Fan system and air conditioning system

Abstract

The application discloses a fan system and an air conditioner system, and relates to the technical field of fans, wherein the fan system comprises an air duct assembly, a cross-flow fan wheel and a flow guide piece, the air duct assembly is provided with an air outlet air duct; the cross-flow fan wheel is arranged at the inlet of the air outlet air duct, and the inner cavity of the cross-flow fan wheel has an air outlet area close to the air outlet air duct; the flow guide piece is rotatably arranged in the inner cavity of the cross-flow fan wheel, the flow guide piece has a guide surface, and the guide surface is arranged in an arc shape protruding towards the rotation center of the cross-flow fan wheel; under the drive, the flow guide piece can rotate relative to the cross-flow fan wheel, and at least part of the guide surface is located in the air outlet area. The technical scheme provided by the application aims at the inside of the fan wheel, a special airflow guide piece is designed, the position and angle of the guide piece are adjusted, the direction and path of the air flow are guided, the eccentric vortex is prevented from moving to the center of the fan wheel, the formation of circulating flow is reduced, the air supply efficiency is improved, and the surge phenomenon of the indoor unit is effectively relieved.

Description

Technical Field

[0001] This invention relates to the field of fan technology, and in particular to a fan system and an air conditioning system. Background Technology

[0002] Cross-flow fans are essential equipment widely used in air conditioning systems. During airflow within the fan, uneven airflow, irregular duct shape, obstructions, or uneven velocity field distribution can sometimes create rotating air vortices (vortices), known as "eccentric vortices." When the fan encounters external resistance (such as duct bends or filter blockages), the static pressure increases, causing the vortex core to shift. These vortices may then interact with the duct walls or other structures, leading to complex and unstable airflow. This unstable flow easily forms recirculation, where air repeatedly flows within the duct without moving forward. Increased recirculation consumes more energy but doesn't effectively increase the delivered airflow; instead, it significantly reduces the actual delivered airflow, resulting in severe airflow reduction within the indoor unit, significant surge phenomena, and a negative impact on the user experience. Summary of the Invention

[0003] The main objective of this invention is to propose a fan system and an air conditioning system, which aims to design a special airflow guide inside the fan wheel. By adjusting the position and angle of the guide, the direction and path of airflow can be guided, and the vortex center can be controlled near the inner circle of the fan wheel, thereby reducing the formation of circulating flow, improving air supply efficiency, and effectively alleviating the surge phenomenon of the indoor unit.

[0004] To achieve the above objectives, the present invention proposes a fan system comprising: The air duct assembly includes an air outlet duct; A cross-flow fan is disposed at the inlet of the air outlet duct, and the inner cavity of the cross-flow fan has an air outlet area close to the air outlet duct; and A flow guide is rotatably disposed in the inner cavity of the cross-flow impeller. The flow guide has a guide surface, which is arranged in an arc shape convex to the rotation center of the cross-flow impeller. Under drive, the guide member can rotate relative to the cross-flow fan wheel, so that at least a portion of the guide surface is located in the air outlet area.

[0005] In one embodiment, the air outlet duct has a first duct wall forming a volute tongue and a second duct wall corresponding to the first duct wall; the guide member has an initial position and a flow-blocking position; in the initial position, the guide member is located on the side of the volute tongue away from the second duct wall; in the flow-blocking position, the guide member is at least partially located on the side of the volute tongue closer to the second duct wall, so that at least a portion of the guide surface is located in the air outlet area.

[0006] In one embodiment, the line connecting the minimum gap between the cross-flow impeller and the first duct wall to the rotation center of the cross-flow impeller is L, and the centerline of the guide member is bisected from the center of the guide surface by M. The angle between L and M is β. At the initial position, β = 0°. At the obstruction position, 0° < β < 90°.

[0007] In one embodiment, the fan system further includes a flow guide drive member disposed on the duct assembly, the flow guide drive member driving the flow guide member to rotate circumferentially relative to the cross-flow fan wheel, thereby switching the flow guide member between an initial position and a flow blocking position.

[0008] In one embodiment, the fan system further includes a detection device for detecting the static pressure of the fan, a controller electrically connected to the detection device, and a fan wheel drive for driving the cross-flow fan wheel to rotate. The controller is also electrically connected to both the flow guide drive and the fan wheel drive. The controller is used to control the working state of the fan wheel drive and the flow guide drive based on the feedback from the detection device.

[0009] In one embodiment, if the static pressure of the fan fed back by the detection device is determined to be greater than or equal to a preset static pressure, the controller controls the fan wheel drive to increase the rotational speed of the cross-flow fan wheel and controls the flow guide drive to rotate the flow guide to the obstruction position.

[0010] In one embodiment, the greater the static pressure of the fan fed back by the detection device, the greater the β corresponding to the obstruction position to which the flow guide is turned by the controller.

[0011] In one embodiment, the wind turbine drive component is arranged on the same side of the flow guide drive component, and the flow guide drive component is mounted on the wind turbine drive component.

[0012] In one embodiment, the flow guide has a first connecting portion at one end along the axial direction and a second connecting portion at the other end. The first connecting portion is connected to the flow guide drive component, and the second connecting portion is rotatably connected to the cross-flow fan wheel.

[0013] In one embodiment, the first connecting part is configured as a convex shaft, and the end of the convex shaft near the second connecting part is also provided with a transmission tooth. The convex shaft is rotatably connected to the housing of the flow guide drive component. The flow guide drive component is configured as a servo motor, and the drive shaft of the servo motor is provided with a drive tooth, which meshes with the transmission tooth.

[0014] In one embodiment, the second connecting portion is provided with a groove for rotatable connection with the shaft of the cross-flow fan.

[0015] In one embodiment, the two ends of the guide member extend along the axial direction of the cross-flow impeller to both ends of the cross-flow impeller.

[0016] In one embodiment, the guide element is made of rigid plastic or metal.

[0017] In one embodiment, the guide surface is a smooth curved surface; the leeward side is provided with a reinforcing structure.

[0018] In one embodiment, the flow guide is offset from the rotation center of the cross-flow impeller.

[0019] The present invention also proposes an air conditioning system, which further includes a fan system.

[0020] The technical solution of this invention involves setting a guide component inside the cross-flow impeller. By adjusting the position and angle of the guide component, the curved guide surface guides the direction and path of airflow, thereby controlling the eccentric vortex center near the inner circle of the impeller and preventing vortex center deviation. When the vortex center is kept near the inner circle, the airflow is more stable, the recirculation flow is reduced, the air volume is maintained, and the air delivery efficiency is improved, thus avoiding surge phenomenon. Compared with traditional solutions that can only pre-improve the impact of installation or pipeline by changing the duct structure before installation, when the fan is subjected to external resistance (such as duct bending, filter blockage, etc.), the static pressure will increase, which will cause the position of the vortex center inside the fan to shift. This solution can control the position of the eccentric vortex through the guide component after the fan system is installed, preventing the vortex center from shifting, thereby reducing the formation of recirculation flow and improving air delivery efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is an exploded structural diagram of an embodiment of the fan system provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of one embodiment of the guide member; Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure; Figure 4 This is a cross-sectional structural schematic diagram of an embodiment of the fan system provided by the present invention; Figure 5This is a cross-sectional structural diagram of the wind turbine system provided by the present invention from another perspective.

[0023] Explanation of icon numbers: 100. Air duct assembly; 101. Volute; 110. Air outlet duct; 111. First air duct wall; 112. Second air duct wall; 200. Crossflow fan wheel; 201. Inner cavity; 210. Air outlet area; 300, flow guide; 301, guide surface; 302, leeward side; 310, first connecting part; 311, convex shaft; 312, transmission gear; 320, second connecting part; 321, connecting groove; 400. Flow guide drive component; 410. Servo motor; 411. Drive gear; 500. Wind turbine drive components; 600. Heat exchanger.

[0024] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this invention 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 technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, 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. When 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 invention.

[0028] Cross-flow fans are essential equipment widely used in air conditioning systems. During airflow within the fan, uneven airflow, irregular duct shape, obstructions, or uneven velocity field distribution can sometimes create rotating air vortices (vortices), known as "eccentric vortices." When the fan encounters external resistance (such as duct bends or filter blockages), the static pressure increases, causing the vortex core to shift. These vortices may then interact with the duct walls or other structures, leading to complex and unstable airflow. This unstable flow easily forms recirculation, where air repeatedly flows within the duct without moving forward. Increased recirculation consumes more energy but doesn't effectively increase the delivered airflow; instead, it significantly reduces the actual delivered airflow, resulting in severe airflow reduction within the indoor unit, significant surge phenomena, and a negative impact on the user experience.

[0029] Surge is a serious aerodynamic phenomenon that can cause a sharp decline in system performance and even damage equipment. Therefore, it is crucial to reduce circulating flow and suppress airflow attenuation by controlling the position of the vortex core.

[0030] Currently, indoor units of HVAC systems include ductwork components. Inside the ductwork components are sequentially connected fan chambers, diffuser chambers, and heat exchange chambers. The fan chamber contains a fan, the heat exchange chamber contains a heat exchanger, and the diffuser chamber is used to receive the airflow from the fan chamber and diffuse it to increase the pressure and flow rate of the airflow, thereby improving the cooling or heating effect.

[0031] Existing improvement solutions typically only involve modifying the duct structure before installation, offering pre-emptive improvements to mitigate the impact of installation or piping issues. The solutions employed are as follows: 1. A return channel is set at the diffuser chamber, so that the low-speed airflow can re-enter the front end of the fan through the return channel. This improves the fan's air delivery effect, reduces the impact of the airflow on the diffuser chamber, and reduces the noise generated between the fan impeller and the diffuser chamber.

[0032] 2. At both ends of the impeller, a 3D groove structure is set at the diffuser cavity position to reduce the low-speed airflow in the diffuser cavity from flowing back into the fan cavity through the assembly gap on both sides of the impeller, thereby effectively alleviating the surge phenomenon of the indoor unit. However, it will increase the resistance in the system and reduce the air volume at the outlet. 3. Vent holes are provided on the wall of the diffuser chamber closer to the heat exchanger than the fan. The vent holes connect the diffuser chamber to the outside, allowing the low-speed airflow in the diffuser chamber to flow out to the outside. This reduces the possibility of the airflow flowing through the diffuser chamber flowing back to the fan, effectively alleviating the surge phenomenon of the indoor unit, but it will lead to a reduction in the air volume at the outlet.

[0033] The above solutions cannot address the issue of increased external static pressure when the fan encounters external resistance (such as duct bends or filter blockages). This increases the position of the vortex core inside the fan, potentially causing the vortex to interact with the duct wall or other structures, resulting in complex and unstable airflow. This unstable flow easily leads to recirculation, where air repeatedly flows within the duct without moving forward. Increased recirculation consumes more energy but does not effectively increase the airflow; instead, it significantly reduces the actual delivered airflow. Furthermore, this severe airflow reduction can cause surge phenomena.

[0034] To address this, the present invention proposes a fan system that incorporates a specially designed airflow guide within the impeller. By adjusting the position and angle of the guide, the direction and path of airflow are guided, keeping the vortex center near the inner circle of the impeller. This reduces the formation of circulating airflow, improves air delivery efficiency, and effectively alleviates the surge phenomenon of the indoor unit.

[0035] Please see Figures 1 to 5 In one embodiment of the present invention, the fan system includes a duct assembly 100, which has a fan cavity, a diffuser cavity and a heat exchange cavity connected in sequence inside the duct assembly 100. The fan cavity is provided with a cross-flow impeller 200, the heat exchange cavity is provided with a heat exchanger, and the diffuser cavity is used to receive the airflow blown from the fan cavity and diffuse it to increase the pressure and flow rate of the airflow, thereby improving the cooling or heating effect.

[0036] The fan cavity, diffuser cavity, and heat exchange cavity constitute the air outlet duct 110. The inner cavity 201 of the cross-flow fan 200 has an air outlet area 210 with an inlet (diffuser cavity inlet) near the air outlet duct 110. The cross-flow fan 200 draws air into the fan cavity and blows the air into the diffuser cavity. The duct assembly 100 is shaped like a volute. The flow channel of the diffuser cavity gradually expands along the airflow direction. The heat exchanger 600 is arranged in the heat exchange cavity. In this way, the airflow is guided through the cross-flow fan, diffuser cavity, and heat exchange cavity to achieve cooling or heating effects.

[0037] Combination Figure 2 and Figure 3 To address the issue of eccentric vortex deviation caused by increased system static pressure, a guide member 300 is rotatably disposed inside the cross-flow impeller 200. The guide member 300 has a guide surface 301 and a leeward surface 302 opposite to the guide surface 301. The guide surface 301 is curved in an arc shape toward the leeward surface 302. The guide surface 301 faces the rotation center of the cross-flow impeller 200. Under drive, the guide member 300 can rotate relative to the cross-flow impeller 200, so that at least a portion of the guide surface 301 corresponds to the air outlet side, thereby blocking the airflow blown out from the location of the guide surface 301.

[0038] It should be noted that the flow guide 300 and the cross-flow fan 200 are independently set and can rotate freely from each other.

[0039] The technical solution of this invention involves setting a guide member 300 inside the cross-flow impeller 200. By adjusting the position and angle of the guide member, the curved guide surface 301 guides the direction and path of airflow, thereby controlling the eccentric vortex center near the inner circle of the impeller and preventing vortex center deviation. When the vortex center is kept near the inner circle, the airflow is more stable, the recirculation flow is reduced, the air supply volume is maintained, and the air supply efficiency is improved, thus avoiding the occurrence of surge. Compared with traditional solutions, which can only modify the duct structure before installation to pre-emptively improve the impact caused by installation or pipelines, this solution allows the position of the eccentric vortex to be controlled by the guide member after the fan system is installed, preventing vortex center deviation, thereby reducing the formation of recirculation flow and improving air supply efficiency.

[0040] The cross-flow impeller 200 is columnar with a certain length of air outlet along its axial side. In one embodiment, the guide member 300 is a component disposed on the cross-flow impeller 200 and not exceeding the axial length of the cross-flow impeller 200. The guide member 300 can be disposed in the middle of the cross-flow impeller 200 and extend a certain length along both ends; or multiple guide members can be disposed at intervals inside the cross-flow impeller 200. In other embodiments, the length of the guide member 300 is the same as the length of the cross-flow impeller 200, extending axially to both ends, thereby better controlling the position of the eccentric vortex.

[0041] Reference Figure 2 The curvature of the guide 300 can be set according to the specific needs of guiding the gas, and is not limited here.

[0042] The principle of the guide element 300 in controlling the eccentric vortex is mainly to change the flow path and velocity distribution of the airflow inside the fan, thereby reducing or eliminating the formation of rotating airflow clusters (vortices) caused by factors such as uneven wind speed and irregular duct shape. Specifically, the guide element 300 has a guide surface 301 and a leeward surface 302. The guide surface 301 faces the rotation center of the cross-flow impeller 200 and is curved in an arc. The guide surface 301 is designed to guide the airflow along a predetermined path, reducing airflow turbulence and vortex generation. When the guide element 300 rotates relative to the cross-flow impeller 200 under drive, part of its guide surface 301 will face the windward side, blocking the airflow blown out from that position, while the leeward surface 302 prevents the eccentric vortex from moving towards the center of the cross-flow impeller 200, further adjusting the airflow distribution and velocity, thereby controlling the formation and development of the eccentric vortex.

[0043] The guide vane 300, through its special shape and position design, can effectively adjust the airflow distribution inside the fan. During fan operation, uneven wind speed and irregular duct shape can easily lead to the formation of eccentric vortices. The guide vane 300 guides the airflow along a more uniform and stable path, reducing the generation and diffusion of vortices. When eccentric vortices interact with the duct wall or other structures, the airflow becomes complex and unstable, leading to circulating flow, increased energy consumption, and reduced airflow. By blocking airflow from a specific location, the guide vane 300 reduces direct contact and interaction between vortices and the wall, thereby reducing the formation and development of circulating flow. By reducing the formation of eccentric vortices and circulating flow, the guide vane 300 improves the overall efficiency of the fan. Stable airflow means less energy is wasted on vortices and circulating flow, and more energy can be used to propel air forward, increasing airflow and reducing energy consumption.

[0044] Specifically, the control method for the air guide 300 is as follows: The static pressure value at the outlet side of the fan system's duct is acquired. Specifically, the static pressure value can be obtained by installing a wind speed sensor at the outlet side of the fan system's duct to monitor the wind speed in real time. Alternatively, a voltage sensing module can be used to monitor voltage changes in real time. A data acquisition module is then responsible for periodically or continuously reading data from the wind speed sensor or voltage module and transmitting it to the control system for processing.

[0045] If the static pressure value is lower than the preset static pressure threshold, the rotational speed of the cross-flow fan 200 will be increased to the preset rotational speed threshold. The control system receives the static pressure value from the data acquisition module and compares it with the preset static pressure threshold. If the wind speed is lower than the preset wind speed threshold, it indicates that the current system resistance has increased. Based on the previous setting, this means that the external static pressure has increased, and the airflow needs to be increased to ensure the outlet wind speed. However, it is also necessary to control the potential problem of eccentric vortex deviation caused by this. At this time, the control system will send a command to the cross-flow fan 200 motor to increase its rotational speed to the preset rotational speed threshold to increase the airflow.

[0046] The guide member is rotated so that at least a portion of its guide surface 301 aligns with the air duct, thereby blocking the airflow blowing from the location of the guide surface 301. After confirming that the rotational speed of the cross-flow impeller 200 has reached a preset threshold, the control system further controls the drive mechanism of the guide member 300 to drive the guide member 300 to rotate. The purpose of rotation is to align at least a portion of the guide surface 301 of the guide member 300 with the air duct, thereby blocking the airflow blowing from that location, thus adjusting the airflow distribution and speed, and reducing the formation of vortices and circulating flow. The control system may need to accurately calculate the optimal rotation angle and position of the guide member 300 based on the current airflow conditions and the shape of the air duct, and adjust it in real time through a feedback mechanism to achieve the best effect.

[0047] When the static pressure value at the air outlet side equals the static pressure threshold, the rotation of the guide component stops. During the rotation of the guide component 300, the control system continuously monitors the wind speed or voltage value at the air outlet side. When the wind speed or voltage value reaches or approaches a preset threshold, the control system sends a command to stop the rotation of the guide component 300, maintaining the current airflow distribution.

[0048] The control system may also include a data analysis module for comprehensively analyzing collected static pressure data, rotational speed data, and guide vane 300 position data to evaluate the overall performance and efficiency of the system. Based on the analysis results, the control system can further optimize the rotation strategy of the guide vane 300, adjust parameters such as rotational speed thresholds or static pressure thresholds, to achieve more efficient and stable operation of the fan system. For example, upon restarting, the guide vane uses its previous position as its initial position. When the external static pressure changes again, the guide vane 300 is readjusted using this initial position according to the aforementioned control method.

[0049] Reference Figure 4Specifically, the air duct has a first air duct wall 111 forming a volute tongue 101 and a second air duct wall 112 corresponding to the first air duct wall 111; the cross-flow impeller 200 is disposed in the air duct assembly 100, and the guide member 300 has an initial position and a blocking position; in the initial position, the leeward surface 302 is close to the first air duct wall 111, and the guide surface and a portion of the surface of the volute tongue 101 constitute an extension of the first air duct wall 111; in the blocking position, the leeward surface 302 is close to the second air duct wall 112, so that at least a portion of the guide surface corresponds to the air outlet side.

[0050] In the initial position, the fan system is within the normal static pressure range after installation. At this time, the guide vane 300 is not activated. In order to avoid the guide vane 300 inside the cross-flow impeller 200 from affecting the air outlet, the guide vane 300 is positioned close to the volute tongue 101 in the initial position, so that the arc-shaped guide surface 301 forms an extension of the volute tongue 101 as much as possible, thereby guiding the air rather than blocking it, and reducing the impact on the air volume.

[0051] Specifically, the line connecting the minimum gap between the cross-flow impeller 200 and the first duct wall 111 to the rotation center of the cross-flow impeller 200 is L. The centerline of the guide member 300 is bisected from the center of the guide surface by M. The angle between L and M is β, where 0° ≤ β < 90°. For example, in the initial position, the angle β is 0°; in the obstruction position, the angle β is greater than 0° and less than 90°; such as 5°, 15°, 20°, 25°, etc. Specifically, the guide member 300 adjusts its angle appropriately according to the external static pressure.

[0052] In the above control methods, it is also possible to adjust the angle according to each wind speed decrease value, for example, 1° corresponds to a wind speed of 1m / s, or other values ​​or units.

[0053] Specifically, in the initial position, the leeward side 302 of the guide element 300 is close to the first duct wall 111, and the guide surface and a portion of the surface of the volute tongue 101 form an extension of the first duct wall 111. This design helps to reduce vortices and backflows formed near the volute tongue 101 during fan startup or low load. The volute tongue is an area within the duct that is prone to vortex generation; the extended design of the guide element 300 guides the airflow to flow more smoothly through this area, reducing energy loss and noise.

[0054] In the obstruction position, the leeward side 302 of the guide vane 300 is close to the second duct wall 112, so that at least a portion of the guide vane corresponds to the air outlet side. This design allows the guide vane 300 to more effectively block airflow from a specific location, thereby allowing for more flexible adjustment of airflow volume and speed. By changing the position and angle of the guide vane 300, precise control of airflow distribution within the duct can be achieved, meeting the needs of different application scenarios.

[0055] Combination Figure 1 and Figure 5 Furthermore, the fan system also includes a flow guide drive 400 disposed on the duct assembly 100. The flow guide drive 400 drives the flow guide 300 to rotate circumferentially relative to the cross-flow impeller 200, thereby switching the flow guide 300 between an initial position and a flow-blocking position. Controlling the rotation of the flow guide 300 is crucial for achieving this switching between the initial and flow-blocking positions. Specifically, the rotation control of the flow guide 300 can be achieved in several ways: In one embodiment, the flow guide 300 can utilize a motor as a power source, transmitting the motor's rotational motion to the flow guide 300 via a transmission device (such as gears, belts, etc.), driving its circumferential rotation relative to the cross-flow impeller 200. This method offers advantages such as high control precision, fast response speed, and large driving force. In another embodiment, the flow guide drive 400 utilizes electromagnetic force as a driving force, generating a magnetic field through a device such as an electromagnet or electromagnetic coil to attract or repel magnetic components on the flow guide 300, thereby driving its rotation. This method offers advantages such as simple structure and convenient control. By designing suitable electromagnets or electromagnetic coils, sufficient electromagnetic force is generated to drive the flow guide 300 to rotate; additionally, magnetic components (such as permanent magnets) are installed on the flow guide 300 to interact with the electromagnetic device. In another embodiment, the flow guide drive 400 utilizes pneumatic or hydraulic pressure as the driving force, converting pneumatic or hydraulic energy into mechanical energy through devices such as cylinders or hydraulic cylinders to drive the flow guide 300 to rotate.

[0056] Furthermore, the fan system also includes a detection device (not shown in the figure) for detecting the static pressure of the fan, a controller (not shown in the figure) electrically connected to the detection device, and a fan drive unit 500 for driving the cross-flow fan wheel 200 to rotate (see reference). Figure 1 and Figure 5 The controller is also electrically connected to both the flow guide drive 400 and the wind turbine drive 500. The controller is used to control the operating states of the wind turbine drive 500 and the flow guide drive 400 based on feedback from the detection device. In one embodiment, the wind turbine drive 500 drives the cross-flow wind turbine 200 via electromagnetic force; in another embodiment, the wind turbine drive 500 is a motor, and the rotational motion of the motor is transmitted to the cross-flow wind turbine 200 via a transmission device (such as gears, belts, etc.).

[0057] Specifically, if the static pressure of the fan fed back by the detection device is greater than or equal to the preset static pressure, the controller controls the impeller drive component 500 to increase the rotational speed of the cross-flow impeller 200 and controls the guide drive component 400 to rotate the guide component 300 to the obstruction position. It should be noted that the higher the static pressure of the fan fed back by the detection device, the larger the β corresponding to the obstruction position to which the guide component 300 is rotated by the controller.

[0058] Combination Figure 2 and Figure 3 To facilitate the installation of the flow guide 300, one end of the flow guide 300 along the axial direction is provided with a first connecting portion 310, and the other end is provided with a second connecting portion 320. Specifically, the first connecting portion 310 is connected to the flow guide drive 400 in a transmission manner, and the second connecting portion 320 is rotatably connected to the cross-flow impeller 200. In this design, the first connecting portion 310 is configured as a convex shaft 311, and the end of the convex shaft 311 near the second connecting portion 320 is also provided with a transmission tooth 312. The convex shaft 311 is rotatably connected to the housing of the flow guide drive 400. The flow guide drive 400 is configured as a servo motor 410, and the drive shaft of the servo motor 410 is provided with a drive tooth 411, which meshes with the transmission tooth 312. Specifically, the second connecting portion 320 is provided with a groove 321 that is rotatably connected to the shaft of the cross-flow impeller 200.

[0059] In other embodiments, the first connecting portion 310 and the second connecting portion 320 may both be grooves and protruding shafts 311, or other matching structures.

[0060] To ensure that the flow guide 300 has sufficient structural strength to withstand the airflow impact and mechanical stress during fan operation, it is appropriate to choose rigid plastics (such as ABS, PC, etc.) or metal materials (such as aluminum alloy, stainless steel, etc.). These materials have high strength and rigidity, which can meet the stability and durability requirements of the flow guide 300 during long-term use.

[0061] In addition, providing a reinforcing structure (such as a reinforcing rib or support frame) on the leeward side 302 of the air guide 300 can further improve its structural strength. The reinforcing structure can effectively disperse and resist the pressure from the airflow, preventing the air guide 300 from deforming or being damaged under the action of high-speed airflow.

[0062] Furthermore, the smooth curved surface design of the guide surface 301 helps reduce friction and resistance of the airflow on the guide member 300, improving the flow channel effect. The smooth curved surface allows the airflow to flow more smoothly over the guide member 300, reducing vortex and backflow phenomena, thereby improving the efficiency and performance of the fan.

[0063] Furthermore, positioning the airflow guide 300 off-center from the rotation center of the cross-flow impeller 200 allows for more precise airflow control. By adjusting the position and angle of the airflow guide 300, the distribution and speed of the airflow can be flexibly adjusted to meet the needs of different application scenarios. Simultaneously, this design also helps reduce airflow vortices and backflow within the duct, improving the overall efficiency of the fan.

[0064] The present invention also proposes an air conditioning system, which includes a fan system. The specific structure of the fan system is as described in the above embodiments. Since the air conditioning system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0065] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A fan system, characterized in that, include: The air duct assembly includes an air outlet duct; A cross-flow fan is located at the inlet of the air outlet duct, and the inner cavity of the cross-flow fan has an air outlet area close to the air outlet duct. as well as A flow guide is rotatably disposed in the inner cavity of the cross-flow impeller. The flow guide has a guide surface, which is arranged in an arc shape convex to the rotation center of the cross-flow impeller. Under drive, the guide member can rotate relative to the cross-flow fan wheel, so that at least a portion of the guide surface is located in the air outlet area.

2. The fan system as described in claim 1, characterized in that, The air outlet duct has a first duct wall forming a volute tongue and a second duct wall corresponding to the first duct wall; the guide member has an initial position and a flow-blocking position; At the initial position, the guide member is located on the side of the volute tongue away from the second air duct wall; At the obstruction position, the guide member is at least partially located on the side of the volute tongue near the second air duct wall, so that at least part of the guide surface is located in the air outlet area.

3. The fan system as described in claim 2, characterized in that, The line connecting the minimum gap between the cross-flow impeller and the first duct wall to the rotation center of the cross-flow impeller is L; the line bisecting the centerline of the guide component from the center of the guide surface is M; and the angle between L and M is β. At the initial position, β = 0°; At the aforementioned flow-blocking position, 0° < β < 90°.

4. The fan system as described in claim 3, characterized in that, The fan system also includes a flow guide drive component disposed on the air duct assembly. The flow guide drive component drives the flow guide component to rotate circumferentially relative to the cross-flow fan wheel, thereby switching the flow guide component between an initial position and a flow blocking position.

5. The fan system as described in claim 4, characterized in that, The fan system also includes a detection device for detecting the static pressure of the fan, a controller electrically connected to the detection device, and a fan wheel drive for driving the cross-flow fan wheel to rotate. The controller is also electrically connected to both the flow guide drive and the fan wheel drive. The controller is used to control the working state of the fan wheel drive and the flow guide drive based on the feedback from the detection device.

6. The fan system as described in claim 5, characterized in that, If the static pressure value of the fan fed back by the detection device is greater than or equal to a preset static pressure threshold, the controller controls the wind turbine drive to increase the rotation speed of the cross-flow wind turbine and controls the flow guide drive to rotate the flow guide to the obstruction position.

7. The fan system as described in claim 6, characterized in that, The greater the static pressure of the fan fed back by the detection device, the greater the β corresponding to the obstruction position to which the flow guide is turned by the controller.

8. The fan system as described in claim 5, characterized in that, The wind turbine drive component is arranged on the same side of the flow guide drive component, and the flow guide drive component is mounted on the wind turbine drive component.

9. The fan system as described in claim 4, characterized in that, The flow guide is provided with a first connecting part at one end along the axial direction and a second connecting part at the other end. The first connecting part is connected to the flow guide drive component, and the second connecting part is rotatably connected to the cross-flow fan wheel.

10. The fan system as described in claim 9, characterized in that, The first connecting part is configured as a convex shaft, and the end of the convex shaft near the second connecting part is also provided with a transmission tooth. The convex shaft is rotatably connected to the housing of the flow guide drive component. The flow guide drive component is configured as a servo motor, and the drive shaft of the servo motor is provided with a drive tooth. The drive tooth meshes with the transmission tooth.

11. The fan system as described in claim 9, characterized in that, The second connecting part is provided with a groove for rotatable connection with the shaft of the cross-flow fan.

12. The fan system as described in claim 1, characterized in that, The two ends of the flow guide extend along the axial direction of the cross-flow impeller to both ends of the cross-flow impeller; and / or, the flow guide is made of rigid plastic or metal; and / or The guide surface is a smooth curved surface; the leeward side is provided with a reinforcing structure; And / or, the flow guide is offset from the rotation center of the cross-flow impeller.

13. An air conditioning system, characterized in that, Includes the wind turbine system as described in any one of claims 1 to 12.

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