[특허]Refrigeration system having periodic flush cycles

[미국특허] Refrigeration system having periodic flush cycles 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25B-041/04 F25B-031/00
출원번호	US-0880288 (1986-06-30)
발명자 / 주소	Alsenz Richard H. (2402 Creekmeadows Missouri City TX 77459)
인용정보	피인용 횟수 : 54 인용 특허 : 3

초록 ▼

A microprocessor controlled system for use in a refrigeration system which includes a plurality of pulse controlled solenoid flow control valves suitable for use as expansion valves is disclosed. A pulse width modulated control signal is generated for cyclically opening and closing the flow through the solenoid expansion valve. The duty cycle of the pulsed control signal determines the average flow rate through the valve. The microprocessor controls, periodically, the opening of each expansion valve to permit full flow therethrough to flush any accumulated compressor lubrication oil logged in any associated evaporator coils.

대표청구항 ▼

A refrigeration system comprising: (a) compressor means having an inlet and an outlet end; (b) a condenser means connected to the outlet end of said compressor means and responsive to a high pressure gaseous phase recirculating refrigerant for condensing the refrigerant from its gaseous to its liquid phase; (c) an evaporator means having an inlet and an outlet end connected to the outlet end of said condenser means and to the inlet end of said compressor means, respectively; (d) said evaporator means having an associated solenoid-actuated expansion valve having an inlet and an outlet end connected between the outlet end of said condenser means, and the inlet end of said evaporator means, said condenser means delivering high pressure liquid refrigerant to the inlet end of said expansion valve, said refrigerant expanding as it flows through said expansion valve; (e) said solenoid-actuated valve including an associated on-off modulator responsive to the instantaneous superheat of said refrigerant in said evaporator means for generating a variable duty cycle on-off modulated solenoid control signal, said solenoid control signal alternatively energizing and de-energizing said associated solenoid-actuated valve for each cycle of said control signal to cycle said valve from a first flow rate position to a second flow rate position without imparting shock waves to the refrigerant thereby to obtain an average flow rate of refrigerant through the valve which results in a desired superheat for the refrigerant in said evaporator means, said valve further including a flush cycle timer means for generating a flush cycle having a time interval during which said associated expansion valve is controlled to permit full flow therethrough to fill said associated evaporator means with liquid refrigerant; and (f) control means for periodically initiating flush cycles for said expansion valve whereby said valve is opened for full flow therethrough during the flush cycle so that said evaporator means is flushed of compressor lubricant oils which may have accumulated therein.

이 특허에 인용된 특허 (3) 인용/피인용 타임라인 분석

Dennis Richard D. (Bridgeport NY) Woollis Theodore L. (Clay NY), Continuous metered flow multizone air conditioning system.
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Hayashi, Masakatsu; Fujie, Kunio, Expansion valve.
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Hargraves David P. (St. Louis County MO), Pulse controlled expansion valve and method.
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이 특허를 인용한 특허 (54) 인용/피인용 타임라인 분석

Kates, Lawrence, Air filter monitoring system.
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Wallis, Frank S.; Knapke, Mitch M.; Bergman, Ernest R., Capacity modulation system for compressor and method.
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Wallis, Frank S.; Knapke, Mitch M.; Bergman, Ernest R., Capacity modulation system for compressor and method.
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Caillat, Jean Luc, Compressor capacity modulation.
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Caillat, Jean-Luc, Compressor capacity modulation.
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Pham, Hung M.; Jayanth, Nagaraj, Compressor data module.
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Pham, Hung M., Compressor diagnostic and protection system and method.
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Pham, Hung M., Compressor diagnostic and protection system and method.
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Pham, Hung M., Compressor diagnostic and protection system and method.
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Pham, Hung M., Compressor diagnostic and protection system and method.
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Pham, Hung M.; Alsaleem, Fadi M., Compressor having a control and diagnostic module.
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Pham, Hung M.; Alsaleem, Fadi M., Compressor having a control and diagnostic module.
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Jayanth, Nagaraj, Compressor protection and diagnostic system.
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Trudeau, Edward J.; Barnett, Kenneth R.; Shelgaonkar, Yogesh; Khairnar, Manoj Pralhad, Compressor protection module.
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Trudeau, Jr., Edward J.; Barnett, Kenneth Ray, Compressor protection module.
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Jayanth, Nagaraj; Renken, Troy W., Compressor sensor module.
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Jayanth, Nagaraj; Renken, Troy W., Compressor sensor module.
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Jayanth, Nagaraj; Renken, Troy W., Compressor sensor module.
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Jayanth, Nagaraj; Renken, Troy W., Compressor sensor module.
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Pham,Hung M; Singh,Abtar; Caillat,Jean Luc; Bass,Mark, Compressor with capacity control.
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Kanazawa Hidetoshi (Fujinomiya JPX) Murashige Yoshinori (Fuji JPX), Control apparatus for multi-air-conditioner system.
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Moon, Joong-Ki; Kim, Young-Man; Moon, Jae-Myoung; Lee, Jung-Min; Kim, Jong-Youb; Cho, Il-Yong, Control system of degree of superheat of air conditioner and control method thereof.
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Pham, Hung M; Singh, Abtar; Caillat, Jean-Luc; Bass, Mark, Cooling system with variable capacity control.
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Thompson Michael B. (Hoffman Estates IL), Flow noise suppression for electronic valves.
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Naruse Nobutaka (Toyoake JPX) Hirano Akihiko (Kariya JPX) Minari Katsunobu (Nagoya JPX), Freezer machine.
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Arensmeier, Jeffrey N.; Hemmelgarn, Gregg M.; Alsaleem, Fadi M.; Abiprojo, Priotomo, HVAC system remote monitoring and diagnosis.
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Arensmeier, Jeffrey N.; Hemmelgarn, Gregg M.; Alsaleem, Fadi M.; Abiprojo, Priotomo, HVAC system remote monitoring and diagnosis.
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Alsaleem, Fadi M.; Hemmelgarn, Gregg M., Heat pump system with refrigerant charge diagnostics.
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Aiyama, Masayuki; Kikuchi, Shouji; Ishibane, Kyuuhei; Ishiki, Yoshikazu; Okamoto, Mitsue, Heat source apparatus and method of starting the apparatus.
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Alsaleem, Fadi M.; Hemmelgarn, Gregg M., Heat-pump system with refrigerant charge diagnostics.
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Scarcella,Jason D.; Lifson,Alexander, Lubricant return schemes for use in refrigerant cycle.
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Kates, Lawrence, Method and apparatus for monitoring a refrigeration-cycle system.
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Kates, Lawrence, Method and apparatus for monitoring a refrigeration-cycle system.
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Kates, Lawrence, Method and apparatus for monitoring a refrigeration-cycle system.
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Kates, Lawrence, Method and apparatus for monitoring a refrigeration-cycle system.
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Kates, Lawrence, Method and apparatus for monitoring a refrigeration-cycle system.
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Kates, Lawrence, Method and apparatus for monitoring a refrigeration-cycle system.
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Kates, Lawrence, Method and apparatus for monitoring refrigeration-cycle systems.
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Kates, Lawrence, Method and apparatus for monitoring refrigeration-cycle systems.
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Hirota,Hisatoshi, Method of operating a refrigeration cycle.
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Kates, Lawrence, Portable method and apparatus for monitoring refrigerant-cycle systems.
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Pham, Hung M., Protection and diagnostic module for a refrigeration system.
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Pham, Hung M., Protection and diagnostic module for a refrigeration system.
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Forsythe David P. (St. Louis MO), Refrigeration control system for cold drink dispenser.
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Pham, Hung M., Refrigeration monitoring system and method.
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Pham, Hung M., Refrigeration monitoring system and method.
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Arensmeier, Jeffrey N., Remote HVAC monitoring and diagnosis.
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Arensmeier, Jeffrey N., Remote HVAC monitoring and diagnosis.
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Arensmeier, Jeffrey N., Residential solutions HVAC monitoring and diagnosis.
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Wood Tony J. (West Salem WI), Solenoid valve with supply voltage variation compensation.
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Wallis, Frank S.; Rozsnaki, Joseph James, System and method for compressor motor protection.
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Wallis, Frank S.; Rozsnaki, Joseph James, System and method for compressor motor protection.
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Wallis, Frank S.; Rozsnaki, Joseph James, System and method for compressor motor protection.
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Wallis, Frank S.; Bergman, Ernest R., Unloader system and method for a compressor.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Refrigeration system having periodic flush cycles 원문보기