CN102345915A - Fault operation control method of DC (direct current) convertible frequency air conditioner - Google Patents
Fault operation control method of DC (direct current) convertible frequency air conditioner Download PDFInfo
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Abstract
The invention discloses a fault operation control method of a DC (direct current) convertible frequency air conditioner, which comprises the following concrete steps of: (1) carrying out classification on a fault and protection of the existing DC convertible frequency air conditioner; and (2) judging whether an air conditioning unit has the fault or not, i.e. starting and operating the air conditioning unit, carrying out fault judgment in the operating process, continuously operating the air conditioning unit if the air conditioning unit has no fault, and carrying out shutdown or entering a corresponding fault operation mode according to the grade of the fault if the air conditioning unit has the fault. In the control method, the air conditioning unit operates with the fault on the premise of no malignant fault and the fault problem is solved after work.
Description
Technical field
The present invention relates to the DC frequency converting air-conditioner technical field, specifically is a kind of failure operation control method of DC frequency converting air-conditioner.
Background technology
The DC frequency converting air-conditioner system is in order to guarantee the normal and operation reliably of air-conditioning unit; Particularly air-conditioning system is effectively protected; In the control software of air-conditioning unit, increase many safeguard measures; As: the excessive discharge temperature protection; Suction temperature is crossed low protection; High voltage protective; Low-voltage variation; Overcurrent protection; Overvoltage/under-voltage protection; Module protection; The anti-freeze protection; Outdoor coil pipe used temperature protection; The outdoor environment temperature protection; The indoor coil pipe protection; The indoor environment temperature protection; The press machine starts the failure protection; The driver module abnormal protection; The protection of PFC operation irregularity; The indoor fan abnormal protection; The outdoor fan abnormal protection, or the like.For DC frequency converting air-conditioner, round-the-clock running throughout the year, the outdoor working condition of operation changes widely different, changes also relatively sharply.Adding that wearing out appears in the hardware of air-conditioning system, particularly electric components, perhaps functional inefficacy appears in other reason.Therefore, to break down be inevitable thing to air-conditioning system.
At present, in order to protect the air-conditioning unit reliability, protectiveness occurs because of the protection factor through regular meeting and shut down, particularly just needing during the working of air-conditioning effect, air-conditioning is shut down the working environment that must influence the working period.
Summary of the invention
The technical problem that the present invention will solve is, provides a kind of and do not occur operating with failure under the pernicious fault prerequisite at the air-conditioning unit, until the failure operation control method of the DC frequency converting air-conditioner of handling failure problem more After Hours.
Technical scheme of the present invention is, a kind of failure operation control method with DC frequency converting air-conditioner of following steps is provided, and comprises following concrete steps:
(1), classification is carried out in fault and the protection that existing DC frequency converting air-conditioner is occurred;
(2), judge whether the air-conditioning unit has fault:
The operation of air-conditioning unit starting, carry out fault judgement in the running: if fault-free, then unit continues operation; If the air-conditioning unit breaks down, then shut down or get into the pattern that operates with failure accordingly according to the fault rank.
After adopting above structure; The present invention compared with prior art; Have the following advantages: the fault through DC frequency converting air-conditioner is classified; Being the air-conditioning unit operates with failure under pernicious fault (like compressor, control panel, condenser, evaporimeter and the throttle part etc.) prerequisite not occurring; Until handling failure problem more After Hours; Ensure normal air-conditioning effect during the working like this, avoid influencing the working environment of working period.
The specific embodiment
Failure operation control method in the face of DC frequency converting air-conditioner of the present invention is described further down.
The failure operation control method of DC frequency converting air-conditioner of the present invention comprises following concrete steps:
(1), classification is carried out in fault and the protection that existing DC frequency converting air-conditioner is occurred;
(2), judge whether the air-conditioning unit has fault:
The operation of air-conditioning unit starting, carry out fault judgement in the running: if fault-free, then the air-conditioning unit continues operation; If the air-conditioning unit breaks down, then shut down or get into the pattern that operates with failure accordingly according to the fault rank.
2, the failure operation control method of DC frequency converting air-conditioner according to claim 1 is characterized in that: classification is carried out in fault and protection to existing DC frequency converting air-conditioner occurs, is set at 1 grade to 24 grades, and totally 24 rank faults are distinguished as follows:
1 grade of fault: driven compressor module fault;
2 grades of faults: the unusual or startup failure of compressor operating;
3 grades of faults: outside control panel and press driver module communication failure;
4 grades of faults: outdoor fan fault;
5 grades of faults: outside control panel and indoor control panel communication failure;
6 grades of faults: driven compressor module fault;
7 grades of faults: the unusual or startup failure of compressor operating;
8 grades of faults: indoor set anti-freeze;
9 grades of faults: excessive discharge temperature;
10 grades of faults: press overheating fault;
11 grades of faults: outdoor EEPROM fault;
12 grades of faults: outdoor input current sensor fault;
13 grades of faults: outdoor input ac voltage sensor fault;
14 grades of faults: input side overcurrent protection;
15 grades of faults: input side interchange overvoltage/under-voltage;
16 grades of faults: exhaust gas temperature sensor short circuit/open circuit fault;
17 grades of faults: outdoor environment temperature sensor short circuit/open circuit fault;
18 grades of faults: outdoor coil pipe used temperature sensor short circuit/open circuit fault;
19 grades of faults: outer coil pipe overtemperature;
20 grades of faults: suction temperature sensor fault;
21 grades of faults: suction temperature is crossed low fault;
22 grades of faults: indoor environment temperature sensor fault;
23 grades of faults: indoor coil pipe sensor fault;
24 grades of faults: indoor coil overtemperature.
3, the failure operation control method of DC frequency converting air-conditioner according to claim 2 is characterized in that: the shutdown described in the step (two) is meant, whether such fault the main core component of grievous injury, and perhaps such fault causes the air-conditioning unit to move; And if the fault rank is in 1 grade to the 7 grades fault one of them, hard stop then, and show failure code.
4, the failure operation control method of DC frequency converting air-conditioner according to claim 2 is characterized in that: the entering described in the step (two) pattern of operating with failure accordingly is meant, gets into corresponding failure operation pattern according to different fault ranks:
Step (1): if 8 grades of faults, i.e. indoor set anti-freeze,
Indoor coil pipe is carried out subregion: the a-quadrant: indoor coil pipe＜-5 ℃;
B zone :-5 ℃≤indoor coil pipe＜4 ℃;
C zone: 4 ℃≤indoor coil pipe≤5 ℃;
D zone: indoor coil pipe is in rising edge, and indoor coil pipe >=8 ℃;
The a-quadrant: when indoor coil pipe＜-5 ℃, and during lasting 30s, carry out the anti-freeze stoppage protection, at this moment, and compressor shutdown, outdoor fan stops, and indoor fan is running as usual;
D zone: after the anti-freeze protection is shut down, and when indoor coil pipe rise to >=8 ℃ the time, compressor releasing anti-freeze frequency limitation;
B zone: when indoor coil pipe＜4 ℃, carry out antifreeze frequency reducing, frequency reducing speed 8Hz/30s; If still be in the B district in the frequency reducing process, then continue frequency reducing, up to minimum running frequency 30Hz; Anti-freeze frequency reducing condition subsequent: indoor coil pipe is raised to >=8 ℃ after, remove the anti-freeze frequency reducing;
C zone: anti-freeze is forbidden the raising frequency state, and compressor maintains current frequency, but frequency reducing, but can not raising frequency;
Anti-freeze is forbidden the raising frequency condition subsequent: behind indoor coil pipe >=8 ℃, remove anti-freeze and forbid the raising frequency state;
Step (2): if 9 grades of faults, i.e. excessive discharge temperature,
Invariable frequency compressor: when invariable frequency compressor delivery temperature>=105 ℃, continue 10s, stop invariable frequency compressor; In the 3min standby, and during invariable frequency compressor delivery temperature≤90 ℃, invariable frequency compressor restarts; Continuous 3 excessive discharge temperature protection in the 60min, then stopping alarm, and the start that need manually power on again;
Frequency-changeable compressor:
When frequency-changeable compressor delivery temperature＞90 ℃, raising frequency at a slow speed, raising frequency speed 1Hz/10s;
When frequency-changeable compressor delivery temperature＞95 ℃, keep current running frequency;
When frequency-changeable compressor delivery temperature＞98 ℃, frequency reducing at a slow speed, frequency reducing speed 1Hz/10s;
When frequency-changeable compressor delivery temperature＞100 ℃, frequency reducing fast, frequency reducing speed 1Hz/s;
When frequency-changeable compressor delivery temperature＞102 ℃, frequency reducing fast, frequency reducing speed 2Hz/s;
When frequency-changeable compressor delivery temperature >=105 ℃, continue 10s, shut down; After the 3min standby, restart continuous 3 excessive discharge temperature protection in the 60min, then stopping alarm, and the start that need manually power on again;
Step (3): if 10 grades of faults, i.e. press overheating fault,
When compressor case temperature switch＞130 ℃ are broken off, hard stop, and show malfunction;
When compressor case temperature switch＜100 ℃, recover, compressor is opened after the 3min standby again;
Step (4): if 11 grades of faults, promptly outdoor EEPROM fault,
Take to be provided with two kinds of EEPROM, a kind of is the EEPROM that is built in the chip program, and the setting of air-conditioning unit operational factor is the value of confirming through the debugging back, and as default parameters; Another kind is external EEPROM;
Read external EEPROM when the air-conditioning unit powers on start, if read continuous 3 failures of external EEPROM, then change over to and read built-in EEPROM, the air-conditioning unit operates with failure according to the default parameters among the built-in EEPROM, and shows failure code;
Step (5): if 12 grades of faults, promptly outdoor input current sensor fault, then DC frequency-changeable compressor is limited to rated frequency 60Hz continuation operation down;
Step (6): if 13 grades of faults, promptly outdoor input ac voltage sensor fault, then DC frequency-changeable compressor is limited to rated frequency 60Hz continuation operation down;
Step (7): if 14 grades of faults, i.e. input side overcurrent protection, then DC frequency-changeable compressor is limited to rated frequency 60Hz and continues operation down;
Step (8): if 15 grades of faults, i.e. input side interchange overvoltage/under-voltage, then DC frequency-changeable compressor is limited to rated frequency 60Hz continuation operation down;
Step (9): if 16 grades of faults, i.e. exhaust gas temperature sensor short circuit/open circuit fault,
If when 10 grades of faults not occurring, DC frequency-changeable compressor begins frequency reducing operation, frequency reducing speed 5Hz/5min;
When if 10 grades of faults occurring, DC frequency-changeable compressor begins the frequency reducing operation, and frequency reducing speed is brought up to 5Hz/2min;
When the DC frequency-changeable compressor running frequency was reduced to the minimum operation frequency, 5min detected 16 grades of faults continuously; If 16 grades of faults exist always, and 10 grades of faults also exist then shutdown, start again behind the 10min, operation under minimum operation frequency 30Hz always;
Step (10): if 17 grades of faults, i.e. outdoor environment temperature sensor short circuit/open circuit fault,
The control relevant with outdoor environment temperature is controlled according to the failure operation pattern:
A. the value of the limit value A during indoor unit capability demand percentage calculates is 100%;
When B. heating mode moved, the target degree of superheat value that heats main electric expansion valve was 2 ℃;
When C. refrigeration mode moved, subcooler electronic expansion valve controls pattern was controlled according to the delivery temperature control mode;
When D. refrigeration mode moved, the control of outdoor fan motor was controlled according to outdoor coil pipe used temperature, and is not judged outdoor environment temperature;
When E. heating mode moved, the control of outdoor fan motor was controlled according to the defrosting temperature, and is not judged outdoor environment temperature;
When F. refrigeration mode moves, 0 ℃ of indoor target evaporating temperature stuck-at-;
Step (11): if 18 grades of faults--outdoor coil pipe used temperature sensor short circuit/open circuit fault,
A. heat the start cross valve and ensure that the successful decision condition of cross valve commutation is adjusted into the condition under the malfunction in the running; That is: cross valve powers on the back if Compressor Inlet Temperature deducts outdoor environment temperature less than 6 ℃; And the compressor exhaust temperature that starts is all greater than 30 ℃; And lasting 3s, think that then the cross valve commutation puts in place;
B. during the refrigerating operaton pattern, the control mode when the cold control mode of the mistake of subcooler electronic expansion valve opening is adjusted into fault mode, that is:
When the mean temperature of subcooler outlet temperature＜indoor coil middle part, electronic expansion valve opening variable quantity=2 * (subcooler outlet temperature-indoor coil middle part mean temperature);
When subcooler outlet temperature >=indoor coil middle part mean temperature, electronic expansion valve opening variable quantity=subcooler outlet temperature-indoor coil middle part mean temperature;
When C. refrigeration mode moved, the outdoor fan rotating speed of motor was forced according to 5 grades of operations;
D. in refrigeration mode when operation, is when the frequency-changeable compressor running frequency is lower than specified running frequency 60Hz, by current running frequency operation; When the frequency-changeable compressor running frequency was higher than 60Hz, then running frequency was reduced to 60Hz;
Step (12): if 19 grades of faults, outer coil pipe overtemperature,
During heating mode, this protection is invalid, and only when refrigeration mode moved, this outer coil pipe high temperature protection was just effective;
When outdoor coil pipe used temperature＞56 ℃, the DC frequency-changeable compressor raising frequency, raising frequency speed is 1Hz/10s;
When outdoor coil pipe used temperature＞58 ℃, DC frequency-changeable compressor keeps current frequency operation;
When outdoor coil pipe used temperature＞59 ℃, the DC frequency-changeable compressor frequency reducing, frequency reducing speed is 1Hz/10s;
When outdoor coil pipe used temperature＞62 ℃, the DC frequency-changeable compressor frequency reducing, frequency reducing speed is 1Hz/s;
When outdoor coil pipe used temperature＞63 ℃, the DC frequency-changeable compressor frequency reducing, frequency reducing speed is 2Hz/s;
When outdoor coil pipe used temperature＞65 ℃, when continuing 10s, the air-conditioning unit is directly shut down, after the standby in 3 minutes, restart, and continuous 3 outer coil pipe high temperature protections in 60 minutes, then stopping alarm can be cancelled after re-powering;
Step (13): if 20 grades of faults, i.e. suction temperature sensor fault,
A. heat the decision condition shielding Rule of judgment relevant that the start cross valve ensures that the cross valve commutation is successful in the running with suction temperature; That is: after cross valve powers on; If outdoor coil pipe used temperature deducts outdoor environment temperature and is lower than 0 ℃; And the delivery temperature of the compressor that starts is all greater than 30 ℃; And lasting 3s, think that then the cross valve commutation puts in place;
When B. heating mode moved, the control that heats main electronic expansion valve opening was controlled according to indoor unit capability demand percentage:
When indoor unit capability demand percentage＜50%, heat main electronic expansion valve opening=150～200 steps;
When indoor unit capability demand percentage＜75%, heat main electronic expansion valve opening=200～250 steps;
When indoor unit capability demand percentage >=75%, heat main electronic expansion valve opening=250～350 steps;
Step (14): if 21 grades of faults, promptly suction temperature is crossed low fault: in the how online normal course of operation of DC frequency-changing, if suction temperature is low excessively, then protect as follows:
When suction temperature＜4 ℃, DC frequency-changeable compressor raising frequency, raising frequency speed 1Hz/10s;
When suction temperature＜3 ℃, DC frequency-changeable compressor keeps current running frequency;
When suction temperature＜2 ℃, DC frequency-changeable compressor frequency reducing, frequency reducing speed 1Hz/10s;
When suction temperature＜0 ℃, DC frequency-changeable compressor frequency reducing, frequency reducing speed 1Hz/s;
When suction temperature＜-3 ℃, the DC frequency-changeable compressor frequency reducing, frequency reducing speed 2Hz/s, and open the unloading magnetic valve between the high and low pressure side, to improve the low-pressure side temperature;
When suction temperature >=4 ℃, the DC frequency-changeable compressor running frequency is recovered normal regulating;
Step (15): if 22 grades of faults, the indoor environment temperature sensor fault
The indoor unit capability demand is calculated the following mode that adopts: in the preceding 40min after the start of air-conditioning unit, the indoor unit capability demand is calculated by 130%; In the 20min afterwards, the indoor unit capability demand is calculated by 100%; After this, in each computing cycle, reduce the indoor unit capability demand, until reducing to 50%, and be maintained to come off duty and shut down maintenance by the speed of 10%/20min;
Step (16): if 23 grades of faults, the indoor coil pipe sensor fault,
During the refrigeration mode operation, the indoor coil pipe sensor fault does not influence the air-conditioning unit operation;
During the heating mode operation, the electronic expansion valve opening of start indoor set was fixed on for 350～450 steps;
During the heating mode operation, the air-conditioning unit is opened in the preceding 60min of operation, regulates the start and stop control of DC frequency-changeable compressor running frequency and invariable frequency compressor according to normal adjusting pattern;
During the heating mode operation, behind the air-conditioning unit start operation 60min, if running frequency is higher than 60Hz, running frequency reduces, and frequency reducing speed is 10Hz/20min, reduces to 60Hz up to running frequency, and keeps operation; When running frequency is lower than 60Hz, by current frequency operation;
Step (17): if 24 grades of faults, the indoor coil overtemperature,
This protection is effective when air-conditioning unit heating operation,
Detect indoor coil pipe behind the compressor operation; When indoor coil pipe >=60 ℃, and continue 5 seconds, then indoor set sends on the indoor unit capability demand percentage to off-premises station and is limited to 30%; Until indoor coil pipe＜56 ℃, and continue undoability demand percentage restriction after 3 seconds;
When indoor coil pipe >=65 ℃; And continuous 10 seconds; Then indoor set is 12% to off-premises station transmission indoor set transmitting capacity demand percentage; Indoor fan and electric expansion valve are by moving to warm shutdown mode; Until indoor coil pipe＜52 ℃; And continue 3 seconds, return to normal control, indoor fan and electronic expansion valve controls return to the state before the inlet chamber inner coil pipe high temperature protection.
Claims (4)
1. the failure operation control method of a DC frequency converting air-conditioner is characterized in that: comprise following concrete steps:
(1), classification is carried out in fault and the protection that existing DC frequency converting air-conditioner is occurred;
(2), judge whether the air-conditioning unit has fault:
The operation of air-conditioning unit starting, carry out fault judgement in the running: if fault-free, then the air-conditioning unit continues operation; If the air-conditioning unit breaks down, then shut down or get into the pattern that operates with failure accordingly according to the fault rank.
2. the failure operation control method of DC frequency converting air-conditioner according to claim 1 is characterized in that: classification is carried out in fault and protection to existing DC frequency converting air-conditioner occurs, is set at 1 grade to 24 grades, and totally 24 rank faults are distinguished as follows:
1 grade of fault: driven compressor module fault;
2 grades of faults: the unusual or startup failure of compressor operating;
3 grades of faults: outside control panel and press driver module communication failure;
4 grades of faults: outdoor fan fault;
5 grades of faults: outside control panel and indoor control panel communication failure;
6 grades of faults: driven compressor module fault;
7 grades of faults: the unusual or startup failure of compressor operating;
8 grades of faults: indoor set anti-freeze;
9 grades of faults: excessive discharge temperature;
10 grades of faults: press overheating fault;
11 grades of faults: outdoor EEPROM fault;
12 grades of faults: outdoor input current sensor fault;
13 grades of faults: outdoor input ac voltage sensor fault;
14 grades of faults: input side overcurrent protection;
15 grades of faults: input side interchange overvoltage/under-voltage;
16 grades of faults: exhaust gas temperature sensor short circuit/open circuit fault;
17 grades of faults: outdoor environment temperature sensor short circuit/open circuit fault;
18 grades of faults: outdoor coil pipe used temperature sensor short circuit/open circuit fault;
19 grades of faults: outer coil pipe overtemperature;
20 grades of faults: suction temperature sensor fault;
21 grades of faults: suction temperature is crossed low fault;
22 grades of faults: indoor environment temperature sensor fault;
23 grades of faults: indoor coil pipe sensor fault;
24 grades of faults: indoor coil overtemperature.
3. the failure operation control method of DC frequency converting air-conditioner according to claim 2 is characterized in that: the shutdown described in the step (two) is meant, whether such fault the main core component of grievous injury, and perhaps such fault causes the air-conditioning unit to move; And if the fault rank is in 1 grade to the 7 grades fault one of them, hard stop then, and show failure code.
4. the failure operation control method of DC frequency converting air-conditioner according to claim 2, it is characterized in that: the entering described in the step (two) pattern of operating with failure accordingly is meant, gets into corresponding failure operation pattern according to different fault ranks:
Step (1): if 8 grades of faults, i.e. indoor set anti-freeze,
Indoor coil pipe is carried out subregion: the a-quadrant: indoor coil pipe＜-5 ℃;
B zone :-5 ℃≤indoor coil pipe＜4 ℃;
C zone: 4 ℃≤indoor coil pipe≤5 ℃;
D zone: indoor coil pipe is in rising edge, and indoor coil pipe >=8 ℃;
The a-quadrant: when indoor coil pipe＜-5 ℃, and during lasting 30s, carry out the anti-freeze stoppage protection, at this moment, and compressor shutdown, outdoor fan stops, and indoor fan is running as usual;
D zone: after the anti-freeze protection is shut down, and when indoor coil pipe rise to >=8 ℃ the time, compressor releasing anti-freeze frequency limitation;
B zone: when indoor coil pipe＜4 ℃, carry out antifreeze frequency reducing, frequency reducing speed 8Hz/30s; If still be in the B district in the frequency reducing process, then continue frequency reducing, up to minimum running frequency 30Hz; Anti-freeze frequency reducing condition subsequent: indoor coil pipe is raised to >=8 ℃ after, remove the anti-freeze frequency reducing;
C zone: anti-freeze is forbidden the raising frequency state, and compressor maintains current frequency, but frequency reducing, but can not raising frequency;
Anti-freeze is forbidden the raising frequency condition subsequent: behind indoor coil pipe >=8 ℃, remove anti-freeze and forbid the raising frequency state;
Step (2): if 9 grades of faults, i.e. excessive discharge temperature,
Invariable frequency compressor: when invariable frequency compressor delivery temperature>=105 ℃, continue 10s, stop invariable frequency compressor; In the 3min standby, and during invariable frequency compressor delivery temperature≤90 ℃, invariable frequency compressor restarts; Continuous 3 excessive discharge temperature protection in the 60min, then stopping alarm, and the start that need manually power on again;
Frequency-changeable compressor:
When frequency-changeable compressor delivery temperature＞90 ℃, raising frequency at a slow speed, raising frequency speed 1Hz/10s;
When frequency-changeable compressor delivery temperature＞95 ℃, keep current running frequency;
When frequency-changeable compressor delivery temperature＞98 ℃, frequency reducing at a slow speed, frequency reducing speed 1Hz/10s;
When frequency-changeable compressor delivery temperature＞100 ℃, frequency reducing fast, frequency reducing speed 1Hz/s;
When frequency-changeable compressor delivery temperature＞102 ℃, frequency reducing fast, frequency reducing speed 2Hz/s;
When frequency-changeable compressor delivery temperature >=105 ℃, continue 10s, shut down; After the 3min standby, restart continuous 3 excessive discharge temperature protection in the 60min, then stopping alarm, and the start that need manually power on again;
Step (3): if 10 grades of faults, i.e. press overheating fault,
When compressor case temperature switch＞130 ℃ are broken off, hard stop, and show malfunction;
When compressor case temperature switch＜100 ℃, recover, compressor is opened after the 3min standby again;
Step (4): if 11 grades of faults, promptly outdoor EEPROM fault,
Take to be provided with two kinds of EEPROM, a kind of is the EEPROM that is built in the chip program, and the setting of air-conditioning unit operational factor is the value of confirming through the debugging back, and as default parameters; Another kind is external EEPROM;
Read external EEPROM when the air-conditioning unit powers on start, if read continuous 3 failures of external EEPROM, then change over to and read built-in EEPROM, the air-conditioning unit operates with failure according to the default parameters among the built-in EEPROM, and shows failure code; Step (5): if 12 grades of faults, promptly outdoor input current sensor fault, then DC frequency-changeable compressor is limited to rated frequency 60Hz continuation operation down;
Step (6): if 13 grades of faults, promptly outdoor input ac voltage sensor fault, then DC frequency-changeable compressor is limited to rated frequency 60Hz continuation operation down;
Step (7): if 14 grades of faults, i.e. input side overcurrent protection, then DC frequency-changeable compressor is limited to rated frequency 60Hz and continues operation down;
Step (8): if 15 grades of faults, i.e. input side interchange overvoltage/under-voltage, then DC frequency-changeable compressor is limited to rated frequency 60Hz continuation operation down;
Step (9): if 16 grades of faults, i.e. exhaust gas temperature sensor short circuit/open circuit fault,
If when 10 grades of faults not occurring, DC frequency-changeable compressor begins frequency reducing operation, frequency reducing speed 5Hz/5min;
When if 10 grades of faults occurring, DC frequency-changeable compressor begins the frequency reducing operation, and frequency reducing speed is brought up to 5Hz/2min;
When the DC frequency-changeable compressor running frequency was reduced to the minimum operation frequency, 5min detected 16 grades of faults continuously; If 16 grades of faults exist always, and 10 grades of faults also exist then shutdown, start again behind the 10min, operation under minimum operation frequency 30Hz always;
Step (10): if 17 grades of faults, i.e. outdoor environment temperature sensor short circuit/open circuit fault,
The control relevant with outdoor environment temperature is controlled according to the failure operation pattern:
A. the value of the limit value A during indoor unit capability demand percentage calculates is 100%;
When B. heating mode moved, the target degree of superheat value that heats main electric expansion valve was 2 ℃;
When C. refrigeration mode moved, subcooler electronic expansion valve controls pattern was controlled according to the delivery temperature control mode;
When D. refrigeration mode moved, the control of outdoor fan motor was controlled according to outdoor coil pipe used temperature, and is not judged outdoor environment temperature;
When E. heating mode moved, the control of outdoor fan motor was controlled according to the defrosting temperature, and is not judged outdoor environment temperature;
When F. refrigeration mode moves, 0 ℃ of indoor target evaporating temperature stuck-at-;
Step (11): if 18 grades of faults--outdoor coil pipe used temperature sensor short circuit/open circuit fault,
A. heat the start cross valve and ensure that the successful decision condition of cross valve commutation is adjusted into the condition under the malfunction in the running; That is: cross valve powers on the back if Compressor Inlet Temperature deducts outdoor environment temperature less than 6 ℃; And the compressor exhaust temperature that starts is all greater than 30 ℃; And lasting 3s, think that then the cross valve commutation puts in place;
B. during the refrigerating operaton pattern, the control mode when the cold control mode of the mistake of subcooler electronic expansion valve opening is adjusted into fault mode, that is:
When the mean temperature of subcooler outlet temperature＜indoor coil middle part, electronic expansion valve opening variable quantity=2 * (subcooler outlet temperature-indoor coil middle part mean temperature);
When subcooler outlet temperature >=indoor coil middle part mean temperature, electronic expansion valve opening variable quantity=subcooler outlet temperature-indoor coil middle part mean temperature;
When C. refrigeration mode moved, the outdoor fan rotating speed of motor was forced according to 5 grades of operations;
D. in refrigeration mode when operation, is when the frequency-changeable compressor running frequency is lower than specified running frequency 60Hz, by current running frequency operation; When the frequency-changeable compressor running frequency was higher than 60Hz, then running frequency was reduced to 60Hz;
Step (12): if 19 grades of faults, outer coil pipe overtemperature,
During heating mode, this protection is invalid, and only when refrigeration mode moved, this outer coil pipe high temperature protection was just effective;
When outdoor coil pipe used temperature＞56 ℃, the DC frequency-changeable compressor raising frequency, raising frequency speed is 1Hz/10s;
When outdoor coil pipe used temperature＞58 ℃, DC frequency-changeable compressor keeps current frequency operation;
When outdoor coil pipe used temperature＞59 ℃, the DC frequency-changeable compressor frequency reducing, frequency reducing speed is 1Hz/10s;
When outdoor coil pipe used temperature＞62 ℃, the DC frequency-changeable compressor frequency reducing, frequency reducing speed is 1Hz/s;
When outdoor coil pipe used temperature＞63 ℃, the DC frequency-changeable compressor frequency reducing, frequency reducing speed is 2Hz/s;
When outdoor coil pipe used temperature＞65 ℃, when continuing 10s, the air-conditioning unit is directly shut down, after the standby in 3 minutes, restart, and continuous 3 outer coil pipe high temperature protections in 60 minutes, then stopping alarm can be cancelled after re-powering;
Step (13): if 20 grades of faults, i.e. suction temperature sensor fault,
A. heat the decision condition shielding Rule of judgment relevant that the start cross valve ensures that the cross valve commutation is successful in the running with suction temperature; That is: after cross valve powers on; If outdoor coil pipe used temperature deducts outdoor environment temperature and is lower than 0 ℃; And the delivery temperature of the compressor that starts is all greater than 30 ℃; And lasting 3s, think that then the cross valve commutation puts in place;
When B. heating mode moved, the control that heats main electronic expansion valve opening was controlled according to indoor unit capability demand percentage:
When indoor unit capability demand percentage＜50%, heat main electronic expansion valve opening=150～200 steps;
When indoor unit capability demand percentage＜75%, heat main electronic expansion valve opening=200～250 steps;
When indoor unit capability demand percentage >=75%, heat main electronic expansion valve opening=250～350 steps;
Step (14): if 21 grades of faults, promptly suction temperature is crossed low fault: in the how online normal course of operation of DC frequency-changing, if suction temperature is low excessively, then protect as follows:
When suction temperature＜4 ℃, DC frequency-changeable compressor raising frequency, raising frequency speed 1Hz/10s;
When suction temperature＜3 ℃, DC frequency-changeable compressor keeps current running frequency;
When suction temperature＜2 ℃, DC frequency-changeable compressor frequency reducing, frequency reducing speed 1Hz/10s;
When suction temperature＜0 ℃, DC frequency-changeable compressor frequency reducing, frequency reducing speed 1Hz/s;
When suction temperature＜-3 ℃, the DC frequency-changeable compressor frequency reducing, frequency reducing speed 2Hz/s, and open the unloading magnetic valve between the high and low pressure side, to improve the low-pressure side temperature;
When suction temperature >=4 ℃, the DC frequency-changeable compressor running frequency is recovered normal regulating;
Step (15): if 22 grades of faults, the indoor environment temperature sensor fault
The indoor unit capability demand is calculated the following mode that adopts: in the preceding 40min after the start of air-conditioning unit, the indoor unit capability demand is calculated by 130%; In the 20min afterwards, the indoor unit capability demand is calculated by 100%; After this, in each computing cycle, reduce the indoor unit capability demand, until reducing to 50%, and be maintained to come off duty and shut down maintenance by the speed of 10%/20min;
Step (16): if 23 grades of faults, the indoor coil pipe sensor fault,
During the refrigeration mode operation, the indoor coil pipe sensor fault does not influence the air-conditioning unit operation;
During the heating mode operation, the electronic expansion valve opening of start indoor set was fixed on for 350～450 steps;
During the heating mode operation, the air-conditioning unit is opened in the preceding 60min of operation, regulates the start and stop control of DC frequency-changeable compressor running frequency and invariable frequency compressor according to normal adjusting pattern;
During the heating mode operation, behind the air-conditioning unit start operation 60min, if running frequency is higher than 60Hz, running frequency reduces, and frequency reducing speed is 10Hz/20min, reduces to 60Hz up to running frequency, and keeps operation; When running frequency is lower than 60Hz, by current frequency operation;
Step (17): if 24 grades of faults, the indoor coil overtemperature,
This protection is effective when air-conditioning unit heating operation,
Detect indoor coil pipe behind the compressor operation; When indoor coil pipe >=60 ℃, and continue 5 seconds, then indoor set sends on the indoor unit capability demand percentage to off-premises station and is limited to 30%; Until indoor coil pipe＜56 ℃, and continue undoability demand percentage restriction after 3 seconds;
When indoor coil pipe >=65 ℃; And continuous 10 seconds; Then indoor set is 12% to off-premises station transmission indoor set transmitting capacity demand percentage; Indoor fan and electric expansion valve are by moving to warm shutdown mode; Until indoor coil pipe＜52 ℃; And continue 3 seconds, return to normal control, indoor fan and electronic expansion valve controls return to the state before the inlet chamber inner coil pipe high temperature protection.
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| CN2011102191620A CN102345915B (en) | 2011-08-02 | 2011-08-02 | Fault operation control method of DC (direct current) convertible frequency air conditioner |
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| CN2011102191620A CN102345915B (en) | 2011-08-02 | 2011-08-02 | Fault operation control method of DC (direct current) convertible frequency air conditioner |
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Address after: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: Ningbo AUX Electric Co., Ltd. |
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Effective date of registration: 20191217 Address after: 243100 No. 1166, oaks Avenue, Dangtu Economic Development Zone, Ma'anshan City, Anhui Province Patentee after: Anhui Ox Intelligent Electric Co., Ltd. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: NINGBO AUX ELECTRIC CO., LTD. |