JPH0886433A - Gas discharging device for combustion equipment - Google Patents

Abstract

PURPOSE: To prevent accident caused by flowing-in of discharged gas into a room and inform a time of repairing operation or a replacement operation for a discharging cylinder by a method wherein a leakage of the discharged gas is detected under a utilization of an electrical shutter and a fan and an alarm is produced. CONSTITUTION: In the case that a combustion equipment 1 is newly installed, or repaired, a reading-out value of a pressure gauge 8 during rotation of a fan 4 when an electrical shutter 7 is closed is stored in a memory as an initial value PO during the case that an operation is carried out. When an operation of the combustion equipment is started every time, a control device 9 measures automatically an increased value of a pressure P caused under a rotation of the fan 4 when the electrical shutter 7 is closed, compares the increased value with the initial value PO and if the pressure P is decreased, it detects an occurrence of leakage of discharged gas caused by certain causes such as a removal of a discharging cylinder 3 or its corrosion and the like and then generates an alarm. With such an arrangement as above, it is possible to inform a time of performing a repairing operation for the discharging cylinder 3 or its replacing operation as well as to prevent occurrence of accident caused by flowing-in of the discharged gas into a room.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust device for combustion equipment installed indoors.

[0002]

2. Description of the Related Art Generally, exhaust gas from indoor-installed combustion equipment is designed to be discharged to the outside through an exhaust stack. However, when the area of a building is large or in an apartment house, the exhaust stack is the equipment installation room. There is a case where it is led to the outdoors through the kitchen or bathroom. In such a case, if the exhaust stack is removed in the middle or if there is a corrosion hole in the exhaust stack,
Exhaust gas may flow into the room from there, causing a serious accident. On the other hand, when the combustion equipment is stopped,
In order to prevent the invasion of leaves and dust into the exhaust stack from the outside, an electric shutter has been developed at the outlet of the exhaust stack and is controlled to be opened and closed by the control device of the combustion device.

[0003]

Therefore, the present invention utilizes an electric shutter for preventing dust and the like from entering the exhaust stack when combustion equipment is stopped, and a fan for supplying combustion air to the burner. Detects disconnection due to vibrations and shocks at the connecting portion of the exhaust stack, and detects damage due to rust and corrosion of the exhaust stack to prevent the occurrence of serious accidents due to leakage of exhaust gas, as well as the timing of repair or replacement of the exhaust stack. The purpose is to provide a means by which announcements can be made.

[0004]

As shown in FIG. 1, an exhaust device for a combustion device according to the present invention has an exhaust pipe 3 connected to an exhaust port 2 of an indoor-installed combustion device 1 for supplying combustion air. The exhaust gas generated by the burner 5 is transferred to the exhaust stack 3 by the fan 4.
In an exhaust device of a combustion device which is designed to be discharged to the outside through a fan, an electric shutter 7 is provided at an outlet 6 of an exhaust pipe 3, and a pressure gauge 8 is provided near the exhaust port 2 so that the fan is closed when the electric shutter 7 is closed. 4 is stored, and the fan 4 is rotated with the electric shutter 7 closed before the burner 5 is ignited at the start of the operation of the combustion device 1 and the pressure at that time is stored in advance. Compared with the above value, means 9 for issuing an alarm when the difference is a certain value or more is provided.

[0005]

When the apparatus of the present invention is newly installed or repaired, the reading of the pressure gauge 8 when the electric shutter 7 is closed and the fan 4 rotates when the electric shutter 7 is closed is set as an initial value P0 (automatic or Remember it manually. At the start of each operation, the control device 9 automatically measures the increase in the pressure P due to the rotation of the fan 4 when the electric shutter 7 is closed, and compares this with the initial value P0. In addition, an alarm is issued by detecting that the exhaust gas has leaked out due to some cause such as detachment or corrosion of the exhaust stack 3.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of an exhaust system for a combustion device according to the present invention. An indoor installation type combustion device 1 such as a gas water heater has a burner 5 for heating a heat exchanger 10 therein. ,
A fan 4 for supplying combustion air to the burner 5 and the like are provided, and an exhaust port 2 for exhausting exhaust gas generated in the burner 5 is provided in the upper part of the device body 1. Burner 5
At the time of combustion, the exhaust gas is exhausted to the outside by the fan 4 through the exhaust pipe 3 connected to the exhaust port 2. After the combustion is stopped, the electric power is provided at the outlet 6 of the exhaust pipe 3. The shutter 7 is closed to prevent dust and the like from entering from the outside. A pressure gauge 8 is provided near the exhaust port 2 of the device body 1, that is, near the inlet of the exhaust stack 3. The pressure gauge 8 measures the pressure in the exhaust stack 3,
It is designed to be sent to the control device 9.

As shown in FIG. 2, the control device 9 includes a CPU.
11, a memory 12, an input / output unit 13, a temperature controller 14, etc., the power is turned on, and the operation panel 15
When the operation start signal is received from, the electric shutter 7 is first closed (if it is opened) and then the rotation of the fan 4 is started, as shown in the flowchart of FIG. Next, the measured value P of the pressure gauge 8 is read and compared with the initial set value P0. When the difference .DELTA.P is below a certain value, the electric shutter 7 is opened and then the burner 5 is ignited. Further, when ΔP is a certain value or more, that is, even if the fan 4 is rotated, the exhaust stack 3
If the internal pressure does not rise to the set value, the fan 4 is stopped and an alarm is issued. The initial setting value P0 is set by performing a trial run once when the equipment is newly installed or repaired.
The pressure when the fan 4 is rotated after the electric shutter 7 is closed can be automatically or manually stored in the memory 12.

[0009]

According to the present invention, as described above, the combustion air is supplied to the electric shutter 7 and the burner 5 for preventing the entry of dust and the like into the exhaust stack 3 when the operation of the combustion equipment is stopped. Using the fan 4 for the purpose of detecting the disengagement of the fitting part due to the vibration of the connecting portion of the exhaust pipe 3 and the leakage of exhaust gas from the hole due to the rust and corrosion of the exhaust pipe 3, a warning is issued. Therefore, there is an advantage that a serious accident due to the inflow of exhaust gas into the room can be prevented and the time for repair or replacement of the exhaust stack 3 can be notified.

[Brief description of drawings]

FIG. 1 is a system diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of an essential part of the above.

FIG. 3 is a flowchart illustrating the same operation.

[Explanation of symbols]

 1 Combustion Equipment 2 Exhaust Port 3 Exhaust Cylinder 4 Fan 5 Burner 6 Exhaust Cylinder Outlet 7 Electric Shutter 8 Pressure Gauge 9 Controller 10 Heat Exchanger 11 CPU 12 Memory 13 Input / Output Unit 14 Temperature Controller 15 Control Panel

Claims (1)

[Claims] 1. Exhaust gas of a combustion device in which an exhaust pipe is connected to an exhaust port of an indoor-installed combustion device, and a fan for supplying combustion air exhausts exhaust gas generated by a burner to the outside through the exhaust pipe. In the device, an electric shutter is provided at the outlet of the exhaust pipe, a pressure gauge is provided near the exhaust port, and the pressure when the fan is rotated when the electric shutter is closed is stored in advance to start the operation of the combustion device. Before combustion of the burner, the fan is rotated with the electric shutter closed, the pressure at that time is compared with a previously stored value, and a means for issuing an alarm when the difference is a certain value or more is provided. Equipment exhaust system.