A fresh air component, an air conditioner, and a noise reduction control method

Abstract

This disclosure relates to a fresh air assembly, an air conditioner, and a noise reduction control method. The fresh air assembly includes: a volute having an opening providing a channel for the fresh air assembly to output airflow; a partition located at the opening, dividing the cavity enclosed by the volute into a first receiving cavity and a second receiving cavity; a baffle located within the first receiving cavity, forming a resonant cavity with the partition, the resonant cavity communicating with the second receiving cavity; and a drive module connected to the baffle for driving the baffle to move within the first receiving cavity. The volume of the resonant cavity varies depending on the position of the baffle. This disclosure not only allows for more flexible absorption of noise at the volute opening but also expands the applicable scenarios for noise reduction.

Description

Technical Field

[0001] This disclosure relates to the field of fresh air exchange in air conditioners, and more particularly to a fresh air component, an air conditioner, and a noise reduction control method. Background Technology

[0002] With the continuous development of air conditioning technology, people have increasingly higher requirements for indoor air quality. Air conditioners include fresh air intake systems, which output airflow through these systems to quickly reduce indoor CO2 concentration and improve air freshness. However, due to the large airflow volume of these systems, while improving air freshness, they also generate significant noise. Currently, a volute design is commonly used to reduce noise; however, the noise reduction effect of this design is limited. Summary of the Invention

[0003] To overcome the problems existing in related technologies, this disclosure provides a fresh air component, an air conditioner, and a noise reduction control method, which can not only absorb noise at the opening of the volute more flexibly, but also expand the applicable scenarios for noise reduction.

[0004] In a first aspect, this disclosure provides a fresh air assembly, comprising:

[0005] The volute has an opening that provides a channel for the fresh air assembly to output airflow outward;

[0006] A partition is located at the opening and divides the cavity enclosed by the volute into a first receiving cavity and a second receiving cavity;

[0007] A baffle is located within the first accommodating cavity and forms a resonant cavity with the partition, the resonant cavity being in communication with the second accommodating cavity;

[0008] A drive module, connected to the baffle, is used to drive the baffle to move within the first accommodating cavity;

[0009] The volume of the resonant cavity varies depending on the position of the baffle.

[0010] In some embodiments, the fresh air component further includes:

[0011] A sound acquisition module is located on the inner wall of the volute and is disposed at the opening. It is used to acquire noise signals at the opening so that the baffle can be driven to move by the noise signals.

[0012] In some embodiments, the fresh air component further includes:

[0013] A rack and pinion connects the baffle and the drive module, and is used to move the baffle when the drive module drives the rack and pinion to move.

[0014] In some embodiments, the rack rod has a rack structure on the connecting surface that is connected to the bushing of the drive module;

[0015] The rack structure meshes with the bushing of the drive module.

[0016] In some embodiments, a first through hole is provided on the receiving wall of the first receiving cavity;

[0017] The rack rod passes through the first through hole and is able to move along the first through hole.

[0018] In some embodiments, the partition plate is provided with a plurality of second through holes, and the resonant cavity is connected to the second accommodating cavity through the second through holes.

[0019] A second aspect of this disclosure provides an air conditioner, the air conditioner comprising:

[0020] The fresh air assembly as described in the first aspect above; wherein the centrifugal fan of the fresh air assembly is installed inside the volute of the fresh air assembly;

[0021] A control module, connected to the sound acquisition module and the drive module of the fresh air component, is used to receive noise signals acquired by the sound acquisition module and control the drive module to drive the baffle to move based on the noise signals.

[0022] A third aspect of this disclosure provides a noise reduction control method applied in an air conditioner, the method comprising:

[0023] Detect noise signals at the volute opening of the fresh air component;

[0024] If the target sound pressure level of the noise signal is greater than or equal to the preset sound pressure level, the baffle of the fresh air component is controlled to move based on the noise signal.

[0025] The volume of the resonant cavity of the fresh air component varies depending on the position of the baffle.

[0026] In some embodiments, controlling the movement of the baffle of the fresh air component based on the noise signal includes:

[0027] Based on the noise signal, the target volume of the resonant cavity is determined;

[0028] Based on the target volume of the resonant cavity, the target position of the baffle is determined;

[0029] Move the baffle to the target position.

[0030] In some embodiments, determining the target volume of the resonant cavity based on the noise signal includes:

[0031] Determine the peak frequency of the noise signal;

[0032] The current thickness of the partition of the fresh air component is corrected to obtain the corrected thickness of the partition;

[0033] The target volume of the resonant cavity is determined based on the peak frequency, the total area of ​​the multiple second through holes on the partition, and the corrected thickness.

[0034] In some embodiments, correcting the current thickness of the partition of the fresh air assembly to obtain a corrected thickness of the partition includes:

[0035] Determine the product between the diameter of the second through hole and a preset correction factor;

[0036] The corrected thickness is determined based on the sum of the current thickness and the product.

[0037] In some embodiments, the method further includes:

[0038] If the target sound pressure level of the noise signal is less than the preset sound pressure level, stop controlling the movement of the baffle of the fresh air component.

[0039] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0040] The fresh air assembly of this embodiment includes a volute with an opening providing a channel for the fresh air assembly to output airflow; a partition located at the opening, dividing the cavity enclosed by the volute into a first receiving cavity and a second receiving cavity; a baffle located within the first receiving cavity, forming a resonant cavity with the partition, the resonant cavity communicating with the second receiving cavity; and a drive module connected to the baffle for driving the baffle to move within the first receiving cavity; wherein the volume of the resonant cavity varies depending on the position of the baffle.

[0041] In other words, the fresh air assembly of this disclosure, on the one hand, has a baffle plate at the opening of the volute, so that the resonant cavity formed by the baffle plate and the baffle is located at the opening. The resonant cavity can absorb the noise at the opening of the volute, thereby reducing the noise of the outward airflow. On the other hand, as the baffle moves within the first accommodating cavity, the volume of the resonant cavity can be adjusted by changing the position of the baffle within the first accommodating cavity, thereby changing the noise at the opening and the resonant frequency of the resonant cavity, thus having a wider sound absorption frequency band. This not only allows for more flexible absorption of noise at the opening of the volute but also expands the applicable scenarios for noise reduction. Furthermore, the embodiments of this disclosure can change the volume of the resonant cavity by controlling the flexible movement of the baffle by the drive module, making the noise reduction of the fresh air assembly more intelligent.

[0042] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0044] Figure 1 This is a structural schematic diagram of a cross-section of a volute, as illustrated by an example.

[0045] Figure 2 This is a schematic diagram of the structure of a fresh air assembly according to an exemplary embodiment.

[0046] Figure 3 This is a schematic diagram of the cross-section of a fresh air assembly according to an exemplary embodiment. Figure 1 .

[0047] Figure 4 This is a schematic diagram of the cross-section of a fresh air assembly according to an exemplary embodiment. Figure 2 .

[0048] Figure 5 This is a schematic diagram of the cross-section of a fresh air assembly according to an exemplary embodiment. Figure 3 .

[0049] Figure 6a This is a schematic diagram of the resonant cavity structure of a fresh air assembly according to an exemplary embodiment. Figure 1 .

[0050] Figure 6b This is a schematic diagram of the resonant cavity structure of a fresh air assembly according to an exemplary embodiment. Figure 2 .

[0051] Figure 6c This is a schematic diagram of the side structure of a fresh air assembly according to an exemplary embodiment. Figure 1 .

[0052] Figure 6d This is a schematic diagram of the side structure of a fresh air assembly according to an exemplary embodiment. Figure 2 .

[0053] Figure 6e This is a schematic diagram of the side structure of a fresh air assembly according to an exemplary embodiment. Figure 3 .

[0054] Figure 7 This is a schematic diagram of the cross-section of a fresh air assembly according to an exemplary embodiment. Figure 4 .

[0055] Figure 8 This is an exploded structural diagram of a fresh air assembly according to an exemplary embodiment.

[0056] Figure 9 This is a schematic diagram of the first accommodating cavity structure of a fresh air assembly according to an exemplary embodiment.

[0057] Figure 10 This is a flowchart illustrating a noise reduction control method according to an exemplary embodiment. Figure 1 .

[0058] Figure 11 This is a flowchart illustrating a noise reduction control method according to an exemplary embodiment. Figure 2 . Detailed Implementation

[0059] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0060] like Figure 1 As shown, the existing fresh air components only reduce noise through the profile design of the volute 200 itself. When the output air volume of the fresh air components increases, resulting in high aerodynamic noise from the high-speed airflow impacting the wall of the volute 200, the noise reduction effect is limited. Furthermore, the design of the volute 200 cannot reduce the noise at the airflow outlet.

[0061] Based on this, embodiments of this disclosure provide a fresh air assembly. By adjusting the volume of the resonant cavity at the opening of the fresh air assembly, noise at the opening of the volute can be further reduced through the resonant cavity, building upon the noise reduction achieved by the volute itself. For example... Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the fresh air assembly includes:

[0062] The volute 200 has an opening 201, which provides a channel for the fresh air assembly to output airflow to the outside.

[0063] A partition 300 is located at the opening 201 and divides the cavity enclosed by the volute 200 into a first accommodating cavity 202 and a second accommodating cavity 203.

[0064] A baffle 400 is located in the first accommodating cavity 202 and forms a resonant cavity 204 with the partition 300. The resonant cavity 204 is connected to the second accommodating cavity 203.

[0065] A drive module 500 is connected to the baffle 400 and is used to drive the baffle 400 to move within the first accommodating cavity 202.

[0066] The volume of the resonant cavity 204 varies depending on the position of the baffle 400.

[0067] In this embodiment of the present disclosure, the fresh air assembly includes a centrifugal fan located inside the volute of the fresh air assembly. After the airflow inside the volute is accelerated by the centrifugal fan, the accelerated airflow can be output to the outside of the air conditioner through the opening of the volute, thereby achieving indoor air regulation and ventilation, and improving indoor air quality.

[0068] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the volute 200 may include a first housing 200A and a second housing 200B, which are connected to form a cavity. This connection method may include welding or snap-fitting, and this disclosure does not impose any limitations.

[0069] The aforementioned opening is located at the volute tongue of the volute, thereby reducing the amount of air circulating within the volute and improving the efficiency of airflow exiting the opening. It should be noted that the size of the opening affects the output airflow; when the output air velocity is constant, the output airflow is positively correlated with the opening area. In actual installation, the opening area can be flexibly adjusted according to the actual output airflow; this embodiment does not impose any limitations.

[0070] Here, the shape of the opening can also be set according to actual needs. For example, the shape of the opening can be set to a circle or a square, and this embodiment of the disclosure is not limited thereto.

[0071] In this embodiment, a partition is provided at the opening of the volute, dividing the cavity enclosed by the volute into a first receiving cavity and a second receiving cavity. The second receiving cavity is used to house the centrifugal fan and guide the airflow. Therefore, the shape and size of the second receiving cavity can be set according to the shape and size of the centrifugal fan.

[0072] The volume of the first accommodating cavity is smaller than the volume of the second accommodating cavity, and the volume of the first accommodating cavity is greater than or equal to the volume of the resonant cavity.

[0073] The aforementioned partition can be integrally formed with the volute or connected by a connector, which may include screws or rivets.

[0074] The aforementioned partition can be made of the same material as the volute, such as iron, aluminum, or plastic, and this disclosure does not impose any limitations on the embodiments.

[0075] In this embodiment of the present disclosure, the fresh air assembly may further include a sealing element disposed between the baffle and the volute, for sealing the gap between the baffle and the volute within the first accommodating cavity. Thus, a seal can be achieved between the baffle and the volute during the movement of the baffle. Exemplarily, the sealing element may include a rubber diaphragm, but this embodiment of the present disclosure is not limiting.

[0076] The aforementioned baffle can be parallel to the partition, so that the volume of the resonant cavity can change more uniformly when the baffle is moved.

[0077] In this embodiment of the disclosure, the resonant cavity is connected to the second accommodating cavity. In some embodiments, such as Figure 6a , Figure 6b , Figure 6c , Figure 6d , Figure 6e and Figure 7 As shown, the partition 300 is provided with a plurality of second through holes 301, and the resonant cavity 204 is connected to the second accommodating cavity 203 through the second through holes 301. It should be noted that the distance between any two adjacent second through holes is equal, so that the second through holes are evenly distributed on the partition, thereby enabling better communication between the resonant cavity and the second accommodating cavity.

[0078] In this embodiment of the disclosure, the size of the second through hole can be set according to the thickness of the partition. For example, the diameter of the second through hole can be set to be less than or equal to the thickness of the partition.

[0079] Of course, the shape of the second through hole can be set according to actual needs. For example, the shape of the second through hole may be circular or square, and the embodiments disclosed herein are not limited thereto.

[0080] The aforementioned resonant cavity resonates with noise through multiple second through-holes to achieve sound absorption and noise reduction. When noise at the opening inside the second accommodating cavity is incident on the surface of the partition, if the frequency of the noise is equal to the resonant frequency of the resonant cavity, the air inside and around the second through-hole vibrates in the second through-hole and the resonant cavity behind the second through-hole, generating vibration friction with the inner wall of the second through-hole, thereby generating heat energy, consuming sound energy, and thus absorbing noise of that frequency, achieving noise reduction. Furthermore, in this embodiment of the present disclosure, the volume of the resonant cavity can be adjusted by driving the baffle to move through the driving module, enabling resonance with noise of different frequencies, thereby further broadening the sound absorption frequency band.

[0081] In this embodiment, the driving module is connected to the baffle and is used to drive the baffle to move within the first accommodating cavity. The driving module can drive the baffle to move away from the partition or to move closer to the partition, thus allowing for flexible adjustment of the resonant cavity volume.

[0082] The resonant cavities mentioned above have different volumes, and their resonant frequencies with the noise are different. Therefore, by driving the baffle to move through the drive module, the resonant frequency band can be widened, resulting in a wider range of frequencies for noise absorption.

[0083] For example, the drive module includes a motor, such as a stepper motor, a synchronous motor, or an asynchronous motor, and the embodiments disclosed herein are not limited thereto.

[0084] The fresh air assembly of this embodiment includes a volute with an opening providing a channel for the fresh air assembly to output airflow; a partition located at the opening, dividing the cavity enclosed by the volute into a first receiving cavity and a second receiving cavity; a baffle located within the first receiving cavity, forming a resonant cavity with the partition, the resonant cavity communicating with the second receiving cavity; and a drive module connected to the baffle for driving the baffle to move within the first receiving cavity; wherein the volume of the resonant cavity varies depending on the position of the baffle.

[0085] In other words, the fresh air assembly of this disclosure, on the one hand, has a baffle plate at the opening of the volute, so that the resonant cavity formed by the baffle plate and the baffle is located at the opening. The resonant cavity can absorb the noise at the opening of the volute, thereby reducing the noise of the outward airflow. On the other hand, as the baffle moves within the first accommodating cavity, the volume of the resonant cavity can be adjusted by changing the position of the baffle within the first accommodating cavity, thereby changing the noise at the opening and the resonant frequency of the resonant cavity, thus having a wider sound absorption frequency band. This not only allows for more flexible absorption of noise at the opening of the volute but also expands the applicable scenarios for noise reduction. Furthermore, the embodiments of this disclosure can change the volume of the resonant cavity by controlling the flexible movement of the baffle by the drive module, making the noise reduction of the fresh air assembly more intelligent.

[0086] In some embodiments, such as Figure 2 , Figure 5 , Figure 7 and Figure 8 As shown, the fresh air assembly also includes:

[0087] A sound acquisition module 600 is located on the inner wall of the volute 200 and is disposed at the opening 201. It is used to acquire noise signals at the opening 201 so that the baffle 400 can be moved by the noise signals.

[0088] In this embodiment of the disclosure, the sound acquisition module is disposed at the opening. Further, the sound acquisition module may be located on the receiving wall of the second receiving cavity at the opening.

[0089] It should be noted that there may be one or more sound acquisition modules, and these multiple sound acquisition modules may be arranged at intervals on the receiving walls of the second receiving cavity. For example, when there are two sound acquisition modules, the two sound acquisition modules may be respectively arranged on two receiving walls opposite each other in the second receiving cavity.

[0090] For example, the sound acquisition module includes a microphone, but this disclosure is not limiting.

[0091] The aforementioned sound acquisition module also sends the noise signal, enabling the drive module to flexibly move the drive baffle to change the volume of the resonant cavity through the noise signal. This allows the volume of the resonant cavity to be adjusted in real time according to the noise signal, achieving resonance with noise of different frequencies and thus broadening the sound absorption frequency band.

[0092] In this embodiment of the disclosure, a noise spectrum can be obtained based on the noise signal. The noise frequency contained in the current noise and the sound pressure level corresponding to different noise frequencies can be determined through the noise spectrum. Thus, the target sound pressure level of the current noise and the peak frequency of the current noise can be determined. This allows it to determine whether to drive the baffle to move based on the target sound pressure level of the current noise and to determine the target position of the baffle movement based on the peak frequency of the current noise.

[0093] It should be noted that the larger the volume of the resonant cavity, the lower the resonant frequency. Therefore, the volume range of the resonant cavity needs to be set according to the peak frequency range of the noise signal to achieve the sound absorption effect, and it can be flexibly adjusted in real time according to the peak frequency.

[0094] In some embodiments, such as Figure 5 , Figure 6a and Figure 6b As shown, the fresh air assembly also includes:

[0095] The rack and pinion 700 connects the baffle 400 and the drive module 500, and is used to move the baffle 400 when the drive module 500 drives the rack and pinion 700 to move.

[0096] In this embodiment, the drive module drives the baffle to move by driving the rack and pinion. This allows for a more flexible setting of the drive module's position. For example, the drive module can be set on the receiving wall of the first receiving cavity. This embodiment does not impose any limitations.

[0097] The length of the rack rod can be set according to the maximum distance the baffle moves within the first receiving cavity. For example, the length of the second rack rod can be set to be greater than the maximum distance the baffle moves within the first receiving cavity, thus enabling the baffle to move between the receiving wall and the partition of the first receiving cavity.

[0098] The connection position between the rack and the baffle is not limited in this embodiment. For example, the rack can be connected to the center of the baffle. In this way, when the drive module drives the rack to move the baffle, the tilting movement of the baffle can be reduced, making the movement of the baffle more stable.

[0099] The aforementioned rack and the plane containing the baffle have an angle less than 180 degrees. During the movement of the rack, the direction of movement of the rack can be parallel to the direction of movement of the baffle, making it easier for the rack to move the baffle. This embodiment of the present disclosure is not limited to this.

[0100] In some embodiments, such as Figure 6b As shown, the rack rod 700 has a rack structure 701 on the connecting surface that is connected to the bushing of the drive module 500;

[0101] The rack structure 701 meshes with the bushing of the drive module 500.

[0102] In this embodiment of the disclosure, the drive module is meshed with the rack rod through the bushing of the drive module. During the rotation of the bushing, the drive module can move the rack rod through the bushing.

[0103] The aforementioned rack rod is matched with the bushing, and the rack structure includes teeth and tooth grooves. During the rotation of the bushing, the gear teeth of the bushing sequentially engage with the tooth grooves of the rack structure, and the teeth of the rack structure engage with the gears of the bushing. The rack rod is moved by the friction between the gear teeth and the rack structure.

[0104] The rack structure described above is evenly distributed across the entire connecting surface of the rack rod, allowing the baffle to move within a wider range in the first accommodating cavity, thereby providing a greater adjustment range for the volume of the resonant cavity.

[0105] In some embodiments, such as Figure 6a , Figure 6b , Figure 8 and Figure 9 As shown, a first through hole 205 is provided on the accommodating wall of the first accommodating cavity 202;

[0106] The rack rod 700 passes through the first through hole 205 and is movable along the first through hole 205.

[0107] In this embodiment of the present disclosure, the first through hole can be provided on the cavity wall away from the partition in the first accommodating cavity, so that when the rack rod passes through the first through hole and moves along the first through hole, it can drive the baffle to move along the direction of the rack rod.

[0108] The aforementioned first through hole needs to match the through-section of the rack bar perpendicular to its extension line. During the setting of the first through hole, its shape and size can be determined based on the shape and size of the through-section. For example, the shape of the first through hole can be the same as the shape of the through-section; alternatively, the area of ​​the first through hole can be equal to the area of ​​the through-section of the rack bar. This allows the rack bar to move more smoothly along the first through hole, reducing wobbling during movement.

[0109] This disclosure also provides an air conditioner, the air conditioner comprising:

[0110] The fresh air assembly as described in one or more of the above embodiments; wherein the centrifugal fan of the fresh air assembly is installed inside the volute of the fresh air assembly;

[0111] A control module, connected to the sound acquisition module and the drive module of the fresh air component, is used to receive noise signals acquired by the sound acquisition module and control the drive module to drive the baffle to move based on the noise signals.

[0112] In this embodiment of the disclosure, the centrifugal fan is installed inside the volute of the fresh air assembly. Furthermore, the centrifugal fan can be located in the second accommodating cavity of the volute. By rotating the fan, the outdoor fresh air is accelerated to form a high-speed airflow, converting kinetic energy into potential energy, so as to better deliver the outdoor fresh air into the room and realize air regulation and ventilation.

[0113] It should be noted that during the process of the control module controlling the drive module, the control module acquires the target sound pressure level of the current noise signal. It then uses this target sound pressure level to determine whether to move the baffle, and uses the peak frequency of the current noise to determine the target position of the baffle movement. This allows for better real-time control and adjustment of the resonant cavity volume based on the current noise signal.

[0114] In this embodiment, the air conditioner includes a fresh air assembly as described in one or more of the above embodiments. This fresh air assembly, on one hand, has a baffle plate at the opening of the volute, such that a resonant cavity formed by the baffle plate and the baffle is located at the opening. This resonant cavity absorbs noise from the volute opening, thereby reducing the noise of the outward-output airflow. On the other hand, as the baffle moves within the first accommodating cavity, adjusting its position within the cavity adjusts the volume of the resonant cavity, thereby changing the noise at the opening and the resonant frequency of the cavity. This results in a wider sound absorption band, allowing for more flexible noise absorption from the volute opening and expanding the applicable noise reduction scenarios. Furthermore, this embodiment allows for more intelligent noise reduction of the fresh air assembly by controlling the flexible movement of the baffle by the drive module to change the volume of the resonant cavity.

[0115] This disclosure also provides a noise reduction control method, which is applied in an air conditioner, such as... Figure 10 As shown, the noise reduction control method implemented by this air conditioner includes the following steps:

[0116] S1001. Detect the noise signal at the volute opening of the fresh air component;

[0117] S1002. When the target sound pressure level of the noise signal is greater than or equal to the preset sound pressure level, the baffle of the fresh air component is controlled to move based on the noise signal.

[0118] The volume of the resonant cavity of the fresh air component varies depending on the position of the baffle.

[0119] In this embodiment of the disclosure, the above-mentioned fresh air component may include a sound acquisition module, which detects noise signals at the volute opening of the fresh air component; the air conditioner may include a control module, which acquires the noise signals collected by the sound acquisition module and controls the movement of the baffle of the fresh air component based on the noise signals.

[0120] It should be noted that after determining the target sound pressure level of the noise signal, the target sound pressure level can be compared with a preset sound pressure level. If the target sound pressure level is greater than or equal to the preset sound pressure level, the control module controls the baffle to move. In this way, the baffle movement can be better controlled in real time according to the current noise signal.

[0121] The above-mentioned determination of the target sound pressure level of a noise signal may include: calculating the standard deviation of the current sound pressure level corresponding to different frequencies in the noise spectrum of the noise signal, and using the standard deviation result as the target sound pressure level of the noise signal; or;

[0122] Calculate the mean square error of the current sound pressure level at different frequencies in the noise spectrum corresponding to the noise signal, and use the mean square error result as the target sound pressure level of the noise signal; or;

[0123] Calculate the average value of the current sound pressure level at different frequencies in the noise spectrum corresponding to the noise signal, and use this average value as the target sound pressure level of the noise signal.

[0124] The preset sound pressure level can be set according to the actual situation, for example, it can be set to 50 decibels. This embodiment of the disclosure does not impose any limitation.

[0125] In this embodiment of the disclosure, the fresh air component may include a drive module. During the process of controlling the movement of the baffle of the fresh air component, the drive module can be controlled to drive the baffle to move, so as to adjust the volume of the resonant cavity.

[0126] This embodiment detects noise signals at the opening of the volute of the fresh air assembly. When the target sound pressure level of the noise signal is greater than or equal to a preset sound pressure level, the baffle of the fresh air assembly is controlled to move based on the noise signal. On one hand, noise at the volute opening can be absorbed, thereby reducing the noise of the outward-output airflow. On the other hand, by controlling the baffle movement based on the noise signal, the volume of the resonant cavity can be adjusted, thereby changing the resonant frequency between the noise at the opening and the resonant cavity, resulting in a wider sound absorption bandwidth. This not only allows for more flexible absorption of noise at the volute opening but also expands the applicable scenarios for noise reduction. Furthermore, this embodiment can change the volume of the resonant cavity by controlling the movement of the baffle, making the noise reduction of the fresh air assembly more intelligent.

[0127] In some embodiments, controlling the movement of the baffle of the fresh air component based on the noise signal includes:

[0128] Based on the noise signal, the target volume of the resonant cavity is determined;

[0129] Based on the target volume of the resonant cavity, the target position of the baffle is determined;

[0130] Move the baffle to the target position.

[0131] In this embodiment of the disclosure, the target volume of the resonant cavity can be determined by the correspondence between the noise signal and the volume of the resonant cavity, or by the calculation formula of the target volume. This embodiment of the disclosure does not impose any limitations.

[0132] It should be noted that the larger the volume of the resonant cavity, the smaller the resonant frequency between the resonant cavity and the noise signal. Therefore, by adjusting the volume of the resonant cavity, noise signals of different frequencies can be absorbed.

[0133] The above-mentioned determination of the target position of the baffle movement based on the target volume of the resonant cavity includes: determining the current volume of the resonant cavity; determining the difference between the current volume and the target volume; obtaining the distance between the target position of the baffle movement and the current position based on the difference; and determining the target position of the baffle movement based on the distance.

[0134] In this embodiment of the present disclosure, the number of rotations of the drive module can be determined based on the distance before moving the baffle; during the process of moving the baffle, the baffle can be driven to move based on the number of rotations, so that the baffle can be moved to the target position more accurately.

[0135] The embodiments disclosed herein control the baffle to move to the target position based on the noise signal, thereby adjusting the target volume of the resonant cavity, which enables the resonant cavity to better absorb noise signals of different frequencies.

[0136] In some embodiments, determining the target volume of the resonant cavity based on the noise signal includes:

[0137] Determine the peak frequency of the noise signal;

[0138] The current thickness of the partition of the fresh air component is corrected to obtain the corrected thickness of the partition;

[0139] The target volume of the resonant cavity is determined based on the peak frequency, the total area of ​​the multiple second through holes on the partition, and the corrected thickness.

[0140] In this embodiment of the disclosure, the peak frequency of the noise signal can be obtained from the noise spectrum of the noise signal, and the resonant cavity of the target volume obtained from the peak frequency can absorb the noise corresponding to the peak frequency.

[0141] The peak frequency of the noise signal can be the frequency corresponding to the highest sound pressure level in the noise spectrum of the noise signal.

[0142] In this embodiment, the second through hole and the partition have different acoustic impedances. Considering that the resonant cavity formed by partitions with different acoustic impedances has different noise absorption performance, this embodiment corrects the current thickness of the partition during the calculation of the target volume. Compared with directly determining the target volume based on the current thickness of the partition, this embodiment determines the target volume based on the corrected thickness, which can improve the calculation accuracy of the target volume of the resonant cavity.

[0143] In this embodiment of the disclosure, after determining the peak frequency, the total area of ​​the multiple second through holes on the partition plate, and the corrected thickness, the target volume of the resonant cavity can be calculated using formula (1). Where f is the peak frequency of the noise signal, l is the corrected thickness of the partition plate, S is the total area of ​​the multiple second through holes on the partition plate, V is the target volume of the resonant cavity, and c0 is the speed of sound in air.

[0144]

[0145] In this embodiment of the disclosure, by correcting the current thickness of the partition of the fresh air component to obtain the corrected thickness of the partition, and then determining the target volume based on the corrected thickness, the calculation accuracy of the target volume of the resonant cavity can be improved, thereby further reducing the error between the resonant frequency of the resonant cavity of the target volume and the peak frequency of the noise.

[0146] In some embodiments, correcting the current thickness of the partition of the fresh air assembly to obtain a corrected thickness of the partition includes:

[0147] Determine the product between the diameter of the second through hole and a preset correction factor;

[0148] The corrected thickness is determined based on the sum of the current thickness and the product.

[0149] In this embodiment of the disclosure, the corrected thickness of the partition can be obtained through the correspondence between multiple second through holes and the partition, or it can be calculated through the formula for calculating the corrected thickness of the partition. This embodiment of the disclosure does not impose any limitations.

[0150] In this embodiment, after determining the diameter of the second through hole, the preset correction coefficient, and the thickness of the partition, the corrected thickness of the partition can be calculated using formula (2). Wherein, l is the corrected thickness of the partition, l k d is the thickness of the partition, and d is the diameter of the second through hole; the preset correction coefficient of the partition is set to 0.7.

[0151] l = l k +0.7d (2)

[0152] Here, the corrected thickness of the partition obtained by formula (2) in this embodiment can improve the accuracy of the calculation of the target volume of the resonant cavity.

[0153] In some embodiments, the method further includes:

[0154] If the target sound pressure level of the noise signal is less than the preset sound pressure level, stop controlling the movement of the baffle of the fresh air component.

[0155] In this embodiment of the disclosure, the target sound pressure level of the received noise signal is obtained, and the target sound pressure level is compared with a preset sound pressure level. If the target sound pressure level of the noise signal is less than the preset sound pressure level, the control module stops the movement of the baffle. In this way, the baffle is controlled to move only when the target sound pressure level is greater than or equal to the preset sound pressure level, thereby making the control of the baffle more flexible.

[0156] To better understand the above one or more embodiments, the present disclosure also provides the following examples:

[0157] like Figure 11 As shown, the noise reduction control method for air conditioners may also include the following steps:

[0158] S1101. Detect the noise signal at the volute opening of the fresh air component;

[0159] S1102. Determine whether the target sound pressure level of the noise signal is greater than or equal to the preset sound pressure level; if yes, proceed to step S1103; if no, proceed to step S1104.

[0160] S1103. Determine the target volume of the resonant cavity based on the noise signal;

[0161] S1104. Stop controlling the movement of the baffle of the fresh air component;

[0162] S1105. Based on the target volume of the resonant cavity, determine the target position for the movement of the baffle;

[0163] S1106. Move the baffle to the target position.

[0164] In this embodiment, by controlling the movement of the baffle based on noise signals, the volume of the resonant cavity can be adjusted, thereby changing the noise at the opening and the resonant frequency of the resonant cavity. This results in a wider sound absorption bandwidth, allowing for more flexible absorption of noise at the volute opening and expanding the applicable scenarios for noise reduction. Furthermore, this embodiment allows for more intelligent noise reduction of the fresh air assembly by controlling the movement of the baffle to change the volume of the resonant cavity. Additionally, this embodiment only controls the baffle movement when the target sound pressure level is greater than or equal to a preset sound pressure level, thus enabling more flexible control of the baffle.

[0165] Regarding the methods in the above embodiments, the specific manner in which each unit performs its operations has been described in detail in the embodiments concerning the fresh air component or air conditioner, and will not be elaborated upon here.

[0166] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0167] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A fresh air assembly, characterized in that, include: The volute has an opening that provides a channel for the fresh air assembly to output airflow outward; A partition is located at the opening and divides the cavity enclosed by the volute into a first receiving cavity and a second receiving cavity; A baffle is located within the first accommodating cavity and forms a resonant cavity with the partition, the resonant cavity being connected to the second accommodating cavity; the baffle is parallel to the partition. A drive module, connected to the baffle, is used to drive the baffle to move within the first accommodating cavity; The volume of the resonant cavity varies depending on the position of the baffle. The fresh air component also includes: A sound acquisition module is located on the inner wall of the volute and is disposed at the opening. It is used to acquire noise signals at the opening so that the baffle can be driven to move by the target sound pressure level of the noise signal.

2. The fresh air assembly according to claim 1, characterized in that, The fresh air component also includes: A rack and pinion connects the baffle and the drive module, and is used to move the baffle when the drive module drives the rack and pinion to move.

3. The fresh air assembly according to claim 2, characterized in that, The rack rod has a rack structure on the connecting surface that is connected to the bushing of the drive module; The rack structure meshes with the bushing of the drive module.

4. The fresh air assembly according to claim 2, characterized in that, The first accommodating cavity has a first through hole on its accommodating wall; The rack rod passes through the first through hole and is able to move along the first through hole.

5. The fresh air assembly according to claim 1, characterized in that, The partition plate is provided with a plurality of second through holes, and the resonant cavity is connected to the second accommodating cavity through the second through holes.

6. An air conditioner, characterized in that, The air conditioner includes: The fresh air assembly as described in any one of claims 1 to 5; wherein the centrifugal fan of the fresh air assembly is installed inside the volute of the fresh air assembly; A control module, connected to the sound acquisition module and the drive module of the fresh air component, is used to receive noise signals acquired by the sound acquisition module and control the drive module to drive the baffle to move based on the noise signals.

7. A noise reduction control method, characterized in that, Applied in the air conditioner as described in claim 6, the method includes: Detect noise signals at the volute opening of the fresh air component; If the target sound pressure level of the noise signal is greater than or equal to the preset sound pressure level, the baffle of the fresh air component is controlled to move based on the noise signal. The volume of the resonant cavity of the fresh air component varies depending on the position of the baffle.

8. The method according to claim 7, characterized in that, The step of controlling the movement of the baffle of the fresh air component based on the noise signal includes: Based on the noise signal, the target volume of the resonant cavity is determined; Based on the target volume of the resonant cavity, the target position of the baffle is determined; Move the baffle to the target position.

9. The method according to claim 8, characterized in that, Determining the target volume of the resonant cavity based on the noise signal includes: Determine the peak frequency of the noise signal; The current thickness of the partition of the fresh air component is corrected to obtain the corrected thickness of the partition; The target volume of the resonant cavity is determined based on the peak frequency, the total area of ​​the multiple second through holes on the partition, and the corrected thickness.

10. The method according to claim 9, characterized in that, The process of correcting the current thickness of the partition of the fresh air assembly to obtain the corrected thickness of the partition includes: Determine the product between the diameter of the second through hole and a preset correction factor; The corrected thickness is determined based on the sum of the current thickness and the product.

11. The method according to any one of claims 7 to 10, characterized in that, The method further includes: If the target sound pressure level of the noise signal is less than the preset sound pressure level, stop controlling the movement of the baffle of the fresh air component.

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