CN111306614A - Active noise reduction air conditioner and control method thereof - Google Patents
Active noise reduction air conditioner and control method thereof Download PDFInfo
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- CN111306614A CN111306614A CN202010140335.9A CN202010140335A CN111306614A CN 111306614 A CN111306614 A CN 111306614A CN 202010140335 A CN202010140335 A CN 202010140335A CN 111306614 A CN111306614 A CN 111306614A
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000010586 diagram Methods 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention belongs to the field of air conditioners, and particularly provides an active noise reduction air conditioner and a control method thereof. The invention aims to solve the problem that the existing air conditioner cannot reduce the noise of low-frequency noise. The active noise reduction air conditioner comprises an outdoor unit and an indoor unit, wherein the indoor unit further comprises an indoor sound collector, an indoor filter, an indoor active noise reduction processing module and an indoor loudspeaker which are sequentially connected, and the indoor loudspeaker is a low-frequency loudspeaker. The air conditioner can emit noise reduction sound waves corresponding to low-frequency noise, so that the low-frequency noise is offset, and the purpose of noise reduction is achieved. And, through the design of woofer, also do not carry extra special lectotype demand to the indoor filter.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides an active noise reduction air conditioner and a control method thereof.
Background
In the normal operation process of the air conditioner, the rotation of a fan of an indoor unit of the air conditioner causes wind noise, vibration of the indoor unit causes humming caused by resonance with a wall body, and the like. The existing noise-removing method for indoor unit mainly includes sticking liner on air outlet, optimizing fan blade shape, etc., and most of them are passive noise-reducing. However, noise generated by the air conditioner has both high-frequency noise and low-frequency noise, passive noise reduction has strong elimination capability to the high-frequency noise, but has no policy to the low-frequency noise, and passive noise reduction cannot be performed in a noise range of 1000Hz or lower, while the low-frequency noise can affect human physiological hearing and nervous system, and can seriously threaten the health of users after long-term existence.
Accordingly, there is a need in the art for a new active noise reduction air conditioner and a control method thereof to solve the problem that the existing air conditioner cannot reduce the noise of low-frequency noise.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides an active noise reduction air conditioner, which comprises an outdoor unit and an indoor unit, and is characterized in that the indoor unit further comprises an indoor sound collector, an indoor filter, an indoor active noise reduction processing module and an indoor loudspeaker, which are sequentially connected, and the indoor loudspeaker is a low frequency loudspeaker.
In the preferable technical scheme of the active noise reduction air conditioner, the low-frequency loudspeaker is a low-frequency HIFI sound.
In a preferred embodiment of the active noise reduction air conditioner, the indoor filter is an all-pass filter.
In the above preferred technical solution of the active noise reduction air conditioner, the indoor sound collector is a microphone.
The invention also provides an active noise reduction air conditioner which comprises an outdoor unit and an indoor unit and is characterized in that the outdoor unit further comprises an outdoor sound collector, an outdoor filter, an outdoor active noise reduction processing module and an outdoor loudspeaker which are sequentially connected, wherein the outdoor loudspeaker is a low-frequency loudspeaker.
The invention also provides a control method of the active noise reduction air conditioner, the active noise reduction air conditioner comprises an outdoor unit and an indoor unit, and the control method is characterized in that the indoor unit further comprises an indoor sound collector, an indoor filter, an indoor active noise reduction processing module and an indoor loudspeaker which are sequentially connected, the indoor loudspeaker is a low-frequency loudspeaker, and the control method comprises the following steps:
s100, controlling the indoor sound collector to collect noise;
s200, controlling the indoor filter to process noise;
s300, controlling the indoor active noise reduction processing module to receive processed noise;
s400, controlling the indoor active noise reduction processing module to process the received noise in real time, generating a noise reduction sound wave output signal and transmitting the noise reduction sound wave output signal to the indoor loudspeaker.
In a preferred embodiment of the above method for controlling an active noise reduction air conditioner, after step S400, the method further includes:
s410, the process returns to step S100 again at intervals of Δ T1.
The invention also provides a control method of the active noise reduction air conditioner, the active noise reduction air conditioner comprises an outdoor unit and an indoor unit, and the control method is characterized in that the outdoor unit further comprises an outdoor sound collector, an outdoor filter, an outdoor active noise reduction processing module and an outdoor loudspeaker which are sequentially connected, the outdoor loudspeaker is a low-frequency loudspeaker, and the control method further comprises the following steps:
s500, controlling the outdoor sound collector to collect noise;
s600, controlling the outdoor filter to process noise;
s700, controlling the outdoor active noise reduction processing module to receive processed noise;
and S800, controlling the outdoor active noise reduction processing module to process the received noise in real time, generating a noise reduction sound wave output signal and transmitting the noise reduction sound wave output signal to the outdoor loudspeaker.
In a preferred embodiment of the above method for controlling an active noise reduction air conditioner, after step S800, the method further includes:
s810, the process returns to step S500 every Δ T2.
In a preferred embodiment of the above method for controlling an active noise reduction air conditioner, Δ T2 is 20 s.
The active noise reduction air conditioner comprises an outdoor unit and an indoor unit, wherein the indoor unit further comprises an indoor sound collector, an indoor filter, an indoor active noise reduction processing module and an indoor loudspeaker which are sequentially connected, and the indoor loudspeaker is a low-frequency loudspeaker.
Through the arrangement mode, the air conditioner can emit noise reduction sound waves corresponding to low-frequency noise, so that the low-frequency noise is counteracted, and the purpose of noise reduction is achieved. Specifically, the woofer has been described in the prior art, and has a main function of outputting only a low-frequency volume, a low-frequency reproduction lower limit, and a low high-frequency cutoff frequency, so that a high-frequency backward sound wave of a sound emitted by the woofer is attenuated, a vibration system of the woofer has a large mass and a high compliance, and a frequency range of the woofer may be 20 hz to 1000 hz. Therefore, the low-frequency loudspeaker does not need to reduce the amplitude of the received high-frequency noise through an indoor filter, avoids high-frequency output in a mode of self physical characteristics, avoids high-frequency howling, and prevents the situation that the sharp high-frequency noise is increased due to high-frequency superposition.
Drawings
An active noise reduction air conditioner and a control method thereof of the present invention will be described with reference to the accompanying drawings. In the drawings:
FIG. 1 is a schematic diagram of the overall structure of an active noise reduction air conditioner of the present invention;
FIG. 2 is a schematic structural diagram of an indoor unit of an active noise reduction air conditioner according to the present invention;
FIG. 3 is a schematic diagram of an outdoor unit of an active noise reduction air conditioner according to the present invention;
FIG. 4 is a schematic view of the connection relationship of the indoor unit structure of the active noise reduction air conditioner of the present invention;
FIG. 5 is a method of controlling the active noise reduction air conditioner according to the present invention;
FIG. 6 is a schematic diagram illustrating the connection relationship between the outdoor units of the active noise reduction air conditioner of the present invention;
fig. 7 illustrates a method for controlling an outdoor unit of an active noise reduction air conditioner according to the present invention.
List of appendage designations:
1. an indoor unit; 11. an indoor sound collector; 12. an indoor speaker; 2. an outdoor unit; 21. an outdoor sound collector; 22. an outdoor speaker.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. For example, although the indoor filter and the outdoor filter in the description have been described using an all-pass filter as an example, it is obvious that the present invention may also use an adaptive filter or a low-pass filter that allows low-frequency noise to pass, as long as the low-frequency noise can be allowed to pass. The selection types of the indoor filter and the outdoor filter are various and are not listed.
Referring to fig. 1, 2 and 4, an embodiment of an active noise reduction air conditioner of the present invention will be described in detail.
As shown in fig. 1, 2 and 4, the active noise reduction air conditioner includes an outdoor unit 2 and an indoor unit 1, the indoor unit 1 further includes an indoor sound collector 11, an indoor filter (inside the indoor unit, not shown), an indoor active noise reduction processing module (inside the indoor unit, not shown) and an indoor speaker 12, which are connected in sequence, and the indoor speaker 12 is a low frequency speaker.
The whole working process can be embodied by the control method of the active noise reduction air conditioner, as shown in fig. 5, the control method of the active noise reduction air conditioner comprises the following steps:
s100, controlling an indoor sound collector to collect noise;
s200, controlling an indoor filter to process noise;
s300, controlling an indoor active noise reduction processing module to receive processed noise;
s400, controlling an indoor active noise reduction processing module to process received noise in real time, generating a noise reduction sound wave output signal and transmitting the noise reduction sound wave output signal to an indoor loudspeaker.
S410, the process returns to step S100 again at intervals of Δ T1.
The active noise reduction air conditioner firstly collects noise, then processes the noise through an indoor filter to enable the noise to be sound waves with the same amplitude and opposite phases of 180 degrees, the sound waves are input into an indoor active noise reduction processing module, noise reduction sound wave output signals are generated through internal conversion and are transmitted to an indoor loudspeaker 12, and the indoor loudspeaker 12 sends out low-frequency noise reduction sound waves to be offset with the low-frequency noise.
For the indoor unit 1, the most important noise source is generated when the fan of the indoor unit 1 rotates, and the fan of the indoor unit 1 has different rotating speeds and different frequencies of the generated noise, wherein, there are both low-frequency noise and high-frequency noise, and the high-frequency noise can be easily solved by physical cotton wadding cloth or other blocking schemes, but the low-frequency noise is difficult to block, and the indoor filter can obtain the function of filtering the high-frequency noise according to the type, such as selecting an adaptive filter or selecting a low-pass filter, but because the invention selects a special indoor speaker 12, that is, the indoor speaker 12 is a low-frequency speaker, which can block the high-frequency noise, the filter selection does not need to select the low-pass filter or the adaptive filter deliberately, but only can output low-frequency sound waves through the low-frequency speaker, the elimination of indoor low-frequency noise is realized. The low-frequency speaker receives the noise reduction sound wave output signal of the indoor active noise reduction processing module, and then sends out low-frequency sound waves opposite to the noise of the low-frequency part, and the harmonics of the low-frequency sound waves are mutually superposed and then offset, so that the low-frequency noise of the indoor unit 1 is eliminated.
While the low frequency noise of the indoor unit 1 is treated as described above, the low frequency noise is also generated in the outdoor unit 2, and the low frequency noise can penetrate through the wall or window into the room, so that it is important to eliminate the noise of the outdoor unit 2, the present invention also provides an active noise reduction air conditioner, as shown in fig. 1, 3 and 6, comprising the outdoor unit 2 and the indoor unit 1, wherein the outdoor unit 2 further comprises an outdoor sound collector 21, an outdoor filter (in the outdoor unit, not shown), an outdoor active noise reduction treatment module (in the outdoor unit, not shown) and an outdoor speaker 22, which are connected in sequence, and the outdoor speaker 22 is a low frequency speaker.
The control method is shown in fig. 7 and comprises the following steps:
s500, controlling an outdoor sound collector to collect noise;
s600, controlling an outdoor filter to process noise;
s700, controlling an outdoor active noise reduction processing module to receive processed noise;
and S800, controlling an outdoor active noise reduction processing module to process the received noise in real time, generating a noise reduction sound wave output signal and transmitting the noise reduction sound wave output signal to an outdoor loudspeaker.
S810, the process returns to step S500 every Δ T2.
Preferably Δ T2 ═ 20 s.
The above-mentioned structure and control method are similar to the structure of the indoor unit 1, and the principle is the same, so the description is omitted.
It should be noted that the above-mentioned embodiments are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention, and those skilled in the art can modify the above-mentioned structure so that the present invention can be applied to more specific application scenarios without departing from the principle of the present invention.
For example, the indoor sound collector 11 and the outdoor sound collector 21 are microphones, but may be other electrical elements or components that can collect sound volume; the indoor speaker 12 and the outdoor speaker 22 are low-frequency HIFI speakers, but may be other general speakers or other devices that can transmit only low-frequency sound waves without departing from the principle of the present invention, and thus, all of them will fall within the protection scope of the present invention.
For example, since the indoor filter and the outdoor filter do not need to implement the function of filtering high-frequency sound waves, the indoor filter and the outdoor filter may obviously be all-pass filters, etc., as long as the noise collected by the microphone can be processed into sound waves with the same amplitude and opposite phases of 180 degrees.
Those skilled in the art will appreciate that the above-described garment treatment device may also include other known structures such as a processor, a controller, a memory, etc., wherein the memory includes, but is not limited to, ram, flash, rom, prom, volatile memory, non-volatile memory, serial memory, parallel memory, registers, etc., and the processor includes, but is not limited to, a CPLD/FPGA, a DSP, an ARM processor, a MIPS processor, etc. Such well-known structures are not shown in the drawings in order to not unnecessarily obscure embodiments of the present disclosure.
Although the foregoing embodiments describe the steps in the above sequential order, those skilled in the art will understand that, in order to achieve the effect of the present embodiments, the steps may not be executed in such an order, and may be executed simultaneously (in parallel) or in an inverse order, and these simple variations are within the scope of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. The active noise reduction air conditioner comprises an outdoor unit and an indoor unit, and is characterized in that the indoor unit further comprises an indoor sound collector, an indoor filter, an indoor active noise reduction processing module and an indoor loudspeaker which are sequentially connected, wherein the indoor loudspeaker is a low-frequency loudspeaker.
2. The active noise reduction air conditioner of claim 1, wherein the woofer is a low frequency HIFI sound.
3. The active noise reduction air conditioner of claim 1, wherein the indoor filter is an all-pass filter.
4. The active noise reduction air conditioner of claim 1, wherein the indoor sound collector is a microphone.
5. The active noise reduction air conditioner comprises an outdoor unit and an indoor unit, and is characterized in that the outdoor unit further comprises an outdoor sound collector, an outdoor filter, an outdoor active noise reduction processing module and an outdoor loudspeaker which are sequentially connected, wherein the outdoor loudspeaker is a low-frequency loudspeaker.
6. A control method of an active noise reduction air conditioner comprises an outdoor unit and an indoor unit, and is characterized in that the indoor unit further comprises an indoor sound collector, an indoor filter, an indoor active noise reduction processing module and an indoor loudspeaker which are sequentially connected, the indoor loudspeaker is a low-frequency loudspeaker, and the control method comprises the following steps:
s100, controlling the indoor sound collector to collect noise;
s200, controlling the indoor filter to process noise;
s300, controlling the indoor active noise reduction processing module to receive processed noise;
s400, controlling the indoor active noise reduction processing module to process the received noise in real time, generating a noise reduction sound wave output signal and transmitting the noise reduction sound wave output signal to the indoor loudspeaker.
7. The control method of an active noise reduction air conditioner according to claim 6, wherein after step S400, the control method further comprises:
s410, returning to the step S100 again at intervals of △ T1.
8. A control method of an active noise reduction air conditioner comprises an outdoor unit and an indoor unit, and is characterized in that the outdoor unit further comprises an outdoor sound collector, an outdoor filter, an outdoor active noise reduction processing module and an outdoor loudspeaker which are sequentially connected, the outdoor loudspeaker is a low-frequency loudspeaker, and the control method further comprises the following steps:
s500, controlling the outdoor sound collector to collect noise;
s600, controlling the outdoor filter to process noise;
s700, controlling the outdoor active noise reduction processing module to receive processed noise;
and S800, controlling the outdoor active noise reduction processing module to process the received noise in real time, generating a noise reduction sound wave output signal and transmitting the noise reduction sound wave output signal to the outdoor loudspeaker.
9. The control method of an active noise reduction air conditioner according to claim 8, wherein after step S800, the control method further comprises:
and S810, returning to the step S500 again at intervals of △ T2.
10. The method of claim 9, wherein △ T2 is 20 s.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010140335.9A CN111306614A (en) | 2020-03-03 | 2020-03-03 | Active noise reduction air conditioner and control method thereof |
| PCT/CN2020/111706 WO2021174780A1 (en) | 2020-03-03 | 2020-08-27 | Active noise reduction air conditioner and control method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010140335.9A CN111306614A (en) | 2020-03-03 | 2020-03-03 | Active noise reduction air conditioner and control method thereof |
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| CN111306614A true CN111306614A (en) | 2020-06-19 |
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| CN202010140335.9A Pending CN111306614A (en) | 2020-03-03 | 2020-03-03 | Active noise reduction air conditioner and control method thereof |
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| WO (1) | WO2021174780A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594862A (en) * | 2020-10-29 | 2021-04-02 | 青岛海信日立空调系统有限公司 | Air pipe type air conditioner indoor unit |
| WO2021174780A1 (en) * | 2020-03-03 | 2021-09-10 | 青岛海尔空调器有限总公司 | Active noise reduction air conditioner and control method therefor |
| CN114294776A (en) * | 2022-01-10 | 2022-04-08 | 宁波奥克斯电气股份有限公司 | Active noise reduction control method and device for air conditioner, air conditioner and computer storage medium |
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| CN114294776A (en) * | 2022-01-10 | 2022-04-08 | 宁波奥克斯电气股份有限公司 | Active noise reduction control method and device for air conditioner, air conditioner and computer storage medium |
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| WO2021174780A1 (en) | 2021-09-10 |
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