CN108958208A - The fault recognition method of electric heater and its AD input unit - Google Patents
The fault recognition method of electric heater and its AD input unit Download PDFInfo
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- CN108958208A CN108958208A CN201710383121.2A CN201710383121A CN108958208A CN 108958208 A CN108958208 A CN 108958208A CN 201710383121 A CN201710383121 A CN 201710383121A CN 108958208 A CN108958208 A CN 108958208A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/10—Calibration or testing
- H03M1/1071—Measuring or testing
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- Automation & Control Theory (AREA)
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- Electric Stoves And Ranges (AREA)
Abstract
The invention discloses a kind of electric heater and its fault recognition methods of AD input unit, this method comprises: being compared when the heating time of accumulative timing being greater than or equal to the non-heating time of the first preset time and continuous timing less than the second preset time to the first maximum temperature detected value and the first minimum temperature detected value of the output of AD input unit；When the difference of the first maximum temperature detected value and the first minimum temperature detected value is less than or equal to preset threshold and heating total time is less than or equal to third preset time, control electric heater stops heating；When stopping heating time more than or equal to four preset times, the second maximum temperature detected value and the second minimum temperature detected value that stop AD input unit output in heating time are compared；When the difference of the second maximum temperature detected value and the second minimum temperature detected value is less than or equal to preset threshold, AD input unit failure is judged.The present invention improves the accuracy of fault identification.
Description
Technical field
The present invention relates to electric heater field more particularly to the fault identification sides of a kind of electric heater and its AD input unit
Method.
Background technique
In the prior art, the method for carrying out fault identification to the AD input unit of electric heater is usually using following identification
Method: when electric heater is in heated condition, the controller in electric heater carries out the heating time of the electric heater tired
Timing is counted, and continuous timing is carried out to the non-heating time of the electric heater；It is more than or equal to when the heating time of accumulative timing
When the non-heating time of first preset time and continuous timing is less than the second preset time, the controller obtains the electric heating
The device maximum temperature detected value that the interior AD input unit in non-heating time is exported when heated and minimum temperature
Detected value；Finally, according to the difference between the AD input unit maximum temperature detected value exported and minimum temperature detected value
Value judges whether the AD input unit of the electric heater breaks down.Specifically, it is exported when the AD input unit
When difference between maximum temperature detected value and minimum temperature detected value is greater than or equal to preset threshold, the AD input dress is judged
It sets normal；When the difference between the AD input unit maximum temperature detected value exported and minimum temperature detected value is less than in advance
If when threshold value, judging the AD input unit failure.
However, due to method that the above-mentioned AD input unit to electric heater in the prior art carries out fault identification be
The maximum temperature detected value and minimum temperature detected value that the heating period of electric heater is exported according to the AD input unit it
Between difference judge whether the AD input unit of the electric heater breaks down, and when the heating amount of electric heater is smaller or
After reaching boiling point, the variable quantity of the temperature detection value of the AD input unit output is smaller, so that in the prior art
State the appearance that erroneous judgement problem is be easy to cause to the method that the AD input unit of electric heater carries out fault identification.
Summary of the invention
The main purpose of the present invention is to provide a kind of fault recognition methods of the AD input unit of electric heater, it is intended to mention
Accuracy of the height to the fault identification of the AD input unit of electric heater.
To achieve the goals above, the present invention provides a kind of fault recognition method of the AD input unit of electric heater, institute
State the fault recognition method of the AD input unit of electric heater the following steps are included:
S10 carries out accumulative timing, and heating total time and institute to the electric heater to the heating time of electric heater
The non-heating time for stating electric heater carries out continuous timing respectively；
S20 is greater than or equal to the non-heating time of the first preset time and continuous timing in the heating time of accumulative timing
It is defeated to the AD input unit in the electric heater when heated interior and non-heating time when less than the second preset time
The first maximum temperature detected value and the first minimum temperature detected value out is compared；
S30, when the difference of the first maximum temperature detected value and the first minimum temperature detected value is less than or equal to
When the heating total time of preset threshold and continuous timing is less than or equal to third preset time, controls the electric heater and stop
Only heat；
S40, when stopping heating time more than or equal to four preset times, to the electric heater when stopping heating
The the second maximum temperature detected value and the second minimum temperature detected value of interior AD input unit output are compared；
S50, when the difference of the second maximum temperature detected value and the second minimum temperature detected value is less than or equal to described
When preset threshold, the AD input unit failure is judged.
Preferably, after the step S40 further include:
S60, when the difference of the second maximum temperature detected value and the second minimum temperature detected value is greater than the default threshold
When value, judge that the AD input unit is normal, and controls the electric heater and restore normal heated condition.
Preferably, after the step S20 further include:
S70, when the difference of the first maximum temperature detected value and the first minimum temperature detected value is greater than the default threshold
Value, or when the heating total time being greater than third preset time of continuous timing, to the heating time of accumulative timing and company
Continuous timing is zeroed out the heating total time.
Preferably, after the step S10 further include:
S80, when the non-heating time described in the continuous timing is greater than or equal to the second preset time, to the institute of accumulative timing
State being zeroed out the heating total time for heating time and continuous timing.
Preferably, the step S10 specifically:
When the electric heater is in heated condition, accumulative timing is carried out to the heating time of the electric heater, and
Continuous timing is carried out to the heating total time of the electric heater；When the electric heater is heated, to the electric heating
The non-heating time of device is zeroed out；When the electric heater is not heated, to the non-heating time of the electric heater
Carry out continuous timing.
In addition, to achieve the above object, the present invention also provides a kind of electric heater, the electric heater includes AD input dress
It sets and controller, the controller includes the first timer, the second timer, third timer, the 4th timer, data processing
Module, control module and judgment module；Wherein:
The AD input unit, is detected, and temperature detection value is defeated for the running parameter to the electric heater
Enter to the controller；
First timer carries out accumulative timing for the heating time to electric heater；
Second timer carries out continuous timing for the non-heating time to electric heater；
The third timer carries out continuous timing for the heating total time to electric heater；
4th timer carries out continuous timing for the stopping heating time to the electric heater；
The data processing module is greater than or equal to the first preset time for the timing time in first timer
And the timing time of second timer less than the second preset time when, to the electric heater when heated in and not plus
The the first maximum temperature detected value and the first minimum temperature detected value of AD input unit output in the hot time are compared；
And when the timing time of the 4th timer is greater than or equal to four preset times, the electric heater is being stopped adding
The the second maximum temperature detected value and the second minimum temperature detected value of AD input unit output in the hot time are compared；
The control module, for working as the difference of the first maximum temperature detected value and the first minimum temperature detected value
When value is less than or equal to third preset time less than or equal to the timing time of preset threshold and the third timer, institute is controlled
It states electric heater and stops heating；
The judgment module is small for the difference when the second maximum temperature detected value and the second minimum temperature detected value
When the preset threshold, the AD input unit failure is judged.
Preferably, the judgment module is also used to:
When the difference of the second maximum temperature detected value and the second minimum temperature detected value is greater than the preset threshold,
Judge that the AD input unit is normal, and controls the electric heater and restore normal heated condition.
Preferably, the control module is also used to:
When the difference of the first maximum temperature detected value and the first minimum temperature detected value be greater than the preset threshold or
When the timing time of the third timer is greater than third preset time, to first timer and the third timer into
Row is reset.
Preferably, the control module is also used to:
When the timing time of second timer is greater than the second preset time, to first timer and described the
Three timers are zeroed out.
Preferably, the control module is also used to:
When the electric heater is in heated condition, when controlling heating of first timer to the electric heater
Between carry out accumulative timing, and control the third timer and continuous timing carried out to the heating total time of the electric heater；When
When the electric heater is heated, second timer is zeroed out；When the electric heater is not heated, control
It makes second timer and continuous timing is carried out to the non-heating time of the electric heater.
The present invention provides a kind of fault recognition method of the AD input unit of electric heater, and the AD of the electric heater inputs dress
The fault recognition method set is the following steps are included: S10, carries out accumulative timing to the heating time of electric heater, and to the electricity
The heating total time of heater and the non-heating time of the electric heater carry out continuous timing respectively；S20, in accumulative timing
When heating time is greater than or equal to the non-heating time of the first preset time and continuous timing less than the second preset time, to described
Electric heater when heated in and non-heating time in the AD input unit output the first maximum temperature detected value and
First minimum temperature detected value is compared；S30, when the first maximum temperature detected value and first minimum temperature detect
The difference of value is less than or equal to preset threshold and when the heating total time being less than or equal to third preset time of continuous timing,
It controls the electric heater and stops heating；S40, when stopping heating time more than or equal to four preset times, to the electricity
The the second maximum temperature detected value and the second minimum temperature of AD input unit output of the heater in stopping heating time
Detected value is compared；S50, when the difference of the second maximum temperature detected value and the second minimum temperature detected value is less than or waits
When the preset threshold, the AD input unit failure is judged.Present invention greatly enhances the AD inputs to electric heater
The accuracy of the fault identification of device.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the flow diagram of the fault recognition method first embodiment of the AD input unit of electric heater of the present invention；
Fig. 2 is the flow diagram of the fault recognition method second embodiment of the AD input unit of electric heater of the present invention；
Fig. 3 is the flow diagram of the fault recognition method 3rd embodiment of the AD input unit of electric heater of the present invention；
Fig. 4 is the flow diagram of the fault recognition method fourth embodiment of the AD input unit of electric heater of the present invention；
Fig. 5 be electric heater of the present invention AD input unit fault recognition method described in electric heater temperature and when
Between corresponding relationship schematic diagram；
Fig. 6 is the functional block diagram of one embodiment of electric heater of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of fault recognition method of the AD input unit of electric heater, and the AD of the electric heater inputs dress
The fault recognition method set is mainly used in the fault identification and control system of electric heater, for the AD input to electric heater
Device carries out fault identification, to prevent from breaking down and cause the safety problem of electric heater due to AD input unit.This implementation
In example, the AD input unit of the electric heater includes detection module and AD conversion module, wherein detection module is for detecting institute
The running parameter (such as temperature) of electric heater is stated to generate detection signal, AD conversion module is set to the controller of electric heater
In, the detection signal for generating the detection module is converted into the digital signal that the controller of electric heater can identify.
In the present embodiment, the detection module in the AD input unit is temperature sensing circuit.
Referring to Fig.1, in one embodiment, the fault recognition method of the AD input unit of the electric heater includes following step
It is rapid:
S10 carries out accumulative timing, and heating total time and institute to the electric heater to the heating time of electric heater
The non-heating time for stating electric heater carries out continuous timing respectively；
S20 is greater than or equal to the non-heating time of the first preset time and continuous timing in the heating time of accumulative timing
It is defeated to the AD input unit in the electric heater when heated interior and non-heating time when less than the second preset time
The first maximum temperature detected value and the first minimum temperature detected value out is compared；
Specifically, in the present embodiment, when the electric heater is in heated condition, when to the heating of the electric heater
Between carry out accumulative timing, and continuous timing is carried out to the heating total time of the electric heater；When the electric heater is added
When hot, the non-heating time of the electric heater is zeroed out；When the electric heater is not heated, the electricity is added
The non-heating time of hot device carries out continuous timing.Specifically, as shown in figure 5, Fig. 5 is the AD input unit of electric heater of the present invention
Fault recognition method described in electric heater temperature and time corresponding relationship schematic diagram, at 0 moment, the electric heater
Into heated condition, and within 0 to t1 period, the electric heater is heated, then at 0 moment, is started to the electricity
The heating time ton of heater carries out accumulative timing (the heating time ton1=t1 in 0 to t1 period), and to the electricity
The heating total time of heater carries out continuous timing, while being zeroed out to the non-heating time toff of the electric heater；And
Within the period of t1 to t2, the electric heater is not heated, therefore, at the t1 moment, is started to the electric heater
Non- heating time toff carries out continuous timing, the non-heating time toff=t2-t1 of continuous timing；And in the period of t2 to t3
Interior, the electric heater is heated again, carries out timing, timing time ton2=to heating time ton2 of the period
T3-t2, then at the t3 moment, to the heating time ton=ton1+ton2=t1+ (t3- of the accumulative timing of the electric heater
t2).It is understood that and at the t3 moment, the heating total time of continuous timing is t3.In the present embodiment, if accumulative
The heating time ton of timing then next time when the electric heater is heated, continues to institute less than the first preset time t a
The heating time ton for stating electric heater carries out accumulative timing, as shown in figure 5, within the period of t4 to t5, the electric heater
Heating time ton3=t5-t4, similarly, within the period of t6 to t7, the heating time ton4=t7- of the electric heater
T6, therefore, at the t7 moment, to the heating time ton=ton1+ton2+ton3+ton4 of the accumulative timing of the electric heater
=t1+ (t3-t2)+(t5-t4)+(t7-t6), to the heating total time tz=t7 of the continuous timing of the electric heater.
In the present embodiment, when above-mentioned accumulative timing heating time ton be greater than or equal to the first preset time t a and
When the non-heating time toff of continuous timing is less than the second preset time t b, S20 is entered step.As shown in figure 5, in t1 to t2's
In period, the electric heater is not heated, and therefore, it is necessary to the non-heating time toff to the electric heater to connect
Continuous timing, toff=t2-t1.In the present embodiment, if the non-heating time toff of continuous timing is less than the second preset time t b
When, then when the electric heater is heated every time, require to carry out the non-heating time toff of the electric heater clear
Zero, as shown in figure 5, requiring to be zeroed out the non-heating time toff of the electric heater at t2, t4 and t6 moment, that is, exist
The electric heater does not heat next time when, need again continuously to count the non-heating time toff of the electric heater
When.As shown in figure 5, being required to not heating to the electric heater in the period of t3 to t4 and in the period of t5 to t6
Time toff carries out reclocking.
It is understood that the time range of above-mentioned first preset time t a and the second preset time t b can according to need
It is set.In the present embodiment, the time range of the first preset time t a is more than or equal to 4 minutes and to be less than or equal to
6 minutes, the time range of the second preset time t b was more than or equal to 60 minutes and to be less than or equal to 65 minutes.It is preferred that
Ground, in the present embodiment, the first preset time t a is 4 minutes, and the second preset time t b is 60 minutes.
In the present embodiment, it is greater than or equal to the first preset time t a and continuous timing in the heating time ton of accumulative timing
Non- heating time toff less than the second preset time t b when, to the electric heater when heated in and non-heating time in
The AD input unit output maximum temperature detected value and minimum temperature detected value be compared, in the present embodiment, at this time
The electric heater when heated in and non-heating time in the AD input unit output maximum temperature detected value and
Minimum temperature detected value is known as the first maximum temperature detected value and the first minimum temperature detected value.As shown in fig. 5, it is assumed that in t7
It carves, the heating time ton for adding up timing is greater than or equal to the first preset time t a, and the non-heating time toff of continuous timing is less than
Second preset time t b, therefore, the present embodiment the t7 moment to the AD input unit exported within the t7 time first most
Big temperature detection value and the first minimum temperature detected value are compared, wherein in the present embodiment, the first maximum temperature detection
Value is Tmax1, and the first minimum temperature detected value is Tmin1.It should be noted that above-mentioned Tmax1 and Tmin1 corresponds to
The digital signal that the AD input unit is exported.
S30, when the difference of the first maximum temperature detected value and the first minimum temperature detected value is less than or equal to
When the heating total time of preset threshold and continuous timing is less than or equal to third preset time, controls the electric heater and stop
Only heat；
S40, when stopping heating time more than or equal to four preset times, to the electric heater when stopping heating
The the second maximum temperature detected value and the second minimum temperature detected value of interior AD input unit output are compared；
S50, when the difference of the second maximum temperature detected value and the second minimum temperature detected value is less than or equal to described
When preset threshold, the AD input unit failure is judged.
Specifically, as shown in fig. 5, it is assumed that the first maximum temperature detected value of the output of AD input unit described in the t7 moment
The difference of Tmax1 and the first minimum temperature detected value Tmin1 be less than or equal to preset threshold T (i.e. Tmax1-Tmin1≤
T), and the t7 moment when heating total time tz being less than or equal to third preset time t c of continuous timing (tz≤
When tc), then it controls the electric heater and stops heating, and the stopping heating time tg of the electric heater is continuously counted
When.The present embodiment the stopping heating time tg be greater than or equal to the 4th preset time t d when (when tg >=td), to described
Electric heater stop heating during the AD input unit output maximum temperature detected value and minimum temperature detected value into
Row compares.In the present embodiment, the maximum temperature detection of the AD input unit output in the stopping heating time tg >=td
Value and minimum temperature detected value are known as the second maximum temperature detected value and the second minimum temperature detected value.As shown in fig. 5, it is assumed that t8
Moment, the stopping heating time tg >=td, the second maximum temperature detected value that the AD input unit exports at this time are
The second minimum temperature detected value of Tmax2, the AD input unit output are Tmin2.Then, according to the described second maximum temperature
The difference for spending detected value Tmax2 and the second minimum temperature detected value Tmin2 judges that the AD input unit whether there is failure,
I.e. the present embodiment is the stopping heating period in the electric heater, is examined according to the maximum temperature that the AD input unit is exported
Difference between measured value and minimum temperature detected value judges whether the AD input unit of the electric heater breaks down.Specifically
Ground, as shown in figure 5, if the second maximum temperature detected value Tmax2 described in the t8 moment and the second minimum temperature detected value Tmin2
Difference be less than or equal to the preset threshold T when (when Tmax2-Tmin2≤T), then judge that the AD of the electric heater is defeated
Enter plant failure, and issues alarm signal.
It is understood that the time of the range of above-mentioned preset threshold T, third preset time t c and the 4th preset time t d
Range, which can according to need, to be set.In the present embodiment, the range of the preset threshold T be more than or equal to 1 AD value and
Less than or equal to 2 A values, the time range of the third preset time t c are more than or equal to 20 minutes and to be less than or equal to 25
Minute, the time range of the 4th preset time t d is more than or equal to 25 minutes and to be less than or equal to 30 minutes.Preferably,
In the present embodiment, the preset threshold T is 1 AD value, and the third preset time t c is 20 minutes, the 4th preset time
Td is 25 minutes.
The fault recognition method of the AD input unit of the present embodiment electric heater, firstly, to the heating time of electric heater
Ton carries out accumulative timing, and the non-heating time toff of heating the total time tz and the electric heater to the electric heater
Continuous timing is carried out respectively；Then, the heating time ton of accumulative timing be greater than or equal to the first preset time t a (i.e. ton >=
Ta when) and the non-heating time toff of continuous timing is less than the second preset time t b (i.e. toff < tb), exist to the electric heater
The first maximum temperature detected value Tmax1 and first of AD input unit output in heating time and in non-heating time is most
Small temperature detection value Tmin1 is compared；When the first maximum temperature detected value Tmax1 and first minimum temperature are detected
The difference of value Tmin1 is less than or equal to heating total time tz of preset threshold (i.e. Tmax1-Tmin1≤T) and continuous timing
When less than or equal to third preset time (i.e. tz≤tc), controls the electric heater and stop heating, and to the electric heater
Stopping heating time tg carry out continuous timing；When the stopping heating time tg is greater than or equal to the 4th preset time t d
(i.e. when tg >=td), to the second maximum temperature of AD input unit output of the electric heater in stopping heating time
Detected value Tmax2 and the second minimum temperature detected value Tmin2 are compared；Finally, working as the second maximum temperature detected value
When the difference of Tmax2 and the second minimum temperature detected value Tmin2 are less than or equal to the preset threshold T (Tmax2-Tmin2≤
T), judge the AD input unit failure.The fault recognition method of the AD input unit of the present embodiment electric heater, due to be
The maximum temperature detected value Tmax2 and minimum temperature that the stopping heating period of electric heater is exported according to the AD input unit
Difference between detected value Tmin2 judges whether the AD input unit of the electric heater breaks down, relative to existing skill
The maximum temperature detected value and minimum temperature that heating period in electric heater in art is exported according to the AD input unit
Difference between detected value judges method that whether the AD input unit of the electric heater breaks down, avoid when electricity plus
The heating amount of hot device is smaller or after reaching boiling point, since the variable quantity of the temperature detection value of AD input unit output is smaller
Caused by judge problem by accident, so that the accuracy of the fault identification to the AD input unit of electric heater is improved, so that this implementation
Example can be effectively prevented due to the AD input unit of electric heater breaks down and caused by because of caused by continuous heating peace
Full problem, such as overheat on fire etc..
Further, referring to Fig. 2, the fault recognition method first of the AD input unit based on electric heater of the present invention is implemented
Example is also wrapped after above-mentioned steps S40 in the fault recognition method second embodiment of the AD input unit of electric heater of the present invention
It includes:
S60, when the difference of the second maximum temperature detected value and the second minimum temperature detected value is greater than the default threshold
When value, judge that the AD input unit is normal, and controls the electric heater and restore normal heated condition.
Specifically, as shown in figure 5, if the second maximum temperature detected value Tmax2 described in the t8 moment and the second minimum temperature
When spending the difference of detected value Tmin2 greater than the preset threshold T (when Tmax2-Tmin2 > T), then the AD input dress is judged
It sets normally, and controls the electric heater and restore normal heated condition.
The fault recognition method of the AD input unit of the present embodiment electric heater compared with the existing technology in electricity plus
The heating period of hot device is according between the AD input unit maximum temperature detected value exported and minimum temperature detected value
Difference judges method that whether the AD input unit of the electric heater breaks down, avoids the heating amount when electric heater
It is smaller or after reaching boiling point, the variable quantity of the temperature detection value exported as the AD input unit it is smaller and caused by judge by accident and ask
Topic, to improve the accuracy of the fault identification to the AD input unit of electric heater, enable the present embodiment effectively
Prevent that the AD input unit due to electric heater from breaking down and caused by because of caused by continuous heating safety problem, such as mistake
Heat is on fire etc..
Further, referring to Fig. 3, the fault recognition method second of the AD input unit based on electric heater of the present invention is implemented
Example, in the fault recognition method 3rd embodiment of the AD input unit of electric heater of the present invention, after the step S20
Further include:
S70, when the difference of the first maximum temperature detected value and the first minimum temperature detected value is greater than the default threshold
When the heating total time of value or continuous timing is greater than third preset time, heating time to accumulative timing and continuous
Timing is zeroed out the heating total time.
Specifically, as shown in fig. 5, it is assumed that the first maximum temperature detected value Tmax1 described in the t7 moment and first minimum
Difference Tmax1-Tmin1 > T of temperature detection value Tmin1, or heating total time tz of continuous timing are default greater than third
When time tc, then being zeroed out heating total time tz to the heating time ton of accumulative timing and continuous timing,
Meanwhile the first maximum temperature detected value Tmax1 and the first minimum temperature detected value Tmin1 are zeroed out, it goes forward side by side
Enter the timing of next circulation.
The fault recognition method of the AD input unit of the present embodiment electric heater compared with the existing technology in electricity plus
The heating period of hot device is according between the AD input unit maximum temperature detected value exported and minimum temperature detected value
Difference judges method that whether the AD input unit of the electric heater breaks down, avoids the heating amount when electric heater
It is smaller or after reaching boiling point, the variable quantity of the temperature detection value exported as the AD input unit it is smaller and caused by judge by accident and ask
Topic, to improve the accuracy of the fault identification to the AD input unit of electric heater, enable the present embodiment effectively
Prevent that the AD input unit due to electric heater from breaking down and caused by because of caused by continuous heating safety problem, such as mistake
Heat is on fire etc..
Further, referring to Fig. 4, the fault recognition method third of the AD input unit based on electric heater of the present invention is implemented
Example, in the fault recognition method fourth embodiment of the AD input unit of electric heater of the present invention, after the step S10
Further include:
S80, when the non-heating time described in the continuous timing is greater than or equal to the second preset time, to the institute of accumulative timing
State being zeroed out the heating total time for heating time and continuous timing.
Specifically, in the present embodiment, the non-heating time toff described in the continuous timing be greater than or equal to second it is default when
Between tb when, i.e. when toff >=tb, heating total time tz of the heating time ton and continuous timing to accumulative timing into
Row is reset, and enters the timing of next circulation.
The fault recognition method of the AD input unit of the present embodiment electric heater compared with the existing technology in electricity plus
The heating period of hot device is according between the AD input unit maximum temperature detected value exported and minimum temperature detected value
Difference judges method that whether the AD input unit of the electric heater breaks down, avoids the heating amount when electric heater
It is smaller or after reaching boiling point, the variable quantity of the temperature detection value exported as the AD input unit it is smaller and caused by judge by accident and ask
Topic, to improve the accuracy of the fault identification to the AD input unit of electric heater, enable the present embodiment effectively
Prevent that the AD input unit due to electric heater from breaking down and caused by because of caused by continuous heating safety problem, such as mistake
Heat is on fire etc..
The present invention also provides a kind of electric heaters, and referring to Fig. 6, in one embodiment, which inputs including AD
Device 101 and controller 102.
Specifically, the AD input unit 101 is detected for the running parameter to the electric heater 100, and will
Temperature detection value is input to the controller 102.In the present embodiment, the AD input unit 101 includes 1011 He of detection module
AD conversion module 1012, wherein the detection module 1011 is used to detect the running parameter (such as temperature) of the electric heater 100
Signal is detected to generate, the AD conversion module 1012 is set in the controller 102 of the electric heater 100, and the AD turns
Mold changing block 1012 is used to for the detection signal that the detection module 1011 generates being converted into the controller of the electric heater 100
102 digital signals that can be identified.
In the present embodiment, the controller 102 includes the first timer 1021, the second timer 1022, third timer
1023, the 4th timer 1024, data processing module 1025, control module 1026 and judgment module 1027.
Specifically, first timer 1021 adds up for the heating time ton to the electric heater 100
Timing；
Second timer 1022 carries out continuous timing for the non-heating time toff to the electric heater 100；
The third timer 1023 carries out continuous timing for the heating total time tz to the electric heater 100；
4th timer 1024 carries out continuous timing for the stopping heating time tg to the electric heater 100；
The data processing module 1025, for being greater than or equal in the timing time ton of first timer 1021
When the timing time toff of first preset time t a and second timer 1022 is less than the second preset time t b, to the electricity
Interior the first maximum temperature detection with the AD input unit 101 output in non-heating time when heated of heater 100
Value Tmax1 and the first minimum temperature detected value Tmin1 are compared；And the timing time tg in the 4th timer 1024
When more than or equal to the 4th preset time t d, to the AD input unit of the electric heater 100 in stopping heating time
The the second maximum temperature detected value Tmax2 and the second minimum temperature detected value Tmin2 of 101 outputs are compared；
The control module 1026, for when the first maximum temperature detected value Tmax1 and first minimum temperature
The difference of detected value Tmin1 is less than or equal to preset threshold T and the timing time tz of the third timer 1023 is less than or waits
When third preset time t c, controls the electric heater 100 and stop heating；
The judgment module 1027 inputs dress for the AD stopped in heating time when the electric heater 100
The difference for setting the second maximum temperature detected value Tmax2 and the second minimum temperature detected value Tmin2 of 101 outputs is less than or equal to institute
When stating preset threshold T (i.e. when Tmax2-Tmin2≤T), judge that there are failures for the AD input unit 101.
In the present embodiment, the electric heater 100 further includes warning device (not shown), and the warning device is for working as institute
When stating judgment module 1027 and determining the AD input unit 101 and break down, alarm signal is issued.
Specifically, in the present embodiment, when the electric heater 100 is in heated condition, first timer 1021
Accumulative timing is carried out to the heating time ton of the electric heater 100, the third timer 1023 is to the electric heater
100 heating total time tz carries out continuous timing；When the electric heater 100 is heated, the control module 1026 is right
The timing time toff of second timer 1022 is zeroed out；When the electric heater 100 is not heated, described
Two timers 1022 carry out continuous timing to the non-heating time toff of the electric heater 100.Specifically, as shown in figure 5,
0 moment, the electric heater 100 enter heated condition, and within 0 to t1 period, the electric heater 100 is added
Heat, then at 0 moment, first timer 1021 starts to carry out the heating time ton of the electric heater 100 accumulative timing
When (the heating time ton1=t1 in time period), the third timer 1023 are total to the heating of the electric heater 100
Between tz carry out continuous timing, meanwhile, the control module 1026 carries out the timing time toff of second timer 1022
It resets, i.e., to second timer 1022 institute, continuously the non-heating time toff of timing is zeroed out；And t1 to t2 when
Between in section, the electric heater 100 is not heated, and therefore, at the t1 moment, second timer 1022 starts to the electricity
The non-heating time toff of heater 100 carries out continuous timing, and continuously timing is not heated for the institute of second timer 1022
Time toff=t2-t1；And within the period of t2 to t3, the electric heater 100 is heated again, first timing
Device 1021 needs to carry out accumulation timing to the heating time ton of the period, and the heating time ton2=t3- of time period
T2, therefore, at the t3 moment, heating time ton of first timer 1021 to the accumulative timing of the electric heater 100
=ton1+ton2=t1+ (t3-t2).It is understood that and in t3 moment, the continuous timing of 1023 institutes of third timer
The heating total time be t3.In the present embodiment, if the heating time ton of the added up timing of first timer 1021
Less than the first preset time t a, then when the electric heater 100 is heated next time, first timer 1021 continues
Accumulative timing is carried out to the heating time ton of the electric heater 100, as shown in figure 5, within the period of t4 to t5, it is described
The heating time ton3=t5-t4 of electric heater 100, similarly, within the period of t6 to t7, the electric heater 100 adds
Hot time ton4=t7-t6, therefore, at the t7 moment, the heating time ton=of the added up timing of first timer 1021
Ton1+ton2+ton3+ton4=t1+ (t3-t2)+(t5-t4)+(t7-t6), the continuous timing of 1023 institutes of third timer
Heating total time tz=t7.
In the present embodiment, when the heating time ton of the added up timing of first timer 1021 is more than or equal to described
First preset time t a and second timer 1022 continuous timing non-heating time toff less than the second preset time
When tb, the data processing module 1025 is to the AD in the electric heater 100 when heated interior and non-heating time
The the first maximum temperature detected value Tmax1 and the first minimum temperature detected value Tmin1 that input unit 101 exports are compared.Such as
Shown in Fig. 5, within the period of t1 to t2, the electric heater 100 is not heated, therefore, second timer 1022
It needs to carry out continuous timing, in the period, second timer to the non-heating time toff of the electric heater 100
1022 continuous timing non-heating time toff=t2-t1.In the present embodiment, if second timer, 1022 institute is continuous
When the non-heating time toff of timing is less than the second preset time t b, then when the electric heater 100 is heated every time, institute
It states control module 1026 to require to be zeroed out the timing time of second timer 1022, as shown in figure 5, in t2, t4
And control module 1026 described in the t6 moment requires to be zeroed out the timing time of second timer 1022, i.e., described
Electric heater 100 does not heat next time when, second timer 1022 needs not heating to the electric heater 100 again
Time toff carries out continuous timing.As shown in figure 5, in the period of t3 to t4 and in the period of t5 to t6, second meter
When device 1022 be required to carry out reclocking to the non-heating time toff of the electric heater 100.
It is understood that the time range of above-mentioned first preset time t a and the second preset time t b can according to need
It is set.In the present embodiment, the time range of the first preset time t a is more than or equal to 4 minutes and to be less than or equal to
6 minutes, the time range of the second preset time t b was more than or equal to 60 minutes and to be less than or equal to 65 minutes.It is preferred that
Ground, in the present embodiment, the first preset time t a is 4 minutes, and the second preset time t b is 60 minutes.
In the present embodiment, it is greater than or equal to first in the heating time ton of the added up timing of first timer 1021
Preset time t a and second timer 1022 continuous timing non-heating time toff less than the second preset time t b when,
The data processing module 1025 inputs dress to the AD in the electric heater 100 when heated interior and non-heating time
The maximum temperature detected value and minimum temperature detected value for setting 101 outputs are compared, in the present embodiment, the AD input unit
The 101 maximum temperature detected values exported at this time and minimum temperature detected value are known as the first maximum temperature detected value and the first minimum temperature
Spend detected value.As shown in fig. 5, it is assumed that the heating time ton of the added up timing of first timer 1021 is greater than at the t7 moment
Or it is equal to the first preset time t a, the non-heating time toff of the continuous timing of second timer 1022 institute is preset less than second
Time tb, therefore, the present embodiment is at the t7 moment, and the data processing module 1025 is to the AD input unit 101 in the t7 time
Interior exported the first maximum temperature detected value and the first minimum temperature detected value are compared, wherein described in the present embodiment
First maximum temperature detected value is Tmax1, and the first minimum temperature detected value is Tmin1.It should be noted that above-mentioned
Tmax1 and Tmin1 is the digital signal that the AD conversion module 1012 corresponded in the AD input unit 101 is exported.
As shown in fig. 5, it is assumed that the first maximum temperature detected value Tmax1 and the first minimum temperature detected value
The difference of Tmin1 is less than or equal to preset threshold T (i.e. Tmax1-Tmin1≤T), and the third timer described in the t7 moment
1023 when heating total time tz being less than or equal to third preset time t c (when tz≤tc) of continuous timing, then it is described
Control module 1026 controls the electric heater 100 and stops heating, meanwhile, the 4th timer 1024 is to the electric heater
100 stopping heating time tg carries out continuous timing.The present embodiment is greater than or equal to the 4th in advance in the stopping heating time tg
If when time td (when tg >=td), by the data processing module 1025 to the electric heater 100 stop heating during
The AD input unit 101 output maximum temperature detected value and minimum temperature detected value be compared.In the present embodiment,
When the stopping heating time tg >=td, the maximum temperature detected value and minimum temperature that the AD input unit 101 exports are detected
Value is known as the second maximum temperature detected value and the second minimum temperature detected value.As shown in fig. 5, it is assumed that the t8 moment, described to stop adding
When hot time tg >=td, the second maximum temperature detected value is Tmax2, and the second minimum temperature detected value is Tmin2.So
Afterwards, the judgment module 1027 is according to the second maximum temperature detected value Tmax2's and the second minimum temperature detected value Tmin2
Difference judges the AD input unit 101 with the presence or absence of failure, i.e., the present embodiment is added in the stopping of the electric heater 101
The hot stage, according to the difference between the maximum temperature detected value exported of AD input unit 101 and minimum temperature detected value
To judge whether the AD input unit 101 of the electric heater 100 breaks down.
Specifically, as shown in figure 5, if the second maximum temperature detected value Tmax2 described in the t8 moment and second minimum
When the difference of temperature detection value Tmin2 is less than or equal to the preset threshold T (when Tmax2-Tmin2≤T), then the judgement
Module 1027 judges the AD input unit failure of the electric heater, and issues alarm signal by the warning device.
It is understood that the time of the range of above-mentioned preset threshold T, third preset time t c and the 4th preset time t d
Range, which can according to need, to be set.In the present embodiment, the range of the preset threshold T be more than or equal to 1 AD value and
Less than or equal to 2 A values, the time range of the third preset time t c are more than or equal to 20 minutes and to be less than or equal to 25
Minute, the time range of the 4th preset time t d is more than or equal to 25 minutes and to be less than or equal to 30 minutes.Preferably,
In the present embodiment, the preset threshold T is 1 AD value, and the third preset time t c is 20 minutes, the 4th preset time
Td is 25 minutes.
Further, in this embodiment the judgment module 1027 is also used to:
When the difference of the second maximum temperature detected value Tmax2 and the second minimum temperature detected value Tmin2 are greater than
When the preset threshold T, i.e. when Tmax2-Tmin2 > T, the judgment module 1027 judges that the AD input unit 101 is normal,
And the electric heater 100 is controlled by the control module 1026 and restores normal heated condition.
Specifically, as shown in figure 5, if second maximum temperature inspection of the output of the AD input unit 101 described in the t8 moment
(the Tmax2-Tmin2 when difference of measured value Tmax2 and the second minimum temperature detected value Tmin2 is greater than the preset threshold T
When > T), then the judgment module 1027 judges that the AD input unit 101 is normal, and controls institute by the control module 1026
It states electric heater 100 and restores normal heated condition.
Further, in this embodiment the control module 1026 is also used to:
When the difference of the first maximum temperature detected value and the first minimum temperature detected value be greater than the preset threshold or
When the timing time of the third timer is greater than third preset time, to first timer and the third timer into
Row is reset.
Specifically, as shown in fig. 5, it is assumed that first maximum temperature of the output of the AD input unit 101 described in the t7 moment
Difference Tmax1-Tmin1 > T of detected value Tmax1 and the first minimum temperature detected value Tmin1 or the third timing
Device 1023 when heating total time tz being greater than third preset time t c of continuous timing, then 1026 pairs of institutes of the control module
State the added up timing of the first timer 1021 the heating time ton and to the third timer 1023 continuous timing
Heating total time tz is zeroed out, meanwhile, to the first maximum temperature detected value Tmax1 and the first minimum temperature
Degree detected value Tmin1 is zeroed out, and controls first timer 1021, second timer 1022 and the third meter
When device 1023 enter the timing of next circulation.
Further, in this embodiment the control module 1026 is also used to:
When the timing time of second timer 1022 is greater than the second preset time t b, to first timer
1021 and the third timer 1023 be zeroed out.Specifically, when second timer 1022 described in continuous timing
When non-heating time toff is greater than or equal to the second preset time t b, i.e. when toff >=tb, the control module 1026 is to described
The heating time ton of the added up timing of first timer 1021 and to the third timer 1023 continuous timing institute
It states heating total time tz to be zeroed out, and controls first timer 1021, second timer 1022 and the third
Timer 1023 enters the timing of next circulation.
The present embodiment electric heater, firstly, the first timer 1021 in the controller 102 is to the electric heater
100 heating time ton carries out accumulative timing, heating total time of the third timer 1023 to the electric heater 100
Tz carries out continuous timing, and second timer 1022 connects the non-heating time toff of the electric heater 100 respectively
Continuous timing；Then, it is greater than or equal to the first preset time in the heating time ton of the added up timing of first timer 1021
Ta (i.e. ton >=ta) and second timer 1022 continuous timing non-heating time toff less than the second preset time t b
When (i.e. toff < tb), the data processing module 1025 is in the electric heater 100 when heated interior and non-heating time
The AD input unit 101 output the first maximum temperature detected value Tmax1 and the first minimum temperature detected value Tmin1 carry out
Compare；When the difference of the first maximum temperature detected value Tmax1 and the first minimum temperature detected value Tmin1 is less than or waits
In preset threshold (i.e. Tmax1-Tmin1≤T) and the third timer 1023 continuous timing heating total time tz
When less than or equal to third preset time (i.e. tz≤tc), the control module 1026 controls the electric heater and stops heating,
And the 4th timer 1024 carries out continuous timing to the stopping heating time tg of the electric heater 100；Stop described
When only heating time tg is greater than or equal to the 4th preset time t d (when tg >=td), the data processing module 1025 is to described
Electric heater 100 stop heating time in the AD input unit 101 output the second maximum temperature detected value Tmax2 and
Second minimum temperature detected value Tmin2 is compared；Finally, when the second maximum temperature detected value Tmax2 and second is minimum
When the difference of temperature detection value Tmin2 is less than or equal to the preset threshold T, the judgment module 1027 judges the AD input
Plant failure.The present embodiment is the maximum temperature exported in the stopping heating period of electric heater according to the AD input unit
Difference between detected value and minimum temperature detected value judges whether the AD input unit of the electric heater breaks down, phase
The maximum temperature detected value exported for the heating period in the prior art in electric heater according to the AD input unit
Difference between minimum temperature detected value judges method that whether the AD input unit of the electric heater breaks down, keeps away
Exempt from after the heating amount of electric heater is smaller or reaches boiling point, due to the change of the temperature detection value of AD input unit output
Change amount it is smaller and caused by judge problem by accident, to improve the accuracy of the fault identification to the AD input unit of electric heater,
Enable the present embodiment be effectively prevented as the AD input unit of electric heater breaks down and caused by because of continuous heating
Caused by safety problem, such as overheat on fire etc..
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of fault recognition method of the AD input unit of electric heater, which is characterized in that the AD of the electric heater is inputted
The fault recognition method of device the following steps are included:
S10 carries out accumulative timing, and heating total time and the electricity to the electric heater to the heating time of electric heater
The non-heating time of heater carries out continuous timing respectively；
S20 is less than in the non-heating time that the heating time of accumulative timing is greater than or equal to the first preset time and continuous timing
When the second preset time, to the AD input unit output in the electric heater when heated interior and non-heating time
First maximum temperature detected value and the first minimum temperature detected value are compared；
S30 is preset when the difference of the first maximum temperature detected value and the first minimum temperature detected value is less than or equal to
When the heating total time of threshold value and continuous timing is less than or equal to third preset time, controls the electric heater and stop adding
Heat；
S40, when stopping heating time more than or equal to four preset times, to the electric heater in stopping heating time
The AD input unit output the second maximum temperature detected value and the second minimum temperature detected value be compared；
S50, when the difference of the second maximum temperature detected value and the second minimum temperature detected value is less than or equal to described preset
When threshold value, the AD input unit failure is judged.
2. the fault recognition method of the AD input unit of electric heater as described in claim 1, which is characterized in that the step
After S40 further include:
S60, when the difference of the second maximum temperature detected value and the second minimum temperature detected value is greater than the preset threshold,
Judge that the AD input unit is normal, and controls the electric heater and restore normal heated condition.
3. the fault recognition method of the AD input unit of electric heater as claimed in claim 2, which is characterized in that the step
After S20 further include:
S70, when the difference of the first maximum temperature detected value and the first minimum temperature detected value be greater than the preset threshold, or
When the heating total time of continuous timing is greater than third preset time, the heating time and continuous timing to accumulative timing
Be zeroed out the heating total time.
4. the fault recognition method of the AD input unit of electric heater as claimed any one in claims 1 to 3, feature exist
In after the step S10 further include:
S80, when the non-heating time described in the continuous timing is greater than or equal to the second preset time, to described in accumulative timing plus
Hot time and continuous timing are zeroed out the heating total time.
5. the fault recognition method of the AD input unit of electric heater as described in any of claims 1, which is characterized in that
The step S10 specifically:
When the electric heater is in heated condition, accumulative timing is carried out to the heating time of the electric heater, and to institute
The heating total time for stating electric heater carries out continuous timing；When the electric heater is heated, to the electric heater
Non- heating time is zeroed out；When the electric heater is not heated, the non-heating time of the electric heater is carried out
Continuous timing.
6. a kind of electric heater, which is characterized in that the electric heater includes AD input unit and controller, the controller packet
It includes the first timer, the second timer, third timer, the 4th timer, data processing module, control module and judges mould
Block；Wherein:
The AD input unit, is detected, and temperature detection value is input to for the running parameter to the electric heater
The controller；
First timer carries out accumulative timing for the heating time to electric heater；
Second timer carries out continuous timing for the non-heating time to electric heater；
The third timer carries out continuous timing for the heating total time to electric heater；
4th timer carries out continuous timing for the stopping heating time to the electric heater；
The data processing module is greater than or equal to the first preset time and institute for the timing time in first timer
When stating the timing time of the second timer less than the second preset time, to the electric heater when heated in and when not heating
The the first maximum temperature detected value and the first minimum temperature detected value of interior AD input unit output are compared；And
When the timing time of the 4th timer is greater than or equal to four preset times, to the electric heater when stopping heating
The the second maximum temperature detected value and the second minimum temperature detected value of interior AD input unit output are compared；
The control module is small for the difference when the first maximum temperature detected value and the first minimum temperature detected value
When the timing time of preset threshold and the third timer is less than or equal to third preset time, the electricity is controlled
Heater stops heating；
The judgment module, be less than for the difference when the second maximum temperature detected value and the second minimum temperature detected value or
When equal to the preset threshold, the AD input unit failure is judged.
7. electric heater as claimed in claim 6, which is characterized in that the judgment module is also used to:
When the difference of the second maximum temperature detected value and the second minimum temperature detected value is greater than the preset threshold, judgement
The AD input unit is normal, and controls the electric heater and restore normal heated condition.
8. electric heater as claimed in claim 7, which is characterized in that the control module is also used to:
When the difference of the first maximum temperature detected value and the first minimum temperature detected value is greater than the preset threshold or described
When the timing time of third timer is greater than third preset time, first timer and the third timer are carried out clear
Zero.
9. the electric heater as described in any one of claim 6 to 8, which is characterized in that the control module is also used to:
When the timing time of second timer is greater than the second preset time, to first timer and the third meter
When device be zeroed out.
10. electric heater as claimed in claim 6, which is characterized in that the control module is also used to:
When the electric heater is in heated condition, control first timer to heating time of the electric heater into
The accumulative timing of row, and control the third timer and continuous timing is carried out to the heating total time of the electric heater；When described
When electric heater is heated, second timer is zeroed out；When the electric heater is not heated, institute is controlled
It states the second timer and continuous timing is carried out to the non-heating time of the electric heater.
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