WO2013159424A1

WO2013159424A1 - Bladeless fan

Info

Publication number: WO2013159424A1
Application number: PCT/CN2012/076522
Authority: WO
Inventors: 岑建力
Original assignee: 余姚市华昌电器制造有限公司
Priority date: 2012-04-26
Filing date: 2012-06-06
Publication date: 2013-10-31

Abstract

A bladeless fan, comprising a wind channel (1), and a compressed air blower (2); the wind channel (1) is formed by abutting a first thimble (12) against a second thimble (11) in an axis direction; a cavity is formed between the two thimbles after abutting; the first thimble (12) is provided with wind outlets thereon; the wind outlets are uniformly disposed on the periphery of the first thimble (12); the wind outlets are divided into inner ring wind outlets (127) and outer ring wind outlets (126); the inner surface of the first thimble (12) gradually expands in the direction of the wind outlets; the casing (21) of the blower communicates with the wind channel (1); and after being compressed into the wind channel (1) by the compressed air blower (2), the airflow is discharged from the wind outlets. The bladeless fan is provided in an annular wind channel with wind outlets facing no protruding surfaces and directly ejecting an airflow, such that the airflow will not flow close to the protruding surfaces after exiting the wind outlets, thus flexibly satisfying the requirements for various airflows of different kinds and flowing directions.

Description

TECHNICAL FIELD The present invention relates to a fan, and more particularly to a bladeless fan. BACKGROUND OF THE INVENTION A fan with a fan blade needs to be provided with a cage-like net when it is used. The net is not only inefficient in manufacturing, high in cost, but also in safety performance, and is particularly dangerous for children. In the prior art, a bladeless fan is also used, that is, an annular air duct is used to replace the early fan fan. The air duct has an air outlet that points to one end of the air duct, and the air outlet has a convex surface to generate a negative pressure to attract The external airflow at the other end of the annular duct creates a function of airflow amplification. The above-mentioned bladeless fan for the air outlet bulging has the disadvantages of the prior art: although the surface of the annular air outlet protrusion can perform a certain airflow amplification, the surface of the protrusion needs to be based on materials and materials near the air outlet. There are many factors involved in the setting of the surface state that can be achieved and the flow rate of the airflow. Therefore, in practical applications, the amplification effect of the airflow is not very obvious, and the main source of the airflow is still the fan connected to the air duct; In order to meet the needs of airflow amplification, the air outlet of the air duct has a single structure, and the airflow with proper cross-sectional shape and flow direction cannot be output according to actual needs. Disclosure of the Invention The present invention is directed to overcoming the above-mentioned drawbacks of the prior art by flexibly adapting to various airflow shapes and flow directions by providing an air outlet on the non-convex surface of the annular duct.

To achieve the above object, the present invention provides a bladeless fan, comprising: a duct, which is formed by abutting the first collar and the second collar in an axial direction, and the first set of rings and the second set of rings are corresponding to each other. The annular groove forms a cavity between the two sets of rings after the docking. The first set of rings is provided with an air outlet, and the air outlet is evenly arranged along the circumference of the first ring, and the air outlet is divided into a ring inner ring air outlet and outer a ring outlet, the surface of the inner portion of the annular groove of the first ring is gradually enlarged toward the air outlet; the air blower fan, the fan casing is connected to the air passage, and the air flow is pressed by the air compressor fan After entering the air duct, it is discharged through the air outlet. In the above technical solution, the surface of the inner portion of the annular groove of the first set of rings may be a smooth and gradually enlarged tapered surface. In the above technical solution, the surface of the inner portion of the annular groove of the first set of rings may also be a stepped and gradually enlarged tapered surface. In the above technical solution, the inner ring air outlet and the outer ring air outlet are separated by an annular divided sheet, and the divided sheets are integrally connected with the first ring by the radial ribs arranged at equal intervals along the circumferential direction of the sheet, and the inclined of the divided sheets The angle is set according to the preset air direction. In the above technical solution, the surface of the inner portion of the annular groove of the first set of rings may be evenly spaced along the circumferential direction to provide an auxiliary air outlet. In the above technical solution, the inner ring air outlet and the outer ring air outlet are respectively disposed on the transition surface between the stepped and gradually enlarged tapered surfaces, and the air outlets of the same ring are evenly spaced apart. In the above technical solution, the air outlets corresponding to the inner and outer rings are staggered, so that the airflow between the inner and outer rings is less likely to interfere with each other, especially if the airflows of the inner and outer ring air outlets interfere. Compared with the prior art, the present invention flexibly adapts to various airflow shapes and flow directions after the airflow is separated from the air outlet by the air outlet of the direct airflow of the annular air passage. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an exploded perspective view of a duct of Embodiment 1 of a bladeless fan of the present invention (a rear view); FIG. 2 is a front cross-sectional view of a duct of Embodiment 1 of the bladeless fan of the present invention; FIG. 4 is a front cross-sectional view of the duct of Embodiment 2 of the bladeless fan of the present invention; FIG. 5 is an exploded perspective view of the duct of Embodiment 3 of the bladeless fan of the present invention; (Front view); Fig. 6 is a front cross-sectional view showing the air passage of the third embodiment of the bladeless fan of the present invention; Figure 7 is an exploded perspective view of the bladeless fan embodiment 1 of the present invention (including a duct, a fan, a first centrifugal impeller, a base, etc.); Figure 8 is a perspective view of a second centrifugal impeller of the bladeless fan embodiment 1 of the present invention; Figure 9 is a cross-sectional view taken along line AA of Figure 8; Figure 10 is a front cross-sectional view (double impeller, without a base) of the bladeless fan embodiment 1 of the present invention; Figure 11 is a front cross-sectional view of the bladeless fan embodiment 1 of the present invention (single view) Figure 12 is a perspective view of the bladeless fan embodiment 1 of the present invention (the base is a fixed clip); Figure 13 is a perspective view of the bladeless fan embodiment 1 of the present invention (the base is a suction disk); A perspective view of the bladeless fan embodiment 1 (the base is a horizontally rotatable fixed disk). The reference numerals marked in the above figures are:

1-air duct, 11-second collar, 12-first collar, 121-shell, 121a-shell, 122- divider, 123-first rib, 124-second rib, 125-air inlet , 126-outer ring air outlet, 126a-outer ring air outlet, 127-inner ring air outlet, 127a-inner ring air outlet, 128b-assisted air outlet, 2-fan, 2a-single impeller fan, 21-chassis, 211-connection bayonet, 212-guide vane, 213- guide cone, 22-drive motor, 221-rotor, 23-impeller, 23a-impeller, 231a-impeller air inlet, 232a-blade, 24-chasole air inlet, 25-base, 251-pitch adjustment groove, 252-circular guide surface, 253-shaft, 3-fixing clamp, 3a-fixed suction cup, 3b-horizontal steering mount, 31-cylinder, 32- horizontal rotary adjustment shaft , 32b - horizontal rotation adjustment shaft, 33 - pitch rotation adjustment shaft. The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it is understood that the scope of the present invention is not limited by the specific embodiments. Embodiment 1 The air duct of the embodiment 1 of the bladeless fan of the present invention is as shown in FIG. 1 and FIG. 2, that is, the air duct 1 is formed by the first collar 12 and the second collar 11 being axially butted and fastened. Collar 12, second collar 11 The annular grooves corresponding to each other form a cavity inside the two rings after docking, and the whole ring is annular after the butting, the first ring 12 has an air outlet, and the air outlet surrounds the first ring 12 and is evenly spaced. And facing the side to be blown. The first set of rings 12 is divided into a casing 121 and an inner casing (see Fig. 1). The casing 121 and the inner casing constitute an annular groove of the first collar 12, and the inner casing constitutes the inner portion of the annular groove of the first collar 12. The surface of the air outlet is disposed around a circular arc connecting surface between the outer casing 121 of the first collar 12 and the inner side surface. The outer casing 121 and the inner bore are integrally formed by the equally spaced radial ribs, and a split sheet 122 is disposed circumferentially along the first collar, the split sheet 122 dividing the radial rib into the first rib 123 and the second The ribs 124 form a double-layer air outlet, that is, an inner ring air outlet 127 and an outer ring air outlet 126 (see FIG. 2). The split sheet 122 is disposed parallel to the axis, and may also be a tapered arrangement forming an angle with the axis. In order to correspond to the flow direction of the corresponding outlet airflow. The inner surface of the inner ring of the first set of rings 12 is a tapered surface that gradually enlarges toward the air outlet. Further, as shown in FIGS. 1, 2, 7, and 10, the fan 2 according to the first embodiment is connected to the air inlet 125 of the air duct through the connection port, and the airflow is pressed into the air duct by the fan 2 and then discharged through the air outlet. Further, as shown in FIGS. 7 and 10, the casing 21 of the fan 2 is a horizontally thin cylindrical thin casing, and a driving motor 22 is mounted in the casing 21, and the driving motor 22 has a double output shaft 221 at both ends (see FIG. 10). The axis of the rotating shaft 221 is coincident with or the same as the axis of the cylindrical thin casing of the casing 21, and the rotating shaft 221 protrudes from both ends of the motor 22 and is located in the casing 21. The impeller 23 has a centrifugal structure and is generally cylindrical. The circumferential surface of the impeller 23 is provided with a centrifugal blade impeller 23, and the number of the impellers 23 is two, which are respectively fastened to the motor shaft 221 located in the casing, and the air inlet of the impeller 23 is The air inlets 24 are provided at both ends of the cylindrical casing 21, and the air inlets 24 of the casing 21 are radially-shaped elongated through holes (see FIG. 7) or a honeycomb through-hole array. The airflow horizontally entering from the air inlet 24 of the casing 21 is driven by the impeller 23 to enter the annular duct 1 through the air inlet 125 of the duct 1, and is then blown through the outer ring air outlet 126 and the inner ring air outlet 127. In order to guide the airflow entering the air duct, the air outlet of the casing 21 has a circular structure, and the outer surface of the air outlet of the fan casing 21 is provided with a connection bayonet 211 fixed to the air duct 1, and the air outlet of the casing 21 is provided. The guide vane 212 is embedded, and the center of the guide vane 212 faces the air duct 1 and is provided with a convex guide cone 213. The circular frame of the guide vane 212 is matched with the inner surface of the circular air outlet of the fan casing 21. Further, as shown in Figs. 8, 9, the impeller 23 can also use an alternative impeller 23a having an axially projecting air inlet 231a (see Fig. 8) and a centripetal curved arcuate blade 232a (see Fig. 9). Of course, other similar impeller designs can be used as long as the air flow is introduced into the air duct. The bladeless fan of the present invention is portable so that its support can be designed in a variety of configurations. As shown in Fig. 7, the bladeless fan can be placed or sucked on the flat table top or other smooth surface by the mounting base 25. The base has a pitch adjustment groove 251 and a circular arc guiding surface 252, so that the air outlet axis can be adjusted for the pitch angle. . As shown in Fig. 12, a connecting arm can also be fixed at the rear of the casing 21, and the fan is fixed by the fixing clip 3, that is, the fixing clip 31 is provided at the end of the connecting arm. As shown in Fig. 13, it can also be fixed using a suction cup base 3a having a horizontal rotation adjustment shaft 32 and a pitch rotation adjustment shaft 33 which can fix the bladeless fan on a vertical smooth plane. As shown in FIG. 14, the fan casing 21 can be stably placed through the horizontal steering mount 3b and the horizontal plane, and the horizontal rotation adjusting shaft 32b is inserted into the fan casing 21, and the casing 21 can be adjusted around the horizontal rotation adjusting shaft 32b. Horizontal rotation angle. Further, as shown in FIG. 11, in the case where the air volume demand is not large, a single impeller fan may be used, that is, the single impeller fan 2a is connected to the air duct 1 to provide a wind source for the air duct, and the fan 2a has only a single air inlet. It is suitable for the fanless fan with less air volume requirement, and its balance is not as good as that of the double fan structure; the fan casing can be connected with the base 25 through the bottom of the integrally formed casing, and the connection can be realized through the rotating shaft 253 and the pitch angle can be adjusted. Of course, it can also be fixed by other connection methods as described above. Embodiment 2 The embodiment 2 is different from the embodiment 1 in that the first collar 12a and the second collar 11a of the air duct la are connected, wherein the outer casing 121a of the first ring 12a is annularly concave. The inner surface of the groove adopts a stepped stepwise enlarged tapered surface, and the air outlet is an inner ring air outlet 127a and an outer ring air outlet 126a which are arranged at intervals around the axis, and the inner and outer ring air outlets are respectively arranged in the first set. The transition surface of the tapered surface of the stepped ring of the ring 12a is stepwisely expanded, so that the air outlets 127a and 126a are alternately arranged adjacent to each other in order to make the air outlet more uniform (due to the sectional position) The limitation of the inner ring air outlet 127a can only be shown in FIG. Example 3 Embodiment 3 is as shown in FIGS. 5 and 6, that is, an auxiliary air outlet is added on the basis of the first embodiment, and an auxiliary air outlet 128b is provided on the tapered surface of the inner portion of the annular groove of the first collar of the air duct 1. The auxiliary air outlets 128b are equally spaced around the inner tapered surface of the first collar. The auxiliary air outlet is provided with a through hole on the inner side surface of the first collar, and a guide wall having a shape shown in the figure is arranged at the port of the through hole, so that the wind direction of the auxiliary air outlet is consistent with the wind direction of the aforementioned conventional air outlet. The invention provides an air outlet directly discharging the airflow on the non-raised surface of the annular air passage, so that the airflow is not attached to the surface of the protrusion after being separated from the air outlet, and can flexibly adapt to various airflow shapes and flow directions. . The above disclosure is only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be made by those skilled in the art should fall within the protection scope of the present invention.

Claims

Claim

A leafless fan, comprising:

The air duct is formed by abutting the first ring and the second ring in the axial direction, and the first ring and the second ring are mutually corresponding annular grooves, and a cavity is formed between the two rings after the butting. The first collar is provided with an air outlet, and the air outlet is circumferentially hooked along the first collar; the air outlet is divided into an annular inner ring air outlet and an outer ring air outlet; the first sleeve inner ring groove inner side Part of the surface is in a gradually expanding state facing the air outlet;

The air blower fan is connected to the air duct, and the air flow is pressed into the air duct by the air blower fan and discharged through the air outlet.

The bladeless fan according to claim 1, wherein a surface of the inner portion of the annular groove of the first collar is a tapered surface that is smoothly tapered.

3. The leafless fan according to claim 1, wherein: the first collar

The bladeless fan according to claim 2, wherein the air outlet is disposed on an axial end surface of the annular groove of the first collar.

5. The leafless fan according to claim 4, wherein the inner ring air outlet and the outer ring air outlet are separated by an annular divided sheet, and the divided sheets are radially arranged at equal intervals along the circumferential direction of the sheet. The rib is integrally connected with the first collar, and the inclination angle of the divided sheet is set according to a preset outlet direction.

The bladeless fan according to claim 5, wherein a surface of the inner portion of the annular groove of the first collar is evenly spaced apart from the auxiliary air outlet in the circumferential direction.

The bladeless fan according to claim 3, wherein the inner ring air outlet and the outer ring air outlet are respectively disposed on a transition surface between the stepped and stepped enlarged tapered surfaces, and The air outlets of the same ring are evenly spaced apart.

The bladeless fan according to claim 7, wherein the air outlets corresponding to the inner and outer rings are alternately arranged.