JPS6172955A - Circulating hot-water supplier - Google Patents

Abstract

PURPOSE:To save the capacity of a hot-water reserving tank as well as the input of a heating device by a method wherein hot-water is used for the supply of hot-water and returned hot-water is returned quietly into the hot-water layer at the upper layer of the hot-water tank to circulate it without mixing with cold water. CONSTITUTION:Water is supplied into the hot-water reserving tank 1 from the lower part thereof through a pipeline 7 and the water is sent into the heating device 2 by a pump 4 through the pipeline 6 to heat it while the hot-water is poured into the upper part of the hot-water reserving tank 1. The hot-water is circulated from the upper layer of the tank 1 by the pump 4' through the pipeline 8 and the pipeline 9 and the hot-water is taken out by hot-water cocks 3, 3. The upper layer in the tanks 1 becomes hot-water layer 10 and the lower layer becomes cold water layer 11 whereby piston flow is formed in the tank 1. Members for detecting ambient temperatures are attached to many places on the pipeline 5 at the tip end of the pipeline 9 to detect the temperature of the hot-water layer 10 and returned water is returned from these places into the hot-water layer 10 while the hot-water is circulated from the pipeline 8 by the pump 4' under preventing it from being mixed with the cold water.

Description

[Detailed description of the invention] B. Industrial application field When hot water is supplied from a water heating device to a remote location, in order to always take out hot water, the hot water must be constantly circulated through a circulation line. Hot water is taken out from the middle of the line, and the hot water storage tank installed to withstand fluctuations in load is used as a hot water storage tank with a hot water circulation method for thermally efficient use. It provides a circulation device to reach the

BACKGROUND OF THE INVENTION A hot water storage tank used for supplying hot water using the conventional circulation method is usually used to withstand load fluctuations due to opening and closing of hot water taps, and the water temperature in this hot water tank is maintained at the desired hot water temperature over its entire capacity. Keeps it warm. Therefore, the total volume of A'4 in the hot water storage tank was large, and the imp/nod of the heating device had to be made large to speed up the recovery from a drop in hot water temperature due to a large load.

C3 Problems to be solved by the invention Therefore, when setting the capacity of the hot water storage tank and the input of the heating device corresponding to the maximum IT load, these are both quite large, so the hot water in the hot water storage tank is The idea is to save the capacity of the hot water storage tank and the input of the heating device by returning the circulating return hot water to the hot water layer of the hot water storage tank.

20 Effects The amount of hot water used by this circulation line is that initially the entire capacity of the hot water storage tank is water, but the hot water is introduced from the bottom of the tank to a heating device and heated to make hot water, which is then injected from the top of the tank. Then, by using this hot water for hot water supply and gently returning the returned hot water to the hot water layer in the upper layer of the hot water storage tank, hot water can be supplied from the upper hot water layer again without mixing the hot water and cold water in the hot water storage tank. This is to circulate the water.

Therefore, as the boundary between the hot and cold water layers in the hot water storage tank changes due to fluctuations in the amount of hot water used for hot water supply, it is necessary to ensure that the injection point of the return gamma is always slightly above the boundary line. Therefore, the return hot water injection pipe is raised from the bottom to the top of the hot water storage tank, the temperature is sensed by the injection pipe to determine its position, and the return hot water is injected into the hot water storage tank from the above-mentioned height position.

E, Example Next, the structure of the present invention will be explained in detail with reference to embodiment figures.

Water is supplied from the lower part of the hot water storage tank (1) through piping (7), and a heating device (2) is supplied from the lower part of the hot water storage tank (1).
The hot water is pumped through piping (6) to pump (4) and heated, and hot water is injected into the hot water storage tank (1) from the top.
) Circulate through piping (9) and start from the hot water tap (3) (3)-・
・In a hot water supply system using a circulation system that takes out circulating hot water, the hot water heated by the heating device (2) is injected from the top of the hot water storage tank (1), so the inside of the hot water storage tank (1) rises and the hot water 1 (10 ), the bottom is the cold water layer (11), and in order to form a so-called piston flow in which these two layers move up and down according to the amount of hot water withdrawn, the hot water sent from the circulation line is transferred to the hot water storage tank (11) in order to prevent these two layers from mixing as much as possible. ), the tip of the pipe (9) is raised from the bottom of the hot water tank (10), and members for sensing the ambient temperature are attached to multiple points of the pipe (5) in the hot water storage tank (1). Detects the temperature and overflows the return hot water from that area to create a warm water layer (
10), and while preventing mixing, the hot water is circulated again through the piping (8) by the pump (4).

The operation will be explained with reference to FIG. 2, which shows an example of a large number of overflow parts attached to the rising pipe (5).

A large number of temperature sensing valves (12) are installed above and below the rising pipe (5), and the shape is such that a normal coil spring (16) and a shape memory alloy coil spring (15) push the shaft of the valve (13) against each other. When the surrounding temperature is lower than a predetermined temperature, the coil spring (16) presses the shape memory alloy coil spring (15) and closes the valve port (14) with the valve body (13), so that the hot water does not flow. Because it does not flow out from the overflow port (14"), the hot water storage tank (1
) The hot water returns to the cold water layer (11) in the hot water layer (10) without flowing out.
), the shape memory alloy coil spring (15) remembers its pre-memorized shape due to the temperature of the hot water and presses it against the pressing force of the coil spring (16). The valve body (13) leaves the valve port (14) and the returned hot water flows upward from the overflow port (14'), so the warm water layer (10
) take a bath inside. In addition, in order to ensure that the return hot water of the temperature-sensing pulp (12) to be bathed only flows out from this point, a heavy piston (17) is slid in the piping (5) so as to be able to move up and down. Return hot water flows out only slightly above the layer boundary, further ensuring the retention of these two layers.

Next, returning to FIG. 3, we show the overflow port portion of another embodiment of the hot water, which is constructed using the shape memory alloy wound spring shown in FIG. 2 (
15), a shape memory alloy plate (15°) is used to open the hot water overflow port using this deformation caused by temperature.

That is, in order to make the surface of the opening (14a) of the pipe (5) flat, this opening (14
The shape memory alloy Fj, (15'') is a rectangular plate that is large enough to close the shape of the shape memory alloy Fj (15'') and has the posture memorized as shown in the figure.
15'') to close the opening (14a), and a heavy mother piston (17) is placed above the opening (14a) within the piping (5) as in FIG.

9. Effects of the Invention As described above, the present invention provides a hot water layer in the upper layer, A piston flow is formed with a cold water layer as the lower layer, and when the residual hot water used in the circulating supply circuit is received into the hot water storage tank of the piston flow, it overflows slightly above the boundary line in the hot water layer. Since the piston flow is maintained stably, the capacity of the hot water storage tank and the input of the heating device are saved.In recent years, a heat pump used for space equipment has been used as a method of heating, but in this case, Since the effluent sent from the hot water storage tank is always cold water, the efficiency of the heat pump is advantageous, so the effects of the present invention in this case are even greater.

[Brief explanation of the drawing]

Fig. 1 is a system diagram of hot water supply in the implementation of the present invention, Fig. 2 is a vertical cross-sectional view showing the structure of the overflow part of the return hot water, and Fig. 3 is a different form of the overflow part of the return hot water. FIG. (1) - Hot water storage tank, (2)... - Heating device, (3
)・-・Hot water faucet, (4) (4') ~ pump, (5) (
6) (7) (8) (9) - Piping, (10) - Hot water layer, (11) - Cold water layer, (12) - Temperature sensing valve,
(13) - Valve body, (14) - Valve port, (14'
)--Overflow port, (14a) -Opening, (14b
) One member, (15) - Shape memory alloy leaf spring, (15
“) - shape memory alloy plate, (16) - coiled spring, (17)
-・M quantity piston. 2nd 8th

Claims (1)

[Claims] (1) A piston-flow type hot water storage tank in which a low-temperature water layer is formed at the bottom and a hot water layer at the top, and a heating line that heats the low-temperature water from the bottom of the low-temperature water layer and returns it to the top of the hot water layer;
A circulation line is provided which leads out hot water from the hot water layer and returns it to the upper hot water layer avoiding the lower low temperature water layer of the hot water storage tank, and has a hot water tap in the middle, and cold water from outside is introduced into the lower part of the low temperature layer. A circulating hot water supply device comprising a water supply line.