Air pipe type air conditioner

Abstract

The utility model discloses an air pipe type air conditioner which comprises a shell, a fan assembly and a heat exchanger, the shell defines a fan cavity and a heat exchange cavity which are arranged in the transverse direction, the shell is provided with an air inlet and an air outlet, the air inlet is communicated with the fan cavity, the air outlet is communicated with the heat exchange cavity, the fan assembly is arranged in the fan cavity, and the heat exchanger is arranged in the heat exchange cavity; a first noise reduction structure is arranged on the top wall of the heat exchange cavity and comprises a first noise reduction cavity and a first noise reduction hole, and the first noise reduction hole communicates with the first noise reduction cavity and the heat exchange cavity. According to the air pipe type air conditioner, due to the fact that the first noise reduction structure is arranged on the top wall of the heat exchange cavity, in the process that airflow flows along the top wall of the heat exchange cavity, sound waves can enter the first noise reduction cavity through the first noise reduction holes, the sound waves resonate after entering the first noise reduction cavity, sound energy is consumed through the resonance effect, and noise is reduced. Therefore, the purposes of sound absorption and noise reduction are achieved, noise reduction is achieved while the size of the air duct type air conditioner is not increased, and the use experience of a user is 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 object of the present invention is to provide a ducted air conditioner that, by providing a first noise reduction structure on the top wall of a heat exchange chamber, can reduce the noise of the airflow, thereby reducing the operating noise of the ducted air conditioner and improving the user experience.

[0004] According to an embodiment of the utility model, the duct-type air conditioner includes: an outer shell, which defines a fan cavity and a heat exchange cavity arranged in a transverse direction, and the outer shell has an air inlet and an air outlet, the air inlet is connected to the fan cavity, and the air outlet is connected to the heat exchange cavity; a fan assembly, the fan assembly is arranged in the fan cavity; a heat exchanger, the heat exchanger is arranged in the heat exchange cavity; wherein, the top wall of the heat exchange cavity is provided with a first noise reduction structure, the first noise reduction structure includes a first noise reduction cavity and a first noise reduction hole, and the first noise reduction hole connects the first noise reduction cavity and the heat exchange cavity.

[0005] According to the duct-type air conditioner of the embodiment of the present invention, a first noise reduction structure is provided on the top wall of the heat exchange chamber. In the process of the air flow flowing along the top wall of the heat exchange chamber, the sound waves can enter the first noise reduction chamber through the first noise reduction hole. After the sound waves enter the first noise reduction chamber, 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-type air conditioner, thereby improving the user experience.

[0006] According to some embodiments of the present invention, at least a portion of the heat exchanger extends obliquely from top to bottom toward the fan assembly, and the first noise reduction structure is located on the air inlet side of the heat exchanger.

[0007] In some embodiments, the fan assembly includes a volute and a wind wheel, the volute defines an air duct, the inlet of the air duct is connected to the fan cavity and the outlet of the air duct is connected to the heat exchange cavity, the wind wheel is rotatably disposed in the air duct, and the first noise reduction structure is arranged near the outlet of the air duct.

[0008] According to some embodiments of the present invention, at least a portion of the heat exchanger extends obliquely from top to bottom in a direction away from the fan assembly, and the first noise reduction structure is located on the air outlet side of the heat exchanger.

[0009] According to some embodiments of the present invention, there are multiple first noise reduction cavities and multiple first noise reduction holes, and each first noise reduction cavity corresponds to and is connected to at least one first noise reduction hole.

[0010] According to some embodiments of the present invention, the top wall of the heat exchange cavity includes a wall body and a noise reduction component. The noise reduction component is provided on the wall body, and the noise reduction component participates in forming the first noise reduction cavity.

[0011] In some embodiments, the noise reduction component is fixed to the wall body by fasteners, bonding or a clamping structure.

[0012] In some embodiments, the length direction of the heat exchanger extends longitudinally, the length direction of the noise reduction component is consistent with the length direction of the heat exchanger, and the two ends of the length direction of the noise reduction component extend to positions close to the two ends of the length direction of the heat exchanger respectively.

[0013] In some examples, there are multiple first noise reduction cavities, and the multiple first noise reduction cavities are arranged in the horizontal direction and / or the vertical direction.

[0014] In some embodiments, the noise reduction component is disposed on the inner side of the wall body, and the first noise reduction cavity is defined by the noise reduction component itself or between the noise reduction component and the wall body, and the first noise reduction hole is disposed in the noise reduction component.

[0015] In some examples, the noise reduction member is formed into a rectangular structure, with a width direction of the noise reduction member extending along the transverse direction and a length direction of the noise reduction member extending along the length direction of the heat exchanger.

[0016] In some examples, a partition extending vertically is provided in the outer shell, the partition divides the inner cavity of the outer shell into the fan cavity and the heat exchange cavity, the partition has a connecting port, and the connecting port connects between the outlet of the fan assembly and the heat exchange cavity; wherein the noise reduction component is located between the partition and the heat exchanger, and the noise reduction component is abutted against the side of the partition facing the heat exchange cavity.

[0017] In some specific examples, the fan assembly includes a volute and a wind wheel, the volute defines an air duct, the inlet of the air duct is connected to the fan cavity and the outlet of the air duct is connected to the heat exchange cavity, and the wind wheel is rotatably disposed in the air duct; wherein, the volute includes a first shell and a second shell, the second shell is disposed above the first shell and the air duct is defined therebetween, the volute tongue of the volute is located on the first shell, and the second shell is integrally formed with the partition.

[0018] 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

[0019] 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:

[0020] Figure 1 This is a schematic structural diagram of a duct-type air conditioner according to an embodiment of the present utility model;

[0021] Figure 2 It is along Figure 1 Structural cross-section view along line AA;

[0022] Figure 3 yes Figure 2 An enlarged view of part B shown in ;

[0023] Figure 4 This is a schematic diagram of the internal structure of a duct-type air conditioner according to an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the principle of the Helmholtz resonator.

[0025] Reference numerals:

[0026] Duct air conditioner 100,

[0027] Housing 10, fan chamber 101, heat exchange chamber 102, air inlet 103, air outlet 104, top wall 11, wall body 111, noise reduction member 112, noise reduction shell 1121, separation rib 1122, first noise reduction chamber 113, first noise reduction hole 114,

[0028] Heat exchanger 20, air inlet side 21, air outlet side 22,

[0029] Fan assembly 30, volute 31, air duct 310, first housing 311, second housing 312, volute tongue 3121, wind wheel 32,

[0030] Partition 50 and communication port 51 . DETAILED DESCRIPTION

[0031] 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.

[0032] Reference below Figure 1-Figure 5 A duct-type air conditioner 100 according to an embodiment of the present invention is described.

[0033] like Figures 1-4 As shown, the ducted air conditioner 100 according to the embodiment of the present invention includes a housing 10, a fan assembly 30 and a heat exchanger 20. The housing 10 defines a fan cavity 101 and a heat exchange cavity 102. The fan cavity 101 and the heat exchange cavity 102 are arranged in a horizontal direction (such as Figure 2 The housing 10 has an air inlet 103 and an air outlet 104. The air inlet 103 is connected to the fan cavity 101, and the air outlet 104 is connected to the heat exchange cavity 102. The fan assembly 30 is arranged in the fan cavity 101, and the heat exchanger 20 is arranged in the heat exchange cavity 102.

[0034] When the duct air conditioner 100 is in operation, the fan assembly 30 can drive the air outside the casing 10 into the fan chamber 101 from the air inlet 103, and after being pressurized by the fan assembly 30, it is transported to the heat exchange chamber 102 for heat exchange with the heat exchanger 20, and finally discharged from the air outlet 104 and sent to the indoor space to adjust the temperature of the indoor space.

[0035] The top wall 11 of the heat exchange chamber 102 is provided with a first noise reduction structure, which includes a first noise reduction chamber 113 and a first noise reduction hole 114. The first noise reduction hole 114 connects the first noise reduction chamber 113 and the heat exchange chamber 102. Airflow can flow along the surface of the top wall 11 of the heat exchange chamber 102, allowing sound waves to enter the first noise reduction chamber 113 through the first noise reduction hole 114. When the sound waves enter the first noise reduction chamber 113, they collide with the chamber wall of the first noise reduction chamber 113 and generate reflections. These reflected sound waves interfere with the incident sound waves, forming a complex sound field distribution. At certain frequencies, the first noise reduction chamber 113 will produce a resonance effect, causing the sound waves to be attenuated within the first noise reduction chamber 113, thereby achieving a noise reduction effect.

[0036] Therefore, according to the duct air conditioner 100 of the embodiment of the present invention, a first noise reduction structure is set on the top wall 11 of the heat exchange chamber 102. In the process of the air flow flowing along the top wall 11 of the heat exchange chamber 102, the sound waves can enter the first noise reduction chamber 113 through the first noise reduction hole 114. After the sound waves enter the first noise reduction chamber 113, 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.

[0037] In some embodiments, the flow area of ​​the first noise reduction hole 114 is smaller than the flow area of ​​the first noise reduction cavity 113. This allows the first noise reduction hole 114 and the first noise reduction cavity 113 to cooperate to form a Helmholtz resonator. In this way, when air flows from the first noise reduction hole 114 into the first noise reduction cavity 113, since the flow area of ​​the first noise reduction cavity 113 is larger than the flow area of ​​the first noise reduction hole 114, the flow velocity of the air in the first noise reduction cavity 113 is much smaller than the flow velocity of the local airflow in the center of the first noise reduction cavity 113, thereby forming a more violent shear flow in the first noise reduction cavity 113, accompanied by unstable disturbance waves. At the same time, if the air column in the first noise reduction hole 114 is affected When the disturbance moves into the first noise reduction chamber 113, the gas in the first noise reduction chamber 113 is compressed and the pressure increases. At this time, the air in the first noise reduction hole 114 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 113. In turn, the air column in the first noise reduction hole 114 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.

[0038] 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 114 and / or the flow area of ​​the first noise reduction cavity 113 can be adjusted according to the frequency of the noise to be eliminated.

[0039] That is to say, the combination of the first noise reduction hole 114 and the first noise reduction cavity 113 can absorb noise of a specific frequency. In this way, the first noise reduction hole 114 and the first noise reduction cavity 113 can be used to absorb noise, thereby achieving the purpose of noise reduction, reducing the noise generated by the fan assembly 3030 during operation to a certain extent, and improving the user experience.

[0040] Specifically, if Figure 5 As shown, the noise frequency to be eliminated S is the cross-sectional area of ​​the first noise reduction hole 114, S=πD 2 / 4, V is the volume of the first noise reduction cavity 113, L is the length of the first noise reduction hole 114 (for details, see Figure 5 ).

[0041] Based on this, in a specific example, the first noise reduction cavity 113 can be used to absorb noises of different frequencies by adjusting S, V or L.

[0042] Among them, the first noise reduction cavity 113 is an independent and relatively closed space with a certain volume, and the first noise reduction hole 114 can be a circular hole located on the cavity wall of the first noise reduction cavity 113. The diameter and length of the first noise reduction hole 114 and the volume of the first noise reduction cavity 113 need to be calculated based on the absorbed noise frequency, and the shape and extension direction of the first noise reduction hole 114 can be changed arbitrarily, and it is only necessary to ensure that the cross-sectional area of ​​the first noise reduction hole 114 is consistent with the calculated result.

[0043] Specifically, it is said that the multiple first noise reduction cavities 113 are regularly arranged to form a complete sound absorption structure, and the acoustic impedance Z of the sound absorption structure satisfies:

[0044] Among them, Z HH The acoustic impedance Z of the single first noise reduction cavity 113 is represented by n, and the ordinal number of the first noise reduction cavity 113 is represented by n. HH satisfy:

[0045]

[0046] Where j represents the imaginary part of the complex number, j = sqrt(-1), ρ0 is the air density, c0 is the speed of sound in the air, ω is the circular frequency of the 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 113, respectively, k ap , 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.

[0047] A is the surface area of ​​the first noise reduction cavity 113. For example, A is the surface area of ​​the top wall 11 of the heat exchange cavity 102. The frequency range that has a greater impact on the noise value is 400Hz-2000Hz. Here, the volume of the first noise reduction cavity 113 is defined as V, and the cross-sectional area of ​​a single first noise reduction hole 114 of the first noise reduction cavity 113 is defined as S. ap The inner surface area of ​​the opening of the first noise reduction cavity 113 is S caThe depth of the first noise reduction hole 114 is L, the number of the first noise reduction holes 114 corresponding to the first noise reduction cavity 113 is x, and the thickness of the top wall 11 of the heat exchange cavity 102 is l u , its value range, i.e. the size range of the noise reduction unit, should be as follows:

[0048] 500mm 3 ≤V≤64000mm 3

[0049] 1.44mm 2 ≤S≤100mm 2

[0050] 100mm 2 ≤S ca ≤1600mm 2

[0051] l u ≤L≤V / S ca *0.5

[0052] 1≤x≤9

[0053] The vertical incident sound absorption rate α of the sound absorbing structure can be calculated by the following formula:

[0054]

[0055] 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 114 of the first noise reduction cavity 113, the depth L of the first noise reduction hole 114 and the number x of the first noise reduction holes 114 of the first noise reduction cavity 113, 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.

[0056] like Figure 2 As shown, according to some embodiments of the present invention, at least a portion of the heat exchanger 20 extends obliquely from top to bottom toward the direction close to the fan assembly 30 , and the first noise reduction structure is located on the air inlet side 21 of the heat exchanger 20 .

[0057] That is, in the transverse direction of the housing 10 , the first noise reduction structure is located between the fan assembly 30 and the heat exchanger 20 , and in the airflow direction, the first noise reduction structure is located between the outlet of the fan assembly 30 and the upstream of the heat exchanger 20 .

[0058] Since the air flow has a wall attachment effect, at least part of the air flow located on the air inlet side 21 of the heat exchanger 20 can flow along the top wall 11 of the heat exchange cavity 102, so that the sound waves can enter the first noise reduction cavity 113 through the first noise reduction hole 114. When the sound waves enter the first noise reduction cavity 113, they will collide with the cavity wall of the first noise reduction cavity 113 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 first noise reduction cavity 113 will produce a resonance effect, causing the sound waves to be attenuated in the first noise reduction cavity 113, thereby achieving the effect of noise reduction.

[0059] like Figure 2 As shown, in some embodiments, the fan assembly 30 includes a volute 31 and a wind wheel 32. The volute 31 defines an air duct 310. The inlet of the air duct 310 is connected to the fan cavity 101, and the outlet of the air duct 310 is connected to the heat exchange cavity 102. The wind wheel 32 is rotatably disposed in the air duct 310, and the first noise reduction structure is disposed near the outlet of the air duct 310.

[0060] Specifically, when the rotor 32 rotates at high speed, airflow passes over the blades. Due to the viscous friction of air molecules, the airflow, which has a certain speed, interacts with the relatively stationary airflow behind the blades, 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 rotor 32 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 rotor 32 rotates, the airflow in the blade outlet area 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 from the outlet of the air duct 310 along with the airflow. Furthermore, the volute tongue 3121 is typically positioned near the outlet of the air duct 310, and higher noise levels near the volute tongue 3121 are easily transmitted into the room through the outlet of the air duct 310.

[0061] Therefore, in the above technical solution, by setting the first noise reduction structure at a position close to the outlet of the air duct 310, the first noise reduction structure can timely absorb the airflow noise at the outlet of the air duct 310, thereby reducing the transmission of noise and improving the user experience.

[0062] In some embodiments not shown in the figures, at least a portion of the heat exchanger 20 extends obliquely from top to bottom in a direction away from the fan assembly 30, and the first noise reduction structure is located on the air outlet side 22 of the heat exchanger 20. That is, in the lateral direction of the housing 10, the heat exchanger 20 is located between the fan assembly 30 and the first noise reduction structure, and in the direction of airflow, the first noise reduction structure is located downstream of the heat exchanger 20.

[0063] Since the air flow has a wall attachment effect, after the air flow exchanges heat with the heat exchanger 20, at least part of the air flow on the air outlet side 22 of the heat exchanger 20 can flow along the top wall 11 of the heat exchange cavity 102, so that the sound waves can enter the first noise reduction cavity 113 through the first noise reduction hole 114. When the sound waves enter the first noise reduction cavity 113, they will collide with the cavity wall of the first noise reduction cavity 113 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 first noise reduction cavity 113 will produce a resonance effect, causing the sound waves to be attenuated in the first noise reduction cavity 113, thereby achieving the effect of noise reduction.

[0064] like Figure 3 and Figure 4 As shown, according to some embodiments of the present invention, there are multiple first noise reduction cavities 113 and multiple first noise reduction holes 114 , and each first noise reduction cavity 113 corresponds to and is connected to at least one first noise reduction hole 114 .

[0065] For example, the number of first noise reduction cavities 113 and the number of first noise reduction holes 114 can be equal, multiple first noise reduction cavities 113 and multiple first noise reduction holes 114 are connected one-to-one, and multiple first noise reduction cavities 113 can be arranged horizontally and / or vertically.

[0066] For example, the number of first noise reduction holes 114 can be greater than the number of first noise reduction cavities 113, and each first noise reduction cavity 113 corresponds to and is connected with multiple first noise reduction holes 114; or, a part of the first noise reduction cavities 113 corresponds to and is connected with multiple first noise reduction holes 114, and another part of the first noise reduction cavities 113 is connected with one first noise reduction hole 114.

[0067] Therefore, by providing multiple first noise reduction chambers 113 and multiple first noise reduction holes 114, it is beneficial to improve the noise reduction effect of the airflow in the heat exchange chamber 102, and further enhance the user experience.

[0068] like Figure 3As shown, according to some embodiments of the present invention, the top wall 11 of the heat exchange chamber 102 includes a wall body 111 and a noise reduction member 112. The noise reduction member 112 is disposed on the wall body 111 and helps to define a first noise reduction chamber 113. In other words, the noise reduction member 112 can define the first noise reduction chamber 113 by itself, or the first noise reduction chamber 113 can be defined between the noise reduction member 112 and the wall body 111. The noise reduction member 112 and the wall body 111 can be formed separately.

[0069] Therefore, by setting the top wall 11 of the heat exchange chamber 102 to include a wall body 111 and a noise reduction component 112, it is helpful to reduce the difficulty of forming the wall body 111 and the noise reduction component 112, thereby reducing production costs and improving production efficiency.

[0070] In some embodiments, the noise reduction member 112 is fixed to the wall body 111 by fasteners, bonding, or a clamping structure.

[0071] For example, the noise reduction member 112 can be fixed to the wall body 111 by fasteners. Specifically, the noise reduction member 112 is provided with a plurality of first connection holes, and the wall body 111 is provided with a plurality of second connection holes. The positions of the plurality of first connection holes and the plurality of second connection holes correspond one to one. The noise reduction member 112 can be fixed to the wall body 111 by a plurality of fasteners, and each fastener is provided through the first connection hole and the second connection hole at a corresponding position.

[0072] For example, the noise reduction member 112 may be fixed to the wall body 111 by bonding via an adhesive layer.

[0073] For example, the noise reducing member 112 can be fixed to the wall body 111 by a snap-fit ​​structure. Specifically, the noise reducing member 112 is provided with a first snap-fit ​​portion, and the wall body 111 is provided with a second snap-fit ​​portion. The first snap-fit ​​portion and the second snap-fit ​​portion are snap-fitted together, so that the noise reducing member 112 and the wall body 111 are snap-fitted together.

[0074] In which, the noise reduction component 112 can protrude from the side surface of the wall body 111 facing the heat exchanger 20; or, the side surface of the wall body 111 facing the heat exchanger 20 is flush with the side surface of the noise reduction component 112 facing the heat exchanger 20. For example, the side of the wall body 111 facing the heat exchanger 20 has an installation groove, and the noise reduction component 112 is arranged in the installation groove, so that the side surface of the noise reduction component 112 facing the heat exchanger 20 is flush with the side surface of the wall body 111 facing the heat exchanger 20.

[0075] In the above technical solution, the noise reduction member 112 is fixed to the wall body 111 by a fastener or a clamping mechanism, which facilitates the installation, disassembly and maintenance of the noise reduction member 112 .

[0076] In some embodiments, the length direction of the heat exchanger 20 is longitudinal (eg Figure 1 The length direction of the noise reducer 112 is consistent with the length direction of the heat exchanger 20, and the two ends of the length direction of the noise reducer 112 extend to positions close to the two ends of the length direction of the heat exchanger 20 respectively.

[0077] Such a setting enables the first noise reduction structure to reduce the noise of the airflow near the heat exchanger 20 in the length direction of the heat exchanger 20, thereby improving the noise reduction effect of the first noise reduction structure on the airflow in the heat exchange cavity 102, and further improving the user experience of the duct air conditioner 100.

[0078] In some examples, there are multiple first noise reduction cavities 113, and the multiple first noise reduction cavities 113 are arranged horizontally and / or vertically. The multiple first noise reduction cavities 113 are regularly arranged on the top wall 11 of the heat exchange cavity 102 to form a complete first noise reduction structure, which helps to increase the distribution area of ​​the first noise reduction structure on the top wall 11 of the heat exchange cavity 102, thereby further enhancing the noise reduction effect of the first noise reduction structure on the airflow within the heat exchange cavity 102.

[0079] like Figure 3 and Figure 4 As shown, in some embodiments, the noise reduction member 112 is disposed on the inner side of the wall body 111, and a first noise reduction cavity 113 is defined between the noise reduction member 112 itself or between the noise reduction member 112 and the wall body 111. A first noise reduction hole 114 is provided in the noise reduction member 112. By disposing the noise reduction member 112 on the inner side of the wall body 111, the appearance of the ducted air conditioner 100 is not affected while ensuring the noise reduction effect.

[0080] Specifically, if Figure 4 As shown, in this embodiment, the noise reduction component 112 itself defines a first noise reduction cavity 113 . The noise reduction component 112 includes a noise reduction shell 1121 and separation ribs 1122 . The separation ribs 1122 are arranged in the noise reduction shell 1121 to separate the inner cavity of the noise reduction shell 1121 into multiple first noise reduction cavities 113 .

[0081] In some examples, there may be multiple dividing ribs 1122, with the multiple dividing ribs 1122 arranged at intervals. For example, the multiple dividing ribs 1122 may be arranged in a transverse direction, with each dividing rib 1122 extending in a longitudinal direction, thereby dividing the inner cavity of the noise reduction shell 1121 into multiple first noise reduction chambers 113 arranged in a transverse direction. For another example, the multiple dividing ribs 1122 may be arranged in a longitudinal direction, with each dividing rib 1122 extending in a transverse direction, thereby dividing the inner cavity of the noise reduction shell 1121 into multiple first noise reduction chambers 113 arranged in a longitudinal direction.

[0082] In other examples, the number of separating ribs 1122 can be multiple, at least one separating rib 1122 extends in the transverse direction, and at least one separating rib 1122 extends in the longitudinal direction, and the two are arranged crosswise, thereby dividing the inner cavity of the noise reduction shell 1121 into multiple first noise reduction cavities 113.

[0083] like Figure 4 As shown, in some examples, the noise reduction member 112 is formed into a rectangular structure, with the width of the noise reduction member 112 extending in the transverse direction and the length extending along the length of the heat exchanger 20. By configuring the noise reduction member 112 as a regular rectangular structure, the difficulty of forming the noise reduction member 112 can be reduced, and the multiple first noise reduction cavities 113 can be arranged in a regular manner, which helps to increase the distribution area of ​​the first noise reduction cavities 113, thereby improving the noise reduction effect of the first noise reduction structure on the airflow within the heat exchange cavity 102.

[0084] like Figure 2 and Figure 4 As shown, in some examples, a partition 50 extending vertically is provided in the housing 10, and the partition 50 divides the inner cavity of the housing 10 into a fan cavity 101 and a heat exchange cavity 102. The partition 50 has a connecting port 51, and the connecting port 51 is connected between the outlet of the fan assembly 30 and the heat exchange cavity 102. The noise reduction member 112 is located between the partition 50 and the heat exchanger 20, and the noise reduction member 112 is against the side of the partition 50 facing the heat exchange cavity 102.

[0085] Thus, by abutting the noise reducing member 112 against the partition member 50 , the partition member 50 can be used to position and install the noise reducing member 112 , which is beneficial to improving the installation efficiency of the noise reducing member 112 .

[0086] In some specific examples, the fan assembly 30 includes a volute 31 and a wind wheel 32. The volute 31 defines an air duct 310. The inlet of the air duct 310 is connected to the fan cavity 101, and the outlet of the air duct 310 is connected to the heat exchange cavity 102. The wind wheel 32 is rotatably disposed in the air duct 310.

[0087] The volute 31 includes a first shell 311 and a second shell 312. The second shell 312 is disposed above the first shell 311 and defines an air duct 310 therebetween. The volute tongue 3121 of the volute 31 is located on the first shell 311. The second shell 312 is integrally formed with the partition 50. Integrating the second shell 312 with the partition 50 reduces the number of components and eliminates the need for a connection between the two, thereby improving production efficiency and reducing costs. Furthermore, it improves the reliability of the connection between the second shell 312 and the partition 50.

[0088] In addition, the first shell 311 and the second shell 312 can be formed separately. Such an arrangement can reduce the difficulty of forming the volute 31, which is conducive to improving production efficiency and reducing production costs.

[0089] In some embodiments, the partition 50 is suitable for defining a second noise reduction cavity. A second noise reduction hole is provided on the partition 50 . The second noise reduction hole communicates with the second noise reduction cavity and the communication port 51 .

[0090] For example, the divider 50 itself defines a second noise reduction chamber. For example, the divider 50 and the housing 10 define a second noise reduction chamber. For example, a cover plate 62 is provided on the outside of the divider 50, and the cover plate 62 is provided between the divider 50 and the housing 10, and the second noise reduction chamber is defined between the divider 50 and the cover plate 62.

[0091] In the above technical solution, the partition 50 can participate in forming a second noise reduction cavity, and the second noise reduction cavity and the connecting port 51 can be connected through the second noise reduction hole. When the airflow flows to the connecting port 51, the sound waves can enter the second noise reduction cavity through the second noise reduction hole. When the sound waves enter the second noise reduction cavity, they will collide with the cavity wall of the second noise reduction cavity 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 second noise reduction cavity will produce a resonance effect, causing the sound waves to be attenuated in the second noise reduction cavity, thereby achieving the effect of noise reduction.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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 fan cavity and a heat exchange cavity arranged in a transverse direction, the housing having an air inlet and an air outlet, the air inlet communicating with the fan cavity, and the air outlet communicating with the heat exchange cavity; a fan assembly, the fan assembly being disposed in the fan cavity; a heat exchanger, the heat exchanger being disposed in the heat exchange cavity; Wherein, the top wall of the heat exchange cavity is provided with a first noise reduction structure, the first noise reduction structure includes a first noise reduction cavity and a first noise reduction hole, and the first noise reduction hole connects the first noise reduction cavity and the heat exchange cavity.

2. The duct type air conditioner according to claim 1, characterized in that: At least a portion of the heat exchanger extends obliquely from top to bottom toward the direction close to the fan assembly, and the first noise reduction structure is located on the air inlet side of the heat exchanger.

3. The duct type air conditioner according to claim 2, characterized in that: The fan assembly includes a volute and a wind wheel, the volute defines an air duct, the inlet of the air duct is connected to the fan cavity and the outlet of the air duct is connected to the heat exchange cavity, the wind wheel is rotatably disposed in the air duct, and the first noise reduction structure is arranged near the outlet of the air duct.

4. The duct type air conditioner according to claim 1, characterized in that: At least a portion of the heat exchanger extends obliquely from top to bottom in a direction away from the fan assembly, and the first noise reduction structure is located on an air outlet side of the heat exchanger.

5. The duct type air conditioner according to claim 1, characterized in that: There are a plurality of the first noise reduction cavities and the first noise reduction holes, and each first noise reduction cavity corresponds to and is connected to at least one first noise reduction hole.

6. The duct type air conditioner according to claim 1, characterized in that: The top wall of the heat exchange cavity includes a wall body and a noise reduction component. The noise reduction component is arranged on the wall body, and the noise reduction component participates in forming the first noise reduction cavity.

7. The duct type air conditioner according to claim 6, characterized in that: The noise reduction component is fixed to the wall body by means of fasteners, bonding or a clamping structure.

8. The duct type air conditioner according to claim 6, characterized in that: The length direction of the heat exchanger extends in the longitudinal direction, the length direction of the noise reduction component is consistent with the length direction of the heat exchanger, and both ends of the noise reduction component in the length direction respectively extend to positions close to both ends of the length direction of the heat exchanger.

9. The duct type air conditioner according to claim 8, characterized in that: There are multiple first noise reduction cavities, and the multiple first noise reduction cavities are arranged in the horizontal direction and / or the vertical direction.

10. The duct type air conditioner according to claim 6, characterized in that: The noise reduction component is arranged on the inner side of the wall body, and the first noise reduction cavity is defined by the noise reduction component itself or between the noise reduction component and the wall body. The first noise reduction hole is arranged in the noise reduction component.

11. The duct type air conditioner according to claim 10, characterized in that: The noise reduction member is formed in a rectangular structure, and a width direction of the noise reduction member extends along the transverse direction and a length direction of the noise reduction member extends along the length direction of the heat exchanger.

12. The duct type air conditioner according to claim 10, characterized in that: A vertically extending partition is provided in the housing, the partition dividing the inner cavity of the housing into the fan cavity and the heat exchange cavity, the partition having a communication port, the communication port communicating between the outlet of the fan assembly and the heat exchange cavity; Wherein, the noise reduction component is located between the partition and the heat exchanger, and the noise reduction component abuts against a side of the partition facing the heat exchange cavity.

13. The duct type air conditioner according to claim 12, characterized in that: The fan assembly includes a volute and a wind wheel, the volute defines an air duct, the inlet of the air duct is connected to the fan cavity and the outlet of the air duct is connected to the heat exchange cavity, and the wind wheel is rotatably disposed in the air duct; The volute includes a first shell and a second shell, the second shell is arranged above the first shell and the air duct is defined therebetween, the volute tongue of the volute is located on the first shell, and the second shell is integrally formed with the partition.

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