Energy-saving industrial centrifugal ventilator capable of assisting heat dissipation of motor

Abstract

The invention relates to the technical field of fan heat dissipation, in particular to an energy-saving industrial centrifugal fan capable of assisting heat dissipation of a motor. The energy-saving industrial centrifugal ventilator comprises a machine shell with an air inlet and an air outlet, a first impeller is rotationally arranged in the machine shell, and one end of the first impeller is coaxially connected with a motor arranged outside the machine shell. Gas is guided through the pressure intensity difference between the air inlet and the air outlet, cooling liquid is cooled in the process that external gas is sucked in, and the gas at the air outlet drives the cooling liquid to circularly flow through the double-turbine assembly in the flowing process. Thus, when the power of the motor is increased or decreased, the rotating speed of the first impeller changes correspondingly, so that the flow speed of gas in the suction pipe and the flow guide pipe is affected, circulation and heat exchange of cooling liquid are adjusted correspondingly, and then the heat dissipation balance of the motor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fan heat dissipation, and in particular to an energy-saving industrial centrifugal fan capable of assisting motor heat dissipation. Background Art

[0002] Centrifugal fans are a type of impeller machinery, widely used in various fields such as energy, environment, aviation, etc., and are one of the main energy-consuming equipment in industrial and agricultural production. Centrifugal fans are one of the four major parts in the dust removal and ventilation system. They are a relatively precise operating machine that relies on the rotation of the impeller to form negative pressure inside the fan, sucking in external gas and discharging it from the fan through the impeller flow channel and volute.

[0003] The centrifugal fan is mainly composed of a casing, an impeller, a shaft, a collector, an air outlet, a bearing housing, a coupling and a base. The motor is mainly set on one side of the casing to drive the impeller to rotate. However, the current cooling method for the motor is mostly natural cooling. Over time, a large amount of heat will accumulate around the motor. In the related technology, for example, a Chinese patent with the announcement number CN118327999A discloses a soundproof and heat-dissipating high-pressure fan, comprising: a fan body is arranged on the upper surface of a bracket plate, a silencer is arranged on the outer end of the air duct, and a cooling box is arranged on the surface of a driving motor; when the driving motor needs to be cooled, the water pump motor and the cooling fan are started, and the water pump motor on one side inputs the coolant that absorbs the heat of the driving motor in the cooling box into the heat sink for heat dissipation through the drainage fan, and the water pump motor on the other side then pumps the cooled coolant into the cooling box to cool the driving motor.

[0004] However, although the above patent uses water cooling to cool the drive motor, in this patent, the flow of water and the cooling of water need to be realized by another motor and a fan. The other motor and the fan operate according to the set parameters. When the power of the drive motor changes, it is difficult for the other motor and the fan to adjust the cooling capacity according to the operating power of the drive motor in time, which easily leads to the drive motor being overcooled or overheated during the cooling process. Summary of the invention

[0005] The object of the present invention is to provide an energy-saving industrial centrifugal fan capable of assisting motor heat dissipation, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, an energy-saving industrial centrifugal fan capable of assisting motor heat dissipation is provided, comprising a casing having an air inlet and an air outlet, a first impeller being rotatably arranged inside the casing, one end of the first impeller being coaxially connected to a motor arranged outside the casing, the motor and the casing being both mounted on a base, and further comprising a cooling box sleeved on the outer periphery of the motor and having a coolant inside, a heat exchange mechanism and a driving mechanism being arranged outside the cooling box, wherein: A portion of the heat exchange mechanism is connected to the air inlet so as to draw in external air through the negative pressure at the air inlet, and another portion of the heat exchange mechanism passes through the cooling box and contacts the coolant in the cooling box so as to exchange heat with the coolant in the cooling box during the process of the external air being drawn in; The driving mechanism includes a guide pipe with one end connected to the air inlet and the other end connected to the air outlet, and a dual-turbine assembly arranged between the guide pipe and the motor, wherein the guide pipe is used to guide part of the gas at the air outlet to the air inlet; the dual-turbine assembly uses the gas flowing in the guide pipe to drive the circulation of the coolant in the cooling box.

[0007] As a further improvement of the technical solution, the middle portion of the air outlet has a contraction portion contracting inwards.

[0008] As a further improvement of the present technical solution, the cooling box is an arc-shaped structure that is adapted to the curvature of the outer ring of the motor, and part of the inner ring of the cooling box extends toward the motor to form a protrusion; the inner ring on the top of the cooling box is provided with a guide plate at each protrusion; the interior of the cooling box is also provided with a partition that divides the interior into a liquid inlet chamber and a liquid outlet chamber, one end of the liquid inlet chamber and the liquid outlet chamber are connected, the other end of the liquid inlet chamber is connected to a liquid inlet, and the other end of the liquid outlet chamber is connected to a liquid outlet.

[0009] As a further improvement of the technical solution, the bottom end of the protrusion is made of copper.

[0010] As a further improvement of the present technical solution, the heat exchange mechanism includes a suction pipe having one end connected to the air inlet and the other end connected to the shell, and one side of the shell is connected to a heat exchange pipe that passes through the cooling box.

[0011] As a further improvement of the technical solution, the heat exchange tube is located inside the protrusion.

[0012] As a further improvement of the present technical solution, the driving mechanism also includes a connecting pipe with one end connected to the liquid inlet and the other end connected to the liquid outlet, and one side of the connecting pipe and the guide pipe are both connected to a vortex casing for placing the dual turbine assembly.

[0013] As a further improvement of the technical solution, the twin turbine assembly includes a second impeller and a third impeller, wherein: The second impeller is rotatably disposed in a volute located at the guide pipe; The third impeller is rotatably disposed in a volute located in the connecting pipe; A connecting shaft is provided between the second impeller and the third impeller to coaxially and fixedly connect the two impellers. The connecting shaft penetrates the volute and is rotationally connected to the volute.

[0014] As a further improvement of the technical solution, an atomizing nozzle is provided on the inner ring of the cooling box between two adjacent protrusions, and a liquid suction port is provided on one side of the shell close to the atomizing nozzle; The top portion of the connecting pipe between the third impeller and the liquid outlet is connected to a liquid storage pot, wherein coolant is stored inside the liquid storage pot, and a blocking member is provided between the liquid storage pot and the liquid outlet, wherein the blocking member releases or intercepts the coolant in the connecting pipe between the liquid storage pot and the liquid outlet according to the airflow intensity in the guide pipe.

[0015] As a further improvement of the technical solution, the blocking member includes an air sensing plate rotatably arranged in the guide tube, and a valve ball rotatably arranged in the connecting tube, the outer ring of the valve ball is penetrated with a through hole, a rotating shaft is arranged between the valve ball and the air sensing plate to fix the two, the rotating shaft penetrates the guide tube and the connecting tube, the rotating shaft is rotatably connected with the guide tube and the connecting tube, and a coil spring is arranged between the outer ring of the rotating shaft and the top of the connecting tube; Under normal conditions, the through hole and the connecting pipe are arranged in the same direction to release the coolant flowing in the connecting pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the energy-saving industrial centrifugal fan that can assist in the heat dissipation of the motor, the pressure difference between the air inlet and the air outlet is used to guide the gas, so that the coolant is cooled during the inhalation of the external gas, and the gas at the air outlet drives the coolant to circulate through the dual turbine assembly during the flow process. In this way, when the motor power increases or decreases, the speed of the first impeller will change accordingly, thereby affecting the flow rate of the gas in the suction pipe and the guide pipe, so that the circulation and heat exchange of the coolant are adjusted accordingly, thereby improving the balance of the heat dissipation of the motor.

[0017] 2. In the energy-saving industrial centrifugal fan that can assist in the heat dissipation of the motor, when the power of the motor increases, the airflow in the guide pipe drives the valve ball to seal the connecting pipe, forcing the coolant to be unable to circulate, and then sprayed out to the vicinity of the motor through the atomizing nozzle, directly cooling the motor and improving the efficiency of cooling the motor.

[0018] 3. In the energy-saving industrial centrifugal fan that can assist in the heat dissipation of the motor, the coolant sprayed through the atomizing nozzle will also be sucked into the casing through the liquid suction port, thereby cooling the exhaust gas inside the casing and avoiding the exhaust gas inside the casing being too hot and causing an explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic structural diagram of the casing of the present invention; Figure 3 It is a structural schematic diagram of the liquid inlet of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the cooling cover of the present invention; Figure 5 It is a schematic structural diagram of the partition of the present invention; Figure 6 It is a structural schematic diagram of the heat exchange mechanism of the present invention; Figure 7 The structure of the driving mechanism of the present invention is shown in FIG. Figure 1 ; Figure 8 The structure of the driving mechanism of the present invention is schematically shown in FIG. Figure 2 ; Fig. 9 It is a schematic diagram of the flow direction of gas inside the flow guide tube of the present invention.

[0020] The meaning of each number in the figure is: 100, housing; 101, air inlet; 102, air outlet; 103, first impeller; 104, motor; 105, contraction part; 110, cooling box; 111, liquid inlet; 112, liquid outlet; 113, protrusion; 114, guide plate; 115, partition; 116, liquid inlet cavity; 117, liquid outlet cavity; 118, atomizing nozzle; 120, heat exchange mechanism; 121, shell; 122, heat exchange tube; 123, suction tube; 124, liquid suction port; 130. Driving mechanism; 131. Guide pipe; 132. Connecting pipe; 133. Second impeller; 134. Third impeller; 135. Connecting shaft; 136. Liquid storage pot; 140. Wind sensing plate; 141. Rotating shaft; 142. Valve ball; 143. Through hole; 144. Coil spring. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] like Figure 1 and Figure 2 As shown, an energy-saving industrial centrifugal fan capable of assisting the heat dissipation of a motor is provided, comprising a housing 100 having an air inlet 101 and an air outlet 102, a first impeller 103 being rotatably arranged inside the housing 100, one end of the first impeller 103 being coaxially connected to a motor 104 arranged outside the housing 100, and the motor 104 and the housing 100 being mounted on a base. When exhausting air, the first impeller 103 is driven to rotate by the output shaft of the motor 104, so that negative pressure is generated at the air inlet 101, and the gas is sucked into the housing 100 through the air inlet 101, and then discharged from the air outlet 102.

[0025] exist Figure 1In the embodiment, the centrifugal fan also includes a cooling box 110 which is sleeved on the outer periphery of the motor 104 and has a coolant inside. A heat exchange mechanism 120 and a driving mechanism 130 are arranged on the outside of the cooling box 110, wherein a part of the heat exchange mechanism 120 is connected to the air inlet 101 so as to inhale the external air through the negative pressure at the air inlet 101, and another part of the heat exchange mechanism 120 passes through the cooling box 110 and contacts with the coolant in the cooling box 110, so as to exchange heat with the coolant in the cooling box 110 during the process of the external air being inhaled; the driving mechanism 130 includes a guide pipe 131 which is connected to the air inlet 101 at one end and to the air outlet 102 at the other end, and a twin-turbine assembly arranged between the guide pipe 131 and the motor 104, the guide pipe 131 is used to guide part of the gas at the air outlet 102 to the air inlet 101, and the twin-turbine assembly uses the gas flowing in the guide pipe 131 to drive the coolant in the cooling box 110 to circulate.

[0026] That is to say, the gas is guided by utilizing the pressure difference between the air inlet 101 and the air outlet 102, so that the coolant is cooled during the process of being sucked in by the outside gas, and the gas at the air outlet 102 drives the coolant to circulate through the dual turbine assembly during the flow process. In this way, when the power of the motor 104 is increased or decreased, the rotation speed of the first impeller 103 will change accordingly, thereby affecting the flow rate of the gas in the suction pipe 123 (to be described in detail below) and the guide pipe 131, so that the circulation and heat exchange of the coolant are adjusted accordingly, thereby improving the balance of heat dissipation of the motor 104.

[0027] In the above, the middle of the air outlet 102 has an inwardly contracted portion 105 for reducing the outlet area of ​​the air outlet 102 so that the air outlet 102 can always be in a positive pressure state, so as to send part of the gas into the guide tube 131.

[0028] like Figure 4 As shown, the cooling box 110 is an arc-shaped structure that matches the curvature of the outer ring of the motor 104, and part of the inner ring of the cooling box 110 extends toward the motor 104 to form a protrusion 113. The bottom of the protrusion 113 is preferably made of copper with strong thermal conductivity to improve the heat exchange efficiency between the coolant and the motor 104. At the same time, the inner ring at the top of the cooling box 110 is provided with a guide plate 114 at each protrusion 113. Figure 5 As shown, the cooling box 110 is further provided with a partition 115 for dividing the interior of the cooling box 110 into a liquid inlet chamber 116 and a liquid outlet chamber 117. One end of the liquid inlet chamber 116 and the liquid outlet chamber 117 are connected. Then, as shown in FIG. Figure 3 As shown, the other end of the liquid inlet cavity 116 is connected to the liquid inlet 111 , and the other end of the liquid outlet cavity 117 is connected to the liquid outlet 112 .

[0029] In this way, when the coolant needs to flow, the coolant will enter the liquid inlet cavity 116 through the liquid inlet 111. When the coolant flows to the connection between the liquid inlet cavity 116 and the liquid outlet cavity 117, the coolant enters the liquid outlet cavity 117 and then is discharged through the liquid outlet 112. By connecting the liquid outlet 112 with the liquid inlet 111 (to be described in detail below), the circulation of the coolant in the cooling box 110 is achieved.

[0030] like Figure 6 As shown, the heat exchange mechanism 120 includes a suction pipe 123 connected to the air inlet 101 at one end and connected to the shell 121 at the other end. One side of the shell 121 is connected to a heat exchange pipe 122 that penetrates the cooling box 110. The heat exchange pipe 122 is also preferably made of copper to improve the heat exchange efficiency. Figure 4 As shown, the heat exchange tube 122 is located inside the protrusion 113. Under the action of the guide plate 114, the coolant in the cooling box 110 will hit one side of the guide plate 114 during the flow process, then enter the bottom end of the protrusion 113, and finally flow to the other side of the guide plate 114 through the bottom end of the protrusion 113. At this time, the coolant can continuously contact the heat exchange tube 122 during the flow process, so as to achieve uniform heat exchange of the heat exchange tube 122.

[0031] like Figure 7 As shown, the driving mechanism 130 further includes a connecting pipe 132, one end of which is connected to the liquid inlet 111 and the other end of which is connected to the liquid outlet 112. One side of the connecting pipe 132 and the guide pipe 131 are both connected to a volute for placing a twin turbine assembly (the protruding parts of the guide pipe 131 and the connecting pipe 132). The dual-turbine assembly includes a second impeller 133 and a third impeller 134. The second impeller 133 is rotatably arranged in a volute located at the guide pipe 131, and the third impeller 134 is rotatably arranged in a volute located in the connecting pipe 132. At the same time, a connecting shaft 135 is arranged between the second impeller 133 and the third impeller 134 to coaxially fix the two. The connecting shaft 135 passes through the volute and is rotatably connected to the volute.

[0032] Working principle: First combine Fig. 9 As shown, negative pressure is generated at the air inlet 101 to suck in the gas, and positive pressure is generated at the air outlet 102 to discharge the gas. In this process, the negative pressure at the air inlet 101 will suck the suction pipe 123 and the guide pipe 131. At this time, the suction pipe 123 sucks the external air into the air inlet 101 through the shell 121 and the heat exchange tube 122, and the guide pipe 131 sucks part of the gas at the air outlet 102 into the air inlet 101. The gas entering the air inlet 101 will be discharged through the air outlet 102 again.

[0033] When the outside air is sucked into the heat exchange tube 122 , the outside air exchanges heat with the coolant in the cooling box 110 through the heat exchange tube 122 to reduce the temperature of the coolant in the cooling box 110 .

[0034] When the air inlet 101 sucks part of the gas at the air outlet 102 through the guide tube 131, the gas will drive the second impeller 133 to rotate during the flow in the guide tube 131. The rotation of the second impeller 133 drives the third impeller 134 to rotate through the connecting shaft 135. The rotation of the third impeller 134 promotes the flow of coolant in the connecting tube 132. At this time, the coolant enters the liquid inlet chamber 116 through the liquid inlet port 111, and the flowing coolant will first hit one side of the guide plate 114, and then enter the bottom end of the protrusion 113, and exchange heat with the motor 104 through the bottom end of the protrusion 113, so as to cool the motor 104; finally, it flows to the other side of the guide plate 114 through the bottom end of the protrusion 113. When the coolant reaches one end of the liquid inlet chamber 116, it enters the liquid outlet chamber 117 through the connection between the liquid inlet chamber 116 and the liquid outlet chamber 117, and then is discharged into the connecting pipe 132 through the liquid outlet port 112, thereby realizing a circulating flow.

[0035] When the power of the motor 104 increases, the rotation speed of the first impeller 103 increases accordingly. At this time, the negative pressure at the air inlet 101 is further increased, and the positive pressure at the air outlet 102 is also further increased. At this time, the gas flow rate in the heat exchange tube 122 changes, thereby improving the heat exchange efficiency of the coolant; the gas flow rate in the guide tube 131 becomes faster, thereby increasing the flow rate of the coolant, thereby achieving the performance of adjusting the heat dissipation according to the power of the motor 104.

[0036] Furthermore, in order to further improve the cooling efficiency of the motor 104 when it is working at high power, Figure 4 as well as Figure 6-Figure 8 As shown: An atomizing nozzle 118 is provided on the inner circle of the cooling box 110 between two adjacent protrusions 113, and a liquid suction port 124 is provided on the side of the shell 121 close to the atomizing nozzle 118; the top of the connecting pipe 132 is located between the third impeller 134 and the liquid outlet 112 and is connected to a liquid storage pot 136, and the liquid storage pot 136 stores coolant inside, and a blocking member is provided between the liquid storage pot 136 and the liquid outlet 112, and the blocking member releases or intercepts the coolant in the connecting pipe 132 between the liquid storage pot 136 and the liquid outlet 112 according to the airflow intensity in the guide pipe 131.

[0037] Specifically, the blocking member includes an air sensing plate 140 rotatably disposed in the flow guide tube 131, and a valve ball 142 rotatably disposed in the connecting tube 132, a through hole 143 is disposed through the outer ring of the valve ball 142, a rotating shaft 141 is disposed between the valve ball 142 and the air sensing plate 140 to connect the two, the rotating shaft 141 is disposed through the flow guide tube 131 and the connecting tube 132, the rotating shaft 141 is rotatably connected with the flow guide tube 131 and the connecting tube 132, and a coil spring 144 is disposed between the outer ring of the rotating shaft 141 and the top of the connecting tube 132. In normal conditions, the through hole 143 is disposed in the same direction as the connecting tube 132, so as to release the coolant flowing in the connecting tube 132, so that the coolant can flow normally; the volume of the air sensing plate 140 is smaller than the diameter of the flow guide tube 131, so that the air flow can flow through the gap between the air sensing plate 140 and the flow guide tube 131.

[0038] In this way, when the motor 104 is not in the maximum power state, the flow rate of the gas in the guide tube 131 is low, and it is difficult to overcome the elasticity of the coil spring 144. At this time, the wind sensing plate 140 will not be pushed by the gas in the guide tube 131; when the motor 104 is in the maximum power state, the flow rate of the gas in the guide tube 131 is accelerated. At this time, the thrust applied by the gas to the wind sensing plate 140 overcomes the elasticity of the coil spring 144, thereby forcing the wind sensing plate 140 to rotate. The rotation of the wind sensing plate 140 drives the valve ball 142 to rotate through the rotating shaft 141. The rotation of the valve ball 142 drives the through hole 143 to adjust the angle, thereby making it difficult for the liquid in the connecting tube 132 to flow, thereby reducing the flow rate of the liquid in the connecting tube 132. In this way, the coolant at the liquid outlet 112 is blocked by the valve ball 142 and cannot flow out normally, while the third impeller 134 pushes the coolant in the liquid storage pot 136 into the cooling box 110 during the rotation process, forcing the pressure in the cooling box 110 to increase, so that the coolant in the cooling box 110 is sprayed out through the atomizing nozzle 118, and the sprayed coolant floats around the motor 104, reducing the temperature of the air around the motor 104, thereby cooling the motor 104. Then, the suction pipe 123 sucks the scattered coolant through the housing 121 and the liquid suction port 124, and the sucked coolant enters the air inlet 101, and then is discharged through the air outlet 102, which also reduces the temperature of the housing 100 and the gas inside the housing 100.

[0039] In summary, when the power of the motor 104 increases, the airflow in the guide tube 131 drives the valve ball 142 to block the connecting tube 132, forcing the coolant to be unable to circulate, thereby being sprayed around the motor 104 through the atomizing nozzle 118, directly cooling the motor 104 and improving the efficiency of cooling the motor 104.

[0040] In addition, the coolant sprayed by the atomizing nozzle 118 will be sucked into the housing 100 through the liquid suction port 124 to cool the exhaust gas inside the housing 100 and prevent the exhaust gas inside the housing 100 from being too hot and causing an explosion.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An energy-saving industrial centrifugal fan capable of assisting motor heat dissipation, comprising a casing (100) having an air inlet (101) and an air outlet (102), a first impeller (103) being rotatably disposed inside the casing (100), one end of the first impeller (103) being coaxially connected to a motor (104) disposed outside the casing (100), the motor (104) and the casing (100) being both mounted on a base, characterized in that: It also includes a cooling box (110) which is sleeved on the outer periphery of the motor (104) and has a coolant inside. A heat exchange mechanism (120) and a drive mechanism (130) are arranged outside the cooling box (110), wherein: A portion of the heat exchange mechanism (120) is in communication with the air inlet (101) so as to draw in external air through the negative pressure at the air inlet (101); another portion of the heat exchange mechanism (120) passes through the cooling box (110) and contacts the coolant in the cooling box (110) so as to perform heat exchange on the coolant in the cooling box (110) during the process of drawing in external air; The driving mechanism (130) comprises a flow guide pipe (131) having one end connected to the air inlet (101) and the other end connected to the air outlet (102), and a twin turbine assembly arranged between the flow guide pipe (131) and the motor (104), wherein the flow guide pipe (131) is used to guide part of the gas at the air outlet (102) to the air inlet (101); the twin turbine assembly uses the gas flowing in the flow guide pipe (131) to drive the circulation of the coolant in the cooling box (110).

2. The energy-saving industrial centrifugal fan capable of assisting motor heat dissipation according to claim 1 is characterized in that: The middle portion of the air outlet (102) has a contraction portion (105) contracting inwards.

3. The energy-saving industrial centrifugal fan capable of assisting motor heat dissipation according to claim 1 is characterized in that: The cooling box (110) is an arc-shaped structure that matches the curvature of the outer ring of the motor (104), and part of the inner ring of the cooling box (110) extends toward the motor (104) to form a protrusion (113); the inner ring at the top of the cooling box (110) is provided with a guide plate (114) at each protrusion (113); the interior of the cooling box (110) is also provided with a partition plate (115) that divides the interior of the cooling box (110) into a liquid inlet chamber (116) and a liquid outlet chamber (117); one end of the liquid inlet chamber (116) and the liquid outlet chamber (117) are connected, the other end of the liquid inlet chamber (116) is connected to a liquid inlet port (111), and the other end of the liquid outlet chamber (117) is connected to a liquid outlet port (112).

4. The energy-saving industrial centrifugal fan capable of assisting motor heat dissipation according to claim 3 is characterized in that: The bottom end of the protrusion (113) is made of copper.

5. The energy-saving industrial centrifugal fan capable of assisting motor heat dissipation according to claim 3, characterized in that: The heat exchange mechanism (120) comprises a suction pipe (123) having one end connected to the air inlet (101) and the other end connected to the shell (121); one side of the shell (121) is connected to a heat exchange pipe (122) provided to penetrate the cooling box (110).

6. The energy-saving industrial centrifugal fan capable of assisting motor heat dissipation according to claim 5, characterized in that: The heat exchange tube (122) is located inside the protrusion (113).

7. The energy-saving industrial centrifugal fan capable of assisting motor heat dissipation according to claim 5, characterized in that: The driving mechanism (130) further comprises a connecting pipe (132) having one end in communication with the liquid inlet (111) and the other end in communication with the liquid outlet (112); one side of the connecting pipe (132) and the flow guide pipe (131) are both in communication with a volute for accommodating a twin-turbine assembly.

8. The energy-saving industrial centrifugal fan capable of assisting motor heat dissipation according to claim 7, characterized in that: The twin turbine assembly comprises a second impeller (133) and a third impeller (134), wherein: The second impeller (133) is rotatably disposed in a volute located at the guide pipe (131); The third impeller (134) is rotatably disposed in a volute located in the connecting pipe (132); A connecting shaft (135) is provided between the second impeller (133) and the third impeller (134) to coaxially and fixedly connect the two, and the connecting shaft (135) passes through the volute and is rotatably connected to the volute.

9. The energy-saving industrial centrifugal fan capable of assisting motor heat dissipation according to claim 8, characterized in that: An atomizing nozzle (118) is disposed on the inner ring of the cooling box (110) between two adjacent protrusions (113), and a liquid suction port (124) is disposed on a side of the housing (121) close to the atomizing nozzle (118); The portion of the top of the connecting pipe (132) located between the third impeller (134) and the liquid outlet (112) is connected to a liquid storage pot (136), wherein the liquid storage pot (136) stores cooling liquid, and a blocking member is provided between the liquid storage pot (136) and the liquid outlet (112), wherein the blocking member releases or intercepts the cooling liquid between the liquid storage pot (136) and the liquid outlet (112) in the connecting pipe (132) according to the airflow intensity in the guide pipe (131).

10. The energy-saving industrial centrifugal fan capable of assisting motor heat dissipation according to claim 9, characterized in that: The blocking member comprises an air sensing plate (140) rotatably arranged in the flow guide tube (131), and a valve ball (142) rotatably arranged in the connecting tube (132); the outer ring of the valve ball (142) is penetrated by a through hole (143); a rotating shaft (141) is arranged between the valve ball (142) and the air sensing plate (140) to fixedly connect the two; the rotating shaft (141) penetrates the flow guide tube (131) and the connecting tube (132); the rotating shaft (141) is rotatably connected to the flow guide tube (131) and the connecting tube (132); and a coil spring (144) is arranged between the outer ring of the rotating shaft (141) and the top of the connecting tube (132); Under normal conditions, the through hole (143) and the connecting pipe (132) are arranged in the same direction to allow the coolant flowing in the connecting pipe (132) to pass.

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