Shell-and-tube heat exchanger

Patent metadata

Field	Value
Publication number	US-11156404-B2
Application number	US-201816651204-A
Country	US
Kind code	B2
Filing date	Sep 20, 2018
Priority date	Sep 29, 2017
Publication date	Oct 26, 2021
Grant date	Oct 26, 2021

Abstract

A shell-and-tube heat exchanger according to the present invention comprises: an outer barrel having a cavity provided therein such that heating water flows along the same; a lower tube plate that covers an opening near one end of the outer barrel; an upper tube plate that covers an opening near the other end of the outer barrel, the upper tube plate providing an inner space in which a heat source is positioned; a plurality of flues for guiding combustion gas from the upper tube plate to the outside of the lower tube plate; and a main diaphragm arranged across a reference direction between the lower tube plate and the upper tube plate, a plurality of through-holes being formed in the main diaphragm such that the flues penetrate the same, wherein at least some of the through-holes constitute a large-width through-hole (single hole) that at least two of the flues penetrate together.

First claim

The invention claimed is:

1. A shell-and-tube type heat exchanger comprising:
an outer container in a cylindrical shape, wherein openings are formed at opposite ends of the outer container, an empty space connected with the openings at the opposite ends is provided in the outer container, an inlet through which heating water is introduced into the empty space is provided at one end side of the outer container, and an outlet through which the heating water is discharged from the empty space is provided at an opposite end side of the outer container;
a lower tube plate configured to cover the opening at the one end side of the outer container;
an upper tube plate in a cylindrical shape, the upper tube plate being configured to cover the opening at the opposite end side of the outer container and provide an interior space in which a heat source configured to heat the heating water is located;
a plurality of flues configured to guide combustion gas generated by the heat source from the upper tube plate to the outside of the lower tube plate;
a main diaphragm in a circular plate shape, the main diaphragm being disposed between the lower tube plate and the upper tube plate across a reference direction that is a direction toward the opposite end side from the one end side of the outer container, wherein a plurality of through-holes through which the flues pass are formed in the main diaphragm;
a first diaphragm disposed between the lower tube plate and the main diaphragm across the reference direction, wherein the first diaphragm has a plurality of through-holes through which the flues individually pass and has, in the center, a central hole formed through the first diaphragm to provide a flow passage through which the heating water passes; and
a second diaphragm disposed between the main diaphragm and the upper tube across the reference direction, wherein the second diaphragm has a plurality of through-holes through which the flues individually pass and has, in the center, a central hole formed through the second diaphragm to provide a flow passage through which the heating water passes,
wherein at least some of the through-holes are wide through-holes, each of which is a single hole through which two or more flues among the flues pass together, and;
wherein the main diaphragm, the first diaphragm and the second diaphragm are tightly coupled to an inner circumferential surface of the outer container so as not to allow for passage of the heating water between outer circumferential surfaces of the main diaphragm, the first diaphragm and the second diaphragm and the inner circumferential surface of the outer container, such that the heating water flows along a path passing through the central hole of the first diaphragm, the wide through-holes of the main diaphragm around the flues surrounded by the wide through-holes and the central hole of the second diaphragm.

2. The shell-and-tube type heat exchanger of claim 1 , wherein the main diaphragm allows the heating water introduced into the empty space of the outer container to pass through the main diaphragm along the reference direction via an empty space between two adjacent flues among the flues passing through the wide through-hole.

3. The shell-and-tube type heat exchanger of claim 1 , wherein the wide through-hole is formed to be a single hole configured to surround two flues located at the outermost position with respect to a circumferential direction among the flues passing through the wide through-hole, and a space defined between the two flues.

4. The shell-and-tube type heat exchanger of claim 1 , wherein the wide through-hole is formed to be a single hole configured to surround a space defined by two flues located at the outermost position with respect to a circumferential direction among the flues passing through the wide through-hole, a line circumferentially connecting radially inward distal ends of the flues passing through the wide through-hole, and a line circumferentially connecting radially outward distal ends of the flues passing through the wide through-hole.

5. The shell-and-tube type heat exchanger of claim 1 , wherein to support a radially inward or outward distal end of at least one of the flues passing through the wide through-hole, the wide through-hole surrounds a periphery of the distal end independently of the other flues.

6. The shell-and-tube type heat exchanger of claim 1 , wherein the flues are radially disposed with respect to the center of the main diaphragm and are provided in a multiple of 2, and
wherein each of the through-holes is a wide through-hole through which two adjacent flues pass together.

7. The shell-and-tube type heat exchanger of claim 1 , wherein the flues are radially disposed with respect to the center of the main diaphragm and are provided in a multiple of 4, and
wherein each of the through-holes is a wide through-hole through which four adjacent flues pass together.

8. The shell-and-tube type heat exchanger of claim 1 , wherein the flues are radially disposed with respect to the center of the main diaphragm and are provided in a multiple of 5,
wherein each of the through-holes is one of a first wide through-hole through which two adjacent flues pass together and a second wide through-hole through which three adjacent flues pass together, and
wherein the first and second wide through-holes are alternately disposed along a circumferential direction.

9. The shell-and-tube type heat exchanger of claim 1 , wherein each of the through-holes is a wide through-hole through which the same number of adjacent flues pass together.

10. The shell-and-tube type heat exchanger of claim 1 , wherein a plurality of central through-holes are formed in the center of the main diaphragm to pass through the main diaphragm and extend in any radial direction of the main diaphragm,
wherein the central through-holes are disposed to be spaced apart from each other in a direction perpendicular to the radial direction, and
wherein the plurality of flues include some flues passing through each of the central through-holes.

11. The shell-and-tube type heat exchanger of claim 1 , wherein the upper tube plate provides, between an outer circumferential surface of the upper tube plate and an inner circumferential surface of the outer container, a flow space in which the heating water flows, and
wherein the outlet of the outer container is connected to the flow space.

Assignees

• Kyungdong Navien Co Ltd

Inventors

• Park Jun Kyu
• Ahn Sung Jun
• Lim Hyun Muk

Classifications

• F24H1/36 Primary

  the water chamber including one or more fire tubes · CPC title

• F28D7/10 Primary

  the conduits being arranged one within the other, e.g. concentrically {(multiple wall tubes for leak detection F28F1/003)} · CPC title

• F28F9/22

  Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates · CPC title

• F28F13/06

  by affecting the pattern of flow of the heat-exchange media {(F28F13/003 takes precedence; static flow control means in header boxes F28F9/026)} · CPC title

• F28F13/12

  by creating turbulence, e.g. by stirring, by increasing the force of circulation (F28F13/08 takes precedence) · CPC title