CN115200161A - Air conditioner refrigerant detection method, system and detection equipment - Google Patents
Air conditioner refrigerant detection method, system and detection equipment Download PDFInfo
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- CN115200161A CN115200161A CN202210719208.3A CN202210719208A CN115200161A CN 115200161 A CN115200161 A CN 115200161A CN 202210719208 A CN202210719208 A CN 202210719208A CN 115200161 A CN115200161 A CN 115200161A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 338
- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 41
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 21
- 239000011737 fluorine Substances 0.000 claims abstract description 21
- 230000007812 deficiency Effects 0.000 claims abstract description 6
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 7
- 239000002826 coolant Substances 0.000 claims 2
- 230000002950 deficient Effects 0.000 abstract description 14
- 238000005429 filling process Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000012545 processing Methods 0.000 description 24
- 238000007599 discharging Methods 0.000 description 12
- 238000012423 maintenance Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000003062 neural network model Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention provides a method, a system and a device for detecting air conditioner refrigerants. The detection method comprises the following steps: under the fluorine deficiency detection mode, obtaining values of a plurality of operating parameters of the air conditioner, wherein the plurality of operating parameters comprise actual power of a compressor; inputting values of other parameters except the actual power of the compressor in the plurality of operation parameters into a standard refrigerant state compressor power prediction model to obtain a standard refrigerant state compressor power prediction value, wherein the standard refrigerant state compressor power prediction value is a compressor power prediction value of the air conditioner operating in the current operation state under the condition that the refrigerant quantity is the rated refrigerant quantity; and judging the refrigerant quantity condition of the air conditioner according to the predicted compressor power value and the actual compressor power of the standard refrigerant state. The detection method provided by the invention can effectively detect the fluorine-deficient state of the air conditioner, avoid the leakage and waste of the refrigerant in the fluorine-deficient filling process and improve the accuracy of refrigerant filling.
Description
Technical Field
The invention belongs to the field of air conditioners, and particularly relates to a method, a system and a device for detecting a refrigerant of an air conditioner.
Background
At the present stage, the split type heat pump air conditioner in the fluorine-deficient state is filled with the refrigerant, and on one hand, the refrigerant is refilled after the refrigerant is emptied; and on the other hand, after-sales maintenance personnel replenish the refrigerant according to experience. The former method has the advantages of short maintenance time and accurate refrigerant filling amount, and has the defects of serious refrigerant waste, difficult recycling of refrigerant discharge and easy environmental pollution; the latter method has the advantages that only the refrigerant lacking in the system needs to be supplemented, no refrigerant leakage exists, the defect is that the maintenance time is long, the refrigerant filling amount can only be judged by the experience of maintenance personnel, and the accuracy of the refrigerant amount of the air conditioner is difficult to guarantee.
The present invention has been made in view of this situation.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a method, a system and a device for detecting the refrigerant of the air conditioner, wherein the method, the system and the device can effectively detect the fluorine-deficient state of the air conditioner under the condition that the air conditioner is not stopped, thereby avoiding the leakage and waste of the refrigerant in the fluorine-deficient filling process and improving the accuracy of the refrigerant filling.
In order to solve the technical problem, the invention provides a method for detecting the refrigerant quantity of an air conditioner, which comprises the following steps:
under the fluorine deficiency detection mode, obtaining values of a plurality of operating parameters of the air conditioner, wherein the plurality of operating parameters comprise actual power of a compressor;
inputting values of other parameters except the actual power of the compressor in the plurality of operation parameters into a standard refrigerant state compressor power prediction model to obtain a standard refrigerant state compressor power prediction value, wherein the standard refrigerant state compressor power prediction value is the compressor power prediction value of the air conditioner operating in the current operation state under the condition that the refrigerant quantity is the rated refrigerant quantity;
and judging the refrigerant quantity condition of the air conditioner according to the predicted compressor power value and the actual compressor power of the standard refrigerant state.
Further optionally, obtaining values of a plurality of operating parameters of the air conditioner comprises:
within a preset time length, obtaining the value of each operation parameter according to a preset time interval to obtain a plurality of values of each operation parameter;
determining the acquisition times, and summing a plurality of values of each operation parameter to obtain a sum value of each operation parameter;
and calculating the average value of each operation parameter in a preset time according to the sum value and the acquisition times of each operation parameter, and taking the average value of each operation parameter as the value of each operation parameter.
Further optionally, the value range of the first preset duration is: greater than or equal to 3min and less than or equal to 5min; the value range of the second preset duration is as follows: greater than or equal to 3s and less than or equal to 5s.
Further optionally, the plurality of operating parameters comprises: outdoor environment temperature, outdoor heat exchanger tube temperature, indoor environment temperature, indoor heat exchanger tube temperature, outdoor unit alternating current, compressor phase current and compressor actual power.
Further optionally, the calculating the values of the plurality of operating parameters by using the standard refrigerant state compressor power prediction model to obtain the standard refrigerant state compressor power prediction value includes calculating according to the following preset formula:
P' predictive compressor power ＝AT Temperature of outer tube +BT Outer loop temperature +CT Temperature of inner pipe +DT Inner ring temperature +EI AC current of outdoor unit +FI Phase current of compressor ；
Wherein, P' Predictive compressor power The predicted value of compressor power in standard refrigerant state is A, B, C, D, E and F are all coefficients, T Outer loop temperature Is the outdoor ambient temperature, T Temperature of outer tube For the pipe temperature T of the outdoor heat exchanger Inner ring temperature For indoor ambient temperature and T Temperature of inner pipe For indoor heat exchanger tube temperature, I AC current of outdoor unit Is an outdoor machine AC current, I Phase current of compressor Compressor phase currents.
Further optionally, the determining the refrigerant quantity condition of the air conditioner according to the predicted compressor power value and the actual compressor power value in the standard refrigerant state includes:
when the actual power value of the compressor is smaller than the predicted value of the compressor power in the standard refrigerant state, judging that the refrigerant quantity is insufficient;
when the actual power value of the compressor is equal to the predicted value of the compressor power in the standard refrigerant state, judging that the refrigerant quantity is appropriate;
and when the actual power value of the compressor is greater than the predicted power value of the compressor in the standard refrigerant state, judging that the refrigerant quantity is excessive.
Further optionally, the detection method further includes:
when the refrigerant quantity is judged to be insufficient, monitoring a first difference value between the actual power value of the compressor and the predicted power value of the compressor in the standard refrigerant state;
and controlling the opening and closing of a refrigerant filling valve according to the first difference, and controlling the filling rate and the filling duration of the refrigerant under the condition that the refrigerant filling valve is opened.
Further optionally, controlling a filling rate and a filling duration of the refrigerant to be filled into the air conditioner according to the first difference, and controlling an on/off state of a refrigerant filling valve, includes:
calculating a first ratio of the first difference value to a predicted power value of the compressor in the standard refrigerant state;
when the first ratio is smaller than or equal to a first threshold value, the refrigerant filling valve is opened, the filling rate is a first preset rate, and the filling duration is a first preset duration;
when the first ratio is greater than or equal to a second threshold and less than a third threshold, the refrigerant filling valve is opened, the filling rate is a second preset rate, and the filling duration is a second preset duration;
when the first ratio is larger than or equal to the third threshold, the refrigerant filling valve is closed, and the refrigerant is stopped from being filled into the air conditioner;
wherein the first threshold is less than the second threshold,
the value range of the first preset rate is as follows: greater than or equal to 15g/min and less than or equal to 30g/min,
the value range of the second preset rate is as follows: greater than or equal to 5g/min and less than or equal to 15g/min. Further optionally, the detection method further includes calculating the refrigerant charge amount according to the following calculation formula:
ΣG filling amount ＝V 1 ·T 1 +V 2 ·T 2 ；
Wherein, V 1 Is a first predetermined rate, V 2 Is a second predetermined rate, T 1 Is a first preset duration, T 2 Is a second preset duration.
Further optionally, the detection method further includes:
when the refrigerant quantity is judged to be excessive, monitoring a second difference value between the actual power value of the compressor and the predicted power value of the standard refrigerant state compressor;
and controlling the opening and closing of the refrigerant pressure release valve according to the second difference, and controlling the discharge rate and the discharge duration of the refrigerant under the condition that the refrigerant pressure release valve is opened.
Further optionally, controlling the opening and closing of the refrigerant relief valve according to the second difference, and controlling the discharge rate and the discharge duration of the refrigerant under the condition that the refrigerant relief valve is opened, includes:
calculating a second ratio of the second difference value to a power predicted value of the compressor in the standard refrigerant state;
when the second ratio is greater than or equal to a fourth threshold, the refrigerant pressure relief valve is opened, the discharge rate is a third preset rate, and the discharge duration is a third preset duration;
when the second ratio is greater than or equal to the fifth threshold and smaller than the fourth threshold, the refrigerant relief valve is opened, the discharge rate is a fourth preset rate, and the discharge duration is a fourth preset duration;
when the second ratio is smaller than or equal to the sixth threshold, the refrigerant relief valve is closed, and the refrigerant is stopped being discharged from the air conditioner;
wherein the fifth threshold is greater than the sixth threshold,
the value range of the third preset rate is as follows: greater than or equal to 7g/min and less than or equal to 12g/min,
the value range of the fourth preset rate is as follows: greater than 0g/min and less than or equal to 10g/min.
Further optionally, the detection method further includes calculating the discharge amount of the refrigerant according to the following calculation formula:
∑G volume of drawing and discharging ＝V 3 ·T 3 +V 4 ·T 4 ；
Wherein, V 3 Is a third predetermined rate, V 4 Is the fourth predetermined rate, T 1 For a third predetermined duration, T 2 A fourth preset duration.
The invention also provides a system for detecting the refrigerant quantity of the air conditioner, which comprises:
the data acquisition module is used for acquiring values of a plurality of operating parameters of the air conditioner in a fluorine-lacking detection mode, wherein the operating parameters comprise actual power of a compressor;
the compressor power prediction module is used for inputting values of other parameters except the actual compressor power in the plurality of operation parameters into a standard refrigerant state compressor power prediction model to obtain a standard refrigerant state compressor power prediction value, wherein the standard refrigerant state compressor power prediction value is the compressor power prediction value of the air conditioner which operates in the current operation state when the refrigerant quantity is the rated refrigerant quantity;
and the refrigerant filling control module is used for judging the refrigerant quantity condition of the air conditioner according to the predicted power value of the compressor in the standard refrigerant state and the actual power value of the compressor.
The invention also provides a system for detecting the refrigerant quantity of the air conditioner, which comprises one or more processors and a non-transitory computer readable storage medium storing program instructions, wherein when the one or more processors execute the program instructions, the one or more processors are used for realizing the method of any one of the technical schemes.
The invention also provides a detection device which adopts the method of any one of the above technical schemes or a system comprising any one of the above technical schemes.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects: under the condition that the air conditioner is not stopped, the compressor power of the air conditioner in the standard refrigerant state can be effectively predicted by detecting a plurality of operating parameters of the air conditioner in the fluorine-deficient detection mode and inputting the operating parameters into the compressor power prediction model in the standard refrigerant state. By comparing the predicted compressor power value and the actual compressor power value in the standard refrigerant state, the refrigerant quantity condition can be effectively judged. By monitoring the change condition of the difference value between the predicted compressor power value and the actual compressor power value in the standard refrigerant state, the filling/discharging rate and the filling/discharging duration of the refrigerant filling/discharging process can be controlled, so that the leakage waste of the refrigerant in the fluorine-lacking filling process can be avoided, and the refrigerant filling accuracy is improved.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention to the proper form disclosed herein. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a flow chart illustrating a method for detecting the amount of refrigerant in an air conditioner according to an embodiment of the present invention.
Fig. 2 is a flow chart illustrating a method for detecting the amount of refrigerant in an air conditioner according to an embodiment of the present invention.
Fig. 3 is a flow chart illustrating a method for detecting a refrigerant quantity of an air conditioner according to an embodiment of the present invention.
Fig. 4 is a flowchart illustrating a method for detecting a refrigerant quantity of an air conditioner according to an embodiment of the invention.
Fig. 5 is a flowchart illustrating a method for detecting a refrigerant quantity of an air conditioner according to an embodiment of the present invention.
Fig. 6 is a schematic block diagram of a refrigerant quantity detection system of an air conditioner according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of verification of a standard refrigerant state compressor power prediction model according to an embodiment of the present invention.
Fig. 8 is a control flowchart of a method for detecting a refrigerant quantity of an air conditioner according to an embodiment of the present invention.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
To further illustrate the technical solution of the present invention, the fluorine deficiency detection mode in the related examples will be explained first. Under the condition that the air conditioner does not stop, a user sets the operation parameters of the air conditioner through a remote controller or other control terminals (such as a mobile phone), wherein the operation parameters comprise the frequency of a compressor, the windshield of an inner fan, the windshield of an outer fan, the operation mode and the like, so that the air conditioner operates in a fluorine-deficient detection mode.
Specifically, the frequency of the air conditioner compressor is set through a remote controller, so that the compressor runs according to a target frequency value, the range of the target frequency value is 10 Hz-90 Hz, and the target frequency value is preferably one of 60Hz, 45Hz and 30 Hz;
setting an air conditioner operation mode through a remote controller, wherein the operation mode preferably selects a refrigeration mode and a heating mode;
setting the wind shield of an inner fan of the air conditioner through a remote controller, wherein the wind shield preferably selects a super-strong wind shield and a high wind shield in a plurality of preset wind shields;
the air damper of the air conditioner external fan is set through the remote controller, and generally, the air damper does not need to be set, and the air damper is preferably in a free mode.
Preferably, the air conditioner according to the related embodiment of the present invention is a split type heat pump air conditioner.
The method for predicting the refrigerant quantity of the air conditioner according to the embodiment of the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a flow chart illustrating a method for detecting the amount of refrigerant in an air conditioner according to an embodiment of the present invention. Referring to fig. 1, the detection method includes:
s1, when an air conditioner operates in a fluorine-lack detection mode, obtaining values of a plurality of operating parameters of the air conditioner, wherein the plurality of operating parameters comprise actual power of a compressor;
under the condition that the air conditioner does not stop, a detector sets the operation parameters of the air conditioner through a remote controller, wherein the operation parameters comprise the frequency of a compressor, the windshield of an inner fan, the windshield of an outer fan, the operation mode and the like, so that the air conditioner operates in a fluorine-lacking detection mode. Collecting T in air conditioner operation parameters Temperature of outer tube 、T Outer ring temperature 、T Temperature of inner pipe 、T Inner ring temperature 、I AC current of outdoor unit 、I Phase current of compressor And P Actual power of compressor 。
S2, inputting values of other parameters except the actual power of the compressor in the plurality of operation parameters into a standard refrigerant state compressor power prediction model to obtain a standard refrigerant state compressor power prediction value, wherein the standard refrigerant state compressor power prediction value is the compressor power prediction value of the air conditioner which operates in the current operation state under the condition that the refrigerant quantity is the rated refrigerant quantity;
because the compressor power of the air conditioner in the standard refrigerant state can only be obtained under the experimental working condition, the embodiment of the invention provides a compressor power prediction model in the standard refrigerant state. By inputting the values of a plurality of operating parameters of the air conditioner under the fluorine-deficient detection model into the standard refrigerant state compressor power prediction model, the predicted value of the compressor power of the air conditioner running in the current operating state under the condition that the refrigerant quantity is the rated refrigerant quantity (namely under the standard refrigerant state) can be effectively predicted. Referring to fig. 7, an error between a standard refrigerant state compressor power predicted value obtained by calculation of the standard refrigerant state compressor power prediction model according to the embodiment of the present invention and a standard compressor power obtained under an experimental condition can be guaranteed to be within 10%, so that the standard compressor power can be replaced by the standard refrigerant state compressor power predicted value to a certain extent.
The standard refrigerant state compressor power prediction model may be understood as a mapping relation/functional relation between an input parameter and an output parameter, such as a neural network model and an equation. In particular, T is preferred Temperature of outer tube 、T Outer ring temperature 、T Temperature of inner pipe 、T Inner ring temperature 、I AC current of outdoor unit And I Phase current of compressor The method comprises the steps of predicting a standard refrigerant state compressor power predicted value P 'of the air conditioner under the current working condition when the refrigerant charge quantity is a rated refrigerant' Predictive compressor power ；P′ Predictive compressor power Indicating that when the air conditioner is operated in a normal refrigerant state,the system parameter is T sent by the current data processing module Temperature of outer tube 、T Outer loop temperature 、T Temperature of inner pipe 、T Inner ring temperature 、I AC current of outdoor unit And I Phase current of compressor When is, P Standard state compressor power The predicted value of (2);
the standard refrigerant state compressor power prediction equation, namely the standard refrigerant state compressor power prediction model, is as follows:
P' predictive compressor power ＝AT Temperature of outer tube +BT Outer ring temperature +CT Temperature of inner pipe +DT Inner ring temperature +EI AC current of outdoor unit +FI Phase current of compressor
The processed T is processed by the data processing module Temperature of outer tube 、T Outer ring temperature 、T Temperature of inner pipe 、T Inner ring temperature 、I AC current of outdoor unit And I Phase current of compressor Sending the power prediction model to a standard refrigerant state compressor, and calculating by the program according to the equation to obtain P' Predictive compressor power A value;
and S3, judging the refrigerant quantity condition of the air conditioner according to the predicted compressor power value and the actual compressor power value of the standard refrigerant state.
The current refrigerant quantity condition of the air conditioner can be effectively judged by comparing the predicted compressor power value and the actual compressor power value of the standard refrigerant state, such as whether the refrigerant quantity is proper, insufficient or excessive. The method is suitable for different refrigerant quantity detection scenes, including fluorine deficiency detection, refrigerant quantity detection in the refrigerant filling process and refrigerant quantity detection in the refrigerant discharging process.
The obtaining of the actual power value of the compressor can also be incorporated into the step S1, and the actual power of the compressor is collected as one of the operation parameters. However, it should be noted that the actual power value of the compressor is not used as an input parameter of the standard refrigerant state compressor power prediction model according to the embodiment of the present invention. After the data processing module calculates the average value of the actual power values of the plurality of compressors collected within the preset time, the average value is used as the actual power of the compressor to participate in the judgment of the refrigerant quantity condition.
Further optionally, with reference to the flowchart of fig. 2, step S1 includes steps S11 to S13, where:
s11, within a preset time length, obtaining the value of each operation parameter according to a preset time interval to obtain a plurality of values of each operation parameter;
s12, determining the acquisition times, and summing a plurality of values of each operation parameter to obtain a sum value of each operation parameter;
and S13, calculating the average value of each operation parameter in a preset time length according to the sum value and the acquisition times of each operation parameter, and taking the average value of each operation parameter as the value of each operation parameter.
In this embodiment, the predicted value of the power of the standard refrigerant state compressor is obtained by obtaining the average value of each of the plurality of operating parameters within a period of time and using the average value as the input parameter of the standard refrigerant state compressor power prediction model, and calculating the average value of the parameters by using the standard refrigerant state compressor power prediction model, so that the situation of large fluctuation amount of the operating parameters can be shielded, and the prediction accuracy can be ensured.
Specifically, the acquired operation parameter T Temperature of outer tube 、T Outer ring temperature 、T Temperature of inner pipe 、T Inner ring temperature 、I AC current of outdoor unit 、I Phase current of compressor And P Actual power of compressor Will be given by T 1 The time intervals are stored in a data processing module, T 1 Preferably 5s, co-collecting T 2 Duration, T 2 Preferably 5min;
T temperature of outer tube Stored in the data processing module as:
T outer ring temperature Stored in the data processing module as:
T inner pipe temperature Stored in the data processing module as:
T inner ring temperature Stored in the data processing module as:
I AC current of outdoor unit Stored in the data processing module as:
I phase current of compressor Stored in the data processing module as:
P actual power of compressor Stored in the data processing module as:
wherein, n is the number of acquisition times,
further optionally, the value range of the first preset duration is: greater than or equal to 3min and less than or equal to 5min; the value range of the second preset duration is as follows: greater than or equal to 3s and less than or equal to 5s.
Specifically, the first preset time period may be 3min, 4min, 5min, and the second preset time period may be 3s, 4s, 5s, but is not limited thereto.
Further optionally, the plurality of operating parameters comprises: outdoor environment temperature, outdoor heat exchanger tube temperature, indoor environment temperature, indoor heat exchanger tube temperature, outdoor unit alternating current, compressor phase current and compressor actual power.
The actual compressor power is not used as an input parameter of a compressor power model, but is compared with a predicted compressor power value in a standard refrigerant state when the refrigerant quantity condition is judged, so that the refrigerant quantity condition is judged.
Further optionally, the standard refrigerant state compressor power prediction model adopts the following formula:
P' predictive compressor power ＝AT Outer tube temperature +BT Outer ring temperature +CT Temperature of inner pipe +DT Inner ring temperature +EI AC current of outdoor unit +FI Compressor phase current ；
Wherein, P' Predictive compressor power The predicted value of compressor power in standard refrigerant state is A, B, C, D, E and F are all coefficients, T Outer ring temperature Is the outdoor ambient temperature, T Temperature of outer tube For the tube temperature T of the outdoor heat exchanger Inner ring temperature For indoor ambient temperature and T Temperature of inner pipe For indoor heat exchanger tube temperature, I AC current of outdoor unit For the outdoor unit AC, I Phase current of compressor Compressor phase currents.
Further optionally, with reference to the flowchart of fig. 3, step S3 includes steps S31 to S34, where:
s31, comparing the predicted power value of the compressor in the standard refrigerant state with the actual power value of the compressor;
s32, when the actual power value of the compressor is smaller than the predicted power value of the compressor in the standard refrigerant state, judging that the refrigerant quantity is insufficient;
s33, when the actual power value of the compressor is equal to the predicted power value of the compressor in the standard refrigerant state, judging that the refrigerant quantity is appropriate;
and S34, when the actual power value of the compressor is greater than the predicted power value of the compressor in the standard refrigerant state, judging that the refrigerant quantity is excessive.
In this embodiment, based on the comparison between the preset compressor power and the actual compressor power, the refrigerant quantity condition of the air conditioner can be effectively determined, and a method for filling the refrigerant of the air conditioner in a fluorine-deficient state is provided, so that leakage and waste of the refrigerant in the fluorine-deficient filling process can be avoided, and the refrigerant filling accuracy is improved.
Further optionally, when the refrigerant quantity is judged to be insufficient, the refrigerant quantity is prompted to the user; when the refrigerant amount is judged to be excessive, the refrigerant amount excess is presented to the user.
Further optionally, with reference to the flowchart of fig. 3, when it is determined that the refrigerant quantity is insufficient, the detection method further includes steps S5 to S6, where:
s4, monitoring a first difference value between the actual power value of the compressor and the predicted power value of the standard refrigerant state compressor;
and S5, controlling the opening and closing of the refrigerant filling valve according to the first difference, and controlling the filling rate and the filling duration of the refrigerant under the condition that the refrigerant filling valve is opened.
When the refrigerant quantity is judged to be insufficient, whether the air conditioner is in a fluorine-deficient state can be judged by calculating a first difference value between the actual power value of the compressor and the predicted power value of the compressor in the standard refrigerant state, and refrigerant filling can be carried out if the air conditioner is in the fluorine-deficient state. In the refrigerant filling process, a first difference value between the actual power value of the compressor and the predicted power value of the compressor in the standard refrigerant state can be continuously monitored, so that the filling rate and the filling duration of the refrigerant are controlled, and the opening and closing of the refrigerant filling valve are controlled, so that the refrigerant filling of the air conditioner is completed.
Further optionally, with reference to the flowchart of fig. 4, step S5 includes steps S51 to S54, where:
s51, calculating a first ratio of the first difference value to a predicted power value of the compressor in the standard refrigerant state;
s52, when the first ratio is smaller than or equal to a first threshold value, the refrigerant filling valve is opened, the filling rate is a first preset rate, and the filling duration is a first preset duration;
s53, when the first ratio is greater than or equal to a second threshold and smaller than a third threshold, the refrigerant charging valve is opened, the charging rate is a second preset rate, and the charging duration is a second preset duration;
s54, when the first ratio is larger than or equal to the third threshold value, closing the refrigerant filling valve, and stopping filling the refrigerant into the air conditioner;
wherein the first threshold is less than the second threshold.
In one embodiment, the first threshold is-20%, the second threshold is-10%, and the third threshold is-5%.
Further optionally, a value range of the first preset rate is: more than or equal to 15g/min and less than or equal to 30g/min, and the value range of the second preset speed is as follows: greater than or equal to 5g/min and less than or equal to 15g/min.
Specifically, the first preset rate can be 15g/min, 20g/min, 25g/min, 30g/min, and preferably the first preset rate is 20g/min. The second predetermined rate may be 5g/min, 10g/min, 15g/min, preferably the second predetermined rate is 10g/min.
It can be understood that, after the first ratio between the first difference and the predicted power value of the standard refrigerant state compressor is monitored once and refrigerant filling is executed once according to the interval range where the first ratio is located, the system monitors the first ratio again and judges the interval range where the newly monitored first ratio is located so as to adjust the refrigerant filling rate and the refrigerant filling time, so that the fluorine-deficient state of the air conditioner can be effectively detected, leakage and waste of refrigerants in the fluorine-deficient filling process are avoided, and the accuracy of refrigerant filling is improved.
Specifically, when (P) Actual power value of compressor -P′ Predictive compressor power )/P′ Predictive compressor power When the refrigerant is less than or equal to-20 percent, the refrigerant filling valve is opened according to V 1 Filling refrigerant into air conditioner at g/min rate, V 1 Has a value range of 15-30, preferably 20, and the accumulated charging time is recorded as T 1 ；
When (P) Actual power value of compressor -P′ Predictive compressor power )/P′ Predictive compressor power When the refrigerant is more than or equal to 10 percent, the refrigerant filling valve is opened according to V 2 Filling refrigerant into air conditioner at g/min rate, V 2 Has a value range of 5-15, preferably 10, and the accumulated charging time is recorded as T 2 ；
When (P) Actual power value of compressor -P′ Predictive compressor power )/P′ Predictive compressor power When the refrigerant charging valve is closed and the refrigerant charging to the air conditioner is stopped when the refrigerant charging valve is larger than or equal to-5 percent. Further optionally, the detection method further includes calculating the refrigerant charge amount according to the following calculation formula:
∑G filling amount ＝V 1 ·T 1 +V 2 ·T 2 ；
Wherein, V 1 Is a first predetermined rate, V 2 Is a second predetermined rate, T 1 Is a first preset duration, T 2 Is a second preset duration.
Further optionally, with reference to the schematic flow chart of fig. 2, when the refrigerant amount is judged to be excessive, the detection method further includes steps S6 to S7, where: the detection method further comprises the following steps:
s6, monitoring a second difference value between the actual power value of the compressor and the predicted power value of the compressor in the standard refrigerant state;
and S7, controlling the opening and closing of the refrigerant pressure release valve according to the second difference value, and controlling the discharge rate and the discharge duration of the refrigerant under the condition that the refrigerant pressure release valve is opened.
When the refrigerant quantity is excessive, whether the excessive refrigerant in the air conditioner needs to be discharged or not can be judged according to a second difference value between the actual power value of the compressor and the predicted power value of the compressor in the standard refrigerant state. In the process of discharging the refrigerant, two difference values between the actual power value of the compressor and the predicted power value of the compressor in the standard refrigerant state can be monitored in real time, so that the discharge rate and the discharge duration of the refrigerant are controlled, and the opening and closing of the refrigerant pressure release valve are controlled, so that the excessive refrigerant is discharged from the air conditioner.
Further optionally, with reference to the flowchart of fig. 5, step S7 includes steps S71 to S74, where:
s71, calculating a second ratio of the second difference value to the predicted power value of the compressor in the standard refrigerant state;
s72, when the second ratio is larger than or equal to the fourth threshold, the refrigerant relief valve is opened, the discharge rate is a third preset rate, and the discharge duration is a third preset duration;
s73, when the second ratio is greater than or equal to the fifth threshold and smaller than the fourth threshold, the refrigerant relief valve is opened, the discharge rate is a fourth preset rate, and the discharge duration is a fourth preset duration;
s74, when the second ratio is smaller than or equal to the sixth threshold, closing the refrigerant relief valve, and stopping discharging the refrigerant from the air conditioner;
wherein the fifth threshold is greater than the sixth threshold.
In one embodiment, the fourth threshold is 20%, the fifth threshold is 10%, and the sixth threshold is 5%.
Further optionally, a value range of the third preset rate is: the fourth preset rate is greater than or equal to 7g/min and less than or equal to 12g/min, and the value range of the fourth preset rate is as follows: greater than 0g/min and less than or equal to 10g/min.
In particular, the third preset rate may be 7g/min, 8g/min, 10g/min, 12g/min, preferably the third preset rate is 10g/min. The fourth predetermined rate may be 2g/min, 4g/min, 5g/min, 7g/min, 10g/min, preferably the fourth predetermined rate is 5g/min.
Further optionally, the detection method further includes calculating the discharge amount of the refrigerant according to the following calculation formula:
ΣG volume of drawing and releasing ＝V 3 ·T 3 +V 4 ·T 4 ；
Wherein, V 3 For a third predetermined rate, V 4 Is the fourth predetermined rate, T 1 For a third predetermined duration, T 2 A fourth preset duration.
Specifically, when (P) Actual power of compressor -P′ Predictive compressor power )/P′ Predictive compressor power When the pressure is more than or equal to 20 percent, the refrigerant relief valve is opened according to V 3 Discharging refrigerant V from air conditioner to refrigerant collecting device at g/min rate 3 The value range of (1) is 7-12, the preferred value is 10, and the accumulated pressure relief time is recorded as T 3 ；
When (P) Actual power of compressor -P′ Predictive compressor power )/P′ Predictive compressor power When the pressure is more than or equal to 10 percent, the refrigerant relief valve is opened according to V 4 Discharging refrigerant V from air conditioner to refrigerant collecting device at g/min rate 4 The value range of (1) is 0-10, the preferred value is 5, and the accumulated pressure relief time is recorded as T 4 ；
When (P) Actual power of compressor -P′ Predictive compressor power )/P′ Predictive compressor power And when the pressure is less than or equal to 5%, the refrigerant pressure relief valve is closed, and the refrigerant is stopped being discharged from the air conditioner.
Fig. 6 is a schematic block diagram of an air conditioner refrigerant quantity detection system 600 according to an embodiment of the present invention. Referring to fig. 6, the detection system 600 includes:
a data obtaining module 602, configured to obtain values of a plurality of operating parameters of the air conditioner when the air conditioner is operating in a fluorine deficiency detection mode, where the plurality of operating parameters include an actual power of a compressor;
the compressor power prediction module 604 is configured to input values of other parameters, except for actual power of the compressor, of the multiple operation parameters into a standard refrigerant state compressor power prediction model of a standard refrigerant state compressor power prediction model to obtain a standard refrigerant state compressor power prediction value, where the standard refrigerant state compressor power prediction value is a compressor power prediction value of an air conditioner operating in a current operation state with refrigerant quantity as a rated refrigerant quantity;
and a refrigerant charge control module 606, configured to determine a refrigerant quantity condition of the air conditioner according to the predicted compressor power value and the actual compressor power value in the standard refrigerant state.
Further optionally, the data obtaining module 602 is specifically configured to obtain the obtained operating parameter T Temperature of outer tube 、T Outer ring temperature 、T Temperature of inner pipe 、T Inner ring temperature 、I AC current of outdoor unit 、I Phase current of compressor And P Actual power of compressor Will be represented by T 1 The time interval is stored in the data processing module 608, T 1 Preferably 5s, co-collecting T 2 Duration, T 2 Preferably for 5min.
Further optionally, referring to fig. 6, the detection system 600 further comprises: a data processing module 608.
A data obtaining module 602, configured to obtain the operating parameter T Temperature of outer tube 、T Outer loop temperature 、T Temperature of inner pipe 、T Inner ring temperature 、I AC current of outdoor unit 、I Phase current of compressor And P Actual power of compressor Will be represented by T 1 The time interval is stored in the data processing module 608, T 1 Preferably 5s, co-collecting T 2 Duration, T 2 Preferably 5min;
T temperature of outer tube Stored in the data processing module 608 are:
T outer ring temperature Stored in the data processing module 608 are:
T temperature of inner pipe Stored in the data processing module 608 are:
T inner ring temperature Stored in the data processing module 608 are:
I AC current of outdoor unit Stored in the data processing module 608 are:
I phase current of compressor Stored in the data processing module 608 are:
P actual power of compressor Stored in the data processing module 608 are:
wherein n is the number of acquisition times,
the compressor power prediction module 604 calculates values of a plurality of operating parameters by using a standard refrigerant state compressor power prediction model to obtain a standard refrigerant state compressor power prediction value, and specifically adopts the following standard refrigerant state compressor power prediction equation:
P' predictive compressor power ＝AT Temperature of outer tube +BT Outer loop temperature +CT Temperature of inner pipe +DT Inner ring temperature +EI AC current of outdoor unit +FI Compressor phase current ；
Processed T is processed by the data processing module 608 Outer tube temperature 、T Outer loop temperature 、T Inner pipe temperature 、T Inner ring temperature 、I AC current of outdoor unit And I Phase current of compressor Sending the power prediction model to a standard refrigerant state compressor, and calculating by the program according to the equation to obtain P' Predicting compressor power value ；
Calculated to give P' Predictive compressor power The system parameter is T sent by the current data processing module 608 when the air conditioner is operating in a standard refrigerant state Temperature of outer tube 、T Outer ring temperature 、T Temperature of inner pipe 、T Inner ring temperature 、I AC current of outdoor unit And I Phase current of compressor When P is present Standard state compressor power The predicted value of (2).
P 'calculated by the refrigerant charging control module 606 according to the standard refrigerant state compressor power prediction model' Predictive compressor power And P Actual power of compressor Comparing to control the refrigerant charging valve and the refrigerant decompression valve;
said P is Actual power of compressor ＜P′ Predictive compressor power When the temperature is low, the shortage of the refrigerant is prompted;
the P is Actual power of compressor ＝P′ Predictive compressor power When the temperature is higher than the preset temperature, the appropriate amount of the refrigerant is prompted;
the P is Actual power of compressor ＞P′ Predictive compressor power And when the temperature is higher than the preset temperature, the excessive refrigerant quantity is prompted.
Further optionally, referring to fig. 8, the refrigerant charging control module 606 is configured to control a refrigerant charging valve and a refrigerant relief valve, where the refrigerant charging valve completes charging of the refrigerant of the air conditioner by opening and closing, and the refrigerant relief valve completes discharging of the refrigerant of the air conditioner by opening and closing.
Further optionally, the refrigerant charging control module 606 is configured to detect a charging amount of the refrigerant and a charging control strategy during the charging of the refrigerant. Specifically, the control strategy is:
when (P) Actual power value of compressor -P′ Predictive compressor power )/P′ Predictive compressor power When the refrigerant is less than or equal to-20 percent, the refrigerant filling valve is opened according to V 1 Filling air conditioner with refrigerant at g/min rate, V 1 Has a value range of 15-30, preferably 20, and the accumulated charging time is recorded as T 1 ；
When (P) Actual power of compressor -P′ Predictive compressor power )/P′ Predictive compressor power When the refrigerant is larger than or equal to 10 percent, the refrigerant filling valve is opened according to V 2 Filling air conditioner with refrigerant at g/min rate, V 2 The value range of (1) is 5-15, the preferred value is 10, and the accumulated filling time is recorded as T 2 ；
When (P) Actual power of compressor -P′ Predictive compressor power )/P′ Predictive compressor power When the refrigerant is larger than or equal to-5%, the refrigerant filling valve is closed, and the refrigerant is stopped from being filled into the air conditioner;
when (P) Actual power of compressor -P′ Predictive compressor power )/P′ Predictive compressor power When the pressure is more than or equal to 20 percent, the refrigerant relief valve is opened according to V 3 Discharging refrigerant V from air conditioner to refrigerant collecting device at g/min rate 3 The value range of (1) is 7-12, the preferred value is 10, and the accumulated pressure relief time is recorded as T 3 ；
When (P) Actual power of compressor -P′ Predictive compressor power )/P′ Predictive compressor power When the pressure is more than or equal to 10 percent, the refrigerant relief valve is opened according to V 4 Discharging refrigerant V from air conditioner to refrigerant collecting device at g/min rate 4 The value range of (1) is 0-10, the preferred value is 5, and the accumulated pressure relief time is recorded as T 4 ；
When (P) Compressor devicePower of the boundary -P′ Predictive compressor power )/P′ Predictive compressor power And when the pressure is less than or equal to 5%, the refrigerant pressure relief valve is closed, and the refrigerant is stopped being discharged from the air conditioner.
Further, the detection of the refrigerant filling amount is as follows:
∑G filling amount ＝V 1 ·T 1 +V 2 ·T 2 ；
Further, the amount of refrigerant drawn by the refrigerant relief valve may be detected as follows:
∑G volume of drawing and releasing ＝V 3 ·T 3 +V 4 ·T 4 。
The present invention also provides a system for detecting a refrigerant quantity of an air conditioner, which includes one or more processors and a non-transitory computer-readable storage medium storing program instructions, wherein when the program instructions are executed by the one or more processors, the one or more processors are configured to implement the method of any one of the preceding paragraphs.
The present embodiment also provides a detection apparatus that employs the method of any of the preceding claims, or a system comprising any of the preceding claims.
Any one method or system of the embodiment relates to a data acquisition module, a data processing module, a compressor power prediction module (a standard refrigerant state compressor power prediction model) and a refrigerant charging control module, wherein the functional modules are integrated in a detector for detection personnel to use; and the detector is connected with the wiring terminal of the air conditioner external unit by a detector, and then the air conditioner is started to operate.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (15)
1. A method for detecting the amount of refrigerant in an air conditioner is characterized by comprising the following steps:
when the air conditioner runs in a fluorine lack detection mode, obtaining values of a plurality of running parameters of the air conditioner, wherein the running parameters comprise actual power of a compressor;
inputting values of parameters except the actual compressor power in the plurality of operation parameters into a standard refrigerant state compressor power prediction model to obtain a standard refrigerant state compressor power prediction value, wherein the standard refrigerant state compressor power prediction value is the compressor power prediction value of the air conditioner which operates in the current operation state under the condition that the refrigerant quantity is the rated refrigerant quantity;
and judging the refrigerant quantity condition of the air conditioner according to the standard refrigerant state compressor power predicted value and the compressor actual power value.
2. The method as claimed in claim 1, wherein the obtaining values of a plurality of operating parameters of the air conditioner comprises:
within a preset time length, acquiring the value of each operation parameter according to a preset time interval to obtain a plurality of values of each operation parameter;
determining the acquisition times, and summing a plurality of values of each operation parameter to obtain a sum value of each operation parameter;
and calculating the average value of each operation parameter in the preset time length according to the sum value of each operation parameter and the acquisition times, and taking the average value of each operation parameter as the value of each operation parameter.
3. The method for detecting a cooling medium amount of an air conditioner according to claim 2,
the value range of the preset duration is as follows: greater than or equal to 3min and less than or equal to 5min;
the value range of the preset time interval is as follows: greater than or equal to 3s and less than or equal to 5s.
4. The method for detecting a cooling medium amount of an air conditioner according to claim 1,
the plurality of operating parameters includes: the outdoor temperature, the outdoor heat exchanger tube temperature, the indoor heat exchanger tube temperature, the outdoor unit alternating current, the compressor phase current and the compressor actual power.
5. The method for detecting the refrigerant quantity of the air conditioner as claimed in claim 4, wherein the standard refrigerant state compressor power prediction model adopts the following formula:
P' predictive compressor power ＝AT Temperature of outer tube +BT Outer loop temperature +CT Temperature of inner pipe +DT Inner ring temperature +EI AC current of outdoor unit +FI Phase current of compressor ；
Wherein, P' Predictive compressor power A, B, C, D, E and F are all coefficients, T is the predicted value of the compressor power in the standard refrigerant state Outer ring temperature Is the outdoor ambient temperature, T Temperature of outer tube For the tube temperature T of the outdoor heat exchanger Inner ring temperature For the indoor ambient temperature and T Temperature of inner pipe For the pipe temperature I of the indoor heat exchanger AC current of outdoor unit For the outdoor unit AC current, I Phase current of compressor The compressor phase currents are.
6. The method for detecting the amount of refrigerant in an air conditioner according to any one of claims 1 to 5, wherein the step of determining the amount of refrigerant in the air conditioner based on the predicted compressor power value and the actual compressor power in the standard refrigerant state comprises:
when the actual power value of the compressor is smaller than the predicted power value of the compressor in the standard refrigerant state, judging that the refrigerant quantity is insufficient;
when the actual power value of the compressor is equal to the predicted power value of the compressor in the standard refrigerant state, judging that the refrigerant quantity is appropriate;
and when the actual power value of the compressor is greater than the predicted power value of the compressor in the standard refrigerant state, judging that the refrigerant quantity is excessive.
7. The method for detecting the refrigerant quantity of an air conditioner as claimed in claim 6, further comprising:
when the refrigerant quantity is judged to be insufficient, monitoring a first difference value between the actual power value of the compressor and the predicted power value of the compressor in the standard refrigerant state;
and controlling the opening and closing of a refrigerant filling valve according to the first difference, and controlling the filling rate and the filling duration of the refrigerant under the condition that the refrigerant filling valve is opened.
8. The method for detecting the refrigerant quantity of an air conditioner according to claim 7, wherein the controlling of the opening and closing of the refrigerant charging valve according to the first difference, and controlling the charging rate and the charging duration of the refrigerant when the refrigerant charging valve is opened, comprises:
calculating a first ratio of the first difference value to a power predicted value of the standard refrigerant state compressor;
when the first ratio is smaller than or equal to a first threshold value, the refrigerant filling valve is opened, the filling rate is a first preset rate, and the filling duration is a first preset duration;
when the first ratio is greater than or equal to a second threshold and smaller than a third threshold, the refrigerant filling valve is opened, the filling rate is a second preset rate, and the filling duration is a second preset duration;
when the first ratio is larger than or equal to the third threshold, the refrigerant filling valve is closed, and the refrigerant filling of the air conditioner is stopped;
wherein the first threshold is less than the second threshold,
the value range of the first preset rate is as follows: greater than or equal to 15g/min and less than or equal to 30g/min,
the value range of the second preset rate is as follows: greater than or equal to 5g/min and less than or equal to 15g/min.
9. The method as claimed in claim 8, further comprising calculating the refrigerant charge according to the following calculation formula:
∑G amount of filling ＝V 1 ·T 1 +V 2 ·T 2 ；
Wherein, V 1 Is the first predetermined rate, V 2 For the second predetermined rate, T 1 For the first predetermined duration, T 2 And the second preset time length.
10. The method for detecting the refrigerant quantity of an air conditioner as claimed in claim 6, further comprising:
when the refrigerant quantity is judged to be excessive, monitoring a second difference value between the actual power value of the compressor and the predicted power value of the compressor in the standard refrigerant state;
and controlling the opening and closing of the refrigerant pressure release valve according to the second difference, and controlling the discharge rate and the discharge duration of the refrigerant under the condition that the refrigerant pressure release valve is opened.
11. The method for detecting the refrigerant quantity of the air conditioner according to claim 10, wherein the controlling of the opening and closing of the refrigerant relief valve according to the second difference value and the controlling of the discharge rate and the discharge duration of the refrigerant under the condition that the refrigerant relief valve is opened comprise:
calculating a second ratio of the second difference value to the predicted power value of the compressor in the standard refrigerant state;
when the second ratio is greater than or equal to a fourth threshold, the refrigerant pressure relief valve is opened, the discharge rate is a third preset rate, and the discharge duration is a third preset duration;
when the second ratio is greater than or equal to a fifth threshold and less than a fourth threshold, the refrigerant pressure relief valve is opened, the discharge rate is a fourth preset rate, and the discharge duration is a fourth preset duration;
when the second ratio is smaller than or equal to a sixth threshold value, the refrigerant relief valve is closed, and the refrigerant is stopped from being discharged from the air conditioner;
wherein the fifth threshold is greater than the sixth threshold,
the value range of the third preset rate is as follows: greater than or equal to 7g/min and less than or equal to 12g/min,
the value range of the fourth preset rate is as follows: more than 0g/min and less than or equal to 10g/min.
12. The method for detecting the refrigerant quantity of an air conditioner as claimed in claim 11, further comprising calculating the refrigerant discharge quantity according to the following calculation formula:
∑G volume of drawing and releasing ＝V 3 ·T 3 +V 4 ·T 4 ；
Wherein, V 3 For said third predetermined rate, V 4 For said fourth predetermined rate, T 1 For the third predetermined duration, T 2 And the fourth preset time length.
13. A system for detecting the amount of refrigerant in an air conditioner, comprising:
the data acquisition module is used for acquiring values of a plurality of operating parameters of the air conditioner in a fluorine deficiency detection mode, wherein the operating parameters comprise actual power of a compressor;
the compressor power prediction module is used for inputting the values of parameters except the actual compressor power in the plurality of operation parameters into a standard refrigerant state compressor power prediction model of a standard refrigerant state compressor power prediction model to obtain a standard refrigerant state compressor power prediction value, wherein the standard refrigerant state compressor power prediction value is the compressor power prediction value of the air conditioner which operates in the current operation state under the condition that the refrigerant quantity is the rated refrigerant quantity;
and the refrigerant filling control module for the actual power value of the compressor is used for judging the refrigerant quantity condition of the air conditioner according to the predicted power value of the compressor in the standard refrigerant state and the actual power value of the compressor.
14. An air conditioner refrigerant amount detection system, comprising one or more processors and a non-transitory computer readable storage medium storing program instructions, wherein when the program instructions are executed by the one or more processors, the one or more processors are configured to implement the method according to any one of claims 1 to 12.
15. A detection device, characterized in that it employs the method of any one of claims 1-12, or comprises the system of claim 13, or comprises the system of claim 14.
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| CN104315666A (en) * | 2014-10-30 | 2015-01-28 | 广东美的制冷设备有限公司 | Air conditioner and coolant leakage warning method for air conditioner |
| CN110836519A (en) * | 2018-08-16 | 2020-02-25 | 奥克斯空调股份有限公司 | Air conditioner refrigerant leakage detection method and detection system |
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