JPS61134539A - Method for controlling bath heater with hot water feeder - Google Patents

Abstract

PURPOSE:To prevent remained water from being generated in a separator tank and a valve by a method wherein when the amount of hot water fed is reached to the desired value, a water closing valve is closed and after a specified time is elapsed, either a three-way valve or a flow path change-over valve is changed over. CONSTITUTION:When an amount of automatic fed hot water is reached to the desired value and this is sensed by the accumulated value of the water amount sensor 5, at first the water closing valve 6 is closed and the combustion at the hot water feeder is terminated and the supplying of hot water to the separation tank 8 is terminated. Then, the hot water subsequent to the tank 8 is supplied to the bath tub 19 by the pump 12. When the water flow switch 15 arranged at the discharging side of the pump 12 is turned off, either the three-way change-over valve 11 or the flow passage change-over valve 41 at its A side is closed and the sides B and C are changed over to each other. Even after the supplying of hot water to the tank 8 is terminated, until the switch 15 at the discharging side of the pump 12 is turned off, the sides A and C are communicated to each other and the pump 12 is continued to operate,so that the hot water subsequent to the tank 8 is supplied to the bath tub 19 and the remained water is not generated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automatic hot water supply control method for a bath pot with a water heater that has a function of automatically supplying hot water to a bath.

[Conventional technology]

Fig. 4.5 shows a diagram of the operating principle of a bath pot with a water heater having an automatic bath water supply function, which is the object of control of the present invention. The following explanation will be mainly based on FIG. 4, but the same applies to FIG.

This appliance is a so-called two-can, two-channel bathtub with water heater, in which a water heater and a bath pot are each housed in one interior.The water heater basically burns gas as a heat source. It consists of a burner 25 for heating water, and a heat exchanger 4 for hot water supply that uses the combustion heat to heat water.A water control valve 2 is provided on the water supply side of the heat exchanger 4, and a heat exchanger is provided on the outlet side of the heat exchanger 4. At the outlet of the vessel 4, it branches into two pipes: a pipe 7 exclusively for bath automatic hot water supply and a pipe 17 for general hot water supply.
A water flow sensor 5 and a water shutoff valve 6 are provided in the bath automatic hot water supply pipe 7. On the other hand, the bath pot is basically composed of a burner 26, a rear-end heat exchanger 14, and a pump 12 for forcibly circulating the hot water in the bathtub 19.

Furthermore, this appliance has an automatic hot water supply function for baths, and a separation tank 8 with a ratio structure is installed by cutting the edge of #/c on the downstream side of the pipe 7 exclusively for automatic bath water supply, and the outlet of the separation tank 8 is for circulation. n7 provided on the suction side of the pump 12 inserted in the middle of the piping 16
2: Connected to one connection port of the three-way switching valve 11.

A control circuit 37 for controlling combustion, automatic bath water supply, etc. is provided in the main appliance, and is electrically connected to a remote control 38 for remote control.

The above is the basic configuration of a bath pot with a water heater that has an automatic bath water supply function.

Next, the operation of the controller will be explained below.

First of all, the place to use it as a normal water heater is as follows.

A hot water supply command is issued with the remote control 38, and the faucet at each hot water supply location is opened.When water flows into the hot water supply side waterway, the hot water supply gas main valve 22 opens and the gas proportional valve 23 adjusts the amount to an appropriate level, and the NFC gas is pumped into the gas tank. It burns at ~S25. The supplied water passes through a water control valve 2 and a water flow sensor 3, is heated by a hot water supply heat exchanger 4, passes through a general hot water supply pipe 17, and is discharged from each hot water tap.

Next, in the case of automatic bath water supply, in this case, when a command for automatic bath water supply is issued using the remote control 38, the n'fc water stop valve 6 provided in the pipe 7 exclusively for automatic bath hot water supply opens. When water flows into the hot water supply side waterway, combustion on the hot water supply side starts as in the above-mentioned normal hot water supply, and hot water is supplied into the separation tank 8. On the other hand, the three-way switching valve 11 provided in the rear-end collision circulation piping 16 is closed before the water shut-off valve 6 opens, and the hot water supplied to the separation tank 8 is closed. teeth,
1. The water is supplied to the bathtub 19 by the pump 12 along the route indicated by the arrow shown in FIG. 4, and the bathtub 19 is tensioned.

Finally, when using the bathtub as a normal bathtub, in this case as well, when a command is issued to the remote control 38 to rearrange the L bathtub, the three-way switching valve 11 opens on the A side, and opens on the B and C sides, and the pump 12 activates the bathtub for 19 yen. The hot water starts to circulate, and the rear-end gas main valve 2 is turned on.
4 opens and the burner 26 on the rear impact side starts combustion. bathtub 1
While the hot water in the bathtub 9 is being circulated by the pump 121C, it is heated by the rear-end heat exchanger 14, and the hot water in the bathtub 19 is boiled.

The structure and operation of the bathtub with water heater have been explained above based on the operating principle diagram shown in Fig. 4, but the same applies to Fig. 5, and here @ we will explain the flow path switching during automatic bath water supply and when the bath is rear-ended. In FIG. 4, the three-way switching valve 11 is used, whereas the two flow path switching valves 41 and 42 are used.

The method of controlling the start and end of automatic bath water supply in a bathtub pot with a water heater having the above-mentioned operating principle will be described in more detail with reference to FIG. In FIG. 6, the control method at the start of automatic hot water supply and during automatic hot water supply is omitted, but the following steps are carried out for automatic hot water supply. When an automatic bath water supply command is issued by operating the remote control 68, first, the three-way switching valve 11 is connected to the A and C sides in FIG. 4, and the N and B sides are closed. Note that this operation has already been performed in A, (Jll) before the operation of the remote controller 38.
It is omitted in cases where n is connected. Next, water shutoff valve 6
opens, the water heater burner 25 starts combustion, and hot water at an appropriate temperature is supplied into the separation tank 8. Furthermore, the pump 12 starts operating, and the hot water in the separation tank 8 is heated and circulated through the piping 13. automatic hot water supply to the bathtub 19 is started using the section. After that,
The water control valve 2 is driven so that the water level in the separation tank 8 is constant, and the amount of water flowing into the separation tank 8 is adjusted. Specifically, the water control valve is automatically activated based on the signal from the 2-L water level sensor 5 installed in the bath automatic hot water supply pipe 7 and the signal from the 7'Lfc water level sensor 9.10 installed in the separation tank 8. 2, the inflow into the separation tank 8 is determined by the outflow from the separation tank 8 (the amount of hot water supplied to the bathtub 19 by the pump 12) VC
Control so that they are equal.

On the other hand, the water flow sensor 5 integrates the flow rate passing through the bathtub automatic hot water supply pipe 7, and when this integrated value reaches the set amount of automatic hot water supply to the bathtub 19, the water stop valve 6 is automatically closed and combustion is stopped. At the same time, the three-way switching valve 11 is opened and closed on the A side, B, and C.
Switch to side communication. After that, 12 pumps are stopped and the bath automatic hot water supply ends.

[Problem that the invention seeks to solve]

The conventional control method shown in FIG. 3 has the following problem when automatic bath water supply is stopped. That is, when it is detected that the bath automatic hot water supply amount has reached the set value, the water shutoff valve 6 closes and the three-way switching valve 11 switches the A side to close and the B and C sides to communicate, so that the separation tank 8 and Separation tank 8
Hot water remains between the three-way switching valve 110 and the three-way switching valve 110. If this happens, automatic hot water supply for baths will become impossible due to freezing in the winter, and in the worst case scenario, equipment will be damaged. Further, the hot water remaining in the separation tank 8 tends to cause water scale and the like to adhere to the water level sensors 9 and 10, causing the water level sensors 9 and 100 to malfunction. Moreover, this remaining fcflh is not used in any way in terms of energy and is a wasteful neighbor.

[Ninth way to solve the problem]

A comparative control method of the present invention that solves the above problems is shown in FIG. In this control method, when it is detected that the bath automatic hot water supply amount has reached the set value, first, the water stop valve 6 is closed and combustion is stopped. In some cases, the separation tank 8 and the three-way switching valve 11 or fc are switched from the separation tank 8 to the flow path switching valve 41 after a certain period of time when hot water does not remain between them. It is set to switch to "closed" J, B, and C sides "open".

[Effect]

If the control method according to the present invention is used, the flow path will not be switched and the pump 12 will not operate even after the water stop valve 6 closes and the supply of hot water to the separation tank 8 is stopped when the bath automatic hot water supply ends. The three-way switching valve 11-1 also connects the hot water between the flow path switching valve 41 to the pump 12 from the first separation mentor 8 and the separation valve 8 to the three-way switching valve 11.
The water is supplied to the bathtub 19.

〔Example〕

FIG. 2 shows an embodiment of the control method of the present invention.

In this control method, when the integrated value of the water flow sensor 5 is informed that the bath automatic hot water supply amount has reached the set value, the water stop valve 6 is closed to stop combustion on the water heater side, and the separation tank 8 Stop supplying hot water to.

Next, the hot water from the separation tank 8 onwards is transferred to the pump 12 at ℃ bathtub 1.
When the water flow switch 15 provided on the discharge side of the pump 12 is turned off, the A side of the three-way switching valve 11 or the flow path switching valve 41 is closed, and the B and C sides are switched to communication.

In this embodiment, even after the supply of hot water to the separation tank 8 is stopped, the A and C sides are communicated until the water flow switch on the discharge side of the pump 12 is turned off. , i from the separation tank 8 is supplied to the bathtub 19, and no residual water is generated.

In this embodiment, when automatic bath water supply is stopped, the separation tank 8
Although a control method has been shown in which the water flow switch 15 detects when the bath water is running out, the present invention is not limited to this method.When automatic bath water supply is stopped, the water stop valve 6 is first closed, and then This is a control method in which the flow path connecting the separation tank 8 and the pump 12 is closed after a period of time until the remaining hot water is sufficiently drained, and the flow path is switched to connect the rear circulation system.
It's late.

Furthermore, in this embodiment, the present control method is applied to the hot water supply bath pot.
Examples are shown, but the examples are not limited to hot water supply,
A similar control method can be adopted for multifunctional heat source devices such as heating bath pots.

〔Effect of the invention〕

In the conventional control method, when the bath automatic hot water supply was stopped, residual water was generated in the separation tank 8 yen and between the separation tank 8 and the three-way switching valve 110, but with the control method according to the present invention, residual water does not occur and it is economical. Not only this, but also the reliability of the water level sensor can be ensured, and furthermore, there is no need to worry about the automatic bath water supply being disabled next time due to freezing, and the fear of freezing damage.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the control method when automatic bath water supply is stopped according to the present invention, Fig. 2 is a diagram showing the control method according to an embodiment of the present invention, and Fig. 3 is a diagram showing the control method when automatic bath water supply is stopped according to the present invention. Figures 4 and 5, which show the control method, are diagrams of the operating principle of a bathtub with a hot water heater that has an automatic bath water supply function. 1... Bath pot body with water heater, 2... Water control valve, 4...
... Heat exchanger for hot water supply, 6... Water shutoff valve, 7... Pipe for bath automatic hot water supply, 8... Separation tank, 9, 1o...
Water level sensor, 12... Pump, 14... Rear-end heat exchanger, 15... Water flow switch, 19... Bathtub, 37
...control circuit, 38...remote control. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. Install a water control valve (2) on the inlet side of the heat exchanger for hot water supply (4), branch the hot water pipe at the outlet side, use one side as a dedicated bath automatic hot water supply pipe (7), and set the water volume in the middle of this pipe. It is equipped with a sensor (5) and a water shutoff valve (6), and downstream there is a separation tank (8) that is connected to this pipe, and further downstream there is a three-way switching valve (11) or a flow path switching valve. (41) and pump (
In a bath pot with a water heater that is connected to a reheating circulation pipe (13) having a water heater (12) and automatically supplies hot water to a bathtub (19) by a pump (12), after the amount of hot water supplied by the bath automatic hot water supply reaches a set value, After the water stop valve (6) is closed and a certain period of time has elapsed during which no hot water remains between the separation tank (8) and the three-way switching valve (11) or flow path switching valve (41) from the separation tank (8),
A method of controlling a bathtub with a water heater, characterized by switching a three-way switching valve (11) or a flow path switching valve (41).