cost, good plasticity, easy processing, and not easy to break, which can reduce the production cost of the air duct housing 10 and thus reduce the production cost of the heater 200.

[0038] In some embodiments, the inside of the air duct housing 10 may also be filled with an insulation layer (not shown in the figure), which may be glass fiber wool, polyurethane foam, rock wool, etc. The insulation layer has low thermal conductivity and good thermal insulation performance. On the one hand, it can effectively isolate the heat exchange between the internal hot air and the external environment, reduce heat loss, and improve the energy efficiency of the heater 200. On the other hand, it can prevent the outer shell 201 from overheating, reduce the risk of user contact burns, and also extend the service life of the heater 200. In some embodiments, the inside of the air duct housing 10 may also be filled with sound-absorbing materials (not shown in the figure), which may be foam or rubber, etc., so as to reduce the noise generated when the heater 200 is running, while protecting the internal components from impact during transportation and use.

[0039] See also Figure 3 Specifically, the air duct housing 10 includes a first mounting plate 11, a second mounting plate 12 and an air guide plate 13. The first mounting plate 11 and the second mounting plate 12 are used to fix and support the air guide plate 13 or other mounting components. In this embodiment, the first mounting plate 11 and the second mounting plate 12 are arranged at a relative interval, and the two ends of the air guide plate 13 are respectively connected to the first mounting plate 11 and the second mounting plate 12, so that the air guide plate 13, the first mounting plate 11, and the second mounting plate 12 jointly define the air guide channel 101. The crossflow wind wheel 20 is arranged in the air guide channel 101, and the two ends of the crossflow wind wheel 20 are respectively rotatably connected to the first mounting plate 11 and the second mounting plate 12, so that when the crossflow wind wheel 20 rotates, it can suck air from the air inlet 2011 into the interior of the air guide channel 101, and discharge it from the air outlet 2012 after being pressurized by the crossflow wind wheel 20, thereby forming an outlet airflow. As an example, both ends of the crossflow impeller 20 can be connected to the first mounting plate 11 and the second mounting plate 12 through a rotating connection mechanism, so that the crossflow impeller 20 can rotate freely under the action of wind. By setting the rotating connection mechanism, the friction and wear of the crossflow impeller 20 during rotation can be reduced, and the operating efficiency and service life of the heater 200 can be improved. It can be understood that the rotating connection mechanism can be a bearing, a rotating joint or other rotating joints, and this embodiment does not limit this.

[0040] In this embodiment, the air guide plate 13 is roughly in the shape of an elongated strip, and the air guide plate 13 can be a plane or a curved surface, and is used to guide the air to flow in a specific direction. As an example, the air guide plate 13 has a curved surface section, and the curved surface section is concave toward the cross-flow wind wheel 20. The curved surface section can evenly distribute the hot air in the surrounding environment, avoid local overheating, and provide a comfortable indoor environment. At the same time, the curved surface section can reduce the turbulence and eddy current in the airflow, thereby playing a role in noise reduction. As a specific example, in this embodiment, the air guide plate 13 is roughly an arc-shaped plate, which has a contour structure similar to a cylinder, so that it is arranged around the outer periphery of the cross-flow wind wheel 20, and the curved surface section of the air guide plate 13, the first mounting plate 11, and the second mounting plate 12 together constitute a volute structure. As another example, the air guide plate 13 can also be provided with one or more angle structures on the plate surface to guide the air to flow in a specific direction. The existence of the angle structure causes the airflow to turn when passing through the air guide plate 13, which helps to disperse the airflow to different areas or concentrate it in a specific direction. At the same time, the angle structure helps reduce turbulence in the airflow and plays a role in noise reduction. In addition, the angle structure is also used to collect and filter particulate matter in the air to reduce environmental pollution.

[0041] The air guide channel 101 is used to guide the flow of air to ensure that heat is evenly distributed and effectively transferred to the required area. Specifically, the air guide channel 101 has an air inlet side 111 and an air outlet side 112 relative to each other. The air inlet side 111 is arranged at the air inlet 2011, and the air outlet side 112 is arranged at the air outlet 2012. After the outside air enters the heater 200 through the air inlet 2011, it enters the air guide channel 101 from the air inlet side 111, and is heated in the air guide channel 101 to form hot air, and then flows to the air outlet 2012 through the air outlet side 112 to heat the surrounding environment. In order to further improve the efficiency of air flow, the heater 200 also includes an air duct volute 40. The air duct volute 40 is arranged on the air outlet side 112 and is spaced from the air guide plate 13 to form an air outlet channel 102, and the air outlet channel 102 is connected to the air guide channel 101 and is located on the air guide side 112. The air duct volute 40 is connected and fixed to the first mounting plate 11 and the second mounting plate 12 by means of screws, welding, etc. The air duct volute 40 has an inclined portion 41, which gradually expands along the direction of the air outlet, so that the air outlet side 112 is open and expands outward, so that the airflow velocity can be slowed down during the flow of the airflow from the air inlet side 111 to the air outlet side 112, and the noise generated during the flow of the airflow can be reduced. It also helps the airflow to diffuse to the surroundings during the flow, so that the airflow can flow through the outside world more evenly, thereby helping the heater 200 to achieve uniform heating of the airflow and improve the overall heating effect. In other embodiments, the air duct volute 40 can also be provided with a plurality of air guide blades (not shown in the figure) to further improve the performance of the heater 200 and reduce noise.

[0042] See also Figure 2 and Figure 3In this embodiment, the crossflow wind wheel 20 is arranged in the air guide channel 101, and the crossflow wind wheel 20 is rotatably connected to the air duct housing 10. The crossflow wind wheel 20 is used to drive the air flow and blow the hot air flow evenly to the target area. Specifically, the crossflow wind wheel 20 is in the shape of an elongated cylinder, and the ratio of its length to diameter is large, so that a larger air flow coverage area can be generated in a smaller space, which is helpful to achieve continuous flow and circulation of air. Since the center of the crossflow wind wheel 20 has a receiving space 21, and the receiving space 21 is used to install the heating module 30, the crossflow wind wheel 20 requires good structural strength and heat resistance. The material of the crossflow wind wheel 20 can include any one or more of the following: aluminum alloy material, metal material, engineering plastic, etc., which is not limited in this embodiment. As an example, the crossflow wind wheel 20 is made of metal material, so that the crossflow wind wheel 20 has good thermal conductivity, so that when the heating module 30 is working, it can quickly heat up to become a secondary heat source, thereby improving the working efficiency of the heater 200. At the same time, the metal material is resistant to high temperatures and has a light weight, which can reduce the overall weight of the heater 200 and ensure the stability of the crossflow impeller 20 structure.

[0043] See also Figure 4 In this embodiment, the crossflow impeller 20 includes an impeller plate 22 and a plurality of blades 23. The plurality of blades 23 are arranged in sequence along the circumference of the impeller plate 22 and form a receiving space 21. The heating module 30 is disposed in the receiving space 21. A flow channel 24 is formed between adjacent blades 23. The flow channel 24 is used to allow a cold air flow to enter the receiving space, heat it, form a hot air flow, and then flow out. In order to improve the heating efficiency of the heater 200, the spacing between the heating module 30 and the crossflow impeller 20 can be small, so that the crossflow impeller 20 can quickly form a secondary heat source and improve space utilization, thereby effectively reducing the overall size of the heater 200 and facilitating the small size of the heater 200.

[0044] In this embodiment, the heating module 30 is arranged in the accommodation space 21 formed by the cross-flow wind wheel 20. The heating module 30 is used to generate heat when powered on to heat the cold air flow to form a hot air flow and transport the hot air flow to the outside through the air duct assembly 100. By arranging the heating module 30 inside the accommodation space 21, on the one hand, the spatial volume of the air guide channel 101 can be saved and the space utilization rate can be improved, thereby effectively reducing the overall volume of the heater 200, which is conducive to realizing the small volume of the heater 200. On the other hand, the heat transfer efficiency can be improved. The heat emitted by the heating module 30 can be transferred to any position of the cross-flow wind wheel 20 by means of thermal radiation and thermal convection, so that the air is heated when entering the cross-flow wind wheel 20 and blowing out of the cross-flow wind wheel 20, thereby improving the working efficiency. In addition, the heating module 30 is arranged in the accommodation space 21 at the center of the cross-flow wind wheel 20, which can also reduce wind resistance.

[0045] See also Figure 5 Specifically, the heating module 30 includes a heating element 31, which is a heating component of the heating module 30. The heating element 31 is extended along the axial direction of the crossflow wind wheel 20, so as to form a larger heating area, which helps to improve the heating efficiency of the heater 200. The heating element 31 may include a heating sheet 32, and the heating sheet 32 ​​has a length direction. The length direction of multiple heating sheets 32 is extended along a specified direction. The specified direction can be understood as a direction parallel to the axial direction of the crossflow wind wheel 20. The heating sheet 32 ​​can be a ceramic heating sheet 32, a metal heating sheet 32, a PTC heating sheet 32, etc., and this embodiment does not limit this. As an example, the heating sheet 32 ​​is a PTC heating sheet 32, which has the characteristics of low thermal resistance and high heat exchange efficiency, can generate heat quickly in a short time, and can improve the working efficiency of the heater 200.

[0046] See also Figure 5 and Figure 6 In this embodiment, the number of the heating fins 32 is multiple, and an air-guiding gap 33 is formed between adjacent heating fins 32. The air-guiding gap 33 facilitates hot air to flow through the heating fins 32 more smoothly, reduces the stagnation and accumulation of hot air between the heating fins 32, thereby improving the efficiency of heat transfer and enabling the hot air to be transported to the external environment more quickly. In addition, the air-guiding gap 33 can also reduce the loss of hot air between the heating fins 32. Through the reasonable layout of the gap, the hot air can flow more directly to the air outlet 2012, reducing the loss of heat. Specifically, the heating fin 32 has a first surface 321 and a second surface 322 that are opposite to each other. The first surface 321 convexly extends toward the air inlet side 111 to form a convex curved surface, and the second surface 322 is concavely recessed toward the air outlet side 112 to form a concave curved surface. By providing a curved heating fin 32, the hot air flow can flow more evenly to the external environment, thereby improving the working efficiency of the heater 200. The curved heating sheet 32 ​​also helps to guide the air flow, form an orderly air flow path, and improve the overall air circulation efficiency.

[0047] It should be noted that in some embodiments, the heating element 31 may also be in other forms, such as a heating tube, a heating wire, a heating rod, or other components that can generate and dissipate heat when powered on, and the number of heating elements 31 may be multiple or one, which is not limited in this embodiment. It is understandable that the more heating elements 31 there are, the higher the heating efficiency.

[0048] See also Figure 5 as well as Figures 7 to 8In this embodiment, the heating module 30 further includes a first connecting component 34 and a second connecting component 35, and the heating element 31 is connected between the first connecting component 34 and the second connecting component 35. The first connecting component 34 is installed on the first mounting plate 11, and the second connecting component 35 is arranged between the first connecting component 34 and the second mounting plate 12, and is spaced from the first connecting component 34. The first connecting component 34 is used to electrically connect the heating module 30 and the external circuit to ensure the normal operation of the heating module 30.

[0049] In this embodiment, the first connecting component 34 includes a first connecting shaft 341, and the first connecting shaft 341 is used to electrically connect with an external circuit (such as the main board 203). The wind wheel plate 22 includes a first wind wheel plate 221, the first wind wheel plate 221 is adjacent to the first mounting plate 11, and the first connecting shaft 341 is rotatably penetrated in the first wind wheel plate 221. Specifically, the first wind wheel plate 221 is provided with a first through hole 2211 extending along the axial direction of the crossflow wind wheel 20, and the first connecting shaft 341 penetrates the first through hole 2211. The first through hole 2211 is used to accommodate and install the first connecting component 34, and the shape and aperture of the first through hole 2211 are suitable for matching with the heating module 30. The first connecting component 34 also includes a first insulating sleeve 342, and the first insulating sleeve 342 is sleeved outside the first connecting shaft 341. The first insulating sleeve 342 is used to prevent short circuit and leakage, and protect the safety of users and equipment. At the same time, it is also used to isolate the high temperature generated by the heating module 30 and protect the first connecting shaft 341 from heat damage. The material of the first insulating sleeve 342 can be ceramic, mica, high-temperature silicone rubber, polyimide (PI), etc. The above materials can maintain stable insulation performance under high temperature environment. This embodiment does not limit the specific material of the first insulating sleeve 342. The first connecting component 34 also includes a first bearing 343, which is sleeved outside the first insulating sleeve 342. The first bearing 343 is used to provide support for the first connecting shaft 341 and maintain the stability of the first connecting shaft 341. In addition, the air duct component 100 also includes a first connecting ring 344, which is arranged in the first through hole 2211. Specifically, the first connecting ring 344 is sleeved outside the first connecting component 34, and is arranged in the first through hole 2211 with the first connecting component 34. The first connecting ring 344 is used to assemble with the first bearing 343 to jointly support the first connecting shaft 341 and allow it to rotate, thereby further improving the stability of the first connecting shaft 341 during rotation.

[0050] It should be noted that, in some embodiments, the first bearing 343 can be sleeved outside the first connecting shaft 341, and the first insulating sleeve 342 can be sleeved outside the first bearing 343. The first connecting ring 344 can be a coupling with a certain elasticity, which helps to absorb and buffer the vibration and impact generated during the rotation of the first connecting shaft 341, thereby improving the service life of the heater 200. The first connecting ring 344 can also be configured as a coupling with insulation impedance, which can further improve the safety of users and equipment. At the same time, under the effect of the insulation impedance of the first connecting ring 344, the insulation requirements can be met without the need to set the first insulating sleeve 342, thereby reducing the production cost of the heater 200.

[0051] See also Figures 5 to 7 as well as Fig. 9 In this embodiment, the second connecting assembly 35 includes a second connecting shaft 351, and the second connecting shaft 351 is used to fix the heating module 30 and the crossflow wind wheel 20. In this embodiment, the crossflow wind wheel 20 includes a partition plate 223, and the wind wheel plate 22 includes a second wind wheel plate 222. The first wind wheel plate 221, the second wind wheel plate 222 and the blades 23 define the outer contour of the crossflow wind wheel 20. The first wind wheel plate 221 and the second wind wheel plate 222 are arranged at intervals from each other, and the partition plate 223 is arranged between the first wind wheel plate 221 and the second wind wheel plate 222. A plurality of blades 23 are arranged in sequence along the circumference of the second wind wheel plate 222 and the first wind wheel plate 221, and the partition plate 223 is connected to the blades 23. The second connecting shaft 351 is rotatably provided through the partition plate 223. Specifically, the partition plate 223 is provided with a second through hole 2231 extending along the axis direction of the crossflow wind wheel 20, and the second through hole 2231 is coaxially arranged with the first through hole 2211. The second connecting shaft 351 is passed through the second through hole 2231, so that the heating element 31 is completely arranged in the accommodation space of the crossflow wind wheel 20, and the aperture and shape of the second through hole 2231 are suitable for matching with the heating module 30.

[0052] The second connecting component 35 also includes a second insulating sleeve 352, which is sleeved outside the second connecting shaft 351. The second insulating sleeve 352 is used to prevent short circuits and leakage, and protect the safety of users and equipment. It is also used to isolate the high temperature generated by the heating module 30 and protect the second connecting shaft 351 from thermal damage. The material of the second insulating sleeve 352 can be ceramic, mica, high-temperature silicone rubber, polyimide (PI), etc. The above materials can maintain stable insulation performance under high temperature environment. This embodiment does not limit the specific material of the second insulating sleeve 352. The second connecting component 35 also includes a second bearing 353, which is sleeved outside the second insulating sleeve 352. The second bearing 353 is used to provide support for the second connecting shaft 351 and maintain the stability of the second connecting shaft 351. In addition, the air duct assembly 100 also includes a second connecting ring 354, which is arranged in the second through hole 2231. Specifically, the second connection ring 354 is sleeved outside the second connection component 35, and is disposed in the second through hole 2231 together with the second connection component 35. The second connection ring 354 is used to assemble with the second bearing 353 to jointly support the second connection shaft 351, thereby further improving the stability of the heating module 30 during operation.

[0053] It should be noted that, in some embodiments, the second bearing 353 can be sleeved outside the second rotating shaft, and the second insulating sleeve 352 can be sleeved outside the second bearing 353. The second connecting ring 354 can be a coupling with a certain elasticity, which helps to absorb and buffer the vibration and impact generated during the rotation of the second rotating shaft, thereby improving the service life of the heater 200. The second connecting ring 354 can also be configured as a coupling with insulation impedance, which can further improve the safety of users and equipment. At the same time, under the effect of the insulation impedance of the second connecting ring 354, the insulation requirements can be met without the need to set the second insulating sleeve 352, thereby reducing the production cost of the heater 200.

[0054] See also Figure 3 and Figure 7In this embodiment, the air duct assembly 100 further includes a driving assembly 50, which is disposed on the side of the second mounting plate 12 away from the air guide channel 101. The driving assembly 50 is connected to the rotating shaft of the crossflow fan wheel 20 and is used to increase the power of the crossflow fan wheel 20 so that the crossflow fan wheel 20 rotates relative to the heating module 30. Specifically, the crossflow fan wheel 20 rotates under the drive of the driving motor so that a negative pressure is formed around the crossflow fan wheel 20, thereby guiding the external air into the air guide channel 101 through the air inlet side 111 and being sucked into the crossflow fan wheel 20 to form an inlet wind. The air sucked into the crossflow fan wheel 20 performs heat exchange with the heating element 31 and the heated crossflow fan wheel 20, thereby increasing the temperature of the outlet air flow. After being pressurized by the crossflow fan wheel 20 and heated by the heating element 31, the air forms hot air and is discharged from the air outlet 2012 to the outside to improve the ambient temperature. More specifically, the driving assembly 50 may be a driving member, and the driving member may be a component or part that generates power, such as a motor, a motor, an air pump, etc. The driving member may be fixed to the second mounting plate 12 by means of screws, welding, etc. As an example, the output shaft of the driving motor passes through the first mounting plate 11 and is connected to the second wind wheel plate 222. By adjusting the output power of the driving motor, the rotation speed of the crossflow wind wheel 20 is controlled, and the size of the output air volume and wind pressure of the heater 200 is adjusted.

[0055] In other embodiments, the drive assembly 50 may further include a transmission member (not shown in the figure). The transmission member is connected between the drive assembly 50 and the second wind wheel plate 222. The transmission assembly may be partially disposed inside the air guide channel 101, thereby improving the space utilization of the air duct assembly 100, and can effectively reduce the overall size of the heater 200, which is conducive to realizing the small size of the heater 200. The transmission member may be a gear transmission member. As an example, a plurality of gears are meshed with each other, one of which is connected to the output shaft of the drive member, and another gear is connected to the second wind wheel plate 222. The rotation speed of the crossflow fan can be controlled by adjusting the output power of the drive member or adjusting the number of gears or the number of gear teeth. This embodiment is not limited to this, and the transmission member may also be a chain drive, a belt drive or other transmission structure.

[0056] In summary, the embodiment of the present application provides a duct assembly 100, which includes a duct housing 10, a crossflow impeller 20 and a heating module 30, and the duct housing 10 has an air guide channel 101. Among them, the crossflow impeller 20 is arranged in the air guide channel 101, and the heating module 30 is arranged in the accommodation space at the center of the crossflow impeller 20. On the one hand, the spatial volume of the air guide channel 101 can be saved and the space utilization rate can be improved, thereby effectively reducing the overall size of the heater 200, which is conducive to realizing the small size of the heater 200. On the other hand, the heat transfer efficiency can be improved, and the heat emitted by the heating module 30 can be transferred to any position of the crossflow impeller 20 by means of heat radiation and heat convection, so that the air is heated when entering the crossflow impeller 20 and blowing out of the crossflow impeller 20, thereby improving the working efficiency. In addition, the accommodation space in the center of the crossflow impeller 20 where the heating module 30 is arranged can also reduce the wind resistance, thereby reducing the air volume loss and improving the air outlet efficiency of the duct assembly 100.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application 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 cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An air duct assembly, which is applied to a heater, characterized in that: include: An air duct housing, wherein the air duct housing has an air guiding channel; A crossflow wind wheel, the crossflow wind wheel is arranged in the wind guide channel, and the center of the crossflow wind wheel has a receiving space; as well as A heating module, which is disposed in the accommodation space and fixedly connected to the air duct housing; The heating module is used to generate heat when powered on.

2. The air duct assembly according to claim 1, characterized in that: The air duct housing includes an air guide plate, a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate are arranged relatively spaced apart, the air guide plate is connected between the first mounting plate and the second mounting plate, the air guide plate, the first mounting plate and the second mounting plate jointly define the air guide channel, and the two ends of the crossflow wind wheel are respectively rotatably connected to the first mounting plate and the second mounting plate.

3. The air duct assembly according to claim 2, characterized in that: The air guide channel has an air inlet side and an air outlet side opposite to each other. The air duct assembly includes an air duct volute tongue, which is arranged on the air outlet side and spaced apart from the air guide plate to form an air outlet channel.

4. The air duct assembly according to claim 2, characterized in that: The heating module includes a heating element, a first connecting component and a second connecting component. The first connecting component is installed on the first mounting plate, the second connecting component is arranged between the first connecting component and the second mounting plate and is spaced apart from the first connecting component, and the heating element is connected between the first connecting component and the second connecting component.

5. The air duct assembly according to claim 4, characterized in that: The heating element includes a plurality of heating sheets, each of which has a length direction, and the length directions of the plurality of heating sheets are all extended along a specified direction, the specified direction is parallel to the axial direction of the crossflow wind wheel, and adjacent heating sheets are spaced apart to form an air guide gap.

6. The air duct assembly according to claim 5, characterized in that: The heating plate has a first surface and a second surface that are opposite to each other, the air guide channel has an air inlet side and an air outlet side that are opposite to each other, the first surface faces the air inlet side, the second surface faces the air outlet side, the first surface is a convex surface, and the second surface is a concave surface.

7. The air duct assembly according to claim 4, characterized in that: The first connecting component includes a first connecting shaft electrically connected to the heating element, and the first connecting shaft is used to electrically connect to the main board of the heater to supply power to the heating element; the crossflow impeller includes a first impeller plate and a plurality of blades, one end of the impeller plate is connected to the first impeller plate, and the plurality of blades are arranged in sequence along the circumference of the first impeller plate to form the accommodating space, the first connecting shaft can rotatably pass through the first impeller plate, and the heating element is arranged in the accommodating space.

8. The air duct assembly according to claim 7, characterized in that: The first wind wheel plate is provided with a first through hole extending along the axial direction of the crossflow wind wheel. The first connecting assembly also includes a first bearing and a first insulating sleeve. The first insulating sleeve is sleeved outside the first connecting shaft. The first bearing is sleeved outside the first insulating sleeve and is arranged in the first through hole.

9. The air duct assembly according to claim 7, characterized in that: The second connecting assembly includes a second connecting shaft, and the crossflow wind wheel also includes a partition plate and a second wind wheel plate, the second wind wheel plate and the first wind wheel plate are spaced apart, the other end of the fan blade is connected to the second wind wheel plate, the partition plate is located between the first wind wheel plate and the second wind wheel plate, and the second connecting shaft is rotatably disposed on the partition plate.

10. The air duct assembly according to claim 9, characterized in that: The partition plate is connected to the fan blade, and the partition plate is provided with a second through hole extending along the axial direction of the crossflow wind wheel. The second connecting assembly also includes a second bearing and a second insulating sleeve, the second insulating sleeve is sleeved outside the second connecting shaft, and the second bearing is sleeved outside the second insulating sleeve and is arranged in the second through hole.

11. The air duct assembly according to any one of claims 2 to 10, characterized in that: The air duct assembly also includes a driving assembly, which is arranged on a side of the second mounting plate away from the air guide channel, and is connected to a rotating shaft of the crossflow wind wheel, and is used to drive the crossflow wind wheel to rotate.

12. A fan heater, comprising: shell; A mainboard, disposed in the housing; as well as The air duct assembly as described in any one of claims 1 to 11, wherein the air duct assembly is arranged inside the housing, and the heating module is electrically connected to the mainboard; the housing is provided with an air inlet and an air outlet, and the air inlet, the air guide channel, and the air outlet are connected in sequence.

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