JP2009185563A - Heater system and heater unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mechanically and electrically connect a heater unit by a simple operation. <P>SOLUTION: This heater system comprises: the heater unit 50 having an electric heater 15; and a connecting link 10 electrically and mechanically connecting an adjacent heater unit 50 (c). The heater unit 50 is formed by mounting the waterproof-coated electric heater 15 on the upper surface 32b of a block-like base body 31 (a), and forming a connection recess 34 and a fitting groove 38 in the bottom surface 32 of a base body 31. The second terminal 21 of the electric heater 15 is disposed in each connection recess (b). The heater units 50 are arranged on a ground 52, both ends of the connecting link 10 is inserted into and connected to the connection recess 34, and the second terminal 21 of the heater unit 50 positioned at both ends electrically connected in series is connected to a power source. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heater unit that is laid on a road, a park, a garden, or the like and used mainly for melting snow, and a heater system that is configured by connecting the heater units.

  In the first conventional example, while fitting the convex portion on the front side and the concave portion on the back side of the block having the heating element to each other, the adjacent blocks are structurally connected, and the PC steel bars are inserted and tensioned. An integral block connector was configured (Patent Document 1). In this case, the adjacent blocks were electrically connected to the power source using the bottom groove and the central vertical hole.

  Further, in the second conventional example, a flexible connection tube having a one-touch connection connector is attached to the long side of the plate-like block, and adjacent plate-like blocks are electrically connected by the one-touch connection connector (patent) Reference 2). In this case, a connection tool is attached to the end of a string body (wire, chain) for cutting prevention longer than the flexible connection pipe near the flexible connection pipe, and the connection tools of adjacent plate blocks are connected. Structurally connected.

In the third conventional example, in particular, without using mechanical connecting means, block heaters provided with notches at the four corners are laid down, and the lead wires are formed in a space formed by overlapping the notches at the four corners. Are electrically connected to each other (Patent Document 3).
JP-A-10-237808 JP-A-11-166203 JP 2002-242118 A

  Among the prior arts, in the first and second conventional examples, both mechanical and structural connection means and electrical connection means are separately provided, and both electrical connection and mechanical connection are provided. There was a problem that required connecting work. In addition, in the third conventional example, since there is no mechanical connection, there is a strong possibility that the lead wire will be disconnected due to the block heater misalignment. There was a problem that was limited.

  However, the present invention relates to a heater system or a heater unit to be used by connecting the first connecting portions at both ends of the connecting link to the second connecting portion of the heater unit. 2 electrical connection terminals) are provided, so that the above problems are solved.

That is, the present invention is a system that uses a plurality of heater units, each having a base body provided with an electric heater, connected by a connecting link, and has all the following requirements. .
(1) The connecting link has first connecting portions formed at both ends of the base, and first electric connection terminals are provided in the first connecting portions, respectively, and the first electric connecting terminals are disposed in the base. Connected with electrical wiring.
(2) The heater unit is formed with at least two second connection portions that can be water-tightly fitted to one first connection portion of the connecting link on the outer peripheral portion of the base body. A second electrical connection terminal that can be connected to the first electrical connection terminal is formed in the second connection part. Both ends of the electric heater are connected to the second electric connection terminals, respectively.
(3) One second connection portion of one heater unit and one second connection portion of another heater unit are connected by fitting the first connection portion of the connecting link, and the first connection portion An electrical connection terminal is connected to the second electrical connection terminal.
(4) Two heater units are selected from the heater units to which the connecting link is attached, and the selected heater unit supplies power to the second electrical connection terminals of the second connecting portion to which the connecting link is not attached. A circuit is connected to form a closed circuit from the power supply circuit, the electric heater of each heater unit, and the electric wiring of the connecting link.

In the invention of the heater system, the heater system is characterized by having all of the following requirements.
(1) In the heater unit, one of the second connecting portions is a main second connecting portion, and the other is a slave second connecting portion.
(2) An electric heater is formed in a straight line, one end of the electric heater is connected to a second electric connection terminal in the main second connecting portion, and the other end of the electric heater is connected in the sub second connecting portion. Connect to the second electrical connection terminal.

Another invention is a heater unit that is used by being connected by a connecting link, and has all the following requirements.
(1) On the outer peripheral portion of the base body incorporating the linear electric heater, second connection portions that can fit the first connection portion of the connecting link in a watertight manner are formed at a plurality of locations.
(2) An electrical connection terminal that is electrically connected to the connecting link is provided in the second connecting portion.
(3) One end of the electric heater is connected to an electrical connection terminal in the main second connection portion, with one of the plurality of second connection portions being a main second connection portion and the other being a secondary second connection portion. The other end of the electric heater is connected to the electric connection terminal in the slave second connecting portion.

Moreover, in the invention of the heater unit, the heater unit has all the following requirements.
(1) At least three second connecting portions are formed on the base body, one of the second connecting portions is a main second connecting portion, and the other second connecting portion is a slave second connecting portion. The second electrical connection terminal of the main second connection portion is a main second electrical connection terminal, and the second electrical connection terminal of the slave second connection portion is a secondary second electrical connection terminal.
(2) A main two connecting portion is provided on one side of the base body, and a second connecting portion is provided on the other side,
(3) The electric heater has a planar configuration, the main second electric connection terminal is connected to one end of the electric heater, and at least two branch lines are integrally formed at the other end of the electric heater. The slave second electrical connection terminal is connected to the end of the wire.

  In the present invention, since the second electrical connection terminal is provided in the second connection part of the heater unit and the first electrical connection terminal is provided in the first connection part of the connecting link, the first connection part of the connecting link is connected to the first connection part of the heater unit. If the mechanical connection work for connecting the two connection parts is performed, the electrical connection work can be automatically completed. Therefore, there is an effect that the connecting operation of the adjacent heater units can be easily and efficiently advanced.

(1) The heater system 60 includes a plurality of heater units 50 and 50 provided with the electric heater 15 and connecting links 10 and 10 that can connect adjacent heater units 50.

(2) The connecting link 10 is formed with connecting convex portions (first connecting portions) 4 and 4 at both ends of the link base 1, and a first terminal 8 is provided on the upper end surface 5 of the connecting convex portions 4 and 4. is there. The first terminals 4 and 4 of both connecting projections are connected to each other by lead wires 11 embedded in the link base 1. A rubber ring 7 is wound around the side surface 6 of the connecting convex portion 4.

(3) The heater unit 50 is configured by laminating an electric heater 15, a waterproof sheet 41, and a rubber layer 43 on an upper surface 32b of a block-like (short regular quadrangular prism) base body 31 (FIG. 1 (a)). (C)).
A cylindrical connecting recess (second connecting portion) 34 is formed near the side surface 33 on the bottom surface 32 of the base body 31, and a fitting groove 38 is formed from the connecting recess 34 toward the side surface 44. The second terminal 21 of the electric heater 15 is located on the top surface 36 of each connection recess 34, 34 and faces the connection recess 34. Accordingly, a coupling recess 34 and a fitting groove 38 are formed on all four side surfaces 33 of the base body 31 (FIG. 1B).
The electric heater 15 protects the heating element 16 formed in a sheet shape in which a belt is bent on a plane with a protective sheet 23, and is waterproof and shock resistant. In addition, the heating element 16 is provided with a second terminal 21 (main second terminal 21a) at one end 17, the other end 18 is located near the center of the plane, and the three branching parts 19 are integrally formed from the other end 18. It is connected continuously. In addition, a second terminal 34 (secondary terminal 21b) is provided at each of the distal end portions 19a and 19a of the disassembling portion 19. Each of the second terminals 21 and 21 faces one another in a different connecting recess 34 (FIGS. 2 and 1B).

(4) The heater units 50 and 50 are arranged on the ground 52, and the connecting recesses 34 and 34 are opposed to each other by the adjacent heater units 50 and 50. The connecting link 10 is passed to the opposed heater units 50, 50, and the connecting projections 4, 4 of the connecting link 10 are inserted into the connecting recesses 34, 34. At this time, the first terminal 8 of the connecting convex portion 4 is connected to the second terminal 21 in the connecting concave portion 34.
Moreover, the rubber ring 7 of the connection convex part 4 presses and closely adheres the hole wall 35 of the connection concave part 34, and the watertightness of the connection between the first terminal 8 and the second terminal 21 can be maintained. Further, since the link substrate 1 of the connecting link 10 is fitted in the fitting groove 38 of the heater unit 50, the connection between the connecting link 10 and the heater unit 50 is not displaced, and the adjacent heater units 50, 50 are mechanically connected. Are physically connected (FIG. 3).
If all the heater units 50 and 50 are connected by the connecting link 10 and the heater units 50a and 50b located at the ends in electrical series are connected to a power source, the heater unit 60 of the present invention is obtained (FIG. 5).

  Embodiments of the present invention will be described with reference to the drawings.

[1] Basic configuration of heater system 60

  The heater system 60 according to the present invention includes planar square heater units 50 and 50 and a connecting convex portion (first connecting portion) that can be fitted into a connecting concave portion (second connecting portion) 34 provided on the lower surface of the four sides of the heater unit 50. 4 and a power supply circuit 57 (FIG. 5). The configurations of the heater unit 50 and the connecting link 10 will be described below.

[2] Configuration of connecting link 10

(1) The both ends of the flat rectangular base material part 2 are bulged to form the partial circular parts 3 and 3 on a flat surface, thereby integrally forming the rigid link substrate 1. Cylindrical connecting projections 4 are formed on the partial circular portions 3 and 3 of the link substrate 1, respectively. Both connecting projections 4, 4 have a sealing rubber ring 7 attached to the outer periphery of the side surface 6, and a first terminal (first electrical connection terminal) 8 attached to the upper end surface 5. The first terminals 8 of both the connecting protrusions 4 and 4 are connected by the connecting protrusion 4 and a lead wire (electric wiring) 11 passing through the link substrate 1 to constitute a connecting link 10 (FIG. 3A (B)). Moreover, both connection convex parts 4 and 4 are formed in the state which faced up.

(2) Further, the connecting link 10A is configured with a structure in which the lead wire 11 and / or the first terminals 8 and 8 are not provided.

(3) the length L ₃ between the first terminal 8,8 of the connecting link 10, corresponding to the gap D of the heater unit adjacent previously set,
L ₃ = D + (2 × L ₂ )
(FIG. 3). L ₂ is the length from the peripheral edge 32 a of the base body 31 to the second terminal set by the heater unit 50.

[3] Configuration of heater unit 50

(1) The heater unit 50 has a substantially square shape with one side (2 × L ₁ ), and has an electric heater (PET heater) 15 and a waterproof sheet (for example, polyvinyl chloride) on the upper surface 31b of the concrete base body 31. 41 and a rubber layer 43 are laminated in order (FIG. 1C).

(2) The electric heater 15 is configured by laminating both surfaces of a sheet-like heating element 16 with protective sheets 23 and 23 made of PET resin (FIG. 2).

  A main second terminal (main second electrical connection terminal) 21a is provided at the center of one side at four peripheral portions of the substantially square protective sheet 23, and a second terminal (secondary electrical connection terminal) is provided at the center of the other three sides. ) 21b and 21b are provided. The heating element 16 has a linear shape with both ends and a band having a predetermined width, one end 17 is connected to the main first connection terminal 21a, and the other end 18 is positioned near the center of gravity of the protective sheet 23, and radially from the center of gravity. Three branch portions 19 and 19 are connected in series, and the tip portions 19a and 19a of each branch portion 19 are connected to the first terminal 21b, respectively.

  The heating element 16 has a planar shape meandering in a band shape in plan view, and is uniformly distributed in each area on a protective sheet 23 that is divided into approximately four equal parts by a line connecting the opposing second terminals 21 and 21b. It has a meandering shape so as to be buried in and not overlapping (FIG. 2). Note that the shape of the heating element 16 is arbitrary (not shown) as long as it is arranged so as to occupy as much area as possible on the plane.

  The protective sheet 23 is integrally formed by connecting a protruding piece with a through hole in a position shifted from the center (position shifted from each first terminal) on each side.

  Further, although the protective sheet 23 of the electric heater 15 is made of PET, other materials can be adopted as long as the heating element 16 is protected from impact and moisture and is not dissolved by heating of the heating element 16.

(3) The base body 31 is made of concrete and forms, from the bottom surface 32, a columnar connection recess (second connection portion) 34 with the second terminal 21 as the center of the circle. The connection recess 34 is formed so that the connection protrusion 4 of the connecting link 10 can be inserted so that the entire circumference of the rubber ring 7 can press the hole wall 35 of the connection recess 34 (FIG. 3B). Further, the lower surface side of the connecting concave portion 34 bulges to form a large-diameter columnar massive portion 37 so that the partial circular portion 3 of the link substrate 1 of the connecting link 10 can be fitted (FIG. 1 ( b), FIG. 3).

  On the bottom surface 32 of the base body 31, a fitting groove 38 into which the base material portion 2 of the link substrate 1 of the connecting link 10 can be fitted from the peripheral edge 32a toward the enormous portion 37 of the connecting recess 34 is formed.

  In the above description, the second terminal 21 faces the top surface (bottom surface) 36 of the connecting recess 34. The connecting recess 34 where the main second terminal 21a is located is referred to as a main connecting recess 34a, and the connecting recess 34 where the slave second terminal 21b is located is referred to as a slave connecting recess 34b.

  In the above description, the material of the base body 1 is a material that is not melted by the electric heater 15 and is not limited to concrete as long as the electric heater 15 can be supported, and any material such as various resins, various metals, and wood can be used. For example, various blocks for paving, various water-permeable blocks, and the like can be used, and these materials can be appropriately combined (not shown).

(4) Each second terminal 21a, at 21b, the distance _{L 2} of the (center of the connecting recess 34) 21a, to 21b of the base member periphery of the bottom surface 32 of the 31 respective second terminals from (protective sheet periphery) 32a is Are formed identically.

  In addition, the inner wall of the connecting recess 34 is covered with a cylindrical resin material or coated with a waterproof material, and is waterproofed so that the electrical connection between the terminals 21a and 21b is not affected. It is. Therefore, the inner wall of the connecting recess 34 is formed smoothly.

(5) The rubber layer 43 is formed by laminating a second rubber layer 45 in which waste wood chips and chip rubber are mixed on the upper surface of the first rubber layer 44 made of waste tire rubber (FIG. 1 (c)). In this case, the pedestrian and the vehicle can keep safety without slipping in any case such as when the entire rubber layer 43 is dry, wet with rain, or with snow. Furthermore, even when an impact is applied from the surface, the electric heater 15 is protected by absorbing it.

  In the above description, the rubber layer 43 is not limited to the above-described configuration, and may be configured from a single layer (not shown) as a configuration in which chip rubber and waste wood chips are mixed. Further, the rubber layer 43 (the first rubber layer 44 and the second rubber layer 45) can be omitted (not shown).

[4] Configuration of heater system 60

  Next, the heater system 60 using the heater units 50, 50, the connecting links 10, 10, and the power supply circuit 57 will be described.

(1) While the heater units 50 and 50 are placed on the ground surface 52 (FIGS. 1 (c) and 3 (b)), the connecting link 10 is attached to the adjacent heater units 50 and 50 to be main connected. It arrange | positions so that the recessed part 34a and the secondary connection recessed part 34b may face each other. That is, it arrange | positions so that main connection recessed parts 34a and 34a may not face each other with arbitrary heater units 50 and 50. FIG.

(2) In the adjacent heater units 50, 50, the connecting link 10 is attached between the main connection recess 34 a of one heater unit 50 and the slave connection recess 34 b of the other heater unit 50.

  At this time, just by inserting the connecting convex portions 4 and 4 of the connecting link 10 into the connecting concave portions 34a and 34b from the bottom surface 32 side of the heater unit 50, the adjacent heater units 50 and 50 maintain the gap D, It is connected so as not to move. Further, the second terminal 21 and the first terminal 8 are electrically connected by simply inserting the connecting convex portion 4 into the connecting concave portion 34, and the adjacent heater units 50 and 50 are electrically connected.

  At this time, since the rubber ring 7 of the connecting convex portion 4 is in close contact within each connecting concave portion 34 (34a, 34b), the space on the top surface 36 side of the connecting concave portion 34 is sealed in a watertight manner. 8. The waterproofness of the connection part of the second terminal 21 can be maintained. Moreover, since the inner wall of each connection recessed part 34 (34a, 34b) is coated with resin clothing or paint, it is formed smoothly and high water tightness is ensured.

  In addition, since the base material portion 2 and the partial circular portion 3 of the link substrate 1 of the connecting link 10 are fitted into the enormous portion 37 and the fitting groove 38 of the heater unit 50, the physical relationship between the adjacent heater units 50 and 50 is achieved. Keeps the connections connected. Furthermore, since the bottom surface 32 of the heater unit 50 and the lower surface 1a of the connecting link link substrate 1 are formed substantially flush with each other, if the ground 52 is prepared, physical connection is maintained (FIG. 3B). ). Accordingly, at the same time, the electrical connection between the first terminal 8 and the second terminal 21 can be maintained.

(3) Further, the adjacent heater units 50 and 50 are connected in a single stroke in a linear manner by connecting the main connection recess 34a of one heater unit 50 and the slave connection recess 34b of the other heater unit 50 in a straight line. From the power supply circuit 57, the main second terminal 21a of the main connection recess 34a of the heater unit 50a located at one end of the series and the slave second terminal 21b of the slave connection recess 34b of the heater unit 50b located at the other end are respectively connected. Power supply cables 58 and 58 are connected to form an electrically series closed circuit to constitute a heater system 60 (FIG. 5). The power supply circuit 57 is optional, and can be appropriately selected and used in accordance with the heating element 16 of the heater unit 50 to be used.

(4) In the adjacent heater units 50, 50, the connecting link 10A having no REIT line can be attached at the portion where the secondary coupling recesses 34b, 34b face each other (FIG. 5A). In this case, it is desirable to use the connecting link 10A without the lead wire 11 in order to configure a closed circuit electrically connected in a single stroke, but the normal (with lead wire) connecting link 10 is used. (Not shown).

  Further, when the amount of electric power (W number) necessary for melting snow can be secured, or when the amount of electric power is limited due to the capability of the power supply circuit 57, a heater unit 50 that is not related to melting snow is necessary for walking. Alternatively, the connecting links 10 and 10 for forming an electrically series closed circuit and the mechanically connected connecting link 10A may be used in combination.

(5) With the heater units 50 and 50 to which the connecting link 10 is connected, the protruding piece 25 and the connecting link 10 are fixed through the string 53 or the like through the through hole 26 of the protruding piece 25 of the protective sheet 23 positioned immediately above the connecting link 10. By doing so, the connection between the connecting link 10 and the heater unit 50 can be more reliably maintained.

(6) In the heater system 60 configured as described above, the connection concave portion 34 of each heater unit 50 and the connection convex portion 4 of the connecting link 10 are connected via the rubber ring 7, while ensuring waterproofness. Some looseness can be secured. Therefore, even if the plane of the ground 52 on which the heater units 50 and 50 are constructed is somewhat wavy, the connected heater units 50 and 50 can be followed. In this case, if the link substrate 1 of the connecting link 10 is made of a flexible material, the following effect can be further improved.

  In addition, since the connecting convex portion 4 is formed on the connecting link 10 and the connecting concave portion 34 is formed from the bottom surface 32 side of the heater unit 50, one of the connected heater units 50 is broken. However, it is possible to easily remove and repair or replace only the failed heater unit 50 by raising it upward. Also, when searching for a failed heater unit 50 in the heater system 60, the central heater unit 50 is first removed and checked for failure. Since the heater unit 50 can be taken out and checked in the same manner, the failure location can be found in a short time.

  Further, if the power supply cable 58 of the power supply circuit 57 is connected only to the heater units 50 and 50 on both sides in series, the heater system 60 can be configured. Therefore, the number of places where the power supply circuit 57 is connected to the heater units 50 and 50 is reduced. Thus, the heater system 60 can be easily configured.

  Further, since the heater unit 50 is assembled by combining the base body and the electric heater in the vertical direction, the production line can be easily mechanized and the production work can be made efficient.

[5] Other embodiments

(1) In the above-described embodiment, the main connection recess 34a and the sub connection recess 34b of the heater unit 50 can be formed in different shapes (not shown). In this case, the connecting projection 4 of the connecting link 10 is also formed in a different shape so that one of the connecting projections 4 can be fitted to the main coupling recess 34a and the other of the coupling projections 4 can be fitted to the secondary coupling recess 34b. And When formed in this way, the heater units 50, 50 are always connected to the main connection recess 34a and the sub connection recess 34b, so that the heater system 60 with high snow melting efficiency can be assembled efficiently.

(2) Further, in the above embodiment, the adjacent heater units 50 can be connected by linearly connecting the main connection recess 34a and the slave connection recess 34b of the other heater unit 50 in a single stroke. Although it is preferable because the heat generation effect of the connected heater units 50 can be maximized, other connections may be used. For example, if the adjacent heater units 50 and 50 are connected by the connecting link 10, selection of the master and the slave (connection between the main connection recesses 34a and 34a, connection between the slave connection recesses 34b and 34b), connection after branching, etc. The manner of connection can be arbitrary.

  Further, for example, all of the connection recesses 34a and 34b can be connected by the connecting links 10 and 10 at the edge of the adjacent heater unit 50. In this case, although the thermal efficiency is inferior, Since installation can be performed without considering the orientation, work efficiency can be improved.

(3) In the above-described embodiment, the case where the interval D between adjacent heater units is set has been described. However, the base member 2 of the connecting link 10 can be configured so that D≈0 (FIG. Not shown). In this case, it is desirable to cover the surface (side surface 33 of the base body 31) with which the adjacent heater units 50 and 50 come into contact with each other with an elastic material.

(4) Further, in the above embodiment, when there is a possibility of moving the heater unit 50 once installed, the connecting link 10 is divided into the partial circular part 3 having the connecting convex part 4 and the short base part 2. The short base portion 2 is divided into flexible connecting portions 12 made of a flexible material in which the wire 11 is embedded and having a certain length (FIG. 4).

In this case, in the initial installation state, the flexible connecting portion 12 is bent (FIGS. 4A and 4B). When the heater unit is moved, the length L ₄ of the flexible connecting portion 12 is set. As a limit, the position can be changed (FIG. 4C).

  In addition, the connecting link 10 using the flexible connecting portion 12 is previously arranged at a distant position, or when it is arranged at a position where the connecting concave portion 34 is not opposed by the adjacent heater units 50 and 50 (the heater is inclined). When the unit 50 is rotated), the heater unit 50 can be connected (see FIG. 4C). For example, the present invention can be applied to a case where the heater unit is arranged in a stepping stone shape in a house garden or the like (for example, FIG. 5B).

(5) In the above embodiment, it is preferable to provide the connecting projection 4 on the connecting link 10 and the connecting recesses 34, 34 on the heater unit 50. However, the structure is arbitrary as long as they can be connected to each other. For example, a connecting recess can be formed in the connecting link 10, a slightly wider recess can be formed in the bottom surface of the heater unit 50, and a connecting protrusion can be formed in the recess (not shown).

(6) In the above embodiment, the heater unit 50 is a flat square, but if it has the connecting recesses 34, 34, it can have any flat shape such as a rectangle, a pentagon, a circle, or a natural stone.

(7) Moreover, in the said Example, although the heater unit 50 connected to a power supply circuit is arbitrary,

In the heater unit of the present invention, (a) is a plan view partially broken, (b) is a bottom view, and (c) is a front view. It is a top view of the electric heater used for the heater unit of this invention. It is a connecting link of this invention, (a) is a top view, (b) is a front view. FIG. 4 is another connecting link of the present invention, in which (a) is a plan view, (b) is a front view, and (c) is a reduced plan view of another use state. (A) (b) is the schematic plan view explaining the heater system of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Link substrate 2 Base part of link substrate 3 Partial circular part of link substrate 4 Connection convex part (1st connection part)
5 Upper end surface of connecting convex portion 6 Side surface of connecting convex portion 7 Rubber ring 8 of connecting convex portion First terminal (first electric connection terminal)
DESCRIPTION OF SYMBOLS 10 Connecting link 11 Lead wire 12 Flexible connection part 15 Electric heater 16 Heating element 17 of an electric heater One end 18 of a heating element 19 The other end 19 of a heating element The branch part 19a of a heating element The end part 21 of the branching part of a heating element Second electrical connection terminal)
21a Main second terminal (main second electric connection terminal)
21b Secondary second terminal (secondary electrical connection terminal)
23 Protective sheet 25 of electric heater Protective sheet projection piece 26 Projection piece through hole 31 Base body 32 Base pair bottom surface 32a Base body bottom surface 33 Base body side surface 34 Connection recess (second connection portion)
34a Main connection recess 34b Secondary connection recess 35 Hole wall 36 of the connection recess 37 Enlarged portion 38 of the connection recess 38 Fitting groove 41 Waterproof sheet 43 Rubber layer 44 First rubber layer 45 of the rubber layer Second of the rubber layer Rubber layer 50 Heater unit 57 Power supply circuit 58 Power supply cable 60 of power supply circuit Heater system

Claims (4)

A heater system in which a plurality of heater units provided with an electric heater on a base body are connected and used by a connecting link, and all the following requirements are satisfied.
(1) The connecting link has first connecting portions formed at both ends of the base, and first electric connection terminals are provided in the first connecting portions, respectively, and the first electric connecting terminals are disposed in the base. Connected with electrical wiring.
(2) The heater unit is formed with at least two second connection portions that can be water-tightly fitted to one first connection portion of the connecting link on the outer peripheral portion of the base body.
A second electrical connection terminal that can be connected to the first electrical connection terminal is formed in the second connection part.
Both ends of the electric heater are connected to the second electric connection terminals, respectively.
(3) One second connection portion of one heater unit and one second connection portion of another heater unit are connected by fitting the first connection portion of the connecting link, and the first connection portion An electrical connection terminal is connected to the second electrical connection terminal.
(4) Select two heater units among the heater units to which the connecting links are attached,
With the selected heater unit, connect the power supply circuit to the second electrical connection terminal of the second connecting part to which the connecting link is not attached,
A closed circuit is constituted by the power supply circuit, the electric heater of each heater unit, and the electric wiring of the connecting link. The heater system according to claim 1, comprising all of the following requirements.
(1) In the heater unit, one of the second connecting portions is a main second connecting portion, and the other is a slave second connecting portion.
(2) An electric heater is formed in a straight line, one end of the electric heater is connected to a second electric connection terminal in the main second connecting portion, and the other end of the electric heater is connected in the sub second connecting portion. Connect to the second electrical connection terminal. A heater unit that is connected and used with a connecting link, and has all the following requirements.
(1) On the outer peripheral portion of the base body incorporating the linear electric heater, second connection portions that can fit the first connection portion of the connecting link in a watertight manner are formed at a plurality of locations.
(2) An electrical connection terminal that is electrically connected to the connecting link is provided in the second connecting portion.
(3) One end of the electric heater is connected to an electrical connection terminal in the main second connection portion, with one of the plurality of second connection portions being a main second connection portion and the other being a secondary second connection portion. The other end of the electric heater is connected to the electric connection terminal in the slave second connecting portion. The heater unit according to claim 3, wherein all of the following requirements are satisfied.
(1) At least three second connecting portions are formed on the base body, one of the second connecting portions is a main second connecting portion, and the other second connecting portion is a slave second connecting portion.
The second electrical connection terminal of the main second connection portion is a main second electrical connection terminal, and the second electrical connection terminal of the slave second connection portion is a secondary second electrical connection terminal.
(2) A main two connecting portion is provided on one side of the base body, and a second connecting portion is provided on the other side,
(3) The electric heater has a planar configuration, the main second electric connection terminal is connected to one end of the electric heater, and at least two branch lines are integrally formed at the other end of the electric heater. The slave second electrical connection terminal is connected to the end of the wire.

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