CN102997373A - 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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- CN102997373A CN102997373A CN2012105826432A CN201210582643A CN102997373A CN 102997373 A CN102997373 A CN 102997373A CN 2012105826432 A CN2012105826432 A CN 2012105826432A CN 201210582643 A CN201210582643 A CN 201210582643A CN 102997373 A CN102997373 A CN 102997373A
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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 the air conditioning and refrigeration field of engineering technology, specifically, relate to a kind of method for the outdoor fan of air-conditioner being implemented control.
Background technology
In present 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 are 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 that discharges by heat exchanger utilizes outdoor fan promptly to be dispersed in the air.For traditional air-conditioner outdoor fan, it turns to all and fixes, and rotating speed only is subjected to the control of air-conditioner self-operating situation, is not subjected 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 the off-premises station heat transfer effect poor, impact refrigeration or the effect that heats;
(2) if extraneous ambient wind to the air-out direction of 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 this moment is because outdoor fan still in running, so will produce idle work, causes 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 the 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:
A kind of according to the method for ambient wind to control air-conditioner outdoor fan, testing environment wind direction at first when ambient wind is air inlet by off-premises station when blowing to air outlet, arranges turning to of outdoor fan and is forward, by air outlet; When ambient wind is air outlet by off-premises station when blowing to air inlet, turning to for counter-rotating, by the air inlet air-out of outdoor fan is set.
As ambient wind to a kind of preferred judgment mode, the air-out direction during with the outdoor fan forward is set as X-direction, the testing environment wind speed, when ambient wind velocity the component of X-axis be on the occasion of the time, judge that ambient wind blows to air outlet by the air inlet of off-premises station; When ambient wind velocity 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 the infinitely variable speeds blower fan, the rotating speed R of outdoor fan can calculate by following formula and generate:
Work as V
FDuring≤A,
Work as V
FDuring 〉=A, R=0;
Wherein, V
F: the absolute value of ambient wind velocity component on the air-out direction when the outdoor fan forward;
A: for satisfying the heat exchange requirement of outdoor unit heat exchanger, the default air speed value through heat exchanger surface;
R
H: the outdoor fan maximum (top) speed;
R
L: the 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 the multistep speed regulation blower fan, at first utilize the rotating speed computing formula of above-mentioned outdoor fan to calculate the rotating speed R of outdoor fan, then determine the gear of outdoor fan according to rotating speed R; If rotating speed R between two grades of wind speed the time, then chooses wind speed operation large a grade in two grades.
3, when described outdoor fan is the 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, then according to the absolute value V of ambient wind velocity component on the 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 then is set is high tap position, the control outdoor fan runs 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 then is set is middle gear, the running of control 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 then is set is low-grade location, control outdoor fan low-speed running, rotating speed corresponding to described low-grade location can be in the scope of 450 ~ 550rpm value;
If V
FV
13, then 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, then
If current outdoor fan is shut down, and V
FV
14, V
14Value between 1.5 ~ 2.0m/s then keeps outdoor fan to be in stopped status;
If V
FDrop to V
14, then 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, the running of control outdoor fan middling speed;
Work as V
F≤ V
16The time, the control outdoor fan runs up.
If ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is in rising trend, then
Work as V
F≤ V
21, V
21During value, the control outdoor fan runs up between 4.0 ~ 4.5m/s;
Work as V
21＜V
F≤ V
22, V
22Between 4.5 ~ 5.0m/s during value, the running of control 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
FV
23The time, the control outdoor fan is 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, then
If current outdoor fan is shut down, and V
FV
24, V
24Value between 4.5 ~ 5.0m/s then keeps outdoor fan to be in stopped status;
If V
FDrop to V
24, then 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, the running of control outdoor fan middling speed;
Work as V
F≤ V
26The time, the control outdoor fan runs up.
4, when described outdoor fan is the single speed blower fan, set V
FBe the absolute value of ambient wind velocity V component on the air-out direction when the outdoor fan forward, then
If a ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is in rising trend, then
Work as V
F≤ V
13, V
13Between 2.0 ~ 3.0m/s during value, the running of control outdoor fan;
Work as V
FV
13The time, the control outdoor fan is shut down;
If the b ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is on a declining curve, then
If current outdoor fan is shut down, and V
FV
14, V
14Value between 1.5 ~ 2.0m/s then keeps outdoor fan to be in stopped status;
If V
FDrop to V
14, then control outdoor fan and start running;
If the c ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is in rising trend, then
Work as V
F≤ V
23, V
23Between 5.0 ~ 6.0m/s during value, the running of control outdoor fan;
Work as V
FV
23The time, the control outdoor fan is shut down;
If the d ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is on a declining curve, then
If current outdoor fan is shut down, and V
FV
24, V
24Value between 4.5 ~ 5.0m/s then keeps outdoor fan to be in stopped status;
If V
FDrop to V
24, then 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 the air-conditioner outdoor fan, can make full use of the natural resources system according to the ambient wind in the external world, realizes the efficient operation of air-conditioner.When relative with the air-out wind direction of conventional air conditioner, shut down or make outdoor fan counter-rotating by the control outdoor fan in ambient wind, can avoid air quantity to reduce even can improve air quantity, guarantee the abundant heat exchange of heat exchanger; To with the air-out wind direction of conventional air conditioner in opposite directions the time, shut down or reduce the rotating speed of outdoor fan by the control outdoor fan in ambient wind, when guaranteeing heat exchange efficiency, can so that the operate power of air-conditioner complete machine reduces, play energy-efficient effect.
After reading by reference to the accompanying drawings the detailed description of embodiment of the present invention, other characteristics of the present invention and advantage will become clearer.
Description of drawings
The air-out wind direction that Fig. 1 is ambient wind to the outdoor fan forward time over against the time the wind direction schematic diagram;
Wind direction schematic diagram when the air-out wind direction that Fig. 2 is ambient wind to the outdoor fan forward time is consistent;
The air-out wind direction that Fig. 3 is ambient wind to the outdoor fan forward time is non-over against the wind direction schematic diagram when consistent;
Fig. 4 is the installation site schematic diagram of the wind speed/a kind of embodiment of 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 proposed by the invention according to the control flow chart of ambient wind to a kind of embodiment of control air-conditioner outdoor fan;
Fig. 8 is to be the three-step timing blower fan for outdoor fan, and ambient wind is when 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 the three-step timing blower fan for outdoor fan, and ambient wind is when 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.
Present embodiment is for present air-conditioner, the air-out direction of its off-premises station is fixed, and the outdoor environment wind direction has very strong randomness, thereby affect the problem of off-premises station heat transfer effect, a kind of technology that can automatically regulate according to the variation of outdoor environment wind direction the air-out direction of air-conditioner outdoor fan has been proposed, and then under the prerequisite that guarantees the abundant heat exchange of heat exchanger, significantly reduced the operation power consumption of off-premises station, realized the efficient operation of air-conditioner complete machine.
As shown in Figure 4, regulate in order to realize the intellectuality that outdoor fan turns to, present embodiment at first 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 the off-premises station, and then utilize primary control program to determine the air-out direction that outdoor fan is suitable, realize the commutation control to outdoor fan.
For present 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, the air inlet operated by rotary motion is on the backboard of outdoor set cabinet, outdoor fan 5 is installed in the casing, when the outdoor fan forward, by the air inlet air draught, by air outlet 4 outside air drafts.Be subjected to outdoor fan 5 to go out Wind effect for fear of measuring instrument 2, present embodiment preferably is installed in the outside of outdoor set cabinet with described measuring instrument 2, and is positioned on the top board 1 of casing, to guarantee that ambient wind is to the accuracy that detects.For the consideration of off-premises station overall aesthetics aspect, present embodiment preferably is installed in described measuring instrument 2 middle part of casing top board 1, referring to shown in Figure 5.
Certainly, described measuring instrument 2 also can be installed in 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, present embodiment be not limited in above for example.
The wind direction detection signal that measuring instrument 2 is detected output transfers to the controller on the off-premises station master control borad, be used for control signal that control outdoor fan turn to according to ambient wind to generating by controller, export drive circuit to, and then by the driving control of drive circuit realization to outdoor fan, 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 namely the air-out direction of ambient wind to the outdoor fan forward time is relative, for example shown in Figure 1 over against situation, then control the outdoor fan counter-rotating, by air outlet air draught, the air inlet air-out of off-premises station.At this moment, the air-out of ambient wind and outdoor fan blows to heat exchanger in the off-premises station together, and the air quantity by heat exchanger is increased, and improves heat exchange efficiency.Otherwise when ambient wind blowed to the air inlet of off-premises station, namely the air-out direction of ambient wind to the outdoor fan forward time was in opposite directions the time, and for example consistent situation shown in Figure 2 is then controlled the outdoor fan forward, by air inlet air draught, the air outlet of off-premises station.At this moment, ambient wind blows to the heat exchanger in the 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 the heat transfer rate.
In order to satisfy the commutation requirement of outdoor fan, for transducer air conditioning, can select the three-phase alternating current blower fan as described outdoor fan, be used for heat exchanger and dispel the heat.As shown in Figure 6, in order to realize the driving control to the three-phase alternating current blower fan, present embodiment has designed frequency converter and reversing switch K1, K2 in drive circuit.Will be by three-phase alternating-current supply U, the V of frequency converter output, W transfers to the three-phase alternating current blower fan via reversing switch K1, K2 feeder ear.Described reversing switch K1, K2 preferably adopt A.C. contactor to carry out circuit design, receive controller according to the switch controlling signal of ambient wind to generation and output, and then by control reversing switch K1 conducting, K2 shutoff (perhaps reversing switch K2 conducting, K1 turn-off), change the sequential of the three-phase alternating-current supply that is applied to the three-phase alternating current blower fan, realize the commutation control to the three-phase alternating current blower fan.
In order to guarantee safe power supply, need two groups of A.C. contactor K1, K2 are carried out interlocking design in circuit design, the i.e. normally-closed contact of series connection A.C. contactor K2 in the coil power supply loop of A.C. contactor K1, and the normally-closed contact of the A.C. contactor K1 that in the coil power supply loop of A.C. contactor K2, connects, 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 counter-rotating.
For when improving heat transfer effect, reduce the power consumption of outdoor fan, present embodiment also is provided with wind speed detection device on described off-premises station, preferably be built in the described measuring instrument 2, namely select wind speed/wind direction measuring instrument to be installed on the top board 1 of outdoor set cabinet, with satisfy to ambient wind to the synchronous testing requirement of ambient wind velocity.
To detect the wind speed detection signal of exporting by wind speed/wind direction measuring instrument and transfer to outdoor controller, generate speed controling signal by controller according to the wind speed size, export the frequency converter in the drive circuit to, change the frequency of the AC power that exports outdoor fan to by frequency converter, and then realize the intellectuality of outdoor fan rotating speed is regulated.
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 transfer to dc fan by drive circuit, to realize that dc fan is turned to adjusting with rotating speed.
Based on the structural design of above-mentioned air-conditioner outdoor unit, below in conjunction with Fig. 7 turning to the concrete control method of rotating speed of air-conditioner outdoor fan at length set forth.
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, preferably utilize ambient wind velocity V component of air-out direction when the outdoor fan forward to judge for the detection of outdoor environment wind direction, as shown in Figure 3.What arrange on the front panel of setting outdoor set cabinet is air outlet, what arrange on the backboard is air inlet, certainly, also air inlet can be set simultaneously also on the side plate of the left and right sides of casing, 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 on X-axis during with the outdoor fan forward, be V0=v*cos α, v is the absolute value of ambient wind velocity size.If component V0 is negative value, judge that then ambient wind blows to air inlet by the air outlet of off-premises station, the air-out direction during namely with the outdoor fan forward is relative.Fig. 1 show the air-out wind direction of ambient wind to the outdoor fan forward time over against limiting case, namely the angle between the two is 180 °, this moment V0=-v, the wind speed that blows to off-premises station is maximum.If component V0 be on the occasion of, judge that then ambient wind blows to air outlet by the air inlet of off-premises station, the air-out direction during namely with the outdoor fan forward in opposite directions.Fig. 2 shows the air-out wind direction consistent limiting case of ambient wind to the outdoor fan forward time, and namely the angle between the two is 0 °, this moment V0=v.
For the wind speed size that is blown into the ambient wind in the off-premises station, the present embodiment absolute value V of component V0
FRepresent.
S703, according to ambient wind to determining turning to of outdoor fan;
In the present embodiment, in order to take full advantage of ambient wind the heat exchanger in the off-premises station is carried out heat exchange, when detecting the air outlet of ambient wind by off-premises station and blow to air inlet, be component V0 when being negative value, the counter-rotating of control outdoor fan is from the air outlet air draught, the 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 detecting the air inlet of ambient wind by off-premises station and blow to air outlet, be component V0 on the occasion of the time, control outdoor fan forward, make outdoor fan by the air inlet air draught, air outlet air draft, i.e. air-out direction X-direction as shown in Figure 3, the air-out direction of outdoor fan and ambient wind can be accelerated the heat transfer rate of heat exchanger in opposite directions at this moment.
S704, determine the rotating speed of outdoor fan according to the wind speed of ambient wind;
In the present embodiment, consider that the type of the outdoor fan that different air-conditioners is selected is different, what have selects the infinitely variable speeds blower fan, and what have selects the multistep speed regulation blower fan, and what have then selects the single speed blower fan.Therefore, for dissimilar outdoor fans, present embodiment proposes following several preferred modes of speed regulation:
(1) when outdoor fan is the 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, namely outdoor fan is shut down.
Wherein,
A is for satisfying 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 present embodiment, when ambient wind blowed 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 blowed 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 the technical manual of searching blower fan.
R
LIt is the minimum speed of outdoor fan; This numerical value R
LAlso can obtain by the technical manual of searching blower fan.
Consider that in the larger situation of outdoor environment wind speed even do not start outdoor fan, only utilize ambient wind can satisfy the situation of heat exchanger heat exchange requirement, present embodiment is set and worked as V
FDuring 〉=A, when namely being blown into ambient wind in the off-premises station and can requiring with the heat exchange of satisfying outdoor unit heat exchanger completely, shut down by the control outdoor fan, to reduce the Overall Power Consumption of air-conditioner, reach energy-saving and cost-reducing designing requirement.
(2) when outdoor fan is the multistep speed regulation blower fan, (controls outdoor fan and operate on a plurality of different rotating speeds by a plurality of gears are set), can adopt following two kinds of speed control strategies:
The first: at 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 that calculates just between two grades of wind speed, then chooses wind speed operation larger a grade in two grades, with abundant assurance heat exchange requirement.
In like manner, work as V
FDuring 〉=A, the control outdoor fan is shut down, to reduce Overall Power Consumption.
It two is: ambient wind velocity is divided into several intervals, sets outdoor fan for different intervals and operate in different gears.Be specifically described as an example of the three-step timing blower fan example, namely 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, namely component V0 be on the occasion of, and ambient wind velocity is when in rising trend, then according to the absolute value V of the component of ambient wind velocity V on X-direction
FThe gear of determining outdoor fan is as follows, in conjunction with shown in Figure 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 then is set is high tap position, the control outdoor fan runs 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
11The time, i.e. V
11＜V
F≤ V
12, V
12Value between 1.5 ~ 2.0m/s, the gear that outdoor fan then is set is middle gear, the running of control 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
12The time, i.e. V
12＜V
F≤ V
13, V
13Value between 2.0 ~ 3.0m/s, the gear that outdoor fan then is set is low-grade location, control 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
FSuper to V
13, i.e. V
FV
13, then control outdoor fan and shut down, directly utilize ambient wind to be the 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, then the speed control strategy of outdoor fan is:
If current outdoor fan is shut down, and V
FV
14, V
14Value between 1.5 ~ 2.0m/s then keeps outdoor fan to be in stopped status;
If ambient wind velocity descends, make V
FDrop to V
14, then control outdoor fan and start, and work as V
15＜V
F≤ V
14, V
15During value, the control outdoor fan is with the low-grade location low-speed running between 1.0 ~ 1.5m/s;
If ambient wind velocity continues to descend, make V
16＜V
F≤ V
15, V
16Value between 0.5 ~ 1.0m/s is then controlled outdoor fan and is turned round with middle gear middling speed;
If ambient wind velocity descends, make V
F≤ V
16, then 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, namely component V0 is negative value, and ambient wind velocity is when in rising trend, then according to the absolute value V of the component of ambient wind velocity V on X-direction
FThe gear of determining outdoor fan is as follows, in conjunction with shown in Figure 9:
When ambient wind velocity is low, i.e. V
F≤ V
21, V
21During value, the control outdoor fan runs up with high tap position between 4.0 ~ 4.5m/s;
When ambient wind velocity raises, make V
21＜V
F≤ V
22, V
22During value, the control outdoor fan turns round with middle gear middling speed between 4.5 ~ 5.0m/s;
When ambient wind velocity continues to raise, make V
22＜V
F≤ V
23, V
23During value, the control outdoor fan is with the low-grade location low-speed running between 5.0 ~ 6.0m/s;
And be elevated to enough when large i.e. V when ambient wind velocity
FV
23The time, the control outdoor fan is shut down, and directly utilizes ambient wind to be the 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, then
If current outdoor fan is shut down, and V
FV
24, V
24During value, then keep outdoor fan to be in stopped status between 4.5 ~ 5.0m/s, still adopting ambient wind is the heat exchanger heat exchange;
If ambient wind velocity descends, make V
FDrop to V
24, then control outdoor fan and start, and at V
25＜V
F≤ V
24, V
25During value, the control outdoor fan is with the low-grade location low-speed running between 4.0 ~ 4.5m/s;
When ambient wind velocity descends, make V
26＜V
F≤ V
25, V
26During value, the control outdoor fan turns round with middle gear middling speed between 3.5 ~ 4.0m/s;
And when ambient wind velocity drops to reduced levels, i.e. V
F≤ V
26The time, the control outdoor fan runs up with high tap position, to guarantee the heat exchange requirement of heat exchanger.
For the assurance system is reliable, stable operation, in the rotating speed control of outdoor fan, should consider following 2 points:
The first, for the rotating speed that prevents outdoor fan frequently switches, V
11Should be less than V
16, V
12Should be less than V
15, V
13Should be less than V
14, V
21Should be less than V
26, V
22Should be less than V
25, V
23Should be less than V
24If outdoor fan is multistep speed regulation blower fan or infinitely variable speeds blower fan, then should require outdoor fan just to allow to change wind speed after a period of time at continuous operation under a certain wind speed.
It two is under the 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 the off-premises station forward situation
11, V
12, V
13, V
14, V
15, V
16, and at least greater than 2 ~ 3 times, even larger.This mainly is for the consideration to following two aspect factors:
A, when the air-out direction of ambient wind to the outdoor fan forward time is relative, through the effective wind rate of outdoor unit heat exchanger less than when the effective wind rate of the air-out direction of ambient wind to the outdoor fan forward time in opposite directions the time;
The refrigerant flow path of b, outdoor unit heat exchanger generally considers according to when refrigeration, and namely during the air-conditioner refrigerating operaton, refrigerant passes through first interior row, and through effluxing, in the outdoor fan forward situation, air-out is opposite with the refrigerant flow direction again, and the coefficient of heat transfer is larger; And under the outdoor fan Reversion, air-out is consistent with the refrigerant flow direction, and the coefficient of heat transfer is less.Therefore, for satisfying the heat exchange requirement, need to be achieved by improving air quantity.Certainly, be single situation for heat exchanger, this point can not considered.
(3) when described outdoor fan is the single speed blower fan; namely 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 above-mentioned (2) described multistep speed regulation blower fan; difference is; judge with the condition of shutting down and run up; when being judged as when high, medium and low, all process according to the outdoor fan running.Namely
If 1. ambient wind blows to air outlet by the air inlet of off-premises station, namely component V0 be on the occasion of, and ambient wind velocity is in rising trend, then
When ambient wind velocity is low, i.e. V
F≤ V
13, V
13During value, the control outdoor fan starts running between 2.0 ~ 3.0m/s;
When ambient wind velocity raises, make V
FV
13The time, the control outdoor fan is shut down, and directly utilizes 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, then
If current outdoor fan is shut down, and V
FV
14, V
14Value between 1.5 ~ 2.0m/s then keeps outdoor fan to be in stopped status;
If ambient wind velocity descends, make V
FDrop to V
14, then control outdoor fan and start operation, be the heat exchanger heat exchange together with ambient wind;
If 3. ambient wind blows to air inlet by the air outlet of off-premises station, namely component V0 is negative value, and ambient wind velocity is when in rising trend, then
When ambient wind velocity lower, V
F≤ V
23, V
23During value, the control outdoor fan starts running, turns round with fixed rotating speed between 5.0 ~ 6.0m/s;
When ambient wind velocity raises, make V
FV
23The time, the control outdoor fan is shut down, and is the outdoor unit heat exchanger heat exchange by ambient wind directly;
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, then
If current outdoor fan is shut down, and V
FV
24, V
24Value between 4.5 ~ 5.0m/s then keeps outdoor fan to be in stopped status;
If ambient wind velocity descends, make V
FDrop to V
24, then 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, then return step S703 circulation and carry out the turning to of outdoor fan, rotating speed control; If receive halt instruction, then control the off-premises station complete machine and shut down.
Present embodiment to rotating speed and the turn-around design control strategy of outdoor fan, under the prerequisite that the heat exchange of satisfying outdoor unit heat exchanger requires, can effectively reduce the power consumption of off-premises station for the working environment of air-conditioner outdoor unit, realizes the efficient operation of air-conditioning products.
Certainly; the above only is a kind of preferred embodiment of the present invention, for those skilled in the art, and under the prerequisite that does not break away from the principle 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)
1. one kind according to the method for ambient wind to control air-conditioner outdoor fan, it is characterized in that: the testing environment wind direction when ambient wind blows to air outlet by the air inlet of off-premises station, arranges turning to of outdoor fan and is forward, by air outlet; When ambient wind blows to air inlet by the air outlet of off-premises station, turning to for counter-rotating, by the air inlet air-out of outdoor fan is set.
2. according to claim 1 according to the method for ambient wind to control air-conditioner outdoor fan, it is characterized in that: the air-out direction during with the outdoor fan forward is set as X-direction, the testing environment wind speed, when ambient wind velocity the component of X-axis be on the occasion of the time, judge that ambient wind blows to air outlet by the air inlet of off-premises station; When ambient wind velocity 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.
3. according to claim 1 and 2 according to the method for ambient wind to control air-conditioner outdoor fan, it is characterized in that: the rotating speed R of outdoor fan calculates by following formula and generates:
Work as V
FDuring≤A,
Work as V
FDuring 〉=A, R=0;
Wherein, V
F: the absolute value of ambient wind velocity component on the air-out direction when the outdoor fan forward;
A: for satisfying the heat exchange requirement of outdoor unit heat exchanger, the default air speed value through heat exchanger surface;
R
H: the outdoor fan maximum (top) speed;
R
L: the outdoor fan minimum speed.
4. according to claim 3 according to the method for ambient wind to control 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.
5. according to claim 4 according to the method for ambient wind to control air-conditioner outdoor fan, it is characterized in that: when described outdoor fan is the multistep speed regulation blower fan, at first utilize the rotating speed computing formula of outdoor fan to calculate the rotating speed R of outdoor fan, then determine the gear of outdoor fan according to rotating speed R; If rotating speed R between two grades of wind speed the time, then chooses wind speed operation large a grade in two grades.
6. according to claim 1 and 2 according to the method for ambient wind to control air-conditioner outdoor fan, it is characterized in that: when described outdoor fan is the 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, then according to the absolute value V of ambient wind velocity component on the 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 then is set is high tap position, the control outdoor fan 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 then is set is middle gear, the running of control 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 then is set is low-grade location, control outdoor fan low-speed running, rotating speed value in the scope of 450 ~ 550rpm that described low-grade location is corresponding;
If V
FV
13, then control outdoor fan and shut down.
7. according to claim 6 according to the method for ambient wind to control 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, then
If current outdoor fan is shut down, and V
FV
14, V
14Value between 1.5 ~ 2.0m/s then keeps outdoor fan to be in stopped status;
If V
FDrop to V
14, then 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, the running of control outdoor fan middling speed;
Work as V
F≤ V
16The time, the control outdoor fan runs up.
8. according to claim 6 according to the method for ambient wind to control 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, then
Work as V
F≤ V
21, V
21During value, the control outdoor fan runs up between 4.0 ~ 4.5m/s;
Work as V
21＜V
F≤ V
22, V
22Between 4.5 ~ 5.0m/s during value, the running of control 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
FV
23The time, the control outdoor fan is shut down.
9. according to claim 8 according to the method for ambient wind to control 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, then
If current outdoor fan is shut down, and V
FV
24, V
24Value between 4.5 ~ 5.0m/s then keeps outdoor fan to be in stopped status;
If V
FDrop to V
24, then 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, the running of control outdoor fan middling speed;
Work as V
F≤ V
26The time, the control outdoor fan runs up.
10. according to claim 1 and 2 according to the method for ambient wind to control air-conditioner outdoor fan, it is characterized in that: when described outdoor fan is the single speed blower fan, set V
FBe the absolute value of ambient wind velocity V component on the air-out direction when the outdoor fan forward, then
If a ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is in rising trend, then
Work as V
F≤ V
13, V
13Between 2.0 ~ 3.0m/s during value, the running of control outdoor fan;
Work as V
FV
13The time, the control outdoor fan is shut down;
If the b ambient wind blows to air outlet by the air inlet of off-premises station, and ambient wind velocity is on a declining curve, then
If current outdoor fan is shut down, and V
FV
14, V
14Value between 1.5 ~ 2.0m/s then keeps outdoor fan to be in stopped status;
If V
FDrop to V
14, then control outdoor fan and start running;
If the c ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is in rising trend, then
Work as V
F≤ V
23, V
23Between 5.0 ~ 6.0m/s during value, the running of control outdoor fan;
Work as V
FV
23The time, the control outdoor fan is shut down;
If the d ambient wind blows to air inlet by the air outlet of off-premises station, and ambient wind velocity is on a declining curve, then
If current outdoor fan is shut down, and V
FV
24, V
24Value between 4.5 ~ 5.0m/s then keeps outdoor fan to be in stopped status;
If V
FDrop to V
24, then 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN102997373A true CN102997373A (en) | 2013-03-27 |
| CN102997373B CN102997373B (en) | 2014-11-05 |
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| CN201210582643.2A Expired - Fee Related 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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