CN104566846A - Fluorine shortage protection method for air conditioner - Google Patents

Fluorine shortage protection method for air conditioner Download PDF

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Publication number
CN104566846A
CN104566846A CN201310513696.3A CN201310513696A CN104566846A CN 104566846 A CN104566846 A CN 104566846A CN 201310513696 A CN201310513696 A CN 201310513696A CN 104566846 A CN104566846 A CN 104566846A
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CN
China
Prior art keywords
fluorine
air
conditioning
lack
conditioners
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201310513696.3A
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Chinese (zh)
Inventor
黄勇超
陈文冠
董凯军
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Guangzhou Nanyang College
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Guangzhou Nanyang College
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Application filed by Guangzhou Nanyang College filed Critical Guangzhou Nanyang College
Priority to CN201310513696.3A priority Critical patent/CN104566846A/en
Publication of CN104566846A publication Critical patent/CN104566846A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays

Abstract

The invention discloses a fluorine shortage protection method for an air conditioner. Fluorine shortage is considered that the air volume is relatively surplus for the fluorine content; under fluorine shortage, the tube temperature in the middle of an evaporator is basically unchanged. The air conditioner can be judged to be in fluorine shortage only if the tube temperature in the middle of the evaporator is basically unchanged by detecting the tube temperature in the middle of the evaporator according to periodical operation at the reduced air speed of an indoor unit. The fluorine shortage protection method has the characteristics that the practicability is achieved, no manufacturing cost is needed, and a compressor can be protected in time.

Description

Lack of fluorine of air-conditioners guard method
Technical field:
The present invention relates to a kind of lack of fluorine of air-conditioners guard method.
Background technology:
In the refrigeration or heating operation of air-conditioning, often run into the fault of scarce fluorine.Lack of fluorine of air-conditioners, causes compressor motor stator coil and lubricating oil to cool bad.The former causes magnet wire insulation resistance to reduce, and causes coil short; The latter causes greasy property to decline, and causes compression member and motor bearings sharp wear.Wearing and tearing reduce the compression efficiency of compressor, abrasive dust also can cause strainer screen or the capillary mouth of pipe dirty stifled.
Lack fluorine during air conditioner refrigerating to judge often through phenomenon, as connected tracheae without condensation water, connecting fluid duct ligation frost, indoor and outdoor machine air draft is with or without hotness, and evaporimeter frosting area is too little, and scupper hose is without draining, and after shutting down, pressure is without larger change, and running current is too little.
After these scarce fluorine phenomenons occur, air-conditioning is not shut down in time, and compressor abrasion thus cycle efficieny reduce.After air-conditioning note fluorine, often than the more power consumption in the past of note fluorine.
When air-conditioning heating occurs lacking fluorine, because of heat, air-conditioning can occur that anti-cold wind is protected less, easily judge.
The detection method of current lack of fluorine of air-conditioners can install low tension switch at compressor air suction mouth.Air-conditioning work circumstance complication, the operating pressure of low tension switch can not design get Tai Gao.Therefore, low tension switch also only carries out compressor shutdown protection when serious scarce fluorine, and before protection, compressor is still in operation.The scarce fluorine protection advantage of low tension switch is accuracy of judgement, but protected effect is poor.
Summary of the invention:
Object of the present invention aims to provide a kind of lack of fluorine of air-conditioners guard method, and this method is: in operation of air conditioner, periodically carries out scarce fluorine detection by the pipe temperature sensor in the middle part of indoor evaporator.When lacking fluorine detection, indoor fan reduces wind shelves and runs, and evaporimeter central tube temperature is substantially constant, can judge lack of fluorine of air-conditioners.
The scarce fluorine guard method of this air conditioner refrigerating, the pipe temperature sensor in the middle part of indoor evaporator periodically carries out scarce fluorine detection.
The scarce fluorine guard method of this air conditioner refrigerating, when air-conditioning carries out the detection of scarce fluorine, indoor fan reduces wind shelves and runs.
The method that this scarce fluorine judges is based on the basic heat transfer process analyzing indoor evaporator.
The air-conditioner of refrigerant abundance, under different internal and external environments, the refrigerant of evaporimeter inside has different temperature values, and therefore, the actual temp value of carrying out scarce fluorine judgement is difficult to determine, but can determine that scarce fluorine judges enter temperature value.Change air quantity, the refrigerant temperature of evaporimeter inside is substantially constant is the key character of scarce fluorine.
In process of refrigerastion, when refrigerant is sufficient, the refrigerant temperature of the large then evaporimeter inside of indoor air quantity is higher, and indoor air quantity is little then lower.Illustrate that the refrigerant temperature of evaporimeter inside is relevant with the thermic load of evaporimeter.When lack of fluorine of air-conditioners, indoor air quantity relative surplus, the refrigerant temperature of evaporimeter inside is substantially constant, has nothing to do with air force.The refrigerant temperature of evaporimeter inside detects evaporimeter central tube temperature by pipe temperature sensor to obtain.
In the process that scarce fluorine detects, can think in the short time that indoor environment temperature is relatively stable, convertible frequency air-conditioner does not temporarily change compressor operating frequency.Therefore, lack of fluorine of air-conditioners can pass through to change indoor air quantity, and test evaporator central tube temperature judges:
1, transfer air quantity in air conditioning chamber to apoplexy from high wind, evaporimeter central tube temperature is substantially constant, illustrates: the fluorine amount of the relative air-conditioning inside of air quantity of apoplexy shelves, superfluous.Lack of fluorine of air-conditioners.
2, transfer air quantity in air conditioning chamber to low wind from apoplexy again, evaporimeter central tube temperature is substantially constant, illustrates: the fluorine amount of the relative air-conditioning inside of air quantity of low wind shelves, superfluous.Air-conditioning is more serious scarce fluorine.
Therefore, the situation of lack of fluorine of air-conditioners is weighed with air quantity, can shut down before free-floride, or shuts down in time time floride-free, long-play when effectively avoiding compressor to lack fluorine.
Enter scarce fluorine to detect, preferably set the running current of air-conditioning, need to set up undercurrent relay.Undercurrent relay action setting value should close to or the minimum current that equals in Air-conditioner design.Minimum current refers to the electric current that air-conditioning records when minimum cooling condition runs.Because during scarce fluorine, evaporimeter central tube temperature is higher, also can set a higher temperature and enter, not increase material cost.
Lack after fluorine is shut down and check out leakage fluorine position, noting fluorine after having keeped in repair can normally run; If the dirty stifled scarce fluorine caused of system is shut down, then need to check dirty stifled position by conventional method, although be not really lack fluorine, also reach the object effectively protecting compressor.
Accompanying drawing illustrates:
Fig. 1: the process of lack of fluorine of air-conditioners protection
Fig. 2: the flow chart of lack of fluorine of air-conditioners apoplexy protection
Fig. 3: the flow chart of the low wind protection of lack of fluorine of air-conditioners
Detailed description of the invention:
Fig. 1: the process of lack of fluorine of air-conditioners protection
The data of lack of fluorine of air-conditioners protection are stored in the memory of indoor mainboard periphery.
Change indoor wind shelves in operation of air conditioner process, indoor pipe temperature sensor detects evaporimeter central tube temperature, by sensor circuit, temperature signal is converted to voltage signal, is sent in microprocessor (mainboard).The voltage signal of input is converted to the temperature value recorded by microprocessor, compares with the temperature value stored in memory, judges whether air-conditioning lacks fluorine and shut down.Pipe temperature sensor periodically detects evaporimeter central tube temperature, reaches the sustainable protection whether air-conditioning being lacked to fluorine.
Fig. 2: the flow chart of lack of fluorine of air-conditioners apoplexy protection
Air conditioner refrigerating overload protection runs on the data basis stored.The data stored comprise: lack fluorine detection and enter temperature T in(desirable about 15 DEG C), lack the judgement temperature T of fluorine protection f(supposing 1 DEG C), becomes wind t shelves (referring to apoplexy and low wind) running time j(supposing 30s), lacks fluorine sense cycle T (desirable 30min), and the record upper cycle lacks t running time after fluorine detection.
If t>T or t=T sets up, meet the cycle request lacking fluorine and detect, then measure evaporimeter central tube temperature T when air-conditioning height wind runs 1and record; If T 1>T inset up, meet the temperature requirement lacking fluorine and detect, then enter scarce fluorine protection flow process: air-conditioning air volume becomes apoplexy from high wind, runs t j, measure evaporimeter central tube temperature T 2and record; If ︱ is T 1-T 2︱ <T fset up, air-conditioning lacks fluorine relative to apoplexy shelves, shuts down.
If t>T or t=T is false, the running time that the upper cycle lacks after fluorine detection is not enough, continues timing.
If T 1>T inbe false, air-conditioning does not lack fluorine, is equivalent to this cycle detection and terminates, t=0, enter the timing in next cycle.
If ︱ is T 1-T 2︱ <T fbe false, air-conditioning does not lack fluorine relatively, and air quantity transfers high wind to by apoplexy, t=0, enters the timing in next cycle.
In the flow process of above-mentioned lack of fluorine of air-conditioners protection, indoor fan every grade wind speed must run a period of time t j, evaporimeter central tube temperature T 1, T 2detected by indoor pipe temperature sensor.Change variable air volume running a period of time, ensure that refrigeration system is basicly stable.
Fig. 3: the flow chart of the low wind protection of lack of fluorine of air-conditioners
Air conditioner refrigerating overload protection runs on the data basis stored.The data stored comprise: lack fluorine detection and enter temperature T in(desirable about 15 DEG C), lack the judgement temperature T of fluorine protection f(supposing 1 DEG C), becomes wind t shelves (referring to apoplexy and low wind) running time j(supposing 30s), lacks fluorine sense cycle T (desirable 30min), and the record upper cycle lacks t running time after fluorine detection.
If t>T or t=T sets up, meet the cycle request lacking fluorine and detect, then measure evaporimeter central tube temperature T when air-conditioning height wind runs 1and record; If T 1>T inset up, meet the temperature requirement lacking fluorine and detect, then enter scarce fluorine protection flow process: air-conditioning air volume becomes apoplexy from high wind, runs t j, measure evaporimeter central tube temperature T 2and record; If ︱ is T 1-T 2︱ <T fset up, air-conditioning lacks fluorine relative to apoplexy shelves, and then apoplexy becomes low wind; Air-conditioning air volume becomes after low wind from apoplexy, runs t j, measure evaporimeter central tube temperature T 2and record, if ︱ is T 1-T 2︱ <T fset up, air-conditioning lacks fluorine relative to low wind shelves, shuts down, and air-conditioning more seriously lacks fluorine.
If t>T or t=T is false, the running time that the upper cycle lacks after fluorine detection is not enough, continues timing.
If T 1>T inbe false, air-conditioning does not lack fluorine, is equivalent to this cycle detection and terminates, t=0, enter the timing in next cycle.
If ︱ is T 1-T 2︱ <T fbe false, air-conditioning does not lack fluorine relatively, and air quantity transfers high wind to by apoplexy or low wind transfers high wind to, t=0, enters the timing in next cycle.
In the flow process of above-mentioned lack of fluorine of air-conditioners protection, indoor fan every grade wind speed must run a period of time t j, evaporimeter central tube temperature T 1, T 2detected by indoor pipe temperature sensor.Change variable air volume running a period of time, ensure that refrigeration system is basicly stable.

Claims (3)

1. a lack of fluorine of air-conditioners guard method, this method is:
In operation of air conditioner, periodically carry out scarce fluorine detection by the pipe temperature sensor in the middle part of indoor evaporator.When lacking fluorine detection, indoor fan reduces wind shelves and runs, and evaporimeter central tube temperature is substantially constant, can judge lack of fluorine of air-conditioners.
2. air-conditioning overload protection method according to claim 1, is characterized in that: the pipe temperature sensor in the middle part of indoor evaporator periodically carries out scarce fluorine detection.
3. air-conditioning overload protection method according to claim 1, is characterized in that: when air-conditioning carries out the detection of scarce fluorine, and indoor fan reduces wind shelves and runs.
CN201310513696.3A 2013-10-24 2013-10-24 Fluorine shortage protection method for air conditioner Pending CN104566846A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310513696.3A CN104566846A (en) 2013-10-24 2013-10-24 Fluorine shortage protection method for air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310513696.3A CN104566846A (en) 2013-10-24 2013-10-24 Fluorine shortage protection method for air conditioner

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CN104566846A true CN104566846A (en) 2015-04-29

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104819547A (en) * 2015-05-15 2015-08-05 珠海格力电器股份有限公司 Method and system for fluorine lacking detection and protection during startup of variable frequency air-conditioning system
CN106403169A (en) * 2016-09-06 2017-02-15 珠海格力电器股份有限公司 Fluorine-insufficiency protection method and device and air conditioner
CN108131776A (en) * 2017-12-29 2018-06-08 Tcl空调器(中山)有限公司 A kind of lack of fluorine of air-conditioners guard method and air conditioner
CN108278715A (en) * 2017-01-04 2018-07-13 奥克斯空调股份有限公司 A kind of air conditioner lacks fluorine guard method and the air conditioner with scarce fluorine defencive function
CN108826556A (en) * 2018-08-22 2018-11-16 Tcl空调器(中山)有限公司 Air-conditioning system, the control method of air-conditioning system and computer readable storage medium
CN109114747A (en) * 2018-08-03 2019-01-01 奥克斯空调股份有限公司 A kind of lack of fluorine of air-conditioners detection method, detection system and air-conditioning
CN112815478A (en) * 2020-12-31 2021-05-18 青岛海尔空调电子有限公司 Fluorine deficiency determination method for air conditioning system and air conditioning system

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CN101526259A (en) * 2009-03-31 2009-09-09 宁波海诚电器有限公司 Detection and protection method of lack of fluorine of air-conditioners
CN201382520Y (en) * 2009-03-25 2010-01-13 宁波奥克斯空调有限公司 Compressor protecting device for air conditioner in short of fluoride
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
CN103235225A (en) * 2013-04-25 2013-08-07 青岛海尔空调电子有限公司 Method and device for detecting fluorine-deficient operation of variable frequency air conditioner
CN103363617A (en) * 2012-04-10 2013-10-23 珠海格力电器股份有限公司 Detection method and detection device for fluorine lack of air conditioner, and air conditioner

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Publication number Priority date Publication date Assignee Title
CN201382520Y (en) * 2009-03-25 2010-01-13 宁波奥克斯空调有限公司 Compressor protecting device for air conditioner in short of fluoride
CN101526259A (en) * 2009-03-31 2009-09-09 宁波海诚电器有限公司 Detection and protection method of lack of fluorine of air-conditioners
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
CN103363617A (en) * 2012-04-10 2013-10-23 珠海格力电器股份有限公司 Detection method and detection device for fluorine lack of air conditioner, and air conditioner
CN103235225A (en) * 2013-04-25 2013-08-07 青岛海尔空调电子有限公司 Method and device for detecting fluorine-deficient operation of variable frequency air conditioner

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104819547A (en) * 2015-05-15 2015-08-05 珠海格力电器股份有限公司 Method and system for fluorine lacking detection and protection during startup of variable frequency air-conditioning system
CN104819547B (en) * 2015-05-15 2017-09-22 珠海格力电器股份有限公司 The detection of scarce fluorine and guard method and system during a kind of frequency-conversion air-conditioning system start
CN106403169A (en) * 2016-09-06 2017-02-15 珠海格力电器股份有限公司 Fluorine-insufficiency protection method and device and air conditioner
CN106403169B (en) * 2016-09-06 2020-11-20 珠海格力电器股份有限公司 Fluorine-deficient protection method and device and air conditioner
CN108278715A (en) * 2017-01-04 2018-07-13 奥克斯空调股份有限公司 A kind of air conditioner lacks fluorine guard method and the air conditioner with scarce fluorine defencive function
CN108131776A (en) * 2017-12-29 2018-06-08 Tcl空调器(中山)有限公司 A kind of lack of fluorine of air-conditioners guard method and air conditioner
CN109114747A (en) * 2018-08-03 2019-01-01 奥克斯空调股份有限公司 A kind of lack of fluorine of air-conditioners detection method, detection system and air-conditioning
CN108826556A (en) * 2018-08-22 2018-11-16 Tcl空调器(中山)有限公司 Air-conditioning system, the control method of air-conditioning system and computer readable storage medium
CN112815478A (en) * 2020-12-31 2021-05-18 青岛海尔空调电子有限公司 Fluorine deficiency determination method for air conditioning system and air conditioning system

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