CN102967022A - Control method for starting variable-frequency compressor of multi-connected air conditioning unit - Google Patents
Control method for starting variable-frequency compressor of multi-connected air conditioning unit Download PDFInfo
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- CN102967022A CN102967022A CN2012104043863A CN201210404386A CN102967022A CN 102967022 A CN102967022 A CN 102967022A CN 2012104043863 A CN2012104043863 A CN 2012104043863A CN 201210404386 A CN201210404386 A CN 201210404386A CN 102967022 A CN102967022 A CN 102967022A
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Abstract
The invention discloses a control method for starting a variable-frequency compressor of a multi-connected air conditioning unit, and the control method comprises the following steps of a, opening the variable-frequency compressor (1) and maintaining the starting frequency for 30s to 60s; b, judging whether the target frequency value at the moment is greater than the first running frequency or not, and maintaining the target frequency value if the target frequency value is not greater than the first running frequency; otherwise maintaining the first running frequency for 3min to 5min; c, judging whether the target frequency value at the moment is greater than the second running frequency, and maintaining the target frequency value if the target frequency value is not greater than the second running frequency; and otherwise maintaining the second running frequency for 15min to 20min; and d, maintaining the target frequency value at the moment to run continuously. The control method can reduce the noise, save the energy consumption, guarantee the stability of the variable-frequency compressor, reduce the fault rate and can prolong the service life.
Description
Technical field
The present invention relates to VRF Air Conditioning System, specifically is a kind of frequency-changeable compressor of the VRF Air Conditioning System control method when starting.
Background technology
The VRF Air Conditioning System of prior art comprises an off-premises station, a plurality of indoor set parallel with one another and two refrigerant circulation house stewards that connect each indoor set and off-premises station.This off-premises station is communicated with a plurality of indoor sets after the parallel connection by two refrigerants circulation house stewards.
Each off-premises station comprises invariable frequency compressor parallel with one another and frequency-changeable compressor, oil eliminator, four-way change-over valve, outdoor heat exchanger (being condenser during refrigeration mode), reservoir and gas-liquid separator.The public port of export of two compressors after the parallel connection is communicated with an end of oil eliminator, the other end of oil eliminator is communicated with the first valve port of four-way change-over valve, four-way change-over valve the second valve port is communicated with outdoor heat exchanger one end, the outdoor heat exchanger other end is communicated with an end of reservoir, one among the other end of reservoir and the two refrigerants circulation house stewards is communicated with, and another root refrigerant circulation house steward among two refrigerants circulation house steward is communicated with four-way change-over valve the 3rd valve port of each off-premises station, four-way change-over valve the 4th valve port is communicated with an end of gas-liquid separator, and the public arrival end of two compressors after the other end of gas-liquid separator and the parallel connection is communicated with.
Each indoor set comprises interior organic electronic expansion valve and indoor heat exchanger (being evaporimeter during refrigeration mode), one end of indoor heat exchanger is communicated with an end of interior organic electronic expansion valve, one among the other end of interior organic electronic expansion valve and the two refrigerants circulation house stewards is communicated with, and another root refrigerant pipe that the other end of indoor heat exchanger and two refrigerants circulate among the house stewards is communicated with.
During refrigeration mode, the first valve port of four-way change-over valve is communicated with the second valve port, and the 3rd valve port is communicated with the 4th valve port, and namely refrigerant is along compressor, outdoor heat exchanger, indoor heat exchanger, this route circulation of compressor.During heating mode, the first valve port of four-way change-over valve is communicated with the 3rd valve port, and the second valve port is communicated with the 4th valve port, and refrigerant is along compressor, indoor heat exchanger, outdoor heat exchanger, this route circulation of compressor.
Frequency-changeable compressor is electrically connected with the air-conditioning master controller, by the output frequency of air-conditioning main controller controls frequency-changeable compressor.And the master controller of air-conditioning can according to the temperature of room temperature and user's setting, calculate a target frequency value of frequency-changeable compressor operation, and this target frequency value can according to the temperature difference between room actual temperature and the user's design temperature, be adjusted in real time.
The process of the compressor start of multi-connected air conditioner is: invariable frequency compressor and frequency-changeable compressor are opened simultaneously, the quick raising frequency of invariable frequency compressor is to operating frequency and stabilized frequency operation, and the quick raising frequency of frequency-changeable compressor is to starting frequency, and keep the startup frequency to move 30 seconds, then directly fast raising frequency and keeps this maximum operating frequency operation to the maximum operating frequency of this frequency-changeable compressor.This is because air-conditioning unit when just having started shooting, the temperature difference between room actual temperature and the user's design temperature is maximum, the load of machine maximum in the ability need of machine namely like this, so also maximum according to the target frequency value that interior machine load gauge is calculated, and this target frequency value generally all can meet or exceed the maximum operating frequency of frequency-changeable compressor, for the requirement of satisfying fast-refrigerating or heating, frequency-changeable compressor can move from starting the direct raising frequency of frequency to maximum operating frequency.And air-conditioning is when maximum operating frequency is moved, and noise is very large, and user's endurable can't be fallen asleep, and the energy consumption of unit is excessive, and the running frequency of frequency-changeable compressor is extremely unstable, and fault rate is high, the mission lost of life.
Summary of the invention
The technical problem to be solved in the present invention is, provide a kind of can reduce noise, energy efficient and guarantee that frequency-changeable compressor is stable, the control method the when frequency-changeable compressor of reduce trouble, the VRF Air Conditioning System that increases the service life starts.
Technical solution of the present invention is, the control method when providing a kind of frequency-changeable compressor of VRF Air Conditioning System to start, and its concrete steps are as follows:
A, open frequency-changeable compressor, and raising frequency is to starting frequency, and keeps this startup frequency operation 30 seconds ~ 60 seconds;
B, whether judge this moment target frequency value greater than the first running frequency, if not, then raising frequency is to this moment target frequency value, and keeps this target frequency value operation, and whole startup control procedure finishes; If so, raising frequency to the first running frequency then, and keep the first running frequency operation 3 minutes ~ 5 minutes, enter again next step;
C, whether judge this moment target frequency value greater than the second running frequency, if not, then raising frequency is to this moment target frequency value, and keeps this target frequency value operation, and whole startup control procedure finishes; If so, raising frequency to the second running frequency then, and keep the second running frequency operation 15 minutes ~ 20 minutes, enter again next step;
Whether d, judgement target frequency value this moment if not, then are downconverted to this moment target frequency value greater than the second running frequency, and keep target frequency value this moment to continue operation; If so, then raising frequency target frequency value extremely this moment, and maintenance target frequency value continuation operation this moment.
This controlling party ratio juris is: after the frequency-changeable compressor of VRF Air Conditioning System system starts, elder generation's raising frequency is to starting frequency operation a period of time, then, no longer blindly for fast-refrigerating or heat direct raising frequency to maximum operating frequency, but raising frequency to the first running frequency, operation a period of time, at this moment, unit in the operation of the first running frequency after a while, the temperature difference between room actual temperature and the user's design temperature reduces, the like this ability need of the indoor set corresponding reduction of namely loading, frequency-changeable compressor target frequency value this moment is corresponding the reduction also, if target frequency value this moment has been lower than the second running frequency, then directly raising frequency to target frequency value is this moment moved, if target frequency value this moment still is higher than the second running frequency, then raising frequency to the second running frequency is reruned a period of time; Keep the second running frequency after operation a period of time, the temperature difference between room actual temperature and the user's design temperature further reduces, the ability need of indoor set is namely loaded and is further reduced like this, frequency-changeable compressor target frequency value has this moment also further reduced, target frequency value this moment generally can be far below maximum operating frequency, subsequently, keep again target frequency operation this moment to get final product, like this, in the whole start-up course, shorten the time of frequency-changeable compressor with the maximum operation frequency operation, even avoided the situation of frequency-changeable compressor with the maximum operation frequency operation fully.
Adopt above method, the control method the when frequency-changeable compressor of VRF Air Conditioning System of the present invention starts compared with prior art has the following advantages:
By this control method, can be at utmost even avoid completely frequency-changeable compressor to move with maximum operating frequency, like this, decrease noise, decrease energy consumption so that the frequency-changeable compressor running frequency is stable, reduce trouble increases the service life.
As improvement, this starts frequency operation 60 seconds the described maintenance of step a, keep starting frequency operation 60 seconds, it is a time point of best results, can avoid as far as possible frequency-changeable compressor to move in maximum operating frequency at last, again not can owing to after for a long time in low frequency operation, so that unit refrigeration or to heat speed excessively slow.
As improving again, described maintenance the first running frequency operation of step b 3 minutes, 3 minutes is the optimum time point with the first frequency operation, this time point draws through repeatedly calculating, testing, can avoid as much as possible frequency-changeable compressor at last in maximum operating frequency operation, again can be owing to not crossing for a long time in the lower frequency operation so that freeze, to heat speed excessively slow.
As further improving again, described maintenance the second running frequency operation of step c 20 minutes, 20 minutes is the optimum time point with the second frequency operation, this time point draws through repeatedly calculating, testing, both avoided as much as possible frequency-changeable compressor at last in maximum operating frequency operation, again can be owing to not crossing for a long time in the lower frequency operation so that freeze, to heat speed excessively slow.
As also further improving, the first running frequency is any one numerical value among 45 ~ 50Hz, when the first running frequency is in this scope, can more effectively avoid frequency-changeable compressor need to move in maximum operating frequency at last, again can be owing to underfrequency so that refrigeration, to heat speed excessively slow.
As further improving again, the preferred 50Hz of the first running frequency, this numerical value draws through repeated multiple times calculation and test, with this frequency operation, the frequency-changeable compressor of avoiding that can be the most effective need to move in maximum operating frequency at last, again can be owing to underfrequency so that refrigeration, to heat speed excessively slow.
As further improving again again, the second running frequency is any one numerical value among 65 ~ 70Hz, when the second running frequency is in this scope, can more effectively avoid frequency-changeable compressor need to move in maximum operating frequency at last, again can be owing to underfrequency so that refrigeration, to heat speed excessively slow.
As also further improving again, the preferred 70Hz of the second running frequency, this numerical value draws through repeated multiple times calculation and test, with this frequency operation, the frequency-changeable compressor of avoiding that can be the most effective need to move in maximum operating frequency at last, again can be owing to underfrequency so that refrigeration, to heat speed excessively slow.
Description of drawings
Fig. 1 is the systematic schematic diagram of the frequency-changeable compressor of the implementing VRF Air Conditioning System of the present invention control method when starting.
Fig. 2 is the frequency-changeable compressor running frequency of the control method of the frequency-changeable compressor of VRF Air Conditioning System of the present invention when starting and the coordinate diagram of time.
Shown in the figure 1, frequency-changeable compressor, 2, invariable frequency compressor.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the control method the when frequency-changeable compressor of VRF Air Conditioning System of the present invention starts, its concrete steps are as follows.
A, open frequency-changeable compressor 1, and raising frequency is to starting frequency, and keeps this startup frequency operation 30 seconds ~ 60 seconds, preferably keep this startups frequency to move 60 seconds; The startup frequency is 30Hz.
B, whether judge this moment target frequency value greater than the first running frequency, if not, then raising frequency is to this moment target frequency value, and keeps this target frequency value operation, and whole startup control procedure finishes; If so, raising frequency to the first running frequency then, and keep the first running frequency operation 3 minutes ~ 5 minutes, and preferably keep the first running frequency operation 3 minutes, enter again next step; The first running frequency is any one numerical value among 45 ~ 50Hz, preferred 50Hz.
C, whether judge this moment target frequency value greater than the second running frequency, if not, then raising frequency is to this moment target frequency value, and keeps this target frequency value operation, and whole startup control procedure finishes; If so, raising frequency to the second running frequency then, and keep the second running frequency operation 15 minutes ~ 20 minutes, and preferably keep the second running frequency operation 20 minutes, enter again next step; The second running frequency is any one numerical value among 65 ~ 70Hz, preferred 70Hz.
Whether d, judgement target frequency value this moment if not, then are downconverted to this moment target frequency value greater than the second running frequency, and keep target frequency value this moment to continue operation; If so, then raising frequency target frequency value extremely this moment, and maintenance target frequency value continuation operation this moment.
When frequency-changeable compressor 1 was opened, the invariable frequency compressor 2 in parallel with this frequency-changeable compressor 1 also opened, and invariable frequency compressor 2 is the same with prior art, and raising frequency is to operating frequency and stabilized frequency operation fast.
An embodiment of the control method when as shown in Figure 2, the frequency-changeable compressor of VRF Air Conditioning System of the present invention starts is as follows.
A, open frequency-changeable compressor 1, and raising frequency is to starting namely 30Hz of frequency, and keeps this startup frequency operation 60 seconds.
B, keep starting the frequency operation after 60 seconds at frequency-changeable compressor 1, the master controller of air-conditioning can be according to this moment indoor actual temperature and the temperature difference between user's design temperature, calculate target frequency value this moment, if this value is 88Hz, greater than the first running frequency 50Hz, then raising frequency to 50 Hz operation is 3 minutes, enters next step again.
C, keep the first running frequency 50Hz operation after 3 minutes at frequency-changeable compressor 1, the master controller of air-conditioning can be according to this moment indoor actual temperature and the temperature difference between user's design temperature, calculate target frequency value this moment, if this value is 83Hz, greater than the second running frequency 70 Hz, then raising frequency to 70 Hz operation is 20 minutes, enters next step again.
D, keeping the second running frequency 70 Hz operation after 20 minutes, the master controller of air-conditioning can according to this moment indoor actual temperature and the temperature difference between user's design temperature, calculate target frequency value this moment.If this value is the 68Hz less than the second running frequency 70 Hz, then is downconverted to 68Hz and continues operation.Whole startup control procedure finishes.
Illustrate, another embodiment of the control method the when frequency-changeable compressor of VRF Air Conditioning System of the present invention starts is as follows.
A, open frequency-changeable compressor 1, and raising frequency is to starting namely 30Hz of frequency, and keeps this startup frequency operation 60 seconds.
B, keep starting the frequency operation after 60 seconds at frequency-changeable compressor 1, the master controller of air-conditioning can be according to this moment indoor actual temperature and the temperature difference between user's design temperature, calculate target frequency value this moment, if this value is 72Hz, greater than the first running frequency 50Hz, then raising frequency to 50 Hz operation is 3 minutes, enters next step again.
C, keep the first running frequency 50Hz operation after 3 minutes at frequency-changeable compressor 1, the master controller of air-conditioning can be according to this moment indoor actual temperature and the temperature difference between user's design temperature, calculate target frequency value this moment, if the target frequency value this moment of calculating is 68Hz, less than the second running frequency 70 Hz, then keep target frequency value 68Hz operation this moment, whole startup control procedure just is through with.
Illustrate, the control method the when frequency-changeable compressor of VRF Air Conditioning System of the present invention starts also an embodiment is as follows.
A, open frequency-changeable compressor 1, and raising frequency is to starting namely 30Hz of frequency, and keeps this startup frequency operation 60 seconds.
B, keep starting the frequency operation after 60 seconds at frequency-changeable compressor 1, the master controller of air-conditioning can be according to this moment indoor actual temperature and the temperature difference between user's design temperature, calculate target frequency value this moment, if the target frequency value this moment of calculating is 48Hz, less than the first running frequency 50Hz, then keep target frequency value 48Hz operation this moment, whole startup control procedure just is through with.
Claims (9)
1. the control method the when frequency-changeable compressor of a VRF Air Conditioning System starts, it is characterized in that: its concrete steps are as follows:
A, open frequency-changeable compressor (1), and raising frequency is to starting frequency, and keeps this startup frequency operation 30 seconds ~ 60 seconds;
B, whether judge this moment target frequency value greater than the first running frequency, if not, then raising frequency is to this moment target frequency value, and keeps this target frequency value operation, and whole startup control procedure finishes; If so, raising frequency to the first running frequency then, and keep the first running frequency operation 3 minutes ~ 5 minutes, enter again next step;
C, whether judge this moment target frequency value greater than the second running frequency, if not, then raising frequency is to this moment target frequency value, and keeps this target frequency value operation, and whole startup control procedure finishes; If so, raising frequency to the second running frequency then, and keep the second running frequency operation 15 minutes ~ 20 minutes, enter again next step;
Whether d, judgement target frequency value this moment if not, then are downconverted to this moment target frequency value greater than the second running frequency, and keep target frequency value this moment to continue operation; If so, then raising frequency target frequency value extremely this moment, and maintenance target frequency value continuation operation this moment.
2. the control method the when frequency-changeable compressor of VRF Air Conditioning System according to claim 1 starts is characterized in that: this startup frequency operation of the described maintenance of step a 60 seconds.
3. the control method the when frequency-changeable compressor of VRF Air Conditioning System according to claim 1 starts is characterized in that: described maintenance the first running frequency operation of step b 3 minutes.
4. the control method the when frequency-changeable compressor of VRF Air Conditioning System according to claim 1 starts is characterized in that: described maintenance the second running frequency operation of step c 20 minutes.
5. the control method the when frequency-changeable compressor of VRF Air Conditioning System according to claim 1 starts, it is characterized in that: the startup frequency is 30Hz.
6. the control method the when frequency-changeable compressor of VRF Air Conditioning System according to claim 1 starts, it is characterized in that: the first running frequency is any one numerical value among 45 ~ 50Hz.
7. the control method the when frequency-changeable compressor of VRF Air Conditioning System according to claim 6 starts, it is characterized in that: the first running frequency is 50Hz.
8. the control method the when frequency-changeable compressor of VRF Air Conditioning System according to claim 1 starts, it is characterized in that: the second running frequency is any one numerical value among 65 ~ 70Hz.
9. the control method the when frequency-changeable compressor of VRF Air Conditioning System according to claim 8 starts, it is characterized in that: the second running frequency is 70Hz.
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| CN103423929A (en) * | 2013-09-02 | 2013-12-04 | 合肥美的电冰箱有限公司 | Variable-frequency refrigeration equipment |
| CN106322650A (en) * | 2016-08-19 | 2017-01-11 | 青岛海尔空调器有限总公司 | Air conditioner frequency control method |
| CN104266311B (en) * | 2014-10-08 | 2017-05-10 | 美的集团股份有限公司 | Air conditioner and control method and device thereof |
| CN106871379A (en) * | 2017-03-30 | 2017-06-20 | 广东美的暖通设备有限公司 | Air-conditioning system and its compressor control method and device |
| CN107606837A (en) * | 2017-10-31 | 2018-01-19 | 南京创维电器研究院有限公司 | A kind of frequency-changeable compressor control method, device and frequency conversion refrigerator |
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| CN103423929A (en) * | 2013-09-02 | 2013-12-04 | 合肥美的电冰箱有限公司 | Variable-frequency refrigeration equipment |
| CN104266311B (en) * | 2014-10-08 | 2017-05-10 | 美的集团股份有限公司 | Air conditioner and control method and device thereof |
| CN106322650B (en) * | 2016-08-19 | 2019-07-23 | 青岛海尔空调器有限总公司 | Air-conditioning control method for frequency |
| CN106322650A (en) * | 2016-08-19 | 2017-01-11 | 青岛海尔空调器有限总公司 | Air conditioner frequency control method |
| CN106871379A (en) * | 2017-03-30 | 2017-06-20 | 广东美的暖通设备有限公司 | Air-conditioning system and its compressor control method and device |
| CN106871379B (en) * | 2017-03-30 | 2019-12-03 | 广东美的暖通设备有限公司 | Air-conditioning system and its compressor control method and device |
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| CN110594979B (en) * | 2018-11-12 | 2024-01-23 | 杭州三花微通道换热器有限公司 | Control method of air conditioning system |
| CN110594979A (en) * | 2018-11-12 | 2019-12-20 | 杭州三花微通道换热器有限公司 | Control method of air conditioning system |
| US11221158B2 (en) | 2018-11-12 | 2022-01-11 | Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. | Control method for air conditioning system, and air conditioning system |
| CN109611989B (en) * | 2018-12-12 | 2021-02-05 | 广东智科电子股份有限公司 | Device and method for synchronously adjusting temperature of cold and hot water machine and frequency of press |
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| CN110486903A (en) * | 2019-08-15 | 2019-11-22 | 海信（山东）空调有限公司 | The control method and system of loaded self-adaptive when a kind of frequency-variable controller closed-loop start-up |
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| CN113606758A (en) * | 2021-06-28 | 2021-11-05 | 杭州先途电子有限公司 | Control method, control device and outdoor controller of air conditioner |
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Application publication date: 20130313 |