US Patent No: 5,271,238
Number of patents in Portfolio can not be more than 2000
Environmental control system
Stats
-
Dec 21, 1993
Issued date -
Jul 1, 1992
filing date -
07/908,779
serial no -
Expired
status
Importance
Loading Importance Indicators...
Abstract
An environmental control system disclosed includes a refrigeration loop including a two stage centrifugal compressor having an inlet and an outlet, a condenser having an inlet connected with the compressor outlet and an outlet, and an evaporator having an inlet connected with said condenser outlet and an outlet connected with the compressor inlet, a motor for rotating the compressor, control means responsive to evaporator load for establishing the rate of rotating said compressor, a controllable expansion valve in communication with the refrigeration loop, an expansion valve control to control the setting of the expansion valve, a bypass valve in communication with the refrigeration loop and also in communication with one stage of the compressor, wherein the bypass valve is selectively openable to allow circulated refrigerant to be variably communicated to the stage in communication therewith, and wherein the setting of the expansion valve is also a function of bypass valve operation.
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 | 28 | 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 | 13 | 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 | |
|
|
|||
| 4,689,967 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 | |
|
|
|||
| 4,722,196 Device for controlling refrigeration cycle capacity | 11 | 1986 | |
| 4,738,118 Air conditioner | 15 | 1987 | |
|
|
|||
| 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 | |
|
|
|||
| 4,794,762 Refrigerant flow control system | 18 | 1987 | |
|
|
|||
| 4,667,480 Method and apparatus for controlling an electrically driven automotive air conditioner | 102 | 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 | |
|
|
|||
| 4,213,307 Oil separation and return system for centrifugal refrigerant compressors | 15 | 1978 | |
|
|
|||
| 4,914,924 Vehicle air conditioning system based on fuzzy inference | 45 | 1988 | |
|
|
|||
| 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 | |
|
|
|||
| 4,819,441 Temperature controller for a transport refrigeration system | 18 | 1987 | |
|
|
|||
| 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 | |
|
|
|||
| 4,546,618 Capacity control systems for inverter-driven centrifugal compressor based water chillers | 22 | 1984 | |
|
|
|||
| 4,679,404 Temperature responsive compressor pressure control apparatus and method | 31 | 1986 | |
| 4,789,057 Tamper resistant containers | 3 | 1988 | |