JPS63176922A - Forced suction and exhaust type combustion apparatus - Google Patents

Abstract

PURPOSE:To permit the safety of the whole of a system including a pipeline for a burner, by a method wherein the title combustion apparatus is provided with a combustion unit, which judges a signal from a safety checking unit having a pressure sensor by a control unit and permits burning only when a pressure is higher than a predetermined value, and a pipeline for exhausting, which is connected to an exhaust fan and is provided with a safety checking unit. CONSTITUTION:When a power source switch 7 is put ON, a control unit 19 outputs a signal, an outdoor solenoid valve 12 is closed, an indoor solenoid valve 13 is opened and, simultaneously, the operation of a fan 11 for exhausting is started. A pressure in the pipeline 14 for exhausting increases under this condition. The indoor solenoid valve 13 is closed by the control unit 19 and the fan 11 for exhausting is stopped simultaneously after the elapse of time T1. Further, the value of a pressure sensor 15 is read just after the elapse of time T2. When a pressure signal from the pressure sensor 15 is lower than cut-off, it is judged that there is a problem in the pipeline 14 for exhausting and that the pressure in the pipeline is reduced, therefore, the control unit 19 controls a system so that the operation of the title apparatus will never be shifted to the combustion of a burner.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a combustion device CC 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. While there are no problems and the indoor environment during heating is being reconsidered and is attracting attention, on the other hand, the occurrence of poisoning due to poor exhaust piping or construction errors remains the same.

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 and takes care of the equipment. 2 is wall 17
This is an intake pipe that penetrates through the air intake pipe and connects the outside air and the inside of the sealed instrument body 1B. 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 pipe 4. 6 is wall 1
This is an exhaust pipe that penetrates through the exhaust pipe 7 and connects the exhaust pipe 5 with the outside.

The operation of the FF heater configured as above will be explained 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 is sent to the combustion section 3 through the intake pipe 2. The heat generated in the combustion section 3 is used for heating. In addition, the exhaust gas after combustion passes through the exhaust fan 5 via the internal piping 4, and then
It is sent out to the outside through the exhaust pipe 6.

Problems to be Solved by the Invention However, with 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. In addition, 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-mentioned 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 interruption, the appliance is operated.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a power switch for controlling the appliance, a control section for receiving signals from the power switch and performing a safety check of the appliance and a combustion sequence; an exhaust fan that operates upon receiving a signal from the control section; an outdoor solenoid valve that shuts off outside air; an indoor solenoid valve that receives a signal from the control section and shuts off piping within the appliance; and the indoor solenoid valve and the a safety check section having a pressure sensor that detects pressure between the outdoor solenoid valve and transmits the detected pressure to the control section; and a safety check section that receives a signal from the safety check section.

a combustion section that burns in response to a signal from the control section only when the pressure based on the pressure determined by the control section is equal to or higher than a predetermined value; an intake pipe connecting the combustion section and the outside; and the combustion section. and an internal pipe connecting the exhaust fan to the exhaust fan, and an exhaust pipe connected to the exhaust fan and having the safety check section.

According to the above-described configuration, the present invention closes the outdoor solenoid valve in response to a signal from the control section, operates the exhaust fan, and closes the indoor solenoid valve after a certain period of time after turning on the power switch.

When a certain period of time has elapsed after the end of the above operation, the pressure in the pipe closed by the outdoor solenoid valve and the indoor solenoid valve, that is, the exhaust pipe, is detected by a pressure sensor and transmitted to the control section. The control unit determines the quality of the exhaust pipe based on the signal from the pressure sensor, and operates or stops the combustion sequence.

Therefore, the above operation makes it possible to detect defects or construction errors in the exhaust piping, thereby ensuring the safety of the system including the 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 a configuration diagram of an FF heater in an embodiment of the present invention. In FIG. 1, 7 is a power switch, which is used to protect the appliance.

Reference numeral 8 denotes an intake pipe that penetrates the wall 17 and connects the outside air to the inside of the closed-type appliance main body 1B. 9 is a combustion section. 10 is an internal pipe connected to the exhaust side of the combustion section 9. Reference numeral 11 denotes an exhaust fan connected to one end of the internal pipe 10, which exhausts exhaust gas generated in the combustion section 9 to the outside.

12 is an outdoor solenoid valve that shuts off outside air. Reference numeral 13 denotes an indoor solenoid valve that shuts off the piping 10 within the appliance main body 18. 1
Reference numeral 4 denotes an exhaust pipe that penetrates the wall 17 and has the outdoor solenoid valve 12 installed at the other end facing the outdoors, and the indoor solenoid valve 13 installed at one end inside the appliance body 18, and includes an exhaust fan 11. The one end is connected to the exhaust side of the. A pressure sensor 15 detects the pressure inside the exhaust pipe 14.

Reference numeral 16 denotes a safety check section, which includes an exhaust valve 11, an outdoor solenoid valve 12, an indoor solenoid valve 13, an exhaust pipe 14, and a pressure sensor 15, and detects abnormalities in the exhaust pipe 14. 19 is a control unit including a microcomputer, which includes an exhaust fan 11 and indoor and outdoor solenoid valves 12;
, 13, the pressure sensor 15, and the combustion part 9, and control the safety check of the appliance and the heating sequence, and have each part execute it.

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. The normal operation will be explained according to FIG.

When the power switch 7 is turned on, the control section 19 issues a signal,
When the outdoor solenoid valve 12 is closed and the indoor solenoid valve 13 is opened, the exhaust fan 11 starts operating. In this state, the pressure inside the exhaust pipe 14 increases. After the elapsed time T1, the indoor solenoid valve 13 is closed and the exhaust fan 11 is stopped at the same time.

The control unit 19 reads the value of the pressure sensor 15 when the elapsed time reaches T2 in the above state, and the pressure sensor 15
If the pressure signal from the controller is equal to or higher than the cutoff value, it is determined that there is no problem with the exhaust pipe 14, and the outdoor solenoid valve 12 and the indoor solenoid valve 13 are opened in response to a signal from the controller 19.

Furthermore, the combustion section 9 and the exhaust fan 11 are operated to perform a heating sequence.

Next, referring to FIG. 3, the operation at the time of abnormality will be explained.

When the power switch 7 is turned on, the control section 19 issues a signal,
When the outdoor solenoid valve 12 is closed and the indoor solenoid valve 13 is opened, the exhaust fan 11 starts operating. In this state, the pressure inside the exhaust pipe 14 increases. After the elapsed time T1, the controller 19 closes the indoor solenoid valve 13 and simultaneously stops the exhaust fan 11. In the above state, the control unit 1 determines the value of the pressure sensor 15 when the value is reached after an elapsed time T2.
If the pressure signal from the pressure sensor 15 is below the cutoff, it is determined that there is a problem in the exhaust pipe 14 and the pressure in the exhaust pipe 14 has decreased, and the transition to combustion is not performed. The control unit 19 controls so that there is no such occurrence.

As described above, according to this embodiment, there is a power switch that takes care of the appliance, a control section that receives a signal from the power switch and performs a safety check of the appliance and a heating sequence, and a control section that receives the signal from the control section and operates the control section. an exhaust fan that performs this, an outdoor solenoid valve that shuts off outside air, an indoor solenoid valve that receives a signal from the control section and shuts off piping inside the appliance, and a pressure between the indoor solenoid valve and the outdoor solenoid valve. a safety check section having a pressure sensor that detects and transmits the pressure sensor to the control section; a combustion section that judges a signal from the safety check section by the control section and burns in response to a signal from the control section based on the judgment; By providing an intake pipe that connects the combustion section and the outside, an internal pipe that connects the combustion section and the exhaust fan, and an exhaust pipe that has the safety check section, defects in the exhaust piping and construction errors are detected. This makes it possible to ensure the safety of the system including the FF heater and piping.

Effect of F94 ■ As described above, according to the present invention, an outdoor solenoid valve is installed in the exhaust pipe.
An indoor solenoid valve and a pressure sensor are installed, the pressure state in the exhaust pipe is detected by the pressure sensor, the signal from the pressure sensor is judged by the control unit, and if there is no problem with the pressure value in the exhaust pipe, the combustion sequence is started. By switching to the combustion sequence and stopping the transition to the combustion sequence if there is a problem, it is possible to discover construction errors in the exhaust piping or defects due to corrosion, etc., and prevent carbon monoxide poisoning caused by this. It is possible to prevent this and ensure the safety of not only the combustor but also the entire system including the piping.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an FF heater employing an embodiment of the present invention, Fig. 2 is an operation diagram when the exhaust piping shown in Fig. 1 is normal, and Fig. 3 is an illustration of the exhaust piping shown in Fig. 1. FIG. 4 is a block diagram of a conventional OFF heater. 11...Exhaust fan, 12...Outdoor solenoid valve, 13...Indoor solenoid valve, 14...
・Exhaust piping, 15...Taka sensor, 16...
... Safety check section, 19... Control section. Name of agent: Patent attorney Toshio Nakao and 1 other person7-
Power switch 8 - #L replacement piping - Combustion section 10 - Internal piping 11 - #To steam fan 12 - Outdoor magnetic valve I3 - Indoor valve / 4 - m shared piping /? -II Phloem Figure 2 Figure 3

Claims (1)

[Claims] A power switch that turns on and off the appliance, a control unit that receives a signal from the power switch and performs a safety check of the appliance and performs a combustion sequence, an exhaust fan that operates in response to a signal from the control unit, and shuts off outside air. an outdoor solenoid valve, an indoor solenoid valve that receives a signal from the control section and shuts off piping in the appliance, and a pressure that detects pressure between the indoor solenoid valve and the outdoor solenoid valve and transmits it to the control section. a safety check section having a sensor; a combustion section that determines a signal from the safety check section by the control section and performs combustion according to a signal from the control section only when the pressure based on the determination is equal to or higher than a predetermined value; Intake piping that connects the room and the outdoors,
A forced intake/exhaust type combustion device comprising an internal pipe connecting the combustion section and the exhaust fan, and an exhaust pipe having the safety check section.