Separate flow path type of gas-air mixing device

Patent metadata

Field	Value
Publication number	US-9364799-B2
Application number	US-201113979082-A
Country	US
Kind code	B2
Filing date	Dec 20, 2011
Priority date	Mar 25, 2011
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

According to the present invention, a gas-air mixing device used in a gas boiler includes: a gas supply tube branched into a first gas flow path and a second gas flow path; an air supply tube branched into a first air flow path and a second air flow path by means of an air-flow-path branching apparatus; a pressure valve which is connected to the inlet side of the gas supply tube in order to adjust the supply rate of gas being supplied to the gas supply tube; and a drive unit in which two valve bodies are connected to a rod that moves vertically up and down due to the magnetic force of an electromagnet; and the air-flow-path branching apparatus is formed to have a slot that connects to either the first air flow path or the second air flow path, and has a joining part which the rod can pass through in a position corresponding to the slot.

First claim

The invention claimed is:

1. A gas-air mixing device used in a gas boiler, comprising:
a gas supply tube branched into a first gas flow path and a second gas flow path;
an air supply tube branched into a first air flow path and a second air flow path by an air flow path branching apparatus;
a pneumatic valve connected to an inlet portion of the gas supply tube in order to control a gas supply rate supplied to the gas supply tube; and
a drive unit having two valve bodies connected to a rod that moves vertically up and down by magnetic force of an electromagnet,
wherein the air flow path branching apparatus includes a slot which is communicatable with any one air flow path of the first air flow path and the second air flow path and a joining part through which the rod is able to pass through at a position corresponding to the slot.

2. The gas-air mixing device of claim 1 , wherein the air flow path branching apparatus comprises two air flow path guides.

3. The gas-air mixing device of claim 1 , wherein the two valve bodies are controlled to close both any one of the first gas flow path or the second gas flow path and the slot in a low-output mode.

4. The gas-air mixing device of claim 1 , wherein each of the first and second gas flow paths includes a nozzle installed, respectively, at an outlet portion thereof.

5. The gas-air mixing device of claim 4 , wherein hole sizes of the nozzles of the first and second gas flow paths are different from each other.

6. The gas-air mixing device of claim 4 , wherein the nozzles of the first and second gas flow paths are arranged in parallel to each other.

7. The gas-air mixing device of claim 1 , further comprising a main valve, which is an on/off valve and operates as an opening/closing valve, wherein the main valve is connected to the inlet portion of the gas supply tube.

8. The gas-air mixing device of claim 1 , further comprising a blower for supplying air required for combustion, wherein the blower is connected to an outlet portion of the air supply tube.

9. A gas-air mixing device used in a gas boiler, comprising:
a gas supply tube including a first gas flow path and a second gas flow path;
an air supply tube connected to the gas supply tube and including a first air flow path disposed at an upper side of the air supply tube and a second air flow path disposed at a lower side of the air supply tube;
an air flow path branching apparatus for dividing the first air flow path and the second air flow path within the air supply tube;
a drive unit disposed within the air supply tube and having a rod that moves vertically up and down and a valve body connected to the rod,
wherein the first gas flow path extends up to a boundary of the first air flow path and the second air flow path and is connected to the air flow path branching apparatus, and
wherein the drive unit is configured such that the first gas flow path and the first air flow path are simultaneously opened or blocked by the valve body according to a movement of the rod.

10. The gas-air mixing device of claim 9 , wherein the air flow path branching apparatus includes two air flow path guides that respectively extend in left and right directions along the longitudinal direction of the air supply tube, and wherein the first gas flow path is connected to the two air flow path guides.

Assignees

• Son Seung Kil
• Kyungdong Navien Co Ltd

Inventors

• Son Seung Kil

Classifications

• F23N2233/08

  with variable speed · CPC title

• F23N2235/06

  at the air intake · CPC title

• F23N2235/18

  Groups of two or more valves · CPC title

• F23D14/62

  Mixing devices; Mixing tubes · CPC title

• F23N1/005

  using electrical or electromechanical means (F23N1/04 - F23N1/10 take precedence) · CPC title