System and method of disabling an HVAC compressor based on a high pressure cut out
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04B-049/00
F25B-049/00
출원번호
US-0238966
(2008-09-26)
등록번호
US-8113789
(2012-02-14)
발명자
/ 주소
Douglas, Jonathan D.
Edens, John R.
Garrett, Carl L.
Marble, Alan D.
Mercer, Kevin B.
Sapp, Gary L.
Schaefer, Kristin L.
Schneider, Brett R.
Tice, Steven A.
출원인 / 주소
Trane International Inc.
대리인 / 주소
Conley Rose, P.C.
인용정보
피인용 횟수 :
3인용 특허 :
20
초록▼
A system and method is provided for monitoring a system pressure to infer whether a high pressure cut out (HPCO) switch has opened disabling a heating, ventilating, and air conditioning (HVAC) compressor. A system and method are also provided for determining whether to disable the HVAC compressor ba
A system and method is provided for monitoring a system pressure to infer whether a high pressure cut out (HPCO) switch has opened disabling a heating, ventilating, and air conditioning (HVAC) compressor. A system and method are also provided for determining whether to disable the HVAC compressor based on a status of a low pressure cut out (LPCO) switch, an ambient temperature, and system mode state. The systems and methods may be used interchangeably with the appropriate adjustments to decision limits, such as where the LPCO may be monitored to infer status and the HPCO status may be directly used with temperature and system mode state.
대표청구항▼
1. A system, comprising: a compressor;a heat exchanger;at least one refrigerant line to promote communication of refrigerant between the compressor and the heat exchanger;a high pressure cut out (HPCO) switch to promote disabling the compressor based on a system pressure;a pressure sensor to monitor
1. A system, comprising: a compressor;a heat exchanger;at least one refrigerant line to promote communication of refrigerant between the compressor and the heat exchanger;a high pressure cut out (HPCO) switch to promote disabling the compressor based on a system pressure;a pressure sensor to monitor the system pressure; anda control component configured based on the system pressure monitored by the pressure sensor to infer a status of the HPCO switch. 2. The system of claim 1, wherein when the pressure monitored by the pressure sensor has risen above a first threshold and subsequently drops below a second threshold, the control component configured to infer that the HPCO switch is open and to prevent the compressor from running for a specific short lock out duration. 3. The system of claim 2, wherein the short lock out duration that the compressor is prevented from running is in a range of about 3-6 minutes. 4. The system of claim 2, wherein the first threshold is in of range of about 590-625 psig. 5. The system of claim 2, wherein the second threshold is in a range of about 490-550 psig. 6. The system of claim 2, wherein a time period is also monitored between which the first high and second low pressure thresholds are exceeded and the time period is about one second to two minutes. 7. The system of claim 2, wherein the component is configured to prevent the compressor from running for a hard lock out duration in response to multiple short lock out durations of the compressor. 8. The system of claim 7, wherein the component configured to prevent the compressor from running for a hard lock out duration in response to about 3 to 6 short lock out durations. 9. The system of claim 7 wherein during the hard lock out the compressor is prevented from running until a power cycle occurs, and further wherein the component initiates a service call alert in response to the hard lock out. 10. The system of claim 1, wherein the component uses the monitored system pressure to infer the status of the HPCO switch and one or more of the following: a connection to the HPCO switch to detect a status of the HPCO, which includes electrically detecting whether the HPCO switch is open; andmonitoring the compressor status, which includes whether or not the compressor is receiving power. 11. The system of claim 8, wherein the time required to experience the maximum allowed repeat occurrences of the short lock out durations is within about a 24 hour period. 12. A system to reduce heating, ventilating, and air conditioning (HVAC) compressor wear, comprising: a processor;a control component configured to receive information related to a system pressure monitored by one or more pressure sensors and to use the information to infer whether a high pressure cut out (HPCO) switch has opened. 13. The system of claim 12, wherein when the pressure monitored by the pressure sensor has risen above a first threshold and subsequently drops below a second threshold, the component configured to infer that the HPCO switch is open and to prevent the compressor from running for a short lock out duration. 14. The system of claim 13, wherein the short lock out duration that the compressor is prevented from running is in a range of about 3-6 minutes, wherein the first threshold is in of range of about 590-625 psig, and wherein the second threshold is in a range of about 490-550 psig. 15. The system of claim 13, wherein the component is configured to prevent the compressor from running for a hard lock out duration in response to multiple short lock out durations of the compressor. 16. The system of claim 15, wherein the component configured to prevent the compressor from running for a hard lock out duration in response to about 3 to 6 short lock out durations, and wherein during the hard lock out the compressor is prevented from running until a power cycle occurs. 17. The system of claim 12, wherein the component uses the monitored system pressure to infer the status of the HPCO switch, and one or more of the following: a connection to the HPCO switch to detect a status of the HPCO, which includes electrically detecting whether the HPCO switch is open; andmonitoring the compressor status, which includes whether or not the compressor is receiving power. 18. The system of claim 13, wherein when the pressure monitored by the pressure sensor has risen above a first threshold within a time period and subsequently drops below a second threshold, the component configured to infer that the HPCO switch is open and to prevent the compressor from running for a short lock out duration. 19. The system of claim 16, wherein the component configured to prevent the compressor from running for a hard lock out duration in response to about 3 to 6 short lock out durations within about any 24 hour period, and wherein during the hard lock out the compressor is prevented from running until a power cycle occurs. 20. A method to reduce heating, ventilating, and air conditioning (HVAC) compressor wear, comprising: monitoring a system pressure to infer whether a high pressure cut out (HPCO) switch has opened. 21. The method of claim 20, further comprising: inferring that the HPCO switch is open and preventing the compressor from running for a short lock out duration when the monitored pressure rises above a first threshold and then subsequently drops below a second threshold. 22. The method of claim 21, wherein the short lock out duration that the compressor is prevented from running is in a range of about 3-6 minutes, wherein the first threshold is in of range of about 590-625 psig, and wherein the second threshold is in a range of about 490-550 psig. 23. The method of claim 21, further comprising preventing the compressor from running for a hard lock out duration in response to multiple short lock out durations of the compressor. 24. The method of claim 23, further comprising preventing the compressor from running for a hard lock out duration in response to about 3 to 6 short lock out durations within about any 24 hour period, and wherein during the hard lock out the compressor is prevented from running until a power cycle occurs. 25. The method of claim 20, further comprising monitoring the system pressure to infer the status of the HPCO switch and one or more of the following: a connection to the HPCO switch to detect a status of the HPCO, which includes electrically detecting whether the HPCO switch is open; andmonitoring the compressor status, which includes whether or not the compressor is receiving power. 26. The method of claim 21, further comprising: inferring that the HPCO switch is open and preventing the compressor from running for a short lock out duration when the monitored pressure rises above the first threshold and then within a time period subsequently drops below the second threshold. 27. The method of claim 24, further comprising preventing the compressor from running for the hard lock out duration in response to about 3 to 6 short lock out durations within about any 24 hour period, and wherein during the hard lock out the compressor is prevented from running until a power cycle occurs.
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