Desktop bladeless fan

Abstract

The utility model discloses a desktop bladeless fan which comprises an annular main frame, an inner shell connected to the inner side of the main frame and an outer shell connected to the outer side of the main frame, an interval is formed between the main frame and the outer shell on the front side to form an air outlet, and the main frame comprises a left frame body, a right frame body and a lower frame body provided with a fan assembly. The inner shell is provided with an air inlet corresponding to the fan assembly, a first elastic piece is arranged between the lower frame body and the left frame body, a second elastic piece is arranged between the lower frame body and the right frame body, a gap is formed between the left frame body and the inner side wall of the outer shell to form a left air channel, and a second air channel is formed between the right frame body and the inner side wall of the outer shell. A gap is formed between the right frame body and the inner side wall of the shell to form a right air duct, and the left air duct and the right air duct are both communicated with the air inlet, the fan assembly and the air outlet; by the adoption of the structure, vibration of the bladeless fan can be reduced to the maximum extent, meanwhile, the sealing effect can be achieved, and it is avoided that part of blown air leaks through gaps.

Description

Technical Field

[0001] The utility model relates to the technical field of bladeless fans, in particular to a desktop bladeless fan. Background Art

[0002] A bladeless fan is also called an air multiplier. It can produce natural and continuous cool breeze. Because it has no blades, it will not be covered with dust or hurt children's fingers. The bladeless fan inhales air through the air suction holes at the bottom and sprays the air in a circular trajectory. Compared with traditional fans, bladeless fans have the characteristics of good performance, low energy consumption and comfortable blowing. However, since the fan will generate greater vibration during operation, if the vibration is not handled, the bladeless fan will generate greater noise, thus affecting the user experience.

[0003] Patent document with publication number CN202280666U discloses a bladeless fan, which reduces the vibration of the fan by arranging silicone on the shock-absorbing base. However, the patent only achieves shock absorption through the shock-absorbing base. During use, the casing will continue to vibrate and make noise, causing discomfort. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a desktop bladeless fan, in which a fan assembly is arranged in a lower frame, and elastic parts are provided at the connection between the lower frame and the left frame and the right frame.

[0005] The utility model adopts a technical solution to solve its technical problems, which is to provide a desktop bladeless fan, comprising a ring-shaped main frame, an inner shell connected to the inner side of the main frame and an outer shell connected to the outer side of the main frame, the main frame and the outer shell having a gap on the front side to form an air outlet, the main frame comprising a left frame, a right frame and a lower frame provided with a fan assembly, the inner shell having an air inlet corresponding to the fan assembly, a first elastic member being provided between the lower frame and the left frame, a second elastic member being provided between the lower frame and the right frame, a gap being provided between the left frame and the inner side wall of the outer shell to form a left air duct, a gap being provided between the right frame and the inner side wall of the outer shell to form a right air duct, and the left air duct and the right air duct are both connected with the air inlet, the fan assembly and the air outlet.

[0006] As a further improvement of the present invention, the front and rear sides of the lower frame are both provided with a third elastic member for abutting against the inner shell.

[0007] As a further improvement of the utility model, the outer shell is fixed with a baffle located in front of the lower frame, the inner shell is also connected to the baffle, and the baffle is provided with an air supply groove.

[0008] As a further improvement of the present invention, the fan assembly includes a left turbine fan and a right turbine fan which are respectively arranged on the left and right sides of the lower frame and are not connected to each other, the left air duct is connected to the left turbine fan, and the right air duct is connected to the right turbine fan.

[0009] As a further improvement of the present invention, the left side wall of the left frame and the right side wall of the right frame are both provided with arc-shaped inclined surfaces so as to reduce the cross-sectional area of ​​the airflow flowing through the left air duct and the right air duct.

[0010] As a further improvement of the present invention, a base assembly is connected to the bottom of the shell, and an oscillating drive device connected to the shell is provided on the base assembly so that the oscillating drive device drives the shell to reciprocate.

[0011] As a further improvement of the present invention, the base assembly includes a base member and a rubber pad connected under the base member, the base member is provided with a charging interface to which a charging cable can be plugged, and the shell is provided with an avoidance through hole corresponding to the charging interface.

[0012] As a further improvement of the present invention, the base assembly is provided with a limiting groove, and the bottom of the shell is provided with a matching column inserted into the limiting groove.

[0013] As a further improvement of the present invention, a connecting seat is provided between the left frame and the right frame, the inner shell is provided with a humidifier through hole through which the connecting seat can leak out, and the connecting seat is connected to a humidifier.

[0014] As a further improvement of the present invention, the connecting base is connected to the humidifier via a magnetic attraction structure.

[0015] The beneficial effects of the utility model are at least:

[0016] 1. An elastic member is provided between the lower frame and the left frame, and between the lower frame and the right frame, which can reduce the vibration of the bladeless fan to the maximum extent, and can also play a sealing role to prevent the blown wind from partially leaking through the gap.

[0017] 2. The setting of the air supply groove allows part of the wind to enter from the front side of the bladeless fan; the setting of the arc-shaped slope makes the airflow cross-sectional area smaller as the airflow approaches the air outlet, which can further increase the airflow velocity and achieve a larger amount of air actually blown out than inhaled through the effect of viscosity.

[0018] 3. The avoidance through hole can prevent the charging cable from swinging or even getting tangled. Through the setting of this structure, the charging cable can be kept still relative to the ground, and the bladeless fan can be used normally while charging.

[0019] 4. The humidifier sprays steam toward the front, and part of the airflow will move a distance toward the middle of the bladeless fan. At this time, it can move to the front with the steam to achieve uniform air output and humidification effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a structural explosion diagram of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the utility model after some structures are omitted;

[0023] Figure 4 It is an exploded view of the structure of the utility model after some structures are omitted;

[0024] Figure 5 It is an exploded view of the structure of the utility model with some structures omitted. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0026] Reference Figure 1-4 The utility model proposes a desktop bladeless fan, characterized in that it comprises a ring-shaped main frame 1, an inner shell 2 connected to the inner side of the main frame 1 and an outer shell 3 connected to the outer side of the main frame 1, the main frame 1 and the outer shell 3 are spaced at the front side to form an air outlet 11, the main frame 1 comprises a left frame 12, a right frame 13 and a lower frame 14 provided with a fan assembly 4, the inner shell 2 is provided with an air inlet 5 corresponding to the fan assembly 4, a first elastic member 141 is provided between the lower frame 14 and the left frame 12, a second elastic member 142 is provided between the lower frame 14 and the right frame 13, a space is provided between the left frame 12 and the inner side wall of the outer shell 3 to form a left air duct 121, a space is provided between the right frame 13 and the inner side wall of the outer shell 3 to form a right air duct 131, and the left air duct 121 and the right air duct 131 are both connected with the air inlet 5, the fan assembly 4 and the air outlet 11.

[0027] Since the fan assembly 4 is arranged in the lower frame 14, and the lower frame 14 is connected to the left frame 12 and the right frame 13, elastic parts are arranged between the lower frame 14 and the left frame 12, and between the lower frame 14 and the right frame 13 to minimize the vibration of the bladeless fan.

[0028] Reference Figure 4It can be known that, as a preferred embodiment of the utility model, the first elastic member 141 and the second elastic member 142 are made of rubber material and are in a rectangular shape to surround the upper opening of the lower frame. The first elastic member 141 and the second elastic member 142 can not only play a shock-absorbing role, but also seal the interface of the connection to maximize the use of wind flow and avoid partial leakage of the blown wind through the gaps.

[0029] Reference Figure 4 It can be seen that the front and rear sides of the lower frame 14 are both provided with a third elastic member 143 for abutting the inner shell 2; in order to ensure the portability of the bladeless fan, the volume is usually maximized and the equipment is made as small as possible, so the gaps between the various components will not be very large, and since the inner shell 2 is connected to the inner side of the main frame 1, during actual use, the lower frame 14 will inevitably touch the inner shell 2 and transmit the vibration to the inner shell 2. Therefore, the third elastic member 143 is provided on the front and rear sides of the lower frame 14 to reduce the vibration of the inner shell 2 caused by the fan assembly 4, and can reduce the vibration of the lower frame 14 itself.

[0030] Reference Figure 2-Figure 4 It can be seen that the outer shell 3 is fixed with a baffle 31 located in front of the lower frame 14, and the inner shell 2 is also connected to the baffle 31, and the baffle 31 is provided with an air supply groove 311; through the setting of the baffle 31, the lower part of the inner shell 2 can be fixedly connected to the outer shell 3, thereby improving the stability of the connection.

[0031] Since the fan assembly 4 is arranged in the lower frame 14 and the air enters from the air inlet 5, sometimes the bladeless fan is placed on the desktop, and the air inlet 5 may be blocked by objects, resulting in insufficient air intake. Therefore, the provision of the air supply groove 311 allows part of the air to enter from the front side of the bladeless fan. It should be noted that, referring to Figure 4 It can be seen that the air supply grooves 311 are arranged at intervals, which can prevent debris from entering the fan assembly 4 through the air supply grooves 311 to cause damage, and also prevent accidents caused by fingers being inserted.

[0032] The fan assembly 4 includes a left turbine fan 41 and a right turbine fan 42, which are respectively arranged on the left and right sides of the lower frame 14 and are not connected to each other. The left air duct 121 is connected to the left turbine fan 41, and the right air duct 131 is connected to the right turbine fan 42; the left turbine fan 41 and the right turbine fan 42 of the lower frame 14 are respectively connected to the left air duct and the right air duct, and the left and right air ducts are both connected to the air outlet of the bladeless fan. The air outlets of the left and right turbine fans do not interfere with each other. When the speeds of the two motors are synchronized, they can provide almost equal air volume for the left and right air ducts, and can maintain the airflow at the air outlet uniform and stable, further reducing the noise of the bladeless fan when working.

[0033] The left side wall of the left frame 12 and the right side wall of the right frame 13 are both provided with an arc-shaped inclined surface 122 to reduce the cross-sectional area of ​​the air flow flowing through the left air duct 121 and the right air duct 131; Figure 4 It can be seen that the arrangement of the arc-shaped inclined surface 122 makes the airflow cross-sectional area smaller as it approaches the air outlet 11, which can further increase the airflow velocity and increase the airflow velocity blown out of the air outlet 11. Then, the air near the air outlet 11 of the bladeless fan is driven forward by the viscosity, so that the actual amount of air blown out is greater than the amount of air inhaled. The specific principle is that when the air is blown into the left or right air duct by the fan assembly, due to the effect of resistance, there is a speed difference between the air and the cavity wall, and the air speed close to the cavity wall will be lower than that away from the cavity wall. The air speed on the wall forms a velocity gradient, and according to Newton's law of viscosity, the speed difference between two adjacent layers of air will cause energy to be transferred from the faster layer to the slower layer, thereby causing the entire air column to accelerate as a whole, and the air close to the arc-shaped slope 122 is constantly affected by the viscosity, which will cause the air to continue to accelerate when passing through the left or right air duct, and finally when the air is blown out of the air outlet 11, it will drive the nearby static air to move together, and finally cause the amount of air blown out to be greater than the amount of air inhaled.

[0034] Reference Figure 5 It can be seen that the bottom of the shell 3 is connected to a base assembly 32, and the base assembly 32 is provided with an oscillating drive device 6 connected to the shell 3 so that the oscillating drive device 6 drives the shell 3 to rotate back and forth, thereby achieving the effect of blowing air back and forth.

[0035] Reference Figure 5 It can be seen that the base assembly 32 includes a base member 321 and a rubber pad 322 connected under the base member 321, the base member 321 is provided with a charging interface 3211 for plugging a charging cable, and the shell 3 is provided with an avoidance hole 33 corresponding to the charging interface 3211; since the shaking drive device 6 will drive the upper part of the bladeless fan to rotate back and forth, the avoidance hole 33 is provided to prevent the charging cable from swinging or even getting tangled. It should be noted that through the setting of this structure, the charging cable can be made stationary relative to the ground, and the bladeless fan can be used normally while charging.

[0036] Reference Figure 5 It can be seen that the base assembly 32 is provided with a limiting groove 3212, and the bottom of the shell 3 is provided with a matching column 34 inserted into the limiting groove 3212. The limiting groove 3212 can provide a limiting function to prevent the charging cable from being stuck and damaged due to excessive swinging amplitude caused by a malfunction of the shaking head drive device 6.

[0037] A connecting seat 15 is arranged between the left frame 12 and the right frame 13, and the inner shell 2 is provided with a humidifier through hole 21 through which the connecting seat 15 can leak out, and a humidifier 16 is connected to the connecting seat 15; the setting of the humidifier 16 can increase the humidity of the air and protect the human skin, especially in dry weather. It should be noted that because the inner shell 2 is arranged on the inner side of the main frame 1, the humidifier 16 is also located on the inner side of the main frame 1. Due to the jet effect in fluid mechanics, that is, when the airflow is ejected through the air outlet 11, it will tend to flow toward the curved surface. That is to say, when the humidifier 16 is working, the humidifier 16 ejects steam toward the front side, and part of the airflow will move a distance toward the middle of the bladeless fan, and at this time it can move to the front side with the steam to achieve the effect of uniform air outlet and humidification.

[0038] The connecting seat 15 is connected to the humidifier 16 via a magnetic structure; the magnetic structure facilitates assembly, and the humidifier 16 can be normally used by reversing the assembly direction.

Claims

1. A desktop bladeless fan, characterized in that: The invention comprises a main frame (1) in an annular shape, an inner shell (2) connected to the inner side of the main frame (1), and an outer shell (3) connected to the outer side of the main frame (1); the main frame (1) and the outer shell (3) are spaced apart at the front side to form an air outlet (11); the main frame (1) comprises a left frame body (12), a right frame body (13), and a lower frame body (14) provided with a fan assembly (4); the inner shell (2) is provided with an air inlet (5) corresponding to the fan assembly (4); the lower frame body (14) and the left frame body are spaced apart from each other to form an air outlet (11); A first elastic member (141) is provided between the upper and lower frames (12), a second elastic member (142) is provided between the lower frame (14) and the right frame (13), a gap is provided between the left frame (12) and the inner side wall of the outer shell (3) to form a left air duct (121), and a gap is provided between the right frame (13) and the inner side wall of the outer shell (3) to form a right air duct (131), and both the left air duct (121) and the right air duct (131) are connected to the air inlet (5), the fan assembly (4) and the air outlet (11).

2. A desktop bladeless fan according to claim 1, characterized in that: The front and rear sides of the lower frame (14) are both provided with a third elastic member (143) for abutting against the inner shell (2).

3. A desktop bladeless fan according to claim 1, characterized in that: The outer shell (3) is fixed with a baffle (31) located in front of the lower frame (14); the inner shell (2) is also connected to the baffle (31); and the baffle (31) is provided with an air supply groove (311).

4. A desktop bladeless fan according to claim 1, characterized in that: The fan assembly (4) comprises a left turbine fan (41) and a right turbine fan (42) which are respectively arranged on the left and right sides of the lower frame (14) and are not connected to each other; the left air duct (121) is connected to the left turbine fan (41), and the right air duct (131) is connected to the right turbine fan (42).

5. The desktop bladeless fan according to claim 1, characterized in that: The left side wall of the left frame (12) and the right side wall of the right frame (13) are both provided with arc-shaped inclined surfaces (122) so as to reduce the cross-sectional area of ​​the airflow flowing through the left air duct (121) and the right air duct (131).

6. The desktop bladeless fan according to claim 1, characterized in that: The bottom of the shell (3) is connected to a base assembly (32), and the base assembly (32) is provided with an oscillating drive device (6) connected to the shell (3) so that the oscillating drive device (6) drives the shell (3) to reciprocate.

7. A desktop bladeless fan according to claim 6, characterized in that: The base assembly (32) comprises a base member (321) and a rubber pad (322) connected under the base member (321); the base member (321) is provided with a charging interface (3211) that can be plugged into a charging cable; and the housing (3) is provided with an avoidance through hole (33) corresponding to the charging interface (3211).

8. The desktop bladeless fan according to claim 6, characterized in that: The base assembly (32) is provided with a limiting groove (3212), and the bottom of the housing (3) is provided with a matching column (34) inserted into the limiting groove (3212).

9. The desktop bladeless fan according to claim 1, characterized in that: A connecting seat (15) is provided between the left frame (12) and the right frame (13), the inner shell (2) is provided with a humidifier through hole (21) through which the connecting seat (15) can leak out, and a humidifier (16) is connected to the connecting seat (15).

10. A desktop bladeless fan according to claim 9, characterized in that: The connecting seat (15) is connected to the humidifier (16) via a magnetic attraction structure.

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