Two step power output motor and associated HVAC systems and methods
First Claim
1. A method for operating a system for conditioning a space, the system including a compressor with an electrical motor, an expansion valve, a condenser, an air mover with an electrical motor, and an evaporator, said method including the steps of:
- sensing the condition of the space to be treated;
operating the compressor at a first preselected and fixed speed when the sensed condition indicates that the system should be operated at a maximum load;
operating the compressor at a second preselected and fixed speed, lower than the first speed, when the sensed condition indicates that the system should be operated at a lesser load; and
driving the motor of the air mover by line current when the compressor operates at the first preselected speed and by a second source of fixed power at a frequency lower than the frequency of the line current, when the compressor operates at the second preselected speed.
7 Assignments
0 Petitions
Accused Products
Abstract
An electrical control system for an induction motor for achieving optimum efficiency at both full and partial loads at markedly reduced electrical components costs while maximizing reliability over the range of load, and for achieving a two step motor power output in a greatly simplified manner, the circuit having an electrical induction motor adapted for connection to line electrical power at maximum motor operating frequency, and to a second source of electrical power at approximately one half of the maximum operating frequency, wherein an electrical switch is provided for selectively connecting each power source to the motor, wherein the second source is a reduced frequency wave form generator for producing a reduced frequency wave form.
-
Citations
17 Claims
-
1. A method for operating a system for conditioning a space, the system including a compressor with an electrical motor, an expansion valve, a condenser, an air mover with an electrical motor, and an evaporator, said method including the steps of:
-
sensing the condition of the space to be treated;
operating the compressor at a first preselected and fixed speed when the sensed condition indicates that the system should be operated at a maximum load;
operating the compressor at a second preselected and fixed speed, lower than the first speed, when the sensed condition indicates that the system should be operated at a lesser load; and
driving the motor of the air mover by line current when the compressor operates at the first preselected speed and by a second source of fixed power at a frequency lower than the frequency of the line current, when the compressor operates at the second preselected speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A system for conditioning a space, said system comprising:
-
a compressor having a motor;
a blower having a motor;
a sensor for sensing the condition of the space;
a first source of electrical power in the form of line power;
an electrical device connected with the line power for developing a second source of electrical power having a second preselected frequency different than the frequency of the line power; and
a switching device for selectively connecting the blower motor and the compressor motor to either the first source of electrical power or to the frequency wave form generator depending upon the sensed condition of the space. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
Specification