JPH0351620A - Safety device of combustion device - Google Patents

Abstract

PURPOSE:To prevent the pollution of the inside of a room by providing the exhaust gas cylinder of a combustion device coaxially with a supply air cylinder provided in the ceiling section of a storage box to store the combustion device with the exhaust gas cylinder projecting and being received in a baffler and dividing the space between the baffler and the supply air cylinder to form a backward wind flow-out section and a supply air section. CONSTITUTION:When a back flow develops in the exhaust gas, it flows out from a backward wind flow-out section 9 and goes into a box body 2 from a supply air section 10 with the combustion air by the draft action in an exhaust gas cylinder 5. Accordingly in the combustion air the oxygen concentration is diluted by the exhaust gas so that a pilot burner 12 is put off right away and a solenoid valve 13 closes and the combustion stops. With this constitution it is possible to prevent the pollution of the inside of a room and raise safety.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a safety device for combustion appliances.

(Prior Art and Problems) There are various causes of backflow of exhaust gas, and one of them is the sealing of the house. That is, with the development of sashes and the like, houses have become hermetically sealed, and if a combustion appliance such as that shown in FIG. 1 is used in such a sealed state, there is a risk that exhaust gas may flow back into the room from the exhaust stack. For example, by enclosing a ventilation fan in a kitchen or the like, a negative pressure is created in the room, and exhaust gas flows back into the room and contaminates the room. In such a case, the present invention immediately and automatically stops combustion in the combustion appliance, thereby preventing pollution from indoor exhaust gas.

(Construction of the Invention) Reference numeral 1 is a combustion appliance, and 2 is a box housing the combustion appliance 1. A supply cylinder 4 is provided on the ceiling 3 of the box body 1, and an exhaust pipe 5 of a combustion appliance l is housed coaxially with the supply pipe 4 with its upper part protruding. is inserted into the baffler 6, a gap 7 is provided between the feed cylinder 4 and the baffle 6, and an exhaust pipe 5 is positioned in the gap 7.
A partition member 8 is installed in the air, the upper part of the partition member 8 is configured as a backflow outflow part 9, and the lower part of the partition member 8 is configured as an air supply part 10. Reference numeral II indicates a baffle plate.

(Function) Figure 2 (A) shows a normal wandering state. At this time, air is flowing in from the headwind outflow section 9. The case of FIG. 2(B) shows a case where backflow occurs. Second
In the case of figure (B), when a backflow occurs as shown by the arrow in the figure, the exhaust gas flows out from the backflow outflow section 9, but since a draft is acting on the exhaust pipe 5, the exhaust gas flows out from the air supply section. 10 flows into the box body 2 together with combustion air. Thus, the oxygen concentration of the combustion air is diluted by the exhaust gas, and the pie mouth soto burner 12 is immediately extinguished. Therefore, the thermocasople ceases to work, the solenoid valve l3 is closed, and the main burner 14 is extinguished. In this way, the combustion appliance (2) is housed in the box body 2, the air supply cylinder 4 is provided on the ceiling part 3 of the box body 2, and the back wind outflow part 9 and the air supply part IO are provided above and below the partition member 8. Even if a headwind occurs due to the structure or the like, the supply of fuel gas can be immediately stopped.

(Effects of the Invention) As described above, the present invention employs a unique configuration in which even if backflow occurs in exhaust gas, it is guided to the combustion appliance together with combustion air and the fuel gas is stopped by dilution air. It has an excellent effect of preventing air pollution. In particular, since the supply section is located at a high position, the greatest advantage is that contamination of the room by exhaust gas can be detected and extinguished before it affects the human body.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a conventional device, and FIGS. 2(A) and (B) are explanatory diagrams of the present invention. Code 1... Combustion appliance, 2... Box body, 3... Ceiling part, 4... Supply cylinder, 5... Exhaust pipe, 6... Baffler,
7... Spacing part, 8... Partition member, 9... Back wind outflow part, 10... Air supply part, 11... Baffle plate, 12...
Pilot burner, ■3... Solenoid valve, l4... Main burner.

Claims (1)

[Claims] A supply cylinder is provided on the ceiling of the box housing the combustion equipment, and the exhaust pipe of the combustion equipment is housed coaxially with the supply cylinder with its upper part protruding, and the tip of the exhaust pipe is placed inside the baffle. A space is provided between the feed cylinder and the baffler, and a partition member is installed in the exhaust pipe located in the space, and the upper part of the partition member is configured as a backflow outflow part. A safety device for combustion appliances in which the air supply section is located below the partition member.