CN107477775B - Air conditioner refrigerant leakage detection method and device, storage equipment, terminal and air conditioner - Google Patents
Air conditioner refrigerant leakage detection method and device, storage equipment, terminal and air conditioner Download PDFInfo
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- CN107477775B CN107477775B CN201710665706.3A CN201710665706A CN107477775B CN 107477775 B CN107477775 B CN 107477775B CN 201710665706 A CN201710665706 A CN 201710665706A CN 107477775 B CN107477775 B CN 107477775B
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 188
- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 77
- 238000010438 heat treatment Methods 0.000 claims description 65
- 238000012937 correction Methods 0.000 claims description 53
- 238000005057 refrigeration Methods 0.000 claims description 37
- 238000001816 cooling Methods 0.000 claims description 16
- 230000000007 visual effect Effects 0.000 claims description 14
- 230000000977 initiatory effect Effects 0.000 claims description 11
- 230000007547 defect Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 18
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 17
- 229910052731 fluorine Inorganic materials 0.000 description 17
- 239000011737 fluorine Substances 0.000 description 17
- 238000012545 processing Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 8
- 238000009833 condensation Methods 0.000 description 6
- 230000005494 condensation Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Abstract
The invention discloses a method and a device for detecting a refrigerant leakage of an air conditioner, a storage device, a terminal and the air conditioner, wherein the method comprises the following steps: acquiring current operation state parameters of the air conditioner; determining a reference temperature difference of the air conditioner according to the current operating state parameter, and determining a heat exchange temperature difference between a compressor and a heat exchanger of the air conditioner; and determining the proportion of the refrigerant leakage of the air conditioner according to the difference value between the heat exchange temperature difference and the reference temperature difference and a set calculation coefficient. The scheme of the invention can overcome the defects of high detection difficulty, poor protection timeliness, short service life and the like in the prior art, and has the beneficial effects of low detection difficulty, good protection timeliness and long service life.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a method, a device, a storage device, a terminal and an air conditioner for detecting refrigerant leakage of the air conditioner, in particular to a method for detecting fluorine leakage of the air conditioner with a fixed rotating speed, a device corresponding to the method, the storage device storing the method, the terminal capable of executing the method and the air conditioner with the device or the storage device.
Background
A fixed frequency air conditioner is a set for providing a space area (generally an enclosed space) with air temperature change. The constant-frequency air conditioner has less available operation parameters and less protection functions, and when the refrigerant leakage of the air conditioner is less than 50%, the conventional fluorine-lacking logic cannot be protected in time. Experiments show that when the fluorine leakage rate is more than 10%, the air conditioning system can be protected untimely in different degrees, so that the compressor is frequently overloaded, and the service life of the compressor is greatly reduced.
In the prior art, the judgment of lack of fluorine can be carried out by utilizing conditions such as an inner ring (for example, the indoor environment temperature), an inner pipe (a heat exchange pipe of an indoor heat exchanger), current (for example, the current of a compressor and the like), but the judgment can only be used for a frequency converter and is not suitable for a fixed frequency converter. Therefore, the development of the fluorine leakage early warning function of the fixed frequency machine is necessary.
In the prior art, the defects of high detection difficulty, poor protection timeliness, short service life and the like exist.
Disclosure of Invention
The invention aims to provide a method and a device for detecting a refrigerant leakage of an air conditioner, a storage device, a terminal and the air conditioner, aiming at the defects, so as to solve the problem of high difficulty in detecting the refrigerant lack of the constant-frequency air conditioner in the prior art and achieve the effect of convenient detection.
The invention provides a method for detecting a refrigerant leakage of an air conditioner, which comprises the following steps: acquiring current operation state parameters of the air conditioner; determining a reference temperature difference of the air conditioner according to the current operating state parameter, and determining a heat exchange temperature difference between a compressor and a heat exchanger of the air conditioner; and determining the proportion of the refrigerant leakage of the air conditioner according to the difference value between the heat exchange temperature difference and the reference temperature difference and a set calculation coefficient.
Optionally, obtaining the current operating state parameter of the air conditioner includes: determining whether the running time of the air conditioner after starting up reaches a first set time; and receiving the current running state parameters collected by a sensing device after the running time reaches the first set time.
Optionally, the current operating state parameter includes: outdoor ambient temperature and indoor ambient temperature; determining a reference temperature difference of the air conditioner, including: and determining the reference temperature difference corresponding to the current indoor environment temperature and the current outdoor environment temperature according to the corresponding relation among the set indoor environment temperature, the set outdoor environment temperature and the set reference temperature difference.
Optionally, the current operating state parameter further includes: compressor discharge temperature and heat exchanger tube temperature; the heat exchanger tube temperature includes: the temperature of the outdoor heat exchanger tube in a cooling mode or the temperature of the indoor heat exchanger tube in a heating mode; determining a heat exchange temperature difference between a compressor and a heat exchanger of the air conditioner, comprising: determining a difference between the compressor discharge temperature and the outdoor heat exchanger tube temperature as the heat exchange temperature difference in the cooling mode; or, in the heating mode, determining a difference value between the compressor discharge temperature and the indoor heat exchanger tube temperature as the heat exchange temperature difference.
Optionally, the method further comprises: determining whether the proportion of the leaked refrigerant is larger than or equal to the lower limit of a set range; and when the refrigerant leakage ratio is greater than or equal to the lower limit of the set range, prompting.
Optionally, the initiating the prompt includes: prompting in at least one of the following forms through a panel of the air conditioner and/or a set client side: displaying the refrigerant proportion and/or the code matched with the refrigerant leakage proportion; emitting at least one of an audible and visual prompt and a voice prompt; wherein the audible and visual prompt comprises: alarming in a buzzing mode; and lightening a warning lamp.
Optionally, the method further comprises: determining whether the proportion of the leaked refrigerant is smaller than the upper limit of the set range; when the proportion of the refrigerant leakage is smaller than the upper limit of the set range, determining a membership interval of the proportion of the refrigerant leakage between the lower limit of the set range and the upper limit of the set range; determining a correction value corresponding to the membership interval according to a second corresponding relation between a set refrigerant leakage interval and a set correction value; and correcting the protection logic related to the heat exchanger tube temperature according to the correction value so as to ensure that the protection logic operates normally.
Optionally, the method further comprises: storing a first corresponding relationship between a set indoor ambient temperature, a set outdoor ambient temperature and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode; and/or storing a second corresponding relation between the set refrigerant leakage interval and the set correction value.
In another aspect, the present invention provides a device for detecting refrigerant leakage of an air conditioner, including: the acquisition unit is used for acquiring the current running state parameter of the air conditioner; the determining unit is used for determining the reference temperature difference of the air conditioner according to the current running state parameter and determining the heat exchange temperature difference between a compressor and a heat exchanger of the air conditioner; the determining unit is further used for determining the proportion of the refrigerant leakage of the air conditioner according to the difference value between the heat exchange temperature difference and the reference temperature difference and a set calculation coefficient.
Optionally, obtaining the current operating state parameter of the air conditioner includes: determining whether the running time of the air conditioner after starting up reaches a first set time; and receiving the current running state parameters collected by a sensing device after the running time reaches the first set time.
Optionally, the current operating state parameter includes: outdoor ambient temperature and indoor ambient temperature; the determining unit determines the reference temperature difference of the air conditioner, and specifically includes: and determining the reference temperature difference corresponding to the current indoor environment temperature and the current outdoor environment temperature according to the corresponding relation among the set indoor environment temperature, the set outdoor environment temperature and the set reference temperature difference.
Optionally, the current operating state parameter further includes: compressor discharge temperature and heat exchanger tube temperature; the heat exchanger tube temperature includes: the temperature of the outdoor heat exchanger tube in a cooling mode or the temperature of the indoor heat exchanger tube in a heating mode; the determining unit determines the heat exchange temperature difference between the compressor and the heat exchanger of the air conditioner, and specifically comprises the following steps: determining a difference between the compressor discharge temperature and the outdoor heat exchanger tube temperature as the heat exchange temperature difference in the cooling mode; or, in the heating mode, determining a difference value between the compressor discharge temperature and the indoor heat exchanger tube temperature as the heat exchange temperature difference.
Optionally, the method further comprises: the determining unit is further used for determining whether the proportion of the leaked refrigerant is larger than or equal to the lower limit of a set range; and the prompting unit is used for initiating a prompt when the refrigerant leakage ratio is greater than or equal to the lower limit of the set range.
Optionally, the prompting unit initiates a prompt, specifically including: prompting in at least one of the following forms through a panel of the air conditioner and/or a set client side: displaying the refrigerant proportion and/or the code matched with the refrigerant leakage proportion; emitting at least one of an audible and visual prompt and a voice prompt; wherein the audible and visual prompt comprises: alarming in a buzzing mode; and lightening a warning lamp.
Optionally, the method further comprises: the determining unit is further used for determining whether the proportion of the leaked refrigerant is smaller than the upper limit of the set range; the determining unit is further configured to determine a membership interval of the refrigerant leakage ratio between the lower limit of the setting range and the upper limit of the setting range when the refrigerant leakage ratio is smaller than the upper limit of the setting range; the determining unit is further used for determining the correction value corresponding to the membership interval according to a second corresponding relation between the set refrigerant leakage interval and the set correction value; and the determining unit is also used for correcting the protection logic related to the heat exchanger tube temperature according to the correction value so as to ensure that the protection logic operates normally.
Optionally, the method further comprises: a storage unit for storing a first correspondence between a set indoor ambient temperature, a set outdoor ambient temperature, and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode; and/or the storage unit is also used for storing a second corresponding relation between the set leakage refrigerant medium interval and the set correction value.
In accordance with the above method, a further aspect of the present invention provides a storage device, comprising: a plurality of instructions are stored in the storage device; the instructions are used for loading and executing the method for detecting the refrigerant leakage of the air conditioner by the processor.
In accordance with the above method, a further aspect of the present invention provides a terminal, including: a processor for executing a plurality of instructions; a memory to store a plurality of instructions; the instructions are stored in the memory, and are loaded by the processor and execute the method for detecting the refrigerant leakage of the air conditioner.
In accordance with the above apparatus, or storage device, a further aspect of the present invention provides an air conditioner, comprising: the above-mentioned refrigerant leakage detection device for an air conditioner, or the above-mentioned storage device.
According to the scheme, whether the air conditioner leaks the refrigerant (such as fluorine leakage) is judged through logic, prompt warning is achieved for a user, the refrigerant leakage detection difficulty is reduced, and the protection timeliness is good.
Furthermore, according to the scheme of the invention, the condition of refrigerant leakage can be reminded in time, so that the compressor can be protected from frequent overload, and the reliability is improved.
Furthermore, according to the scheme of the invention, when the fluorine leakage of the air conditioner is 10% -50%, the air conditioner can effectively warn to prompt a user to carry out after-sales treatment, so that the air conditioner is prevented from operating in a severe environment for a long time, and the service life reliability of the air conditioner is improved.
Furthermore, according to the scheme of the invention, the protection is more timely by correcting the related protection parameters, so that the reliability of the operation of the air conditioner and the user experience are improved.
Furthermore, the scheme of the invention prompts under the condition of not influencing the normal use of the user, and has good use convenience and humanization.
Therefore, according to the scheme of the invention, the reference temperature difference and the heat exchange temperature difference are determined by obtaining the current operating state parameters of the air conditioner, so that the proportion of the leaked refrigerant is determined, and the problem of high detection difficulty of the leaked refrigerant of the constant-frequency air conditioner in the prior art is solved, so that the defects of high detection difficulty, low protection timeliness and short service life in the prior art are overcome, and the beneficial effects of low detection difficulty, high protection timeliness and long service life 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 a method for detecting refrigerant leakage of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating an embodiment of obtaining a current operating state parameter according to the method of the present invention;
FIG. 3 is a flowchart illustrating an embodiment of initiating a prompt when the ratio of leaked refrigerant is large according to the method of the present invention;
FIG. 4 is a schematic flow chart illustrating one embodiment of correcting the tube temperature in the method of the present invention;
FIG. 5 is a schematic structural diagram of a refrigerant leakage detecting device of an air conditioner according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a refrigerant leakage detection process according to an embodiment of the air conditioner of the present invention;
fig. 7 is a graph illustrating a heat exchange temperature difference and a refrigerant leakage amount according to an embodiment of the 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; 104-a determination unit; 106-a prompt unit; 108-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 detecting a refrigerant leakage of an air conditioner 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 detecting the refrigerant leakage of the air conditioner can comprise the following steps:
at step S110, a current operation state parameter of the air conditioner is acquired.
Optionally, a specific process of acquiring the current operating state parameter of the air conditioner in step S110 may be further described with reference to a flowchart of an embodiment of the method of the present invention illustrated in fig. 2.
Step S210, determining whether the running time of the air conditioner after being started reaches a first set time (for example, 5-15 min).
Step S220, receiving the current operating state parameters collected by a sensing device (e.g., an ambient temperature sensor, a compressor discharge temperature sensor, a heat exchanger tube temperature sensor, etc.) when the operating time reaches the first set time.
For example: and acquiring the current running state parameters of the air conditioner after the air conditioner is started and runs for a first set time.
For example: and (5) after starting up and starting up for t time (the value range is 5-15min), acquiring the current running state parameters of the prototype.
Therefore, the current running state parameters of the air conditioner are acquired after the air conditioner runs for the first set time, so that more accurate current running state parameters can be acquired when the air conditioner runs stably, and the reliability is high.
At step S120, a reference temperature difference of the air conditioner is determined according to the current operating state parameter, and a heat exchange temperature difference between a compressor and a heat exchanger of the air conditioner is determined. The reference temperature difference can be determined according to the outdoor environment temperature and the indoor environment temperature, and can be used as a reference value for determining whether the air conditioner leaks the refrigerant.
Optionally, the current operating state parameter may include: outdoor ambient temperature and indoor ambient temperature.
In an alternative example, the determining the reference temperature difference of the air conditioner in step S120 may include: and determining the reference temperature difference corresponding to the current indoor environment temperature and the current outdoor environment temperature according to the corresponding relation among the set indoor environment temperature, the set outdoor environment temperature and the set reference temperature difference.
For example: inside ambient temperature TInner ringOutside ambient temperature TOuter ringAnd the method is used for confirming the operation condition of the prototype, and obtaining the preset △ T by table lookup0As a reference temperature difference.
For example, the temperature difference value to be referred to is judged whether the refrigerant leaks or not, and the temperature difference value is related to the inner ring, the outer ring and the refrigeration and heating mode, so that the range of the inner ring and the outer ring where the prototype is located is required, and the reference △ T is obtained by looking up a table0The value is obtained.
△T0The statistical data obtained by experiments, different from the changes of the inner ring and the outer ring, can be preset in the program by a table look-up method.
The following table was used in the cooling mode:
the following table was used in heating mode:
therefore, the reference temperature difference corresponding to the current indoor environment temperature and the current outdoor environment temperature is determined by utilizing a table look-up mode based on the set relation between the indoor environment temperature and the outdoor environment temperature and the reference temperature difference, and the determination mode is simple and convenient and has high reliability.
Optionally, the current operating state parameter may further include: compressor discharge temperature and heat exchanger tube temperature.
Wherein, the heat exchanger tube temperature may include: the outdoor heat exchanger tube temperature in the cooling mode (for example, the outdoor heat exchanger tube temperature), or the indoor heat exchanger tube temperature in the heating mode (for example, the indoor heat exchanger tube temperature).
In an alternative example, determining a heat exchange temperature difference between a compressor and a heat exchanger of the air conditioner may include: determining a difference between the compressor discharge temperature and the outdoor heat exchanger tube temperature as the heat exchange temperature difference in the cooling mode; or, in the heating mode, determining a difference value between the compressor discharge temperature and the indoor heat exchanger tube temperature as the heat exchange temperature difference.
For example: obtaining compressor exhaust temperature value T under refrigeration modeRow boardTube temperature T of external heat exchangerOuter tubeObtaining the exhaust temperature value T of the compressor in the heating modeRow boardTube temperature T of indoor heat exchangerInner pipeAnd calculating the condensation temperature difference value.
For example, the condensation temperature difference value △ T is calculated, △ T is T when refrigeration is carried outRow board-TOuter tube△ T ═ T in heatingRow board-TInner pipe。
From this, through obtaining the reference difference in temperature based on indoor outer ambient temperature to obtain the heat transfer difference in temperature through compressor exhaust temperature and heat exchanger pipe temperature, obtain mode safety, reliable, it is good to obtain the accurate nature of result.
In step S130, a refrigerant leakage ratio of the air conditioner is determined according to a difference between the heat exchange temperature difference and the reference temperature difference and a set calculation coefficient.
For example, by matching preset △ T0By comparison, the refrigerant leakage ratio X ═ a (△ T- △ T) can be estimated0)]％，10％≤X≤50％。
Wherein a is a scale factor, and is related to refrigerant filling amount through experimental fitting.
For example, fig. 7 shows △ T ═ T obtained by a heating mode experiment under a certain conditionRow board-TInner pipeGraph with refrigerant leakage, thereby △ T under the working condition0The value is 50 ℃, the scaling factor a is 1.1, when the refrigerant leaks 300g (18%), △ T is calculated to be 66 ℃, and the formula X is ═ a (△ T- △ T)0)]% is calculated to obtain X of 17.6%, when refrigerant leaks to 450g (28%), △ T is calculated to obtain 76 deg.C, X of 28.6% is calculated, and the formula is basically fitted to reality.
For example: the solution of this embodiment requires a decision based on the difference between the actual operation and the predetermined value, and is preferably used in a fixed frequency machine, and can be evolved in a frequency converter, but the correlation needs to be optimized.
For example: the existing fluorine leakage protection in conventional use judges whether a refrigerating/heating effect exists or not according to whether the parameter changes slightly after a period of time and before starting up, has the limitation that the protection function can be realized only under the condition of more fluorine leakage, and generally has the effect when more than 50% of fluorine leakage exists; the scheme can make up for the defects in the prior art, the leaked fluorine can be detected when 10% -50% of the leaked fluorine is detected, the detection efficiency is high, and the detection and control timeliness is good.
Therefore, the reference temperature difference and the heat exchange temperature difference are determined by obtaining the current running state parameter of the air conditioner, the refrigerant leakage ratio is further determined, the detection is convenient, and the reliability is high.
In an alternative embodiment, the method may further include: and a prompt process is initiated when the proportion of the leaked refrigerant is large.
Optionally, a specific process of initiating the prompt when the refrigerant leakage ratio is large may be further described with reference to a flowchart of an embodiment of initiating the prompt when the refrigerant leakage ratio is large in the method of the present invention shown in fig. 3.
Step S310, determining whether the proportion of the leakage refrigerant is larger than the lower limit of a set range (for example, 10-50%).
Step S320, when the refrigerant leakage ratio is greater than or equal to the lower limit of the set range, initiating a prompt.
For example: when the ratio X is larger than 10%, the user can be prompted to leak the refrigerant.
Therefore, the prompt is sent when the proportion of the leaked refrigerant is large so as to prompt a user to maintain in time, on one hand, the normal use of the user can be ensured, on the other hand, the safe operation of the air conditioner can be protected, and the service life of the compressor is prolonged.
In an optional example, the initiating the prompt may include: prompting in at least one of the following forms through a panel of the air conditioner and/or a set client side: displaying the refrigerant proportion and/or the code matched with the refrigerant leakage proportion; emitting at least one of an audible and visual prompt and a voice prompt; and lightening a warning lamp.
Wherein, the acousto-optic prompt may include: and (5) alarming in a buzzing mode.
For example: the suggestion mode accessible panel display code sends modes such as buzzing alarm, lights warning light, intelligent APP, but does not influence user normal use.
Therefore, through prompting in various forms, the flexibility is good, and the reliability is high.
In an alternative embodiment, the method may further include: and correcting the temperature of the tube.
Optionally, a specific process of correcting the tube temperature may be further described with reference to a flow diagram of an embodiment of correcting the tube temperature in the method of the present invention shown in fig. 4.
And step S410, determining whether the proportion of the leaked refrigerant is smaller than the upper limit of the set range.
Step S420, when the refrigerant leakage ratio is smaller than the upper limit of the setting range, determining a membership interval of the refrigerant leakage ratio between the lower limit of the setting range and the upper limit of the setting range.
And step S430, determining the correction value corresponding to the membership interval according to the second corresponding relation between the set refrigerant leakage interval and the set correction value.
And step S440, correcting the protection logic related to the heat exchanger tube temperature according to the correction value so as to enable the protection logic to normally operate. For example: and correcting other protection logics related to the pipe temperature, and avoiding the other logics from losing protection effect due to refrigerant leakage.
For example: and when the air conditioner leaks refrigerant, correcting the pipe temperature in the corresponding protection logic of the heating inner pipe temperature or the refrigerating outer pipe temperature of the air conditioner. For example: and correcting the tube temperature value in the protection logic according to the position of the refrigerant leakage ratio in the set range and the correction coefficient corresponding to the position, so that the protection logic normally moves.
For example: correcting protection logics related to the heating inner pipe temperature and the refrigerating outer pipe temperature, such as logics for preventing high temperature, overhigh inner pipe temperature, overload and the like, and enabling the protection logics to normally operate by correcting parameter values of the inner pipe temperature and the outer pipe temperature. In the case of fluorine leakage, the tube temperature values in the protection logic were corrected as follows based on the above calculated X values (data are for reference only, confirmed specifically from experimental data of different prototypes).
(Note: +1 indicates that if the actual tube temperature detection value is A, A is made to be A +1 as the detection value)
For example: in the logic related to the pipe temperature, the detected value is corrected by a certain value and then used as a detection value to carry out logic judgment, the logic meets the rule when the refrigerant is not leaked, and timely protection is well carried out, for example, if the high-temperature prevention logic requires that the air conditioner needs to be protected when the inner pipe is higher than 60 ℃, if the refrigerant is not leaked at the moment, the exhaust temperature can be 120 ℃, but because the refrigerant is leaked, if the inner pipe is protected again at 60 ℃, the exhaust possibly exceeds 130 ℃, the reliability of the air conditioner is influenced, the correction is needed, if the correction is +5 ℃, the protection can be carried out when the temperature is actually detected to be 55 ℃, and the reliability is improved.
Therefore, the temperature of the heat exchanger tube in the corresponding protection logic is corrected when the proportion of the refrigerant leakage is large, the refrigerant leakage situation of the air conditioner can be timely processed, and the air conditioner is high in reliability and good in safety.
In an alternative embodiment, the method may further include: a first correspondence between the set indoor ambient temperature, the set outdoor ambient temperature, and the set reference temperature difference is stored.
Wherein the first corresponding relationship may include: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode.
Optionally, the method may further include: and storing a second corresponding relation between the set refrigerant leakage interval and the set correction value.
Optionally, the stored corresponding relationship may be subjected to maintenance processing such as learning and updating, so as to improve accuracy and reliability of determination of the ratio of the leaked refrigerant.
Therefore, the proportion of the leaked refrigerant can be conveniently determined and corrected by pre-storing the corresponding relation, and the processing efficiency and the reliability are high.
Through a large number of tests, the technical scheme of the embodiment is adopted to logically judge whether the air conditioner leaks the refrigerant (such as fluorine leakage) or not, so that the prompt and the warning are realized for the user, the detection difficulty of the leaked refrigerant is reduced, and the protection timeliness is good.
According to the embodiment of the invention, the invention further provides a device for detecting the refrigerant leakage of the air conditioner, which corresponds to the method for detecting the refrigerant leakage of the air conditioner. Referring to fig. 5, a schematic diagram of an embodiment of the apparatus of the present invention is shown. The refrigerant leakage detecting device of the air conditioner may include: an acquisition unit 102 and a determination unit 104.
In an optional example, the obtaining unit 102 may be configured to obtain a current operating state parameter of the air conditioner. The specific functions and processes of the acquiring unit 102 are referred to in step S110.
Optionally, the obtaining unit 102 obtains the current operating state parameter of the air conditioner, which may specifically include: and determining whether the running time of the air conditioner after being started reaches a first set time (for example, 5-15 min). The specific functions and processes of the acquisition unit 102 are also referred to in step S210.
Optionally, the obtaining unit 102 obtains the current operating state parameter of the air conditioner, and may further include: and receiving the current operating state parameters collected by a sensing device (such as an ambient temperature sensor, a compressor exhaust temperature sensor, a heat exchanger pipe temperature sensor and the like) when the operating time reaches the first set time. The specific function and processing of the acquisition unit 102 are also referred to in step S220.
For example: and acquiring the current running state parameters of the air conditioner after the air conditioner is started and runs for a first set time.
For example: and (5) after starting up and starting up for t time (the value range is 5-15min), acquiring the current running state parameters of the prototype.
Therefore, the current running state parameters of the air conditioner are acquired after the air conditioner runs for the first set time, so that more accurate current running state parameters can be acquired when the air conditioner runs stably, and the reliability is high.
In an alternative example, the determining unit 104 may be configured to determine a reference temperature difference of the air conditioner according to the current operating state parameter, and determine a heat exchange temperature difference between a compressor and a heat exchanger of the air conditioner. The reference temperature difference can be determined according to the outdoor environment temperature and the indoor environment temperature, and can be used for determining whether the air conditioner leaks the refrigerant. The specific function and processing of the determination unit 104 are referred to in step S120.
Optionally, the current operating state parameter may include: outdoor ambient temperature and indoor ambient temperature.
In an optional specific example, the determining unit 104 determines the reference temperature difference of the air conditioner, and specifically may include: and determining the reference temperature difference corresponding to the current indoor environment temperature and the current outdoor environment temperature according to the corresponding relation among the set indoor environment temperature, the set outdoor environment temperature and the set reference temperature difference.
For example: inside ambient temperature TInner ringOutside ambient temperature TOuter ringAnd the method is used for confirming the operation condition of the prototype, and obtaining the preset △ T by table lookup0As a reference temperature difference.
For example, the temperature difference value to be referred to is judged whether the refrigerant leaks or not, and the temperature difference value is related to the inner ring, the outer ring and the refrigeration and heating mode, so that the range of the inner ring and the outer ring where the prototype is located is required, and the reference △ T is obtained by looking up a table0The value is obtained.
△T0The statistical data obtained by experiments, different from the changes of the inner ring and the outer ring, can be preset in the program by a table look-up method.
The following table was used in the cooling mode:
the following table was used in heating mode:
therefore, the reference temperature difference corresponding to the current indoor environment temperature and the current outdoor environment temperature is determined by utilizing a table look-up mode based on the set relation between the indoor environment temperature and the outdoor environment temperature and the reference temperature difference, and the determination mode is simple and convenient and has high reliability.
Optionally, the current operating state parameter may further include: compressor discharge temperature and heat exchanger tube temperature.
Wherein, the heat exchanger tube temperature may include: the outdoor heat exchanger tube temperature in the cooling mode (for example, the outdoor heat exchanger tube temperature), or the indoor heat exchanger tube temperature in the heating mode (for example, the indoor heat exchanger tube temperature).
In an optional specific example, the determining unit 104 determines a heat exchange temperature difference between a compressor and a heat exchanger of the air conditioner, and specifically may include: determining a difference between the compressor discharge temperature and the outdoor heat exchanger tube temperature as the heat exchange temperature difference in the cooling mode; or, in the heating mode, determining a difference value between the compressor discharge temperature and the indoor heat exchanger tube temperature as the heat exchange temperature difference.
For example: obtaining compressor exhaust temperature value T under refrigeration modeRow boardTube temperature T of external heat exchangerOuter tubeObtaining the exhaust temperature value T of the compressor in the heating modeRow boardTube temperature T of indoor heat exchangerInner pipeAnd calculating the condensation temperature difference value.
For example, the condensation temperature difference value △ T is calculated, △ T is T when refrigeration is carried outRow board-TOuter tube△ T ═ T in heatingRow board-TInner pipe。
From this, through obtaining the reference difference in temperature based on indoor outer ambient temperature to obtain the heat transfer difference in temperature through compressor exhaust temperature and heat exchanger pipe temperature, obtain mode safety, reliable, it is good to obtain the accurate nature of result.
In an optional example, the determining unit 104 may be further configured to determine a refrigerant leakage ratio of the air conditioner according to a difference between the heat exchange temperature difference and the reference temperature difference and a set calculation coefficient. The specific function and processing of the determination unit 104 are also referred to in step S130.
For example, by matching preset △ T0By comparison, the refrigerant leakage ratio X ═ a (△ T- △ T) can be estimated0)]％，10％≤X≤50％。
Wherein a is a scale factor, and is related to refrigerant filling amount through experimental fitting.
For example, fig. 7 shows △ T ═ T obtained by a heating mode experiment under a certain conditionRow board-TInner pipeGraph with refrigerant leakage, thereby △ T under the working condition0The value is 50 ℃, the scaling factor a is 1.1, when the refrigerant leaks 300g (18%), △ T is calculated to be 66 ℃, and the formula X is ═ a (△ T- △ T)0)]% is calculated to obtain X of 17.6%, when refrigerant leaks to 450g (28%), △ T is calculated to obtain 76 deg.C, X of 28.6% is calculated, and the formula is basically fitted to reality.
Therefore, the reference temperature difference and the heat exchange temperature difference are determined by obtaining the current running state parameter of the air conditioner, the refrigerant leakage ratio is further determined, the detection is convenient, and the reliability is high.
In an alternative embodiment, the method may further include: and a prompt process is initiated when the proportion of the leaked refrigerant is large.
In an optional example, the determining unit 104 may be further configured to determine whether the leaked refrigerant ratio is greater than a lower limit of a set range (e.g., 10% to 50%). The specific function and processing of the determination unit 104 are also referred to in step S310.
In an optional example, the prompting unit 106 may be configured to initiate a prompt when the refrigerant leakage ratio is greater than or equal to a lower limit of the set range. The specific function and processing of the presentation unit 106 are also referred to in step S320.
For example: when the ratio X is larger than 10%, the user can be prompted to leak the refrigerant.
Therefore, the prompt is sent when the proportion of the leaked refrigerant is large so as to prompt a user to maintain in time, on one hand, the normal use of the user can be ensured, on the other hand, the safe operation of the air conditioner can be protected, and the service life of the compressor is prolonged.
Optionally, the prompting unit 106 initiates a prompt, which specifically includes: prompting in at least one of the following forms through a panel of the air conditioner and/or a set client side: displaying the refrigerant proportion and/or the code matched with the refrigerant leakage proportion; emitting at least one of an audible and visual prompt and a voice prompt; and lightening a warning lamp.
Wherein, the acousto-optic prompt may include: and (5) alarming in a buzzing mode.
For example: the suggestion mode accessible panel display code sends modes such as buzzing alarm, lights warning light, intelligent APP, but does not influence user normal use.
Therefore, through prompting in various forms, the flexibility is good, and the reliability is high.
In an alternative embodiment, the method may further include: and correcting the temperature of the tube.
In an optional example, the determining unit 104 may be further configured to determine whether the ratio of the leaked refrigerant is smaller than an upper limit of the setting range. The specific function and processing of the determination unit 104 are also referred to in step S410.
In an optional example, the determining unit 104 may be further configured to determine, when the coolant leakage ratio is smaller than the upper limit of the setting range, a membership range of the coolant leakage ratio between the lower limit of the setting range and the upper limit of the setting range. The specific function and processing of the determination unit 104 are also referred to step S420.
In an optional example, the determining unit 104 may be further configured to determine the correction value corresponding to the membership interval according to a second correspondence relationship between the set refrigerant-leakage interval and the set correction value. The specific function and processing of the determination unit 104 are also referred to in step S430.
In an optional example, the determining unit 104 may be further configured to modify the protection logic related to the heat exchanger tube temperature according to the modification value, so that the protection logic operates normally. The specific function and processing of the determination unit 104 are also referred to in step S440.
For example: and when the air conditioner leaks refrigerant, correcting the pipe temperature in the corresponding protection logic of the heating inner pipe temperature or the refrigerating outer pipe temperature of the air conditioner. For example: and correcting the tube temperature value in the protection logic according to the position of the refrigerant leakage ratio in the set range and the correction coefficient corresponding to the position, so that the protection logic normally moves.
For example: correcting protection logics related to the heating inner pipe temperature and the refrigerating outer pipe temperature, such as logics for preventing high temperature, overhigh inner pipe temperature, overload and the like, and enabling the protection logics to normally operate by correcting parameter values of the inner pipe temperature and the outer pipe temperature. In the case of fluorine leakage, the tube temperature values in the protection logic were corrected as follows based on the above calculated X values (data are for reference only, confirmed specifically from experimental data of different prototypes).
| Correction value | |
| 10％＜X | A0(reference value 0) |
| 10％≤X＜20％ | A1(reference value +1) |
| 20％≤X＜30％ | A2(reference value +2) |
| 30％≤X＜40％ | A3(reference value +4) |
| 40％≤X＜50％ | A4(reference value +6) |
(Note: +1 indicates that if the actual tube temperature detection value is A, A is made to be A +1 as the detection value)
For example: in the logic related to the pipe temperature, the detected value is corrected by a certain value and then used as a detection value to carry out logic judgment, the logic meets the rule when the refrigerant is not leaked, and timely protection is well carried out, for example, if the high-temperature prevention logic requires that the air conditioner needs to be protected when the inner pipe is higher than 60 ℃, the refrigerant is not leaked at the moment, the temperature is possibly 120 ℃, but the refrigerant is leaked, if the inner pipe is protected again at 60 ℃, the exhaust gas possibly exceeds 130 ℃, the reliability of the air conditioner is influenced, the correction is needed, and if the correction is carried out at +5 ℃, the protection can be carried out when the temperature is actually detected to be 55 ℃, so that the reliability is improved.
Therefore, the temperature of the heat exchanger tube in the corresponding protection logic is corrected when the proportion of the refrigerant leakage is large, the refrigerant leakage situation of the air conditioner can be timely processed, and the air conditioner is high in reliability and good in safety.
In an alternative embodiment, the method may further include: storing the procedures of the first correspondence, the second correspondence, and the like.
In an alternative example, the storage unit 108 may be configured to store a first correspondence between a set indoor ambient temperature, a set outdoor ambient temperature, and a set reference temperature difference.
Wherein the first corresponding relationship may include: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode.
Optionally, the storage unit 108 may be further configured to store a second corresponding relationship between the set refrigerant-leakage interval and the set correction value.
Optionally, the stored corresponding relationship may be subjected to maintenance processing such as learning and updating, so as to improve accuracy and reliability of determination of the ratio of the leaked refrigerant.
Therefore, the proportion of the leaked refrigerant can be conveniently determined and corrected by pre-storing the corresponding relation, and the processing efficiency and the reliability are high.
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 4, 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 can protect the compressor from frequent overload and improve the reliability by reminding the condition of refrigerant leakage in time.
According to the embodiment of the invention, the storage equipment corresponding to the method for detecting the refrigerant leakage of the air conditioner is also provided. The storage device may include: a plurality of instructions are stored in the storage device; the instructions are used for loading and executing the method for detecting the refrigerant leakage of the air conditioner by the processor.
Since the processing and functions implemented by the storage device of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to fig. 4, details are not described in the description of this embodiment, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.
A large number of tests prove that by adopting the technical scheme of the invention, when the fluorine leakage of the air conditioner is 10-50%, the air conditioner can effectively warn and prompt a user to carry out after-sale treatment, so that the air conditioner is prevented from operating in a severe environment for a long time, and the service life reliability of the air conditioner is improved.
According to the embodiment of the invention, the terminal corresponding to the method for detecting the refrigerant leakage of the air conditioner is also provided. The terminal can include: a processor for executing a plurality of instructions; a memory to store a plurality of instructions; the instructions are stored in the memory, and are loaded by the processor and execute the method for detecting the refrigerant leakage of the air conditioner.
Since the processing and functions implemented by the terminal of this embodiment substantially correspond to the embodiments, principles, and examples of the methods shown in fig. 1 to fig. 4, details are not described in the description of this embodiment, and reference may be made to the related descriptions in the foregoing embodiments, which are not described herein again.
Through a large number of tests, the technical scheme provided by the invention is adopted, and the protection is more timely by correcting the related protection parameters, so that the operation reliability and the user experience of the air conditioner are improved.
According to the embodiment of the invention, the air conditioner corresponding to the refrigerant leakage detection device or the storage device of the air conditioner is also provided. The air conditioner may include: the above-mentioned refrigerant leakage detection device for an air conditioner, or the above-mentioned storage device.
In an optional example, when less than 50% of refrigerant leaks from the air conditioner, the exhaust temperature of the compressor is increased, but because the refrigerant is too little, the pipe temperature of the outdoor unit heat exchanger during refrigeration or the pipe temperature of the indoor unit heat exchanger during heating is reduced, and most of the conventional protection logic takes the pipe temperature, the environment temperature and the exhaust temperature as judgment conditions, the protection logic is misjudged or fails when the refrigerant leaks.
The tube temperature refers to the tube temperature of an evaporator (e.g., an internal heat exchanger) and a condenser (e.g., an external heat exchanger), and is divided into the tube temperature of the internal evaporator and the tube temperature of the external heat exchanger, which are collectively referred to as the tube temperature because of different logic use conditions. The tube temperature in this embodiment may be understood to refer to the tube temperature of the outdoor unit heat exchanger during cooling, and the tube temperature of the indoor unit heat exchanger during heating.
In an alternative example, referring to the example shown in fig. 6, whether refrigerant leakage occurs may be identified by the following scheme:
step 1, after starting up and starting up for t time (the value range is 5-15min), obtaining the current running state parameters of a prototype, such as:
inside ambient temperature TInner ringOutside ambient temperature TOuter ringAnd the method is used for confirming the operation condition of the prototype, and obtaining the preset △ T by table lookup0As a reference temperature difference.
Judging whether the temperature difference value of the reference is needed for the leakage of the cooling medium, wherein the temperature difference value is related to the inner ring, the outer ring and the refrigeration and heating mode, so that the range of the inner ring and the outer ring of the prototype is needed, and the reference △ T can be obtained by looking up the table0The value is obtained.
Obtaining compressor exhaust temperature value T under refrigeration modeRow boardTube temperature T of external heat exchangerOuter tubeObtaining the exhaust temperature value T of the compressor in the heating modeRow boardTube temperature T of indoor heat exchangerInner pipeAnd calculating the condensation temperature difference value.
Step 2, calculating a condensation temperature difference value △ T, wherein △ T is T when refrigeratingRow board-TOuter tube△ T ═ T in heatingRow board-TInner pipe。
Step 3, through the preset △ T0By comparison, the refrigerant leakage ratio X ═ a (△ T- △ T) can be estimated0)]％，10％≤X≤50％。
Wherein a is a scale factor which needs to be fitted by experiment and is related to the refrigerant filling amount, △ T0The statistical data obtained by experiments, different from the changes of the inner ring and the outer ring, can be preset in the program by a table look-up method.
The following table was used in the cooling mode:
the following table was used in heating mode:
for example, fig. 7 shows △ T ═ T obtained by a heating mode experiment under a certain conditionRow board-TInner pipeGraph with refrigerant leakage, thereby △ T under the working condition0The value is 50 ℃, the scaling factor a is 1.1, when the refrigerant leaks 300g (18%), △ T is calculated to be 66 ℃, and the formula X is ═ a (△ T- △ T)0)]% is calculated to obtain X of 17.6%, when refrigerant leaks to 450g (28%), △ T is calculated to obtain 76 deg.C, X of 28.6% is calculated, and the formula is basically fitted to reality.
And 4, when the ratio X is greater than 10%, prompting a user to leak the refrigerant, wherein the prompting mode can display codes through a panel, and the modes of buzzing alarm, lightening of a warning lamp, intelligent APP and the like are given out, but normal use of the user is not influenced.
And 5, correcting protection logics related to the temperature of the heating inner pipe and the temperature of the refrigerating outer pipe, such as logics for preventing high temperature, overhigh temperature of the inner pipe, overload and the like, and enabling the protection logics to normally run by correcting parameter values of the temperature of the inner pipe and the temperature of the outer pipe. In the case of fluorine leakage, the tube temperature values in the protection logic were corrected as follows based on the above calculated X values (data are for reference only, confirmed specifically from experimental data of different prototypes).
| Correction value | |
| 10％＜X | A0(reference value 0) |
| 10％≤X＜20％ | A1(reference value +1) |
| 20％≤X＜30％ | A2(reference value +2) |
| 30％≤X＜40％ | A3(reference value +4) |
| 40％≤X＜50％ | A4(reference value +6) |
(Note: +1 indicates that if the actual tube temperature detection value is A, A is made to be A +1 as the detection value)
In fact, in the logic related to the pipe temperature, the detected value is corrected by a certain value and then used as a detection value to carry out logic judgment, the logic meets the rule when no refrigerant leaks, and timely protection is well carried out, for example, if the high-temperature-resistant logic requires that the air conditioner needs to be protected when the inner pipe is higher than 60 ℃, if the refrigerant does not leak at the moment, the exhaust temperature can be 120 ℃, but because the refrigerant leaks, if the inner pipe is protected again at 60 ℃, the exhaust possibly exceeds 130 ℃, the reliability of the air conditioner is influenced, therefore, the correction is needed, if the correction is +5 ℃, the protection can be carried out when 55 ℃ is actually detected, and the reliability is improved.
In an alternative embodiment, the fluorine leak determination may instead change the temperature difference value to determine a compressor current to normal operation difference value.
For example: the scheme of the embodiment can be used on a fixed frequency machine. For a fixed frequency machine, the current may be detected by an ac transformer. For a fixed frequency machine and a frequency converter, if the current is excluded, obtaining the difference; the difference lies in the difference of the correlation, the frequency converter is provided with an electronic expansion valve; the fixed frequency machine has no parameter, and the structure and the control are simpler and more reliable.
Since the processing and functions of the air conditioner of this embodiment are basically corresponding to the embodiments, principles and examples of the apparatus or the storage device shown in fig. 5, reference may be made to the related descriptions in the foregoing embodiments without specific details in the description of this embodiment, and no further description is given here.
Through a large number of tests, the technical scheme of the invention has the advantages of good use convenience and good humanization by prompting under the condition of not influencing the normal use of the user.
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 (33)
1. A method for detecting a refrigerant leakage of an air conditioner is characterized by comprising the following steps:
acquiring current operation state parameters of the air conditioner;
determining a reference temperature difference of the air conditioner according to the current operating state parameter, and determining a heat exchange temperature difference between a compressor and a heat exchanger of the air conditioner;
determining the proportion of the refrigerant leakage of the air conditioner according to the difference value between the heat exchange temperature difference and the reference temperature difference and a set calculation coefficient; when the air conditioner leaks refrigerant, correcting the pipe temperature in the corresponding protection logic of the heating inner pipe temperature or the refrigerating outer pipe temperature of the air conditioner;
wherein the current operating state parameters include: compressor discharge temperature and heat exchanger tube temperature; the heat exchanger tube temperature includes: the temperature of the outdoor heat exchanger tube in a cooling mode or the temperature of the indoor heat exchanger tube in a heating mode; determining a heat exchange temperature difference between a compressor and a heat exchanger of the air conditioner, comprising:
determining a difference between the compressor discharge temperature and the outdoor heat exchanger tube temperature as the heat exchange temperature difference in the cooling mode; or,
and determining the difference value between the discharge temperature of the compressor and the pipe temperature of the indoor heat exchanger as the heat exchange temperature difference in the heating mode.
2. The method of claim 1, wherein obtaining the current operating state parameters of the air conditioner comprises:
determining whether the running time of the air conditioner after starting up reaches a first set time;
and receiving the current running state parameters collected by a sensing device after the running time reaches the first set time.
3. The method according to claim 1 or 2, wherein,
the current operating state parameter further includes: outdoor ambient temperature and indoor ambient temperature;
determining a reference temperature difference of the air conditioner, including:
and determining the reference temperature difference corresponding to the current indoor environment temperature and the current outdoor environment temperature according to the corresponding relation among the set indoor environment temperature, the set outdoor environment temperature and the set reference temperature difference.
4. The method of claim 1 or 2, further comprising:
determining whether the proportion of the leaked refrigerant is larger than or equal to the lower limit of a set range;
and when the refrigerant leakage ratio is greater than or equal to the lower limit of the set range, prompting.
5. The method of claim 3, further comprising:
determining whether the proportion of the leaked refrigerant is larger than or equal to the lower limit of a set range;
and when the refrigerant leakage ratio is greater than or equal to the lower limit of the set range, prompting.
6. The method of claim 4, wherein the initiating the prompt comprises:
prompting in at least one of the following forms through a panel of the air conditioner and/or a set client side:
displaying the refrigerant proportion and/or the code matched with the refrigerant leakage proportion;
emitting at least one of an audible and visual prompt and a voice prompt; wherein the audible and visual prompt comprises: alarming in a buzzing mode;
and lightening a warning lamp.
7. The method of claim 5, wherein the initiating the prompt comprises:
prompting in at least one of the following forms through a panel of the air conditioner and/or a set client side:
displaying the refrigerant proportion and/or the code matched with the refrigerant leakage proportion;
emitting at least one of an audible and visual prompt and a voice prompt; wherein the audible and visual prompt comprises: alarming in a buzzing mode;
and lightening a warning lamp.
8. The method of claim 4, further comprising:
determining whether the proportion of the leaked refrigerant is smaller than the upper limit of the set range;
when the proportion of the refrigerant leakage is smaller than the upper limit of the set range, determining a membership interval of the proportion of the refrigerant leakage between the lower limit of the set range and the upper limit of the set range;
determining a correction value corresponding to the membership interval according to a second corresponding relation between a set refrigerant leakage interval and a set correction value;
and correcting the protection logic related to the heat exchanger tube temperature according to the correction value so as to ensure that the protection logic operates normally.
9. The method of claim 5 or 6, further comprising:
determining whether the proportion of the leaked refrigerant is smaller than the upper limit of the set range;
when the proportion of the refrigerant leakage is smaller than the upper limit of the set range, determining a membership interval of the proportion of the refrigerant leakage between the lower limit of the set range and the upper limit of the set range;
determining a correction value corresponding to the membership interval according to a second corresponding relation between a set refrigerant leakage interval and a set correction value;
and correcting the protection logic related to the heat exchanger tube temperature according to the correction value so as to ensure that the protection logic operates normally.
10. The method of claim 7, further comprising:
determining whether the proportion of the leaked refrigerant is smaller than the upper limit of the set range;
when the proportion of the refrigerant leakage is smaller than the upper limit of the set range, determining a membership interval of the proportion of the refrigerant leakage between the lower limit of the set range and the upper limit of the set range;
determining a correction value corresponding to the membership interval according to a second corresponding relation between a set refrigerant leakage interval and a set correction value;
and correcting the protection logic related to the heat exchanger tube temperature according to the correction value so as to ensure that the protection logic operates normally.
11. The method of any one of claims 1, 2, 5, 6, 8, 10, further comprising:
storing a first corresponding relationship between a set indoor ambient temperature, a set outdoor ambient temperature and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode;
and/or the presence of a gas in the gas,
and storing a second corresponding relation between the set refrigerant leakage interval and the set correction value.
12. The method of claim 3, further comprising:
storing a first corresponding relationship between a set indoor ambient temperature, a set outdoor ambient temperature and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode;
and/or the presence of a gas in the gas,
and storing a second corresponding relation between the set refrigerant leakage interval and the set correction value.
13. The method of claim 4, further comprising:
storing a first corresponding relationship between a set indoor ambient temperature, a set outdoor ambient temperature and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode;
and/or the presence of a gas in the gas,
and storing a second corresponding relation between the set refrigerant leakage interval and the set correction value.
14. The method of claim 7, further comprising:
storing a first corresponding relationship between a set indoor ambient temperature, a set outdoor ambient temperature and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode;
and/or the presence of a gas in the gas,
and storing a second corresponding relation between the set refrigerant leakage interval and the set correction value.
15. The method of claim 9, further comprising:
storing a first corresponding relationship between a set indoor ambient temperature, a set outdoor ambient temperature and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode;
and/or the presence of a gas in the gas,
and storing a second corresponding relation between the set refrigerant leakage interval and the set correction value.
16. A refrigerant leakage detection device of an air conditioner is characterized by comprising:
the acquisition unit is used for acquiring the current running state parameter of the air conditioner;
the determining unit is used for determining the reference temperature difference of the air conditioner according to the current running state parameter and determining the heat exchange temperature difference between a compressor and a heat exchanger of the air conditioner;
the determining unit is further used for determining the proportion of the refrigerant leakage of the air conditioner according to the difference value between the heat exchange temperature difference and the reference temperature difference and a set calculation coefficient; when the air conditioner leaks refrigerant, correcting the pipe temperature in the corresponding protection logic of the heating inner pipe temperature or the refrigerating outer pipe temperature of the air conditioner;
wherein the current operating state parameters include: compressor discharge temperature and heat exchanger tube temperature; the heat exchanger tube temperature includes: the temperature of the outdoor heat exchanger tube in a cooling mode or the temperature of the indoor heat exchanger tube in a heating mode; the determining unit determines the heat exchange temperature difference between the compressor and the heat exchanger of the air conditioner, and specifically comprises the following steps:
determining a difference between the compressor discharge temperature and the outdoor heat exchanger tube temperature as the heat exchange temperature difference in the cooling mode; or,
and determining the difference value between the discharge temperature of the compressor and the pipe temperature of the indoor heat exchanger as the heat exchange temperature difference in the heating mode.
17. The apparatus of claim 16, wherein obtaining the current operating state parameter of the air conditioner comprises:
determining whether the running time of the air conditioner after starting up reaches a first set time;
and receiving the current running state parameters collected by a sensing device after the running time reaches the first set time.
18. The apparatus of claim 16 or 17, wherein,
the current operating state parameters include: outdoor ambient temperature and indoor ambient temperature;
the determining unit determines the reference temperature difference of the air conditioner, and specifically includes:
and determining the reference temperature difference corresponding to the current indoor environment temperature and the current outdoor environment temperature according to the corresponding relation among the set indoor environment temperature, the set outdoor environment temperature and the set reference temperature difference.
19. The apparatus of claim 16 or 17, further comprising:
the determining unit is further used for determining whether the proportion of the leaked refrigerant is larger than or equal to the lower limit of a set range;
and the prompting unit is used for initiating a prompt when the refrigerant leakage ratio is greater than or equal to the lower limit of the set range.
20. The apparatus of claim 18, further comprising:
the determining unit is further used for determining whether the proportion of the leaked refrigerant is larger than or equal to the lower limit of a set range;
and the prompting unit is used for initiating a prompt when the refrigerant leakage ratio is greater than or equal to the lower limit of the set range.
21. The apparatus according to claim 19, wherein the prompting unit initiates the prompting, specifically including:
prompting in at least one of the following forms through a panel of the air conditioner and/or a set client side:
displaying the refrigerant proportion and/or the code matched with the refrigerant leakage proportion;
emitting at least one of an audible and visual prompt and a voice prompt; wherein the audible and visual prompt comprises: alarming in a buzzing mode;
and lightening a warning lamp.
22. The apparatus according to claim 20, wherein the prompting unit initiates the prompting, specifically including:
prompting in at least one of the following forms through a panel of the air conditioner and/or a set client side:
displaying the refrigerant proportion and/or the code matched with the refrigerant leakage proportion;
emitting at least one of an audible and visual prompt and a voice prompt; wherein the audible and visual prompt comprises: alarming in a buzzing mode;
and lightening a warning lamp.
23. The apparatus of claim 19, further comprising:
the determining unit is further used for determining whether the proportion of the leaked refrigerant is smaller than the upper limit of the set range;
the determining unit is further configured to determine a membership interval of the refrigerant leakage ratio between the lower limit of the setting range and the upper limit of the setting range when the refrigerant leakage ratio is smaller than the upper limit of the setting range;
the determining unit is further used for determining the correction value corresponding to the membership interval according to a second corresponding relation between the set refrigerant leakage interval and the set correction value;
and the determining unit is also used for correcting the protection logic related to the heat exchanger tube temperature according to the correction value so as to ensure that the protection logic operates normally.
24. The apparatus of claim 20 or 21, further comprising:
the determining unit is further used for determining whether the proportion of the leaked refrigerant is smaller than the upper limit of the set range;
the determining unit is further configured to determine a membership interval of the refrigerant leakage ratio between the lower limit of the setting range and the upper limit of the setting range when the refrigerant leakage ratio is smaller than the upper limit of the setting range;
the determining unit is further used for determining the correction value corresponding to the membership interval according to a second corresponding relation between the set refrigerant leakage interval and the set correction value;
and the determining unit is also used for correcting the protection logic related to the heat exchanger tube temperature according to the correction value so as to ensure that the protection logic operates normally.
25. The apparatus of claim 22, further comprising:
the determining unit is further used for determining whether the proportion of the leaked refrigerant is smaller than the upper limit of the set range;
the determining unit is further configured to determine a membership interval of the refrigerant leakage ratio between the lower limit of the setting range and the upper limit of the setting range when the refrigerant leakage ratio is smaller than the upper limit of the setting range;
the determining unit is further used for determining the correction value corresponding to the membership interval according to a second corresponding relation between the set refrigerant leakage interval and the set correction value;
and the determining unit is also used for correcting the protection logic related to the heat exchanger tube temperature according to the correction value so as to ensure that the protection logic operates normally.
26. The apparatus of any one of claims 16, 17, 20, 21, 23, 25, further comprising:
a storage unit for storing a first correspondence between a set indoor ambient temperature, a set outdoor ambient temperature, and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode;
and/or the presence of a gas in the gas,
the storage unit is also used for storing a second corresponding relation between the set leakage refrigerant interval and the set correction value.
27. The apparatus of claim 18, further comprising:
a storage unit for storing a first correspondence between a set indoor ambient temperature, a set outdoor ambient temperature, and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode;
and/or the presence of a gas in the gas,
the storage unit is also used for storing a second corresponding relation between the set leakage refrigerant interval and the set correction value.
28. The apparatus of claim 19, further comprising:
a storage unit for storing a first correspondence between a set indoor ambient temperature, a set outdoor ambient temperature, and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode;
and/or the presence of a gas in the gas,
the storage unit is also used for storing a second corresponding relation between the set leakage refrigerant interval and the set correction value.
29. The apparatus of claim 22, further comprising:
a storage unit for storing a first correspondence between a set indoor ambient temperature, a set outdoor ambient temperature, and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode;
and/or the presence of a gas in the gas,
the storage unit is also used for storing a second corresponding relation between the set leakage refrigerant interval and the set correction value.
30. The apparatus of claim 24, further comprising:
a storage unit for storing a first correspondence between a set indoor ambient temperature, a set outdoor ambient temperature, and a set reference temperature difference; wherein the first corresponding relationship comprises: a refrigeration correspondence in a refrigeration mode, or a heating correspondence in a heating mode;
and/or the presence of a gas in the gas,
the storage unit is also used for storing a second corresponding relation between the set leakage refrigerant interval and the set correction value.
31. A storage device having a plurality of instructions stored therein; the instructions are used for loading and executing the method for detecting the refrigerant leakage of the air conditioner according to any one of claims 1 to 15 by the processor.
32. A terminal, comprising:
a processor for executing a plurality of instructions;
a memory to store a plurality of instructions;
wherein the instructions are stored in the memory, and loaded by the processor and executed by the processor to perform the method for detecting a refrigerant leakage of an air conditioner according to any one of claims 1 to 15.
33. An air conditioner, comprising: the refrigerant leakage detection device of an air conditioner according to any one of claims 16 to 30, or the storage apparatus according to claim 31.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN109028456B (en) * | 2018-08-30 | 2021-04-30 | 海信（山东）空调有限公司 | Refrigerant leakage detection method and device |
| CN109556226B (en) * | 2018-11-01 | 2020-01-03 | 珠海格力电器股份有限公司 | Method, device and unit for determining content of refrigerant |
| CN111397135A (en) * | 2020-04-02 | 2020-07-10 | 青岛海尔空调电子有限公司 | Fluorine-lack detection control method of air conditioner and air conditioner |
| CN115899947B (en) * | 2022-06-21 | 2025-02-11 | 珠海格力电器股份有限公司 | A method, device and storage medium for detecting refrigerant content of air conditioner |
| CN115540200A (en) * | 2022-08-26 | 2022-12-30 | 青岛海尔空调器有限总公司 | Method and device for detecting refrigerant abnormality, air conditioner, storage medium |
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