Air conditioner

Abstract

The utility model discloses an air conditioner and relates to the technical field of air conditioners, the air conditioner comprises an air duct shell, the air duct shell is provided with an air duct and an air duct outlet communicated with the air duct, and the air duct shell is provided with a plurality of sound absorption structures. The sound absorption structure comprises a sound absorption cavity formed in the air duct shell and sound absorption holes communicating with the sound absorption cavity and the air duct, and at least part of the sound absorption structure is arranged close to the air duct outlet. According to the technical scheme provided by the utility model, the miniaturization of the whole machine can be ensured, and meanwhile, low-noise operation is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, and particularly relates to an air conditioner. Background Art

[0002] As an important device for regulating indoor temperature, the performance and user experience of air conditioners have received extensive attention. However, existing air conditioner technologies have some deficiencies in terms of volume and noise control, especially in terms of volume and noise control.

[0003] Traditional air conditioning equipment is often bulky, which limits their use in environments with limited space; while many small air conditioners tend to increase noise during operation in order to reduce volume, so it is difficult for existing air conditioning equipment on the market to achieve a balance between volume reduction and noise reduction. Summary of the Utility Model

[0004] The main object of the utility model is to propose an air conditioner, aiming to achieve low-noise operation while ensuring the miniaturization of the whole machine.

[0005] To achieve the above object, the air conditioner proposed by the utility model includes an air duct housing, the air duct housing has an air duct and an air duct outlet communicated with the air duct, the air duct housing is provided with a plurality of sound-absorbing structures, the sound-absorbing structures include a sound-absorbing cavity provided in the air duct housing and a sound-absorbing hole communicating the sound-absorbing cavity and the air duct, and at least part of the sound-absorbing structures are arranged close to the air duct outlet.

[0006] In one embodiment, a cover plate is fixedly arranged outside the air duct housing, and the sound-absorbing cavity is formed between the cover plate and the air duct housing.

[0007] In one embodiment, in the circumferential direction of the air duct outlet, a plurality of the sound-absorbing structures are arranged at intervals, and the sound-absorbing frequencies of at least two of the sound-absorbing structures are different.

[0008] In one embodiment, the distances between the cover plates and the air duct housing of at least two of the sound-absorbing structures are different.

[0009] In one embodiment, the air duct housing has a first housing wall, and a second housing wall and a third housing wall respectively and laterally connected to opposite sides of the first housing wall, the first housing wall, the second housing wall and the third housing wall are all provided with the sound-absorbing structures, and the sound-absorbing structures include a plurality of the sound-absorbing holes.

[0010] In one embodiment, the first housing wall is parallel to the cover plate located outside the first housing wall;

[0011] And / or, the distance between the first housing wall and the cover plate located outside the first housing wall is h1, and 4 mm ≤ h1 ≤ 10 mm.

[0012] In one embodiment, on a side of the first housing wall facing away from the air duct, a plurality of first limiting ribs connected to the cover plate are provided, and the first limiting ribs are close to the air duct outlet;

[0013] On the first housing wall, a first sound absorption area for opening the sound absorption holes is formed by enclosing with a plurality of the first limiting ribs.

[0014] In one embodiment, in the axial direction of the sound absorption holes, the thickness of the first limiting ribs is the same as the distance between the first housing wall and the cover plate located outside the first housing wall;

[0015] And / or, outside the first sound absorption area, the first housing wall is further provided with a plurality of reinforcing ribs intersecting vertically and horizontally, and the reinforcing ribs are connected to the first limiting ribs;

[0016] And / or, some of the reinforcing ribs are configured as the first limiting ribs.

[0017] In one embodiment, the distance between the second housing wall and the cover plate located outside the second housing wall gradually increases from bottom to top in the axial direction of the air duct outlet.

[0018] In one embodiment, the distance between the second housing wall and the cover plate located outside the second housing wall is h2, and 3 mm ≤ h2 ≤ 15 mm.

[0019] In one embodiment, the second housing wall is inclined inwardly;

[0020] And / or, the cover plate located outside the second housing wall is inclined outwardly.

[0021] In one embodiment, the distance between the third housing wall and the cover plate located outside the third housing wall gradually decreases from bottom to top in the axial direction of the air duct outlet.

[0022] In one embodiment, the distance between the third housing wall and the cover plate located outside the third housing wall is h3, and 5 mm ≤ h3 ≤ 20 mm;

[0023] And / or, the third housing wall is inclined outwardly.

[0024] In one embodiment, the air duct housing has a first housing wall, and a plurality of the sound absorption structures are provided on the first housing wall;

[0025] Outside the first housing wall, a plurality of second limiting ribs intersecting vertically and horizontally are connected, and each of the second limiting ribs is connected to the cover plate;

[0026] Moreover, a plurality of adjacent second limiting ribs enclose to form a second sound absorption area for opening the sound absorption holes.

[0027] In one embodiment, the perforation rates of at least part of the sound-absorbing structure are different;

[0028] and / or, the perforation rate of the sound-absorbing structure is n, where 1% ≤ n ≤ 10%;

[0029] and / or, the depths of at least part of the sound-absorbing holes are different;

[0030] and / or, the depth of the sound-absorbing hole is H, where 0.5 mm ≤ H ≤ 2 mm;

[0031] and / or, the diameters of at least part of the sound-absorbing holes are different;

[0032] and / or, the diameter of the sound-absorbing hole is D, where 0.2 mm ≤ D ≤ 1.5 mm.

[0033] In one embodiment, the air conditioner includes an indoor unit and an outdoor unit. The air duct housing is disposed inside the indoor unit, and the indoor unit and the outdoor unit are connected by a flexible refrigerant pipe.

[0034] In the technical solution of the present utility model, a sound-absorbing structure is arranged by using the structural gap between the air duct housing and the outer shell of the air conditioner, ensuring that the volume of the whole machine remains unchanged and improving the miniaturization level of the air conditioner;

[0035] Among them, multiple sound-absorbing structures are provided and are all fixedly arranged on the air duct housing. The air duct is communicated through the sound-absorbing holes and the sound-absorbing cavities of the sound-absorbing structure, so that the noise in the air duct enters the sound-absorbing cavity through the sound-absorbing holes and dissipates during the process of passing through the sound-absorbing holes and entering the sound-absorbing cavity, realizing the low-noise operation of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0037] Figure 1 It is a schematic structural diagram of an embodiment of the air duct housing of the air conditioner provided by the present utility model;

[0038] Figure 2 It is Figure 1 an exploded view of the air duct housing in

[0039] Figure 3 It is a schematic structural diagram of another embodiment of the air duct housing of the air conditioner provided by the present utility model.

[0040] Description of the attached reference numerals:

[0041] 100, air duct housing; 11, air duct; 111, air duct outlet; 12, sound-absorbing structure; 121, sound-absorbing holes; 122, cover plate; 131, first housing wall; 132, second housing wall; 133, third housing wall; 141, first limiting rib; 142, reinforcing rib; 143, second limiting rib; 151, first housing part; 152, second housing part.

[0042] The realization, functional features, and advantages of the present utility model will be further described in conjunction with embodiments and with reference to the accompanying drawings. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0044] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If this specific posture changes, then such directional indications will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0046] As an important device for regulating indoor temperature, the performance and user experience of air conditioners have received extensive attention. However, there are some deficiencies in the existing air conditioner technology in terms of volume and noise control, especially in terms of volume and noise control.

[0047] Traditional air conditioning equipment is often bulky, which limits their use in environments with limited space. However, they have a relatively large space to add absorption materials such as foam to reduce noise. Many small air conditioners, in order to reduce their volume, often result in increased noise during operation. Therefore, it is difficult for the air conditioning equipment on the existing market to achieve a balance between volume reduction and noise reduction.

[0048] To solve this technical problem, the present utility model proposes an air conditioner.

[0049] Please refer to Figures 1 to 3 , in an embodiment of the present utility model, the air conditioner includes an air duct housing 100. The air duct housing 100 has an air duct 11 and an air duct outlet 111 communicating with the air duct 11. The air duct housing 100 is provided with a plurality of sound-absorbing structures 12. The sound-absorbing structures 12 include a sound-absorbing cavity provided in the air duct housing 100 and a sound-absorbing hole 121 communicating the sound-absorbing cavity and the air duct 11, and at least part of the sound-absorbing structures 12 are arranged close to the air duct outlet 111; thereby ensuring the miniaturization of the whole machine, and at the same time, realizing low-noise operation.

[0050] In the technical solution of the present utility model, the sound-absorbing structure 12 is arranged by using the structural gap between the air duct housing 100 and the outer shell of the air conditioner, ensuring that the volume of the whole machine remains unchanged and improving the miniaturization level of the air conditioner;

[0051] Among them, a plurality of sound-absorbing structures 12 are provided and are all fixedly arranged on the air duct housing 100. The air duct 11 is communicated through the sound-absorbing hole 121 and the sound-absorbing cavity of the sound-absorbing structure 12, so that the noise in the air duct 11 enters the sound-absorbing cavity through the sound-absorbing hole 121 and dissipates during the process of passing through the sound-absorbing hole 121 and entering the sound-absorbing cavity, realizing the low-noise operation of the air conditioner.

[0052] Specifically, according to the installation position and specific shape structure of the air duct housing 100, making full use of the structural gap between the air duct housing 100 and the outer shell of the air conditioner and the structural gap of the air duct housing 100 itself, the outer shell of the air conditioner can specifically be the outer shell of the indoor unit of the air conditioner. Taking the air duct housing 100 being arranged in the indoor unit of the air conditioner as an example, the noise during the operation of the whole machine can be improved without changing the occupied space of the air duct housing 100 in the indoor unit of the air conditioner. Among them, since the noise in the air duct 11 generally spreads out through the air duct outlet 111, a plurality of sound-absorbing structures 12 are provided and at least part of them are arranged close to the air duct outlet 111 to reduce the noise at the air duct outlet 111; however, this design is not limited thereto. In other embodiments, the sound-absorbing structure 12 can also be arranged in the middle of the air duct 11, or arranged at the inlet of the air duct 11.

[0053] In this embodiment, the air duct housing 100 can be specifically configured as a centrifugal volute, which is usually applied to a centrifugal fan. Specifically, the air duct housing 100 includes a first housing part 151 and a second housing part 152 that are covered with each other. At this time, the sound-absorbing structure 12 can be arranged on the first housing part 151 and / or the second housing part 152 to enhance the noise reduction ability of the air duct housing 100. The connection methods of the first housing part 151 and the second housing part 152 include but are not limited to snap connection and screw connection.

[0054] It should be noted that the air conditioner of the present utility model can be a split air conditioner that is convenient for users to install personally. The air conditioner includes an indoor unit of the air conditioner, an outdoor unit of the air conditioner, and a flexible refrigerant pipe connecting the indoor unit of the air conditioner and the outdoor unit of the air conditioner. It uses the flexible refrigerant pipe to connect the indoor heat exchanger of the indoor unit of the air conditioner and the outdoor heat exchanger of the outdoor unit of the air conditioner, and injects refrigerant into the refrigerant circuit before the equipment leaves the factory. In this way, when the user installs the equipment by himself, he only needs to fix the indoor unit of the air conditioner and the outdoor unit of the air conditioner respectively, and does not need to assemble the refrigerant pipe and add refrigerant, thereby reducing the installation difficulty and realizing personal installation by the user. However, this design is not limited thereto. In other embodiments, the air conditioner of the present utility model can also be an ordinary split air conditioner.

[0055] Please refer to Figures 1 to 2 , in the embodiment of the present utility model, a cover plate 122 is fixedly arranged outside the air duct housing 100, and the sound-absorbing cavity is formed between the cover plate 122 and the air duct housing 100. Among them, the installation methods of the cover plate 122 and the air duct housing 100 include but are not limited to bonding, screw locking, and snap connection. The cover plate 122 is a plate-like structure, and the contour line of the plate-like structure includes but is not limited to straight line segments, and can also be a box-like structure. Furthermore, the shape of the sound-absorbing cavity formed between the cover plate 122 and the air duct housing 100 is specifically designed according to the shell wall of the connected air duct housing 100 and the structural gap outside the air duct housing 100 to define the movement space of the noise. In this way, the noise passing through the sound-absorbing holes 121 moves back and forth in the sound-absorbing holes 121 and the sound-absorbing cavity, and generates heat by friction with the corresponding wall surface, achieving the purpose of consuming sound energy, thereby significantly reducing the noise finally transmitted outside the air duct housing 100. At the same time, it does not increase the overall volume of the air duct housing 100 additionally, which helps to realize the miniaturization of the whole machine.

[0056] Optionally, in the embodiment of the present utility model, in the circumferential direction of the air duct outlet 111, a plurality of the sound-absorbing structures 12 are arranged at intervals, and at least two of the sound-absorbing structures 12 have different sound-absorbing frequencies, that is, at least two sound-absorbing cavities can eliminate different noise frequencies, so as to perform noise reduction processing on different frequency noises in the noise, facilitate realizing broadband noise reduction, and further reduce the operating noise of the air conditioner.

[0057] By using different sound-absorbing structures 12 to eliminate different frequency noises, the pertinence of noise reduction is improved, and then the redundant structure is reduced, saving costs.

[0058] Specifically, a corresponding sound-absorbing structure 12 is designed according to the test results of the noise spectrum of the noise in the air duct 11. Among them, since the sound-absorbing structure 12 includes sound-absorbing holes 121 and a sound-absorbing cavity, the sound-absorbing holes 121 are through holes penetrating the air duct shell 100, and the influencing factors of the noise reduction effect of the sound-absorbing structure 12 include but are not limited to the penetration depth of the sound-absorbing holes 121, the diameter of the sound-absorbing holes 121, the perforation rate of the sound-absorbing structure 12, and the size of the sound-absorbing cavity. In other words, by improving at least one of the above influencing factors, the noise frequency corresponding to the sound-absorbing structure 12 changes, so as to improve the width of the noise reduction frequency band and further improve the noise reduction effect of the whole machine.

[0059] Since the sound-absorbing cavity is mainly formed by connecting the cover plate 122 and the air duct shell 100, in the embodiment of the present invention, the distances between the cover plates 122 of at least two of the sound-absorbing structures 12 and the air duct shell 100 are different, that is, by improving the depth dimension of the sound-absorbing cavity, the elimination of noises in different frequency bands by the sound-absorbing structure 12 is controlled.

[0060] Please refer to Figures 1 to 3 , in the embodiment of the present invention, the air duct shell 100 has a first shell wall 131, and a second shell wall 132 and a third shell wall 133 that are respectively laterally connected to opposite sides of the first shell wall 131. The first shell wall 131, the second shell wall 132, and the third shell wall 133 are all provided with the sound-absorbing structure 12, and the sound-absorbing structure 12 includes a plurality of the sound-absorbing holes 121. Through the arrangement of the three sound-absorbing structures 12, different sound-absorbing structures 12 correspond to at least partially different frequencies of noises, that is, through the superposition of the sound-absorbing effects of the three sound-absorbing structures 12, the width of the noise reduction frequency band eliminated by the whole machine is widened, and the noise reduction effect of the whole machine is greatly improved. However, this design is not limited to this. In other embodiments, the air duct shell 100 further includes a fourth shell wall opposite to the first shell wall 131, and the fourth shell wall is also provided with the sound-absorbing structure 12.

[0061] Since the three sound-absorbing structures 12 are respectively arranged on the first shell wall 131, the second shell wall 132, and the third shell wall 133, and the arrangement orientations of the first shell wall 131, the second shell wall 132, and the third shell wall 133 are different, it is convenient to perform noise reduction processing on the air flows in different diffusion directions in the air duct 11 and enhance the noise reduction effect of the whole machine.

[0062] Among them, the sound-absorbing structure 12 includes a plurality of sound-absorbing holes 121, that is, one sound-absorbing cavity corresponds to a plurality of sound-absorbing holes 121, which is convenient for increasing the path for the air flow to enter the sound-absorbing cavity, and is also convenient for the sound-absorbing cavity to cover a large area of the first shell wall 131 or the second shell wall 132 or the third shell wall 133. At the same time, it is convenient to improve the noise reduction effect by improving the perforation rate of the sound-absorbing structure 12. At this time, the perforation rate is the ratio of the total area of each sound-absorbing hole 121 to the area of the corresponding cover plate 122.

[0063] Please refer to Figure 2 , in the embodiment of the present utility model, the first shell wall 131 is parallel to the cover plate 122 located outside the first shell wall 131, that is, the depth of the sound absorption cavity on the first shell wall 131 remains the same at any position. At this time, by changing any specific parameter such as the perforation rate, pore diameter, and pore depth of the sound absorption structure 12, the noise frequency corresponding to the sound absorption structure 12 can be changed. However, this design is not limited thereto. In other embodiments, the first shell wall 131 and the cover plate 122 located outside the first shell wall 131 are arranged at an included angle. The depth direction is specifically the axial direction of the sound absorption holes 121 on the first shell wall 131.

[0064] Specifically, in the embodiment of the present utility model, the distance between the first shell wall 131 and the cover plate 122 located outside the first shell wall 131 is h1, and 4mm ≤ h1 ≤ 10mm. When the depth of the sound absorption cavity on the first shell wall 131 remains unchanged, a value of the distance h1 is taken to design the specific depth of the sound absorption structure 12. Specifically, the distance h1 includes but is not limited to 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, and 10mm. When the depth of the sound absorption cavity on the first shell wall 131 is gradually changed, the depth at any position also satisfies 4mm ≤ h1 ≤ 10mm to ensure the elimination of noise with a specific frequency by the sound absorption cavity, improve the targeting of noise elimination, widen the noise frequency band corresponding to the sound absorption structure 12, and enhance the noise reduction effect.

[0065] Specifically, in the embodiment of the present utility model, a plurality of first limiting ribs 141 connected to the cover plate 122 are provided on the side of the first shell wall 131 facing away from the air duct 11, and the first limiting ribs 141 are close to the air duct outlet 111; to eliminate the noise at the air duct outlet 111, and the structural strength near the air duct outlet 111 can also be enhanced;

[0066] Among them, on the first shell wall 131, a first sound absorption area for opening the sound absorption holes 121 is formed by enclosing with a plurality of the first limiting ribs 141. It can be understood that each first limiting rib 141 and the first shell wall 131 cooperate to form a first sound absorption area with an outward opening. At this time, the cover plate 122 can adaptively cover the opening and be connected to the first limiting ribs 141 to form a sound absorption cavity on the first shell wall 131.

[0067] Further, in an embodiment of the present utility model, in the axial direction of the sound absorption hole 121, the thickness of the first limiting rib 141 is the same as the distance between the first shell wall 131 and the cover plate 122 located outside the first shell wall 131. That is, the thickness of the first limiting rib 141 is also greater than or equal to 4 mm and less than or equal to 10 mm. However, this design is not limited thereto. In other embodiments, a plurality of ribs are further provided in the sound absorption cavity, and the thickness of at least some of the ribs is lower than the thickness of the first limiting rib 141, which is convenient for reasonably planning the diffusion path of the air flow entering the sound absorption cavity. At the same time, the structural strength of the sound absorption cavity is enhanced.

[0068] Optionally, in an embodiment of the present utility model, outside the first sound absorption area, the first shell wall 131 is further provided with a plurality of reinforcing ribs 142 that are criss-crossed. The reinforcing ribs 142 are connected to the first limiting rib 141. With this arrangement, the plurality of first limiting ribs 141 and the plurality of reinforcing ribs 142 are connected and cover the first shell wall 131, which can not only ensure the formation of the sound absorption cavity, but also reliably enhance the structural strength of the first shell wall 131. In this embodiment, the first shell wall 131 serves as the mounting surface for fixing the motor and the wind wheel. The arrangement of the reinforcing ribs 142 helps to enhance the assembly reliability of the motor and the wind wheel.

[0069] Among them, some of the reinforcing ribs 142 are configured as the first limiting rib 141. Specifically, by configuring the first limiting rib 141 as a reinforcing rib 142, that is, when the first limiting rib 141 can be used as a structure for enhancing the structural strength on the existing air duct shell 100, at this time, only by opening the sound absorption hole 121 and covering the cover plate 122, the rib positions on the air duct shell 100 can be fully utilized to achieve the purpose of noise reduction without additionally increasing the occupied space of the air duct shell 100. The structure is simple, the noise reduction is efficient, and at the same time, it helps to realize the miniaturization of the whole machine.

[0070] Please refer to Figure 2 , in an embodiment of the present utility model, the distance between the second shell wall 132 and the cover plate 122 located outside the second shell wall 132 gradually increases from bottom to top in the axial direction of the air duct outlet 111. It can be understood that since the second shell wall 132 is provided on the side of the air duct shell 100, there is a large assembly space between it and the outer shell of the air conditioner. Furthermore, it is convenient to change the depth of the sound absorption cavity located on the second shell wall 132. The specific depth direction is the axial direction of the sound absorption hole 121 located on the second shell wall 132.

[0071] Taking the cover plate 122 as an example of a plate-like structure, a plurality of third limiting ribs are provided on the side of the second housing wall 132 facing away from the air duct 11. Each third limiting rib cooperates with the second housing wall 132 to form a third sound-absorbing area with an outward opening. A plurality of sound-absorbing holes 121 are provided in the third sound-absorbing area. At this time, the cover plate 122 can adaptively cover the opening and be connected to the third limiting rib to form a sound-absorbing cavity on the second housing wall 132.

[0072] Specifically, in one embodiment, the second housing wall 132 is inclined inward. At this time, the distance between the second housing wall 132 and the outer housing gradually increases. When the cover plate 122 is disposed on the second housing wall 132, in the axial direction of the air duct outlet 111, the distance between the cover plate 122 and the second housing wall 132 gradually increases from bottom to top. Furthermore, the sound-absorbing structure 12 can perform noise reduction processing on noises with different frequencies in the noise, facilitating wide-band noise reduction, and further reducing the operating noise of the air conditioner. Here, "inward" specifically means approaching the axis of the air duct outlet 111.

[0073] In another embodiment, the cover plate 122 located outside the second housing wall 132 is inclined outward; when the cover plate 122 is disposed on the second housing wall 132, in the axial direction of the air duct outlet 111, the distance between the cover plate 122 and the second housing wall 132 gradually increases from bottom to top. Furthermore, the sound-absorbing structure 12 can perform noise reduction processing on noises with different frequencies in the noise, facilitating wide-band noise reduction, and further reducing the operating noise of the air conditioner. Here, "outward" specifically means approaching the direction away from the axis of the air duct outlet 111.

[0074] In still another embodiment, the second housing wall 132 is inclined inward; and the cover plate 122 located outside the second housing wall 132 is inclined outward. Furthermore, under a reasonable structural gap, by using the inward inclination of the second housing wall 132 and the outward inclination of the cover plate 122, the noise frequency band can be widened to a certain extent, increasing the selective elimination of noises with different frequencies by the sound-absorbing structure 12 and improving the noise reduction effect of the whole machine.

[0075] Optionally, in the embodiment of the present invention, the distance between the second housing wall 132 and the cover plate 122 located outside the second housing wall 132 is h2, and 3 mm ≤ h2 ≤ 15 mm. It can be understood that within the allowable range of the structural gap, the depth of the sound-absorbing cavity at different positions is selectively selected to correspondingly eliminate different noise frequencies, and it is reliably ensured that the sound-absorbing cavity eliminates noises of specific frequencies, improving the targeting of noise elimination and widening the noise frequency band corresponding to the sound-absorbing structure 12, enhancing the noise reduction effect.

[0076] Specifically, the spacing h2 includes but is not limited to 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm.

[0077] Please refer to Figure 2 , in the embodiment of the present utility model, the spacing between the third housing wall 133 and the cover plate 122 located outside the third housing wall 133 gradually decreases from bottom to top in the axial direction of the air duct outlet 111. It can be understood that since the third housing wall 133 is provided on the side of the air duct housing 100, and when the third housing wall 133 is provided with a volute tongue structure, on the basis of not increasing the overall occupied space, its assembly space is limited. Therefore, by gradually changing the depth of the sound absorption cavity on the third housing wall 133, on the basis of reasonably utilizing the assembly space, noise of specific frequencies is eliminated. The specific depth direction is the axial direction of the sound absorption holes 121 on the third housing wall 133. However, this design is not limited thereto. In other embodiments, the spacing between the third housing wall 133 and the cover plate 122 located outside the third housing wall 133 gradually increases from bottom to top in the axial direction of the air duct outlet 111, or the third housing wall 133 is parallel to the cover plate 122.

[0078] Taking the cover plate 122 as a plate-like structure and the sound absorption structure 12 being close to the volute tongue structure as an example, a plurality of fourth limiting ribs are provided on the side of the third housing wall 133 facing away from the air duct 11. Each fourth limiting rib cooperates with the third housing wall 133 to form a fourth sound absorption area with an outward opening. A plurality of sound absorption holes 121 are provided in the fourth sound absorption area. At this time, the cover plate 122 can adaptively cover the opening and be connected to the fourth limiting ribs to form a sound absorption cavity on the third housing wall 133.

[0079] Specifically, in one embodiment, the third housing wall 133 is inclined outward. At this time, the assembly space at the lower part of the third housing wall 133 is limited. The cover plate 122 can include a first cover body and a second cover body arranged at an angle to form a sound absorption cavity with a specific shape, which is convenient for noise reduction processing of different frequencies in the noise, convenient for realizing wide-band noise reduction, and further reducing the operating noise of the air conditioner. Here, the outward direction is specifically close to the direction away from the axis of the air duct outlet 111. Optionally, in other embodiments, the third housing wall 133 is parallel to the cover plate 122 located outside the third housing wall 133.

[0080] Optionally, in an embodiment of the present utility model, the distance between the third housing wall 133 and the cover plate 122 located outside the third housing wall 133 is h3, where 5 mm ≤ h3 ≤ 20 mm; it can be understood that within the allowable range of the assembly space, the depth of the sound absorption cavity at different positions is selectively selected to correspondingly eliminate different noise frequencies, and it is reliably ensured that the sound absorption cavity eliminates the noise of a specific frequency, improving the targeting of noise elimination and broadening the noise frequency band corresponding to the sound absorption structure 12, enhancing the noise reduction effect.

[0081] Specifically, the distance h3 includes, but is not limited to, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm.

[0082] Optionally, in an embodiment of the present utility model, at least part of the perforation rate of the sound absorption structure 12 is different. Thus, according to the noise reduction frequency requirement, the corresponding perforation rate can be selected for the noise within a certain frequency band to ensure the elimination of the noise of a specific frequency. Of course, the overall noise reduction effect can also be improved by coordinating with the specific parameters of other influencing factors. And the perforation rates of different sound absorption structures 12 are different. By superimposing the elimination effects on different noise frequencies, it helps to achieve broadband noise reduction and reduce the operating noise of the air conditioner. For this reason, the perforation rate of the sound absorption structure 12 is n, where 1% ≤ n ≤ 10%. Of course, in different application environments, this perforation rate can be changed.

[0083] Specifically, the values of the perforation rate of the sound absorption structure 12 include, but are not limited to, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%.

[0084] Optionally, in an embodiment of the present utility model, at least part of the depths of the sound absorption holes 121 are different. Thus, according to the noise reduction frequency requirement, the corresponding hole depth can be selected for the noise within a certain frequency band to ensure the elimination of the noise of a specific frequency. Of course, the overall noise reduction effect can also be improved by coordinating with the specific parameters of other influencing factors.

[0085] Among them, when a sound absorption cavity corresponds to multiple sound absorption holes 121, the hole depths of the sound absorption holes 121 located in the same sound absorption cavity can be different or the same; the sound absorption holes 121 corresponding to different sound absorption cavities can also be the same or set differently, which can be specifically set according to the specific noise reduction frequency requirement and the thickness of the specific air duct housing 100.

[0086] For this purpose, the depth of the sound absorption hole 121 is H, where 0.5 mm ≤ H ≤ 2 mm. Of course, in different application environments, the hole depth can be changed. Specifically, the values of the depth of the sound absorption hole 121 include, but are not limited to, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm.

[0087] Optionally, in an embodiment of the present invention, at least some of the diameters of the sound absorption holes 121 are different; thus, according to the noise reduction frequency requirements, the corresponding hole diameters can be selected for the noise within a certain frequency band to ensure the elimination of noise at a specific frequency. Of course, the overall noise reduction effect can also be improved in combination with the specific parameters of other influencing factors.

[0088] Among them, when a sound absorption cavity corresponds to multiple sound absorption holes 121, the hole diameters of the sound absorption holes 121 located in the same sound absorption cavity can be different or the same; the sound absorption holes 121 corresponding to different sound absorption cavities can also be the same or arranged differently, and can be specifically set according to the specific noise reduction frequency requirements.

[0089] For this purpose, the diameter of the sound absorption hole 121 is D, where 0.2 mm ≤ D ≤ 1.5 mm. Of course, in different application environments, the hole depth can be changed. Specifically, the values of the depth of the sound absorption hole 121 include, but are not limited to, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm.

[0090] According to the specific limitations of the above parameters, the air duct housing 100 provided by the present invention can effectively suppress the noise in the range of 500 Hz to 1500 Hz, and this frequency band (500 Hz to 1500 Hz) is the main frequency of the noise generated by the air conditioner. Therefore, the air conditioner using the air duct housing 100 provided by the present invention can effectively reduce the noise level of the air conditioner, and at the same time, ensure the miniaturization level of the whole machine.

[0091] Please refer to Figure 3 , in an embodiment of the present invention, the air duct housing 100 has a first shell wall 131, and the first shell wall 131 is provided with a plurality of the sound absorption structures 12; at this time, the sound absorption structures 12 are arranged along the extending direction of the air duct 11 to perform noise reduction processing on the air flow at various positions in the air duct 11;

[0092] Wherein, a plurality of second limiting ribs 143 that crisscross each other are disposed outside the first shell wall 131, and each of the second limiting ribs 143 is connected to the cover plate 122; moreover, a plurality of adjacent second limiting ribs 143 enclose a second sound absorption area for forming the sound absorption holes 121. With such a setting, it can not only ensure the formation of each sound absorption cavity, but also reliably enhance the structural strength of the first shell wall 131. In this embodiment, the first shell wall 131 serves as an installation surface for fixing the motor and the wind wheel, and the setting of the reinforcing ribs 142 helps to enhance the assembly reliability of the motor and the wind wheel. In addition, the rib positions on the air duct shell 100 can be fully utilized to achieve the purpose of noise reduction without additionally increasing the occupied space of the air duct shell 100. The structure is simple, the noise reduction is efficient, and at the same time, it helps to realize the miniaturization of the whole machine.

[0093] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. An air conditioner, characterized in that, The air duct shell includes an air duct and an air duct outlet connected to the air duct. The air duct shell is provided with multiple sound absorbing structures. The sound absorbing structures include a sound absorbing cavity provided in the air duct shell and sound absorbing holes connecting the sound absorbing cavity and the air duct, and at least part of the sound absorbing structures are arranged near the air duct outlet.

2. The air conditioner according to claim 1, characterized in that, A cover plate is fixedly provided outside the air duct shell, and the sound absorbing cavity is formed between the cover plate and the air duct shell.

3. The air conditioner according to claim 2, characterized in that, A plurality of the sound absorbing structures are provided at intervals in the circumferential direction of the air duct outlet, and at least two of the sound absorbing structures have different sound absorbing frequencies.

4. The air conditioner according to claim 3, characterized in that, The distances between the cover plates and the air duct shells of at least two of the sound absorbing structures are different.

5. The air conditioner according to claim 4, characterized in that, The air duct shell has a first shell wall, and a second shell wall and a third shell wall respectively connected to opposite sides of the first shell wall laterally. The first shell wall, the second shell wall and the third shell wall are all provided with the sound absorbing structure, and the sound absorbing structure includes a plurality of the sound absorbing holes.

6. The air conditioner according to claim 5, characterized in that, The first shell wall is parallel to the cover plate located outside the first shell wall; And / or, a distance between the first shell wall and the cover plate located outside the first shell wall is h1, 4mm≤h1≤10mm.

7. The air conditioner according to claim 6, characterized in that, A plurality of first limiting ribs connected to the cover plate are provided on a side of the first shell wall facing away from the air duct, and the first limiting ribs are close to the air duct outlet; On the first shell wall, a first sound absorbing area for providing the sound absorbing holes is formed by enclosing a plurality of the first limiting ribs.

8. The air conditioner according to claim 7, wherein, In the axial direction of the sound-absorbing hole, the thickness of the first limiting rib is the same as the distance between the first shell wall and the cover plate located outside the first shell wall; And / or, outside the first sound absorbing area, the first shell wall is further provided with a plurality of crisscrossing reinforcing ribs, wherein the reinforcing ribs are connected to the first limiting ribs; And / or, part of the reinforcing ribs are configured as the first limiting ribs.

9. The air conditioner according to claim 5, characterized in that, The distance between the second shell wall and the cover plate located outside the second shell wall gradually increases from bottom to top in the axial direction of the air duct outlet.

10. The air conditioner according to claim 9, characterized in that, The distance between the second shell wall and the cover plate located outside the second shell wall is h2, 3mm≤h2≤15mm.

11. The air conditioner according to claim 9, characterized in that, The second shell wall is arranged to be inclined inwards; And / or, the cover plate located outside the second shell wall is arranged to be inclined outward.

12. The air conditioner according to claim 5, wherein The distance between the third shell wall and the cover plate located outside the third shell wall gradually decreases from bottom to top in the axial direction of the air duct outlet.

13. The air conditioner according to claim 12, characterized in that, The distance between the third shell wall and the cover plate outside the third shell wall is h3, 5mm≤h3≤20mm; And / or, the third shell wall is arranged to be inclined outward.

14. The air conditioner according to claim 4, characterized in that, The air duct shell has a first shell wall, and the first shell wall is provided with a plurality of the sound absorbing structures; A plurality of second position-limiting ribs are arranged on the outside of the first shell wall, and each of the second position-limiting ribs is connected to the cover plate; Furthermore, a plurality of adjacently arranged second limiting ribs enclose and form a second sound absorbing area for providing the sound absorbing holes.

15. The air conditioner according to claim 3, characterized in that, At least some of the sound absorbing structures have different perforation rates; and / or, the perforation ratio of the sound absorbing structure is n, 1%≤n≤10%; and / or, at least some of the sound absorbing holes have different depths; And / or, the depth of the sound-absorbing hole is H, 0.5 mm ≤ H ≤ 2 mm; And / or, the diameters of at least some of the sound absorption holes are different; And / or, the diameter of the sound absorption hole is D, where 0.2 mm ≤ D ≤ 1.5 mm.

16. The air conditioner according to claim 1, characterized in that, The air conditioner includes an indoor unit and an outdoor unit. The air duct housing is provided inside the indoor unit, and the indoor unit and the outdoor unit are connected by a flexible refrigerant pipe.

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