CN215521330U - Motor support, fan system and range hood - Google Patents

Abstract

The utility model discloses a motor bracket, which is characterized in that: the motor support is the hollow tube-shape of both ends open-ended, one of them one end of motor support is formed with annular first fixed part for be connected fixedly with outside first installation basis, the other end that the motor support is relative is formed with annular second fixed part for be connected fixedly with outside second installation basis. Also discloses a fan system applying the motor bracket and a range hood applying the fan system. Compared with the prior art, the utility model has the advantages that: through setting up the motor support of tube-shape, make its back of being connected with outside installation basis, form stable overall structure to can follow the anti transportation of all directions and fall, keep apart the part on second installation basis and large-traffic air current moreover, reduce the noise that the turbulent flow energy dissipation and local vortex loss, and then reduce the loss of flow and lead to.

Description

Motor support, fan system and range hood

Technical Field

The utility model relates to a power device, in particular to a motor support, a fan system applying the motor support and a range hood applying the fan system.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

In a conventional blower system, a motor is fixedly connected to a volute through a bracket, and as disclosed in chinese patent with application number 201910424900.1, the blower includes: the air conditioner comprises a shell, wherein an air inlet is formed in the shell; the motor is arranged in the shell, and a rotating shaft of the motor is vertical to the air inlet surface; the motor bracket is used for fixing the motor on the shell, and the projection area of the motor bracket on the air inlet surface is set to be the minimum.

The existing fan system has the following defects:

1. the motor is itself heavier (copper product material plus silicon steel sheet is main, density is all bigger, and thick and solid) forms obvious local concentrated quality, general motor support only has better intensity in certain direction, as shown in fig. 21 transversely in the above-mentioned patent, and in other directions especially the upper and lower direction impact leads to crooked or twist reverse the time, the support of whole support is not enough, and range hood probably bears the impact of each direction in the transportation, this kind of support often leads to discovery after the machine installation to buckle or other deformations, unusual scratch moves in the machine, serious impeller that leads to warp.

2. Airflow at the rear end of the motor and surrounding areas flows disorderly, and the number of vortexes is large, so that the energy dissipation and noise are large; and this kind of pneumatic design leads to the local heat dissipation of motor and for the relatively unified one-way business turn over air current of formation direction, and chaotic flow makes oil smoke gas in the regional aggravation separation of motor easily moreover, and the adhesion of a lot of oil drops separation back adhesion is at motor outer end cover and wire hole position, and the adhesion of face oil liquid can make the motor radiating effect descend, the easy heat protection of summer and stall (fluid is hot bad conductor), and on the other hand is wire hole oil feed or water still easily, leads to the motor to damage.

SUMMERY OF THE UTILITY MODEL

The first technical problem to be solved by the present invention is to provide a motor bracket, which can improve the connection stability and reliability and reduce noise caused by flow loss, in view of the above-mentioned disadvantages of the prior art.

The second technical problem to be solved by the utility model is to provide a fan system applying the motor bracket.

The third technical problem to be solved by the utility model is to provide a range hood with the fan system.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: a motor support which characterized in that: the motor support is the hollow tube-shape of both ends open-ended, one of them one end of motor support is formed with annular first fixed part for be connected fixedly with outside first installation basis, the other end that the motor support is relative is formed with annular second fixed part for be connected fixedly with outside second installation basis.

Preferably, in order to further improve connection stability by allowing the first fixing portion and the second fixing portion to be attached to an external mounting base, the first fixing portion and the second fixing portion are both flat plates.

The technical scheme adopted by the utility model for solving the second technical problem is as follows: the utility model provides an use fan system as above motor support, includes the motor, its characterized in that: the motor constitutes second installation basis, the motor includes motor body and the shirt rim that forms in the motor body periphery, the second fixed part is connected fixedly with the shirt rim.

Preferably, the fan system further includes a volute, the motor is disposed in the volute, a first air inlet and a second air inlet are formed in two opposite sides of the volute, and a portion of the motor support extends into the volute from the second air inlet.

In order to guide oil smoke gas flow into the fan system from the second air inlet, a first flow guide portion is formed between the first fixing portion and the second fixing portion, a second flow guide portion bent towards the interior of the volute is formed at the position, located on the periphery of the second air inlet, of the volute, and an air inlet flow guide channel is formed between the first flow guide portion and the second flow guide portion.

The technical scheme adopted by the utility model for solving the third technical problem is as follows: the utility model provides an use range hood as above fan system, includes the fan frame, its characterized in that: the fan frame constitutes first installation basis, the fan frame includes the back lateral wall, first fixed part is connected fixedly with the back lateral wall.

In order to facilitate heat dissipation of the motor, the rear side wall of the fan frame is provided with an air supplementing hole corresponding to the region in the first fixing portion, a first flow guide portion is formed between the first fixing portion and the second fixing portion, a jet hole is formed in the position, close to the second fixing portion, of the first flow guide portion, and the jet hole enables the interior of the motor support and the interior of the volute to be communicated in a fluid mode.

Preferably, in order to guide the heat-dissipating airflow, a molded line of an axial section of the motor bracket between two opening ends includes a first curved line section, a connecting section, a second curved line section, a straight line section and an extending section, the straight line section corresponds to the first fixing portion, the first curved line section, the connecting section, the second curved line section and the extending section are sequentially arranged and correspond to the first flow guide portion, the straight line section and the first curved line section are in smooth transition, the second curved line section and the extending section are in smooth transition, and the jet hole is formed in a portion corresponding to the extending section.

In order to facilitate the passing of heat dissipation airflow and ensure the Venturi effect of a flow passage between the first flow guide part and the motor body at the same time, and improve the local speed heat dissipation, the minimum clearance between the second curve section and the outer peripheral wall of the motor body is L1, and the requirement of meeting the requirement of the heat dissipation airflow

Wherein R is_{Electric machine}Is the radius of the motor body.

Preferably, in order to guide the heat-dissipating airflow, at least one of the first curved section and the second curved section is in the shape of a circular arc protruding toward the inside of the motor bracket.

In order to avoid impact and energy dissipation on the oil fume flow in the impeller and facilitate ejection flow to take away heat dissipation airflow, the second curve section is arc-shaped and has a radius of R_DEAnd satisfy

Wherein R is_{Electric machine}Is the radius of the motor body.

In order to facilitate the jet flow and the turning of the heat dissipation airflow, the first curve section and the second curve section are both arc-shaped, and the curvature of the second curve section is larger than that of the first curve section.

Preferably, for easy flow guiding and easy manufacturing, the radius of the second curve segment is R_DEThe radius of the first curve segment is R_BCAnd satisfy

In order to avoid overlarge turning when the oil smoke gas flow enters from the second air inlet, the second curve section is in a circular arc shape and has the radius of R_DEThe connecting section is also a circle protruding towards the inside of the motor supportIs arc-shaped and satisfy

Wherein R is_CDIs the radius of the connecting segment.

In order to facilitate the connection of the motor and an external power supply, the motor also comprises a lead led out from the part of the motor body positioned at the rear side of the skirt edge, so that water and oil can be prevented from entering a wire outlet hole of the motor.

Compared with the prior art, the utility model has the advantages that: the cylindrical motor support is connected with an external installation foundation to form a stable integral structure, so that the transportation falling can be prevented from all directions, the part of the second installation foundation is isolated from large-flow airflow, the energy dissipation of turbulent flow and local vortex loss are reduced, and the noise caused by flow loss is further reduced; the rear side wall of the fan frame is provided with the air supplementing hole, so that the heat dissipation work of the motor can be completed well, and meanwhile, the risk that water and oil enter the motor wire outlet hole is avoided.

Drawings

Fig. 1 is a schematic view of a fan frame and a fan system of a range hood according to an embodiment of the present invention;

fig. 2 is a sectional view of a fan frame and a fan system of a range hood according to an embodiment of the present invention;

FIG. 3 is a cross-sectional side view of a fan frame and fan system of a range hood according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion I of FIG. 3;

FIG. 5 is a schematic view of a motor of a fan system according to an embodiment of the present invention;

fig. 6 is a schematic view of a motor mount of a fan system according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and that the directional terms are used for purposes of illustration and are not to be construed as limiting, for example, because the disclosed embodiments of the present invention may be oriented in different directions, "lower" is not necessarily limited to a direction opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 and 2, a partial structure of a range hood is shown, including a fan frame 1 and a fan system 2 disposed in the fan frame 1, and other partial structures of the range hood may be the same as those of the prior art.

Referring to fig. 2 and 5, the fan system 2 is a centrifugal fan, and includes a volute 21, an impeller 22 disposed in the volute 21, and a motor 23 for driving the impeller 22 to rotate. The motor 23 includes a motor body 231 and an annular skirt 232 formed at the outer periphery of the motor body 231. The motor 23 is fixedly connected with the fan frame 1 through a motor bracket 24.

Referring to fig. 2 and 6, the motor bracket 24 is substantially hollow and cylindrical with two open ends, wherein one end of the motor bracket is open toward the rear wall 11 of the fan frame 1 (the rear wall 11 is a side wall close to the wall when the range hood is installed), and the other end of the motor bracket is open toward the motor 23. The motor supports 24 are circumferentially symmetrically distributed and have an axis X, which is also the axis of the fan system 2 as a whole. The motor bracket 24 includes a first fixing portion 241, a first flow guide portion 2421 and a second fixing portion 243, which are integrally formed, sequentially arranged along an axial direction. The first fixing portion 241 is an annular structure formed by radially extending the first airflow guide portion 2421 outward toward the end of the rear sidewall 11 of the fan frame 1, and the first fixing portion 241 is flat, so as to be able to be attached to the rear sidewall 11 of the fan frame 1 serving as a first mounting base. The second fixing portion 243 is an annular structure formed by extending the first flow guide portion 2421 radially inward toward the end of the motor 23, and the second fixing portion 243 is flat and can be attached to one side of the skirt 232 of the motor 23 facing the rear sidewall 11, which is used as a second mounting base. The first fixing portion 241 may be fixed to the rear sidewall 11 of the fan frame 1 by screws, and the second fixing portion 243 may be fixed to the skirt 232 of the motor 23 by screws. Therefore, the motor 23, the motor bracket 24 and the air frame 1 form a stable barrel-shaped frame structure when the transportation fall is handled, and the reliability is greatly improved.

The scroll casing 21 includes a first cover plate 211, a second cover plate 212, and a circular wall 213 connected between the first cover plate 211 and the second cover plate 212, wherein the first cover plate 211 is provided with a first air inlet 214, and the second cover plate 212 is provided with a second air inlet 215, so as to form a double-inlet fan system. In this embodiment, the fan system 2 is disposed in such a manner that the first air inlet 214 is a primary air inlet and extends to the front side, and the second air inlet 215 is a secondary air inlet and faces to the rear side, i.e. the second cover plate 212 is close to the rear side wall 11 of the fan frame 1.

The second cover plate 212 is provided with a second guiding portion 216 bent toward the inside of the scroll casing 21 at a position around the second air inlet 215, and a surface of the second guiding portion 216 contacting the oil fume flow is a smooth curved surface. The first guide portion 242 extends from the rear side of the scroll casing 21 into the interior of the scroll casing 21 through the second air inlet 215. An air inlet flow guide channel Q is formed between the first flow guide part 242 and the second flow guide part 216, and the rear end of the motor 23 is completely isolated by the first fixing part 241, so that turbulent flow energy dissipation and local vortex loss are reduced, and noise caused by flow loss is reduced.

Referring to fig. 2 and 4, a profile of an axial cross section of the motor bracket 24 between two open ends includes a first curved section BC, a connecting section CD, a second curved section DE, a straight section AB and an extending section EF, wherein the straight section AB corresponds to the first fixing portion 241, the first curved section BC, the connecting section CD, the second curved section DE and the extending section EF correspond to the first flow guiding portion 242, the straight section AB and the first curved section BC are smoothly transited, and the second curved section DE and the extending section EF are smoothly transited. Preferably, the first curved segment BC and the second curved segment DE are both circular arcs protruding toward the inside of the motor bracket 24. The second fixing portion 243 is located at an end portion of the extending section EF far from the second curved section DE, and a portion of the first flow guiding portion 242 corresponding to the extending section EF is preferably hollow and cylindrical, and a wall surface thereof is provided with a jet hole 244, so that the inside of the motor bracket 24 is in fluid communication with the inside of the volute casing 21.

The rear side wall 11 of the fan frame 1 is provided with an air supply hole 12 corresponding to the area in the first fixing portion 241, the fan system 2 is a centrifugal fan, and air flow needs to enter axially and flow out radially. The first flow guiding portion 242 enables the air entering from the air supply hole 12 to smoothly complete the large turning direction in the axial turning direction, and forms airflow jet flow at the portion corresponding to the second curve section DE by the first flow guiding portion 241 to be ejected from the jet hole 244, so as to realize active heat dissipation at the rear end of the motor 23. Since the wire 233 of the motor 23 is led out from the rear end (the portion behind the skirt 233), and the clean air flow at the rear end of the fan frame 1 is led in at this time, the collected oil smoke gas is more clean than the original oil smoke collecting cover (not shown), and the one-way air flow from the air supplementing hole 12 to the jet hole 244 is mainly used at this time, the vortex is greatly reduced, the heat dissipation work of the motor 23 is mainly completed, and there is no risk that water and oil enter the outlet hole (the hole through which the wire 233 passes out of the motor body 231) of the motor 23. The power of the air flow of the jet flow comes from the pressure difference of the internal large negative pressure and the external standard air pressure formed when the impeller 23 rotates to drive the oil smoke gas flow to flow through the jet hole 244.

The connecting section CD is preferably a straight line, and an included angle a between the connecting section CD and the straight line section AB, a ∈ [30 °, 80 °, in this embodiment, is preferably 70 °, and the included angle is related to the installation height of the motor 23 and the width of the air intake and flow guiding channel Q of the volute 21. Alternatively, the connecting segments CD may be replaced by small-curvature arcs.

The curvature of the second curved segment DE is generally greater than the curvature of the first curved segment BC. The minimum clearance between the second curved section DE and the outer peripheral wall of the motor body 231 is L1, and L1 cannot be too small, so that resistance is increased too much, and heat dissipation airflow is not facilitated to pass through; it cannot be too large because the cross section of the fluid passage between the motor 23 and the motor bracket 24 is reduced and then enlarged, and the local venturi effect is utilized, so that the velocity of the gas is increased due to the venturi effect when the heat dissipation gas flow passes through the narrowed passage, which helps to improve the heat dissipation effect at the motor housing attachment. If L1 is too large, the Venturi effect is reduced, and the local speed heat dissipation is not improved.

Preferably, satisfy

Wherein R is_{Electric machine}Is the radius of the motor body 231.

The radius of the second curve section DE cannot be too large, which greatly affects the outflow angle (the angle is still off-axial) of the oil smoke gas flow in the impeller 22 after the oil smoke gas flow axially rotates in the radial direction, and thus impact and energy dissipation are easily caused; too small results in too large outflow angle (radial direction), which is not favorable for ejecting flow to take away heat dissipation airflow.

Preferably, satisfy

Wherein R is_DEIs the radius of the second curve segment DE.

The first curve segment BC mainly considers the flow guiding effect and the process is convenient, preferable and meets the requirement of

The connecting section CD is mainly characterized in that on the premise of ensuring the connection of the first curve section BC and the second curve section DE, the relative turning channel of the second flow guide part 216 on the volute casing 21 is considered, so the connecting section CD also has a proper size, the relative change Delta S of the channel section is kept to be less than or equal to 10 percent as much as possible,

wherein R is_CDIs the radius when the connecting segment CD is a small curvature arc.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion, respectively), i.e., a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first portion and/or be transported to the second portion, and may be a direct communication between the first portion and the second portion, or an indirect communication between the first portion and the second portion via at least one third element, such as a fluid channel, e.g., a pipe, a channel, a duct, a flow guide, a hole, a groove, or a chamber that allows a fluid to flow through, or a combination thereof.

Claims (15)

1. A motor support which characterized in that: the motor support is the hollow tube-shape of both ends open-ended, one of them one end of motor support is formed with annular first fixed part (241) for be connected fixedly with outside first installation basis, the opposite other end of motor support is formed with annular second fixed part (243) for be connected fixedly with outside second installation basis.

2. The motor mount of claim 1, wherein: the first fixing part (241) and the second fixing part (243) are both flat plates.

3. A fan system applying a motor support according to claim 1 or 2, comprising a motor (23), characterized in that: the motor (23) forms a second mounting base, the motor (23) comprises a motor body (231) and a skirt edge (232) formed on the periphery of the motor body (231), and the second fixing portion (243) is fixedly connected with the skirt edge (232).

4. The fan system of claim 3, wherein: the fan system further comprises a volute (21), the motor (23) is arranged in the volute (21), a first air inlet (214) and a second air inlet (215) are formed in two opposite sides of the volute (21), and part of the motor support extends into the volute (21) from the second air inlet (215).

5. The fan system of claim 4, wherein: form first water conservancy diversion portion (242) between first fixed part (241) and second fixed part (243), volute (21) are located the peripheral position of second air intake (215) and are formed with towards the inside second water conservancy diversion portion (216) of buckling of volute (21), constitute air inlet water conservancy diversion passageway (Q) between first water conservancy diversion portion (242) and second water conservancy diversion portion (216).

6. A range hood applying the fan system according to claim 3 or 4, comprising a fan frame (1), characterized in that: the fan frame (1) forms a first installation foundation, the fan frame (1) comprises a rear side wall (11), and the first fixing portion (241) is fixedly connected with the rear side wall (11).

7. The range hood of claim 6, wherein: the utility model discloses a fan support, including fan frame (1), fan support, second fixed part (243), the regional tonifying qi mouth (12) of having seted up corresponding in first fixed part (241) on the back lateral wall (11) of fan frame (1), form first water conservancy diversion portion (242) between first fixed part (241) and second fixed part (243), the position that first water conservancy diversion portion (242) are close to second fixed part (243) has seted up jet hole (244), jet hole (244) make the inside and the inside fluid intercommunication of spiral case (21) of motor support.

8. The range hood of claim 7, wherein: the molded lines of the axial section of the motor support between the two opening end portions comprise a first curve section (BC), a connecting section (CD), a second curve section (DE), a straight section (AB) and an extending section (EF), the straight section (AB) corresponds to a first fixing portion (241), the first curve section (BC), the connecting section (CD), the second curve section (DE) and the extending section (EF) are sequentially arranged and correspond to a first flow guide portion (242), the straight section (AB) and the first curve section (BC) are in smooth transition, the second curve section (DE) and the extending section (EF) are in smooth transition, and the jet hole (244) is arranged on a portion corresponding to the extending section (EF).

9. The range hood of claim 8, wherein: the minimum clearance between the second curve section (DE) and the outer peripheral wall of the motor body (231) is L1, and the minimum clearance satisfies

Wherein R is_{Electric machine}Is the radius of the motor body (231).

10. The range hood of claim 8, wherein: at least one of the first curved section (BC) and the second curved section (DE) is in the shape of a circular arc protruding towards the inside of the motor bracket.

11. The range hood of claim 10, wherein: the second curve segment (DE) is in the shape of a circular arc and has a radius R_DEAnd satisfy

Wherein R is_{Electric machine}Is the radius of the motor body (231).

12. The range hood of claim 9, wherein: the first curve segment (BC) and the second curve segment (DE) are both circular arcs, the curvature of the second curve segment (DE) being greater than the curvature of the first curve segment (BC).

13. The range hood of claim 12, wherein: the radius of the second curve section (DE) is R_DEThe radius of the first curve segment (BC) is R_BCAnd satisfy

14. The range hood of claim 10, wherein: the second curve segment (DE) is in the shape of a circular arc and has a radius R_DEThe connecting section (CD) is also in the shape of a circular arc protruding towards the inside of the motor bracket and meets the requirement

Wherein R is_CDIs the radius of the connecting segment (CD).

15. The range hood of claim 7, wherein: the motor (23) further comprises a lead (233) led out from the part of the motor body (231) located on the rear side of the skirt (232).

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