CN219412960U - Self-opening and closing axial flow fan - Google Patents

Abstract

The utility model relates to the technical field of axial flow fans, in particular to a self-opening and closing axial flow fan, which comprises an outer cylinder and an inner cylinder arranged in the outer cylinder, wherein at least two guide vanes are arranged between the inner cylinder and the outer cylinder, an air channel is formed between the adjacent guide vanes, a motor is arranged in the inner cylinder, an output shaft of the motor penetrates out of the bottom of the inner cylinder, an impeller is arranged on the output shaft, a guide sleeve is arranged at the top of the inner cylinder, a sliding cylinder which is in sliding fit with the guide sleeve up and down is arranged in the guide sleeve, and a rain cap covering the top of the outer cylinder is arranged at the top of the sliding cylinder; the motor starts to drive the impeller to rotate, the impeller blows, gas rises from the air channel to exhaust, the rain cap rises under the action of wind pressure to realize indoor exhaust and fire-fighting high-temperature smoke exhaust, and after the motor is closed, the rain cap falls under the action of gravity to cover the top of the outer barrel so as to prevent outdoor rainwater and air backflow.

Description

Self-opening and closing axial flow fan

Technical Field

The utility model relates to the technical field of axial flow fans, in particular to a self-opening and self-closing axial flow fan.

Background

The fan is a general machine for gas transportation with various and wide application, and the main principle is to convert mechanical energy into energy of gas flow. According to the principle of energy conversion, the fans can be divided into positive displacement fans, turbine fans and jet fans, wherein the positive displacement fans mainly comprise reciprocating fans, rotary fans and the like, and the turbine fans mainly comprise centrifugal fans, axial flow fans, mixed flow fans, cross flow fans and the like. The axial flow fan is of a fan type which is simple in structure and wide in application.

In reality, there are often dust, oil mist and other polluted air, for example, in these tall factory buildings, the air needs to be purified faster, the pollution is removed, and the air backflow needs to be prevented after the fan is stopped, the rain hat in the existing axial flow fan is generally fixed, the air outlet cannot be covered after the fan is stopped, the air backflow cannot be prevented, and a mode of driving the rain hat to lift by the driving device is provided, for example, the novel shallow circular bin roof ventilator disclosed in the Chinese patent application number 202121665694.2 is provided, the cover plate 2 is driven to lift by the electric telescopic rod 3, so that the air outlet is closed when the fan is closed, the production cost and the electricity cost are increased undoubtedly, and the self-opening and self-closing axial flow fan is provided to solve the problem.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent.

The utility model provides a self-opening and closing axial flow fan which comprises an outer cylinder and an inner cylinder arranged in the outer cylinder, wherein at least two guide vanes are arranged between the inner cylinder and the outer cylinder, an air channel is formed between the adjacent guide vanes, a motor is arranged in the inner cylinder, an output shaft of the motor penetrates out of the bottom of the inner cylinder, an impeller is arranged on the output shaft, a guide sleeve is arranged at the top of the inner cylinder, a sliding cylinder which is in sliding fit with the guide sleeve up and down is arranged in the guide sleeve, and a rain cap covering the top of the outer cylinder is arranged at the top of the sliding cylinder.

Preferably, the side of the sliding cylinder is provided with a plurality of vertically arranged sliding holes in a surrounding mode, the guide sleeve is provided with a plurality of limiting columns corresponding to the sliding holes, and the inner ends of the limiting columns are inserted into the sliding holes.

Preferably, the guide vane is in the shape of a spiral arc.

Preferably, the outer cylinder is also provided with a conduit, one end of the conduit penetrates out of the outer cylinder, and the other end penetrates into the inner cylinder.

Preferably, the other end of the output shaft of the motor is provided with a heat dissipation fan blade.

The scheme of the utility model at least comprises the following beneficial effects:

the utility model relates to a self-opening and closing axial flow fan; through setting up the rain cap, when starting the motor, the motor drives the impeller and rotates, and the impeller blows, and gaseous rising exhaust from the wind channel, the rain cap then rises under the effect of wind pressure, realizes indoor exhaust, fire control high temperature and discharges fume, closes the motor after, and the rain cap then descends under the effect of gravity, covers the top of urceolus, can prevent outdoor rainwater and prevent the air backflow.

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

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic exploded view of the present utility model.

Fig. 3 is a schematic view of the structure of the rain cap according to the present utility model.

In the figure: 1. an outer cylinder; 2. an inner cylinder; 3. a deflector; 4. a motor; 5. an impeller; 6. guide sleeve; 7. a sliding cylinder; 8. a rain cap; 10. a sliding hole; 11. a limit column; 12. a conduit; 13. and the heat dissipation fan blade.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present utility model and should not be construed as limiting the utility model, and all other embodiments, based on the embodiments of the present utility model, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited 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; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. 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 present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings

Referring to fig. 1 to 3, in the embodiment of the utility model, a self-opening and closing axial flow fan comprises an outer cylinder 1 and an inner cylinder 2 arranged in the outer cylinder 1, at least two guide plates 3 are arranged between the inner cylinder 2 and the outer cylinder 1, the guide plates 3 also play a role in fixing the inner cylinder 2, an air channel is formed between the adjacent guide plates 3, a motor 4 is arranged in the inner cylinder 2, an output shaft of the motor 4 penetrates out of the bottom of the inner cylinder 2, an impeller 5 is arranged on the output shaft, a guide sleeve 6 is arranged at the top of the inner cylinder 2, a sliding cylinder 7 in sliding fit with the guide sleeve 6 up and down is arranged in the guide sleeve 6, and a rain cap 8 covering the top of the outer cylinder 1 is arranged at the top of the sliding cylinder 7; when the device is used, the whole device is arranged on a roof, the motor 4 is started to drive the impeller 5 to rotate, the impeller 5 blows, gas rises from the air channel to exhaust, the rain cap 8 rises under the action of wind pressure, indoor exhaust and fire-fighting high-temperature smoke exhaust are realized, after the motor 4 is closed, the rain cap 8 falls under the action of gravity to cover the top of the outer cylinder 1, so that outdoor rainwater is prevented and air backflow is prevented.

Further, the side of the sliding barrel 7 is provided with a plurality of vertically arranged sliding holes 10 in a surrounding mode, the guide sleeve 6 is provided with a plurality of limiting columns 11 corresponding to the sliding holes 10, the inner ends of the limiting columns 11 are inserted into the sliding holes 10, when the rain hat 8 ascends, the limiting columns 11 limit the rain hat 8, and after the rain hat 8 falls down, the lower portion of the sliding barrel 7 falls into the top of the inner barrel 2.

Further, the guide vane 3 is in a rotating arc shape, the guide vane 3 is arranged into a rotating arc shape, and the air duct is also in a rotating arc shape, so that the air flow is convenient to be discharged outwards after contacting the rain cap 8.

Furthermore, the outer cylinder 1 is also provided with a conduit 12, one end of the conduit 12 penetrates out of the outer cylinder 1, and the other end penetrates into the inner cylinder 2; the provision of the conduit 12 may facilitate the installation of wiring.

Further, a heat dissipation fan blade 13 is arranged at the other end of the output shaft of the motor 4, and the heat dissipation fan blade 13 is arranged to facilitate heat dissipation of the motor 4.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (5)

1. The utility model provides a self-opening and closing axial fan, its characterized in that, it includes urceolus and the inner tube of setting in the urceolus, is equipped with two at least water conservancy diversion pieces between inner tube and the urceolus, forms the wind channel between the adjacent water conservancy diversion piece, is provided with the motor in the inner tube, and the bottom of inner tube is worn out to the output shaft of motor to be equipped with the impeller on the output shaft, the top of inner tube is equipped with the guide pin bushing, be provided with in the guide pin bushing with its upper and lower sliding fit's sliding tube, sliding tube top is provided with the rain cap that covers the urceolus top.

2. The self-opening and closing axial flow fan as claimed in claim 1, wherein a plurality of vertically arranged sliding holes are formed around the side edge of the sliding cylinder, a plurality of limit posts corresponding to the sliding holes are arranged on the guide sleeve, and the inner ends of the limit posts are inserted into the sliding holes.

3. The self-opening and closing axial flow fan as recited in claim 1, wherein the guide vane is in a spiral arc shape.

4. The self-opening and closing axial flow fan as recited in claim 1, wherein the outer cylinder is further provided with a conduit, one end of the conduit passes out of the outer cylinder, and the other end of the conduit passes into the inner cylinder.

5. The self-opening and closing axial flow fan as recited in claim 1, wherein a heat dissipation fan blade is arranged at the other end of the output shaft of the motor.