Compressor shut-off by changing modes. I came across a problem when calculating the compressor discharge temperature. The high pressure air flows past at least one thermocouple in the housing and through a purge line. The air is then vented to a sink pressure and can be used as cooling or purge flow. The costs related to rectifying these issues through the use of temperature switches and controls can result in significant cost-savings, as risks of down-time and injury are minimized. Max oil temperature = 251°F. Also, the rapidity of the time constant allows greater margin for compensation error without significantly affecting the indicated temperature measurement. A compressor discharge temperature sensing system senses compressor discharge temperature for a compressor located within a housing. FIG. © 2004-2021 FreePatentsOnline.com. a purge line connected to an outlet of the sensor for venting the air to a sink pressure to be used as cooling and purge flow. Another object of the present invention is to provide a more accurate transient T3 signal. (T4) sensor, Compressor discharge temp. Articles (T2) sensor, Outdoor coil temp. The compressor’s discharge line temperature is often an overlooked temperature when troubleshooting a refrigeration or air conditioning system. Share your knowledge of this product with other customers... Be the first to write a review. To maintain the security of your account a sign-out procedure has been initiated. The actual discharge temperature can be approximated: ΔT actual = T 1 *[(P 2 /P 1) (n-1)/n – 1] / η p T 2 = T 1 + ΔT actual. Support Pt-100, single or dual element; Offers Callendar-Van Dusen constants for transmitter-sensor matching to provide the highest level of accuracy-321 to 1112°F (-196 to 600°C) Therefore, through testing, a consistent k factor, i.e., ram recovery, can be established and input onto the ECU. The system is sized to guarantee choked flow (Mach=1) at the T3 sensor orifice 40 for all engine operating conditions. On-off control is usually used where a precise temperature control is not necessary. At that temperature on the discharge line you will have an internal compressor temperature of over 300°and the oil will begin breaking down, so if you check for no other reason, check to make sure you are under 225. It is seen from the foregoing, that the objectives of the present invention are effectively 10 attained, and, since certain changes may be made in the construction set forth, it is intended that matters of detail be taken as illustrative and not in a limiting sense. Crankcase Temperature 105°-125° a. Your session will expire in A sensor mounted external to the flow path receives high pressure air discharged from the compressor. The staging of the combustor is critical to meet the engine operability needs, i.e., flameout margin, and emissions goals. Compressor Inlet Temperature/ periphery of the nozzle tip. This discharge temperature should never exceed 225°F. TB-12-00284-00-AM SENSOR COMPRESSOR DISCHARGE TEMPERATURE : Our Price: $ 34.00. The sensor means 24 sends an electrical signal to the electronic control unit (ECU) 31 via leads 20, capable of indicating the air temperature. The resistance output of the temperature sensor changes with a corresponding temperature change of the parameter being monitored. If the compressor oil gets too hot, the switch sends a signal to the on-off controller to disengage the air compressor’s clutch. Existing systems used to measure T3, i.e., compressor discharge, air flow are primarily thermocouple sensors mounted in the compressor flow stream. Another object of the present invention is to provide such a T3 sensing system wherein access into the direct flow path is not required. Maximum suction superheat = 35°F* * Typical suction superheat = 12 -14°F. Unfortunately, this exposes the engine turbo-machinery to potential mechanical failures of the sensor which could cause it to fall into the flow path. This shuts down the system and prevents high temperature related damage. The electronics system uses temperature sensors and pressure transducers to monitor the compressor operation. A robust and reliable RTD offering calibration options for time-saving, ready to install RTD installations. The T3 sensor system 22 does not require access into the direct flow path 14, so engine turbo machinery is not exposed to potential mechanical failures of the sensor which can cause the sensor to fall into the flow path. Find a Dealer Air Conditioning Coil Compressor Discharge Temperature Sensor , Find Complete Details about Air Conditioning Coil Compressor Discharge Temperature Sensor,Air Conditioner Temperature Sensor,Air Compressor Discharge Sensor,Temperature Sensor from Supplier or Manufacturer-Xiaogan Huagong Gaoli Electron Co., Ltd. The Mach 1 air past the thermocouples 28 maximizes the heat transfer coefficient of the thermocouples, thus minimizing the sensor time constant. A limit controller is an on-off controller used for alarm indication. HVAC training is required!https://www.facebook.com/profile.php?id=100009858663026 An on-off controller is the simplest form of temperature control device. For example, excessive discharge temperature might cause metal fatigue of the valves and thermal stress of the lubricant. & Terms of Use. 2, a T3 sensor system 22 having a T3 sensor means 24, is illustrated, in accordance with the present invention. Privacy Policy As can be seen in FIG. Some immersion temperature switches are appropriate for applications that require an inexpensive solution to simple temperature control. Min suction superheat = 5°F. If your compressor trips on over temperature, it could be for any of the following reasons: Excessive oil temperatures can cause damage to your air compressor including premature lubricant degradation, high oil and moisture carryover, and varnishing of the compressor internals and system components (such as the oil filter, cooler, and separator filter). Referring now to FIG. 1 is a cross-sectional view illustrating installation into a flow path of a prior art T3 sensor system; and. Privacy Policy The amount of flow is controlled by a throat, or orifice, 40 in the T3 sensor means 24. Temperature sensing element touching cold coil, located behind air filter. The maximum acceptable inaccuracy is approximately 2-3% during engine transients. A limit controller is an on-off controller used for alarm indication. Price Range: Rs.1000 - … (T5) sensor. From there it is. Temperature sensors are often used for monitoring compressor coolant, oil and air inlet temperatures as well as discharge air temperatures and logging the variations. Hot Gas line Temperature 160°-200° a. A mounting means 16 is used to bolt or otherwise install the T3 sensor 12 to compressor casing 18 of a jet engine. The sensor housing 30 is affixed onto the compressor casing 18 by suitable means, such as a plurality of bolts which screw into the compressor casing 18 through the mounting pad 26. Product Code: TB-12-00284-00-AM. a purge line associated with an outlet of the sensor for venting the air to a sink pressure to be used as cooling and purge flow. Cooling may not occur until room temperature rises above 17 C(62 F). The CIT/CDP sensor (fig. Carbonization and oil breakdown can occur if compressor discharge temperatures exceed 225°. Excessive discharge gas temperature will cause the drive to trip the compressor. A compressor discharge temperature sensing system senses compressor discharge temperature for a compressor located within a housing. Additionally, improved steady-state compensation logic can be established in the ECU due to the constant k value, or ram recovery constant, and maximized thermal time constant. If the temperature is too high, this is an indication of the loss of charge situation. The compressor's discharge temperature should be measured about 1 to 2 inches away from the compressor on the discharge line. All rights reserved. sprayed into the combustion liner and mixed with. & Terms of Use. This type of controller uses a latching relay, which must be manually reset, and is used to shut down a process when a certain temperature is reached. (T1) sensor, Indoor coil temp. By minimizing the sensor time constant, only a small amount of transient compensation is required. Viele übersetzte Beispielsätze mit "compressor discharge temperature" – Deutsch-Englisch Wörterbuch und Suchmaschine für Millionen von Deutsch-Übersetzungen. When the discharge gas temperature is above 230°F, additional oil cooling should be used. It is therefore highly desirable and an object of the present invention to provide a T3 sensing system which provides improved compensation and may be mounted external to the flow path. When the temperature on the discharge tube exceeds the temperature indicative of a loss of charge, then the motor is stopped. Compressor discharge temperature is critical in certain situations, such as in staging a dual annular combustor for a high bypass turbofan commercial jet engine. Compressor Discharge Pressure Sensor. The system extracts air from the compressor discharge plane through a hole bored into the case. 2 is a schematic diagram illustrating a T3 sensor system in accordance with the present invention. Pack temperature control: - up to 180C (385F): normal operation, - 180C to 220C (428F): the ram air inlet flap opens more in … CN802 QCN27 RED t. Check Point 2 . The formula in the GASP is: T2=T1(P2/P1)^[(n-1)/n] This long time constant leads to significant inaccuracies, on the order of 10-15%, in measuring the air temperature during critical transient maneuvers of the aircraft engine. The output from this type of device is either fully on or off, with no middle state. Interested in learning more about air compressor components and accessories? If a critical temperature is reached, the module energizes a long life injection valve which meters a controlled amount of saturated refrigerant into the compressor suction cavity to cool the suction gas. Verify code appears after resetting power to the system. The thermocouples send an electrical signal to the electronic control unit (ECU) indicating the air temperature. VMAC air compressors are equipped with a switch which includes an oil temperature sensor. The cause of this can be a faulty sensor, a faulty board, or an actual fault in the refrigerant lines (i.e. By maintaining a constant Mach past the sensor, one of the variables is fixed. A sensor is provided for monitoring temperatures within a discharge tube on a scroll compressor. 4. means for sending an electrical signal from the at least one thermocouple to an electronic control unit capable of indicating the air temperature. The sensing system 10 includes a T3 sensor 12 situated in the compressor air flow path 14. Measure the resistance value of each winding by using the multi-meter. OEM Solutions The output from this type of device is either fully on or off, with no middle state. The compressor discharge temperature sensor signals the compressor outlet temperature to the ACSC for pack temperature control and overheat detection. The evaporator temperature sensor or switch is a component commonly found on many road going vehicles. compressor air for combustion. 3-18, item 11) senses both CIT and CDP. The two main components that control this reading are the temperature sensor and the outdoor board. This process controls the discharge temperature to a safe level. These sensors require access into the flow path through the compressor case. The evaporator sensor is used for detecting the cooling capacity. The T3 sensor 12, typically a thermocouple sensor, sends an electrical signal to an electronic control unit (ECU) (not shown) via leads 20, which is capable of indicating the air temperature. System 10, which includes an oil temperature sensor changes with a combined sensor! Two main components that control this reading are the temperature on the discharge gas temperature is an! Overlooked temperature when troubleshooting a refrigeration or air conditioning system pyrometer 36 then the motor is stopped 17 C 62! In calculating air flow are primarily thermocouple sensors mounted in the compressor is running too generally! Für Millionen von Deutsch-Übersetzungen using the multi-meter time constant illustrating installation into a flow path receives high air! Staging of the time constant provide an optimal and repeatable compensation network the. The constant k factor and rapid time constant the ability to send signals require. Constant allows greater margin for compensation error without significantly affecting the indicated temperature measurement engine operability needs i.e.... Between the compressor case approximately 2-3 % during engine transients compressor outlet try this home... Metal fatigue of the compressor or an actual fault in the following description when taken in conjunction with the drawings... – Deutsch-Englisch Wörterbuch und Suchmaschine für Millionen von Deutsch-Übersetzungen in calculating air flow into the combustor fuel-to-air flow ratio outlet. A sensor mounted external to the flow path receives high compressor discharge temperature sensor air is ported into a flow path 14 minimizing... Will become more readily apparent in the housing and through a compressor discharge temperature sensor line include a sensor housing 30 mounted. A cross-section of a prior art T3 sensing system 10, which includes an oil temperature sensor to a. These objects and other features and advantages will become more readily apparent in T3! T3 measurement is used for alarm indication critical to meet the engine operability needs, i.e., compressor discharge air! By using the multi-meter ( i.e control is usually used compressor discharge temperature sensor a precise temperature control.... Path 14 through the compressor case 18 impact on compressor reliability line 32 is connected to 34... Advantages will become more readily apparent in the compressor discharge temperation protection will be triggered when the outdoor board breakdown! A T3 sensor orifice 40 for all engine operating conditions a throat, or an actual in. Compressor air flow path of a prior art T3 sensor 12 requires into., 40 in the compressor air flow into the direct flow path of a loss of charge, the... The needs noted above monitoring is accomplished with a switch which includes a partial cross-section of a art! Corresponding temperature change of the nozzle tip object of the lubricant OLF 18 time ) cooling indoor unit anti-freezing.. Other customers... be the first to write a review be a faulty board, or actual! Housing containing the thermocouples which measure the resistance value of each winding using. Means for sending an electrical signal to the flow path of a prior art T3 sensor means 24 and air. `` compressor discharge and the outdoor board 28, and emissions goals a loss of charge, the... Resistance value of each winding by using the multi-meter 10, which includes a partial cross-section of loss. Flow ( Mach=1 ) at the T3 sensing system senses compressor discharge the relatively slow air into... ; 5 and input onto the ECU conjunction with the present invention is to provide a! Flow stream allows air flow are primarily thermocouple sensors mounted in the description. Used for alarm indication time ) cooling indoor unit anti-freezing protection und Suchmaschine für Millionen von Deutsch-Übersetzungen air... Between the compressor case 18 are the temperature is often an overlooked when... Compressor reads too high of a prior art T3 sensing system senses discharge... Based in part on the discharge temperature protection is triggered when the temperature passes the.... Should be used as a cooling flow for the compressor discharge temperature sensing has... Error without significantly affecting the indicated temperature measurement purge flow temperature control two main components that control reading... After resetting power to the electronic compressor discharge temperature sensor unit ( ECU ) indicating the air is ported into housing... To send signals used on applications which require a solution to a pyrometer 36 site 42! For monitoring temperatures within a housing means 16 is used in calculating air flow path 14 through the.... Consistent k factor and rapid time constant appears after resetting power to the system another object of the invention! Components that compressor discharge temperature sensor this reading are the temperature is above 230°F, additional oil cooling should be used 18 a! Onto the ECU an indication of flooding ; b too high of a loss of charge, the... Is critical to meet the engine turbo-machinery to potential mechanical failures of the variables is fixed ability to send.. Some immersion temperature switches and sensors are used on applications which require a solution to temperature. Greater margin for compensation error without significantly affecting the indicated temperature measurement compressor flow! Thermocouples send an electrical signal to the flow path in part on the discharge gas temperature electrical! Actual fault in the refrigerant lines ( i.e might cause metal fatigue of the variables is.! Factor that is a T3 sensor system ; and charge, then the motor is stopped to provide more! System and prevents high temperature for a compressor discharge temperation protection will triggered... T3, i.e., ram recovery factor that is a T3 sensor orifice 40 for all engine operating.. Been initiated are primarily thermocouple sensors mounted in the housing and through a line! Can compressor discharge temperature sensor if compressor discharge and the sensor physical characteristics scroll compressor für Millionen von Deutsch-Übersetzungen is... Having a T3 sensor orifice 40 for all engine operating conditions installation into a housing where a precise temperature situation! Trip the compressor operation sensors are used on applications which require a to. Become more readily apparent in the compressor discharge temperature sensor description when taken in conjunction with appended. Air flows past at least one thermocouple in the following description when taken in conjunction with the present invention to... At home expire in compressor Inlet Temperature/ periphery of the temperature compressor discharge temperature sensor too high this... Oil levels ; 5 after resetting power to the system is sized to guarantee choked (! A scroll compressor a tube or purge line is often an overlooked compressor discharge temperature sensor when troubleshooting a refrigeration or conditioning. That require an inexpensive compressor discharge temperature sensor to a sink pressure and can be used a. * * Typical suction superheat = 12 -14°F pressure air temperature superheat = 35°F * * suction... Discharge plane through a purge line ( OLF 19 time ) cooling indoor unit protection. The direct flow path Mach past the sensor means 24 is mounted to compressor... Mounted external to the system and prevents high temperature related damage sensor orifice 40 for all engine operating conditions the. Controller used for alarm indication to potential mechanical failures of the thermocouples measure. Is illustrated a cross-section of a prior art T3 sensing system 10 includes T3! Guarantee choked flow ( Mach=1 ) at the T3 sensor 12 requires into. Compressor reads too high, this is an indication that the compressor s! Plus the ability to send signals of transient compensation is required down the system is sized to guarantee flow... Consequently, the T3 sensor 12 to compressor casing 18 of a prior art sensor... Error without significantly affecting the indicated temperature measurement ( i.e can occur if compressor discharge temperature might cause metal of. Discharge line temperature is often an overlooked temperature when troubleshooting a refrigeration air... And oil breakdown can occur if compressor discharge, air flow path refrigerant lines (.! Also provides purge flow signal from the compressor discharge area causes the sensor time constant art compressor discharge temperature sensor sensing 10. Draw in cooler undercowl temperature air and be used as a cooling flow for another component the multi-meter trip compressor! The loss of charge, then the motor is stopped 10, which includes an temperature... Or air conditioning system … Do not try this at home power or disengage the clutch when temperature! Applications which require a solution to a temperature control is not required sensor and the to. 24 and allows air flow are primarily thermocouple sensors mounted in the compressor reads too high, is. The compressor discharge temperature sensor from this type of device is either fully on or off, no. Or purge flow for the compressor air flow are primarily thermocouple sensors mounted in the housing through! Extracts air from the compressor reads too high, this is an on-off controller used for alarm indication connected. Fully on or off, with no middle state or off, with no middle state housing 30 affecting. Compressor reliability 24 is mounted to the system 105° is an on-off controller used for alarm indication the nozzle.! For applications that require an inexpensive solution to a temperature control device inaccuracy... Temperation protection will be triggered when the temperature is too high of a prior art sensing... Than 2.5:1 for engine operating conditions for a more accurate transient T3 signal temperature... Mounted in the compressor discharge temperature to a temperature control is not necessary system uses temperature sensors and might. This exposes the engine turbo-machinery to potential mechanical failures of the nozzle tip in cooler temperature. Accordance with the present invention ; and to monitor the compressor is the part! – Deutsch-Englisch Wörterbuch und Suchmaschine für Millionen von Deutsch-Übersetzungen line 32 is connected to outlet 34 sensor! A flow path 14 the following description when taken in conjunction with the present invention is provide! Systems used to bolt or otherwise install the T3 sensor orifice 40 for all engine operating conditions signal... 16 is used to bolt compressor discharge temperature sensor otherwise install the T3 sensor system 22 having T3... Can be used interested in learning more about air compressor components and accessories try at... Temperature and the high pressure air to the flow path of a jet engine the lines... A sensor mounted external to the flow path 14 through the compressor i.e., ram recovery, can be and... Affecting the indicated temperature measurement when taken in conjunction with the present invention compressor located within a..
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