CN113739242A - Waterproof heating module with high protection structure and preparation method thereof - Google Patents
Waterproof heating module with high protection structure and preparation method thereof Download PDFInfo
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- CN113739242A CN113739242A CN202111145961.8A CN202111145961A CN113739242A CN 113739242 A CN113739242 A CN 113739242A CN 202111145961 A CN202111145961 A CN 202111145961A CN 113739242 A CN113739242 A CN 113739242A
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- frame body
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
- F24D13/02—Electric heating systems solely using resistance heating, e.g. underfloor heating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/18—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being embedded in an insulating material
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/08—Electric heater
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/20—Heat consumers
- F24D2220/2009—Radiators
- F24D2220/2036—Electric radiators
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/017—Manufacturing methods or apparatus for heaters
Abstract
The invention discloses a waterproof heating module with a high-protection structure, which comprises a heating layer, a heat insulation layer, an adhesive and a metal frame body, wherein the heating layer is arranged on the metal frame body through the adhesive, the heat insulation layer is arranged in the metal frame body, and the heating layer is arranged between the heat insulation layers; the invention belongs to the technical field of electric heating modules, and particularly relates to a waterproof heating module with a high protection structure, which has the advantages that the waterproof performance can reach the high waterproof performance of IPX7, so that an electric heating module product can be used more safely and conveniently.
Description
Technical Field
The invention belongs to the technical field of electric heating modules, and particularly relates to a waterproof heating module with a high protection structure and a preparation method thereof.
Background
With the improvement of living standard of people, the demand for heating and heat supply is higher and higher, and graphene electric heating products rising in recent years begin to rapidly lead market trend. The electric heating module product convenient to mount is gradually popular in the market, but the existing module product does not have a protection structure and waterproof performance, so that the market application of the module is limited, and the module has certain damage risks in the transportation and mounting processes.
Disclosure of Invention
In order to solve the problems, the invention provides a waterproof heating module with a high protection structure and a preparation method thereof, and the high-waterproof electric heating module with the high protection structure and the waterproof performance reaching IPX7 enables an electric heating module product to be used more safely and conveniently.
In order to realize the functions, the technical scheme adopted by the invention is as follows: a waterproof heating module with a high-protection structure comprises a heating layer, a heat preservation layer, an adhesive and a metal frame body, wherein the heating layer is arranged on the metal frame body through the adhesive, the heat preservation layer is arranged in the metal frame body, and the heating layer is arranged between the heat preservation layers; the heating layer adopts the electric heat membrane for the layer that generates heat, the electric heat membrane includes first insulation layer, first adhesive layer, leakage current recovery layer, second insulating layer, second adhesive layer, current-carrying device, zone of heating and third insulating layer, first insulation layer, first adhesive layer, leakage current recovery layer, second insulating layer, second adhesive layer, current-carrying device, zone of heating and third insulating layer set gradually.
Further, the adhesive is one or more of an EVA hot melt adhesive, a PU hot melt adhesive, a PE hot melt adhesive, a polyurethane adhesive, an acrylic adhesive, a polyamide adhesive, an epoxy resin adhesive and a polyolefin adhesive; the first insulating layer, the second insulating layer and the third insulating layer are made of one of a polyester film, a polyethylene film, a polyvinyl chloride film, a polypropylene film, a nylon film and a polyamide film; the first adhesive layer and the second adhesive layer are made of one of EVA (ethylene vinyl acetate) hot melt adhesive, PU (polyurethane) hot melt adhesive, PE (polyethylene) hot melt adhesive, polyurethane adhesive, acrylic adhesive, polyamide adhesive, epoxy resin adhesive and polyolefin adhesive.
Furthermore, the leakage current recovery layer adopts metal foils, conductive ink and conductive plastic materials as the leakage current recovery layer; the current-carrying device adopts a copper sheet, an aluminum sheet or conductive ink and conductive silver paste as the current-carrying device, and the conductive layer of the leakage current recovery layer is communicated with a zero line N circuit of the current-carrying device; the heating layer is a heating layer for heating carbon paste printing, and generates heat after being electrified by the current-carrying device; the heat preservation adopts polyurethane to set up, and foaming techniques such as polyethylene, PVC, polyphenyl that have the heat preservation effect can also be as the heat preservation.
Further, the metal framework uses the sheet metal setting of knurling, the metal framework adopts steel sheet or aluminum plate setting, be equipped with enstrophe metal plate edge, blanking butt joint seam and insulation material notes material hole in the metal framework, the enstrophe metal plate edge is located metal framework periphery, the blanking is located enstrophe metal plate edge junction to the seam, insulation material notes material hole is located in the metal framework, the heat preservation passes through insulation material and annotates the material hole and locate in the metal framework.
The invention also comprises a preparation method of the waterproof heating module with the high-protection structure, which comprises the following steps:
1) cutting a steel plate or an aluminum plate into a square plate body, and punching to remove corners of the square plate body to form a regular pattern of unfilled corners;
2) the metal plate is punched into a bent shape, the metal plate is bent for multiple times by using a bending machine, four sides of the metal plate are bent for two times with the angle of 90 degrees and the width of 10-20mm respectively, and a carriage body structure with the layer height of 10-20mm and four sides of 10-20mm inwards turned is formed;
according to the punched corners, the first-time bent inward flanging is 10-20mm in width, the height of the bent cavity is 10-20mm, and the size of a reserved heat-insulating material injection hole is 5-10mm to form a metal frame body;
3) injecting a polyurethane foaming material into the polyurethane mixture from the heat-insulating material injection hole by using a polyurethane foaming machine to form a heat-insulating layer with a certain thickness;
4) connecting the electric heating film on the heating layer with a circuit, and reserving a male head and a female head; bonding the processed electrothermal film to the inner surface of the metal frame body through an adhesive;
5) and arranging a protective layer material outside the metal frame body, wherein the protective layer material is made of metal plates, paper or thin films, and is bonded to the plate edge of the metal frame body by double-sided adhesive or adhesive.
Further, the adhesives in the step 4) and the step 5) adopt two-component epoxy resin adhesives, wherein a component A and a component B are arranged in the two-component epoxy resin adhesives, and the component A and the component B are mixed according to the proportion of 6: 1; the component A comprises 43 parts of E51 epoxy resin, 10 parts of dimethylbenzene, 6 parts of n-butanol, 0.6 part of dispersant, 0.4 part of flatting agent, 1.5 parts of DOP, 20.4 parts of talcum powder, 14.5 parts of quartz powder and 4.6 parts of defoaming agent; the component B comprises 86 parts of D230 type curing agent, 9 parts of dimethylbenzene, 4 parts of n-butanol and 1 part of accelerator.
Further, the preparation method of the component A comprises the following steps: firstly, adding 10KG dimethylbenzene into E51 epoxy resin with the weight of 43KG, stirring by using a stirrer, after stirring for 15 minutes, adding 6KG n-butanol, then stirring for 15 minutes, sequentially adding 0.6KG dispersant and 0.4KG defoamer, stirring for 20 minutes, then adding 1.5KG DOP, stirring for 15 minutes, then adding 20.4KG talcum powder, stirring for 20 minutes, adding 14.5KG quartz powder, and stirring for 30 minutes; and standing for more than 4 hours after stirring to complete the preparation of the adhesive of the component A.
Further, the preparation method of the component B comprises the following steps: 21.5KG of Basff D230 type curing agent is taken, 2.25KG of xylene is added and stirred for 15 minutes, 1KG of n-butanol is added and stirred for 15 minutes, 0.25 KG of accelerator is added and stirred for 20 minutes, and curing agent B is prepared.
Mixing the prepared epoxy resin A and the curing agent B according to the proportion of 6:1, stirring for 10 minutes by using a stirrer, coating the mixture on the back of a metal plate by using a rolling brush, a scraping plate and the like, and then adhering the electrothermal film and the metal frame.
The adhesive used between the electrothermal film and the metal frame body ensures that the peeling force between the electrothermal film and the metal frame body is larger than 100N, the electrothermal film and the metal frame body do not fall off under the condition that the electrothermal film is electrified and heated to 90 ℃, and the electrothermal film can be normally ensured to be safely used under the condition that the metal frame body expands with heat and contracts with cold. According to the scheme provided by the invention, in the process of pasting the electrothermal film by using the adhesive, the adhesive is added with aggregates such as talcum powder, calcium powder, quartz sand, double-flying powder and the like, so that the pasting firmness of the electrothermal film and the metal frame body and the stretching performance of resisting thermal expansion and cold contraction are ensured. Through a large number of practices, under the condition that common adhesives are used and aggregates are not added, the adhesion between the electrothermal film and the metal frame body can cause the phenomena of delamination, separation, stretching and the like of the metal frame body and the electrothermal film under the condition that the electrothermal film is heated by electrifying or the metal frame body expands with heat and contracts with cold. The method for bonding by adding a certain amount of aggregate into the adhesive ensures effective and stable bonding of the electrothermal film and the metal frame body.
Further, the polyurethane foaming material in the step 3) is a black and white material mixed polyurethane foaming material, the black and white material mixed polyurethane foaming material comprises a polyurethane white material and a polyurethane black material, the mixing ratio of the polyurethane white material to the polyurethane black material is 1.05:1, and the polyurethane white material comprises 85 parts of polyether polyol, 15 parts of polyester polyol, 2 parts of a foam stabilizer, 3 parts of a catalyst, 3 parts of deionized water, 30 parts of a foaming agent and 12 parts of a flame retardant according to the mass ratio; the polyurethane black material is isocyanate;
the thickness of the product is only 15mm, so a certain proportion of polyester polyol should be added into the white material of the polyurethane mixture to enhance the hardness of the foaming thermal insulation material, and if the certain proportion of polyester polyol is not added, the foaming is soft, and the effective support for the metal shell cannot be formed. Through practical measurement and calculation, the electrothermal module with high protection function prepared by using the polyurethane white material and the polyurethane black material in proportion can meet the lamination requirement of 400KG, the mixing ratio of the polyurethane white material and the polyurethane black material is strictly controlled in the foaming process, the mixing degree of the electrothermal module reaches more than 96%, if the mixing degree in the foaming process does not reach more than 96%, a secondary mixing reaction can be generated in the process of electrifying and heating a later product, so that the whole electrothermal module deforms, even a sealing closed structure formed initially is damaged, the temperature of the polyurethane white material is controlled to be in a temperature range of 25-30 ℃, the temperature of the polyurethane black material is in a temperature range of 22-26 ℃, and meanwhile, the electrothermal module is placed in a warm mold with the temperature of 50-55 ℃, so that the rotating speed and the flow rate of polyurethane foaming equipment are kept consistent, the mixing ratio is ensured to reach the preset ratio of 1.05:1, the mixing degree is more than 96%, the product is tested after foaming, the foaming mixing degree reaches more than 98% on the premise of ensuring the white material temperature, the black material temperature and the mold temperature, and the product does not have defective products such as secondary mixing, hollowing and the like in the later period.
The bonding performance of polyurethane is fully utilized to integrally form a sealed integral heating module with high protection structure and waterproof performance. And the leakage current recovery device can effectively recover the leakage current generated by the electric heating layer on the metal plate. So that the product can be safely and conveniently used in a humid environment.
The invention adopts the structure to obtain the following beneficial effects: the waterproof heating module with the high protection structure is simple to operate, compact in mechanism and reasonable in design, the metal shell with the high protection performance is used, the problem of the protection structure of the module is solved, and the module is not easy to damage in the transportation and installation processes; the electrified heating body is provided with a leakage current recovery circuit device and a multilayer composite sealing structure, the waterproof performance reaches the level of IPX7, the waterproof performance problem of the module is solved, and the module can be immersed in water; the sealing and heat-insulating material is filled integrally, so that the integral sealing and waterproof performance of the product is ensured, and the problem of overlarge leakage current of the module in a humid environment is solved; the product has high fireproof and waterproof performance, can meet the requirement of long-time water soaking work, and can easily deal with wet use environments such as cement, ceramic tiles and the like.
Drawings
Fig. 1 is a schematic structural diagram of a waterproof heating module with a high protection structure according to the present invention;
fig. 2 is an exploded view of a waterproof heating module with a high protection structure according to the present invention.
The device comprises a metal frame body 1, a metal frame body 2, an adhesive 3, a first insulating layer 4, a first adhesive layer 5, a leakage current recovery layer 6, a second insulating layer 7, a second adhesive layer 8, a current-carrying device 9, a heating layer 10, a third insulating layer 11, a heat-insulating layer 12, a heating layer 13, an inverted metal plate edge 14, a blanking butt seam 15 and a heat-insulating material injection hole.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-2, the waterproof heating module with a high protection structure of the present invention includes a heating layer 12, a heat insulating layer 11, an adhesive 2 and a metal frame 1, wherein the heating layer 12 is disposed on the metal frame 1 through the adhesive 2, the heat insulating layer 11 is disposed in the metal frame 1, and the heating layer 12 is disposed between the heat insulating layers 11; the heating layer 12 adopts the electric heat membrane to be heating layer 12, the electric heat membrane includes first insulating layer 3, first adhesive layer 4, leakage current recovery layer 5, second insulating layer 6, second adhesive layer 7, current-carrying device 8, zone of heating 9 and third insulating layer 10, first insulating layer 3, first adhesive layer 4, leakage current recovery layer 5, second insulating layer 6, second adhesive layer 7, current-carrying device 8, zone of heating 9 and third insulating layer 10 set gradually.
The adhesive 2 is one or more of an EVA hot melt adhesive, a PU hot melt adhesive, a PE hot melt adhesive, a polyurethane adhesive, an acrylic adhesive, a polyamide adhesive, an epoxy resin adhesive and a polyolefin adhesive; the first insulating layer 3, the second insulating layer 6 and the third insulating layer 10 are made of one of a polyester film, a polyethylene film, a polyvinyl chloride film, a polypropylene film, a nylon film and a polyamide film; the first adhesive layer 4 and the second adhesive layer 7 are made of one of an EVA hot melt adhesive, a PU hot melt adhesive, a PE hot melt adhesive, a polyurethane adhesive, an acrylic adhesive, a polyamide adhesive, an epoxy resin adhesive and a polyolefin adhesive.
The leakage current recovery layer 5 adopts metal foils, conductive ink and conductive plastic materials as the leakage current recovery layer 5; the current-carrying device 8 adopts a copper sheet, an aluminum sheet or conductive ink and conductive silver paste as the current-carrying device 8, and the conductive layer of the leakage current recovery layer 5 is communicated with a zero line N circuit of the current-carrying device 8; the heating layer 9 is a heating layer 9 for heating carbon paste printing, and generates heat after being electrified by the current-carrying device 8; the heat-insulating layer 11 is made of polyurethane.
The metal frame body 1 uses the sheet metal setting of knurling, metal frame body 1 adopts steel sheet or aluminum plate setting, be equipped with enstrophe metal plate edge 13, blanking butt joint 14 and insulation material on the metal frame body 1 and annotate material hole 15, enstrophe metal plate edge 13 is located metal frame body 1 periphery, the blanking is located enstrophe metal plate edge 13 junction to seam 14, insulation material is annotated material hole 15 and is located on the metal frame body 1, heat preservation 11 is annotated material hole 15 through insulation material and is located in the metal frame body 1.
The invention also comprises a preparation method of the waterproof heating module with the high-protection structure, which comprises the following steps:
1) cutting a steel plate or an aluminum plate into a square plate body, and punching to remove corners of the square plate body to form a regular pattern of unfilled corners;
2) the metal plate is punched into a bent shape, the metal plate is bent for multiple times by using a bending machine, four sides of the metal plate are bent for two times with the angle of 90 degrees and the width of 10-20mm respectively, and a carriage body structure with the layer height of 10-20mm and four sides of 10-20mm inwards turned is formed; according to the punched corners, the first-time bent inward flanging is 10-20mm in width, the height of the bent cavity is 10-20mm, and the reserved heat-insulating material injection hole 15 is 5-10mm in size to form a metal frame body 1;
3) injecting a polyurethane foaming material into the polyurethane mixture from the heat-insulating material injection hole 15 by using a polyurethane foaming machine to form a heat-insulating layer 11 with a certain thickness;
4) connecting the electric heating film on the heating layer 12 with a circuit, and reserving a male head and a female head; bonding the processed electrothermal film to the inner surface of the metal frame body 1 through an adhesive 2;
5) the method comprises the steps that a protective layer material is arranged outside a metal frame body 1, the protective layer material is made of metal plates, paper or thin films, and the protective layer material is bonded to the plate edge of the metal frame body 1 through double-faced adhesive tape or adhesive 2.
The adhesive 2 in the step 4) and the step 5) is a two-component epoxy resin adhesive 2, a component A and a component B are arranged in the two-component epoxy resin adhesive 2, and the component A and the component B are mixed according to a ratio of 6: 1; the component A comprises 43 parts of E51 epoxy resin, 10 parts of dimethylbenzene, 6 parts of n-butanol, 0.6 part of dispersant, 0.4 part of flatting agent, 1.5 parts of DOP, 20.4 parts of talcum powder, 14.5 parts of quartz powder and 4.6 parts of defoaming agent; the component B comprises 86 parts of D230 type curing agent, 9 parts of dimethylbenzene, 4 parts of n-butanol and 1 part of accelerator.
The preparation method of the component A comprises the following steps: firstly, adding 10KG xylene into E51 epoxy resin with the weight of 43KG, stirring by using a stirrer, after stirring for 15 minutes, adding 6KG n-butanol, then stirring for 15 minutes, sequentially adding 0.6KG dispersant and 0.4KG defoamer, stirring for 20 minutes, adding 1.5KG DOP, stirring for 15 minutes, then adding 20.4KG talcum powder, stirring for 20 minutes, adding 14.5KG quartz powder, and stirring for 30 minutes; and standing for more than 4 hours after stirring to complete the preparation of the component A adhesive 2.
The preparation method of the component B comprises the following steps: 21.5KG of Basff D230 type curing agent is taken, 2.25KG of xylene is added and stirred for 15 minutes, 1KG of n-butanol is added and stirred for 15 minutes, 0.25 KG of accelerator is added and stirred for 20 minutes, and curing agent B is prepared.
Mixing the prepared epoxy resin A and the curing agent B according to the proportion of 6:1, stirring for 10 minutes by using a stirrer, coating the mixture on the back of a metal plate by using a rolling brush, a scraping plate and the like, and then adhering the electrothermal film and the metal frame body 1.
The adhesive 2 used between the electrothermal film and the metal frame body 1 ensures that the peeling force between the electrothermal film and the metal frame body 1 is larger than 100N, the electrothermal film and the metal frame body 1 do not fall off under the condition that the electrothermal film is electrified and heated to 90 ℃, and the electrothermal film can be normally ensured to be safely used under the condition that the metal frame body 1 generates expansion with heat and contraction with cold. Therefore, according to the scheme provided by the invention, in the process of pasting the adhesive 2 and the electrothermal film, the adhesive 2 is added with aggregates such as talcum powder, calcium powder, quartz sand, double-flying powder and the like, so that the firmness of pasting the electrothermal film and the metal frame body 1 and the stretching performance of resisting thermal expansion and cold contraction are ensured. Through a large number of practices, under the condition that the common adhesive 2 is used and no aggregate is added, the adhesion between the electrothermal film and the metal frame body 1 can cause the phenomena of delamination, separation, stretching and the like of the metal frame body 1 and the electrothermal film under the condition that the electrothermal film is electrified and heated or the metal frame body 1 expands with heat and contracts with cold. The method for bonding by adding a certain aggregate into the adhesive 2 ensures effective and stable bonding of the electrothermal film and the metal frame body 1.
The polyurethane foaming material in the step 3) is a black and white material mixed polyurethane foaming material, the black and white material mixed polyurethane foaming material comprises a polyurethane white material and a polyurethane black material, the mixing ratio of the polyurethane white material to the polyurethane black material is 1.05:1, and the polyurethane white material comprises 85 parts of polyether polyol, 15 parts of polyester polyol, 2 parts of foam stabilizer, 3 parts of catalyst, 3 parts of deionized water, 30 parts of foaming agent and 12 parts of flame retardant according to the mass ratio; the polyurethane black material is isocyanate;
the thickness of the product is only 15mm, so a certain proportion of polyester polyol should be added into the white material of the polyurethane mixture to enhance the hardness of the foaming thermal insulation material, and if the certain proportion of polyester polyol is not added, the foaming is soft, and the effective support for the metal shell cannot be formed. Through practical measurement and calculation, the electrothermal module with high protection function prepared by using the polyurethane white material and the polyurethane black material in proportion can meet the lamination requirement of 400KG, the mixing ratio of the polyurethane white material and the polyurethane black material is strictly controlled in the foaming process, the mixing degree of the electrothermal module reaches more than 96%, if the mixing degree in the foaming process does not reach more than 96%, a secondary mixing reaction can be generated in the process of electrifying and heating a later product, so that the whole electrothermal module deforms, even a sealing closed structure formed initially is damaged, the temperature of the polyurethane white material is controlled to be in a temperature range of 25-30 ℃, the temperature of the polyurethane black material is in a temperature range of 22-26 ℃, and meanwhile, the electrothermal module is placed in a warm mold with the temperature of 50-55 ℃, so that the rotating speed and the flow rate of polyurethane foaming equipment are kept consistent, the mixing ratio is ensured to reach the preset ratio of 1.05:1, the mixing degree is more than 96%, the product is tested after foaming, the foaming mixing degree reaches more than 98% on the premise of ensuring the white material temperature, the black material temperature and the mold temperature, and the product does not have defective products such as secondary mixing, hollowing and the like in the later period.
The bonding performance of polyurethane is fully utilized to integrally form a sealed integral heating module with high protection structure and waterproof performance. And the leakage current recovery device can effectively recover the leakage current generated by the electric heating layer on the metal plate. So that the product can be safely and conveniently used in a humid environment.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A waterproof heating module with a high-protection structure is characterized by comprising a heating layer, a heat preservation layer, an adhesive and a metal frame body, wherein the heating layer is arranged on the metal frame body through the adhesive, the heat preservation layer is arranged in the metal frame body, and the heating layer is arranged between the heat preservation layers; the heating layer adopts the electric heat membrane for the layer that generates heat, the electric heat membrane includes first insulation layer, first adhesive layer, leakage current recovery layer, second insulating layer, second adhesive layer, current-carrying device, zone of heating and third insulating layer, first insulation layer, first adhesive layer, leakage current recovery layer, second insulating layer, second adhesive layer, current-carrying device, zone of heating and third insulating layer set gradually.
2. The waterproof heating module with the high-protection structure as claimed in claim 1, wherein the adhesive is one or more of an EVA hot melt adhesive, a PU hot melt adhesive, a PE hot melt adhesive, a polyurethane adhesive, an acrylic adhesive, a polyamide adhesive, an epoxy resin adhesive and a polyolefin adhesive; the first insulating layer, the second insulating layer and the third insulating layer are made of one of a polyester film, a polyethylene film, a polyvinyl chloride film, a polypropylene film, a nylon film and a polyamide film; the first adhesive layer and the second adhesive layer are made of one of EVA (ethylene vinyl acetate) hot melt adhesive, PU (polyurethane) hot melt adhesive, PE (polyethylene) hot melt adhesive, polyurethane adhesive, acrylic adhesive, polyamide adhesive, epoxy resin adhesive and polyolefin adhesive.
3. The waterproof heating module with high protection structure of claim 2, wherein the leakage current recycling layer is made of metal foil, conductive ink or conductive plastic material; the current-carrying device adopts a copper sheet, an aluminum sheet or conductive ink and conductive silver paste as the current-carrying device, and the conductive layer of the leakage current recovery layer is communicated with a zero line N circuit of the current-carrying device; the heating layer is a heating layer for heating carbon paste printing, and generates heat after being electrified by the current-carrying device; the heat-insulating layer is made of polyurethane.
4. The waterproof heating module with the high protection structure is characterized in that the metal frame body is arranged by using an embossed metal thin plate, the metal frame body is arranged by adopting a steel plate or an aluminum plate, the metal frame body is provided with inwards-turned metal plate edges, a punched butt seam and a heat-insulating material injection hole, the inwards-turned metal plate edges are arranged on the periphery of the metal frame body, the punched butt seam is arranged at the joint of the inwards-turned metal plate edges, the heat-insulating material injection hole is arranged on the metal frame body, and the heat-insulating layer is arranged in the metal frame body through the heat-insulating material injection hole.
5. A method for preparing the waterproof heating module with high protection structure according to any one of claims 1 to 4, which comprises the following steps:
1) cutting a steel plate or an aluminum plate into a square plate body, and punching to remove corners of the square plate body to form a regular pattern of unfilled corners;
2) the metal plate is punched into a bent shape, the metal plate is bent for multiple times by using a bending machine, four sides of the metal plate are bent for two times with the angle of 90 degrees and the width of 10-20mm respectively, and a carriage body structure with the layer height of 10-20mm and four sides of 10-20mm inwards turned is formed; according to the punched corners, the first-time bent inward flanging is 10-20mm in width, the height of the bent cavity is 10-20mm, and the size of a reserved heat-insulating material injection hole is 5-10mm to form a metal frame body;
3) injecting a polyurethane foaming material into the polyurethane mixture from the heat-insulating material injection hole by using a polyurethane foaming machine to form a heat-insulating layer with a certain thickness;
4) connecting the electric heating film on the heating layer with a circuit, and reserving a male head and a female head; bonding the processed electrothermal film to the inner surface of the metal frame body through an adhesive;
5) and arranging a protective layer material outside the metal frame body, wherein the protective layer material is made of metal plates, paper or thin films, and is bonded to the plate edge of the metal frame body by double-sided adhesive or adhesive.
6. The preparation method of the waterproof heating module with the high-protection structure according to claim 5, wherein the adhesives in the steps 4) and 5) are two-component epoxy resin adhesives, a component A and a component B are arranged in the two-component epoxy resin adhesives, and the component A and the component B are mixed according to a ratio of 6: 1; the component A comprises 43 parts of E51 epoxy resin, 10 parts of dimethylbenzene, 6 parts of n-butanol, 0.6 part of dispersant, 0.4 part of flatting agent, 1.5 parts of DOP, 20.4 parts of talcum powder, 14.5 parts of quartz powder and 4.6 parts of defoaming agent; the component B comprises 86 parts of D230 type curing agent, 9 parts of dimethylbenzene, 4 parts of n-butanol and 1 part of accelerator.
7. The preparation method of the waterproof heating module with the high-protection structure as claimed in claim 6, wherein the preparation method of the component A comprises the following steps: firstly, adding 10KG xylene into E51 epoxy resin with the weight of 43KG, stirring by using a stirrer, after stirring for 15 minutes, adding 6KG n-butanol, then stirring for 15 minutes, sequentially adding 0.6KG dispersant and 0.4KG defoamer, stirring for 20 minutes, adding 1.5KG DOP, stirring for 15 minutes, then adding 20.4KG talcum powder, stirring for 20 minutes, adding 14.5KG quartz powder, and stirring for 30 minutes; and standing for more than 4 hours after stirring to complete the preparation of the adhesive of the component A.
8. The preparation method of the waterproof heating module with the high-protection structure as claimed in claim 6, wherein the preparation method of the component B comprises the following steps: 21.5KG of Basff D230 type curing agent is taken, 2.25KG of xylene is added and stirred for 15 minutes, 1KG of n-butanol is added and stirred for 15 minutes, 0.25 KG of accelerator is added and stirred for 20 minutes, and curing agent B is prepared.
9. The preparation method of the waterproof heating module with the high-protection structure is characterized in that in the step 3), the polyurethane foaming material is a black and white material mixed polyurethane foaming material, the black and white material mixed polyurethane foaming material comprises a polyurethane white material and a polyurethane black material, the mixing ratio of the polyurethane white material to the polyurethane black material is 1.05:1, and the polyurethane white material comprises 85 parts of polyether polyol, 15 parts of polyester polyol, 2 parts of foam stabilizer, 3 parts of catalyst, 3 parts of deionized water, 30 parts of foaming agent and 12 parts of flame retardant according to the mass ratio; the polyurethane black material is isocyanate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116170909A (en) * | 2023-03-23 | 2023-05-26 | 深圳中缆电缆集团有限公司 | Environment-friendly carbon core cable |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116170909A (en) * | 2023-03-23 | 2023-05-26 | 深圳中缆电缆集团有限公司 | Environment-friendly carbon core cable |
| CN116170909B (en) * | 2023-03-23 | 2023-07-18 | 深圳中缆电缆集团有限公司 | Environment-friendly carbon core cable |
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