CN103940560A - Refrigerant leakage detecting method and system and air conditioner - Google Patents

Refrigerant leakage detecting method and system and air conditioner Download PDF

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Publication number
CN103940560A
CN103940560A CN201410143951.4A CN201410143951A CN103940560A CN 103940560 A CN103940560 A CN 103940560A CN 201410143951 A CN201410143951 A CN 201410143951A CN 103940560 A CN103940560 A CN 103940560A
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China
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heat exchanger
difference
indoor heat
air conditioner
predetermined threshold
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CN103940560B (en
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吴加生
褚永
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GD Midea Air Conditioning Equipment Co Ltd
Guangdong Midea Group Wuhu Air Conditioning Equipment Co Ltd
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Guangdong Midea Refrigeration Equipment Co Ltd
Guangdong Midea Group Wuhu Air Conditioning Equipment Co Ltd
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Publication of CN103940560A publication Critical patent/CN103940560A/en
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Abstract

The invention provides a refrigerant leakage detecting method and system and an air conditioner. The method includes the steps that the first indoor air inlet temperature of an inlet of an indoor heat exchanger of the air conditioner and the first indoor heat exchanger temperature of the indoor heat exchanger are detected after a compressor of the air conditioner runs for a first set period of time; when the first difference between the first indoor air inlet temperature and the first indoor heat exchanger temperature is smaller than or equal to a first preset threshold, the second indoor air inlet temperature of the inlet of the indoor heat exchanger and the second indoor heat exchanger temperature of the indoor heat exchanger are detected after the compressor runs for a second preset period of time; when the second difference between the second indoor air inlet temperature and the second indoor heat exchanger temperature is smaller than or equal to the first preset threshold, whether variation of the second difference relative to the first difference is smaller than or equal to a second preset threshold or not is judged, and if yes, refrigerant leakage is judged to happen to the air conditioner. According to the technical scheme, refrigerant leakage of the air conditioner can be accurately detected in time.

Description

Coolant leakage detection method, refrigerant leakage detecting system and air conditioner
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 system comprises compressor, outdoor heat exchanger, restriction device, indoor heat exchanger etc.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.In the situation that refrigerant does not leak, air-conditioner system can normally freeze.But, if there is coolant leakage because the reasons such as vibration cause system pipeline when air conditioner installation is lack of standardization or the later stage moves, can reduce the refrigeration of air-conditioner system.
When coolant leakage is serious, because environment temperature is higher, cause compressor exhaust temperature to rise very fast.If can not process in time, can reduce the serviceable life of compressor, even burn compressor.And the coolant leakage detection method proposing in correlation technique (such as surpassing 40%) normally when coolant leakage amount is higher just can detect, and for the lower situation of coolant leakage amount, coolant leakage can not be detected exactly, can cause air conditioner with less coolant quantity, to carry out work for a long time, affect the serviceable life of compressor.
Whether the refrigerant that therefore, how to detect exactly air conditioner occurs to leak 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 has been to propose the refrigerant detection method whether a kind of refrigerant that can detect exactly air conditioner leakage occurs.
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, a kind of coolant leakage detection method has been proposed, comprise: the first detecting step, at the compressor operating of air conditioner, after first schedule time, detect the first indoor EAT of indoor heat exchanger inflow point and the first indoor heat exchanger temperature of described indoor heat exchanger of described air conditioner; The second detecting step, when the first difference of described the first indoor EAT and described the first indoor heat exchanger temperature is less than or equal to the first predetermined threshold, detect described compressor operating after second schedule time, the second indoor EAT of described indoor heat exchanger inflow point and the second indoor heat exchanger temperature of described indoor heat exchanger; Determining step, when the second difference of described the second indoor EAT and described the second indoor heat exchanger temperature is less than or equal to described the first predetermined threshold, judge whether described the second difference is less than or equal to the second predetermined threshold with respect to the variable quantity of described the first difference, if so, the refrigerant of judging described air conditioner leaks.
Coolant leakage detection method according to an embodiment of the invention, while leaking due to the refrigerant of air conditioner, under refrigeration or dehumidification mode, between the temperature of indoor heat exchanger inflow point (being indoor EAT) and the temperature of indoor heat exchanger, there is the larger temperature difference, and when coolant leakage, directly have influence on the temperature of indoor heat exchanger, the temperature that is indoor heat exchanger is higher when not leaking, therefore can judge by the relation between the temperature of indoor heat exchanger inflow point and the temperature of indoor heat exchanger whether the refrigerant of air conditioner changes, and whether the refrigerant that air conditioner can be detected in time leaks.
And double when the indoor EAT of indoor heat exchanger inflow point and the temperature difference of indoor heat exchanger being detected and being all less than or equal to predetermined value by first and second schedule times at compressor operating, the difference that compares twice testing result, and at the variable quantity of the difference of twice testing result hour, the refrigerant of judging air conditioner leaks, make to carry out synthetic determination according to the result of twice detection, improve accuracy, avoided (in the certain hour section such as air conditioner start) erroneous judgement when air conditioner fluctuation of service simultaneously.In addition, by the temperature difference of indoor EAT and indoor heat exchanger, judge, also reduced to the full extent the detection error of temperature sensor.
In addition,, when the refrigerant of judging air conditioner 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, also comprise: if judge, described the second difference is less than or equal to described the second predetermined threshold with respect to the variable quantity of described the first difference, controlling described compressor reruned after the 3rd schedule time out of service, and described the first detecting step, described the second detecting step and described determining step are carried out in continuation, until the number of times that described the second difference is less than or equal to described the second predetermined threshold with respect to the variable quantity of described the first difference while reaching pre-determined number, judges that the refrigerant of described air conditioner leaks.
Coolant leakage detection method according to an embodiment of the invention, by repeatedly judging that above-mentioned the second difference is with respect to the relation of variable quantity and the predetermined threshold of the first difference, can improve the accuracy of judged result, impact result of determination being caused to eliminate accidentalia.
According to one embodiment of present invention, before carrying out described the first detecting step, also comprise: obtain the operational mode of described air conditioner, and when described operational mode is refrigeration mode or dehumidification mode, carry out described the first detecting step.
According to one embodiment of present invention, described first schedule time is 2 minutes, and described second schedule time is 3 minutes, and described the 3rd schedule time is 3 minutes.
Coolant leakage detection method according to an embodiment of the invention, by first schedule time was set, it is 2 minutes, make the operation that both can guarantee compressor in more stable state, can to the refrigerant of air conditioner, whether occur to leak quickly again and detect, avoid, when refrigerant occurs to leak, because detection time is long, causing the temperature of compressor in higher level, to affect the serviceable life of compressor always.
According to one embodiment of present invention, described the first predetermined threshold is in the scope of 5 ℃ to 15 ℃, and described the second predetermined threshold is in the scope of 0 ℃ to 2 ℃.
According to one embodiment of present invention, described the first predetermined threshold is 10 ℃, and described the second predetermined threshold is 1 ℃.
According to one embodiment of present invention, described pre-determined number is 3 times.Certainly, pre-determined number can be also 4 times, 5 times or other number of times.
According to the embodiment of second aspect present invention, a kind of refrigerant leakage detecting system has also been proposed, comprise: detecting unit, for at the compressor operating of air conditioner after first schedule time, detect the first indoor EAT of indoor heat exchanger inflow point and the first indoor heat exchanger temperature of described indoor heat exchanger of described air conditioner, and when judging unit judges that the first difference of described the first indoor EAT and described the first indoor heat exchanger temperature is less than or equal to the first predetermined threshold, detect described compressor operating after second schedule time, the second indoor EAT of described indoor heat exchanger inflow point and the second indoor heat exchanger temperature of described indoor heat exchanger, described judging unit, for judging whether the first difference of described the first indoor EAT and described the first indoor heat exchanger temperature is less than or equal to the first predetermined threshold, and whether the second difference that judges described the second indoor EAT and described the second indoor heat exchanger temperature is less than or equal to described the first predetermined threshold, and when judging that described the second difference is less than or equal to described the first predetermined threshold, further judge whether described the second difference is less than or equal to the second predetermined threshold with respect to the variable quantity of described the first difference, control module, when judging that at described judging unit the variable quantity of described the first difference and described the second difference is less than or equal to the second predetermined threshold, determines that the refrigerant of described air conditioner leaks.
Refrigerant leakage detecting system according to an embodiment of the invention, while leaking due to the refrigerant of air conditioner, under refrigeration or dehumidification mode, between the temperature of indoor heat exchanger inflow point (being indoor EAT) and the temperature of indoor heat exchanger, there is the larger temperature difference, and when coolant leakage, directly have influence on the temperature of indoor heat exchanger, the temperature that is indoor heat exchanger is higher when not leaking, therefore can judge by the relation between the temperature of indoor heat exchanger inflow point and the temperature of indoor heat exchanger whether the refrigerant of air conditioner changes, and whether the refrigerant that air conditioner can be detected in time leaks.
And double when the indoor EAT of indoor heat exchanger inflow point and the temperature difference of indoor heat exchanger being detected and being all less than or equal to predetermined value by first and second schedule times at compressor operating, the difference that compares twice testing result, and at the variable quantity of the difference of twice testing result hour, the refrigerant of judging air conditioner leaks, make to carry out synthetic determination according to the result of twice detection, improve accuracy, avoided (in the certain hour section such as air conditioner start) erroneous judgement when air conditioner fluctuation of service simultaneously.In addition, by the temperature difference of indoor EAT and indoor heat exchanger, judge, also reduced to the full extent the detection error of temperature sensor.
In addition,, when the refrigerant of judging air conditioner occurs to leak, can carry out alarm, to point out in time user to process.
According to one embodiment of present invention, described control module also for: if described judging unit is judged described the second difference, with respect to the variable quantity of described the first difference, be less than or equal to described the second predetermined threshold, controlling described compressor reruned after the 3rd schedule time out of service, and control described detecting unit and described judging unit and continue to carry out and detect and deterministic process, until described judging unit is judged when number of times that described the second difference is less than or equal to described the second predetermined threshold with respect to the variable quantity of described the first difference reaches pre-determined number, the refrigerant of determining described air conditioner leaks.
Refrigerant leakage detecting system according to an embodiment of the invention, by repeatedly judging that above-mentioned the second difference is with respect to the relation of variable quantity and the predetermined threshold of the first difference, can improve the accuracy of judged result, impact result of determination being caused to eliminate accidentalia.
According to one embodiment of present invention, also comprise: acquiring unit, for obtaining the operational mode of described air conditioner; Described detecting unit also for: when the operational mode that gets described air conditioner at described acquiring unit is refrigeration mode or dehumidification mode, carry out testing process.
According to the embodiment of third aspect present invention, a kind of air conditioner has also been proposed, 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.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, 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 schematic flow diagram of coolant leakage detection method according to another 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 application's embodiment and the feature in embodiment can combine mutually.
A lot of details have been 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, comprise: step 102, the first detecting step, at the compressor operating of air conditioner, after first schedule time, detect the first indoor EAT of indoor heat exchanger inflow point and the first indoor heat exchanger temperature of described indoor heat exchanger of described air conditioner; Step 104, the second detecting step, when the first difference of described the first indoor EAT and described the first indoor heat exchanger temperature is less than or equal to the first predetermined threshold, detect described compressor operating after second schedule time, the second indoor EAT of described indoor heat exchanger inflow point and the second indoor heat exchanger temperature of described indoor heat exchanger; Step 106, determining step, when the second difference of described the second indoor EAT and described the second indoor heat exchanger temperature is less than or equal to described the first predetermined threshold, judge whether described the second difference is less than or equal to the second predetermined threshold with respect to the variable quantity of described the first difference, if so, the refrigerant of judging described air conditioner leaks.
While leaking due to the refrigerant of air conditioner, under refrigeration or dehumidification mode, between the temperature of indoor heat exchanger inflow point (being indoor EAT) and the temperature of indoor heat exchanger, there is the larger temperature difference, and when coolant leakage, directly have influence on the temperature of indoor heat exchanger, the temperature that is indoor heat exchanger is higher when not leaking, therefore can judge by the relation between the temperature of indoor heat exchanger inflow point and the temperature of indoor heat exchanger whether the refrigerant of air conditioner changes, and whether the refrigerant that air conditioner can be detected in time leaks.
And double when the indoor EAT of indoor heat exchanger inflow point and the temperature difference of indoor heat exchanger being detected and being all less than or equal to predetermined value by first and second schedule times at compressor operating, the difference that compares twice testing result, and at the variable quantity of the difference of twice testing result hour, the refrigerant of judging air conditioner leaks, make to carry out synthetic determination according to the result of twice detection, improve accuracy, avoided (in the certain hour section such as air conditioner start) erroneous judgement when air conditioner fluctuation of service simultaneously.In addition, by the temperature difference of indoor EAT and indoor heat exchanger, judge, also reduced to the full extent the detection error of temperature sensor.
In addition,, when the refrigerant of judging air conditioner 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, also comprise: if judge, described the second difference is less than or equal to described the second predetermined threshold with respect to the variable quantity of described the first difference, controlling described compressor reruned after the 3rd schedule time out of service, and described the first detecting step, described the second detecting step and described determining step are carried out in continuation, until the number of times that described the second difference is less than or equal to described the second predetermined threshold with respect to the variable quantity of described the first difference while reaching pre-determined number, judges that the refrigerant of described air conditioner leaks.
By repeatedly judging that above-mentioned the second difference, with respect to the relation of variable quantity and the predetermined threshold of the first difference, can improve the accuracy of judged result, impact result of determination being caused to eliminate accidentalia.
According to one embodiment of present invention, before carrying out described the first detecting step, also comprise: obtain the operational mode of described air conditioner, and when described operational mode is refrigeration mode or dehumidification mode, carry out described the first detecting step.
According to one embodiment of present invention, described first schedule time is 2 minutes, and described second schedule time is 3 minutes, and described the 3rd schedule time is 3 minutes.
By first schedule time was set, it is 2 minutes, make the operation that both can guarantee compressor in more stable state, can to the refrigerant of air conditioner, whether occur to leak quickly again and detect, avoid, when refrigerant occurs to leak, because detection time is long, causing the temperature of compressor in higher level, to affect the serviceable life of compressor always.
According to one embodiment of present invention, described the first predetermined threshold is in the scope of 5 ℃ to 15 ℃, and described the second predetermined threshold is in the scope of 0 ℃ to 2 ℃.
According to one embodiment of present invention, described the first predetermined threshold is 10 ℃, and described the second predetermined threshold is 1 ℃.
According to one embodiment of present invention, described pre-determined number is 3 times.Certainly, pre-determined number can be also 4 times, 5 times or other number of times.
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, comprise: detecting unit 202, for at the compressor operating of air conditioner after first schedule time, detect the first indoor EAT of indoor heat exchanger inflow point and the first indoor heat exchanger temperature of described indoor heat exchanger of described air conditioner, and when judging unit 204 judges that the first difference of described the first indoor EAT and described the first indoor heat exchanger temperature is less than or equal to the first predetermined threshold, detect described compressor operating after second schedule time, the second indoor EAT of described indoor heat exchanger inflow point and the second indoor heat exchanger temperature of described indoor heat exchanger, described judging unit 204, for judging whether the first difference of described the first indoor EAT and described the first indoor heat exchanger temperature is less than or equal to the first predetermined threshold, and whether the second difference that judges described the second indoor EAT and described the second indoor heat exchanger temperature is less than or equal to described the first predetermined threshold, and when judging that described the second difference is less than or equal to described the first predetermined threshold, further judge whether described the second difference is less than or equal to the second predetermined threshold with respect to the variable quantity of described the first difference, control module 206, for when described judging unit 204 judges that the variable quantity of described the first difference and described the second difference is less than or equal to the second predetermined threshold, determines that the refrigerant of described air conditioner leaks.
While leaking due to the refrigerant of air conditioner, under refrigeration or dehumidification mode, between the temperature of indoor heat exchanger inflow point (being indoor EAT) and the temperature of indoor heat exchanger, there is the larger temperature difference, and when coolant leakage, directly have influence on the temperature of indoor heat exchanger, the temperature that is indoor heat exchanger is higher when not leaking, therefore can judge by the relation between the temperature of indoor heat exchanger inflow point and the temperature of indoor heat exchanger whether the refrigerant of air conditioner changes, and whether the refrigerant that air conditioner can be detected in time leaks.
And double when the indoor EAT of indoor heat exchanger inflow point and the temperature difference of indoor heat exchanger being detected and being all less than or equal to predetermined value by first and second schedule times at compressor operating, the difference that compares twice testing result, and at the variable quantity of the difference of twice testing result hour, the refrigerant of judging air conditioner leaks, make to carry out synthetic determination according to the result of twice detection, improve accuracy, avoided (in the certain hour section such as air conditioner start) erroneous judgement when air conditioner fluctuation of service simultaneously.In addition, by the temperature difference of indoor EAT and indoor heat exchanger, judge, also reduced to the full extent the detection error of temperature sensor.
In addition,, when the refrigerant of judging air conditioner occurs to leak, can carry out alarm, to point out in time user to process.
According to one embodiment of present invention, described control module 206 also for: if described judging unit 204 is judged the variable quantity of corresponding described the first difference of described the second difference, be less than or equal to described the second predetermined threshold, controlling described compressor reruned after the 3rd schedule time out of service, and control described detecting unit 202 and continue to carry out detection and deterministic process with described judging unit 204, until described judging unit 204 is judged when number of times that described the second difference is less than or equal to described the second predetermined threshold with respect to the variable quantity of described the first difference reaches pre-determined number, the refrigerant of determining described air conditioner leaks.
By repeatedly judging that above-mentioned the second difference, with respect to the relation of variable quantity and the predetermined threshold of the first difference, can improve the accuracy of judged result, impact result of determination being caused to eliminate accidentalia.
According to one embodiment of present invention, also comprise: acquiring unit 208, for obtaining the operational mode of described air conditioner; Described detecting unit 202 also for: when the operational mode that gets described air conditioner at described acquiring unit 208 is refrigeration mode or dehumidification mode, carry out testing process.
The invention allows for a kind of air conditioner (not shown in Fig. 2), comprising: the refrigerant leakage detecting system 200 shown in Fig. 2.
Fig. 3 shows the schematic flow diagram of coolant leakage detection method according to another embodiment of the invention.
As shown in Figure 3, coolant leakage detection method according to another embodiment of the invention, comprising:
Step 302, air conditioner start, putting internal counter N is 0.
Step 304, judges that whether air conditioner is operated in refrigeration mode or dehumidification mode, if so, performs step 306; Otherwise, finish.
Step 306, judges that whether compressor just starts, and if so, performs step 308; Otherwise, continue execution step 306.
Step 308, when judging that compressor has just started, recording compressed machine continuous service is after 2 minutes, indoor EAT T1 and indoor heat exchanger temperature T 2.
Step 310, the difference of EAT T1 and indoor heat exchanger temperature T 2, i.e. Δ T in counting chamber.
Step 312, judges that whether Δ T is less than or equal to 10 ℃, if so, performs step 314; Otherwise, execution step 304.
Step 314, judging that Δ T is less than or equal to 10 ℃, and compressor continuous service is in the time of 3 minutes, again calculates the difference of T1 and T2, i.e. Δ T '.
Step 316, judges that whether Δ T ' is less than or equal to 10 ℃, if so, performs step 318; Otherwise, execution step 304.
Step 318, when judging that Δ T ' is less than or equal to 10 ℃, judges whether the absolute value of Δ T and Δ T ' is less than or equal to 1 ℃, if so, performs step 320; Otherwise, execution step 304.
Step 320, when the absolute value of judging Δ T and Δ T ' is less than or equal to 1 ℃, internal counter N=N+1, N value adds 1.
Step 322, judges whether N value is less than 3, if so, performs step 324, otherwise, execution step 326.
Step 324, is judging that N value is less than at 3 o'clock, and compressor shutdown was restarted after 3 minutes, execution step 308.
Step 326, judging that N value is not less than at 3 o'clock, judges the coolant leakage of air conditioner, and air conditioner is out of service, and points out user coolant leakage.
In the present embodiment, take concrete numerical value as example describes in detail technical scheme of the present invention, those skilled in the art is to be understood that, concrete numerical value in the present embodiment is also not specifically limited, while whether being less than predetermined value such as the difference judging indoor EAT and indoor heat exchanger temperature, predetermined value can be made as 10 ℃, can be also the arbitrary value in 5 ℃ to 15 ℃.
More than be described with reference to the accompanying drawings technical scheme of the present invention, consider that the coolant leakage detection method (such as surpassing 40%) normally when coolant leakage amount is higher proposing in correlation technique just can detect, and for the lower situation of coolant leakage amount, coolant leakage can not be detected exactly, can cause air conditioner with less coolant quantity, to carry out work for a long time, affect the serviceable life of compressor.Therefore, the present invention proposes a kind of new coolant leakage detection method, the refrigerant that air conditioner can be detected timely and accurately leaks.
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 modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (11)

1. a coolant leakage detection method, is characterized in that, comprising:
The first detecting step, after first schedule time, detects the first indoor EAT of indoor heat exchanger inflow point and the first indoor heat exchanger temperature of described indoor heat exchanger of described air conditioner at the compressor operating of air conditioner;
The second detecting step, when the first difference of described the first indoor EAT and described the first indoor heat exchanger temperature is less than or equal to the first predetermined threshold, detect described compressor operating after second schedule time, the second indoor EAT of described indoor heat exchanger inflow point and the second indoor heat exchanger temperature of described indoor heat exchanger;
Determining step, when the second difference of described the second indoor EAT and described the second indoor heat exchanger temperature is less than or equal to described the first predetermined threshold, judge whether described the second difference is less than or equal to the second predetermined threshold with respect to the variable quantity of described the first difference, if so, the refrigerant of judging described air conditioner leaks.
2. coolant leakage detection method according to claim 1, is characterized in that, also comprises:
If judge, described the second difference is less than or equal to described the second predetermined threshold with respect to the variable quantity of described the first difference, controlling described compressor reruned after the 3rd schedule time out of service, and described the first detecting step, described the second detecting step and described determining step are carried out in continuation, until the number of times that described the second difference is less than or equal to described the second predetermined threshold with respect to the variable quantity of described the first difference while reaching pre-determined number, judges that the refrigerant of described air conditioner leaks.
3. coolant leakage detection method according to claim 1 and 2, is characterized in that, before carrying out described the first detecting step, also comprises:
Obtain the operational mode of described air conditioner, and when described operational mode is refrigeration mode or dehumidification mode, carry out described the first detecting step.
4. coolant leakage detection method according to claim 1 and 2, is characterized in that, described first schedule time is 2 minutes, and described second schedule time is 3 minutes, and described the 3rd schedule time is 3 minutes.
5. coolant leakage detection method according to claim 1 and 2, is characterized in that, described the first predetermined threshold is in the scope of 5 ℃ to 15 ℃, and described the second predetermined threshold is in the scope of 0 ℃ to 2 ℃.
6. coolant leakage detection method according to claim 5, is characterized in that, described the first predetermined threshold is 10 ℃, and described the second predetermined threshold is 1 ℃.
7. coolant leakage detection method according to claim 1 and 2, is characterized in that, described pre-determined number is 3 times.
8. a refrigerant leakage detecting system, is characterized in that, comprising:
Detecting unit, after first schedule time, detects the first indoor EAT of indoor heat exchanger inflow point and the first indoor heat exchanger temperature of described indoor heat exchanger of described air conditioner for the compressor operating at air conditioner, and
When judging unit judges that the first difference of described the first indoor EAT and described the first indoor heat exchanger temperature is less than or equal to the first predetermined threshold, detect described compressor operating after second schedule time, the second indoor EAT of described indoor heat exchanger inflow point and the second indoor heat exchanger temperature of described indoor heat exchanger;
Described judging unit, for judging whether the first difference of described the first indoor EAT and described the first indoor heat exchanger temperature is less than or equal to the first predetermined threshold, and
Whether the second difference that judges described the second indoor EAT and described the second indoor heat exchanger temperature is less than or equal to described the first predetermined threshold, and when judging that described the second difference is less than or equal to described the first predetermined threshold, further judge whether described the second difference is less than or equal to the second predetermined threshold with respect to the variable quantity of described the first difference;
Control module, when judging that at described judging unit the variable quantity of described the first difference and described the second difference is less than or equal to the second predetermined threshold, determines that the refrigerant of described air conditioner leaks.
9. refrigerant leakage detecting system according to claim 8, is characterized in that, described control module also for:
If described judging unit is judged the variable quantity of corresponding described the first difference of described the second difference and is less than or equal to described the second predetermined threshold, controlling described compressor reruned after the 3rd schedule time out of service, and control described detecting unit and described judging unit and continue to carry out and detect and deterministic process, until described judging unit judges when number of times that described the second difference is less than or equal to described the second predetermined threshold with respect to the variable quantity of described the first difference reaches pre-determined number, determine that the refrigerant of described air conditioner leaks.
10. refrigerant leakage detecting system according to claim 8 or claim 9, is characterized in that, also comprises:
Acquiring unit, for obtaining the operational mode of described air conditioner;
Described detecting unit also for: when the operational mode that gets described air conditioner at described acquiring unit is refrigeration mode or dehumidification mode, carry out testing process.
11. 1 kinds of air conditioners, is characterized in that, comprising: the refrigerant leakage detecting system as described in any one in claim 8 to 10.
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CN104566863A (en) * 2014-12-30 2015-04-29 海信科龙电器股份有限公司 Method for detecting refrigerant leakage and air conditioner
CN104655365A (en) * 2014-12-30 2015-05-27 海信科龙电器股份有限公司 Method for detecting refrigerant leakage and air conditioner
CN105605739A (en) * 2016-01-12 2016-05-25 广东美的制冷设备有限公司 Air conditioning system and monitoring method and device of refrigerant leakage of air conditioning system
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CN106016579A (en) * 2016-05-10 2016-10-12 广东美的制冷设备有限公司 Air-conditioner system and subsection control method and device for preventing refrigerant leakage
CN106123205A (en) * 2016-06-17 2016-11-16 美的集团武汉制冷设备有限公司 Moveable air conditioner and coolant leakage detection method thereof
CN106123205B (en) * 2016-06-17 2019-07-30 美的集团武汉制冷设备有限公司 Moveable air conditioner and its coolant leakage detection method
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CN106524418B (en) * 2016-11-10 2019-03-12 邯郸美的制冷设备有限公司 Detection method, detection system and the air conditioner of air-conditioner coolant leakage
CN107120790B (en) * 2017-04-26 2019-09-20 深圳达实智能股份有限公司 A kind of hospital's fan coil temperature trend judges control method and device
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