JPH0560333A - Control device for hot water heater - Google Patents

Abstract

PURPOSE:To prevent an excessive rise in room temperature on the terminal equipment side whose setting temperature is lower when controlling the hot water of two and over terminal equipment by means of a single heater. CONSTITUTION:Heat-driven valves 23 and 24 are installed to circuits leading to terminal equipment A and B respectively. The heat-driven valves are related with a controller 22 of a heater 1. Hot water temperature is controlled based on the terminal equipment whose setting temperature is higher whereas the terminal equipment whose setting temperature is lower is arranged to stabilize room temperature by on/off controlling the hot water-driven valve of the hot water circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a controller for a hot water heater that heats multiple rooms with one heat source unit.

[0002]

2. Description of the Related Art In a conventional hot water heater, even if a plurality of radiators are used to heat multiple rooms for one heat source device, only one hot water control is required for the heat source device. There are systems that can control two temperatures, but the configuration of the hot water circuit is complicated and uncommon.

[0003]

When the hot water control of two or more radiators by one heat source machine is one temperature control, even if there is a radiator with a low hot water temperature setting, the radiator will not be set more than the set temperature. There is a problem that the room temperature rises more than necessary due to the supply of hot water at the temperature.

According to the present invention, when hot water control of two or more radiators or the like for one heat source machine is performed, the hot water circuit of the terminal having a low set temperature is controlled to open and close before the room temperature rises. It is an object of the present invention to provide a controller for a hot water heater that stabilizes the temperature.

[0005]

In order to achieve the above object, the present invention has the following constitution.

That is, in a system in which one heat source device controls hot water of two or more terminals, a heat valve is provided in a hot water circuit to each terminal device, and the heat valve is provided in the controller of the heat source device. Relatedly, the terminal side with the higher set temperature controls hot water, and the terminal side with the lower set temperature controls the opening / closing of the thermal valve of the hot water circuit. ..

[0007]

When two or more terminals are used at the same time by one heat source, the heat source is operated by the signal from the terminal with the higher one of the set temperatures to control hot water and the other set temperature. The terminal with the lower temperature will stop the warm water by closing the thermal valve provided in the hot water circuit in response to the rise in the temperature of the hot water due to the signal from the terminal with the higher set temperature, and prevent the room temperature from rising. .. Then, when the room temperature is lowered and a signal for raising the hot water temperature is input, the thermal valve is opened to circulate the hot water. in this way,
On the side of the terminal having the lower preset temperature, the temperature of the room near the preset temperature can be maintained and stabilized by controlling the opening / closing of the thermal valve based on the room temperature.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention. In FIG. 1, reference numeral 1 is a heat source machine equipped with a heat exchanger 2 and a gas burner 3, and a hot water outlet pipe 4 connected to the heat exchanger 2. A plurality of terminals A having water inlet pipes 5 installed in each room,
The forward pipes 6 and 7 and the return pipes 8 and 9 connected to B are connected via the pipe connection portions 10 and 11, and a hot water circuit is formed to circulate the hot water heated by the heat exchanger 2 by the circulation pump 12. To heat each room. 13 is a temperature sensor for detecting hot water temperature,
14 is an expansion tank, 15 is a water supply pipe, 16 is a gas supply pipe,
Reference numeral 17 is a gas solenoid valve, 18 is a gas proportional valve, and 19 is a fan. Reference numeral 20 is an indoor remote controller for terminal A, 21 is an indoor remote controller for terminal B, and 22 is a controller for the heat source device 1. Hot water control is performed in association with each indoor remote controller 20, 21, and room temperature control is performed at a set temperature. To do. Outflow pipe 6 for hot water circuit
The thermal valve 23 for the terminal A is installed in the
A thermal valve 24 for use is provided, and the hot water circuit of the controller 22 is controlled to open and close in association with the controller 22.

When the operation switch of the controller 22 is turned on, the heat source unit 1 is operated by first detecting the water level by the water level electrode attached to the expansion tank 14 and checking the water level.
The circulation pump 12 is driven. Next, the temperature sensor 13 detects that the temperature of the hot water is below the ignition temperature, and the fan 1
9 and an igniter (not shown) are turned on, the gas solenoid valve 17 and the gas proportional valve 18 are turned on to ignite the gas burner 3. After ignition, the flame rod (not shown) detects the combustion state, the igniter is turned off, the combustion is indicated by an indicator light, etc., the steady combustion is performed by the gas proportional control, and the hot water of the set temperature detected by the temperature sensor 13 is detected. Take control. When the operation switch is turned off when the operation is stopped, the gas solenoid valve 1
7, the gas proportional valve 18, the fan 19, the circulation pump 12, etc. are turned off, and the operation of the heat source device 1 is stopped.

Next, the control operation when used alone will be described with reference to the flow chart shown in FIG.

The heat source unit 1 that has started operation is
At 1, the room temperature is detected by the room temperature sensor attached to the indoor remote controller, and at step 102, the hot water temperature is determined based on the difference between the room temperature and the set temperature, and combustion control is performed. Next, in step 103, it is judged whether or not the room temperature has risen to the set temperature, and if it reaches the predetermined temperature, when the terminal A is used, the process proceeds to step 104, the thermal valve 23 is closed, and the hot water supply is stopped. .. Next, when it is detected in step 105 that the room temperature has dropped below the set temperature, the process proceeds to step 106, the thermal valve 23 is opened, hot water circulation is restarted, and the room temperature is controlled to the set temperature.

Next, the control operation in the case of simultaneous use will be described with reference to the flow chart shown in FIG.

In step 111, the hot water temperature is determined by the terminal A, and the hot water is burned and controlled to the set temperature. During the combustion control of this terminal A, in step 112, another terminal B
If the operation switch is turned on, the heat source device 1 is operated by the signal having the higher hot water set temperature in step 113, and the thermal valve on the terminal side having the lower set temperature is closed in step 114. When the room temperature on the lower terminal side is lowered by this operation, a signal for raising the hot water temperature is input in step 115, and based on this signal, the thermal valve is opened to restart hot water circulation. When the room temperature rises and exceeds the set temperature in step 116, this is detected and the lower thermal valve is closed. Then, the room temperature is stabilized by controlling the opening / closing of the thermal valve and controlling the hot water on the lower terminal side.

As described above, when one terminal device A is used for other than that terminal, for example, when the set temperature of the terminal device B is high, the heat source device 1 is sent by the signal of the higher set temperature.
When the hot water temperature rises, first close the thermal valve 23 on the terminal A side of the lower set temperature, stop the hot water to prevent the room temperature from rising, and the room temperature falls below the predetermined temperature. The thermal valve 23 is opened by the signal that raises the hot water temperature,
The room temperature is controlled to be constant.

In the above embodiment, the two terminals A and B are used, but the present invention is also applicable to the case of using three or more terminals.

[0016]

As described above, according to the present invention, when a single heat source unit is used in multiple loads such as multi-room heating, a heat valve is provided in each of the hot water circuits of a plurality of terminals so that one having a lower set temperature can be used. Since the terminal side of the device controls the opening / closing of the thermal valve, the hot water does not circulate to the terminal with the lower set temperature even if the hot water temperature rises. Can be prevented and the room temperature can be stabilized at the set temperature.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a control operation when used alone.

FIG. 3 is a flowchart showing a control operation at the time of simultaneous use.

[Explanation of symbols]

 1 Heat Source Machine 6 Forward Pipe 7 Forward Pipe 8 Return Pipe 9 Return Pipe 20 Indoor Remote Control 21 Indoor Remote Control 22 Controller 23 Thermal Valve 24 Thermal Valve A Terminal B Terminal

Claims (1)

[Claims] 1. In one hot source device for controlling hot water of two or more terminals, a hot water valve is provided in a hot water circuit to each terminal device, and the heat valve is used as a controller of the heat source device. Relatedly, the hot water heater is characterized in that the hot water is controlled by the terminal side having the higher set temperature, and the heat valve of the hot water circuit is opened and closed by the terminal side having the lower set temperature. Control device.