JP2003083618A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent local boiling in a heating pipe. SOLUTION: A plurality of heating pipes 5, communicated with a water passage for heating, are provided in a plurality of rows of identical fins 4 arranged in parallel in the direction of up-and-down while a fin configuration wherein semi-circular notches 8 are provided at the lower side of a hole bored part for inserting the heating pipes 5 of upper and lower stages of the fins 4 is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger of a hot water supply / room heating machine that heats circulating hot water for heating.

[0002]

2. Description of the Related Art In a conventional hot water supply / room heating machine, a burner 1 for burning a mixed gas obtained by mixing gas with fuel as air is provided below a drum 2 which constitutes a combustion chamber. The combustion gas heated by the burner 1 rises along the drum 2 to receive the heat by the fins 4 of the heat exchanger 3 and heat the hot water circulating in the heating pipe 5. The heated hot water is radiated as warm air by the heating radiator 10. Combustion gas that is not heat-received by the fins 4 is discharged from the exhaust port 6 of the hot water supply / room heating machine as it is at high temperature.

[0003]

However, in the conventional structure, the temperature of the combustion gas flowing from the lower side to the upper side of the fin becomes highest at the lower part of the fin, and the lower side of the heating pipe is intensively heated. However, there is a problem that a boiling noise is likely to be generated when the hot water is heated due to the local boiling under the heating pipe.

[0004]

In order to solve the above-mentioned problems, the heat exchanger of the hot water supply / heater according to the present invention has a plurality of heating pipes connected in parallel to each other and a plurality of heating pipes in the vertical direction, which are in parallel with each other. The fin shape is provided in a plurality of rows of the same fin, and has a semi-circular cutout portion below the hole processing portion of the heating pipe insertion portion in the upper and lower stages of the fin.

According to the above invention, the combustion gas flowing from the lower side to the upper side of the fin does not concentrate and heat the lower side of the heating pipe, so that the heating pipe is uniformly heated and Local boiling can be prevented.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention has a plurality of heating pipes connected in parallel and a plurality of heating pipes in the vertical direction, which are connected to a heating water channel, and are provided in parallel in a plurality of rows in the same fin. A fin shape having a semicircular cutout portion is formed below the hole processing portion of the pipe insertion portion.

Further, the first fin having a semi-circular cutout portion below the hole processing portion of the heating pipe insertion portion of the upper and lower fins, and the hole processing portion of the heating pipe insertion portion of the upper and lower fins. It is a heat exchanger of a hot water supply / room heating machine that forms a fin shape in which second fins having no notches are alternately arranged.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a heat exchanger for a hot water supply / room heating apparatus according to the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows a schematic configuration of a hot water supply / room heating machine as Embodiment 1 of the present invention. The water heater is a burner that burns a mixed gas that uses gas as fuel and is mixed with air.
Is provided below the drum 2 that constitutes the combustion chamber.
The combustion gas heated by the burner 1 rises along the drum 2 to receive the heat by the fins 4 of the heat exchanger 3 and heat the hot water circulating in the heating pipe 5. The heated hot water is circulated by driving the pump 9, and is radiated as warm air by the heating radiator 10.

As shown in FIG. 2, the heat exchanger 3 has a structure in which a heating pipe 5 and a large number of common fins 4 are arranged in upper and lower two stages and integrally brazed. A fin shape having a semicircular cutout portion 8 is formed below the hole processing portion of the heating pipe insertion portion 7 in the upper and lower fins.

(Embodiment 2) The schematic construction of the hot water supply / room heater is the same as that of the first embodiment. The water heater is equipped with a burner 1 which burns a mixed gas obtained by mixing gas with fuel as air under a drum 2 which constitutes a combustion chamber. The combustion gas heated by the burner 1 rises along the drum 2 to receive the heat by the fins 4 of the heat exchanger 3 and heat the hot water circulating in the heating pipe 5. The heated hot water is circulated by driving the pump 9,
The heating radiator 10 radiates heat as hot air. Heat exchanger 3
3, the heating pipes 5 are arranged by vertically arranging a plurality of common fins 4 in a plurality of common fins 4 and brazing them integrally. First fins having a semi-circular cutout portion 8 below the hole processing portion of the heating pipe insertion portion 7 in the upper and lower fins, and a cutout portion in the hole processing portion of the heating pipe insertion portion in the lower fin portion. A fin shape is formed by alternately arranging second fins that are not present.

[0012]

As is apparent from the above description, according to the heat exchanger of the hot water supply / room heating device of the present invention, a plurality of heating pipes communicating with the heating water channel are provided in parallel, and a plurality of heating pipes are provided in the vertical direction, and are parallel to each other. The fins are formed in a plurality of rows of the same fin, and a fin shape is formed with a semi-circular cutout portion below the hole processing portion of the heating pipe insertion portion of the upper and lower fins. A first fin provided with a semi-circular cutout under the holed portion of the insertion portion, and a second fin without a cutout at the holed portion of the heating pipe insertion portion above and below the fins.
Since the fins are formed by alternately arranging with the fins of the above, the combustion gas flowing from the lower side to the upper side of the fins does not concentrate and heat the lower side of the heating pipe, so that the heating pipe is evenly distributed. It is possible to prevent local boiling in the heating pipe by heating to a high temperature.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a hot water supply / room heating device according to a first embodiment of the present invention.

FIG. 2 is a plan view of fins of the heat exchanger of the same heating machine.

FIG. 3 (a) is a first heat exchanger according to a second embodiment of the present invention.
(B) Plan view of the second fin of the same heat exchanger

FIG. 4 is a plan view of fins of a conventional heat exchanger.

[Explanation of symbols]

3 heat exchanger Four fins 5 heating pipes 7 Heating pipe insertion part 8 Semi-circular notch

Claims (2)

[Claims] 1. A hole having a plurality of heating pipes communicating in parallel with a heating water channel in parallel and having a plurality of heating pipes in the vertical direction, which are provided in parallel in a plurality of rows in the same fin, in which holes for heating pipes in upper and lower stages of fins are drilled A heat exchanger for a water heater and heater that forms a fin shape with a semicircular cutout on the lower side of the section. 2. A hole having a plurality of heating pipes communicating in parallel with a heating water channel in parallel and a plurality of heating pipes in the vertical direction, which are provided in the same fin in a plurality of rows in parallel. Fin shape in which first fins having semicircular cutouts on the lower side of the fins and second fins having no cutouts in the hole processing portion of the fin pipe insertion portion of the lower fin are alternately arranged The heat exchanger of the hot water supply and heater that forms the.