CN103557578A - Protection method for lack of fluorine of air-cooled module type cold hot water unit - Google Patents
Protection method for lack of fluorine of air-cooled module type cold hot water unit Download PDFInfo
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- CN103557578A CN103557578A CN201310537943.3A CN201310537943A CN103557578A CN 103557578 A CN103557578 A CN 103557578A CN 201310537943 A CN201310537943 A CN 201310537943A CN 103557578 A CN103557578 A CN 103557578A
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Abstract
The invention provides a protection method for lack of fluorine of an air-cooled module type cold hot water unit. When the unit is in a refrigeration or dehumidification mode, after a compressor is started, whether running time reaches t is judged, if so, Td, Tcm, Tei, Ts and EEV are measured, whether the conditions that Td minus Tcm is greater than or equal to a1, Ts minus Tei is greater than or equal to b1, and EEV is greater than or equal to c1 are simultaneously met is judged, if so, the unit is stopped, and otherwise, the unit continuously operates; when the unit is in a heating mode, after the compressor is started, whether the running time reaches t and whether defrosting is performed are judged, if defrosting is performed and the running time does not reach t, then timing is performed again after defrosting; whether the running time reaches t is judged, if the running time reaches t, Td, Tde, Tei, Ts and EEV are measured, and whether the conditions that Td minus Tei is greater than or equal to a2, Ts minus Tde is greater than or equal to b2, and EEV is greater than or equal to c2 are simultaneously met is judged, if so, the unit is stopped, and otherwise, the unit continuously operates. The method is simple and reliable.
Description
Technical field
The present invention relates to the guard method that a kind of air-conditioning unit lacks fluorine, be specifically related to the guard method that a kind of air-cooled modular cold and hot water unit lacks fluorine.
Background technology
Air-cooled modular cold and hot water unit is because solder joint is more, ubiquity refrigrant leakage problem when accumulating, operation, holding state.With regard to current generator protection measure, only have when a large amount of refrigrant leakage occurs unit and (generally freeze more than 40%, heat more than 60%), unit just there will be low-voltage variation or delivery temperature to protect and shut down.And before not reaching this leakage rate, unit will move for a long time at scarce fluorine state, cause compressor because motor overheating or insufficient lubrication damage, had a strong impact on the service life of compressor.
Conventional air-conditioner generally lacks fluorine protection according to indoor set coil temperature.Publication number is the determination methods that CN101566517A patent discloses a kind of refrigerant leakage of air-conditioner, according to the difference of indoor coil pipe and indoor environment temperature, lacks fluorine protection.But for air-cooled modular cold and hot water unit, without indoor set.Therefore these class methods cannot be applied to the scarce fluorine protection of air-cooled modular cold and hot water unit.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of simple, scarce fluorine guard method of air-cooled modular cold and hot water unit reliably.
The technical solution adopted in the present invention is:
Air-cooled modular cold and hot water unit lacks a guard method for fluorine, wherein:
When refrigeration or dehumidification mode, comprise the following steps:
(1), after compressor start, start timing;
(2) judge and whether reach t minute running time, if it is measure temperature T cm in delivery temperature Td, outdoor finned heat exchanger dish, water-side heat liquid pipe temperature T ei, suction temperature Ts and electronic expansion valve opening EEV, if otherwise continue timing;
(3) calculate Td-Tcm, Ts-Tei, whether following three conditions of judgement meet simultaneously: Td-Tcm >=a1, Ts-Tei >=b1, EEV >=c1, if it is compressor emergency shutdown report fault, if otherwise unit continues operation.
During heating mode, comprise the following steps:
(1), after compressor start, start timing;
(2) judge whether reach t minute running time, detect unit simultaneously and whether entered defrosting, if detect unit, be to have entered defrosting not reach t minute running time, when defrosting finishes or defrosting complete after compressor while again starting, timing zero clearing reclocking, judge and whether reach t minute running time, if it is measure delivery temperature Td, the outdoor finned heat exchanger temperature T de that tries to get to the heart of a matter, water-side heat liquid pipe temperature T ei, suction temperature Ts and electronic expansion valve opening EEV, if otherwise continue timing, if detection unit enters defrosting, be not to reach t minute running time, measures delivery temperature Td, the outdoor finned heat exchanger temperature T de that tries to get to the heart of a matter, water-side heat liquid pipe temperature T ei, suction temperature Ts and electronic expansion valve opening EEV, if detection unit enters defrosting, do not reach t minute running time, continue timing,
(3) calculate Td-Tei, Ts-Tde, whether following three conditions of judgement meet simultaneously: Td-Tei >=a2, Ts-Tde >=b2, EEV >=c2, if it is compressor emergency shutdown report fault, if otherwise unit continues operation.
T described in the present invention minute is 10～15 minutes.
A1 described in the present invention is 45～50 ℃; Described b1 is 7～10 ℃; Described c1 is 470.
A2 described in the present invention is 55～60 ℃; Described b2 is 10～15 ℃; Described c2 is 470.
Air-cooled modular cold and hot water unit of the present invention lacks the guard method of fluorine, compared with prior art, have the following advantages: the method has solved air-cooled modular cold and hot water unit because judging whether cold-producing medium leaks and the problem of scarce fluorine protection according to the difference of indoor set indoor coil pipe and indoor environment temperature without indoor set; The method just can not shut down and lack fluorine protection when low-voltage variation or delivery temperature protection appear in unit, the faults such as compressor damage of having avoided unit to cause because of long-time scarce fluorine state operation; The method can adopt conventionally try to get to the heart of a matter temperature sensor, water-side heat liquid pipe temperature sensor of temperature sensor, outdoor finned heat exchanger in the exhaust gas temperature sensor, suction temperature sensor, outdoor finned heat exchanger dish of configuration of air-cooled modular cold and hot water unit, do not need to increase in addition temperature sensor, thereby simple and easy to do, cost is lower.In addition, the method, except adopting temperature difference judgement, has also been introduced the judgement of electronic expansion valve opening, has improved the accuracy of judgement, has reduced probability of miscarriage of justice.
Accompanying drawing explanation
Fig. 1 is the systematic schematic diagram of air-cooled modular cold and hot water unit of the present invention;
Fig. 2 is the flow chart of guard method under refrigeration or dehumidification mode that the embodiment of the present invention 1 air-cooled modular cold and hot water unit lacks fluorine;
Fig. 3 is the flow chart under heating mode that the embodiment of the present invention 2 air-cooled modular cold and hot water units lack the guard method of fluorine.
Wherein: 1, water-side heat; 2, cross valve; 3, outdoor finned heat exchanger; 4, temperature sensor in dish; 5, the temperature sensor of trying to get to the heart of a matter; 6, exhaust gas temperature sensor; 7, compressor; 8, suction temperature sensor; 9, gas-liquid separator; 10, filter; 11, electric expansion valve; 12, liquid pipe temperature sensor.
The specific embodiment
Below in conjunction with embodiment, the present invention is further described in detail, but the present invention is not only confined to following specific embodiment.
Embodiment 1:
The scarce fluorine guard method of air-cooled modular cold and hot water unit under refrigeration or dehumidification mode, comprises the following steps:
When user sends by line control machine after refrigeration start-up command, compressor 7 starts, and starts timing.
Judge and whether reach 15 minutes running time.If reach 15 minutes, record on the delivery temperature Td, outdoor finned heat exchanger 3 of exhaust gas temperature sensor 6 in dish liquid pipe temperature T ei, the suction temperature Ts of suction temperature sensor 8 and the aperture EEV of electric expansion valve 11 of the liquid pipe temperature sensor 12 on temperature T cm, water-side heat 1 side liquid pipe in the dish of temperature sensor 4, and calculate Td-Tcm, Ts-Tei; If do not reach 15 minutes, continue timing.
Whether following three conditions of judgement meet simultaneously: Td-Tcm >=50 ℃, Ts-Tei >=10 ℃, EEV >=470 ℃.If met, compressor emergency shutdown report fault; If do not met, unit continues operation.
Embodiment 2:
The scarce fluorine guard method of air-cooled modular cold and hot water unit under heating mode, comprises the following steps:
When user sends by line control machine after refrigeration start-up command, compressor 7 starts, and starts timing.
From timing, start within 15 minutes these time periods, detect unit and whether entered defrosting.
If entered defrosting, when defrosting finishes or defrosting complete after compressor 7 while restarting, timing zero clearing reclocking.Judge and whether reach 15 minutes running time.If reach 15 minutes, record on the delivery temperature Td, outdoor finned heat exchanger 3 of exhaust gas temperature sensor 6, try to get to the heart of a matter the temperature T de that tries to get to the heart of a matter of temperature sensor 5, liquid pipe temperature T ei, the suction temperature Ts of suction temperature sensor 8 and the aperture EEV of electric expansion valve 11 of the liquid pipe temperature sensor 12 on water-side heat 1 side liquid pipe, and calculate Td-Tei, Ts-Tde.If do not reach 15 minutes, continue timing.Then whether following three conditions of judgement meet simultaneously: Td-Tei >=60 ℃, Ts-Tde >=10 ℃, EEV >=470.If met, compressor emergency shutdown report fault; If do not met, unit continues operation.
If do not enter defrosting always, judge whether reach 15 minutes running time.If reach 15 minutes, record on the delivery temperature Td, outdoor finned heat exchanger 3 of exhaust gas temperature sensor 6, try to get to the heart of a matter the temperature T de that tries to get to the heart of a matter of temperature sensor 5, liquid pipe temperature T ei, the suction temperature Ts of suction temperature sensor 8 and the aperture EEV of electric expansion valve 11 of the liquid pipe temperature sensor 12 on water-side heat 1 side liquid pipe, and calculate Td-Tei, Ts-Tde.If do not reach 15 minutes, continue timing.Then whether following three conditions of judgement meet simultaneously: Td-Tei >=60 ℃, Ts-Tde >=10 ℃, EEV >=470.If met, compressor emergency shutdown report fault; If do not met, unit continues operation.
The above embodiment of the present invention is to explanation of the present invention and can not be for limiting the present invention, and the implication suitable with claims of the present invention and any change in scope, all should think to be included in the scope of claims.
Claims (4)
1. air-cooled modular cold and hot water unit lacks a guard method for fluorine, it is characterized in that:
When refrigeration or dehumidification mode, comprise the following steps:
(1), after compressor start, start timing,
(2) judge and whether reach t minute running time, if it is measure temperature T cm in delivery temperature Td, outdoor finned heat exchanger dish, water-side heat liquid pipe temperature T ei, suction temperature Ts and electronic expansion valve opening EEV, if otherwise continue timing,
(3) calculate Td-Tcm, Ts-Tei, whether following three conditions of judgement meet simultaneously: Td-Tcm >=a1, Ts-Tei >=b1, EEV >=c1, and if it is compressor emergency shutdown report fault, if otherwise unit continues operation;
During heating mode, comprise the following steps:
(1), after compressor start, start timing,
(2) judge whether reach t minute running time, detect unit simultaneously and whether entered defrosting, if detect unit, be to have entered defrosting not reach t minute running time, when defrosting finishes or defrosting complete after compressor while again starting, timing zero clearing reclocking, judge and whether reach t minute running time, if it is measure delivery temperature Td, the outdoor finned heat exchanger temperature T de that tries to get to the heart of a matter, water-side heat liquid pipe temperature T ei, suction temperature Ts and electronic expansion valve opening EEV, if otherwise continue timing, if detection unit enters defrosting, be not to reach t minute running time, measures delivery temperature Td, the outdoor finned heat exchanger temperature T de that tries to get to the heart of a matter, water-side heat liquid pipe temperature T ei, suction temperature Ts and electronic expansion valve opening EEV, if detection unit enters defrosting, do not reach t minute running time, continue timing,
(3) calculate Td-Tei, Ts-Tde, whether following three conditions of judgement meet simultaneously: Td-Tei >=a2, Ts-Tde >=b2, EEV >=c2, if it is compressor emergency shutdown report fault, if otherwise unit continues operation.
2. air-cooled modular cold and hot water unit according to claim 1 lacks the guard method of fluorine, it is characterized in that: described t minute is 10～15 minutes.
3. air-cooled modular cold and hot water unit according to claim 1 lacks the guard method of fluorine, it is characterized in that: described a1 is 45～50 ℃; Described b1 is 7～10 ℃; Described c1 is 470.
4. air-cooled modular cold and hot water unit according to claim 1 lacks the guard method of fluorine, it is characterized in that: described a2 is 55～60 ℃; Described b2 is 10～15 ℃; Described c2 is 470.
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| CN201310537943.3A CN103557578B (en) | 2013-11-04 | 2013-11-04 | Air-cooled modular cold and hot water unit lacks the guard method of fluorine |
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| CN201310537943.3A CN103557578B (en) | 2013-11-04 | 2013-11-04 | Air-cooled modular cold and hot water unit lacks the guard method of fluorine |
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| CN103557578A true CN103557578A (en) | 2014-02-05 |
| CN103557578B CN103557578B (en) | 2016-02-03 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949278A (en) * | 2015-06-25 | 2015-09-30 | 海信（山东）空调有限公司 | Method and device for detecting refrigerant leakage of air conditioner and air-conditioning device |
| CN107525208A (en) * | 2017-07-10 | 2017-12-29 | 珠海格力电器股份有限公司 | Lack of fluorine of air-conditioners detection method and device |
| CN109114748A (en) * | 2018-08-20 | 2019-01-01 | 宁波奥克斯电气股份有限公司 | A kind of air-conditioning delays frosting control method, device and air conditioner |
| CN110243114A (en) * | 2018-03-07 | 2019-09-17 | 佛山市顺德区美的饮水机制造有限公司 | Water dispenser and its refrigeration fault detection method |
| CN110940091A (en) * | 2019-12-09 | 2020-03-31 | 珠海格力电器股份有限公司 | Fluorine deficiency judgment method and heat pump water heater |
| CN113531942A (en) * | 2021-07-28 | 2021-10-22 | 广东纽恩泰新能源科技发展有限公司 | Automatic control method and device for heat pump |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477778B (en) * | 2017-08-11 | 2019-10-18 | 宁波奥克斯电气股份有限公司 | Air-conditioning heating lacks fluorine protection and prevents the control method of high frequent overload protection |
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| CN101929719A (en) * | 2010-08-27 | 2010-12-29 | 宁波奥克斯空调有限公司 | Method for protecting compressor during fluorine lack of inverter air conditioner |
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| JPH10122711A (en) * | 1996-10-18 | 1998-05-15 | Matsushita Electric Ind Co Ltd | Refrigerating cycle control device |
| JP2005009857A (en) * | 1998-07-01 | 2005-01-13 | Daikin Ind Ltd | Freezing device and refrigerant leakage detection method |
| US6701722B1 (en) * | 2002-05-01 | 2004-03-09 | Samsung Electronics Co., Ltd. | Air conditioner and method of detecting refrigerant leakage therein |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949278A (en) * | 2015-06-25 | 2015-09-30 | 海信（山东）空调有限公司 | Method and device for detecting refrigerant leakage of air conditioner and air-conditioning device |
| CN107525208A (en) * | 2017-07-10 | 2017-12-29 | 珠海格力电器股份有限公司 | Lack of fluorine of air-conditioners detection method and device |
| CN110243114A (en) * | 2018-03-07 | 2019-09-17 | 佛山市顺德区美的饮水机制造有限公司 | Water dispenser and its refrigeration fault detection method |
| CN109114748A (en) * | 2018-08-20 | 2019-01-01 | 宁波奥克斯电气股份有限公司 | A kind of air-conditioning delays frosting control method, device and air conditioner |
| CN110940091A (en) * | 2019-12-09 | 2020-03-31 | 珠海格力电器股份有限公司 | Fluorine deficiency judgment method and heat pump water heater |
| CN110940091B (en) * | 2019-12-09 | 2020-11-24 | 珠海格力电器股份有限公司 | Fluorine deficiency judgment method and heat pump water heater |
| CN113531942A (en) * | 2021-07-28 | 2021-10-22 | 广东纽恩泰新能源科技发展有限公司 | Automatic control method and device for heat pump |
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Address after: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Applicant after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Applicant before: Ningbo AUX Electric Co., Ltd. |
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