Sensorless DC Brushless Motor and Its Applications

Abstract

The present invention discloses a sensorless DC brushless motor and its application, which relates to the technical field of motors. The present invention includes: a bottom plate, on which a stator is fixedly connected, a rotating shaft is rotatably penetrated through the stator, and a rotor rotatably sleeved on the bottom plate is fixedly connected to the rotating shaft; a heat dissipation component, including a ring frame detachably sleeved on the bottom plate, a spiral heat conduction tube is fixedly wound on the side wall of the ring frame, a conical frame fixedly sleeved on the rotating shaft is constructed at the end of the rotor, a water storage cover covering the conical frame is detachably connected to the end of the ring frame, and the spiral heat conduction tube is communicated with the water storage cover. By connecting a ring frame sleeved on the rotor to the bottom plate, the present invention can use the spiral heat conduction tube to absorb the heat generated inside the motor, and use the communication of the water storage cover to dissipate the heat at the heat dissipation fins, forming water-cooled heat dissipation, and cooperating with the evaporation heat dissipation of the cooling component for double heat dissipation, with better effect.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a sensorless direct current brushless motor and its applications. Background Art

[0002] With the development of technology, sensorless brushless motors have been widely used in various devices due to their advantages such as high efficiency and low noise.

[0003] However, traditional brushless motors have some deficiencies in heat dissipation and cooling. They only rely on the hollowing of the motor housing to achieve natural air-cooled heat dissipation, and the heat dissipation efficiency is relatively low. Especially during high-load and long-term operation, the overheating problem of the motor will seriously affect its performance and lifespan.

[0004] In addition, for some special applications, such as ice crushers and ice shavers, the motor needs to have a greater power output, and high-power motors require good heat dissipation capabilities and cooling effects to handle the large amount of heat generated during the ice crushing process.

[0005] Therefore, the present invention proposes a sensorless direct current brushless motor and its applications. Summary of the Invention

[0006] The purpose of the present invention is to provide a sensorless direct current brushless motor and its applications to solve the problems in the above background art.

[0007] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0008] A sensorless direct current brushless motor, comprising:

[0009] A bottom plate, on which a stator is fixedly connected. A rotating shaft is rotatably penetrated through the stator, and a rotor rotatably sleeved on the bottom plate is fixedly connected to the rotating shaft.

[0010] A heat dissipation assembly, including an annular frame detachably sleeved on the bottom plate. A spiral heat conduction tube is fixedly wound on the side wall of the annular frame. A conical frame fixedly sleeved on the rotating shaft is constructed at the end of the rotor. A water storage cover covering the conical frame is detachably connected to the end of the annular frame. The spiral heat conduction tube is communicated with the water storage cover. An installation circular plate rotatably sleeved on the rotating shaft is connected to the outside of the water storage cover. A plurality of heat dissipation fins inserted into the water storage cover are constructed in a circumferential array on the installation circular plate.

[0011] A flow-pushing member, including a plurality of elastic convex pieces constructed on the inner side of the water storage cover. A convex plate is constructed on the outside of the conical frame. When the conical frame rotates, the convex plate abuts against the elastic convex pieces and moves towards the inside of the water storage cover in sequence. A wave block located inside the water storage cover is constructed on the elastic convex piece.

[0012] The cooling component includes a sponge ring sheet sleeved on a ring frame, and a plurality of capillary water suction pipes fixed to the inner side of the sponge ring sheet and inserted into a spiral heat conduction pipe.

[0013] Further, one end of the bottom plate facing the rotor is configured with a stepped groove, the ring frame is sleeved on the stepped groove, two convex blocks are configured at one end edge of the ring frame, two connecting plates opposite to the convex blocks are configured on the circumferential side of the bottom plate, and fixing bolts penetrating through the connecting plates are threadedly connected to the convex blocks.

[0014] Further, a plurality of ventilation openings are arranged in an array along the circumference on one side of the bottom plate, a plurality of trapezoidal perforations are arranged in an array on the conical frame, and a wind-cutting inclined surface is configured on one side of the trapezoidal perforation.

[0015] Further, the heat sink includes a first sheet body and a second sheet body. A rectangular opening is configured on the first sheet body and is arranged away from the mounting circular plate. A water passing opening is configured on the second sheet body and is arranged close to the mounting circular plate. A plurality of the first sheet bodies and the second sheet bodies are arranged alternately in the water storage cover and divide the inside of the water storage cover into an annular serpentine cavity.

[0016] Further, two blocking blocks are installed in the water storage cover between two adjacent heat sinks. Two diversion pipes respectively communicating with the rectangular opening and the water passing opening are installed through the two blocking blocks, and the other ends of the two diversion pipes are respectively communicated with two ends of the spiral heat conduction pipe.

[0017] Further, a connecting block is fixedly sleeved on one of the diversion pipes, a one-way valve communicated with the diversion pipe is installed on the connecting block, and a water injection pipe is communicated with the one-way valve.

[0018] Further, four mounting openings are configured on one side of the water storage cover facing the conical frame. The elastic convex piece includes an elastic metal sheet fixedly connected in the mounting opening. A convex ball is configured through the middle of the elastic metal sheet, and the convex ball is connected to the bottom of the fluctuation block.

[0019] Further, an arc angle is configured at the upper end of the convex plate, and the cross section of the fluctuation block is triangular and the inclined surface is arranged facing the heat sink.

[0020] Further, a plurality of grooves are arranged in an array on the spiral heat conduction pipe. The capillary water suction pipe includes a convex column fixedly connected to the inner side of the sponge ring sheet and inserted into the groove. A needle pipe inserted into the spiral heat conduction pipe is configured in the convex column. One end of the needle pipe is connected with a conical capillary sheet located in the convex column, and the conical capillary sheet is connected with the sponge ring sheet.

[0021] The present invention also discloses an application of the above-mentioned sensorless DC brushless motor, which is mainly used for an ice crusher and can also be applied to other devices that require a high-power motor, such as an ice shaver and other devices.

[0022] The beneficial effects of the present invention are as follows:

[0023] By connecting a ring frame sleeved on the rotor to the bottom plate in the present invention, the heat generated inside the motor can be absorbed by the spiral heat conduction tube, and the heat can be dissipated at the heat sink through the connection of the water storage cover, forming water-cooled heat dissipation. Combined with the evaporation heat dissipation of the cooling component, the dual heat dissipation has a better effect.

[0024] By utilizing the rotation of the rotor in the present invention, a linkage can be formed with the flow-pushing member to push the water in the water storage cover, promoting the flow of water between the spiral heat conduction tube and the water storage cover and enhancing the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the three-dimensional structure diagram of the present invention;

[0026] Figure 2 is the half-sectional three-dimensional structure diagram of the present invention;

[0027] Figure 3 is the three-dimensional structure diagram of the stator and rotor of the present invention;

[0028] Figure 4 is the three-dimensional structure diagram of the heat dissipation component of the present invention;

[0029] Figure 5 is the present invention Figure 4 in the half-sectional three-dimensional structure diagram;

[0030] Figure 6 is the three-dimensional structure diagram of the spiral heat conduction tube of the present invention;

[0031] Figure 7 is the three-dimensional structure diagram of the heat sink of the present invention;

[0032] Figure 8 is the three-dimensional structure diagram of the flow-pushing member of the present invention;

[0033] Figure 9 is the three-dimensional structure diagram of the capillary water absorption tube of the present invention;

[0034] Figure 10 is the present invention Figure 9 in the half-sectional three-dimensional structure diagram.

[0035] Reference numerals: 1, bottom plate; 101, stator; 102, rotating shaft; 103, rotor; 104, conical frame; 105, stepped groove; 106, connecting plate; 107, ventilation port; 108, trapezoidal perforation; 109, wind-cutting inclined surface; 2, heat dissipation assembly; 201, ring frame; 2011, bump; 2012, fixing bolt; 202, spiral heat conduction tube; 2021, groove; 203, water storage cover; 2031, annular serpentine cavity; 2032, installation port; 204, installation round plate; 205, heat sink; 2051, sheet body one; 2052, sheet body two; 2053, rectangular opening; 2054, water passing port; 206, plugging block; 207, diversion tube; 2071, connecting block; 2072, one-way valve; 2073, water injection tube; 3, flow pushing member; 301, elastic tab; 3011, elastic metal sheet; 3012, convex ball; 302, convex plate; 3021, arc angle; 303, fluctuation block; 4, cooling assembly; 401, sponge ring sheet; 402, capillary water absorption tube; 4021, convex column; 4022, syringe; 4023, conical capillary sheet. Detailed implementation manners

[0036] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0037] As Figures 1-6 shown, a sensorless DC brushless motor proposed in an embodiment of the present invention includes:

[0038] A bottom plate 1, on which a stator 101 is fixedly connected. A rotating shaft 102 is rotatably penetrated and installed on the stator 101. A rotor 103 that is rotatably sleeved on the bottom plate 1 is fixedly connected to the rotating shaft 102. The bottom plate 1 is a positioning component of the entire motor. The stator 101 is fixedly connected to the central part of the bottom plate 1. The rotating shaft 102 is rotatably installed on the bottom plate 1 and rotatably penetrates the stator 101. At the same time, the other end of the rotating shaft 102 is connected to the rotor 103. The rotor 103 is sleeved on the circumferential side of the bottom plate 1 and forms an annular corresponding relationship with the stator 101;

[0039] The heat dissipation component 2 includes an annular frame 201 detachably sleeved on the bottom plate 1. The annular frame 201 is suspended outside the rotor 103 and does not contact the rotor 103. A spiral heat conduction tube 202 is fixedly wound on the side wall of the annular frame 201. The spiral heat conduction tube 202 is wound on the annular frame 201 and penetrates its side wall, that is, a part of the spiral heat conduction tube 202 contacts the outside of the annular frame 201, and the other part is located between the annular frame 201 and the rotor 103, which is convenient for absorbing the heat generated inside the motor. A conical frame 104 fixedly sleeved on the rotating shaft 102 is constructed at the end of the rotor 103. A water storage cover 203 covering the conical frame 104 is detachably connected to the end of the annular frame 201. The water storage cover 203 includes a conical plate, and an annular conical cavity is constructed inside the conical plate. The spiral heat conduction tube 202 is communicated with the water storage cover 203, that is, the spiral heat conduction tube 202 is communicated with the annular conical cavity, and water can be injected into it so that the water can flow in the water storage cover 203 and the annular conical cavity. An installation circular plate 204 rotatably sleeved on the rotating shaft 102 is connected to the outside of the water storage cover 203. A plurality of heat dissipation fins 205 inserted into the water storage cover 203 are circumferentially arrayed on the installation circular plate 204. The installation circular plate 204 is fixedly connected to the outside of the water storage cover 203, and a bearing is installed at its center and sleeved on the rotating shaft 102. The installation circular plate 204 and the heat dissipation fins 205 are both made of metal copper, which can effectively improve the heat dissipation efficiency. The heat dissipation fins 205 are circumferentially arrayed and inserted into the annular conical cavity of the water storage cover 203. The heat dissipation component 2 absorbs the heat generated during the operation of the motor inside through the annular frame 201 and the spiral heat conduction tube 202, then conducts it into the water therein, and then gradually conducts the heat into the water storage cover 203 by using the heat conduction characteristics of the water, and then dissipates the heat towards the installation circular plate 204 and the outside through the heat dissipation fins 205 in the water storage cover 203, so as to realize the water cooling heat dissipation operation of the motor. Compared with the natural air cooling heat dissipation of the traditional motor, the water cooling heat dissipation is more efficient and guarantees the service life of the motor;

[0040] The flow-pushing member 3 includes a plurality of elastic tabs 301 constructed inside the water storage cover 203. The elastic tabs 301 are constructed on the wall plate inside the water storage cover 203. The recessed part thereof is in contact with the annular conical cavity of the water storage cover 203, and the protruding part thereof is arranged towards the conical frame 104. A convex plate 302 is constructed on the outer side of the conical frame 104. When the conical frame 104 rotates, the convex plate 302 sequentially abuts against the elastic tabs 301 to move them towards the inside of the water storage cover 203. A wave block 303 located inside the water storage cover 203 is constructed on the elastic tab 301. It should be noted that the wave block 303 is slidably arranged between two heat dissipation fins 205. When the rotor 103 rotates, the convex plate 302 will rotate accordingly and gradually abut against the protruding parts of each elastic tab 301, so as to make the elastic tab 301 abut against the wave block 303 to move inside the water storage cover 203 and squeeze the water therein to flow. Repeating this process can gradually increase the water flow speed, promote the flow of water between the spiral heat conduction tube 202 and the water storage cover 203, make the water flow carry heat and rotate rapidly, and enhance the heat dissipation effect;

[0041] The cooling assembly 4 includes a sponge ring piece 401 sleeved on the ring frame 201. A plurality of capillary water absorption tubes 402 inserted into the spiral heat conduction tube 202 are fixedly connected to the inner side of the sponge ring piece 401. The capillary water absorption tubes 402 are provided to slowly suck out the water in the spiral heat conduction tube 202, and then use the sponge ring piece 401 to penetrate the water to a larger range, so that the water absorbing heat is laid on the surface of the sponge ring piece 401 and contacts the air, accelerating the evaporation of water. Using the principle of evaporation refrigeration to reduce the overall temperature of the ring frame 201, achieving a cooling effect. Cooperating with water-cooled heat dissipation, the double-layer heat dissipation effect can ensure the long-term use of the motor and guarantee the service life of the motor.

[0042] As Figures 2-3 shown, the installation structure of the ring frame 201 of the present invention is disclosed to realize the disassembly and replacement of the whole ring frame 201, increasing convenience. One end of the bottom plate 1 facing the rotor 103 is constructed with a stepped groove 105, and the ring frame 201 is sleeved on the stepped groove 105. The stepped groove 105 can position the installation of the ring frame 201, facilitating the sleeving of the ring frame 201 on the bottom plate 1 and fixing the shape of the ring frame 201 to prevent it from deforming and contacting the rotor 103, resulting in friction of the rotor 103 and thus reducing power, increasing safety. Two convex blocks 2011 are constructed at the edge of one end of the ring frame 201, and two connecting plates 106 opposite to the convex blocks 2011 are constructed on the circumferential side of the bottom plate 1. A fixing bolt 2012 penetrating the connecting plate 106 is threadedly connected to the convex block 2011. The connection between the convex block 2011 and the connecting plate 106 is realized by using the fixing bolt 2012, so as to facilitate the detachment of the ring frame 201 from the motor for maintenance and replacement, increasing the convenience of the device.

[0043] As Figures 2-3As shown, the air-cooling heat dissipation structure of the motor of the present invention is disclosed, which is used in combination with the water-cooling heat dissipation structure, and the double heat dissipation effect is improved. A plurality of vents 107 are arranged in an array along the circumference on one side of the bottom plate 1, and a plurality of trapezoidal perforations 108 are arranged in an array on the conical frame 104. A wind-cutting inclined surface 109 is arranged on one side of the trapezoidal perforations 108. The trapezoidal perforations 108 arranged on the surface of the conical frame 104 are arranged around the rotating shaft 102. When the rotor 103 rotates, the trapezoidal perforations 108 and the wind-cutting inclined surface 109 therein will be driven to form a spiral conflict with the air in the motor, so that The air forms a reverse spiral airflow inside the rotor 103, which causes the air to be blown out quickly from the vent 107. The rotor 103 will generate negative pressure due to the outflow of gas, thereby drawing in external air from the vent 107. This cycle can form an air inflow and outflow cycle, so that the airflow can bring the heat inside the motor out of the motor, thereby improving the heat dissipation effect. Compared with traditional natural heat dissipation, it is more efficient, and combined with the water cooling between the spiral heat pipe 202 in the heat dissipation component 2 and the water storage cover 203, the double cooperation can effectively improve the heat dissipation efficiency.

[0044] like Figure 7 As shown, the specific structure of the heat sink 205 of the present invention is disclosed, which increases the flow distance of water flow, improves the contact area between water flow and the heat sink 205, and ensures the heat dissipation efficiency. The heat sink 205 includes a sheet body 1 2051 and a sheet body 2052. The sheet body 1 2051 is configured with a rectangular opening 2053 arranged away from the mounting circular plate 204, and the sheet body 2052 is configured with a water opening 2054 arranged close to the mounting circular plate 204. A plurality of sheet bodies 1 2051 and sheet bodies 2052 are staggeredly arranged in the water storage cover 203, and the water storage cover 203 is divided into annular serpentine cavities. 2031, sheet one 2051 and sheet two 2052 are staggered, and the rectangular openings 2053 and water openings 2054 thereon are also staggered, so as to form an annular serpentine cavity 2031 in the water storage cover 203, so that water will not flow away too quickly when flowing therein, and will stay in the annular serpentine cavity 2031 for a longer time. Compared with direct flow, the curved flowing water can better contact the heat sink 205, and at the same time increase the contact area with the heat sink 205, thereby ensuring that the heat sink 205 can smoothly dissipate the heat in the water to the surrounding air, thereby ensuring the heat dissipation efficiency.

[0045] like Figures 4-6As shown, the connection between the water storage cover 203 and the spiral heat conduction tube 202 of the present invention is disclosed. Two blocking blocks 206 are installed in the water storage cover 203 between two adjacent heat dissipation fins 205. Through holes are formed in the two blocking blocks 206 for installing diversion tubes 207 respectively connected to the rectangular opening 2053 and the water passing opening 2054. The other ends of the two diversion tubes 207 are respectively connected to both ends of the spiral heat conduction tube 202. By setting the two blocking blocks 206, two adjacent heat dissipation fins 205 can be blocked, that is, the rectangular opening 2053 and the water passing opening 2054 on the two heat dissipation fins 205 are blocked, and the spiral heat conduction tube 202 is connected to the rectangular opening 2053 and the water passing opening 2054 by using the diversion tubes 207, so as to form a single-channel circulating flow, increase the circulating path length of the water flow, and improve the heat absorption effect of the water flow.

[0046] As Figure 6 shown, the water supply structure of the spiral heat conduction tube 202 of the present invention is disclosed to ensure that the water flow in the water-cooled heat dissipation structure is always sufficient. A connection block 2071 is fixedly sleeved on one of the diversion tubes 207, and a one-way valve 2072 connected to the diversion tube 207 is installed on the connection block 2071. A water injection pipe 2073 is connected to the one-way valve 2072. It should be noted that the capillary water absorption pipe 402 in the cooling assembly 4 can gradually suck out the water flow in the spiral heat conduction tube 202 and evaporate it by using the sponge ring 401. The water injection pipe 2073 can be connected to an external water source. For example, a bottled water is inverted on the water injection pipe 2073, and the water's own gravity is used to gradually squeeze the one-way valve 2072 into the diversion tube 207. The one-way valve 2072 is used to prevent water from flowing back, replenish water sources for the spiral heat conduction tube 202 and the water storage cover 203, and ensure the smooth progress of water-cooled heat dissipation. At the same time, the water injection pipe 2073 continuously replenishes low-temperature water sources, while the cooling assembly 4 continuously consumes the water sources for heat absorption, so that the water sources therein can be continuously updated, forming a heat dissipation structure for evaporating water sources, further improving the heat dissipation capacity of the motor, and cooperating with water-cooled circulating heat dissipation and air-cooled heat dissipation, the three are combined to enhance the heat dissipation effect.

[0047] As Figure 5 and Figure 8As shown, the specific structure of the elastic convex piece 301 of the present invention is disclosed, so that the rotation of the rotor 103 becomes the driving force to ensure that the water in the water storage cover 203 can flow. The water storage cover 203 is configured with four installation openings 2032 on one side facing the conical frame 104. The elastic convex piece 301 includes an elastic metal sheet 3011 fixedly connected to the installation opening 2032. A convex ball 3012 is configured to penetrate the middle of the elastic metal sheet 3011. The convex ball 3012 is connected to the bottom of the wave block 303. The elastic metal sheet 3011 is made of spring steel, and the metal material is more durable. , and has a higher degree of tensile resistance, can effectively bear the resistance of the convex plate 302 to the convex ball 3012, and at the same time has its own elasticity, can automatically rebound when the convex plate 302 passes over the convex ball 3012, so as to drive the fluctuation block 303 to form a reciprocating movement in the water storage cover 203, the convex ball 3012 is constructed in the middle of the elastic metal sheet 3011, and its end located in the water storage cover 203 is connected to the fluctuation block 303, the fluctuation block 303 and the convex ball 3012 have fewer connection parts, and the fluctuation block 303 is made of rubber material, which is elastic. When the water flow is pushed to move, it will be subjected to the reaction force of the water flow itself, so that the connection between the wave block 303 and the convex ball 3012 is deflected. It should be noted that the wave block 303 is arranged between two adjacent heat sinks 205, and a cavity is constructed between the two heat sinks 205, and is connected to the cavity between other heat sinks 205 through the rectangular opening 2053 and the water opening 2054. When the wave block 303 squeezes the cavity, it will drive the water flow therein to squeeze and flow, and the rotation direction of the rotor 103 is the same for a period of time ... Squeezing different wave blocks 303 will squeeze the water flow in turn and reset it. The pressure of the water flow will be deflected due to the squeezing order of the wave blocks 303, so that the reaction force is used to push the wave blocks 303 to form a deflected reset, that is, when the wave blocks 303 move up and reset, they will be deflected to a certain extent by the reaction force of the water, so that the water flow will flow in the same direction of the deflection. Under the action of the rapid rotation of the rotor 103, the convex plate 302 reciprocates against the convex ball 3012, so that the wave block 303 moves back and forth rapidly, thereby squeezing the water flow to flow faster and faster, thereby increasing the heat dissipation effect.

[0048] like Figure 3 and Figure 8As shown, the specific structure of the fluctuation block 303 of the present invention is disclosed, making it easier to push the water flow when the fluctuation block 303 moves. An arc angle 3021 is constructed at the upper end of the convex plate 302. The cross-section of the fluctuation block 303 is triangular and the inclined surface is arranged towards the heat sink 205. The setting of the arc angle 3021 is used to reduce the collision loss to the convex ball 3012 and increase the service life. It should be noted that the inclined surface of the fluctuation block 303 faces the rotation direction of the rotor 103, and the triangular inclined surface provided on the fluctuation block 303 can push the water flow towards the rotation direction of the rotor 103 during the reciprocating movement, so as to accelerate the water flow and improve the heat dissipation effect.

[0049] As Figures 6-10 As shown, the specific structure of the capillary water absorption tube 402 of the present invention is disclosed to ensure the water absorption effect. A plurality of grooves 2021 are arrayed and constructed on the spiral heat conduction tube 202. The capillary water absorption tube 402 includes a convex column 4021 fixedly connected to the inside of the sponge ring 401 and inserted into the groove 2021. A needle tube 4022 inserted into the spiral heat conduction tube 202 is constructed inside the convex column 4021. One end of the needle tube 4022 is connected with a conical capillary sheet 4023 located inside the convex column 4021. The conical capillary sheet 4023 is connected to the sponge ring 401. It should be noted that the setting of the groove 2021 and the convex column 4021 can facilitate the detachment and replacement of the convex column 4021, increasing convenience. The conical capillary sheet 4023 is made of cotton wool material, which can absorb water autonomously by capillary action, so as to suck the water flow in the needle tube 4022 onto the sponge ring 401. Without power drive, it relies on itself to gradually diffuse the moisture. While ensuring the slow dissipation of moisture, it can also quickly evaporate the precipitated moisture, thus forming an evaporation cooling effect. Cooperating with water-cooled heat dissipation and the air-cooled heat dissipation of the motor itself, the triple heat dissipation effect is stronger.

[0050] The present invention also discloses the application of the above-mentioned sensorless DC brushless motor, which is mainly used for ice crushers and can also be applied to other equipment that requires high-power motors, such as ice shavers and other equipment.

[0051] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Sensorless DC brushless motor, characterized in that, Including: A bottom plate (1), on which a stator (101) is fixedly connected. A rotating shaft (102) is rotatably installed through the stator (101). A rotor (103) that is rotatably sleeved on the bottom plate (1) is fixedly connected to the rotating shaft (102); A heat dissipation component (2), including an annular frame (201) detachably sleeved on the bottom plate (1). A spiral heat conduction tube (202) is fixedly wound on the side wall of the annular frame (201). A conical frame (104) fixedly sleeved on the rotating shaft (102) is constructed at the end of the rotor (103). A water storage cover (203) covering the conical frame (104) is detachably connected to the end of the annular frame (201). The spiral heat conduction tube (202) is communicated with the water storage cover (203). An installation circular plate (204) rotatably sleeved on the rotating shaft (102) is connected to the outside of the water storage cover (203). A plurality of heat dissipation fins (205) inserted into the water storage cover (203) are constructed in a circumferential array on the installation circular plate (204); A flow pushing component (3), including a plurality of elastic convex pieces (301) constructed on the inner side of the water storage cover (203). A convex plate (302) is constructed on the outside of the conical frame (104). When the conical frame (104) rotates, the convex plate (302) sequentially contacts the elastic convex pieces (301) and forces the elastic convex pieces (301) to move towards the inside of the water storage cover (203). A wave block (303) located inside the water storage cover (203) is constructed on the elastic convex piece (301); A cooling component (4), including a sponge ring piece (401) sleeved on the annular frame (201). A plurality of capillary water absorption tubes (402) inserted into the spiral heat conduction tube (202) are fixedly connected to the inner side of the sponge ring piece (401); The heat dissipation fin (205) includes a first sheet body (2051) and a second sheet body (2052). A rectangular opening (2053) is constructed on the first sheet body (2051) and is arranged away from the installation circular plate (204). A water passing opening (2054) is constructed on the second sheet body (2052) and is arranged close to the installation circular plate (204). A plurality of the first sheet bodies (2051) and the second sheet bodies (2052) are staggered and arranged inside the water storage cover (203), and the inside of the water storage cover (203) is divided into an annular serpentine cavity (2031); Two blocking blocks (206) located between two adjacent heat dissipation fins (205) are installed inside the water storage cover (203). A diversion pipe (207) respectively communicating with the rectangular opening (2053) and the water passing opening (2054) is installed through the two blocking blocks (206). The other ends of the two diversion pipes (207) are respectively communicated with both ends of the spiral heat conduction tube (202); One side of the water storage cover (203) facing the conical frame (104) is provided with four mounting openings (2032). The elastic tab (301) includes an elastic metal sheet (3011) fixedly connected in the mounting opening (2032). A convex ball (3012) is formed through the middle of the elastic metal sheet (3011). The convex ball (3012) is connected to the bottom of the wave block (303).

2. The sensorless DC brushless motor according to claim 1, wherein One end of the bottom plate (1) facing the rotor (103) is provided with a stepped groove (105). The ring frame (201) is sleeved on the stepped groove (105). Two convex blocks (2011) are formed at one end edge of the ring frame (201). Two connecting plates (106) opposite to the convex blocks (2011) are formed on the circumferential side of the bottom plate (1). A fixing bolt (2012) passing through the connecting plate (106) is threadedly connected to the convex block (2011).

3. The sensorless DC brushless motor according to claim 1, characterized in that, A plurality of ventilation openings (107) are formed on one side of the bottom plate (1) in a circumferential array. A plurality of trapezoidal perforations (108) are formed on the conical frame (104) in an array. A wind-cutting inclined surface (109) is formed on one side of the trapezoidal perforation (108).

4. The sensorless DC brushless motor according to claim 1, wherein A connecting block (2071) is fixedly sleeved on one of the guide pipes (207). A one-way valve (2072) communicated with the guide pipe (207) is installed on the connecting block (2071). A water injection pipe (2073) is communicated with the one-way valve (2072).

5. The sensorless DC brushless motor according to claim 1, wherein The upper end of the convex plate (302) is provided with an arc angle (3021). The cross section of the wave block (303) is triangular and the inclined surface faces the heat sink (205).

6. The sensorless DC brushless motor according to claim 1, wherein, A plurality of grooves (2021) are formed on the spiral heat conduction pipe (202) in an array. The capillary water absorption pipe (402) includes a convex column (4021) fixedly connected to the inner side of the sponge ring piece (401) and inserted into the groove (2021). A needle tube (4022) inserted into the spiral heat conduction pipe (202) is formed in the convex column (4021). One end of the needle tube (4022) is connected with a conical capillary sheet (4023) located in the convex column (4021). The conical capillary sheet (4023) is connected with the sponge ring piece (401).

7. A sensorless DC brushless motor according to any one of claims 1-6, characterized in that, Applied to an ice crusher.

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