US Patent No: 5,203,179
Number of patents in Portfolio can not be more than 2000
Control system for an air conditioning/refrigeration system
Stats
-
Apr 20, 1993
Issued date -
Mar 4, 1992
filing date -
07/845,675
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
A microprocessor-based air conditioning/refrigeration control system adapted for use with a variable speed compressor measures acceleration of the compressor and the temperature or pressure of the refrigerant exiting therefrom, determines the rate of change of the temperature or pressure of the refrigerant, and decreases acceleration of the compressor if the rate of change of the temperature or pressure of the working fluid indicates surging of the compressor. Superheat of the refrigerant is maintained at a first predefined level while the compressor is operating at constant speed and is increased to a second, higher predefined level while the compressor is accelerating. The system is able to diagnose deterioration of the compressor by measuring and comparing power input to the compressor and rate of change of temperature or pressure of the refrigerant at the compressor between initial and subsequent periods, and differentiate between deterioration of a drive component or a pressurizing component of the compressor.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 4,362,030 Refrigeration circuit | 10 | 1981 | |
| 4,514,991 Variable speed drive motor system with inverter control | 28 | 1983 | |
| 4,527,399 High-low superheat protection for a refrigeration system compressor | 26 | 1984 | |
| 4,535,607 Method and control system for limiting the load placed on a refrigeration system upon a recycle start | 12 | 1984 | |
| 4,538,422 Method and control system for limiting compressor capacity in a refrigeration system upon a recycle start | 16 | 1984 | |
| 4,616,483 Diffuser wall control | 19 | 1985 | |
| 4,734,628 Electrically commutated, variable speed compressor control system | 29 | 1986 | |
| 4,938,029 Unloading system for two-stage compressors | 12 | 1989 | |
|
|
|||
| 4,566,289 Refrigerator control system | 32 | 1984 | |
| 4,603,556 Control method and apparatus for an air conditioner using a heat pump | 8 | 1985 | |
| 4,662,185 System of controlling refrigerator temperature | 31 | 1986 | |
| 4,870,833 Car air conditioning apparatus and controlling method therefor | 17 | 1987 | |
| 4,877,081 Air-conditioning apparatus for automobiles | 9 | 1989 | |
|
|
|||
| 4,722,196 Device for controlling refrigeration cycle capacity | 11 | 1986 | |
| 4,738,118 Air conditioner | 15 | 1987 | |
| 4,798,057 Refrigerating apparatus and control method thereof | 10 | 1987 | |
| 5,157,934 Controller for electrically driven expansion valve of refrigerating cycle | 12 | 1991 | |
|
|
|||
| 4,689,967 Control and method for modulating the capacity of a temperature conditioning system | 22 | 1985 | |
| 4,715,190 Control and method for modulating the capacity of a temperature conditioning system | 17 | 1987 | |
| 4,856,286 Refrigeration compressor driven by a DC motor | 57 | 1988 | |
|
|
|||
| 4,582,124 Automotive air conditioning system with automatic control of refrigerator compressor capacity and heater air mixing damper | 23 | 1985 | |
| 4,646,535 Temperature and pressure monitored refrigeration system | 32 | 1985 | |
|
|
|||
| 4,646,532 Expansion valve | 13 | 1985 | |
| 4,914,924 Vehicle air conditioning system based on fuzzy inference | 45 | 1988 | |
|
|
|||
| 4,794,762 Refrigerant flow control system | 18 | 1987 | |
|
|
|||
| 4,667,480 Method and apparatus for controlling an electrically driven automotive air conditioner | 101 | 1986 | |
|
|
|||
| 4,930,320 Cooling fan controlling apparatus for vehicle with air conditioner | 9 | 1989 | |
|
|
|||
| 4,689,968 Actuator means for the control of a refrigeration system expansion valve | 8 | 1986 | |
|
|
|||
| 4,821,527 Cooling device equipped with a variable displacement type compressor | 6 | 1987 | |
|
|
|||
| 4,765,150 Continuously variable capacity refrigeration system | 27 | 1987 | |
|
|
|||
| 4,753,083 Device for controlling the capacity of a variable capacity compressor | 30 | 1987 | |
|
|
|||
| 4,745,767 System for controlling flow rate of refrigerant | 47 | 1987 | |
|
|
|||
| 4,283,920 Refrigerating device | 17 | 1979 | |
|
|
|||
| 4,407,139 Method for controlling an air conditioning system | 32 | 1981 | |
|
|
|||
| 4,571,951 Electronic control for expansion valve in refrigeration system | 29 | 1984 | |
|
|
|||
| 4,858,676 Airconditioning system for a vehicle | 33 | 1988 | |
|
|
|||
| 5,065,590 Refrigeration system with high speed, high frequency compressor motor | 11 | 1990 | |
|
|
|||
| 4,546,618 Capacity control systems for inverter-driven centrifugal compressor based water chillers | 22 | 1984 | |
|
|
|||
| 4,660,387 Controls for refrigerating or air-conditioning units | 14 | 1986 | |
|
|
|||
| 4,679,404 Temperature responsive compressor pressure control apparatus and method | 31 | 1986 | |