WO2018157337A1

WO2018157337A1 - Fan head and bladeless fan

Info

Publication number: WO2018157337A1
Application number: PCT/CN2017/075361
Authority: WO
Inventors: 李忠华; 程杰锋; 魏喜明
Original assignee: 美的集团股份有限公司
Priority date: 2017-03-01
Filing date: 2017-03-01
Publication date: 2018-09-07
Also published as: CN107636317B; CN107636317A

Abstract

A fan head and a bladeless fan, the fan head comprises a first cavity (102) and a second cavity (104) each having a columnar shape. The second cavity (104) is located in the first cavity (102). A side face of the first cavity (102) is provided with a first air outlet (106) along a length direction of the first cavity (102). A side face of the second cavity (104) is provided with a second air outlet (108) along a length direction of the second cavity (104). An opening direction of the second air outlet (108) is different from an opening direction of the first air outlet (106). A bottom face of the second cavity (104) is provided with an air inlet (110) which is in communication with the second air outlet (108). An airflow passage (116) which is in communication with the second air outlet (108) and the first air outlet (106) is formed between an inner surface of the first cavity (102) and an outer surface of the second cavity (104). In a bladeless fan having the fan head, airflow enters the second cavity (104) through the air inlet (110) and is ejected outward through the second air outlet (108), the airflow passage (116) and the first air outlet (106), so that a flow path of the airflow in the fan head increases to eliminate or weaken the noise, and at the same time, the inner and outer double-layered cavities can also play the role of sound insulation, thereby improving the user experience.

Description

Fan head and leafless fan

Technical field

The invention relates to the field of living appliances, in particular to a fan head and a bladeless fan.

Background technique

In the related art, the bladeless fan includes a fan head. The fan head is provided with a duct and an air outlet. When the bladeless fan is working, the airflow easily forms a large wind noise at the air outlet, thereby reducing the user experience.

Summary of the invention

The present invention aims to at least solve one of the technical problems existing in the related art. To this end, the present invention needs to provide a fan head and a bladeless fan.

A fan head according to an embodiment of the present invention is used for a bladeless fan, the fan head includes a first cavity and a second cavity which are both in a column shape, and the second cavity is located in the first cavity a first air outlet is defined in a side of the first cavity, and a second air outlet is opened along a length of the second cavity. The opening direction of the second air outlet is different from the opening direction of the first air outlet, and the bottom surface of the second cavity is provided with an air inlet communicating with the second air outlet, and the inner surface of the first cavity is An air flow passage connecting the second air outlet and the first air outlet is formed between outer surfaces of the second cavity.

In the fan head of the embodiment of the present invention, the airflow enters and exits the second cavity through the air inlet, and is sprayed outward through the second air outlet, the air flow passage and the first air outlet, so that the flow path of the airflow inside the fan head is increased. It can eliminate or weaken the noise. At the same time, the inner and outer two-layer cavity can also play the sound insulation function, thereby realizing the low noise fan head and improving the user experience.

In some embodiments, the first air outlet has a slit shape, and the second air outlet has a slit shape.

In some embodiments, the fan head includes a deflector located in the first cavity, the baffle connecting one side edge of the first air outlet and one side of the second air outlet An edge, the baffle being spaced opposite the inner surface of the first cavity to form the airflow passage.

In some embodiments, the number of the air flow passages is two, the fan head includes a connecting partition, and the connecting partition connects the inner surface of the first cavity and the outer side of the second cavity The surfaces are spaced apart from the two airflow passages.

In some embodiments, the first cavity is provided with a first columnar chamber along a length of the first cavity, and the second cavity is located in the first columnar cavity, the first The second cavity is provided with a second columnar chamber along the length direction of the second cavity, the number of the first air outlets is two, and the number of the second air outlets is two. The first cylindrical chamber communicates with the two second air outlets and the two first air outlets, and the second cylindrical chamber communicates with the air inlet and the two second air outlets, An inner surface of the first cavity, a surface of the baffle opposite the inner surface of the first cavity, and an outer surface of the second cavity opposite the inner surface of the first cavity A portion of the first cylindrical chamber defined as the air flow passage.

In some embodiments, the first air outlet has a thickness gap ranging from 0.5 to 3 mm.

In some embodiments, the second air outlet has a thickness gap ranging from 0.5 to 3 mm.

In some embodiments, the second cavity is a constant pressure chamber.

In some embodiments, the first cavity is a constant pressure chamber.

In some embodiments, the inner surface of the first cavity is a Coanda surface, and the surface of the baffle opposite the inner surface of the first cavity is a Coanda surface, the ke The Enda surface has an air ejector effect and an increase in the air volume of the first air outlet.

In certain embodiments, the Coanda surface is a slowly transitioning surface and is used to gradually increase the flow rate of the gas stream.

In certain embodiments, the second cavity has an inner diameter ranging from 30 to 60 mm.

In some embodiments, the fan head satisfies the following conditional formula: d=0～±0.15R, where R represents the diameter of the first cylindrical chamber, and d represents the first air outlet to the first The vertical distance of a cylindrical chamber.

In some embodiments, the fan head satisfies the following conditional formula: d3 = 0 to 2d, wherein d represents a vertical distance from the first air outlet to the first columnar chamber, and d3 represents the first The vertical distance from the inside of the air outlet to the first cylindrical chamber.

In some embodiments, the fan head includes a first sealing plate and a second sealing plate, the first sealing plate sealingly connecting the lower end inner surface of the first cavity and the lower end of the second cavity And a second sealing plate sealingly connecting the upper end of the first cavity and the upper end of the second cavity.

In some embodiments, a bottom surface of the second cavity is formed with a flange surrounding the air inlet, the fan head includes a seal, the seal includes an upper end and a lower end, and the upper end sealingly connects the a flange having a tapered expanded configuration.

In certain embodiments, the fan head includes a connecting rib that connects an inner surface of the first cavity and a surface of the baffle opposite the inner surface of the first cavity.

In some embodiments, the size of the connecting ribs satisfies the following condition: 0 < L3 ≤ 4, 0 < W3 ≤ 4, L3 represents the length of the connecting rib, and W3 represents the width of the connecting rib.

A bladeless fan according to an embodiment of the present invention includes the fan head of any of the above embodiments.

In the bladeless fan of the embodiment of the present invention, the airflow enters and exits the second cavity through the air inlet, and is sprayed outward through the second air outlet, the air flow passage, and the first air outlet, so that the flow path of the airflow inside the fan head Increase, eliminate Or weaken the effect of noise, at the same time, the inner and outer two-layer cavity can also play the sound insulation function, thereby achieving a low-noise fan head and improving the user experience.

Additional aspects and advantages of the embodiments of the invention will be set forth in part in the description.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic perspective view of a fan head according to an embodiment of the present invention.

2 is a schematic cross-sectional view of a fan head according to an embodiment of the present invention.

3 is another schematic cross-sectional view of a fan head according to an embodiment of the present invention.

4 is a further cross-sectional view of the fan head of the embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view showing another embodiment of the fan head according to the embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view showing still another embodiment of the fan head according to the embodiment of the present invention.

Fig. 7 is a schematic perspective view of a sealing member of a fan head according to an embodiment of the present invention.

Fig. 8 is still another schematic cross-sectional view of a fan head according to an embodiment of the present invention.

9 is a perspective view of a bladeless fan according to an embodiment of the present invention.

Fig. 10 is a perspective view showing the base of the bladeless fan according to the embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientations of "post", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the present invention and the simplified description, and is not intended to indicate or imply that the device or component referred to has a specific orientation, and is constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the invention. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include one or more of the described features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or connected in one piece. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, which can be the internal communication of two elements or the interaction of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

Referring to FIG. 1 to FIG. 3 together, a fan head 10 according to an embodiment of the present invention is used for the bladeless fan 100. The fan head 10 includes a first cavity 102 and a second cavity 104 each having a columnar shape. The second cavity 104 is located in the first cavity 102. The side surface of the first cavity 102 is along the length direction of the first cavity 102. A first air outlet 106 is opened, and a side of the second cavity 104 is provided with a second air outlet 108 along a length direction B2 of the second cavity 104. The opening direction A2 of the second air outlet 108 is different from the first air outlet 106. Opening direction A1 (see Figure 3).

The bottom surface of the second cavity 104 is provided with an air inlet 110 communicating with the second air outlet 108. The inner surface 112 of the first cavity 102 and the outer surface 114 of the second cavity 104 are formed to communicate with the second air outlet 108 and The air flow passage 116 of the first air outlet 106.

In the fan head 10 of the embodiment of the present invention, the airflow enters and exits the second cavity 104 from the air inlet 110, and is sprayed outward through the second air outlet 108, the air flow passage 116, and the first air outlet 106, so that the airflow is in the fan. The flow path inside the head 10 is increased to eliminate or attenuate the noise. At the same time, the inner and outer two-layer cavities can also function as sound insulation, thereby realizing the low-noise fan head 10 and improving the user experience.

Further, since the opening direction A2 of the second air outlet 108 is different from the opening direction A1 of the first air outlet 106, a labyrinth soundproof cavity is formed inside the fan head 10, which is more favorable for noise reduction of the fan head 10.

In one example, the opening direction A2 of the second air outlet 108 and the opening direction A1 of the first air outlet 106 are at an angle greater than 90 degrees and less than 180 degrees, so that the flow path of the airflow in the fan head 10 is long and the fan head 10 The direction of the wind is moderate.

Specifically, the fan head 10 can be mounted on the base of the bladeless fan 100, and a high-pressure airflow is provided by the base. The high-pressure airflow enters the interior of the second cavity 104 through the air inlet, and enters the second air outlet 108 and the airflow passage 116. An air outlet 106 is ejected outwardly, and the outwardly ejected air stream entrains the air in the vicinity of the first air outlet 106 to form a wind perceived by the user.

The columnar first cavity 102 and the second cavity 104 may be provided in a cylindrical shape, a rectangular parallelepiped shape or the like. Preferably, the first cavity 102 and the second cavity 104 are both cylindrical, and thus, the cylindrical first cavity 102 can reduce the probability of the user being injured by accidental collision with the fan 10. Preferably, the first cavity 102 and the second cavity 104 are disposed coaxially, which reduces the space occupied by the fan head 10.

In certain embodiments, the length direction B1 of the first cavity 102 is parallel to the length direction B2 of the second cavity 104.

In some embodiments, the first air outlet 106 has a slit shape, and the second air outlet 108 has a slit shape.

In this way, the side area of the first cavity 102 and the second cavity 104 can be fully utilized, and the air outlet area and the air flow speed of the air outlet can be increased.

Specifically, the length L1 of the slit-shaped air outlet is larger than the width W1 of the air outlet. The slit-shaped air outlet may be a single continuous air outlet (as shown in FIG. 5), or may be a plurality of air outlets spaced apart along the length of the cavity. In the example of the present invention, the slit-shaped first air outlet 106 and the second air outlet 108 are both a single continuous air outlet.

In some embodiments, referring to FIG. 2, the fan head 10 includes a deflector 118 located in the first cavity 102. The deflector 118 connects the one side edge of the first air outlet 106 and the second air outlet 108. At one side edge, the baffles 118 are spaced from the inner surface 112 of the first cavity 102 to form an airflow passage 116.

As such, the baffles 118 are positioned such that the airflow is further rectified as it passes through the airflow passages 116, reducing airflow disturbances and reducing the chance of additional noise from the fan head 10.

Specifically, the length of the deflector 118 is longer than the length of the second air outlet 108, and is equivalent to the length of the first air outlet 106, which facilitates full-body rectification of the airflow ejected from the inside of the fan head 10 to the outside. Referring to FIG. 3, the cross-sectional shape of the deflector 118 in the longitudinal direction perpendicular to the fan head has a quadratic curve shape, thereby reducing the resistance of the airflow when flowing on the surface of the deflector 118, and the airflow is smoother.

In some embodiments, the number of airflow channels 116 is two, the fan head 10 includes a connection barrier 120 that connects the inner surface 112 of the first cavity 102 and the outer surface 114 of the second cavity 104 and The two air flow passages 116 are separated.

Thus, on the one hand, the two airflow passages 116 increase the air outlet area of the fan head 10, and on the other hand, the connection partition 120 is arranged to prevent the airflows in the two airflow passages 116 from interfering with each other to generate additional noise.

Specifically, in the embodiment of the present invention, the second cavity 104 is located in the first cavity 102, and an annular channel 122 is formed between the outer surface 114 of the second cavity 104 and the inner surface 112 of the first cavity 102. The first cavity 102 is provided with two first air outlets 106 spaced apart on opposite sides of the radial direction L2 of the annular passage 122, and the second cavity 104 is open with two second sides separated on both sides of the radial direction L2 of the annular passage 122. The air outlet 108, the connecting partition 120 connects the inner surface 112 of the first cavity 102 and the outer surface 114 of the second cavity 104 in the radial direction L2 of the annular passage 122 to space the annular passage 122 into two air flow passages 116.

In some embodiments, the first cavity 102 defines a first cylindrical chamber 124 along the length direction B1 of the first cavity 102, the second cavity 104 is located in the first cylindrical chamber 124, and the second cavity 104 A second columnar chamber 126 is opened along the length direction B2 of the second cavity 104. The number of the first air outlets 106 is two, the number of the second air outlets 108 is two, and the first columnar chambers 124 are connected to two. The second air outlet 108 and the two first air outlets 106 communicate with the air inlet 110 and the two second air outlets 108. The inner surface 112 of the first cavity 102, the surface 127 of the baffle 118 opposite the inner surface 112 of the first cavity 102, and the inner surface of the first cavity 102 A portion of the first cylindrical chamber 124 defined by the outer surface of the opposing second cavity 104 is defined as the air flow passage 116.

In this way, the fan head 100 can be ventilated up and down, and the wind output area is ensured.

Specifically, the second columnar chamber 126 ensures that the airflow enters the second cavity 104 and maintains a certain pressure. The second columnar chamber 126 is a constant pressure chamber, which facilitates the first air outlet 106 and the second air outlet 108. The wind is even. The first cylindrical chamber 124 is also a constant pressure chamber. Similarly, the first cylindrical chamber 124 ensures uniform air flow from the first air outlet 106.

It should be pointed out that the constant pressure chamber means that the pressure of each gas in the chamber is almost the same, and there is no big difference. For example, the highest gas pressure and the lowest gas pressure in the chamber when the fanless fan used in the fan head 100 is operated. The difference between the set range can be determined by the parameters such as the size and shape of the air inlet and outlet of the control chamber, and the intake air volume of the chamber.

The air inlet 110 is located at the bottom surface of the second cylindrical chamber 126, the second air outlet 108 is located at the side of the second cylindrical chamber 126, and the first air outlet 106 is located at the side of the first cylindrical chamber 124. In this way, the static pressure chamber is realized in the first cavity 102 and the second cavity 104, and the dynamic pressure is weakened, so that the air outlets of the first air outlet 106 and the second air outlet 108 are uniform in the up and down direction. In some embodiments, the up and down direction of the first air outlet 106 is the same as the length direction B1 of the first cavity 102. In some embodiments, the up and down direction of the second air outlet 108 is the same as the length direction B2 of the second cavity 104.

In some embodiments, the second cylindrical chamber 126 has a cylindrical shape, and the inner surface 112 of the first cavity 102 constituting the air flow passage 116 is a circular arc surface. Thus, the flow resistance of the airflow in the airflow passage 116 is small, and the fan head 100 is more uniform in airflow. In some embodiments, the first cylindrical chamber 124 is cylindrical.

In some embodiments, referring to FIG. 6, the thickness gap d1 of the first air outlet 106 ranges from 0.5 to 3 mm.

In this way, the fan head 100 is ensured to have a good airflow ejector effect.

Specifically, the gap of the first air outlet 106 is limited, and the size of the first air outlet 106 (nozzle) gap determines the size of the ejector airflow, and the gap of the first air outlet 106 limited to the above range is such that the size of the ejector airflow is moderate. Meet the design requirements.

For example, d1 may be one of 0.5 mm, 1 mm, 1.2 mm, 1.8 mm, 2 mm, 2.5 mm, and 3 mm. Of course, in other examples, other numbers may be selected in the above range, and no specific limitation is imposed herein. .

In some embodiments, referring to FIG. 6, the thickness gap d2 of the second air outlet 108 ranges from 0.5 to 3 mm.

In this way, the fan head 100 is ensured to have a good airflow ejector effect.

Specifically, the gap of the second air outlet 108 is limited, and the size of the second air outlet 108 (nozzle) gap determines the size of the ejector airflow, and the gap of the second air outlet 108 limited to the above range is such that the size of the ejector airflow is moderate. Meet the design requirements.

For example, d2 may be one of 0.5 mm, 1 mm, 1.2 mm, 1.8 mm, 2 mm, 2.5 mm, and 3 mm. Of course, in other examples, other numbers may be selected in the above range, and no specific limitation is imposed herein. . In certain embodiments, d1 and d2 may be equal or unequal, depending on design requirements.

In some embodiments, the second cavity 104 is a constant pressure cavity.

In this way, the pressure in the second cavity 104 is ensured, the static pressure chamber is realized, the dynamic pressure of the airflow of the fan power system connected to the fan 100 is weakened, and the airflow is uniformly flowed to the second air outlet 108 (the nozzle). Further, it is ejected from the first air outlet 106, which is a uniform airflow, and ensures that the airflow of the fan head 100 is uniform at the upper and lower positions, thereby improving the air blowing effect.

It should be noted that the constant pressure chamber is provided with a constant pressure chamber. For example, in some embodiments, the second cylindrical chamber 126 opened by the second chamber 104 is a constant pressure chamber.

In certain embodiments, the first cavity 102 is a constant pressure cavity.

In this way, the pressure in the first cavity 102 is ensured, the static pressure chamber is realized, and the dynamic pressure of the airflow of the fan power system connected to the fan 100 is weakened, thereby ensuring that the airflow uniformly flows outside the fan head 100, so that the user feels Uniform natural wind, while ensuring that the fan head 100 up and down position is uniform, improving the wind effect.

It should be noted that the constant pressure chamber is provided with a constant pressure chamber. For example, in some embodiments, the first cylindrical chamber 124 opened by the first chamber 102 is a constant pressure chamber.

In certain embodiments, the inner surface 112 of the first cavity 102 is a Coanda surface, and the surface 127 of the baffle 118 opposite the inner surface 112 of the first cavity 102 is a Coanda surface, Coanda The surface has an air flow ejector effect and an increase in the air volume of the first air outlet 106.

Since the Coanda surface has airflow ejector, the airflow passes through the two Coanda surfaces as it is ejected outward from the airflow passage 116, so that the jetted airflow will drive the external airflow at the first air outlet 106, increasing the fan head 10 At the same time, the air outlet noise of the first air outlet 106 is low, which ensures a large air volume and a small noise fan head 100, which improves the user experience.

Specifically, the Coanda surface is a surface having a Coanda effect.

As such, the Coanda surface can further optimize airflow ejector.

Specifically, the curvature of the transition curve of the Coanda surface cannot be abruptly changed and gradually changes.

In certain embodiments, the inner diameter R1 of the second cavity 104 ranges from 30 to 60 mm.

In this way, the second cavity 104 can better match the air volume of the fan power system connected to the fan 100, and can ensure that the second cavity 104 is a constant pressure cavity, and at the same time, the second air outlet 108 is also considered. Thickness gap d2. The inner diameter R1 is the radius.

For example, the inner diameter R1 of the second cavity may be among 30 mm, 35 mm, 40 mm, 50 mm, and 60 mm. One, of course, in other examples, other numbers may be selected in the above range, and no specific limitation is imposed herein.

In certain embodiments, the inner diameter R1 of the second cavity refers to the diameter of the second cylindrical chamber 126.

In some embodiments, the fan head 10 satisfies the following conditional formula: d = 0 to ± 0.15R, where R represents the diameter of the first cylindrical chamber 124 and d represents the first air outlet 106 to the first cylindrical chamber 124 The vertical distance.

In this way, the Coanda effect and the wind effect of the fan head 10 can be optimized.

Specifically, FIGS. 3 and 4 are cross sections of the fan head 10 in a direction perpendicular to the length of the fan head. In the orientation shown in FIG. 3, d=0 to 0.15R indicates the distance when the first air outlet 106 is located on the lower side of the radial direction T1 of the first cylindrical chamber 124. In the orientation shown in FIG. 4, d= 0 to -0.15R indicate the distance when the first air outlet 106 is located above the radial direction T1 of the first columnar chamber 124.

In one example, d is equal to one of 0R (ie equal to 0), 0.09R, 0.1R, 0.12R, and 0.15R. Of course, in other examples, other numbers may also be selected in the above range. Make specific restrictions.

In some embodiments, referring to FIG. 6, the fan head satisfies the following conditional formula: d3=0 to 2d, where d represents the vertical distance of the first air outlet 106 to the first cylindrical chamber 124, and d3 represents the first The vertical distance from the inside of the tuyere 106 to the first cylindrical chamber 124.

In this way, under the limitation of the above conditional expression, the airflows exiting from the two first air outlets 106 on both sides of the first cavity 102 can be reasonably collected in the middle, so as not to cross the flow in the middle, so that the airflow is evenly forwarded. Boasting, improving the user experience.

In one example, d3 is equal to one of 0d, 0.5d, 0.15d, 0.18d, and 2d. Of course, in other examples, other numbers may be selected in the above range, and no specific limitation is imposed herein.

In some embodiments, referring to FIG. 5, the fan head 10 includes a first sealing plate 128 and a second sealing plate 130. The first sealing plate 128 sealingly connects the lower end inner surface 112 of the first cavity 102 with the second cavity. The lower end outer surface 114 of the 104, the second sealing plate 130 sealingly connects the upper end of the first cavity 102 and the upper end of the second cavity 104.

In this way, the airflow outside the fan head 10 can only enter from the air inlet 110, and then sprayed to the outside of the fan head 10 through the second air outlet 108, the air flow passage 116 and the first air outlet 106, thereby ensuring the working efficiency of the fan head 10.

Specifically, the first sealing plate 128 has an annular sealing plate, and the second sealing plate 130 has a flat sealing plate.

In some embodiments, referring to FIGS. 5 and 7, the bottom surface of the second cavity 104 is formed with a flange 132 surrounding the air inlet 110. The fan head 10 includes a sealing member 134. The sealing member 134 includes an upper end 136 and a lower end 138. The upper end 136 seals the connecting flange 132 and the lower end 138 has a tapered expanded configuration.

As such, the lower end 138 can be used to seal the outlet end of the power system coupled to the fan head 10, and the lower end 138 of the conical expansion configuration facilitates the lower end 138 when the fan head 10 is mounted on the corresponding base. The outlet end of the system, and the fan head 10 is more closely attached to the base, so that the arrangement of the sealing member 134 can reduce the probability of airflow pouring from the fan head 10 into the cavity of the base connected to the fan head 10, thereby reducing the probability The noise of the fan head.

Specifically, in order to improve the air blowing effect of the bladeless fan having the fan head 10, the fan head 10 is generally longer than the base. If the sealing member 134 is absent, since the airflow path in the fan head 10 is long, the airflow is easy to be made. Inverted in the cavity of the pedestal, forming a large wind noise, and the wind effect is poor. The sealing member 134 is disposed such that the sealing member 134 and the outlet end of the power system, and the sealing member 134 and the flange 132 are in a sealed and sealed state, thereby solving the above problems.

In order to make the sealing member 134 and the flange 132 more closely connected, the end surface of the upper end 136 is provided with a positioning groove 140. The outer side of the flange 132 can be formed with a card portion (not shown), and the card portion can be inserted into the positioning groove 140.

In one example, the seal 134 may be a silicone sealed hose having a hardness in the range of 50-60 and a moderately elastic stretch.

In certain embodiments, the fan head 100 includes a connecting rib (not shown) that connects the inner surface 112 of the first cavity 102 and the surface of the baffle 118 opposite the inner surface 112 of the first cavity 102. 127.

Thus, the arrangement of the connecting ribs can control the thickness gap of the first air outlet 106 and ensure the strength of the entire air duct. In the embodiment of the present invention, the connection of the connecting ribs can control the thickness gap d1 of the first air outlet 106.

In addition, when a plurality of connecting ribs are provided, the connecting ribs may not be too dense, and preferably, the distance between two adjacent connecting ribs may not be less than 50 mm.

Thus, in the case of ensuring the strength of the air passage of the fan head 100, the size of the connecting rib does not adversely affect the airflow of the fan head 100.

Referring to FIG. 2 and FIG. 3, when the fan head 100 of the embodiment of the present invention is in operation, the airflow AA (shown by a broken line with an arrow in the figure) enters the second cavity 104 from the air inlet 110 and passes through the second air inlet. 108 enters two airflow passages 116, and when the airflow AA is sprayed outward from the airflow passage 116, passing through the two Coanda surfaces, the Coanda surface has a function of airflow adhering such that the injected airflow AA is at the first air outlet 106 It will drive the external airflow and have the effect of ejector, increasing the air volume of the fan head 10.

The air inlet, the chamber, the passage, and the air outlet of the fan head 100 through which the air flow AA passes constitute the air passage of the fan head 100.

In the embodiment of the present invention, the fan head 100 of the present invention has a cylindrical shape. It can be understood that in other embodiments, the fan head may also have an outer shape of an elliptical shape and other deformed structures.

In some embodiments, the outer shape of the first cavity 102 can serve as the outer shape of the fan head 100. It should be noted that, in conjunction with FIG. 8, when designing the outer shape of the first cavity 102, the first cavity 102 is located at a portion 142 between the inner sides of the two first air outlets 106 (for convenience of explanation, the portion in FIG. 8 The shape of the 142 for black filling has substantially no effect on the airflow of the fan head 100. Therefore, this portion 142 can be formed into a desired shape according to the needs of the industrial design, so that the fan head is beautiful and generous.

Referring to FIG. 9 to FIG. 10 together, the bladeless fan 100 of the embodiment of the present invention includes any of the above embodiments. Fan head 10.

In the bladeless fan 100 of the embodiment of the present invention, the airflow enters and exits the second cavity 104 from the air inlet 110, and is sprayed outward through the second air outlet 108, the air flow passage 116, and the first air outlet 106, so that the air flow is The flow path inside the fan head 10 is increased to eliminate or weaken the noise. At the same time, the inner and outer two-layer cavities can also function as sound insulation, thereby realizing the low noise fan head 10 and improving the user experience.

Specifically, in the embodiment of the present invention, the bladeless fan 100 includes a power system 21 and a base 20. The power system 21 is housed in the base 20, and the fan head 10 is disposed on the base 20.

In this way, the placement of the bladeless fan 100 is facilitated, and the utility and stability of the bladeless fan 100 are improved.

In order to facilitate the intake of air, the base 20 includes a housing 22 including a wall 221, and an air inlet 222 is defined in the wall 221, and the power system 21 draws in air through the air inlet 222 to establish a high-pressure airflow and feed it to the fan head. Inside. The air inlets 222 are arranged in a plurality of spaced aperture arrays 224. Thus, in the case where the intake air amount of the susceptor 20 is ensured to be large, the housing 22 is also ensured to have a strong structural strength.

Specifically, a plurality of aperture arrays 224 are spaced apart along the circumference of the housing 22 to achieve omnidirectional intake of the susceptor 20.

In the present invention, the first feature "on" or "under" the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and below the second feature, or merely the first feature level being less than the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. In addition, the present invention may be repeated with reference to the numerals and/or reference numerals in the various examples, which are for the purpose of simplicity and clarity, and do not indicate the relationship between the various embodiments and/or arrangements discussed. Moreover, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the use of other processes and/or the use of other materials.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the manner or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

A fan head for a bladeless fan, characterized in that the fan head comprises a first cavity and a second cavity which are both in a column shape, and the second cavity is located in the first cavity a first air outlet is opened along a length of the first cavity, and a second air outlet is opened along a length of the second cavity. The opening direction of the second air outlet is different from the opening direction of the first air outlet, and the bottom surface of the second cavity is provided with an air inlet communicating with the second air outlet, and the inner surface of the first cavity is An air flow passage connecting the second air outlet and the first air outlet is formed between outer surfaces of the second cavity.
The fan head according to claim 1, wherein the first air outlet has a slit shape, and the second air outlet has a slit shape.
The fan head according to claim 1, wherein the fan head includes a deflector located in the first cavity, the baffle connecting one side edge of the first air outlet and the A side edge of the second air outlet, the deflector being spaced apart from an inner surface of the first cavity to form the air flow passage.
The fan head according to claim 3, wherein the number of the air flow passages is two, the fan head includes a connecting partition, and the connecting partition connects the inner surface of the first cavity and the The outer surface of the second cavity is spaced apart from the two airflow channels.
The fan head according to claim 3, wherein the first cavity is provided with a first cylindrical chamber along a length direction of the first cavity, and the second cavity is located at the first column In the chamber, the second cavity is provided with a second columnar chamber along the length direction of the second cavity, the number of the first air outlets is two, and the number of the second air outlets is two The first cylindrical chamber communicates with the two second air outlets and the two first air outlets, and the second cylindrical chamber communicates with the air inlet and the two second air outlets. An inner surface of the first cavity, a surface of the baffle opposite the inner surface of the first cavity, and an outer surface of the second cavity opposite the inner surface of the first cavity A portion of the first cylindrical chamber that is commonly defined by the surface serves as the air flow passage.
The fan head according to claim 5, wherein the first air outlet has a thickness gap ranging from 0.5 to 3 mm.
The fan head according to claim 5, wherein the second air outlet has a thickness gap ranging from 0.5 to 3 mm.
The fan head of claim 5 wherein said second cavity is a constant pressure cavity.
The fan head of claim 5 wherein said first cavity is a constant pressure cavity.
The fan head according to claim 5, wherein an inner surface of the first cavity is a Coanda surface, and a surface of the baffle opposite the inner surface of the first cavity is a ke On the Enda surface, the Coanda surface has an air flow ejector effect and an increase in the air volume of the first air outlet.
The fan head of claim 10 wherein said Coanda surface is a slowly transitioning surface and is used to gradually increase the flow rate of the gas stream.
The fan head according to claim 8, wherein said second cavity has an inner diameter ranging from 30 to 60 mm.
The fan head according to claim 6, wherein the fan head satisfies the following conditional expression:

d = 0 to ± 0.15R, wherein R represents the diameter of the first cylindrical chamber, and d represents the vertical distance from the first air outlet to the first cylindrical chamber.
The fan head according to claim 6, wherein the fan head satisfies the following conditional expression:

D3 = 0 to 2d, wherein d represents the vertical distance from the first air outlet to the first cylindrical chamber, and d3 represents the vertical distance from the inner side of the first air outlet to the first cylindrical chamber.
The fan head according to claim 1, wherein the fan head comprises a first sealing plate and a second sealing plate, the first sealing plate sealingly connecting the lower end inner surface of the first cavity with the a lower end outer surface of the second cavity, the second sealing plate sealingly connecting the upper end of the first cavity and the upper end of the second cavity.
The fan head according to claim 1, wherein a bottom surface of the second cavity is formed with a flange surrounding the air inlet, the fan head includes a sealing member, and the sealing member includes an upper end and a lower end. The upper end is sealingly connected to the flange, and the lower end has a conical expansion structure.
A fan head according to claim 10, wherein said fan head includes a connecting rib, said connecting rib connecting an inner surface of said first cavity and a surface opposite said inner surface of said first cavity The surface of the baffle.
The fan head according to claim 17, wherein the size of the connecting ribs satisfies the following conditions:

0 < L3 ≤ 4, 0 < W3 ≤ 4, L3 represents the length of the connecting rib, and W3 represents the width of the connecting rib.
A leafless fan characterized by comprising the fan head according to any one of claims 1-18.
A leafless fan according to claim 19, wherein said bladeless fan comprises a power system and a base, said power system being housed in said base, said fan head being disposed on said base The base includes a housing, the housing includes a wall, the wall is provided with an air inlet, and the power system draws in air through the air inlet to establish a high-pressure airflow and feeds the fan head The air inlets are arranged in a plurality of spaced aperture arrays.