Double-motor mute fan

Abstract

The invention discloses a double-motor silent fan which comprises an outer shell, an inner shell and a fan, one end of the outer shell is an air inlet end and is provided with an air inlet, and the other end of the outer shell is an air outlet end and is provided with an air outlet; a circuit cavity, a motor cavity and an air duct cavity are sequentially formed in the outer shell in the direction from the air inlet end to the air outlet end. Two groups of driving motors are arranged in the motor cavity; a control unit for controlling the driving motor is formed in the circuit cavity; a sound absorption layer used for achieving sound absorption and noise reduction effects is tightly attached to the inner wall of the outer shell. A double-motor fan structure is adopted, so that the motor has the characteristics of small size, small volume, light weight and high wind speed during operation, and the use experience of customers can be improved; and a sound absorption structure is arranged in the fan, so that the effect of absorbing working noise when the double-motor structure works can be achieved, the use experience of a user is effectively improved, and the use comfort of the fan is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fan structures and relates to a dual-motor silent fan. Background Art

[0002] With the vigorous development of high-speed DC brushless fan motors, the competition in the whole hair dryer industry is becoming increasingly fierce. Correspondingly, there are requirements for large air volume, low noise, and high lifespan for the whole machine. While the quality requirements for high-efficiency fan motors are also getting higher and higher, people's requirements for the product usage experience are also continuously improving - especially for most hair dryer products with noise problems, the noise treatment effect is not good. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0004] A dual-motor silent fan, comprising: an outer housing, one end of the outer housing is an air inlet end, provided with an air inlet, and the other end is an air outlet end, provided with an air outlet;

[0005] Inside the outer housing, a circuit cavity, a motor cavity, and an air duct cavity are sequentially arranged in the direction from the air inlet end to the air outlet end;

[0006] Two groups of driving motors are arranged in the motor cavity; and a control unit for realizing the control of the driving motors is formed in the circuit cavity;

[0007] A sound-absorbing layer for realizing the sound absorption and noise reduction effect is closely attached to the inner wall of the outer housing.

[0008] As a further scheme of the present invention: the driving motor adopts a motor structure with an axial-flow impeller.

[0009] As a further scheme of the present invention: two groups of air flow ducts for realizing air flow guidance are arranged in the air duct cavity, the two groups of air flow ducts correspond to the two groups of driving motors one by one, and the outer diameter of the air flow duct matches the motor air outlet of the driving motor. One end of the air flow duct is connected to the outlet of the driving motor, and the other end is connected to the air outlet.

[0010] As a further scheme of the present invention: a gap is provided between the air flow duct and the air duct cavity.

[0011] As a further scheme of the present invention: the outer housing is formed by buckling an upper housing and a lower housing, and snap-lock pieces are arranged at the positions corresponding to the motor cavity and the air outlet in the upper housing and the lower housing. A semicircular snap groove is formed on the snap-lock piece;

[0012] When the upper housing and the lower housing are buckled, the corresponding snap grooves on the two groups of snap-lock pieces cooperate with each other to form a limit card slot.

[0013] As a further solution of the present invention: in the positions at both ends of the upper shell and the lower shell corresponding to the motor chamber, a set of snap-on lock pieces are provided, which can realize the locking and fixing work at both ends of the driving motor.

[0014] As a further solution of the present invention: installation jacks for installing heating wire mica sheets are provided in the air flow duct.

[0015] As a further solution of the present invention: a sound-absorbing layer is also closely attached to the inner wall position of the air inlet of the outer shell.

[0016] As a further solution of the present invention: the sound-absorbing layer is made of porous sound-absorbing materials, including but not limited to: one of glass wool, mineral wool, expanded perlite, and perforated sound-absorbing boards.

[0017] The beneficial effects of the present invention: adopting a dual-motor fan structure, it has the characteristics of small motor size, small volume, light weight, and high wind speed during operation, which can improve the customer experience; and a sound-absorbing structure is provided inside the fan, which can absorb the working noise when the dual-motor structure works, effectively improving the user experience and the comfort of using the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the present invention.

[0019] Figure 2 It is another schematic structural diagram of the present invention.

[0020] Figure 3 It is a schematic internal structure diagram of the outer shell in the present invention.

[0021] Figure 4 It is a schematic structural diagram of the air flow duct in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. It should be understood that the present application is not limited by the example embodiments disclosed herein. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 should not be construed as a limitation to the present invention.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Please refer to Figures 1 to 4 , in the embodiments of the present invention, a dual-motor silent blower includes: a housing 1, one end of the housing 1 is an air inlet end provided with an air inlet 7, and the other end is an air outlet end provided with an air outlet 1;

[0027] Inside the housing 1, a circuit cavity 46, a motor cavity 44, and an air duct cavity 43 are sequentially arranged in the direction from the air inlet end to the air outlet end;

[0028] Two sets of drive motors 5 for realizing output work are arranged in the motor cavity 44; and a control unit 6 for realizing the control of the drive motor 5 (the control unit 6 may include: a control circuit board, a battery, etc.) is formed in the circuit cavity 46;

[0029] During operation, the drive motor 5 introduces air flow from the air inlet 7, passes through the circuit cavity 46, the drive motor 5, and the air duct cavity 43, and discharges it from the air outlet 1 to realize the work;

[0030] When in use, different functional nozzles (such as: a hair drying nozzle, a curling nozzle, a hair combing nozzle, and a salon nozzle) are installed at the air outlet 1 position of the housing 1 to meet different usage requirements in different scenarios;

[0031] Through the structural design of the parallel connection of two groups of drive motors 5, the fan structure can generate the normal air volume and air pressure required when using a traditional single large fan on the premise of using small motors.

[0032] When the air flow passes through the circuit cavity 46, it will take away the heat generated on the control unit 6 in the circuit cavity 46, achieving the effect of component heat dissipation.

[0033] The inner wall of the outer shell 1 is closely attached with a sound-absorbing layer 3. The noise generated when the two groups of drive motors 5 work will be effectively absorbed by the sound-absorbing material, thus achieving the reduction of working noise.

[0034] Furthermore, the drive motor 5 adopts a motor structure with an axial-flow impeller, which has the technical characteristics of simple structure, stable and reliable, low noise, and large air volume.

[0035] Furthermore, a large amount of eddy current will be generated when the air flow passes through the motor air outlet 1. In order to eliminate the adverse effects brought by the eddy current, two groups of air ducts 2 for realizing air flow guidance are arranged in the air duct cavity 43. The two groups of air ducts 2 correspond to the two groups of drive motors 5 one by one, and the outer diameter of the air duct 2 matches the motor air outlet 1 of the drive motor 5. One end of the air duct 2 is connected to the outlet of the drive motor 5, and the other end is connected to the air outlet 1; and when the air is discharged through the air duct 2, the air flow guidance work is realized, so that the air flow is concentrated and discharged, improving the overall air pressure.

[0036] Furthermore, a gap is provided between the air duct 2 and the air duct cavity 43. When the air flow passes through the air duct 2, since the air duct 2 is not in direct contact with the inner wall of the outer shell 1, the main flow wind noise is reduced by the radiation energy through the air duct 2 and then through the outer shell 1, and the maximum fan noise reduction effect is achieved in cooperation with the sound-absorbing layer 3.

[0037] Furthermore, the outer shell 1 is formed by buckling the upper shell 41 and the lower shell 42, and snap-lock pieces 45 are provided at the positions corresponding to the motor cavity 44 and the air outlet 1 in the upper shell 41 and the lower shell 42, and a semicircular snap groove 451 is formed on the snap-lock piece 45;

[0038] When the upper shell 41 and the lower shell 42 are buckled, the corresponding snap grooves 451 on the two groups of snap-lock pieces 45 cooperate with each other to form a limit card slot, and the drive motor 5 and the air duct 2 are limited and fixed through the limit card slot, which can avoid the situation of vibration and displacement, and improve the overall structural stability.

[0039] And in order to make the drive motor 5 more stable during operation, a group of snap-lock pieces 45 are provided at both ends of the upper shell 41 and the lower shell 42 corresponding to the motor cavity 44, which can realize the locking and fixing work at both ends of the drive motor 5.

[0040] Furthermore, an installation jack 22 for installing the heating wire mica sheet is provided inside the air flow duct 2. The heating wire mica sheet is supported and fixed through the installation jack 22. When the air flow passes through the heating wire mica sheet, heat is carried out to achieve the hot air effect.

[0041] Moreover, a through wire harness inlet 21 is provided on the side wall of the air flow duct 2, and a wire passing hole 452 communicating with the circuit cavity 46 is provided on the snap lock piece 45 at the position of the motor cavity 44. The wire supplying power to the heating wire mica sheet runs from the control unit 6, passes through the wire passing hole 452 and the wire harness inlet 21, and is connected to the heating wire mica sheet.

[0042] Furthermore, a sound absorption layer 3 is also closely attached to the inner wall position of the air inlet 7 of the outer housing 1, so as to reduce the oncoming flow noise when the air blower is in operation, and better improve the overall sound insulation effect of the air blower.

[0043] Preferably, the sound absorption performance of the sound absorption layer 3 depends on factors such as its friction, flexibility, and porosity. It blocks the noise propagation from the sound source, absorbs it again during propagation, and solves the noise problem structurally. Therefore, the sound absorption layer 3 is made of porous sound absorption materials, including but not limited to: one of glass wool, mineral wool, expanded perlite, and perforated sound absorption board.

[0044] It should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A double-motor silent fan, characterized in that, Comprising: A housing body, one end of the housing body is an air inlet end, provided with an air inlet, and the other end is an air outlet end, provided with an air outlet; Inside the housing body, a circuit cavity, a motor cavity and an air duct cavity are sequentially arranged in the direction from the air inlet end to the air outlet end; Two groups of driving motors are arranged in the motor cavity; and a control unit for realizing the control of the driving motors is formed in the circuit cavity; A sound absorption layer for realizing the sound absorption and noise reduction effect is closely attached to the inner wall of the housing body.

2. The dual-motor silent fan according to claim 1, wherein, The driving motor adopts a motor structure with an axial flow impeller.

3. The dual-motor silent blower according to claim 1, wherein Two groups of air flow ducts for realizing air flow guiding are arranged in the air duct cavity. The two groups of air flow ducts correspond to the two groups of driving motors one by one, and the outer diameter of the air flow duct matches the motor air outlet of the driving motor. One end of the air flow duct is connected to the outlet of the driving motor, and the other end is connected to the air outlet.

4. A dual-motor silent fan according to claim 1, characterized in that A gap is provided between the air flow duct and the air duct cavity.

5. The dual-motor silent fan according to claim 3, wherein The housing body is formed by buckling an upper housing and a lower housing, and snap-lock pieces are arranged at the positions corresponding to the motor cavity and the air outlet in the upper housing and the lower housing. A semicircular snap groove is formed on the snap-lock piece; When the upper housing and the lower housing are buckled, the corresponding snap grooves on the two groups of snap-lock pieces cooperate with each other to form a limiting card slot.

6. The dual-motor silent blower according to claim 5, wherein One group of snap-lock pieces are arranged at both ends of the upper housing and the lower housing corresponding to the motor cavity, which can realize the locking and fixing work at both ends of the driving motor.

7. The dual-motor silent blower according to claim 3, wherein, An installation jack for installing a heating wire mica sheet is arranged in the air flow duct.

8. A double-motor silent fan according to claim 1, characterized in that, A sound absorption layer is also closely attached to the inner wall position of the air inlet of the housing body.

9. A dual-motor silent blower according to any one of claims 1 or 8, characterized in that, The sound absorption layer is made of porous sound absorption materials, including but not limited to: one of glass wool, mineral wool, expanded perlite, and perforated sound absorption board.

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