US Patent No: 5,177,973
Number of patents in Portfolio can not be more than 2000
Refrigeration system subcooling flow control valve
Stats
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Jan 12, 1993
Issued date -
Mar 19, 1991
filing date -
07/671,364
serial no -
Expired
status
Importance
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Abstract
A flow control valve is disclosed in a household refrigeration appliance having a vapor compression refrigeration system comprising a cyclically operated compressor, a condenser, an evaporator and an expansion device between the condenser and the evaporator. The refrigerant flow control valve is disposed between the condenser and the evaporator and comprises a housing defining a refrigerant flow chamber for receiving liquified refrigerant from the condenser outlet, valve seat structure defining a refrigerant flow port for communicating refrigerant from the condenser to the evaporator, and a flow controlling valve assembly coacting with the valve seat structure to control the refrigerant flow from the refrigerant flow chamber to the expansion device. The flow control valve controls system refrigerant flow in response to subcooling, blocks refrigerant flow from the condenser when the compressor is cycled off and enables circulation of hot gaseous refrigerant under extreme high temperature ambient conditions.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,485,635 Control device for a compressor in a refrigerating system | 21 | 1982 | |
| 4,498,311 Control device for a variable displacement compressor in an air conditioning system | 10 | 1983 | |
| 4,539,821 Capacity control device for controlling a variable displacement compressor in an air conditioning system | 18 | 1984 | |
| 4,633,674 Refrigeration circuit | 9 | 1985 | |
| 4,637,220 Refrigeration system for both vehicle air conditioner and refrigerator | 22 | 1985 | |
| 4,753,083 Device for controlling the capacity of a variable capacity compressor | 30 | 1987 | |
| 4,773,472 Control device for a refrigerating apparatus of a vending machine | 4 | 1987 | |
| 4,779,425 Refrigerating apparatus | 23 | 1987 | |
| 4,780,059 Slant plate type compressor with variable capacity mechanism with improved cooling characteristics | 38 | 1987 | |
| 4,778,348 Slant plate type compressor with variable displacement mechanism | 26 | 1987 | |
| 4,780,060 Slant plate type compressor with variable displacement mechanism | 47 | 1987 | |
| 4,747,753 Slant plate type compressor with variable displacement mechanism | 32 | 1987 | |
| 4,840,038 Control device for use in a refrigeration circuit | 10 | 1987 | |
| 4,788,828 Control device for use in a refrigeration circuit | 12 | 1988 | |
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| 4,459,819 Pulse controlled expansion valve and method | 42 | 1982 | |
| 4,893,782 Metallic seat for fluid valve | 5 | 1988 | |
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| 4,429,552 Refrigerant expansion device | 11 | 1982 | |
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| 4,335,742 Evaporator pressure regulator | 7 | 1977 | |
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| 4,254,634 Control valve to be employed for refrigerator and air conditioner | 6 | 1977 | |
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| 4,267,702 Refrigeration system with refrigerant flow controlling valve | 19 | 1979 | |
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| 4,745,767 System for controlling flow rate of refrigerant | 47 | 1987 | |