CN204900295U - Active noise reduction air discharge fan - Google Patents
Active noise reduction air discharge fan Download PDFInfo
- Publication number
- CN204900295U CN204900295U CN201520658906.2U CN201520658906U CN204900295U CN 204900295 U CN204900295 U CN 204900295U CN 201520658906 U CN201520658906 U CN 201520658906U CN 204900295 U CN204900295 U CN 204900295U
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- CN
- China
- Prior art keywords
- guide duct
- fan
- controller
- loudspeaker
- noise reduction
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- Withdrawn - After Issue
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present case is an active noise reduction air discharge fan, includes: the fan, the grid, the guide duct, the speaker, it comprises one or more loudspeaker unit and speaker back cavity shell, the controller, it is a data signal processing system, should have 3 inputs and 2 outputs at least, the controller is installed in the outer wall of guide duct, and wherein, loudspeaker unit's input is connected to the output of controller, the microphone, the microphone comprises one or more microphone unit, the output of microphone unit through take care of and add circuit after be connected to the input of controller, still include motor, motor shaft, electrical resolver, including stator and active cell, the stator is fixed with the shell of motor, and the active cell is fixed with motor shaft, contain three group coil, the wherein a set of excitation coil that is, two sets of induction coil that are in addition in the electrical resolver, excitation coil's input connection director's output, two inputs of access controller are distinguished to induction coil's output.
Description
Technical field
The utility model relates to appliance field, particularly a kind of ventilating fan with active noise reduction function.
Background technique
Ventilating fan is also known as ventilation fan, its effect increases the circulation of air in a room, can get rid of rapidly after indoor solvent is volatilized, not only temperature-adjustable, humidity and sensory effect, also can avoid the blast because solvent in indoor air is too high and then cause or poisoning.According to the difference of airflow pattern, ventilating fan can be divided into centrifugal, the type such as axial flow and cross-flow type.Ventilating fan has a wide range of applications in family, public place and industrial field.
Ventilating fan is generally by driven by motor fan blade rotary actuation air-flow.By the impact that motor and fan blade rotate, in its radiated noise, generally there is significant low frequency periodic noise, frequency domain shows as line spectrum composition.Under family toilet, office etc. quietly occasion, above-mentioned noise brings larger bothering, and carries out suppression significant to it.Traditional noise reduction schemes sets up passive muffler material or structure, as cotton, the reactive muffler etc. of absorbing sound.But for low frequency spectrum lines noise, said method not only volume, weight greatly, also can bring the pressure loss, affect the performance of ventilating fan.Therefore, its noise of product general tree is on the market processed at present.
Model utility content
For overcoming the deficiencies in the prior art, the purpose of this utility model is to solve the high problem of current exhaust fan radiated noise, proposes a kind of Novel exhaust fan of integrated active noise control system, effectively suppresses the low frequency spectrum lines composition of its radiated noise.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of active noise reduction ventilating fan, comprising:
Fan 1, grid 4;
Guide duct 3, it is a tubular structure, and one end is installed on the intake grill of described fan, and the other end is installed on described grid;
Loudspeaker 5, it is made up of chamber enclosure 8 after one or more loudspeaker unit and loudspeaker;
Controller 7, it is a digital information processing system, structure is formed primarily of the peripheral components of AD, DA, processor, power supply and other necessity, at least should have 3 input ends and 2 output terminals, described controller is installed on the outer wall of described guide duct, and the toroidal cavity that after being arranged in described loudspeaker, chamber enclosure and guide duct outer wall are formed is not provided with the position of loudspeaker unit, wherein, the input end of described loudspeaker unit takes the mode of serial or parallel connection to be connected to the output terminal of described controller;
Microphone 6, described microphone is made up of one or more microphone unit, is installed on the inner side of described grid, and the output terminal of described microphone unit is connected to the input end of described controller after conditioning and add circuit;
Also comprise, motor 9 and machine shaft 10;
Rotary transformer 2, comprises stator and mover, and it is installed on described fan electromotor position, and the shell of described stator and motor is fixed, and mover and described machine shaft are fixed; Containing three groups of coils in described rotary transformer, wherein one group is field coil, and other two groups is inductor coil; The input end of described field coil connects the output terminal of described controller, and the output terminal of described inductor coil accesses wherein two input ends of described controller respectively.
Preferably, described active noise reduction ventilating fan, wherein, the intake grill of the cross section of described guide duct and grid size and fan adapts.
Preferably, described active noise reduction ventilating fan, wherein, described loudspeaker unit is installed in perforation corresponding to described guide duct sidewall, and multiple loudspeaker unit distributes along the circumference of described guide duct sidewall.
Preferably, described active noise reduction ventilating fan, wherein, in the even plane be distributed in inside described grid of described microphone unit.
Preferably, described active noise reduction ventilating fan, wherein, after described loudspeaker, chamber enclosure is a circular tube structure, is installed on the outer wall of described guide duct, and the toroidal cavity formed between itself and guide duct outer wall is as the back cavity of described loudspeaker unit.
The beneficial effects of the utility model: this case provides a kind of active noise reduction ventilating fan, compared with existing ventilating fan, active noise control system is utilized to considerably reduce the noise of ventilating fan, volume, weight significantly do not increase simultaneously, the active noise control system of what the utility model provided be applied to ventilating fan, also can be directly used in the ACTIVE CONTROL of other occasion fan, fan noise.
Accompanying drawing explanation
Fig. 1 is the structural representation of the active noise reduction ventilating fan described in the utility model one embodiment;
Wherein, 1-fan, 2-rotary transformer, 3-guide duct, 4-grid, 5-loudspeaker, 6-microphone, 7-controller, chamber enclosure after 8-loudspeaker, 9-motor, 10-machine shaft.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, can implements according to this with reference to specification word to make those skilled in the art.
A kind of active noise reduction ventilating fan, refers to accompanying drawing 1, comprising:
Fan 1, grid 4;
Guide duct 3, it is a tubular structure, and one end is installed on the intake grill of described fan, and the other end is installed on described grid;
Loudspeaker 5, it is made up of chamber enclosure 8 after one or more loudspeaker unit and loudspeaker;
Controller 7, it is a digital information processing system, structure is formed primarily of the peripheral components of AD, DA, processor, power supply and other necessity, at least should have 3 input ends and 2 output terminals, described controller is installed on the outer wall of described guide duct, and the toroidal cavity that after being arranged in described loudspeaker, chamber enclosure and guide duct outer wall are formed is not provided with the position of loudspeaker unit, wherein, the input end of described loudspeaker unit takes the mode of serial or parallel connection to be connected to the output terminal of described controller;
Microphone 6, described microphone is made up of one or more microphone unit, is installed on the inner side of described grid, and the output terminal of described microphone unit is connected to the input end of described controller after conditioning and add circuit;
Also comprise, motor 9 and machine shaft 10;
Rotary transformer 2, comprises stator and mover, and it is installed on described fan electromotor position, and the shell of described stator and motor is fixed, and mover and described machine shaft are fixed; Containing three groups of coils in described rotary transformer, wherein one group is field coil, and other two groups is inductor coil; The input end of described field coil connects the output terminal of described controller, and the output terminal of described inductor coil accesses wherein two input ends of described controller respectively.Give in Fig. 1 and use the typical structure of axial flow fan, but in other embodiments, fan being not limited to axial flow, also can be centrifugal, cross-flow type and other similar form.In addition, in other embodiments, fan also can have some the common accessory structure for ventilating fan, the such as safety check etc. at exhaust outlet place, and the embodiment provided in Fig. 1, for circular, also can be other shape in other embodiments.
Further, the cross section of described guide duct and the intake grill of grid size and fan adapt.
Further, described loudspeaker unit is installed in perforation corresponding to described guide duct sidewall, and multiple loudspeaker unit distributes along the circumference of described guide duct sidewall.
Further, in the even plane be distributed in inside described grid of described microphone unit;
Further, after described loudspeaker, chamber enclosure is a circular tube structure, is installed on the outer wall of described guide duct, and the toroidal cavity formed between itself and guide duct outer wall is as the back cavity of described loudspeaker unit.
Although embodiment of the present utility model is open as above, but it is not restricted to listed in specification and mode of execution utilization, it can be applied to various applicable field of the present utility model completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the utility model is not limited to specific details and illustrates here and the legend described.
Claims (5)
1. an active noise reduction ventilating fan, is characterized in that, comprising:
Fan (1), grid (4);
Guide duct (3), it is a tubular structure, and one end is installed on the intake grill of described fan, and the other end is installed on described grid;
Loudspeaker (5), it is made up of chamber enclosure (8) after one or more loudspeaker unit and loudspeaker;
Controller (7), it is a digital information processing system, at least should have 3 input ends and 2 output terminals, described controller is installed on the outer wall of described guide duct, and the toroidal cavity that after being arranged in described loudspeaker, chamber enclosure and guide duct outer wall are formed is not provided with the position of loudspeaker unit, wherein, the input end of described loudspeaker unit takes the mode of serial or parallel connection to be connected to the output terminal of described controller;
Microphone (6), described microphone is made up of one or more microphone unit, is installed on the inner side of described grid, and the output terminal of described microphone unit is connected to the input end of described controller after conditioning and add circuit;
Also comprise, motor (9) and machine shaft (10);
Rotary transformer (2), comprises stator and mover, and it is installed on described fan electromotor position, and the shell of described stator and motor is fixed, and mover and described machine shaft are fixed; Containing three groups of coils in described rotary transformer, wherein one group is field coil, and other two groups is inductor coil; The input end of described field coil connects the output terminal of described controller, and the output terminal of described inductor coil accesses wherein two input ends of described controller respectively.
2. active noise reduction ventilating fan as claimed in claim 1, it is characterized in that, the intake grill of the cross section of described guide duct and grid size and fan adapts.
3. active noise reduction ventilating fan as claimed in claim 1, it is characterized in that, described loudspeaker unit is installed in perforation corresponding to described guide duct sidewall, and multiple loudspeaker unit distributes along the circumference of described guide duct sidewall.
4. active noise reduction ventilating fan as claimed in claim 1, is characterized in that, in the even plane be distributed in inside described grid of described microphone unit.
5. active noise reduction ventilating fan as claimed in claim 1, it is characterized in that, after described loudspeaker, chamber enclosure is a circular tube structure, is installed on the outer wall of described guide duct, and the toroidal cavity formed between itself and guide duct outer wall is as the back cavity of described loudspeaker unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520658906.2U CN204900295U (en) | 2015-08-28 | 2015-08-28 | Active noise reduction air discharge fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520658906.2U CN204900295U (en) | 2015-08-28 | 2015-08-28 | Active noise reduction air discharge fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204900295U true CN204900295U (en) | 2015-12-23 |
Family
ID=54922476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520658906.2U Withdrawn - After Issue CN204900295U (en) | 2015-08-28 | 2015-08-28 | Active noise reduction air discharge fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204900295U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065308A (en) * | 2015-08-28 | 2015-11-18 | 苏州清听声学科技有限公司 | Active noise reduction exhaust fan and line-spectrum noise active control method thereof |
-
2015
- 2015-08-28 CN CN201520658906.2U patent/CN204900295U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065308A (en) * | 2015-08-28 | 2015-11-18 | 苏州清听声学科技有限公司 | Active noise reduction exhaust fan and line-spectrum noise active control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151223 Effective date of abandoning: 20170901 |
|
| AV01 | Patent right actively abandoned |