Heat source machine

Patent metadata

Field	Value
Publication number	US-10823452-B2
Application number	US-201916298244-A
Country	US
Kind code	B2
Filing date	Mar 11, 2019
Priority date	May 23, 2018
Publication date	Nov 3, 2020
Grant date	Nov 3, 2020

Abstract

Provided is a heat source machine with high thermal efficiency. A heat exchanger (3) is provided with a resistance imparting member (8) that imparts resistance to combustion exhaust passing through fins (11). The resistance imparting member (8) is provided with exhaust passage sections (17) which are positioned opposing water pipes (10), and belt-like closing sections (16) that close the gap between the fins (11) of the water pipes (10) that are adjoining to each other.

First claim

What is claimed is:

1. A heat source machine comprising:
a burner; and
a heat exchanger heated by combustion exhaust of the burner,
wherein the heat exchanger comprises: a plurality of water pipes linearly extended; a plurality of fins attached with predetermined intervals provided thereamong along a direction in which each of the water pipes are linearly extended; and a resistance imparting member which is provided on a downstream side of a flowing direction of the combustion exhaust passing between the fins and which imparts resistance to the combustion exhaust passing between the fins, and
the resistance imparting member comprises: an exhaust passage section which is formed at a position opposing each water pipe and through which the combustion exhaust passes; and a belt-like closing section which opposes an area between the water pipes that are adjoining to each other and which closes a gap between the fins along the direction in which the water pipes are linearly extended.

2. The heat source machine according to claim 1 , wherein the closing section of the resistance imparting member is provided in contact with an end edge of the fin.

3. The heat source machine according to claim 1 , wherein the burner is placed above the heat exchanger at an attitude that the flame thereof is formed, being directed downward, and the closing section of the resistance imparting member is formed like a gutter that extends along a linearly extended direction of the water pipes.

Assignees

• Rinnai Kk

Inventors

• Miura Takuya

Classifications

• F28D2021/0024

  for combustion apparatus, e.g. for boilers · CPC title

• F28F9/0265

  by using guiding means or impingement means inside the header box · CPC title

• F24H8/006

  Means for removing condensate from the heater · CPC title

• F24H9/0026

  in combustion gas channels · CPC title

• F28D1/0426

  with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element · CPC title