CN102914026B - 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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- CN102914026B CN102914026B CN201210349911.6A CN201210349911A CN102914026B CN 102914026 B CN102914026 B CN 102914026B CN 201210349911 A CN201210349911 A CN 201210349911A CN 102914026 B CN102914026 B CN 102914026B
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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, is specifically 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 multiple off-premises station parallel with one another, multiple indoor set parallel with one another and connects two refrigerant circulation house stewards of each indoor set and each off-premises station.Multiple off-premises stations after parallel connection are communicated with the multiple indoor sets after parallel connection by two refrigerant 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 one end of oil eliminator, the other end of oil eliminator is communicated with the first valve port of four-way change-over valve, one of circulating in house steward is communicated with for four-way change-over valve second valve port and two refrigerants, and another root refrigerant house steward in two refrigerant circulation house stewards is communicated with one end of reservoir through cooling medium liquid pipe, this cooling medium liquid pipe is provided with magnetic valve, the other end of reservoir is communicated with one 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, 4th valve port of four-way change-over valve is communicated with one end of gas-liquid separator, the other end of gas-liquid separator is communicated with 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 one end of interior organic electronic expansion valve, one that the other end and two refrigerants of interior organic electronic expansion valve circulate in house steward is communicated with, and the house steward that circulates is communicated with for the other end and two refrigerants another root refrigerant circulated in house steward of indoor heat exchanger.
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, the circulation of this route 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 cooling medium liquid pipe between above-mentioned temperature inductor, pressure sensor and reservoir and a refrigerant circulation house steward is all electrically connected with air-conditioning master controller.
VRF Air Conditioning System can regulate the number of the off-premises station of work according to interior machine workload demand, time interior capabilities demand is high, whole off-premises station runs, and time interior capabilities demand is low, only has part off-premises station to run.As fruit part off-premises station longtime running, other off-premises station does not run for a long time, and just easily cause heating agent bias current, the refrigerant of the off-premises station namely run is too much, the off-premises station refrigerant do not run is very few, once the refrigerant of off-premises station is too much, then easily there is high voltage fault, shorten the service life of unit.
Summary of the invention
The technical problem to be solved in the present invention is, prevents the control method of off-premises station refrigerant bias current when providing a kind of VRF Air Conditioning System that can automatically regulate to heat.
Technical solution of the present invention is, prevent the control method of off-premises station refrigerant bias current when providing a kind of VRF Air Conditioning System to heat, its concrete steps are as follows:
A, VRF Air Conditioning System is adjusted to heating mode, and the start of the compressor of part off-premises station is run a period of time, and other off-premises station is not started shooting;
B, measured the coil pipe middle portion temperature T of this each indoor set by the temperature inductor in the middle part of the coil pipe of the indoor heat exchanger of each indoor set that running
cmand temperature-measuring results is sent to air-conditioning master controller, air-conditioning master controller is by the coil pipe middle portion temperature T of each indoor set
cmphase adduction sentences the number of the indoor set of operation, calculates the mean value T that each runs the coil pipe middle portion temperature of indoor set
m;
The mean value T of the coil pipe middle portion temperature of c, each operation indoor set
mwhether be greater than 60 DEG C, if so, then enter step e; If not, next step is entered;
D, measured the compressor delivery pressure value P of this off-premises station by the pressure sensor of the compressor outlet of off-premises station run, and result is sent to air-conditioning master controller, judge whether compressor delivery pressure value P is greater than 3.75Mpa, if yes then enter step e, if not, then directly step f is entered;
E, the magnetic valve opened on the cooling medium liquid pipe of the off-premises station do not run, until each runs the mean value T of the coil pipe middle portion temperature of indoor set
mbe less than 52 DEG C or the compressor delivery pressure value P of off-premises station that runs is less than 3.1Mpa, then close the magnetic valve on the cooling medium liquid pipe of the off-premises station do not run;
F, at interval of a period of time, repeat step b ~ e, until shut down.
This controlling party ratio juris is: during VRF Air Conditioning System heating operation, once the compressor delivery pressure of this off-premises station mean value of each indoor heat exchanger coil pipe middle portion temperature that is excessive or that running is too high, just can judge that the refrigerant of the off-premises station run is too much, there is bias current, now, open the magnetic valve of the cooling medium liquid pipe of off-duty off-premises station, the reservoir that the refrigerant of the too much off-premises station of refrigerant just can be made to enter off-duty off-premises station from this magnetic valve and outdoor heat exchanger, refrigerant in the off-premises station making the refrigerant that running too much reduces, pressure reduces, alleviate and improve refrigerant bias current.
Adopt above method, the control method preventing the bias current of off-premises station refrigerant when VRF Air Conditioning System of the present invention heats compared with prior art, has the following advantages:
By this control method, effectively can alleviate the situation improving the bias current of VRF Air Conditioning System different off-premises station refrigerant, there is high voltage fault in the off-premises station avoiding refrigerant many, extend unit service life, the off-premises station heating effect simultaneously preventing refrigerant very few is bad, and the several judgement data in this control method, the mean value T of the coil pipe middle portion temperature of indoor set is run as each
mwhether be greater than 60 DEG C, whether compressor delivery pressure value P be greater than 3.75Mpa and judge that judgement data compression machine exit pressure levels P that adjustment process terminates is less than 3.1Mpa, each runs the mean value T of the coil pipe middle portion temperature of indoor set
mbe less than the optimum data that 52 DEG C of grades are all through repetition test screening and checking, above-mentioned a series of data, namely can not too sensitivity cause crossing too early repeatedly to regulate wasting unit energy, also adjustment will be caused to occur high voltage fault not in time due to too blunt.
As improvement, a period of time described in step a refers to 5 ~ 10 minutes, namely compressor operating started to regulate Biased flow phenomenon after 5 ~ 10 minutes, because after this VRF Air Conditioning System runs a period of time, just started to occur Biased flow phenomenon, proved by test, running after 5 ~ 10 minutes regulates relatively accurately, too early regulates, not there will be bias current, need not regulate, the high voltage fault that the words bias current regulated too late causes causes harmful effect.
As improving again, a period of time described in step a refers to 10 minutes, namely compressor operating 10 minutes these time points start to regulate Biased flow phenomenon, proved by repetition test, within 10 minutes, this time point is the most accurate, too early regulates, not there will be bias current, need not regulate, the high voltage fault that the words bias current regulated too late causes causes harmful effect.
As improving further, a period of time described in step f refers to 10 ~ 30 seconds again, namely each regulate be spaced apart 10 ~ 30 seconds, better to the regulating effect of bias current, this is through, and test draws, if regulate too frequent, there is no need; If regulate number of times very little, the dynamics regulated bias current is inadequate.
As also further improving, a period of time described in step e refers to 15 seconds, namely regulates once at interval of 15 seconds, best to the regulating effect of bias current, and this is through, and repetition test draws, if regulate too frequent, there is no need; If regulate number of times very little, the dynamics regulated bias current is inadequate.
Accompanying drawing explanation
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 figure 1, off-premises station, 2, compressor, 3, outdoor heat exchanger, 4, temperature inductor, 5, pressure sensor, 6, magnetic valve, 7, cooling medium liquid pipe, 8, reservoir, 9, refrigerant circulation house steward, 10, indoor set, 11, indoor heat exchanger.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, prevent the control method of off-premises station refrigerant bias current when VRF Air Conditioning System of the present invention heats, its concrete steps are as follows.
A, VRF Air Conditioning System is adjusted to heating mode, and the compressor 2 of part off-premises station 1 is started shooting runs a period of time, and other off-premises station 1 is not started shooting; A period of time in this step refers to 5 ~ 10 minutes, preferably 10 minutes.
B, measured the coil pipe middle portion temperature T of the indoor heat exchanger 11 of this each indoor set 10 by the temperature inductor 4 in the middle part of the coil pipe of the indoor heat exchanger 11 of each indoor set 10 that running
cmand temperature-measuring results is sent to air-conditioning master controller, air-conditioning master controller is by the coil pipe middle portion temperature T of each indoor set 10
cmphase adduction sentences the number of the indoor set 10 of operation, calculates the mean value T that each runs the coil pipe middle portion temperature of indoor set 10
m.
The mean value T of the coil pipe middle portion temperature of c, each operation indoor set 10
mwhether be greater than 60 DEG C, if so, then enter step e; If not, next step is entered.
The compressor 2 exit pressure levels P of this off-premises station 1 measured by the pressure sensor 5 that d, the compressor 2 passing through the off-premises station 1 run export, and result is sent to air-conditioning master controller, judge whether compressor 2 exit pressure levels P is greater than 3.75Mpa, if yes then enter step e, if not, then directly step f is entered.
E, the magnetic valve 6 opened on the cooling medium liquid pipe 7 of the off-premises station 1 do not run, until each runs the mean value T of the coil pipe middle portion temperature of indoor set 10
mbe less than 52 DEG C or the compressor 2 exit pressure levels P of off-premises station 1 that runs is less than 3.1Mpa, then close the magnetic valve 6 on the cooling medium liquid pipe 7 of the off-premises station 1 do not run.This magnetic valve 6 is the magnetic valves 6 on the cooling medium liquid pipe 7 between the reservoir 8 and a refrigerant circulation house steward 9 of VRF Air Conditioning System of off-premises station 1, once open the magnetic valve 6 of the off-premises station 1 do not run, refrigerant just can enter reservoir 8 and the outdoor heat exchanger 3 of the off-premises station 1 do not run through this magnetic valve 6.As the mean value T of the coil pipe middle portion temperature of each indoor set 10 run
mbeing less than 52 DEG C or the compressor 2 exit pressure levels P of off-premises station 1 that runs is less than under these two conditions of 3.1Mpa meet the prerequisite of, and the magnetic valve 6 of just cutting out the off-premises station 1 do not run terminates adjustment.
F, at interval of a period of time, repeat step b ~ e, until shut down; A period of time in this step refers to 10 ~ 30 seconds, preferably 15 seconds.
Claims (1)
1. prevent a control method for off-premises station refrigerant bias current when 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 by the compressor (2) of part off-premises station (1) start operation 5 ~ 10 minutes, and other off-premises station (1) is not started shooting;
B, measured the coil pipe middle portion temperature T of this each indoor set (10) by the temperature inductor (4) in the middle part of the coil pipe of the indoor heat exchanger (11) of each indoor set (10) that running
cmand temperature-measuring results is sent to air-conditioning master controller, air-conditioning master controller is by the coil pipe middle portion temperature T of each indoor set (10)
cmphase adduction, divided by the number of the indoor set (10) run, calculates the mean value T that each runs the coil pipe middle portion temperature of indoor set (10)
m;
The mean value T of the coil pipe middle portion temperature of c, each operation indoor set (10)
mwhether be greater than 60 DEG C, if so, then enter step e; If not, next step is entered;
Compressor (2) the exit pressure levels P of this off-premises station (1) measured by the pressure sensor (5) that d, the compressor (2) passing through the off-premises station (1) run export, and result is sent to air-conditioning master controller, judge whether compressor (2) exit pressure levels P is greater than 3.75Mpa, if yes then enter step e, if not, then directly step f is entered;
E, the magnetic valve (6) opened on the cooling medium liquid pipe (7) of the off-premises station (1) do not run, until each runs the mean value T of the coil pipe middle portion temperature of indoor set (10)
mbe less than 52 DEG C or compressor (2) the exit pressure levels P of off-premises station (1) that runs is less than 3.1Mpa, then close the magnetic valve (6) on the cooling medium liquid pipe (7) of the off-premises station (1) do not run;
F, at interval of 10 ~ 30 seconds, repeat step b ~ e, until shut down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN102914026A CN102914026A (en) | 2013-02-06 |
| CN102914026B true CN102914026B (en) | 2015-06-17 |
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| CN103604193B (en) * | 2013-11-22 | 2016-03-30 | 四川长虹电器股份有限公司 | The outer air conditioner pressure equaliser of a kind of multicell and control method for pressure balance |
| CN105241027B (en) * | 2015-10-30 | 2018-04-06 | 广东美的暖通设备有限公司 | The fault detection method of multiple on-line system and its valve body that exchanges heat |
| CN106403201B (en) * | 2016-11-10 | 2019-03-15 | 广东美的暖通设备有限公司 | The control method and air conditioner of the fresh air machine heat exchanger hydrops of air conditioner |
| CN112066515B (en) * | 2019-06-11 | 2021-11-02 | 青岛海尔空调电子有限公司 | Control method for air conditioning system, air conditioning control system and air conditioning system |
| CN110749039B (en) * | 2019-10-17 | 2021-02-09 | 珠海格力电器股份有限公司 | Control method and device of multi-split system, storage medium and multi-split system |
| CN111059709A (en) * | 2019-12-31 | 2020-04-24 | 海信（山东）空调有限公司 | Control method of air conditioner and air conditioner |
| 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 |
| 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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| EP2369270A1 (en) * | 2010-03-10 | 2011-09-28 | LG Electronics | Air conditioning system and method for calculating amount of filling refrigerants of the same |
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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. |