CN210769444U - Direct current draught fan - Google Patents

Abstract

The utility model discloses a direct current draught fan, including the spiral case, the wind wheel, including a motor, an end cap, a controller, and a cover plate, fan housing and radiator fan, the fan housing is installed to the roof of spiral case, the front end housing supporting is installed on the fan housing, radiator fan is located the fan housing the inside and installs in the pivot, set up a plurality of exhaust vents on the side of fan housing, machine controller installs on the rear end cap, the front end housing is equipped with a plurality of first ventilation holes, be equipped with a plurality of second ventilation holes on the rear end cap, it forms and is equipped with first fresh air inlet to leave the clearance between machine controller and the rear end cap, when the motor rotates, cold air then passes through the second ventilation hole in getting into machine controller from first fresh air inlet under radiator fan's the traction, motor body's inside clearance and first. Therefore, the heat of the motor body and the motor controller can be dissipated simultaneously, the heat dissipation effect is good, and the working reliability of the motor is improved.

Description

A direct current induced draft fan

Technical field:

The utility model relates to a direct current induced draft fan.

Background technique:

The existing DC induced draft fan includes a volute, a wind wheel and a motor. A cavity is formed in the volute, an air inlet is arranged in the middle of the bottom wall of the volute, an air outlet is arranged on the side wall of the volute, and an air outlet is arranged in the middle of the top wall of the volute. There is a through hole, the air inlet, the air outlet and the through hole are connected with the cavity, the motor is installed on the volute, the end of the rotating shaft of the motor enters the cavity through the through hole, and the end of the rotating shaft is connected with the wind wheel located in the cavity. Connected, the motor includes a motor body, a cooling fan and a motor controller. The motor body includes a rotating shaft, a motor casing, a stator assembly and a rotor assembly installed in the motor casing, and a front end cover and a rear end installed at both ends of the motor casing. The end cover, the cooling fan is installed on the front cover and the cooling fan is driven by the rotating shaft to rotate, the motor controller is installed on the rear cover, the motor casing is provided with several ventilation holes, and the ventilation holes are located between the stator assembly and the front cover. The DC induced draft fan with this structure has a cooling fan to dissipate heat for the motor body, but since the ventilation holes are located between the stator assembly and the front cover, the heat dissipation effect of the motor body is not ideal, and the motor controller needs to add some aluminum alloy heat dissipation Components are used for auxiliary heat dissipation, which increases the structural complexity and production cost of the product.

Invention content:

The purpose of the utility model is to provide a direct current induced draft fan, which is used to solve the problem that the heat dissipation effect of the motor of the direct current induced draft fan is not good in the prior art.

The purpose of this utility model is to be achieved through the following technical solutions:

A DC induced draft fan includes a volute, a wind wheel, a motor, a wind cover and a cooling fan, the motor includes a motor body and a motor controller, the motor body includes a rotating shaft, a motor casing, and a stator assembly installed in the motor casing , rotor assembly, front end cover and rear end cover installed at both ends of the motor casing, a cavity is formed in the volute, a wind cover is installed on the top wall of the volute, the front end cover is supported on the wind cover, and the end of the motor shaft enters The cavity is connected with the wind wheel located in the cavity, the cooling fan is located in the air hood and is installed on the rotating shaft, the side of the air hood is provided with several air outlet holes, and the motor controller is installed on the rear end cover. In that: the front end cover is provided with a number of first ventilation holes, the rear end cover is provided with a number of second ventilation holes, and there is a gap between the motor controller and the rear end cover to form a first air inlet hole, when the motor rotates , under the traction of the cooling fan, the cold air enters the motor controller from the first air inlet hole, then passes through the second ventilation hole, the inner gap of the motor body and the first ventilation hole, and finally is discharged from the air outlet hole.

The motor controller described above includes a box body and a control board. The box body includes a top plate and a sleeve. The control plate is installed under the top plate. The end caps are connected, and a first air inlet hole is formed in the gap between the end edge of the sleeve and the rear end cap.

The inner diameter D1 of the above-mentioned sleeve is larger than the outer diameter D2 of the motor casing, and the box body and the rear end cover are connected by screws.

The mounting boss is provided with screw holes, and the sleeve above the mounting boss is provided with a hollow slot.

The motor casing is further provided with a plurality of second air inlet holes, and the second air inlet holes are located between the stator iron core and the rear end cover of the stator assembly.

The front end cover and the wind cover are riveted together by rivets.

The rear end cover and the motor casing are riveted together by a buckle clip.

Compared with the prior art, the utility model has the following effects:

1) The utility model includes a volute, a wind wheel, a motor, a wind cover and a cooling fan. The top wall of the volute is provided with a wind cover, the front end cover is supported and installed on the wind cover, and the cooling fan is located in the wind cover and installed on the rotating shaft. , a number of air outlets are arranged on the side of the air hood, the motor controller is installed on the rear end cover, the front end cover is provided with a number of first ventilation holes, and the rear end cover is provided with a number of second ventilation holes. There is a gap between the covers to form a first air inlet hole. When the motor rotates, the cold air enters the motor controller from the first air inlet hole under the traction of the cooling fan, and then passes through the second ventilation hole and the inner gap of the motor body. and the first ventilation hole, and finally exhausted from the air outlet. This air flow dissipates heat to the motor controller and the motor at the same time, reduces the temperature rise of the motor body and the motor controller, improves the working reliability of the motor, and the motor controller box The body does not need to be specially equipped with a heat dissipation structure, which simplifies the box structure and reduces product costs;

1) Other advantages of the present invention are described in detail in the embodiment section.

Description of drawings:

1 is a schematic structural diagram of a DC induced draft fan provided by an embodiment of the present invention;

Figure 2 is a top view of the DC induced draft fan;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is the B-B sectional view of Fig. 2;

Figure 5 is an exploded view of the DC induced draft fan;

Figure 6 is an exploded view of the motor in the DC induced draft fan;

Figure 7 is an exploded view of the motor controller in the DC induced draft fan.

Detailed ways:

The present utility model will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

As shown in FIG. 1 to FIG. 7 , this embodiment provides a DC induced draft fan, including a volute 1, a wind wheel 15, a motor 20, a wind cover 31 and a cooling fan 32. The motor 20 includes a motor body 2 and a motor control 4, the motor body 2 includes a rotating shaft 21, a motor casing 22, a stator assembly 23 installed in the motor casing 22, a rotor assembly 24, a front end cover 25 and a rear end cover 26 installed at both ends of the motor casing 22, the volute 1 includes a top wall 16 and a bottom wall 12, a cavity 11 is formed in the volute 1, a wind cover 31 is installed on the top wall 16 of the volute 1, the front end cover 25 is supported and installed on the wind cover 31, and the end of the rotating shaft 21 of the motor 20 It enters the cavity 11 and is connected with the wind wheel 15 located in the cavity 11. The cooling fan 32 is located in the wind cover 31 and is installed on the rotating shaft 21. The side of the wind cover 31 is provided with several air outlet holes 310. The motor controller 4 is installed on the rear end cover 26, and is characterized in that: the front end cover 25 is provided with a number of first ventilation holes 251, the rear end cover 26 is provided with a number of second ventilation holes 261, the motor controller 4 and the rear end cover 26 There is a gap therebetween to form a first air inlet hole 41. When the motor rotates, the cold air enters the motor controller 4 from the first air inlet hole 41 under the traction of the cooling fan 32 and then passes through the second ventilation hole 261, the motor The inner gap 232 of the main body 2 and the first ventilation hole 251 are finally discharged from the air outlet hole 310 . Such airflow heat dissipation simultaneously dissipates heat to the motor controller and the motor, reduces the temperature rise of the motor body and the motor controller, improves the working reliability of the motor, and the motor controller box body does not need to be specially provided with a heat dissipation structure, which simplifies the box body structure and reduces the Product Cost.

The above-mentioned stator assembly 23 includes several stator windings 231 and stator cores 230 , and the internal gap 232 of the motor body 2 includes the gap between two adjacent stator windings and the gap between the stator assembly 23 and the rotor assembly 24 . .

The motor controller 4 described above includes a box body 42 and a control board 43, the box body 42 includes a top plate 421 and a sleeve 423, the control plate 43 is installed under the top plate 421, and the end edge of the sleeve 423 extends toward the rear end cover 26. The mounting boss 422 is protruded, and the mounting boss 422 is connected with the rear end cover 26 , and a first air inlet hole 41 is formed in the gap between the end edge of the sleeve 423 and the rear end cover 26 . There is no need to add some aluminum alloy heat dissipation components on the box body 42, which simplifies the structure and reduces the production cost.

The inner diameter D1 of the above-mentioned sleeve 423 is larger than the outer diameter D2 of the motor casing 22, and the box body 42 and the rear end cover 26 are connected by screws 28. The inner diameter D1 of the sleeve 423 is larger than the outer diameter D2 of the motor casing 22. When the cold air flows into the first air inlet hole 41, a part of the airflow flows to the top plate 421 and the control board 43, and the control board 43 is rapidly dissipated.

The mounting boss 422 is provided with screw holes, and the sleeve 423 above the mounting boss 422 is provided with a recess 4231 to facilitate screw installation.

The motor casing 22 is further provided with a plurality of second air inlet holes 221 , and the second air inlet holes 221 are located between the stator iron core of the stator assembly 23 and the rear end cover 26 . When the motor rotates, under the traction of the cooling fan 32, the cold air enters the motor controller 4 from the second air inlet hole 221, then passes through the second ventilation hole 261, the inner gap 232 of the motor body 2 and the first ventilation hole 251, and finally exits the motor controller 4. The air outlet 310 is discharged to form a second heat dissipation airflow channel, which is more conducive to accelerating the heat dissipation of the motor body 20 and improving the heat dissipation effect.

The front end cover 25 and the wind cover 31 are riveted together by rivets, and the rear end cover 26 and the motor casing 22 are riveted together by a clip 27, which is convenient for installation.

The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention shall be The replacement modes that are equivalent are all included in the protection scope of the present invention.

Claims (7)

1. A DC induced draft fan, comprising a volute (1), a wind wheel (15), a motor (20), a wind hood (31) and a cooling fan (32), the motor (20) comprising a motor body (2) and a motor controller (4), the motor body (2) includes a rotating shaft (21), a motor casing (22), a stator assembly (23) installed in the motor casing (22), a rotor assembly (24), The front end cover (25) and the rear end cover (26) at both ends of the motor casing (22), a cavity (11) is formed in the volute (1), and a wind cover (16) is installed on the top wall (16) of the volute (1). 31), the front end cover (25) is supported and installed on the wind cover (31), and the end of the rotating shaft (21) of the motor (20) enters the cavity (11) and is connected with the wind wheel (15) located in the cavity (11). ) are connected, the cooling fan (32) is located in the hood (31) and is installed on the rotating shaft (21), the side of the hood (31) is provided with several air outlet holes (310), and the motor controller (4) is installed in the The rear end cover (26) is characterized in that: the front end cover (25) is provided with a plurality of first ventilation holes (251), and the rear end cover (26) is provided with a plurality of second ventilation holes (261), and the motor controls There is a gap between the fan (4) and the rear end cover (26) to form a first air inlet hole (41). 41) Enter the motor controller (4) and then pass through the second ventilation hole (261), the inner gap (232) of the motor body (2) and the first ventilation hole (251), and finally discharge from the air outlet (310). 2 . The DC induced draft fan according to claim 1 , wherein the motor controller ( 4 ) comprises a box body ( 42 ) and a control board ( 43 ), and the box body ( 42 ) comprises a top plate ( 421 ). 3 . and the sleeve (423), the control board (43) is installed under the top plate (421), the end edge of the sleeve (423) protrudes from the mounting boss (422) toward the rear end cover (26), and the mounting boss ( 422) is connected to the rear end cover (26), and a first air inlet hole (41) is formed in the gap between the end edge of the sleeve (423) and the rear end cover (26). 3. A direct current induced draft fan according to claim 2, characterized in that: the inner diameter D1 of the sleeve (423) is larger than the outer diameter D2 of the motor casing (22), and the box body (42) and the rear end cover (26) are connected by screws (28). 4. A direct current induced draft fan according to claim 2, characterized in that: screw holes are provided on the mounting boss (422), and a recess (4231) is provided at the sleeve (423) above the mounting boss (422). ). 5. A DC induced draft fan according to claim 1 or 2 or 3 or 4, characterized in that: the motor casing (22) is further provided with a number of second air inlet holes (221), and the second air inlet The hole (221) is located between the stator core of the stator assembly (23) and the rear end cover (26). 6 . The DC induced draft fan according to claim 5 , wherein the front end cover ( 25 ) and the wind cover ( 31 ) are riveted together by rivets. 7 . 7 . The DC induced draft fan according to claim 6 , wherein the rear end cover ( 26 ) and the motor casing ( 22 ) are riveted together by a clip ( 27 ). 8 .

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