CN103235225B - A kind of method and device detecting convertible frequency air-conditioner and lack fluorine running - Google Patents
A kind of method and device detecting convertible frequency air-conditioner and lack fluorine running Download PDFInfo
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Abstract
The invention discloses a kind of method and the device that detect convertible frequency air-conditioner and lack fluorine running, described method comprises step S10: compressor starts operates; S20: control unit judges that this operational mode still heats as freezing; S30: frequency sensor detects compressor frequency X, temperature sensor sensing chamber outer shroud temperature Y, current sensing means detects compressor current A, and all testing result is sent into control unit; S40: control unit is according to the judged result in step S20, and the compressor frequency X detected in step S30 and outdoor ring temperature Y, obtains the current minimum B corresponding with it and tolerance C; S50: the difference D of control unit calculating current minimum of a value B and tolerance C, and compressor current A and difference D is compared, if compressor current A is less than difference D, then judge lack of fluorine of air-conditioners, otherwise, judge that air-conditioning does not lack fluorine.Detection method provided by the present invention can save low tension switch, saves cost, and testing result accurately, reliably.
Description
Technical field
The present invention relates to convertible frequency air-conditioner field, more specifically, relate to a kind of method and the device that detect convertible frequency air-conditioner and lack fluorine running.
Background technology
At present, on convertible frequency air-conditioner, what adopt judges whether compressor lacks the means of fluorine, is mostly to be realize by installing low pressure switch, namely when low pressure switch disconnects, namely judges that compressor lacks fluorine, otherwise, then think normal.
This method above, although simply, need to install low pressure switch, this adds the manufacturing cost of air-conditioning undoubtedly.In addition, the parts of installation are more, more easily reduce accuracy of detection and reliability, and operating process also more complicated.
And concerning convertible frequency air-conditioner, when compressor lacks fluorine running, the load of compressor can reduce, and the bus current of compressor and the phase current of compressor also can reduce, by detecting bus current or the phase current of convertible frequency air-conditioner, just can judge whether compressor is in scarce fluorine operating condition.And adopt this kind of method to save low tension switch, save cost, and concerning Control Method of Inverter Air Conditioner, also do not increase other parts, only on the basis of original hardware, need be realized by software.
Based on above description, need a kind of electric current by detecting compressor badly and can judge whether compressor is in scarce fluorine operating condition method and device.
Summary of the invention
Based on above problem, the object of the present invention is to provide a kind of method and the device that detect convertible frequency air-conditioner and lack fluorine running, by the electric current detecting compressor, the method judges whether compressor lacks fluorine, concerning Control Method of Inverter Air Conditioner, do not increase other parts, only on the basis of original hardware, need be realized by software, can low tension switch be saved, save cost.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
Detect the method that convertible frequency air-conditioner lacks fluorine running, comprise the following steps,
S10: compressor starts operates;
S20: control unit judges that this operational mode still heats as freezing, and judged result is preserved;
S30: frequency sensor detects compressor frequency X, temperature sensor sensing chamber outer shroud temperature Y, current sensing means detects compressor current A, and all testing result is sent into control unit;
S40: control unit is according to the judged result in step S20, and the compressor frequency X detected in step S30 and outdoor ring temperature Y, obtains the current minimum B corresponding with it and tolerance C;
S50: the difference D of control unit calculating current minimum of a value B and tolerance C, and compressor current A and difference D is compared, if compressor current A is less than difference D, then judge lack of fluorine of air-conditioners, otherwise, judge that air-conditioning does not lack fluorine.
As preferably, in step s 30, the compressor current A that described current sensing means detects is compressor bus current.
As preferably, in step s 30, the compressor current A that described current sensing means detects is compressor phase current.
As preferably, in step s 40, described current minimum B and tolerance C is by acquisition of tabling look-up.
As preferably, in step s 40, described current minimum B and tolerance C is by calculating.
As preferably, in step s 30, Hall current sensor is adopted to detect compressor current A.
As preferably, noninductive resistance is adopted to detect compressor current A.
Detect the device that convertible frequency air-conditioner lacks fluorine running, comprising:
(1) detecting unit, at least comprise,
Frequency sensor, for detecting compressor frequency X;
Temperature sensor, for sensing chamber outer shroud temperature Y;
Current sensing means, for detecting compressor current A;
(2) control unit, at least there is following effect,
Judge that this operational mode still heats as freezing;
According to operational mode, the compressor frequency X detected and outdoor ring temperature Y, obtains the current minimum B corresponding with it and tolerance C;
The difference D of calculating current minimum of a value B and tolerance C, and compressor current A and difference D is compared, judge whether air-conditioning lacks fluorine according to comparative result.
As preferably, described current sensing means is Hall current sensor.
As preferably, described current sensing means is noninductive resistance.
Beneficial effect of the present invention is, because detection convertible frequency air-conditioner of the present invention lacks the method for fluorine running by detecting the electric current of compressor, can judge whether compressor lacks fluorine in conjunction with detection compressor frequency, outdoor ring temperature and operation mode, so judged result relatively accurately, reliably.And the method is concerning Control Method of Inverter Air Conditioner, does not increase other parts, only on the basis of original hardware, need be realized by software, so can low tension switch be saved, save cost.
Accompanying drawing explanation
The structural representation of the convertible frequency air-conditioner with scarce fluorine running checkout gear that Fig. 1 provides for the embodiment of the present invention one;
The structural representation of the convertible frequency air-conditioner with scarce fluorine running checkout gear that Fig. 2 provides for the embodiment of the present invention two.
Fig. 3 is the method flow diagram that detection convertible frequency air-conditioner provided by the invention lacks fluorine running.
In figure:
110, inversion unit; 120, compressor; 130, control unit; 140, current sensing means;
210, inversion unit; 220, current sensing means; 221, the first current sensing means; 222, the second current sensing means; 230, compressor; 240, control unit.
Detailed description of the invention
Technical scheme of the present invention is further illustrated below by detailed description of the invention.
Embodiment one:
The structural representation of the convertible frequency air-conditioner with scarce fluorine running checkout gear that Fig. 1 provides for the embodiment of the present invention one.As shown in Figure 1, in the present embodiment, the off-premises station of convertible frequency air-conditioner comprises compressor 120, compressor 120 has three binding posts, three binding posts are connected with inversion unit 110 by three-line, inversion unit 110 is connected with power supply, and power supply inlet highway electric current is to inversion unit 110, and inversion unit 110 exports phase line current to compressor 120.The device detecting the whether scarce fluorine running of convertible frequency air-conditioner comprises detecting unit and control unit 130.
Detecting unit at least comprises frequency sensor, temperature sensor and current sensing means 140.
Wherein the output of frequency sensor is connected with control unit 130, for detecting compressor frequency X, and the compressor frequency value detected is sent into control unit 130.
The output of temperature sensor is connected with control unit 130, for sensing chamber outer shroud temperature Y, and the outdoor ring temperature value Y detected is sent into control unit 130.
Current sensing means 140 is for detecting compressor current A.In the present embodiment, on the line of current sensing means 140 between inversion unit 110 and power supply, output is connected with control unit 130, for detecting compressor bus current A, and the compressor bus current A detected is sent into control unit 130.After convertible frequency air-conditioner start, when compressor 120 starts running, namely control unit 130 judges the operation mode of air-conditioning, and is preserved by operation mode, judges whether air-conditioning lacks fluorine running afterwards in conjunction with compressor frequency X, outdoor ring temperature value Y, operational mode and compressor bus current A.
Wherein control unit 130 at least has following effect: judge that this operational mode still heats as freezing; According to operational mode, the compressor frequency X detected and outdoor ring temperature Y, obtains the current minimum B corresponding with it and tolerance C; The difference D of calculating current minimum of a value B and tolerance C, and compressor bus current A and difference D is compared, judge whether air-conditioning lacks fluorine according to comparative result.
In the present embodiment, preferably, described current sensing means 140 is Hall current sensor.Described Hall current sensor by the compressor bus current A direct-drive that detects to control unit 130.
In the present embodiment, as another kind of preferred version, described current sensing means 140 can also be noninductive resistance.The compressor bus current value that described noninductive resistance detects is less, so also need to connect between noninductive resistance and control unit 130 road of far discharging, is sent to control unit 130 after the compressor bus current value detected being amplified by road of far discharging again.
Fig. 3 is the method flow diagram that detection convertible frequency air-conditioner provided by the invention lacks fluorine running.As shown in Figure 3, this kind of detection convertible frequency air-conditioner lacks the method for fluorine running, comprises the following steps,
S10: compressor starts operates.
S20: control unit judges that this operational mode still heats as freezing, and judged result is preserved.
S30: frequency sensor detects compressor frequency X, temperature sensor sensing chamber outer shroud temperature Y, current sensing means detects compressor bus current A, and testing result is all sent into control unit by frequency sensor, temperature sensor and current sensing means.
S40: control unit is according to the judged result in step S20, and the compressor frequency X detected in step S30 and outdoor ring temperature Y, obtains the current minimum B corresponding with it and tolerance C.
In the present embodiment, preferably, described current minimum B and tolerance C can by acquisition of tabling look-up.Concrete, in advance by corresponding to compressor frequency X, outdoor ring temperature Y and operational mode current minimum B and the tolerance C table of comparisons put into memory cell, during work, control unit goes to search corresponding current minimum B and tolerance C in the table of comparisons according to compressor frequency X, outdoor ring temperature Y and operational mode.
In the present embodiment, as another kind of preferred version, described current minimum B and tolerance C also can by calculating.Concrete, control unit calculates current minimum B and tolerance C according to compressor frequency X, outdoor ring temperature Y and operational mode respectively by corresponding operational formula.
S50: the difference D of control unit calculating current minimum of a value B and tolerance C, and compressor bus current A and difference D is compared, if compressor bus current A is less than difference D; then judge lack of fluorine of air-conditioners; enter scarce fluorine guard mode, otherwise, judge that air-conditioning does not lack fluorine.
Embodiment two:
The structural representation of the convertible frequency air-conditioner with scarce fluorine running checkout gear that Fig. 2 provides for the embodiment of the present invention two.As shown in Figure 2, in the present embodiment, be with the difference of embodiment one, current sensing means 220 comprises the first current sensing means 221 and the second current sensing means 222, wherein the first current sensing means 221 and the second current sensing means 222 lay respectively between inversion unit 210 and compressor 230 three lines on any two lines on, for detecting compressor phase current A, and the first current sensing means 221 is all connected with control unit 240 with the output of the second current sensing means 222.After first current sensing means 221 and the second current sensing means 222 detect measured compressed machine phase current A, be transported to control unit 240.Also be with the difference of embodiment one, compressor phase current A and difference D compares by control unit 240, judges whether air-conditioning lacks fluorine according to comparative result.
In the present embodiment, the first current sensing means 221 and the second current sensing means 222, wherein first and second just in order to distinguish all parts, but do not represent the significance level of each parts.
Identical with embodiment one, in the present embodiment, preferably, described current sensing means both can be Hall current sensor also can be noninductive resistance.
The detection convertible frequency air-conditioner that the present embodiment provides lacks the method for fluorine running and the method difference that provides of embodiment one is, in step s 30, the compressor current A that described current sensing means detects is compressor phase current A.In step s 50, the difference D of control unit calculating current minimum of a value B and tolerance C, and compressor phase current A and difference D is compared.All the other steps are all identical with embodiment one.
Because detection convertible frequency air-conditioner of the present invention lacks the method for fluorine running by detecting the electric current of compressor, combining and detecting compressor frequency, outdoor ring temperature and operation mode and can judge whether compressor lacks fluorine, thus judged result is relatively more accurate, reliably.And the method is concerning Control Method of Inverter Air Conditioner, does not increase other parts, only on the basis of original hardware, need be realized by software, so can low tension switch be saved, save cost.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (10)
1. detect the method that convertible frequency air-conditioner lacks fluorine running, it is characterized in that, comprise the following steps,
S10: compressor starts operates;
S20: control unit judges that this operational mode still heats as freezing, and judged result is preserved;
S30: frequency sensor detects compressor frequency X, temperature sensor sensing chamber outer shroud temperature Y, current sensing means detects compressor current A, and all testing result is sent into control unit;
S40: control unit is according to the judged result in step S20, and the compressor frequency X detected in step S30 and outdoor ring temperature Y, obtains the current minimum B corresponding with compressor frequency X, outdoor ring temperature Y and operational mode and tolerance C;
S50: the difference D of control unit calculating current minimum of a value B and tolerance C, and compressor current A and difference D is compared, if compressor current A is less than difference D, then judge lack of fluorine of air-conditioners, otherwise, judge that air-conditioning does not lack fluorine.
2. detection convertible frequency air-conditioner according to claim 1 lacks the method for fluorine running, and it is characterized in that, in step s 30, the compressor current A that described current sensing means detects is compressor bus current.
3. detection convertible frequency air-conditioner according to claim 1 lacks the method for fluorine running, and it is characterized in that, in step s 30, the compressor current A that described current sensing means detects is compressor phase current.
4. detection convertible frequency air-conditioner according to claim 1 lacks the method for fluorine running, and it is characterized in that, in step s 40, described current minimum B and tolerance C is by acquisition of tabling look-up.
5. detection convertible frequency air-conditioner according to claim 1 lacks the method for fluorine running, and it is characterized in that, in step s 40, described current minimum B and tolerance C is by calculating.
6. detection convertible frequency air-conditioner according to claim 1 lacks the method for fluorine running, it is characterized in that, in step s 30, adopts noninductive resistance to detect compressor current A.
7. detection convertible frequency air-conditioner according to claim 1 lacks the method for fluorine running, it is characterized in that, adopts giant magnetoresistance current sensor to detect compressor current A.
8. detect the device that convertible frequency air-conditioner lacks fluorine running, it is characterized in that, comprising:
(1) detecting unit, at least comprise,
Frequency sensor, for detecting compressor frequency X;
Temperature sensor, for sensing chamber outer shroud temperature Y;
Current sensing means (140,220), for detecting compressor current A;
(2) control unit (130,240), at least there is following effect,
Judge that this operational mode still heats as freezing;
According to operational mode, the compressor frequency X detected and outdoor ring temperature Y, obtains the current minimum B corresponding with compressor frequency X, outdoor ring temperature Y and operational mode and tolerance C;
The difference D of calculating current minimum of a value B and tolerance C, and compressor current A and difference D is compared, judge whether air-conditioning lacks fluorine according to comparative result.
9. detection convertible frequency air-conditioner according to claim 8 lacks the device of fluorine running, and it is characterized in that, described current sensing means (140,220) is Hall current sensor.
10. detection convertible frequency air-conditioner according to claim 8 lacks the device of fluorine running, and it is characterized in that, described current sensing means (140,220) is noninductive resistance.
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| CN104566846A (en) * | 2013-10-24 | 2015-04-29 | 广州南洋理工职业学院 | Fluorine shortage protection method for air conditioner |
| CN103884480B (en) * | 2014-03-14 | 2016-07-06 | 广东美的制冷设备有限公司 | Coolant leakage detection method, refrigerant leakage detecting system and air-conditioner |
| CN104033994B (en) * | 2014-06-20 | 2016-10-05 | 四川长虹电器股份有限公司 | A kind of method detecting Oil repellent and air-conditioning |
| CN104061656B (en) * | 2014-07-04 | 2017-05-10 | 珠海格力电器股份有限公司 | Fluorine-deficiency protection method and device for air conditioner |
| CN104075415B (en) * | 2014-07-04 | 2016-08-24 | 珠海格力电器股份有限公司 | Fluorine-deficiency protection method and device for air conditioner |
| CN104566810B (en) * | 2014-12-26 | 2017-09-05 | 宁波奥克斯电气股份有限公司 | The method whether frequency-changeable compressor of domestic multi-connection machine dallies is judged during refrigeration |
| CN104596028B (en) * | 2014-12-26 | 2017-09-29 | 宁波奥克斯电气股份有限公司 | The method whether frequency-changeable compressor of domestic multi-connection machine dallies is judged when heating |
| CN105509241B (en) * | 2015-12-23 | 2019-03-05 | 宁波奥克斯电气股份有限公司 | The method, apparatus and air conditioner that whether temperature sensing package falls off in condenser tube judged |
| CN106839277B (en) * | 2017-01-03 | 2019-10-01 | 青岛海尔空调器有限总公司 | A kind of control method and device of lack of fluorine of air-conditioners detection |
| CN107062559B (en) * | 2017-05-25 | 2019-04-30 | 绵阳美菱软件技术有限公司 | A kind of air conditioner lacks fluorine detection method, device and air-conditioning system |
| CN113352844A (en) * | 2021-07-13 | 2021-09-07 | 青岛海信网络能源股份有限公司 | Parking air conditioner and control method thereof |
| CN115371205B (en) * | 2022-08-25 | 2024-06-07 | 珠海格力电器股份有限公司 | Air conditioning system circulation abnormality detection method and device, electronic equipment and medium |
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