[특허]Method for detection of loss of refrigerant

Method for detection of loss of refrigerant 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25B-045/00 F25B-049/00 G01K-013/02
출원번호	US-0376890 (2013-02-04)
등록번호	US-9869499 (2018-01-16)
국제출원번호	PCT/US2013/024575 (2013-02-04)
국제공개번호	WO2013/119489 (2013-08-15)
발명자 / 주소	Liu, Lucy Yi Sun, Jian
출원인 / 주소	CARRIER CORPORATION
대리인 / 주소	Cantor Colburn LLP
인용정보	피인용 횟수 : 0 인용 특허 : 46

초록 ▼

A method is provided for detecting in real-time a refrigerant charge loss in a refrigerant vapor compression system. If both a sensed evaporator outlet superheat exceeds a target evaporator outlet superheat by at least a preset amount of superheat and a sensed degree of openness of an electronic expansion valve exceeds a preset degree of openness for a preset time of period, and a sensed air temperature of either a flow of supply air having traversed the evaporator or a flow of return air returning to the evaporator is changing at a rate less than preset air temperature rate of change, a service alarm is generated indicating a loss of charge warning.

대표청구항 ▼

1. A method for detecting in real-time a refrigerant charge loss in a refrigerant vapor compression system having a refrigerant circuit including a refrigerant compression device, a refrigerant heat rejection heat exchanger, an evaporator and an electronic expansion valve operatively associated with the evaporator, the method comprising: determining at a controller whether both a sensed evaporator outlet superheat exceeds a target evaporator outlet superheat by at least a preset amount of superheat and a sensed degree of openness of the electronic expansion valve exceeds a preset degree of openness for a preset time of period;in response to both the sensed evaporator outlet superheat exceeding the target evaporator outlet superheat by at least the preset amount of superheat and the sensed degree of openness of the electronic expansion valve exceeding the preset degree of openness for the preset time of period, determining at the controller whether at least one air temperature of a sensed supply air temperature of a flow of air having traversed the evaporator or a sensed return air temperature of a flow of air returning to the evaporator is changing at a rate less than a preset air temperature rate of change; andin response to the at least one air temperature of the sensed supply air temperature of a flow of air having traversed the evaporator or the sensed return air temperature of a flow of air returning to the evaporator changing at a rate less than the preset air temperature rate of change, the controller generating a service alarm indicating a loss of charge warning. 2. The method as set forth in claim 1 further comprising: in response to the at least one air temperature of the sensed supply air temperature of a flow of air having traversed the evaporator or the sensed return air temperature of a flow of air returning to the evaporator changing at a rate less than the preset air temperature rate of change, comparing a sensed suction pressure of refrigerant passing to a suction inlet to the compression device to a preset low suction pressure limit, and in response to the sensed suction pressure of refrigerant passing to a suction inlet to the compression device being less than the preset low suction pressure limit for a preset period of time, generating a shut down alarm warning an urgent system refrigerant recharge is required. 3. The method as set forth in claim 1 further comprising: in response to the at least one air temperature of the sensed supply air temperature of a flow of air having traversed the evaporator or the sensed return air temperature of a flow of air returning to the evaporator changing at a rate less than the preset air temperature rate of change,determining whether a sensed speed of the compression device is at a maximum speed limit for the compression device for a predetermined period of time. 4. The method as set forth in claim 3 further comprising: in response to the sensed speed of the compression device being less than the preset maximum speed limit for the speed of the compression device, comparing a sensed suction pressure of refrigerant passing to a suction inlet to the compression device to a preset low suction pressure limit, and in response to the sensed suction pressure of refrigerant passing to a suction inlet to the compression device being less than the preset low suction pressure limit for a preset period of time, generating a service alarm indicating an urgent system refrigerant recharge required warning. 5. The method as set forth in claim 3 further comprising: in response to the sensed speed of the compression device being at the maximum speed limit for the speed of the compression device throughout a preset time interval, comparing a sensed current draw by the compression device to a maximum current draw limit. 6. The method as set forth in claim 5 further comprising: in response to the sensed current draw exceeding a preset percentage of the maximum current draw limit, reducing the speed of the compression device to a lower speed at which the current draw associated with said lower speed is below the preset percentage of the maximum current draw limit. 7. The method as set forth in claim 6 wherein the preset percentage of the maximum current draw limit is at least 90% of the maximum current draw. 8. The method as set forth in claim 5 wherein the preset time interval is at least 3 minutes to 10 minutes. 9. The method as set forth in claim 1, wherein the preset amount is in a range from at least 5° F. (2.8° C.) to 20° F. (11.1° C.), the preset degree of openness is 90%, and the preset time of period is at least 5 minutes. 10. The method as set forth in claim 1 wherein the preset air temperature rate of change is 0.5° F. (0.27° C.) per minute. 11. The method as set forth in claim 2 wherein the refrigerant comprises a carbon dioxide refrigerant and the present low suction pressure limit is a pressure in the range from 120 pounds per square inch absolute (8.3 bars absolute) to 200 pounds per square inch absolute (13.8 bars). 12. The method as set forth in claim 11 wherein the preset low suction pressure limit is about 150 pounds per square inch absolute (10.3 bars).

이 특허에 인용된 특허 (46)

Shah, Rajendra K.; Mills, Eugene L.; Turner, Lynn A., Air conditioning system for low ambient cooling.
상세보기
Beaverson David W. (Bowling Green OH) Clay David A. (Perrysburg OH), Apparatus and method for monitoring refrigeration system.
상세보기
Jeffers Edward (1010 E. 31st St. Hialeah FL 33013) Sacerio Jose L. (1010 E. 31st St. Hialeah FL 33013), Automatic leak detector.
상세보기
Pham, Hung M., Compressor diagnostic and protection system and method.
상세보기
Pham,Hung M; Singh,Abtar; Caillat,Jean Luc; Bass,Mark, Cooling system with variable duty cycle capacity control.
상세보기
Concha,Julio I.; Braun,Robert J.; Gopalnarayanan,Sivakumar; Schuster,Don A.; Das,Sathish R., Detection of refrigerant charge adequacy based on multiple temperature measurements.
상세보기
Duncan Donald (77 Colonial Avenue Scarborough ; Ontario CAX M1M 2C4), Device for detecting loss of refrigerant in an airconditioner.
상세보기
Lifson,Alexander; Taras,Michael F., Diagnosing a loss of refrigerant charge in a refrigerant system.
상세보기
Koizumi Shigeru (Hadano JPX) Zushi Shizuo (Hadano JPX) Komiya Mitsuo (Hadano JPX), Electronic apparatus and method of cooling the same.
상세보기
Diercks Richard Lee Roi (906 25th Ave. Council Bluffs IA 51501) Parrott Robert Lee (305 Elliott St. Council Bluffs IA 51503), Electronic refrigeration and air conditioner monitor and alarm.
상세보기
Krantz Herman F. (728 Benton Ct. Elmhurst IL 60126), Leak detection and refrigerant purging system.
상세보기
Bhatti, Mohinder Singh; Reyzin, Ilya; Enzinna, Donald John, Leak detection apparatus for a liquid circulation cooling system.
상세보기
Munsterhuis,Sybrandus B. V.; Brent,Chian, Leak detection system for a water heater.
상세보기
Vandamme Detlef (Berlin DT), Leak indicating apparatus for a closed cooling system of an electric machine.
상세보기
Hoog Hollis Ellsworth ; Hoog Darrell Arron, Liquid leak detector.
상세보기
Blair John H. (Westland MI) Dolinski Norman H. (Grosse Pointe Woods MI) Dage Gerhard A. (Franklin MI) Peck George E. (Dearborn MI) Koberstein Manfred (Warren MI) Matteson Robert W. (Ann Arbor MI), Low refrigerant charge detection system.
상세보기
Runk Robert M. (Gasport NY), Low refrigerant charge detection system for a heat pump.
상세보기
Bessler Warren F. (Schenectady NY), Low refrigerant charge detection using thermal expansion valve stroke measurement.
상세보기
Roy M. Yabuki ; Derek Y. Kamemoto ; Virender Jain ; Richard L. Kenyon, Method and apparatus for detecting low refrigerant charge.
상세보기
Kang,Pengju; Farzad,Mohsen; Finn,Alan M.; Sadegh,Payman, Method and control for determining low refrigerant charge.
상세보기
Porter Kevin J. ; Malone Garret J., Method for automated detection of leaks in a discharge check valve.
상세보기
Joseph A Gale ; Kwangtaek Hong, Method for detecting low-charge condition in air conditioning system and device incorporating same.
상세보기
Minor, Barbara Haviland, Method for leak detection in heat transfer systems.
상세보기
Herbert Wieszt DE; Wolfgang Straub DE, Method for monitoring the refrigerant filling level in refrigerating system.
상세보기
Dobmeier,Thomas J.; Taras,Michael F.; Lifson,Alexander, Monitoring refrigerant charge.
상세보기
Mei, Viung C.; Chen, Fang C.; Kweller, Esher, Non-intrusive refrigerant charge indicator.
상세보기
Singh, Abtar; Woodworth, Stephen T.; Churiwal, Pawan K., Proofing a refrigeration system operating state.
상세보기
Weber Robert C. (57 Dunbar Rd. Palm Beach Gardens FL 33418), Refrigerant alert and automatic recharging device.
상세보기
Dorfman Donald (Royal Palm Beach FL) Poma Frank (Delray Beach FL), Refrigerant and H.V.A.C. ducting leak detector.
상세보기
Braun, II, Robert J.; Kang, Pengju; Concha, Julio I.; Gopalnarayanan, Sivakumar; Galante, Timothy P.; Luo, Dong; Kersten, Craig, Refrigerant charge adequacy gauge.
상세보기
Webber Robert C. (908 Holoma Dr. Vero Beach FL 32963), Refrigerant expansion device.
상세보기
Martell Dennis (Naperville IL) Krcma Jan (Elk Grove Village IL), Refrigerant gas leak detector.
상세보기
Rinehart, Charlie M., Refrigerant leak detection system.
상세보기
Morrow Gordon R. (South Houston TX), Refrigerant leak detector system.
상세보기
Tachigori Riko,JPX ; Fujitaka Akira,JPX ; Watanabe Yukio,JPX ; Kobayashi Yoshinori,JPX ; Haneda Kanji,JPX, Refrigerant leakage warning device for apparatus having refrigeration cycle using flammable refrigerant.
상세보기
Ryan David J. (P.O. Box 265 Chelan WA 98816), Refrigerant loss detector and alarm.
상세보기
Winslow James G. (Detroit MI), Refrigerant loss monitor.
상세보기
Johnson,Daniel T.; Peterson,James W.; McConnell,Robert S., Refrigerant loss tracking and repair.
상세보기
Esslinger,Steve L., Refrigerant tracking/leak detection system and method.
상세보기
Okamoto Hiroshi (Fuji JPX) Fushimi Kimio (Shimizu JPX) Suzuki Susumu (Numazu JPX), Refrigerating apparatus and control method thereof.
상세보기
Nobuta Tetsuji,JPX ; Sakakibara Hisayoshi,JPX, Refrigeration cycle device having accurate refrigerant deficiency detection capability.
상세보기
Singh, Abtar; Matthews, Thomas J.; Woodworth, Stephen T., System and method for monitoring a compressor of a refrigeration system.
상세보기
Singh,Abtar; Mathews,Thomas J; Woodworth,Stephen T, System and method for monitoring a condenser of a refrigeration system.
상세보기
Duff Paul J. (Lebanon CT) Larson John P. (Burlington CT) Lechtanski Joseph B. (Castle Rock CO), System for monitoring condenser pressure.
상세보기
Tulpule Sharayu, System monitoring refrigeration charge.
상세보기
Proctor Robert H. (Baltimore MD) Hobbs ; Jr. Arthur G. (Hampstead MD), Weight-monitored air-conditioner charging station.
상세보기

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

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

Method for detection of loss of refrigerant 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허에 인용된 특허 (46)

관련 콘텐츠

특허 원문 보기

IPC 상위 출원인

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트

연합인증

Method for detection of loss of refrigerant 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

전체(0) 논문(0) 특허(0) 보고서(0)

전체(0) 논문(0) 특허(0) 보고서(0)

이 특허에 인용된 특허 (46)

관련 콘텐츠

특허 원문 보기

IPC 상위 출원인

AI-Helper ※ AI-Helper는 오픈소스 모델을 사용합니다.

선택된 텍스트