JPH0468226A - Hot water heater device - Google Patents

Abstract

PURPOSE:To release positively a trial operation mode when water feeding for a heating water circuit is completed even if releasing of the trial operation mode is not performed by a method wherein a trial operation switch is turned on to start the operation, a circulation pump is stopped and an automatic water supplementing valve is closed after elapsing a predetermined time and a timer for releasing the trial operation mode is provided. CONSTITUTION:When a trial operation switch is turned on, a trial operation mode is set, an automatic supplementary water valve 7 is opened to start an automatic water supplementing operation and then a timer starts. Within a predetermined time set at the timer, a water level switch 6 detects that a water level in an expansion tank 4 is set at a predetermined low water level and the switch is turned on, the operation of a circulation pump 5 is started, water is supplied into a heating water circuit so as to perform a feeding of water. When water is filled in the heating water circuit, the water level in the expansion tank 4 is also increased, so that it detects that the water level is at a predetermined high water level and then the switch is turned off, resulting in that the operation of the circulation pump 5 is stopped. As the predetermined time elapses, the timer stops the operation of the circulation pump 5 to close the automatic water supplementing valve 7, an automatic water supplementing operation is stopped and then the trial operation mode is released.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hot water heater that circulates hot water between a water heater and an indoor radiator.

[Prior art] Generally used hot water heaters supply hot water heated by a water heater to an indoor radiator to heat the room, and then return the hot water after heat radiation to the water heater for heating purposes. It is necessary to fill the heating water circuit with water beforehand.

Conventionally, in order to fill the heating water circuit with water, a trial run mode was set in which only the circulation pump of the heating water circuit was operated and the water heater was not combusted. Water was being filled.

In this test run mode (see Figure 3), when the test run switch is turned on, a water level detection switch such as a float sinch, which detects the presence of water in the expansion tank installed in the heating water circuit, is turned on and the water is circulated. The pump is started.

At this time, no fuel is supplied to the combustor of the water heater and no combustion occurs.

When the heating water circuit becomes full of water, the water level in the expansion tank rises, the water level detection switch is turned off, and the Wi ring pump is stopped.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional test run mode, it takes time to fill the heating water circuit with water, and especially when the construction is carried out in an apartment complex, etc. Because construction work is carried out at the same time, it is often necessary to fill water in multiple heating water circuits at the same time, and people often forget to turn off the test run switch and release the test run mode, leaving the test run switch on. There was a problem in that it was sometimes left unattended.

If you do not cancel the trial run mode, the water supply will not be stopped.
This may cause problems such as the risk of overflowing the make-up water.

An object of the present invention is to solve the above-mentioned problems and provide a hot water layer N machine that can reliably cancel the trial run mode when the heating water circuit is filled with water even if the user forgets to cancel the trial run mode. It is to be.

(Means for Solving the Problems) In order to achieve the above object, the hot water heater of the present invention starts by turning on a test run switch in a test run mode in which the heating water circuit is filled with water, and after a predetermined period of time has passed, the hot water heater starts circulating water. It is equipped with a timer that stops the pump, closes the automatic make-up water valve, and cancels the test run mode.

[Effect]

In the hot water heater of the present invention configured as described above, when the trial run switch is turned on to start the trial run mode for filling the heating water circuit with water, the automatic replenishment water valve opens and automatic water replenishment starts. The vIi ring pump is started to start filling the heating water circuit with water, and at the same time, a timer is started.

When a predetermined period of time has elapsed after starting the timer, the circulation pump is stopped and the automatic make-up water valve is closed, thereby canceling the test run mode.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

In FIG. 2, a hot water heater to which the present invention is applied is explained. The water heater 1 includes a heat exchanger 10, a burner 11 arranged below the heat exchanger 10, and a control valve I2 that controls the amount of fuel gas to the burner 11. , and a combustion fan 13.

An outgoing pipe 21 is connected to the hot water outlet of the heat exchanger IO, and the outgoing pipe 21 is branched into a plurality of branch pipes 31.31 via the first header 30, and the branch pipes 31.31 are connected to the indoor radiator. 3.3 is connected to the inlet side of the heat radiation heat exchanger 32.32.

In the heat radiation heat exchanger 32.32, the heat radiation fan 33
．． After heating the air supplied by 33, the low-temperature water is collected from branch pipes 34, 34 into the second header 35, and returns to the return pipe 2.
2 to an expansion tank 4.

The low temperature water in the expansion tank 4 is sent from the water inlet pipe 23 to the low temperature water side inlet of the heat exchanger 10 of the water heater 1 by the circulation pump 5 provided in the water inlet pipe 23 .

A make-up water pipe 24 and an overflow pipe 41 are connected to the expansion tank 4, and an automatic make-up water valve 7 is provided between the make-up water pipe 24.

Further, a water level detection switch 6 is disposed within the expansion tank 4, and the water level detection switch 6 is composed of electrodes for high water level (H), medium water level (M), and low water level (L). .

Next, a trial run mode in which the heating water circuit is filled with water before the start of heating operation will be explained based on the flowchart of FIG. 1.

When the test run switch is turned on, the test run mode is entered, and the automatic replenishment water valve 7 opens to start automatic water replenishment.
A timer installed in a controller (not shown) or the like starts.

The water level detection switch 6 indicates that the water level in the expansion tank 4 is at a predetermined low water level (for example, the water level between the low water level and the middle water level M, or the low water level, etc.) within a predetermined time period preset on the timer. When detected and turned on, the circulation pump 5 starts operating, and water is supplied to the heating water circuit to fill it with water.

When the heating water circuit is filled with water, the water level in the expansion tank 4 also rises, so it can be determined that the water level is at a predetermined high water level (for example, the water level between the medium water level M and the high water level H, or the high water level H, etc.). When detected and turned off, the operation of the circulation pump 5 is stopped (
commissioning mode continues).

When a preset predetermined period of time has elapsed, the timer stops the operation of the circulation pump 5, closes the automatic replenishment water valve 7 to stop automatic replenishment of water, and cancels the test run mode.

With the above configuration, even if it takes a long time to fill with water while operating in the test run mode and you forget to cancel the test run mode, the test run mode is automatically canceled after a predetermined period of time, so the circulation pump 5 finishes filling the water. This can prevent troubles such as continuing operation after the expansion tank 4 or overflowing of the water replenished into the expansion tank 4.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

Even if it takes a long time to fill water in the heating water circuit during operation in trial run mode and you forget to cancel the trial run mode, the trial run mode will be automatically canceled after a predetermined period of time, so the circulation pump will continue to work. This prevents troubles such as continuing operation even after filling with water or overflowing of automatically replenished water.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the operation of an embodiment of the present invention;
FIG. 2 is a schematic configuration diagram of a heating water circuit to which the present invention is applied, and FIG. 3 is a flow chart showing the operation of a conventional hot water heater. 1...Water heater, 3...Indoor radiator, 4...Expansion tank, 5...Circulation pump, 6...Water level detection switch, 7...Automatic make-up water valve.

Claims (1)

[Claims] (1) In the test run mode of the heating water circuit, the test run mode is started by turning on the test run switch, and after a predetermined period of time, the circulation pump and automatic make-up water valve are turned off to cancel the test run mode. hot water heater.