JPH0740829Y2 - Combined combustion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention installs a plurality of combustion chambers, each having a combustion fan, a gas burner, and a heat exchanger, in one casing, and At least one gas burner in the combustion chamber relates to a forced combustion type composite combustion apparatus which is capable of varying the amount of heat generation.

[Prior art]

FIG. 3 shows two cans 2 as an example of this type of composite combustion apparatus.
It is a schematic diagram which shows the bath kettle with a hot water supply of a waterway system.

In the casing 1, a bath combustion chamber 2 and a hot water supply combustion chamber 3
In addition to the above, the casing 1 is provided with an intake port 4 for taking in combustion air.

The bath combustion chamber 2 is provided with a bath side combustion fan 5, a bath side burner 6 and a bath side heat exchanger 7, while the hot water supply combustion chamber 3 is provided with a hot water supply side combustion fan. A hot water supply side burner 9 and a hot water supply heat exchanger 10 are provided.

The bath side combustion fan 5 supplies the air sucked into the casing 1 from the air supply port 4 to the bath side burner 6.
The bath-side burner 6 burns the fuel gas supplied from the gas supply pipe 12 via the bath-side control unit 11. The combustion gas is discharged from the exhaust port 13 through the bath side heat exchanger 7.

The circulation pump 14 sucks hot water in a bathtub (not shown) through a return pipe 15 for reheating and pumps the hot water into the bathtub through the bath side heat exchanger 7 and the forward pipe 16 for reheating. Bring back.

The hot water supply side combustion fan 8 supplies the air drawn into the casing 1 from the air supply port 4 to the hot water supply side burner 9. The hot water supply side burner 9 burns the fuel gas supplied from the gas supply pipe 12 via the hot water supply side control unit 17. The combustion gas is discharged from the exhaust port 13 through the heat exchanger 10 for hot water supply.

The water supply supplied from the water supply pipe 18 to the hot water supply heat exchanger 10 is heated while flowing through the hot water supply heat exchanger 10 and distributed through the hot water supply pipe 19.

[Problems to be solved by the device]

Recently, there has been a demand for miniaturization of combustion devices.
There tends to be a relatively large volume combustion chamber within a relatively small casing.

Therefore, in a combined combustion device in which a plurality of combustion chambers are provided in the same casing, there arises a problem of combustion state interference.

The above-mentioned problem of interference will be described below with reference to the conventional example shown in FIG.

When the composite combustion apparatus of this conventional example is operated at the rated value, the heating capacity of the hot water supply combustion chamber 3 is larger than that of the bath combustion chamber 2. In such a case, a malfunction related to interference occurs in the bath combustion chamber 2 having a small capacity, which deteriorates the combustion state or produces an abnormal combustion sound.

Such an abnormality occurs when a regular flow rate of fuel gas is supplied to the bath side burner 6 and the bath side combustion fan 5 is rotating at a regular rotation speed. This phenomenon is
Since this occurs even when the fuel gas flow rate and the combustion fan rotation speed are normal, it has been difficult in the prior art to prevent abnormal combustion due to the above-mentioned interference.

In the conventional combined combustion apparatus shown in FIG. 3, when the heating capacity of the hot water supply combustion chamber 3 is narrowed down to be smaller than the heating capacity of the bath combustion chamber 2, abnormal combustion due to interference similar to the above occurs. Occurs in chamber 3.

As in the conventional example shown in FIG.
In the combined combustion device capable of varying the heating capacity not only when the individual combustion chambers are provided, but also when the three or more combustion chambers are provided in one casing, interference due to interference occurs. Abnormal combustion problems occur.

The present invention has been made in view of the above circumstances, and is a forced combustion type composite combustion device having a structure in which a plurality of combustion chambers each including a combustion fan, a gas burner, and a heat exchanger are installed in the same casing. In another aspect, it is an object of the present invention to provide a composite combustion device that prevents abnormal combustion due to interference of combustion states of the plurality of combustion chambers.

[Means for Solving the Problems]

In order to achieve the above object, the combined combustion device of the present invention is
For at least one combustion chamber of the plurality of combustion chambers,
An independent intake port (air supply port) for combustion air is provided, and an air intake path independent from other combustion chambers is provided between the independent intake port and the combustion fan.

[Action]

As described above, if a combustion fan provided in one combustion chamber is provided with an independent air supply port and intake passage for the other combustion chamber, the combustion air of the one combustion chamber The suction operation is performed independently of the suction operation of the combustion air in the other combustion chambers.

Therefore, if the combustion fan of the one combustion chamber rotates at a predetermined rotation speed, a predetermined flow rate of the combustion air is sucked and supplied to the burner of the one combustion chamber.

Therefore, when the burner of one combustion chamber is supplied with a predetermined flow rate of fuel gas, normal combustion is performed without interference from the combustion state of the other combustion chamber.

〔Example〕

FIG. 1 is a schematic diagram showing an embodiment of the composite combustion apparatus of the present invention.

This embodiment is an improvement in which the present invention is applied to the conventional example shown in FIG. 3, and those having the same drawing reference numerals as in FIG. 3 are the same as or similar to those in the conventional example. It is a component.

Next, the differences between the embodiment shown in FIG. 1 and FIG. 3 will be described.

The casing 1 of this example is provided with a hot water supply side air supply port 4A for introducing intake air of the hot water supply side combustion fan 8 and a bath side air supply port 4B for introducing intake air of the bath side combustion fan 5. is there.

Further, a bath side air supply passage 20 is provided which connects the suction port of the bath side combustion fan 5 and the bath side air supply port 4B.

As a result, the intake airflow of the bath side combustion fan 5 of the bath combustion chamber 2 is changed to the hot water supply side combustion fan 8 of the hot water supply combustion chamber 3.
The intake air flow is cut off, and the intake operation of the combustion air is performed independently of each other. Similarly, even when the heating capacity of the hot water supply side burner 9 is changed, the intake air flow of the hot water supply side combustion fan 8 is cut off from the intake air flow of the bath side combustion fan 5 and is independent of each other. The suction operation is performed.

Therefore, regardless of the magnitude relationship of the heating capacity of both combustion chambers,
There is no risk of interference in the suction operation of both combustion chambers. Therefore, abnormal combustion due to interference is prevented.

FIG. 2 is a schematic view of an embodiment different from the above. Next, the difference between the configuration of FIG. 2 and that of FIG. 1 (the above embodiment) will be described.

In the casing 1 of this example, the hot water supply side air supply port 4A is provided near the hot water supply side combustion fan 8, the bath side air supply port 4B is provided near the bath side combustion fan 5, and the bath combustion chamber is provided. A partition plate 21 is provided between the hot water supply combustion chamber 3 and the hot water supply combustion chamber 2.

As a result, the bath-side combustion fan 5 sucks combustion air from the bath-side air supply port 4B, and the hot-water supply-side combustion fan 8 sucks combustion air from the hot-water supply side air supply port 4A, independently of each other.

Also in this embodiment, since the intake air flows of both combustion chambers do not interfere with each other, the same effect as the above embodiment can be obtained.

In each of the above-mentioned embodiments, the present invention is applied to a composite combustion device in which two combustion chambers are provided in one casing.
Similarly, the present invention can be applied to a composite combustion apparatus in which one casing has three or more combustion chambers.

In the case of having three or more combustion chambers, an independent air supply port for combustion air intake and a combustion air passage are provided for the combustion fan provided in at least one of the combustion chambers. .

[Effect of device]

As described above, the present invention is applied to at least the forced combustion type composite combustion apparatus having a structure in which a plurality of combustion chambers each having a combustion fan, a gas burner, and a heat exchanger are installed in the same casing. If an independent combustion air intake port and an independent combustion air intake passage are provided for the combustion fan provided in one combustion chamber, the combustion air intake operations of the combustion chambers will not interfere with each other, and this will cause interference. Abnormal combustion is prevented.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the composite combustion apparatus according to the present invention, FIG. 2 is a schematic view showing an embodiment different from the above, and FIG.
The figure is a schematic view of a conventional composite combustion apparatus. 1 ... Casing, 2 ... Bath combustion chamber, 3 ... Hot water supply combustion chamber, 4A ... Hot water supply side air supply port, 4B ... Bath side air supply port, 5 ... Bath side combustion fan, 6 ... Bath side burner, 8 ... Hot water supply side combustion fan, 9 ... Hot water supply side burner, 20 ... Bath side air supply passage, 21 ... Partition plate.

Claims (1)

[Scope of utility model registration request] 1. A forced combustion type composite combustion apparatus in which a plurality of combustion chambers each having a combustion fan, a gas burner, and a heat exchanger are installed in the same casing, and at least one of the plurality of combustion chambers is provided. The gas burner has a variable calorific value, and a combustion fan provided in at least one combustion chamber of the plurality of combustion chambers is used for combustion of a combustion fan provided in another combustion chamber. A composite combustion apparatus having a combustion air intake and a combustion air intake passage that are independent of the air intake and the combustion air intake passage.