JP2020197364A - Planar heating device - Google Patents

Abstract

To provide a planar heating device having high waterproof performance and high safety.SOLUTION: A planar heating device includes: a body 200 having a structure of laminating a plurality of planar members on and under a planar heater unit 230; and a controller 300 which is installed in the body 200 and in which a control substrate controlling energization of the heater unit 230. The controller 300 includes a pair of cases 310 each provided with a frame-like peripheral wall 312. The peripheral wall 312 of the cases 310 includes a conductive wire fixation part 313 provided with introduction grooves 313a introducing conductive wires 232 continuing to the peripheral wall 312; and a conductive wire fixation member 350 mounted on the conductive wire fixation part 313 and having fixation grooves 352 superimposed on the introduction grooves 313a of the conductive wire fixation part 313. A space between the conductive wire fixation part 313 and the conductive wire fixation member 350 is closed by a sealing material 150 injected to form a passage 350a allowing leakage of the sealing material injected between the conductive wire fixation part 313 and the conductive wire fixation member 350.SELECTED DRAWING: Figure 9

Description

The present invention relates to a waterproof structure of a planar warming device using an electric heater as a heat generating source.

Conventionally, this type of planar warming device has been assumed to be installed and used on the floor indoors, so the basic design philosophy is to handle a small amount of water falling from above the planar warming device. Generally, it has a waterproof structure at a level that allows it to be used.

For example, as the structure of the controller of the planar warming device, a plurality of operating devices for operating the planar warming device are built in a case having an operating opening on the elevation surface of the controller, and the plurality of operating devices have an operating opening. The operation knob is operated from the outside of the case via an operation knob, and the operation knob is integrally provided with a closing portion for closing the operation opening at any operation position. In the operation positions where the adjacent operation knobs are close to each other, the closing portions of the adjacent operation knobs are arranged so that they partially overlap each other. As a result, it is possible to prevent water from entering the controller unit from the outside through the operation opening regardless of the operation position of the operation knob (see, for example, Patent Document 1).

FIG. 22 shows a bottom view of the upper case portion of the operation portion of the controller of the conventional planar warming device described in Patent Document 1.

As shown in FIG. 22, a slit-shaped operation opening 2 is provided on the elevation surface of the case 1 of the controller, and the switch operation knob 3 and the resistance operation knob 5 are inserted into the case 1. The closing portion 4 is integrally formed inside the switch operation knob 3, and the closing portion 5 is integrally formed inside the resistance operation knob 5. The entire surface of the operation opening 2 is closed by the closing portion 4 of the switch operation knob 3 and the closing portion 5 of the resistance operation knob, so that water does not easily enter from the outside.

Further, in another planar warming device, a connector for connecting to a controller or the like is installed at the end of the main body of the planar warming device. The heating element and the heat sensitive body arranged in the main body are connected inside the connector, and the connector is filled with an adhesive having insulation and water resistance to maintain the insulation and waterproofness (insulation and waterproofness). For example, see Patent Document 2).

FIG. 23 shows a cross-sectional view of a connector of a conventional planar warming device described in Patent Document 2. As shown in FIG. 23, the end portion of the heat sensitive body 7 arranged inside the main body 6 of the planar warming device is connected to the connection board 9 inside the connector 8. The internal space of the connector 8 is filled with the filler 10 so that the insulating property and the waterproof property can be maintained.

Japanese Unexamined Patent Publication No. 2012-193943 Jitsukaisho 61-48686

In the configuration of the planar warming device of Patent Document 1, it is possible to prevent water from entering the inside of the controller when water at a level that does not allow the controller to enter is splashed from the surroundings.

However, when the controller and the entire planar warming device are completely submerged, water infiltrates into the controller and the insulated state cannot be maintained. In addition, measures against electric leakage inside the main body of the planar warming device have not been taken. For example, if the entire planar warming device is washed with water, it is possible that a problem will occur. There was room.

Further, in the configuration of the planar warming device of Patent Document 2, it is presumed that the waterproof function inside the connector is maintained at a high level, but it is difficult to confirm the filling state of the filler, and the waterproofing for each product is performed. There is concern that performance will vary. Further, as in the configuration of Patent Document 1, no measures against electric leakage in the main body of the planar warming device have been taken, and there is room for improvement.

The present invention solves the above-mentioned conventional problems, and provides a highly safe planar warming device capable of exerting a sufficient waterproof effect even when the entire planar warming device is splashed with water. The purpose is to provide.

In order to solve the above-mentioned conventional problems, the planar warming device of the present invention has a main body having a plurality of planar members laminated on the upper and lower sides of the planar heater unit, and the heater unit installed on the main body. The controller includes a controller having a built-in control board for controlling the energization of the case, and the controller includes a pair of cases having a frame-shaped peripheral wall, and the peripheral wall of the case has a conductive wire continuously connected to the peripheral wall. It is provided with a conductive wire fixing portion having an introduction groove to be introduced, and is provided with a conductive wire fixing member having a fixing groove which is attached to the conductive wire fixing portion and overlaps with the introduction groove of the conductive wire fixing portion. The space between the conductive wire fixing member is formed by injecting a sealing material into a closed space, and a passage that allows leakage of the injected sealing material between the conductive wire fixing portion and the conductive wire fixing member is provided. It is a formed configuration.

As a result, the space between the conductive wire fixing portion and the conductive wire fixing member has a waterproof structure that prevents water from entering from the outside, and is inside the space between the conductive wire fixing portion and the conductive wire fixing member. The installed charging member can prevent an abnormality due to electric leakage and a short circuit due to flooding, and can provide a safe planar warming device.

The controller of the planar warming device of the present invention has high waterproof performance, and can improve safety and reliability.

A perspective view showing the appearance of the planar warming device according to the first embodiment of the present invention. Schematic diagram showing the components of the main body of the isobaric warming device Cross-sectional view showing the completed state of the main body of the isometric warming device A perspective view showing the details of the heater wire of the isotropic warming device. A perspective view showing the appearance of the controller of the isotropic warming device. Schematic diagram showing the components of the controller of the isotropic warming device Perspective view of the lower surface of the upper case of the controller of the isotropic warming device Perspective view of the state where the heater wire, power cord, and power switch are installed on the upper case of the controller of the isotropic warming device. Perspective view of the conductive wire fixing member of the isotropic warming tool Enlarged view of the main part of the isotropic warming device with the conductive wire fixing member installed Perspective view of the power cord fixing member of the isotropic warming device Enlarged view of the main part with the power cord fixing member of the isotropic warming device installed Perspective view of a state in which a conductive wire fixing member and a power cord fixing member are installed on the upper case of the controller of the isotropic warming device. Top view of the lower case of the controller of the isotropic warming device (A) is a plan view showing the details of part A shown in FIG. 14, and (b) is a plan view showing a state in which a pressure adjusting sheet is installed in the pressure adjusting part shown in (a). Cross-sectional view of the controller of the isotropic warming device in the assembled state Cross-sectional view of the heater wire attachment part of the isotropic warming tool Cross-sectional view of the power cord attachment part of the isotropic warming device External perspective view of the remote controller of the isotropic warming device Top view of the pressure adjusting tube mounting portion of the upper case according to the second embodiment of the present invention. Schematic diagram showing the configuration of the main body according to the third embodiment of the present invention. Perspective view of the controller operation unit of the conventional planar warming device described in Patent Document 1. Cross-sectional view of the controller of the conventional planar warming device described in Patent Document 2.

The planar warming device of the present invention incorporates a main body having a configuration in which a plurality of planar members are laminated on top and bottom of a planar heater unit, and a control board installed on the main body to control energization of the heater unit. A conductive wire fixing portion including a controller, wherein the controller includes a pair of cases provided with a frame-shaped peripheral wall, and the peripheral wall of the case is provided with an introduction groove for continuously introducing a conductive wire into the peripheral wall. The space between the conductive wire fixing portion and the conductive wire fixing member is provided, and the conductive wire fixing member is provided with a fixing groove that is mounted on the conductive wire fixing portion and has a fixing groove that overlaps with the introduction groove of the conductive wire fixing portion. Is configured such that a closed space is formed by injecting a sealing material, and a passage is formed between the conductive wire fixing portion and the conductive wire fixing member to allow leakage of the injected sealing material.

As a result, the space between the conductive wire fixing portion and the conductive wire fixing member has a waterproof structure that prevents water from entering from the outside, and is inside the space between the conductive wire fixing portion and the conductive wire fixing member. The installed charging member can prevent abnormalities due to electric leakage and short circuit due to flooding, and can provide a safe controller for the planar warming device.

When the space between the conductive wire fixing member and the conductive wire fixing portion is filled with the sealing material, it can be visually observed that the sealing material leaks from the passage. The state in which the sealing material leaks from the passage is a guideline for the state in which the sealing material is filled in the space between the conductive wire fixing member and the conductive wire fixing portion.

With this configuration, the space between the conductive wire fixing portion and the conductive wire fixing member is injected with a sealing material, and the conductive wire is connected to the control board and fixed in a state of being led out to the outside of the controller, and is one of the peripheral walls of the case. Form a part. If the sealing material leaks from the passage when the sealing material is injected, a closed space is formed between the conductive wire fixing portion and the conductive wire fixing member. Although it is difficult to check the filling state of the internal sealing material, it can be used as a guide for filling by leaking the sealing material. By combining the upper and lower cases in this state, a waterproof structure of the charging part including the conductive wire connected to the control board inside the peripheral wall of the case is realized in a state where the conductive wire is derived from the controller.

As a result, it is possible to prevent an abnormality due to electric leakage and a short circuit due to flooding, and it is possible to provide a safe planar warming device.

The passage of the planar warming tool of the present invention may have a groove formed at a position where the conductive wire fixing member of the conductive wire fixing member and the peripheral wall of the case come into contact with each other.

Since the passage is located at the end of the conductive wire fixing member, the sealing material leaks when the space between the conductive wire fixing member and the fixing rib is filled with the sealing material. , It is the optimum position as a guide for the state where the sealing material is full.

The passage of the planar warming device of the present invention may form a groove at a position where the conductive wire fixing member of the peripheral wall of the case and the peripheral wall of the case come into contact with each other.

Since the passage is located at the end of the conductive wire fixing member, the sealing material leaks when the space between the conductive wire fixing member and the fixing rib is filled with the sealing material. , It is the optimum position as a guide for the state where the sealing material is full.

The passage of the planar warming tool of the present invention may be formed by a through hole penetrating the conductive wire fixing member.

The passage can be set at an arbitrary position according to the filling method such as the filling speed of the sealing material, and when the space between the conductive wire fixing member and the fixing rib is filled with the sealing material. In addition, the sealing material leaks out, and it is possible to set the optimum position as a guideline for the state in which the sealing material is filled.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
<1> Configuration of Planar Heat Heater FIG. 1 is a perspective view showing the appearance of the planar warmer according to the first embodiment of the present invention.

As shown in FIG. 1, the planar warming device 100 includes a substantially rectangular main body 200 composed of a plurality of sheet-shaped members, a controller 300 integrally installed at a corner of the main body 200, and a controller 300 wirelessly. It is composed of a remote controller 400 to be operated.

On the side surface of the controller 300, there is a power cord 110 that supplies power to the planar warming device 100, on the front surface is a main power switch 120 that operates "on" and "off" of the power supply, and on the upper surface of the controller 300 A receiving unit 130 and an indicator light 140 for receiving the operation signal of the remote controller 400 are installed.

The planar warming device 100 is installed on the floor of a house, and the main body 200 is heated and used by supplying electric power with a power cord 110 connected to the controller 300 by operating the main power switch 120 and the remote controller 400. It is an ingredient.

<2> Main body configuration FIG. 2 is a schematic view showing the constituent members of the main body of the planar warming device, FIG. 3 is a cross-sectional view showing a completed state of the main body, and FIG. 4 is a detailed view of the heater wire. It is a perspective view which shows the structure.

As shown in FIG. 2, the main body 200 of the planar warming tool mainly includes a front surface material 210, a heater unit 230, a heat insulating sheet 240, and a back surface material 250. A first adhesive sheet 220 is interposed between the front surface material 210 and the heater unit 230, a second adhesive sheet 260 is interposed between the heater unit 230 and the heat insulating sheet 240, and a second adhesive sheet 260 is interposed between the heat insulating sheet 240 and the back surface material 250. It is composed of a laminated body in which three adhesive sheets 270 are interposed.

The laminated body is adhesively processed, and the peripheral portion is compressed and welded to form the main body 200 having a cross-sectional shape as shown in FIG.

The surface material 210 is a member on the uppermost surface of the main body 200 of the planar warming tool, and is a surface that the user directly contacts during use. The surface material 210 has not only mechanical strength but also necessary performances such as design, stain resistance, and tactile sensation. In the present embodiment, the surface material 210 is mainly composed of a foam of vinyl chloride resin (hereinafter referred to as PVC), and a polyester non-woven fabric 212 is adhered to the back surface of the colored and patterned surface sheet 211 with an adhesive 213. The laminated sheet has a thickness of about 2 mm.

The heater unit 230 is a heat generating source of the planar warming tool, and has a heater wire 232, which is a conductive wire, arranged in a meandering shape on one side of an aluminum sheet 231 containing aluminum as a main component.

As shown in FIG. 4, the heater wire 232 spirally winds a detection wire 232b for detecting temperature around the central glass fiber 232a, forms an insulating layer 232c with nylon resin on the outer periphery thereof, and forms an insulating layer 232c. A heating wire 232d is spirally wound around the outer periphery of the above, a PVC insulating layer 232e is formed on the outer periphery thereof, and an adhesive layer 232f made of polyethylene resin is formed on the outer periphery of the insulating layer 232e. In the present embodiment, the outer diameter of the heater wire 232 is about 2.7 mm.

In the heater unit 230, the start end of the heater wire 232 is arranged at one corner of the aluminum sheet 231 and is arranged in a meandering shape so as to cover the entire area of the aluminum sheet 231, and the end is arranged near the start end. .. By applying heat in a state where the heater wire 232 is arranged in a meandering shape on the aluminum sheet 231, the adhesive layer 232f of the heater wire 232 is melted and bonded and fixed to the aluminum sheet 231.

The heat insulating sheet 240 is provided for the purpose of obtaining a function of suppressing unnecessary transfer of heat generated by the heater unit 230 to the floor surface and a cushioning property of the planar warming tool. In the present embodiment, the heat insulating sheet 240 is formed in a felt shape having a thickness of about 15 mm by mixing about 85% of high melting point resin fibers containing polyester resin as a main component and about 15% of low melting point resin fibers. It was done.

The heat insulating sheet 240 having the above configuration has high elasticity mainly due to the high melting point resin fiber, and can maintain the deformed state by being plastically deformed by the low melting point resin fiber in a heating state near the melting temperature. It has the characteristics of deformation.

By utilizing the above-mentioned characteristics of heat deformation, the heater wire 232 of the heater unit 230 can be embedded in the heat insulating sheet 250, and the aluminum sheet 231 of the heater unit 230 can be formed in a flat state.

The back surface material 250 is a member of the main body 200 of the planar warming tool that comes into direct contact with the floor surface, and has not only mechanical strength but also cushioning properties and slip resistance. In the present embodiment, the back surface material 250 is formed in a three-layer structure in which both sides of a cloth sheet made of polyethylene resin are coated with polyethylene resin.

The first adhesive sheet 220, the second adhesive sheet 260, and the third adhesive sheet 270 are all formed of polyethylene resin into a sheet shape, which forms a flexible sheet shape at room temperature and melts at about 85 ° C. Demonstrates the function as an adhesive.

Since most of the first adhesive sheet 220, the second adhesive sheet 260, and the third adhesive sheet 270 penetrate into the non-woven fabric 212 and the heat insulating sheet 240 after the adhesive processing, their thickness is almost the same as shown in FIG. It does not remain.

<3> Controller configuration FIG. 5 is a perspective view showing the appearance of the controller of the planar warming device, FIG. 6 is a schematic view showing the main components of the controller, and FIG. 7 is an upper case of the controller. FIG. 8 is a perspective view showing a state in which a heater wire, a power cord, and a main power switch are installed in an upper case, and FIG. 9 is a perspective view of a conductive wire fixing member. FIG. 10 is an enlarged view of a main part in a state where the conductive wire fixing member is installed, FIG. 11 is a perspective view of the power cord fixing member, and FIG. 12 is a main part in a state where the power cord fixing member is installed. FIG. 13 is an enlarged view of a part, FIG. 13 is a perspective view showing a state in which a conductive wire fixing member and a power cord fixing member are installed in the upper case, and FIG. 14 is a plan view of the lower case of the controller. a) is a plan view showing the details of the A portion shown in FIG. 12, and FIG. 15 (b) is a plan view showing a state in which the pressure adjusting sheet is installed in the pressure adjusting portion shown in FIG. 15 (a). Is a cross-sectional view of the completed state of the controller, FIG. 17 is a cross-sectional view of the heater wire mounting portion in the completed state of the controller, and FIG. 18 is a cross-sectional view of the power cord mounting portion in the completed state of the controller.

As shown in FIG. 5, the outer shape of the controller 300 is formed into a substantially rectangular parallelepiped. A power cord 110, which is a conductive wire for supplying power to the planar warming device 100, is installed on the side surface of the controller 300. A main power switch 120 for operating "on" and "off" of the power is installed on the front surface of the controller 300. On the upper surface of the controller 300, a receiving unit 130 for receiving the operation signal of the remote controller 400 and an indicator lamp 140 are installed.

Two indicator lights 120 are installed: a main power indicator light 142 that displays "ON" and "OFF" of the main power switch 120 installed in the controller 300, and an energy saving light 143 that displays the energy saving setting. To.

As shown in FIG. 6, the main constituent members of the controller 300 include a case 301 composed of an upper case 310 and a lower case 320 molded from a resin material, and a function of controlling energization of the planar warming device 100. The control board 330, the packing 340 that prevents water from entering the inside of the case 301, the conductive wire fixing member 350 that fixes the heater wire 232 introduced from the main body 200, and the power cord fixing member 360 that fixes the power cord 110. Is included.

The case 301 has a structure in which a substantially box-shaped upper case 310 and a substantially flat plate-shaped lower case 320 are joined by screws to form a hollow portion inside.

The upper case 310 has a box shape with an open lower surface, and a substantially vertical outer peripheral wall 311 is integrally molded along the outer circumference. Further, in the upper case 310, a substantially vertical inner peripheral wall 312 is integrally molded inside the outer peripheral wall 311 over substantially the entire circumference.

In the upper case 310, a substantially U-shaped bent bent portion 312b is formed in a part behind the inner peripheral wall 312, and two fixed ribs 313 are substantially parallel to the inner peripheral wall 312 on the outside of the bent portion 312b. And it is molded integrally. The fixed rib 313 is formed at a height lower than that of the inner peripheral wall 312, and the bent portion 312b of the inner peripheral wall 312 and the fixed rib 313 form a substantially box-shaped conductive wire fixing portion 314. A plurality of substantially U-shaped introduction grooves 312a and 313a having open edges are formed on the inner peripheral wall 312 and the fixing rib 313 of the conductive wire fixing portion 314 at intervals in the width direction.

The upper case 310 has a configuration in which a plurality of screw receiving portions 315 are integrally molded between the outer peripheral wall 311 and the inner peripheral wall 312, and the upper case 310 and the lower case 320 can be integrally fixed with screws.

On the front surface of the upper case 310, an outer peripheral wall 311 and an inner peripheral wall 312 are integrally molded, and a power switch mounting portion 316 for installing the main power switch 120 is formed in that portion. The power switch mounting portion 316 is a substantially rectangular through hole.

The main power switch 120 is a waterproof type switch, and by pushing it into the power switch mounting portion 316, the waterproof packing attached to the main power switch 120 is brought into close contact with the power switch mounting portion 316 to ensure a waterproof structure. To.

A rib connecting the outer peripheral wall 311 and the inner peripheral wall 312 is integrally molded on the side surface of the upper case 310, and a power cord attachment portion 317 for installing the power cord 110 is formed. The power cord attachment portion 317 is formed in a shape in which a rubber cord bush 111 insert-molded can be attached to the outer peripheral portion of the power cord 110. The power cord attachment portion 317 constitutes a conductive wire fixing portion.

On the upper surface of the upper case 310, a light receiving window 131 molded of a translucent resin material that transmits infrared rays and two display windows 141 molded of a transparent resin material are closely fixed.

The remote controller 400 transmits an infrared operation signal, and the transmitted infrared operation signal is transmitted through the light receiving window 131 and received by the receiving unit 130 installed on the control board 330.

An LED indicator light 140 is installed on the control board 330, and the indicator light 140 can be visually recognized from the outside of the controller 300 through the display window 141.

As shown in FIG. 14, the lower case 320 has a substantially rectangular flat plate shape, and an outer peripheral wall 321 to be joined to the upper case is integrally molded on the peripheral edge of the lower case 320. The outer peripheral wall 321 is formed in substantially the same shape as the outer peripheral wall of the upper case 310.

Inside the outer peripheral wall 321, two parallel ribs 322 are integrally molded so as to circulate, and a packing groove 323 that circulates continuously is formed between the two ribs 322. The packing groove 323 has a shape substantially similar to the inner peripheral wall 312 formed in the upper case 310, and when the upper case 310 and the lower case 320 are overlapped, the inner peripheral wall 312 of the upper case 310 is located substantially in the center of the packing groove 323. It is formed to do.

As shown in FIG. 15A, a pressure adjusting portion 324 is integrally formed inside the rib 322. The pressure adjusting portion 324 has a plurality of ventilation holes 324b formed in the central portion of the circular protrusion 324a.

As shown in FIG. 15B, a pressure adjusting sheet 325 is adhesively fixed to the protrusion 324a, and the pressure adjusting sheet 325 is formed of a waterproof / breathable material that allows air to pass through but does not allow water to pass through. .. The controller 300 is configured to include pressure adjusting means capable of ventilating the inside and the outside through the ventilation holes 324b and the pressure adjusting sheet 325.

A plurality of screw holes 324 are integrally molded between the outer peripheral wall 311 and the packing groove 323. The installation position of the screw hole 324 is arranged at a position corresponding to the screw receiving portion 315 of the upper case 310, and the upper case 310 and the lower case 320 can be integrally fixed with screws.

As shown in FIG. 6, the packing 340 is molded into a frame shape having a substantially rectangular cross section using silicon rubber as a material. The packing 340 is formed in a frame shape and dimensions that can be pushed into the packing groove 323 of the lower case.

The control board 330 is composed of a plurality of members including a microcomputer, and has surface warming such as power on / off, temperature detection and temperature control functions of the main body 200, and communication functions with the remote controller 400. It has all the control functions of the tool 100.

As shown in FIG. 9, the conductive wire fixing member 350 is molded from a resin material and has a substantially U-shaped cross section. In the conductive wire fixing member 350, ribs 351 are integrally formed on the outer surface of the bottom surface over the entire length. In the conductive wire fixing member 350, a plurality of substantially U-shaped fixing grooves 352 are formed on both long sides with the edges on the bottom side open. The fixing groove 352 has the same arrangement and the same dimensions as the introduction groove 313a formed in the fixing wall 313 of the upper case 310.

The conductive wire fixing member 350 has a shape that can be installed so as to straddle the two fixing ribs 313 of the conductive wire fixing portion 314 of the upper case 310. The conductive wire fixing member 350 is provided with a pair of sealing material injection ports 353 on the bottom surface. The sealing material injection port 353 is provided so as to inject the sealing material 150 into the space surrounded by the conductive wire fixing member 350 and the fixing rib 313.

The conductive wire fixing member 350 has grooves formed at both ends of the bottom surface, and the grooves form a passage 350a that communicates the space surrounded by the conductive wire fixing member 350 and the fixing ribs 313 with the outside.

In the passage 350a, when the sealing material 150 is injected from the sealing material injection port 353 into the space surrounded by the conductive wire fixing member 350 and the fixing rib 313, the space surrounded by the conductive wire fixing member 350 and the fixing rib 313 is sealed. When the material is full, the sealing material 150 is configured to flow out through the passage 350a.

FIG. 13 shows a state in which the conductive wire fixing member 350 is installed with the heater wire 232 and other conductive wires extending from the main body 200 to the controller 300 arranged on the conductive wire fixing portion 314 of the upper case 310. is there. FIG. 10 shows an enlarged plan view of a main part in a state where the conductive wire fixing member 350 is installed on the conductive wire fixing portion 314.

The conductive wire fixing member 350 is installed so as to straddle the fixing rib 313. With the conductive wire fixing member 350 installed on the fixing ribs 313, the ribs 351 of the conductive wire fixing member 350 are arranged continuously with the adjacent inner peripheral wall 312 and have the same height. Further, the upper end portion of the conductive wire fixing member 350 comes into contact with the inner surface of the upper case 310.

In the state where the conductive wire fixing member 350 is installed on the fixing rib 313, the introduction groove 313a of the upper case 310 and the fixing groove 352 of the conductive wire fixing member 350 overlap each other, and the lower end portion of the introduction groove 313a and the upper end portion of the fixing groove 352 overlap. An insertion hole through which the heater wire 232 and other conductive wires extending from the main body 200 to the controller 300 pass is formed between the two.

As shown in FIG. 10, both ends of the conductive wire fixing member 350 are in contact with the bent portion 312b of the inner peripheral wall 312 in a state of being installed on the fixing rib 313. Passages 350a are formed at both ends of the conductive wire fixing member 350, and the passages 350a communicate the space surrounded by the conductive wire fixing member 350 and the fixing ribs 313 with the outside.

The conductive wire fixing member 350 is installed in the conductive wire fixing portion 314, and by injecting the sealing material 150 from the sealing material injection port 353a, as shown in FIG. 17, the conductive wire fixing member 350 and the fixing rib 313 The enclosed space is filled with the sealing material 150 to form a sealed state. The sealing material 150 is preferably a material that cures by reacting with moisture in the air, and in the present embodiment, a material containing a silane-terminal polymer as a main component is used.

The sealing material 150 is injected into the space surrounded by the conductive wire fixing member 350 and the fixing rib 313 from the sealing material injection port 353a.

The sealing material injection port 353a is provided between the heater wire 232 and the heater wire 232, avoiding a position facing the heater wire 232. Therefore, the sealing material 150 is sufficiently filled from the inner bottom portion facing the sealing material injection port 353a in the space surrounded by the fixing rib 313 and the conductive wire fixing member 350, and then wraps around inside to sufficiently connect the heater wire 232. It fills the perimeter and fills the entire space. Efficient seal injection will be possible based on the fluidity and filling speed of the seal material.

When the sealing material 150 fills the space between the conductive wire fixing member 350 and the fixing rib 313, the sealing material 150 is formed between the insertion hole formed between the introduction groove 313a and the fixing groove 352 and the heater wire 232. It leaks from the formed gap. Further, it leaks from the passage 350a, and it can be visually observed that the leaked sealing material 150 protrudes in a square shape.

The state in which the sealing material 150 protrudes from the passage 350a in a square shape is a guideline for the state in which the sealing material 150 is filled in the space between the conductive wire fixing member 350 and the fixing rib 313. Since the passage 350a is formed at both ends of the conductive wire fixing member 350, the sealing material 150 is formed when the space between the conductive wire fixing member 350 and the fixing rib 313 is filled with the sealing material 150. Will leak out, and it will be the optimum position as a guideline for the state in which the sealing material 150 is filled.

Since the upper end of the conductive wire fixing member 350 is in contact with the inner surface of the upper case 310 and the sealing material 150 is filled with the conductive wire fixing member 350 pressed against the upper case 310, the upper end of the conductive wire fixing member 350 is filled. Almost no leakage of the sealing material 150 occurs between the portion and the inner surface of the upper case 310.

When injecting from one of the two injection ports, some leak out from around the heater wire, but the sealing material 150 also leaks from the passage 350a near the sealing material injection port 353a, so stop the injection there. Next, the sealing material 150 is injected from one of the sealing material injection ports 353a until it leaks from the one passage 350a.

It is preferable that the color of the resin material constituting the conductive wire fixing member 350 is different from the color of the sealing material 150 so that the sealing material 150 can be easily seen to leak.

When the leaked unnecessary sealing material 150 is wiped off, the passage 350a is in a state of being filled with the sealing material 150.

In the present embodiment, a passage 350a is formed between the conductive wire fixing member 350 and the bent portion 312b of the inner peripheral wall 312, and the sealing material 150 is injected into the space surrounded by the conductive wire fixing member 350 and the fixing rib 313. If the sealing material 150 leaks from the passage 350a during the work, it can be used as a guide that the space is filled with the sealing material 150.

In the present embodiment, the passage 350a is formed by forming grooves at both ends of the conductive wire fixing member 350, but the passage may be formed by forming a groove at the bent portion 312b of the inner peripheral wall 312.

As a result, since the passage 350a is located at both ends of the conductive wire fixing member 350, when the space between the conductive wire fixing member 350 and the fixing rib 313 is filled with the sealing material 150, the sealing material 150 is filled. The 150 will leak, and the optimum position will be used as a guideline for the state in which the sealing material 150 is filled.

Further, a through hole may be formed on the bottom surface or the long side of the conductive wire fixing member 350 so as to pass through the conductive wire fixing member 350, and the through hole may be used as a passage.

The passage can be set at an arbitrary position according to the filling method such as the filling speed of the sealing material, and when the space between the conductive wire fixing member and the fixing rib is filled with the sealing material. In addition, the sealing material leaks out, and it is possible to set the optimum position as a guideline for the state in which the sealing material 150 is filled.

As shown in FIG. 11, the power cord fixing member 360 is molded from a resin material and has a substantially U-shaped cross section, and a sealing material injection port 362 for injecting the sealing material 150 is installed on the bottom surface 361. To. The power cord fixing member 360 is formed with a protrusion 360a so as to sandwich the outer peripheral wall 311 while being installed on the power cord attachment portion 317. The power cord fixing member 360 constitutes a conductive wire fixing member.

The protrusion 360a is provided with a passage 360b by forming a groove on the surface that comes into contact with the outer peripheral wall 311 when installed in the upper case 310. The passage 360b communicates the space surrounded by the power cord mounting portion 317, the power cord fixing member 360, and the cord bush 111 with the outside in a state where the power cord fixing member 360 is fitted in the power cord mounting portion 317.

As shown in FIG. 8, when the power cord 110 is installed in the power cord attachment portion 317, the cord bush 111 of the power cord 110 is installed in the power cord attachment portion 317. The power cord 110 is introduced on the plug side to the outside of the outer peripheral wall 311 and the other to the inside of the inner peripheral wall 312.

As shown in FIG. 13, the power cord fixing member 360 is installed so as to straddle the power cord mounting portion 317, and the bottom surface 361 of the power cord fixing member 360 is continuously arranged with the inner peripheral wall 312 and has the same height. Become. FIG. 12 shows an enlarged view of a main part of the power cord fixing member 360 in an installed state.

When the sealing material 150 is injected from the sealing material injection port 362 with the power cord fixing member 360 installed, a space surrounded by the power cord mounting portion 317, the power cord fixing member 360, and the cord bush 111, as shown in FIG. Is filled with the sealing material 150 to form a sealed state.

The seal material injection port 362 is provided so as to be offset from the position of the cord bush 111, and when the seal material 150 is injected, in the space between the power cord attachment portion 317, the power cord fixing member 360, and the cord bush 111. , The sealing material 150 is filled from the inner bottom. When the sealing material 150 fills the space between the power cord mounting portion 317, the power cord fixing member 360, and the cord bush 111, the sealing material 150 leaks from the passage 360b formed between the protruding portion 360a and the outer peripheral wall 311. , It can be visually observed that it protrudes in a square shape.

The state in which the sealing material 150 protrudes in a square shape is a guideline for the state in which the sealing material 150 is filled in the space between the power cord mounting portion 317, the power cord fixing member 360, and the cord bush 111.

As a basic procedure for assembling the controller 300 having the above configuration, as a preparatory work for the upper case 310, a control board 330, a power cord 110, a main power switch 120, a conductive wire fixing member 350, and a power cord fixing member 360 are placed in the upper case 310. The sealing material 150 is filled with all the members such as the above installed.

On the other hand, as a preparatory work for the lower case 320, the pressure adjusting sheet 325 is adhesively fixed to the protruding portion 324a of the pressure adjusting portion 324, and the packing 340 is pushed into the packing groove 323.

The upper case 310 filled with the sealing material 150 and the lower case 320 in which the packing 340 is pushed into the packing groove 323 are overlapped with each other, and a plurality of screws are screwed through the screw holes 324 of the lower case 320 to receive the screw receiving portion 315 of the upper case 310. To be screwed into.

As shown in FIG. 16, in the controller 300 screwed with a plurality of screws, the inner peripheral wall 312 of the upper case 310 and the packing groove 323 of the lower case 320 are closely fixed via the packing 340. The space formed by the inner peripheral wall 312 of the upper case 310 and the packing groove 323 of the lower case 320 forms a waterproof space 302 that is not flooded from the outside.

The opening of the passage 350a through which the sealing material 150 leaks is provided at the contact portion facing the packing 340 when the upper and lower cases are combined. As a result, the upper case 310 and the lower case 320 can be fixed via the packing 340 in a state where the passage 530a is filled with the sealing material 150, so that the waterproof space 302 can be reliably waterproofed.

Since the inner peripheral wall 312 of the upper case 310 presses the central portion of the packing 340 inserted into the packing groove 323 of the lower case 320, the sealing property can be improved.

The conductive wire fixing member 350 and the power cord fixing member 360 are arranged so that the ribs 351 of the conductive wire fixing member 350 are continuous with the adjacent inner peripheral wall 312 in a state of being mounted on the lower case 320, and have the same height. The bottom surface 361 of the power cord fixing member 360 is arranged continuously with the inner peripheral wall 312 and has the same height.

As a result, the conductive wire fixing member 350 and the power cord fixing member 360 are also sealed by the packing 340 to form a waterproof and sealed structure.

The waterproof space 302 of the controller 300 formed as described above has a configuration in which air can flow through the pressure adjusting sheet 325, but water can be prevented from entering. As a result, the pressure control and humidity control of the waterproof space 302 are automatically performed via the pressure control sheet 325.

<4> Configuration of the remote controller FIG. 19 is a perspective view showing the appearance of the remote controller.

As shown in FIG. 19, in the remote controller 400, an infrared transmitter 420 is installed on the front surface of a substantially rectangular parallelepiped remote controller case 410 molded of a resin material, and an operation signal is installed on the main body 200 from the infrared transmitter 420. It is transmitted to the controller 300.

A plurality of operation switches 430 are installed on the upper surface of the remote controller case 410. The operation switch 430 includes an energizing switch 431 that "turns on" and "turns off" the power of the planar warming device 100, a temperature control switch 432 that sets the temperature of the planar warming device 100, and heating of the planar warming device 100. Area changeover switch 433 that switches the range, energy saving switch 434 that automatically changes the set temperature according to changes in room temperature, and a planar warming device for the purpose of reducing breaker drop when used at the same time as other electric appliances. A power 1/2 switch 435 that alternately energizes 1/2 of the area of the above is installed.

A liquid crystal display unit 436 is set on the upper surface of the remote controller case 410, and the state operated by the operation switch 430 is displayed on the liquid crystal screen of the display unit 436.

The remote controller 410 is configured to be operated by a built-in dry battery. The operation data by the operation of the operation switch 430 is transmitted from the transmission unit 420 as an infrared signal, received by the reception unit 130 of the controller 300, and the heater unit 230 of the main body 200 is controlled.

<5> Operation and operation of the planar warming device The basic usage of the planar warming device 100 is to turn on the main power switch 120 of the controller 300 with the power cord 110 connected to the outlet. , The main power indicator 142 of the controller 300 lights up.

By turning on the energization switch 431 of the remote controller 400, energization of the heater unit 230 is started, and the temperature rise of the main body 200 is started.

The temperature of the main body 200 is maintained at the temperature set by the remote controller 400. When changing the temperature of the main body 200, the set temperature can be changed by operating the temperature control switch 432 of the remote controller 400.

When the use of the planar warming device 100 is terminated, the energization of the heater unit 230 is stopped by turning off the main power switch 120 of the controller 300 of the main body 200.

The above is a method of use in a normal state, but the following describes the performance of the planar warming device 100 in a misused or abnormal environment, especially the most important water resistance. For example, it is assumed that the entire planar warming device 100 is left in water at a depth of about 1 m for 30 minutes or more.

In the controller 300 of the planar warming device 100 of the present embodiment, the inner peripheral wall 312 of the upper case 310 and the packing groove 323 of the lower case 320 are brought into close contact with each other via the packing 340, and thus the inside of the inner peripheral wall 312. A waterproof space 302 is formed in which water does not enter from the outside.

The control board 330, which is a charging member, is installed in the waterproof space 302. The introduction portion of the power cord 110, the heater wire 232, and other conductive wires connected to the control board 330 is sealed with the sealing material 150.

A pressure adjusting sheet 325 is installed on the bottom surface of the lower case 320 corresponding to the waterproof space 302 so that air can pass through the pressure adjusting sheet 325 but water cannot pass through. That is, the waterproof space 302 is a closed space for water, but an open space for air.

By providing the above configuration, even when the controller 300 is completely submerged in water, the waterproof space 302 is not flooded and has high waterproof performance.

When the internal temperature and atmospheric pressure change due to the temperature change, the waterproof space 302 having the above specifications can suppress the internal atmospheric pressure fluctuation by ventilating through the pressure adjusting sheet 325. As a result, the occurrence of dew condensation can be suppressed, and the occurrence of electric leakage and short circuit of the circuit due to dew condensation can be suppressed.

The pressure adjusting sheet 325 has a configuration in which it is connected to the outer surface of the controller 300 via a ventilation hole 324b of the pressure adjusting portion 324 of the lower case 320 and is opened. After the assembly of the controller 300 is completed, air is sent in through the ventilation holes 324b, and by inspecting the leak of the sent air, the airtight state of the waterproof space 302 can be confirmed, and the safety and reliability of the product are ensured. can do.

(Embodiment 2)
FIG. 20 is a plan view of the pressure adjusting tube mounting portion of the upper case of the controller according to the second embodiment.

The present embodiment differs from the first embodiment in the configuration of the pressure regulating unit constituting the pressure regulating means in the waterproof space of the controller. In the following description, the same configurations as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 20, a power cord mounting portion 612 is arranged on the side surface of the upper case 610, and a pressure adjusting tube 620 is installed on the outer peripheral wall 611 near the power cord mounting portion 612 in a substantially U shape. A tube mounting groove 613 is formed. Further, the power cord attachment portion 612 is connected to the inner peripheral wall 615 by a rib 612a, and a substantially U-shaped tube introduction groove 614 is formed in the rib 612a. The power cord mounting portion 612 constitutes a conductive wire fixing portion.

The pressure adjusting tube 620 is installed in the tube mounting groove 613 and the tube introduction groove 614. The pressure adjusting tube 620 is made of a soft tube containing silicon rubber as a main component, and in the present embodiment, the pressure adjusting tube 620 is formed to have an outer shape of 1 mm, an inner diameter of 0.5 mm, and a length of about 50 mm. As a result of the experiment, by adopting this dimension, the pressure adjusting tube 620 has a specification that allows air to pass through but not water.

The pressure adjusting tube 620 has its starting end arranged outside the tube mounting groove 613, bent between the outer peripheral wall 611 and the inner peripheral wall 615, and introduced from the tube introduction groove 614 into the power cord mounting portion 612. Then, it is bent inside the power cord attachment portion 612 and introduced into the inner peripheral wall 615, and the end of the pressure adjusting tube 620 is released into the inner peripheral wall 615. As described above, the pressure adjusting tube 620 is provided with a plurality of bends and height differences. As a result, it becomes difficult for water to enter the inside.

After installing the pressure adjusting tube 620, the power cord 110 is installed in the power cord attachment portion 612 as in the first embodiment.

The lower case has a sealed structure in which the protrusions 324a and the ventilation holes 324b constituting the pressure adjusting portion 324 described in the first embodiment are not formed.

After the assembly of the controller is completed, the pressure adjusting tube 620 having the above configuration sends air from the starting end exposed to the outside of the outer peripheral wall 611, and inspects the leak of the sent air. As a result, the airtight state of the waterproof space can be confirmed, and the safety and reliability of the product can be ensured.

After the inspection of the pressure adjusting tube 620 is completed, it is assumed that the starting end arranged outside the tube mounting groove 613 is pushed inside the outer peripheral wall 611 for some reason. Even in that case, the controller can ensure the safety and reliability of the product because the space surrounded by the inner peripheral wall 615 is formed as a waterproof space.

The pressure regulating tube is a relatively low-priced member, and can reduce the cost of the controller and the planar warming device.

(Embodiment 3)
FIG. 21 is a schematic view showing the configuration of the main body in the third embodiment.

The present embodiment differs from the first embodiment and the second embodiment in that the configuration of the members of the main body and the controller have an electric leakage detection function. In the following description, the same configurations as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 21, the main body 500 mainly includes a front surface material 210, a heater unit 230, a heat equalizing sheet 510, a heat insulating sheet 240, and a back surface material 250. In the main body 500, the first adhesive sheet 220 is interposed between the surface material 250 and the heater unit 230, the second adhesive sheet 260 is interposed between the heat soaking sheet 510 and the heat insulating sheet 240, and the heat insulating sheet 240 and the back surface material are formed. It is composed of a laminated body in which a third adhesive sheet 270 is interposed between the two.

The heat equalizing sheet 510 is a member for the purpose of uniformly diffusing the heat generated by the heater unit 230 over the entire surface of the main body 200 and detecting electric leakage from the heater wire 232 which is a conductive wire. In the present embodiment, the heat equalizing sheet 510 is based on an aluminum sheet having a thickness of about 0.01 mm mainly composed of aluminum, which is a metal sheet having high thermal conductivity, and polyethylene resin and EVA (ethylene) on both sides. -It is formed by coating an adhesive resin 512 made of (vinyl acetate copolymer resin), and melts when the adhesive resin is heated to about 85 ° C. or higher to exhibit a function as an adhesive.

A lead wire 511, which is a conductive wire, is connected to the end of the heat equalizing sheet 510, and the lead wire 511 is introduced inside the controller in the same manner as the heater wire 232, and is connected to the leakage detection circuit of the control board. To. The electric leakage detection circuit includes an electric power cutoff circuit that detects electric leakage and cuts off the electric power of the heater wire 232.

A lead wire 233, which is a conductive wire, is connected to the end of the aluminum sheet 231 of the heater unit 230, and is connected to an electric leakage detection circuit of a control board.

The lead wire 233 is pulled into the controller via the conductive wire fixing member 350 and the fixing rib 313, similarly to the heater wire described in the first embodiment. As a result, the waterproof performance is maintained, and the safety and reliability of the product can be ensured.

When the heater wire 232 leaks inside the main body 500, the leakage detection circuit detects the current flowing through the soaking sheet 510 or the aluminum sheet 231 of the heater unit 230, so that the energization cutoff circuit operates and the heater wire 232 The energization is cut off. As a result, the user can be prevented from being damaged by electric shock or the like, and the surface warming device can be prevented from being ignited, so that the safety can be further improved.

In the planar warming device of the present embodiment, the pressure regulating means 325 is made of a waterproof and breathable material that allows ventilation but does not allow water to pass through.

As a result, the pressure adjusting means 325 can be implemented with a simple configuration, and a simple and reliable pressure adjusting means can be implemented.

The planar warming device of the present embodiment includes a pressure adjusting tube 620 that conducts the outside of the controller 300 and the waterproof space 302, and the pressure adjusting tube 620 is formed in a size that allows ventilation but does not allow water to pass through. doing.

As a result, the pressure adjusting means can be implemented with a relatively low-priced member, and a low-cost and highly safe planar warming device can be provided.

In the planar warming device of the present embodiment, the main body 200 includes a heat equalizing sheet 510 over substantially the entire surface, a lead wire 511 is provided at one end of the heat equalizing sheet 510, and the control board is provided with an electric leakage detection circuit. The lead wire 511 has a function of detecting and shutting off the leakage of the heater wire 232 by connecting to the leakage detection circuit of the control board 330.

As a result, it is possible to cut off the energization of the heater wire based on the information of the electric leakage detection circuit, and it is possible to suppress damage such as electric shock to the user and ignition of the planar warming device, which improves safety. Can be improved further.

The planar warming device of the present embodiment includes a main body 200 including a heater unit 230 and a controller 300, and the peripheral wall 312 of the upper case 310 of the controller 300 is closely fixed to the lower case 320 via the packing 340. A waterproof space 302 having waterproof performance is formed inside the peripheral wall 312, a control board 330 to which the heater wire 232 is connected is arranged in the waterproof space 302, and ventilation into the waterproof space 302 is possible, but water is flooded. The waterproof space has a waterproof structure by providing a pressure adjusting means 325 that shuts off the water, and the control board, which is a charging member installed inside the waterproof space, prevents abnormalities due to electric leakage and short circuit due to flooding. can do. In addition, the pressure adjusting means can suppress atmospheric pressure fluctuations and temperature changes inside the waterproof space to suppress the occurrence of dew condensation, and it is possible to suppress the occurrence of electric leakage in the charging part and short circuit of the circuit due to dew condensation, which is safe. A planar warming device can be provided.

As described above, since the planar warming device according to the present invention can ensure high waterproof performance, it can be applied to applications of electric devices other than the planar warming device that require waterproof performance.

100 Planar warmer 200 Main body 230 Heater unit 232 Heater wire 300 Controller 302 Waterproof space 310 Upper case 312 Inner peripheral wall (peripheral wall)
313a Introductory groove 314 Conductive wire fixing part 317 Power cord mounting part (Conducting wire fixing part)
320 Lower case 325 Pressure control sheet (pressure control means)
330 Control board 340 Packing 350 Conductive wire fixing member 350a Passage 352 Fixing groove 360 Power cord fixing member (Conducting wire fixing member)
360b Passage 500 Main body 510 Heat soaking sheet 511 Lead wire 610 Upper case 615 Inner peripheral wall (peripheral wall)

Claims (4)

A main body composed of a plurality of planar members laminated on the top and bottom of a planar heater unit, and
A controller installed in the main body and incorporating a control board for controlling energization of the heater unit is included.
The controller comprises a pair of cases with a frame-shaped peripheral wall.
The peripheral wall of the case is provided with a conductive wire fixing portion having an introduction groove for continuously introducing the conductive wire into the peripheral wall.
A conductive wire fixing member mounted on the conductive wire fixing portion and having a fixing groove overlapping the introduction groove of the conductive wire fixing portion is provided.
A closed space is formed by injecting a sealing material into the space between the conductive wire fixing portion and the conductive wire fixing member, and the sealing material injected between the conductive wire fixing portion and the conductive wire fixing member. A planar warming device that forms a leak-tolerant passage. The planar warming device according to claim 1, wherein the passage is formed by forming a groove at a position where the conductive wire fixing member of the conductive wire fixing member and the peripheral wall of the case come into contact with each other. The planar warming device according to claim 1, wherein the passage is formed by forming a groove at a position where the conductive wire fixing member of the peripheral wall of the case and the peripheral wall of the case come into contact with each other. The planar warming device according to claim 1, wherein the passage is formed by a through hole penetrating the conductive wire fixing member.

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