Summary of the invention
Main purpose of the present invention is to provide a kind of control circuit of outdoor fan of air-conditioner, be intended to effectively solve the start and stop frequently during refrigerating operaton under low temperature environment of present air conditioner unit, cause refrigeration bad, can not better meet client's refrigeration demand under low temperature environment.
In order to realize goal of the invention, the invention provides a kind of control circuit of outdoor fan of air-conditioner, it comprises:
The outdoor environment temperature detecting unit is used for sensing chamber's external environment temperature value TempX when the air-conditioner outdoor fan turns round;
Condenser tube temperature detector measurement unit is used for sensing chamber's external condenser coil temperature value TempY when the air-conditioner outdoor fan turns round;
Main control unit, determine between the regulatory region of outdoor fan rotating speed according to outdoor environment temperature value TempX, and the initial gear value N1 of definite outdoor fan between regulatory region, compare according to outdoor condenser coil temperature value TempY and the reference temperature Temp1 and the Temp2 that preset, determine the adjustment of rotational speed gear value N2 in outdoor fan is between regulatory region, export corresponding rotary speed instruction to the blower fan driver element according to initial gear value N1 or adjustment gear value N2;
The blower fan driver element is used for driving the outdoor fan load according to described control instruction, to adjust outdoor fan by corresponding rotating speed operation.
Preferably, described main control unit also is used for controlling outdoor fan of air-conditioner when starting, and before detecting TempX, with preset rotation speed operation one preset time T 1, its span is 5-60 second.
Preferably, described main control unit also is used for controlling outdoor fan of air-conditioner and moved a preset time T 2 with current gear rotating speed before detecting TempY, and its span is 5-60 second.
Preferably, the scope of described Temp1 value is: 15 ℃-50 ℃, the scope of Temp2 value is: 15 ℃-50 ℃, and Temp2 Temp1.
Preferably, the span of Temp1 value and Temp2 value is 5 ℃≤Temp2-Temp1≤20 ℃;
Preferably, the control circuit of above-mentioned outdoor fan of air-conditioner also comprises:
Cross valve duty detecting unit, in order to the duty that detects the air-conditioner cross valve to determine the mode of operation of air-conditioner.
The present invention also provides a kind of air-conditioner, comprises outdoor condenser, outdoor fan, and it also comprises the control circuit of outdoor fan of air-conditioner.The control circuit of this outdoor fan of air-conditioner comprises:
The outdoor environment temperature detecting unit is used for sensing chamber's external environment temperature value TempX when the air-conditioner outdoor fan turns round;
Condenser tube temperature detector measurement unit is used for sensing chamber's external condenser coil temperature value TempY when the air-conditioner outdoor fan turns round;
Main control unit, determine between the regulatory region of outdoor fan rotating speed according to outdoor environment temperature value TempX, and the initial gear value N1 of definite outdoor fan between regulatory region, compare according to outdoor condenser coil temperature value TempY and the reference temperature Temp1 and the Temp2 that preset, determine the adjustment of rotational speed gear value N2 in outdoor fan is between regulatory region, export corresponding rotary speed instruction to the blower fan driver element according to initial gear value N1 or adjustment gear value N2;
The blower fan driver element is used for driving the outdoor fan load according to described control instruction, to adjust outdoor fan by corresponding rotating speed operation.
The present invention also provides a kind of outdoor fan control method of air-conditioning, comprises the following steps:
A. sensing chamber's external environment temperature value TempX when the air-conditioner outdoor fan turns round;
B. determine between the regulatory region of outdoor fan rotating speed according to outdoor environment temperature value TempX, the output control instruction is determined the initial gear value N1 during outdoor fan is between regulatory region, and controls outdoor fan and press the corresponding rotating speed of N1 gear and move;
C. sensing chamber's external condenser coil temperature value TempY when the air-conditioner outdoor fan turns round, the outdoor condenser coil temperature value TempY that detects and default reference temperature Temp1 and Temp2 are compared, adjust the rotating speed gear of outdoor fan between regulatory region to obtain adjustment gear value N2:
When Temp1≤TempY≤Temp2, outdoor fan rotating speed gear is not adjusted;
When TempY<Temp1, the outdoor fan gear is reduced by one grade, if the deep low gear place value in having reached between regulatory region is no longer adjusted.
As TempY〉during Temp2, the outdoor fan gear is risen one grade, if the most high-grade place value in having reached between regulatory region is no longer adjusted.
D. control outdoor fan by corresponding rotating speed operation according to adjustment of rotational speed gear value N2.
Preferably, when outdoor environment temperature value TempX was larger, the initial gear value N1 between described regulatory region was larger, when TempX more hour, the initial gear value N1 between described regulatory region is less.
Preferably, determine between the regulatory region of outdoor fan rotating speed according to the outdoor environment temperature value and when exporting the initial gear value N1 of outdoor fan, its initial gear value N1 be positioned at the middle gear value of gear between regulatory region or partially near in the middle of the gear value.
Preferably, also comprised before steps A:
Outdoor fan of air-conditioner is when starting, and with preset rotation speed operation one preset time T 1, its span is 5-60 second.
Preferably, also comprised before step C:
Outdoor fan is with current gear rotating speed operation one preset time T 2, and its span is 5-60 second.
Preferably, reference temperature Temp1 and Temp2 value that it is default, the Temp1 scope: 15 ℃-50 ℃, the Temp2 scope: 15 ℃-50 ℃, and Temp2 Temp1.
Preferably, when turning round, the air-conditioner outdoor fan also comprises before sensing chamber's external environment temperature value TempX:
Detect the duty of air-conditioner cross valve to determine the mode of operation of air-conditioner.
The control circuit of outdoor fan of air-conditioner of the present invention is by detecting the Guan Wen of ambient temperature and outdoor condenser, control the outdoor fan rotating speed to adjust the air quantity of air-conditioner condenser, and then the refrigeration demand of realization in the very low situation of outdoor environment temperature, promote refrigeration and also avoid damaging compressor in the underload refrigeration, solve existing air-conditioner existing poor refrigerating efficiency and can damage the problem of compressor when cryogenic refrigeration.The present invention can satisfy air-conditioner and normally use under low temperature environment, than other control method and arrangements for speed regulation, cost is low, system is more stable, the adjustment of outdoor air quantity is steadily orderly, the rotating speed orderly adjustment of outdoor fan makes the variations in temperature of sensor little and can not cause the rotating speed fusion of outdoor fan, can realize that outdoor environment temperature is from the super wide refrigeration scope of-20 ℃ to 55 ℃.
The present invention program is by utilizing TempX to obtain between the regulatory region of outdoor fan rotating speed and the first shelves value of rotating speed, and recycling Temp Y carries out fine tuning to interval interior rotating speed, reaches the purpose of quick adjustment outdoor fan rotating speed.
The specific embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of control circuit of outdoor fan of air-conditioner, with reference to Fig. 1, in one embodiment of the invention, the control circuit of this outdoor fan of air-conditioner comprises at least:
Outdoor environment temperature detecting unit 10 is used for sensing chamber's external environment temperature value TempX when the air-conditioner outdoor fan turns round;
Condenser tube temperature detector measurement unit 30 is used for sensing chamber's external condenser coil temperature value TempY when the air-conditioner outdoor fan turns round;
Main control unit 20, determine between the regulatory region of outdoor fan rotating speed according to outdoor environment temperature value TempX, and the initial gear value N1 of definite outdoor fan between regulatory region, compare according to outdoor condenser coil temperature value TempY and the reference temperature Temp1 and the Temp2 that preset, determine the adjustment of rotational speed gear value N2 in outdoor fan is between regulatory region, export corresponding rotary speed instruction to the blower fan driver element according to initial gear value N1 or adjustment gear value N2;
Blower fan driver element 40 is used for driving the outdoor fan load according to described control instruction, to adjust outdoor fan by corresponding rotating speed operation.
Shown in Figure 1, in the embodiment of the present invention, the control circuit of outdoor fan of air-conditioner also can comprise zero cross signal detecting unit 50 and outdoor fan load unit 60.Wherein, the effect of zero cross signal detecting unit 50 is to obtain the zero cross fired time of power supply, so that main control unit 20 is controlled 40 work of blower fan driver element.Outdoor environment temperature detecting unit 10 and condenser tube temperature detector measurement unit 30 can comprise temperature sensor.These sensors namely are sent to main control unit 20 after getting temperature signal according to sequencing, judge whether to need to adjust the gear of outdoor fan for main control unit 20.The outdoor environment temperature value that main control unit 20 detects according to outdoor environment temperature detecting unit 10 is determined the wind-speed gear value of outdoor fan when entering refrigeration mode for the first time, and moves a Preset Time.after this Preset Time, condenser tube temperature detector measurement unit 30 detects the condenser coil temperature, and send to main control unit 20, the temperature signal that main control unit 20 sends according to condenser tube temperature detector measurement unit 30 judges that outdoor condenser coil temperature is whether in a preset range (for example>33 ℃<46 ℃), if, keep the outdoor fan gear motionless, if not, produce control instruction, control 40 work of blower fan driver element, output voltage signal to the outdoor fan load unit by blower fan driver element 40, drive outdoor fan load unit 60 and adjust the gear of outdoor fan.
The embodiment of the present invention is by utilizing TempX to obtain between the regulatory region of outdoor fan rotating speed and the first shelves value of rotating speed, and recycling Temp Y carries out fine tuning to interval interior rotating speed, reaches the purpose of quick adjustment outdoor fan rotating speed.And then realize promoting refrigeration demand in the very low situation of outdoor environment temperature refrigeration and also to avoid damaging compressor in the underload refrigeration, solve existing air-conditioner existing poor refrigerating efficiency and can damage the problem of compressor when cryogenic refrigeration.The present invention can satisfy air-conditioner and normally use under low temperature environment, than other control method and arrangements for speed regulation, cost is low, system is more stable, the adjustment of outdoor air quantity is steadily orderly, the rotating speed orderly adjustment of outdoor fan makes the variations in temperature of sensor little and can not cause the rotating speed fusion of outdoor fan, can realize that outdoor environment temperature is from the super wide refrigeration scope of-20 ℃ to 55 ℃.
In the embodiment of the present invention, above-mentioned main control unit 20 also is used for controlling outdoor fan of air-conditioner when starting, and before detecting TempX, with preset rotation speed operation one preset time T 1, its span is 5-60 second.Outdoor fan of air-conditioner is when starting, and with preset rotation speed operation one preset time T 1, its span is 5-60 second, allows TempY tends towards stability after the abundant heat exchange of condenser.Its preset rotation speed can be chosen as the most high-grade partially near rotating speed or the most high-grade rotating speed, and its principle is got up for smooth and easy operation when starting, the excessive motor that damages of blower motor electric current when preventing from starting because of the slow-speed of revolution.Have 15 grades as blower fan gear in previous embodiment, can be chosen as in the present embodiment the 15th grade or the 13rd grade, the 14th grade etc.
Further, main control unit 20 also is used for controlling outdoor fan of air-conditioner and moved a preset time T 2 with current gear rotating speed before detecting TempY, and its span is 5-60 second.Can allow so the continuous duplicate detection of control system, along with TempX, variation automatic decision and the regulation stall of TempY reach best result of use.
Referring to Fig. 2, in a preferred embodiment of the present invention, the control circuit of outdoor fan of air-conditioner also can comprise: wire jumper detecting unit 70, in order to obtain current input power frequency values, and determine that current type value exports main control unit 20 to, so that main control unit 20 is determined the different outdoor fan tachometer values of each wind-speed gear of outdoor fan according to different type of machines.
Further, in one embodiment, the control circuit of above-mentioned outdoor fan of air-conditioner also comprises: cross valve duty detecting unit 80, in order to the duty that detects the air-conditioner cross valve to determine the mode of operation of air-conditioner, when being refrigeration mode, just enables by air-conditioner outdoor fan control method of the present invention, when being heating mode, do not enable outdoor fan control method of the present invention.Owing to being provided with cross valve duty detecting unit 80, the control circuit of outdoor fan of air-conditioner of the present invention can carry out work according to the mode of operation of air-conditioner, avoids also air-conditioner being carried out above-mentioned control under heating mode, causes energy resource consumption.
Further, the control circuit of above-mentioned outdoor fan of air-conditioner also can comprise LED display unit 90, is provided with the LED lamp in this LED display unit 90, in order to show air-conditioner fault message in the course of the work.Owing to being provided with LED display unit 90, the control circuit of outdoor fan of air-conditioner of the present invention can show fault message, so that the user safeguards air-conditioning.
Concrete, in the embodiment of the present invention, the course of work of the control circuit of outdoor fan of air-conditioner can comprise:
At first, when outdoor fan began to start, wire jumper detecting unit 70 obtained current input power frequency values and determines current air-conditioner type value.Then, cross valve duty detecting unit 80 judges whether cross valve powers on, if, start the first full speed running Preset Time of outdoor fan interval T 1 50 seconds, allow TempY tends towards stability after the abundant heat exchange of condenser, by the outdoor environment temperature detecting unit 10 external environment temperature T empX of sensing chamber, main control unit 20 is controlled outdoor fan according to this outdoor environment temperature TempX and is entered initial gear value N1 again.outdoor fan is at the default time interval T2 of initial gear operation one, timing judging unit 50 timing and judging whether this moment reach the default time interval of Preset Time interval T 2(and can be set as 50 seconds, also according to different actual needs, Preset Time can be set and be spaced apart the other times value), if, condenser tube temperature detector measurement unit 30 external condenser coil temperature value TempY of sensing chamber, main control unit 20 more outdoor condenser coil temperature value TempY and reference temperature Temp1 and Temp2, if Temp1≤TempY≤Temp2, 20 pairs of outdoor fan rotating speed gears of main control unit do not adjust.If during TempY<Temp1,20 pairs of outdoor fan gears of main control unit reduce by one grade, if the deep low gear place value in having reached between regulatory region is no longer adjusted.If TempY〉during Temp1,20 pairs of outdoor fan gears of main control unit rise one grade, if the most high-grade place value in having reached between regulatory region is no longer adjusted.After main control unit 20 is adjusted the outdoor fan gear at every turn, outdoor fan moves Preset Time interval T 2 50 seconds with current gear rotating speed, comparison condenser coil temperature value TempY and reference temperature Temp1 and Temp2 carry out above judgement and adjust outdoor fan rotating speed gear, allow the continuous duplicate detection of control system, along with TempX, variation automatic decision and the regulation stall of TempY reach best result of use.
The first reference temperature Temp1 and the second reference temperature Temp2 magnitude relationship are: Temp1<Temp2, and 5 ℃≤Temp2-Temp1≤20 ℃, avoid these two reference temperature value can be because not differing too little as causing the frequent adjustment number of times of outdoor fan gear below 2 ℃ the time too much, when perhaps two reference temperatures differ too large, the adjustment of outdoor fan gear loses effect of the present invention very little.In the present embodiment, the first reference temperature Temp1 is made as 33 ℃, and the second reference temperature Temp2 is made as 46 ℃; And in other embodiments of the invention, Temp1 can be set and Temp2 is other temperature values according to different actual needs.Temp1 and Temp2, scope is 15 ℃-50 ℃
Whether off-premises station powers on by cross valve determines whether refrigeration mode, and when the control circuit that is startup outdoor fan of air-conditioner of the present invention under refrigeration mode, the first full speed running of outdoor fan entered initial gear according to outdoor environment temperature value TempX after 50 seconds.Concrete, in one embodiment of the invention, initial gear rule is as shown in table 1 below:
Table 1
As shown in Table 1, when TempX was higher, the initial gear value of outdoor fan was larger, and during as 7 ℃≤TempX<11 ℃, the initial gear value of outdoor fan is 7, and when 11 ℃≤TempX<15 ℃, the initial gear value of outdoor fan is 9.When TempX was lower, the initial gear value of outdoor fan was less, and during as-8 ℃≤TempX<-2 ℃, the initial gear value of outdoor fan is 4, and when-13 ℃≤TempX<-8 ℃, the initial gear value of outdoor fan is 3.
After moving the full speed wind shelves of 50 seconds, the outdoor fan rotating speed will enter initial wind shelves first according to outdoor environment temperature value TempX, make adjustment according to the variation of condenser coil temperature value TempY more afterwards.
In one embodiment of the invention, can arrange according to outdoor environment temperature and adjust the interval, after getting outdoor condenser coil temperature value TempY and outdoor environment temperature value TempX, according to outdoor environment temperature value TempX residing interval every 50 seconds size adjustment outdoor fan gears by 46 ℃ of more outdoor condenser coil temperature value TempY and 33 ℃ of the first reference temperature Temp1 and the second reference temperature Temp2.See table 2, gear and the corresponding relation between ambient zone of outdoor fan can be:
1) judgement TempY temperature, when TempY satisfies 33 ℃≤TempY≤46 ℃, outdoor fan is with regard to the uncomfortable rectification campaign grade, stable operation.
2) can only select to rise or descend in the interval corresponding gear number of TempX in the time of ungratified, can only rise step by step during the rotating speed gear change or descend step by step.
3) surpass this scope if the TempY temperature raises, the wind shelves raise, until the gear maximum in being elevated between this outdoor environment temperature value TempX gear regulatory region does not adjust; If the TempY temperature reduces lower than this scope, wind-speed gear reduces, until the gear minimum of a value in being reduced between this gear regulatory region does not adjust.
Be in as shown in Table 1 the interval of-2 ℃≤TempX<3 ℃ correspondence when being 2 ℃ as outdoor environment temperature value TempX, the initial gear value of outdoor fan is 5, be in as shown in Table 2 the interval of-2 ℃≤TempX<3 ℃ correspondence, the gear value of outdoor fan in this is interval has 3/4/5/6/7/8, every 50 seconds detection primary condenser coil temperature value TempY, if 33 ℃≤TempY≤46 ℃, wind speed keep the 5th grade constant.If TempY<33 ℃, outdoor fan descends one grade to 4, if dropped to this deep low gear 3 in interval, the outdoor fan gear no longer descends.If TempY〉46 ℃, outdoor fan rises one grade to 6, if risen to this most high-grade 8 in interval, the outdoor fan gear no longer rises.
Table 2
As can be seen from Table 1 and Table 2, the initial gear value of outdoor fan is positioned at middle gear value or the partially near middle gear between corresponding regulatory region, outdoor fan has entered initial gear value by outdoor environment temperature value TempX like this, when in carrying out between regulatory region according to condenser coil temperature value TempY temperature value again, gear is adjusted, can adjust to fast the target shift place value in the interval.3 as the initial gear value determined when-13 ℃≤TempX<-8 ℃ at table 1, ℃ determine that the regulation stall gear value in this interval is 1/2/3/4/5 according to-13 ℃≤TempX<-8 in table 4, can be found out by table 1 and table 2, the initial gear value 3 of determining when-13 ℃≤TempX<-8 ℃, be in by table 4 according to the middle gear value in ℃ definite regulation stall value 1/2/3/4/5 of-13 ℃≤TempX<-8, then can adjust to 2 grades or 1 grade to low-grade location fast according to the TempY temperature value, perhaps adjust to 4 grades or 5 grades to high tap position.
In embodiments of the present invention, when air-conditioner received off signal shutdown or outage, the control process of above-mentioned control circuit also finished thereupon.
Outdoor fan motor of the present invention can be alternating current generator, can be also direct current generator.When the outdoor fan motor is alternating current generator, the rotating speed that electric-motor drive unit can be adjusted motor by the mode of regulating alternating current generator input voltage tachometer value corresponding to outdoor fan gear in the above description; When the outdoor fan motor is direct current generator, electric-motor drive unit can conveniently be adjusted dc motor speed by the mode that the PWM (pulsewidth modulation) of direct current generator is controlled in adjustment, can easily be with the adjustment of rotational speed of direct current generator tachometer value corresponding to outdoor fan gear in the above description.
Blower fan gear bands of the present invention is the 3-20 shelves, is preferably the 5-15 shelves.Always have in the present embodiment 15 grades, the gear value is larger, and corresponding tachometer value is higher.Gear value also can be defined as according to the air-conditioning practical operation situation other numerical value, as 5 grades, 6 grades, 20 grades etc.The tachometer value of every grade can be according to the actual motion Location of requirement of air-conditioning.In the present embodiment, the outdoor fan tachometer value of every grade accounts for ratio such as the following table of outdoor fan maximum (top) speed:
The outdoor fan gear |
1 grade |
2 grades |
3 grades |
4 grades |
5 grades |
6 grades |
7 grades |
8 grades |
Account for the maximum (top) speed ratio |
6% |
13% |
22% |
29% |
35% |
41% |
47% |
54% |
The outdoor fan gear |
9 grades |
10 grades |
11 grades |
12 grades |
13 grades |
14 grades |
15 grades |
|
Account for the maximum (top) speed ratio |
60% |
70% |
75% |
80% |
85% |
90% |
95% |
|
The present invention also provides a kind of air-conditioning, and it comprises outdoor condenser, outdoor fan at least, also comprises the control circuit of aforementioned outdoor fan of air-conditioner.The structure of this control circuit and operation principle can referring to accompanying drawing 1,2 and corresponding embodiment, not be described further at this.Due to the control circuit with aforementioned outdoor fan of air-conditioner, air-conditioning of the present invention can satisfy air-conditioner normally to be used under low temperature environment, than other control method and arrangements for speed regulation, cost is low, system is more stable, the adjustment of outdoor air quantity is steadily orderly, and the rotating speed orderly adjustment of outdoor fan makes the variations in temperature of sensor little and can not cause the rotating speed fusion of outdoor fan, can realize that outdoor environment temperature is from the super wide refrigeration scope of-20 ℃ to 55 ℃.
The present invention also provides a kind of control method of outdoor fan of air-conditioner, and the method can realize based on the control circuit of aforementioned outdoor fan of air-conditioner.Shown in Figure 3, in one embodiment, the method comprises the following steps:
Step S10, sensing chamber's external environment temperature value TempX when the air-conditioner outdoor fan turns round;
Step S20 determines between the regulatory region of outdoor fan rotating speed according to outdoor environment temperature value TempX, and the output control instruction is determined the initial gear value N1 during outdoor fan is between regulatory region, and controls outdoor fan and press the corresponding rotating speed of N1 gear and move;
Step S30, sensing chamber's external condenser coil temperature value TempY when the air-conditioner outdoor fan turns round, the outdoor condenser coil temperature value TempY that detects and default reference temperature Temp1 and Temp2 are compared, adjust the rotating speed gear of outdoor fan between regulatory region to obtain adjustment gear value N2:
When Temp1≤TempY≤Temp2, outdoor fan rotating speed gear is not adjusted;
When TempY<Temp1, the outdoor fan gear is reduced by one grade, if the deep low gear place value in having reached between regulatory region is no longer adjusted.
As TempY〉during Temp2, the outdoor fan gear is risen one grade, if the most high-grade place value in having reached between regulatory region is no longer adjusted.
Step S40 controls outdoor fan by corresponding rotating speed operation according to adjustment of rotational speed gear value N2.
In the present embodiment, can the wind speed of outdoor fan of air-conditioner be divided into a plurality of (for example 5-20) default gear by main control unit.TempX is higher for the outdoor environment temperature value, and the initial gear initial value of the outdoor fan N1 that is determined by TempX is larger, and the outdoor fan rotating speed is larger; TempX is lower for the outdoor environment temperature value, and the initial gear initial value of the outdoor fan N1 that is determined by TempX is less, and the outdoor fan rotating speed is lower.
Further, in the embodiment of the present invention, detect once outdoor condenser coil temperature every Preset Time, judge that then outdoor condenser coil temperature is whether in a preset range, if in this scope, main control unit controlled wind speed gear does not adjust; Surpass preset range if outdoor condenser coil temperature raises, main control unit is controlled one grade of outdoor fan rotating speed gear rising, until the gear maximum in being elevated between this gear regulatory region does not adjust; If outdoor condenser coil temperature reduces lower than this scope, outdoor fan rotating speed gear reduces by one grade, until the gear minimum of a value in being reduced between this gear regulatory region does not adjust.
In the preceding method flow process, also can comprise before steps A:
Outdoor fan of air-conditioner is when starting, and with preset rotation speed operation one preset time T 1, its span is 5-60 second, allows TempY tends towards stability after the abundant heat exchange of condenser.Its preset rotation speed can be chosen as the most high-grade partially near rotating speed or the most high-grade rotating speed, and its principle is got up for smooth and easy operation when starting, the excessive motor that damages of blower motor electric current when preventing from starting because of the slow-speed of revolution.Have 15 grades as blower fan gear in previous embodiment, can be chosen as in the present embodiment the 15th grade or the 13rd grade, the 14th grade etc.
Further, also can comprise before step C:
Outdoor fan is with current gear rotating speed operation one preset time T 2, and its span is 5-60 second.Allow the continuous duplicate detection of control system, along with TempX, variation automatic decision and the regulation stall of TempY reach best result of use.
In embodiments of the present invention, exchange the outdoor fan rotating speed outward to adjust the air quantity of air-conditioning condenser by outdoor environment temperature and outdoor condenser coil temperature-controlled chamber, wind-speed gear value when after start, the described outdoor environment temperature of outdoor environment temperature judgement being entered refrigeration mode for the first time, and move a Preset Time, judge that more outdoor condenser coil temperature is whether in a preset range, again wind-speed gear is carried out gear and raise or reduce and adjust, to satisfy the very low refrigeration demand of outdoor environment temperature.Compared with prior art, the control method of outdoor fan of air-conditioner of the present invention designs for low-temperature refrigeration air conditioner specially, satisfying air-conditioning normally uses under low temperature environment, than other control method and arrangements for speed regulation, cost is low, and system is more stable, and the adjustment of outdoor air quantity is steadily orderly, the rotating speed orderly adjustment of outdoor fan makes the variations in temperature of sensor little and can not cause the rotating speed fusion of outdoor fan, can realize that outdoor environment temperature is from the super wide refrigeration scope of-20 ℃ to 55 ℃.
In previous embodiment, comprise before comparing with default reference temperature carrying out the described outdoor condenser coil temperature that will detect: for example 33 ℃ of default the first reference temperature Temp1() and for example 46 ℃ of the second reference temperature Temp2(), the value of described the second reference temperature Temp2 is greater than described the first reference temperature Temp1.Should be noted that, 33 ℃ and 46 ℃ is the temperature value in a preferred embodiment of the present invention, in other embodiments of the invention, TempY temperature preset range can be set for other temperature values according to different actual needs, for example the span of Temp1 and Temp2 can for: 15 ℃-50 ℃.
In one embodiment of the present invention, also comprised before execution in step S30:
Obtain current input power frequency values, and determine current type value, so that main control unit is regulated the outdoor fan rotating speed according to type output control instruction.
Detect the duty of air-conditioner cross valve to determine the mode of operation of air-conditioner.Concrete, be expressed as refrigeration mode under cross valve no power state, enable outdoor fan control method of the present invention, be expressed as heating mode under the cross valve "on" position, outdoor fan is pressed the original control method operation of air-conditioning.Owing to being provided with cross valve duty detecting unit 80, the control circuit of outdoor fan of air-conditioner of the present invention can carry out work according to the mode of operation of air-conditioner, avoids also air-conditioner being carried out above-mentioned control under heating mode, causes energy resource consumption.
Show air-conditioner fault message in the course of the work.Owing to being provided with LED display unit, the control circuit of outdoor fan of air-conditioner of the present invention can show fault message, so that the user safeguards air-conditioning.
Referring to Fig. 4, in a preferred embodiment of the present invention, the control method flow process of above-mentioned outdoor fan of air-conditioner can comprise the following steps:
Step S1, outdoor fan obtain current input power frequency values and determine current type value when starting;
Step S2 judges whether cross valve powers on, if otherwise execution in step S3 if do not start the control circuit of outdoor fan of air-conditioner, finishes the control method flow process of outdoor fan of air-conditioner of the present invention.
Step S3, the first full speed running of outdoor fan 50 seconds, then the external environment temperature value TempX of sensing chamber, TempX determines initial gear value according to this outdoor environment temperature value.
Step S4, outdoor fan was with current gear value operation 50 seconds.
Step S5, if the size of condenser coil temperature value TempY and the first preset temperature Temp1 and the second preset temperature Temp2 value relatively during Temp1≤TempY≤Temp2, does not adjust to outdoor fan rotating speed gear, and jumps to step S4.Otherwise enter step S6.
If step S6 during TempY<Temp1, judges whether the outdoor fan gear has reached minimum one grade, if otherwise reduce by one grade, be no longer to adjust, and enter and jump to step S4.Otherwise enter step S7.
If step S7 is TempY〉during Temp1, judge whether the outdoor fan gear has reached high tap position, if otherwise rise one grade, be no longer to adjust, and enter step S4.Otherwise jump to step S4.
The present invention also provides a kind of air-conditioner, and the schematic diagram of this air-conditioner can increase controller and go to realize the cryogenic refrigeration function based on control method of the present invention on existing air-conditioning, be conducive to carry out upgrading on former type.Shown in Figure 5.In figure, air-conditioning system comprises the compressor 1 that is connected successively, cross valve 2, outdoor heat exchanger 4, outdoor fan 3, off-premises station control circuit mainboard 6, off-premises station control circuit board 7 of the present invention, throttling arrangement 5, indoor heat exchanger 9, indoor fan 8.Off-premises station mainboard 6 and off-premises station control circuit board 7 can be regulated the rotating speed of outdoor fan 3, thus the heat exchange amount of conditioning chamber external heat exchanger 4.Described off-premises station control circuit board 7 also comprises outdoor environment temperature detecting unit 71, outdoor heat exchanger condensation temperature detecting unit 72.Described outdoor environment temperature detecting unit 71 removes to obtain outdoor environment temperature value TempX.Described outdoor heat exchanger condensation temperature detecting unit 72 obtains condenser coil temperature T empY, is arranged on condenser.
for example, if need to increase the cryogenic refrigeration function on a air-conditioning, before increase cryogenic refrigeration function, the off-premises station control circuit mainboard 6 of former air-conditioning directly connects the outdoor fan control line, the output blower fan drives the operation of signal controlling outdoor fan, just only need to be connected off-premises station control circuit mainboard 6 this moment with off-premises station control circuit board 7, outdoor environment temperature detecting unit on off-premises station control circuit board 7 (outdoor environment temperature temperature-sensitive bag) 71 installs and is placed on the condenser back, outdoor heat exchanger condensation temperature detecting unit (outdoor heat exchanger condensation temperature temperature-sensitive bag) 72 is arranged on condenser, the outdoor fan control line is inserted on off-premises station control circuit board 7.Off-premises station control circuit board 7 goes technical scheme according to the present invention to realize the cryogenic refrigeration function, and stable fast, required time is short.
These are only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.