CN102914026A - Control method for preventing refrigerant of outdoor unit of multi-linkage air conditioning unit from deflecting during heating - Google Patents
Control method for preventing refrigerant of outdoor unit of multi-linkage air conditioning unit from deflecting during heating Download PDFInfo
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Abstract
The invention discloses a control method for preventing the refrigerant of the outdoor units of a multi-linkage air conditioning unit from deflecting during heating, comprising the following steps: (a) starting a part of outdoor units (1); (b) measuring the temperature Tcm of the middle part of the coil pipe of each indoor unit (10), and calculating the average value Tm of the temperature Tcm of the middle part of the coil pipe of each operating indoor unit (10); (c) judging whether the average value Tm is higher than 60 DEG C or not, carrying out the step (e) if the average value Tm is higher than 60 DEG C; (d) measuring the outlet pressure P of compressors (2) of the outdoor units (1), judging whether the outlet pressure P of compressors (2) is more than 3.75Mpa or not, carrying out the step (e) if the outlet pressure P of compressors (2) is more than 3.75Mpa, and carrying out the step (f) if the outlet pressure P of compressors (2) is not more than 3.75Mpa; (e) opening electromagnetic valves (6) on refrigerant liquid pipes (7) of the non-operating outdoor units (1); and (f) repeating the steps (b), (c), (d) and (e) at set intervals until the units stop. The control method can be used for automatically adjusting the refrigerant of the outdoor units to prevent the refrigerant from deflecting during heating.
Description
Technical field
The present invention relates to VRF Air Conditioning System, specifically is the control method that a kind of VRF Air Conditioning System prevents the bias current of off-premises station refrigerant when heating.
Background technology
The VRF Air Conditioning System of prior art comprises a plurality of off-premises stations parallel with one another, a plurality of indoor set parallel with one another and two refrigerant circulation house stewards that connect each indoor set and each off-premises station.A plurality of off-premises stations after the parallel connection are communicated with a plurality of indoor sets after the parallel connection by two refrigerants circulation house stewards.
Each off-premises station comprises compressor, oil eliminator, four-way change-over valve, reservoir, outdoor heat exchanger (being evaporimeter during heating mode) and gas-liquid separator.Compressor outlet 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, one among four-way change-over valve the second valve port and the two refrigerants circulation house stewards is communicated with, and another root refrigerant house steward among two refrigerants circulation house steward is communicated with an end of reservoir through the cooling medium liquid pipe, this cooling medium liquid pipe is provided with magnetic valve, the other end of reservoir is communicated with an end of outdoor heat exchanger, the other end of outdoor heat exchanger is communicated with the 3rd valve port of four-way change-over valve, the 4th valve port of four-way change-over valve is communicated with an end of gas-liquid separator, and the other end of gas-liquid separator is communicated with the suction port of compressor.
Each indoor set comprises interior organic electronic expansion valve and indoor heat exchanger (being condenser during heating 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 the house steward that circulates is communicated with for the other end of indoor heat exchanger and another root refrigerant among two refrigerants circulation house stewards.
During heating 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, indoor heat exchanger, outdoor heat exchanger, this route circulation of compressor.
The middle part of the heat exchange coil of indoor heat exchanger is provided with a temperature inductor, and the outlet of compressor is provided with a pressure sensor.Magnetic valve on the cooling medium liquid pipe between above-mentioned temperature inductor, pressure sensor and reservoir and refrigerant circulation house steward all is electrically connected with the air-conditioning master controller.
VRF Air Conditioning System can be regulated according to interior machine workload demand the number of the off-premises station of work, and when interior function power demand was high, all off-premises station operations when interior function power demand is low, only had the operation of part off-premises station.Such as the long-time running of fruit part off-premises station and other off-premises station does not move for a long time, just cause heating easily the agent bias current, namely the refrigerant of the off-premises station of operation is too much, the off-premises station refrigerant that does not move is very few, in case the refrigerant of off-premises station is too much, high voltage fault then appears easily, shorten the service life of unit.
Summary of the invention
The technical problem to be solved in the present invention is that the control method of off-premises station refrigerant bias current is provided when providing a kind of VRF Air Conditioning System that can automatically regulate to heat.
Technical solution of the present invention is, the control method of off-premises station refrigerant bias current is provided when providing a kind of VRF Air Conditioning System to heat, and its concrete steps are as follows:
A, VRF Air Conditioning System is adjusted to heating mode, and with compressor start operation a period of time of part off-premises station, and other off-premises station is not started shooting;
The temperature inductor at the coil pipe middle part of b, the indoor heat exchanger by each indoor set of moving is measured the coil pipe middle part temperature T of this each indoor set
CmAnd temperature-measuring results sent to the air-conditioning master controller, the air-conditioning master controller is with the coil pipe middle part temperature T of each indoor set
CmThe phase adduction is sentenced the number of the indoor set of operation, calculates the mean value T of the coil pipe middle part temperature of each operation indoor set
m
The mean value T of the coil pipe middle part temperature of c, each operation indoor set
mWhether greater than 60 ℃, if so, then enter step e; If not, enter next step;
The pressure sensor of d, the compressor outlet by the off-premises station that moving is measured the compressor delivery pressure value P of this off-premises station, and the result sent to the air-conditioning master controller, judge that whether compressor delivery pressure value P is greater than 3.75Mpa, if yes then enter step e, if not, then directly enter step f;
E, open the magnetic valve on the cooling medium liquid pipe of the off-premises station that does not move, until the mean value T of the coil pipe middle part temperature of each operation indoor set
mLess than 3.1Mpa, then close the magnetic valve on the cooling medium liquid pipe of the off-premises station that does not move less than the compressor delivery pressure value P of off-premises station of 52 ℃ or operation;
F, every certain interval of time, repeating step b ~ e is until shut down.
This controlling party ratio juris is: during the VRF Air Conditioning System heating operation, in case the compressor delivery pressure of this off-premises station is excessive or the mean value of each indoor heat exchanger coil pipe middle part temperature of moving is too high, the refrigerant that just can judge the off-premises station that is moving is too much, bias current appears, at this moment, open the magnetic valve of the cooling medium liquid pipe of off-duty off-premises station, just can so that the refrigerant of the too much off-premises station of refrigerant enter the reservoir and outdoor heat exchanger of off-duty off-premises station from this magnetic valve, so that the refrigerant in the too much off-premises station of the refrigerant that is moving reduces, pressure decreased is alleviated and is improved the refrigerant bias current.
Adopt above method, VRF Air Conditioning System of the present invention prevents the bias current of off-premises station refrigerant when heating control method compared with prior art has the following advantages:
By this control method, can effectively alleviate the situation of improving the bias current of the different off-premises station refrigerant of VRF Air Conditioning System, avoid the many off-premises stations of refrigerant high voltage fault to occur, prolong unit service life, prevent that simultaneously the very few off-premises station heating effect of refrigerant is bad, and the several judgement data in this control method, such as the mean value T of temperature in the middle part of the coil pipe of each operation indoor set
mWhether greater than 60 ℃, compressor delivery pressure value P whether greater than 3.75Mpa and judge that judgement data compression machine outlet pressure value P that adjustment process finishes is less than the mean value T of the coil pipe middle part temperature of 3.1Mpa, each operation indoor set
mAll be optimum data through repetition test screening and checking less than 52 ℃ of grades, above-mentioned a series of data, namely not too sensitivity caused crossing too early repeatedly to regulate wasting the unit energy, can not cause regulating the untimely high voltage fault that occurs owing to too blunt yet.
As improvement, described a period of time of step a refers to 5 ~ 10 minutes, be that compressor operating begins to regulate Biased flow phenomenon after 5 ~ 10 minutes, because this VRF Air Conditioning System after operation a period of time, just begins to occur Biased flow phenomenon, by evidence, move after 5 ~ 10 minutes and to regulate more accurately, too early regulate, bias current can not occur, need not regulate, the high voltage fault that the words bias current of regulating too late causes has caused harmful effect.
As improving again, described a period of time of step a refers to 10 minutes, be that 10 minutes these time points of compressor operating begin to regulate Biased flow phenomenon, prove by repetition test, this time point was the most accurate in 10 minutes, too early regulated, and bias current can not occur, need not regulate, the high voltage fault that the words bias current of regulating too late causes has caused harmful effect.
As further improving, described a period of time of step f refers to 10 ~ 30 seconds again, and that namely regulates is spaced apart 10 ~ 30 seconds at every turn, and better to the regulating effect of bias current, this draws through overtesting, if adjusting is too frequent, there is no need; If regulate number of times very little, the dynamics that bias current is regulated is inadequate.
As also further improving, described a period of time of step e refers to 15 seconds, and namely every interval was regulated once in 15 seconds, and best to the regulating effect of bias current, this draws through repetition test, if adjusting is too frequent, there is no need; If regulate number of times very little, the dynamics that bias current is regulated is inadequate.
Description of drawings
Fig. 1 is the systematic schematic diagram that VRF Air Conditioning System of the present invention prevents the control method of off-premises station refrigerant bias current when heating.
Shown in the figure 1, off-premises station, 2, compressor, 3, outdoor heat exchanger, 4, temperature inductor, 5, pressure sensor, 6, magnetic valve, 7, the cooling medium liquid pipe, 8, reservoir, 9, refrigerant circulation house steward, 10, indoor set, 11, indoor heat exchanger.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, VRF Air Conditioning System of the present invention prevents the control method of off-premises station refrigerant bias current when heating, and its concrete steps are as follows.
A, VRF Air Conditioning System is adjusted to heating mode, and with 2 start operation a period of times of compressor of part off-premises station 1, and other off-premises station 1 is not started shooting; A period of time in this step refers to 5 ~ 10 minutes, preferred 10 minutes.
The temperature inductor 4 at the coil pipe middle part of b, the indoor heat exchanger 11 by each indoor set 10 of moving is measured the coil pipe middle part temperature T of the indoor heat exchanger 11 of these each indoor sets 10
CmAnd temperature-measuring results sent to the air-conditioning master controller, the air-conditioning master controller is with the coil pipe middle part temperature T of each indoor set 10
CmThe phase adduction is sentenced the number of the indoor set 10 of operation, calculates the mean value T of the coil pipe middle part temperature of each operation indoor set 10
m
The mean value T of the coil pipe middle part temperature of c, each operation indoor set 10
mWhether greater than 60 ℃, if so, then enter step e; If not, enter next step.
The pressure sensor 5 of d, compressor 2 outlets by the off-premises station 1 that moving is measured the compressor 2 outlet pressure value P of these off-premises stations 1, and the result sent to the air-conditioning master controller, judge that whether compressor 2 outlet pressure value P are greater than 3.75Mpa, if yes then enter step e, if not, then directly enter step f.
E, open the magnetic valve 6 on the cooling medium liquid pipe 7 of the off-premises station 1 that does not move, until the mean value T of the coil pipe middle part temperature of each operation indoor set 10
mLess than 3.1Mpa, then close the magnetic valve 6 on the cooling medium liquid pipe 7 of the off-premises station 1 that does not move less than the compressor 2 outlet pressure value P of off-premises station 1 of 52 ℃ or operation.This magnetic valve 6 is the magnetic valves 6 on the cooling medium liquid pipe 7 between the refrigerant circulation house steward 9 of the reservoir 8 of off-premises station 1 and VRF Air Conditioning System, in case open the magnetic valve 6 of the off-premises station 1 that does not move, refrigerant just can enter through this magnetic valve 6 reservoir 8 and the outdoor heat exchanger 3 of the off-premises station 1 that does not move.Mean value T when the coil pipe middle part of the indoor set 10 of each operation temperature
mSatisfy less than these two conditions of 3.1Mpa less than the compressor 2 outlet pressure value P of the off-premises station 1 of 52 ℃ or operation under one the prerequisite, the magnetic valve 6 of just cutting out the off-premises station 1 that does not move finishes to regulate.
F, every certain interval of time, repeating step b ~ e is until shut down; A period of time in this step refers to 10 ~ 30 seconds, preferred 15 seconds.
Claims (5)
1. prevent the control method of off-premises station refrigerant bias current when a VRF Air Conditioning System heats, it is characterized in that: its concrete steps are as follows:
A, VRF Air Conditioning System is adjusted to heating mode, and with compressor (2) start operation a period of time of part off-premises station (1), and other off-premises station (1) is not started shooting;
The temperature inductor (4) at the coil pipe middle part of b, the indoor heat exchanger (11) by each indoor set (10) of moving is measured the coil pipe middle part temperature T of this each indoor set (10)
CmAnd temperature-measuring results sent to the air-conditioning master controller, the air-conditioning master controller is with the coil pipe middle part temperature T of each indoor set (10)
CmThe phase adduction is sentenced the number of the indoor set (10) of operation, calculates the mean value T of the coil pipe middle part temperature of each operation indoor set (10)
m
The mean value T of the coil pipe middle part temperature of c, each operation indoor set (10)
mWhether greater than 60 ℃, if so, then enter step e; If not, enter next step;
The pressure sensor (5) of d, compressor (2) outlet by the off-premises station (1) that moving is measured compressor (2) the outlet pressure value P of this off-premises station (1), and the result sent to the air-conditioning master controller, judge that whether compressor (2) outlet pressure value P is greater than 3.75Mpa, if yes then enter step e, if not, then directly enter step f;
E, open the magnetic valve (6) on the cooling medium liquid pipe (7) of the off-premises station (1) that does not move, until the mean value T of the coil pipe of each operation indoor set (10) middle part temperature
mLess than 3.1Mpa, then close the magnetic valve (6) on the cooling medium liquid pipe (7) of the off-premises station (1) that does not move less than compressor (2) the outlet pressure value P of off-premises station (1) of 52 ℃ or operation;
F, every certain interval of time, repeating step b ~ e is until shut down.
2. prevent the control method of off-premises station refrigerant bias current when VRF Air Conditioning System according to claim 1 heats, it is characterized in that: described a period of time of step a refers to 5 ~ 10 minutes.
3. prevent the control method of off-premises station refrigerant bias current when VRF Air Conditioning System according to claim 2 heats, it is characterized in that: described a period of time of step a refers to 10 minutes.
4. prevent the control method of off-premises station refrigerant bias current when VRF Air Conditioning System according to claim 1 heats, it is characterized in that: described a period of time of step f refers to 10 ~ 30 seconds.
5. prevent the control method of off-premises station refrigerant bias current when VRF Air Conditioning System according to claim 4 heats, it is characterized in that: described a period of time of step f refers to 15 seconds.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210349911.6A CN102914026B (en) | 2012-09-20 | 2012-09-20 | Control method for preventing refrigerant of outdoor unit of multi-linkage air conditioning unit from deflecting during heating |
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| CN201210349911.6A CN102914026B (en) | 2012-09-20 | 2012-09-20 | Control method for preventing refrigerant of outdoor unit of multi-linkage air conditioning unit from deflecting during heating |
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| CN103604193A (en) * | 2013-11-22 | 2014-02-26 | 四川长虹电器股份有限公司 | Multi-outdoor-unit air conditioning pressure balancing device and pressure balancing control method |
| CN105241027A (en) * | 2015-10-30 | 2016-01-13 | 广东美的暖通设备有限公司 | Multi-split air-conditioning system and fault detection method for heat exchanging valves of multi-split air-conditioning system |
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| CN111271855A (en) * | 2020-03-24 | 2020-06-12 | 珠海格力电器股份有限公司 | Method for improving bias flow of modular multi-split air conditioning unit and air conditioning unit |
| CN111271855B (en) * | 2020-03-24 | 2021-10-01 | 格力电器（杭州）有限公司 | Method for improving bias flow of modular multi-split air conditioning unit and air conditioning unit |
| CN114484720A (en) * | 2022-01-17 | 2022-05-13 | 青岛海尔空调电子有限公司 | Method and device for controlling air conditioner, air conditioner and storage medium |
| CN114484720B (en) * | 2022-01-17 | 2024-06-07 | 青岛海尔空调电子有限公司 | Method and device for controlling air conditioner, air conditioner and storage medium |
| CN114674063A (en) * | 2022-04-22 | 2022-06-28 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner system |
| CN114674063B (en) * | 2022-04-22 | 2023-10-20 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner system |
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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. |