CN219861790U - Net-shaped woven structure with capillary action - Google Patents

Abstract

The utility model provides a reticular braiding structure with capillary action, which is applied to a two-phase flow radiating unit and comprises a plurality of warps and wefts, wherein a single weft is matched with a warp group (consisting of at least two warps with the same thickness), and the warps are braided into the reticular braiding structure in a repeated and overlapping (staggered) mode, so that the pore number of the reticular braiding structure is increased, and the reticular braiding structure can have better capillary force and poly (water-containing) characteristic, thereby greatly improving the heat transfer efficiency.

Description

Net-shaped woven structure with capillary action

Technical Field

The present utility model relates to a capillary structure, and more particularly, to a mesh-like woven structure with capillary function for improving capillary heat transfer efficiency by improving better capillary force and poly (water-containing) characteristics.

Background

With rapid progress in the scientific industry, 3C electronic products are now being designed to be light, thin, short and small, so that a heat dissipation unit for dissipating heat or conducting heat therein needs to be relatively thin, and devices utilizing two-phase flow change principle, such as a heat pipe temperature equalizing plate, are paid attention to. However, the heat conductivity of these two-phase flow devices is largely determined by capillary structure.

Referring to fig. 6, taiwan patent No. 201525398A discloses a flat and thin knitted net capillary structure of an ultrathin heat pipe and an ultrathin heat pipe structure thereof, and mainly discloses that the flat and thin knitted net capillary structure 5 comprises a plurality of first knitted wires 51 in a warp direction and a plurality of second knitted wires 52 in a weft direction which are repeatedly and alternately knitted with each other, and two adjacent first knitted wires 51 and two adjacent second knitted wires 52 are surrounded by a mesh. Each knitting wire is provided with a plurality of connecting sections 53 with intervals and a plurality of connecting sections 54 respectively connected in series between any two adjacent connecting sections 53, and the cross section shape of each connecting section 53 of each knitting wire is flat, so that a thinned flat thinned knitting net capillary structure can be obtained.

However, the capillary structure of the conventional knitting type is formed by repeatedly and alternately knitting only the first and second knitting yarns 51, 52, and the diameters (thickness, diameter) thereof are the same, and the mutual cross knitting (staggered) in the warp and weft directions is performed, so that the pore size is fixed, the number of pores and meshes is limited, and the capillary structure is too limited to be flexibly used in the application of capillary force (such as the capillary structure area or local increase of water (poly) content and transverse water absorption property) beyond the single (tone) limitation;

therefore, the existing woven mesh capillary structure only provides the same and limited number of pores and meshes for adsorbing the working fluid, which is insufficient to provide flexible application of the two-phase flow device and can be matched arbitrarily according to the characteristic requirement, so that the water content of the vapor phase device is insufficient, the overall capillary force is poor, and the problems of dry burning (dry-out) and reduced heat transfer efficiency are caused due to insufficient water content or excessive backwater at the evaporation surface of the vapor phase plate.

Therefore, how to solve the problems and the disadvantages of the capillary structure of the woven mesh in the heat dissipation unit is the direction of the improvement of the present inventors and the related industries.

Disclosure of Invention

The main purpose of the present utility model is to provide a mesh-like woven capillary structure formed by weaving a single weft with a warp set of a plurality of warps with the same thickness in a repeated and overlapping (staggered) manner, so as to increase the pore number, so that the mesh-like woven capillary structure has better capillary force and poly (water-containing) property, and further improves the heat transfer efficiency.

In order to achieve the above-mentioned objective, the present utility model provides a mesh-like woven structure with capillary action for use in a two-phase flow heat dissipation unit; characterized by comprising the following steps:

the warp yarn group consists of at least two warp yarns;

a weft thread;

the net-shaped knitting structure is formed by knitting a warp yarn group together with a single weft yarn in a first knitting direction and a second knitting direction in sequence in a repeated and overlapped mode.

The said net-like woven structure with capillary action, wherein: the cross-sectional shape of at least one warp yarn of the warp yarn group is at least one circular cross-section.

The said net-like woven structure with capillary action, wherein: the cross-sectional shape of the at least one weft thread is circular or non-circular.

The said net-like woven structure with capillary action, wherein: the warp and the weft are made of at least one of metal or nonmetal.

The said net-like woven structure with capillary action, wherein: the reticular braided structure is arranged in the two-phase flow radiating unit, the two-phase flow radiating unit comprises an upper plate and a lower plate, the upper plate covers the lower plate to jointly define a cavity filled with working liquid, and the reticular braided structure is arranged on the inner side of the upper plate and/or the lower plate of the cavity.

The said net-like woven structure with capillary action, wherein: the two-phase flow heat dissipation unit is a temperature equalizing plate, a heat pipe or a loop heat pipe.

The said net-like woven structure with capillary action, wherein: each warp in the warp yarn group has the same diameter.

The said net-like woven structure with capillary action, wherein: the mesh-shaped knitting structure is formed by knitting all knitting areas in a repeated and overlapped mode by matching a warp yarn group with a single weft yarn.

A reticular braided structure with capillary action is used in a two-phase flow radiating unit; the method is characterized by comprising the step of knitting a single warp yarn and a single weft yarn in sequence in a repeated and overlapped mode to form the net-shaped knitting structure, wherein:

the local knitting area of the net-shaped knitting structure is knitted by a warp yarn group matched with a single weft yarn, wherein the warp yarn group consists of at least two warp yarns, and the warp yarn group and the single weft yarn are knitted repeatedly and overlapped in sequence in a first knitting direction and a second knitting direction respectively.

The said net-like woven structure with capillary action, wherein: the net-shaped knitting structure is provided with a heat source contact area corresponding to the heat source and a peripheral area surrounding the periphery of the heat source contact area, and the peripheral area is the local knitting area.

The utility model uses a single weft to match with a warp group to weave and combine in a staggered and orderly repeated overlapping mode, can be applied to all or part of the mesh-shaped weaving structure, so that the mesh-shaped weaving structure increases the number of pores, and has better capillary force, poly (water-containing) property and capillary action, and can effectively guide (reflux) the working fluid with directivity, fully diffuse and poly (water-containing) at the evaporation surface of the two-phase flow heat dissipation unit, thereby effectively preventing dry burning of the evaporation surface and improving heat exchange efficiency.

Drawings

Fig. 1 is an exploded perspective view of a two-phase flow heat dissipating unit according to the present utility model.

Fig. 2 is a schematic top view of the mesh woven structure of the utility model.

Fig. 3 is a schematic top view of a woven mesh structure according to an alternative embodiment of the utility model.

Fig. 4 is a schematic side view of the utility model as seen from below in fig. 2.

Fig. 5 is a schematic cross-sectional view of the mesh braid structure of the present utility model disposed within a two-phase flow heat dissipating unit.

Fig. 6 is a schematic side view of a capillary structure of a conventional flat thinned mesh grid.

Reference numerals illustrate: a two-phase flow heat dissipation unit 100; an upper plate 101; a lower plate 102; a chamber 110; a mesh braid structure 200; warp yarn group 2; warp yarn 20; a flow directing microchannel 201; a weft 30; a mesh 4; a heat source contact area 61; a peripheral region 62; an evaporation surface 111; a condensing surface 112; a wire diameter P1; a wire diameter P2; a pore t1; a first braiding direction Y; a second braiding direction X; staggered position a.

Detailed Description

The above objects of the present utility model, as well as the structural and functional characteristics thereof, will be described in terms of the preferred embodiments of the present utility model as illustrated in the accompanying drawings.

The utility model provides a mesh-like knitting structure with capillary action, please refer to fig. 1, 2, 4 and 5, the mesh-like knitting structure 200 is applied in a two-phase flow heat dissipation unit 100 (such as a temperature equalizing plate, a heat pipe, a loop heat pipe or a two-phase flow device), the two-phase flow heat dissipation unit 100 has a housing with a chamber, the housing is selectively described by the temperature equalizing plate, the housing includes an upper plate 101 and a lower plate 102, the upper plate 101 covers the lower plate 102 to jointly define a chamber 110 (such as fig. 5) filled with a working fluid, and the mesh-like knitting structure 200 can be selectively arranged on at least one inner side surface of the upper plate 101 and/or the lower plate 102 of the chamber 110.

The mesh woven structure 200 includes a plurality of warp yarns 20 and weft yarns 30. In this embodiment, in fig. 2 and 4, at least two warp threads 20 are selected as a warp thread group 2 (the number of the warp threads in the group may be two, three, four or more, or other number of the warp threads may be selected, and the warp threads 20 are all of the same diameter (thickness) and are arranged so that the warp thread group 2 is woven in a repeated and overlapping (staggered) manner along a first weaving direction Y (e.g., longitudinal direction) and a single weft thread 30 along a second weaving direction X (e.g., transverse direction) in sequence to form the mesh-like woven structure 200.

In addition, the sum of the diameters P1 of each warp yarn group 2 is smaller than or equal to the diameter P2 of the single weft yarn 30 under the same knitting area, so that the number of warp yarns 20 is increased to construct the mesh knitting structure 200 with more pores t 1. Specifically, referring to fig. 2 and 4, each weft yarn 30 and each two warp yarns 20 of each group are sequentially woven repeatedly and in an overlapping manner to form a plurality of staggered positions a, and a void t1 is formed between each weft yarn 30 and each outer side of each two warp yarns 20 in each staggered position a, so that the number of the voids t1 can be increased.

Therefore, the mesh-type woven structure 200 of the present utility model can be applied to all woven areas or partial woven areas by using a single weft 30 and a warp set 2, so that the mesh-type woven structure 200 can have a larger number of pores, and can have better poly (water-containing) characteristics and capillary action, thereby further improving the capillary force and heat dissipation efficiency of the mesh-type woven structure 200. In practical applications, a user can design the whole or partial position (area) of the mesh-like woven structure 200 to be woven with a group of warp threads 2 (with a plurality of warp threads 20 with the same thickness) according to the type (such as a temperature equalizing plate or a heat pipe) of the two-phase flow heat dissipating unit 100 and/or the requirement of providing more water and capillary action corresponding to the heat source position, and adjust the distance between the warp threads 20 and/or between the weft threads 30 and the weft threads 30, so as to adjust the density of the warp threads 20 and the weft threads 30, and flexibly use the different changes of the number composition between the warp threads 20 and the weft threads 30 to adjust the flow guiding (backflow), water property and capillary effect of the whole or partial position of the mesh-like woven structure 200, thereby further effectively applying the heat dissipating requirement required by each part of the two-phase flow heat dissipating unit 100 with different types.

In addition, the cross-sectional shape of the single weft yarn 30 of the present utility model may be a circular cross-section (e.g., fig. 4) or a non-circular cross-section (e.g., an elliptical cross-section or a flat cross-section or a honeycomb cross-section or any geometric cross-section);

the warp yarns 20 in the warp yarn group 2 may have the same or non-same cross-sectional shape (as shown in fig. 4, which is two circular cross-sections or two non-circular cross-sections or any geometric cross-sections with slightly the same side view from the lower direction in fig. 2), and at least two flow guiding micro-channels 201 are formed between the two warp yarns 20 in the warp yarn group 2 and are respectively located above and below the contact position of the two warp yarns 20 and extend along the length direction of the warp yarns 20.

In addition, the warp yarn 20 and the weft yarn 30 may be made of metal or nonmetal (plastic or stone). That is, the warp yarn 20 and the weft yarn 30 may be made of the same material (or may be made of different materials).

Referring back to fig. 1, 2 and 5, the outer side of the lower plate 102 of the two-phase flow heat dissipating unit 100 is used for contacting a heat source (such as a cpu or a graphics processor or other electronic units; not shown), the inner side thereof forms an evaporation surface 111, and the inner side of the upper plate 101 forms a condensation surface 112 facing the evaporation surface 111. The mesh-like woven structure 200 may be disposed on the evaporation surface 111 of the surface of the lower plate 102 in the present utility model. When the lower plate 102 of the two-phase flow heat dissipating unit 100 absorbs heat from the heat source, the heat is transferred to the evaporation surface 111, so that the liquid working fluid on the evaporation surface 111 evaporates into a gaseous working fluid flowing to the condensation surface. The gaseous working fluid is then condensed into a liquid working fluid by heat exchange between the condensing surface 112 and the outside air. However, the liquid working fluid on the condensation surface 112 can return to the inner side of the lower plate 102 through gravity or other capillary structures, and the utility model makes the two components have different number ratios through the collocation of the single weft thread and the plural warp threads 30 and 20, so that the mesh-shaped knitting structure 200 can have more porous numbers and multiple diversion micro-channels 201 for improving the reflux speed of the working fluid to the evaporation surface 111, and has directional guiding flow so as to be rapidly distributed on the evaporation surface 111, and has better poly (water-containing) characteristic at the area of the evaporation surface 111, thereby preventing the possibility of dry burning. Thus, the boiling evaporation of the working fluid on the evaporation surface 111 and the response speed to temperature are facilitated, and the condensed working fluid on the condensation surface 112 is quickly and continuously returned to the evaporation surface 111 to avoid dry heating, so that the liquid-vapor phase circulation speed of the working fluid in the chamber 110 can be effectively accelerated, and the heat dissipation efficiency is further effectively improved.

As described above, all the knitting areas of the mesh knitting structure 200 of the present embodiment can adopt a knitting mode or pattern of a single weft yarn 30 matched with a warp yarn set 2 (a plurality of warp yarns 20 with the same thickness). However, in an alternative embodiment, referring to fig. 3 and 5, the mesh knitting structure 200 may be knitted by a single warp yarn and a single weft yarn in a conventional manner, and only the partial knitting area of the mesh knitting structure 200 is selected to adopt the knitting mode of the present utility model by a single weft yarn 30 and a group of warp yarn groups 2 (composed of a plurality of warp yarns 20 with the same thickness), while the rest portions are still knitted in a conventional or conventional manner. For example, the mesh-type woven structure 200 has a heat source contact area 61 and a peripheral area 62 corresponding to a heat source, the heat source contact area 61 is located at the center of the mesh-type woven structure 200 and can be woven by sequentially repeating and overlapping (staggered) the single warp yarn 20 and the single weft yarn 30, and the peripheral area 62 is woven by sequentially repeating and overlapping (staggered) the single weft yarn 30 with a warp yarn set 2 according to the present utility model so as to weave around the periphery of the heat source contact area 61. Specifically, the heat source contact area 61 of the mesh-type woven structure 200 is disposed in the chamber 110 of the two-phase flow heat dissipating unit 100 and corresponds to the evaporation surface 111 of the heat source, so that the working fluid adsorbed by the heat source contact area 61 of the mesh-type woven structure 200 can be quickly evaporated after being heated, and the condensed working fluid can be quickly returned by virtue of the better capillary force and the poly (water-containing) property of the peripheral area 62 of the mesh-type woven structure 200, and the poly (water-containing) is located at the periphery of the heat source contact area 61, so that the working fluid is timely provided to the heat source contact area 61 to prevent the evaporation surface 111 from being dry-burned.

Of course, the mesh-like woven structure 200 of the present utility model can be used with a single weft 30 and a set of warp sets 2 in either the heat source contact area 61 or the peripheral area 62 as desired.

In summary, the single weft 30 of the mesh-like woven structure 200 is woven by at least two warp groups 2, which are sequentially and repeatedly overlapped (staggered), so that the number of more pores can be greatly increased under a fixed weaving area, and the warp 20 and the weft 30 can be changed according to the different number of the warp and the weft, so that the mesh-like woven structure 200 has more diversion micro-channels 201, not only can provide the directional guiding and diffusion functions of the working fluid, but also has excellent poly (water-containing) characteristics and capillary action, thereby improving the heat exchange efficiency.

The foregoing detailed description of the utility model has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the utility model in the form disclosed. All equivalent changes and modifications according to the present utility model should be made within the scope of the present utility model.

Claims (10)

1. A reticular braided structure with capillary action, which is used in a two-phase flow radiating unit; characterized by comprising the following steps:

the warp yarn group consists of at least two warp yarns;

a weft thread;

the net-shaped knitting structure is formed by knitting a warp yarn group together with a single weft yarn in a first knitting direction and a second knitting direction in sequence in a repeated and overlapped mode.

2. The wicking mesh-braided structure of claim 1 wherein: the cross-sectional shape of at least one warp yarn of the warp yarn group is at least one circular cross-section.

3. The wicking mesh-braided structure of claim 1 wherein: the cross-sectional shape of the at least one weft thread is circular or non-circular.

4. The wicking mesh-braided structure of claim 1 wherein: the warp and the weft are made of at least one of metal or nonmetal.

5. The wicking mesh-braided structure of claim 1 wherein: the reticular braided structure is arranged in the two-phase flow radiating unit, the two-phase flow radiating unit comprises an upper plate and a lower plate, the upper plate covers the lower plate to jointly define a cavity filled with working liquid, and the reticular braided structure is arranged on the inner side of the upper plate and/or the lower plate of the cavity.

6. The wicking mesh-braided structure of claim 1 wherein: the two-phase flow heat dissipation unit is a temperature equalizing plate or a heat pipe.

7. The wicking mesh-braided structure of claim 1 wherein: each warp in the warp yarn group has the same diameter.

8. The wicking mesh-braided structure of claim 1 wherein: the mesh-shaped knitting structure is formed by knitting all knitting areas in a repeated and overlapped mode by matching a warp yarn group with a single weft yarn.

9. A reticular braided structure with capillary action is used in a two-phase flow radiating unit; the method is characterized by comprising the step of knitting a single warp yarn and a single weft yarn in sequence in a repeated and overlapped mode to form the net-shaped knitting structure, wherein:

the local knitting area of the net-shaped knitting structure is knitted by a warp yarn group matched with a single weft yarn, wherein the warp yarn group consists of at least two warp yarns, and the warp yarn group and the single weft yarn are knitted repeatedly and overlapped in sequence in a first knitting direction and a second knitting direction respectively.

10. The wicking mesh-braided structure of claim 9 wherein: the net-shaped knitting structure is provided with a heat source contact area corresponding to the heat source and a peripheral area surrounding the periphery of the heat source contact area, and the peripheral area is the local knitting area.