JPH0289910A - combustion device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a combustion device such as an FF type water heater installed using a common air supply/exhaust duct in an apartment complex.

Conventional technology BF type equipment installed in this type of duct (BF-0 type)
is as shown in FIG.

A heat source device 2 provided in a room on each floor is attached to a shared air supply/exhaust duct 1 vertically installed from the first floor to the fifth floor of an apartment building, for example. A cylindrical exhaust top 3 of the heat source device 2 protrudes into the common supply/exhaust duct 1, and a cylindrical air supply part 4 shorter than the exhaust top 3 is provided on its outer periphery.

In the above, exhaust gas generated by combustion from the heat source device 2 passes through the exhaust top 3 by draft action and is discharged into the common air supply/exhaust duct 1.

Similarly, in order to achieve a balance with the exhaust action, air supply is also naturally supplied from within the duct 1 to the combustion section of the heat source device 2 via the air supply section 4. In this way, in the case of the BF type gas appliance, since a fan is not provided, the exhaust gas is discharged from the exhaust top 3 into the duct 1 by natural draft.

Therefore, the exhaust gas is easily diffused, and in order to equalize the concentration of exhaust gas in the shared air supply and exhaust duct, it is necessary to set the distance between the installed heat source units on each floor to 800 m.

This distance is 3-2 of the gas equipment installation standards and practical guidelines.
-4-5 The distance between the upper and lower gas equipment described in the minimum vertical distance between gas equipment is 800 liters or more. Further, the shape of the exhaust top 3 is a rectangular tube and a front tube as shown in FIG. 5, since the exhaust is carried out by natural draft, so there is no need to consider the direction of the exhaust.

Problems that the invention aims to solve Recently, however, it has become necessary to replace conventional BF-type gas appliances, and due to technological progress, FF-type combustion machines have changed from BF-type combustion machines. type combustion machines were used, and it became necessary to install corresponding ducts.

In the case of FF type equipment, exhaust is forcibly performed by a fan, so if the exhaust top 3 shown in Figure 5 (a) and (b) is used as is, the exhaust force will be strong and the exhaust will be When the air is discharged forward, it hits the opposing wall 1a of the common supply/exhaust duct 1, returns as shown by the arrow, and enters from the air supply section 4, resulting in poor combustion. Additionally, if the heat source units 2 are installed facing each other on the same floor with the shared air supply/exhaust duct 1 in the middle, the combustion exhaust gas from each other may interfere with each other, or the exhaust gas from one heat source unit 2 may interfere with each other. enters the air supply section 4 of the other directly opposing heat source device,
This had the problem of causing poor combustion.

The present invention solves the above-mentioned problems of the conventional technology, and relates to a supply/exhaust pipe for an FF type hot water supply system that facilitates supply and exhaust, allows the use of an existing shared supply/exhaust duct, and is designed to be downsized.

Means for Solving the Problems In order to solve the above problems, the present invention provides a fan that forcibly performs air supply and exhaust, a cylindrical exhaust top that performs exhaust and air supply into a common supply and exhaust duct, and a cylindrical air supply. The upper and lower parts of the tip of the exhaust top protruding into the common air supply/exhaust duct are both oriented diagonally upward, and the top end face of the top part of the exhaust top is the same as or more protruding than the bottom end face of the bottom part. The structure is as follows.

Effect In the above configuration, by making the tip of the exhaust top diagonally upward and further protruding the top end face of the top piece beyond the top end face of the bottom piece, in FF type equipment, when exhausting into the duct, it is directed diagonally upward. Since the exhaust gas is discharged from the exhaust gas, there is no negative effect even when a heat source unit is installed opposite the exhaust gas, and even when installed alone, there is no exhaust return and combustion is good.

In addition, even if something is dropped into the duct, the upper end of the exhaust top protrudes beyond or is the same as the bottom end, so there is a risk that the object will fall into the exhaust top and become non-combustible. do not have. Furthermore, since the area in which the exhaust top protrudes into the duct can be reduced, it is possible to reduce the cross-sectional area of the duct.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

Note that the same parts as in the above conventional example are given the same reference numerals, detailed explanations are omitted, and different parts will be mainly explained.

In FIGS. 1 and 2, the upper piece 5 and the lower piece 6, which are the tips of the exhaust top 3 that protrude into the common air supply and exhaust top 1, are oriented diagonally upward, and are further connected to the common air supply and exhaust duct of the upper piece 5. The protrusion of the inner part 1 is the same as or greater than that of the lower piece 6.

The operation of the above configuration will be described above.

When the exhaust gas passes through the exhaust top 3 and is discharged into the common supply/exhaust duct 1, it is directed diagonally upward because the upper piece 5 and the lower piece 6 of the tip part have upward slopes. At this time, unless both sides of the upper piece 5 and the lower piece 6 are oriented obliquely upward, the air will not be smoothly exhausted upward. In other words,
Even if only the lower piece 6 is oriented obliquely upward as shown in FIG. 3, the exhaust gas does not flow upward smoothly and is discharged forward.

By emitting exhaust gas diagonally upward, even if air is supplied and exhausted using a fan (not shown), the exhaust gas may return to the opposing wall surface 1a of the duct 1 and cause incomplete combustion.
Furthermore, even if the heat source equipment is installed in a room on the same floor on the facing surface 1a, the exhaust air will not interfere with the room, and the air supply will not be returned.

Furthermore, the exhaust gas discharged into the common air supply/exhaust duct 1 will be sufficiently diffused if the interval between the appliances installed on the upper and lower floors is 800 days, so the minimum vertical spacing of 800 f1 or more of the conventional installation standards can be satisfied. .

Furthermore, even if something is thrown into the shared air supply/exhaust duct 1, the top piece 5 protrudes the same or more than the bottom piece 6, so the object may get into the exhaust top 3 and cause incomplete combustion. There is no need to worry about rain getting in.

Furthermore, since the distance protruding into the common supply/exhaust duct 1 can be reduced, the installation standards and practical guidelines for gas appliances 3-2-
The cross-sectional area of the shared air supply and exhaust duct 1 defined in 4-2 can be reduced.

Effects of the Invention As described above, the present invention allows exhaust gas to be smoothly discharged diagonally upward by oriented diagonally upward both the top and bottom pieces of the tip of the exhaust top protruding into the common air supply/exhaust duct. As a result, there is no need to worry about the return of exhaust gas, resulting in better combustion. Furthermore, since the upper piece at the tip of the exhaust top is the same length as the lower piece or protrudes longer than the lower piece, even if something gets into the duct, it will not block the exhaust top or allow rain to get in.

Furthermore, since the amount of protrusion of the tip of the exhaust top can be reduced, the cross-sectional area of the common air supply and exhaust duct can be used effectively.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a water heater installed in a duct according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of an exhaust top according to an embodiment of the present invention, and FIG. 3 is a comparison diagram with the present invention. An enlarged perspective view of the exhaust top that was conceived, Figure 4 is the conventional BF-D
FIG. 5 is an enlarged perspective view of the exhaust top. 1... Common supply and exhaust duct, 3... Exhaust top, 4... Air supply section, 5... Top piece,
6...Lower piece. Name of agent: Patent attorney Shigetaka Awano Figure 4 Figure 5 (a) (b) Figure 3

Claims (1)

[Claims] A combustion fan that forcibly supplies and exhausts air, a cylindrical exhaust top and a cylindrical air supply part that exhausts and supplies air into a common supply and exhaust duct, A combustion device in which both the upper and lower pieces of the tip of the exhaust top protrude upward diagonally, and the upper piece of the exhaust top protrudes as much as or more than the lower piece.