Diffuser and fan

Abstract

The present invention belongs to the field of centrifugal ventilation equipment, and in particular, relates to a diffuser and a fan. The diffuser comprises: a guide seat; a blade, one end of which is rotatably and slidably connected to the guide seat; wherein a plurality of blades are provided, each blade is arranged in a circle on the guide seat and forms a blade ring together, and an air outlet connected to the inside of the blade ring is formed between any two adjacent blades; the inner diameter of the blade ring is variable to adjust the opening of each air outlet. The diffuser of the present invention can improve the adaptability of the diffuser under different working conditions.

Description

Technical Field

[0001] The invention belongs to the field of centrifugal ventilation equipment, and in particular relates to a diffuser and a fan. Background Art

[0002] A centrifugal fan is a dust removal and ventilation device that obtains high-speed airflow through the mechanical movement of an impeller or other structure. The high-speed airflow diffuses from the center to the surroundings and is diffused by the circumferentially arranged blades on the diffuser to form a high-pressure airflow. The high-pressure airflow is then output through the two adjacent blades and the air outlet between them. Among them, the diffuser is one of the important components of the centrifugal fan. The opening size of the air outlet and the radial distance between the air outlet and the wind source need to be adjusted accordingly according to different working conditions; when the gas flow rate is large, it is necessary to expand the opening of the air outlet and increase the radial distance between the air outlet and the wind source to reduce the fan noise; when the gas flow rate is small, it is necessary to reduce the opening of the air outlet and shorten the radial distance between the air outlet and the wind source to improve work efficiency. At present, in common diffusers, the blades are fixed or can only be adjusted to a limited position.

[0003] However, when the blades are fixed or have a limited adjustment range, the size of the air outlet cannot be adjusted or is limited in adjustment, and the distance between the air outlet and the wind source is also difficult to adjust, thereby making it difficult to fully meet the needs of different working conditions. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a diffuser, aiming to solve the problem of how to improve the adaptability of the diffuser under different working conditions.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In one aspect, a diffuser is provided, comprising:

[0007] Guide seat;

[0008] A blade, one end of which is rotatably and slidably connected to the guide seat;

[0009] There are multiple blades, each blade is arranged in a circle on the guide seat and together forms a blade ring, and an air outlet connected to the inside of the blade ring is formed between any two adjacent blades; the inner diameter of the blade ring is variable to adjust the opening of each air outlet.

[0010] In one embodiment, guide grooves are provided on the guide seat at positions corresponding to each of the blades; each of the guide grooves is radially arranged relative to the center position of the blade ring; each of the guide grooves has a blade rotatably and slidably installed therein, and each of the blades can be moved to a position where its inlet angle matches the wind direction.

[0011] In one embodiment, the guide groove is an arc-shaped groove.

[0012] In one embodiment, the blade includes a blade body and a rotating shaft connected to one end of the blade body; the rotating shaft is at least partially rotatable and slidably installed in the guide groove, the body is exposed in the guide groove, and the air outlet is formed between two adjacent blade bodies.

[0013] In one embodiment, the diffuser further comprises an end cover arranged opposite to the guide seat, the end cover is provided with an air inlet hole connected to each of the air outlets; the sheet body is located between the end cover and the guide seat and has a predetermined distance from the end cover.

[0014] In one embodiment, the diffuser further comprises a base, the base is provided with a mounting groove adapted to the guide seat, the guide seat is received in the mounting groove, and each of the sheet bodies is exposed in the mounting groove.

[0015] In one embodiment, the guide groove passes through the guide seat, the free end of the rotating shaft is penetrated by the corresponding guide groove and is connected with a sliding block; a sliding groove is provided at the bottom of the mounting groove, and the sliding block slides against the bottom of the sliding groove.

[0016] In one embodiment, the diffuser further comprises a limit assembly for limiting the movement range of the blades, and the limit assemblies are arranged at intervals along the circumference of the blade ring and correspond one-to-one to the blades.

[0017] In one embodiment, the diffuser further comprises an elastic member having elastic restoring force, the elastic member is disposed between any two adjacent blades, and two ends of the elastic member are respectively connected to the corresponding two blades.

[0018] On the other hand, a fan is also provided, comprising the diffuser.

[0019] The beneficial effects of the present application are: each blade is rotatably connected to the guide seat, and two adjacent blades can change the opening and direction of the air outlet according to airflows of different sizes and directions; each blade is also slidably connected to the guide seat and can translate along the radial direction of the blade ring, so that the spacing between two adjacent blades and the opening and direction of the air outlet can be adjusted to a greater extent; in addition, the spacing between the air outlet and the center of the circle of the blade ring can also be changed accordingly. When the airflow is small, the force of the airflow on the blade is small. At this time, the blade maintains its initial position or slides a small distance and rotates a small angle under the push of a small airflow, so that the air outlet is maintained in a state of small opening and a position close to the center of the circle of the blade ring, so that the gas can quickly flow out of the diffuser through the air outlet, thereby improving the boosting efficiency of the diffuser for small flow airflow. When the airflow is large, the force of the gas on the blades is large. At this time, the sliding distance and rotation angle of the blades under the push of the airflow also increase accordingly, so that the opening of the air outlet increases and is located farther away from the center of the blade ring, thereby increasing the buffer distance of the airflow flowing out of the air outlet and reducing the collision between the airflow and the blades, thereby reducing the noise of the diffuser during use; the opening of the air outlet and its relative position to the center of the blade ring can be adjusted according to the amount of airflow. In summary, this application solves the technical problem of how to improve the adaptability of the diffuser under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the exploded structure of a diffuser provided in one embodiment of the present application;

[0022] Figure 2 for Figure 1 The assembly structure diagram of the diffuser shown;

[0023] Figure 3 for Figure 2 A cross-sectional view of the diffuser at A shown;

[0024] Figure 4 for Figure 3 A partial enlarged view of the diffuser B shown;

[0025] Figure 5 for Figure 2 A schematic diagram of the relative positions of the base and blades of the diffuser shown;

[0026] Figure 6 for Figure 2 Schematic diagram of the relative positions of the end cover and blades of the diffuser shown;

[0027] Figure 7 A schematic diagram of the structure of a blade provided in one embodiment of the present application.

[0028] Among them, the figure marks in the figure are: 100, diffuser; 10, guide seat; 11, guide groove; 20, blade; 21, blade body; 22, rotating shaft; 23, slider; 231, slot; 24, air outlet; 25, axial gap; 30, end cover; 31, matching groove; 32, air inlet hole; 40, limit assembly; 41, first limit part; 42, second limit part; 50, base; 51, mounting groove; 52, slide groove; 53, air outlet hole; 60, synchronization mechanism; 61, elastic member. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present application.

[0030] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] See also Figure 1 , Figure 2 and Figure 5, the embodiment of the present application provides a diffuser 100, including a guide seat 10 and a plurality of blades 20 arranged at intervals; wherein, one end of any blade 20 is rotatably and slidably connected to the guide seat 10, each blade 20 is arranged in a circular pattern on the guide seat 10 and forms a blade ring together, and an air outlet 24 connected to the inside of the blade ring is formed between any two adjacent blades 20; the inside of the blade ring can be used to set a wind source, and airflow is generated at the wind source, and the airflow can flow out from the air outlet 24; the inner diameter of the blade ring can be changed under the action of an external force to adjust the opening of each air outlet 24 to meet the needs of airflows of different sizes. wherein, each blade 20 translates a predetermined distance along the radial direction of the blade ring on the guide seat 10, and at the same time, the size of the inner diameter of the blade ring can be adjusted by rotating a predetermined angle; each blade 20 can rotate and translate under the impetus of the airflow, or it can be connected to a driving mechanism and rotate and translate under the action of the driving mechanism.

[0032] See also Figure 1 , Figure 2 and Figure 5 It can be understood that each blade 20 is rotatably connected to the guide seat 10, and two adjacent blades 20 can change the opening and direction of the air outlet 24 according to airflows of different sizes and directions; each blade 20 is also slidably connected to the guide seat 10, and can translate along the radial direction of the blade ring, so that the spacing between two adjacent blades 20 and the opening and direction of the air outlet 24 can be adjusted to a greater extent; in addition, the spacing between the air outlet 24 and the center of the circle of the blade ring can also be changed accordingly. When the airflow is small, the force of the airflow on the blade 20 is small. At this time, the blade 20 maintains the initial position or slides a small distance and rotates a small angle under the push of the small airflow, so that the air outlet 24 is maintained in a state of small opening and a position close to the center of the circle of the blade ring, so that the gas can quickly flow out of the diffuser 100 through the air outlet 24, thereby improving the boosting efficiency of the diffuser 100 for small flow airflow. When the airflow is large, the force exerted by the gas on the blade 20 is large. At this time, the sliding distance and the rotation angle of the blade 20 under the push of the airflow also increase accordingly, so that the opening of the air outlet 24 increases and is located farther away from the center of the blade ring, thereby increasing the buffer distance of the airflow flowing out through the air outlet 24 and reducing the collision between the airflow and the blade 20, thereby reducing the noise of the diffuser 100 during use; the opening of the air outlet 24 and the relative position to the center of the blade ring can be adjusted according to the size of the airflow. In summary, this application solves the technical problem of how to improve the adaptability of the diffuser 100 under different working conditions.

[0033] It can be understood that the opening of the air outlet 24 can be the distance between corresponding positions on two adjacent blades 20, or the angle between corresponding positions on two adjacent blades 20 or the angle of tangents; wherein the corresponding positions on two adjacent blades 20 refer to positions that are consistent with the center of the blade ring.

[0034] See also Figures 1 to 3 Optionally, the guide seat 10 is disc-shaped, and the blade ring is coaxially arranged with the guide seat 10. It can be understood that the disc-shaped guide seat 10 is more convenient to cooperate with the impeller and other structures to facilitate the expansion of the airflow formed at the impeller outlet; specifically, the impeller, the blade ring and the guide seat 10 are coaxially arranged in sequence, and the blade ring is located at the periphery of the impeller, so that the airflow under the centrifugal action of the impeller can be uniformly expanded and released through the outlet 24 at the corresponding position.

[0035] See also Figure 7 Optionally, the surface of the blade 20 is a smooth curved surface to facilitate smooth passage of airflow.

[0036] See also Figure 1 , Figure 2 and Figure 5 Optionally, according to the initial rated operating conditions, the initial parameters related to the size and position of the blade ring and the blade 20 are calculated, and then the structure of the blade 20 is designed according to the initial parameters and the connection position of the blade 20 and the guide seat 10 is determined. The initial parameters include: the initial inner diameter of the blade ring, the initial outer diameter of the blade ring, the position of the air outlet 24 relative to the center of the blade ring, and the opening angle of the air outlet 24; further, according to the required initial inner diameter, initial outer diameter of the blade ring and the opening and position of the air outlet 24, the length of the blade 20, the installation position of the blade 20, and the spacing and angle between two adjacent blades 20 are determined; in addition, according to the flow rate and direction of the airflow under the rated operating conditions, the curvature of the surface of the blade 20 and the direction, opening and position of the air outlet 24 are further determined. Optionally, according to the different operating conditions applied by the diffuser 100, the rotation range and sliding range of the blade 20 are determined.

[0037] See also Figure 1 , Figure 4 and Figure 5 Optionally, guide grooves 11 are provided at positions corresponding to each blade 20 on the guide seat 10, and each guide groove 11 extends radially relative to the center of the blade ring; blades 20 are rotatably and slidably installed in each guide groove 11, and each blade 20 can be moved to a position where its inlet angle matches the wind direction. Among them, the inlet angle of the blade 20 refers to the angle between the tangent at the end point of the blade 20 close to the center of the blade ring and the tangent of the blade ring at this point; the wind direction refers to the flow direction of the airflow from the wind source inside the blade ring to the corresponding air outlet 24. It can be understood that the groove length of the guide groove 11 extends in the same plane. It can be understood that the guide groove 11 has an end relatively close to the center of the blade ring and an end relatively far away from the center of the blade ring, and the blade 20 can slide between the two ends of the guide groove 11 to adjust the inner diameter of the blade ring and the opening and radial position of the air outlet 24.

[0038] See also Figure 1 , Figure 4 and Figure 5 It can be understood that the blade 20 is installed in the guide groove 11 by rotation and sliding; the blade 20 can rotate and translate along the length of the guide groove 11 at the same time under the impetus of the airflow, so as to change the distance between two adjacent blades 20 and change the direction, opening and relative position of the air outlet 24 to the center of the blade ring. It can be understood that while the airflow pushes the blade 20 to slide, it applies a torque to the corresponding surface of the blade 20, thereby driving the blade 20 to rotate. When the airflow is small, the force of the gas on the blade 20 is small. At this time, the blade 20 maintains the initial position or slides a small distance and rotates a small angle under the impetus of the small airflow, so that the air outlet 24 between the two adjacent blades 20 is maintained at a position close to the center of the blade ring and has a small opening angle. At this time, the spacing width of each position between the two adjacent blades 20 is also small, so as to facilitate the guidance and expansion of the small flow gas. When the airflow is large, the force of the gas on the blade 20 is relatively large. At this time, the blade 20 can slide a large distance and rotate a large angle under the push of the large airflow, so that each air outlet 24 moves away from the center of the blade ring and has a large opening angle. At this time, the width between each position between two adjacent blades 20 is large, thereby expanding the flow space of the airflow and reducing the collision between the gas and entities such as the blade 20, thereby reducing the noise of the diffuser 100 during use. It can be understood that in this embodiment, the direction, opening angle and relative position of the air outlet 24 all depend on the size of the airflow to a certain extent, and can be automatically adjusted according to the size of the airflow; thereby, the working efficiency of the diffuser 100 can be improved under small airflow conditions, and the noise generated by the diffuser 100 can be reduced under large airflow conditions.

[0039] See also Figure 1 and Figure 5 Optionally, each guide groove 11 is opened at an edge of the guide seat 10 at an equal interval. It can be understood that the guide grooves 11 arranged at an equal interval can make the airflow evenly distributed to each air outlet 24, thereby improving the uniformity of the pressure diffusion; opening the guide grooves 11 at the edge of the guide seat 10 can expand the space inside the blade ring to install the impeller or other upstream structures that generate airflow.

[0040] See also Figure 1 and Figure 5 Optionally, in this embodiment, the guide groove 11 is an arc-shaped groove, that is, the extension path of the guide groove 11 is arc-shaped.

[0041] It is understandable that when the extension path of the guide groove 11 is in an arc shape, the connecting line of its two ends is not parallel to the tangent of any edge of the blade ring, that is, the two ends of the guide groove 11 are at different radial positions on the blade ring. It is understandable that when the extension path of the guide groove 11 is in an arc shape, when a certain amount of airflow pushes the blade 20 to slide along the guide groove 11 to a corresponding position, the groove walls on both sides of the guide groove 11 at that location can limit the blade 20 perpendicular to the tangent direction of the groove wall, thereby helping to keep the blade 20 in a stable position matching the airflow size, thereby stably expanding the airflow.

[0042] Alternatively, the extension path of the guide groove 11 is in a straight line. It is understood that when the extension path of the guide groove 11 is set in a straight line, the guide groove 11 is not parallel to the tangent of any edge of the blade ring, that is, the two ends of the guide groove 11 are at different radial positions on the blade ring. It is understood that the blade 20 is subject to less resistance under the push of the airflow, and slides more smoothly, which is convenient for the blade 20 to automatically adjust its own radial position.

[0043] It is understandable that the extension path of the guide groove 11 is arc-shaped or linear, which can make the sliding blade 20 slide to different radial positions to change the inner diameter of the leaf ring. Please refer to Figure and Figure. Optionally, when the blade 20 is at one end of the guide groove 11 close to the center of the leaf ring, it can rotate to a position where the radial projections of two adjacent blades 20 overlap. It is understandable that under the action of a small airflow, the blade 20 is at a position where the inner diameter of the leaf ring is smaller. At this time, the overlapping section space of the two adjacent blades 20 is narrow, which has a better guiding effect on the airflow, and can guide the airflow inside the leaf ring to each air outlet 24, and evenly flow out through each air outlet 24.

[0044] Optionally, a bearing or a rotating shaft is connected to the end of the blade 20 , and the bearing or the rotating shaft is rotatably installed in the guide groove 11 to realize the rotation of the blade 20 in the guide groove 11 .

[0045] See also Figure 1 , Figure 5 and Figure 7 Optionally, in this embodiment, the blade 20 includes a blade body 21 and a rotating shaft 22 connected to one end of the blade body 21; the rotating shaft 22 is at least partially rotatably installed in the guide groove 11, the blade body 21 is exposed from the guide groove 11, and an air outlet 24 is formed between two adjacent blade bodies 21.

[0046] It can be understood that the circumferential side wall of the rotating shaft 22 is adapted to the guide groove 11 so that the rotating shaft 22 can rotate and slide in the guide groove 11; an air outlet 24 for air to flow out of the interior of the blade ring is formed between two adjacent sheet bodies 21, and each sheet body 21 is connected to the end of its corresponding rotating shaft 22 and exposed to the guide groove 11, so that the sheet body 21 can rotate with the rotating shaft 22 and / or slide along the guide groove 11, thereby making the direction, opening, radial position of the air outlet 24 and the distance between two adjacent blades 20 at various locations can be changed according to the amount of airflow to realize the automatic adjustment function of the diffuser 100.

[0047] See also Figure 1 and Figure 5 Optionally, the guide groove 11 is a waist-shaped groove with arc-shaped ends. It is understandable that the two ends of the waist-shaped groove are arc-shaped, which makes it easier for the connection position of the blade 20 to rotate here. Optionally, two annular flanges are convexly provided at corresponding positions on the circumferential side surface of the rotating shaft 22, and the two annular flanges are respectively exposed at the notches at both ends of the guide groove 11 to limit the axial position of the rotating shaft 22 in the guide groove 11.

[0048] See also Figure 1 , Figure 4 and Figure 5 Optionally, in this embodiment, the diffuser 100 further includes an end cover 30 disposed opposite to the guide seat 10, and the end cover 30 is provided with an air inlet through hole 32 communicating with each air outlet 24; the blade body 21 is located between the end cover 30 and the guide seat 10, and has a predetermined distance from the end cover 30. It can be understood that the end cover 30 can be used to encapsulate the guide seat 10 and the blade 20 on the one hand, so as to prevent the blade 20 from being damaged or causing damage during the rotation process; on the other hand, the internal space between the end cover 30 and the blade ring can be used to install an impeller or other airflow generating structure to realize the application of the diffuser 100.

[0049] See also Figure 1 , Figure 4 and Figure 5 It can be understood that by providing a predetermined distance between the end cover 30 and the sheet body 21, the sheet body 21 can be prevented from being interfered with by the end cover 30 during rotation and translation and affecting the smoothness of movement, thereby ensuring that the automatic adjustment function of the diffuser 100 is fully realized.

[0050] See also Figure 3 and Figure 4 Optionally, in this embodiment, there is an axial gap 25 with a predetermined distance of 0.05 mm to 0.2 mm between the blade body 21 and the end cover 30. Optionally, in this embodiment, there is an axial gap 25 of 0.1 mm between the blade body 21 and the end cover 30 so that the blade 20 can rotate and translate freely and maintain the compactness of the diffuser 100 structure.

[0051] Optionally, a plurality of mating grooves 31 are spaced apart on the end cover 30 , and the mating grooves 31 are arranged one-to-one corresponding to the guide grooves 11 , and their shapes and sizes are consistent with the guide grooves 11 ; the rotating shaft 22 passes through the other end of the sheet body 21 , and is slidably and rotatably installed in the mating groove 31 .

[0052] It can be understood that the matching groove 31 can further limit the axial position of the rotating shaft 22 on the one hand, and can also guide the movement of the blade 20 together with the guide groove 11 on the other hand, thereby increasing the stability of the movement of the blade 20.

[0053] See also Figure 1 and Figure 6 Optionally, the peripheral side wall of the end cover 30 is cylindrical, the guide seat 10 is disc-shaped, the end cover 30 and the guide seat 10 are coaxially arranged, and the air inlet hole 32 is opened at the axis of the end cover 30.

[0054] It can be understood that the space between the end cover 30 and the guide seat 10 can be used to install rotating structures such as impellers. Setting the end cover 30 and the guide seat 10 coaxially makes it easier to position structures such as impellers; setting the air inlet at the center of the end cover 30 helps to make the airflow flow evenly radially to the entrances of each airway.

[0055] See also Figure 1 and Figure 6 Optionally, the diffuser 100 further includes a limit assembly 40 for limiting the range of movement of the blade 20. The limit assembly 40 is arranged at intervals along the circumference of the blade ring and corresponds to the blade 20 one by one. It is understandable that the limit assembly 40 can be arranged at a corresponding position on the guide seat 10, or can be arranged on the end cover 30. It is understandable that the limit assembly 40 can be used to limit the translation and rotation range of the blade 20, and the two ends of the guide groove 11 can be used to limit the translation range of the rotating shaft 22; the limit assembly 40 cooperates with the guide groove 11 to prevent the blade 20 from rotating too much and affecting the realization of its own function or interfering with the normal operation of other structures, and to prevent the internal structure of the diffuser 100 from being damaged due to collision.

[0056] See also Figure 1 and Figure 6Optionally, the limiting assembly 40 includes a first limiting portion 41 and a second limiting portion 42, the first limiting portion 41 and the second limiting portion 42 are respectively located at different radial positions on the blade ring, and the blade 20 has a first limit position state and a second limit position state respectively abutting against the first limiting portion 41 and the second limiting portion 42; when in the first limit position state, the distance between two adjacent blades 20 is at a minimum state, the opening of the air outlet 24 is the minimum and is at a radial position closest to the center of the blade ring; when in the second limit position state, the distance between two adjacent blades 20 is at a maximum state, the opening of the air outlet 24 is the maximum and is at a radial position farthest from the center of the blade ring. It can be understood that the first limiting portion 41 can also prevent the two adjacent blades 20 from being completely fitted together and causing the air outlet 24 to be blocked, and the function of the diffuser 100 cannot be realized; the second limiting portion 42 can prevent the blade 20 from continuing to collide with the shell outward and causing damage to the internal structure of the diffuser 100.

[0057] See also Figure 1 and Figure 5 Optionally, in this embodiment, the diffuser 100 further includes a base 50, on which a mounting groove 51 adapted to the guide seat 10 is provided, the guide seat 10 is accommodated in the mounting groove 51, and each blade body 21 is exposed in the mounting groove 51. It can be understood that the base 50 can be used to encapsulate the blades 20 and the guide seat 10, and the mounting groove 51 can provide support for the guide seat 10 so that the blades 20 and the guide seat 10 can work stably.

[0058] See also Figure 1 , Figure 2 and Figure 5 Optionally, the peripheral side surface of the base 50 is cylindrical, and the guide seat 10, the end cover 30 and the base 50 are coaxially arranged.

[0059] See also Figure 1 and Figure 4 Optionally, the blade 20 further includes a slider 23; the guide groove 11 passes through the guide seat 10; the rotating shaft 22 extends out of the corresponding notch of the guide groove 11 away from the blade body 21, and is connected with the slider 23; the bottom of the installation groove 51 is provided with a slide groove 52, and the slider 23 slides against the bottom of the slide groove 52. It can be understood that, on the one hand, the bottom of the slide groove 52 has a supporting and axial limiting effect on the slider 23 and the rotating shaft 22 located above the slider 23, which can improve the stability of the rotation and translation of the blade 20; on the other hand, the slider 23 slides against the bottom of the slide groove 52, which is convenient for ensuring that each rotating shaft 22 rotates and translates in the same plane.

[0060] Optionally, the slider 23 is connected to the rotating shaft 22 by bonding, plugging or threading.

[0061] See also Figure 1 , Figure 3 and Figure 4 Optionally, a slot 231 is provided on the slider 23, and the free end of the shaft 22 is adapted to the shape and size of the slot 231; the free end of the shaft 22 passes through the guide groove 11 and is inserted into the slot 231. Optionally, the corresponding part of the shaft 22 is inserted into the slot 231 and bonded to the wall of the slot 231.

[0062] See also Figure 1 Optionally, one side of the slot 231 on the slider 23 for inserting the shaft 22 is a flat surface, and the other side is an arc-shaped slot; the corresponding part of the shaft 22 is adapted thereto. It can be understood that in this embodiment, the insertion direction of the shaft 22 can be uniquely determined by combining the flat surface and the arc-shaped surface.

[0063] See also Figure 1 and Figure 4 Optionally, the slider 23 is sleeved on the free end of the shaft 22 through the slot 231, and the upper end of the slider 23 abuts the guide seat 10. It can be understood that in this embodiment, the slider 23 is fixedly connected to the shaft 22, and its upper end abuts the guide seat 10, thereby effectively limiting the upward movement of the shaft 22 along the axis.

[0064] Optionally, the slide groove 52 is arranged in a circular ring shape, and multiple sliders 23 slide against the same slide groove 52 at the same time and move in the same slide groove 52; or, the slide groove 52 and the slider 23 are arranged in a one-to-one correspondence, and each slider 23 moves in its corresponding slide groove 52 respectively.

[0065] See also Figure 3 and Figure 4 Optionally, in this embodiment, the diffuser 100 further includes a synchronization mechanism 60, which includes a plurality of elastic members 61 with elastic restoring force; an elastic member 61 is provided between any two adjacent blades 20, and both ends of the elastic member 61 are respectively connected to the two blades 20 so that the blades 20 move synchronously.

[0066] It can be understood that the two ends of the elastic member 61 are directly or indirectly connected to the two blades 20, so that the blade 20 that is first affected by the airflow to rotate and / or move can pull the adjacent blade 20 to move synchronously; each blade 20 performs the synchronous movement, so that each air outlet 24 can maintain a basically consistent shape, opening and direction, thereby enabling the diffuser 100 to output airflow evenly in the circumferential direction.

[0067] See also Figure 1 Optionally, in this embodiment, the elastic member 61 is a spring. Optionally, in this embodiment, the elastic member 61 is a tension spring.

[0068] See also Figure 1Optionally, the axes of the elastic members 61 are in the same plane. It can be understood that in this embodiment, the diffuser 100 is placed horizontally so that the planes defined by the blade ring and the guide seat 10 are parallel to the horizontal position; the elastic members 61 are connected to the same position on each blade 20, which can effectively ensure that the movement of each blade 20 is in the same plane without axial movement.

[0069] Optionally, two ends of the elastic member 61 are respectively connected to two adjacent rotating shafts 22 .

[0070] See also Figure 1 Optionally, two ends of the elastic member 61 are respectively connected to two adjacent sliders 23 .

[0071] It is understandable that when the airflow flows from the inside of the blade ring to the blade 20, a force is generated on the blade 20, causing the blade 20 to rotate and translate until the inlet angle of the blade 20 matches the airflow direction. When the working conditions of the diffuser 100 change, the final stable angle and radial position of the blade 20 will also change accordingly, and the synchronous movement of all blades 20 will be achieved through the synchronization mechanism 60 to ensure the working efficiency of the diffuser 100 and reduce the noise to a better expected range.

[0072] See also Figures 1 to 3 The present invention further proposes a fan, which includes a diffuser 100. The specific structure of the diffuser 100 refers to the above embodiment. Since the present invention adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0073] See also Figure 1 , Figure 3 and Figure 5 Optionally, an air outlet hole 53 connected to the air outlet 24 is provided at the edge of the base 50. It is understandable that the airflow can flow from the inside of the blade ring through the air outlet 24 and the air outlet hole 53 in sequence and flow to the outside or other downstream structures.

[0074] Optionally, a line connecting one end of the air outlet hole 53 close to the center of the blade ring and one end away from the center of the blade ring is arranged at a predetermined angle to the radial direction of the blade ring.

[0075] See also Figure 1 , Figure 3 and Figure 5 Optionally, a plurality of air outlet holes 53 are spaced apart along the edge of the base 50 , and each air outlet hole 53 is connected to the air outlet 24 at a corresponding position.

[0076] Optionally, the air outlet holes 53 are arranged radially relative to the center of the blade ring.

[0077] See also Figure 1 , Figure 3 and Figure 5 Optionally, the air outlet holes 53 and the air outlets 24 are arranged in a one-to-one correspondence.

[0078] See also Figure 5 Optionally, when the blade 20 slides to the end of the guide groove 11 away from the center of the blade ring and rotates to the maximum angle, the direction of the blade 20 and the air outlet hole 53 are roughly parallel.

[0079] Optionally, the fan further includes an impeller rotatably mounted between the end cover 30 and the guide seat 10 and coaxially arranged with the end cover 30. It is understood that the airflow generated by the rotation of the impeller flows around the impeller and flows out through the air outlet 24 between the two blades 20 on the diffuser 100.

[0080] The above are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A diffuser, characterized in that: include: Guide seat; A blade, one end of which is rotatably and slidably connected to the guide seat; There are a plurality of blades, each of which is arranged in a circle on the guide seat and together forms a blade ring, and an air outlet connected to the inside of the blade ring is formed between any two adjacent blades; the inner diameter of the blade ring is variable to adjust the opening of each air outlet; The guide seat is provided with guide grooves at positions corresponding to the blades; the guide grooves are arranged radially relative to the center of the blade ring; the blades are rotatably and slidably mounted in the guide grooves, and each blade can be moved to a position where its inlet angle matches the wind direction; the blades can slide in the guide grooves, which means that the blades can slide to different radial positions in the guide grooves; The blade includes a blade body and a rotating shaft connected to one end of the blade body; the rotating shaft is at least partially rotatable and slidably installed in the guide groove, the blade body is exposed from the guide groove, and the air outlet is formed between two adjacent blade bodies; the blade is installed on the guide seat only through the rotating shaft.

2. The diffuser according to claim 1, characterized in that The guide groove is an arc groove.

3. The diffuser according to claim 1, characterized in that The diffuser further comprises an end cover arranged opposite to the guide seat, the end cover is provided with an air inlet through hole communicating with each of the air outlets; the sheet body is located between the end cover and the guide seat, and has a predetermined distance from the end cover.

4. The diffuser according to claim 1, wherein: The diffuser further comprises a base, the base is provided with a mounting groove adapted to the guide seat, the guide seat is accommodated in the mounting groove, and each of the sheet bodies is exposed in the mounting groove.

5. The diffuser according to claim 4, characterized in that The guide groove passes through the guide seat, and the free end of the rotating shaft is penetrated by the corresponding guide groove and connected with a sliding block; the bottom of the mounting groove is provided with a sliding groove, and the sliding block slides against the bottom of the sliding groove.

6. The diffuser according to any one of claims 1 to 5, characterized in that: The diffuser further comprises a limiting assembly for limiting the moving range of the blades. The limiting assemblies are arranged at intervals along the circumference of the blade ring and correspond to the blades one by one.

7. The diffuser according to any one of claims 1 to 5, characterized in that: The diffuser further comprises an elastic member having elastic restoring force, wherein the elastic member is disposed between any two adjacent blades, and two ends of the elastic member are respectively connected to the corresponding two blades.

8. A fan, characterized in that: Comprising the diffuser according to any one of claims 1 to 7.

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