US 10,443,840 B2Granted

Reversible draft controllers and exhaust systems incorporating same

AssigneeRM Manifold Group, Inc.

InventorTimothy Edward McNulty

Life of this patent

Estimating the term…

Loading patent…

Abstract

Reversible draft controllers and exhaust systems incorporating reversible draft controllers are disclosed. One system for controlling draft in a chimney includes a sensor for determining condition data, an axial fan blade, an electronically commutated motor (ECM), and a controller. The ECM is configured to rotate the fan blade in a first direction to increase draft in the chimney and in a second, opposite direction to decrease draft. The controller has a processor and a program of instructions executable by the processor to perform steps for controlling draft in the chimney with the fan blade. The steps include: comparing condition data from the sensor to set point data to determine if an intervention is required; addressing insufficient draft by actuating the ECM to rotate the axial fan blade in the first direction; and addressing excessive draft by actuating the ECM to rotate the fan blade in the second direction.

Claims20

Dependent claims

A system for controlling draft in a chimney, comprising:

a sensor for determining condition data relating to the draft in the chimney;
an axial fan blade;
an electronically commutated motor (ECM) configured to rotate the axial fan blade in a first direction to increase the draft in the chimney and to rotate the axial fan blade in a second direction to decrease the draft in the chimney, the second direction being opposite to the first direction;
and
a controller having a processor and a program of instructions executable by the processor to perform method steps for controlling the draft in the chimney with the axial fan blade, the method steps comprising:
(a) comparing condition data relating to the draft in the chimney from the sensor to set point data to determine if the draft in the chimney is outside a predetermined amount of draft such that the draft in the chimney is insufficient or excessive;
(b) addressing insufficient draft in the chimney by actuating the ECM to rotate the axial fan blade in the first direction;
and
(c) addressing excessive draft in the chimney by actuating the ECM to rotate the axial fan blade in the second direction.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/469,859Filed 11 May 2012 · us provisional application
Priority: 12 May 2011
Published: US 2012/0289138 A115 Nov 2012
Granted: 15 Oct 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F23L 17/00
Inducing draught
F04D 27/004
Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids: by varying driving speed
F23J 11/12
Devices for conducting smoke or fumes, e.g. flues: smoke conduit systems for factories or large buildings
Y02B 30/70
Energy efficient heating, ventilation or air conditioning [HVAC]: efficient control or regulation technologies, e.g. for control of refrigerant…