CN103884480A - Refrigerant leak detection method, refrigerant leak detection system and air conditioner - Google Patents
Refrigerant leak detection method, refrigerant leak detection system and air conditioner Download PDFInfo
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Abstract
The invention provides a refrigerant leak detection method, a refrigerant leak detection system and an air conditioner. The refrigerant leak detection method includes the steps of detecting actual operating power of the air conditioner under the current operating condition; obtaining theoretical operating power of the air conditioner under the current operating condition; judging that refrigerants of the air conditioner leak when the actual operating power is lower than the theoretical operating power. According to the technical scheme, whether the refrigerants in the air conditioner leak or not can be accurately detected.
Description
Technical field
The present invention relates to air conditioner technical field, in particular to a kind of coolant leakage detection method, a kind of refrigerant leakage detecting system and a kind of air conditioner.
Background technology
Air conditioner generally includes indoor set and off-premises station two parts, and air-conditioning system comprises compressor, heat interchanger, throttling element and controller etc., and wherein heat interchanger comprises indoor heat exchanger and outdoor heat exchanger.In air-conditioner system, also have refrigerant, the pressure-driven that refrigerant is produced by compressor circulates in whole system, and by and indoor and outdoor surroundings between carry out heat exchange, reach refrigeration or the object that heats.
Air conditioner in use, often there will be the situation that affects air conditioner refrigeration or heat due to coolant leakage.For example, in the time installing an air-conditioner device, if emptying time is long, can cause refrigerant to reduce; If indoor and outdoor high-low pressure connection pipe nut does not have good seal, also can cause the long-term slowly leakage of refrigerant; In addition, other reasons causes that pipeline cracking also can cause coolant leakage etc.
But, whether the air conditioner major part proposing in correlation technique all there is the function of leaking less than automatically detecting refrigerant, even if detect the function of coolant leakage and be provided with, also be to detect according to the degree of superheat of the indoor heat exchanger of air conditioner, in the time that the degree of superheat of indoor heat exchanger departs from preset value, judge that air-conditioner coolant leaks, because this method is not considered the impact of the degree of superheat of indoor and outdoor surroundings temperature on indoor heat exchanger, therefore testing result is inaccurate, and the leakage rate of refrigerant can not be detected exactly.
Whether therefore, how accurately to detect refrigerant in air conditioner occurs to leak and becomes technical matters urgently to be resolved hurrily.
Summary of the invention
The present invention is intended at least solve one of technical matters existing in prior art or correlation technique.
For this reason, one object of the present invention be to propose a kind of refrigerant that can accurately detect in air conditioner whether occur leak coolant leakage detection method.
Another object of the present invention is to have proposed a kind of refrigerant leakage detecting system.
Another object of the present invention is to have proposed a kind of air conditioner.
For achieving the above object, embodiment according to a first aspect of the invention, has proposed a kind of coolant leakage detection method, comprising: detect the actual motion power of air conditioner under work at present condition; Obtain the theoretical operate power of described air conditioner under described work at present condition; In the time that described actual motion power is less than described theoretical operate power, judge that the refrigerant of described air conditioner leaks.
Coolant leakage detection method according to an embodiment of the invention, because air conditioner is in operational process, if condition of work does not change, the operate power of air conditioner is fixed, but in the time there is coolant leakage, the operate power of air conditioner can reduce because compressor load diminishes, therefore, when at air conditioner, the actual motion power under work at present condition is less than theoretical operate power, the refrigerant of judging air conditioner leaks, can in the time that whether the refrigerant that need to judge air conditioner leaks, take into full account that environmental factor (for example, indoor environment temperature and/or outdoor environment temperature) impact on judged result, compare to judge by the actual motion power under identical condition of work and theoretical running temperature, avoid in correlation technique only by the degree of superheat of indoor heat exchanger being judged to the accuracy that affects judged result.Wherein, condition of work includes but not limited to the working voltage of indoor temperature, outdoor temperature, air conditioner, operational mode, the windscreen state of air conditioner etc. of air conditioner.
In addition,, in the time judging that refrigerant occurs to leak, can carry out alarm, to point out in time user to process.
In addition, coolant leakage detection method according to the above embodiment of the present invention, can also have following additional technical characterictic:
According to one embodiment of present invention, the step of the actual motion power of described detection air conditioner under work at present condition, is specially: the real work voltage and the real work electric current that detect described air conditioner; According to actual motion power described in described real work voltage and described real work Current calculation.
Coolant leakage detection method according to an embodiment of the invention, the actual motion power of air conditioner can obtain by calculating the real work voltage of air conditioner and the product of real work electric current.
According to one embodiment of present invention, before obtaining the step of the theoretical operate power of described air conditioner under described work at present condition, also comprise: store the theoretical operate power under every kind of condition of work of described air conditioner in multiple condition of work; The step of obtaining the theoretical operate power of described air conditioner under described work at present condition, is specially: in the theoretical operate power under every kind of condition of work from the described multiple condition of work of having stored, search the theoretical operate power of described air conditioner under described work at present condition.
Coolant leakage detection method according to an embodiment of the invention, as a kind of preferred embodiment, theoretical operate power under can the every kind condition of work of pre-stored air conditioner in multiple condition of work, so that in the time judging according to power under work at present condition, whether air conditioner coolant leakage occurs, directly get the theoretical operate power of air conditioner under work at present condition.
According to one embodiment of present invention, obtain the step of the theoretical operate power of described air conditioner under described work at present condition, be specially: by the computing formula of theoretical operate power, calculate in real time the theoretical operate power of described air conditioner under described work at present condition.
Coolant leakage detection method according to an embodiment of the invention, as another kind of preferred embodiment, can set in advance the formula of the theoretical operate power of calculating air conditioner, so that in the time judging according to power under work at present condition, whether air conditioner coolant leakage occurs, can calculate in real time the theoretical operate power of air conditioner under work at present condition.
According to one embodiment of present invention, also comprise: in the time that the refrigerant of judging described air conditioner occurs to leak, actual motion power according to described air conditioner under described work at present condition, and described air conditioner is under described work at present condition, the theoretical operate power corresponding to different leakage rates of refrigerant, calculates the coolant leakage amount of described air conditioner under described work at present condition.
Coolant leakage detection method according to an embodiment of the invention, by the time that the refrigerant of judging air conditioner occurs to leak, calculates the coolant leakage amount of air conditioner, can notify in time the situation of user's coolant leakage, so that user processes accordingly.In the time calculating the coolant leakage amount of air conditioner, can be by default computing formula, according under work at present condition, the actual motion power of air conditioner, and theoretical operate power corresponding to the different leakage rates of refrigerant calculated, for example, in theoretical operate power corresponding to the different leakage rates of refrigerant, select and immediate two the theoretical operate powers of actual motion power, by the ratio calculation coolant leakage amount between actual motion power and the theoretical operate power selected.Particularly, for example actual motion power is P, and the theoretical operate power of selecting is P1 and P2, and the coolant leakage amount corresponding with P1 is f1, and the coolant leakage amount corresponding with P2 is f2, can pass through formula:
Calculate coolant leakage amount.
According to one embodiment of present invention, before calculating the coolant leakage amount of described air conditioner under described work at present condition, also comprise: store under every kind of condition of work of described air conditioner in multiple condition of work the theoretical operate power corresponding to different leakage rates of refrigerant.
Coolant leakage detection method according to an embodiment of the invention, as a kind of preferred embodiment, can the every kind condition of work of pre-stored air conditioner in multiple condition of work under, the theoretical operate power corresponding to different leakage rates of refrigerant.
According to one embodiment of present invention, before calculating the coolant leakage amount of described air conditioner under described work at present condition, also comprise: the computing formula of the corresponding theoretical operate power of different leakage rates by refrigerant, calculate described air conditioner under described work at present condition, the theoretical operate power that the different leakage rates of refrigerant are corresponding.
Coolant leakage detection method according to an embodiment of the invention, as another kind of preferred embodiment, the computing formula of the corresponding theoretical operate power of different leakage rates that can pre-stored refrigerant, to calculate in real time air conditioner under work at present condition, the theoretical operate power corresponding to different leakage rates of refrigerant.
According to one embodiment of present invention, before whether the refrigerant that judges described air conditioner according to the relation of described actual motion power and described theoretical operate power leaks, also comprise: the working voltage that detects described air conditioner; Judge that described working voltage whether in predetermined voltage range, if so, judges according to the relation of described actual motion power and described theoretical operate power whether the refrigerant of described air conditioner leaks.
Coolant leakage detection method according to an embodiment of the invention, due to air conditioner working voltage in predetermined voltage range time, the operate power of air conditioner is subject to the impact of working voltage less, therefore by the detection of the working voltage to air conditioner, can be only in the time that the working voltage of air conditioner is in zone of reasonableness, just the detection method by the application detects coolant leakage, avoids all detecting coolant leakage under any working voltage condition and causes the inaccurate of testing result.Wherein, predetermined voltage range can be 200V to 240V.
According to one embodiment of present invention, before whether the refrigerant that judges described air conditioner according to the relation of described actual motion power and described theoretical operate power leaks, also comprise: in the predetermined amount of time of described air conditioner start, if detect, the variable quantity of the temperature of the indoor heat exchanger of described air conditioner is more than or equal to predetermined value, directly judges that described air conditioner refrigerant in described predetermined amount of time leaks; If detect, the temperature variation of described indoor heat exchanger is less than predetermined value, directly judges that described air conditioner refrigerant in described predetermined amount of time leaks.
Coolant leakage detection method according to an embodiment of the invention, because air conditioner is in the predetermined amount of time of start, operate power is unstable, therefore can judge whether refrigerant leaks by the temperature variation that detects indoor heat exchanger.In addition, after air conditioner start, the temperature variation of indoor heat exchanger is under refrigeration mode and be different under heating mode, therefore, need to be for different operational modes, corresponding temperature variation threshold value is set respectively and judges.
Embodiment according to a second aspect of the invention, has also proposed a kind of refrigerant leakage detecting system, comprising: power detecting unit, the actual motion power for detection of air conditioner under work at present condition; Acquiring unit, for obtaining the theoretical operate power of described air conditioner under described work at present condition; Processing unit, in the time that described actual motion power is less than described theoretical operate power, judges that the refrigerant of described air conditioner leaks.
Refrigerant leakage detecting system according to an embodiment of the invention, because air conditioner is in operational process, if condition of work does not change, the operate power of air conditioner is fixed, but in the time there is coolant leakage, the operate power of air conditioner can reduce because compressor load diminishes, therefore, when at air conditioner, the actual motion power under work at present condition is less than theoretical operate power, the refrigerant of judging air conditioner leaks, can in the time that whether the refrigerant that need to judge air conditioner leaks, take into full account that environmental factor (for example, indoor environment temperature and/or outdoor environment temperature) impact on judged result, compare to judge by the actual motion power under identical condition of work and theoretical running temperature, avoid in correlation technique only by the degree of superheat of indoor heat exchanger being judged to the accuracy that affects judged result.Wherein, condition of work includes but not limited to the working voltage of indoor temperature, outdoor temperature, air conditioner, operational mode, the windscreen state of air conditioner etc. of air conditioner.
In addition,, in the time judging that refrigerant occurs to leak, can carry out alarm, to point out in time user to process.
According to one embodiment of present invention, described power detecting unit is specifically for the real work voltage and the real work electric current that detect described air conditioner; According to actual motion power described in described real work voltage and described real work Current calculation.
Refrigerant leakage detecting system according to an embodiment of the invention, the actual motion power of air conditioner can obtain by calculating the real work voltage of air conditioner and the product of real work electric current.
According to one embodiment of present invention, also comprise: storage unit, for storing the theoretical operate power of described air conditioner under every kind of condition of work of multiple condition of work; Described acquiring unit specifically for: in the theoretical operate power under every kind of condition of work in the described multiple condition of work of having stored in described storage unit, search the theoretical operate power of described air conditioner under described work at present condition.
Refrigerant leakage detecting system according to an embodiment of the invention, as a kind of preferred embodiment, theoretical operate power under can the every kind condition of work of pre-stored air conditioner in multiple condition of work, so that in the time judging according to power under work at present condition, whether air conditioner coolant leakage occurs, directly get the theoretical operate power of air conditioner under work at present condition.
According to one embodiment of present invention, described acquiring unit specifically for: by the computing formula of theoretical operate power, calculate in real time the theoretical operate power of described air conditioner under described work at present condition.
Refrigerant leakage detecting system according to an embodiment of the invention, as another kind of preferred embodiment, can set in advance the formula of the theoretical operate power of calculating air conditioner, so that in the time judging according to power under work at present condition, whether air conditioner coolant leakage occurs, can calculate in real time the theoretical operate power of air conditioner under work at present condition.
According to one embodiment of present invention, described processing unit also for: judge described air conditioner refrigerant occur leak time, actual motion power according to described air conditioner under described work at present condition, and described air conditioner is under described work at present condition, the theoretical operate power corresponding to different leakage rates of refrigerant, calculates the coolant leakage amount of described air conditioner under described work at present condition.
Refrigerant leakage detecting system according to an embodiment of the invention, by the time that the refrigerant of judging air conditioner occurs to leak, calculates the coolant leakage amount of air conditioner, can notify in time the situation of user's coolant leakage, so that user processes accordingly.In the time calculating the coolant leakage amount of air conditioner, can be by default computing formula, according under work at present condition, the actual motion power of air conditioner, and theoretical operate power corresponding to the different leakage rates of refrigerant calculated, for example, in theoretical operate power corresponding to the different leakage rates of refrigerant, select and immediate two the theoretical operate powers of actual motion power, by the ratio calculation coolant leakage amount between actual motion power and the theoretical operate power selected.Particularly, for example actual motion power is P, and the theoretical operate power of selecting is P1 and P2, and the coolant leakage amount corresponding with P1 is f1, and the coolant leakage amount corresponding with P2 is f2, can pass through formula:
Calculate coolant leakage amount.
According to one embodiment of present invention, also comprise: storage unit, for storing described air conditioner under every kind of condition of work of multiple condition of work, the theoretical operate power that the different leakage rates of refrigerant are corresponding.
Refrigerant leakage detecting system according to an embodiment of the invention, as a kind of preferred embodiment, can the every kind condition of work of pre-stored air conditioner in multiple condition of work under, the theoretical operate power corresponding to different leakage rates of refrigerant.
According to one embodiment of present invention, described processing unit also for: before calculating the coolant leakage amount of described air conditioner under described work at present condition, the computing formula of the corresponding theoretical operate power of different leakage rates by refrigerant, calculate described air conditioner under described work at present condition, the theoretical operate power that the different leakage rates of refrigerant are corresponding.
Refrigerant leakage detecting system according to an embodiment of the invention, as another kind of preferred embodiment, the computing formula of the corresponding theoretical operate power of different leakage rates that can pre-stored refrigerant, to calculate in real time air conditioner under work at present condition, the theoretical operate power corresponding to different leakage rates of refrigerant.
According to one embodiment of present invention, also comprise: judging unit, before whether leaking for the refrigerant that judges described air conditioner at described processing unit according to the relation of described actual motion power and described theoretical operate power, judge that the working voltage of described air conditioner is whether in predetermined voltage range; Described processing unit also when: the working voltage of judging described air conditioner at described judging unit is in predetermined voltage range, judges according to the relation of described actual motion power and described theoretical operate power whether the refrigerant of described air conditioner leaks.
Refrigerant leakage detecting system according to an embodiment of the invention, due to air conditioner working voltage in predetermined voltage range time, the operate power of air conditioner is subject to the impact of working voltage less, therefore by the detection of the working voltage to air conditioner, can be only in the time that the working voltage of air conditioner is in zone of reasonableness, just the detection method by the application detects coolant leakage, avoids all detecting coolant leakage under any working voltage condition and causes the inaccurate of testing result.Wherein, predetermined voltage range can be 200V to 240V.
According to one embodiment of present invention, also comprise: temperature detecting unit, for detection of the temperature of the indoor heat exchanger of described air conditioner; Described processing unit also for: in the predetermined amount of time of described air conditioner start, if described temperature detecting unit detects the variable quantity of the temperature of the indoor heat exchanger of described air conditioner and is more than or equal to predetermined value, directly judge that described air conditioner refrigerant in described predetermined amount of time leaks; If detect, the temperature variation of described indoor heat exchanger is less than predetermined value, directly judges that described air conditioner refrigerant in described predetermined amount of time leaks.
Refrigerant leakage detecting system according to an embodiment of the invention, because air conditioner is in the predetermined amount of time of start, operate power is unstable, therefore can judge whether refrigerant leaks by the temperature variation that detects indoor heat exchanger.In addition, after air conditioner start, the temperature variation of indoor heat exchanger is under refrigeration mode and be different under heating mode, therefore, need to be for different operational modes, corresponding temperature variation threshold value is set respectively and judges.
Embodiment according to a third aspect of the invention we, has also proposed a kind of air conditioner, comprising: the refrigerant leakage detecting system described in above-mentioned any one embodiment.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:
Fig. 1 shows the schematic flow diagram of coolant leakage detection method according to an embodiment of the invention;
Fig. 2 shows the schematic block diagram of refrigerant leakage detecting system according to an embodiment of the invention;
Fig. 3 shows the inner structure schematic diagram of air conditioner according to an embodiment of the invention.
Embodiment
In order more clearly to understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, in the situation that not conflicting, the feature in the application's embodiment and embodiment can combine mutually.
A lot of details are set forth in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not subject to the restriction of following public specific embodiment.
Fig. 1 shows the schematic flow diagram of coolant leakage detection method according to an embodiment of the invention.
As shown in Figure 1, coolant leakage detection method according to an embodiment of the invention, comprising: step 102, detects the actual motion power of air conditioner under work at present condition; Step 104, obtains the theoretical operate power of described air conditioner under described work at present condition; Step 106, in the time that described actual motion power is less than described theoretical operate power, judges that the refrigerant of described air conditioner leaks.
Because air conditioner is in operational process, if condition of work does not change, the operate power of air conditioner is fixed, but in the time there is coolant leakage, the operate power of air conditioner can reduce because compressor load diminishes, therefore, when at air conditioner, the actual motion power under work at present condition is less than theoretical operate power, the refrigerant of judging air conditioner leaks, can in the time that whether the refrigerant that need to judge air conditioner leaks, take into full account that environmental factor (for example, indoor environment temperature and/or outdoor environment temperature) impact on judged result, compare to judge by the actual motion power under identical condition of work and theoretical running temperature, avoid in correlation technique only by the degree of superheat of indoor heat exchanger being judged to the accuracy that affects judged result.Wherein, condition of work includes but not limited to the working voltage of indoor temperature, outdoor temperature, air conditioner, operational mode, the windscreen state of air conditioner etc. of air conditioner.
In addition,, in the time judging that refrigerant occurs to leak, can carry out alarm, to point out in time user to process.
In addition, coolant leakage detection method according to the above embodiment of the present invention, can also have following additional technical characterictic:
According to one embodiment of present invention, the step of the actual motion power of described detection air conditioner under work at present condition, is specially: the real work voltage and the real work electric current that detect described air conditioner; According to actual motion power described in described real work voltage and described real work Current calculation.
The actual motion power of air conditioner can obtain by calculating the real work voltage of air conditioner and the product of real work electric current.
Obtaining the theoretical operate power of air conditioner under described work at present condition can have several different methods, below enumerates two kinds of embodiments wherein:
Embodiment one:
According to one embodiment of present invention, before obtaining the step of the theoretical operate power of described air conditioner under described work at present condition, also comprise: store the theoretical operate power under every kind of condition of work of described air conditioner in multiple condition of work; The step of obtaining the theoretical operate power of described air conditioner under described work at present condition, is specially: in the theoretical operate power under every kind of condition of work from the described multiple condition of work of having stored, search the theoretical operate power of described air conditioner under described work at present condition.
As a kind of preferred embodiment, theoretical operate power under can the every kind condition of work of pre-stored air conditioner in multiple condition of work, so that in the time judging according to power under work at present condition, whether air conditioner coolant leakage occurs, directly get the theoretical operate power of air conditioner under work at present condition.
Embodiment two:
According to one embodiment of present invention, obtain the step of the theoretical operate power of described air conditioner under described work at present condition, be specially: by the computing formula of theoretical operate power, calculate in real time the theoretical operate power of described air conditioner under described work at present condition.
As another kind of preferred embodiment, can set in advance the formula of the theoretical operate power of calculating air conditioner, so that in the time judging according to power under work at present condition, whether air conditioner coolant leakage occurs, can calculate in real time the theoretical operate power of air conditioner under work at present condition.
Particularly, in the situation that other conditions of work are certain, 1 DEG C of the every variation of outdoor environment temperature, the operate power changing value of air conditioner is A.1 DEG C of the every variation of indoor environment temperature, the operate power changing value of air conditioner is B.
Being operated in refrigeration mode taking air conditioner below describes as example:
Under refrigeration mode, 1 DEG C of the every rising of outdoor environment temperature, the operate power rising AW of air conditioner; 1 DEG C of the every reduction of outdoor environment temperature, the operate power of air conditioner reduces AW; 1 DEG C of the every rising of indoor environment temperature, the operate power rising BW of air conditioner, 1 DEG C of the every reduction of indoor environment temperature, the operate power of air conditioner reduces BW.
In order to determine A value, need, in the situation that keeping indoor environment temperature constant, change outdoor environment temperature, to determine A value according to rule, similarly, in order to determine B, need, in the situation that holding chamber external environment is temperature-resistant, change indoor environment temperature, to determine B according to rule.
In sum, for specific air conditioner, if determined the operate power under reference operating condition, can calculate the theoretical operate power of air conditioner under any condition of work by following formula:
Can calculate the theoretical operate power of air conditioner under different operating condition according to above formula.
Wherein, reference operating condition can be as the criterion with specified cooling condition, i.e. 35 DEG C of outdoor dry-bulb temperatures, 24 DEG C of wet-bulb temperature; 27 DEG C of Indoor Dry bulb temperatures, 19 DEG C of wet-bulb temperature.
Particularly, under specified cooling condition, obtain the theoretical operate power P of air conditioner by test
s=1089W, is 27 DEG C if maintain Indoor Dry bulb temperature, and wet-bulb temperature is 19 DEG C, obtains following data:
In the time that outdoor dry-bulb temperature is 30 DEG C, the theoretical operate power of air conditioner is 1025W;
In the time that outdoor dry-bulb temperature is 35 DEG C, the theoretical operate power of air conditioner is 1089W;
In the time that outdoor dry-bulb temperature is 43 DEG C, the theoretical operate power of air conditioner is 1168W;
In the time that outdoor dry-bulb temperature is 46 DEG C, the theoretical operate power of air conditioner is 1204W;
Can draw according to above data, 1 DEG C of the every variation of outdoor environment temperature, the operate power of air conditioner approximately changes 11W, and therefore A can value be 11.Similarly, can determine that B value is 14.
Can calculate the theoretical operate power of air conditioner under any condition of work by following formula:
△P=1089+11×(T
out-35)+14×(T
in-27)。
Certainly, also can determine that by above method air conditioner is in the time that heating mode moves, the computing formula of the theoretical operate power under condition of work arbitrarily, it should be noted that, when air conditioner is in the time that heating mode moves, reference operating condition in formula can be as the criterion with specified heating condition, i.e. 7 DEG C of outdoor dry-bulb temperatures, 6 DEG C of wet-bulb temperature; 20 DEG C of Indoor Dry bulb temperatures, 15 DEG C of wet-bulb temperature.
According to one embodiment of present invention, also comprise: in the time that the refrigerant of judging described air conditioner occurs to leak, actual motion power according to described air conditioner under described work at present condition, and described air conditioner is under described work at present condition, the theoretical operate power corresponding to different leakage rates of refrigerant, calculates the coolant leakage amount of described air conditioner under described work at present condition.
By in the time that the refrigerant of judging air conditioner occurs to leak, calculate the coolant leakage amount of air conditioner, can notify in time the situation of user's coolant leakage, so that user processes accordingly.In the time calculating the coolant leakage amount of air conditioner, can be by default computing formula, according under work at present condition, the actual motion power of air conditioner, and theoretical operate power corresponding to the different leakage rates of refrigerant calculated, for example, in theoretical operate power corresponding to the different leakage rates of refrigerant, select and immediate two the theoretical operate powers of actual motion power, by the ratio calculation coolant leakage amount between actual motion power and the theoretical operate power selected.
According to one embodiment of present invention, before calculating the coolant leakage amount of described air conditioner under described work at present condition, also comprise: store under every kind of condition of work of described air conditioner in multiple condition of work the theoretical operate power corresponding to different leakage rates of refrigerant.
As a kind of preferred embodiment, can the every kind condition of work of pre-stored air conditioner in multiple condition of work under, the theoretical operate power corresponding to different leakage rates of refrigerant.
According to one embodiment of present invention, before calculating the coolant leakage amount of described air conditioner under described work at present condition, also comprise: the computing formula of the corresponding theoretical operate power of different leakage rates by refrigerant, calculate described air conditioner under described work at present condition, the theoretical operate power that the different leakage rates of refrigerant are corresponding.
Coolant leakage detection method according to an embodiment of the invention, as another kind of preferred embodiment, the computing formula of the corresponding theoretical operate power of different leakage rates that can pre-stored refrigerant, to calculate in real time air conditioner under work at present condition, the theoretical operate power corresponding to different leakage rates of refrigerant.
Continue to be below operated in refrigeration mode as example describes taking air conditioner, be determined by experiment, under reference operating condition,
When coolant leakage 10%, when f1=10%, the theoretical operate power of air conditioner is P1, theoretical operate power Δ P1=P1+11 × (Tout-35)+14 under condition of work arbitrarily × (Tin-27);
When coolant leakage 20%, when f2=20%, the theoretical operate power of air conditioner is P2, theoretical operate power Δ P2=P2+11 × (Tout-35)+14 under condition of work arbitrarily × (Tin-27);
When coolant leakage 30%, when f3=30%, the theoretical operate power of air conditioner is P3, theoretical operate power Δ P3=P3+11 × (Tout-35)+14 under condition of work arbitrarily × (Tin-27);
When coolant leakage 40%, when f4=40%, the theoretical operate power of air conditioner is P4, theoretical operate power Δ P4=P4+11 × (Tout-35)+14 under condition of work arbitrarily × (Tin-27);
When coolant leakage 50%, when f5=50%, the theoretical operate power of air conditioner is P5, theoretical operate power Δ P5=P5+11 × (Tout-35)+14 under condition of work arbitrarily × (Tin-27);
Calculate as coolant leakage n% successively, when fn=n%, the theoretical operate power of air conditioner is Pn, theoretical operate power Δ Pn=Pn+11 × (Tout-35)+14 under condition of work arbitrarily × (Tin-27).
Secondly, relatively the actual motion power P of air conditioner and P1, to the size of Pn, if P is between Pn and Pn+1, can determine that coolant leakage amount is also between fn and fn+1, can calculate by following formula:
F=(Pn-P) × (fn+1-fn)/(Pn-Pn+1)+fn; Theoretical power value corresponding to visible different coolant leakage amount is more, and result of calculation is also more accurate.
Particularly, once row illustrate for two example two:
Embodiment mono-:
Under specified cooling condition, obtain following data by test:
When coolant leakage 10%, when f1=10%, theoretical operate power P1=1026W;
When coolant leakage 20%, when f2=20%, theoretical operate power P2=950W;
When coolant leakage 30%, when f3=30%, theoretical operate power P3=836;
When coolant leakage 40%, when f4=40%, theoretical operate power P4=726;
When coolant leakage 50%, when f5=50%, theoretical operate power P5=663.
If when air conditioner moves under specified cooling condition, by detecting running current and the working voltage of air conditioner, draw the actual motion power P=990W of air conditioner, and known according to the computing formula of the theoretical operate power of above-mentioned air conditioner, under specified cooling condition:
Δ P=1089+11 × (35-35)+14 × (27-27)=1089W, under standard condition, the theoretical operate power of air conditioner is 1089W, because actual motion power is less than theoretical operate power, therefore can judge the coolant leakage of air conditioner.
By comparing the size of P and P1～P5, determine that P is between P1 and P2, can obtain according to formula f=(Pn-P) × (fn+1-fn)/(Pn-Pn+1)+fn:
Coolant leakage amount f=(P1-P) × (f2-f1)/(P1-P2)+f1=(1026-990) × (20%-10%)/(the 1026-950)+10%=14.7% of air conditioner, the coolant leakage amount of air conditioner is 14.7%.
Embodiment bis-:
If air conditioner is 40 DEG C at outdoor environment, indoor is while moving under the condition of work of 25 DEG C, by detecting running current and working voltage, draw current actual motion power P=850W, and according to formula, the theoretical operate power under this condition of work is:
ΔP=1089+11×（40-35）+14×（25-27）=1116W
By comparing actual motion power P ' and theoretical operate power, can judge the coolant leakage of air conditioner, because this condition of work is non-specified cooling condition, therefore, can obtain according to the computing formula of above-mentioned theory operate power, the in the situation that of different coolant leakage amount, the theoretical operate power of air conditioner is:
ΔP1=P1+11×（Tout-35）+14×（Tin-27）=1026+11×（40-35）+14×（25-27）=1053W；
ΔP2=P2+11×（Tout-35）+14×（Tin-27）=950+11×（40-35）+14×（25-27）=977W；
ΔP3=P3+11×（Tout-35）+14×（Tin-27）=836+11×（40-35）+14×（25-27）=861W；
ΔP4=P4+11×（Tout-35）+14×（Tin-27）=726+11×（40-35）+14×（25-27）=753W；
ΔP5=P5+11×（Tout-35）+14×（Tin-27）=663+11×（40-35）+14×（25-27）=690W；
Due to the actual motion power P=850W of air conditioner, therefore, by comparing the size of P and Δ P1～Δ P5, determine that P is between Δ P3 and Δ P4, can obtain according to formula f=(Pn-P) × (fn+1-fn)/(Pn-Pn+1)+fn:
F=(Δ P3-P) × (f4-f3)/(Δ P3-Δ P4)+f3=(861-850) × (40%-30%)/(861-753)+30%=31%, therefore, can determine that coolant leakage amount is 31%.
According to one embodiment of present invention, before whether the refrigerant that judges described air conditioner according to the relation of described actual motion power and described theoretical operate power leaks, also comprise: the working voltage that detects described air conditioner; Judge that described working voltage whether in predetermined voltage range, if so, judges according to the relation of described actual motion power and described theoretical operate power whether the refrigerant of described air conditioner leaks.
Due to air conditioner working voltage in predetermined voltage range time, the operate power of air conditioner is subject to the impact of working voltage less, therefore by the detection of the working voltage to air conditioner, can be only in the time that the working voltage of air conditioner is in zone of reasonableness, just the detection method by the application detects coolant leakage, avoids all detecting coolant leakage under any working voltage condition and causes the inaccurate of testing result.Wherein, predetermined voltage range can be 200V to 240V.
According to one embodiment of present invention, before whether the refrigerant that judges described air conditioner according to the relation of described actual motion power and described theoretical operate power leaks, also comprise: in the predetermined amount of time of described air conditioner start, if detect, the variable quantity of the temperature of the indoor heat exchanger of described air conditioner is more than or equal to predetermined value, directly judges that described air conditioner refrigerant in described predetermined amount of time leaks; If detect, the temperature variation of described indoor heat exchanger is less than predetermined value, directly judges that described air conditioner refrigerant in described predetermined amount of time leaks.
For example, because air conditioner is in the predetermined amount of time (5 minutes) of start, operate power is unstable, therefore can judge whether refrigerant leaks by the temperature variation that detects indoor heat exchanger.In addition, after air conditioner start, the temperature variation of indoor heat exchanger is under refrigeration mode and be different under heating mode, therefore, need to be for different operational modes, corresponding temperature variation threshold value is set respectively and judges.For example, can be arranged under refrigeration mode, temperature variation threshold value is 5 DEG C.
Fig. 2 shows the schematic block diagram of refrigerant leakage detecting system according to an embodiment of the invention.
As shown in Figure 2, refrigerant leakage detecting system 200 according to an embodiment of the invention, comprising: power detecting unit 202, the actual motion power for detection of air conditioner under work at present condition; Acquiring unit 204, for obtaining the theoretical operate power of described air conditioner under described work at present condition; Processing unit 206, in the time that described actual motion power is less than described theoretical operate power, judges that the refrigerant of described air conditioner leaks.
Because air conditioner is in operational process, if condition of work does not change, the operate power of air conditioner is fixed, but in the time there is coolant leakage, the operate power of air conditioner can reduce because compressor load diminishes, therefore, when at air conditioner, the actual motion power under work at present condition is less than theoretical operate power, the refrigerant of judging air conditioner leaks, can in the time that whether the refrigerant that need to judge air conditioner leaks, take into full account that environmental factor (for example, indoor environment temperature and/or outdoor environment temperature) impact on judged result, compare to judge by the actual motion power under identical condition of work and theoretical running temperature, avoid in correlation technique only by the degree of superheat of indoor heat exchanger being judged to the accuracy that affects judged result.Wherein, condition of work includes but not limited to the working voltage of indoor temperature, outdoor temperature, air conditioner, operational mode, the windscreen state of air conditioner etc. of air conditioner.
In addition,, in the time judging that refrigerant occurs to leak, can carry out alarm, to point out in time user to process.
According to one embodiment of present invention, described power detecting unit 202 is specifically for the real work voltage and the real work electric current that detect described air conditioner; According to actual motion power described in described real work voltage and described real work Current calculation.
The actual motion power of air conditioner can obtain by calculating the real work voltage of air conditioner and the product of real work electric current.
According to one embodiment of present invention, also comprise: storage unit 208, for storing the theoretical operate power of described air conditioner under every kind of condition of work of multiple condition of work; Described acquiring unit 204 specifically for: in the theoretical operate power under every kind of condition of work in the described multiple condition of work of having stored in described storage unit 208, search the theoretical operate power of described air conditioner under described work at present condition.
As a kind of preferred embodiment, theoretical operate power under can the every kind condition of work of pre-stored air conditioner in multiple condition of work, so that in the time judging according to power under work at present condition, whether air conditioner coolant leakage occurs, directly get the theoretical operate power of air conditioner under work at present condition.
According to one embodiment of present invention, described acquiring unit 204 specifically for: by the computing formula of theoretical operate power, calculate in real time the theoretical operate power of described air conditioner under described work at present condition.
As another kind of preferred embodiment, can set in advance the formula of the theoretical operate power of calculating air conditioner, so that in the time judging according to power under work at present condition, whether air conditioner coolant leakage occurs, can calculate in real time the theoretical operate power of air conditioner under work at present condition.
According to one embodiment of present invention, described processing unit 206 also for: judge described air conditioner refrigerant occur leak time, actual motion power according to described air conditioner under described work at present condition, and described air conditioner is under described work at present condition, the theoretical operate power corresponding to different leakage rates of refrigerant, calculates the coolant leakage amount of described air conditioner under described work at present condition.
By in the time that the refrigerant of judging air conditioner occurs to leak, calculate the coolant leakage amount of air conditioner, can notify in time the situation of user's coolant leakage, so that user processes accordingly.In the time calculating the coolant leakage amount of air conditioner, can be by default computing formula, according under work at present condition, the actual motion power of air conditioner, and theoretical operate power corresponding to the different leakage rates of refrigerant calculated, for example, in theoretical operate power corresponding to the different leakage rates of refrigerant, select and immediate two the theoretical operate powers of actual motion power, by the ratio calculation coolant leakage amount between actual motion power and the theoretical operate power selected.Particularly, for example actual motion power is P, and the theoretical operate power of selecting is P1 and P2, and the coolant leakage amount corresponding with P1 is f1, and the coolant leakage amount corresponding with P2 is f2, can pass through formula:
Calculate coolant leakage amount.
According to one embodiment of present invention, also comprise: storage unit 208, for storing described air conditioner under every kind of condition of work of multiple condition of work, the theoretical operate power that the different leakage rates of refrigerant are corresponding.
As a kind of preferred embodiment, can the every kind condition of work of pre-stored air conditioner in multiple condition of work under, the theoretical operate power corresponding to different leakage rates of refrigerant.
According to one embodiment of present invention, described processing unit 206 also for: before calculating the coolant leakage amount of described air conditioner under described work at present condition, the computing formula of the corresponding theoretical operate power of different leakage rates by refrigerant, calculate described air conditioner under described work at present condition, the theoretical operate power that the different leakage rates of refrigerant are corresponding.
As another kind of preferred embodiment, the computing formula of the corresponding theoretical operate power of different leakage rates that can pre-stored refrigerant, to calculate in real time air conditioner under work at present condition, the theoretical operate power corresponding to different leakage rates of refrigerant.
According to one embodiment of present invention, also comprise: judging unit 210, before whether leaking for the refrigerant that judges described air conditioner at described processing unit according to the relation of described actual motion power and described theoretical operate power, judge that the working voltage of described air conditioner is whether in predetermined voltage range; Described processing unit 206 also when: the working voltage of judging described air conditioner at described judging unit 210 is in predetermined voltage range, judges according to the relation of described actual motion power and described theoretical operate power whether the refrigerant of described air conditioner leaks.
Due to air conditioner working voltage in predetermined voltage range time, the operate power of air conditioner is subject to the impact of working voltage less, therefore by the detection of the working voltage to air conditioner, can be only in the time that the working voltage of air conditioner is in zone of reasonableness, just the detection method by the application detects coolant leakage, avoids all detecting coolant leakage under any working voltage condition and causes the inaccurate of testing result.Wherein, predetermined voltage range can be 200V to 240V.
According to one embodiment of present invention, also comprise: temperature detecting unit 212, for detection of the temperature of the indoor heat exchanger of described air conditioner; Described processing unit 206 also for: in the predetermined amount of time of described air conditioner start, if described temperature detecting unit 212 detects that the variable quantity of the temperature of the indoor heat exchanger of described air conditioner is more than or equal to predetermined value, directly judge that described air conditioner refrigerant in described predetermined amount of time leaks; If detect, the temperature variation of described indoor heat exchanger is less than predetermined value, directly judges that described air conditioner refrigerant in described predetermined amount of time leaks.
Because air conditioner is in the predetermined amount of time of start, operate power is unstable, therefore can judge whether refrigerant leaks by the temperature variation that detects indoor heat exchanger.In addition, after air conditioner start, the temperature variation of indoor heat exchanger is under refrigeration mode and be different under heating mode, therefore, need to be for different operational modes, corresponding temperature variation threshold value is set respectively and judges.
Fig. 3 shows the inner structure schematic diagram of air conditioner according to an embodiment of the invention.
As shown in Figure 3, air conditioner 300 according to an embodiment of the invention, comprising: the refrigerant leakage detecting system shown in Fig. 2 (not shown in Fig. 3); Compressor 302; Four-way change-over valve 304; Outdoor heat exchanger 306; Restriction device 308; Indoor heat exchanger 310; Outdoor temperature sensor 312, for detection of outdoor temperature; Indoor temperature transmitter 316, for detection of indoor temperature; And indoor heat exchanger temperature sensor 314, for detection of the temperature of indoor heat exchanger.
Wherein, refrigerant enters in outdoor heat exchanger 306 by four-way change-over valve 304 after the pressure of compressor 302, by entering indoor heat exchanger 310 by restriction device 308 after outdoor heat exchanger 306, after indoor heat exchanger 310, be back to compressor 302 through four-way change-over valve 304.
More than be described with reference to the accompanying drawings technical scheme of the present invention, consider whether the air conditioner major part proposing in correlation technique all less than automatically detecting refrigerant, the function of leaking occurs, even if detect the function of coolant leakage and be provided with, also be to detect according to the degree of superheat of the indoor heat exchanger of air conditioner, in the time that the degree of superheat of indoor heat exchanger departs from preset value, judge that air-conditioner coolant leaks, because this method is not considered the impact of the degree of superheat of indoor and outdoor surroundings temperature on indoor heat exchanger, therefore testing result is inaccurate, and the leakage rate of refrigerant can not be detected exactly.Therefore, the present invention proposes a kind of new coolant leakage detection scheme, can in the time that whether the refrigerant that need to judge air conditioner leaks, take into full account that environmental factor (for example, indoor environment temperature and/or outdoor environment temperature) impact on judged result, compare to judge by the actual motion power under identical condition of work and theoretical running temperature, avoided in correlation technique only by the degree of superheat of indoor heat exchanger being judged to the accuracy that affects judged result.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (19)
1. a coolant leakage detection method, is characterized in that, comprising:
Detect the actual motion power of air conditioner under work at present condition;
Obtain the theoretical operate power of described air conditioner under described work at present condition;
In the time that described actual motion power is less than described theoretical operate power, judge that the refrigerant of described air conditioner leaks.
2. coolant leakage detection method according to claim 1, is characterized in that, the step of the actual motion power of described detection air conditioner under work at present condition, is specially:
Detect real work voltage and the real work electric current of described air conditioner;
According to actual motion power described in described real work voltage and described real work Current calculation.
3. coolant leakage detection method according to claim 1, is characterized in that, before obtaining the step of the theoretical operate power of described air conditioner under described work at present condition, also comprises:
Store the theoretical operate power under every kind of condition of work of described air conditioner in multiple condition of work;
The step of obtaining the theoretical operate power of described air conditioner under described work at present condition, is specially:
In theoretical operate power under every kind of condition of work from the described multiple condition of work of having stored, search the theoretical operate power of described air conditioner under described work at present condition.
4. coolant leakage detection method according to claim 1, is characterized in that, obtains the step of the theoretical operate power of described air conditioner under described work at present condition, is specially:
By the computing formula of theoretical operate power, calculate in real time the theoretical operate power of described air conditioner under described work at present condition.
5. coolant leakage detection method according to claim 1, is characterized in that, also comprises:
In the time that the refrigerant of judging described air conditioner occurs to leak, actual motion power according to described air conditioner under described work at present condition, and described air conditioner is under described work at present condition, the theoretical operate power corresponding to different leakage rates of refrigerant, calculates the coolant leakage amount of described air conditioner under described work at present condition.
6. the detection method of coolant leakage according to claim 5, is characterized in that, before calculating the coolant leakage amount of described air conditioner under described work at present condition, also comprises:
Store under every kind of condition of work of described air conditioner in multiple condition of work the theoretical operate power corresponding to different leakage rates of refrigerant.
7. the detection method of coolant leakage according to claim 5, is characterized in that, before calculating the coolant leakage amount of described air conditioner under described work at present condition, also comprises:
The computing formula of the corresponding theoretical operate power of different leakage rates by refrigerant, calculates described air conditioner under described work at present condition, the theoretical operate power that the different leakage rates of refrigerant are corresponding.
8. according to the detection method of the coolant leakage described in any one in claim 1 to 7, it is characterized in that, before whether the refrigerant that judges described air conditioner according to the relation of described actual motion power and described theoretical operate power leaks, also comprise:
Detect the working voltage of described air conditioner;
Judge that described working voltage whether in predetermined voltage range, if so, judges according to the relation of described actual motion power and described theoretical operate power whether the refrigerant of described air conditioner leaks.
9. according to the detection method of the coolant leakage described in any one in claim 1 to 7, it is characterized in that, before whether the refrigerant that judges described air conditioner according to the relation of described actual motion power and described theoretical operate power leaks, also comprise:
In the predetermined amount of time of described air conditioner start, if detect, the variable quantity of the temperature of the indoor heat exchanger of described air conditioner is more than or equal to predetermined value, directly judges that described air conditioner refrigerant in described predetermined amount of time leaks; If detect, the temperature variation of described indoor heat exchanger is less than predetermined value, directly judges that described air conditioner refrigerant in described predetermined amount of time leaks.
10. a refrigerant leakage detecting system, is characterized in that, comprising:
Power detecting unit, the actual motion power for detection of air conditioner under work at present condition;
Acquiring unit, for obtaining the theoretical operate power of described air conditioner under described work at present condition;
Processing unit, in the time that described actual motion power is less than described theoretical operate power, judges that the refrigerant of described air conditioner leaks.
11. refrigerant leakage detecting systems according to claim 10, is characterized in that, described power detecting unit specifically for:
Detect real work voltage and the real work electric current of described air conditioner;
According to actual motion power described in described real work voltage and described real work Current calculation.
12. refrigerant leakage detecting systems according to claim 10, is characterized in that, also comprise:
Storage unit, for storing the theoretical operate power of described air conditioner under every kind of condition of work of multiple condition of work;
Described acquiring unit specifically for:
In theoretical operate power under every kind of condition of work in the described multiple condition of work of having stored in described storage unit, search the theoretical operate power of described air conditioner under described work at present condition.
13. refrigerant leakage detecting systems according to claim 10, is characterized in that, described acquiring unit specifically for:
By the computing formula of theoretical operate power, calculate in real time the theoretical operate power of described air conditioner under described work at present condition.
14. refrigerant leakage detecting systems according to claim 10, is characterized in that, described processing unit also for:
In the time that the refrigerant of judging described air conditioner occurs to leak, actual motion power according to described air conditioner under described work at present condition, and described air conditioner is under described work at present condition, the theoretical operate power corresponding to different leakage rates of refrigerant, calculates the coolant leakage amount of described air conditioner under described work at present condition.
15. refrigerant leakage detecting systems according to claim 14, is characterized in that, also comprise:
Storage unit, for storing described air conditioner under every kind of condition of work of multiple condition of work, the theoretical operate power corresponding to different leakage rates of refrigerant.
16. refrigerant leakage detecting systems according to claim 14, is characterized in that, described processing unit also for:
Before calculating the coolant leakage amount of described air conditioner under described work at present condition, the computing formula of the corresponding theoretical operate power of different leakage rates by refrigerant, calculate described air conditioner under described work at present condition, the theoretical operate power that the different leakage rates of refrigerant are corresponding.
17. according to claim 10 to the refrigerant leakage detecting system described in any one in 16, it is characterized in that, also comprises:
Judging unit, before judging according to the relation of described actual motion power and described theoretical operate power at described processing unit whether the refrigerant of described air conditioner leaks, judges that the working voltage of described air conditioner is whether in predetermined voltage range;
Described processing unit also when: the working voltage of judging described air conditioner at described judging unit is in predetermined voltage range, judges according to the relation of described actual motion power and described theoretical operate power whether the refrigerant of described air conditioner leaks.
18. according to claim 10 to the refrigerant leakage detecting system described in any one in 16, it is characterized in that, also comprises:
Temperature detecting unit, for detection of the temperature of the indoor heat exchanger of described air conditioner;
Described processing unit also for: in the predetermined amount of time of described air conditioner start, if described temperature detecting unit detects the variable quantity of the temperature of the indoor heat exchanger of described air conditioner and is more than or equal to predetermined value, directly judge that described air conditioner refrigerant in described predetermined amount of time leaks; If detect, the temperature variation of described indoor heat exchanger is less than predetermined value, directly judges that described air conditioner refrigerant in described predetermined amount of time leaks.
19. 1 kinds of air conditioners, is characterized in that, comprising: the refrigerant leakage detecting system as described in any one in claim 10 to 18.
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