An energy-saving, airflow-directing cooling fan housing

Abstract

The application relates to an energy-saving guide-type heat-dissipation fan shell in the technical field of fans, which comprises a frame, the frame is hollowed out to form a fan accommodating cavity, a plurality of ribs are arranged in the fan accommodating cavity, and the ribs are integrally connected with the frame; any rib is sequentially formed with an upper section, a middle section and a lower section along the axial direction, the upper section is integrally connected with the shell, the diameter of the upper section is larger than that of the lower section, the diameter of the lower section is larger than that of the middle section, the axial dimension of the upper section is larger than that of the middle section, the axial dimension of the middle section is larger than that of the lower section, and the upper section, the middle section and the lower section are smoothly connected; a plurality of air guide rings are arranged on any rib, and any air guide ring is an annular protrusion arranged on the surface of the rib.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fans, and particularly relates to an energy-saving guide-type heat dissipation fan shell. BACKGROUND

[0002] A fan is a device for blowing air by using a motor to drive fan blades, and the air volume and uniformity of the blown air affect the use experience of the fan.

[0003] In the prior art, the air outlet of a cabinet air conditioner is mostly guided by a guide plate, which causes low air outlet comfort. In order to improve the air outlet experience, a feasible way is to blow the heat exchange air flow gathered by the indoor fan out of the mesh holes of the air outlet panel of the air conditioner in a low-speed, high-divergence and high-stroke manner. However, the design requirement of the air outlet window is still high. The heat exchange air flow needs to be ensured to be soft air with low speed, high divergence and high stroke after being blown out of the air outlet window. Therefore, a kind of air outlet window and indoor fan, indoor unit and air conditioner with the same are disclosed in Chinese patent CN116412522A. The air outlet window comprises an inner guide ring, air outlet window ribs and an outer guide ring connected in sequence from inside to outside. The air outlet is formed between the plurality of air outlet window ribs. The connecting sleeve of the indoor fan motor assembly is integrally assembled with the inner guide ring at the front end. The fan impeller is rotatably assembled at the rear end of the connecting sleeve and is oppositely arranged with the air outlet window ribs. The spiral direction of the air outlet window ribs is opposite to the spiral direction of the fan impeller. The inner arc surface of the air outlet window ribs is densely covered with convex block air diffusing structures. The air outlet window and the indoor fan, indoor unit and air conditioner with the same disclosed in the application can ensure that the heat exchange air flow becomes soft air with low speed, high divergence and high stroke after being blown out of the air outlet window.

[0004] However, in the above structure, the effect of making the air more uniform is achieved only by the convex blocks on the ribs. The convex blocks are easy to be damaged as protruding structures, and cannot play the role of strengthening the structure strength of the air outlet window or the shell. Therefore, an energy-saving guide-type heat dissipation fan shell that takes into account the air guiding effect and the shell structure needs to be developed. SUMMARY

[0005] To solve the above problems in the prior art, the application provides an energy-saving guide-type heat dissipation fan shell, which has the characteristics of taking into account the air guiding effect and the shell structure.

[0006] The object of the application can be achieved by the following technical solutions.

[0007] An energy-saving guide-type heat dissipation fan shell comprises a frame, the frame is hollowed out to form a fan accommodating cavity, and a plurality of ribs are arranged in the fan accommodating cavity, and the plurality of ribs are respectively integrally connected with the frame.

[0008] Each of the ribs is formed in sequence along the axial direction with an upper section, a middle section and a lower section. The upper section is integrally connected to the shell. The diameter of the upper section is larger than that of the lower section. The diameter of the lower section is larger than that of the middle section. The axial dimension of the upper section is larger than that of the middle section. The axial dimension of the middle section is larger than that of the lower section. The upper section, the middle section and the lower section are smoothly transitioned.

[0009] Each of the ribs is provided with a plurality of air guide rings, and each of the air guide rings is an annular protrusion provided on the surface of the rib.

[0010] As a preferred embodiment of the present invention, the centerlines of several air guide rings on the same rib are parallel to each other, and the angle between the centerline of any air guide ring and the centerline of the rib is 70-85°.

[0011] As a preferred embodiment of the present invention, the distance between two adjacent air guide rings in the middle section is less than the distance between two adjacent air guide rings in the upper and lower sections of the rib.

[0012] As a preferred embodiment of the present invention, the inner wall of the fan housing cavity is provided with an air guide plate, the air guide plate is hinged to the inner wall of the fan housing cavity, the inclination direction of the air guide plate is consistent with the wind direction of the frame, a plurality of air guide plates are provided in correspondence with the ribs, and a plurality of air guide plates are provided on the outside of the ribs.

[0013] As a preferred embodiment of the present invention, it further includes a control module, which is electrically connected to the air guide plate and used to control the air guide plate and the inner wall of the fan housing cavity. The control module is used to read the wind speed in the fan housing cavity. When the wind speed exceeds the standard value, the control module reduces the angle between the air guide plate and the center line of the fan shaft. When the wind speed is lower than the standard value, the control module increases the angle between the air guide plate and the center line of the fan shaft.

[0014] As a preferred embodiment of the present invention, the control module is used to read the wind speed F in the fan housing cavity, and the control module adjusts the angle between the air guide plate and the center line of the fan shaft to A, where A = F0 / F×c, F0 is the pre-input standard wind speed, and c is the pre-input correction coefficient.

[0015] The beneficial effects of this invention are as follows:

[0016] (1) By setting several ribs that are narrower in the middle and thicker at both ends, the diameter of the two ends of the ribs can be increased to improve the structural strength while ensuring that the middle section of the ribs blocks the air duct as little as possible. This balances the smooth air duct while improving the structural strength of the ribs, thereby improving the overall structural strength of the shell and balancing the air guiding effect and the strengthening of the shell structure.

[0017] (2) By setting several annular protrusions of air guide rings, the diameter of the ribs is increased by using the air guide rings, thereby increasing the strength of the rib structure. At the same time, the air duct formed by the protrusions of adjacent air guide rings is used to improve the uniformity of air outlet, and further take into account both the air guiding effect and the strengthening of the shell structure.

[0018] (3) By making the distance between two adjacent air guide rings in the middle section of the rib smaller than the distance between two adjacent air guide rings in the upper and lower sections, the air duct formed by the air guide rings is concentrated in the middle section with the highest air flow density, while the density of the air guide rings is reduced at the fan edge and fan shaft where the air volume is less. This reduces the weight of the ribs and strengthens the structure in the middle section of the thinnest air guide ring with the highest probability of damage.

[0019] (4) By making the axis lines of several air guide rings on the same rib parallel to each other, and the angle between the axis line of any air guide ring and the axis line of the rib is 70-85°, the extension direction of the air duct coincides with the rotation direction of the fan, thereby improving the air duct's role in guiding air and further enhancing the air guiding effect.

[0020] (5) By setting air guide plates, several air guide plates are set one-to-one with the ribs. Several air guide plates are set on the outside of the ribs, so that the air guide plates can shield the ribs from external impacts in some directions on the outside of the ribs. At the same time, the air guide plates can further concentrate the air to the middle section where the air guide ring is set, further taking into account the air guiding effect and the reinforcement of the shell structure.

[0021] (6) By using the control module to read the wind speed in the fan housing, the control module reduces the angle between the air guide plate and the fan shaft centerline when the wind speed exceeds the standard value, increases the angle between the air guide plate and the fan shaft centerline when the wind speed is lower than the standard value, expands the air duct area when the wind speed is large, and reduces the air duct area when the wind speed is small, thus ensuring the air guiding effect. Attached Figure Description

[0022] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0023] Fig. 1 This is a schematic diagram of the structure of the present invention;

[0024] Fig. 2 This is a schematic diagram of the structure of the hidden air guide plate rear rib of the present invention;

[0025] Fig. 3 This is a schematic diagram of the air guide plate of the present invention.

[0026] Explanation of key component symbols:

[0027] In the diagram: 1. Housing; 11. Fan housing cavity; 2. Rib; 21. Upper section; 22. Middle section; 23. Lower section; 24. Air guide ring; 25. Air guide plate. Detailed Implementation

[0028] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0029] Please see Figs. 1-3 An energy-saving flow-guiding type cooling fan housing includes a frame, the frame is hollowed out to form a fan receiving cavity 11, and a plurality of ribs 2 are provided in the fan receiving cavity 11, and the plurality of ribs 2 are integrally connected to the frame.

[0030] The frame is a square frame, and the fan housing 11 is generally truncated cone shape. At this time, the inner wall of the fan housing 11 is converging towards the wind direction.

[0031] Any rib 2 is formed in sequence along the axial direction with an upper section 21, a middle section 22 and a lower section 23. The upper section 21 is integrally connected to the shell 1. The diameter of the upper section 21 is larger than that of the lower section 23, the diameter of the lower section 23 is larger than that of the middle section 22, the axial dimension of the upper section 21 is larger than that of the middle section 22, the axial dimension of the middle section 22 is larger than that of the lower section 23, and the upper section 21, the middle section 22 and the lower section 23 are smoothly transitioned.

[0032] At this point, rib 2 resembles an hourglass shape, with the parts near both ends being thicker and the middle section being thinner;

[0033] By setting several ribs 2 that are narrower in the middle and thicker at both ends, the diameter of the two ends of the ribs 2 can be increased to improve the structural strength while ensuring that the middle section 22 of the ribs 2 obstructs the air duct as little as possible. This balances the unobstructed air duct with the improved structural strength of the ribs 2, thereby improving the overall structural strength of the shell and balancing the air guiding effect with the strengthening of the shell structure.

[0034] A plurality of air guide rings 24 are provided on any rib 2, and any air guide ring 24 is an annular protrusion provided on the surface of the rib 2;

[0035] Since the rib 2 is positioned to ensure that the axis of the rib 2 is perpendicular to the air outlet direction, at this time, any two adjacent air guide rings 24, together with the rib 2, form several grooves in the projection of the rib 2 in the air outlet direction. These grooves play a guiding role and ensure the uniformity of the air outlet.

[0036] At the same time, when rib 2 faces radial shear force, several ring structures play the role of increasing the diameter of rib 2 and strengthening the structure of rib 2. Furthermore, due to the shape of the ring structure itself, the ring structure can enhance the structural strength of rib 2 from various angles.

[0037] By setting several annular protrusions in the air guide rings 24, the diameter of the rib 2 is increased by using the air guide rings 24, thereby increasing the structural strength of the rib 2. At the same time, the air duct formed by the protrusions of adjacent air guide rings 24 is used to improve the uniformity of air outlet, further taking into account both the air guiding effect and the strengthening of the outer shell structure.

[0038] As for the air guide ring 24, since the shape of the fan blade itself is not uniform in the direction of the circle around the fan blade axis, the air distribution when it is vented is not uniformly distributed in the direction of the circle around the fan blade axis. Therefore, the air guide ring 24 used to form the air guide groove also needs to match the air distribution and form a certain angle with the circle around the fan blade axis. For this reason, the axis lines of several air guide rings 24 on the same rib 2 are parallel to each other, and the angle between the axis line of any air guide ring 24 and the axis line of the rib 2 is 70 to 85°.

[0039] Based on the same fan blade shape and rotation speed, the air volume and wind resistance of the air guide ring 24 were measured in the technical schemes with the included angles of 80°, 88° and 65° between the air guide ring 24 and the axis of the rib 2.

[0040] Experimental results show that when the angle between the air guide ring 24 and the axis of the rib 2 exceeds 85° and approaches 90°, and is tangent to the circle around the fan blade axis, the air guide strip forms a significant angle with the actual air outlet distribution, causing resistance to the air outlet. The air outlet volume decreases by 5% to 10% compared to the case where the angle is 80°, showing a significant decrease.

[0041] When the angle between the air guide ring 24 and the axis of the rib 2 is less than 70°, and the angle between the air guide ring and the circle around the axis of the fan blade is too large, the air guide ring forms an obvious angle with the actual air outlet distribution, which causes resistance to the air outlet. The air outlet volume decreases by 8% to 12% compared with the case where the angle is 80°, showing a significant decrease.

[0042] By making the centerlines of several air guide rings 24 on the same rib 2 parallel to each other, and the angle between the centerline of any air guide ring 24 and the centerline of the rib 2 is 70-85°, the extension direction of the air duct coincides with the rotation direction of the fan, thereby improving the air duct's role in guiding air and further enhancing the air guiding effect.

[0043] Because the shape of the fan blades is designed to result in less airflow at the fan edge and fan shaft, the air guides at these locations do not need to be too dense. Too many air guides would increase the weight of the rib 2, reducing structural strength. Therefore, the density of air guides coinciding with the fan edge and fan shaft in the airflow direction needs to be reduced. Similarly, since the airflow density is highest in the middle section 22 of the rib 2, and because the middle section 22 is thinner and has lower structural strength, it relies more on the structural reinforcement effect of the air guide ring 24. Therefore, the air guide density in the middle section 22 needs to be appropriately increased. For this reason, the distance between two adjacent air guide rings 24 in the middle section 22 of the rib 2 is smaller than the distance between two adjacent air guide rings 24 in the upper section 21 and lower section 23 of the rib 2.

[0044] In this embodiment, the density of the air guide strips in the middle section 22 of rib 2 is 2 to 3 times that in the upper section 21 and lower section 23 of rib 2.

[0045] By making the distance between two adjacent air guide rings 24 located in the middle section 22 of rib 2 smaller than the distance between two adjacent air guide rings 24 located in the upper section 21 and lower section 23 of rib 2, the air duct formed by the air guide rings 24 is concentrated in the middle section 22 of rib 2 where the air flow density is the highest. The density of the air guide rings 24 is reduced at the fan edge and fan shaft where the air volume is lower. This reduces the weight of rib 2 and further strengthens the structure in the middle section 22 where the air guide rings 24 are the thinnest and have the highest probability of damage.

[0046] In the above structure, although the fan housing 11 is set as a frustum cone shape and several air guide rings 24 are set to guide the airflow, there is still room for further improvement in the air guiding effect. At the same time, when the fan is set close to an open space, foreign objects in the open space may approach the fan from the air outlet side and hit the rib 2. Since the rib 2 is a strip structure, it has poor resistance to impact from foreign objects. It is necessary to set up a structure to protect some parts of the rib 2 to a certain extent. For this purpose, an air guide plate 25 is set on the inner wall of the fan housing 11. The air guide plate 25 is hinged to the inner wall of the fan housing 11. The tilt direction of the air guide plate 25 is consistent with the wind direction of the frame. Several air guide plates 25 are set one-to-one with the rib 2. Several air guide plates 25 are set on the outside of the rib 2.

[0047] In this embodiment, there are four air guide plates 25 corresponding to the four ribs 2. Each air guide plate 25 is hinged to the inner wall of the fan housing cavity 11 by an electric rotating shaft. The shape of each air guide plate 25 is a rectangular plate with a rounded chamfer at the vertex.

[0048] By setting air guide plates 25, several air guide plates 25 are set one-to-one with ribs 2. Several air guide plates 25 are set on the outside of ribs 2, so that the air guide plates 25 can shield ribs 2 from external impacts in some directions on the outside of ribs 2. At the same time, the air guide plates 25 can further concentrate the air to the middle section 22 of ribs 2 with air guide rings 24, further balancing the air guiding effect and the reinforcement of the outer shell structure.

[0049] Under different circumstances, the air guiding requirements of the air guide plate 25 are different. When the wind speed is high, the air guide plate 25 will block the air outlet channel too much, which will lead to obstruction of the air outlet. At this time, it is necessary to expand the air outlet area and reduce the angle between the air guide plate 25 and the air outlet direction. At the same time, since the probability of foreign objects approaching the fan from the air outlet side and hitting the rib 2 is reduced when the wind speed is high, it is not necessary to rely too much on the protective effect of the air guide plate 25. Conversely, when the wind speed is low, it is necessary to further concentrate the air force to ensure the air outlet effect and narrow the air outlet area. Moreover, when the wind speed is low, the probability of foreign objects approaching the fan from the air outlet side and hitting the rib 2 is increased.

[0050] For this purpose, a control module is also included. The control module is electrically connected to the air guide plate 25 and is used to control the air guide plate 25 and the inner wall of the fan housing cavity 11. The control module is used to read the wind speed in the fan housing cavity 11. When the wind speed exceeds the standard value, the control module reduces the angle between the air guide plate 25 and the center line of the fan shaft. When the wind speed is lower than the standard value, the control module increases the angle between the air guide plate 25 and the center line of the fan shaft.

[0051] Specifically, the control module is used to read the wind speed F in the fan housing 11. The control module adjusts the angle between the air guide plate 25 and the center line of the fan shaft to A, where A = F0 / F × c, F0 is the pre-input standard wind speed, c is the pre-input correction coefficient, 0°≤A≤50°. When the calculation result shows that A is less than 0°, the control module sets A = 0. When the calculation result shows that A is greater than 50°, the control module sets A = 50°.

[0052] According to basic geometry, the smaller the angle between the air guide plate 25 and the air outlet direction or the fan shaft axis, the closer the surface of the air guide plate 25 is to the air outlet direction, the smaller the projection of the air guide plate 25 in the air outlet direction, the wider the air outlet channel, and the worse the concentrating effect. Conversely, the larger the angle between the air guide plate 25 and the air outlet direction and the fan shaft axis, the closer the surface of the air guide plate 25 is to the air outlet direction, the larger the projection of the air guide plate 25 in the air outlet direction, the narrower the air outlet channel, and the better the concentrating effect.

[0053] When the wind speed F is large, it is necessary to reduce the angle between the air guide plate 25 and the air outlet direction and the center line of the fan shaft. At this time, the value of A = F0 / F×c is small. When the angle between the air guide plate 25 and the center line of the fan shaft is adjusted to A, the angle between the air guide plate 25 and the air outlet direction and the center line of the fan shaft decreases as the wind speed increases.

[0054] When the wind speed F is low, the wind force needs to be further concentrated to ensure the air outlet effect. The air duct area needs to be narrowed. When the wind speed is low, the probability of foreign objects approaching the fan from the air outlet side and hitting the rib 2 increases. Therefore, it is necessary to increase the angle between the air guide plate 25 and the air outlet direction and the fan shaft axis.

[0055] By using the control module to read the wind speed in the fan housing 11, the control module increases the angle between the air guide plate 25 and the inner wall of the fan housing 11 when the wind speed exceeds the standard value, and decreases the angle between the air guide plate 25 and the inner wall of the fan housing 11 when the wind speed is lower than the standard value. This expands the air duct area when the wind speed is high and reduces the air duct area when the wind speed is low, thus ensuring the air guiding effect.

[0056] When the density of the air guide ring 24 is small, it means that the air guide ring 24 may not be able to guide the airflow effectively for the current air volume. In this case, the air guide plate 25 is needed to narrow the airflow to assist in guiding the airflow. When the density of the air guide ring 24 is large, excessive narrowing of the airflow may result in an excessively large area of ​​obstruction of the airflow, reducing the airflow effect. Therefore, optionally, the control module can pre-input the density M of the air guide ring 24. The control module can adjust the angle between the air guide plate 25 and the airflow direction and the center line of the fan shaft according to the density of the air guide ring 24, and adjust the angle between the air guide plate 25 and the airflow direction and the center line of the fan shaft to A×X1, where X1=M0 / M×d, d is the pre-input correction coefficient, 1≤X1≤1.1. When the calculation result shows that X is less than 1 or greater than 1.2, the control module takes X=1 or X=1.1.

[0057] When the density of the air guide ring 24 is low, the air guide plate 25 needs to be intervened to assist in air guidance, increasing the angle between the air guide plate 25 and the center line of the fan shaft, thereby improving the auxiliary effect of the air guide plate 25 in air guidance. At this time, the value of X1=M0 / M×d is relatively large. When the control module adjusts the angle between the air guide plate 25 and the air outlet direction and the center line of the fan shaft to A×X1, it completes the upward correction of the angle between the air guide plate 25 and the center line of the fan shaft when the density of the air guide ring 24 is low, thereby concentrating the air duct to assist in air guidance.

[0058] When the density of the air guide ring 24 is relatively high, there is no need to excessively correct the angle upwards. At this time, the value of X1 is close to 1.1. By limiting the upper limit of X1 to 1.1, the limitation on correcting the angle of the air guide plate 25 according to the density of the air guide ring 24 is completed, thus avoiding the situation of excessive obstruction of the air duct area.

[0059] By linking the angle between the air guide plate 25 and the fan shaft centerline with the density of the air guide ring 24, the control module can adjust the angle between the air guide plate 25 and the fan shaft centerline according to the housing structure, thereby improving the air guiding effect when the density of the air guide ring 24 is low and the air guide plate 25 needs to intervene to assist in air guiding.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An energy-saving, flow-guided, heat-dissipating fan housing, characterized by: The frame is hollowed to form a fan accommodating cavity, and a plurality of ribs are arranged in the fan accommodating cavity and are integrally connected with the frame; Any of the ribs is sequentially formed with an upper section, a middle section and a lower section in the axial direction, the upper section is integrally connected with the shell, the diameter of the upper section is greater than that of the lower section, the diameter of the lower section is greater than that of the middle section, the axial dimension of the upper section is greater than that of the middle section, the axial dimension of the middle section is greater than that of the lower section, and the upper section, the middle section and the lower section are smoothly transitioned; Any of the ribs is provided with a plurality of air guide rings, and any of the air guide rings is an annular protrusion arranged on the surface of the rib; The axial center lines of the air guide rings on the same rib are parallel to each other, and the included angle between the axial center line of any air guide ring and the axial center line of the rib is 70-85°; The distance between the adjacent two air guide rings arranged on the middle section is less than the distance between the adjacent two air guide rings arranged on the upper section and the lower section of the rib; The inner wall of the fan accommodating cavity is provided with air guide plates, the air guide plates are hinged to the inner wall of the fan accommodating cavity, the inclination direction of the air guide plates is consistent with the wind direction of the frame, a plurality of air guide plates are arranged in one-to-one correspondence with the ribs, and a plurality of air guide plates are arranged outside the ribs.

2. The energy-saving, flow-guiding heat-dissipation fan housing according to claim 1, characterized in that: The control module is electrically connected with the air guide plates and is used for controlling the air guide plates and the inner wall of the fan accommodating cavity, the control module is used for reading the wind speed in the fan accommodating cavity, the control module reduces the included angle between the air guide plates and the axial center line of the fan shaft when the wind speed exceeds a standard value, and the control module increases the included angle between the air guide plates and the axial center line of the fan shaft when the wind speed is lower than the standard value.

3. The energy-saving, flow-guiding heat-dissipating fan housing according to claim 2, characterized in that: The control module is used for reading the wind speed F in the fan accommodating cavity, and the control module adjusts the included angle between the air guide plates and the axial center line of the fan shaft to A, wherein A=F0 / F×c, F0 is a standard wind speed input in advance, and c is a correction coefficient input in advance.

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