JPS6266051A - Gas hot water supplier - Google Patents

Abstract

PURPOSE:To make it possible to accurately control the amount of hot water supplied to a bathtub with a single water amount sensor by allowing a water amount sensor to detect hot water supply at other taps as well, computing the amount of hot water to be supplied to a bathtub based upon the timing of opening a water valve and the change in water amount caused by other taps, and stopping the hot water supply when the amount of hot water supplied reaches a preset amount. CONSTITUTION:When a water tap is opened, the amount of water passing through a heat exchanger 13 is detected by a water amount sensor 14. When a sequence control circuit 17 identifies the flow amount larger than the ignition water amount by means of the signal from the water amount sensor 14, a main gas valve 10 and a gas proportional control valve 11 are opened, and a burner 12 is ignited and water entering the heat exchanger 13 is heated and hot water is supplied. In a case where the hot water supply to a bathtub 15 is made independently, the hot water supply amount can be determined only by a simple computation of the water amount sensor 14. However, the case of using the water tap with other tap 19, the water amount is sampled at every predetermined time interval to detect the change in the flow amount. For example, prior to opening a water valve 16 if the water amount sensor 14 does not detect the water amount, the water amount detected at a time point where the water valve 16 was opened is an amount of hot water to be supplied to the bathtub 15. With respect to the thus obtained amount of hot water to be supplied, a set water supply amount is obtained based on the time control.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a gas water heater.

BACKGROUND OF THE INVENTION FIG. 2 shows an example of a conventional gas water heater that can pour hot water into a bathtub.

1 is a gas main valve, 2 is a gas proportional control valve, 3 is a burner, 4 is a heat exchanger, 5 is a water flow switch 56 is a bathtub, 7 is a water valve for pouring hot water into the bathtub 6, 8 is a water valve for pouring hot water into the bathtub 6 A water amount sensor 9 detects the amount of poured hot water, and 9 is a control device that controls the water heater. When pouring hot water into the bathtub 6 using this water heater, the amount of hot water to be poured is set by the control device 9, and when pouring starts, the water valve 7 opens and the water flow switch 5 detects that water is flowing. A signal is sent to the control device 9, which opens the gas main valve 1 and the gas proportional control valve 2, burns the burner 3, and heats the heat exchanger 4. Then, the heated hot water is poured into the bathtub 6 through the heat exchanger 4. At this time, the water amount sensor 8 measures the amount of hot water poured into the bathtub 6, and when the set amount of hot water is reached, the pouring of hot water is stopped, thereby making it possible to pour hot water into the bathtub 6.

Problems to be Solved by the Invention However, in the above configuration, a dedicated water flow sensor 8 is required to accurately measure the amount of poured metal, and two sensors, the water flow switch 5 and the water flow sensor 8, are used as sensors for detecting water flow. The disadvantage was that it required

The present invention solves these conventional problems and aims to provide a water heater that can accurately pour hot water into a bathtub using a single water flow sensor.

A foolproof way to solve problems In order to solve the above problems, the water heater of the present invention is provided.

The water flow sensor also detects hot water being supplied from other taps, and the amount of hot water poured into the bathtub is calculated based on the timing when the water valve is opened and the changes in water volume from other taps, and stops pouring when the set amount is reached. It was made so that it could be done.

Effects of the present invention With the above-described configuration, it is possible to accurately manage the amount of hot water poured into the bathtub using a single water amount sensor.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIG.

In FIG. 1, 10 is a gas source valve, 11 is a gas proportional control valve, 12 is a burner, 13 is a heat exchanger, 14 is a water flow sensor that detects the amount of hot water supplied, and 15 is a bathtub.

16 is a water valve for pouring hot water into the bathtub 15; 17 is a sequence control circuit that controls and drives a gas proportional control valve according to the temperature of hot water and controls the sequence of the water heater;
18 is a hot water pouring circuit that calculates the amount of hot water poured into the bathtub 15.

Reference numeral 19 is a tap for other purposes such as a kitchen.

The operation of the gas water heater configured as described above will be described below. In the case of hot water supply using another faucet 20, when the faucet is opened, water flows through the heat exchanger 13, and the water amount sensor 14 detects the amount of water. Based on this signal, the sequence control circuit 17
If it is determined that the flow rate is greater than the ignition water amount, the control device 17 opens the gas main valve 10 and the gas proportional control valve 11 to ignite the burner 12, heat the water entering the heat exchanger 13, and supply hot water from another tap 2o. do.

In addition, when pouring hot water into the bathtub 15, first set the amount of hot water poured into the hot water pouring circuit 1 day, and when pouring starts, the burner 12 burns and hot water is obtained in the same way as the other tap 190, and the hot water is poured into the bathtub 15. The valve 16 opens and hot water is poured into the bathtub 15. At this time, heat exchanger 1
3 is measured by a water amount sensor 14, and when the water amount reaches a set amount, the water pouring circuit operates so that the water valve 16 is closed.

When pouring hot water into the bathtub 15 alone, the amount of hot water poured can be determined by simply measuring the amount of water using the water sensor 14, but when using the bathtub 15 at the same time, the amount of hot water poured can be determined by simple metering. is the set pouring amount). In order to set the pouring amount accurately, the water amount is sampled at fixed short time intervals and changes in the flow rate are detected. For example, if the water amount sensor 14 does not detect the water amount before the water valve 16 opens, The amount of water detected when the water valve 16 opens is the amount of hot water poured into the bathtub 15, and the set amount of hot water can be obtained by time management for that amount of hot water. Also, if a certain amount of water is flowing from other taps 19 before the water valve 16 opens, the water valve 16
The amount of water increased at the time when the bathtub 15 is opened is the amount of hot water poured into the bathtub 15, and the set amount of hot water can be obtained by time management. Furthermore, even if other taps are opened at the same time as pouring water into the bathtub 15, simultaneous use can be determined by detecting a flow rate greater than the maximum amount of hot water due to the characteristics of the water heater, and long-term use of other taps is It is possible to judge the pouring amount based on the decrease in the amount of water, which is very small.

As described above, according to this embodiment, it is possible to accurately manage the amount of hot water poured into the bathtub and to detect the opening and closing of other faucets using a single water amount sensor.

Effects of the Invention As described above, according to the present invention, it is possible to accurately pour hot water into a bathtub using one water flow sensor, without using two sensors for water flow detection and water flow detection as in the prior art.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a gas water heater showing an embodiment of the present invention;
FIG. 2 is a configuration diagram of a conventional gas water heater. 14...Water flow sensor, 16...Water valve, 18...Pouring circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure I1--Cast proportional control valve 12-Burner I3--Heat exchanger I4-11 Water quantity sensor I5--Immersion seed 16-°-Blade ← Lube Figure 2

Claims (1)

[Claims] A gas proportional control valve, a sequence control circuit that controls the gas proportional control valve according to the hot water temperature and also controls a series of water heater sequences, a water flow sensor that detects the amount of hot water supplied, and a water flow sensor for pouring hot water into the bathtub. A gas water heater characterized by being equipped with a water valve that performs this and a hot water pouring circuit that calculates the amount of hot water poured into a bathtub.