IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0306030
(2002-11-27)
|
발명자
/ 주소 |
- Pham, Hung M.
- Singh, Abtar
- Caillat, Jean-Luc M.
- Bass, Mark
|
출원인 / 주소 |
|
대리인 / 주소 |
Harness, Dickey & Pierce, P.L.C.
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인용정보 |
피인용 횟수 :
71 인용 특허 :
44 |
초록
▼
A diagnostic system and method for a cooling system includes producing a control signal for adjusting a valve position of a regulator valve as a demand for cooling, as well as providing an ambient temperature measurement, coil inlet temperature measurement, and coil exit temperature measurement. The
A diagnostic system and method for a cooling system includes producing a control signal for adjusting a valve position of a regulator valve as a demand for cooling, as well as providing an ambient temperature measurement, coil inlet temperature measurement, and coil exit temperature measurement. The valve position and at least one of the ambient temperature measurement, coil inlet temperature measurement, and coil exit temperature measurement are monitored and compared with at least one predetermined fault value indicative of a fault condition to diagnose the system. An alert module responsive to the diagnostic module issues an alert signal when at least one of the ambient temperature measurement, coil inlet temperature measurement, and coil exit temperature measurement bears a predetermined relationship to the fault value. When monitoring and comparing, an error value percentage indicative of a percentage of sampled error within an accepted offset range for a defined period of time is determined.
대표청구항
▼
A diagnostic system and method for a cooling system includes producing a control signal for adjusting a valve position of a regulator valve as a demand for cooling, as well as providing an ambient temperature measurement, coil inlet temperature measurement, and coil exit temperature measurement. The
A diagnostic system and method for a cooling system includes producing a control signal for adjusting a valve position of a regulator valve as a demand for cooling, as well as providing an ambient temperature measurement, coil inlet temperature measurement, and coil exit temperature measurement. The valve position and at least one of the ambient temperature measurement, coil inlet temperature measurement, and coil exit temperature measurement are monitored and compared with at least one predetermined fault value indicative of a fault condition to diagnose the system. An alert module responsive to the diagnostic module issues an alert signal when at least one of the ambient temperature measurement, coil inlet temperature measurement, and coil exit temperature measurement bears a predetermined relationship to the fault value. When monitoring and comparing, an error value percentage indicative of a percentage of sampled error within an accepted offset range for a defined period of time is determined. stand upon a ground surface, and also including an elongate tubular member having a plurality of holes being spacedly disposed alone and through a wall of said elongate tubular member and being adjustably and fastenably mounted with a fastener upon and extendable from said elongate base member; and a trimmer guide assembly being mounted to said support assembly and including upper guide members being adapted to extend over a plant, and also including lower guide members being adapted to extend about a bottom portion of the plant, said trimmer guide assembly further including a plurality of bracket members being mounted upon top ends of said elongate tubular members, said upper guide members being semi-circular ring members having ends which are securely attached to said bracket members, said semi-circular ring members crisscross one another at intermediate portions thereof. 2. A plant trimming guide apparatus as described in claim 1, wherein each of said semi-circular rings is attached to said telescoping leg members which are diametrically opposed to one another. 3. A plant trimming guide apparatus as described in claim 1, wherein each of said semi-circular rings has slots being disposed in said ends thereof. 4. A plant trimming guide apparatus as described in claim 3, wherein said lower guide members are arcuate arm members each having a node being disposed from an end thereof and being removably and securely received in a respective said slot of a respective said semi-circular ring, said arcuate arm members being adapted to be curved inwardly of the plant and being suspended from said semi-circular ring members. (23,23') together with the housing (11) define a third cylinder space (26,26'), which can be connected to the compressed air inlet (16,16') or the outlet (17,17'), the third cylinder space (26,26') being located on one side of the main piston (22,22') and the second cylinder space (27,27') located on the other side of the main piston (22,22'), viewed in the main piston's (22) axial direction, and there is provided a first passage (29,29') which connects the second cylinder space (27,27') with the low-pressure fluid inlet (14,14') and in this passage (29) there is provided a check valve (30,30'), which can be influenced by a body (28,28'), which, when no low-pressure fluid impulse exists in the low-pressure fluid inlet (14,14'), influences the check valve (30,30') in such a manner that it is located in a first position, wherein a fluid flow is permitted in both directions through the first passage (29), and which when such an impulse exists, brings the check valve (30) into a second position, wherein it permits a flow only from the low-pressure fluid inlet (14,14') to the second cylinder space (27), and in the housing there is provided a shut-off valve (48,52;48',52') which in a first position prevents a connection between the third cylinder space (26,26') and the compressed air inlet (16,16') and provides a connection between the third cylinder space (26,26') and the compressed air outlet (17,17'), and in a second position provides a connection between the third cylinder space (26,26') and the compressed air inlet (16,16'), preventing a connection between the third cylinder space (26,26') and the compressed air outlet (17,17'), characterized in that the body is in the form of a valve piston (28,28'), which is sealingly and slidably mounted in the housing (11,11'), and which has a first end portion (34,34') which is arranged to influence the check valve (30,30'), and a second end portion (55,55') which is arranged to influence the shut-off valve (48,52;48',52'), whereby the valve piston (28,28') is arranged to be moved in a first direction, bringing both valves (30,30' and 48,52;48',52'respectively) to their second positions when a pressure impulse occurs in the low-pressure fluid inlet (14,14') and to be moved in the opposite direction, bringing both valves (30,30' and 48,52;48',52' respectively) to their first positions when no pressure impulse occurs in the low-pressure fluid inlet (14,14'). 2. A booster according to claim 1, characterized in that the shut-off valve comprises a valve body (48,48') which is axially movable in the housing and which is arranged to abut against a valve seat (52,52') of the housing (11,11'), thereby preventing a communication between the compressed air inlet (16,16') and the third cylinder space (26,26'), and the valve piston's (28,28') second end portion (55,55') is arranged to come into abutment against the valve body (48,48') and move it away from the seat (52,52'), thereby providing such a communication when the valve piston (28,28') is moved in the first direction. 3. A booster according to claim 2, characterized in that the shut-off valve is a plate valve, where the valve body (48) comprises a valve plate (50) which is supported by a stem (49) with a through-going, second passage (56) via which the third cylinder space (26) can communicate with the compressed air outlet (17), the valve piston's (28) second end portion (55) being arranged to close the second passage (56) while at the same time the valve piston (28) brings the valve body (48) away from its seat (52). 4. A booster according to claim 3, characterized in that the valve piston (28) is mounted in and extends coaxially with the main piston (22). 5. A booster according to claim 2, characterized in that in the valve piston (28') there is provided an axial passage (56') which extends from the end of the valve piston which is arranged to abut against the valve body (48') and leads into an annulus (78) which is bo
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