JPS63176923A - Forced suction and exhaust type combustion apparatus - Google Patents

Abstract

PURPOSE:To obtain the safety of a system including a FF burner and a pipeline, by a method wherein the title apparatus is equipped with a control unit, which stops the burning operation of a combustion unit by an abnormality signal from a safety checking unit. CONSTITUTION:When a power source switch 7 is put ON, a control unit 16 outputs a signal to close a solenoid valve 12 and start the operation of an exhaust fan 11 simultaneously. Under such condition, a pressure in an exhaust pipeline 13 increases when it is normal but the pressure does not increase to a value higher than a given value when it is abnormal. The signal of the pressure is detected by a pressure sensor 14 and is transmitted to the control unit 16. The control unit 16 judges that the exhaust pipeline 13 is normal when the pressure signal is higher than a cut-off value, opens the solenoid valve 12, starts the operation of a combustion unit 9 and advances room heating sequence. On the other hand, when the pressure signal does not increase to a value higher than the cut-off value, the control unit 16 judges that the exhaust pipeline 13 is abnormal and shifting to combustion sequence is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a combustion device such as a forced intake/exhaust type heater that burns outdoor oxygen and exhausts the air outdoors.

Conventional technology In recent years, forced intake/exhaust type heaters (hereinafter referred to as FF heaters) have been developed because of their ability to heat the indoor air without polluting it. It is attracting attention as the indoor environment during heating is being reconsidered. However, defects due to corrosion of the exhaust piping and poisoning caused by construction errors remain the same as before.

An example of the conventional OFF heater mentioned above will be described below with reference to the drawings.

FIG. 4 shows the configuration of a conventional OFF heater. 1
is the power switch, which turns the appliance on and off. Reference numeral 2 denotes an intake pipe that connects the outside air and the inside of the sealed device main body 18.

3 is a combustion section. 4 is the internal piping. Reference numeral 5 denotes an exhaust fan, which sends the exhaust gas generated in the combustion section 3 to the outside of the room through the internal piping 4. Reference numeral 6 denotes an exhaust pipe that penetrates the wall 17 and connects the exhaust fan 6 to the outside.

The operation of the FF heater configured as above will be described below.

When the power switch 1 is turned on, the combustion section 3 and the exhaust fan 5 start operating. The relationship between intake and exhaust at this time will be explained. When the exhaust fan 5 operates, outside air passes through the intake pipe 2 and is sent to the combustion section 3. Combustion part 3
The heat generated is used for heating. Further, the exhaust gas after combustion passes through an exhaust fan 5 via an internal pipe 4, and then is sent out to the outside through an exhaust pipe 6.

Problems to be Solved by the Invention However, in the above configuration, exhaust gas enters the room due to a defect in the exhaust pipe 6 or a mistake in construction, resulting in accidents such as carbon oxide poisoning. No matter how much the safety of FF heaters is improved, this kind of accident cannot be solved unless the system including the piping is considered, and half of the safety is left to the piping work. Furthermore, the durability of the piping and the environment in which it is used vary depending on the construction situation, which poses a major safety problem.

In view of the above problems, the present invention provides a forced intake/exhaust type combustion apparatus in which the condition of the exhaust piping is checked for safety each time the appliance is operated, and if there is no problem, the combustion sequence of the appliance is advanced.

Means for Solving the Problems In order to solve the above problems, the present invention provides a combustion section having an intake passage and an exhaust passage communicating with the outdoors, an exhaust fan for discharging exhaust gas from the combustion section, and an exhaust fan for discharging exhaust gas from the combustion section. The apparatus includes a safety check section that detects an abnormality in the exhaust flow in the exhaust path downstream of the exhaust fan, and a control section that stops the combustion operation of the combustion section based on an abnormality signal from the safety check section.

Operation According to the above-described configuration, the control section controls the combustion section based on the abnormality signal from the safety check section, and stops the transition to combustion. Therefore, the above-mentioned operation makes it possible to detect defects in the exhaust piping and construction errors, thereby ensuring the safety of the system including the FF combustor and piping.

EXAMPLE Hereinafter, an FF heater employing an example of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of an FF heater in an embodiment of the present invention. In FIG. 1, 7 is a power switch and is used to maintain the equipment.

Reference numeral 8 denotes an intake pipe that penetrates the wall 17 and connects the outside air to the inside of the instrument main body 1B. 9 is a combustion section. 10 is an internal pipe connected to the exhaust side of the combustion section 9. 11 is an exhaust fan whose intake side is connected to the internal piping 10;
Exhaust gas generated in the room is exhausted outside. Reference numeral 13 denotes an exhaust pipe which penetrates the wall 17 and has a solenoid valve 12 at its other end facing outdoors, and whose one end is connected to the discharge side of the exhaust fan 11. A pressure sensor 14 detects the pressure inside the exhaust pipe 13.

A safety check section 15 is composed of an exhaust fan 11, a solenoid valve 12, an exhaust pipe 13, and a pressure sensor 14, and detects an abnormality (exhaust leak) in the exhaust pipe 13. A control section 16 is connected to the pressure sensor 14, the exhaust fan 11, the electromagnetic valve 12, and the combustion section 9, and controls the safety check of the appliance and the heating sequence, and causes each section to execute the control section.

Regarding the FF heater configured as above, the following is the first
The operation will be explained using FIGS. 2 and 3.

First, FIG. 2 shows the operation when the exhaust piping is normal, and FIG. 3 shows the operation when the exhaust piping is abnormal. When the power switch 7 is turned on, the control unit 16 issues a signal and the solenoid valve 12 is closed, at the same time the exhaust fan 11 starts operating. In this state, if the pressure inside the exhaust pipe 13 is normal, it will rise, but if it is abnormal, it will not rise above a certain value. This pressure signal is detected by the pressure sensor 14 and transmitted to the control section 16. If the pressure signal is equal to or higher than the cutoff value, the control unit 16 determines that the exhaust pipe 13 is normal, opens the solenoid valve 12, starts operation of the combustion unit 9, and advances the heating sequence. Further, if the pressure signal does not rise above the cutoff value as shown in FIG. 3, the control unit 16 determines that the exhaust pipe 13 is abnormal and stops the transition to the combustion sequence.

As described above, according to this embodiment, there is a power switch that takes care of appliances, a control unit that receives signals from the power switch, performs a safety check of the appliances, and a heating sequence, and receives signals from the control unit. a safety check section having an exhaust fan that operates, a solenoid valve that shuts off outside air, a pressure sensor that detects pressure between the exhaust fan and the solenoid valve, and transmits the pressure to the control section; and the safety check section. a combustion section that burns in response to a signal from the control section based on the judgment, an intake pipe connecting the combustion section to the outside, and a device connecting the combustion section and the exhaust fan. By installing internal piping and exhaust piping that has the safety check section described above, it is possible to detect defects in the exhaust piping and construction errors, and the safety of the system including the FF heater and piping can be ensured. becomes.

Effects of the Invention As described above, according to the present invention, if there is an abnormality in the exhaust flow in the exhaust path such as the exhaust piping below the exhaust fan, the safety check section detects this and the control section controls the combustion operation. Since the transition is stopped, construction errors in the exhaust piping and defects due to corrosion can be discovered, preventing carbon monoxide poisoning caused by this, and ensuring the safety of the entire system including the FF combustor and piping. can.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an FF heater in an embodiment of the present invention,
Figure 2 is an operation diagram when the exhaust piping in Figure 1 is normal.
Figure 3 is an operation diagram when the exhaust piping in Figure 1 is abnormal.
FIG. 4 is a block diagram of a conventional OFF heater. 8...Intake piping (intake path), 9...
Combustion part, 11...Exhaust fan, 13...
...Exhaust piping (exhaust path), 14...Pressure sensor, 15...Safety check section, 16...
・Control unit. Name of agent: Patent attorney Toshio Nakao and 1 other person7-
Power supply unit 8 - Gas pipe 9 - Combustion section 10 - Internal pipe II - Exhaust fan 12 - t ai valve 13 - Exhaust pipe 14 Ec 7) t''', i length Fig. 1 15 - All 1,000 views I-tsuku part/6=IP
I fR section Figure 2 M11! Time figure 3! il M- Figure 4

Claims (1)

[Claims] a combustion section having an intake passage and an exhaust passage communicating with the outdoors;
An exhaust fan that discharges exhaust gas from the combustion section, a safety check section that detects abnormalities in the exhaust flow in the exhaust path downstream of the exhaust fan, and an abnormality signal from the safety check section that causes the combustion of the combustion section. A forced intake/exhaust combustion device equipped with a control section that stops the operation of the