JPS6049590A - Electric carpet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to electric carpets.

Conventional Structure and Problems Electric carpets require a soft sitting comfort and roughness on the skin for those who sit or lie down on them to get warm. A surface material 1 consisting of a cushion material 1a and a cushion material 1b is provided.

In addition, a string-like heating element 4 is placed between the surface material 1 and the heat insulating material 20.
A heater unit l-6 (c-pinched and fixed with a string-like temperature sensor 5 wired therein) is sewn around the periphery with sewing thread 3,
The configuration was such that a temperature controller 7 controlled the temperature of the carpet.

With the above configuration, the cushioning material 1b has excellent heat retaining properties, and in non-practical conditions, heat is trapped inside, making it easier for the controller to control the cushioning material to operate at a constant temperature, resulting in relatively low power consumption. Figure 1 shows the cushioning material 1 under the load of the human body under practical conditions.
b shows the compressed state. In this state, the upward thermal resistance decreases in proportion to the thickness of the surface material 1, and the heat of the string-shaped heating element 4 is easily transmitted to the user, but the area of the loaded part Since the ratio is low, there is little change in the output of the temperature sensor 5, and as a result, the heat generation JI shown in FIG.

Therefore, in order to provide sufficient warmth during actual use, it is necessary to increase the operating temperature during non-practical use, which requires high heat resistance from the materials used, resulting in high product costs, and also wastes when non-practical use. It was uneconomical as it consumed a lot of electricity.

OBJECT OF THE INVENTION It is an object of the invention to provide an electric carpet that eliminates the problems of the conventional art, has low product cost, and is excellent in energy saving performance.

Structure of the Invention The electric carpet of the present invention has a heating surface with a load of 0.5
It is made of an elastic material whose thickness decreases to 20% or less at kg/cm, and a PTC string-shaped heating element (hereinafter referred to as PTC string-shaped heater) whose resistance increases rapidly at a certain temperature is used between the back side and the insulation. ) are arranged in a planar manner.

DESCRIPTION OF EMBODIMENTS As shown in FIG. 2, a PTC string-shaped heater 4 is placed between a surface material 1 made by laminating a knitted fabric or other soft urethane foam 1b and a heat insulating material 2. A heater unit 5 formed by fixing wires in a planar manner is sandwiched and the entire circumference is sewn and fixed with a thread 3, and the terminal of the PTC string heater 4 is connected to the stain source cord 7 by a connector 6. A controller 8 for adjusting the energization rate is provided in the middle of the power cord 7.

Further, as shown in FIG. 3, the PTC string-shaped heater has two electrode wires 4a placed in a PTC composition 4b made of a polymer resin in which carbon, etc. is uniformly dispersed, and the outer surface of the heater is made of tubing made of an insulating material. Become.

The surface material 1 has an apparent specific gravity of the pile (1d of the pile).
The fabric may be a woven fabric or a knitted fabric having a cut pile or loop pile with a weight per area divided by pile length of 0.1 or less.

Still, a film ICt is interposed between the outer cloth 1a and the soft urethane foam 1b having a specific gravity of 0.1 or less, which is deposited with a metal such as aluminum.

Show points.

Due to the above configuration, in non-practical conditions, the upward thermal resistance of the surface control is large and heat is trapped inside, so the PTC string-like heat resistance 2 with the resistance-temperature characteristics shown in Figure 4 easily exceeds the characteristic inflection point. High resistance occurs. power supply power
It has an excellent energy-saving configuration because it suppresses the input from the
I) Since the thickness of the surface material is 20% or less and the upward thermal resistance is proportionally less than 20φ, the upward heat flow is 5 times or more, which lowers the temperature of the PTC string heater. Since the PTC string heater 4 generates heat due to the electrical resistance of the PTC composition 4b between the two electric fiMs 4a, the electrical resistance value of the part where the temperature has dropped decreases independently of other parts, and the current increases and heats up. The amount increases.

That is, as shown in the calorific value characteristic graph of FIG. 5, sufficient heat is generated only in the area where the user sits or lies down, and the other areas exhibit excellent energy saving performance in that the heat generation is kept low.

In addition, the heat retaining properties of the surface material 1 are quite high, and there is no need to set C as high as η1, 14 degrees, so the material used does not require as much heat resistance, so the product cost can be reduced, etc. - Ideal effect as a pet. I'm having a good time.

Furthermore, in the embodiment, the radiant heat emitted from the PTC string heater 4 in a non-practical state is also reflected by the metal evaporated film 1c and does not pass through, so that the total heat flow rate is further reduced and energy saving is improved.

Effects of the Invention In the present invention, only the used parts are subject to commercial negotiations, so the energy saving effect is high.

[Brief explanation of drawings]

Figures 1 a to C are cross-sectional structural diagrams, usage state diagrams, and calorific value characteristic diagrams of the conventional example; Figure 2 is a cross-sectional structural diagram of an embodiment of the present invention; and Figure 3 is a perspective view of the same PTC string heater. , FIG. 4 is a temperature characteristic diagram of the heater, and FIG. 5 is a calorific value characteristic diagram of the electric carpet. 1...Surface material, 2...Insulating material, 3...
...Thread, 4...PTC string heater, 5...
... Heak Uniso 1-16 ... Connector, 7 ...
...'fL,, lrK =r-do, 8...con 1
- Laura 0 Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure □ Time (minute Figure 3 Figure 4 5liu, 3j ('c-di

Claims (2)

[Claims] (1) The surface material on the heating side is made of elastic material whose thickness decreases to 20% or less under a load of 0.5 Yu/c11, and the resistance between it and the insulation material on the back side increases rapidly at a constant temperature. PTC
An electric carpet with string-like heating elements arranged in a planar manner. (2) The surface material is a soft urethane pet with a specific gravity of 0.1 or less.