CN112038747A - Antenna for communication in motion - Google Patents
Antenna for communication in motion Download PDFInfo
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- CN112038747A CN112038747A CN202011141998.9A CN202011141998A CN112038747A CN 112038747 A CN112038747 A CN 112038747A CN 202011141998 A CN202011141998 A CN 202011141998A CN 112038747 A CN112038747 A CN 112038747A
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- heat dissipation
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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
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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Abstract
The embodiment of the invention provides a communication-in-motion antenna, which relates to the technical field of antennas and comprises an antenna body, an arc-shaped cold plate, a top plate and a cold plate sealing cover, wherein the antenna body is arranged on the upper side surface of the arc-shaped cold plate, the top plate is covered on the antenna body, the cold plate sealing cover is arranged on the lower side of the arc-shaped cold plate, the lower side surface of the arc-shaped cold plate is of an arc-shaped curved surface structure and protrudes downwards, a heat dissipation channel is formed between the upper side surface of the cold plate sealing cover and the lower side surface of the arc-shaped cold plate, two ends of the heat dissipation channel are respectively communicated with a first circulation port and a second circulation port at two ends of the arc-shaped cold plate. Compared with the prior art, the arc-shaped cold plate has the advantages that the lower side surface of the arc-shaped cold plate is arranged into the arc-shaped curved surface structure, the flow guide through hole is formed in the bottom of the heat dissipation through hole, cold air flows in from the flow guide through hole, hot air flows out from the first circulation port and the second circulation port, the heat dissipation efficiency is high, and the heat dissipation effect is good.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a communication-in-motion antenna.
Background
The traditional heat dissipation of the phase array antenna of the communication in motion usually adopts a fan to carry out active forced convection heat dissipation, and two or three centrifugal or axial fans can be carried on the back below or on the side surface of the phase array antenna of the communication in motion. Firstly, a fan on the mobile communication phased array antenna is taken as a life-prolonging part and may be damaged or reduced in performance in a complex environment; secondly, the fan generates large noise, which causes certain discomfort to users; thirdly, the fan can increase extra power consumption and oil consumption; finally, when the automobile runs at a high speed, if a dusty road or heavy rain weather occurs, dust or raindrops may enter the heat dissipation air duct along with air, so that dust accumulation and water accumulation are caused, the three-proofing performance of the heat dissipation cold plate is reduced, and even the fan is damaged.
In order to solve the problems caused by the heat exchange of the fan, measures generally adopted in the prior art are natural heat dissipation and passive forced heat dissipation. The natural heat dissipation means that the communication-in-moving phased array antenna does not adopt any active rotating equipment to drive air to flow and exchange heat, and only depends on the floating flow of heated air to dissipate heat. The heat dissipation mode is limited by a flowing physical mechanism, the convection heat transfer is very small, generally only 3-10W/m 2 ℃ (the convection heat transfer coefficient of forced air cooling can be usually higher by one order of magnitude), the bottom of the low-profile communication-in-motion phased array antenna generates heat more intensively and the heat source is more, even though fins are designed below the communication-in-motion phased array antenna, the natural convection heat transfer coefficient is still very low due to the horizontal bottom structure and the narrow air flowing space, the heat dissipation efficiency is lower, the emission quantity of the communication-in-motion phased array antenna is generally relatively large, the heat dissipation fins are designed too much, the appearance, the weight and the user experience of a product are affected, and therefore the traditional method for increasing the heat dissipation fins cannot meet the heat dissipation requirements and the application environment use of the current communication-in-motion phased array antenna.
Therefore, passive forced air cooling heat dissipation is preferably adopted in the prior art, and refers to that flat heat dissipation fins are designed in a heating concentration area at the bottom of a moving communication phased array antenna frame to form an air flow channel, and the air flow channel is the same as the driving direction of an automobile. When the automobile moves, air is passively filled into the radiating fins to perform forced convection heat exchange. The heat dissipation method has good heat dissipation effect when the automobile moves, but when the automobile stops, the straight fin cold plate only has small openings in the front and at the back of the automobile running direction, natural convection air cannot flow in the cold plate, the heat dissipation efficiency is greatly reduced, and the heat dissipation requirement of the communication-in-motion phased array antenna of the automobile under the condition that the automobile stops for a long time cannot be met.
Disclosure of Invention
The invention aims to provide a communication-in-motion phased array antenna which has good heat dissipation effect and can meet the heat dissipation requirement of the communication-in-motion phased array antenna of an automobile under the condition that the automobile stops for a long time.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the invention provides a communication-in-motion antenna, which includes an antenna body, an arc-shaped cold plate, a top plate and a cold plate sealing cover, wherein the antenna body is arranged on the upper side surface of the arc-shaped cold plate, the top plate is arranged on the antenna body in a covering manner, the cold plate sealing cover is arranged on the lower side of the arc-shaped cold plate, the lower side surface of the arc-shaped cold plate is in an arc-shaped curved surface structure and protrudes downwards, a heat dissipation channel is formed between the upper side surface of the cold plate sealing cover and the lower side surface of the arc-shaped cold plate, a first circulation port and a second circulation port are respectively arranged at two ends of the arc-shaped cold plate, two ends of the heat dissipation channel are respectively communicated with the first circulation port and the second circulation port.
In an alternative embodiment, the upper surface of the cold plate cover is also in an arc-shaped curved surface structure, so that the heat dissipation channel is in an arc shape.
In an alternative embodiment, the curvature of the upper surface of the cold plate cover is less than or equal to the curvature of the lower surface of the arc-shaped cold plate, so that the width of the middle part of the heat dissipation channel is less than or equal to the width of the two ends of the heat dissipation channel.
In an optional embodiment, a liquid discharge hole is formed in the middle of the cold plate cover, the flow guide through hole is formed in at least one side of the liquid discharge hole, and the distance between the liquid discharge hole and the top plate is greater than the distance between the flow guide through hole and the top plate.
In an optional embodiment, the lower side surface of the arc-shaped cold plate is further provided with a plurality of radiating fins, the cold plate cover is attached outside the plurality of radiating fins, the radiating channel is divided into a plurality of flow channels by the plurality of radiating fins, and two ends of each flow channel are respectively communicated with the first circulation port and the second circulation port.
In an alternative embodiment, each of the flow passages has a width gradually increasing in a direction extending from the middle portion to both ends.
In an optional embodiment, each of the heat dissipation fins is provided with a transverse spoiler, and the transverse spoiler is used for communicating two adjacent flow channels.
In an alternative embodiment, the number of the transverse turbulent flow openings is multiple, and the distance between two adjacent transverse turbulent flow openings gradually decreases in a direction extending from the middle part to two ends of the heat dissipation fin.
In an alternative embodiment, the opening area of the lateral turbulent flow port is gradually increased in a direction extending from the middle portion to both ends of the heat dissipation fin.
In an optional embodiment, a guide groove opening is formed in the middle of each of the heat dissipation fins, a plurality of guide groove openings jointly form a guide groove, and the guide groove is located in the middle of the lower side surface of the arc-shaped cold plate.
The beneficial effects of the embodiment of the invention include, for example:
according to the communication-in-motion antenna provided by the embodiment of the invention, the lower side surface of the arc-shaped cold plate is arc-shaped and protrudes downwards, so that the flow guiding effect is achieved, a heat dissipation channel is formed between the upper side surface of the cold plate sealing cover and the lower side surface of the arc-shaped cold plate, the two ends of the arc-shaped cold plate are respectively provided with the first circulation port and the second circulation port, the two ends of the heat dissipation channel are respectively communicated with the first circulation port and the second circulation port, and the cold plate sealing cover is provided with the flow guiding through hole communicated with the heat dissipation. When the communication-in-the-moving antenna is in a static state during actual heat dissipation, air is in a static state due to no relative movement, at the moment, the antenna body generates heat in a working mode and conducts the heat to the arc-shaped cold plate, the temperature of the arc-shaped cold plate rises, temperature difference is generated between the arc-shaped cold plate and the air in the heat dissipation channel, the air in the heat dissipation channel is heated and expanded, the density is reduced, and the hot air moves upwards to form natural convection. And hot-air flows towards both sides along the downside surface of arc cold drawing, has the trend of continuing to rise at the flow in-process to convection activity is stronger under the buoyancy, and hot-air can prolong the downside surface of arc cold drawing to flow to both sides rapidly under the buoyancy promptly, and flows out by first circulation mouth and second circulation mouth, has improved the radiating efficiency. Meanwhile, external cold air enters the heat dissipation channel from the flow guide through hole at the bottom of the heat dissipation channel, so that the cold air in the heat dissipation channel is supplemented, and the heat dissipation effect is greatly improved. Compared with the prior art, the arc-shaped cold plate has the advantages that the lower side surface of the arc-shaped cold plate is arranged into the arc-shaped curved surface structure, the flow guide through hole is formed in the bottom of the heat dissipation through hole, cold air flows in from the flow guide through hole, hot air flows out from the first circulation port and the second circulation port, the heat dissipation efficiency is high, and the heat dissipation effect is good.
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 communication-in-motion antenna provided in an embodiment of the present invention under a first viewing angle;
fig. 2 is a schematic structural diagram of a communication-in-motion antenna provided in an embodiment of the present invention under a second viewing angle;
fig. 3 is a schematic structural diagram of a communication-in-motion antenna provided in an embodiment of the present invention under a third viewing angle;
fig. 4 is a schematic structural diagram of a communication-in-motion antenna provided in an embodiment of the present invention under a fourth viewing angle;
fig. 5 is an exploded schematic structural diagram of a mobile communication antenna according to an embodiment of the present invention;
fig. 6 is a schematic partial structure diagram of a mobile communication antenna according to an embodiment of the present invention;
FIG. 7 is a partially enlarged view of VII of FIG. 6.
Icon: 100-a communication-in-motion antenna; 110-an arc-shaped cold plate; 120-an antenna body; 111-heat dissipation fins; 113-a first fin set; 115-a second fin set; 117-lateral flow perturbation ports; 119-a guide slot opening; 130-a top plate; 150-cold plate capping; 151-flow guiding through holes; 153-drain holes; 170-heat dissipation channels; 171-a first circulation port; 173-second flow port; 200-vehicle roof.
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, when a passive forced air cooling heat dissipation means is adopted, the conventional mobile antenna 100 generally adopts a straight fin cold plate for heat exchange, when the automobile moves, air is passively poured into the straight fin cold plate for forced convection heat exchange, so that a good heat dissipation effect can be ensured, but when the automobile stops, the straight fin cold plate is only provided with openings in the front and at the back of the automobile driving direction, and the inside of the cold plate is of a straight structure, so that air flow is difficult to form, the heat dissipation efficiency is greatly reduced, and the heat dissipation requirement of the mobile phased array antenna in the automobile under the condition of long-time stop of the automobile cannot be met. In addition, current straight fin cold plate when the automobile motion, inside outside dust or raindrop can get into straight fin cold plate along with the air, cause laying dust and ponding, influence the three proofings performance of heat dissipation cold plate, lead to the radiating efficiency decline of heat dissipation cold plate, can deposit the electrochemical corrosion that inside arouses even because the raindrop.
In order to solve the above problem, the present invention provides a communication-in-motion antenna 100, and it should be noted that, in a case of no conflict, features in the embodiments of the present invention may be combined with each other.
Referring to fig. 1 to 7, the present embodiment provides a mobile communication antenna 100, which can ensure that the heat dissipation effect in a static state meets the requirement, and can solve the problem of water accumulation and dust accumulation, ensure the heat dissipation efficiency, and avoid electrochemical corrosion caused by the accumulation of raindrops.
The communication-in-the-middle antenna 100 provided by this embodiment, including the antenna body 120, the arc-shaped cold plate 110, the top plate 130 and the cold plate cover 150, the antenna body 120 is disposed on the upper surface of the arc-shaped cold plate 110, the top plate 130 covers the antenna body 120, the cold plate cover 150 is disposed on the lower side of the arc-shaped cold plate 110, the lower surface of the arc-shaped cold plate 110 is an arc-shaped curved surface structure and protrudes downward, a heat dissipation channel 170 is formed between the upper surface of the cold plate cover 150 and the lower surface of the arc-shaped cold plate 110, the two ends of the arc-shaped cold plate 110 are respectively provided with the first circulation port 171 and the second circulation port 173, the two ends of the heat dissipation channel 170 are respectively communicated with the first circulation port 171 and the second circulation port 173, and the.
In this embodiment, the arc-shaped cold plate 110 is made of an aluminum alloy, and has a good heat transfer performance, the antenna body 120 is attached to the upper surface of the arc-shaped cold plate 110, meanwhile, other electronic components are attached to the upper surface of the arc-shaped cold plate 110, and the antenna body 120 and the electronic components are used as a heat source together, and generate a large amount of heat in a working state.
It should be noted that in the present embodiment, the communication-in-motion antenna 100 is disposed on the roof 200 of the automobile and fixed by the mounting bracket, wherein the payload of the antenna body 120 is located on the upper portion of the arc-shaped cold plate 110, and the first circulation port 171 and the second circulation port 173 are disposed along the moving direction of the automobile. When the automobile moves, air enters the heat dissipation channel 170 through the first circulation port 171 and flows out through the second circulation port 173, forced convection heat transfer is achieved, heat transferred by the arc-shaped cold plate 110 is taken away rapidly, the heat transfer process is completed, and the heat dissipation effect is guaranteed. When the automobile is stationary, since there is no relative movement, the air is also in a stationary state, at this time, the antenna body 120 generates heat in a working mode and conducts the heat to the arc-shaped cold plate 110, the temperature of the arc-shaped cold plate 110 rises, a temperature difference is generated between the heat and the air in the heat dissipation channel 170, the air in the heat dissipation channel 170 expands due to heating, the density decreases, and the hot air moves upward to form natural convection. And the hot air flows towards both sides along the lower side surface of the arc-shaped cold plate 110, and has a tendency to continue to rise in the flow process, and the convection activity is stronger under the action of buoyancy, i.e., the hot air can flow towards both sides along the lower side surface of the arc-shaped cold plate 110 rapidly under the action of buoyancy, and flows out from the first circulation port 171 and the second circulation port 173, thereby improving the heat dissipation efficiency. Meanwhile, external cold air enters the heat dissipation channel 170 through the flow guiding through holes 151 at the bottom of the heat dissipation channel 170, so that the cold air in the heat dissipation channel 170 is supplemented, and the heat dissipation effect is greatly improved.
In the present embodiment, the moving direction of the vehicle is defined as a first horizontal direction, the horizontal direction perpendicular to the moving direction of the vehicle is defined as a second horizontal direction, and the first circulation port 171 and the second circulation port 173 are respectively disposed at both ends of the arc-shaped cold plate 110 in the first horizontal direction. Meanwhile, the lower surface of the arc-shaped cold plate 110 is in an arc-shaped curved surface structure, which means that the vertical section of the arc-shaped cold plate 110 along the first direction is in an arc shape, and the lower edge of the section of the arc-shaped cold plate 110 is in an arc shape.
In this embodiment, the upper surface of the cold plate cover 150 is also curved to form an arc-shaped heat dissipation channel 170. Specifically, the vertical section of the cold plate cover 150 in the first direction is also arc-shaped and is downwardly convex, so that the upper side surface and the lower side surface of the cold plate cover 150 are both arc-shaped curved surface structures, and the heat dissipation channel 170 is arc-shaped. Here, the heat dissipation channel 170 is arc-shaped, which means that the heat dissipation channel 170 has an arc-shaped vertical cross-section along the first direction, and both ends of the heat dissipation channel 170 extend to the first circulation port 171 and the second circulation port 173, respectively.
In the present embodiment, the arc-shaped cold plate 110 and the cold plate cover 150 are both symmetrical structures, and the symmetrical planes of the arc-shaped cold plate 110 and the cold plate cover 150 are overlapped, wherein the symmetrical plane is a vertical plane along the second direction, and the symmetrical plane is located in the middle of the arc-shaped cold plate 110 and the cold plate cover 150, which refers to the center position on the solid or plane along the first direction in the present embodiment.
In this embodiment, the curvature of the upper surface of the cold plate cover 150 is less than or equal to the curvature of the lower surface of the arc-shaped cold plate 110, such that the width of the middle of the heat dissipation channel 170 is less than or equal to the width of the two ends of the heat dissipation channel 170. Specifically, the curvature of the cold plate cover 150 is smaller such that the width of the heat dissipation channel 170 gradually increases or remains constant from the middle to the ends. Preferably, the curvature of the upper surface of the cold plate cover 150 is less than the curvature of the lower surface of the arc-shaped cold plate 110, so that the heat dissipation channel 170 has a "narrow-center, large-end" structure, which is more favorable for the air flow in the static state and the forced convection of the air in the moving state.
It should be noted that in this embodiment, the greater the curvature of the cold plate cover 150, the more downwardly convex the cold plate cover 150, the greater the degree of influence on the profile, and the greater the curvature of the underside surface of the arc-shaped cold plate 110, the stronger the convection in the resting state. Therefore, in practical applications, the curvatures of the cold plate cover 150 and the arc-shaped cold plate 110 may be designed according to the heat load and the airflow heat exchange characteristics of the product, so as to obtain the best heat dissipation effect.
In this embodiment, the cold plate cover 150 has a liquid discharge hole 153 formed in the middle thereof, the flow guiding through hole 151 is formed on at least one side of the liquid discharge hole 153, and the distance between the liquid discharge hole 153 and the top plate 130 is greater than the distance between the flow guiding through hole 151 and the top plate 130. Specifically, the plurality of flow guide through holes 151 are symmetrically distributed on two sides of the liquid discharge hole 153, the flow guide through holes 151 are used for introducing external cold air into the heat dissipation channel 170 in a static state, and the liquid discharge hole 153 is arranged in the middle of the cold plate cover 150 and located at the lowest position of the cold plate cover 150, so that water drops, dust and the like existing in the heat dissipation channel 170 can fall to the liquid discharge hole 153 under the action of gravity and are discharged outwards from the liquid discharge hole 153.
In this embodiment, the flow guiding through hole 151 and the liquid discharging hole 153 are both in a strip shape, and the extending direction of the liquid discharging hole 153 is parallel to the second direction and is located in the middle of the cold plate cover 150. Preferably, the number of the flow guide through holes 151 is 6, the 6 flow guide through holes 151 are symmetrically distributed on two sides of the liquid discharge hole 153, and three flow guide through holes 151 are arranged on each side of the liquid discharge hole 153. The plurality of flow guide through holes 151 are parallel to each other and the drain holes 153, so that a flow guide passage and a drain passage are formed at the bottom of the cold plate cover 150.
It should be noted that, in this embodiment, the lower side surface of the cold plate cover 150 is also in an arc-shaped curved surface structure, and the cold plate cover 150 is disposed above the vehicle roof 200, the surface of the general vehicle roof 200 is in an arc-shaped structure, the lower side surface of the cold plate cover 150 and the arc-shaped vehicle roof 200 form a throat region with two wide ends and a narrow middle portion, and in a moving state, the air flow rate of the throat region at the lower portion of the cold plate cover 150 is increased, so that the static pressure of the throat region is reduced, an additional suction effect can be generated on the drain hole 153, and the drain dust removal effect of the drain hole 153 is.
The lower surface of the arc-shaped cold plate 110 is further provided with a plurality of heat dissipation fins 111, the cold plate cover 150 is attached outside the plurality of heat dissipation fins 111, the heat dissipation channel 170 is divided into a plurality of flow channels by the plurality of heat dissipation fins 111, and two ends of each flow channel are respectively communicated with the first circulation port 171 and the second circulation port 173. Specifically, the lower portions of the plurality of heat dissipation fins 111 abut against the upper side surface of the cold plate cover 150, the plurality of flow channels are all arranged along the first direction, and in a moving state, the flow channel direction is mostly overlapped with the moving direction, so that forced air convection is realized.
It should be noted that the structural dimensions of the heat dissipating fins 111 are adapted to the heat dissipating channel 170, so that the heat dissipating fins 111 are respectively contacted with the upper surface of the cold plate cover 150 and the lower surface of the arc-shaped cold plate 110 to form a flow channel, the heat dissipating fins 111 are integrally disposed on the lower surface of the arc-shaped cold plate 110, and the cold plate cover 150 is pressed on the heat dissipating fins 111.
In the present embodiment, each flow passage gradually increases in width in a direction extending from the middle portion to both ends. Specifically, each of the heat dissipating fins 111 has a hyperbolic configuration, and a connecting line between the heat dissipating fin 111 and the lower side surface of the arc-shaped cold plate 110 has an arc shape, while the heat dissipating fin 111 has an arc shape in a horizontal section parallel to the horizontal direction. And each of the heat dissipating fins 111 has a symmetrical structure, and the symmetrical plane overlaps with the symmetrical plane of the arc-shaped cold plate 110. The circle centers of the plurality of radiating fins 111 in the horizontal direction are distributed along the first direction, and the curvatures of the plurality of radiating fins 111 in the horizontal direction are gradually increased or decreased, so that the width of each flow channel is gradually increased from the middle part to two ends, namely each flow channel has the characteristics that the two ends are larger and the middle is smaller.
It should be noted that the plurality of heat dissipation fins 111 are divided into a plurality of first fin units and a plurality of second fin units, the plurality of first fin units form the first fin group 113, the plurality of second fin units form the second fin group 115, the first fin group 113 and the second fin group 115 are symmetrically arranged, a symmetry plane thereof is parallel to the first direction and perpendicular to the second direction, the symmetry plane is located at a central position of the arc-shaped cold plate 110 along the second direction, a curvature of the plurality of first fin units gradually increases from the symmetry plane to a direction away from the second fin group 115, and a curvature of the plurality of second fin units increases from the symmetry plane to a direction away from the first fin group 113.
In this embodiment, each heat dissipation fin 111 is provided with a transverse flow disturbing port 117, and the transverse flow disturbing port 117 is used for communicating two adjacent flow channels. Specifically, the transverse turbulent flow port 117 is opened at one side edge of the heat dissipation fin 111 close to the cold plate cover 150 and extends towards the arc-shaped cold plate 110, so that the airflow in the flow channel enters the adjacent flow channel closer to the central position through the transverse turbulent flow port 117 to generate airflow disturbance, and the heat exchange effect is enhanced.
In the present embodiment, the number of the lateral spoiler ports 117 is plural, and the distance between two adjacent lateral spoiler ports 117 is gradually decreased in a direction extending from the middle portion to both ends of the heat dissipating fin 111. Specifically, on the same heat dissipation fin 111, the arrangement density of the transverse turbulent flow ports 117 is gradually increased from the middle part to the two ends, so that the density of the middle part is smaller, the density of the two ends is higher, and the denser transverse turbulent flow ports 117 are arranged at the positions where the air velocities of the two ends are higher, so as to enhance the turbulent flow effect.
In the present embodiment, the opening area of the lateral turbulent flow port 117 gradually increases in a direction extending from the middle portion to both ends of the heat dissipation fin 111. Specifically, the height of the lateral spoiler opening 117 with respect to the upper side surface of the cold plate cover 150 is gradually increased from the middle of the heat dissipating fin 111 to the direction in which both ends extend, so that the opening area of the lateral spoiler opening 117 at both ends is made larger to enhance the spoiler effect at the position where both ends have a larger air flow velocity.
In this embodiment, the middle of each heat dissipating fin 111 has a guide slot opening 119, the guide slot openings 119 together form a guide slot, and the guide slot is located in the middle of the lower surface of the arc-shaped cold plate 110. Specifically, the diversion slot corresponds to the drain hole 153 on the cold plate cover 150, so that a drain chamber is formed above the drain hole 153, and the drain and dust removal effects are enhanced. In addition, the central location of the arcuate cold plate 110 forms a throat area, which is the primary channel for draining liquid droplets or sand dust.
The functional principle of the mobile antenna 100 according to the present embodiment is described below, and the detailed description is mainly given in terms of the enhanced heat dissipation mode in the stationary state, the heat dissipation mode in the moving state, and the liquid discharge and dust removal mode.
The communication-in-motion antenna 100 provided by the embodiment of the invention mainly aims at enhancing natural convection heat transfer in the enhanced heat dissipation of the automobile in a static state. The theoretical basis is that on one hand, the strength of natural convection heat transfer is in direct proportion to the component of gravity in the flow direction; on the other hand, along with the flow process of cooling air along the heat exchange wall surface, the thermal boundary layer is continuously increased, the flow state is converted into turbulent flow from laminar flow until a sufficiently long distance, and the scale of general electronic equipment cannot reach the turbulent flow conversion length, so that the heat dissipation of the general equipment is only strengthened by considering the natural convection laminar flow heat exchange. In the process that the thermal boundary layer is continuously increased, the thermal resistance for inhibiting the natural convection heat transfer strength is increased; therefore, the structure of the invention mainly aims at the optimization and improvement of the two factors so as to improve the natural convection heat exchange capability of the radiator.
For a static state, the communication-in-motion antenna 100 provided in this embodiment mainly aims at enhancing natural convection heat transfer to ensure a heat dissipation effect. In the communication-in-motion antenna 100 provided by the embodiment, when the automobile is in a stationary state, the communication-in-motion antenna 100 is in a stationary state, because there is no relative movement, the air is still in the initial state, and after the antenna body 120 on the upper surface of the arc-shaped cold plate 110 and other heat sources are in the working state, a large amount of heat is generated and transferred to the arc-shaped cold plate 110, at this time, the arc-shaped cold plate 110 is heated to raise the temperature and heat the air in the flow passage, the air is heated to expand, the density is reduced, buoyancy is generated under the action of gravity and air pressure, hot air is driven to rise to form natural convection, the natural convection generated by heating the bottom of the traditional flat-plate cold plate is completely supplemented by cold air at the center of the bottom, the hot air is extruded to flow out of the cold plate area from two sides and rises, the plate-type natural convection heat transfer is usually not high in strength, and the heat dissipation of the high-power communication-in-motion phased-array antenna is difficult to meet. Different from traditional flat cold drawing, in this structure, because the downside surface of arc cold drawing 110 is arc curved surface structure, the air has ascending height to the flow in-process of both sides along arc cold drawing 110, thereby produce extra gravity component gcos alpha, wherein alpha is the contained angle of pitch arc tangent line and gravity, this contained angle is less, this contained angle is more, gravity component is big more, it is big more to rise buoyancy to the convection current, the convection current is just more strong, thereby natural convection heat transfer coefficient has been increased, the radiating efficiency has been promoted, outside cold air is got into heat dissipation channel 170 by the water conservancy diversion through-hole 151 of heat dissipation channel 170 bottom simultaneously, thereby supply the inside cold air of heat dissipation channel 170, and the heat radiation effect is greatly improved.
Secondly, the heat dissipation fins 111 are related to a double-curve configuration, so that the width of the flow channel is gradually increased from the middle part to the two ends, and meanwhile, the height of the flow channel (i.e., the distance between the arc-shaped cold plate 110 and the cold plate sealing cover 150) is also gradually increased from the middle part to the two ends, so that the air flow channel is always adapted to the physical law that the volume flow of natural convection air is increased, the natural convection flow resistance is reduced, and the convection heat exchange strength is enhanced. And because the arc-shaped radiating fins 111 are in a hyperbolic curve configuration, the airflow direction is continuously changed in the process that air flows in the flow channel, so that centripetal movement is generated. The air is compressed by the slight centrifugal force (inertia), and when moving to the position of the lateral turbulent flow port 117, a small amount of air is compressed into the lateral turbulent flow port 117 and enters into the adjacent flow passage on the side closer to the center. The process generates disturbance at two places, firstly, when the air in the flow channel flows through the transverse flow disturbing port 117, the speed boundary layer is disturbed to a certain degree, the mixed flow strength of the air in the boundary layer is increased, and the thickness of the thermal boundary layer is reduced, so that the local heat exchange is enhanced to a certain degree; second, the small amount of air flowing into the cross flow port 117 creates turbulence in the air in the adjacent flow channel, and the velocity boundary layer turbulence causes an increase in the local heat exchange intensity in this flow channel. Meanwhile, the transverse turbulent flow port 117 is gradually encrypted from the middle part to the two ends, so that the problem that the speed and the thermal boundary layer of natural convection air flowing to the two sides along the flow channel are increased continuously to hinder the heat transfer intensity of convection is solved.
By the above measures, the natural heat dissipation strength of the mobile communication antenna 100 provided by the embodiment can be improved by about 30% compared with that of the conventional heat sink with the same size and scale.
The communication-in-motion antenna 100 provided by the embodiment of the invention moves relative to air when an automobile moves, the air flow is equivalent to increase of a driving force, forced convection heat transfer is achieved, and the heat transfer strength is improved by one magnitude. Therefore, the communication antenna in motion under the same working mode has no device overheating or failure accident under the natural heat dissipation condition (i.e. the static state), and generally has no problem under the forced convection heat transfer condition (i.e. the motion state). However, if the operation mode of the communication-in-motion antenna 100 is changed in a motion state, which results in an increase in the heat consumption of the device power, the heat dissipation in the motion state is also worth strengthening.
When the automobile moves, the static pressure of air at the first circulation port 171 of the communication-in-motion antenna 100 is increased, and air is "forcibly poured" into the flow passage to perform forced convection heat exchange. And the high-speed air changes the flow direction when flowing into the arc-shaped flow passage, and generates stronger centrifugal motion, so that the air at the centrifugal side is obviously extruded, the pressure is increased, and the air pressure at the centripetal side is reduced. One part of air on the centrifugal side enters the adjacent flow channel close to the center through the transverse turbulence port 117 to generate airflow disturbance, so that the heat exchange is enhanced, and the other part of air on the centrifugal side has a tendency of flowing towards the side of the center due to the obvious increase of pressure, so that secondary circulation is formed. The secondary circulation flow is synthesized with the main air flow, so that the convection heat exchange is enhanced.
By adopting the measures, the forced convection heat transfer strength of the mobile center antenna 100 can be improved by about 15 percent compared with that of the traditional radiator with the same size and material scale.
When the automobile moves, air enters the flow channel from the first flow port 171, the flow area of the flow channel is firstly reduced and then increased, the flow area at the central position of the arc-shaped cold plate 110 reaches the minimum, so that the air flow rate is firstly increased and then reduced, and the highest speed point is formed at the position where the flow area of the arc-shaped cold plate 110 is the minimum. Meanwhile, the flow channel changes the movement direction of the air flow, so that the air flow entering the flow channel forms centrifugal movement, the inertia of water drops or gravel with high density is high, and the water drops or gravel are thrown out of the cold plate when the air flows to the bottom liquid discharge hole 153, so that the purposes of liquid discharge and dust removal are achieved. In addition, the automobile roof 200 is generally an arc-shaped curved surface, and forms a radiator outer flow area with large two sides and small middle with an arc-shaped diversion cover (bottom area of the communication-in-motion phased array antenna). In the flow region, the speed of high-speed air is increased in the throat region, and the static pressure of the high-speed air is reduced due to the increase of the speed of the high-speed air according to the Bernoulli principle, so that water drops or gravel at the liquid outlet of the radiator are additionally pumped, and the dust removal effect of the liquid discharged from the radiator is further enhanced.
In summary, the communication-in-motion antenna 100 provided in this embodiment can ensure that the heat dissipation effect under the static state and the motion state meets the requirement, and meanwhile, can solve the problem of water accumulation and dust accumulation, ensure the heat dissipation efficiency, and avoid electrochemical corrosion caused by the raindrops accumulating inside.
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 (10)
1. The utility model provides a communication in moving antenna, its characterized in that, includes antenna body, arc cold drawing, roof and cold drawing closing cap, the antenna body sets up the upside surface of arc cold drawing, the roof lid is established on the antenna body, the cold drawing closing cap sets up the downside of arc cold drawing, the downside surface of arc cold drawing is arc curved surface structure and is downward protruding, the upside surface of cold drawing closing cap with form heat dissipation channel between the downside surface of arc cold drawing, the both ends of arc cold drawing are provided with first circulation mouth and second circulation mouth respectively, heat dissipation channel's both ends respectively with first circulation mouth with second circulation mouth intercommunication, just seted up on the cold drawing closing cap with the water conservancy diversion through-hole of heat dissipation channel intercommunication.
2. The mobile communication antenna of claim 1, wherein the upper surface of the cold plate cover is also curved to form an arc shape of the heat dissipation channel.
3. The mobile communication antenna of claim 2, wherein the curvature of the upper surface of the cold plate cover is smaller than or equal to the curvature of the lower surface of the arc-shaped cold plate, so that the width of the middle part of the heat dissipation channel is smaller than or equal to the width of the two ends of the heat dissipation channel.
4. The communication-in-motion antenna according to claim 3, wherein a drain hole is formed in a middle portion of the cold plate cover, the flow guiding through hole is formed on at least one side of the drain hole, and a distance between the drain hole and the top plate is greater than a distance between the flow guiding through hole and the top plate.
5. The communication-in-motion antenna according to claim 1, wherein a plurality of heat dissipation fins are further disposed on a lower surface of the arc-shaped cold plate, the cold plate cover is attached to the outside of the plurality of heat dissipation fins, the heat dissipation channel is divided into a plurality of flow channels by the plurality of heat dissipation fins, and two ends of each flow channel are respectively communicated with the first circulation port and the second circulation port.
6. The mobile communication antenna of claim 5, wherein each of the flow channels has a width gradually increasing in a direction extending from a middle portion to both ends.
7. The communication-in-motion antenna as recited in claim 5, wherein each of the heat dissipation fins has a lateral spoiler opening, and the lateral spoiler openings are used for communicating two adjacent runners.
8. The mobile communication-in-motion antenna according to claim 7, wherein the number of the lateral spoiler ports is plural, and a distance between two adjacent lateral spoiler ports gradually decreases in a direction extending from a middle portion to both ends of the heat dissipation fin.
9. The mobile communication antenna of claim 7, wherein the opening area of the transverse turbulent flow port gradually increases in a direction extending from the middle portion to both ends of the heat dissipation fin.
10. The communication-in-motion antenna according to claim 5, wherein a guide slot opening is formed in the middle of each of the heat dissipation fins, and a plurality of the guide slot openings together form a flow guiding slot, and the flow guiding slot is located in the middle of the lower side surface of the arc-shaped cold plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011141998.9A CN112038747A (en) | 2020-10-22 | 2020-10-22 | Antenna for communication in motion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011141998.9A CN112038747A (en) | 2020-10-22 | 2020-10-22 | Antenna for communication in motion |
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| CN112038747A true CN112038747A (en) | 2020-12-04 |
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| CN202011141998.9A Pending CN112038747A (en) | 2020-10-22 | 2020-10-22 | Antenna for communication in motion |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310593A (en) * | 2020-12-24 | 2021-02-02 | 成都天锐星通科技有限公司 | Vehicle-mounted communication antenna |
| WO2023226165A1 (en) * | 2022-05-27 | 2023-11-30 | 成都天锐星通科技有限公司 | Communications-on-the-move antenna and vehicle |
-
2020
- 2020-10-22 CN CN202011141998.9A patent/CN112038747A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310593A (en) * | 2020-12-24 | 2021-02-02 | 成都天锐星通科技有限公司 | Vehicle-mounted communication antenna |
| WO2023226165A1 (en) * | 2022-05-27 | 2023-11-30 | 成都天锐星通科技有限公司 | Communications-on-the-move antenna and vehicle |
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