JPH04273946A - Bath tub water heating system - Google Patents

Abstract

PURPOSE:To maintain bath tub water at a preset temperature and eliminate waste of fuel. CONSTITUTION:When water in a bath tub is heated up to a setting temeperature by means of a main burner 20 of large heating power, a contorl section 31 halts the operation of the main burner 20 based on a detection signal of a temperature sensor 30 and heats up the bath tub water up to the setting temperature by means of a pilot burner 21 of a small heating power. When the water is heated up to the setting temperature, the control section 31 helts the operation of the pilot burner 21, thereby preventing the temperature of the bath tub water from exceeding the setting temperature.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub water heating system for heating water in a bathtub.

0002

2. Description of the Related Art Generally, in a bathtub water heating system for heating water in a bathtub, water drawn from the bathtub is heated by a burner and then returned to the bathtub. Further, this bathtub water heating system is provided with a temperature sensor for detecting the temperature of water in the bathtub, and a control section that controls the operation of the burner based on a detection signal from the temperature sensor. When the water in the bathtub is heated to a preset desired temperature, the control unit stops the burner based on the detection signal from the temperature sensor, and when the temperature of the bathtub water drops by a predetermined temperature below the set temperature. Based on the detection signal from the temperature sensor, the control section operates the burner again to warm the bathtub water to the set temperature, so that the bathtub water is always maintained at the set temperature.

0003

However, in the conventional bathtub water heating system described above, the burner is stopped when the bathtub water is heated to a predetermined temperature; The bathtub water gets heated above the temperature and cannot be kept at the set temperature, and
There is a problem in that fuel is wasted when the temperature of the bathtub water exceeds the set temperature.

The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a bathtub water heating system that can maintain bathtub water at a set temperature and that does not waste fuel. It's about doing.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a bathtub water heating system for heating bathtub water to a set temperature, including a temperature sensor for detecting the temperature of the bathtub water. a sub-burner with low thermal power for heating the bathtub water; a main burner with high thermal power that burns based on the combustion of the sub-burner and heats the bathtub water; and a main burner with high thermal power for heating the bathtub water. Controls the operation of the burner, and operates the sub-burner and main burner until just before the bath water reaches the set temperature, and
The main burner is stopped immediately before the bathtub water reaches the set temperature, and the control section is configured to raise the temperature of the bathtub water to the set temperature by operating only the sub-burner thereafter.

[0006]

[Operation] Therefore, according to the present invention, the water in the bathtub is heated by the main burner with high thermal power until just before it reaches the set temperature, and the control section then stops the main burner based on the detection signal of the temperature sensor. The bathtub water is heated to a set temperature by a low-power sub-burner. and,
When the bathtub water is heated to the set temperature, the control unit stops the sub-burner based on the detection signal from the temperature sensor, and the bath water does not rise above the set temperature.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will be described below with reference to the drawings. As shown in FIG. 1, an inlet 3 and an outlet 4 for water inside the bathtub 1 are provided in the bathtub 1. A suction pipe 5 and a discharge pipe 6 are connected to the suction port 3 and the discharge port 4, respectively, and the suction pipe 5 and the discharge pipe 6 constitute a circulation path 7. The suction pipe 5 is connected to the discharge pipe 6 via the heating device main body 8, and a pump 9 is arranged on the suction pipe 5. The bathtub water introduced from the suction port 3 by the pump 9 is heated to a desired temperature by the heating device main body 8 and flows out from the discharge port 4.

As shown in FIG. 2, the heating device main body 8 has a burner section 10 and a heat exchanger 11 for transmitting the heat generated by the burner section 10 to bath water. The oil tank 12 is an oil leveler 1 provided in the burner section 10.
3, and the oil leveler 13 is provided with a first electromagnetic pump 14 and a second electromagnetic pump 15. Note that the oil leveler 13 is used to keep the amount of fuel flowing from the oil tank 12 constant. A main nozzle 18 and a pilot nozzle 19 are connected to the first electromagnetic pump 14 and the second electromagnetic pump 15 via supply pipes 16 and 17, respectively.

The burner section 10 is provided with a main burner 20 with a large thermal power and a pilot burner 21 as a sub-burner with a small thermal power.
and a combustion tube 23 communicating with the vaporization tube 22. The vaporizing cylinder 22 is located above the pilot burner 21. The tip of the main nozzle 18 is inserted into the vaporizing cylinder 22 of the main burner 20, and the tip of the pilot nozzle 19 is inserted into the combustion chamber 24 in the pilot burner 21. Further, the tip of an ignition heater 25 is inserted into the combustion chamber 24, and an ignition wick 26 is arranged on the lower surface inside the combustion chamber 24. Blower 27
is arranged at one end of the main burner 20 and the pilot burner 21, and sends air into the vaporization cylinder 22 of the main burner 20 and the combustion chamber 24 of the pilot burner 21.

The heat exchanger 11 is arranged above the main burner 20 and the pilot burner 21, and includes a bathtub water passage pipe 28 and a number of fins 2 attached to the passage pipe 28.
It consists of 9. Then, the combustion heat of the main burner 20 or the pilot burner 21 is absorbed by the fins 29 and the passage pipe 28, and the bathtub water passing through the passage pipe 28 is heated.

As shown in FIGS. 2 and 3, a heat exchanger 11
A temperature sensor 30 for detecting the temperature of the bath water is attached near the entrance of the passage pipe 28 , and a detection signal from the temperature sensor 30 is input to the control section 31 . And the control section 3
1 is based on the detection signal of the temperature sensor 30.
electromagnetic pumps 14, 15, ignition heater 25 and blower 2
7 is operated and controlled. Note that the desired set temperature of the bathtub water is input to the control section 31 from the input section 32 .

Next, the operation of the bathtub water heating system constructed as described above will be explained. Now, when the bathtub water heating system is operated with low-temperature water being supplied into the bathtub 1 and a desired temperature of the bathtub water being input from the input section 32, the pump 9 causes water to flow through the suction port 3 into the bathtub 1. is sucked in, and the bath water is introduced into the heating device main body 8 through the suction pipe 5. Then, the temperature sensor 30 provided in the passage pipe 28 of the heating device main body 8 detects the temperature of the bathtub water passing through the passage pipe 28, and the control unit 31 operates the ignition heater 25 using the detection signal as one of data. At the same time, the second electromagnetic pump 15 and the blower 27 are operated, and the fuel flowing into the oil leveler 13 from the oil tank 12 is transferred to the supply pipe 17.
is sent to the pilot nozzle 19 via. Then, the combustion chamber 24 of the pilot burner 21 is heated by the ignition heater 25.
When fuel is supplied from the pilot nozzle 19 onto the ignition wick 26 within the combustion chamber 24 in a heated state, the fuel is evaporated and combusted.

When the pilot burner 21 starts combustion as described above, the vaporization cylinder 22 is heated by the combustion heat. Incidentally, at this point, the ignition heater 25 is no longer necessary and its operation is stopped. Then, using the detection signal of the bath water temperature from the temperature sensor 30 as one of the data, the control unit 31 operates the first electromagnetic pump 14, and fuel is sent to the main nozzle 18. When fuel is supplied from the main nozzle 18 into the vaporization tube 22 while the vaporization tube 22 is heated, the fuel is evaporated and vaporized, and the air from the blower 27 converts the fuel into a mixed gas into the combustion tube 22. sent within. The mixed gas is ignited by the combustion flame of the pilot burner 21, whereby the main burner 20 starts combustion. Then, the combustion heat of the main burner 20 is absorbed by the fins 29 provided in the passage pipe 28, and the bathtub water passing through the passage pipe 28 is heated.

As shown in FIG. 4, the water in the bathtub 1 is rapidly heated by the combustion of the main burner 20, which has a large thermal power.
When the bath water is heated to a temperature 2 degrees lower than the preset temperature, the control unit 31 stops the first electromagnetic pump 14 based on the detection signal from the temperature sensor 30, and the combustion in the main burner 20 is stopped. will be stopped. Then, the bathtub water is heated to a set temperature by the combustion of the pilot burner 21 with low thermal power and the residual heat of the main burner 20, etc. When the bathtub water is warmed to the set temperature, a control unit sends a signal based on a detection signal from the temperature sensor 30. 31 is the second electromagnetic pump 15
Then, the blower 27 is stopped, and combustion in the pilot burner 21 is stopped.

The temperature of the bathtub water gradually decreases by stopping both burners 20 and 21, but when the temperature of the bathtub water drops to 2 degrees lower than the set temperature, control is started based on the detection signal from the temperature sensor 30. The section 31 operates the ignition heater 25, and also operates the second electromagnetic pump 15 and the blower 2.
7 is activated, combustion in the pilot burner 21 is started again, and the bath water is heated to the set temperature.

[0016] In this way, once the bathtub water is heated to a temperature 2 degrees lower than the set temperature by the main burner 20, the pilot burner 21 is repeatedly fired and stopped to bring the temperature down to the set temperature and 2 degrees lower than the set temperature. The temperature is kept between low and low. Further, as shown in FIG. 4, when the temperature of the bathtub water drops by 5 degrees or more from the set temperature by adding low-temperature water into the bathtub 1, the controller 31 operates the first electromagnetic pump 14, and combustion in the pilot burner 21 is started. Then, as described above, when the bathtub water is heated to a temperature 2 degrees lower than the set temperature, combustion in the main burner 20 is stopped, and the bathtub water is heated to the set temperature by combustion in the pilot burner 21.

As described above, in this bathtub water heating system, the water in the bathtub 1 is quickly heated to a temperature 2 degrees lower than the set temperature by the main burner 20, which has a large thermal power, and then is heated by the pilot burner 21, which has a small thermal power. By repeating combustion and stopping, the bathtub water is kept at a temperature between the set temperature and a temperature 2 degrees lower than the set temperature. Therefore, even if the bathtub water is heated to the set temperature and the pilot burner 21 is stopped, the residual heat of the pilot burner 21 will not raise the bathtub water above the set temperature because the heating power is small, and the bathtub water will not rise above the set temperature. It is possible to reliably maintain the temperature up to 2 degrees lower, and
It is possible to eliminate waste of fuel due to the temperature of the bathtub water being higher than the set temperature.

[0018]

As described in detail above, according to the present invention, bath water can be maintained at a set temperature, and there is no risk of wasting fuel, which is an excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of a bathtub water heating system embodying the present invention.

FIG. 2 is a configuration diagram of a heating device main body.

FIG. 3 is a block diagram showing the operation of a control section.

FIG. 4 is a time chart showing the operation of the bathtub water heating system.

[Explanation of symbols]

20 main burner, 21 pilot burner (sub burner), 30 temperature sensor, 31 control unit.

Claims (1)

[Claims] 1. A bathtub water heating system for heating bathtub water to a set temperature, comprising: a temperature sensor (30) for detecting the temperature of the bathtub water; and a sub-burner (30) with low thermal power for heating the bathtub water. 21), a main burner (20) which burns based on the combustion of the sub-burner (21) and has a large thermal power for heating the bath water, and each burner (20) based on the detection signal from the temperature sensor (30). 20
, 21) to operate the sub-burner (21) and the main burner (20) until just before the bathtub water reaches the set temperature, and to stop the main burner (20) just before the bathtub water reaches the set temperature. , then Subvarna (21
1. A bathtub water heating system characterized by comprising: a control section (31) configured to raise the temperature of bathtub water to a set temperature by operating only a control section (31).