CN106595152A - Method and device for determining abnormal circulation of air conditioner refrigerant and air conditioner - Google Patents
Method and device for determining abnormal circulation of air conditioner refrigerant and air conditioner Download PDFInfo
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- CN106595152A CN106595152A CN201610937140.0A CN201610937140A CN106595152A CN 106595152 A CN106595152 A CN 106595152A CN 201610937140 A CN201610937140 A CN 201610937140A CN 106595152 A CN106595152 A CN 106595152A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 151
- 230000002159 abnormal effect Effects 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 65
- 238000005057 refrigeration Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 85
- 230000005856 abnormality Effects 0.000 claims description 37
- 238000012423 maintenance Methods 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 21
- 230000006870 function Effects 0.000 description 15
- 238000004378 air conditioning Methods 0.000 description 14
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 13
- 229910052731 fluorine Inorganic materials 0.000 description 13
- 239000011737 fluorine Substances 0.000 description 13
- 238000012545 processing Methods 0.000 description 12
- 238000001816 cooling Methods 0.000 description 7
- 230000007812 deficiency Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0294—Control issues related to the outdoor fan, e.g. controlling speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/031—Sensor arrangements
- F25B2313/0314—Temperature sensors near the indoor heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/24—Low amount of refrigerant in the system
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a method and a device for determining abnormal circulation of a refrigerant of an air conditioner and the air conditioner, wherein the method comprises the following steps: acquiring the indoor environment humidity of the indoor side of the air conditioner and acquiring the evaporator temperature and the indoor environment temperature of the indoor side under the refrigeration mode of the air conditioner; determining a first temperature difference between the indoor environment temperature and the evaporator tube temperature and a second temperature difference between a pre-stored initial evaporator tube temperature and the evaporator tube temperature, and judging whether the first temperature difference and the second temperature difference are less than or equal to respective preset values under the indoor environment humidity; and when the first temperature difference and the second temperature difference are both smaller than or equal to the respective preset values, determining that the refrigerant circulation of the air conditioner is abnormal. The scheme of the invention can overcome the defects of high misjudgment rate, low operation reliability, high maintenance difficulty and the like in the prior art, and realize the beneficial effects of low misjudgment rate, high operation reliability and low maintenance difficulty.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a method and a device for determining air conditioner refrigerant circulation abnormity and an air conditioner, in particular to a method for detecting air conditioner system refrigerant circulation abnormity protection, a device corresponding to the method and an air conditioner with the device.
Background
The split air conditioner (namely split air conditioner) is composed of indoor units (namely indoor units) and outdoor units (namely outdoor units), wherein one indoor unit corresponds to one outdoor unit; the air conditioner has indoor unit and outdoor unit installed separately and connected via pipeline and wire. The common fault maintenance in the split air conditioner is compressor damage, the root causes of the compressor damage mainly include high temperature and heavy current, and the common high temperature damage is generally caused by the lack of refrigerant in the system. Therefore, the lack of the refrigerant of the air conditioning system is effectively detected, so that the protection is an important component in the control of the air conditioning system in time, but the misjudgment rate is high in the detection of whether the refrigerant of the air conditioning system is lack.
In the prior art, the defects of high misjudgment rate, low operation reliability, high maintenance difficulty and the like exist.
Disclosure of Invention
The invention aims to provide a method and a device for determining abnormal refrigerant circulation of an air conditioner and the air conditioner, aiming at overcoming the defect that the misjudgment rate is high in the detection of whether an air conditioning system is lack of refrigerant in the prior art and achieving the effect of improving the detection accuracy.
The invention provides a method for determining abnormal circulation of an air conditioner refrigerant, which comprises the following steps: acquiring the indoor environment humidity of the indoor side of the air conditioner and acquiring the evaporator temperature and the indoor environment temperature of the indoor side under the refrigeration mode of the air conditioner; determining a first temperature difference between the indoor environment temperature and the evaporator tube temperature and a second temperature difference between a pre-stored initial evaporator tube temperature and the evaporator tube temperature, and judging whether the first temperature difference and the second temperature difference are less than or equal to respective preset values under the indoor environment humidity; and when the first temperature difference and the second temperature difference are both smaller than or equal to the respective preset values, determining that the refrigerant circulation of the air conditioner is abnormal.
Optionally, after determining that the refrigerant cycle of the air conditioner is abnormal, the method further includes: performing refrigerant cycle abnormity protection on the air conditioner; and/or at least one of alarming, displaying and sending the abnormal state of the refrigerant circulation of the air conditioner to a preset client side for output.
Optionally, before acquiring the indoor ambient humidity of the indoor side of the air conditioner, the method further includes: when the refrigeration mode is started, acquiring the initial evaporator tube temperature of the indoor side and the initial indoor environment temperature; determining whether an absolute value of an initial temperature difference between the initial evaporator tube temperature and the initial indoor ambient temperature is less than or equal to a first preset value; when the absolute value is smaller than or equal to the first preset value, determining that refrigerant cycle abnormality detection needs to be performed on the air conditioner, and acquiring the indoor environment humidity, the evaporator temperature and the indoor environment temperature when determining that the refrigerant cycle abnormality detection needs to be performed on the air conditioner.
Optionally, after determining that the refrigerant cycle abnormality detection needs to be performed on the air conditioner, the method further includes: storing the initial evaporator tube temperature when the refrigerant cycle abnormality detection needs to be carried out on the air conditioner; and/or, acquiring indoor ambient humidity of the indoor side, comprising: determining whether the running time of a compressor of the air conditioner reaches a first preset time or not; when the operation duration reaches the first preset duration, acquiring the indoor environment humidity of the indoor side detected by a humidity sensor; and/or, acquiring an evaporator tube temperature and an indoor ambient temperature of an indoor side of the air conditioner, including: acquiring the evaporator temperature of the indoor side detected by a bulb and the indoor ambient temperature; and/or, obtaining an initial evaporator tube temperature and an initial indoor ambient temperature of the indoor side, comprising: acquiring the initial evaporator tube temperature of the indoor side detected by a bulb and the initial indoor ambient temperature.
Optionally, determining whether the first temperature difference and the second temperature difference are less than or equal to respective preset values of the indoor ambient humidity includes: determining whether the indoor environment humidity is less than a preset humidity; when the indoor environment humidity is smaller than the preset humidity, the preset value comprises a second preset value and a third preset value; determining whether the first temperature difference is less than or equal to the second preset value and determining whether the second temperature difference is less than or equal to the third preset value; or when the indoor environment humidity is greater than or equal to the preset humidity, the preset value comprises a fourth preset value and a fifth preset value; determining whether the first difference is less than or equal to the fourth preset value and determining whether the second difference is less than or equal to the fifth difference.
Optionally, the determining that the refrigerant cycle of the air conditioner is abnormal includes: when the indoor environment humidity is smaller than the preset humidity, and when the first temperature difference value is smaller than or equal to the second preset value and the second temperature difference value is smaller than or equal to the third preset value, determining that the refrigerant circulation of the air conditioner is abnormal; or when the indoor environment humidity is greater than or equal to the preset humidity, and when the first temperature difference value is less than or equal to the fourth preset value and the second temperature difference value is less than or equal to the fifth preset value, determining that the refrigerant circulation of the air conditioner is abnormal.
Optionally, the determining that the refrigerant cycle of the air conditioner is abnormal further includes: determining whether the first temperature difference and the second temperature difference meet respective preset values within a second preset time period or not;
when the first temperature difference and the second temperature difference both meet the respective preset values within the second preset time, determining that the refrigerant circulation of the air conditioner is abnormal;
and/or the presence of a gas in the gas,
the indoor ambient humidity, comprising: relative humidity or absolute humidity of the indoor environment.
In another aspect, the present invention provides an apparatus for determining abnormal refrigerant circulation of an air conditioner, including: the air conditioner comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the indoor environment humidity of the indoor side of the air conditioner and acquiring the temperature of an evaporator tube of the indoor side and the indoor environment temperature in the refrigeration mode of the air conditioner; the determining unit is used for determining a first temperature difference between the indoor environment temperature and the evaporator tube temperature and a second temperature difference between a pre-stored initial evaporator tube temperature and the evaporator tube temperature, and judging whether the first temperature difference and the second temperature difference are smaller than or equal to respective preset values under the indoor environment humidity; the determining unit is further configured to determine that the refrigerant circulation of the air conditioner is abnormal when the first temperature difference and the second temperature difference are both less than or equal to the respective preset values.
Optionally, the method further comprises: the protection unit is used for performing refrigerant circulation abnormity protection on the air conditioner; and/or the output unit is used for alarming, displaying and sending the abnormal state of the refrigerant circulation of the air conditioner to at least one output of a preset client.
Optionally, the obtaining unit is further configured to obtain an initial evaporator temperature at the indoor side and an initial indoor ambient temperature when the cooling mode is started; the determining unit is further used for determining whether the absolute value of the initial temperature difference between the initial evaporator tube temperature and the initial indoor environment temperature is smaller than or equal to a first preset value; the determining unit is further configured to determine that refrigerant cycle abnormality detection needs to be performed on the air conditioner when the absolute value is less than or equal to the first preset value, so that the indoor environment humidity, the evaporator temperature and the indoor environment temperature are acquired only when the refrigerant cycle abnormality detection needs to be performed on the air conditioner.
Optionally, the method further comprises: the storage unit is used for storing the initial evaporator tube temperature when the refrigerant cycle abnormity of the air conditioner needs to be detected; and/or, an acquisition unit comprising: the operation duration determining module is used for determining whether the operation duration of the compressor of the air conditioner reaches a first preset duration or not; the humidity sensor is used for acquiring the indoor environment humidity of the indoor side detected by the humidity sensor when the operation duration reaches the first preset duration; and/or, the obtaining unit further comprises: a temperature sensing bulb; wherein, by the bulb, the acquiring unit is further configured to acquire the evaporator temperature inside the room and the indoor ambient temperature detected by the bulb; and/or, the acquiring unit is further configured to acquire, through the bulb, the initial evaporator temperature of the indoor side detected by the bulb and the initial indoor ambient temperature.
Optionally, the determining unit includes: the humidity determining module is used for determining whether the indoor environment humidity is less than a preset humidity; the temperature difference determining module is used for determining the preset value including a second preset value and a third preset value when the indoor environment humidity is smaller than the preset humidity; determining whether the first temperature difference is less than or equal to the second preset value and determining whether the second temperature difference is less than or equal to the third preset value; or, the temperature difference determining module is further configured to, when the indoor environment humidity is greater than or equal to the preset humidity, determine that the preset value includes a fourth preset value and a fifth preset value; determining whether the first difference is less than or equal to the fourth preset value and determining whether the second difference is less than or equal to the fifth difference.
Optionally, the determining unit further includes: an abnormal state determination module, configured to determine that refrigerant circulation of the air conditioner is abnormal when the indoor environment humidity is less than the preset humidity, the first temperature difference value is less than or equal to the second preset value, and the second temperature difference value is less than or equal to the third preset value; or, the abnormal state determination module is further configured to determine that refrigerant circulation of the air conditioner is abnormal when the indoor environment humidity is greater than or equal to the preset humidity, the first temperature difference value is less than or equal to the fourth preset value, and the second temperature difference value is less than or equal to the fifth preset value.
Optionally, the determining unit further includes: the detection time length determining module is used for determining whether the first temperature difference and the second temperature difference meet respective preset values within a second preset time length; the abnormal state determination module is further configured to determine that refrigerant circulation of the air conditioner is abnormal when the first temperature difference and the second temperature difference both meet the respective preset values within the second preset time period; and/or, the indoor ambient humidity, comprising: relative humidity or absolute humidity of the indoor environment.
In accordance with another aspect of the present invention, there is provided an air conditioner including: the device for determining the abnormal circulation of the air conditioner refrigerant is described above.
According to the scheme provided by the invention, different using environments of the machine are distinguished, and the corresponding judgment temperature difference is adopted, so that the accuracy of fluorine-lacking protection of the system is improved, and the problems of error protection and untimely protection of the conventional fluorine-lacking protection are solved.
Furthermore, according to the scheme of the invention, the effectiveness of fluorine deficiency protection detection of the air conditioner is greatly enhanced by adopting the corresponding judgment temperature difference according to different working conditions, the reliability of a unit system is improved, and the compressor is prevented from being burnt.
Furthermore, according to the scheme of the invention, the judgment of the humidity is added, and the corresponding judgment temperature difference is adopted, so that the accuracy of the fluorine-lacking protection detection of the system is improved.
Therefore, according to the scheme of the invention, the problem that the misjudgment rate is higher in the detection of whether the air conditioning system is lack of the refrigerant in the prior art is solved by adopting the corresponding temperature difference to judge the fluorine-lacking protection according to different working conditions, so that the defects of high misjudgment rate, low operation reliability and high maintenance difficulty in the prior art are overcome, and the beneficial effects of low misjudgment rate, high operation reliability and low maintenance difficulty are realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic flow chart illustrating an embodiment of a method for determining an abnormal refrigerant circulation of an air conditioner according to the present invention;
FIG. 2 is a schematic flow chart illustrating an embodiment of determining whether refrigerant cycle anomaly detection is required in the method of the present invention;
FIG. 3 is a schematic flow chart illustrating one embodiment of humidity acquisition in the method of the present invention;
FIG. 4 is a schematic flow chart illustrating the determination of temperature differences at different humidities according to one embodiment of the method of the present invention;
FIG. 5 is a flowchart illustrating an embodiment of determining refrigerant cycle abnormalities based on a detection duration according to the method of the present invention;
fig. 6 is a schematic structural diagram of an embodiment of an apparatus for determining an abnormal refrigerant circulation of an air conditioner according to the present invention;
fig. 7 is a schematic diagram illustrating an operation principle of an embodiment of an air conditioner of the present invention.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
102-an obtaining unit; 1022-a run length determination module; 1024 — a humidity sensor; 1026-temperature sensing bulb; 104-a determination unit; 1042-a humidity determination module; 1044-a temperature difference determination module; 1046-abnormal state determination module; 1048-detection duration determining module; 106-a protection unit; 108-an output unit; 110-memory cells.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to an embodiment of the present invention, a method for determining an abnormal circulation of an air conditioning refrigerant is provided, as shown in fig. 1, which is a schematic flow chart of an embodiment of the method of the present invention. The method for determining the abnormal circulation of the air conditioner refrigerant can comprise the following steps:
at step S110, in a cooling mode of the air conditioner, an indoor ambient humidity of an indoor side of the air conditioner is acquired, and an evaporator tube temperature and an indoor ambient temperature of the indoor side are acquired.
For example: in the cooling mode, detection (i.e., detection process of whether there is a refrigerant shortage) is performed.
Therefore, accurate basis can be provided for determining the refrigerant circulation abnormity by acquiring the indoor environment humidity, the evaporator tube temperature and the indoor environment temperature in the refrigeration mode, and the reliability is high.
Optionally, the indoor ambient humidity may include: relative humidity or absolute humidity of the indoor environment.
For example: indoor relative humidity RHInner ring。
Therefore, the convenience and reliability of humidity acquisition and humidity processing can be improved through various forms of humidity.
In an alternative example, the specific process of acquiring the indoor ambient humidity on the indoor side of the air conditioner in step S110 may be further described with reference to the flowchart of an embodiment of humidity acquisition in the method of the present invention shown in fig. 3.
Step S310, determining whether the running time of the compressor of the air conditioner reaches a first preset time.
Step S320, when the operation duration reaches the first preset duration, acquiring the indoor ambient humidity of the indoor side detected by the humidity sensor.
For example: humidity sensors already configured by some models may be utilized.
For example: humidity sensor detects indoor side relative humidity RHInner ring。
For example: when entering the detection, the compressor is started to continuously run t1After that time, the relative humidity RH% of the environment at that time was measured.
Therefore, the humidity is acquired when the compressor operates for the first preset time, so that the acquired humidity is good in stability; the humidity sensor detects the indoor environment humidity, so that the acquired humidity is accurate and the acquisition mode is simple and convenient.
In an optional example, the acquiring of the evaporator temperature and the indoor ambient temperature at the indoor side of the air conditioner in step S110 may include: acquiring the evaporator tube temperature of the indoor side detected by a bulb and the indoor ambient temperature.
For example: the first temperature sensing bulb can detect the temperature T in the indoor side tube (namely the temperature of the evaporator tube on the indoor side)Inner pipeThe second temperature sensing bulb can detect the indoor side environment temperature (namely the indoor environment temperature) TInner ring。
Therefore, the temperature of the evaporator tube and the indoor environment temperature are obtained through the temperature sensing bulb, the obtaining mode is simple and convenient, and the obtained result is reliable.
At step S120, a first temperature difference between the indoor ambient temperature and the evaporator tube temperature and a second temperature difference between a pre-stored initial evaporator tube temperature and the evaporator tube temperature are determined, and it is determined whether the first temperature difference and the second temperature difference are less than or equal to respective preset values at the indoor ambient humidity.
For example: the working conditions of different temperatures and humidity are distinguished, and therefore the judgment of fluorine deficiency protection is carried out by adopting corresponding temperature difference according to different working conditions.
Therefore, whether the first temperature difference and the second temperature difference meet preset values matched with the indoor environment humidity or not is determined, judgment on the humidity is added in corresponding temperature difference judgment, and the accuracy of refrigerant circulation abnormity, namely fluorine lack protection detection, of the air conditioning system can be improved.
In an alternative example, the specific process of determining whether the first temperature difference and the second temperature difference are less than or equal to the respective preset values at the indoor ambient humidity in step S120 may be further described with reference to the flowchart of an embodiment of determining temperature differences at different humidities in the method of the present invention shown in fig. 4.
Step S410, determining whether the indoor ambient humidity is less than a preset humidity.
Step S420, when the indoor environment humidity is less than the preset humidity, the preset value may include a second preset value and a third preset value; determining whether the first temperature difference is less than or equal to the second preset value, and determining whether the second temperature difference is less than or equal to the third preset value. Or,
for example: if RH% < A, detecting whether T is satisfiedInner ring-TInner pipe≤T2And TInner pipe 0-TInner pipe≤T3。
Step S430, when the indoor ambient humidity is greater than or equal to the preset humidity, the preset value may include a fourth preset value and a fifth preset value; determining whether the first difference is less than or equal to the fourth preset value and determining whether the second difference is less than or equal to the fifth difference.
For example: if RH% is more than or equal to A, whether T is satisfied is detectedInner ring-TInner pipe≤T4And TInner pipe 0-TInner pipe≤T5。
Therefore, the relationship between the indoor environment humidity and the preset humidity is determined, the corresponding temperature difference is judged according to the determined relationship, the judgment is carried out by combining the humidity and the temperature difference, the effectiveness of the air conditioner fluorine deficiency protection detection can be greatly enhanced, the reliability of a unit system (namely an air conditioning system) is improved, and the compressor is prevented from being burnt.
In step S130, when the first temperature difference and the second temperature difference are both less than or equal to the respective preset values, it is determined that the refrigerant cycle of the air conditioner is abnormal.
For example: referring to the example shown in fig. 7, different use environments of the machine can be distinguished, and corresponding judgment temperature difference is adopted.
Therefore, when the corresponding temperature difference meets the preset value matched with the indoor environment humidity, the refrigerant circulation abnormity is determined, and the corresponding judgment temperature difference can be adopted on the premise of distinguishing different use environments of the air conditioner, so that the accuracy of fluorine-lacking protection of the air conditioning system is improved.
In an optional example, the determining of the refrigerant circulation abnormality of the air conditioner in step S130 may include: and when the indoor environment humidity is smaller than the preset humidity, and when the first temperature difference value is smaller than or equal to the second preset value and the second temperature difference value is smaller than or equal to the third preset value, determining that the refrigerant circulation of the air conditioner is abnormal. Or,
for example: if RH% < A, T is detectedInner ring-TInner pipe≤T2And TInner pipe 0-TInner pipe≤T3If the above conditions are satisfied at the same time, the protection of 'refrigerant circulation abnormal' is judged.
In an optional example, the determining of the refrigerant circulation abnormality of the air conditioner in step S130 may further include: and when the indoor environment humidity is greater than or equal to the preset humidity, determining that the refrigerant circulation of the air conditioner is abnormal when the first temperature difference value is less than or equal to the fourth preset value and the second temperature difference value is less than or equal to the fifth preset value.
For example: if RH% is greater than or equal to A, T is detectedInner ring-TInner pipe≤T4And TInner pipe 0-TInner pipe≤T5If the above conditions are satisfied at the same time, the protection of 'refrigerant circulation abnormal' is judged.
And the first preset value, the fourth preset value and the fifth preset value are similar. And/or the second preset value is similar to the third preset value. And/or the first preset value is smaller than the second preset value.
For example: the above criteria (e.g., t)1、T1、T2、T3、T4、T5And A), the value assignment can be carried out according to different systems, and the specific reference can be made to the following table 1.
Table 1: value assignment according to different systems
| t1 | T1 | T2 | T3 | T4 | T5 | A |
| 8～10min | 1～3℃ | 2～6℃ | 2～6℃ | 1～3℃ | 1～3℃ | 70～90％ |
From this, through the judged result based on corresponding the difference in temperature under the different indoor environment humidity, confirm whether the refrigerant circulation of air conditioner is unusual under the different indoor environment humidity, can solve lack fluorine protection mistake protection, protect untimely scheduling problem, be favorable to promoting user experience.
In an optional example, the determining of the refrigerant circulation abnormality of the air conditioner in step S130 may further include: and determining the refrigerant circulation abnormity based on the detection time length. Optionally, a specific process of determining the refrigerant circulation abnormality based on the detection duration may be further described with reference to a flowchart of an embodiment of determining the refrigerant circulation abnormality based on the detection duration in the method of the present invention shown in fig. 5.
Step S510, determining whether the first temperature difference and the second temperature difference both satisfy the respective preset values within a second preset time period.
Step S520, determining that the refrigerant circulation of the air conditioner is abnormal when the first temperature difference and the second temperature difference both satisfy the respective preset values within the second preset time period.
For example: continuous t2Time detection of TInner ring-TInner pipe≤T2And TInner pipe 0-TInner pipe≤T3。
For example: continuous t2Time detection of TInner ring-TInner pipe≤T4And TInner pipe 0-TInner pipe≤T5。
Therefore, the judgment of the detection duration is added in the process of determining whether the refrigerant circulation of the air conditioner is abnormal, so that the accuracy of the judgment result of whether the refrigerant circulation of the air conditioner is abnormal is improved, the misjudgment rate is reduced, and the user experience can be improved better.
In an optional embodiment, after determining that the refrigerant cycle of the air conditioner is abnormal in step S130, the method may further include: and performing refrigerant circulation abnormity protection on the air conditioner.
For example: closing all loads of the outdoor unit, such as a compressor and an external fan, keeping the original running state of the indoor fan, and reporting the refrigerant circulation abnormal protection (for example, displaying a corresponding fault code on a line controller).
Therefore, timely protection is carried out when the refrigerant circulation is determined to be abnormal, the reliability and the stability of the operation of the air conditioner can be improved, and the user experience is better.
In an optional embodiment, after determining that the refrigerant cycle of the air conditioner is abnormal in step S130, the method may further include: and alarming, displaying and sending the abnormal state of the refrigerant circulation of the air conditioner to at least one output of a preset client.
Therefore, when the refrigerant circulation is determined to be abnormal, the abnormal state of the refrigerant circulation is output, so that a user can know the abnormal state of the refrigerant circulation of the air conditioner in time and give maintenance in time, and the air conditioner is better in humanization and better in reliability.
In an optional embodiment, before acquiring the indoor ambient humidity at the indoor side of the air conditioner in step S110, the method may further include: and determining whether refrigerant circulation abnormity detection needs to be carried out on the air conditioner. Optionally, a specific process of determining whether refrigerant cycle abnormality detection needs to be performed on the air conditioner may be further defined by referring to a flowchart of an embodiment of determining whether refrigerant cycle abnormality detection needs to be performed in the method of the present invention shown in fig. 2.
Step S210, when the cooling mode is started, acquiring an initial evaporator temperature of the indoor side and an initial indoor ambient temperature.
Alternatively, acquiring the initial evaporator temperature and the initial indoor ambient temperature at the indoor side in step S210 may include: acquiring the initial evaporator tube temperature of the indoor side detected by a bulb and the initial indoor ambient temperature.
Therefore, the initial evaporator tube temperature and the initial indoor environment temperature are obtained through the temperature sensing bulb, the obtaining mode is simple and convenient, and the obtained result is good in accuracy and high in reliability.
Step S220, determining whether an absolute value of an initial temperature difference between the initial evaporator tube temperature and the initial indoor environment temperature is less than or equal to a first preset value.
Step S230, when the absolute value is less than or equal to the first preset value, it is determined that refrigerant cycle abnormality detection needs to be performed on the air conditioner, so that when it is determined that refrigerant cycle abnormality detection needs to be performed on the air conditioner, the indoor environment humidity, the evaporator temperature, and the indoor environment temperature are obtained.
For example: detecting initial-T in the refrigeration modeInner ring 0-TInner pipe 0│≤T1And entering detection (namely, detection process of whether the refrigerant is lacked).
Therefore, whether refrigerant circulation abnormity detection is needed or not is determined when the refrigeration mode is started, so that timely detection can be performed when needed, and the reliability and humanization can be well guaranteed; the detection is not carried out when not needed, so that the normal operation of a refrigeration mode is not influenced on one hand, and the energy-saving effect is good on the other hand.
In an optional example, after determining that the refrigerant cycle abnormality detection needs to be performed on the air conditioner in step S230, the method may further include: and storing the initial evaporator tube temperature when the refrigerant cycle abnormity of the air conditioner needs to be detected.
Therefore, the initial evaporator tube temperature is stored when the refrigerant cycle abnormity detection is determined to be needed, so that the initial evaporator tube temperature can be conveniently called at any time in the refrigerant cycle abnormity detection, and the detection is more convenient; in addition, the initial evaporator tube temperature required to be subjected to refrigerant cycle abnormality detection is used for refrigerant cycle abnormality detection, so that the detection result is more accurate and reliable.
A large number of tests verify that the technical scheme of the embodiment is adopted, different using environments of the machine are distinguished, the corresponding judgment temperature difference is adopted, the accuracy of fluorine-lacking protection of the system is improved, and the problems of error protection and untimely protection of the existing fluorine-lacking protection are solved.
According to the embodiment of the invention, the device for determining the abnormal circulation of the air-conditioning refrigerant is also provided, which corresponds to the method for determining the abnormal circulation of the air-conditioning refrigerant. Referring to fig. 6, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The apparatus for determining abnormality in refrigerant circulation of an air conditioner may include: an acquisition unit 102 and a determination unit 104.
In an example, the obtaining unit 102 may be configured to obtain an indoor ambient humidity of an indoor side of the air conditioner, and obtain an evaporator temperature of the indoor side and an indoor ambient temperature in a cooling mode of the air conditioner. The specific functions and processes of the acquiring unit 102 are referred to in step S110.
For example: in the cooling mode, detection (i.e., detection process of whether there is a refrigerant shortage) is performed.
Therefore, accurate basis can be provided for determining the refrigerant circulation abnormity by acquiring the indoor environment humidity, the evaporator tube temperature and the indoor environment temperature in the refrigeration mode, and the reliability is high.
Optionally, the indoor ambient humidity may include: relative humidity or absolute humidity of the indoor environment.
For example: indoor relative humidity RHInner ring。
Therefore, the convenience and reliability of humidity acquisition and humidity processing can be improved through various forms of humidity.
Optionally, the obtaining unit 102 may include: a run length determination module 1022 and a humidity sensor 1024.
In an alternative specific example, the operation duration determining module 1022 may be configured to determine whether the operation duration of the compressor of the air conditioner reaches a first preset duration. The specific functions and processes of the operation duration determining module 1022 are shown in step S310.
In an optional specific example, the humidity sensor 1024 may be configured to acquire the indoor ambient humidity of the indoor side detected by the humidity sensor 1024 when the operation duration reaches the first preset duration. The specific function and processing of the humidity sensor 1024 are shown in step S320.
For example: humidity sensors already configured by some models may be utilized.
For example: humidity sensor detects indoor side relative humidity RHInner ring。
For example: when entering the detection, the compressor is started to continuously run t1After that time, the relative humidity RH% of the environment at that time was measured.
Therefore, the humidity is acquired when the compressor operates for the first preset time, so that the acquired humidity is good in stability; the humidity sensor detects the indoor environment humidity, so that the acquired humidity is accurate and the acquisition mode is simple and convenient.
Optionally, the obtaining unit 102 may further include: a bulb 1026.
In an optional specific example, the obtaining unit 102 may be further configured to obtain, through the thermal bulb 1026, the temperature of the evaporator on the indoor side and the indoor ambient temperature detected by the thermal bulb 1026.
For example: the first temperature sensing bulb can detect the temperature T in the indoor side tube (namely the temperature of the evaporator tube on the indoor side)Inner pipeThe second temperature sensing bulb can detect the indoor side environment temperature (namely the indoor environment temperature) TInner ring。
Therefore, the temperature of the evaporator tube and the indoor environment temperature are obtained through the temperature sensing bulb, the obtaining mode is simple and convenient, and the obtained result is reliable.
In an example, the determining unit 104 may be configured to determine a first temperature difference between the indoor ambient temperature and the evaporator tube temperature, and a second temperature difference between a pre-stored initial evaporator tube temperature and the evaporator tube temperature, and determine whether the first temperature difference and the second temperature difference are less than or equal to respective preset values at the indoor ambient humidity. The specific function and processing of the determination unit 104 are referred to in step S120.
For example: the working conditions of different temperatures and humidity are distinguished, and therefore the judgment of fluorine deficiency protection is carried out by adopting corresponding temperature difference according to different working conditions.
Therefore, whether the first temperature difference and the second temperature difference meet preset values matched with the indoor environment humidity or not is determined, judgment on the humidity is added in corresponding temperature difference judgment, and the accuracy of refrigerant circulation abnormity, namely fluorine lack protection detection, of the air conditioning system can be improved.
Optionally, the determining unit 104 may include: a humidity determination module 1042 and a temperature difference determination module 1044.
In an alternative embodiment, the humidity determining module 1042 may be configured to determine whether the indoor environment humidity is less than a preset humidity. The specific function and processing of the humidity determining module 1042 are shown in step S410.
In an optional specific example, the temperature difference determining module 1044 may be configured to, when the indoor ambient humidity is less than the preset humidity, enable the preset value to include a second preset value and a third preset value. Determining whether the first temperature difference is less than or equal to the second preset value, and determining whether the second temperature difference is less than or equal to the third preset value. The specific function and processing of the temperature difference determination module 1044 are as shown in step S420.
For example: if RH% < A, detecting whether T is satisfiedInner ring-TInner pipe≤T2And TInner pipe 0-TInner pipe≤T3。
In an optional specific example, the temperature difference determining module 1044 may be further configured to, when the indoor ambient humidity is greater than or equal to the preset humidity, enable the preset value to include a fourth preset value and a fifth preset value. Determining whether the first difference is less than or equal to the fourth preset value and determining whether the second difference is less than or equal to the fifth difference. The specific function and processing of the temperature difference determination module 1044 are further referred to in step S430.
For example: if RH% is more than or equal to A, whether T is satisfied is detectedInner ring-TInner pipe≤T4And TInner pipe 0-TInner pipe≤T5。
Therefore, the relationship between the indoor environment humidity and the preset humidity is determined, the corresponding temperature difference is judged according to the determined relationship, the judgment is carried out by combining the humidity and the temperature difference, the effectiveness of the air conditioner fluorine deficiency protection detection can be greatly enhanced, the reliability of a unit system (namely an air conditioning system) is improved, and the compressor is prevented from being burnt.
In an example, the determining unit 104 may be further configured to determine that a refrigerant cycle of the air conditioner is abnormal when the first temperature difference and the second temperature difference are both less than or equal to the respective preset values. The specific function and processing of the determination unit 104 are also referred to in step S130.
For example: referring to the example shown in fig. 7, different use environments of the machine can be distinguished, and corresponding judgment temperature difference is adopted.
Therefore, when the corresponding temperature difference meets the preset value matched with the indoor environment humidity, the refrigerant circulation abnormity is determined, and the corresponding judgment temperature difference can be adopted on the premise of distinguishing different use environments of the air conditioner, so that the accuracy of fluorine-lacking protection of the air conditioning system is improved.
Optionally, the determining unit 104 may further include: an abnormal state determination module 1046.
In an optional specific example, the abnormal state determining module 1046 may be configured to determine that a refrigerant circulation of the air conditioner is abnormal when the indoor ambient humidity is less than the preset humidity, and when the first temperature difference is less than or equal to the second preset value and the second temperature difference is less than or equal to the third preset value. Or,
for example: if RH% < A, T is detectedInner ring-TInner pipe≤T2And TInner pipe 0-TInner pipe≤T3If the above conditions are satisfied at the same time, the protection of 'refrigerant circulation abnormal' is judged.
In an optional specific example, the abnormal state determining module 1046 may be further configured to determine that a refrigerant circulation of the air conditioner is abnormal when the indoor ambient humidity is greater than or equal to the preset humidity, and when the first temperature difference value is less than or equal to the fourth preset value and the second temperature difference value is less than or equal to the fifth preset value.
For example: if RH% is greater than or equal to A, T is detectedInner ring-TInner pipe≤T4And TInner pipe 0-TInner pipe≤T5If the above conditions are satisfied at the same time, the protection of 'refrigerant circulation abnormal' is judged.
And the first preset value, the fourth preset value and the fifth preset value are similar. And/or the second preset value is similar to the third preset value. And/or the first preset value is smaller than the second preset value.
For example: the above criteria (e.g., t)1、T1、T2、T3、T4、T5And A), the value assignment can be carried out according to different systems, and the specific reference can be made to the following table 1.
Table 1: value assignment according to different systems
| t1 | T1 | T2 | T3 | T4 | T5 | A |
| 8～10min | 1～3℃ | 2～6℃ | 2～6℃ | 1～3℃ | 1～3℃ | 70～90％ |
From this, through the judged result based on corresponding the difference in temperature under the different indoor environment humidity, confirm whether the refrigerant circulation of air conditioner is unusual under the different indoor environment humidity, can solve lack fluorine protection mistake protection, protect untimely scheduling problem, be favorable to promoting user experience.
Optionally, the determining unit 104 may further include: a detection duration determination module 1048.
In an optional specific example, the detection duration determining module 1048 may be configured to determine whether the first temperature difference and the second temperature difference both satisfy the respective preset values within a second preset duration. The specific functions and processing of the detection duration determining module 1048 are referred to in step S510.
In an optional specific example, the abnormal state determining module 1046 may be further configured to determine that a refrigerant cycle of the air conditioner is abnormal when the first temperature difference and the second temperature difference both meet the respective preset values within the second preset time period. The specific functions and processes of the abnormal state determination module 1046 are shown in step S520.
For example: continuous t2Time detection of TInner ring-TInner pipe≤T2And TInner pipe 0-TInner pipe≤T3。
For example: continuous t2Time detection of TInner ring-TInner pipe≤T4And TInner pipe 0-TInner pipe≤T5。
Therefore, the judgment of the detection duration is added in the process of determining whether the refrigerant circulation of the air conditioner is abnormal, so that the accuracy of the judgment result of whether the refrigerant circulation of the air conditioner is abnormal is improved, the misjudgment rate is reduced, and the user experience can be improved better.
In an alternative embodiment, the method may further include: a protection unit 106, and/or an output unit 108.
In an optional example, the protection unit 106 may be configured to perform refrigerant cycle abnormality protection on the air conditioner.
For example: closing all loads of the outdoor unit, such as a compressor and an external fan, keeping the original running state of the indoor fan, and reporting the refrigerant circulation abnormal protection (for example, displaying a corresponding fault code on a line controller).
Therefore, timely protection is carried out when the refrigerant circulation is determined to be abnormal, the reliability and the stability of the operation of the air conditioner can be improved, and the user experience is better.
In an optional example, the output unit 108 may be configured to perform at least one of an alarm, a display, and an output sent to a preset client for a state of refrigerant cycle abnormality of the air conditioner.
Therefore, when the refrigerant circulation is determined to be abnormal, the abnormal state of the refrigerant circulation is output, so that a user can know the abnormal state of the refrigerant circulation of the air conditioner in time and give maintenance in time, and the air conditioner is better in humanization and better in reliability.
In an optional embodiment, the obtaining unit 102 and the determining unit 104 may be further configured to determine whether refrigerant cycle abnormality detection needs to be performed on the air conditioner.
In an optional example, the obtaining unit 102 may be further configured to obtain an initial evaporator temperature at the indoor side and an initial indoor ambient temperature when the cooling mode is activated. The specific functions and processes of the acquisition unit 102 are also referred to in step S210.
Optionally, the obtaining unit 102 may be further configured to obtain, through the thermal bulb 1026, the initial evaporator temperature inside the room and the initial indoor ambient temperature detected by the thermal bulb 1026.
Therefore, the initial evaporator tube temperature and the initial indoor environment temperature are obtained through the temperature sensing bulb, the obtaining mode is simple and convenient, and the obtained result is good in accuracy and high in reliability.
In an optional example, the determining unit 104 may be further configured to determine whether an absolute value of an initial temperature difference between the initial evaporator tube temperature and the initial indoor environment temperature is less than or equal to a first preset value. The specific function and processing of the determination unit 104 are also referred to in step S220.
In an optional example, the determining unit 104 may be further configured to determine that refrigerant cycle abnormality detection needs to be performed on the air conditioner when the absolute value is less than or equal to the first preset value, so as to obtain the indoor environment humidity, the evaporator temperature, and the indoor environment temperature only when it is determined that refrigerant cycle abnormality detection needs to be performed on the air conditioner. The specific function and processing of the determination unit 104 are also referred to in step S230.
For example: detecting initial-T in the refrigeration modeInner ring 0-TInner pipe 0│≤T1And entering detection (namely, detection process of whether the refrigerant is lacked).
Therefore, whether refrigerant circulation abnormity detection is needed or not is determined when the refrigeration mode is started, so that timely detection can be performed when needed, and the reliability and humanization can be well guaranteed; the detection is not carried out when not needed, so that the normal operation of a refrigeration mode is not influenced on one hand, and the energy-saving effect is good on the other hand.
In an optional example, the method may further include: a memory unit 110.
Optionally, the storage unit 110 may be configured to store the initial evaporator tube temperature when the refrigerant cycle abnormality of the air conditioner needs to be detected.
Therefore, the initial evaporator tube temperature is stored when the refrigerant cycle abnormity detection is determined to be needed, so that the initial evaporator tube temperature can be conveniently called at any time in the refrigerant cycle abnormity detection, and the detection is more convenient; in addition, the initial evaporator tube temperature required to be subjected to refrigerant cycle abnormality detection is used for refrigerant cycle abnormality detection, so that the detection result is more accurate and reliable.
Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method shown in fig. 1 to 5, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.
Through a large number of tests, the technical scheme of the invention greatly enhances the effectiveness of fluorine deficiency protection detection of the air conditioner, improves the reliability of a unit system and avoids the burning of a compressor by adopting corresponding judgment temperature differences according to different working conditions.
According to the embodiment of the invention, the air conditioner corresponding to the determination device of the abnormal circulation of the air conditioner refrigerant is also provided. This air conditioner includes: the device for determining the abnormal circulation of the air conditioner refrigerant is described above.
In one example, the process of detecting whether there is a refrigerant shortage in the air conditioner may include: and judging through comparing the changes of the inner side pipe temperature and the inner side environment temperature.
Therefore, the detection process is simple in detection mode, applicable to most working conditions and high in requirement for setting of the temperature change value. However, under the working condition of high temperature and high humidity, because the latent heat of the system accounts for a large proportion, the temperature difference between the evaporator tube temperature and the ambient temperature is relatively low, and if the same temperature difference is adopted to judge the lack of fluorine, the judgment may be mistaken.
In one example, in the air conditioner, a humidity sensor already configured in some models may be used in the process of detecting whether the refrigerant is lacking.
For example: the temperature difference judging method can be used for distinguishing the working conditions of different temperatures and humidity, and accordingly the judgment of fluorine deficiency protection is carried out by adopting the corresponding temperature difference according to different working conditions.
In an optional example, in the air conditioner, in the process of detecting whether the refrigerant is absent, referring to the example shown in fig. 7, different use environments of the machine may be distinguished, and the corresponding judgment temperature difference is adopted.
Alternatively, the first bulb may detect the temperature T in the indoor side tube (i.e., the evaporator tube temperature on the indoor side)Inner pipeThe second temperature sensing bulb can detect the indoor side environment temperature (namely the indoor environment temperature) TInner ringThe humidity sensor detects the relative humidity RH of the indoor sideInner ring。
Optionally, the process of detecting whether there is a refrigerant shortage may include:
step 1, detecting initial | T in the refrigeration modeInner ring 0-TInner pipe 0│≤T1And entering detection (namely, detection process of whether the refrigerant is lacked).
Step 2, starting the compressor to continuously run t when entering detection1After that time, the relative humidity RH% of the environment at that time was measured.
In a more alternative embodiment, if RH% < A, t continues2Time detection of TInner ring-TInner pipe≤T2And TInner pipe 0-TInner pipe≤T3If the above conditions are satisfied at the same time, the protection of 'refrigerant circulation abnormal' is judged.
In a more alternative embodiment, if RH%. gtoreq.A, t continues2Time detection of TInner ring-TInner pipe≤T4And TInner pipe 0-TInner pipe≤T5If the above conditions are satisfied at the same time, the protection of 'refrigerant circulation abnormal' is judged.
Wherein each of the above criteria (e.g., t)1、T1、T2、T3、T4、T5And A), the value assignment can be carried out according to different systems, and the specific reference can be made to the following table 1.
Table 1: value assignment according to different systems
| t1 | T1 | T2 | T3 | T4 | T5 | A |
| 8～10min | 1～3℃ | 2～6℃ | 2～6℃ | 1～3℃ | 1～3℃ | 70～90％ |
Since the processing and functions of the air conditioner of this embodiment are basically corresponding to the embodiments, principles and examples of the apparatus shown in fig. 6, the description of this embodiment is not given in detail, and reference may be made to the related descriptions in the embodiments, which are not described herein again.
A large number of tests prove that by adopting the technical scheme of the invention, the accuracy of fluorine-deficient protection detection of the system is improved by adding judgment on humidity and adopting corresponding judgment temperature difference.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (15)
1. A method for determining abnormal circulation of air conditioner refrigerant is characterized by comprising the following steps:
acquiring the indoor environment humidity, the evaporator temperature and the indoor environment temperature of the indoor side of the air conditioner in the refrigeration mode of the air conditioner;
determining a first temperature difference between the indoor environment temperature and the evaporator tube temperature and a second temperature difference between a pre-stored initial evaporator tube temperature and the evaporator tube temperature, and judging whether the first temperature difference and the second temperature difference are less than or equal to respective preset values under the indoor environment humidity;
and when the first temperature difference and the second temperature difference are both smaller than or equal to the respective preset values, determining that the refrigerant circulation of the air conditioner is abnormal.
2. The method of claim 1, wherein after determining that the refrigerant cycle of the air conditioner is abnormal, the method further comprises:
performing refrigerant cycle abnormity protection on the air conditioner; and/or at least one of alarming, displaying and sending the abnormal state of the refrigerant circulation of the air conditioner to a preset client side for output.
3. The method of claim 1 or 2, wherein prior to obtaining the indoor ambient humidity of the indoor side of the air conditioner, further comprising:
when the refrigeration mode is started, acquiring the initial evaporator tube temperature of the indoor side and the initial indoor environment temperature;
determining whether an absolute value of an initial temperature difference between the initial evaporator tube temperature and the initial indoor ambient temperature is less than or equal to a first preset value;
when the absolute value is smaller than or equal to the first preset value, determining that refrigerant cycle abnormality detection needs to be performed on the air conditioner, and acquiring the indoor environment humidity, the evaporator temperature and the indoor environment temperature when determining that the refrigerant cycle abnormality detection needs to be performed on the air conditioner.
4. The method of claim 3,
after determining that the refrigerant cycle abnormality detection needs to be performed on the air conditioner, the method further comprises the following steps:
storing the initial evaporator tube temperature when the refrigerant cycle abnormality detection needs to be carried out on the air conditioner;
and/or the presence of a gas in the gas,
obtaining an indoor ambient humidity of the indoor side, comprising:
determining whether the running time of a compressor of the air conditioner reaches a first preset time or not;
when the operation duration reaches the first preset duration, acquiring the indoor environment humidity of the indoor side detected by a humidity sensor;
and/or the presence of a gas in the gas,
acquiring an evaporator tube temperature and an indoor ambient temperature of an indoor side of the air conditioner, including:
acquiring the evaporator temperature of the indoor side detected by a bulb and the indoor ambient temperature;
and/or the presence of a gas in the gas,
acquiring an initial evaporator temperature and an initial indoor ambient temperature of the indoor side, including:
acquiring the initial evaporator tube temperature of the indoor side detected by a bulb and the initial indoor ambient temperature.
5. The method of claim 3 or 4, wherein determining whether the first temperature difference and the second temperature difference are less than or equal to respective predetermined values at the indoor ambient humidity comprises:
determining whether the indoor environment humidity is less than a preset humidity;
when the indoor environment humidity is smaller than the preset humidity, the preset value comprises a second preset value and a third preset value; determining whether the first temperature difference is less than or equal to the second preset value and determining whether the second temperature difference is less than or equal to the third preset value; or,
when the indoor environment humidity is greater than or equal to the preset humidity, the preset value comprises a fourth preset value and a fifth preset value; determining whether the first difference is less than or equal to the fourth preset value and determining whether the second difference is less than or equal to the fifth difference.
6. The method of claim 5, wherein determining the refrigerant cycle abnormality of the air conditioner comprises:
when the indoor environment humidity is smaller than the preset humidity, and when the first temperature difference value is smaller than or equal to the second preset value and the second temperature difference value is smaller than or equal to the third preset value, determining that the refrigerant circulation of the air conditioner is abnormal; or,
and when the indoor environment humidity is greater than or equal to the preset humidity, determining that the refrigerant circulation of the air conditioner is abnormal when the first temperature difference value is less than or equal to the fourth preset value and the second temperature difference value is less than or equal to the fifth preset value.
7. The method according to one of claims 1 to 6,
determining that the refrigerant circulation of the air conditioner is abnormal, further comprising:
determining whether the first temperature difference and the second temperature difference meet respective preset values within a second preset time period or not;
when the first temperature difference and the second temperature difference both meet the respective preset values within the second preset time, determining that the refrigerant circulation of the air conditioner is abnormal;
and/or the presence of a gas in the gas,
the indoor ambient humidity, comprising: relative humidity or absolute humidity of the indoor environment.
8. An apparatus for determining abnormality in refrigerant circulation of an air conditioner, comprising:
the air conditioner comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the indoor environment humidity of the indoor side of the air conditioner and acquiring the temperature of an evaporator tube of the indoor side and the indoor environment temperature in the refrigeration mode of the air conditioner;
the determining unit is used for determining a first temperature difference between the indoor environment temperature and the evaporator tube temperature and a second temperature difference between a pre-stored initial evaporator tube temperature and the evaporator tube temperature, and judging whether the first temperature difference and the second temperature difference are smaller than or equal to respective preset values under the indoor environment humidity;
the determining unit is further configured to determine that the refrigerant circulation of the air conditioner is abnormal when the first temperature difference and the second temperature difference are both less than or equal to the respective preset values.
9. The apparatus of claim 8, further comprising:
the protection unit is used for performing refrigerant circulation abnormity protection on the air conditioner; and/or the presence of a gas in the gas,
and the output unit is used for alarming, displaying and sending at least one output to a preset client side for the abnormal refrigerant circulation state of the air conditioner.
10. The apparatus of claim 8 or 9, wherein,
the obtaining unit is further configured to obtain an initial evaporator temperature at the indoor side and an initial indoor ambient temperature when the refrigeration mode is started;
the determining unit is further used for determining whether the absolute value of the initial temperature difference between the initial evaporator tube temperature and the initial indoor environment temperature is smaller than or equal to a first preset value;
the determining unit is further configured to determine that refrigerant cycle abnormality detection needs to be performed on the air conditioner when the absolute value is less than or equal to the first preset value, so that the indoor environment humidity, the evaporator temperature and the indoor environment temperature are acquired only when the refrigerant cycle abnormality detection needs to be performed on the air conditioner.
11. The apparatus of claim 10,
further comprising:
the storage unit is used for storing the initial evaporator tube temperature when the refrigerant cycle abnormity of the air conditioner needs to be detected;
and/or the presence of a gas in the gas,
an acquisition unit comprising:
the operation duration determining module is used for determining whether the operation duration of the compressor of the air conditioner reaches a first preset duration or not;
the humidity sensor is used for acquiring the indoor environment humidity of the indoor side detected by the humidity sensor when the operation duration reaches the first preset duration;
and/or the presence of a gas in the gas,
an acquisition unit, further comprising: a temperature sensing bulb; wherein,
the acquisition unit is also used for acquiring the temperature of the evaporator on the indoor side and the indoor environment detected by the temperature sensing bulb through the temperature sensing bulb;
and/or the presence of a gas in the gas,
the acquisition unit is also configured to acquire, by the bulb, the initial evaporator temperature inside the room and the initial indoor ambient temperature detected by the bulb.
12. The apparatus according to claim 10 or 11, wherein the determining unit comprises:
the humidity determining module is used for determining whether the indoor environment humidity is less than a preset humidity;
the temperature difference determining module is used for determining the preset value including a second preset value and a third preset value when the indoor environment humidity is smaller than the preset humidity; determining whether the first temperature difference is less than or equal to the second preset value and determining whether the second temperature difference is less than or equal to the third preset value; or,
the temperature difference determining module is further configured to, when the indoor environment humidity is greater than or equal to the preset humidity, determine that the preset value includes a fourth preset value and a fifth preset value; determining whether the first difference is less than or equal to the fourth preset value and determining whether the second difference is less than or equal to the fifth difference.
13. The apparatus of claim 12, wherein the determining unit further comprises:
an abnormal state determination module, configured to determine that refrigerant circulation of the air conditioner is abnormal when the indoor environment humidity is less than the preset humidity, the first temperature difference value is less than or equal to the second preset value, and the second temperature difference value is less than or equal to the third preset value; or,
the abnormal state determination module is further configured to determine that refrigerant circulation of the air conditioner is abnormal when the indoor environment humidity is greater than or equal to the preset humidity, the first temperature difference value is less than or equal to the fourth preset value, and the second temperature difference value is less than or equal to the fifth preset value.
14. The apparatus according to one of claims 8 to 13,
a determination unit, further comprising:
the detection time length determining module is used for determining whether the first temperature difference and the second temperature difference meet respective preset values within a second preset time length;
the abnormal state determination module is further configured to determine that refrigerant circulation of the air conditioner is abnormal when the first temperature difference and the second temperature difference both meet the respective preset values within the second preset time period;
and/or the presence of a gas in the gas,
the indoor ambient humidity, comprising: relative humidity or absolute humidity of the indoor environment.
15. An air conditioner, comprising: the apparatus for determining an abnormality in a refrigerant circulation of an air conditioner according to any one of claims 8 to 14.
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| CN107477791A (en) * | 2017-08-23 | 2017-12-15 | 绵阳美菱软件技术有限公司 | A kind of air-conditioning leakage fluorine detection method, device and air-conditioning system |
| CN107477791B (en) * | 2017-08-23 | 2019-08-30 | 四川虹美智能科技有限公司 | A kind of air-conditioning leakage fluorine detection method, device and air-conditioning system |
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| CN113883657A (en) * | 2021-11-09 | 2022-01-04 | 宁波奥克斯电气股份有限公司 | A kind of air conditioner outer coil temperature sensor falling off control method and air conditioner |
| CN113883657B (en) * | 2021-11-09 | 2023-01-24 | 宁波奥克斯电气股份有限公司 | Air conditioner external coil temperature sensor falling control method and air conditioner |
| CN115164441A (en) * | 2022-07-21 | 2022-10-11 | 珠海格力电器股份有限公司 | Heat pump system, water heater, air conditioner and control method of heat pump system |
| CN116045450A (en) * | 2022-12-22 | 2023-05-02 | 珠海格力电器股份有限公司 | Air conditioner control method and device, air conditioner and storage medium |
| CN116045450B (en) * | 2022-12-22 | 2024-11-08 | 珠海格力电器股份有限公司 | Air conditioner control method and device, air conditioner and storage medium |
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