JPH0311260A - Storage type hot water supplier - Google Patents

Abstract

PURPOSE:To prevent no-water burning of a heater and also the damage of the heater and a storage type hot water supplier by a method wherein the respective values of the flow amount for feedwater and drain for a hot water storage tank are detected by flow rate sensors and ON-OFF of a heater is controlled after judgement whether the tank is fully filled with water or not. CONSTITUTION:From the condition that there is no water in a hot water storage tank 1 a drain valve 9 is closed and a feedwater valve 8 is opened to feed water into the tank 1 and fill fully the tank 1 with water. After controller 7 confirms that the tank 1 is fully filled with water on the basis of the values of the flow amount obtained by flow rate sensors 5, 6, ON of a heater is carried out to heat water. However, when the valve 9 is opened and drainage is detected by the sensor 6 and the tank 1 is not fully filled with water, the controller 7 does not carry out ON of the heater 2 not to heat water.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot water storage system that detects the presence or absence of water in the hot water storage tank of a hot water storage type water heater that is widely used for home use, and prevents the heater from running dry. This relates to water heaters.

BACKGROUND OF THE INVENTION In recent years, storage type water heaters with heaters have been widely used.

Figure 2 shows a conventional hot water storage type water heater.

In FIG. 2, 1 is a hot water storage tank, 2 is a heater, 3 is a water supply port, 4 is a drain port, 8 is a water supply tap, and 9 is a drain plug.

The operation of the hot water storage type water heater configured as described above will be described below.

First, open the water tap 8 and pass the water into the hot water tank 1 through the water inlet 3.
Supply water to fill it up. Then, the heater 2 is turned on to heat the water in the hot water storage tank 1. Also, if it is not used for a long period of time, open the drain valve and drain all the water in the hot water tank.

Problems to be Solved by the Invention However, with the above configuration, if the water supply tap 8 is closed and water is not being supplied, or if the drain valve 9 is forgotten to be closed and the water is drained, and the hot water storage tank 1 is not full of water, In this case, when the heater 2 is turned on and heated, the heater 2 becomes dry, leading to damage to the heater 2 and the hot water storage type water heater.

Means for Solving the Problems In order to solve the above problems, the hot water storage type fIj device of the present invention includes a heater, a hot water storage tank, a water supply port provided in the hot water storage tank, and a drain port provided in the hot water storage tank. The system is equipped with a flow rate sensor attached to each of the water supply port and the drain port, and a control device that controls the heater based on the flow rate value obtained by the flow rate sensor.

Operation The hot water storage type water heater of the present invention has the above-described configuration, and detects the respective flow rates of water supply and drainage to the hot water storage tank using a flow rate sensor, determines whether the hot water storage tank 1 is full of water, and turns the heater on and off. Because of the control, it is possible to prevent the heater from running dry, and as a result, the heater and hot water storage type water heater can be prevented from being damaged.

EXAMPLE Hereinafter, a hot water storage type water heater according to an example of the present invention will be described with reference to the drawings. FIG. 1 is a diagram schematically showing a hot water storage type water heater equipped with a control device that controls a heater using the flow rate sensor of the present invention. In this Figure 1, 5
is a flow rate sensor attached to the water supply port 3, 6 is a flow rate sensor attached to the drain port 4, and 7 is a flow rate sensor 5
．． This is a control device that controls the heater 2 based on the respective flow rate values obtained by 6. Note that other parts are the same as those shown in FIG. 2 for the conventional example, so their explanation will be omitted.

Regarding the hot water storage type water heater configured as above, the following is as follows.
Its operation will be explained using FIG. First, when there is no water in the hot water storage tank 1, the drain valve 9 is closed, the water supply valve 8 is opened, and water is supplied to the hot water storage tank 1, so that the hot water storage tank 1 is filled with water. Then, based on the flow rate value obtained by the flow rate sensor 5.6, the control device 7 confirms that the hot water storage tank 1 is full of water, and then turns on the heater to heat it.

However, when the drain valve 9 is open and the flow rate sensor 6 detects that water is being drained, and the hot water storage tank 1 is not full of water, the control device 7 does not turn on the heater 2 and does not heat the water.

As described above, by providing the flow rate sensors attached to the water supply inlet and the drain outlet respectively, and the control device that controls the heater based on the flow rate value obtained by the flow rate sensor, the temperature inside the hot water storage tank 1 can be increased. Detects the presence of water,
Since the ON/OFF of the heater is controlled 2B, it is possible to prevent the heater from running dry and prevent damage to the heater and storage type water heater.
can be prevented.

In the above embodiment, when the FJ1 faucet 9 is closed and the hot water in the hot water storage tank l is dispensed, the value of the amount of hot water dispensed is detected by the flow rate sensor 5 attached to the water supply port 3, and the value of the amount of hot water dispensed from the hot water storage tank l is You can also display the amount of hot water remaining in the tank.

Effects of the Invention As described above, according to the present invention, a heater, a hot water storage tank, a water supply port provided in the hot water storage tank, a drain port provided in the hot water storage tank, and each of the water supply port and the drain port are provided. and a control device that controls the heater based on the flow rate value obtained by the flow rate sensor, the control device detects the presence or absence of water in the hot water storage tank and Since the heater is turned ON and OFF, it is possible to prevent the heater from drying out, thereby preventing damage to the heater and the hot water storage type water heater.

Also, you can know the amount of hot water remaining in the hot water storage tank and use the hot water economically.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a hot water storage type water heater according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of a conventional hot water storage type water heater. 1... Hot water storage tank, 2... Heater, 3
...Water inlet, 4...Drain port, 5...
...Flow rate sensor attached to the water inlet, 6...
...Flow rate sensor attached to the drain, 7...
... Control j1N device, 8... Water tap, 9...
...Drain plug.

Claims (1)

[Claims] A heater, a hot water storage tank, a water supply port provided in the hot water storage tank, a drain port provided in the hot water storage tank, a flow rate sensor attached to each of the water supply port and the drain port, and the flow rate sensor. A storage type water heater comprising a control device that controls a heater based on a flow rate value.