JPS61105051A - Water heating device - Google Patents

Abstract

PURPOSE:To reduce the noise generated by a burner by a method wherein plural small holes are provided on the periphery wall of a flow control cylinder forming a flue. CONSTITUTION:By supplying a water from a water supply pipe 12 to a heat exchanger 1, the water is filled into a vertical pipe 4 and a lower header 3, than a hot-water is supplied from a hot-water supply pipe 13. At this time, by the operation of a burner 8 in a burning chamber 7, a high temperature burning gas is introduced to a flue 11 after striking the bottom surface of a flow smoothing cylinder 5, moved up mainly through a space between a vertical pipe 4 and the vertical pipe 4. The flow smoothing cylinder 5 forming the flue 11 is provided with plural small holes 6 on the periphery wall thereof correspond to the space between each vertical pipe 4. That is, a resonance type muffler is formed by providing at least one small hole, therefore, the noise passing through the flue 11 can be absorved effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water heater for hot water supply, and aims to improve heat exchange efficiency and reduce noise generated within the heat exchanger.

Conventional configuration and its problems Conventionally, this type of water heater is shown in Japanese Patent Publication No. 1734/1982. In this configuration, the combustion exhaust gas flows evenly around the entire circumference of the resonance type muffler, so resonance occurs. There was a problem that the effect as a muffler was low because a large proportion of the water flowed through the portions of the muffler where the small holes were not provided.

OBJECTS OF THE INVENTION The present invention solves these conventional problems, and aims to reduce combustion noise, downsize a heat exchanger, and improve thermal efficiency.

Structure of the Invention In order to achieve this object, the present invention provides a donut-shaped upper header and a lower header at the lower end, connects these two headers with a plurality of vertical pipes, and inside the vertical pipe group, It is a hollow flow restricting tube with a plurality of small holes in its peripheral wall, and an outer shell is provided on its outer periphery.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a heat exchanger, which is composed of a donut-shaped upper header 2, a lower header 3, and a plurality of vertical pipes 4 connecting both headers 2, 3. has been done. Reference numeral 5 denotes a hollow flow control tube having a plurality of small holes 6 in the peripheral wall, which is provided inside concentrically with the 4 groups of vertical pipes of the heat exchanger 1, and a burner is installed in the lower combustion chamber 7 of the flow control tube 5. 8 is built-in.

Note that the small holes 6 provided in the peripheral wall of the flow control tube 5 are provided corresponding to the gaps between the vertical pipes 4 of the heat exchanger 1, and at the same time,
At least one or more is provided corresponding to each gap.

Reference numeral 9 denotes an outer shell provided outside concentrically with the 4 groups of vertical pipes of the heat exchanger 1, and the flow control tube 5 and the outer shell 9 form a flue 10 around the vertical pipe 4 through which combustion gas passes. be done. 11 is an exhaust port, and 12 and 13 are a water supply pipe and a hot water outlet pipe that communicate with the upper header 2. 14 is a heat insulating material provided around the outer shell 9, and 15 is an exterior.

In the above configuration, when water is supplied to the heat exchanger 1 from the water supply pipe 12, the water fills the vertical pipe 4 and the lower header 3 and is supplied from the hot water outlet pipe 13. At this time, when the burner 8 of the combustion chamber 7 is operated, The high-temperature combustion gas collides with the bottom of the flow restrictor 5 and is then led to the flue 10, mainly through the vertical pipe 4 and the vertical pipe 4.
Climb up the gap. A plurality of small holes 6 are provided in the peripheral wall of the flow control tube 5 forming the flue 10, corresponding to the gaps between the vertical pipes 4, and at least one hole is provided for each gap to achieve so-called resonance noise reduction. Since the structure is configured as a container, noise passing through the flue 10 can be effectively absorbed.

Effect of the invention (1) It has an excellent silencing effect.

In other words, the combustion exhaust gas mainly passes through the gap between the vertical pipes of the flue, but the peripheral wall of the flow control tube that forms the flue is provided with a plurality of small holes corresponding to this gap. The noise generated by the burner can be significantly reduced.

(2) Small and compact with excellent thermal efficiency.

In other words, since the heat transfer surface is composed of vertical pipes, the heat transfer area can be increased and the overall size can be reduced.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a water heater according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AB in FIG. 1. 2...-upper header, 3...lower header, 4
... Vertical pipe, 5 ... Control cylinder, 6 ...
...Small hole, 9...Outer body.

Claims (3)

[Claims] (1) A hollow shape with a donut-shaped upper header and a lower header provided at the upper and lower ends, these two headers being connected by a plurality of vertical pipes, and a plurality of small holes provided in the peripheral wall inside the group of vertical pipes. A water heater with a flow control cylinder and an outer shell on the outside. (2) The water heater according to claim 1, wherein a plurality of small holes provided in the flow control cylinder are provided corresponding to gaps between vertical pipes. (3) The water heater according to claim 2, wherein at least one small hole is provided corresponding to each gap between the vertical pipes.