JPH0213878Y2 - - 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 is formed in such a way that the newly supplied waste water is directly pumped into it, and therefore the newly supplied waste water is likely to be mixed with the remaining hot water and drained, increasing the mixing loss and reducing the amount of waste water. The heat utilization efficiency was poor.

[Purpose of invention]

The present invention aims 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 has a drain port 2 at the top and houses a heat exchanger 3 inside, and the waste water supplied from the waste water supply port 4 passes through a diffuser 5 and enters the inside thereof. supplied to

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 pasted 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 25 extending from a drain port 23 provided at the bottom. Note that the drain pipe 25 is provided with a pot 24 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, and a vent pipe 27 is provided at the upper end of the conduit 26 to penetrate through the tank top lid. Therefore, the drain tank 1 maintains the liquid level h at the level of the drain port 2.

The heat exchanger 3 is threaded around the inside of the discharged 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 installed on the ceiling of the bathroom R, for example. do. In addition, hot water storage tank 3
0 is provided with a hot water supply pipe 31 leading to a bathroom R and the like.

The hot water supply port 4 is an open end of a hot water pipe 33 whose one end is connected to the hot water outlet of the bathtub B, passes through the tank top plate, and opens above the liquid level h.

As shown in detail in FIG. 2, the diffuser 5 has a conied base 9 with a smoothly raised center of a disc, and fins 11 extending from the top to the periphery.
are arranged radially. As clearly shown in FIGS. 1 and 2, the base body 9 is formed to have a larger diameter than the discharged metal supply port 4. The diffuser 5 has its top 10 located below the drained water supply port 4 and is attached to a support 12 rising from the tank bottom plate. In addition, the diffuser 5
is, for example, a hollow body, which can float with its periphery substantially flush with the liquid surface h, and has a cylindrical portion 13 provided below the base body 9.
is loosely inserted into the support column 12 so as to be vertically movable.

Therefore, the drained hot water from the bathtub B flowing down from the drain water supply port 4 through the drain pipe 33 is divided by the fins 11 by colliding with the diffuser 5, and is divided by the fins 11 along the upper surface of the base 9. It flows down the top surface of 5. In addition, since the peripheral edge of the diffuser 5 is approximately at the same height as the liquid level h, the newly supplied waste water flows out radially at a gentle speed near the liquid level h while being diffused. As a result, mixing with remaining hot water is reduced.

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.

The diffuser 5 shown in FIG. 3 has a flat disc-shaped base 9.
fins 1 extending radially to a and extending upward;
1a, the upper end of the fin 11a is inserted into the inner hole of the waste water supply port 4, and the upper surface of the base 9a is positioned near the liquid level h.

Therefore, the drained metal flowing down from the drained metal supply port 4 is divided by the fins 11a, and while it flows through the substantially horizontal upper surface of the substrate 9a while spreading, the drained metal is decelerated and rectified, and reaches near the liquid level h. The liquid is supplied smoothly along the liquid surface, preventing loss of mixing with remaining hot water.

[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 the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a perspective view illustrating a diffuser, and FIG. 3 is a perspective view illustrating another diffuser. 2... Drain port, 3... Heat exchanger, 4... Exhaust water supply port,
5... Diffusion tool.

Claims (1)

[Scope of utility model registration request] In a hot water tank that is provided with a drain port at the top and that supplies waste water and drains excess water from the drain port, the drain water supply port is provided above the liquid level and accommodates a heat exchanger that extracts waste heat from the waste water. Below, a diffuser having a base larger in diameter than the drain water supply port and dispersing the supplied waste water is placed near the liquid surface. A hot water tank characterized in that a ventilation pipe that reaches the bottom and communicates with outside air at the top is connected to a raised conduit.