Noise reduction structure, indoor unit of air conditioner, and air conditioner

Abstract

The present application provides a noise reduction structure, an indoor unit of an air conditioner, and an air conditioner, including a noise reduction chamber. The noise reduction chamber is arranged in an air duct, and a communication channel is arranged on the chamber wall of the noise reduction chamber. The internal space of the noise reduction chamber is communicated with the air duct through the communication channel, so that the fluid in the air duct can flow into the noise reduction chamber. The present application provides a noise reduction structure, an indoor unit of an air conditioner, and an air conditioner, which can effectively reduce the noise value during the operation of the air conditioner and improve the use comfort of users.

Description

Technical Field

[0001] This application belongs to the technical field of air conditioning, and particularly relates to a noise reduction structure, an indoor unit of an air conditioner, and an air conditioner. Background Art

[0002] Due to the improvement of living standards, consumers have higher and higher requirements for the quality of life and comfort. Air conditioners have become essential household appliances, and the noise generated during the operation of air conditioners is an important part affecting comfort. However, there is no effective noise reduction setting in the existing indoor units of air conditioners, and the noise value during the operation of the air conditioner cannot be effectively reduced, which affects the user's comfort. Summary of the Invention

[0003] Therefore, the technical problem to be solved by this application is to provide a noise reduction structure, an indoor unit of an air conditioner, and an air conditioner, which can effectively reduce the noise value during the operation of the air conditioner and improve the user's comfort.

[0004] To solve the above problems, this application provides a noise reduction structure, including a noise reduction cavity. The noise reduction cavity is arranged in the air duct, and a communication channel is arranged on the cavity wall of the noise reduction cavity. The internal space of the noise reduction cavity is connected to the air duct through the communication channel, so that the fluid in the air duct can flow into the noise reduction cavity.

[0005] Optionally, the noise reduction structure includes a noise reduction member, and the noise reduction member is buckled on the inner wall of the air duct to form the noise reduction cavity between the inner wall of the noise reduction member and the inner wall of the air duct.

[0006] Optionally, the noise reduction member includes a diversion section, and the diversion section is arranged at a non-zero angle with the flow direction of the fluid in the air duct, and the communication channel is arranged on the diversion section.

[0007] Optionally, the number of the communication channels is multiple, and the multiple communication channels are uniformly arranged on the cavity wall of the noise reduction cavity.

[0008] Optionally, the diameter of the communication channel is 3-5 mm. When the number of the communication channels is multiple, the distance between the center lines of adjacent communication channels is 30-50 mm.

[0009] Optionally, a pressure relief channel is arranged on the noise reduction cavity. The inlet end of the pressure relief channel is connected to the internal space of the noise reduction cavity, and the outlet end of the pressure relief channel is connected to the external environment of the air duct.

[0010] Optionally, a first pressure relief channel and a second pressure relief channel are arranged on the noise reduction cavity. The first pressure relief channel is arranged on the first side of the noise reduction cavity, and the second pressure relief channel is arranged on the second side of the noise reduction cavity.

[0011] On the other hand of the present application, an indoor unit of an air conditioner is provided, which includes the noise reduction structure as described above.

[0012] Optionally, the indoor unit of the air conditioner includes a bottom case. When the indoor unit of the air conditioner includes a noise reduction member, the noise reduction member is buckled on the bottom case. The noise reduction member further includes a first anti-escape section and a second anti-escape section. The first anti-escape section is arranged on the first side of the noise reduction cavity, and the second anti-escape section is arranged on the second side of the noise reduction cavity. The first anti-escape section and the second anti-escape section extend towards the side away from the bottom case.

[0013] Optionally, the indoor unit of the air conditioner includes a first cross-flow fan and a second cross-flow fan. The first cross-flow fan is arranged at the air inlet of the air duct, and the second cross-flow fan is arranged at the air outlet of the air duct. The noise reduction cavity is arranged between the first cross-flow fan and the second cross-flow fan.

[0014] Optionally, the indoor unit of the air conditioner further includes a heat exchanger, and the noise reduction cavity is arranged between the first cross-flow fan and the heat exchanger.

[0015] On the other hand of the present application, an air conditioner is provided, which includes the noise reduction structure as described above or includes the indoor unit of the air conditioner as described above.

[0016] Beneficial effects

[0017] A noise reduction structure, an indoor unit of an air conditioner, and an air conditioner provided in the embodiments of the present invention can effectively reduce the noise value during the operation of the air conditioner and improve the use comfort of users. Description of the drawings

[0018] Figure 1 It is a three-dimensional structure schematic diagram of the noise reduction member and the bottom case of the embodiment of the present application;

[0019] Figure 2 It is a front view of the noise reduction member and the bottom case of the embodiment of the present application;

[0020] Figure 3 It is a structure schematic diagram of the heat exchanger and the bottom case of the embodiment of the present application;

[0021] Figure 4 It is a structure schematic diagram of the noise reduction member, the bottom case and the heat exchanger of the embodiment of the present application.

[0022] The reference numerals are represented as:

[0023] 11. Diversion section; 111. Communication channel; 121. First pressure relief channel; 122. Second pressure relief channel; 131. First anti-escape section; 132. Second anti-escape section; 21. First cross-flow fan; 22. Second cross-flow fan; 3. Heat exchanger. Detailed implementation manners

[0024] Refer to and combine with Figures 1 to 4 As shown, according to an embodiment of the present application, a noise reduction structure includes a noise reduction cavity. The noise reduction cavity is arranged in the air duct. A communication channel 111 is arranged on the cavity wall of the noise reduction cavity. The internal space of the noise reduction cavity is communicated with the air duct through the communication channel 111, so that the fluid in the air duct can flow into the noise reduction cavity. By arranging the noise reduction cavity, the noise sound waves generated by the fluid vibration inside the air duct enter the noise reduction cavity, and the sound waves oscillate inside the noise reduction cavity, thereby weakening and disappearing the energy of the sound waves themselves, which can effectively reduce the noise value during the operation of the air conditioner and improve the user's comfort.

[0025] The noise reduction structure includes a noise reduction member, and the noise reduction member is buckled on the inner wall of the air duct to form a noise reduction cavity between the inner wall of the noise reduction member and the inner wall of the air duct.

[0026] Furthermore, the noise reduction member has a box structure that is hollow and at least one end face is open. The open end face is buckled on the inner wall of the air duct, and a noise reduction cavity is formed between the inner wall of the noise reduction member and the inner wall of the air duct.

[0027] Furthermore, the number of noise reduction cavities can be one or at least two. That is, the noise reduction cavity can be a single noise reduction cavity with a larger volume, or it can be divided into multiple noise reduction cavities with smaller volumes. In this embodiment, the number of noise reduction cavities is one.

[0028] The noise reduction member includes a diversion section 11. The diversion section 11 is arranged at a non-zero angle with the flow direction of the fluid in the air duct, and the communication channel 111 is arranged on the diversion section 11. By arranging the diversion section 11, the diversion section 11 forms a non-zero angle with the flow direction of the fluid in the air duct, so that the fluid in the air duct can smoothly flow into the noise reduction cavity.

[0029] Furthermore, the diversion section 11 is in the shape of a flat plate, and the diversion section 11 is arranged at an angle with the inner wall of the air duct. The opening of the angle formed by the diversion section 11 and the inner wall of the air duct faces the air inlet side of the air duct.

[0030] Furthermore, the diversion section 11 is arranged at the tangent position with the most smooth air flow direction.

[0031] The number of communication channels 111 is multiple, and the multiple communication channels 111 are evenly arranged on the cavity wall of the noise reduction cavity to enable the fluid to pass through evenly.

[0032] Furthermore, the cross-section of the communication channel 111 can be circular, rectangular or other polygons.

[0033] Specifically, in this embodiment, the cross-section of the communication channel 111 is circular.

[0034] Furthermore, in this embodiment, the fluid is air.

[0035] The diameter of the communication channel 111 is 3 - 5 mm. When there are multiple communication channels 111, the distance between the centerlines of adjacent communication channels 111 is 30 - 50 mm.

[0036] A pressure relief channel is provided on the noise reduction cavity. The inlet end of the pressure relief channel is in communication with the internal space of the noise reduction cavity, and the outlet end of the pressure relief channel is in communication with the external environment of the air duct. Sound waves propagate and reflect in the noise reduction cavity, causing the movement of air molecules in the noise reduction cavity. The internal friction of the air leads to an increase in the internal energy inside the noise reduction cavity, thereby consuming the mechanical energy of the sound waves and achieving the purpose of weakening or eliminating the sound. By providing the pressure relief channel, when the air inside the noise reduction cavity absorbs the energy of the sound waves incident into the noise reduction cavity, the internal energy increases and the activity of the air molecules increases. The air inside the noise reduction cavity can be discharged to the outside of the noise reduction cavity through the pressure relief channel, discharging the air with higher energy inside the noise reduction cavity. At the same time, the air with lower energy is inhaled from the communication channel 111 and the pressure relief channel to replace the energy-absorbed air discharged from the pressure relief channel, thereby maintaining the energy balance of the air inside the noise reduction cavity. Through this continuous cycle of absorption - discharge - inhalation, this noise reduction cavity can continuously and stably absorb the energy of the sound waves.

[0037] Further, the pressure relief channel is tubular. That is, a pressure relief pipe is provided on the noise reduction cavity to form the pressure relief channel.

[0038] Further, the cross-section of the pressure relief channel can be circular or other polygons. In this embodiment, the cross-section of the pressure relief channel is circular.

[0039] Further, the number of pressure relief channels can be multiple. In this embodiment, the number of pressure relief channels is two.

[0040] A first pressure relief channel 121 and a second pressure relief channel 122 are provided on the noise reduction cavity. The first pressure relief channel 121 is provided on the first side of the noise reduction cavity, and the second pressure relief channel 122 is provided on the second side of the noise reduction cavity. By providing the first pressure relief channel 121 and the second pressure relief channel 122 on both sides of the noise reduction cavity, it effectively ensures the discharge of the air with higher energy inside the noise reduction cavity.

[0041] Further, the first side of the noise reduction cavity and the second side of the noise reduction cavity are opposite sides. In this embodiment, the first side of the noise reduction cavity is the left side, and the second side of the noise reduction cavity is the right side.

[0042] Further, the first pressure relief channel 121 is arranged perpendicular to the first side cavity wall of the noise reduction cavity. The second pressure relief channel 122 is arranged perpendicular to the second side cavity wall of the noise reduction cavity.

[0043] Further, the first side cavity wall of the noise reduction cavity is perpendicular to the diversion section 11, and the second side cavity wall of the noise reduction cavity is perpendicular to the diversion section 11.

[0044] On the other hand of this embodiment, an indoor unit of an air conditioner is provided, which includes the noise reduction structure as described above.

[0045] The indoor unit of the air conditioner includes a bottom case. When the indoor unit of the air conditioner includes a noise reduction member, the noise reduction member is fastened to the bottom case. The noise reduction member further includes a first anti-escape section 131 and a second anti-escape section 132. The first anti-escape section 131 is disposed on the first side of the noise reduction cavity, and the second anti-escape section 132 is disposed on the second side of the noise reduction cavity. The first anti-escape section 131 and the second anti-escape section 132 extend away from the bottom case. By providing the first anti-escape section 131 and the second anti-escape section 132, a channel for restricting air flow can be formed, effectively preventing the air in the air duct from escaping from the first side and the second side.

[0046] Further, the first side of the noise reduction cavity is the left side, and the second side of the noise reduction cavity is the right side.

[0047] Further, the first anti-escape section 131 is perpendicularly disposed to the diversion section 11, and the second anti-escape section 132 is perpendicularly disposed to the diversion section 11, so that the noise reduction member substantially forms an I-shaped structure.

[0048] The indoor unit of the air conditioner includes a first cross-flow fan blade 21 and a second cross-flow fan blade 22. The first cross-flow fan blade 21 is disposed at the air inlet of the air duct, and the second cross-flow fan blade 22 is disposed at the air outlet of the air duct. The noise reduction cavity is disposed between the first cross-flow fan blade 21 and the second cross-flow fan blade 22. In this embodiment, the first cross-flow fan blade 21 and the second cross-flow fan blade 22 are provided, so that air can be sucked from the air inlet of the air duct, flow through the heat exchanger 3 for heat exchange, and then be blown out after being pressurized and accelerated by the second cross-flow fan blade 22.

[0049] Further, the noise reduction member can guide the air flow to the second cross-flow fan blade 22 and avoid the collision noise generated by the air flow colliding with the bottom case.

[0050] Further, the opening ratio of the communication channel 111 provided on the diversion section 11 is calculated according to the number of middle sections, the number of blades of the first cross-flow fan blade 21 and the second cross-flow fan blade 22 used, and the thickness of relevant structures in the air duct. The opening ratio is within a suitable range, and the calculation formula is as follows:

[0051]

[0052] Where: f0 is the resonance frequency of the sound cavity (Hz). V 声 is the speed of sound in the air, calculated as 340 m / s. P is the opening ratio of the diversion section 11. d is the diameter (mm) of the communication channel 111. L is the air thickness (mm) of the noise reduction cavity. t is the thickness (mm) of the diversion section 11. The calculation formula of the opening ratio P is as follows:

[0053]

[0054] Among them, d is the aperture of the communication channel 111, and B is the center distance between adjacent communication channels 111, with the unit of mm. The fundamental frequency f1 and harmonic frequency calculation formulas of the equidistant through-flow noise are as follows:

[0055]

[0056] Among them: n is the rotational speed of the impeller of the through-flow fan (r / min). Z is the number of blades. I is the harmonic order 1, 2, 3... (when i is 1, it is the fundamental frequency).

[0057] The indoor unit of the air conditioner further includes a heat exchanger 3. The noise reduction cavity is arranged between the first through-flow fan blade 21 and the heat exchanger 3, which can make the distance between the heat exchanger 3 and the second through-flow fan blade 22 larger, reduce the resistance during the air flow process, ensure that the channel from the heat exchanger 3 to the second through-flow fan blade 22 is smooth and unobstructed, and there are no other protrusions causing pressure drop loss, without affecting the air flow into the second through-flow fan blade 22.

[0058] Furthermore, the heat exchanger 3 is arranged at a certain angle with the bottom case.

[0059] On the other hand of this embodiment, an air conditioner is provided, which includes the noise reduction structure as described above or includes the indoor unit of the air conditioner as described above.

[0060] A noise reduction structure, an indoor unit of an air conditioner, and an air conditioner provided in the embodiments of the present invention can effectively reduce the noise value during the operation of the air conditioner, improve the user's comfort, and can effectively reduce the operation noise of the air conditioner by 3 - 4 dB.

[0061] It is easy for those skilled in the art to understand that on the premise of no conflict, the above advantageous ways can be freely combined and superimposed.

[0062] The above is only the preferred embodiment of the present application, and it is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present application, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. An indoor unit of an air conditioner, characterized in that, The indoor unit of the air conditioner includes a noise reduction structure. The indoor unit of the air conditioner includes a bottom case. The noise reduction structure includes a noise reduction chamber, and the noise reduction chamber is arranged in the air duct. The noise reduction structure further includes a noise reduction member, and the noise reduction member is buckled on the bottom case to form the noise reduction chamber between the inner wall of the noise reduction member and the inner wall of the air duct. A communication channel (111) is arranged on the chamber wall of the noise reduction chamber, and the internal space of the noise reduction chamber is communicated with the air duct through the communication channel (111) so that the fluid in the air duct can flow into the noise reduction chamber. The indoor unit of the air conditioner includes a first cross-flow fan blade (21) and a second cross-flow fan blade (22). The first cross-flow fan blade (21) is arranged at the air inlet of the air duct, and the second cross-flow fan blade (22) is arranged at the air outlet of the air duct. The noise reduction chamber is arranged between the first cross-flow fan blade (21) and the second cross-flow fan blade (22). The indoor unit of the air conditioner further includes a heat exchanger (3), and the noise reduction chamber is arranged between the first cross-flow fan blade (21) and the heat exchanger (3).

2. The indoor air conditioner according to claim 1, characterized in that, The noise reduction member includes a diversion section (11), and the diversion section (11) is arranged at an angle other than zero with respect to the flow direction of the fluid in the air duct. The communication channel (111) is arranged on the diversion section (11).

3. The indoor unit of the air conditioner according to claim 1, characterized in that The number of the communication channels (111) is multiple, and the multiple communication channels (111) are evenly arranged on the chamber wall of the noise reduction chamber.

4. The indoor unit of the air conditioner according to claim 1, characterized in that The diameter of the communication channel (111) is 3 - 5 mm. When the number of the communication channels (111) is multiple, the distance between the center lines of adjacent communication channels (111) is 30 - 50 mm.

5. The indoor unit of the air conditioner according to claim 1, characterized in that, A pressure relief channel is arranged on the noise reduction chamber. The inlet end of the pressure relief channel is communicated with the internal space of the noise reduction chamber, and the outlet end of the pressure relief channel is communicated with the external environment of the air duct.

6. The indoor unit of the air conditioner according to claim 5, characterized in that, A first pressure relief channel (121) and a second pressure relief channel (122) are arranged on the noise reduction chamber. The first pressure relief channel (121) is arranged on the first side of the noise reduction chamber, and the second pressure relief channel (122) is arranged on the second side of the noise reduction chamber.

7. The indoor unit of the air conditioner according to claim 1, characterized in that The noise reduction member further includes a first anti-escape section (131) and a second anti-escape section (132). The first anti-escape section (131) is arranged on the first side of the noise reduction chamber, and the second anti-escape section (132) is arranged on the second side of the noise reduction chamber. The first anti-escape section (131) and the second anti-escape section (132) extend away from the bottom case.

8. An air conditioner, characterized in that, Including the indoor unit of the air conditioner according to any one of claims 1 - 7.

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