CN112310593B - Vehicle-mounted communication antenna - Google Patents
Vehicle-mounted communication antenna Download PDFInfo
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- CN112310593B CN112310593B CN202011542747.1A CN202011542747A CN112310593B CN 112310593 B CN112310593 B CN 112310593B CN 202011542747 A CN202011542747 A CN 202011542747A CN 112310593 B CN112310593 B CN 112310593B
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- heat dissipation
- air
- air inlet
- fan
- air duct
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/02—Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
- H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
Abstract
The embodiment of the invention provides a vehicle-mounted communication antenna, which relates to the technical field of antennas and comprises an antenna body, a heat dissipation shell and a heat dissipation fan, wherein the antenna body is arranged on the heat dissipation shell, a heat dissipation cavity is arranged in the heat dissipation shell and positioned on one side of the antenna body, a first air inlet communicated with the heat dissipation cavity and a first air outlet communicated with the heat dissipation cavity are respectively arranged at two ends of the heat dissipation shell along the traveling direction, the heat dissipation fan is arranged at the first air inlet, and an acute angle is formed between the air inlet direction of the heat dissipation fan and the traveling direction. The working environment at the air inlet of the fan is improved by arranging the air inlet direction of the cooling fan to be an acute angle with the running direction, and the momentum loss is correspondingly reduced. Meanwhile, the installation mode can make full use of incoming flow wind speed and wind pressure, and a certain inclination angle reduces the damage of external fluid to the fan, further reduces the influence of external wind speed on air intake, and improves the overall heat dissipation effect of equipment during movement.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a vehicle-mounted communication antenna.
Background
At present, the vehicle-mounted satellite communication antenna is usually arranged on the top of an automobile due to performance requirements. Because the antenna surface needs to face the air, and the heat dissipation device needs to be arranged at the bottom of the equipment, the heat dissipation fan is also arranged at a position close to the vehicle top. If the axial flow fan is adopted for radiating heat of equipment, the air inlet and outlet direction of the fan is perpendicular to the moving direction of the automobile, the natural wind speed is ignored, and high-Reynolds-number fluid brought by the movement of the automobile can greatly influence the performance of the axial flow fan. Firstly, according to the bernoulli principle, the fluid at the air inlet of the fan is in a high-speed low-pressure state when the fluid speed is increased along with the reduction of the fluid pressure, and the static pressure of the fan is constant, so that the air suction amount is reduced, the fan idles, and the mechanical efficiency of the fan is reduced; secondly, the axial flow fan applies transverse pressure to external fluid, the fluid close to a boundary layer is low in speed and large in offset, the fluid far away from the boundary layer is high in speed and small in offset, flow separation can be caused, momentum loss is caused, and the wind pressure and the wind volume of the fan are reduced; thirdly, fluid of the self heat dissipation fan is removed from the air duct, and high-speed airflow entering from the outside also exists, so that the operation effect of the fan is influenced. Therefore, the existing vehicle-mounted satellite antenna is difficult to meet the heat dissipation requirement by abutting against the fan when the automobile moves.
Disclosure of Invention
The invention aims to provide a vehicle-mounted communication antenna which has high air inlet efficiency, small influence of external wind speed, small momentum loss and small influence of the external wind speed, and ensures the heat dissipation effect.
Embodiments of the invention may be implemented as follows:
in a first aspect, the invention provides a vehicle-mounted communication antenna, which includes an antenna body, a heat dissipation casing and a heat dissipation fan, wherein the antenna body is arranged on the heat dissipation casing, the heat dissipation casing is internally provided with a heat dissipation cavity located at one side of the antenna body, two ends of the heat dissipation casing along a driving direction are respectively provided with a first air inlet communicated with the heat dissipation cavity and a first air outlet communicated with the heat dissipation cavity, the heat dissipation fan is arranged at the first air inlet, and an acute angle is formed between an air inlet direction of the heat dissipation fan and the driving direction.
In an alternative embodiment, an angle between an air inlet direction of the heat dissipation fan and the driving direction is 40 °.
In an optional embodiment, an air inlet grille is arranged on the first air inlet, and the air inlet grille is arranged at the air inlet side of the heat dissipation fan at intervals.
In an optional embodiment, a protective net is further disposed on the surface of the cooling fan, and the protective net is attached to the air inlet side of the cooling fan and spaced from the air inlet grille.
In an optional implementation manner, a heat dissipation flow channel partition plate is disposed in the heat dissipation cavity, and divides the heat dissipation cavity into a first air duct and a second air duct, the first air duct is respectively communicated with the first air inlet and the first air outlet, a second air inlet and a second air outlet are further respectively disposed at two ends of the heat dissipation housing along the traveling direction, and the second air duct is respectively communicated with the second air inlet and the second air outlet.
In an optional implementation manner, the heat dissipation flow channel partition plate is disposed in the middle of the heat dissipation cavity, the number of the first air ducts, the number of the first air inlets, and the number of the first air outlets are two, the number of the first air ducts is two, the number of the first air inlets is two, the number of the first air outlets is two, the number of the first air inlets is two, and the width of the second air inlets is less than the width of the first air inlets.
In an optional embodiment, the heat dissipation casing includes mounting panel, wind channel apron and side bounding wall, the antenna body sets up on the mounting panel, the wind channel apron with the parallel interval of mounting panel sets up, the side bounding wall sets up the both sides of mounting panel, and with the wind channel cover connection, the mounting panel the wind channel apron and the side bounding wall encloses and establishes the formation the heat dissipation cavity, heat dissipation flow channel baffle respectively with the mounting panel with the wind channel cover connection.
In an optional embodiment, a first heat dissipation tooth is disposed in the first air duct, the first heat dissipation tooth is connected to the mounting plate and the air duct cover plate, and divides the first air duct into a plurality of first heat dissipation channels, and each of the first heat dissipation channels is communicated with the first air inlet and the first air outlet; and second heat dissipation teeth are arranged in the second air duct, are respectively connected with the mounting plate and the air duct cover plate and divide the second air duct into a plurality of second heat dissipation flow channels, and each second heat dissipation flow channel is respectively communicated with the second air inlet and the second air outlet.
In an optional implementation manner, each first heat dissipation tooth includes a first straight line segment, a bent segment and a second straight line segment, the first straight line segment and the second straight line segment are parallel to each other and parallel to the driving direction, the bent segment is respectively connected with the first straight line segment and the second straight line segment and is obliquely arranged from the first straight line segment toward the direction of closing the second air duct, and the distance between two adjacent bent segments is greater than the distance between two adjacent first straight line segments.
In an optional embodiment, the heat dissipation flow channel partition plate is provided with a plurality of flow guide holes, and each flow guide hole is communicated with the first air duct and the second air duct.
The beneficial effects of the embodiment of the invention include, for example:
the invention provides a vehicle-mounted communication antenna, wherein an antenna body is arranged on a radiating shell, a radiating cavity is arranged on one side of the antenna body in the radiating shell, a first air inlet communicated with the radiating cavity and a first air outlet communicated with the radiating cavity are respectively arranged at two ends of the radiating shell along a driving direction, a radiating fan is arranged at the first air inlet, and an acute angle is formed between the air inlet direction of the radiating fan and the driving direction. The air inlet direction of the cooling fan and the driving direction are arranged to form an acute angle, so that the working environment at the air inlet of the fan is improved, and the momentum loss is correspondingly reduced along with the reduction of the inclination angle. Meanwhile, the fan is removed from sucking air, the installation mode can fully utilize incoming flow air speed and air pressure, the damage of external fluid to the fan is reduced by a certain inclination angle, the influence of the external air speed on the air intake is further reduced, and the overall heat dissipation effect of the equipment during movement is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a vehicle-mounted center-pass antenna provided by the present invention at a first viewing angle;
fig. 2 is a schematic structural diagram of the vehicle-mounted center-pass antenna provided by the present invention at a second viewing angle;
FIG. 3 is a schematic partial cross-sectional view taken along line A-A in FIG. 2;
FIG. 4 is a schematic structural diagram of a vehicle-mounted center-pass antenna provided by the present invention at a third viewing angle;
fig. 5 is an internal structural schematic diagram of the vehicle-mounted center-pass antenna provided by the invention at a fourth viewing angle;
FIG. 6 is a schematic diagram of a partial internal structure of the vehicle-mounted center-pass antenna provided by the present invention;
fig. 7 is a schematic internal structure diagram of the vehicle-mounted center antenna provided by the invention at a third viewing angle.
Icon: 100-a vehicle communication antenna; 110-an antenna body; 130-a heat dissipating housing; 131-a mounting plate; 133-duct cover plate; 135-side coaming; 150-a heat dissipation fan; 151-an intake grill; 170-heat dissipation cavity; 171-a first air inlet; 172-a second air inlet; 173-first air outlet; 174-a second outlet; 175-protective net; 177-a heat dissipation flow channel partition plate; 1771-first air duct; 1773-second air duct; 1775-guiding holes; 178-first heat dissipating teeth; 1781-first straight line segment; 1783-bending section; 1785-second straight line segment; 179-second heat dissipating teeth.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
As disclosed in the background art, in the conventional vehicle-mounted satellite antenna, a cooling fan is generally used for forced cooling, and the air inlet and outlet direction of the fan is perpendicular to the moving direction of the vehicle, so as to ensure that air-cooled heat dissipation can be realized in a moving state, but in the case of high-speed movement of the vehicle, fluid with a high reynolds number caused by the movement of the vehicle has a great influence on the performance of the axial flow fan. Firstly, according to the bernoulli principle, the fluid at the air inlet of the fan is in a high-speed low-pressure state when the fluid speed is increased along with the reduction of the fluid pressure, and the static pressure of the fan is constant, so that the air suction amount is reduced, the fan idles, and the mechanical efficiency of the fan is reduced; secondly, the axial flow fan applies transverse pressure to external fluid, the fluid close to a boundary layer is low in speed and large in offset, the fluid far away from the boundary layer is high in speed and small in offset, flow separation can be caused, momentum loss is caused, and the wind pressure and the wind volume of the fan are reduced; thirdly, fluid of the self heat dissipation fan is removed from the air duct, and high-speed airflow entering from the outside also exists, so that the operation effect of the fan is influenced. Therefore, the existing vehicle-mounted satellite antenna is difficult to meet the heat dissipation requirement by abutting against the fan when the automobile moves.
The difficulty of forced air cooling heat dissipation of vehicle-mounted equipment is that the speed range of the automobile from rest to rapid running is large, and a fan is difficult to adapt to the rapidly changing environmental wind speed; in addition, the shapes of the roofs are different, the motion states of the fluid are various, and the design of a fan and a heat dissipation scheme is difficult to be suitable for all automobiles.
In order to solve the problems, a method of placing the axial flow fan in front of the equipment can be adopted, namely, the air inlet and outlet direction is consistent with the automobile running direction, and the method is equivalent to serially connecting an axial flow fan with uncertain air pressure and air speed behind the original axial flow fan. The scheme has the advantages that the wind speed caused by the running of the automobile can be utilized to the maximum extent, and the wind pressure and the heat dissipation capacity of the system are increased. However, it has the following disadvantages: the axial flow fan is opposite to the incoming flow direction, so that the pressure of fan blades is increased, the pressure is changed, the fatigue damage is easy to occur, besides, the influence of sand and dust is also caused when an automobile runs, foreign matters such as mosquitoes, rainwater and the like are accompanied, the erosion degree of the windward side and the like is maximum, the reliability of the fan is greatly reduced, the protection and maintenance difficulty is improved, the vibration of the axial flow fan during working is mainly in the centrifugal direction, the vibration in the wind direction is mainly caused by airflow pulsation in the incoming flow direction, the resonance is easy to cause, and the noise of the fan is increased.
In order to completely solve the above problems in the prior art, the present invention discloses a vehicle communication antenna, and it should be noted that features in the embodiments of the present invention may be combined with each other without conflict.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Referring to fig. 1 to 3 (the straight arrows in fig. 1 and 3 indicate the driving direction), the present embodiment provides a vehicle-mounted communication antenna 100, which can fully utilize the incoming wind speed and wind pressure, and a certain inclination angle reduces the damage and pressure of the external fluid to the fan, further reduces the influence of the external wind speed on the incoming wind, and improves the overall heat dissipation effect when the device moves. Meanwhile, the windward side is low in erosion degree, good in reliability, low in protection and maintenance difficulty and low in noise.
The vehicle-mounted communication antenna 100 provided by the embodiment comprises an antenna body 110, a heat dissipation casing 130 and a heat dissipation fan 150, wherein the antenna body 110 is arranged on the heat dissipation casing 130, a heat dissipation cavity 170 located on one side of the antenna body 110 is arranged in the heat dissipation casing 130, a first air inlet 171 communicated with the heat dissipation cavity 170 and a first air outlet 173 communicated with the heat dissipation cavity 170 are respectively arranged at two ends of the heat dissipation casing 130 along the traveling direction, the heat dissipation fan 150 is arranged at the first air inlet 171, and an acute included angle is formed between the air inlet direction of the heat dissipation fan 150 and the traveling direction.
In the present embodiment, the vehicle-mounted communication antenna 100 is disposed on the top of the vehicle, and particularly, the top of the vehicle may be provided with a mounting bracket, wherein the bottom of the heat dissipation housing 130 is disposed on the mounting bracket, and the mounting direction of the heat dissipation housing 130 is along the driving direction of the vehicle, so that the external air flow can directly enter the heat dissipation cavity 170 from the first air inlet 171 and be discharged from the first air outlet 173. Of course, the vehicle-mounted communication antenna 100 may be disposed at other positions of the automobile, such as a side portion or a front portion, and the vehicle-mounted communication antenna 100 may be disposed on other types of vehicles, such as a train, or a motorcycle, and is not limited thereto.
It should be noted that the driving direction in this embodiment refers to a direction in which the vehicle moves forward, that is, a direction in which the vehicle normally drives, because the vehicle-mounted communication antenna 100 is disposed on the top of the vehicle and is relatively fixed to the vehicle, and the mounting surface of the heat dissipation housing 130 is parallel to the horizontal plane, the vehicle-mounted communication antenna 100 and the driving direction of the vehicle are always kept opposite to each other during driving of the vehicle, that is, during driving of the vehicle, external air always enters the heat dissipation cavity 170 through the first air inlet 171 and is exhausted through the first air outlet 173.
In the present embodiment, the angle between the air intake direction of the heat dissipation fan 150 and the driving direction is 40 °. Specifically, the heat dissipation housing 130 has opposite upper and lower side surfaces, both of which are parallel to a horizontal plane when actually installed, and the first air inlet 171 and the first air outlet 173 on the heat dissipation housing 130 are disposed at front and rear ends in the traveling direction such that the heat dissipation cavity 170 penetrates the first air inlet 171 and the first air outlet 173 in the traveling direction. Meanwhile, the heat dissipation fan 150 is installed obliquely, and an included angle between an air inlet direction of the heat dissipation fan 150 and a driving direction is 40 °, that is, an included angle between an installation direction of the heat dissipation fan 150 and a horizontal plane where the lower side surface is located is 40 °. Through the limited to radiator fan 150 installation angle for radiator fan 150's air inlet direction is 40 inclinations with the incoming flow, and this kind of mounting means can improve the operational environment of axial fan air intake, and fan business turn over wind direction and incoming flow direction are different, and be 40 contained angles, so along with fluid momentum loss when destroying original flow when inhaling wind, when fan business turn over wind direction perpendicular to incoming flow direction, momentum loss is the biggest, and when the wind speed is great, can lead to induced drafting inhomogeneous or even the air suction phenomenon. As the inclination angle becomes smaller, the momentum loss response is also reduced, and the size of the inclination angle is related to the speed vector relation of the wind speed of the fan and the wind speed of the external fluid. According to the wind speed of a common fan and the conventional running speed range of an automobile, when the inclination angles of the air inlet and outlet directions and the incoming flow direction of the fan are 40 degrees, the axial flow fan has the most stable air suction and the least momentum loss; and secondly, the fan is removed from sucking air, the installation mode can make full use of incoming flow speed and wind pressure, and a certain inclination angle reduces the damage of external fluid to the fan, further reduces the damage of external environment to the fan, and prolongs the service life of the fan. Besides, through optimizing the incoming flow direction, the airflow pulsation in the incoming flow direction is reduced, the occurrence of resonance phenomenon is reduced, and the noise of the fan is reduced.
It should be noted that, in the present embodiment, the heat dissipation fan 150 is an axial fan, the air inlet direction of the heat dissipation fan 150 refers to the axial direction of the heat dissipation fan 150, and an included angle between the axial direction of the heat dissipation fan 150 and a horizontal plane where the lower side surface is located is 40 ° in the present embodiment, which can prevent the external wind speed from affecting the air inlet flow field to the maximum extent, and avoid the momentum loss and avoid the excessive pressure caused by the direct stress on the fan blades of the heat dissipation fan 150.
In this embodiment, the first air inlet 171 is provided with an air inlet grill 151, and the air inlet grill 151 is spaced apart from the air inlet side of the radiator fan 150. Specifically, a transition cavity is formed between the air inlet grille 151 and the heat dissipation fan 150, the air inlet grille 151 is arranged on the front side of the transition cavity, and meanwhile, the lower portion of the transition cavity is hollowed out and communicated with the outside, so that external air can enter from the lower portion of the transition cavity in a supplementing mode, and the air inlet volume of the heat dissipation fan 150 is increased. Meanwhile, by arranging the air inlet grille 151, external air can enter the transition cavity from the air inlet grille 151, the air inlet amount of the cooling fan 150 is guaranteed, the air inlet grille can block external bulk impurities such as branches, blades or stones, the protection effect is achieved, the damage of the external environment to the cooling fan 150 is further reduced, and the service life of the fan is prolonged.
In this embodiment, be formed with a plurality of bar fresh air inlets on the air intake grille 151, every bar fresh air inlet all sets up along the horizontal direction, realize the air inlet through a plurality of bar fresh air inlets, and the grid then plays and blocks the air current, the effect of air current is disturbed, make the air velocity that enters into the transition cavity by air intake grille 151 descend, and receive the disturbance, its pressure to radiator fan 150 direct application of greatly reduced, and the velocity of flow is more stable, make radiator fan 150's pressurized more tend to stably, the fatigue degree under the long-time use has been slowed down.
In this embodiment, a protective mesh 175 is further disposed on the surface of the heat dissipation fan 150, and the protective mesh 175 is attached to the air inlet side of the heat dissipation fan 150 and spaced from the air inlet grille 151. Specifically, the protective net 175 is provided on the air inlet side of the heat dissipation fan 150, so as to achieve a further protective effect, prevent external impurities from entering the heat dissipation fan 150, and enhance the structure of the heat dissipation fan 150, so that the heat dissipation fan 150 is more stably installed.
Referring to fig. 4 to 7 (fig. 6 omits the first heat dissipation teeth 178 and the second heat dissipation teeth 179), a heat dissipation flow channel partition 177 is disposed in the heat dissipation cavity 170, and divides the heat dissipation cavity 170 into a first air duct 1771 and a second air duct 1773, the first air duct 1771 is respectively communicated with the first air outlet 173 of the first air inlet 171, the second air inlet 172 and the second air outlet 174 are respectively disposed at two ends of the heat dissipation housing 130 along the driving direction, and the second air duct 1773 is respectively communicated with the second air inlet 172 and the second air outlet 174.
In this embodiment, the heat dissipation flow channel partition 177 is disposed in the middle of the heat dissipation cavity 170, two first air channels 1771, two first air inlets 171 and two first air outlets 173 are disposed, two first air channels 1771 are disposed on two sides of the second air channel 1773, two first air inlets 171 are disposed on two sides of the second air inlet 172, two first air outlets 173 are disposed on two sides of the second air outlet 174, and the width of the second air inlet 172 is smaller than the width of the first air inlet 171. Specifically, the second air duct 1773 is gathered and narrowed towards the center, so that the width of the second air inlet 172 is smaller than that of the first air inlet 171, wherein a fan structure is not arranged at the second air inlet 172, when the automobile runs, external high-speed airflow enters the second air duct from the second air inlet 172, and due to the narrowing of the second air duct 1773, the flow velocity of the air in the second air duct 1773 can be further enhanced, heat in the second air duct 1773 can be rapidly taken out, and the heat exchange efficiency is improved.
It should be noted that in this embodiment, the first air duct 1771 is disposed closely to the second air duct 1773, and the two first air ducts 1771 are disposed at two sides of the second air duct 1773, because the rear portion of the second air duct 1773 is gathered towards the central position, the two first air ducts 1771 are also gathered towards the central position at the rear portion, so as to form a structure with a large air inlet area and a small air outlet area.
In this embodiment, the heat dissipation housing 130 includes a mounting plate 131, an air duct cover plate 133 and a side wall plate 135, the antenna body 110 is disposed on the mounting plate 131, the air duct cover plate 133 and the mounting plate 131 are disposed at an interval in parallel, the side wall plates 135 are disposed on two sides of the mounting plate 131 and connected to the air duct cover plate 133, the mounting plate 131, the air duct cover plate 133 and the side wall plates 135 enclose a heat dissipation cavity 170, and the heat dissipation flow channel partition 177 is respectively connected to the mounting plate 131 and the air duct cover plate 133. Specifically, the mounting plate 131, the air duct cover plate 133 and the side enclosing plate 135 are all made of aluminum alloy, the heat transfer effect is good, the antenna body 110 is attached to the upper surface of the mounting plate 131, and heat generated by the antenna body is transferred to the heat dissipation cavity 170 through the mounting plate 131 and then transferred to the outside after heat exchange. Two side enclosing plates 135 are arranged on two sides of the mounting plate 131, and the two side enclosing plates 135 are folded towards the center position at the rear part, so that the two side enclosing plates 135 are arranged along the outer edge positions of the two first air ducts 1771, and thus the two first air ducts 1771 are formed by combining the heat dissipation flow channel partition plate 177 at the middle part.
In this embodiment, a first heat dissipation tooth 178 is disposed in the first air duct 1771, the first heat dissipation tooth 178 is respectively connected to the mounting plate 131 and the air duct cover plate 133, and divides the first air duct 1771 into a plurality of first heat dissipation flow channels, and each of the first heat dissipation flow channels is respectively communicated with the first air inlet 171 and the first air outlet 173; a second heat dissipation tooth 179 is disposed in the second air duct 1773, the second heat dissipation tooth 179 is respectively connected to the mounting plate 131 and the air duct cover plate 133, and divides the second air duct 1773 into a plurality of second heat dissipation channels, and each of the second heat dissipation channels is respectively communicated with the second air inlet 172 and the second air outlet 174. Specifically, the first heat dissipation teeth 178 and the second heat dissipation teeth 179 are integrally disposed on the mounting plate 131, and the mounting direction of the first heat dissipation teeth 178 is the same as the direction of the first air duct 1771.
In this embodiment, each first heat dissipation tooth 178 includes a first straight line segment 1781, a bent segment 1783 and a second straight line segment 1785, the first straight line segment 1781 and the second straight line segment 1785 are parallel to each other and parallel to the driving direction, the bent segment 1783 is connected to the first straight line segment 1781 and the second straight line segment 1785 respectively, the first straight line segment 1781 is inclined toward the direction of closing the second air duct 1773, and the distance between two adjacent bent segments 1783 is greater than the distance between two adjacent first straight line segments 1781. Specifically, first straight line segment 1781, the section of bending 1783 and the integrative setting of second straight line segment 1785, and first straight line segment 1781 is close to first air intake 171, second straight line segment 1785 is close to first air outlet 173, through the effect of turning to of the section of bending 1783, the installation trend of having guaranteed first heat dissipation tooth 178 is the same with the trend of first wind channel 1771, simultaneously in the position of bending, distance between two sections of bending 1783 increases, make the width increase of first heat dissipation runner in the department that turns to, momentum loss when can reduce the gas direction and change, guarantee that gas flows out first air outlet 173 fast.
In this embodiment, the heat dissipation flow channel partition 177 is provided with a plurality of flow guiding holes 1775, and each flow guiding hole 1775 is communicated with the first air duct 1771 and the second air duct 1773. Specifically, the diversion hole 1775 is disposed at a turning bending position of the heat dissipation flow channel partition 177, and by disposing the diversion hole 1775, when the automobile runs at a high speed, high-speed air entering the second air duct 1773 from the second air inlet 172 can flow into the first air duct 1771 through the diversion hole 1775, so as to achieve diversion, and thus, the air in the first air duct 1771 is driven to flow rapidly. Meanwhile, when the automobile is in a stationary state, the heat dissipation fan 150 is forced to cool, and the air in the first air duct 1771 can enter the second air duct 1773 through the diversion hole 1775, so that the air in the second air duct 1773 is driven to flow, and heat exchange in the second air duct 1773 is realized. Through the diversion hole 1775, the first air duct 1771 and the second air duct 1773 can be communicated, and the heat exchange fluid can be guided to the whole heat dissipation surface, so that the heat exchange effect is better, and the heat exchange is more uniform.
In this embodiment, a plurality of flow guiding holes are also formed in the bending section 1783 of each first heat dissipation tooth 178, so that the plurality of first heat dissipation flow channels can be communicated with each other, and the air pressure is further balanced.
In this embodiment, during actual heat dissipation, when the device is stationary, the convective heat transfer air mainly comes from the left and right axial fans, and the air is blown out from the two heat dissipation fans 150 at both sides, and is converged toward the middle part by the first heat dissipation teeth 178, and then flows out of the device through the straight heat dissipation teeth. The flow channel at the position where the gas direction changes is wider, the momentum loss caused by the gas direction change can be reduced, the flow channel at the position of the straight radiating teeth is narrowed, the flow speed can be effectively increased, and heat can be rapidly taken out of the equipment. The guiding holes 1775 can guide the air into the front end of the second air passage 1773, and when the second air passage 1773 is still, less air can exchange heat at the front end. The second air duct 1773 and the first air duct 1771 can guide the gas participating in heat exchange to the whole heat dissipation surface, the gas temperature of the front half part of the equipment is low, but the gas participating in heat exchange in the middle part is less; the gas temperature at the back of the equipment is higher, and the temperature of the whole equipment is more uniform.
When the apparatus is in motion, the external air also participates in heat exchange in addition to the operation of the cooling fan 150. For the heat radiation fans 150 on both sides, the whole wind pressure and wind quantity of the external air are increased, and the whole flow of the heat radiation system is improved; the other part of the air comes from the external high-speed air sucked from the second air inlet 172, and after the air enters the second heat dissipation teeth 179, a part of the air is gathered towards the middle part and flows out of the equipment through the rear heat dissipation teeth; the other part of the air enters the first heat dissipation teeth 178 with smaller wind pressure through the diversion holes 1775, so that the overall flow of the heat dissipation device is increased.
The invention provides a vehicle-mounted communication antenna 100, which improves the air inlet efficiency of an axial flow fan on vehicle-mounted equipment during high-speed movement along with a vehicle by optimizing the installation mode and the heat dissipation tooth structure of the fan, sets the air speed of an air outlet of the fan to be 10m/s and the driving speed range of the vehicle to be 40-80m/s according to CFD simulation, and improves the integral heat dissipation effect of a heat dissipation system during the movement of the equipment because the flow field of an air inlet of the fan is minimally influenced by the external air speed and the pressure intensity of fluid in a heat dissipation cavity 170 is maximal when the inclination angle of the fan is 40 degrees. Specifically, the antenna body 110 is disposed on the heat dissipation housing 130, the heat dissipation housing 130 has a heat dissipation cavity 170 located at one side of the antenna body 110, two ends of the heat dissipation housing 130 along the traveling direction are respectively provided with a first air inlet 171 communicated with the heat dissipation cavity 170 and a first air outlet 173 communicated with the heat dissipation cavity 170, the heat dissipation fan 150 is disposed at the first air inlet 171, and an acute angle is formed between the air inlet direction of the heat dissipation fan 150 and the traveling direction. The working environment at the air inlet of the fan is improved by setting the air inlet direction of the cooling fan 150 to be an acute angle with the driving direction, and the momentum loss is correspondingly reduced along with the reduction of the inclination angle. Meanwhile, the fan is removed from sucking air, the installation mode can fully utilize incoming flow air speed and air pressure, the damage of external fluid to the fan is reduced by a certain inclination angle, the influence of the external air speed on the air intake is further reduced, and the overall heat dissipation effect of the equipment during movement is improved.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A vehicle-mounted communication antenna is characterized by comprising an antenna body, a heat dissipation shell and a heat dissipation fan, the antenna body is arranged on the heat dissipation shell, a heat dissipation cavity is arranged in the heat dissipation shell and is positioned at one side of the antenna body, a heat dissipation flow channel clapboard is arranged in the heat dissipation cavity, the heat dissipation cavity is divided into a first air duct and a second air duct, a first air inlet and a first air outlet are respectively arranged at two ends of the heat dissipation shell along the driving direction, the first air duct is respectively communicated with the first air inlet and the first air outlet, the heat radiation fan is arranged at the first air inlet, and the air inlet direction of the heat radiation fan and the driving direction are arranged at an acute angle, the two ends of the heat radiation shell along the driving direction are respectively provided with a second air inlet and a second air outlet, and the second air channel is respectively communicated with the second air inlet and the second air outlet.
2. The vehicle-mounted communication antenna according to claim 1, wherein an angle between an air inlet direction of the heat dissipation fan and the driving direction is 40 °.
3. The vehicle-mounted communication antenna as recited in claim 1, wherein an air inlet grille is arranged on the first air inlet, and the air inlet grille is arranged on the air inlet side of the heat dissipation fan at intervals.
4. The vehicle-mounted communication antenna according to claim 3, wherein a protective net is further arranged on the surface of the cooling fan, and the protective net is attached to the air inlet side of the cooling fan and is arranged at a distance from the air inlet grille.
5. The vehicle-mounted communication antenna according to claim 1, wherein the heat dissipation flow channel partition is disposed in a middle portion of the heat dissipation cavity, the number of the first air ducts, the number of the first air inlets, and the number of the first air outlets are two, the two first air ducts are disposed on two sides of the second air duct, the two first air inlets are disposed on two sides of the second air inlet, the two first air outlets are disposed on two sides of the second air outlet, and a width of the second air inlet is smaller than a width of the first air inlet.
6. The vehicle-mounted communication antenna according to claim 5, wherein the heat dissipation housing comprises a mounting plate, an air duct cover plate and side surrounding plates, the antenna body is disposed on the mounting plate, the air duct cover plate is spaced from the mounting plate in parallel, the side surrounding plates are disposed on two sides of the mounting plate and connected to the air duct cover plate, the mounting plate, the air duct cover plate and the side surrounding plates surround to form the heat dissipation cavity, and the heat dissipation flow channel partition plate is connected to the mounting plate and the air duct cover plate respectively.
7. The vehicle-mounted communication antenna according to claim 6, wherein a first heat dissipation tooth is disposed in the first air duct, the first heat dissipation tooth is respectively connected to the mounting plate and the air duct cover plate, and divides the first air duct into a plurality of first heat dissipation flow channels, and each of the first heat dissipation flow channels is respectively communicated with the first air inlet and the first air outlet; and second heat dissipation teeth are arranged in the second air duct, are respectively connected with the mounting plate and the air duct cover plate and divide the second air duct into a plurality of second heat dissipation flow channels, and each second heat dissipation flow channel is respectively communicated with the second air inlet and the second air outlet.
8. The vehicle-mounted communication antenna according to claim 7, wherein each of the first heat dissipation teeth includes a first straight line segment, a bent segment and a second straight line segment, the first straight line segment and the second straight line segment are parallel to each other and parallel to the driving direction, the bent segment is respectively connected with the first straight line segment and the second straight line segment and is obliquely arranged from the first straight line segment toward the direction of closing the second air duct, and the distance between two adjacent bent segments is greater than the distance between two adjacent first straight line segments.
9. The vehicle-mounted communication antenna as recited in claim 1, wherein the heat dissipation flow channel partition has a plurality of flow guide holes, each of the flow guide holes being in communication with the first air channel and the second air channel.
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| CN202011542747.1A CN112310593B (en) | 2020-12-24 | 2020-12-24 | Vehicle-mounted communication antenna |
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| CN202011542747.1A CN112310593B (en) | 2020-12-24 | 2020-12-24 | Vehicle-mounted communication antenna |
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| CN112310593B true CN112310593B (en) | 2021-03-23 |
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| CN114222472B (en) * | 2021-11-30 | 2023-07-21 | 远峰科技股份有限公司 | Vehicle-mounted multimedia host heat dissipation structure and vehicle-mounted multimedia host |
| CN117175179A (en) * | 2022-05-27 | 2023-12-05 | 成都天锐星通科技有限公司 | Communication-in-motion antenna and carrier |
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