JPH0239172Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hot water storage type water heating device that can store heated water inside a hot water storage tank and obtain hot water from the hot water storage tank.

[Conventional technology]

2. Description of the Related Art Conventionally, there is a hot water storage type water heater that heats water inside a hot water storage tank through a heating device equipped with a suitable heat exchanger, and then stores the heated water inside the hot water storage tank again. In this type of hot water storage type water heater, a hot water supply pipe is connected to the top of a hot water storage tank. A faucet is connected to the hot water pipe, and when the faucet is opened, the hot water inside the hot water tank can be obtained.

An outlet of a water supply pipe for introducing water from the outside is located at the inner bottom of the hot water storage tank. When hot water is supplied, water is supplied to the inner lower part of the hot water storage tank through a water supply pipe. At the same time, the hot water inside the hot water tank is pushed up. Therefore, only hot water can be obtained from the hot water pipe.

Also, heating of the water inside the hot water storage tank is usually performed late at night. For transportation, the hot water inside the hot water storage tank will be used during the daytime hot water supply time.

[Problem that the invention attempts to solve]

However, in such hot water storage type water heaters, the heating capacity of the heating device is small, so if the hot water inside the hot water storage tank is used up during hot water supply hours, for example during the day, the heated water will be stored inside the hot water storage tank again. It takes time to do that. As a result, low-temperature hot water or water may flow out of the hot water pipe.

Therefore, an object of the present invention is to provide a hot water storage type water heater that can efficiently supply heated water using a heat exchanger when there is a shortage of hot water inside the hot water storage tank during hot water supply hours. .

[Means for solving problems]

According to the present invention, a hot water storage tank includes a hot water storage tank for storing hot water, a water supply pipe having an outlet near the inner bottom surface of the hot water storage tank, and a hot water supply pipe for supplying hot water connected to the upper part of the hot water storage tank. The hot water system has a hot water pipe connected at one end to the lower part of the hot water storage tank, a heat exchanger provided in the hot water pipe, and a discharge port connected to the other end of the hot water pipe in the hot water storage tank. The hot water discharge pipe includes a hot water discharge pipe and a thermally responsive member located in an intermediate level layer in the hot water storage tank that expands and contracts depending on the temperature, and the hot water discharge pipe is movable in a direction to move the position of the discharge port up and down. There is obtained a hot water storage type hot water device characterized in that the hot water discharge pipe is driven by the expansion and contraction of the thermally responsive member.

〔Example〕

FIG. 1 shows an embodiment of the hot water storage type water heater of the present invention.

The illustrated hot water storage type water heater includes a hot water storage tank 1 for storing hot water, and a heat exchanger 3 for heating the water inside the hot water storage tank 1. A hot water discharge body 5 is provided on the inner wall of the hot water storage tank 1, facing the intermediate level layer B of the hot water storage tank 1. The hot water discharge body 5 has a support member 7 extending in the vertical direction of the hot water storage tank 1. The support member 7
A hot water discharge pipe 10 is rotatably attached to the upper part of the tube by an attachment part 8. Hot water discharge pipe 10
extends laterally within the hot water storage tank 1 from the attachment portion 8. A discharge port 12 is provided at the tip of the hot water discharge pipe 10.
is formed. Support member 7 and hot water discharge pipe 10
are connected to each other by a thermally responsive member 15. As the thermally responsive member 15, for example,
It uses a reversible shape memory alloy coil that expands and contracts according to the set temperature of 45°C. In this way, the position of the discharge port 12 of the hot water discharge pipe 10 is automatically changed in accordance with the temperature change of the intermediate level layer B of hot water in the hot water storage tank 1.

As can be seen from FIG. 2, the tip of a hot water conduit 17 led from the heat exchanger 3 is inserted into the opening at the top of the attachment part 8 of the hot water discharge pipe 10. This hot water conduit 17 is drawn out from the lower part of the hot water storage tank 1, and is passed through the heat exchanger 3 to the hot water discharge pipe 10.
It extends to the mounting part 8 of the.

On the other hand, inside the hot water storage tank 1, a water supply pipe 20 for storing tap water or the like in the hot water storage tank 1 is provided. The tip, or outlet, of the water supply pipe 20 is located near the bottom of the hot water storage tank 1. A hot water supply pipe 22 for supplying hot water is connected to the upper part of the hot water storage tank 1. A faucet 25 is connected to the hot water supply pipe 22.

Now, when water flows into the tank 1 from the water supply pipe 20 and the hot water storage tank 1 becomes full, the water supply valve (not shown) is closed by the float 27 provided at the top of the hot water storage tank 1, and water is supplied. will be stopped. In this state, heated water is normally produced through the hot water conduit 17 connected to the heat exchanger 3 using late-night electricity. The heated water passes through the hot water discharge pipe 10 from the attachment part 8 of the hot water discharge body 5, and is returned to the inside of the hot water storage tank 1 through the discharge port 12. Therefore, heated water is stored inside the hot water storage tank 1.

When the faucet 25 is opened, hot water in the upper level layer A of the hot water storage tank 1 is discharged through the hot water supply pipe 22. As a result, when the water level inside the hot water storage tank 1 decreases,
Water is supplied into the tank 1 through a water supply pipe 20. The hot water in the tank 1 is pushed up by this make-up water.

By the way, normally, the hot water in the upper level layer A inside the hot water storage tank 1 has a relatively high temperature (about 45 degrees), and the hot water in the lower level layer C inside the hot water storage tank 1 has a relatively low temperature (about 20 degrees Celsius). degree), and hot water storage tank 1
The hot water in Layer B is in the intermediate temperature range between low temperature (20 degrees Celsius) and high temperature (about 45 degrees Celsius).

Now, if the low temperature water has risen to the intermediate level layer B, that is, if the intermediate level layer B is at a low temperature,
The thermally responsive member 15 extends and directs the outlet 12 of the hot water discharge pipe 10 upward. In this state, heated water is discharged from the discharge port 12 through the heat exchanger 3. on the other hand,
When the low temperature water inside the tank 1 is below the intermediate level layer B, that is, when the intermediate level layer B is above the intermediate temperature, the thermally responsive member 15 contracts and the hot water discharge pipe 1
The discharge port 12 of No. 0 is directed downward, and heated water is discharged from the discharge port 12.

In this way, when the middle level layer B is at a low temperature, hot water can be efficiently stored in the tank 1 by supplying hot water only to the upper level layer A, so that the faucet 25 always has a relatively high temperature ( Only hot water (45℃) will be available.

In addition, the hot water discharge pipe 10 of the thermally responsive member 15 includes:
When the float 30 is provided, the hot water discharge pipe 10 can be rotated upward more quickly due to its buoyancy.

[Effect of idea]

As explained above, according to the hot water storage type water heater of the present invention, a thermally responsive member that drives a movable hot water discharge pipe that discharges warm water is provided in the vertically intermediate level layer of the hot water storage tank, and Depending on the temperature of the layer, the position of the outlet of the hot water discharge pipe is automatically switched between the upper position and the lower position, and heated water is supplied above the low-temperature water. Also, a hot water storage type water heater that can quickly assist in hot water supply can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of the hot water storage type water heater of the present invention, and FIG. 2 is a perspective view showing a hot water discharge body used in the hot water storage type water heater of FIG. 1. 1; hot water storage tank, 3; heat exchanger, 5; hot water discharge body, 7; support member, 8; attachment part, 10; hot water discharge pipe, 12; discharge port, 15; thermally responsive member, 17; hot water conduit, 20 ; Water supply pipe.

Claims (1)

[Scope of utility model registration request] A hot water storage type water heating device including a hot water storage tank for storing hot water, a water supply pipe having an outlet near the inner bottom surface of the hot water storage tank, and a hot water supply pipe for supplying hot water connected to the upper part of the hot water storage tank. a hot water conduit with one end connected to the lower part of the hot water storage tank; a heat exchanger provided in the hot water conduit; a hot water discharge pipe connected to the other end of the hot water conduit and having a discharge port in the hot water storage tank; a thermally responsive member located in an intermediate level layer in the hot water storage tank that expands and contracts according to temperature; the hot water discharge pipe is movable in a direction to vertically move the position of the discharge port; A hot water storage type water heater, characterized in that the hot water discharge pipe is driven by expansion and contraction of a member.