阅读说明：本技术 自适应变形简易薄膜加热器 (Self-adaptive deformation simple film heater ) 是由 陈双全 陈占胜 孙伟 陈华 刘炜葳 田敏 黄小虎 王志国 王建炜 周益倩 于 2021-09-03 设计创作，主要内容包括：本发明提供了一种自适应变形简易薄膜加热器,包括薄膜加热器、弹性绝缘导热片及热防护材料；热防护材料包裹在薄膜加热器上并引出薄膜加热器供电线,薄膜加热器的边缘设置在弹性绝缘导热片的一侧壁上；弹性绝缘导热片远离薄膜加热器的一侧壁设置有用于连接温控物体上的连接件。本发明可适应温控物体变形、规避粘贴固化工序、阻断无效红外热辐射路径,具有航天应用前景,可扩展应用于汽车、机械、化工领域。(The invention provides a self-adaptive deformation simple film heater, which comprises a film heater, an elastic insulating heat-conducting fin and a thermal protection material, wherein the elastic insulating heat-conducting fin is made of a plastic material; the thermal protection material is wrapped on the film heater and leads out a power supply line of the film heater, and the edge of the film heater is arranged on one side wall of the elastic insulating heat-conducting sheet; and a connecting piece used for connecting a temperature control object is arranged on one side wall of the elastic insulating heat conducting sheet far away from the film heater. The invention can adapt to the deformation of temperature control objects, avoid the sticking and curing process and block ineffective infrared heat radiation paths, has the aerospace application prospect and can be expanded to be applied to the fields of automobiles, machinery and chemical industry.)

1. A self-adaptive deformation simple film heater is characterized by comprising a film heater (1), an elastic insulating heat-conducting fin (2) and a thermal protection material (3);

the thermal protection material (3) is wrapped on the film heater (1) and leads out a film heater power supply line, and the edge of the film heater (1) is arranged on one side wall of the elastic insulating heat-conducting sheet (2);

and a connecting piece (4) used for connecting a temperature control object is arranged on one side wall of the elastic insulating heat-conducting fin (2) far away from the film heater (1).

2. The adaptive deformation simple film heater according to claim 1, wherein the film heater (1) is adhered to the elastic insulating heat-conducting sheet (2) through a first pressure-sensitive adhesive (5).

3. An adaptive deformation simple film heater according to claim 1, wherein the connecting member comprises a second pressure sensitive adhesive (401) and a pressure sensitive adhesive protective film (402); the second pressure-sensitive adhesive (401) is coated on the elastic insulating heat-conducting sheet (2) in a brush way and covers a pressure-sensitive adhesive protective film (402) with the same area;

when in use, the pressure-sensitive adhesive protective film (402) is uncovered, and one side coated with the second pressure-sensitive adhesive (401) is pasted and pressed on the surface of the temperature-controlled object.

4. The adaptive deformation simple film heater according to claim 1, wherein the thickness of the elastic insulating heat conducting sheet (2) is 0.5 mm-10 mm.

5. An adaptive deformation simple film heater according to claim 1, characterized in that the Poisson's ratio of the elastic insulating heat conducting sheet (2) is larger than 0.4.

6. An adaptive deformation simple film heater according to claim 1, characterized in that the electrical insulation index of the elastic insulating heat-conducting sheet (2) is more than 4000V/mm.

7. An adaptive deformation simple film heater according to claim 1, characterized in that the thermal conductivity of the elastic insulating heat conducting sheet (2) is more than 0.8W/m-k.

8. An adaptive deformation simple film heater according to claim 1, characterized in that the thermal protection material (3) is a stitched thermal control multilayer.

9. The adaptive deformation simple film heater according to claim 8, wherein the inner layer of the thermal control multilayer is a polyimide aluminized secondary surface mirror, and the outer layer of the thermal control multilayer is a single-sided black polyimide thermal insulation layer.

10. An adaptive deformation simple film heater according to claim 1, characterized in that the thermal protection material (3) is provided with air vents.

Technical Field

The invention relates to the technical field of thermal control, in particular to a self-adaptive deformation simple film heater.

Background

In the technical field of thermal control, a film heater is widely applied to solid surface temperature control, the film heater is manufactured by pasting a resistance wire (37870; copper wire or nickel foil wire) on a base material polyimide film, the diameter of the resistance wire is 0.1mm to 0.45mm, the thickness of the base material polyimide film is 0.1mm to 0.15mm, and the film heater is made of superfine metal wires and ultrathin base materials, so that the strength of the film heater is not high, the film heater is easy to break or break, the resistance wire is broken, and the function of the heater fails.

The traditional technology for implementing the thermal control of the thin film heater comprises the following steps: the film heater is directly adhered to a layer of insulating film by adopting curing glue with a certain thickness, and the other surface of the insulating film is adhered to the surface of the temperature control object through the curing glue. The process has the following defects: the curing time of the curing adhesive is long, generally 72 hours, and the serial working time is prolonged; the complete openness of the outer surface of the heater ensures that the heater has a large amount of ineffective heat conduction and heat radiation, and the effective heat efficiency is low; the thickness of the curing adhesive depends on experience and hand feeling of operators, and the thickness cannot be quantitatively controlled, so that the process is easily uncontrolled; the malleable insulating film and the thinner curing glue lead the ductility of the film heater to be poor, and the film heater can not adapt to the deformation of a temperature control object and has the risk of breaking and breaking.

Patent document CN108141915A discloses that a trimmable heater device comprises a plurality of heater device sections separable from each other, the heater device comprising a heater mat having a plurality of heater mat sections together constituting a heater mat length, each heater mat section having a section heater element connected to an electrical power bus for heat generation, one or more heater device sections with corresponding heater mat sections being separable from the other heater sections and removable from the heater device to trim the length of the heater device to a desired length. Heater mat segment boundary markings on the heater device indicate locations at which one of the heater mat segments may be separated from the other remaining heater mat segments of the heater mat without interfering with the segment heater elements of the remaining heater mat segments or the connection of the remaining segment heater elements to the power bus. However, this patent document does not have the ability to accommodate deformation of the object during use.

The patent document with the publication number of CN103983131A discloses a marine light high-efficiency heater, which comprises a heater shell, a heater reserved interface, a heater tube bundle partition plate, a heater tube bundle, a heater support, a heater partition plate, a first inlet, a first outlet, a second inlet and a second outlet, wherein the heater is supported by the heater support; the upper end of the heater shell is provided with a first inlet and a first outlet, and the heated medium enters from the first inlet and flows out from the first outlet. However, this patent document requires the use of heating medium flow conduction.

Patent document CN204377164U discloses a support assembly of an electric heater, comprising: a support base; the electric heater supporting piece is connected with the supporting base in an insulating way; the electric heater fixing part is connected with the electric heater supporting part, and an electric heater fixing cavity for mounting an electric heater is defined between the electric heater fixing part and the electric heater supporting part. However, this patent document does not have a function of adaptive deformation.

Patent document with publication number CN208379046U discloses a dual-support heater, which comprises a heater body, the heater body includes a heater bottom plate and a heater side wall, the heater bottom plate is located at the bottom end of the heater side wall, a plurality of first bar openings are opened at the top end of the heater side wall, and the plurality of first bar openings are distributed in an annular equal distance, a plurality of second bar openings are opened at the bottom end of the heater side wall, and the plurality of second bar openings are distributed in an annular equal distance, a plurality of first support frames are fixedly arranged at the top of the heater body, and the plurality of first support frames are distributed in an annular equal distance, and are used for supporting the heater body, so that the heater body has a stable state. However, this patent document does not have the ability to accommodate deformation of the object during use.

The patent document with the publication number of CN111156709A discloses a portable supporting assembly and an electric pipe heater with the same, which includes a supporting plate, a lifting device and a bottom plate, wherein the lifting device is movably connected with the supporting plate, when the electric pipe heater moves, the electric pipe heater is fixed by a moving block, then the electric pipe heater is lifted to a proper height by the lifting device, so that the electric pipe heater is far away from the ground, then the electric pipe heater is moved to a proper position by a braking wheel, then the electric pipe heater is lowered to a proper height by the lifting device, the supporting plate can be moved away, or the electric pipe heater can be continuously supported, the lifting device is arranged, so as to drive the electric pipe heater to move up and down, thereby the height of the electric pipe heater can be adjusted, the vacuum cavity is arranged, when the device is toppled over, play the cushioning effect to a certain extent, give the staff sufficient time, keep away from equipment, can make the staff keep away from the injury. However, this patent document does not have the ability to accommodate deformation of the object during use.

Disclosure of Invention

In view of the defects in the prior art, the invention aims to provide an adaptive deformation simple film heater.

The invention provides a self-adaptive deformation simple film heater, which comprises a film heater, an elastic insulating heat-conducting fin and a thermal protection material, wherein the elastic insulating heat-conducting fin is arranged on the film heater;

the thermal protection material is wrapped on the film heater and leads out a power supply line of the film heater, and the edge of the film heater is arranged on one side wall of the elastic insulating heat-conducting sheet;

and a connecting piece used for connecting a temperature control object is arranged on one side wall of the elastic insulating heat-conducting fin, which is far away from the film heater.

Preferably, the film heater is attached to the elastic insulating heat-conducting sheet through a first pressure-sensitive adhesive.

Preferably, the connecting piece comprises a second pressure-sensitive adhesive and a pressure-sensitive adhesive protective film; the second pressure-sensitive adhesive is coated on the elastic insulating heat-conducting sheet in a brushing mode and covers the pressure-sensitive adhesive protective film with the same area;

when the temperature control object is used, the pressure-sensitive adhesive protective film is uncovered, and one surface coated with the second pressure-sensitive adhesive is pasted and pressed on the surface of the temperature control object.

Preferably, the thickness of the elastic insulating heat-conducting sheet is 0.5 mm-10 mm.

Preferably, the poisson's ratio of the elastic insulating and heat conducting sheet is greater than 0.4.

Preferably, the electrical insulation index of the elastic insulating heat-conducting sheet is more than 4000V/mm.

Preferably, the thermal conductivity of the elastic insulating and heat conducting sheet is more than 0.8W/m.k.

Preferably, the thermal protection material is a stitched, thermally controlled multilayer.

Preferably, the inner layer of the thermal control multilayer is a polyimide aluminized secondary surface mirror, and the outer layer of the thermal control multilayer is a single-sided black polyimide heat insulation layer.

Preferably, the thermal protection material is provided with an air vent.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention can be adaptive to the deformation of the temperature control object;

2. the invention greatly improves the heat efficiency;

3. the invention can be used after being taken off, and the preparation and pasting processes do not need to be solidified, thereby shortening the heat control implementation time;

4. the invention has the characteristics of simple preparation, universal material taking, high producibility and low cost.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is an exploded view of an adaptive deformation simple film heater according to the present invention;

FIG. 2 is a top view of the adaptive deformation simple film heater of the present invention;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 4 is a top view of an embodiment of an adaptive deformation simplified thin film heater;

fig. 5 is a cross-sectional dimension view of the plane C-C in fig. 4.

The figures show that:

film heater 1 second pressure sensitive adhesive 401

Elastic insulating heat conducting sheet 2 pressure sensitive adhesive protective film 402

Thermal protection material 3 first pressure sensitive adhesive 5

Connecting piece 4

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

As shown in fig. 1 to 3, the simple film heater with adaptive deformation provided by the present invention includes a film heater 1, an elastic insulating heat-conducting strip 2 and a heat protection material 3, wherein the heat protection material 3 is wrapped on the film heater 1 and leads out a power supply line of the film heater, an edge of the film heater 1 is disposed on a side wall of the elastic insulating heat-conducting strip 2, and a side wall of the elastic insulating heat-conducting strip 2 away from the film heater 1 is provided with a connecting member 4 for connecting a temperature control object. The thermal protection material 3 is a sewn thermal control multilayer, the inner layer of the thermal control multilayer is a polyimide aluminized secondary surface mirror, the outer layer of the thermal control multilayer is a single-sided black polyimide heat insulation layer, and the thermal protection material 3 is provided with an air vent. The film heater 1 is coated with a thermal protection material 4 to block ineffective thermal convection and thermal radiation and improve thermal efficiency.

The thickness of the elastic insulating heat-conducting strip 2 is 0.5 mm-10 mm, the Poisson ratio of the elastic insulating heat-conducting strip 2 is greater than 0.4, the electrical insulation index of the elastic insulating heat-conducting strip 2 is greater than 4000V/mm, and the heat conductivity coefficient of the elastic insulating heat-conducting strip 2 is greater than 0.8W/m.k.

The film heater 1 is adhered on the elastic insulating heat-conducting sheet 2 through the first pressure-sensitive adhesive 5. The connecting piece comprises a second pressure-sensitive adhesive 401 and a pressure-sensitive adhesive protective film 402, wherein the second pressure-sensitive adhesive 401 is coated on the elastic insulating heat-conducting strip 2 in a brushing mode and covers the pressure-sensitive adhesive protective film 402 with the same area, when the connecting piece is used, the pressure-sensitive adhesive protective film 402 is uncovered, and one surface coated with the second pressure-sensitive adhesive 401 is pasted and pressed on the surface of a temperature control object.

When the temperature control heater is used, the pressure-sensitive adhesive protective film is uncovered, one surface coated with the pressure-sensitive adhesive is pasted and pressed on the surface of a temperature control object, and the lead is connected, so that the implementation of the heat control of the temperature control heater is completed immediately.

In a preferred embodiment, in order to achieve the effects of adaptive deformation, insulation and heat conduction, the elastic insulating heat-conducting sheet is a heat-conducting silica gel sheet; the thermal protection material adopts a plurality of sewed thermal control layers, wherein the inner layer is a polyimide aluminized secondary surface mirror, the number of layers is 2 to 5, the outer layer is a single-sided black polyimide thermal insulation layer, the number of layers is 1, and the thermal protection material is provided with air vents when being applied in the aerospace field; the first pressure-sensitive adhesive and the second pressure-sensitive adhesive are both polyamic acid; the pressure-sensitive adhesive protective film is a Polyethylene (PE) film.

Example (b):

a high-pressure gas cylinder of a certain satellite propulsion system is in a thin-wall structure with hemispheres at two ends and a middle cylinder. Compared with the normal pressure state, the radial and axial sizes of the gas cylinder filled with rated pressure are increased, the extension rate of the circumferential size is 1 percent and the extension rate of the axial size is 0.6 percent after the conversion. According to the design, a 50mm 80mm thin film heater is designed to be used. When the film heater is pasted, 50mm corresponds to the circumferential direction, 80mm corresponds to the axial direction, the maximum deformation of the pasting surface of the adaptive deformation simple and efficient film heater along the 50mm direction is 0.5mm, and the maximum deformation of the pasting surface along the 80mm direction is 0.48 mm. Considering that the Poisson ratio of the elastic insulating heat conducting sheet is 0.4, the minimum thickness H of the elastic insulating heat conducting sheet is 1.372mm, and the elastic insulating heat conducting sheet is 1.5mm in combination with the optional model.

As shown in fig. 4 and 5, the size of the known film heater is 50mm × 80mm, the thickness H of the elastic insulating heat conducting sheet is 2mm, the size of the elastic insulating heat conducting sheet is 80mm × 110mm × 2mm, the size of the heat shielding material, the pressure sensitive adhesive protective film and the pressure sensitive adhesive covered by the heat shielding material is 80mm × 110mm, and the boundary of the pressure sensitive adhesive used for adhering the heat shielding material is the area surrounded by 80mm × 110mm and 50mm × 80 mm.

When the pressure-sensitive adhesive is used, the pressure-sensitive adhesive protective film is uncovered, the surface coated with the pressure-sensitive adhesive is pasted and pressed on the surface of the high-pressure gas cylinder, and the connection wire can be implemented.

According to actual application and measured data, the simple and efficient film heater with the self-adaptive deformation does not contain a curing process, so that the production efficiency of thermal control implementation is improved, the strain capacity of the heater is far smaller than that of the heater directly bonded to the wall surface, the deformation capacity of a temperature control object can be self-adaptive, and the thermal efficiency of the heater is improved.

The invention provides a self-adaptive deformation simple high-efficiency film heater, which can be self-adaptive to the deformation of a temperature control object by selecting elastic insulating heat-conducting fins with different thicknesses H, and avoid the heater failure caused by the deformation of the temperature control object in the whole life process; the outer surface of the heater is covered by a thermal protection material, so that ineffective heat conduction and heat radiation paths are blocked, and the heat efficiency is greatly improved; independent of the preparation process of the temperature control object, the serial curing time of the traditional heater during thermal control implementation is avoided; the simple packaging method and the universal material selection lead the heater to have the characteristics of high manufacturability and low cost. The self-adaptive deformation simple efficient heater has an aerospace application prospect, and can be expanded and applied to the fields of automobiles, machinery and chemical industry.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in 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 constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.