CN102767886B - Method for judging proper amount of refrigerants for multi-united air conditioning unit - Google Patents
Method for judging proper amount of refrigerants for multi-united air conditioning unit Download PDFInfo
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- CN102767886B CN102767886B CN201210262338.5A CN201210262338A CN102767886B CN 102767886 B CN102767886 B CN 102767886B CN 201210262338 A CN201210262338 A CN 201210262338A CN 102767886 B CN102767886 B CN 102767886B
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Abstract
The invention discloses a method for judging proper amount of refrigerants for a multi-united air conditioning unit, comprising the following steps of: after adjusting a four-way reversing valve (1) of the unit to a refrigeration mode and starting and running a compressor (2) of an outdoor unit for a period of time t, measuring an outdoor environment temperature T, the frequency f of the running compressor (2) and the exhaust pressure P0 of the compressor (2); and then comparing the exhaust pressure P0 of the compressor (2) with the standard region of an exhaust pressure corresponding to the outdoor environment temperature T and the frequency f of the running compressor (2), if the exhaust pressure P0 of the compressor (2) is positioned in the standard region, judging that the amount of the refrigerants is proper, if the exhaust pressure P0 of the compressor (2) is greater than the maximum of the standard region, judging that the amount of the refrigerants is too much, and if the exhaust pressure P0 of the compressor (2) is less than the minimum of the standard region, judging that the amount of the refrigerants is insufficient. The method is accurate, visualized and convenient.
Description
Technical field
The present invention relates to VRF Air Conditioning System, is specifically a kind of whether appropriate method of refrigerant that judges VRF Air Conditioning System.
Background technology
The VRF Air Conditioning System of prior art comprises one or more off-premises stations, multiple indoor set parallel with one another and connects two refrigerant circulation house stewards of each indoor set and each off-premises station.If off-premises station is one, this off-premises station is communicated with the multiple indoor sets after parallel connection by two refrigerant circulation house stewards; If off-premises station is multiple, multiple off-premises station parallel connections, the off-premises station after parallel connection is communicated with the indoor set after parallel connection by two refrigerant circulation house stewards.
Each off-premises station comprises compressor, oil eliminator, four-way change-over valve, outdoor heat exchanger (being condenser when refrigeration 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, 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 in two refrigerants circulation house stewards one, and another root refrigerant pipe in two refrigerants circulation house stewards 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 connected with one end of gas-liquid separator, and the other end of gas-liquid separator is communicated with suction port of compressor.When refrigeration mode, the first valve port of four-way change-over valve is communicated with the second valve port, the 3rd valve port is communicated with the 4th valve port, and refrigerant is along compressor, outdoor heat exchanger, indoor heat exchanger, this route circulation of compressor, and the exit of compressor is provided with the pressure at expulsion P that measures compressor
0high pressure sensor, high pressure sensor is electrically connected with the master controller of air-conditioning, the master controller of air-conditioning is also electrically connected with the temperature sensor of compressor and measurement outdoor temperature, like this, on the panel of air-conditioning master controller, can show the compressor operating frequency f of air-conditioning, the pressure at expulsion P of compressor
0with outdoor environment temperature T.
Each indoor set comprises interior organic electronic expansion valve and indoor heat exchanger (being evaporimeter when refrigeration mode), one end of indoor heat exchanger is communicated with one end of interior organic electronic expansion valve, the other end of interior organic electronic expansion valve is communicated with in two refrigerants circulation house stewards one, and the other end of indoor heat exchanger is communicated with another root refrigerant pipe that two refrigerants circulate in house stewards.
When manufacturing in factory, VRF Air Conditioning System can add refrigerant according to designing requirement, but the amount of the refrigerant this moment adding is an ideal value of choosing according to designing requirement, after this VRF Air Conditioning System is arranged in concrete working environment, client may be according to specific needs, add or change the number of units of indoor set in this unit or off-premises station, or, due to each indoor set in working environment and the path of the different even each refrigerant pipes of height fall of off-premises station installation, length changes, capital makes the coolant quantity adding in factory not mate with the needed coolant quantity of this air-conditioning unit actual motion, once refrigerant is more, just easy liquid hammer compressor, and refrigerant is less, cooling or heating effect is just bad, and can strengthen compressor, the load of the parts such as heat exchanger, wearing and tearing, shorten the service life of whole unit.
Summary of the invention
The technical problem to be solved in the present invention is that a kind of whether appropriate method of refrigerant that judges accurately, intuitively, easily VRF Air Conditioning System is provided.
Technical solution of the present invention is, a kind of whether appropriate method of refrigerant that judges VRF Air Conditioning System is provided, its concrete steps are as follows: the four-way change-over valve of unit is adjusted into refrigeration mode and by after compressor start operation a period of time t of off-premises station, measures outdoor environment temperature T, the frequency f of compressor and the pressure at expulsion P of this compressor that move
0, then by the pressure at expulsion P of this compressor
0and compare between the standard regions of the pressure at expulsion corresponding with the frequency f of outdoor environment temperature T and the compressor that moving, if the pressure at expulsion P of this compressor
0be positioned between this standard regions, refrigerant is appropriate, if the pressure at expulsion P of this compressor
0be greater than the maximum between this standard regions, coolant quantity is too much, if the pressure at expulsion P of this compressor
0be less than the minimum of a value between this standard regions, coolant quantity deficiency.
A period of time t refers to 3 ~ 5 minutes, preferably 3 minutes.
As shown in the table between the standard regions of the pressure at expulsion corresponding with the frequency f of outdoor environment temperature T and the compressor that moving:
Wherein, T is outdoor environment temperature, and f is the frequency of the compressor that moving.
Adopt above method, the present invention judges the whether appropriate method of the refrigerant of VRF Air Conditioning System compared with prior art, has the following advantages:
This concrete numerical value in judging between the standard regions of pressure at expulsion corresponding to the frequency f with outdoor environment temperature T and the compressor that moving in the whether appropriate method of the refrigerant of VRF Air Conditioning System, after inventor's long term test, to sum up the data of summarizing, from the panel of the master controller of air-conditioning, read outdoor environment temperature T, the frequency f of compressor and the pressure at expulsion P of this compressor that move
0after these three concrete numerical value, bring the frequency f of outdoor environment temperature T and the compressor that moving into form, find between the standard regions of corresponding pressure at expulsion, use pressure at expulsion P
0with between the standard regions of corresponding pressure at expulsion, compare, just can learn fast, intuitively, accurately, easily that whether the refrigerant of this VRF Air Conditioning System is appropriate, as taken at most refrigerant away, add at least, therefore can effectively avoid that refrigerant is very few causes the drawbacks such as the parts such as refrigeration is not good, compressor operation excess load, service life be short, can also prevent refrigerant too much and liquid hammer compressor.
Brief description of the drawings
Fig. 1 is the systematic schematic diagram that the present invention judges the whether appropriate method of the refrigerant of VRF Air Conditioning System.
Shown in figure 1, four-way change-over valve, 2, compressor.
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, the present invention judges the whether appropriate method of refrigerant of VRF Air Conditioning System, its concrete steps are as follows: the four-way change-over valve of unit 1 is adjusted into refrigeration mode and the compressor of off-premises station 2 is started shooting after operation a period of time t, a period of time t refers to 3 ~ 5 minutes, preferably 3 minutes.Measure outdoor environment temperature T, the frequency f of compressor 2 and the pressure at expulsion P of this compressor 2 that move
0, then by the pressure at expulsion P of this compressor 2
0and compare between the standard regions of the pressure at expulsion corresponding with the frequency f of outdoor environment temperature T and the compressor 2 that moving, if the pressure at expulsion P of this compressor 2
0be positioned between this standard regions, refrigerant is appropriate, if the pressure at expulsion P of this compressor 2
0be greater than the maximum between this standard regions, coolant quantity is too much, if the pressure at expulsion P of this compressor 2
0be less than the minimum of a value between this standard regions, coolant quantity deficiency.
As shown in the table between the standard regions of the pressure at expulsion corresponding with the frequency f of outdoor environment temperature T and the compressor 2 that moving:
Wherein, T is outdoor environment temperature, and f is the frequency of the compressor 2 that moving.
The blank lattice in four, the lower left corner of this form represent this outdoor environment temperature T and the situation corresponding to frequency f of the compressor 2 that moving is impossible exist.As blank lattice in the lower left corner, implication is for being less than 20 while spending as outdoor environment temperature T, and the running frequency f of compressor can not reach 70Hz to 80Hz.
Illustrate, record and the outdoor temperature T that shows on the panel of master controller is 33 DEG C by temperature sensor, the frequency f of the compressor moving 2 showing on the panel of master controller is 62Hz and high pressure sensor records and the pressure at expulsion P of this compressor 2 of showing on the panel of master controller
0for 35.5MPa, be that 33 DEG C, the frequency f of compressor 2 are that to bring between the standard regions that form obtains corresponding pressure at expulsion be (35.2MPa to 62Hz by outdoor temperature T, 36MPa], between this standard regions, be { p|35.2 < p≤36}, that is to say, pressure criteria value is greater than 35.2MPa and is less than or equal to 36MPa, the pressure at expulsion P of this compressor 2
0for 35.5MPa, belong to this interval, the refrigerant of this unit is appropriate.
Such as the outdoor temperature T of this unit is 37 DEG C, the frequency f of the compressor 2 moving is 75Hz, the pressure at expulsion P of this compressor 2 again
0for 42MPa, correspondence is tabled look-up, and is (37.5MPa between the standard regions of pressure at expulsion, 38MPa], between this standard regions, be that { p|37.5 < p≤38}, that is to say, pressure criteria value is greater than 37.5MPa and is less than or equal to 38MPa, and the pressure at expulsion P of this compressor 2
0for 42MPa, be greater than this interval maximum 38MPa, therefore the refrigerant of this unit is too much, should extract refrigerant from unit.
Also, such as the outdoor temperature T of this unit is 23 DEG C, the frequency f of the compressor 2 moving is 55Hz, the pressure at expulsion P of this compressor 2
0for 21MPa, correspondence is tabled look-up, and is (24.9MPa between the standard regions of pressure at expulsion, 28.3MPa], between this standard regions, be that { p|24.9 < p≤28.3}, that is to say, pressure criteria value is greater than 24.9MPa and is less than or equal to 28.3MPa, and the pressure at expulsion P of this compressor 2
0for 21MPa, be less than this interval minimum of a value 24.9MPa, therefore the refrigerant of this unit is very few, should add refrigerant to unit.
Claims (3)
1. one kind judges the whether appropriate method of refrigerant of VRF Air Conditioning System, it is characterized in that: the four-way change-over valve of unit (1) is adjusted into refrigeration mode and by after the compressor of off-premises station (2) start operation a period of time t, measures outdoor environment temperature T, the frequency f of compressor (2) and the pressure at expulsion P of this compressor (2) that move
0, then by the pressure at expulsion P of this compressor (2)
0and compare between the standard regions of the pressure at expulsion corresponding with the frequency f of outdoor environment temperature T and the compressor (2) that moving, if the pressure at expulsion P of this compressor (2)
0be positioned between this standard regions, refrigerant is appropriate, if the pressure at expulsion P of this compressor (2)
0be greater than the maximum between this standard regions, coolant quantity is too much, if the pressure at expulsion P of this compressor (2)
0be less than the minimum of a value between this standard regions, coolant quantity deficiency;
As shown in the table between the standard regions of the pressure at expulsion corresponding with the frequency f of outdoor environment temperature T and the compressor (2) that moving:
Wherein, T is outdoor environment temperature, and f is the frequency of the compressor (2) that moving.
2. the whether appropriate method of refrigerant that judges VRF Air Conditioning System according to claim 1, is characterized in that: a period of time t refers to 3～5 minutes.
3. the whether appropriate method of refrigerant that judges VRF Air Conditioning System according to claim 2, is characterized in that: a period of time t refers to 3 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210262338.5A CN102767886B (en) | 2012-07-26 | 2012-07-26 | Method for judging proper amount of refrigerants for multi-united air conditioning unit |
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| CN201210262338.5A CN102767886B (en) | 2012-07-26 | 2012-07-26 | Method for judging proper amount of refrigerants for multi-united air conditioning unit |
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| CN102767886B true CN102767886B (en) | 2014-12-03 |
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| CN103968494B (en) * | 2013-01-25 | 2016-08-03 | 珠海格力电器股份有限公司 | Control method of air conditioning system and air conditioning system |
| CN103235225B (en) * | 2013-04-25 | 2016-04-06 | 青岛海尔空调电子有限公司 | A kind of method and device detecting convertible frequency air-conditioner and lack fluorine running |
| CN104729023B (en) * | 2015-04-09 | 2017-10-17 | 宁波奥克斯电气股份有限公司 | The dynamic equilibrium control method of refrigerant when VRF Air Conditioning System is heated |
| CN105042807B (en) * | 2015-09-07 | 2017-11-28 | 珠海格力电器股份有限公司 | Method and device for detecting running state of variable frequency air conditioner |
| CN105953354B (en) * | 2016-04-25 | 2018-09-07 | 广东美的暖通设备有限公司 | Multi-line system and its control method |
| CN106931604B (en) * | 2017-03-30 | 2019-07-30 | 四川长虹电器股份有限公司 | The anti-refrigerant of VRF air conditioning accumulates processing method |
| CN107339835A (en) * | 2017-07-25 | 2017-11-10 | 珠海格力电器股份有限公司 | Refrigerant quantity monitoring method and device |
| CN107940844B (en) * | 2017-11-22 | 2019-09-20 | 珠海格力电器股份有限公司 | Method for judging liquid in suction gas of compressor and control method of refrigerant circulating system |
| CN109269010A (en) * | 2018-09-30 | 2019-01-25 | 珠海格力电器股份有限公司 | Fluorine deficiency detection control method, device and system for temperature regulation equipment and air conditioner |
| CN109883011B (en) * | 2018-12-24 | 2021-02-19 | 珠海格力电器股份有限公司 | Refrigerant adjusting method and device and air conditioning system |
| CN110332743A (en) * | 2019-07-15 | 2019-10-15 | 珠海格力电器股份有限公司 | Cooling machine and refrigerant detection method, device and system thereof |
| CN111023437A (en) * | 2019-12-26 | 2020-04-17 | 海信（广东）空调有限公司 | Refrigerant leakage detection method of air conditioner and air conditioner |
| CN111256253A (en) * | 2020-01-19 | 2020-06-09 | 珠海格力电器股份有限公司 | Refrigerant storage amount detection method, refrigerant storage amount detection device and air conditioner |
| CN111473466B (en) * | 2020-04-21 | 2022-03-22 | 宁波奥克斯电气股份有限公司 | Frequency control method and air conditioner |
| CN113959046B (en) * | 2021-09-08 | 2023-04-28 | 青岛海尔空调电子有限公司 | Method for determining refrigerant filling amount for air conditioning system |
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| JP4682489B2 (en) * | 2001-09-17 | 2011-05-11 | 株式会社デンソー | Air conditioner for vehicles |
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| US5172563A (en) * | 1990-06-20 | 1992-12-22 | Zexel Corporation | Apparatus for controlling automobile air-conditioner |
| CN1573261A (en) * | 2003-06-20 | 2005-02-02 | 三电有限公司 | Refrigeration cycle control unit |
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| CN102767886A (en) | 2012-11-07 |
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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. |