CN115523609A

CN115523609A - Method and device for detecting refrigerant abnormity, air conditioner and storage medium

Info

Publication number: CN115523609A
Application number: CN202211037877.9A
Authority: CN
Inventors: 李海军; 李鹏辉; 赵国胜; 贾香慧; 周洪进; 杨青; 张润雨
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-12-27
Also published as: WO2024041005A1

Abstract

The application relates to the technical field of intelligent household appliances, and discloses a method for detecting refrigerant abnormity, which is applied to the refrigeration operation working condition of an air conditioner. The method comprises the following steps: and under the condition that the continuous operation time length of the compressor is greater than or equal to the preset time length, detecting the current indoor environment temperature Tr and the current indoor coil temperature Tp. When Tr is greater than or equal to T1, the refrigerant circulation is analyzed according to Tr, tp and the initial coil temperature Tp 1. And when the T2 is more than or equal to Tr and less than T1, analyzing the condition of the refrigerant circulation according to Tr, tp1 and the current state of the compressor. Wherein, T1 is a first temperature threshold value, and T2 is a second temperature threshold value. And outputting prompting information of the refrigerant circulation abnormity under the condition of the refrigerant circulation abnormity. The method improves the accuracy of refrigerant leakage detection in a refrigeration state. The application also discloses a device for detecting the refrigerant abnormity, an air conditioner and a storage medium.

Description

Method and device for detecting refrigerant abnormity, air conditioner and storage medium

Technical Field

The present invention relates to the field of intelligent household electrical appliance technologies, and for example, to a method and an apparatus for detecting refrigerant abnormality, an air conditioner, and a storage medium.

Background

At present, the refrigerant abnormity of the air conditioner is the most prominent and common problem in the after-sale feedback, and the system operation can be in an abnormal state after the refrigerant abnormity of the air conditioner. The refrigerant abnormity of the air conditioner directly affects the refrigeration effect of the air conditioner, so the refrigerant abnormity detection is very necessary in the operation process of the air conditioner.

In order to solve the problem of the requirement for refrigerant abnormity detection in the refrigeration operation working condition of the air conditioner, the related technology discloses a refrigerant abnormity detection method of the air conditioner. The method comprises the following steps: and after the system is stable, the refrigerant abnormity is detected, and the refrigerant abnormity of the air conditioner is detected by comparing and analyzing the actual indoor coil temperature with the initial indoor coil temperature and the indoor environment temperature respectively.

In the process of implementing the embodiment of the present disclosure, when detecting refrigerant abnormality, the influence of the related art on the refrigerant abnormality detection result under the refrigeration condition is not considered when the current indoor environment temperature range is different and the state of the compressor is different. Although the related art can detect the refrigerant abnormity under the refrigeration working condition, the detection method is insensitive and is easy to misjudge, and the detection accuracy of the refrigerant abnormity is low.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a method and a device for detecting refrigerant abnormity, an air conditioner and a storage medium, so as to improve the accuracy of refrigerant abnormity detection in a refrigeration operation working condition.

In some embodiments, the method comprises: detecting the current indoor environment temperature Tr and the current indoor coil temperature Tp under the condition that the continuous operation time length of the compressor is greater than or equal to the preset time length; under the condition that Tr is larger than or equal to T1, analyzing the refrigerant circulation condition according to Tr, tp and the initial coil temperature Tp 1; under the condition that T2 is more than or equal to Tr and less than T1, analyzing the condition of refrigerant circulation according to Tr, tp1 and the current state of the compressor; under the condition of abnormal refrigerant circulation, outputting prompt information of the abnormal refrigerant circulation; wherein T1 is a first temperature threshold and T2 is a second temperature threshold.

In the above embodiment, when the continuous operation time of the compressor is longer than or equal to the preset time, the current indoor environment temperature is in different temperature intervals, and the logical analysis is performed respectively. And judging the heat exchange quantity of the current air conditioner according to Tr, tp and Tp1 under the condition that Tr is larger than or equal to T1, and analyzing the refrigerant circulation condition. And under the condition that T2 is more than or equal to Tr and less than T1, judging the heat exchange quantity of the current air conditioner according to Tr, tp and Tp1, and simultaneously, eliminating the possible misjudgment condition in the detection process by combining the current state of the compressor. The detection method reduces the probability of misjudgment and improves the accuracy of refrigerant abnormity detection in the refrigeration operation working condition.

Alternatively, analyzing the condition of the refrigerant cycle according to Tr, tp and Tp1 includes: if the absolute Tp1-Tp is less than or equal to T3 and the absolute Tr-Tp is less than or equal to T4, determining that the refrigerant circulation is abnormal; wherein T3 is a third temperature threshold, and T4 is a fourth temperature threshold.

Optionally, analyzing the condition of the refrigerant cycle according to Tr, tp1 and the current state of the compressor includes: and if Tr, tp and Tp1 meet the conditions of the freezing protection or the temperature reaching shutdown of the compressor, and the compressor is not in the freezing protection state or the temperature reaching shutdown state, determining that the refrigerant circulation is abnormal.

Alternatively, tr, tp, and Tp1 satisfy conditions for compressor freeze protection or warm-up shutdown, including: i Tp1-Tp is less than or equal to T5, and I Tr-Tp is less than or equal to T5; wherein T5 is a fifth temperature threshold.

Alternatively, T3 > T5, and T4 > T5, and the T3, T4, T5 are determined according to the Tr.

Optionally, determining T3, T4, and T5 according to the Tr includes: and determining T3, T4 and T5 corresponding to the Tr according to a preset corresponding relation.

Optionally, in the case of an abnormal refrigerant cycle, the method further includes: controlling the compressor to stop; controlling the external fan to stop; and controlling the inner fan to keep running.

Optionally, after controlling the compressor to stop, the method further includes: controlling the compressor to restart under the condition that the accumulated number of times of stopping the compressor is less than a preset value; and keeping the compressor in a stop state under the condition that the accumulated stop times of the compressor is greater than or equal to a preset value.

In some embodiments, the device is applied to the refrigeration operation condition of the air conditioner, and comprises: a processor and a memory storing program instructions, the processor being configured to execute the method for detecting refrigerant anomalies as described above when executing the program instructions.

In some embodiments, the air conditioner includes: the compressor and the heat exchanger also comprise the device for detecting the refrigerant abnormity.

In some embodiments, the storage medium comprises: program instructions are stored which, when run, perform the method for detecting refrigerant anomalies as described above.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic view of an air conditioner;

fig. 2 is a schematic diagram illustrating a method for detecting refrigerant anomaly according to an embodiment of the disclosure;

fig. 3 is a schematic diagram of another method for detecting refrigerant abnormality according to an embodiment of the disclosure;

fig. 4 is a schematic diagram of another method for detecting refrigerant abnormality according to an embodiment of the disclosure;

fig. 5 is a schematic diagram of another method for detecting refrigerant abnormality according to an embodiment of the disclosure;

fig. 6 is a schematic diagram of an apparatus for detecting refrigerant abnormality according to an embodiment of the disclosure.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged as appropriate for the embodiments of the disclosure described herein. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

At present, the refrigerant abnormity of the air conditioner is the most prominent and common problem in the after-sale feedback, the system operation can be in an abnormal state after the refrigerant abnormity of the air conditioner, and the refrigeration effect of the air conditioner can be directly influenced by the refrigerant abnormity of the air conditioner, so the refrigerant abnormity detection is very necessary in the operation process of the air conditioner. In order to solve the problem of the requirement for refrigerant abnormity detection in the refrigeration operation working condition of the air conditioner, the related technology discloses a refrigerant abnormity detection method of the air conditioner. The method comprises the following steps: and after the system is stable, the refrigerant abnormity is detected, and the refrigerant abnormity of the air conditioner is detected by comparing and analyzing the actual indoor coil temperature with the initial indoor coil temperature and the indoor environment temperature respectively. However, when detecting refrigerant abnormality in the related art, the related art does not consider the influence of different current indoor environment temperature ranges and different states of the compressor on the refrigerant abnormality detection result under the refrigeration working condition. Although the related art can detect the refrigerant abnormity under the refrigeration working condition, the detection method is insensitive and is easy to misjudge, and the detection accuracy of the refrigerant abnormity is low.

As shown in fig. 1, an air conditioner generally includes a refrigeration cycle circuit. The refrigeration cycle includes a compressor 11, an outdoor heat exchanger 12, a throttle device 13, an indoor heat exchanger 14, and a four-way valve 15. The air conditioner further includes an electric control device (not shown) including a processor for controlling the operation of the refrigeration cycle. The processor is used for controlling the compressor 11, the adjusting throttling device 13 and other electric control components, thereby realizing various functions of the air conditioner.

The embodiment of the disclosure provides a method and a device for detecting refrigerant abnormity, an air conditioner and a storage medium, so as to improve the accuracy of refrigerant abnormity detection under the refrigeration operation working condition.

In the air conditioner described with reference to fig. 1, an embodiment of the present disclosure provides a method for detecting refrigerant anomaly. As shown in fig. 2, the method includes:

s201, the processor detects the current indoor environment temperature Tr and the current indoor coil temperature Tp under the condition that the continuous operation time length of the compressor is greater than or equal to the preset time length.

Wherein, tr and Tp can be detected by a plurality of temperature sensors arranged on the air conditioner.

The temperature sensor for detecting the Tr is arranged at the position of the air inlet of the indoor unit of the air conditioner, so that the detected Tr is more accurate. The temperature sensor for detecting Tp is arranged at the position of the coil pipe of the indoor unit of the air conditioner, and the real-time temperature detected by the temperature sensor is taken as Tp.

When the continuous operation time of the compressor is longer than or equal to the preset time, the air conditioner starts to refrigerate for a period of time, and the air conditioner enters a stable state. The temperature sensor also enters a stable operation state, and the detected Tr and Tp are stable. Alternatively, if the preset time period is greater than or equal to 20 minutes (min), tr and Tp are more reliably detected.

S202, under the condition that Tr is larger than or equal to T1, the processor analyzes the condition of the refrigerant circulation according to Tr, tp and the initial coil temperature Tp 1.

Wherein T1 is a first temperature threshold. Note that T1 should not be set low. Alternatively, T1. Gtoreq.25 ℃. More specifically, T1 is 25 ℃, 26 ℃ or 27 ℃. If the value of T1 is less than 25 ℃, for example, if Tr is set to 23 ℃, the air conditioner may frost under the cooling operation condition, which causes the compressor to start the freeze protection and enter the shutdown state. In addition, when T1 < 23 ℃, if T1 reaches the set temperature, the compressor is also caused to enter a shutdown state. Therefore, the analysis result of the refrigerant cycle can be more reliable and accurate by setting the temperature T1 to be greater than or equal to 25 ℃.

Under the condition that Tr is larger than or equal to T1 and the air conditioner is in refrigeration operation, the processor can accurately analyze the refrigerant circulation condition according to the temperature abnormal conditions expressed by Tp, tr and Tp1 under the condition.

S203, when T2 is more than or equal to Tr and less than T1, the processor analyzes the condition of the refrigerant circulation according to Tr, tp1 and the current state of the compressor.

Wherein T2 is the second temperature threshold. It should be noted that the minimum set temperature of the air conditioner is generally 16 ℃. Alternatively, 16 ℃ ≦ T2 < 25 ℃. More specifically, T2 is 16 ℃, 17 ℃ or 18 ℃. And T2 is set to be more than or equal to 16 ℃ and less than 25 ℃, so that the analysis result of the refrigerant circulation can be more reliable and accurate.

And when the T2 is more than or equal to Tr and less than T1 and the air conditioner operates in a refrigerating mode, tr is low, the current state of the compressor needs to be considered, and misjudgment caused by the interference of the state of the compressor during judgment and analysis is avoided. The processor can accurately analyze the refrigerant circulation condition by combining the current state of the compressor according to the temperature abnormal conditions expressed by Tp, tr and Tp1 under the condition.

And S204, under the condition that the refrigerant circulation is abnormal, the processor outputs prompt information of the refrigerant circulation abnormality.

In the above embodiment, when the continuous operation time period of the compressor is greater than or equal to the preset time period, the logic analysis is performed on the different Tr ranges respectively. And under the condition that Tr is larger than or equal to T1, judging the heat exchange quantity of the current air conditioner according to Tr, tp and Tp1, and analyzing the refrigerant circulation condition. And under the condition that T2 is not less than Tr and less than T1, judging the heat exchange quantity of the current air conditioner according to Tr, tp and Tp1, and simultaneously, eliminating the misjudgment condition possibly occurring in the detection process by combining the current state of the compressor. The detection method can reduce the probability of misjudgment and improve the accuracy of refrigerant abnormity detection in the refrigeration operation working condition.

Optionally, the outputting, by the processor, the prompt information of the refrigerant circulation abnormality includes: and the abnormal circulation of the refrigerant is prompted through an indicator lamp. For example, the indicator light may flash, or the indicator light may display a particular color.

Optionally, the outputting, by the processor, the prompt message of the abnormal refrigerant circulation includes: prompting and displaying the preset time of the fault code of the refrigerant circulation abnormity through a display screen; or directly displaying the refrigerant circulation abnormal preset time on the display screen. And recording the fault information to the memory after prompting the information. More specifically, the preset time is 3min-6min. Therefore, the judgment result is more stable, and meanwhile, the information of the refrigerant circulation abnormity can be timely and intuitively fed back to the user.

Alternatively, the processor analyzes the condition of the refrigerant circulation according to Tr, tp and Tp1, and comprises: and if the absolute value of Tp1-Tp is less than or equal to T3 and the absolute value of Tr-Tp is less than or equal to T4, determining that the refrigerant circulation is abnormal.

Wherein T3 is a third temperature threshold, and T4 is a fourth temperature threshold. Note that T3 and T4 should not be too large or too small. Alternatively, T3 may be, but is not limited to, between 5 ℃ and 7 ℃ and T4 may be, but is not limited to, between 5 ℃ and 7 ℃. More specifically, T3 is 5 ℃, 6 ℃ or 7 ℃. T4 is 5 ℃, 6 ℃ or 7 ℃. If T3 and T4 are set too large, the absolute value of the difference between Tp and Tp1 may be smaller than or equal to T3, and the absolute value of the difference between Tp and Tr may be smaller than or equal to T4, but at this time, it cannot be said that the heat exchange amount of the air conditioner is low. In this case, the air conditioner may not have a refrigerant circulation abnormality, and erroneous determination may easily occur. If T3 and T4 are set too small, it is difficult to detect a difference between Tp and Tp1 and Tr, that is, it is difficult to detect abnormality in refrigerant circulation. Therefore, the refrigerant circulation abnormity detection can be well realized by setting the T3 and the T4 in the temperature interval, no misjudgment can be caused, no detection omission can be caused when the refrigerant circulation is abnormal, and the accuracy of the refrigerant circulation abnormity detection result is ensured.

If the refrigerant circulation is normal, when Tr is more than or equal to T1 under the refrigeration operation working condition of the air conditioner, the difference value between Tp1 and Tp is larger, and the difference value between Tp and Tr is also larger.

When Tr is more than or equal to T1 under the refrigeration operation condition of the air conditioner, if the difference value between Tp1 and Tp is small and the difference value between Tp and Tr is small, the air conditioner can be judged to have refrigerant circulation abnormity.

Optionally, the processor analyzes the condition of the refrigerant cycle according to Tr, tp1 and the current state of the compressor, and comprises: and if Tr, tp and Tp1 meet the conditions of the freezing protection or the temperature-reaching shutdown of the compressor, and the compressor is not in the freezing protection or the temperature-reaching shutdown state, determining that the refrigerant circulation is abnormal.

If the refrigerant circulation is normal, the compressor is in the state of freezing protection or temperature-reaching shutdown when the condition of freezing protection or temperature-reaching shutdown of the compressor is met under the refrigeration operation working condition of the air conditioner.

When the condition of freezing protection or warm stop of the compressor is met under the refrigeration operation working condition of the air conditioner, if the compressor is not in the state of freezing protection or warm stop, the occurrence of refrigerant circulation abnormity of the air conditioner can be judged.

Alternatively, tr, tp, and Tp1 satisfy conditions for compressor freeze protection or warm-up shutdown, including: and | Tp1-Tp | is less than or equal to T5, and | Tr-Tp | is less than or equal to T5.

Wherein T5 is a fifth temperature threshold. Note that T5 should not be set too large or too small. Alternatively, T5 may be, but is not limited to, between 2 ℃ and 4 ℃. More specifically, T5 is 2 ℃, 3 ℃ or 4 ℃. If T5 is set too large, the absolute value of the difference between Tp and Tp1, tr may be less than or equal to T5, but at this time, it cannot be said that the heat exchange amount of the air conditioner is low currently. In this case, the air conditioner may not have a refrigerant circulation abnormality, and erroneous determination may easily occur. If T5 is set too small, it is difficult to detect the difference between Tp and Tp1, tr, that is, it is difficult to detect the refrigerant circulation abnormality. Therefore, the T5 is set in the temperature interval, refrigerant circulation abnormity detection can be well realized, misjudgment can not occur, detection omission can not occur when the refrigerant circulation is abnormal, and the accuracy of the refrigerant circulation abnormity detection result is ensured.

Under the working condition of refrigerating operation of the air conditioner, when Tr is low, the absolute value of the difference value between Tp1 and Tp is small, and the absolute value of the difference value between Tp and Tr is small, the current heat exchange effect of the air conditioner is poor, and then the condition that the compressor is protected by freezing or stops when reaching the temperature can be judged.

Alternatively, T3 > T5, T4 > T5, and T3, T4, T5 are determined according to Tr.

When Tr is in different temperature intervals, the absolute value of the difference between Tp and Tr is different. The higher Tr is, the better the heat exchange effect of the air conditioner under the refrigerating operation condition is, and the larger the absolute value of the difference value between Tp and Tr is. And the values of T3, T4 and T5 are determined according to Tr, and when Tr is in different temperature ranges, T3, T4 and T5 are set respectively, so that the detection result is more accurate and sensitive.

Optionally, the processor determines T3, T4, T5 according to Tr, including: and the processor determines T3, T4 and T5 corresponding to the Tr according to the preset corresponding relation.

More specifically, an alternative correspondence of Tr and T3, T4 is shown in table 1. An alternative correspondence of Tr and T5 is shown in table 2.

TABLE 1

Tr(℃)	T3(℃)	T4(℃)
			31≤Tr＜34	7	7
28≤Tr＜31	6	6
			25≤Tr＜28	5	5

TABLE 2

Tr(℃)	T5(℃)
		22≤Tr＜25	4
19≤Tr＜22	3
		16≤Tr＜19	2

Referring to fig. 3, another method for detecting refrigerant abnormality according to an embodiment of the present disclosure includes:

s301, the processor detects the current indoor environment temperature Tr and the current indoor coil temperature Tp under the condition that the continuous operation time length of the compressor is greater than or equal to the preset time length.

S302, under the condition that Tr is larger than or equal to T1, the processor analyzes the condition of the refrigerant circulation according to Tr, tp and the initial coil temperature Tp 1.

S303, when T2 is more than or equal to Tr and less than T1, the processor analyzes the condition of the refrigerant circulation according to Tr, tp1 and the current state of the compressor.

And S304, under the condition of abnormal refrigerant circulation, the processor outputs prompt information of the abnormal refrigerant circulation.

S305, the processor controls the compressor to stop; the processor controls the external fan to stop; the processor controls the inner fan to keep running.

Under the condition that the refrigerant circulation is judged to be abnormal, the processor controls the compressor to stop and the external fan to stop, so that the air conditioner can be ensured to operate in a stable and safe environment, and the problem of refrigerant circulation abnormity caused by continuous flowing of the refrigerant is avoided being more serious. For example, under the condition of refrigerant leakage, the compressor and the external fan are controlled to stop, so that the environment pollution caused by the refrigerant leakage can be avoided, and the energy is saved. The processor controls and keeps the inner fan to operate, so that the air conditioner can keep the refrigeration effect through the operation of the inner fan under the condition that the compressor and the outer fan are stopped. Therefore, the phenomenon that the refrigerant circulation is abnormal has great influence on the indoor refrigeration effect and influences the use experience of users is avoided.

Referring to fig. 4, another method for detecting refrigerant abnormality according to an embodiment of the present disclosure includes:

s401, the processor detects the current indoor environment temperature Tr and the current indoor coil temperature Tp under the condition that the continuous operation time length of the compressor is greater than or equal to the preset time length.

S402, under the condition that Tr is larger than or equal to T1, the processor analyzes the condition of the refrigerant circulation according to Tr, tp and the initial coil temperature Tp 1.

S403, when T2 is more than or equal to Tr and less than T1, the processor analyzes the condition of the refrigerant circulation according to Tr, tp1 and the current state of the compressor.

And S404, under the condition that the refrigerant circulation is abnormal, the processor outputs prompt information of the refrigerant circulation abnormality.

S405, the processor controls the compressor to stop; the processor controls the external fan to stop; the processor controls the inner fan to keep running.

S406, after the compressor is controlled to stop, the processor judges whether the stop frequency accumulation of the compressor is smaller than a preset value. If yes, entering S407; if not, the process proceeds to S408.

And S407, the processor controls the compressor to restart.

S408, the processor keeps the compressor in a stop state.

In order to further confirm that the air conditioner has refrigerant circulation abnormity, the air conditioner can be started again to repeatedly carry out the judgment until the accumulated number of times of stopping the compressor is greater than or equal to the preset value. The refrigerant circulation abnormality is determined to be more frequently according to the above conditions, which indicates that the refrigerant circulation abnormality is more likely. Therefore, the refrigerant circulation abnormity is detected for multiple times, and the detection result is more accurate and reliable. When the detection result confirms that the refrigerant circulation is abnormal, the compressor should be kept stopped, and the problem of refrigerant circulation abnormality caused by continuous flow of the refrigerant is avoided to be more serious. And after the information is prompted, the fault information is recorded in a memory, so that after-sale maintenance is facilitated.

More specifically, the preset value can be set according to actual requirements, and when the refrigerant cycle abnormality detection requirement is strict, the preset value can be set to 3 times, 2 times or less; when the requirement for detecting the abnormal refrigerant circulation is not particularly strict, the preset value can be set to 4 times, 5 times or more, and when the abnormal refrigerant circulation occurs for many times, the compressor is kept in a stop state.

Referring to fig. 5, another method for detecting refrigerant abnormality according to an embodiment of the present disclosure includes:

s501, the processor detects the current indoor environment temperature Tr and the current indoor coil temperature Tp under the condition that the continuous operation time of the compressor is longer than or equal to 20 min.

S502, tr is more than or equal to 25 ℃, and | Tp1-Tp | is less than or equal to 5 ℃, and | Tr-Tp | is less than or equal to 5 ℃, the processor judges that the refrigerant circulation is abnormal.

S503, tr is more than or equal to 16 ℃ and less than 25 ℃, tp1-Tp is less than or equal to 2 ℃, tr-Tp is less than or equal to 2 ℃, the compressor is not in freezing protection or in a temperature-reaching shutdown state, and the processor judges that the refrigerant circulation is abnormal.

And S504, under the condition that the refrigerant circulation is abnormal, the processor outputs prompt information of the refrigerant circulation abnormality.

S505, the processor controls the compressor to stop; the processor controls the external fan to stop; the processor controls the inner fan to keep running.

And S506, after the compressor is controlled to stop, judging whether the stop times of the compressor are accumulated to be less than 3 times by the processor. If yes, entering S507; if not, the process proceeds to S508.

And S507, the processor controls the compressor to restart.

S508, the processor keeps the compressor in a stop state.

In the above embodiment, in the case where the compressor continuous operation period is greater than or equal to 20min, the detected Tr, tp are more stable and accurate. Under the condition that Tr is more than or equal to 25 ℃, according to the condition that | Tp1-Tp | is less than or equal to 5 ℃, and | Tr-Tp | is less than or equal to 5 ℃, the heat exchange effect of the current air conditioner is judged to be poor, and then the refrigerant circulation is judged to be abnormal. Under the condition that Tr is more than or equal to 16 ℃ and less than or equal to 25 ℃, judging that the compressor is possibly in a freeze protection state or a temperature-reached shutdown state according to the condition that | Tp1-Tp | is less than or equal to 2 ℃ and | Tr-Tp | is less than or equal to 2 ℃. Under the condition that the compressor is possibly in a freezing protection state or a temperature reaching shutdown state, the compressor is not in the freezing protection state or the temperature reaching shutdown state, and then the refrigerant circulation abnormality can be judged. The embodiment eliminates the possibility of misjudgment in the detection process.

In addition, whether the number of times of stopping the compressor is less than 3 times is judged, and the purpose is to further confirm the abnormal refrigerant circulation of the air conditioner. The above determination is repeated again in the case of less than 3 times until the cumulative number of compressor stops is greater than or equal to 3 times. The method is sensitive and reliable, can reduce the probability of misjudgment and improve the accuracy of refrigerant abnormity detection in the refrigeration operation working condition.

With reference to fig. 6, an apparatus for detecting refrigerant anomaly according to an embodiment of the present disclosure includes a processor (processor) 600 and a memory (memory) 601. Optionally, the device for detecting refrigerant abnormality may further include a Communication Interface (Communication Interface) 602 and a bus 603. The processor 600, the communication interface 602, and the memory 601 may communicate with each other via a bus 603. The communication interface 602 may be used for information transfer. The processor 600 may call logic instructions in the memory 601 to execute the method for detecting refrigerant abnormality according to the above embodiment.

In addition, the logic instructions in the memory 601 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.

The memory 601 is a storage medium and can be used for storing software programs, computer executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 600 executes functional applications and data processing by executing program instructions/modules stored in the memory 601, that is, implements the method for detecting refrigerant abnormality in the foregoing embodiments.

The memory 601 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 601 may include a high speed random access memory, and may also include a non-volatile memory.

The embodiment of the disclosure provides an air conditioner, which comprises the device for detecting the refrigerant abnormity.

The embodiment of the disclosure provides a storage medium, which stores computer-executable instructions configured to execute the method for detecting refrigerant abnormality.

The storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium. A non-transitory storage medium comprising: a U-disk, a portable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other media capable of storing program codes, and may also be a transient storage medium.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising a" \8230; "does not exclude the presence of additional like elements in a process, method or apparatus comprising the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.

Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses, and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims

1. A method for detecting refrigerant abnormity is applied to the refrigeration operation working condition of an air conditioner, and is characterized by comprising the following steps:

detecting the current indoor environment temperature Tr and the current indoor coil temperature Tp under the condition that the continuous operation time length of the compressor is greater than or equal to the preset time length;

under the condition that Tr is larger than or equal to T1, analyzing the refrigerant circulation condition according to Tr, tp and the initial coil temperature Tp 1;

under the condition that T2 is more than or equal to Tr and less than T1, analyzing the condition of refrigerant circulation according to Tr, tp1 and the current state of the compressor;

under the condition of abnormal refrigerant circulation, outputting prompt information of the abnormal refrigerant circulation;

wherein, T1 is a first temperature threshold value, and T2 is a second temperature threshold value.

2. The method of claim 1, wherein analyzing refrigerant circulation based on Tr, tp, and Tp1 comprises:

if the absolute value of Tp1-Tp is less than or equal to T3 and the absolute value of Tr-Tp is less than or equal to T4, judging that the refrigerant circulation is abnormal;

wherein T3 is a third temperature threshold, and T4 is a fourth temperature threshold.

3. The method of claim 2, wherein analyzing the refrigerant cycle based on Tr, tp1 and the current state of the compressor comprises:

and if Tr, tp and Tp1 meet the conditions of the freezing protection or the temperature-reaching shutdown of the compressor, and the compressor is not in the freezing protection or the temperature-reaching shutdown state, determining that the refrigerant circulation is abnormal.

4. The method of claim 3, wherein Tr, tp, and Tp1 satisfy conditions for compressor freeze protection or warm-up shutdown, including:

i Tp1-Tp is less than or equal to T5, and I Tr-Tp is less than or equal to T5;

wherein T5 is a fifth temperature threshold.

5. The method of claim 4, wherein T3 > T5 and T4 > T5, and wherein T3, T4, T5 are determined according to the Tr.

6. The method of claim 5, wherein determining T3, T4, T5 from the Tr comprises:

and determining T3, T4 and T5 corresponding to the Tr according to a preset corresponding relation.

7. The method according to any one of claims 1 to 6, wherein in case of abnormal refrigerant cycle, the method further comprises:

controlling the compressor to stop;

controlling the outer fan to stop;

and controlling the inner fan to keep running.

8. The method of claim 7, wherein after controlling the compressor to shutdown, further comprising:

controlling the compressor to restart under the condition that the accumulated number of times of stopping the compressor is less than a preset value;

and keeping the compressor in a stop state under the condition that the accumulated stop times of the compressor is greater than or equal to a preset value.

9. An apparatus for detecting refrigerant abnormality, applied to a cooling operation condition of an air conditioner, comprising a processor and a memory storing program instructions, wherein the processor is configured to execute the method for detecting refrigerant abnormality according to any one of claims 1 to 8 when executing the program instructions.

10. An air conditioner comprising a compressor and a heat exchanger, characterized by further comprising the apparatus for detecting abnormality of refrigerant according to claim 9.

11. A storage medium storing program instructions which, when executed, perform a method for detecting refrigerant anomalies as claimed in any one of claims 1 to 8.