CN211823082U

CN211823082U - Air duct machine

Info

Publication number: CN211823082U
Application number: CN202020227020.3U
Authority: CN
Inventors: 王庆杰; 李怀成; 郭树青; 华如文
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2019-07-05
Filing date: 2020-02-28
Publication date: 2020-10-30
Anticipated expiration: 2030-02-28
Also published as: WO2021004167A1; CN111059752A; CN110500762A; CN211695344U; WO2021004166A1; CN111059753A

Abstract

The application discloses tuber pipe machine relates to tuber pipe machine technical field. The problem that the noise of the existing air duct machine is too large, so that the user experience degree and the comfort degree are low is solved. The application provides a tuber pipe machine is equipped with the subassembly of making an uproar of falling in air outlet department, including the controller, and all with noise detection device, the device of making an uproar of falling that the controller is connected, the device of making an uproar of falling is located noise detection device with between the noise error detection device, the controller is used for the basis noise detection device detects tuber pipe machine's first noise signal, control the device of making an uproar of falling is sent the anti-phase place of first noise signal falls the sound of making an uproar.

Description

Air duct machine

Technical Field

The application relates to the technical field of air conditioners, in particular to a noise reduction assembly for an air duct machine and the air duct machine.

Background

With the economic development and the continuous improvement of life quality, an air conditioner becomes a common household appliance, the noise generated in the process of heating and refrigerating by the traditional air conditioner is transmitted to the air, and the daily life of people is seriously influenced, so that a user puts forward higher requirements on the comfort of the air conditioner, and the air conditioner with the noise reduction function is produced.

Disclosure of Invention

The application provides a ducted air conditioner for it is too big to solve current ducted air conditioner noise, leads to the user to use the lower problem of experience degree and comfort level.

To achieve the above object, the present application provides a ducted air conditioner including:

the air conditioner comprises a shell, a fan and a fan, wherein the shell is used for forming a cavity and is provided with an air return opening and an air outlet;

the heat exchanger is arranged in the shell, performs heat exchange with air sucked through the air return opening, and then discharges the air after heat exchange through the air outlet;

the fan is arranged in the shell, and air is introduced from the air return inlet by the fan, passes through the heat exchanger and is sent out from the air outlet;

the air outlet is provided with a noise reduction assembly which can generate noise reduction sound waves.

In some embodiments of the present application, the noise reduction assembly comprises:

the noise detection device can detect noise generated by the operation of the air duct machine when the air duct machine operates;

the noise reduction device can emit noise reduction sound with the phase opposite to that of noise generated by the operation of the air duct machine when the air duct machine operates;

and the controller is used for controlling the noise elimination device to emit noise reduction sound according to the noise generated when the air duct machine operates and detected by the noise detection device.

In some embodiments of the present application, the noise reduction assembly further includes a split housing, the noise detection device is fixed in the end of the split housing with the smaller cross-sectional area, and the noise cancellation device is installed at the end of the split housing with the larger cross-sectional area.

In some embodiments of the present application, the wedge-shaped housing has a plurality of sound holes formed at an end of the wedge-shaped housing having a smaller cross-sectional area.

In some embodiments of the present application, the open area ratio of the end of the split shell having a smaller cross-sectional area ranges from 20% to 50%.

In some embodiments of the present application, the sound-transmitting holes have an opening diameter greater than 2 mm.

In some embodiments of the present application, a first opening is disposed at an end of the split-shaped housing with a larger cross-sectional area, the noise cancellation device is a speaker, and a diaphragm of the noise cancellation device faces an outer side of the split-shaped housing.

In some embodiments of the present application, the noise reduction assembly further includes an acoustic cover, the acoustic cover covers the outer side of the diaphragm of the noise reduction device, and the ends of the acoustic cover and the split-shaped housing with smaller cross-sectional areas are wrapped with a wind-proof, moisture-proof and acoustic material.

In some embodiments of the present application, the controller is mounted within the split housing.

In some embodiments of the present application, the noise reduction assembly further includes a noise error detection device, the noise error detection device can detect noise reduced by the noise reduction device, and the controller can adjust noise reduction sound emitted by the noise reduction device according to the noise detected by the noise error detection device.

In some embodiments of the present application, the noise error detection device is disposed on a grille of the air outlet of the air duct machine.

In some embodiments of the present application, the distance between the noise detection device and the noise cancellation device is 5cm to 30 cm.

In some embodiments of the present application, the noise reduction assembly is disposed at a return air inlet of the ducted air conditioner.

In some embodiments of the present application, the air outlet is provided with an extension section, and the extension section is provided with the noise reduction assembly.

In some embodiments of the present application, the air return opening is provided with an extension section, and the extension section is provided with the noise reduction assembly.

In some embodiments of this application, the extension section inner wall is equipped with inhales the sound cotton, it can be used to absorb to inhale the noise of tuber pipe machine air outlet department.

In some embodiments of the present application, the split enclosure encloses sound absorbing cotton.

The utility model provides a tuber pipe machine, tuber pipe machine include above-mentioned the subassembly of making an uproar that falls that is used for tuber pipe machine, fall the subassembly of making an uproar and include controller, noise detection device, noise elimination device, wherein, noise detection device, noise elimination device all are connected with the controller. The tuber pipe machine can produce the noise at the in-process of operation, noise detection device detects the first noise signal that the tuber pipe machine produced, and feed back the first noise signal that detects to the controller, the controller is according to the first noise signal that noise detection device detected, the signal of making an uproar falls in the anti-phase place that obtains first noise signal, then the signal transmission of making an uproar falls in the anti-phase place that will obtain gives the noise canceling device, the noise canceling device sends the sound of making an uproar falls in the anti-phase place, the sound of making an uproar is mutually offset in first noise signal and the anti-phase place, thereby the noise that the tuber pipe machine produced has been reduced, and then user.

The utility model provides a pair of tuber pipe machine, a plurality of sound-transparent holes have been seted up on the shape of splitting shell of noise reduction subassembly, and the aperture ratio's of the less one end of sectional area scope is 20% ~50% on the shape of splitting shell to the trompil diameter in sound-transparent hole is greater than 2mm, is favorable to improving the noise reduction effect who promotes noise reduction subassembly, and then guarantees the comfort level that is used for.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a ducted air conditioner;

FIG. 2 is a schematic structural diagram of a noise reduction assembly according to an embodiment of the present application;

fig. 3 is a schematic perspective view of an extended air duct in the embodiment of the present application;

FIG. 4 is an exploded view of the wedge-shaped stationary housing, noise canceling device and acoustically transparent cover of the embodiment of the present application;

FIG. 5 is a schematic structural diagram of an extended air duct added in the embodiment of the present application;

FIG. 6 is a partial enlarged view of the portion A in FIG. 5;

FIG. 7 is a schematic structural diagram of noise reduction assemblies disposed at both the air outlet and the air return inlet in the embodiment of the present application;

FIG. 8 is a schematic structural view of a first arrangement of noise reduction assemblies in an embodiment of the present application;

FIG. 9 is a schematic structural view of a second arrangement of noise reduction assemblies in an embodiment of the present application;

FIG. 10 is a schematic structural view of a third arrangement of noise reduction assemblies in an embodiment of the present application;

FIG. 11 is a schematic structural diagram illustrating a fourth arrangement of noise reduction assemblies in an embodiment of the present application;

FIG. 12 is a perspective view of a ducted air conditioner according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of an embodiment of the present application with multiple noise cancellation devices;

FIG. 14 is a schematic perspective view of the noise elimination device disposed on the upper side of the extended duct according to the embodiment of the present application;

FIG. 15 is a schematic structural view of a noise-canceling device disposed on an upper side of an extended duct according to an embodiment of the present invention;

FIG. 16 is a schematic perspective view of the noise-canceling device disposed on the lower side of the extended duct according to the embodiment of the present application;

FIG. 17 is a schematic structural view of a noise-canceling device disposed on the lower side of an extended duct according to an embodiment of the present invention;

FIG. 18 is a schematic view of an embodiment of the present application showing a ducted air conditioner installed in a drop ceiling;

FIG. 19 is a schematic view of an extended portion of an outlet of an air duct machine according to an embodiment of the present disclosure;

FIG. 20 is a schematic diagram of an acoustic mode shape of a rectangular parallelepiped acoustic cavity in an embodiment of the present application;

FIG. 21 is a schematic view of an extended portion of an outlet of an air duct machine according to an embodiment of the present disclosure;

fig. 22 is a schematic structural view of an extended section of an air outlet of an air duct machine according to an embodiment of the present application.

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 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; may be a mechanical connection; 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 terms "central," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings for ease of description and simplicity of description only, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting of 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, "and/or" is only one kind of association relationship describing an associated object, and means that three kinds of relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The ducted air conditioner is a hidden air conditioner, which is also called as an air-conditioning ducted air conditioner or a ducted air conditioner. Because the air duct machine solves the problem that the appearance of the on-hook machine and the cabinet machine is influenced when the on-hook machine and the cabinet machine are exposed outside, the demand is increased.

Referring to fig. 1, a fan 11 is disposed inside a ducted type air conditioner 1, and when the fan 11 is operated, noise generated from the fan 11 and noise generated by air flowing in a ducted type air conditioner pipe 12 are transmitted along the ducted type air conditioner pipe 12, and the noise is transmitted indoors through the ducted type air conditioner pipe 12, thereby affecting quality of life of people.

Referring to fig. 2, an embodiment of the present application provides a ducted air conditioner, including a noise detection device 21, a noise cancellation device 22, a noise error detection device 23, and a controller, where the noise detection device 21, the noise cancellation device 22, and the noise error detection device 23 are all connected to the controller, the noise cancellation device 22 is located between the noise detection device 21 and the noise error detection device 23, and the controller is configured to control the noise cancellation device 22 to emit an anti-phase noise reduction sound of a first noise signal according to the first noise signal of the ducted air conditioner 1 detected by the noise detection device 21; and adjusts the anti-phase noise reduction sound of the first noise signal emitted by the noise elimination device 22 according to the second noise signal of the wind pipe machine 1 after noise reduction detected by the noise error detection device 23.

In some embodiments of the present application, the noise reduction assembly 2 comprises a noise detection device 21, a noise cancellation device 22, a noise error detection device 23, and a controller, wherein the noise detection device 21, the noise cancellation device 22, and the noise error detection device 23 are all connected to the controller. When the ducted air conditioner 100 operates, the noise detection device 21 can detect the operating noise generated by the ducted air conditioner 100 to obtain a first noise signal, and feed the detected first noise signal back to the controller, the controller processes the first noise signal detected by the noise detection device 21 to obtain an anti-phase noise reduction signal of the first noise signal, and then transmits the obtained anti-phase noise reduction signal to the noise elimination device 22, the noise elimination device 22 sends out anti-phase noise reduction sound, the operating noise generated by the ducted air conditioner 100 and the anti-phase noise reduction sound can be mutually offset, and therefore the noise generated by the ducted air conditioner 100 is reduced.

The noise error detection device 23 can detect the operation noise in the ducted air conditioner 100 after the noise reduction, obtain the second noise signal, and feed back the detected second noise signal to the controller, the controller adjusts the anti-phase noise reduction sound of the first noise signal according to the second noise signal, thereby reduce the detection error of the noise detection device 21, and the signal processing error of the controller, make the anti-phase noise reduction signal more match with the first noise signal, further improve the noise reduction effect of the ducted air conditioner 100.

In some embodiments of the present application, the controller of the noise reduction assembly 2 comprises a filter circuit, and the filter circuit can filter the first noise signal detected by the noise detection device 21, so as to obtain an anti-phase noise reduction signal of the first noise signal.

In the present application, there are a variety of ways in which the various components of noise reduction assembly 2 may be secured.

In some embodiments of the present application, the noise reduction assembly 2 further comprises a split-shaped fixing shell 19, the noise detection device 21 is fixed in the end (hereinafter referred to as the front end) of the split-shaped fixing shell 19 with the smaller cross-sectional area, and the noise cancellation device 22 is installed on the end (hereinafter referred to as the rear end) of the split-shaped fixing shell 19 with the larger cross-sectional area, as shown in fig. 3 to 6.

Compared with the scheme that the fixed shell is square, the sectional area of the front end of the split-shaped fixed shell 19 is smaller, the sectional area of the split-shaped fixed shell 19 is gradually increased from the front end to the rear end, when the noise reduction assembly 2 is applied to the wind pipe machine, and the front end of the split-shaped fixed shell 19 is the windward side, after air reaches the front end of the split-shaped fixed shell 19, the resistance of the front end of the split-shaped fixed shell 19 to the air is small, the direction of the air flow cannot be changed greatly, the flow rate of the air is still high, large aerodynamic noise cannot be generated, and the influence on a wind field in the wind pipe machine is small.

In some embodiments of the present application, the split fixing shell 19 is provided with a plurality of sound holes 24 at the front end, so that the operation noise of the ducted air conditioner (such as the noise generated by the fan 11 and the noise generated by the air passing through the heat exchanger 16) can enter the split fixing shell 19; the end with larger sectional area on the wedge-shaped fixed shell 19 is provided with a first opening 25, the noise elimination device 22 is a loudspeaker, a vibrating diaphragm of the noise elimination device 22 faces the outer side of the wedge-shaped fixed shell 19, and the loudspeaker can obtain an anti-phase noise signal from a controller and radiate anti-phase noise reduction sound corresponding to the anti-phase noise signal into the air.

In some embodiments of the present application, the wedge-shaped fixing shell 19 has a plurality of sound holes 24 formed at the front end, and five end surfaces of the front end are all opened.

In some embodiments of the present application, the open cell content is between 20% and 50% and the open cell diameter is greater than 2 mm. Except that the opening is provided to increase sound transmission, sound transmission and moisture-proof materials can be added around the noise reduction component 2, so that the sound transmission effect can be achieved, and the reference microphone can be effectively prevented from being affected with damp.

In some embodiments of the present application, openings are formed at both the upper front end and the larger cross-section end of the split-shaped fixing shell 19, so that the operation noise of the ducted air conditioner can enter the split-shaped fixing shell 19 or the reverse phase noise reduction sound can be transmitted from the split-shaped fixing shell 19.

In some embodiments of the present application, noise reduction assembly 2 further includes an acoustically transparent cover 26, where acoustically transparent cover 26 covers the outside of the diaphragm of noise damping device 22, and where acoustically transparent cover 26 is capable of reducing the direct contact of water vapor in the air with the diaphragm of noise damping device 22.

In some embodiments of the present application, the sound-transmitting cover 26 and the split-shaped fixing shell 19 are wrapped with a wind-proof, moisture-proof and sound-transmitting material, which can further prevent water vapor in the air from entering the noise detection device 21 and the noise elimination device 22, so as to ensure that the noise detection device 21 and the noise elimination device 22 can be used normally in a humid environment.

In some embodiments of the present application, the sound-transmitting holes 24 are formed on each surface of the sound-transmitting cover 26, and the sound emitted from the noise-canceling device 22 is transmitted through the sound-transmitting holes 24 to cancel out the operating noise generated in the ducter 100, thereby reducing the noise.

In some embodiments of the present application, the shape of the housing of the acoustically transparent cover 26 may be square, or split, and the shape of the acoustically transparent cover 26 is not particularly limited herein.

In some embodiments of the present application, the outer shell of the acoustically transparent cover 26 is configured as a split, since the split acoustically transparent cover 26 may reduce the risk of condensation.

In some embodiments of the present application, the wind-proof, moisture-proof and sound-permeable material is any one of melamine foam, olpadiofoam and polyurethane foam, and the above materials all have good comprehensive properties of sound absorption, flame retardancy, heat insulation, humidity and heat stability, etc., so as to ensure that the noise detection device 21 and the noise elimination device 22 can be normally used in a humid environment, and also absorb part of noise generated by the fan 11 and air passing through the heat exchanger 16, thereby further improving the noise reduction effect of the noise reduction assembly 2.

In order to reduce the influence of the noise reduction assembly 2 on the wind field and avoid the controller occupying extra space, in some embodiments of the present application, the controller is installed in the split fixing shell 19 and located between the noise detection device 21 and the noise elimination device 22, and this scheme has another advantage that maintenance and replacement are very convenient, and only the split fixing shell needs to be removed for maintenance or replacement.

Referring to fig. 7, in some embodiments of the present application, there is provided a ducted machine 100, including a housing 13 and the above-described noise reduction assembly 2 for a ducted machine mounted on the housing 13,

the noise reduction components 2 are divided into two groups and are respectively arranged at the air outlet 15 and the air return inlet 14.

Since the ducted air conditioner 100 includes the noise reduction assembly 2 for a ducted air conditioner as described above, the same technical effects can be produced, and the same technical problems can be solved. Therefore, the noise generated by the ducted air conditioner 100 is reduced after passing through the noise reduction assembly 2, so that the noise generated by the ducted air conditioner 100 is further reduced, and the user experience and comfort are improved.

In some embodiments of the present application, the duct machine 100 is configured as shown in fig. 7, and includes a casing 13, a return air inlet 14 is opened on the casing 13, a fan 11 is installed in the casing 13, a noise detection device 21a, a noise cancellation device 22a, and a noise error detection device 23a are all installed between an air inlet side of the fan 11 and the return air inlet 14, the noise detection device 21a is located on a side of the noise cancellation device 22a close to the fan 11, and the noise error detection device 23a is located on a side of the noise cancellation device 22a away from the fan 11.

Because the noise that fan 11 produced partly can be toward the direction propagation of return air inlet 14, set up noise detection device 21a in the one side that noise eliminator 22a is close to fan 11, can detect the noise that fan 11 propagated towards return air inlet 14 direction, set up noise error detection device 23a in the one side that noise eliminator 22a keeps away from fan 11 simultaneously, can make a uproar the noise after making an uproar to tuber pipe machine 100 and carry out the second time detection, obtain the second noise signal, and feed back the second noise signal that detects to the controller, the controller makes an uproar the sound of making an uproar and adjusts in the anti-phase that noise eliminator 22a sent, thereby pneumatic noise before having realized making an uproar and fan 11 make an uproar towards the noise of return air inlet direction propagation.

In some embodiments of the present application, an air outlet 15 is further formed in the casing 13, a fan 11 is installed in the casing 13, a noise detection device 21b, a noise cancellation device 22b and a noise error detection device 23b are all installed between the air outlet side of the fan 11 and the air outlet 15, the noise detection device 21b is located on one side of the noise cancellation device 22b close to the fan 11, and the noise error detection device 23b is located on one side of the noise cancellation device 22b far away from the fan 11, as shown in fig. 7, the noise reduction is performed on the aerodynamic noise behind the fan 11 and the noise propagated by the fan 11 toward the air outlet direction.

Note that "front" refers to a side close to the return air inlet 14, and "rear" refers to a side close to the outlet 15. In some embodiments of the present application, the noise reduction component includes a first noise reduction component 2a and a second noise reduction component 2b, where the first noise reduction component 2a is installed between the air inlet side of the fan 11 and the air return opening 14, and the second noise reduction component 2b is installed between the air outlet side of the fan 11 and the air outlet 15, as shown in fig. 7, that is, the noise reduction components are both disposed at the air return opening 14 and the air outlet 15 of the housing 13, and compared with the case where the noise reduction component is disposed at only one side, the present solution not only can reduce the aerodynamic noise in front of the fan 11 and the noise propagated by the fan 11 toward the air return opening, but also can reduce the aerodynamic noise behind the fan 11 and the noise propagated by the fan 11 toward the air outlet, and the noise reduction effect is better.

Referring to fig. 8, in some embodiments of the present application, the noise detection device 21, the noise cancellation device 22, and the noise error detection device 23 are disposed at intervals. Considering the algorithm delay of the controller, when the distance d between the noise detection device 21 and the noise cancellation device 22 is less than 5cm, the distance d between the noise detection device 21 and the noise cancellation device 22 is too short, the noise cancellation device 22 has not received the anti-phase noise reduction signal sent by the controller and sent the anti-phase noise reduction sound, the noise generated by the fan 11 and the noise of the air passing through the heat exchanger 16 are transmitted to the noise error detection device 23, and active noise reduction cannot be realized; when the distance d between the noise detection device 21 and the noise cancellation device 22 is greater than 30cm, the geometric size of the noise reduction assembly is too large, which may result in failure to be installed in the air duct machine.

In some embodiments of the present application, the distance d between the noise detection device 21 and the noise cancellation device 22 is preferably controlled within a range of 5cm to 30 cm.

In some embodiments of the present application, a heat exchanger 16 is further installed in the housing 13, and the heat exchanger 16 can be installed between the air inlet side of the fan 11 and the air return opening 14, and also can be installed between the air outlet side of the fan 11 and the air outlet 15. In order to achieve different noise reduction effects, the noise reduction assembly 2 has various arrangements with respect to the fan 11 and the heat exchanger 16. Taking the heat exchanger 16 disposed between the air outlet side of the fan 11 and the air outlet 15 as an example, several arrangements of the heat exchanger 16 at different positions relative to the noise reduction assembly 2 are listed below.

The first arrangement scheme is as follows: the heat exchanger 16 is located between the fan 11 and the noise detection device 21, that is, the noise detection device 21 is disposed on the low-pressure side of the heat exchanger, as shown in fig. 8; the noise detection device 21 can detect the noise generated by the fan 11 and the pneumatic noise generated by the heat exchanger 16, and the noise reduction device 22 is used for reducing the noise of the noise generated by the fan 11 and the pneumatic noise generated by the heat exchanger 16, so that a good noise reduction effect is achieved.

The second arrangement scheme is as follows: the heat exchanger 16 is located between the noise detection device 21 and the noise cancellation device 22, as shown in fig. 9; noise detection device 21 can detect the noise that fan 11 produced and the aerodynamic noise before the heat exchanger 16 to fall and make an uproar all fall the noise through noise eliminator 22 to the noise that fan 11 produced and the aerodynamic noise before the heat exchanger 16, obtain better noise reduction effect, reduced the influence of subassembly 2 that falls to making an uproar moreover behind the heat exchanger 16 wind field, be applicable to the lower condition of the aerodynamic noise who produces behind the heat exchanger 16.

The third arrangement is: the heat exchanger 16 is located between the noise cancellation device 22 and the noise error detection device 23, as shown in fig. 10; compared with the second arrangement mode, the noise detection device 21 and the noise elimination device 22 are both moved forward to the high-pressure side of the heat exchanger, and the airflow blown out by the heat exchanger only needs to pass through the noise error detection device 23, so that the influence of the noise reduction assembly 2 on the wind field is further reduced. The noise eliminator 22 may be disposed above the inner wall of the ducted air conditioner duct 12, or the noise eliminator 22 may be disposed below the inner wall of the ducted air conditioner duct 12, and is not particularly limited.

The fourth arrangement is: the noise detection device 21 includes a first noise detection device 21a and a second noise detection device 21b, the second noise detection device 21b is located between the first noise detection device 21a and the noise cancellation device 22, and the heat exchanger 16 is located between the first noise detection device 21a and the second noise detection device 21b, as shown in fig. 11; when the fan 11 is running, the first noise detection device 21a is used for detecting the noise generated by the fan 11 itself, the second noise detection device 21b is used for detecting the noise generated by the air passing through the fan 11 itself and the noise generated by the heat exchanger 16, and the noises detected by the first noise detection device 21a and the second noise detection device 21b are both fed back to the controller, so that the noise generated by the fan 11 itself and the noise generated by the air passing through the heat exchanger 16 can be simultaneously reduced through the noise elimination device 22, the detection result is more accurate, and the noise reduction effect is better.

It should be noted that: the high pressure side of the heat exchanger 16 refers to the side of the heat exchanger 16 close to the fan 11, and the low pressure side of the heat exchanger 16 refers to the side of the heat exchanger 16 away from the fan 11. Of course, for the scheme that the heat exchanger 16 is installed between the air inlet side of the fan 11 and the air return opening 14, the noise detection device 21, the noise cancellation device 22, and the noise error detection device 23 may be symmetrically distributed with the above arrangement, which is not described herein again.

In some embodiments of the present application, in order to achieve a better noise reduction effect, the number of the noise detection devices 21, the noise cancellation devices 22, and the noise error detection devices 23 in the noise reduction assembly 2 may be determined according to the size of the ducted air conditioner and the effect of the noise reduction experiment, and may be one or multiple. Optionally, the number of the noise detection devices 21 may be 2 to 8, the number of the noise cancellation devices 22 may be 2 to 6, and the number of the noise error detection devices 23 may be 2 to 10, or no noise error detection device may be provided; the specific number of the noise detection devices 21, the noise cancellation devices 22, and the noise error detection devices 23 is not particularly limited herein.

In some embodiments of the present application, referring to fig. 12, the length direction of the housing 13 refers to the X direction in fig. 12, the width direction of the housing 13 refers to the Y direction in fig. 12, and the height direction of the housing 13 refers to the Z direction in fig. 12. The plurality of noise dampers 22 may be provided at intervals in the width direction of the housing 13, at intervals in the height direction of the housing 13, or the plurality of noise dampers 22 may be positioned in the same cross section in the X direction and provided at intervals in the circumferential direction around the inner wall of the housing 13. Specifically, as shown in fig. 13, the number n of noise dampers 22 is plural, and the plural noise dampers 22 are provided at intervals along the width direction of the housing 13.

In some embodiments of the present application, compared with the noise elimination device 22, the number of the noise detection devices 21 may be increased, and noise signals in different areas in the housing 13 can be detected, so that the detection result is more accurate, the anti-phase noise reduction signal obtained by the controller is more matched with the first noise signal, and the noise reduction effect is better.

In some embodiments of the present application, the number of noise error detection devices 23 is greater than the number of noise detection devices 21.

In some embodiments of the present application, in order to achieve the noise reduction effect, the noise detection device 21, the noise cancellation device 22, and the noise error detection device 23 in the noise reduction assembly 2 need to be arranged at intervals. For the scheme that the heat exchanger 16 is disposed between the fan 11 and the noise detection device 21, that is, the noise reduction assemblies 2 are both located between the fan 11 and the air outlet 15, the distance between the fan 11 and the air outlet 15 needs to be large, so that the scheme of the above embodiment is only applicable to the duct machine 100 with the large distance between the fan 11 and the air outlet 15.

In some embodiments of the present application, in order to expand the application range of the noise reduction assembly, as shown in fig. 3 to 6, for the duct type air conditioner with a small distance between the fan 11 and the air outlet 15, an extended air duct 18 is installed at the air outlet 15, and the noise detection device 21 and the noise cancellation device 22 are installed on the extended air duct 18.

In some embodiments of the present application, the noise reduction assembly 2 further includes a mounting bracket 27, the mounting bracket 27 connects the noise detection device 21 with the housing 13, as shown in fig. 14 to 15, the mounting bracket 27 has a simpler structure, so that the influence on the wind field of the wind pipe machine is small.

In some embodiments of the present application, to further reduce the effect of the noise reduction assembly 2 on the wind field, as shown in fig. 14-15, the noise cancellation device 22 is fixed on the outside of the housing 13, and the diaphragm of the noise cancellation device 22 is in communication with the inside of the housing 13.

In some embodiments of the present application, the noise cancellation device 22 is disposed on the upper side of the housing 13 with the diaphragm of the noise cancellation device facing downward, as shown in FIGS. 14-15; or the noise elimination device 22 is arranged at the lower side of the shell 13, and the vibrating membrane of the noise elimination device 22 faces upwards, as shown in fig. 16-17; or the noise elimination device 22 is arranged at the left side of the shell 13, and the vibrating membrane of the noise elimination device 22 faces the right; or the noise elimination device 22 is arranged at the right side of the shell 13, and the vibrating membrane of the noise elimination device 22 faces to the left; or there are multiple noise-canceling devices 22, where multiple noise-canceling devices 22 are respectively disposed on any two sides, any three sides, or four sides of the housing 13, and the specific position of the noise-canceling device 22 is not limited as long as the diaphragm of the noise-canceling device 22 faces the inner side of the housing 13 and is in communication with the inner side of the housing 13.

In some embodiments of the present application, in order to implement the installation of the duct machine 100, a ceiling 200 is provided on a ceiling of a room, the whole duct machine housing 13 is installed in the ceiling 200, a ceiling return air inlet 28 corresponding to the housing return air inlet 14 and a ceiling air outlet 29 corresponding to the housing air outlet 15 are provided on the ceiling 200, and grids 17 are installed on the ceiling return air inlet 28 and the ceiling air outlet 29.

In some embodiments of the present application, if the noise reduction assembly 2 is provided with the noise error detection device 23, the noise error detection device 23 is installed at the air outlet 15 of the housing 13; alternatively, the noise error detection device 23 is mounted on the grill 17 of the ceiling outlet 29, as shown in fig. 18.

In some embodiments of the present application, the noise error detection device 23 may also be fixed to the grille 17 of the ceiling outlet 29 by a mounting bracket. To the above-mentioned scheme of fixing noise detection device 21 and noise error detection device 23 in the casing wind channel through the installing support, all wrap up the material of preventing wind, dampproofing and penetrating sound outside noise detection device 21 and noise error detection device 23 to noise detection device 21 and noise error detection device 23 can normal use under the humid environment has been guaranteed.

In some embodiments of the present application, as shown in fig. 3 and 4, an extended air duct 18 is disposed at the air outlet 15 of the duct-type air conditioner 100, a noise reduction assembly 2 is disposed on the extended air duct 18, the noise reduction assembly 3 includes a noise detection device 21, a noise cancellation device 22, and a controller 23, and the noise detection device 21 is located at a smaller end of the noise reduction assembly 3.

In some embodiments of the present application, as shown in FIG. 19, the range of the size of the air duct 18 is extended, and the value of a ranges from 40mm to 400 mm; the value b ranges from 10mm to 2000 mm; c is 50mm to 2000 mm.

In some embodiments of the present application, because the duct type is a pipe type, noise generated by the fan is mainly transmitted toward the air outlet along the pipe, and the pipe acoustic cavity type of the duct type improves feasibility of implementing active noise reduction of the duct type, however, because the frame size of the duct type is large, the whole pipe acoustic cavity still has a complex acoustic cavity mode, complexity of noise transmission and computational difficulty of noise transmission prediction are increased, and noise bandwidth which can be processed by active noise reduction is limited.

In some embodiments of the present application, the acoustic mode shape of the rectangular parallelepiped acoustic cavity shown in fig. 20 may be described by longitudinal, transverse, vertical, or a combination of different directions, for example, the longitudinal first-order modal sound pressure is mainly distributed along the longitudinal direction, and the sound pressure is not changed along other directions, and the acoustic cavity modal frequency may be calculated by the following formula:

the method comprises the following steps that Lx, Ly and Lz are respectively the size of a longitudinal sound cavity, a transverse sound cavity and a vertical sound cavity, c is sound velocity, i (0,1, 2.), j (0,1, 2.), and k (0,1, 2.) respectively represent the order of the modes in three directions, theoretical frequency values of the modes of the sound cavities combined along the longitudinal direction, the transverse direction, the vertical direction or different directions can be obtained through formula calculation, and the frequency values of the modes of the sound cavities can be improved through reduction of the geometric size of the sound cavities.

Based on the theory, the smaller the geometric dimension of the acoustic cavity of the air outlet of the air duct machine is, the simpler the mode of the acoustic cavity is, and the closer the acoustic cavity approaches to the acoustic cavity of the pipeline; and the higher the frequency of the first-order sound cavity mode is, the larger the bandwidth of the frequency band which can be processed by active noise reduction is.

In some embodiments of the present application, as shown in fig. 21, the air duct extension section 18 is divided by the partition plate 30, a noise reduction device is separately disposed in each duct acoustic cavity, and each acoustic cavity may (but need not) share one set of active noise reduction control system, so that the noise reduction effect and noise reduction bandwidth of the active noise reduction system of the ducted air conditioner can be significantly improved.

In some embodiments of the present application, as shown in fig. 21, the air duct extension 18 is not limited to be divided into 3 in fig. 21, or N in fig. 22 (where d is 5mm to 500 mm), and the partition plate 30 may be installed together with the air duct extension 18 as a separate part, or manufactured as one part with the air duct extension 18; in addition, the angles theta 1 to thetan of the partition plate 30 are limited to 0 DEG to 60 deg.

In the description herein, 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 application, but the scope of the present application 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 application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A ducted air conditioner, comprising:

2. The ducted air conditioner of claim 1, wherein: the noise reduction assembly includes:

3. The ducted air conditioner of claim 2, wherein: the noise reduction assembly further comprises a split-shaped shell, the noise detection device is fixed in one end, with a smaller cross-sectional area, of the split-shaped shell, and the noise elimination device is installed at one end, with a larger cross-sectional area, of the split-shaped shell.

4. The ducted air conditioner of claim 3, wherein: and a plurality of sound transmission holes are formed in the end, with the smaller cross section, of the split-shaped shell.

5. The ducted air conditioner of claim 4, wherein: the aperture ratio of the end with the smaller cross-sectional area on the split-shaped shell ranges from 20% to 50%.

6. The ducted air conditioner of claim 4, wherein: the diameter of the opening of the sound transmission hole is larger than 2 mm.

7. The ducted air conditioner of claim 4, wherein: the split-type loudspeaker is characterized in that a first opening is formed in one end, with a larger cross section, of the split-type shell, the noise elimination device is a loudspeaker, and a vibrating diaphragm of the noise elimination device faces the outer side of the split-type shell.

8. The ducted air conditioner of claim 7, wherein: the noise reduction assembly further comprises an acoustic transmission cover, the acoustic transmission cover covers the outer side of the vibrating diaphragm of the noise reduction device, and wind-proof, moisture-proof and acoustic transmission materials are wrapped at the acoustic transmission cover and one end of the split shell, with smaller cross section area.

9. The ducted air conditioner of claim 2, wherein: the noise reduction assembly further comprises a noise error detection device, the noise error detection device can detect noise after noise reduction through the noise reduction device, and the controller can adjust noise reduction sound emitted by the noise reduction device according to the noise detected by the noise error detection device to achieve the effect of noise reduction.

10. A ducted air conditioner according to any one of claims 1-9, wherein: the air outlet is provided with the extension section, be equipped with on the extension section the subassembly of making an uproar falls, the extension section inner wall is equipped with inhales the sound cotton, it can be used to absorb to inhale the sound cotton noise of tuber pipe machine air outlet department.