Energy-saving motor and movable industrial fan using same

Abstract

The invention discloses an energy-saving motor, and belongs to the technical field of motors, the motor comprises a casing, a stator is arranged in the casing, a rotor is arranged in the stator, a cooling pipeline is further arranged in the casing, the cooling pipeline comprises an inner heat absorption pipe and an outer heat absorption pipe, the inner heat absorption pipe is arranged outside the rotor, the inner heat absorption pipe and the rotor are in a direct non-contact state, and the outer heat absorption pipe is arranged inside and outside the stator. A cooling box is assembled outside the machine shell, the two ends of the cooling pipeline are connected with the cooling box to form an output end and an input end, and turbulent flow blades are fixedly connected to the two ends of the rotor. According to the invention, through a double-area heat dissipation structure of the inner heat absorption pipe and the outer heat absorption pipe, heat of a core heating part of the motor is accurately absorbed; through cooperation of semiconductor refrigeration and medium circulation of the cooling box, heat of a core heating part is directly absorbed, loss of heat transmitted in the machine shell is avoided, heat dissipation is more accurate, overload operation of the motor due to high temperature is avoided, extra energy consumption is reduced, and forward circulation of cooling and energy saving is achieved.

Description

Technical Field

[0001] This invention belongs to the field of motor technology, specifically relating to an energy-saving motor and a portable industrial fan using the energy-saving motor. Background Technology

[0002] During operation, the current passing through the windings and iron core of the motor generates heat. The resistance of components such as the motor windings and iron core increases with the temperature, and the Joule heat loss increases accordingly. Excessive temperature will increase the resistance, causing electrical energy to be converted into heat energy and resulting in loss. In addition, high temperature will cause the motor magnets to demagnetize and the clearance between components to change, increasing mechanical friction and magnetic loss.

[0003] Chinese invention patent CN120033912A discloses an energy-saving circulating water cooling structure for a permanent magnet motor. When a turbine rotates, it delivers coolant to the interiors of a first spiral cooling tank and a second spiral cooling tank. After entering the first spiral cooling tank, the coolant flows spirally from the front end of the housing to the rear end for cooling. Similarly, after entering the second spiral cooling tank, the coolant flows spirally from the rear end of the housing to the front end for cooling. This facilitating opposite flow of coolant allows for more uniform heat dissipation from the permanent magnet motor, improving heat dissipation efficiency.

[0004] Existing motors (such as permanent magnet motors) mostly employ a water-cooled heat dissipation structure with embedded double-helix cooling channels in the casing. Coolant circulation is driven by a turbine, supplemented by heat dissipation fins and impellers. This type of structure relies on indirect heat transfer through the casing, resulting in insufficient heat dissipation precision and a tendency for localized overheating in the core heat-generating areas of the stator and rotor. Furthermore, the high flow resistance of the coolant circulation channel necessitates additional power to drive the turbine and impeller, leading to high energy consumption. Additionally, the embedded flow channel makes disassembly and repair difficult, resulting in high maintenance costs. Moreover, traditional cooling motors are not designed for downstream applications such as portable industrial fans, making it difficult to meet the low energy consumption and high stability requirements of industrial fans operating under long-term high loads, thus limiting the effectiveness of these motors in industrial ventilation equipment. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] To address the problems mentioned in the background section, the present invention adopts the following technical solution.

[0007] An energy-saving motor includes a housing, a stator inside the housing, and a rotor inside the stator. The housing also includes a cooling pipe system comprising an inner heat-absorbing pipe and an outer heat-absorbing pipe. The inner heat-absorbing pipe is located outside the rotor and is in a non-contact state, while the outer heat-absorbing pipe is located inside and outside the stator and is in direct contact with it. A cooling box is mounted outside the housing. Both ends of the cooling pipe system are connected to the cooling box, forming an output end and an input end. Turbulence blades are fixedly connected to both ends of the rotor. The cool air released from the cooling pipe system is fully diffused within the housing through the turbulence blades.

[0008] Preferably, the inner heat absorption tube is made of non-metallic material and is arranged in a meandering manner, forming a circumferential shape with the rotor as the center. The outer heat absorption tube is made of copper and is also arranged in a meandering manner, forming a circumferential shape with the stator as the center.

[0009] Preferably, both ends of the inner heat absorption pipe and the outer heat absorption pipe are connected by valves. One valve is connected to a heat dissipation pipe, and the end of the heat dissipation pipe is connected to an input pipe, which is connected to the input end of the cooling box. The other valve is connected to an output pipe, which is connected to the output end of the cooling box.

[0010] Preferably, the cooling box contains a water pump and a thermoelectric cooler. The input pipe is coiled inside the cooling box, the cold end of the thermoelectric cooler contacts the coiled section of the input pipe, and the cooling box has a through hole for the hot end of the thermoelectric cooler to pass through the through hole and face outward. The end of the input pipe is connected to the input end of the water pump, and the output pipe is connected to the output end of the water pump.

[0011] Preferably, a drive shaft is fixed at the center of the rotor, and the drive shaft extends outward from both ends of the rotor. End caps are bolted to both ends of the housing, and the drive shaft extends outward through the end caps.

[0012] Preferably, bearings are fixedly sleeved at both ends of the drive shaft, and a support ring is provided at the center of the inner surface of the end cover, with the bearings fitted into the support ring.

[0013] Preferably, a cooling fan is fixedly connected to one end of the drive shaft, and the cooling fan is directly opposite the heat pipe. The cooling fan is covered with a protective cover, and the protective cover has heat dissipation holes.

[0014] Preferably, the protective cover and the end cap of the housing are detachably connected by a snap fastener, and the heat dissipation holes of the protective cover are grid-shaped and distributed in a circumferential manner.

[0015] Preferably, the outer surface of the heat pipe is integrally formed with a number of heat dissipation fins, which are evenly distributed along the length of the heat pipe, and the extension direction of the heat dissipation fins is adapted to the airflow direction of the cooling fan, so as to increase the heat dissipation area of ​​the heat pipe.

[0016] A portable industrial fan, driven by an energy-saving motor as described above, includes an industrial fan body, with the drive end of the energy-saving motor connected to the center of the fan blades of the industrial fan body.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In this invention, the heat of the core heat-generating components of the motor is precisely absorbed by the dual-zone heat dissipation structure of the inner heat-absorbing pipe and the outer heat-absorbing pipe; combined with the semiconductor refrigeration and medium circulation of the cooling box, the heat of the core heat-generating components is directly absorbed, avoiding the loss of heat transfer in the casing, making the heat dissipation more precise, avoiding the motor from running under high temperature overload, reducing additional energy consumption, and realizing a positive cycle of cooling and energy saving.

[0018] (2) In this invention, the turbulence blades at both ends of the rotor rotate synchronously with the rotor, which can evenly diffuse the cold air released by the cooling pipe into the inside of the casing to avoid local overheating; at the same time, the layout of the external heat absorption pipe attached to the stator and the internal heat absorption pipe surrounding the rotor allows for more comprehensive heat absorption, reduces heat loss of components, and extends the overall service life of the motor. Furthermore, the cooling fan is directly driven by the drive shaft, without the need for additional power components. Meanwhile, the direction of the cooling fins is adapted to the airflow of the cooling fan, which can efficiently remove the heat from the cooling pipe and further reduce energy consumption.

[0019] (3) In this invention, the inner heat absorption tube is made of non-metallic material to avoid electromagnetic interference with the rotor; the outer heat absorption tube is made of copper tube with insulating coating, which takes into account both thermal conductivity and electrical safety. The drive shaft is supported by bearing and end cover ring, resulting in less rotational friction, lower operating noise and stronger stability, which to a certain extent reduces the energy loss caused by excessive friction. Attached Figure Description

[0020] Figure 1 The appearance structure of the energy-saving motor in this invention Figure 1 .

[0021] Figure 2 The appearance structure of the energy-saving motor in this invention Figure 2 .

[0022] Figure 3 The appearance structure of the energy-saving motor in this invention Figure 3 .

[0023] Figure 4 This is an exploded structural diagram of the energy-saving motor in this invention.

[0024] Figure 5 This is a diagram of the internal structure of the motor in this invention.

[0025] Figure 6 This is a breakdown diagram of the cooling pipeline in this invention.

[0026] Figure 7This is a three-dimensional structural diagram of the cooling pipeline in this invention.

[0027] Figure 8 This is a structural diagram of the core components of the motor in this invention.

[0028] Figure 9 This is a structural diagram of the stator and rotor of the motor in this invention.

[0029] Figure 10 This is an assembly diagram of the motor and industrial fan in this invention.

[0030] The correspondence between the labels and component names in the attached figures is as follows: 100. Housing; 101. Stator; 102. Rotor; 102a. Drive shaft; 102b. Bearing; 102c. Cooling fan; 102d. Baffle blades; 103. End cover; 103a. Support ring; 104. Protective cover; 105. Cooling box; 106. Internal heat absorption pipe; 107. External heat absorption pipe; 108. Heat dissipation pipe; 108a. Output pipe; 108b. Input pipe; 109. Valve; 200. Industrial fan body. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments. The present invention provides the following embodiments.

[0034] Example 1 This embodiment discloses an energy-saving motor that addresses the problems of low heat dissipation efficiency and high energy consumption in traditional motors. It achieves precise cooling and energy-saving operation through a combination of a modular, partitioned heat dissipation structure and a high-efficiency cooling system. The specific structure is as follows: See Figure 1-2This is an external view of the energy-saving motor in this embodiment. The motor includes a housing 100, which is a one-piece die-cast aluminum alloy hollow cylindrical structure. Its inner wall is sandblasted and then coated with a ceramic fiber heat insulation coating. This coating is made of alumina ceramic fibers and a high-temperature resistant organic binder, which can effectively prevent the internal cold energy of the housing from being lost to the outside, thereby improving the energy efficiency ratio of the heat dissipation system. See Figure 8 and... Figure 9 In this embodiment, the housing 100 contains a stator 101, and the stator 101 contains a rotor 102. The stator 101 is composed of a stator core formed by stacking cold-rolled non-oriented silicon steel sheets and a three-phase winding made of oxygen-free copper enameled wire. An air gap is maintained between the inner side of the stator 101 and the rotor 102. The rotor 102 includes a rotor core, a permanent magnet, and a shaft sleeve. The rotor core is also made of stacked cold-rolled silicon steel sheets, and the permanent magnet is a neodymium iron boron permanent magnet, which is embedded in the built-in permanent magnet slot of the rotor core. (See also...) Figure 5-7 In this embodiment, the casing 100 has an independently installed cooling pipeline, filled with a coolant, which is an aqueous solution of ethylene glycol. This coolant possesses excellent low-temperature fluidity and anti-boiling properties. The pipeline is divided into two independent branches: an internal heat-absorbing pipe 106 and an external heat-absorbing pipe 107. These two branches are connected in parallel and can operate independently or in conjunction. The internal heat-absorbing pipe 106 is made of polytetrafluoroethylene (PTFE), which has the characteristics of temperature resistance of -200℃ to 260℃, excellent insulation, and a low coefficient of friction, thus avoiding electromagnetic interference or frictional loss with the rotor 102. The heat pipes 106 are arranged in a multi-circular, meandering pattern around the rotor 102. The inner heat-absorbing pipes 106 are spaced apart from the outer wall of the rotor 102, maintaining a non-contact state throughout. The outer heat-absorbing pipes 107 are made of T2 copper tubes and coated with an aluminum oxide insulating and thermally conductive coating, which ensures heat transfer efficiency and avoids electrical contact with the stator 101 windings. Semi-cylindrical slots are equidistantly opened on the outer side of the stator 101. The outer heat-absorbing pipes 107 fit into the slots of the stator 101 and are arranged in a circumferential, meandering pattern. The slots of the stator 101 are filled with thermally conductive silicone to further enhance heat conduction.

[0035] See Figures 2-8In this embodiment, both ends of the inner heat absorption pipe 106 and the outer heat absorption pipe 107 are equipped with valves 109. The valves 109 are two-position three-way ball valves made of stainless steel, allowing for individual or simultaneous on / off switching of the inner heat absorption pipe 106 and the outer heat absorption pipe 107. This facilitates adjustment of the heat dissipation intensity according to the motor's operating load. One of the valves 109's outlet ends is connected to a heat dissipation pipe 108 via a compression fitting. The heat dissipation pipe 108 is a copper corrugated pipe with rectangular heat dissipation fins integrally formed on its outer surface, and the extension direction of the heat dissipation fins is parallel to... The airflow direction of the cooling fan 102c remains parallel, allowing the airflow to pass vertically through the fin gaps and maximizing the heat dissipation area. The end of the heat dissipation pipe 108 is connected to the input pipe 108b via a quick-connect connector, which is connected to the input end of the cooling box 105. The inlet end of another valve 109 is connected to the output pipe 108a in the same way, and the output pipe 108a is connected to the output end of the cooling box 105. Both the input pipe 108b and the output pipe 108a are fitted with fire-retardant sleeves to improve safety during use.

[0036] See Figure 1 and Figure 5 In this embodiment, a cooling box 105 is bolted to the outside of the housing 100. The cooling box 105 is a sealed 304 stainless steel box, which integrates a miniature centrifugal water pump, a thermoelectric cooler, a temperature control module, and a coolant storage chamber. The miniature centrifugal water pump has a rated voltage of 24VDC, a rated flow rate of 1.5±0.2L / min, and a power consumption of ≤15W. It features low noise and high reliability. The thermoelectric cooler is a TEC1-12706 model. Its cold end is tightly bonded to the coil section of the input pipe 108b through thermal grease, effectively increasing the contact area between the coolant and the cold end. The hot end of the thermoelectric cooler extends to the outside of the box through a through hole in the side wall of the cooling box 105, and an aluminum heat sink is attached to the surface of the hot end. The end of the input pipe 108b is connected to the input end of the water pump through a threaded connector, and the output pipe 108a is connected to the output end of the water pump, forming a closed-loop circulation circuit.

[0037] See Figure 4 and Figure 9In this embodiment, a drive shaft 102a is interference-fitted at the center of the rotor 102. The drive shaft 102a extends outward to both ends of the rotor 102. Both ends of the housing 100 are bolted to end caps 103 made of cast aluminum. A nitrile rubber sealing gasket is placed between the end cap 103 and the housing 100. The drive shaft 102a passes through the central hole of the end cap 103. A TC type skeleton oil seal is installed at the central hole to prevent coolant leakage and dust ingress. Both ends of the drive shaft 102a are fitted with bearings 102b through an transition fit. The bearings 102b are 6206 type deep groove ball bearings. A retainer ring 103a is integrally formed at the center of the inner surface of the end cap 103. The inner diameter of the retainer ring 103a is interference-fitted with the outer diameter of the bearing 102b to provide stable radial support for the drive shaft 102a. Lithium-based grease is filled between the outer ring of the bearing 102b and the retainer ring 103a to reduce rotational friction loss.

[0038] See Figure 3 and Figure 4 In this embodiment, a cooling fan 102c is fixedly connected to the drive shaft 102a. Its air outlet is directly opposite to the central axis of the heat dissipation pipe 108, and it can rotate synchronously with the drive shaft 102a without requiring additional power. The cooling fan 102c is covered with a protective cover 104, which consists of a mesh cover and a stamped steel plate frame. The frame and the end cover 103 are detachably connected by three sets of snap-fit ​​structures. The snap-fits are spring snap-fits for easy cleaning and maintenance. The steel plate frame of the protective cover 104 has grid-shaped heat dissipation holes. The circumferentially evenly distributed blades ensure efficient airflow and prevent foreign objects from contacting the high-speed rotating cooling fan. The two ends of the rotor 102 are fixed with baffle blades 102d by bolts. The baffle blades 102d are arc-shaped aluminum alloy blades that are evenly distributed along the circumference of the rotor end face. When the rotor 102 rotates, they can generate radial airflow, which evenly agitates and diffuses the cold air released from the cooling pipe to the stator, rotor gap and winding ends inside the housing 100, avoiding local temperature differences exceeding 5°C and ensuring a uniform temperature field inside the motor.

[0039] Example 2 This embodiment discloses a portable industrial fan, which uses the energy-saving motor from Embodiment 1 as its core drive source. Combined with a movable and adjustable mechanical structure, it is adapted to the long-term, high-load ventilation needs in industrial scenarios. The specific assembly structure is as follows: See Figure 10This is an assembly diagram of the industrial fan and energy-saving motor in this embodiment. The portable industrial fan includes an industrial fan body 200, an energy-saving motor, a control system, and auxiliary support components. The industrial fan body 200 is a large-diameter axial flow fan structure with three-bladed aerospace-grade aluminum alloy blades. The blades are aerodynamically optimized and swept-back, which can generate high air volume at low speeds. A hub is welded to the center of the blades and connected to the extended end of the drive shaft 102a of the energy-saving motor via a spline.

[0040] The fan cover is a split-type ring-shaped metal mesh cover, consisting of a front cover and a rear cover, both woven from galvanized steel wire. A steel plate motor mounting base is welded to the center of the rear cover. The energy-saving motor is fixed to the mounting base with high-strength bolts. A nitrile rubber shock-absorbing pad is placed between the motor housing 100 and the mounting base to effectively absorb vibrations during motor operation and reduce overall fan noise. A push handle is connected to the outside of the fan cover for easy manual movement of the fan. Furthermore, heavy-duty casters are installed at the bottom of the fan cover, equipped with a double brake device to achieve flexible movement and stable fixation of the fan. The industrial fan body 200 has a counterweight box welded inside the base, with a cast iron counterweight block inside, which lowers the fan's center of gravity and prevents the fan from tipping over under high-angle adjustments or strong wind reaction.

[0041] It is worth noting that the industrial fan body 200 in this embodiment is connected to an external control system control box. The control box contains a motor speed controller, a temperature sensor, a power switch, a digital temperature controller, a relay module, and an overload protection device. The probe of the temperature sensor extends into the housing 100 of the energy-saving motor to monitor the motor temperature in real time. The digital temperature controller can preset a temperature threshold. When the motor temperature exceeds the threshold, the semiconductor cooling chip and the hot-end axial fan in the cooling box 105 are automatically started. When the temperature is low, the cooling chip is automatically turned off, and only the water pump is kept running, realizing intelligent energy-saving control of the heat dissipation system. The overload protection device can cut off the power supply when the motor is overloaded or stalled to protect the motor safety.

[0042] In summary, the workflow of the portable industrial fan and energy-saving motor in this embodiment is as follows: After connecting to a 380V three-phase power supply, the control system starts the energy-saving motor, which drives the fan blades to rotate and generate ventilation airflow. At the same time, the cooling pipes inside the motor automatically start, the water pump runs continuously, and the baffles 102d at both ends of the rotor 102 rotate with the rotor 102, evenly dispersing the cooling capacity of the coolant in the pipes to the inside of the motor, absorbing the operating heat of the stator 101 and the rotor 102. The heat enters the heat dissipation pipe 108 with the coolant, and the cooling fan 102c driven by the drive shaft blows air onto the heat dissipation pipe 108, quickly dissipating the heat through the heat dissipation fins. The coolant is cooled by the semiconductor cooling chip of the cooling box 105 and then flows back to the pipes, forming a closed loop. Compared with traditional portable industrial fans, this fan has lower energy consumption of the drive motor, longer continuous operation time, reduced probability of overheating shutdown, and allows for quick disassembly of components such as the motor protective cover and cooling box valves during maintenance, cleaning of the heat dissipation fins or replacement of the coolant, extending the maintenance cycle and significantly reducing the usage cost and maintenance workload in industrial scenarios.

[0043] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted herein.

Claims

1. An energy-saving motor, comprising a housing (100), wherein a stator (101) is disposed within the housing (100), and a rotor (102) is disposed within the stator (101), characterized in that: The housing (100) is also provided with a cooling pipeline, which includes an inner heat absorption pipe (106) and an outer heat absorption pipe (107). The inner heat absorption pipe (106) is placed outside the rotor (102), and the two are in a non-contact state. The outer heat absorption pipe (107) is placed inside and outside the stator (101), and the two are in a contact state. The housing (100) is equipped with a cooling box (105). Both ends of the cooling pipeline are connected to the cooling box (105) to form an output end and an input end. Both ends of the rotor (102) are fixedly connected with baffle blades (102d). The cold air released by the cooling pipeline is fully diffused in the housing (100) through the baffle blades (102d).

2. The energy-saving motor according to claim 1, characterized in that: The inner heat absorption tube (106) is made of non-metallic material and is arranged in a meandering manner, with the rotor (102) as the center and arranged in a circular shape. The outer heat absorption tube (107) is made of copper tube and is also arranged in a meandering manner, with the stator (101) as the center and arranged in a circular shape.

3. The energy-saving motor according to claim 2, characterized in that: Both ends of the inner heat absorption pipe (106) and the outer heat absorption pipe (107) are connected by valves (109). One valve (109) is connected to a heat dissipation pipe (108), and the end of the heat dissipation pipe (108) is connected to an input pipe (108b). The input pipe (108b) is connected to the input end of the cooling box (105). The other valve (109) is connected to an output pipe (108a), and the output pipe (108a) is connected to the output end of the cooling box (105).

4. The energy-saving motor according to claim 3, characterized in that: The cooling box (105) is equipped with a water pump and a semiconductor refrigeration chip. The input pipe (108b) is coiled inside the cooling box (105). The cold end of the semiconductor refrigeration chip is in contact with the coiled section of the input pipe (108b). The cooling box (105) is provided with a through hole so that the hot end of the semiconductor refrigeration chip can pass through the through hole and face outward. The end of the input pipe (108b) is connected to the input end of the water pump, and the output pipe (108a) is connected to the output end of the water pump.

5. The energy-saving motor according to claim 3, characterized in that: A drive shaft (102a) is fixed at the center of the rotor (102). The drive shaft (102a) extends outward to both ends of the rotor (102). End caps (103) are bolted to both ends of the housing (100), and the drive shaft (102a) extends outward through the end caps (103).

6. The energy-saving motor according to claim 5, characterized in that: The drive shaft (102a) has bearings (102b) fixedly sleeved at both ends, and a support ring (103a) is provided at the center of the inner surface of the end cover (103), and the bearings (102b) are fitted into the support ring (103a).

7. The energy-saving motor according to claim 5, characterized in that: One end of the drive shaft (102a) is fixedly connected to a cooling fan (102c), and the cooling fan (102c) is directly opposite the heat pipe (108). The cooling fan (102c) is covered with a protective cover (104), and the protective cover (104) has heat dissipation holes.

8. The energy-saving motor according to claim 7, characterized in that: The protective cover (104) is detachably connected to the end cap (103) of the housing (100) by a snap fastener. The heat dissipation holes of the protective cover (104) are grid-shaped and distributed in a circular pattern.

9. The energy-saving motor according to claim 7, characterized in that: The outer surface of the heat sink (108) is integrally formed with a number of heat sink fins. The heat sink fins are distributed at equal intervals along the length of the heat sink (108), and the extension direction of the heat sink fins is adapted to the airflow direction of the heat sink fan (102c) to increase the heat dissipation area of ​​the heat sink (108).

10. A portable industrial fan, driven by the energy-saving motor of claim 1, characterized in that: It includes an industrial fan body (200), and the drive end of an energy-saving motor is connected to the center of the fan blades of the industrial fan body (200).

Images