Gas furnace and air conditioner having the same

Patent metadata

Field	Value
Publication number	US-12460837-B2
Application number	US-202217978450-A
Country	US
Kind code	B2
Filing date	Nov 1, 2022
Priority date	Nov 5, 2021
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

Disclosed are a gas furnace and an air conditioner having the same. The gas furnace includes: a burner for burning fuel; a heat exchanger extending long and providing a passage for combustion gas generated by the burner; a blower for causing a flow of air passing around the heat exchanger; and a plurality of guides passing through the heat exchanger and spaced apart from each other in a longitudinal direction of the heat exchanger. The heat exchanger includes: a first tube forming an entry of the heat exchanger; a second tube forming an exit of the heat exchanger and spaced apart from the first tube in a direction crossing the longitudinal direction of the heat exchanger; and a bend connecting the first tube and the second tube. The plurality of guides is alternately disposed in a direction in which the first tube and the second tube are spaced apart from each other.

First claim

What is claimed is:

1 . A gas furnace, comprising:
a burner configured to burn fuel; a heat exchanger that extends longitudinally and provides a passage for combustion gas generated by the burner; a blower configured to cause a flow of air passing around the heat exchanger; a plurality of guides through which the heat exchanger penetrates and spaced apart from each other in a longitudinal direction of the heat exchanger; a top plate positioned between the heat exchanger and the blower, and having a top hole through which air passes; a bottom plate that faces the top plate with respect to the heat exchanger; a mount plate positioned between the burner and the heat exchanger; and a side plate that faces the mount plate with respect to the heat exchanger, wherein the heat exchanger comprises:
a first tube that forms an entry of the heat exchanger;
a second tube that forms an exit of the heat exchanger and spaced apart from the first tube in a direction crossing the longitudinal direction of the heat exchanger; and
a bend that connects the first tube and the second tube, wherein the plurality of guides is alternately disposed in a direction in which the first tube and the second tube are spaced apart from each other, wherein the first tube and the second tube extend in the longitudinal direction of the heat exchanger, wherein the plurality of guides comprises:
a plurality of lower guides penetrated by the first tube and sequentially arranged along the first tube; and
a plurality of upper guides penetrated by the second tube and sequentially arranged along the second tube, wherein the plurality of lower guides is disposed vertically with respect to the first tube and spaced apart from the second tube, wherein the plurality of upper guides is disposed vertically with respect to the second tube and spaced apart from the first tube, wherein the plurality of upper guides is positioned above a first reference line that extends in the longitudinal direction of the heat exchanger between the first tube and the second tube and intersects a center of the bend, wherein the plurality of lower guides is positioned below the first reference line, wherein a distance between the first reference line and a second reference line that extends in the longitudinal direction of the heat exchanger between the second tube and the top plate and positioned below the top plate is equal to a distance between the first reference line and the bottom plate, and wherein the plurality of upper guides respectively further comprises openings formed to pass through the plurality of upper guides and aligned with the second reference line.

2 . The gas furnace of claim 1 , wherein the bottom plate further comprises a bottom hole formed to penetrate the bottom plate, and wherein the top hole and the bottom hole are formed to extend in the longitudinal direction of the heat exchanger and face each other in a direction in which the first tube and the second tube are spaced apart from each other.

3 . The gas furnace of claim 1 , wherein the side plate further comprises a side hole formed to penetrate the side plate, and wherein the top hole is positioned to be biased toward the mount plate with respect to a center of the blower.

4 . The gas furnace of claim 1 , wherein the plurality of upper guides further comprises upper bending portions bent toward the side plate by an acute angle at lower ends of the plurality of upper guides, respectively.

5 . The gas furnace of claim 4 , wherein the plurality of lower guides further comprises lower bending portions bent toward the mount plate by an acute angle at upper ends of the plurality of lower guides, respectively.

6 . The gas furnace of claim 5 , wherein the upper bending portions are adjacent to the lower bending portions in bending directions of the upper bending portions with respect to the plurality of upper guides, respectively.

7 . The gas furnace of claim 1 , wherein the mount plate is positioned at a lateral side of the heat exchanger, and wherein the plurality of upper guides further comprises:
first protrusions that protrude obliquely in a first lateral direction of the openings from lower ends of the openings; and second protrusions that protrude obliquely in a second lateral direction of the openings from upper ends of the openings.

8 . The gas furnace of claim 1 , wherein the longitudinal direction of the heat exchanger is defined as a first direction, wherein the direction in which the first tube and the second tube are spaced apart from each other is defined as a second direction, wherein a direction orthogonal to the first direction and the second direction is defined as a third direction, and wherein the heat exchanger further comprises a plurality of heat exchangers spaced apart from each other in the third direction.

9 . The gas furnace of claim 8 , wherein the plurality of lower guides extends in the third direction and is penetrated by a plurality of first tubes of the plurality of heat exchangers, and wherein the plurality of upper guides extends in the third direction and is penetrated by a plurality of second tubes of the plurality of heat exchangers.

10 . The gas furnace of claim 9 , wherein the plurality of lower guides further comprises:
a first portion; and a second portion detachably coupled to the first portion in the second direction, and wherein the plurality of first tubes passes through a plurality of through-holes formed between the first portion and the second portion.

11 . The gas furnace of claim 10 , wherein the plurality of through-holes is formed between a plurality of lower grooves of the first portion and a plurality of upper grooves of the second portion, wherein the first portion further comprises a plurality of lower ribs that respectively protrudes in the first direction from the plurality of lower grooves and respectively extends along the plurality of lower grooves, and wherein the second portion further comprises a plurality of upper ribs that respectively protrudes in the first direction from the plurality of upper grooves and respectively extends along the plurality of upper grooves.

12 . The gas furnace of claim 10 , wherein the second portion further comprises a stepped portion that protrudes from one end of the second portion facing the first portion and being stepped with respect to the second portion, wherein the one end of the second portion is seated on one end of the first portion facing the second portion, and wherein the stepped portion is detachably coupled to the first portion.

13 . The gas furnace of claim 10 , wherein the first portion further comprises a pair of legs that extends from the first portion in the second direction and spaced apart from each other in the third direction.

14 . The gas furnace of claim 10 , wherein at least one of the plurality of upper guides is compatible with at least one of the plurality of lower guides.

15 . An air conditioner having an outdoor unit and a ventilator that are connected to each other through a refrigerant pipe, wherein the ventilator comprises:
an air supply fan that forms a flow of air along an air supply passage; an exhaust fan that forms a flow of air along an exhaust passage separated from the air supply passage; a plurality of coils located in the air supply passage and having refrigerant flowing therethrough; and the gas furnace of claim 1 , wherein the gas furnace is positioned downstream of the plurality of coils in the air supply passage.

Assignees

• Lg Electronics Inc

Inventors

• Park Janghee
• Jeong Yongki
• Lee Jinwoo

Classifications

• F24H3/087 Primary

  using fluid fuel · CPC title

• F24F2013/205

  Mounting a ventilator fan therein · CPC title

• F24F3/044

  Systems in which all treatment is given in the central station, i.e. all-air systems · CPC title

• F24F13/20

  Casings or covers · CPC title

• F24F5/0096

  combined with domestic apparatus · CPC title