CN113719978A - Control method and device of air conditioner and air conditioner - Google Patents
Control method and device of air conditioner and air conditioner Download PDFInfo
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- CN113719978A CN113719978A CN202010447993.2A CN202010447993A CN113719978A CN 113719978 A CN113719978 A CN 113719978A CN 202010447993 A CN202010447993 A CN 202010447993A CN 113719978 A CN113719978 A CN 113719978A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
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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
- F24F11/70—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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner control method and device and an air conditioner. Wherein the control method comprises the following steps: acquiring a discharge temperature detection value, an ambient temperature and a compressor running frequency; obtaining a corrected value of the exhaust temperature according to the ambient temperature and the running frequency of the compressor; obtaining the exhaust superheat degree according to the exhaust temperature detection value and the exhaust temperature correction value; and adjusting the opening of the electric control valve according to the exhaust superheat degree. Because the exhaust superheat degree closer to the true value is obtained according to the exhaust temperature detection value and the exhaust temperature correction value, the opening degree of the electric control valve can be adjusted by utilizing the exhaust superheat degree closer to the true value, so that the problem that the refrigerant circulation quantity does not conform to the actually required refrigerant circulation quantity can be avoided, and the operation reliability of the air conditioner can be improved.
Description
Technical Field
The present invention relates to the field of air conditioners, and in particular, to a method and an apparatus for controlling an air conditioner, and a computer-readable storage medium.
Background
The degree of superheat of the exhaust gas of the air conditioner is an important parameter for controlling the opening degree of an electronic expansion valve of the air conditioner. During the operation of the air conditioner, if the exhaust superheat degree of the air conditioner is increased, the air conditioner increases the opening degree of the electronic expansion valve to increase the refrigerant circulation amount. The discharge superheat is generally obtained from the difference between the discharge temperature of the compressor and the high-pressure saturation temperature of the refrigerant, wherein a discharge temperature sensor is usually installed near the discharge end of the compressor to detect the discharge temperature of the compressor.
However, the temperature value detected by the discharge temperature sensor is often the body temperature of the compressor. In the case of no consideration of heat dissipation, because the compressor accumulates heat during operation, the temperature value detected by the discharge temperature sensor is often higher than the actual temperature of the gaseous refrigerant discharged by the compressor (i.e. the actual value of the discharge temperature); in consideration of heat dissipation, the temperature detected by the exhaust gas temperature sensor is lower than the actual value of the exhaust gas temperature. Therefore, if the opening degree of the electronic expansion valve is controlled only according to the temperature value detected by the exhaust temperature sensor, the problem that the circulation amount of the refrigerant does not conform to the actually required circulation amount of the refrigerant occurs, thereby affecting the operation reliability of the air conditioner.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides a control method and device of an air conditioner, the air conditioner and a computer readable storage medium, which can correct the exhaust superheat degree of the air conditioner, thereby improving the operation reliability of the air conditioner.
In a first aspect, an embodiment of the present invention provides a method for controlling an air conditioner, including:
acquiring a discharge temperature detection value, an ambient temperature and a compressor running frequency;
obtaining a discharge temperature correction value according to the environment temperature and the compressor running frequency;
obtaining the exhaust superheat degree according to the exhaust temperature detection value and the exhaust temperature correction value;
and adjusting the opening of the electric control valve according to the exhaust superheat degree.
According to the control method of the air conditioner, when the air conditioner adjusts the opening degree of the electric control valve according to the exhaust superheat degree, the exhaust temperature detection value, the ambient temperature and the compressor operation frequency are obtained firstly, then the exhaust temperature correction value is obtained according to the ambient temperature and the compressor operation frequency, further the exhaust superheat degree closer to the true value can be obtained according to the exhaust temperature detection value and the exhaust temperature correction value, and therefore the opening degree of the electric control valve can be adjusted by the exhaust superheat degree closer to the true value. Therefore, the control method provided by the embodiment of the invention can correct the exhaust superheat degree of the air conditioner, and avoid the problem that the circulating quantity of the refrigerant does not accord with the actually required circulating quantity of the refrigerant, thereby improving the operation reliability of the air conditioner.
Optionally, in an embodiment of the present invention, the obtaining the discharge temperature correction value according to the ambient temperature and the compressor operation frequency includes:
obtaining a discharge temperature deviation value according to the environment temperature and the running frequency of the compressor;
and obtaining a corrected exhaust temperature value according to the ambient temperature, the compressor running frequency and the exhaust temperature deviation value.
Because the environment temperature and the compressor running frequency can influence the exhaust temperature, the exhaust temperature deviation value is obtained according to the environment temperature and the compressor running frequency, and then the exhaust temperature correction value related to the environment temperature and the compressor running frequency is obtained according to the environment temperature, the compressor running frequency and the exhaust temperature deviation value, so that the accurate exhaust superheat degree can be obtained in the subsequent steps.
Optionally, in an embodiment of the present invention, the obtaining of the discharge temperature correction value according to the ambient temperature, the compressor operation frequency and the discharge temperature offset value includes,
the exhaust temperature correction value is obtained according to the following formula:
TPcorrection＝a*Fx+b*TOuter cover+ΔT
Wherein, TPCorrectionThe corrected value of the exhaust temperature is obtained; fx is the compressor operating frequency; t isOuter coverIs the ambient temperature; Δ T is the exhaust temperature offset value; a and b are weight coefficients, respectively.
The exhaust temperature correction value is calculated by using a formula related to the environment temperature and the compressor operation frequency, so that the influence of the environment temperature and the compressor operation frequency on the calculated exhaust temperature can be reduced, and the accurate exhaust temperature correction value can be obtained.
Alternatively, in an embodiment of the present invention, the obtaining of the degree of superheat of the exhaust gas based on the detected value of the exhaust temperature and the corrected value of the exhaust temperature includes,
the degree of superheat of the exhaust gas is obtained according to the following formula:
TDSH＝TP+TPcorrection-TChangeable pipe
Wherein, TDSHThe degree of superheat of the exhaust gas is; TP is the exhaust temperature detection value; t isChangeable pipeIs the temperature of the heat exchanger.
Compared with the prior art in which the exhaust superheat degree calculated according to the temperature value detected by the exhaust temperature sensor is directly adopted, the corrected exhaust superheat degree calculated by using the formula can be closer to a true value, so that the opening degree of the electric control valve can be accurately controlled according to the corrected exhaust superheat degree in the subsequent step.
Optionally, in an embodiment of the present invention, the adjusting the opening of the electrically controlled valve according to the superheat degree of the exhaust gas includes:
acquiring the exhaust superheat degree once every first interval time, and comparing the exhaust superheat degree with a first superheat degree threshold value to obtain a first comparison result;
and adjusting the opening of the electric control valve according to the first comparison result.
After the corrected exhaust superheat degree is obtained, the corrected exhaust superheat degree is compared with a first superheat degree threshold value to obtain a first comparison result, and then the opening degree of the electric control valve is adjusted according to the first comparison result, so that the problem that the refrigerant circulation quantity does not accord with the actually required refrigerant circulation quantity can be avoided, and the operation reliability of the air conditioner can be improved. In addition, after the opening degree of the electric control valve is adjusted, the refrigerant circulation quantity can be correspondingly adjusted, and the adjusted refrigerant circulation quantity can influence the exhaust superheat degree, so that the corrected exhaust superheat degree is obtained at first intervals, and the exhaust superheat degree is compared with the first superheat degree threshold value every time the corrected exhaust superheat degree is obtained, the opening degree of the electric control valve can be adjusted in real time, and the air conditioner can keep good operation reliability in the operation process.
Optionally, in an embodiment of the present invention, the adjusting the opening degree of the electrically controlled valve according to the first comparison result includes:
and when the exhaust superheat degree is smaller than a first superheat degree threshold value in the first comparison results of more than two consecutive times, reducing the opening degree of the electric control valve until the exhaust superheat degree is larger than or equal to the first superheat degree threshold value.
When the exhaust superheat degree is smaller than the first superheat degree threshold value in the first comparison results of more than two consecutive times, the current exhaust superheat degree is too small, and the refrigerant circulation amount is too large.
Optionally, in an embodiment of the present invention, the adjusting the opening degree of the electrically controlled valve according to the first comparison result further includes:
and when the first comparison result shows that the exhaust superheat degree is larger than or equal to a first superheat degree threshold value, keeping the current opening degree of the electric control valve unchanged.
When the first comparison result shows that the exhaust superheat degree is larger than or equal to the first superheat degree threshold value, the current exhaust superheat degree is proper, so that the current opening degree of the electric control valve can be kept unchanged to keep the operation reliability of the air conditioner.
Optionally, in an embodiment of the present invention, the adjusting the opening degree of the electrically controlled valve according to the first comparison result further includes:
in the process of reducing the opening degree of the electric control valve, acquiring the exhaust superheat degree once every second time interval, and comparing the exhaust superheat degree with a second superheat degree threshold value to obtain a second comparison result;
and adjusting the opening of the electric control valve according to the second comparison result.
In the process of reducing the opening degree of the electric control valve, the corrected exhaust superheat degree is compared with a second superheat degree threshold value to obtain a second comparison result, and then the opening degree of the electric control valve is adjusted according to the second comparison result, so that the problem that the circulating quantity of the refrigerant does not accord with the actually required circulating quantity of the refrigerant in the process of reducing the opening degree of the electric control valve can be avoided, and the operation reliability of the air conditioner can be improved. In addition, after the opening degree of the electric control valve is adjusted, the refrigerant circulation quantity can be correspondingly adjusted, and the adjusted refrigerant circulation quantity can influence the exhaust superheat degree, so that the corrected exhaust superheat degree is obtained every second time interval, and the exhaust superheat degree is compared with a second superheat degree threshold value every time the corrected exhaust superheat degree is obtained, the opening degree of the electric control valve can be adjusted in real time, and the air conditioner can keep good operation reliability in the operation process.
Optionally, in an embodiment of the present invention, the adjusting the opening degree of the electrically controlled valve according to the second comparison result includes:
and when the second comparison results of more than two consecutive times are that the exhaust superheat degree is greater than a second superheat degree threshold value, increasing the opening degree of the electric control valve until the exhaust superheat degree is less than or equal to the second superheat degree threshold value and is greater than or equal to a first superheat degree threshold value.
Under the condition that the second comparison results of more than two consecutive times are that the exhaust superheat degree is greater than the second superheat degree threshold value, the current exhaust superheat degree is too large and the refrigerant circulation quantity is too small in the process of reducing the opening degree of the electric control valve, so that the refrigerant circulation quantity can be increased by reversely increasing the opening degree of the electric control valve until the exhaust superheat degree is less than or equal to the second superheat degree threshold value and is greater than or equal to the first superheat degree threshold value, the exhaust superheat degree can be reduced, and the operation reliability of the air conditioner is maintained.
Optionally, in an embodiment of the present invention, the adjusting the opening degree of the electrically controlled valve according to the second comparison result further includes:
and when the second comparison result shows that the exhaust superheat degree is less than or equal to a second superheat degree threshold value and greater than or equal to a first superheat degree threshold value, keeping the current opening degree of the electric control valve unchanged.
And when the second comparison result shows that the exhaust superheat degree is less than or equal to the second superheat degree threshold value and greater than or equal to the first superheat degree threshold value, the current exhaust superheat degree is proper, so that the current opening degree of the electric control valve can be kept unchanged to keep the operation reliability of the air conditioner.
In a second aspect, an embodiment of the present invention further provides a control device for an air conditioner, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the control method as described above in the first aspect when executing the computer program.
The control device of the embodiment of the invention can execute the control method of the embodiment, when the opening of the electric control valve is adjusted according to the exhaust superheat degree, the exhaust temperature detection value, the ambient temperature and the compressor operation frequency are firstly obtained, then the exhaust temperature correction value is obtained according to the ambient temperature and the compressor operation frequency, and further the exhaust superheat degree closer to the true value can be obtained according to the exhaust temperature detection value and the exhaust temperature correction value, so that the opening of the electric control valve can be adjusted by utilizing the exhaust superheat degree closer to the true value. Therefore, the control device provided by the embodiment of the invention can correct the exhaust superheat degree of the air conditioner, avoid the problem that the refrigerant circulation quantity does not accord with the actually required refrigerant circulation quantity, and further improve the operation reliability of the air conditioner.
In a third aspect, an embodiment of the present invention further provides an air conditioner, including the control device as described in the second aspect.
The air conditioner provided by the embodiment of the invention is provided with the control device of the embodiment, when the air conditioner adjusts the opening degree of the electric control valve according to the exhaust superheat degree, the exhaust temperature detection value, the ambient temperature and the compressor operation frequency are firstly obtained, then the exhaust temperature correction value is obtained according to the ambient temperature and the compressor operation frequency, and further the exhaust superheat degree closer to the true value can be obtained according to the exhaust temperature detection value and the exhaust temperature correction value, so that the opening degree of the electric control valve can be adjusted by utilizing the exhaust superheat degree closer to the true value. Therefore, the air conditioner provided by the embodiment of the invention can correct the exhaust superheat degree, avoid the problem that the circulating quantity of the refrigerant does not accord with the actually required circulating quantity of the refrigerant, and further improve the operation reliability.
In a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, where computer-executable instructions are stored, and the computer-executable instructions are configured to cause a computer to execute the control method according to the first aspect.
Drawings
The accompanying drawings 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 example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic diagram of a system architecture platform for implementing a control method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of an air conditioner according to another embodiment of the present invention;
FIG. 4A is a table of values for exhaust temperature offset values in the cooling mode provided by one embodiment of the present invention;
FIG. 4B is a table of values for temperature offset values under heating mode, according to another embodiment of the present invention;
FIG. 5 is a table of values of weighting factors at different operating frequencies of the compressor according to one embodiment of the present invention;
fig. 6 is a flowchart of a control method of an air conditioner according to another embodiment of the present invention;
FIG. 7 is a table of values taken for a first time at various compressor operating frequencies in accordance with an embodiment of the present invention;
fig. 8 is a flowchart of a control method of an air conditioner according to another embodiment of the present invention;
FIG. 9 is a table of values for the degree step at different ambient temperatures according to one embodiment of the present invention;
fig. 10 is a flowchart of a control method of an air conditioner according to another embodiment of the present invention;
FIG. 11 is a table of values taken for a second time at different compressor operating frequencies according to another embodiment of the present invention;
fig. 12 is a flowchart of a control method of an air conditioner according to another embodiment of the present invention;
fig. 13 is a table for obtaining values of opening step values at different environmental temperatures according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that although functional block divisions are provided in the system drawings and logical orders are shown in the flowcharts, in some cases, the steps shown and described may be performed in different orders than the block divisions in the systems or in the flowcharts. The terms first, second and the like in the description and in the claims, and the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
When the air conditioner adjusts the opening degree of an electric control valve according to the exhaust superheat degree, an exhaust temperature detection value, an environment temperature and a compressor operation frequency are obtained firstly, then an exhaust temperature correction value is obtained according to the environment temperature and the compressor operation frequency, and further the exhaust superheat degree which is closer to a real value can be obtained according to the exhaust temperature detection value and the exhaust temperature correction value, so that the opening degree of the electric control valve can be adjusted by utilizing the exhaust superheat degree which is closer to the real value, the problem that the refrigerant circulation quantity does not accord with the actually required refrigerant circulation quantity can be avoided, and the operation reliability of the air conditioner can be improved.
The embodiments of the present invention will be further explained with reference to the drawings.
As shown in fig. 1, fig. 1 is a schematic diagram of a system architecture platform for executing a control method of an air conditioner according to an embodiment of the present invention. In the example of fig. 1, the system architecture platform includes a memory (not shown), a controller (not shown), a compressor 110, a four-way valve 120, an outdoor heat exchanger 130, an electronic control valve 140, and an indoor heat exchanger 150, wherein the memory, the compressor 110, the four-way valve 120, and the electronic control valve 140 are respectively connected to the controller, and the memory and the controller may be connected by a bus or other means.
When the cooling mode is performed, the refrigerant flows out of the compressor 110, and flows back to the compressor 110 through the four-way valve 120, the outdoor heat exchanger 130, the electric control valve 140, the indoor heat exchanger 150, and the four-way valve 120 in this order. When the heating mode is performed, the refrigerant flows out of the compressor 110, and flows back to the compressor 110 through the four-way valve 120, the indoor heat exchanger 150, the electric control valve 140, the outdoor heat exchanger 130, and the four-way valve 120 in this order.
In an embodiment, the electronic control valve 140 may be a solenoid valve, or may also be an electronic expansion valve, which may be appropriately selected according to the actual use condition, and this embodiment is not particularly limited.
The memory, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the controller, and the remote memory may be connected to the system architecture platform via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
Those skilled in the art will appreciate that the system architecture platform illustrated in FIG. 1 does not constitute a limitation on embodiments of the invention, and may include more or fewer components than those illustrated, or some components may be combined, or a different arrangement of components.
In the system architecture platform shown in fig. 1, the controller may call a control program stored in the memory, thereby performing a control method of the air conditioner.
Based on the above system architecture platform, the following provides various embodiments of the control method of the present invention.
As shown in fig. 2, fig. 2 is a flowchart of a control method of an air conditioner, which may be applied to the air conditioner with the above-described system architecture platform, according to an embodiment of the present invention, and the control method includes, but is not limited to, step S210, step S220, step S230, and step S240.
Step S210, a discharge temperature detection value, an ambient temperature, and a compressor operating frequency are acquired.
In one embodiment, the exhaust temperature detection value may be obtained by an exhaust temperature sensor provided at the compressor; in addition, the current ambient temperature can be acquired through a temperature sensor arranged in the air conditioner; in addition, the compressor operating frequency may be acquired by a controller inside the air conditioner.
It should be noted that, since the exhaust temperature detection value obtained by the exhaust temperature sensor disposed on the compressor is not the true value of the exhaust temperature, and both the ambient temperature and the compressor operating frequency affect the exhaust temperature, the current ambient temperature and the current compressor operating frequency can be obtained, so that the exhaust temperature detection value can be corrected according to the current ambient temperature and the current compressor operating frequency in the subsequent step.
And step S220, obtaining a discharge temperature correction value according to the ambient temperature and the running frequency of the compressor.
In an embodiment, since both the ambient temperature and the compressor operating frequency affect the exhaust temperature, after the ambient temperature and the compressor operating frequency are obtained, an exhaust temperature correction value can be obtained according to the ambient temperature and the compressor operating frequency, so that the exhaust temperature detection value can be conveniently corrected by using the exhaust temperature correction value in the subsequent step, and the corrected exhaust temperature detection value can be closer to the true value of the exhaust temperature.
It should be noted that the exhaust temperature correction value may be a positive number or a negative number, depending on the actual situation.
And step S230, obtaining the exhaust superheat degree according to the exhaust temperature detection value and the exhaust temperature correction value.
In an embodiment, after obtaining the exhaust temperature correction value according to the ambient temperature and the operating frequency of the compressor, the exhaust temperature detection value may be corrected by using the exhaust temperature correction value, and then the high pressure saturation temperature of the refrigerant is subtracted from the corrected exhaust temperature detection value, so as to calculate the corrected exhaust superheat degree. In addition, the exhaust gas superheat degree after correction can also be calculated by directly substituting the exhaust gas temperature detection value and the exhaust gas temperature correction value into a correlation formula.
In one embodiment, the correlation formula T may be utilizedDSH＝TP+TPCorrection-TChangeable pipeAnd obtaining the exhaust superheat degree according to the exhaust temperature detection value and the exhaust temperature correction value. In the above formula, TDSHIs the exhaust superheat degree, TP is the exhaust temperature detection value, TPCorrectionAs a correction value for the exhaust gas temperature, TChangeable pipeIs the temperature of the heat exchanger. Notably, in the cooling mode, TChangeable pipeFor the temperature of the outdoor heat exchanger, and in the heating mode, TChangeable pipeIs the temperature of the indoor heat exchanger.
In an embodiment, the corrected exhaust superheat calculated by using the above formula is closer to a true value than the exhaust superheat calculated by directly using the temperature value detected by the exhaust temperature sensor in the related art, so that the opening degree of the electric control valve can be accurately controlled in a subsequent step according to the corrected exhaust superheat.
And step S240, adjusting the opening of the electric control valve according to the exhaust superheat degree.
In one embodiment, after the exhaust superheat degree closer to the true value is calculated according to the exhaust temperature detection value and the exhaust temperature correction value, the opening degree of the electric control valve can be adjusted according to the exhaust superheat degree, so that the problem that the refrigerant circulation quantity does not conform to the actually required refrigerant circulation quantity is avoided, and the operation reliability of the air conditioner can be improved.
In an embodiment, the control method includes steps S210, S220, S230, and S240, when the air conditioner adjusts the opening degree of the electric control valve according to the exhaust superheat degree, the exhaust temperature detection value, the ambient temperature, and the compressor operating frequency may be obtained first, then the exhaust temperature correction value may be obtained according to the ambient temperature and the compressor operating frequency, and further the exhaust superheat degree closer to the true value may be obtained according to the exhaust temperature detection value and the exhaust temperature correction value, so that the opening degree of the electric control valve may be adjusted by using the exhaust superheat degree closer to the true value, a problem that a refrigerant circulation amount does not match an actually required refrigerant circulation amount is avoided, and thus the operation reliability of the air conditioner may be improved.
Additionally, referring to fig. 3, in an embodiment, step S220 may include, but is not limited to, the following steps:
step S310, obtaining an exhaust temperature deviation value according to the ambient temperature and the running frequency of the compressor;
and step S320, obtaining a corrected exhaust temperature value according to the ambient temperature, the compressor running frequency and the exhaust temperature deviation value.
In an embodiment, since the exhaust temperature detection value detected by the exhaust temperature sensor is not the true value of the exhaust temperature, the exhaust temperature detection value needs to be corrected properly, and since both the ambient temperature and the compressor operating frequency affect the exhaust temperature, the exhaust temperature offset value is obtained according to the ambient temperature and the compressor operating frequency, and then the exhaust temperature correction value associated with the ambient temperature and the compressor operating frequency is obtained according to the ambient temperature, the compressor operating frequency and the exhaust temperature offset value, so that the accurate exhaust superheat degree can be obtained in the subsequent steps.
In one embodiment, the resulting discharge air temperature offset value will vary as the ambient temperature and compressor operating frequency vary. In addition, the exhaust temperature offset values corresponding to different ambient temperatures and different compressor operating frequencies may be obtained by table lookup. As shown in fig. 4A and 4B, fig. 4A is a table of values for exhaust temperature offset values in a cooling mode in one embodiment, and fig. 4B is a table of values for exhaust temperature offset values in a heating mode in another embodiment.
As shown in fig. 4A, in the cooling mode, the ambient temperature may be divided into six temperature regions, which are a first temperature region equal to or lower than a first temperature value T1, a second temperature region greater than a first temperature value T1 and equal to or lower than a second temperature value T2, a third temperature region greater than a second temperature value T2 and equal to or lower than a third temperature value T3, a fourth temperature region greater than a third temperature value T3 and equal to or lower than a fourth temperature value T4, a fifth temperature region greater than a fourth temperature value T4 and equal to or lower than a fifth temperature value T5, and a sixth temperature region greater than a fifth temperature value T5, respectively. In addition, the compressor operation frequency can be divided into four frequency regions, which are a first frequency region smaller than the first frequency value F1, a second frequency region greater than or equal to the first frequency value F1 and smaller than the second frequency value F2, a third frequency region greater than or equal to the second frequency value F2 and smaller than the third frequency value F3, and a fourth frequency region greater than or equal to the third frequency value F3. The exhaust temperature offset value may have different values for different temperature regions and different frequency regions, and as shown in fig. 4A, the values of the exhaust temperature offset value are sequentially a first offset value Δ T1 to a twenty-fourth offset value Δ T24 that gradually increase in the direction from the first temperature region to the sixth temperature region and in the direction from the first frequency region to the fourth frequency region.
It should be noted that the first offset value Δ T1 to the twenty-fourth offset value Δ T24 may be appropriately selected according to practical applications, as long as the first offset value Δ T1 to the twenty-fourth offset value Δ T24 are gradually increased, and this embodiment is not particularly limited.
As shown in fig. 4B, in the heating mode, the ambient temperature may be divided into six temperature regions, which are a seventh temperature region equal to or lower than sixth temperature value T6, an eighth temperature region greater than sixth temperature value T6 and equal to or lower than seventh temperature value T7, a ninth temperature region greater than seventh temperature value T7 and equal to or lower than eighth temperature value T8, a tenth temperature region greater than eighth temperature value T8 and equal to or lower than ninth temperature value T9, an eleventh temperature region greater than ninth temperature value T9 and equal to or lower than tenth temperature value T10, and a twelfth temperature region greater than tenth temperature value T10, respectively. In addition, the compressor operating frequency may be divided into four frequency regions, which are a fifth frequency region less than the fourth frequency value F4, a sixth frequency region equal to or greater than the fourth frequency value F4 and less than the fifth frequency value F5, a seventh frequency region equal to or greater than the fifth frequency value F5 and less than the sixth frequency value F6, and an eighth frequency region equal to or greater than the sixth frequency value F6, respectively. The exhaust gas temperature offset value may have different values for different temperature regions and different frequency regions, and as shown in fig. 4B, the values of the exhaust gas temperature offset value are sequentially twenty-fifth to forty-eighth offset values Δ T25 to Δ T48 that gradually increase in the direction from the seventh to twelfth temperature regions and in the direction from the fifth to eighth frequency regions.
It should be noted that the twenty-fifth offset value Δ T25 to the forty-eighth offset value Δ T48 may be appropriately selected according to practical applications, as long as the requirement of gradually increasing from the twenty-fifth offset value Δ T25 to the forty-eighth offset value Δ T48 is satisfied, and this embodiment is not particularly limited.
Additionally, in one embodiment, the discharge temperature correction value may be derived from the ambient temperature, the compressor operating frequency, and the discharge temperature offset value using the following equation:
TPcorrection＝a*Fx+b*TOuter cover+ΔT
Wherein, TPCorrectionFor exhaust temperature correction, Fx is compressor operating frequency, TOuter coverFor the ambient temperature, Δ T is the exhaust temperature offset value, and a and b are weighting coefficients, respectively.
In one embodiment, the exhaust temperature correction value calculated by using the formula related to the ambient temperature and the compressor operation frequency can reduce the influence of the ambient temperature and the compressor operation frequency on the calculated exhaust temperature, so that an accurate exhaust temperature correction value can be obtained.
In an embodiment, the weighting factor a and the weighting factor b may take different values according to different operating frequencies of the compressor, and the weighting factor a and the weighting factor b corresponding to different operating frequencies of the compressor may be obtained by a table lookup. As shown in fig. 5, fig. 5 is a table of values of the weighting factor a and the weighting factor b at different operating frequencies of the compressor in one embodiment. In the value-taking table shown in fig. 5, the compressor operating frequency can be divided into four frequency regions, which are a first frequency region smaller than the first frequency value F1, a second frequency region greater than or equal to the first frequency value F1 and smaller than the second frequency value F2, a third frequency region greater than or equal to the second frequency value F2 and smaller than the third frequency value F3, and a fourth frequency region greater than or equal to the third frequency value F3. In the refrigeration mode, in the direction from the first frequency region to the fourth frequency region, the values of the weight coefficient a are a first frequency weight value a1 to a fourth frequency weight value a4 which are gradually increased in sequence, and the values of the weight coefficient b are a first temperature weight value b1 to a fourth temperature weight value b4 which are gradually increased in sequence; in the heating mode, in a direction from the first frequency region to the fourth frequency region, the weight coefficient a sequentially takes a gradually increasing first frequency weight value a1 to a fourth frequency weight value a4, and the weight coefficient b sequentially takes a gradually increasing first temperature weight value b1 to a fourth temperature weight value b 4.
It should be noted that, the first frequency weight value a1, the second frequency weight value a2, the third frequency weight value a3, and the fourth frequency weight value a4, and the first temperature weight value b1, the second temperature weight value b2, the third temperature weight value b3, and the fourth temperature weight value b4 may be appropriately selected according to the actual application, as long as the requirements that the first frequency weight value a1 is gradually increased to the fourth frequency weight value a4, and the first temperature weight value b1 is gradually increased to the fourth temperature weight value b4 are met, which is not particularly limited in this embodiment.
Additionally, referring to fig. 6, in an embodiment, step S240 may include, but is not limited to, the following steps:
step S610, acquiring once exhaust superheat degree at intervals of first time, and comparing the exhaust superheat degree with a first superheat degree threshold value to obtain a first comparison result;
and S620, adjusting the opening of the electric control valve according to the first comparison result.
In one embodiment, after the corrected exhaust superheat degree is obtained, the corrected exhaust superheat degree is compared with a first superheat degree threshold value to obtain a first comparison result, and then the opening degree of the electronic control valve is adjusted according to the first comparison result, so that the problem that the refrigerant circulation quantity does not conform to the actually required refrigerant circulation quantity can be avoided, and the operation reliability of the air conditioner can be improved. In addition, after the opening degree of the electric control valve is adjusted, the refrigerant circulation quantity can be correspondingly adjusted, and the adjusted refrigerant circulation quantity can influence the exhaust superheat degree, so that the corrected exhaust superheat degree is obtained at first intervals, and the exhaust superheat degree is compared with the first superheat degree threshold value every time the corrected exhaust superheat degree is obtained, the opening degree of the electric control valve can be adjusted in real time, and the air conditioner can keep good operation reliability in the operation process.
In an embodiment, the first superheat threshold may be appropriately selected according to the actual application, and this embodiment is not particularly limited to this.
In one embodiment, the first time may take different values depending on the operating frequency of the compressor. FIG. 7 is a table of values taken for a first time at different compressor operating frequencies, in one embodiment, as shown in FIG. 7. In the value-taking table shown in fig. 7, the operating frequency of the compressor may be divided into three frequency regions, which are a first frequency region equal to or lower than the first frequency value F1, a second frequency region greater than the first frequency value F1 and equal to or lower than the second frequency value F2, and a third frequency region greater than the second frequency value F2. In the direction from the first frequency region to the third frequency region, the first time is gradually increased in value, namely, a first interval time Tm1, a second interval time Tm2 and a third interval time Tm 3.
It should be noted that the first interval time Tm1, the second interval time Tm2, and the third interval time Tm3 may be selected according to practical applications, as long as the first interval time Tm1 and the third interval time Tm3 gradually increase, and this embodiment is not limited in particular.
Additionally, referring to fig. 8, in an embodiment, step S620 may include, but is not limited to, the following steps:
and step S810, when the exhaust superheat degree is smaller than a first superheat degree threshold value in the first comparison results of more than two consecutive times, reducing the opening degree of the electric control valve until the exhaust superheat degree is larger than or equal to the first superheat degree threshold value.
In one embodiment, if the first comparison result is a case where the degree of superheat of the exhaust gas is less than the first degree of superheat threshold value only once, the case may be an occasional result due to unstable operation of the air conditioner, and in order to avoid such an erroneous determination, it is necessary to determine that the same comparison result occurs twice in succession. When the first comparison results of more than two consecutive times are that the exhaust superheat degree is smaller than the first superheat degree threshold value, the current exhaust superheat degree is too small, and the refrigerant circulation quantity is too large, so that the refrigerant circulation quantity can be reduced by reducing the opening degree of the electric control valve, when the refrigerant circulation quantity is reduced, the refrigerant flowing into the compressor is correspondingly reduced, the exhaust superheat degree can be improved, and when the exhaust superheat degree is increased to be larger than or equal to the first superheat degree threshold value, the current exhaust superheat degree is proper, and therefore the operation reliability of the air conditioner can be maintained.
In one embodiment, different opening step values may be selected to reduce the opening of the electrically controlled valve depending on the ambient temperature. As shown in fig. 9, fig. 9 is a table for taking values of opening step values at different ambient temperatures in one embodiment. In the value-taking table shown in fig. 9, the ambient temperature may be divided into three temperature regions, which are a thirteenth temperature region equal to or lower than the first temperature threshold Tw1, a fourteenth temperature region greater than the first temperature threshold Tw1 and equal to or lower than the second temperature threshold Tw2, and a fifteenth temperature region greater than the second temperature threshold Tw2, respectively. In the direction from the thirteenth temperature region to the fifteenth temperature region, the opening degree step values are a first step value a1, a second step value B1 and a third step value C1 which are gradually increased.
It should be noted that the first step value a1, the second step value B1, and the third step value C1 may be selected according to practical applications, as long as the gradual increase from the first step value a1 to the third step value C1 is satisfied, which is not limited in this embodiment.
In an embodiment, the opening step value for reducing the opening of the electric control valve may have different values according to different operation modes of the air conditioner. For example, the opening degree step value in the cooling mode and the opening degree step value in the heating mode may be different values, and may be appropriately selected according to the actual application, which is not specifically limited in this embodiment.
In addition, in an embodiment, step S620 may further include, but is not limited to, the following steps:
and step S820, when the first comparison result shows that the exhaust superheat degree is larger than or equal to the first superheat degree threshold value, keeping the current opening degree of the electric control valve unchanged.
In an embodiment, when the first comparison result indicates that the exhaust superheat is greater than or equal to the first superheat threshold, the current exhaust superheat is appropriate, so that the current opening of the electronic control valve can be kept unchanged, the current refrigerant circulation amount is stabilized, and the operation reliability of the air conditioner is kept.
In addition, referring to fig. 10, in an embodiment, step S620 may further include, but is not limited to, the following steps:
step S1010, in the process of reducing the opening of the electric control valve, acquiring the exhaust superheat degree at intervals of a second time, and comparing the exhaust superheat degree with a second superheat degree threshold value to obtain a second comparison result;
and step S1020, adjusting the opening of the electric control valve according to the second comparison result.
In one embodiment, in the process of reducing the opening degree of the electric control valve, the corrected exhaust superheat degree is obtained at intervals of a second time, and when the corrected exhaust superheat degree is obtained each time, the second comparison result is obtained by comparing the corrected exhaust superheat degree with a second superheat degree threshold value, and then the opening degree of the electric control valve is adjusted according to the second comparison result, so that the problem that the refrigerant circulation quantity does not conform to the actually required refrigerant circulation quantity in the process of reducing the opening degree of the electric control valve can be avoided, and the operation reliability of the air conditioner can be improved. In addition, after the opening degree of the electric control valve is adjusted, the refrigerant circulation quantity can be correspondingly adjusted, and the adjusted refrigerant circulation quantity can influence the exhaust superheat degree, so that the corrected exhaust superheat degree is obtained every second time interval, and the exhaust superheat degree is compared with a second superheat degree threshold value every time the corrected exhaust superheat degree is obtained, the opening degree of the electric control valve can be adjusted in real time, and the air conditioner can keep good operation reliability in the operation process.
In an embodiment, the second superheat threshold may be appropriately selected according to the actual application, and this embodiment is not particularly limited to this.
In one embodiment, the second time may take different values depending on the operating frequency of the compressor. FIG. 11 is a table of values taken for the second time at different compressor operating frequencies in one embodiment, as shown in FIG. 11. In the value-taking table shown in fig. 11, the compressor operating frequency may be divided into three frequency regions, which are a first frequency region equal to or lower than the first frequency value F1, a second frequency region greater than the first frequency value F1 and equal to or lower than the second frequency value F2, and a third frequency region greater than the second frequency value F2. In the direction from the first frequency region to the third frequency region, the first time values are a fourth interval time Tm4, a fifth interval time Tm5, and a sixth interval time Tm6 which are gradually increased in order.
It should be noted that the fourth interval time Tm4, the fifth interval time Tm5, and the sixth interval time Tm6 may be selected according to practical applications, as long as the fourth interval time Tm4 and the sixth interval time Tm6 are gradually increased, and the present embodiment is not limited thereto.
In an embodiment, the second time may have a different value for different operation modes of the air conditioner. For example, the second time in the cooling mode and the second time in the heating mode may be different values, and may be appropriately selected according to the actual application, which is not specifically limited in this embodiment.
Additionally, referring to fig. 12, in an embodiment, step S1020 may include, but is not limited to, the following steps:
and step S1210, when the second comparison results of more than two consecutive times are that the exhaust superheat degree is greater than the second superheat degree threshold, increasing the opening degree of the electric control valve until the exhaust superheat degree is less than or equal to the second superheat degree threshold and is greater than or equal to the first superheat degree threshold.
In one embodiment, if the second comparison result is that the degree of superheat of the exhaust gas is greater than the second degree of superheat threshold value only once, the second comparison result may be an occasional result due to unstable operation of the air conditioner, and in order to avoid such an erroneous determination, it is necessary to determine that the same comparison result occurs twice in succession. When the second comparison results of more than two consecutive times are that the exhaust superheat is larger than the second superheat threshold, the current exhaust superheat is too large, and the refrigerant circulation quantity is too small, so that the refrigerant circulation quantity can be increased by increasing the opening degree of the electric control valve, when the refrigerant circulation quantity is increased, the refrigerant flowing into the compressor is correspondingly increased, the exhaust superheat can be reduced, and when the exhaust superheat is reduced to be smaller than or equal to the second superheat threshold and larger than or equal to the first superheat threshold, the current exhaust superheat is proper, so that the operation reliability of the air conditioner can be maintained.
In one embodiment, different opening step values may be selected to increase the opening of the electrically controlled valve depending on the ambient temperature. As shown in fig. 13, fig. 13 is a table of values of opening step values at different ambient temperatures in one embodiment. In the value-taking table shown in fig. 13, the ambient temperature may be divided into three temperature regions, which are a sixteenth temperature region equal to or lower than the third temperature threshold Tw3, a seventeenth temperature region greater than the third temperature threshold Tw3 and equal to or lower than the fourth temperature threshold Tw4, and an eighteenth temperature region greater than the fourth temperature threshold Tw4, respectively. In the direction from the sixteenth temperature region to the eighteenth temperature region, the opening degree step values are a fourth step value a2, a fifth step value B2 and a sixth step value C2 which are gradually increased.
It should be noted that the fourth step value a2, the fifth step value B2, and the sixth step value C2 may be selected according to practical applications, as long as the gradual increase from the fourth step value a2 to the sixth step value C2 is satisfied, which is not limited in this embodiment.
In an embodiment, the opening step value for increasing the opening of the electric control valve may have different values according to different operation modes of the air conditioner. For example, the opening degree step value in the cooling mode and the opening degree step value in the heating mode may be different values, and may be appropriately selected according to the actual application, which is not specifically limited in this embodiment.
In addition, in an embodiment, step S1020 may further include, but is not limited to, the following steps:
and step S1220, when the second comparison result shows that the exhaust superheat degree is less than or equal to the second superheat degree threshold value and greater than or equal to the first superheat degree threshold value, keeping the current opening degree of the electric control valve unchanged.
In an embodiment, when the second comparison result is that the exhaust superheat degree is less than or equal to the second superheat degree threshold and greater than or equal to the first superheat degree threshold, it is determined that the current exhaust superheat degree is appropriate, so that the current opening degree of the electronic control valve can be kept unchanged, the current refrigerant circulation amount is stabilized, and the operation reliability of the air conditioner is kept.
In addition, another embodiment of the present invention also provides a control apparatus of an air conditioner, including: a memory, a processor, and a computer program stored on the memory and executable on the processor.
The processor and memory may be connected by a bus or other means.
The memory, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the processor, and these remote memories may be connected to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
It should be noted that the control device of the air conditioner in this embodiment may be applied to the system architecture platform in the embodiment shown in fig. 1 to implement the control method in the above method embodiment, and therefore, the control device in this embodiment may have at least the following technical effects: when the opening of the electric control valve is adjusted according to the exhaust superheat degree, an exhaust temperature detection value, an ambient temperature and a compressor operation frequency are firstly obtained, then an exhaust temperature correction value is obtained according to the ambient temperature and the compressor operation frequency, and further the exhaust superheat degree closer to a true value can be obtained according to the exhaust temperature detection value and the exhaust temperature correction value, so that the opening of the electric control valve can be adjusted by utilizing the exhaust superheat degree closer to the true value, the problem that the refrigerant circulation quantity does not accord with the actually required refrigerant circulation quantity can be avoided, and the operation reliability of the air conditioner can be improved.
The non-transitory software programs and instructions required to implement the control method of the above-described embodiment are stored in the memory, and when executed by the processor, perform the control method of the above-described embodiment, for example, the method steps S210 to S240 in fig. 2, the method steps S310 to S320 in fig. 3, the method steps S610 to S620 in fig. 6, the method step S810 in fig. 8, the method steps S1010 to S1020 in fig. 10, and the method step S1210 in fig. 12 described above.
In addition, another embodiment of the invention also provides an air conditioner, which comprises the control device in any one of the above embodiments.
Since the air conditioner in this embodiment has the control device in any of the above embodiments, the air conditioner in this embodiment may call the control program stored in the memory by using the processor in the control device in the above embodiments to implement the control method of the air conditioner.
When the air conditioner executes the control method, when the opening of the electric control valve is adjusted according to the exhaust superheat degree, the exhaust temperature detection value, the ambient temperature and the compressor operation frequency are firstly obtained, then the exhaust temperature correction value is obtained according to the ambient temperature and the compressor operation frequency, and further the exhaust superheat degree closer to the true value can be obtained according to the exhaust temperature detection value and the exhaust temperature correction value, so that the opening of the electric control valve can be adjusted by utilizing the exhaust superheat degree closer to the true value, the problem that the refrigerant circulation quantity does not accord with the actually required refrigerant circulation quantity can be avoided, and the operation reliability can be improved.
The above described terminal embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Furthermore, another embodiment of the present invention provides a computer-readable storage medium, which stores computer-executable instructions, which are executed by a processor or a controller, for example, by a processor in the above-mentioned apparatus embodiment, and can enable the processor to execute the control method in the above-mentioned embodiment, for example, execute the above-mentioned method steps S210 to S240 in fig. 2, method steps S310 to S320 in fig. 3, method steps S610 to S620 in fig. 6, method step S810 in fig. 8, method steps S1010 to S1020 in fig. 10, and method step S1210 in fig. 12.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (13)
1. A method of controlling an air conditioner, comprising:
acquiring a discharge temperature detection value, an ambient temperature and a compressor running frequency;
obtaining a discharge temperature correction value according to the environment temperature and the compressor running frequency;
obtaining the exhaust superheat degree according to the exhaust temperature detection value and the exhaust temperature correction value;
and adjusting the opening of the electric control valve according to the exhaust superheat degree.
2. The control method of claim 1, wherein said deriving a discharge temperature correction based on said ambient temperature and said compressor operating frequency comprises:
obtaining a discharge temperature deviation value according to the environment temperature and the running frequency of the compressor;
and obtaining a corrected exhaust temperature value according to the ambient temperature, the compressor running frequency and the exhaust temperature deviation value.
3. The control method of claim 2, wherein said deriving a discharge temperature correction value based on said ambient temperature, said compressor operating frequency, and said discharge temperature offset value comprises,
the exhaust temperature correction value is obtained according to the following formula:
TPcorrection＝a*Fx+b*TOuter cover+ΔT
Wherein, TPCorrectionThe corrected value of the exhaust temperature is obtained; fx is the compressor operating frequency; t isOuter coverIs the ambient temperature; Δ T is the exhaust temperature offset value; a and b are weight coefficients, respectively.
4. The control method according to claim 3, wherein said obtaining an exhaust superheat based on said exhaust temperature detection value and said exhaust temperature correction value includes,
the degree of superheat of the exhaust gas is obtained according to the following formula:
TDSH＝TP+TPcorrection-TChangeable pipe
Wherein, TDSHThe degree of superheat of the exhaust gas is; TP is the exhaust temperature detection value; t isChangeable pipeIs the temperature of the heat exchanger.
5. The control method according to any one of claims 1 to 4, wherein the adjusting of the opening degree of the electrically controlled valve according to the degree of superheat of the exhaust gas includes:
acquiring the exhaust superheat degree once every first interval time, and comparing the exhaust superheat degree with a first superheat degree threshold value to obtain a first comparison result;
and adjusting the opening of the electric control valve according to the first comparison result.
6. The control method according to claim 5, wherein the adjusting the opening degree of the electrically controlled valve according to the first comparison result includes:
and when the exhaust superheat degree is smaller than a first superheat degree threshold value in the first comparison results of more than two consecutive times, reducing the opening degree of the electric control valve until the exhaust superheat degree is larger than or equal to the first superheat degree threshold value.
7. The control method according to claim 6, wherein the adjusting the opening degree of the electrically controlled valve according to the first comparison result further comprises:
and when the first comparison result shows that the exhaust superheat degree is larger than or equal to a first superheat degree threshold value, keeping the current opening degree of the electric control valve unchanged.
8. The control method according to claim 6, wherein the adjusting the opening degree of the electrically controlled valve according to the first comparison result further comprises:
in the process of reducing the opening degree of the electric control valve, acquiring the exhaust superheat degree once every second time interval, and comparing the exhaust superheat degree with a second superheat degree threshold value to obtain a second comparison result;
and adjusting the opening of the electric control valve according to the second comparison result.
9. The control method according to claim 8, wherein the adjusting the opening degree of the electrically controlled valve according to the second comparison result includes:
and when the second comparison results of more than two consecutive times are that the exhaust superheat degree is greater than a second superheat degree threshold value, increasing the opening degree of the electric control valve until the exhaust superheat degree is less than or equal to the second superheat degree threshold value and is greater than or equal to a first superheat degree threshold value.
10. The control method according to claim 8, wherein the adjusting the opening degree of the electrically controlled valve according to the second comparison result further comprises:
and when the second comparison result shows that the exhaust superheat degree is less than or equal to a second superheat degree threshold value and greater than or equal to a first superheat degree threshold value, keeping the current opening degree of the electric control valve unchanged.
11. A control apparatus of an air conditioner, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the control method according to any one of claims 1 to 10 when executing the computer program.
12. An air conditioner characterized by comprising the control device as claimed in claim 11.
13. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the control method according to any one of claims 1 to 10.
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