CN106705382A - Fire prevention control method for fixed-frequency air conditioner - Google Patents
Fire prevention control method for fixed-frequency air conditioner Download PDFInfo
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- CN106705382A CN106705382A CN201710056012.XA CN201710056012A CN106705382A CN 106705382 A CN106705382 A CN 106705382A CN 201710056012 A CN201710056012 A CN 201710056012A CN 106705382 A CN106705382 A CN 106705382A
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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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- 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
- F24F11/62—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
-
- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The method discloses a fire prevention control method for a fixed-frequency air conditioner. The method comprises the steps that when the air conditioner operates, the temperature in a power plug of the air conditioner is obtained in real time and serves as the current power supply temperature, and the temperature of a room where the air conditioner is located is obtained in real time and serves as the current indoor environment temperature; the temperature difference between the current power supply temperature and the current indoor environment temperature is obtained and serves as the current temperature difference, and the current temperature difference is compared with the temperature difference threshold value; if the current temperature difference is not smaller than the current first temperature difference threshold value, the air conditioner is controlled to stop operating; if the current temperature difference is smaller than the current first temperature difference threshold value, but not smaller than the second temperature difference threshold value, the rotation speed of the air conditioner is adjusted, and the current temperature difference is made to be smaller than the current first temperature difference threshold value; and when the current first temperature difference threshold value is in positive correlation with the service life of the air conditioner, and the current first temperature difference threshold value is determined according to the service life of the air conditioner. By the adoption of the fire prevention control method, the accuracy and reliability of fire prevention control can be improved on the basis of considering the air conditioner temperature adjusting comfort.
Description
Technical field
It is to be related to a kind of fixed frequency air conditioner fire prevention control method specifically the invention belongs to air conditioner controlling technology field.
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 fixed frequency air conditioner fire prevention control method, air-conditioner temperature regulation comfortableness is being taken into account
On the basis of improve fire prevention control accuracy and reliability.
For achieving the above object, the method that the present invention is provided is achieved using following technical proposals：
A kind of fixed frequency air conditioner fire prevention control method, 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 air-conditioning draught fan
Rotating speed is adjusted so that the current temperature difference is 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 rotating speed to air-conditioning draught fan is adjusted so that the current temperature difference is less than described
Current first temperature difference threshold, specifically includes：
The current interior machine rotating speed of indoor fan is obtained, the current interior machine rotating speed is reduced and is obtained machine rotating speed in actual；
Run according to machine rotating speed control indoor fan in the reality.
Preferably, the current interior machine rotating speed for obtaining indoor fan, reduces the current interior machine rotating speed and obtains in actual
Machine rotating speed, specifically includes：
The current interior machine rotating speed of indoor fan is obtained, machine rotating speed in actual is obtained according to the following equation：
Machine rotating speed=current interior machine rotating speed-a in actual；
Wherein, a is more than 0.
Method as described above, during machine rotating speed control indoor fan runs according to the reality, continues to obtain
The temperature difference between the current power supply temperature and the current indoor environment temperature is taken as the current temperature difference, by the current temperature difference
Made comparisons with the preceding temperature difference for once obtaining；The temperature difference once obtained before described is previous power supply temperature and previous interior
The temperature difference between environment temperature；
If the current temperature difference continues according to wind in machine rotating speed control room in the reality less than the preceding temperature difference for once obtaining
Machine runs.
Method as described above, if the current temperature difference judges the reality not less than the preceding temperature difference for once obtaining
Whether interior machine rotating speed is more than machine rotary speed threshold value in setting；
If machine rotating speed is more than machine rotary speed threshold value in the setting in the reality, again by the current temperature difference and described current the
One temperature difference threshold and second temperature difference threshold are made comparisons, and the control of air-conditioning is performed according to comparative result；
If machine rotating speed is not more than machine rotary speed threshold value in the setting in the reality, the rotating speed to outdoor fan of air-conditioner is adjusted
It is whole so that the current temperature difference is less than current first temperature difference threshold.
Method as described above, if outdoor fan is DC fan, the rotating speed to outdoor fan of air-conditioner is adjusted,
So that the current temperature difference is less than current first temperature difference threshold, can specifically include：
The current outer machine rotating speed of outdoor fan is obtained, the current outer machine rotating speed is reduced and is obtained actual outer machine rotating speed；
Run according to the outer machine rotating speed control indoor fan of the reality.
Method as described above, according to the outer machine rotating speed control outdoor fan running of the reality, continues to obtain
The temperature difference between the current power supply temperature and the current indoor environment temperature as the current temperature difference, by the current temperature difference with
The preceding temperature difference for once obtaining is made comparisons；The preceding temperature difference for once obtaining is previous power supply temperature and previous indoor environment temperature
The temperature difference between degree；
If the current temperature difference is less than the preceding temperature difference for once obtaining, continue according to wind in the outer machine rotating speed control room of the reality
Machine runs；
If the current temperature difference is not less than the preceding temperature difference for once obtaining, continue to reduce the outer machine rotating speed of the reality.
Method as described above, if outdoor fan is AC blower fan, the rotating speed to outdoor fan of air-conditioner is adjusted,
So that the current temperature difference is less than current first temperature difference threshold, can specifically include：
Control outdoor fan runs again after reaching current downtime according to shutdown, downtime after operation current run time
Discontinuity mode run.
Method as described above, in control outdoor fan according to shutdown, downtime after running the current run time
Reach during the discontinuity mode run again after the current downtime runs, continue to obtain the current power supply temperature
Spend and the temperature difference between the current indoor environment temperature is used as the current temperature difference, by the current temperature difference and the preceding temperature for once obtaining
Difference is made comparisons；The preceding temperature difference that once obtains is the temperature difference between previous power supply temperature and previous indoor environment temperature；
If the current temperature difference is less than the preceding temperature difference for once obtaining, continue to control outdoor fan according to the operation current fortune
Shut down after the row time, downtime reaches the discontinuity mode run again after the current downtime and runs；
If the current temperature difference reduces the current run time as actual motion not less than the preceding temperature difference for once obtaining
Time, increase current downtime as actual downtime, when control outdoor fan is according to the actual motion is run
Between after shut down, downtime reaches the discontinuity mode run again after the actual downtime and runs.
Compared with prior art, advantages and positive effects of the present invention are：Fixed frequency air conditioner fire prevention control proposed by the present invention
In method, the power supply temperature of air conditioner power source plug inside is detected, according to the size of the temperature difference between power supply temperature and environment temperature
Different controls are performed to air-conditioning, when the temperature difference is more than current first temperature difference threshold, shows that power supply temperature is too high, reach shutdown temperature
Degree, then control air-conditioning directly to shut down, it is to avoid air-conditioning works on and produces Fire Overheat accident；It is not less than second temperature difference in the temperature difference
Threshold value but during less than current first temperature difference threshold, shows that power supply temperature is higher, but without reaching shutdown temperature, now, air-conditioning
Do not shut down and work on, however, it is desirable to be adjusted to the rotating speed of air-conditioning draught fan so that power supply temperature be in shutdown temperature it
Under, avoid power supply temperature too high while air-conditioning continues and adjusts indoor temperature, guarantee indoor temperature regulation comfortableness as far as possible
And there is firing accident, prevention in advance and control that realization is 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 the variable thresholding that air-conditioning service life is dynamically determined, more meet air-conditioning reality
Use state, it is to avoid because of the generation of the problem that unreliable or temperature adjustment performance of being prevented fires caused by erroneous judgement declines.Additionally, based on inspection
The temperature difference between the power supply temperature and environment temperature of the air conditioner power source plug inside of survey is used as judging parameter, on the one hand, air conditioner electric
The temperature of source plug inside directly, rapidly follows the change of the power network current powered for air-conditioning, is only done by environment temperature
Disturb；On the other hand, influence of the environment temperature to power supply temperature can be excluded again, thus, judge that parameter is more reliable, stable, accurate.
Thus, using control method of the invention, fire prevention control can be improved on the basis of air-conditioner temperature regulation comfortableness is taken into account
Accuracy and reliability.
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 based on fixed frequency air conditioner of the present invention fire prevention control method one embodiment；
Fig. 2 is the flow chart based on another embodiment of fixed frequency air conditioner of the present invention fire prevention control method.
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 fixed frequency air conditioner of the present invention.
As schematically shown in Figure 1, the embodiment realizes the method for fixed 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 rotating speed to air-conditioning draught fan is adjusted so that the current temperature difference is small
In 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 rotating speed of air-conditioning draught fan is adjusted, and the target of adjustment 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 targe,
Rotating speed to blower fan is adjusted.Rotation speed of fan changes, and air conditioner load change, power supply temperature can also be followed and changed, so that logical
Cross and adjustment target of the current temperature difference not less than current first temperature difference threshold is reached to the adjustment of rotation speed of fan.
Fig. 2 is referred to, the figure show the flow based on another embodiment of fixed frequency air conditioner of the present invention fire prevention control method
Figure.
As schematically shown in Figure 2, the embodiment realizes the method for fixed 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 interior machine rotating speed of indoor fan is obtained, machine rotating speed in current is reduced and is obtained machine rotating speed in actual,
Run according to actual interior machine rotating speed control indoor fan.
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 turn to air-conditioning indoor fan
Speed is adjusted.Also, still it is so that the current temperature difference less than the current first temperature to the target that the rotating speed of indoor fan is adjusted
Difference limen value.Specifically, it is the current indoor rotating speed of acquisition indoor fan, then, reduces current indoor rotation speed of fan and obtain real
Machine rotating speed in border, according still further to actual interior machine rotating speed control indoor fan operation.For correspondence fixed frequency air conditioner, indoor fan is relation
The key factor of heat exchange amount in air conditioning chamber.Indoor fan rotating speed is reduced, heat exchange amount is reduced, and air conditioner load is reduced, power supply temperature
Also decline can be followed, so as to reach the current temperature difference not less than current first temperature difference threshold by the adjustment to indoor fan rotating speed
Adjustment target.
As the presently preferred embodiments, the current interior machine rotating speed of indoor fan is obtained, machine rotating speed in current is reduced and is obtained in actual
Machine rotating speed, specifically includes：
The current interior machine rotating speed of indoor fan is obtained, machine rotating speed in actual is obtained according to the following equation：
Machine rotating speed=current interior machine rotating speed-a in actual；
Wherein, a is more than 0.
Step 208：Whether the current temperature difference is less than a preceding temperature difference.If so, performing step 209；If it is not, going to step 210.
Actual interior machine rotating speed, control air-conditioning indoor fan after step 207 is reduced are transported according to actual interior machine rotating speed
In capable process, continue to obtain the temperature difference between current power supply temperature and current indoor environment temperature as the current temperature difference.Then,
The current temperature difference is made comparisons with the preceding temperature difference for once obtaining, and step 209 or step 210 are performed according to comparative result selection.Its
In, the preceding temperature difference that once obtains refers to the temperature difference between previous power supply temperature and previous indoor environment temperature.
Step 209：Keep machine wind speed in actual constant.
If step 208 judges that the current temperature difference, less than a preceding temperature difference, shows after indoor fan rotating speed is reduced, power supply
Temperature has declined, then keep the actual interior machine wind speed corresponding to the current temperature difference constant, no longer reduces indoor fan wind speed.
Step 210：Judge that whether machine rotating speed is more than machine rotary speed threshold value in setting in actual.If so, going to step 205；It is no
Then, step 211 is performed.
Machine rotary speed threshold value is a default known speed value in setting, is the minimum speed value that indoor fan is allowed.
If step 208 judges that the current temperature difference not less than a preceding temperature difference, shows after indoor fan rotating speed is reduced that power supply temperature is simultaneously
Without decline.Then, machine rotating speed is made comparisons with machine rotary speed threshold value in setting in will be actual.If machine rotating speed is more than setting in actual
Interior machine rotary speed threshold value, namely actual interior machine rotating speed is also higher than the minimum speed value that indoor fan is allowed, then go to step 205,
The current temperature difference is made comparisons in continuation with the second temperature difference threshold.If the current temperature difference continues to hold still not less than the second temperature difference threshold
Row step 207, it is necessary to reduce indoor fan rotating speed again, until indoor fan rotating speed be reduced to no more than set in machine rotating speed threshold
Value.
Step 211：Rotating speed to outdoor fan of air-conditioner is adjusted so that the current temperature difference is less than current first temperature difference threshold
Value.
If step 210 judges that machine rotating speed is not more than machine rotary speed threshold value in setting in actual, reaches the indoor fan of permission
Minimum speed value, it is impossible to reduce indoor fan rotating speed again.But, because now the current temperature difference is not less than a preceding temperature difference, also need
Proceed control of preventing fires.So, take and the rotating speed of outdoor fan of air-conditioner is adjusted, and adjustment target is still for so that work as
The preceding temperature difference is less than current first temperature difference threshold.
The concrete methods of realizing being adjusted to the rotating speed of outdoor fan of air-conditioner, can be divided into outdoor fan for wind speed is adjustable
Method of adjustment during nonadjustable for the wind speed AC blower fan of method of adjustment and outdoor fan during DC fan.Specific method is described in detail
It is as follows：
If outdoor fan is the adjustable DC fan of wind speed, the rotating speed to outdoor fan of air-conditioner is adjusted so that current temperature
Difference is less than current first temperature difference threshold, specifically includes：
The current outer machine rotating speed of outdoor fan is obtained, current outer machine rotating speed is reduced and is obtained actual outer machine rotating speed；
Run according to actual outer machine rotating speed control indoor fan.
Also, in some other embodiment, according to actual outer machine rotating speed control outdoor fan running, continue
The temperature difference between current power supply temperature and current indoor environment temperature is obtained as the current temperature difference, the current temperature difference is once obtained with preceding
The temperature difference for taking is made comparisons；Wherein, the preceding temperature difference for once obtaining still is previous power supply temperature and previous indoor environment temperature
The temperature difference between degree.
If the current temperature difference is less than the preceding temperature difference for once obtaining, continue to be run according to actual outer machine rotating speed control indoor fan；
And if the current temperature difference is not less than the preceding temperature difference for once obtaining, continue to reduce actual outer machine rotating speed, until outer machine rotating speed be 0, outward
Machine is shut down.
If outdoor fan is the nonadjustable AC blower fan of wind speed, the rotating speed to outdoor fan of air-conditioner is adjusted, takes
Outdoor fan shuts down the discontinuity opening ways operation of a period of time after operation a period of time, reach and be equal to change tachometer value
Purpose.Specifically, the rotating speed to outdoor fan of air-conditioner is adjusted so that the current temperature difference is less than current first temperature difference threshold,
Specifically include：
Control outdoor fan runs again after reaching current downtime according to shutdown, downtime after operation current run time
Discontinuity mode run.Current run time and current downtime are known time values, and can be repaiied by authorizing
Change.
Also, in other some embodiments, shut down after control outdoor fan is according to operation current run time, stopped
The machine time is reached during the discontinuity mode run again after current downtime runs, and continues to obtain current power supply temperature
With the temperature difference between current indoor environment temperature as the current temperature difference, the current temperature difference is made comparisons with the preceding temperature difference for once obtaining；
The preceding temperature difference for once obtaining still is the temperature difference between previous power supply temperature and previous indoor environment temperature.
If the current temperature difference is less than the preceding temperature difference for once obtaining, after continuing to control outdoor fan according to operation current run time
Shut down, downtime reaches the discontinuity mode run again after current downtime and runs；And if the current temperature difference is not less than preceding
The temperature difference for once obtaining, then need to reduce equivalent rotating speed again.Specifically, it is to reduce current run time as actual fortune
Row time, increase current downtime, as actual downtime, are reached by reducing run time, the method for increase downtime
To the purpose for being equal to reduction outdoor fan rotating speed.Then, control outdoor fan after operation actual run time according to shutting down, stop
The machine time reaches the discontinuity mode run again after actual downtime and runs.
However, it is to be understood that during step 206 not mineral wool control air-conditioning and step 209 keeps real
In border during machine rotating speed invariance control air-conditioning, 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 some other embodiment, 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 the current power supply of prompting
The cue of temperature.For example, control air-conditioning output characterizes the current temperature difference or the too high or higher alarm signal of current power supply temperature
Number, and sound and light alarm is sent by acoustic-optic alarm；Or, control air-conditioning export the current temperature difference or current power supply temperature and
The cue of current indoor environment temperature, and shown by display screen, pointed out with to current power supply temperature.
The control of fixed 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 rotating speed of air-conditioning draught fan so that power supply temperature is under shutdown temperature, continue to adjust indoor in air-conditioning
Temperature, as far as possible ensure indoor temperature regulation comfortableness while avoid power supply temperature too high and firing accident occur, it is right to realize
Prevention in advance and control that high temperature catches fire.And, current first temperature difference threshold is not fixed value, but with air-conditioning service life just
It is related, 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 erroneous judgement causes
The generation of problem that declines of the unreliable or temperature adjustment performance of fire prevention.Additionally, the air conditioner power source plug inside based on detection
The temperature difference between 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, it is fast
The change of the power network current powered for air-conditioning is followed fastly, is only disturbed by environment temperature；On the other hand, ring can be excluded again
Influence of the border temperature to power supply temperature, thus, judge that parameter is more reliable, stable, accurate.Thus, using controlling party of the invention
Method and control system, can improve the accuracy and reliability of fire prevention control on the basis of air-conditioner temperature regulation comfortableness is taken into account
Property.
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 (10)
1. a kind of fixed frequency air conditioner fire prevention control method, 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 air-conditioning draught fan
Rotating speed is adjusted so that the current temperature difference is 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 rotating speed to air-conditioning draught fan is adjusted so that institute
The current temperature difference is stated less than current first temperature difference threshold, is specifically included：
The current interior machine rotating speed of indoor fan is obtained, the current interior machine rotating speed is reduced and is obtained machine rotating speed in actual；
Run according to machine rotating speed control indoor fan in the reality.
4. method according to claim 3, it is characterised in that the current interior machine rotating speed of the acquisition indoor fan, reduces
The current interior machine rotating speed obtains machine rotating speed in actual, specifically includes：
The current interior machine rotating speed of indoor fan is obtained, machine rotating speed in actual is obtained according to the following equation：
Machine rotating speed=current interior machine rotating speed-a in actual；
Wherein, a is more than 0.
5. method according to claim 3, it is characterised in that the machine rotating speed control indoor fan fortune according to the reality
In capable process, continue to obtain the temperature difference between the current power supply temperature and the current indoor environment temperature as current temperature
Difference, the current temperature difference is made comparisons with the preceding temperature difference for once obtaining；The temperature difference once obtained before described is previous power supply
The temperature difference between temperature and previous indoor environment temperature；
If the current temperature difference continues according to wind in machine rotating speed control room in the reality less than the preceding temperature difference for once obtaining
Machine runs.
6. method according to claim 5, it is characterised in that if the current temperature difference is not less than once obtaining before described
The temperature difference, judges that whether machine rotating speed is more than machine rotary speed threshold value in setting in the reality；
If machine rotating speed is more than machine rotary speed threshold value in the setting in the reality, again by the current temperature difference and described current the
One temperature difference threshold and second temperature difference threshold are made comparisons, and the control of air-conditioning is performed according to comparative result；
If machine rotating speed is not more than machine rotary speed threshold value in the setting in the reality, the rotating speed to outdoor fan of air-conditioner is adjusted
It is whole so that the current temperature difference is less than current first temperature difference threshold.
7. method according to claim 6, it is characterised in that the rotating speed to outdoor fan of air-conditioner is adjusted, and makes
Obtain the current temperature difference and be less than current first temperature difference threshold, specifically include：
The current outer machine rotating speed of outdoor fan is obtained, the current outer machine rotating speed is reduced and is obtained actual outer machine rotating speed；
Run according to the outer machine rotating speed control indoor fan of the reality.
8. method according to claim 7, it is characterised in that transported according to the outer machine rotating speed control outdoor fan of the reality
During row, continue to obtain the temperature difference between the current power supply temperature and the current indoor environment temperature as current 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
With the temperature difference between previous indoor environment temperature；
If the current temperature difference is less than the preceding temperature difference for once obtaining, continue according to wind in the outer machine rotating speed control room of the reality
Machine runs；
If the current temperature difference is not less than the preceding temperature difference for once obtaining, continue to reduce the outer machine rotating speed of the reality.
9. method according to claim 6, it is characterised in that the rotating speed to outdoor fan of air-conditioner is adjusted, and makes
Obtain the current temperature difference and be less than current first temperature difference threshold, specifically include：
Control outdoor fan runs again after reaching current downtime according to shutdown, downtime after operation current run time
Discontinuity mode run.
10. method according to claim 9, it is characterised in that in control outdoor fan according to running the current operation
Shut down after time, downtime is reached during the discontinuity mode run again after the current downtime runs, after
The continuous temperature difference obtained between the current power supply temperature and the current indoor environment temperature, will be described current used as the current temperature difference
The 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 interior
The temperature difference between environment temperature；
If the current temperature difference is less than the preceding temperature difference for once obtaining, continue to control outdoor fan according to the operation current fortune
Shut down after the row time, downtime reaches the discontinuity mode run again after the current downtime and runs；
If the current temperature difference reduces the current run time as actual motion not less than the preceding temperature difference for once obtaining
Time, increase current downtime as actual downtime, when control outdoor fan is according to the actual motion is run
Between after shut down, downtime reaches the discontinuity mode run again after the actual downtime and runs.
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