CN110736183A - Detection method and device for leakage of air-conditioning refrigerants - Google Patents
Detection method and device for leakage of air-conditioning refrigerants Download PDFInfo
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- CN110736183A CN110736183A CN201810789184.2A CN201810789184A CN110736183A CN 110736183 A CN110736183 A CN 110736183A CN 201810789184 A CN201810789184 A CN 201810789184A CN 110736183 A CN110736183 A CN 110736183A
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- 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
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- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- 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
Abstract
The invention provides a detection method and a device for air conditioner refrigerant leakage, wherein the detection device comprises an outdoor unit and an indoor unit, a compressor is communicated with an outdoor unit coil pipe through a four-way valve, an expansion valve is arranged on the outdoor unit coil pipe, a gas collection chamber is arranged in the indoor unit, a refrigerant concentration sensor is arranged in the gas collection chamber, a temperature and humidity sensor is arranged in the indoor unit, a controller is arranged on the indoor unit, a fan is arranged on the indoor unit, and the controller judges whether a refrigerant leaks or not according to a detection result and a pre-stored relation and executes a corresponding control program.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for detecting leakage of air conditioner refrigerants.
Background
With the continuous development of industrialization and the continuous acceleration of urbanization, the requirements of people on the quality of life are continuously improved, and the use of air conditioners is more and more common.
The air conditioner carries out heat transportation by depending on a refrigerant, the refrigerant charging amount of the air conditioner with good performance is , and the performance of the air conditioner is reduced more or less, for a user of the air conditioner, the problem that the air conditioner does not refrigerate or has poor refrigeration effect is likely to occur when the air conditioner is used, and the reason of the problem is refrigerant leakage, the refrigerant leakage can occur 1, the refrigerant leakage exists in the air conditioner before the air conditioner is installed, 2, the refrigerant leakage occurs in the air conditioner when the air conditioner is installed, and 3, the refrigerant leakage occurs after the air conditioner is operated time due to other reasons.
In addition, pipelines in the air conditioner are welded more, and the indoor and outdoor air conditioners are connected through connecting pipes. Therefore, poor welding or loose connection can cause refrigerant leakage. The refrigerant leakage not only causes the performance of the air conditioner to be reduced, so that the compressor runs under a poor condition, but also even causes the condition that the compressor is damaged when the compressor is serious; with the use of the flammable refrigerants R32 and R290, the leakage thereof may cause explosion, which endangers the safety of users, and therefore, it is necessary to detect the refrigerant leakage comprehensively and effectively.
At present, the refrigerant leakage phenomenon is generally found when a user feeds back that the air conditioner does not refrigerate or has poor refrigerating effect after installing the air conditioner, the refrigerant leakage amount of the air conditioning system is usually more at the moment, the user life is greatly influenced, and the compressor is directly started to cause permanent damage or even explosion when the leakage amount is more.
In the existing refrigerant leakage detection method, whether refrigerant leakage occurs or not is judged only by comparing the indoor coil temperature with the set coil temperature, but when the refrigerant does not leak and the difference between the indoor environment temperature and the indoor coil temperature is large, the indoor coil temperature also changes sharply, so that the difference between the indoor coil temperature and the set coil temperature is large, and the refrigerant leakage occurs through misjudgment, therefore, the refrigerant detection method in the prior art is logically judged as a single , and misjudgment is easy to occur.
Therefore, reliable, safe, fast and accurate refrigerant leakage detection methods are technical problems to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for detecting leakage of air-conditioning refrigerants, so as to quickly and safely detect whether the air-conditioning refrigerant leaks.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
air conditioner refrigerant leakage detection method, comprising the following detection steps:
ST1, starting the air conditioner and detecting the outdoor environment temperature;
ST2, detecting th refrigerant pressure value P1And determining the th refrigerant pressure value P1Whether the pressure is not lower than the preset pressure value P of the refrigerantPreparation ofNamely, whether P is determined1≥PPreparation ofIf yes, entering ST3, otherwise, judging that the refrigerant leaks;
ST3 starting the compressor and running for a preset time N1Acquiring the current operation mode of the air conditioner and the current temperature and humidity near the air collecting chamber of the indoor unit, and inquiring the corresponding compressor frequency F from a pre-stored relation by the controller according to the current operation mode, the outdoor environment temperature and the temperature and humidity near the air collecting chamber of the indoor unita；
ST4. find compressor frequency FaWhen the air conditioner works, the temperature and the humidity of the air near the air collecting chamber detected by the corresponding temperature and humidity sensor are fed back to the controller, and the controller 11 inquires and obtains the frequency F of the compressor stored in the storage unit 12aAnd the refrigerant concentration threshold C under the temperature and the humidityPreparation ofThe concentration C of the refrigerant in the gas collection chamber is detected by a concentration sensor arranged in the gas collection chamber 181Is judged at T1Within time, C1Whether or not it is higher than CPreparation ofIs there a If it is judged as C1＞CPreparation ofThen it is judged as refrigerant leakageIf it is judged as C1≤CPreparation ofThen, go to step ST 5;
ST5. increasing compressor frequency, running time N2Detecting the second pressure value P of the refrigerant under the high frequency of the compressor2And determining whether P is present2≥PPreparation ofAnd P is2-P1＞ΔPaIf so, determining that the refrigerant is not leaked, and continuing the operation of the air conditioner, otherwise, entering the step ST 6;
ST6, turning off compressor, turning on fan, replacing air in indoor unit, and detecting second concentration C of refrigerant by refrigerant concentration sensor2Judgment of C2And C1Whether the difference is less than a preset value Δ CaImmediately judge whether or not C is present2-C1＜ΔCaIs there a If yes, judging that the refrigerant is not leaked, and continuing to operate the air conditioner; if not, go to step ST 7;
ST7. again at the compressor frequency FaRunning the compressor for a running time N3Detecting the third pressure value P of the refrigerant3And through P3And P2Whether the difference is greater than a preset value Δ P2Namely, whether P is determined3-P2＞ΔP2If not, the air conditioner is judged to be leaked.
, in step ST1, the current outdoor environment temperature value of the outdoor unit is detected by the environment bulb installed on the bulb holder of the outdoor unit, the controller obtains the minimum refrigerant pressure value at which refrigerant leakage does not occur at the current outdoor environment temperature by querying the detected current outdoor environment temperature, and the minimum refrigerant pressure value is the preset refrigerant pressure value PPreparation of，PPreparation ofThe corresponding relation with the outdoor ambient temperature is a pre-stored relation arranged in the storage unit.
, in step ST2, the th refrigerant pressure value P1Detected by a pressure switch connected with the pipeline system of the outdoor unit.
step, in ST3, the controller stores in advance from a memory provided in the storage unitIn the relationship, the current operation mode, the current outdoor environment temperature and the corresponding compressor frequency F under the current indoor environment temperature are searcheda。
step, in ST4 step CPreparation ofFor storage in a storage unit together with the compressor frequency FaRefrigerant concentration threshold, C, corresponding to indoor temperature and humidityPreparation ofThe maximum refrigerant concentration in the gas collecting chamber is obtained when the refrigerant subjected to temperature and humidity correction is not leaked under the frequency of the compressor.
step, in ST5, a preset Δ PaSetting a difference threshold value delta P in the storage unit when the preset refrigerant pressure change does not leakaOperating frequency F obtained by querying compressoraAnd compressor frequency mF for high frequency operationaStored in a pre-stored relationship in the storage unit, the controller may be obtained from a query.
And , judging whether the refrigerant leaks or not in ST2, if so, judging that the refrigerant leaks or not, and the compressor is in a severe leakage state and cannot be started, judging whether the refrigerant leaks or not in a moderate leakage state and not in a high-frequency operation state in ST4, judging whether the refrigerant leaks or not in a slight leakage state in ST7, and displaying a corresponding refrigerant leakage fault code on a display unit through a communication unit by the controller.
And , stopping the indoor unit when serious leakage and/or medium leakage occurs according to different leakage states of the refrigerant, and replacing the air in the space where the indoor unit is located by starting the running program of the fan to ensure the quality safety of the indoor air.
Compared with the prior art, the method for detecting the refrigerant leakage of the air conditioner has the following advantages:
(1) the air conditioner refrigerant leakage detection method comprises the steps of detecting refrigerant pressure values and refrigerant concentration in a gas collecting chamber through a compressor in different states, analyzing the refrigerant leakage condition step by step through a pre-stored relation arranged in a storage unit by utilizing cross detection and difference value comparison, if serious leakage occurs, directly not starting the compressor, and further avoiding damage to the compressor and an air conditioner, displaying a corresponding refrigerant leakage fault code on a display unit through a communication unit by a controller, if moderate leakage occurs, the compressor cannot run at high frequency, avoiding damage to the air conditioner by steps, displaying the corresponding refrigerant leakage fault code on the display unit through the communication unit by the controller, and if slight leakage occurs, changing gas in a space where an indoor unit is located, then detecting the concentration and the refrigerant pressure values through steps, judging whether slight leakage occurs through the pre-stored relation, and further avoiding low refrigerating or heating efficiency of the air conditioner due to slight leakage for a long time, and influencing user experience.
(2) According to the detection method for air conditioner refrigerant leakage, the detection factors are corrected by adopting a multi-level difference comparison method with elements in different states and a cross detection mode of two detection elements, namely the refrigerant concentration and the refrigerant pressure value , inside and outside, so that misjudgment is reduced, the accuracy of refrigerant leakage detection is improved, the damage of an air conditioner compressor and a refrigerating device in the step during the use of an air conditioner is avoided to the greatest extent, and the comfort level of user experience is improved.
Another object of of the present invention is to provide a device for detecting coolant leakage of air conditioners, which includes an outdoor unit and an indoor unit, wherein a compressor, an outdoor heat exchanger and an outdoor air supply fan are disposed in the outdoor unit, two sides of the outdoor heat exchanger are provided with outdoor coils, the compressor is communicated with the outdoor coils through a four-way valve, the end of the compressor is communicated with the four-way valve through a compressor suction pipe, the other end of the compressor is communicated with the four-way valve through a compressor discharge pipe, an expansion valve is disposed on the outdoor coils, an indoor heat exchanger and an indoor air supply fan are disposed in the indoor unit, two sides of the indoor heat exchanger are provided with indoor coils, the indoor coils and the outdoor coils are communicated through a connection valve, a plenum chamber is disposed in the indoor unit, the plenum chamber is disposed at a position close to the indoor heat exchanger and connected with the indoor coils, a coolant concentration sensor is disposed in the plenum chamber, the indoor unit is provided with a temperature and humidity sensor for detecting the ambient temperature and humidity of the indoor unit, a controller is disposed on the indoor unit, a storage unit is disposed for storing a prestored relation for determining, a coolant leakage, a fan is disposed on the indoor unit, and a method for controlling whether the indoor unit, and controlling.
, the sensor unit comprises an outdoor temperature sensor, a refrigerant pressure sensor, a refrigerant concentration sensor and an indoor temperature and humidity sensor, the outdoor temperature sensor can detect the current outdoor environment temperature value of the outdoor unit through an environment temperature sensing bag arranged on a temperature sensing bag support of the outdoor unit, the refrigerant concentration sensor is used for detecting the refrigerant concentration in the gas collection chamber, the indoor temperature and humidity sensor is used for detecting the temperature and humidity of the space where the gas collection chamber is located, the refrigerant pressure sensor is used for detecting the pipeline pressure of the outdoor unit coil, the outdoor temperature sensor, the refrigerant concentration sensor, the refrigerant pressure sensor and the indoor temperature and humidity sensor are communicated with the controller through a circuit board and can feed information back to the controller, the controller comprises an acquisition module, a judgment module and a control module, the controller receives the acquired information through the acquisition module and judges the acquired information, the control module judges the pre-storage relation and the judgment instruction, the control module controls the air conditioner to continue to operate, or starts the fan to replace the gas where the indoor unit is located, or displays the protection instruction of the judgment result and stops the air conditioner through the display unit, or implements communication and data transmission through the communication unit and the storage unit according.
The air-conditioning refrigerant leakage detection devices and the air-conditioning refrigerant leakage detection method have the same advantages compared with the prior art, and are not repeated herein.
Drawings
The accompanying drawings, which form a part hereof , are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, an illustrative embodiment of the invention and the description of the invention for purposes of explanation and not limitation, of the invention, wherein:
FIG. 1 is a schematic diagram of a refrigerant circuit of an air conditioning apparatus according to an embodiment of the present invention;
fig. 2 is a method for detecting refrigerant leakage of an air conditioning apparatus according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a flow of detecting refrigerant leakage of an air conditioning apparatus according to an embodiment of the present invention;
FIG. 4 is a functional block diagram of an air conditioning unit controller according to an embodiment of the present invention;
description of reference numerals:
1-outdoor unit, 2-indoor unit, 3-compressor, 4-outdoor heat exchanger, 5-indoor heat exchanger, 6-four-way valve, 7-outdoor air supply fan, 8-indoor air supply fan, 9-expansion valve, 10-connecting valve, 11-controller, 12-storage unit, 13-indoor unit coil, 14-outdoor unit coil, 15-extension coil, 16-compressor discharge pipe, 17-compressor suction pipe, 18-air collection chamber and 19-fan.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of the present invention, rather than all embodiments.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. at a certain posture (as shown in the figure), and if the certain posture is changed, the directional indicator is changed accordingly.
Moreover, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a series of steps or elements of is not necessarily limited to the explicitly listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus, based on the availability to those skilled in the art, and such that combinations of technical solutions when incompatible or impractical are not available are not considered to be within the scope of the present claims.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
method and device for detecting air conditioner refrigerant leakage, fig. 1 discloses a refrigerant circuit diagram of an air conditioner device, comprising an outdoor unit 1 and an indoor unit 2, wherein the outdoor unit 1 is provided with a compressor 3, an outdoor heat exchanger 4 and an outdoor air supply fan 7, two sides of the outdoor heat exchanger 4 are provided with outdoor coil pipes 14, the compressor 3 is communicated with the outdoor coil pipes 14 through a four-way valve 6, the end of the compressor 3 is communicated with the four-way valve 6 through a compressor suction pipe 17, the other end of the compressor 3 is communicated with the four-way valve 6 through a compressor discharge pipe 16, an expansion valve 9 is arranged on the outdoor coil pipe 14, the indoor heat exchanger 5 and the indoor air supply fan 8 are arranged in the indoor unit 2, the indoor coil pipes 13 are arranged on two sides of the indoor heat exchanger 5, the indoor coil pipe 13 and the outdoor coil pipe 14 are communicated through a connecting valve 10, a gas collection chamber 18 is arranged in the indoor unit 2, the gas collection chamber 18 is provided with a refrigerant concentration sensor, the indoor unit 2 is provided with a temperature and humidity sensor for detecting the environment temperature and humidity, the indoor unit 2 is provided with a controller 11, a storage unit 12 is arranged on the indoor unit for storing the relationship for detecting the indoor unit, and a pre-stored in the indoor unit, and a program for controlling the indoor unit, and a fan, and a pre-storing the indoor unit, and a pre.
In embodiments of the present invention, an extension coil 15 is disposed between the indoor unit coil 13 and the outdoor unit coil 14, and the extension coil 15 is communicated with the indoor unit coil 13 and the outdoor unit coil 14 through the connection valve 10, respectively.
embodiments of the present invention include that the sensor unit includes an outdoor temperature sensor, a refrigerant pressure sensor, a refrigerant concentration sensor, and an indoor temperature and humidity sensor, the outdoor temperature sensor can detect a current outdoor ambient temperature value of an outdoor unit through an ambient thermal bulb disposed on a thermal bulb support of the outdoor unit, the refrigerant concentration sensor is used to detect a refrigerant concentration in the collection chamber 18, and may be an ultrasonic sensor, the indoor temperature and humidity sensor is used to detect a temperature and a humidity of a space in which the collection chamber 18 is located, the refrigerant pressure sensor is used to detect a pipeline pressure of the coil 14 of the outdoor unit, the outdoor temperature sensor, the refrigerant concentration sensor, the refrigerant pressure sensor, and the indoor temperature and humidity sensor are communicated with the controller 11 through a circuit board and can feed back information to the controller 11, the controller 11 includes a collection module, a judgment module, and a control module, the controller 11 receives collected information through the collection module, judges a collected information, a pre-storage relationship and a judgment instruction, and controls the air conditioner to continue to operate, or starts a fan to replace indoor unit, or controls an air conditioner to continue to operate and stop through a display unit, a storage unit, a data transmission unit and a display unit through the communication unit 11.
At present, the actual use state of the air conditioner in the operation process cannot be accurately judged due to inaccurate parameter formulation and frequent working condition change in the existing refrigerant leakage process, and further the problem of poor refrigeration and heating effects is solved.
The embodiment of the invention further discloses a detection method for air conditioner refrigerant leakage, which is shown in figures 2-4 and comprises the following steps:
step 1, ST1, starting an air conditioner and detecting the outdoor environment temperature;
the current outdoor environment temperature and the minimum refrigerant pressure value without refrigerant leakage under the current outdoor environment temperature have fixed corresponding relation, and the minimum refrigerant pressure value without refrigerant leakage under the current outdoor environment temperature, namely the preset refrigerant pressure value P, can be obtained by using the detected current outdoor environment temperaturePreparation of，PPreparation ofThe corresponding relation with the outdoor ambient temperature is a pre-stored relation arranged in the storage unit.
Step 2, ST2. detecting the pressure value P of the th refrigerant1And determining the th refrigerant pressure value P1Whether the pressure is not lower than the preset pressure value P of the refrigerantPreparation ofNamely, whether P is determined1≥PPreparation of？
Preferably, the th refrigerant pressure value P may be detected by a pressure switch connected to a pipe system of the outdoor unit1The th refrigerant pressure value is the refrigerant pressure value detected at the current outdoor environment temperature, passing the refrigerant pressure value P1The minimum refrigerant pressure value P which does not generate refrigerant leakage under the current outdoor environment temperaturePreparation ofComparing to obtain th refrigerant pressure value P1Through the feedback to the controller 11 after the detection, the controller 11 obtains the P in the storage unit 12 through the communication modulePreparation ofWhether the air conditioning system can start the compressor can be known through the preliminary judgment of the judgment module in the controller 11. If yes, entering step 3, and starting the compressor; if not, the refrigerant is judged to be leaked, the compressor is not started, and the controller displays the judgment result signal through the display unit.
The method firstly judges whether the compressor can be started or not through the pressure of the refrigerant in the outdoor coil pipe, if the refrigerant leaks, the compressor is directly started after the air conditioner is started, and -step damage is caused to the normal use of the air conditioner.
And step 3: ST3. if P1≥PPreparation ofThen start the compressor and run for a preset time N1Acquiring the current operation mode of the air conditioner and the current temperature and humidity near the air collecting chamber 18 of the indoor unit, and inquiring the corresponding compressor frequency F from a pre-stored relation by the controller according to the current operation mode, the outdoor environment temperature and the temperature and humidity near the air collecting chamber of the indoor unita。
It can be understood that the current operation mode of the air conditioner may include a cooling mode and a heating mode, and the controller may search for the corresponding normal compressor frequency F according to the current outdoor environment temperature, the current indoor environment temperature and the current operation modeaFor example, when the operation mode of the air conditioner is the cooling mode, the outdoor environment temperature conditions are classified into high temperature cooling (for example, 33 ℃ or higher), medium temperature cooling (for example, 26 ℃ to 33 ℃) and low temperature cooling (for example, 26 ℃ or lower), and the indoor environment temperature conditions are classified into high frequency mode (for example, 18 ℃ or lower), medium frequency mode (for example, 18 ℃ to 26 ℃) and low frequency mode (for example, 26 ℃ or higher), each of the outdoor environment temperature conditions corresponds to 3 indoor environment temperature conditions, and the frequency of the compressor is 9 parameters. Therefore, the controller can conveniently search the compressor frequency F corresponding to the current operation mode, the current outdoor environment temperature and the current indoor environment temperature from the pre-stored relationa。
After a predetermined time N1After the operation, the air conditioner is operated and enters a stable state, the current indoor actual environment temperature is relatively stable, the sensor unit is operated and enters the stable operation state, the acquired data information is more reliable, the accuracy of subsequent analysis and judgment is ensured, and N is preset under the condition of 1Is a value between 1min and 30 min.
And 4, step 4: ST4. find compressor frequency FaWhen the air conditioner works, the temperature and the humidity of the air near the air collecting chamber 18 detected by the corresponding temperature and humidity sensor are fed back to the controller, and the controller 11 inquires and obtains the frequency F of the compressor stored in the storage unit 12aAnd the refrigerant concentration threshold C at the temperaturePreparation ofDetection of the collected gas by means of a concentration sensor arranged in the collection chamber 18Indoor refrigerant concentration C1Is judged at T1Within time, C1Whether or not it is higher than CPreparation of？
Preferably, the storage unit 12 stores a compressor frequency F in this embodimentaRefrigerant concentration threshold C corresponding to indoor temperature and humidityPreparation of，CPreparation ofThe maximum refrigerant concentration in the air collecting chamber 18 when the refrigerant corrected by temperature and humidity does not leak under the frequency of the compressor is f(T)The influence value of humidity on the concentration of refrigerant is f(H2O)，f(T)And f(H2O)Can be obtained by experimental calculation. Under the influence of different compressor frequencies and different humidity and temperature, corresponding different CPreparation of，CPreparation ofAnd Fa、f(T)、f(H2O)Is prestored in the storage unit 12, the controller can obtain the compressor frequency F according to the queryaAnd the temperature and the humidity detected by the temperature and humidity sensor are further inquired to obtain CPreparation of。
As examples of the invention, two or more concentration sensors may be disposed in the plenum chamber 18, and the plenum chamber 18 is disposed near the connection of the indoor heat exchanger 5 to the indoor unit coil 13 to allow the leaking refrigerant to diffuse into the plenum chamber 18 first, by judging at T1Within time, C1Whether or not it is higher than CPreparation ofThis may be done by at T1Within the time, judging whether C appears1＞CPreparation ofIf C is present1＞CPreparation ofJudging as refrigerant leakage, if C1≤CPreparation ofThen, go to step ST 5; or at T1Over time, C continues to appear1＞CPreparation ofI.e. detecting C1＞CPreparation ofAnd continues for time periods T2，T2≤T1If not, the step 5 is entered.
And 5: ST5. if C1≤CPreparation ofIf the refrigerant is not leaked, the frequency and the running time N of the compressor are increased2Detecting the second pressure value P of the refrigerant under the high frequency of the compressor2And determining whether P is present2≥PPreparation ofAnd P is2-P1＞ΔPaIf so, it is determined that the refrigerant is not leaked, and the air conditioner continues to operate, otherwise, the process proceeds to step ST6.
Preferably, in the judgment of C1≤CPreparation ofThen, the operation frequency of the compressor can be increased and adjusted to mFaM > 1, by detecting the operating time N at high frequency2Running time N2For a predetermined time, N 2The value of (1) is 5 min-20 min, the air conditioning system reaches a stable operation state, and the second pressure value P of the refrigerant in the refrigerant pipeline2With compressor in Fa th pressure value P of refrigerant detected during operation1Difference of (d) from a predetermined Δ PaMaking a comparison only if P is satisfied simultaneously2≥PPreparation ofAnd P is2-P1＞ΔPaThen step 6 is entered and step is entered for determination of Δ PaSetting a difference threshold value delta P in the storage unit 12 when the preset refrigerant pressure change does not leakaOperating frequency F obtained by querying compressoraAnd compressor frequency mF for high frequency operationaRegarding, step , Δ PaOperating frequency F obtained by querying compressoraAnd compressor frequency mF for high frequency operationaStored in a pre-stored relationship in the storage unit, the controller may be obtained from a query.
The invention can improve the running frequency of the compressor by improving the running frequency of the compressor according to the judgment of the previous concentration detection result, improve the frequency of the compressor, judge whether the refrigerant leaks or not according to the variation of the pressure value of the refrigerant, and avoid the deviation caused by the influence of air temperature and humidity factors, thereby causing misjudgment, if the high-frequency running of the compressor is directly started without the previous judgment, the compressor and an air conditioning device can be permanently damaged, the normal use of the air conditioner is influenced, and even disastrous results are brought.
Step 6: ST6. if P2If the judgment condition of ST5 is not met, the compressor is closed, the fan is started, the gas in the space where the indoor unit is located is replaced, and the second concentration C of the refrigerant is detected by the refrigerant concentration sensor2Judgment of C2And C1Whether the difference is less than a preset value Δ CaImmediately judge whether or not C is present2-C1＜ΔCa？
As the embodiments of the present invention, when the air in the space where the air conditioner is located is replaced by the fan, the following control methods can be specifically adopted:
controlling the fan to continuously operate and controlling the indoor unit of the air conditioner to be closed for an operating time T3 case T3Selecting a numerical value from 5min to 10 min;
or controlling the fan to start and stop periodically, wherein the start-stop time of the fan is T3For example, the air conditioner is turned on for minutes and turned off for minutes, the arrangement avoids the influence caused by long-time accumulation or other interference sources detected by the concentration detection unit, thereby causing misjudgment, and the second concentration C of the refrigerant is detected again after the compressor is turned off and the fan replaces the air in the space where the indoor unit is positioned2Passing through the second concentration C of refrigerant2The difference value of the concentration of the refrigerant and the th concentration of the refrigerant and the preset difference value variable quantity delta CaBy comparison, if C2And C1Is less than Δ CaIf the refrigerant is determined not to leak, the air conditioner continues to operate, and if C is determined not to leak, the air conditioner continues to operate2-C1≥ΔCaThen, the judgment of step 7 is made.
The concentration of the refrigerant in the gas collecting chamber is detected by the same refrigerant concentration detection device under different states, including different compressor running states and different indoor gas environment states, so that the detection deviation caused by the influence of other factors on the detection result is effectively avoidedaSetting a difference threshold value delta C when the preset refrigerant concentration change does not leak in the storage unitaOperating frequency F obtained by querying compressoraAnd compressor frequency mF for high frequency operationaIndoor ring before starting fanThe ambient temperature and humidity are stored in the storage unit in a pre-stored relationship, and the controller can obtain the ambient temperature and humidity according to query.
The concentration of the refrigerant in the gas collecting chamber is detected again after the gas in the space where the indoor unit is located is replaced by the fan, and the difference value between the concentration of the refrigerant detected after the compressor is started up and the concentration of the refrigerant detected after the compressor is started up is used as a judgment basis, so that the detection accuracy when the refrigerant slightly leaks is greatly improved.
The invention specifically adopts which mode to control the fan and the indoor unit, can be set according to actual needs and conditions, and is not limited by the application.
And 7: ST7. if C2-C1≥ΔCaAgain at the compressor frequency FaRunning the compressor for a running time N2Detecting the third pressure value P of the refrigerant3And through P3And P2Difference of (d) to a predetermined Δ P2And judging whether the refrigerant leaks.
Preferably, in ST2, if the refrigerant is determined to leak, the refrigerant is determined to be in a severe leakage state, and the compressor is not started; if it is determined in ST4 that leakage of the refrigerant occurs, it is determined that the refrigerant is in a middle leakage state and the compressor cannot be operated at a high frequency; if it is determined in ST7 that a refrigerant leaks, the refrigerant leakage is determined to be in a slight leakage state, and the controller displays a corresponding refrigerant leakage failure code on the display unit through the communication unit.
It will be appreciated that if C is detected in step 62-C1≥ΔCaIf the refrigerant leaks slightly even if the refrigerant leaks, and if the refrigerant leaks seriously or moderately, the operation of the compressor is damaged instantaneously, in step 3, the compressor is not started, or in step 5, the compressor cannot be operated at high frequency, and in step 7, the detection in step 6 is judged to be again by using the frequency F of the compressor againaRunning the compressor at the same frequency as the initially queried compressor running frequency, running time N again3Running time N3For a predetermined time, N 3The value of (a) is 5min to 20min, and the air conditioning system can run stablyTo detect the third pressure value P of the refrigerant again3Passing through the third pressure value P of the refrigerant3And a second pressure value P of the refrigerant2Difference of (d) to a predetermined Δ P2Making a judgment, the preset delta P2Δ P for the prestored relationship set in the storage unit2And FaAnd mFaRelated, Δ P2For the storage unit arranged in the compressor FaFrequency sum mFaWhen the frequency is different, presetting a difference threshold value delta P when the pressure change of the refrigerant is not leakedaOperating frequency F obtained by querying compressoraAnd compressor frequency mF for high frequency operationaThe refrigerant leakage detection method based on the concentration detection structure has the advantages that the refrigerant leakage is directly judged in the step 6 according to the concentration detection structure, the final refrigerating or heating effect of the air conditioner is prevented from being deteriorated due to long-time slight leakage, the accuracy of detecting whether the refrigerant leaks is improved in the aspect of , and accordingly the comfort of users is guaranteed.
The air conditioner refrigerant leakage detection method comprises the steps of detecting refrigerant pressure values and refrigerant concentration in a gas collecting chamber through a compressor in different states, analyzing the refrigerant leakage condition step by step through a pre-stored relation arranged in a storage unit by utilizing cross detection and difference value comparison, if serious leakage occurs, directly not starting the compressor, and further avoiding damage to the compressor and an air conditioner, displaying a corresponding refrigerant leakage fault code on a display unit through a communication unit by a controller, if moderate leakage occurs, the compressor cannot run at high frequency, avoiding damage to the air conditioner by steps, displaying the corresponding refrigerant leakage fault code on the display unit through the communication unit by the controller, and if slight leakage occurs, changing gas in a space where an indoor unit is located, then detecting the concentration and the refrigerant pressure values through steps, judging whether slight leakage occurs through the pre-stored relation, and further avoiding low refrigerating or heating efficiency of the air conditioner due to slight leakage for a long time, and influencing user experience.
According to the detection method for air conditioner refrigerant leakage, the detection factors are corrected by adopting a multi-level difference comparison method with elements in different states and a cross detection mode of two detection elements, namely the refrigerant concentration and the refrigerant pressure value , inside and outside, so that misjudgment is reduced, the accuracy of refrigerant leakage detection is improved, the damage of an air conditioner compressor and a refrigerating device in the step during the use of an air conditioner is avoided to the greatest extent, and the comfort level of user experience is improved.
In the embodiments of the present invention, the controller 11 stops the indoor unit when a serious leakage and/or a medium leakage occurs according to different states of refrigerant leakage, and changes the air in the space where the indoor unit 2 is located by starting the operation program of the fan 19, thereby ensuring the safety of indoor air quality.
The operation program of the fan 19 comprises two states of continuous operation and periodic start-stop operation, when the serious leakage of the refrigerant is detected, a stronger refrigerant discharge mode is adopted, namely the controller controls the fan to continuously operate, the fan is continuously operated to continuously ventilate, meanwhile, an air conditioner internal unit stops working to prevent more refrigerants leaked into a room, if the medium leakage of the refrigerant is detected, the controller controls the fan to periodically start and stop, fresh air is continuously supplied to the room, the period of the periodic start-stop is generally within 10min, the start time and the stop time of the fan can be the same or different, the final closing program of the fan can be manually operated, and the automatic relation can be realized according to the control program, such as the detection data of the refrigerant concentration in the time or the air collection room.
Further, it is understood by those skilled in the art that in the detection method of the present invention, each module or each step may be implemented by a general-purpose computing device, they may be centralized on a single computing device or distributed on a network formed by a plurality of computing devices, and alternatively, they may be implemented by program codes executable by the computing devices, so that they may be pre-stored in the storage unit 12 to be executed by the computing devices, or they may be respectively fabricated into each integrated circuit module, or a plurality of modules or steps therein may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1, air conditioner refrigerant leakage detection method, characterized by that, including the following detection steps:
ST1, starting the air conditioner and detecting the outdoor environment temperature;
ST2, detecting th refrigerant pressure value P1And determining the th refrigerant pressure value P1Whether the pressure is not lower than the preset pressure value P of the refrigerantPreparation ofNamely, whether P is determined1≥PPreparation ofIf yes, entering ST3, otherwise, judging that the refrigerant leaks;
ST3 starting the compressor and running for a preset time N1Acquiring the current operation mode of the air conditioner and the current temperature and humidity near the air collecting chamber of the indoor unit, and inquiring the corresponding compressor frequency F from a pre-stored relation by the controller according to the current operation mode, the outdoor environment temperature and the temperature and humidity near the air collecting chamber of the indoor unita；
ST4. find compressor frequency FaWhen the air conditioner works, the temperature and the humidity of the air near the air collecting chamber detected by the corresponding temperature and humidity sensor are fed back to the controller, and the controller inquires and obtains the frequency F of the compressor stored in the storage unitaAnd the refrigerant concentration threshold C under the temperature and the humidityPreparation ofThe concentration C of the refrigerant in the gas collection chamber is detected by a concentration sensor arranged in the gas collection chamber1Is judged at T1Within time, C1Whether or not it is higher than CPreparation ofIs there a If it is judged as C1＞CPreparation ofJudging as refrigerant leakage, and judging as C1≤CPreparation ofThen, go to step ST 5;
ST5. increasing compressor frequency, running time N2Detecting the second pressure value P of the refrigerant under the high frequency of the compressor2And determining whether P is present2≥PPreparation ofAnd P is2-P1＞ΔPaIf so, determining that the refrigerant is not leaked, and continuing the operation of the air conditioner, otherwise, entering the step ST 6;
ST6, turning off compressor, turning on fan, replacing air in indoor unit, and detecting second concentration C of refrigerant by refrigerant concentration sensor2Judgment of C2And C1Whether the difference is less than a preset value Δ CaImmediately judge whether or not C is present2-C1＜ΔCaIs there a If yes, judging that the refrigerant is not leaked, and continuing to operate the air conditioner; if not, go to step ST 7;
ST7. again at the compressor frequency FaRunning the compressor for a running time N3Detecting the third pressure value P of the refrigerant3And through P3And P2Whether the difference is greater than a preset value Δ P2Namely, whether P is determined3-P2＞ΔP2If not, the air conditioner is judged to be leaked.
2. The method for detecting leakage of air-conditioning refrigerants according to claim 1, wherein in step ST1, the current outdoor temperature value of the outdoor unit is detected by an environment thermal bulb installed on a thermal bulb bracket of the outdoor unit, the controller obtains a minimum refrigerant pressure value at which refrigerant leakage does not occur at the current outdoor temperature by querying the detected current outdoor temperature, and the minimum refrigerant pressure value is the preset refrigerant pressure value PPreparation of，PPreparation ofThe corresponding relation with the outdoor ambient temperature is a pre-stored relation arranged in the storage unit.
3. The method for detecting leakage of air-conditioning refrigerants of claim 2, wherein in step ST2, the pressure value P of th refrigerant is1Detected by a pressure switch connected with the pipeline system of the outdoor unit.
4. The detection method for the leakage of the refrigerant of air conditioners according to claim 2 or 3The method is characterized in that, in step ST3, the controller searches the current operation mode, the current outdoor environment temperature, and the compressor frequency F corresponding to the current indoor environment temperature from the pre-stored relation set in the storage unita。
5. The method for detecting leakage of air-conditioning refrigerants of claim 4, wherein in step ST4, the step C is performedPreparation ofFor storage in a storage unit together with the compressor frequency FaRefrigerant concentration threshold, C, corresponding to indoor temperature and humidityPreparation ofThe maximum refrigerant concentration in the gas collecting chamber is obtained when the refrigerant subjected to temperature and humidity correction is not leaked under the frequency of the compressor.
6. The method for detecting leakage of air-conditioning refrigerants of claim 5, wherein in step ST5, the predetermined Δ P is setaSetting a difference threshold value delta P in the storage unit when the preset refrigerant pressure change does not leakaOperating frequency F obtained by querying compressoraAnd compressor frequency mF for high frequency operationaStored in a pre-stored relationship in the storage unit, the controller may be obtained from a query.
7. The method for detecting refrigerant leakage in air conditioners according to claim 6, wherein in the judgment of ST2, if refrigerant leakage is judged, the refrigerant is judged to be in a severe leakage state and the compressor is not started, in the judgment of ST4, if refrigerant leakage is judged to be in a moderate leakage state and the compressor cannot be operated at high frequency, in the judgment of ST7, if refrigerant leakage is judged to be in a slight leakage state, and the controller displays a corresponding refrigerant leakage fault code on the display unit through the communication unit.
8. The method of claim 8, wherein the controller stops the indoor unit when a severe leakage and/or a moderate leakage occurs according to different states of the refrigerant leakage, and changes air in a space where the indoor unit is located by starting an operation program of the fan, thereby ensuring safety of indoor air quality.
The device for detecting the leakage of the air-conditioning refrigerant is characterized by comprising an outdoor unit (1) and an indoor unit (2), wherein a compressor (3), an outdoor heat exchanger (4) and an outdoor air supply fan (7) are arranged in the outdoor unit (1), outdoor coils (14) are arranged on two sides of the outdoor heat exchanger (4), the compressor (3) is communicated with the outdoor coils (14) through a four-way valve (6), the end of the compressor (3) is communicated with the four-way valve (6) through a compressor suction pipe (17), the other end of the compressor (3) is communicated with the four-way valve (6) through a compressor discharge pipe (16), an expansion valve (9) is arranged on the outdoor coils (14), an indoor heat exchanger (5) and an indoor air supply fan (8) are arranged in the indoor unit (2), indoor coils (13) are arranged on two sides of the indoor heat exchanger (5), the outdoor coils (13) and the outdoor coils (14) are communicated through a connecting valve (10), a gas collection chamber is arranged in the indoor unit (2), the indoor unit (18) is arranged at a position close to the indoor heat exchanger (5) connected with the indoor unit (13), a temperature and humidity control unit (11), and a temperature and humidity control unit (11) are arranged on the indoor unit, the indoor unit is used for controlling the indoor unit, the indoor unit is arranged, the indoor unit is used for detecting unit, the indoor unit is used for detecting unit, the indoor unit, the.
10. The air conditioner refrigerant leakage detection device according to claim 9, wherein the sensor unit includes an outdoor temperature sensor, a refrigerant pressure sensor, a refrigerant concentration sensor, and an indoor temperature and humidity sensor, the outdoor temperature sensor can detect a current outdoor environment temperature value of the outdoor unit through an environment thermometer bulb disposed on a thermometer bulb support of the outdoor unit, the refrigerant concentration sensor is used for detecting a refrigerant concentration in the collection chamber (18), the indoor temperature and humidity sensor is used for detecting a temperature and a humidity of a space where the collection chamber (18) is located, the refrigerant pressure sensor is used for detecting a pipeline pressure of the outdoor unit coil (14), the outdoor temperature sensor, the refrigerant concentration sensor, the refrigerant pressure sensor, and the indoor temperature and humidity sensor are communicated with the controller (11) through a circuit board and can feed information back to the controller (11), the controller (11) includes a collection module, a judgment module and a control module, the controller (11) receives the collected information through the collection module and judges the collected information according to a prestored relationship and a judgment instruction, the controller (11) performs communication with the control unit and performs communication with the operation and the judgment unit (12) according to the protection instruction, the judgment instruction, and the data transmission unit.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520941A (en) * | 2020-05-15 | 2020-08-11 | 北京百度网讯科技有限公司 | Refrigerant supplementing system and method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1589385A (en) * | 2001-09-19 | 2005-03-02 | 株式会社东芝 | Refrigerator-freezer, controller of refrigerator-freezer, and method for determination of leakage of refrigerant |
| JP2009064297A (en) * | 2007-09-07 | 2009-03-26 | Panasonic Corp | Vending machine |
| CN104422087A (en) * | 2013-08-26 | 2015-03-18 | 三菱电机株式会社 | Air conditioning device and refrigerant leak detection method |
| CN104833053A (en) * | 2015-04-30 | 2015-08-12 | 广东美的制冷设备有限公司 | Safety protection method and system of air conditioner |
| JP2016035355A (en) * | 2014-08-01 | 2016-03-17 | ダイキン工業株式会社 | Refrigerating device |
| CN105890116A (en) * | 2016-04-27 | 2016-08-24 | 芜湖美智空调设备有限公司 | Detection method and system for leakage of refrigerant of air conditioner |
| CN107328022A (en) * | 2017-07-05 | 2017-11-07 | Tcl德龙家用电器（中山）有限公司 | The control method and mobile air-conditioner of mobile air-conditioner |
-
2018
- 2018-07-18 CN CN201810789184.2A patent/CN110736183B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1589385A (en) * | 2001-09-19 | 2005-03-02 | 株式会社东芝 | Refrigerator-freezer, controller of refrigerator-freezer, and method for determination of leakage of refrigerant |
| JP2009064297A (en) * | 2007-09-07 | 2009-03-26 | Panasonic Corp | Vending machine |
| CN104422087A (en) * | 2013-08-26 | 2015-03-18 | 三菱电机株式会社 | Air conditioning device and refrigerant leak detection method |
| JP2016035355A (en) * | 2014-08-01 | 2016-03-17 | ダイキン工業株式会社 | Refrigerating device |
| CN104833053A (en) * | 2015-04-30 | 2015-08-12 | 广东美的制冷设备有限公司 | Safety protection method and system of air conditioner |
| CN105890116A (en) * | 2016-04-27 | 2016-08-24 | 芜湖美智空调设备有限公司 | Detection method and system for leakage of refrigerant of air conditioner |
| CN107328022A (en) * | 2017-07-05 | 2017-11-07 | Tcl德龙家用电器（中山）有限公司 | The control method and mobile air-conditioner of mobile air-conditioner |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520941A (en) * | 2020-05-15 | 2020-08-11 | 北京百度网讯科技有限公司 | Refrigerant supplementing system and method |
| CN112319173A (en) * | 2020-10-16 | 2021-02-05 | 奇瑞汽车股份有限公司 | Method and system for detecting refrigerant leakage of automobile air conditioner |
| CN112319173B (en) * | 2020-10-16 | 2022-04-29 | 奇瑞汽车股份有限公司 | Method and system for detecting refrigerant leakage of automobile air conditioner |
| CN114543258A (en) * | 2020-11-26 | 2022-05-27 | 广东美的制冷设备有限公司 | Refrigerant leakage detection method, air conditioner and computer storage medium |
| CN112503720A (en) * | 2020-12-08 | 2021-03-16 | 合肥美的暖通设备有限公司 | Refrigerant leakage protection method, air conditioning equipment and readable storage medium |
| CN113091204A (en) * | 2021-03-12 | 2021-07-09 | 青岛海尔空调器有限总公司 | Method and device for controlling air conditioner and air conditioner |
| CN113483457B (en) * | 2021-07-07 | 2022-07-19 | 珠海拓芯科技有限公司 | Air conditioner operation control method, air conditioner and readable storage medium |
| CN113483457A (en) * | 2021-07-07 | 2021-10-08 | 珠海拓芯科技有限公司 | Air conditioner operation control method, air conditioner and readable storage medium |
| CN113531772A (en) * | 2021-07-13 | 2021-10-22 | 珠海拓芯科技有限公司 | Combustible refrigerant leakage protection method and device, air conditioner and storage medium |
| WO2023040379A1 (en) * | 2021-09-17 | 2023-03-23 | 杭州先途电子有限公司 | Control device and method, and air conditioning system |
| CN114251783A (en) * | 2021-12-18 | 2022-03-29 | 珠海格力电器股份有限公司 | Refrigerant content detection method and device and air conditioner |
| CN114251783B (en) * | 2021-12-18 | 2022-11-18 | 珠海格力电器股份有限公司 | Refrigerant content detection method and device and air conditioner |
| CN114754463A (en) * | 2022-03-17 | 2022-07-15 | 青岛海尔空调电子有限公司 | Refrigerant leakage control method and device and multi-split air conditioner |
| CN115183396A (en) * | 2022-06-23 | 2022-10-14 | 青岛海尔空调电子有限公司 | Refrigerant leakage control method and system of air conditioner and air conditioner |
| CN115183396B (en) * | 2022-06-23 | 2024-02-23 | 青岛海尔空调电子有限公司 | Refrigerant leakage control method and system of air conditioner and air conditioner |
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