JPS61137932A - Drain apparatus of bathtub - 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 Field of the Invention The present invention relates to a bathtub water supply and drainage device for draining water from a bathtub and supplying water to the bathtub.

BACKGROUND ART In a conventional bathtub, as shown in FIG. 2, the hot water in the bathtub 1o1 after use is directly drained into a sewer pipe 103 through a drain pipe 102. On the other hand, for water supply, cold water is heated by a fossil fuel heating device 104 or a solar water heater, and this hot water is passed through a water supply pipe 106 to the bathtub 1o.
1.

Problems to be Solved by the Invention As described above, in the conventional bathtub water supply and drainage system, the energy required to heat the supplied water is actually discarded as waste water. This amount of energy corresponds to about one-third of the energy consumption in a home, and is a major problem in terms of home energy conservation.

Therefore, the present invention temporarily stores the thermal energy of wastewater, which conventionally was discarded as hot water, and uses this thermal energy to preheat cold water when water is supplied, thereby reducing the energy consumption required to raise the temperature. The purpose of the present invention is to provide a bathtub water supply and drainage device that can

Chisunari to Solve the Problems The bathtub water supply and drainage system of the present invention which solves the above-mentioned problems comprises a heat storage container having a heat insulating structure, a heat storage body housed in the heat storage container, and an intermediate portion of the heat storage container. It is equipped with a drain pipe and a water supply pipe inserted into the heat storage body.

Effect of the Invention With the above configuration, the present invention exchanges heat from the bathtub with the heat storage body in the heat storage container, temporarily stores the thermal energy of the hot water in the heat storage body, and exchanges heat with the heat storage body for cold water when water is supplied. The cold water is preheated by the thermal energy stored in the heat storage body.

Thereby, when water is supplied to a water heater or a bathtub, the amount of energy consumed for additional heating required to raise the water temperature to the operating temperature can be reduced.

EXAMPLE Hereinafter, an example of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a heat storage container 1 is hermetically sealed with a heat insulating structure, and a heat storage body 2 is housed inside the heat storage container 1. An intermediate portion of a drain pipe 3 connected to the bottom of a bathtub (not shown) is inserted into the heat storage body 2 of the heat storage container 1 in a zigzag shape. The middle part of the water supply pipe 4 for supplying water directly to the bathtub or indirectly to the heating device is the heat storage body 2 of the heat storage container 1.
It is inserted in a zigzag pattern. Heat exchange fins 6 and 6 are attached as heat exchange means to the insertion points of the heat storage body 2 in the drain pipe 3 and the water supply pipe 4 so that the contact area with the heat storage body 2 is widened.

The drain pipe 3, the water supply pipe 4, and the heat exchange fins 6 and 6 are coated on their surfaces with a polymeric material having relatively high thermal conductivity in order to completely prevent corrosion caused by the heat storage body 2, if necessary.

By the way, the capacity of a bathtub at home is approximately 3,001 cm.
The water temperature at the time of drainage is approximately 40'C. As a test example of the above embodiment, the heat storage body 2 was prepared by mixing sodium sulfate decahydrate, which is the base heat storage material, with sodium carbonate IJ 1O hydrate and sodium chloride to lower the phase transition point of the base body itself. In addition, a latent heat/heat storage material -+ookg was used, which had a thickening agent added to prevent phase separation, had a phase transition point at 26''C, and had a latent heat aocsg19. Heat is discharged from the pipe 3 and stored in the heat storage container 1.

Body 2f: The temperature of the heated wastewater after passing through is 29°C,
, 3300 Kcae of energy was stored in the heat storage body 2. Also, the next day, when tap water at 12°C, which is the typical city water temperature in winter, is supplied to the bathtub through the water supply pipe 4 through the heat storage element 2, the water temperature at the outlet will be 20°C on average, and this will change the temperature of the water from the previous day. We were able to recover 24,001 Ccad of energy from heated wastewater.
The energy required to raise the temperature from 2°C to 42°C for bathing can be calculated in 9000KC1ag, so the device in this test example normally recovers 27.5 kg of the energy required for bathing from the previous day's heated wastewater and We were able to reduce heating and energy consumption for the bathtub. In addition, the latent heat storage body used in this test example weighed 100 kg, and it was possible to store energy in a volume of about 4 oe of the row compared to the drainage volume of the bathtub.

Next, a second test example of the present invention will be explained.

In this test example, water 2oOe, which is a sensible heat storage material, was used as the heat storage body 2. The recovered energy in this case is approximately 20
I was lucky with 00Kcad. When water is used as the heat storage body 2, the volume increases, but corrosion is small, so there is an advantage that a heat exchange means can be used without applying a coating or the like.

In addition, in the above embodiments and examples, 1'C regarding the latent heat and heat storage body is
Although an example using sodium sulfate monohydrate as the base material has been described, it is also possible to use a latent heat storage body using, for example, calcium chloride hexahydrate as the base material. Regarding the sensible heat storage body, in addition to the above embodiments, for example, building materials such as concrete can also be used; in this case,
It is also possible to have a structure in which heat is stored under the washing area of the bathtub. In addition to the fin type heat exchange, it is also possible to use, for example, a flat plate formed by providing a gap flow path between two metal plates and press them together, or a multi-bent pipe type.

Effects of the Invention As is clear from the above explanation, according to the present invention, a heat storage body is housed in a heat storage container having an adiabatic structure, and the intermediate portions of the drain pipe and the water supply pipe are inserted into the heat storage body of the heat storage container. The hot water energy from the discarded bathtub can be temporarily stored in a heat storage body, and new water supply energy can then be supplied to the bathtub, reducing the amount of energy consumed to raise the temperature for bathing. This has the effect of contributing to energy conservation.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the bathtub water supply and drainage system of the present invention, and is a partially cutaway perspective view of a heat storage part, and FIG. 2 is a schematic diagram of a conventional bathtub water supply and drainage system. 1... Heat storage container, 2... Heat storage body, 3.
...Drain pipe, 4...Water pipe, 6,6...
...Heat exchange fins. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (4)

[Claims] (1) A heat storage container having a heat insulating structure, a heat storage body housed in the heat storage container, and a drain pipe and a water supply pipe that are inserted into the heat storage body of the heat storage container and communicated with the bathtub. Bathtub water supply and drainage equipment. (2) The bathtub water supply and drainage system according to claim 1, wherein the heat storage body uses a latent heat storage material whose main constituent is sodium sulfate decahydrate or calcium chloride hexahydrate. (3) The bathtub water supply and drainage device according to claim 1, wherein concrete or water is used for the heat storage body. (4) The bathtub water supply and drainage apparatus according to claim 1, wherein heat exchange means is provided in the heat storage body insertion portions of the drain pipe and the water supply pipe.