JPH0213879Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a discharged hot water tank that reduces mixing of newly supplied discharged hot water with previously stored residual hot water.

[Background technology]

BACKGROUND ART A hot water tank is known that stores waste water from a bath or the like and uses the waste heat to perform air conditioning or hot water supply.

In addition, most of these types of waste water tanks are of a type that automatically drains excess remaining hot water by supplying new waste water, but conventional For example, as shown in Fig. 2, a drain port a opens at the top of a tank b, and the drained hot water flows through a hot water supply pipe c that hangs down from above.
Therefore, the newly supplied waste water tends to be mixed with the remaining hot water and drained as it is, increasing mixing loss and lowering the heat utilization efficiency of the waste water.

(Purpose of the invention) The purpose of the invention is to provide a drained hot water tank that can prevent mixing loss and solve the above-mentioned problems by slowly supplying newly supplied drained hot water near the liquid surface. .

[Disclosure of invention]

The following is an example of a case where the waste water tank of the present invention is used to store bath water from bathtub B as waste water.
One embodiment thereof will be described based on the drawings.

In the figure, a waste water tank 1 is equipped with a drain port 2 at the top, houses a heat exchanger 3 inside, and has a waste water supply pipe 6 that is opened substantially upward and near the liquid level h. let

The hot water tank 1 is, for example, a container body installed with its lower part submerged in the subfloor surface below the bathroom R,
A heat insulating material 21 is attached around it to keep it warm.

The drain port 2 is the open end of an upper drain pipe 22 that penetrates above the side wall of the tank, and the upper drain pipe 22 is connected to a drain pipe 24 extending from a drain port 23 provided at the bottom. Note that the drain pipe 24 is provided with a pot 25 on the upstream side of the connection point.

A vertical conduit 26 whose lower end reaches the bottom of the tank is attached to the open end of the upper drain pipe 22, so that the upper drain pipe 22 and the conduit 26 form an inverted U.
A shape tube 28 is formed. Moreover, at the upper end of the conduit 26,
A ventilation pipe 27 that penetrates the tank top lid is installed in series, so that the drain tank 1 has a liquid level h at the height of the drain port 2.
keep it.

The heat exchanger 3 spirally circulates inside the hot water tank 1, and has one end connected to a city water pipe 29 via a pipe, and the other end communicates with a hot water storage tank 30 provided on the ceiling of the bathroom R, for example. do. Note that the hot water storage tank 30 is provided with a hot water supply pipe 31 that communicates with the solution chamber R and the like.

The hot water supply pipe 6 has one end connected to the hot water outlet of the bathtub B, passes through the upper plate of the tank, is bent inside the tank, and has its upper end facing substantially upward.
Further, its open end, that is, the discharged hot water supply port 4 opens slightly below the liquid level h. Note that the drain pipe 6 can also pass through the side wall of the tank, and only the tip thereof can be bent upward.

Therefore, the hot water from the bathtub B flowing from the hot water supply port 4 through the hot water pipe 6 gradually spreads as if it were gushing out, hitting the liquid level h and gently pushing down the remaining hot water. Reduce mixing with residual water.

As new hot water is supplied, excess water from the remaining hot water rises up the conduit 26 and is automatically drained from the drain port 2, keeping the liquid level h constant. There is no mixing with new waste water, and therefore only the excess water that has become low temperature and has accumulated below is discharged, improving the waste heat utilization efficiency of the waste water. Note that the hot water exchanged with waste water by flowing city water into the heat exchanger 3 is transferred to the hot water storage tank 30.
can be supplied to Note that the air for air conditioning can be heated by the heat exchanger 3, and a heat pipe can also be used as the heat exchanger 3.

[Effect of idea]

In this way, the waste water tank of the present invention can supply newly supplied waste water smoothly while reducing the flow velocity along the liquid surface, and therefore only low-temperature water that has completed heat exchange can be drained from the drain port. It can bring about many effects, such as reducing the mixing loss associated with mixing and improving the efficiency of utilizing waste heat of waste water.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a sectional view illustrating a conventional tank. 2... Drain port, 3... Heat exchanger, 4... Exhaust water supply port, 6... Hot water supply pipe, 27... Ventilation pipe, 28...
Inverted U-shaped tube, h...liquid level.

Claims (1)

[Scope of utility model registration request] A hot water tank that is equipped with a drain port at the top and that supplies waste hot water and drains surplus water from the drain port, which houses a heat exchanger inside that takes out the waste heat of the waste hot water and also supplies the waste hot water. A drain tank characterized in that a supply pipe is opened substantially upwardly and near the liquid level inside the drain tank, and the drain port is connected to a conduit whose lower end reaches the bottom of the tank.