JPH073152Y2 - Compulsory supply / exhaust combustion equipment - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> This invention burns with combustion air sucked from the outside and exchanges heat with the load of indoor air or water due to this combustion to heat indoors or supply hot water. This is related to a combustion appliance commonly called FF type, in which exhaust gas after heat exchange is exhausted to the outside again.

<Prior Art> Conventionally, in this type of combustion appliance, for example, in Japanese Utility Model Publication 58-27255
As disclosed in the publication, an electric closed circuit is formed by an exhaust pipe, an air supply pipe, and an air supply / exhaust pipe to allow a current to flow, thereby detecting disconnection of the exhaust pipe and automatically stopping combustion. Thus, the exhaust gas is prevented from being released into the room, and the danger of indoor air pollution and carbon monoxide poisoning is prevented.

<Problems to be solved by the device> However, in order to obtain general versatility of the supply / exhaust pipe, in this conventional device, the supply port and the exhaust port are respectively located on different sides of the terminal part of the supply / exhaust pipe. Two exhaust ports and two air supply pipes are not connected, and an exhaust port cap and an air supply port cap are attached to the remaining exhaust port and air supply port, respectively. Therefore, this exhaust port cap is removed. In this case, the exhaust pipe disconnection detection due to the weak current does not work, and a large amount of exhaust gas is discharged into the room, resulting in an extremely dangerous state.

<Means for Solving Problems> In order to solve the above-mentioned drawbacks by paying attention to this point, the present invention has a structure having a plurality of exhaust ports and air supply ports which penetrate a wall and project one end to the outside. An exhaust pipe and an air supply pipe of the instrument body are connected to the air supply and exhaust pipe, and a weak current is passed between the air supply and exhaust pipe and the exhaust pipe to detect disconnection of the exhaust pipe. The other exhaust port to which the exhaust pipe of the air supply / exhaust pipe is not connected is closed by an exhaust port cap, and the exhaust port cap is fixed to the exhaust port via a lead wire terminal by a detachable fixing means. The exhaust pipe and the exhaust pipe are electrically connected.

<Operation> The air supply / exhaust pipe 1 and the exhaust pipe 10 and the air supply pipe 12 protruding from the instrument body 9 are optimally connected according to the installation conditions, and the air supply port 8 and the air exhaust port 7 remaining in the air supply / exhaust pipe 1 are optimally connected. The air supply port cap 22 and the exhaust port cap 17 are attached to each of them, and the fixing means 20 for fixing the exhaust port cap 17 to the exhaust port 7 is used to detect a disconnection lead wire 15
Since the terminal 21 of is also connected to the supply / exhaust pipe 1 at the same time, it flows from the supply / exhaust pipe 1 to the combustion control circuit 29 of the instrument body 9 through the exhaust pipe 10 and returns to the supply / exhaust pipe 1 again. Therefore, if the connection between the supply / exhaust pipe 1 and the exhaust pipe 10 is disconnected for some reason, it is possible to immediately detect this disconnection and stop combustion as in the conventional case to measure safety. Of course, in the present invention, since the terminal 21 of the lead wire 15 for flowing a weak current to the air supply / exhaust pipe 1 is connected by using the fixing means 20 for fixing the exhaust port cap 17, the exhaust port cap 17
If you forget to install or disconnect the lead wire 15, the lead wire 15 will also become unconnectable, so like the disconnection detection, combustion will not start or stop, and the exhaust port cap that could not be done before
Even if it comes off, it always operates on the safe side, and it is possible to reliably prevent the dangerous state of exhaust gas being released into the room.

<Embodiment> Next, the forced air supply / exhaust type combustion apparatus according to the present invention will be described with reference to the heater shown in the drawings as an embodiment.

1 is a through hole 3 formed in a wall 2 that divides the room from the outdoors
Is a metal supply / exhaust pipe that penetrates through, and has a double-pipe structure in which the inside is an exhaust part and the outside is an air supply part, and the tip part located outdoors communicates with the exhaust part. The discharge hole 4 is formed, and the air supply hole 5 communicating with the air supply unit is also formed in the intermediate portion on the outdoor side.

Reference numeral 6 denotes a terminal portion that constitutes the indoor side of the air supply / exhaust cylinder 1, and has two exhaust ports 7 communicating with the air supply unit and two air supply ports 8 communicating with the air supply unit, respectively, in order to obtain versatility of piping. Prepared on the side.

Reference numeral 9 denotes an instrument main body having a metal exhaust pipe 10 connected to the exhaust port 7 of the air supply / exhaust pipe 1 and an air supply pipe 12 connected to the air supply port 8 via a flexible connecting pipe 11 on the back surface, It burns with the outdoor air sucked through the air supply / exhaust pipe 1, releases the combustion heat as hot air from the front outlet 13 by heat exchange, and the exhaust gas after heat exchange is again passed through the air supply / exhaust pipe 1. This is a forced air supply / exhaust type heating that discharges to the outside.

Reference numeral 14 denotes a combustion circuit, which is provided in the instrument body 9 and is composed of a printed circuit board or the like. In addition to flowing a weak current that does not affect the above, the exhaust pipe 10 is also connected via a lead wire 16 to enable combustion by energization by the connection between the supply / exhaust pipe 1 and the exhaust pipe 10.

Reference numeral 17 denotes a metal-made concave exhaust port cap that is attached so as to close the remaining exhaust port 7 which is not connected to the exhaust pipe 10, and the exhaust port 7 has a large diameter fool formed in the exhaust port 7. Hole 18
Is fixed by a fixing means 20 formed of a screw penetrating through and screwed into the threaded portion 19 of the exhaust port cap 17,
The fixing of the exhaust port cap 17 by the fixing means 20 is used to connect the terminal 21 of the lead wire 15 to the terminal portion 6, that is, the exhaust port 7 is a stupid hole 18. Therefore, if the exhaust port cap 17 is not provided, the lead wire 15 cannot be connected by the fixing means 20, and therefore the detachment of the exhaust port cap 17 can be detected by the conventional detachment detecting device of the exhaust pipe 10. Is.

Reference numeral 22 is a rubber-made air supply port cap which is attached so as to close the air supply port 8 which is not connected to the air supply pipe 12 and remains.

Next, the combustion circuit 14 will be described in detail with reference to the electric circuit diagram shown in FIG.
And a drive circuit 25 composed of a solenoid valve, a combustion fan, an igniter, a hot air fan, or the like via a relay contact a, and a rectifying stack 26 and a capacitor 27 are connected to the transformer 24 to form a DC weak current circuit. Combustion control circuit 29, which is composed of a microcomputer or the like, which constitutes 28, and controls combustion by drive control of drive circuit 25 is controlled by this weak current circuit 28, and this combustion control circuit 29 is supplied to exhaust pipe 1 and exhaust pipe. The energization of a weak current due to the connection with 10 is detected to control the energization of the relay 30 having the normally open relay contact a.

Next, the operation of this embodiment will be described.

The exhaust pipe 7 and the air supply port 8 of the air supply / exhaust pipe 1 that are optimal for the installation conditions are connected to the exhaust pipe 10 and the air supply pipe 12 of the instrument body 9, and the remaining air supply port 8 is connected to the air supply port. After the cap 22 is attached and the exhaust port cap 17 is fixed to the remaining exhaust port 7 together with the terminal 21 of the lead wire 15 by the fixing means 20, the through hole 3 in which the tip of the air supply / exhaust tube 1 is formed on the wall 2 is formed. The equipment set is completed by projecting it to the outside through the lead wire, and the connection between the exhaust port 7 and the exhaust pipe 10 leads to the lead wire.
A weak current flowing through the supply / exhaust pipe 1 via 15 flows into the combustion control circuit 29 via the exhaust pipe 10, whereby the combustion control circuit 29
Detects the connection between the supply / exhaust pipe 1 and the exhaust pipe 10, energizes the relay 30, and closes the relay contact a that controls the energization of the drive circuit 25, so the power switch (not shown) is closed. If done, the combustion will start smoothly, and the outdoor air sucked through the air supply / exhaust pipe 1 will burn, and the exhaust gas after heat exchange after combustion will be exhausted again through the air supply / exhaust pipe 1 to the outside. The indoor heating can be performed without polluting the indoor air.

Next, when the connection between the supply / exhaust pipe 1 and the exhaust pipe 10 is disconnected for some reason, a weak current does not flow to the combustion control circuit 29 through the exhaust pipe 10, so that the combustion control circuit Since the energization of the relay 30 by 29 is stopped, the relay contact a is opened, and the energization of the drive circuit 25 is stopped, the combustion is instantaneously stopped during the combustion, and the power switch is closed when the combustion is stopped. Even if it does not become a combustion start state, the indoor discharge of exhaust gas due to disconnection of the supply and exhaust pipe 1 and the exhaust pipe 10 is reliably prevented, and a dangerous state such as indoor pollution, abnormal combustion, or carbon monoxide poisoning is caused. It can be avoided.

If the exhaust cap 17 is forgotten to be attached from the beginning or if the connection is disconnected, the lead wire 15 cannot be connected to the air supply / exhaust cylinder 1, or the connection will be disconnected. Like the disconnection of the exhaust pipe 10, the flow of the weak current disappears, and combustion is not started during combustion stop,
Further, when the combustion is in progress, the combustion is stopped, and it is possible to reliably detect the removal or forgetting to attach the exhaust port cap 17 that could not be detected by the conventional disconnection detection of the exhaust pipe 10, and the same dangerous condition as the removal of the exhaust pipe 10 is detected. It can be prevented in advance and is extremely safe.

Further, the conventional air supply / exhaust cylinder 1 has two exhaust ports 7 and two air intake ports 8 respectively, and it has the convenience of having the versatility of the piping for supply / exhaust as it is, thus improving the safety. It was something that could be measured.

<Effect of device> This device detects discharge of exhaust gas into the room by detecting a disconnection of the exhaust pipe and stopping combustion by passing a weak current between the supply / exhaust pipe and the exhaust pipe. To prevent
In addition to avoiding dangerous conditions such as indoor pollution, abnormal combustion, and carbon monoxide poisoning, the lead wire terminals that flow a weak current to the supply / exhaust pipe are attached to the exhaust port remaining in the supply / exhaust pipe. Since it is connected with the exhaust port cap by the fixing means for fixing the port cap, it becomes possible to detect the forgetting to attach the exhaust port cap or the detachment which could not be detected in the past, and it is extremely safe. The convenience of the supply / exhaust pipe, which is the versatility of the supply / exhaust pipe, has a great effect in that the safety is further improved, and the configuration also needs to be a special configuration for terminal connection. Instead, it can be performed by using the fixing means for attaching the exhaust port cap, so that the practical effect is great, such as the simple configuration, the small number of parts, and the inexpensive provision. Than it is.

[Brief description of drawings]

FIG. 1 is an explanatory view of a heating apparatus to which an embodiment of the present invention is attached, FIG. 2 is an electric circuit diagram of the same portion, FIG. 3 is an exploded perspective view of the same portion, and FIG. Enlarged sectional view. 1 ... Air supply / exhaust tube, 2 ... Wall, 7 ... Exhaust port, 9 ... Instrument body, 10 ... Exhaust pipe, 12 ... Air supply pipe, 15 ... Lead wire,
17 …… Exhaust port cap, 20 …… Fixing means, 21 …… Terminal.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yuji Jimbo 7-7 Higashishinbo, Sanjo City, Niigata Prefecture Uchida Manufacturing Co., Ltd. (72) Minoru Nakano 7-7 Higashishinbo, Sanjo City, Niigata Prefecture Uchida Manufacturing Co., Ltd. Internal Examiner Hitoshi Maeda (56) References: Kaihei Hei 1-151050 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An instrument main body 9 is attached to an air supply / exhaust cylinder 1 which has a plurality of exhaust ports 7 and an air supply port 8 and which penetrates a wall 2 and projects one end to the outside.
The exhaust pipe 10 and the air supply pipe 12 are connected, and a weak current is passed between the air supply and exhaust pipe 1 and the exhaust pipe 10 to detect the disconnection of the exhaust pipe 10. The other exhaust port 7 to which the exhaust pipe 10 of the air supply / exhaust pipe 1 is not connected is closed by an exhaust port cap 17, and the exhaust port cap 17 is attached by a detachable fixing means 20 via a terminal 21 of the lead wire 15 to the exhaust port. 7
A compulsory air supply / exhaust combustion device, characterized in that the air supply / exhaust pipe 1 and the exhaust pipe 10 are electrically connected to each other.