CN117006596A - Refrigerant leakage detection method, control device and storage medium in air conditioning system - Google Patents
Refrigerant leakage detection method, control device and storage medium in air conditioning system Download PDFInfo
- Publication number
- CN117006596A CN117006596A CN202310947643.6A CN202310947643A CN117006596A CN 117006596 A CN117006596 A CN 117006596A CN 202310947643 A CN202310947643 A CN 202310947643A CN 117006596 A CN117006596 A CN 117006596A
- Authority
- CN
- China
- Prior art keywords
- temperature
- air conditioning
- conditioning system
- refrigerant
- reduced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004378 air conditioning Methods 0.000 title claims abstract description 159
- 239000003507 refrigerant Substances 0.000 title claims abstract description 105
- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 230000000694 effects Effects 0.000 claims abstract description 65
- 238000000034 method Methods 0.000 claims abstract description 46
- 238000001816 cooling Methods 0.000 claims description 37
- 238000004590 computer program Methods 0.000 claims description 16
- 238000005057 refrigeration Methods 0.000 claims description 8
- 230000009467 reduction Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000004092 self-diagnosis Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a refrigerant leakage detection method, a control device and a storage medium in an air conditioning system. The method comprises the following steps: acquiring a first system output parameter; judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first system output parameter; if the refrigerating effect of the air conditioning system is reduced, acquiring a second system output parameter; and judging whether the refrigerant in the air conditioning system leaks or not based on the output parameters of the second system. The technology accurately judges whether the refrigerating effect of the air conditioning system is reduced by acquiring and analyzing the output parameters of the first system. And further obtaining output parameters of the second system to judge refrigerant leakage. The method can effectively identify the problem of refrigerant leakage at an early stage, avoid the performance reduction and equipment damage of the air conditioner caused by refrigerant leakage, and greatly improve the service life and performance stability of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a refrigerant leakage detection method, a control device and a storage medium in an air conditioning system.
Background
With the use of the air conditioner, the refrigerant may leak, which may seriously affect the refrigerating effect, and cause the efficiency of the air conditioner to be reduced or even be ineffective. However, refrigerant leakage typically does not directly result in observable physical changes.
In the prior art, it is often difficult for an air conditioner user to determine whether a specific cause of the reduction in the cooling effect is refrigerant leakage or other problems such as power supply problems, air filter clogging, aging of the cooling system, and the like.
Accordingly, there is a need in the art for a new refrigerant leak detection scheme to address the above-described problems.
Disclosure of Invention
The present invention is proposed to overcome the above-mentioned drawbacks, and to solve or at least partially solve the problem in the prior art that the refrigerant leakage is not easy to detect and find.
In a first aspect, the present invention provides a method for detecting leakage of a refrigerant in an air conditioning system, the method comprising: acquiring a first system output parameter; judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first system output parameter; if the refrigerating effect of the air conditioning system is reduced, acquiring a second system output parameter; and judging whether the refrigerant in the air conditioning system leaks or not based on the output parameters of the second system.
Alternatively or additionally to the above, in a method according to an embodiment of the invention, the first system output parameters comprise: first coil temperature and initial coil temperature, "acquire first system output parameters," including: acquiring an initial coil temperature and a first temperature threshold; when the air conditioning system operates in a refrigeration mode, acquiring a first coil temperature of an indoor evaporator in the air conditioning system; judging whether the refrigerating effect of the air conditioning system is reduced based on the first system output parameter comprises the following steps: and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first coil temperature, the initial coil temperature and the first temperature threshold temperature.
Alternatively or additionally to the above, in the method according to an embodiment of the present invention, "determining whether the cooling effect of the air conditioning system is reduced based on the first coil temperature, the initial coil temperature, and the first temperature threshold temperature" includes: obtaining a first difference value of the first coil temperature and the first temperature threshold value based on the first coil temperature and the first temperature threshold value; and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first difference value and a preset first temperature threshold value.
Alternatively or additionally to the above, in a method according to an embodiment of the invention, wherein the second system output parameters comprise: the compressor exhaust temperature and/or air conditioning system power, judging whether the refrigerant in the air conditioning system leaks based on the second system output parameter, includes: and judging whether the refrigerant in the air conditioning system leaks or not based on the exhaust temperature of the compressor and/or the power of the air conditioning system.
Alternatively or additionally, in the method according to an embodiment of the present invention, "determining whether the refrigerant in the air conditioning system leaks based on the compressor discharge temperature and/or the air conditioning system power" includes: acquiring a preset first exhaust temperature and a second temperature threshold, wherein the first exhaust temperature is determined based on the current indoor temperature and the current outdoor temperature; obtaining a second difference of the compressor discharge temperature and the first discharge temperature based on the two; judging whether the refrigerant in the air conditioning system leaks or not based on a second difference value and a second temperature threshold value; and/or acquiring preset air conditioner preset power and a third threshold value, wherein the air conditioner preset power is determined based on the current indoor temperature and the current outdoor temperature; obtaining a third difference value of the preset power and a third threshold value of the air conditioner based on the preset power of the air conditioner; and judging whether the refrigerant in the air conditioning system leaks or not based on the third difference value and a third threshold value.
Alternatively or additionally to the above, in a method according to an embodiment of the invention, the first system output parameters further comprise: the present indoor temperature, whether the refrigerating effect of the air conditioning system is reduced based on the first coil temperature, the initial coil temperature and the first temperature threshold temperature, includes: and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first coil temperature, the initial coil temperature, the current indoor temperature and the first temperature threshold temperature.
Alternatively or additionally to the above, in the method according to an embodiment of the present invention, "determining whether the cooling effect of the air conditioning system is reduced based on the first coil temperature, the initial coil temperature, the current indoor temperature, and the first temperature threshold temperature" includes: acquiring a fourth temperature threshold and a fifth threshold; obtaining a fourth difference value of the first coil temperature and the first temperature threshold value based on the first coil temperature and the first temperature threshold value; comparing the fourth difference value with a fourth temperature threshold value to obtain a first comparison result; comparing the current indoor temperature with a fifth threshold value to obtain a second comparison result; comparing the first difference value with a preset first temperature threshold value to obtain a third comparison result; and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first comparison result, the second comparison result and the third comparison result.
In a second aspect, a control device is provided, where the control device includes a processor and a storage device, where the storage device is adapted to store a plurality of computer programs, where the computer programs are adapted to be loaded and executed by the processor to perform the method for detecting refrigerant leakage in an air conditioning system according to any one of the technical solutions of the method for detecting refrigerant leakage in an air conditioning system.
In a third aspect, a computer readable storage medium is provided, where a plurality of computer programs are stored, where the computer programs are adapted to be loaded and run by a processor to perform the refrigerant leakage detection method in an air conditioning system according to any one of the technical solutions of the refrigerant leakage detection method in an air conditioning system described above.
In a fourth aspect, an air conditioning system is provided, where the air conditioning system includes a control device, where the control device is operative to perform the refrigerant leakage detection method in the air conditioning system according to any one of the technical solutions of the refrigerant leakage detection method in the air conditioning system.
One or more of the above technical solutions of the present invention at least has one or more of the following
The beneficial effects are that:
in the technical scheme of the invention, whether the refrigeration effect of the air conditioning system is reduced is accurately judged by acquiring and analyzing the output parameters of the first system. When the system detects that the refrigerating effect is reduced, further acquiring output parameters of the second system, and judging the leakage of the refrigerant according to the parameters. The method can effectively identify the problem of refrigerant leakage at an early stage, avoid the performance reduction and equipment damage of the air conditioner caused by refrigerant leakage, and greatly improve the service life and performance stability of the air conditioner. According to the technical scheme, the refrigerant leakage detection process is more accurate and convenient, the self-diagnosis capacity of the air conditioning system is improved, and the maintenance cost is reduced.
Drawings
The present disclosure will become more readily understood with reference to the accompanying drawings. As will be readily appreciated by those skilled in the art: the drawings are for illustrative purposes only and are not intended to limit the scope of the present invention. Moreover, like numerals in the figures are used to designate like parts, wherein:
FIG. 1 is a flow chart illustrating the main steps of a refrigerant leakage detecting method in an air conditioning system according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating minor steps of a method for detecting refrigerant leakage in an air conditioning system according to an embodiment of the present invention;
fig. 3 is a flow chart illustrating minor steps of a refrigerant leakage detecting method in an air conditioning system according to an embodiment of the present invention.
Detailed Description
Some embodiments of the invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, a "module," "processor" may include hardware, software, or a combination of both. A module may comprise hardware circuitry, various suitable sensors, communication ports, memory, or software components, such as computer programs, or a combination of software and hardware. The processor may be a central processor, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and/or signal processing functions. The processor may be implemented in software, hardware, or a combination of both. Non-transitory computer readable storage media include any suitable medium that can store a computer program, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, and the like. The term "a and/or B" means all possible combinations of a and B, such as a alone, B alone or a and B. The term "at least one A or B" or "at least one of A and B" has a meaning similar to "A and/or B" and may include A alone, B alone or A and B. The singular forms "a", "an" and "the" include plural referents.
Example 1:
referring to fig. 1, fig. 1 is a schematic flow chart of main steps of a refrigerant leakage detecting method in an air conditioning system according to an embodiment of the invention. As shown in fig. 1, the method for detecting refrigerant leakage in an air conditioning system according to an embodiment of the present invention mainly includes the following steps S10 to S40.
Step S10: and obtaining the output parameters of the first system.
In this embodiment, the system defines the collected relevant data as the first system output parameter. These parameters include the coil temperature (i.e., the first coil temperature) and the initial coil temperature of the indoor evaporator. Variations in these parameters may provide information on the cooling capacity status of the air conditioning system. For example, the coil temperature may reflect the efficiency of the cooling process, as it reflects the state of refrigerant flow in the system.
In one embodiment, a specific case when the refrigerating capacities of the air conditioners are different will be described, which is specifically as follows: in an ideal situation, the air conditioning system should be operated with a constant temperature difference, indicating a stable cooling effect. However, if the refrigerant leaks, the cooling capacity of the air conditioner is lowered, which results in a significant change in the temperature of the first coil.
In this embodiment, the first system output parameter is obtained through steps S101 to S102, as shown in fig. 2, specifically as follows.
Wherein the first system output parameters include: a first coil temperature and an initial coil temperature.
Step S101: an initial coil temperature and a first temperature threshold are obtained.
In this embodiment, the coil temperature obtained is the initial coil temperature when the air conditioning system compressor is not started or is just beginning to run.
In one embodiment, the first temperature threshold is set based on the operating environment, model, and other relevant factors of the air conditioner. This threshold is in fact a preset upper temperature difference, i.e. the first difference, that is derived from the initial coil temperature and the first coil temperature after the air conditioning system has been operated in the cooling mode for a certain period of time. If the actual first difference exceeds the preset first temperature threshold, it is determined that the cooling effect of the air conditioning system is reduced.
Step S102: when the air conditioning system is operated in a cooling mode, a first coil temperature of an indoor evaporator in the air conditioning system is obtained.
In this embodiment, the first coil temperature refers to the temperature of the coil after the air conditioning system has been operated for a period of time in the initial cooling mode.
In one embodiment, in the cooling mode, the refrigerant of the air conditioning system evaporates in the coils of the indoor evaporator, absorbing the heat of the environment, so that the temperature of the coils decreases, and the temperature of the air drops after passing through these cooled coils. The coil temperature is an important parameter reflecting the refrigerating effect of the air conditioner, and in general, the lower the coil temperature is, the better the refrigerating effect of the air conditioner is.
In the present embodiment, the purpose of acquiring the first coil temperature is to be able to accurately determine whether the cooling effect of the air conditioner is reduced later. If the first coil temperature is significantly too high after the air conditioner is operated for a certain period of time, it is indicated that the cooling effect has been lowered. The degradation of the cooling effect may be caused by various reasons, such as leakage of refrigerant, insufficient cleaning of the air conditioner, etc. Thus, the first coil temperature is an important basis for subsequent diagnostics.
In this embodiment, in order to obtain an accurate first coil temperature, after the air conditioning system is operated to some extent, a temperature sensor with sufficient accuracy is used to measure the coil temperature. To obtain more accurate results, temperature data may be acquired once at different points in time, and then an average of these data taken as the first coil temperature.
For example: during a typical refrigeration cycle, coil temperatures are taken once at 10, 11, and 12 minutes after the system begins operation. The obtained temperature values are T1, T2 and T3 respectively. Then, an average value (t1+t2+t3)/3 of these three temperature values is taken as the first coil temperature. This temperature value will be an important parameter for the subsequent evaluation of whether the cooling effect of the air conditioning system is reduced. In this way, even if the environmental conditions fluctuate, a more accurate first coil temperature can be obtained, thereby facilitating accurate assessment of the cooling effect of the air conditioning system.
To summarize, the step S10 is set up to obtain the reference data of the preliminary working state of the air conditioning system, and provides a basis for determining whether the refrigerating effect of the air conditioner is reduced and whether the refrigerant leaks in the subsequent steps.
Step S20: and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first system output parameter.
In this embodiment, it is determined whether the cooling effect of the air conditioning system is reduced according to the data of step S10.
In one embodiment, a specific determination is made in step S201. The method comprises the following steps:
step S201: and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first coil temperature, the initial coil temperature and the first temperature threshold temperature.
In one embodiment, the temperature difference value of the initial coil pipe temperature and the first coil pipe temperature in the running process is compared with a first temperature threshold value to judge whether the refrigerating effect of the air conditioning system is reduced or not, so that an important reference is provided for subsequent fault detection.
In the present embodiment, the corresponding determination is performed in steps S201-1 to S201-2.
Step S201-1: based on the first coil temperature and the first temperature threshold, a first difference is obtained.
Step S201-2: and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first difference value and a preset first temperature threshold value.
In this embodiment, the magnitude of the first difference directly characterizes the degree of deviation between the current refrigeration state of the air conditioning system and the normal threshold. If the first difference is larger, it may suggest that the refrigeration effect of the air conditioning system has been reduced; if the first difference fluctuates within a certain range, the cooling effect is still in the normal range. In this embodiment, preferably, the first temperature threshold may be set by user to adjust.
Step S30: and if the refrigerating effect of the air conditioning system is reduced, acquiring a second system output parameter.
In this embodiment, the second system output parameters include: compressor discharge temperature. The compressor discharge temperature can represent the state of the refrigerant in the compressor, which is closely related to the amount of the refrigerant and the operation state of the air conditioning system. If the refrigerant leaks, the discharge temperature of the compressor increases significantly, because the lack of sufficient refrigerant results in a reduced density after compression of the compressor, and thus the discharge temperature increases.
In one embodiment, if the cooling effect of the air conditioning system is reduced, this may be due to leakage of the refrigerant. Thus, to further confirm this assumption, it is necessary to acquire the second system output parameters. In the embodiment, whether the possibility of refrigerant leakage exists is determined by acquiring and analyzing the output parameters of the second system, so that the positioning of the system problem is further clarified, and key information is provided for subsequent refrigerant leakage determination and processing.
Step S40: and judging whether the refrigerant in the air conditioning system leaks or not based on the output parameters of the second system.
In one embodiment, a change in temperature when the amount of refrigerant changes will be described in detail. The compressor in the air conditioning system is used for compressing low-temperature low-pressure refrigerant gas and converting the low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas. This process is performed according to the ideal gas state equation pv=nr×t, where P represents pressure, V represents volume, n represents mole number, R represents gas constant, and T represents absolute temperature). When the refrigerant quantity is reduced, namely n is reduced, and the power of the compressor is kept unchanged, the density of the compressed refrigerant is reduced, namely the number of molecules of the refrigerant in unit volume is reduced. Therefore, since the power of the compressor is not changed, the same volume of gas is compressed, and the number of molecules of the refrigerant is reduced, the temperature T of the compressor discharge gas is correspondingly increased.
Therefore, if the compressor discharge temperature is monitored to be high, it can be inferred that the refrigerant of the air conditioning system may leak. The implementation of this step requires that an exhaust temperature threshold be set in advance, and the system determines that the refrigerant may leak only when the measured exhaust temperature exceeds the preset threshold.
Here, the coil temperature reflects the cooling effect more, and cannot directly reflect the state of the refrigerant. Refrigerant leakage can affect the cooling effect of the air conditioner, resulting in a rise in coil temperature. However, the rise in coil temperature may also be caused by other causes, such as filter screen blockage, fan failure, excessive ambient temperature, etc. Therefore, it is not possible to accurately determine whether or not the refrigerant leaks by the coil temperature alone.
Therefore, step S40 is a key step in the refrigerant leakage detection method in the air conditioning system, and by monitoring the output parameter of the second system, that is, the exhaust temperature of the compressor, whether the refrigerant leaks or not can be effectively found and judged in real time, so that an important basis is provided for the subsequent refrigerant leakage treatment.
In the present embodiment, further judgment is performed in step S401, specifically as follows:
step S401: based on the exhaust temperature of the compressor, judging whether the refrigerant in the air conditioning system leaks.
In one embodiment, in the present embodiment, further judgment is performed by steps S401-1 to S401-3, specifically as follows:
step S401-1: and acquiring a preset first exhaust temperature and a preset second temperature threshold.
In the present embodiment, the first exhaust gas temperature is determined based on the current indoor temperature and the current outdoor temperature.
In one embodiment, the first discharge temperature is a preset value derived from the discharge temperature of the compressor of the air conditioning system that is normally operating under certain indoor and outdoor temperature conditions. The first exhaust temperature is helpful for comparing the exhaust temperature of the compressor in actual operation, so as to accurately judge whether the refrigerant leaks or not.
For example: when the indoor temperature is 25 ℃ and the outdoor temperature is 28 ℃, the set first exhaust temperature is Tn1. This means that under such ambient temperature conditions, if the air conditioning system is operating properly, the discharge temperature of its compressor should be equal to or near Tn1. When the indoor temperature is maintained at 25 deg.c and the outdoor temperature is raised to 32 deg.c, the first exhaust temperature is set to Tn2. In this case, the compressor requires more power to drive the refrigeration cycle due to the rise of the outdoor temperature, and thus the preset discharge temperature Tn2 may be correspondingly higher than Tn1.
Step S401-2: a second difference is obtained based on the compressor discharge temperature and the first discharge temperature.
In one embodiment, the second difference is a difference between the exhaust temperature of the compressor and the first exhaust temperature, and the magnitude of the second difference may directly reflect whether the actual working state of the compressor is consistent with the preset working state. If the second difference is smaller, the exhaust temperature of the compressor is similar to the preset first exhaust temperature, so that the working state of the air conditioning system can be considered to be normal, the refrigerating effect is good, and the flowing condition of the refrigerant is normal. However, if the second difference is large, and especially if the actual discharge temperature of the compressor is significantly higher than the preset discharge temperature, it is necessary to alert the air conditioning system to possible problems, such as leakage of refrigerant, etc.
In summary, the second difference value can be obtained to help monitor and evaluate the operation efficiency of the air conditioning system, and can be used as an important basis for judging whether the refrigerant in the air conditioning system leaks.
Step S401-3: and judging whether the refrigerant in the air conditioning system leaks or not based on the second difference value and the second temperature threshold value.
In one embodiment, the second temperature threshold is a preset reference value, and is generally determined by a combination of factors such as design parameters of the compressor, a refrigerant type, and an operation mode of the air conditioning system. This threshold represents the maximum range allowed by the second difference under normal operating conditions. If the second difference exceeds the threshold, it indicates that the actual discharge temperature of the compressor exceeds the normal range, which may be indicative of a refrigerant leak or the like.
In this embodiment, the air conditioning system has the capability of self-diagnosis through the steps, and can automatically monitor and alarm through the system at the early stage of the occurrence of problems such as refrigerant leakage, so as to timely find and solve the problems, thereby avoiding more serious consequences such as damage to the compressor, reduction in refrigeration efficiency and the like caused by refrigerant leakage.
Example 2:
most of the techniques in this embodiment are the same as those in embodiment 1, except for step S40 in this embodiment, the other techniques are the same as those in embodiment 1, and the details are not described here.
The second system output parameter includes air conditioning system power.
Step S402: based on the power of the air conditioning system, whether the refrigerant in the air conditioning system leaks or not is judged.
In this embodiment, the power of the air conditioning system refers to the electric energy consumed by the air conditioning system during the operation process, which is a dynamically changing parameter and is closely related to factors such as the operation mode, the operation state, and the performance of the internal components of the air conditioning system. Here, attention is paid to the power situation when the air conditioning system is operated in the cooling mode.
In the present embodiment, the judgment is further made in steps S402-1 to S402-3, as shown in fig. 3, specifically as follows:
step S402-1: and acquiring preset power of the preset air conditioner and a third threshold value.
In this embodiment, the air conditioner preset power is determined based on the current indoor temperature and the current outdoor temperature.
In one embodiment, the preset power of the air conditioner is set according to the power of the air conditioning system in a normal working state, and is generally determined comprehensively according to factors such as design parameters of the air conditioning system, refrigerant type, working mode and the like. If the actual air conditioning system power is below this preset air conditioning preset power, it is indicated that there may be some problems with the air conditioning system.
Specifically, in an air conditioning system, refrigerant leakage may result in air conditioning system power. This is because, when the refrigerant leaks, the amount of refrigerant in the air conditioning system is insufficient, so that the compressor cannot effectively compress the refrigerant, and the cooling effect of the air conditioning system is lowered. During operation of the air conditioning system, the reduction in cooling effect directly results in a reduction in power of the system. Therefore, when the actual power of the air conditioning system is lower than the preset power threshold, the problem of refrigerant leakage in the air conditioning system can be judged.
In this embodiment, the preset power of the air conditioner is similar to the first exhaust temperature in embodiment 1, and is determined by the current indoor temperature and the current outdoor temperature, which are not described herein.
Step S402-2: and obtaining a third difference value of the preset power and the third threshold value based on the air conditioner.
In one embodiment, the obtained actual running power is compared with the preset air conditioning power to obtain a difference value between the actual running power and the preset air conditioning power, namely a third difference value. This difference may be used to evaluate the degree of deviation between the actual operating efficiency of the air conditioning system and the preset operating efficiency, and in this embodiment, the greater this difference, the lower the actual operating efficiency of the air conditioning system, and the higher the risk of refrigerant leakage.
Step S402-3: and judging whether the refrigerant in the air conditioning system leaks or not based on the third difference value and the third threshold value.
In this embodiment, if the third difference exceeds the set third threshold, then the air conditioning system may be considered to have a possible refrigerant leakage problem.
Example 3:
most of the techniques in this embodiment are the same as those in embodiment 1, except for the steps S10 and S20 in this embodiment, the other techniques are the same as those in embodiment 1, and the details are not described here.
In this embodiment, the first system output parameters further include: current room temperature.
Step S10 obtains the first system output parameter through steps S101 to S103. That is, step S10 includes step S103 in addition to step S101 and step S102 in embodiment 1, and specifically includes the following steps:
step S103: the current indoor temperature is obtained.
Wherein step S20 includes step S202, specifically as follows:
step S202: and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first coil temperature, the initial coil temperature, the current indoor temperature and the first temperature threshold temperature.
In this embodiment, by comparing different temperature data with a preset temperature threshold, it is determined whether the refrigerating effect of the air conditioning system is reduced. These temperature data include the first coil temperature, the initial coil temperature, and the current indoor temperature.
In one embodiment, the correlation determination is performed in steps S202-1 to S202-6.
Step S202-1: a fourth temperature threshold and a fifth threshold are obtained.
In this embodiment, the two thresholds, the fourth temperature threshold and the fifth threshold, will be used in subsequent steps to make temperature comparisons and effect determinations.
Step S202-2: a fourth difference is derived based on the first coil temperature and the current indoor temperature.
In this embodiment, the fourth difference may reflect a temperature difference between the indoor environment and the coil.
In one embodiment, if the air conditioning system is operating properly, the temperature of the coil should be lower than the indoor temperature. Therefore, the fourth difference should be a positive number. If the fourth difference is negative or less than a certain positive value, it may indicate that the cooling effect of the air conditioner is reduced, and further detection and judgment are required.
Step S202-3: and comparing the fourth difference value with a fourth temperature threshold value to obtain a first comparison result.
In one embodiment, if the fourth difference is greater than or equal to the fourth temperature threshold, the first comparison result is positive, indicating that the cooling effect of the air conditioner is normal, or that the cooling effect of the air conditioner is not significantly reduced. If the fourth difference is less than the fourth temperature threshold, then the first comparison is negative, which may indicate that the cooling effect of the air conditioner is problematic and requires further detection and processing.
Step S202-4: and comparing the current indoor temperature with a fifth threshold value to obtain a second comparison result.
In one embodiment, the system compares the current indoor temperature read by the sensor to a preset fifth threshold. The current indoor temperature reflects the operating environment of the air conditioning system, and the fifth threshold is a preset value representing a minimum indoor temperature condition for the air conditioning compressor to operate at a relatively high load. In general, the compressor will only operate at higher loads when the indoor temperature reaches or exceeds this threshold, and the operating data at this time is of greater reference.
By comparing the current indoor temperature with the fifth threshold, a second comparison result may be obtained. If the current indoor temperature is greater than or equal to the fifth threshold value, the second comparison result is positive, which indicates that the air conditioning system is in a high-load running state, and the related data and indexes can more accurately reflect the actual working condition and performance condition of the air conditioning system. If the current indoor temperature is less than the fifth threshold, the second comparison result is negative, indicating that the load of the air conditioning system is low, and the data in this case may not accurately reflect the performance condition of the air conditioning system in the high load state.
Step S202-5: and comparing the first difference value with a preset first temperature threshold value to obtain a third comparison result.
In one embodiment, if the first difference is less than or equal to the first temperature threshold, the third comparison is negative or zero, indicating that the cooling effect of the air conditioning system is normal and that the coil temperature variation is within an acceptable range. If the first difference is greater than the first temperature threshold, the third comparison is positive, which may indicate a decrease in the cooling effect of the air conditioning system because the coil temperature varies beyond a preset acceptable range.
Step S202-6: and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first comparison result, the second comparison result and the third comparison result.
In one embodiment, by combining the three comparison results obtained previously, the system can make a more accurate determination of the cooling effect of the air conditioning system. Each comparison reflects the operating condition of the air conditioning system from a different perspective, e.g., a first comparison relates to the coil temperature and a set fourth temperature threshold, a second comparison relates to the current indoor temperature and a fifth threshold, and a third comparison relates to the coil temperature change and a preset first temperature threshold. The comprehensive analysis of the comparison results can comprehensively reflect the refrigerating effect of the air conditioning system from multiple angles.
In the present embodiment, if all the comparison results are within the normal range, it can be judged that the cooling effect is normal, and no further action is required. If all three comparisons are outside the normal range, it can be determined that there is a problem with the cooling effect.
Example 4:
most of the techniques in this embodiment are the same as those in embodiment 1 or 2, except for step S40 in this embodiment, the other techniques are the same as those in embodiment 1, and the details are not described here.
In this embodiment, a fourth comparison result is obtained based on the third difference value and the third threshold value. And obtaining a fifth comparison result based on the second difference value and the second temperature threshold value. And judging whether the refrigerant in the air conditioning system leaks or not based on the fourth comparison result and the fifth comparison result.
Specifically, similar to step S202-6, if both comparison results are required to be out of the normal range, then the refrigerant leakage can be determined. And will not be described in detail herein.
It will be appreciated by those skilled in the art that the present invention may implement all or part of the above-described methods in one embodiment, or may be implemented by a computer program for instructing the relevant hardware, and the computer program may be stored in a computer readable storage medium, where the computer program when executed by a processor implements the steps of the respective method embodiments described above. Wherein the computer program comprises a computer program, which may be in source code form, object code form, executable file or some intermediate form, etc. The computer readable storage medium may include: any entity or device, medium, usb disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier wave signals, telecommunications signals, software distribution media, and the like capable of carrying the computer program. It should be noted that the computer readable storage medium may include content that is subject to appropriate increases and decreases as required by jurisdictions and by jurisdictions in which such computer readable storage medium does not include electrical carrier signals and telecommunications signals.
Further, the invention also provides a control device. In an embodiment of the control device according to the present invention, the control device includes a processor and a storage device, the storage device may be configured to store a program for executing the refrigerant leakage detection method in the air conditioning system of the above-described method embodiment, and the processor may be configured to execute the program in the storage device, including, but not limited to, the program for executing the refrigerant leakage detection method in the air conditioning system of the above-described method embodiment. For convenience of explanation, only those portions of the embodiments of the present invention that are relevant to the embodiments of the present invention are shown, and specific technical details are not disclosed, please refer to the method portions of the embodiments of the present invention. The control device may be a control device formed of various electronic devices.
Further, the invention also provides a computer readable storage medium. In one embodiment of the computer readable storage medium according to the present invention, the computer readable storage medium may be configured to store a program for executing the refrigerant leakage detecting method in the air conditioning system of the above-described method embodiment, and the program may be loaded and executed by a processor to implement the refrigerant leakage detecting method in the air conditioning system. For convenience of explanation, only those portions of the embodiments of the present invention that are relevant to the embodiments of the present invention are shown, and specific technical details are not disclosed, please refer to the method portions of the embodiments of the present invention. The computer readable storage medium may be a storage device including various electronic devices, and optionally, the computer readable storage medium in the embodiments of the present invention is a non-transitory computer readable storage medium.
The invention further provides an air conditioning system, which comprises a control device, wherein the control device is operated to execute the refrigerant leakage detection method in the air conditioning system according to any one of the technical schemes of the refrigerant leakage detection method in the air conditioning system
Further, it should be understood that, since the respective modules are merely set to illustrate the functional units of the apparatus of the present invention, the physical devices corresponding to the modules may be the processor itself, or a part of software in the processor, a part of hardware, or a part of a combination of software and hardware. Accordingly, the number of individual modules in the figures is merely illustrative.
Those skilled in the art will appreciate that the various modules in the apparatus may be adaptively split or combined. Such splitting or combining of specific modules does not cause the technical solution to deviate from the principle of the present invention, and therefore, the technical solution after splitting or combining falls within the protection scope of the present invention.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.
Claims (10)
1. The refrigerant leakage detection method in the air conditioning system is characterized by comprising the following steps:
acquiring a first system output parameter;
judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first system output parameter;
if the refrigerating effect of the air conditioning system is reduced, acquiring a second system output parameter;
and judging whether the refrigerant in the air conditioning system leaks or not based on the output parameters of the second system.
2. The method for detecting leakage of refrigerant in an air conditioning system according to claim 1, wherein the first system output parameters include: first coil temperature and initial coil temperature, "acquire first system output parameters," including:
acquiring an initial coil temperature and a first temperature threshold;
when the air conditioning system operates in a refrigeration mode, acquiring a first coil temperature of an indoor evaporator in the air conditioning system;
judging whether the refrigerating effect of the air conditioning system is reduced based on the first system output parameter comprises the following steps:
and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first coil temperature, the initial coil temperature and the first temperature threshold temperature.
3. The method of claim 2, wherein determining whether the cooling effect of the air conditioning system is reduced based on the first coil temperature, the initial coil temperature, and a first temperature threshold temperature, comprises:
obtaining a first difference value of the first coil temperature and the first temperature threshold value based on the first coil temperature and the first temperature threshold value;
and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first difference value and a preset first temperature threshold value.
4. The method for detecting leakage of refrigerant in an air conditioning system according to claim 1, wherein the second system output parameters include: the compressor exhaust temperature and/or air conditioning system power, judging whether the refrigerant in the air conditioning system leaks based on the second system output parameter, includes:
and judging whether the refrigerant in the air conditioning system leaks or not based on the exhaust temperature of the compressor and/or the power of the air conditioning system.
5. The method according to claim 4, wherein determining whether the refrigerant in the air conditioning system leaks based on the compressor discharge temperature and/or the air conditioning system power, comprises:
acquiring a preset first exhaust temperature and a second temperature threshold, wherein the first exhaust temperature is determined based on the current indoor temperature and the current outdoor temperature;
obtaining a second difference of the compressor discharge temperature and the first discharge temperature based on the two;
judging whether the refrigerant in the air conditioning system leaks or not based on a second difference value and a second temperature threshold value;
and/or acquiring preset air conditioner preset power and a third threshold value, wherein the air conditioner preset power is determined based on the current indoor temperature and the current outdoor temperature;
obtaining a third difference value of the preset power and a third threshold value of the air conditioner based on the preset power of the air conditioner;
and judging whether the refrigerant in the air conditioning system leaks or not based on the third difference value and a third threshold value.
6. The method for detecting leakage of refrigerant in an air conditioning system according to claim 3, wherein the first system output parameters further comprise: the present indoor temperature, whether the refrigerating effect of the air conditioning system is reduced based on the first coil temperature, the initial coil temperature and the first temperature threshold temperature, includes:
and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first coil temperature, the initial coil temperature, the current indoor temperature and the first temperature threshold temperature.
7. The method of claim 6, wherein determining whether the cooling effect of the air conditioning system is reduced based on the first coil temperature, an initial coil temperature, a current indoor temperature, and a first temperature threshold temperature, comprises:
acquiring a fourth temperature threshold and a fifth threshold;
obtaining a fourth difference value of the first coil temperature and the first temperature threshold value based on the first coil temperature and the first temperature threshold value;
comparing the fourth difference value with a fourth temperature threshold value to obtain a first comparison result;
comparing the current indoor temperature with a fifth threshold value to obtain a second comparison result;
comparing the first difference value with a preset first temperature threshold value to obtain a third comparison result;
and judging whether the refrigerating effect of the air conditioning system is reduced or not based on the first comparison result, the second comparison result and the third comparison result.
8. A control device comprising a processor and a storage device, the storage device being adapted to store a plurality of computer programs, characterized in that the computer programs are adapted to be loaded and run by the processor to perform the refrigerant leak detection method in an air conditioning system according to any one of claims 1 to 7.
9. A computer readable storage medium, in which a plurality of computer programs are stored, characterized in that the computer programs are adapted to be loaded and run by a processor to perform the refrigerant leakage detection method in an air conditioning system according to any one of claims 1 to 7.
10. An air conditioning system comprising a control device, wherein the control device is operative to perform the method for detecting refrigerant leakage in an air conditioning system as set forth in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310947643.6A CN117006596A (en) | 2023-07-28 | 2023-07-28 | Refrigerant leakage detection method, control device and storage medium in air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310947643.6A CN117006596A (en) | 2023-07-28 | 2023-07-28 | Refrigerant leakage detection method, control device and storage medium in air conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117006596A true CN117006596A (en) | 2023-11-07 |
Family
ID=88570483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310947643.6A Pending CN117006596A (en) | 2023-07-28 | 2023-07-28 | Refrigerant leakage detection method, control device and storage medium in air conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117006596A (en) |
-
2023
- 2023-07-28 CN CN202310947643.6A patent/CN117006596A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110895024B (en) | Refrigerant leakage detection method and air conditioner | |
| CN113266973B (en) | Control system and method for a refrigeration or heating ventilation and air conditioning system | |
| CN105091215B (en) | Multi-gang air-conditioner lacks the start-up detection method and device of fluorine | |
| CN113432254B (en) | Air conditioner blockage identification method and device, air conditioner and readable storage medium | |
| WO2014040310A1 (en) | Device and method for monitoring operating condition of equipment based on reverse carnot principle | |
| WO2015058592A1 (en) | Method and device for controlling coolant in dehumidifier | |
| CN112178868B (en) | Air conditioner fault detection method and device | |
| US10941956B2 (en) | Data processing method, refrigerant leakage detection method, system failure detection method and system performance detection method | |
| CN107906671B (en) | Refrigerant quantity judging method and system | |
| CN110762785B (en) | Air conditioner and air conditioner refrigerant leakage detection method | |
| WO2023005323A1 (en) | Fault monitoring method for air conditioning unit | |
| CN110762743A (en) | Air conditioner and air conditioner refrigerant leakage detection method | |
| JP2020008204A (en) | Sensor state determination device, sensor state determination method and program | |
| CN110173816B (en) | Detection method and detection device for air conditioner refrigerant leakage | |
| CN109725220B (en) | Detection method, system and device for transformer oil cooling loop | |
| CN107940675B (en) | Central air conditioning system, auxiliary machine starting self-diagnosis method and self-diagnosis device thereof | |
| CN117665460A (en) | Method and system for detecting internal abrasion state of compressor | |
| CN111457550B (en) | Air conditioner refrigerant shortage detection method and device and air conditioner | |
| CN117006596A (en) | Refrigerant leakage detection method, control device and storage medium in air conditioning system | |
| CN113028586B (en) | Control protection method, device and system for compressor | |
| CN113028585B (en) | Control protection method, device and system for compressor | |
| CN117167900A (en) | Four-way valve switching fault detection method, electronic equipment and air conditioning unit | |
| CN109752624B (en) | Liquid cooling flow path on-off detection method and device | |
| CN110857812B (en) | Air conditioner and air conditioner refrigerant leakage detection method | |
| CN112179592B (en) | Refrigeration system detection method, device and readable medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |