CN106839302A - Realize the method and system of convertible frequency air-conditioner fire prevention control - Google Patents
Realize the method and system of convertible frequency air-conditioner fire prevention control Download PDFInfo
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- CN106839302A CN106839302A CN201710055980.9A CN201710055980A CN106839302A CN 106839302 A CN106839302 A CN 106839302A CN 201710055980 A CN201710055980 A CN 201710055980A CN 106839302 A CN106839302 A CN 106839302A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
Abstract
The invention discloses a kind of method and system for realizing convertible frequency air-conditioner fire prevention control, methods described includes：During operation of air conditioner, obtain in real time the temperature of air conditioner power source plug inside obtained as current power supply temperature, in real time air-conditioning temperature indoors as current indoor environment temperature；The temperature difference between the current power supply temperature and the current indoor environment temperature is obtained as the current temperature difference, the current temperature difference is made comparisons with temperature difference threshold；If the current temperature difference is not less than current first temperature difference threshold, control air-conditioning is shut down；If less than current first temperature difference threshold but not less than the second temperature difference threshold, the operating current to compressor of air conditioner is adjusted the current temperature difference so that the current temperature difference is less than current first temperature difference threshold.Using the present invention, the accuracy and reliability of fire prevention control can be improved on the basis of air-conditioner temperature regulation comfortableness is taken into account.
Description
Technical field
The invention belongs to air conditioner controlling technology field, specifically, be related to realize convertible frequency air-conditioner fire prevention control method and
Control system.
Background technology
Air-conditioning as the larger equipment of operating current in home appliance, its work running in, often in the presence of because
For electric current is excessive or the reason such as electric leakage causes circuit structure temperature too high and generates heat, fire incident can occur when serious, burn sky
Part is adjusted, the damage of product is caused, and also there is larger potential safety hazard.
In order to reduce the generation of air-conditioning fire incident, prior art is provided with temperature protection in air-conditioning, and implementation is
Temperature sensor is set in air-conditioning electric control box, the temperature of electric-controlled box is detected using temperature sensor.When the temperature mistake of electric-controlled box
Gao Shi, cuts off the working power of air-conditioning, and control air-conditioning is directly shut down.
Using the above-mentioned technical proposal of the setting temperature protection in air-conditioning, air-conditioning can be controlled when control box temperature is too high
Shut down, reduce the generation of air-conditioning fire incident.But, in actual applications, the change of temperature can be delayed in air-conditioner control box
It is located inside air-conditioning in the change of the power network current powered for air-conditioning, and control box, its temperature is vulnerable to interior during operation of air conditioner
Portion's heat exchange temperature influences and causes detection inaccurate.On the other hand, air-conditioning is controlled directly to stop when the temperature of electric-controlled box is too high
Machine, control device is single, does not account for because the outer high factor of of short duration liter of the caused electric-controlled box temperature of interference, and control is empty
Straightening connects shutdown will cause indoor temperature to adjust comfortableness decline.
The content of the invention
It is an object of the invention to provide a kind of method and system for realizing convertible frequency air-conditioner fire prevention control, air-conditioner temperature is being taken into account
The accuracy and reliability of fire prevention control are improved on the basis of regulation comfortableness.
For achieving the above object, the method that the present invention is provided is achieved using following technical proposals：
A kind of method for realizing convertible frequency air-conditioner fire prevention control, methods described includes：
During operation of air conditioner, the temperature of air conditioner power source plug inside is obtained in real time and obtains empty as current power supply temperature, in real time
Adjust temperature indoors as current indoor environment temperature；
The temperature difference between the current power supply temperature and the current indoor environment temperature is obtained as the current temperature difference, described will be worked as
The preceding temperature difference is made comparisons with temperature difference threshold；
If the current temperature difference is not less than current first temperature difference threshold, control air-conditioning is shut down；
If the current temperature difference is less than current first temperature difference threshold but not less than the second temperature difference threshold, to compressor of air conditioner
Operating current be adjusted so that the current temperature difference be less than current first temperature difference threshold；
Current first temperature difference threshold and air-conditioning service life positive correlation, and determined according to the air-conditioning service life.
Method as described above, current first temperature difference threshold and air-conditioning service life positive correlation, and according to the sky
Adjust service life to determine, specifically include：
The currently used time limit of air-conditioning is obtained, current first temperature difference threshold is obtained according to following formula：
The current first temperature difference threshold=currently used time limit of initial threshold+A* air-conditionings；
Wherein, coefficient A is positive number, and the currently used time limit of air-conditioning is according to air-conditioning accumulated running time or the accumulative operation day of air-conditioning
Number determines.
Method as described above, the operating current to compressor of air conditioner is adjusted so that the current temperature difference is small
In current first temperature difference threshold, specifically include：
The current working current of compressor is obtained, the current working current is reduced and is obtained real work electric current；
Run according to the real work current control compressor of air conditioner.
Method as described above, during being run according to the real work current control compressor of air conditioner, continues
The temperature difference between the current power supply temperature and the current indoor environment temperature is obtained as the current temperature difference, by the current temperature
Difference is made comparisons with the preceding temperature difference for once obtaining；The preceding temperature difference for once obtaining is previous power supply temperature and previous indoor ring
The temperature difference between the temperature of border；
If the current temperature difference continues according to the real work current control air-conditioning pressure less than the preceding temperature difference for once obtaining
Contracting machine runs；
If the current temperature difference is not less than the preceding temperature difference for once obtaining, again by the current temperature difference and described current first
Temperature difference threshold and second temperature difference threshold are made comparisons, and the control of air-conditioning is performed according to comparative result.
Method as described above, the current working current of the acquisition compressor reduces the current working current and obtains
Real work electric current, specifically includes：
The current working current of compressor is obtained, real work electric current is obtained according to the following equation：
Real work electric current=a* current working currents-b；
Wherein, coefficient a is no more than 1 positive number, and b is more than 0.
Method as described above, at least in the current temperature difference not less than current first temperature difference threshold and described current
The temperature difference controls air-conditioning output alarm signal less than current first temperature difference threshold but during not less than second temperature difference threshold
And/or point out the cue of the current power supply temperature.
To realize aforementioned invention purpose, the system that the present invention is provided is realized using following technical proposals：
A kind of system for realizing convertible frequency air-conditioner fire prevention control, including convertible frequency air-conditioner and air conditioner power source plug to be controlled, the system
System also includes：
Power supply temperature detection unit, for obtaining the temperature of the air conditioner power source plug inside as current power supply temperature；
Indoor environment temperature detection unit, for obtain air-conditioning temperature indoors as current indoor environment temperature；
Temperature difference acquiring unit, for obtaining the temperature difference conduct between the current power supply temperature and the current indoor environment temperature
The current temperature difference；
Temperature difference comparing unit, at least for the current temperature difference to be compared with temperature difference threshold, and exports comparative result；
Current first temperature difference threshold determining unit, for determining current first temperature difference threshold according to air-conditioning service life；It is described to work as
Preceding first temperature difference threshold and air-conditioning service life positive correlation；
Conditioning control unit, for the comparative result in the temperature difference comparing unit for the current temperature difference is current not less than described
Air-conditioning is controlled to shut down during the first temperature difference threshold, in the current temperature difference less than current first temperature difference threshold but not less than the
Two temperature difference thresholds, the operating current to compressor of air conditioner is adjusted so that the current temperature difference is less than current first temperature
Difference limen value.
System as described above, also includes：
Alarm signal and/or cue output unit, for warm not less than described current first at least in the current temperature difference
When difference limen value and the current temperature difference are less than current first temperature difference threshold but not less than second temperature difference threshold, control
The cue of air-conditioning output alarm signal and/or the prompting current power supply temperature.
Compared with prior art, advantages and positive effects of the present invention are：It is proposed by the present invention to realize that convertible frequency air-conditioner is prevented fires
In the method and system of control, the power supply temperature of air conditioner power source plug inside is detected, according between power supply temperature and environment temperature
The size of the temperature difference different controls are performed to air-conditioning, when the temperature difference is more than current first temperature difference threshold, show power supply temperature mistake
Height, reaches shutdown temperature, then control air-conditioning directly to shut down, it is to avoid air-conditioning works on and produces Fire Overheat accident；In the temperature difference
During not less than the second temperature difference threshold but less than current first temperature difference threshold, show that power supply temperature is higher, shut down but without reaching
Temperature, now, air-conditioning is not shut down and is worked on, however, it is desirable to be adjusted to the operating current of compressor of air conditioner so that power supply
Temperature is under shutdown temperature, and continuing adjustment indoor temperature, guarantee indoor temperature as far as possible in air-conditioning adjusts the same of comfortableness
When avoid power supply temperature too high and firing accident occur, the realization prevention in advance and control caught fire to high temperature.And, current first
Temperature difference threshold is not fixed value, but with air-conditioning service life positive correlation, according to air-conditioning service life be dynamically determined can variable threshold
Value, more meets air-conditioning real use state, it is to avoid because of the problem that unreliable or temperature adjustment performance of being prevented fires caused by erroneous judgement declines
Generation.Additionally, the temperature difference between the power supply temperature and environment temperature of the air conditioner power source plug inside based on detection is used as judgement
Parameter, on the one hand, the temperature of air conditioner power source plug inside directly, rapidly follows the change of the power network current powered for air-conditioning,
Only disturbed by environment temperature；On the other hand, influence of the environment temperature to power supply temperature can be excluded again, thus, judge ginseng
Number is more reliable, stable, accurate.Thus, using control method of the invention and control system, air-conditioner temperature regulation can taken into account
The accuracy and reliability of fire prevention control are improved on the basis of comfortableness.
After specific embodiment of the invention is read in conjunction with the figure, the other features and advantages of the invention will become more clear
Chu.
Brief description of the drawings
Fig. 1 is the flow chart of method one embodiment that convertible frequency air-conditioner fire prevention control is realized based on the present invention；
Fig. 2 is the flow chart that another embodiment of the method for convertible frequency air-conditioner fire prevention control is realized based on the present invention；
Fig. 3 is the structural representation of system one embodiment that convertible frequency air-conditioner fire prevention control is realized based on the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below with reference to drawings and Examples,
The present invention is described in further detail.
Fig. 1 is referred to, the figure show the flow chart of control method one embodiment of being prevented fires based on convertible frequency air-conditioner of the present invention.
As schematically shown in Figure 1, the embodiment realizes the method for convertible frequency air-conditioner fire prevention control using the process with following step
To realize：
Step 101：During operation of air conditioner, the temperature of air conditioner power source plug inside is obtained in real time as current power supply temperature, it is real
When obtain air-conditioning temperature indoors as current indoor environment temperature.
Current power supply temperature refers to the real time temperature of the air conditioner power source plug inside constantly obtained according to setting sample frequency,
What is reflected is the temperature of air-conditioning feeder ear, can be realized by setting temperature detection part in air conditioner power source plug inside.
In air-conditioning start running, acquired current power supply temperature reflects the operating temperature of air-conditioning feeder ear, the temperature be with
Change with the change of the power network current namely air-conditioning work electric current powered for air-conditioning, electric current is bigger, and temperature is higher.Also, by
In the current power supply temperature be the temperature of air conditioner power source plug inside, it is distant with air conditioner main body, air conditioner main body will not be subject to
The influence of internal temperature.
During operation of air conditioner, also obtain in real time air-conditioning temperature indoors as current indoor environment temperature, instead
Reflect be air-conditioning real-time indoor environment temperature indoors.The detection means of indoor environment temperature can using prior art come
Realize, be not specifically addressed herein and limit.
Step 102：The temperature difference between current power supply temperature and current indoor environment temperature is obtained as the current temperature difference, ought
The preceding temperature difference is made comparisons with temperature difference threshold.
In air-conditioning work running, current power supply temperature can be higher than current indoor environment temperature.Also, current power supply
Temperature also suffers from the influence of indoor environment temperature in addition to related to supply current size.General, indoor environment temperature
Higher, power supply temperature also can be higher；Vice versa.The influence in view of environment temperature on power supply temperature, in this step, meter
The temperature difference between current power supply temperature and current indoor environment temperature is calculated, as the current temperature difference, and using the current temperature difference as entering
The judgement parameter of row fire prevention control, makes comparisons with temperature difference threshold, and makees corresponding control to air-conditioning according to comparative result.
Wherein, temperature difference threshold can be a threshold value or multiple threshold values, and in this embodiment, temperature difference threshold includes two
Individual, respectively current first temperature difference threshold and the second temperature difference threshold, current first temperature difference threshold are more than the second temperature difference threshold.Currently
First temperature difference threshold is the maximum temperature threshold value that air-conditioning can be remained on, and is also a temperature threshold for being easy to produce fire
Value.And, current first temperature difference threshold is not a fixed value, but variable value.Specifically, it is with air-conditioning service life just
Variable thresholding that is related, being dynamically determined according to air-conditioning service life.That is, air-conditioning service life is more long, current first temperature difference threshold
Value is bigger.Because, with the growth of air-conditioning service life, air conditioner main body part and air conditioner power source plug etc. can all occur
The increasingly severe problem of aging of degree, in course of normal operation, the power supply temperature inside attaching plug also can be higher.Cause
This, used as current first temperature difference threshold of temperature judgement, value also becomes big.So as to, more meet air-conditioning it is actually used and operation
State, it is to avoid threshold value is fixed and is also easy to produce the hair of the problem that fire prevention caused by erroneous judgement is unreliable or temperature adjustment performance declines
It is raw.But the second temperature difference threshold is air-conditioning can be run in the presence of a temperature threshold for producing fire hazard, second temperature difference threshold
Value can be fixed value, and can be changed by authorizing.
As the presently preferred embodiments, current first temperature difference threshold and air-conditioning service life positive correlation, and year is used according to air-conditioning
Limit determines, specifically includes：
The currently used time limit of air-conditioning is obtained, current first temperature difference threshold is obtained according to following formula：
The current first temperature difference threshold=currently used time limit of initial threshold+A* air-conditionings.
Wherein, coefficient A is positive number.Preferably, A=0.05-2.3.Initial threshold is known numerical value, when air-conditioning dispatches from the factory
It was determined that the later stage can be changed by authorizing.The currently used time limit of air-conditioning is tired according to air-conditioning accumulated running time or air-conditioning
Meter days running determines.
For example, the currently used time limit of air-conditioning determines according to air-conditioning accumulated running time.Specifically, frequency is used according to air-conditioning
Rate, is often reached 180*16=2880 hours according to accumulated running time, and air-conditioning service life adds the method for 1 year to be made calculating air-conditioning
Use the time limit.So, current total accumulated running time is got first, according to current total accumulated running time and the accumulation of the above-mentioned time limit
Mode can calculate the currently used time limit of air-conditioning corresponding to current total accumulated running time.Then, it is currently used according to air-conditioning
The time limit and above-mentioned formula calculate current first temperature difference threshold, and threshold value used is judged as following temperature difference.
Again for example, the currently used time limit of air-conditioning determines according to the accumulative days running of air-conditioning.Specifically, used according to air-conditioning
Frequency, reaches 200 days according to per accumulated running time, and air-conditioning service life adds the method for 1 year to calculate air-conditioning service life.That
, air-conditioning is got first and currently always adds up days running, according to current always accumulative days running and above-mentioned time limit accumulation mode
The currently used time limit of air-conditioning corresponding to current total accumulative days running can be calculated.Then, according to the currently used time limit of air-conditioning
Current first temperature difference threshold is calculated with above-mentioned formula, threshold value used is judged as following temperature difference.
With the development of intelligent air condition technology, when can easily get the accumulative days running of air-conditioning or accumulative operation
Between, therefore, it is possible to easily determine current first temperature difference threshold.
Step 103：If the current temperature difference is not less than current first temperature difference threshold, control air-conditioning is shut down；If the current temperature difference is less than
Current first temperature difference threshold but not less than the second temperature difference threshold, the operating current to compressor of air conditioner is adjusted so that current
The temperature difference is less than current first temperature difference threshold.
The step is according to the control corresponding to air-conditioning work with the comparative result of temperature difference threshold of the current temperature difference in step 102
Process.Specifically, if the current temperature difference is not less than current first temperature difference threshold, show under current indoor environment temperature, when
Preceding power supply temperature is too high, reaches the max-thresholds of fire prevention control, namely reaches shutdown temperature, and control air-conditioning is directly shut down, and keeps away
Exempt from air-conditioning continue to run with and so that power supply temperature further raise and produce fire incident.Although if the current temperature difference is less than current
First temperature difference threshold, not less than the second temperature difference threshold, although show that current power supply temperature is also not up to shutdown temperature, but
It is also higher temperature, if not making further regulation and control, it is likely that can also cause that power supply temperature is further raised and reaches shutdown
Temperature.In this case, it is contemplated that the use of the purpose of air-conditioning is regulation indoor temperature, more comfortable environment, this feelings are obtained
Under condition, air-conditioning is not shut down and is worked on, however, it is desirable to the operating current of compressor of air conditioner is adjusted, and the target for adjusting
It is so that the current temperature difference is less than current first temperature difference threshold.That is, using the current temperature difference less than current first temperature difference threshold as control
Target processed, adjusts to compressor operating electric current.Compressor operating curent change, air conditioner load change, power supply temperature also can be with
With changing, so as to reach the current temperature difference not less than current first temperature difference threshold by the adjustment to compressor operating electric current
Adjustment target.
Fig. 2 is referred to, the figure show the flow based on another embodiment of convertible frequency air-conditioner of the present invention fire prevention control method
Figure.
As schematically shown in Figure 2, the embodiment realizes the method for convertible frequency air-conditioner fire prevention control using the process with following step
To realize：
Step 201：During operation of air conditioner, the temperature of air conditioner power source plug inside is obtained in real time as current power supply temperature, it is real
When obtain air-conditioning temperature indoors as current indoor environment temperature.
Step 202：The temperature difference between current power supply temperature and current indoor environment temperature is obtained as the current temperature difference, ought
The preceding temperature difference is made comparisons with temperature difference threshold.
The process that implements of above-mentioned two step refers to the description that Fig. 1 embodiments correspond to step, does not repeat herein.
Step 203：Whether the current temperature difference is less than current first temperature difference threshold.If so, performing step 205；If it is not, performing step
Rapid 204.
It is similar with Fig. 1 embodiments, in Fig. 2 embodiments, temperature difference threshold also include current first temperature difference threshold and
Second temperature difference threshold, the implication of the two temperature difference thresholds, effect and determination mode are similar with Fig. 1 embodiments.In the step 203
In, judge whether the current temperature difference that step 202 is obtained is less than current first temperature difference threshold, and step is performed according to judged result
204 or step 205.
Step 204：Control air-conditioning is shut down.
If step 203 judges that the current temperature difference, not less than current first temperature difference threshold, shows in current indoor environment temperature
Under, current power supply temperature is too high, reaches the max-thresholds of fire prevention control, namely reaches shutdown temperature, and control air-conditioning is directly stopped
Machine, it is to avoid air-conditioning continue to run with and so that power supply temperature further raise and produce fire incident.
Step 205：Whether the current temperature difference is less than the second temperature difference threshold.If so, performing step 206；Otherwise, step is gone to
207。
If step 203 judges that the current temperature difference, less than current first temperature difference threshold, determines whether whether the current temperature difference is small
In the second temperature difference threshold, and step 206 or step 207 are performed according to judged result.
Step 206：Not mineral wool control.
If step 205 judges the current temperature difference less than the second temperature difference threshold, show that current power supply temperature is normal, be not in
Fire risk.In the case, to air-conditioning not mineral wool control, but air-conditioning work is controlled according to normal control process.
Step 207：The current working current of compressor is obtained, current working current is reduced and is obtained real work electric current, pressed
According to the facts border operating current control compressor of air conditioner operation.
If step 205 judges the current temperature difference not less than the second temperature difference threshold, although showing that current power supply temperature does not reach also
To shutdown temperature, but temperature is also higher, if not making further regulation and control, it is likely that can also cause that power supply temperature further rises
It is high and reach shutdown temperature.In this case, air-conditioning is not shut down and is worked on, however, it is desirable to the work to compressor of air conditioner
Electric current is adjusted.Also, the target being adjusted to operating current is still so that the current temperature difference is less than current first temperature difference threshold
Value.Specifically, it is the current working current of acquisition compressor, then, reduces current working current and obtain real work electric current,
Run according to real work current control compressor of air conditioner.
As the presently preferred embodiments, the current working current of compressor is obtained, current working current is reduced and is obtained real work
Electric current, specifically includes：
The current working current of compressor is obtained, real work electric current is obtained according to the following equation：
Real work electric current=a* current working currents-b；
Wherein, coefficient a is no more than 1 positive number, and b is more than 0.
Preferably, the span of coefficient a is 0.9-0.98；B is less than 1.5.
Step 208：Whether the current temperature difference is less than a preceding temperature difference.If so, performing step 209；If it is not, step 205 is gone to,
The current temperature difference is made comparisons with the second temperature difference threshold again.
Real work electric current, control compressor of air conditioner after step 207 is reduced run according to real work electric current
During, continue to obtain the temperature difference between current power supply temperature and current indoor environment temperature as the current temperature difference.Then, will
The current temperature difference is made comparisons with the preceding temperature difference for once obtaining, and performs step 209 or step 205 according to comparative result selection.Wherein,
The preceding temperature difference that once obtains refers to the temperature difference between previous power supply temperature and previous indoor environment temperature.
If the comparative result of the current temperature difference and a preceding temperature difference is not less than a preceding temperature difference for the current temperature difference, show in drop
After low compressor operating current, power supply temperature does not decline, then go to step 205, continues the current temperature difference and the second temperature
Difference limen value is made comparisons.If the current temperature difference continues executing with step 207, it is necessary to reduce again still not less than the second temperature difference threshold
Compressor real work electric current, until compressor operating electric current is reduced to zero and stops.
Step 209：Keep real work electric current constant.
If step 208 judges that the current temperature difference, less than a preceding temperature difference, shows after compressor operating electric current is reduced, supply
Electro-temperature has declined, then keep the real work electric current corresponding to the current temperature difference constant, no longer reduces compressor real work
Electric current.
However, it is to be understood that during step 206 not mineral wool control air-conditioning and step 209 keeps real
During the operating current invariance control air-conditioning of border, it is still desirable to according to the setting current power supply temperature of sample frequency acquisition and currently
Indoor environment temperature, and both current temperature difference are obtained, then, continue executing with the place that the current temperature difference is made comparisons with temperature difference threshold
Reason process.
In other embodiments, at least it is less than not less than current first temperature difference threshold and the current temperature difference in the current temperature difference current
First temperature difference threshold but during not less than the second temperature difference threshold, control air-conditioning output alarm signal and/or points out current power supply temperature
Cue.For example, control air-conditioning output characterizes the current temperature difference or the too high or higher alarm signal of current power supply temperature, and
Sound and light alarm is sent by acoustic-optic alarm；Or, control air-conditioning exports the current temperature difference or current power supply temperature and current
The cue of indoor environment temperature, and shown by display screen, pointed out with to current power supply temperature.
The control of convertible frequency air-conditioner is realized using the method for above-mentioned Fig. 1 embodiments or Fig. 2 embodiments, air conditioner power source plug is detected
Internal power supply temperature, the size according to the temperature difference between power supply temperature and environment temperature performs different controls to air-conditioning,
When the temperature difference is more than current first temperature difference threshold, show that power supply temperature is too high, reach shutdown temperature, then control air-conditioning directly to shut down,
Avoid air-conditioning from working on and produce Fire Overheat accident；In the temperature difference not less than the second temperature difference threshold but less than the current first temperature
During difference limen value, show that power supply temperature is higher, but without shutdown temperature is reached, now, air-conditioning is not shut down and worked on, but,
Need to be adjusted the operating current of compressor of air conditioner so that power supply temperature is under shutdown temperature, continue to adjust in air-conditioning
Whole indoor temperature, as far as possible ensure indoor temperature regulation comfortableness while avoid power supply temperature too high and firing accident occur,
Prevention in advance and control that realization is caught fire to high temperature.And, current first temperature difference threshold is not fixed value, but is used with air-conditioning
Time limit positive correlation, according to the variable thresholding that air-conditioning service life is dynamically determined, more meet air-conditioning real use state, it is to avoid because by mistake
The generation of the problem that unreliable or temperature adjustment performance of being prevented fires caused by sentencing declines.Additionally, the air conditioner power source plug based on detection
The temperature difference between internal power supply temperature and environment temperature is used as judging parameter, on the one hand, the temperature of air conditioner power source plug inside
Directly, the change of the power network current powered for air-conditioning is rapidly followed, is only disturbed by environment temperature；And energy on the other hand,
Influence of the environment temperature to power supply temperature is enough excluded, thus, judge that parameter is more reliable, stable, accurate.Thus, using the present invention
Control method and control system, can take into account air-conditioner temperature regulation comfortableness on the basis of improve fire prevention control accuracy
And reliability.
Fig. 3 is referred to, the figure show realizes system one embodiment that convertible frequency air-conditioner fire prevention is controlled based on the present invention
Structural representation.
As schematically shown in Figure 3, the embodiment realizes the system of convertible frequency air-conditioner fire prevention control except including as change to be controlled
Outside the air conditioner power source plug 32 of frequency air-conditioning 31 and the convertible frequency air-conditioner 31, included other structures unit, each construction unit
Function and relation each other it is as follows：
Indoor environment temperature detection unit 33, for obtain air-conditioning temperature indoors as current indoor environment temperature
Power supply temperature detection unit 34, for obtaining the temperature inside air conditioner power source plug 32 as current power supply temperature.
Temperature difference acquiring unit 35, current power supply temperature and indoor environment for obtaining the acquisition of power supply temperature detection unit 34
The temperature difference between the current indoor environment temperature that temperature detecting unit 33 is obtained is used as the current temperature difference.
Temperature difference comparing unit 36, at least compares for the current temperature difference for obtaining temperature difference acquiring unit 35 with temperature difference threshold,
And export comparative result.
Current first temperature difference threshold determining unit 37, for determining current first temperature difference threshold according to air-conditioning service life.
Wherein, current first temperature difference threshold and air-conditioning service life positive correlation.
Conditioning control unit 38, for the comparative result in temperature difference comparing unit 36 for the current temperature difference is not less than current first
Determined by temperature difference threshold determining unit 37 during current first temperature difference threshold, control convertible frequency air-conditioner 31 shut down, and Temperature Difference Ratio compared with
The comparative result of unit 36 be the current temperature difference less than current first temperature difference threshold but during not less than the second temperature difference threshold, to frequency conversion
The operating current of the compressor of air-conditioning 31 is adjusted so that the current temperature difference is less than current first temperature difference threshold.
Each construction unit in the embodiment control system runs corresponding software program, implements according to Fig. 1 or Fig. 2 methods
The process work of example, realizes the fire prevention control to convertible frequency air-conditioner 31, reaches the technique effect achieved by preceding method.
In other embodiments, convertible frequency air-conditioner anti-fire control system can also include that alarm signal and/or cue are defeated
Go out unit, for being at least less than current first temperature difference threshold not less than current first temperature difference threshold and the current temperature difference in the current temperature difference
Value but during not less than the second temperature difference threshold, control air-conditioning output alarm signal and/or points out the prompting letter of current power supply temperature
Number.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although with reference to foregoing reality
Example is applied to be described in detail the present invention, for the person of ordinary skill of the art, still can be to foregoing implementation
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these are changed or replace
Change, do not make the spirit and scope of the essence disengaging claimed technical solution of the invention of appropriate technical solution.
Claims (8)
1. it is a kind of to realize the method that convertible frequency air-conditioner fire prevention is controlled, it is characterised in that methods described includes：
During operation of air conditioner, the temperature of air conditioner power source plug inside is obtained in real time and obtains empty as current power supply temperature, in real time
Adjust temperature indoors as current indoor environment temperature；
The temperature difference between the current power supply temperature and the current indoor environment temperature is obtained as the current temperature difference, described will be worked as
The preceding temperature difference is made comparisons with temperature difference threshold；
If the current temperature difference is not less than current first temperature difference threshold, control air-conditioning is shut down；
If the current temperature difference is less than current first temperature difference threshold but not less than the second temperature difference threshold, to compressor of air conditioner
Operating current be adjusted so that the current temperature difference be less than current first temperature difference threshold；
Current first temperature difference threshold and air-conditioning service life positive correlation, and determined according to the air-conditioning service life.
2. method according to claim 1, it is characterised in that current first temperature difference threshold is with air-conditioning service life just
Correlation, and determined according to the air-conditioning service life, specifically include：
The currently used time limit of air-conditioning is obtained, current first temperature difference threshold is obtained according to following formula：
The current first temperature difference threshold=currently used time limit of initial threshold+A* air-conditionings；
Wherein, coefficient A is positive number, and the currently used time limit of air-conditioning is according to air-conditioning accumulated running time or the accumulative operation day of air-conditioning
Number determines.
3. method according to claim 1, it is characterised in that the operating current to compressor of air conditioner is adjusted,
So that the current temperature difference is less than current first temperature difference threshold, specifically include：
The current working current of compressor is obtained, the current working current is reduced and is obtained real work electric current；
Run according to the real work current control compressor of air conditioner.
4. method according to claim 3, it is characterised in that according to the real work current control compressor of air conditioner
During operation, continue to obtain the temperature difference between the current power supply temperature and the current indoor environment temperature as current
The temperature difference, the current temperature difference is made comparisons with the preceding temperature difference for once obtaining；The preceding temperature difference for once obtaining is previous power supply temperature
The temperature difference between degree and previous indoor environment temperature；
If the current temperature difference continues according to the real work current control air-conditioning pressure less than the preceding temperature difference for once obtaining
Contracting machine runs；
If the current temperature difference is not less than the preceding temperature difference for once obtaining, again by the current temperature difference and described current first
Temperature difference threshold and second temperature difference threshold are made comparisons, and the control of air-conditioning is performed according to comparative result.
5. method according to claim 3, it is characterised in that the current working current of the acquisition compressor, reduces institute
State current working current and obtain real work electric current, specifically include：
The current working current of compressor is obtained, real work electric current is obtained according to the following equation：
Real work electric current=a* current working currents-b；
Wherein, coefficient a is no more than 1 positive number, and b is more than 0.
6. method according to any one of claim 1 to 5, it is characterised in that be at least not less than in the current temperature difference
Current first temperature difference threshold and the current temperature difference are less than current first temperature difference threshold but not less than the described second temperature
During difference limen value, the cue of control air-conditioning output alarm signal and/or the prompting current power supply temperature.
7. a kind of to realize the system that convertible frequency air-conditioner fire prevention is controlled, including convertible frequency air-conditioner and air conditioner power source plug to be controlled, it is special
Levy and be, the system also includes：
Power supply temperature detection unit, for obtaining the temperature of the air conditioner power source plug inside as current power supply temperature；
Indoor environment temperature detection unit, for obtain air-conditioning temperature indoors as current indoor environment temperature；
Temperature difference acquiring unit, for obtaining the temperature difference conduct between the current power supply temperature and the current indoor environment temperature
The current temperature difference；
Temperature difference comparing unit, at least for the current temperature difference to be compared with temperature difference threshold, and exports comparative result；
Current first temperature difference threshold determining unit, for determining current first temperature difference threshold according to air-conditioning service life；It is described to work as
Preceding first temperature difference threshold and air-conditioning service life positive correlation；
Conditioning control unit, for the comparative result in the temperature difference comparing unit for the current temperature difference is current not less than described
Air-conditioning is controlled to shut down during the first temperature difference threshold, in the current temperature difference less than current first temperature difference threshold but not less than the
Two temperature difference thresholds, the operating current to compressor of air conditioner is adjusted so that the current temperature difference is less than current first temperature
Difference limen value.
8. system according to claim 7, it is characterised in that the system also includes：
Alarm signal and/or cue output unit, for warm not less than described current first at least in the current temperature difference
When difference limen value and the current temperature difference are less than current first temperature difference threshold but not less than second temperature difference threshold, control
The cue of air-conditioning output alarm signal and/or the prompting current power supply temperature.
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