Proportional control system for a motor

• US 20060151165A1
• Filed: 08/18/2003
• Published: 07/13/2006
• Est. Priority Date: 08/16/2002
• Status: Abandoned Application

• Current Assignee: Imperial Sheet Metal Limited
• Original Assignee: Imperial Sheet Metal Limited
• Inventors: Poirier, Bertrand
• Application Number:
  US10/525,582
• Publication Number:
  US 20060151165A1
• Time in Patent Office: Days
• US Class Current: 165/247
• CPC Class Codes: F24F 11/41 Defrosting; Preventing freezing
• CPC Class Codes: F24F 11/77 by controlling the speed of ventilators
• CPC Class Codes: F24F 12/006 using an air-to-air heat exchanger F24F12/002 takes precedence
• CPC Class Codes: F24F 2012/007 using a by-pass for bypassing the heat-exchanger
• CPC Class Codes: F24F 2110/12 of the outside air
• CPC Class Codes: Y02B 30/56 Heat recovery units
• CPC Class Codes: Y02B 30/70 Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The present invention provides a proportional control system for use in an HVAC unit within a ventilation system comprising a processing means programmed with an air exchange-defrost cycle. One or more motor speed sensing means are also positioned in the HVAC unit and operatively connected to the processing means and one or more temperature sensing means are positioned in the HVAC unit and operatively connected to the processing means wherein the temperature and motor speed sensors determine the motor speed to be applied during the defrost cycle.

Claims

1. A proportional control system for use in an HVAC unit within a ventilation system comprising:

a) a processing means programmed with an air exchange-defrost cycle;

b) one or more motor speed sensing means positioned in the HVAC unit and operatively connected to the processing means; and

c) one or more temperature sensing means positioned in the HVAC unit and operatively connected to the processing means

wherein the temperature and motor speed sensors determine the motor speed to be applied during the defrost cycle.

2. The proportional control system of claim 1 wherein a first temperature sensing means is positioned the fresh air inlet intake of the HVAC unit.

3. The proportional control system of claim 1 wherein a first speed sensing means is positioned on the fresh air intake impeller.

4. The proportional control system of claim 1 wherein a second sensing means is positioned in the stale air intake of the HVAC unit.

5. The proportional control system of claim 1 wherein a damper mechanism is installed in the air inlet intake of an HVAC unit.

6. A proportional control system for use in an HVAC unit within a ventilation system comprising:

a) a processing means programmed with an air exchange-defrost cycle;

b) one or more sensing means positioned in the HVAC unit and operatively connected to the processing means; and

c) a damper mechanism positioned in the HVAC unit;

wherein the temperature sensing means determine the motor speed to be applied during the defrost cycle.

7. The proportional control system of claim 6 wherein a first temperature sensing means is positioned in the air inlet intake of the HVAC unit.

8. The proportional control system of claim 6 wherein a motor speed sensor is incorporated within the processing means.

9. The proportional control system of claim 6 wherein a damper mechanism is installed in the air inlet intake of an HVAC unit.