Width-increasing micro-groove wick flat heat pipe

Abstract

The utility model relates to a gradually-widened micro-groove wick flat heat pipe which comprises a flat heat pipe body with a containing space and a wick installed in the containing space, and an evaporation end and a condensation end are arranged on the flat heat pipe body. A plurality of arrayed grooves are formed in the liquid absorption core, each groove is provided with a large opening end, a small opening end and two opposite side faces, the large opening ends are opposite to the evaporation ends, the small opening ends are opposite to the condensation ends, and the distance between the two side faces is gradually increased from the small opening ends to the large opening ends. Due to the fact that the sizes of the grooves are gradually increased and widened, capillary gradients are generated in the grooves, large capillary pressure differences exist at the two ends of the grooves, capillary force is improved, the flowing performance of the grooves is improved, phase change circulation is accelerated, and heat dissipation is accelerated. The gradually-widened flat heat pipe with the micro-groove wick is high in working medium phase change speed, high in backflow speed and good in heat dissipation effect.

Description

Technical Field

[0001] The utility model relates to the technical field of heat transfer, mass transfer and heat dissipation, in particular to a gradually widened micro-groove liquid absorption core flat plate heat pipe. Background Art

[0002] With the rapid development of science and technology, the introduction of national intelligent policies, and the increase in market demand, home smart projectors have gradually become an indispensable tool in people's lives. At home, you can watch movies and TV with your family, sing karaoke, and even play games. It is also a good choice to pass the time when camping outdoors.

[0003] However, existing home smart projectors often use air cooling, water cooling or heat pipe methods to dissipate heat. The liquid wick in the heat pipe has a slow phase change speed and a slow reflux speed, which causes the heat generated by the light source in the home smart projector to be unable to dissipate in time, affecting the stability and life of the home smart projector. Utility Model Content

[0004] Based on this, it is necessary to provide a gradually widened micro-groove liquid-absorbing core flat heat pipe with fast working fluid phase change speed, fast reflux speed and good heat dissipation effect to address the heat dissipation problem of home smart projectors.

[0005] A gradually widened micro-groove liquid-absorbing core flat-plate heat pipe comprises: a flat-plate heat pipe body with an accommodating space, and a liquid-absorbing core installed in the accommodating space; the flat-plate heat pipe body is provided with an evaporation end and a condensation end; the liquid-absorbing core is provided with a plurality of grooves arranged in an array, the groove having a large-mouth end, a small-mouth end and two side surfaces arranged oppositely, the large-mouth end is arranged oppositely to the evaporation end, the small-mouth end is arranged oppositely to the condensation end, and the distance between the two side surfaces gradually increases from the small-mouth end to the large-mouth end.

[0006] The above-mentioned gradually widened micro-groove wick flat heat pipe has a plurality of arranged grooves on the wick, and the groove has a large mouth end, a small mouth end and two oppositely arranged sides, the large mouth end is oppositely arranged with the evaporation end, the small mouth end is oppositely arranged with the condensation end, and the distance between the two sides gradually decreases from the large mouth end to the small mouth end. When in use, the evaporation end is connected to the light source (heat source) of the home smart projector, the evaporation end is heated, the liquid in the wick in the flat heat pipe body evaporates, the liquid phase changes to gas, the steam diffuses from the evaporation end to the condensation end, and then condenses and changes to liquid, through the gradually widened grooves in the wick, under the action of capillary force, returns to the evaporation end, thereby completing the heat dissipation. As the size of the groove gradually increases and widens, a capillary gradient is generated inside the groove, and the two ends of the groove have a large capillary pressure difference, which increases the capillary force, thereby improving its flow performance, helping to accelerate the phase change cycle, and accelerating the heat dissipation. The gradually widened micro-groove wick flat heat pipe has a fast working medium phase change speed, a fast reflux speed, and a good heat dissipation effect.

[0007] In one embodiment, the cross section between the two side surfaces is a trumpet shape opening upward from the bottom of the groove.

[0008] In one embodiment, the groove is formed by laser scanning.

[0009] In one embodiment, the side surface and the bottom surface of the groove have a laser cladding layer.

[0010] In one embodiment, the flat heat pipe body includes a first main body section and a second main body section that are connected to each other, and an L-shaped structure is formed between the first main body section and the second main body section.

[0011] In one embodiment, the evaporation end is located at an end of the first main body section away from the second main body section, and the condensation end is located at an end of the second main body section away from the first main body section.

[0012] In one embodiment, the flat heat pipe body includes a first main body section and a second main body section that are connected to each other, and a T-shaped structure is formed between the first main body section and the second main body section.

[0013] In one embodiment, the evaporation end is located at an end of the first main body section away from the second main body section, and the condensation end is located at an end of the second main body section away from the first main body section.

[0014] In one embodiment, the flat heat pipe body includes a first main section, a second main section and a third main section connected in sequence, and an N-type structure is formed between the first main section, the second main section and the third main section.

[0015] In one embodiment, the evaporation end is located at an end of the first main body section away from the second main body section, and the condensation end is located at an end of the third main body section away from the second main body section. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a gradually widened micro-groove liquid-absorbing core flat plate heat pipe of the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of a shape of a wick in a gradually widened micro-groove wick flat plate heat pipe is shown;

[0018] Figure 3 for Figure 2 An enlarged schematic diagram of the circle A in the wick shown;

[0019] Figure 4 for Figure 1The partial schematic diagram of the installation and use of the gradually widened micro-groove wick flat plate heat pipe shown;

[0020] Figure 5 It is a schematic diagram of another embodiment of the utility model of a flat plate heat pipe with a gradually widened micro-groove liquid wick;

[0021] Figure 6 for Figure 5 The partial schematic diagram of the installation and use of the gradually widened micro-groove wick flat plate heat pipe shown;

[0022] Figure 7 It is a schematic diagram of another embodiment of the utility model of a flat plate heat pipe with a gradually widened micro-groove liquid wick;

[0023] Figure 8 for Figure 7 The diagram shown is a partial schematic diagram of the installation and use of the gradually widened micro-groove liquid-wick flat-plate heat pipe. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element in the middle at the same time. In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments, such as "inside", "outside", "left", "right" and similar expressions are only for the purpose of explanation and are not intended to limit the present invention.

[0027] Please refer to Figures 1 to 4, is a schematic diagram of a gradually widened micro-groove liquid-absorbing core flat heat pipe 100 of the utility model, and the gradually widened micro-groove liquid-absorbing core flat heat pipe 100 comprises: a flat heat pipe body 20 having an accommodation space (not shown), and a liquid-absorbing core 30 installed in the accommodation space. The flat heat pipe body 20 is provided with an evaporation end 21 and a condensation end 22, and the liquid-absorbing core 30 is provided with a plurality of grooves 31 arranged in an array, and the groove 31 has a large end 32, a small end 33, and two oppositely arranged side surfaces 34, the large end 32 is arranged opposite to the evaporation end 21, the small end 33 is arranged opposite to the condensation end 22, and the distance between the two side surfaces 34 gradually increases from the small end 33 to the large end 32.

[0028] Furthermore, the cross section between the two side surfaces is a trumpet shape opening upward from the bottom of the groove 31, wherein the groove 31 is processed by laser scanning, and the side 34 and bottom 35 of the groove 31 have a laser cladding layer 36. During processing, a single laser beam performs a V-shaped scan on the surface of the workpiece, and by adjusting the laser spot spacing, the scanning path forms a gradually widening groove 31. This structure changes the morphology and size of the groove 31 and realizes a continuous change in the cross section. In addition, the heat accumulation and instantaneous evaporation during the laser scanning process cause a certain degree of melting and vaporization on the surface of the workpiece, forming a laser cladding layer 36 with excellent performance. This process improves the physical and chemical properties of the workpiece surface, and improves the performance in terms of wear resistance, corrosion resistance and fatigue resistance. The overlapping areas of the laser spots are of different sizes, resulting in a gradual increase in the width of the groove 31, while the tiny particles are distributed on the surface of the groove 31, which improves the hydrophilicity. This unique structure greatly enhances the capillary force and helps to accelerate the flow of the working fluid.

[0029] In this embodiment, the flat heat pipe body 20 includes a first main body section 23 and a second main body section 24 connected to each other, and an L-shaped structure is formed between the first main body section 23 and the second main body section 24. The evaporation end 21 is located at one end of the first main body section 23 away from the second main body section 24, and the condensation end 22 is located at one end of the second main body section 24 away from the first main body section 23. When using, please refer to Figure 4 The evaporation end 21 of the flat heat pipe body 20 is connected to the light source 210 of the home smart projector 200, and a cooling fan 220 is installed next to it, which then cooperates with the low-speed cooling fan 220 to form a better cooling system for the home smart projector 200, solving the problems of low heat dissipation efficiency, and then solving the problems of high noise and low power.

[0030] The liquid wick 30 is relatively small in size and highly plastic, and can be made not only into the L-shaped structure mentioned above, but also into T-shaped, Z-shaped structures, etc., so as to make flat-plate heat pipe bodies 20 of different shapes to adapt to the complex and changeable internal environments of different household smart projectors.

[0031] Please refer to Figure 5 and Figure 6 , is a schematic diagram of another embodiment of a gradually widened micro-groove liquid-absorbing core flat heat pipe 100. In this embodiment, the flat heat pipe body 20 includes a first main body section 23 and a second main body section 24 connected to each other, and a T-shaped structure is formed between the first main body section 23 and the second main body section 24. Among them, the evaporation end 21 is located at the end of the first main body section 23 away from the second main body section 24, and the condensation end 22 is located at the end of the second main body section 24 away from the first main body section 23. When using, please refer to Figure 6 The evaporation end 21 of the flat heat pipe body 20 is connected to the light source 210 of the home smart projector 200, and a cooling fan 220 is installed next to it, which then cooperates with the low-speed cooling fan 220 to form a better cooling system for the home smart projector 200, solving the problems of low heat dissipation efficiency, and then solving the problems of high noise and low power.

[0032] Please refer to Figure 7 and Figure 8 , is a schematic diagram of another embodiment of a gradually widened micro-groove liquid-absorbing core flat heat pipe 100. In this embodiment, the flat heat pipe body 20 includes a first main body section 23, a second main body section 24 and a third main body section 25 connected in sequence, and an N-type structure is formed between the first main body section 23, the second main body section 24 and the third main body section 25. Among them, the evaporation end 21 is located at the end of the first main body section 23 away from the second main body section 24, and the condensation end 22 is located at the end of the third main body section 25 away from the second main body section 24. Please refer to Figure 8 The evaporation end 21 of the flat heat pipe body 20 is connected to the light source 210 of the home smart projector 200, and a cooling fan 220 is installed next to it, which then cooperates with the low-speed cooling fan 220 to form a better cooling system for the home smart projector 200, solving the problems of low heat dissipation efficiency, and then solving the problems of high noise and low power.

[0033] The above-mentioned gradually widened micro-groove liquid-absorbing core flat heat pipe 100 has a plurality of arranged grooves 31 on the liquid-absorbing core 30, and the groove 31 has a large end 32, a small end 33 and two oppositely arranged side surfaces 34, the large end 32 is arranged opposite to the evaporation end 21, the small end 33 is arranged opposite to the condensation end 22, and the distance between the two side surfaces gradually decreases from the large end 32 to the small end 33. When in use, the evaporation end 21 is connected to the light source 210 (heat source) of the home smart projector 200, the evaporation end 21 is heated, the liquid of the liquid-absorbing core 30 in the flat heat pipe body 20 evaporates, the liquid phase changes to gaseous state, the vapor diffuses from the evaporation end 21 to the condensation end 22, and then condenses to liquid, and returns to the evaporation end 21 under the action of capillary force through the gradually widened grooves 31 in the liquid-absorbing core 30, thereby completing the heat dissipation. As the size of the groove 31 gradually increases and widens, a capillary gradient is generated inside the groove 31, and there is a large capillary pressure difference at both ends of the groove 31, which improves the capillary force, thereby improving its flow performance, helping to accelerate the phase change cycle and speeding up the heat dissipation. The gradually widening micro-groove liquid-absorbing core flat heat pipe 100 has a fast working medium phase change speed, a fast reflux speed, and a good heat dissipation effect.

[0034] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A gradually widened micro-groove liquid wick flat plate heat pipe, characterized in that: include: A flat heat pipe body with an accommodating space and a liquid wick installed in the accommodating space; the flat heat pipe body is provided with an evaporating end and a condensing end; the liquid wick is provided with a plurality of arranged grooves, the groove having a large end, a small end and two oppositely arranged side surfaces, the large end is arranged opposite to the evaporating end, the small end is arranged opposite to the condensing end, and the distance between the two side surfaces gradually increases from the small end to the large end.

2. The gradually widened micro-groove liquid wick flat plate heat pipe according to claim 1, characterized in that: The cross section between the two side surfaces is in a trumpet shape opening upward from the bottom of the groove.

3. The gradually widened micro-groove liquid wick flat plate heat pipe according to claim 1, characterized in that: The groove is formed by laser scanning.

4. The gradually widened micro-groove liquid wick flat plate heat pipe according to claim 3, characterized in that: The side surfaces and the bottom surface of the groove are provided with laser cladding layers.

5. The gradually widened micro-groove liquid wick flat plate heat pipe according to claim 1, characterized in that: The flat heat pipe body includes a first main body section and a second main body section that are connected to each other, and an L-shaped structure is formed between the first main body section and the second main body section.

6. The gradually widened micro-groove liquid wick flat plate heat pipe according to claim 5, characterized in that: The evaporation end is located on an end of the first main body section away from the second main body section, and the condensation end is located on an end of the second main body section away from the first main body section.

7. The gradually widened micro-groove liquid wick flat plate heat pipe according to claim 1, characterized in that: The flat heat pipe body includes a first main body section and a second main body section that are connected to each other, and a T-shaped structure is formed between the first main body section and the second main body section.

8. The gradually widened micro-groove liquid wick flat plate heat pipe according to claim 7, characterized in that: The evaporation end is located on an end of the first main body section away from the second main body section, and the condensation end is located on an end of the second main body section away from the first main body section.

9. The gradually widened micro-groove liquid wick flat plate heat pipe according to claim 1, characterized in that: The flat heat pipe body comprises a first main body section, a second main body section and a third main body section which are connected in sequence, and an N-type structure is formed between the first main body section, the second main body section and the third main body section.

10. The gradually widened micro-groove liquid wick flat plate heat pipe according to claim 9, characterized in that: The evaporation end is located at an end of the first main body section away from the second main body section, and the condensation end is located at an end of the third main body section away from the second main body section.

Images