CN108180595B - A kind of electric heater guard method, device and air-conditioning - Google Patents
A kind of electric heater guard method, device and air-conditioning Download PDFInfo
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- CN108180595B CN108180595B CN201711221573.7A CN201711221573A CN108180595B CN 108180595 B CN108180595 B CN 108180595B CN 201711221573 A CN201711221573 A CN 201711221573A CN 108180595 B CN108180595 B CN 108180595B
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- electric heater
- dry combustion
- combustion method
- occurs
- time threshold
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
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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
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/34—Heater, e.g. gas burner, electric air heater
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
- Air Conditioning Control Device (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The present invention provides a kind of electric heater guard method, device and air-conditioning; the device includes leaving air temp acquisition unit and control unit; the leaving air temp acquisition unit is used to acquire leaving air temp of the affiliated air-conditioning of the electric heater in heating mode operation; described control unit is used to determine whether the electric heater occurs dry combustion method according to the leaving air temp; if electric heater dry combustion method occurs, the inner blower for controlling the air-conditioning works according to predetermined state.The present invention improves electric heater reliability, reduces electric heater dry combustion method control cost.
Description
Technical field
The present invention relates to circuit field more particularly to a kind of electric heater guard method, device and there is the electric heater
The air-conditioning of protective device.
Background technique
Currently, the household electrical appliance such as air-conditioning, humidifier, electric heater generally use the electric heater with auxiliary heating function to carry out
Heating, under normal circumstances, the auxiliary electrical heater PTC control of air-conditioner set use open loop control mode.But when the abnormal feelings of appearance
When condition, air-conditioning can not judge electric heating switch state, and PTC dry combustion method easily leads to the raising of adjacent material temperature, may cause household electric
Device complete machine overheating deforming will lead to such as sponge material spontaneous combustion and cause fire safety accident when serious.As for a long time in dry-fire condition
Lower work, it is also possible to the short circuit phenomenon that PTC accelerates decaying, failure of insulation and the breakdown of PTC piece to generate occur.
For the control method using auxiliary electrical heater anti-dry, there are many thinkings, such as CN105357780A to be examined by electric current
Survey, CN102954556B by voltage detecting, CN201697275U then by temperature limiter and major loop fuse collective effect come
Judgement.But the current or voltage that air-conditioning PTC is detected by circuit needs additional circuit, increases controller cost；And for
Air-conditioning equipment on electric bus is set, and since air-conditioning work voltage is high (DC450V or more), there is presently no maturations for producer
High votage fuse, and the new fuse development cycle is also long.
Summary of the invention
In view of this, coming the object of the present invention is to provide a kind of electric heater protection circuit of low cost and guard method
PTC dry-fire condition is avoided the occurrence of, air-conditioning safety in utilization is enhanced.
According to the first aspect of the invention, a kind of electric heater protective device is provided characterized by comprising go out wind-warm syndrome
Spend acquisition unit and control unit；Wherein, the leaving air temp acquisition unit exists for acquiring the affiliated air-conditioning of the electric heater
Leaving air temp when heating mode is run；Described control unit is used to whether determine the electric heater according to the leaving air temp
Dry combustion method occurs, if electric heater dry combustion method occurs, the inner blower for controlling the air-conditioning works according to predetermined state.
Further, further includes: electric heater temperature alarming unit, the electric heater temperature alarming unit is for detecting
Electric heater temperature, if the electric heater temperature detected is greater than electric heater temperature alarming threshold value, electric heater temperature report
Alert unit report failure；Described control unit, be further used for be according to the leaving air temp and electric heater temperature alarming unit
No report failure determines whether the electric heater occurs dry combustion method.
Further, further includes: first contactor switch is connect with the first end of electric heater；Second contactor switch,
It is connect with the second end of electric heater.
Further, described control unit determines whether the electric heater occurs dry combustion method, comprising: disconnects first contactor
Switch；Close electric heater；When judging that the first interval time begun to pass through from closing electric heater is greater than the first of a setting
Between threshold value when, whether electric heater temperature alarming unit reports failure, if so, judgement occur electric heater dry combustion method, and determine institute
State first contactor switch fault.
Further, described control unit determines whether the electric heater occurs dry combustion method, further includes: the judgement first
Interval time be greater than first time threshold when electric heater temperature alarming unit whether report failure, if result be it is no, judgement is worked as
From judge when the first interval time be greater than first time threshold when electric heater temperature alarming unit whether failure is reported to begin to pass through
The second interval time when being greater than the second time threshold of a setting, the leaving air temp of leaving air temp acquisition unit detection is
No the first temperature threshold for being greater than a setting, if it is, electric heater dry combustion method, and first contactor switch event occur for judgement
Barrier.
Further, described control unit determines whether the electric heater occurs dry combustion method, further includes: the judgement is when the
Whether the leaving air temp that two interval times, the leaving air temp acquisition unit detected when being greater than second time threshold is greater than one first
Temperature threshold, if result is no, execution operations described below: closing inner blower；Judgement is begun to pass through when self closing inner blower
When third interval time is greater than the third time threshold of a setting, whether the leaving air temp of the leaving air temp acquisition unit detection
Greater than the second temperature threshold value of a setting；If so, electric heater dry combustion method, and first contactor switch fault occur for judgement；Such as
Fruit is no, judges that electric heater normal switching-off occurs, and first contactor switch is normal.
Further, described control unit determines whether the electric heater occurs dry combustion method, further includes: if it is determined that occurring
Electric heater dry combustion method, and first contactor switch fault further execute operations described below: disconnecting second contactor switch；Judgement
When from when disconnecting the 4th interval time for beginning to pass through of second contactor and being greater than four time threshold of a setting, it is described out
Whether the leaving air temp of air temperature acquisition unit detection is greater than the third temperature threshold of a setting；Add if so, electricity occurs for judgement
Hot device dry combustion method, and first contactor switch, second contactor switch fault；If not, judgement generation electric heater dry combustion method, first
Contactless contactor failure, and second contactor switch is normal.
Further, described control unit determines whether the electric heater occurs dry combustion method, further includes: adds in case of electricity
Hot device dry combustion method, the first, second contactless contactor failure, control unit control inner blower and are in first state when standby；With/
Or, in case of electric heater dry combustion method, first contactor switch fault, second contactor switch is normal, in control unit control
Blower is in the second state when standby；And/or if electric heater normal switching-off, and first contactor switch is normal, control
Unit controls inner blower and is in the third state when standby.
Further, inner blower is opened according to middle wind file when the first state；And/or interior wind when second state
Organ closes；And/or inner blower is closed when the third state.
Further, the value range of electric heater temperature alarming threshold value is 150-250 DEG C.
Further, the value range of first time threshold is 1 to 10 minutes；And/or the value model of second time threshold
Enclose is 1 to 10 minutes；And/or the value range of third time threshold is 1 to 10 minutes；And/or the 4th time threshold take
Being worth range is 5 to 10 minutes；And/or first temperature threshold value range be 50-70 DEG C；And/or second time threshold
Value range is 50-70 DEG C；And/or the value range of third time threshold is 50-70 DEG C.
It further, further include fault cues unit, for controlling when control unit judges to occur electric heater dry combustion method
Prompt is issued under the control of unit processed.
Further, the fault cues unit is selected from one of display unit, loudspeaker, indicator light or a variety of, leads to
The form for crossing text, image, voice, buzzing, and/or flashing lamp issues prompt.
According to the second aspect of the invention, a kind of electric heater guard method is provided, which is characterized in that including following steps
It is rapid: to acquire leaving air temp of the affiliated air-conditioning of the electric heater in heating mode operation；Institute is determined according to the leaving air temp
It states whether electric heater occurs dry combustion method, if electric heater dry combustion method occurs, controls the inner blower of the air-conditioning according to predetermined state
Work.
Further, further include following step: detection electric heater temperature, if the electric heater temperature detected is greater than
Electric heater temperature alarming threshold value uses electric heater temperature alarming unit report failure；According to the leaving air temp and electric heating
Whether device temperature alarming unit reports failure to determine whether the electric heater occurs dry combustion method.
Further, further include following step: first contactor being switched and is connect with the first end of electric heater；By second
The connection of the second end of contactless contactor and electric heater.
Further, whether the determination electric heater occurs dry combustion method, specifically: disconnect first contactor switch；
Close electric heater；Judge that the first interval time begun to pass through from closing electric heater is greater than the first time threshold of a setting
When, whether electric heater temperature alarming unit reports failure, if so, electric heater dry combustion method occurs for judgement, and determines described first
Contactless contactor failure.
Further, whether the determination electric heater occurs dry combustion method, further includes following step: the judgement first
Interval time be greater than first time threshold when electric heater temperature alarming unit whether report failure, if result be it is no, judgement is worked as
From judge when the first interval time be greater than first time threshold when electric heater temperature alarming unit whether failure is reported to begin to pass through
The second interval time be greater than one setting second time threshold when, whether leaving air temp is greater than the first temperature threshold of a setting
Value, if it is, electric heater dry combustion method, and first contactor switch fault occur for judgement.
Further, whether the determination electric heater occurs dry combustion method, further includes following step: the judgement is when the
Whether leaving air temp is greater than one first temperature threshold when two interval times were greater than second time threshold, if result is no, execution
Operations described below: inner blower is closed；Judgement acts that third interval time for beginning to pass through is greater than a setting when self closing inner blower
When three time thresholds, whether leaving air temp is greater than the second temperature threshold value of a setting；It is done if so, electric heater occurs for judgement
It burns, and first contactor switch fault；If not, electric heater normal switching-off occurs for judgement, and first contactor switch is normal.
Further, whether the determination electric heater occurs dry combustion method, further includes following step: if it is determined that occurring
Electric heater dry combustion method, and first contactor switch fault further execute operations described below: disconnecting second contactor switch；Judgement
When from when disconnecting the 4th interval time for beginning to pass through of second contactor and being greater than four time threshold that one sets, wind-warm syndrome out
Whether degree is greater than the third temperature threshold of a setting；If so, judgement generation electric heater dry combustion method, and first contactor switch,
Second contactor switch fault；If not, electric heater dry combustion method, first contactor switch fault, and the second contact occur for judgement
Device switch is normal.
Further, whether the determination electric heater occurs dry combustion method, further includes: dry in case of electric heater
It burns, the first, second contactless contactor failure, controls inner blower and be in first state when standby；And/or add in case of electricity
Hot device dry combustion method, first contactor switch fault, second contactor switch is normal, controls inner blower and is in the second shape when standby
State；And/or if electric heater normal switching-off, and first contactor switch is normal, controls inner blower and is in third when standby
State.
Further, inner blower is opened according to middle wind file when the first state；And/or interior wind when second state
Organ closes；And/or inner blower is closed when the third state.
Further, the value range of electric heater temperature alarming threshold value is 150-250 DEG C.
Further, the value range of first time threshold is 1 to 10 minutes；And/or the value model of second time threshold
Enclose is 1 to 10 minutes；And/or the value range of third time threshold is 1 to 10 minutes；And/or the 4th time threshold take
Being worth range is 5 to 10 minutes；And/or first temperature threshold value range be 50-70 DEG C；And/or second time threshold
Value range is 50-70 DEG C；And/or the value range of third time threshold is 50-70 DEG C.
Further, it when electric heater dry combustion method occurs, is issued and is prompted by fault cues unit.
Further, the fault cues unit is selected from one of display unit, loudspeaker, indicator light or a variety of, leads to
The form for crossing text, image, voice, buzzing, and/or flashing lamp issues prompt.
According to the third aspect of the invention we, a kind of air-conditioning is provided, comprising: electric heater；Inner blower；Electric heater protection dress
It sets, the electric heater protective device is electric heater protective device above-mentioned.
According to the fourth aspect of the invention, a kind of computer readable storage medium is provided, which is characterized in that be stored thereon with
Computer program, when described program is executed by processor the step of realization preceding method.
According to the fifth aspect of the invention, a kind of air-conditioning is provided, which is characterized in that including processor, memory and deposit
The computer program that can be run on a processor on a memory is stored up, the processor realizes preceding method when executing described program
The step of.
The present invention through the above scheme, judge PTC whether dry combustion method, judge PTC contactor whether adhesion, and pass through interior wind
Machine controls to avoid PTC dry combustion method, on the one hand improves PTC reliability, effectively avoids the occurrence of PTC dry-fire condition, and enhancing air-conditioning makes
With safety, anti-PTC dry combustion method control cost is on the other hand also effectively reduced.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is electric heater protection circuit according to an embodiment of the present invention.
Fig. 2 is the flow chart of electric heater guard method according to an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
Fig. 1 is electric heater protection circuit according to the present invention.In figure, appended drawing reference 1 is contactless contactor A, and 2 be contact
Device switch B, 3 be electric heater PTC1, and 4 be electric heater PTC2, and 5 be temperature limiter L1, and 6 be temperature limiter L2, and 7 be leaving air temp
T1,8 be leaving air temp T2.
The present embodiment provides a kind of PTC electric heater anti-dry to protect circuit.The protection circuit is used for the household electric of heating
In device (such as air-conditioning, warm-air drier), the PTC electric heater in the household electrical appliance can be judged in time with the presence or absence of dry combustion method, with timely
There is the PTC electric heater of dry combustion method failure in protection.
As shown in Figure 1, the anti-dry protection circuit includes two electric heaters PTC1, PTC2 in parallel, contactor is opened
A is closed, is connect with the first end of electric heater PTC1, PTC2, contactless contactor B, is connected with the second end of electric heater PTC1, PTC2
It connects.Temperature limiter L1 is installed in electric heater PTC1, temperature limiter L2 is installed on the surface PTC2, the temperature limiter L1 is for sensing
The temperature T3, the temperature limiter L2 of electric heater PTC1 is used to sense the temperature T4 of electric heater PTC2, and temperature limiter L1, L2 simultaneously will
Temperature T3, T4 sensed is sent to control unit (Fig. 1 is not shown), such as the MCU of air-conditioning.If it find that electric heater
The temperature of PTC1, and/or electric heater PTC2, i.e. T3 and/or T4 have been more than predetermined threshold, then temperature limiter report failure.Add in electricity
Near hot device PTC1 and electric heater PTC2, leaving air temp sensor (i.e. outlet air temperature sensing package) is also respectively provided with for check bit
In leaving air temp T1, T2 of electric heater PTC1, PTC2, the leaving air temp that the leaving air temp sensor respectively will test
T1, T2 send control unit to, are sent by control unit according to above-mentioned leaving air temp T1, T2, the temperature limiter L1, temperature limiter L2
Fault report information comprehensive descision electric heater PTC1, PTC2 whether extremely close and contactless contactor A, B whether glue
Even.The anti-dry protection circuit may also include fault cues unit, make the prompting of humidity sensor fault alarm.The alarm
Prompt can be that (display in this can be heating household electrical appliance, such as display unit on air-conditioner host, distant in display
Control device on display unit, be also possible to PTC anti-dry protection control device on display) on show dry combustion method fault message
(such as corresponding fault code), and/or the corresponding fault cues unit of control sound an alarm that (e.g., buzzer beeps, and dodges
Bright lamp issues flashing) etc. various sound, text, image, LED mode, dry combustion method failure is fed back to user in time, make user and
Shi Weixiu improves the safety and reliability of product.
Fig. 2 is PTC electric heater anti-dry guard method according to an embodiment of the present invention, by taking domestic air conditioning as an example, the party
Method includes the following steps:
S201 executes PTC out code, disconnects a contactless contactor in contactless contactor A, B.
The selection of contactless contactor A or B are disconnected in this step to this method itself and indistinction, only judge two contacts
Device switch whether adhesion sequence it is different.If this selection first disconnects contactless contactor A, receives electric heater closing next time and refer to
Contactless contactor B is first disconnected after order.In the present embodiment, selection first disconnects contactless contactor A.
S202, heating shutdown.
After heating shutdown, start to judge electric heater PTC1, PTC2 with the presence or absence of dry combustion method, whether contactless contactor A, B glue
Even, and according to judging result inner blower is controlled to avoid PTC dry combustion method.Specifically:
S203, being arranged from the time that electric heater PTC1, PTC2 are begun to pass through is closed is Time1, judges to be greater than as Time1
When one first time threshold n1, whether temperature limiter L1, and/or temperature limiter L2 report failure, if so, executing step S204.Wherein,
When the temperature of the temperature limiter L1, and/or temperature limiter L2 the electric heater PTC1 detected, and/or electric heater PTC2 are more than
When scheduled temperature limiter threshold value, then temperature limiter reports PTC failure.
S204, control unit judge that electric heater PTC1 and/or PTC2 are closed extremely, contactor is opened according to above- mentioned information
Close A adhesion.Contactless contactor B is further disconnected, step S205 is then executed.
S205, being arranged from the time that contactless contactor B is begun to pass through is disconnected is Time4, when judging that Time4 is greater than the one the 4th
Between threshold value n4 when, whether leaving air temp T1, and/or leaving air temp T2 are greater than a third temperature threshold c, if so, execute step
S206, if not, executing step S207.
S206 judges that electric heater PTC1, and/or electric heater PTC2 are closed extremely, the equal adhesion of contactless contactor A, B.
Control unit further executes anti-dry protection, controls inner blower and is in first state when standby.It is interior when the first state
Blower is opened according to middle wind file.
S207 judges that electric heater PTC1, and/or electric heater PTC2 are closed extremely, contactless contactor A adhesion, contact
It is normal that device switchs B state.Control unit controls inner blower and is in the second state when standby at this time.Interior wind when second state
Without opening when machine is standby.
Above-described embodiment is carried out under the premise of being worked normally based on temperature limiter L1, L2, if temperature limiter L1, L2 occur
Malfunction and failure, above-mentioned deterministic process, which is easy to appear, fails to judge, and equally exists security risk, therefore, on the basis of the above embodiments,
Further propose the more excellent embodiment of of the invention one:
In step S203, when judging that Time1 is greater than a first time threshold n1, and temperature limiter L1, and/or temperature limiter L2
Whether failure is reported, if not, executing step S208.
S208, setting is from when judge Time1 greater than a first time threshold n1, and whether temperature limiter L1, and/or temperature limiter L2
Report the time point of failure as starting point, the time begun to pass through is Time2, when judging that Time2 is greater than a second time threshold n2,
Whether leaving air temp T1, and/or leaving air temp T2 is greater than the first temperature threshold a, if so, step S204 is executed, if not, holding
Row step S209；
S209, control air-conditioner set enter shutdown standby mode, and control unit controls inner blower and is in third when standby
State.Without opening when inner blower is standby when the third state.
S210, it is Time3 that the time begun to pass through from step S209 air-conditioner set enters and shuts down standby mode, which is arranged, is sentenced
When disconnected Time3 is greater than a third time threshold n3, whether leaving air temp T1, and/or leaving air temp T2 are greater than a second temperature threshold
Value b, if so, step S204 is executed, if not, executing step S211.
S211, judges electric heater PTC1/PTC2 normal switching-off, and contactless contactor A is normal.Contactor is further disconnected to open
B is closed, inner blower is controlled and is in the 4th state when standby.Without opening when inner blower is standby when four state.
Protection circuit detects the air side PTC temperature by temperature limiter, in conjunction with system temperature sensing package whether to judge PTC as a result,
Dry combustion method and contactless contactor whether adhesion, if it is determined that PTC dry combustion method, control circuit is reduced by the air-supply of control inner blower
PTC dry combustion method temperature avoids the occurrence of accident, and reminds user maintenance equipment by fault cues.
Preferably, the value range of the first time threshold n1 in the present embodiment is 1 to 10 minutes, second time threshold n2
Value range be 1 to 10 minutes, the value range of third time threshold n3 is 1 to 10 minutes, and the 4th time threshold n4's takes
Being worth range is 5 to 10 minutes, and the value range of the first temperature threshold a is 50-70 DEG C, and the value range of second time threshold b is
50-70 DEG C, the value range of third time threshold c is 50-70 DEG C.The value range of temperature limiter threshold value is 150-250 DEG C.
The present invention through the above scheme, can detect dry combustion method failure in time, avoid abnormal high temperature caused by dry combustion method and PTC mistake
Thermal breakdown short circuit problem, while failure is fed back into user, PTC reliability is on the one hand improved, PTC dry combustion method is effectively avoided the occurrence of
Situation enhances air-conditioning safety in utilization.
Through the above description of the embodiments, those skilled in the art can be understood that according to above-mentioned implementation
The method of example can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but it is very much
In the case of the former be more preferably embodiment.Based on this understanding, technical solution of the present invention is substantially in other words to existing
The part that technology contributes can be embodied in the form of software products, which is stored in a storage
In medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be mobile phone, calculate
Machine, server or network equipment etc.) execute method described in each embodiment of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, according to
According to technical spirit any simple modification, equivalent change and modification to the above embodiments of the invention, this hair is still fallen within
In the range of bright technical solution.
Claims (27)
1. a kind of electric heater protective device characterized by comprising
Leaving air temp acquisition unit and control unit；
Wherein, the leaving air temp acquisition unit is used to acquire the affiliated air-conditioning of the electric heater going out in heating mode operation
Air temperature；
Described control unit is used to determine whether the electric heater occurs dry combustion method according to the leaving air temp, if electric heating occurs
Device dry combustion method, the then inner blower for controlling the air-conditioning work according to predetermined state；
Described control unit determines whether the electric heater occurs dry combustion method, comprising:
Disconnect first contactor switch；
Close electric heater；
When judging that the first interval time begun to pass through from closing electric heater is greater than the first time threshold of a setting, electric heating
Whether device temperature alarming unit reports failure, if so, electric heater dry combustion method occurs for judgement, and determines the first contactor switch
Failure.
2. device as described in claim 1, further includes:
Electric heater temperature alarming unit, the electric heater temperature alarming unit is for detecting electric heater temperature, if inspection
The electric heater temperature measured is greater than electric heater temperature alarming threshold value, electric heater temperature alarming unit report failure；
Whether described control unit is further used for reporting failure true according to the leaving air temp and electric heater temperature alarming unit
Whether the fixed electric heater occurs dry combustion method.
3. device as claimed in claim 1 or 2, further includes:
First contactor switch, connect with the first end of electric heater；
Second contactor switch, connect with the second end of electric heater.
4. device as described in claim 1, described control unit determine whether the electric heater occurs dry combustion method, further includes:
It is described to judge whether electric heater temperature alarming unit reports failure when the first interval time was greater than first time threshold, if
As a result be it is no, judge when from judging when the first interval time being greater than first time threshold electric heater temperature alarming unit is whether
When the second interval time that report failure is begun to pass through is greater than the second time threshold of a setting, the leaving air temp acquisition unit inspection
Whether the leaving air temp of survey is greater than the first temperature threshold of a setting, if it is, electric heater dry combustion method, and first occur for judgement
Contactless contactor failure.
5. device as claimed in claim 4, described control unit determine whether the electric heater occurs dry combustion method, further includes:
The wind-warm syndrome out of judgement leaving air temp acquisition unit detection when the second interval time being greater than second time threshold
Whether degree is greater than one first temperature threshold, if result is no, execution operations described below:
Close inner blower；
Judge when self closing inner blower acts the third interval time begun to pass through and is greater than the third time threshold of a setting, it is described
Whether the leaving air temp of leaving air temp acquisition unit detection is greater than the second temperature threshold value of a setting；
If so, electric heater dry combustion method, and first contactor switch fault occur for judgement；If not, electric heater occurs for judgement
Normal switching-off, and first contactor switch is normal.
6. such as claim 4-5 described in any item devices, described control unit determines whether the electric heater occurs dry combustion method,
Further include:
If it is determined that electric heater dry combustion method occurs, and first contactor switch fault, operations described below is further executed:
Disconnect second contactor switch；
Judgement is greater than the 4th time threshold of a setting when the 4th interval time begun to pass through from disconnection second contactor
When, whether the leaving air temp of the leaving air temp acquisition unit detection is greater than the third temperature threshold of a setting；
If so, electric heater dry combustion method, and first contactor switch, second contactor switch fault occur for judgement；If not, sentencing
It is disconnected that electric heater dry combustion method, first contactor switch fault occurs, and second contactor switch is normal.
7. such as claim 4-5 described in any item devices, described control unit determines whether the electric heater occurs dry combustion method,
Further include:
In case of electric heater dry combustion method, the first, second contactless contactor failure, control unit control inner blower when standby at
In first state；
And/or in case of electric heater dry combustion method, first contactor switch fault, second contactor switch is normal, control unit
It controls inner blower and is in the second state when standby；
And/or if electric heater normal switching-off, and first contactor switch is normal, control unit controls inner blower standby
When be in the third state.
8. device as claimed in claim 7, wherein
Inner blower is opened according to middle wind file when the first state；
And/or inner blower is closed when second state；
And/or inner blower is closed when the third state.
9. device as claimed in claim 2, the value range of electric heater temperature alarming threshold value is 150-250 DEG C.
10. such as the described in any item devices of claim 8-9, wherein
The value range of first time threshold is 1 to 10 minutes；
And/or the value range of second time threshold is 1 to 10 minutes；
And/or the value range of third time threshold is 1 to 10 minutes；
And/or the 4th time threshold value range be 5 to 10 minutes；
And/or first temperature threshold value range be 50-70 DEG C；
And/or the value range of second time threshold is 50-70 DEG C；
And/or the value range of third time threshold is 50-70 DEG C.
11. further including fault cues unit such as the described in any item devices of claim 1-2,4-5,8-9, for when control list
When electric heater dry combustion method occurs for member judgement, prompt is issued under the control of the control unit.
12. device as claimed in claim 11, the fault cues unit is in display unit, loudspeaker, indicator light
It is one or more, prompt is issued by way of text, image, voice, buzzing, and/or flashing lamp.
13. a kind of electric heater guard method, which is characterized in that include the following steps:
Acquire leaving air temp of the affiliated air-conditioning of the electric heater in heating mode operation；
It determines whether the electric heater occurs dry combustion method according to the leaving air temp, if electric heater dry combustion method occurs, controls institute
The inner blower for stating air-conditioning works according to predetermined state；
Whether the determination electric heater occurs dry combustion method, specifically:
Disconnect first contactor switch；
Close electric heater；
When judging that the first interval time begun to pass through from closing electric heater is greater than the first time threshold of a setting, electric heating
Whether device temperature alarming unit reports failure, if so, electric heater dry combustion method occurs for judgement, and determines the first contactor switch
Failure.
14. method as claimed in claim 13, further includes following step:
Electric heater temperature is detected, if the electric heater temperature detected is greater than electric heater temperature alarming threshold value, uses electricity
Heter temperature alarm unit report failure；
Failure whether is reported to determine whether the electric heater occurs according to the leaving air temp and electric heater temperature alarming unit
Dry combustion method.
15. method according to claim 13 or 14, further includes following step:
First contactor is switched and is connect with the first end of electric heater；
Second contactor is switched and is connect with the second end of electric heater.
16. method as claimed in claim 13, it further includes following steps that whether the determination electric heater, which occurs dry combustion method,
It is rapid:
It is described to judge whether electric heater temperature alarming unit reports failure when the first interval time was greater than first time threshold, if
As a result be it is no, judge when from judging when the first interval time being greater than first time threshold electric heater temperature alarming unit is whether
When the second interval time that report failure is begun to pass through is greater than the second time threshold of a setting, whether leaving air temp is greater than a setting
The first temperature threshold, if it is, electric heater dry combustion method, and first contactor switch fault occur for judgement.
17. the method described in claim 16, it further includes following steps that whether the determination electric heater, which occurs dry combustion method,
It is rapid:
Whether judgement leaving air temp when the second interval time being greater than second time threshold is greater than one first temperature threshold, such as
Fruit result is no, execution operations described below:
Close inner blower；
Judge the outlet air when self closing inner blower acts the third interval time begun to pass through and is greater than the third time threshold of a setting
Whether temperature is greater than the second temperature threshold value of a setting；
If so, electric heater dry combustion method, and first contactor switch fault occur for judgement；If not, electric heater occurs for judgement
Normal switching-off, and first contactor switch is normal.
18. such as the described in any item methods of claim 16-17, whether the determination electric heater occurs dry combustion method, also wraps
Include following step:
If it is determined that electric heater dry combustion method occurs, and first contactor switch fault, operations described below is further executed:
Disconnect second contactor switch；
Judgement is greater than the 4th time threshold of a setting when the 4th interval time begun to pass through from disconnection second contactor
When, whether leaving air temp is greater than the third temperature threshold of a setting；
If so, electric heater dry combustion method, and first contactor switch, second contactor switch fault occur for judgement；If not, sentencing
It is disconnected that electric heater dry combustion method, first contactor switch fault occurs, and second contactor switch is normal.
19. such as the described in any item methods of claim 16-17, whether the determination electric heater occurs dry combustion method, also wraps
It includes:
In case of electric heater dry combustion method, the first, second contactless contactor failure controls inner blower and is in the first shape when standby
State；
And/or in case of electric heater dry combustion method, first contactor switch fault, second contactor switch is normal, controls interior wind
Machine is in the second state when standby；
And/or if electric heater normal switching-off, and first contactor switch is normal, controls inner blower when standby in the
Three condition.
20. method as claimed in claim 19, wherein
Inner blower is opened according to middle wind file when the first state；
And/or inner blower is closed when second state；
And/or inner blower is closed when the third state.
21. method as claimed in claim 14, the value range of electric heater temperature alarming threshold value is 150-250 DEG C.
22. such as the described in any item methods of claim 20-21, wherein
The value range of first time threshold is 1 to 10 minutes；
And/or the value range of second time threshold is 1 to 10 minutes；
And/or the value range of third time threshold is 1 to 10 minutes；
And/or the 4th time threshold value range be 5 to 10 minutes；
And/or first temperature threshold value range be 50-70 DEG C；
And/or the value range of second time threshold is 50-70 DEG C；
And/or the value range of third time threshold is 50-70 DEG C.
23. such as the described in any item methods of claim 13-14,16-17,20-21, when electric heater dry combustion method occurs, by event
Hinder prompt unit and issues prompt.
24. method as claimed in claim 23, the fault cues unit is in display unit, loudspeaker, indicator light
It is one or more, prompt is issued by way of text, image, voice, buzzing, and/or flashing lamp.
25. a kind of air-conditioning, comprising:
Electric heater；
Inner blower；
Electric heater protective device, the electric heater protective device are that the described in any item electric heaters of claim 1-12 are protected
Protection unit.
26. a kind of computer readable storage medium, which is characterized in that be stored thereon with computer program, described program is processed
The step of claim 13-24 any the method is realized when device executes.
27. a kind of air-conditioning, which is characterized in that can be transported on a processor on a memory including processor, memory and storage
The step of capable computer program, the processor realizes claim 13-24 any the method when executing described program.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711221573.7A CN108180595B (en) | 2017-11-23 | 2017-11-23 | A kind of electric heater guard method, device and air-conditioning |
| PCT/CN2018/100952 WO2019100774A1 (en) | 2017-11-23 | 2018-08-17 | Electric heater protection method and device, and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711221573.7A CN108180595B (en) | 2017-11-23 | 2017-11-23 | A kind of electric heater guard method, device and air-conditioning |
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| CN108180595B true CN108180595B (en) | 2019-10-01 |
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| WO (1) | WO2019100774A1 (en) |
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| CN108180595B (en) * | 2017-11-23 | 2019-10-01 | 珠海格力电器股份有限公司 | A kind of electric heater guard method, device and air-conditioning |
| CN109028458B (en) * | 2018-07-31 | 2020-07-31 | 奥克斯空调股份有限公司 | Fault processing method and device and air conditioner |
| CN110398049B (en) * | 2019-07-26 | 2021-03-19 | 广东美的暖通设备有限公司 | Air conditioner control method, air conditioner and computer readable storage medium |
| CN111245079A (en) * | 2020-01-09 | 2020-06-05 | 珠海格力电器股份有限公司 | Air conditioner control method, device and equipment and air conditioner |
| CN111728549A (en) * | 2020-06-01 | 2020-10-02 | 上海明略人工智能(集团)有限公司 | Fault positioning method and device of dish washing machine, storage medium and electronic device |
| CN112303818B (en) * | 2020-10-23 | 2021-10-29 | 珠海格力电器股份有限公司 | Defrosting control device and method of air conditioning system and air conditioning system |
| CN112696800B (en) * | 2020-12-25 | 2021-11-19 | 珠海格力电器股份有限公司 | Electric heater protection method and device of air conditioner, storage medium and air conditioner |
| CN113418273A (en) * | 2021-06-30 | 2021-09-21 | 珠海拓芯科技有限公司 | Electrical heating relay thermal fault detection method and air conditioner |
| CN113551370B (en) * | 2021-07-12 | 2022-07-26 | 珠海格力电器股份有限公司 | Dry burning detection method of air conditioner and air conditioner |
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| CN108180595A (en) | 2018-06-19 |
| WO2019100774A1 (en) | 2019-05-31 |
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