JPH023898B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a gas instantaneous hot water heater, in particular, the setting contents such as the set temperature set in the setting section of the external controller can be transferred from the external controller to the internal controller. The present invention relates to a gas instantaneous water heater in which the settings are transmitted by binary communication and an in-machine controller controls the operation of the water heater based on the settings.

(Prior Art) Conventionally, in this type of gas instantaneous water heater, an in-machine controller is connected to a power source, and power is supplied from the in-machine controller to an external controller via an operation switch.

Therefore, the controller inside the machine is energized even when the operation switch is OFF, but the controller outside the machine is de-energized when the operation switch is OFF, so all settings are erased, and when the operation switch is turned on next time, the inside and outside of the machine All controllers are initialized and set to a preset initial state regardless of the settings from the last time they were used, and the settings are displayed on the display of the external controller by inputting a switch in the setting section of the external controller. The data is transmitted to the in-machine controller at the same time.

Therefore, when the above-mentioned conventional water heater is turned off, the settings that have been made are erased, and even if you try to use the same settings next time, you will have to set them all over again, which is inconvenient for use. It was hot.

(Problem to be Solved by the Invention) The problem to be solved by the present invention is to retain the setting contents when the operation of the water heater is stopped as the initial state when the water heater is operated next time. .

(Means for Solving the Problems) The technical means taken by the present invention to solve the above problems is to transmit the setting contents in the setting section of the off-board controller to the off-board controller through binary communication. In gas instantaneous water heaters that control the operation of the water heater, the settings transmitted from the external controller are stored in the in-machine controller.
A means for retaining the memory without being reset even when the operation switch is turned on, and a transmitting circuit that transmits the final data held in the means when the operation switch is OFF to a controller outside the machine when the operation switch is turned on are provided. In addition, the off-machine controller is provided with a receiving circuit for receiving the transfer data from the on-machine controller.

(Function) According to the above technical means of the present invention, the setting contents are held in the in-machine controller while the operating switch is turned off, and are transferred to the external controller when the operating switch is turned on. The information is stored again in the controller, and the water heater is controlled based on the content.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

The water heater consists of a water heater main body A that includes an in-machine controller b that controls the combustion relationship of the burner 4, and an external controller a that is provided separately from the water heater main body A. In this embodiment, Main controller a ₁ as off-machine controller a
and a sub-controller _A2 installed in the bathroom where the water heater supplies hot water.

In the water heater body A, gas supplied through gas piping 5 is burned in burner 4, water supplied from a water supply source through water supply pipe 6 is heated in heat exchanger 7, and hot water supply pipe 8 is heated. It is designed to flow to hot water supply appliances 9 such as faucets and showers, and the temperature of the hot water is controlled by the amount of gas supplied to the burner 4 and/or by the ratio of the burning time and extinguishing time by intermittently burning the burner 4. Control.

In addition, the water heater main body A, other than when hot water is being supplied, circulates water through the circulation pipe 11 formed by connecting the middle of the hot water supply pipe 8 and the middle of the water supply pipe 6 with a return pipe 10 to heat it and maintain the set temperature. It is equipped with a thermal operation function that keeps the shower warm, and a cold/hot water shower function that alternately discharges hot and cold water from the shower.

Each function of the water heater main body A is controlled by controlling combustion with an in-machine controller b based on settings made by an external controller a.

The in-machine controller b is connected to a power source, and supplies power to the external controller b via the operation switch 12.

Therefore, the in-machine controller b is always energized, but the external controller a is energized only when the operation switch 12 is turned on, and is turned off when the operation switch 12 is turned off.

The external controller a includes a CPU 13, a transmitting circuit 14, a receiving circuit 3, a display section 15, and a setting section (not shown), and the contents set in the setting section are sent to the CPU 1.
3, the data is displayed on the display unit 15, and the data is transmitted to the in-machine controller b via the transmitting circuit 14 by binary communication.

The in-machine controller b includes a CPU 16, a receiving circuit 17 that electrically communicates with the transmitting circuit 14 of the external controller a, and a transmitting circuit 2 that electrically communicates with the receiving circuit 3 of the external controller a. , the transmission data from the external controller a is taken into the CPU 16 via the receiving circuit 17, and the water supply and hot water supply pipes 6 and 8 have a water flow sensor 18, an inlet water temperature sensor 19, and an outlet water temperature sensor 20.
The transmission data is taken in and processed, and necessary controls such as opening/closing control of the electromagnetic valve 21 in the gas pipe 5, opening control of the proportional valve 22, and drive control of the pump 23 in the circulation pipe 11 are performed.

In addition, CPU1 of the above in-machine controller b
6 is provided with means 1 for retaining memory without being reset even if it has been reset, and sequentially stores data transmitted from the external controller a in this means 1.

Specifically, the memory holding means 1 is on standby.
Consisting of RAM, the in-machine controller b is directly connected to the power supply, and the operation switch 12 is turned on and off.
Since it is always energized regardless of the operation switch 12, the memory is retained without being erased even after the operation switch 12 is turned off.
Even if the CPU 16 is reset by re-inputting the power supply 2, the memory in the standby RAM 1 is not reset and is held. And in-machine controller b
When the operation switch 12 is turned on again, the data stored in the standby RAM 1 without being reset is transferred to the off-machine controller a via the transmission circuit 2.

This transferred data is taken into the CPU 13 of the external controller a via the receiving circuit 3, processed by the CPU 13, displayed on the display section 15, and transmitted to the internal controller b.

Therefore, when the operating switch 12 is turned on again, the water heater main body A returns to the same setting state as the setting state when the operating switch 12 was last turned off.

(Effects) Since the present invention has the above configuration, it has the following advantages.

(1) The final data when the operation switch is turned off, which is stored in the in-machine controller and retained even after the operation switch is turned off, is transferred to the external controller when the operation switch is turned on next time. The setting state when restarting the operation is automatically the same as the setting state when the operation switch was turned off first, so the optimal state once set, such as hot water temperature, warm operation state, set temperature of cold and hot water shower, etc. Strength etc. can be maintained semi-permanently,
It is very convenient to use since there is no need to set the settings again each time the operation is resumed.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of a gas instantaneous water heater showing an embodiment of the present invention, FIG. 2 is a flowchart, and FIG. 3 is a flowchart of a conventional gas instantaneous water heater. a: Controller outside the machine, b: Controller inside the machine, 1: Memory holding means, 2: Transmission circuit of the controller inside the machine, 3: Receiving circuit of the controller outside the machine.

[Claims]

1. Connect the midway part of the hot water supply pipe and the water supply pipe with a return pipe to form a heat-retaining circulation pipe consisting of the water supply pipe, heat exchanger, hot water supply pipe, and return pipe. A flow rate sensor and a temperature sensor are installed at appropriate locations, and a pump is installed in the return line in the circulation line, and the pump is driven by the input of heat retention operation when hot water supply is stopped to circulate water through the circulation line. Based on the flow rate and temperature of the circulating water detected by the temperature sensor and the temperature data transmitted from the remote controller, the calculation means of the in-machine controller calculates the required heat load, and adjusts the heat amount of the burner according to the calculation result. Controls the adjustment amount of the adjustment means,
In a water heater that maintains circulating water at a constant temperature while hot water is not being supplied, a) means for identifying whether predetermined terminals in the remote controller are short-circuited; b) selection when the above-mentioned terminals are short-circuited. means for transmitting a fixed predetermined temperature as temperature data to the calculation means regardless of the temperature set in the temperature setting section of the remote controller;