CN104566819B - System and method for monitoring temperature stress of air conditioner - Google Patents
System and method for monitoring temperature stress of air conditioner Download PDFInfo
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- CN104566819B CN104566819B CN201410835960.XA CN201410835960A CN104566819B CN 104566819 B CN104566819 B CN 104566819B CN 201410835960 A CN201410835960 A CN 201410835960A CN 104566819 B CN104566819 B CN 104566819B
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- pfc circuit
- igbt
- frd
- temperature stress
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Classifications
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- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
Abstract
The invention discloses a system and a method for monitoring the temperature stress of an air conditioner. The method includes the steps: acquiring operating parameters of a PFC (power factor correction) circuit of an outdoor unit at a preset time interval; calculating temperature stress parameters of the PFC circuit according to the operating parameters; accumulating operating time of the outdoor unit when the temperature stress parameters exceed a temperature threshold, judging whether the accumulated operating time is longer than preset temperature stress release time or not, and if yes, sending a temperature stress release operating order to the outdoor unit. The system and the method for monitoring the temperature stress of the air conditioner have the advantages that by monitoring of the temperature stress parameters of the PFC circuit, temperature stress release is carried out when the operating time with the temperature stress exceeded reaches the upper limit, and consequently the air conditioner is enabled to operate under a load lower than a rated load, and reliability of equipment is improved while service life of the equipment is prolonged.
Description
Technical field
The present invention relates to airconditioning control field, the monitoring method and system of more particularly to a kind of air-conditioner temperature stress.
Background technology
With the extensive application of the development of Power Electronic Technique, particularly converter technique, the air-conditioner of current main flow is in system
Cold heating effect, humid control, purification of air and energy-conservation aspect have huge progress.By wireless communication technique and mutually
Networking technology is applied in air-conditioning, and current air-conditioner is obtained at aspects such as hommization, household, intellectuality and energy-savings and known clearly extensively
General research and application.
At present in the detachable air conditioner of domestic applications, off-premises station all works in the environment of rather harsh.Typical case
Off-premises station be mounted in outdoor wall on, Yian fill region difference, off-premises station work environment temperature may be from -20 DEG C
To 50 DEG C of changes.
In convertible frequency air-conditioner, off-premises station circuit is mainly by rectification circuit, PFC (Power Factor
Correction, PFC) circuit and inverter circuit composition.Input AC civil power becomes the direct current pulsed after rectification circuit
Electricity.Pfc circuit mainly includes inductance, electric capacity, sampling resistor, igbt (Insulated Gate Bipolar
Transistor, IGBT) and fast recovery diode (Fast Recovery Diode, FRD).After the adjustment of pfc circuit,
The voltage of DC side output is a steady state value, while AC input current and input voltage have identical phase place.Direct current
The DC voltage of side output variable alternating voltage of output amplitude and frequency Jing after inverter circuit, drives the operating of compressor.
Because off-premises station is operated in rugged environment, therefore strict requirements are proposed to outdoor automatically controlled reliability.Pfc circuit exists
Big electric current is flow through during normal work, therefore the power semiconductor in circuit will consume very big power, this causes it
Junction temperature is significantly larger than environment temperature.Pfc circuit operationally bears very high temperature stress, and its reliability is outdoor automatically controlled reliability
One of key factor of property.
The content of the invention
Based on this, it is necessary to provide a kind of monitoring method of air-conditioner temperature stress, the temperature stress of pfc circuit is carried out
Monitoring, it is ensured that air-conditioner can more intelligence and reliable operation.
The invention provides a kind of monitoring method of air-conditioner temperature stress, comprises the following steps：
S110, the operational factor of the pfc circuit of off-premises station is obtained every Preset Time；
S120, the junction temperature and the junction temperature of FRD of the middle IGBT of the pfc circuit are calculated according to the operational factor；
S130, accumulates the off-premises station and operates in the junction temperature of the IGBT and the junction temperature of FRD at least one beyond corresponding
Temperature threshold run time；
S140, judges whether accumulated run time is more than the preset temperature Stress Release time, if then execution step
S150, otherwise execution step S110；
S150, sends a command to the off-premises station, makes the off-premises station perform temperature stress release operation.
Additionally, a kind of monitoring system of air-conditioner temperature stress is additionally provided, including data obtaining module, data analysis mould
Block and control module, wherein：
Described information acquisition module is used to obtain the operational factor of the pfc circuit of off-premises station every Preset Time；
The data analysis module be used for according to the operational factor calculate the pfc circuit middle IGBT junction temperature and
The junction temperature of FRD；
The control module is operated at least one in the junction temperature of the IGBT and the junction temperature of FRD for accumulating the off-premises station
The individual run time beyond corresponding temperature threshold；It is additionally operable to judge accumulated run time whether more than preset temperature stress
Release time, the off-premises station is if so, then sent a command to, make the off-premises station perform temperature stress release operation, otherwise institute
State data obtaining module to rerun.
The monitoring method and system of above-mentioned air-conditioner temperature stress can pass through monitoring pfc circuit middle IGBT junction temperature and
The junction temperature of FRD, to judge whether the run time in high-temperature stress of system reaches the upper limit.Thus, air-conditioner can be caused
Can be operated in less than the reliability and service life in the state of rated load, improving equipment.
Description of the drawings
Fig. 1 is the module map of the monitoring system of air-conditioner temperature stress in present pre-ferred embodiments；
Fig. 2 is the structural representation of the typical pfc circuit of air-conditioner outdoor unit；
Fig. 3 is the flow chart of the monitoring method of air-conditioner temperature stress in present pre-ferred embodiments；
Fig. 4 is the flow chart of the monitoring method of air-conditioner temperature stress in embodiment in more detail of the invention.
Specific embodiment
In order that the technical problem to be solved in the present invention, technical scheme and beneficial effect become more apparent, below in conjunction with
Drawings and Examples, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
Fig. 1 is referred to, the monitoring system of air-conditioner temperature stress in present pre-ferred embodiments, in the present embodiment, can be with
Run as core carrier with air-conditioner 10, or run by core carrier of client 20 (intelligent terminal).Below with visitor
Family end 20 is core carrier operation, describes presently preferred embodiments of the present invention in detail.
The monitoring system of air-conditioner temperature stress includes air-conditioner 10, client 20 and Cloud Server 30, the client 20
With the air-conditioner 10 and the network communication of Cloud Server 30.
Air-conditioner 10 includes data acquisition module 11, controller 12 and communication module；Data acquisition module 11 is main to room
The operational factor of the pfc circuit of outer machine is sampled in real time, and controller 12 is controlled to the running status of air-conditioner 10.
Client 20 include data obtaining module 21, data analysis module 22, control module 23, data disaply moudle 24 with
And communication module.Data obtaining module 21 mainly completes initialized work, obtains the type information and air-conditioner of air-conditioner 10
10 geographical position installed, and it is sent to Cloud Server 30.The retrieval air-conditioning information of Cloud Server 30 database 31, and send corresponding
The air-conditioning data (the mainly mutual electrical parameter information of the composition device of pfc circuit) of model give data analysis module 22,
Being transmitted in when data analysis module 22 runs for the first time for the data is carried out, and is subsequently synchronized when air-conditioning information database update
Renewal.The main data to obtaining from air-conditioner 10 and Cloud Server 30 of data analysis module 22 are analyzed calculating, are given
The temperature stress data of pfc circuit.Control module 23 mainly carries out monitor in real time, and defeated to the output data of data analysis module 22
Go out control signal to the control module 23 of air-conditioner 10.Data disaply moudle 24 is defeated to data analysis module 22 and control module 23
The data for going out are carried out in real time, intuitively show.
Cloud Server 30 includes air-conditioning information database 31 and communication module.
In the present embodiment, the environment temperature of air-conditioner 10 can be obtained by weather server 40, it is also possible to by arranging
Temperature sensor on off-premises station obtains environment temperature.So, weather server 40 includes weather real-time data base 41 and leads to
News module.Cloud Server 30 is communicated with weather server 40, and air-conditioning is obtained from weather server 40 according to geographical position acquisition
The environment temperature in the geographical position that device 10 is located, and it is sent to the data analysis module 22 of client 20.If weather server
40 weather real-time data base 41 cannot connect, and the data analysis module 22 of intelligent terminal will ignore this temperature information, or pass through
The temperature sensor being disposed in the outdoor obtains environment temperature.
Each above-mentioned communication module is connected by network communication.Especially, it is communication module and the visitor of air-conditioner 10
The communication module connection at family end 20, the communication module of client 20 is connected with the communication module of Cloud Server 30, Cloud Server 30
Communication module be connected with the communication module of weather server 40.
In more detailed embodiment, system first arranges the preset temperature Stress Release time, when in pfc circuit running
The junction temperature of IGBT and/or the junction temperature of FRD operate in the summation of run time beyond temperature threshold and reach or more than default temperature
During the degree Stress Release time, then control air-conditioner 10 is performed and operated with release temperature stress accordingly.Fig. 1 and Fig. 2 is referred to, is had
Body ground：
Described information acquisition module 21 is used to obtain the operational factor of the pfc circuit of off-premises station every Preset Time.This is pre-
If the time can be arranged according to the size of preset temperature Stress Release time, adopted with 0.1%, 1% or 3% time as one
The sample cycle.The operational factor of pfc circuit includes that the operating current of the IGBT in output voltage, the pfc circuit of pfc circuit, PFC are electric
The operating current and environment temperature of the FRD in road.
The data analysis module 22 is used to calculate pfc circuit according to the operational factor and parameter information of pfc circuit
Middle IGBT junction temperature and the junction temperature of FRD.
Whether the control module 23 judges the junction temperature (temperature stress parameter) of the junction temperature of the middle IGBT of pfc circuit and FRD
At least one is more than corresponding temperature threshold.If so, junction temperature and FRD that the off-premises station operates in the IGBT are then accumulated
At least one run time beyond temperature threshold in junction temperature；Otherwise described information acquisition module 21 reruns, under entrance
The resampling of the operational factor of the pfc circuit in one sampling period.Beyond the run time of temperature threshold：Should to run on temperature
Force parameter adds up beyond the sampling period (i.e. above-mentioned Preset Time) of temperature stress standard (temperature threshold), runs on temperature stress
Parameter does not add up less than the sampling period of temperature stress standard.
Whether the control module 23 is additionally operable to judge accumulated run time more than the preset temperature Stress Release time.
If so, the off-premises station is then sent a command to, makes the off-premises station perform temperature stress release operation；Otherwise described information is obtained
Module 21 reruns, into the resampling of the operational factor of the pfc circuit in next sampling period.It should be noted that should
Preset Time is a preset value, when system operation above-mentioned IGBT junction temperature and FRD junction temperature at least one be more than phase
When the cumulative time of the temperature threshold answered exceeds the preset value, system will perform temperature stress release operation.
Off-premises station performs temperature stress release operation and is specially：Knot is reduced to IGBT in the thermal resistance of environment, reduction pfc circuit
Dissipated power and reduce one or more of three kinds of modes of dissipated power of FRD in pfc circuit.Knot is reduced to the thermal resistance of environment
The rotating speed that the outer blower fan of increase can be passed through and then the coefficient of heat transfer for increasing air；Reduce the dissipation work of IGBT, FRD in pfc circuit
Rate can be realized by the output current of instantaneous reduction pfc circuit.
In embodiments of the invention, can pass through monitoring can pass through monitoring pfc circuit middle IGBT junction temperature and FRD
Junction temperature, to judge whether the run time in high-temperature stress of system reaches the upper limit.Thus, air-conditioner can be enabled to work
In the state of less than rated load, the reliability and service life of equipment is improved.
Further, the calculating of the junction temperature of the junction temperature of the middle IGBT of pfc circuit and FRD need to rely on the parameter letter of pfc circuit
Breath is calculated.The parameter information can be pre-stored in monitoring system, it is also possible to obtained in real time.When obtaining in real time, it is possible to use information
Acquisition module 21 first obtains the model of the air-conditioner 10 and is uploaded to the Cloud Server 30；Then, Cloud Server 30 is from sky
Adjusting data storehouse 31 is sent to the client 20 according to the parameter information that the model searches pfc circuit；Finally, data analysis mould
Knot of the block 22 according to the operational factor, the junction temperature of parameter information and the environment temperature calculating IGBT and FRD of pfc circuit
Temperature.
Pfc circuit temperature stress is monitored and intelligent control method, to guarantee that air-conditioner 10 can be more intelligent and reliable
Operation.Described air-conditioner 10 by least one off-premises station and at least one indoor units into.The present invention not only can apply with
Domestic air conditioning, is also applied for Large Central Air Conditioning System system.
Refering to Fig. 2, typical pfc circuit includes：Input inductance L1, igbt (IGBT) Q1, fast recovery
Diode (FRD) D1, electrochemical capacitor C1 and current sampling resistor R1.By periodic turn-on and turn-off IGBT Q1, Ke Yi
Electrochemical capacitor C1 two ends obtain constant DC voltage (output voltage) Vout。
Refering to Fig. 1 and Fig. 2, the calculating of pfc circuit temperature stress is complete in the data analysis module 22 of intelligent terminal 20
Into.Temperature stress parameter includes junction temperature T of IGBT Q1j1With junction temperature T of FRD D1j2.According to the Ohm's law of heat transfer, work(
Dissipated power P of rate semiconductor devices, thermal resistance R of knot to environmentja, junction temperature Tj, temperature T of environmentaBetween meet following pass
System：
Tj=P*Rja+Ta,
Wherein, P for IGBT Q1 (or FRD D1) dissipated power, TjFor the junction temperature of IGBT Q1 (or FRD D1), RjaFor
IGBT Q1 (or FRD D1) knots arrive the thermal resistance of environment, TaFor the temperature of environment.
We take during calculating, and for IGBT Q1, its power consumption can be expressed as follows：
Pigbt=D*Ic*Vce+(Eon+Eoff)*fsw
For FRD D1, its power consumption can be expressed as follows：
Pfrd=(1-D) * Id*Vd+Err*fsw
Wherein D be control IGBT Q1 turn-on and turn-off pulse signal dutycycle, IcAnd IdRespectively flow through IGBT Q1
With the operating current of FRD Q2, VceAnd VdThe respectively forward conduction voltage drop of IGBT Q1 and FRD D1, EonAnd EoffRespectively
The turn-on and turn-off loss of IGBT Q1, ErrFor the reverse recovery loss of FRD D1, fswFor the switching frequency of IGBT Q1.Wherein,
D, Ic, IdAnd fswDirect access or can indirectly be calculated from sampled data, due to Ic, IdBecome with the time with D
Change, therefore its mean value should be adopted in calculating.VceFor IcFunction, VdFor IdFunction, other data are from Cloud Server
Air-conditioning database in obtain.Therefore correspondence and each sampling instant, can calculate junction temperature T of the IGBT Q1 for providing determinationj1
With junction temperature T of FRD D1j2.By monitoring IGBT Q1 operating current IcWith the operating current I of FRD Q2dChange both can supervise
Junction temperature T of control IGBT Q1j1With junction temperature T of FRD D1j2Change.
Fig. 3 is referred to, the monitoring method of air-conditioner temperature stress is comprised the following steps：
Step S110, the operational factor of the pfc circuit of off-premises station is obtained every Preset Time.
Step S120, the junction temperature and the junction temperature of FRD of the middle IGBT of the pfc circuit are calculated according to the operational factor.
Step S130, accumulates the off-premises station and operates in the junction temperature of the IGBT and the junction temperature of FRD at least one and exceed
The run time of corresponding temperature threshold.
Step S140, judges whether accumulated run time is more than the preset temperature Stress Release time, if then performing
Step S150, otherwise execution step S110.
S150, sends a command to the off-premises station, makes the off-premises station perform temperature stress release operation
With reference to Fig. 1 and Fig. 3, control module 23 is first to junction temperature T of IGBT Q1j1With junction temperature T of FRD D1j2Sentenced
It is disconnected.For IGBT Q1 and FRD D1, maximum junction temperature T allowed when can provide its trouble free service on product manualjmax, typically
For 150 DEG C, 175 DEG C can be reached using newest technique.There is electric current during switch in the power device in pfc circuit
With the ripple of voltage, thus cause the ripple of its junction temperature, we calculate junction temperature T of the IGBT Q1 for providingj1With the junction temperature of FRD D1
Tj2It is actually mean value of the junction temperature within the multiple switch cycle.In typical case, it is contemplated that the impact of design of Reducing Rating and ripple,
Junction temperature T of IGBT Q1j1With junction temperature T of FRD D1j2Temperature threshold be usually set to Tjmax60%-80%, i.e. IGBTQ1's
Junction temperature Tj1With junction temperature T of FRD D1j2Corresponding temperature threshold may be provided at 90 DEG C to 140 DEG C.
If junction temperature T of IGBT Q1j1With junction temperature T of FRD D1j2In have maximum junction temperature T of one or more diodesjm
Numerical value be unsatisfactory for the standard of low stress, then this sampling time count stress run time (the i.e. preset temperature stress of pfc circuit
Release time) in.If the time of stress operation reaches higher limit, control module 23 sends control instruction to the control of air-conditioner 10
Device processed 12, controller 12 performs corresponding temperature stress release operation.
In a still further embodiment, the monitoring method of air-conditioner temperature stress is further comprising the steps of：
User sets operational factor, and air-conditioner 10 brings into operation；Intelligent terminal 20 obtains air-conditioner model and positional information,
And manufacturer's Cloud Server 30 is uploaded to by communication module；Cloud Server 30 searches the model of air-conditioner 10 from database,
Obtain and calculate the parameter information of pfc circuit temperature stress, and be sent to intelligent terminal 20；Air-conditioner 10 is every Fixed Time Interval
Sampling outdoor environment temperature Ta, the operating current I of pfc circuitc、IdWith output voltage Vout；Air-conditioner 10 will by communication module
Sampled data is sent to the data analysis module 22 of intelligent terminal 10；Data analysis module 22 calculates the knot of IGBT in pfc circuit
Warm Tj1With junction temperature T of FRDj2；Data analysis module 22 sends result of calculation to control module 23 and data disaply moudle 24.
In more detail, the present embodiment is with client 20 and internet remote service to rely on, by installed in intelligent terminal
Data analysis module 22 and control module 23 monitor in real time and Based Intelligent Control are carried out to the temperature stress of off-premises station pfc circuit.
Fig. 1 and Fig. 4 is referred to, more detailed flow process comprises the steps：
Step S10, air-conditioning brings into operation according to the parameter that user sets；
Step S11, intelligent terminal (i.e. client 20) obtains first the type information and installation site information of air-conditioner 10,
Then it is sent in manufacturer's Cloud Server 30 by communication module.
Step S12, Cloud Server 30 is searched in air-conditioning information database 31 and calculates the pass that pfc circuit temperature stress needs
Bond parameter, is then sent to intelligent terminal by communication module.
Step S13, Cloud Server 30 is communicated by communication module and weather server 40, obtains the region of air-conditioner 10
Environment temperature Ta, and send back intelligent terminal.Environment temperature TaCan be with real-time update.
Step S14, air-conditioner 10 is spaced at every fixed time the operational factor of the pfc circuit to off-premises station and adopts
Sample, typical operational factor includes：Environment temperature T of off-premises stationa, the operating current I of pfc circuitc、IdAnd output voltage.Air-conditioning
Device 10 is sent to sampled data by communication module the data analysis module 22 of intelligent terminal 20.If regional environment temperature Ta
Cannot in real time be obtained by weather server 40, then can be detected using temperature sensor.
Step S15, the data that data analysis module 22 is sent using air-conditioner 10 and Cloud Server 30 calculate PFC electric
The temperature stress parameter on road, mainly includes：Junction temperature T of IGBT Q1j1With junction temperature T of FRD D1j2。
Step S16, data analysis module 22 is sent to data disaply moudle 24 and control module 23 result of calculation.
Step S17, junction temperature T of the control module 23 to the IGBT Q1 in off-premises station pfc circuit runningj1With FRD D1
Junction temperature Tj2Carry out monitor in real time.First to IGBT Q1 junction temperature Tj1With junction temperature T of FRD D1j2It is analyzed, judges it
Whether the standard of low stress is met.If all meeting low temperature stress criterion (i.e. junction temperature T of IGBT Q1j1With the junction temperature of FRD D1
Tj2Less than corresponding preset temperature threshold value), then wait the result in next sampling period and it is rejudged；If the two
In at least one be unsatisfactory for low temperature stress criterion, then when accumulation being operated in the operation for being unsatisfactory for low temperature stress criterion
Between.If operating in the operation total time for being unsatisfactory for low temperature stress criterion less than higher limit, the next sampling period is waited
As a result and to it rejudge.If operating in the operation total time for being unsatisfactory for low temperature stress criterion more than higher limit,
Then control module 23 sends control instruction to the controller 12 of air-conditioner 10 by communication module.
Step S18, air-conditioner 10 performs the release operation of temperature stress in the presence of controller 12.Junction temperature relative to
Environment temperature rise is equal to the dissipated power of power semiconductor and the product of the thermal resistance of knot to environment.Therefore any operation, only
Dissipated power P of IGBT in pfc circuit can be reducedigbtWith dissipated power P of FRDfrdOr the knot of IGBT and FRD is to ring
Thermal resistance R in borderja, it is considered as the release operation of temperature stress.
By the invention it is possible to monitor the junction temperature and FRD of the IGBT Q1 in off-premises station pfc circuit running in real time
The junction temperature of D1 simultaneously carries out Based Intelligent Control, so that it is guaranteed that the long-term reliability of off-premises station operation.
In another embodiment, with reference to Fig. 1, if the monitoring method and system of above-mentioned air-conditioner temperature stress are arranged on
In air-conditioner 10, then client can be omitted, the modules of client 20 can be arranged on air-conditioner in above-described embodiment
(in addition to communication module), air-conditioner 10 and the straight-forward network of Cloud Server 30 are communicated, the operation method and above-described embodiment of its system
It is identical, repeat no more here.
Embodiment described above only expresses the several embodiments of the present invention, all at this not to limit the present invention
Any modification, equivalent and improvement made within the spirit and principle of invention etc., should be included in the protection model of the present invention
Within enclosing.
Claims (9)
1. a kind of monitoring method of air-conditioner temperature stress, it is characterised in that comprise the following steps：
S110, the operational factor of the pfc circuit of off-premises station is obtained every Preset Time；
S120, the junction temperature and the junction temperature of FRD of the middle IGBT of the pfc circuit are calculated according to the operational factor；
S130, accumulates the off-premises station and operates in the junction temperature of the IGBT and the junction temperature of FRD at least one beyond corresponding temperature
The run time of degree threshold value；
S140, judges whether accumulated run time is more than the preset temperature Stress Release time, if then execution step S150,
Otherwise execution step S110；
S150, sends a command to the off-premises station, makes the off-premises station perform temperature stress release operation；
The off-premises station performs temperature stress release operation and is specially：Knot is reduced to IGBT in the thermal resistance of environment, reduction pfc circuit
Dissipated power and reduce one or more of three kinds of modes of dissipated power of FRD in pfc circuit.
2. monitoring method according to claim 1, it is characterised in that the operational factor of the pfc circuit includes pfc circuit
Output voltage, pfc circuit in IGBT operating current, pfc circuit in FRD operating current and environment temperature.
3. monitoring method according to claim 1, it is characterised in that the corresponding temperature threshold of the junction temperature be 90 DEG C extremely
140℃。
4. a kind of monitoring system of air-conditioner temperature stress, it is characterised in that including data obtaining module, data analysis module with
And control module, wherein：
Described information acquisition module is used to obtain the operational factor of the pfc circuit of off-premises station every Preset Time；
The data analysis module be used for according to the operational factor calculate the pfc circuit middle IGBT junction temperature and FRD
Junction temperature；
The control module is used to accumulate the off-premises station and operate at least one to surpass in the junction temperature of the IGBT and the junction temperature of FRD
Go out the run time of corresponding temperature threshold；It is additionally operable to judge accumulated run time whether more than preset temperature Stress Release
Time, the off-premises station is if so, then sent a command to, make the off-premises station perform temperature stress release operation, otherwise described letter
Breath acquisition module reruns；
The off-premises station performs temperature stress release operation and is specially：Knot is reduced to IGBT in the thermal resistance of environment, reduction pfc circuit
Dissipated power and reduce one or more of three kinds of modes of dissipated power of FRD in pfc circuit.
5. monitoring system according to claim 4, it is characterised in that the operational factor of the pfc circuit includes pfc circuit
Output voltage, pfc circuit in IGBT operating current, pfc circuit in FRD operating current and environment temperature.
6. monitoring system according to claim 4, it is characterised in that the corresponding temperature threshold of the maximum junction temperature is 90 DEG C
To 140 DEG C.
7. monitoring system according to claim 4, it is characterised in that the monitoring system also includes Cloud Server and visitor
Family end, the client and the air-conditioner and Cloud Server network communication, described information acquisition module, data analysis module and
Control module is arranged at the client or air-conditioner.
8. monitoring system according to claim 7, it is characterised in that described information acquisition module is additionally operable to obtain the sky
Adjust the model of device and be uploaded to the Cloud Server；
The Cloud Server is sent to the client according to the parameter information that the model searches the pfc circuit；
The data analysis module is according to the operational factor of the pfc circuit, parameter information and the environment temperature are calculated
The junction temperature of IGBT and the junction temperature of FRD.
9. monitoring system according to claim 8, it is characterised in that described information acquisition module, is additionally operable to obtain described
The geographical position of air-conditioner, and it is uploaded to the Cloud Server；
The Cloud Server, communicates with weather server, according to the acquisition air-conditioner in the geographical position is on-site
Environment temperature is simultaneously sent to the client.
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| CN201410835960.XA CN104566819B (en) | 2014-12-26 | 2014-12-26 | System and method for monitoring temperature stress of air conditioner |
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| CN201410835960.XA CN104566819B (en) | 2014-12-26 | 2014-12-26 | System and method for monitoring temperature stress of air conditioner |
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| CN104566819B true CN104566819B (en) | 2017-05-10 |
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| CN104848490B (en) * | 2015-05-18 | 2017-12-22 | 重庆三峡学院 | A kind of air-conditioning system based on cloud service remote debugging |
| JP6557517B2 (en) * | 2015-06-08 | 2019-08-07 | ルネサスエレクトロニクス株式会社 | Semiconductor integrated circuit device and electronic device |
| CN108072819B (en) * | 2016-11-10 | 2021-07-30 | 西门子公司 | IGBT failure detection method and device |
| CN109831102A (en) * | 2017-11-21 | 2019-05-31 | 河北工业大学 | A kind of method, apparatus and computer readable storage medium of loss calculation |
| CN110867835B (en) * | 2019-11-26 | 2021-12-17 | 广东美的制冷设备有限公司 | Intelligent power module and air conditioner |
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| JP5829986B2 (en) * | 2012-07-18 | 2015-12-09 | エスペック株式会社 | Power cycle test equipment |
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| US6483271B1 (en) * | 2000-11-14 | 2002-11-19 | Otis Elevator Company | Motor drive parameters |
| CN101621873A (en) * | 2009-07-24 | 2010-01-06 | 重庆大学 | Intelligent driving system and energy-saving control method of street lamp based on LED array |
| CN102312829A (en) * | 2010-07-02 | 2012-01-11 | 康奈可关精株式会社 | Electric compressor controller |
| CN103982980A (en) * | 2014-04-30 | 2014-08-13 | 广东美的制冷设备有限公司 | Anti-freezing control method and device for air conditioner heat exchanger |
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