A bladeless fan

Abstract

The present invention relates to a bladeless fan. Through the arrangement of a straight duct, a curved duct, a diverter pipe, a left nozzle assembly and a right nozzle assembly, when the bladeless fan is working, air can be blown out from the left nozzle assembly and the right nozzle assembly on both sides. At the same time, the straight duct can rotate relative to the base, and the diverter pipe can rotate 360° relative to the curved duct, so that the blowing range of the left nozzle assembly and the right nozzle assembly can be adjusted. It can be seen that the bladeless fan of this design can adjust the rotation angle position of the left nozzle assembly and the right nozzle assembly according to needs, effectively expanding the air outlet range of the bladeless fan and meeting the user's usage requirements; in addition, through the arrangement of the silencer cover, it can be ensured that when air enters to form an airflow, the noise generated by the fan motor assembly is blocked and reflected through the silencer channel when it propagates outward, thereby playing a role of noise reduction and silencing, thereby reducing the noise of the bladeless fan when it is working and improving the user experience.

Description

Technical Field

[0001] The invention relates to a bladeless fan. Background Art

[0002] Bladeless fans, also known as air multipliers, create a natural, continuous breeze by forcing air out through the exhaust vents of the duct, thereby increasing air flow. They are popular with consumers due to their safety, cleanliness, and aesthetics.

[0003] However, the bladeless fans currently on the market still have the following shortcomings: 1. The blowing angle of bladeless fans is mostly fixed, and the blowing range is limited, which cannot meet the usage requirements; 2. During the operation of the bladeless fan, the fan motor power system inhales air through the air inlet and establishes airflow; however, the noise generated by the fan motor power system when working can spread outward through the air inlet, resulting in a louder noise for the bladeless fan, affecting the user experience. Summary of the Invention

[0004] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention proposes a bladeless fan with adjustable angle, wide blowing range and low noise.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The fan is connected with the air inlet of the fan motor and the air inlet of the fan is connected with the air inlet of the fan motor.

[0007] In some embodiments, a diversion baffle is provided between the second pipe opening and the third pipe opening, and the diversion baffle guides the airflow entering the first pipe opening to be diverted to the second pipe opening and the third pipe opening respectively.

[0008] In some embodiments, a fixing seat is fixed to the outer side of the rear end of the air duct bend, a cylinder is arranged outside the fixing seat, and a rotating shaft is fixed on the diversion baffle. The rotating shaft is coaxially arranged with the first pipe mouth, and the other end passes through the air duct bend and the cylinder in sequence and is connected to a rotating disk. An annular plate is arranged between the fixing seat and the rotating disk, and the annular plate is movably sleeved outside the cylinder. Several springs are arranged between the fixing seat and the annular plate, and several positioning protrusions are evenly distributed along the circumference on the side of the annular plate close to the rotating disk, and several positioning grooves that cooperate with the positioning protrusions are arranged on one side of the rotating disk.

[0009] In some embodiments, a guide plate is provided on the outer wall of the cylinder, and a guide groove is provided on the inner wall of the circular ring plate. The guide groove is slidably provided on the guide plate. A plurality of spring fixing holes corresponding to the springs are provided on the outer side of the fixing seat, and a plurality of spring positioning protrusions corresponding to the springs are provided on the inner side of the circular ring plate. One end of the spring is provided in the spring fixing hole, and the other end is sleeved on the spring positioning protrusion.

[0010] In some embodiments, the left nozzle assembly and the right nozzle assembly are both provided with an internal channel for receiving airflow and an exhaust port for discharging the airflow outward, and a number of guide arc blades for guiding the airflow to the exhaust port are arranged at intervals along the length direction of the internal channels of the left nozzle assembly and the right nozzle assembly.

[0011] In some embodiments, when the guide arc blades are arranged in an internal channel from the inside to the outside, the spacing between them increases successively.

[0012] In some embodiments, the silencer cover is a barrel-shaped structure with an open upper end, which includes a circular bottom plate, an outer annular side wall and an inner annular side wall arranged on the circular bottom plate, the outer air inlet is arranged on the outer annular side wall, the inner air inlet is arranged on the inner annular side wall, and the silencer channel is arranged between the outer annular side wall and the inner annular side wall.

[0013] In some embodiments, the straight line segment between the center of the circular bottom plate and the outer air inlet is the first reference line, and the straight line segment between the center of the circular bottom plate and the inner air inlet is the second reference line. An angle A is formed between the first reference line and the second reference line, and the angle A is 25-35°.

[0014] In some embodiments, the muffler channel is an arc-shaped structure or an S-shaped structure.

[0015] In some embodiments, a silicone sealing gasket is provided between the noise reduction cover and the fan motor assembly.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the arrangement of the air duct straight pipe, the air duct bend, the diverter pipe, the left nozzle assembly and the right nozzle assembly, when the bladeless fan is working, the air flow can be blown out from the left nozzle assembly and the right nozzle assembly on both sides. At the same time, the air duct straight pipe can rotate relative to the base, and the diverter pipe can rotate 360 ​​degrees relative to the air duct bend, so that the blowing range of the left nozzle assembly and the right nozzle assembly can be adjusted. It can be seen that the bladeless fan of this design can adjust the rotation angle position of the left nozzle assembly and the right nozzle assembly according to demand, effectively expanding the air outlet range of the bladeless fan and meeting the user's usage requirements;

[0018] 2. In addition, the setting of the silencer cover can ensure that when air enters to form an airflow, the noise generated by the fan motor assembly is blocked and reflected through the silencer channel when it propagates outward, thereby reducing noise and silencing the noise, thereby reducing the noise of the bladeless fan when it is working and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the three-dimensional schematic diagrams of the bladeless fan of the present invention;

[0020] Figure 2 This is the second perspective schematic diagram of the bladeless fan of the present invention;

[0021] Figure 3 Schematic top view of the bladeless fan of the present invention;

[0022] Figure 4 For the present invention Figure 3 AA cross-sectional view;

[0023] Figure 5 It is a schematic structural perspective diagram of the diverter pipe of the present invention;

[0024] Figure 6 This is a schematic structural diagram of the diverter pipe and the air duct elbow of the present invention;

[0025] Figure 7 For the present invention Figure 6 A magnified schematic diagram of point A;

[0026] Figure 8 It is a partial exploded schematic diagram of the present invention;

[0027] Figure 9 is a three-dimensional schematic diagram of the base of the present invention;

[0028] Figure 10 is a schematic cross-sectional view of the base of the present invention;

[0029] Figure 11 It is a cross-sectional schematic diagram of the fan motor assembly and the silencer cover after installation of the present invention;

[0030] Figure 12 It is a three-dimensional schematic diagram of the sound-absorbing cover of the present invention;

[0031] Figure 13 This is a schematic diagram of the main view of the sound-absorbing cover of the present invention;

[0032] Figure 14 For the present invention Figure 13 Schematic diagram of the cross-section at BB. DETAILED DESCRIPTION

[0033] The following detailed description provides various embodiments or examples for implementing the present invention. Of course, these are merely examples or embodiments and are not intended to be limiting. Furthermore, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. Such repetition is for simplicity and clarity in describing the present invention and does not imply a specific relationship between the different embodiments and / or configurations discussed.

[0034] like Figures 1-11 The bladeless fan shown includes a base 11, a fan motor assembly 12 arranged in the base 11, an air inlet 13 arranged on one side of the base 11, and an air flow outlet 14 arranged at the upper end of the base 11. A straight duct 1 connected to the air flow outlet 14 is rotatably installed at the upper end of the base 11, and the other end of the straight duct 1 is connected to an air duct bend 2, and one end of the air duct bend 2 is connected to a diversion pipe 3, and the diversion pipe 3 includes a first pipe opening 4, a second pipe opening 5 and a third pipe opening 6. The first pipe opening 4 is rotatably connected to one end of the air duct bend 2, the second pipe opening 5 is connected to a left nozzle assembly 7, and the third pipe opening 6 is connected to a right nozzle assembly 8.

[0035] According to the above structure, through the arrangement of the air duct straight pipe 1, the air duct bend 2, the diverter pipe 3, the left nozzle assembly 7 and the right nozzle assembly 8, when the bladeless fan is working, the air flow can be blown out from the left nozzle assembly 7 and the right nozzle assembly 8 on both sides. At the same time, the air duct straight pipe 1 can rotate relative to the base 11, and the diverter pipe 3 can rotate 360° relative to the air duct bend 2, so that the blowing range of the left nozzle assembly 7 and the right nozzle assembly 8 can be adjusted. It can be seen that the bladeless fan of this design can adjust the rotation angle position of the left nozzle assembly 7 and the right nozzle assembly 8 according to demand, effectively expanding the air outlet range of the bladeless fan to meet the user's usage requirements.

[0036] See also Figure 4-Figure 6 As shown, a diverter baffle 21 is provided between the second pipe opening 5 and the third pipe opening 6. The diverter baffle 21 guides the airflow entering the first pipe opening 4 to be diverted to the second pipe opening 5 and the third pipe opening 6 respectively. Of course, the inner ends of both sides of the diverter baffle 21 are arc-shaped structures, which can facilitate the airflow to flow smoothly into the left nozzle assembly 7 and the right nozzle assembly 8.

[0037] The diverter pipe 3 is formed by two symmetrical shell covers. When installed, the two shell covers are combined and rotated to be sleeved on one end of the air duct bend 2. The structure is simple and the installation is convenient and quick.

[0038] See also Figure 4-Figure 8 As shown, a fixing seat 41 is fixed to the outer side of the rear end of the air duct bend 2, a cylinder 42 is arranged outside the fixing seat 41, and a rotating shaft 31 is fixed on the diversion partition 21. The rotating shaft 31 is coaxially arranged with the first pipe mouth 4, and the other end passes through the air duct bend 2 and the cylinder 42 in sequence and is connected to a rotating disk 43. An annular piece 44 is provided between the fixing seat 41 and the rotating disk 43, and the annular piece 44 is movably sleeved outside the cylinder 42. A number of springs 45 are provided between the fixing seat 41 and the annular piece 44, and a number of positioning protrusions 46 are evenly distributed along the circumference on the side of the annular piece 44 close to the rotating disk 43, and a number of positioning grooves 47 cooperating with the positioning protrusions 46 are provided on one side of the rotating disk 43.

[0039] First, by setting the rotating shaft 31, the strength of the diverter pipe 3 after installation and the stability during rotation can be improved; in addition, according to the above structure, under the action of the spring 45, the positioning protrusion 46 is kept against the positioning groove 47, thereby realizing the positioning of the rotating disk 43, thereby realizing the positioning of the rotating shaft 31 and the diverter pipe 3, and improving the stability of the bladeless fan during operation.

[0040] Furthermore, a guide piece 51 is provided on the outer wall of the cylinder 42, and a guide slot 52 is provided on the inner wall of the annular piece 44. The guide slot 52 is slidably provided on the guide piece 51, so that the annular piece 44 can only move along the axial direction of the cylinder 42, and is used to compress the spring 45. Under the elastic force of the spring 45, the annular piece 44 is kept against one side of the rotating disk 43.

[0041] A plurality of spring fixing holes 61 corresponding to the spring 45 are provided on the outer side of the fixing seat 41, and a plurality of spring positioning protrusions 62 corresponding to the spring 45 are provided on the inner side of the annular piece 44. One end of the spring 45 is provided in the spring fixing hole 61, and the other end is sleeved on the spring positioning protrusion 62, so that the spring 45 can be stably fixed and installed, thereby improving the stability of the rotating disk 43 during rotation.

[0042] There are four corresponding groups of positioning protrusions 46 and positioning grooves 47, that is, the left nozzle assembly 7 and the right nozzle assembly 8 can maintain a horizontal state for blowing (such as Figure 1 ), or keep it upright and blow air (as shown Figure 2 shown).

[0043] Of course, the horizontal blowing or vertical blowing of the above-mentioned left nozzle assembly 7 and right nozzle assembly 8 is a better solution for this application. As long as it achieves the technical effect of the present invention by any same or similar means, it should fall within the protection scope of the present invention.

[0044] See also Figure 2 、 Figure 4 As shown, the left nozzle assembly 7 and the right nozzle assembly 8 are both provided with an internal channel 71 for receiving airflow and an exhaust port 72 for discharging the airflow outward, and a plurality of guide arc blades 81 for guiding the airflow to the exhaust port 72 are arranged at intervals along the length direction in the internal channels 71 of the left nozzle assembly 7 and the right nozzle assembly 8; the airflow enters the internal channels 71 of the left nozzle assembly 7 and the right nozzle assembly 8 respectively from the diversion pipe 3, and then, through the setting of the guide arc blades 81, the airflow can be blown out from the exhaust port 72 more evenly.

[0045] Furthermore, when the guide arc blades 81 are arranged from the inside to the outside in the internal channel 71, the spacing between them increases successively. That is, the spacing between the guide arc blades 81 close to the diverter pipe 3 is smaller, while the spacing between the guide arc blades 81 away from the diverter pipe 3 is larger, thereby effectively expanding the air outlet range of the bladeless fan.

[0046] See also Figure 2 、 Figure 4 、 Figure 10-14 As shown, a silencer cover 9 is covered at the air inlet of the fan motor assembly 12, and a silencer structure is provided on the side wall of the silencer cover 9. The silencer structure includes an outer air inlet 91 provided on the outer wall of the silencer cover 9, an inner air inlet 92 provided on the inner wall of the silencer cover 9, and a silencer channel 93 connecting the outer air inlet 91 with the inner air inlet 92.

[0047] Thus, air can enter the fan motor assembly 12 from the outer air inlet 91, the inner air inlet 92 and the silencer channel 93 to form an airflow. At the same time, the noise generated by the fan motor assembly 12 is blocked and reflected by the silencer channel 93 when it propagates outward, thereby reducing noise and silencing the air, thereby reducing the noise of the bladeless fan when it is working and improving the user experience.

[0048] See also Figure 12-14 As shown, the silencer cover 9 is a barrel-shaped structure with an open upper end, which includes a circular bottom plate 94, an outer annular side wall 95 and an inner annular side wall 96 arranged on the circular bottom plate 94, the outer air inlet 91 is arranged on the outer annular side wall 95, the inner air inlet 92 is arranged on the inner annular side wall 96, and the silencer channel 93 is arranged between the outer annular side wall 95 and the inner annular side wall 96.

[0049] See also Figure 14As shown, the outer air inlet 91 and the inner air inlet 92 are not on the same meridian, so the silencer channel 93 is not directly connected in a straight line.

[0050] Preferably, the silencer channel 93 is an arc-shaped structure or an S-shaped structure, so that the inner wall of the silencer channel 93 is relatively arc-shaped and smooth, which can facilitate the fan motor assembly 12 to quickly inhale wind and enhance the airflow rate. At the same time, the noise generated by the fan motor assembly 12 can be reflected multiple times in the silencer channel 93 until it is eliminated, thereby achieving a better silent effect.

[0051] The arc-shaped or S-shaped structure of the silencer channel 93 of the present application is a preferred solution. Of course, it can also be any shape structure. As long as it achieves the technical effect of the present invention by any same or similar means, it should fall within the scope of protection of the present invention.

[0052] See also Figure 14 As shown, the straight line segment between the center of the circular bottom plate 94 and the outer air inlet 91 is the first reference line 111, and the straight line segment between the center of the circular bottom plate 94 and the inner air inlet 92 is the second reference line 222. An angle A is formed between the first reference line 111 and the second reference line 222, and the angle A is 25-35°, preferably 30°; thereby, a certain distance can be created between the outer air inlet 91 and the inner air inlet 92, thereby extending the length of the silencer channel 93 to obtain a better silencing effect.

[0053] The outer air inlet 91 , the inner air inlet 92 and the silencer channel 93 are evenly distributed along the circumference in multiple groups, and the present application is designed with twenty groups, the number of which can be selected and designed according to the size and strength of the silencer cover 9 .

[0054] Furthermore, the outer air inlet 91 and the inner air inlet 92 are both long opening structures extending vertically, wherein the length and width of the outer air inlet 91 and the inner air inlet 92 are 80 mm*7 mm.

[0055] In order to enhance the overall strength of the silencer cover 9, a connecting reinforcement plate 20 is provided in the silencer channel 93. The connecting reinforcement plate 20 is preferably provided in the middle position of the silencer channel 93. The silencer channel 93 can be divided into two parts, the upper and lower parts, by the connecting reinforcement plate 20, and the injection molding production of the injection mold can be facilitated.

[0056] Of course, the above-mentioned number and size of air inlets are the preferred solutions of this application. As long as the technical effects of the present invention are achieved by any identical or similar means, they should fall within the scope of protection of the present invention.

[0057] See also Figure 11As shown, the fan motor assembly 12 includes an air guide cover 101, an impeller 102, a motor 103 and a motor bracket 104. Of course, the fan motor assembly 12 is of conventional design and will not be described in detail here.

[0058] A silicone sealing gasket 100 is provided between the silencer cover 9 and the fan motor assembly 12. Specifically, the silicone sealing gasket 100 can be installed between the motor bracket 104 and the silencer cover 9 to improve the sealing performance of the silencer cover 9 after installation, thereby effectively improving the silencing effect.

[0059] The following table shows the test results when the silencer cover is installed and when the silencer cover is not installed:

[0060]

[0061] It can be seen from the above table that in the bladeless fan equipped with the silencer cover 9, the air volume and wind speed are basically the same as those of the bladeless fan without the silencer cover 9. However, the noise value of the bladeless fan equipped with the silencer cover 9 is 7.2dB lower than the noise value of the bladeless fan without the silencer cover 9. That is to say, the installation of the silencer cover 9 will not affect the air volume and wind speed of the bladeless fan too much, but it can effectively reduce the noise.

[0062] The basic principles, main features, and advantages of the present invention are shown and described above in conjunction with the accompanying drawings. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention as claimed. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A bladeless fan comprising a base (11), a fan motor assembly (12) disposed in the base (11), an air inlet (13) disposed on one side of the base (11), and an air flow outlet (14) disposed on the upper end of the base (11), characterized in that: An air duct straight pipe (1) connected to the air flow outlet (14) is rotatably mounted on the upper end of the base (11); the other end of the air duct straight pipe (1) is connected to the air duct bend (2); one end of the air duct bend (2) is connected to a diversion pipe (3); the diversion pipe (3) includes a first pipe opening (4), a second pipe opening (5) and a third pipe opening (6); the first pipe opening (4) is rotatably connected to one end of the air duct bend (2); the second pipe opening (5) is connected to a left nozzle assembly (7); the third pipe opening (6) is connected to a right nozzle assembly (8); The air inlet of the fan motor assembly (12) is covered with a silencer cover (9), and the side wall of the silencer cover (9) is provided with a silencer structure, and the outer wall of the silencer cover (9) is an outer annular side wall (95), and the inner wall is an inner annular side wall (96), and the silencer structure includes an outer air inlet (91) provided on the outer annular side wall (95) of the silencer cover (9), an inner air inlet (92) provided on the inner annular side wall (96) of the silencer cover (9), and a silencer channel (93) connecting the outer air inlet (91) and the inner air inlet (92).

2. The bladeless fan according to claim 1, characterized in that: A diversion baffle (21) is provided between the second pipe opening (5) and the third pipe opening (6), and the diversion baffle (21) guides the airflow entering the first pipe opening (4) to the second pipe opening (5) and the third pipe opening (6).

3. The bladeless fan according to claim 2, characterized in that: A fixing seat (41) is fixed on the outside of the rear end of the air duct bend (2), a cylinder (42) is arranged outside the fixing seat (41), a rotating shaft (31) is fixed on the diversion partition (21), the rotating shaft (31) is coaxially arranged with the first pipe opening (4), and the other end of the rotating shaft (31) is connected to the rotating disk (43) after passing through the air duct bend (2) and the cylinder (42) in sequence, and a circular ring piece (44) is arranged between the fixing seat (41) and the rotating disk (43), the circular ring piece (44) is movably sleeved outside the cylinder (42), and a plurality of springs (45) are arranged between the fixing seat (41) and the circular ring piece (44), a plurality of positioning protrusions (46) are evenly distributed along the circumference on one side of the circular ring piece (44) close to the rotating disk (43), and a plurality of positioning grooves (47) cooperating with the positioning protrusions (46) are arranged on one side of the rotating disk (43).

4. The bladeless fan according to claim 3, characterized in that: A guide piece (51) is provided on the outer wall of the cylinder (42), a guide notch (52) is provided on the inner wall of the annular piece (44), and the guide notch (52) is slidably provided on the guide piece (51). A plurality of spring fixing holes (61) corresponding to the springs (45) are provided on the outer side of the fixing seat (41), and a plurality of spring positioning protrusions (62) corresponding to the springs (45) are provided on the inner side of the annular piece (44). One end of the spring (45) is provided in the spring fixing hole (61), and the other end is sleeved on the spring positioning protrusion (62).

5. The bladeless fan according to claim 1, characterized in that: The left nozzle assembly (7) and the right nozzle assembly (8) are both provided with an internal channel (71) for receiving airflow and an exhaust port (72) for discharging the airflow outwards, and a plurality of guide arc blades (81) for guiding the airflow to the exhaust port (72) are provided at intervals along the length direction of the internal channel (71) of the left nozzle assembly (7) and the right nozzle assembly (8).

6. The bladeless fan according to claim 5, characterized in that: When the guide arc blades (81) are arranged in intervals from the inside to the outside of the internal channel (71), the spacing between them increases sequentially.

7. The bladeless fan according to claim 1, characterized in that: The silencer cover (9) is a barrel-shaped structure with an upper end open, comprising a circular bottom plate (94), an outer annular side wall (95) and an inner annular side wall (96) arranged on the circular bottom plate (94), the outer air inlet (91) being arranged on the outer annular side wall (95), the inner air inlet (92) being arranged on the inner annular side wall (96), and the silencer channel (93) being arranged between the outer annular side wall (95) and the inner annular side wall (96).

8. The bladeless fan according to claim 7, characterized in that: A straight line segment between the center of the circular bottom plate (94) and the outer air inlet (91) is a first reference line (111), and a straight line segment between the center of the circular bottom plate (94) and the inner air inlet (92) is a second reference line (222). An angle A is formed between the first reference line (111) and the second reference line (222), and the angle A is 25-35°.

9. The bladeless fan according to claim 7, characterized in that: The muffler channel (93) is an arc-shaped structure or an S-shaped structure.

10. The bladeless fan according to claim 1, characterized in that: A silicone sealing gasket (100) is provided between the silencer cover (9) and the fan motor assembly (12).

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