Heat pump operating in the heating mode refrigerant pressure control
First Claim
1. A heat pump operating in its heating cycle mode of a type having at least one refrigerant circuit wherein each said refrigerant circuit comprises a compressor, a condenser, an evaporator, and a refrigerant;
- and at least one motor driven evaporator fan in an air circulation relationship with at least one said evaporator, wherein each said evaporator is in said relationship with at least one said motor driven evaporator fan; and
comprising;
a sensor that produces an electrical signal that varies in accordance with one of the pressure and temperature of said refrigerant on a discharge side of the compressor for at least one said refrigerant circuit; and
speed control means for controlling the speed of at least one of said at least one motor driven evaporator fan in response to said electrical signal;
wherein said speed control means controls one of the pressure and temperature of at least one of said at least one refrigerant circuit.
1 Assignment
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Accused Products
Abstract
In a heat pump system operating in the heat cycle mode, a sensor is provided for sensing either the pressure or temperature of a refrigerant. A speed controller receives an output of the sensor so that the speed (including cycle rate) of an evaporator fan is controlled, resulting in control of the pressure or temperature of the refrigerant. The temperature or pressure of the refrigerant is controlled for a heat pump system comprising one refrigeration circuit and more than one refrigeration circuit. A separate speed control is provided for a fixed speed motor, a sleeve bearing fan motor, and a variable speed ball bearing fan motor.
98 Citations
17 Claims
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1. A heat pump operating in its heating cycle mode of a type having at least one refrigerant circuit wherein each said refrigerant circuit comprises a compressor, a condenser, an evaporator, and a refrigerant;
- and at least one motor driven evaporator fan in an air circulation relationship with at least one said evaporator, wherein each said evaporator is in said relationship with at least one said motor driven evaporator fan; and
comprising;a sensor that produces an electrical signal that varies in accordance with one of the pressure and temperature of said refrigerant on a discharge side of the compressor for at least one said refrigerant circuit; and speed control means for controlling the speed of at least one of said at least one motor driven evaporator fan in response to said electrical signal; wherein said speed control means controls one of the pressure and temperature of at least one of said at least one refrigerant circuit. - View Dependent Claims (2, 3, 4, 5)
- and at least one motor driven evaporator fan in an air circulation relationship with at least one said evaporator, wherein each said evaporator is in said relationship with at least one said motor driven evaporator fan; and
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6. A heat pump operating in its heating cycle mode of a type having at least one refrigerant circuit wherein each said refrigerant circuit comprises a compressor, a condenser, an evaporator, and a refrigerant;
- and at least one motor driven evaporator fan, having an on power state and an off power state, that is in an air circulation relationship with at least one said evaporator, and comprising;
a sensor that produces an electrical signal that varies in accordance with one of the pressure and temperature of said refrigerant on a discharge side of the compressor for each at least one said refrigerant circuit; and cycling means for sequentially cycling power to at least one of said at least one motor driven evaporator fans between the off power state and the on power state in response to said electrical signal; wherein said cycling means controls one of the pressure and temperature of at least one of said at least one refrigerant circuit. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
- and at least one motor driven evaporator fan, having an on power state and an off power state, that is in an air circulation relationship with at least one said evaporator, and comprising;
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14. A heat pump operating in its heating cycle mode of a type having at least one refrigerant circuit comprising a compressor, a condenser, an evaporator, and a refrigerant;
- and at least one variable speed motor driven evaporator fan in an air circulation relationship with at least one said evaporator, wherein each said evaporator is in said relationship with at least one said motor driven evaporator fan, and comprising;
a sensor that produces an electrical signal that varies in accordance with one of the pressure and temperature of said refrigerant on a discharge side of the compressor for each said refrigerant circuit; and
speed control means for controlling the speed of at least one of said variable speed motor driven evaporator fans in response to said electrical signal;wherein said speed control means control one of the pressure and temperature of at least one of said at least one refrigerant circuit. - View Dependent Claims (15, 16, 17)
- and at least one variable speed motor driven evaporator fan in an air circulation relationship with at least one said evaporator, wherein each said evaporator is in said relationship with at least one said motor driven evaporator fan, and comprising;
Specification