Air pipe type air conditioner

Abstract

The utility model discloses an air pipe type air conditioner which comprises a shell, an air pipe, an air inlet pipe and an air outlet pipe. An air duct is defined by the air duct component; the wind wheel is used for driving airflow to enter the shell from the air inlet, flow through the air duct and be exhausted from the air outlet; the heat exchanger is located between the outlet of the air duct and the air outlet in the airflow direction; wherein the air duct component comprises a base plate and a volute, the base plate is fixed in the shell, at least part of an air duct is defined by the volute, the base plate is suitable for defining a noise reduction cavity, noise reduction holes are formed in the base plate, and the noise reduction cavity is communicated with the air duct through at least one noise reduction hole. According to the air duct type air conditioner, the noise reduction cavity communicated with the air duct is formed, sound waves in the air duct can enter the noise reduction cavity through the noise reduction holes, the sound waves resonate after entering the noise reduction cavity, sound energy is consumed through the resonance effect, and 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.

Description

Technical Field

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

[0002] Most central air-conditioning duct units 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 utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a ducted air conditioner that forms a noise reduction chamber connected to the air duct, allowing sound waves in the air duct to enter the noise reduction chamber through noise reduction holes. Upon entering the noise reduction chamber, the sound waves resonate, dissipating sound energy through the resonance effect, thereby achieving the purpose of sound absorption and noise reduction. This achieves noise reduction without increasing the size of the ducted air conditioner, thereby improving the user experience.

[0004] duct, and the like. The duct-type air conditioner according to the embodiment of the first aspect of the present invention comprises: a shell having an air inlet and an air outlet; a duct component, the duct component being arranged in the shell and defining the air outlet; a wind wheel, the wind wheel being rotatably arranged in the air outlet, for driving the air flow from the air inlet into the shell, flowing through the air outlet, and being discharged from the air outlet; a heat exchanger, the heat exchanger being arranged in the shell, and in the air flow direction, the heat exchanger being located between the outlet of the air outlet and the air outlet; wherein the air duct component comprises a chassis and a volute, the chassis being fixed in the shell, the volute being arranged on one side of the chassis and defining at least part of the air outlet, the chassis being suitable for defining a noise reduction cavity, and a noise reduction hole being provided on the chassis, the noise reduction cavity being connected to the air outlet through at least one of the noise reduction holes.

[0005] According to the duct-type air conditioner of the embodiment of the present invention, a noise reduction cavity connected to the air duct is formed, so that sound waves in the air duct can enter the noise reduction cavity through the noise reduction hole. After the sound waves enter the noise reduction cavity, resonance will occur, and the sound energy will be consumed through the resonance effect, thereby achieving the purpose of sound absorption and noise reduction, so as to achieve noise reduction without increasing the size of the duct-type air conditioner, thereby improving the user experience.

[0006] In addition, the duct-type air conditioner according to the above embodiment of the utility model may also have the following additional technical features:

[0007] According to some embodiments of the present invention, the chassis defines the outlet, and at least part of the noise reduction holes are provided on the wall of the chassis defining the outlet.

[0008] According to some optional embodiments of the present invention, the volute includes a volute tongue and a first air duct wall, and the volute tongue and the first air duct wall are arranged in a first direction with the chassis; wherein, the volute tongue and the first air duct wall are located on the peripheral side of the outlet and are arranged relative to each other in a second direction, the second direction is arranged at an angle to the first direction, and the noise reduction hole is arranged on the wall of the chassis close to the first air duct wall.

[0009] According to some specific embodiments of the present invention, at least one of the noise reduction chambers is located on the side of the chassis away from the outlet; or, a portion of at least one of the noise reduction chambers is located on the side of the chassis away from the outlet and another portion is located on the side of the first air duct wall away from the air duct.

[0010] According to some specific embodiments of the present invention, there are multiple noise reduction cavities, at least a portion of the noise reduction cavities are arranged in a third direction, and the third direction is set at an angle to the first direction and the second direction, and at least one noise reduction cavity extends along the first direction.

[0011] According to some specific embodiments of the present invention, the volute includes a first shell and a second shell, the first shell and the second shell are formed separately and the air duct is defined between the two, the first air duct wall is located on the first shell and is integrally formed with the chassis, and the volute tongue is located on the second shell and is mechanically connected to the chassis.

[0012] According to some embodiments of the present invention, the chassis includes a first wall body, the outer shell includes a first shell wall, and the first shell wall and the first wall body cooperate with each other to define the noise reduction cavity therebetween.

[0013] According to some optional embodiments of the present invention, the first wall body has a dividing rib on a side facing the first shell wall, and the dividing rib abuts against the first shell wall, so that a plurality of the noise reduction cavities are defined between the first shell wall and the first wall body.

[0014] According to some specific embodiments of the present invention, there are multiple dividing ribs, and the multiple dividing ribs are arranged at intervals; or, there are multiple dividing ribs, and they include at least one first convex rib and at least one second convex rib, and the first convex rib and the second convex rib are arranged at an angle.

[0015] According to some specific embodiments of the present invention, the housing includes a top plate, and the top plate forms the first housing wall.

[0016] In some embodiments, the top plate has a structural reinforcement portion, the structural reinforcement portion includes a reinforcement protrusion and / or a reinforcement recess, and the separation rib is adapted to the shape of at least a portion of the structural reinforcement portion.

[0017] In some embodiments, a limit member is provided on the side of the first wall body facing the heat exchanger, and the limit member extends along the length direction of the chassis and has a gap between the limit member and the top plate for accommodating a sound absorbing member; wherein the side of the limit member facing away from the top plate is flush with the side of the first wall body facing away from the top plate; and / or, the limit member includes a plurality of limit portions, and the plurality of limit portions are arranged at intervals in the length direction of the chassis.

[0018] According to some embodiments of the present invention, the chassis divides the inner cavity of the outer shell into a first chamber and a second chamber, the first chamber is connected to the air inlet, the second chamber is connected between the outlet and the air outlet, the volute is arranged in the first chamber, and the heat exchanger is arranged in the second chamber.

[0019] According to some optional embodiments of the present invention, there are multiple volutes, and the multiple volutes are arranged on the same side of the chassis and spaced apart in the length direction of the chassis, and the wind wheel is provided in each volute.

[0020] 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

[0021] 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:

[0022] Figure 1 This is a cross-sectional view of the structure of the duct type air conditioner according to an embodiment of the present utility model;

[0023] Figure 2 It is a schematic diagram of a partial structure of a duct-type air conditioner according to an embodiment of the present utility model in one direction;

[0024] Figure 3 is a schematic diagram of a partial structure of a duct-type air conditioner according to an embodiment of the present utility model in another direction;

[0025] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 This is a schematic diagram of the principle of the Helmholtz resonator.

[0027] Reference numerals: 1. duct air conditioner;

[0028] 10. Housing; 11. First chamber; 12. Second chamber;

[0029] 30. Heat exchanger; 41. Air duct component; 411. Air duct; 412. Inlet; 413. Outlet; 42. Volute; 421. Volute tongue; 422. First air duct wall; 423. First shell; 424. Second shell; 43. Chassis; 4301. First part; 4302. Second part; 431. First wall; 432. Separating rib; 4321. First convex rib; 4322. Second convex rib; 433. Limiting member; 4331. Limiting portion; 441. Noise reduction chamber; 442. Noise reduction hole; 45. Wind wheel. DETAILED DESCRIPTION

[0030] 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.

[0031] The following describes a duct-type air conditioner according to an embodiment of the present invention with reference to the accompanying drawings.

[0032] like Figures 1-4 As shown, the duct-type air conditioner 1 according to an embodiment of the present invention includes a housing 10 , an air duct component 41 , a wind wheel 45 and a heat exchanger 30 .

[0033] The housing 10 has an air inlet and an air outlet. The air duct component 41 is arranged in the housing 10 and defines the air outlet duct 411. The wind wheel 45 is rotatably arranged in the air duct 411 to drive the air flow from the air inlet into the housing 10, flow through the air duct 411, and be discharged from the air outlet. The heat exchanger 30 is arranged in the housing 10, and in the direction of the air flow, the heat exchanger 30 is located between the outlet 413 of the air duct 411 and the air outlet.

[0034] Specifically, driven by the wind wheel 45, the air outside the duct air conditioner 1 enters the outer shell 10 from the air inlet, flows along the air duct 411 to the heat exchanger 30, and flows from the air outlet to the room after heat exchange in the heat exchanger 30 to cool or heat the room.

[0035] Among them, the air duct component 41 includes a chassis 43 and a volute 42. The chassis 43 is fixed in the outer shell 10. The volute 42 is arranged on one side of the chassis 43 and defines at least part of the air duct 411. The chassis 43 is suitable for defining a noise reduction cavity 441, and a noise reduction hole 442 is provided on the chassis 43. The noise reduction cavity 441 is connected to the air duct 411 through at least one noise reduction hole 442.

[0036] It should be explained here that the chassis 43 is suitable for defining the noise reduction cavity 441. The chassis 43 itself may define the noise reduction cavity 441, or the chassis 43 and other structural parts may jointly define the noise reduction cavity 441. No excessive restrictions are imposed here.

[0037] Since the air duct 411 is connected to the noise reduction cavity 441 through at least one noise reduction hole 442, the sound waves in the air duct 411 can enter the noise reduction cavity 441 through the noise reduction hole 442. The sound waves will resonate in the noise reduction cavity 441 to consume the energy of the sound waves, thereby playing a noise reduction role.

[0038] Specifically, when the ducted air conditioner 1 is in operation, the impeller 45 draws air from outside the ducted air conditioner 1 into the housing 10, which is then pressurized by the impeller 45 and sent to the room through the air outlet to form a cycle. During this process, the high-speed rotation of the impeller 45 causes the airflow to flow through the impeller 45. Due to the viscous friction of air molecules, the airflow with a certain speed interacts with the relatively static airflow behind the impeller 45, forming an airflow with vortices in the downstream area of ​​the impeller 45. These vortices constantly change and fall 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 pressure jumps propagate outward through the surrounding medium and act on the impeller 45. When the pressure pulsation in the turbulent flow contains audible frequency components and the intensity is large enough, noise is radiated, forming turbulent noise. As the rotor 45 rotates, it sweeps through the air in the vicinity. Due to the interaction of forces, the gas medium is affected by the rotor 45, generating a periodic pressure field and emitting noise. As the air flows over the rotor 45, the boundary layers of the suction and pressure surfaces merge at its trailing edge to form a wake region. Within this wake region, the pressure and velocity of the airflow are significantly lower than those in the mainstream region. As the rotor 45 rotates, the airflow in the area of ​​the rotor 45 outlet 413 becomes highly non-uniform. This non-uniform potential flow field periodically acts on surrounding obstacles, generating noise similar to the sound produced by stroking a string.

[0039] The flow area of ​​the noise reduction hole 442 is smaller than the flow area of ​​the noise reduction cavity 441. This allows the noise reduction hole 442 and the noise reduction cavity 441 to cooperate to form a Helmholtz resonator. When air flows from the noise reduction hole 442 into the noise reduction cavity 441, the flow area of ​​the noise reduction cavity 441 is larger than the flow area of ​​the noise reduction hole 442, so that the flow velocity of the air in the noise reduction cavity 441 is much smaller than the flow velocity of the local airflow in the center of the noise reduction cavity 441, thereby forming a more intense shear flow in the noise reduction cavity 441, accompanied by unstable disturbance waves. At the same time, if the air column in the noise reduction hole 442 is affected The disturbance moves into the noise reduction chamber 441, and the gas in the noise reduction chamber 441 is compressed, and the pressure increases. At this time, the air in the noise reduction hole 442 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 noise reduction chamber 441, and then causes the air column in the noise reduction hole 442 to stop moving outward and move 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 to achieve the purpose of noise reduction.

[0040] It should be noted that the resonant frequency of a Helmholtz resonator depends on its geometry and volume. Therefore, the flow area of ​​the noise reduction holes 442 and / or the flow area of ​​the noise reduction chamber 441 can be adjusted based on the frequency of the noise to be eliminated. In other words, the combination of the noise reduction holes 442 and the noise reduction chamber 441 can absorb noise of a specific frequency, achieving the purpose of noise reduction, reducing the noise generated by the rotation of the impeller 45 to a certain extent, and improving the user experience.

[0041] According to the duct-type air conditioner 1 of the embodiment of the present invention, by forming a noise reduction chamber 441 connected to the air duct 411, the sound waves in the air duct 411 can enter the noise reduction chamber 441 through the noise reduction hole 442. After the sound waves enter the noise reduction chamber 441, 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 1, thereby improving the user experience.

[0042] The following describes a duct-type air conditioner 1 according to a specific embodiment of the present invention with reference to the accompanying drawings.

[0043] In some specific embodiments of the present invention, Figures 1-4 As shown, the duct-type air conditioner 1 includes a housing 10 , an air duct component 41 , a wind wheel 45 and a heat exchanger 30 .

[0044] In some embodiments of the present invention, Figure 2As shown, the chassis 43 defines an outlet 413, and at least part of the noise reduction holes 442 are provided on the wall of the chassis 43 defining the outlet 413. When the sound waves in the air duct 411 flow through the outlet 413, the sound waves can enter the noise reduction cavity 441 from the noise reduction holes 442, so that the sound waves can resonate in the noise reduction cavity 441, thereby consuming the energy of the sound waves and playing a role in sound absorption and noise reduction.

[0045] In some embodiments, by providing noise reduction holes 442 and noise reduction chambers 441 on the chassis 43 , the noise can be reduced by about 2 dB without affecting the original structure of the duct-type air conditioner 1 .

[0046] In some optional embodiments of the present invention, such as Figure 1 As shown, the volute 42 includes a volute tongue 421 and a first air duct wall 422, and the volute tongue 421 and the first air duct wall 422 are arranged in the first direction with the chassis 43, wherein the volute tongue 421 and the first air duct wall 422 are located on the peripheral side of the outlet 413 and are arranged relative to each other in the second direction, and the second direction is arranged at an angle to the first direction. The noise reduction hole 442 is provided on the wall of the chassis 43 close to the first air duct wall 422, and the first air duct wall 422 plays a guiding role for the air at the outlet 413 of the air duct 411. The air and sound waves can flow along the first air duct wall 422 to the chassis 43, and the sound waves can enter the noise reduction cavity 441 through the noise reduction hole 442 on the chassis 43.

[0047] In some embodiments, as Figure 1 、 Figure 2 As shown, the first direction extends along the front-to-back direction, and the second direction extends along the up-down direction. The chassis 43 is located on the front side of the volute 42, the volute tongue 421 and the first air duct wall 422 are arranged relatively to each other along the up-down direction, and the noise reduction hole 442 is provided on the wall of the chassis 43 close to the first air duct wall 422. The area where the noise reduction hole 442 is provided on the chassis 43 is located on the front side of the first air duct wall 422. When the wind wheel 45 drives the air in the air duct 411 to flow forward from the outlet 413 to the heat exchanger 30, the sound waves flowing through the chassis 43 can enter the noise reduction cavity 441 through the noise reduction hole 442. The sound waves will resonate in the noise reduction cavity 441 to consume the energy of the sound waves, thereby playing a role in sound absorption and noise reduction.

[0048] In some specific embodiments of the present invention, at least one noise reduction cavity 441 is located on a side of the chassis 43 away from the outlet 413 , so that the chassis 43 itself defines the noise reduction cavity 441 , thereby utilizing the noise reduction cavity 441 to absorb and reduce noise.

[0049] In other specific embodiments of the present invention, Figure 1 、 Figure 3As shown, a portion of at least one noise reduction cavity 441 is located on the side of the chassis 43 away from the outlet 413 and another portion is located on the side of the first air duct wall 422 away from the air duct 411, so that the noise reduction cavity 441 is jointly defined by the chassis 43 and the first air duct wall 422, and the noise reduction cavity 441 is utilized to absorb sound and reduce noise.

[0050] Among them, for noise reduction cavities 441 of different volumes, the noise reduction cavities 441 can achieve different sound absorption effects. For example, the noise reduction cavities 441 with a larger volume can absorb low-frequency sounds, and the noise reduction cavities 441 with a smaller volume can absorb high-frequency sounds.

[0051] Specifically, due to the size limitation of the chassis 43 itself, the volume of the noise reduction chamber 441 independently defined by the chassis 43 is relatively small. In order to be able to reduce the noise of sounds within a relatively wide frequency range, the chassis 43 and the first air duct wall 422 jointly define the noise reduction chamber 441, so that a larger volume is reserved for the noise reduction chamber 441 so that the noise reduction chamber 441 can absorb low-frequency sounds, and thus can effectively reduce noise within a wider frequency range, so as to achieve a better noise reduction effect at the outlet 413.

[0052] In some specific embodiments of the present invention, Figure 3 、 Figure 4 As shown, there are multiple noise reduction cavities 441, at least a part of the noise reduction cavities 441 are arranged in a third direction, and the third direction is set at an angle to the first direction and the second direction. At least one noise reduction cavity 441 extends along the first direction to form multiple noise reduction cavities 441 in a limited space, and then utilizes multiple noise reduction cavities 441 to consume energy in sound waves and play a noise reduction role.

[0053] In some embodiments, the first direction extends along the front-to-back direction, the second direction extends along the up-down direction, and the third direction extends along the left-to-right direction. At least a portion of the noise reduction chamber 441 is arranged in the left-to-right direction, and at least one noise reduction chamber 441 extends along the front-to-back direction (it should be understood here that the above-mentioned direction limitation is only for the convenience of describing the accompanying drawings and will not limit the actual setting position and direction of the duct-type air conditioner 1), so that multiple noise reduction chambers 441 can be formed in a limited space. By making the volumes of the multiple noise reduction chambers 441 different, the noise can be effectively reduced in a wider frequency range, so as to achieve a better noise reduction effect at the outlet 413.

[0054] In some optional implementations of the present invention, such as Figure 3 As shown, the volute 42 includes a first shell 423 and a second shell 424. The first shell 423 and the second shell 424 are formed separately and define an air duct 411 therebetween to facilitate the installation of the wind wheel 45 into the air duct 411, thereby reducing the difficulty of installation.

[0055] The first air duct wall 422 is located on the first shell 423 and is integrally formed with the chassis 43, which makes it easy to reduce the number of parts and components, thereby reducing the difficulty of assembly. The volute tongue 421 is located on the second shell 424 and is mechanically connected to the chassis 43 to connect the first shell 423 and the second shell 424, thereby defining the air duct 411.

[0056] In some embodiments of the present invention, Figure 1 、 Figure 3 As shown, the chassis 43 includes a first wall 431 , and the housing 10 includes a first shell wall. The first shell wall and the first wall 431 cooperate with each other to define a noise reduction cavity 441 therebetween.

[0057] In some embodiments, the first wall 431 defines a noise reduction cavity 441 having an open opening, and the first shell wall is used to close the open opening, thereby closing the noise reduction cavity 441, so that the sound waves in the air duct 411 can enter the noise reduction cavity 441 through the noise reduction hole 442, so that the sound waves can resonate in the noise reduction cavity 441, thereby consuming the energy in the sound waves and playing a noise reduction role.

[0058] In some optional embodiments of the present invention, such as Figure 4 As shown, the first wall body 431 has a dividing rib 432 on the side facing the first shell wall, and the dividing rib 432 is against the first shell wall to define a plurality of noise reduction cavities 441 between the first shell wall and the first wall body 431, so that sound waves can enter the plurality of noise reduction cavities 441 respectively, so that the sound waves can resonate in the plurality of noise reduction cavities 441, and then the plurality of noise reduction cavities 441 are used to achieve a noise reduction effect.

[0059] In some embodiments, some noise reduction cavities 441 have the same volume, and some noise reduction cavities 441 have different volumes, wherein the larger noise reduction cavities 441 can absorb low-frequency sounds, and the smaller noise reduction cavities 441 can absorb high-frequency sounds, so that multiple noise reduction cavities 441 can effectively reduce noise within a wider frequency range to achieve better noise reduction effects.

[0060] In some embodiments, the partition rib 432 and the first wall 431 are integrally formed, so there is no need to set a connecting structure between the partition rib 432 and the first wall 431, which helps reduce the complexity of the structure and the difficulty of assembly.

[0061] In some specific embodiments of the present invention, Figure 4 As shown, there are multiple dividing ribs 432 , and the multiple dividing ribs 432 are arranged at intervals to define multiple noise reduction cavities 441 arranged at intervals, thereby utilizing the multiple noise reduction cavities 441 to achieve a better noise reduction effect.

[0062] In some specific embodiments of the present invention, Figure 4As shown, there are multiple separating ribs 432, and the separating ribs 432 include at least one first rib 4321 and at least one second rib 4322. The first rib 4321 and the second rib 4322 are arranged at an angle, so that the first rib 4321 and the second rib 4322 can be used to separate the space between the first shell 423 and the first wall 431 into multiple noise reduction cavities 441, and then the multiple noise reduction cavities 441 can be used to achieve a better noise reduction effect.

[0063] In some embodiments, the first rib 4321 extends along the first direction, and the second rib 4322 extends along the third direction. The separating rib 432 and the first wall 431, the first air duct wall 422 and the first shell wall can define a long strip of noise reduction cavity 441, or a "7"-shaped noise reduction cavity 441.

[0064] The plurality of noise reduction holes 442 are centrally disposed on the first wall 431 .

[0065] Each noise reduction cavity 441 is connected to the air duct 411 through at least one noise reduction hole 442 , and some noise reduction cavities 441 are connected to the air duct 411 through multiple noise reduction holes 442 .

[0066] Specifically, due to the processing technology and the strength requirements of the first wall 431, the diameter of the noise reduction hole 442 should be between 0.5mm and 2.5mm. However, when designing the noise reduction hole 442 and the noise reduction cavity 441, the noise reduction cavity 441 in some position areas needs to be connected to the air duct 411 through a larger-sized noise reduction hole 442. Therefore, the larger-sized noise reduction hole 442 is divided into multiple small holes to meet the processing and strength requirements.

[0067] The same noise reduction cavity 441 is connected to the air duct 411 through a plurality of noise reduction holes 442 of the same diameter.

[0068] In some embodiments, such as Figure 5 As shown, the noise frequency to be eliminated S is the cross-sectional area of ​​the noise reduction hole 442, S=πD 2 / 4, V is the volume of the noise reduction cavity 441, L is the length of the noise reduction hole 442 (for details, see Figure 5 ).

[0069] Based on this, in a specific example, the noise reduction hole 442 can be used to absorb noise of different frequencies by adjusting S, V or L.

[0070] In some specific embodiments of the present invention, the housing 10 includes a top plate, which forms a first shell wall, so that the top plate is used to simultaneously seal the top of the housing 10 and the noise reduction cavity 441, thereby reducing the number of parts and further reducing production costs.

[0071] In some embodiments, the top plate has a structural reinforcement portion, which includes a reinforcement protrusion and / or a reinforcement recess, and the separation rib 432 is adapted to the shape of at least part of the structural reinforcement portion so that the top plate can match the separation rib 432, thereby enabling the top plate to fully enclose the noise reduction cavity 441, so that the noise reduction cavity 441 can play a noise reduction role.

[0072] In some embodiments, a limit member 433 is provided on the side of the first wall 431 toward the heat exchanger 30. The limit member 433 extends along the length direction of the chassis 43. There is a gap between the limit member 433 and the top plate. The gap between the limit member 433 and the top plate is used to accommodate a sound absorbing member so that the sound absorbing member can absorb energy in the sound waves, thereby achieving a noise reduction effect.

[0073] In some examples, the side of the limiter 433 facing away from the top plate is flush with the side of the first wall 431 facing away from the top plate, so as to limit the position of the sound absorbing member facing away from the top plate, thereby preventing the sound absorbing member from protruding from the side of the first wall 431 facing away from the top plate, and further preventing the sound absorbing member from affecting the flow of air.

[0074] In some examples, such as Figure 2 As shown, the limiting member 433 includes a plurality of limiting portions 4331, which are arranged at intervals in the length direction of the chassis 43, so that the position of the sound absorbing member is limited by the plurality of limiting portions 4331, so that the sound absorbing member is limited between the limiting portion 4331 and the top plate. Sound waves can flow to the sound absorbing member through the gap between two adjacent limiting portions 4331, so that the sound absorbing member can absorb the energy in the sound waves, thereby playing a noise reduction role.

[0075] In some embodiments of the present invention, Figure 1 、 Figure 2 As shown, the chassis 43 divides the inner cavity of the outer shell 10 into a first chamber 11 and a second chamber 12. The first chamber 11 is connected to the air inlet, and the second chamber 12 is connected between the outlet 413 and the air outlet. The volute 42 is arranged in the first chamber 11, and the heat exchanger 30 is arranged in the second chamber 12.

[0076] Specifically, driven by the wind wheel 45, the air outside the duct air conditioner 1 can enter the first chamber 11 through the air inlet, and the air in the first chamber 11 enters the air duct 411 from the inlet 412 of the air duct 411, and flows along the air duct 411 from the outlet 413 of the air duct 411 to the second chamber 12. After heat exchange in the heat exchanger 30 in the second chamber 12, the air flows from the air outlet to the room to cool or heat the room.

[0077] In some embodiments, as Figure 2As shown, the chassis 43 includes a first part 4301 and a second part 4302. The first part 4301 is arranged in the outer shell 10 and contacts the inner wall of the inner cavity of the outer shell 10 to divide the inner cavity of the outer shell 10 into a first chamber 11 and a second chamber 12 arranged in the second direction. The second part 4302 is arranged on one side of the first part 4301 in the first direction, and the second part 4302 is connected to the first air duct wall 422 at the end toward the volute 42.

[0078] The first portion 4301 has a communication port communicating with the air duct 411 to define an outlet 413 of the air duct 411 .

[0079] In some embodiments, the first part 4301, the second part 4302 and the first shell 413 are integrally formed, which reduces the number of parts and reduces the difficulty of assembly.

[0080] In some optional embodiments of the present invention, such as Figure 2 As shown, there are multiple volutes 42, which are arranged on the same side of the chassis 43 and spaced apart in the longitudinal direction of the chassis 43. Each volute 42 is provided with a fan 45, so that the multiple fan wheels 45 drive airflow from the air inlet into the housing 10, through the air duct 411 and out of the air outlet. This helps increase the airflow volume of the ducted air conditioner 1, thereby improving the cooling or heating effect of the ducted air conditioner 1.

[0081] In some specific embodiments of the present invention, a better noise reduction effect can be achieved by designing the cross-sectional area S of a single noise reduction hole 442, the depth L of the noise reduction hole 442, and the number x of noise reduction holes 442 connected to a single noise reduction cavity 441.

[0082] Specifically, it is said here that the multiple noise reduction cavities 441 form a complete sound absorption structure, and the acoustic impedance Z of the sound absorption structure satisfies:

[0083] where Z HH The acoustic impedance Z of the single noise reduction cavity 441 is represented by n, and the ordinal number of the noise reduction cavity 441 is represented by n. HH satisfy:

[0084]

[0085] The volume of the noise reduction cavity 441 is V, the cross-sectional area of ​​a single noise reduction hole 442 is S, and the surface area of ​​the inner side of the opening of the noise reduction cavity 441 is S. ca The depth of the noise reduction hole 442 is L, the number of noise reduction holes 442 connected to a single noise reduction cavity 441 is x, and the wall thickness of the volute 42 is l u .

[0086] 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 noise circular frequency, η is the aerodynamic viscosity, and A is the surface area of ​​the surface of the chassis 43 where the noise reduction cavity 441 is provided.

[0087] ρ ca 、c ca and k ca represent the density, sound speed and wave number of the air in the noise reduction chamber 441, 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.

[0088] The vertical incident sound absorption coefficient α of the sound absorbing structure can be calculated by the following formula:

[0089]

[0090] Among them, through data simulation, it can be concluded that for sounds of a certain frequency, by adjusting the cross-sectional area S of a single noise reduction hole 442, the depth L of the noise reduction hole 442, and the number x of noise reduction holes 442 connected to a single noise reduction cavity 441, a larger incident sound absorption coefficient α can be obtained, thereby making the noise reduction efficiency of the sound-absorbing structure higher.

[0091] In addition, the volume V of the noise reduction cavity 441, the cross-sectional area S of a single noise reduction hole 442, and the surface area S of the inner side of the opening of the noise reduction cavity 441 are calculated. ca The number x of noise reduction holes 442 connected to a single noise reduction cavity 441 can be set within the following range to effectively reduce noise of 400 Hz-2000 Hz.

[0092] 500mm 3 ≤V≤64000mm 3

[0093] 1.44mm 2 ≤S≤100mm 2

[0094] 100mm 2 ≤S ca ≤1600mm 2

[0095] 1≤x≤9

[0096] For the wall thickness of the volute 42, uThe values ​​of the depth L of the noise reduction hole 442, the volume V of the noise reduction cavity 441, and the cross-sectional area S of a single noise reduction hole 442 can follow the following formula to effectively reduce the noise of 400hz-2000hz.

[0097] l u ≤L≤V / S ca *0.5

[0098] Other structures and operations of the duct-type air conditioner 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0099] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0100] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0101] 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.

[0102] 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.

[0103] 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 having an air inlet and an air outlet; an air duct component, the air duct component being disposed in the housing and defining an air duct; a wind wheel rotatably disposed in the air duct, for driving air flow from the air inlet into the housing, through the air duct, and out of the air outlet; a heat exchanger, the heat exchanger being disposed in the housing and being located between the outlet of the air duct and the air outlet in the direction of air flow; Wherein, the air duct component includes a chassis and a volute, the chassis is fixed in the outer shell, the volute is arranged on one side of the chassis and defines at least part of the air duct, the chassis is suitable for defining a noise reduction cavity, and a noise reduction hole is provided on the chassis, and the noise reduction cavity is connected to the air duct through at least one of the noise reduction holes.

2. The duct type air conditioner according to claim 1, characterized in that: The bottom plate defines the outlet, and at least part of the noise reduction holes are arranged on the wall of the bottom plate defining the outlet.

3. The duct type air conditioner according to claim 2, characterized in that: The volute comprises a volute tongue and a first air duct wall, wherein the volute tongue and the first air duct wall are arranged in a first direction with the chassis; The volute tongue and the first air duct wall are located on the peripheral side of the outlet and are arranged relative to each other in a second direction, the second direction is arranged at an angle to the first direction, and the noise reduction hole is arranged on the wall of the chassis close to the first air duct wall.

4. The duct type air conditioner according to claim 3, characterized in that: At least one of the noise reduction chambers is located on a side of the chassis away from the outlet; or, a portion of at least one of the noise reduction chambers is located on a side of the chassis away from the outlet and another portion is located on a side of the first duct wall away from the duct.

5. The duct type air conditioner according to claim 3, characterized in that: There are multiple noise reduction cavities, at least some of which are arranged in a third direction, and the third direction is angled with both the first direction and the second direction, and at least one noise reduction cavity extends along the first direction.

6. The duct type air conditioner according to claim 3, characterized in that: The volute includes a first shell and a second shell, the first shell and the second shell are formed separately and define the air duct therebetween, the first air duct wall is located on the first shell and is integrally formed with the chassis, and the volute tongue is located on the second shell and is mechanically connected to the chassis.

7. The duct type air conditioner according to claim 1, characterized in that: The chassis includes a first wall body, and the shell includes a first shell wall. The first shell wall and the first wall body cooperate with each other to define the noise reduction cavity therebetween.

8. The duct type air conditioner according to claim 7, characterized in that: A side of the first wall body facing the first shell wall has a dividing rib, and the dividing rib abuts against the first shell wall, so that a plurality of the noise reduction cavities are defined between the first shell wall and the first wall body.

9. The duct type air conditioner according to claim 8, characterized in that: There are multiple dividing ribs, and the multiple dividing ribs are arranged at intervals; Alternatively, the number of the separating ribs is plural, and includes at least one first convex rib and at least one second convex rib, and the first convex rib and the second convex rib are arranged at an angle.

10. The duct type air conditioner according to claim 8, characterized in that: The housing includes a top plate forming the first housing wall.

11. The duct type air conditioner according to claim 10, characterized in that: The top plate has a structural reinforcement portion, which includes a reinforcement convex portion and / or a reinforcement concave portion, and the separation rib is adapted to the shape of at least a portion of the structural reinforcement portion.

12. The duct type air conditioner according to claim 10, characterized in that: A stopper is provided on the side of the first wall body facing the heat exchanger, the stopper extends along the length direction of the bottom plate and has a gap with the top plate for accommodating a sound absorbing member; Wherein, the side of the limiting member facing away from the top plate is flush with the side of the first wall body facing away from the top plate; and / or, the limiting member includes a plurality of limiting portions, which are arranged at intervals in the length direction of the chassis.

13. The duct-type air conditioner according to any one of claims 1 to 12, characterized in that: The chassis divides the inner cavity of the shell into a first chamber and a second chamber, the first chamber is connected to the air inlet, the second chamber is connected between the outlet and the air outlet, the volute is arranged in the first chamber, and the heat exchanger is arranged in the second chamber.

14. The duct type air conditioner according to claim 13, characterized in that: There are multiple volutes, which are arranged on the same side of the chassis and spaced apart in the length direction of the chassis. The wind wheel is arranged in each volute.

Images