JPH06317323A - Control method of safety device for indoor setting type combustor - Google Patents

Abstract

PURPOSE:To make possible automatic extinguishing when combustion specifications are out of initial values by setting data of the combustion specifications of an airing system in a combustion chamber on an electric unit as initial valve from the minimum to maximum safe combustion. CONSTITUTION:An exhaust cylinder 34 with the optimum length is set on a water heater 1. Then, the temperature of supply hot water is changed from the minimum to the maximum temperature to detect the current pressure of an exhaust in a first combustion chamber 2 with a first pressure sensor 50 and a signal data thereof is stored into an electronic unit 44 as initial value in the supply hot water. Then, the temperature of the hot water in a bathtub 22 is changed to the maximum temperature used from the minimum temperature to detect the current pressure of the exhaust of a second combustion chamber 3 with a second pressure sensor 51 and a signal data thereof is stored into the electronic unit 44 as initial value in the boiling for a bath. Then, when the measurement data within the combustion chamber during the combustion are out of the initial values stored previously, a safety device is actuated to cut a gas thereby stopping combustion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor-installed combustor for automatically burning a burner installed in a combustion chamber of a combustor by operating a combustor installed in the room with an electronic unit. The present invention relates to a control method for a safety device that automatically detects a defective combustion inside and extinguishes the fire.

[0002]

2. Description of the Related Art An indoor-installed combustor installed indoors, for example, a water heater, has a user igniting a pilot burner in advance and opening a hot water tap in this state.
The water is automatically supplied to the heat exchanger, the main burner is ignited, and the hot water generated in the heat exchanger is supplied. Further, by adjusting the gas supply amount to the main burner during combustion, the combustion amount of the main burner is adjusted to adjust the hot water supply temperature. Moreover, such a water heater can supply water to a plurality of places such as a bathtub, a kitchen, and a washroom by itself.

Each time the water heater is used, the user must ignite or extinguish the pilot burner each time.
The operation is troublesome. Therefore, in recent years, in order to improve the operability and convenience of the water heater, an electronic unit is incorporated in the water heater, and automatic water supply to the heat exchanger, automatic gas supply to the main burner, automatic ignition of the main burner, etc. In the meantime, a controller for remotely operating the electronic unit is provided in the room, and by operating the controller, the water heater is remotely operated, and the bathtub is automatically filled with water, boiled, and kept warm. Furthermore, there are some that allow reserved driving and the like.

By the way, these water heaters are equipped with various sensors such as a frame rod and a temperature fuse in order to prevent the burner from going out and being heated during hot water supply, and a gas valve or a gas valve is automatically operated based on a signal from the sensor. It is designed to close the water supply valve and stop the operation of the water heater.

[0005]

All of the conventional water heaters have a safety device incorporated therein to prevent the burner from disappearing and the boiler being heated. However, it is necessary to monitor changes in combustion specifications of the air supply / exhaust system. Therefore, the combustion failure of the burner due to the variation of the combustion specifications cannot be detected.

Combustion specifications of the supply / exhaust system include exhaust pressure in the combustion chamber, supply pressure, exhaust temperature, and the like, and the influence of changes in these combustion specifications on combustion cannot be ignored in automatic operation. . For example, a bird makes a nest in the exhaust stack,
If foreign matter enters or the exhaust stack is clogged, the exhaust pressure becomes abnormally high, which may cause backfire.
On the contrary, if a hole is formed in the exhaust stack or if the exhaust stack is disengaged, the exhaust gas leaks into the room. In addition, the air supply port may be blocked and insufficient air supply may not be performed.

In order to solve such a problem, it is sufficient to monitor the fluctuation of combustion specifications during hot water supply. The combustion specifications depend on the environment of the place where the water heater is installed and the exhaust gas connected. It depends on the length of the cylinder, etc. and is not always constant. Therefore, the variation range of the combustion specifications cannot be set in advance in the electronic unit incorporated in the water heater.

The above-mentioned problems similarly occur in the exhaust air exhaust type fan heater for heating used indoors, and it is necessary to monitor the combustion failure due to the fluctuation of the combustion specifications. The present invention provides a control method of a safety device in which a variation range of combustion specifications of a combustor is set according to installation conditions, and when the combustion specifications deviate from initial values, a fire is extinguished automatically.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a combustor installed in a room is operated by an electronic unit, and the electronic unit automatically burns a burner in a combustion chamber. Provided with a sensor for detecting the variation of the combustion specifications of the air supply and exhaust system in the combustion chamber, the data from the sensor is sent to the electronic unit, and the data deviates from the initial value set in the electronic unit in advance,
This is a safety device control method that shuts off gas and stops combustion.After installing a combustor indoors and connecting the optimal exhaust stack to the combustion chamber, the combustor is burned from the safest combustion to the safest combustion. The operation is performed until the time, the fluctuation of the combustion specifications of the air supply / exhaust system in the combustion chamber in this operating range is measured, and the data is set in the electronic unit as an initial value.

[0010]

According to the above control method, the combustor is installed indoors, the exhaust pipe having the optimum length is connected, the combustor is once operated, and the supply / exhaust system in the combustion chamber during operation under the installation condition is operated. Since the initial values of combustion parameters are calculated and the initial values are set in the electronic unit, the combustion state according to the installation conditions can be grasped and the safety device can be accurately controlled.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a forced exhaust type water heater will be described below with reference to FIGS.

The water heater (1) shown in FIG. 1 has two combustion chambers, for example a hot water supply first combustion chamber (2) and a bath boiling second combustion chamber (3). A hot water supply heat exchanger (4) and a hot water supply burner (5) are provided in the first combustion chamber (2), and a water supply automatic control device (7) is provided in a water supply pipe (6) to the hot water supply heat exchanger (4). . A hot water supply pipe (10) from the hot water supply heat exchanger (4) is provided with a temperature control thermistor (11).

The first gas supply pipe (1) to the hot water supply burner (5)
2), a source solenoid valve (13), a hot water supply main solenoid valve (14), and a gas governor proportional solenoid valve (15) are provided from the upstream side. Further, the first combustion chamber (2) is provided with a spark plug (16) for igniting the hot water supply burner (5) and a hot water supply fan (17) for supplying combustion air to the hot water supply burner (5) and forcibly exhausting it. There is. A bath heat exchanger (20) and a bath burner (21) are provided in the second combustion chamber (3), the bath heat exchanger (20) is connected to a bathtub (22), and the bath heat exchanger (22) is connected to the bath heat exchanger ( A pump (24) is provided in the return pipe (23) to 20). A temperature control thermistor (25) is provided on the return pipe (23).

The second gas supply pipe (26) to the bath burner (21) is the original solenoid valve (1) of the first gas supply pipe (12).
3) is connected between the hot water supply main solenoid valve (14) and a gas governor (27) and a bath solenoid valve (30) are provided from the upstream side. In addition, a bath burner (2
Spark plug (31) for igniting 1) and bath burner (2)
A bath fan (32) for supplying combustion air to 1) and forcibly exhausting it is provided.

The exhaust portions of the first combustion chamber (2) and the second combustion chamber (3) are integrated into one, and the exhaust pipe (34) is attached to the exhaust port (33). As shown in FIG. 2, the exhaust stack (34) has an indoor wall surface (3) provided with a water heater (1).
5) to the ceiling (40) of the bathroom (36) or living room (37)
It is piped inside and opens to the outside such as the balcony (41).

The water heater (1) has a hot water heat exchanger (4).
A safety device for preventing the heating of the bath heat exchanger (20) and the hot water supply burner (5) and the bath burner (21) disappearing is incorporated. For example, on the hot water supply side, a water flow switch (42) is provided in the water supply pipe (6) to the hot water heat exchanger (4), and the frame rod is placed at a position where the flame of the hot water burner (5) in the first combustion chamber (2) strikes. (43) is provided, and each signal is transmitted to the electronic unit (44). The bath heat exchanger (2
The water flow switch (45) is provided in the return pipe (23) to the 0), and the frame rod (46) is provided at a position where the flame of the bath burner (21) of the second combustion chamber (3) is hit, and the respective signals are provided. Is transmitted to the electronic unit (44).

The operation of the water heater is performed by a controller (not shown) provided in the room, and the electronic unit (44) collectively controls in response to a signal from the controller.
At the time of hot water supply, the electronic unit (44) uses the original solenoid valve (13)
Also, the hot water supply main solenoid valve (14) is opened, gas is supplied to the hot water supply burner (5), the hot water supply fan (17) is rotated at the number of revolutions corresponding to the hot water supply set temperature, and the spark plug (16) is used to supply hot water. The burner (5) is ignited, at the same time the hot water tap (not shown) is opened, water is supplied to the hot water heat exchanger (4), and the hot water generated in the hot water heat exchanger (4) is used in the kitchen or washbasin. Or supply water to the bathtub. And the electronic unit during hot water supply (44)
Compares the hot water supply temperature measured by the thermistor (11) provided in the hot water supply pipe (10) with the hot water supply set temperature of the controller, so that the hot water supply temperature always becomes the hot water supply set temperature,
Correct the gas amount.

The safety device of the electronic unit (44) monitors the operating state, and if the hot water supply burner (5) is not ignited or disappears during hot water supply, it is provided in the first combustion chamber (2). The flame rod (43) detects and stops the signal, closes the original solenoid valve (13), shuts off gas, stops water supply, and stops hot water supply. When water is no longer supplied to the hot water heat exchanger (4), the water flow switch (42) provided in the water supply pipe (6) detects it,
Send a signal, close the original solenoid valve (13) to shut off the gas,
It is designed to stop hot water supply.

When boiling the hot water in the bathtub (22),
The main solenoid valve (13) and the bath solenoid valve (30) are opened to supply gas to the bath burner (21), the spark plug (31) is ignited, and the bath fan (32) is rotated according to the set temperature. And at the same time the pump (24) is rotated so that the hot water in the bathtub (22) flows from the return pipe (23) to the bath heat exchanger (2).
0), and the hot water boiled in the bath heat exchanger (20) is returned to the bathtub (22) through the return pipe (47). And bathtub (2
2) The temperature measured by the thermistor (25) provided in the return pipe (23) from the bath heat exchanger (20) is compared with the set temperature of the controller, and if the measured temperature and the set temperature match. , The pump (24) is stopped, the bath solenoid valve (30) and the original solenoid valve (13) are closed to shut off the gas,
Stop heating the bath.

The electronic unit (44) is also used when the bath is heated.
The safety device built in monitors the operating state, and if the bath burner (21) is not ignited or goes out, the flame rod (46) provided in the second combustion chamber (3) detects it. The signal is stopped, the original solenoid valve (13) is closed to shut off the gas, and the bath heating is stopped. In addition, when there is no hot water in the bathtub (22) or no hot water enters from the bathtub (22), the water flow switch (45) provided in the return pipe (23) detects the absence of hot water and the original solenoid valve. Close (13) to shut off the gas and stop the bath heating.

In the present invention, the safety device is provided with a sensor for monitoring the variation of combustion parameters in the first combustion chamber (2) and the second combustion chamber (3), for example, the first pressure sensor (50) and the first pressure sensor (50). Two pressure sensors (51) are provided, and the first pressure sensor (5
0) constantly transmits a signal according to the exhaust pressure in the first combustion chamber (2) to the electronic unit (44), and the second pressure sensor (51) outputs the exhaust pressure in the second combustion chamber (3). Is transmitted to the electronic unit (44).

In the electronic unit (44), when hot water is supplied, the signal from the first pressure sensor (50) is compared with a preset initial value. Close the valve (13), burner for hot water supply (5)
It stops the combustion of water and stops hot water supply.
In addition, when the bath is heated, the signal from the second pressure sensor (51) is compared with a preset initial value, and if the signal sent out deviates from the initial value, the original solenoid valve (13) is closed and the bath is heated. The burning of the burner (21) is stopped to stop the bath heating.

To set the above-mentioned initial values, after installing the water heater (1) at a predetermined position on the wall surface (35) indoors, after connecting the exhaust pipe (34) of an optimum length according to the installation conditions, This is done by operating the water heater (1). That is, first, the hot water supply operation is performed, the hot water supply temperature is changed from the minimum temperature to the maximum temperature, and the exhaust pressure in the first combustion chamber (2) at that time is detected by the first pressure sensor (50). Is stored in the electronic unit (44) as an initial value for hot water supply. Next, a bath heating operation is performed to change the hot water supply temperature in the bathtub (22) from the lowest temperature to the highest temperature used, and the exhaust pressure in the second combustion chamber (3) at that time is set to the second pressure sensor ( 5
The signal data is detected in 1), and the signal data is stored in the electronic unit (44) as an initial value for bath heating.

In the water heater (1) incorporating the above safety device, if the exhaust pipe (34) is clogged, the first combustion chamber (2) or the second combustion chamber ( 3)
Since the exhaust pressure inside becomes high and the signal from the first pressure sensor (50) or the second pressure sensor (51) deviates from the initial value, it is possible to detect an abnormal state and stop combustion. Further, when a hole is opened or removed in the exhaust stack (34), the exhaust pressure in the first combustion chamber (2) or the second combustion chamber (3) becomes low, and the first pressure sensor (50) or the second pressure Since the signal from the sensor (51) deviates from the initial value, it is possible to detect an abnormal state and stop combustion.

Further, as a method of detecting the fluctuation of the combustion specifications, there is also a method of detecting the current fluctuation associated with the load fluctuation of the electric motor (not shown) for rotating the hot water supply fan (17) and the bath fan (32). is there. That is, when the exhaust pressure changes, the hot water supply fan (17) or the bath fan (3
The load of 2) also changes and the current changes. The safety device is controlled by detecting this change in current. To set the initial value, after installing the water heater (1), operate it once and measure the current fluctuation of the electric motor within the safe combustion range,
The measured value is stored in the electronic unit (44) as an initial value.

Alternatively, the supply air pressure of the water heater (1) may be measured and the change in the supply air pressure may be measured.

Although the above embodiment shows the water heater (1) having the hot water supply function and the bath heating function, the same applies to the hot water supply single function water heater (52) shown in FIG. Applicable. In this case, the second combustion chamber (3) and its accompanying parts are eliminated, and the second pressure sensor (51) is also unnecessary.
Moreover, not only the pressurizing type water heater but also the negative pressure type water heater can be applied. Further, it can be similarly applied to a fan heater for heating.

[0028]

According to the present invention, after the combustor is installed indoors, the combustor is operated to operate from the minimum safe combustion to the maximum safe combustion, and the combustion of the supply / exhaust gas in the combustion chamber at that time is performed. When the measured data of the specifications are stored in the electronic unit as initial values, the measured data of the combustion specifications of the supply / exhaust gas in the combustion chamber during combustion are transmitted to the electronic unit, and the measured data deviates from the initial values stored in advance. Since the safety device is activated to shut off the gas and stop the combustion, the control becomes accurate.

Therefore, even if the exhaust pipe connected to the combustor is clogged or comes off, it is immediately detected,
Since the combustion is stopped, it is very safe.

[Brief description of drawings]

FIG. 1 is a schematic view of a water heater according to the present invention.

FIG. 2 is a schematic view showing an installed state of a water heater.

FIG. 3 is a schematic view showing another embodiment.

[Explanation of symbols]

 1 Hot Water Heater 2 Combustion Chamber (First Combustion Chamber) 4 Hot Water Heat Exchanger 5 Hot Water Supply Burner 34 Exhaust Cylinder 44 Electronic Unit 50 Pressure Sensor (First Pressure Sensor)

Claims (1)

[Claims] 1. An indoor-installed combustor in which a combustor installed in a room is operated by an electronic unit, and the electronic unit automatically burns a burner in the combustion chamber. A sensor that detects fluctuations in the combustion specifications of the system is provided, the data from the sensor is sent to the electronic unit, and when the data deviates from the initial value set in the electronic unit in advance, the gas is shut off and combustion is stopped. This is a control method of a safety device that installs a combustor indoors, connects the optimal exhaust stack to the combustion chamber, then operates the combustor from the minimum safe combustion to the maximum safe combustion The method for controlling a safety device for an indoor-installed combustor, characterized in that the fluctuations in the combustion specifications of the air supply / exhaust system in the combustion chamber are measured, and the data is set as the initial value in the electronic unit.