JPS62102022A - Combustion discharging device - Google Patents

Abstract

PURPOSE:To reduce a pressure loss in a discharging passage and at the same time make a compact size unit and improve a molding characteristic by a method wherein a discharging port of an air supplying or discharging fan is connected to one end of a bottom surface of a discharging duct having a uniform rectangular section bent to an inverted-L shape and having a specified size. CONSTITUTION:Air required for combustion is fed into a bath burner 3 and a hot-water feeding burner 4 under operation of an air feeding and discharging fan 15, the hot discharged gas is passed through a water feeding port coupling 13 and exchanges heat with cold water in a hot-water feeding exchanger 11 and in turn also exchanges heat with bath water within a bath heat exchanger 12, the discharged gas after its heat exchanging operation passes through within a discharging over 10 and passes from an air feeding port 15a to a discharging port 15b of an air feeding and discharging fan 15. Then, the discharged gas is flowed in a connection port 16b arranged at one corner of a bottom surface 16a of a discharging device 16 composed of a discharging duct 20 having a rectangular sectional part 19 of which long side 16d is more than three times of the discharging port 15b and short side has the same size as that of the discharging port 15b, whereby a pressure loss in the discharging duct 20 is excessively reduced and the gas is flowed out of a bath hot water feeding machine with a feeding or discharging fan through a blowing louver 18.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a combustion equipment equipped with an air supply/exhaust fan, which can be easily molded, reduces pressure loss in the exhaust system as much as possible, and is compact. This invention relates to a combustion exhaust system that takes into account the effective use of other parts within the system.

BACKGROUND OF THE INVENTION In recent years, as equipment has become more compact, combustion exhaust systems in recent years have been designed to minimize pressure loss in the exhaust system and to effectively utilize the air supply and exhaust capacity.

An example of the above-mentioned exhaust system will be described below with reference to FIGS. 4 and 6 of the drawings. 1 is a device for supply/exhaust 77 8 which is composed of an exhaust duct 6 which connects the inlet 3 to the discharge port 2a of the 77 and 2, expands the passage 4 in a curved shape, and has a rectangular outlet 5. The exhaust device is composed of an exhaust duct 11 which is connected to the discharge port 8a in the same size and has an elbow-shaped passage portion 9 with the same size and a discharge port 10 with the same diameter.

Problems to be Solved by the Invention However, with the exhaust duct 11 in which the passage portion is enlarged in a curved shape as described above, it is not possible to make the exhaust device 7 compact, and it is difficult to process the exhaust device 7 into a curved shape. Becomes expensive. Furthermore, with an exhaust duct in which the passage portion 9 is elbow-shaped, it is difficult to satisfy the requirement of minimizing pressure loss in the exhaust system.

In view of the above-mentioned problems, the present invention is based on the bottom surface of an exhaust duct, which has a uniform rectangular cross section whose long side is three times or more the size of the outlet of the air supply/exhaust port, and whose short side is the same size as the outlet. By connecting the discharge port of the air supply/exhaust fan to one end, pressure loss in the exhaust system can be minimized, and an exhaust device that is compact and has good moldability is provided.

Means for Solving the Problems In order to solve the above problems, the combustion exhaust system of the present invention has the following features:
It is bent in an inverted shape, and has a uniform rectangular cross section with the long side being at least three times the size of the outlet of the air supply/exhaust fan, and the short side being the same size as the outlet, and one end of the bottom. The exhaust duct includes an exhaust duct having a connection port that connects to the discharge port of the supply/exhaust fan, and a fastening member that fixes the connection port and the discharge port of the supply/exhaust fan.

Function According to the above means, the connection port provided at one end of the bottom surface of the exhaust duct is connected to the discharge port of the supply/exhaust fan and fixed with a fastening member.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 to 3. 1. The bath kettle is a water heater. 2 is a bath burner 3
This is a gas block that sends gas to the hot water supply burner 4 via the bath gas pipe 6 and the hot water supply gas pipe 6. 7 is a controller. Numerals 8 and 8a are ignition electrodes provided separately for hot water supply and bath use, and similarly, 9 and 9a are flame detectors provided for hot water supply and bath use. 1o is an exhaust cover that connects the hot water heat exchanger 11 provided directly above the hot water supply burner 4 and the bath heat exchanger 12 provided directly above the bath burner 3 as the same exhaust gas passage. The hot water heat exchanger 11 has an inlet and an outlet directly connected to a water inlet joint 13 and a hot water inlet joint 14. 16 is an air supply/exhaust fan having an air supply port 15a connected to the exhaust cover 10. 16 connects the connection port 16b provided on one side of the bottom surface 16a and the exhaust port 16b of the air supply/exhaust port 16 with a screw 17,
The exhaust duct 2 has a uniform rectangular cross section 19 that is curved in an inverted shape toward the blowout looper 18 and has a rectangular cross section 19 whose long side is at least three times the size of the exhaust port 1sb and whose short side is the same size as the exhaust port 16b.
A device consisting of 0.

In the above embodiment, the ignition electrode 8 is
, 8a, discharge starts to the bath burner 3 and the hot water supply burner 4, and gas is sent to the bath burner 3 and the hot water supply burner 4 through the gas block 2, the bath gas pipe 6, and the hot water supply gas pipe 6. The flame detectors 9, 9a are activated by the combustion, and the combustion continues. On the other hand, the air necessary for combustion is sent into the bath burner 3 and the hot water supply burner 4 through the air supply and exhaust gas 77, and the high-temperature exhaust gas enters the water supply port joint 13 and is heated by the cold water and hot water heat exchanger 11. The hot water is exchanged and flows out from the hot water inlet joint, while also being heat exchanged with the bath water in the bath heat exchanger 12, and the exhaust gas after heat exchange passes through the exhaust gas par 10 and enters the air supply/exhaust 71 from the air inlet 15a. It passes through the exhaust port 15b of the tube 16. The long side 16a is the exhaust port 15b.
The exhaust gas flows through the connection port 16b provided at one corner of the bottom surface 16a of the exhaust device 16, which is composed of an exhaust duct 2o having a rectangular cross section 19 whose short side 16d is the same size as the exhaust port 16b. The water flows out to the outside 1 of the bathtub water heater equipped with an air supply/exhaust fan via the blowout looper 18 while minimizing the pressure loss inside.

Effects of the Invention As described above, the combustion exhaust system of the present invention provides the following effects.

■ Place the outlet of the supply/exhaust fan at one end of the bottom of the exhaust duct, which has a uniform rectangular cross section with the long side at least three times the size of the outlet of the supply/exhaust fan and the short side of the same size as the outlet. With this connection, the pressure loss from the discharge port to the exhaust duct outlet can be minimized, and the PQ capacity of the air supply and exhaust fan can be used efficiently.

(2) It is a bent sheet metal structure, which is compact, inexpensive, and can easily satisfy the above item 0.

■ Since it is a compact exhaust system, space can be used effectively for other parts from the equipment configuration perspective, and the equipment can be made more compact.

[Brief explanation of drawings]

Fig. 1 is a front view of a bath kettle water heater with an air supply/exhaust fan 7 according to an embodiment of the present invention without a front plate, with main parts cut out, Fig. 2 is a front view of the area around the exhaust device, and Fig. 3 is a The same side view, FIG. 4, and FIG. 5 are a front view and a side view of the conventional example with main parts cut out. 15... Supply/exhaust fan, 16b... Discharge port, 19... Rectangular cross section, 16a...
・Bottom surface, 16b... Connection port, 16a...
-Long side, 16d...Short side, 20...Exhaust duct, 16...Exhaust device. Name of agent: Patent attorney Toshio Nakao and 1 other person3-
--One 4 holes in

Claims (1)

[Claims] The supply/exhaust fan is bent into an inverted L shape, the long side is at least three times the size of the outlet of the supply/exhaust fan, the short side is the same as the outlet, and the cross section is uniformly rectangular. The combustion exhaust device further includes an exhaust duct having a connection port connected to the discharge port of the air supply/exhaust fan at one end of the bottom surface.