Low-noise axial-flow type fire-fighting smoke exhaust fan

Abstract

The invention belongs to the technical field of fire protection and smoke exhaust, and particularly relates to a low-noise axial-flow type fire protection and smoke exhaust fan which comprises a fan shell, a regulation and control assembly and fan blades, each fan blade comprises a water absorption layer, a fan blade shell, a bristle layer and a capillary layer, round openings are evenly formed in the two side walls of each fan blade shell, and the bristle layers are arranged in the round openings. A porous water absorption layer is fixedly installed in the fan blade shell, bristle layers are fixedly installed on the two sides of the water absorption layer, and capillary layers are installed on the two side walls of the fan blade shell. The capillary layer is arranged on the outer wall of the fan blade in an ablation mode, when airflow passes through the capillary layer, the airflow can blow the capillary layer so that the capillary layer can be attached to the outer wall of the fan in the airflow direction, however, bulges can be formed in the bent area of the capillary layer, the flowing airflow can be disturbed through the bulges, and therefore the air flow can be disturbed. And a turbulent boundary layer generated when airflow flows through the surface of the fan blade is destroyed, so that noise generated when the turbulent boundary layer is formed on the surface of the fan blade shell is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of fire smoke exhaust, and in particular relates to a low-noise axial flow fire smoke exhaust fan. Background Art

[0002] Axial flow fire smoke exhaust fans can quickly remove smoke and heat from a building in the event of a fire, maintain air circulation, and reduce the risk of fire spreading; in non-fire situations, axial flow fire smoke exhaust fans can also be used for ventilation of buildings to keep indoor air fresh.

[0003] The fan blades are an indispensable component of every type of fan. Eddy currents will be generated during the rotation of the fan blades, and the eddy currents will produce some noise. The reason why the eddy currents produce noise is, on the one hand, the incoming turbulent flow noise generated when a certain incoming turbulent airflow flows toward the fan blades, and on the other hand, the turbulent boundary layer noise generated when the airflow flows through the surface of the fan blades due to the pulsating turbulent boundary layer.

[0004] In addition, after the fan has been used for a period of time, impurities will stick to the surface of the fan blades, and the rotation resistance of the fan blades will become larger, and the noise will also increase as the rotation resistance of the fan blades increases. Therefore, the outer surface of the fan blades needs to be cleaned after the fan has been used for a period of time. The conventional cleaning method is to remove the fan as a whole for flushing or to direct water to the fan installation location for cleaning, but the cleaning effect is not good. Moreover, the fan is installed at a relatively high position, and it is not convenient to direct water upwards.

[0005] The present invention designs a low-noise axial flow fire smoke exhaust fan to solve the above problems. Summary of the invention

[0006] Based on this, it is necessary to provide a low-noise axial flow fire smoke exhaust fan to address the problems existing in the current lithium carbonate crystallization equipment. The present invention provides a plurality of evenly distributed circular openings on the blade casing of the fan blade. Through the circular openings, part of the airflow can flow from the high-pressure surface of the fan blade to the low-pressure surface of the fan blade, so that the separation point of the fan blade moves downwardly of the flow, thereby reducing the separation area of ​​the fan blade outlet cross section, reducing the vortex intensity and size of the separation area, and reducing the noise accordingly.

[0007] The above purpose is achieved through the following technical solutions: A low-noise axial flow fire smoke exhaust fan, comprising: The fan casing is composed of a cylindrical shell and two bases fixedly installed at the bottom of the shell; a second motor is installed in the shell, the output shaft of the second motor is connected to the first rotating shaft, and a regulating component is installed on the first rotating shaft.

[0008] A regulating component, the regulating component includes a water tank, a fixed sleeve, a transmission sleeve, a fixed arc plate, and an electric push rod, wherein two fixed sleeves are symmetrically fixedly installed in a shell, and a water tank is fixedly installed on the outside of one of the two fixed sleeves; the transmission sleeve is rotatably installed in the two fixed sleeves, and the transmission sleeve is transmission-connected to the first rotating shaft; a plurality of first transmission teeth are fixedly installed evenly circumferentially on the outer circumferential surface of the transmission sleeve, three fixed arc plates are evenly installed circumferentially on the outer sides of the two fixed sleeves, second transmission teeth are fixedly installed on the inner wall of the fixed arc plate, and the second transmission teeth cooperate with the first transmission teeth installed on the transmission sleeve; three electric push rods are installed between the three fixed arc plates and the transmission sleeve, and the three electric push rods correspond to the three fixed arc plates one by one.

[0009] The fan blades are fixedly mounted on the three fixed arc plates in a one-to-one correspondence.

[0010] The fan blade includes a water absorption layer, a fan blade shell, a bristle layer, and a capillary layer, wherein the fan blade shell is fixedly mounted on a corresponding fixed arc plate, and evenly distributed circular openings are opened on both side walls of the fan blade shell. A porous water absorption layer is fixedly mounted in the fan blade shell, and bristle layers are fixedly mounted on both sides of the water absorption layer, and capillary layers are mounted on both side walls of the fan blade shell.

[0011] In one of the embodiments, four water connection holes distributed vertically are opened on the end surface of one side of the water tank, and a solenoid valve is installed at the water connection hole, and a sensing device is provided inside the solenoid valve.

[0012] A water inlet is provided on one side of the fan blade housing close to the water tank.

[0013] A water source control module is fixedly installed on the outside of the shell, and the water source control module has a control chip that can control the switches of three solenoid valves; an external water pipe is installed on the water source control module, and the external water pipe can be connected to an external water source; the water source control module is connected to the water tank through the connecting water pipe.

[0014] When the control fan blade housing rotates until the water inlet on it is aligned with the connecting water hole on the water tank and stops rotating, the sensing device in the corresponding solenoid valve receives the signal and transmits the signal to the corresponding control chip in the water source control module. The control chip controls the corresponding solenoid valve to open, so that the water tank and the fan blade housing are connected through the water inlet and the corresponding connecting water hole.

[0015] In one of the embodiments, a transmission wheel is fixedly mounted on the first rotating shaft, and three transmission blocks are fixedly mounted evenly in a circumferential direction on the outer circumferential surface of the transmission wheel.

[0016] The inner circumferential surface of the transmission sleeve is uniformly provided with three transmission grooves; the three transmission grooves correspond to the three transmission blocks one by one and are connected to each other; the first rotating shaft and the transmission sleeve are connected by transmission through the three transmission grooves and the three transmission blocks.

[0017] In one of the embodiments, the two fixing sleeves are fixedly mounted on the inner side of the shell through two groups of supporting rods.

[0018] Three magnetic limit plates are installed between the three fixed arc plates and one of the two fixed sleeves, and the three magnetic limit plates correspond to the three fixed arc plates one by one; the magnetic limit plates can limit the rotation of the corresponding fixed arc plates.

[0019] In one embodiment, the first rotating shaft passes through two fixing sleeves, and a first bearing is installed between the first rotating shaft and the two fixing sleeves.

[0020] A second bearing is installed between the transmission sleeve and the two fixed sleeves.

[0021] In one of the embodiments, a ring-shaped guide rail is fixedly installed on the outer circumferential surface of the transmission sleeve, and three arc-shaped sliders are evenly slidably installed on the inner circumference of the guide rail, and the three arc-shaped sliders correspond to the three fixed arc plates one by one.

[0022] A fixed plate is fixedly installed on each of the three fixed arc plates, two retractable guide rods are respectively installed between the three fixed plates and the corresponding arc-shaped sliders, and three electric push rods are installed one by one between the three fixed plates and the three arc-shaped sliders.

[0023] The electric push rod can be used to control the corresponding fixed arc plate to slide relative to the transmission sleeve along the axis of the transmission sleeve. Controlling the sliding of the fixed arc plate relative to the transmission sleeve can control whether the second transmission teeth installed on the fixed arc plate match the first transmission teeth installed on the transmission sleeve.

[0024] In one of the embodiments, two fixing rings are fixedly mounted on the outer circumferential surface of the transmission sleeve, and the two fixing rings are located on both sides of the first transmission tooth. The two fixing rings can limit the sliding of the three fixed arc plates.

[0025] In one of the embodiments, a first clutch is installed between the output shaft of the second motor and the first rotating shaft, and the first clutch is fixedly installed in the housing through a first fixed support.

[0026] A first motor is installed in the shell, and the first motor is a servo motor; a transmission assembly is installed between the first motor and the first rotating shaft.

[0027] An electric control switch is fixedly installed on the outer side of the shell, and the electric control switch is connected to the first motor and the second motor through connecting wires.

[0028] In one of the embodiments, a second support plate and a first support plate are fixedly mounted in the shell, the first motor is fixedly mounted on the first support plate, and the second motor is fixedly mounted on the second support plate.

[0029] In one embodiment, the transmission assembly includes a second gear, a second fixed support, a third gear, a second clutch, a third fixed support, and a second rotating shaft, wherein the third gear is fixedly mounted on the output shaft of the first motor, a second clutch is installed between the third gear and the output shaft of the first motor, and the second clutch is fixedly mounted in the housing through the third fixed support; the second rotating shaft is rotatably mounted in the housing through the second fixed support, a second gear is fixedly mounted on one end of the second rotating shaft, and the second gear is meshed with the third gear; the first gear is fixedly mounted on the first rotating shaft, and the first gear is meshed with the second gear.

[0030] Compared with the prior art, the advantages of the present invention are: 1. The present invention provides a plurality of evenly distributed circular openings on the outer shell of the fan blade, through which part of the airflow can flow from the high-pressure surface of the fan blade to the low-pressure surface of the fan blade, so that the separation point of the fan blade moves downward from the flow, thereby reducing the separation area of ​​the fan blade outlet cross section, reducing the vortex intensity and size of the separation area, and reducing noise accordingly; in addition, the water-absorbing layer designed by the present invention is a porous sound-absorbing material, when the sound enters the fan blade outer shell from the circular opening, it will be incident on the surface of the water-absorbing layer, and the vibration generated by the sound incident on the water-absorbing layer when flowing through the water-absorbing layer will cause the air in the small holes or gaps in the water-absorbing layer to move, causing friction with the hole wall, while the air close to the hole wall and the fiber surface is not easy to move due to the influence of the hole wall, and generates viscosity to the sound flowing through, and due to the action of friction and viscosity, part of the sound energy is converted into heat energy, thereby achieving the purpose of noise reduction; secondly, the heat loss caused by the heat exchange between the air in the small hole and the hole wall and the fiber also achieves the purpose of noise reduction.

[0031] 2. The present invention sets a capillary layer on the outer wall of the fan blade by ablation. When the airflow passes through the capillary layer, the airflow will blow the capillary layer so that the capillary layer sticks to the outer wall of the fan along the direction of the airflow. However, a bulge will be formed in the bending area of ​​the capillary layer. The bulge can disrupt the passing airflow and destroy the turbulent boundary layer generated by the airflow passing through the surface of the fan blade, thereby reducing the noise generated by the turbulent boundary layer formed on the outer surface of the fan blade.

[0032] 3. The circular openings on the two side walls of the fan blade housing in the present invention are relatively small. During cleaning, water poured into the fan blade housing from the water tank will form a large flow pressure when flowing through the circular opening, forming a jet phenomenon at the circular opening; the water jetted from the circular opening will impact the outer wall of another fan blade housing adjacent to the fan blade housing, thereby flushing the outer wall surface of the adjacent fan blade housing. In addition, the present invention can ensure that the three outer walls of the fan blade housings installed on the three fixed arc plates can be cleaned by changing the positions of the fixed arc plates that are stationary relative to the transmission sleeve and the two fixed arc plates that rotate relative to the transmission sleeve among the three fixed arc plates and the rotation direction of the two fixed arc plates that rotate relative to the transmission sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall appearance of the components.

[0034] Figure 2 This is a schematic diagram of the distribution of the first motor and the second motor.

[0035] Figure 3 It is a schematic diagram of the internal structure distribution of the overall components.

[0036] Figure 4 This is a schematic diagram of the distribution of regulatory components.

[0037] Figure 5 It is a schematic diagram of the fan casing structure.

[0038] Figure 6 It is a schematic diagram of the transmission component structure.

[0039] Figure 7 This is a schematic diagram of the water tank installation.

[0040] Figure 8 This is a schematic diagram of the fixed sleeve installation.

[0041] Fig. 9 It is a connection diagram of water tank and water source control module.

[0042] Fig.10 It is a schematic diagram of the water tank structure.

[0043] Fig.11 This is a schematic diagram of the fan blade installation.

[0044] Fig.12 This is a schematic diagram of the installation of the magnetic limit plate.

[0045] Fig.13 It is a schematic diagram of the regulatory component structure.

[0046] Fig.14 It is a schematic diagram of the connection between the first rotating shaft and the fixed sleeve.

[0047] Fig.15 This is a schematic diagram of the transmission sleeve installation.

[0048] Fig.16 It is a schematic diagram of the transmission sleeve structure.

[0049] Fig.17 It is a schematic diagram of the cooperation between the transmission sleeve and the fixed arc plate.

[0050] Fig.18 It is a schematic diagram of the fixed arc plate structure.

[0051] Fig.19 This is a schematic diagram of the electric push rod installation.

[0052] Fig. 20 It is a schematic diagram of the fan blade structure.

[0053] Fig.21 It is a schematic diagram of the cleaning principle of the fan blade casing.

[0054] Fig. 22 It is a schematic diagram of the working principle of the capillary layer.

[0055] The reference numbers in the figure are: 1. fan housing; 2. fan blades; 3. electric control switch; 4. external water pipe; 5. water source control module; 6. first motor; 7. second motor; 8. connecting wires; 9. control assembly; 10. transmission assembly; First support plate; 1002, second support plate; 1003, base; 1004, housing; 2001, water inlet; 2002, circular opening; 2003, water absorption layer; 2004, fan blade housing; 2005, brush layer; 2006, capillary layer; 8001, No. 1 fan blade housing; 8002, No. 2 fan blade housing; 8003, No. 3 fan blade housing; 9001, water tank; 9002, fixed sleeve; 9003, support rod; 9004, water connection hole; 9005, water connection pipe; 9006, solenoid valve; 9007, water inlet hole; 9008, fixed arc plate; 9009, magnetic limit plate; 9010, transmission wheel; 9011, transmission sleeve; 9012, transmission block; 9013, first bearing; 9014, second bearing; 9015, guide rail; 9016, fixed ring; 9017, first transmission tooth; 9018, transmission groove; 9019, electric push rod; 9020, second transmission tooth; 9021, fixed plate; 9022, guide rod; 9023, arc slider; 10001, first rotating shaft; 10002, first gear; 10003, first clutch; 10004, first fixed support; 10005, second gear; 10006, second fixed support; 10007, third gear; 10008, second clutch; 10009, third fixed support; 10010, second rotating shaft. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. 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 invention.

[0057] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] like Figure 1 -like Fig.21 As shown, a low-noise axial flow fire smoke exhaust fan comprises a fan housing 1, as shown in FIG. Figure 5 As shown, the fan housing 1 is composed of a cylindrical shell 1004 and two bases 1003 fixedly installed at the bottom of the shell 1004; Figure 2 , Figure 3 , Figure 4 As shown, the housing 1004 is provided with a second motor 7. Figure 6 As shown, the output shaft of the second motor 7 is connected to the first rotating shaft 10001. Figure 6 , Figure 7 As shown, a regulating component 9 is installed on the first rotating shaft 10001; the regulating component 9, as shown in Figure 7 , Fig.13As shown, the control assembly 9 includes a water tank 9001, a fixing sleeve 9002, a transmission sleeve 9011, a fixing arc plate 9008, and an electric push rod 9019. Figure 1 , Figure 4 , Figure 8 As shown, two fixing sleeves 9002 are symmetrically fixedly installed in the housing 1004. Figure 7 As shown, a water tank 9001 is fixedly installed on the outer side of one of the two fixing sleeves 9002; Fig.13 , Fig.15 As shown, the transmission sleeve 9011 is rotatably installed in the two fixed sleeves 9002, and the transmission sleeve 9011 is transmission-connected with the first rotating shaft 10001; Fig.15 As shown, a plurality of first transmission teeth 9017 are evenly and fixedly mounted on the outer circumferential surface of the transmission sleeve 9011. Fig.11 , Fig.12 As shown, three fixed arc plates 9008 are evenly installed on the outer sides of the two fixed sleeves 9002. Fig.19 As shown, the inner wall of the fixed arc plate 9008 is fixedly mounted with a second transmission tooth 9020. Fig.17 , Fig.18 As shown, the second transmission teeth 9020 cooperate with the first transmission teeth 9017 installed on the transmission sleeve 9011; Fig.17 , Fig.18 , Fig.19 As shown, three electric push rods 9019 are installed between the three fixed arc plates 9008 and the transmission sleeve 9011, and the three electric push rods 9019 correspond to the three fixed arc plates 9008 one by one; Fig.11 As shown, the fan blades 2, three fan blades 2 are fixedly installed on three fixed arc plates 9008 one by one; Fig. 20 As shown, the fan blade 2 includes a water absorption layer 2003, a fan blade shell 2004, a bristle layer 2005, and a capillary layer 2006, wherein the fan blade shell 2004 is fixedly mounted on the corresponding fixed arc plate 9008, and evenly distributed circular openings 2002 are opened on both side walls of the fan blade shell 2004, and a porous water absorption layer 2003 is fixedly mounted in the fan blade shell 2004, and bristle layers 2005 are fixedly mounted on both sides of the water absorption layer 2003, and capillary layers 2006 are mounted on both side walls of the fan blade shell 2004.

[0060] Control the second motor 7 to work, the second motor 7 will drive the first rotating shaft 10001 to rotate, and the rotation of the first rotating shaft 10001 will drive the transmission sleeve 9011 to rotate; when the second transmission teeth 9020 installed on the inner walls of the three fixed arc plates 9008 and the first transmission teeth 9017 installed on the outer circumferential surface of the transmission sleeve 9011 are in a meshing state, the rotation of the transmission sleeve 9011 will drive the three fixed arc plates 9008 to rotate, and the rotation of the three fixed arc plates 9008 will drive the three fan blades 2 to rotate, thereby realizing normal smoke exhaust and ventilation of the fan.

[0061] During the rotation of the fan blade 2, eddies will be generated, and the eddies will generate some noise. The reason why the eddies generate noise is, on the one hand, the incoming turbulent flow noise generated when a certain incoming turbulent airflow flows toward the fan blade 2, and on the other hand, the turbulent boundary layer noise generated by the pulsating turbulent boundary layer when the airflow flows through the surface of the fan blade 2. In order to solve this problem, the present invention opens a plurality of evenly distributed circular openings 2002 on the fan blade shell 2004 of the fan blade 2. Through the circular openings 2002, part of the airflow can flow from the high-pressure surface of the fan blade 2 to the low-pressure surface of the fan blade 2, so that the separation point of the fan blade 2 moves downward from the flow, thereby reducing the separation area of ​​the outlet cross section of the fan blade 2, reducing the eddy flow intensity and size of the separation area, and reducing the noise accordingly. In addition, the water-absorbing layer 2003 designed in the present invention is a porous sound-absorbing material. When sound enters the fan blade shell 2004 from the circular opening 2002, it will be incident on the surface of the water-absorbing layer 2003. The sound incident on the water-absorbing layer 2003 will generate vibrations when flowing through the water-absorbing layer 2003, which will cause the air in the small holes or gaps in the water-absorbing layer 2003 to move, causing friction with the hole wall, while the air close to the hole wall and the fiber surface is not easy to move due to the influence of the hole wall, and produces viscosity to the sound flowing through. Due to the action of friction and viscosity, part of the sound energy is converted into heat energy, thereby achieving the purpose of noise reduction; secondly, the heat loss caused by the heat exchange between the air in the small holes and the hole wall and the fiber also achieves the purpose of noise reduction.

[0062] like Fig. 22 As shown, the present invention sets a capillary layer 2006 on the outer wall of the fan blade 2 by ablation. When the airflow passes through the capillary layer 2006, the airflow will blow the capillary layer 2006 so that the capillary layer 2006 sticks to the outer wall of the fan along the airflow direction. However, a bulge will be formed in the bending area of ​​the capillary layer 2006. The bulge can disturb the flowing airflow and destroy the turbulent boundary layer generated by the surface of the fan blade 2, thereby reducing the noise generated by the turbulent boundary layer formed on the surface of the fan blade shell 2004.

[0063] By controlling the operation of the three electric push rods 9019, the three fixed arc plates 9008 can be driven to slide relative to the transmission sleeve 9011, thereby controlling whether the second transmission teeth 9020 installed on the three fixed arc plates 9008 are engaged with the first transmission teeth 9017 installed on the transmission sleeve 9011; when the second transmission teeth 9020 on a fixed arc plate 9008 are in an engaged state with the first transmission teeth 9017 installed on the transmission sleeve 9011, when the transmission sleeve 9011 is driven to rotate, the fixed arc plate 9008 will be driven to rotate through the first transmission teeth 9017 and the corresponding second transmission teeth 9020; the rotation of the fixed arc plate 9008 drives the corresponding fan blade 2 to rotate.

[0064] By controlling one of the three fixed arc plates 9008 to be stationary relative to the transmission sleeve 9011 and the other two fixed arc plates 9008 to rotate relative to the transmission sleeve 9011, the three fixed arc plates 9008 can be gathered together and close to each other; after the three fixed arc plates 9008 are close to each other, the three fan blades 2 installed on them are also close to each other, and at this time, the water in the water tank 9001 is controlled to be poured into the fan blade housing 2004 of the three fan blades 2. After the water enters the fan blade housing 2004, it will be absorbed by the fan blade housing 2004. The water absorbing layer 2003 absorbs water, and the water absorbing layer 2003 expands after absorbing water; the expansion of the water absorbing layer 2003 squeezes the bristle layer 2005 installed thereon, so that a part of the bristle layer 2005 is pressed tightly against the inner wall of the fan blade shell 2004, and the other part of the bristle layer 2005 penetrates into the circular openings 2002 opened on the two side walls of the fan blade shell 2004; when the water absorbing layer 2003 is saturated with water, the water poured into the fan blade shell 2004 will flow out from the circular openings 2002 opened on the two side walls of the fan blade shell 2004, and the water in the flow During the process, the water flow will drive the bristle layer 2005 installed on the water absorption layer 2003 to swing, and during the swinging process of the bristle layer 2005, the inner wall of the fan blade shell 2004 and the circular openings 202 opened on the two side walls of the fan blade shell 2004 can be cleaned; during this process, the water absorption layer 2003 absorbs water and expands to squeeze the bristle layer 2005, so that a part of the bristle layer 2005 is tightly pressed against the inner wall of the fan blade shell 2004, and there is a certain pressure between the bristle layer 2005 and the inner wall of the fan blade shell 2004, and this pressure can ensure that the bristles Layer 2005 has a good cleaning effect on the inner wall of the fan blade shell 2004 during the swinging process; in addition, the circular openings 2002 opened on the two side walls of the fan blade shell 2004 in the present invention are relatively small, and when the water in the fan blade shell 2004 flows through the circular openings 2002, a large flow pressure will be formed, forming a jet phenomenon at the circular openings 2002; the water ejected from the circular openings 2002 will impact the outer wall of another fan blade shell 2004 adjacent to the fan blade shell 2004, thereby flushing the outer wall surface of the adjacent fan blade shell 2004.

[0065] The present invention ensures that the outer walls of the three fan blade housings 2004 installed on the three fixed arc plates 9008 can be cleaned by changing the positions of the fixed arc plates 9008 that are stationary relative to the transmission sleeve 9011 and the two fixed arc plates 9008 that rotate relative to the transmission sleeve 9011, as well as the rotation directions of the two fixed arc plates 9008 that rotate relative to the transmission sleeve 9011; Fig.21 As shown in a in FIG. 1 , three fan blade housings 2004 are set to be fan blade housing No. 1 8001, fan blade housing No. 2 8002 and fan blade housing No. 3 8003; Fig.21 As shown in b, first, the No. 1 blade housing 8001 is made stationary relative to the transmission sleeve 9011, and the No. 2 blade housing 8002 and the No. 3 blade housing 8003 are respectively pressed against the No. 1 blade housing 8001 from both sides relative to the transmission sleeve 9011. At this time, the No. 1 blade housing 8001 is located in the middle, and the No. 2 blade housing 8002 and the No. 3 blade housing 8003 are located on both sides of the No. 1 blade housing 8001. When cleaning, the two outer walls of the No. 1 blade housing 8001, the outer wall of the No. 2 blade housing 8002 close to the No. 1 blade housing 8001, and the outer wall of the No. 3 blade housing 8003 close to the No. 1 blade housing 8001 are cleaned; Fig.21 As shown in c in FIG, the fan blade housing 8002 No. 2 is controlled to be stationary relative to the transmission sleeve 9011, and the fan blade housing 8001 No. 1 and the fan blade housing 8003 No. 3 are respectively pressed against the fan blade housing 8002 No. 2 from both sides relative to the transmission sleeve 9011. At this time, the fan blade housing 8002 No. 2 is located in the middle, and the fan blade housing 8001 No. 1 and the fan blade housing 8003 No. 3 are located on both sides of the fan blade housing 8002. During cleaning, the two outer walls of the fan blade housing 8002 No. 2, the outer wall of the fan blade housing 8001 No. 1 close to the fan blade housing 8002, and the outer wall of the fan blade housing 8003 No. 3 close to the fan blade housing 8002 are cleaned; that is, the outer walls of the three fan blade housings 2004 will all be cleaned in two times.

[0066] In a further embodiment, Fig. 9 , Fig.10 As shown, four water connection holes 9004 distributed vertically are opened on the end surface of one side of the water tank 9001, and a solenoid valve 9006 is installed at the water connection hole 9004, and a sensing device is provided inside the solenoid valve 9006.

[0067] like Fig.12 , Fig. 20 As shown, a water inlet 2001 is formed on one side of the fan housing 2004 close to the water tank 9001 .

[0068] like Figure 1As shown, a water source control module 5 is fixedly installed on the outer side of the housing 1004, and the water source control module 5 has a control chip capable of controlling the switches of the three solenoid valves 9006; an external water pipe 4 is installed on the water source control module 5, and the external water pipe 4 can be connected to an external water source; Fig. 9 As shown, the water source control module 5 is connected to the water tank 9001 via a connecting water pipe 9005 .

[0069] When the control fan blade housing 2004 rotates until the water inlet 2001 thereon is aligned with the connecting water hole 9004 opened on the water tank 9001 and stops rotating, the sensing device in the corresponding solenoid valve 9006 receives the signal and transmits the signal to the corresponding control chip in the water source control module 5. The control chip controls the corresponding solenoid valve 9006 to open, so that the water tank 9001 and the fan blade housing 2004 are connected through the water inlet 2001 and the corresponding connecting water hole 9004.

[0070] In a further embodiment, Fig.14 As shown, a transmission wheel 9010 is fixedly mounted on the first rotating shaft 10001 , and three transmission blocks 9012 are fixedly mounted evenly in a circumferential direction on the outer circumferential surface of the transmission wheel 9010 .

[0071] like Fig.15 , Fig.16 As shown, the inner circumferential surface of the transmission sleeve 9011 is uniformly provided with three transmission grooves 9018; Fig.14 As shown, the three transmission grooves 9018 correspond to the three transmission blocks 9012 one by one and are connected to each other; the first rotating shaft 10001 and the transmission sleeve 9011 are connected by transmission through the three transmission grooves 9018 and the three transmission blocks 9012.

[0072] In a further embodiment, Figure 1 , Figure 4 , Figure 8 As shown, the two fixing sleeves 9002 are fixedly installed on the inner side of the housing 1004 through two groups of supporting rods 9003 .

[0073] like Fig.12 As shown, three magnetic limit plates 9009 are installed between the three fixed arc plates 9008 and one of the two fixed sleeves 9002, and the three magnetic limit plates 9009 correspond to the three fixed arc plates 9008 one by one; the magnetic limit plates 9009 can limit the rotation of the corresponding fixed arc plates 9008.

[0074] In a further embodiment, Fig.14 As shown, the first rotating shaft 10001 passes through two fixing sleeves 9002 , and a first bearing 9013 is installed between the first rotating shaft 10001 and the two fixing sleeves 9002 .

[0075] like Fig.15 As shown, a second bearing 9014 is installed between the transmission sleeve 9011 and the two fixed sleeves 9002 .

[0076] In a further embodiment, Fig.15 , Fig.16 As shown, a ring-shaped guide rail 9015 is fixedly installed on the outer circumferential surface of the transmission sleeve 9011. Fig.17 , Fig.18 , Fig.19 As shown, three arc-shaped sliders 9023 are evenly slidably installed in the inner circumference of the guide rail 9015, and the three arc-shaped sliders 9023 correspond to the three fixed arc plates 9008 one by one.

[0077] like Fig.18 As shown, a fixing plate 9021 is fixedly mounted on each of the three fixing arc plates 9008. Fig.17 , Fig.18 , Fig.19 As shown, two retractable guide rods 9022 are respectively installed between the three fixed plates 9021 and the corresponding arc-shaped sliders 9023, and three electric push rods 9019 are installed between the three fixed plates 9021 and the three arc-shaped sliders 9023 in a one-to-one correspondence.

[0078] The electric push rod 9019 can be used to control the corresponding fixed arc plate 9008 to slide relative to the transmission sleeve 9011 along the axis of the transmission sleeve 9011. Controlling the sliding of the fixed arc plate 9008 relative to the transmission sleeve 9011 can control whether the second transmission tooth 9020 installed on the fixed arc plate 9008 is matched with the first transmission tooth 9017 installed on the transmission sleeve 9011.

[0079] In a further embodiment, Fig.15 As shown, two fixing rings 9016 are fixedly installed on the outer circumferential surface of the transmission sleeve 9011 . The two fixing rings 9016 are located on both sides of the first transmission tooth 9017 . The two fixing rings 9016 can limit the sliding of the three fixed arc plates 9008 .

[0080] In a further embodiment, Fig.11 As shown, a first clutch 10003 is installed between the output shaft of the second motor 7 and the first rotating shaft 10001. Figure 4 As shown, the first clutch 10003 is fixedly mounted in the housing 1004 via a first fixed support 10004 .

[0081] like Figure 2 , Figure 3 , Figure 4 As shown, a first motor 6 is installed in the housing 1004, and the first motor 6 is a servo motor; Figure 6 As shown, a transmission assembly 10 is installed between the first motor 6 and the first rotating shaft 10001 .

[0082] like Figure 1 As shown, an electric control switch 3 is fixedly installed on the outer side of the housing 1004. Figure 1 , Figure 2 As shown, the electric control switch 3 is connected to the first motor 6 and the second motor 7 via connecting wires 8 .

[0083] In a further embodiment, Figure 5 As shown, the second support plate 1002 and the first support plate 1001 are fixedly installed in the housing 1004. Figure 4 As shown, the first motor 6 is fixedly mounted on the first support plate 1001 , and the second motor 7 is fixedly mounted on the second support plate 1002 .

[0084] In a further embodiment, Figure 6 As shown, the transmission assembly 10 includes a second gear 10005, a second fixed support 10006, a third gear 10007, a second clutch 10008, a third fixed support 10009, and a second rotating shaft 10010, wherein the third gear 10007 is fixedly mounted on the output shaft of the first motor 6, and the second clutch 10008 is installed between the third gear 10007 and the output shaft of the first motor 6, as shown in FIG. Figure 4 , Figure 6 As shown, the second clutch 10008 is fixedly mounted in the housing 1004 via the third fixed support 10009; the second rotating shaft 10010 is rotatably mounted in the housing 1004 via the second fixed support 10006, as shown in FIG. Figure 6 As shown, a second gear 10005 is fixedly mounted on one end of the second rotating shaft 10010 , and the second gear 10005 is meshed with the third gear 10007 ; the first gear 10002 is fixedly mounted on the first rotating shaft 10001 , and the first gear 10002 is meshed with the second gear 10005 .

[0085] When the first motor 6 is controlled to work, the first motor 6 will drive the third gear 10007 installed on its output shaft to rotate; when the first clutch 10003 is in a disengaged state and the second clutch 10008 is in a closed state, the rotation of the third gear 10007 will drive the second gear 10005 to rotate, the rotation of the second gear 10005 will drive the first gear 10002 to rotate, the rotation of the first gear 10002 will drive the first shaft 10001 to rotate; the rotation of the first shaft 10001 will drive the transmission wheel 9010 to rotate, and the transmission wheel 9010 will rotate through the three transmission slots 9018 The cooperation with the three transmission blocks 9012 drives the transmission sleeve 9011 to rotate; when the second transmission teeth 9020 installed on the inner wall of one of the three fixed arc plates 9008 or two of the three fixed arc plates 9008 or three of the three fixed arc plates 9008 are in a meshing state with the first transmission teeth 9017 installed on the outer circumferential surface of the transmission sleeve 9011, the rotation of the transmission sleeve 9011 will drive the fixed arc plate 9008 meshing with it through the first transmission teeth 9017 and the second transmission teeth 9020 to rotate, and the rotation of the fixed arc plate 9008 will drive the corresponding fan blade 2 to rotate.

[0086] When the second clutch 10008 is in a disengaged state and the first clutch 10003 is in a closed state, the second motor 7 is controlled to work, and the second motor 7 will drive the first rotating shaft 10001 to rotate. The rotation of the first rotating shaft 10001 drives the transmission wheel 9010 to rotate, and the rotation of the transmission wheel 9010 drives the transmission sleeve 9011 to rotate through the cooperation of the three transmission grooves 9018 and the three transmission blocks 9012; when the second transmission teeth 9020 installed on the inner walls of the three fixed arc plates 9008 and the first transmission teeth 9017 installed on the outer circumferential surface of the transmission sleeve 9011 are in a meshing state, the rotation of the transmission sleeve 9011 will drive the three fixed arc plates 9008 to rotate, and the rotation of the three fixed arc plates 9008 will drive the three fan blades 2 to rotate, thereby realizing normal smoke exhaust and ventilation of the fan.

[0087] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A low-noise axial flow fire smoke exhaust fan, characterized in that: It includes The fan housing is composed of a cylindrical shell and two bases fixedly installed at the bottom of the shell; a second motor is installed in the shell, the output shaft of the second motor is connected to the first rotating shaft, and a regulating component is installed on the first rotating shaft; A regulating component, the regulating component comprises a water tank, a fixed sleeve, a transmission sleeve, a fixed arc plate, and an electric push rod, wherein two fixed sleeves are symmetrically fixedly installed in the housing, and a water tank is fixedly installed on the outside of one of the two fixed sleeves; the transmission sleeve is rotatably installed in the two fixed sleeves, and the transmission sleeve is transmission-connected with the first rotating shaft; a plurality of first transmission teeth are fixedly installed uniformly on the outer circumferential surface of the transmission sleeve, three fixed arc plates are uniformly installed on the outer circumferential sides of the two fixed sleeves, and second transmission teeth are fixedly installed on the inner wall of the fixed arc plate, and the second transmission teeth cooperate with the first transmission teeth installed on the transmission sleeve; three electric push rods are installed between the three fixed arc plates and the transmission sleeve, and the three electric push rods correspond to the three fixed arc plates one by one; Fan blades, three fan blades are fixedly installed on three fixed arc plates one by one; The fan blade includes a water absorption layer, a fan blade shell, a bristle layer, and a capillary layer, wherein the fan blade shell is fixedly mounted on a corresponding fixed arc plate, and evenly distributed circular openings are opened on both side walls of the fan blade shell. A porous water absorption layer is fixedly mounted in the fan blade shell, and bristle layers are fixedly mounted on both sides of the water absorption layer, and capillary layers are mounted on both side walls of the fan blade shell.

2. A low-noise axial flow fire smoke exhaust fan according to claim 1, characterized in that: Four water connection holes distributed up and down are opened on the end surface of one side of the water tank, and a solenoid valve is installed at the water connection hole, and a sensing device is provided inside the solenoid valve; A water inlet is provided on one side of the fan housing close to the water tank; A water source control module is fixedly installed on the outer side of the housing, and a control chip capable of controlling the switches of three solenoid valves is arranged in the water source control module; an external water pipe is installed on the water source control module, and the external water pipe can be connected to an external water source; the water source control module is connected to the water tank through the connecting water pipe; When the control fan blade housing rotates until the water inlet on it is aligned with the connecting water hole on the water tank and stops rotating, the sensing device in the corresponding solenoid valve receives the signal and transmits the signal to the corresponding control chip in the water source control module. The control chip controls the corresponding solenoid valve to open, so that the water tank and the fan blade housing are connected through the water inlet and the corresponding connecting water hole.

3. A low-noise axial flow fire smoke exhaust fan according to claim 1, characterized in that: A transmission wheel is fixedly mounted on the first rotating shaft, and three transmission blocks are evenly fixedly mounted on the outer circumferential surface of the transmission wheel; The inner circumferential surface of the transmission sleeve is uniformly provided with three transmission grooves; the three transmission grooves correspond to the three transmission blocks one by one and are connected to each other; the first rotating shaft and the transmission sleeve are connected by transmission through the three transmission grooves and the three transmission blocks.

4. A low-noise axial flow fire smoke exhaust fan according to claim 1, characterized in that: The two fixing sleeves are fixedly mounted on the inner side of the housing through two sets of support rods; Three magnetic limit plates are installed between the three fixed arc plates and one of the two fixed sleeves, and the three magnetic limit plates correspond to the three fixed arc plates one by one; the magnetic limit plates can limit the rotation of the corresponding fixed arc plates.

5. A low-noise axial flow fire smoke exhaust fan according to claim 1, characterized in that: The first rotating shaft passes through two fixing sleeves, and a first bearing is installed between the first rotating shaft and the two fixing sleeves; A second bearing is installed between the transmission sleeve and the two fixed sleeves.

6. A low-noise axial flow fire smoke exhaust fan according to claim 4, characterized in that: A ring-shaped guide rail is fixedly installed on the outer circumferential surface of the transmission sleeve, and three arc-shaped sliders are evenly slidably installed on the inner circumference of the guide rail, and the three arc-shaped sliders correspond to the three fixed arc plates one by one; A fixed plate is fixedly installed on each of the three fixed arc plates, two retractable guide rods are respectively installed between the three fixed plates and the corresponding arc-shaped sliders, and three electric push rods are correspondingly installed between the three fixed plates and the three arc-shaped sliders; The electric push rod can be used to control the corresponding fixed arc plate to slide relative to the transmission sleeve along the axis of the transmission sleeve. Controlling the sliding of the fixed arc plate relative to the transmission sleeve can control whether the second transmission teeth installed on the fixed arc plate match the first transmission teeth installed on the transmission sleeve.

7. A low-noise axial flow fire smoke exhaust fan according to claim 6, characterized in that: Two fixing rings are fixedly mounted on the outer circumferential surface of the transmission sleeve. The two fixing rings are located on both sides of the first transmission tooth. The two fixing rings can limit the sliding of the three fixed arc plates.

8. The low-noise axial flow fire smoke exhaust fan according to claim 1, characterized in that: A first clutch is installed between the output shaft of the second motor and the first rotating shaft, and the first clutch is fixedly installed in the housing through a first fixed support; A first motor is installed in the housing, and the first motor is a servo motor; a transmission assembly is installed between the first motor and the first rotating shaft; An electric control switch is fixedly installed on the outer side of the shell, and the electric control switch is connected to the first motor and the second motor through connecting wires.

9. A low-noise axial flow fire smoke exhaust fan according to claim 8, characterized in that: A second support plate and a first support plate are fixedly mounted in the shell, the first motor is fixedly mounted on the first support plate, and the second motor is fixedly mounted on the second support plate.

10. A low-noise axial flow fire smoke exhaust fan according to claim 9, characterized in that: The transmission assembly includes a second gear, a second fixed support, a third gear, a second clutch, a third fixed support, and a second rotating shaft, wherein the third gear is fixedly mounted on the output shaft of the first motor, a second clutch is installed between the third gear and the output shaft of the first motor, and the second clutch is fixedly mounted in the housing through the third fixed support; the second rotating shaft is rotatably mounted in the housing through the second fixed support, a second gear is fixedly mounted on one end of the second rotating shaft, and the second gear is meshed with the third gear; the first gear is fixedly mounted on the first rotating shaft, and the first gear is meshed with the second gear.

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