Efficient cooling fan with diffusion air duct

Abstract

The utility model discloses an efficient heat dissipation fan with a diffusion air duct, which comprises a shell, the shell comprises an inner shell and an outer shell, the air duct is arranged between the inner shell and the outer shell, static air guide blades are arranged in the air duct, the static air guide blades comprise at least one group of diffusion static blades, and the diffusion static blades are arranged in the shell. The diffusion stationary blades enable the air passing area of the air duct to be gradually increased from the air inlet end to the air outlet end, specifically, in one embodiment, a first stationary blade and a second stationary blade can be arranged, and the air inlet end of the second stationary blade and the air outlet end of the first stationary blade are arranged in a staggered mode so as to enlarge the air passing area of the air duct. According to the high-speed draught fan, the air passing area of the air channel is gradually increased from the air inlet end to the air outlet end, part of kinetic energy of airflow can be converted into static pressure energy to be recovered, loss of airflow energy is avoided, the technical problem that the use efficiency of the draught fan is low due to the fact that an enclosure air channel of a traditional high-speed draught fan easily consumes the kinetic energy of the airflow is solved, and the high-speed draught fan has the beneficial effect of being high in efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed fans, in particular to a high-efficiency heat dissipation fan with a pressure-expanding air duct. Background Art

[0002] Currently, most high-speed hair dryers use brushless motors. Brushless motors offer advantages such as high efficiency, energy saving, long life, and low noise. They can provide stronger power and more stable rotational speed, thereby generating high-speed and stable airflow, effectively shortening the time it takes to dry hair. Traditional high-speed hair dryers include a housing with an air duct, which is equipped with static air guide blades. As the gas flows, its kinetic energy is gradually consumed by overcoming resistance along the way. The structure is relatively simple and prone to airflow turbulence, which in turn causes significant energy loss. This energy is dissipated in the form of heat, resulting in low overall air supply efficiency. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the utility model provides a high-efficiency heat dissipation fan with a diffuser air duct, which solves the technical problem that the casing air duct of the traditional high-speed fan easily loses the airflow kinetic energy, resulting in low fan efficiency.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions: a high-efficiency heat dissipation fan with a pressure diffuser air duct, comprising a casing, the casing comprising an inner casing and an outer casing, an air duct between the inner casing and the outer casing, static air guide blades being arranged in the air duct, the static air guide blades comprising at least one group of pressure diffuser static blades, the pressure diffuser static blades causing the air flow area of ​​the air duct to gradually increase from the air inlet end to the air outlet end.

[0005] Preferably, the static air guide blades include a first static blade and a second static blade, and the air inlet end of the second static blade is staggered with the air outlet end of the first static blade, so that the air flow area of ​​the air duct gradually increases from the air inlet end to the air outlet end.

[0006] Preferably, the thickness of the static air guide blade becomes thinner from the air inlet end to the air outlet end.

[0007] Preferably, it further includes a rotor assembly and a stator assembly, wherein the rotor assembly includes a rotating shaft and a magnetic ring, the rotating shaft is a hollow shaft, the magnetic ring is fixedly mounted on the rotating shaft, the rotor assembly is arranged in the internal cavity of the stator assembly, the inner shell or the outer shell has a stator mounting cavity, and the stator assembly is mounted in the stator mounting cavity.

[0008] Preferably, it further includes a fan blade, which is fixedly mounted on one end of the rotating shaft, and the magnetic ring is mounted on the other end of the rotating shaft.

[0009] Preferably, it further comprises a blade cover, wherein the clearance between the inner wall of the blade cover and the blade of the fan blade is 0.0-0.0 mm, and the shape of the inner wall of the blade cover is adapted to the outer contour of the moving blade of the fan blade.

[0010] Preferably, the blades of the fan blades adopt a semi-open chaotic fan blade integrated design.

[0011] Preferably, the inner shell has a bearing chamber for accommodating bearings, and the number of the bearings is at least two.

[0012] Preferably, a bearing sleeve is provided between the bearings.

[0013] Preferably, it further comprises an end cover, a bearing, and a stator assembly. The end cover and the inner shell are respectively provided with bearing chambers, bearings are respectively placed in the bearing chambers, and the stator assembly is arranged between the bearings.

[0014] Compared with the prior art, the beneficial effects obtained by the present invention are:

[0015] The utility model discloses a high-efficiency heat dissipation fan with a pressure diffuser duct, comprising a casing, the casing comprising an inner casing and an outer casing, an air duct between the inner casing and the outer casing, and static air guide blades arranged in the air duct, the static air guide blades comprising at least one group of pressure diffuser static blades, the pressure diffuser static blades making the air flow area of ​​the air duct gradually increase from the air inlet end to the air outlet end. Specifically, in one embodiment, a first static blade and a second static blade can be provided, the air inlet end of the second static blade and the air outlet end of the first static blade are staggered, or the thickness of the pressure diffuser static blade in another embodiment gradually becomes thinner from the air inlet end to the air outlet end, so as to expand the air flow area of ​​the air duct, so that the air flow area of ​​the air duct gradually increases from the air inlet end to the air outlet end, part of the kinetic energy of the air flow will be converted into static pressure energy and restored, thereby avoiding the loss of air flow energy, solving the technical problem that the casing air duct of a traditional high-speed fan easily loses the air flow kinetic energy, resulting in low fan efficiency, and having the beneficial effect of high fan efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0017] Figure 1 A cross-sectional view of a casing JJ of a high-efficiency heat dissipation fan with a pressure-expanding air duct according to the present invention is shown.

[0018] Figure 2 A cross-sectional view of a high-efficiency heat dissipation fan with a pressure-expanding air duct according to the present invention is shown.

[0019] Figure 3A schematic diagram of the fan blades of the high-efficiency heat dissipation fan with a pressure-expanding air duct of the present invention is shown.

[0020] Figure 4 A cross-sectional view of the fan blade cover of the high-efficiency heat dissipation fan with a pressure-expanding air duct of the present invention is shown.

[0021] Figure numerals: 1- housing; 11- inner housing; 111- bearing chamber; 12- outer housing; 13- static air guide blade; 131- first static blade; 132- second static blade; 2- rotor assembly; 21- rotating shaft; 22- magnetic ring; 3- stator assembly; 4- fan blade; 41- base; 42- moving blade; 5- fan blade cover; 6- bearing; 7- bearing sleeve. DETAILED DESCRIPTION

[0022] The following further illustrates the present invention with reference to the accompanying drawings and specific embodiments. However, the embodiments described are only a portion of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention. It is worth noting that the cross-sectional area of ​​the air passage and the air flow area are different expressions of the same meaning, both referring to the cross-sectional area of ​​the air duct through which air can pass.

[0023] Example 1

[0024] See also Figures 1 to 4, an efficient heat dissipation fan with a diffuser air duct, comprising a casing 1, a rotor assembly 2, a stator assembly 3, a fan blade 4, and a fan blade cover 5. The rotor assembly 2 is arranged in the internal cavity of the stator assembly 3, the rotor assembly 2 includes a rotating shaft 21 and a magnetic ring 22, the rotating shaft 21 is a hollow shaft, and the hollow shaft is used for the cooled objects to pass through, and the objects to be cooled are rapidly cooled through the dual effects of heat conduction and air flow; the fan blade 4 is fixedly mounted on one end of the rotating shaft 21, and the magnetic ring 22 is mounted on the other end of the rotating shaft 21; the casing 1 comprises an inner casing 11 and an outer casing 12, the inner casing 11 and the outer casing 12 are provided with an air duct, and a static air guide blade 13 is arranged in the air duct, the inner casing 11 or the outer casing 12 has a stator mounting cavity, and the stator assembly 3 is mounted in the stator mounting cavity; the moving blade 42 of the fan blade 4 adopts a semi-open chaotic fan blade integrated design, that is, the base 41 of the fan blade 4 is The concave curve rotates around the axis to form a rotating body structure, and the moving blades 42 of the fan blade 4 are twistedly arranged along the outer surface of the base 41 from the air inlet end to the air outlet end. The blades of the semi-open mixed flow fan are designed as an integrated unit, the blades are strong, and can operate at high speeds. The pressure generated by the fan is proportional to the square of the speed, which can greatly increase the static pressure of the fan. The high-speed fan can increase the frequency of aerodynamic noise generated by the blades, raise the frequency to above 15KHz, and improve the audio and noise values; the end of the moving blade 42 farthest from the rotation axis forms the outer contour of the moving blade, and the inner wall shape of the fan cover 5 is adapted to the outer contour of the moving blade 42 of the fan blade 4. The clearance between the inner wall of the fan cover 5 and the moving blade 42 of the fan blade 4 is 0.02mm. The inner shell 11 has a bearing chamber 111, and the bearing chamber 111 is used to place bearings 6. The number of bearings 6 is at least two, and a bearing sleeve 7 is provided between the bearings 6.

[0025] Furthermore, the static air guide blades 13 include a set of diffuser vanes that gradually increase the cross-sectional area of ​​the air passage from the inlet to the outlet. Specifically, the static air guide blades 13 include a first vane 131 and a second vane 132. The inlet end of the second vane 132 is staggered with the outlet end of the first vane 131, thereby gradually increasing the cross-sectional area of ​​the air passage from the inlet to the outlet. The diffusion principle is that the cross-sectional area of ​​the air passage gradually increases from the inlet to the outlet. This structural design is intended to achieve specific flow pattern changes and energy conversion for the airflow. According to relevant fluid mechanics principles such as the fluid continuity equation and the Bernoulli equation, the airflow velocity is relatively high and the pressure is relatively low at the inlet. As the cross-sectional area of ​​the air passage continues to expand, the airflow velocity gradually decreases while the static pressure gradually increases. In this way, the diffuser duct can transform high-speed, low-static-pressure airflow into low-speed, high-static-pressure airflow, increasing airflow volume and improving the overall efficiency of the fan.

[0026] Example 2

[0027] In another embodiment, a high-efficiency heat dissipation fan with a diffuser air duct includes a casing, a rotor assembly, a stator assembly, blades, blade covers, bearings and end covers, the casing includes an inner casing and an outer casing, an air passage is formed between the inner casing and the outer casing, a static air guide blade is provided in the air passage, the inner casing or the outer casing has a stator mounting cavity, the stator assembly is installed in the stator mounting cavity; the end cover and the inner casing are respectively provided with bearing chambers for placing the bearings, the stator assembly is arranged between two of the bearings, the rotor assembly is arranged in the internal cavity of the stator assembly, the rotor assembly includes a rotating shaft and a magnetic ring, the rotating shaft is a hollow shaft, the hollow shaft is used for the cooled objects to pass through, and the rapid cooling of the objects to be cooled is achieved through the dual effects of heat conduction and air flow.

[0028] Furthermore, the fan blade is fixedly mounted at one end of the rotating shaft, and the magnetic ring is mounted at the other end of the rotating shaft; the blades of the fan blade adopt a semi-open chaotic fan blade integrated design, that is, the base of the fan blade is a rotating body structure formed by rotating an inward concave curve around the axis, and the moving blades of the fan blade are twistedly arranged along the outer surface of the base from the air inlet end to the air outlet end, and the end of the moving blade farthest from the rotating shaft forms the outer contour of the moving blade, and the inner wall shape of the fan blade cover is adapted to the outer contour of the blade of the fan blade, and the fitting clearance between the inner wall of the fan blade cover and the blade of the fan blade is 1.0 mm.

[0029] Furthermore, the static wind guide blades include a group of diffuser static blades, and the diffuser static blades gradually increase the cross-sectional area of ​​the wind passage from the air inlet end to the air outlet end. Specifically, the thickness of a single blade of the diffuser static blade gradually becomes thinner from the air inlet end to the air outlet end, so that the cross-sectional area of ​​the wind passage from the air inlet end to the air outlet end gradually increases. According to relevant fluid mechanics principles such as the fluid continuity equation and the Bernoulli equation, as the cross-sectional area of ​​the wind passage continues to expand, the flow rate of the airflow will decrease accordingly, and the static pressure energy of the gas will increase accordingly. In this way, the diffuser air duct can convert a high-speed, low-static-pressure airflow into a low-speed, high-static-pressure airflow, thereby increasing the airflow volume and improving the overall efficiency of the fan.

[0030] The above examples are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above examples, and many similar modifications are possible. All modifications that can be directly derived or imagined by a person skilled in the art from the disclosure of the present invention should be considered to be within the scope of protection of the present invention.

Claims

1. A high-efficiency heat dissipation fan with a pressure-expanding air duct, characterized in that: The invention comprises a casing (1), wherein the casing (1) comprises an inner casing (11) and an outer casing (12), an air duct is provided between the inner casing (11) and the outer casing (12), and static air guide blades (13) are provided in the air duct, wherein the static air guide blades (13) comprise at least one group of pressure-expanding static blades, and the pressure-expanding static blades make the air flow area of ​​the air duct gradually increase from the air inlet end to the air outlet end.

2. The high-efficiency heat dissipation fan with a pressure-expanding air duct according to claim 1, characterized in that: The static air guide blade (13) comprises a first static blade (131) and a second static blade (132), wherein the air inlet end of the second static blade (132) and the air outlet end of the first static blade (131) are arranged alternately, so that the air flow area of ​​the air duct gradually increases from the air inlet end to the air outlet end.

3. The high-efficiency heat dissipation fan with a pressure-expanding air duct according to claim 1, characterized in that: The thickness of the static air guide blade (13) becomes thinner from the air inlet end to the air outlet end.

4. The high-efficiency heat dissipation fan with a pressure-expanding air duct according to claim 1, characterized in that: The invention also includes a rotor assembly (2) and a stator assembly (3), wherein the rotor assembly (2) includes a rotating shaft (21) and a magnetic ring (22), wherein the rotating shaft (21) is a hollow shaft, and the magnetic ring (22) is fixedly mounted on the rotating shaft (21); the rotor assembly (2) is arranged in an internal cavity of the stator assembly (3), and the inner shell (11) or the outer shell (12) has a stator mounting cavity, and the stator assembly (3) is mounted in the stator mounting cavity.

5. The high-efficiency heat dissipation fan with a pressure-expanding air duct according to claim 4, characterized in that: It also includes a fan blade (4), wherein the fan blade (4) is fixedly mounted on one end of the rotating shaft (21), and the magnetic ring (22) is mounted on the other end of the rotating shaft (21).

6. The high-efficiency heat dissipation fan with a pressure-expanding air duct according to claim 5, characterized in that: It also includes a fan blade cover (5), wherein the clearance between the inner wall of the fan blade cover (5) and the blade of the fan blade (4) is 0.02-1.0 mm, and the shape of the inner wall of the fan blade cover (5) is adapted to the outer contour of the moving blade (42) of the fan blade (4).

7. The high-efficiency heat dissipation fan with a pressure-expanding air duct according to claim 5, characterized in that: The blades of the fan blade (4) adopt a semi-open chaotic fan blade integrated design.

8. The high-efficiency heat dissipation fan with a pressure-expanding air duct according to claim 1, characterized in that: The inner shell (11) has a bearing chamber (111), and the bearing chamber (111) is used to place bearings (6), and the number of the bearings (6) is at least two.

9. The high-efficiency heat dissipation fan with a pressure-expanding air duct according to claim 8, characterized in that: A bearing sleeve (7) is provided between the bearings (6).

10. The high-efficiency heat dissipation fan with a pressure-expanding air duct according to claim 1, characterized in that: It also includes an end cover, a bearing, and a stator assembly. The end cover and the inner shell are respectively provided with bearing chambers, bearings are respectively placed in the bearing chambers, and the stator assembly is arranged between the bearings.

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