CN116292428A

CN116292428A - Blower fan

Info

Publication number: CN116292428A
Application number: CN202211253136.4A
Authority: CN
Inventors: 莫皓然; 陈世昌; 韩永隆; 黄启峰; 蔡长谚; 郭俊毅
Original assignee: Microjet Technology Co Ltd
Current assignee: Microjet Technology Co Ltd
Priority date: 2021-12-07
Filing date: 2022-10-13
Publication date: 2023-06-23
Also published as: TW202323669A; TWI825521B

Abstract

A blower includes a gas orifice plate, a chamber frame, an actuator, an insulating frame, and a conductive frame. The gas jet hole sheet comprises a suspension part. The cavity frame is arranged on the air spraying hole sheet. The actuating body comprises a piezoelectric carrier plate, an adjusting resonance plate and a piezoelectric plate, and is arranged on the cavity frame. The insulating frame is arranged on the actuating body. The conductive frame is arranged on the insulating frame. The air hole plate, the cavity frame, the piezoelectric carrier plate, the insulating frame and the conductive frame are manufactured into a module structure, and the module structure has a length and a width, wherein the length is between 11 mm and 14 mm, and the width is between 11 mm and 14 mm.

Description

Blower fan

[ field of technology ]

The present disclosure relates to a blower, and more particularly to a blower with thin, portable and noise reduction.

[ background Art ]

Many blowers, when driven, push gas out by vibration. The noise generated by the physical phenomenon of the blower can not achieve the portable purpose of portability and comfort because of the rapid high-frequency vibration. Therefore, how to develop a blower that can improve the above-mentioned shortcomings of the prior art, and can make the device small in size, miniaturized and silent, and further achieve light and comfortable miniaturization is an urgent problem to be solved at present.

[ invention ]

The main purpose of the present invention is to provide a blower which is operated to reduce the noise generated, and the blower which is improved by the design of the present invention can further achieve the effect of miniaturization and silence.

One broad aspect of the present invention is a blower, comprising: the air injection hole piece comprises a suspension part, wherein the suspension part is provided with a hollow hole and can vibrate in a bending way; a cavity frame arranged on the air jet hole sheet; the actuating body is formed by stacking a piezoelectric carrier plate, an adjusting resonance plate and a piezoelectric plate from bottom to top in sequence, and is arranged on the cavity frame, and the piezoelectric carrier plate is used for receiving a first voltage and a second voltage so as to enable the piezoelectric plate to generate reciprocating bending vibration, wherein the first voltage and the second voltage are alternately applied to the piezoelectric carrier plate at a frequency; an insulating frame arranged on the actuating body; and a conductive frame disposed on the insulating frame; the air jet hole sheet, the cavity frame, the piezoelectric carrier plate, the insulating frame and the conducting frame are manufactured into a module structure, and the module structure has a length and a width, wherein the length is between 11 mm and 14 mm, and the width is between 11 mm and 14 mm.

[ description of the drawings ]

Fig. 1 is an exploded schematic view of the blower components of the present case.

Fig. 2A is a schematic front view of the blower.

FIG. 2B is a schematic diagram of the reverse side of the blower.

Fig. 3A to 3D are schematic views illustrating the operation of the blower.

[ symbolic description ]

10: blower fan

101: flexible sheet

101b: center hole

101c: side wall

102: air jet hole sheet

102a: suspension part

102b: hollow hole

102c: side wall

103: cavity frame

104: actuating body

104a: piezoelectric carrier plate

104b: adjusting a resonant panel

104c: piezoelectric plate

105: insulating frame

106: conductive frame

107: resonant cavity

108: airflow chamber

L: length of

R1: diameter of the center hole

R2: diameter of hollow hole

W: width of (L)

Y: an axis line

[ detailed description ] of the invention

Embodiments that exhibit the features and advantages of the present disclosure will be described in detail in the following description. It will be understood that various changes can be made in the above-described embodiments without departing from the scope of the invention, and that the description and illustrations herein are to be taken in an illustrative and not a limiting sense.

Referring to fig. 1 to 3A, a blower 10 is provided, which includes a flexible sheet 101, a gas jet plate 102, a chamber frame 103, an actuator 104, an insulating frame 105, and a conductive frame 106. The flexible sheet 101 is a thin sound-deadening sheet, and the center of the flexible sheet 101 has a central hole 101b. The air hole plate 102 comprises a suspension 102a, and the flexible sheet 101 is disposed on the air hole plate 102. The center of the suspension 102a has a hollow hole 102b, and the suspension 102a can vibrate in a bending manner. Wherein the flexible sheet 101The center point of the central hole 101b of the gas injection plate 102 and the center point of the hollow hole 102b of the gas injection plate 102 are located on the same axis Y. The cavity frame 103 is disposed on the gas orifice plate 102. The actuator 104 is composed of a piezoelectric carrier 104a, an adjusting resonator 104b and a piezoelectric plate 104c stacked sequentially from bottom to top, and the actuator 104 is disposed on the cavity frame 103. The piezoelectric carrier 104a is configured to receive a first voltage and a second voltage, so that the piezoelectric carrier 104c generates reciprocating bending vibration, and the first voltage and the second voltage are alternately applied to the piezoelectric carrier 104a at a frequency; the first voltage and the second voltage may be positive and negative poles of the same power system (not shown), but are not limited thereto. In other embodiments, the power supply system of the first voltage or the second voltage may be adjusted according to design requirements (e.g., sine wave, pulse wave, square wave, sawtooth … …, etc.). In the embodiment, the first voltage is square wave +6V, the second voltage is square wave-6V, i.e. the first voltage and the second voltage are between +6V, the peak-to-peak value (V _PP ) The first voltage and the second voltage are alternated at a frequency of between 25 khz and 30 khz, preferably about 28 khz, but not limited thereto. In other embodiments, the power system, the voltage value, the frequency of the first voltage and the second voltage alternation may be adjusted according to design requirements, wherein the output air flow of the blower 10 is between 0.1 and 0.4 liters per minute. An insulating frame 105 is provided on the actuator 104. The conductive frame 106 is disposed on the insulating frame 105.

Referring to fig. 2 and 3A, the blower 10 is made of a gas jet hole plate 102, a cavity frame 103, a piezoelectric carrier plate 104a, an insulating frame 105 and a conductive frame 106, and the module structure has a length L and a width W, wherein the length L of the module structure is between 11 millimeters (mm) and 14 millimeters (mm) and the width W is between 11 millimeters (mm) and 14 millimeters (mm), but not limited thereto. In one embodiment, the module structure has a length L of 12.8 millimeters (mm) and a width W of 12.8 millimeters (mm). It is noted that the ratio of the length or width among the gas jet hole plate 102, the cavity frame 103, the piezoelectric carrier plate 104a (without electrode pins), the insulating frame 105, and the conductive frame 106 (without electrode pins) is the same. In some embodiments, the length or width of the conductive frame 106 is slightly smaller than the length or width of the insulating frame 105 (as shown in fig. 3A), but is not limited thereto.

It should be noted that, in the embodiment, when the piezoelectric carrier 104a receives the first voltage and the conductive frame 106 receives the second voltage, the piezoelectric plate 104c generates bending vibration in a first direction. When the piezoelectric carrier 104a receives the second voltage and the conductive frame 106 receives the first voltage, the piezoelectric plate 104c generates bending vibration in a second direction opposite to the first direction. In the embodiment, the first direction and the second direction are opposite directions, but not limited thereto. In other embodiments of the present disclosure, the first direction and the second direction may also be expressed as other direction relationships, but not limited thereto.

It should be noted that, in the embodiment, a resonance chamber 107 is formed among the actuating body 104, the cavity frame 103 and the suspending portion 102a, the first voltage and the second voltage are alternately applied to the actuating body 104 at a frequency, so that the actuating body 104 is driven to drive the air hole plate 102 to resonate, and the suspending portion 102a of the air hole plate 102 generates reciprocating bending vibration, so that the gas enters the resonance chamber 107 through the central hole 101b of the flexible sheet 101 and the hollow hole 102b of the air hole plate 102 and is then discharged, thereby realizing the transmission flow of the gas.

Referring to fig. 2B and 3A, in the embodiment, the central hole 101B of the flexible sheet 101 has a central hole diameter R1, and the hollow hole 102B of the air hole plate 102 has a hollow hole diameter R2, and the central hole diameter R1 is smaller than the hollow hole diameter R2. It should be noted that, in the schematic diagram of the reverse side of the present blower shown in fig. 2B, the periphery of the hollow hole 102B, that is, the periphery surrounded by the hollow hole diameter R2, cannot be seen from the reverse side, and for convenience, the relationship between the hollow hole diameter R2 and the central hole diameter R1 is indicated by a dashed line. More specifically, as shown in fig. 3A, the axis Y passes through the central bore 101b. When the flexible sheet 101 and the suspending portion 102a are assembled, the central hole 101b of the flexible sheet 101 is aligned with the hollow hole 102b of the suspending portion 102a, and stacked along the direction of the axis Y. Accordingly, after stacking, the flexible sheet 101 and the suspension 102a will have the center point of the central hole 101b and the center point of the hollow hole 102b located on the same axis Y. In some embodiments, the central hole 101b is located at the very center of the flexible sheet 101; the hollow hole 102b is located at the very center of the suspension 102 a; the center point of the central hole 101b and the center point of the hollow hole 102b are located on the same axis Y. In some embodiments, the center of the central hole 101b is offset from the center of the flexible sheet 101; the center of the hollow hole 102b is located at the exact center of the suspended portion 102 a; the center point of the central hole 101b and the center point of the hollow hole 102b are located on the same axis Y. In some embodiments, the center of the central hole 101b is located at the center of the flexible sheet 101; the center of the hollow hole 102b and the center of the suspension part 102a are arranged in a staggered way; the center point of the central hole 101b and the center point of the hollow hole 102b are located on the same axis Y. In some embodiments, the center of the central hole 101b is offset from the center of the flexible sheet 101; the center of the hollow hole 102b and the center of the suspension part 102a are arranged in a staggered way; the center point of the central hole 101b and the center point of the hollow hole 102b are located on the same axis Y. In addition, the periphery of the central hole 101b surrounds a sidewall 101c, and the periphery of the hollow hole 102b surrounds a sidewall 102c. Because of the hollow hole diameter R2 being larger than the center hole diameter R1, the side wall 101c extends toward the center position of the center hole 101b and covers a part of the hollow hole 102b. In one embodiment, sidewall 101c is substantially parallel to sidewall 102c.

It should be noted that, in other embodiments of the present disclosure, the hardness of the flexible sheet 101 is relatively smaller than that of the suspension 102a, but not limited thereto.

It should be noted that, in other embodiments of the present disclosure, the flexibility of the flexible sheet 101 is relatively greater than the flexibility of the suspending portion 102a, but not limited thereto.

It should be noted that, in other embodiments of the present disclosure, the elasticity of the flexible sheet 101 is relatively greater than that of the suspension portion 102a, but not limited thereto.

Furthermore, it should be noted that, in the embodiment, the central hole 101b of the flexible sheet 101 has a central hole diameter R1, and the central hole diameter R1 is between 0.1 millimeter (mm) and 0.14 millimeter (mm); the hollow holes 102b of the gas jet plate 102 have a hollow hole diameter R2, and the hollow hole diameter R2 is between 0.4 millimeters (mm) and 2 millimeters (mm).

In addition, it should be noted that, in the embodiment, the central hole 101b of the flexible sheet 101 is a circle; the central hole 101b of the flexible sheet 101 may also be a square, a diamond or a parallelogram, and the width of the central hole 101b is between 0.1 millimeter (mm) and 0.14 millimeter (mm), but not limited thereto. The shape and width of the central hole 101b of the flexible sheet 101 can be changed according to design requirements.

In addition, it should be noted that, in the embodiment, the hollow hole 102b of the air hole plate 102 is a circle; the hollow hole 102b of the air hole plate 102 may also be a square, a diamond or a parallelogram, and the width of the hollow hole 102b is between 0.4 millimeter (mm) and-2 millimeters (mm), but not limited thereto, and the shape and width of the hollow hole 102b of the air hole plate 102 may be changed according to design requirements.

Referring next to fig. 3B to 3D, schematic operation of the blower 10 is shown. First, when the actuator 104 receives a first voltage and the conductive frame 106 receives a second voltage, the piezoelectric plate 104c generates bending vibration in a first direction, and the actuator 104 is composed of a piezoelectric carrier 104a, an adjusting resonant plate 104b and the piezoelectric plate 104c stacked in sequence from bottom to top. As shown in fig. 3B, when the actuator 104 generates bending vibration in a first direction, the resonance chamber 107 generates negative pressure, so that gas enters the resonance chamber 107 through the central hole 101B of the flexible sheet 101 and the hollow hole 102B of the gas jet plate 102.

Then, due to the instantaneous negative pressure of the resonance chamber 107, the orifice plate 102 is driven by the actuator 104, so that the orifice plate 102 and the actuator 104 resonate (as shown in fig. 3C). When the actuator 104 receives the second voltage and the conductive frame 106 receives the first voltage, the piezoelectric plate 104c generates flexural vibration in a second direction opposite to the first direction (as shown in fig. 3D), and at this time, the resonance chamber 107 generates positive pressure, so that the gas flows out from the resonance chamber 107 to the gas flow chamber 108 through the hollow hole 102b of the gas jet plate 102 and the central hole 101b of the flexible sheet 101.

When the piezoelectric carrier 104a and the conductive frame 106 of the actuator 104 respectively receive the first voltage and the second voltage alternating at a high frequency, the gas is continuously sucked and discharged from the resonance chamber 107 through the hollow hole 102b of the gas jet plate 102 and the central hole 101b of the flexible sheet 101, and the discharged gas follows Bernoulli's principle, so that the gas in the gas flow chamber 108 flows along the direction indicated by the arrow in FIG. 3D.

In addition, the blower 10 with the flexible sheet 101 is exemplified by a process with a length and width of 12.8 mm, and the output air flow of the blower 10 is between 0.1 and 0.4 liters per minute, and the noise of the physical phenomenon generated by the air flow is reduced to below 30dB by the flexible sheet 101.

In summary, the blower provided in the present disclosure, besides miniaturization, is capable of effectively reducing the noise of the physical phenomenon generated by the gas flow, and utilizes the hardness, flexibility and elasticity of the soft sheet and the suspension portion, and the differential design of the diameter of the central hole and the diameter of the hollow hole, and the first voltage and the second voltage are matched to produce a mute blower with a frequency between 25 khz and 30 khz, and the peak-to-peak value of the first voltage and the second voltage is 12 volts, so as to generate a stronger bernoulli effect, which is very industrial-applicable.

The present application is modified in this manner by those skilled in the art without departing from the scope of the appended claims.

Claims

1. A blower (10), characterized by comprising:

a gas jet hole plate (102) comprising a suspension portion (102 a), wherein the suspension portion (102 a) has a hollow hole (102 b), and the suspension portion (102 a) is capable of bending and vibrating;

a cavity frame (103) arranged on the air jet hole sheet (102);

an actuating body (104) composed of a piezoelectric carrier plate (104 a), an adjusting resonance plate (104 b) and a piezoelectric plate (104 c) which are sequentially overlapped from bottom to top, wherein the actuating body (104) is arranged on the cavity frame (103), the piezoelectric carrier plate (104 a) is used for receiving a first voltage and a second voltage so that the piezoelectric plate (104 c) generates reciprocating bending vibration, and the first voltage and the second voltage are alternately applied to the piezoelectric carrier plate (104 a) at a frequency;

an insulating frame (105) disposed on the actuating body (104); and

a conductive frame (106) disposed on the insulating frame (105);

the air hole plate (102), the cavity frame (103), the piezoelectric carrier plate (104 a), the insulating frame (105) and the conductive frame (106) are manufactured into a module structure, and the module structure has a length (L) and a width (W), wherein the length (L) is between 11 mm and 14 mm, and the width (W) is between 11 mm and 14 mm.

2. A blower (10) as set forth in claim 1, characterized in that the modular structure has the length (L) of 12.8 millimeters and the width (W) of 12.8 millimeters.

3. The blower (10) of claim 1, wherein the frequency is between 25 khz and 30 khz.

4. A blower (10) as claimed in claim 3, characterized in that the frequency is about 28 khz.

5. The blower (10) of claim 1, wherein the first voltage and the second voltage are between +6 volts, and the peak-to-peak value of the first voltage and the second voltage is 12 volts.

6. The blower (10) of claim 1, wherein the output airflow is between 0.1 and 0.4 liters per minute.

7. The blower (10) of claim 1, further comprising a flexible sheet (101), the flexible sheet (101) being disposed under the air hole sheet (102) and having a central hole (101 b), wherein a center point of the central hole (101 b) of the flexible sheet (101) and a center point of the hollow hole 102b of the suspension portion (102) are located at an axis (Y).

8. The blower (10) of claim 7, wherein when the piezoelectric carrier plate (104 a) receives the first voltage and the conductive frame (106) receives the second voltage, the piezoelectric plate (104 c) generates bending vibrations in a first direction, wherein when the piezoelectric carrier plate (104 a) receives the second voltage and the conductive frame (106) receives the first voltage, the piezoelectric plate (104 c) generates bending vibrations in a second direction opposite to the first direction, wherein a resonant chamber (107) is formed between the actuator (104), the cavity frame (103) and the suspension (102 a), and the resonant chamber (107) is formed by alternately applying the first voltage and the second voltage to the actuator (104) at the frequency, the actuator (104) is driven to generate the resonant vibrations to drive the air jet (102), such that the suspension (102 a) of the air jet (102) generates reciprocating bending vibrations to cause air to enter the resonant chamber (107) through the central hole (101 b) of the flexible sheet (101) and the suspension (102 a).

9. The blower (10) of claim 7, wherein the central aperture (101 b) of the flexible sheet (101) has a central aperture diameter (R1), the hollow aperture (102 b) of the suspension (102 a) has a hollow aperture diameter (R2), and the central aperture diameter (R1) is smaller than the hollow aperture diameter (R2).

10. The blower (10) of claim 7, wherein the soft sheet (101) has a hardness less than the hardness of the suspended portion (102 a).

11. The blower (10) of claim 7, wherein the flexible sheet (101) has a greater degree of deflection than the suspended portion (102 a).

12. The blower (10) of claim 7, wherein the flexible sheet (101) has an elasticity greater than an elasticity of the suspended portion (102 a).

13. The blower (10) of claim 7, wherein the central aperture (101 b) of the flexible sheet (101) is a circle, a square, a diamond, or a parallelogram.

14. The blower (10) of claim 7, wherein the hollow bore (102 b) of the suspension portion (102 a) is a circle, a square, a diamond, or a parallelogram.