JPH03122416A - Complex combustion device - Google Patents

Abstract

PURPOSE:To provide a stable combustion during a concurrent utilization of a hot water feeding combustion device and a heating combustion device by a method wherein a cylinder for metering discharged gas is arranged at a discharging port of at least one of the combustion devices in a complex combustion device for storing both combustion devices in a common box. CONSTITUTION:A large discharging port of a hot water feeding large combustion device 2 is connected to a connection adapter 14 through a cylindrical guide duct 15 having a rectangular section. In turn, a small discharging port of a small-sized combustion device 3 to be used in an additional combustion for a bath device has a cylinder 16 formed to have a small section to show a throat shape so as to meter discharged gas and then the discharging port is connected to a discharging complex 11. with such an arrangement, the large and small combustion devices 2 and 3 are concurrently used. Even if a pressure within the discharging complex 11 is increased, the discharged gas of the small combustion device 3 is metered at the cylinder part 16, resulting in that a flow speed is increased and a smooth discharging of the gas is attained. Accordingly, a stable combustion is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a combined combustion device having two combustion devices inside.

[Prior Art] For example, there is a composite combustion device in which a combustion device for a water heater and a combustion device for a heater are housed in one box.

Depending on the conditions of use, this combined combustion device may be installed indoors or may be fitted with an extension duct for the purpose of guiding exhaust gas outdoors or to a remote location, such as in the hallway of an apartment complex. In this case, an exhaust assembly is attached to the two exhaust ports to combine the exhaust gases discharged from the two exhaust ports into one, and an extension duct is connected to this exhaust assembly.

[Problems to be Solved by the Invention] In a combined combustion device equipped with this exhaust assembly, when two combustion devices perform combustion at the same time, the exhaust pressure of the exhaust gas discharged by one combustion device causes the combustion of the other combustion device to increase. The problem is that the combustion state of the device is affected and combustion becomes unstable.
There was C.

The present invention has been made in view of the above circumstances, and its purpose is to provide a composite combustion device in which the combustion state is stable even when two combustion devices are used at the same time.

When the gas flows at high speed, exhaust is performed smoothly even if the pressure outside the combustion device changes.

[Means for Solving the Problems] In order to achieve the above object, the combined combustion apparatus of the present invention employs the following technical means.

The combined combustion device includes two combustion devices each equipped with a blower that sends combustion air to the combustion section. The combined combustion device also includes an exhaust assembly that is connected to the exhaust ports of the two combustion devices, collects exhaust gas discharged from the exhaust ports of the two combustion devices, and guides the exhaust gas to an extension duct. .

At least one of the exhaust ports of the two combustion devices includes a cylindrical portion that throttles the exhaust gas to be discharged.

[Function] By providing a cylindrical part with a throttling effect at the exhaust port,
Exhaust gas discharged from the exhaust port flows at high speed over a predetermined length. Exhaust gas has a predetermined length [Effects of the Invention] As shown in the above operation, the combustion device provided with the cylindrical part allows smooth exhausting even if the pressure inside the exhaust assembly changes. Therefore, even if two combustion devices operate simultaneously,
A combustion device including a cylindrical portion has a stable combustion state.

[Example] Next, a composite combustion apparatus of the present invention will be described based on an example shown in the drawings.

(Configuration of Example) FIG. 1 shows a perspective view of the main parts of a combined combustion device, and FIG. 3 shows a schematic diagram of the combined combustion device.

The combined combustion device 1 of this embodiment combines a gas combustion device (large combustion device) 2 with a large combustion capacity and a gas combustion device (small combustion device) 3 with a small combustion capacity, and is installed inside one box body 4. It is stored.

The large combustion device 2 is a combustion device for hot water supply, and stirs the combustion air and gas (fuel) sent by the blower 5.
It is equipped with a large combustion part 7 of the full-order type that is forcedly burnt by a burner 6.

In addition, the small combustion device 3 is a combustion device for reheating a bath or heating water for hot water heating, for example. It is equipped with a Bunsen-type small combustion section 10 that supplies .

The composite combustion section W1 is attached with an extension duct (not shown) for extending exhaust gas discharged from the large combustion device 2 or the small combustion device 3. And composite combustion device 1
is equipped with an exhaust assembly 11 for guiding exhaust gases discharged from the large combustion device 2 and the small combustion device 3 to an extension duct. This exhaust assembly 11 covers a large exhaust port 12 that discharges exhaust gas from the large combustion device 2 and a small exhaust port 13 that discharges exhaust gas from the small combustion device 3, and covers the large exhaust port 12 and the small exhaust port 13.
This is to guide the exhaust gas that is discharged further into the extension duct. The exhaust assembly 11 is provided with a connection adapter 14 for guiding the exhaust gas guided inside to the extension duct, and the extension duct is connected to the connection adapter 14.

The large exhaust port 12 of the large combustion device 2 is provided with a guide duct 15 for smoothly guiding the exhaust gas blown out from the large exhaust port 12 into the extension duct. The guide duct 15 is a cylindrical body with a square cross section, and is bent into a substantially S-shape so as to guide the exhaust gas blown out from the large exhaust port 12 to the connection adapter 14.

The small exhaust port 13 of the small combustion device 3 is provided with a cylindrical portion 16 (see FIG. 2) according to the present invention.

This cylindrical portion 16 is provided to protrude into the exhaust assembly 11 from the small exhaust port 13. The cylindrical part 16 has a small exhaust port 1
The cylindrical portion 16 of this embodiment is a cylindrical body with a rectangular cross section that throttles the exhaust gas discharged from the exhaust gas.

Note that the small combustion device 3 is provided with the cylindrical portion 16 that throttles the exhaust gas discharged to the small exhaust port 13, making it difficult to discharge the exhaust gas. Therefore, the rotational speed of the blower 9 is increased to prevent a decrease in the amount of combustion air supplied.

(Operation of Example) Next, the operation when the large combustion device 2 and the small combustion device 3 are used at the same time will be briefly described.

Since the large combustion device 2 is a full-order type gas combustion device with a large combustion capacity, the exhaust pressure of the exhaust gas discharged from the large exhaust port 12 is high. The pressure increases due to the exhaust gas discharged from 12.

In this state, the small combustion device 3 operates. In the conventional combustion engine without the cylindrical portion 16, when the pressure inside the exhaust assembly 11 becomes high, the exhaust from the small combustion device 3 is obstructed, and the combustion state becomes unstable. However, the cylindrical portion 16 is located at the small exhaust port 13.
By providing this, the combustion state of the small combustion device 3 was stabilized. This is because when the flow of exhaust gas discharged from the small exhaust port 13 flows through the cylindrical portion 16, a portion where the flow velocity is high is formed by the cylindrical portion 16 over a predetermined length. Therefore, even if the pressure in the exhaust assembly 11 becomes high, the small combustion device 3 can be smoothly exhausted.

Note that by forming the cylindrical portion 16 into a throat shape, the exhaust gas discharged from the small exhaust port 13 is smoothly throttled, and the flow velocity can be smoothly increased.

(Effects of Example) By providing the cylindrical portion 16 at the small exhaust port 13, the combustion state of the small combustion device 3 is less affected by the operation of the large combustion device 2, and the combustion state is stabilized.

In addition, by stabilizing the combustion state of the small combustion device 3,
The generation of noise by the small combustion device 3 can also be suppressed by 11%.

In addition, since the large combustion device 2 has a large combustion capacity, it discharges a large amount of exhaust gas from the large exhaust port 12 at high speed. Therefore, the large combustion device 2 is hardly affected by the small emissions of the small combustion device 3.

Moreover, the exhaust gas discharged from the large exhaust port 12 is smoothly guided into the extension duct by the guide duct 15.

This suppresses turbulence in the pressure within the exhaust assembly 11 and suppresses the influence on the combustion state of the small combustion device 3 to a small extent. Further, the guide duct 15 also has the same effect as the cylindrical portion 16 of the present invention because the combustion gas flows over a predetermined length at high speed.

For this reason, the combustion state of the large combustion device 2 also changes in the guide duct 15.
They tend to be more stable than those without.

(Modification) In this example, combustion devices with different combustion capacities are combined, and a cylindrical part is provided at the exhaust port of the combustion device with a small combustion capacity. However, when combining combustion devices with the same combustion capacity, or When combining combustion devices with little difference in performance, a cylindrical part shall be provided at both exhaust ports.

This is because both combustion devices are affected by exhaust gases.

Although we have shown an example in which one combustion device is a full-order type and the other combustion device is a Bunsen type, it is also possible to use a combined combustion device in which both combustion devices are a full-order type, or both combustion devices are a Bunsen type. Applicable to

Although we have shown examples of the shape of the cylindrical part narrowing in the flow direction of the exhaust gas, it may be any shape as long as the combustion gas flows at high speed over a predetermined length, such as a passage with a constant passage area or a flow of exhaust gas. Various changes can be made, such as passages that expand in different directions.

Although the cylindrical portion is provided protruding into the interior of the exhaust assembly, it may also be provided within the exhaust port.

The present invention is applied to a combined combustion device that includes at least two combustion devices, and may be applied to a combined combustion device that includes three or more combustion devices.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main part of the combined combustion device, FIG. 2 is a perspective view of the cylindrical part, and FIG. 3 is a schematic diagram of the combined combustion device; η. In the diagram: 1...Combined combustion device 2...Large combustion device 3
...Small combustion device 11...Exhaust assembly 12...
Large exhaust port 13...Small exhaust port 16...Cylindrical part

Claims (1)

[Scope of Claims] 1) Two combustion devices each having a blower that sends combustion air to the combustion section, and connected to the exhaust ports of the two combustion devices, and from the exhaust ports of the two combustion devices In a combined combustion device equipped with an exhaust assembly that collects exhaust gas to be exhausted and guides the exhaust gas to an extension duct, at least one of the exhaust ports of the two combustion devices has a cylindrical tube that throttles the exhaust gas to be exhausted. A composite combustion device characterized by comprising a shaped part.