JP5419391B2 - Electric floor heating panel and electric floor heating floor using it - Google Patents

Description

  The present invention relates to an electric floor heating panel in which a heater wire as a heat source is incorporated, and an electric floor heating floor in which a plurality of the electric floor heating panels are electrically connected and laid on a floor base surface.

  While electrically connecting two or more electric floor heating panels that incorporate a heating circuit with heater wires on the back of the wooden substrate, lay them on the floor base and supply the required power to the electric floor heating panel via the controller. Such an electric floor heating floor is known (see Patent Document 1). The controller is equipped with functions such as specifying a heating area, starting and stopping energization, and setting a temperature level in a steady operation mode, thereby ensuring the safety of the electric floor heating floor.

  Further, the heater wire laid on the sheet heating device such as an electric blanket or an electric carpet is composed of first and second heating lines and one detection line, and the first heating line and the detection line. The first melting fault is interposed between the first heating line and the second heating line. At least the second melting fault is interposed between the first heating line and the second heating line, and the melting point of the material of the second melting fault is A three-wire heater wire that is higher than the melting point of the material of the first melting fault is known (see Patent Document 2).

JP 2006-308202 A Japanese Patent Laid-Open No. 10-335046

  In the above-described three-wire heater wire, the current flows back and forth through the first and second heating wires running substantially in parallel in one three-wire heater wire. It becomes possible to cancel each other, and it is possible to suppress the generation of electromagnetic waves from the three-wire heater wire when energized. By using this three-wire heater wire as the heater wire in the electric floor heating panel in which the power source wire and the heater wire are incorporated on the back surface of the wooden substrate, electromagnetic waves are greatly generated from the electric floor heating panel. It can be expected to be avoided.

  However, when an electric floor heating panel is manufactured, a power line attached to the back surface, that is, a power line to which power from an external power source is supplied and a three-wire heater line are connected by two lead wires. However, it is impossible to avoid the generation of electromagnetic waves from the lead wire due to the current flowing through the lead wire. There is a demand for an electric floor heating floor with a more complete countermeasure against electromagnetic waves. For this reason, taking measures to suppress electromagnetic waves generated from the lead wires is a problem to be solved for the electric floor heating panel. Yes.

  The present invention has been made in view of the above circumstances, and in an electric floor heating panel in which a power line and a heater line are incorporated on the back surface of a wooden base material, from a lead wire that connects the power line and the heater line. It is an object to suppress generated electromagnetic waves.

  An electric floor heating panel according to the present invention for solving the above-mentioned problems is an electric floor heating panel in which a power line and a heater line are incorporated on the back surface of a wooden base material. 2 heat generation lines and one detection line, a first melting line is interposed between the first heat generation line and the detection line, and the first heat generation line and the second heat generation line. Is a three-wire heater wire in which at least a second melting fault is interposed between the two and the melting point of the material of the second melting fault is higher than the melting point of the material of the first melting fault. The wire and the three-wire heater wire connect the first heating wire via the first lead wire and the second heating wire via the second lead wire, and The second lead wire is housed in a single groove formed on the back surface of the wooden substrate. There is no particular limitation on the manner of storage, and the first and second lead wires may be stored in a posture that is parallel in the horizontal direction, or may be stored in a posture that is parallel in the vertical direction.

  The electric floor heating panel according to the present invention uses the above-described three-wire heater wire as the heater wire, and the generation of electromagnetic waves from the heater wire is suppressed. Furthermore, the two lead wires connecting the power line arranged on the back surface of the wooden base material and the three-wire heater wire are stored in one groove formed on the back surface of the wooden base material, The two lead wires are configured to run substantially in parallel in a state where they are aligned vertically or horizontally in the concave groove. Since the current flows in the opposite direction in the first lead wire and the second lead wire, the magnetic fields cancel each other in the portion where the two lead wires run substantially in parallel in the groove. As a result, electromagnetic waves generated from the lead wires are greatly suppressed.

  Furthermore, by storing the first and second lead wires in one groove, compared to the case where the two lead wires in the electric floor heating panel occupy each separately, The effective heater zone can be enlarged correspondingly, and the surface temperature unevenness of the electric floor heating panel can be reduced accordingly.

  Further, the three-wire heater wire has a structure in which one end of the first and second heating wires is connected to the power supply side and the other end is connected to each other, and is attached to the back surface of the wooden base material. The work to incorporate the heat generation circuit with the 3-wire heater wire is just to embed the heat generation wire in the groove formed on the back of the wooden base material, and it is not necessary to create a closed loop. Assembling work of the wire is simplified and wiring by NC is also possible.

  In one aspect of the electric floor heating panel according to the present invention, a temperature fuse with a resistor is interposed between the second heating wire and the second lead wire of the three-wire heater wire, The heating line of 2 is connected to the temperature fuse of the temperature fuse with a resistor, and the detection line is connected to a resistor connected to the side opposite to the power supply connection side of the temperature fuse in the temperature fuse with a resistor. And the resistor generates heat when a current flowing through the detection line flows due to a short circuit between the first heating line and the detection line caused by melting of the first molten fault, and the resistance The thermal fuse is blown by heat generated by the vessel.

  In the electric floor heating panel of this aspect, in a normal use state, the resistance value of the heating wire is included in the fuse of the temperature fuse with a resistor connected to the second heating wire side of the three-wire heater wire. Therefore, the normal operation continues without the fuse being blown.

  If a partial breakage due to fatigue breakage, etc. occurs in the heating wire of the 3-wire heater wire built into the electric floor heating panel due to long-term use beyond the product life, etc., set it in the vicinity due to the occurrence of sparks, etc. Excessive heat is generated, and if used continuously, there is a risk of fire. The electric floor heating panel of the said form can avoid reliably that the danger which leads to a fire arises at such a time.

  That is, in the electric floor heating panel described above, a three-wire heater wire composed of the first and second heating lines and one detection wire is used, and the first and second two heating wires are used. When disconnection occurs in any part of the heating wire and abnormal heating exceeding the setting occurs, the first melting fault made of a material having a lower melting point is melted due to the heating. When the first molten fault functioning as the insulating layer is melted, the first heating wire and the detection wire are short-circuited. Due to this short circuit, a high-value short-circuit current flows through the detection line, and the current flows through the resistor of the thermal fuse with a resistor incorporated in the electric floor heating panel, so that the resistor generates heat. And the temperature fuse of the temperature fuse with a resistor connected to the 2nd exothermic line by this heat generation blows. Since the fuse is blown, the power supply from the controller to the electric floor heating panel is completely cut off. Is surely prevented. That is, it is led to the safe side when an accident occurs.

  In addition, in the electric floor heating panel according to the present invention, even if abnormal heat generation occurs due to disconnection in any part of the three-wire heater wire, the detection wire is always short-circuited to the first heating wire side, and therefore flows to the detection wire. Only one fuse that blows due to the current needs to be connected to the second heating wire side, and no diode is required. Also from this point, the effective heater zone becomes large, and the heat generating circuit can be configured at low cost.

  In addition, the whole shape of the electric floor heating panel according to the present invention is arbitrary, and examples thereof include a rectangular shape and a shape in which long unit pieces are assembled in a mushroom shape while shifting the position in the longitudinal direction. The buffer material layer may be attached to the back surface of the wooden base material, and the electric floor heating panel of this form can be effectively used as a directly attached floor heating panel.

  The present invention also discloses an electric floor heating floor characterized in that a plurality of the above-described electric floor heating panels are spread on the floor ground surface in a state of being connected in parallel.

  According to the present invention, an electric floor heating panel and an electric floor heating floor that hardly generate electromagnetic waves when energized can be obtained. In addition, an electric floor heating panel having an effective safety design can be obtained against inconvenience such as combustion caused by disconnection of the heating wire that may occur when the product life is exceeded.

  Hereinafter, the present invention will be described by way of embodiments with reference to the drawings. FIG. 1 is a schematic diagram showing the entire electric floor heating floor, FIG. 2 is a diagram for explaining an example of an electric floor heating panel used therein, and FIG. 3 is a diagram showing a three-wire heater wire incorporated in the electric floor heating panel. FIG. 4 is a diagram for explaining a heat generating circuit in an electric floor heating panel, and FIGS. 5 and 6 are diagrams for explaining two modes when a disconnection occurs in the heat generating circuit.

  The electric floor heating floor F is an electric floor heating panel A in which a heating circuit by a three-wire heater wire 20 is incorporated on the back surface of a wooden base material 30 as shown in FIG. A plurality of sheets are electrically connected in parallel and spread, and commercial electric power from the outside is supplied to each electric floor heating panel A via a controller D. The controller D may be used in a conventionally known electric floor heating floor as described in Patent Document 1, and specifies a heating area, starts and stops energization, and temperature in a steady operation mode. Functions such as level setting are provided. In FIG. 1, B is a peripheral panel disposed around the electric floor heating panel A and does not include a heater wire.

  As shown in the example of the rear view of the state where the buffer material layer is removed in FIG. 2A, the electric floor heating panel A has a wood base material 30. A first power supply line 11 on the side and a second power supply line 12 on the negative side are incorporated. Connectors 13 and 14 are attached to the ends of the respective power supply lines 11 and 12, and the plurality of electric floor heating panels A are electrically connected by connecting the connectors 13 and 14 to each other. Further, a one-stroke-shaped wiring groove 32 is formed so as to cover almost the entire back surface of the wooden substrate 30, and the three-wire heater 20 having the configuration shown in FIG. 3 is embedded in the wiring groove 32. .

  As will be described later, one end side of the embedded three-wire heater wire 20 is connected to the first and second leads via a resistor-equipped thermal fuse 50 and first and second lead wires 15 and 16. Connected to power supply lines 11 and 12. As shown in FIG. 2 (c), the first and second lead wires 15 and 16 are vertically overlapped in a single groove 33 formed on the back surface of the wooden substrate 30. Stored. The other end side of the embedded three-wire heater wire 20 is a free end, and a thermostat 54 is attached thereto.

  Although not essential on the back surface of the wooden substrate 30, as shown in FIG. 2 (b), a sound insulation groove 36 is formed, and further, a buffer material layer 37 is provided so that it can be used as a directly attached flooring material. It is pasted. In this example, the buffer material layer 37 has a two-layer structure of a nonwoven fabric layer 38 and a resin foam layer 39.

  The three-wire heater wire 20 will be described. As shown in FIG. 3, the three-wire heater wire 20 is harder to cut than the first heating wire 21, the second heating wire 22, and the heating wires 21, 22, and has a low electrical resistance (for example, (Nickel wire) is a three-wire heater, and each wire is covered with a coating resin 24, 25, 26 made of a non-conductive material that melts due to abnormal heat generation of the heating wire. As shown in FIG. 3 (b), the three lines are brought together to form one line, and the whole is made of a non-conductive material having heat insulation such as heat-resistant PVC as shown in FIG. 3 (a). It is covered with a covering material 27.

  The coating resins 24, 25, and 26 are thermoplastic resins such as nylon resins or polyamide resins. However, resins having different melting temperatures are used for the first coating resin 24 that covers the first heating wire 21 and the second coating resin 25 that covers the second heating wire 22. The melting temperature of the first coating resin 24 is 180 ° C., and the melting temperature of the second coating resin 25 is 220 ° C. That is, the second heating wire 22 is coated with the second coating resin 25 having a melting temperature higher than the melting temperature of the first coating resin 24. In addition, the same resin as the first coating resin 24 having a lower melting temperature than that described above is used for the coating resin 26 covering the detection line 23, and the melting temperature is 180 ° C.

  These coating resins 24, 25, and 26 are present as they are during normal operation and function as insulating materials. However, when the first heating wire 21 or the second heating wire 22 is disconnected or partially disconnected, a spark or the like is generated and an abnormal heating state exceeding the melting temperature is partially generated, it is melted and insulated. Loss of function.

  The three-wire heater wire is not limited to the one shown in FIG. 3, and as described in Patent Document 1, the first heating wire 21, the second heating wire 22, and the detection wire 23 are the first heating wire 21. One of the coating resins 24 and the second coating resin 25 may be used as a boundary layer and may be concentrically wound.

  In the present invention, the heat generation circuit in each electric floor heating panel A has a configuration as shown in FIG. In FIG. 4, 20 indicates the above-described three-wire heater wire, and 50 indicates a temperature fuse with a resistor. As shown in the figure, one end of the first heating wire 21 is directly connected to one power supply line 11 via the first lead wire 15, and one end of the second heating wire 22 is provided with the resistor. It is connected to the other power supply line 12 via the temperature lead 51 of the temperature fuse 50 and further via the second lead wire 16. Further, one end of the detection line 23 is connected to a resistor 53 connected to the opposite side of the temperature fuse 51 of the resistor-equipped thermal fuse 50 from the power supply connection side (the side connected to the second lead wire 16). Yes. The other ends of the first and second heating wires 21 and 22 are connected in series with each other via a thermostat 54. Further, when the resistor 53 generates heat, the resistor-equipped thermal fuse 50 causes the current flowing through the detection line 23 to flow through the resistor 53 connected to the opposite side of the above-described temperature fuse 50 from the power supply connection side. The fuse 51 is designed to be blown by the heat. In this example, the resistance of the resistor 53 is 1500 to 1600Ω, and the fuse 51 is blown at 99 ° C.

  In the heat generation circuit, electric power is supplied from a commercial power source to the power supply lines 11 and 12 via the controller D, and the current flows through the first heat generation line 21 and the second heat generation line 22 of the three-wire heater line 20. By flowing, the three-wire heater wire 20 generates heat. At this time, in the three-wire heater wire 20, current flows in a reciprocating manner through the first and second heating wires 21, 22 that run substantially in parallel, and thus is generated in each heating wire 21, 22. The magnetic fields cancel each other, and generation of electromagnetic waves from the three-wire heater wire 20 during energization is suppressed.

  Furthermore, as shown in FIG. 2 (c), the two lead wires 15 and 16 connecting the power wires 11 and 12 disposed on the back surface of the wood substrate 30 and the three-wire heater wire 20 have a wood substrate. It is stored in a single vertical groove 33 formed on the back surface of the material 30 in a vertically parallel posture, so that the two lead wires 15 and 16 run substantially in parallel. A magnetic field is generated when a current flows through the first lead wire 15 and the second lead wire 16, but the current flows in the first lead wire 15 and the second lead wire 16 in the opposite direction, and two wires are generated. As described above, since the lead wires 15 and 16 run substantially in parallel in the concave groove 33, the generated magnetic fields cancel each other. As a result, the lead wires 15 and 16 are generated from the lead wires 15 and 16, respectively. Electromagnetic waves are also greatly suppressed.

  Therefore, the electromagnetic wave generated from the electric floor heating panel A when energized is almost zero, and the electromagnetic wave countermeasures of the electric floor heating floor F are complete. Further, the two lead wires 15 and 16 are stored in one groove 33, and the areas occupied by the two lead wires 15 and 16 in the electric floor heating panel A are stored separately. Small compared to the case. Accordingly, the effective heater zone can be increased, and the surface temperature unevenness of the electric floor heating panel A can be reduced.

Although not particularly illustrated, the two lead wires 15 and 16 are only required to be stored in a single groove groove 33 formed on the back surface of the wooden base material 30 so as to run substantially in parallel. not limited to, even if stored so as to be parallel to the horizontal direction or an oblique direction, the same effect can be obtained.

  Further, in the above heat generation circuit, in the environment where the electric floor heating floor A is operating normally, as described above, the supplied power is supplied to the first heat generation line 21 and the second heat generation line 22. It flows so as to circulate, and floor heating is performed by the generated heat. Temperature control or the like in normal operation is performed by the controller D described above. During normal operation, no current flows through the detection line 23, and the current flowing through the fuse 51 is a small value that depends on the resistance value of the heating lines 21 and 22, so that the fuse 51 does not blow.

  If the product continues to be used beyond the product life, partial disconnection occurs in either the first heating wire 21 or the second heating wire 22 without the user's knowledge, and the contact resistance increases abnormally. May cause abnormal heating due to sparks. FIG. 5 illustrates a state where such disconnection occurs in the first heating wire 21. When abnormal heating due to spark or the like occurs at any location P of the first heating wire 21, the first coating resin 24 at that location melts, and the coating resin 26 that covers the detection wire 23 adjacent thereto. Also melts.

  When both the coating resins are melted, as shown by a region Q in FIG. 5, the first heating wire 21 and the detection wire 23 are short-circuited, and current flows from the short-circuited portion to the detection wire 23 side. . When the current flows through the detection line 23, the resistor 53 generates heat as described above, and the fuse 51 is blown by the heat. Since the fuse 51 is blown, power supply from the controller D to the heat generating circuit is completely cut off, so that no further heat generation or sparking at the disconnection point P occurs. Thereby, the situation where the shock absorbing material layer 37 which consists of the nonwoven fabric layer 38 and the resin foam layer 39 laminated | stacked on the back surface of the electric floor heating panel A ignites reliably is avoided.

  FIG. 6 illustrates a state where a disconnection occurs in the second heating wire 22. When abnormal heating due to spark or the like occurs in any part of the second heating wire 22, the temperature of the second coating resin 25 at that part rises. Since the melting temperature of the second coating resin 25 is set higher than the melting temperature of the first coating resins 24 and 26 covering the first heating wire 21 and the detection wire 23, Before the resin 25 melts, the first coating resins 24 and 26 covering the first heating wire 21 and the detection wire 23 melt. Thereby, in the same manner as described with reference to FIG. 5, the first heating wire 21 and the detection wire 23 are short-circuited in the region Q. Thereby, a current flows through the detection line 23, the resistor 53 generates heat, and the fuse 51 is blown.

  As described above, the electric floor heating panel A and the electric floor heating floor F according to the present invention are always led to the safe side when an abnormal situation occurs due to disconnection or the like. The safety of the floor heating system is further improved.

  In the electric floor heating panel A, the resistor-equipped thermal fuse 50 can be omitted. In that case, one end of the second heating wire 22 is connected to the power supply line 12 via the straight second lead wire 16. Also in the electric floor heating panel of that form, the effect of being able to suppress the generation of electromagnetic waves is the same as that of the electric floor heating panel A described above. However, in the case of constructing an electric floor heating floor that is always guided to the safe side when an abnormal situation occurs due to disconnection or the like using the electric floor heating panel of this form, for example, the controller D It is necessary to take measures such as incorporating a thermal fuse 50 with a resistor.

  FIG. 7 is a circuit diagram for explaining an example of the electric floor heating floor F in that case, and here, as the controller D, in addition to a conventionally known control unit CU incorporated in a conventionally known heating controller. The resistor-equipped thermal fuse 50 is provided. The resistor-equipped thermal fuse 50 includes a thermal fuse 51 connected to the second heater wire 22 side of the three-wire heater wire 20 embedded in the electric floor heating panel A via a cable wire 3a, and the detection wire. The third cable 52 is connected to the 23 side via the cable 3c, and the third cable 52 is connected to the temperature fuse 51 via the resistor 53 provided in the vicinity of the temperature fuse 51. It is connected to the second heater wire 22 side.

  In the example shown in FIG. 7, the electric floor heating floor F has a heating surface formed by a set of electric floor heating panel groups AG composed of three electric floor heating panels A. In FIG. As shown, more electric floor heating panel groups AG may be connected in parallel.

  In the above-described electric floor heating floor F, in an environment where each electric floor heating panel A is operating normally, the electric power supplied from the controller D is a three-wire type incorporated in all the electric floor heating panels A. The first heater wire 21 and the second heater wire 22 of the cord-like heater 20 flow in a circulating manner, and floor heating is performed by the heat generated. The temperature control or the like in normal operation is performed by the controller CU of the controller D described above. In any one of the electric floor heating panels A, when a situation where a high current flows through the detection line 23, the current causes the resistor 53 in the temperature-provided fuse 50 incorporated in the controller D to be heated, The thermal fuse 51 is blown. Thereby, the supply of electric power to all the electric floor heating panels A is cut off, and the floor heating floor F is guided to the safe side.

Schematic which shows the whole electric floor heating floor. The figure explaining an example of the electric floor heating panel which concerns on this invention. The figure explaining the 3-wire type heater wire integrated in an electric floor heating panel. The figure explaining the heat generating circuit in an electric floor heating panel The figure explaining the 1st aspect when abnormal heat_generation | fever arises in the heat generating circuit. The figure explaining the 2nd aspect when abnormal heat_generation | fever arises in the heat generating circuit. The circuit diagram explaining the other aspect of an electric floor heating floor.

Explanation of symbols

  A ... Electric floor heating panel, B ... Peripheral panel, C ... Floor base, D ... Controller, F ... Electric floor heating floor, 11, 12 ... Power lines attached to the electric floor heating panel, 13, 14 ... Connector 15 ... first lead wire, 16 ... second lead wire, 20 ... 3-wire heater wire, 21 ... first heating wire, 22 ... second heating wire, 23 ... detection wire, 27 ... covering material , 24, 26 ... first coating resin, 25 ... second coating resin, 30 ... wood base material, 33 ... concave groove for storing the lead wire formed on the back surface of the wood base material, 36 ... sound insulation groove, 37 ... buffer material layer, 50 ... thermal fuse with resistor, 51 ... thermal fuse, 53 ... resistor, 54 ... thermostat

Claims (4)

An electric floor heating panel in which a pair of power wires and heater wires are incorporated on the back surface of a wooden substrate,
The heater wire includes first and second heat generation lines and one detection line, and a first molten fault is interposed between the first heat generation line and the detection line. At least the second melting fault is interposed between the heating line and the second heating line, and the melting point of the material of the second melting fault is higher than the melting point of the material of the first melting fault 3 Wire heater wire,
A pair of connectors for electrical connection to adjacent power lines is connected to both ends of the pair of power lines,
In the three-wire heater wire, the first heating wire and the second heating wire are electrically connected at one end side, and the first heating wire is connected to the first lead wire at the other end side. And a second heating wire is connected to each of the power supply wires wired between the pair of connectors via a second lead wire,
And the said 1st and 2nd lead wire is stored in the state where it was parallel and contacted in the 1 groove of the groove formed in the back of a wooden substrate ,
The electric floor heating panel, wherein the three-wire heater wire intersects a pair of power supply lines between the pair of connectors .   The electric floor heating panel according to claim 1, wherein a thermal fuse with a resistor is interposed between the second heating wire and the second lead wire of the three-wire heater wire. . The second heat generation line is connected to a temperature fuse of the temperature fuse with a resistor, and the detection line is a resistor connected to a side opposite to a power supply connection side of the temperature fuse in the temperature fuse with a resistor; And the resistor is heated by a current flowing through the detection line due to a short circuit between the first heating line and the detection line caused by melting of the first molten fault, The electric floor heating panel according to claim 2 , wherein the temperature fuse is blown by heat generated by the resistor.   An electric floor heating floor, wherein a plurality of electric floor heating panels according to any one of claims 1 to 3 are spread on a floor base surface in a state of being connected in parallel.

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