Air pipe type air conditioner

Abstract

The utility model discloses an air pipe type air conditioner which comprises a shell, a heat exchanger and a fan assembly, the shell defines a heat exchange cavity and a fan cavity which are arranged in the transverse direction, the heat exchanger is arranged in the heat exchange cavity, the fan assembly is arranged in the fan cavity and comprises a volute and a wind wheel, the volute defines an air channel, and the wind wheel is arranged in the air channel. The wind wheel is rotatably arranged in the air duct, and the rotating axis of the wind wheel extends in the longitudinal direction; the volute comprises a volute tongue and two first air duct walls, the two first air duct walls are oppositely arranged in the longitudinal direction, the volute tongue is connected between the two first air duct walls, an outlet of the air duct is located between the volute tongue and the two first air duct walls, a first cover plate is arranged on the first air duct walls, and a first noise reduction cavity is defined between the first cover plate and the first air duct walls. The first noise reduction cavity communicates with an outlet of the air duct through the first noise reduction hole. According to the air duct type air conditioner, on the basis that the size of the air duct type air conditioner is not increased, noise reduction can be achieved, and the use experience of a user can be improved conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a duct type air conditioner. Background Art

[0002] Most duct air conditioners in related technologies adopt centrifugal air duct design. The quality of the centrifugal air duct directly determines the air volume and noise index of the duct air conditioner, and directly affects the performance parameters of the duct air conditioner. Currently, there is extremely limited room for improvement in noise by relying solely on duct design. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a ducted air conditioner that can reduce noise without increasing the size of the ducted air conditioner, thereby improving the user experience.

[0004] 18. The duct-type air conditioner of claim 17, wherein the heat exchanger is located within the heat exchange chamber and comprises a volute and a fan. The volute defines an air duct, wherein the volute defines an air duct in an inlet of the volute and is connected to the fan chamber, and an outlet of the volute is connected to the heat exchange chamber. The volute defines a wind duct, wherein the inlet of the duct is connected to the fan chamber, and the outlet of the duct is connected to the heat exchange chamber. The fan is rotatably arranged in the duct and the rotation axis of the fan extends along the longitudinal direction. The volute includes a volute tongue and two first duct walls, the two first duct walls are arranged opposite to each other in the longitudinal direction, the volute tongue is connected between the two first duct walls, the outlet of the duct is located between the volute tongue and the two first duct walls, the first duct wall is provided with a first cover plate, a first noise reduction chamber is defined between the first cover plate and the first duct wall, and the first noise reduction chamber and the outlet of the duct are connected through a first noise reduction hole.

[0005] According to the duct-type air conditioner of the embodiment of the present invention, a first noise reduction cavity can be defined by arranging a first cover plate on the first air duct wall. When the air flow flows to the outlet of the air duct, sound waves can enter the first noise reduction cavity through the first noise reduction hole. After the sound waves enter the first noise reduction cavity, resonance will occur, and the sound energy will be consumed through the resonance effect, thereby achieving the purpose of sound absorption and noise reduction. Noise reduction is achieved without increasing the size of the duct-type air conditioner, which is convenient for improving the user experience.

[0006] According to some embodiments of the present invention, a first dividing rib is provided between the first air duct wall and the first cover plate to form a plurality of first noise reduction cavities between the first air duct wall and the first cover plate.

[0007] In some embodiments, there are multiple first dividing ribs, and the multiple first dividing ribs are arranged at intervals in the horizontal or vertical direction; or, there are multiple first dividing ribs, and at least two of the first dividing ribs have different extension directions and are arranged at an angle to each other.

[0008] In some embodiments, one of the first air duct wall and the first cover plate is integrally formed with the first dividing rib, and the other is abutted against the first dividing rib.

[0009] According to some embodiments of the present invention, the first cover plate is arranged on the outside of the first air duct wall and a plurality of first noise reduction cavities are defined between the two. A plurality of first noise reduction holes are provided on the first air duct wall, and each first noise reduction cavity is connected to the outlet of the air duct through one or more first noise reduction holes.

[0010] According to some embodiments of the present invention, a partition is provided in the outer shell to separate the inner cavity of the outer shell into the heat exchange cavity and the fan cavity, and the partition defines a connecting port, and the outlet of the air duct is connected to the heat exchange cavity through the connecting port; wherein, the volute tongue and the two first air duct walls are connected to the partition.

[0011] In some embodiments, the volute includes a first shell and a second shell, and the first shell and the second shell are arranged vertically opposite to each other and connected to jointly define the air duct; wherein, the first shell is detachably connected to the partition, and the second shell is integrally formed with the partition, the volute tongue is located in the first shell, and the two first air duct walls are located in the second shell.

[0012] In some embodiments, the volute further includes a second air duct wall, which is vertically arranged opposite to the volute tongue, and the second air duct wall is connected between two first air duct walls, and the first air duct wall is connected to the partition.

[0013] In some examples, the second air duct wall is adapted to define a second noise reduction cavity, and a second noise reduction hole is provided on the second air duct wall, wherein the second noise reduction hole connects the second noise reduction cavity and the outlet of the air duct.

[0014] In some examples, the partition is suitable for defining a third noise reduction cavity, and a third noise reduction hole is provided on the partition, and the third noise reduction hole connects the third noise reduction cavity and the communication port.

[0015] In some specific examples, the third noise reduction cavity is disposed close to the second air duct wall in the circumferential direction of the communication port.

[0016] According to some embodiments of the present invention, there are multiple volutes and multiple wind wheels, and the multiple wind wheels are coaxially arranged and arranged one-to-one in the multiple volutes; wherein, the first air duct wall of each volute is provided with the first cover plate to define the first noise reduction cavity.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a duct-type air conditioner according to some embodiments of the present utility model;

[0020] Figure 2 It is along Figure 1 Structural cross-section view along line AA;

[0021] Figure 3 This is a partial structural diagram of a duct-type air conditioner according to an embodiment of the present utility model;

[0022] Figure 4 yes Figure 3 An enlarged view of part B shown in ;

[0023] Figure 5 yes Figure 3 A side view of the structure shown in;

[0024] Figure 6 This is a schematic diagram of the principle of the Helmholtz resonator;

[0025] Figure 7 It is a structural cross-sectional view of the duct type air conditioner of other embodiments of the present utility model.

[0026] Reference numerals:

[0027] Duct air conditioner 100,

[0028] Housing 10, fan chamber 101, heat exchange chamber 102, air inlet 103, air outlet 104, top wall 11,

[0029] Heat exchanger 20,

[0030] Fan assembly 30, volute 31, air duct 3101, inlet 3102, outlet 3103, first housing 311, volute tongue 3111, second housing 312, first air duct wall 3121, first noise reduction cavity 3121a, first noise reduction hole 3121b, second air duct wall 3122, second noise reduction cavity 3122a, first cover plate 32, wind wheel 33, motor 34, first separating rib 35, second separating rib 36,

[0031] Partition 50, communication port 51, third noise reduction chamber 521, third partition rib 53,

[0032] The second cover plate 61 , the third cover plate 62 , the cover body 63 , the fourth noise reduction cavity 631 , and the fourth noise reduction hole 632 . DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] Reference below Figure 1-Figure 7 A duct-type air conditioner 100 according to an embodiment of the present invention is described.

[0035] Reference Figure 1-Figure 3 According to an embodiment of the present invention, the ducted air conditioner 100 includes a housing 10, a heat exchanger 20 and a fan assembly 30. The housing 10 defines a heat exchange cavity 102 and a fan cavity 101. The heat exchange cavity 102 and the fan cavity 101 are arranged in a horizontal direction (e.g., Figure 2 The heat exchanger 20 is arranged in the heat exchange cavity 102, and the fan assembly 30 is arranged in the fan cavity 101.

[0036] Specifically, the housing 10 has an air inlet 103 and an air outlet 104. The air inlet 103 communicates with the fan chamber 101, and the air outlet 104 communicates with the heat exchange chamber 102. When the ducted air conditioner 100 is in operation, the fan assembly 30 drives air outside the housing 10 into the fan chamber 101 through the air inlet 103. After being pressurized by the fan assembly 30, the air is transported to the heat exchange chamber 102 for heat exchange with the heat exchanger 20. Finally, the air is discharged from the air outlet 104 and delivered to the indoor space to adjust the temperature of the indoor space.

[0037] The fan assembly 30 includes a volute 31 and a wind wheel 33. The volute 31 defines an air duct 3101. The inlet 3102 of the air duct 3101 is connected to the fan chamber 101. The outlet 3103 of the air duct 3101 is connected to the heat exchange chamber 102. The wind wheel 33 is rotatably arranged in the air duct 3101, and the rotation axis of the wind wheel 33 is longitudinally (e.g., Figure 1 and Figure 3 The left and right directions shown in FIG.

[0038] Please refer again Figure 3 , and further reference Figure 4 and Figure 5 The volute 31 includes a volute tongue 3111 and two first air duct walls 3121. The two first air duct walls 3121 are longitudinally opposed to each other. The volute tongue 3111 is connected between the two first air duct walls 3121. The outlet 3103 of the air duct 3101 is located between the volute tongue 3111 and the two first air duct walls 3121. A first cover plate 32 is provided on the first air duct wall 3121. A first noise reduction cavity 3121a is defined between the first cover plate 32 and the first air duct wall 3121. The first noise reduction cavity 3121a is connected to the outlet 3103 of the air duct 3101 via a first noise reduction hole 3121b. In other words, the first noise reduction cavity 3121a and the first noise reduction hole 3121b are positioned corresponding to the outlet 3103 of the air duct 3101.

[0039] Specifically, when the impeller 33 rotates at high speed, airflow passing over the blades interacts with the relatively stationary airflow behind the blades due to the viscous friction of air molecules, forming an airflow with vortices in the downstream area of ​​the blades. These vortices constantly change and break off. The pressure at the center of each vortex is lower than that of the surrounding medium. When a vortex breaks off, a pressure jump occurs in the turbulent airflow. This pressure jump propagates outward through the surrounding medium and acts on the blades. When the pressure fluctuations in the turbulent airflow contain audible frequency components and are sufficiently strong, they radiate noise, forming turbulent noise. Simultaneously, as the impeller 33 rotates, the blades sweep over the air in the vicinity. Due to the mutual interaction of forces, the gas medium is affected by the blades, generating a periodic pressure field and emitting noise. As airflow passes over the blades, the boundary layers of the suction and pressure surfaces merge at the trailing edge to form a wake region. Within the wake region, the pressure and velocity of the airflow are significantly lower than those in the mainstream area. As the impeller 33 rotates, the airflow in the area of ​​the blade outlet 3103 exhibits significant non-uniformity. This uneven potential flow field periodically acts on surrounding obstacles, generating noise similar to the sound produced by stroking a string, which is ultimately discharged along with the airflow from outlet 3103 of air duct 3101. Furthermore, since volute tongue 3111 is typically positioned near outlet 3103 of air duct 3101, higher noise levels near volute tongue 3111 are easily transmitted into the room through outlet 3103 of air duct 3101.

[0040] Therefore, by arranging the setting positions of the first noise reduction chamber 3121a and the first noise reduction hole 3121b to correspond to the position of the outlet 3103 of the air duct 3101, the airflow noise at the outlet 3103 of the air duct 3101 can be absorbed in time, thereby reducing the transmission of noise and improving the user experience.

[0041] More specifically, the air flow flows in the air duct 3101 defined by the volute 31. When the air flow flows to the outlet 3103 of the air duct 3101, the sound waves can enter the first noise reduction cavity 3121a through the first noise reduction hole 3121b. When the sound waves enter the first noise reduction cavity 3121a, they will collide with the cavity wall of the first noise reduction cavity 3121a and produce reflections. These reflected sound waves will interfere with the incident sound waves to form a complex sound field distribution. At certain frequencies, the first noise reduction cavity 3121a will produce a resonance effect, causing the sound waves to be attenuated in the first noise reduction cavity 3121a, thereby achieving the effect of noise reduction.

[0042] Therefore, according to the duct air conditioner 100 of the embodiment of the present invention, by setting a first cover plate 32 on the first air duct wall 3121, a first noise reduction chamber 3121a can be defined. When the air flow flows to the outlet 3103 of the air duct 3101, the sound waves can enter the first noise reduction chamber 3121a through the first noise reduction hole 3121b. After the sound waves enter the first noise reduction chamber 3121a, resonance will occur, and the sound energy will be consumed through the resonance effect, thereby achieving the purpose of sound absorption and noise reduction, so as to achieve noise reduction without increasing the size of the duct air conditioner 100, thereby improving the user experience.

[0043] like Figure 5 As shown, according to some embodiments of the present invention, a first dividing rib 35 is provided between the first air duct wall 3121 and the first cover plate 32 to form multiple first noise reduction cavities 3121a between the first air duct wall 3121 and the first cover plate 32. In the description of the present invention, unless otherwise specified, "multiple" means two or more. By providing the first dividing rib 35 between the first air duct wall 3121 and the first cover plate 32 to form multiple first noise reduction cavities 3121a, the difficulty of forming the multiple first noise reduction cavities 3121a can be reduced, thereby reducing the difficulty of noise reduction.

[0044] In some embodiments, there are multiple first dividing ribs 35, and the multiple first dividing ribs 35 are arranged at intervals in the horizontal or vertical direction to form multiple first noise reduction cavities 3121a between the first air duct wall 3121 and the first cover plate 32, thereby reducing the difficulty of forming the multiple first noise reduction cavities 3121a.

[0045] In other embodiments, there are multiple first dividing ribs 35 , and at least two first dividing ribs 35 extend in different directions and are arranged to intersect at an angle.

[0046] Specifically, among the multiple first dividing ribs 35, a part of the first dividing ribs 35 can be arranged at intervals in the vertical direction and the length direction of each first dividing rib 35 extends along the horizontal direction, and another part of the first dividing ribs 35 can be arranged at intervals in the horizontal direction and the length direction of each first dividing rib 35 extends along the vertical direction, thereby defining a plurality of first noise reduction cavities 3121a arranged in the horizontal and vertical directions.

[0047] Therefore, by cross-arranging multiple first dividing ribs 35, multiple first dividing ribs 35 can be used to cooperate to form a larger number of first noise reduction cavities 3121a between the first air duct wall 3121 and the first cover plate 32, which not only reduces the difficulty of forming multiple first noise reduction cavities 3121a, but also improves the noise reduction effect.

[0048] In some embodiments, one of the first air duct wall 3121 and the first cover plate 32 is integrally formed with the first dividing rib 35 , and the other is abutted against the first dividing rib 35 .

[0049] What this means is that when the first air duct wall 3121 and the first dividing rib 35 are integrally formed, the first cover plate 32 and the first dividing rib 35 are abutted against each other; or, when the first cover plate 32 and the first dividing rib 35 are integrally formed, the first air duct wall 3121 and the first dividing rib 35 are abutted against each other. While reducing the difficulty of forming the first dividing rib 35, the opposite ends of the first dividing rib 35 can also be respectively matched with the first air duct wall 3121 and the first cover plate 32. Since the sealing of each first noise reduction cavity 3121a is guaranteed after assembly, the noise reduction effect of the first noise reduction cavity 3121a is guaranteed.

[0050] like Figure 5 As shown, in some embodiments, the first air duct wall 3121 and the first dividing rib 35 are integrally formed, which can ensure the sealing of each first noise reduction cavity 3121a after assembly. At the same time, the dividing rib can also be used to support the first cover plate 32 to improve the installation stability of the first cover plate 32.

[0051] According to some embodiments of the present invention, the first cover plate 32 is arranged on the outer side of the first air duct wall 3121, and a plurality of first noise reduction cavities 3121a are defined between the first cover plate 32 and the first air duct wall 3121. The first air duct wall 3121 is provided with a plurality of first noise reduction holes 3121b. Each first noise reduction cavity 3121a is connected to the outlet 3103 of the air duct 3101 through one or more first noise reduction holes 3121b. The specific selection can be made based on the area of ​​the first air duct wall 3121 and the first cover plate 32 and other factors.

[0052] In the above technical solution, by arranging the first cover plate 32 on the outside of the first air duct wall 3121, the molding difficulty of the first air duct wall 3121 can be reduced, thereby increasing the processing difficulty of the volute 31, which is beneficial to improving production efficiency. Since the first cover plate 32 can be installed to the outside of the first air duct wall 3121 on the outside of the volute 31, the assembly difficulty of the first cover plate 32 and the first air duct wall 3121 can be reduced, and the production efficiency can be further improved.

[0053] like Figure 6 As shown, in some embodiments, the flow area of ​​the first noise reduction hole 3121b is smaller than the flow area of ​​the first noise reduction cavity 3121a. This allows the first noise reduction hole 3121b and the first noise reduction cavity 3121a to cooperate to form a Helmholtz resonator. In this way, when air flows from the first noise reduction hole 3121b into the first noise reduction cavity 3121a, since the flow area of ​​the first noise reduction cavity 3121a is larger than the flow area of ​​the first noise reduction hole 3121b, the flow velocity of the air in the first noise reduction cavity 3121a is much smaller than the flow velocity of the local airflow in the center of the first noise reduction cavity 3121a, thereby forming a more violent shear flow in the first noise reduction cavity 3121a, accompanied by unstable disturbance waves. At the same time, if the first noise reduction hole 3121b The air column is disturbed and moves into the first noise reduction chamber 3121a. The gas in the first noise reduction chamber 3121a is compressed and the pressure increases. At this time, the air in the first noise reduction hole 3121b is blocked from moving inward and moves outward. After passing the equilibrium position, it continues to move outward due to inertia, which reduces the pressure in the first noise reduction chamber 3121a. The air column in the first noise reduction hole 3121b stops moving outward and moves inward again, over and over again. When the frequency of the disturbance wave matches the frequency of the incoming air flow, a resonance phenomenon is formed, thereby reducing or eliminating noise, achieving the purpose of noise reduction, and improving the noise reduction effect.

[0054] It should be noted that the resonant frequency of the Helmholtz resonator depends on the geometry and volume of the resonator, so the flow area of ​​the first noise reduction hole 3121b and / or the flow area of ​​the first noise reduction cavity 3121a can be adjusted according to the noise frequency to be eliminated.

[0055] That is to say, the combination of the first noise reduction hole 3121b and the first noise reduction cavity 3121a can absorb noise of a specific frequency. In this way, the first noise reduction hole 3121b and the first noise reduction cavity 3121a can be used to absorb noise, thereby achieving the purpose of noise reduction, reducing the noise generated by the fan assembly 30 during operation to a certain extent, and improving the user experience.

[0056] Specifically, if Figure 6 As shown, the noise frequency to be eliminated S is the cross-sectional area of ​​the first noise reduction hole 3121b, S=πD 2 / 4, V is the volume of the first noise reduction cavity 3121a, L is the length of the first noise reduction hole 3121b (for details, see Figure 6 ).

[0057] Based on this, in a specific example, the first noise reduction cavity 3121a can be used to absorb noises of different frequencies by adjusting S, V or L.

[0058] Among them, the first noise reduction cavity 3121a is an independent and relatively closed space with a certain volume, and the first noise reduction hole 3121b can be a circular hole located on the cavity wall of the first noise reduction cavity 3121a. The diameter and length of the first noise reduction hole 3121b and the volume of the first noise reduction cavity 3121a need to be calculated based on the absorbed noise frequency, and the shape and extension direction of the first noise reduction hole 3121b can be changed arbitrarily, and it is only necessary to ensure that the cross-sectional area of ​​the first noise reduction hole 3121b is consistent with the calculated result.

[0059] Specifically, it is said that the multiple first noise reduction cavities 3121a defined between each first air duct wall 3121 and the corresponding first cover plate 32 are regularly arranged to form a complete sound absorption structure, and the acoustic impedance Z of the sound absorption structure satisfies:

[0060] Among them, Z HH The acoustic impedance Z of the single first noise reduction cavity 3121a is represented by n, and the ordinal number of the first noise reduction cavity 3121a is represented by n. HH satisfy:

[0061]

[0062] Wherein, j represents the imaginary part of the complex number, j=sqrt(-1), ρ0 is the air density, c0 is the speed of sound in air, ω is the circular frequency of noise, and η is the air dynamic viscosity. ca 、c ca and k ca represent the density, sound speed and wave number of the air in the first noise reduction chamber 3121a, respectively, av , Ψ va and Ψ ha are the wave number, viscosity term and thermal term of the annular constriction under narrow acoustics, γ is the specific heat of air, δ is the sound mass correction coefficient, and τ is the sound volume correction coefficient.

[0063] A is the surface area of ​​the first noise reduction cavity 3121a. For example, A is the surface area of ​​the first cover plate 32. The frequency range that has a greater impact on the noise value is 400Hz-2000Hz. Here, the volume of the first noise reduction cavity 3121a is defined as V, and the cross-sectional area of ​​a single first noise reduction hole 3121b of the first noise reduction cavity 3121a is defined as S.ap The inner surface area of ​​the opening of the first noise reduction cavity 3121a is S ca The depth of the first noise reduction hole 3121b is L, the number of the first noise reduction holes 3121b corresponding to the first noise reduction cavity 3121a is x, and the thickness of the combined structure of the first cover plate 32 and the first air duct wall 3121 is l u , its value range, i.e. the size range of the noise reduction unit, should be as follows:

[0064] 500mm 3 ≤V≤64000mm 3

[0065] 1.44mm 2 ≤S≤100mm 2

[0066] 100mm 2 ≤S ca ≤1600mm 2

[0067] l u ≤L≤V / S ca *0.5

[0068] 1≤x≤9

[0069] The vertical incident sound absorption rate α of the sound absorbing structure can be calculated by the following formula:

[0070]

[0071] Among them, through data simulation, it can be concluded that for sounds of a certain frequency, by taking values ​​of the hole cross-sectional area S of a single first noise reduction hole 3121b of the first noise reduction cavity 3121a, the depth L of the first noise reduction hole 3121b and the number x of the first noise reduction holes 3121b of the first noise reduction cavity 3121a, a larger incident sound absorption rate can be obtained, thereby making the noise reduction efficiency of the sound absorption structure higher, and the noise can be reduced by at least about 2dB without affecting the original structure of the duct air conditioner 100.

[0072] like Figure 2-Figure 5 As shown, according to some embodiments of the present invention, a partition 50 is provided in the outer shell 10 to separate the inner cavity of the outer shell 10 into a heat exchange cavity 102 and a fan cavity 101. The partition 50 defines a connecting port 51. The outlet 3103 of the air duct 3101 is connected to the heat exchange cavity 102 through the connecting port 51. The volute tongue 3111 and the two first air duct walls 3121 are all connected to the partition 50.

[0073] Therefore, by setting the partition 50, on the one hand, the outer shell 10 can be divided into a heat exchange chamber 102 and a fan chamber 101, so that the components in the outer shell 10 can be arranged in zones; on the other hand, the fan assembly 30 can be supported, specifically, the volute 31 and the motor 34 of the fan assembly 30 can be supported to ensure the installation reliability of the fan assembly 30.

[0074] like Figure 3 As shown, in some embodiments, the volute 31 includes a first shell 311 and a second shell 312. The first shell 311 and the second shell 312 are arranged vertically opposite each other and connected to jointly define an air duct 3101. The first shell 311 is detachably connected to the partition 50, and the second shell 312 is integrally formed with the partition 50. The volute tongue 3111 is located in the first shell 311, and the two first air duct walls 3121 are located in the second shell 312. In other words, the first shell 311 and the second shell 312 are formed separately, and the second shell 312 is integrally formed with the partition 50. The first shell 311 and the partition 50 are detachably connected.

[0075] In the above technical solution, by setting the volute 31 to include a first shell 311 and a second shell 312 that are separately molded, the molding difficulty of the volute 31 can be reduced, which is beneficial to improving the production efficiency of the volute 31; by integrally molding the second shell 312 and the partition 50, it is beneficial to reduce the connection steps of the second shell 312 and the partition 50, improve the assembly efficiency of the duct air conditioner 100, and also improve the structural strength of the connection position between the second shell 312 and the partition 50, thereby improving the structural reliability of the duct air conditioner 100.

[0076] like Figure 2 and Figure 7 As shown, in some embodiments, the volute 31 further includes a second air duct wall 3122, which is arranged vertically opposite to the volute tongue 3111 and connected between the two first air duct walls 3121, and the first air duct walls 3121 are connected to the partition 50. In this way, the volute tongue 3111, the two first air duct walls 3121, and the second air duct wall 3122 can define the outlet 3103 of the air duct 3101, and the shape of the outlet 3103 of the air duct 3101 can be substantially rectangular, which has a simple structure, is convenient to form, and is easy to implement.

[0077] like Figure 7 As shown, in some examples, the second air duct wall 3122 is suitable for defining a second noise reduction cavity 3122a, and a second noise reduction hole is provided on the second air duct wall 3122, which connects the second noise reduction cavity 3122a and the outlet 3103 of the air duct 3101.

[0078] For example, the second air duct wall 3122 itself defines a second noise reduction chamber 3122a. For example, the second air duct wall 3122 and the housing 10 define the second noise reduction chamber 3122a. For example, a second cover plate 61 is provided on the outer side of the second air duct wall 3122. The second cover plate 61 is provided between the second air duct wall 3122 and the housing 10, and the second air duct wall 3122 and the second cover plate 61 define the second noise reduction chamber 3122a therebetween.

[0079] In the above technical solution, the second air duct wall 3122 can participate in forming a second noise reduction chamber 3122a, and the second noise reduction chamber 3122a and the outlet 3103 of the air duct 3101 can be connected through the second noise reduction hole. When the air flow flows to the outlet 3103 of the air duct 3101, the sound waves can enter the second noise reduction chamber 3122a through the second noise reduction hole. When the sound waves enter the second noise reduction chamber 3122a, they will collide with the chamber wall of the second noise reduction chamber 3122a and generate reflections. These reflected sound waves will interfere with the incident sound waves to form a complex sound field distribution. At certain frequencies, the second noise reduction chamber 3122a will produce a resonance effect, causing the sound waves to be attenuated in the second noise reduction chamber 3122a, thereby achieving the effect of noise reduction.

[0080] In some specific examples, a second noise reduction cavity 3122a is defined between the second air duct wall 3122 and the top wall 11 of the outer shell 10, and a second dividing rib 36 is provided between the second air duct wall 3122 and the top wall 11 of the outer shell 10 to form multiple second noise reduction cavities 3122a between the second air duct wall 3122 and the top wall 11 of the outer shell 10.

[0081] Among them, the number of second dividing ribs 36 is multiple, and the multiple second dividing ribs 36 can be arranged in a horizontal or vertical interval; or, the extension directions of at least two second dividing ribs 36 are different and the two are arranged at an angle, for example, a part of the second dividing ribs 36 extends in the horizontal direction, and the other part of the second dividing ribs 36 extends in the vertical direction, thereby defining a plurality of second noise reduction cavities 3122a arranged in the horizontal and vertical directions.

[0082] In addition, one of the second air duct wall 3122 and the top wall 11 of the outer shell 10 is integrally formed with the second dividing rib 36, and the other is abutted against the second dividing rib 36, thereby ensuring the sealing of each second noise reduction cavity 3122a after assembly, thereby ensuring the noise reduction effect of the second noise reduction cavity 3122a.

[0083] like Figure 7 As shown, in some examples, the partition 50 is suitable for defining a third noise reduction cavity 521 , and a third noise reduction hole is provided on the partition 50 , which connects the third noise reduction cavity 521 and the communication port 51 .

[0084] Illustratively, the partition 50 itself defines a third noise reduction chamber 521. Illustratively, the third noise reduction chamber 521 is defined between the partition 50 and the housing 10. Illustratively, a third cover plate 62 is provided on the outside of the partition 50. The third cover plate 62 is provided between the partition 50 and the housing 10, and the third noise reduction chamber 521 is defined between the partition 50 and the third cover plate 62.

[0085] In the above technical solution, the partition 50 can participate in forming the third noise reduction chamber 521. The third noise reduction chamber 521 and the connecting port 51 can be connected through the third noise reduction hole. When the airflow flows to the connecting port 51, the sound waves can enter the third noise reduction chamber 521 through the third noise reduction hole. When the sound waves enter the third noise reduction chamber 521, they will collide with the cavity wall of the third noise reduction chamber 521 and generate reflections. These reflected sound waves will interfere with the incident sound waves to form a complex sound field distribution. At certain frequencies, the third noise reduction chamber 521 will produce a resonance effect, causing the sound waves to be attenuated in the third noise reduction chamber 521, thereby achieving the effect of noise reduction.

[0086] In some specific examples, a third noise reduction cavity 521 is defined between the partition 50 and the top wall 11 of the outer shell 10, and a third partition rib 53 is provided between the partition 50 and the top wall 11 of the outer shell 10 to form multiple third noise reduction cavities 521 between the partition 50 and the top wall 11 of the outer shell 10.

[0087] Among them, the number of third dividing ribs 53 is multiple, and the multiple third dividing ribs 53 can be arranged at intervals in the horizontal or vertical direction; or, the extension directions of at least two third dividing ribs 53 are different and the two are arranged at an angle. For example, a part of the third dividing ribs 53 extends in the horizontal direction and the other part of the third dividing ribs 53 extends in the vertical direction, thereby defining a plurality of third noise reduction cavities 521 arranged in the horizontal and vertical directions.

[0088] In addition, one of the partition 50 and the top wall 11 of the outer shell 10 is integrally formed with the third partition rib 53, and the other is abutted against the third partition rib 53, thereby ensuring the sealing of each third noise reduction cavity 521 after assembly, thereby ensuring the noise reduction effect of the third noise reduction cavity 521.

[0089] In some specific examples, the third noise reduction cavity 521 is disposed adjacent to the second air duct wall 3122 along the circumference of the communication opening 51. Due to the airflow's Coanda effect, the airflow flows along the second air duct wall 3122 to the communication opening 51, allowing sound waves to enter the third noise reduction cavity 521 through the third noise reduction hole, thereby further reducing noise and improving the user experience.

[0090] According to some embodiments of the present invention, there are multiple volutes 31 and wind wheels 33, and the multiple wind wheels 33 are coaxially arranged and one-to-one correspondingly arranged in the multiple volutes 31. A first cover plate 32 is provided on the first air duct wall 3121 of each volute 31 to define a first noise reduction chamber 3121a.

[0091] For example, there can be two volutes 31 and two wind rotors 33, with the two volutes 31 spaced apart in the longitudinal direction. Each volute 31 includes a first air duct wall 3121 on both sides in the longitudinal direction, and each first air duct wall 3121 is provided with a first cover plate 32, so that a plurality of first noise reduction chambers 3121a are defined between each first air duct wall 3121 and the corresponding first cover plate 32. Furthermore, the fan assembly 30 also includes a motor 34 having two power output shafts, which are respectively connected to the two wind rotors 33 via two connecting shafts, so that one motor 34 can drive the two wind rotors 33 to rotate synchronously.

[0092] For example, Figure 3 As shown, the number of volutes 31 and wind rotors 33 can each be three, with the three volutes 31 spaced apart in the longitudinal direction. Each volute 31 includes a first air duct wall 3121 on both sides in the longitudinal direction, and each first air duct wall 3121 is provided with a first cover plate 32, so that a plurality of first noise reduction chambers 3121a are defined between each first air duct wall 3121 and the corresponding first cover plate 32. Furthermore, the fan assembly 30 also includes a motor 34, which has two power output shafts, each of which is connected to the two wind rotors 33 via two connecting shafts, one of which is also connected to the third wind rotor 33, so that one motor 34 can drive the three wind rotors 33 to rotate synchronously.

[0093] In the above technical solution, by setting multiple volutes 31 and wind wheels 33, the air intake volume of the fan chamber 101 can be increased, so that the duct air conditioner 100 can meet the user's needs for different air volumes; by setting a first cover plate 32 on the first air duct wall 3121 of each volute 31, a first noise reduction chamber 3121a and a first noise reduction hole 3121b can be defined near the outlet 3103 of the air duct 3101 of each volute 31, thereby achieving the purpose of sound absorption and noise reduction, so as to improve the user experience.

[0094] like Figure 7 As shown, according to some embodiments of the present invention, a cover body 63 is provided on the outside of the volute 31, and a fourth noise reduction cavity 631 is defined between the volute 31 and the cover body 63. A fourth noise reduction hole 632 is provided on the volute 31, and the fourth noise reduction hole 632 connects the fourth noise reduction cavity 631 and the air duct 3101.

[0095] Thus, by forming a fourth noise reduction chamber 631 connected to the air duct 3101, the sound waves in the air duct 3101 can enter the fourth noise reduction chamber 631 through the fourth noise reduction hole 632. After the sound waves enter the fourth noise reduction chamber 631, resonance will occur, and the sound energy will be consumed through the resonance effect, thereby achieving the purpose of sound absorption and noise reduction, which is convenient for improving the user experience.

[0096] In some embodiments, the volute 31 includes a first shell 311 and a second shell 312, which are arranged vertically opposite to each other and connected to jointly define an air duct 3101. The volute tongue 3111 of the volute 31 is located in the first shell 311, and the second air duct wall 3122 is located in the second shell 312. The volute tongue 3111 and the second air duct wall 3122 are arranged vertically opposite to each other, and the outlet of the air duct 3101 is located between the volute tongue 3111 and the second air duct wall 3122.

[0097] The cover body 63 is disposed on the outside of the first shell 311 , a fourth noise reduction cavity 631 is defined between the cover body 63 and the first shell 311 , and a fourth noise reduction hole 632 is disposed in the first shell 311 .

[0098] In some examples, at least a portion of the cover body 63 is disposed opposite to the volute tongue 3111 , so that at least a portion of the fourth noise reduction cavity 631 is defined between the cover body 63 and the volute tongue 3111 , and at least a portion of the fourth noise reduction hole 632 is disposed on the volute tongue 3111 .

[0099] When the wind wheel 33 rotates, a large noise will be generated in the area near the snail tongue 3111 at the outlet of the air duct 3101, so that a fourth noise reduction chamber 631 is defined between the cover body 63 and the snail tongue 3111, so that the sound waves at the snail tongue 3111 can enter the fourth noise reduction chamber 631 through the fourth noise reduction hole 632, and then when the sound waves enter the fourth noise reduction chamber 631, the sound waves resonate in the fourth noise reduction chamber 631 to consume the energy of the sound waves, thereby playing a noise reduction role and improving the noise reduction effect.

[0100] It should be noted that the structural size design of the second noise reduction cavity 3122a and the second noise reduction hole, the third noise reduction cavity 521 and the third noise reduction hole, the fourth noise reduction cavity 631 and the fourth noise reduction hole 632 are the same as those of the first noise reduction cavity 3121a and the first noise reduction hole 3121b, and will not be repeated here.

[0101] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0102] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may also include the first and second features not being in direct contact but being in contact via another feature between them. In the description of the present invention, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0103] Other structures and operations of the duct-type air conditioner 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0104] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0105] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A duct type air conditioner, characterized in that: include: a housing defining a heat exchange cavity and a fan cavity arranged in a transverse direction; a heat exchanger, the heat exchanger being disposed in the heat exchange cavity; a fan assembly disposed in the fan cavity and comprising a volute and a wind wheel, the volute defining an air duct, an inlet of the air duct communicating with the fan cavity, an outlet of the air duct communicating with the heat exchange cavity, the wind wheel being rotatably disposed in the air duct, and a rotation axis of the wind wheel extending longitudinally; In which, the volute includes a volute tongue and two first air duct walls, the two first air duct walls are arranged opposite to each other in the longitudinal direction, the volute tongue is connected between the two first air duct walls, the outlet of the air duct is located between the volute tongue and the two first air duct walls, a first cover plate is provided on the first air duct wall, a first noise reduction cavity is defined between the first cover plate and the first air duct wall, and the first noise reduction cavity and the outlet of the air duct are connected through a first noise reduction hole.

2. The duct type air conditioner according to claim 1, characterized in that: A first dividing rib is provided between the first air duct wall and the first cover plate to form a plurality of first noise reduction cavities between the first air duct wall and the first cover plate.

3. The duct type air conditioner according to claim 2, characterized in that: There are multiple first dividing ribs, and the multiple first dividing ribs are spaced apart in the horizontal direction or the vertical direction; Alternatively, there are multiple first dividing ribs, and at least two of the first dividing ribs extend in different directions and are arranged to intersect at an angle.

4. The duct type air conditioner according to claim 2, characterized in that: One of the first air duct wall and the first cover plate is integrally formed with the first dividing rib, and the other one is abutted against the first dividing rib.

5. The duct type air conditioner according to claim 1, characterized in that: The first cover plate is arranged on the outer side of the first air duct wall and defines a plurality of first noise reduction cavities therebetween. The first air duct wall is provided with a plurality of first noise reduction holes. Each of the first noise reduction cavities is connected to the outlet of the air duct through one or more first noise reduction holes.

6. The duct type air conditioner according to claim 1, characterized in that: A partition is provided in the shell to separate the inner cavity of the shell into the heat exchange cavity and the fan cavity, and the partition defines a communication port, and the outlet of the air duct is connected to the heat exchange cavity through the communication port; Wherein, the volute tongue and the two first air duct walls are all connected to the partition.

7. The duct type air conditioner according to claim 6, characterized in that: The volute includes a first shell and a second shell, wherein the first shell and the second shell are arranged opposite to each other in a vertical direction and connected to jointly define the air duct; The first shell is detachably connected to the partition, the second shell is integrally formed with the partition, the volute tongue is located in the first shell, and the two first air duct walls are located in the second shell.

8. The duct type air conditioner according to claim 6, characterized in that: The volute further includes a second air duct wall, which is arranged vertically opposite to the volute tongue and connected between two first air duct walls, and the first air duct wall is connected to the partition.

9. The duct type air conditioner according to claim 8, characterized in that: The second air duct wall is suitable for defining a second noise reduction cavity. The second air duct wall is provided with a second noise reduction hole. The second noise reduction hole communicates with the second noise reduction cavity and the outlet of the air duct.

10. The duct type air conditioner according to claim 8, characterized in that: The partition is suitable for defining a third noise reduction cavity. The partition is provided with a third noise reduction hole. The third noise reduction hole connects the third noise reduction cavity and the communication port.

11. The duct type air conditioner according to claim 10, characterized in that: In the circumferential direction of the communication port, the third noise reduction cavity is arranged close to the second air duct wall.

12. The duct-type air conditioner according to any one of claims 1 to 11, characterized in that: There are multiple volutes and multiple wind wheels, and the multiple wind wheels are coaxially arranged and arranged in the multiple volutes in a one-to-one correspondence; Wherein, the first air duct wall of each volute is provided with the first cover plate to define the first noise reduction cavity.

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