Air inlet structure of duct type air conditioner and duct type air conditioner

Abstract

The utility model relates to the technical field of air conditioners, in particular to a ducted air conditioner air inlet structure and a ducted air conditioner. The air inlet structure of the ducted air conditioner comprises a ducted air conditioner shell provided with an air inlet facing downwards, and the air inlet is provided with an air inlet grille; the cross-flow fan is arranged in the air pipe machine shell and located above the air inlet; the sound insulation guide plate is arranged outside the air pipe machine shell and located below the air inlet, and the plate face of the sound insulation guide plate is obliquely arranged relative to the horizontal direction. The air duct machine is used for overcoming the defect of air inlet noise caused by the fact that a power source of the air duct machine is close to an air inlet in the prior art, reduces conduction of operation noise of the air duct machine to the indoor space, and improves user comfort and indoor environment quality.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to an air duct unit air inlet structure and an air duct unit. Background Art

[0002] In modern building air conditioning systems, ducted air conditioners are a type of concealed air conditioning equipment that is popular because they can hide the indoor unit in the ceiling, achieving an aesthetic and space-saving effect. However, in actual applications, the operating noise of ducted air conditioners has become an important factor affecting user comfort and environmental quality. This problem is particularly prominent when the power source of the ducted air conditioner (such as a motor, fan, etc.) is designed to be placed at the rear of the device, close to the air inlet.

[0003] Generally speaking, the working principle of the power source of a ducted air conditioner is to generate airflow through a motor-driven crossflow fan or other form of fan, so that the air enters the ducted air conditioner through the air inlet for heat exchange, and then is sent into the room through the air outlet. When the high-speed rotating fan inhales air, it is easy to cause airflow vortexes and turbulence with the edge of the air inlet or the grille, generating significant aerodynamic noise. Since the air inlet is usually set downward, the noise generated by the power source when it is working is more likely to spread downward, reach the ground directly and reflect into the indoor space, further exacerbating noise pollution. Utility Model Content

[0004] The utility model provides an air intake structure and an air intake duct machine, which are used to solve the defect in the prior art that the power source of the air intake duct machine is close to the air intake port, causing air intake noise, thereby reducing the transmission of the operating noise of the air intake duct machine into the room, and improving user comfort and indoor environmental quality.

[0005] The utility model provides an air inlet structure for a duct machine, comprising: an duct machine housing, provided with an air inlet facing downward, the air inlet being provided with an air inlet grille; a cross-flow fan, arranged in the duct machine housing and located above the air inlet; a sound insulation guide plate, arranged outside the duct machine housing and located below the air inlet, the plate surface of the sound insulation guide plate being arranged inclined relative to the horizontal direction.

[0006] According to a duct air conditioner air inlet structure provided by the utility model, a base is provided at the bottom of the duct air conditioner housing; the two bases are respectively located on both sides of the air inlet; the sound insulation guide plate is rotatably fitted between the two bases so as to be able to adjust the inclination angle of the sound insulation guide plate relative to the horizontal direction.

[0007] According to an air intake structure of an air duct machine provided by the utility model, at least one of the bases is provided with a motor, the sound insulation guide plate is provided with a driven shaft, and the motor is matched with the driven shaft of the sound insulation guide plate.

[0008] According to a duct machine air inlet structure provided by the utility model, the base includes a first mounting plate and a second mounting plate that are integrally formed; the first mounting plate is arranged at the bottom of the duct machine housing, and the motor is installed on the first mounting plate; the second mounting plate is perpendicular to the first mounting plate, and an avoidance hole is arranged on the second mounting plate, and the driven shaft passes through the avoidance hole and is transmission-connected to the motor.

[0009] According to an air intake structure of an air duct machine provided by the utility model, U-shaped plates perpendicular to the plate surface are respectively arranged at both ends of the length direction of the sound insulation guide plate; and the driven shaft is vertically arranged on the U-shaped plate.

[0010] According to an air inlet structure of an air duct machine provided by the utility model, a surface of the sound insulation guide plate on one side facing the air inlet is covered with a sound insulation cushion layer.

[0011] According to the air intake structure of a duct air conditioner provided by the utility model, the sound insulation cushion layer is detachably adhered to the sound insulation guide plate.

[0012] According to an air intake structure of a duct machine provided by the utility model, the air intake grille includes a straight portion and an arcuate portion; the straight portion is parallel to the horizontal direction; the arcuate portion is folded upward from one side of the straight portion close to the rear end of the duct machine to form an arc-shaped rear air inlet.

[0013] According to an air intake structure of a duct machine provided by the utility model, the air intake grille includes a grid structure formed by multiple rows of transverse grid plates and multiple columns of longitudinal grid plates; the grid structure is adapted to the shapes of the straight portion and the arc portion; the plate surfaces of the transverse grid plates and the longitudinal grid plates are both perpendicular to the horizontal direction.

[0014] According to a duct air inlet structure provided by the utility model, the sound insulation guide plate has a closed state and an open state; in the closed state, the sound insulation guide plate is parallel to the straight portion; in the open state, the angle between the sound insulation guide plate and the straight portion is greater than 0 degrees and less than 90 degrees.

[0015] The utility model also provides an air duct machine, comprising the air duct machine air inlet structure described in any one of the above embodiments.

[0016] The utility model provides an air intake structure for a duct machine and an air intake unit. The air intake structure for the duct machine changes the noise propagation path near the air inlet by tilting the surface of the sound insulation guide plate relative to the horizontal direction, thereby reducing the noise propagation directly downward, thereby reducing the amount of noise reaching the ground and reflected into the room. The air intake unit adopts the above-mentioned air intake structure for the duct machine, optimizes the air intake path, guides the air flow to enter smoothly, and enhances the sound insulation effect, thereby effectively reducing the transmission of noise generated during the operation of the duct machine into the room, thereby significantly improving the comfort of the user's living or working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of the air duct machine provided by the utility model;

[0019] Figure 2 yes Figure 1 A partial schematic diagram of the structure shown;

[0020] Figure 3 It is a cross-sectional structural diagram of the air inlet structure of the air duct machine provided by the utility model;

[0021] Figure 4 It is a schematic diagram of the exploded structure of the duct machine provided by the utility model;

[0022] Reference numerals:

[0023] 10. Duct machine housing; 11. Crossflow fan; 12. Base; 13. Motor; 14. First mounting plate; 15. Second mounting plate; 20. Air inlet grille; 21. Straight portion; 22. Arc portion; 30. Sound insulation guide plate; 31. Driven shaft; 32. U-shaped plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. It should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0026] Combine the following Figure 1-Figure 4 The specific implementation of the air intake structure of the air duct machine of the utility model is described.

[0027] The utility model provides an air intake structure for a duct machine, which aims to significantly reduce the impact of noise generated during the operation of the duct machine on the indoor environment by improving the configuration of the internal and external components of the duct machine. The air intake structure of the duct machine includes: a duct machine housing 10, which is provided with an air inlet facing downward, and the air inlet is provided with an air inlet grille 20; a cross-flow fan 11, which is arranged in the duct machine housing 10 and is located above the air inlet; a sound insulation guide plate 30, which is arranged outside the duct machine housing 10 and is located below the air inlet, and the plate surface of the sound insulation guide plate 30 is inclined relative to the horizontal direction. When the cross-flow fan 11 is running, the noise generated by it will first encounter the obstruction of the inclined sound insulation guide plate 30 during the downward transmission process, which changes the original straight-line transmission path and significantly reduces the amount of noise transmitted into the room, thereby improving the indoor noise environment when the duct machine is running and improving the user's comfort.

[0028] Specifically, the duct machine housing 10 serves as the basic frame of the duct machine and is provided with an air inlet facing downward, so as to facilitate the introduction of indoor air from below to participate in the heat exchange process. The crossflow fan 11 will generate a certain amount of mechanical noise when in operation, and this part of the noise will be transmitted downward during the air flow. The air inlet grille 20 at the air inlet can prevent foreign matter from entering the duct machine, and can also play a role in guiding and rectifying the airflow, which helps to reduce the noise generated by the turbulent airflow. The sound insulation guide plate 30 is arranged on the outside of the duct machine housing 10 and is adjacent to the bottom of the air inlet. The plate surface of the sound insulation guide plate 30 is inclined relative to the horizontal direction. The inclined plate surface can change the propagation path of the noise, so that part of the noise that was originally transmitted directly downward is directed to other directions, thereby avoiding the noise from directly reaching the ground and generating strong reflections, thereby reducing the accumulation of indoor noise. The material of the sound insulation guide plate 30 itself is preferably a sound-absorbing material, such as polyester fiber sound-absorbing board, mineral wool sound-absorbing board, wooden sound-absorbing board, perforated gypsum sound-absorbing board, etc., so as to have good sound absorption performance, be able to absorb and attenuate the noise energy passing through its surface, and further reduce the transmission intensity of the noise.

[0029] According to a duct machine air inlet structure provided by the utility model, a base 12 is provided at the bottom of the duct machine housing 10; two bases 12 are respectively located on both sides of the air inlet; and a sound insulation guide plate 30 is rotatably matched between the two bases 12 so as to be able to adjust the inclination angle of the sound insulation guide plate 30 relative to the horizontal direction. By providing the base 12 at the bottom of the duct machine housing 10 and making the sound insulation guide plate 30 rotatably matched therewith, convenient adjustment of the inclination angle of the sound insulation guide plate 30 is achieved. Not only does it simplify the installation process of the sound insulation guide plate 30, making it easy to retrofit and upgrade the existing duct machine, it also greatly enhances the adaptability of the duct machine air inlet structure to different use environments, ensuring that while effectively reducing noise, it does not affect the normal ventilation efficiency of the duct machine, thereby improving the overall user experience and equipment performance.

[0030] Specifically, the two bases 12 are located on both sides of the air inlet. The base 12 serves as a supporting and fixing structure, providing a solid foundation for the installation of the sound insulation guide plate 30. The sound insulation guide plate 30 and the bases 12 on both sides are rotated to achieve flexible adjustment of the inclination angle relative to the horizontal direction. Users can optimize the noise reduction effect by adjusting the inclination angle of the sound insulation guide plate 30 according to the needs of the actual use environment. Different inclination angles will affect the reflection path and sound absorption effect of the noise. Finding the best angle can not only block the propagation of noise into the room to the greatest extent, but also ensure sufficient air intake to maintain the normal operation of the duct air conditioner. This adjustability enables the air intake structure of the duct air conditioner to adapt to different building structures, room layouts and the personalized needs of users for noise sensitivity, significantly improving the applicability of the structure.

[0031] According to an air intake structure of a duct machine provided by the utility model, at least one base 12 is provided with a motor 13, and a sound insulation guide plate 30 is provided with a driven shaft 31, and the motor 13 is in transmission cooperation with the driven shaft 31 of the sound insulation guide plate 30. The sound insulation guide plate 30 driven by the motor 13 has the ability to automatically adjust the tilt angle. Specifically, the motor 13 is in transmission cooperation with the driven shaft 31 on the sound insulation guide plate 30, and by starting the motor 13, the tilt angle of the sound insulation guide plate 30 can be electrically adjusted without manual operation. According to a preset program, sensor feedback or user remote instructions, the motor 13 can accurately control the rotation of the driven shaft 31, thereby dynamically adjusting the angle of the sound insulation guide plate 30 to adapt to environmental changes (such as wind speed, changes in the position of the noise source, etc.) or changes in user needs, and always maintain the best noise reduction effect.

[0032] In a preferred embodiment, considering the balance, stability and long-term durability of the sound insulation guide plate 30, motors 13 are preferably provided on the two bases 12, and the dual motors 13 synchronously drive the two ends of the sound insulation guide plate 30. This dual motor design ensures that the sound insulation guide plate 30 is evenly stressed on both sides during rotation, avoiding problems such as asynchronous rotation and uneven stress caused by unilateral drive, and effectively preventing the guide plate itself from being distorted and deformed, thereby affecting its sound absorption performance and structural stability. The synchronous control of the dual motors 13 can also improve the accuracy and response speed of the adjustment process, further improving the performance of the air intake structure of the duct fan.

[0033] According to a duct machine air inlet structure provided by the utility model, the base 12 includes an integrally formed first mounting plate 14 and a second mounting plate 15; the first mounting plate 14 is arranged at the bottom of the duct machine housing 10, and the motor 13 is installed on the first mounting plate 14; the second mounting plate 15 is perpendicular to the first mounting plate 14, and a avoidance hole is arranged on the second mounting plate 15, and the driven shaft 31 passes through the avoidance hole and is connected to the motor 13. The duct machine air inlet structure adopts an integrally formed L-shaped mounting plate, reasonably arranges the position of the motor 13, and sets the avoidance hole to cooperate with the driven shaft 31, so as to form a base 12 structure with a compact structure, convenient installation, and easy maintenance.

[0034] Specifically, the base 12 is composed of an integrally formed first mounting plate 14 and a second mounting plate 15, which are arranged in an L-shape, which not only ensures the compactness and strength of the structure of the base 12, but also simplifies the manufacturing process. Among them, the first mounting plate 14 is connected to the bottom of the air duct housing 10 to provide a stable support base; the second mounting plate 15 is perpendicular to the first mounting plate 14, providing a suitable space and limit structure for the connection between the motor 13 and the driven shaft 31. The motor 13 is installed at the angle formed by the first mounting plate 14 and the second mounting plate 15, which not only makes full use of the mounting base provided by the first mounting plate 14, but also facilitates the transmission connection with the driven shaft 31.

[0035] The first mounting plate 14 and the duct machine housing 10 and the motor 13 can be installed and matched with screws and other fixings. This type of standardized connection method is easy to operate, convenient to disassemble and assemble, and has reliable connection strength, which is conducive to later maintenance or equipment upgrades. During the installation process, the driven shaft 31 of the sound insulation guide plate 30 is first passed through the avoidance hole on the second mounting plate 15 to achieve preliminary fixation, and then the motor 13 is matched with the driven shaft 31 and the first mounting plate 14 in turn. The step-by-step installation method is clear and reduces the difficulty of installation.

[0036] According to an air intake structure of a duct machine provided by the utility model, U-shaped plates 32 perpendicular to the plate surface are respectively provided at both ends of the length direction of the sound insulation guide plate 30; and the driven shaft 31 is vertically provided on the U-shaped plate 32. Specifically, U-shaped plates 32 perpendicular to the plate surface are respectively provided at both ends of the length direction of the sound insulation guide plate 30. The shape of the U-shaped plate 32 allows the plate body of the sound insulation guide plate 30 to have a wider range of motion when rotating (equivalent to a swing arm), and the plate body can deviate from the rotation axis at a greater distance, thereby having more sufficient space for movement when adjusting the tilt angle. There is sufficient space on the U-shaped plate 32, which provides a good support foundation for the connection between the driven shaft 31 and the sound insulation guide plate 30. On this basis, a reinforcing rib structure can be added, such as a rib plate, a support column, etc., between the U-shaped plate 32 and the driven shaft 31, to improve the rigidity and stability of the structure, thereby dispersing the stress generated during the rotation process, preventing the deformation of the driven shaft 31 or fatigue failure of the connection part due to excessive local force, thereby extending the service life of the sound insulation guide plate 30 and the connection part with the driven shaft 31. By arranging U-shaped plates 32 perpendicular to the plate surface at both ends of the sound insulation guide plate 30, and vertically installing the driven shaft 31 on the U-shaped plate 32, not only a larger activity space is provided for the sound insulation guide plate 30 to meet a wider range of noise reduction needs, but also the overall structural strength is enhanced by adding a reinforcing rib structure to ensure long-term stable operation.

[0037] According to a duct air inlet structure provided by the utility model, the sound insulation guide plate 30 is covered with a sound insulation cushion layer on the surface of one side facing the air inlet to enhance the overall noise reduction effect. Specifically, the sound insulation cushion layer can be made of materials with good sound absorption properties such as sound insulation cotton and sound-absorbing felt. These materials have a porous and fluffy structure, which can effectively absorb and consume sound wave energy, reduce the reflection and propagation of sound waves, and further weaken the diffusion of noise into the room near the source of noise. The sound insulation guide plate 30 itself has the function of changing the noise propagation path and reducing the direct downward propagation of noise through its inclined setting. On this basis, the additional sound insulation cushion layer provides a second noise reduction barrier, which can directly absorb and attenuate the remaining noise passing through the guide plate, so that the noise energy carried by the air passing through the guide plate is significantly reduced before entering the duct air conditioner.

[0038] The above-mentioned sound insulation pad layer can be fixed on the sound insulation guide plate 30 by pasting or embedding. Preferably, according to a duct air inlet structure provided by the utility model, the sound insulation pad layer is detachably adhered to the sound insulation guide plate 30. Since the sound insulation pad layer is detachably adhered to the sound insulation guide plate 30, when the pad layer needs to be replaced due to the degradation of sound absorption performance, aging, contamination, etc. caused by long-term use, it only needs to be peeled off from the guide plate and a new sound insulation pad layer is pasted. There is no need to disassemble the entire air inlet structure on a large scale, which greatly simplifies the replacement process and significantly reduces maintenance costs and time. The above-mentioned detachable adhesion method may include any one of the following: AB Velcro (Magic Tape), magnetic suction type, adhesive type (removable tape or adhesive), etc.

[0039] According to an air intake structure of a duct machine provided by the utility model, the air intake grille 20 includes a straight portion 21 and an arcuate portion 22; the straight portion 21 is parallel to the horizontal direction; the arcuate portion 22 is bent upward from the side of the straight portion 21 close to the rear end of the duct machine to form a curved rear air inlet. The straight portion 21 of the air intake grille 20 is parallel to the horizontal direction, corresponding to the traditional vertical downward air inlet, which is convenient for introducing air from the indoor space below. The arcuate portion 22 is bent upward from the side of the straight portion 21 close to the rear end of the duct machine to form a curved rear air inlet. This design allows the duct machine to not only inhale air from below, but also introduce air from the arcuate air inlet at the rear end of the duct machine, realizing a diversified air intake mode, which helps to increase the air intake area under the limited size of the duct machine, thereby increasing the air intake volume. The design of the arc portion 22 makes full use of the space from the bottom to the rear end of the duct unit. Through the arc transition, the area that may have been idle is converted into an effective air inlet, so that the air intake efficiency of the duct unit is improved without increasing the overall volume. In practical applications, the arc portion 22 can be hidden in the ceiling and integrated with the interior decoration, maintaining the aesthetics of the concealed installation of the duct unit. The straight portion 21 corresponds to the ceiling opening leading to the room, ensuring smooth air intake.

[0040] According to an air intake structure of a duct machine provided by the utility model, the air intake grille 20 includes a grid structure formed by multiple rows of transverse grid plates and multiple columns of longitudinal grid plates; the grid structure is adapted to the shape of the straight portion 21 and the curved portion 22; the plate surfaces of the transverse grid plates and the longitudinal grid plates are perpendicular to the horizontal direction. Among them, the grid structure is composed of criss-crossed transverse grid plates and longitudinal grid plates, forming a regularly arranged airflow passage, which can effectively guide the airflow entering the duct machine to flow in an orderly manner along the grid plate direction, reduce airflow turbulence, reduce the vortex, turbulence and other phenomena generated thereby, and thus help reduce aerodynamic noise. Whether it is the air intake below the straight portion 21 or the air intake at the rear end of the curved portion 22, it can smoothly enter the interior of the duct machine through the grid structure that matches its shape, ensuring that the airflow entering from any direction can be effectively guided by the grid plate to maintain the consistency of the airflow direction. By adopting the air inlet grille 20 with a grid structure, effective guidance and rectification of the airflow is achieved, the wind direction consistency of the air inlet from different directions is ensured, and at the same time, the shapes of the straight portion 21 and the arc portion 22 are adapted to improve the air intake efficiency.

[0041] According to a duct air inlet structure provided by the utility model, the sound insulation guide plate 30 has a closed state and an open state; in the closed state, the sound insulation guide plate 30 is parallel to the straight portion 21; in the open state, the angle between the sound insulation guide plate 30 and the straight portion 21 is greater than 0 degrees and less than 90 degrees. Among them, in the closed state, the sound insulation guide plate 30 is parallel to the straight portion 21 of the air inlet grille 20, and at this time, the sound insulation guide plate 30 partially blocks the air inlet at the bottom of the duct air inlet. This setting can reduce the air intake of the duct air inlet during certain specific periods (such as at night and under low load operation), reduce noise emissions, and meet the user's demand for a quiet environment. In the open state, the sound insulation guide plate 30 can be adjusted to a suitable tilt angle according to actual use needs, which can not only ensure sufficient air intake to meet the normal operation of the air conditioning system, but also effectively block the propagation of noise into the room through its tilt setting, achieving a balance between noise reduction and air intake efficiency. On the other hand, in the closed state, the sound insulation guide plate 30 is flush with the straight portion 21, forming a neat and unified visual effect when viewed from the interior, thereby improving the overall coordination between the duct unit and the interior decoration and enhancing the aesthetics of the concealed installation.

[0042] The duct air conditioner provided by the present invention is described below. The duct air conditioner described below and the air inlet structure of the duct air conditioner described above can be referred to each other.

[0043] The utility model also provides a duct air conditioner, comprising the duct air conditioner air inlet structure of any one of the above embodiments. The duct air conditioner adopts the duct air conditioner air inlet structure, which significantly reduces the noise impact on the indoor environment when the duct air conditioner is running.

[0044] Preferably, the duct air inlet structure of the duct air conditioner is provided with a sound insulation guide plate 30. The sound insulation guide plate 30 is located outside the duct air conditioner housing 10 and below the air inlet, and its plate surface is inclined relative to the horizontal direction, aiming to change the noise propagation path and reduce the direct propagation of noise into the room. The sound insulation guide plate 30 is preferably made of sound-absorbing material, has good sound absorption performance, and can effectively absorb and attenuate the noise energy passing through its surface. The sound insulation guide plate 30 has two working modes: closed state and open state. In the closed state, the guide plate is parallel to the straight portion 21, partially closing the bottom air inlet and reducing noise emission; in the open state, the guide plate can be adjusted to a suitable inclination angle according to actual needs, which can ensure sufficient air intake and effectively block noise, so that the duct air conditioner has flexible noise reduction control capabilities, which can be dynamically adjusted according to user needs or environmental changes to achieve a balance between noise reduction and air intake efficiency. In addition, in order to further improve the noise reduction effect and installation convenience, the sound insulation cushion layer is preferably attached to the sound insulation guide plate 30 in a detachable manner. When the sound insulation pad needs to be replaced or cleaned, the user can easily remove it, reducing maintenance costs and difficulty.

[0045] The utility model of the duct air conditioner, by virtue of its duct air intake structure, significantly reduces the noise impact of the duct air conditioner on the indoor environment during operation through diversified air intake, air flow guidance, flexible noise reduction control and other technical means. Whether it is the straight part 21 that takes in air from the bottom or the arc-shaped part 22 that introduces air from the rear end, both are rectified through the grid structure to reduce aerodynamic noise. The tilt setting and adjustability of the sound insulation guide plate 30, as well as the use of sound-absorbing materials, effectively block the spread of noise into the room, ensuring that the duct air conditioner can create a quiet and comfortable indoor environment for users while operating efficiently.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A duct air inlet structure, characterized in that: include: The air duct machine housing (10) is provided with an air inlet facing downward, and the air inlet is provided with an air inlet grille (20); A cross-flow fan (11) is arranged in the air duct housing (10) and is located above the air inlet; A sound insulation guide plate (30) is arranged outside the air duct machine housing (10) and is located below the air inlet. The plate surface of the sound insulation guide plate (30) is arranged to be inclined relative to the horizontal direction.

2. The air intake structure of the air duct machine according to claim 1, characterized in that: A base (12) is provided at the bottom of the air duct machine housing (10); The two bases (12) are respectively located on both sides of the air inlet; The sound insulation guide plate (30) is rotatably fitted between the two bases (12) so as to be able to adjust the inclination angle of the sound insulation guide plate (30) relative to the horizontal direction.

3. The air intake structure of the air duct machine according to claim 2, characterized in that: At least one of the bases (12) is provided with a motor (13), the sound insulation guide plate (30) is provided with a driven shaft (31), and the motor (13) is in transmission cooperation with the driven shaft (31) of the sound insulation guide plate (30).

4. The air intake structure of the air duct machine according to claim 3, characterized in that: The base (12) comprises a first mounting plate (14) and a second mounting plate (15) which are integrally formed; The first mounting plate (14) is arranged at the bottom of the air duct housing (10), and the motor (13) is mounted on the first mounting plate (14); The second mounting plate (15) is perpendicular to the first mounting plate (14); a relief hole is provided on the second mounting plate (15); and the driven shaft (31) passes through the relief hole and is drivingly connected to the motor (13).

5. The air intake structure of the air duct machine according to claim 3, characterized in that: The two ends of the sound insulation guide plate (30) in the length direction are respectively provided with U-shaped plates (32) perpendicular to the plate surface; The driven shaft (31) is vertically arranged on the U-shaped plate (32).

6. The air intake structure of the air duct machine according to claim 1, characterized in that: The surface of the sound insulation guide plate (30) on one side facing the air inlet is covered with a sound insulation cushion layer.

7. The air intake structure of the air duct machine according to claim 6, characterized in that: The sound insulation pad is detachably adhered to the sound insulation guide plate (30).

8. The air intake structure of the air duct machine according to any one of claims 1 to 7, characterized in that: The air inlet grille (20) comprises a straight portion (21) and an arc-shaped portion (22); The straight portion (21) is parallel to the horizontal direction; The arc-shaped portion (22) is bent upward from one side of the straight portion (21) close to the rear end of the air duct unit to form an arc-shaped rear air inlet.

9. The air intake structure of the air duct machine according to claim 8, characterized in that: The air inlet grille (20) comprises a grid structure formed by a plurality of rows of transverse grilles and a plurality of columns of longitudinal grilles; The grid structure is adapted to the shapes of the straight portion (21) and the arc portion (22); The plate surfaces of the transverse grid plates and the longitudinal grid plates are both perpendicular to the horizontal direction.

10. The air intake structure of the air duct machine according to claim 8, characterized in that: The sound insulation guide plate (30) has a closed state and an open state; In the closed state, the sound insulation guide plate (30) is parallel to the straight portion (21); In the open state, the angle between the sound insulation guide plate (30) and the straight portion (21) is greater than 0 degrees and less than 90 degrees.

11. A duct machine, characterized in that: The invention comprises the air inlet structure of the air duct machine as described in any one of claims 1 to 10.

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