CN214307031U - Constant-temperature phase-change radiator and lamp - Google Patents
Constant-temperature phase-change radiator and lamp Download PDFInfo
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- CN214307031U CN214307031U CN202120384555.6U CN202120384555U CN214307031U CN 214307031 U CN214307031 U CN 214307031U CN 202120384555 U CN202120384555 U CN 202120384555U CN 214307031 U CN214307031 U CN 214307031U
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Abstract
The utility model discloses a constant temperature phase change radiator and lamps and lanterns for dispel the heat to the piece that generates heat, constant temperature phase change radiator includes: the heating device comprises a shell, a heating element and a heating element, wherein a cavity with an opening is formed in the shell, and the opening is used for being connected with the heating element; the heat radiating fins are connected to the outer peripheral surface of the shell, the heat radiating fins are hollow and communicated with the cavity, the heating piece, the shell and the heat radiating fins jointly form a closed phase change cavity, phase change media are filled in the phase change cavity, and the heat radiating fins are made of flexible materials so as to adjust the heat radiating area of the heat radiating fins according to the difference between the internal pressure and the external pressure of the phase change cavity. The utility model provides a constant temperature phase change radiator and lamps and lanterns has solved the not good enough technical problem of current radiator radiating effect.
Description
Technical Field
The utility model relates to a heat dissipation field especially relates to a constant temperature phase transition radiator and lamps and lanterns.
Background
Electronic components often generate a large amount of heat during operation, and a heat sink is usually required to be mounted on the electronic components to dissipate the heat, so as to ensure the normal operation of the electronic components. The traditional heat radiator comprises a heat absorbing body and heat radiating fins arranged on the heat absorbing body, wherein the heat absorbing body is made of metal materials with good heat conductivity, such as copper, aluminum and the like, but the heat conductivity of the metal materials is easily limited by the materials or the ambient temperature, and for electronic components with high heat productivity, obvious thermal resistance can be generated to avoid achieving a good heat radiating effect, so that the operation stability of the electronic components is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a constant temperature phase change radiator and lamps and lanterns aims at solving the not good enough technical problem of current radiator radiating effect.
In order to achieve the above object, an embodiment of the present invention provides a constant temperature phase change heat radiator for heat dissipation is generated to a piece that generates heat, constant temperature phase change heat radiator includes:
the heating device comprises a shell, a heating element and a heating element, wherein a cavity with an opening is formed in the shell, and the opening is used for being connected with the heating element;
the heat radiating fins are connected to the outer peripheral surface of the shell, the heat radiating fins are hollow and communicated with the cavity, the heating piece, the shell and the heat radiating fins jointly form a closed phase change cavity, phase change media are filled in the phase change cavity, and the heat radiating fins are made of flexible materials so as to adjust the heat radiating area of the heat radiating fins according to the difference between the internal pressure and the external pressure of the phase change cavity.
Optionally, in an embodiment of the present invention, the heat dissipation fins and the heat generating members are disposed on opposite sides of the housing.
Optionally, in an embodiment of the present invention, the heat dissipation fins are disposed at intervals, and a plurality of the heat dissipation fins are disposed along the surface array of the casing deviating from the phase-change cavity.
Optionally, in an embodiment of the present invention, a cross-sectional area of the casing near one end of the heat generating member is smaller than a cross-sectional area of the casing far away from one end of the heat generating member.
Optionally, the utility model relates to an embodiment, constant temperature phase transition radiator is still including connecting the base, connect the base set up in the opening part, connect the base seted up with the installation notch of cavity intercommunication, it is in to generate heat a detachable setting the installation notch is intraoral.
Optionally, in an embodiment of the present invention, the connection base is detachably connected to the housing.
Optionally, in an embodiment of the present invention, the connection base, the connection portion of the casing, the connection base, and the connection portion of the heat generating member are respectively provided with a sealing ring.
Optionally, in an embodiment of the present invention, the heat dissipation fins and the housing are integrally formed.
In order to achieve the above object, an embodiment of the present invention provides a lamp, the lamp includes base and the constant temperature phase change heat radiator of the above description, wherein, the piece that generates heat is the base plate, the base plate deviates from one side of phase change heat radiator is provided with the light source.
Optionally, in an embodiment of the present invention, the substrate is a superconducting aluminum substrate.
Compared with the prior art, the utility model provides an among the technical scheme, form a phase transition chamber jointly through the casing, generate heat piece and heat radiation fins, fill the phase transition medium in the phase transition chamber, utilize the heat absorption of phase transition medium when the phase transition and heat radiation fins's heat conduction effect, effectually dispel the heat to the piece that generates heat. And the sizes of the inner surface area and the outer surface area of the radiating fin made of flexible materials are changed according to the change of the ambient temperature, and the boiling point of the phase change medium is basically constant because the pressure of the phase change medium gas in the phase change cavity is slightly greater than the atmospheric pressure of the ambient air, so that the surface temperature of the heating element is constant.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of the constant temperature phase change heat sink of the present invention;
fig. 2 is a schematic view of a part of the structure of the constant temperature phase change heat sink of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
2 | |
| 3 | |
4 | |
| 5 | Connecting |
6 | Mounting notch |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope protected by the embodiments of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions related to "first", "second", and the like in the embodiments of the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the embodiments of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "fixed" and the like are to be understood in a broad sense, for example, "fixed" may be a fixed connection, a detachable connection, or an integral body; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.
In addition, technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory to each other or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and the combination is not within the protection scope claimed by the embodiments of the present invention.
The existing high-power (heating power is more than or equal to 50W) LED lamp radiator adopts material heat conduction, fin and air convection, or local heat pipe heat conduction, fin and air convection, and generally needs to adopt metal materials (copper, aluminum, etc.) with high thermal conductivity or graphene composite materials (such as graphene engineering plastics) with high thermal conductivity. However, the heat sink has the following problems in use:
the LED substrate and the radiator are usually connected by a soldering or heat-conducting silicone grease (glue) bonding process, and the heat-conducting heat flow density of a local area of a light source on the LED substrate is very high and can reach 500KW/m2The temperature gradient of the area is large, so that the integral heat conduction resistance of the surface of the heat dissipation part is large, and the heat dissipation of the heat radiator is not facilitated;
in the existing high-power LED phase-change radiator, a copper heat pipe is generally connected with an aluminum fin, the connection mode is usually riveting, expansion joint or welding, the process is complex, and the cost is high;
the LED substrate and the radiator are connected by adopting a soldering process or a heat-conducting silicone grease (glue) bonding process, the quality of the soldering or bonding process is not well controlled, the reliability is not high, simultaneously, cavities are easy to generate by large-area soldering or easy heat-conducting silicone grease (glue) bonding, and the heat conductivity coefficient of the radiator is reduced after the radiator is used for a long time, so that the heat conductivity is deteriorated and even a light source is burnt;
the thermal conductivity of the metal material is easily limited by the material itself or the ambient temperature, and for an electronic component with high heat value, obvious thermal resistance is generated, so that a good heat dissipation effect cannot be achieved, and the stability of the operation of the electronic component is affected.
In view of this, in order to solve one of the above problems, an embodiment of the present invention provides a constant temperature phase change heat sink, in which heat dissipation fins made of a flexible material can actively adjust the heat dissipation area of the heat dissipation fins according to the difference between the internal pressure and the external pressure of a phase change cavity, so as to effectively dissipate heat from a heat generating component, and thus the temperature of the heat generating component is relatively balanced.
In order to better understand the technical scheme, the technical scheme is described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the embodiment of the utility model provides a constant temperature phase change heat radiator for to generating heat 3 and dispelling the heat, constant temperature phase change heat radiator includes:
the heating device comprises a shell 1, wherein a cavity with an opening is formed in the shell 1, and the opening is used for being connected with a heating element 3;
the heat dissipation device comprises heat dissipation fins 2, the heat dissipation fins 2 are connected to the outer peripheral surface of a shell 1, the heat dissipation fins 2 are hollow and communicated with a cavity, a heating piece 3, the shell 1 and the heat dissipation fins 2 jointly form a closed phase change cavity 4, a phase change medium is filled in the phase change cavity 4, and the heat dissipation fins 2 are made of flexible materials so as to adjust the heat dissipation area of the heat dissipation fins 2 according to the difference between the internal pressure and the external pressure of the phase change cavity 4.
In the technical scheme adopted by the embodiment, the shell 1, the heating element 3 and the heat radiating fins 2 jointly form a phase change cavity 4, the phase change cavity 4 is filled with a phase change medium, and the heat absorption of the phase change medium during phase change and the heat conduction of the heat radiating fins 2 are utilized to effectively radiate the heating element 3. Moreover, the sizes of the inner and outer surface areas of the heat dissipation fins 2 made of flexible materials are changed according to the change of the ambient temperature, and the boiling point of the phase change medium is basically constant because the pressure of the phase change medium gas in the phase change cavity 4 is slightly larger than the atmospheric pressure of the ambient air, so that the surface temperature of the heating element is constant.
Specifically, the shell 1 may be made of a flexible material, a cavity is formed inside the shell 1, an opening is formed in the bottom surface of the shell 1, the heating element 3 is disposed at the opening, the top of the shell 1 is provided with the heat dissipation fins 2, the heat dissipation fins 2 are of a hollow structure and are communicated with the cavity, so that the heating element 3 faces the side surface of the cavity, the inner surface of the heat dissipation fins 2 and the cavity of the shell 1 jointly form a phase change cavity 4, a phase change medium may be filled in the phase change cavity 4, the phase change medium may be pure water, acetone, ethanol, methanol, ammonia water or other liquid media, the liquid filling amount may be determined according to the volume size of the phase change cavity 4, the structural form and the power of the heating element 3, and the air in the sealed space is discharged as much as possible when the phase change cavity 3 is sealed.
In this embodiment, the heat dissipation principle of the heat sink is as follows: the back of the LED substrate (or lamp panel) or the power device package substrate is used as the heating element 3, and directly contacts with the evaporation surface of the phase change medium for boiling heat exchange, so that the back of the heating element 3 and the phase change medium exchange heat through boiling, and the heat exchange coefficient is about 20000-100000W/m2The gas of the phase change medium exchanges heat with the inner surface of the radiating fins 2 in a condensation mode, and the heat exchange coefficient is about 5000W/m2The heat of the inner surface of the heat dissipation fins 2 is transferred to the outer surface of the heat dissipation fins 2 in a heat conduction mode, and the outer surface of the heat dissipation fins 2 and the outside air perform free convection heat transfer, so that the heat dissipation effect on the heating element 3 is realized.
The heat dissipation fins 2 can be made into any hollow shape, and the heat dissipation performance mainly depends on the external surface area (i.e. the area of the part in contact with the air) and the structural arrangement mode. In this embodiment, the heat dissipation fins 2 may be made of a flexible material, and specifically, different flexible materials may be adopted according to different application scenarios, for example, butyl rubber (IIR) or Ethylene Propylene Diene Monomer (EPDM) with strong weather resistance may be adopted outdoors, silicone rubber, nitrile rubber, soft plastic, etc. may be adopted indoors, the heat conductivity of the material has little influence on the overall heat dissipation of the heat dissipation fins 2, and since the heat exchange between the outer surfaces of the heat dissipation fins 2 and the air at normal temperature is natural convection, the heat flow density is low and is usually lower than 400W/m2So that the difference of the thermal conduction resistances of the tube walls of the radiating fins 2 is less than 2 ℃.
When the radiator works, the temperature of the back surface of a heating element 3 such as an LED substrate or a power device is only dependent on the thermophysical property of a phase change medium, mainly has a boiling point under atmospheric pressure, is irrelevant to the air environment temperature under the condition that the external surface area of the radiating fins 2 is enough, the air environment temperature only influences the shape of the radiating fins 2 and the total radiating surface area, and the temperature of a PN section of the LED and the power device chip is close to constant temperature. That is, since the heat dissipation fins 2 are made of flexible material, the sizes of the inner and outer surface areas thereof can be changed according to the changes of the ambient temperature and other conditions (mainly the size of natural wind), the pressure of the phase-change medium gas in the phase-change cavity 4 is slightly greater than the atmospheric pressure of the ambient air, so that the boiling point of the medium is basically constant (about 1 atmospheric pressure), thereby the temperature of the back surface of the heating member 3 such as the LED substrate is constant, and the PN temperature of the LED or the power device chip is not changed by the changes of the ambient temperature and conditions during operation. It can be understood that, when the pressure grow in the phase transition chamber 4, heat radiation fin 2 is propped greatly, lead to the surface area grow, heat radiating area increases promptly, make the area of contact grow with the outside air, thereby can more effective heat dissipation, when the pressure in the phase transition chamber 4 diminishes, heat radiation fin 2 becomes flat, lead to the surface area to diminish, heat radiating area diminishes promptly, make the area of contact with the outside air less, thereby avoid excessive heat dissipation, to sum up, through heat radiation fin 4's heat radiating surface area's change, can make the PN festival temperature of LED and power device chip be close to constant temperature.
It should be noted that, when the heat sink works, because the phase change medium in the phase change cavity 4 is in the circulation of evaporation and condensation, the gas pressure of the phase change medium will also generate a small fluctuation, so that the outer surface of the heat dissipation fin 2 is accompanied by a small shock, and further the natural convection heat exchange between the outer surface of the heat dissipation fin 2 and the air is enhanced, i.e. the heat dissipation effect is promoted.
Further, in an embodiment of the present invention, the heat dissipation fins 2 and the heat generating members 3 are disposed on two opposite sides of the housing 1.
In the technical scheme that this embodiment adopted, phase change medium can become gaseous state when being heated, and gaseous flow to the top in phase change chamber 4, consequently, set up heat radiation fins 2 at the top of casing 1, set up the piece 3 that generates heat in the bottom of casing 1 simultaneously to make things convenient for phase change of phase change medium, more be favorable to the heat dissipation.
Further, referring to fig. 2, in an embodiment of the present invention, the heat dissipation fins 2 are disposed at intervals, and the heat dissipation fins 2 are disposed along the surface array of the casing 1 away from the phase-change cavity 4.
In the technical scheme adopted by the embodiment, the plurality of radiating fins 2 are arranged, so that the contact area with the outside air can be increased, and the radiating effect can be improved. Preferably, a plurality of heat dissipation fins 2 are spaced apart from each other by a predetermined interval, and the heat dissipation function of each heat dissipation fin 2 is independent.
Further, in an embodiment of the present invention, a cross-sectional area of the casing 1 near one end of the heating element 3 is smaller than a cross-sectional area of the casing 1 far away from one end of the heating element 3.
In the technical scheme that this embodiment adopted, the cross sectional area that is close to 3 one ends that generate heat is little for the phase change medium in the phase change chamber 4 boils more easily, thereby takes place the phase transition, and the one end cross sectional area who keeps away from 3 that generate heat is big, is favorable to the phase change medium to take place gaseous diffusion behind the phase transition, thereby accelerates with the cold and hot exchange of outside air, further improves the radiating effect.
Further, refer to fig. 1, the utility model discloses an in the embodiment, constant temperature phase change radiator is still including connecting base 5, connects base 5 and sets up in the opening part, connects base 5 and sets up the installation notch 6 with the cavity intercommunication, and 3 detachable settings of the piece that generates heat are in installation notch 6.
In the technical scheme adopted by the embodiment, the connecting base 5 is arranged for facilitating the installation of the heating element 3, and the heating element 3 is assembled on the connecting base 5 to realize the sealing of the cavity, so that the phase change cavity 4 is formed. In addition, in order to reduce the whole thickness of connecting base 5 and the 3 post-assembling that generate heat, installation notch 6 has been seted up on connecting base 5, it sets up in installation notch 6 to generate heat 3, installation notch 6 can be including the first notch and the second notch of intercommunication, first notch is close to the cavity setting and communicates with the cavity, the cross sectional area of first notch is less than the cross sectional area of second notch, make the junction of first notch and second notch form a step-like structure, generate heat 3 and set up in the step department, and generate heat 3 stride and establish the both sides at first notch, thereby make the cavity seal and form phase transition chamber 4. The heating part 3 is detachably connected with the mounting notch 6, the heating part 3 is convenient to maintain and replace, and preferably, the heating part 3 is fixed in the mounting notch 6 through a bolt.
Further, in an embodiment of the present invention, the connection base 5 is detachably connected to the housing 1.
In the technical scheme of this embodiment adoption, connect base 5 can be through bolt and casing 1 fixed connection, the dismouting of conveniently connecting base 5.
Further, in an embodiment of the present invention, the connection base 5, the connection portion with the casing 1, the connection portion of the connection base 5 and the heating element 3 are respectively provided with a sealing ring.
In the technical scheme adopted by the embodiment, the connection tightness can be increased through the sealing ring, and the pressure stability in the phase change cavity 4 is ensured.
Further, in an embodiment of the present invention, the heat dissipation fins 2 are formed integrally with the housing 1.
In the technical scheme adopted by the embodiment, the integrated forming process is mature, the connection between the radiating fins 2 and the shell 1 is more stable and reliable, and gaps at the connection part can be avoided, so that the sealing performance of the phase change cavity 4 can be improved.
In order to achieve the above object, an embodiment of the present invention provides a lamp, which includes a base and the above-described constant temperature phase change heat sink, wherein the heat generating member is a substrate, and one side of the substrate departing from the phase change heat sink is provided with a light source. Specifically, the specific structure of the constant-temperature phase-change heat sink refers to the above embodiment, and since the lamp adopts all technical solutions of the above embodiment, at least all beneficial effects brought by the technical solutions of the above embodiment are achieved, and no further description is given here.
Further, in an embodiment of the present invention, the substrate is a superconducting aluminum substrate.
In the technical scheme adopted by the embodiment, the substrate is made of the superconducting aluminum alloy, the substrate is too thick, the heat conduction and heat resistance is large, the substrate is too thin and is not enough in strength, the thickness of the substrate can be 1.5mm, the strength requirement is ensured, the heat conduction and heat resistance is not large, and the equivalent heat conductivity coefficient of the ALC aluminum substrate is about 122W/(m DEG C)) The maximum heat flux density that the structure can support is about 1MW/m2And the heat dissipation requirements of all light sources can be completely met.
The above is only the preferred embodiment of the present invention, and the patent scope of the embodiments of the present invention is not limited thereby, and all the equivalent structure changes made by the embodiment of the present invention and the attached drawings or the direct/indirect application in other related technical fields are included in the patent protection scope of the embodiments of the present invention.
Claims (10)
1. The utility model provides a constant temperature phase transition radiator for to generating heat a heat dissipation, its characterized in that, constant temperature phase transition radiator includes:
the heating device comprises a shell, a heating element and a heating element, wherein a cavity with an opening is formed in the shell, and the opening is used for being connected with the heating element;
the heat radiating fins are connected to the outer peripheral surface of the shell, the heat radiating fins are hollow and communicated with the cavity, the heating piece, the shell and the heat radiating fins jointly form a closed phase change cavity, phase change media are filled in the phase change cavity, and the heat radiating fins are made of flexible materials so as to adjust the heat radiating area of the heat radiating fins according to the difference between the internal pressure and the external pressure of the phase change cavity.
2. The constant temperature phase change heat sink of claim 1, wherein the heat fins and the heat generating element are disposed on opposite sides of the housing.
3. The constant-temperature phase-change heat sink as claimed in claim 1, wherein the plurality of heat dissipation fins are arranged at intervals, and the plurality of heat dissipation fins are arranged along a surface array of the shell body facing away from the phase-change cavity.
4. The constant temperature phase change heat sink as claimed in claim 1, wherein a cross-sectional area of an end of the case near the heat generating member is smaller than a cross-sectional area of an end of the case far from the heat generating member.
5. The constant-temperature phase-change heat radiator of claim 1, further comprising a connecting base, wherein the connecting base is arranged at the opening, the connecting base is provided with an installation notch communicated with the cavity, and the heating element is detachably arranged in the installation notch.
6. A thermostatic phase change heat sink according to claim 5, wherein the connection base is removably connected to the housing.
7. The constant-temperature phase-change heat radiator as claimed in claim 6, wherein sealing rings are respectively arranged at the connection part of the connection base and the shell and at the connection part of the connection base and the heating element.
8. The constant temperature phase change heat sink of any one of claims 1-7, wherein the fins are integrally formed with the housing.
9. A lamp, characterized in that the lamp comprises a base and the constant temperature phase change heat sink as claimed in claims 1-8, wherein the heat generating member is a substrate, and a light source is disposed on a side of the substrate away from the phase change heat sink.
10. The lamp of claim 9, wherein the substrate is a superconducting aluminum substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120384555.6U CN214307031U (en) | 2021-02-20 | 2021-02-20 | Constant-temperature phase-change radiator and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120384555.6U CN214307031U (en) | 2021-02-20 | 2021-02-20 | Constant-temperature phase-change radiator and lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214307031U true CN214307031U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120384555.6U Active CN214307031U (en) | 2021-02-20 | 2021-02-20 | Constant-temperature phase-change radiator and lamp |
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| Country | Link |
|---|---|
| CN (1) | CN214307031U (en) |
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2021
- 2021-02-20 CN CN202120384555.6U patent/CN214307031U/en active Active
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