Fresh air device

Abstract

The utility model discloses a kind of fresh air equipment, including cabinet, fan assembly, wet curtain assembly, swing leaf assembly and transmission mechanism, cabinet is equipped with air inlet, air outlet and the air duct of intercommunication both;Fan assembly includes motor and impeller assembly, impeller assembly is placed in air duct and is driven by motor;Wet curtain assembly is set correspondingly air inlet;Swing leaf assembly includes a plurality of rotatable swing leaf, is located in air outlet;Transmission mechanism connects swing leaf assembly and motor, so that motor synchronous drive impeller rotation and swing leaf swing, so that air treatment process and conveying process do not interfere each other, both ensure purification effect, and maintain stable airflow transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fresh air equipment technology, and particularly to fresh air equipment. Background Technology

[0002] With rapid urbanization and increased building airtightness, indoor air quality issues are becoming increasingly prominent. Traditional fresh air systems generally suffer from technical bottlenecks such as uneven airflow and low purification efficiency. While water curtain purification can intercept particulate matter through a water curtain, its single purification method is insufficient to cope with complex indoor pollution environments. Conventional fresh air equipment often uses a fixed air supply structure, leading to uneven airflow distribution—excessive airflow velocity near the air outlet can cause discomfort, while areas further away suffer from insufficient fresh air coverage. Furthermore, traditional equipment cannot cool the fresh air during hot seasons, and its filtration system often only has a single-layer filter, resulting in limited efficiency in intercepting fine particulate matter such as PM2.5. More importantly, existing oscillating air supply mechanisms often use independent drive designs, increasing energy consumption and complicating the equipment structure. These shortcomings collectively limit the actual effectiveness of fresh air systems, making it difficult to fundamentally improve indoor air quality. Utility Model Content

[0003] The main purpose of this invention is to propose a fresh air device that aims to improve the uniformity of air supply, enhance purification efficiency, and achieve fresh air cooling.

[0004] To achieve the above objectives, this utility model proposes a fresh air device, comprising:

[0005] The housing has an air inlet and an air outlet, as well as an air duct connecting the air inlet and the air outlet;

[0006] A fan assembly includes a motor and an impeller assembly. The impeller assembly is disposed in the air duct and is used to drive airflow into the air duct from the air inlet and blow it out from the air outlet. The motor is driven to rotate by the impeller assembly.

[0007] The evaporative cooling pad assembly is provided corresponding to the air inlet;

[0008] A louver assembly is provided at the air outlet, and the louver assembly includes a plurality of rotatable louvers;

[0009] A transmission mechanism is connected between the plurality of blades and the motor, so that the motor can simultaneously drive the impeller assembly to rotate and the plurality of blades to oscillate.

[0010] In one embodiment, the impeller assembly includes an impeller shaft and a plurality of blades, the impeller shaft being drivenly connected to the motor, and the blades being spaced apart circumferentially along the impeller shaft;

[0011] The transmission mechanism is connected between the impeller shaft and the plurality of blades.

[0012] In one embodiment, the plurality of blades are distributed vertically and extend horizontally, and one end of each blade rotates about the horizontally extending axis.

[0013] The transmission mechanism includes:

[0014] A sliding member is slidably mounted on the housing in the vertical direction. The other end of the sliding member is connected to the other end of the plurality of oscillating blades via a hinge, so that when the sliding member slides in the vertical direction, it drives the plurality of oscillating blades to rotate; and,

[0015] A transmission assembly is connected between the sliding member and the impeller shaft.

[0016] In one embodiment, the transmission assembly includes:

[0017] A drive disk, connected to the impeller shaft, has a protrusion on its end face, the protrusion being offset from the rotation center of the drive disk; and...

[0018] A mating part is provided on the sliding member, and an elongated groove extending in the left and right direction is provided on the mating part, and the elongated groove slides in engagement with the protrusion.

[0019] In one embodiment, the cross-sectional area of ​​the housing gradually decreases from the air inlet to the air outlet.

[0020] In one embodiment, the fan assembly further includes a support member, one end of which is fixedly connected to the inner wall of the housing, and the other end of which is fixedly connected to the motor.

[0021] In one embodiment, the evaporative cooling pad assembly includes:

[0022] An installation frame is provided corresponding to the air inlet. A wet curtain component is provided inside the installation frame to form a water curtain on both sides of the installation frame.

[0023] A water supply assembly, extending at least partially to the upper edge of the mounting frame, is used to supply water to the wet curtain unit;

[0024] The fresh air equipment also includes a filter screen, which is disposed between the wet curtain assembly and the fan assembly and connected to the inner wall of the air duct, for secondary filtration of the fresh air in the air duct.

[0025] In one embodiment, the water delivery assembly includes:

[0026] A water pump has an outlet and an inlet;

[0027] The water supply pipe is connected at one end to the outlet of the water pump and at least partially connected to the top of the mounting frame.

[0028] In one embodiment, the mounting frame has a groove extending in the left-right direction at its bottom, and the fresh air device further includes a recycling component, which includes:

[0029] A water storage tank is located below the mounting frame and is connected to the water inlet of the water pump;

[0030] The filter has one end connected to the upper part of the water storage tank and the other end set at one end of the groove in the left and right direction, so as to receive and filter the water in the groove.

[0031] In one embodiment, the filter has a plurality of filter holes on one end face corresponding to the groove;

[0032] The recycling assembly also includes a water-separating platform arranged around the connection between the filter and the water storage tank.

[0033] In this invention, the motor drives the impeller assembly to rotate, generating negative pressure. External air enters the duct after being filtered by the evaporative cooling pad assembly. The transmission mechanism, through mechanical connection, converts some of the rotational power into the periodic oscillation of the blades, causing a continuous change in the airflow direction at the outlet. The tapered duct structure accelerates the airflow during transport, and combined with the directional guidance of the blades, forms an adjustable airflow pattern. The evaporative cooling pad assembly completes primary purification upon air entry, while the oscillation of the blades breaks up the airflow concentration caused by a fixed outlet direction. The coaxial connection between the transmission mechanism and the impeller ensures that the oscillation frequency of the blades automatically matches the fan speed, achieving a dynamic balance between airflow volume and airflow angle. Through this technical solution, this application effectively alleviates the airflow impact problem caused by uneven airflow in traditional fresh air equipment. By expanding the airflow coverage angle through the periodic oscillation of the blades, the airflow can reach the far reaches of the room. The synergistic effect of the evaporative cooling pad assembly and the blade assembly ensures purification efficiency while achieving dynamic airflow distribution and eliminating purification dead zones. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 A schematic diagram of an embodiment of the fresh air device provided by this utility model;

[0036] Figure 2 for Figure 1 Schematic diagram of the structure of the wind turbine components, transmission components, and blade components;

[0037] Figure 3 for Figure 2 A partial schematic diagram at point A in the middle;

[0038] Figure 4 for Figure 1 Schematic diagram of the structure of the wet curtain assembly;

[0039] Figure 5 for Figure 4 A partial schematic diagram at point B in the middle.

[0040] Explanation of icon numbers:

[0041] 100. Fresh air equipment; 1. Housing; 11. Air duct; 12. Air inlet; 13. Air outlet; 2. Fan assembly; 21. Motor; 22. Impeller assembly; 221. Impeller shaft; 222. Blades; 23. Support component; 3. Evaporative cooling pad assembly; 31. Mounting frame; 311. Evaporative cooling pad component; 312. Groove; 32. Filter screen; 33. Water supply assembly; 331. Water pump; 332. Water supply pipe; 4. Recovery assembly; 41. Water storage tank; 42. Filter; 421. Filter hole; 43. Water-proof platform; 5. Transmission mechanism; 51. Sliding component; 52. Hinge component; 53. Transmission assembly; 531. Drive disc; 532. Mating part; 5321. Protrusion; 533. Long groove; 6. Oscillating blade assembly; 61. Oscillating blade.

[0042] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0046] In existing technologies, traditional fresh air systems generally suffer from insufficient airflow uniformity. The fixed air outlet 13 design results in an airflow distribution that is excessively strong at the near end and insufficient at the far end. When the equipment is running, the area near the air outlet 13 is prone to discomfort due to the excessively high airflow velocity, while corners far from the air outlet 13 become purification blind spots because the airflow cannot effectively reach them. This uneven distribution not only affects the user experience but also reduces air purification efficiency, making it difficult to achieve an overall improvement in indoor air quality.

[0047] To resolve the above issues, please refer to Figure 1 and Figure 4 This application proposes a fresh air device 100, including a housing 1, a fan assembly 2, an evaporative cooling pad assembly 3, a swivel assembly 6, and a transmission mechanism 5. The housing 1 is provided with an air inlet 12, an air outlet 13, and an air duct 11 connecting the two; the fan assembly 2 includes a motor 21 and an impeller assembly 22, the impeller assembly 22 is placed in the air duct 11 and driven by the motor 21; the evaporative cooling pad assembly 3 is arranged corresponding to the air inlet 12; the swivel assembly 6 includes multiple rotatable swivels and is located at the air outlet 13; the transmission mechanism 5 connects the swivel assembly 6 and the motor 21, so that the motor 21 synchronously drives the impeller to rotate and the swivels to swing.

[0048] The casing 1 refers to the structural shell that carries the airflow channel. It can adopt a tapered air duct 11 design, with its cross-sectional area gradually decreasing from the air inlet 12 to the air outlet 13, optimizing the flow velocity distribution by changing the airflow cross-sectional area. The impeller assembly 22 in the fan assembly 2 refers to the airflow driving device containing rotating blades 222. It can adopt a centrifugal impeller structure and generate directional airflow driven by the motor 21. The wet curtain assembly 3 refers to a layer of hydrophilic material with a porous structure, which can be set at the front end of the air inlet 12 to form a continuous water film to intercept particulate matter using capillary action. The oscillating blade assembly 6 refers to an array of multiple guide vanes that can rotate around an axis. It can adopt a linked hinge structure and adjust the airflow direction by changing the angle. The transmission mechanism 5 refers to the power transmission device, which can adopt a cam-slider mechanism to convert the rotational motion of the motor 21 into the reciprocating oscillation of the oscillating blades.

[0049] Specifically, when the motor 21 drives the impeller assembly 22 to rotate, it generates negative pressure. External air, filtered by the wet curtain assembly 3, enters the air duct 11. The transmission mechanism 5, through a mechanical connection, converts part of the rotational power into the periodic oscillation of the blades, causing the airflow direction at the outlet 13 to continuously change. The tapered air duct 11 structure accelerates the airflow during transport, and, combined with the directional guiding effect of the blades, forms an adjustable air delivery mode. The wet curtain assembly 3 completes primary purification upon initial airflow, while the oscillation of the blades breaks the airflow concentration caused by the fixed outlet direction. The coaxial connection between the transmission mechanism 5 and the impeller ensures that the oscillation frequency of the blades automatically matches the fan speed, achieving a dynamic balance between airflow volume and delivery angle.

[0050] Compared to existing technologies, traditional equipment uses fan power solely to drive airflow, requiring an additional blade drive motor 21, resulting in complex structure and increased energy consumption. This solution achieves multi-functional output from a single power source through mechanical transmission, simplifying the equipment structure and avoiding the technical challenges of coordinated control of multiple motors 21. Existing technologies separate the fixed evaporative cooling pad and the independent blade drive system, making it difficult to simultaneously improve purification efficiency and airflow uniformity. This solution, through power diversion and structural integration, organically integrates airflow purification and distribution control.

[0051] Through the above technical solution, this application effectively alleviates the airflow impact problem caused by uneven air supply in traditional fresh air equipment 100. By expanding the air supply coverage angle through the periodic oscillation of the louvers, the airflow can reach the far-end areas of the room. The synergistic effect of the wet curtain assembly 3 and the louver assembly 6 ensures purification efficiency while achieving dynamic airflow distribution and eliminating purification dead zones. The linkage design between the transmission mechanism 5 and the fan improves energy utilization and avoids energy loss caused by multiple power sources.

[0052] Further, please refer to Figure 2 In one embodiment of this application, the impeller assembly 22 includes an impeller shaft 221 and a plurality of blades 222. The impeller shaft 221 is connected to the motor 21 in a driving connection. The transmission mechanism 5 is connected between the impeller shaft 221 and the plurality of blades 222 in a driving connection.

[0053] The impeller shaft 221 is a rotating shaft used to transmit the output power of the motor 21. It can be a hollow or solid shaft made of metal. Its two axial ends are fixedly connected to the output end of the motor 21 and the impeller assembly 22, respectively, ensuring the stability of power transmission. The blades 222 are curved surface structures distributed circumferentially along the impeller shaft 221. They can be injection-molded arc-shaped thin-plate structures. Multiple blades 222 are arranged at equal intervals to form a centrifugal impeller, used to convert rotational kinetic energy into airflow kinetic energy. The transmission mechanism 5 is a mechanical device used to convert the rotational motion of the impeller shaft 221 into the oscillating motion of the blades. It can be implemented using a linkage mechanism, gear set, or cam mechanism. Its input end is synchronously rotated with the impeller shaft 221, and its output end is linked with the oscillating blade assembly 6.

[0054] Specifically, when the motor 21 drives the impeller shaft 221 to rotate, multiple blades 222, under the action of centrifugal force, push the airflow to form a directional flow. Simultaneously, the rotation of the impeller shaft 221 is converted into periodic reciprocating motion through the transmission mechanism 5. The transmission mechanism 5 decomposes the unidirectional rotation of the impeller shaft 221 into oscillating motions with a phase difference, driving multiple blades to oscillate synchronously at a preset angle, thereby changing the airflow direction of the outlet 13. When the impeller speed changes, the transmission mechanism 5 automatically adjusts the oscillation frequency of the blades, dynamically matching the airflow diffusion angle with the wind speed to avoid excessively high or low wind speeds in localized areas.

[0055] Compared with existing technologies, traditional equipment requires separate blade drive motors 21 and impeller drive motors 21, resulting in complex structures and the risk of asynchronous operation. This solution integrates the impeller shaft 221 with the transmission mechanism 5, using a single power source to simultaneously drive airflow and adjust direction. This eliminates the space occupation problem caused by multiple motors 21 and ensures a strict correspondence between the impeller speed and the blade oscillation frequency, fundamentally solving the airflow turbulence caused by mechanical action mismatch.

[0056] Through the above technical solution, this application realizes the function of automatically adjusting the air outlet angle according to the impeller speed. When the equipment is in low wind speed mode, the blades increase the unfolding angle to expand the airflow coverage area; when switching to high wind speed mode, the blades decrease the unfolding angle to concentrate the airflow delivery distance. This dynamic adjustment mechanism effectively balances the contradictory relationship between airflow distribution intensity and coverage area, so that areas at different locations from the air outlet 13 can obtain a uniform supply of fresh air.

[0057] Please see Figure 3In one embodiment of this application, multiple blades are distributed vertically and extend horizontally, and one end of each blade rotates around the horizontally extending axis; a sliding member 51 is slidably mounted on the housing 1 vertically, and the other end of the sliding member 51 is connected to the other end of the multiple blades through a hinge member 52; a transmission assembly 53 is connected between the sliding member 51 and the impeller shaft 221.

[0058] The vertical direction refers to the arrangement direction of the blades, which can be achieved horizontally, allowing multiple blades to be spaced out horizontally to form an adjustment structure covering the width of the air outlet 13. The horizontal direction refers to the extension direction of the blades, which can be achieved vertically, allowing the blades to extend vertically and increase the contact area with the airflow. The sliding member 51 is a driving component that moves vertically, which can be implemented as a slider with a guide groove, driving multiple blades to rotate synchronously through linear motion. The hinge 52 is a movable connection structure that connects the blades and the sliding member 51, which can be implemented as a ball joint or a pivot pin, converting the linear displacement of the sliding member 51 into the rotational motion of the blades. The transmission component 53 is a mechanism that converts the rotational motion of the impeller shaft 221 into the linear motion of the sliding member 51, which can be implemented as a structure with an eccentric wheel and an elongated groove 533, using the rotational eccentricity to drive the sliding member 51 to reciprocate.

[0059] Specifically, when the impeller shaft 221 rotates, it drives the drive disk 531 to rotate. The protrusion 5321 on the end face of the drive disk 531 slides within the elongated groove 533, converting the rotational motion into the linear reciprocating motion of the sliding member 51. When the sliding member 51 moves vertically, it pulls each blade around its axis through the hinge 52, and the swing angle of all blades changes synchronously with the position of the sliding member 51. The extension length of the blades in the left and right directions allows them to change the guiding area of ​​the air outlet 13 when they rotate. Multiple blades are distributed vertically to form a continuously adjustable guiding surface, thereby controlling the diffusion range of the airflow in the horizontal direction. The direct connection between the transmission assembly 53 and the impeller shaft 221 allows the power of the fan to be reused during operation, eliminating the need for an additional blade drive device.

[0060] Compared to existing technologies, traditional fresh air equipment 100 typically uses independent motors 21 to drive or manually adjust the oscillating blades, resulting in a complex structure and difficulty in synchronously controlling the oscillation angle. This solution, however, achieves multi-blade linkage through a single transmission mechanism 5, utilizing the fan's own power to drive the blade oscillation. This simplifies the mechanical structure and ensures the synchronicity of the blade movements. In existing technologies, the oscillating blade rotation axes are mostly arranged in parallel, limiting the airflow coverage angle. In contrast, the layout of the oscillating blades rotating around left-right axes in this solution guides the airflow to different height areas during oscillation, creating a three-dimensional diffusion effect.

[0061] Through the above technical solution, this application can automatically adjust the swing amplitude of the blades according to the fan speed, so that the airflow direction of the outlet 13 is adjusted synchronously with the change of air supply intensity. When the fan is running at high speed, the swing angle of the blades increases, expanding the airflow diffusion range to avoid local strong wind impact; when the fan is running at low speed, the swing angle of the blades decreases to maintain a longer air supply distance. The synchronous swing of multiple blades ensures the coordinated change of airflow direction at each position of the outlet 13, eliminating the turbulence phenomenon caused by asynchronous blade movements in traditional equipment, and achieving uniform airflow distribution in the indoor space.

[0062] In one embodiment of this application, the transmission assembly 53 includes a drive disk 531 and a mating portion 532. The drive disk 531 is connected to the impeller shaft 221, and a protrusion 5321 is provided on the end face of the drive disk 531, which is offset from the rotation center of the drive disk 531. The mating portion 532 is provided on the sliding member 51, and an elongated groove 533 extending in the left-right direction is provided on the mating portion 532, which slides in engagement with the protrusion 5321.

[0063] The drive disk 531 is a rotating component coaxially connected to the impeller shaft 221. It can be implemented using a metal disk structure, with a protrusion 5321 on its end face offset from the center, creating an eccentric trajectory during rotation. This structure converts the rotational motion of the impeller shaft 221 into the circular motion trajectory of the protrusion 5321. The mating part 532 is a guide component fixed to the sliding member 51. It can be implemented using a metal block with a groove 312. The elongated groove 533 extends in the same direction as the axis of rotation of the vane, constraining the motion trajectory of the protrusion 5321. This structure converts the circular motion of the protrusion 5321 into the linear reciprocating motion of the sliding member 51. The elongated groove 533 is a strip-shaped through-hole extending in the left-right direction, which can be formed by milling. Its length direction is perpendicular to the motion direction of the sliding member 51. This structure allows the protrusion 5321 to slide within the groove while restricting its lateral displacement, ensuring that the sliding member 51 moves only in a single direction.

[0064] Specifically, when the impeller shaft 221 drives the drive disk 531 to rotate, the protrusion 5321 moves in a circular motion around the center of the drive disk 531. Because the protrusion 5321 is off-center from the rotation center, its motion trajectory forms an eccentric circular path. The elongated groove 533 of the mating part 532 extends laterally, forming a sliding fit with the protrusion 5321, decomposing the circular motion of the protrusion 5321 into a lateral sliding component along the elongated groove 533 and a linear displacement component of the driving sliding member 51 along the vertical direction. During the linear reciprocating motion, the sliding member 51 drives multiple blades to rotate synchronously around its axis via the hinge 52. This motion conversion process requires no additional power source; it directly utilizes the fan power to achieve synchronous matching between the blade oscillation frequency and the impeller speed.

[0065] Compared with existing technologies, traditional pendulum drive devices require a separate motor 21 or a complex gear transmission system, resulting in complex structures and high costs. Existing technologies using linkage mechanisms pose a risk of motion interference and make it difficult to achieve synchronous control of multiple pendulums. This solution, through the cooperative structure of the drive disc 531 and the elongated groove 533, directly converts rotational motion into linear reciprocating motion, eliminating energy losses caused by multi-stage transmissions. Simultaneously, a single sliding element 51 enables synchronous driving of multiple pendulums, effectively simplifying the mechanical structure.

[0066] Through the above technical solution, this application achieves automatic matching between the oscillation amplitude of the blades and the fan speed. When the fan is running at high speed, the oscillation amplitude of the blades is increased to expand the air supply coverage, while at low speed, the oscillation amplitude is reduced to avoid airflow turbulence. The periodic oscillation of the blades causes the airflow direction of the outlet 13 to change continuously, promoting the formation of turbulent diffusion of fresh air in the room, thus solving the problem of excessively strong near-end airflow and insufficient far-end air supply caused by traditional fixed outlets 13.

[0067] In one embodiment of this application, the cross-sectional area of ​​the housing 1 is gradually reduced from the air inlet 12 to the air outlet 13.

[0068] The gradual reduction in cross-sectional area refers to the continuous reduction of the geometric dimensions of the cross-section of the air duct 11 in the direction of airflow. This can be achieved by using a conical structure or a tapered curved surface structure. For example, the inlet 12 has a rectangular cross-section and the outlet 13 has a trapezoidal cross-section, forming a contracting flow channel through linear or nonlinear transitions. This structure changes the airflow area within the air duct 11, prompting the fluid to flow faster and creating a pressure gradient.

[0069] Specifically, the tapered air duct 11 is designed with a continuously varying cross-sectional area along the airflow direction. When the airflow enters from the inlet 12 with a larger cross-section, it is accelerated by the constraint of the contracting duct. During this process, the guiding effect formed by the duct wall laminates the airflow, preventing vortex separation caused by abrupt changes in cross-sectional area. By controlling the contraction ratio and duct length parameters, the dynamic pressure distribution of the airflow at the outlet 13 tends to be uniform, thereby reducing the impact effect caused by excessively high local flow velocities while maintaining effective airflow delivery to the distant area.

[0070] Compared to existing technologies, traditional fresh air equipment 100 mostly adopts a straight-tube air duct 11 with a constant cross-section or a local diffuser structure. Such designs easily lead to the formation of a high-speed zone in the center and a low-speed zone at the edge of the air outlet 13. In contrast, the tapered air duct 11, through continuous changes in cross-sectional area, allows the airflow to continuously adjust its velocity distribution during the flow process, effectively eliminating turbulent energy loss caused by abrupt changes in cross-sectional area, thereby improving the uniformity of airflow.

[0071] Through the above technical solution, this application enables the fresh airflow to form a stable laminar flow state at the air outlet 13, reducing the airflow impact intensity in the near-end area while improving the air supply coverage in the far-end area, thus solving the problem of poor local purification effect caused by uneven air supply in traditional equipment. Specifically, the guiding effect of the tapered flow channel maintains the continuity of momentum transfer in the flow direction, avoiding energy loss caused by sudden changes in flow velocity, thereby improving overall air supply efficiency.

[0072] In one embodiment of this application, the fan assembly 2 further includes a support member 23, one end of which is fixedly connected to the inner wall of the housing 1, and the other end is fixedly connected to the motor 21.

[0073] The support component 23 refers to the rigid connection structure connecting the motor 21 to the inner wall of the housing 1. It can be implemented using metal rods or composite brackets, and its cross-sectional shape can be circular, rectangular, or irregular. It forms an anti-torque support system by fixing both ends. The fixed connection refers to a rigid connection method that is either non-removable or detachable. This can be achieved through welding, bolting, or snap-locking, ensuring a stable three-dimensional positioning structure between the support component 23, the housing 1, and the motor 21.

[0074] Specifically, the two ends of the support member 23 form rigid constraints with the inner wall of the casing 1 and the housing 1 of the motor 21, respectively, forming a spatial truss structure in the region where the cross-sectional area of ​​the air duct 11 gradually decreases. When the impeller assembly 22 rotates within the variable cross-section air duct 11, the support member 23 absorbs the vibration energy generated by the operation of the motor 21 through its own rigidity, preventing the vibration from being transmitted through the casing 1 and causing airflow disturbance. At the same time, the installation angle of the support member 23 can be adjusted according to the tapering angle of the air duct 11, so that the axis of the motor 21 coincides with the center line of the air duct 11, ensuring that the airflow generated by the impeller rotation accelerates uniformly along the tapering air duct 11.

[0075] Compared with existing technologies, traditional fresh air equipment 100 often uses single-point suspension or elastic support in the variable cross-section duct 11, which cannot effectively suppress the swaying displacement of the motor 21 in the asymmetric flow field. This solution eliminates the influence of uneven pressure distribution in the variable cross-section duct 11 on the positioning of the motor 21 by constructing a support system with rigid connection at both ends, and avoids the impeller eccentric rotation phenomenon caused by insufficient support stiffness.

[0076] Through the above technical solution, this application achieves precise spatial positioning of motor 21 in variable cross-section air duct 11, effectively suppresses turbulence caused by equipment vibration during airflow acceleration, ensures the linear control effect of the gradually changing cross-sectional area design of air duct 11 on airflow speed, and improves the uniformity of fresh air delivery and the reliability of equipment operation.

[0077] In one embodiment of this application, the wet curtain assembly 3 includes a mounting frame 31 corresponding to the air inlet 12, a wet curtain element 311 is provided in the mounting frame 31 to form a water curtain on both sides of the mounting frame 31, and a water supply assembly 33 extends at least partially to the upper frame of the mounting frame 31 to add water to the wet curtain element 311. The fresh air equipment 100 also includes a filter screen 32 disposed between the wet curtain assembly 3 and the fan assembly 2 and connected to the inner wall of the air duct 11 to perform secondary filtration of the fresh air in the air duct 11.

[0078] The mounting frame 31 refers to the frame structure that supports the evaporative cooling pad 311. Specifically, it can be a rectangular frame formed by splicing aluminum alloy profiles. Its installation position corresponding to the air inlet 12 ensures that airflow preferentially contacts the evaporative cooling pad 311. The evaporative cooling pad 311 is a water-absorbing material with a porous structure, specifically a honeycomb paper substrate. It forms a continuous water film on its surface through capillary action, constituting a water curtain. The water supply component 33 is a device for replenishing water to the evaporative cooling pad 311. Specifically, it can be a water supply system with microporous spray pipes. The spray pipes arranged along the upper edge of the mounting frame 31 can achieve uniform water distribution. The filter screen 32 is a mesh structure with filtration function. Specifically, it can be a corrugated filter layer formed by folding HEPA filter paper. It is positioned downstream of the evaporative cooling pad 311 to form a physical filtration barrier.

[0079] Specifically, when the fresh airflow passes through the air inlet 12, it first comes into contact with the water curtain formed by the wet curtain components 311 on both sides of the mounting frame 31. The water film intercepts suspended particles and soluble pollutants in the airflow through adsorption. The water supply component 33 continuously replenishes water to the top of the wet curtain components 311 to ensure that the water curtain remains completely covered under the impact of the airflow. The airflow treated by the water curtain continues to flow to the fan component 2, and undergoes secondary filtration through the filter screen 32 fixed in the air duct 11. The dense structure of the filter screen 32 can capture fine particles that have not been adsorbed by the water curtain. At the same time, the arrangement of the filter screen 32 between the wet curtain component 3 and the fan component 2 effectively prevents water mist from spreading with the airflow, avoiding moisture in the fan component 2.

[0080] Compared to existing technologies, traditional fresh air systems typically employ a single filter 32 or an independent water curtain device, resulting in purification blind spots and an inability to control water mist diffusion. This solution utilizes a combination of a water curtain and filter 32 to form a dual purification mechanism. The porous structure of the wet curtain component 311 increases the gas-liquid contact area, while the physical interception of the filter 32 compensates for the insufficient purification of non-hydrophilic pollutants by water treatment. The integrated design of the water supply component 33 and the mounting frame 31 avoids the problem of localized drying of the water curtain caused by traditional drip-type water supply, and the positioning of the filter 32 achieves both secondary filtration and gas-liquid separation.

[0081] Through the above technical solution, this application can effectively improve the interception efficiency of suspended particulate matter such as PM2.5, while enhancing the removal capacity of gaseous pollutants such as formaldehyde. The continuous coverage of the water curtain avoids the flow interruption phenomenon caused by airflow impact in traditional water curtain devices, and the setting of filter 32 ensures the purification effect while preventing water vapor from entering the fan system. This multi-stage purification structure allows fresh air to undergo deep treatment before entering the room, while the reasonable layout avoids functional interference between different purification units.

[0082] Please see Figure 5 In one embodiment of this application, the water delivery assembly 33 includes a water pump 331 and a water delivery pipe 332. The water pump 331 has an outlet and an inlet, and one end of the water delivery pipe 332 is connected to the outlet of the water pump 331 and is at least partially connected to the top of the mounting frame 31.

[0083] Among them, water pump 331 refers to a power device used to transport liquids, which can be implemented by centrifugal water pump 331 or diaphragm water pump 331. Its outlet and inlet form a closed loop to realize water circulation. Water delivery pipe 332 refers to a tubular structure used to guide the direction of water flow, which can be implemented by flexible silicone pipe or rigid PVC pipe. It can be connected to the top of the mounting frame 31 to realize gravity water distribution.

[0084] Specifically, water pump 331 receives water treated by the recovery component 4 through its inlet, pressurizes it, and outputs it to water supply pipe 332 through its outlet. Water supply pipe 332 extends laterally along the top of mounting frame 31, with several outlet holes on its surface. Water flows through these holes to evenly wet the top area of ​​the wet curtain component 311. Under gravity, the water flows downwards along the surface of the wet curtain component 311, forming a continuous water film, avoiding the uneven wetting phenomenon caused by traditional side water supply. The separate design of the inlet and outlet allows water pump 331 to continuously draw circulating water from the water storage tank 41, forming a closed-loop water supply system.

[0085] Compared to existing technologies, traditional evaporative cooling pads often rely on open water tanks for natural infiltration or fixed-point water injection through a single pipe, leading to uneven water distribution and potential pad breakage. Common manual water filling methods in existing technologies cannot achieve continuous water supply, while simple straight-through pipes only provide effective wetting in localized areas. This solution, through a combination of a top horizontal water distribution pipe and a closed-loop water pump 331, achieves uniform wetting across the entire width of the evaporative cooling pad surface, while simultaneously establishing a water circulation path to reduce water consumption.

[0086] Through the above technical solution, this application solves the technical defect of uneven water addition to the evaporative cooling pad assembly 3, which leads to an incomplete cooling pad, and realizes the recycling of water resources. The top water distribution method allows water to naturally seep down along the surface of the evaporative cooling pad to form a continuous water film, avoiding the formation of localized dry areas. The closed-loop water supply system recovers and treats dripping water for reuse, effectively reducing water waste.

[0087] In one embodiment of this application, a groove 312 extending in the left-right direction is provided at the bottom of the mounting frame 31, and a recycling component 4 is provided. The recycling component 4 includes a water storage tank 41 and a filter 42. The water storage tank 41 is located below the mounting frame 31 and communicates with the inlet of the water pump 331. One end of the filter 42 is connected to the upper part of the water storage tank 41, and the other end corresponds to one end of the groove 312 in the left-right direction.

[0088] The groove 312 refers to a flow-guiding structure located at the bottom of the mounting frame 31 and extending horizontally. It can be implemented using a U-shaped or V-shaped groove and is used to collect wastewater falling from the water curtains on both sides of the wet curtain assembly 3. The water storage tank 41 is a container for temporarily storing recycled water. It can be made of plastic or metal, with its top opening connected to the filter 42 and its bottom connected to the inlet of the water pump 331 via a pipe, forming a circulating water path. The filter 42 is a device for removing impurities from the water. It can be implemented using a multi-layer filter screen 32 or an activated carbon filter element. Its inlet end corresponds to the end of the groove 312, and its outlet end connects to the upper part of the water storage tank 41, achieving self-filtration of water flow through gravity.

[0089] Specifically, when the evaporative cooling pad assembly 3 is running, the water curtain flows down along both sides of the mounting frame 31, and some unevaporated water accumulates at the bottom. The groove 312, extending left and right, effectively intercepts and guides this wastewater, preventing water droplets from scattering outside the equipment. The water accumulated in the groove 312 flows to one end under gravity and enters the inlet of the filter 42. After the filter 42's multiple layers of filter screen 32 intercept solid particles, the purified water flows into the water storage tank 41 for temporary storage. The water in the water storage tank 41 is then pumped back to the top of the evaporative cooling pad assembly 3 by the water pump 331, forming a closed-loop circulation system. During this process, the positional correspondence between the groove 312 and the filter 42 ensures that the water flow can be transferred without additional power, and the connection path between the filter 42 and the water storage tank 41 prevents unfiltered water from directly entering the circulation system.

[0090] In some specific embodiments, the cross-sectional depth of the groove 312 can be 5-10 mm, and its inner wall can be provided with anti-slip texture to slow down the water flow. The volume of the water storage tank 41 can be 1.2-1.5 times the hourly water consumption of the wet curtain assembly 3 to ensure the buffer capacity of the circulation system. The installation angle of the filter 42 can be 3-5 degrees to promote water flow.

[0091] In some specific embodiments, the bottom of the groove 312312 can be configured as a sloped surface inclined towards the center, for example, forming an inclination angle of 3°-5°, so that the water flow naturally converges to the inlet of the filter 4242. The filter 4242 can be designed as a detachable structure, for example, using a snap-fit ​​connection, to facilitate periodic replacement of the filter element. A water level sensor, such as a float sensor, can be installed inside the water storage tank 4141 to automatically trigger the water replenishment device when the water level is lower than a set threshold.

[0092] Compared to existing technologies, traditional evaporative cooling systems directly discharge or simply collect and reuse the water at the bottom, resulting in water waste and the accumulation of impurities in the circulating water. This solution, through the cooperation of the directional flow guide groove 312 and the staged filter components, achieves water recycling while removing impurities, maintaining the humidification efficiency of the evaporative cooling pad assembly 3 and preventing pipe blockage. The vertical arrangement of the filter 42 and the water storage tank 41 utilizes gravity instead of the traditional pump-based filtration method, reducing energy consumption.

[0093] Through the above technical solution, this application effectively solves the problem of low water recovery efficiency at the bottom of the evaporative cooling pad, realizing the recycling of water resources. The groove 312 structure directs water flow and avoids water splashing, the filter 42 intercepts solid impurities to prevent the water pump 331 from clogging, and the connection between the water storage tank 41 and the water pump 331 forms a closed-loop system to reduce water consumption. This technical solution reduces maintenance frequency and wastewater discharge while maintaining normal equipment operation.

[0094] In one embodiment of this application, the filter 42 is provided with a plurality of filter holes 421 on one end face corresponding to the groove 312, and the recycling component 4 also includes a water-separating platform 43, which is arranged around the connection between the filter 42 and the water storage tank 41.

[0095] The filter holes 421 refer to the through-hole structure set on the end face of the filter 42. Specifically, they can be arranged in a circular, elliptical, or polygonal array. By increasing the filtration area, the impact force of the water flow is dispersed, preventing impurities from accumulating and clogging the filter. The water-separating platform 43 refers to the annular protrusion structure set around the connection port. Specifically, it can be made of rubber or plastic and integrally molded with the water storage tank 41. By preventing unfiltered water from flowing directly into the water storage tank 41 and limiting the range of water splashing, it ensures the uniqueness of the filtration path.

[0096] Specifically, when water containing impurities enters the recovery assembly 4 from the groove 312, multiple filter holes 421 divide the water flow into multiple fine streams, causing large particles of impurities to be trapped on the outside of the filter 42, reducing the probability of clogging at individual holes. The water-separating platform 43 surrounds the connection between the filter 42 and the water storage tank 41, forming an annular barrier higher than the water level. Unfiltered water cannot pass over the water-separating platform 43 and directly enter the water storage tank 41. At the same time, splashing water droplets are confined to the inner area of ​​the water-separating platform 43 and eventually flow back to the filter holes 421 to complete secondary filtration.

[0097] Compared to existing technologies, traditional water recycling systems typically employ a single filter inlet structure, which allows impurities to easily accumulate at the inlet, leading to blockages. Furthermore, they lack physical isolation measures for unfiltered water, posing a risk of leakage. This solution reduces the probability of localized blockages through distributed filter holes 421 and forces water flow through a water-separating platform 43 to complete the filtration process, preventing impurities from bypassing the filter element and entering the circulation system.

[0098] Through the above technical solution, this application achieves uniform interception of impurities during the water recycling process, prevents system shutdown caused by local blockage of the filter structure, and effectively isolates the contact path between unfiltered water and the water storage tank 41, avoiding contamination of the circulating water source by impurities and ensuring the continuous and stable operation of the water recycling system.

[0099] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A fresh air device, characterized in that include: The housing has an air inlet and an air outlet, as well as an air duct connecting the air inlet and the air outlet; A fan assembly includes a motor and an impeller assembly. The impeller assembly is disposed in the air duct and is used to drive airflow into the air duct from the air inlet and blow it out from the air outlet. The motor is driven to rotate by the impeller assembly. The evaporative cooling pad assembly is provided corresponding to the air inlet; A louver assembly is provided at the air outlet, and the louver assembly includes a plurality of rotatable louvers; A transmission mechanism is connected between the plurality of blades and the motor, so that the motor can simultaneously drive the impeller assembly to rotate and the plurality of blades to oscillate.

2. The fresh air device of claim 1, wherein, The impeller assembly includes an impeller shaft and multiple blades. The impeller shaft is connected to the motor drive, and the blades are spaced apart circumferentially along the impeller shaft. The transmission mechanism is connected between the impeller shaft and the plurality of blades.

3. The fresh air device of claim 2, wherein, The plurality of oscillating blades are distributed vertically and extend horizontally, and one end of each oscillating blade rotates about the horizontally extending axis. The transmission mechanism includes: A sliding member is slidably mounted on the housing in the vertical direction. The other end of the sliding member is connected to the other end of the plurality of oscillating blades via a hinge, so that when the sliding member slides in the vertical direction, it drives the plurality of oscillating blades to rotate; and, A transmission assembly is connected between the sliding member and the impeller shaft.

4. The fresh air device of claim 3, wherein, The transmission assembly includes: A drive disk, connected to the impeller shaft, has a protrusion on its end face, the protrusion being offset from the rotation center of the drive disk; and... A mating part is provided on the sliding member, and an elongated groove extending in the left and right direction is provided on the mating part, and the elongated groove slides in engagement with the protrusion.

5. The fresh air device of claim 1, wherein, The cross-sectional area of ​​the casing gradually decreases from the air inlet to the air outlet.

6. The fresh air device of claim 5, wherein, The fan assembly also includes a support member, one end of which is fixedly connected to the inner wall of the housing, and the other end of which is fixedly connected to the motor.

7. The fresh air device of claim 1, wherein, The evaporative cooling pad assembly includes: An installation frame is provided corresponding to the air inlet. A wet curtain component is provided inside the installation frame to form a water curtain on both sides of the installation frame. A water supply assembly, extending at least partially to the upper edge of the mounting frame, is used to supply water to the wet curtain unit; The fresh air equipment also includes a filter screen, which is disposed between the wet curtain assembly and the fan assembly and connected to the inner wall of the air duct, for secondary filtration of the fresh air in the air duct.

8. The fresh air equipment as described in claim 7, characterized in that, The water delivery assembly includes: A water pump has an outlet and an inlet; The water supply pipe is connected at one end to the outlet of the water pump and at least partially connected to the top of the mounting frame.

9. The fresh air equipment as described in claim 8, characterized in that, The mounting frame has a groove extending in the left-right direction at its bottom. The fresh air device also includes a recycling component, which includes: A water storage tank is located below the mounting frame and is connected to the water inlet of the water pump; The filter has one end connected to the upper part of the water storage tank and the other end set at one end of the groove in the left and right direction, so as to receive and filter the water in the groove.

10. The fresh air device of claim 9, wherein, The filter has multiple filter holes on one end face corresponding to the groove; The recycling assembly also includes a water-separating platform arranged around the connection between the filter and the water storage tank.

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