CN103388883A - Method for judging leakage of refrigerant in inverter air conditioner and inverter air conditioner - Google Patents
Method for judging leakage of refrigerant in inverter air conditioner and inverter air conditioner Download PDFInfo
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- CN103388883A CN103388883A CN2013103259352A CN201310325935A CN103388883A CN 103388883 A CN103388883 A CN 103388883A CN 2013103259352 A CN2013103259352 A CN 2013103259352A CN 201310325935 A CN201310325935 A CN 201310325935A CN 103388883 A CN103388883 A CN 103388883A
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Abstract
The invention is suitable for the technical field of household appliances, and provides a method for judging leakage of a refrigerant in an inverter air conditioner. The method comprises the following steps: obtaining temperature T of a coil pipe of an indoor unit before the compressor of the inverter air conditioner is operated; obtaining temperature T1 of the coil pipe of the indoor unit and indoor temperature TC1; judging whether the absolute value of the difference of T and T1 is smaller than a first temperature threshold value d1 and moreover the absolute value of the difference of TC1 and T1 is smaller than d2, if so, adjusting the inverter air conditioner from the topmost wind gear to the lowest wind gear; operating the inverter air conditioner at the lowest wind gear for a second set time t2; obtaining the temperature T2 of the coil pipe of the indoor unit and the indoor temperature TC2; and when the absolute value of the difference of T and T2 is smaller than d1 and moreover the absolute value of the difference of TC2 and T2 is smaller than d2, determining the leakage of the refrigerant in the inverter air conditioner, and stopping the operation of the compressor. The technical scheme provided by the invention has the advantage of low misjudgment rate.
Description
Technical field
The invention belongs to field of household appliances, relate in particular to decision method and the transducer air conditioning of refrigrant leakage in a kind of transducer air conditioning.
Background technology
Existing room air conditioner unit, following two kinds of methods are generally taked in a large amount of leakages for cold-producing medium: one, add low tension switch on the frequency-changeable compressor muffler, when pressure, during lower than setting value, report low-voltage variation, stop the operation of compressor.Two, there is no special safeguard measure, rely on the protection of compressor top protector.
Above-mentioned control method one, because outdoor condition range is-15 ℃～50 ℃, therefore the pressure of inspiration(Pi) while not considering the unit defrosting, the pressure of inspiration(Pi) R410A scope of compressor is 1.6bar～10.8bar, for fear of the low tension switch misoperation, the setting value of action is generally the 0.8bar left and right.Because working value arranges on the low sidely, only could move after unit leaks cold-producing medium 75% or more, so for refrigrant leakage less than 75% can not play a protective role.control method two, after a large amount of leakages of cold-producing medium, the ability of refrigerant cooling compressor reduces greatly, because the top protector is external, the cavity temperature that can not reflect really compressor, before the compressor top protection, the compressor chamber temperature is very high, compressor greatly may demagnetize, particularly the rare earth compressor runs into this situation and more easily demagnetizes, and existing compressor below 3 and 3 has been cancelled the top protection, only rely on the delivery temperature protection, but leakage of refrigerant surpasses when a certain amount of, show that the delivery temperature on exhaust sensor is in fact not high, this moment, the exhaust protection just lost effect, can't reach the effect of protection.
Existing most of producer utilize indoor coil pipe under refrigeration mode whether higher than setting coil temperature, come the decision-making system refrigerant whether to reveal.There is following defect in the method: when indoor temperature is very low and indoor coil pipe sensor temperature while lower skew occurring, will causes indoor coil pipe to be in all the time setting coil temperature lower than secondary refrigerant leakage, thereby cause protection to be lost efficacy, and namely cause erroneous judgement.
In addition, whether Some Enterprises utilizes the difference of indoor coil pipe and indoor environment temperature to come the decision-making system refrigerant to reveal.There is following defect in the method: when hot and humid situation appears in indoor environment, while freezing maximum windscreen, indoor coil pipe and indoor temperature difference are less, the difference of indoor coil pipe and indoor environment temperature easily occurs lower than setting the temperature difference, thereby just likely cause erroneous judgement.
Summary of the invention
The purpose of the embodiment of the present invention is to provide the decision method of refrigrant leakage in a kind of transducer air conditioning, is intended to solve prior art and easily causes the problem of erroneous judgement.
First aspect, provide the decision method of refrigrant leakage in a kind of transducer air conditioning, and described method comprises as follows:
Obtain compressor coiler temperature T in the operation cup of transducer air conditioning;
In the operation of the highest windscreen and compressor operating frequency greater than the first setpoint frequency f
1After, at operation the first setting-up time t
1, obtain indoor set coil temperature T
1With indoor temperature T
C1
Judgement T and T
1Whether poor absolute value is less than the first temperature threshold d
1, judgement T
C1With T
1Whether poor absolute value is less than the second temperature threshold d
2;
At T and T
1Poor absolute value is less than d
1And T
C1With T
1Poor absolute value is less than d
2The time, transducer air conditioning is modulated to minimum wind gear from the highest wind gear;
At minimum wind gear operation the second setting-up time t
2Obtain indoor set coil temperature T
2With indoor temperature T
C2
Judgement T and T
2Whether poor absolute value is less than the 3rd temperature threshold d
3, judgement T
C2With T
2Whether poor absolute value is less than the 4th temperature threshold d
4;
At T and T
2Poor absolute value is less than d
1And T
C2With T
2Poor absolute value is less than d
2The time, the refrigrant leakage of judgement transducer air conditioning, stop compressor operating;
Described transducer air conditioning the refrigeration or dehumidification mode under, 7.5 ℃ ≦＜=d
1≦＜=4.5 ℃; 7.5 ℃ ≦＜=d
2≦＜=4.5 ℃;
Described transducer air conditioning under heating mode, 14.5 ℃ 〉=d
1〉=11.5 ℃; 14.5 ℃ 〉=d
2〉=11.5 ℃
The scope of described indoor set coil temperature is :-15 ℃＜=T＜=70 ℃.
In conjunction with the technical scheme of first aspect, in the first possibility of first aspect,
Described the first temperature threshold d
1With described the 3rd temperature threshold d
3Value equate;
Described the second temperature threshold d
2With described the 4th temperature threshold d
4Value equate.
Second aspect, provide a kind of transducer air conditioning, and described transducer air conditioning comprises:
Acquiring unit, for the compressor that obtains transducer air conditioning coiler temperature T in the operation cup;
The operation unit, be used in the highest windscreen operation and compressor operating frequency greater than the first setpoint frequency f
1After, at operation the first setting-up time t
1
Acquiring unit, also be used for obtaining indoor set coil temperature T
1With indoor temperature T
C1
The first judging unit, be used for judgement T and T
1Whether poor absolute value is less than the first temperature threshold d
1, judgement T
C1With T
1Whether poor absolute value is less than the second temperature threshold d
2;
Adjustment unit, be used for going out T and T in described the first judgment unit judges
1Poor absolute value is less than d
1And T
C1With T
1Poor absolute value is less than d
2The time, transducer air conditioning is modulated to minimum wind gear from the highest wind gear;
Described operation unit, also be used at minimum wind gear operation the second setting-up time t
2
Described acquiring unit, also be used for obtaining indoor set coil temperature T
2With indoor temperature T
C2
The second judging unit, be used for judgement T and T
2Whether poor absolute value is less than the 3rd temperature threshold d
3, judgement T
C2With T
2Whether poor absolute value is less than the 4th temperature threshold d
4;
Stop element, be used for described the second judgment unit judges and go out T and T
2Poor absolute value is less than d
1And T
C2With T
2Poor absolute value is less than d
2The time, the refrigrant leakage of judgement transducer air conditioning, stop compressor operating;
Described transducer air conditioning the refrigeration or dehumidification mode under, 7.5 ℃ ≦＜=d
1≦＜=4.5 ℃; 7.5 ℃ ≦＜=d
2≦＜=4.5 ℃;
Described transducer air conditioning under heating mode, 14.5 ℃ 〉=d
1〉=11.5 ℃; 14.5 ℃ 〉=d
2〉=11.5 ℃
The scope of described indoor set coil temperature is :-15 ℃＜=T＜=70 ℃.
In conjunction with the technical scheme of second aspect, in the first possibility of the second method,
Described the first temperature threshold d
1With described the 3rd temperature threshold d
3Value equate;
Described the second temperature threshold d
2With described the 4th temperature threshold d
4Value equate.
Compared with prior art, beneficial effect is the embodiment of the present invention: technical scheme of the present invention has advantages of the erroneous judgement of minimizing.
Description of drawings
Fig. 1 is the flow chart of the decision method of refrigrant leakage in a kind of transducer air conditioning of providing of the embodiment of the present invention;
Fig. 2 is the structure chart of a kind of transducer air conditioning of providing of the embodiment of the present invention.
The specific embodiment
, in order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The specific embodiment of the invention provides the decision method of refrigrant leakage in a kind of transducer air conditioning, and the method is completed by transducer air conditioning, and the method as shown in Figure 1, comprises the steps:
101, obtain compressor coiler temperature T in the operation cup of transducer air conditioning;
102, in the operation of the highest windscreen and compressor operating frequency greater than the first setpoint frequency f
1After, at operation the first setting-up time t
1, obtain indoor set coil temperature T
1With indoor temperature T
C1
103, judgement T and T
1Whether poor absolute value is less than the first temperature threshold d
1, judgement T
C1With T
1Whether poor absolute value is less than the second temperature threshold d
2;
104, at T and T
1Poor absolute value is less than d
1And T
C1With T
1Poor absolute value is less than d
2The time, transducer air conditioning is modulated to minimum wind gear from the highest wind gear;
105, at minimum wind gear operation the second setting-up time t
2Obtain indoor set coil temperature T
2With indoor temperature T
C2
106, judgement T and T
2Whether poor absolute value is less than the 3rd temperature threshold d
3, judgement T
C2With T
2Whether poor absolute value is less than the 4th temperature threshold d
4;
107, at T and T
2Poor absolute value is less than d
1And T
C2With T
2Poor absolute value is less than d
2The time, the refrigrant leakage of judgement transducer air conditioning, stop compressor operating.
Described transducer air conditioning the refrigeration or dehumidification mode under, 7.5 ℃ ≦＜=d
1≦＜=4.5 ℃; 7.5 ℃ ≦＜=d
2≦＜=4.5 ℃;
Described transducer air conditioning under heating mode, 14.5 ℃ 〉=d
1〉=11.5 ℃; 14.5 ℃ 〉=d
2〉=11.5 ℃
The scope of described indoor set coil temperature is :-15 ℃＜=T＜=70 ℃.
technical scheme provided by the invention adopts the difference of two gears to judge, can reduce the probability of erroneous judgement like this, be specifically as follows: when at high wind gear, due to when this gear is worked, for example in the situation that high temperature (general temperature is over 29 ℃) and high humidity (general humidity surpasses 75%), coil temperature is affected higher than the temperature value under normal humidity by the high humility factor, judge iff the difference of using high windscreen, the erroneous judgement of refrigrant leakage just easily appears, and after increasing the difference judgement of minimum windscreen, just can avoid coil temperature to be subjected to the high humility factor to affect the deviation that produces, because prove by experiment, at low wind gear, the coil temperature value is affected by the high humility factor and produces the deviation minimum, so its measurement more can truly reflect the refrigerant amount of air-conditioning, so it has advantages of that the refrigrant leakage erroneous judgement is little.In addition, the present invention utilizes the relative difference of same indoor coil sensor to judge, avoids the erroneous judgement that causes because of the drift of different sensors resistance.In addition, adopt this kind mode can be under two kinds of patterns, namely can judge all whether cold-producing medium leaks under refrigeration or heating mode, so that it has advantages of is applied widely.In addition, the temperature the when indoor coil pipe of participate in judging and indoor environment temperature are always compressor operating, so temperature is what dynamically update, can accomplish whether dynamic detection system exists the problem of secondary refrigerant leakage.When the present invention can be used for detecting operation of air conditioner, whether indoor and outdoor height pressure valve is opened, and in the time of can also detecting heat pump type air conditioner and heat, whether cross valve commutates.
Optionally, above-mentioned d
1And d
3Value can equate (preferably); Certainly in actual conditions, above-mentioned d
1And d
3Value also can be unequal.
Optionally, above-mentioned d
2And d
4Value can equate (preferably); Certainly in actual conditions, above-mentioned d
2And d
4Value also can be unequal.
The specific embodiment of the invention also provides a kind of transducer air conditioning 200, and this transducer air conditioning 200 as shown in Figure 2, comprising:
Acquiring unit 201, for the compressor that obtains transducer air conditioning coiler temperature T in the operation cup;
The first judging unit 203, be used for judgement T and T
1Whether poor absolute value is less than the first temperature threshold d
1, judgement T
C1With T
1Whether poor absolute value is less than the second temperature threshold d
2;
Acquiring unit 201, also be used for obtaining indoor set coil temperature T
2With indoor temperature T
C2
The second judging unit 205, be used for judgement T and T
2Whether poor absolute value is less than the 3rd temperature threshold d
3, judgement T
C2With T
2Whether poor absolute value is less than the 4th temperature threshold d
4;
Described transducer air conditioning under heating mode, 14.5 ℃ 〉=d
1〉=11.5 ℃; 14.5 ℃ 〉=d
2〉=11.5 ℃
The scope of described indoor set coil temperature is :-15 ℃＜=T＜=70 ℃.
Transducer air conditioning provided by the invention has advantages of that False Rate is low.
Optionally, above-mentioned d
1And d
3Value can equate (preferably); Certainly in actual conditions, above-mentioned d
1And d
3Value also can be unequal.
Optionally, above-mentioned d
2And d
4Value can equate (preferably); Certainly in actual conditions, above-mentioned d
2And d
4Value also can be unequal.
The foregoing is only preferred embodiment of the present invention,, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. the decision method of refrigrant leakage in a transducer air conditioning, is characterized in that, described method comprises as follows:
Obtain compressor coiler temperature T in the operation cup of transducer air conditioning;
In the operation of the highest windscreen and compressor operating frequency greater than the first setpoint frequency f
1After, at operation the first setting-up time t
1, obtain indoor set coil temperature T
1With indoor temperature T
C1
Judgement T and T
1Whether poor absolute value is less than the first temperature threshold d
1, judgement T
C1With T
1Whether poor absolute value is less than the second temperature threshold d
2;
At T and T
1Poor absolute value is less than d
1And T
C1With T
1Poor absolute value is less than d
2The time, transducer air conditioning is modulated to minimum wind gear from the highest wind gear;
At minimum wind gear operation the second setting-up time t
2Obtain indoor set coil temperature T
2With indoor temperature T
C2
Judgement T and T
2Whether poor absolute value is less than the 3rd temperature threshold d
3, judgement T
C2With T
2Whether poor absolute value is less than the 4th temperature threshold d
4;
At T and T
2Poor absolute value is less than d
1And T
C2With T
2Poor absolute value is less than d
2The time, the refrigrant leakage of judgement transducer air conditioning, stop compressor operating;
Described transducer air conditioning the refrigeration or dehumidification mode under, 7.5 ℃＜=d
1＜=4.5 ℃; 7.5 ℃＜=d
2＜=4.5 ℃;
Described transducer air conditioning under heating mode, 14.5 ℃ 〉=d
1〉=11.5 ℃; 14.5 ℃ 〉=d
2〉=11.5 ℃
The scope of described indoor set coil temperature is :-15 ℃＜=T＜=70 ℃.
2. method according to claim 1, is characterized in that,
Described the first temperature threshold d
1With described the 3rd temperature threshold d
3Value equate;
Described the second temperature threshold d
2With described the 4th temperature threshold d
4Value equate.
3. a transducer air conditioning, is characterized in that, described transducer air conditioning comprises:
Acquiring unit, for the compressor that obtains transducer air conditioning coiler temperature T in the operation cup;
The operation unit, be used in the highest windscreen operation and compressor operating frequency greater than the first setpoint frequency f
1After, at operation the first setting-up time t
1
Acquiring unit, also be used for obtaining indoor set coil temperature T
1With indoor temperature T
C1
The first judging unit, be used for judgement T and T
1Whether poor absolute value is less than the first temperature threshold d
1, judgement T
C1With T
1Whether poor absolute value is less than the second temperature threshold d
2;
Adjustment unit, be used for going out T and T in described the first judgment unit judges
1Poor absolute value is less than d
1And T
C1With T
1Poor absolute value is less than d
2The time, transducer air conditioning is modulated to minimum wind gear from the highest wind gear;
Described operation unit, also be used at minimum wind gear operation the second setting-up time t
2
Described acquiring unit, also be used for obtaining indoor set coil temperature T
2With indoor temperature T
C2
The second judging unit, be used for judgement T and T
2Whether poor absolute value is less than the 3rd temperature threshold d
3, judgement T
C2With T
2Whether poor absolute value is less than the 4th temperature threshold d
4;
Stop element, be used for described the second judgment unit judges and go out T and T
2Poor absolute value is less than d
1And T
C2With T
2Poor absolute value is less than d
2The time, the refrigrant leakage of judgement transducer air conditioning, stop compressor operating;
Described transducer air conditioning the refrigeration or dehumidification mode under, 7.5 ℃ ≦＜=d
1≦＜=4.5 ℃; 7.5 ℃ ≦＜=d
2≦＜=4.5 ℃;
Described transducer air conditioning under heating mode, 14.5 ℃ 〉=d
1〉=11.5 ℃; 14.5 ℃ 〉=d
2〉=11.5 ℃
The scope of described indoor set coil temperature is :-15 ℃＜=T＜=70 ℃.
4. transducer air conditioning according to claim 3, is characterized in that,
Described the first temperature threshold d
1With described the 3rd temperature threshold d
3Value equate;
Described the second temperature threshold d
2With described the 4th temperature threshold d
4Value equate.
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|---|---|---|---|
| CN201310325935.2A CN103388883B (en) | 2013-07-31 | 2013-07-31 | The decision method of refrigrant leakage and transducer air conditioning in transducer air conditioning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310325935.2A CN103388883B (en) | 2013-07-31 | 2013-07-31 | The decision method of refrigrant leakage and transducer air conditioning in transducer air conditioning |
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| Publication Number | Publication Date |
|---|---|
| CN103388883A true CN103388883A (en) | 2013-11-13 |
| CN103388883B CN103388883B (en) | 2015-12-02 |
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| CN104048798A (en) * | 2014-06-20 | 2014-09-17 | 四川长虹电器股份有限公司 | One-way valve leakage detection method and air conditioner |
| CN104677550A (en) * | 2013-11-26 | 2015-06-03 | 美的集团股份有限公司 | Refrigerant leakage detection method for air conditioning system |
| CN104677551A (en) * | 2013-11-26 | 2015-06-03 | 美的集团股份有限公司 | Refrigerant leakage detection method for air conditioning system |
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