Air pipe type air conditioner

Abstract

The air duct type air conditioner comprises a shell, a partition piece, a fan assembly, a heat exchanger and at least one flow guide piece, the partition piece is arranged in the shell so as to divide an inner cavity of the shell into a fan cavity and a heat exchange cavity which are arranged in the transverse direction, the partition piece defines a communication opening, the fan assembly is arranged in the fan cavity and defines an air duct, and the heat exchanger is arranged in the air duct. An inlet of the air duct communicates with the fan cavity, an outlet of the air duct communicates with the heat exchange cavity through the through opening, the heat exchanger is arranged in the heat exchange cavity, and the flow guide piece is arranged on the side, facing the heat exchange cavity, of the partition piece and used for guiding airflow to flow towards the heat exchanger and provided with a first noise reduction structure. According to the air pipe type air conditioner, the flow guide part is arranged to be provided with the first noise reduction structure, noise generated when the air pipe type air conditioner works can be reduced on the premise that the size of the whole air conditioner is not increased, and the air pipe type air conditioner has the advantages of being small in occupied space, low in working noise and the like.

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, the present invention provides a ducted air conditioner that, by providing a first noise reduction structure on a flow guide, 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; a partition, the partition is arranged in the outer shell to divide the inner cavity of the outer shell into a fan cavity and a heat exchange cavity arranged in the transverse direction, and the partition defines a connecting port; a fan assembly, the fan assembly is arranged in the fan cavity and defines an air duct, the inlet of the air duct is connected with the fan cavity, and the outlet of the air duct is connected with the heat exchange cavity through the connecting port; a heat exchanger, the heat exchanger is arranged in the heat exchange cavity; at least one flow guide, the flow guide is arranged on a side of the partition facing the heat exchange cavity, and is used to guide the airflow toward the heat exchanger, and the flow guide has a first noise reduction structure.

[0005] According to the duct-type air conditioner of the embodiment of the present invention, by setting the guide member to have a first noise reduction structure, it is possible to avoid the first noise reduction structure occupying too much space. At the same time, in the process of the air flow flowing along the guide member toward the heat exchanger, the first noise reduction structure can also be used to absorb sound and reduce noise, so as to achieve noise reduction without increasing the size of the duct-type air conditioner, thereby making the duct-type air conditioner have the advantages of small space occupation and low working noise, thereby improving the user experience.

[0006] In some embodiments, 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.

[0007] In some embodiments, 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.

[0008] In some embodiments, the guide member is arranged near the connecting port and has a guide surface, which extends gradually from the connecting port to the heat exchanger in the transverse direction away from the center of the connecting port, and the first noise reduction hole is arranged on the guide surface.

[0009] In some embodiments, the fan assembly includes a first volute, a first wind wheel arranged in the first volute, a second volute and a second wind wheel arranged in the second volute, and the first volute and the second volute are arranged in the longitudinal direction; wherein the number of the connecting ports is multiple, and includes a first connecting port and a second connecting port arranged in the longitudinal direction, the first connecting port connects the outlet of the air duct defined by the first volute and the heat exchange chamber, the second connecting port connects the outlet of the air duct defined by the second volute and the heat exchange chamber, at least one of the guide members is a first guide member, and the first guide member is located between the first connecting port and the second connecting port.

[0010] In some embodiments, the first flow guide member has two first flow guide surfaces arranged opposite to each other in the longitudinal direction, and the two first flow guide surfaces extend gradually toward each other in the transverse direction along the direction close to the heat exchanger, and each first flow guide surface is provided with the first noise reduction hole.

[0011] In some embodiments, the first flow guide member includes two flow guides, which are arranged in the longitudinal direction; wherein each of the flow guides defines a plurality of the first noise reduction cavities, and the two flow guides have the first flow guide surface on a side away from each other.

[0012] In some embodiments, the length direction of each of the guide bodies is inclined relative to the transverse direction and the longitudinal direction, one end of the two guide bodies in the length direction is connected to the partition and the other end in the length direction is connected, so that the two guide bodies are arranged at a preset angle.

[0013] In some embodiments, each of the flow guides includes: a fixed shell, which is fixed to the partition and has an opening on one side of the fixed shell; a cover plate, which closes the opening and has a plurality of first noise reduction holes arranged on the cover plate; and a separating rib, which is arranged between the fixed shell and the cover plate to form a plurality of first noise reduction cavities between the fixed shell and the cover plate.

[0014] In some embodiments, each of the first volute and the second volute includes a first shell and a second shell, the first shell and the second shell are arranged vertically opposite to each other and define the air duct therebetween, the first shell has a volute tongue near the partition and the volute tongue is mechanically connected to the partition, and the second shell is integrally formed with the partition.

[0015] In some embodiments, the fan assembly also includes a third volute, a third wind wheel arranged in the third volute, and the second volute is located between the first volute and the third volute in the longitudinal direction; wherein, at least one of the connecting ports is a third connecting port, and the third connecting port connects the outlet of the air duct defined by the third volute and the heat exchange chamber, and at least one of the flow guide members is a second flow guide member, and the second flow guide member is located between the second connecting port and the third connecting port.

[0016] In some embodiments, the second flow guide member has two second flow guide surfaces arranged opposite to each other in the longitudinal direction, and the two second flow guide surfaces extend gradually toward each other in the transverse direction along the direction close to the heat exchanger, and each second flow guide surface is provided with the first noise reduction hole.

[0017] In some embodiments, the structure of the second flow guide is the same as that of the first flow guide.

[0018] In some embodiments, the first wind wheel, the second wind wheel and the third wind wheel are coaxially arranged, and the wind turbine assembly further includes a motor, the first wind wheel is connected to the first output shaft of the motor through a first connecting shaft, the second wind wheel is connected to the second output shaft of the motor through a second connecting shaft, and the second connecting shaft is also connected to the third wind wheel.

[0019] In some embodiments, each of the first volute, the second volute and the third volute includes a first shell and a second shell, the first shell and the second shell are arranged vertically opposite to each other and define the air duct therebetween, the first shell has a volute tongue near the partition and the volute tongue is mechanically connected to the partition, and the second shell is integrally formed with the partition.

[0020] In some embodiments, the flow guide has an avoidance portion for avoiding the heat exchanger and / or the heating element in the heat exchange cavity.

[0021] In some embodiments, the partition is provided with a second noise reduction structure, the second noise reduction structure includes a second noise reduction cavity and a second noise reduction hole, and the second noise reduction hole connects the second noise reduction cavity and the communication port.

[0022] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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:

[0024] Figure 1 This is a schematic diagram of the partial structure of a duct-type air conditioner in some embodiments of the first aspect of the present utility model.

[0025] Figure 2 for Figure 1 Magnified view of region I in the middle.

[0026] Figure 3 This is a cross-sectional view of a duct-type air conditioner according to some embodiments of the first aspect of the present utility model.

[0027] Figure 4 for Figure 1 A top view of the ducted air conditioner.

[0028] Figure 5 for Figure 4 Sectional view along line AA.

[0029] Figure 6 Schematic diagram of a duct-type air conditioner according to some embodiments of the second aspect of the present utility model.

[0030] Figure 7 for Figure 6 Schematic diagram of the ducted air conditioner with some structures omitted.

[0031] Figure 8 for Figure 7 Schematic diagram of the duct air conditioner from another angle.

[0032] Figure 9 This is a schematic diagram of the principle of the Helmholtz resonator.

[0033] Reference numerals:

[0034] 1000, duct air conditioner;

[0035] 200, housing; 210, heat exchange chamber; 220, fan chamber;

[0036] 300, separator; 310, communication port; 311, first communication port; 312, second communication port; 313, third communication port;

[0037] 100, fan assembly; 111, air duct; 1111, outlet; 112, first volute; 114, second volute; 115, second wind wheel; 116, first housing; 118, volute tongue; 117, second housing; 119, third volute; 700, motor;

[0038] 400, heat exchanger;

[0039] 600, flow guide member; 610, flow guide surface; 620, first flow guide member; 621, first flow guide surface; 622, flow guide body; 6221, fixed shell; 6222, cover plate; 500, first noise reduction structure; 113, first noise reduction hole; 630, avoidance portion; 631, first avoidance portion; 632, second avoidance portion. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] When the duct air conditioner is running, the rotation of the wind wheel works to suck the air outside the duct air conditioner into the wind wheel, and then the air is pressurized by the wind wheel and sent to the room to form a circulation. In this process, the high-speed rotation of the wind wheel causes the air flow to flow through the blades. Due to the influence of the viscous friction of air molecules, the air flow with a certain speed interacts with the relatively static air flow behind the blades, forming an air flow with vortices in the downstream area of ​​the blades. These vortices are constantly changing and falling off. The pressure at the center of each vortex is lower than the pressure of the surrounding medium. When a vortex falls off, a pressure jump occurs in the turbulent airflow. These jump pressures propagate outward through the surrounding medium and act on the blades. When the pressure pulsation in the turbulent flow contains audible frequency components and the intensity is large enough, noise is radiated to form turbulent noise.

[0043] At the same time, when the wind wheel rotates, the blades sweep the air at the adjacent position. Due to the mutuality of forces, the gas medium is affected by the blades, generating a periodic pressure field and emitting noise; when the airflow flows through the blades, the boundary layers of the suction surface and the pressure surface at the trailing edge converge to form a wake area. In the wake area, the pressure and speed of the airflow are much lower than those in the mainstream area. When the wind wheel rotates, the airflow in the blade outlet area is very uneven. This uneven potential flow field periodically acts on the surrounding obstacles, which will produce noise similar to the sound produced by stroking the strings of a guitar, increasing the noise generated during the operation of the ducted air conditioner and reducing the user experience.

[0044] In order to solve the above problems, sound-absorbing cotton is usually installed in duct air conditioners to reduce noise. The sound-absorbing cotton usually has a porous structure. When sound waves enter these holes, they will rub against the air inside, thereby converting the sound energy into heat energy to absorb medium and high frequency sound energy and achieve the purpose of noise reduction.

[0045] However, since sound-absorbing cotton is a solid material with a porous structure, not a pure solid material, and because the wavelength of low-frequency noise is relatively long, low-frequency noise can easily bypass the sound-absorbing cotton and continue to propagate, which leads to the sound-absorbing cotton's limited absorption of low-frequency noise, resulting in the ducted air conditioner still making a lot of noise during operation.

[0046] To solve the above problems, the present application proposes a duct-type air conditioner 1000 .

[0047] The following describes the duct type air conditioner 1000 according to an embodiment of the present invention with reference to the accompanying drawings.

[0048] Combine Figure 1 、 Figure 3 and Figure 4 As shown, a duct-type air conditioner 1000 according to an embodiment of the present invention includes: a housing 200 , a partition 300 , a fan assembly 100 , a heat exchanger 400 and at least one air guide 600 .

[0049] Among them, combined Figure 1 、 Figure 3 and Figure 4 As shown, the partition 300 is disposed in the housing 200 to divide the inner cavity of the housing 200 into a fan cavity 220 and a heat exchange cavity 210 arranged in a transverse direction, and the partition 300 defines a communication port 310 .

[0050] Combine Figure 1 、 Figure 3 and Figure 4As shown, the fan assembly 100 is disposed within the fan cavity 220 and defines an air duct 111. The inlet of the air duct 111 communicates with the fan cavity 220, and the outlet 1111 of the air duct 111 communicates with the heat exchange cavity 210 via a communication port 310. This achieves coordinated communication between the heat exchange cavity 210 and the air duct 111, thereby allowing air in the air duct 111 to be delivered to the heat exchange cavity 210.

[0051] like Figure 3 As shown, the heat exchanger 400 is disposed in the heat exchange chamber 210. The heat exchanger 400 is used to exchange heat with the air in the heat exchange chamber 210, and the heat-exchanged air is blown to a designated area to adjust the air temperature in the designated area.

[0052] Combine Figure 1 、 Figure 2 and Figure 3 As shown, the guide member 600 is provided on a side of the partition 300 facing the heat exchange chamber 210 . The guide member 600 is used to guide the airflow toward the heat exchanger 400 . The guide member 600 has a first noise reduction structure 500 .

[0053] The guide member 600 is configured to guide the airflow toward the heat exchanger 400 so that the air entering the heat exchange cavity 210 can flow toward the heat exchanger 400 , thereby facilitating heat exchange between the heat exchanger 400 and the air in the heat exchange cavity 210 .

[0054] In a specific example, the fan assembly 100 is used to drive the airflow in the fan cavity 220 to flow toward the heat exchange cavity 210, and the guide member 600 is used to guide the airflow to flow toward the heat exchanger 400 during the flow, so that when the air flows through the heat exchange cavity 210, the air can exchange heat with the heat exchanger 400 in the heat exchange cavity 210, and the air after heat exchange is blown into the room to facilitate adjusting the indoor air temperature.

[0055] In addition, by setting the guide member 600 to have a first noise reduction structure 500, the first noise reduction structure 500 can be used to absorb the noise generated during the flow of air to achieve the purpose of noise reduction, thereby reducing the noise generated by the fan assembly 100 during operation, so that the fan assembly 100 has the advantage of low operating noise, thereby improving the user experience.

[0056] At the same time, arranging the first noise reduction structure 500 in the guide member 600 can also, to a certain extent, avoid the first noise reduction structure 500 occupying space in other positions outside the guide member 600, thereby avoiding increasing the size of the duct type air conditioner 1000, so that the duct type air conditioner 1000 has the advantage of occupying a small space.

[0057] It can be seen from the above structure that the duct type air conditioner 1000 of the embodiment of the utility model, by setting the guide member 600 to have the first noise reduction structure 500, can to a certain extent avoid the first noise reduction structure 500 occupying the space at other positions outside the guide member 600, thereby avoiding increasing the size of the duct type air conditioner 1000, so that the duct type air conditioner 1000 has the advantage of occupying a small space.

[0058] At the same time, during the flow of air, the first noise reduction structure 500 can be used to absorb the noise generated during the flow of air to achieve the purpose of noise reduction, thereby reducing the noise generated by the fan assembly 100 during operation, so that the fan assembly 100 has the advantage of low working noise and improves the user experience.

[0059] It can be understood that compared with the prior art, the present application configures the guide member 600 to have a first noise reduction structure 500, which can not only utilize the first noise reduction structure 500 to reduce noise during the flow of airflow, but also reduce the space occupied by the first noise reduction structure 500, thereby reducing the noise generated by the fan assembly 100 during operation without increasing the overall size of the fan assembly 100, so that the fan assembly 100 has the advantages of small occupation of space and low operating noise.

[0060] In some embodiments, the first noise reduction structure 500 includes a first noise reduction cavity and a first noise reduction hole 113 (the specific structure of the first noise reduction hole 113 can be found in Figure 2 ), the first noise reduction hole 113 connects the first noise reduction chamber and the heat exchange chamber 210. This ensures that the first noise reduction chamber and the heat exchange chamber 210 are connected in a coordinated manner. Thus, when air flows in the heat exchange chamber 210, noise in the heat exchange chamber 210 can enter the first noise reduction chamber through the first noise reduction hole 113. This facilitates the use of the first noise reduction hole 113 and the first noise reduction chamber to absorb noise of a specific frequency, thereby achieving the purpose of noise reduction.

[0061] In a specific example, the first noise reduction structure 500 defines a super-structure. During the flow of air, the sound waves in the heat exchange cavity 210 enter the first noise reduction cavity through the first noise reduction hole 113. When the sound waves enter the first noise reduction cavity, they collide with the cavity wall of the first noise reduction cavity and produce reflections. These reflected sound waves interfere with the incident sound waves to form a complex sound field distribution. At certain frequencies, the first noise reduction cavity will produce a resonance effect, causing the sound waves to be attenuated in the first noise reduction cavity, thereby achieving the effect of noise reduction.

[0062] In some embodiments, the first noise reduction hole 113 is arranged between the first noise reduction chamber and the heat exchange chamber 210 and respectively connects the first noise reduction chamber and the heat exchange chamber 210, so as to facilitate the use of the first noise reduction hole 113 to achieve the coordinated connection between the first noise reduction chamber and the heat exchange chamber 210, thereby reducing the difficulty of connecting the first noise reduction chamber and the heat exchange chamber 210.

[0063] It is worth noting that the present application directly utilizes the first noise reduction structure 500 to define the first noise reduction cavity and the first noise reduction hole 113, which not only reduces the difficulty of forming the first noise reduction cavity and the first noise reduction hole 113, but also helps to simplify the structure of the fan assembly 100 and reduce the manufacturing difficulty and manufacturing cost of the fan assembly 100.

[0064] In some embodiments, the first noise reduction structure 500 also includes a noise reduction net (not shown in the figure), which is fixed on the wall where the first noise reduction hole 113 is located. The mesh of the noise reduction net connects the first noise reduction hole 113 and the heat exchange chamber 210, and the aperture of the mesh is smaller than the aperture of the first noise reduction hole 113.

[0065] It should be noted that since the first noise reduction hole 113 is arranged toward the heat exchange chamber 210, the wind speed at the location of the first noise reduction hole 113 is relatively high. When the first noise reduction hole 113 is directly connected to the heat exchange chamber 210, a whistling sound will be generated when high-speed wind blows through the first noise reduction hole 113, affecting the noise reduction effect of the first noise reduction structure 500.

[0066] Based on this, the present application sets a noise reduction net on the wall where the first noise reduction hole 113 is located, and sets the aperture of the mesh of the noise reduction net to be smaller than the aperture of the first noise reduction hole 113. While achieving the connection between the first noise reduction hole 113 and the heat exchange chamber 210, the noise reduction net can also be used to eliminate the whistling sound, so as to enhance the noise reduction effect of the first noise reduction structure 500, thereby reducing the noise generated by the duct air conditioner 1000 during operation.

[0067] Of course, in some other embodiments, the whistling sound can also be reduced by reducing the aperture of the first noise reduction hole 113, but if the aperture of the first noise reduction hole 113 is too small, it will increase the difficulty of forming the first noise reduction hole 113. Therefore, the present application sets a noise reduction net on the wall where the first noise reduction hole 113 is located, which can adaptively increase the size of the first noise reduction hole 113, thereby reducing the difficulty of forming the first noise reduction hole 113.

[0068] Therefore, the above can also be understood as that by providing the noise reduction net, the difficulty of forming the first noise reduction hole 113 is reduced while the whistling sound can also be reduced.

[0069] In some embodiments, the first noise reduction hole 113 has a diameter of 1 mm to 1.5 mm, which reduces the difficulty of forming the first noise reduction hole 113 and enables the whistling sound to be effectively eliminated after the noise reduction net is provided.

[0070] In some embodiments, the noise reduction net is integrally formed with the wall where the first noise reduction hole 113 is located. For example, the noise reduction net is covered on the wall where the first noise reduction hole 113 is located using an in-mold injection molding process to reduce the difficulty of fixing the noise reduction net to the wall where the first noise reduction hole 113 is located and increase the fixing strength, thereby improving the positional stability of the noise reduction net and facilitating the noise reduction effect of the noise reduction net.

[0071] In other embodiments, the noise reduction net may also be connected to the wall where the first noise reduction hole 113 is located by welding, bonding, or clamping, etc., which is not specifically limited here.

[0072] In some embodiments, the noise reduction net is made of materials such as nylon and non-woven fabric.

[0073] In some embodiments, the flow area of ​​the first noise reduction hole 113 is smaller than the flow area of ​​the first noise reduction cavity. This allows the first noise reduction hole 113 and the first noise reduction cavity to cooperate to form a Helmholtz resonator. In this way, when air flows from the first noise reduction hole 113 into the first noise reduction cavity, since the flow area of ​​the first noise reduction cavity is larger than the flow area of ​​the first noise reduction hole 113, the flow velocity of the air in the first noise reduction cavity is much smaller than the flow velocity of the local airflow in the center of the first noise reduction cavity, thereby forming a more intense shear flow in the first noise reduction cavity, accompanied by unstable disturbance waves. At the same time, if the air column in the first noise reduction hole 113 is disturbed, The air in the first noise reduction cavity moves, and the gas in the first noise reduction cavity is compressed, and the pressure increases. At this time, the air in the first noise reduction hole 113 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 cavity. In turn, the air column in the first noise reduction hole 113 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.

[0074] 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 113 and / or the flow area of ​​the first noise reduction cavity can be adjusted according to the frequency of the noise to be eliminated.

[0075] That is to say, the combination of the first noise reduction hole 113 and the first noise reduction cavity can absorb noise of a specific frequency. In this way, the first noise reduction hole 113 and the first noise reduction cavity can be used to absorb low-frequency noise, thereby achieving the purpose of noise reduction, reducing the noise generated by the fan assembly 100 during operation to a certain extent, and improving the user experience.

[0076] Among them, the noise frequency to be eliminated S is the cross-sectional area of ​​the first noise reduction hole 113, S=πD 2 / 4; V is the volume of the first noise reduction cavity; L is the length of the first noise reduction hole 113 (for details, see Figure 9 ).

[0077] Based on this, in a specific example, the first noise reduction cavity can be used to absorb low-frequency noise by adjusting S, V or L.

[0078] Among them, the first noise reduction cavity is an independent and relatively closed space with a certain volume. The first noise reduction hole 113 can be a circular hole located on the cavity wall of the first noise reduction cavity. The diameter and length of the first noise reduction hole 113 and the volume of the first noise reduction cavity need to be calculated according to the absorbed noise frequency, and the shape and extension direction of the first noise reduction hole 113 can be changed arbitrarily. It is only necessary to ensure that the cross-sectional area of ​​the first noise reduction hole 113 is consistent with the calculated result.

[0079] Specifically, it is said that the multiple first noise reduction cavities are regularly arranged to form a complete sound absorption structure, and the acoustic impedance Z of the sound absorption structure satisfies:

[0080] Among them, Z HH The acoustic impedance of the single first noise reduction cavity is Z, and n is the ordinal number of the first noise reduction cavity. HH satisfy:

[0081]

[0082] 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 cavity, 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.

[0083] A is the surface area of ​​the surface where the first noise reduction cavity is located. For example, A is the surface area of ​​the wall where the first noise reduction hole 113 is located. The frequency range that has a greater impact on the noise value is 400Hz-2000Hz. Here, the volume V of the first noise reduction cavity is specified. The cross-sectional area of ​​a single first noise reduction hole 113 of the first noise reduction cavity is S. ap The inner surface area of ​​the opening of the first noise reduction cavity is S ca The depth of the first noise reduction hole 113 is L, the number of the first noise reduction holes 113 corresponding to the first noise reduction cavity is x, and the top wall thickness of the heat exchange cavity 210 is l u, its value range, i.e. the size range of the noise reduction unit, should be as follows:

[0084] 500mm 3 ≤V64000mm 3

[0085] 1.44mm 2 ≤S≤100mm 2

[0086] 100mm 2 ≤S ca ≤1600mm 2

[0087] l u ≤L≤V / S ca *0.5

[0088] 1≤x≤9

[0089] The vertical incident sound absorption rate α of the sound absorbing structure can be calculated by the following formula:

[0090]

[0091] 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 113 of the first noise reduction cavity, the depth L of the first noise reduction hole 113 and the number x of the first noise reduction holes 113 of the first noise reduction cavity, 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 1000.

[0092] In some embodiments, the number of the first noise reduction cavity and the first noise reduction hole 113 is multiple (for a schematic diagram of multiple first noise reduction holes 113, see Figure 2 ), each first noise reduction cavity corresponds to and is connected to at least one first noise reduction hole 113. This means that each first noise reduction cavity is connected to the heat exchange cavity 210 via one first noise reduction hole 113, or via multiple first noise reduction holes 113, so that sound waves can effectively enter the first noise reduction cavity, thereby achieving the purpose of noise reduction by utilizing the first noise reduction cavity.

[0093] It should be noted that the wavelength range of a single Helmholtz resonator is too narrow. Based on this, the present application sets up multiple first noise reduction cavities and multiple first noise reduction holes 113. The multiple first noise reduction cavities and multiple first noise reduction holes 113 can cooperate to form a combination of multiple Helmholtz resonators to absorb noise of specific frequencies and improve the noise reduction effect.

[0094] In some embodiments, combined Figure 1 and Figure 2As shown, the guide member 600 is disposed near the communication port 310 and has a guide surface 610. The guide surface 610 extends laterally from the communication port 310 to the heat exchanger 400, gradually extending away from the center of the communication port 310. The first noise reduction hole 113 is disposed on the guide surface 610. By arranging the guide surface 610 to extend laterally from the communication port 310 to the heat exchanger 400, gradually extending away from the center of the communication port 310, the guide surface 610 extends obliquely relative to the communication port 310. While the guide member 600 guides the airflow toward the heat exchanger 400, it also prevents the guide member 600 from obstructing the airflow. This ensures a certain amount of airflow, improves the airflow effect of the ducted air conditioner 1000, and thereby enhances the performance of the ducted air conditioner 1000.

[0095] In some embodiments, combined Figure 1 、 Figure 3 and Figure 4 As shown, the fan assembly 100 includes a first volute 112, a first impeller disposed within the first volute 112, a second volute 114, and a second impeller 115 disposed within the second volute 114. The first volute 112 and the second volute 114 are arranged longitudinally. The ducted air conditioner 1000 can be provided with multiple impellers (the first impeller and the second impeller 115). The combination of the multiple impellers can effectively enhance the air supply efficiency of the ducted air conditioner 1000 and improve the operating performance of the ducted air conditioner 1000 to a certain extent.

[0096] In a specific example, a first wind wheel is rotatably disposed in the first volute 112 to drive the airflow in the first volute 112, and a second wind wheel 115 is rotatably disposed in the second volute 114 to drive the airflow in the second volute 114. In this way, the wind wheel can be used to guide the air in the fan chamber 220 to the heat exchange chamber 210, thereby facilitating the circulation of air, thereby facilitating the delivery of air of a specific temperature into the room, achieving the purpose of regulating the indoor temperature, and ensuring the working performance of the fan assembly 100 to a certain extent.

[0097] Alternatively, as Figure 1As shown, there are multiple communicating ports 310, and the multiple communicating ports 310 include a first communicating port 311 and a second communicating port 312 arranged in the longitudinal direction. The first communicating port 311 connects the outlet 1111 of the air duct 111 defined by the first volute 112 and the heat exchange chamber 210, and the second communicating port 312 connects the outlet 1111 of the air duct 111 defined by the second volute 114 and the heat exchange chamber 210. At least one flow guide 600 is a first flow guide 620, and the first flow guide 620 is located between the first communicating port 311 and the second communicating port 312. In order to realize the use of the first guide member 620 to guide the air flowing through the first connecting port 311 and the second connecting port 312 at the same time, while allowing the airflow at the first connecting port 311 and the second connecting port 312 to flow toward the heat exchanger 400, the number of the guide members 600 can be reduced, which is conducive to simplifying the structure of the duct air conditioner 1000, avoiding increasing the size of the duct air conditioner 1000, and making the duct air conditioner 1000 have the advantage of occupying a small space.

[0098] In some embodiments, combined Figure 1 and Figure 2 As shown, the first air guide 620 has two first air guide surfaces 621 disposed in opposite directions in the longitudinal direction. The two first air guide surfaces 621 extend gradually toward each other in the transverse direction in a direction close to the heat exchanger 400. Each first air guide surface 621 is provided with a first noise reduction hole 113. This allows the first air guide 620 to simultaneously reduce the noise of the airflow at the first communication port 311 and the second communication port 312, thereby reducing the noise generated by the fan assembly 100 during operation. This allows the fan assembly 100 to have the advantage of low operating noise, thereby improving the user experience.

[0099] In some embodiments, combined Figure 1 and Figure 2 As shown, the first flow guide 620 includes two flow guides 622 arranged in the longitudinal direction. Each flow guide 622 defines a plurality of first noise reduction cavities. The two flow guides 622 have first flow guide surfaces 621 on the sides facing away from each other. This allows the first flow guide 620 to simultaneously reduce noise at both the first communication port 311 and the second communication port 312.

[0100] In some embodiments, combined Figure 1 and Figure 2As shown, the length direction of each flow guide 622 is tilted relative to the horizontal and vertical directions. One end of each flow guide 622 is connected to the partition 300, and the other end is connected to the partition 300, so that the two flow guides 622 are arranged at a predetermined angle. This ensures that the first flow guide surfaces 621 on both flow guides 622 extend laterally from the connecting opening 310 to the heat exchanger 400, gradually extending away from the center of the connecting opening 310. This ensures that the flow guide 600 guides the airflow toward the heat exchanger 400 while preventing the flow guide 600 from obstructing the airflow. This ensures a certain amount of airflow, which helps improve the airflow efficiency and performance of the ducted air conditioner 1000.

[0101] In some embodiments, combined Figure 1 and Figure 2 As shown, each flow guide 622 includes a fixed shell 6221, a cover plate 6222, and a separating rib (not shown in the figure). The fixed shell 6221 is fixed to the separator 300, and one side of the fixed shell 6221 has an opening, the cover plate 6222 closes the opening, and a plurality of first noise reduction holes 113 are provided in the cover plate 6222. The separating rib is provided between the fixed shell 6221 and the cover plate 6222 to form a plurality of first noise reduction cavities between the fixed shell 6221 and the cover plate 6222. In other words, the first noise reduction cavity of the present application is formed by the cooperation of the fixed shell 6221, the cover plate 6222, and the separating rib, which reduces the difficulty of forming the first noise reduction cavity.

[0102] In some embodiments, the fixed shell 6221 and the cover plate 6222 are detachably connected. This can reduce the difficulty of fitting the fixed shell 6221 and the cover plate 6222, improve assembly efficiency, and facilitate repair and replacement of the fixed shell 6221 and the cover plate 6222. Furthermore, the fixed shell 6221 and the cover plate 6222 can be formed into two independent parts. This allows them to be processed and formed separately during production, reducing the difficulty of forming the fixed shell 6221 and the cover plate 6222. This helps ensure the quality of the fixed shell 6221 and the cover plate 6222, and improves the performance of the first noise reduction structure 500.

[0103] In some embodiments, one of the fixed shell 6221 and the cover plate 6222 is integrally formed with the partition rib, and the other is abutted against the partition rib. This means that when the fixed shell 6221 and the partition rib are integrally formed, the cover plate 6222 abuts against the partition rib; or, when the cover plate 6222 and the partition rib are integrally formed, the fixed shell 6221 abuts against the partition rib. This reduces the difficulty of forming the partition rib and allows the opposite ends of the partition rib to abut against the fixed shell 6221 and the cover plate 6222, respectively. This ensures the sealing of each first noise reduction cavity after assembly, thereby maintaining the noise reduction effect of the first noise reduction cavity.

[0104] In some embodiments, combined Figure 1 、 Figure 3 and Figure 5 As shown, each of the first volute 112 and the second volute 114 includes a first shell 116 and a second shell 117. The first shell 116 and the second shell 117 are arranged vertically opposite each other and define an air duct 111 therebetween. The first shell 116 has a volute tongue 118 near the partition 300, and the volute tongue 118 is mechanically connected to the partition 300. The second shell 117 is integrally formed with the partition 300. By configuring each of the first volute 112 and the second volute 114 to include the first shell 116 and the second shell 117, and utilizing the first shell 116 and the second shell 117 to cooperate to define the air duct 111, the difficulty of forming the first volute 112 and the second volute 114 and the air duct 111 can be reduced.

[0105] By mechanically connecting the volute tongue 118 to the partition 300, the mechanical connection between the first shell 116 and the partition 300 can be achieved, thereby reducing the difficulty of fixing the first shell 116; by integrally forming the second shell 117 and the partition 300, the difficulty of fixing the second shell 117 can be reduced, thereby reducing the difficulty of fixing the first volute 112 and the second volute 114, and improving the positional stability of the first volute 112 and the second volute 114, thereby ensuring the performance of the first volute 112 and the second volute 114 to a certain extent.

[0106] The mechanical connection between the volute tongue 118 and the separator 300 may be a bolt connection or a clamping connection.

[0107] In some embodiments, combined Figure 6 、 Figure 7 and Figure 8 As shown, the fan assembly 100 further includes a third volute 119 and a third impeller disposed within the third volute 119. The second volute 114 is longitudinally located between the first volute 112 and the third volute 119. By further increasing the number of impellers provided, the combination of multiple impellers can effectively enhance the air supply effect of the ducted air conditioner 1000 and improve the operating performance of the ducted air conditioner 1000 to a certain extent.

[0108] Alternatively, as Figure 8As shown, at least one communication port 310 is a third communication port 313, which connects the outlet 1111 of the air duct 111 defined by the third volute 119 and the heat exchange chamber 210. At least one flow guide 600 is a second flow guide, which is located between the second communication port 312 and the third communication port 313. This allows the second flow guide to simultaneously guide air flowing through the second communication port 312 and the third communication port 313. This allows the airflow at the second communication port 312 and the third communication port 313 to flow toward the heat exchanger 400, while further reducing the number of flow guides 600. This simplifies the structure of the duct air conditioner 1000, avoids increasing the size of the duct air conditioner 1000, and ensures that the duct air conditioner 1000 has a small footprint.

[0109] The structure of the second flow guide is the same as that of the first flow guide 620 .

[0110] In some embodiments, the second flow guide has two second flow guide surfaces disposed in opposite directions in the longitudinal direction. The two second flow guide surfaces extend laterally in a direction approaching the heat exchanger 400 and gradually approach each other. Each second flow guide surface is provided with a first noise reduction hole 113. This allows the second flow guide to simultaneously reduce the noise of the airflow at the second communication port 312 and the third communication port 313, thereby reducing the noise generated by the fan assembly 100 during operation. This allows the fan assembly 100 to have the advantage of low operating noise, thereby improving the user experience.

[0111] In some embodiments, combined Figure 1 and Figure 6 As shown, the first wind wheel, the second wind wheel 115, and the third wind wheel are coaxially arranged. The fan assembly 100 also includes a motor 700. The first wind wheel is connected to the first output shaft of the motor 700 via a first connecting shaft, and the second wind wheel 115 is connected to the second output shaft of the motor 700 via a second connecting shaft. The second connecting shaft is also connected to the third wind wheel. This allows the motor 700 to simultaneously drive the first wind wheel, the second wind wheel 115, and the third wind wheel to rotate, ensuring the performance of the first wind wheel, the second wind wheel 115, and the third wind wheel. The number of motors 700 provided is simplified, reducing the cost of the ducted air conditioner 1000 and avoiding an increase in the size of the ducted air conditioner 1000, resulting in the ducted air conditioner 1000 having the advantage of occupying a small space.

[0112] In some embodiments, combined Figure 1 、 Figure 3 and Figure 6As shown, each of the first volute 112, the second volute 114, and the third volute 119 includes a first shell 116 and a second shell 117. The first shell 116 and the second shell 117 are arranged vertically opposite each other and define an air duct 111 therebetween. The first shell 116 has a volute tongue 118 near the partition 300, and the volute tongue 118 is mechanically connected to the partition 300. The second shell 117 is integrally formed with the partition 300. While reducing the difficulty of molding the first volute 112, the second volute 114, the third volute 119, and the air duct 111, it also reduces the difficulty of fixing the first volute 112, the second volute 114, and the third volute 119.

[0113] In some embodiments, combined Figure 1 and Figure 2 As shown, the air guide 600 has a relief portion 630, which is used to avoid the heating element in the heat exchanger 400 and / or the heat exchange chamber 210. Here, the relief portion 630 is used to avoid the heat exchanger 400; or, the relief portion 630 is used to avoid the heating element in the heat exchange chamber 210; or, the relief portion 630 is used to avoid the heating element in both the heat exchanger 400 and the heat exchange chamber 210. This, to a certain extent, prevents the air guide 600 from interfering with the heating element in the heat exchanger 400 and / or the heat exchange chamber 210 during installation, thereby reducing the difficulty of assembling the air guide 600. At the same time, it also prevents the size of the duct air conditioner 1000 from increasing due to the provision of the air guide 600, thus giving the duct air conditioner 1000 the advantage of occupying a small space.

[0114] In some embodiments, combined Figure 1 and Figure 2 As shown, the avoidance portion 630 has a first avoidance portion 631 and a second avoidance portion 632. The first avoidance portion 631 is used to avoid the heating element in the heat exchange chamber 210, and the second avoidance portion 632 is used to avoid the heat exchanger 400, so that the avoidance portion 630 can effectively avoid the heat exchanger 400 and the heating element in the heat exchange chamber 210, and to a certain extent avoid the interference of the guide member 600 with the heat exchanger 400 and the heating element in the heat exchange chamber 210 during installation.

[0115] In some embodiments, the divider 300 is provided with a second noise reduction structure, which includes a second noise reduction cavity and a second noise reduction hole. The second noise reduction hole connects the second noise reduction cavity and the communication port 310. Thus, when air flows through the communication port 310, sound waves in the airflow can enter the second noise reduction cavity through the second noise reduction hole. This facilitates the use of the second noise reduction hole and the second noise reduction cavity to absorb noise of a specific frequency, thereby achieving the purpose of noise reduction.

[0116] The principle by which the sound waves can resonate in the second noise reduction cavity is the same as the principle by which the sound waves can resonate in the first noise reduction cavity, and will not be elaborated here.

[0117] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0118] Other components of the duct air conditioner 1000 according to the embodiment of the present invention, such as the specific structure and working principle of the heat exchanger 400, are known to ordinary technicians in this field and will not be described in detail here.

[0119] Throughout this specification, references to terms such as "embodiment" and "example" indicate 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, schematic representations of these terms do 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.

[0120] 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: shell; a partition, the partition being provided in the housing to separate the inner cavity of the housing into a fan cavity and a heat exchange cavity arranged in a transverse direction, the partition defining a communication port; a fan assembly, the fan assembly being disposed in the fan cavity and defining an air duct, the inlet of the air duct being in communication with the fan cavity, and the outlet of the air duct being in communication with the heat exchange cavity via the communication port; a heat exchanger, the heat exchanger being disposed in the heat exchange cavity; At least one flow guide is provided on a side of the partition facing the heat exchange cavity and is used to guide airflow toward the heat exchanger, and the flow guide has a first noise reduction structure.

2. The duct type air conditioner according to claim 1, characterized in that: The first noise reduction structure includes 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.

3. The duct type air conditioner according to claim 2, characterized in that: 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.

4. The duct type air conditioner according to claim 2, characterized in that: The guide member is arranged near the communication port and has a guide surface. The guide surface extends from the communication port to the heat exchanger in the transverse direction and gradually moves away from the center of the communication port. The first noise reduction hole is arranged on the guide surface.

5. The duct type air conditioner according to claim 2, characterized in that: The fan assembly includes a first volute, a first wind wheel arranged in the first volute, a second volute and a second wind wheel arranged in the second volute, and the first volute and the second volute are arranged in the longitudinal direction; Wherein, the number of the connecting ports is multiple, and includes a first connecting port and a second connecting port arranged in the longitudinal direction, the first connecting port connects the outlet of the air duct defined by the first volute and the heat exchange chamber, the second connecting port connects the outlet of the air duct defined by the second volute and the heat exchange chamber, at least one of the guide members is a first guide member, and the first guide member is located between the first connecting port and the second connecting port.

6. The duct type air conditioner according to claim 5, characterized in that: The first flow guide member has two first flow guide surfaces arranged opposite to each other in the longitudinal direction. The two first flow guide surfaces extend gradually toward each other in the transverse direction along the direction close to the heat exchanger, and each first flow guide surface is provided with the first noise reduction hole.

7. The duct type air conditioner according to claim 6, characterized in that: The first flow guide member includes two flow guide bodies, and the two flow guide bodies are arranged in the longitudinal direction; Each of the guide bodies defines a plurality of the first noise reduction cavities, and the sides of the two guide bodies facing away from each other have the first guide surfaces.

8. The duct type air conditioner according to claim 7, characterized in that: The length direction of each guide body is inclined relative to the transverse direction and the longitudinal direction. One end of the two guide bodies in the length direction is connected to the partition and the other end in the length direction is connected, so that the two guide bodies are arranged at a preset angle.

9. The duct type air conditioner according to claim 7, characterized in that: Each of the guide bodies comprises: a fixed shell, the fixed shell being fixed to the partition and having an opening on one side thereof; a cover plate, the cover plate closing the opening, and the plurality of first noise reduction holes being provided on the cover plate; A separation rib is provided between the fixing shell and the cover plate to form a plurality of the first noise reduction cavities between the fixing shell and the cover plate.

10. The duct type air conditioner according to claim 5, characterized in that: Each of the first volute and the second volute includes a first shell and a second shell, the first shell and the second shell are arranged opposite to each other in the vertical direction and define the air duct therebetween, the first shell has a volute tongue near the partition and the volute tongue is mechanically connected to the partition, and the second shell is integrally formed with the partition.

11. The duct type air conditioner according to claim 5, characterized in that: The fan assembly further includes a third volute and a third wind wheel disposed in the third volute, and the second volute is located between the first volute and the third volute in the longitudinal direction; Among them, at least one of the connecting ports is a third connecting port, and the third connecting port connects the outlet of the air duct defined by the third volute and the heat exchange chamber; at least one of the flow guide members is a second flow guide member, and the second flow guide member is located between the second connecting port and the third connecting port.

12. The duct type air conditioner according to claim 11, characterized in that: The second flow guide member has two second flow guide surfaces arranged opposite to each other in the longitudinal direction. The two second flow guide surfaces extend gradually toward each other in the transverse direction along the direction close to the heat exchanger, and each second flow guide surface is provided with the first noise reduction hole.

13. The duct type air conditioner according to claim 11, characterized in that: The structure of the second flow guide is the same as that of the first flow guide.

14. The duct type air conditioner according to claim 11, characterized in that: The first wind wheel, the second wind wheel and the third wind wheel are coaxially arranged. The wind turbine assembly also includes a motor. The first wind wheel is connected to the first output shaft of the motor through a first connecting shaft, the second wind wheel is connected to the second output shaft of the motor through a second connecting shaft, and the second connecting shaft is also connected to the third wind wheel.

15. The duct type air conditioner according to claim 11, characterized in that: Each of the first volute, the second volute and the third volute includes a first shell and a second shell, the first shell and the second shell are arranged opposite to each other in the vertical direction and define the air duct therebetween, the first shell has a volute tongue near the partition and the volute tongue is mechanically connected to the partition, and the second shell is integrally formed with the partition.

16. The duct-type air conditioner according to any one of claims 1 to 15, characterized in that: The flow guide has an avoidance portion for avoiding the heat exchanger and / or the heating element in the heat exchange cavity.

17. The duct-type air conditioner according to any one of claims 1 to 15, characterized in that: The partition is provided with a second noise reduction structure, the second noise reduction structure includes a second noise reduction cavity and a second noise reduction hole, and the second noise reduction hole communicates with the second noise reduction cavity and the communication port.

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