CN104655365A - Method for detecting refrigerant leakage and air conditioner - Google Patents

Abstract

Embodiments of the present invention provide a method for detecting refrigerant leakage and an air conditioner, which are applied in the field of air conditioner control, and can detect refrigerant leakage without increasing the cost of the whole machine, which is beneficial to popularization and use of air conditioners. The method for detecting refrigerant leakage includes: when the continuous working time of the compressor of the air conditioner reaches a first preset time period, acquiring the indoor ambient temperature and the temperature of the indoor heat exchanger of the air conditioner; Check the temperature of the heat exchanger to confirm whether there is any leakage of the refrigerant of the air conditioner. The method for detecting refrigerant leakage provided by the embodiments of the present invention is used to detect whether there is leakage of air-conditioning refrigerant.

Description

Method for detecting refrigerant leakage and air conditioner

technical field

The invention relates to the field of air conditioner control, in particular to a method for detecting refrigerant leakage and an air conditioner.

Background technique

At present, commonly used household air conditioners include two parts: an indoor unit and an outdoor unit. The entire air conditioning system includes a compressor, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger. There is also a refrigerant in the air conditioning system. The refrigerant is driven by the pressure generated by the compressor, circulates in the entire system, and exchanges heat with the indoor and outdoor environments to achieve the purpose of cooling or heating. Therefore, the amount of refrigerant directly affects the performance of the air conditioner. Cooling and heating effects. However, during the installation or use of the air conditioner, there may be long-term slow leakage of refrigerant caused by the high and low pressure connecting pipe nuts of the indoor and outdoor units not being tightly sealed, or the vibration and stress of the outdoor unit pipeline may cause cracking of the refrigerant pipeline and cause refrigerant leakage. Rapid leakage, which in turn affects the cooling and heating effects of the air conditioner.

In the prior art, it is usually necessary to install temperature sensors at the inlet and outlet of the air conditioner heat exchanger respectively to detect the temperature of the refrigerant at the inlet and outlet of the air conditioner heat exchanger respectively. When the difference in the temperature of the refrigerant is less than or equal to a specific value, it means that the amount of refrigerant may be insufficient due to refrigerant leakage, and an alarm can be sent to the user, so that the user can check or repair in time. However, this method needs to set a special temperature sensor, which increases the cost of the whole machine and is not conducive to the popularization and use of air conditioners.

Contents of the invention

Embodiments of the present invention provide a method for detecting refrigerant leakage and an air conditioner, which can detect refrigerant leakage without increasing the cost of the whole machine, and are conducive to popularization and use of air conditioners.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

On the one hand, an embodiment of the present invention provides a method for detecting refrigerant leakage, which is used in an air conditioner, and the method includes:

When the continuous working time of the compressor of the air conditioner reaches a first preset time period, the indoor ambient temperature and the temperature of the indoor heat exchanger of the air conditioner are acquired;

According to the ambient temperature and the temperature of the indoor heat exchanger, it is confirmed whether the refrigerant of the air conditioner leaks.

On the other hand, an embodiment of the present invention provides an air conditioner, and the air conditioner includes:

An acquisition unit, configured to acquire the indoor ambient temperature and the indoor heat exchanger temperature of the air conditioner when the continuous working time of the compressor of the air conditioner reaches a first preset duration;

The confirming unit is configured to confirm whether the refrigerant of the air conditioner leaks according to the ambient temperature and the temperature of the indoor heat exchanger.

In another aspect, an embodiment of the present invention provides an air conditioner, including an indoor unit and an outdoor unit, the indoor unit includes an indoor heat exchanger, the outdoor unit includes a compressor, and further includes:

a first temperature sensor, a second temperature sensor and a processor;

The first temperature sensor is used to detect the indoor ambient temperature;

The second temperature sensor is used to detect the temperature of the indoor heat exchanger;

The processor is configured to acquire the ambient temperature detected by the first temperature sensor and the temperature of the indoor heat exchanger detected by the second temperature sensor when the continuous operation of the compressor reaches a first preset duration, according to the The ambient temperature and the temperature of the indoor heat exchanger are used to confirm whether there is leakage of the refrigerant of the air conditioner.

Embodiments of the present invention provide a method for detecting refrigerant leakage and an air conditioner. The method for detecting refrigerant leakage includes: when the compressor of the air conditioner continues to work for a first preset duration, first obtain the indoor ambient temperature and The temperature of the indoor heat exchanger of the air conditioner, and then confirm whether the refrigerant of the air conditioner leaks according to the ambient temperature and the temperature of the indoor heat exchanger. Compared with the prior art, the embodiment of the present invention can use the existing sensor for obtaining the ambient temperature and the sensor for obtaining the temperature of the indoor heat exchanger of the air conditioner to obtain the ambient temperature and the temperature of the indoor heat exchanger respectively. And when the air conditioner is used for heating, the temperature of the indoor heat exchanger should be much higher than the ambient temperature. When the air conditioner refrigerant is sufficient and the air conditioner is used for cooling, the temperature of the indoor heat exchanger should be much lower than the ambient temperature. At this time, no matter whether the air conditioner is heating or cooling, the difference between the ambient temperature and the temperature of the indoor heat exchanger is not large. Therefore, according to the above-mentioned law between the ambient temperature and the temperature of the indoor heat exchanger, it can be determined that the air conditioner refrigerant leaks. Since the air conditioner described in the embodiment of the present invention does not need to install temperature sensors at the inlet and outlet of the heat exchanger of the air conditioner, but the existing sensor of the air conditioner for detecting the ambient temperature and the sensor for detecting the temperature of the indoor heat exchanger can be used to confirm the temperature of the refrigerant. Whether it leaks or not reduces the cost of the whole machine and is conducive to the popularization and use of air conditioners.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a flowchart of a method for detecting refrigerant leakage provided by an embodiment of the present invention;

Fig. 2 is a flow chart of another method for detecting refrigerant leakage provided by an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of an air conditioner provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of another air conditioner provided by an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of another air conditioner provided by an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of another air conditioner provided by an embodiment of the present invention;

Fig. 7 is a structural schematic diagram of yet another air conditioner provided by an embodiment of the present invention;

Fig. 8 is a schematic structural diagram of yet another air conditioner provided by an embodiment of the present invention;

Fig. 9 is a schematic structural diagram of yet another air conditioner provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

An embodiment of the present invention provides a method for detecting refrigerant leakage, which is used in an air conditioner. As shown in FIG. 1 , the method includes:

Step 101, when the continuous working time of the compressor of the air conditioner reaches a first preset time period, acquire the indoor ambient temperature and the temperature of the indoor heat exchanger of the air conditioner.

In practical applications, a standard air conditioner needs to be equipped with two sensors, one sensor is used to obtain the ambient temperature so that the air conditioner can judge whether the ambient temperature is the same as the temperature set by the user, and the other sensor is used to obtain the temperature of the indoor heat exchanger to prevent The heat exchanger is frosted when the air conditioner is cooling or the pressure of the heat exchanger is too high when the air conditioner is heating. For example, the existing air conditioner can test the indoor ambient temperature through the indoor return air sensor, and then the air conditioner can compare the measured ambient temperature with the temperature set by the user to determine whether the current ambient temperature reaches the user's set temperature. At the same time, the existing air conditioner can detect the temperature of the indoor heat exchanger through the indoor piping sensor. For example, the existing air conditioner usually sets two preset temperature values, which are the corresponding first preset temperature value when the air conditioner is cooling and the first preset temperature value when the air conditioner is heating. When the air conditioner is cooling, test the temperature of the indoor heat exchanger through the indoor piping sensor, and then compare the temperature of the indoor heat exchanger with the first preset temperature value. When the temperature of the indoor heat exchanger is greater than or When it is equal to the first preset temperature value, the air conditioner is in normal use. When the temperature of the indoor heat exchanger is lower than the first preset temperature value, the compressor stops working to prevent the heat exchanger from frosting due to too low temperature; when the air conditioner is heating , the temperature of the indoor heat exchanger is tested by the indoor piping sensor, and then the temperature of the indoor heat exchanger is compared with the second preset temperature value. When the temperature of the indoor heat exchanger is greater than or equal to the second preset temperature value, the compressor stops Work, when the temperature of the indoor heat exchanger is lower than the second preset temperature value, the air conditioner is in normal use to prevent the compressor from working under too high a pressure.

As the air conditioner is turned on, the compressor has just started to work. At this time, since the compressor may not be used for a long time, the temperature of the indoor heat exchanger is not much different from the ambient temperature. Therefore, it is necessary to judge the relationship between the temperature of the indoor heat exchanger and the ambient temperature after the continuous operation of the compressor reaches the first preset time. The first preset duration is preset, and can be set according to specific situations in practical applications, which is not limited in this embodiment of the present invention.

Step 102 , according to the ambient temperature and the temperature of the indoor heat exchanger, confirm whether there is leakage of the refrigerant of the air conditioner.

When the air conditioner refrigerant is sufficient and the air conditioner is used for heating, the temperature of the indoor heat exchanger should be much higher than the ambient temperature; when the air conditioner refrigerant is sufficient and the air conditioner is used for cooling, the temperature of the indoor heat exchanger should be much lower than the ambient temperature When there is a large amount of refrigerant leakage, the compressor cannot work effectively. No matter whether the air conditioner is heating or cooling, the difference between the ambient temperature and the indoor heat exchanger temperature is not large. Therefore, according to the difference or ratio between the ambient temperature and the indoor heat exchanger temperature, Determine whether the air conditioner refrigerant leaks.

For example, when determining whether there is leakage of the air-conditioning refrigerant according to the ratio of the ambient temperature to the temperature of the indoor heat exchanger, the first preset parameter corresponding to the heating of the air conditioner and the second preset parameter corresponding to the cooling of the air conditioner can be set first, When the air conditioner is heating, when the ratio of the ambient temperature to the indoor heat exchanger temperature is greater than the first preset parameter, it is confirmed that the air conditioner refrigerant leaks; when the ratio of the ambient temperature to the indoor heat exchanger temperature is less than or equal to the first preset parameter , indicating that the heating effect of the air conditioner is good, and there is no leakage of the refrigerant; when the air conditioner is cooling, when the ratio of the ambient temperature to the temperature of the indoor heat exchanger is less than or equal to the second preset parameter, it is confirmed that the air conditioner refrigerant leaks; When the ratio of the heater temperature is greater than the second preset parameter, it indicates that the air conditioner has a good heating or cooling effect and no leakage of the refrigerant occurs. Wherein, the ambient temperature and the temperature of the indoor heat exchanger can both be in K (Kelvin) as a unit, and K is a commonly used thermodynamic unit. In practical applications, °C (Celsius) can also be used as a unit, which is not limited in the embodiment of the present invention. .

In this way, since the air conditioner described in the embodiment of the present invention does not need to install temperature sensors at the inlet and outlet of the air conditioner heat exchanger, but uses the existing sensors of the air conditioner to obtain the ambient temperature and the temperature of the indoor heat exchanger respectively, and then pass By comparing the ambient temperature with the temperature of the indoor heat exchanger, it is confirmed whether the refrigerant leaks, which reduces the cost of the whole machine and is conducive to the popularization and use of air conditioners.

Optionally, when confirming whether the refrigerant of the air conditioner leaks according to the ambient temperature and the temperature of the indoor heat exchanger, it may be determined whether the absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger is less than or equal to the preset value. If the absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger is less than or equal to a preset value, it is confirmed that the refrigerant of the air conditioner is leaking.

If the refrigerant is sufficient, the difference between the indoor heat exchanger temperature and the ambient temperature is a negative number when the air conditioner is cooling, and the difference between the indoor heat exchanger temperature and the ambient temperature is a positive number when the air conditioner is heating. Therefore, it is necessary to judge the difference between the indoor heat exchanger temperature and the ambient temperature. The absolute value of the difference, and then confirm whether there is leakage of the refrigerant through the judgment result. The preset value can be set according to the actual situation in the actual application, which is not limited in the embodiment of the present invention. For example, when the ambient temperature and the temperature of the indoor heat exchanger can both be in units of K, the preset value can be 3K or 2.5K.

For example, when the air conditioner has sufficient refrigerant and the air conditioner is used for heating, the temperature of the indoor heat exchanger should be much higher than the ambient temperature, so if the absolute value of the difference between the indoor heat exchanger temperature and the ambient temperature is less than the preset value, then Confirm that the air conditioner refrigerant leaks; when the air conditioner refrigerant is sufficient and the air conditioner is used for cooling, the temperature of the indoor heat exchanger should be much lower than the ambient temperature, so if the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than the preset value, It can be determined that the air conditioner refrigerant leaks.

Optionally, a first step may be formed from obtaining the indoor ambient temperature and the indoor heat exchanger temperature of the air conditioner to judging whether the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to a preset value. one cycle. In this way, when the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to a preset value and it is confirmed that the refrigerant of the air conditioner leaks, the first cycle can be repeated N times first, and the N is an integer greater than or equal to 1, if the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle is less than or equal to a preset value, it is confirmed that the refrigerant of the air conditioner is leaking. , there may be a preset time interval between two adjacent first periods.

In practical applications, the temperature of the indoor heat exchanger may be unstable after the air conditioner is turned on. Therefore, if the temperature of the indoor heat exchanger obtained only once is used to judge whether the refrigerant of the air conditioner is leaking, a misjudgment will occur. Therefore, it is usually possible to The first period is from obtaining the ambient temperature in the room and the temperature of the indoor heat exchanger of the air conditioner to judging whether the absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger is less than or equal to the preset value. Obtain the ambient temperature and indoor heat exchanger temperature once in a cycle, and execute the first cycle continuously for N times, that is, continuously obtain the ambient temperature and indoor heat exchanger temperature for N times, and judge the difference between the ambient temperature and the indoor heat exchanger temperature obtained in each first cycle. Whether the absolute value of the temperature difference is less than or equal to the preset value. When the absolute value of the difference between the indoor heat exchanger temperature and the ambient temperature obtained in each first cycle is less than or equal to the preset value, it is confirmed that the refrigerant of the air conditioner is leaking , which can ensure the correct rate of confirmation results and reduce misjudgment. In order to further ensure that the temperature of the indoor heat exchanger is obtained when the compressor works stably, that is, the heat exchange efficiency of the heat exchanger is stable, the two adjacent first cycles can be executed continuously without intervals, or there can be a preset time interval , so that the results between two adjacent first cycles do not affect each other, wherein the preset time interval is preset, and is set according to specific situations in practical applications, which is not limited in the embodiment of the present invention. At the same time, if the operation of the compressor is relatively stable and the heat exchange efficiency of the heat exchanger is relatively uniform, there may not be a preset time interval between two adjacent first cycles.

For example, assuming that the first preset duration is 5 minutes, the preset time interval is 5 seconds, the preset value is 3, and N is 3, that is, the first cycle is repeatedly executed 3 times. When the compressor continues to work for more than 5 minutes, the ambient temperature detected by the indoor return air sensor and the indoor heat exchanger temperature detected by the indoor piping sensor are used for the first time, and the difference between the ambient temperature and the indoor heat exchanger temperature is judged for the first time. Whether the absolute value of the absolute value is less than or equal to the preset value, and then 5 seconds later, the ambient temperature detected by the indoor return air sensor and the indoor heat exchanger temperature detected by the indoor piping sensor are used for the second time, and the ambient temperature and the indoor heat exchange temperature are judged for the second time. Whether the absolute value of the temperature difference of the heat exchanger is less than or equal to the preset value, after 5 seconds, pass the ambient temperature detected by the indoor return air sensor and the indoor heat exchanger temperature detected by the indoor piping sensor for the third time, and judge the ambient temperature for the third time Whether the absolute value of the difference with the indoor heat exchanger temperature is less than or equal to the preset value, that is, repeat the first cycle 3 times, when the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to the preset value for three times , it can be confirmed that the refrigerant of the air conditioner is leaking.

Optionally, when the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to a preset value in each first cycle, the compressor is turned off, and then the second preset After a long period of time, restart the compressor; when the continuous working time of the compressor reaches the first preset time period, repeat the first cycle Q times again, and the Q is an integer greater than or equal to 1; wherein If the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle is less than or equal to a preset value, the compressor is turned off until the compressor continues to work and reaches the For the first preset duration, repeating the first cycle Q times again is the second cycle; repeating the second cycle M times, and M is an integer greater than or equal to 1; if each second cycle In each first cycle, if the absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger is less than or equal to a preset value, it is confirmed that the refrigerant of the air conditioner is leaking.

In practical applications, when the air conditioner is just started, or the compressor of the air conditioner is restarted after a long shutdown, even if the first cycle is repeated N times at this time, it is still possible that the compressor is unstable at the beginning of the test, resulting in indoor The temperature of the heat exchanger is unstable, which makes the determination result misjudged. Therefore, the first cycle can be repeated N times, and the absolute difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle When the values are all less than or equal to the preset value, choose to temporarily turn off the compressor, and then restart the compressor after the second preset duration, and repeat the execution N times again after the compressor continues to work for the first preset duration. One cycle, judging whether the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle is less than or equal to a preset value when it is executed again, and in each first cycle when it is executed again If the absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger is still less than or equal to the preset value, it means that the probability of the first misjudgment is very small. In order to ensure the accuracy of the confirmation, it can be executed multiple times continuously. When the two results are consistent, confirm that the air-conditioning refrigerant leaks to prevent misjudgment.

For example, if the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle is less than or equal to a preset value, the compressor is turned off until the compressor continues to work. When the duration reaches the first preset duration, the first cycle is repeatedly executed Q times to form a second cycle; the second cycle is repeatedly executed M times, wherein M and Q are preset, and in practical applications according to It is set in a specific situation, which is not limited in this embodiment of the present invention. After the first cycle is repeated N times for the first time, when the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle is less than or equal to the preset value, enter the first cycle. The execution of the second cycle, in this way, when the second cycle is repeatedly executed twice, the first cycle is executed 3N times in total, so that the probability of misjudgment is very small, almost negligible.

Further, after confirming that the refrigerant of the air conditioner leaks, the air conditioner may also issue an alarm.

For example, when it is confirmed that the refrigerant of the air conditioner is leaking after continuous judgments, it means that the air conditioner is not working normally, so an alarm can be sent to the user, so that the user can repair and replenish the refrigerant in time. Among them, there are many ways to send out an alarm. An alarm light can be set on the air conditioner. When it is confirmed that the refrigerant has leaked, the alarm light can be lit to warn the user; or a buzzer can be installed on the air conditioner. When it is confirmed that the refrigerant has leaked , the knowledge buzzer beeps to warn the user. In practical applications, after confirming that the refrigerant of the air conditioner is leaking, the air conditioner may first shut down the compressor, so as to avoid irreversible damage to the compressor caused by continuous operation of the compressor when the refrigerant is insufficient.

Optionally, the air conditioner may detect the ambient temperature through an indoor return air sensor, and detect the temperature of the indoor heat exchanger through an indoor piping sensor.

Further, after judging whether the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to a preset value, the method further includes: when the ambient temperature and the indoor heat exchanger temperature When the absolute value of the difference is greater than the preset value, record the cumulative working time of the compressor; when the cumulative working time of the compressor reaches the third preset time length, judge whether the current continuous working time of the compressor is Reach the first preset duration; if the continuous working duration of the compressor of the air conditioner reaches the first preset duration, obtain the ambient temperature and the temperature of the indoor heat exchanger, and based on the ambient temperature and the Check the temperature of the indoor heat exchanger to confirm whether there is any leakage of the refrigerant of the air conditioner.

In practical applications, during the working process of the compressor, the refrigerant pipeline may crack due to the vibration and stress of the outdoor unit pipeline, resulting in rapid leakage of the refrigerant. Therefore, when it is confirmed that there is no leakage of the refrigerant, the accumulated work of the compressor can be recorded. Time, when the accumulative working time of the compressor reaches the third preset time, it means that the compressor has been working for a long time, and it is very likely that the refrigerant pipeline will crack due to the vibration and stress of the outdoor unit pipeline, resulting in refrigerant leakage. Therefore, at this time, it is possible to detect whether there is leakage of the air-conditioning refrigerant. In order to ensure that the temperature of the indoor heat exchanger is obtained when the compressor works stably, it is also possible to first determine whether the current continuous working time of the compressor reaches the first preset time. If the current continuous working time of the compressor of the air conditioner is When the first preset duration is reached, the first cycle is executed, that is, to detect whether the refrigerant leaks.

Optionally, when it is determined that there is no leakage of the air-conditioning refrigerant, the cumulative working hours of the compressor can be cleared, and then continue to record the cumulative working hours of the compressor. When the cumulative working hours of the compressor reach the third preset time, it can be determined again Whether there is leakage of refrigerant, so that not only the refrigerant is detected when the air conditioner is just turned on, but also the refrigerant is detected in real time during the operation of the air conditioner to ensure that the user can be notified in time when the refrigerant leaks, so as to prevent the compressor from being in the refrigerant for a long time. Continuous operation with less refrigerant or lack of refrigerant will cause damage to the compressor.

An embodiment of the present invention provides a method for detecting refrigerant leakage. First, when the compressor of the air conditioner continues to work for a first preset time, the ambient temperature and the temperature of the indoor heat exchanger are obtained, and then according to the ambient temperature and the The temperature of the indoor heat exchanger is used to confirm whether there is leakage of the refrigerant of the air conditioner. Compared with the prior art, since the air conditioner described in the embodiment of the present invention does not need to install temperature sensors at the inlet and outlet of the heat exchanger of the air conditioner, but uses the existing sensor of the air conditioner to confirm whether the refrigerant leaks, reducing the overall Machine cost is conducive to the popularization and use of air conditioners.

The embodiment of the present invention provides a method for detecting refrigerant leakage. As shown in Figure 2, the embodiment of the present invention assumes that the first cycle is repeated three times, the second cycle is repeated three times, the first preset duration is 5 minutes, and two adjacent The preset time interval between the first cycle is 5 seconds, the second preset duration is 3 minutes, and the preset value is 2.5K (Kelvin). The value of is limited. At the same time, the embodiment of the present invention obtains the ambient temperature through the indoor return air sensor, and obtains the temperature of the indoor heat exchanger through the indoor piping sensor. The embodiment of the invention does not limit this. Specifically, the method for detecting refrigerant leakage includes:

Step 201, turn on the air conditioner, the compressor starts to work, record the continuous working time of the compressor, N is equal to 0, M is equal to 0, and step 202 is executed.

As the air conditioner is turned on, the compressor has just started to work. At this time, since the compressor may not be used for a long time, the temperature of the indoor heat exchanger and the ambient temperature are not much different. It is impossible to judge whether the refrigerant in the compressor is sufficient, so it is necessary to record the continuous working time of the compressor. When the continuous working time of the compressor meets the preset conditions, it can be judged whether the refrigerant is present by obtaining the ambient temperature and the temperature of the indoor heat exchanger. Leakage can improve the accuracy of judgment results.

It should be noted that since the air conditioner will have heating or cooling, air supply and defrosting modes during operation, when the air conditioner works in the air supply and defrost mode, the compressor does not work, so the temperature of the indoor heat exchanger and the environment At this time, it is impossible to judge whether there is leakage of the refrigerant.

Step 202: When the continuous working time of the compressor is longer than or equal to the first preset time length, obtain the ambient temperature detected by the indoor return air sensor of the air conditioner and the indoor heat exchanger temperature detected by the indoor piping sensor of the air conditioner, and perform the step 203.

In practical applications, it is necessary to judge the relationship between the temperature of the indoor heat exchanger and the ambient temperature after the compressor continues to work for the first preset period of time. The first preset duration is preset, and can be set according to specific situations in practical applications, which is not limited in this embodiment of the present invention.

In practical applications, existing air conditioners need to detect the indoor ambient temperature, and then compare the measured ambient temperature with the temperature set by the user to determine whether the current ambient temperature reaches the user's set temperature. At the same time, existing air conditioners need to detect the temperature of the indoor heat exchanger to prevent the heat exchanger from frosting due to too low temperature or the working pressure of the compressor is too high. Therefore, the sensor used to detect the ambient temperature and the temperature sensor used to detect the heat exchanger temperature The sensor is the standard configuration of the existing air conditioner. The embodiment of the present invention is described by taking the indoor return air sensor and the indoor piping sensor to obtain the ambient temperature and the temperature of the indoor heat exchanger as an example. In the embodiments of the present invention, both the ambient temperature and the temperature of the indoor heat exchanger are in K.

Step 203, judging whether the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to 2.5K, when the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to 2.5K K, execute step 204; when the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is greater than 2.5K, execute step 209.

If the refrigerant is sufficient, the difference between the indoor heat exchanger temperature and the ambient temperature is a negative number when the air conditioner is cooling, and the difference between the indoor heat exchanger temperature and the ambient temperature is a positive number when the air conditioner is heating. Therefore, it is necessary to judge the difference between the indoor heat exchanger temperature and the ambient temperature. The absolute value of the difference, when the absolute value of the difference between the indoor heat exchanger temperature and the ambient temperature is less than 2.5K, it means that the indoor heat exchanger temperature is not much different from the ambient temperature. However, when the refrigerant is sufficient, the temperature of the indoor heat exchanger should be much lower than the ambient temperature when the air conditioner is cooling, and the temperature of the indoor heat exchanger should be much higher than the ambient temperature when the air conditioner is heating. Under normal circumstances, when the air conditioner is working normally, the absolute value of the difference between the indoor heat exchanger temperature and the ambient temperature should be relatively large. If the absolute value of the difference between the indoor heat exchanger temperature and the ambient temperature is less than 2.5K, it means that the indoor heat exchanger The temperature is close to the ambient temperature, which is caused by a large amount of leakage of the air-conditioning refrigerant and the failure of the heat exchanger to perform normal cooling or heating. The 2.5K is set according to specific conditions, which is not limited in this embodiment of the present invention.

In step 204, N is increased by 1, and step 205 is executed.

Step 205, judge whether N is equal to 3, when N is equal to 3, execute step 206; when N is not equal to 3, execute step 202 after 5 seconds.

In practical applications, the temperature of the indoor heat exchanger may be unstable after the air conditioner is turned on. Therefore, if the temperature of the indoor heat exchanger obtained only once is used to judge whether the refrigerant of the air conditioner is leaking, a misjudgment will occur. Therefore, it is usually possible to Repeat the above steps 3 times. For example, the method of obtaining the ambient temperature detected by the indoor return air sensor of the air conditioner and the indoor heat exchanger temperature detected by the indoor piping sensor of the air conditioner and judging the difference between the ambient temperature and the indoor heat exchanger temperature may be Whether the absolute value is less than or equal to the preset value to form the first cycle, set the parameter N, execute N plus 1 every time the first cycle is executed, when N is equal to 3, it means that the first cycle has been completed three times, and each first cycle The absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger in the cycle is less than or equal to 2.5K, so it can be preliminarily determined that the refrigerant may leak.

However, when the first cycle is repeated three times, the compressor may not work stably, or the compressor may not be fully heating or cooling, and the temperature of the indoor heat exchanger may not be very high or low. The absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle is less than or equal to 2.5K, and it may not be caused by refrigerant leakage, so in practical applications, the above steps can be performed cyclically three times, Reduce the misjudgment rate.

Step 206, judging whether M is equal to 3, when M is not equal to 3, execute step 207; when M is equal to 3, execute step 211.

In practical applications, the first cycle can be executed multiple times within a reasonable range. For example, the first cycle can be executed 3 times each time, M times in a row. When M is equal to 3, it means that the first cycle has been executed 9 times , the probability of misjudgment is very small at this time. Therefore, after executing the first cycle three times each time, in order to ensure the number of executions of the first cycle, it is necessary to determine whether M is equal to a preset threshold, which is 3 in the embodiment of the present invention.

In step 207, M is increased by 1, and step 208 is executed.

Step 208: Turn off the compressor for three minutes and then restart the compressor, and execute step 202.

After repeating the first cycle N times, N in the embodiment of the present invention is 3, if the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle is less than or equal to 2.5K, it means There may be leakage of the refrigerant, but this result may also be caused by the unstable operation of the compressor, and the leakage of the refrigerant cannot be completely confirmed. Therefore, the difference between the ambient temperature and the temperature of the indoor heat exchanger in each first cycle When the absolute values of both are less than or equal to 2.5K, you can turn off the compressor for 3 minutes, then turn on the compressor again, and then re-acquire the ambient temperature and the temperature of the indoor heat exchanger for judgment.

Step 209 , the compressor works normally, record the accumulative working time of the compressor, and execute step 210 .

When the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is greater than 2.5K, it indicates that the difference between the indoor heat exchanger temperature and the ambient temperature is large, which further indicates that the compressor can perform normal heating or cooling work, that is, the refrigerant Sufficient, so the compressor can continue to work normally, at which point the accumulated operating hours of the compressor can be started.

Step 210, when the accumulative working time of the compressor reaches the third preset time length, judge whether the current continuous working time of the compressor reaches the first preset time length, if the current continuous working time of the compressor of the air conditioner is When the first preset duration is reached, step 202 is executed; if the continuous working duration of the compressor of the air conditioner is less than the first preset duration, step 209 is executed.

In practical applications, during the working process of the compressor, the refrigerant pipeline may crack due to the vibration and stress of the outdoor unit pipeline, resulting in rapid leakage of the refrigerant. Therefore, when it is confirmed that there is no leakage of the refrigerant, the accumulated work of the compressor can be recorded. Time, when the accumulative working time of the compressor reaches the third preset time, it means that the compressor has been working for a long time, and it is very likely that the refrigerant pipeline will crack due to the vibration and stress of the outdoor unit pipeline, resulting in refrigerant leakage. Therefore, at this time, it is possible to detect whether the air-conditioning refrigerant leaks again. In order to ensure that the temperature of the indoor heat exchanger is obtained when the compressor is working stably, it may also first be determined whether the current continuous working time of the compressor reaches the first preset time. When the first preset duration is reached, step 202 is executed, that is, to detect whether the refrigerant leaks.

Step 211, turn on the alarm light.

If the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle is less than or equal to a preset value, turn off the compressor until the second time and repeat the N times. One cycle is a second cycle. After the second cycle is repeated M times continuously, if in each first cycle of each second cycle, the absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger are less than or equal to the preset value, and the misjudgment rate is low at this time, and it can be completely confirmed that the refrigerant of the air conditioner is leaking, so the alarm light can be turned on to warn the user of the refrigerant leakage, so that the user can repair the air conditioner in time and repair the refrigerant. Make supplements. In practical applications, the compressor may also be turned off first, so as to avoid damage to the compressor caused by continuous operation of the compressor when the refrigerant is insufficient.

Compared with the prior art, the embodiment of the present invention uses the existing sensors of the air conditioner to obtain the ambient temperature and the temperature of the indoor heat exchanger respectively. When the air conditioner has sufficient refrigerant and the air conditioner is used for heating, the temperature of the indoor heat exchanger should be much higher than Ambient temperature, so if the difference between the indoor heat exchanger temperature and the ambient temperature is less than the preset value, it can be determined that the air conditioner refrigerant leaks; when the air conditioner refrigerant is sufficient and the air conditioner is used for cooling, the indoor heat exchanger temperature should be much lower than the ambient temperature. Therefore, according to the above rules, it can be determined whether the air conditioner refrigerant leaks. Since the air conditioner described in the embodiment of the present invention does not need to install temperature sensors at the inlet and outlet of the air conditioner heat exchanger, but can confirm whether the refrigerant leaks by using the existing sensors of the air conditioner, the cost of the whole machine is reduced, which is beneficial to the air conditioner. promotional use.

An embodiment of the present invention provides an air conditioner 30. As shown in FIG. 3, the air conditioner includes:

The acquisition unit 301 is configured to acquire the indoor ambient temperature and the indoor heat exchanger temperature of the air conditioner 30 when the continuous working time of the compressor of the air conditioner 30 reaches a first preset time period.

It should be noted that both the sensor for obtaining the ambient temperature and the sensor for obtaining the temperature of the indoor heat exchanger are standard configurations of the existing air conditioner 30 .

With the opening of the air conditioner 30, the compressor has just started to work. At this time, because the compressor may not be used for a long time, the temperature of the indoor heat exchanger and the ambient temperature are not much different. It is impossible to judge whether the refrigerant in the compressor is sufficient, so it is necessary to judge the relationship between the temperature of the indoor heat exchanger and the ambient temperature after the compressor has been continuously working for the first preset time. The first preset duration is preset, and can be set according to specific situations in practical applications, which is not limited in this embodiment of the present invention.

The confirming unit 302 is configured to confirm whether the refrigerant of the air conditioner leaks according to the ambient temperature and the temperature of the indoor heat exchanger.

When the air conditioner refrigerant is sufficient and the air conditioner is used for heating, the temperature of the indoor heat exchanger should be much higher than the ambient temperature; when the air conditioner refrigerant is sufficient and the air conditioner is used for cooling, the temperature of the indoor heat exchanger should be much lower than the ambient temperature When there is a large amount of refrigerant leakage, the compressor cannot work effectively. No matter whether the air conditioner is heating or cooling, the difference between the ambient temperature and the indoor heat exchanger temperature is not large. Therefore, according to the difference or ratio between the ambient temperature and the indoor heat exchanger temperature, Determine whether the air conditioner refrigerant leaks.

In this way, since the air conditioner described in the embodiment of the present invention does not need to install temperature sensors at the inlet and outlet of the air conditioner heat exchanger, but uses the existing sensors of the air conditioner to obtain the ambient temperature and the temperature of the indoor heat exchanger respectively, and then pass By comparing the ambient temperature with the temperature of the indoor heat exchanger, it is confirmed whether the refrigerant leaks, which reduces the cost of the whole machine and is conducive to the popularization and use of air conditioners.

Optionally, the confirmation unit 302 is specifically configured to: determine whether the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to a preset value; If the absolute values of the temperature differences of the air conditioners are all less than or equal to the preset value, it is confirmed that the refrigerant of the air conditioner 30 leaks.

Optionally, from acquiring the indoor ambient temperature and the indoor heat exchanger temperature of the air conditioner 30 to judging whether the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to a preset value is a first one cycle.

As shown in FIG. 4 , the air conditioner 30 further includes a first executing unit 303, configured to repeatedly execute the first cycle N times, where N is an integer greater than or equal to 1; the confirming unit 302 is specifically used if The absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger in each first cycle is less than or equal to a preset value, and it is confirmed that the refrigerant of the air conditioner 30 is leaking.

Optionally, from acquiring the indoor ambient temperature and the indoor heat exchanger temperature of the air conditioner to judging whether the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to a preset value is a first cycle.

As shown in FIG. 5 , the air conditioner 30 also includes a second execution unit 304, configured to repeatedly execute the first cycle N times, where N is an integer greater than or equal to 1; if each first cycle The absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger is less than or equal to a preset value, and the compressor is turned off; after a second preset duration, the compressor is restarted; when the compressor continues to work for a long time When the first preset duration is reached, the first cycle is repeatedly executed Q times, and the Q is an integer greater than or equal to 1; The absolute values of the temperature differences of the heaters are all less than or equal to a preset value, and the compressor is turned off until the compressor continues to work for the first preset duration, and the first cycle is repeated Q times is a second cycle; the second cycle is repeatedly executed M times, where M is an integer greater than or equal to 1.

The confirming unit 302 is specifically configured to confirm that the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to a preset value in each first cycle of each second cycle. Air conditioner refrigerant leaks.

Exemplarily, as shown in Figure 6, the air conditioner 30 also includes:

The control unit 305 is configured to issue an alarm after confirming that the refrigerant of the air conditioner 30 leaks.

Optionally, the air conditioner 30 may detect the ambient temperature through an indoor return air sensor of the air conditioner, and detect the temperature of the indoor heat exchanger through an indoor piping sensor of the air conditioner.

Further, as shown in Figure 7, the air conditioner 30 also includes:

The recording unit 306 is configured to record the accumulative working time of the compressor when the absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger is greater than the preset value.

The judging unit 307 is configured to judge whether the current continuous working time of the compressor reaches the first preset time when the accumulative working time of the compressor reaches a third preset time.

The obtaining unit 301 is further configured to re-acquire the ambient temperature and the indoor heat exchanger temperature if the continuous working time of the compressor of the air conditioner reaches the first preset time.

The confirmation unit 302 is further configured to confirm whether there is leakage of the refrigerant of the air conditioner according to the ambient temperature and the temperature of the indoor heat exchanger reacquired by the acquisition unit.

An embodiment of the present invention provides an air conditioner. Firstly, when the continuous working time of the compressor of the air conditioner reaches the first preset duration, the ambient temperature and the temperature of the indoor heat exchanger of the air conditioner are acquired through the acquisition unit, and then the confirmation unit Confirm that the refrigerant of the air conditioner is leaking. Compared with the prior art, since the air conditioner described in the embodiment of the present invention does not need to install temperature sensors at the inlet and outlet of the heat exchanger of the air conditioner, but uses the existing sensor of the air conditioner to confirm whether the refrigerant leaks, reducing the The cost of the whole machine is conducive to the popularization and use of the air conditioner 80.

An embodiment of the present invention provides an air conditioner 80, including an indoor unit and an outdoor unit, the indoor unit includes an indoor heat exchanger, and the outdoor unit includes a compressor. As shown in FIG. 8, the air conditioner 80 further includes:

A first temperature sensor 801, a second temperature sensor 802 and a processor 803;

The first temperature sensor 801 is used to detect the indoor environment temperature;

The second temperature sensor 802 is used to detect the temperature of the indoor heat exchanger;

The processor 803 is configured to obtain the ambient temperature detected by the first temperature sensor 801 and the temperature of the indoor heat exchanger detected by the second temperature sensor 802 when the continuous operation of the compressor reaches a first preset duration , according to the ambient temperature and the temperature of the indoor heat exchanger, confirm whether the refrigerant of the air conditioner 80 leaks.

In this way, the air conditioner described in the embodiment of the present invention does not need to install temperature sensors at the inlet and outlet of the heat exchanger of the air conditioner, but uses the existing sensor of the air conditioner to detect the ambient temperature and the sensor to detect the temperature of the indoor heat exchanger. Whether the refrigerant leaks can be confirmed, the cost of the whole machine is reduced, and it is beneficial to the popularization and use of air conditioners.

Further, the processor 803 is specifically configured to:

judging whether the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to a preset value;

If the absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger is less than or equal to a preset value, it is confirmed that the refrigerant of the air conditioner 80 is leaking.

Further, from acquiring the indoor ambient temperature and the indoor heat exchanger temperature of the air conditioner 80 to judging whether the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to a preset value is a first cycle;

The processor 803 is specifically configured to repeatedly execute the first cycle N times, where N is an integer greater than or equal to 1;

If the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle is less than or equal to a preset value, it is confirmed that the refrigerant of the air conditioner 80 is leaking.

Preferably, from acquiring the indoor ambient temperature and the indoor heat exchanger temperature of the air conditioner 80 to judging whether the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature is less than or equal to a preset value is a first a cycle;

The processor 803 is specifically configured to repeatedly execute the first cycle N times, where N is an integer greater than or equal to 1;

If the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle is less than or equal to a preset value, turn off the compressor;

After a second preset duration, restarting the compressor;

When the continuous working time of the compressor reaches the first preset time length, the first cycle is repeatedly executed Q times, and the Q is an integer greater than or equal to 1;

Wherein, if the absolute value of the difference between the ambient temperature and the indoor heat exchanger temperature in each first cycle is less than or equal to a preset value, the compressor is turned off until the compressor continues to work and reaches the specified value. When the first preset duration is mentioned, the first cycle is repeated Q times again, which is the second cycle;

repeatedly executing the second cycle M times, where M is an integer greater than or equal to 1;

If the absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger in each first cycle of each second cycle is less than or equal to a preset value, it is confirmed that the refrigerant of the air conditioner 80 is leaking.

Optionally, the processor 803 is further configured to shut down the compressor after it is confirmed that the refrigerant of the air conditioner 80 leaks.

Optionally, as shown in FIG. 9 , the air conditioner 80 further includes an alarm 804;

The processor 803 is further configured to control the alarm 804 to issue an alarm after confirming that the refrigerant of the air conditioner 80 leaks.

Optionally, the first temperature sensor 801 is an indoor return air sensor arranged at the return air outlet of the air conditioner 80;

The second temperature sensor 802 is an indoor piping sensor connected to the piping of the air conditioner 80 .

Further, the processor 803 is further configured to record the cumulative working time of the compressor when the absolute value of the difference between the ambient temperature and the temperature of the indoor heat exchanger is greater than the preset value;

When the accumulative working time of the compressor reaches a third preset duration, it is judged whether the current continuous working duration of the compressor reaches the first preset duration;

If the continuous working time of the compressor of the air conditioner 80 reaches the first preset time, obtain the ambient temperature and the indoor heat exchanger temperature, and confirm the Check whether the refrigerant of the air conditioner 80 leaks.

An embodiment of the present invention provides an air conditioner. First, when the compressor of the air conditioner continues to work for a first preset time, the ambient temperature and the temperature of the indoor heat exchanger of the air conditioner are obtained, and then the ambient temperature and the indoor heat exchanger are obtained. Check the temperature of the heater to confirm that the refrigerant of the air conditioner is leaking. Compared with the prior art, since the air conditioner described in the embodiment of the present invention does not need to install temperature sensors at the inlet and outlet of the heat exchanger of the air conditioner, but uses the existing sensor of the air conditioner to confirm whether the refrigerant leaks, reducing the The cost of the whole machine is conducive to the popularization and use of air conditioners.

Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described devices and units can refer to the corresponding process in the foregoing method embodiments, and details are not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (21)

1. detect a method for coolant leakage, for air-conditioning, it is characterized in that, described method comprises:

When the compressor continuous firing duration of described air-conditioning reaches the first preset duration, obtain indoor environment temperature and the indoor heat exchanger temperature of described air-conditioning;

According to described environment temperature and described indoor heat exchanger temperature, confirm whether the refrigerant of described air-conditioning occurs leaking.

2., according to described method according to claim 1, it is characterized in that, described according to described environment temperature and described indoor heat exchanger temperature, confirm whether the refrigerant of described air-conditioning occurs that leakage comprises:

Judge whether the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature is less than or equal to default value;

If the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature is less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning.

3., according to described method according to claim 2, it is characterized in that,

Whether being less than or equal to default value from the absolute value of the indoor heat exchanger temperature to the difference judging described environment temperature and described indoor heat exchanger temperature that obtain indoor environment temperature and described air-conditioning is the period 1;

If be less than or equal to default value at the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature, before confirming that leaking appears in the refrigerant of described air-conditioning, described method also comprises:

Repeat N described period 1, described N be more than or equal to 1 integer;

If the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature is less than or equal to default value, confirm that the refrigerant of described air-conditioning occurs that leakage is specially:

If the absolute value of the difference of environment temperature described in each period 1 and described indoor heat exchanger temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning.

4., according to described method according to claim 2, it is characterized in that,

Whether being less than or equal to default value from the absolute value of the indoor heat exchanger temperature to the difference judging described environment temperature and described indoor heat exchanger temperature that obtain indoor environment temperature and described air-conditioning is the period 1;

Repeat N described period 1, described N be more than or equal to 1 integer;

If the absolute value of the difference of environment temperature described in each period 1 and described indoor heat exchanger temperature is all less than or equal to default value, close described compressor;

After second preset duration, restart described compressor;

When described compressor continuous firing duration reaches described first preset duration, again repeat Q described period 1, described Q be more than or equal to 1 integer;

If be wherein all less than or equal to default value from the absolute value of the difference of environment temperature described in each period 1 and described indoor heat exchanger temperature, close described compressor to when described compressor continuous firing duration reaches described first preset duration, again repeating Q described period 1 is second round;

Repeat M described second round, described M be more than or equal to 1 integer;

If the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature is less than or equal to default value, confirm that the refrigerant of described air-conditioning occurs that leakage is specially:

If in each period 1 of each second round, the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature is all less than or equal to default value, confirms that leaking appears in the refrigerant of described air-conditioning.

5. the method according to described claim 2 to 4 any one claim, is characterized in that, after leaking appears in the refrigerant of the described air-conditioning of described confirmation, described method also comprises:

Described air-conditioning gives the alarm.

6. the method according to described Claims 1-4 any one claim, is characterized in that,

Detect described environment temperature by the indoor return air sensor of described air-conditioning, detect described indoor heat exchanger temperature by the indoor tube sensor of described air-conditioning.

7. according to described method according to claim 2, it is characterized in that, after whether the absolute value of the difference judging described environment temperature and described indoor heat exchanger temperature is less than or equal to default value, described method also comprises:

When the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature is greater than described default value, record the cumulative operation time of described compressor;

When the cumulative operation time of described compressor reaches the 3rd preset duration, judge whether current described compressor continuous firing duration reaches described first preset duration;

If the compressor continuous firing duration of current described air-conditioning reaches described first preset duration, obtain described environment temperature and described indoor heat exchanger temperature, and according to described environment temperature and described indoor heat exchanger temperature, confirm whether the refrigerant of described air-conditioning occurs leaking.

8. an air-conditioning, is characterized in that, described air-conditioning comprises:

Acquiring unit, for when the compressor continuous firing duration of described air-conditioning reaches the first preset duration, obtains indoor environment temperature and the indoor heat exchanger temperature of described air-conditioning;

Confirmation unit, for according to described environment temperature and described indoor heat exchanger temperature, confirms whether the refrigerant of described air-conditioning occurs leaking.

9., according to described air-conditioning according to claim 8, it is characterized in that, described confirmation unit specifically for:

Judge whether the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature is less than or equal to default value;

If the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning.

10., according to described air-conditioning according to claim 9, it is characterized in that,

Whether being less than or equal to default value from the absolute value of the indoor heat exchanger temperature to the difference judging described environment temperature and described indoor heat exchanger temperature that obtain indoor environment temperature and described air-conditioning is a period 1;

Described air-conditioning also comprises the first performance element, for repeating N described period 1, described N be more than or equal to 1 integer;

Described confirmation unit specifically for:

If the absolute value of the difference of environment temperature described in each period 1 and described indoor heat exchanger temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning.

11., according to described air-conditioning according to claim 9, is characterized in that,

Whether being less than or equal to default value from the absolute value of the indoor heat exchanger temperature to the difference judging described environment temperature and described indoor heat exchanger temperature that obtain indoor environment temperature and described air-conditioning is a period 1;

Described air-conditioning also comprises the second performance element, for repeating N described period 1, described N be more than or equal to 1 integer;

If the absolute value of the difference of environment temperature described in each period 1 and described indoor heat exchanger temperature is all less than or equal to default value, close described compressor;

After second preset duration, restart described compressor;

When described compressor continuous firing duration reaches described first preset duration, again repeat Q described period 1, described Q be more than or equal to 1 integer;

If be wherein all less than or equal to default value from the absolute value of the difference of environment temperature described in each period 1 and described indoor heat exchanger temperature, close described compressor to when described compressor continuous firing duration reaches described first preset duration, again repeating Q described period 1 is second round;

Repeat M described second round, described M be more than or equal to 1 integer;

If described confirmation unit is specifically in each period 1 of each second round, the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature is all less than or equal to default value, confirms that leaking appears in the refrigerant of described air-conditioning.

12. air-conditionings according to described claim 9 to 11 any one claim, it is characterized in that, described air-conditioning also comprises:

Control module, gives the alarm after occurring leaking at the refrigerant of the described air-conditioning of described confirmation.

13. air-conditionings according to described claim 8 to 11 any one claim, is characterized in that,

Detect described environment temperature by the indoor return air sensor of described air-conditioning, detect described indoor heat exchanger temperature by the indoor tube sensor of described air-conditioning.

14., according to described air-conditioning according to claim 9, is characterized in that, described air-conditioning also comprises:

Record cell, when the absolute value for the difference when described environment temperature and described indoor heat exchanger temperature is greater than described default value, records the cumulative operation time of described compressor;

Judging unit, for when the cumulative operation time of described compressor reaches the 3rd preset duration, judges whether current described compressor continuous firing duration reaches described first preset duration;

If described acquiring unit also reaches described first preset duration for the compressor continuous firing duration of current described air-conditioning, again obtain described environment temperature and described indoor heat exchanger temperature

Described confirmation unit, also for the described environment temperature that again obtains according to described acquiring unit and described indoor heat exchanger temperature, confirms whether the refrigerant of described air-conditioning occurs leaking.

15. 1 kinds of air-conditionings, comprise indoor set and off-premises station, and described indoor set comprises indoor heat exchanger, and described off-premises station comprises compressor, it is characterized in that, described air-conditioning also comprises:

First temperature sensor, the second temperature sensor and processor;

Described first temperature sensor is for detecting indoor environment temperature;

Described second temperature sensor is used for heat exchange temperature in sensing chamber;

Described processor is used for when described compressor continuous firing duration reaches the first preset duration, obtain the environment temperature of described first temperature sensor detection and the indoor heat exchanger temperature of described second temperature sensor detection, according to described environment temperature and described indoor heat exchanger temperature, confirm whether the refrigerant of described air-conditioning occurs leaking.

16., according to described air-conditioning according to claim 15, is characterized in that, described processor specifically for:

Judge whether the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature is less than or equal to default value;

If the absolute value of the difference of described environment temperature and described indoor heat exchanger temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning.

17., according to described air-conditioning according to claim 16, is characterized in that,

Whether being less than or equal to default value from the absolute value of the indoor heat exchanger temperature to the difference judging described environment temperature and described indoor heat exchanger temperature that obtain indoor environment temperature and described air-conditioning is the period 1;

Described processor specifically for repeating N described period 1, described N be more than or equal to 1 integer;

If the absolute value of the difference of environment temperature described in each period 1 and described indoor heat exchanger temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning.

18., according to described air-conditioning according to claim 16, is characterized in that,

Whether being less than or equal to default value from the absolute value of the indoor heat exchanger temperature to the difference judging described environment temperature and described indoor heat exchanger temperature that obtain indoor environment temperature and described air-conditioning is a period 1;

Described processor specifically for repeating N described period 1, described N be more than or equal to 1 integer;

If the absolute value of the difference of environment temperature described in each period 1 and described indoor heat exchanger temperature is all less than or equal to default value, close described compressor;

After second preset duration, restart described compressor;

When described compressor continuous firing duration reaches described first preset duration, again repeat Q described period 1, described Q be more than or equal to 1 integer;

If be wherein all less than or equal to default value from the absolute value of the difference of environment temperature described in each period 1 and described indoor heat exchanger temperature, close described compressor to when described compressor continuous firing duration reaches described first preset duration, again repeating Q described period 1 is second round;

Repeat M described second round, described M be more than or equal to 1 integer;

If the absolute value of the difference of the described environment temperature of each period 1 of each second round and described indoor heat exchanger temperature is all less than or equal to default value, confirm that leaking appears in the refrigerant of described air-conditioning.

19. air-conditionings according to described claim 16 to 18 any one claim, it is characterized in that, described air-conditioning also comprises warning horn;

Described processor also gives the alarm for controlling described warning horn after the refrigerant appearance leakage of the described air-conditioning of described confirmation.

20. air-conditionings according to described claim 15 to 18 any one claim, is characterized in that,

Described first temperature sensor is the indoor return air sensor being arranged on described return air inlet for air-conditioner;

Described second temperature sensor is the indoor tube sensor be connected with the pipe arrangement of described air-conditioning.

21., according to described air-conditioning according to claim 16, is characterized in that,

When described processor is also greater than described default value for the absolute value of the difference when described environment temperature and described indoor heat exchanger temperature, record the cumulative operation time of described compressor;

When the cumulative operation time of described compressor reaches the 3rd preset duration, judge whether current described compressor continuous firing duration reaches described first preset duration;

If the compressor continuous firing duration of current described air-conditioning reaches the first preset duration, obtain described environment temperature and described indoor heat exchanger temperature, and according to described environment temperature and described indoor heat exchanger temperature, confirm whether the refrigerant of described air-conditioning occurs leaking.