Module phase change radiator capable of adapting to illumination in various directions

Abstract

The invention relates to a module phase change radiator capable of adapting to illumination in all directions. The radiator comprises a radiating bottom plate and a radiating main body, the heat dissipation body comprises a middle phase change cavity of an integrated structure and a plurality of longitudinal heat dissipation fins which are arranged on the two sides of the phase change cavity at equal intervals and are parallel to each other. The heat dissipation bottom plate blocks the bottom of the phase change cavity; the transverse cooling fins B are arranged on the two sides of the phase change cavity at equal intervals and are parallel to each other; and the longitudinal heat dissipation fins and the transverse heat dissipation fins B are vertically crossed with each other. The heat dissipation capacity of the module phase-change radiator is multiple times that of a common radiator under the condition of the same size, after the module phase-change radiator is installed on a lamp, 360-degree pitching angle adjustment can be conducted along with the lamp, the heat dissipation effect of the module phase-change radiator is basically not affected no matter what angle the lamp is fixed to, and the application scenarios of the module phase-change radiator are greatly increased through the radiator.

Description

Technical Field:

[0001] The present invention belongs to the technical field of radiators and relates to a modular phase change radiator adaptable to lighting in all directions. Background Art:

[0002] LED lamps are widely used in today's life. While achieving lighting, they also generate a large amount of heat. The main reason for the heat generation of LED lamps is the low electro-optical conversion efficiency. Although the electro-optical conversion efficiency of LED light sources can reach 20% to 30%, about 70% of the electrical energy is still converted into heat. Therefore, LED lamps with slightly higher power are equipped with radiators, and the power is proportional to the size of the radiator. Ordinary radiators are usually composed of multiple heat dissipation fins, and mainly rely on increasing the heat dissipation area of the radiator to complete heat dissipation. Compared with a single multi-fin radiator, the composite phase change radiator has a stronger heat dissipation ability. However, due to the limitation of the phase change heat dissipation mechanism principle, the light source installed on it can only irradiate downward, or can only be obliquely irradiated downward at a slightly inclined angle. If the deflection angle is too large, the heat dissipation ability of the phase change radiator will be greatly reduced, thereby damaging the light source or significantly reducing the service life of the light source. Even if a polarizing lens is installed, its irradiation angle is still limited. When the lamp needs to irradiate horizontally or obliquely upward, etc., it can only abandon the lamp with a composite phase change radiator and use a lamp with an ordinary radiator. Therefore, the lamp equipped with a composite phase change radiator has great limitations in the usage scenario. Summary of the Invention:

[0003] The technical problem to be solved by the present invention is to provide a modular phase change radiator adaptable to lighting in all directions.

[0004] To solve the above technical problem, the modular phase change radiator adaptable to lighting in all directions of the present invention includes a heat dissipation bottom plate and a heat dissipation main body; the heat dissipation main body includes a phase change cavity in the middle of an integrated structure and a plurality of longitudinal heat dissipation fins arranged at equal intervals and parallel to each other on both sides of the phase change cavity; the heat dissipation bottom plate is sealed at the bottom of the phase change cavity; it is characterized in that it further includes a plurality of B transverse heat dissipation fins arranged at equal intervals and parallel to each other on both sides of the phase change cavity; the longitudinal heat dissipation fins and the B transverse heat dissipation fins are perpendicular and cross each other.

[0005] The upper surface of the heat dissipation bottom plate is a surface treated by single-phase powder sintering.

[0006] The heat dissipation bottom plate is a high thermal conductivity metal plate.

[0007] The side surface of the heat dissipation bottom plate has a first step and a second step; the first step and the second step are in interference fit with the sealing step at the bottom of the phase change cavity, and the groove between the first step and the second step forms a glue filling groove.

[0008] The longitudinal heat dissipation fins are wedge-shaped.

[0009] The heat dissipation body further includes a plurality of A lateral heat dissipation fins that are equally spaced and parallel to each other at the top of the phase change cavity.

[0010] Let the distal width of the longitudinal heat dissipation fin be h 1 , and the proximal width be h 2 , the external height of the phase change cavity be H 1 , the height of the radiator be H 2 , the width of the radiator be W, the number of longitudinal heat dissipation fins be n, and the following relationships should be satisfied for each parameter:

[0011] h 2 > h 1 > H 2 / 6, H 1 ≥h 2 > H 1 / 2 > H 2 / 4, H 2 -h 2 > H 2 / 2, W / n < 6h 2 / 5.

[0013] The central part inside the phase change cavity has a heat conduction column, whose top is integrally connected to the top wall of the phase change cavity, and the bottom is hermetically connected to the heat dissipation bottom plate.

[0014] The heat conduction column is preferably frustum-shaped with a thicker top and a thinner bottom, and the phase change cavity is preferably square-column-shaped.

[0015] Let the bottom diameter of the heat conduction column be r 2 , and the top diameter be r 1 , the length and width of the phase change cavity are both L, and the three preferably satisfy the following relational expression:

[0016] L / 12 < r 1 < L / 6, 7L < 100r 2 < 100r 1 .

[0018] Beneficial effects:

[0019] 1. The radiator of the present invention can be adjusted at a 360-degree pitching angle along with the lamp. No matter what angle the lamp is fixed at, the heat dissipation effect of the module phase change radiator is basically not affected, and it can be applied in more places.

[0020] 2. Under the same volume, the radiator of the present invention has a stronger heat dissipation capacity compared with ordinary radiators.

[0021] 3. The radiator of the present invention can be mass-produced through a simple manufacturing process, can be batch-applied to lamp products, and has high cost performance.

[0022] Under the same volume, the heat dissipation capacity of the present invention is several times that of ordinary radiators. After being installed on the lamp, it can be adjusted by 360 degrees in pitch angle along with the lamp. No matter what angle the lamp is fixed at, the heat dissipation effect of the module phase change radiator is basically not affected. This radiator greatly increases the application scenarios of the module phase change radiator. Description of the Drawings:

[0023] Figure 1 It is the bottom view of the present invention.

[0024] Figure 2 It is the front view of the present invention.

[0025] Figure 3 It is the top view of the present invention.

[0026] Figure 4 It is the exploded view of the present invention.

[0027] Figure 5 It is the isometric view of the heat dissipation main body of the present invention.

[0028] Figure 6 It is the partial enlarged cross-sectional view of the heat dissipation bottom plate and the phase change cavity.

[0029] Figure 7 It is the partial cross-sectional view of the present invention.

[0030] Figure 8 It is the isometric view of an ordinary phase change radiator.

[0031] Figure 9 It is the isometric view of an ordinary radiator.

[0032] In the figure: 1. Heat dissipation bottom plate; 121. First step; 122. Glue filling groove; 123. Second step; 2. Heat dissipation main body; 21. Phase change cavity; 211. Heat conducting column; 212. O-ring; 213. Sealing step; 214. Air extraction screw hole; 216. Wire inlet hole; 221. Longitudinal heat dissipation fin; 222. A transverse heat dissipation fin; 223. B transverse heat dissipation fin; 224. Side ear. Detailed Description of the Invention:

[0033] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0034] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the", and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the", and "under the" second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationship such as "above", "below", "left", and "right" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] Embodiment 1

[0038] As Figures 1 to 5 shown, the module phase change radiator capable of adapting to illumination in all directions of the present invention includes a heat dissipation bottom plate 1 and a heat dissipation main body 2.

[0039] The heat dissipation bottom plate 1 is a high - thermal - conductivity metal plate, the upper surface of which is a surface treated by single - phase powder sintering, and the lower surface is provided with screw holes for fixing the light source.

[0040] The heat dissipation main body 2 is composed of a phase change cavity 21 in the middle of an integral structure, a plurality of longitudinal heat dissipation fins 221 arranged at equal intervals and parallel to each other on both sides of the phase change cavity 21, a plurality of A - type transverse heat dissipation fins 222 arranged at equal intervals and parallel to each other on the top of the phase change cavity 21, and a plurality of B - type transverse heat dissipation fins 223 arranged at equal intervals and parallel to each other on both sides of the phase change cavity 21; the longitudinal heat dissipation fins 221 are wedge - shaped and are perpendicular and cross - each other with the B - type transverse heat dissipation fins 223.

[0041] As Figure 6As shown, the heat dissipation base plate 1 seals the bottom of the phase change cavity 21, and its side has a first step 121 and a second step 123; the first step 121 and the second step 123 are in interference fit with the sealing step 213 at the bottom of the phase change cavity 21, and the groove between the first step 121 and the second step 123 forms a sealant filling groove 122; the first step 121 has a chamfer and is the first sealing step, and the sealant filling groove 122 is used to fill the sealant, and the second step 123 is the second sealing step.

[0042] The top wall of the phase change cavity 21 has an air extraction hole, and the air extraction screw hole 214 is assembled at the air extraction hole and is hermetically connected to the air extraction hole through an O-ring 212; the air extraction screw hole 214 is used to inject the phase change liquid into the heat dissipation cavity and evacuate it, and the O-ring 212 is used to ensure the airtightness of the heat dissipation cavity.

[0043] The side wall of the phase change cavity 21 has a wire inlet hole 216 for passing through the connection wire between the power supply and the light source.

[0044] The outer edge of the longitudinal heat dissipation fin 221 is connected with a side ear 224 for the fixed connection of the radiator and the lamp housing.

[0045] Let the distal width of the longitudinal heat dissipation fin 221 be h 1 , and the proximal width be h 2 , the external height of the phase change cavity be H 1 , the height of the radiator be H 2 , the width of the radiator be W, the number of longitudinal heat dissipation fins 223 be n, and the following relationships should be satisfied for each parameter:

[0046] h 2 > h 1 > H 2 / 6, H 1 ≥ h 2 > H 1 / 2 > H 2 / 4, H 2 - h 2 > H 2 / 2, W / n < 6h 2 / 5

[0047] Embodiment 2

[0048] As Figure 4 , 7 shown, the difference between this embodiment and Embodiment 1 is that: a heat conduction column 211 is provided in the center of the phase change cavity 21, its top is integrally connected to the top wall of the phase change cavity 21, and its bottom is fixedly connected to the heat dissipation base plate 1. The heat conduction column 211 is in the shape of a frustum of a cone or a frustum of a pyramid with a thicker upper part and a thinner lower part, preferably in the shape of a frustum of a cone, and the phase change cavity is preferably in the shape of a square column.

[0049] Let the bottom diameter of the heat-conducting column 211 be r 2 and the top diameter be r 1 . The length and width of the phase-change cavity are both L, and the three preferably satisfy the following relational expressions:

[0050] L / 12 < r 1 < L / 6, 7L < 100r 2 < 100r 1

[0051] The working principle of the present invention:

[0052] There are three ways of heat transfer, namely heat conduction, heat convection, and heat radiation

[0053] Function of heat conduction: First, when the light source works, the light source emits light and heat, and a phase-change reaction starts inside the phase-change cavity. The heat is transferred to the outer wall of the entire phase-change cavity, and the outer wall of the phase-change cavity transfers the heat to the top A horizontal heat-dissipating fin 222 and the vertical heat-dissipating fin 221. The vertical heat-dissipating fin 221 transfers the heat to the B horizontal heat-dissipating fin 223 and the farthest end of the vertical heat-dissipating fin 221

[0054] Function of heat convection: The B horizontal heat-dissipating fin 223 and the vertical heat-dissipating fin 221 intersect to form many heat-dissipating holes. This design can significantly improve the natural convection heat transfer coefficient and enhance the heat-dissipating effect by using the "chimney effect". The chimney effect has the ability to strengthen convection and enhance heat transfer

[0055] Function of heat radiation: The radiator mainly radiates heat to the surrounding space through the A horizontal heat-dissipating fin 222, the B horizontal heat-dissipating fin 223, and the vertical heat-dissipating fin 221

[0056] When the light source is installed on the heat-dissipating bottom plate of the radiator and the light source irradiates downward, the light source transfers the heat to the heat-dissipating bottom plate, and a phase-change reaction occurs in the phase-change cavity. The radiator mainly relies on the heat-dissipating fins for convective heat dissipation, and at this time, the chimney effect can be generated at the heat-dissipating holes

[0057] When the light source is installed on the heat-dissipating bottom plate of the radiator and the light source irradiates to the left, the sintered particles on the upper surface of the heat-dissipating bottom plate absorb the working fluid liquid inside the radiator to the entire heat-dissipating bottom plate surface through capillary action. The heat emitted by the light source is transferred to the heat-dissipating bottom plate to quickly evaporate the working fluid, thereby completing the entire phase-change reaction. At this time, the radiator can rely on the A horizontal heat-dissipating fin 222, the B horizontal heat-dissipating fin 223, and the vertical heat-dissipating fin 221 to generate the chimney effect for heat dissipation, and the effect is equivalent to the effect when the light source of the radiator irradiates downward

[0058] When the light source is installed on the heat-dissipating bottom plate of the radiator and the light source irradiates upward, the light source transfers the heat to the heat-dissipating bottom plate, and then the heat is transferred to the bottom of the phase-change cavity through the heat-conducting column. A phase-change reaction occurs in the phase-change cavity. The radiator mainly relies on the heat-dissipating fins and the heat-dissipating holes for heat dissipation, and at this time, the chimney effect can be generated at the heat-dissipating holes

[0059] Under the conditions that the sizes of the heat conduction columns are different, the phase change cavity is square-column shaped, the ambient temperature is 23 °C, and the light source and power supply have a power of 60 W, the heat dissipation performance tests of the phase change cavity of the simple radiator made of ADC6 material are carried out at different rotation angles. The effect data are shown in Table 1. In the table, vertically upward and vertically downward respectively refer to the two working conditions where the heat dissipation bottom plate 1 is on the top and the heat dissipation bottom plate 1 is on the bottom; vertically left refers to the working condition where the top surface of the phase change cavity faces leftward.

[0060] Table 1

[0061]

[0062] Example 2 at h 1 、h 2 、H 1 、H 2 、W, n are different, and other parameters are the same as those in Table 1. Under the conditions that the ambient temperature is 23 °C and the light source and power supply have a power of 200 W, the heat dissipation performance tests of the radiator made of ADC6 material are carried out at different rotation angles. The effect data are shown in Table 2. In the table, vertically upward and vertically downward respectively refer to the situation where the A transverse heat dissipation fins 222 are vertically downward and vertically upward; vertically left refers to the situation where the A transverse heat dissipation fins 222 face rightward and are perpendicular to the ground.

[0063] Table 2

[0064]

[0065] The effect data of the heat dissipation performance tests of the radiator of the present invention, the ordinary phase change radiator, and the ordinary radiator without a phase change cavity are shown in Table 3. In the table, Examples 2-1 to 2-3 are all radiators with the structure of Example 2 of the present invention, and the light source and power supply have a power of 200 W; Comparative Example 3-1 is an ordinary phase change radiator, and the light source and power supply have a power of 200 W; Comparative Example 3-2 is an ordinary radiator without a phase change cavity, and the light source and power supply have a power of 100 W; vertically upward and vertically downward respectively refer to the situation where the A transverse heat dissipation fins 222 are vertically downward and vertically upward; vertically left refers to the situation where the A transverse heat dissipation fins 222 face rightward and are perpendicular to the ground, rotating 30 degrees downward to the left means that the angle between the longitudinal heat dissipation fins 221 and the horizontal plane is +30 °, and rotating 30 degrees upward to the left means that the angle between the longitudinal heat dissipation fins 221 and the horizontal plane is -30 °.

[0066] Table 3

[0067]

Claims

1. A modular phase-change heat sink capable of adapting to lighting in all directions, comprising a heat dissipation base plate (1) and a heat dissipation body (2); the heat dissipation body comprising a phase-change cavity (21) in the middle of an integrated structure, and a plurality of longitudinal heat dissipation fins (221) at equal intervals and parallel to each other on both sides of the phase-change cavity; the heat dissipation base plate is sealed at the bottom of the phase-change cavity; characterized in that It also includes a plurality of B transverse heat dissipation fins (223) which are equidistant and parallel to each other on both sides of the phase change cavity; the longitudinal heat dissipation fins and the B transverse heat dissipation fins are perpendicularly intersected with each other.

2. The modular phase-change heat sink capable of adapting to lighting in all directions according to claim 1 is characterized in that The upper surface of the heat dissipation base plate is a surface that has been subjected to a single-phase sintering treatment of powder.

3. The modular phase-change heat sink capable of adapting to illumination in all directions according to claim 2 is characterized in that The heat dissipation base plate is a high thermal conductivity metal plate.

4. The modular phase-change heat sink capable of adapting to illumination in all directions according to claim 1, characterized in that The side surface of the heat dissipation base plate has a first step (121) and a second step (123); the first step and the second step are interference-fitted with the sealing step (213) at the bottom of the phase change cavity, and the groove between the first step and the second step constitutes a glue filling groove (122).

5. The modular phase-change heat sink capable of adapting to lighting in all directions according to claim 1, characterized in that The longitudinal heat dissipation fins are wedge-shaped.

6. The modular phase-change heat sink capable of adapting to illumination in all directions according to claim 5, characterized in that The heat dissipation body also includes a plurality of A-shaped transverse heat dissipation fins (222) which are equidistant and parallel to each other at the top of the phase change cavity.

7. The modular phase-change heat sink capable of adapting to illumination in all directions according to claim 6 is characterized in that The distal width of the longitudinal heat dissipation fin is h1, the proximal width is h2, the external height of the phase change cavity is H1, the radiator height is H2, the radiator width is W, and the number of longitudinal heat dissipation fins is n. The parameters should satisfy the following relationship: h2>h1>H2 / 6, H1≥h2>H1 / 2>H2 / 4, H2-h2>H2 / 2, W / n<6h2 / 5.

8. The modular phase-change heat sink capable of adapting to illumination in all directions according to claim 1, characterized in that A heat-conducting column (211) is provided in the center of the phase-change cavity, the top of which is connected to the top wall of the phase-change cavity as an integrated structure, and the bottom of which is sealed and connected to the heat-dissipating bottom plate.

9. The modular phase-change heat sink capable of adapting to illumination in all directions according to claim 8, characterized in that The heat-conducting column is preferably in the shape of a truncated cone that is thick at the top and thin at the bottom, and the phase-change cavity is preferably in the shape of a square column.

10. The modular phase-change heat sink capable of adapting to illumination in all directions according to claim 9 is characterized in that The bottom diameter of the heat-conducting column is r2, the top diameter is r1, and the length and width of the phase change cavity are both L. The three preferably satisfy the following relationship: L / 12<r1<L / 6, 7L<100r2<100r1.

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