Method for preventing coagulation in exhaust pipe of boiler

• US 8,202,084 B2
• Filed: 10/17/2007
• Issued: 06/19/2012
• Est. Priority Date: 10/17/2006
• Status: Expired due to Fees

• Current Assignee: Kyungdong Navien Co., Ltd.
• Original Assignee: Kyungdong Navien Co., Ltd.
• Inventors: Kim, Yong Bum
• Primary Examiner(s): Rinehart, Kenneth
• Assistant Examiner(s): Corboy, William
• Application Number:
  US12/445,733
• Publication Number:
  US 20100316963A1
• Time in Patent Office: 1,707 Days
• Field of Search: 431/12, 431/2, 431/5, 454/1, 454/85
• US Class Current: 431/12
• CPC Class Codes: F23N 1/002 using electronic means F23N1/04 - F23N1/10 take precedence
• CPC Class Codes: F23N 2225/13 outdoor temperature
• CPC Class Codes: F23N 2225/14 Ambient temperature around burners
• CPC Class Codes: F23N 2225/20 entrant temperature
• CPC Class Codes: F23N 2231/24 Freezing
• CPC Class Codes: F23N 2237/10 High or low fire
• CPC Class Codes: F23N 2241/06 Space-heating and heating water
• CPC Class Codes: F23N 5/02 using devices responsive to thermal changes or to thermal expansion of a medium
• CPC Class Codes: F24H 8/006 Means for removing condensate from the heater
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

A method for preventing coagulation in an exhaust pipe of a boiler is provided. The method includes proportionally controlling combustion based on a quantity of supplied fuel with respect to an amount of air supplied to a burner, determining whether to enhance a heating power of a burner, based on a temperature of ambient air introduced into a blower, the temperature of the ambient air being sensed by an air temperature sensor, and enhancing the heating power of the burner to increase a temperature of exhaust gas, when it is determined that the sensed temperature is equal to or lower than a predetermined temperature.

Claims

1. A method for preventing coagulation in an exhaust pipe of a boiler, the method comprising:

controlling combustion proportionally based on a quantity of supplied fuel with respect to an amount of air supplied to a burner;

determining whether to enhance a heating power of a burner, based on a temperature of ambient air introduced into a blower, the temperature of the ambient air being sensed by an air temperature sensor; and

enhancing the heating power of the burner to increase a temperature of exhaust gas, when it is determined that the sensed temperature is equal to or lower than a predetermined temperature,

wherein the determining whether to enhance the heating power of the burner comprises determining if the burner has been operated during a predetermined time interval while consuming a predetermined quantity of fuel.

2. The method according to claim 1, wherein the proportionally controlling combustion is executed when a combustion time duration of the enhanced heating power of the burner exceeds a predetermined time interval.

3. The method according to claim 2, wherein the enhancing the heating power of the burner is executed for at least one predetermined period of time corresponding to at least one range of ambient air temperatures.

4. The method according to claim 2, wherein the enhancing the heating power of the burner includes enhancing the heating power of the burner with a maximum heating power.