CN103216909A - Control method of outdoor fan during heating of variable-frequency multi-connection type air conditioning unit - Google Patents
Control method of outdoor fan during heating of variable-frequency multi-connection type air conditioning unit Download PDFInfo
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Abstract
The invention discloses a control method of an outdoor fan during heating of a variable-frequency multi-connection type air conditioning unit. The control method comprises the following specific steps of a, measuring outdoor environment temperature; b, judging whether the outdoor environment temperature is less than or equal to 18 DEG C or not, if so, starting an outdoor fan (1) in high wind level, continuously running for 30 seconds and entering into step c; and if not, starting the outdoor fan (1) in a medium wind level, continuously running for 30 seconds and then directly entering into step d; c, regulating the wind level in which the outdoor fan (1) runs for once every 30 seconds according to the average value of the condensation temperature; and d, regulating the wind level in which the outdoor fan (1) runs for once every 30 seconds according to the average value of the condensation temperature. According to the control method disclosed by the invention, the frequency of the outdoor fan can run reasonably.
Description
Technical field
The present invention relates to VRF Air Conditioning System, specifically is the control method of a kind of connected formula air-conditioning unit outdoor fan when heating.
Background technology
The VRF Air Conditioning System of prior art comprises 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.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 compressor, oil eliminator, four-way change-over valve, reservoir, throttling arrangement, 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 first valve port of four-way change-over valve, one among four-way change-over valve second valve port 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 an end of reservoir, the other end of reservoir is communicated with an end of throttling arrangement, the other end of throttling arrangement 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.
Organic electronic expansion valve and indoor heat exchanger (being condenser during heating mode) in each indoor set comprises, 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, first valve port of four-way change-over valve is communicated with second valve port, and the 3rd valve port is communicated with the 4th valve port, and promptly 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 first temperature inductor, coil pipe middle part temperature, the i.e. condensation temperature of this temperature inductor energy measurement indoor heat exchanger.Also be provided with second temperature inductor that detects outdoor environment temperature on the off-premises station.The compressor outlet of off-premises station is provided with the 3rd temperature inductor that detects delivery temperature.Three above-mentioned temperature inductors all are electrically connected with the air-conditioning master controller.Off-premises station also is provided with the blower fan of upper and lower two heat exchange, and two blower fans also are electrically connected with the master controller of air-conditioning.Two blower fans can be with five wind shelves operations under the air-conditioning main controller controls, promptly high wind shelves, apoplexy shelves, low wind shelves, ultralow wind shelves and blowing-out shelves.High wind shelves refer to all high wind shelves operation of two blower fans, and the apoplexy shelves refer to two equal apoplexy shelves operations of blower fan, and low wind shelves refer to all low wind shelves operation of two blower fans, and ultralow wind shelves refer to the low wind shelves operation of a blower fan and another blower fan is shut down, and the blowing-out shelves refer to that two blower fans all shut down.
The running frequency of frequency-changeable compressor is along with the height of outdoor environment temperature constantly changes, and the heat exchange area of outdoor heat exchanger is constant, depend on the wind shelves that outdoor fan moves with the heat exchange amount of external environment, if the compressor operating frequency and the outdoor environment temperature of the wind shelves of fan operation and air-conditioning do not match, too high as the wind shelves, then noise is big, fan energy consumption is big, and the coil pipe of indoor set middle part hypertonia, the condensation temperature height, high voltage fault appears easily, can not normally heat, and the wind shelves are low excessively, and then coil pipe middle part pressure is little, condensation temperature is low, can't normally heat equally.
Summary of the invention
The technical problem to be solved in the present invention is, the control method of outdoor fan when providing a kind of frequency that can make outdoor fan to move rational connected formula air-conditioning unit to heat.
Technical solution of the present invention is, the control method of outdoor fan when providing a kind of connected formula air-conditioning unit to heat, and its concrete steps are as follows:
A, second temperature inductor by off-premises station are measured outdoor environment temperature, measurement result are sent to the master controller of air-conditioning;
B, whether judge outdoor environment temperature≤18 ℃, if, then start outdoor fan with high wind shelves, and continuous service 30s, step c entered again; If not, then start outdoor fan with the apoplexy shelves, and continuous service 30s, steps d directly entered again;
C, every 30s, measure the condensation temperature of every indoor set with first temperature inductor of every indoor set of starting shooting, and temperature-measuring results is sent to the master controller of air-conditioning, and calculate this moment the mean value of condensation temperature of whole indoor sets of start, again according to the mean value of this moment condensation temperature, regulates the wind shelves that outdoor fan moves; The adjustment criteria of this step is: the mean value of condensation temperature this moment≤45 ℃, then improve a wind shelves operation outdoor fan, the mean value of condensation temperature this moment＞45 ℃ and＜51 ℃, then keep former wind shelves operation outdoor fan, the mean value of condensation temperature this moment 〉=51 ℃ then reduce a wind shelves operation outdoor fan, in this step, the minimum wind shelves of outdoor fan operation are ultralow wind shelves, and outdoor fan does not allow the blowing-out shelves;
D, every 30s, measure the condensation temperature of every indoor set with first temperature inductor of every indoor set of starting shooting, and temperature-measuring results is sent to the master controller of air-conditioning, and calculate this moment the mean value of condensation temperature of whole indoor sets of start, again according to the mean value of condensation temperature this moment, regulates the wind shelves that outdoor fan moves; The adjustment criteria of this step is: the mean value of condensation temperature this moment≤37 ℃, then improve a wind shelves operation outdoor fan, the mean value of condensation temperature this moment＞37 ℃ and＜48 ℃, then keep former wind shelves operation outdoor fan, the mean value of condensation temperature this moment 〉=48 ℃ and＜56 ℃, then reduce a wind shelves operation outdoor fan;
In the gear process of carrying out every 30s adjusting outdoor fan once, the mean value that the master controller of air-conditioning is also monitored condensation temperature in real time whether 〉=56 ℃, in case find mean value 〉=56 ℃ of condensation temperature this moment, then aperiodic pressure blowing-out machine, mean value until condensation temperature drops to 45 ℃, aperiodic more lasting low wind shelves operation outdoor fan, the mean value until condensation temperature restarts to rise at last, recovers 30s normal regulating once again;
In the gear process of carrying out every 30s adjusting outdoor fan once, the master controller of air-conditioning also monitor in real time the off-premises station that the 3rd temperature inductor measures compressor delivery temperature whether 〉=105 ℃, in case find delivery temperature 〉=105 ℃ this moment, then aperiodic pressure blowing-out machine, drop to 92 ℃ until delivery temperature, aperiodic more lasting low wind shelves operation outdoor fan restarts to rise until delivery temperature at last, recovers 30s normal regulating once again.
This controlling party ratio juris is: during the VRF Air Conditioning System heating operation, condensation temperature can reflect the size of coil pipe middle part pressure of the indoor heat exchanger of indoor set, if strengthen the wind shelves of outdoor fan operation, then heat exchange amount increases, the amount of refrigerant evaporation increases, the coil pipe middle part pressure of condensation temperature and indoor heat exchanger can improve, and the pressure at expulsion of compressor outlet and delivery temperature also can improve; And reduce the wind shelves that outdoor fan moves, and then heat exchange amount reduces, and the amount of refrigerant evaporation reduces, and the pressure and the condensation temperature at the coil pipe middle part of indoor heat exchanger can reduce, and the pressure at expulsion of compressor outlet and delivery temperature also can reduce; And outdoor environment temperature is high more, and the heat exchange effect of air-conditioning is good more, and the wind shelves of outdoor fan operation require low more; So can be according to condensation temperature, outdoor environment temperature, delivery temperature, comprehensive reasonable is regulated the operation wind shelves of outdoor fan.
Adopt above method, the control method of outdoor fan compared with prior art had the following advantages when connected formula air-conditioning unit of the present invention heated:
By this control method, can guarantee that the wind shelves of fan operation and the compressor operating frequency and the outdoor environment temperature of air-conditioning all mate at any time, avoid that the too high noise that causes of wind shelves is big, fan energy consumption is big, coil pipe middle part pressure and Compressor Discharge Pressure are too high, drawback such as high voltage fault occurs, avoid again that the low excessively coil pipe middle part pressure that causes of wind shelves is little, the low excessively situation of compressor exhaust temperature of indoor set condensation temperature and off-premises station, guarantee normally refrigeration.
Description of drawings
Fig. 1 is the systematic schematic diagram of connected formula air-conditioning unit of the present invention control method of outdoor fan when heating.
Shown in the figure 1, outdoor fan, 2, first temperature inductor, 3, compressor, the 4, the 3rd temperature inductor, 5, 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, the control method of outdoor fan when connected formula air-conditioning unit of the present invention heats, its concrete steps are as follows.
A, second temperature inductor by off-premises station are measured outdoor environment temperature, measurement result are sent to the master controller of air-conditioning.
B, whether judge outdoor environment temperature≤18 ℃, if, then start outdoor fan 1 with high wind shelves, and continuous service 30s, step c entered again; If not, then start outdoor fan 1 with the apoplexy shelves, and continuous service 30s, steps d directly entered again.
C, every 30s, the coil pipe middle part temperature of measuring the indoor heat exchanger 5 of every indoor set with first temperature inductor 2 of every indoor set of starting shooting is a condensation temperature, and temperature-measuring results is sent to the master controller of air-conditioning, and calculate this moment the mean value of condensation temperature of whole indoor sets of start, again according to the mean value of this moment condensation temperature, regulates the wind shelves that outdoor fan 1 moves.Briefly, be exactly after outdoor fan 1 starts, begin the operation wind shelves that every 30s regulates an outdoor fan 1.The adjustment criteria of this step is: the mean value of condensation temperature this moment≤45 ℃, then improve a wind shelves operation outdoor fan 1; The mean value of condensation temperature this moment＞45 ℃ and＜51 ℃, then keep former wind shelves operation outdoor fan 1; The mean value of condensation temperature this moment 〉=51 ℃ then reduce a wind shelves operation outdoor fan 1.In this step, the minimum wind shelves of outdoor fan 1 operation are ultralow wind shelves, outdoor fan 1 does not allow the blowing-out shelves, specifically, the lowest gear of outdoor fan 1 operation is exactly ultralow wind shelves, even outdoor fan 1 has just satisfied the condition that reduces wind shelves in operation of ultralow wind shelves and condensation temperature mean value this moment this moment, be 54 ℃ as the mean value of this moment condensation temperature, but still need to keep ultralow wind shelves operation.
D, every 30s, measure the condensation temperature of every indoor set with first temperature inductor 2 of every indoor set of starting shooting, and temperature-measuring results is sent to the master controller of air-conditioning, and calculate this moment the mean value of condensation temperature of whole indoor sets of start, again according to the mean value of condensation temperature this moment, regulates the wind shelves that outdoor fan 1 moves.The adjustment criteria of this step is: the mean value of condensation temperature this moment≤37 ℃, then improve a wind shelves operation outdoor fan 1, the mean value of condensation temperature this moment＞37 ℃ and＜48 ℃, then keep former wind shelves operation outdoor fan 1, the mean value of condensation temperature this moment 〉=48 ℃ and＜56 ℃, then reduce a wind shelves operation outdoor fan 1.More than every 30s adjustment process once, belong to the normal regulating process, in case following two kinds of situations occur, will withdraw from the normal regulating process.
The situation that first kind of needs withdraw from the normal regulating process is, in the gear process of carrying out every 30s adjusting outdoor fan 1 once, the mean value that the master controller of air-conditioning is also monitored condensation temperature in real time whether 〉=56 ℃, in case find mean value 〉=56 ℃ of condensation temperature this moment, then aperiodic pressure blowing-out machine, that is to say, in unlimited time the outdoor fan 1 that makes continues the blowing-out shelves, mean value until condensation temperature drops to 45 ℃, aperiodic more lasting low wind shelves operation outdoor fan 1, mean value until condensation temperature restarts to rise at last, recovers 30s normal regulating once again, promptly is returned to every 30s normal regulating process once again.
The situation that second kind of needs withdraw from the normal regulating process is, in the gear process of carrying out every 30s adjusting outdoor fan 1 once, the master controller of air-conditioning also monitor in real time the off-premises station that the 3rd temperature inductor 4 measures compressor 3 delivery temperature whether 〉=105 ℃, in case find delivery temperature 〉=105 ℃ this moment, then aperiodic pressure blowing-out machine, drop to 92 ℃ until delivery temperature, aperiodic more lasting low wind shelves operation outdoor fan 1, restart to rise until delivery temperature at last, recover 30s normal regulating once again, promptly be returned to every 30s normal regulating process once again.
Claims (1)
1. the control method of outdoor fan when a connected formula air-conditioning unit heats, it is characterized in that: its concrete steps are as follows:
A, second temperature inductor by off-premises station are measured outdoor environment temperature, measurement result are sent to the master controller of air-conditioning;
B, whether judge outdoor environment temperature≤18 ℃, if, then start outdoor fan (1) with high wind shelves, and continuous service 30s, step c entered again; If not, then start outdoor fan (1) with the apoplexy shelves, and continuous service 30s, steps d directly entered again;
C, every 30s, measure the condensation temperature of every indoor set with first temperature inductor (2) of every indoor set of starting shooting, and temperature-measuring results is sent to the master controller of air-conditioning, and calculate this moment the mean value of condensation temperature of whole indoor sets of start, the mean value of basis condensation temperature is this moment regulated the wind shelves that an outdoor fan (1) moves again; The adjustment criteria of this step is: the mean value of condensation temperature this moment≤45 ℃, then improve a wind shelves operation outdoor fan (1), the mean value of condensation temperature this moment＞45 ℃ and＜51 ℃, then keep former wind shelves operation outdoor fan (1), the mean value of condensation temperature this moment 〉=51 ℃ then reduce a wind shelves operation outdoor fan (1), in this step, the minimum wind shelves of outdoor fan (1) operation are ultralow wind shelves, and outdoor fan (1) does not allow the blowing-out shelves;
D, every 30s, measure the condensation temperature of every indoor set with first temperature inductor (2) of every indoor set of starting shooting, and temperature-measuring results is sent to the master controller of air-conditioning, and calculate this moment the mean value of condensation temperature of whole indoor sets of start, according to the mean value of condensation temperature this moment, regulates the wind shelves that an outdoor fan (1) moves again; The adjustment criteria of this step is: the mean value of condensation temperature this moment≤37 ℃, then improve a wind shelves operation outdoor fan (1), the mean value of condensation temperature this moment＞37 ℃ and＜48 ℃, then keep former wind shelves operation outdoor fan (1), the mean value of condensation temperature this moment 〉=48 ℃ and＜56 ℃, then reduce a wind shelves operation outdoor fan (1);
In the gear process of carrying out every 30s adjusting outdoor fan (1) once, the mean value that the master controller of air-conditioning is also monitored condensation temperature in real time whether 〉=56 ℃, in case find mean value 〉=56 ℃ of condensation temperature this moment, then aperiodic pressure blowing-out machine, mean value until condensation temperature drops to 45 ℃, aperiodic more lasting low wind shelves operation outdoor fan (1), the mean value until condensation temperature restarts to rise at last, recovers 30s normal regulating once again;
In the gear process of carrying out every 30s adjusting outdoor fan (1) once, the master controller of air-conditioning also monitor in real time the off-premises station that the 3rd temperature inductor (4) measures compressor (3) delivery temperature whether 〉=105 ℃, in case find delivery temperature 〉=105 ℃ this moment, then aperiodic pressure blowing-out machine, drop to 92 ℃ until delivery temperature, aperiodic more lasting low wind shelves operation outdoor fan (1), restart to rise until delivery temperature at last, recover 30s normal regulating once again.
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| CN105276914A (en) * | 2015-04-24 | 2016-01-27 | Tcl智能科技（合肥）有限公司 | Control method for frequency conversion compressor and refrigerator |
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| WO2018054196A1 (en) * | 2016-09-21 | 2018-03-29 | 广东美的暖通设备有限公司 | Multi-connected system and control method therefor |
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| CN107957117A (en) * | 2017-10-31 | 2018-04-24 | 青岛海尔空调器有限总公司 | A kind of control method and device of outdoor fan of air-conditioner rotating speed |
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| CN107957117B (en) * | 2017-10-31 | 2020-04-14 | 青岛海尔空调器有限总公司 | Method and device for controlling rotating speed of outdoor fan of air conditioner |
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| CN111765678A (en) * | 2020-06-28 | 2020-10-13 | 广东华天成新能源科技股份有限公司 | Intelligent control scheme of heat pump system |
| CN112161390A (en) * | 2020-09-15 | 2021-01-01 | 珠海格力电器股份有限公司 | Electronic expansion valve control method and device and air conditioner |
| CN114234406A (en) * | 2021-12-22 | 2022-03-25 | 四川长虹空调有限公司 | Air conditioner refrigeration control method |
| CN115200184A (en) * | 2022-07-11 | 2022-10-18 | 上海科泰运输制冷设备有限公司 | Frequency control method, controller and storage medium of condensing fan |
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