CN211623668U

CN211623668U - Bladeless fan

Info

Publication number: CN211623668U
Application number: CN201922335394.7U
Authority: CN
Inventors: 曲铭凯; 赵桂萍
Original assignee: Hangzhou Tanbu Technology Co ltd
Current assignee: Ma Jinyu
Priority date: 2019-01-29
Filing date: 2019-12-23
Publication date: 2020-10-02
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a bladeless fan, which comprises a base and a shell rotatably connected to the base; the middle part of the shell is rotationally connected with a first fan blade driven by a motor; an air outlet seam is arranged on the periphery of the front end of the shell; the periphery of the shell comprises two ventilation cavities, and the air outlet seam comprises a left air outlet seam and a right air outlet seam which are respectively and correspondingly communicated with the two ventilation cavities; when the left air outlet seam and the right air outlet seam blow out airflow with different speeds, the shell can rotate relative to the base; the shell also comprises a valve plate containing pipe which is communicated with the main frame sleeve and the two vent cavities, and the valve plate containing pipe is internally provided with an air inlet which is respectively communicated with the two vent cavities; the valve plate containing pipe is rotatably provided with a rotating valve plate, the rotating valve plate is provided with a vent valve groove which changes the opening degree of the two air inlets in the rotating process of the rotating valve plate, and the opening degree of the two air inlets is reversely changed at the same time, so that the left air outlet seam and the right air outlet seam can blow out air flows with different speeds, and the shell rotates relative to the base.

Description

Bladeless fan

Technical Field

The invention belongs to the technical field of fans, and particularly relates to a bladeless fan.

Background

Chinese patent document No. CN101852214A discloses a fan assembly for forming an air flow and a portable upright fan, the fan assembly comprising a base (12) having an air inlet (20) and an air outlet (88), the base housing an impeller (64) and a motor (68) for rotating the impeller to form an air flow flowing from the air inlet to the air outlet. The fan assembly also includes a vertically oriented elongate annular nozzle (14) having an interior passage (94) with an air inlet (102) for receiving the air flow from the base and a mouth (26) for emitting the air flow, the nozzle defining an opening (24) through which air from outside the fan assembly is drawn by the air flow emitted from the mouth.

In the above-mentioned patent, set up the impeller in the basal portion that is located the bottom surface upper end for impeller and air inlet are nearer apart from the bottom surface, and at the impeller during operation, in the impeller inhales the basal portion with the air of bottom surface top, and at this in-process, the air current will curl up the dust of bottom surface, causes the convenient puzzlement of breathing to the user easily, influences user's use, has more serious harm to having being used for of respiratory disease.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the defects in the prior art, the bladeless fan with the impeller far away from the bottom surface and the dust not easy to roll is provided.

In order to realize the purpose of the invention, the following technical scheme is adopted for realizing the purpose: a bladeless fan comprises a base and a shell which is rotatably connected to the base.

The casing is including the annular cover of giving vent to anger, is located the host computer cover of the internal week of the cover of giving vent to anger to a plurality of intercommunication host computer cover and the breather pipe of the cover of giving vent to anger.

And a fan for supplying air to the direction of the vent pipe is arranged in the main frame sleeve.

The front end of the air outlet sleeve is provided with an air outlet seam.

And an air inlet is formed in the rear end of the main machine sleeve.

The air outlet sleeve comprises two air vent cavities, and the main machine sleeve is communicated with each air vent cavity through more than one air vent pipe; and the front end of the air outlet sleeve is provided with a left air outlet seam and a right air outlet seam which are respectively and correspondingly communicated with the two ventilation cavities.

When the left air outlet seam and the right air outlet seam blow out airflow with different speeds, the shell can rotate relative to the base;

the casing still includes a intercommunication host computer cover and two valve block of ventilating the chamber and holds the pipe, the valve block holds the intraductal air intake that has and ventilate the chamber respectively and communicate with two.

The valve plate containing pipe is rotatably provided with a rotating valve plate, and the rotating valve plate is driven by airflow generated by the first fan blade or a motor; and the rotary valve plate is provided with a vent valve groove for changing the opening degree of the two air inlets in the rotating process of the rotary valve plate, and the opening degrees of the two air inlets are reversely changed at the same time, so that the left air outlet seam and the right air outlet seam can blow out airflow at different speeds.

As an optimization scheme: an upper baffle plate is formed at the upper part of the air outlet sleeve, and a lower baffle plate is formed at the lower part of the air outlet sleeve; the upper baffle plate and the lower baffle plate divide the air outlet sleeve into two air vent cavities.

The lower partition plate is positioned at the lower end of the valve plate containing pipe and divides the lower port of the valve plate containing pipe into two air inlets.

The valve plate containing pipe is rotatably connected with a driven fan blade which is driven by airflow generated by the first fan blade to drive the rotating valve plate to rotate.

As an optimization scheme: the middle part of the inner wall of the valve plate accommodating pipe is fixedly connected with a gear positioning frame; and a driving gear positioned at the upper end of the lower positioning ring is formed at the lower end of the driven fan blade.

The upper end of the gear positioning frame is rotatably connected with a first reduction gear in meshing transmission connection with the driving gear; the diameter of the driving gear is smaller than that of the first reduction gear; a second reducing gear which is coaxially arranged and is rotationally inserted with the gear positioning frame is formed at the lower end of the first reducing gear; the lower end of the second reduction gear extends to the lower part of the gear positioning frame.

An inner gear in meshing transmission connection with the second reduction gear is formed at the upper end of the rotary valve plate; the diameter of the second reduction gear is smaller than that of the internal gear.

As an optimization scheme: a lower positioning ring is formed at the lower part of the inner wall of the valve plate containing pipe; and the upper end of the lower positioning ring is provided with a lower positioning frame.

The rotating valve plate is rotatably connected to the upper end of the lower positioning frame.

Two lower positioning insertion plates which are arranged in parallel are formed at the lower end of the lower positioning frame.

As an optimization scheme: a shell positioning groove is formed in the center of the upper end of the base; a shell positioning shaft which is rotationally inserted with the shell positioning groove is formed at the lower end of the air outlet sleeve; and a bearing is arranged between the outer wall of the shell positioning shaft and the inner wall of the shell positioning groove.

The lower part of the shell positioning shaft extends into the base; the lower part of the shell positioning shaft is in threaded connection with a nut;

the lower end of the outer wall of the gas outlet sleeve is positioned on the periphery of the positioning shaft of the shell and is provided with a lower positioning sleeve; and the upper end of the base is formed with a base upper convex ring which is rotationally inserted with the lower positioning sleeve.

A limiting groove is formed at the upper end of the upper convex ring of the base; the included angle of the two ends of the limiting groove is less than or equal to 180 degrees; the inner wall of the lower locating sleeve is formed with a limiting convex strip which can move in the range of the limiting groove.

As an optimization scheme: the upper part of the valve plate containing pipe is fixedly connected with an upper positioning frame; and a positioning sleeve which is rotatably inserted with the driven fan blade is formed in the center of the lower end of the upper positioning frame.

A second wiring groove for a lead of the motor to pass through is formed at the upper end of the upper positioning frame; the shaping of host computer cover lateral wall has the first wiring groove with second wiring groove intercommunication.

Compared with the prior art, the invention has the beneficial effects that: the user presses down the power key, and the motor drives first fan blade and rotates, and outside air gets into the host computer cover through the back lid, and in each breather pipe gets into the air outlet sleeve to spout from the seam of giving vent to anger.

At the in-process that the valve block was held in the gas flow, the air current got into two ventilations respectively through the valve groove of ventilating, because the valve groove of ventilating is different with the relative area of each air intake for the flow that gets into each air current of ventilating the intracavity through the valve groove of ventilating is different, and the atmospheric pressure in two ventilations is different, when the air current was from giving vent to anger the seam blowout, the air current was to the effort variation in size of the casing left and right sides, made the casing left and right sides produce the pressure differential, and then made the casing rotate along casing location axle.

Meanwhile, the driven fan blades are driven to rotate by the airflow, so that the rotating valve plates are driven to rotate, and the opening degree of each air inlet is changed.

When the rotating valve plate rotates until the pressure in the left air vent cavity is higher than the pressure in the right air vent cavity, the shell rotates clockwise.

When the rotating valve plate rotates until the pressure in the left vent cavity is lower than the pressure in the right vent cavity, the shell rotates anticlockwise.

Driven fan blade lasts and drives the rotation valve piece and rotate for the casing carries out reciprocating rotation along the spacing groove, and then the direction of periodic change air-out, increase the scope of blowing.

According to the invention, the acting forces of the airflows flowing out of the left side and the right side of the shell on the shell are different due to different air flow speeds blown out from the two air outlet seams, so that the whole shell generates torque, and the shell rotates clockwise or anticlockwise.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic cross-sectional structure of the present invention.

Fig. 3 is a schematic exploded view of the present invention.

Fig. 4 is an enlarged schematic view of the portion a of fig. 3 according to the present invention.

Fig. 5, 6 and 7 are schematic structural views of the shell of the invention.

Fig. 8 is a schematic structural view of the base of the present invention.

FIG. 9 is a schematic structural diagram of the rotary valve plate of the present invention.

Fig. 10 is a schematic structural diagram of a driven fan blade according to the present invention.

Fig. 11 is a schematic sectional structure diagram of embodiment 2 of the present invention.

Fig. 12 is an enlarged schematic view of the portion B of fig. 11 according to the present invention.

FIG. 13 is an exploded view of the gear portion in embodiment 2 of the present invention.

Fig. 14 is a schematic structural view of the rotary valve plate in embodiment 2 of the present invention.

Fig. 15 is a schematic structural view of a lower spacer in embodiment 2 of the present invention.

1. A housing; 1a, a front shell; 1b, a rear shell; 10. a bearing; 11. a main machine sleeve; 111. a first wiring groove; 112. an upper positioning ring; 113. an air inlet; 114. a lower positioning ring; 115. positioning rings; 12. an air outlet sleeve; 121. gas outlet seam; 122. an upper partition plate; 123. a lower partition plate; 13. a breather pipe; 14. valve plate accommodating pipe; 15. a lower positioning sleeve; 151. limiting convex strips; 152. a housing positioning shaft; 2. a base; 20. a chassis; 21. a convex ring is arranged on the base; 211. a limiting groove; 22. a housing positioning groove; 3. a motor; 4. a first fan blade; 40. a rear cover; 5. driven fan blades; 51. a drive gear; 6. rotating the valve plate; 61. a vent valve spool; 62. an internal gear; 63. a valve plate positioning groove; 64. adsorbing a magnet; 71. an upper positioning frame; 711. a second wiring groove; 712. an upper positioning groove; 713. a positioning sleeve; 72. a gear positioning frame; 73. a lower positioning frame; 731. a lower positioning plug board; 732. positioning a magnet; 741. a first reduction gear; 742. a second reduction gear; 81. a third reduction gear; 82. a fourth reduction gear; 83. a torsion spring.

Detailed Description

Example 1

Referring to fig. 1 to 10, the bladeless fan of the present embodiment includes a base 2 and a housing 1 rotatably connected to the base.

The casing comprises an annular air outlet sleeve 12, a main machine sleeve 11 positioned on the inner periphery of the air outlet sleeve, and a plurality of vent pipes 13 communicated with the main machine sleeve and the air outlet sleeve.

A fan for supplying air to the direction of the vent pipe is arranged in the main frame sleeve; the fan comprises a motor 3 fixedly connected in the main engine sleeve and a first fan blade 4 fixedly connected on an output shaft of the motor.

The front end of the air outlet sleeve is provided with an air outlet slit 121.

The rear end of the main frame sleeve is provided with an air inlet 113; the main machine sleeve is fixedly connected with a rear cover 40 at the air inlet; the rear cover is uniformly provided with air inlet holes.

the casing still includes a intercommunication main frame cover and two valve block of ventilating the chamber and hold pipe 14, the valve block holds the intraductal air intake that has and two ventilate the chamber and communicate respectively.

A rotating valve plate 6 is rotatably arranged in the valve plate accommodating pipe and is driven by airflow generated by the first fan blade; and the rotary valve plate is provided with a vent valve groove 61 for changing the opening degree of the two air inlets in the rotating process of the rotary valve plate, and the opening degrees of the two air inlets are reversely changed at the same time, so that the left air outlet seam and the right air outlet seam can blow air flows at different speeds.

An upper baffle plate 122 is formed at the upper part of the air outlet sleeve, and a lower baffle plate 123 is formed at the lower part of the air outlet sleeve; the upper baffle plate and the lower baffle plate divide the air outlet sleeve into two air vent cavities.

And the valve plate containing pipe is rotatably connected with a driven fan blade 5 which is driven by the airflow generated by the first fan blade to drive the rotating valve plate to rotate.

The air inlet corresponding to the left air outlet seam is a left air inlet, and the air inlet corresponding to the right air outlet seam is a right air inlet.

When the motor works and the airflow generated by the first fan blade drives the rotating valve plate to rotate, the air inlet areas of the air vent valve grooves corresponding to the air inlets are changed, the airflow entering the two air vent cavities is changed, and the airflow speeds blown out from the left air outlet seam and the right air outlet seam are changed.

When the rotary valve plate rotates to the state that the opening degree of the left air inlet is larger than that of the right air inlet, the air flow speed blown out from the left air outlet slit is larger than that blown out from the right air outlet slit, the acting force exerted on the left side of the shell is larger than that exerted on the right side of the shell, the shell generates positive torque, and the shell rotates clockwise.

When the rotating valve plate rotates to the position that the opening degree of the right air inlet is larger than that of the left air inlet, the air flow speed blown out from the right air outlet slit is larger than that blown out from the left air outlet slit, the acting force exerted on the right side of the shell is larger than that exerted on the left side of the shell, the shell generates reverse torque, and the shell rotates anticlockwise.

The middle part of the inner wall of the valve plate accommodating pipe is fixedly connected with a gear positioning frame 72; and a driving gear 51 positioned at the upper end of the lower positioning ring is formed at the lower end of the driven fan blade.

The upper end of the gear positioning frame is rotatably connected with a first reduction gear 741 in meshing transmission connection with the driving gear; the diameter of the driving gear is smaller than that of the first reduction gear; a second reducing gear 742 which is coaxially arranged and is rotationally inserted with the gear positioning frame is formed at the lower end of the first reducing gear; the lower end of the second reduction gear extends to the lower part of the gear positioning frame.

An inner gear 62 in meshing transmission connection with the second reduction gear is formed at the upper end of the rotary valve plate; the diameter of the second reduction gear is smaller than that of the internal gear.

The air flow generated by the rotation of the first fan blade drives the driven fan blade to rotate, and the rotating valve plate can rotate at a slower speed after the speed of the first speed reduction gear and the second speed reduction gear is reduced.

A gear rack positioning groove is formed in the side wall of the gear positioning frame; and a positioning ring 115 which is fixedly inserted with the gear rack positioning groove is formed in the middle of the inner wall of the valve plate containing pipe.

A lower positioning ring 114 is formed at the lower part of the inner wall of the valve plate accommodating pipe; the upper end of the lower locating ring is provided with a lower locating rack 73.

The shaping of lower locating rack lower extreme has two parallel arrangement's lower location picture peg 731, down the baffle is installed between two lower location picture pegs for the lower locating rack can not take place to rotate.

A lower positioning sleeve is formed in the middle of the upper end of the lower positioning frame; and a valve plate positioning groove 63 which is rotationally connected with the lower positioning sleeve is formed in the center of the rotary valve plate.

A shell positioning groove 22 is formed in the center of the upper end of the base; a shell positioning shaft 152 which is rotatably inserted into the shell positioning groove is formed at the lower end of the air outlet sleeve; install bearing 10 between casing location axle outer wall and the casing constant head tank inner wall, the frictional force that produces when reducing between casing and the base rotates, the air current drive casing of being convenient for rotates.

The lower part of the shell positioning shaft extends into the base; the lower part of the shell positioning shaft is in threaded connection with a nut, so that the shell and the base are longitudinally fixed.

A lower positioning sleeve 15 is formed at the lower end of the outer wall of the gas outlet sleeve and positioned on the periphery of the positioning shaft of the shell; and a base upper convex ring 21 which is rotationally inserted with the lower positioning sleeve is formed at the upper end of the base.

A limiting groove 211 is formed at the upper end of the upper convex ring of the base; the included angle of the two ends of the limiting groove is less than or equal to 180 degrees; the inner wall of the lower locating sleeve is formed with a limiting convex strip 151 capable of moving in the limiting groove range.

Because the limiting convex strip only moves in the range of the limiting groove, the rotating range of the shell is further limited.

The upper part of the valve plate containing pipe is fixedly connected with an upper positioning frame 71; and a positioning sleeve 713 which is rotatably inserted with the driven fan blade is formed in the center of the lower end of the upper positioning frame.

A second wiring groove 711 for a wire of the motor to pass through is formed at the upper end of the upper positioning frame; the main frame cover lateral wall shaping has the first wiring groove 111 with the second wiring groove intercommunication.

A controller is arranged in the base; the motor is electrically connected with the controller; a through groove for a lead to pass through is formed on the shell positioning shaft; the wire of motor passes first wiring groove, second wiring groove, position sleeve, leads to the inslot and gets into the base for the motor is connected with the controller electricity.

Because the limiting groove limits the rotation range of the shell, the shell cannot rotate for multiple circles along one direction, and the lead is prevented from rotating together to cause damage to the lead.

The lower end of the base is fixedly connected with a chassis 20.

The housing is divided into a front housing 1a and a rear housing 1b (shown in fig. 6) in a mounting structure.

The base is provided with a power key, an acceleration button and a deceleration button; the power key, the acceleration button and the deceleration button are respectively and electrically connected with the controller.

Pressing down a power key, and controlling the motor to work by the controller; and pressing the power key again, and controlling the motor to stop working by the controller.

And when the accelerating button is pressed down, the controller controls the rotating speed of the motor to increase the set value.

And when the speed reduction button is pressed, the controller controls the rotating speed of the motor to reduce the set value.

The user presses down the power key, and the motor drives first fan blade and rotates, and outside air gets into the host computer cover through the back lid, and in each breather pipe gets into the air outlet sleeve to spout from the seam of giving vent to anger.

Alternatively, the rotary valve plate may be driven by a motor.

Example 2

As shown in fig. 11 to 15, the present embodiment is different from embodiment 1 in that: a gear part is connected between the driven fan blade and the rotary valve sheet in a transmission way; the gear portion includes a fourth reduction gear 82 in meshing driving connection with the driving gear, a third reduction gear 81 in meshing driving connection with the internal gear rotatably connected within the fourth reduction gear, and a coil spring 83 installed between the third reduction gear and the fourth reduction gear.

Two positioning magnets 732 are symmetrically and fixedly connected to the periphery of the upper end of the lower positioning frame; the lower end of the rotary valve plate is fixedly connected with an adsorption magnet 64 which can be tightly attracted with the positioning magnet.

The two positioning magnets are respectively a first positioning magnet and a second positioning magnet.

When the adsorption magnet and the first positioning magnet are just opposite to the attraction tightly, the effective air inlet area of the left ventilation cavity is larger than that of the right ventilation cavity.

When the adsorption magnet and the second positioning magnet are just opposite to the attraction tightly, the effective air inlet area of the right side ventilation cavity is larger than that of the left side ventilation cavity.

Assuming the initial stage, the attracting magnet and the first positioning magnet are opposite to each other and tightly attracted.

When the first fan blade works, the airflow generated by the first fan blade drives the driven fan blade to rotate, the driven fan blade drives the fourth speed reduction gear to rotate, and the torque of the torsion spring is increased.

When the torque of the torsion spring is smaller than the attraction force between the adsorption magnet and the first positioning magnet, the rotating valve plate cannot rotate, the pressure intensity in the left ventilation cavity is larger than the pressure intensity in the right ventilation cavity, and the shell rotates clockwise.

When the moment of torsion of torsional spring is greater than the suction between adsorption magnet and the first location magnet, adsorption magnet and first location magnet are thrown off for the rotation valve piece takes place to rotate, inhales tightly each other with the second location magnet until adsorption magnet, and the moment of torsion of torsional spring is less than the suction between adsorption magnet and the second location magnet this moment, and the rotation valve piece stops rotating.

Because the pressure in the right side vent cavity is higher than the pressure in the left side vent cavity at the moment, the shell rotates anticlockwise.

The driven fan blade continuously rotates, so that the torsion spring drives the rotating valve plate to intermittently rotate, the shell swings left and right, and the blowing area is increased.

Owing to set up the torsional spring for the rotation valve block carries out intermittent type nature and rotates, and the rotation that is not lasting, the effective air inlet area in each chamber of ventilating can keep invariable in the longer time, and the air velocity of each seam outflow of giving vent to anger can be invariable, and the dynamics of guarantee air-out makes the user not experience the change of air velocity, avoids because effective air inlet area changes constantly, leads to the air velocity of each seam outflow of giving vent to anger to change constantly.

Claims

1. A bladeless fan comprises a base and a shell which is rotatably connected to the base; the method is characterized in that:

the shell comprises an annular air outlet sleeve, a main machine sleeve positioned on the inner periphery of the air outlet sleeve, and a plurality of vent pipes for communicating the main machine sleeve and the air outlet sleeve;

a fan for supplying air to the direction of the vent pipe is arranged in the main frame sleeve;

the front end of the air outlet sleeve is provided with an air outlet seam;

the rear end of the main machine sleeve is provided with an air inlet;

the air outlet sleeve comprises two air vent cavities, and the main machine sleeve is communicated with each air vent cavity through more than one air vent pipe; the front end of the air outlet sleeve is provided with a left air outlet seam and a right air outlet seam which are respectively and correspondingly communicated with the two ventilation cavities;

the shell also comprises a valve plate containing pipe which is communicated with the main frame sleeve and the two ventilation cavities, and the valve plate containing pipe is internally provided with an air inlet which is respectively communicated with the two ventilation cavities;

2. A bladeless fan according to claim 1, wherein: an upper baffle plate is formed at the upper part of the air outlet sleeve, and a lower baffle plate is formed at the lower part of the air outlet sleeve; the upper baffle plate and the lower baffle plate divide the air outlet sleeve into two air vent cavities;

the lower partition plate is positioned at the lower end of the valve plate containing pipe and divides the lower port of the valve plate containing pipe into two air inlets;

3. A bladeless fan according to claim 2, wherein: the middle part of the inner wall of the valve plate accommodating pipe is fixedly connected with a gear positioning frame; a driving gear positioned at the upper end of the lower positioning ring is formed at the lower end of the driven fan blade;

the upper end of the gear positioning frame is rotatably connected with a first reduction gear in meshing transmission connection with the driving gear; the diameter of the driving gear is smaller than that of the first reduction gear; a second reducing gear which is coaxially arranged and is rotationally inserted with the gear positioning frame is formed at the lower end of the first reducing gear; the lower end of the second reduction gear extends to the lower part of the gear positioning frame;

4. A bladeless fan according to claim 2, wherein: a lower positioning ring is formed at the lower part of the inner wall of the valve plate containing pipe; the upper end of the lower positioning ring is provided with a lower positioning frame;

the rotating valve plate is rotatably connected to the upper end of the lower positioning frame;

5. A bladeless fan according to claim 1 or 2, wherein: a shell positioning groove is formed in the center of the upper end of the base; a shell positioning shaft which is rotationally inserted with the shell positioning groove is formed at the lower end of the air outlet sleeve; a bearing is arranged between the outer wall of the shell positioning shaft and the inner wall of the shell positioning groove;

the lower end of the outer wall of the gas outlet sleeve is positioned on the periphery of the positioning shaft of the shell and is provided with a lower positioning sleeve; an upper convex ring of the base is formed at the upper end of the base and is rotationally inserted with the lower positioning sleeve;

6. A bladeless fan according to claim 2, wherein: the upper part of the valve plate containing pipe is fixedly connected with an upper positioning frame; a positioning sleeve which is rotatably inserted with the driven fan blade is formed in the center of the lower end of the upper positioning frame;

7. A bladeless fan comprises a base and a shell which is rotatably connected to the base; the method is characterized in that:

the front end of the air outlet sleeve is provided with an air outlet seam;

the rear end of the main machine sleeve is provided with an air inlet;

when the left air outlet seam and the right air outlet seam blow out air flows with different speeds, the shell can rotate relative to the base.