JPS64454Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an antifreeze tank for flush toilets.

In cold regions, the temperature inside flush toilets often drops below 0°C in winter. Then, the water in the flush water tank attached to the toilet freezes and water stops flowing. Therefore, in order to prevent water from freezing, it was considered to heat the water. To heat the water, it is convenient to use an electric heating element. Conventionally,
Although sheathed heaters have been used as heating elements for underwater use, they have not been used in wash water tanks because their underwater insulation has poor durability and the surface temperature of the heater becomes high. In addition, the water in the tank is agitated every time the cleaning water flows out, so if the heating element is immersed in the water in the tank, the heating element will move and cause problems. It was considered. Therefore, in the past, a heating element was often attached to the outside of the wall of the wash water tank.

Japanese Utility Model Publication No. 49-10984 proposes attaching a planar heating element to the inside of the wall of the wash water tank. That is, the above-mentioned publication proposes that a planar heating element having a watertight structure be mounted on the inner wall surface of the wash water tank so that the water surface is aligned with the location where the water surface is located. According to this proposal, there is an advantage that thermal efficiency is better than when a heating element is attached outside the washing water. However, the thermal efficiency is still not sufficient, and the heating element must be attached by adhesive, so care must be taken when adhering, and once the heating element is attached, it is not easy to replace or move the heating element. There was a drawback. In other words, in the case of this proposal, about half of the heating element's total surface is in contact with the tank wall, so the area for heat transfer to the cleaning water is reduced, and therefore the heating of the cleaning water is efficient. It will not be done. Also, when gluing the heating element, if there is oil or dirt on the surface of the tank, it may cause problems due to poor adhesion.
On the other hand, if the adhesion is good, it becomes difficult to peel off the planar heating element, resulting in a drawback that it is difficult to replace or move the heating element.

The inventor set out to remedy the above-mentioned drawbacks. Noting that wash water tanks always include an overflow pipe to drain excess water, they came up with the idea of fixing the heating element to this pipe. As the heating element, a planar heating element is used, in which the heating element is covered with an electrically insulating resin without any gaps, and this is suspended in the overflow pipe, so that both the front and back sides of the heating element are in contact with the wash water in the tank. It has been found that by doing so, the heating element can be firmly fixed, water can be heated efficiently, the heating element can be easily attached and removed, and all of the above-mentioned drawbacks can be solved. This invention was made based on such knowledge.

That is, this invention attaches a fixture to a heating element in which a sheet heating element is covered with an electrically insulating resin,
Fix the fixture to the overflow pipe in the wash water tank, suspend the heating element in the air, so that both the front and back sides of the heating element can come in contact with the wash water in the tank, and remove the electric wire leading to the heating element from the top of the wash water tank. This is an antifreeze tank for flush toilets that is exposed to the water.

The antifreeze tank for flush toilets according to this invention,
The explanation is as follows based on the drawings. 1st
The figure is a longitudinal cross-sectional view showing an example of an antifreeze tank for a flush toilet according to this invention. 2 is a partially cutaway perspective view showing a fixed state of the heating element in FIG. 1. FIG. FIG. 3 is a partially cutaway plan view showing an example of the heating element used in this invention. Figure 4 shows the third
It is a sectional view taken along the line AA in the figure. Figure 5 shows
FIG. 3 is a partially cutaway perspective view showing a tank wall penetrating portion of the electric wire in this invention.

In Figures 1 and 2, the wash water tank 1
A heating element 2 is attached inside. As the heating element 2, as shown in detail in FIGS. 3 and 4,
A planar heating element 21 covered with an electrically insulating resin 22 is used. As shown in FIGS. 1 and 2, a fixture 3 is attached to one side of the heating element 2, and the fixture 3 is fixed to an overflow pipe 11 provided in the wash water tank 1, and the fixture 3 is attached to one side of the heating element 2. It is suspended in water so that both the front and back sides of the heating element can come into contact with the cleaning water in the tank. An electric wire 4 connected to the heating element 2 extends outside the wash water tank 1 from the top of the wash water tank 1. The antifreeze tank for flush toilets according to this invention is constructed in this way.

In the above-mentioned antifreeze tank, the flush water tank 1 may be attached to a formal flush toilet (10 to 15 flushes of water at a time and purify the flushed water) or a simple flush toilet (one flush toilet). (200 to 300 ml of water is poured into the toilet, and the water is collected in a toilet tank and pumped out.) Further, the tank may be installed near the ceiling of the toilet (high tank) or slightly above the toilet bowl (low tank). A float 12, usually a ball tap, and a water supply valve 13 are installed in the wash water tank.

The planar heating element 21 is made of a conductive material made by mixing carbon black, graphite powder, metal powder, etc. with a synthetic resin such as phenol resin, melamine resin, styrene resin, silicone resin, and a solvent using a roll mill or the like. styrene, acrylic or methacrylic acid esters, amides, nitriles, N-
A conductive composition obtained by polymerizing one or more vinyl monomers such as vinylpyrrolidone and N-vinylcarbazole is coated on glass woven fabric, glass mat, organic fibrous woven fabric, paper, and other appropriate substrates. It is preferable to stabilize the electrical resistance by soaking or impregnating, drying, and then curing, baking, etc., if necessary. The reason for this is that when the above-mentioned material is used, a large amount of heat can be obtained with a small area.

As the electrically insulating resin 22, polyester resin, phenolic resin, and epoxy resin are most preferable, but polyethylene, polypropylene, ethylene-vinyl acetate copolymer, nylon, etc. can also be used. Further, the resin 22 can contain glass fiber. When covering the planar heating element 21 with the resin 22, it is desirable that the resin 22 be brought into close contact with the planar heating element 21 without any gaps and bonded under heat and pressure. In addition, the outer side of the resin 22 is coated with a coating material 2.
It is desirable to cover it with 3. As the coating material 23, Tetoron, polycarbonate, polyimide,
Heat-resistant nylon or the like is used.

The planar heating element 21 has electrodes 24 at both ends.
is attached. A suitable electrode 24 is one in which copper foil is layered on a sprayed metal film. A heating element made of carbon black graft polymer with electrodes attached, coated with electrically insulating resin and molded into a flat plate is commercially available under the trade name "Graft Carbon HE". Such a commercially available product can be used as the heating element 2. Note that the heating element 2 may not be completely flat but may be slightly curved.

It is desirable that a safety device 5 is attached to the heating element 2. Preferably, the safety device 5 includes a thermostat 51 and a temperature fuse 52, as shown in FIG. As the thermostat 51, 0
Close the circuit at ~25℃ (preferably 5℃) 15-35℃
A bimetallic type that opens the circuit at (preferably 17°C) is suitable. The temperature fuse 52 is provided to prevent the temperature from rising too high in the event of a thermostat failure.
It is desirable that the circuit open at ~98℃). The thermostat 51 and temperature fuse 52 are covered with a lid 53 having a dish-shaped recess with the recess facing downward, and an electrically insulating fluid filling (for example, an initial condensation product of epoxy resin) is placed in the recess. It is desirable to fill it. The lid 53 is made of hard rubber, for example.

The shape of the heating element 2 is most preferably a right-angled quadrilateral, but it can also be a polygon other than a right-angled quadrilateral, or a circle. For example, in the case of a right-angled quadrilateral, the dimensions of the heating element 2 are 5 to 15 mm in length or width.
cm (preferably 10cm), thickness 0.5-5mm
(preferably about 1 mm) is appropriate. In addition, the appropriate power consumption is approximately 30 watts when attached to the flush water tank of a formal flush toilet, and 15 watts when attached to the flush water tank of a simple flush toilet. The height at which the heating element 2 is attached is preferably such that at least the upper end of the planar heating element element 21 is located below the water surface.

When attaching the fixture 3 to the heating element 2, it may be attached to one side of the heating element 2. In this case, one side means, if the heating element is a polygon such as a right angled quadrilateral,
It means one side or corner of the heating element, and if the heating element is circular, it means a small part of the circumference.

As shown in FIG. 2, the fixture 3 includes a ring-shaped part through which an overflow pipe can be inserted, and has at least one cut in the ring-shaped part. It is preferable that the protruding pieces 31 protrude in parallel on both sides of the cut, and that the protruding pieces 31 can be tightened with bolts. In addition, although not shown in the drawings, a fixture may also be used that includes a clip-like or clamp-like part that can clamp the overflow pipe. Materials for making fixtures include:
Synthetic resins such as nylon or metals such as stainless steel are suitable.

When taking the electric wire 4 out from the top of the cleaning water tank 1, as shown in FIG.
It is desirable to pass the hole 14 through the upper part of the hole 14.
In many cases, a water supply pipe insertion hole and a hand wash water pipe insertion hole are drilled on both the left and right sides of the wash water tank 1, but since the pipe is only inserted through these holes on either the left or right side, there are no remaining holes. Connect one of the holes to the above electric wire 4.
It is convenient to use it as the hole 14 through which the material passes. Further, as shown in FIG. 5, a short flanged tube 6 made of a flexible material is passed through the electric wire 4, the tube portion 61 is passed through the hole 14, and the flanged portion 62 is attached to the outer wall of the washing water tank 1. When they come into contact, the wire insertion portion becomes beautiful, which is preferable. Furthermore, when the ring 7 is fitted into the tube part 61,
Detachment of the tube portion 61 is prevented. Note that if the short flanged tube 6 is provided with a slit 63 extending in the radial direction, it will be easier to insert the electric wire therethrough.

According to this invention, since a planar heating element element is used in the heating element, the surface of the heating element can be enlarged to expand the contact surface with water, and therefore water can be heated efficiently. I can do it. In addition, since the surface of the sheet heating element element is covered with an electrically insulating resin to form a heating element, the heating element has electrical insulation and water resistance, and therefore can be submerged in water and heated with electricity. Water can be heated safely, easily, and directly using electricity without leaking electricity. Furthermore, since we attached a fixture to the heating element and fixed the fixture to the overflow pipe, the heating element can be suspended in the water in the tank, and even if the water in the tank flows, it will still generate heat. It is becoming difficult to move my body. In addition, the heating element is suspended in the air so that both the front and back sides of the heating element can come into contact with the washing water in the tank, so all the heat from the heating element is transferred directly to the water, thus efficiently heating the water. can do. Furthermore, by removing the fixture, the heating element can be easily removed, replaced, or moved. Furthermore, the antifreeze tank for flush toilets according to this invention has a simple structure and can be supplied at low cost. Therefore, the antifreeze tank for flush toilets according to this invention has extremely great practical value as a flush water tank for flush toilets in cold regions.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing an example of the antifreeze tank for flush toilets of this invention, Fig. 2 is a partially cutaway perspective view showing the fixed state of the heating element in Fig. FIG. 4 is a partially cutaway plan view showing an example of a heating element used in the invention; FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3; FIG. FIG. 3 is a cutaway perspective view. In each figure, 1 is a cleaning water tank, 2 is a heating element, 3 is a fixture, 4 is an electric wire, 5 is a safety device, 6 is a short pipe with a flange, 7 is a ring, 11 is an overflow pipe, 12 is a float, 13 is a water supply valve, 14 is a hole,
21 is a planar heating element, 22 is an electrically insulating resin, 23 is a coating material, 24 is an electrode, 31 is a protruding piece, 51 is a thermostat, 52 is a temperature fuse, 53 is a lid, 61 is a tube portion, 62 is the flange, and 63 is the split.

Claims (1)

[Scope of utility model registration request] A fixing device is attached to the heating element, which is a planar heating element covered with an electrically insulating resin, and the fixing device is fixed to the overflow pipe in the wash water tank.The heating element is suspended in the air, and both the front and back sides of the heating element are An antifreeze tank for flush toilets that allows contact with the flushing water in the tank and has an electric wire connected to a heating element coming out from the top of the flushing water tank.