Air/gas admittance device for a combustion appliance
First Claim
Patent Images
1. An air/gas admittance device for use with a combustion unit, the air/gas admittance device comprising:
- a body having a side wall defining a passageway that extends from an air inlet to an air/gas outlet;
a gas pipe having a side wall defining a passageway that extends from a gas inlet to a gas outlet;
the side wall of the body having a gas pipe opening that is in fluid communication with the gas outlet of the gas pipe;
an air flow restrictor positioned in the body between the gas pipe opening and the air inlet;
a gas flow restrictor positioned in the gas pipe downstream of the gas inlet;
a first pressure port in the side wall of the body, upstream of the gas pipe opening, the first pressure port configured to be operatively coupled to a first pressure sensor for measuring a pressure of air within the body;
a second pressure port in the side wall of the gas pipe, the second pressure port configured to be operatively coupled to a second pressure sensor for measuring a pressure of gas within the gas pipe; and
an air flow smoothing insert positioned in the body upstream of the first pressure port.
1 Assignment
0 Petitions
Accused Products
Abstract
An improved air/gas admittance device for a combustion appliance. The improved air/gas admittance device is configured to provide a more uniform gas and/or air flow. This may help reduce noise in pressure and/or flow sensor measurements that are used by a gas valve controller to control the air/fuel ratio to the combustion appliance, which may help improve the efficiency and/or emissions of the combustion appliance.
46 Citations
20 Claims
-
1. An air/gas admittance device for use with a combustion unit, the air/gas admittance device comprising:
-
a body having a side wall defining a passageway that extends from an air inlet to an air/gas outlet; a gas pipe having a side wall defining a passageway that extends from a gas inlet to a gas outlet; the side wall of the body having a gas pipe opening that is in fluid communication with the gas outlet of the gas pipe; an air flow restrictor positioned in the body between the gas pipe opening and the air inlet; a gas flow restrictor positioned in the gas pipe downstream of the gas inlet; a first pressure port in the side wall of the body, upstream of the gas pipe opening, the first pressure port configured to be operatively coupled to a first pressure sensor for measuring a pressure of air within the body; a second pressure port in the side wall of the gas pipe, the second pressure port configured to be operatively coupled to a second pressure sensor for measuring a pressure of gas within the gas pipe; and an air flow smoothing insert positioned in the body upstream of the first pressure port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. An air/gas admittance device for use with a combustion unit, the air/gas admittance device comprising:
-
a body having a side wall defining a passageway that extends from an air inlet to an air/gas outlet; a gas pipe having a side wall defining a passageway that extends from a gas inlet to a gas outlet; the side wall of the body having a gas pipe opening that is in fluid communication with the gas outlet of the gas pipe; an air flow restrictor positioned in the body between the gas pipe opening and the air inlet; an air flow smoothing insert positioned in the body upstream of the gas pipe opening; and a fan in fluid communication with the air/gas outlet, the fan configured to generate an under pressure at the air/gas outlet. - View Dependent Claims (15, 16, 17, 18)
-
-
19. An air/gas admittance device for use with a combustion unit, the air/gas admittance device comprising:
-
a body having a side wall defining a passageway that extends from an air inlet to an air/gas outlet; a gas pipe having a side wall defining a passageway that extends from a gas inlet to a gas outlet; the side wall of the body having a gas pipe opening that is in fluid communication with the gas outlet of the gas pipe; a first pressure port in the side wall of the body, upstream of the gas pipe opening; a first pressure sensor operatively coupled to the first pressure port for measuring a pressure of air within the body; a second pressure port in the side wall of the gas pipe; a second pressure sensor operatively coupled to the second pressure port for measuring a pressure of gas within the gas pipe; an air flow smoothing insert positioned in the body upstream of the first pressure port; a gas control valve coupled to the gas inlet; and a controller operatively coupled to the first pressure sensor, the second pressure sensor and the gas control valve, the controller is configured to use the pressure of air within the body sensed by the first pressure sensor and the pressure of gas within the gas pipe sensed by the second pressure sensor to control the gas valve to produce a desired air/gas mixture at the air/gas outlet. - View Dependent Claims (20)
-
Specification