JP2000121074A - Hot-water heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the excessive temperature rise of a heater more than needed following the temperature fluctuation of supplied hot water by providing a duty ratio setting means which sets a duty ratio when the temperature of the hot water is a standard temperature and a thermally actuated valve is opened and an opening controlling means which controls the opening of the thermally actuated valve based on the duty ratio corrected when the temperature of the hot water deviates from the standard temperature. SOLUTION: A heat source machine 30 detects the temperature of low-temperature water in the outlet-side pipeline 6b of a hot water circulating pump 7 by means of a temperature sensor 8 for controlling low-temperature heating which measures the temperature of hot water when low-temperature heating is made. The low-temperature water is pumped out from a hot water tank 5 by means of the pump 7 and returned to the tank 5 not through a heat exchanger 1, but through a pipeline 6e and a hot-water floor mat 11. A thermistor 25 for controlling high-temperature heating detects the temperature of high-temperature water in the outlet-side pipeline 6c of the heat exchanger 1. The high-temperature hot water is heated through the exchanger 1 and returned to the tank 5 through the pipeline 6c and a hot-water air conditioner 4. A proportional valve 16 for gas, a solenoid valve 18 for gas, and a main solenoid valve 19 for gas are connected to a fuel pipeline 17 through which fuel is supplied to a gas burner 2 and the valve travel of a gas proportional valves 16, gas solenoid valve 18, and a main gas solenoid 19 are controlled in accordance with commands from a microcomputer. The deviation of the temperature of the hot water from the standard temperature is corrected based on the duty ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water type heating apparatus provided with a thermal valve controlled to open and close.

[0002]

2. Description of the Related Art In general, there is known a hot water type heating apparatus for heating a room by supplying hot water to a heater through a heat valve controlled to be opened and closed by a heat source unit.

In this type of hot water type heating apparatus, a duty ratio at the time of opening of a heat valve which varies according to a load at a reference temperature of hot water (for example, 60 ° C.) is set in advance, and the heat hydraulic valve is operated in accordance with the duty ratio. The valve is controlled to open.

[0004] As a heater to which hot water controlled at the reference temperature (for example, 60 ° C) is supplied, for example, a floor heater is known.

[0005]

However, conventionally,
Hot water at a temperature exceeding the reference temperature (for example, 80 ° C.) may be supplied to the floor heating or the floor material having a large thermal resistance.

In this case, when the conventional duty ratio control is performed, there is a problem in the floor heater or the like that, for example, the temperature of the floor rises more than necessary.

[0007] Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and to suppress a rise in the temperature of the heater more than necessary following the change when the temperature of the supply hot water changes. It is an object of the present invention to provide a hot water type heating device.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a hot-water system in which hot water is supplied to a heater through a thermal valve that is controlled to open and close to heat a room. In the heating device, means for setting a duty ratio at the time of opening the thermal valve at the time of the reference temperature of the hot water, means for correcting the duty ratio when the temperature of the hot water deviates from the reference temperature, and Means for controlling opening of the thermal valve based on a duty ratio.

According to a second aspect of the present invention, there is provided a hot water heating apparatus for heating a room by supplying hot water to a heater through a thermal valve that is controlled to open and close. Means for setting a duty ratio when the thermal valve is opened, means for correcting the duty ratio when the temperature of the hot water deviates from the reference temperature, and the thermal valve based on the corrected duty ratio. Opening control means.

According to a third aspect of the present invention, there is provided a hot water heating apparatus for heating a room by supplying hot water to the heater through a thermal valve that is controlled to open and close. Means for setting a duty ratio at the time of opening of the thermal valve corresponding to a deviation between a set temperature and room temperature; means for correcting the duty ratio when the temperature of the hot water deviates from the reference temperature; and Means for controlling opening of the thermal valve based on the ratio.

In these inventions, the duty ratio is corrected when the temperature of the hot water supplied to the heater via the thermal valve that is controlled to open and close deviates from the reference temperature, and the heat ratio is corrected based on the corrected duty ratio. Since the valve is controlled to open,
The heating of the heater is not excessively increased, and comfortable heating is performed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a hot water type heating apparatus according to the present invention. Reference numeral 30 denotes a heat source unit. The heat source unit 30 is supplied with a hot water floor mat 11 for low-temperature heating (for example, hot water of 60 ° C. is supplied) and a hot-water floor mat 11 (for example, hot water of 80 ° C. is supplied). Hot water air conditioner 4 is connected. The hot water tank 5 is housed in the heat source device 30. The hot water tank 5 is connected to a hot water circulation pump 7 via a pipe 6a, and the hot water circulation pump 7 is connected to the heat exchanger 1 via a pipe 6b.

The heat exchanger 1 includes a gas burner (combustion machine)
The hot water in the heat exchanger 1 is heated by the heat of combustion by the gas burner 2.

The heat exchanger 1 is connected to a hot water air conditioner 4 having a high-temperature load via a pipe 6c. This conduit 6
c is connected to a bypass pipe 21 for returning a part of the hot water heated by the heat exchanger 1 to the hot water tank 5, the bypass pipe 21 is connected to a pipe 6d, and the pipe 6d is It is connected to the tank 5.

A hot water control valve (hereinafter, referred to as a thermal valve) 10 is connected to a pipe 6b on the outlet side of the hot water circulation pump 7 through a pipe 6e. Hot water floor mat 11 is connected. Reference numeral 20 denotes a remote controller, which is a control board C in the electrical box.
B, and can remotely control the combustion operation / stop of the equipment. Reference numeral 13 denotes a water level electrode disposed in the hot water tank 5, and reference numeral 14 denotes a water supply conduit for guiding water to the hot water tank 5, and includes a water injection solenoid valve 15 serving as an automatic water supply device.

The heat source unit 30 includes a thermistor (temperature sensor) for low-temperature heating control for measuring the temperature of hot water during low-temperature heating.
8 and a thermistor (temperature sensor) 25 for high-temperature heating control for measuring the temperature of hot water during high-temperature heating. The thermistor 8 for low-temperature heating control is provided in the pipeline 6b on the outlet side of the hot-water circulation pump 7, and detects the temperature of low-temperature hot water of, for example, 60 ° C. The low-temperature hot water is pumped from the hot water tank 5 through the hot water circulation pump 7, and does not pass through the heat exchanger 1.
Through the hot water tank 5. The thermistor 25 for high-temperature heating control is provided in the pipe 6c on the outlet side of the heat exchanger 1, and detects a high-temperature hot water temperature of, for example, 80 ° C. The high-temperature hot water is heated via the heat exchanger 1 and then returned to the hot water tank 5 through the pipeline 6c and the hot-water air conditioner 4.

Fuel is supplied to the gas burner 2 through a fuel line 17. A gas proportional valve 16, a gas solenoid valve 18, a source gas solenoid valve 19, and the like are connected to the fuel line 17, and these are connected to a microcomputer mounted on a control board CB. The opening is controlled.

In this embodiment, hot water of about 60 ° C. is supplied to the hot water floor mat 11 via the thermal valve 10, thereby performing floor heating.

The remote controller 20 has a room temperature sensor 2
0a is provided, and the room temperature sensor 20a is connected to the control board CB.
It is connected to the microcomputer mounted on. The thermal valve 10 is an on-off valve, and when the temperature of the hot water floor mat 11 is controlled,
The thermal valve 10 is controlled to open and close according to the duty ratio when the thermal valve 10 is opened corresponding to the indoor load at the reference temperature of the hot water (60 ° C.). For example, when the detected temperature of the room temperature sensor 20a is equal to the set temperature at the time of the reference temperature of the hot water, the duty ratio when the thermal valve 10 is opened is set to 50% as shown in FIG. That is, the opening time and the closing time of the thermal valve 10 are set to be equal. When the detected temperature of the room temperature sensor 20a is the set temperature -2 ° C, the thermal valve 1
The duty ratio at the time of opening 0 is set to 100%, and the thermal valve 10 is fully opened. This is for raising the temperature of the hot water floor mat 11. On the other hand, when the detected temperature of the room temperature sensor 20a is the set temperature + 2 ° C., the duty ratio when the thermal valve 10 is opened is set to 15%, and the thermal valve 1
A zero open time is limited. This is for lowering the temperature of the hot water floor mat 11. The above is the opening / closing control at the reference temperature (60 ° C.).

The temperature of the hot water may fluctuate, and hot water at a temperature exceeding the reference temperature (for example, 80 ° C.) may be supplied to the floor heating or a floor material having a large thermal resistance. . In this case, if the control is executed at the above-described duty ratio, the floor temperature rises more than necessary in the floor heater or the like.

In this embodiment, when the hot water temperature deviates from the reference temperature, the above-described duty ratio (100%, 50%,
15%) are corrected to duty ratios (60%, 30%, 9%) as shown in FIG.

The correction formula in this case is determined through a verification test, and is, for example, as shown in formula (1).

Tth = {(Tl-30) / (Th-30)} Ttl (1) Tth: Hot valve open time duty ratio when hot water temperature is Th (80 ° C.) Ttl: Hot water temperature is reference temperature Heat valve open time duty ratio at (60 ° C.) Tl: reference temperature (60 ° C.) Th: heating hot water high temperature (80 ° C.) To explain an example, as shown in FIG.
In this case, when the detected temperature of the room temperature sensor 20a is equal to the set temperature, the duty ratio when the thermal valve 10 is opened is set to 50%. However, if the temperature of the hot water is, for example, 80
If the temperature fluctuates to 50 ° C., even when the detected temperature of the room temperature sensor 20a is equal to the set temperature, 50% is calculated according to the following equation (2), and is corrected to 30%.

Tth = {(60-30) / (80-30)} 50 = 30% (2) Then, the thermal valve 10 is opened based on this 30%. That is, the thermal valve 10 is opened 30% and closed 70% in a time ratio.

In the above description, the heat source unit 30 is configured to be able to supply hot water (60 ° C. and 80 ° C.) having different temperatures. However, the present invention supplies only hot water (80 ° C.) having one kind of temperature, for example. The present invention is also applicable to those configured to be possible.

The description of the specific embodiment has been completed.
The present invention is not limited to the embodiments described above.

For example, in the above embodiment, a thermistor is used as the room temperature sensor, but other types of temperature sensors may be used. Further, the number of hot-water floor mats and the number of hot-water air conditioners are not limited to the illustrated examples. As the heat source unit, a unit using, for example, petroleum in addition to gas can be adopted.

[0029]

As described above, according to the present invention, the duty ratio is corrected when the temperature of the hot water supplied to the heater via the thermal valve controlled to open and close deviates from the reference temperature.
Since the thermal valve is controlled to be opened based on the corrected duty ratio, comfortable heating is performed without the temperature of the heater increasing excessively.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a hot water heating device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a duty ratio when a thermal valve is opened.

[Explanation of symbols]

 1 Heat Exchanger 4 Hot Water Air Conditioner 5 Hot Water Tank 7 Hot Water Circulation Pump 10 Heat Valve 11 Hot Water Floor Mat 20 Remote Controller 20a Room Temperature Sensor CB Control Board

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshinobu Koga 1-1, Dainitsuhigashi-cho, Moriguchi-shi, Osaka F-term (reference) in Sanyo Gas Equipment Co., Ltd. 3L070 AA09 BB03 DD02 DE03 DF01 DF06 DG06

Claims (3)

[Claims] 1. A hot-water heating device that supplies hot water to a heater through a heat-operated valve that is controlled to open and close to heat a room, comprising: a duty ratio when the heat-operated valve is opened at a reference temperature of the hot water. Setting means; setting means for correcting the duty ratio when the hot water temperature deviates from the reference temperature; and means for controlling the opening of the thermal valve based on the corrected duty ratio. And hot water heating system. 2. A hot-water heating apparatus for heating a room by supplying hot water to a heater through a hot-valve controlled to open and close, wherein the hot-valve corresponding to a load at a reference temperature of the hot water is opened. Means for setting the duty ratio at the time, means for correcting the duty ratio when the hot water temperature deviates from the reference temperature, and means for controlling the opening of the thermal valve based on the corrected duty ratio. A hot water heating device characterized by the following. 3. A hot-water heating apparatus for heating a room by supplying hot water to a heater through a thermal valve controlled to be opened and closed, wherein a deviation between a set temperature of the heater and a room temperature at a reference temperature of the hot water. Means for setting a duty ratio at the time of opening of the thermal valve corresponding to the following; means for correcting the duty ratio when the temperature of the hot water deviates from the reference temperature; and means for controlling the thermal operation based on the corrected duty ratio. Means for controlling the opening of the valve.