CN214675733U - Three-phase electric heating film - Google Patents

Abstract

The utility model discloses a three-phase electric heating film, its main points are: the heat-generating chip component comprises an upper insulating layer, a heat-generating core layer, a lower insulating layer and an electric connecting chip component. The heating core layer is wrapped between the upper insulating layer and the lower insulating layer. The corresponding conductive heating strips of 3 structures are integrated together through star-shaped or triangular connection, so that the novel electrothermal film capable of adopting three-phase power supply is formed. The utility model discloses a three-phase electrothermal film connects convenience, three-phase consumption difference little, is applicable to the balanced higher occasion of requirement of three-phase, like rail transit vehicle direct current contravariant three-phase power supply system.

Description

Three-phase electric heating film

Technical Field

The utility model relates to an electric heat membrane technical field specifically is a three-phase electric heat membrane.

Background

The electrothermal film in the electric heating system is a film product which can generate heat after being electrified, is made by processing and hot-pressing conductive paint and metal current-carrying bars among insulating polyester films and belongs to a low-temperature radiation electrothermal film. The electric heating film generates heat which is sent into the space in a radiation mode, so that a human body feels warm, and the comprehensive effect of the electric heating film is superior to that of the traditional convection heating mode. The heating system is generally composed of a power supply, a temperature controller, a connecting piece, an insulating layer, an electrothermal film and a decorative layer. The power supply is communicated with the electrothermal film through a lead to convert electric energy into heat energy. The electrothermal film is not only widely applied to heating systems of civil buildings such as houses, schools, shops, hospitals and office buildings, but also widely applied to heating systems of industrial buildings such as factory buildings and warehouses. The electrothermal film is also applied to heating systems of rail vehicles, the fields of road snow melting and the like, and the electrothermal film has wide application prospect. However, the common household electric heating film is 220V single-phase electricity, three-phase electricity is used in some occasions (such as factories, railway vehicles and the like), and the 220V single-phase electricity electric heating film can influence three-phase balance.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, the utility model electric heat membrane of three-phase that uses under the three-phase power supply system occasion.

Realize the utility model discloses the basic technical scheme of purpose is: a three-phase electric heating film is structurally characterized in that: the heat-generating chip component comprises an upper insulating layer, a heat-generating core layer, a lower insulating layer and an electric connecting chip component. The heating core layer is wrapped between the upper insulating layer and the lower insulating layer.

The heating core layer comprises a U-phase connecting part, a V-phase connecting part, a W-phase connecting part and three conductive heating strips, wherein the three conductive heating strips are respectively called as the U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip according to different phases electrically connected with the three conductive heating strips. The U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip are connected with three-phase loads of the corresponding U-phase connecting part, the V-phase connecting part and the W-phase connecting part in a star connection or a triangular connection mode. The electric connection sheet assembly comprises a U-phase electric connection sheet, a V-phase electric connection sheet and a W-phase electric connection sheet. The U-phase electric connecting sheet is fixedly connected and electrically connected with the U-phase connecting part coated by the upper insulating layer and the lower insulating layer. The V-phase electric connection piece is fixedly connected and electrically connected with the V-phase connection part coated by the upper insulating layer and the lower insulating layer. The W-phase electric connection piece is fixedly connected and electrically connected with the part of the W-phase connection part coated by the upper insulating layer and the lower insulating layer.

The further technical scheme based on the basic technical scheme is as follows: the three conductive heating strips are arranged in an S shape, and the parts parallel to each other in the front-back direction are arranged in a manner that the distance between the three conductive heating strips is reduced from inside to outside on the whole. The head end of the U-phase conductive heating strip is electrically connected with the U-phase connecting part. The head end of the V-phase conductive heating strip is electrically connected with the V-phase connection part. The head end of the W-phase conductive heating strip is electrically connected with the W-phase connection part. The tail ends of the U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip are electrically connected with each other.

The technical scheme based on the further technical scheme is as follows: the zero line connecting part is further included. The electrical connection pad assembly further includes a neutral electrical connection pad. The tail ends of the U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip are electrically connected with the zero line connecting part through the electric connecting heating strip. The zero line electric connection sheet is fixedly connected and electrically connected with the corresponding part of the zero line connection part coated by the upper insulating layer and the lower insulating layer.

The technical scheme based on the further technical scheme is as follows: the lower insulating layer is provided with a first printing portion, a second printing portion and a third phase printing portion from left to right in sequence. The heating core layer also comprises an electric connection heating strip. Electrically connecting the heat-generating strips is disposed around edges of the first printed portion, the second printed portion, and the third printed portion.

The first printing portion, the second printing portion and the third printing portion are all provided with a U-phase connecting portion, a V-phase connecting portion and a W-phase connecting portion.

The U-phase connecting portion of the first printing portion is electrically connected with the U-phase connecting portion of the second printing portion. The U-phase conductive heating strips are arranged on the front parts of the first printing part and the second printing part in an S shape. One end of the U-phase conductive heating strip of the first printing part is electrically connected with the U-phase connecting part of the first printing part, and the other end of the U-phase conductive heating strip is electrically connected with the electric connecting heating strip. One end of the U-phase conductive heating strip of the second printing part is electrically connected with the U-phase connecting part of the second printing part, and the other end of the U-phase conductive heating strip is electrically connected with the electric connecting heating strip.

The W-phase connecting portion of the first printing portion and the W-phase connecting portion of the second printing portion are electrically connected. The W-phase conductive heating strips are arranged on the rear portions of the first printing portion and the second printing portion in an S-shaped mode, and are symmetrically arranged with the U-phase conductive heating strips of the first printing portion and the second printing portion in a front-back mode. One end of the W-phase conductive heating strip of the first printing part is electrically connected with the W-phase connection part of the first printing part, and the other end of the W-phase conductive heating strip of the first printing part is electrically connected with the electric connection heating strip. One end of the W-phase conductive heating strip of the second printing part is electrically connected with the W-phase connection part of the second printing part, and the other end of the W-phase conductive heating strip is electrically connected with the electric connection heating strip.

The V-phase connecting portion of the first printing portion is electrically connected with the V-phase connecting portion of the second printing portion, and the V-phase connecting portion of the second printing portion is electrically connected with the V-phase connecting portion of the third printing portion.

The V-phase conductive heating strips are arranged on the third printing portion in an S shape and are symmetrically arranged in the front and back direction. One end of the V-phase conductive heating bar positioned in front of the third printing part is electrically connected with the V-phase connection part of the first printing part, and the other end of the V-phase conductive heating bar is electrically connected with the electric connection heating bar. One end of the V-phase conductive heating strip positioned at the rear part of the third printing part is electrically connected with the V-phase connection part of the first printing part, and the other end of the V-phase conductive heating strip is electrically connected with the electric connection heating strip.

The technical scheme based on the further technical scheme is as follows: the lower insulating layer is provided with a U-phase printing part, a V-phase printing part and a W-phase printing part from left to right in sequence. The heating core layer also comprises an electric connection heating strip. The electric connection heating strips are continuously arranged along the back edges of the U-phase printing part, the V-phase printing part and the W-phase printing part. The U-phase printing part, the V-phase printing part and the W-phase printing part are all provided with a U-phase connecting part, a V-phase connecting part and a W-phase connecting part.

The U-phase conductive heating strips are arranged on the U-phase printing part in an S shape. The head end of the U-phase conductive heating strip is electrically connected with the U-phase connection part of the U-phase printing part, and the tail end of the U-phase conductive heating strip is electrically connected with the electric connection heating strip positioned on the printing part.

The V looks connecting portion of V looks printing portion are connected with the V looks connecting portion electricity of U looks printing portion, and the electrically conductive heating strip of V looks is the S type and arranges the setting on V looks printing portion, and the head end of the electrically conductive heating strip of V looks is connected with the V looks connecting portion electricity of V looks printing portion, and the end of the electrically conductive heating strip of V looks is connected with the electricity that is located V looks printing portion and is connected the heating strip electricity and be connected.

The W looks connecting portion of V looks printing portion are connected with the W phase connection portion electricity of U looks printing portion, and the W looks connecting portion of W looks printing portion is connected with the W phase connection portion electricity of V looks printing portion, and the electrically conductive heating strip of W looks is the S type and arranges the setting on W looks printing portion, and the head end of the electrically conductive heating strip of W looks is connected with the W phase connection portion electricity of W looks printing portion, and the end of the electrically conductive heating strip of W looks is connected with the electricity that is located W looks printing portion and is received the heating strip electricity and be connected.

The further technical scheme based on the corresponding technical scheme is as follows: the zero line connecting part is further included. The electrical connection pad assembly further includes a neutral electrical connection pad. The tail ends of the U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip are electrically connected with the zero line connecting part through the electric connecting heating strip. The zero line electric connection sheet is fixedly connected and electrically connected with the corresponding part of the zero line connection part coated by the upper insulating layer and the lower insulating layer.

The further technical scheme based on the basic technical scheme is as follows: the three conductive heating strips are arranged in an S shape. One end of the U-phase conductive heating strip is electrically connected with the U-phase connecting part, and the other end of the U-phase conductive heating strip is electrically connected with the V-phase connecting part. One end of the V-phase conductive heating bar is electrically connected with the V-phase connecting part, and the other end of the V-phase conductive heating bar is electrically connected with the W-phase connecting part. One end of the W-phase conductive heating strip is electrically connected with the W-phase connecting part, and the other end of the W-phase conductive heating strip is electrically connected with the U-phase conductive heating strip. All the conductive heating strips are always arranged in parallel.

Realize the utility model discloses the second basic technical scheme of purpose is: a three-phase electric heating film is structurally characterized in that: the heat-generating chip component comprises an upper insulating layer, a heat-generating core layer, a lower insulating layer and an electric connecting chip component. The heating core layer is wrapped between the upper insulating layer and the lower insulating layer.

The heating core layer comprises a U-phase connecting part, a V-phase connecting part, a W-phase connecting part, an R-phase connecting part, an S-phase connecting part, a T-phase connecting part and three conductive heating strips, wherein the three conductive heating strips are respectively called as the U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip according to the difference of phases electrically connected with the three conductive heating strips. The three conductive heating strips are arranged in an S shape. The head end of the U-phase conductive heating strip is electrically connected with the U-phase connecting part, and the tail end of the U-phase conductive heating strip is electrically connected with the R-phase connecting part. The head end of the V-phase conductive heating strip is electrically connected with the V-phase connecting part, and the tail end of the V-phase conductive heating strip is electrically connected with the S-phase connecting part. The head end of the W-phase conductive heating strip is electrically connected with the W-phase connection part, and the tail end of the W-phase conductive heating strip is electrically connected with the T-phase connection part.

The electric connection sheet assembly comprises a U-phase electric connection sheet, a V-phase electric connection sheet, a W-phase electric connection sheet, an R-phase electric connection sheet, an S-phase electric connection sheet and a T-phase electric connection sheet. The U-phase electric connecting sheet is fixedly connected and electrically connected with the U-phase connecting part coated by the upper insulating layer and the lower insulating layer. The V-phase electric connection piece is fixedly connected and electrically connected with the V-phase connection part coated by the upper insulating layer and the lower insulating layer. The W-phase electric connection piece is fixedly connected and electrically connected with the part of the W-phase connection part coated by the upper insulating layer and the lower insulating layer. The R-phase electric connecting sheet is fixedly connected and electrically connected with the corresponding part of the R-phase connecting part coated by the upper insulating layer and the lower insulating layer. The S-phase electric connecting sheet is fixedly connected and electrically connected with the corresponding part of the S-phase connecting part coated by the upper insulating layer and the lower insulating layer. The T-phase electric connection piece is fixedly connected and electrically connected with the corresponding part of the T-phase connection part coated by the upper insulating layer and the lower insulating layer.

A further technical solution based on the implementation of the second basic technical solution is: the lower insulating layer is provided with a U-phase printing part, a V-phase printing part and a W-phase printing part from right to left in sequence.

The U-phase connecting portion of the W-phase printing portion is electrically connected to the U-phase connecting portion of the V-phase printing portion, and the U-phase connecting portion of the V-phase printing portion is electrically connected to the U-phase connecting portion of the U-phase printing portion.

The R-phase connecting portion of the W-phase printing portion is electrically connected to the R-phase connecting portion of the V-phase printing portion, and the R-phase connecting portion of the V-phase printing portion is electrically connected to the R-phase connecting portion of the U-phase printing portion.

The U-phase conductive heating strips are arranged on the U-phase printing portion in an S shape, the head ends of the U-phase conductive heating strips are electrically connected with the U-phase connecting portion of the U-phase printing portion, and the tail ends of the U-phase conductive heating strips are electrically connected with the R-phase connecting portion of the U-phase printing portion.

The V-phase connection portion of the W-phase printing portion is electrically connected to the V-phase connection portion of the V-phase printing portion. The S-phase connection portion of the W-phase printing portion is electrically connected to the S-phase connection portion of the V-phase printing portion.

The V-phase conductive heating strips are arranged on the V-phase printing portion in an S-shaped mode, the head ends of the V-phase conductive heating strips are electrically connected with the V-phase connection portion of the V-phase printing portion, and the tail ends of the V-phase conductive heating strips are electrically connected with the S-phase connection portion of the V-phase printing portion.

The W-phase conductive heating strips are arranged on the W-phase printing portion in an S-shaped mode, the head ends of the W-phase conductive heating strips are electrically connected with the W-phase connection portion of the W-phase printing portion, and the tail ends of the W-phase conductive heating strips are electrically connected with the T-phase connection portion of the W-phase printing portion.

The utility model discloses following beneficial effect has: (1) the utility model discloses a three-phase electric heating film simple structure is integrated together through star or triangular connection to the corresponding electrically conductive strip that generates heat of 3 structures, becomes a brand-new electric heating film that can adopt the three-phase power supply. The utility model discloses a three-phase electric heating film connects convenience, three-phase consumption difference little (< 1%), is applicable to the balanced higher occasion of requirement of three-phase, like rail transit vehicle direct current contravariant three-phase power supply system.

(2) The utility model discloses a three-phase electric heat membrane has still broken through the mode that traditional evenly distributed set up, brand-new design theory has been adopted, reach the heat transfer and the heat dissipation condition by heating surface (floor) according to electric heat membrane service environment, adjustment electric heat membrane power density distributes (through the electrically conductive sectional area of adjustment interval and/or electrically conductive heating strip), when the occasion that heat transfer and heat dissipation are faster, by heating surface temperature present great gradient, electric heat membrane central temperature is high, the ambient temperature is low, through improving electric heat membrane peripheral power density, reduce the power density in the middle of the electric heat membrane, guarantee that electric heat membrane bulk temperature distributes evenly, prevent that local temperature is too high, increase of service life and safety in utilization. When the heating core layer is made of metal materials, the heating core layer is electrified and heats by means of metal resistors, and is pure resistive, and the heating efficiency is more than 99%. And the metal resistivity is positive temperature coefficient, and when the electric heat membrane temperature rose to certain extent, the resistance grow, and power reduces, and restriction electric heat membrane temperature further rose, reached balanced state very fast, had certain self-limiting temperature characteristic, and the safety in utilization improves greatly.

(3) The three-phase electric heating film disclosed by the embodiment 1 of the utility model realizes the uniform distribution of temperature by changing the distance between the adjacent parts of the heating parts which are parallel to each other, the heat dissipation of the middle part is slow, the distance between the heating parts is large, the heating quantity is small, the heat in the outer side can be radiated to the inner side, and the middle part is ensured to reach the set temperature; the periphery is fast in heat dissipation, the distance between heating portions is small, the heating amount is large, a part of heat is radiated to the inner side, the temperature of the inner side is guaranteed, and a part of heat is radiated to the periphery, so that the periphery is guaranteed to reach the set temperature.

(4) The width of the continuous three-phase electrothermal film in the left and right direction corresponds to the width of the floor of the rail vehicle, so that the workload of construction can be reduced, and the laying efficiency is improved; the single-sheet three-phase electric heating film has better flexibility and is suitable for local laying construction.

(5) The utility model discloses a three-phase electric heat membrane 'S the portion of generating heat has adopted snakelike S distribution mode, and adjacent strip parallel portion' S that generates heat current opposite direction, according to right-hand spiral rule, the magnetic field that the strip that generates heat produced on the electric heat membrane can offset each other, reduces the interference to other equipment on the rail vehicle, uses the reliability further to improve.

Drawings

Fig. 1 is a schematic structural view of a three-phase three-wire electrothermal film of an embodiment 1 of the present invention in a star connection.

Fig. 2 is a schematic view of a layer structure of a three-phase three-wire electrothermal film according to embodiment 1 of the present invention.

Fig. 3 is a schematic structural view of a three-phase three-wire electrothermal film according to embodiment 2 of the present invention, which is connected in a star shape.

Fig. 4 is a schematic structural view of a three-phase three-wire three-continuous electrothermal film of embodiment 3 of the present invention in a star connection.

Fig. 5 is a schematic structural view of a three-phase three-wire three-continuous electrothermal film of embodiment 4 of the present invention in a star connection.

Fig. 6 is a schematic structural view of the three-phase three-wire electrothermal film of the present invention in the case of triangular connection.

Fig. 7 is a schematic structural view of a three-phase four-wire electrothermal film according to embodiment 6 of the present invention.

Fig. 8 is a schematic structural view of a three-phase four-wire electrothermal film according to embodiment 7 of the present invention.

Fig. 9 is a schematic structural view of a three-phase four-wire triple-connected electrothermal film according to embodiment 8 of the present invention.

Fig. 10 is a schematic structural view of a three-phase three-wire electrothermal film according to embodiment 9 of the present invention.

Fig. 11 is a schematic structural view of a three-phase three-wire three-continuous electrothermal film according to embodiment 10 of the present invention.

The reference numbers in the drawings are:

an upper insulating layer (1) is formed on the substrate,

the heat generating core layer 2 is formed of a heat generating core layer,

the U-phase conductive heating bar 21 is,

the V-phase conductive heat generating strip 22,

the W-phase conductive heating bar 23,

the neutral wire connection part 24 is provided with,

the heat-generating strip 25 is electrically connected,

u-phase connecting part 21-1, V-phase connecting part 22-1, W-phase connecting part 23-1, R-phase connecting part 21-2, S-phase connecting part 22-2, T-phase connecting part 23-2,

a lower insulating layer 3, a U-phase printing part 3-1, a V-phase printing part 3-2, a W-phase printing part 3-3,

a first printing section 3a, a second printing section 3b, a third printing section 3c,

the electric connection piece component 4, the U-phase electric connection piece 4-1, the V-phase electric connection piece 4-2, the W-phase electric connection piece 4-3, the zero line electric connection piece 4-4 and the zero line electric connection piece 4-5.

Detailed Description

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings. The description of the position of the utility model is carried out according to the position shown in fig. 1, namely the left and right directions about the upper and lower that fig. 1 is shown is the back left and right direction of description, and the party that fig. 1 faced is the top, and the party that deviates from fig. 1 is the below.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

It should be understood that the terms "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on the positional relationships illustrated in the drawings, and are used only for convenience in describing the present invention or simplifying the description, but do not indicate that a particular orientation must be provided.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, 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 invention can be understood in specific cases to those skilled in the art.

(example 1)

Referring to fig. 1 and 2, the present embodiment 1 is a three-phase three-wire single-sheet type three-phase electric heating film, and the three-phase load is star-connected. The three-phase electric heating film of the embodiment 1 includes an upper insulating layer 1, a heat generating core layer 2, a lower insulating layer 3, and an electric connection sheet assembly 4. The upper insulating layer 1 and the lower insulating layer 3 are made of the same PET (PET is an abbreviation of Polyethylene terephthalate, abbreviated as PET or PETP) or PI (PI is an abbreviation of Polyimide, abbreviated as Polyimide in PI, and is a heterocyclic aromatic polymer compound with a molecular structure containing imide chain links) or epoxy resin material. The corresponding part of the upper insulating layer 1 is fixed on the lower insulating layer 3 from top to bottom through hot-melt adhesive bonding, and the heating core layer 2 is coated between the upper insulating layer 1 and the lower insulating layer 3. The upper insulating layer 1 and the lower insulating layer 3 have the same shape and size.

The heating core layer 2 comprises a U-phase connecting part 21-1, a V-phase connecting part 22-1, a W-phase connecting part 23-1 and three conductive heating strips, wherein the three conductive heating strips are respectively called as the U-phase conductive heating strip 21, the V-phase conductive heating strip 22 and the W-phase conductive heating strip 23 according to different phases electrically connected with the three conductive heating strips. The U-phase connecting portion 21-1, the V-phase connecting portion 22-1, the W-phase connecting portion 23-1, and the three conductive heating strips are printed on the upper side of the lower insulating layer 3 by a screen printing method or made of a metal foil adhesively bonded on the upper side of the lower insulating layer 3 by a printing etching method, the conductive heating strip of the present embodiment is made of an aluminum foil adhesively bonded on the upper side of the lower insulating layer 3 by a printing etching method, the three conductive heating strips are arranged in an S-shape, and portions parallel to each other in the front-rear direction are arranged at intervals in a decreasing manner from inside to outside as a whole, and the specific arrangement method is as follows: according to the formula P = I R, the series state currents are the same, the smaller the conductive sectional area of the conductive heating bar is, the larger the resistance is, and the larger the power is;

the heat Q is proportional to the electric power P, to time, and inversely proportional to the square of the radius, the coefficient k of the formula being related to the heat dissipation condition, k ranging from 0 to 1. According to the electric heating film service environment and the heated surface (floor) heat transfer and heat dissipation conditions, the power density distribution of the electric heating film is adjusted (by adjusting the distance and/or the conductive sectional area of the conductive heating strip, the embodiment is realized by adjusting the distance between the conductive heating strip and the electric heating strip), when the heat transfer and heat dissipation are faster, the temperature of the heated surface presents larger gradient, the central temperature of the electric heating film is high, the peripheral temperature is low, and the peripheral power density of the electric heating film is improved, so that the reduction of the peripheral power density of the electric heating film is realizedThe power density in the middle of the electric heating film enables the temperature of the heated surface to be more uniform. The head end of the U-phase conductive heating bar 21 is electrically connected to the U-phase connecting portion 21-1. The head end of the V-phase conductive heat generating bar 22 is electrically connected to the V-phase connection portion 22-1. The head end of the W-phase conductive heating bar 23 is electrically connected to the W-phase connecting portion 23-1. The ends of the U-phase conductive heating bar 21, the V-phase conductive heating bar 22 and the W-phase conductive heating bar 23 are electrically connected to each other. The electric connection sheet assembly 4 comprises a U-phase electric connection sheet 4-1, a V-phase electric connection sheet 4-2 and a W-phase electric connection sheet 4-3. The U-phase electric connecting sheet 4-1, the V-phase electric connecting sheet 4-2 and the W-phase electric connecting sheet 4-3 are made of copper materials. The U-phase electric connecting sheet 4-1 is fixedly connected and electrically connected to the U-phase connecting part 21-1 coated by the upper insulating layer 1 and the lower insulating layer 3 by piercing and crimping, and pierces the lower insulating layer 3 downwards to form riveting and fixing connection. The V-phase electric connection piece 4-2 is fixedly connected by piercing and crimping and is electrically connected with the V-phase connection part 22-1 coated by the upper insulating layer 1 and the lower insulating layer 3, and the lower insulating layer 3 is pierced downwards to form riveting fixed connection. The W-phase electric connection piece 4-3 is fixedly connected by piercing and crimping and is electrically connected with the W-phase connection part 23-1 coated by the upper insulating layer 1 and the lower insulating layer 3, and the lower insulating layer 3 is pierced downwards to form riveting fixed connection.

The utility model discloses a can set up in corresponding floor or wallboard during the use of electrical heating membrane, U looks electricity connection piece 4-1, V looks electricity connection piece 4-2 and W looks electricity connection piece 4-3 are respectively through corresponding wire and three phase current's U looks, V looks and W looks electricity are connected, U looks electricity connection piece 4-1 and the part that corresponding wire electricity is connected, V looks electricity connection piece 4-2 and the part that corresponding wire electricity is connected and W looks electricity connection piece 4-3 and the part that corresponding wire electricity is connected all seal the processing through waterproof sealant.

(example 2)

Referring to fig. 3, the present embodiment 2 is a three-phase three-wire single-sheet type three-phase electric heating film. The rest of this example is the same as example 1, except that: the distances between the mutually parallel parts of the U-phase conductive heating strip 21, the V-phase conductive heating strip 22 and the W-phase conductive heating strip 23 in the middle part of the electric heating film are always kept consistent, and the distances between the mutually parallel parts of the parts at the left side and the right side are arranged in a decreasing manner from inside to outside.

(example 3)

Referring to fig. 4, the present embodiment 3 is a three-phase three-wire continuous three-phase electrothermal film. The rest of this example is the same as example 1, except that: the lower insulating layer 3 is provided with a U-phase printing part 3-1, a V-phase printing part 3-2 and a W-phase printing part 3-3 from left to right in sequence. The heat emitting core layer 2 further includes an electrically connected heat emitting bar 25. The electric connection heat emission bar 25 is continuously provided along the rear edges of the U-phase printing part 3-1, the V-phase printing part 3-2 and the W-phase printing part 3-3.

The U-phase printing part 3-1, the V-phase printing part 3-2 and the W-phase printing part 3-3 are respectively provided with a U-phase connecting part 21-1, a V-phase connecting part 22-1 and a W-phase connecting part 23-1.

The U-phase conductive heating strips 21 are arranged on the U-phase printing part 3-1 in an S-shaped arrangement. The head end of the U-phase conductive heating bar 21 is electrically connected to the U-phase connecting portion 21-1 of the U-phase printed portion 3-1, and the tail end of the U-phase conductive heating bar 21 is electrically connected to the electrical connection heating bar 25 located at the U-phase printed portion 3-1.

The V-phase connecting part 22-1 of the V-phase printing part 3-2 is electrically connected with the V-phase connecting part 22-1 of the U-phase printing part 3-1, the V-phase conductive heating strips 22 are arranged on the V-phase printing part 3-2 in an S-shaped arrangement mode, the head end of the V-phase conductive heating strip 22 is electrically connected with the V-phase connecting part 22-1 of the V-phase printing part 3-2, and the tail end of the V-phase conductive heating strip 22 is electrically connected with the electric connecting heating strip 25 positioned on the V-phase printing part 3-2.

The W-phase connecting part 23-1 of the V-phase printing part 3-2 is electrically connected with the W-phase connecting part 23-1 of the U-phase printing part 3-1, the W-phase connecting part 23-1 of the W-phase printing part 3-3 is electrically connected with the W-phase connecting part 23-1 of the V-phase printing part 3-2, the W-phase conductive heating strips 23 are arranged on the W-phase printing part 3-3 in an S-shaped arrangement mode, the head ends of the W-phase conductive heating strips 23 are electrically connected with the W-phase connecting part 23-1 of the W-phase printing part 3-3, and the tail ends of the W-phase conductive heating strips 23 are electrically connected with the electric connecting heating strips 25 positioned on the W-phase printing part 3-3.

(example 4)

Referring to fig. 5, the embodiment 4 is a three-phase three-wire continuous three-phase electrothermal film. The rest of this example is the same as example 1, except that: the lower insulating layer 3 is provided with a first printing portion 3a, a second printing portion 3b, and a third phase printing portion 3c in this order from left to right. The heat emitting core layer 2 further includes an electrically connected heat emitting bar 25. An electrically connected heat-emitting bar 25 is provided around the edges of the first printed portion 3a, the second printed portion 3b, and the third printed portion 3 c.

The first printing portion 3a, the second printing portion 3b and the third printing portion 3c are each provided with a U-phase connecting portion 21-1, a V-phase connecting portion 22-1 and a W-phase connecting portion 23-1.

The U-phase connection portion 21-1 of the first printing portion 3a and the U-phase connection portion 21-1 of the second printing portion 3b are electrically connected; the U-phase conductive heat emitting bars 21 are disposed on the front portions of the first and second printing portions 3a and 3b in an S-shaped arrangement. One end of the U-phase conductive heating bar 21 of the first printing portion 3a is electrically connected to the U-phase connecting portion 21-1 of the first printing portion 3a, and the other end is electrically connected to the electrical connection heating bar 25; one end of the U-phase conductive heat emitting bar 21 of the second printed portion 3b is electrically connected to the U-phase connecting portion 21-1 of the second printed portion 3b, and the other end is electrically connected to the electrical heat emitting bar 25.

The W-phase connection portion 23-1 of the first printing portion 3a and the W-phase connection portion 23-1 of the second printing portion 3b are electrically connected; the W-phase conductive heating strips 23 are arranged on the rear parts of the first printing part 3a and the second printing part 3b in an S-shaped arrangement, and are symmetrically arranged with the U-phase conductive heating strips 21 of the first printing part 3a and the second printing part 3b in the front-back direction; one end of the W-phase conductive heating bar 23 of the first printing portion 3a is electrically connected to the W-phase connecting portion 23-1 of the first printing portion 3a, and the other end is electrically connected to the electrical connection heating bar 25; one end of the W-phase conductive heat emitting bar 23 of the second printed portion 3b is electrically connected to the W-phase connecting portion 23-1 of the second printed portion 3b, and the other end is electrically connected to the electrical heat emitting bar 25.

The V-phase connection portion 22-1 of the first printing portion 3a and the V-phase connection portion 22-1 of the second printing portion 3b are electrically connected, and the V-phase connection portion 22-1 of the second printing portion 3b and the V-phase connection portion 22-1 of the third printing portion 3c are electrically connected;

the V-phase conductive heating strips 22 are arranged on the third printing portion 3c in an S-shaped arrangement, and are arranged symmetrically in front and rear directions. One end of the V-phase conductive heat emitting stripe 22 positioned in front of the third printed portion 3c is electrically connected to the V-phase connecting portion 22-1 of the first printed portion 3a, and the other end is electrically connected to the electrical heat emitting stripe 25. One end of the V-phase conductive heat emitting stripe 22 positioned at the rear of the third printed portion 3c is electrically connected to the V-phase connecting portion 22-1 of the first printed portion 3a, and the other end is electrically connected to the electrical heat emitting stripe 25.

(example 5)

Referring to fig. 6, the present embodiment 5 is a three-phase three-wire single-sheet type three-phase electric heating film. The rest of this example is the same as example 3, except that: the three-phase load of the embodiment is in delta connection. One end of the U-phase conductive heating bar 21 is electrically connected with the U-phase connecting part 21-1, and the other end is electrically connected with the V-phase connecting part 22-1; one end of the V-phase conductive heating bar 22 is electrically connected with the V-phase connecting part 22-1, and the other end is electrically connected with the W-phase connecting part 23-1; one end of the W-phase conductive heating bar 23 is electrically connected with the W-phase connecting part 23-1, and the other end is electrically connected with the U-phase conductive heating bar 21. All the conductive heating strips are always arranged in parallel.

(example 6)

Referring to fig. 7, the present embodiment 6 is a three-phase four-wire single-sheet type three-phase electric heating film. The rest of this example is the same as example 1, except that: a neutral connection 24 is also included. The zero line connection part 24 is electrically connected to the electrically connected heat radiating strip 25. The electrical connection pad assembly 4 also includes neutral electrical connection pads 4-5. The ends of the U-phase conductive heating bar 21, the V-phase conductive heating bar 22 and the W-phase conductive heating bar 23 are electrically connected to the neutral wire connecting part 24 through the electrical connection heating bar 25.

The zero line electric connection sheets 4-5 are fixedly connected by piercing and crimping and are electrically connected to corresponding parts of the zero line connection part 24 coated by the upper insulating layer 1 and the lower insulating layer 3, and the lower insulating layer 3 is pierced downwards to form riveting fixed connection.

(example 7)

Referring to fig. 8, this embodiment 7 is a three-phase four-wire single-sheet type three-phase electrothermal film. The rest of this example is the same as example 2, except that: a neutral connection 24 is also included. The zero line connection part 24 is electrically connected to the electrically connected heat radiating strip 25. The electrical connection pad assembly 4 also includes neutral electrical connection pads 4-5. The ends of the U-phase conductive heating bar 21, the V-phase conductive heating bar 22 and the W-phase conductive heating bar 23 are electrically connected to the neutral wire connecting part 24 through the electrical connection heating bar 25.

The zero line electric connection sheets 4-5 are fixedly connected by piercing and crimping and are electrically connected to corresponding parts of the zero line connection part 24 coated by the upper insulating layer 1 and the lower insulating layer 3, and the lower insulating layer 3 is pierced downwards to form riveting fixed connection.

(example 8)

Referring to fig. 9, the present embodiment 8 is a three-phase four-wire continuous three-phase electric heating film. The rest of this example is the same as example 3, except that: a neutral connection 24 is also included. The zero line connection part 24 is electrically connected to the electrically connected heat radiating strip 25. The electrical connection pad assembly 4 also includes neutral electrical connection pads 4-5. The zero line electric connection sheets 4-5 are fixedly connected by piercing and crimping and are electrically connected to corresponding parts of the zero line connection part 24 coated by the upper insulating layer 1 and the lower insulating layer 3, and the lower insulating layer 3 is pierced downwards to form riveting fixed connection. The neutral wire connecting part 24 is continuously provided on the U-phase printing part 3-1, the V-phase printing part 3-2 and the W-phase printing part 3-3.

The end of the U-phase conductive heating bar 21 is electrically connected to the electrical connection heating bar 25 located at the U-phase printed portion 3-1.

The end of the V-phase conductive heating bar 22 is electrically connected to the electrical connection heating bar 25 located at the V-phase printed portion 3-2.

The end of the W-phase conductive heating bar 23 is electrically connected to the electrical heating bar 25 located at the W-phase printed portion 3-3.

(example 9)

Referring to fig. 10, the present embodiment 9 is an externally connected single-sheet type three-phase electrothermal film. The rest of this example is the same as example 1, except that: the heat generating core layer 2 further includes an R-phase connecting portion 21-2, an S-phase connecting portion 22-2, and a T-phase connecting portion 23-2.

The electric connection sheet assembly 4 further comprises R-phase electric connection sheets 4-6, S-phase electric connection sheets 4-7 and T-phase electric connection sheets 4-8. The R-phase electric connecting sheets 4-6 are fixedly connected by piercing and crimping and are electrically connected to corresponding parts of the R-phase connecting parts 21-2 coated by the upper insulating layer 1 and the lower insulating layer 3, and the lower insulating layer 3 is pierced downwards to form riveting fixed connection.

The S-phase electric connection pieces 4-7 are fixedly connected by piercing and crimping and are electrically connected to corresponding parts of the S-phase connection parts 22-2 coated by the upper insulating layer 1 and the lower insulating layer 3, and the lower insulating layer 3 is pierced downwards to form riveting fixed connection.

The T-phase electric connection pieces 4-8 are fixedly connected by piercing and crimping and are electrically connected to corresponding parts of the T-phase connection parts 23-2 coated by the upper insulating layer 1 and the lower insulating layer 3, and the lower insulating layer 3 is pierced downwards to form riveting fixed connection.

The end of the U-phase conductive heating bar 21 is electrically connected to the R-phase connecting portion 21-2.

The end of the V-phase conductive heating bar 22 is electrically connected to the S-phase connection part 22-2.

The end of the W-phase conductive heating bar 23 is electrically connected to the T-phase connection portion 23-2.

(example 10)

Referring to fig. 11, the present embodiment 10 is an external connection continuous three-phase electrothermal film. The rest of this example is the same as example 3, except that: the lower insulating layer 3 is provided with a U-phase printing part 3-1, a V-phase printing part 3-2 and a W-phase printing part 3-3 in sequence from right to left.

The heat generating core layer 2 further includes an R-phase connecting portion 21-2, an S-phase connecting portion 22-2, and a T-phase connecting portion 23-2. The U-phase printing part 3-1, the V-phase printing part 3-2 and the W-phase printing part 3-3 are respectively provided with an R-phase connecting part 21-2, an S-phase connecting part 22-2 and a T-phase connecting part 23-2.

The electric connection sheet assembly 4 further comprises R-phase electric connection sheets 4-6, S-phase electric connection sheets 4-7 and T-phase electric connection sheets 4-8. The R-phase electric connecting sheets 4-6 are fixedly connected and electrically connected on corresponding parts of the R-phase connecting parts 21-2 coated by the upper insulating layer 1 and the lower insulating layer 3 of the W-phase printing part 3-3 by adopting piercing and crimping, and pierce the lower insulating layer 3 downwards to form riveting fixed connection.

The S-phase electric connection pieces 4-7 are fixedly connected by piercing and crimping and are electrically connected to corresponding parts of the S-phase connection part 22-2 coated by the upper insulation layer 1 and the lower insulation layer 3 of the W-phase printing part 3-3, and pierce the lower insulation layer 3 downwards to form riveting fixed connection.

The T-phase electric connection pieces 4-8 are fixedly connected by piercing and crimping and are electrically connected to corresponding parts of the T-phase connection parts 23-2 coated by the upper insulation layer 1 and the lower insulation layer 3 of the W-phase printing part 3-3, and the lower insulation layer 3 is pierced downwards to form riveting fixed connection.

The U-phase connecting portion 21-1 of the W-phase printing portion 3-3 is electrically connected to the U-phase connecting portion 21-1 of the V-phase printing portion 3-2, and the U-phase connecting portion 21-1 of the V-phase printing portion 3-2 is electrically connected to the U-phase connecting portion 21-1 of the U-phase printing portion 3-1.

The R-phase connection part 21-2 of the W-phase printing part 3-3 is electrically connected to the R-phase connection part 21-2 of the V-phase printing part 3-2, and the R-phase connection part 21-2 of the V-phase printing part 3-2 is electrically connected to the R-phase connection part 21-2 of the U-phase printing part 3-1.

The U-phase conductive heating strips 21 are arranged on the U-phase printing part 3-1 in an S-shaped arrangement mode, the head ends of the U-phase conductive heating strips 21 are electrically connected with the U-phase connecting part 21-1 of the U-phase printing part 3-1, and the tail ends of the U-phase conductive heating strips 21 are electrically connected with the R-phase connecting part 21-2 of the U-phase printing part 3-1.

The V-phase connection part 22-1 of the W-phase printing part 3-3 is electrically connected to the V-phase connection part 22-1 of the V-phase printing part 3-2.

The S-phase connection part 22-2 of the W-phase printing part 3-3 is electrically connected to the S-phase connection part 22-2 of the V-phase printing part 3-2.

The V-phase conductive heating strips 22 are arranged on the V-phase printing part 3-2 in an S-shaped arrangement mode, the head ends of the V-phase conductive heating strips 22 are electrically connected with the V-phase connecting part 22-1 of the V-phase printing part 3-2, and the tail ends of the V-phase conductive heating strips 22 are electrically connected with the S-phase connecting part 22-2 of the V-phase printing part 3-2.

The W-phase conductive heating strips 23 are arranged on the W-phase printing part 3-3 in an S-shaped arrangement mode, the head ends of the W-phase conductive heating strips 23 are electrically connected with the W-phase connecting part 23-1 of the W-phase printing part 3-3, and the tail ends of the W-phase conductive heating strips 23 are electrically connected with the T-phase connecting part 23-2 of the W-phase printing part 3-3.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. A three-phase electric heating film is characterized in that: the heating chip comprises an upper insulating layer, a heating core layer, a lower insulating layer and an electric connecting chip assembly; the heating core layer is coated between the upper insulating layer and the lower insulating layer;

the heating core layer comprises a U-phase connecting part, a V-phase connecting part, a W-phase connecting part and three conductive heating strips, wherein the three conductive heating strips are respectively called as the U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip according to different phases electrically connected with the three conductive heating strips; the U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip are connected with three-phase loads of the corresponding U-phase connecting part, V-phase connecting part and W-phase connecting part in a star connection or a triangular connection; the electric connection sheet assembly comprises a U-phase electric connection sheet, a V-phase electric connection sheet and a W-phase electric connection sheet; the U-phase electric connecting sheet is fixedly connected and electrically connected with the U-phase connecting part coated by the upper insulating layer and the lower insulating layer; the V-phase electric connecting piece is fixedly connected and electrically connected with the V-phase connecting part coated by the upper insulating layer and the lower insulating layer; the W-phase electric connection piece is fixedly connected and electrically connected with the part of the W-phase connection part coated by the upper insulating layer and the lower insulating layer.

2. The three-phase electric heating film according to claim 1, characterized in that: the three conductive heating strips are arranged in an S shape, and the distances among the parts which are parallel to each other in the front-back direction are reduced from inside to outside on the whole; the head end of the U-phase conductive heating strip is electrically connected with the U-phase connecting part; the head end of the V-phase conductive heating strip is electrically connected with the V-phase connecting part; the head end of the W-phase conductive heating strip is electrically connected with the W-phase connecting part; the tail ends of the U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip are electrically connected with each other.

3. The three-phase electric heating film according to claim 2, characterized in that: the zero line connecting part is also included; the electric connection sheet assembly also comprises a zero line electric connection sheet; the tail ends of the U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip are electrically connected with the zero line connecting part through the electric connecting heating strips; the zero line electric connection sheet is fixedly connected and electrically connected with the corresponding part of the zero line connection part coated by the upper insulating layer and the lower insulating layer.

4. The three-phase electric heating film according to claim 2, characterized in that: the lower insulating layer is provided with a first printing part, a second printing part and a third phase printing part from left to right in sequence; the heating core layer also comprises an electric connection heating strip; electrically connecting the heat-emitting strips around the edges of the first printing portion, the second printing portion and the third printing portion;

the first printing portion, the second printing portion and the third printing portion are provided with a U-phase connecting portion, a V-phase connecting portion and a W-phase connecting portion;

the U-phase connecting part of the first printing part is electrically connected with the U-phase connecting part of the second printing part; the U-phase conductive heating strips are arranged on the front parts of the first printing part and the second printing part in an S shape; one end of the U-phase conductive heating strip of the first printing part is electrically connected with the U-phase connecting part of the first printing part, and the other end of the U-phase conductive heating strip of the first printing part is electrically connected with the electric connecting heating strip; one end of the U-phase conductive heating strip of the second printing part is electrically connected with the U-phase connecting part of the second printing part, and the other end of the U-phase conductive heating strip of the second printing part is electrically connected with the electric connecting heating strip;

the W-phase connecting part of the first printing part is electrically connected with the W-phase connecting part of the second printing part; the W-phase conductive heating strips are arranged on the rear parts of the first printing part and the second printing part in an S-shaped mode and are symmetrically arranged with the U-phase conductive heating strips of the first printing part and the second printing part in a front-back mode; one end of the W-phase conductive heating strip of the first printing part is electrically connected with the W-phase connecting part of the first printing part, and the other end of the W-phase conductive heating strip of the first printing part is electrically connected with the electric connecting heating strip; one end of the W-phase conductive heating strip of the second printing part is electrically connected with the W-phase connecting part of the second printing part, and the other end of the W-phase conductive heating strip of the second printing part is electrically connected with the electric connecting heating strip;

the V-phase connecting part of the first printing part is electrically connected with the V-phase connecting part of the second printing part, and the V-phase connecting part of the second printing part is electrically connected with the V-phase connecting part of the third printing part;

the V-phase conductive heating strips are arranged on the third printing part in an S-shaped manner and are symmetrically arranged in the front and back direction; one end of the V-phase conductive heating strip positioned in front of the third printing part is electrically connected with the V-phase connection part of the first printing part, and the other end of the V-phase conductive heating strip is electrically connected with the electric connection heating strip; one end of the V-phase conductive heating strip positioned at the rear part of the third printing part is electrically connected with the V-phase connection part of the first printing part, and the other end of the V-phase conductive heating strip is electrically connected with the electric connection heating strip.

5. The three-phase electric heating film according to claim 2, characterized in that: the lower insulating layer is provided with a U-phase printing part, a V-phase printing part and a W-phase printing part from left to right in sequence; the heating core layer also comprises an electric connection heating strip; the electric connection heating strip is continuously arranged along the back edges of the U-phase printing part, the V-phase printing part and the W-phase printing part; the U-phase printing part, the V-phase printing part and the W-phase printing part are all provided with a U-phase connecting part, a V-phase connecting part and a W-phase connecting part;

the U-phase conductive heating strips are arranged on the U-phase printing part in an S shape; the head end of the U-phase conductive heating strip is electrically connected with the U-phase connection part of the U-phase printing part, and the tail end of the U-phase conductive heating strip is electrically connected with the electric connection heating strip positioned on the printing part;

the V-phase connecting part of the V-phase printing part is electrically connected with the V-phase connecting part of the U-phase printing part, the V-phase conductive heating strips are arranged on the V-phase printing part in an S shape, the head ends of the V-phase conductive heating strips are electrically connected with the V-phase connecting part of the V-phase printing part, and the tail ends of the V-phase conductive heating strips are electrically connected with the electric heating strips positioned on the V-phase printing part;

the W looks connecting portion of V looks printing portion are connected with the W phase connection portion electricity of U looks printing portion, and the W looks connecting portion of W looks printing portion is connected with the W phase connection portion electricity of V looks printing portion, and the electrically conductive heating strip of W looks is the S type and arranges the setting on W looks printing portion, and the head end of the electrically conductive heating strip of W looks is connected with the W phase connection portion electricity of W looks printing portion, and the end of the electrically conductive heating strip of W looks is connected with the electricity that is located W looks printing portion and is received the heating strip electricity and be connected.

6. The three-phase electrothermal film of claim 5, wherein: the zero line connecting part is also included; the electric connection sheet assembly also comprises a zero line electric connection sheet; the tail ends of the U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip are electrically connected with the zero line connecting part through the electric connecting heating strips; the zero line electric connection sheet is fixedly connected and electrically connected with the corresponding part of the zero line connection part coated by the upper insulating layer and the lower insulating layer.

7. The three-phase electric heating film according to claim 1, characterized in that: the three conductive heating strips are arranged in an S shape; one end of the U-phase conductive heating strip is electrically connected with the U-phase connecting part, and the other end of the U-phase conductive heating strip is electrically connected with the V-phase connecting part; one end of the V-phase conductive heating strip is electrically connected with the V-phase connecting part, and the other end of the V-phase conductive heating strip is electrically connected with the W-phase connecting part; one end of the W-phase conductive heating strip is electrically connected with the W-phase connecting part, and the other end of the W-phase conductive heating strip is electrically connected with the U-phase conductive heating strip; all the conductive heating strips are always arranged in parallel.

8. A three-phase electric heating film is characterized in that: the heating chip comprises an upper insulating layer, a heating core layer, a lower insulating layer and an electric connecting chip assembly; the heating core layer is coated between the upper insulating layer and the lower insulating layer;

the heating core layer comprises a U-phase connecting part, a V-phase connecting part, a W-phase connecting part, an R-phase connecting part, an S-phase connecting part, a T-phase connecting part and three conductive heating strips, wherein the three conductive heating strips are respectively called as the U-phase conductive heating strip, the V-phase conductive heating strip and the W-phase conductive heating strip according to the difference of phases electrically connected with the three conductive heating strips; the three conductive heating strips are arranged in an S shape; the head end of the U-phase conductive heating strip is electrically connected with the U-phase connecting part, and the tail end of the U-phase conductive heating strip is electrically connected with the R-phase connecting part; the head end of the V-phase conductive heating strip is electrically connected with the V-phase connecting part, and the tail end of the V-phase conductive heating strip is electrically connected with the S-phase connecting part; the head end of the W-phase conductive heating strip is electrically connected with the W-phase connecting part, and the tail end of the W-phase conductive heating strip is electrically connected with the T-phase connecting part;

the electric connection sheet assembly comprises a U-phase electric connection sheet, a V-phase electric connection sheet, a W-phase electric connection sheet, an R-phase electric connection sheet, an S-phase electric connection sheet and a T-phase electric connection sheet; the U-phase electric connecting sheet is fixedly connected and electrically connected with the U-phase connecting part coated by the upper insulating layer and the lower insulating layer; the V-phase electric connecting piece is fixedly connected and electrically connected with the V-phase connecting part coated by the upper insulating layer and the lower insulating layer; the W-phase electric connection piece is fixedly connected and electrically connected with the part of the W-phase connection part coated by the upper insulating layer and the lower insulating layer; the R-phase electric connecting sheet is fixedly connected and electrically connected to the corresponding part of the R-phase connecting part coated by the upper insulating layer and the lower insulating layer; the S-phase electric connecting sheet is fixedly connected and electrically connected with the corresponding part of the S-phase connecting part coated by the upper insulating layer and the lower insulating layer; the T-phase electric connection piece is fixedly connected and electrically connected with the corresponding part of the T-phase connection part coated by the upper insulating layer and the lower insulating layer.

9. The three-phase electrothermal film of claim 8, wherein: the lower insulating layer is sequentially provided with a U-phase printing part, a V-phase printing part and a W-phase printing part from right to left;

the U-phase connecting part of the W-phase printing part is electrically connected with the U-phase connecting part of the V-phase printing part, and the U-phase connecting part of the V-phase printing part is electrically connected with the U-phase connecting part of the U-phase printing part;

the R phase connecting part of the W phase printing part is electrically connected with the R phase connecting part of the V phase printing part, and the R phase connecting part of the V phase printing part is electrically connected with the R phase connecting part of the U phase printing part;

the U-phase conductive heating strips are arranged on the U-phase printing part in an S-shaped arrangement mode, the head ends of the U-phase conductive heating strips are electrically connected with the U-phase connecting part of the U-phase printing part, and the tail ends of the U-phase conductive heating strips are electrically connected with the R-phase connecting part of the U-phase printing part;

the V-phase connecting part of the W-phase printing part is electrically connected with the V-phase connecting part of the V-phase printing part; the S-phase connecting part of the W-phase printing part is electrically connected with the S-phase connecting part of the V-phase printing part;

the V-phase conductive heating strips are arranged on the V-phase printing part in an S-shaped arrangement mode, the head ends of the V-phase conductive heating strips are electrically connected with the V-phase connecting part of the V-phase printing part, and the tail ends of the V-phase conductive heating strips are electrically connected with the S-phase connecting part of the V-phase printing part;

the W-phase conductive heating strips are arranged on the W-phase printing portion in an S-shaped mode, the head ends of the W-phase conductive heating strips are electrically connected with the W-phase connection portion of the W-phase printing portion, and the tail ends of the W-phase conductive heating strips are electrically connected with the T-phase connection portion of the W-phase printing portion.

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