CN112361528A - Control method and control device of air conditioner, storage medium and processor - Google Patents
Control method and control device of air conditioner, storage medium and processor Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000003507 refrigerant Substances 0.000 claims abstract description 215
- 230000003434 inspiratory effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 17
- 238000004378 air conditioning Methods 0.000 description 14
- 238000013021 overheating Methods 0.000 description 4
- 230000010412 perfusion Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
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- 238000005259 measurement Methods 0.000 description 2
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- 230000005856 abnormality Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 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
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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
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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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
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Abstract
The invention discloses a control method and a control device of an air conditioner, a storage medium and a processor. Wherein, the method comprises the following steps: receiving a starting instruction of an air conditioner; determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner; and under the condition that the dosage of the refrigerant of the air conditioner is accurate, determining whether to control the air conditioner to start or not according to the suction pressure and the inlet pipe temperature of the evaporator. The invention solves the technical problem that the compressor is damaged due to incorrect refrigerant dosage or variety of the air conditioner in the prior art.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and a control device of an air conditioner, a storage medium and a processor.
Background
The refrigerant is a working medium in the vapor compression cycle system of the air conditioner, the refrigerating capacity of the air conditioner is related to the refrigerant filled in the air conditioner, each air conditioner has the matched refrigerant type and the proper filling amount, and the premise that the air conditioner operates efficiently for a long time is that the proper refrigerant type and the filling amount are provided. If the refrigerant filled in the air conditioning system is too little or the refrigerant type is not matched with the compressor of the air conditioning system, the compressor is directly started under the condition, the refrigeration effect of the air conditioning system is greatly reduced, the compressor of the air conditioner is accelerated to be worn due to too large load, even the compressor or an air conditioning pipeline is damaged, and the reliability of the air conditioning system is greatly reduced.
In view of the above-mentioned problem that the compressor is damaged due to incorrect refrigerant dosage or type of the air conditioner in the prior art, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the invention provides a control method and a control device of an air conditioner, a storage medium and a processor, which at least solve the technical problem that a compressor is damaged due to incorrect refrigerant dosage or type of the air conditioner in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a control method of an air conditioner, including: receiving a starting instruction of an air conditioner; determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner; and under the condition that the dosage of the refrigerant of the air conditioner is accurate, determining whether to control the air conditioner to start or not according to the suction pressure and the inlet pipe temperature of the evaporator.
Further, before determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner, the method further includes: obtaining the shutdown time of the air conditioner; detecting whether the downtime is greater than the preset time; if the shutdown time is more than or equal to the preset time, determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner; and if the shutdown time is less than the preset time, determining that the dosage of the refrigerant of the air conditioner is accurate.
Further, before determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner, the method further includes: acquiring the ambient temperature and the evaporator inlet pipe temperature; comparing the obtained ambient temperature with the evaporator inlet pipe temperature; if the absolute value of the difference value between the acquired environment temperature and the evaporator inlet pipe temperature is greater than or equal to a second preset value, determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner; and if the absolute value of the difference value between the acquired environment temperature and the evaporator inlet pipe temperature is smaller than a second preset value, determining that the dosage of the refrigerant of the air conditioner is accurate.
Further, determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner includes: if the state of the refrigerant is in a superheat zone, determining that the dosage of the refrigerant is inaccurate; and if the state of the refrigerant is not in the overheating area, determining that the dosage of the refrigerant is accurate.
Further, under the condition that the dosage of the refrigerant of the air conditioner is accurate, whether the air conditioner is controlled to start or not is determined according to the suction pressure and the temperature of an inlet pipe of the evaporator, and the method comprises the following steps: judging whether the type of the refrigerant is correct or not according to the suction pressure and the temperature of an inlet pipe of the evaporator; and if the type of the refrigerant is correct, controlling the air conditioner to start.
Further, the method for judging whether the type of the refrigerant is correct or not according to the suction pressure and the inlet pipe temperature of the evaporator comprises the following steps: acquiring target pressure corresponding to a target refrigerant at the inlet pipe temperature of the evaporator according to the inlet pipe temperature of the evaporator, wherein the target refrigerant is a refrigerant with an accurate type; comparing the suction pressure with a target pressure; and if the absolute value of the difference value between the suction pressure and the target pressure is smaller than a first preset value, determining that the type of the refrigerant is correct.
According to another aspect of the embodiments of the present invention, there is also provided a control apparatus of an air conditioner, including: the receiving module is used for receiving a starting instruction of the air conditioner; the acquisition module is used for acquiring the state of the refrigerant of the air conditioner and determining whether the dosage of the refrigerant is accurate or not according to the state of the refrigerant of the air conditioner; and the control module is used for determining whether to control the air conditioner to start or not according to the suction pressure and the evaporator inlet pipe temperature under the condition that the dosage of the refrigerant of the air conditioner is accurate.
Further, the acquisition module includes: the temperature acquisition module is used for acquiring the temperature of the evaporator inlet pipe; the pressure acquisition module is used for acquiring suction pressure; the control device further includes: and the timing module is used for acquiring the shutdown time of the air conditioner, and determining that the dosage of the refrigerant of the air conditioner is accurate if the shutdown time is less than the preset time.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium including: and a stored program, wherein the control method of the air conditioner is executed by controlling the device on which the storage medium is located when the program is executed.
According to another aspect of the embodiments of the present invention, there is also provided a processor for executing a program, wherein the program executes the control method of the air conditioner.
In the embodiment of the invention, whether the type of refrigerant is in the overheating area or not is judged by detecting the pressure and the temperature in the air conditioning system before starting and according to the corresponding position in the pressure-enthalpy diagram, so that whether the dosage and the type of the refrigerant of the air conditioner are proper or not can be obtained, the warning is triggered under the condition that the dosage and the type of the refrigerant are not proper, the air conditioner cannot be started forcibly, the problem that a compressor is damaged due to incorrect dosage or type of the refrigerant of the air conditioner is solved, the resource waste is reduced, and the reliability of the air conditioning system is greatly improved.
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 application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of an alternative control method of an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart of an alternative control method of an air conditioner according to an embodiment of the present invention;
fig. 4 is a flowchart of a refrigerant type determination method in an alternative control method of an air conditioner according to an embodiment of the present invention;
FIG. 5 is a flow chart of an alternative air conditioner control method and a corresponding implementation block diagram according to an embodiment of the invention;
fig. 6 is a schematic diagram of a control system of an air conditioner according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the present invention, there is provided an embodiment of a control method of an air conditioner, it should be noted that the steps shown in the flowchart of the drawings may be executed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that here.
Fig. 1 is a control method of an air conditioner according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:
step S101, receiving a starting instruction of an air conditioner;
step S102, determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner;
and step S103, determining whether to control the air conditioner to start according to the suction pressure and the evaporator inlet pipe temperature under the condition that the dosage of the refrigerant of the air conditioner is accurate.
Receiving a starting instruction of the air conditioner, namely a state that the air conditioner is powered on but an air conditioner internal unit or an air conditioner external unit is not started to work formally, and entering the state that the refrigerant of the air conditioner is obtained in the step S102 after the air conditioner is powered on.
In step S102, it is determined whether the refrigerant dosage is accurate, including the case where the refrigerant is not accurately metered and the case where the refrigerant is accurate. Inaccurate refrigerant dosage comprises that the refrigerant is filled too little or too much, which does not meet the requirement of normal operation of the compressor in the current air conditioner; when the dosage of the refrigerant is accurate, the perfusion quantity of the refrigerant is matched with the current air conditioner, whether the type of the refrigerant is matched with the current air conditioner or not is further judged according to the suction pressure of the compressor and the temperature of an inlet pipe of the evaporator, and the air conditioner is controlled to be started only under the condition that the dosage and the type of the refrigerant are both accurate. And under the condition that the filling amount of the refrigerant is insufficient or the types of the refrigerant are not matched, the air conditioner is controlled not to be started, and the damage to a compressor or a pipeline of the air conditioner is avoided.
The state of the refrigerant of the air conditioner includes, but is not limited to, the pressure and the temperature of the refrigerant in the pipeline, and since different refrigerants can determine the position of the refrigerant in the corresponding pressure-enthalpy diagram by measuring the pressure and the temperature of the refrigerant, the position in the pressure-enthalpy diagram corresponds to the state of the refrigerant. Step S102, whether the dosage is accurate is determined according to the state of the refrigerant, specifically, the pressure and the temperature of the refrigerant in the pipeline are obtained, the heat state of the refrigerant is judged corresponding to the position in the pressure-enthalpy diagram, and if the heat is too high, the dosage of the refrigerant is insufficient. For example, the pressure of the refrigerant in the pipeline is measured, the saturation temperature corresponding to the type of refrigerant can be calculated according to the pressure enthalpy parameter table, the measured temperature of the refrigerant in the pipeline is compared with the saturation temperature, and if the measured temperature in the pipeline is higher than the saturation temperature, the dosage of the air-conditioning refrigerant is insufficient, so that the refrigerating capacity of the air conditioner is insufficient.
The pressure and the temperature of the refrigerant in the pipeline can be respectively represented by the suction pressure of the compressor or the temperature of the inlet pipe of the evaporator (namely the inlet pipe temperature of the evaporator), the measurement of the suction pressure can be realized by arranging a pressure sensor in the suction pipeline of the compressor, and the measurement of the inlet pipe temperature of the evaporator can be realized by arranging a temperature sensor in the input pipeline of the evaporator. The location of the pressure sensor and the temperature sensor may be different due to different structures of different types of compressors or evaporators, and is not limited herein.
In step S103, the type of the refrigerant is determined according to the suction pressure and the evaporator inlet pipe temperature, specifically, the type of the refrigerant is determined according to the correspondence between the refrigerant pressure and the enthalpy value (i.e., the corresponding position in the pressure-enthalpy diagram). The saturation pressures of different types of refrigerants are different at the same temperature, so that the categories of different refrigerants can be distinguished. For example, after the temperature of the inlet pipe of the evaporator is obtained, the saturation pressure corresponding to the refrigerant of the type can be calculated through the pressure enthalpy parameter table, the saturation pressure difference is compared with the obtained suction pressure, and if the difference value is larger than a reasonable pressure difference range, the type of the refrigerant is not matched with the type of the refrigerant in the pressure enthalpy parameter table.
According to the steps, the positions of the air-conditioning system in the corresponding pressure-enthalpy diagram are determined by detecting the suction pressure and the temperature of the evaporator inlet pipe before the air conditioner is started, and then the state of the refrigerant is obtained, so that an operator can obtain whether the dosage and the type of the refrigerant of the air conditioner are proper or not, an alarm is triggered under the condition that the dosage and the type of the refrigerant are not accurate, the air conditioner cannot be started forcibly, the problem that the compressor is damaged due to incorrect dosage or type of the refrigerant of the air conditioner is solved, the resource waste is reduced, and the reliability of the air conditioning system is improved.
Further, before determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner, the method further includes: obtaining the shutdown time of the air conditioner; detecting whether the downtime is greater than the preset time; if the shutdown time is more than or equal to the preset time, determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner; and if the shutdown time is less than the preset time, determining that the dosage of the refrigerant of the air conditioner is accurate.
The preset time is used for judging whether the air conditioner is electrified before receiving a starting instruction of the air conditioner. The filling process of the refrigerant is generally completed before the air conditioner leaves a factory, and the air conditioner is not powered on from the time of leaving the factory to the time of installing a user, so that the preset time is set according to the reasonable time between the time of leaving the factory and the time of installing the user. If the shutdown time of the air conditioner is longer than the preset time, it indicates that the air conditioner may have a long enough time before the user installs the air conditioner and the refrigerant dosage is not detected, so it is necessary to determine whether the refrigerant dosage is accurate according to the above steps S101-S103 to avoid damaging the compressor due to no refrigerant filling during the first power-on. If the shutdown time is less than the preset time, which indicates that the air conditioner has been electrified recently, the judgment of the refrigerant dosage is carried out according to the steps, and the electrification is not required to be repeatedly detected.
Optionally, the shutdown time may be implemented by adding a timing module in a power supply circuit of the air conditioner, where the timing module has an independent power supply, so that the timing module can normally operate to time the shutdown time of the air conditioner when the air conditioner is not powered on.
Further, before determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner, the method further includes: acquiring the ambient temperature and the evaporator inlet pipe temperature; comparing the obtained ambient temperature with the evaporator inlet pipe temperature; if the absolute value of the difference value between the acquired environment temperature and the evaporator inlet pipe temperature is greater than or equal to a second preset value, determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner; and if the absolute value of the difference value between the acquired environment temperature and the evaporator inlet pipe temperature is smaller than a second preset value, determining that the dosage of the refrigerant of the air conditioner is accurate.
The second preset value is a difference value between the temperature of the inlet pipe of the evaporator and the ambient temperature when the air conditioner normally works under the dosage of the enough refrigerator, and the second preset value is different because different types of air conditioners have different heat exchange capacities and is not limited herein. The temperature of the inlet pipe of the evaporator can be used for representing the temperature of the refrigerant in the pipeline of the air conditioner, and if the absolute value of the difference value between the ambient temperature and the temperature of the inlet pipe of the evaporator is greater than or equal to a second preset value, the temperature in the pipe of the air conditioner can be indicated to have two conditions: the cooling operation is already normal, so that the evaporator inlet temperature is far lower than the ambient temperature, or the refrigerant dosage is not enough, so that the evaporator inlet temperature is far higher than the ambient temperature, and therefore, the operation needs to go to step S102 to determine which of the foregoing situations specifically belongs. Correspondingly, if the absolute value of the difference value between the ambient temperature and the inlet pipe temperature of the evaporator is smaller than the second preset value, the dosage of the refrigerator is accurate, and the pipeline in the air conditioner obtains a corresponding refrigeration effect.
Further, determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner includes: if the state of the refrigerant is in a superheat zone, determining that the dosage of the refrigerant is inaccurate; and if the state of the refrigerant is not in the overheating area, determining that the dosage of the refrigerant is accurate.
The superheat region can be determined by the temperature and the pressure of the refrigerant of a certain type, and the pressure-enthalpy diagram is used for representing the relation between the pressure and the enthalpy value of the refrigerant, because the pressure and the temperature of the refrigerant of different types have corresponding positions in the corresponding pressure-enthalpy diagram. The superheat zone is also understood to be a region of the pressure-enthalpy diagram which is greater than the corresponding saturation temperature at a specific pressure, i.e. the refrigerant is at a specific pressure and a temperature greater than the saturation temperature, and the refrigerant is not dosed enough to result in insufficient refrigeration capacity. Before the air conditioner is started, if the refrigerant standing in the pipeline is in a superheated area, and the refrigerant is in a gas state, the situation that the refrigerant with a rated dose is not filled can be judged, and the refrigerating requirement of the air conditioner cannot be met.
Further, under the condition that the dosage of the refrigerant of the air conditioner is accurate, whether the air conditioner is controlled to start or not is determined according to the suction pressure and the temperature of an inlet pipe of the evaporator, and the method comprises the following steps: judging whether the type of the refrigerant is correct or not according to the suction pressure and the temperature of an inlet pipe of the evaporator; and if the type of the refrigerant is correct, controlling the air conditioner to start.
Under the condition that the dosage of the refrigerant of the air conditioner is accurate, the actually measured suction pressure of the refrigerant and the temperature of an inlet pipe of an evaporator are consistent with the position of a curve in a pressure-enthalpy diagram, because the saturation pressures of different types of refrigerants at the same temperature are different, if the actually measured suction pressure is different from the saturation pressure corresponding to the temperature in the pressure-enthalpy diagram, the type of the refrigerant can be judged according to the actually measured suction pressure value.
Further, the method for judging whether the type of the refrigerant is correct or not according to the suction pressure and the inlet pipe temperature of the evaporator comprises the following steps: acquiring target pressure corresponding to a target refrigerant at the inlet pipe temperature of the evaporator according to the inlet pipe temperature of the evaporator, wherein the target refrigerant is a refrigerant with an accurate type; comparing the suction pressure with a target pressure; and if the absolute value of the difference value between the suction pressure and the target pressure is smaller than a first preset value, determining that the type of the refrigerant is correct.
The target pressure is the corresponding saturation pressure of the target refrigerant at the inlet pipe temperature of the evaporator, and the saturation pressures of different types of refrigerants at the same temperature are different, so that the categories of different refrigerants can be distinguished. The suction pressure should be equal to the target pressure in case the refrigerant type is correct. The absolute value of the difference between the suction pressure and the target pressure is smaller than a first preset value, including the suction pressure being greater than the target pressure or the suction pressure being smaller than the target pressure, and in the case that the type of the refrigerator is determined, the saturation pressure value at the determined temperature is determined, so that whether the suction pressure is greater than or less than the target pressure, it can be determined that the type of the refrigerator is incorrect. The first preset value is an error range of saturation pressure corresponding to the refrigerant at the inlet pipe temperature of the evaporator, and the absolute value of the difference between the suction pressure and the target pressure is smaller than the first preset value.
Through the steps, whether the dosage and the type of the refrigerant of the air conditioner are proper or not can be obtained, the warning is triggered under the condition that the dosage and the type of the refrigerant are not proper, the air conditioner cannot be started forcibly, the problem that a compressor is damaged due to incorrect dosage or type of the refrigerant of the air conditioner is solved, the resource waste is reduced, and the reliability of an air conditioning system is greatly improved.
Fig. 2 is a flowchart of an alternative control method of an air conditioner, as shown in fig. 2, the method includes the following steps:
step S201, obtaining and recording the downtime t.
Step S202, judging whether the air conditioner shutdown time T is greater than the preset shutdown time T0, if so, entering step S203, and then entering step S204, after obtaining the pressure P in the air conditioner pipe and the pipe temperature T, wherein the pressure P can be the suction pressure at the input pipeline of the compressor, the pipe temperature T can be the evaporator pipe inlet temperature, and if not, indicating that the dosage of the refrigerant is accurate, entering step S208.
Step S204, judging whether the working point is in a superheat area in the pressure-enthalpy diagram, if so, entering step S205, sending a refrigerant abnormity warning and recording warning faults, then entering step S206, and if not, indicating that the dosage of the refrigerant is accurate, then entering step S208.
Step S206, whether forced start is selected, if not, the step S207 is carried out to keep the refrigerant abnormal warning, the compressor is controlled not to be started, the damage of the compressor caused by insufficient refrigerant filling amount is avoided, and if the forced start is selected, the step S208 is carried out.
In step S208, the shutdown time t is reset, and the air conditioner enters a refrigerant determination logic, where the refrigerant determination logic is used to determine whether the type of the refrigerant (i.e., refrigerant) is accurate.
Fig. 4 is a logic flow diagram of refrigerant determination of an alternative air conditioner control method, and as shown in fig. 4, the refrigerant determination flow includes the following steps:
in step S401, the saturation pressure P1 of the refrigerant of the type is obtained from the temperature T of the tube,
step S402, determining | P1-P | is not more than Δ P, where Δ P is a predetermined pressure difference (i.e. the first predetermined value); if the judgment result is yes, the type of the refrigerant is accurate, the step S403 is entered, the air conditioner is controlled to enter normal starting logic, if the judgment result is no, the refrigerant type is wrong, the step S404 is entered, the warning of refrigerant perfusion error is kept, and the warning fault is recorded.
The pressure P is the suction pressure at the input pipeline of the compressor, and the pipe temperature T is the evaporator inlet pipe temperature.
Fig. 3 is an alternative control method of an air conditioner according to an embodiment of the present invention, as shown in fig. 3, the control method includes the following steps:
step S301, obtaining the environmental temperature T0Pressure in the air conditioning duct P and duct temperature T.
Step S302, judging the environmental temperature T0And the absolute value of the difference value between the refrigerant temperature and the tube temperature T is greater than or equal to a preset temperature difference (namely, a second preset value), if the judgment result is yes, the step S303 is carried out for further logic judgment, and if the judgment result is no, the dosage of the refrigerant is accurate, the step S307 is carried out.
Step S303 is to determine whether the operating point (i.e., the acquired air-conditioning duct pressure P and duct temperature T) is in the superheat region in the pressure-enthalpy diagram, and if yes, the process proceeds to step S304, and after a refrigerant abnormality warning is issued and a warning failure is recorded, the process proceeds to step S305.
Step S305, selecting whether to start the compressor forcibly, if not, entering step S306 to keep the refrigerant abnormal warning, and controlling the compressor to be incapable of starting, so as to avoid the damage of the compressor caused by the forced start of the compressor filled with wrong refrigerant; if forced power-on is selected, the process proceeds to step S307.
In step S307, the air conditioner enters the refrigerant determination logic to further determine whether the type of the refrigerant is accurate, and optionally, in step S307, the above steps S401 to S404 may be repeated to determine whether the type of the refrigerant is accurate.
Fig. 5 is a flowchart of an alternative control method of an air conditioner according to an embodiment of the present invention, and a schematic diagram of an implementation apparatus of each step, as shown in fig. 5, the control method includes:
step S501, recording the shutdown time t, which can be realized by the independent timing module 50 disposed in the air conditioner power supply circuit, where the independent timing module has a power supply circuit independent of the air conditioner power supply, so as to ensure that the independent timing module 50 can normally time when the air conditioner is not powered on.
In step S502, data of the temperature T and the pressure P are acquired, and may be implemented by the sensor 51 disposed at the corresponding position. Optionally, the sensor 51 includes a thermal bulb and a pressure sensor, the thermal bulb may be disposed at an external unit of the air conditioner to detect an ambient temperature, or disposed near an evaporator pipeline to detect an evaporator inlet temperature; a pressure sensor may be provided in a pipe of the compressor to detect a suction pressure.
In step S503, the refrigerant property determination is performed to determine whether the type of the refrigerant is accurate, and the determination may be performed by the internal pressure enthalpy parameter table calculator 52, and optionally, the internal pressure enthalpy parameter table calculator may determine the type of the refrigerant by embedding the refrigerant property parameter and the refrigerant type selection table in the control program of the air conditioner and by performing a comparison.
Step S504, logic judgment and processing, including but not limited to the judgment of the shutdown time in step S202, the judgment of whether the heat region is in the overheat region in step S204, the judgment of whether the forced startup is selected in step S206, the judgment of the difference between the ambient temperature and the tube temperature T in step S302, and the like, may be implemented by the logic control module 53, and the method steps of the logic judgment and processing are executed according to a preset software program.
Step S505, displaying and recording the alarm, which can be realized by the display screen 54, and the display screen 54 can prompt the engineer to perform corresponding processing according to the fault type corresponding to the alarm display. For example, the display screen may display a refrigerant non-charge alert.
It should be noted that, each time the air conditioner is powered on, the filling amount and the type of the refrigerant are determined according to the steps in the control method. If the alarm is triggered and the air conditioner is modified according to the alarm content, the air conditioner can detect whether the refrigerant is abnormal again after being electrified again so as to avoid faults caused by non-perfusion or wrong perfusion of the refrigerator.
In the embodiment, whether the working point of the refrigerant in the air conditioner is in the overheating area or not is determined by detecting the pressure P and the temperature T in the air conditioning system before starting, so that whether the air conditioner is filled with the refrigerant or whether the dosage is enough can be obtained, meanwhile, the working point can be compared with the refrigerant physical property parameter and the refrigerant type selection table which are built in an air conditioner control program to determine whether the type of the refrigerant is correct or not, and corresponding triggering warning is carried out to forbid the starting of the compressor, so that the reliability of the air conditioner is improved.
Example 2
According to an embodiment of the present invention, there is provided an embodiment of a control apparatus for an air conditioner, as shown in fig. 6, including: the receiving module 61 is used for receiving a starting instruction of the air conditioner; the obtaining module 62 is configured to obtain a state of a refrigerant of the air conditioner, and determine whether a dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner; and the control module 63 is used for determining whether to control the air conditioner to start or not according to the suction pressure and the evaporator inlet pipe temperature under the condition that the dosage of the refrigerant of the air conditioner is accurate.
Optionally, the obtaining module includes: the temperature acquisition module is used for acquiring the temperature of the evaporator inlet pipe; the pressure acquisition module is used for acquiring suction pressure; the control device further includes: and the timing module is used for acquiring the shutdown time of the air conditioner, and determining that the dosage of the refrigerant of the air conditioner is accurate if the shutdown time is less than the preset time.
In addition, the temperature acquisition module can also be used for acquiring the ambient temperature.
According to an embodiment of the present invention, there is provided an embodiment of a storage medium of an air conditioner, the storage medium including a stored program, wherein when the program runs, a device on which the storage medium is controlled to execute the control method of the air conditioner.
According to an embodiment of the present invention, an embodiment of a processor of an air conditioner is provided, where the processor is configured to run a program, where the program is executed when running to perform the control method of the air conditioner.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
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 units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A control method of an air conditioner, comprising:
receiving a starting instruction of an air conditioner;
determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner;
and under the condition that the dosage of the refrigerant of the air conditioner is accurate, determining whether to control the air conditioner to start or not according to the suction pressure and the evaporator inlet pipe temperature.
2. The method of claim 1, before determining whether the refrigerant dosage is accurate according to a state of the refrigerant of the air conditioner, the method further comprising:
obtaining the shutdown time of the air conditioner;
detecting whether the downtime is greater than a preset time;
if the shutdown time is greater than or equal to the preset time, determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner;
and if the shutdown time is less than the preset time, determining that the dosage of the refrigerant of the air conditioner is accurate.
3. The method of claim 1, before determining whether the refrigerant dosage is accurate according to a state of the refrigerant of the air conditioner, the method further comprising:
acquiring the ambient temperature and the evaporator inlet pipe temperature;
comparing the obtained ambient temperature with the evaporator inlet pipe temperature;
if the absolute value of the difference value between the acquired environment temperature and the evaporator inlet pipe temperature is larger than or equal to a second preset value, determining whether the dosage of the refrigerant is accurate according to the state of the refrigerant of the air conditioner;
and if the absolute value of the difference value between the acquired environment temperature and the evaporator inlet pipe temperature is smaller than the second preset value, determining that the dosage of the refrigerant of the air conditioner is accurate.
4. The method of claim 1, wherein determining whether the refrigerant dosage is accurate according to a state of the refrigerant of the air conditioner comprises:
determining that the refrigerant is not dosed accurately if the state of the refrigerant is in a superheat zone;
determining that the refrigerant is dosed accurately if the state of the refrigerant is not in the superheat zone.
5. The method of claim 1, wherein determining whether to control the air conditioner to start up according to the suction pressure and the evaporator inlet temperature under the condition that the dosage of the refrigerant of the air conditioner is accurate comprises:
judging whether the type of the refrigerant is correct or not according to the suction pressure and the temperature of an inlet pipe of the evaporator;
and if the type of the refrigerant is correct, controlling the air conditioner to start.
6. The method of claim 5, wherein determining whether the type of the refrigerant is correct based on the suction pressure and the evaporator inlet temperature comprises:
acquiring target pressure corresponding to a target refrigerant at the evaporator inlet pipe temperature according to the evaporator inlet pipe temperature, wherein the target refrigerant is a refrigerant with an accurate type;
comparing the inspiratory pressure with the target pressure;
and if the absolute value of the difference value between the suction pressure and the target pressure is smaller than a first preset value, determining that the type of the refrigerant is correct.
7. A control device of an air conditioner, characterized by comprising:
the receiving module is used for receiving a starting instruction of the air conditioner;
the acquisition module is used for acquiring the state of the refrigerant of the air conditioner and determining whether the dosage of the refrigerant is accurate or not according to the state of the refrigerant of the air conditioner;
and the control module is used for determining whether to control the air conditioner to start or not according to the suction pressure and the evaporator inlet pipe temperature under the condition that the dosage of the refrigerant of the air conditioner is accurate.
8. The control device of claim 7, wherein the obtaining module comprises: the temperature acquisition module is used for acquiring the temperature of the evaporator inlet pipe; the pressure acquisition module is used for acquiring the suction pressure;
the control device further includes: and the timing module is used for acquiring the shutdown time of the air conditioner, and determining that the dosage of the refrigerant of the air conditioner is accurate if the shutdown time is less than the preset time.
9. A storage medium characterized by comprising a stored program, wherein an apparatus in which the storage medium is located is controlled to execute the control method of the air conditioner according to any one of claims 1 to 6 when the program is executed.
10. A processor, characterized in that the processor is configured to execute a program, wherein the program executes the control method of the air conditioner according to any one of claims 1 to 6.
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Application publication date: 20210212 |