Switchable warm air bladeless fan structure

Abstract

The present application belongs to the fan technical field, especially to the switchable warm air bladeless fan structure, including the cylinder shell, the turbofan fan, the shell and the electric heating net, the cylinder shell includes the top plate, the bottom plate and the support component arranged between the top plate and the bottom plate, the turbofan fan is provided with the air outlet in the cylinder shell, the shell is rotatably connected between the top plate and the bottom plate, the outer side of the support component has the sealing surface, the first air duct and the second air duct are arranged on the shell, the electric heating net is arranged in the second air duct, the outer side of the second air duct is covered with the mesh plate, the shell includes the first position and the second position, the electric heating net covers the air outlet when the shell is in the first position, and the sealing surface blocks the first air duct, the first air duct is located at the mouth of the air outlet when the shell is in the second position, the first air duct is sealed by the sealing surface when the shell is in the second position, and the foreign matter can be prevented from entering the shell interior from the first air duct to cause the jamming and other problems.

Description

Technical Field

[0001] This invention belongs to the field of fans, and particularly relates to a switchable warm air bladeless fan structure. Background Technology

[0002] Bladeless fans increase airflow by expelling air through the air outlet of the duct, and are favored by consumers for their safety, cleanliness, and aesthetic appeal.

[0003] Chinese utility model patent document CN220354067U discloses a cooling and heating fan, comprising: a housing having an air inlet, a first air outlet, and a second air outlet; an air duct rotatably disposed within the housing and switchable between a first position and a second position; a fan assembly disposed within the air duct; and a heating element connected to the housing and disposed at the first air outlet. When the air duct is in the first position, one end of the air duct is connected to the air inlet, and the other end is connected to the first air outlet; air enters the air duct from the first air inlet, passes through the heating element, and exits from the first air outlet. When the air duct is in the second position, one end of the air duct is connected to the air inlet, and the other end is connected to the second air outlet; air enters the air duct from the air inlet and exits from the second air outlet. Because the housing has an air inlet, a first air outlet, and a second air outlet, and the air duct is rotatably installed inside the housing and can switch between the first and second positions, the fan assembly is located inside the air duct, and the heating element is connected to the housing and located at the first air outlet. Therefore, when the fan is in heating mode, the air duct rotates inside the housing so that when the air duct is in the first position, one end of the air duct is connected to the air inlet, and the other end is connected to the first air outlet. Air enters the air duct from the air inlet, passes through the heating element, and is discharged from the first air outlet. The heating element heats the air. Air is exhausted from the air outlet to ensure the heating effect of the fan and improve the user experience. In the cool air mode, the air duct rotates within the casing to a second position, with one end connected to the air inlet and the other to the second air outlet. Air enters the duct from the air inlet and exits from the second air outlet. This means the heating element is not inside the duct and does not obstruct the air outlet, preventing it from blocking the cool airflow. This effectively increases the volume of cool air output, improves the cooling effect of the fan, enhances the user experience, and allows for switching between cool and warm air modes. The fan also includes a filter connected to the casing, supported by the casing. The filter is located inside the first air inlet. In the warm air mode, air enters the duct through the first air inlet, and the filter removes impurities from the air, preventing them from entering the duct and blocking the gaps between adjacent heating elements, ensuring safety.

[0004] The aforementioned patent documents disclose a hot and cold air blower that uses a drive mechanism to rotate the air duct to switch between a first air outlet and a second air outlet. When the air duct is in the position of the first air outlet, it blows warm air. At this time, the incoming airflow can be filtered by a filter device to effectively prevent impurities from adhering to the heating element. However, since the air duct is located at the first air outlet, but the second air outlet is open, and the blower is generally placed on the ground, there is a risk that foreign objects may enter the housing through the second air outlet. Furthermore, foreign objects entering the housing cannot be detected, which can lead to jamming or even damage to the air duct when switching positions. Summary of the Invention

[0005] The purpose of this invention is to provide a switchable bladeless fan structure for warm air. By rotating the outer shell, the two air ducts can be switched at the air outlet position. In warm air mode, the sealing surface blocks the first air duct, which can prevent foreign objects from entering and causing problems such as jamming of the internal structure.

[0006] To achieve the above objectives, this invention provides a switchable bladeless fan structure for warm air, comprising a cylindrical shell, a turbo fan, an outer shell, and an electric heating mesh. The cylindrical shell includes a top plate, a bottom plate, and a supporting member disposed between the top plate and the bottom plate. A cavity is formed between the top plate and the bottom plate, and the turbo fan is disposed within the cavity, having an air outlet facing one side of the cylindrical shell. The outer shell is rotatably connected between the top plate and the bottom plate, forming a closed cavity. The supporting member and the cavity are enclosed within the cavity, and the outer side of the supporting member has a sealing surface. The outer shell has a first air duct opening and a second air duct opening, with the electric heating mesh disposed within the second air duct opening, and a mesh plate covering the outer side of the second air duct opening. The outer shell includes a first position and a second position. In the first position, the electric heating mesh covers the air outlet, and the sealing surface blocks the first air duct opening. In the second position, the first air duct opening is located at the opening of the air outlet.

[0007] Furthermore, a frame extends inward from the edge of the second air duct opening, and the electric heating mesh is disposed within the frame.

[0008] Furthermore, the inner side of the top plate and / or the bottom plate is provided with a track groove, the track groove including a first end and a second end; the outer shell is provided with a limiting member extending into the track groove, the first end and the second end blocking the limiting member.

[0009] Furthermore, an inwardly extending mounting frame is provided at the edge of the first air duct opening, and multiple guide plates are rotatably connected within the mounting frame. The guide plates can close and open the first air duct opening.

[0010] Furthermore, the inner side of the top plate or the bottom plate is provided with a toggle groove, and each of the guide plates is provided with a push rod extending into the toggle groove; the toggle groove includes an opening section, a closing section and a transition section; the transition section connects the opening section and the closing section, the opening section is used to push the guide plate to rotate and open the first air duct opening, and the closing section is used to push the guide plate to close the first air duct opening.

[0011] Furthermore, the outer casing is in the first position, and the sealing surface is in contact with the inner side of the guide plate or with the inner port of the mounting frame.

[0012] Furthermore, each of the guide vanes is rotatably disposed within the mounting frame about a horizontal axis; a connecting rod assembly connects each of the guide vanes, enabling them to move in tandem; a pushing slope is provided on one side of the support member, the pushing slope being used to push the connecting rod assembly, causing each of the guide vanes to close the first air duct opening.

[0013] Furthermore, each of the guide vanes is rotatably disposed within the mounting frame about a horizontal axis; a linkage assembly connects each of the guide vanes, enabling them to move in tandem; the linkage assembly is connected to an electric component, which drives the linkage assembly to reciprocate, causing each of the guide vanes to swing up and down.

[0014] Furthermore, an air inlet is provided on the top side of the cylindrical shell, and a mesh plate is provided in the air inlet, with a filter screen removably installed inside the mesh plate.

[0015] Furthermore, a rotating seat is provided on the bottom side of the cylindrical shell, and a rotating drive component is provided inside the rotating seat, which drives the cylindrical shell to rotate.

[0016] The switchable bladeless warm air fan structure provided in this invention has at least the following technical effects: This switchable bladeless fan allows the outer casing to be rotated, switching between a first position and a second position. In the first position, the outer casing is rotated to the heating element, which covers the air outlet. The heating element heats the air, and the airflow generated by the turbofan blows from the air outlet onto the heating element, heating the airflow before it exits through the second air duct, achieving a warm air effect. In the second position, the outer casing is rotated to the air outlet, allowing airflow to exit directly from the first air duct, achieving a cool air effect. When the outer casing is in the first position, the first air duct opening is located on one side of the sealing surface, which seals the opening. This not only prevents airflow from entering the cavity through the first air duct but also prevents foreign objects from entering the casing through the first air duct opening and causing jamming. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a switchable bladeless warm air fan structure is provided for an embodiment of the present invention.

[0019] Figure 2 This is a cross-sectional view of a switchable bladeless fan structure for heating provided in an embodiment of the present invention.

[0020] Figure 3 An internal structural diagram of a switchable bladeless warm air fan structure is provided for embodiments of the present invention.

[0021] Figure 4 This is a schematic diagram of the base plate of the switchable bladeless warm air fan structure provided in an embodiment of the present invention.

[0022] Figure 5 This is a cross-sectional view of the mounting frame of the switchable bladeless warm air fan structure provided in an embodiment of the present invention, with the frame broken along the bottom side. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0024] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0027] In one embodiment of the switchable bladeless warm air fan structure of the present invention, please refer to... Figures 1 to 3 The switchable bladeless fan structure of this embodiment includes a cylindrical shell 100, a turbo fan 200, an outer shell 300, and an electric heating grid 400.

[0028] The cylindrical shell 100 includes a top plate 110, a bottom plate 120, and a supporting member 130 disposed between the top plate 110 and the bottom plate 120. (Refer to...) Figures 1 to 3 Preferably, the top plate 110 and the bottom plate 120 are screwed onto the support member 130. A cavity 101 is formed between the top plate 110 and the bottom plate 120, and a turbofan 200 is installed inside the cavity 101. The turbofan 200 has an air outlet 201 facing the side of the shell 100. The outer shell 300 is rotatably connected between the top plate 110 and the bottom plate 120, forming a closed cavity that encloses the support member 130 and the cavity 101. The outer side of the support member 130 has a sealing surface 131. The outer shell 300 is provided with a first air duct 301 and a second air duct 302. An electric heating mesh 400 is provided inside the second air duct 302, and a mesh plate 310 covers the outer side of the second air duct 302 to prevent foreign objects from entering the second air duct 302.

[0029] The outer casing 300 includes a first position and a second position. When the outer casing 300 is in the first position, the second air duct opening 302 is located at the opening of the air outlet 201, and the electric heating mesh 400 covers the air outlet 201, while the sealing surface 131 blocks the first air duct opening 301. Therefore, foreign objects can be prevented from entering the interior of the outer casing 300 through the first air duct opening 301, thus preventing problems such as the outer casing 300 from rotating and jamming. When the outer casing 300 is in the second position, the first air duct opening 301 is located at the opening of the air outlet 201. Preferably, a motor mechanism (not shown in the attached figure) is provided inside the outer casing 300 to drive the rotation of the outer casing 300, and the outer casing 300 is switched between the first position and the second position by the electric mechanism.

[0030] In this embodiment, when the warm air mode is needed, the outer casing 300 is rotated to the first position, and the electric heating mesh 400 covers the air outlet 201. At this time, the electric heating mesh 400 heats up, and the airflow generated by the turbofan 200 blows from the air outlet 201 onto the electric heating mesh 400, thereby heating the airflow, which is then blown out from the second air duct 302 to achieve a warm air effect. When the cold air mode is needed, the outer casing 300 is rotated to the second position, at which time the first air duct 301 is located at the air outlet 201 position, and the airflow can be directly blown out from the first air duct 301 to achieve the cold air mode.

[0031] Furthermore, refer to Figure 2 and Figure 3 A frame 320 extends inward from the edge of the second air duct opening 302, and the electric heating mesh 400 is installed inside the frame 320. The frame 320 facilitates the installation of the electric heating mesh 400. Preferably, the electric heating mesh 400 is a PTC heating element. More preferably, a sealing ring 202 is provided at the opening of the air outlet 201, and a flange 321 extends outward from the edge of the opening of the frame 320. When the second air duct opening 302 is located at the opening position of the air outlet 201, the flange 321 cooperates with the sealing ring 202 to achieve a sealing effect, thus allowing all the airflow from the air outlet 201 to exit through the second air duct opening 302.

[0032] Furthermore, refer to Figure 2 and Figure 4 The top plate 110 and / or the bottom plate 120 are provided with a track groove 102, which includes a first end and a second end. The outer shell 300 is provided with a limiting member 303 extending into the track groove 102, and the first end and the second end block the limiting member 303. In this embodiment, when the outer shell 300 rotates, the limiting member 303 slides in the track groove 102 to limit the rotation of the outer shell 300. Specifically, the limiting member 303 slides in the track groove 102, and when the limiting member 303 touches the first end or the second end, it is stopped from rotating, thereby realizing the switching between the first position and the second position.

[0033] Furthermore, refer to Figure 3 and Figure 4 An inwardly extending mounting frame 330 is formed by the edge of the first air duct opening 301. Multiple guide plates 340 are rotatably connected within the mounting frame 330. The guide plates 340 can close and open the first air duct opening 301. In this example, the first air duct opening 301 can also be closed using the guide plates 340. Furthermore, the guide plates 340 can guide the airflow, preventing turbulence.

[0034] Furthermore, refer to Figure 4 and Figure 5The top plate 110 or the bottom plate 120 has an actuating groove on its inner side, preferably the bottom plate 120. Each guide plate 340 is provided with a push rod 341 extending into the actuating groove. The actuating groove includes an opening section 103, a closing section 104, and a transition section 105. The transition section 105 connects the opening section 103 and the closing section 104. The opening section 103 is used to push the guide plate 340 to rotate and open the first air duct opening 301, and the closing section 104 is used to push the guide plate 340 to close the first air duct opening 301. Specifically, in this embodiment, when the outer casing 300 moves from the first position to the second position, the push rod 341 moves from the opening section 103 to the closing section. When the push rod 341 enters the transition section 105, the track of the transition section 105 pushes the push rod 341, causing the guide plate 340 to gradually rotate and close the first air duct opening 301; conversely, the guide plate 340 opens the air duct opening 301. Therefore, in this embodiment, when the outer casing 300 switches between the first and second positions, the guide plate 340 automatically opens and closes the first air duct opening 301.

[0035] Furthermore, refer to Figure 3 In the first position, the outer casing 300 is in contact with the inner side of the guide plate 340 or the inner port of the mounting frame 330. In this embodiment, when the outer casing 300 is rotated to the second position, the sealing surface 131 can push the guide plate 340 to rotate and close the first air duct opening 301. When it is rotated to the first position, the guide plate 340 can be freely pushed to open or close, so the orientation of each guide plate 340 can be adjusted to direct the airflow to different directions.

[0036] Furthermore, each guide vane 340 is rotatably mounted within the mounting frame 330 around a horizontal axis; a connecting rod assembly connects each guide vane 340, enabling them to move in tandem. A pushing ramp 132 is provided on one side of the support member 130, which pushes the connecting rod assembly to close the first air duct opening 301. Specifically, in this embodiment, when the outer casing 300 rotates to the second position, the connecting rod assembly contacts and is pushed by the pushing ramp 132, which then pushes each guide vane 340 to rotate and close the first air duct opening 301.

[0037] In another embodiment, an electric component can be used instead of the extrusion ramp. The electric component is connected to the linkage assembly, and the electric component drives the linkage assembly to reciprocate, causing each guide plate 340 to swing up and down, and to open and close the first air duct 301.

[0038] Furthermore, referring to Figure 2 When the first air duct opening 301 is located at the air outlet 201, the opening of the mounting frame 330 fits with the sealing ring 202, achieving the effect of sealing the airflow, so that the airflow can be completely blown out from the first air duct opening 301.

[0039] Furthermore, refer to Figure 1 and Figure 2 The top side of the cylindrical shell 300 is provided with an air inlet 304, and the air inlet 304 is provided with a mesh plate 305. A filter screen is detachably installed inside the mesh plate 305. In this embodiment, when using the warm air mode, the filter screen can be installed inside the mesh plate 305 to filter the airflow and prevent dust and other particles in the airflow from being adsorbed onto the electric heating mesh 400. When using the cold air mode, the filter screen can be removed to prevent it from obstructing the airflow.

[0040] Furthermore, refer to Figure 2 A rotating seat 140 is provided on the bottom side of the cylindrical shell 100, and a rotating drive component is provided inside the rotating seat 140. The rotating drive component drives the cylindrical shell 100 to rotate, thereby achieving a wider air supply range.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A switchable bladeless fan structure for warm air, characterized in that, It includes a cylindrical shell, a turbofan fan, an outer shell, and an electric heating grid; the cylindrical shell includes a top plate, a bottom plate, and a supporting member disposed between the top plate and the bottom plate; a cavity is formed between the top plate and the bottom plate, the turbofan fan is disposed in the cavity, and the turbofan fan has an air outlet facing one side of the cylindrical shell; The outer shell is rotatably connected between the top plate and the bottom plate, forming a closed cavity. The supporting member and the cavity are enclosed within the cavity, and the outer side of the supporting member has a sealing surface. The outer shell is provided with a first air duct and a second air duct. The electric heating mesh is disposed inside the second air duct, and a mesh plate covers the outer side of the second air duct. The outer shell includes a first position and a second position. In the first position, the electric heating mesh covers the air outlet, and the sealing surface blocks the first air duct. In the second position, the first air duct is located at the opening of the air outlet.

2. The switchable bladeless fan structure for warm air according to claim 1, characterized in that: The edge of the second air duct extends inward into a frame, and the electric heating grid is disposed within the frame.

3. The switchable bladeless fan structure for warm air according to claim 1, characterized in that: The top plate and / or the bottom plate are provided with a track groove on their inner side, the track groove having a first end and a second end; the outer shell is provided with a limiting member extending into the track groove, the first end and the second end blocking the limiting member.

4. The switchable bladeless fan structure for warm air according to any one of claims 1 to 3, characterized in that: An inwardly extending mounting frame is provided at the edge of the first air duct opening, and multiple guide plates are rotatably connected within the mounting frame. The guide plates can close and open the first air duct opening.

5. The switchable bladeless fan structure for warm air according to claim 4, characterized in that: The top plate or the bottom plate is provided with an actuating groove on its inner side, and each of the guide plates is provided with a push rod extending into the actuating groove; the actuating groove includes an opening section, a closing section and a transition section; the transition section connects the opening section and the closing section, the opening section is used to push the guide plate to rotate and open the first air duct opening, and the closing section is used to push the guide plate to close the first air duct opening.

6. The switchable bladeless fan structure for warm air according to claim 5, characterized in that: The outer casing is in the first position, and the sealing surface is in contact with the inner side of the guide plate or with the inner port of the mounting frame.

7. The switchable bladeless fan structure for warm air according to claim 4, characterized in that: Each of the guide vanes is rotatably disposed within the mounting frame about a horizontal axis; a connecting rod assembly connects each of the guide vanes, enabling them to move in tandem; a pushing slope is provided on one side of the support member, the pushing slope being used to push the connecting rod assembly, causing each of the guide vanes to close the first air duct opening.

8. The switchable bladeless fan structure for warm air according to claim 4, characterized in that: Each of the aforementioned guide vanes is rotatably disposed within the mounting frame about a horizontal axis; a linkage assembly connects each of the aforementioned guide vanes, enabling them to move in tandem; the linkage assembly is connected to an electric component, which drives the linkage assembly to reciprocate, causing each of the aforementioned guide vanes to swing up and down.

9. The switchable bladeless fan structure for warm air according to claim 1, characterized in that: The top side of the cylindrical shell is provided with an air inlet, the air inlet is provided with a mesh plate, and a filter screen is detachably installed inside the mesh plate.

10. The switchable bladeless fan structure for warm air according to claim 1, characterized in that: A rotating seat is provided on the bottom side of the cylindrical shell, and a rotating drive component is provided inside the rotating seat, which drives the cylindrical shell to rotate.

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