JPH0639233Y2 - Compulsory supply / exhaust combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a forced supply / exhaust combustion device.

(Prior Art and Problem) Conventionally, as shown in FIG. 4 and FIG. 5, in a forced supply / exhaust combustion device in which a supply / exhaust pipe 11 having a double pipe structure is connected to the device, the supply / exhaust pipe is An exhaust pipe 10 is connected to an inner pipe (exhaust pipe) 11b of 11 and a supply cylinder 3 is connected to an outer pipe (air supply pipe) 11a.
Was connected to. In this structure, the high-temperature combustion exhaust discharged from the exhaust stack 10 to the atmosphere via the inner pipe 11b causes the air introduced into the supply cylinder 3 and the duct 8 to pass through between the inner pipe 11b and the outer pipe 11a. The duct 8 itself is heated to 100
It was a high temperature of about ℃. Therefore, when the electric component 20 such as the power supply board is arranged in the vicinity of the duct 8 (in particular, near the front surface of the duct 8), the electric component 20 is heated by the heat from the duct 8 and is adversely affected. It was a thing.

The present invention has been made in view of the above-mentioned drawbacks of the prior art. In a forced supply / exhaust type combustion appliance to which a dual pipe structure supply / exhaust pipe is connected, a power supply board or the like is provided near the air supply duct in the appliance. It is an object of the present invention to prevent the electric component from being heated to a high temperature even if the electric component is provided.

(Means for Solving the Problem) In order to achieve the above object, the forced supply / exhaust combustion device of the present invention comprises a device exterior provided with an opening for air supply, an air supply pipe and an exhaust pipe. A supply / exhaust pipe having a heavy pipe structure, and a duct that communicates with the air supply pipe and guides air to a fan, and in which electric parts such as a power supply board are arranged in the vicinity of the duct inside the appliance, An L-shaped bent plate is formed at a position of the duct facing the electric component, and a plurality of through holes are provided in the bent plate, and a connection port of the fan and the through hole are provided in the duct. In between, an air guide plate that guides the air sucked from the air supply pipe to the connection port without directly hitting the bent plate is provided, and an air passage can be formed between both ends of the air guide plate and the outer frame of the duct. It has a structure with a gap.

An embodiment of the present invention will be specifically described below with reference to the drawings.

(Embodiment) FIGS. 1 to 3 show an embodiment of the present invention.
1 is a front view showing the overall structure, FIG. 2 is a side view of the same, and FIG. 3 is a sectional view taken along the line AA of FIG. 2 showing the structure inside the duct 8.

In FIG. 1 and FIG. 2, reference numeral 1 is an instrument exterior, and 2 is a front plate forming the front surface of the instrument exterior 1.
5a is a heat exchanger for hot water supply, 5b is a heat exchanger for bath, a burner block 6 is connected below both heat exchangers 5a and 5b, and an exhaust gas for hot water supply is provided above the heat exchanger for hot water supply 5a. Collecting cylinder 4a
However, in addition, above the heat exchanger 5b for the bath, the exhaust stack 4b for the bath is provided.
Are connected. 7 is a fan, burner block 6
The combustion air is supplied to. Reference numeral 11 denotes a supply / exhaust pipe having a double pipe structure, which is composed of an outer cylinder 11a which is an air supply pipe and an inner pipe 11b which is an exhaust pipe. Reference numeral 3 denotes a supply cylinder, which is fixed to the appliance exterior 1 and is connected to the outer pipe 11a of the supply / exhaust pipe 11. An exhaust pipe 10 is connected to the inner pipe 11b, and is also connected to the hot water supply exhaust collecting pipe 4a and the bath exhaust collecting pipe 4b. Further, the supply cylinder 3 has a duct 8
The intake port of the fan 7 is connected to the lower side of the duct 8 via the fan supply cylinder 9.

Next, as shown in FIG. 3, an electric component 20 such as a power supply board is provided on the lower left side of the duct 8 in the drawing in the vicinity of the duct 8. An L-shaped bent plate 21 is formed at a position of the duct 8 facing the electric component 20, and the bent plate 21 is provided with a plurality of through holes 22. Reference numeral 25 is a connection port with the fan 7 to which the fan supply cylinder 9 is connected. In the duct 8, the outer pipe 11a is provided between the connection port 25 and the through hole 22.
An air guide plate 23 that guides the air sucked in from the fuel supply cylinder 3 to the connection port 25 is provided, and an air guide plate 24 that guides the air to the connection port 25 is also provided on the right side of the connection port 25 in the drawing. There is. Both ends of the air guide plates 23, 24 and the outer frame of the duct 8
The gaps a to d that can serve as air passages are provided between the air gap 8a and 8a. Further, at the lower part of the front plate 2, there are provided an air supply opening 30 for taking the outside air into the device, and a guide plate 31 for guiding the air taken in from the opening 30 to the electric component 20.

Next, the operation of the above configuration will be described. When the fan 7 is driven, combustion air flows from the outer pipe 11a of the supply / exhaust pipe 11 through the supply cylinder 3 into the duct 8 and is sucked into the fan 7. On the other hand, the air discharged from the fan 7 contributes to combustion in the burner block 6 and is heat-exchanged, and then flows into the exhaust pipe 10 from the hot water supply exhaust collecting pipe 4a or the bath exhaust collecting pipe 4b to supply and exhaust pipes. It is discharged through the inner pipe 11b of 11.

The air flowing into the duct 8 is heated by the high temperature exhaust gas inside the inner pipe 11b when passing through the outer pipe 11a, and has a high temperature of about 100 ° C. The hot air flows downward in the duct 8 and is guided to the connection port 25 along the air guide plates 23 and 24.
Therefore, the high temperature air rarely directly hits the bent plate 21, and the temperature rise of the duct 8 located around the through hole 22 (below the air guide plate 23) can be suppressed. Therefore, the duct 8
The amount of heat radiated from the electric component 20 to the electric component 20 is reduced, and the temperature rise of the electric component 20 can be suppressed.

Further, the supply of the combustion air to the fan 7 is also performed from the opening 30 of the front plate 2. That is, as shown by the arrow in FIG. 2, the outside air taken in through the opening 30 passes through the lower portion of the device and enters the duct 8 through the through hole 22, and the gaps a and c at both ends of the air guide plate 23 and the air guide plate 23 are introduced. It is sucked into the fan 7 from the connection port 25 through the gaps b and d at both ends of the plate 24.
The electric component 20 is cooled by the outside air flowing through the lower part of the device as described above, so that the temperature rise of the electric component 20 can be further suppressed. In addition, in the above embodiment, the two air guide plates 23 and 24 are provided in the duct 8.
The air guide plate 24 on the opposite side of the through hole 22 of 25 is not always necessary.

(Effects of the Invention) As is apparent from the embodiments described above, the compulsory air supply / exhaust combustion device of the present invention has a double pipe structure including an instrument exterior having an opening for air supply and an air supply pipe and an exhaust pipe. An air supply / exhaust pipe, and a duct communicating with the air supply pipe to guide air to a fan,
In a device in which an electric component such as a power supply board is arranged in the vicinity of the duct inside the device, the position of the duct facing the electric component is formed by an L-shaped bending plate, and a plurality of the bending plates are provided. In addition to providing individual through holes, air introduced into the duct between the fan connection port and the through hole without directly contacting the bent plate with the air sucked from the air supply pipe. Since a guide plate is provided and a gap that can serve as an air passage is provided between both ends of the air guide plate and the outer frame of the duct, the high temperature air flowing into the duct from the air supply pipe is guided by the air guide plate. Lead to the connection,
The temperature rise of the duct near the through hole can be suppressed, and the temperature rise of the electric component can be suppressed while facilitating the accommodation of the electric component. Further, by sucking air into the duct from the air supply opening provided on the exterior of the appliance through the through hole, the electric component can be cooled and the temperature rise of the electric component can be further suppressed.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention,
1 is a front view showing the overall structure, FIG. 2 is a side view of the same, and FIG. 3 is a sectional view taken along the line AA of FIG. FIG. 4 is a front view showing the overall configuration of a conventional example, and FIG. 5 is a side view of the same. 1 …… Apparatus exterior 7 …… Fan 8 …… Duct 11 …… Supply / Exhaust pipe 11a …… Outer pipe (Supply pipe) 11b …… Inner pipe (Exhaust pipe) 20 …… Electrical parts 22 …… Through hole 23 …… Air guide plate 25 ... Connection port

Claims (1)

[Scope of utility model registration request] 1. An instrument exterior provided with an opening for air supply, a supply / exhaust pipe having a double pipe structure composed of an air supply pipe and an exhaust pipe, and a duct communicating with the air supply pipe for guiding air to a fan. Prepare,
In a device in which an electric component such as a power supply board is arranged in the vicinity of the duct, the position of the duct facing the electric component is formed by an L-shaped bending plate, and a plurality of the bending plates are provided. In addition to providing individual through holes, the air sucked from the air supply pipe is guided to the connection port in the duct between the connection port with the fan and the through hole without directly contacting the bent plate. A compulsory air supply / exhaust combustion device, characterized in that an air guide plate is provided and a gap that can serve as an air passage is provided between both ends of the air guide plate and the outer frame of the duct.