[특허]Refrigerant charge indication

Refrigerant charge indication 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25B-045/00 F25B-049/00
출원번호	US-0519652 (2006-12-20)
등록번호	US-9568226 (2017-02-14)
국제출원번호	PCT/US2006/048573 (2006-12-20)
§371/§102 date	20091209 (20091209)
국제공개번호	WO2008/079108 (2008-07-03)
발명자 / 주소	Schuster, Don A. Das, Sathish R.
출원인 / 주소	CARRIER CORPORATION
대리인 / 주소	Cantor Colburn LLP
인용정보	피인용 횟수 : 0 인용 특허 : 93

초록 ▼

A method and apparatus are provided for indicating the status of the refrigerant charge in an air conditioning system based upon the degree of subcooling present in the condensed refrigerant system temperature measurements. The status of the refrigerant charge in the system is indicated in real-time on a service panel for access by a field service technician. The status of the refrigerant charge in the system on a time-average basis for a specified period of operation is presented on an indicator panel. The indicator panel includes a first indicator light indicating that the refrigerant charge is low, a second indicator light indicating that the refrigerant charge is high, and a third indicator light indicating that the refrigerant charge is correct.

대표청구항 ▼

1. A method for indicating a level of refrigerant charge in a refrigerant vapor compression system having a compressor, a condenser coil, an expansion device and an evaporator coil connected in serial relationship in refrigerant flow circuit, comprising: sensing a pressure of the refrigerant leaving the condenser coil and generating a first signal indicative of a sensed refrigerant pressure;sensing a temperature of the refrigerant downstream of the condenser coil and upstream of the expansion device and generating a second signal indicative of a sensed refrigerant temperature;calculating in real-time a real-time value for the degrees of subcooling present based upon the sensed refrigerant pressure and the sensed refrigerant temperature;outputting an electrical signal indicative of the real-time value for the degrees of subcooling present;calculating an average value for the degrees of subcooling over a preselected time period of system operation; andoutputting an indication of a refrigerant charge status over the preselected time period of system operation based on a step consisting of comparing the average value for the degrees of subcooling over the preselected time period to a threshold;wherein said outputting the electrical signal indicative of the real-time value for the degrees of subcooling present comprises outputting a milli-volt electrical signal indicative of the real-time value for the degrees of subcooling present. 2. The method as set forth in claim 1 wherein outputting the indication of refrigerant charge status over the preselected time period of system operation comprises outputting an indication of whether the refrigerant charge status is low, high or correct. 3. The method as set forth in claim 1 wherein outputting the indication of refrigerant charge status over the preselected time period of system operation comprises: providing an acceptable range for said average value for the degrees of subcooling over the preselected time period of system operation, said acceptable range extending from a lower threshold level to an upper threshold level;comparing said average value for the degrees of subcooling over the preselected time period of system operation to said acceptable range for the degrees of subcooling over the preselected time period of system operation; andproviding a refrigeration charge status indication reflecting one of: a low refrigerant charge if said average value for the degrees of subcooling over the preselected time period of system operation is below said lower threshold value, a high refrigerant charge if said average value for the degrees of subcooling over the preselected time period of system operation is above said upper threshold value, and a correct refrigerant charge if said average value for the degrees of subcooling over the preselected time period of system operation lies within said acceptable range. 4. The method as set forth in claim 3 wherein providing the refrigeration charge status indication reflecting one of the low refrigerant charge, the high refrigerant charge or the correct refrigerant charge comprises: illuminating a first light indicating a low refrigerant charge if said average value for the degrees of subcooling over the preselected time period of system operation is below said lower threshold value,illuminating a second light indicating a high refrigerant charge if said average value for the degrees of subcooling over the preselected time period of system operation is above said upper threshold value, andilluminating a third light indicating a correct refrigerant charge if said average value for the degrees of subcooling over the preselected time period of system operation lies within said acceptable range. 5. Apparatus for indicating the level of refrigerant charge in a refrigerant vapor compression system having a compressor, a condenser coil, an expansion device and an evaporator coil connected in serial relationship in refrigerant flow circuit, comprising: a pressure sensor for sensing the pressure of the refrigerant leaving the condenser coil and generating a first signal indicative of the sensed refrigerant pressure;a temperature sensor for sensing the temperature of the refrigerant downstream of the condenser coil and upstream of the expansion device and generating a second signal indicative of the sensed refrigerant temperature;a processor for calculating in real-time a value for the degrees of subcooling present based upon the sensed refrigerant pressure and the sensed refrigerant temperature and outputting an electrical signal indicative of the real-time value for the degrees of subcooling present and for calculating an average value for the degrees of subcooling over a preselected time period of system operation and outputting an indication of a refrigerant charge status based on a step consisting of comparing of the average value for the degrees of subcooling over the preselected time period of system operation to a threshold;wherein said outputting the electrical signal indicative of the real-time value for the degrees of subcooling present comprises outputting a milli-volt electrical signal indicative of the real-time value for the degrees of subcooling present. 6. The apparatus as recited in claim 5 further comprising a service panel for receiving the electrical signal indicative of the real-time value for the degrees of subcooling present from said processor, said service panel having a tap at which the electrical signal indicative of the real-time value for the degrees of subcooling present is presented. 7. The apparatus as recited in claim 5 further comprising an indicator panel for receiving a signal indicative of the refrigerant charge status over the preselected time period of system operation; said indicator panel having a first indicator associated with a low refrigerant charge, a second indicator operatively associated with a high refrigerant charge, and a third indicator operatively associated with a correct refrigerant charge. 8. The apparatus as recited in claim 7 wherein: said first indicator comprises a first light adapted to be illuminate for indicating a low refrigerant charge:said second indicator comprises a second light adapted to be illuminated for indicating a high refrigerant charge; andsaid third indicator comprises a third light adapted to be illuminated for indicating a correct refrigerant charge. 9. Apparatus for indicating the level of refrigerant charge in an air conditioning system having a compressor, a condenser coil, an expansion device and an evaporator coil connected in serial relationship in refrigerant flow circuit, comprising: a pressure sensor for sensing the pressure of the refrigerant leaving the condenser coil and generating a first analog signal indicative of the sensed refrigerant pressure;a first analog-to-digital converter operatively associated with said pressure sensor for converting said first analog signal into a first digital signal;a temperature sensor for sensing the temperature of the refrigerant downstream of the condenser coil and upstream of the expansion device and generating a second analog signal indicative of the sensed refrigerant temperature;a second analog-to-digital converter operatively associated with said temperature sensor for converting said second analog signal into a second digital signal;a microprocessor for receiving said first and second digital signals and calculating in real-time a value for the degrees of subcooling present based upon the sensed refrigerant pressure and the sensed refrigerant temperature and outputting an digital signal indicative of the real-time value for the degrees of subcooling present and for calculating an average value for the degrees of subcooling over a preselected time period of system operation and outputting an indication of a refrigerant charge status based on a step consisting of comparing the average value for the degrees of subcooling over the preselected time period of system operation to a threshold;a digital-to-analog converter for converting the digital signal indicative of the real-time value for the degrees of subcooling present to a milli-volt electrical signal;a service panel for receiving the milli-volt electrical signal indicative of the real-time value for the degrees of subcooling present from said processor, said service panel having a tap at which the milli-volt electrical signal indicative of the real-time value for the degrees of subcooling present is presented; andan indicator panel for receiving a signal from said microprocessor indicative of the refrigerant charge status over the preselected time period of system operation, said indicator panel having a first light adapted to be illuminate for indicating a low refrigerant charge, a second light adapted to be illuminated for indicating a high refrigerant charge, and a third light adapted to be illuminated for indicating a correct refrigerant charge.

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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

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
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Refrigerant charge indication 원문보기

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