Gas fired modular blower control and associated methodology

• US 9,651,268 B2
• Filed: 03/07/2014
• Issued: 05/16/2017
• Est. Priority Date: 03/11/2013
• Status: Active Grant

• Current Assignee: Rheem Manufacturing Company (Paloma Co., Ltd.)
• Original Assignee: Rheem Manufacturing Company (Paloma Co., Ltd.)
• Inventors: Branson, Michael W., Kleman, Kelvin W., Hawkins, Timothy B., Jakobs, Diane M.
• Primary Examiner(s): Huson, Gregory
• Assistant Examiner(s): Namay, Daniel E
• Application Number:
  US14/200,938
• Publication Number:
  US 20140252100A1
• Time in Patent Office: 1,166 Days
• Field of Search: 237 2 B, 237 2 A, 237 81, 236 1 C, 236 91 D
• CPC Class Codes: F24D 12/02 having more than one heat source using heat pumps, in water central heating systems F24D3/18; in air central heating systems F24D5/12; in systems using heat storage masses F24D11/02
• CPC Class Codes: F24D 19/1087 system using a heat pump
• CPC Class Codes: F24D 2200/04 Gas or oil fired boiler
• CPC Class Codes: F24D 2200/12 Heat pump
• CPC Class Codes: F24D 5/12 using heat pumps
• CPC Class Codes: F24F 11/46 Improving electric energy efficiency or saving
• CPC Class Codes: F24F 2221/34 Heater, e.g. gas burner, electric air heater
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]
• CPC Class Codes: Y02B 30/13 Hot air central heating systems using heat pumps

Abstract

An air heating and cooling system includes (1) a heat pump, illustratively devoid of auxiliary electric resistance type air heating structure, operative to provide refrigerant-based heating or cooling of air being delivered to a conditioned space, (2) a fuel-fired modular blower selectively operable to generate combustion heat, and (3) a control system associated with the heat pump and the modular blower. The control system has a heat pump thermostat electrically connected to a modular blower control and operative to transmit to the modular blower a first signal indicative of heating operation of the heat pump, and a second signal indicative of a need for alternative heat during a heating demand cycle. The modular blower is operative, in response to receiving both signals, to provide combustion-based air heating in place of refrigerant-based heat pump air heating.

Claims

1. A heat pump system comprising:

a reversible refrigerant circuit heat pump operable in heating and cooling modes to selectively heat or cool air being delivered to a conditioned space;

a fuel-fired modular blower selectively operable to generate combustion heat; and

a control system associated with said heat pump and said modular blower and having a heat pump thermostat electrically connected to a modular blower control,

said heat pump thermostat being operative to transmit to said modular blower control (1) a first signal indicative of heating operation of said heat pump, and (2) a second signal indicative of a need for alternative heat during a heating demand cycle, and

said modular blower control being operative, in response to receipt of both of said first and second signals, to cause said fuel-fired modular blower to generate combustion heat in place of refrigerant-based air heating of said heat pump;

wherein said modular blower control, in response to receipt of both of said first and second signals, is operative to cause said fuel-fired modular blower to generate said combustion heat to replace refrigerant-based air heating of said heat pump during heating operation thereof, unless the outside ambient temperature is not less than a predetermined temperature.

2. The heat pump system of claim 1 wherein:

said fuel-fired modular blower is a non-condensing fuel-fired modular blower.

3. The heat pump system of claim 2 wherein:

said non-condensing fuel-fired modular blower is a non-condensing gas-fired modular blower.

4. The heat pump system of claim 1 wherein:

said heat pump has an indoor heat pump coil unit with an indoor refrigerant coil therein, and

said fuel-fired modular blower is operative to discharge air therefrom that flows across said indoor refrigerant coil.

5. The heat pump system of claim 4 wherein:

said indoor heat pump coil unit rests atop said fuel-fired modular blower.

6. The heat pump system of claim 1 wherein:

said reversible refrigerant heat pump has an indoor heat pump coil unit and an outdoor unit,

said heat pump thermostat is remotely located indoors from said indoor heat pump coil unit,

said modular blower control is carried by said fuel-fired modular blower, and

said outdoor unit has a heat pump control mounted thereon and electrically coupled to said heat pump thermostat and said modular blower control.

7. The heat pump system of claim 6 wherein:

said fuel-fired modular blower has a blower section and a heating section, and

said modular blower controller is carried by said blower section.

8. The heat pump system of claim 1 wherein:

said heat pump has a refrigerant circuit with a reversing valve therein, and

said first signal is indicative of said reversing valve having been switched to its heating orientation in said refrigerant circuit.

9. The heat pump system of claim 1, comprising a heat pump controller in communication with the heat pump thermostat, the heat pump controller being configured to communicate a control signal to the heat pump thermostat indicative of the heating operation of the heat pump.

10. The heat pump system of claim 9, wherein the heat pump thermostat is configured to communicate the control signal received from the heat pump controller to the modular blower control as the first signal.

11. A heating method comprising the steps of:

providing a reversible refrigerant circuit heat pump having a heat pump thermostat operatively associated therewith;

providing a fuel-fired modular blower having a modular blower control associated therewith;

transmitting to said modular blower control from said heat pump thermostat first and second signals respectively indicative of heating operation of said heat pump, and a need of said heat pump for supplemental heating during said heating operation thereof; and

,

in response to said modular blower control receiving both of said first and second signals, and only during heating operation of said heat pump, causing said modular blower control to operate said fuel-fired modular blower in a manner replacing refrigerant heat created by said heat pump with combustion heat created by said fuel-fired modular blower;

wherein said causing step is performed unless the outdoor ambient temperature is not less than a predetermined temperature.

12. The heating method of claim 11 wherein:

said step of providing a fuel-fired modular blower is performed by providing a non-condensing fuel-fired modular blower.

13. A system for selectively heating or cooling air being delivered to a conditioned space, comprising;

a heat pump having a reversible refrigerant circuit and being devoid of electrical resistance type air heating structure;

a heat pump control associated with the heat pump and providing control signals to the heat pump;

a fuel-fired supplemental heating source selectively operable to generate combustion heat;

a modular supplemental heating source control associated with the fuel fired supplemental heating source and providing control signals to the fuel fired supplemental heating source; and

a control system including both the heat pump control and the modular supplemental heating source control for automatically terminating refrigerant-based heat pump air heating, and replacing it with combustion-based air heating by said fuel-fired supplemental heating source, in response to the modular supplemental heating source control receiving signals indicative of both (1) heating operation of said heat pump, and (2) an inability of said refrigerant-based air heating of said heat pump to sufficiently heat air being delivered to the conditioned space;

wherein said control system is operative to replace refrigerant-based air heating by said heat pump with combustion-based air heating by said fuel-fired supplemental heating source only if the outside ambient temperature is at or above a predetermined temperature.

14. The system of claim 13 wherein:

said fuel-fired supplemental heating source is a fuel-fired modular blower.

15. The system of claim 14 wherein:

said fuel-fired modular blower is a non-condensing fuel-fired modular blower.

16. The system of claim 15 wherein:

said non-condensing fuel-fired modular blower is a non-condensing gas-fired modular blower.

17. The system of claim 13 wherein:

said heat pump has a reversing valve in said reversible refrigerant circuit, and

said detecting by said control system of heating operation of said heat pump is performed by detecting that said reversing valve has been switched to its heating orientation in said reversible refrigerant circuit.

18. An air heating method comprising the steps of:

providing a reversible refrigerant circuit heat pump devoid of electrical resistance type air heating structure and operative to utilize refrigerant-based heat to heat air operatively flowing through said heat pump, the heat pump including a heat pump control;

providing a fuel-fired supplemental heating source operative to generate combustion heat, the supplemental heating source including a modular supplemental heating source control;

receiving at the modular supplemental heating source control signals indicative of both (1) heating operation of said heat pump, and (2) an inability of said refrigerant-based air heating of said heat pump to sufficiently heat air being delivered to the conditioned space; and

terminating refrigerant-based heat pump air heating, and replacing it with combustion-based air heating by said fuel-fired supplemental heating source, in response to a sensed inability of said refrigerant-based heat of said heat pump to sufficiently heat air operatively flowing through said heat pump during a heating demand cycle thereof;

wherein said terminating step is performable only during periods when the outdoor ambient temperature is not less than a predetermined temperature.

19. The air heating method of claim 18 wherein:

said step of providing a fuel-fired supplemental heating source is performed by providing a fuel-fired modular blower.

20. The air heating method of claim 19 wherein:

said step of providing a fuel-fired modular blower is performed by providing a non-condensing type fuel-fired modular blower.

21. The air heating method of claim 20 wherein:

said step of providing a non-condensing type fuel-fired modular blower is performed by providing a non-condensing type gas-fired modular blower.