CN102353116A - Explosion-proof control method of multi-connected air conditioning unit at runtime - Google Patents
Explosion-proof control method of multi-connected air conditioning unit at runtime Download PDFInfo
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- CN102353116A CN102353116A CN2011102113547A CN201110211354A CN102353116A CN 102353116 A CN102353116 A CN 102353116A CN 2011102113547 A CN2011102113547 A CN 2011102113547A CN 201110211354 A CN201110211354 A CN 201110211354A CN 102353116 A CN102353116 A CN 102353116A
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Abstract
The invention discloses an explosion-proof control method of a multi-connected air conditioning unit at runtime. The method comprises the following steps: a, when the unit is turned off, additionally arranging a first air pressure balance tube (3) with a mechanical high-pressure switch valve (8) between an outdoor heat exchanger (1) and a gas-liquid separator (2) of each outdoor unit module, and arranging a high-pressure switch at the outlet end of an oil separator (9); b, running the unit; c, stopping the whole unit by virtue of a master controller of an air conditioner when the pressure value P0 of the outlet end of the oil separator (9) of the outdoor unit module is greater than or equal to a warning value Pb; d, opening the mechanical high-pressure switch valve (8) of the outdoor unit module when the pressure value Pt of the outdoor heat exchanger (1) of the outdoor unit module is greater than or equal to a zero bound pressure value Pa. The control method can be used for avoiding the coil burst of the outdoor heat exchanger.
Description
Technical field
The present invention relates to VRF Air Conditioning System, the explosion prevention controlling process when specifically being the operation of a kind of VRF Air Conditioning System.
Background technology
The VRF Air Conditioning System of prior art comprises a plurality of off-premises station module, a plurality of indoor set modules parallel with one another and two refrigerant circulation house stewards that connect each indoor set module and each off-premises station module; The parallel connection of a plurality of off-premises station modules, the off-premises station module after the parallel connection is communicated with through the indoor set module after two refrigerants circulation house stewards and the parallel connection.
Each off-premises station module comprises compressor, oil eliminator, four-way change-over valve, outdoor heat exchanger (being evaporimeter when being condenser, heating mode during refrigeration mode), throttling arrangement, reservoir 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 through the pipeline of band check valve; Four-way change-over valve second valve port is communicated with outdoor heat exchanger one end; The outdoor heat exchanger other end is communicated with throttling arrangement one end; The throttling arrangement other end is communicated with an end of reservoir, and one among the high-pressure liquid tube of the other end of reservoir through a band stop valve and the two root refrigerants circulation house stewards is communicated with, and another root refrigerant pipe among two root refrigerants circulation house stewards is with the low pressure muffler of stop valve to be communicated with four-way change-over valve the 3rd valve port of each off-premises station module through one; Four-way change-over valve the 4th valve port is connected 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 module comprises indoor heat exchanger (being condenser when being evaporimeter, heating mode during refrigeration mode); One among one end of indoor heat exchanger and the two root refrigerants circulation house stewards is communicated with, and another root refrigerant pipe that the other end of indoor heat exchanger and two root refrigerants circulate among the house stewards is communicated with.
Because a plurality of off-premises station modules of this VRF Air Conditioning System are parallel runnings, after the long-time running, can cause the situation of the refrigerant maldistribution of each module unavoidably; The off-premises station module refrigerant that promptly has is many; What have lacks, and the more off-premises station module of refrigerant is when temperature raises, and its air pressure also can increase severely; When the force value of this off-premises station module surpassed the pressure limit of these each parts of module, explosion will take place in the weakness zone in this module; And the coil pipe of the outdoor heat exchanger of off-premises station module is for the needs of heat exchange, and it is very thin that wall is done, so this position is exactly the weakness zone of explosion extremely easily; In case and the coil pipe explosion of outdoor heat exchanger will be revealed refrigerant, contaminated environment, economic loss is big; Even when explosion, can cause security incident; And, also need outdoor heat exchanger needed for repair and replacement, very trouble.
Summary of the invention
The technical problem that the present invention will solve is, the explosion prevention controlling process when a kind of VRF Air Conditioning System operation of the coil pipe explosion that can avoid outdoor heat exchanger is provided.
Technical solution of the present invention is, the explosion prevention controlling process when a kind of VRF Air Conditioning System operation is provided, and its concrete steps are following:
A, when unit is closed, between the outdoor heat exchanger of each off-premises station module of this unit and gas-liquid separator, add first barometric pipe that is communicated with both, on first barometric pipe, establishing one zero boundary's force value is P
aMechanical high-voltage switch gear valve, establishing a warning value at the port of export of oil eliminator is P
bHigh-voltage switch gear, this high-voltage switch gear is electrically connected with the master controller of air-conditioning;
B, move this unit;
C, high-voltage switch gear are monitored the pressure value P of the port of export of the oil eliminator of each off-premises station module in real time
0In case, P
0More than or equal to warning value P
b, high-voltage switch gear will feed back to the master controller of air-conditioning, and the master controller of air-conditioning is with whole compressor emergency shutdown;
D, mechanical high-voltage switch gear valve are monitored the pressure value P of outdoor heat exchanger of each off-premises station module of this unit in real time
t, in case the pressure value P of the outdoor heat exchanger of off-premises station module is arranged
tMore than or equal to zero boundary's pressure value P
aThe mechanical high-voltage switch gear valve of this off-premises station module is opened; Outdoor heat exchanger is communicated with gas-liquid separator through first barometric pipe, and the refrigerant that accumulates in outdoor heat exchanger, reservoir and the high-pressure liquid tube is diffused in gas-liquid separator, compressor and the oil eliminator through first barometric pipe.
Adopt above method, the explosion prevention controlling process when VRF Air Conditioning System of the present invention is moved compared with prior art has the following advantages:
After the uneven situation of refrigerant appearred in unit long-time running, each off-premises station module, in a single day liquid refrigerants appears in the more off-premises station module of refrigerant evaporated in a large number, caused the pressure value P of the port of export of air pressure sharp increase and oil eliminator
0The warning value P that has surpassed this module mesohigh switch
bThe time; This high-voltage switch gear can feed back to dangerous situation the master controller of air-conditioning; Make whole unit all shut down, the stop valve on the high-pressure liquid tube of each off-premises station module and the low pressure muffler is all closed, if shut down the pressure value P of the outdoor heat exchanger of the more off-premises station module of back refrigerant
tDescend fast and less than zero boundary's pressure value P
a, then control procedure finishes, and outdoor heat exchanger can explosion, and unit safety is if shut down the pressure value P of the outdoor heat exchanger of the more off-premises station module of back refrigerant
tStill higher, even surpassed the zero boundary pressure value P of mechanical high-voltage switch gear valve
a, when having explosion hidden danger, mechanical high-voltage switch gear valve will be opened; Make the refrigerant that accumulates in outdoor heat exchanger, reservoir and the high-pressure liquid tube spread to gas-liquid separator, compressor and oil eliminator through first barometric pipe, like this, the space of ccontaining refrigerant is strengthened; So can effectively reduce the deathtrap is the interior air pressure of outdoor heat exchanger coil pipe of the too much off-premises station module of refrigerant; Thereby avoid the coil pipe explosion, stop secondary refrigerant leakage, the protection environment; Avoid economic loss and security incident, avoid the trouble of maintain and replace outdoor heat exchanger.
As improvement, zero boundary's pressure value P
aBe 4.2MPa ~ 5.5MPa, prove, zero boundary's pressure value P through repetition test
aMore accurate when being in this scope, neither can be too responsive, can be too not blunt yet.
As improving zero boundary's pressure value P again
aBe 4.5MPa, prove, zero boundary's pressure value P through repetition test
aThe most accurate when being in this value, neither can be too responsive, can be too not blunt yet.
As further improvement, warning value P
bBe 4.2MPa ~ 4.5MPa, prove, warning value P through repetition test
bMore accurate when being in this scope, neither can be too responsive, can be too not blunt yet.
As further improving warning value P again
bBe 4.3MPa, prove, warning value P through repetition test
bThe most accurate when being in this value, neither can be too responsive, can be too not blunt yet.
Also be provided with second barometric pipe that is communicated with both between first barometric pipe among the step a and the reservoir; Like this; Refrigerant in reservoir and the high-pressure liquid tube can directly get into first balance pipe and spread to gas-liquid separator along first balance pipe; Get into first balance pipe again and need not the inlet chamber external heat exchanger, so it is pressure decay rate is faster, effective.
Description of drawings
The system schematic of the VRF Air Conditioning System in the explosion prevention controlling process when Fig. 1 is VRF Air Conditioning System of the present invention operation.
The system schematic of the single off-premises station module of the VRF Air Conditioning System in the explosion prevention controlling process when Fig. 2 is VRF Air Conditioning System of the present invention operation.
Shown in the figure 1, outdoor heat exchanger, 2, gas-liquid separator, 3, first barometric pipe, 4, reservoir, 5, high-pressure liquid tube, 6, compressor, 7, second barometric pipe, 8, mechanical high-voltage switch gear valve, 9, oil eliminator.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described further.
Like Fig. 1, shown in Figure 2, the explosion prevention controlling process when VRF Air Conditioning System of the present invention is moved, its concrete steps are following.
A, when unit is closed; Also be provided with second barometric pipe 7 that is communicated with both adding between the outdoor heat exchanger 1 of each off-premises station module of this unit and the gas-liquid separator 2 between first barometric pipe, 3, the first barometric pipes 3 that are communicated with both and the reservoir 4; On first barometric pipe 3, establishing one zero boundary's force value is P
aMechanical high-voltage switch gear valve 8, zero boundary's pressure value P
aBe 4.2MPa ~ 5.5MPa, preferred 4.5MPa; Establishing a warning value at the port of export of oil eliminator 9 is P
bHigh-voltage switch gear, warning value P
bBe 4.2MPa ~ 4.5MPa, preferred 4.3MPa, this high-voltage switch gear is electrically connected with the master controller of air-conditioning.
High-voltage switch gear is located at the port of export of oil eliminator 9, specifically is meant, high-voltage switch gear is located on the pipeline that is communicated with oil eliminator 9 ports of export and four-way change-over valve valve port.High-voltage switch gear of the present invention is that the model that commercially available Changzhou egression Electrical Appliances Co., Ltd produces is the high-voltage switch gear of H2OPS D 4.2/3.3.Mechanical pressure switches valve 8 of the present invention is 6.35 * 6.35 unloader for the commercially available model by the production of Changzhou Electrical Appliances Co., Ltd of normal permanent Sunyu.
B, move this unit.
C, high-voltage switch gear are monitored the pressure value P of the port of export of the oil eliminator 9 of each off-premises station module in real time
0In case, P
0More than or equal to warning value P
b, high-voltage switch gear will feed back to the master controller of air-conditioning, and the master controller of air-conditioning is with whole compressor emergency shutdown.
D, mechanical high-voltage switch gear valve 8 be the pressure value P of the outdoor heat exchanger 1 of each off-premises station module of this unit of monitoring in real time
t, in case the pressure value P of the outdoor heat exchanger 1 of off-premises station module is arranged
tMore than or equal to zero boundary's pressure value P
aThe mechanical high-voltage switch gear valve 8 of this off-premises station module is opened; Outdoor heat exchanger 1 is communicated with gas-liquid separator 2 through first barometric pipe 3, and the refrigerant that accumulates in outdoor heat exchanger 1, reservoir 4 and the high-pressure liquid tube 5 is diffused in gas-liquid separator 2, compressor 6 and the oil eliminator 9 through first barometric pipe 3.
Claims (6)
1. the explosion prevention controlling process a when VRF Air Conditioning System is moved, it is characterized in that: its concrete steps are following:
A, when unit is closed, between the outdoor heat exchanger (1) of each off-premises station module of this unit and gas-liquid separator (2), add first barometric pipe (3) that is communicated with both, on first barometric pipe (3), establishing one zero boundary's force value is P
aMechanical high-voltage switch gear valve (8), establishing a warning value at the port of export of oil eliminator (9) is P
bHigh-voltage switch gear, this high-voltage switch gear is electrically connected with the master controller of air-conditioning;
B, move this unit;
C, high-voltage switch gear are monitored the pressure value P of the port of export of the oil eliminator (9) of each off-premises station module in real time
0In case, P
0More than or equal to warning value P
b, high-voltage switch gear will feed back to the master controller of air-conditioning, and the master controller of air-conditioning is with whole compressor emergency shutdown;
D, mechanical high-voltage switch gear valve (8) are monitored the pressure value P of outdoor heat exchanger (1) of each off-premises station module of this unit in real time
t, in case the pressure value P of the outdoor heat exchanger (1) of off-premises station module is arranged
tMore than or equal to zero boundary's pressure value P
aThe mechanical high-voltage switch gear valve (8) of this off-premises station module is opened; Outdoor heat exchanger (1) is communicated with gas-liquid separator (2) through first barometric pipe (3), and the refrigerant that accumulates in outdoor heat exchanger (1), reservoir (4) and the high-pressure liquid tube (5) is diffused in gas-liquid separator (2), compressor (6) and the oil eliminator (9) through first barometric pipe (3).
2. the explosion prevention controlling process when VRF Air Conditioning System according to claim 1 is moved is characterized in that: zero boundary's pressure value P
aBe 4.2MPa ~ 5.5MPa.
3. the explosion prevention controlling process when VRF Air Conditioning System according to claim 2 is moved is characterized in that: zero boundary's pressure value P
aBe 4.5MPa.
4. the explosion prevention controlling process when VRF Air Conditioning System according to claim 1 is moved is characterized in that: warning value P
bBe 4.2MPa ~ 4.5MPa.
5. the explosion prevention controlling process when VRF Air Conditioning System according to claim 4 is moved is characterized in that: warning value P
bBe 4.3MPa.
6. the explosion prevention controlling process when VRF Air Conditioning System according to claim 1 is moved is characterized in that: also be provided with second barometric pipe (7) that is communicated with both between first barometric pipe (3) among the step a and the reservoir (4).
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| CN 201110211354 CN102353116B (en) | 2011-07-27 | 2011-07-27 | Explosion-proof control method of multi-connected air conditioning unit at runtime |
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|---|---|---|---|
| CN 201110211354 CN102353116B (en) | 2011-07-27 | 2011-07-27 | Explosion-proof control method of multi-connected air conditioning unit at runtime |
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| CN102353116A true CN102353116A (en) | 2012-02-15 |
| CN102353116B CN102353116B (en) | 2013-08-07 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788402A (en) * | 2012-07-26 | 2012-11-21 | 广东美的暖通设备有限公司 | Control method of air conditioning refrigerant circulation system and air conditioning system |
| CN105042701A (en) * | 2015-09-02 | 2015-11-11 | 广东美的制冷设备有限公司 | Split floor type air conditioner and anti-explosion control method and device |
| CN106482242A (en) * | 2015-08-31 | 2017-03-08 | 青岛海尔空调电子有限公司 | Replace shape multi-connected machine off-premises station and its control method |
| CN106482249A (en) * | 2015-08-31 | 2017-03-08 | 青岛海尔空调电子有限公司 | Coolant self adaptation multi-gang air-conditioner off-premises station and its control method |
| CN109882989A (en) * | 2019-02-18 | 2019-06-14 | 广东美的制冷设备有限公司 | Air conditioner and its control method |
| CN107246702B (en) * | 2016-07-22 | 2020-05-05 | 奥克斯空调股份有限公司 | Air conditioner explosion-proof control method |
| CN111503852A (en) * | 2020-04-29 | 2020-08-07 | 广东美的暖通设备有限公司 | Air conditioner and control method and device thereof |
| CN111550394A (en) * | 2020-04-30 | 2020-08-18 | Tcl空调器(中山)有限公司 | Control method and device for compressor running frequency and swimming pool machine system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102788402A (en) * | 2012-07-26 | 2012-11-21 | 广东美的暖通设备有限公司 | Control method of air conditioning refrigerant circulation system and air conditioning system |
| CN102788402B (en) * | 2012-07-26 | 2014-11-26 | 广东美的暖通设备有限公司 | Control method of air conditioning refrigerant circulation system and air conditioning system |
| CN106482242A (en) * | 2015-08-31 | 2017-03-08 | 青岛海尔空调电子有限公司 | Replace shape multi-connected machine off-premises station and its control method |
| CN106482249A (en) * | 2015-08-31 | 2017-03-08 | 青岛海尔空调电子有限公司 | Coolant self adaptation multi-gang air-conditioner off-premises station and its control method |
| CN106482242B (en) * | 2015-08-31 | 2019-10-22 | 青岛海尔空调电子有限公司 | Replaced type multi-connected machine outdoor unit and its control method |
| CN105042701A (en) * | 2015-09-02 | 2015-11-11 | 广东美的制冷设备有限公司 | Split floor type air conditioner and anti-explosion control method and device |
| CN105042701B (en) * | 2015-09-02 | 2017-12-12 | 广东美的制冷设备有限公司 | Split-floor type air conditioner, explosion prevention controlling process and device |
| CN107246702B (en) * | 2016-07-22 | 2020-05-05 | 奥克斯空调股份有限公司 | Air conditioner explosion-proof control method |
| CN109882989A (en) * | 2019-02-18 | 2019-06-14 | 广东美的制冷设备有限公司 | Air conditioner and its control method |
| CN111503852A (en) * | 2020-04-29 | 2020-08-07 | 广东美的暖通设备有限公司 | Air conditioner and control method and device thereof |
| CN111550394A (en) * | 2020-04-30 | 2020-08-18 | Tcl空调器(中山)有限公司 | Control method and device for compressor running frequency and swimming pool machine system |
| CN111550394B (en) * | 2020-04-30 | 2022-05-06 | Tcl空调器(中山)有限公司 | Control method and device for compressor running frequency and swimming pool machine 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. |