CN115691936A - Heat dissipation coil based on phase-change material - Google Patents

Abstract

The application relates to a heat dissipation coil based on phase change material, it includes: an insulating framework; the insulating baffle plates are arranged at two ends of the insulating framework to form a space for winding a coil; a plurality of mounting grooves are formed in the axial outer side of the insulating baffle; and the heat dissipation shell is arranged in the mounting groove and is internally packaged with a phase change material. The heat dissipation shell is placed in the groove formed in the insulating baffle, the phase change material is filled in the heat dissipation shell, the heat generated by the coil during working is transmitted to the interior of the heat dissipation shell, when the phase change temperature of the phase change material is reached, the heat absorption characteristic of the phase change material in the phase change conversion process dissipates heat of the coil, and when the coil is finished, the heat release characteristic of the phase change material in the phase change conversion process is changed into the initial state again. The heat dissipation shell is matched with the phase-change material in the heat dissipation shell for heat dissipation, the overall structural strength is guaranteed, and the heat dissipation shell is prevented from being deformed or even damaged due to overlarge axial electromagnetic force of the coil. Compared with the traditional coil water-cooling heat dissipation structure, the coil water-cooling heat dissipation structure is simpler and more compact, and has high cost performance.

Description

Heat dissipation coil based on phase-change material

Technical Field

The application relates to the field of pulse power coils, in particular to a phase-change material-based heat dissipation coil.

Background

The performance of the pulse power coil is directly related to the working efficiency of equipment, for example, the coil used in a pulse strong magnetic field must meet the requirements of high strength, small temperature rise and concentrated magnetic field, while the coil in the coil emitter firstly meets the characteristics of high strength and concentrated magnetic field, and the temperature rise requirement is relatively small. Although the selection of superior materials for coil optimization is also one method of improving coil performance, prior to this time, improvements in coil fabrication processes and methods have had a greater role and should be considered first.

The traditional coil winding method is simple and direct, namely, the coil is tightly wound from one end of the fixing device, one layer of the coil is wound and is directly wound back in the opposite direction, and the like is carried out until the winding is finished. Such a structure causes many problems: because a single coil is adopted to wind the coil, the current distribution of the whole coil is basically uniform, but the more the number of layers wound by the coil is, the more difficult the heat dissipation of the inner coil is, so that the internal temperature rise of the coil is too high, and the internal temperature rise of the coil is slowly reduced under the continuous pulse discharge work, so that the insulation damage of the coil is easily caused; the pulse transmitting coil is generally electrified with large current to generate a strong magnetic field, so that the required requirements are met, but the temperature rise of the coil is increased while the strong magnetic field is generated, so that the temperature of the whole coil is too high, the coil is subjected to fatigue damage, and the service life of the coil is shortened.

In some related technologies, a method for rapidly dissipating heat of a coil is to open a hole at one end of the coil, then penetrate through the whole coil, and introduce a cooling liquid into the hole to rapidly cool the coil, but the following problems exist:

the method needs to add special water cooling equipment, has a complex structure and high investment cost, and the coil lead is possibly deformed to block a cooling channel due to huge electromagnetic force, thereby even causing the damage of the coil. Therefore, how to give consideration to high current, strong magnetic field, high stress and slow temperature rise in the coil is always a problem to be solved urgently.

Disclosure of Invention

The embodiment of the application provides a heat dissipation coil based on phase change material to coil can take place deformation because huge electromagnetic force among the solution correlation technique, thereby blocks up cooling channel's problem.

In a first aspect, a phase change material based heat dissipation coil is provided, which includes:

an insulating framework;

the insulating baffles are arranged at two ends of the insulating framework to form a space for winding a coil; a plurality of mounting grooves are formed in the axial outer side of the insulating baffle;

and the heat dissipation shell is arranged in the mounting groove and is internally packaged with a phase change material.

In some embodiments, the insulating framework and the insulating baffle are made of high-strength insulating materials.

In some embodiments, the depth of the mounting groove is less than the thickness of the insulating baffle plate;

the heat dissipation shell adopts a closed shell with a hollow inner part and is fixed in the installation groove.

In some embodiments, a plurality of the mounting grooves are arranged at intervals; and one heat dissipation shell is correspondingly arranged in each mounting groove.

In some embodiments, a heat dissipation support is disposed within the heat dissipation housing.

In some embodiments, the heat dissipation housing and the heat dissipation support are made of metal.

In some embodiments, the number of the heat dissipation supports is one or more.

In some embodiments, the phase change material is a solid phase change material or a composite phase change material.

In some embodiments, an encapsulation layer for wrapping the coil is arranged between the two insulating baffles.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides a heat dissipation coil based on phase change material, owing to place the heat dissipation casing through fluting on insulating baffle of both sides, the inside phase change material that packs of heat dissipation casing, inside heat transmission to the heat dissipation casing when the coil, when reaching phase change material's phase transition temperature, dispel the heat to the coil fast through phase change material's energy storage characteristic in the phase transition process, adopt at the inside phase change material that packs of heat dissipation casing, phase change material is the heat dissipation problem of solving continuous emission, can not use water-cooling structure, reinforcing radiating effect. Meanwhile, the structural strength of the whole structure is enhanced by the matching of the mounting groove and the heat dissipation shell, so that the problems of blockage of the cooling channel inside the coil due to overlarge electromagnetic force and poor water-cooling heat dissipation of the coil are solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a framework and an insulating barrier provided by an embodiment of the present application;

fig. 2 is a schematic diagram of a winding coil on an insulating framework according to an embodiment of the present application;

fig. 3 is a schematic view illustrating an insulating barrier disposed in a heat dissipation housing and a heat dissipation support according to an embodiment of the present application;

fig. 4 is a schematic view illustrating a phase change material filled in a heat dissipation housing according to an embodiment of the disclosure;

FIG. 5 is a top view of a phase change material based heat dissipation coil provided by an embodiment of the present application;

fig. 6 is an overall structural diagram of a heat dissipation coil based on a phase change material according to an embodiment of the present application.

In the figure: 1. an insulating framework; 2. an insulating baffle; 3. a coil; 4. a heat dissipating housing; 5. a heat dissipating support; 6. a phase change material; 7. and (7) packaging the layer.

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 embodiment of the application provides a heat dissipation coil based on phase change material to coil can take place deformation because huge electromagnetic force among the solution correlation technique, thereby blocks up cooling channel's problem.

Referring to fig. 1-6, a phase change material-based heat dissipation coil includes:

an insulating framework 1; insulation baffles 2 installed at both ends of the insulation frame 1 to form a space for winding the coil 3; a plurality of mounting grooves are formed in one side, away from the insulating framework 1, of the insulating baffle 2; namely, a plurality of mounting grooves are arranged on the axial outer side of the insulating baffle 2, wherein the axial direction is the axial direction of the insulating framework 1, the outer side corresponds to the inner side, the inner side refers to the side of the insulating baffle 2 contacted with the coil 3, and therefore the outer side refers to the opposite other side of the insulating baffle 2; and the heat dissipation shell 4 is arranged in the mounting groove, and phase change materials 6 are packaged in the heat dissipation shell.

Referring to fig. 1 and 2, a fast heat dissipation coil according to an embodiment of the present invention may include: the insulating framework 1 is used for winding the coil 3, is in a cylindrical shape, can be made of PE (polyethylene) and the like, requires a smooth outer wall and a certain thickness, has the thickness for conveniently connecting the insulating baffle plates 2 at two ends by using screws, also requires enough strength for supporting the coil wound on the insulating framework, and can bear the interaction force among the coils, and the layer number, the winding turns and the winding direction of the coil 3 can be flexibly set according to actual requirements; insulating barrier 2, it is fixed in the relative both ends of insulating skeleton 1, the protruding outside of locating insulating skeleton 1 of insulating barrier 2, insulating skeleton 1 and insulating barrier 2 all adopt high strength's insulating material to make, insulating barrier 2 fluting is used for placing heat dissipation casing 4, insulating barrier 2 is circular, its material can be epoxy etc, the required strength is high, certain thickness has, intensity is for bearing the huge axial electromagnetic force that the coil produced and not take place the deformation, thickness is for putting into hollow heat dissipation casing 4 in its inside fluting, the diameter of insulating barrier 2 is greater than the diameter of insulating skeleton 1.

Because the heat conductivity coefficient of the heat dissipation shell 4 is high, heat can rapidly enter one side of the heat dissipation shell 4 and then enter the interior of the heat dissipation shell in a heat conduction mode, when the phase change temperature of the phase change material 6 is reached, the coil is rapidly dissipated through the energy storage characteristic of the phase change material 6 in the phase change process, and the heat is also dissipated from the other side of the heat dissipation shell 4, so that the heat dissipation effect is realized; when radiating, the heat dissipation casing 4 in the mounting groove is as supporting the reinforcement, strengthens coil's overall structure, prevents that the coil from can taking place deformation because huge electromagnetic force to block up the condition of cooling channel. So as to take account of the working environment of large current, strong magnetic field and high stress of the coil.

Because the insulating baffle 2 is provided with the slot for placing the heat dissipation shell 4, the phase change material 6 is filled in the heat dissipation shell 4, the heat generated by the coil is transmitted to the inside of the heat dissipation shell 4, when the phase change temperature of the phase change material 6 is reached, the heat absorption characteristic of the phase change material 6 in the phase change conversion process dissipates heat of the coil, and when the coil is finished, the heat release characteristic of the phase change material 6 in the phase change conversion process is changed into the initial state again. The heat dissipation shell 4 is matched with the phase-change material 6 in the heat dissipation shell to dissipate heat, the strength of the whole structure is guaranteed, the heat dissipation shell 4 is prevented from being deformed or even damaged due to overlarge axial electromagnetic force of the coil, and compared with the traditional coil water-cooling heat dissipation structure, the heat dissipation shell is simple and compact in structure, simple to operate and high in cost performance.

Referring to fig. 3, in some embodiments, the depth of the mounting groove is less than the thickness of the insulating barrier 2, i.e., the mounting groove does not penetrate the insulating barrier 2; radiating shell 4 adopts inside hollow closed shell to insulating encapsulation is in the mounting groove, and wherein the encapsulation should be able to satisfy insulating and intensity requirement, also can satisfy structural strength when guaranteeing insulating baffle 2's insulating effect.

The number of the mounting grooves is multiple, the mounting grooves are distributed annularly, and a design distance is reserved between every two adjacent mounting grooves; and a heat dissipation shell 4 is correspondingly arranged in each mounting groove.

The arrangement can prevent a plurality of radiating shells 4 from forming a closed ring, and prevent damage caused by huge electromagnetic force; the ring shape may be circular, elliptical or rectangular, and the design distance may be set as required, so that the heat dissipation housings 4 are uniformly or non-uniformly spaced apart from each other.

The mounting groove above can be rectangle, it is trapezoidal, fan-shaped etc. is all can, heat dissipation casing 4, it is inside arranging insulating baffle 2 in, the degree of depth of mounting groove is greater than heat dissipation casing 4's height, be used for putting into heat dissipation casing 4 completely, heat transfer efficiency can be strengthened to heat dissipation casing 4, for reinforcing insulating baffle 2's structural strength, the optional steel of heat dissipation casing 4, for reducing the whole weight of coil, the optional aluminum product of heat dissipation casing 4, 4 inside phase change material 6 that have filled of heat dissipation casing carries out encapsulation fixed processing after putting into insulating baffle 2. Wherein, heat dissipation casing 4 is fan-shaped, and single fan-shaped angle is 70, and its internal diameter is 65mm, and the external diameter is 89mm, and the wall thickness is 1mm, and the height is 11mm, and heat dissipation casing 4 also can be other shapes and sizes.

Referring to fig. 4, in some embodiments, a heat dissipating support 5 is provided within the heat dissipating housing 4. The heat dissipation shell 4 and the heat dissipation support member 5 are made of metal materials, so that heat conduction and heat dissipation can be accelerated.

The first method comprises the following steps: the number of the heat dissipation support pieces 5 is one, and the internal space of the heat dissipation shell 4 is divided into a first space and a second space which are communicated with each other;

solid phase-change materials are filled in the first space and the second space; or the first space and the second space are both filled with composite phase change materials; or the first space and the second space are both filled with liquid phase-change materials; or the first space is filled with a liquid phase-change material, and the second space is filled with a solid phase-change material. The composite phase-change material and the solid phase-change material should be selected from the types of the existing materials with stronger heat dissipation performance.

In this embodiment, the heat dissipation support 5 also has several forms, which are as follows:

in the first form, the heat dissipation support 5 is connected with the bottom wall at one end, and a channel is formed between the other end and the top wall of the heat dissipation shell 4;

in the second form, two ends of the heat dissipation support member 5 are respectively connected with the bottom wall and the top wall of the heat dissipation shell 4, and a channel is arranged on the heat dissipation support member 5

In the third form, the first space and the second space may not communicate with each other.

And the second method comprises the following steps: the number of the heat dissipation supporting pieces 5 is multiple, and the heat dissipation supporting pieces are distributed along the extending direction of the heat dissipation shell 4; a reinforcing member is further arranged in the heat dissipation shell 4, two ends of the reinforcing member are respectively and vertically connected with the two adjacent heat dissipation supporting members 5, and the reinforcing member is also the heat dissipation supporting member 5 actually.

Specifically, the method comprises the following steps:

the heat dissipation support piece 5 is made of a metal material, and in order to enable the phase change material to be rapidly melted, the heat dissipation support piece can be made of a metal material with a high heat conductivity coefficient, such as a copper material, an aluminum material and the like; the heat dissipation support piece 5 is placed inside the heat dissipation shell 4, the contact area between the heat dissipation support piece 5 and the phase change material 6 can be increased, the heat absorption melting speed of the phase change material 6 is adjusted, and the height of the heat dissipation support piece 5 is smaller than that of the inner space of the heat dissipation shell 4, so that subsequent packaging and fixing treatment are facilitated. The heat dissipation support piece 5 is fan-shaped, single fan-shaped angle is 10 °, and the height is 10mm, and the heat dissipation support piece 5 also can be other shapes and sizes, and in this embodiment, single heat dissipation support piece 5 has only been placed to single heat dissipation casing 4 inside, for making and having more area of contact with phase change material, more quick messenger phase change material melts, can place a plurality of heat dissipation support piece 5 inside heat dissipation casing 4 to and place a plurality of heat dissipation support piece 5 when placing the perpendicular reinforcement of placing between adjacent two heat dissipation support piece 5. The heat dissipation support 5 may be designed in size, shape, and structure according to the heat dissipation rate, the structural requirements, and the like.

In some preferred embodiments, in order to prevent the phase change material 6 from being melted and leaking, an avoidance gap is provided between the phase change material 6 and the inner wall of the heat dissipation shell 4, which takes into account that the maximum volume of the phase change material 6 in the solid or liquid state cannot exceed the space formed by the heat dissipation shell and the heat dissipation support together; a specific example may be: the height of the phase-change material 6 is less than that of the internal space of the heat dissipation shell 4, and the volume of the phase-change material 6 is increased after being melted, so that the leakage is avoided, and an avoiding space is formed. The phase change material 6 may be a solid-solid phase change material or a composite phase change material, etc. The phase change material 6 is also shaped as a sector, with a single sector angle of 30 ° and a height of 10mm.

Wherein just because phase change material 6 is solid phase change material, radiating shell 4 also can not adopt the closed casing of inside hollow, has open-ended metal casing promptly, sets up heat dissipation support piece 5 in it, and solid phase change material packs in radiating shell 4, then encapsulates radiating shell 4 in the mounting groove through insulating encapsulation.

Referring to fig. 5, in some embodiments, the phase-change material 6 is filled at two sides of the heat dissipation support member 5 inside the heat dissipation housing 4, and the phase-change material 6 is in close contact with the heat dissipation support member 5, because the heat conductivity coefficients of the heat dissipation housing 4 and the heat dissipation support member 5 are high, heat can rapidly enter the housing through a heat conduction manner, so that the phase-change material undergoes phase change to dissipate heat of the coil, and the problem that a cooling channel inside the coil is blocked due to too large electromagnetic force is solved.

Referring to fig. 6, in some embodiments, an encapsulation layer 7 may be installed on an outer side of the insulating framework 1, and the encapsulation layer 7 extends from the insulating baffle 2 at one end to the insulating baffle 2 at the other end, in this embodiment, the insulating framework 1 has a cylindrical shape, and the encapsulation layer 7 is installed on the outer side of the insulating framework 1, and may play a role of reinforcing the coil 3 and also play an insulating role.

The principle is as follows:

when the coil 3 is electrified, heat is generated in the coil 3, and when the temperature of the coil 3 reaches the phase change temperature of the phase change material 6, the phase change material 6 is melted and absorbs heat in the form of latent heat, and the temperature of the coil is reduced by reducing the temperature of the insulating baffle 2. Meanwhile, more heat dissipation support pieces 5 can be formed in the shell, and the phase change material can be fully melted by adopting the composite phase change material with high heat conductivity coefficient and the like, so that the coil can dissipate heat quickly.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in this application, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A phase change material based heat dissipation coil, comprising:

an insulating skeleton (1);

the insulating baffles (2) are arranged at two ends of the insulating framework (1) to form a space for winding a coil (3); a plurality of mounting grooves are formed in the axial outer side of the insulating baffle (2);

and the heat dissipation shell (4) is arranged in the mounting groove, and phase change materials (6) are packaged in the heat dissipation shell.

2. The phase change material-based heat dissipation coil of claim 1, wherein:

the insulating framework (1) and the insulating baffle (2) are made of high-strength insulating materials.

3. The phase change material-based heat dissipation coil of claim 1, wherein:

the depth of the mounting groove is smaller than the thickness of the insulating baffle (2);

the heat dissipation shell (4) is a closed shell with a hollow inner part and is fixed in the installation groove.

4. The phase change material-based heat dissipation coil of claim 1, wherein:

the installation grooves are arranged at intervals; and one heat dissipation shell (4) is correspondingly arranged in each mounting groove.

5. The phase change material-based heat dissipation coil of claim 1, wherein:

and a heat dissipation support piece (5) is arranged in the heat dissipation shell (4).

6. The phase change material-based heat dissipation coil of claim 5, wherein:

the heat dissipation shell (4) and the heat dissipation support piece (5) are made of metal materials.

7. The phase change material-based heat dissipation coil of claim 5, wherein:

the number of the heat dissipation supporting pieces (5) is one or more.

8. The phase change material-based heat dissipation coil of claim 1, wherein:

the phase change material (6) is a solid phase change material or a composite phase change material.

9. The phase change material-based heat dissipation coil of claim 1, wherein:

and an encapsulation layer (7) used for wrapping the coil (3) is arranged between the two insulation baffles (2).

Images