JPH07122511B2 - Gas water heater - Google Patents

Description

TECHNICAL FIELD The present invention relates to a gas water heater.

2. Description of the Related Art FIG. 2 shows an example of a conventional gas water heater capable of pouring molten metal for suppression. 1 is a gas source valve, 2 is a gas proportional control valve, 3 is a burner, 4 is a heat exchanger. 5 is a water flow switch, 6
Is a bathtub, 7 is a water valve for pouring hot water into the bathtub, 8 is a water amount sensor that detects the amount of hot water poured into the bathtub 6, 9 is a control device that controls this water heater, and 10 is a temperature sensor that detects the hot water temperature. , 22 is a pouring pipe for branching from the outlet pipe of the heat exchanger 4 and pouring the molten metal into the bathtub 6 via the water valve 7, and 23 is a plug pipe for branching from the outlet pipe of the heat exchanger 4 and supplying hot water to another tap. Is. When pouring into the bathtub 6 with this water heater, the pouring amount and pouring temperature are set by the control device 9, and when the pouring start is instructed, the water valve 7 opens and the temperature sensor 10, the control device 9 and Hot water heated to a constant temperature by the gas proportional control valve 2 is poured into the bathtub 6 via the pouring pipe 22. At this time, the water amount sensor 8 calculates the pouring amount into the bath 6, and when the set pouring amount is reached, the water valve 7 is closed and pouring is stopped, so that constant temperature fixed amount pouring into the bath is possible.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-mentioned configuration, in order to keep the pouring temperature constant, it is necessary to discharge the pouring water at the set pouring temperature during pouring. There was a drawback that you had to prohibit the setting of.

The present invention solves such a conventional problem, and an object of the present invention is to provide a water heater that can obtain hot water at an arbitrary set temperature with another plug even during pouring into a bathtub. .

Means for Solving the Problems In order to solve the above problems, the gas water heater of the present invention detects the pouring amount by the water amount sensor, detects the pouring temperature by the temperature sensor, respectively, and always calculates both. Grasp the temperature of the bathtub, and when the pouring temperature changes due to another tap,
The pouring temperature is changed when the other tap is not used so that the set pouring temperature can be obtained at the end of the pouring.

Effect of the InventionThe present invention has the above-described configuration, and even if the hot water supply condition for the bathtub is changed temporarily by using the other hot water while pouring the water into the bathtub, the bathtub temperature at the preset hot water temperature is maintained at the end of the pouring. It is possible to obtain it.

Embodiment An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, 11 is a gas source valve, 12 is a gas proportional control valve, 13 is a burner, 14 is a heat exchanger, 15 is a water amount sensor (1) for detecting the amount of hot water supply, and 16 is an amount of water for detecting the amount of pouring water. Sensors (2), 17 is a bathtub, 18 is a water valve for pouring hot water into the bathtub 17, 19 is a temperature sensor for detecting the hot water supply temperature, 20 is a sequence control circuit for controlling the sequence of the water heater, and 21 is the bathtub 17
A pouring circuit for calculating the pouring amount to the bath and the bath temperature, 22 is branched from the outlet pipe of the heat exchanger 14 and passes through the water valve 16 to the bath
A pouring pipe for pouring the molten metal into 17 and a plug pipe 23 for branching from the outlet pipe of the heat exchanger 14 to supply hot water to another plug. The operation of the gas water heater configured as above will be described below. In the case of hot water supply with the other tap, if the water tap is opened, water flows through the heat exchanger 14 and the other tap pipe 23, and the water amount sensor (1) 15 detects the amount of water and determines a flow rate equal to or higher than the ignition water amount. ,
The gas source valve 11 and the gas proportional control valve 12 open to ignite the burner 13 and heat the water that has entered the heat exchanger 14 to supply hot water. Bath 17
When pouring the molten metal into the bath, first, the pouring amount and the pouring temperature are set in the pouring circuit 21, and when the pouring start is instructed, the water valve 18 opens and the pouring is performed to the bath 17 through the pouring pipe 22. At this time, if the water amount of the water amount sensor (2) 18 and the water amount of the water amount sensor (1) match, it can be determined that the other plug is not used.
The tapping temperature from 14 is controlled to the set pouring temperature. Next, when pouring and using the other tap at the same time, water amount sensor (1) 15
And the water flow sensor (2) 16 have different flow rates. At this time, if the set temperature of the other tap is different from the pouring set temperature, the set temperature of the other tap is given priority, and if the use of the other tap is completed The pouring circuit 21 calculates and operates so as to change the set temperature so that the temperature of the bath 17 becomes the pouring set temperature. Specifically, for example, if the pouring set temperature is 40 ° C, the other tap setting temperature is 50 ° C, and the pouring amount is 5 while the other tap is being used, the time until pouring 5 is completed after the other tap is used. If the pouring temperature is set to 30 ° C, it means that 40 ° C of pouring water has been poured into the bathtub after 10 pourings.

FIG. 3 shows a flow chart during the lubrication in this embodiment, and the explanation thereof will be described below. During pouring, whether or not another plug is being used is monitored by monitoring the flow rate difference between the two water amount sensors. If no other plug is used, correction pouring is not performed and pouring into the bathtub 17 is performed. When the amount of pouring water reaches the set pouring amount, the water valve 18 is closed and pouring is finished. When the other tap is used, the hot water outlet temperature from the heat exchanger 14 is controlled to the set temperature of the other tap, and the hot water outlet temperature of the other tap until the use of the other tap is completed and the pouring amount into the bathtub 17 Remember the relationship. next,
When the use of the other tap is completed, the correction pouring mode is entered, and the deviation of the bath temperature due to the pouring at the temperature set by the other tap is corrected.

When the correction pouring is completed, the hot water outlet temperature of the heat exchanger 14 is controlled to the pouring set temperature, and the same operation is repeated every time another plug is used. Then, when the pouring amount into the bath 17 reaches the set pouring amount, the water valve 18 is closed and the pouring into the bath is completed.

As described above, according to the present embodiment, it is possible to obtain an arbitrary set temperature when using another plug during pouring.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to simultaneously use hot water with a plug other than the bathtub plug while pouring hot water at a set temperature and a set amount of hot water. Regarding the pouring heat amount during the simultaneous hot water supply period, the pouring circuit corrects the calorific value at the end of simultaneous hot water to correct the hot water supply condition to the bathtub, and when the pouring amount of the set hot water amount is reached, the average hot water temperature of the bathtub approximates the set temperature. Even if the hot water is supplied to the bathtub at the same time, the amount of heat to be supplied to the bathtub can be poured more quickly than the method of interrupting the hot water supply to the bathtub at the same time.

[Brief description of drawings]

FIG. 1 is a block diagram of a gas water heater showing an embodiment of the present invention,
FIG. 2 is a configuration diagram of a gas water heater showing a conventional example, and FIG. 3 is a flowchart showing a control operation of the gas water heater of the present invention. 15 …… Water volume sensor (1), 16 …… Water volume sensor (2), 18
…… Water solenoid valve, 19 …… Temperature sensor, 21 …… Pouring circuit.

Claims (1)

[Claims] 1. A gas proportional control valve, a temperature sensor for detecting hot water temperature, a proportional control circuit for controlling and driving the gas proportional control valve according to the hot water temperature detected by the temperature sensor, and a water heater. A sequence control circuit that controls a series of sequences, a water amount sensor that detects the amount of hot water supplied to the bathtub, a water valve for pouring hot water into the bathtub, and a branch of the outlet pipe of the heat exchanger, one of which is the water A pipe for pouring hot water into the bathtub via the valve and a pipe for supplying hot water to the other tap,
When setting and inputting the pouring amount and pouring temperature into the bathtub, when pouring into the bathtub and refueling simultaneously with other plugs, the pouring amount of the pouring amount of the hot water into the bathtub is set while giving priority to the set temperature on the other line. When the water temperature in the bathtub reaches the set pouring temperature, the outlet temperature of the heat exchanger is controlled when the other plug is not used, and the water valve is closed when the set pouring amount is reached. A gas water heater having a pouring circuit.