CN112594862A - Air pipe type air conditioner indoor unit - Google Patents
Air pipe type air conditioner indoor unit Download PDFInfo
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- CN112594862A CN112594862A CN202011184172.0A CN202011184172A CN112594862A CN 112594862 A CN112594862 A CN 112594862A CN 202011184172 A CN202011184172 A CN 202011184172A CN 112594862 A CN112594862 A CN 112594862A
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- Prior art keywords
- noise reduction
- loudspeaker
- indoor unit
- active noise
- microphone
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F2013/245—Means for preventing or suppressing noise using resonance
-
- 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)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses an air duct type air conditioner indoor unit, which realizes a noise reduction function through an active noise reduction assembly, wherein the active noise reduction assembly comprises a controller, a loudspeaker and a microphone, the loudspeaker and the microphone are arranged at an air inlet or an air outlet, the controller is respectively communicated with the loudspeaker and the microphone, the controller controls the operation of the loudspeaker through a power amplifier, and the active noise reduction assembly can generate noise reduction sound waves with opposite phases to external noise. When the active noise reduction assembly is in the self-cleaning working mode, the microphone is closed, the controller sends a single-frequency signal to the power amplifier to drive the loudspeaker for the running time T1, and the power of the single-frequency signal is smaller than the rated power of the loudspeaker. Self-cleaning of the loudspeaker is achieved by vibration caused by low-power operation of the loudspeaker, so that the service life of the active noise reduction assembly is prolonged, and the noise reduction effect is improved.
Description
Technical Field
The invention relates to the technical field of air conditioner adjusting equipment, in particular to an air duct type air conditioner indoor unit.
Background
The air duct type air conditioner comprises an indoor unit and an outdoor unit, wherein the indoor unit is connected with the outdoor unit through a pipeline. Compared with the traditional central air conditioner, the air conditioning effect of the air duct type air conditioner is almost the same as that of the central air conditioner, but the air duct type air conditioner is cheaper and is installed in a hidden way, so that the air duct type air conditioner is favored by more and more consumers in recent years.
In order to improve the comfort of users, the reduction of noise generated during the operation of the indoor unit of the duct type air conditioner is a problem that those skilled in the art have been studying. In the prior art, a theoretical research for applying an active noise reduction technology to an air conditioner is available. The active noise reduction technology generates noise reduction sound waves with phases opposite to those of external noise through an active noise reduction system, so that the energy of the noise is neutralized, and the effect of reducing the noise is achieved.
The active noise reduction system mainly comprises a noise acquisition device, a sound production device and a controller, and the noise reduction principle is as follows: the noise acquisition device acquires a sound signal and sends the sound signal to the controller; the controller analyzes and calculates the received sound signal to obtain a control signal with equal amplitude and opposite phase with the noise signal, and the generated control signal is sent to the sound generating device; the sound generating device generates an inverted signal having the same frequency as the noise signal and an opposite phase to the noise signal on the noise transmission path according to the received control signal. The inverted signal and the noise signal are offset, so that the noise signal transmitted to the human ear is effectively reduced, and the noise reduction effect is realized. The noise collecting device generally adopts a microphone, and the sound generating device generally adopts a loudspeaker.
In the prior art, a loudspeaker is usually arranged at an air outlet or an air inlet of an air duct machine, an air conditioner belongs to internal circulation during operation, and small dust floating in indoor air can circulate at the air inlet and the air outlet along with the operation of the air conditioner. In addition, when the air conditioner is used for cooling, the relative humidity of an air outlet of the air conditioner is close to 100%, and moist air filled with dust is particularly easy to accumulate on the surface of an object. For the electroacoustic devices in the active noise reduction system, because the electroacoustic devices are provided with the diaphragm structures, the rigidity and the quality of the diaphragm have decisive influence on the performance of the electroacoustic devices. When dust with humidity is accumulated on the surface of the diaphragm, the rigidity and the mass of the diaphragm are changed, and the performance of an electroacoustic device is changed, so that the stability and the noise reduction effect of the active noise reduction system are influenced. Meanwhile, long-term dust with moisture can corrode the device, and the service life of the device is influenced.
The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.
Disclosure of Invention
Aiming at the problems pointed out in the background technology, the invention provides an air duct type air conditioner indoor unit, which realizes self-cleaning of a loudspeaker by vibration caused by low-power operation of the loudspeaker, thereby prolonging the service life of an active noise reduction assembly and improving the noise reduction effect.
In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:
in some embodiments of the present application, an air duct type air conditioner indoor unit is provided, including:
the shell is provided with an air inlet and an air outlet;
the active noise reduction assembly comprises a controller, a loudspeaker and a microphone, the loudspeaker and the microphone are arranged at the air inlet or the air outlet, the controller is respectively communicated with the loudspeaker and the microphone, the controller controls the operation of the loudspeaker through a power amplifier, and the active noise reduction assembly can generate noise reduction sound waves with opposite phases to external noise;
when the active noise reduction assembly is in a self-cleaning working mode, the microphone is turned off, the controller sends a single-frequency signal to the power amplifier to drive the loudspeaker for a running time T1, and the power of the single-frequency signal is smaller than the rated power of the loudspeaker.
In some embodiments of the present application, the power of the single frequency signal is below 1/4 of the rated power of the speaker.
In some embodiments of the present application, the waveform of the monochromatic signal is a sine wave or a square wave.
In some embodiments of the present application, the single frequency signal has a frequency less than or equal to 20 Hz.
In some embodiments of the present application, the time T1 is 1-60 s.
In some embodiments of the present application, the time T1 is proportional to the turn-off time of the active noise reduction element and the last running time of the active noise reduction element.
In some embodiments of the present application, the self-cleaning operation mode is turned off when the interval between two adjacent activations of the active noise reduction element is less than time T2.
In some embodiments of the present application, the active noise reduction assembly enters a noise reduction mode after running the self-cleaning mode.
In some embodiments of the present application, the microphone is wrapped with a windproof ball.
In some embodiments of the present application, the speaker includes a cone and a dust cover, the speaker is disposed in the housing, and the cone and the dust cover are exposed from the housing.
Compared with the prior art, the invention has the advantages and positive effects that:
the utility model discloses air duct type air conditioning indoor set realizes falling the function of making an uproar through the subassembly of making an uproar that falls in the initiative. When the active noise reduction assembly is in the self-cleaning working mode, the microphone is closed, the controller sends a single-frequency signal to the power amplifier to drive the loudspeaker for the running time T1, and the power of the single-frequency signal is smaller than the rated power of the loudspeaker. Self-cleaning of the loudspeaker is achieved by vibration caused by low-power operation of the loudspeaker, so that the service life of the active noise reduction assembly is prolonged, and the noise reduction effect is improved.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a structural principle of an active noise reduction assembly according to an embodiment;
FIG. 2 is a first schematic structural diagram of a loudspeaker according to an embodiment;
fig. 3 is a schematic structural diagram ii of a speaker according to the embodiment.
Reference numerals:
10-loudspeaker, 11-cone, 12-dust-proof cover, 13-shell;
20-a microphone, which is connected with the microphone,
30-a controller;
40-power amplifier.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The utility model provides an air duct type air conditioner indoor unit includes the casing, is equipped with air intake and air outlet on the casing, is equipped with fan and indoor heat exchanger in the casing, and the fan provides power for the gas flow in the indoor unit, and the air flows out through the air outlet again after the heat transfer of indoor heat exchanger in the air intake gets into the casing to realize air temperature's regulation.
The indoor unit comprises an active noise reduction assembly, and the active noise reduction assembly can generate noise reduction sound waves opposite to the phase of external noise so as to achieve the effect of reducing the noise and improve the use experience of the air duct type air conditioner.
Referring to fig. 1, the active noise reduction assembly includes a controller 30, a speaker 10, and a microphone 20, the speaker 10 and the microphone 20 are disposed at an air inlet or an air outlet, the controller 30 is in communication with the speaker 10 and the microphone 20, respectively, and the controller 30 controls the operation of the speaker 10 through a power amplifier 40. The active noise reduction assembly can generate noise reduction sound waves opposite in phase to external noise.
Specifically, the microphone 20 collects a sound signal and sends the sound signal to the controller 30; the controller 30 analyzes and calculates the received sound signal to obtain a control signal with equal amplitude and opposite phase with the noise signal, and the generated control signal is sent to the loudspeaker 10; the speaker 10 emits an inverted signal having the same frequency as the noise signal and an opposite phase to the noise signal on the noise transmission path in response to the received control signal. The inverted signal and the noise signal are offset, so that the noise signal transmitted to the human ear is effectively reduced, and the noise reduction effect is realized.
Since the main noise of the air conditioner in operation is the airflow noise caused by the fan, and the airflow noise at the air outlet is the largest, in some embodiments, the speaker 10 and the microphone 20 are disposed at the air outlet.
Self-cleaning of active noise reduction assemblies in the present application specifically includes self-cleaning of speaker 10 and self-cleaning of microphone 20.
Fig. 2 and 3 are schematic structural views of a speaker 10 in an embodiment, where the speaker 10 includes a cone 11, a dust cover 12, and the like, and sound emitted from the speaker 10 flows out from an opening of the cone 11 through the dust cover 12.
The loudspeaker 10 is arranged in the casing 13, and the main components of the loudspeaker 10 are all positioned in the casing 13, and only part of the cone 11 and the dust cover 12 are exposed. The shell 13 is of a closed structure, so that dust and water vapor are prevented from entering the shell to damage the built-in loudspeaker 10, and the dustproof and waterproof effects of the loudspeaker 10 are improved.
Since the cone 11 and the dust cover 12 in the speaker 10 are exposed to the outlet, it is necessary to consider cleaning the cone 11 and the dust cover 12.
The active noise reduction assembly in this application has a self-cleaning working mode, and when the active noise reduction assembly is in the self-cleaning working mode, the microphone 20 is closed, and the controller 30 sends a single-frequency signal to the power amplifier 40 to drive the speaker 10 for the running time T, and the power of the single-frequency signal is less than the rated power of the speaker 10.
Since the power of the single-frequency signal is smaller than the rated power of the speaker 10, when the speaker 10 operates with a smaller power, the moving stroke of the cone 11 of the speaker is very large, the vibration of the speaker 10 itself is higher than the amplitude of the vibration during normal power operation, and the dust accumulated on the surfaces of the cone 11 and the dust cover 12 is shaken off by the large stroke and the high amplitude, so that the purpose of self-cleaning of the speaker 10 is achieved.
In some embodiments of the present application, the power of the single frequency signal is below 1/4 of the rated power of the speaker 10, so as to ensure that the speaker 10 itself can achieve a certain vibration to improve the effect of shaking off dust when the speaker 10 is at low power.
In some embodiments of the present application, the waveform of the monochromatic signal is a sine wave or a square wave.
Because the sound wave frequency that human ear can perceive is 20Hz-20KHz, so in some embodiments of the application, the frequency of the single-frequency signal is set to be less than or equal to 20Hz, so that when the active noise reduction assembly carries out the self-cleaning working mode, no noise is generated, and the use experience of a user is improved.
In some embodiments of the present application, the time T is 1-60s, and the self-cleaning mode of operation is run long enough to ensure the cleaning effect of the speaker.
For the specific setting of the time T, the time T1 is proportional to the turn-off time of the active noise reduction element and the last operation time of the active noise reduction element.
The longer the active noise reduction assembly is turned off and the longer the active noise reduction assembly has been operated last time, indicating that the more dust will fall on the cone 11 and the dust cover 12 during this time, and accordingly, the longer the operation time T of the self-cleaning operation mode should be to ensure the cleaning effect of the speaker 10.
In some embodiments of the present application, the self-cleaning operation mode is turned off when the interval between two adjacent activations of the active noise reduction element is less than the time T2.
For example, when the outdoor unit performs defrosting, the indoor unit needs to be stopped, and at this time, in order to avoid additional noise generated by the continuous operation of the active noise reduction assembly and to improve the service life of the active noise reduction assembly, the active noise reduction assembly is also stopped correspondingly when the indoor unit is stopped. In such a case, the down time of the indoor unit is not typically very long, and the active noise reduction assembly is then stopped briefly accordingly. In this short period of time, the dust accumulated on the speaker 10 (specifically, the cone 11 and the dust cover 12) is very little, so when the defrosting is finished, the indoor unit is turned on, and the active noise reduction assembly is turned on again, the self-cleaning working mode does not need to be turned on next, and the noise reduction effect is further improved.
In some embodiments of the present application, the active noise reduction assembly automatically enters the noise reduction working mode after operating the self-cleaning working mode, so that the seamless connection between the self-cleaning working mode and the noise reduction working mode is realized, and the noise reduction effect is ensured.
The above is the self-cleaning of the speaker in the active noise reduction assembly, and the cleaning of the microphone 20 is briefly described below.
In some embodiments, the microphone 20 may be a microphone with a dust protection rating above IP5, which improves the dust protection capability.
The periphery of the microphone 20 is wrapped with a wind-proof ball to prevent the wind from directly blowing the diaphragm of the microphone 20 to cause noise reduction errors.
The windproof ball is a sponge ball which is communicated with the interior, and the sponge ball has a certain dustproof effect while preventing wind, so that the dustproof capacity of the microphone 20 is improved.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An air duct type air conditioning indoor unit comprising:
the shell is provided with an air inlet and an air outlet;
the active noise reduction assembly comprises a controller, a loudspeaker and a microphone, the loudspeaker and the microphone are arranged at the air inlet or the air outlet, the controller is respectively communicated with the loudspeaker and the microphone, the controller controls the operation of the loudspeaker through a power amplifier, and the active noise reduction assembly can generate noise reduction sound waves with opposite phases to external noise;
the method is characterized in that:
when the active noise reduction assembly is in a self-cleaning working mode, the microphone is turned off, the controller sends a single-frequency signal to the power amplifier to drive the loudspeaker for a running time T1, and the power of the single-frequency signal is smaller than the rated power of the loudspeaker.
2. The indoor unit of an air duct type air conditioner according to claim 1,
the power of the single frequency signal is below 1/4 of the rated power of the loudspeaker.
3. The indoor unit of an air duct type air conditioner according to claim 1,
the wave pattern of the single-frequency signal is a sine wave or a square wave.
4. The indoor unit of an air duct type air conditioner according to claim 1,
the frequency of the single frequency signal is less than or equal to 20 Hz.
5. The indoor unit of an air duct type air conditioner according to claim 1,
the time T1 is 1-60 s.
6. The indoor unit of an air duct type air conditioner according to claim 5,
the time T1 is proportional to the turn-off time of the active noise reduction element and the last operating time of the active noise reduction element.
7. The air duct type air conditioning indoor unit of any one of claims 1 to 6,
when the interval time between two adjacent starting of the active noise reduction assembly is less than the time T2, the self-cleaning working mode is closed.
8. The indoor unit of an air duct type air conditioner according to claim 7,
and the active noise reduction assembly enters a noise reduction working mode after running the self-cleaning working mode.
9. The air duct type air conditioning indoor unit of any one of claims 1 to 6,
the microphone is wrapped with a windproof ball.
10. The air duct type air conditioning indoor unit of any one of claims 1 to 6,
the loudspeaker comprises a cone and a dust cover, the loudspeaker is arranged in the shell, and the cone and the dust cover are exposed out of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011184172.0A CN112594862A (en) | 2020-10-29 | 2020-10-29 | Air pipe type air conditioner indoor unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011184172.0A CN112594862A (en) | 2020-10-29 | 2020-10-29 | Air pipe type air conditioner indoor unit |
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| CN112594862A true CN112594862A (en) | 2021-04-02 |
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| CN202011184172.0A Pending CN112594862A (en) | 2020-10-29 | 2020-10-29 | Air pipe type air conditioner indoor unit |
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| CN111306614A (en) * | 2020-03-03 | 2020-06-19 | 青岛海尔空调器有限总公司 | Active noise reduction air conditioner and control method thereof |
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| JP2003302095A (en) * | 2002-04-05 | 2003-10-24 | Tohoku Kogyo Kk | Sound damper |
| CN2910389Y (en) * | 2006-01-05 | 2007-06-13 | 韩德友 | Low frequency sonic wave cleaner |
| JP2016057010A (en) * | 2014-09-10 | 2016-04-21 | 株式会社ササクラ | Blowout device and suction device for air conditioning facility |
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| CN111536681A (en) * | 2020-04-24 | 2020-08-14 | 青岛海信日立空调***有限公司 | Air conditioner and active noise reduction debugging method |
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Application publication date: 20210402 |