CN220470293U - Blower fan - Google Patents

Abstract

The utility model provides a fan, wherein the fan comprises: an impeller; the spiral case is internally provided with a containing cavity, the spiral case is provided with an air outlet communicated with the containing cavity, the impeller is arranged in the containing cavity, and the impeller rotates to generate air flow and enables the air flow to be discharged from the air outlet; the volute comprises a bending section and a straight line section with one end connected with the bending section, the bending section and the straight line section are enclosed into a containing cavity, and the other end of the straight line section forms the lower edge of the air outlet; along the air outlet direction of the fan, the distance between the straight line segment and the axis of the air outlet is gradually increased.

Description

Blower fan

Technical Field

The utility model relates to the technical field of centrifugal fans, in particular to a fan.

Background

In the related art, the flow of the fan is improved by adopting a mode of improving the number of the blades arranged on the impeller, more blades are required to be arranged in the volute of the fan in the mode, the installation operation is complex, and the production cost of the fan is high.

Disclosure of Invention

In order to solve at least one of the above problems, an object of the present utility model is to provide a fan.

One object of the present utility model is to propose a fan comprising: an impeller; the spiral case is internally provided with a containing cavity, the spiral case is provided with an air outlet communicated with the containing cavity, the impeller is arranged in the containing cavity, and the impeller rotates to generate air flow and enables the air flow to be discharged from the air outlet; the volute also comprises a bending section and a straight line section, one end of the straight line section is connected with the bending section, the bending section and the straight line section are enclosed to form a containing cavity, and the other end of the straight line section forms the lower edge of the air outlet; along the air outlet direction of the fan, the distance between the straight line segment and the axis of the air outlet is gradually increased.

The fan provided by the utility model comprises an impeller and a volute, wherein a containing cavity is arranged in the volute, an air outlet is arranged on the volute, and the air outlet is communicated with the containing cavity. The impeller of the fan is arranged in the accommodating cavity, when the impeller is arranged in the accommodating cavity, the impeller rotates to attract air to enter the accommodating cavity and act on the air entering the accommodating cavity, so that the air is converged into air flow, the air flow can flow to the air outlet due to the rotation of the impeller and the guiding of the volute, and finally the air flow is discharged from the air outlet.

Through the impeller, the accommodating cavity arranged in the volute and the air outlet arranged on the volute, the fan has the function of converting mechanical energy into gas pressure energy, and then air flow can be provided for a user.

The volute also comprises a bending section and a straight line section with one end connected with the bending section, wherein the bending section and the straight line section are enclosed into a containing cavity, and the other end of the straight line section forms the lower edge of the air outlet. Along the air outlet direction of the fan, the distance between the straight line segment and the axis of the air outlet is gradually increased. The utility model enables the straight line segment to start from the position connected with the bending segment, not to retract inwards directly, namely to extend towards the direction close to the axis of the air outlet, but to extend outwards, and the distance between the straight line segment and the axis of the air outlet is gradually increased, thereby realizing the outward expansion of the air channel and the increase of the size of the air outlet.

Through the distance relation setting between the axis to straightway and the air outlet for along the air-out direction, the holding chamber is at the part cross-sectional area of straightway increase gradually, and the size grow of air outlet, and then promoted the flow of fan exhaust air current, and because of the air current flow who sets up and improve to the shape of spiral case, need not to adjust the arrangement form of blade on the impeller, need not to set up a plurality of blades, and then can reduce the structure complexity of fan, reduced the manufacturing cost of fan.

In addition, the extending direction of the straight line section is set, the whole width of the volute is not changed, and therefore compared with the existing volute with equal width, the flow of the air discharged from the air outlet is higher, and the fan provided by the utility model can be suitable for use occasions with narrower space.

In summary, the fan provided by the utility model has the advantages that the distance between the straight line section and the axis of the air outlet is gradually increased along the air outlet direction of the fan, so that the flow of the fan is improved under the condition that the width of the volute is not increased and the number of blades of the impeller is not increased, the application range of the fan is further improved, the complexity of parts of the fan is reduced, the production cost of the fan is reduced, and the economic benefit of a fan product is improved.

In addition, the fan in the technical scheme provided by the utility model can also have the following additional technical characteristics:

in some embodiments, optionally, the curved section includes a first sub-section, one end of which is connected to the straight section; the second sub-section is connected with one end of the first sub-section, which is away from the straight line section, and the other end of the second sub-section forms the upper edge of the air outlet; along the air outlet direction of the fan, the second subsection extends to a direction far away from the axis of the air outlet.

In the technical scheme, the bending section specifically comprises two sections of bending parts, namely a first subsection and a second subsection, wherein one end of the first subsection is connected with the straight line section, the second subsection is connected with one end of the first subsection, which is away from the straight line section, the other end of the second subsection forms the upper edge of the air outlet, namely, the outline part of the volute in the utility model is formed by starting from the upper edge of the air outlet, and the first subsection and the straight line section which are bent in turn are formed by one section of bending second subsection, and the other section of bending first subsection and the straight line section which extends in a straight line.

Along the air outlet direction of the fan, the second subsection extends in the direction far away from the axis of the air outlet, namely, the utility model not only expands the lower edge of the air outlet, but also expands the upper edge of the air outlet, so that the size of the air outlet is enlarged in the height direction, and the flow of the fan is further improved.

In addition, the second subsection is extended in the direction far away from the axis of the air outlet along the air outlet direction of the fan, so that the air outlet can be installed with a large-size pipeline or a bent pipeline, and the application range of the fan provided by the utility model is further improved.

In some embodiments, optionally, an included angle is formed between the axis of the air outlet and the axis of rotation of the impeller.

In the technical scheme, under the condition that the impeller is mounted in the accommodating cavity, an included angle is formed between the axis of the air outlet and the rotation axis of the impeller, namely the air outlet is arranged on one side of the impeller.

Through the setting between the axis to the air outlet and the axis of rotation of impeller for holistic width size of fan is littleer, and can make impeller and the better cooperation of spiral case, guides and gathers the air that enters into the holding intracavity of spiral case, realizes handling the air in order to produce the air current.

In some embodiments, optionally, the volute further comprises: the first shell surface is connected with one side of the bending section and one side of the first straight line section; the second shell surface is connected with the other side of the bending section and the straight line section, and the distance between the second shell surface and the first shell surface is smaller than or equal to 0.8m.

In the technical scheme, the volute also comprises a first shell surface and a second shell surface, wherein the second shell surface and the first shell surface are two surfaces of the volute opposite to each other. The first shell surface is connected with one side of the bending section and the straight line section, the second shell surface is connected with the other side of the bending section and the straight line section, the first shell surface and the second shell surface are respectively the front surface and the back surface of the volute, and the accommodating cavity of the volute is formed by enclosing the bending section, the straight line section, the first shell surface and the second shell surface.

The distance between the second shell surface and the first shell surface is smaller than or equal to 0.8m, and the whole width of the volute is smaller by limiting the size range between the front surface and the back surface of the volute, so that the volute can be installed and used in a space with narrower width.

In some embodiments, optionally, the fan further includes: the rotating shaft is rotatably arranged in the volute, and at least part of the rotating shaft is positioned in the accommodating cavity; the impeller is sleeved on the rotating shaft and can synchronously rotate with the rotating shaft.

In this technical scheme, the fan still includes the rotation axis, and the rotation axis is the structure of transmission power, and its rotatable setting is in the spiral case, and at least part rotation axis is located the holding intracavity. The impeller is sleeved on the rotating shaft and can synchronously rotate with the rotating shaft.

Through the setting of rotation axis for the impeller has received the drive, and then can handle the air, produces the air current and makes the air current be discharged by the air outlet in the holding intracavity.

In some embodiments, optionally, the fan further includes: the bracket is arranged on the volute; the bearing box is arranged on the support, and the rotating shaft penetrates through the opening of the bearing box.

In this technical scheme, the fan still includes support and bearing box, and the support sets up in the spiral case, and it is a structure that is used for other parts of auxiliary fan to install to the spiral case.

The bearing box is arranged on the support, and the rotating shaft penetrates through the opening of the bearing box.

Through support and bearing box for the rotation axis can be stable set up in the spiral case, and part is located the holding intracavity, and can rotate, realizes driving impeller work.

In some embodiments, optionally, the impeller exit angle of the impeller is less than 90 °.

In the technical scheme, the impeller outlet angle of the impeller is smaller than 90 degrees, namely the impeller arranged in the utility model is a backward impeller, so that dust can be prevented from being coiled into the accommodating cavity of the volute when the impeller rotates, and the dustproof effect of the fan is improved.

In some embodiments, optionally, the fan further includes: the air inlet box is arranged on the volute, an air inlet is formed in the air inlet box, and the air inlet is communicated with the accommodating cavity.

In this technical scheme, the fan still includes the inlet box, and the inlet box sets up in the spiral case, has seted up the air intake on the inlet box, and the air intake is linked together with the holding chamber.

Through the arrangement of the air inlet box, air flow is guided to flow into the accommodating cavity of the volute, the flow condition of the air flow entering the accommodating cavity is improved, and the flow loss caused by uneven air flow entering the impeller is reduced.

In some embodiments, optionally, an included angle is formed between the axis of the air inlet and the axis of rotation of the impeller.

In the technical scheme, an included angle is formed between the axis of the air inlet and the rotation axis of the impeller, namely the air inlet device is arranged in a lateral air inlet mode, so that the overall width of the fan is reduced on the basis of guaranteeing the air inlet quantity, and the fan can be suitable for various use environments.

In some embodiments, optionally, the fan further includes: the support legs are arranged on the volute, one part of the support legs are arranged on the volute and used for being installed, and the other part of the support legs are arranged on the air inlet box and used for being installed.

In this technical scheme, the fan still includes a plurality of landing legs, and a plurality of landing legs can divide into two parts according to the difference of mounted position, and specifically, a part landing leg in a plurality of landing legs sets up on the spiral case for supply the spiral case to install, another part landing leg in a plurality of landing legs sets up on the inlet box for supply the inlet box to install.

Through setting up a plurality of landing legs and being located spiral case and inlet box respectively for the fan has a plurality of contact points when the installation, with ground or the foundation structure of installation fan between, has improved the stability of fan after the installation.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 shows one of the structural schematic diagrams of a blower according to an embodiment of the present utility model;

FIG. 2 shows a second schematic diagram of a blower according to an embodiment of the utility model;

FIG. 3 shows a third schematic diagram of a blower in accordance with one embodiment of the utility model;

FIG. 4 shows a fourth schematic structural diagram of a blower in accordance with one embodiment of the present utility model;

fig. 5 shows a fifth schematic structural diagram of a blower according to an embodiment of the present utility model.

The correspondence between the reference numerals and the component names in fig. 1 to 5 is:

100 fans, 110 impellers, 120 volutes, 122 accommodating cavities, 124 air outlets, 126 bent sections, 128 first subsections, 130 second subsections, 132 straight line sections, 134 first shell surfaces, 136 second shell surfaces, 140 rotating shafts, 150 brackets, 160 bearing boxes, 170 air inlet boxes, 172 air inlets, 180 supporting legs and 190 connecting sleeves.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

A fan according to some embodiments of the utility model is described below with reference to fig. 1-5.

As shown in fig. 1 and 2, in one embodiment of the present utility model, a blower 100 is provided, including: an impeller 110; the volute 120, the volute 120 is internally provided with a containing cavity 122, the volute 120 is provided with an air outlet 124 communicated with the containing cavity 122, the impeller 110 is arranged in the containing cavity 122, the impeller 110 rotates to generate air flow, and the air flow is discharged from the air outlet 124; the volute 120 further comprises a bending section 126 and a straight line section 132 with one end connected with the bending section 126, the bending section 126 and the straight line section 132 are enclosed to form a containing cavity 122, and the other end of the straight line section 132 forms the lower edge of the air outlet 124; along the air outlet direction of the fan 100, the distance between the straight line segment 132 and the axis of the air outlet 124 gradually increases.

In this embodiment, the fan 100 provided by the present utility model includes an impeller 110 and a volute 120, a housing cavity 122 is disposed in the volute 120, an air outlet 124 is disposed on the volute 120, and the air outlet 124 is communicated with the housing cavity 122. The impeller 110 of the fan 100 is disposed in the accommodating cavity 122, when the impeller 110 is disposed in the accommodating cavity 122, the impeller 110 rotates to attract air into the accommodating cavity 122, and acts on the air entering the accommodating cavity 122, so that the air is converged into an air flow, and the air flow flows to the air outlet 124 due to the rotation of the impeller 110 and the guidance of the volute 120, and is finally discharged from the air outlet 124.

Through the impeller 110, the accommodating cavity 122 arranged in the volute 120 and the air outlet 124 arranged on the volute 120, the fan 100 has the function of converting mechanical energy into gas pressure energy, and then the airflow flowing in a specific direction can be provided for a user.

The volute 120 further comprises a curved section 126 and a straight section 132 with one end connected to the curved section 126, wherein the curved section 126 and the straight section 132 enclose a housing 122, and the other end of the straight section 132 forms a lower edge of the air outlet 124.

It will be appreciated that the curved section 126 and the straight section 132 are the outer contour portion of the volute 120, and by the existence of the curved section 126, the inner casing wall of the volute 120 is matched with the fan 100, so that air is converged into an air flow in the accommodating cavity 122, and by the existence of the straight section 132, the air flow is guided, so that the air flow is discharged from the air outlet 124.

As shown in fig. 1 and fig. 2, along the air outlet direction of the fan 100, the distance between the straight line segment 132 and the axis of the air outlet 124, that is, the dashed line a in the drawing, gradually increases, and the curved segment 126 and the straight line segment 132 of the volute 120 are determined according to the volute line of the volute 120, that is, the fan 100 according to the present utility model is configured by deforming the volute line of the volute 120.

Specifically, as will be understood by those skilled in the art, the shape of the volute 120 is determined by the volute, as shown in fig. 3 and 4, the volute 120, that is, the dashed line B in fig. 3 and 4, is deformed, and the length and shape of the volute are designed according to the theoretical design content of the volute through square calculation, so that the length of the volute is increased, a straight line segment which is not directly retracted inwards from the connection point with the curved line segment exists in the volute, a straight line segment which is extended outwards from the connection point exists in the volute, and further, a straight line segment 132 which is extended outwards from the connection point with the curved segment 126 exists in the volute, so that the size of the air outlet 124 is increased.

Through the setting of the distance relation between the axis of the straight line segment 132 and the air outlet 124, the cross-sectional area of the accommodating cavity 122 in the straight line segment 132 is gradually increased along the air outlet direction, and the size of the air outlet 124 is increased, so that the flow of the air flow discharged by the fan 100 is improved, and the flow of the air flow discharged by the fan is improved due to the setting of the shape of the volute 120, the arrangement form of the blades on the multiple impellers 110 is not required to be adjusted, a plurality of blades are not required to be arranged, the structural complexity of the fan 100 is further reduced, the production cost of the fan 100 is also reduced, the efficiency of the fan 100 is improved, the power consumption is reduced, and the energy-saving effect is achieved.

In addition, since the extending direction of the straight line segment 132 is set, the scroll casing 120 is changed in the length and height directions, and the overall width of the scroll casing 120 of the fan 100 is not changed, so that compared with the existing scroll casing with equal width, the flow rate of the air discharged from the air outlet 124 is higher, and the fan 100 provided by the utility model can be suitable for use occasions with narrower space.

Specifically, fig. 4 shows a forward cross-sectional view of the volute 120, wherein the junction of the curved section 126 and the straight section 132 of the volute 120 is the point C in fig. 4, the length dimension of the straight section 132 is L in the figure, and the angle at which the straight section 132 extends offset is a in the figure. The total length of the curved section 126 and the straight section 132, the location of the connection point between the two, i.e., point C, the length of the straight section 132, i.e., specific value of L, and specific value of a may be determined by the designer according to the actual use requirements of the fan.

Specifically, the curved section 126 and the straight section 132 of the volute 120 are integrally configured, so that the overall structural strength of the volute 120 is higher and the service life is longer.

As shown in fig. 1 and 2, in some embodiments, the curved section 126 optionally includes a first sub-section 128, one end of which is connected to a straight section 132; the second sub-section 130 is connected with one end of the first sub-section 128, which is away from the straight-line section 132, and the other end of the second sub-section 130 forms the upper edge of the air outlet 124; along the air outlet direction of the fan 100, the second subsection 130 extends in a direction away from the axis of the air outlet 124.

In this embodiment, the curved section 126 specifically includes two curved sections, namely a first sub-section 128 and a second sub-section 130, where one end of the first sub-section 128 is connected to the straight line section 132, and the second sub-section 130 is connected to one end of the first sub-section 128 facing away from the straight line section 132, and as shown in fig. 1, the other end of the second sub-section 130 forms an upper edge of the air outlet 124, that is, the contour portion of the volute 120 in the present utility model starts from the upper edge of the air outlet 124, and is a curved second sub-section 130, and another curved first sub-section 128 and straight line section 132 that extend straight line.

Along the air outlet direction of the fan 100, the second subsection 130 extends in a direction away from the axis of the air outlet 124, that is, the utility model not only expands the lower edge of the air outlet 124, but also expands the upper edge of the air outlet 124. By the arrangement, the dimension of the air outlet 124 is enlarged in the height direction, and the flow rate of the fan 100 is improved.

In addition, the second subsection 130 extends along the air outlet direction of the fan 100 in a direction away from the axis of the air outlet 124, so that the air outlet 124 can be suitable for being installed with a large-sized pipeline or a bent pipeline, and the application range of the fan 100 provided by the utility model is further improved.

Optionally, a connecting sleeve 190 is provided at the air outlet 124 of the volute 120, so that the air outlet 124 is more convenient when connected with an external pipe.

As shown in fig. 1 and 2, in some embodiments, optionally, an angle is formed between the axis of the air outlet 124 and the axis of rotation of the impeller 110.

In this embodiment, when the impeller 110 is mounted in the accommodating cavity 122, an included angle is formed between the axis of the air outlet 124 and the rotation axis of the impeller 110, that is, the air outlet 124 is located on one side of the impeller 110.

Specifically, the included angle formed between the axis of the air outlet 124 and the rotation axis of the impeller 110 is 90 °, i.e. the axis of the air outlet 124 is perpendicular to the rotation axis of the impeller 110.

Through the arrangement between the axis of the air outlet 124 and the rotation axis of the impeller 110, the overall width of the fan 100 is smaller, and the impeller 110 and the volute 120 can be better matched, so that air entering the accommodating cavity 122 of the volute 120 is guided and collected, and air treatment is realized to generate air flow.

As shown in fig. 1, 2, and 5, in some embodiments, the volute 120 optionally further comprises: a first shell surface 134 connected to one side of the curved section 126 and the first straight section 132; the second shell surface 136 is opposite to the first shell surface 134 and is opposite to the volute 120, the second shell surface 136 is connected with the other sides of the bending section 126 and the straight section 132, and the distance between the second shell surface 136 and the first shell surface 134 is less than or equal to 0.8m.

In this embodiment, the volute 120 further includes a first housing face 134 and a second housing face 136, the second housing face 136 being opposite the first housing face 134 from the volute 120. The first casing surface 134 is connected to one side of the curved section 126 and the straight section 132, the second casing surface 136 is connected to the other side of the curved section 126 and the straight section 132, the first casing surface 134 and the second casing surface 136 are the front surface and the back surface of the volute 120, and the accommodating chamber 122 of the volute 120 is surrounded by the curved section 126, the straight section 132, the first casing surface 134 and the second casing surface 136.

The distance between the second housing surface 136 and the first housing surface 134 is less than or equal to 0.8m, and the overall width of the scroll casing 120 is smaller by limiting the size range between the front surface and the back surface of the scroll casing 120, so that the scroll casing 120 can be installed in a space with smaller width. Specifically, as shown in fig. 5, the distance D between the second shell surface 136 and the first shell surface 134 is less than or equal to 0.8m. Specifically, the first and second housing surfaces 134, 136 are perpendicular to the axis of rotation 140 of the impeller 110.

Specifically, the distance between the first shell surface 134 and the second shell surface 136 is 0.8m, the distance between the first shell surface 134 and the second shell surface 136 may also be 0.7m, and the distance between the first shell surface 134 and the second shell surface 136 may also be 0.65m.

Specifically, in this embodiment, the diameter of the impeller 110 is optionally subjected to an enlargement treatment, specifically an enlargement factor of 1.01 times. In the case that the distance between the first shell surface 134 and the second shell surface 136 is 0.8m, the diameter of the impeller 110 is 2100mm, the diameter of the impeller 110 is enlarged, the diameter of the impeller 110 is limited to be larger than 2100mm, and the diameter of the impeller 110 is smaller than or equal to 2121mm.

Through the above-mentioned impeller 110 diameter size setting, can make the size of impeller 110 bigger, and then further go through impeller 110 to promote the flow of air current, and can guarantee to leave the clearance between the inner shell face of impeller 110 and spiral case 120, avoid the two to produce the collision.

As shown in fig. 1 and 2, in some embodiments, optionally, the blower 100 further includes: the rotating shaft 140 is rotatably arranged in the volute 120, and at least part of the rotating shaft 140 is positioned in the accommodating cavity 122; the impeller 110 is sleeved on the rotating shaft 140 and can rotate synchronously with the rotating shaft 140.

In this embodiment, the fan 100 further includes a rotating shaft 140, where the rotating shaft 140 is a power transmission structure and is rotatably disposed in the volute 120, and at least part of the rotating shaft 140 is located in the accommodating cavity 122. Specifically, the blower 100 further includes a motor, and one end of the rotation shaft 140 located at the outer side of the accommodating chamber 122 may be connected to an output shaft of the motor, so as to be driven to rotate by the motor.

The impeller 110 is sleeved on the rotating shaft 140 and can rotate synchronously with the rotating shaft 140. By the arrangement of the rotating shaft 140, the impeller 110 is driven, so that air can be treated, and air flow is generated in the accommodating cavity 122 and discharged from the air outlet 124.

As shown in fig. 1 and 2, in some embodiments, optionally, the blower 100 further includes: a bracket 150 provided to the scroll case 120; the bearing housing 160 is provided to the bracket 150, and the rotation shaft 140 is inserted into an opening of the bearing housing 160.

In this embodiment, the blower 100 further includes a bracket 150 and a bearing housing 160, the bracket 150 being disposed to the volute 120, which is a structure for assisting other components of the blower 100 in mounting to the volute 120. The bearing housing 160 is provided to the bracket 150, and the rotation shaft 140 is inserted into an opening of the bearing housing 160. Through the support 150 and the bearing housing 160, the rotation shaft 140 can be stably arranged in the volute 120, and part of the rotation shaft is positioned in the accommodating cavity 122 and can rotate, so that the impeller 110 can be driven to work.

Specifically, the support 150 is disposed on the scroll casing 120 and located outside the accommodating cavity 122 disposed on the scroll casing 120, a connection hole is formed on the scroll casing 120 and is communicated with the accommodating cavity 122, and the rotating shaft 140 may be partially located in the accommodating cavity 122 through the connection hole.

Through the external setting of support 150 for bearing box 160 also can be corresponding external, and then conveniently install or maintain bearing box 160.

As shown in fig. 1 and 2, in some embodiments, optionally, the impeller 110 has an impeller exit angle of less than 90 °.

In this embodiment, the outlet angle of the impeller 110 is smaller than 90 °, that is, the impeller 110 provided by the utility model is a backward impeller, so as to prevent the impeller 110 from rolling up dust during rotation, and improve the dust-proof effect of the fan 100.

This application prevents impeller 110 from being infected with on-the-spot dust through setting up impeller outlet angle to impeller 110, has avoided destroying impeller 110's dynamic balance.

As shown in fig. 1 and 2, in some embodiments, optionally, the blower 100 further includes: the air inlet box 170 is arranged on the volute 120, an air inlet 172 is formed in the air inlet box 170, and the air inlet 172 is communicated with the accommodating cavity 122.

In this embodiment, the fan 100 further includes an air inlet box 170, the air inlet box 170 is disposed on the volute 120, an air inlet 172 is formed on the air inlet box 170, and the air inlet 172 is communicated with the accommodating cavity 122. By providing the inlet box 170, the air flow enters the accommodating cavity 122 from the air inlet 172, and then flows through the impeller 110 and is discharged from the air outlet 124 communicated with the accommodating cavity 122.

By the arrangement of the air inlet box 170, the air flow is guided to flow into the accommodating cavity 122 of the volute 120, the flow condition of the air flow entering the accommodating cavity 122 is improved, and the flow loss caused by uneven air flow entering the impeller 110 is reduced.

As shown in fig. 1 and 2, in some embodiments, optionally, the axis of the air intake 172 forms an angle with the axis of rotation of the impeller.

In this embodiment, an included angle is formed between the axis of the air inlet 172 and the rotation axis of the impeller 110, that is, the present utility model is a lateral air inlet arrangement, so that the overall width of the fan 100 is reduced on the basis of ensuring the air inlet amount, and the fan 100 is applicable to various use environments.

Specifically, the included angle between the axis of the air inlet 172 and the rotation axis of the impeller 110 is 90 °, i.e. the axis of the air inlet 172 is perpendicular to the rotation axis of the impeller 110. By the above arrangement, the air flow can be guided from radial to axial.

As shown in fig. 1 and 2, in some embodiments, optionally, the blower 100 further includes: the plurality of legs 180, a portion of the plurality of legs 180 are disposed on the volute 120 for mounting the volute 120, and another portion of the plurality of legs 180 are disposed on the air inlet box 170 for mounting the air inlet box 170.

In this embodiment, the fan 100 further includes a plurality of legs 180, where the plurality of legs 180 may be divided into two parts according to installation positions, specifically, one part of the legs 180 of the plurality of legs 180 is disposed on the volute 120 for installing the volute 120, and another part of the legs 180 of the plurality of legs 180 is disposed on the air inlet box 170 for installing the air inlet box 170.

By providing the plurality of legs 180 on the volute 120 and the air inlet box 170, respectively, a plurality of contact points are formed between the blower 100 and the ground or a foundation structure on which the blower 100 is installed when the blower 100 is installed, so that the stability of the blower 100 after installation is improved. Moreover, the supporting legs 180 are arranged on the volute 120 and the air inlet box 170, so that the air inlet box 170 and the volute 120 are supported, the phenomenon that the gravity center offset structure is unstable due to the fact that a single component is supported is avoided, and the working stability of the fan 100 is further improved.

In the present utility model, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A blower, comprising:

an impeller;

the spiral case is internally provided with a containing cavity, the spiral case is provided with an air outlet communicated with the containing cavity, the impeller is arranged in the containing cavity, and the impeller rotates to generate air flow and enables the air flow to be discharged from the air outlet;

the volute also comprises a bending section and a straight line section, one end of the straight line section is connected with the bending section, the bending section and the straight line section are enclosed into the accommodating cavity, and the other end of the straight line section forms the lower edge of the air outlet;

and the distance between the straight line section and the axis of the air outlet is gradually increased along the air outlet direction of the fan.

2. The wind turbine of claim 1, wherein the curved section comprises:

one end of the first sub-section is connected with the straight line section;

the second sub-section is connected with one end of the first sub-section, which is away from the straight line section, and the other end of the second sub-section forms the upper edge of the air outlet;

and the second subsection extends along the direction away from the axis of the air outlet along the air outlet direction of the fan.

3. The fan as claimed in claim 1, wherein,

an included angle is formed between the axis of the air outlet and the rotation axis of the impeller.

4. The blower of claim 3, wherein the volute further comprises:

the first shell surface is connected with one side of the bending section and one side of the straight line section;

the second shell surface is opposite to the first shell surface in two sides of the volute, and the second shell surface is connected with the other sides of the bending section and the straight line section;

the distance between the second shell surface and the first shell surface is less than or equal to 0.8m.

5. The blower of any one of claims 1-4, further comprising:

the rotating shaft is rotatably arranged in the volute, and at least part of the rotating shaft is positioned in the accommodating cavity;

the impeller is sleeved on the rotating shaft and can rotate synchronously with the rotating shaft.

6. The blower of claim 5, further comprising:

the bracket is arranged on the volute;

the bearing box is arranged on the support, and the rotating shaft penetrates through the opening of the bearing box.

7. The fan as recited in claim 5, wherein,

the impeller outlet angle of the impeller is smaller than 90 degrees.

8. The blower of any one of claims 1-4, further comprising:

the air inlet box is arranged in the volute, an air inlet is formed in the air inlet box, and the air inlet is communicated with the accommodating cavity.

9. The fan as claimed in claim 8, wherein,

an included angle is formed between the axis of the air inlet and the rotation axis of the impeller.

10. The blower of claim 8, further comprising:

the support legs are arranged on the volute, and part of the support legs are used for installing the volute;

and the other part of the supporting legs are arranged on the air inlet box and used for being installed by the air inlet box.