CN213840857U

CN213840857U - Liquid cooling lamp

Info

Publication number: CN213840857U
Application number: CN202023180181.0U
Authority: CN
Inventors: 皮远军; 康伟; 任朝晖
Original assignee: Zopoise Technology Zhuzhou Co Ltd
Current assignee: Zopoise Technology Zhuzhou Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-07-30
Anticipated expiration: 2030-12-25

Abstract

The application relates to the technical field of lighting equipment, and provides a liquid cooling lamp which comprises a radiator and a light source module arranged on the radiator; the heat sink includes: the heat dissipation part comprises a first heat conduction part and a second heat conduction part, wherein the first heat conduction part is in contact with the light source module; the radiator is internally provided with a circulating channel, the circulating channel is used for filling cooling circulating liquid, and the circulating channel sequentially passes through the first heat-conducting part, the second heat-conducting part and the heat-radiating part and returns to the first heat-conducting part. The liquid cooling lamp provided by the application utilizes the phase change of the temperature difference and the cooling circulation liquid to improve the heat dissipation efficiency, can obtain a better heat dissipation effect, and further ensures the service life of the lamp.

Description

Liquid cooling lamp

Technical Field

The application relates to the field of lighting equipment, in particular to a liquid cooling lamp.

Background

In the process of converting electric energy into light energy, the LED lamp is easy to heat. In order to ensure that the lamp can work normally, a heat dissipation structure is usually arranged on the LED lamp.

In the prior art, fins are usually used for physical heat dissipation, and the fins are generally mounted on the thermal contact portion and are made of metal with good thermal conductivity. When the LED lamp heats, the heat of the thermal contact part is transferred to the fins, and the sheet structures of the fins can increase the contact area between the fins and the air, so that the purpose of heat dissipation is achieved.

However, when the LED lamp is operated for a long time, the heat dissipation effect of the fins is not ideal. The continuous heat generation causes the heat of the thermal contact portion to be continuously conducted to the fins, and even if a plurality of fins are provided, the heat cannot be sufficiently transferred to the air. The temperature of the fins does not change along with the change of the heat energy transferred to the fins due to the large accumulation of heat, the heat is accumulated in the lamp, the normal work of components such as a light source and the like can be influenced by the high temperature, and the service life of the lamp is shortened. Especially, when a small lamp body is used for manufacturing a high-power floodlight, the lamp bead is often seriously degraded in light due to insufficient heat dissipation and cannot work normally.

Disclosure of Invention

In order to solve the above problems or at least partially solve the above technical problems, a liquid-cooled lamp is provided, including:

the light source module comprises a radiator and a light source module arranged on the radiator;

the heat sink includes: the heat dissipation part comprises a first heat conduction part and a second heat conduction part which are in contact with the light source module, wherein the heat dissipation speed of the first heat conduction part is higher than that of the second heat conduction part;

the radiator is characterized in that a circulating channel is arranged in the radiator and used for filling cooling circulating liquid, and the circulating channel sequentially passes through the first heat-conducting part, the second heat-conducting part and the radiating part and returns to the first heat-conducting part.

Optionally, a thickness of the first heat conduction portion is less than a thickness of the second heat conduction portion.

Optionally, the first heat conduction part and the second heat conduction part are made of two materials with different thermal conductivities, wherein the thermal conductivity of the first heat conduction part is larger than that of the second heat conduction part;

alternatively, the surface area of the first heat conduction portion is larger than that of the second heat conduction portion.

Optionally, the light source module has a back plate, the portions of the first heat conducting portion and the second heat conducting portion, which are in contact with the light source module, together form a plane, and the back plate is tightly attached to the plane.

Optionally, the circulation channel of the heat sink is partially disposed around the periphery of the back plate.

Optionally, the heat dissipation part includes a box body, a first heat pipe and a second heat pipe, one end of the first heat pipe is connected to the first heat conduction part, and the other end of the first heat pipe is connected to the box body; one end of the second heat pipe is connected with the second heat conducting part, and the other end of the second heat pipe is connected with the box body;

a cavity is arranged in the box body and forms a part of the circulating channel.

Optionally, a volume of the cavity on a side close to the first heat pipe is larger than a volume of the cavity on a side close to the second heat pipe.

Optionally, an inner width of at least a portion of the cavity is gradually reduced from a side close to the first heat pipe to a side close to the second heat pipe.

Optionally, the first heat pipe is provided with heat dissipation fins; and/or one side of the box body close to the first heat pipe is provided with a heat radiation fin.

Optionally, the liquid-cooled lamp further comprises a bracket, and the bracket is connected to the radiator; when the support supports the radiator, the first heat conduction part is positioned above the second heat conduction part.

Compared with the prior art, the heat dissipation speed of the first heat conduction part is higher than that of the second heat conduction part, so that the temperature difference of fluid in contact with the first heat conduction part can be generated, the fluid is driven to flow from the direction of the second heat conduction part to the direction of the first heat conduction part, and further enters the heat dissipation part through phase change conversion, and phase change circulation is obtained. This application utilizes the evaporation and the condensation process of cooling circulation liquid to shift and derive the heat, compares and has possessed better radiating effect in single solid state radiator, has prolonged the life of lamps and lanterns.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be clear that the drawings in the following description are only intended to illustrate some embodiments of the present application, and that for a person skilled in the art, it is possible to derive from these drawings, without inventive effort, technical features, connections or even method steps not mentioned in the other drawings.

FIG. 1 is a perspective view of a liquid cooled lamp of the present application;

FIG. 2 is an exploded view of the liquid-cooled lamp of the present application as viewed from the side of the lamp housing;

FIG. 3 is an exploded view of the liquid cooled lamp of the present application as viewed from the cover side;

FIG. 4 is a schematic longitudinal cross-sectional view of a liquid-cooled lamp of the present application.

Description of the reference numerals

1-a radiator; 11-a heat-dissipating portion; 111-a cartridge; 111 a-cavity; 112-a first heat pipe; 113-a second heat pipe; 12-a first heat conducting portion; 13-a second heat conducting portion; 14-a circulation channel; 2-a light source module; 3-a back plate; 4-radiating fins; 5-a bracket; 6-lamp body; 7-cover plate; 71-liquid injection port.

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. 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 application.

The inventor of the invention finds that in the prior art, for a lamp with larger heat productivity, the adopted fins can not fully radiate heat, and the normal work of the lamp is influenced.

In order to solve the above problems or at least partially solve the above technical problems, the present application provides a liquid-cooled lamp, as shown in fig. 1 to 4, including a heat sink 1 and a light source module 2 mounted on the heat sink 1; the heat sink 1 includes: the heat dissipation part 11, the first heat conduction part 12 and the second heat conduction part 13 are in contact with the light source module 2, wherein the heat dissipation speed of the first heat conduction part 12 is higher than that of the second heat conduction part 13; the heat sink 1 has a circulation passage 14 inside, the circulation passage 14 is used for filling cooling circulation liquid, and the circulation passage 14 passes through the first heat conduction part 12, the second heat conduction part 13, and the heat dissipation part 11 in this order, and returns to the first heat conduction part 12.

Compared with the method adopting water as a heat dissipation driving agent, the cooling circulating liquid is more sensitive to temperature change, can perform phase change at a slightly higher temperature, dissipates heat in the conversion of a gas phase and a liquid phase, and improves the heat dissipation efficiency. The cooling circulation fluid may fill the circulation channel 14, and the material may be a mixture of alcohol and water, or an air conditioning refrigerant or a derivative thereof, and the specific choice thereof is not limited in this application. Preferably, the cooling circulation liquid may be a mixture of 75% alcohol and water.

When the lamp works, the light source module 2 emits light and generates heat, and the heat can be transferred to the radiator 1. Since the heat sink 1 can contact with air, heat can be transferred from the lamp with higher temperature to the air through the heat sink 1, and heat dissipation of the lamp is further achieved.

Specifically, referring to fig. 4, the heat of the light source module 2 can be transferred to the first heat conduction part 12 and the second heat conduction part 13, and when the temperature of the lamp is low, the first heat conduction part 12 and the second heat conduction part 13 can transfer the heat to the cooling circulation liquid in contact therewith, thereby releasing the heat. The temperature of the cooling circulation fluid near the first heat transfer part 12 is lower than that of the cooling circulation fluid near the second heat transfer part 13, so that a temperature difference can be formed between the cooling circulation fluids, and convection can occur due to expansion and contraction. The cooling circulation liquid can be changed into different phases according to the temperature, and when the evaporation temperature of the cooling circulation liquid is reached, the cooling circulation liquid starts to evaporate into a gaseous state. The density of the gas is low and therefore the gas will rise above the circulation channel 14 after evaporation, leaving liquid below. As the cooling circulation fluid is evaporated, the gaseous cooling circulation fluid exchanges heat with the outside through the heat radiating portion 11 along the circulation passage 14 and is cooled. After cooling, the temperature of the gaseous cooling circulation liquid is reduced and the gaseous cooling circulation liquid is condensed into a liquid state again. Under the action of gravity, the cooling circulation liquid returning to the liquid state flows back to the portion of the circulation passage 14 corresponding to the second heat transfer portion 13, and circulates.

Since the heat dissipation speed of the first heat conduction portion 12 is faster than that of the second heat conduction portion 13, the temperature of the first heat conduction portion 12 is lower than that of the second heat conduction portion 13, and the fluid can be driven to flow from a high-temperature area of the circulation channel 14 close to the second heat conduction portion 13 to a low-temperature area of the circulation channel 14 close to the first heat conduction portion 12, so that the effects of accelerating convection and fully dissipating heat are achieved.

Compared with the heat conduction parts with the same heat dissipation speed in the prior art, the heat dissipation speed of the first heat conduction part 12 is higher than that of the second heat conduction part 13, so that the temperature difference of the fluid in contact with the first heat conduction part can be generated, the fluid is driven to flow from the direction of the second heat conduction part 13 to the direction of the first heat conduction part 12, and further, the fluid enters the heat dissipation part 11 through phase change conversion, and phase change circulation is obtained. This application utilizes the evaporation and the condensation process of cooling circulation liquid to shift and derive the heat, compares and has possessed better radiating effect in single solid state radiator, has prolonged the life of lamps and lanterns.

In actual use, the center of gravity of the first heat transfer portion 12 may be placed above the second heat transfer portion 13 to ensure that fluid can flow from the second heat transfer portion 13 to the first heat transfer portion 12. Specifically, the liquid-cooled lamp can comprise a bracket 5, wherein the bracket 5 is connected to the radiator 1; when the bracket 5 supports the heat sink 1, the first heat conduction portion 12 is located above the second heat conduction portion 13.

In the present application, the first heat conduction portion 12 may dissipate heat faster than the second heat conduction portion 13 in various ways. For example, the thickness of the first heat conduction portion 12 may be smaller than the thickness of the second heat conduction portion 13. When the heat dissipation areas of the first heat conduction part 12 and the second heat conduction part 13 are the same, the first heat conduction part 12 dissipates heat faster and the temperature of the first heat conduction part 12 is lower than that of the second heat conduction part 13 because the thickness of the first heat conduction part 12 is relatively smaller and the accumulated heat is less.

Alternatively, two materials having different thermal conductivities may be used for the first heat conduction portion 12 and the second heat conduction portion 13, where the thermal conductivity of the first heat conduction portion 12 is greater than that of the second heat conduction portion 13. An object having a large thermal conductivity is an excellent thermal conductor, and therefore the first heat conduction portion 12 dissipates heat faster, and the temperature of the first heat conduction portion 12 will be lower than that of the second heat conduction portion 13. Preferably, the first heat conduction portion 12 may be made of copper, and the second heat conduction portion 13 may be made of aluminum; of course, the first heat conduction part 12 may be made of a metal material having a large thermal conductivity, such as copper and aluminum, and the second heat conduction part 13 may be made of a material having a small thermal conductivity, such as an alloy and ceramic, to ensure a heat dissipation effect.

Alternatively, the surface area of the first heat conduction portion 12 may be larger than that of the second heat conduction portion 13. Specifically, the first heat conducting portion 12 may be provided with fins, and the fins can increase the heat dissipation area, so that the heat dissipation speed of the first heat conducting portion 12 is faster than that of the second heat conducting portion 13.

In addition, in the present application, the light source module 2 may have the back plate 3, the portions of the first heat conduction portion 12 and the second heat conduction portion 13 contacting the light source module 2 may form a plane together, and the back plate 3 is closely attached to the plane. Wherein, the back plate 3 can be a straight structure as shown in fig. 4, and the assembly is simple; the back plate 3 may have an arc-shaped structure, and the surface area of the arc-shaped structure is larger for the back plate 3 having the same circumference, so that the areas of the portions of the first heat conduction portion 12 and the second heat conduction portion 13 contacting the light source module 2 are increased, which contributes to heat transfer.

One part of the heat of the light source module 2 is released to the air through the lampshade, and the other part is transmitted to the back plate 3 inwards. The back plate 3 can transfer heat to the first heat transfer portion 12 and the second heat transfer portion 13, and release the heat through the cooling circulation liquid in the circulation passage 14.

In order to further enlarge the heat dissipation area and improve the heat dissipation efficiency, the circulation channel 14 of the heat sink 1 may be partially disposed around the outer circumference of the back plate 3. The periphery of backplate 3 is provided with circulation channel 14, therefore the heat in backplate 3 periphery can be released fast through the cooling circulation liquid in circulation channel 14, and the heat in backplate 3 center can be to backplate 3 transmission all around, perhaps, the heat in backplate 3 center also can be to first heat conduction portion 12 and the transmission of second heat conduction portion 13, releases through the evaporation-condensation's of the cooling circulation liquid in circulation channel 14 cycle process.

In the present application, the heat dissipation part 11 may include a case 111, a first heat pipe 112, and a second heat pipe 113, and one end of the first heat pipe 112 may be connected to the first heat conduction part 12 and the other end is connected to the case 111; one end of the second heat pipe 113 may be connected to the second heat conduction part 13, and the other end is connected to the case 111; the cassette 111 has a chamber 111a therein, and the chamber 111a constitutes a part of the circulation path 14. The first heat pipe 112 and the second heat pipe 113 have a large contact area with air, so that heat can be better released through the first heat pipe 112 and the second heat pipe 113.

In the present application, the cooling circulation fluid may flow through the first heat pipe 112, the case 111, the second heat pipe 113, and the circulation passage 14 at the outer periphery of the back plate 3. In order to increase the contact area and improve the heat dissipation effect, a cooling circulation fluid passage may be provided between the first heat conduction part 12, the second heat conduction part 13, and the case 111, and the cooling circulation fluid passage may constitute a part of the circulation passage 14 of the heat sink 1. Even more, it is also possible to provide a pipe inside the first heat transfer portion 12 and the second heat transfer portion 13 and to access the circulation passage 14, thereby further improving the heat transfer efficiency.

The cooling circulation liquid is evaporated at a high temperature at a position of the circulation channel 14 corresponding to the first heat conduction part 12 to be converted into a gaseous state, then enters the first heat pipe 112 along the circulation channel 14, is condensed into a liquid state at the first heat pipe 112 due to heat loss, flows into the box body 111 under the influence of gravity, continues to pass through the second heat pipe 113, and returns to a position of the circulation channel 14 corresponding to the second heat conduction part 13. Preferably, the first heat pipe 112 and the second heat pipe 113 may be provided in plurality to increase a heat dissipation area and improve heat dissipation efficiency.

It is worth mentioning that, the box body 111 and the light source module 2 of this application are designed separately, can further enlarge the cooling circulation liquid in the different position's of circulating channel 14 difference in temperature. Specifically, the first heat pipe 112 can cool down the cooling circulation liquid in the gaseous state in the first heat pipe 112 through heat transfer with air and condense the cooling circulation liquid into the liquid state, and the heat of the cooling circulation liquid in the second heat pipe 113 is further released, so that the temperature of the returned cooling circulation liquid can be further lowered. Therefore, self convection can be accelerated by the higher temperature difference of the cooling circulating liquid at different positions, heat can be fully released, the heat dissipation effect is improved, and the service life of the lamp is further ensured.

Preferably, as shown in fig. 3, the first heat pipe 112 may be provided with a heat sink fin 4 thereon. The radiator fins 4 have excellent heat conductivity and have a large area in contact with air, thereby efficiently radiating heat.

And/or, the side of the box 111 close to the first heat pipe 112 may also be provided with heat dissipation fins 4. Through a plurality of heat radiation fins 4 arranged in multiple directions, a larger heat radiation surface area is provided, and the heat radiation efficiency is improved.

In addition, in order to prevent the cooling circulation fluid from forming a cold area at the position of the circulation channel 14 corresponding to the second heat conduction part 13 due to too fast heat dissipation, and thus affecting the heat dissipation circulation, the second heat pipe 113 may not be provided with the heat dissipation fins 4.

Preferably, referring to fig. 4, the volume of the chamber 111a on the side close to the first heat pipe 112 is greater than the volume of the chamber 111a on the side close to the second heat pipe 113. The cooling circulation fluid flows from a high temperature to a low temperature along the circulation passage 14, passes through the second heat pipe 113, the first heat pipe 112, the case 111, and the second heat pipe 113 in this order, and returns to the second heat transfer portion 13. According to the bernoulli equation, since the volume of the chamber 111a on the side close to the first heat pipe 112 is larger than the volume of the chamber 111a on the side close to the second heat pipe 113, the flow velocity of the fluid becomes smaller and the pressure applied thereto becomes larger. The fluid is driven by pressure and gravity and can naturally flow downwards. Accordingly, the fluid in the circulation channel 14 near the first heat conduction portion 12 and the second heat conduction portion 13 at the periphery of the back plate 3 can flow upward, and the fluid in the cavity 111a can flow downward, so that a circulation flow is formed, heat can be sufficiently transferred, and a heat dissipation effect is improved.

More preferably, as shown in fig. 4, the inner width a of at least a portion of the cavity 111a may gradually decrease from the side near the first heat pipe 112 to the side near the second heat pipe 113. The reduction of the inner width a enables the volume of the cavity 111a on the side close to the first heat pipe 112 to be larger than the volume of the cavity 111a on the side close to the second heat pipe 113. Since the inner width a gradually decreases from the side close to the first heat pipe 112 to the side close to the second heat pipe 113, α > 90 °, compared to the case where α is 90 °, the present application can promote the fluid to flow downward more smoothly, and prevent local heat accumulation due to accumulation of the fluid at a right angle.

In addition, when the first heat pipe 112 and the second heat pipe 113 are manufactured, in order to prevent the deformation of the pipe and the heat dissipation fins 4 during the pipe bending process, the first heat pipe 112 and the second heat pipe 113 may be filled with river sand in advance, then both ends of the pipe may be closed, and after heating, the pipe may be rolled and bent to a desired shape by using a pipe bending machine.

During actual assembly, the light source module 2 can be fastened on the lamp body 6 through the M3 screw, after the three-core rubber wire is installed, one end of the first heat pipe 112 is sequentially installed in a corresponding hole on the lamp body 6, and the other end of the first heat pipe 112 is sequentially connected with a preset hole on the box body 111, wherein the first heat pipe 112 can be connected with the lamp body 6 and the box body 111 through double-pipe rubber. The second heat pipe 113 may be connected to the lamp body 6 in the same manner. This application compact structure, convenient assembling.

The heat sink 1 is connected to the cover plate 7 by a sealant, and the cover plate 7 is further fixed to the heat sink 1 by M4 screws. In actual use, the cooling circulation liquid can be injected by opening the liquid injection port 71 on the cover plate 7, 75% alcohol and water can be blended according to the proportion of 1: 2, then the cavity 111a is filled from the screw hole of the M6 on the liquid injection port 71, and in order to ensure the sealing performance, a sealing ring can be sleeved on the M6 screw and then connected with the screw hole on the back plate 3.

It is to be understood that the terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only, and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a" and "an" typically include at least two, but do not exclude the presence of at least one.

It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present application to describe certain components, these components should not be limited by these terms. These terms are only used to distinguish one component from another. For example, a first certain component may also be referred to as a second certain component, and similarly, a second certain component may also be referred to as a first certain component without departing from the scope of embodiments herein.

In the embodiments of the present application, "substantially equal to", "substantially perpendicular", "substantially symmetrical", and the like mean that the macroscopic size or relative positional relationship between the two features referred to is very close to the stated relationship. However, it is clear to those skilled in the art that the positional relationship of the object is difficult to be exactly constrained at small scale or even at microscopic angles due to the existence of objective factors such as errors, tolerances, etc. Therefore, even if a slight point error exists in the size and position relationship between the two, the technical effect of the present application is not greatly affected.

It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.

Finally, it should be noted that those skilled in the art will appreciate that embodiments of the present application present many technical details for the purpose of enabling the reader to better understand the present application. However, the technical solutions claimed in the claims of the present application can be basically implemented without these technical details and various changes and modifications based on the above-described embodiments. Accordingly, in actual practice, various changes in form and detail may be made to the above-described embodiments without departing from the spirit and scope of the present application.

Claims

1. A liquid cooled light fixture, comprising:

2. The liquid cooled lamp of claim 1 wherein the thickness of said first heat conducting portion is less than the thickness of said second heat conducting portion.

3. The liquid-cooled lamp of claim 1 wherein the first and second heat conducting portions are formed of two materials having different thermal conductivities, wherein the thermal conductivity of the first heat conducting portion is greater than the thermal conductivity of the second heat conducting portion;

4. The liquid-cooled lamp of claim 1, wherein the light source module has a back plate, the first and second heat-conducting portions together form a plane, and the back plate is tightly attached to the plane.

5. The liquid cooled lamp of claim 4 wherein the circulation path of the heat sink is partially disposed around the periphery of the back plate.

6. The liquid-cooled lamp of any one of claims 1 to 5, wherein the heat sink comprises a case, a first heat pipe and a second heat pipe, one end of the first heat pipe is connected to the first heat conducting portion, and the other end of the first heat pipe is connected to the case; one end of the second heat pipe is connected with the second heat conducting part, and the other end of the second heat pipe is connected with the box body;

7. The liquid cooled lamp of claim 6 wherein the volume of the chamber on the side of the chamber adjacent the first heat pipe is greater than the volume of the chamber on the side of the chamber adjacent the second heat pipe.

8. The liquid cooled lamp of claim 7 wherein at least a portion of said chamber has an inner width that decreases from a side adjacent said first heat pipe to a side adjacent said second heat pipe.

9. The liquid-cooled lamp of claim 6 wherein the first heat pipe has heat dissipating fins disposed thereon; and/or one side of the box body close to the first heat pipe is provided with a heat radiation fin.

10. A liquid cooled lamp according to any one of claims 1 to 5 further comprising a bracket, said bracket being connected to said heat sink; when the support supports the radiator, the first heat conduction part is positioned above the second heat conduction part.