Fan of indirect evaporation water chilling unit

Abstract

The invention belongs to the technical field of fans, and particularly relates to a fan of an indirect evaporation water chilling unit, which comprises an air cylinder, the lower end of the air cylinder is fixedly connected with a flow collecting cylinder, the upper end of the air cylinder is fixedly connected with a diffusion cylinder, and a fan main body is fixedly arranged in the air cylinder; the device further comprises a limiting mounting mechanism, an extruding and clamping mechanism, two sets of self-adjusting sealing connecting mechanisms, a water retaining mechanism, an auxiliary knocking mechanism, a wind speed regulating and controlling mechanism, a wind speed synchronous feedback adjusting mechanism and a PLC. The clamping and fixing force of the fan body can be automatically adjusted based on the rotating speed needed by the fan, the larger the rotating speed of the fan body is, the larger the clamping and fixing force of the fan body is, the connection sealing performance can be automatically adjusted based on the rotating speed change of the fan body, the higher the rotating speed of the fan body is, the higher the sealing strength is, and the sealing performance is better. And water drops brought out in the working process of the fan body can be effectively separated.

Description

Technical Field

[0001] The invention belongs to the technical field of fans, and in particular relates to a fan of an indirect evaporative water chiller. Background Art

[0002] An indirect evaporative chiller is a very common air conditioning cooling system. It uses water as a circulating coolant, absorbs heat from the system and discharges it into the atmosphere to reduce the water temperature. In an indirect evaporative chiller, the fan plays a vital role. It is mainly used to promote the flow of air, help take away the water vapor and heat generated during the evaporation process, and maintain the heat exchange efficiency inside the unit. For example, a fan for an indirect evaporative chiller is proposed in the patent with patent announcement number CN204175671U.

[0003] The load of the objects served by the indirect evaporative chiller (such as air conditioning systems in buildings, industrial cooling equipment, etc.) changes dynamically. When the load is low, such as when there are few people in an office building at night and the equipment utilization rate is low, the cooling demand is reduced. At this time, the fan can reduce the speed and reduce the air flow to match the cooling capacity of the unit with the actual demand and reduce energy consumption. During daytime office hours or busy industrial production periods, the load increases and more cooling is required. The fan must increase the speed to ensure sufficient air flow to meet the cooling demand. Therefore, the working power of the fan is not fixed. The higher the fan speed, the faster the air flows in the impeller, and the flow state becomes more complicated. At high speeds, the airflow is prone to unstable phenomena such as turbulence and eddy currents. These unstable airflows will produce uneven forces on the impeller and fan casing. This force will act on the impeller and fan mechanism and cause greater vibrations. The vibrations will cause noise and excessive damage to the fan components, affecting the quality of use. When the fan speed increases, the air pressure in the duct will change. The pressure at the fan outlet will increase, forming a positive pressure zone, while a relatively negative pressure zone will be formed at the inlet. This increase in pressure difference will challenge the sealing of the connection between the duct and the collecting tube and diffuser. If the sealing performance of the connection is not good, air will leak from the sealing gap under the action of positive pressure, affecting the sealing protection performance of the entire mechanism. Summary of the invention

[0004] The object of the present invention is to provide a fan for an indirect evaporative water chiller in view of the above problems.

[0005] To achieve the above object, the present invention adopts the following technical scheme: a fan of an indirect evaporative water chiller, comprising a wind tube, a collector tube is fixedly connected to the lower end of the wind tube, a diffuser tube is fixedly connected to the upper end of the wind tube, a fan body is fixedly installed in the wind tube, and further comprising: The limit installation mechanism is fixedly installed between the air duct and the fan body; The extrusion clamping mechanism is installed outside the air duct and is used to provide pressure to the limit installation mechanism; Two sets of self-adjusting sealing connection mechanisms are respectively arranged between the wind tube and the collecting tube and between the wind tube and the diffuser tube; A water retaining mechanism is fixedly mounted on the inner wall of the diffusion cylinder; An auxiliary knocking mechanism is fixedly mounted on the inner wall of the diffusion tube and is located on the upper side of the water retaining mechanism; A wind speed control mechanism is electrically connected to the fan body; A wind speed synchronous feedback regulating mechanism is fixedly mounted on the wind speed regulating mechanism and is transmission-connected to the wind speed regulating mechanism; The PLC controller is fixedly installed outside the wind speed regulating mechanism and is electrically connected to the extrusion clamping mechanism, the self-adjusting sealing connection mechanism, the wind speed regulating mechanism and the wind speed synchronous feedback regulating mechanism respectively.

[0006] In the above-mentioned fan of an indirect evaporative chiller, the limit mounting mechanism includes a mounting frame arranged in the air duct, the inner wall of the mounting frame is fixedly connected to the same positioning frame through a plurality of mounting rods, the positioning frame is fixedly sleeved outside the fan body, the side wall of the air duct is sleeved with a plurality of limit rods, the side wall of the mounting frame is provided with a plurality of limit holes connected to the limit rod sleeves, and the limit rod and the air duct are detachably fixedly connected by bolts.

[0007] In the above-mentioned fan of an indirect evaporative chiller, the extrusion and clamping mechanism includes a U-shaped fixing plate fixedly connected to the outer wall of the wind tube, the U-shaped fixing plate and the opposite side of the wind tube are rotatably connected with the same clamping screw, the outer wall of the U-shaped fixing plate is fixedly provided with a stepping motor for driving the clamping screw to rotate, the rod wall of the clamping screw is threadedly sleeved with a pushing plate, the side wall of the pushing plate is symmetrically fixedly connected with a plurality of pushing rods, the ends of the plurality of pushing rods away from the pushing plate extend through the wind tube and are fixedly connected with the same rubber pressure block, and the inner wall of the wind tube is provided with an embedding groove for placing the rubber pressure block.

[0008] In the above-mentioned fan of an indirect evaporative chiller, the self-adjusting sealing connection mechanism includes a hollow sealing frame, the upper and lower ends of the hollow sealing frame are fixedly connected with hollow rubber sealing rings, the two ends of the wind tube, the upper end of the collecting tube and the lower end of the diffusion tube are provided with sealing slots that are sealed and plugged with the hollow rubber sealing ring, the hollow sealing frame and the hollow rubber sealing ring are connected, the outer wall of the hollow sealing frame is fixedly connected with a U-shaped connecting plate, the outer walls of the wind tube, the collecting tube and the diffusion tube are fixedly connected with a locking plate that is arranged in contact with the U-shaped connecting plate, and the U-shaped connecting plate and the locking plate are fixedly connected. The U-shaped connecting plate is fixedly connected by bolts, and a compressed gas cylinder is fixedly sleeved on the side wall of the U-shaped connecting plate. A piston plate is provided in the sealing sleeve of the compressed gas cylinder. A plurality of anti-dropping rods are symmetrically and fixedly connected to the rear side of the piston plate. One end of the anti-dropping rod away from the piston plate passes through the rear end of the compressed gas cylinder and is fixedly connected with the anti-dropping plate. A return spring sleeved on the outside of the anti-dropping rod is fixedly connected between the anti-dropping plate and the compressed gas cylinder. A force-bearing permanent magnetic plate is fixedly connected to the side wall of the piston plate. A force-bearing electromagnetic plate arranged opposite to the force-bearing permanent magnetic plate is fixedly installed on the inner wall of the compressed gas cylinder. The compressed gas cylinder and the hollow sealing frame are connected.

[0009] In the above-mentioned fan of an indirect evaporative chiller, the water retaining mechanism includes a water retaining plate assembly fixedly mounted on the inner wall of the diffuser tube, a water diversion cone head is fixedly connected to the center position of the lower end of the water retaining plate assembly, the lower end of the water retaining plate assembly is also fixedly connected to a water collecting cylinder mounted outside the water diversion cone head, the cylinder wall of the water collecting cylinder is fixedly connected to a drain pipe, and one end of the drain pipe away from the water collecting cylinder passes through and extends out of the diffuser tube.

[0010] In the above-mentioned fan of an indirect evaporative chiller, the auxiliary knocking mechanism includes a support frame fixedly mounted on the inner wall of the diffusion cylinder, a wind wheel is rotatably connected to the support frame through a rotating shaft, and one end of the rotating shaft extends through the support frame and is fixedly connected to a cam, a horizontal plate is fixedly connected to the outer wall of the lower end of the support frame, a plurality of reciprocating rods arranged side by side are movably inserted on the surface of the horizontal plate, a plurality of reciprocating rods are fixedly connected to the upper ends of the plurality of reciprocating rods with the same L-shaped structure, a plurality of reciprocating springs sleeved on the outside of the reciprocating rods are fixedly connected to the lower end of the knocking rod and the upper end of the horizontal plate, and a knocking ball located on the upper side of the water diversion cone head is fixedly connected to the lower end of the knocking rod.

[0011] In the above-mentioned fan of an indirect evaporative chiller, the wind speed control mechanism includes a frequency converter, a frequency conversion knob is installed on the frequency converter, a servo motor is fixedly installed on the upper end of the frequency converter, a transmission shaft is fixedly connected to the center of the upper end of the frequency conversion knob, and the output end of the servo motor and the transmission shaft are connected through a sprocket assembly.

[0012] In the above-mentioned fan of an indirect evaporative chiller, the wind speed synchronous feedback adjustment mechanism includes a speed-increasing gearbox and a feedback shell fixedly mounted on the upper end of the frequency converter, the input end of the speed-increasing gearbox is transmission-connected to the output end of the servo motor through a bevel gear assembly, a synchronous screw is rotatably connected in the feedback shell, one end of the synchronous screw extends through the feedback shell and is fixedly connected to the output end of the speed-increasing gearbox, a synchronous seat is threadedly sleeved on the rod wall of the synchronous screw, a feedback resistor rod arranged in parallel with the synchronous screw is fixedly mounted on the lower side of the inner wall of the feedback shell, a feedback conductive contact electrically contacting the feedback resistor rod is fixedly connected at the lower end of the synchronous seat, a pressure monitoring plate is fixedly mounted on one side of the upper end of the synchronous seat, a self-rotating screw arranged in parallel with the synchronous screw is rotatably connected on the upper side of the inner wall of the feedback shell, a driving motor for driving the self-rotating screw to rotate is fixedly mounted on the outer wall of the feedback shell, a movable plate is threadedly sleeved on the rod wall of the self-rotating screw, and the movable plate is arranged opposite to the pressure monitoring plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting the wind tube, limit installation mechanism, extrusion clamping mechanism, wind speed control mechanism, and wind speed synchronous feedback adjustment mechanism, the clamping and fixing force of the fan body can be automatically adjusted based on the required rotation speed of the fan. The greater the rotation speed of the fan body, the greater the clamping and fixing force of the fan body. Because when the fan speed increases, the vibration amplitude and frequency generated by the fan will increase. By increasing the clamping force of the fan, the connection stability between the fan and the wind tube can be enhanced, the connection between the fan and the wind tube can be made tighter, the displacement of the fan in the vibration direction can be limited, and the transmission of the fan vibration can be reduced to a certain extent, thereby reducing noise and preventing component damage caused by excessive vibration. At the same time, it also avoids the situation that the fan body uses too large a clamping and fixing force at a lower rotation speed, which will make the connection between the fan and the wind tube too rigid and unable to effectively buffer normal small vibrations, thereby generating unnecessary noise and vibration.

[0014] 2. By setting up a self-adjusting sealing connection mechanism and a wind speed synchronous feedback adjustment mechanism, the connection sealing between the wind duct, the collecting tube and the diffuser tube is better, and the connection sealing performance can be automatically adjusted based on the speed change of the fan body. The higher the speed of the fan body, the higher the sealing strength. When the fan speed increases, the air pressure in the wind duct will change, the pressure at the fan outlet will increase, forming a positive pressure area, and a relatively negative pressure area will be formed at the inlet. This increase in pressure difference will challenge the connection sealing between the wind duct and the collecting tube and diffuser tube. If the sealing performance of the connection part is not good, under the action of positive pressure, air will leak from the sealing gap, affecting the sealing protection performance of the entire mechanism, thereby ensuring the sealing effect while avoiding the problem of damage to the sealing material caused by excessive compression.

[0015] 3. The water baffle mechanism and auxiliary knocking mechanism are set up to effectively separate the water droplets brought out by the fan main body during operation. The water baffle assembly is used to change the direction of the airflow so that the water droplets are separated from the air under the action of inertia. The water baffle assembly is composed of multiple curved blades or folded plates. When the airflow carrying water droplets passes through the water baffle, the air can smoothly bypass the water baffle and continue to move forward. The water droplets will hit the surface of the water baffle due to their large inertia, and then gather under the action of gravity and flow down along the water baffle, and finally be collected and discharged, thereby avoiding the discharge of water droplets with the air, which will not only affect the indoor environmental humidity, but also cause damage to the equipment downstream of the unit, such as causing short circuit problems in electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a front view cross-sectional structural schematic diagram of the present invention; Figure 3 yes Figure 2 Schematic diagram of the three-dimensional structure of the main body of the blower; Figure 4 It is a cross-sectional structural schematic diagram of the position limiting installation mechanism and the extrusion clamping mechanism of the present invention; Figure 5 It is a schematic cross-sectional view of the self-adjusting sealing connection mechanism of the present invention; Figure 6 It is a structural schematic diagram of the water retaining mechanism of the present invention; Figure 7 is a schematic cross-sectional structural diagram of the auxiliary striking mechanism of the present invention; Figure 8 It is a structural schematic diagram of the wind speed control mechanism of the present invention; Fig. 9 It is a schematic cross-sectional structural diagram of the wind speed synchronous feedback regulating mechanism of the present invention.

[0017] In the figure: 1 air duct, 2 limit installation mechanism, 21 installation frame, 22 installation rod, 23 positioning frame, 24 limit rod, 25 limit hole, 3 extrusion clamping mechanism, 31 U-shaped fixing plate, 32 clamping screw, 33 stepping motor, 34 extrusion push plate, 35 extrusion push rod, 36 rubber pressure block, 37 embedding groove, 4 self-adjusting sealing connection mechanism, 41 hollow sealing frame, 42 hollow rubber sealing ring, 43 sealing slot, 44 U-shaped connecting plate, 45 locking plate, 46 compressed air cylinder, 47 piston plate, 48 anti-slip rod, 49 anti-slip plate, 410 reset spring, 411 force permanent magnet plate, 412 force electromagnetic plate, 5 water retaining mechanism, 51 water retaining plate assembly, 52 water diversion cone head, 53 water collecting Cylinder, 54 drainage pipe, 6 auxiliary knocking mechanism, 61 support frame, 62 wind wheel, 63 cam, 64 cross plate, 65 reciprocating rod, 66 knocking rod, 67 reciprocating spring, 68 knocking ball, 7 wind speed control mechanism, 71 frequency converter, 72 frequency conversion knob, 73 servo motor, 74 transmission shaft, 75 sprocket assembly, 8 wind speed synchronous feedback adjustment mechanism, 81 speed increasing gear box, 82 feedback shell, 83 bevel gear assembly, 84 synchronous screw, 85 synchronous seat, 86 feedback resistor rod, 87 feedback conductive contact, 88 pressure monitoring board, 89 self-rotating screw, 810 drive motor, 811 moving plate, 9 collecting cylinder, 10 diffusion cylinder, 11 fan body, 12 PLC controller. Implementation

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] like Figure 1-Figure 9 As shown, a fan of an indirect evaporative chiller comprises a fan duct 1, a collector duct 9 is fixedly connected to the lower end of the fan duct 1, a diffuser duct 10 is fixedly connected to the upper end of the fan duct 1, a fan body 11 is fixedly installed in the fan duct 1, and further comprises: The limit installation mechanism 2 is fixedly installed between the wind duct 1 and the fan body 11. The limit installation mechanism 2 includes a mounting frame 21 arranged in the wind duct 1. The inner wall of the mounting frame 21 is fixedly connected to the same positioning frame 23 through multiple mounting rods 22. The positioning frame 23 is fixedly sleeved outside the fan body 11. Multiple limit rods 24 are inserted into the side wall of the wind duct 1. Multiple limit holes 25 connected to the limit rods 24 are opened on the side wall of the mounting frame 21. The limit rods 24 are detachably fixedly connected to the wind duct 1 by bolts, which can achieve a stable installation of the fan body 11.

[0020] The squeezing and clamping mechanism 3 is installed outside the wind tube 1 and is used to provide a pressing force to the limit installation mechanism 2. The squeezing and clamping mechanism 3 includes a U-shaped fixing plate 31 fixedly connected to the outer wall of the wind tube 1. The U-shaped fixing plate 31 and the opposite side of the wind tube 1 are rotatably connected with the same clamping screw 32. The outer wall of the U-shaped fixing plate 31 is fixedly installed with a stepping motor 33 for driving the clamping screw 32 to rotate. The rod wall of the clamping screw 32 is threadedly sleeved with a squeezing and pushing plate 34. The side wall of the squeezing and pushing plate 34 is symmetrically fixedly connected with a plurality of squeezing and pushing rods 35. The ends of the plurality of squeezing and pushing rods 35 away from the squeezing and pushing plate 34 extend into the wind tube 1 and are fixedly connected with the same rubber pressing block 36. The inner wall of the wind tube 1 is provided with an embedding groove 37 for placing the rubber pressing block 36. The clamping and fixing force of the fan body 11 can be automatically adjusted based on the different rotation speeds of the fan body 11 to avoid the problem of excessive vibration of the fan body 11 causing large noise and damage to the parts of the fan body 11.

[0021] Two sets of self-adjusting sealing connection mechanisms 4 are respectively arranged between the wind tube 1 and the collecting tube 9 and between the wind tube 1 and the diffuser 10. The self-adjusting sealing connection mechanism 4 includes a hollow sealing frame 41. The upper and lower ends of the hollow sealing frame 41 are fixedly connected with hollow rubber sealing rings 42. Both ends of the wind tube 1, the upper end of the collecting tube 9 and the lower end of the diffuser 10 are provided with sealing slots 43 that are sealed and plugged with the hollow rubber sealing ring 42. The hollow sealing frame 41 and the hollow rubber sealing ring 42 are connected. The outer wall of the hollow sealing frame 41 is fixedly connected with a U-shaped connecting plate 44. The outer walls of the wind tube 1, the collecting tube 9 and the diffuser 10 are fixedly connected with a locking plate 45 that is arranged in contact with the U-shaped connecting plate 44. The U-shaped connecting plate 44 and the locking plate 45 are fixedly connected by bolts. The side wall of the U-shaped connecting plate 44 is fixed with a sleeve There is a compressed air cylinder 46, and a piston plate 47 is provided in the sealing sleeve of the compressed air cylinder 46. A plurality of anti-slip rods 48 are symmetrically fixedly connected to the rear side of the piston plate 47. The end of the anti-slip rod 48 away from the piston plate 47 passes through the rear end of the compressed air cylinder 46 and is fixedly connected to an anti-slip plate 49. A return spring 410 sleeved on the anti-slip rod 48 is fixedly connected between the anti-slip plate 49 and the compressed air cylinder 46. A force-bearing permanent magnet plate 411 is fixedly connected to the side wall of the piston plate 47. A force-applying electromagnetic plate 412 arranged opposite to the force-bearing permanent magnet plate 411 is fixedly installed on the inner wall of the compressed air cylinder 46. The compressed air cylinder 46 and the hollow sealing frame 41 are connected to each other, so that the wind cylinder 1, the collecting cylinder 9 and the diffuser cylinder 10 can be stably sealed and connected together, and the sealing strength can be automatically adjusted based on the different rotation speeds of the fan body 11.

[0022] The water retaining mechanism 5 is fixedly mounted on the inner wall of the diffuser tube 10, and includes a water retaining plate assembly 51 fixedly mounted on the inner wall of the diffuser tube 10, a water diverting cone head 52 is fixedly connected to the center position of the lower end of the water retaining plate assembly 51, and the lower end of the water retaining plate assembly 51 is also fixedly connected to a water collecting cylinder 53 sleeved on the outside of the water diverting cone head 52, and the cylinder wall of the water collecting cylinder 53 is fixedly connected to a drain pipe 54, and one end of the drain pipe 54 away from the water collecting cylinder 53 extends through the outside of the diffuser tube 10, so as to effectively separate the water droplets brought out by the fan body 11 during operation.

[0023] The auxiliary knocking mechanism 6 is fixedly mounted on the inner wall of the diffusion tube 10 and is located on the upper side of the water retaining mechanism 5. The auxiliary knocking mechanism 6 includes a support frame 61 fixedly mounted on the inner wall of the diffusion tube 10. A wind wheel 62 is rotatably connected to the support frame 61 through a rotating shaft, and one end of the rotating shaft extends through the support frame 61 and is fixedly connected to a cam 63. A horizontal plate 64 is fixedly connected to the outer wall of the lower end of the support frame 61. A plurality of reciprocating rods 65 arranged side by side are movably inserted on the surface of the horizontal plate 64. The upper ends of the plurality of reciprocating rods 65 are fixedly connected to knocking rods 66 with the same L-shaped structure. The lower end of the knocking rod 66 and the upper end of the horizontal plate 64 are fixedly connected to a plurality of reciprocating springs 67 mounted outside the reciprocating rod 65. The lower end of the knocking rod 66 is fixedly connected to a knocking ball 68 located on the upper side of the water diversion cone head 52.

[0024] The wind speed control mechanism 7 is electrically connected to the fan body 11, and includes a frequency converter 71, on which a frequency conversion knob 72 is mounted, a servo motor 73 is fixedly mounted at the upper end of the frequency converter 71, a transmission shaft 74 is fixedly connected at the center of the upper end of the frequency conversion knob 72, and the output end of the servo motor 73 and the transmission shaft 74 are connected through a sprocket assembly 75.

[0025] The wind speed synchronous feedback adjustment mechanism 8 is fixedly mounted on the wind speed control mechanism 7 and is transmission-connected with the wind speed control mechanism 7. The wind speed synchronous feedback adjustment mechanism 8 includes a speed-increasing gearbox 81 and a feedback housing 82 fixedly mounted on the upper end of the frequency converter 71. The input end of the speed-increasing gearbox 81 is transmission-connected with the output end of the servo motor 73 through a bevel gear assembly 83. A synchronous screw 84 is rotationally connected in the feedback housing 82. One end of the synchronous screw 84 extends through the feedback housing 82 and is fixedly connected with the output end of the speed-increasing gearbox 81. A synchronous seat 85 is threadedly sleeved on the rod wall of the synchronous screw 84. A feedback resistor rod 86 arranged parallel to the synchronous screw 84 is fixedly installed on the lower side of the inner wall of the shell 82, a feedback conductive contact 87 electrically contacting the feedback resistor rod 86 is fixedly connected to the lower end of the synchronous seat 85, a pressure monitoring plate 88 is fixedly installed on one side of the upper end of the synchronous seat 85, a self-rotating screw 89 arranged parallel to the synchronous screw 84 is rotatably connected to the upper side of the inner wall of the feedback shell 82, a driving motor 810 for driving the self-rotating screw 89 to rotate is fixedly installed on the outer wall of the feedback shell 82, a movable plate 811 is threadedly sleeved on the rod wall of the self-rotating screw 89, and the movable plate 811 is arranged opposite to the pressure monitoring plate 88.

[0026] The PLC controller 12 is fixedly installed outside the wind speed regulating mechanism 7, and is electrically connected to the extrusion clamping mechanism 3, the self-adjusting sealing connection mechanism 4, the wind speed regulating mechanism 7 and the wind speed synchronous feedback regulating mechanism 8 respectively.

[0027] The operating principle of the present invention is described as follows: the fan body 11 is placed in the wind tube 1, and the mounting frame 21 is in contact with the wind tube 1. The mounting frame 21 fixes the fan body 11 through the mounting rod 22 and the positioning frame 23, and then the limiting rod 24 is inserted into the limiting hole 25 on the side wall of the mounting frame 21, and the limiting rod 24 is fixed to achieve fixed installation of the wind tube 1 and the fan body 11; The wind tube 1, the collector tube 9 and the diffuser tube 10 are sealed and installed by a self-adjusting sealing connection mechanism 4, and the cooperation between the hollow rubber sealing ring 42 and the sealing slot 43 realizes a stable sealing connection between the wind tube 1, the collector tube 9 and the diffuser tube 10; According to the demand of the load, the speed of the fan body 11 is artificially controlled through the wind speed control mechanism 7. By controlling the action of the servo motor 73, the servo motor 73 drives the transmission shaft 74 synchronously through the sprocket assembly 75 to drive the frequency conversion knob 72 to rotate. The frequency conversion knob 72 cooperates with the frequency converter 71 to control the speed of the fan body 11. When the frequency conversion knob 72 is rotated, the resistance value inside the frequency conversion knob 72 will change. The resistance value signal is transmitted to the control circuit of the frequency converter 71. The control circuit changes the output frequency according to the signal and the preset parameters (such as the voltage-frequency curve, etc.). For example, rotating the knob clockwise will increase the resistance value. The control circuit of the frequency converter 71 interprets this change as a speed-up signal, thereby increasing the frequency of the AC power output to the fan motor and increasing the fan speed; conversely, rotating the knob counterclockwise will reduce the motor speed. When the frequency conversion knob 72 is rotated and adjusted, the servo motor 73 cooperates with the bevel gear assembly 83 to drive the input end of the speed increasing gear box 81 to rotate synchronously, and then the speed increasing gear box 81 amplifies the rotational displacement of the frequency conversion knob 72 and drives the synchronous screw 84 to rotate. The threaded sleeve connection between the synchronous screw 84 and the synchronous seat 85 allows the synchronous seat 85 to move in the feedback shell 82. Specifically, when the required speed of the fan body 11 is higher, the angle of rotation of the frequency conversion knob 72 is larger, and the moving distance of the synchronous seat 85 is larger. First, the synchronous seat 85 drives the feedback conductive contact 87 to slide on the feedback resistor rod 86. The higher the speed of the fan body 11, the greater the sliding distance of the feedback conductive contact 87 on the feedback resistor rod 86, and the smaller the access resistance of the feedback resistor rod 86, and the feedback conductive contact 87 and the feedback The feed resistor rod 86 is connected in series to the power supply circuit of the force electromagnetic plate 412, so that the power supply current of the force electromagnetic plate 412 is larger, and the force electromagnetic plate 412 is energized to generate the same and larger magnetic force as the force-bearing permanent magnet plate 411, thereby driving the piston plate 47 to cooperate with the anti-drop rod 48 to overcome the elastic force of the return spring 410 to slide a larger distance in the compressed air cylinder 46, thereby pressing more air in the compressed air cylinder 46 into the hollow sealing frame 41, and then pressing the air into the hollow rubber sealing ring 42, so that the hollow rubber sealing ring 42 produces a larger deformation expansion, so that the sealing performance of the hollow rubber sealing ring 42 and the sealing slot 43 is better, so that the higher the speed of the fan body 11, the better the sealing performance between the wind tube 1, the collecting tube 9 and the diffuser tube 10, while ensuring the sealing effect, it also avoids the problem of damage to the sealing material caused by excessive compression; When the synchronous seat 85 moves, it will drive the pressure monitoring plate 88 to move. When the speed of the fan body 11 is higher, the distance the pressure monitoring plate 88 moves is greater, so that the distance between the pressure monitoring plate 88 and the moving plate 811 is greater. Initially, after the speed control of the fan body 11 is completed, the PLC controller 12 controls the drive motor 810 to move, and the drive motor 810 drives the self-rotating screw 89 to rotate. The moving plate 811 moves synchronously through the threaded sleeve effect of the self-rotating screw 89 and the moving plate 811. When the drive motor 810 is working in the forward direction, the PLC controller 12 synchronously controls the stepping motor 33 to move, and the stepping motor 33 drives the clamping screw 32 to rotate. Through the threaded sleeve effect of the clamping screw 32 and the pushing plate 34, the clamping screw 32 is connected to the pushing plate 34. The pushing plate 34 cooperates with the pushing rod 35 to push the rubber pressure block 36 toward the installation frame 21, providing an extrusion force to the installation frame 21, and assisting the fan body 11 to be installed and fixed more stably, until the moving plate 811 presses on the pressure monitoring plate 88, and the extrusion pressure of the pressure monitoring plate 88 reaches a preset threshold value, the PLC controller 12 controls the drive motor 810 and the stepper motor 33 to stop moving synchronously, and the drive motor 810 and the stepper motor 33 both have a self-locking mechanism. Specifically, the higher the fan speed control is, the greater the distance between the pressure monitoring plate 88 and the moving plate 811 is, the longer it takes for the drive motor 810 and the stepper motor 33 to stop working, thereby making the rubber pressure block 36 move a greater distance, which is The fan body 11 provides a greater extrusion fixing force to avoid the problem that the fan body 11 will be affected by the greater vibration due to the increase in the speed, which will affect the stable installation of the fan body 11. At the same time, it also avoids the fan body 11 using too large a clamping fixing force at a lower speed, which will make the connection between the fan and the wind tube 1 too rigid and unable to effectively buffer normal small vibrations, thereby generating unnecessary noise and vibration. During the use of the fan body 11, if it is necessary to adjust the fan speed according to the load change, it is divided into the following two situations. The first is that when the speed of the fan body 11 needs to be further increased, the PLC controller 12 will control the servo motor 73 to continue to rotate forward, so that the synchronous seat 85 drives the pressure monitoring plate 88 to continue to move forward. The second situation is that when the fan speed needs to be reduced, the PLC controller 12 controls the servo motor 73 to reverse, so that the pressure monitoring plate 88 moves toward the moving plate 811, thereby increasing the squeezing force of the moving plate 811 on the pressure monitoring plate 88. At this time, the PLC controller 12 receives the pressure signal fed back by the pressure monitoring plate 88 to control the drive motor 810 and the stepper motor 33 to reverse synchronously, thereby reducing the clamping force on the fan body 11.Until the position between the moving plate 811 and the pressure monitoring plate 88 makes the pressure monitoring plate 88 return to the preset threshold range, the clamping force of the fan body 11 is automatically adjusted based on the speed change of the fan body 11; Since the indirect evaporative cooling process involves the evaporation of water, the fan body 11 will bring some unevaporated water droplets out of the unit when conveying air. The water droplets will hit the water baffle assembly 51 with the air. The water baffle assembly 51 changes the direction of the airflow, so that the water droplets are separated from the air under the action of inertia, and the water droplets flow along the wall of the water baffle assembly 51 into the water collection tube 53 and are discharged through the drain pipe 54. Avoiding the discharge of water droplets with the air will not only affect the indoor environmental humidity, but also cause damage to the equipment downstream of the unit, such as causing electrical The problem of equipment short circuit occurs, and the air passing through the diffusion tube 10 drives the wind wheel 62 to rotate, and the wind wheel 62 drives the cam 63 to rotate synchronously. When the protruding part of the cam 63 is squeezed on the upper side of the knocking rod 66, it drives the knocking rod 66 to cooperate with the reciprocating rod 65 to overcome the elastic force of the reciprocating spring 67 and move downward, so that the knocking ball 68 knocks on the water diversion cone head 52. When the protruding part of the cam 63 leaves the knocking rod 66, the reciprocating spring 67 will make the knocking rod 66 move up again, so that the knocking ball 68 can hit the water diversion cone head. The continuous knocking of 52 causes the water baffle assembly 51 to vibrate slightly, so that the water droplets accumulated on the water baffle assembly 51 are subjected to additional force, which accelerates the flow speed of the water droplets on the surface of the water baffle assembly 51 and increases the speed of water droplet collection. The higher the speed of the fan body 11, the faster the air circulation speed will be, which will drive the wind wheel 62 to increase its speed, and the knocking frequency of the knocking ball 68 on the water guide cone head 52 will be higher, and the auxiliary water collection strength of the water baffle assembly 51 will be greater, because when the fan speed is too fast, the air will flow faster. When the flow rate in the unit is too high, the contact time between the air and the water droplets is too short, and the water droplets are carried out of the unit before they can fully evaporate. More water droplets will be carried out and accumulate on the water baffle assembly 51. Further increasing the water collection speed can avoid the problem that the water droplets that have not had time to slide into the water collection tube 53 will be further carried out by the high-speed air. In addition, because the rotation speed of the fan body 11 is increased, the air circulation speed is faster, and the frequency of knocking on the water baffle assembly 51 is increased under the action of wind force. Will not directly cause the problem of water droplets falling off the water baffle assembly 51.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan of an indirect evaporative water chiller, comprising a fan cylinder (1), a collector cylinder (9) being fixedly connected to the lower end of the fan cylinder (1), a diffuser cylinder (10) being fixedly connected to the upper end of the fan cylinder (1), a fan body (11) being fixedly mounted in the fan cylinder (1), characterized in that: Also includes: A limit installation mechanism (2) is fixedly installed between the wind tube (1) and the fan body (11); a pressing and clamping mechanism (3) is installed outside the wind tube (1) and is used to provide a pressing force to the limit installation mechanism (2); two sets of self-adjusting sealing connection mechanisms (4) are respectively installed between the wind tube (1) and the collecting tube (9) and between the wind tube (1) and the diffuser tube (10); a water retaining mechanism (5) is fixedly installed on the inner wall of the diffuser tube (10); and an auxiliary knocking mechanism (6) is fixedly installed on the inner wall of the diffuser tube (10). and is located on the upper side of the water retaining mechanism (5); a wind speed regulating mechanism (7) electrically connected to the fan body (11); a wind speed synchronous feedback regulating mechanism (8) fixedly mounted on the wind speed regulating mechanism (7) and transmission-connected to the wind speed regulating mechanism (7); and a PLC controller (12) fixedly mounted outside the wind speed regulating mechanism (7) and electrically connected to the extrusion clamping mechanism (3), the self-adjusting sealing connection mechanism (4), the wind speed regulating mechanism (7) and the wind speed synchronous feedback regulating mechanism (8), respectively.

2. The fan of the indirect evaporative chiller according to claim 1, characterized in that: The limit installation mechanism (2) comprises a mounting frame (21) arranged in the wind tube (1); the inner wall of the mounting frame (21) is fixedly connected to a same positioning frame (23) via a plurality of mounting rods (22); the positioning frame (23) is fixedly sleeved outside the fan body (11); a plurality of limit rods (24) are sleeved on the side wall of the wind tube (1); a plurality of limit holes (25) are provided on the side wall of the mounting frame (21) and are sleeved with the limit rods (24); the limit rods (24) and the wind tube (1) are detachably fixedly connected via bolts.

3. The fan of the indirect evaporative chiller according to claim 1, characterized in that: The squeezing and clamping mechanism (3) comprises a U-shaped fixing plate (31) fixedly connected to the outer wall of the wind tube (1); the U-shaped fixing plate (31) and the wind tube (1) are rotatably connected to a same clamping screw (32); a stepping motor (33) for driving the clamping screw (32) to rotate is fixedly mounted on the outer wall of the U-shaped fixing plate (31); a squeezing and pushing plate (34) is threadedly sleeved on the rod wall of the clamping screw (32); a plurality of squeezing and pushing rods (35) are symmetrically fixedly connected to the side wall of the squeezing and pushing plate (34); the ends of the plurality of squeezing and pushing rods (35) away from the squeezing and pushing plate (34) extend through the wind tube (1) and are fixedly connected to a same rubber pressing block (36); and an embedding groove (37) for placing the rubber pressing block (36) is provided on the inner wall of the wind tube (1).

4. The fan of the indirect evaporative chiller according to claim 1, characterized in that: The self-adjusting sealing connection mechanism (4) comprises a hollow sealing frame (41), the upper and lower ends of the hollow sealing frame (41) are fixedly connected to hollow rubber sealing rings (42), the two ends of the wind tube (1), the upper end of the collecting tube (9) and the lower end of the diffuser tube (10) are provided with sealing slots (43) which are sealed and plugged with the hollow rubber sealing ring (42), the hollow sealing frame (41) and the hollow rubber sealing ring (42) are connected, the outer wall of the hollow sealing frame (41) is fixedly connected to a U-shaped connecting plate (44), the outer walls of the wind tube (1), the collecting tube (9) and the diffuser tube (10) are fixedly connected to a locking plate (45) which is arranged in contact with the U-shaped connecting plate (44), the U-shaped connecting plate (44) and the locking plate (45) are fixedly connected by bolts, and the U-shaped connecting plate A compressed air cylinder (46) is fixedly sleeved on the side wall of (44), a piston plate (47) is provided in the sealing sleeve inside the compressed air cylinder (46), a plurality of anti-slip rods (48) are symmetrically fixedly connected to the rear side of the piston plate (47), one end of the anti-slip rod (48) away from the piston plate (47) penetrates and extends out of the rear end of the compressed air cylinder (46), and is fixedly connected to an anti-slip plate (49), a return spring (410) sleeved on the outside of the anti-slip rod (48) is fixedly connected between the anti-slip plate (49) and the compressed air cylinder (46), a force-bearing permanent magnetic plate (411) is fixedly connected to the side wall of the piston plate (47), a force-applying electromagnetic plate (412) arranged opposite to the force-bearing permanent magnetic plate (411) is fixedly installed on the inner wall of the compressed air cylinder (46), and the compressed air cylinder (46) and the hollow sealing frame (41) are connected.

5. The fan of the indirect evaporative chiller according to claim 1, characterized in that: The water retaining mechanism (5) comprises a water retaining plate assembly (51) fixedly mounted on the inner wall of the diffuser tube (10); a water diversion cone head (52) is fixedly connected to the center position of the lower end of the water retaining plate assembly (51); the lower end of the water retaining plate assembly (51) is also fixedly connected to a water collecting cylinder (53) sleeved outside the water diversion cone head (52); the cylinder wall of the water collecting cylinder (53) is fixedly connected to a drainage pipe (54); one end of the drainage pipe (54) away from the water collecting cylinder (53) passes through and extends out of the diffuser tube (10).

6. The fan of the indirect evaporative chiller according to claim 5, characterized in that: The auxiliary knocking mechanism (6) comprises a support frame (61) fixedly mounted on the inner wall of the diffusion tube (10), a wind wheel (62) being rotatably connected to the support frame (61) via a rotating shaft, one end of the rotating shaft extending through the support frame (61) and fixedly connected to a cam (63), a horizontal plate (64) being fixedly connected to the outer wall of the lower end of the support frame (61), a plurality of reciprocating rods (65) arranged side by side being movably inserted on the surface of the horizontal plate (64), a knocking rod (66) having the same L-shaped structure being fixedly connected to the upper ends of the plurality of reciprocating rods (65), a plurality of reciprocating springs (67) sleeved on the outside of the reciprocating rods (65) being fixedly connected to the lower ends of the knocking rods (66) and the upper ends of the horizontal plate (64), and a knocking ball (68) located on the upper side of the water diversion cone head (52) being fixedly connected to the lower ends of the knocking rods (66).

7. The fan of the indirect evaporative chiller according to claim 1, characterized in that: The wind speed control mechanism (7) comprises a frequency converter (71), a frequency conversion knob (72) is mounted on the frequency converter (71), a servo motor (73) is fixedly mounted on the upper end of the frequency converter (71), a transmission shaft (74) is fixedly connected to the center of the upper end of the frequency conversion knob (72), and the output end of the servo motor (73) and the transmission shaft (74) are transmission-connected via a sprocket assembly (75).

8. The fan of the indirect evaporative chiller according to claim 7, characterized in that: The wind speed synchronous feedback adjustment mechanism (8) comprises a speed increasing gearbox (81) and a feedback housing (82) fixedly mounted on the upper end of the frequency converter (71); the input end of the speed increasing gearbox (81) is transmission-connected to the output end of the servo motor (73) via a bevel gear assembly (83); a synchronous screw (84) is rotatably connected inside the feedback housing (82); one end of the synchronous screw (84) extends through the feedback housing (82) and is fixedly connected to the output end of the speed increasing gearbox (81); a synchronous seat (85) is threadedly sleeved on the rod wall of the synchronous screw (84); and a synchronous screw (84) is fixedly mounted on the lower side of the inner wall of the feedback housing (82) and is connected to the synchronous screw (84). ) is arranged parallel to a feedback resistor rod (86), the lower end of the synchronous seat (85) is fixedly connected to a feedback conductive contact piece (87) that is in electrical contact with the feedback resistor rod (86), a pressure monitoring plate (88) is fixedly installed on one side of the upper end of the synchronous seat (85), the upper side of the inner wall of the feedback shell (82) is rotatably connected to a self-rotating screw (89) arranged parallel to the synchronous screw (84), the outer wall of the feedback shell (82) is fixedly installed with a driving motor (810) for driving the self-rotating screw (89) to rotate, the rod wall of the self-rotating screw (89) is threadedly sleeved with a moving plate (811), and the moving plate (811) is arranged opposite to the pressure monitoring plate (88).

Images