Turbofan

Abstract

The utility model relates to the technical field of fans, in particular to a turbofan. The device comprises a shell, and the shell is provided with a holding area; the motor and the impeller are arranged in the shell; the circuit board is arranged in the shell, and the circuit board is electrically connected with the motor; one end of the conductive structure is connected with the circuit board, and the other end of the conductive structure is exposed out of the holding area. A user holds the holding area with a hand to carry out air blowing operation, and at the moment, the hand of the user makes contact with the exposed part of the conductive structure; in the blowing operation process, electrostatic charges generated by high-speed rotation of the impeller can be transferred to the circuit board electrically connected with the motor and then transferred to the human body in real time through the conductive structure, and electrostatic discharge generated due to too high electrostatic accumulation can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a turbo fan. Background Art

[0002] A handheld turbo fan is a small portable blowing device, whose blades rotate at high speed driven by a motor to generate strong wind, and can be widely used in scenes such as dust removal and snow blowing. However, in some specific environments (such as dry or dusty), due to the high speed of the blades, static electricity will be generated and accumulated inside the fan, resulting in electrostatic discharge (ESD), causing damage to the internal circuit structure. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the turbofan is easily damaged by electrostatic discharge, thereby providing a turbofan.

[0004] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0005] The utility model provides a turbo fan, which comprises: a shell having a gripping area; a motor and an impeller, which are arranged in the shell; a circuit board, which is arranged in the shell, and the circuit board is electrically connected to the motor; and a conductive structure, one end of which is connected to the circuit board, and the other end of which is exposed outwardly from the gripping area.

[0006] Optionally, in the turbofan provided by the present invention, the housing comprises an upper housing and a handle; the motor and the impeller are arranged in the upper housing, and the gripping area is a part of the handle.

[0007] Optionally, in the turbofan provided by the present invention, the circuit board is arranged in the handle.

[0008] Optionally, in the turbofan provided by the present invention, the conductive structure includes a wire and an embedded body; the wire is electrically connected to the circuit board and the embedded body respectively; and the embedded body is exposed to the outside through the shell of the gripping area.

[0009] Optionally, in the turbofan provided by the present invention, the conductive structure is connected to the negative pole of the circuit board.

[0010] Optionally, in the turbofan provided by the present invention, the handle comprises a bottom shell and an upper cover; the conductive structure has two, and the two embedded bodies of the conductive structure respectively pass through the bottom shell and the upper cover to be exposed outward.

[0011] Optionally, the turbofan provided by the utility model further includes a wind cylinder, which is arranged in the upper shell; a supporting structure is provided in the wind cylinder, and the supporting structure coaxially supports the motor and the impeller.

[0012] Optionally, in the turbofan provided by the present invention, the wind tube has an air inlet end and an air outlet end, and the air inlet end and the air outlet end are respectively arranged on both sides of the shell; the embedded body exposed outwardly is located on the same side of the shell as the air inlet end.

[0013] Optionally, the turbofan provided by the present invention further includes a lighting device, which is arranged at the lower edge of the upper shell and is located on the same side of the shell as the air outlet end.

[0014] Optionally, in the turbofan provided by the present invention, the air inlet end has an air inlet grid, and the inner diameter of the air cylinder outside the air inlet grid gradually decreases from the outside to the inside.

[0015] The technical solution of the utility model has the following advantages:

[0016] The turbo fan provided by the utility model has one end of its conductive structure connected to the circuit board, and the other end of the conductive structure is exposed outwardly from the holding area; when in use, the user holds the holding area to perform a blowing operation, and at this time, the user's hand contacts the portion of the conductive structure exposed outwardly; during the blowing operation, the static charge generated by the high-speed rotation of the impeller will be transferred to the circuit board electrically connected to the motor, and then transferred to the human body in real time via the conductive structure, thereby avoiding excessive accumulation of static electricity and generating static electricity discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The turbofan structure provided in the embodiment of the utility model Figure 1 ;

[0019] Figure 2 The turbofan structure provided in the embodiment of the utility model Figure 2 ;

[0020] Figure 3 This is a diagram of the internal structure of the turbo fan provided in the embodiment of the utility model after the upper cover is opened;

[0021] Figure 4The internal structure of the turbo fan provided in the embodiment of the utility model Figure 1 ;

[0022] Figure 5 The internal structure of the turbo fan provided in the embodiment of the utility model Figure 2 ;

[0023] Figure 6 This is a structural diagram of an integrally formed upper cover and bottom shell provided in an embodiment of the utility model;

[0024] Figure 7 This is a structural diagram of the wind tube provided in the embodiment of the utility model;

[0025] Figure 8 The fixing structure of the motor and the impeller in the wind tube provided in the embodiment of the utility model Figure 1 ;

[0026] Fig. 9 The fixing structure of the motor and the impeller in the wind tube provided in the embodiment of the utility model Figure 2 ;

[0027] Fig.10 This is a structural diagram of a third cylinder provided in an embodiment of the utility model;

[0028] Fig.11 This is a structural diagram of the first cylinder provided in an embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 1-housing, 11-handle, 111-bottom housing, 112-upper cover, 113-illumination device, 114-screen, 115a-first button, 115b-second button, 117-power switch, 118-charging port, 12-upper housing, 121-second opening;

[0031] A-grip area, T-air duct;

[0032] 3-wind cylinder, 31-first cylinder, 311-air outlet, 312-first opening, 313-air outlet grid, 32-second cylinder, 321-support structure, 33-third cylinder, 331-air inlet, 332-arc-shaped inclined surface, 333-air inlet grid;

[0033] 4-motor; 40-battery;

[0034] 5- impeller, 51- blades;

[0035] 6-first circuit board, 61-negative electrode, 62-MOS tube,

[0036] 7-conductive structure, 71-embedded body, 72-conducting wire;

[0037] 81 - second circuit board, 82 - third circuit board. DETAILED DESCRIPTION

[0038] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Example 1

[0042] This embodiment provides a turbofan, which includes a housing 1, and optionally, Figure 1 and Figure 2 As shown, the housing 1 includes an upper housing 12 and a handle 11, and the handle 11 has a gripping area A for a user to hold. Figure 1 Only the holding area A is indicated as an example. The bottom of the handle has a charging port 118 and a power switch 117. The upper shell 12 is placed horizontally on the top of the handle 11. The front and rear ends of the upper shell 12 respectively have an air outlet 311 and an air inlet 331. The air inlet 331 and the air outlet 311 are arranged on both sides of the upper shell 12. When in use, the user can hold the holding area A of the handle 11 with one hand, turn on the power switch 117 at the bottom, and perform the blowing operation.

[0043] Specifically, Figure 2 and Figure 4As shown, it also includes a lighting device 113, which is arranged at the position of the handle 11 at the lower edge of the upper shell 12 and is located on the same side of the shell 1 as the air outlet end 311. The lighting device 113 can face the blowing object together with the air outlet end. The handle 11 includes a bottom shell 111 and an upper cover 112 that are interlocked. The upper cover 112 also has a display screen 114 and two operation buttons. The display screen 114 can display the operating status of the turbo fan and / or the lighting device 113; the two operation buttons are respectively a first button 115a and a second button 115b, which can respectively adjust the opening and closing of the lighting device and the wind force.

[0044] As an alternative, Figure 1-5 and Figure 7 As shown, the turbofan provided in this embodiment includes a wind tube 3, and the wind tube 3 is embedded in the upper housing 12. The wind tube includes a first cylinder 31, a second cylinder 32 and a third cylinder 33, and the first cylinder 31, the second cylinder 32 and the third cylinder 33 are sequentially arranged from the air outlet end to the air inlet end, wherein the air outlet end 311 is arranged on the first cylinder 31, and the air inlet end 331 is arranged on the third cylinder 33.

[0045] like Figure 8 and Fig. 9 As shown, the turbofan also includes a motor 4 and an impeller 5. Optionally, the motor 4 is a brushless motor with a motor speed range of 1000rpm-55500rpm. The impeller 5 has a plurality of blades 51. The motor 4 and the impeller 5 are coaxially arranged and supported by the support structure 321 in the second cylinder 32, so as to be arranged in the wind tube 3. At the air inlet end of the third cylinder 33, an air inlet grid 333 is also provided. The inner diameter of the wind tube 3 outside the air inlet grid 333 gradually decreases from the outside to the inside; as an optional method, as Fig.10 As shown, there is a circle of arc-shaped inclined surface 332 on the outside of the air inlet grille, which makes the inner diameter of the air cylinder 3 outside the air inlet grille 333 gradually decrease from the outside to the inside, thereby increasing the air volume of the turbo fan. Fig.11 As shown, at the air outlet end 311 of the first cylinder 31, there is an air outlet grille.

[0046] like Figure 3-4As shown, in the handle 11, a battery 40, a first circuit board 6, a second circuit board 81 and a third circuit board 82 are also provided; the battery 40 is in a long strip shape and is arranged along the length direction of the handle. Optionally, the capacity range of the battery is 2000maH*8-2200maH*8, and the battery 40 can operate within a discharge current range of 0A-60A. The second button 115b for adjusting the wind force can control the battery to discharge within a range of 20%, 40%, 70%, and 100% of the maximum battery power, thereby adjusting different speeds of the motor; the second circuit board 81 is arranged at the bottom of the battery 40, and the second circuit board 81 has a charging circuit for charging the battery, and the second circuit The board 81 is respectively connected to the charging port 118, the power switch 117 and the battery 40; the first circuit board 6 is arranged on one side of the battery 40, and is respectively electrically connected to the motor 4 and the battery 40, and the first circuit board 6 has a control circuit and an electronic device with adjustable current such as a MOS tube 62; the lighting device 113 is also installed on the first circuit board 6, specifically, the lighting device 113 includes an LED lamp bead arranged on the first circuit board 6, and a light-transmitting cover arranged outside the LED lamp bead and respectively engaged with the bottom shell and the upper cover; the third circuit board 82 is arranged at the top position of the battery 40, and is respectively connected to the display screen 114, the first button 115a and the second button 115b.

[0047] As an alternative, Figure 5-7 As shown, the upper shell 12 and the bottom shell 111 can be an integrally formed part; below the upper shell, there is a second opening 121 facing the bottom shell 111; below the first cylinder 31, there is a first opening 312 facing the bottom shell 111; the first opening 312 and the second opening 121 together constitute an air guide port T, and the above-mentioned first circuit board 6 is vertically arranged near the air guide port T. The air guide port T connects the inner cavity of the upper shell and the handle. During the operation of the turbofan, the air guide port can guide part of the airflow generated by the rotation of the impeller in the upper shell to the inner cavity of the handle, which can dissipate heat for the first circuit board 6, or it can also dissipate heat for the battery 40. Furthermore, the air guide port T can also serve as a lead hole, which can introduce the power cord of the motor 4 from the upper shell 12 into the inner cavity of the handle 11 to connect with the first circuit and the battery.

[0048] During the operation of the turbofan provided in this embodiment, the high-speed rotation of the impeller 5 easily generates and accumulates static electricity inside the fan. The static electricity is transmitted through the motor 4 and concentrated on the first circuit board 6 electrically connected to the motor. The accumulation of static electricity on the first circuit board 6 will generate static electricity discharge, thereby causing damage to the internal circuit structure. In order to solve the above problem, Figure 3-5As shown, the turbofan provided in this embodiment is further provided with a conductive structure 7, wherein the conductive structure 7 includes a wire 72 and an embedded body 71. The wire 72 may be an ordinary copper wire or other electric wire, and the embedded body 71 may be a conductor such as a screw that can be embedded in the shell and exposed to the outside. The embedded body 71 is located in the holding area A, that is, it can be ensured that the embedded body 71 can always be in contact with the human hand during use, thereby achieving discharge; one end of the wire 72 is preferably connected to the negative electrode 61 of the circuit board, because when all components on the circuit board are in normal working condition, the negative electrode is the only common terminal, so the best way is to connect the negative electrode for discharge.

[0049] The turbo fan provided in this embodiment has one end of its conductive structure connected to the circuit board, and the other end of the conductive structure is exposed outwardly from the holding area; when in use, the user holds the holding area to perform a blowing operation, at which time the user's hand touches the exposed portion of the conductive structure; during the blowing operation, the static charge generated by the high-speed rotation of the impeller will be transferred to the circuit board electrically connected to the motor, and then transferred to the human body in real time via the conductive structure, thereby avoiding excessive accumulation of static electricity and generating static electricity discharge.

[0050] As an alternative implementation, the conductive structure 7 may also be electrically connected to other components of the circuit board.

[0051] As a preferred embodiment, the turbofan provided in this embodiment has two conductive structures 7, and the wires of the two conductive structures 7 are both connected to the negative electrode 61 of the circuit board, and extend from the upper and lower parts of the battery 40 to the position of the embedded body 71 respectively. The embedded bodies 71 of the two conductive structures 7 respectively pass through the bottom shell 111 and the upper cover 112 to be exposed outward, that is, one of the embedded bodies passes through the bottom shell 111, and the other embedded body passes through the upper cover 112 to be exposed outward. The method of providing conductive structures on both the bottom shell and the upper cover of the handle can increase redundant design and increase the stability of static electricity extraction.

[0052] As a preferred method, Figure 1 As shown, in the turbo fan provided in this embodiment, the embedded body 71 exposed outwardly and the air inlet end 331 are located on the same side of the shell, so that it can be ensured that the embedded body 71 exposed outwardly can always be in contact with the user's palm.

[0053] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A turbo fan, characterized in that: include: A housing having a gripping area; a motor and an impeller disposed within the housing; A circuit board is disposed in the housing, and the circuit board is electrically connected to the motor; A conductive structure, one end of which is connected to the circuit board, and the other end of which is exposed outward from the holding area.

2. The turbofan according to claim 1, characterized in that: The housing comprises an upper housing and a handle; The motor and the impeller are arranged in the upper housing, and the gripping area is a part of the handle.

3. The turbofan according to claim 2, characterized in that: The circuit board is arranged in the handle.

4. The turbofan according to claim 2 or 3, characterized in that: The conductive structure includes a wire and an embedded body; the wire is electrically connected to the circuit board and the embedded body respectively; the embedded body passes through the shell of the holding area and is exposed to the outside.

5. The turbo fan according to claim 4, characterized in that: The conductive structure is connected to the negative pole of the circuit board.

6. The turbo fan according to claim 4, characterized in that: The handle comprises a bottom shell and an upper cover; the conductive structures are provided with two, and the embedded bodies of the two conductive structures respectively penetrate the bottom shell and the upper cover to be exposed outwards.

7. The turbo fan according to claim 4, characterized in that: It also includes a wind tube, which is arranged in the upper shell; a supporting structure is provided in the wind tube, and the supporting structure coaxially supports the motor and the impeller.

8. The turbo fan according to claim 7, characterized in that: The air duct has an air inlet end and an air outlet end, and the air inlet end and the air outlet end are arranged on both sides of the shell; the embedded body exposed outwards is located on the same side of the shell as the air inlet end.

9. The turbofan according to claim 8, characterized in that: It also includes a lighting device, which is arranged on the lower edge of the upper shell and is located on the same side of the shell as the air outlet.

10. The turbo fan according to claim 8, characterized in that: The air inlet end is provided with an air inlet grid, and the inner diameter of the air cylinder outside the air inlet grid gradually decreases from the outside to the inside.

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