CN107166642A - DC fan control method outside a kind of convertible frequency air-conditioner room - Google Patents
DC fan control method outside a kind of convertible frequency air-conditioner room Download PDFInfo
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- CN107166642A CN107166642A CN201710343438.3A CN201710343438A CN107166642A CN 107166642 A CN107166642 A CN 107166642A CN 201710343438 A CN201710343438 A CN 201710343438A CN 107166642 A CN107166642 A CN 107166642A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The present invention relates to the control technology of convertible frequency air-conditioner, it discloses DC fan control method outside a kind of convertible frequency air-conditioner room, solving the outer DC fan rotating speed in convertible frequency air-conditioner room in conventional art can not can not Optimum Matching, the problem of influenceing system capability and reliability with system.The present invention determines the initial speed of DC fan according to compressor frequency and outdoor environment temperature, during compressor operation, according to current system parameters such as outdoor coil temperature, IPM temperature, delivery temperature, environment temperatures, the rotating speed of adjustment DC fan, realizes the stepless time adjustment function of rotation speed of fan in real time.After compressor shutdown; detect outdoor coil temperature, IPM temperature; determine whether blower fan operates according to temperatures above, the duration of runs of blower fan operating rotating speed and blower fan; than compressor shutdown in former control program; blower fan is just shut down; the temperature of corresponding system can be quickly reduced, is conducive to the system recovery time of reduction compressor shutdown caused by system overheat, shortens the time interval that compressor is again started up.
Description
Technical field
The present invention relates to the control technology of convertible frequency air-conditioner, and in particular to DC fan controlling party outside a kind of convertible frequency air-conditioner room
Method.
Background technology
Good heat exchange is that air-conditioning system is normal, the premise of steady operation, and the outdoor DC fan of convertible frequency air-conditioner is used for
The heat exchange of outdoor evaporator, heat transfer effect is related to DC fan rotating speed, but increase DC fan rotating speed can be brought directly again simply
The extra power consumption of flow fan.Therefore, influence of the DC fan to system is very big, if the working speed of DC fan can
Best match system, has very big benefit to improving system energy efficiency.
The outdoor DC fan of convertible frequency air-conditioner has multiple wind speed shelves, and existing control program is different compressor operation frequencies
The different wind speed shelves of rate scope correspondence.It is general that when compressor is operated in a high frequency, DC fan is operated in top gear, compressor outside room
DC fan machine is operated in low or first gear outside room when low frequency is operated, and blower fan is also stopped when compressor shuts down.
There is problems with this control mode：1st, same compressor frequency, under different operating modes, system pressure is not
Together, the parameters of system are also different, and same rotation speed of fan does not adapt to all operating modes.2nd, compressor shutdown has a variety of
Reason, after because the excessively high Overheat Reasons of system overheat, plate temperature are shut down, if blower fan is also with shutdown, can cause overheat extensive
Complex velocity is slow, and influence compressor is again started up the time.If therefore the rotating speed control of outdoor DC fan it is simply simple and
Compressor frequency is associated, and can influence system capability and reliability.
The content of the invention
The technical problems to be solved by the invention are：DC fan control method outside a kind of convertible frequency air-conditioner room is proposed, is solved
DC fan rotating speed can not can not Optimum Matching, influence system capability and reliability with system outside convertible frequency air-conditioner room in conventional art
The problem of.
The technical solution adopted for the present invention to solve the technical problems is：
DC fan control method outside a kind of convertible frequency air-conditioner room, including：
A. the minimum speed N of DC fan outside convertible frequency air-conditioner room is determinedminWith maximum speed Nmax；
B. DC fan rotating speed and outdoor environment temperature and compressor frequency corresponding table are set up；
C. after air-conditioning start, according to compressor operation frequency and outdoor environment temperature, table look-up and obtain the initial of DC fan
Rotating speed N0；
D. compressor operating time reaches t1Afterwards, external disk temperature is detected, controls rotation speed of fan as follows according to external disk temperature：
If external disk temperature<T10, then DC fan rotating speed N=N0-N1If, N<Nmin, then N=Nmin；If external disk temperature
Degree>T11, DC fan rotating speed N=N0+N1If, N>Nmax, then N=Nmax；
E. compressor operating time reaches t2Afterwards, IPM temperature is detected, it is as follows according to IPM temperature control rotation speed of fan：
If IPM temperature<T20, DC fan rotating speed N=N-N2If, N<Nmin, then N=Nmin；If IPM temperature>T21,
DC fan rotating speed N=N+N2If, N>Nmax, then N=Nmax；
F. compressor operating time t3Afterwards, delivery temperature is detected, controls rotation speed of fan as follows according to delivery temperature：
If delivery temperature<T30, DC fan rotating speed N=N-N3If, N<Nmin, then N=Nmin；If delivery temperature>
T31, DC fan rotating speed N=N+N3If, N>Nmax, then N=Nmax；
G. adjustment of rotational speed amount N is calculatedadj=N-N0；
H. compressor operating time t4Afterwards, according to current compression unit frequency and outdoor environment temperature, acquisition direct current wind of tabling look-up
Machine rotating speed N ', it is N=N '+N to determine newest DC fan rotating speedadj；
I. run with the newest DC fan rotating speed after certain time, direct current wind is used as using the newest DC fan rotating speed
The initial speed N of machine0, during compressor is continuously run, repeat step d-h；
J. after compressor shutdown, whether detection external disk temperature, IPM temperature are all allowing in the range of fan parking, if it is,
Then fan parking, otherwise, the operating rotating speed of blower fan is determined according to external disk temperature, IPM temperature, until temperature is reduced to permission blower fan
In the range of shutdown, then DC fan is closed；
K. after compressor restarting, repeat step c-j.
Optimize as further, in step a, according to the specifications and system requirements of DC fan, determine DC fan
Minimum speed NminWith maximum speed Nmax
Optimize as further, in step b, setting up DC fan rotating speed and outdoor environment temperature and compressor frequency pair
When answering table, low-limit frequency and highest frequency is allowed to be divided into multiple intervals according to compressor compressor frequency, by outdoor environment temperature
Degree is divided into multiple intervals according to operating mode, so that by testing the compressor frequency and rotation speed of fan set up in the case where different temperatures is interval
Corresponding table.
It is used as further optimization, the T10、T11、T20、T21、T30、T31Obtained by testing, and T11>T10, T21>T20,
T31>T30。
As further optimization, step j is specifically included：
After compressor shutdown, if detecting external disk temperature ＞ T4, IPM temperature ＞ T5, then rotation speed of fan N=N is controlledmax；
If detecting external disk temperature ＞ T4, IPM temperature≤T5, then rotation speed of fan N=N is controlled4；
If detecting external disk temperature≤T4, IPM temperature ＞ T5 then control rotation speed of fan N=N5；
If detecting external disk temperature≤T4, IPM temperature≤T5 then closes DC fan；
Wherein, T4, T5 are obtained by testing, tachometer value N5＞ N4。
The beneficial effects of the invention are as follows：
The initial speed of DC fan is determined according to compressor frequency and outdoor environment temperature, in compressor operation process
In, according to current system parameters such as outdoor coil temperature, IPM temperature, delivery temperature, environment temperatures, DC fan is adjusted in real time
Rotating speed, realize the stepless time adjustment function of rotation speed of fan.Increase the rotating speed of DC fan under the higher operating mode of various temperature,
Lifting system exchange capability of heat；Under the relatively low operating mode of various temperature, the rotating speed of DC fan is reduced, DC fan consumption is reduced
Power, improves system energy efficiency.So in compressor of air conditioner running, dynamic of the DC fan rotating speed with system condition is realized
Adjustment, has reached the Optimum Matching of DC fan and system.After compressor shutdown, detection outdoor coil temperature, IPM temperature,
Determine whether blower fan operates according to temperatures above, the duration of runs of blower fan operating rotating speed and blower fan, than being compressed in former control program
Machine is shut down, and blower fan is just shut down, and can quickly reduce the temperature of corresponding system, is conducive to reduction compressor caused by system overheat to stop
The system recovery time of machine, shortens the time interval that compressor is again started up.
Brief description of the drawings
Fig. 1 is outdoor environment temperature, compressor frequency and DC fan rotating speed mapping table in embodiment；
Fig. 2 be embodiment in compressor operating when DC fan adjustment of rotational speed flow chart；
DC fan rotating speed logic chart when Fig. 3 is compressor shutdown.
Embodiment
The present invention is directed to propose DC fan control method outside a kind of convertible frequency air-conditioner room, solves convertible frequency air-conditioner in conventional art
Outdoor DC fan rotating speed can not can not Optimum Matching, influence system capability and the problem of reliability with system.
The present invention core concept be：During compressor operation, DC fan realize according to the rotating speed of compressor and
Other key system perameters determine the rotating speed of blower fan, and DC fan rotating speed no longer stepping position only limits the minimum wind of DC fan
Speed and highest wind velocity, stepless time adjustment is realized minimum between highest wind velocity.During compressor operation, in detection compressor
While frequency, outdoor environment temperature is also detected, outdoor coil temperature, IPM temperature, delivery temperature equitemperature are warm more than
During degree change, the rotating speed of DC fan is adjusted in real time, and DC fan consumption is reduced while the exchange capability of heat for the system that meets
Power, improves system energy efficiency.After compressor shutdown, according to systematic parameter when shutting down, confirmation is to maintain DC fan and continues to transport
Turn still to shut down, and the rotating speed operated and time.
In implementing for the present invention, first according to the specifications and system requirements of DC fan, DC fan is determined
Minimum speed NminWith maximum speed Nmax.Then the DC fan rotating speed and outdoor environment temperature and compression shown in Fig. 1 are set up
Unit frequency corresponding table, wherein compressor frequency allow low-limit frequency and highest frequency to be divided into multiple intervals according to compressor, outdoor
Environment temperature is divided into multiple intervals according to operating mode, so that by testing the compressor frequency and wind set up in the case where different temperatures is interval
Machine rotating speed corresponding table.
Running rotation speed of fan adjustment flow chart according to Fig. 2, after air-conditioning start, is operated according to actual compressor
Frequency and outdoor environment temperature, table look-up and obtain the initial speed N of DC fan0.Then t is reached in compressor operating time1Afterwards,
External disk temperature is detected, if external disk temperature is less than the external disk temperature of setting, DC fan rotating speed is reduced, if external disk temperature is high
In the external disk temperature of setting, then increase DC fan rotating speed.
In addition it is also necessary to which the boundary to rotation speed of fan carries out judgement processing, i.e., when rotation speed of fan is limited more than maximum (top) speed
When, operated, if rotation speed of fan is less than minimum speed restriction, operated with minimum speed with maximum (top) speed.
Next step, t is reached in compressor operating time2Afterwards, IPM temperature is detected.If IPM temperature is less than the IPM of setting
Temperature, then reduce DC fan rotating speed, if IPM temperature is higher than the IPM temperature of setting, increases DC fan rotating speed.Now
Boundary to rotation speed of fan carries out judgement processing.
Next step, t is reached in compressor operating time3Afterwards, delivery temperature is detected.If delivery temperature is less than the row of setting
Temperature degree, then reduce DC fan rotating speed, if delivery temperature is higher than the delivery temperature of setting, increases DC fan rotating speed.
Now judgement processing is carried out to the boundary of rotation speed of fan.
Next step, calculates adjustment amount N of the DC fan rotating speed relative to initial rotation speed of fanadj。
Next step, t is reached in compressor operating time4Afterwards, according to current compression unit frequency and outdoor environment temperature, table look-up
DC fan rotating speed N ' is obtained, it is N=N '+N to determine newest DC fan rotating speedadj；
Next step, after the newest DC fan rotating speed operation certain time, using the newest DC fan rotating speed as
The initial speed N of DC fan0, during compressor is continuously run, repeat the above steps, to reach DC fan rotating speed with being
The best match for parameter of uniting.
Shutdown procedure flow chart according to Fig. 3, after compressor shutdown, external disk temperature, IPM temperature when detection is shut down
Whether degree, detection temperatures above is all allowing in the range of fan parking, if it is, fan parking, if not, according to external disk temperature
Degree, IPM temperature determine the operating rotating speed of blower fan, when temperature, which is reduced to DC fan, to be allowed in the range of shutdown, then close direct current
Blower fan.
Embodiment：
By taking certain convertible frequency air-conditioner as an example, the minimum speed 500rpm of DC fan, maximum speed is 1300rpm.
By taking refrigeration as an example, outdoor environment temperature during start<=35 degree, compressor original frequency is 50Hz, inquires about compressor
Rotating speed corresponding with DC fan is 800rpm.DC fan was worked with 800rpm initial speed, when compressor operation 3 minutes
Afterwards, detect outdoor coil temperature, when it is outdoor coil pipe used exceed 50 degree when, DC fan rotating speed increases on the basis of current rotating speed
50rpm；When it is outdoor coil pipe used be less than 40 degree when, DC fan rotating speed reduces 50rpm on the basis of current rotating speed.Continue recording compressed
The duration of runs of machine, after compressor operates 5 minutes again, IPM temperature is detected, when IPM temperature exceeds 75 temperature, direct current wind
Machine rotating speed increases 80rpm on the basis of current rotating speed；When IPM temperature is less than 50 temperature, DC fan rotating speed is in current rotating speed
On the basis of reduce 80rpm.Continue the duration of runs of recording compressed machine, after compressor operates 5 minutes again, detection compressor row
Temperature degree, when compressor exhaust temperature is more than 95 degree, DC fan rotating speed increases 50rpm on the basis of current rotating speed；Work as pressure
When contracting machine delivery temperature is less than 70 degree, DC fan rotating speed reduces 50rpm on the basis of current rotating speed.Calculate the rotating speed after adjustment
Relative to initial speed adjustment amount, continue the recording compressed machine duration of runs, when compressor operates 5 minutes according to current compression again
Unit frequency and outdoor environment temperature obtain rotation speed of fan by Fig. 1, and the rotating speed does new initial of blower fan plus initial speed adjustment amount
Rotating speed.
In above-mentioned each adjustment rotation speed of fan, if increase rotation speed of fan need to be judged after DC fan increase rotating speed, if
Beyond the maximum speed of DC fan, if beyond maximum speed, just operated with maximum speed；If reduction rotation speed of fan need to be sentenced
Whether the DC fan rotating speed after disconnected reduction is less than the minimum speed of DC fan, when the minimum speed less than DC fan,
Operated with the minimum speed of DC fan.
After compressor shutdown, now coil temperature and IPM temperature at sensing chamber, if outdoor coil temperature is more than 60 degree simultaneously
And IPM temperature is more than 90 degree, outdoor DC fan is operated with maximum speed 1300rpm, is extremely not more than 50 to outdoor coil temperature
Degree or IPM temperature are not more than 70 degree；If outdoor coil temperature is more than 50 degree, DC fan is operated with 500rpm；If IPM temperature
Degree is more than 80 degree, and DC fan is operated with 800rpm；If direct current outdoor coil temperature is not more than 40 degree and IPM temperature is little
DC fan is closed in 70 degree.
Claims (5)
1. DC fan control method outside a kind of convertible frequency air-conditioner room, it is characterised in that including：
A. the minimum speed N of DC fan outside convertible frequency air-conditioner room is determinedminWith maximum speed Nmax；
B. DC fan rotating speed and outdoor environment temperature and compressor frequency corresponding table are set up；
C. after air-conditioning start, according to compressor operation frequency and outdoor environment temperature, table look-up and obtain the initial speed of DC fan
N0；
D. compressor operating time reaches t1Afterwards, external disk temperature is detected, controls rotation speed of fan as follows according to external disk temperature：
If external disk temperature<T10, then DC fan rotating speed N=N0-N1If, N<Nmin, then N=Nmin；If external disk temperature>
T11, DC fan rotating speed N=N0+N1If, N>Nmax, then N=Nmax；
E. compressor operating time reaches t2Afterwards, IPM temperature is detected, it is as follows according to IPM temperature control rotation speed of fan：
If IPM temperature<T20, DC fan rotating speed N=N-N2If, N<Nmin, then N=Nmin；If IPM temperature>T21, direct current
Rotation speed of fan N=N+N2If, N>Nmax, then N=Nmax；
F. compressor operating time t3Afterwards, delivery temperature is detected, controls rotation speed of fan as follows according to delivery temperature：
If delivery temperature<T30, DC fan rotating speed N=N-N3If, N<Nmin, then N=Nmin；If delivery temperature>T31, directly
Flow fan rotating speed N=N+N3If, N>Nmax, then N=Nmax；
G. adjustment of rotational speed amount N is calculatedadj=N-N0；
H. compressor operating time t4Afterwards, according to current compression unit frequency and outdoor environment temperature, acquisition DC fan rotating speed of tabling look-up
N ', it is N=N '+N to determine newest DC fan rotating speedadj；
I. run with the newest DC fan rotating speed after certain time, DC fan is used as using the newest DC fan rotating speed
Initial speed N0, during compressor is continuously run, repeat step d-h；
J. after compressor shutdown, whether detection external disk temperature, IPM temperature are all allowing in the range of fan parking, if it is, wind
Machine is shut down, and otherwise, the operating rotating speed of blower fan is determined according to external disk temperature, IPM temperature, until temperature is reduced to permission fan parking
In the range of, then close DC fan；
K. after compressor restarting, repeat step c-j.
2. DC fan control method outside a kind of convertible frequency air-conditioner room as claimed in claim 1, it is characterised in that in step a, root
According to the specifications and system requirements of DC fan, the minimum speed N of DC fan is determinedminWith maximum speed Nmax。
3. DC fan control method outside a kind of convertible frequency air-conditioner room as claimed in claim 1, it is characterised in that in step b,
When setting up DC fan rotating speed with outdoor environment temperature and compressor frequency corresponding table, compressor frequency is allowed according to compressor
Low-limit frequency and highest frequency are divided into multiple intervals, outdoor environment temperature are divided into multiple intervals according to operating mode, so as to pass through reality
Test the compressor frequency set up in the case where different temperatures is interval and rotation speed of fan corresponding table.
4. DC fan control method outside a kind of convertible frequency air-conditioner room as claimed in claim 1, it is characterised in that the T10、T11、
T20、T21、T30、T31Obtained by testing, and T11>T10, T21>T20, T31>T30。
5. DC fan control method outside a kind of convertible frequency air-conditioner room as claimed in claim 1, it is characterised in that step j is specific
Including：
After compressor shutdown, if detecting external disk temperature ＞ T4, IPM temperature ＞ T5, then rotation speed of fan N=N is controlledmax；
If detecting external disk temperature ＞ T4, IPM temperature≤T5, then rotation speed of fan N=N is controlled4；
If detecting external disk temperature≤T4, IPM temperature ＞ T5 then control rotation speed of fan N=N5；
If detecting external disk temperature≤T4, IPM temperature≤T5 then closes DC fan；
Wherein, T4, T5 are obtained by testing, tachometer value N5＞ N4。
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| CN201710343438.3A CN107166642B (en) | 2017-05-16 | 2017-05-16 | DC fan control method outside a kind of convertible frequency air-conditioner room |
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| CN107166642A true CN107166642A (en) | 2017-09-15 |
| CN107166642B CN107166642B (en) | 2019-10-01 |
Family
ID=59815176
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| CN107883522A (en) * | 2017-11-10 | 2018-04-06 | 广东志高暖通设备股份有限公司 | The control method and device of outdoor fan in a kind of frequency conversion heat pump air-conditioning |
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