JP2588593Y2 - Planar heating element - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar heating element which is preferably used as an anti-freezing heater for preventing freezing of stored water in a flush toilet used in a cold region, for example.

[0002]

2. Description of the Related Art As is well known, flush toilets are
During use in a cold region or during use in winter, there is a possibility that the accumulated water remaining inside the toilet may freeze to make it impossible to wash, or the toilet may be damaged. Therefore, conventionally, on a planar body such as an aluminum foil sheet having an adhesive layer on one or both sides,
A cord-shaped heater as a heating element and a heater such as a sheet-shaped heating element, which is provided with a thermostat as a temperature control component and is appropriately insulated, are used to warm and heat the lower part of the toilet, thereby storing water. It was trying to prevent freezing.
Specific examples of this type of anti-freezing heater include those disclosed in Japanese Utility Model Publication No. 2-13586 or Japanese Utility Model Application Laid-Open No. 3-62172.

First, Japanese Utility Model Publication No. 2-13586 discloses that
An antifreeze heater of the type that indirectly heats a toilet bowl is shown. Specifically, a heat insulating layer made of a synthetic resin such as foamed polyurethane is provided on the inner peripheral surface and lower surface of the space formed below the trap portion (reservoir portion) of the toilet, and on the heat insulating layer disposed on the lower surface. This is a configuration in which a planar heating element is provided. According to this configuration, even if the trap portion has a complicated curved surface shape, the air in the space portion is heated and convected by the heat generated by the planar heating element disposed on the heat insulating layer. It is said that the entire surface can be uniformly heated.

On the other hand, Japanese Utility Model Laid-Open No. 3-62172 discloses that
An anti-freezing heater of the type that directly heats the toilet trap is shown. In other words, the heater for heating the trap portion of the toilet bowl has a configuration in which a planar heating element having flexibility and formed in an expanded shape of the trap portion of the toilet bowl is used. According to this, the planar heating element can be stuck to the back surface of the trap portion having a complicated curved shape in a close contact state, so that freezing of the stored water can be prevented with excellent heating efficiency.

[0005]

However, according to the above-mentioned conventional configuration, there are the following problems. First, the freezing prevention heater disclosed in the above-mentioned publication has a drawback that the heating efficiency is poor because the heating element is installed at a position away from the trap portion of the toilet. Of course, in order to increase the heating efficiency, it is conceivable to increase the amount of heat generated by the heating element, but this would unnecessarily increase the cost. In addition, the thermostat (automatic temperature controller) used as a temperature control component connected to the cord-shaped heater has poor responsiveness and slow operation, and cannot accurately detect the temperature of the trap part of the toilet, so it is accurate. There was also a disadvantage that it was not possible to control the temperature appropriately. for that reason,
Problems such as not being energized while actually frozen, or being energized even though it was not frozen, occurred, preventing good freezing prevention, and wasteful power was extremely large and uneconomical. Met.

[0006] Further, in the anti-freezing heater disclosed in the later publication, although the toilet can be directly heated as described above, there is an advantage that the heating efficiency is excellent,
During long-term use, there is a danger that a part of the heater sheet will be peeled off from the toilet, resulting in abnormal heat generation. In other words, this heater sheet is provided with an adhesive layer such as a double-sided adhesive tape on the surface of the heater sheet to improve the adhesion to the toilet, but is adhered in a state of being in close contact with a trap portion having a complicated curved surface. This is inherently difficult, and the adhesive layer is degraded by heating due to the heat generated by the cord-shaped heater while being used for a long period of time, so that the adhesive strength is reduced and the adhesive layer is peeled off from the toilet. Furthermore, since this anti-freezing heater is designed in accordance with the shape and size of the trap portion of the toilet, the design must be changed for each type of toilet, and it is uneconomical due to lack of mass productivity.

[0007] The present invention has been made based on such a point, and an object thereof is to heat an object to be heated such as a toilet bowl with excellent heating efficiency, and to save power by accurate temperature control. Another object of the present invention is to provide an inexpensive planar heating element that can improve safety.

[0008]

In order to achieve the above object, a planar heating element according to the present invention is disposed in direct contact with a heating section disposed close to an object to be heated and the heating section. And a temperature control unit, wherein the heat generation unit includes an elastic substrate and a cord-shaped heater disposed on the substrate, and the temperature control unit controls a part of the substrate. It is characterized by comprising a holding portion formed by cutting and raising and a temperature control component fixed on the holding portion.

The substrate used in the present invention is 60 to
A substrate having heat resistance of about 70 ° C. or higher and excellent elasticity is preferable. For example, stainless steel plate, hard aluminum plate, metal plate such as copper plate, polycarbonate, nylon,
Hard plastics such as polyethylene terephthalate are exemplified.

A portion of the substrate is cut and raised to form a holding portion for holding and fixing a temperature control component described later. The size of the holding portion is not particularly limited, but is at least such that the temperature control component can be held and fixed.

As the temperature control component, a thermostat having an automatic temperature control function, a thermistor having a temperature detection function, and the like are used. These control parts are fixed on the holding part, and are arranged in contact with the surface of the object to be heated (object to be detected) by the elastic force of the holding part.

[0012]

The planar heating element according to the present invention has a configuration in which the heating portion is arranged close to the object to be heated, and the temperature control section is arranged in a positional relationship so as to directly contact the object to be heated. A temperature control component such as a thermostat that constitutes the temperature control portion is preferably placed in good contact with an object to be heated, such as a trap portion of a flush toilet, by an elastic force of a holding portion to which the component is fixed. Further, a substrate constituting the heat generating portion and a cord-shaped heater arranged in an arbitrary shape on the substrate are arranged close to the object to be heated. As a result, accurate temperature control and excellent heating efficiency can be realized in spite of indirect heating, and power saving and improvement in safety can be achieved. Furthermore, since the shape does not need to be deformed corresponding to the object to be heated, mass productivity is excellent and cost can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the drawings. The planar heating element according to the present invention has a configuration as shown in FIG. First, reference numeral 2 denotes a heat generating portion, and the heat generating portion 2 has a length of 300 mm, a width of 120 mm, and a thickness of 0.2 m.
and a cord-shaped heater 2b arranged in a meandering shape on the upper surface of the substrate 2a. In the present embodiment, a cord-shaped heater having a structure in which a resistance heating wire made of a nickel-chromium alloy wire is spirally wound on a heater core made of glass fiber and a silicone rubber is extrusion-coated around the wire is used. . One end of the cord-shaped heater 2b is connected to a power cord (not shown) via a lead wire 4 connected by a connection terminal 3, and the other end is described later via a lead wire 6 connected by a connection terminal 5. It is connected to a thermostat 7c, which is a temperature control part, and further has a lead wire 8 and a temperature fuse 9 (operating temperature 91) as an over-temperature prevention device.
℃), and connected to a power cord (not shown) via a lead wire 10.

Reference numeral 7 denotes a temperature control unit. The temperature control unit 7 has a holding unit 7a formed by cutting and raising a portion of approximately 40 mm in length and 20 mm in width at a substantially central portion of the substrate 2a.
And a heat-resistant silicone rubber sponge 7b bonded and fixed to the upper surface of the holding portion 7a with a heat-resistant adhesive (not shown).
And a thermostat 7c (operating temperature 2 ° C. ON─5 ° C. OFF) as a temperature control component mounted on the heat-resistant silicone rubber sponge 7b, and a heat-resistant insulating film 7d covering the entirety. I have. The heat-resistant silicone rubber sponge 7b has a heat-insulating function to prevent the heat generated by the cord-shaped heater 2b from being transmitted to the thermostat 7c. It has a function of fixing to the silicone rubber sponge 7b and a function of insulating the connection part.

As shown in FIG. 2, the planar heating element 1 having the above structure is disposed, for example, below a substantially central portion of the bottom surface of the trap portion 11a of the flush toilet 11, and freezes the pool water 11b in the trap portion 11a. It is used as a heater for preventing Here, the planar heating element 1 is made of foamed polyurethane and has a heat insulating function by a support base 12 so that the heating section 2 is located at a position about 20 mm away from the bottom of the trap section 11a, and the temperature control section 7 is connected to the trap section 11a. 11a are arranged in a positional relationship such that they directly contact the bottom surface.

Here, when a rated voltage was applied to the planar heating element (rated at 100 V / 25 W) arranged as described above to generate heat, the water retained in the trap portion frozen at room temperature of -15 ° C. was 4%. After an hour, the ice was thawed and the water temperature was 2 ° C. At room temperature of 0 ° C., the temperature reached 5 ° C. after one hour, the thermostat was turned off, and the heating element was repeatedly turned on and off by a change in water temperature, and the water temperature was maintained at 0 to 3 ° C. When the room temperature was 5 ° C., no electricity was supplied to the heating element, and it was confirmed that the economy was sufficient.

In the present embodiment, a conventional product (actual fairness 2─1
In the same manner as the indirect heating type anti-freezing heater disclosed in Japanese Patent No. 3586, a rated voltage of 100 V @ 30 W was applied to the heater to generate heat in the same manner as described above. As a result, the pooled water in the trap section frozen at room temperature of -15 ° C. was not thawed even after 4 hours, and it took 6.0 hours to completely thaw. At this time, the air temperature near the thermostat was 15 ° C., indicating that the OFF point of the thermostat had to be set to at least 15 ° C.

From the above, it has been proved that the embodiment of the present invention can achieve its purpose with about 17% lower power consumption than the conventional product and about 2/3 of the energizing time, and can greatly reduce the power consumption. .

The freezing prevention heater (plane heating element) according to the present embodiment has a conventional product (actually open flat 3 平 62172) since the heating portion does not contact the trap portion of the toilet bowl which is the object to be heated.
As disclosed in Japanese Unexamined Patent Publication (Kokai) No. H11-260, there is no danger of abnormal heat generation or the like caused by peeling of the heater sheet.

The present invention is not limited to the above embodiment. First, the type, number, combination, and the like of the temperature control components fixed on the holding unit are not particularly limited.
In this embodiment, a thermostat is used as a control component, but a thermistor or a thermal reed switch may be used instead. Further, in addition to a control component such as a thermostat, an overheating prevention device such as a temperature fuse may be fixed on the holding unit. The shape and size of the holding part,
The number, the installation position, and the like are also arbitrary, and may be appropriately determined in consideration of the relationship with the arrangement pattern of the cord-shaped heater. In addition, in the said embodiment, although the example which applied this invention to the freezing prevention heater of a flush toilet is shown, even if it is other than this, the application which detects the surface temperature of a to-be-heated object and performs freezing prevention, For example, similar effects can be obtained by applying the present invention to the prevention of freezing of a water supply / drainage trap.

[0021]

As described in detail above, the planar heating element of the present invention has a structure in which the heating portion is close to the object to be heated and the temperature control section is in direct contact with the object to be heated. Therefore, the object to be heated can be efficiently warmed based on accurate temperature control, and power saving can be realized. Further, since there is no danger of abnormal heating of the cord-shaped heater, the safety is excellent. Further, since it is not necessary to change the design or the like depending on the shape of the object to be heated, the mass production is excellent and the cost can be reduced.

[Brief description of the drawings]

FIGS. 1A and 1B are views showing an embodiment of the present invention, wherein FIG. 1A is a perspective view of a sheet heating element, and FIG. 1B is an enlarged view of a main part of FIG.

FIG. 2 is a view showing an embodiment of the present invention, and is an explanatory view showing a state in which a planar heating element is attached to a trap section of a flush toilet;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Planar heating element 2 Heating part 2a Substrate 2b Cord-shaped heater 3 Connection terminal 4 Lead wire 5 Connection terminal 6 Lead wire 7 Temperature control part 7a Holding part 7b Heat resistant silicone rubber sponge 7c Thermostat (temperature control part) 7d Heat resistant insulation Film 8 Lead wire 9 Thermal fuse (overheating prevention device) 10 Lead wire 11 Rinse toilet 11a Trap part 11b Pool water 12 Support base

Claims (1)

(57) [Scope of request for utility model registration] 1. A planar heating element comprising: a heating section arranged in proximity to an object to be heated; and a temperature control section arranged in direct contact with the object to be heated. A temperature control unit comprising a substrate having elasticity and a cord-shaped heater disposed on the substrate, wherein the temperature control unit is formed by cutting and raising a part of the substrate; and a temperature control unit fixed on the holding unit. A sheet heating element characterized by comprising components.