EP0453302A1 - Kältekreislauf mit Diagnosegerät - Google Patents
Kältekreislauf mit Diagnosegerät Download PDFInfo
- Publication number
- EP0453302A1 EP0453302A1 EP91303518A EP91303518A EP0453302A1 EP 0453302 A1 EP0453302 A1 EP 0453302A1 EP 91303518 A EP91303518 A EP 91303518A EP 91303518 A EP91303518 A EP 91303518A EP 0453302 A1 EP0453302 A1 EP 0453302A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diagnostic sensor
- refrigeration
- equipment
- sensor unit
- network
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/008—Alarm devices
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
Definitions
- This invention relates to diagnostic equipment and more particularly to diagnostic equipment to identify faults in refrigeration equipment.
- Diagnosis of the fault, which caused failure in the equipment is facilitated by applying 'clip-on' or 'plug-in' test equipment and by manually inspecting and testing each of the refrigerator circuit components e.g. the fans or compressors, until the fault is identified and a repair of the equipment is made.
- the refrigerator circuit components e.g. the fans or compressors
- An aim of the present invention is to overcome the above disadvantages and provide an in situ diagnostic equipment to identify faults at the earliest opportunity.
- a diagnostic sensor unit for monitoring and identifying faults in equipment such as refrigeration units, comprising a microprocessor module powered by an independent power supply to the equipment being monitored, a plurality of inputs for connection to locations in the refrigeration equipment and a status indicator display, wherein the input from the locations is learnt by the microprocessor and any change in the inputs from these locations is compared with the learnt inputs and significant changes indicated as faults on the display.
- the diagnostic sensor unit can be connected to a data collection device such as a modem.
- a refrigeration circuit comprising at least one refrigeration unit, a plurality of locations, designating physical parameters around the circuit, being connected to a control box, and a diagnostic sensor unit as set forth in the two preceding paragraphs in situ in the refrigeration circuit so that the diagnostic sensor unit monitors and identifies faults in the refrigeration circuit.
- the system is designed for the monitoring of faults in, for example, refrigeration equipment and is equally applicable to both single cooling units such as cold cabinets and networked or multiple units (e.g. building air conditioning and public house cellars).
- the diagnostics are based upon the system diagrammatically shown in Fig. 1 comprising a schematic view of a typical refrigeration circuit.
- the circuit comprises a condenser 1 cooled by a fan 2, refrigerant is fed from a compressor 3 to the condenser via a control valve 4 to an evaporator 5 also cooled by a fan 6.
- the refrigerant circulates in the system to provide a refrigeration unit e.g. a cold store display cabinet.
- the various electrical units of the system are connected with a controller 7 which can also connect the system with other electric control or protection devices at inputs 8.
- Each cooling unit 9, indicated in chain dotted line, is monitored by a diagnostic sensor unit (DSU) 10 which receives the inputs from the circuit voltage, controllers, temperatures, currents and pressures at 11.
- the DSU 10 is also connected with a status indicator display 12 indicating the current status of each device being monitored by the DSU 10.
- DSU diagnostic sensor unit
- each refrigeration unit 13 to 16 is monitored by a DSU which indicates the status of the particular device.
- Individual DSU's are linked on a network cable 17 which supplies the electric power and communication media to the units.
- the network power supply 18 is generated in a single mains transformer (not shown) capable of supplying up to thirty-two stations.
- Control of the network is via a single network controller 19 which is also used as the primary means of indicating faults.
- the network may optionally be connected with a modem or other data collection device 20 to enable the alarm or details of the faults diagnosed to be recorded or viewed from a remote location.
- FIG. 3 An embodiment of a DSU electronic circuit is shown in Fig. 3 and comprises a microprocessor module 21 including a microprocessor 22, a ROM 23, a RAM 24, an EEPROM 25, a system clock 26, an analogue to digital converter (ADC) 27 and a digital interface 28.
- a microprocessor module 21 including a microprocessor 22, a ROM 23, a RAM 24, an EEPROM 25, a system clock 26, an analogue to digital converter (ADC) 27 and a digital interface 28.
- ADC analogue to digital converter
- the ADC 27 is connected with temperature channels 29 and current channels 30, while the digital interface is connected to an opto-isolator circuit 31.
- the microprocessor module 21 is interfaced with network communications package 32 and a serial communications package 33.
- the temperature channels 29 include circuitry which performs the function of interfacing up to six temperature sensors 34 to the ADC 27.
- the main task of this circuit is to amplify the sensor signals into the correct range of the ADC.
- the circuit of the current channels 30 performs an identical task to the temperature channels the main difference being the sine-wave type signals given out by the sensors. Analysis of the signals is actually conducted through the microprocessor.
- the opto-isolator 31 is used to monitor for the presence of main voltage in the refrigration equipment.
- the microprocessor 22 has a built in ADC and digital ports.
- the system ROM chip 23 holds all of the software used by the DSU.
- the system RAM chip 24 (Randam Access Memory) holds all the system data and variables while the DSU remains powered up.
- the EEPROM 25 (Electrically Erasable Read Only Memory) is used to hold all setup data and a full fault history of the refrigeration unit.
- the advantage of the EEPROM is that the data is retained even when power has been removed.
- the system clock 26 provides the real time clock for use by the microprocessor 22.
- the network communications package 32 is an integrated circuit used to translate serial data sent by the microprocessor 22 in the voltage levels used by an RS 485 network.
- the package also contains a direction pin to determine whether data is being transmitted or received.
- the serial communications package 33 is an integrated circuit which is used to translate serial data sent by the microprocessor 22 into the correct voltage levels for RS232 communications.
- the circuit also includes all of the handshaking procedures required by a modem.
- the function of the software is to store and process up to twelve channels of analogue information collected from the refrigeration circuit, temperature sensors and current sensors. Digital states e.g. the power supply on/off are also monitored. Analogue information is stored in a series of buffers (32 bytes per channel).
- a sampling window is defined to be active i.e. 'open' when the refrigeration unit is cycling on.
- the window is 'open' both temperatures and current information is stored. The oldest sample in the buffer is lost as each new sample is stored.
- faults are identified by comparing the present status of the refrigeration unit with the profile generated during the learning process.
- the DSU performs all of the diagnostics on the refrigeration equipment and operates as follows:
- a series of measurements are made of the physical characteristics located around the refrigeration circuit i.e. temperatures, currents, digital states and any other related physical feature of the equipment being monitored. These readings are then compared with the known characteristics of the equipment and significant deviations from the normal readings are indicated as faults.
- Thermostat position, mains voltage and status of protection devices are thermostat position, mains voltage and status of protection devices.
- the DSU will read the various parameters at the locations around the refrigeration circuit and, by the application of algorithms, will generate a normal operating profile for the refrigeration unit which constitutes the learning process.
- the DSU will apply a series of tests which compare the operating profile with the 'learnt profile' to determine e.g. whether the compressor current is greater than normal. Faults will then be indicated using the decisions as the basis.
- each DSU In a network arrangement in, for example, a public house cellar, the fault status of each DSU would be passed back to the network controller. In cases where the DSU is being applied in isolation, faults are communicated using a series of indicator lamps and/or by a modem link.
- the type of faults which would be monitored in a cellar cooler would be as follows: Condenser blocked, Evaporator blocked, Thermostat O/C, LP contact, HP contact mains failure, Thermostat S/C, Evaporator fan failed, condenser fan failed and compressor failed.
- the network controller has two main purposes:
- Each DSU is allocated a station number between one and thirty-two and the controller will then ask each of these stations to transmit their fault status. On receipt of this status information the network controller will display the fault on a liquid crystal display (LCD).
- LCD liquid crystal display
- the network controller will also perform the task of sending out fault status through a modem link.
- the DSU can also be interrogated using a standard IBM PC type computer or a portable computer unit sold under the trade name PSION organiser.
- the network power supply for the DSU's are held separate from those of the refrigeration equipment to minimise the possibility of a common mode failure i.e. loss of power masking a fault in the refrigeration unit.
- Network power is generated using standard power supply techniques, the only requirement is for a mains supply.
- the DSU of the present invention has a number of advantages over existing monitoring equipment.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB909008788A GB9008788D0 (en) | 1990-04-19 | 1990-04-19 | Diagnostic equipment |
GB9008788 | 1990-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0453302A1 true EP0453302A1 (de) | 1991-10-23 |
Family
ID=10674652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91303518A Ceased EP0453302A1 (de) | 1990-04-19 | 1991-04-19 | Kältekreislauf mit Diagnosegerät |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0453302A1 (de) |
GB (1) | GB9008788D0 (de) |
Cited By (50)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0660050A3 (de) * | 1993-12-23 | 1997-01-15 | Carrier Corp | Anzeigedisplay zum Schutz von Kompressoren. |
WO2000009955A2 (en) * | 1998-08-10 | 2000-02-24 | Diffusion Environmental Systems Ltd. | Control unit for air conditioning |
GB2356725A (en) * | 1999-11-29 | 2001-05-30 | Plus Design Ltd | Refrigerator monitoring and alarm system |
WO2001067014A1 (de) * | 2000-03-09 | 2001-09-13 | Danfoss A/S | Verfahren zum entdecken von fehlern in einer kühlanlage |
EP1209427A1 (de) * | 2000-11-22 | 2002-05-29 | Copeland Corporation | Wartungseinrichtung und -methode einer Klimaanlage |
EP1139041A3 (de) * | 2000-03-31 | 2002-09-11 | SANYO ELECTRIC Co., Ltd. | Lager und Überwachungsanordnung dazu |
EP1245913A1 (de) * | 2001-03-27 | 2002-10-02 | Copeland Corporation | Diagnostisches System für Verdichter |
EP1245912A2 (de) * | 2001-03-27 | 2002-10-02 | Copeland Corporation | Kompressordiagnosesystem |
WO2003089855A1 (de) * | 2002-04-22 | 2003-10-30 | Danfoss A/S | Verfahren zum auswerten einer nicht gemessenen betriebsgrösse in einer kälteanlage |
WO2004055455A1 (de) * | 2002-12-13 | 2004-07-01 | KKW Kulmbacher Klimageräte-Werk GmbH | Verfahren und vorrichtung zur überprüfung einer drucküberwachungseinrichtung einer kompressions-kälteanlage |
WO2004094929A1 (en) * | 2003-04-23 | 2004-11-04 | Kendro Laboratory Products, Lp | Compressor operation following sensor failure |
US7290989B2 (en) | 2003-12-30 | 2007-11-06 | Emerson Climate Technologies, Inc. | Compressor protection and diagnostic system |
US7419192B2 (en) | 2005-07-13 | 2008-09-02 | Carrier Corporation | Braze-free connector utilizing a sealant coated ferrule |
US7472557B2 (en) | 2004-12-27 | 2009-01-06 | Carrier Corporation | Automatic refrigerant charging apparatus |
US7552596B2 (en) | 2004-12-27 | 2009-06-30 | Carrier Corporation | Dual thermochromic liquid crystal temperature sensing for refrigerant charge indication |
EP1598612A3 (de) * | 1997-09-29 | 2009-07-15 | Emerson Climate Technologies, Inc. | Selbstanpassende Steuerung für eine einen Spiralverdichter mit pulsbreitenmoduliertem Betrieb verwendende Kälteanlage |
US7610765B2 (en) | 2004-12-27 | 2009-11-03 | Carrier Corporation | Refrigerant charge status indication method and device |
US7644591B2 (en) | 2001-05-03 | 2010-01-12 | Emerson Retail Services, Inc. | System for remote refrigeration monitoring and diagnostics |
US7665315B2 (en) | 2005-10-21 | 2010-02-23 | Emerson Retail Services, Inc. | Proofing a refrigeration system operating state |
US7681407B2 (en) | 2002-07-08 | 2010-03-23 | Danfoss A/S | Method and a device for detecting flash gas |
US7685830B2 (en) | 2002-04-22 | 2010-03-30 | Danfoss A/S | Method for detecting changes in a first media flow of a heat or cooling medium in a refrigeration system |
US7712319B2 (en) | 2004-12-27 | 2010-05-11 | Carrier Corporation | Refrigerant charge adequacy gauge |
CN101728815A (zh) * | 2008-10-27 | 2010-06-09 | 泰州乐金电子冷机有限公司 | 压缩机 |
US7752854B2 (en) | 2005-10-21 | 2010-07-13 | Emerson Retail Services, Inc. | Monitoring a condenser in a refrigeration system |
US7878006B2 (en) | 2004-04-27 | 2011-02-01 | Emerson Climate Technologies, Inc. | Compressor diagnostic and protection system and method |
US7885959B2 (en) | 2005-02-21 | 2011-02-08 | Computer Process Controls, Inc. | Enterprise controller display method |
US8100167B2 (en) | 2002-10-15 | 2012-01-24 | Danfoss A/S | Method and a device for detecting an abnormality of a heat exchanger, and the use of such a device |
US8160827B2 (en) | 2007-11-02 | 2012-04-17 | Emerson Climate Technologies, Inc. | Compressor sensor module |
US8290722B2 (en) | 2006-12-20 | 2012-10-16 | Carrier Corporation | Method for determining refrigerant charge |
US8393169B2 (en) | 2007-09-19 | 2013-03-12 | Emerson Climate Technologies, Inc. | Refrigeration monitoring system and method |
US8473106B2 (en) | 2009-05-29 | 2013-06-25 | Emerson Climate Technologies Retail Solutions, Inc. | System and method for monitoring and evaluating equipment operating parameter modifications |
US8495886B2 (en) | 2001-05-03 | 2013-07-30 | Emerson Climate Technologies Retail Solutions, Inc. | Model-based alarming |
US8590325B2 (en) | 2006-07-19 | 2013-11-26 | Emerson Climate Technologies, Inc. | Protection and diagnostic module for a refrigeration system |
US8700444B2 (en) | 2002-10-31 | 2014-04-15 | Emerson Retail Services Inc. | System for monitoring optimal equipment operating parameters |
US8964338B2 (en) | 2012-01-11 | 2015-02-24 | Emerson Climate Technologies, Inc. | System and method for compressor motor protection |
US8974573B2 (en) | 2004-08-11 | 2015-03-10 | Emerson Climate Technologies, Inc. | Method and apparatus for monitoring a refrigeration-cycle system |
US9140728B2 (en) | 2007-11-02 | 2015-09-22 | Emerson Climate Technologies, Inc. | Compressor sensor module |
US9285802B2 (en) | 2011-02-28 | 2016-03-15 | Emerson Electric Co. | Residential solutions HVAC monitoring and diagnosis |
US9310094B2 (en) | 2007-07-30 | 2016-04-12 | Emerson Climate Technologies, Inc. | Portable method and apparatus for monitoring refrigerant-cycle systems |
US9310439B2 (en) | 2012-09-25 | 2016-04-12 | Emerson Climate Technologies, Inc. | Compressor having a control and diagnostic module |
US9480177B2 (en) | 2012-07-27 | 2016-10-25 | Emerson Climate Technologies, Inc. | Compressor protection module |
US9551504B2 (en) | 2013-03-15 | 2017-01-24 | Emerson Electric Co. | HVAC system remote monitoring and diagnosis |
US9568226B2 (en) | 2006-12-20 | 2017-02-14 | Carrier Corporation | Refrigerant charge indication |
US9638436B2 (en) | 2013-03-15 | 2017-05-02 | Emerson Electric Co. | HVAC system remote monitoring and diagnosis |
US9759465B2 (en) | 2011-12-27 | 2017-09-12 | Carrier Corporation | Air conditioner self-charging and charge monitoring system |
US9765979B2 (en) | 2013-04-05 | 2017-09-19 | Emerson Climate Technologies, Inc. | Heat-pump system with refrigerant charge diagnostics |
US9823632B2 (en) | 2006-09-07 | 2017-11-21 | Emerson Climate Technologies, Inc. | Compressor data module |
CN108369055A (zh) * | 2015-12-18 | 2018-08-03 | 开利公司 | 用于监测对容器的电力供应的方法和系统 |
US10041713B1 (en) | 1999-08-20 | 2018-08-07 | Hudson Technologies, Inc. | Method and apparatus for measuring and improving efficiency in refrigeration systems |
US10488090B2 (en) | 2013-03-15 | 2019-11-26 | Emerson Climate Technologies, Inc. | System for refrigerant charge verification |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2064818A (en) * | 1979-11-30 | 1981-06-17 | Monitoring the operation of an industrial installation | |
FR2582430A1 (fr) * | 1985-05-23 | 1986-11-28 | Euram Umpi Ltd | Procede de transmission de signaux destines, notamment a la surveillance d'equipements particuliers, tels que par exemple des equipements d'alarme installes dans des appartements, et systeme pour la mise en oeuvre de ce procede |
US4653280A (en) * | 1985-09-18 | 1987-03-31 | Hansen John C | Diagnostic system for detecting faulty sensors in a refrigeration system |
US4660386A (en) * | 1985-09-18 | 1987-04-28 | Hansen John C | Diagnostic system for detecting faulty sensors in liquid chiller air conditioning system |
FR2589561A1 (fr) * | 1985-11-05 | 1987-05-07 | Froilabo | Procede de protection d'une installation frigorifique contre les depots d'additifs dans le circuit du fluide caloporteur, et centrale mettant en oeuvre un tel procede |
WO1987003988A1 (en) * | 1985-12-24 | 1987-07-02 | Monitronix Limited | Electronic sequential fault finding system |
EP0254253A2 (de) * | 1986-07-23 | 1988-01-27 | Nippondenso Co., Ltd. | Verfahren zum erfassen von kaeltemittelmangel in einer kaelteanlage |
WO1988002527A1 (en) * | 1986-09-29 | 1988-04-07 | Shepherd Intelligence Systems, Inc. | Aircraft security system |
FR2628558A1 (fr) * | 1988-03-14 | 1989-09-15 | Scl Security Computer Line Srl | Dispositif portatif et autonome ayant plusieurs fonctions de securite et d'alarme programmables |
EP0351833A2 (de) * | 1988-07-20 | 1990-01-24 | Mitsubishi Jukogyo Kabushiki Kaisha | Fehlerdiagnosesystem für Anlagen |
-
1990
- 1990-04-19 GB GB909008788A patent/GB9008788D0/en active Pending
-
1991
- 1991-04-19 EP EP91303518A patent/EP0453302A1/de not_active Ceased
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2064818A (en) * | 1979-11-30 | 1981-06-17 | Monitoring the operation of an industrial installation | |
FR2582430A1 (fr) * | 1985-05-23 | 1986-11-28 | Euram Umpi Ltd | Procede de transmission de signaux destines, notamment a la surveillance d'equipements particuliers, tels que par exemple des equipements d'alarme installes dans des appartements, et systeme pour la mise en oeuvre de ce procede |
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Cited By (122)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6460364B1 (en) | 1989-08-10 | 2002-10-08 | Diffusion Environmental Systems, Limited | Control unit for air-conditioning |
EP0660050A3 (de) * | 1993-12-23 | 1997-01-15 | Carrier Corp | Anzeigedisplay zum Schutz von Kompressoren. |
USRE42006E1 (en) | 1995-06-07 | 2010-12-28 | Emerson Climate Technologies, Inc. | Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor |
EP1598612A3 (de) * | 1997-09-29 | 2009-07-15 | Emerson Climate Technologies, Inc. | Selbstanpassende Steuerung für eine einen Spiralverdichter mit pulsbreitenmoduliertem Betrieb verwendende Kälteanlage |
WO2000009955A2 (en) * | 1998-08-10 | 2000-02-24 | Diffusion Environmental Systems Ltd. | Control unit for air conditioning |
WO2000009955A3 (en) * | 1998-08-10 | 2000-05-25 | Diffusion Environmental System | Control unit for air conditioning |
US10041713B1 (en) | 1999-08-20 | 2018-08-07 | Hudson Technologies, Inc. | Method and apparatus for measuring and improving efficiency in refrigeration systems |
GB2356725A (en) * | 1999-11-29 | 2001-05-30 | Plus Design Ltd | Refrigerator monitoring and alarm system |
DE10011110B4 (de) * | 2000-03-09 | 2004-08-26 | Danfoss A/S | Verfahren zum Entdecken von Fehlern in einer Kühlanlage |
DE10011110A1 (de) * | 2000-03-09 | 2001-10-04 | Danfoss As | Verfahren zum Entdecken von Fehlern in einer Kühlanlage |
WO2001067014A1 (de) * | 2000-03-09 | 2001-09-13 | Danfoss A/S | Verfahren zum entdecken von fehlern in einer kühlanlage |
EP1139041A3 (de) * | 2000-03-31 | 2002-09-11 | SANYO ELECTRIC Co., Ltd. | Lager und Überwachungsanordnung dazu |
US6529133B2 (en) | 2000-03-31 | 2003-03-04 | Sanyo Electric Co., Ltd. | Repository and monitoring system therefor |
EP1209427A1 (de) * | 2000-11-22 | 2002-05-29 | Copeland Corporation | Wartungseinrichtung und -methode einer Klimaanlage |
US6560976B2 (en) | 2000-11-22 | 2003-05-13 | Copeland Corporation | Data acquisition system and method |
US7412839B2 (en) | 2000-11-22 | 2008-08-19 | Emerson Climate Technologies, Inc. | Remote data acquisition system and method |
US7174728B2 (en) | 2000-11-22 | 2007-02-13 | Emerson Climate Technologies, Inc. | Remote data acquisition system and method |
US6823680B2 (en) | 2000-11-22 | 2004-11-30 | Copeland Corporation | Remote data acquisition system and method |
EP2284462A3 (de) * | 2001-03-27 | 2016-08-10 | Emerson Climate Technologies, Inc. | Verdichterdiagnosesystem |
US7162883B2 (en) | 2001-03-27 | 2007-01-16 | Emerson Climate Technologies, Inc. | Compressor diagnostic method |
US6758050B2 (en) | 2001-03-27 | 2004-07-06 | Copeland Corporation | Compressor diagnostic system |
EP1245913A1 (de) * | 2001-03-27 | 2002-10-02 | Copeland Corporation | Diagnostisches System für Verdichter |
EP1245912A2 (de) * | 2001-03-27 | 2002-10-02 | Copeland Corporation | Kompressordiagnosesystem |
EP1659291A3 (de) * | 2001-03-27 | 2016-08-03 | Emerson Climate Technologies, Inc. | Diagnostisches System für Verdichter |
EP1493981A3 (de) * | 2001-03-27 | 2005-04-27 | Copeland Corporation | Diagnostisches System für Verdichter |
EP1493980A3 (de) * | 2001-03-27 | 2005-05-04 | Copeland Corporation | Diagnostisches System für Verdichter |
CN1821577B (zh) * | 2001-03-27 | 2013-08-14 | 艾默生环境优化技术有限公司 | 压缩机诊断系统 |
EP1245912A3 (de) * | 2001-03-27 | 2002-12-04 | Copeland Corporation | Kompressordiagnosesystem |
US7647783B2 (en) | 2001-03-27 | 2010-01-19 | Emerson Climate Technologies, Inc. | Compressor diagnostic system |
US6758051B2 (en) | 2001-03-27 | 2004-07-06 | Copeland Corporation | Method and system for diagnosing a cooling system |
CN1821578B (zh) * | 2001-03-27 | 2010-12-22 | 艾默生环境优化技术有限公司 | 压缩机诊断系统 |
US7222493B2 (en) | 2001-03-27 | 2007-05-29 | Emerson Climate Technologies, Inc. | Compressor diagnostic system |
US7260948B2 (en) | 2001-03-27 | 2007-08-28 | Copeland Corporation | Compressor diagnostic system |
US7980085B2 (en) | 2001-03-27 | 2011-07-19 | Emerson Climate Technologies, Inc. | Compressor diagnostic system |
US7313923B2 (en) | 2001-03-27 | 2008-01-01 | Emerson Climate Technologies, Inc. | Compressor diagnostic system for communicating with an intelligent device |
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