CN102997373B - Method for controlling outdoor fan of air conditioner according to environmental wind direction - Google Patents
Method for controlling outdoor fan of air conditioner according to environmental wind direction Download PDFInfo
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- CN102997373B CN102997373B CN201210582643.2A CN201210582643A CN102997373B CN 102997373 B CN102997373 B CN 102997373B CN 201210582643 A CN201210582643 A CN 201210582643A CN 102997373 B CN102997373 B CN 102997373B
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Abstract
The invention discloses a method for controlling an outdoor fan of an air conditioner according to the environmental wind direction. The method includes detecting the environmental wind direction first; setting the rotation of the outdoor fan to be forward so that wind is discharged from an air outlet when the environmental wind blows from an air inlet to the air outlet of the outdoor fan; and setting the rotation of the outdoor fan to be reverse so that wind is discharged from the air inlet when the environmental wind blows from the air outlet to the air inlet of the outdoor fan. According to the method, the operation status of the outdoor fan is adjusted according to the environmental wind direction, and therefore a system can utilize natural resources fully to achieve efficient operation of the air conditioner. When the environmental wind direction is opposite to the air outlet direction of the existing air conditioner, the air volume can be prevented from reducing or even be improved and complete heat exchange of a heat exchanger can be guaranteed through shutdown or reverse rotation control of the outdoor fan; and when the environmental wind direction is the same with the air outlet direction of the existing air conditioner, the outdoor fan is controlled to be shut down or the rotation speed is reduced, therefore the overall operation power of the air conditioner is reduced and efficient and energy-saving functions are performed when the heat exchange is guaranteed.
Description
Technical field
The invention belongs to air conditioning and refrigeration field of engineering technology, specifically, relate to a kind of method of implementing control for the outdoor fan to air-conditioner.
Background technology
In current air-conditioner product, mostly all comprise indoor set and off-premises station two parts.Off-premises station is responsible for refrigeration or is heated, and indoor set is responsible for cold air or hot gas to be transported to indoor, with the effect that reaches cooling or heat up.
Off-premises station is in the process of refrigeration or heating operation, and the caloric requirement discharging by heat exchanger utilizes outdoor fan to be promptly dispersed in air.For traditional air-conditioner outdoor fan, it turns to all and fixes, and rotating speed is only subject to the control of air-conditioner self-operating situation, is not subject to the impact of extraneous wind direction and wind speed.There is following shortcoming in the traditional control method of this air-conditioner outdoor fan:
(1) if extraneous ambient wind to relative with the air-out direction of outdoor fan, be extraneous wind to the air outlet of off-premises station, as shown in Figure 1, the air quantity by heat exchanger will greatly reduce like this, cause off-premises station heat transfer effect poor, impact refrigeration or the effect heating;
(2) if extraneous ambient wind to the air-out direction with outdoor fan in opposite directions, be that extraneous wind is to the air inlet of off-premises station, as shown in Figure 2, like this along with the increase of environment air quantity, air quantity by heat exchanger may be very abundant, but now, because outdoor fan is still in running, so will produce idle work, cause the waste of the energy.
Summary of the invention
The object of the present invention is to provide a kind ofly can automatically change the method that air-conditioner outdoor fan turns to according to the wind direction of external environment, to realize the efficient operation of air-conditioner.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
According to ambient wind, to a method of controlling air-conditioner outdoor fan, testing environment wind direction first, when ambient wind is air inlet by off-premises station while blowing to air outlet, arranges turning to for forward, by air outlet of outdoor fan; When ambient wind is air outlet by off-premises station while blowing to air inlet, turning to for reversion, by air inlet air-out of outdoor fan is set.
As ambient wind to a kind of preferred judgment mode, the air-out direction during by outdoor fan forward is set as X-direction, testing environment wind speed, when ambient wind velocity the component of X-axis be on the occasion of time, judge that ambient wind blows to air outlet by the air inlet of off-premises station; When ambient wind velocity is when the component of X-axis is negative value, judge that ambient wind blows to air inlet by the air outlet of off-premises station.
When the rotating speed of outdoor fan is controlled, different for the type of outdoor fan, following four kinds of preferred modes of speed regulation are proposed:
1,, when described outdoor fan is infinitely variable speeds blower fan, the rotating speed R of outdoor fan can be calculated and be generated by following formula:
Work as V
fduring <A,
;
Work as V
fduring>=A, R=0;
Wherein, V
f: the absolute value of ambient wind velocity component on air-out direction when outdoor fan forward;
A: for meeting the heat exchange requirement of outdoor unit heat exchanger, the default air speed value through heat exchanger surface;
R
h: outdoor fan maximum (top) speed;
R
l: outdoor fan minimum speed.
Further, when ambient wind blows to air outlet by the air inlet of off-premises station, described A value between 1.5 ~ 3.0m/s; When ambient wind blows to air inlet by the air outlet of off-premises station, described A value between 4.5 ~ 6.0m/s.
2, when described outdoor fan is multistep speed regulation blower fan, first utilize the rotating speed computing formula of above-mentioned outdoor fan to calculate the rotating speed R of outdoor fan, then according to rotating speed R, determine the gear of outdoor fan; If rotating speed R between two grades of wind speed time, chooses in two grades the wind speed operation of large a grade.
3, when described outdoor fan is three-step timing blower fan, if ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is in rising trend, according to the absolute value V of ambient wind velocity component on air-out direction when the outdoor fan forward
fthe gear of determining outdoor fan is as follows:
If V
f≤ V
11, V
11value between 1.0 ~ 1.5m/s, the gear that outdoor fan is set is high tap position, control outdoor fan and run up, rotating speed corresponding to described high tap position can be in the scope of 820 ~ 880rpm value;
If V
11<V
f≤ V
12, V
12value between 1.5 ~ 2.0m/s, the gear that outdoor fan is set is middle gear, controls the running of outdoor fan middling speed, rotating speed corresponding to described middle gear can be in the scope of 650 ~ 720rpm value;
If V
12<V
f≤ V
13, V
13value between 2.0 ~ 3.0m/s, the gear that outdoor fan is set is low-grade location, controls outdoor fan low-speed running, rotating speed corresponding to described low-grade location can be in the scope of 450 ~ 550rpm value;
If V
f>V
13, control outdoor fan and shut down.
If ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is on a declining curve,
If current outdoor fan is shut down, and V
f>V
14, V
14value between 1.5 ~ 2.0m/s, keeps outdoor fan in stopped status;
If V
fdrop to V
14, control outdoor fan and start, and work as V
15<V
f≤ V
14, V
15between 1.0 ~ 1.5m/s, during value, control outdoor fan low-speed running;
Work as V
16<V
f≤ V
15, V
16between 0.5 ~ 1.0m/s, during value, control the running of outdoor fan middling speed;
Work as V
f≤ V
16time, control outdoor fan and run up.
If ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is in rising trend,
Work as V
f≤ V
21, V
21between 4.0 ~ 4.5m/s, during value, control outdoor fan and run up;
Work as V
21<V
f≤ V
22, V
22between 4.5 ~ 5.0m/s, during value, control the running of outdoor fan middling speed;
Work as V
22<V
f≤ V
23, V
23between 5.0 ~ 6.0m/s, during value, control outdoor fan low-speed running;
Work as V
f>V
23time, control outdoor fan and shut down.
If ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is on a declining curve,
If current outdoor fan is shut down, and V
f>V
24, V
24value between 4.5 ~ 5.0m/s, keeps outdoor fan in stopped status;
If V
fdrop to V
24, control outdoor fan and start, and at V
25<V
f≤ V
24, V
25between 4.0 ~ 4.5m/s, during value, control outdoor fan low-speed running;
Work as V
26<V
f≤ V
25, V
26between 3.5 ~ 4.0m/s, during value, control the running of outdoor fan middling speed;
Work as V
f≤ V
26time, control outdoor fan and run up.
4,, when described outdoor fan is single speed blower fan, set V
ffor the absolute value of ambient wind velocity V component on air-out direction when the outdoor fan forward,
If a ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is in rising trend,
Work as V
f≤ V
13, V
13between 2.0 ~ 3.0m/s, during value, control outdoor fan running;
Work as V
f>V
13time, control outdoor fan and shut down;
If b ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is on a declining curve,
If current outdoor fan is shut down, and V
f>V
14, V
14value between 1.5 ~ 2.0m/s, keeps outdoor fan in stopped status;
If V
fdrop to V
14, control outdoor fan and start running;
If c ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is in rising trend,
Work as V
f≤ V
23, V
23between 5.0 ~ 6.0m/s, during value, control outdoor fan running;
Work as V
f>V
23time, control outdoor fan and shut down;
If d ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is on a declining curve,
If current outdoor fan is shut down, and V
f>V
24, V
24value between 4.5 ~ 5.0m/s, keeps outdoor fan in stopped status;
If V
fdrop to V
24, control outdoor fan and start running.
Compared with prior art, advantage of the present invention and good effect are: the present invention to the running status of adjusting air-conditioner outdoor fan, can make full use of the natural resources system according to extraneous ambient wind, realizes the efficient operation of air-conditioner.When ambient wind is relative to the air-out wind direction with conventional air conditioner, by controlling outdoor fan, shut down or outdoor fan is reversed, can avoid air quantity to reduce and even can improve air quantity, guarantee the abundant heat exchange of heat exchanger; In ambient wind, to the air-out wind direction with conventional air conditioner, in opposite directions time, by controlling outdoor fan, shut down or reduce the rotating speed of outdoor fan, when guaranteeing heat exchange efficiency, can, so that the operate power of air-conditioner complete machine reduces, play energy-efficient effect.
Read by reference to the accompanying drawings after the detailed description of embodiment of the present invention, it is clearer that the other features and advantages of the invention will become.
Accompanying drawing explanation
The air-out wind direction that Fig. 1 is ambient wind when with outdoor fan forward over against time wind direction schematic diagram;
Wind direction schematic diagram when air-out wind direction that Fig. 2 is ambient wind when with outdoor fan forward is consistent;
Air-out wind direction that Fig. 3 is ambient wind when with outdoor fan forward is non-over against the wind direction schematic diagram when consistent;
Fig. 4 is the installation site schematic diagram of a kind of embodiment of wind speed/wind direction measuring instrument on air-conditioner outdoor unit;
Fig. 5 is the top view of Fig. 4;
Fig. 6 is the schematic block circuit diagram of a kind of embodiment of air-conditioner outdoor fan control circuit;
Fig. 7 is the control flow chart to a kind of embodiment of control air-conditioner outdoor fan according to ambient wind proposed by the invention;
Fig. 8 is to be three-step timing blower fan for outdoor fan, and ambient wind is while blowing to air outlet by the air inlet of outdoor fan, the corresponding relation oscillogram of ambient wind velocity and outdoor fan rotating speed;
Fig. 9 is to be three-step timing blower fan for outdoor fan, and ambient wind is while blowing to air inlet by the air outlet of outdoor fan, the corresponding relation oscillogram of ambient wind velocity and outdoor fan rotating speed.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
The present embodiment is for current air-conditioner, the air-out direction of its off-premises station is fixed, and outdoor environment wind direction has very strong randomness, thereby affect the problem of off-premises station heat transfer effect, proposed a kind ofly can automatically regulate according to the variation of outdoor environment wind direction the technology of the air-out direction of air-conditioner outdoor fan, and then guaranteeing, under the prerequisite of the abundant heat exchange of heat exchanger, significantly to have reduced the operation power consumption of off-premises station, realized the efficient operation of air-conditioner complete machine.
As shown in Figure 4, the intellectuality adjusting turning in order to realize outdoor fan, the present embodiment first on the off-premises station of air-conditioner, set up for detection of ambient wind to measuring instrument 2, by measuring instrument 2 generate represent ambient wind to detection signal, transfer to the master control borad in off-premises station, and then utilize primary control program to determine the air-out direction that outdoor fan is suitable, realize the commutation of outdoor fan is controlled.
For current air-conditioner, air outlet 4 operated by rotary motion of off-premises station are on the front panel 3 of outdoor set cabinet, as shown in Figure 4, air inlet operated by rotary motion is on the backboard of outdoor set cabinet, outdoor fan 5 is installed in casing, when outdoor fan forward, by air inlet air draught, by the outside air draft of air outlet 4.For fear of measuring instrument 2, be subject to the impact of outdoor fan 5 air-out, the present embodiment is preferably arranged on described measuring instrument 2 outside of outdoor set cabinet, and is positioned on the top board 1 of casing, to guarantee that ambient wind is to the accuracy detecting.For the consideration of off-premises station overall aesthetics aspect, the present embodiment is preferably arranged on described measuring instrument 2 middle part of casing top board 1, shown in Figure 5.
Certainly, described measuring instrument 2 also can be arranged on other positions of off-premises station, as long as can guarantee abundant contact chamber external environment and avoid air inlet and the air outlet of off-premises station, the present embodiment be not limited in above for example.
The wind direction detection signal that measuring instrument 2 is detected to output transfers to the controller on off-premises station master control borad, by controller, according to ambient wind, to generating, be used for controlling the control signal that outdoor fan turns to, export drive circuit to, and then realize the driving of outdoor fan is controlled by drive circuit, realize the automatic adjusting of outdoor fan air-out direction.
In order to strengthen heat transfer effect, when ambient wind blows to the air outlet of off-premises station, when the air-out direction of ambient wind when with outdoor fan forward is relative, example as shown in Figure 1 over against situation, control outdoor fan reversion, by air outlet air draught, the air inlet air-out of off-premises station.Now, blow to heat exchanger in off-premises station together with the air-out of ambient wind and outdoor fan, making increases by the air quantity of heat exchanger, improves heat exchange efficiency.Otherwise when ambient wind blows to the air inlet of off-premises station, the air-out direction of ambient wind when with outdoor fan forward is in opposite directions time, example consistent situation as shown in Figure 2, controls outdoor fan forward, by air inlet air draught, the air outlet of off-premises station.Now, ambient wind blows to the heat exchanger in off-premises station, the heat that outdoor fan absorption heat-exchange device distributes, and be discharged into ambient atmosphere, by working along both lines, accelerate heat transfer rate.
In order to meet the commutation requirement of outdoor fan, for transducer air conditioning, can select three-phase alternating current blower fan as described outdoor fan, for heat exchanger, dispel the heat.As shown in Figure 6, in order to realize, the driving of three-phase alternating current blower fan is controlled, the present embodiment has designed frequency converter and reversing switch K1, K2 in drive circuit.The three-phase alternating-current supply U, the V that by frequency converter, export, W are transferred to the feeder ear of three-phase alternating current blower fan via reversing switch K1, K2.Described reversing switch K1, K2 preferably adopt A.C. contactor to carry out circuit design, receive controller according to ambient wind to the switch controlling signal that produces and export, and then by controlling reversing switch K1 conducting, K2, turn-off (or reversing switch K2 conducting, K1 turn-off), change the sequential of the three-phase alternating-current supply that is applied to three-phase alternating current blower fan, realize the commutation of three-phase alternating current blower fan is controlled.
In order to guarantee safe power supply, in circuit design, need two groups of A.C. contactor K1, K2 to carry out interlocking design, connect in the coil power supply loop of the A.C. contactor K1 normally-closed contact of A.C. contactor K2, and the normally-closed contact of the A.C. contactor K1 that connects in the coil power supply loop of A.C. contactor K2, thereby can guarantee to only have the AC power of one group of sequential to transfer to the feeder ear of three-phase alternating current blower fan at synchronization, control three-phase alternating current blower fan forward or reversion.
For when improving heat transfer effect, reduce the power consumption of outdoor fan, the present embodiment is also provided with wind speed detection device on described off-premises station, preferably be built in described measuring instrument 2, select wind speed/wind direction measuring instrument to be arranged on the top board 1 of outdoor set cabinet, to meet ambient wind to the synchronous testing requirement with ambient wind velocity.
The wind speed detection signal that detects output by wind speed/wind direction measuring instrument is transferred to outdoor controller, by controller, according to wind speed size, generate speed controling signal, export the frequency converter in drive circuit to, by frequency converter, change the frequency of the AC power that exports outdoor fan to, and then realize the intellectuality adjusting to outdoor fan rotating speed.
Certainly, described outdoor fan also can adopt DC fan to carry out system, changes phase sequence and the size of current of the power supply that transfers to DC fan by drive circuit, to realize, DC fan is turned to the adjusting with rotating speed.
Structural design based on above-mentioned air-conditioner outdoor unit, at length sets forth turning to the concrete control method of rotating speed of air-conditioner outdoor fan below in conjunction with Fig. 7.
S701, control air-conditioner start operation, select operational mode, i.e. refrigerating operaton pattern or heating operation pattern.
S702, startup wind speed/wind direction measuring instrument, the wind direction of sensing chamber's external environment and wind speed;
In the present embodiment, for the detection of outdoor environment wind direction, preferably utilize ambient wind velocity V component of air-out direction when the outdoor fan forward to judge, as shown in Figure 3.What on the front panel of setting outdoor set cabinet, arrange is air outlet, what on backboard, arrange is air inlet, certainly, also air inlet can be also set on the side plate of the left and right sides of casing simultaneously, during by outdoor fan forward, the air-out direction of (by the air inlet air draught of off-premises station, outdoor fan corresponding during air outlet turns to) is set as the direction of X-axis, the component V0 of computing environment wind speed V in X-axis, be V0=v*cos α, v is the absolute value of ambient wind velocity size.If component V0 is negative value, judge that ambient wind blows to air inlet by the air outlet of off-premises station, the air-out direction during with outdoor fan forward is relative.Fig. 1 show the air-out wind direction of ambient wind when with outdoor fan forward over against limiting case, the angle between the two is 180 °, V0=-v now, the wind speed that blows to off-premises station is maximum.If component V0 be on the occasion of, judge that ambient wind blows to air outlet by the air inlet of off-premises station, the air-out direction during with outdoor fan forward in opposite directions.Fig. 2 shows the air-out wind direction consistent limiting case of ambient wind when with outdoor fan forward, and the angle between the two is 0 °, now V0=v.
For the wind speed size that is blown into the ambient wind in off-premises station, the absolute value V of component V0 for the present embodiment
frepresent.
S703, according to ambient wind to determining turning to of outdoor fan;
In the present embodiment, in order to make full use of ambient wind, the heat exchanger in off-premises station is carried out to heat exchange, when the air outlet of ambient wind by off-premises station being detected and blow to air inlet, be component V0 while being negative value, control outdoor fan reversion, from air outlet air draught, air inlet air draft, make the air-out direction of outdoor fan and ambient wind in opposite directions, together blow to heat exchanger, to improve heat transfer effect.
Otherwise, when the air inlet of ambient wind by off-premises station being detected and blow to air outlet, be component V0 on the occasion of time, control outdoor fan forward, make outdoor fan by air inlet air draught, air outlet air draft, i.e. air-out direction X-direction as shown in Figure 3, now the air-out direction of outdoor fan and ambient wind, in opposite directions, can be accelerated the heat transfer rate of heat exchanger.
S704, according to the wind speed of ambient wind, determine the rotating speed of outdoor fan;
In the present embodiment, consider that the type of the outdoor fan that different air-conditioners is selected is different, what have selects infinitely variable speeds blower fan, and what have selects multistep speed regulation blower fan, and what have selects single speed blower fan.Therefore,, for dissimilar outdoor fan, the present embodiment proposes following several preferred modes of speed regulation:
(1), when outdoor fan is infinitely variable speeds blower fan, can utilize following formula to calculate the rotating speed R of outdoor fan:
Work as V
fduring <A,
;
Work as V
fduring>=A, R=0, outdoor fan is shut down.
Wherein,
A is for meeting the heat exchange requirement of outdoor unit heat exchanger, the default air speed value through heat exchanger surface, and described air speed value A can obtain by test.As a kind of preferred design of the present embodiment, when ambient wind blows to air outlet by the air inlet of off-premises station, described A is value between 1.5 ~ 3.0m/s preferably; When ambient wind blows to air inlet by the air outlet of off-premises station, described A is value between 4.5 ~ 6.0m/s preferably.
R
hit is the maximum (top) speed of outdoor fan; This numerical value R
hcan obtain by searching the technical manual of blower fan.
R
lit is the minimum speed of outdoor fan; This numerical value R
lalso can obtain by searching the technical manual of blower fan.
Consider in the situation that outdoor environment wind speed is larger, even if do not start outdoor fan, only utilize ambient wind can meet the situation of heat exchanger heat exchange requirement, the present embodiment is set and is worked as V
fduring>=A, being blown into ambient wind in off-premises station can shut down by controlling outdoor fan when meeting the heat exchange of outdoor unit heat exchanger and require completely, to reduce the Overall Power Consumption of air-conditioner, reaches energy-saving and cost-reducing designing requirement.
(2) when outdoor fan is multistep speed regulation blower fan, (by a plurality of gears are set, control outdoor fan and operate on a plurality of different rotating speeds), can adopt following two kinds of speed control strategies:
The first: first utilize the rotating speed computing formula of above-mentioned (1) described infinitely variable speeds blower fan to calculate the rotating speed R of outdoor fan, then determine the gear of outdoor fan according to rotating speed R.Because the rotating speed that the different gears of multistep speed regulation blower fan are corresponding is different, if the rotating speed R calculating just between two grades of wind speed, chooses in two grades the wind speed operation of larger a grade, fully to guarantee heat exchange requirement.
In like manner, work as V
fduring>=A, control outdoor fan and shut down, to reduce Overall Power Consumption.
It two is: ambient wind velocity is divided into several intervals, sets outdoor fan operate in different gears for different intervals.The three-step timing blower fan of take is specifically described as example, and outdoor fan may operate in high, medium and low three gears, and concrete control strategy is as follows:
If 1. ambient wind blows to air outlet by the air inlet of off-premises station, component V0 be on the occasion of, and ambient wind velocity is when in rising trend, the absolute value V of the component in X-direction according to ambient wind velocity V
fthe gear of determining outdoor fan is as follows, shown in Fig. 8:
If ambient wind velocity is lower, make V
f≤ V
11, V
11value between 1.0 ~ 1.5m/s, the gear that outdoor fan is set is high tap position, control outdoor fan and run up, the corresponding rotating speed of described high tap position can be in the scope of 820 ~ 880rpm value;
If ambient wind velocity rises, make V
fsurpass V
11time, i.e. V
11<V
f≤ V
12, V
12value between 1.5 ~ 2.0m/s, the gear that outdoor fan is set is middle gear, controls the running of outdoor fan middling speed, the corresponding rotating speed of described middle gear can be in the scope of 650 ~ 720rpm value;
If ambient wind velocity continues to rise, make V
fsurpass V
12time, i.e. V
12<V
f≤ V
13, V
13value between 2.0 ~ 3.0m/s, the gear that outdoor fan is set is low-grade location, controls outdoor fan low-speed running, the corresponding rotating speed of described low-grade location can be in the scope of 450 ~ 550rpm value;
If ambient wind velocity increases, make V
fsurpass V
13, i.e. V
f>V
13, control outdoor fan and shut down, directly utilize ambient wind for heat exchanger heat exchange.
If 2. ambient wind blows to air outlet by the air inlet of off-premises station, but ambient wind velocity is on a declining curve, the speed control strategy of outdoor fan is:
If current outdoor fan is shut down, and V
f>V
14, V
14value between 1.5 ~ 2.0m/s, keeps outdoor fan in stopped status;
If ambient wind velocity declines, make V
fdrop to V
14, control outdoor fan and start, and work as V
15<V
f≤ V
14, V
15between 1.0 ~ 1.5m/s, during value, control outdoor fan with low-grade location low-speed running;
If ambient wind velocity continues to decline, make V
16<V
f≤ V
15, V
16value between 0.5 ~ 1.0m/s, controls outdoor fan and turns round with middle gear middling speed;
If ambient wind velocity declines, make V
f≤ V
16, control outdoor fan and run up with high tap position.
If 3. ambient wind blows to air inlet by the air outlet of off-premises station, component V0 is negative value, and ambient wind velocity is when in rising trend, the absolute value V of the component in X-direction according to ambient wind velocity V
fthe gear of determining outdoor fan is as follows, shown in Fig. 9:
When ambient wind velocity is lower, i.e. V
f≤ V
21, V
21between 4.0 ~ 4.5m/s, during value, control outdoor fan and run up with high tap position;
When ambient wind velocity raises, make V
21<V
f≤ V
22, V
22between 4.5 ~ 5.0m/s, during value, control outdoor fan and turn round with middle gear middling speed;
When ambient wind velocity continues to raise, make V
22<V
f≤ V
23, V
23between 5.0 ~ 6.0m/s, during value, control outdoor fan with low-grade location low-speed running;
And be elevated to enough when large i.e. V when ambient wind velocity
f>V
23time, control outdoor fan and shut down, directly utilize ambient wind for heat exchanger heat exchange.
If 4. ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is on a declining curve,
If current outdoor fan is shut down, and V
f>V
24, V
24between 4.5 ~ 5.0m/s, during value, keep outdoor fan in stopped status, still adopting ambient wind is heat exchanger heat exchange;
If ambient wind velocity declines, make V
fdrop to V
24, control outdoor fan and start, and at V
25<V
f≤ V
24, V
25between 4.0 ~ 4.5m/s, during value, control outdoor fan with low-grade location low-speed running;
When ambient wind velocity declines, make V
26<V
f≤ V
25, V
26between 3.5 ~ 4.0m/s, during value, control outdoor fan and turn round with middle gear middling speed;
And when ambient wind velocity drops to reduced levels, i.e. V
f≤ V
26time, control outdoor fan and run up with high tap position, to guarantee the heat exchange requirement of heat exchanger.
For assurance system is reliable, stable operation, 2 points below should considering in the rotating speed control of outdoor fan:
The first, for preventing that the rotating speed of outdoor fan from frequently switching, V
11should not be less than V
16, V
12should not be less than V
15, V
13should not be less than V
14, V
21should not be less than V
26, V
22should not be less than V
25, V
23should not be less than V
24.If outdoor fan is multistep speed regulation blower fan or infinitely variable speeds blower fan, should require outdoor fan continuous operation under a certain wind speed after a period of time, just to allow to change wind speed.
It two is, under outdoor fan Reversion, to set each interval critical condition value V
21, V
22, V
23, V
24, V
25, V
26should be greater than each interval critical condition value V in off-premises station forward situation
11, V
12, V
13, V
14, V
15, V
16, and be at least greater than 2 ~ 3 times, even larger.This is mainly for the consideration to following two aspect factors:
A, when the air-out direction of ambient wind when with outdoor fan forward is relative, through the effective wind rate of outdoor unit heat exchanger, be less than when the effective wind rate of the air-out direction of ambient wind when with outdoor fan forward in opposite directions time;
The refrigerant flow path of b, outdoor unit heat exchanger generally considers according to when refrigeration, and during air-conditioner refrigerating operaton, refrigerant first passes through interior row, then passes through outer row, and in outdoor fan forward situation, air-out is contrary with the refrigerant flow direction, and the coefficient of heat transfer is larger; And under outdoor fan Reversion, air-out is consistent with the refrigerant flow direction, the coefficient of heat transfer is less.Therefore,, for meeting heat exchange requirement, need to be achieved by improving air quantity.Certainly, for heat exchanger, be single situation, this point can not considered.
(3) when described outdoor fan is single speed blower fan; can only be according to the blower fan of unique fixed rotating speed running; its method of operation can be controlled according to the second control strategy of the multistep speed regulation blower fan above-mentioned (2) Suo Shu; difference is; with the condition of shutting down and run up, judge; when being judged as when high, medium and low, all according to outdoor fan running, process.?
If 1. ambient wind blows to air outlet by the air inlet of off-premises station, component V0 be on the occasion of, and ambient wind velocity is in rising trend,
When ambient wind velocity is lower, i.e. V
f≤ V
13, V
13between 2.0 ~ 3.0m/s, during value, control outdoor fan and start running;
When ambient wind velocity raises, make V
f>V
13time, control outdoor fan and shut down, directly utilize the heat exchange of ambient wind heat exchanger;
If 2. ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is when on a declining curve,
If current outdoor fan is shut down, and V
f>V
14, V
14value between 1.5 ~ 2.0m/s, keeps outdoor fan in stopped status;
If ambient wind velocity declines, make V
fdrop to V
14, control outdoor fan and start operation, with ambient wind, be heat exchanger heat exchange together;
If 3. ambient wind blows to air inlet by the air outlet of off-premises station, component V0 is negative value, and ambient wind velocity is when in rising trend,
When ambient wind velocity lower, V
f≤ V
23, V
23between 5.0 ~ 6.0m/s, during value, control outdoor fan and start running, with fixed rotating speed, turn round;
When ambient wind velocity raises, make V
f>V
23time, control outdoor fan and shut down, by ambient wind, be directly outdoor unit heat exchanger heat exchange;
If 4. ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is on a declining curve,
If current outdoor fan is shut down, and V
f>V
24, V
24value between 4.5 ~ 5.0m/s, keeps outdoor fan in stopped status;
If ambient wind velocity declines, make V
fdrop to V
24, control outdoor fan and start running, be heat exchanger blowing heat exchange.
S705, judge whether to receive halt instruction, if do not receive halt instruction, return to that the turning to of outdoor fan carried out in step S703 circulation, rotating speed is controlled; If receive halt instruction, control off-premises station complete machine and shut down.
The present embodiment, for the working environment of air-conditioner outdoor unit, to the rotating speed of outdoor fan and turn-around design control strategy, under the prerequisite requiring, can effectively reduce the power consumption of off-premises station in the heat exchange that meets outdoor unit heat exchanger, realizes the efficient operation of air-conditioning products.
Certainly; the above is only a kind of preferred embodiment of the present invention, for those skilled in the art, and under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
- According to ambient wind to a method of controlling air-conditioner outdoor fan, it is characterized in that: testing environment wind direction, when ambient wind blows to air outlet by the air inlet of off-premises station, arranges turning to for forward, by air outlet of outdoor fan; When ambient wind blows to air inlet by the air outlet of off-premises station, turning to for reversion, by air inlet air-out of outdoor fan is set.
- According to claim 1 according to ambient wind to the method for controlling air-conditioner outdoor fan, it is characterized in that: the air-out direction during by outdoor fan forward is set as X-direction, testing environment wind speed, when ambient wind velocity the component of X-axis be on the occasion of time, judge that ambient wind blows to air outlet by the air inlet of off-premises station; When ambient wind velocity is when the component of X-axis is negative value, judge that ambient wind blows to air inlet by the air outlet of off-premises station.
- According to claim 1 and 2 according to ambient wind to the method for controlling air-conditioner outdoor fan, it is characterized in that: the rotating speed R of outdoor fan is calculated and generated by following formula:Work as V fduring <A, ;Work as V fduring>=A, R=0;Wherein, V f: the absolute value of ambient wind velocity component on air-out direction when outdoor fan forward;A: for meeting the heat exchange requirement of outdoor unit heat exchanger, the default air speed value through heat exchanger surface;R h: outdoor fan maximum (top) speed;R l: outdoor fan minimum speed.
- According to claim 3 according to ambient wind to the method for controlling air-conditioner outdoor fan, it is characterized in that: when ambient wind blows to air outlet by the air inlet of off-premises station, described A value between 1.5 ~ 3.0m/s; When ambient wind blows to air inlet by the air outlet of off-premises station, described A value between 4.5 ~ 6.0m/s.
- According to claim 4 according to ambient wind to the method for controlling air-conditioner outdoor fan, it is characterized in that: when described outdoor fan is multistep speed regulation blower fan, first utilize the rotating speed computing formula of outdoor fan to calculate the rotating speed R of outdoor fan, then according to rotating speed R, determine the gear of outdoor fan; If rotating speed R between two grades of wind speed time, chooses in two grades the wind speed operation of large a grade.
- According to claim 1 and 2 according to ambient wind to the method for controlling air-conditioner outdoor fan, it is characterized in that: when described outdoor fan is three-step timing blower fan, if ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is in rising trend, according to the absolute value V of ambient wind velocity component on air-out direction when the outdoor fan forward fdetermine the gear of outdoor fan:If V f≤ V 11, V 11value between 1.0 ~ 1.5m/s, the gear that outdoor fan is set is high tap position, controls outdoor fan and runs up, rotating speed value in the scope of 820 ~ 880rpm that described high tap position is corresponding;If V 11<V f≤ V 12, V 12value between 1.5 ~ 2.0m/s, the gear that outdoor fan is set is middle gear, controls the running of outdoor fan middling speed, rotating speed value in the scope of 650 ~ 720rpm that described middle gear is corresponding;If V 12<V f≤ V 13, V 13value between 2.0 ~ 3.0m/s, the gear that outdoor fan is set is low-grade location, controls outdoor fan low-speed running, rotating speed value in the scope of 450 ~ 550rpm that described low-grade location is corresponding;If V f>V 13, control outdoor fan and shut down.
- According to claim 6 according to ambient wind to the method for controlling air-conditioner outdoor fan, it is characterized in that: if ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is on a declining curve,If current outdoor fan is shut down, and V f>V 14, V 14value between 1.5 ~ 2.0m/s, keeps outdoor fan in stopped status;If V fdrop to V 14, control outdoor fan and start, and work as V 15<V f≤ V 14, V 15between 1.0 ~ 1.5m/s, during value, control outdoor fan low-speed running;Work as V 16<V f≤ V 15, V 16between 0.5 ~ 1.0m/s, during value, control the running of outdoor fan middling speed;Work as V f≤ V 16time, control outdoor fan and run up.
- According to claim 6 according to ambient wind to the method for controlling air-conditioner outdoor fan, it is characterized in that: if ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is in rising trend,Work as V f≤ V 21, V 21between 4.0 ~ 4.5m/s, during value, control outdoor fan and run up;Work as V 21<V f≤ V 22, V 22between 4.5 ~ 5.0m/s, during value, control the running of outdoor fan middling speed;Work as V 22<V f≤ V 23, V 23between 5.0 ~ 6.0m/s, during value, control outdoor fan low-speed running;Work as V f>V 23time, control outdoor fan and shut down.
- According to claim 8 according to ambient wind to the method for controlling air-conditioner outdoor fan, it is characterized in that: if ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is on a declining curve,If current outdoor fan is shut down, and V f>V 24, V 24value between 4.5 ~ 5.0m/s, keeps outdoor fan in stopped status;If V fdrop to V 24, control outdoor fan and start, and at V 25<V f≤ V 24, V 25between 4.0 ~ 4.5m/s, during value, control outdoor fan low-speed running;Work as V 26<V f≤ V 25, V 26between 3.5 ~ 4.0m/s, during value, control the running of outdoor fan middling speed;Work as V f≤ V 26time, control outdoor fan and run up.
- According to claim 1 and 2 according to ambient wind to the method for controlling air-conditioner outdoor fan, it is characterized in that: when described outdoor fan is single speed blower fan, set V ffor the absolute value of ambient wind velocity V component on air-out direction when the outdoor fan forward,If a ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is in rising trend,Work as V f≤ V 13, V 13between 2.0 ~ 3.0m/s, during value, control outdoor fan running;Work as V f>V 13time, control outdoor fan and shut down;If b ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is on a declining curve,If current outdoor fan is shut down, and V f>V 14, V 14value between 1.5 ~ 2.0m/s, keeps outdoor fan in stopped status;If V fdrop to V 14, control outdoor fan and start running;If c ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is in rising trend,Work as V f≤ V 23, V 23between 5.0 ~ 6.0m/s, during value, control outdoor fan running;Work as V f>V 23time, control outdoor fan and shut down;If d ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is on a declining curve,If current outdoor fan is shut down, and V f>V 24, V 24value between 4.5 ~ 5.0m/s, keeps outdoor fan in stopped status;If V fdrop to V 24, control outdoor fan and start running.
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| CN201210582643.2A CN102997373B (en) | 2012-12-28 | 2012-12-28 | Method for controlling outdoor fan of air conditioner according to environmental wind direction |
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| CN102997373B true CN102997373B (en) | 2014-11-05 |
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