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 comprises an upper shell and a handle; the motor and the impeller are arranged in the upper shell; the circuit board is arranged in the handle; an air guide opening is formed in the connecting position of the upper shell and the handle, the upper shell is communicated with an inner cavity of the handle through the air guide opening, and the air guide opening is suitable for guiding part of airflow in the upper shell to the inner cavity of the handle. According to the air guide opening, when the turbofan works, part of air flow penetrating through the upper shell can be guided into the inner cavity of the handle, heat dissipation is conducted on electronic devices in the handle, and the internal temperature is prevented from being too high.

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 wind-blowing device whose blades rotate at high speed driven by a motor, generating strong wind force. It can be widely used in dust removal, snow blowing, etc. The internal circuit of the turbo fan needs to provide a large current to ensure the high-speed rotation of the motor, but the increase in current will cause increased internal heat, and in severe cases even damage the internal structure of the fan.

[0003] In addition, when a user touches a turbo fan, the static electricity on the human body may cause static discharge, thereby damaging the electronic components of the fan. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art, thereby providing a turbo fan.

[0005] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0006] The turbo fan provided by the utility model comprises: a shell, the shell comprising an upper shell and a handle; a motor and an impeller, the motor and the impeller being arranged in the upper shell; a circuit board, which is arranged in the handle; an air guide port is provided at the connection between the upper shell and the handle, the air guide port connects the upper shell and the inner cavity of the handle, and the air guide port is suitable for guiding part of the airflow in the upper shell to the inner cavity of the handle.

[0007] Optionally, in the turbofan provided by the present invention, the upper shell is placed horizontally on the top end of the handle; a wind tube is provided in the upper shell, a supporting structure is provided in the wind tube, and the supporting structure coaxially supports the motor and the impeller.

[0008] Optionally, in the turbofan provided by the present invention, the air guide port includes a first opening and a second opening, the first opening is located on the wind cylinder, the second opening is located on the upper shell, and the first opening and the second opening are connected to each other.

[0009] Optionally, in the turbofan provided by the present invention, the circuit board is arranged at the outlet of the air guide port.

[0010] Optionally, the turbofan provided by the utility model further includes a battery, wherein the battery is disposed in the handle, and the battery and the circuit board are both disposed perpendicular to the upper housing.

[0011] Optionally, in the turbo fan provided by the present invention, the handle comprises a bottom shell and an upper cover which are buckled with each other, a gap is provided at the buckled portion of the bottom shell and the upper cover; and the circuit board is arranged facing the gap.

[0012] Optionally, in the turbo fan provided by the utility model, the handle further includes an electrostatic protection plate, and the electrostatic protection plate is an electrical insulating plate, which is arranged between the circuit board and the gap.

[0013] Optionally, in the turbofan provided by the utility model, the static electricity protection plate is an epoxy resin plate.

[0014] Optionally, in the turbo fan provided by the present invention, the electrostatic protection plate is adhered to the circuit board through an adhesive layer.

[0015] Optionally, in the turbo fan provided by the present invention, the adhesive layer is a thermally conductive silicone pad.

[0016] The technical solution of the utility model has the following advantages:

[0017] 1. The turbofan provided by the utility model has an air guide port at the connection between the upper shell and the handle, which can guide a part of the airflow passing through the upper shell into the inner cavity of the handle when the turbofan is working, so as to dissipate the heat of the electronic components in the handle and prevent the internal temperature from being too high.

[0018] 2. The turbo fan provided by the utility model has an electrical insulation plate for static protection between the gap between the bottom shell and the cover of the handle and the circuit board, which can prevent the damage to the circuit board caused by static electricity carried by the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 The turbofan structure provided in the embodiment of the utility model Figure 1 ;

[0021] Figure 2 The turbofan structure provided in the embodiment of the utility model Figure 2 ;

[0022] 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;

[0023] Figure 4 The internal structure of the turbo fan provided in the embodiment of the utility model Figure 1 ;

[0024] Figure 5 The internal structure of the turbo fan provided in the embodiment of the utility model Figure 2 ;

[0025] Figure 6 This is a structural diagram of an integrally formed upper cover and bottom shell provided in an embodiment of the utility model;

[0026] Figure 7 A front structural diagram of a turbo fan provided in an embodiment of the utility model;

[0027] Figure 8 The internal structure of the turbo fan provided in the embodiment of the utility model Figure 3 ;

[0028] Fig. 9 A diagram showing the coordination structure of the electrostatic protection plate and the circuit board provided in the embodiment of the utility model;

[0029] Fig.10 This is a structural diagram of the wind tube provided in the embodiment of the utility model;

[0030] Fig.11 The fixing structure of the motor and the impeller in the wind tube provided in the embodiment of the utility model Figure 1 ;

[0031] Fig.12 The fixing structure of the motor and the impeller in the wind tube provided in the embodiment of the utility model Figure 2 ;

[0032] Fig.13 This is a structural diagram of a third cylinder provided in an embodiment of the utility model;

[0033] Fig.14 This is a structural diagram of the first cylinder provided in an embodiment of the utility model.

[0034] Description of reference numerals:

[0035] 1-shell, 11-handle, 111-bottom shell, 112-upper cover, 113-lighting device, 114-screen, 115a-first button, 115b-second button, 117-power switch, 118-charging port, 119-gap, 12-upper shell, 121-second opening;

[0036] A-grip area, T-air guide, S-exit;

[0037] 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;

[0038] 4-motor; 40-battery;

[0039] 5- impeller, 51- blades;

[0040] 6-first circuit board, 61-negative electrode, 62-MOS tube,

[0041] 7-conductive structure, 71-embedded body, 72-conducting wire;

[0042] 81- second circuit board, 82- third circuit board;

[0043] 9-static protection plate, 91-adhesive layer. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Example 1

[0048] 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 1Only 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.

[0049] Specifically, Figure 2-5 As shown, it also includes an illumination device 113, which is arranged at the handle 11 position 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 illumination 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. Figure 7 As shown, there is inevitably a certain gap 119 at the fastening point between the bottom shell 111 and the upper cover 112; on the upper cover 112, there is also a display screen 114 and two operation buttons, and 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.

[0050] As an alternative, Figure 1-5 and Fig.10 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.

[0051] like Fig.11 and Fig.12 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.13As 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.14 As shown, at the air outlet end 311 of the first cylinder 31, there is an air outlet grille.

[0052] like Figure 3 and Figure 8 As 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 arranged in a long strip along the length direction of the handle, that is, it is arranged perpendicular to the upper shell. Optionally, the capacity range of the battery is 2000maH*8-2200maH*8, and the battery 40 can work in a discharge current range of 0A-60A. The second button 115b for adjusting the wind force can control the battery to discharge in 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. The second circuit 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.

[0053] As an alternative, Figure 5-8As 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 are connected to each other, and together constitute an air guide port T, and the above-mentioned first circuit board 6 is vertically arranged at the outlet S of the air guide port T, and the above-mentioned arrangement method makes the first circuit board 6 face the gap. 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 be used as a lead hole, and the power cord of the motor 4 can be introduced from the upper shell 12 into the inner cavity of the handle 11 to connect with the first circuit and the battery.

[0054] like Figure 8-9 As shown, the handle also includes an electrostatic protection plate 9, which is an electrical insulation plate, which is arranged between the first circuit board 6 and the gap 119. The turbofan provided in this embodiment is provided with an electrical insulation plate for electrostatic protection between the gap between the bottom shell and the cover of the handle and the circuit board, which can avoid damage to the circuit board caused by static electricity carried by the human body. As a preferred embodiment, the electrostatic protection plate 9 can be an epoxy resin plate, which is adhered to the first circuit board 6 through an adhesive layer 91, and the adhesive layer 91 is preferably a thermally conductive silicone pad, which can cover the area where the MOS tube 62 of the first circuit board 6 is located.

[0055] 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 3-5 As 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.

[0056] 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.

[0057] As an alternative implementation, the conductive structure 7 may also be electrically connected to other components of the circuit board.

[0058] As a preferred embodiment, the turbofan provided in this embodiment has two conductive structures 7, the wires of the two conductive structures 7 are both connected to the negative pole 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, and 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 outwardly. 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.

[0059] 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.

[0060] 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, the housing comprising an upper housing and a handle; a motor and an impeller, wherein the motor and the impeller are arranged in the upper housing; a circuit board disposed in the handle; An air guide port is provided at the connection between the upper shell and the handle, the air guide port connects the inner cavity of the upper shell and the handle, and the air guide port is suitable for guiding part of the airflow in the upper shell to the inner cavity of the handle.

2. The turbofan according to claim 1, characterized in that: The upper shell is placed horizontally on the top of the handle; a wind tube is arranged inside the upper shell, and a supporting structure is arranged inside the wind tube, and the supporting structure coaxially supports the motor and the impeller.

3. The turbo fan according to claim 2, characterized in that: The air guide port includes a first opening and a second opening, the first opening is located on the air cylinder, the second opening is located on the upper shell, and the first opening and the second opening are connected to each other.

4. The turbofan according to claim 2 or 3, characterized in that: The circuit board is arranged at the outlet of the air guide port.

5. The turbo fan according to claim 4, characterized in that: It also includes a battery, which is arranged in the handle, and the battery and the circuit board are both arranged perpendicular to the upper shell.

6. The turbo fan according to claim 5, characterized in that: The handle comprises a bottom shell and an upper cover which are buckled with each other, and a gap is formed at the buckling position of the bottom shell and the upper cover; the circuit board is arranged facing the gap.

7. The turbo fan according to claim 6, characterized in that: The handle also includes an electrostatic protection plate, which is an electrical insulation plate and is arranged between the circuit board and the gap.

8. The turbo fan according to claim 7, characterized in that: The static protection plate is an epoxy resin plate.

9. The turbofan according to claim 8, characterized in that: The static electricity protection plate is adhered to the circuit board through an adhesive layer.

10. The turbofan according to claim 9, characterized in that: The adhesive layer is a thermally conductive silicone pad.

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