Noise reduction assembly, air outlet device and air conditioner indoor unit

Abstract

The utility model provides a kind of noise reduction assembly, air outlet device and air conditioner indoor unit, and noise reduction assembly includes: noise reduction pipe fittings, including the main pipe body and noise reduction shell being connected with each other, main pipe body is enclosed into inflow port, outflow port and the flow-through passage being communicated with inflow port and outflow port, main pipe body is provided with the noise reduction through-hole being communicated with flow-through passage, noise reduction shell is set in the side of main pipe body away from flow-through passage and with the at least part of main pipe body interval arrangement to enclose into noise reduction chamber, to make the airflow in flow-through passage enter into noise reduction chamber through noise reduction through-hole;Wherein, main pipe body and noise reduction shell can be deformed to be set to stretch and contract, to when main pipe body and noise reduction shell are lengthened or shortened, the radial distance between the at least part of main pipe body and noise reduction shell reduces or increases. By the technical scheme provided by the utility model, the technical problem that the noise reduction effect of airflow noise in the prior art is poor can be solved.

Description

Technical Field

[0001] This utility model relates to the technical field of air outlet noise reduction devices, specifically to a noise reduction component, an air outlet device, and an indoor air conditioning unit. Background Technology

[0002] Currently, with increasingly stringent requirements for indoor air quality, household air conditioners with fresh air intake functions are widely used, effectively improving indoor air quality by introducing outdoor fresh air. However, in existing technologies, due to structural and size limitations of the indoor unit, the fan blade size of the fresh air module cannot be too large, and the cross-sectional area of ​​the air intake duct is also limited by wall perforation constraints. Therefore, fresh air modules generally employ higher fan speeds to achieve a certain volume of fresh air.

[0003] However, fresh air modules operating at high speeds generate significant airflow noise during actual operation. Furthermore, the motor speed of the fresh air module needs to be adjusted to adapt the airflow volume according to the required fresh air intake. This adjustment in motor speed results in varying airflow noise levels. Therefore, even with existing technologies using fixed noise-reducing cotton and sound-absorbing materials, the noise reduction effect is insufficient to address the changing airflow noise, leading to poor noise reduction for different airflow noise levels. Utility Model Content

[0004] The main objective of this invention is to provide a noise reduction component, an air outlet device, and an indoor air conditioning unit to solve the technical problem of poor noise reduction effect for changing airflow noise in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a noise reduction component is provided, comprising:

[0006] A noise-reducing pipe fitting includes a main pipe body and a noise-reducing outer shell connected to each other. The main pipe body forms an inlet, an outlet, and a flow channel that communicates with both the inlet and the outlet. The main pipe body is provided with a noise-reducing through hole that communicates with the flow channel. The noise-reducing outer shell is disposed on the side of the main pipe body away from the flow channel and is spaced apart from at least part of the main pipe body to form a noise-reducing cavity, so that the airflow in the flow channel enters the noise-reducing cavity through the noise-reducing through hole.

[0007] Both the main body and the noise-reducing shell are deformably configured to extend and retract, so that when the main body and the noise-reducing shell are extended or shortened, the radial distance between at least a portion of the main body and the noise-reducing shell decreases or increases.

[0008] Furthermore, the wall thickness of the main body is less than or equal to 1 mm; and / or,

[0009] The wall thickness of the noise-reducing shell is less than or equal to 1 mm.

[0010] Furthermore, the noise-reducing housing is an annular housing, which surrounds the wall of the main body on the side away from the flow channel to form an annular noise-reducing cavity.

[0011] Furthermore, the noise reduction fitting also includes:

[0012] A first annular plate and a second annular plate are spaced apart. The two ends of the main tube are connected to the inner rings of the first annular plate and the second annular plate, respectively. The two ends of the noise-reducing outer shell are connected to the outer rings of the first annular plate and the second annular plate, respectively, so that the first annular plate, the second annular plate, the main tube, and the noise-reducing outer shell form the noise-reducing cavity; and / or,

[0013] At least one of the main body and the noise-reducing shell is a bellows.

[0014] Furthermore, the main pipe is a bellows, and the main pipe includes at least two first connecting sections and at least one second connecting section. A second connecting section connects two adjacent first connecting sections. One of the first connecting sections and the second connecting section is a first protruding section and the other is a first recessed section.

[0015] Wherein, at least one of the first connecting segments is provided with the noise reduction through hole; and / or,

[0016] At least one of the second connecting segments is provided with the noise reduction through hole.

[0017] Furthermore, both the main pipe and the noise-reducing shell are corrugated pipes. The main pipe includes at least two first connecting sections and at least one second connecting section, with a second connecting section connecting each adjacent first connecting section. One of the first connecting sections and the second connecting section is a first protruding section, and the other is a first recessed section. The noise-reducing shell includes at least two third connecting sections and at least one fourth connecting section, with a fourth connecting section connecting each adjacent third connecting section. One of the third connecting sections and the fourth connecting section is a second protruding section, and the other is a second recessed section.

[0018] The first protruding segment and the second protruding segment are opposite to each other and spaced apart, and the first recessed segment and the second recessed segment are opposite to each other and spaced apart.

[0019] Furthermore, one end of the main pipe used to form the inlet is connected to the air outlet of the structure to be noise-reduced. The main pipe also includes a connecting portion, which is spaced apart from the end of the main pipe used to form the inlet. The noise reduction component further includes:

[0020] A drive structure, wherein the drive part of the drive structure is movably disposed, and the drive part of the drive structure is drivenly connected to the connecting part to drive the connecting part to move relative to one end of the main body used to form the inlet.

[0021] Furthermore, the noise reduction tube has an initial state and a noise reduction state; when the drive structure is in the initial state, the noise reduction housing is supported on the drive part; when the drive structure is in the noise reduction state, the noise reduction housing and the drive part are spaced apart.

[0022] Furthermore, the driving unit extends along the extending direction of the noise-reducing housing; and / or,

[0023] The driving unit is a rack, and the driving structure also includes a gear that meshes with the rack.

[0024] Furthermore, the noise reduction component also includes a driving structure, wherein the driving part of the driving structure is movably disposed, and the first annular plate is fixedly disposed;

[0025] Wherein, the driving unit is drivingly connected to the second annular plate; or,

[0026] The driving unit is drivenly connected to the main body; or...

[0027] The drive unit is driven to connect with the noise-reducing housing.

[0028] Furthermore, the noise reduction component also includes a connecting pipe having a connection inlet and a connection outlet disposed opposite to each other, the connection outlet being connected to the inlet;

[0029] Wherein, the axis of symmetry of the connecting inlet is inclined at a preset angle or perpendicular to the axis of symmetry of the connecting outlet; and / or,

[0030] One of the connection inlet and the connection outlet is a polygonal opening, and the other of the connection inlet and the connection outlet is a circular opening.

[0031] Furthermore, the noise reduction component also includes:

[0032] Sound-absorbing material is disposed within the noise reduction cavity, and the sound-absorbing material is deformably disposed.

[0033] According to another aspect of the present invention, an air outlet device is provided, the air outlet device comprising:

[0034] The noise reduction components provided above;

[0035] The mounting housing has a mounting cavity, an air inlet, and an air outlet, and the air inlet of the noise reduction component is connected to the air outlet.

[0036] Furthermore, the noise reduction component is the noise reduction component provided above; the air outlet device further includes:

[0037] Both the motor and the fan blade are installed in the mounting cavity, and the motor is driven to drive the fan blade to rotate.

[0038] The control module, in which the drive structure of the noise reduction component and the motor are both connected to the control module via signals, is configured as follows:

[0039] When the power of the motor increases or increases to a predetermined value, the drive structure is controlled to drive the noise reduction tube of the noise reduction component to extend.

[0040] When the power of the motor decreases or decreases to a preset value, the drive structure is controlled to shorten the noise reduction tube.

[0041] Furthermore, the motor has a first power f1, a second power f2, and a third power f3, where f1 < f2 < f3; the noise reduction tube has an initial state and a noise reduction state, and the length of the noise reduction tube in the noise reduction state is less than the length of the noise reduction tube in the initial state; the control module is configured as follows:

[0042] When the motor is at the first power and the second power, the drive structure is controlled to move the noise reduction tube to the initial state;

[0043] When the motor is at the third power, the drive structure is controlled to move the noise reduction tube to the noise reduction state.

[0044] According to another aspect of the present invention, an indoor air conditioning unit is provided, comprising:

[0045] The air outlet device provided above;

[0046] The indoor unit housing, at least a portion of the air outlet device is disposed within the indoor unit housing.

[0047] Furthermore, the air outlet device is a fresh air device, and the indoor unit casing has a heat exchange outlet;

[0048] Wherein, the air outlet of the air outlet device is separated from the heat exchange outlet; or...

[0049] The air outlet of the air outlet device is connected to the heat exchange outlet.

[0050] By applying the technical solution of this utility model, when both the main pipe and the noise-reducing shell are elongated, the radial distance between at least a portion of the main pipe and the noise-reducing shell can be reduced, thereby reducing the thickness of the noise-reducing cavity; when both the main pipe and the noise-reducing shell are shortened, the radial distance between at least a portion of the main pipe and the noise-reducing shell can be increased, thereby increasing the thickness of the noise-reducing cavity. By changing the thickness of the noise-reducing cavity, it is possible to adapt to different noise reduction requirements. The elongation or shortening of the main pipe and the noise-reducing shell can be adjusted under different noise reduction requirements, thereby ensuring that the thickness of the noise-reducing cavity matches the corresponding noise reduction requirement and thus improving the noise reduction effect. The above configuration allows for flexible adjustment of the size of the noise-reducing pipe fitting to adapt to different noise reduction needs. Attached Figure Description

[0051] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0052] Figure 1 A schematic diagram of the structure of an indoor air conditioner unit without noise reduction components provided according to an embodiment of the present invention is shown;

[0053] Figure 2 A side view of an indoor air conditioning unit without noise reduction components, according to an embodiment of the present invention, is shown.

[0054] Figure 3 A schematic diagram of the structure of an indoor air conditioner unit equipped with noise reduction components according to an embodiment of the present invention is shown;

[0055] Figure 4 A schematic diagram of the structure of the noise reduction component provided according to an embodiment of the present invention in a first working state is shown;

[0056] Figure 5 A schematic diagram of the noise reduction component provided according to an embodiment of the present invention in a second working state is shown;

[0057] Figure 6 A schematic diagram of the structure of a noise reduction component provided according to an embodiment of the present invention is shown;

[0058] Figure 7 A cross-sectional view of a noise reduction component provided according to an embodiment of the present invention is shown;

[0059] Figure 8 A schematic diagram showing the dimensional parameters of a noise reduction component provided according to an embodiment of the present invention is shown;

[0060] Figure 9 An exploded view of a noise reduction component provided according to an embodiment of the present invention is shown;

[0061] Figure 10 A comparison diagram is shown showing the effect of noise reduction after noise reduction by the noise reduction component provided according to the embodiment of the present invention and the noise level of direct airflow in the prior art.

[0062] The above figures include the following reference numerals:

[0063] 10. Noise reduction components;

[0064] 11. Noise-reducing pipe fittings;

[0065] 111. Main body; 1111. Inlet; 1112. Outlet; 1113. Flow channel; 1114. Noise reduction through hole;

[0066] 1115. First protruding section; 1116. First recessed section;

[0067] 112. Noise-reducing outer shell;

[0068] 1121. Second protruding section; 1122. Second concave section;

[0069] 113. Noise reduction cavity;

[0070] 114. First annular plate;

[0071] 115. The second annular plate;

[0072] 12. Drive structure; 121. Drive unit; 122. Gear; 123. Drive motor;

[0073] 13. Connecting pipe; 131. Connecting inlet; 132. Connecting outlet;

[0074] 14. Sound-absorbing materials;

[0075] 20. Air outlet device;

[0076] 21. Housing; 211. Mounting cavity; 212. Air inlet; 213. Air outlet;

[0077] 22. Electric motor;

[0078] 23. Wind blades;

[0079] 30. Air conditioner indoor unit;

[0080] 31. Indoor unit casing;

[0081] 311. Heat exchange outlet. Detailed Implementation

[0082] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0083] like Figures 3 to 9 As shown, an embodiment of the present invention provides a noise reduction component 10, which includes a noise reduction tube 11. The noise reduction tube 11 includes a main tube 111 and a noise reduction shell 112 connected to each other. The main tube 111 forms an inlet 1111, an outlet 1112, and a flow channel 1113 that communicates with both the inlet 1111 and the outlet 1112. The main tube 111 is provided with a noise reduction through hole 1114 that communicates with the flow channel 1113. The noise reduction shell 112 is disposed on the side of the main tube 111 away from the flow channel 1113 and is spaced apart from at least part of the main tube 111 to form a noise reduction cavity 113, so that the airflow in the flow channel 1113 enters the noise reduction cavity 113 through the noise reduction through hole 1114. Both the main body 111 and the noise-reducing shell 112 are deformably configured to extend and retract, so that when the main body 111 and the noise-reducing shell 112 are extended or shortened, the radial distance between at least a portion of the main body 111 and the noise-reducing shell 112 decreases or increases.

[0084] With this structural arrangement, when both the main body 111 and the noise-reducing shell 112 are elongated, the radial distance between at least a portion of the main body 111 and the noise-reducing shell 112 can be reduced, thereby reducing the thickness of the noise-reducing cavity 113. When both the main body 111 and the noise-reducing shell 112 are shortened, the radial distance between at least a portion of the main body 111 and the noise-reducing shell 112 can be increased, thereby increasing the thickness of the noise-reducing cavity 113. By changing the thickness of the noise-reducing cavity 113, it can adapt to different noise reduction requirements. Under different noise reduction requirements, the elongation or shortening of the main body 111 and the noise-reducing shell 112 can be adjusted, so that the thickness of the noise-reducing cavity 113 can be adapted to the corresponding noise reduction requirements, thereby improving the noise reduction effect. Specifically, based on the arrangement of the noise reduction through-hole 1114 and the noise reduction cavity 113, when the frequency of the airflow noise requiring noise reduction is higher, the radial distance between at least a portion of the main pipe 111 and the noise reduction outer shell 112 can be reduced, corresponding to the extension of both the main pipe 111 and the noise reduction outer shell 112; when the frequency of the airflow noise requiring noise reduction is lower, the radial distance between at least a portion of the main pipe 111 and the noise reduction outer shell 112 can be increased, corresponding to the shortening of both the main pipe 111 and the noise reduction outer shell 112. A higher frequency of the airflow noise requiring noise reduction indicates a higher demand for noise reduction; a lower frequency indicates a lower demand for noise reduction. Therefore, by using the noise reduction component 10 provided in this embodiment, through the extension and shortening of the main pipe 111 and the noise reduction outer shell 112, it is possible to adapt to the frequency of the corresponding airflow noise requiring noise reduction, thereby facilitating better adaptation to the noise reduction effect for different airflow noises. Therefore, the noise reduction component 10 provided in this embodiment can solve the technical problem of poor noise reduction effect for different airflow noises in the prior art, especially the technical problem that the use of a single noise reduction measure results in poor noise reduction effect for different airflow noises.

[0085] Specifically, the lengthening or shortening of the main pipe 111 and the noise-reducing tube can be adjusted manually. The adjustment process involves manually stretching or shortening the main pipe 111 and the noise-reducing tube. Alternatively, the lengthening or shortening of the main pipe 111 and the noise-reducing tube can be controlled by a control module. The control module adjusts the lengthening or shortening of the main pipe 111 and the noise-reducing tube according to the detected airflow noise level or the rotational speed of the motor 22 driving the airflow, thereby adjusting the radial distance between at least a portion of the main pipe 111 and the noise-reducing housing 112. This more effectively reduces the corresponding airflow noise, improving the noise reduction effect for different types of airflow noise.

[0086] It should be noted that the axial direction of the noise reduction fitting 11 corresponds to the axial direction of the main pipe 111, which is the direction of its length extension. Along the axial direction of the main pipe 111, the inlet 1111 and the outlet 1112 are located at opposite ends of the main pipe 111. The radial direction of the main pipe 111 is perpendicular to its axial direction. The axial direction of the main pipe 111 can be either a straight line or a curve.

[0087] It should also be noted that the radial distance between at least a portion of the main body 111 and the noise reduction shell 112 can also be directly understood as the radial distance of the noise reduction cavity 113.

[0088] Specifically, the noise reduction through hole 1114 is a circular hole with a diameter of d.

[0089] Specifically, the wall thickness of the main body 111 is less than or equal to 1 mm, so that the main body 111 can deform, thereby facilitating the extension and retraction of the main body 111 and adjusting the distance between the main body 111 and the noise reduction shell 112.

[0090] Specifically, the wall thickness of the noise reduction shell 112 is less than or equal to 1 mm, so that the noise reduction shell 112 can deform, thereby facilitating the expansion and contraction of the noise reduction shell 112, and thus facilitating the adjustment of the distance between the main body 111 and the noise reduction shell 112.

[0091] Preferably, the wall thickness of the main tube 111 is less than or equal to 1 mm, and the wall thickness of the noise reduction shell 112 is less than or equal to 1 mm, so that both the tube and the noise reduction shell 112 can deform, thereby facilitating the extension and retraction of the main tube 111 and the noise reduction shell 112, and thus facilitating the adjustment of the distance between the main tube 111 and the noise reduction shell 112.

[0092] In this embodiment, the noise-reducing outer shell 112 is an annular shell, which surrounds the wall of the main body 111 on the side away from the flow channel 1113 to form an annular noise-reducing cavity 113. This structural arrangement effectively ensures that the noise-reducing cavity 113 has sufficient noise-reducing space, thereby improving the noise-reducing effect. Furthermore, this arrangement also facilitates optimization of the structural layout of the noise-reducing outer shell 112 and the main body 111, allowing for better synchronous expansion and contraction of the two structures, ensuring stable and effective adjustment of the radial distance between them.

[0093] Preferably, when the noise-reducing shell 112 and the main tube 111 are stretched or shortened, the noise-reducing cavity 113 has a structure with equal wall thickness, so as to ensure the uniformity of the overall noise reduction effect, thereby facilitating a better improvement in the noise reduction effect on airflow noise.

[0094] Preferably, the noise-reducing housing 112 has a structure with equal inner and outer diameters, and the main body 111 has a structure with equal inner and outer diameters, so as to better form a noise-reducing cavity 113 with equal wall thickness, thereby improving the uniformity of the noise reduction effect.

[0095] Specifically, the noise-reducing tube 11 further includes: a first annular plate 114 and a second annular plate 115 spaced apart; the two ends of the main tube 111 are respectively connected to the inner rings of the first annular plate 114 and the second annular plate 115; and the two ends of the noise-reducing outer shell 112 are respectively connected to the outer rings of the first annular plate 114 and the second annular plate 115, so that the first annular plate 114, the second annular plate 115, the main tube 111, and the noise-reducing outer shell 112 form the noise-reducing cavity 113. This structural arrangement facilitates optimization of the structure and shape of the noise-reducing tube 11, and facilitates the formation of a stable noise-reducing cavity 113. Furthermore, the arrangement of the first annular plate 114 and the second annular plate 115 also facilitates adjustment of the length and thickness of the noise-reducing cavity 113 through operation of the first annular plate 114 and the second annular plate 115, making control operations convenient.

[0096] Specifically, the first annular plate 114 and the second annular plate 115 can be plate-shaped structures that are not easily deformed, and the first annular plate 114 and the second annular plate 115 can be formed into rigid plastic plates by injection molding of plastic materials.

[0097] Specifically, at least one of the main body 111 and the noise-reducing outer shell 112 is a bellows. The bellows structure is simple, easy to extend and retract, and also easy to adjust the thickness of the noise-reducing cavity 113.

[0098] In this embodiment, the main pipe 111 is a bellows, and the main pipe 111 includes at least two first connecting sections and at least one second connecting section. A second connecting section is connected between two adjacent first connecting sections. One of the first connecting sections and the second connecting section is a first protruding section 1115 and the other is a first recessed section 1116.

[0099] Specifically, at least one of the first connecting sections is provided with the noise reduction through hole 1114, so that the airflow located in the flow channel 1113 and located in the first connecting section can enter the noise reduction cavity 113 through the noise reduction through hole 1114, thereby facilitating the noise reduction of the airflow noise at the corresponding first connecting section.

[0100] Specifically, at least one of the second connecting sections is provided with the noise reduction through hole 1114, so that the airflow located in the flow channel 1113 and located in the second connecting section can enter the noise reduction cavity 113 through the noise reduction through hole 1114, thereby facilitating the noise reduction of the airflow at the corresponding second connecting section.

[0101] Preferably, at least one of the first connecting sections is provided with the noise reduction through hole 1114, and at least one of the second connecting sections is provided with the noise reduction through hole 1114. This allows the airflow located in the flow channel 1113 and at the first and second connecting sections to enter the noise reduction cavity 113 through the noise reduction through hole 1114, thereby facilitating the reduction of airflow noise at the corresponding first and second connecting sections, so as to fully reduce the noise in the flow channel 1113 and improve the noise reduction effect.

[0102] Specifically, both the main pipe 111 and the noise-reducing shell 112 are corrugated pipes. The main pipe 111 includes at least two first connecting sections and at least one second connecting section, with a second connecting section connecting each adjacent first connecting section. One of the first connecting sections and the second connecting section is a first protruding section 1115, and the other is a first recessed section 1116. The noise-reducing shell 112 includes at least two third connecting sections and at least one fourth connecting section, with a fourth connecting section connecting each adjacent third connecting section. One of the third connecting sections and the fourth connecting section is a second protruding section 1121, and the other is a second recessed section 1122. The first protruding section 1115 and the second protruding section 1121 are opposite to each other and spaced apart, and the first recessed section 1116 and the second recessed section 1122 are opposite to each other and spaced apart. This structural design ensures that the expansion and contraction of the main body 111 and the noise reduction shell 112 are consistent, so that the change in the radial dimension of the noise reduction cavity 113 is kept as consistent as possible along the axial direction of the main body 111. This facilitates effective noise reduction of the airflow at different axial positions of the main body 111, thus improving the overall noise reduction effect.

[0103] Preferably, the length of the first protruding segment 1115 in the axial direction on the main body 111 is the same as the length of the second protruding segment 1121 in the axial direction on the main body 111, and the length of the first recessed segment 1116 in the axial direction on the main body 111 is the same as the length of the second recessed segment 1122 in the axial direction on the main body 111, so as to better ensure the consistency of the main body 111 and the noise reduction shell 112 during extension and retraction.

[0104] Preferably, the main body 111 and the noise reduction shell 112 are made of the same material to further improve the consistency of the main body 111 and the noise reduction shell 112 during extension and retraction, so as to further improve the noise reduction effect on the airflow at different axial positions of the main body 111.

[0105] In this embodiment, one end of the main pipe 111 that forms the inlet 1111 is connected to the outlet 213 of the structure to be noise-reduced. The main pipe 111 also includes a connecting portion, which is spaced apart from the end of the main pipe 111 that forms the inlet 1111. The noise reduction component 10 further includes a driving structure 12, the driving part 121 of which is movably disposed. The driving part 121 of the driving structure 12 is drivenly connected to the connecting portion to drive the connecting portion to move relative to the end of the main pipe 111 that forms the inlet 1111. With this structural arrangement, the main pipe 111 and the noise reduction shell 112 can be easily extended and retracted by the driving structure 12, thereby facilitating the adjustment of the noise reduction frequency of the noise reduction component 11 and adapting to different airflow noises to improve the noise reduction effect for different airflow noises.

[0106] Specifically, the connecting part of the main body 111 can be a structure at any position on the main body 111.

[0107] In this embodiment, the noise-reducing tube 11 has an initial state and a noise-reducing state. When the driving structure 12 is in the initial state, the noise-reducing shell 112 is supported on the driving part 121. When the driving structure 12 is in the noise-reducing state, the noise-reducing shell 112 and the driving part 121 are spaced apart. This facilitates improved support stability for the noise-reducing shell 112, preventing deformation of the noise-reducing shell 112 and main tube 111 due to unstable support in the initial state. This would lead to poor installation and support stability of the noise-reducing tube 11 in the initial state, and may even affect the stability of subsequent expansion and contraction of the noise-reducing tube 11. When the drive structure 12 is in the noise reduction state, compared with the initial state, the noise reduction tube 11 is elongated, that is, both the main body 111 and the noise reduction shell 112 are elongated. The bottom of the noise reduction shell 112 will rise to a certain extent, so that the noise reduction shell 112 and the drive part 121 are spaced apart. This arrangement also allows the noise reduction shell 112 to have a certain deformation space during the noise reduction process, which can effectively reduce vibration to a certain extent. In addition, the spaced arrangement between the noise reduction shell 112 and the drive part 121 can also avoid excessive transmission of vibration at the noise reduction shell 112 to the drive shell, thereby reducing the increase in noise caused by the noise reduction shell 112 being placed on the drive part 121. Therefore, it is easier to perform noise reduction more effectively and improve the noise reduction effect.

[0108] Specifically, the driving part 121 extends along the extending direction of the noise-reducing housing 112. This ensures that there is a sufficient contact area between the driving part 121 and the noise-reducing housing 112 in the initial state, thereby effectively improving the installation stability of the noise-reducing housing 112 in the initial state.

[0109] Specifically, the drive unit 121 is a rack, and the drive structure 12 further includes a gear 122 that meshes with the rack. The gear 122 and the rack have a simple structure, good drive stability, and can ensure stable drive of the noise reduction tube 11.

[0110] In this embodiment, the noise reduction component 10 further includes a driving structure 12, wherein the driving part 121 of the driving structure 12 is movably disposed, and the first annular plate 114 is fixedly disposed.

[0111] Specifically, the driving unit 121 is driven to connect with the second annular plate 115. In this way, the connection and driving of the rigid second annular plate 115 can facilitate the stable and synchronous stretching or shortening of the main body 111 and the noise reduction shell 112, and ensure that the stretching and contraction of the main body 111 and the noise reduction shell 112 are synchronized and the stretching and contraction lengths are as similar as possible.

[0112] Alternatively, the driving unit 121 is driven to connect with the main body 111 so that the extension and retraction of the main body 111 drives the noise reduction shell 112 to extend and retract, thereby facilitating the adjustment of the size of the noise reduction cavity 113 and adjusting the noise reduction frequency of the noise reduction cavity 113.

[0113] Alternatively, the driving unit 121 is driven to connect with the noise reduction housing 112 so that the main body 111 can be extended and retracted by the extension and retraction of the noise reduction housing 112, thereby facilitating the adjustment of the size of the noise reduction cavity 113 and adjusting the noise reduction frequency of the noise reduction cavity 113.

[0114] Specifically, the first annular plate 114 is fixedly connected to the air outlet 213 of the structure to be noise-reduced, so that the inlet 1111 formed by the first annular plate 114 is connected to the air outlet 213, so that the airflow flowing out of the air outlet 213 enters the inlet 1111.

[0115] In this embodiment, the noise reduction component 10 further includes a connecting pipe 13, which has a connecting inlet 131 and a connecting outlet 132 disposed opposite to each other. The connecting outlet 132 is connected to the inlet 1111. This arrangement facilitates connection between the connecting pipe 13 and the air outlet 213 of the structure to be noise-reduced. Specifically, the air outlet 213 of the structure to be noise-reduced is connected to the connecting inlet 131.

[0116] The axis of symmetry of the connecting inlet 131 is inclined or perpendicular to the axis of symmetry of the connecting outlet 132 at a preset angle. This allows for changes in the direction of the airflow flowing into the connecting inlet 131, enabling flexible reversal of the airflow direction. Specifically, when the airflow from the connecting inlet 131 is directed towards the ceiling, a vertical impact on the ceiling would further increase noise. By making the connecting outlet 132 perpendicular or inclined to the connecting inlet 131, the airflow at the connecting outlet 132 is redirected, preventing it from directly blowing onto the ceiling and thus avoiding further noise increases caused by direct airflow onto the ceiling.

[0117] Specifically, when the noise reduction component 10 is adapted to the wall-mounted air conditioner, the air conditioner is installed on the wall and the outlet direction of the connection outlet 132 is set away from the wall to avoid the fresh air blown out of the connection outlet 132 blowing directly onto the wall. This ensures user comfort and avoids noise caused by fresh air blowing directly onto the wall.

[0118] Specifically, considering the actual air conditioning installation and the characteristics of fresh air supply, the angle of the connection outlet 132 can be between 0° and 30° (downward angle) relative to the horizontal direction. If the angle is upward, it is easy to impact the ceiling and generate other adverse factors such as noise; if the downward angle is too large, such as exceeding 30°, it will also have a certain adverse effect on the structural implementation and air supply effect; therefore, it can be protected by keeping the angle between 0° and 30° relative to the horizontal direction.

[0119] Preferably, when the structure to be noise-reduced is the fresh air device of the indoor unit 30 of the air conditioner, and the air outlet 213 of the fresh air device is vertically upward, the direction of the fresh air outlet can be changed by connecting it with the connecting pipe 13, thereby avoiding the situation of blowing directly onto the indoor wall as much as possible and reducing the noise caused by impact.

[0120] Specifically, one of the connection inlet 131 and the connection outlet 132 is a polygonal opening, and the other of the connection inlet 131 and the connection outlet 132 is a circular opening, so as to facilitate the transition and switching of connection ports of different shapes, facilitate connection, and improve connection adaptability.

[0121] In this embodiment, the noise reduction component 10 further includes a sound-absorbing material 14, which is disposed within the noise reduction cavity 113 and is deformably disposed. This is to further improve the noise reduction effect.

[0122] Specifically, the sound-absorbing material 14 can be a porous material.

[0123] Embodiment 2 of this utility model provides an air outlet device 20, which includes the noise reduction component 10 and the mounting housing 21 provided above. The mounting housing 21 has a mounting cavity 211, an air inlet 212, and an air outlet 213. The air inlet 1111 of the noise reduction component 10 is connected to the air outlet 213. This structural arrangement facilitates effective noise reduction of the fresh air outlet.

[0124] In this embodiment, the noise reduction component 10 is the noise reduction component 10 provided above; the air outlet device 20 further includes: a motor 22, a fan blade 23, and a control module. The motor 22 and the fan blade 23 are both installed in the mounting cavity 211. The motor 22 is driven by the fan blade 23 to drive the fan blade 23 to rotate. The drive structure 12 of the noise reduction component 10 and the motor 22 are both signal-connected to the control module. The control module is configured to: when the power of the motor 22 increases or increases to a predetermined value, control the drive structure 12 to drive the noise reduction tube 11 of the noise reduction component 10 to extend; when the power of the motor 22 decreases or decreases to a preset value, control the drive structure 12 to drive the noise reduction tube 11 to shorten. In this way, it is convenient to flexibly control the length of the noise reduction tube 11 according to the power of the motor 22, thereby realizing the adjustment of the noise reduction frequency of the noise reduction tube 11, thus meeting the noise reduction requirements of different airflows and improving the noise reduction effect.

[0125] Specifically, the motor 22 has a first power f1, a second power f2, and a third power f3, where f1 < f2 < f3; the noise reduction tube 11 has an initial state and a noise reduction state, and the length of the noise reduction tube 11 in the noise reduction state is less than the length of the noise reduction tube 11 in the initial state; the control module is configured to: when the motor 22 is at the first power and the second power, control the drive structure 12 to move the noise reduction tube 11 to the initial state; when the motor 22 is at the third power, control the drive structure 12 to move the noise reduction tube 11 to the noise reduction state. This allows for easy control of the length of the noise reduction tube 11 according to specific power values, thereby adjusting the noise reduction frequency of the noise reduction tube 11 to meet the noise reduction requirements of different airflows and improve the noise reduction effect. The control process is further refined, improving the accuracy of control.

[0126] like Figures 1 to 5 As shown, Embodiment 3 of this utility model provides an air conditioner indoor unit 30, including: the air outlet device 20 provided above and the indoor unit housing 31, wherein at least a portion of the air outlet device 20 is disposed within the indoor unit housing 31.

[0127] Specifically, the air outlet device 20 is a fresh air device, and correspondingly, the air outlet 213 of the air outlet device 20 is a fresh air outlet. The indoor unit casing 31 has a heat exchange outlet 311. The air outlet 213 of the air outlet device 20 and the heat exchange outlet 311 are separated; or, the air outlet 213 of the air outlet device 20 and the heat exchange outlet 311 are connected. This allows for noise reduction of the fresh air directly supplied through the air outlet 213 or the fresh air flowing to the heat exchange outlet 311, improving the noise reduction effect.

[0128] To address the issues of airflow easily impacting walls and excessive noise in existing fresh air systems, the expandable, microporous (noise-reducing through-hole 1114), and multi-porous composite noise-reducing component 10 of this application can effectively solve the above problems, effectively reduce fresh air noise, and improve product comfort. Specific implementation methods are as follows:

[0129] Noise reduction component 10 is installed at the location of the original fresh air outlet, specifically as follows: Figure 3 , 4 As shown, the fresh airflow flows out through the air outlet 213 of the original fresh air device and then enters the noise reduction component 10 of this application, achieving the effect of deflecting the airflow and silencing the noise.

[0130] The noise reduction component 10 includes: a transition section structure (also known as a connecting pipe 13) and a composite noise reduction structure (also known as a noise reduction fitting 11). The transition section deflects the airflow from a vertical direction to a horizontal direction, solving the problem of the original airflow vertically impacting the ceiling, and making full use of the space in the width direction of the prototype (e.g., Figure 3 (As shown). The composite noise reduction structure includes an inner corrugated tube with micropores (also known as the inner tube body), a porous filling material in the middle (also known as the sound-absorbing material 14), and an outer corrugated tube (also known as the noise reduction shell 112). This structure can effectively absorb aerodynamic noise. Considering that the noise reduction structure needs to expand and move in axial space, the inner and outer sides need to be designed as thin-walled (wall thickness ≤ 1mm, flexible engineering material) corrugated structures to facilitate movement and expansion, as shown in the figure. Figure 6 , 7 As shown.

[0131] Sound absorption frequency design: The inner corrugated structure requires a specific microporous structure, which needs to be designed based on the characteristics of the sound source (by collecting the spectrum and confirming the characteristics of the noise source).

[0132]

[0133] Where: C is the air propagation speed (m / s), P is the perforation rate, d is the micropore diameter (mm), t is the inner corrugated pipe wall thickness, and L is the distance from the inner corrugation to the outer corrugation.

[0134] Considering that actual fresh air systems primarily require noise reduction at medium and high fan speeds, let's assume that the main sound source characteristic frequencies are f0 and f1 respectively. 中风 and f 高风 Determine appropriate structural parameters comprehensively, such as: Figure 8 As shown.

[0135]

[0136] In general, f 中风 <f 高风 In other words, L1 > L2. The larger L is, the shorter the working stroke of the ripple segment. That is, L1 corresponds to the first working stroke state (corresponding to the noise reduction component being in the first working state), and L2 corresponds to the second working stroke state (corresponding to the noise reduction component being in the second working state), as detailed below. Figure 4 , Figure 5 As shown.

[0137] Specifically, the telescopic working structure in this application is used to realize telescopic drive, mainly including a drive gear 122 and a rack located below the composite noise reduction structure. The rack needs to be effectively fixed with the outer bellows structure. The rack is driven by the rotation of the drive motor 123 to move back and forth, thereby realizing the front and back extension and shortening effect of the composite noise reduction structure and meeting the noise reduction requirements.

[0138] The corresponding noise reduction process is as follows: based on the above-mentioned structural parameters, the first calibration state corresponds to the medium wind speed operating parameters, and the second calibration state corresponds to the high wind speed parameters; when the fresh air is detected to be operating at the medium wind speed, the noise reduction structure operates to the first working stroke state (the first working stroke corresponding to the first working stroke state is S1); when the fresh air is detected to be operating at the high wind speed, the noise reduction structure operates to the second working stroke state (the second working stroke corresponding to the second working stroke state is S2), thereby achieving a significant noise reduction effect.

[0139] The corresponding practical effect is as follows: Through actual comparison and verification, the noise reduction scheme in this embodiment has a significant noise reduction effect compared to the original prototype. Specifically, for example... Figure 10 As shown.

[0140] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: By designing a novel noise reduction structure at the fresh air outlet, it can be rationally designed according to different fan speeds, significantly reducing the noise of the fresh air fan and adapting to airflow noise at different speeds; by providing a connecting pipe 13 for transition, it can solve the technical problem of noise reflection and noise increase caused by the vertical impact of airflow on the wall surface during actual installation; through internal perforation, porous materials, and a back cavity structure, it can effectively absorb fresh air noise, absorbing aerodynamic noise and reducing the total noise level without affecting airflow; the inner tube body and the noise reduction outer shell 112 form an inner and outer double-layer corrugated structure, filled with porous materials, which can be adjusted according to noise characteristics. By allowing for extension and variation in length, a wider range of sound absorption effects can be achieved, solving the problem of single sound absorption frequency that cannot meet the noise reduction needs of different rotation speeds. The inner wall of the inner tube is provided with noise reduction through holes 1114 (the noise reduction through holes 1114 can also be understood as micropores with small diameters, preferably circular holes with a diameter range of 0.5mm to 4mm). Different perforation rates can be designed according to noise characteristics to achieve sound absorption at specific frequencies, thus solving the problem of single sound absorption frequency that cannot meet the noise reduction needs of different rotation speeds. By driving the gear 122 and rack through the drive motor 123, a composite noise reduction structure is realized. Different length variations in the airflow direction can achieve different sound absorption lengths according to the noise level.

[0141] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0142] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0143] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0144] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0145] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0146] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A noise reduction component, characterized in that, include: The noise reduction pipe fitting (11) includes a main pipe body (111) and a noise reduction shell (112) connected to each other. The main pipe body (111) forms an inlet (1111), an outlet (1112), and a flow channel (1113) that communicates with both the inlet (1111) and the outlet (1112). The main pipe body (111) is provided with a noise reduction through hole (1114) that communicates with the flow channel (1113). The noise reduction shell (112) is disposed on the side of the main pipe body (111) away from the flow channel (1113) and is spaced apart from at least part of the main pipe body (111) to form a noise reduction cavity (113) so that the airflow in the flow channel (1113) enters the noise reduction cavity (113) through the noise reduction through hole (1114). Both the main body (111) and the noise-reducing shell (112) are deformably configured to extend and retract, such that when the main body (111) and the noise-reducing shell (112) are extended or shortened, the radial distance between at least a portion of the main body (111) and the noise-reducing shell (112) decreases or increases.

2. The noise reduction component according to claim 1, characterized in that, The noise reduction housing (112) is an annular housing, and the noise reduction housing (112) is disposed around the wall of the main body (111) on the side away from the flow channel (1113) to form an annular noise reduction cavity (113).

3. The noise reduction component according to claim 2, characterized in that, The noise reduction pipe fitting (11) also includes: A first annular plate (114) and a second annular plate (115) are spaced apart. The two ends of the main tube (111) are respectively connected to the inner rings of the first annular plate (114) and the second annular plate (115). The two ends of the noise-reducing shell (112) are respectively connected to the outer rings of the first annular plate (114) and the second annular plate (115), so that the first annular plate (114), the second annular plate (115), the main tube (111), and the noise-reducing shell (112) form the noise-reducing cavity (113); and / or, At least one of the main body (111) and the noise-reducing shell (112) is a bellows.

4. The noise reduction component according to claim 1, characterized in that, The main body (111) is a bellows. The main body (111) includes at least two first connecting sections and at least one second connecting section. A second connecting section is connected between two adjacent first connecting sections. One of the first connecting sections and the second connecting section is a first protruding section (1115) and the other is a first recessed section (1116). Wherein, at least one of the first connecting segments is provided with the noise reduction through hole (1114); and / or, At least one of the second connecting segments is provided with the noise reduction through hole (1114).

5. The noise reduction component according to claim 1, characterized in that, Both the main tube (111) and the noise-reducing shell (112) are corrugated pipes. The main tube (111) includes at least two first connecting sections and at least one second connecting section. A second connecting section is connected between two adjacent first connecting sections. One of the first connecting sections and the second connecting section is a first protruding section (1115) and the other is a first recessed section (1116). The noise-reducing shell (112) includes at least two third connecting sections and at least one fourth connecting section. A fourth connecting section is connected between two adjacent third connecting sections. One of the third connecting sections and the fourth connecting section is a second protruding section (1121) and the other is a second recessed section (1122). The first protruding segment (1115) and the second protruding segment (1121) are opposite to each other and spaced apart, and the first recessed segment (1116) and the second recessed segment (1122) are opposite to each other and spaced apart.

6. The noise reduction component according to claim 1, characterized in that, One end of the main pipe (111) that forms the inlet (1111) is connected to the outlet (213) of the noise reduction structure. The main pipe (111) also includes a connecting part, which is spaced apart from the end of the main pipe (111) that forms the inlet (1111). The noise reduction component also includes: A drive structure (12) is provided, wherein the drive part (121) of the drive structure (12) is movably provided, and the drive part (121) of the drive structure (12) is driven to be connected to the connecting part so as to drive the connecting part to move relative to one end of the main body (111) that is used to form the inlet (1111).

7. The noise reduction component according to claim 6, characterized in that, The noise reduction tube (11) has an initial state and a noise reduction state; when the drive structure (12) is in the initial state, the noise reduction shell (112) is supported on the drive part (121); when the drive structure (12) is in the noise reduction state, the noise reduction shell (112) and the drive part (121) are spaced apart.

8. The noise reduction component according to claim 7, characterized in that, The drive unit (121) extends along the extending direction of the noise-reducing housing (112); and / or, The drive unit (121) is a rack, and the drive structure (12) also includes a gear (122) that meshes with the rack.

9. The noise reduction component according to claim 3, characterized in that, The noise reduction component also includes a driving structure (12), wherein the driving part (121) of the driving structure (12) is movably disposed, and the first annular plate (114) is fixedly disposed; Wherein, the driving unit (121) is drivenly connected to the second annular plate (115); or, The driving unit (121) is drivenly connected to the main body (111); or, The drive unit (121) is driven to connect with the noise reduction housing (112).

10. The noise reduction component according to claim 1, characterized in that, The noise reduction component also includes a connecting pipe (13), which has a connecting inlet (131) and a connecting outlet (132) arranged opposite to each other, and the connecting outlet (132) is connected to the inlet (1111). Wherein, the axis of symmetry of the connecting inlet (131) is inclined at a preset angle or perpendicular to the axis of symmetry of the connecting outlet (132); and / or, One of the connection inlet (131) and the connection outlet (132) is a polygonal opening, and the other of the connection inlet (131) and the connection outlet (132) is a circular opening.

11. The noise reduction component according to any one of claims 1 to 10, characterized in that, The noise reduction component also includes: Sound-absorbing material (14) is disposed within the noise reduction cavity (113), and the sound-absorbing material (14) is deformably disposed; and / or, The wall thickness of the main body (111) is less than or equal to 1 mm; and / or, The wall thickness of the noise-reducing housing (112) is less than or equal to 1 mm.

12. An air outlet device, characterized in that, The air outlet device includes: The noise reduction component according to any one of claims 1 to 11; The mounting housing (21) has a mounting cavity (211), an air inlet (212) and an air outlet (213), and the air inlet (1111) of the noise reduction component is connected to the air outlet (213).

13. The air outlet device according to claim 12, characterized in that, The noise reduction component is the noise reduction component described in claim 6; the air outlet device further includes: The motor (22) and the fan blade (23) are both installed in the mounting cavity (211). The motor (22) is connected to the fan blade (23) to drive the fan blade (23) to rotate. The control module, wherein the drive structure (12) of the noise reduction component and the motor (22) are both signal-connected to the control module, and the control module is configured as follows: When the power of the motor (22) increases or increases to a predetermined value, the drive structure (12) is controlled to drive the noise reduction tube (11) of the noise reduction component to extend; When the power of the motor (22) decreases or decreases to a preset value, the drive structure (12) is controlled to drive the noise reduction tube (11) to shorten.

14. An indoor unit for an air conditioner, characterized in that, include: The air outlet device as described in claim 12 or 13; The indoor unit housing (31) is at least partially disposed within the indoor unit housing (31).

15. The indoor unit of the air conditioner according to claim 14, characterized in that, The air outlet device is a fresh air device, and the indoor unit casing (31) has a heat exchange outlet (311); In this configuration, the air outlet (213) of the air outlet device is separated from the heat exchange outlet (311); or, The air outlet (213) of the air outlet device is connected to the heat exchange outlet (311).

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