CN107062521A - Convertible frequency air-conditioner fire prevention control method - Google Patents
Convertible frequency air-conditioner fire prevention control method Download PDFInfo
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- CN107062521A CN107062521A CN201710055998.9A CN201710055998A CN107062521A CN 107062521 A CN107062521 A CN 107062521A CN 201710055998 A CN201710055998 A CN 201710055998A CN 107062521 A CN107062521 A CN 107062521A
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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
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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
- F24F11/70—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
- 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
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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
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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
- 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
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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
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of convertible 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 as current power supply temperature, obtain in real time air-conditioning temperature indoors be used 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 given threshold；If the current temperature difference is not less than the first given threshold, control air-conditioning is shut down；If the current temperature difference is less than first given threshold but not less than the second given threshold, the rotating speed of operating current and air-conditioning draught fan to compressor of air conditioner is adjusted so that the current temperature difference is less than first given 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
It is to be related to convertible 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 in work running, often in the presence of because
For electric current it is excessive or electric leakage etc. reason cause circuit structure temperature is too high to generate heat, fire incident can occur when serious, sky is burnt
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 that temperature protection is set 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
In the change for the power network current powered for air-conditioning, and control box, inside air-conditioning, 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 factor such as of short duration rise of the caused electric-controlled box temperature of outer interference, control is empty
Straightening, which 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 convertible 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 convertible 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 as current power supply temperature, obtains empty in real time
Adjust temperature indoors be used 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 given threshold；
If the current temperature difference is not less than the first given threshold, control air-conditioning is shut down；
If the current temperature difference is less than first given threshold but not less than the second given threshold, to the work of compressor of air conditioner
The rotating speed for making electric current and air-conditioning draught fan is adjusted so that the current temperature difference is less than first given threshold.
Compared with prior art, advantages and positive effects of the present invention are：Convertible frequency air-conditioner fire prevention control proposed by the present invention
In method and control system, 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 performs different controls to air-conditioning, when the temperature difference is more than the first given threshold, shows that power supply temperature is too high, 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 not less than the
Two given thresholds but during less than the first given threshold, show that power supply temperature is higher, now, empty but without shutdown temperature is reached
Tune, which is not shut down, to work on, however, it is desirable to which the rotating speed of the operating current and air-conditioning draught fan to compressor of air conditioner is adjusted, makes
Obtain power supply temperature to be under shutdown temperature, continuing adjustment indoor temperature, guarantee indoor temperature as far as possible in air-conditioning adjusts comfortable
Property while avoid power supply temperature too high and occur firing accident, realize the prevention in advance and control caught fire to high temperature.Moreover, base
The temperature difference between the power supply temperature and environment temperature of the air conditioner power source plug inside of detection is as judging parameter, on the one hand, empty
The change that the temperature inside attaching plug is direct, rapidly follow the power network current powered for air-conditioning is adjusted, only by environment temperature
Interference；On the other hand, influence of the environment temperature to power supply temperature can be excluded again, thus, judge parameter it is more reliable, stably,
Accurately.Thus, can be on the basis of air-conditioner temperature regulation comfortableness be taken into account using the control method and control system of the present invention
Improve the accuracy and reliability of fire prevention control.
After the embodiment that the present 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 convertible frequency air-conditioner of the present invention fire prevention control method one embodiment；
Fig. 2 is the flow chart based on convertible frequency air-conditioner of the present invention fire prevention control method one embodiment；
Fig. 3 is the flow chart based on convertible frequency air-conditioner of the present invention fire prevention the 3rd embodiment of control method.
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 of control method one embodiment of being prevented fires based on convertible frequency air-conditioner of the present invention
Figure.
As schematically shown in Figure 1, the embodiment realizes that the method for convertible frequency air-conditioner fire prevention control uses 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 be used 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 by setting temperature detection part to realize 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, will not be by air conditioner main body
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 and limit herein.
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 given 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 given threshold, and makees corresponding control to air-conditioning according to comparative result.
Wherein, given threshold refers to temperature given threshold, is temperature value that is known, pre-setting, and can be by awarding
Weigh and changed.Given threshold can be that a threshold value or multiple threshold values, in this embodiment, given threshold include two,
Respectively the first given threshold and the second given threshold, the first given threshold are more than the second given threshold.First given threshold is
The maximum temperature threshold value that air-conditioning can be remained on, is also to be easy to that a temperature threshold of fire can be produced；Second setting threshold
Value is that air-conditioning can run but exist a temperature threshold for producing fire hazard.
Step 103：If the current temperature difference is not less than the first given threshold, control air-conditioning is shut down；If the current temperature difference is less than first
Given threshold but not less than the second given threshold, the rotating speed of operating current and air-conditioning draught fan to compressor of air conditioner is adjusted,
So that the current temperature difference is less than the first given threshold.
The step be according to the current temperature difference in step 102 with the comparative result of given threshold is corresponding to air-conditioning work controls
Process.Specifically, if the current temperature difference is not less than the first given threshold, show under current indoor environment temperature, it is current to supply
Electro-temperature is too high, reaches the max-thresholds of fire prevention control, namely reaches shutdown temperature, control air-conditioning is directly shut down, it is to avoid empty
Tune continue to run with and so that power supply temperature further rise and produce fire incident.Although if the current temperature difference is less than the first setting
Threshold value, not less than the second given threshold, although showing that current power supply temperature is also not up to shutdown temperature, but temperature
It is higher, if not making further regulation and control, it is likely that can cause power supply temperature further to raise yet and reach shutdown temperature.For
Such case, it is contemplated that the use of the purpose of air-conditioning is regulation indoor temperature, obtains more comfortable environment, in this case, air-conditioning
Do not shut down and work on, however, it is desirable to the rotating speed of the operating current and indoor fan to compressor of air conditioner is adjusted, and adjustment
Target be so that the current temperature difference be less than the first given threshold.That is, being used as control less than the first given threshold using the current temperature difference
Target, is adjusted to the rotating speed of compressor operating electric current and indoor fan.Compressor operating curent change, air conditioner load change,
Power supply temperature can also be followed and changed；Rotation speed of fan changes, and air conditioner load change, power supply temperature can also be followed and changed.
So as to by the adjustment and the adjustment of rotation speed of fan to compressor operating electric current, reach the current temperature difference not less than the first setting threshold
The adjustment target of value.
Fig. 2 is referred to, the figure show the flow of control method one embodiment of being prevented fires based on convertible frequency air-conditioner of the present invention
Figure, is the flow chart that the one embodiment for realizing fire prevention control is adjusted to compressor operating electric current specifically.
As schematically shown in Figure 2, the embodiment realizes that the method for convertible frequency air-conditioner fire prevention control uses 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 be used 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 given 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 the first given threshold.If so, performing step 205；If it is not, performing step
204。
Similar with Fig. 1 embodiments, in Fig. 2 embodiments, given threshold also includes the first given threshold and second
Given threshold, the implication of the two given thresholds and effect are similar with Fig. 1 embodiments.In the step 203, judgment step 202
Whether the current temperature difference obtained is less than the first given threshold, and performs step 204 or step 205 according to judged result.
Step 204：Air-conditioning is controlled to shut down.
If step 203 judges that the current temperature difference is not less than the first given 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, kept away
Exempt from air-conditioning continue to run with and so that power supply temperature further rise and produce fire incident.
Step 205：Whether the current temperature difference is less than the second given threshold.If so, performing step 206；Otherwise, step is gone to
207。
If step 203 judges that the current temperature difference is less than the first given threshold, determine whether whether the current temperature difference is less than the
Two given thresholds, and step 206 or step 207 are performed according to judged result.
Step 206：Mineral wool is not controlled.
If step 205 judges that the current temperature difference is less than the second given threshold, show that current power supply temperature is normal, be not in
Fire risk.In the case, to air-conditioning, mineral wool is not controlled, but controls air-conditioning work according to normal control process.
Step 207：The current working current of compressor is obtained, reduction current working current obtains real work electric current, pressed
According to the facts border operating current control compressor of air conditioner operation.
If step 205 judges that the current temperature difference is not less than the second given 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 power supply temperature further to rise
It is high and reach shutdown temperature.In this case, air-conditioning is not shut down and 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 the first given threshold.Tool
It is the current working current for obtaining compressor for body, then, reduction current working current obtains real work electric current, according to
Real work current control compressor of air conditioner is run.
As the presently preferred embodiments, the current working current of compressor is obtained, reduction current working current obtains real work
Electric current, is specifically included：
The current working current of compressor is obtained, real work electric current is obtained according to the following equation：
Real work electric current=a1* current working currents-b；
Wherein, coefficient a1 is no more than 1 positive number, and b is more than 0.
It is preferred that, coefficient a1 span 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 given threshold again.
Real work electric current, control compressor of air conditioner after step 207 is reduced are run according to real work electric current
During, the temperature difference for continuing to obtain between current power supply temperature and current indoor environment temperature is used as the current temperature difference.Then, will
The current temperature difference is made comparisons with the preceding temperature difference once obtained, and performs step 209 or step 205 according to comparative result selection.Wherein,
The preceding temperature difference once obtained 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 goes to step 205, and continuation sets the current temperature difference with second
Determine threshold value to make comparisons.If the current temperature difference continues executing with step 207, it is necessary to reduce again still not less than the second given threshold
Compressor real work electric current, until compressor operating electric current is reduced to zero and stopped.
Step 209：Keep real work electric current constant.
If step 208 judges that the current temperature difference is less than a preceding temperature difference, show after reduction compressor operating electric current, supply
Electro-temperature has declined, then keeps 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 obtain current power supply temperature and current according to setting sample frequency
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 given threshold
Reason process.
Fig. 3 is referred to, the figure show the flow for the 3rd embodiment of control method of being prevented fires based on convertible frequency air-conditioner of the present invention
Figure, is the flow chart that the one embodiment for realizing fire prevention control is adjusted to the rotating speed of air-conditioning draught fan specifically.
As schematically shown in Figure 3, the embodiment realizes that the method for convertible frequency air-conditioner fire prevention control uses the process with following step
To realize：
Step 301：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 be used as current indoor environment temperature.
Step 302：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 given 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 303：Whether the current temperature difference is less than the first given threshold.If so, performing step 305；If it is not, performing step
304。
Similar with Fig. 1 embodiments, in Fig. 3 embodiments, given threshold also includes the first given threshold and second
Given threshold, the implication of the two given thresholds and effect are similar with Fig. 1 embodiments.In the step 303, judgment step 302
Whether the current temperature difference obtained is less than the first given threshold, and performs step 304 or step 305 according to judged result.
Step 304：Air-conditioning is controlled to shut down.
If step 303 judges that the current temperature difference is not less than the first given 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, kept away
Exempt from air-conditioning continue to run with and so that power supply temperature further rise and produce fire incident.
Step 305：Whether the current temperature difference is less than the second given threshold.If so, performing step 306；Otherwise, step is gone to
307。
If step 303 judges that the current temperature difference is less than the first given threshold, determine whether whether the current temperature difference is less than the
Two given thresholds, and step 306 or step 307 are performed according to judged result.
Step 306：Mineral wool is not controlled.
If step 305 judges that the current temperature difference is less than the second given threshold, show that current power supply temperature is normal, be not in
Fire risk.In the case, to air-conditioning, mineral wool is not controlled, but controls air-conditioning work according to normal control process.
Step 307：The current interior machine rotating speed of indoor fan is obtained, the current interior machine rotating speed of reduction obtains machine rotating speed in actual,
According to actual interior machine rotating speed control indoor fan operation.
If step 305 judges that the current temperature difference is not less than the second given 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 power supply temperature further to rise
It is high and reach shutdown temperature.In this case, air-conditioning is not shut down and 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 is less than the first setting threshold to the target that the rotating speed of indoor fan is adjusted
Value.Specifically, it is the current indoor rotating speed of acquisition indoor fan, then, reduction current indoor rotation speed of fan is obtained in actual
Machine rotating speed, according still further to actual interior machine rotating speed control indoor fan operation.For correspondence fixed frequency air conditioner, indoor fan is relation air-conditioning
The key factor of indoor heat exchange amount.Indoor fan rotating speed is reduced, heat exchange amount is reduced, and air conditioner load is reduced, and power supply temperature also can
Decline is followed, so as to reach that the current temperature difference is not less than the adjustment mesh of the first given threshold by the adjustment to indoor fan rotating speed
Mark.
As the presently preferred embodiments, the current interior machine rotating speed of indoor fan is obtained, the current interior machine rotating speed of reduction is obtained in actual
Machine rotating speed, is specifically included：
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-a2 in actual；
Wherein, a2 is more than 0.
Step 308：Whether the current temperature difference is less than a preceding temperature difference.If so, performing step 309；If it is not, going to step 310.
Actual interior machine rotating speed, control air-conditioning indoor fan after step 307 is reduced are transported according to actual interior machine rotating speed
In capable process, the temperature difference for continuing to obtain between current power supply temperature and current indoor environment temperature is used as the current temperature difference.Then,
The current temperature difference is made comparisons with the preceding temperature difference once obtained, and step 309 or step 310 are performed according to comparative result selection.Its
In, the preceding temperature difference once obtained refers to the temperature difference between previous power supply temperature and previous indoor environment temperature.
Step 309：Keep machine wind speed in actual constant.
If step 308 judges that the current temperature difference is less than a preceding temperature difference, show after reduction indoor fan rotating speed, power supply
Temperature has declined, then keeps the actual interior machine wind speed corresponding to the current temperature difference constant, no longer reduce indoor fan wind speed.
Step 310：Judge whether machine rotating speed is more than machine rotary speed threshold value in setting in actual.If so, going to step 305；It is no
Then, step 311 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 308 judges that the current temperature difference is not less than a preceding temperature difference, show after reduction indoor fan rotating speed, power supply temperature is simultaneously
Do not 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 are also higher than the minimum speed value that indoor fan is allowed, then go to step 305,
Continue to say that the current temperature difference is made comparisons with the second given threshold.If the current temperature difference continues to hold still not less than the second given threshold
Row step 307, it is necessary to reduce indoor fan rotating speed, until indoor fan rotating speed, which is reduced to, no more than sets interior machine rotating speed threshold again
Value.
Step 311：The rotating speed of outdoor fan of air-conditioner is adjusted so that the current temperature difference is less than the first given threshold.
If step 310 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 the first given threshold.
The concrete methods of realizing being adjusted to the rotating speed of outdoor fan of air-conditioner, can be divided into outdoor fan adjustable for wind speed
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 of outdoor fan of air-conditioner is adjusted so that current temperature
Difference is less than the first given threshold, specifically includes：
The current outer machine rotating speed of outdoor fan is obtained, the current outer machine rotating speed of reduction obtains actual outer machine rotating speed；
According to actual outer machine rotating speed control indoor fan operation.
Also, in some other embodiment, in outdoor fan running is controlled according to actual outer machine rotating speed, 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 taken is made comparisons；Wherein, the preceding temperature difference once obtained is still 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 once obtained, continue according to actual outer machine rotating speed control indoor fan operation；
And if the current temperature difference continues to reduce actual outer machine rotating speed not less than the preceding temperature difference once obtained, until outer machine rotating speed is 0, outside
Machine is shut down.
If outdoor fan is the nonadjustable AC blower fan of wind speed, the rotating speed of outdoor fan of air-conditioner is adjusted, taken
Outdoor fan runs the discontinuity opening ways operation that a period of time is shut down after a period of time, reaches and is equal to change tachometer value
Purpose.Specifically, the rotating speed of outdoor fan of air-conditioner is adjusted so that the current temperature difference is less than the first given threshold, specifically
Including：
Control outdoor fan reached and run again after 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 some other embodiments, shut down, stop after control outdoor fan is according to operation current run time
During the machine time reaches that the discontinuity mode run again after current downtime is run, continue to obtain current power supply temperature
The temperature difference between current indoor environment temperature makes comparisons the current temperature difference with the preceding temperature difference once obtained as the current temperature difference；
The preceding temperature difference once obtained is still 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 once obtained, after continuing to control outdoor fan according to operation current run time
Shut down, downtime reaches that the discontinuity mode run again after current downtime is run；And if before the current temperature difference is not less than
The temperature difference once obtained, 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, increasing the method for downtime
To the purpose for being equal to reduction outdoor fan rotating speed.Then, control outdoor fan is according to shutting down, stop after operation actual run time
The machine time reaches that the discontinuity mode run again after actual downtime is run.
However, it is to be understood that during step 306 not mineral wool control air-conditioning and step 309 keeps real
In border during machine rotating speed invariance control air-conditioning, it is still desirable to obtain current power supply temperature and current according to setting sample frequency
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 given threshold
Reason process.
In some other embodiment, the compressor operating current flow control process of above-mentioned second embodiment of Fig. 2 with it is above-mentioned
The rotation speed of fan control process of the 3rd embodiment of Fig. 3 can be carried out simultaneously.
In some other embodiment, at least it is less than first not less than the first given threshold and the current temperature difference in the current temperature difference
Given threshold but during not less than the second given threshold, control air-conditioning output alarm signal and/or points out current power supply temperature to carry
Show signal.For example, the output of control air-conditioning characterizes the current temperature difference or the too high or higher alarm signal of current power supply temperature, and passes through
Acoustic-optic alarm sends sound and light alarm；Or, control air-conditioning exports the current temperature difference or current power supply temperature and current indoor
The cue of environment temperature, and shown by display screen, to point out 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 or Fig. 3 embodiments, is detected
The power supply temperature of air conditioner power source plug inside, is performed not according to the size of the temperature difference between power supply temperature and environment temperature to air-conditioning
Same control, when the temperature difference is more than the first given threshold, shows that power supply temperature is too high, reaches shutdown temperature, then control air-conditioning straight
Connect shutdown, it is to avoid air-conditioning works on and produces Fire Overheat accident；In the temperature difference not less than the second given threshold but less than first
During given threshold, show that power supply temperature is higher, but without shutdown temperature is reached, now, air-conditioning is not shut down and worked on, but
It is, it is necessary to which the rotating speed of the operating current and air-conditioning draught fan to compressor of air conditioner is adjusted so that power supply temperature, which is in, shuts down
Under temperature, power supply temperature is avoided while air-conditioning continues and adjusts indoor temperature, guarantee indoor temperature regulation comfortableness as far as possible
Spend high and occur firing accident, realize the prevention in advance and control caught fire to high temperature.Moreover, the air conditioner power source based on detection is inserted
The temperature difference between power supply temperature and environment temperature inside head is as judging parameter, on the one hand, the temperature of air conditioner power source plug inside
Change that is direct, rapidly following the power network current powered for air-conditioning is spent, is only disturbed by environment temperature；On the other hand, again
Influence of the environment temperature to power supply temperature can be excluded, thus, judges that parameter is more reliable, stably, accurately.Thus, using this hair
Bright control method and control system, can improve the accurate of fire prevention control on the basis of air-conditioner temperature regulation comfortableness is taken into account
Property and reliability.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although with reference to foregoing reality
Apply example the present invention is described in detail, for the person of ordinary skill of the art, can still implement to foregoing
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these are changed or replaced
Change, the essence of appropriate technical solution is departed from the spirit and scope of claimed technical solution of the invention.
Claims (13)
- The control method 1. a kind of convertible frequency air-conditioner is prevented fires, 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 as current power supply temperature, obtains empty in real time Adjust temperature indoors be used 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 given threshold；If the current temperature difference is not less than the first given threshold, control air-conditioning is shut down；If the current temperature difference is less than first given threshold but not less than the second given threshold, to the work of compressor of air conditioner The rotating speed for making electric current and air-conditioning draught fan is adjusted so that the current temperature difference is less than first given threshold.
- 2. according to the method described in 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 first given threshold, specifically include：The current working current of compressor is obtained, the current working current is reduced and obtains real work electric current；Run according to the real work current control compressor of air conditioner.
- 3. method according to claim 2, 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 once obtained；The preceding temperature difference once obtained is previous power supply temperature The temperature difference between degree and previous indoor environment temperature；If the current temperature difference is less than the preceding temperature difference once obtained, continue according to the real work current control air-conditioning pressure Contracting machine is run；If the current temperature difference is not less than the preceding temperature difference once obtained, again by the current temperature difference and the described first setting Threshold value and second given threshold are made comparisons, and the control of air-conditioning is performed according to comparative result.
- 4. method according to claim 2, 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=a1* current working currents-b；Wherein, coefficient a1 is no more than 1 positive number, and b is more than 0.
- 5. method according to any one of claim 1 to 4, it is characterised in that the rotating speed to air-conditioning draught fan is carried out Adjustment so that the current temperature difference is less than first given threshold, specifically includes：The current interior machine rotating speed of indoor fan is obtained, the current interior machine rotating speed is reduced and obtains machine rotating speed in actual；According to machine rotating speed control indoor fan operation in the reality.
- 6. method according to claim 5, it is characterised in that the current interior machine rotating speed of the acquisition indoor fan, reduction 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-a2 in actual；Wherein, a2 is more than 0.
- 7. method according to claim 5, it is characterised in that the machine rotating speed control indoor fan fortune according to the reality In capable process, the temperature difference for continuing to obtain between the current power supply temperature and the current indoor environment temperature is used as current temperature Difference, the current temperature difference is made comparisons with the preceding temperature difference once obtained；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 be less than it is described before the temperature difference that once obtains, continue according to wind in machine rotating speed control room in the reality Machine is run.
- 8. method according to claim 7, it is characterised in that if the current temperature difference is not less than once obtaining before described The temperature difference, judges 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, the current temperature difference is set with described first again Determine threshold value and second given threshold is made comparisons, 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 of outdoor fan of air-conditioner is adjusted It is whole so that the current temperature difference is less than first given threshold.
- 9. method according to claim 8, it is characterised in that the rotating speed to outdoor fan of air-conditioner is adjusted, and is made Obtain the current temperature difference and be less than first given threshold, specifically include：The current outer machine rotating speed of outdoor fan is obtained, the current outer machine rotating speed is reduced and obtains actual outer machine rotating speed；According to machine rotating speed control indoor fan operation outside the reality.
- 10. method according to claim 9, it is characterised in that machine rotating speed controls outdoor fan outside according to the reality In running, the temperature difference for continuing to obtain between the current power supply temperature and the current indoor environment temperature is used as current temperature Difference, the current temperature difference is made comparisons with the preceding temperature difference once obtained；The preceding temperature difference once obtained is previous power supply temperature With the temperature difference between previous indoor environment temperature；If the current temperature difference be less than it is described before the temperature difference that once obtains, continue according to wind in machine rotating speed control room outside the reality Machine is run；If the current temperature difference is not less than the preceding temperature difference once obtained, continue to reduce the outer machine rotating speed of the reality.
- 11. method according to claim 8, it is characterised in that the rotating speed to outdoor fan of air-conditioner is adjusted, and is made Obtain the current temperature difference and be less than first given threshold, specifically include：Control outdoor fan reached and run again after current downtime according to shutdown, downtime after operation current run time Discontinuity mode run.
- 12. method according to claim 11, it is characterised in that in control outdoor fan according to the operation current operation Shut down after time, during downtime reaches that the discontinuity mode run again after the current downtime is run, after The continuous temperature difference obtained between the current power supply temperature and the current indoor environment temperature, will be described current as the current temperature difference The temperature difference is made comparisons with the preceding temperature difference once obtained；The preceding temperature difference once obtained 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 once obtained, continue to control outdoor fan according to the operation current fortune Shut down after the row time, downtime reaches that the discontinuity mode run again after the current downtime is run；If the current temperature difference reduces the current run time and is used as actual motion not less than the preceding temperature difference once obtained Time, increase current downtime as actual downtime, when control outdoor fan is according to the actual motion is run Between after shut down, downtime reach that the discontinuity mode run again after the actual downtime is run.
- 13. according to the method described in claim 1, it is characterised in that at least set in the current temperature difference not less than described first Determine threshold value and the current temperature difference and be less than first given threshold but during not less than second given threshold, control air-conditioning The cue of output alarm signal and/or the prompting current power supply temperature.
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| CN201710055998.9A CN107062521A (en) | 2017-01-25 | 2017-01-25 | Convertible frequency air-conditioner fire prevention control method |
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| CN201710055998.9A CN107062521A (en) | 2017-01-25 | 2017-01-25 | Convertible frequency air-conditioner fire prevention control method |
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| CN112032968A (en) * | 2020-08-27 | 2020-12-04 | 海信（山东）空调有限公司 | Air conditioner, method of controlling the same, and computer-readable storage medium |
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