Chimney duct heater

Abstract

This application discloses a chimney-type duct heater, comprising a body, a heating duct assembly, and an airflow generating device. The body has an air inlet at its bottom and an air outlet at least on one of the front and two sides of its upper side. The heating duct assembly is vertically arranged within the body and includes: a duct wall forming the vertical duct, a heating element disposed within the vertical duct, the vertical duct connecting the air inlet and outlet, and an airflow generating device for generating airflow from the air inlet to the outlet. This application employs a vertical duct, utilizing bottom air inlet and top air outlet, which conforms to the laws of thermal convection and improves heating efficiency. Because the heating element is arranged within the vertical duct, it can quickly exchange heat with the airflow. The duct and heating device have a simple structure. Furthermore, the air outlet is located on the upper side, which facilitates the diffusion of hot air and prevents direct airflow onto the body, resulting in a better user experience.

Description

[0001] Cross-referencing related documents

[0002] This application claims priority to application number 2025109098446, filed on July 2, 2025, entitled "Heating Duct Assembly, Humidifying Assembly, Heater and Chimney-type Duct Heater", the contents of which are considered part of the disclosure of this application and are hereby incorporated herein by reference in their entirety. Technical Field

[0003] This application relates to the field of heater technology, specifically to a chimney-type duct heater. Background Technology

[0004] With technological advancements, electric heaters are evolving towards higher efficiency, more uniform heating, and optimized structure. Existing heaters generally employ a horizontal air duct design, using bottom air intake and side air outlets to achieve heat exchange through circulation. This approach utilizes a multi-stage air duct structure to achieve heat exchange and change the direction of airflow, resulting in a complex air duct and heating device structure. Furthermore, the air vents are mostly concentrated on the sides of the unit and extend to near or below the middle, causing the generated hot air to blow directly onto the user, resulting in a poor user experience. Summary of the Invention

[0005] One objective of this application is to address the problems of complex structures and poor user experience in existing air ducts and heating devices.

[0006] This application provides a chimney-type duct heater, including a body, a heating duct assembly, and an airflow generating device; the bottom of the body is provided with an air inlet, and at least one of the upper side and two sides is provided with an air outlet; the heating duct assembly is vertically arranged in the body and includes: a duct wall that forms a vertical duct, a heating element disposed inside the vertical duct, the vertical duct connecting the air inlet and the air outlet, and an airflow generating device for generating airflow along the air inlet to the air outlet.

[0007] This application simplifies the duct structure and reduces the complexity of multi-stage ducts through improvements to the vertical duct and airflow generating device. The layout of the vertical duct connecting the air inlet and outlet allows the airflow to flow vertically, which conforms to the laws of thermal convection, improves heating efficiency, avoids hot airflow blowing directly on the human body, and enhances human comfort. At the same time, the structural optimization of the vertical duct reduces redundant design of the heating device, lowers manufacturing costs, and improves heat exchange efficiency.

[0008] As an improvement, the heating element comprises multiple sets of heating sub-elements arranged vertically and horizontally, each of which is a disc-shaped structure formed by winding heating element tubes. By adopting this scheme, the heating element is divided into multiple heating sub-elements, ensuring that the heating element achieves the required total power while controlling the length of each heating sub-element, ensuring that each heating sub-element is not too long and thus does not affect the stability of the installation and structure.

[0009] As an improvement, in order to effectively fix each heating element, a first auxiliary fixing member for fixing each heating element is also included.

[0010] As an improvement, a second auxiliary fastener is also included, which has a slot corresponding to the heating element. The side of the heating element opposite the connecting piece is inserted into the corresponding slot, while the second auxiliary fastener is fixedly installed to the air duct wall, which can effectively fix the other side of the heating element.

[0011] As an improvement, the heating element is a heating tube constructed in a spiral tower shape, with the axis of the heating element extending in the same direction as the vertical air duct. This effectively increases the heating surface area and improves the heat release efficiency. The spiral tower structure can distribute the hot airflow more evenly, reducing the occurrence of local overheating or cold zones, thereby improving the overall heating uniformity. Simultaneously, the spiral structure effectively prolongs the contact time between the airflow and the heating element within the air duct, enhancing the heat exchange effect. The fact that the axis of the heating element extends in the same direction as the vertical air duct allows heat energy to be concentrated and transferred along the air duct direction, ensuring that the hot airflow rises evenly in the vertical direction and avoiding excessively high local temperatures.

[0012] As an improvement, the diameter of the spiral coil of the heating element decreases from bottom to top. By making the diameter of the spiral coil of the heating element decrease from bottom to top, the flow path of hot air in the vertical air duct can be effectively extended, thereby enhancing the heat exchange efficiency.

[0013] As an improvement, the duct wall is made of metal, which ensures the stability of the structure in high-temperature environments and prevents a decrease in duct barrier performance due to heat deformation or damage. The metal material has excellent high-temperature resistance and mechanical strength, effectively withstanding the thermal stress generated by the continuous high-temperature operation of the heating elements, thereby extending the service life of the duct components.

[0014] As an improvement, the unit features a centrally lower and surroundingly higher airflow guide structure above the vertical air duct, with the air outlet located below this structure. This centrally lower and surroundingly higher airflow guide structure above the vertical air duct creates a diffused airflow distribution at the air outlet; this design prevents hot air from being directly and concentratedly ejected from the outlet, reducing the direct blowing sensation and improving user comfort; the optimized airflow path of the guide structure enhances heat circulation.

[0015] As an improvement, a humidifying evaporation chamber is provided on the top of the unit. At least a portion of the air guide structure is constructed as at least a portion of the bottom wall of the humidifying evaporation chamber, so that the hot airflow heats and evaporates the water in the humidifying evaporation chamber as it passes through the air guide structure. By constructing at least a portion of the air guide structure as the bottom wall of the humidifying evaporation chamber, the hot airflow heats and evaporates the water in the humidifying evaporation chamber as it passes through the air guide structure. This design integrates heating and humidification functions, improving the versatility of the equipment; at the same time, it improves the utilization efficiency of the hot airflow, reducing energy waste.

[0016] As an improvement, a humidification component is mounted on the upper part of the unit, and the humidification component internally contains the humidification evaporation chamber. The humidification evaporation chamber internally ensures the stability of the humidification function, while avoiding problems such as water pollution or difficulty in replacement, thus enhancing the practicality of the equipment.

[0017] As an improvement, the upper surface of the humidifier assembly has a recessed water inlet in the center, with the bottom of the water inlet connected to the humidification evaporation chamber. The recessed design of the water inlet facilitates the user's water filling operation, while the structure connecting the bottom to the humidification evaporation chamber ensures that the water is evenly distributed and effectively heated and evaporated; this design simplifies the user's water filling process and improves the user experience.

[0018] As an improvement, the bottom wall of the humidification evaporation chamber is at least partially made of metal. This metal construction allows for rapid heat conduction, improving the efficiency of water heating and evaporation. The thermal conductivity of the metal material also makes the humidification function more efficient, while simultaneously enhancing the overall thermal efficiency of the equipment.

[0019] Another aspect of this application discloses a chimney-type duct heater, comprising a body, a heating duct assembly, and an airflow generating device. The body has an air inlet at the bottom and an air outlet at the top. The heating duct assembly is vertically arranged within the body and includes: a duct wall forming the vertical duct, a heating element disposed within the vertical duct, the duct wall being made of metal, the vertical duct connecting the air inlet and the air outlet, and an airflow generating device for generating airflow along the air inlet to the air outlet. The use of metal for the duct wall in this design ensures structural stability under high-temperature conditions, preventing a decrease in duct resistance due to heat deformation or damage. Metal possesses excellent high-temperature resistance and mechanical strength, effectively withstanding the thermal stress generated by the heating element during continuous high-temperature operation, thereby extending the service life of the duct assembly.

[0020] Another aspect of this application discloses a chimney-type duct heater, comprising a body, a heating duct assembly, and an airflow generating device. The body has an air inlet at the bottom and an air outlet at the top. The heating duct assembly is vertically arranged within the body and includes: a duct wall forming the vertical duct, a heating element disposed within the vertical duct, the duct wall being made of metal, the vertical duct connecting the air inlet and the air outlet, and an airflow generating device for generating airflow along the air inlet to the air outlet. The air outlet is an open design, and at least the upper end of the vertical duct is equipped with a first protective net. Adding an open air outlet design and a first protective net improves airflow diffusion and reduces the problem of excessively high local airflow velocity; the first protective net effectively prevents foreign objects from entering the duct, improving the safety and operational stability of the equipment. Attached Figure Description

[0021] Figure 1 This is a perspective view of the heater in this application. Figure 2 This is a front sectional view of one embodiment of the heater described in this application. Figure 3 This is a perspective sectional view of one embodiment of the heater described in this application. Figure 4 This is a perspective schematic diagram of one embodiment of the heating duct assembly of this application. Figure 5 This is a perspective sectional view of one embodiment of the heating air duct assembly of this application. Figure 6 This is a perspective cross-sectional view of another embodiment of the heating duct assembly of this application. Figure 7 This is an exploded view of one embodiment of the heated air duct assembly of this application. Figure 8 This is a three-dimensional schematic diagram of one embodiment of the heating element of this application. Figure 9 This is a three-dimensional schematic diagram of the airflow generating device of this application. Figure 10 This is an exploded view of the humidification component and body of the heater in this application. Figure 11 This is an exploded view of the humidifier components. Figure 12 This is an exploded view of the humidifier component from another angle. Figure 13 This is a perspective view of another embodiment of the heating duct assembly of this application. Figure 14 This is a partial perspective three-dimensional schematic diagram of another embodiment of the heating air duct assembly of this application. Figure 15 This is an exploded view of another embodiment of the heated air duct assembly of this application. Figure 16 This is a perspective view of another embodiment of the heating duct assembly of this application, configured with an end plate. Figure 17 This is an exploded view of another embodiment of the heated air duct assembly of this application, configured with an end plate. Figure 18 This is a three-dimensional schematic diagram of another heating element of this application. Figure 19 This is a top view of another heating element in this application. Figure 20 This is a perspective view of another heating element of this application configured with auxiliary fixing members. Figure 21 This is an exploded perspective view of another embodiment of the heater described in this application. Figure 22 This is a perspective view of other embodiments of the heater described in this application. Specific Implementation

[0022] See Figures 1 to 9 A chimney-type duct heater includes a body 1, a heating duct assembly 2, and an airflow generating device 3. The body 1 has an air inlet 101 at the bottom and an air outlet 102 at least on the front and both sides of the upper side. The heating duct assembly 2 is vertically arranged inside the body 1 and includes: a duct wall 2.1 that forms a vertical duct 200, a heating element 2.2 disposed inside the vertical duct 200, the vertical duct 200 connecting the air inlet 101 and the air outlet 102, and an airflow generating device 3 that generates airflow along the air inlet 101 to the air outlet 102.

[0023] Because the rear of unit 1 is usually close to the wall, in order to better utilize the hot airflow, as shown in the attached... Figure 1 In the embodiment shown, the air outlet 102 is disposed on the front and left and right sides of the upper part of the body 1, so that hot air can be discharged from the front and left and right sides to effectively and quickly heat the place.

[0024] See Figure 9The airflow generating device 3 may include a fan blade 3.1 and a motor 3.2. Specifically, the impeller 3.1 may be an axial flow fan blade, so that the fan blade 3.1 can be installed axially along the vertical air duct 200 and integrated into the interior or lower end of the vertical air duct 200, thereby making the product structure compact.

[0025] See Figure 6 , Figure 7 and Figure 9 In some embodiments, the airflow generating device 3 further includes a bracket 3.3, a motor 3.2 mounted on the bracket 3.3 (e.g., by screws), an impeller 3.1 mounted on the output shaft of the motor 3.2, and both ends of the bracket 3.3 mounted on the duct wall 2.1, such as by screws.

[0026] The air duct wall 2.1 has one or more first connection holes 2.11 at both ends of the support 3.3, and the support 3.3 has one or more second connection holes 3.310 at both ends. The first connection holes 2.11 and the second connection holes 3.310 are connected by screws (not shown) to fix the airflow generating device 3 to the inside of the air duct wall 2.1.

[0027] See Figure 7 and Figure 9 The bracket 3.3 can be made of sheet metal, such as edge bends 3.31 at both ends of the bracket 3.3, with the second connecting hole 3.310 constructed on the edge bends 3.31. For ease of assembly, the outer side of the edge bends 3.31 is configured to fit the inner wall of the duct wall 2.1. The edge bends 3.31 facilitate the construction of the second connecting hole 3.310 and the installation of the bracket 3.3 onto the duct wall 2.1. Furthermore, the edge bends 3.31 reinforce the bracket 3.3.

[0028] To further enhance the structural strength of the support 3.3, side bending portions 3.32 are constructed on both sides of the long side of the support 3.3.

[0029] Since the entire airflow generating device 3 is mounted on the duct wall 2.1, and the entire vertical duct 200 is relatively high, the impeller 3.1 is made of metal to cope with the influence of high temperature on the impeller 3.1.

[0030] In some embodiments, the air outlet 102 is provided with a diffuser surface 1021, which can further optimize the diffusion effect of airflow and make the hot airflow exchange with the surrounding space more evenly. This design reduces the concentrated jet of hot airflow, avoids the feeling of direct airflow to the human body, and improves the comfort of use. In order to facilitate the airflow to enter the air inlet 101, a guide surface 1011 can be constructed on the edge of the air inlet 101.

[0031] This application simplifies the duct structure and reduces the complexity of multi-stage ducts through improvements to the vertical duct 200 and the airflow generating device 3. The layout of the vertical duct 200 connecting the air inlet 101 and the air outlet 102 allows the airflow to flow vertically, which conforms to the law of thermal convection, improves heating efficiency, avoids hot airflow blowing directly on the human body, and enhances human comfort. At the same time, the structural optimization of the vertical duct 200 reduces the redundant design of the heating device, reduces manufacturing costs, and improves heat exchange efficiency.

[0032] See Figures 3 to 8 In some embodiments, the heating element 2.2 is a heating tube. Heating tubes have high heat conversion efficiency and uniform heating characteristics, which can improve the heating capacity of the heater. In addition, heating tubes are economical, have a simple structure, are easy to install and maintain, have good stability, and reduce the overall complexity of the equipment. Heating tubes are existing technology, typically using a metal tube as the outer shell (including stainless steel and copper tubes), with heating alloy wires (nickel-chromium or iron-chromium alloy) evenly distributed inside the tube. The gaps are filled with compacted magnesium oxide sand, which has good insulation and thermal conductivity. Both ends of the tube are sealed with silicone.

[0033] See Figure 2 and Figure 3 , Figures 5 to 8 In some embodiments, the heating element 2.2 is constructed in a spiral tower shape, which can effectively increase the heating surface area and improve the heat release efficiency; the spiral tower structure can distribute the hot airflow more evenly, reduce the occurrence of local overheating or cold areas, thereby improving the overall heating uniformity; at the same time, the spiral structure can effectively prolong the contact time between the airflow and the heating element 2.2 in the air duct, enhancing the heat exchange effect.

[0034] In some embodiments, the axial extension direction of the heating element 2.2 is the same as the extension direction of the vertical air duct 200, which allows heat energy to be concentrated and transferred along the air duct direction, ensuring that the hot airflow rises uniformly in the vertical direction and avoiding excessively high local temperatures.

[0035] In some embodiments, the diameter of the spiral coil of the heating element 2.2 decreases from bottom to top. By making the diameter of the spiral coil of the heating element 2.2 decrease from bottom to top, the flow path of the hot airflow within the vertical air duct 200 can be effectively extended, allowing it to make full contact with the heating element 2.2 and enhancing heat exchange efficiency.

[0036] See Figure 4As shown in Figure 6, in some embodiments, the duct wall 2.1 is made of metal, such as galvanized sheet or cold-rolled sheet. Alternatively, 304 steel can be used. This ensures the stability of the structure under high-temperature conditions and prevents a decrease in duct barrier performance due to heat deformation or damage. Metal materials possess excellent high-temperature resistance and mechanical strength, effectively withstanding the thermal stress generated by the continuous high-temperature operation of the heating element 2.2, thereby extending the service life of the duct assembly.

[0037] See Figures 2 to 9 The heating element 2.2 is a heating tube, and its two electrical terminals 2.21 are equipped with connecting pieces 2.22. The connecting pieces 2.22 have one or more third connecting holes 2.220. The air duct wall 2.1, located above the airflow generating device 3, has two through holes 2.21' for the electrical terminals 2.21 to pass through, and one or more fourth connecting holes 2.12 corresponding to the third connecting holes 2.220. The two electrical terminals 2.21 pass through the through holes 2.21' and exit the air duct wall 2.1. Connecting screws (not shown) are connected to the one or more fourth connecting holes 2.12 and the one or more corresponding third connecting holes 2.220, fixing the heating element 2.2 to the inside of the air duct wall 2.1 by the connecting pieces 2.22.

[0038] See Figures 5 to 7 In some embodiments, when the heating element 2.2 is in the shape of a spiral tower, a bent third auxiliary fixing member 2.23 is also provided. The third auxiliary fixing member 2.23 is installed in the heating element 2.2 relative to the connecting piece 2.22, and its two ends are bent and connected to the air duct wall 2.1, thereby fixing the heating element 2.2 on the side corresponding to the connecting piece 2.22.

[0039] Specifically, the third auxiliary fastener 2.23 has bending portions 2.231 at both ends, and the bending portions 2.231 have fifth connecting holes 2.230. The duct wall 2.1 has a sixth connecting hole 2.13 corresponding to the fifth connecting hole 2.230. A screw (not shown) passes through the sixth connecting hole 2.13 and the fifth connecting hole 2.230, thereby fixing the third auxiliary fastener 2.23 to the duct wall 2.1.

[0040] See Figure 2 and Figure 3 In some embodiments, the body 1 is constructed above the vertical air duct 200 with a guide structure 4 that is low in the middle and high around the edges, and the air outlet 102 is constructed on the lower side of the guide structure 4. The guide structure 4, which is low in the middle and high around the edges, is positioned above the vertical air duct 200 to create a diffused airflow distribution at the air outlet 102. This structural design avoids the direct, concentrated ejection of hot air from the air outlet 102, reducing the direct blowing sensation on the user and improving comfort. The layout of the guide structure 4 optimizes the airflow path and enhances the heat circulation effect.

[0041] See Figures 18 to 20 This illustration shows another embodiment of the heating element 2.2 of this application. The heating element 2.2 includes multiple sets of heating sub-elements 2.2a-2.2d arranged vertically at intervals. Each heating sub-element 2.2a-2.2d is a disc-shaped structure formed by winding heating element tubes. The heating sub-elements 2.2a-2.2d are connected in parallel to achieve superposition of heating power. Typically, the maximum power of the heating element 2.2 in this application is around 2kW-3.5kW. Of course, the specific power can be set according to needs, such as increasing the number of heating sub-elements or increasing the power of individual heating sub-elements. By adopting the above scheme, the heating element 2.2 is divided into multiple heating sub-elements 2.2a-2.2d, which ensures that the heating element 2.2 reaches the required total power while controlling the length of each heating sub-element 2.2a-2.2d, ensuring that the length of each heating sub-element 2.2a-2.2d does not affect the stability of the installation and structure.

[0042] like Figures 18 to 20 In the illustrated embodiment, the heating element is configured in 4 groups, specifically labeled 2.2a-2.2d.

[0043] See Figure 14 , Figure 15 and Figure 20 In the illustrated embodiment, a first auxiliary fixing member 2.24 is further included for fixing each heating element 2.2a-2.2d (i.e., heating element 2.2a, heating element 2.2b, heating element 2.2c, and heating element 2.2d). The first auxiliary fixing member 2.24 is V-shaped and has several first slots 2.240 for embedding the heating element tube. The two ends of the first auxiliary fixing member 2.24 are connected to the air duct wall 2.1, such as by screws. Using the above solution, each heating element 2.2a-2.2d can be effectively fixed.

[0044] In some embodiments, the first auxiliary fastener 2.24 is configured with a first slot 2.240 for mounting each coil of heating element, i.e., the number of the plurality of slots 2.240 corresponds to the number of coils of each heating element 2.2a-2.2d, such as... Figure 20 In the embodiment shown, each of the four first auxiliary fasteners 2.24 has four first slots 2.240 on the upper side of the V-shape, and each ring of the heating element 2.2a-2.2d is inserted into the first slot 2.240 of the corresponding first auxiliary fastener 2.244.

[0045] In some embodiments, for ease of installation, the first auxiliary fastener 2.24 has first bends 2.241 at both ends, and the first bends 2.241 have connecting holes. The first bends 2.241 are connected to the duct wall 2.1 by screws (not shown).

[0046] See Figure 14 , Figure 15 and Figure 20 In other embodiments, the heating elements 2.2a-2.2d can also be fixed by a second auxiliary fastener 2.25. Specifically, the second auxiliary fastener 2.25 has a second slot 2.2520 corresponding to the heating elements 2.2a-2.2d. The side of the heating elements 2.2a-2.2d opposite to the connecting piece 2.22 is inserted into the corresponding second slot 2.2520. The second auxiliary fastener 2.25 is fixedly installed to the air duct wall 2.1, so the heating elements 2.2a-2.2d can be effectively fixed.

[0047] See Figure 15 and Figure 20 The second auxiliary fastener 2.25 includes a mounting wall 2.251 and support walls 2.250 oppositely configured on both sides of the mounting wall 2.251. The two support walls 2.250 are respectively configured with the second slots 2.2520 for mounting the heating elements 2.2a-2.2d. The second auxiliary fastener 2.25 is connected to the air duct wall 2.1 through the mounting wall 2.251, such as by screws.

[0048] See Figure 14 and Figure 15 In the illustrated embodiment, the inner wall of the duct wall 2.1 is constructed with a first flat area 2.251' for mounting the mounting wall 2.251. The first flat area 2.251' is constructed with a plurality of sixth connecting holes 2.250'. The mounting wall 2.251 is correspondingly constructed with a plurality of seventh connecting holes 2.250. Screws (not shown) connect the sixth connecting holes 2.250' and the seventh connecting holes 2.250 to fix the second auxiliary fastener 2.25 to the duct wall 2.1.

[0049] Of course, such as Figure 20 As shown, the first auxiliary fastener 2.24 and the second auxiliary fastener 2.25 can be configured simultaneously to fix the heating elements 2.2a-2.2d.

[0050] See Figure 14 , Figure 15 and Figure 20In some practical examples, the second auxiliary fastener 2.25 is located on one side of the V-shaped opening of the first auxiliary fastener 2.24. The first auxiliary fastener 2.24 positions each heating element 2.2a-2.2d, and the second auxiliary fastener 2.25 positions each heating element 2.2a-2.2d as a whole, ensuring the reliability of the installation of the heating element 2.2.

[0051] The first auxiliary fastener 2.24 and the second auxiliary fastener 2.25 are made of metal materials, such as cold-rolled steel sheets, or other suitable metal or non-metal materials.

[0052] See Figures 13 to 15 as well as Figure 20 In some practical examples, the mounting method of the electrical terminals 2.21 of each heating element 2.2a-2.2d can be connected to the air duct wall 2.1 by a connecting piece 2.22. That is, its two electrical terminals 2.21 are equipped with connecting pieces 2.22, and the connecting pieces 2.22 are constructed with one or more third connecting holes 2.220. The air duct wall 2.1 is constructed with two through holes 2.21' for the electrical terminals 2.21 to pass through, and one or more fourth connecting holes 2.12 corresponding to the third connecting holes 2.220. The two electrical terminals 2.21 pass out of the air duct wall 2.1 through the through holes 2.21'. The connecting screw (not shown) is connected to the one or more fourth connecting holes 2.12 and the one or more corresponding third connecting holes 2.220, fixing the heating element 2.2 to the inside of the air duct wall 2.1 by the connecting piece 2.22.

[0053] See Figures 13 to 15 as well as Figure 20 As shown, for ease of installation, a second flat area 2.22' for mounting the connecting piece 2.22 is constructed on the inner wall of the air duct 2.1, and the through hole 2.21' and the fourth connecting hole 2.12 are constructed in the second flat area 2.22'.

[0054] See Figures 13 to 15 In embodiments where the heating element 2.2 includes multiple sets of heating sub-elements 2.2a-2.2d arranged vertically and horizontally, in order to facilitate installation on the heating element 2.2, in other embodiments of the heating duct assembly 2, the duct wall 2.1 adopts a split structure, that is, the duct wall 2.1 includes a first part 2.1a and a second part 2.1b that are joined to each other, and the first part 2.1a and the second part 2.1b are connected or welded to each other.

[0055] exist Figures 13 to 15In the illustrated embodiment, the first part 2.1a and the second part 2.1b are connected by screws (not shown). The connection part of the first part 2.1a and the second part 2.1b is respectively constructed with a first connecting flange 2.1a1 and a second connecting flange 2.1b1, which are connected by screws.

[0056] See Figure 13 In some embodiments, the lower end and upper end of the duct wall 2.1 are respectively provided with a lower mounting hole 2010 and an upper mounting hole 2020, and the heating duct assembly 2 is installed through the lower mounting hole 2010 and the upper mounting hole 2020. Specifically, the lower mounting hole 2010 and the upper mounting hole 2020 can be constructed on the flange structure at the lower end and the upper end of the duct wall 2.1.

[0057] See Figure 16 In some embodiments, the lower end and the upper end of the heating air duct assembly 2 are respectively provided with a first end plate member 1.5 and a second end plate member 1.6. The heating air duct assembly 2 is connected to the first end plate member 1.5 and the second end plate member 1.6 by screws through the lower mounting hole 2010 and the upper mounting hole 2020 (not shown).

[0058] Regarding another aspect of the improvement in this application, based on existing heaters, the heating of the surrounding air by hot airflow can lead to air dryness, thus affecting the user experience. In the prior art, some manufacturers improve air humidity and enhance the user experience by configuring humidification modules. However, existing humidification modules use ultrasonic atomization, which is costly, structurally complex, and has a short lifespan.

[0059] See Figures 1 to 3 In some embodiments, a humidifying evaporation chamber 500 is provided on the top of the main body 1. At least a portion of the air guide structure 4 is configured as at least a portion of the bottom wall 5.1 of the humidifying evaporation chamber 500, so that the hot airflow heats and evaporates the water in the humidifying evaporation chamber 500 when passing through the air guide structure 4. By configuring at least a portion of the air guide structure 4 as at least a portion of the bottom wall 5.1 of the humidifying evaporation chamber 500, the hot airflow heats and evaporates the water in the humidifying evaporation chamber 500 when passing through the air guide structure 4. This design integrates heating and humidification functions, improving the multifunctionality of the equipment; at the same time, the utilization efficiency of the hot airflow is improved, reducing energy waste.

[0060] exist Figures 1 to 3 In the illustrated embodiment, the lower surface of the bottom wall of the humidification evaporation chamber 500 is configured as the air guide structure 4.

[0061] See Figures 1 to 3 as well as Figure 10In some embodiments, a humidification assembly 5 is mounted on the upper part of the body 1, and the humidification assembly 5 internally contains the humidification evaporation chamber 500. The humidification evaporation chamber 500 internally contains the humidification assembly 5, ensuring the stability of the humidification function while avoiding problems such as water pollution or difficulty in replacement, thus enhancing the practicality of the equipment.

[0062] In some embodiments of improved humidification methods, the air inlet 101 and air outlet 102 are not limited to the aforementioned configuration. The air duct 200 of the heating air duct assembly 2 is equipped with a heating element 2.2. The air duct 200 connects the air inlet 101 and the air outlet 102, and an airflow generating device 3 generates airflow along the air inlet 101 to the air outlet 102. The air duct 200 is not limited to a vertical arrangement. The humidification assembly 5 includes a humidification evaporation chamber 500 and an evaporation discharge channel 502. At least part of the wall of the humidification evaporation chamber 500 is configured as an air guide structure 4 that guides the hot air generated by the heating air duct assembly 2 to the air outlet 102. In response to the heat transferred by the air guide structure 4, the water in the humidification evaporation chamber 500 is heated and evaporated.

[0063] In some embodiments, the humidifying component 5 is disposed on the top of the unit 1, and the air outlet 102 is disposed on the upper side of the unit 1. The placement of the humidifying component 5 on the top of the unit 1 and the air outlet 102 on the upper side of the unit 1 creates a better flow path for hot air between the air guide structure 4 and the air outlet 102, increasing the contact area between the hot air and the water in the humidifying evaporation chamber 500 and improving evaporation efficiency. Simultaneously, the top layout avoids interference with the main function of the heater by the humidifying component 5 and optimizes the spatial structure.

[0064] In the embodiment with the air guide structure 4, since the air guide structure 4 is a raised shape with a low center and high edges, and the outlet of the air duct 200 is located below the air guide structure 4, the hot air forms a flow that diffuses in all directions when passing through the air guide structure 4, which increases the contact time between the hot air and the water in the humidification evaporation chamber 500 and improves the evaporation efficiency.

[0065] In some improvements, the air guide structure 4 is curved and bulges downwards, allowing the hot air to form a smoother flow path as it passes through, reducing airflow resistance and improving the heat exchange efficiency between the hot air and the water. In addition, the curved structure can also disperse the concentrated area of ​​hot air, avoiding local overheating that leads to uneven water evaporation and extending the service life of the humidification component 5.

[0066] See Figures 1 to 3 In some embodiments, the upper surface of the humidifying component 5 has a recessed water filling section 50 in the middle, and the bottom of the water filling section 50 is connected to the humidifying evaporation chamber 500. The recessed design of the water filling section 50 facilitates the user's water filling operation, while its bottom connection to the humidifying evaporation chamber 500 ensures that the water can be evenly distributed and effectively heated and evaporated; this design simplifies the user's water filling process and improves the user experience.

[0067] See Figures 1 to 3 In some embodiments, the water filling section 50 is equipped with a water level indicator structure 501. The water level indicator structure 501 allows the user to intuitively understand the water level in the humidification component 5, avoiding humidification failure due to too low a water level or leakage due to too high a water level; this design improves the safety and ease of use of the equipment.

[0068] See Figure 3 In some embodiments, the water level indicating structure 501 includes a limiting plane constructed at the lower end of the water inlet 50. As part of the water level indicating structure 501, the limiting plane allows for intuitive judgment of the water level, enabling users to quickly confirm the water level status of the humidification evaporation chamber 500 and preventing humidification failure due to excessively low water levels or leakage due to excessively high water levels. The limiting plane may be equipped with indicator markings such as "Maximum Water Level," "Max," or other easily identifiable markings for users.

[0069] Specifically, such as 2 and Figure 3 As shown, the bottom of the water filling section 50 has a recessed cavity 50', and the side wall of the recessed cavity 50' has a water filling channel 501' that connects to the humidification evaporation chamber 500. The bottom wall of the recessed cavity 50' is the water level indicator structure 501. When the user adds water to the water filling section 50, the water enters the humidification evaporation chamber 500 through the recessed cavity 50' and the water filling channel 501'. When the water level in the humidification evaporation chamber 500 reaches the water level indicator structure 501, the user stops adding water.

[0070] In some embodiments, the bottom wall 5.1 of the humidifying evaporation chamber 500 is at least partially made of a metallic material. The fact that the bottom wall 5.1 of the humidifying evaporation chamber 500 is at least partially made of a metallic material enables rapid heat conduction, improving the heating and evaporation efficiency of the water; the thermal conductivity of the metallic material makes the humidification function more efficient, while also enhancing the overall thermal efficiency of the equipment.

[0071] See Figure 2 , Figure 3 as well as Figure 11 and Figure 12 The bottom wall of the 500mm humidification chamber is integrally formed from a sheet metal part, such as through stamping or stretching, and can specifically be made of 304 stainless steel. This process not only ensures structural strength and thermal conductivity but also simplifies the manufacturing process and reduces production costs. The integrally formed structure reduces the assembly steps of traditional split-type humidification components, improves overall sealing and reliability, and extends service life.

[0072] See Figures 1 to 3 as well as Figure 11 and Figure 12The evaporation discharge channel 502 is constructed on the side wall of the water inlet section 50. The evaporation discharge channel 502 is located on the side wall of the water inlet section 50 to allow evaporated water vapor or condensate to drain through the channel, preventing water accumulation or moisture retention in the humidification evaporation chamber 500 and thus preventing mold growth. This design also optimizes the drainage path of the humidification component 5, improving overall hygiene and safety.

[0073] See Figure 11 and Figure 12 In some embodiments, the humidification component 5 includes a housing 5.2 and a cover 5.3. The bottom wall of the housing is the bottom wall 5.1 of the humidification evaporation chamber 500, and the cover 5.3 is configured with the water inlet 50 and the evaporation discharge channel 502. The bottom wall of the housing 5.2 is configured as the bottom wall 5.1 of the humidification evaporation chamber 500, and the cover 5.3 integrates the water inlet 50 and the evaporation discharge channel 502. Through modular design, multiple functional components of the humidification component 5 are integrated into an independent unit, which facilitates installation and maintenance, while reducing the overall structural complexity and production costs.

[0074] See Figures 1 to 3 , Figures 10 to 12 In some embodiments, the humidifying component 5 includes a housing 5.2 and a cover 5.3. The bottom wall of the housing is constructed as the bottom wall 5.1 of the humidifying evaporation chamber 500, and the cover 5.3 constructs the water inlet 50 and the evaporation discharge channel 502. By designing the humidifying component 5 as a separate structure of housing 5.2 and cover 5.3, with the bottom wall of the housing directly constructed as the bottom wall 5.1 of the humidifying evaporation chamber 500, and the cover 5.3 integrating the water inlet 50 and the evaporation discharge channel 502, modular assembly is achieved.

[0075] See Figures 1 to 3 , Figures 10 to 12 In some embodiments, a first recessed area 5001 is formed along the lower side of the bottom wall 5.1, and a branch guiding area 4.1 of the air guiding structure 4 is formed on the outer wall of the first recessed area 5001. The combination of the recess and the protrusion further guides the hot air to form a multi-directional flow path within the humidification evaporation chamber 500. This structure can enhance the contact area between the hot air and the water, improving evaporation efficiency; at the same time, the protruding design of the branch guiding area 4.1 can reduce airflow resistance, prevent hot air from accumulating in local areas, and optimize the overall humidification uniformity.

[0076] See Figures 1 to 3 , Figures 10 to 12In some embodiments, the upper surface of the humidifying component 5 is recessed downwards corresponding to the first recessed area 5001 to form a water filling part 50, and the bottom of the water filling part 50 is connected to the humidifying evaporation chamber 500. The water filling part 50, formed by the recess on the upper surface of the humidifying component 5 corresponding to the first recessed area 5001 and connected to the humidifying evaporation chamber 500 at the bottom, facilitates the water filling operation. The recessed structure prevents water from overflowing during water filling, while the bottom connection design ensures that water quickly enters the evaporation chamber 500 after filling, reducing user operation steps and improving the user experience.

[0077] See Figures 1 to 3 , Figures 10 to 12 The water level indicator structure 501 is designed as a limiting plane to ensure the stability and accuracy of the water level indication. The limiting plane, in conjunction with the water filling unit 50, forms a clear water level boundary line, allowing users to quickly determine the water level status and reducing misjudgments caused by water level fluctuations, thereby improving equipment reliability and user experience.

[0078] See Figures 1 to 3 , Figures 10 to 12 In some embodiments, the bottom of the water filling section 50 is provided with a submerged cavity 50', the side wall of the submerged cavity 50' is provided with a water filling channel 501' communicating with the humidification evaporation chamber 500, and the bottom wall of the water filling submerged cavity 50' is provided with a water level indicator structure 501. By constructing a submerged cavity 50' and a corresponding water filling channel 501' at the bottom of the water filling section 50, and making the bottom wall of the submerged cavity a water level indicator structure 501, the functions of water filling and water level monitoring are integrated, and this structure makes it very convenient for users to observe the highest water level.

[0079] See Figures 1 to 3 , Figures 10 to 12 In some embodiments, the evaporation discharge channel 502 is disposed outside the submerged cavity 50' of the water filling section 50. Distributing the evaporation discharge channel 502 outside the submerged cavity 50' of the water filling section 50 can effectively separate the water filling and drainage functional areas, preventing water from overflowing from the discharge channel when the equipment is moved.

[0080] See Figures 1 to 3 , Figures 10 to 12 In some embodiments, the evaporation discharge channel 502 is arranged around the outside of the recessed cavity 50'. Arranging the evaporation discharge channel 502 around the outside of the recessed cavity 50' creates a uniform water vapor discharge path, enhances the flow capacity of the discharge channel, ensures rapid discharge of evaporated water vapor, reduces humidity accumulation inside the humidification component, and improves moisture diffusion.

[0081] In some embodiments, a guiding region 4.2, which is connected to the guiding region 4.1, is constructed on the lower side of the bottom wall 5.1, around the outer periphery of the first recessed area 5001. The guiding region 4.2, located on the lower side of the bottom wall 5.1 around the first recessed area 5001, further guides the hot air to form a diffusion flow path within the humidifying evaporation chamber 500. The guiding region 4.2, by increasing the airflow channel area, reduces the hot air flow resistance and optimizes the airflow distribution within the evaporation chamber.

[0082] In some embodiments, a water blocking area 503 is constructed between the outer periphery of the first recess 5001 and the evaporation discharge channel 502. By providing the evaporation discharge channel 502 on the outer periphery of the first recess 5001 and forming the water blocking area 503 between it and the first recess 5001, the water blocking area 503 can serve as a buffer area to prevent water from overflowing from the discharge channel when the device is moved.

[0083] The enclosure 5.2 can be made by stamping metal sheets. To prevent corrosion from water, 304 stainless steel sheets can be used. Alternatively, ordinary cold-rolled steel sheets can be used, with a rust-proof treatment applied to the surface. The lid 5.3 can be made by injection molding, a mature process that allows for a high degree of design freedom.

[0084] See Figure 11 and Figure 12 The box body 5.2 is also formed with a box body side wall 5.21, and the lower side of the cover 5.3 has a cover assembly part 5.31 that cooperates with the box body side wall 5.21. The cover 5.3 is assembled by inserting the cover assembly part 5.31 into the inner side of the box body side wall 5.21.

[0085] In some embodiments, a connecting structure is provided between the cover assembly 5.31 and the box side wall 5.21 for fixing the cover 5.3. One embodiment of the connecting structure includes one or more protrusions 5.211 formed on the box side wall 5.21, and one or more locking protrusions 5.311 formed on the cover assembly 5.31. When the cover assembly 5.31 is inserted into the inside of the box side wall 5.21, the locking protrusions 5.311 engage with the underside of the corresponding protrusions 5.211 to fix the cover 5.3 to the box 5.2. When it is necessary to open the cover, the cover 5.3 is pulled upward from inside the box 5.2 to disengage the locking protrusions 5.311 from the protrusions 5.211.

[0086] like Figures 10 to 12 As shown, the upper end of the side wall 5.2 of the housing is constructed with a housing flange 5.22 extending outward. The housing flange 5.22 is installed on the upper end of the body 1 and can be fixed by a connector such as a screw.

[0087] The cover 5.3 is located in the cover assembly part 5.31 and has a cover edge 5.32 that mates with the box body protrusion 5.22. When the cover 5.3 is assembled to the box body 5.2, the cover edge 5.32 is assembled on the upper side of the box body protrusion 5.22, and at the same time, the locking protrusion 5.311 is engaged with the lower side of the corresponding protrusion 5.211. The above structure facilitates the installation and positioning of the cover 5.3.

[0088] See Figures 1 to 3 Another aspect of this application discloses a chimney-type duct heater, comprising a body 1, a heating duct assembly 2, and an airflow generating device 3. The body 1 has an air inlet 101 at its bottom and an air outlet 102 at its top. The heating duct assembly 2 is vertically arranged within the body 1 and includes: a duct wall 2.1 forming a vertical duct 200, a heating element 2.2 disposed within the vertical duct 200, the duct wall 2.1 being made of metal, the vertical duct 200 connecting the air inlet 101 and the air outlet 102, and the airflow generating device 3 generating airflow along the air inlet 101 to the air outlet 102. The use of metal for the duct wall 2.1 in this design ensures structural stability under high-temperature conditions, preventing a decrease in duct resistance due to heat deformation or damage. Metal materials possess excellent high-temperature resistance and mechanical strength, effectively withstanding the thermal stress generated by the continuous high-temperature operation of the heating element 2.2, thereby extending the service life of the duct assembly.

[0089] See Figures 1 to 3 Another aspect of this application discloses a chimney-type duct heater, comprising a body 1, a heating duct assembly 2, and an airflow generating device 3; the body 1 has an air inlet 101 at the bottom and an air outlet 102 at the top; the heating duct assembly 2 is vertically arranged inside the body 1 and includes: a duct wall 2.1 forming a vertical duct 200, a heating element 2.2 disposed inside the vertical duct 200, the duct wall 2.1 being made of metal, the vertical duct 200 connecting the air inlet 101 and the air outlet 102, and an airflow generating device 3 generating airflow along the air inlet 101 to the air outlet 102; the air outlet 102 is an open design, and at least the upper end of the vertical duct 200 is provided with a first protective net 202'. The air outlet 102 is made into an open design and equipped with a first protective net 202'. The open design can improve the diffusion of airflow and reduce the problem of excessive local airflow speed. The first protective net 202' effectively prevents foreign objects from entering the air duct, thereby improving the safety and operational stability of the equipment.

[0090] See Figures 1 to 3In some embodiments, the air inlet 101 is located on the side of the bottom of the body 1. The air inlet 101 is an open design, and a second protective net 201' is configured at the lower end of the vertical air duct 200. The bottom side air inlet layout can effectively utilize the airflow on the ground and improve the air intake efficiency; the second protective net 201' prevents foreign objects from entering the air duct and ensures the safety and reliability of the equipment operation.

[0091] See Figure 21 On the other hand, this application addresses the problems of existing heaters having numerous body parts, complex installation, and high costs. This application improves the structure of the body 1: the body 1 includes a base plate 1.1, four uprights 1.2, an outer shell cover 1.3, and a rear cover 1.4; the lower ends of the four uprights 1.2 are connected to the base plate 1.1, and a space for installing the heating air duct assembly 2 is formed between the four uprights. The heating air duct assembly 2 is installed on the four uprights 1.2. The outer shell cover 1.3 covers the left, right, and front sides of the four uprights 1.2, and the rear cover 1.4 is installed on the rear side of the four uprights 1.2. The lower and upper sides of the outer shell cover 1.3 are respectively equipped with an air inlet 101 and an air outlet 102 communicating with the heating air duct assembly 2. A humidifying assembly 5 is installed on the upper part of the four uprights 1.2, and the housing 5.2 can be connected to the upper end of the outer shell cover 1.3.

[0092] The column 1.2 can be made of sheet metal components, such as components with a V-shaped cross section.

[0093] See Figure 1 and Figure 16 This application also includes a control component 6.1 and a power supply circuit (not shown). The control component 6.1 is electrically connected to the power supply circuit (not shown). The control component 6.1 is used to realize user switching. The control component 6.1 and the power supply circuit (not shown) can specifically adopt the prior art.

[0094] See Figures 6 to 8 as well as Figure 21 In some embodiments, the lower end and the upper end of the heating air duct assembly 2 are connected to the column 1.2 via the first end plate member 1.5 and the second end plate member 1.6, respectively. Specifically, the lower end and the upper end of the air duct wall 1.1 of the heating air duct assembly 2 are connected to the column 1.2 via the first end plate member 1.5 and the second end plate member 1.6, respectively, which can be achieved by screws.

[0095] See Figure 16 , Figure 17 and Figure 21The first end plate component 1.5 and the second end plate component 1.6 are respectively constructed with a first recess 1.51 and a second recess 1.61 adapted to the shape of the column 1.2. The first recess 1.51 and the second recess 1.61 are respectively constructed with a first bend 1.51' and a second bend 1.61'. The first bend 1.51' and the second bend 1.61' are respectively constructed with an eighth connecting hole 1.511 and a ninth connecting hole 1.611. The column 1.2 is constructed with a tenth connecting hole 1.20 corresponding to the eighth connecting hole 1.511 and the ninth connecting hole 1.611. The eighth connecting hole 1.511 and the ninth connecting hole 1.611 are connected to the corresponding tenth connecting hole 1.20 by screws (not shown), thereby installing the heating air duct assembly 2 on the four columns 1.2.

[0096] To increase structural stability, each column 1.2 is connected to the others via a central connector 1.7, which can be connected by screws.

[0097] See Figures 6 to 8 as well as Figure 21 In some embodiments, a second protective net 201' and a first protective net 202' are respectively constructed on the first end plate member 1.5 and the second end plate member 1.6.

[0098] The first end plate component 1.5 and the second end plate component 1.6 can be formed by sheet metal forming. The second protective net 201' and the first protective net 202' can be directly stamped and formed on the first end plate component 1.5 and the second end plate component 1.6. By adopting this integrated molding scheme, the air inlet 201 and the air outlet 202 of the air duct 200 are integrated with the second protective net 201' and the first protective net 202' respectively. The structure is simple, the installation is quick, the stability is good, and the economy is good.

[0099] Of course, in other embodiments, the second protective net 201' and the first protective net 202' can be laser-cut and formed on the first end plate member 1.5 and the second end plate member 1.6.

[0100] Of course, in other embodiments, through holes can be constructed in the first end plate member 1.5 and the second end plate member 1.6, and then the second protective net 201' and the first protective net 202' can be installed.

[0101] See Figure 16 and Figure 17 The second end plate component 1.6 constructs a channel 1.60, and the first end plate component 1.5 constructs a second protective net 201'.

[0102] In other embodiments, the number of columns 1.2 can be configured according to specific needs.

[0103] See Figure 22To improve safety, an air outlet protective net 102' is installed at the air outlet 102 to prevent burns caused by accidental insertion of a person into the air outlet 102.

[0104] See Figure 16 The outer shell cover 1.3 is formed from sheet metal and consists of a single piece of material including the front and left / right sides. Specifically, it can be made of cold-rolled sheet metal. The lower end of the outer shell cover 1.3 can be screwed to the base plate 1.1. The rear cover 1.4 is connected to the openings formed on the left and right sides of the outer shell cover 1.3. By using the aforementioned single-piece structure for the outer shell cover 1.3 and placing the cover on the less easily observed rear side, the product's outer shell is simplified, making the product more concise and aesthetically pleasing.

[0105] To facilitate the movement of the heater, wheels 9 can be installed at the lower end of the main body 1. The wheels 9 can be omnidirectional wheels to facilitate the user's movement of the heater. The wheels 9 can be installed at the four lower corners of the base plate 1.1.

[0106] The air outlet protective net 102' can be fixed by the outer shell cover 1.3 after being assembled on the four uprights 1.2. Of course, slots for positioning the air outlet protective net 102' can be constructed on the four uprights 1.2, and the air outlet protective net 102' is installed in the slots.

[0107] The air outlet protective net 102' is made of metal protective net.

[0108] The contents of the various embodiments of this application can be combined and referenced with each other, and all fall within the protection scope of this application.

[0109] Based on the disclosure and teachings of the above specification, those skilled in the art to which this application pertains can make changes and modifications to the above embodiments. This application is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this application should also fall within the protection scope of the claims of this application.

Claims

1. A chimney-type duct heater, characterized in that, include: The body (1) has an air inlet (101) at the bottom and an air outlet (102) at least one of the front and two sides on the upper side. A heating air duct assembly (2), vertically arranged within the body (1), includes: an air duct wall (2.1) forming a vertical air duct (200), and a heating element (2.2) disposed within the vertical air duct (200), wherein the vertical air duct (200) connects the air inlet (101) and the air outlet (102), and An airflow generating device (3) that generates airflow along the air inlet (101) to the air outlet (102).

2. The chimney-type duct heater according to claim 1, characterized in that, The heating element (2.2) includes multiple sets of heating sub-elements (2.2a-2.2d) arranged vertically and horizontally, each heating sub-element (2.2a-2.2d) being a disc-shaped structure made of a heating element tube.

3. The chimney-type duct heater according to claim 2, characterized in that, It also includes a first auxiliary fastener (2.24) for securing each heating element (2.2a-2.2d).

4. The chimney-type duct heater according to claim 2, characterized in that, It also includes a second auxiliary fastener (2.25), which has a slot corresponding to the heating element (2.2a-2.2d).

5. The chimney-type duct heater according to claim 1, characterized in that, The heating element (2.2) is a heating tube and is constructed in the shape of a spiral tower. The axial extension direction of the heating element (2.2) is the same as the extension direction of the vertical air duct (200).

6. The chimney-type duct heater according to claim 5, characterized in that, The diameter of the spiral coil of the heating element (2.2) decreases from bottom to top.

7. The chimney-type duct heater according to any one of claims 1 to 6, characterized in that, The duct wall (2.1) is made of metal.

8. The chimney-type duct heater according to any one of claims 1 to 6, characterized in that, The body (1) is located above the vertical air duct (200) and has a guide structure (4) that is low in the middle and high around the edges. The air outlet (102) is located on the lower side of the guide structure (4).

9. The chimney-type duct heater according to claim 8, characterized in that, The top of the body (1) is provided with a humidifying evaporation chamber (500), and at least a portion of the air guide structure (4) is constructed as at least a portion of the bottom wall (5.1) of the humidifying evaporation chamber (500), so that the hot airflow heats and evaporates the water in the humidifying evaporation chamber (500) when passing through the air guide structure (4).

10. The chimney-type duct heater according to claim 9, characterized in that, It includes a humidification assembly (5) mounted on the upper part of the body (1), and the humidification assembly (5) has the humidification evaporation chamber (500) inside.

11. The chimney-type duct heater according to claim 10, characterized in that, The upper surface of the humidification component (5) has a downwardly recessed water filling part (50) in the middle, and the bottom of the water filling part (50) is connected to the humidification evaporation chamber (500).

12. The chimney-type duct heater according to claim 9, characterized in that, The bottom wall (5.1) of the wet evaporation chamber (500) is at least partially made of metal.

13. A chimney-type duct heater, characterized in that, include: The body (1) has an air inlet (101) at the bottom and an air outlet (102) at the top. A heating air duct assembly (2), vertically arranged within the body (1), includes: an air duct wall (2.1) forming a vertical air duct (200), and a heating element (2.2) disposed within the vertical air duct (200). The air duct wall (2.1) is made of metal. The vertical air duct (200) connects the air inlet (101) and the air outlet (102). An airflow generating device (3) that generates airflow along the air inlet (101) to the air outlet (102).

14. A chimney-type duct heater, characterized in that, include: The body (1) has an air inlet (101) at the bottom and an air outlet (102) at the top. A heating air duct assembly (2), vertically arranged within the body (1), includes: an air duct wall (2.1) forming a vertical air duct (200), and a heating element (2.2) disposed within the vertical air duct (200). The air duct wall (2.1) is made of metal. The vertical air duct (200) connects the air inlet (101) and the air outlet (102). An airflow generating device (3) that generates airflow from the air inlet (101) to the air outlet (102); The air outlet (102) is an open design, and at least the upper end of the vertical air duct (200) is equipped with a first protective net (201').

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