US Patent No: 6,318,100
Number of patents in Portfolio can not be more than 2000
Integrated electronic refrigerant management system
Stats
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Nov 20, 2001
Issued date -
Apr 14, 2000
filing date -
09/549,867
serial no -
In Force
status
Importance
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Abstract
A process and method for monitoring and selectively controlling the capacity and power demand within a transport unit is disclosed. Specifically, the present invention teaches the combined controls of an electronic suction modulation valve, and electronic expansion valve, and/or an electronic hot gas valve in communication with a microcontroller and a number of sensors in order to monitor and control power consumption and capacity, preferably without the use or presence of compressor unloaders, mechanical throttling devices, or other mechanical power control devices.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,240,263 Refrigeration system - method and apparatus | 3 | 1979 | |
| 4,295,344 Refrigeration unit with water | 3 | 1979 | |
| 4,319,459 Refrigeration machine and a method of charging the same | 5 | 1980 | |
| 4,335,580 Refrigeration unit with water cooled condenser | 4 | 1981 | |
| 5,016,447 Oil return for a two-stage compressor having interstage cooling | 13 | 1990 | |
| 5,193,353 High capacity hot gas heating system for transport refrigeration system | 12 | 1991 | |
| 5,197,297 Transport refrigeration system having compressor over-temperature protection in all operating modes | 11 | 1991 | |
| 5,626,027 Capacity control for multi-stage compressors | 37 | 1994 | |
| 5,907,957 Discharge pressure control system for transport refrigeration unit using suction modulation | 18 | 1997 | |
| 5,996,364 Scroll compressor with unloader valve between economizer and suction | 28 | 1998 | |
| 6,112,534 Refrigeration and heating cycle system and method | 14 | 1998 | |
| 6,044,651 Economy mode for transport refrigeration units | 8 | 1999 | |
| 6,148,628 Electronic expansion valve without pressure sensor reading | 9 | 1999 | |
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| 4,735,055 Method of operating a transport refrigeration system having a six cylinder compressor | 17 | 1987 | |
| 4,903,495 Transport refrigeration system with secondary condenser and maximum operating pressure expansion valve | 29 | 1989 | |
| 5,557,938 Transport refrigeration unit and method of operating same | 28 | 1995 | |
| 5,572,879 Methods of operating a refrigeration unit in predetermined high and low ambient temperatures | 22 | 1995 | |
| 5,598,718 Refrigeration system and method utilizing combined economizer and engine coolant heat exchanger | 19 | 1995 | |
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| 5,187,944 Variable superheat target strategy for controlling an electrically operated refrigerant expansion valve | 11 | 1992 | |
| 5,546,756 Controlling an electrically actuated refrigerant expansion valve | 33 | 1995 | |
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| 5,463,876 Control system for refrigerant metering solenoid valve | 14 | 1994 | |
| 5,661,378 Tractive effort control method and system for recovery from a wheel slip condition in a diesel-electric traction vehicle | 29 | 1995 | |
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| 5,780,998 Multimode power converter | 8 | 1996 | |
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| 5,771,703 Refrigeration control using fluctuating superheat | 20 | 1996 | |
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| 5,131,237 Control arrangement for a refrigeration apparatus | 50 | 1991 | |
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| 4,685,309 Pulse controlled expansion valve for multiple evaporators and method of controlling same | 19 | 1986 | |
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| 5,867,998 Controlling refrigeration | 29 | 1997 | |
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| 5,199,274 Automotive air conditioning apparatus | 11 | 1992 | |
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| 5,182,920 Refrigeration cycle system | 19 | 1992 | |
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| 5,067,556 Controller of refrigerating plant | 34 | 1990 | |
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| 5,625,276 Controller for permanent magnet generator | 67 | 1995 | |
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| 5,798,577 Tractor/trailor cranking management system and method | 41 | 1996 | |
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| 5,715,704 Refrigeration system flow control expansion valve | 32 | 1996 | |
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| 5,628,205 Refrigerators/freezers incorporating solid-vapor sorption reactors capable of high reaction rates | 21 | 1995 | |
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| 4,745,767 System for controlling flow rate of refrigerant | 47 | 1987 | |
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| 5,291,745 Method of improving temperature uniformity of a space conditioned by a refrigeration unit | 19 | 1993 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 20, 2013 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |