Air duct assembly and air conditioner indoor unit with same

Abstract

This invention provides an air duct assembly and an indoor air conditioning unit having the same. The air duct assembly includes an air duct component, which includes an air duct wall and an air duct formed by the air duct wall; and a guide pipe disposed on the air duct wall, with a first open end connected to the air duct and a second closed end. This invention solves the problem of excessive noise generated by existing air duct assemblies.

Description

Technical Field

[0001] This invention relates to the field of household appliances, and more specifically, to a duct assembly and an indoor air conditioning unit having therein. Background Technology

[0002] With the development of technology and the improvement of living standards, ordinary air conditioners can no longer meet the needs of users, and air conditioners are beginning to develop towards intelligence and diversification. In common cabinet air conditioners, the air conditioner uses ordinary air supply or vertical air supply to deliver air into the room. However, during the air supply process, noise is generated during the rotation of the centrifugal fan blades in the air duct components, especially the rotating noise generated at the volute tongue, which affects the consumer experience. Summary of the Invention

[0003] The main objective of this invention is to provide a duct assembly and an indoor air conditioning unit having the same, in order to solve the problem of excessive noise generated by duct assemblies in the prior art.

[0004] To achieve the above objectives, according to one aspect of the present invention, a duct assembly is provided, comprising: a duct component including a duct wall and a duct formed by the duct wall; and a guide pipe disposed on the duct wall, wherein a first end of the guide pipe is an open end connected to the duct, and a second end of the guide pipe is a closed end.

[0005] Furthermore, the air duct component also includes a fan; the air inlet of the air duct is connected to the air outlet of the fan; wherein, the guide pipe is set at the air inlet of the air duct.

[0006] Furthermore, the guide pipe is set perpendicular to the duct wall.

[0007] Furthermore, the guide tube is detachably connected to the duct wall; or, the guide tube is integrally formed with the duct wall.

[0008] Furthermore, the air duct assembly also includes: a mounting section, a guide pipe connected to the mounting section, and the mounting section being detachably connected to the air duct wall.

[0009] Furthermore, the duct wall includes a volute and a volute cover, the volute and the volute cover are connected to form an air duct, and the guide pipe is connected to the volute.

[0010] Furthermore, there are multiple guide tubes, which are arranged at intervals.

[0011] Furthermore, the length of the guide tube is L / m; where L=λ / 4, m is the number of guide tubes, and λ is the wavelength of the sound wave.

[0012] Furthermore, the air duct component also includes a fan; the air duct component includes two air ducts, the air inlets of the two air ducts are connected to the air outlets of the fan, the air outlet of one air duct is set to face upwards; the air outlet of the other air duct is set to face downwards; wherein, a guide pipe is provided at the air inlet of each air duct.

[0013] According to another aspect of the present invention, an air conditioning indoor unit is provided, including a duct assembly, wherein the duct assembly is the aforementioned duct assembly.

[0014] The air duct assembly of the present invention includes an air duct component and a guide pipe. The air duct component includes an air duct wall and an air duct enclosed by the air duct wall. The first end of the guide pipe is connected to the air duct wall and communicates with the air duct through an opening on the air duct wall. Based on the principle of sound wave transmission, noise in the air duct component enters the guide pipe from the air duct and is reflected back into the air duct by the closed end of the guide pipe. Sound waves of certain frequencies cancel each other out with sound waves of the same frequency in the air duct due to their opposite phase, thereby achieving the purpose of noise reduction and solving the problem of the air duct assembly generating a large amount of noise. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 An exploded view of the air duct assembly according to the present invention is shown;

[0017] Figure 2 A schematic diagram of the air duct assembly according to the present invention after the air guide tube is installed is shown;

[0018] Figure 3 A schematic diagram of the air duct assembly and its mounting portion according to the present invention is shown;

[0019] Figure 4 A cross-sectional view of the air duct assembly and its mounting portion according to the present invention is shown;

[0020] Figure 5 A theoretical analysis diagram of a quarter-wavelength tube is shown;

[0021] Figure 6 The acoustic wave superposition diagram of the theoretical analysis of a quarter-wavelength tube is shown;

[0022] Figure 7 A partial exploded view of the fan component of the duct assembly of the present invention is shown.

[0023] The above figures include the following reference numerals:

[0024] 10. Duct components; 11. Duct wall; 12. Duct; 13. Opening; 14. Duct inlet; 15. Duct outlet; 16. Volute; 17. Volute cover; 20. Guide pipe; 30. Fan; 40. Mounting part; 50. Main pipe; 60. Side branch pipe; 70. Rubber sleeve; 71. Rubber pad; 72. Motor bracket; 73. Positioning bolts;

[0025] 5. Nut; 6. Fixing clamp; 7. Centrifugal fan blade; 8. Motor nut; 9. Drive motor. Detailed Implementation

[0026] 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.

[0027] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] 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.

[0029] This invention provides an air duct assembly, please refer to... Figures 1 to 4 It includes a duct component 10, including a duct wall 11 and a duct 12 enclosed by the duct wall 11; a guide pipe 20 is disposed on the duct wall 11, the first end of the guide pipe 20 is an open end, the open end is connected to the duct 12, and the second end of the guide pipe 20 is a closed end.

[0030] The air duct assembly of the present invention includes an air duct component 10 and a guide pipe 20. The air duct component 10 includes an air duct wall 11 and an air duct 12 enclosed by the air duct wall 11. The open end of the guide pipe 20 is connected to the air duct 12. Through the principle of sound wave transmission, after the noise in the air duct component 10 enters the guide pipe 20 from the air duct 12, the noise is reflected back into the air duct 12 by the closed end of the guide pipe 20. Some frequency sound waves and the sound waves of the same frequency in the air duct 12 cancel each other out due to their opposite phase, thereby achieving the purpose of noise reduction and solving the problem of the air duct assembly generating a lot of noise.

[0031] It should be noted that the fan 30 in the duct component 10 will generate a large amount of rotational noise during operation. The rotational noise is transmitted to the room through the duct 12, which makes the duct component 10 generate a lot of noise. The guide pipe 20 can reduce this rotational noise. In addition, the guide pipe 20 can not only reduce the rotational noise generated by the fan during operation, but also reduce the noise generated in the duct component 10 due to other reasons, such as the noise radiated to the surroundings when the gas collides with the duct wall 11.

[0032] Specifically, the first end of the guide pipe 20 is connected to the air duct wall 11 and is connected to the air duct 12 through the opening 13 on the air duct wall 11.

[0033] In this embodiment, as Figure 1 As shown, the air duct component 10 also includes a fan 30; the air inlet 14 of the air duct 12 is connected to the fan outlet 30, and the air outlet 15 of the air duct 12 is used for air supply; wherein, the guide pipe 20 is disposed at the air inlet 14. The volute tongue forms the air inlet 14. Compared to placing the guide pipe 20 in other locations, the guide pipe 20 disposed at the air inlet 14 can improve the flow field direction of the fan at the volute tongue during air conditioner operation, thereby improving the rotational noise of the fan at the volute tongue, reducing the noise level at this location, and improving the user experience.

[0034] In practice, the fan 30 is used to supply indoor air to users, but the rotation of the fan 30 will generate rotational noise. The fan outlet is connected to the air inlet 14 of the air duct 12, and the rotational noise will enter the room with the air from the air outlet 15 of the air duct 12. Therefore, by setting the guide pipe 20 at the air inlet 14 of the air duct, the rotational noise generated by the fan 30 is reduced.

[0035] Specifically, the fan 30 is located at the center of the air duct component 10, and its air outlet is connected to the air inlet 14 of the air duct 12, such as... Figure 1 As shown, the air inlet 14 of the air duct is relatively narrow and is located at the circumference of the center circle of the air duct component 10. The air outlet 15 of the air duct is located at the end of the air duct component 10 and has the same width as the end of the air duct component 10, extending from the air inlet 14 to the air outlet 15 (i.e., Figure 1 From the center circle to the top of the air duct component 10, the width of the air duct 12 gradually increases.

[0036] In this embodiment, as Figure 1 As shown, the guide pipe 20 is set perpendicular to the air duct wall 11.

[0037] In practice, the guide pipe 20 is set perpendicular to the air duct wall 11, which further reduces rotational noise.

[0038] In this embodiment, the guide pipe 20 is detachably connected to the duct wall 11. This arrangement facilitates the maintenance and replacement of the guide pipe 20; furthermore, this arrangement is more flexible, as the guide pipe 20 can be disassembled when it is not needed.

[0039] Specifically, such as Figure 1 and Figure 3 As shown, the air duct assembly also includes a mounting part 40, to which the guide pipe 20 is connected, and the mounting part 40 is detachably connected to the air duct wall 11. In specific implementation, the mounting part 40 is provided to enable the guide pipe 20 to be installed on the air duct wall 11, ensuring communication with the air duct 12, thereby eliminating noise; and, by disassembling the mounting part 40, the guide pipe 20 can be disassembled.

[0040] Specifically, the mounting part 40 is connected to the duct wall 11 and at least a portion of the mounting part 40 passes through the opening 13.

[0041] Specifically, the shape of the opening 13 is adapted to the shape of the air inlet 14 of the air duct, and the opening 13 is in Figure 1 and Figure 2 The air inlet 14 of the duct shown extends between its two ends, with the opening 13 surrounding it. Figure 2 The air duct component 10 is centered circularly; and the opening 13 has a certain width in the extending direction of the air duct 12, with at least a portion of the mounting portion 40 having a shape adapted to the opening 13. The extending direction of the air duct 12 is... Figure 2 The up and down directions in the middle.

[0042] Specifically, opening 13 is an arc-shaped strip opening.

[0043] In other embodiments, the guide pipe 20 is integrally formed with the air duct wall 11. This arrangement improves production efficiency and prevents gas overflow, reducing gas loss.

[0044] In this embodiment, as Figure 1 and Figure 2 As shown, the air duct wall 11 includes a volute 16 and a volute cover 17. The volute 16 and the volute cover 17 are connected to form an air duct 12. The guide pipe 20 is connected to the volute 16, and the opening 13 is provided on the volute 16.

[0045] In practice, the volute 16 and the volute cover 17 are connected to form an air duct 12, through which the air generated by the fan 30 can enter the room. The guide pipe 20 is connected to the volute 16 to eliminate noise at the air inlet 14 of the air duct 12 and improve the rotation noise problem of the fan at the volute tongue.

[0046] Specifically, the volute cover 17 has the same shape as the volute 16 and is fitted onto the volute 16, such as... Figure 1As shown, the main body of the air duct 12 is on the volute 16, and the volute cover 17 is only one side wall of the air duct 12. There is a channel space in the middle of the air duct 12, and the air generated by the fan 30 passes through the channel space and is discharged to the room where the user is located.

[0047] Specifically, the volute cover 17 is fixed to the volute 16 with screws, and the fan 30 is also fixed to the volute cover 17 with screws.

[0048] In this embodiment, as Figure 3 As shown, there are multiple guide tubes 20, which are arranged at intervals.

[0049] Specifically, the number of guide tubes 20 is determined by the spatial location of the air duct assembly.

[0050] Optionally, there may be two, three, or four flow guides 20.

[0051] Optionally, the guide tube 20 is a circular tube with a diameter of 2 mm to 5 mm.

[0052] Optionally, the diameter of the guide tube 20 is 3 mm.

[0053] In this embodiment, as Figure 4 As shown, the length of the guide tube 20 is L / m; where L = λ / 4, m is the number of guide tubes 20, and λ is the wavelength of the sound wave. The length of the guide tube 20 is the depth from the first end to the closed end of the guide tube, as shown... Figure 4 As shown.

[0054] In practical implementation, the principle for setting the length of the guide tube 20 is as follows:

[0055] like Figure 5 As shown, the quarter-wavelength tube is a design structure adopted based on acoustic principles to reduce noise in the intake system. It is a closed side branch pipe 60 installed on the main pipe 50. When sound waves enter the side branch pipe 60 from the main pipe 50, the sound waves are reflected back to the main pipe 50 by the closed end. Some frequencies of sound waves cancel each other out with the sound waves of the same frequency in the main pipe due to their opposite phase, thereby achieving the purpose of noise reduction.

[0056] Figure 6 The diagram illustrates the interference principle of a quarter-wavelength tube silencer. Theoretically, a sound wave passing through a small aperture and returning to the aperture opening will superimpose with the original sound wave, thus canceling each other out. The transmission loss of the side branch 60 is calculated using the formula... Calculate, where L is the length (m) of the quarter-wavelength tube (i.e., the 60mm side branch); p is the ratio of the cross-sectional area of ​​the main pipe to the cross-sectional area of ​​the side branch; and λ is the wavelength of the sound wave (m). The length of the side branch... When a = 1, 2, 3, ..., that is, L = λ / 4, 3λ / 4, 5λ / 4, ..., the transmission loss reaches its maximum. When a = 1, the length of the side branch is one-quarter of the wavelength, that is, L = λ / 4, which is the quarter-wavelength tube. The resonant frequency of the quarter-wavelength tube. c is the speed of sound, which is 340 m / s in air.

[0057] The guide tube 20 of this application is designed based on the principle of a quarter-wavelength tube. First, the formula is used... Calculate the frequency of the rotational noise of the fan's drive motor, where Z is the number of blades in the centrifugal fan (30), n is the rotational speed of the drive motor, and i is the harmonic order. Substitute the frequency of the rotational noise into the formula. f0 in the formula λ is calculated; finally, L is calculated according to L = λ / 4; and, due to structural limitations, to avoid interference between the guide tube 20 and other components, multiple guide tubes 20 can be set, and the length of the guide tube 20 is set to L / m. Performance tests were conducted on the implementation with guide tubes 20 and a length of L / m, and the harsh high-frequency noise was reduced, and the sound quality was improved.

[0058] Specifically, Figure 4 It contains 3 guide tubes 20, that is, the length of the guide tube 20 is L / 3.

[0059] In this embodiment, the air duct component 10 also includes a fan 30; the air duct component 10 includes two air ducts 12, which are arranged on opposite sides of the fan 30. The air inlets 14 of the two air ducts 12 are connected to the air outlets of the fan 30. The air outlet 15 of one air duct 12 is set with its opening facing upwards; the air outlet 15 of the other air duct 12 is set with its opening facing downwards; and a guide pipe 20 is provided at each air inlet 14 of the air duct.

[0060] In specific implementation, the air duct component 10 includes two air ducts 12, and the air outlets 15 of the two air ducts 12 open in opposite directions. This arrangement allows the air duct component 10 to discharge air in both the upper and lower directions, achieving the function of discharging air in different directions. Furthermore, the air duct component is equipped with a guide pipe 20 at each air inlet 14, so that the rotational noise cannot be transmitted into the room from either air duct 12, thus achieving a good noise reduction effect.

[0061] Specifically, such as Figure 1 As shown, the air duct component 10 is in the shape of a cuboid, and two air ducts 12 extend to both ends of the cuboid air duct component 10 to form a longer air duct 12.

[0062] In this embodiment, as Figure 7As shown, rubber pads 71 ​​are fitted onto the four positioning bolts 73 on the motor bracket 72, and four rubber sleeves 70 are installed on the four feet of the drive motor 9. The four rubber sleeves 70 are set one-to-one with the four positioning bolts 73. Each rubber sleeve 70 is fitted onto the corresponding positioning bolt 73, and each rubber sleeve 70 is fixedly connected to the motor bracket 72 by the corresponding motor nut 8 screwed onto the positioning bolt 73. That is, the drive motor is fixed to the motor bracket 72 by the four motor nuts 8. The output shaft of the drive motor 9 has a flat part, and the centrifugal fan blade 7 of the fan 30 is installed on the output shaft. The fixing clip 6 with the flat part is clamped onto the centrifugal fan blade 7 by the nut 5 to fix the centrifugal fan blade 7 and the output shaft.

[0063] According to another aspect of the present invention, an air conditioning indoor unit is provided, including an air duct assembly, wherein the air duct assembly is the air duct assembly in the above embodiments.

[0064] The present invention has the following beneficial effects:

[0065] The air duct assembly of the present invention has a guide pipe 20 installed at the air inlet 14 of the two air ducts 12. According to the theoretical analysis of the sound wave transmission principle, by improving the flow field direction of the fan 30 at the volute tongue of the volute 16 during the operation of the indoor unit of the air conditioner, the rotational noise of the fan 30 at the volute tongue of the volute 16 is improved, the value of the rotational noise at this point is reduced, and the user experience is improved.

[0066] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0067] The air duct assembly of the present invention includes an air duct component 10 and a guide pipe 20. The air duct component 10 includes an air duct wall 11 and an air duct 12 enclosed by the air duct wall 11. The first end of the guide pipe 20 is connected to the air duct wall 11 and communicates with the air duct 12 through an opening 13 on the air duct wall 11. Based on the principle of sound wave transmission, after the noise in the air duct component 10 enters the guide pipe 20 from the air duct 12, the noise is reflected back into the air duct 12 through the closed end of the guide pipe 20. Some frequency sound waves and the sound waves of the same frequency in the air duct 12 cancel each other out due to their opposite phase, thereby achieving the purpose of noise reduction and solving the problem of the air duct component generating a large amount of noise.

[0068] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0069] 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.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An air duct assembly, characterized by, include: The air duct component (10) includes an air duct wall (11) and an air duct (12) enclosed by the air duct wall (11). A guide pipe (20) is disposed on the wall (11) of the air duct. The first end of the guide pipe (20) is an open end, which is connected to the air duct (12). The second end of the guide pipe (20) is a closed end. After the noise in the air duct component (10) enters the guide pipe (20) from the air duct (12), the noise is reflected back into the air duct (12) by the closed end of the guide pipe (20) so as to cancel out the sound waves of the same frequency in the air duct (12). The air duct component (10) also includes a fan (30); the air duct inlet (14) of the air duct (12) is connected to the fan outlet of the fan (30); wherein the guide pipe (20) is disposed at the air duct inlet (14); The air duct wall (11) includes a volute (16) and a volute cover (17), the volute (16) and the volute cover (17) are connected to form the air duct (12), and the guide pipe (20) is connected to the volute (16). The air duct component (10) also includes a fan (30); the air duct component (10) includes two air ducts (12), the air inlets (14) of the two air ducts (12) are connected to the fan outlet of the fan (30), the air outlet (15) of one air duct (12) is set with its opening facing upward; the air outlet (15) of the other air duct (12) is set with its opening facing downward; Each of the air inlets (14) of the air duct is provided with a guide pipe (20); the guide pipe (20) is set perpendicular to the air duct wall (11).

2. The air duct assembly of claim 1, wherein, The guide pipe (20) is detachably connected to the air duct wall (11); or, the guide pipe (20) and the air duct wall (11) are integrally formed.

3. The air duct assembly of claim 2, wherein, The air duct assembly also includes: Mounting part (40), the guide pipe (20) is connected to the mounting part (40), and the mounting part (40) is detachably connected to the air duct wall (11).

4. The air duct assembly of any one of claims 1 to 3, wherein, There are multiple guide tubes (20), and the multiple guide tubes (20) are arranged at intervals.

5. The air duct assembly of claim 4, wherein, The length of the guide tube (20) is L / m; where L=λ / 4, m is the number of guide tubes (20), and λ is the wavelength of the sound wave.

6. An indoor unit for an air conditioner, comprising an air duct assembly, characterized in that, The air duct assembly is the air duct assembly according to any one of claims 1 to 5.

Images