CN217271017U

CN217271017U - Volute, fan system applying volute and range hood

Info

Publication number: CN217271017U
Application number: CN202220697390.2U
Authority: CN
Inventors: 吴灵辉
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-08-23
Anticipated expiration: 2032-03-28

Abstract

The utility model discloses a spiral case, including two apron and the rampart of setting between two apron that the interval set up, the air intake has been seted up on the apron, still is equipped with motor support, its characterized in that in one of them apron department: the motor support includes towards bellied water conservancy diversion circle of spiral case outside direction, be used for installing the collar and the connecting portion of motor, water conservancy diversion circle and collar are cyclic annularly, the water conservancy diversion circle is located the air intake periphery, the collar is located the inboard of water conservancy diversion circle, pass through between water conservancy diversion circle and the collar connecting portion are connected, water conservancy diversion circle, collar and connecting portion are integrated into one piece. Compared with the prior art, the utility model has the advantages of: through forming the water conservancy diversion circle on integrated into one piece's motor support, can realize the water conservancy diversion function, avoid forming the vortex, improve the air inlet effect.

Description

Volute, fan system applying volute and range hood

Technical Field

The utility model relates to a power device, especially a spiral case, applied fan system and range hood that have this spiral case.

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.

The chinese utility model patent of 202020823858.9 discloses a centrifugal fan and oil smoke purifier, centrifugal fan include spiral case, motor support, impeller and external rotor electric machine, and the air intake has been seted up to the relative both sides of spiral case, and the impeller is located in the spiral case, motor support install in one of them of spiral case air intake department, external rotor electric machine include stator and the rotatable rotor of locating the stator periphery, and the terminal surface and the motor support of stator are connected fixedly, and the rotor is connected fixedly with the impeller.

A motor in a fan system of the range hood is generally arranged on an independent motor support, the motor support is generally arranged on a volute cover plate in a fixing mode of welding, riveting, screwing and the like, and the cover plate is correspondingly arranged to give way.

The motor support installation accuracy of independent installation receives the influence of processes such as welding to can lead to motor installation off-centre, further lead to the impeller of installing on the motor off-centre, thereby influence fan performance. In addition, the split motor support can increase working procedures, waste materials and increase cost. Bear effort such as centrifugal force among the rotatory process of motor impeller on the motor support, in case structural strength such as welding is not enough, can cause extra vibrations, even the risk that drops. The motor bracket also breaks the flow directing structure on the volute cover plate body, where additional eddy currents can result. The existing motor support mainly improves air inlet space by changing the radial projection area of a motor, but does not have good airflow guide in the axial direction, and the side air inlet of the motor support is relatively bad.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the first technical problem that will solve provides a spiral case to the not enough of above-mentioned prior art existence, has the water conservancy diversion function, improves the air inlet effect.

The utility model aims to solve the second technical problem that a fan system that uses has this spiral case is provided.

The utility model aims to solve the third technical problem that a use range hood that has this fan is provided.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: the utility model provides a spiral case, includes two apron and the rampart of setting between two apron that the interval set up, the air intake has been seted up on the apron, still is equipped with motor support, its characterized in that in one of them apron department: the motor support includes towards the bellied water conservancy diversion circle of spiral case outside direction, be used for installing the collar and the connecting portion of motor, water conservancy diversion circle and collar are cyclic annularly, the water conservancy diversion circle is located the air intake periphery, the collar is located the inboard of water conservancy diversion circle, pass through between water conservancy diversion circle and the collar connecting portion are connected, water conservancy diversion circle, collar and connecting portion are integrated into one piece.

In order to realize the air inlet better, the connecting parts are at least three, and a vent hole is formed between each two adjacent connecting parts and the flow guide ring.

In order to improve the structural strength, a first flanging extending towards the inner side direction of the volute is formed at the periphery of the vent hole of the motor bracket.

In order to improve the structural strength, a second flanging extending towards the outer side direction of the volute is formed at the inner ring of the mounting ring.

In order to improve the processing precision and avoid eccentricity, the motor support and the corresponding cover plate are integrally formed.

The utility model provides a technical scheme that above-mentioned second technical problem adopted is: a fan, its characterized in that: a volute as described above is applied.

The utility model provides a technical scheme that above-mentioned third technical problem adopted does: a range hood, its characterized in that: a fan system as described above is applied.

Compared with the prior art, the utility model has the advantages of: the guide ring is formed on the integrally formed motor support, so that the guide function can be realized, the formation of eddy current is avoided, and the air inlet effect is improved; the volute bracket is integrated on the cover plate of the volute, and the motor bracket and the cover plate are integrally formed, so that the machining precision of the motor bracket is higher, and the eccentric phenomenon of the impeller is solved.

Drawings

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

fig. 2 is an exploded view of the range hood according to the embodiment of the present invention;

fig. 3 is a schematic view of a volute of a range hood according to an embodiment of the present invention;

fig. 4 is a sectional view of a part of components of the range hood according to the embodiment of the present invention;

fig. 5 is a schematic view of the range hood according to the embodiment of the present invention when the motor bracket is used independently;

fig. 6 is an installation schematic diagram of a fan system of a range hood according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Referring to fig. 1 to 2 and 6, a range hood includes a fan frame 4 and a fan system disposed in the fan frame 4. The fan system comprises a volute, an impeller 2 arranged in the volute and a motor 3 for driving the impeller 2 to rotate. The top-suction type range hood is shown in the figure, but alternatively, the range hood can be of any other form.

Referring to fig. 2 to 3 and fig. 6, the volute includes two cover plates 11 disposed at intervals and a circumferential wall 12 disposed between the two cover plates 11, an air inlet 111 is disposed on each cover plate 11, and in this embodiment, an air inlet 111 is disposed on each cover plate 11.

Referring to fig. 2 to 3, a motor bracket 13 for fixing a motor is provided at a cover plate 11 provided at the rear of the scroll case. The motor bracket 13 includes a deflector ring 131 protruding toward an outside direction of the scroll casing, a mounting ring 132 for mounting the motor 3, and a connection part 133. The guide ring 131 is annular and is installed around the air inlet 111, and part of the guide ring 131 is located at the periphery of the air inlet 111 and part of the guide ring extends into the air inlet 111. The mounting ring 132 is also annular and is located inside the flow guiding ring 131, and the mounting ring 132 is concentrically arranged with the flow guiding ring 131. The mounting ring 132 is provided with a hole site for flange connection with the motor 3, and the inner ring diameter of the mounting ring 132 is slightly larger than the diameter of the motor 3 so as to facilitate the motor to be put in. The deflector ring 131 and the mounting ring 132 are connected by a connecting portion 133, and the connecting portion 133 extends in a radial direction of the deflector ring 131 and the mounting ring 132. The number of the connecting portions 133 in this embodiment is three, and the vent holes 134 are formed between two adjacent connecting portions 133 and the baffle 131. The deflector ring 131, the mounting ring 132 and the connecting portion 133 are integrally formed.

Referring to fig. 5, the motor bracket 13 is formed at a peripheral portion of the vent hole 134 with a first flange 135 extending toward an inside direction of the scroll case. The bending angle interval of the first flange 135 (the part of the vent hole 134 located at the periphery relative to the deflector ring 131 and the connecting part 133) is 45-90 degrees, the flange height of the first flange 135 is 2-5 mm, and a second flange 136 extending towards the outer side of the volute is formed at the inner ring of the mounting ring 132. The height of the second flange 136 is 2 mm-5 mm. By providing the first flange 135 and the second flange 136, the structure can be reinforced. The mounting ring 132 may be further provided with profiling for reinforcement, and the deflector 131, the connecting portion 133 and the mounting ring 132 may be further provided with integral profiling, the number of profiling being the same as the number of the vent holes 134.

Referring to fig. 4, optionally, the motor bracket 13 and the corresponding cover plate 11 are integrally formed, the guide ring 131 avoids that the traditional motor bracket breaks the guide ring to generate vortex, the guide ring 131 is a multi-section curved surface coaxial with the center of the impeller 2, and the section in the axial direction of the impeller 2 is formed by two or more sections, for example, when the two sections are provided, the first curved surface characteristic curve ABC may be a linear shape with guidance, such as an arc, an airfoil, a spiral, a bezier formula fitting curve, and the like, the point B is the highest point, the point a is the tangent point of the guide ring 131 and the cover plate 11 of the volute, and the point a has the coordinate (a) of (a) _x ，A _y ) The coordinate of point B is (B) _x ，B _y )，A _x Dimensional requirement D _i To 1.1D _i ，B _y The size requirement is 3-10 mm, whichIn D _i Is the impeller diameter. Wherein the second curve characteristic curve CD is a part of the stent characteristic curve, and the coordinate of the D point is (D) _x ，D _y )，D _x The size requirement is 0.7D _i -0.9D _i . The connecting portion 133 also has the effect of water conservancy diversion, and the width of connecting portion 133 is 10 ~ 30mm, and the width can remain unchanged along the direction of height, also can adopt the form that reduces earlier and increases afterwards, guarantees that connecting portion 133 both ends have sufficient connection face, and the shortest width requirement is not less than 10mm, and the middle is sheltered from the area through reducing and is also promoted the air inlet area in step. The characteristic curve CDE is preferably a streamline curved surface which is concave inwards to the side of the guide ring 131, the point E is a tangent point of the mounting ring 132 and the connecting part 133, and the point E is _x Is D _d Adding 10-20 mm, D _d The diameter of the motor is the characteristic curve, and the flow guide can be carried out mainly by combining the conditions, and the motor is not limited to a streamline shape. In addition, traditional motor support generally welds on the spiral case apron alone by a plurality of connecting portions, and connecting portion cover water conservancy diversion circle after can breaking the spiral case, and partial structure also can evaginate on air inlet channel, blocks the air inlet. The area of the vent 134 is not less than 0.78 × D _y *D _y 。

Referring to fig. 5, for the convenience of disassembly, the motor bracket 13 may be disposed independently of the corresponding cover plate 11, and may have a flange surface 137 to be connected to the cover plate 11.

Claims

1. The utility model provides a volute, includes two apron (11) that the interval set up and sets up rampart (12) between two apron (11), air intake (111) have been seted up on apron (11), still be equipped with motor support (13), its characterized in that in one of them apron (11) department: motor support (13) are including towards bellied water conservancy diversion circle (131) of spiral case outside direction, collar (132) and connecting portion (133) that are used for installing motor (3), water conservancy diversion circle (131) and collar (132) are cyclic annularly, water conservancy diversion circle (131) are located air intake (111) periphery, collar (132) are located the inboard of water conservancy diversion circle (131), pass through between water conservancy diversion circle (131) and the collar (132) connecting portion (133) are connected, water conservancy diversion circle (131), collar (132) and connecting portion (133) are integrated into one piece.

2. The spiral casing of claim 1 wherein: the number of the connecting parts (133) is at least three, and a vent hole (134) is formed between each two adjacent connecting parts (133) and the guide ring (131).

3. The spiral casing of claim 2 wherein: the motor bracket (13) is provided with a first flanging (135) which is formed at the periphery of the vent hole (134) and extends towards the inner side direction of the volute.

4. The spiral casing of claim 1 wherein: and a second flanging (136) extending towards the outer side direction of the volute is formed at the inner ring of the mounting ring (132).

5. The spiral casing of claim 1 wherein: the motor support (13) and the corresponding cover plate (11) are integrally formed.

6. A fan system, its characterized in that: use of a volute according to any of claims 1 to 5.

7. A range hood, its characterized in that: use of a fan system according to claim 6.