A bath heater

Abstract

The utility model discloses a kind of bath heater, including shell and blowing assembly, blowing assembly includes motor and the wind wheel of motor transmission connection, wind wheel includes the inner wind wheel and outer wind wheel of being fixed together coaxially and sequentially arranging along its radial direction, the blowing direction of two opposites;One in inner wind wheel and outer wind wheel is used for ventilation, and is placed in the ventilation air duct of being set in shell, another in inner wind wheel and outer wind wheel is used for air supply, and is placed in the air supply air duct of being set in shell;The bottom of shell is equipped with the ventilation air inlet of ventilation air duct intercommunication and the air supply outlet of air supply air duct intercommunication, the top of shell is equipped with the ventilation outlet of ventilation air duct intercommunication and the air supply air inlet of air supply air duct intercommunication.The utility model can realize blowing warm air and ventilation function simultaneously, not only promote indoor temperature, but also timely improve air quality, fully satisfy the demand of user to warm and dry environment when bathing.

Description

Technical Field

[0001] This utility model relates to the field of bathroom fixtures, and in particular to a bathroom heater / ventilation unit. Background Technology

[0002] When showering in winter, users usually need to turn on the bathroom heater to raise the indoor temperature. However, this process generates a lot of water vapor, leading to two problems in the bathroom environment: First, the large amount of steam fills the space, causing a decrease in the oxygen content of the air, which can easily cause breathing difficulties and discomfort; second, when the high-temperature steam encounters cooler surfaces such as walls and ceilings, it will quickly condense into water droplets, causing the surface to be damp and accumulating water droplets. This not only brings an uncomfortable user experience but also easily breeds mold, affecting indoor hygiene.

[0003] To address the aforementioned issues, existing bathroom heater products generally offer both air blowing and ventilation functions. However, due to limitations in their structural design, these two functions are typically achieved by two independent fan systems. Furthermore, it is difficult to simultaneously blow air during ventilation, or to effectively remove moisture while blowing air. Consequently, they cannot maintain room temperature while simultaneously improving air quality, making it difficult to meet users' comprehensive needs for indoor temperature and a dry environment during bathing. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by providing a bathroom heater that, through structural optimization, can simultaneously achieve the functions of blowing air and ventilation.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a bathroom heater, including a housing and a blower assembly, the blower assembly including a motor and a fan wheel connected to the motor, the axis of the fan wheel extending in the vertical direction; the fan wheel includes an inner fan wheel and an outer fan wheel coaxially fixed together and arranged in sequence along its radial direction, the two blowing in opposite directions; one of the inner fan wheel and the outer fan wheel is used for ventilation and is placed in a ventilation duct provided in the housing, the other of the inner fan wheel and the outer fan wheel is used for air supply and is placed in an air supply duct provided in the housing; the bottom of the housing is provided with a ventilation inlet connected to the ventilation duct and an air supply outlet connected to the air supply duct, and the top of the housing is provided with a ventilation outlet connected to the ventilation duct and an air supply inlet connected to the air supply duct.

[0006] In a preferred embodiment, a first partition is provided between the inner impeller and the outer impeller. The first partition is annular and coaxially arranged with the impeller.

[0007] In a preferred embodiment, the inner impeller includes a plurality of first blades spaced apart along its circumference, and the outer impeller includes a plurality of second blades spaced apart along its circumference; the tail portion of each first blade is fixed to the inner side of the first partition; and the root portion of each second blade is fixed to the outer side of the first partition.

[0008] In a preferred embodiment, the helical direction of the first blade and the helical direction of the second blade are opposite in the axial direction of the wind turbine.

[0009] In a preferred embodiment, the housing is provided with a partition structure, which includes a second partition extending upward from the bottom wall of the housing in an annular shape and / or a third partition extending downward from the top wall of the housing in an annular shape. The partition structure is coaxially arranged with the first partition and is connected to or forms a clearance fit, so that the internal space of the first partition and the internal space of the partition structure together form one of the ventilation channel and the air supply channel, and the other of the ventilation channel and the air supply channel is formed between the outer side of the first partition and the outer side of the partition structure and the inner side of the housing.

[0010] In a preferred embodiment, a heater is also included, which is disposed within the air supply duct and located between the impeller and the air supply outlet.

[0011] In a preferred embodiment, the inner impeller is used for ventilation, the outer impeller is used for air supply, and the air supply channel is located around the ventilation channel.

[0012] In a preferred embodiment, a fourth partition is further provided in the air supply channel. The fourth partition is annular and coaxially arranged with the impeller. The fourth partition divides the air supply channel into a first air duct and a second air duct located around the first air duct. The outer impeller is placed in the first air duct. The bottom wall of the housing is provided with an auxiliary air inlet communicating with the second air duct. The fourth partition is provided with an air outlet communicating with the first air duct and the second air duct. The air outlet is located above the outer impeller. A heater is also provided in the first air duct between the outer impeller and the air supply outlet.

[0013] In a preferred embodiment, the top wall of the housing is provided with an upwardly protruding fifth partition, which is annular and coaxially arranged with the impeller, and the fifth partition separates the air exchange outlet and the air supply inlet; the air exchange outlet is located within the range of the fifth partition.

[0014] In a preferred embodiment, the housing is a box-type structure, which includes a box body and a cover. The top wall of the box body is provided with the air exchange outlet and the air supply inlet. The bottom end of the box body is provided with an opening. The cover is sealed at the opening of the box body, and the cover is provided with the air exchange inlet and the air supply outlet.

[0015] In a preferred embodiment, the cover includes a panel and a ventilation mesh. The panel has a hollow hole in the middle, the ventilation mesh is nested in the hollow hole, and the ventilation mesh has the air exchange inlet and the air supply outlet.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The impeller of this utility model includes an inner impeller and an outer impeller coaxially fixed together and arranged radially in sequence. Their airflow directions are opposite. One of the inner and outer impellers is used for ventilation and is placed in a ventilation duct within the housing. The other of the inner and outer impellers is used for air supply and is placed in an air supply duct within the housing. This design allows the utility model to simultaneously achieve both ventilation and airflow functions, not only raising or maintaining indoor temperature but also improving air quality in a timely manner, fully meeting the user's needs for indoor temperature and a dry environment during bathing.

[0018] 2. As a preferred embodiment, a first baffle is provided between the inner and outer impellers. This further optimizes the airflow design, ensuring that the airflow between the inner and outer impellers does not interfere with each other, thus improving ventilation and air delivery efficiency. The first baffle also prevents airflow short-circuiting, ensuring that the airflow flows along a predetermined path, thereby improving overall performance and user experience. Furthermore, the tail of the first blade of the inner impeller is fixed to the inner side of the first baffle; the root of the second blade of the outer impeller is fixed to the outer side of the first baffle. This design enhances the structural stability of the inner and outer impellers, enabling them to maintain a good balance during high-speed rotation and reducing vibration and noise.

[0019] 3. As a preferred embodiment, the housing is internally equipped with the aforementioned partition structure, such that the internal space of the first partition and the internal space of the partition structure together form one of the ventilation channel and the air supply channel, and the outer side of the first partition and the outer side of the partition structure forms the other of the ventilation channel and the air supply channel with the inner side of the housing. This design ensures complete airflow separation, reduces airflow noise, avoids airflow mixing, and improves system efficiency; it also maximizes the use of the internal space of the housing, making the entire structure more compact and easier to install and maintain. In particular, this design also allows the ventilation channel, air supply channel, inner impeller, and outer impeller to work together, ensuring coordinated operation between components and further improving overall performance.

[0020] 4. As a preferred embodiment, the ventilation channel is further provided with a fourth partition, which divides the ventilation channel into a first air duct and a second air duct. The outer impeller is placed in the first air duct, and the bottom of the housing is provided with an auxiliary air inlet connecting to the second air duct. The fourth partition is provided with an air outlet connecting the first and second air ducts, which is located above the outer impeller. This design allows air to enter the air supply channel from two directions, increasing the air intake and thus improving the air supply efficiency.

[0021] 5. As a preferred embodiment, the top wall of the housing is provided with an upwardly protruding fifth partition, which separates the air exchange outlet and the air supply inlet, preventing mutual interference between the air intake and exhaust. In particular, when the air exchange outlet is located within the range of the fifth partition, the fifth partition can also be directly used to connect the air duct, so as to facilitate the exhaust of indoor air to the outside.

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the present invention is not limited to the embodiments. Attached Figure Description

[0023] Figure 1 This is an exploded view of the bathroom heater of this utility model;

[0024] Figure 2 This is a three-dimensional structural diagram of the wind turbine of this utility model. Figure 1 (Reflecting a positive aspect)

[0025] Figure 3 This is a three-dimensional structural diagram of the wind turbine of this utility model. Figure 2 (Representation of the reverse side);

[0026] Figure 4 This is a three-dimensional structural diagram of the wind net of this utility model. Figure 1 (Reflecting a positive aspect);

[0027] Figure 5 This is a three-dimensional structural diagram of the wind net of this utility model. Figure 2 (Representation of the reverse side);

[0028] Figure 6 This is a three-dimensional structural diagram of the box body of this utility model. Figure 1 (Reflecting a positive aspect);

[0029] Figure 7 This is a three-dimensional structural diagram of the box body of this utility model. Figure 2 (Representation of the reverse side);

[0030] Figure 8 This is a three-dimensional structural diagram of the bathroom heater of this utility model. Figure 1 (Reflecting a positive aspect);

[0031] Figure 9This is a three-dimensional structural diagram of the bathroom heater of this utility model. Figure 2 (Representation of the reverse side);

[0032] Figure 10 This is a bottom view of the bathroom heater of this utility model;

[0033] Figure 11 This is a schematic diagram of the air supply of this utility model (for...). Figure 10 (AA section view);

[0034] Figure 12 This is a schematic diagram of the ventilation of this utility model (for...). Figure 10 (AA section view);

[0035] Figure 13 yes Figure 12 An enlarged schematic diagram of part B;

[0036] In the diagram, 1. Housing; 11. Air outlet; 12. Air inlet; 13. Third partition; 14. Fourth partition; 141. Air vent; 142. Mounting hole; 15. Fifth partition; 2. Motor; 3. Heater; 31. Mounting part; 4. Inner impeller; 41. First blade; 42. Axle; 5. Outer impeller; 51. Second blade; 52. First partition; 6. Air mesh; 61. Air inlet; 62. Air outlet; 63. Second partition; 7. Panel; 71. Auxiliary air inlet; 8. Air exchange channel; 9. Air supply channel; 91. First air duct; 92. Second air duct. Detailed Implementation

[0037] In this utility model, the terms "first," "second," and "third," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "inner," "outer," "top," and "bottom" to indicate orientation or positional relationships is based on the accompanying drawings or the actual installation state of the bathroom heater, and is only for the convenience of describing this utility model, not to indicate or imply that the device must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation on the scope of protection of this utility model. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] Furthermore, in the description of this utility model, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0039] Please see Figures 1-12 As shown, this utility model discloses a bathroom heater, including a housing and a blower assembly. The blower assembly includes a motor 2 and a fan wheel that is driven and connected to the motor 2. The axis of the fan wheel is located as shown in the figure. Figure 11 As shown in the vertical direction, the impeller includes an inner impeller 4 and an outer impeller 5, which are coaxially fixed together and arranged radially in sequence, with opposite airflow directions. One of the inner impeller 4 and the outer impeller 5 is used for ventilation and is placed in a ventilation duct provided within the housing, while the other of the inner impeller 4 and the outer impeller 5 is used for air supply and is placed in an air supply duct provided within the housing. The bottom of the housing is provided with a ventilation inlet 61 connected to the ventilation duct and an air supply outlet 62 connected to the air supply duct, and the top of the housing is provided with a ventilation outlet 11 connected to the ventilation duct and an air supply inlet 12 connected to the air supply duct.

[0040] In a preferred embodiment, the present invention further includes a heater 3, which is disposed within the air supply duct and located between the impeller and the air outlet 62. The heater 3 allows warm air to be blown out from the air outlet 62.

[0041] In this embodiment, the inner impeller 4 is used for ventilation, the outer impeller 5 is used for air supply, the air supply channel 9 is located around the ventilation channel 8, and the heater 3 is specifically located between the outer impeller 5 and the air supply outlet 62. In other embodiments, the inner impeller 4 is used for air supply, the outer impeller 5 is used for ventilation, and the ventilation channel 8 is located around the air supply channel 9.

[0042] like Figure 1 , Figures 6-9 As shown, the casing is a box-type structure, comprising a box body 1 and a cover. The top wall of the box body 1 is provided with an air outlet 11 and an air inlet 12. The bottom end of the box body 1 has an opening, and the cover seals the opening of the box body 1, and is provided with an air inlet 61 and an air outlet 62. In this embodiment, the cover includes a panel 7 and a circular air mesh 6. The panel 7 has a perforated hole in the center, and the air mesh 6 is nested in the perforated hole, and the air mesh 6 is provided with an air inlet 61 and an air outlet 62. Specifically, as shown... Figure 4 As shown, the central part of the air network 6 is plate-shaped and has an air inlet 61. This air inlet 61 has a mesh structure, comprising multiple small circular holes arranged in a ring array. The air outlet 62 is located on the outer periphery of the air network 6, and the air outlet 62 has a grid structure, comprising multiple arc-shaped elongated grids arranged in a ring array. Figure 6 As shown, the ventilation outlet 11 is located in the middle of the top wall of the housing 1, and the ventilation outlet 11 adopts a grid structure, which includes multiple elongated holes distributed in a ring array; the air supply inlet 12 is located around the ventilation outlet 11, and the air supply inlet 12 adopts a mesh structure, which includes multiple small circular holes distributed in a ring array.

[0043] like Figure 2 , Figure 3 As shown, a first partition 52 is provided between the inner impeller 4 and the outer impeller 5. The first partition 52 is annular and coaxially arranged with the impeller. The first partition 52 ensures that the airflow between the inner impeller 4 and the outer impeller 5 does not interfere with each other, improving ventilation and air supply efficiency. The inner impeller 4 includes a plurality of first blades 41 spaced apart along its circumference, and the outer impeller 5 includes a plurality of second blades 51 spaced apart along its circumference. The tail of each first blade 41 is fixed to the inner side of the first partition 52, and the root of each second blade 51 is fixed to the outer side of the first partition 52. The inner impeller 4 also includes a wheel axle 42, and the root of each first blade 41 is fixed to the outer side of the wheel axle 42. Specifically, in this embodiment, the wheel axle 42, the first blades 41, the first partition 52, and the second blades 51 are integrally formed. This design not only achieves coaxial fixation of the inner impeller 4 and the outer impeller 5, but also enhances the structural stability of the inner impeller 4 and the outer impeller 5, enabling them to maintain a good balance during high-speed rotation and reducing vibration and noise. The axle 42 of the inner impeller 4 is hollow and is coaxially fixed to the output shaft of the motor 2. The motor 2 is located inside the ventilation duct and fixed to the top wall of the housing. Specifically, the motor 2 is installed in the middle of the bottom surface of the top wall of the housing 1. Figure 11 , Figure 12 As shown in the two figures, the orientation of the bathroom heater is opposite to its actual installation and usage orientation. This invention uses "up," "down," "inner," "outer," "top," and "bottom" as indicators of orientation or positional relationships based on the actual installation state of the bathroom heater. In the actual installation state, the side of the bathroom heater or its various components facing downwards is the front, and the side facing upwards is the back.

[0044] like Figure 2 , Figure 3 As shown, the spiral direction of the first blade 41 and the spiral direction of the second blade 51 are opposite in the axial direction of the wind turbine. Specifically, the arc surface of the second blade 51 of the outer wind turbine 5 faces upward, and the arc surface of the first blade 41 of the inner wind turbine 4 faces downward, so as to achieve that the wind direction of the outer wind turbine 5 and the inner wind turbine 4 are opposite.

[0045] In a preferred embodiment, the housing has an internal partition structure comprising a second partition 63 extending upward from the bottom wall of the housing in an annular shape and / or a third partition 13 extending downward from the top wall of the housing in an annular shape. This partition structure is coaxially arranged with the first partition 13 and is either in contact with or clearance-fitted with it, so that the internal space of the first partition 52 and the internal space of the partition structure together form one of the ventilation channel 8 and the air supply channel 9, and the outer side of the first partition 52 and the outer side of the partition structure are connected to the inner side of the housing to form the other of the ventilation channel 8 and the air supply channel 9. This design ensures complete airflow separation, reduces airflow noise, avoids airflow mixing, and improves system efficiency; it also maximizes the use of the internal space of the housing, making the entire structure more compact and easier to install and maintain. In particular, this design also allows the ventilation channel 8, the air supply channel 9, the inner impeller 4, and the outer impeller 5 to work together, ensuring coordinated operation between components and further improving overall performance.

[0046] Since the shell is a box-type structure, it includes a box body 1 and a cover. Therefore, the top wall of the shell is the top wall of the box body 1, and the bottom wall of the shell is formed by the cover. In this embodiment, the bottom wall of the shell is provided with a second partition 63 and the top wall of the shell is provided with a third partition 13 as an example, but it is not limited to this. Specifically, the second partition 63 is provided on the air mesh 6 of the cover, such as... Figure 5 As shown; the third partition 13 is located on the top wall of the box 1, as... Figure 6 As shown. Furthermore, the partition 63 is integrally formed with the air mesh 6, and the third partition 13 is integrally formed with the top wall of the housing 1.

[0047] Therefore, in this embodiment, the internal space of the first partition 52, the internal spaces of the second partition 63, and the third partition 13 together form the ventilation channel 8, and the space between the outer side of the first partition 52, the outer side of the second partition 63, the outer side of the third partition 13, and the inner side of the housing 1 together form the air supply channel 9. Figure 11 As shown.

[0048] Furthermore, such as Figure 6 , Figure 11As shown, a fourth partition 14 is also provided in the ventilation channel 8. The fourth partition 14 is annular and coaxially arranged with the impeller. The fourth partition 14 divides the air supply channel 9 into a first air duct 91 and a second air duct 92 located outside the first air duct 91. The outer impeller 5 and the heater 3 are placed in the first air duct 91. The bottom wall of the housing is provided with an auxiliary air inlet 71 that connects to the second air duct 92. The fourth partition 14 is provided with an air outlet 141 that connects the first air duct 91 and the second air duct 92. The air outlet 141 is located above the outer impeller 5. This design allows air to enter the air supply channel 9 from two directions, increasing the air intake and thus improving the air supply efficiency. Specifically, the fourth partition 14 is located on the top wall of the housing 1 and extends downward; the auxiliary air inlet 71 is located on the cover, specifically on the panel 7 of the cover, and the auxiliary air inlet 71 adopts a mesh structure, which includes multiple small circular holes distributed in a ring array, such as... Figure 1 , Figure 8 As shown. The air vent 141 consists of multiple elongated holes spaced circumferentially along the top of the fourth partition 14, as shown. Figure 6 As shown. The heater 3 is annular, and its outer surface is provided with a plurality of evenly distributed mounting parts 31. These mounting parts 31 are respectively inserted into the mounting holes 142 corresponding to those provided in the fourth partition 14, as shown. Figure 1 , Figure 6 As shown.

[0049] In a preferred embodiment, the top wall of the housing is provided with an upwardly protruding fifth partition 15. This fifth partition 15 is annular and coaxially arranged with the impeller. The fifth partition 15 separates the ventilation outlet 11 and the air inlet 12, and the ventilation outlet 11 is located within the area of ​​the fifth partition 15. Specifically, the fifth partition 15 is located on the top surface of the top wall of the housing 1, and the two are integrally formed, such as... Figure 9 As shown. The fifth partition 15 can prevent the intake and exhaust air from interfering with each other, and can be directly used to connect to the air duct so that indoor air can be exhausted to the outside.

[0050] The working principle of this utility model of a bathroom heater is as follows: When the motor 2 is working, the motor 2 drives the inner impeller 4 and the outer impeller 5 to rotate synchronously. A negative pressure zone is generated around the outer impeller 5, and air enters the air supply duct 9 from two directions: on the one hand, air enters the second air duct 92 from the auxiliary air inlet 71 on the panel 7, and then is output to the first air duct 91 through the air outlet 141 on the fourth partition 14; on the other hand, air enters the first air duct 91 directly from the air supply inlet 12 on the top wall of the housing 1. These two airflows converge in the first air duct 91, are blown out by the outer impeller 5, and are heated by the heater 3 to form warm air, which is finally blown out from the air outlet 62 on the air mesh 6. Figure 11As shown. Simultaneously, under the blowing action of the inner impeller 4, air enters the ventilation duct from the air inlet 61 on the air mesh 6, passes through the inner impeller 4, and is blown out from the air outlet 11 on the top wall of the housing 1, as shown. Figure 12 As shown.

[0051] Therefore, this invention can simultaneously deliver warm air and ventilate, effectively heating and ventilating the space where the bathroom heater is located (e.g., the bathroom). While providing indoor heating, it effectively removes indoor moisture, thereby maintaining room temperature while improving air quality in a timely manner, meeting the user's comprehensive needs for a warm and dry environment during bathing.

[0052] This design not only improves air circulation efficiency but also optimizes heating and ventilation effects, significantly enhancing user comfort and experience.

[0053] The parts of this utility model that are not described are the same as or can be implemented using existing technology.

[0054] The above embodiments are only used to further illustrate a bathroom heater of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A bathroom heater, comprising a housing and a blower assembly, the blower assembly including a motor and a fan wheel drivenly connected to the motor, the axis of the fan wheel extending in a vertical direction; characterized in that: The impeller includes an inner impeller and an outer impeller, which are coaxially fixed together and arranged radially in sequence, with opposite air blowing directions. One of the inner and outer impellers is used for ventilation and is placed in a ventilation duct provided inside the housing. The other of the inner and outer impellers is used for air supply and is placed in an air supply duct provided inside the housing. The bottom of the housing is provided with a ventilation inlet connected to the ventilation duct and an air supply outlet connected to the air supply duct. The top of the housing is provided with a ventilation outlet connected to the ventilation duct and an air supply inlet connected to the air supply duct.

2. The bathroom heater according to claim 1, characterized in that: A first partition is provided between the inner and outer wind turbines. The first partition is annular and coaxial with the wind turbines.

3. The bathroom heater according to claim 2, characterized in that: The inner impeller includes a plurality of first blades spaced apart along its circumference, and the outer impeller includes a plurality of second blades spaced apart along its circumference; the tail portion of each first blade is fixed to the inner side of the first partition, and the root portion of each second blade is fixed to the outer side of the first partition; the inner impeller also includes a wheel axle, and the roots of the plurality of second blades are fixed to the outer side of the wheel axle; the wheel axle is coaxially and fixedly connected to the output shaft of the motor.

4. The bathroom heater according to claim 3, characterized in that: The helical direction of the first blade and the helical direction of the second blade are opposite in the axial direction of the wind turbine.

5. The bathroom heater according to claim 2, characterized in that: The housing is provided with a partition structure, which includes a second partition extending upward from the bottom wall of the housing in an annular shape and / or a third partition extending downward from the top wall of the housing in an annular shape. The partition structure is coaxially arranged with the first partition and is connected to or forms a clearance fit, so that the internal space of the first partition and the internal space of the partition structure together form one of the ventilation channel and the air supply channel, and the other of the ventilation channel and the air supply channel is formed between the outer side of the first partition and the outer side of the partition structure and the inner side of the housing.

6. The bathroom heater according to claim 1, characterized in that: It also includes a heater, which is disposed in the air supply duct and located between the impeller and the air supply outlet.

7. The bathroom heater according to any one of claims 1-6, characterized in that: The inner impeller is used for air exchange, the outer impeller is used for air supply, and the air supply channel is located outside the air exchange channel.

8. The bathroom heater according to claim 7, characterized in that: The air supply channel is further provided with a fourth partition, which is annular and coaxially arranged with the impeller. The fourth partition divides the air supply channel into a first air duct and a second air duct located outside the first air duct. The outer impeller is placed in the first air duct. The bottom wall of the housing is provided with an auxiliary air inlet that connects to the second air duct. The fourth partition is provided with an air outlet that connects the first air duct and the second air duct. The air outlet is located above the outer impeller. A heater is also provided in the first air duct between the outer impeller and the air supply outlet.

9. The bathroom heater according to any one of claims 1-6, characterized in that: The top wall of the housing is provided with an upwardly protruding fifth partition. The fifth partition is annular and coaxially arranged with the impeller. The fifth partition separates the air exchange outlet and the air supply inlet. The air exchange outlet is located within the range of the fifth partition.

10. The bathroom heater according to any one of claims 1-6, characterized in that: The housing is a box-type structure, which includes a box body and a cover. The top wall of the box body is provided with the air exchange outlet and the air supply inlet. The bottom end of the box body is provided with an opening. The cover is sealed at the opening of the box body, and the cover is provided with the air exchange inlet and the air supply outlet.

11. The bathroom heater according to claim 10, characterized in that: The cover includes a panel and a ventilation mesh. The panel has a hollow hole in the middle, and the ventilation mesh is nested in the hollow hole. The ventilation mesh has the air exchange inlet and the air supply outlet.

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