Bernoulli principle fan, air outlet nozzle and external member

Abstract

The utility model discloses a Bernoulli principle fan which comprises an air outlet nozzle and an external member. The Bernoulli principle fan air outlet nozzle comprises a nozzle shell and an air outlet pipe. A shell cavity is formed in the nozzle shell and comprises an air outlet cavity and a pipe cavity; the upper air outlet end of the air outlet cavity is communicated with the lower air inlet end of the pipe cavity; the inner diameter of the air outlet cavity is reduced from the lower air inlet end to the upper air outlet end in the height direction; the pipe cavity extends in an inclined mode, and the air outlet pipe is installed in the pipe cavity so that the air outlet pipe can be kept in the inclined direction; the inclination angle of the air outlet pipe relative to the horizontal plane is 70-85 degrees. According to the scheme, the problems that the Bernoulli principle is presented mainly by holding an air blowing cylinder, the angle is unstable, and the angle needs to be adjusted frequently are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to Bernoulli principle accessory field especially relates to a Bernoulli principle fan, air outlet mouth and kit. BACKGROUND

[0002] Bernoulli principle is a basic principle in fluid mechanics, and the essence is the mechanical energy conservation of ideal fluid.Under ideal conditions, the sum of the kinetic energy, potential energy and pressure potential energy of unit volume fluid at any cross section of the same flow pipe is a constant.The most famous inference is that when the flow is equal, the greater the flow rate, the smaller the pressure.In fluid mechanics, the pressure usually refers to the pressure on unit area, that is, the pressure in ordinary physics.

[0003] The existing Bernoulli principle teaching aid generally blows the air to the lower part of the Bernoulli suspension balloon by holding the hair dryer;On the one hand, the wind path stability of Bernoulli principle is high, and manual holding of the hair dryer may cause the Bernoulli suspension balloon to stay in the air for a short time and fall;On the other hand, the angle of the wind direction needs to be frequently adjusted during debugging to adapt to the specific Bernoulli suspension balloon and maintain the stability of the Bernoulli suspension balloon, so the air nozzle needs to be frequently replaced;And replacing the air nozzle needs to recalibrate the angle of the air outlet nozzle, so that the replacement steps are more complicated. UTILITY MODEL CONTENT

[0004] The utility model discloses a Bernoulli principle fan air outlet nozzle, which is applied to a Bernoulli principle fan, the inner diameter of the air outlet cavity is reduced from the air inlet end at the lower part to the air outlet end at the upper part, and the air outlet pipe is kept at an inclined angle of 70-85 degrees for air outlet, so that the wind path can be stably output to the outside at a specific angle by only vertically installing the nozzle shell, so that the Bernoulli suspension balloon can be stably suspended in the air.

[0005] The utility model also discloses a Bernoulli principle fan, which is provided with the Bernoulli principle fan air outlet nozzle.

[0006] The utility model also discloses a Bernoulli principle kit, which uses the Bernoulli principle fan.

[0007] To achieve this purpose, the utility model adopts the following technical scheme:

[0008] A Bernoulli principle fan air outlet nozzle, comprising: a nozzle shell and an air outlet pipe;

[0009] The inside of the nozzle shell is provided with a shell cavity, and the shell cavity comprises: an air outlet cavity and a pipe cavity;

[0010] The air outlet cavity is communicated with the air inlet end of the tube cavity at the lower end; the inner diameter of the air outlet cavity is reduced from the air inlet end to the air outlet end; the tube cavity is inclined to extend, and the air outlet tube is installed in the tube cavity to keep the air outlet tube inclined; the inclination angle of the air outlet tube relative to the horizontal plane is 70-85°.

[0011] The air outlet tube can be optimized to sequentially include an accelerating section and a cylindrical section from low to high.

[0012] The accelerating section is limited at the lower air inlet end of the tube cavity and communicated with the air outlet end of the air outlet cavity; the accelerating section is communicated with the air inlet end of the cylindrical section at the upper end; the inner diameter of the accelerating section is gradually reduced from low to high to form a horn-shaped profile on the inner side of the accelerating section; and the inner side of the cylindrical section is in a cylindrical profile.

[0013] The outer tube sleeve can be further optimized to have a hollow structure, and the inner ring of the outer tube sleeve is sleeved on the outer side of the air outlet tube; and the outer side of the outer tube sleeve is provided with a decorative part.

[0014] The inclination angle of the air outlet tube relative to the horizontal plane can be optimized to be 76-82°, and the ratio between the inner diameter of the air outlet tube and the length of the air outlet tube is 1:(1-3).

[0015] The nozzle shell can be optimized to be composed of a nozzle male shell and a nozzle female shell, which are detachably assembled together; and the air outlet tube is detachably installed in the tube cavity.

[0016] The air outlet tube can be optimized to be inclined to form a lowest bottom air inlet part at one side and a next-lowest bottom air inlet part at the other side.

[0017] The air outlet cavity is provided with a low air guide wall and a high air guide wall on the two opposite inner side walls between the air inlet end and the air outlet end; the low air guide wall is connected to the lowest bottom air inlet part, and the high air guide wall is connected to the next-lowest bottom air inlet part.

[0018] The inclination angle of the high air guide wall relative to the horizontal plane is greater than the inclination angle of the low air guide wall relative to the horizontal plane.

[0019] The inclination angle of the high air guide wall relative to the horizontal plane can be optimized to be 50-75°, and the inclination angle of the low air guide wall relative to the horizontal plane is 30-49°.

[0020] A Bernoulli principle fan, an impeller, a fan cover, and an air outlet nozzle of the Bernoulli principle fan.

[0021] The fan cover is provided with a wind cavity, the outlet end of the wind cavity is a vertical upward cavity outlet; the impeller is installed in the wind cavity; the nozzle shell is detachably vertically installed in the cavity outlet, and the air inlet end of the air outlet cavity below is communicated with the cavity outlet.

[0022] The hand-held model shell and the fan driver can be optimized.

[0023] The inside of the hand-held model shell is provided with an inner cavity; the fan cover and the fan driver are fixed in the inner cavity, the tube cavity is exposed on the upper surface of the hand-held model shell, and the air outlet tube extends out of the inner cavity; the hand-held model shell is provided with a movable adjustment model joint key, the output end of the fan driver is connected to the impeller for driving the rotation of the impeller; the fan switch of the fan driver is arranged in the inner cavity and located in the movable range of the model joint key, and the model joint key is moved to contact or separate from the fan switch.

[0024] A Bernoulli principle kit, comprising: a Bernoulli suspension balloon and the Bernoulli principle fan.

[0025] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0026] The Bernoulli principle fan air outlet nozzle is applied to the Bernoulli principle fan, the inner diameter of the air outlet cavity is reduced from the air inlet end below to the air outlet end above, and the air outlet tube is kept at an inclination angle of 70-85° for air outlet, so that the air path is stably output to the outside at a specific angle by only vertically installing the nozzle shell, so that the Bernoulli suspension balloon is stably suspended in the air, and the problem of unstable angle and frequent angle adjustment of the Bernoulli principle realized by holding the air blower is solved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a cross-sectional structure schematic diagram of one embodiment of the Bernoulli principle fan air outlet nozzle;

[0028] Figure 2 is a structure explosion schematic diagram of one embodiment of the Bernoulli principle fan;

[0029] Figure 3 is a structure schematic diagram of one embodiment of the Bernoulli principle fan;

[0030] Figure 4 is a structure schematic diagram of one embodiment of the Bernoulli principle kit.

[0031] Among them:

[0032] Nozzle shell 1, air outlet pipe 2; outer pipe sleeve 3; impeller 4, fan cover 5; hand model shell 6, fan driver 7; Bernoulli suspension balloon 8; Bernoulli principle fan air outlet nozzle 01;

[0033] Shell cavity 11, nozzle male shell 12, nozzle female shell 13; air outlet cavity 111, pipe cavity 112; air guide low wall 113, air guide high wall 114;

[0034] Acceleration section 21, cylindrical section 22; bottommost air inlet part 23; second bottom air inlet part 24;

[0035] Decoration 31;

[0036] Air forming cavity 51; cavity air outlet 52; shell inner cavity 61; model joint key 62; fan switch 71 。 DETAILED DESCRIPTION

[0037] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "inner side", "outer side", "inner end", "outer end", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features limited as "first" and "second" can explicitly or implicitly include one or more features for distinguishing the described features, and there is no order or difference. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0039] As Figures 1-4 A Bernoulli principle fan air outlet nozzle, comprising: a nozzle shell 1 and an air outlet pipe 2;

[0040] The inside of the nozzle shell 1 is provided with a shell cavity 11, and the shell cavity 11 comprises an air outlet cavity 111 and a pipe cavity 112;

[0041] The air outlet end of the air outlet cavity 111 at the upper side is communicated with the air inlet end of the tube cavity 112 at the lower side; the inner diameter of the air outlet cavity 111 is reduced in the height direction from the air inlet end at the lower side to the air outlet end at the upper side; the tube cavity 112 is inclined to extend, and the air outlet tube 2 is installed in the tube cavity 112, so that the air outlet tube 2 is kept inclined; the inclination angle of the air outlet tube 2 relative to the horizontal plane is 70-85°.

[0042] The present scheme provides a Bernoulli principle fan air outlet nozzle, which is applied to a Bernoulli principle fan. The inner diameter of the air outlet cavity 111 is reduced from the air inlet end at the lower side to the air outlet end at the upper side, and the air outlet tube 2 is kept inclined at an angle of 70-85° to blow air. The nozzle shell 1 is only needed to be installed vertically to make the air path stably output to the outside at a specific angle, so that the Bernoulli suspension balloon 8 is stably suspended in the air, and the problem of unstable angle and frequent angle adjustment caused by the Bernoulli principle being mainly realized by holding the air blower is solved.

[0043] Specifically, the Bernoulli principle fan air outlet nozzle of the present scheme has the nozzle shell 1 sequentially provided with the air outlet cavity 111 and the tube cavity 112 from low to high. The air outlet cavity 111 is used to receive air at the lower side and output the air to the tube cavity 112. The inner diameter of the air outlet cavity 111 is gradually reduced from the lower side to the upper side, so that the inner diameter of the air outlet cavity 111 at the air inlet end at the lower side is greater than that at the air outlet end at the upper side. Therefore, the air is accelerated when being transported from the lower side to the upper side to the tube cavity 112, so that the airflow is concentrated and output to the tube cavity 112. The tube cavity 112 outputs the air to the outside and towards the Bernoulli suspension balloon 8 at an oblique upper side. The inclination angle a of the air outlet tube 2 relative to the horizontal plane is 70-85° in the present scheme, so that the air outlet tube 2 can keep blowing air to the Bernoulli suspension balloon 8 at an angle of 70-85°, so that the Bernoulli suspension balloon 8 rotates and suspends in the air according to the Bernoulli principle. In this way, the present scheme only needs to fix the position of the nozzle shell 1 to keep the inclination angle of the air outlet tube 2 relative to the horizontal plane at 70-85°, so that a stable air outlet angle can be kept during the Bernoulli principle display, thereby avoiding the problem of unstable air path caused by holding the air blower.

[0044] Optimally, the air outlet tube 2 sequentially includes the acceleration section 21 and the cylindrical section 22 from low to high.

[0045] The acceleration section 21 is limited to the tube cavity 112 at the air inlet end at the lower side and is communicated with the air outlet end of the air outlet cavity 111 at the upper side. The acceleration section 21 is communicated with the air inlet end of the cylindrical section 22 at the lower side at the air outlet end at the upper side. The inner diameter of the acceleration section 21 is gradually reduced from low to high, so that the inner side of the acceleration section 21 forms a horn-shaped profile. The inner side of the cylindrical section 22 is a cylindrical profile.

[0046] The inner profile of the air outlet pipe 2 is further improved in the embodiment, and specifically, the air outlet pipe 2 comprises, from low to high, an accelerating section 21 and a cylindrical section 22; when the accelerating section 21 receives air from the air outlet end of the air outlet cavity 111 above, the accelerating section 21 gradually narrows from low to high to form a horn-shaped profile, the accelerating section 21 forms a large-diameter end below and a small-diameter end above, so that the air can be further pressurized through the horn-shaped profile; and the cylindrical section 22 is located above the accelerating section 21, the inner side of the cylindrical section 22 is in a cylindrical profile, that is, the inner diameter of the air inlet end and the air outlet end of the cylindrical section 22 remains unchanged, so that the air maintains a stable speed after being accelerated by the accelerating section 21 and is output to the outside. In this way, after the Bernoulli principle fan air outlet nozzle is vertically installed at the air outlet end of the air outlet cavity 51, the air is output to the outside through the multi-stage acceleration of the air outlet cavity 111 and the pipe cavity 112, and the stability of the air path is further improved.

[0047] Optimally, the outer pipe sleeve 3 is further included, the inner side of the outer pipe sleeve 3 is hollow, the inner ring of the outer pipe sleeve 3 is sleeved on the outer side of the air outlet pipe 2, and the outer side of the outer pipe sleeve 3 is provided with a decorative part 31.

[0048] To adjust the parameters of the Bernoulli suspension balloon 8 during suspension, the inner side and the outer side of the air outlet pipe 2 can be shaped in the embodiment. The air outlet pipe 2 can be exposed outside the air outlet cavity 51, so the shape of the air outlet pipe 2 can affect the overall aesthetics of the Bernoulli principle fan and thus affect the teaching effect or the decorative effect. Therefore, the outer pipe sleeve 3 with a hollow structure is added in the embodiment, the inner ring of the outer pipe sleeve 3 is installed on the outer side of the air outlet pipe 2, so as to shield the outer structure of the air outlet pipe 2. The outer side of the outer pipe sleeve 3 is provided with a decorative part 31, which has a decorative effect, such as a decorative pattern layer, a decorative texture, a decorative edge, a decorative plate, a decorative model, etc., so as to improve the decorative aesthetics of the Bernoulli principle fan without affecting the output parameters of the air outlet pipe 2, and improve the interest.

[0049] Optimally, the inclination angle a of the air outlet pipe 2 relative to the horizontal plane is 76-82°, and the ratio between the inner diameter of the air outlet pipe 2 and the length of the air outlet pipe 2 is 1:(1-3).

[0050] The inclination angle a of the air outlet pipe 2 relative to the horizontal plane is further limited to 76-82° in the embodiment, and the ratio between the inner diameter of the air outlet pipe 2 and the length of the air outlet pipe 2 is 1:(1-3). Based on the inclination angle and the length-diameter ratio of the air outlet pipe 2, most of the Bernoulli suspension balloons 8 can adapt to the parameters of the air outlet pipe 2. Especially when the inclination angle a of the air outlet pipe 2 relative to the horizontal plane is further limited to 76-82°, the ratio between the inner diameter of the air outlet pipe 2 and the length of the air outlet pipe 2 is 1:(1.5-2.5), and the adaptability is the widest.

[0051] Optimally, the nozzle shell 1 is composed of a nozzle male shell 12 and a nozzle female shell 13, which are detachably assembled together; the air outlet pipe 2 is detachably installed in the pipe cavity 112.

[0052] The nozzle shell 1 of the present scheme uses a detachable connection mode, so that the air outlet cavity 111 and the pipe cavity 112 with specific structures are machined in the shell cavity 11, thereby simplifying the production cost of the Bernoulli principle fan air outlet nozzle; further, the air outlet pipe 2 is detachably installed in the pipe cavity 112, and the nozzle male shell 12, the nozzle female shell 13 and the air outlet pipe 2 can be produced in steps, thereby reducing the production cost of the shell cavity 11 and the air outlet pipe 2 due to the high complexity of the internal structure. Further, the nozzle male shell 12 and the nozzle female shell 13 can be vertically installed in the cavity air outlet 52 of the air outlet cavity 51 after being assembled into a complete nozzle shell 1, and then the impeller 4 and the fan cover 5 are fixed to the hand model shell 6, the pipe cavity 112 of the nozzle shell 1 is exposed to the upper surface of the hand model shell 6, so that the air outlet pipe 2 can be directly installed in the pipe cavity 112, and the detachable structure of the air outlet pipe 2 simplifies the installation difficulty of the Bernoulli principle fan.

[0053] Optimally, the air outlet pipe 2 is inclined, and the air inlet end below the air outlet pipe 2 forms a lowest bottom air inlet part 23 on one side and a second lowest bottom air inlet part 24 on the other side.

[0054] The air outlet cavity 111 is provided with a low air guide wall 113 and a high air guide wall 114 on the two opposite inner side walls between the air inlet end and the air outlet end; the low air guide wall 113 is connected to the bottom air inlet part 23, and the high air guide wall 114 is connected to the second bottom air inlet part 24.

[0055] The inclination angle b of the high air guide wall 114 relative to the horizontal plane is greater than the inclination angle c of the low air guide wall 113 relative to the horizontal plane.

[0056] As known in the art, when the tubular object is in a columnar structure and is inclined, the tubular object will have a height difference at the bottom; for this, the air outlet pipe 2 in this scheme forms the lowest air inlet part 23 at the side of the lowest position and the next lowest air inlet part 24 at the opposite side of the lowest air inlet part 23 when it is inclined; this embodiment further designs the inner contour structure of the air outlet cavity 111. The air outlet cavity 111 transitions from the air inlet end to the lowest air inlet part 23 at the air outlet end through the air guide low wall 113 and transitions from the air inlet end to the next lowest air inlet part 24 at the air outlet end through the air guide high wall 114; and the air guide low wall 113 and the air guide high wall 114 are opposite inner walls with different inclination angles, specifically, the inclination angle b of the air guide high wall 114 relative to the horizontal plane is greater than the inclination angle c of the air guide low wall 113 relative to the horizontal plane; thus, the air flowing through the air outlet cavity 111 forms different flow rates and flow directions at the air guide low wall 113 and the air guide high wall 114, respectively, so that different air paths are formed at the two sides of the lowest air inlet part 23 and the next lowest air inlet part 24 when the air outlet pipe 2 discharges air, thereby increasing the lift difference of the Bernoulli suspension balloon 8 and improving the stability of the Bernoulli suspension balloon 8.

[0057] Optimally, the inclination angle b of the air guide high wall 114 relative to the horizontal plane is 50-75°; and the inclination angle c of the air guide low wall 113 relative to the horizontal plane is 30-49°.

[0058] Under this inclination angle, the inclination angle of the air outlet pipe 2 relative to the horizontal plane is 76-82°, and the ratio between the inner diameter of the air outlet pipe 2 and the length of the air outlet pipe 2 is 1:(1-3), under which the air outlet pipe 2 can keep the Bernoulli suspension balloon 8 rotating for a long time without falling in the suspended state at a wind speed of 10-15 m / s, and the suspension stability is the best.

[0059] A Bernoulli principle air blower, a impeller 4, a wind cover 5 and the above-mentioned Bernoulli principle air blower air outlet nozzle 01;

[0060] The wind cover 5 is provided with a wind cavity 51, the air outlet end of the wind cavity 51 is a cavity air outlet 52 vertically upward; the impeller 4 is installed in the wind cavity 51; the nozzle housing 1 is vertically detachably installed in the cavity air outlet 52, and the air outlet cavity 111 is communicated with the cavity air outlet 52 at the air inlet end below.

[0061] The wind cover 5 is the main air generating position of the Bernoulli principle fan, and the air cavity is provided with a forming air cavity 51. The cavity air outlet 52 of the forming air cavity 51 is vertically oriented to match the vertical installation of the nozzle shell 1. The inner side wall of the cavity air outlet 52 directly or indirectly contacts the outer side wall of the nozzle shell 1, thereby maintaining the vertical installation of the nozzle shell 1. When the nozzle shell 1 is installed on the cavity air outlet 52, the rotation of the impeller 4 can suck air from the outside of the forming air cavity 51 (for example, through the air inlet hole on the surface of the hand-made model shell 6), and the air is transferred to the cavity air outlet 52 from the forming air cavity 51, and then to the air outlet cavity 111. The cavity air outlet 52 of the present scheme is vertically oriented, and the nozzle shell 1 only needs to be vertically installed on the cavity air outlet 52, so that the air outlet pipe 2 of the Bernoulli principle fan can maintain the optimal air outlet angle to form a stable air path, and the nozzle shell 1 and the air outlet pipe 2 can be easily disassembled during the design and debugging of the fan, thereby debugging the Bernoulli suspension balloon 8 to the optimal state, and simplifying the disassembly step of the debugging process.

[0062] The hand-made model shell 6 and the fan driver 7 can be further optimized.

[0063] The inside of the hand-made model shell 6 is provided with an inner cavity 61. The wind cover 5 and the fan driver 7 are fixed to the inner cavity 61. The pipe cavity 112 is exposed on the upper surface of the hand-made model shell 6, and the air outlet pipe 2 extends out of the inner cavity 61. The hand-made model shell 6 is provided with a movable model joint key 62. The output end of the fan driver 7 is connected to the impeller 4 for driving the rotation of the impeller 4. The fan switch 71 of the fan driver 7 is arranged in the inner cavity 61 and located in the movable range of the model joint key 62. The model joint key 62 is movable to contact or separate from the fan switch 71.

[0064] The Bernoulli principle fan of the present scheme is generally used in combination with the Bernoulli suspension balloon 8 for teaching demonstration or home decoration, and the single wind cover 5 lacks interest and decoration. Therefore, the wind cover 5 is arranged in the inner cavity 61 of the hand-made model shell 6 to block the wind cover 5 by the hand-made model, thereby improving the aesthetic appearance during the display of the Bernoulli principle. The hand-made model shell 6 may affect the external control of the impeller 4. Therefore, the model joint key 62 of the hand-made model shell 6 is linked. According to common knowledge, the hand-made model generally has hand joints, leg joints, head joints, etc. to provide movability. The hand-made model shell 6 of the present scheme also has a movable model joint key 62 which can contact the fan switch 71 during movement, thereby starting or controlling the fan driver 7. The fan driver 7 can be directly controlled externally without affecting the aesthetic appearance. Meanwhile, the pipe cavity 112 is exposed on the upper surface of the hand-made model shell 6, which is convenient for installing the air outlet pipe 2 after the hand-made model shell 6 is assembled, thereby reducing the installation difficulty of the air outlet pipe 2.

[0065] A Bernoulli principle kit comprising: a Bernoulli levitation balloon 8 and a Bernoulli principle fan as described above.

[0066] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made therein without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A Bernoulli principle fan nozzle, characterized by, The nozzle shell and the air outlet pipe are included. The inside of the nozzle shell is provided with a shell cavity, which includes an air outlet cavity and a pipe cavity. The air outlet cavity is communicated with the air inlet end of the pipe cavity at the upper air outlet end. The inner diameter of the air outlet cavity is reduced from the air inlet end to the air outlet end.

2. A Bernoulli principle fan nozzle according to claim 1, wherein, The pipe cavity is inclined, and the air outlet pipe is installed in the pipe cavity to keep the air outlet pipe inclined. The inclination angle of the air outlet pipe relative to the horizontal plane is 70-85°.

3. A Bernoulli principle fan nozzle according to claim 1, wherein, The air outlet pipe includes an accelerating section and a cylindrical section from low to high. The accelerating section is limited in the pipe cavity at the lower air inlet end and communicated with the air outlet end of the air outlet cavity.

4. A Bernoulli principle fan nozzle according to claim 1, wherein, The inner diameter of the accelerating section is gradually reduced from low to high to form a horn-shaped profile on the inner side of the accelerating section.

5. A Bernoulli principle fan nozzle according to claim 1, wherein, The inner side of the cylindrical section is a cylindrical profile.

6. A Bernoulli principle fan nozzle according to any one of claims 1 to 5, wherein, Further included are: The inside of the outer pipe sleeve is a hollow structure, and the inner ring of the outer pipe sleeve is sleeved on the outer side of the air outlet pipe. The outer side of the outer pipe sleeve is provided with a decorative part.

7. A Bernoulli principle fan nozzle according to claim 6, wherein, The inclination angle of the air outlet pipe relative to the horizontal plane is 76-82°, and the ratio between the inner diameter of the air outlet pipe and the length of the air outlet pipe is 1:(1-3).

8. A Bernoulli principle fan characterized by, The nozzle shell is composed of a nozzle male shell and a nozzle female shell, which are detachably assembled together. The air outlet pipe is detachably installed in the pipe cavity.

9. A Bernoulli principle fan as claimed in claim 8, characterized in that The air outlet pipe is inclined to form a lowest bottom air inlet part on one side and a second lowest bottom air inlet part on the other side. The two opposite inner side walls of the air outlet cavity between the air inlet end and the air outlet end are respectively provided with a low air guide wall and a high air guide wall. The inclination angle of the high air guide wall relative to the horizontal plane is greater than that of the low air guide wall.

10. A Bernoulli principle kit characterized by, The inclination angle of the high air guide wall relative to the horizontal plane is 50-75°, and the inclination angle of the low air guide wall relative to the horizontal plane is 30-49°. The impeller, the fan cover, and the air outlet nozzle of the Bernoulli principle fan according to any one of claims 1-7. The fan cover is provided with an air forming cavity, and the air outlet end of the air forming cavity is a vertical upward cavity air outlet. The impeller is installed in the air forming cavity. The nozzle shell is detachably vertically installed in the cavity air outlet, and the air inlet end of the air outlet cavity is communicated with the cavity air outlet. Further included are: The hand model shell and the fan driver. The inside of the hand model shell is provided with a shell cavity. The fan driver is fixed in the shell cavity, the pipe cavity is exposed on the upper surface of the hand model shell, and the air outlet pipe extends out of the shell cavity. The hand model shell is provided with a model joint key with adjustable activity. The output end of the fan driver is connected to the impeller to drive the rotation of the impeller. The fan switch of the fan driver is arranged in the shell cavity and located in the activity range of the model joint key. Included are: A Bernoulli floatation balloon and a Bernoulli principle fan as claimed in claim 8.

Images