Desktop fan heater

Abstract

The utility model relates to a desktop warm air blower which comprises a barrel-shaped machine shell, a fan assembly, a heating assembly, an air inlet net and an air outlet net, the fan assembly and the heating assembly are fixed inside the machine shell, the air inlet net and the air outlet net are arranged at the rear end and the front end of the machine shell respectively, and the periphery of the outer side of the air outlet net extends outwards to form an annular protrusion to form a cavity. The air guide piece is positioned in the cavity and is rotatably connected with the center of the air outlet net by virtue of a central shaft of the air guide piece; the air guide piece comprises a center wheel and a plurality of air guide blades evenly extending from the center wheel to the periphery, an air guide groove is formed between every two adjacent air guide blades, and all the air guide blades are gradually twisted in the same direction from the root to the tail end. After heating, axial air flow of warm air blown out of the air outlet net in the axial direction is changed into trumpet-shaped air flow under the action of the air guide piece, the trumpet-shaped air flow is gradually diffused around, the coverage area of the warm air is increased, and the blown warm air is softer and more natural.

Description

Technical Field

[0001] The utility model relates to a heating device, in particular to a small-sized warm air device for a desktop. Background Art

[0002] With the advancement of society and the advancement of science and technology, people's requirements for living environments are gradually increasing. Fan heaters, as a widely used household appliance, can bring warmth to people during cold winters. In existing technology, small fan heaters are equipped with an axial flow fan assembly, with the fan assembly and heating element enclosed in a single housing. During operation, natural air is drawn in through the air inlet louver at the axial rear end of the housing, and the heated air is blown out through the air outlet louver at the front end. This axially blown hot air needs to be effectively dispersed around the area. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to propose a desktop heater that can better diffuse hot air to the surrounding area in response to the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A desktop air heater is provided, comprising a cylindrical casing, a fan assembly, a heating assembly, an air inlet net and an air outlet net, wherein the fan assembly and the heating assembly are fixed inside the casing, and the air inlet net and the air outlet net are respectively arranged at the rear end and the front end of the casing; in addition, an air guide member is also included, wherein the outer periphery of the air outlet net is extended outward with an annular protrusion to form a cavity; the air guide member is located in the cavity and is rotatably connected to the center of the air outlet net by means of its central axis; the air guide member comprises a central wheel and a plurality of air guide blades extending uniformly from the central wheel to the periphery, an air guide groove is formed between adjacent air guide blades, and each air guide blade is gradually twisted in the same direction from the root to the tail end.

[0006] Further:

[0007] Each air guide blade is S-shaped.

[0008] The fan assembly includes a cylindrical fan bracket, a motor and an axial fan blade driven by the motor, and the motor and the axial fan blade are fixed in the fan bracket; the heating assembly includes a cylindrical heating element bracket and a heating wire fixed therein, and the front end of the fan bracket and the rear end of the heating element bracket are fixed to form a fan heating shell.

[0009] It also includes a circuit board, which is arranged between the fan heating component shell and the casing.

[0010] The fan heating shell is fixed to the casing by means of buckles and screws.

[0011] The air outlet net is fixed to the fan heating shell.

[0012] The utility model also comprises a bracket, which is hinged to two sides of the peripheral wall of the housing.

[0013] The utility model installs an air guide piece on the front side of the air outlet net, and each heat-conducting blade of the air guide piece radiates outward from the central wheel, and each heat-conducting blade and the air guide blade are gradually twisted in the same direction from the root to the tail end. After being heated by the heating component, the warm air blown out axially from the air outlet net is changed into a trumpet-shaped wind flow under the action of the air guide piece, and gradually diffused to the surroundings. Compared with the existing technology, the coverage area of the warm air is increased, and the warm air blown out is softer and more natural. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an axonometric projection diagram of an embodiment of the desktop fan heater of the present invention;

[0015] Figure 2 This is a schematic diagram of the decomposition of the desktop heater embodiment of the utility model Figure 1 ;

[0016] Figure 3 This is a schematic diagram of the decomposition of the desktop heater embodiment of the utility model Figure 2 ;

[0017] Figure 4 This is a schematic diagram of the decomposition of the desktop heater embodiment of the utility model Figure 3 ;

[0018] Figure 5 It is a three-dimensional schematic diagram showing the outer side of the air guide;

[0019] Figure 6 This is a schematic diagram of the rotation direction of the air guide member of the desktop heater embodiment of the present invention;

[0020] Figure 7 yes Figure 6 AA cross-sectional diagram;

[0021] Figure 8 yes Figure 6 BB cross-sectional diagram;

[0022] Figure 9 This is a cross-sectional schematic diagram of an embodiment of the desktop air heater of the present utility model;

[0023] Figure 10 It is a three-dimensional schematic diagram showing the inner side of the air guide;

[0024] Figure 11 It is a three-dimensional schematic diagram of the air outlet network of the desktop air heater embodiment of the present invention. DETAILED DESCRIPTION

[0025] Now, in conjunction with the accompanying drawings, the preferred embodiments of the present utility model will be described in detail.

[0026] A desktop heater, such as Figures 1 to 11 As shown, it includes a cylindrical casing 10, a bracket 20, a fan assembly 30, a heating assembly 40, an air inlet net 50, an air outlet net 60, an air guide 70 and a circuit board 80. The fan assembly 30 and the heating assembly 40 are fixed inside the casing 10, and the air inlet net 50 and the air outlet net 60 are respectively arranged at the rear end and the front end of the casing 10. The fan assembly 30 includes a cylindrical fan bracket 31, a motor 32 and an axial flow fan blade 33 driven by the motor 32, and the motor 32 and the axial flow fan blade 33 are fixed in the fan bracket 31. The heating assembly 40 includes a cylindrical heating element bracket 41 and a heating wire 42 fixed therein. The outer periphery of the air outlet net 60 extends outwardly with an annular protrusion 61 to form a cavity. The air guide 70 is located in the cavity and is rotatably connected to the center of the air outlet net 60 by means of its central axis 71. The bracket 20 and the casing 10 are hinged on both sides of the peripheral wall.

[0027] like Figures 5 to 8 As shown, the air guide 70 includes a center wheel 72 and a plurality of air guide blades 73 extending uniformly from the center wheel 72 to the periphery. Each air guide blade 73 may be S-shaped, with air guide grooves 74 formed between adjacent air guide blades. Each air guide blade 73 is gradually twisted in the same direction from the root to the tail end, that is, the twisting angle gradually increases from the inside to the outside, and the maximum twisting angle is generally less than 45 degrees. The twisting angle of the air guide blade is the smallest near the root and the largest at the tail end. For example, Figure 7 As shown, the torsion angle near the root is only 5 degrees, as shown in Figure 8 As shown in the figure, the twist angle increases to 32 degrees near the tail end. The twist angle of the air guide blade gradually increases from the root to the tail end. In this way, the air guide grooves diverge from the center outward, gradually directing the central axial airflow to the surrounding areas.

[0028] like Figures 2 to 4 、 Figure 9 As shown, the front end of the fan bracket 31 and the rear end of the heating element bracket 41 are fixed to form a fan heating housing 90, and the circuit board 80 is arranged between the fan heating housing 90 and the housing 10. During installation, the fan heating assembly can be fixed to the housing 10 by means of buckles and screws, and the air outlet net 60 is fixed to the fan heating housing.

[0029] When working, Figure 9 As shown, the motor 32 drives the axial flow fan blades 33 to rotate, and the air is sucked into the fan heating housing from the air inlet net 50, and is heated by the heating wire 41. The heated warm air passes axially through the air outlet net 60, blowing the air guide to rotate in the direction opposite to the twisting direction (see Figure 6(The arrow indicates the direction of rotation.) The gradually twisting and smoothly rotating air guide blades transform the central axial airflow into a trumpet-shaped airflow that gradually diffuses in all directions. Compared with existing technologies, this increases the coverage area of the warm air and produces a softer and more natural warm air.

[0030] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and these modifications and replacements should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A desktop air heater, comprising a cylindrical housing, a fan assembly, a heating assembly, an air inlet net, and an air outlet net, wherein the fan assembly and the heating assembly are fixed inside the housing, and the air inlet net and the air outlet net are respectively arranged at the rear end and the front end of the housing, characterized in that: It also includes an air guide member, and a circular protrusion extends outward from the outer periphery of the air outlet net to form a cavity; the air guide member is located in the cavity and is rotatably connected to the center of the air outlet net by means of its central axis; the air guide member includes a central wheel and a plurality of air guide blades extending evenly from the central wheel to the surrounding area, and an air guide groove is formed between adjacent air guide blades, and each air guide blade is gradually twisted in the same direction from the root to the tail end.

2. The desktop heater according to claim 1, characterized in that: Each air guide blade is S-shaped.

3. The desktop heater according to claim 1, characterized in that: The fan assembly includes a cylindrical fan bracket, a motor and an axial fan blade driven by the motor, and the motor and the axial fan blade are fixed in the fan bracket; the heating assembly includes a cylindrical heating element bracket and a heating wire fixed therein, and the front end of the fan bracket and the rear end of the heating element bracket are fixed to form a fan heating shell.

4. The desktop heater according to claim 2, characterized in that: It also includes a circuit board, which is arranged between the fan heating component shell and the casing.

5. The desktop heater according to claim 2, characterized in that: The fan heating shell is fixed to the casing by means of buckles and screws.

6. The desktop heater according to claim 2, characterized in that: The air outlet net is fixed to the fan heating component.

7. The desktop heater according to claim 1, characterized in that: The utility model also comprises a bracket, which is hinged to two sides of the peripheral wall of the housing.

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