Air duct conversion structure and bath heater

Abstract

The utility model provides an air duct conversion structure and a bath heater, and belongs to the technical field of electrical equipment, the air duct conversion structure comprises a volute and an air door, the volute is used for installing a fan assembly, the volute is provided with an airflow channel, an air supply channel and an exhaust port, and the airflow channel is used for installing the fan assembly; the air door is rotatably arranged in the airflow channel, the air door has a first state, and the air door seals the exhaust port to achieve air blowing; when the air door has a second state, the air door closes the air supply channel to realize air exchange; small-scale modification is carried out through rotation of the air door, only one set of fan assembly is needed, the whole machine blowing and ventilation functions are considered, and the production cost is reduced. According to the air duct conversion structure, the problem that in the prior art, the heating function and the ventilation function of a bath heater are designed in a separated mode, and consequently the production cost of products is increased is solved.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to a duct conversion structure and a bathroom heater. Background Technology

[0002] A bathroom heater is a small household appliance that combines multiple functions such as heating, infrared therapy, ventilation, and decoration in a bathroom through a clever combination of a specially designed fan and an exhaust fan.

[0003] In existing technologies, the heating and ventilation functions of bathroom heaters are usually designed to be completely separate. When both functions need to be combined, at least two impellers and motors, as well as corresponding volute structures, are required, which increases the production cost of the product. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem of increased product production cost caused by the separate design of heating and ventilation functions in the existing bathroom heater, thereby providing a duct conversion structure and a bathroom heater.

[0005] To solve the above-mentioned technical problems, this utility model provides an airflow channel switching structure, including: a volute and a damper. The volute is used to install a fan assembly. The volute is provided with an airflow channel, an air supply channel and an exhaust port. The fan assembly is installed in the airflow channel. The damper is rotatably disposed in the airflow channel. The damper has a first state in which the damper closes the exhaust port, and a second state in which the damper closes the air supply channel.

[0006] In operation, the airflow within the volute is driven by the fan assembly and flows along the airflow channel. When the blowing function is needed, the damper is in its first state, rotating along the airflow channel within the volute to the exhaust port, thus sealing the exhaust port. The airflow then enters the supply air channel along the airflow channel, achieving blowing. When the ventilation function is needed, the damper is in its second state, rotating along the airflow channel within the volute to the supply air channel, thus sealing the supply air channel. The airflow then enters the exhaust port along the airflow channel, achieving ventilation. This small-scale modification, achieved through damper rotation, requires only one fan assembly, simultaneously handling both blowing and ventilation functions, reducing production costs. The airflow conversion structure provided by this invention solves the problem of increased production costs caused by the separate design of heating and ventilation functions in existing bathroom heaters.

[0007] Optionally, the damper includes an air guide section, which is configured with an arc-shaped structure. With this configuration, the arc-shaped air guide section can smoothly connect with the inner wall of the airflow channel, reducing turbulence and achieving a good air guiding effect.

[0008] Optionally, the air guide is eccentrically positioned relative to the airflow channel, with a first end of the air guide abutting against the inner wall of the airflow channel, and a second end of the air guide having a baffle extending toward the inner wall of the airflow channel. Through this configuration, the baffle and the air guide work together to seal the air supply channel or exhaust port, and the eccentrically positioned air guide forms a gradually expanding airflow guiding structure within the airflow channel, improving the airflow guiding effect.

[0009] Optionally, a reinforcing rib is provided between the baffle and the air guide. This reinforcement enhances the connection strength between the baffle and the air guide, thereby improving the stability of the damper.

[0010] Optionally, the system also includes an air collecting plate, which is detachably mounted on the volute. The air collecting plate has an air inlet and an air outlet. The air inlet is positioned opposite to the fan assembly, and the air outlet communicates with the air supply channel. The damper is rotatably connected to the air collecting plate. With this configuration, the detachable air collecting plate on the volute facilitates maintenance and repair of the fan assembly inside the volute. The air collecting plate also allows for easy installation of the damper, enabling it to rotate within the airflow channel. Driven by the fan assembly, airflow enters the airflow channel through the air inlet of the air collecting plate. When a blowing function is required, the damper rotates to the exhaust port for sealing, and the airflow is then transported through the air supply channel to the air outlet of the air collecting plate for blowing.

[0011] Optionally, a mounting bracket is detachably provided at the air inlet of the air collecting plate, and at least one rotating rod extending toward the axis of the fan assembly is provided on the damper, the rotating rod being rotatably connected to the mounting bracket. With this configuration, the damper is rotatably connected to the mounting bracket via the rotating rod. When the damper deforms or the fan assembly malfunctions, repair or replacement can be performed by disassembling the mounting bracket, effectively improving the efficiency of after-sales service.

[0012] Optionally, a rotary drive device is provided on the mounting frame, and the drive shaft of the rotary drive device passes through the mounting frame and is connected to the rotating rod. With the above configuration, the rotary drive device can automatically rotate the damper, realizing automatic switching between the unit's blowing and exhaust functions.

[0013] Optionally, the mounting bracket is provided with a first fixing hole and a second fixing hole, and the rotating rod is provided with a third fixing hole; in the first state of the damper, the first fixing hole and the third fixing hole are directly opposite each other, and the first fixing hole and the third fixing hole are connected by fasteners; in the second state of the damper, the second fixing hole and the third fixing hole are directly opposite each other, and the second fixing hole and the third fixing hole are connected by fasteners. With the above configuration, when only the single blowing function is needed, the damper rotates to the exhaust port, and the first fixing hole and the third fixing hole are connected by fasteners, so that the rotating rod is fixedly connected to the mounting bracket, thereby sealing the exhaust port; when only the exhaust function is needed, the damper rotates to the air supply channel, and the second fixing hole and the third fixing hole are connected by fasteners, so that the rotating rod is fixedly connected to the mounting bracket, thereby sealing the air supply channel; through small-scale modifications, the needs of different products can be met.

[0014] Optionally, the air inlet of the air collecting plate is provided with multiple slots circumferentially, and the edge of the mounting bracket is provided with multiple notches circumferentially. The notches are used to avoid the slots, and the slots are used to engage with the edge of the mounting bracket. With the above configuration, the notches on the mounting bracket are aligned with and avoid the slots. By rotating the mounting bracket, the edge of the mounting bracket is engaged in the slot, realizing the rotational engagement of the mounting bracket and the air collecting plate. This facilitates assembly and disassembly, effectively reduces the difficulty of assembly and disassembly, and improves work efficiency.

[0015] This utility model provides a bathroom heater, including a housing, a fan assembly, and a duct conversion structure as described in any of the above-mentioned solutions. The duct conversion structure is detachably installed inside the housing, and the fan assembly is detachably installed inside the volute. A ventilation pipe is provided on the side wall of the housing, and the ventilation pipe communicates with the exhaust port of the volute. Due to the use of the above-mentioned duct conversion structure, it possesses any of the aforementioned advantages. By independently designing the volute, fan assembly, and housing of the duct conversion structure, and detachably connecting and assembling them, when product design is required, only the volute and fan assembly need to be replaced to meet relevant iterative upgrade requirements, effectively reducing product development costs.

[0016] Optionally, a collecting plate is detachably mounted on the volute, and the collecting plate is detachably mounted on the housing. With this configuration, the collecting plate is mounted on the housing, so that the volute is located inside the housing. Furthermore, the volute, collecting plate, and housing are independently designed and detachably connected and assembled. When product design is required, only the volute needs to be replaced to meet relevant iterative upgrade requirements, effectively reducing product development costs.

[0017] Optionally, a deodorization module is detachably mounted on the mounting bracket of the air collecting plate; and / or, a heating module is detachably mounted at the air outlet of the air collecting plate; and / or, a sterilization module is detachably mounted in the air delivery channel of the volute. Through these configurations, the deodorization module can deodorize the airflow entering the air collecting plate, preventing unpleasant odors from emanating from the outlet; the heating module can heat the airflow blowing from the outlet to provide warmth; and the sterilization module can disinfect and sterilize the airflow within the air delivery channel. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of one embodiment of the air duct conversion structure provided in this utility model.

[0020] Figure 2 for Figure 1 A schematic diagram of the stroke door in its second state;

[0021] Figure 3 for Figure 1 Schematic diagram of a stroke door;

[0022] Figure 4 This is a schematic diagram showing the disassembly of the air duct conversion structure and the housing;

[0023] Figure 5 for Figure 4 Schematic diagram of CIMC air filter panel;

[0024] Figure 6 for Figure 4 A schematic diagram showing the disassembly of the mounting bracket and the air collection plate;

[0025] Figure 7 for Figure 4 A schematic diagram of the card slot being inserted into the notch;

[0026] Figure 8 for Figure 7 A schematic diagram showing the middle slot clamping the edge of the mounting bracket;

[0027] Figure 9 This is a diagram showing the disassembly of a bathroom heater / ventilation unit.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Volute; 11. Airflow channel; 12. Air supply channel; 13. Exhaust port; 2. Damper; 21. Air guide; 22. Baffle; 23. Reinforcing rib; 24. Rotating rod; 25. Third fixing hole; 3. Air collecting plate; 31. Mounting bracket; 32. First fixing hole; 33. Second fixing hole; 34. Slot; 4. Fan assembly; 5. Rotary drive device; 6. Housing; 61. Screw post; 62. Ventilation pipe; 7. Deodorization module; 8. Heating module; 81. PTC heating device; 82. Mounting frame; 9. Sterilization module. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] This embodiment provides a duct conversion structure that can combine the functions of blowing and ventilation of the whole unit with a single fan assembly 4, for switching the function of a bathroom heater.

[0035] like Figure 1 , Figure 2The diagram shows a specific implementation of a duct conversion structure provided in this embodiment, comprising: a volute 1 and a damper 2. The volute 1 is used to install a fan assembly 4. The volute 1 is provided with an airflow channel 11, an air supply channel 12, and an exhaust port 13. The airflow channel 11 is used to install the fan assembly 4. The damper 2 is rotatably disposed within the airflow channel 11. The damper 2 has a first state in which the damper 2 closes the exhaust port 13, and a second state in which the damper 2 closes the air supply channel 12.

[0036] In use, the airflow within the volute 1 flows along the airflow channel 11 under the drive of the fan assembly 4. When the blowing function is required, the damper 2 is in the first state, rotating along the airflow channel 11 within the volute 1 to the exhaust port 13, thus sealing the exhaust port 13. The airflow then enters the supply air channel 12 along the airflow channel 11, achieving blowing. When the ventilation function is required, the damper 2 is in the second state, rotating along the airflow channel 11 within the volute 1 to the supply air channel 12, thus sealing the supply air channel 12. The airflow then enters the exhaust port 13 along the airflow channel 11, achieving ventilation. This small-scale modification, achieved by rotating the damper 2, requires only one fan assembly 4, simultaneously handling both blowing and ventilation functions, reducing production costs. The airflow conversion structure provided in this embodiment solves the problem of increased production costs caused by the separate design of heating and ventilation functions in existing bathroom heaters.

[0037] like Figure 1-3 As shown, in the air duct conversion structure provided in this embodiment, the damper 2 includes an air guide portion 21, which is configured as an arc-shaped structure. The arc-shaped air guide portion 21 can smoothly connect with the inner wall of the airflow channel 11, reducing turbulence and providing good air guiding. Alternatively, as an alternative implementation, the air guide portion 21 of the damper 2 can also be configured as a planar structure.

[0038] like Figure 1-3 As shown, in the air duct conversion structure provided in this embodiment, the air guide 21 is eccentrically positioned relative to the airflow channel 11. The first end of the air guide 21 abuts against the inner wall of the airflow channel 11, and the second end of the air guide 21 is provided with a baffle 22 extending toward the inner wall of the airflow channel 11. The baffle 22 and the air guide 21 cooperate to seal the air supply channel 12 or the exhaust port 13. The eccentrically positioned air guide 21 forms a gradually expanding air guide structure within the airflow channel 11, improving the air guiding effect. Alternatively, as an alternative implementation, the baffle 22 can be omitted, and the air guide 21 can be concentrically positioned with the airflow channel 11.

[0039] like Figure 1-3 As shown, in the air duct conversion structure provided in this embodiment, a reinforcing rib 23 is provided between the baffle 22 and the air guide 21. The reinforcing rib 23 can improve the connection strength between the baffle 22 and the air guide 21, thereby improving the stability of the damper 2. Alternatively, as an alternative implementation, the reinforcing rib 23 can be omitted, and the stability can be maintained by the strength of the damper 2 itself.

[0040] like Figure 4-6 As shown, the air duct conversion structure provided in this embodiment also includes an air collecting plate 3. The air collecting plate 3 is detachably mounted on the volute 1. The air collecting plate 3 has an air inlet and an air outlet. The air inlet is opposite to the fan assembly 4, and the air outlet is connected to the air supply channel 12. The damper 2 is rotatably connected to the air collecting plate 3. The detachable air collecting plate 3 on the volute 1 facilitates the maintenance and repair of the fan assembly 4 inside the volute 1. The air collecting plate 3 also facilitates the installation of the damper 2, allowing the damper 2 to rotate within the airflow channel 11. Under the driving action of the fan assembly 4, airflow enters the airflow channel 11 through the air inlet of the air collecting plate 3. When a blowing function is required, the damper 2 rotates to the exhaust port 13 for sealing, and the airflow is delivered to the air outlet of the air collecting plate 3 through the air supply channel 12 for blowing. Alternatively, as an alternative implementation, a slide rail or rotating shaft structure can be provided inside the volute 1 to allow the damper 2 to be rotatably connected to the volute 1.

[0041] like Figure 4-6 As shown, in the air duct conversion structure provided in this embodiment, a mounting bracket 31 is detachably provided at the air inlet of the air collecting plate 3. At least one rotating rod 24 extending towards the axis of the fan assembly 4 is provided on the damper 2, and the rotating rod 24 is rotatably connected to the mounting bracket 31. The rotating rod 24 rotatably connects the damper 2 to the mounting bracket 31. When the damper 2 deforms or the fan assembly 4 malfunctions, the mounting bracket 31 can be disassembled for repair or replacement, effectively improving after-sales service efficiency. Alternatively, as an alternative embodiment, the mounting bracket 31 and the air collecting plate 3 are integrally formed.

[0042] like Figure 4 , Figure 6As shown, in the air duct conversion structure provided in this embodiment, a rotary drive device 5 is provided on the mounting frame 31, and the drive shaft of the rotary drive device 5 passes through the mounting frame 31 and is connected to the rotating rod 24. The rotary drive device 5 can realize the automatic rotation of the damper 2, realizing the automatic switching between the blowing and exhaust functions of the whole machine. Specifically, the rotary drive device 5 is set as a stepper motor. Specifically, the mounting frame 31 is provided with a hole for the drive shaft of the rotary motor to pass through. In addition, as an alternative embodiment, the rotary drive device 5 can be omitted, and the function switching can be achieved by adjusting the damper 2.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, in the duct conversion structure provided in this embodiment, the mounting bracket 31 is provided with a first fixing hole 32 and a second fixing hole 33, and the rotating rod 24 is provided with a third fixing hole 25; in the first state of the damper 2, the first fixing hole 32 and the third fixing hole 25 are directly opposite each other, and the first fixing hole 32 and the third fixing hole 25 are connected by fasteners; in the second state of the damper 2, the second fixing hole 33 and the third fixing hole 25 are directly opposite each other, and the second fixing hole 33 and the third fixing hole 25 are connected by fasteners. When only the blowing function is needed, the damper 2 rotates to the exhaust port 13, and the first fixing hole 32 and the third fixing hole 25 are connected by the fastener, so that the rotating rod 24 is fixedly connected to the mounting bracket 31, thereby closing the exhaust port 13. When only the exhaust function is needed, the damper 2 rotates to the air supply channel 12, and the second fixing hole 33 and the third fixing hole 25 are connected by the fastener, so that the rotating rod 24 is fixedly connected to the mounting bracket 31, thereby closing the air supply channel 12. Through minor modifications, the needs of different products can be met. Alternatively, as an alternative implementation, the first fixing hole 32, the second fixing hole 33, the third fixing hole 25, and the fastener can be omitted, and a cable tie structure can be provided between the mounting bracket 31 and the rotating rod 24.

[0044] like Figure 4-8As shown, in the air duct conversion structure provided in this embodiment, the air inlet of the air collecting plate 3 is provided with multiple slots 34 circumferentially, and the edge of the mounting bracket 31 is provided with multiple notches circumferentially. The notches are used to avoid the slots 34, and the slots 34 are used to engage with the edge of the mounting bracket 31. The notches on the mounting bracket 31 are aligned with and avoid the slots 34. By rotating the mounting bracket 31, the edge of the mounting bracket 31 is engaged in the slots 34, realizing the rotatable engagement of the mounting bracket 31 and the air collecting plate 3, which facilitates disassembly and assembly, effectively reduces the difficulty of disassembly and assembly, and improves work efficiency. In addition, as an alternative implementation, the mounting bracket 31 and the air collecting plate 3 can also be assembled and connected by a screw structure or a snap-fit ​​structure.

[0045] How to use:

[0046] like Figure 1 , Figure 2 As shown, the air duct conversion structure provided in this embodiment allows airflow within the volute 1 to flow along the airflow channel 11 under the drive of the fan assembly 4. When a blowing function is required, the damper 2 is in a first state, rotating along the airflow channel 11 within the volute 1 to the exhaust port 13, thus sealing the exhaust port 13. The airflow then enters the supply air channel 12 along the airflow channel 11, achieving blowing. When a ventilation function is required, the damper 2 is in a second state, rotating along the airflow channel 11 within the volute 1 to the supply air channel 12, thus sealing the supply air channel 12. The airflow then enters the exhaust port 13 along the airflow channel 11, achieving ventilation. This small-scale modification, achieved by rotating the damper 2, requires only one set of the fan assembly 4, simultaneously achieving both blowing and ventilation functions, thus reducing production costs. The air duct conversion structure provided by this utility model solves the problem of increased production costs caused by the separate design of heating and ventilation functions in existing bathroom heaters.

[0047] In addition, such as Figure 9 As shown, this embodiment also provides a bathroom heater, including a housing 6, a fan assembly 4, and the air duct conversion structure described in the above embodiments. The air duct conversion structure is detachably disposed within the housing 6, and the fan assembly 4 is detachably disposed within the volute 1. A ventilation pipe 62 is provided on the side wall of the housing 6, and the ventilation pipe 62 is connected to the exhaust port 13 of the volute 1. Due to the use of the air duct conversion structure described in the above embodiments, it possesses any of the aforementioned advantages. By independently designing and detachably connecting and assembling the volute 1, fan assembly 4, and housing 6 of the air duct conversion structure, when product design is required, only the volute 1 and fan assembly 4 need to be replaced to meet relevant iterative upgrade requirements, effectively reducing product development costs.

[0048] It should be noted that the ventilation pipe 62 can be selected according to the functional design requirements. For products that only require the blowing function, the ventilation pipe 62 may not be installed.

[0049] like Figure 4 , Figure 9 As shown, in the bathroom heater provided in this embodiment, a collector plate 3 is detachably mounted on the volute 1, and the collector plate 3 is detachably mounted on the housing 6. The collector plate 3 is mounted on the housing 6 so that the volute 1 is located inside the housing 6. The volute 1, the collector plate 3, and the housing 6 are independently designed and detachably connected and assembled. When product design is required, only the volute 1 needs to be replaced to complete the relevant iterative upgrade requirements, effectively reducing product development costs. In addition, as an alternative implementation, the collector plate 3 is detachably connected to the volute 1, and a connecting plate is provided on the volute 1 and detachably connected to the housing 6.

[0050] Specifically, the volute 1, the air collecting plate 3, the fan assembly 4, and the housing 6 are assembled and fixed by screws, clips, and other structures.

[0051] Specifically, the inner wall of the housing 6 is provided with a number of screw posts 61, and the air collecting plate 3 is provided with a number of screw holes corresponding to the screw posts 61.

[0052] like Figure 1 , Figure 2 , Figure 9 As shown, in the bathroom heater provided in this embodiment, a deodorizing module 7 is detachably mounted on the mounting bracket 31 of the air collecting plate 3; and / or, a heating module 8 is detachably mounted at the air outlet of the air collecting plate 3; and / or, a sterilization module 9 is detachably mounted in the air supply channel 12 of the volute 1. The deodorizing module 7 can deodorize the airflow entering the air inlet of the air collecting plate 3 to avoid odors in the air outlet; the heating module 8 can heat the airflow blown out of the air outlet to achieve a heating effect; the sterilization module 9 can disinfect and sterilize the airflow in the air supply channel 12; one or more of the deodorizing module 7, the heating module 8, and the sterilization module 9 can be selected according to actual design needs. In addition, as an alternative implementation, the deodorizing module 7, the heating module 8, and the sterilization module 9 can also be replaced with a filter module or other functional modules according to design needs.

[0053] Specifically, the heating module 8 includes a PTC heating device 81 and a mounting frame 82. The mounting frame 82 is used to fix the PTC heating device 81 and is installed at the air outlet of the air collecting plate 3 by fasteners.

[0054] Specifically, the fan assembly 4 includes a motor and a fan wheel. The motor is fixedly mounted on the volute 1, and the fan wheel is connected to the drive shaft of the motor.

[0055] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A duct conversion structure, characterized in that, include: The volute (1) is provided with an airflow channel (11), an air supply channel (12) and an exhaust port (13). The airflow channel (11) is used to install the fan assembly (4). A damper (2) is rotatably disposed within the airflow channel (11). The damper (2) has a first state in which the damper (2) closes the exhaust port (13). The damper (2) has a second state in which the damper (2) closes the air supply channel (12). The damper (2) includes: a guide section (21), the guide section (21) is eccentrically disposed with the airflow channel (11), the first end of the guide section (21) abuts against the inner wall of the airflow channel (11), and the second end of the guide section (21) is provided with a baffle (22) extending toward the inner wall of the airflow channel (11).

2. The air duct conversion structure according to claim 1, characterized in that, The air guide (21) is configured as an arc-shaped structure.

3. The air duct conversion structure according to claim 1, characterized in that, A reinforcing rib (23) is provided between the baffle (22) and the air guide (21).

4. The duct conversion structure according to any one of claims 1-3, characterized in that, It also includes an air collecting plate (3), which is detachably mounted on the volute (1). The air collecting plate (3) has an air inlet and an air outlet. The air inlet is disposed opposite to the fan assembly (4), and the air outlet is connected to the air supply channel (12). The damper (2) is rotatably connected to the air collecting plate (3).

5. The air duct conversion structure according to claim 4, characterized in that, The air inlet of the air collecting plate (3) is detachably provided with a mounting bracket (31), and the air damper (2) is provided with at least one rotating rod (24) extending toward the axis of the fan assembly (4), and the rotating rod (24) is rotatably connected to the mounting bracket (31).

6. The air duct conversion structure according to claim 5, characterized in that, The mounting bracket (31) is provided with a rotary drive device (5), and the drive shaft of the rotary drive device (5) passes through the mounting bracket (31) and is connected to the rotating rod (24).

7. The air duct conversion structure according to claim 5, characterized in that, The mounting bracket (31) is provided with a first fixing hole (32) and a second fixing hole (33), and the rotating rod (24) is provided with a third fixing hole (25). In the first state of the damper (2), the first fixing hole (32) and the third fixing hole (25) are directly opposite each other, and the first fixing hole (32) and the third fixing hole (25) are connected by fasteners. In the second state of the damper (2), the second fixing hole (33) and the third fixing hole (25) are directly opposite each other and are connected by fasteners.

8. The air duct conversion structure according to claim 5, characterized in that, The air inlet of the air collecting plate (3) is provided with multiple slots (34) in the circumferential direction, and the edge of the mounting bracket (31) is provided with multiple notches in the circumferential direction. The notches are used to avoid the slots (34), and the slots (34) are used to engage with the edge of the mounting bracket (31).

9. A bathroom heater, characterized in that, The device includes a housing (6), a fan assembly (4), and a duct conversion structure as described in any one of claims 1-8. The duct conversion structure is detachably disposed within the housing (6), the fan assembly (4) is detachably disposed within the volute (1), and an air exchange pipe (62) is provided on the side wall of the housing (6). The air exchange pipe (62) is connected to the exhaust port (13) of the volute (1).

10. The bathroom heater according to claim 9, characterized in that, A detachable air collecting plate (3) is provided on the volute (1), and the air collecting plate (3) is detachably provided on the box body (6).

11. The bathroom heater according to claim 10, characterized in that, The deodorization module (7) is detachably mounted on the mounting bracket (31) of the air collecting plate (3); And / or, a heating module (8) is detachably provided at the air outlet of the air collecting plate (3); And / or, a sterilization module (9) is detachably provided in the air supply channel (12) of the volute (1).

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