JPH071065B2 - Hot water recovery device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water recovery device for selectively separating and recovering a large amount of hot water discharged from a waste water source having large fluctuations in waste water temperature and flow rate. It is a thing.

2. Description of the Related Art In recent years, it has become necessary to selectively collect only a large amount of hot water discharged from the viewpoint of energy saving or prevention of exhaust heat pollution due to hot water.

For this purpose, as a conventionally known technique, for example, a temperature sensor for measuring the temperature of hot water and an automatic valve controlled in conjunction with the measured value of the temperature sensor as shown in FIG. Possible configurations. The conventional control method will be described below with reference to FIG.

In FIG. 3, 1 is a distribution pipe, 7 is a temperature sensor for detecting the temperature of flowing water, 10 is a distribution pipe for flowing hot water, 11 is a distribution pipe for flowing flowing water other than warm water, and 8 is outflow of flowing water. A switching valve for controlling the tip to either the water distribution pipe 10 or the water distribution pipe 11, and 9 is a controller for controlling the switching valve 8 based on the measurement value of the temperature sensor 7. The operation of the abnormal configuration will be described.

The temperature of the flowing water measured by the sensor 7 is the controller 9
If the temperature is above the set temperature, the switching valve 8 is controlled to
The hot water can be selectively made to flow to the water distribution pipe 10 by guiding the running water to 10 and, conversely, when the temperature is lower than the set temperature, by switching the switching valve 8 and guiding the water to the water pipe 11. .

Problems to be Solved by the Invention However, in the above-mentioned configuration, since the electric control is performed, the control mechanism is composed of electrical and mechanical operating parts, and the device becomes relatively expensive. However, there is a possibility of mechanical and electrical failure, and there is also a problem that it does not operate during a power failure. In addition, since inorganic and organic impurities contained in the running water cause scales and microorganisms to be clogged in the operating part and packing part of the switching valve 8,
There is a problem in that the switching valve 8 may malfunction or close, which requires regular maintenance.

The present invention solves the above-mentioned problems of the prior art, and an object thereof is to selectively separate hot water by a simple method.

Means for Solving Problems The first aspect of the present invention is to provide a water pipe that takes in hot water or cold water drainage from a drainage inlet to a drainage outlet, and is provided inside the water distribution pipe. The shape memory alloy is deformed by the temperature of the drainage flowing inside, and the flow control mechanism that controls the flow rate of the drainage in the water distribution pipe by changing the cross section of the opening due to the deformation of the shape, and the drainage inlet of the water distribution pipe And a position where the flow rate control mechanism is provided, a branch pipe directly connected to the water distribution pipe is provided, and the flow rate control mechanism controls the flow rate of the water distribution pipe by the temperature of the drainage flowing, The hot water at the time of discharging the hot water is collected from the drain outlet of one of the water distribution pipe and the branch pipe. Secondly, in addition to the above configuration, an opening provided in the water distribution pipe between the drainage inlet of the water distribution pipe and a position where the branch pipe is provided, and in the flow control mechanism. A hot water recovery device provided with a new flow control mechanism that restricts the amount of passing water at the position by an opening having a cross-sectional area smaller than the maximum cross-sectional area of the portion and prevents the accumulation of drainage generated by the first flow control mechanism. Operation In the above configuration, when the opening of the control mechanism is controlled by the temperature of the hot water to control the flow rate of the hot water and a part of the hot water or the cold water is collected from one of the water distribution pipe or the branch pipe to collect the hot water. In addition, by not including an electric element, an inexpensive and highly reliable hot water recovery means is provided.

First Embodiment A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a hot water recovery system according to a first embodiment of the present invention. In FIG. 1, 1 is a water distribution pipe, 2 is a branch pipe for selectively flowing hot water, and 3 is a control mechanism whose opening changes depending on temperature.

The operation of the above configuration will be described.

First, running water flows through the water pipe 1 from above in FIG.
At this time, if the temperature of the flowing water is low, the opening of the control mechanism 3 has a sufficient size, so that the flowing water passes through the opening and flows downstream. On the other hand, when the flowing water is at a high temperature, the opening of the control mechanism 3 is reduced, so that the flow rate of the flowing water that can pass through the opening is limited per unit time. Therefore,
When a large amount of running water that can pass through the reduced opening flows down within a unit time, a part of it cannot pass through the control mechanism 3 and stays upstream thereof. Then, when the water level of the accumulated water reaches the branch portion with the branch pipe 2, the flowing water in an amount equal to or more than the amount limited by the control mechanism 3 is discharged through the branch pipe 2. On the other hand, when the temperature of the flowing water has decreased, a certain amount of the flowing water continues to pass through the control mechanism 3, so the control mechanism 3 detects it and widens the opening,
Since the limit value of the flow rate is increased, the retention is eliminated and the branch pipe 2
Chilled water will no longer flow into.

With such a configuration, it is possible to selectively separate and use only the hot waste water discharged in a large amount by the branch pipe 2.

In this embodiment, even if the opening of the control mechanism 3 is in an open state, if the cross-sectional area is smaller than the pipe diameter, the resistance against water flow is obtained. Therefore, even if a large amount of low-temperature water flows, it is possible that the water stays and flows into the branch pipe 2. In such a case, the restriction unit 4 is provided further upstream than the branch point with the branch pipe 2 and the amount of water passing through is smaller than that in the case where the control mechanism 3 is in the open state with the same configuration as the control mechanism 3. It suffices if the retention of the mechanism 3 does not occur.

An example of the control mechanism 3 is shown in FIG.

In FIG. 2, reference numeral 1 is a water distribution pipe, 3 is a control mechanism, and is composed of an impermeable valve 5 made of plastic, rubber, metal or the like. The upper end of the valve 5 is in close contact with the pipe 1, and the lower end contracts the shape memory alloy ring 6 formed into a coil.
Deforms according to opening.

When hot water flows, the temperature of the shape memory alloy rises and the ring 6 contracts into a coil shape, so that the diameter of the ring 6 becomes smaller. On the other hand, when the water temperature decreases, the elasticity of the coil is lost, so that the coil portion is plastically deformed by being expanded by water pressure or the like, and the opening area of the control mechanism 3 is enlarged.

Here, an example in which the opening is reduced by contraction at high temperature has been shown, but enlargement of the opening at high temperature using means such as thermal expansion or shape memory alloy can be easily realized.

Needless to say, it is also possible to easily separate only the low temperature water by enlarging or reducing the opening when the water temperature is lower than the room temperature by a similar mechanism.

As described above, according to the present invention, by controlling the open area of the control mechanism provided in the water distribution pipe by the temperature of the flowing water, the high-temperature or low-temperature flowing water collectively discharged is efficiently collected and reused. You can, and the effect is great.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a hot water recovery device according to a first embodiment of the present invention, FIG. 2 is a perspective view of the hot water recovery mechanism of FIG. 1, and FIG.
The figure is a block diagram of a conventional hot water recovery device. 1 ... Water distribution pipe, 2 ... Branch pipe, 3 ... Control mechanism, 4 ...
Restriction part, 5 ... Valve, 6 ... Ring.

Claims (2)

[Claims] 1. A water distribution pipe that takes in hot water or cold water drainage from a drainage inlet to the drainage outlet, and a shape memory alloy is provided inside the water distribution pipe, depending on the temperature of the drainage flowing in the water distribution pipe. Deformation, the flow control mechanism that controls the flow rate of drainage in the water distribution pipe by changing the cross-sectional area of the opening due to the deformation of the shape, the position at which the drainage inlet of the water distribution pipe and the flow control mechanism are provided. And a branch pipe directly connected to the water distribution pipe, and the flow rate control mechanism controls the flow rate of the water distribution pipe according to the temperature of the flowing waste water, thereby draining one of the water distribution pipe and the branch pipe. A hot water recovery device for recovering the hot water from the outlet when the hot water is discharged. 2. A water distribution pipe that takes in hot water or cold water drainage from a drainage inlet and leads to the drainage outlet, and a shape memory alloy of the shape memory alloy is provided inside the water distribution pipe and the temperature of the drainage flowing in the water distribution pipe. The shape is deformed, and the cross-sectional area of the opening is changed by the deformation of the shape. A first flow rate control mechanism that controls the flow rate of drainage in the water pipe, a drainage inlet of the water pipe, and the first Between the position where the flow control mechanism is provided, the branch pipe directly connected to the water distribution pipe, and between the drainage inlet of the water distribution pipe and the position where the branch pipe is provided, inside the water distribution pipe. An opening provided and having a cross-sectional area smaller than the maximum cross-sectional area of the opening in the first flow rate control mechanism restricts the amount of passing water at that position, and prevents retention of drainage caused by the first flow rate control mechanism. Second flow rate control The first flow rate control mechanism controls the flow rate of the water distribution pipe according to the temperature of the flowing waste water, so that the hot water is discharged from one of the water discharge outlets of the water distribution pipe or the branch pipe. A hot water recovery device for recovering the hot water.