CN111351175A - Control method and device for refrigeration at high temperature, air conditioner and storage medium - Google Patents

Control method and device for refrigeration at high temperature, air conditioner and storage medium Download PDF

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CN111351175A
CN111351175A CN202010207073.3A CN202010207073A CN111351175A CN 111351175 A CN111351175 A CN 111351175A CN 202010207073 A CN202010207073 A CN 202010207073A CN 111351175 A CN111351175 A CN 111351175A
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compressor
frequency
temperature
laboratory
outdoor environment
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尹翔天
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Thermal Sciences (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a control method and device for refrigeration at high temperature, an air conditioner and a storage medium, wherein the method comprises the following steps: acquiring the outdoor environment temperature; and determining the compressor frequency corresponding to the outdoor environment temperature according to the corresponding relation between the outdoor environment temperature and the compressor frequency, wherein the plurality of different compressor frequencies respectively corresponding to the plurality of different outdoor environment temperatures which are changed in a linear mode are changed in a non-linear mode. The invention can determine the proper compressor frequency corresponding to the current outdoor environment temperature, so that the frequency of the air conditioner compressor can be adjusted along with the change of the outdoor environment temperature, wherein the frequency of each compressor and the corresponding outdoor environment temperature are in a nonlinear relation, which is different from the prior fixed linear relation between the frequency of each compressor and the outdoor environment temperature, and the invention can ensure that the compressor always runs at the optimal frequency along with the change of the outdoor environment temperature, thereby ensuring that the air conditioner can exert the maximum performance, improving the energy efficiency, saving the energy consumption, and simultaneously improving the refrigeration effect and the comfortable feeling of users of the air conditioner.

Description

Control method and device for refrigeration at high temperature, air conditioner and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device for refrigeration at high temperature, an air conditioner and a storage medium.
Background
With the increasing requirements of people on air conditioning systems, the traditional air conditioner can not meet the market demands, especially for variable frequency air conditioning units. During the actual use of the inverter air conditioning unit, for example, when the inverter air conditioning unit performs cooling operation at a high temperature, the high pressure of the air conditioner gradually increases with the increase of the outdoor environment temperature, which may cause a protective shutdown due to an overhigh high pressure.
At present, a high-temperature refrigeration control performance curve of a frequency converter adopts two-point linear logic, namely a frequency point of a starting point temperature of a high-temperature area and a frequency point of the highest operation temperature are determined, the frequency of the temperature point between the two points adopts a slope calculation method to determine the highest operation frequency, but once the numerical values of the two ends are determined, the frequency of a middle area is also determined and cannot be adjusted, the performance of the whole frequency converter cannot be completely utilized, energy consumption is wasted, the refrigeration effect is reduced, and the use experience of a user is poor.
Disclosure of Invention
The invention solves the problem of how to reasonably control the frequency of the compressor when the air conditioner operates at high temperature so as to improve the performance of the whole machine, reduce the energy consumption of the air conditioner, ensure the refrigeration effect of the air conditioner and improve the use experience of users.
In order to solve the above problem, in a first aspect, the present invention provides a method for controlling refrigeration at high temperature, including:
acquiring the outdoor environment temperature;
and determining the compressor frequency corresponding to the outdoor environment temperature according to the corresponding relation between the outdoor environment temperature and the compressor frequency, wherein the plurality of different compressor frequencies respectively corresponding to the plurality of different outdoor environment temperatures which are changed in a linear mode are changed in a non-linear mode.
In the using process of the air conditioner, firstly, the outdoor environment temperature is obtained in real time, then the compressor frequency corresponding to the outdoor environment temperature is determined according to the corresponding relation between the outdoor environment temperature and the compressor frequency, so that the corresponding proper compressor frequency is determined based on the outdoor environment temperature obtained in real time, the current compressor frequency of the air conditioner can be adjusted along with the change of the outdoor environment temperature obtained in real time, wherein a plurality of compressor frequencies and a plurality of corresponding outdoor environment temperatures are in nonlinear relation, which is different from the existing linear relation that each compressor frequency and the outdoor environment temperature are fixed, different compressor frequencies can be obtained through experiments before leaving a factory or obtained according to actual operation parameters in the actual operation process of the air conditioner, and further, the air conditioner can be ensured to operate at the optimal compressor frequency along with the change of the outdoor environment temperature, the air conditioner can exert the maximum performance, so that the energy efficiency is improved, the energy consumption is saved, the refrigeration effect of the air conditioner is improved, and the use experience of a user is improved.
Further, the determining the compressor frequency corresponding to the outdoor environment temperature includes:
a plurality of different compressor frequencies are in a decreasing trend as a plurality of different outdoor ambient temperatures are in an increasing trend.
In the use process of the air conditioner, the outdoor environment temperature can be gradually increased or gradually reduced along with the increase of the working time, when the outdoor environment temperatures are in increasing trend, the frequencies of the different compressors corresponding to the outdoor environment temperatures are in decreasing trend, and the air conditioner can be ensured to always run at the optimal compressor frequency along with the change of the outdoor environment temperature, so that the air conditioner can be ensured to exert the maximum performance, the energy efficiency is improved, the energy consumption is saved, and the refrigeration effect of the air conditioner and the comfortable experience of a user can be improved.
Further, the determining of the corresponding relationship between the outdoor environment temperature and the compressor frequency includes:
setting a plurality of laboratory environment temperatures, and determining the laboratory environment temperatures respectively matched with the plurality of laboratory environment temperatures;
and determining compressor frequencies respectively corresponding to the plurality of laboratory outdoor environment temperatures according to the laboratory environment temperatures, and taking the plurality of laboratory outdoor environment temperatures and the compressor frequencies respectively corresponding to the laboratory outdoor environment temperatures as the corresponding relation between the outdoor environment temperatures and the compressor frequencies.
Therefore, by setting a plurality of laboratory environment temperatures, determining the laboratory environment temperatures respectively matched with the plurality of laboratory environment temperatures, determining the compressor frequencies respectively corresponding to the plurality of laboratory environment temperatures according to the laboratory environment temperatures, and finally taking the plurality of laboratory environment temperatures and the compressor frequencies respectively corresponding to the plurality of laboratory environment temperatures as the corresponding relations between the outdoor environment temperatures and the compressor frequencies, the corresponding relations between the outdoor environment temperatures and the compressor frequencies can be inquired through the outdoor environment temperatures acquired in real time when the air conditioner runs, so as to determine the compressor frequencies corresponding to the outdoor environment temperatures, so that the current compressor frequency of the air conditioner can be adjusted along with the change of the outdoor environment temperatures acquired in real time, wherein the plurality of compressor frequencies and the plurality of corresponding outdoor environment temperatures are in a nonlinear relation, which is different from the existing linear relation that each compressor frequency and the outdoor environment temperature are fixed, different compressor frequencies can be obtained through experiments before leaving factories or obtained according to actual operation parameters in the actual operation process of the air conditioner, so that the air conditioner can be ensured to always operate at the optimal compressor frequency along with the change of the outdoor environment temperature, the maximum performance of the air conditioner can be ensured, the energy efficiency is improved, the energy consumption is saved, and the operation effect of the air conditioner and the comfort of a user are ensured.
Further, the determining, according to the laboratory ambient temperature, the compressor frequencies corresponding to the plurality of laboratory ambient temperatures respectively includes:
starting a refrigeration mode under the condition of the environmental temperature in each laboratory to obtain the system pressure, the current and the compressor operation frequency in the air conditioner operation process;
adjusting the compressor operating frequency;
and determining the maximum compressor frequency corresponding to the laboratory environment temperature according to the system pressure, the current and the compressor running frequency, and taking the maximum compressor frequency as the compressor frequency corresponding to the laboratory environment temperature matched with the laboratory environment temperature.
Therefore, the refrigeration mode is started under the condition of the ambient temperature in each laboratory, then the running frequency of the compressor is regulated, then the maximum compressor frequency corresponding to the ambient temperature in each laboratory is determined according to the system pressure, the current and the running frequency of the compressor in the running process of the air conditioner which are obtained in real time, finally the maximum compressor frequency is used as the compressor frequency corresponding to the outdoor ambient temperature of each laboratory which is matched with the ambient temperature in each laboratory, so that the corresponding relation between the outdoor ambient temperature and the compressor frequency is determined, the corresponding relation between the outdoor ambient temperature and the compressor frequency can be inquired through the outdoor ambient temperature which is obtained in real time when the air conditioner runs, so as to determine the compressor frequency corresponding to the outdoor ambient temperature, and the current compressor frequency of the air conditioner can be regulated along with the change of the outdoor ambient temperature which is obtained in real time, the frequency of the compressor and the corresponding outdoor environment temperature are in a nonlinear relation, and the nonlinear relation is different from the existing linear relation that the frequency of each compressor and the outdoor environment temperature are fixed.
Further, the adjusting the compressor operating frequency comprises:
adjusting the compressor operating frequency at a preset rate;
maintaining the adjusted compressor operating frequency unchanged when the adjusted compressor operating frequency is less than or equal to a preset compressor frequency.
In the process of adjusting the running frequency of the compressor, firstly adjusting the running frequency of the compressor at a preset rate, and then determining whether to keep the adjusted running frequency of the compressor according to the relationship between the adjusted running frequency of the compressor and the preset frequency of the compressor, so as to ensure that the adjusted running frequency of the compressor ensures that the air conditioner can exert the maximum performance, further improve the energy efficiency, achieve the effect of saving energy consumption, simultaneously ensure the refrigeration effect of the air conditioner, and meet the comfortable experience of a user.
Further, the determining the maximum compressor frequency corresponding to the indoor environment temperature according to the system pressure, the current and the compressor operation frequency includes:
and when the system pressure is less than or equal to a preset system pressure, the current is less than or equal to a preset current, and the adjusted compressor running frequency is not changed any more within a continuous preset time, taking the adjusted compressor running frequency as the maximum compressor frequency corresponding to the indoor environment temperature.
Therefore, whether the adjusted running frequency of the compressor is used as the maximum compressor frequency corresponding to the current environmental temperature in the laboratory is determined according to the relation between the system pressure and the preset system pressure, the relation between the current and the preset current and the change condition of the adjusted running frequency of the compressor within a period of time, so that the air conditioner can exert the maximum performance when the refrigeration mode is started under the condition of the current environmental temperature in the laboratory, the energy efficiency is further improved, the energy consumption is saved, and meanwhile, the refrigeration effect of the air conditioner and the comfort level of a user can be guaranteed.
Further, the outdoor environment temperature of the plurality of laboratories is greater than or equal to the starting point temperature of the preset air-conditioning high-temperature area and less than or equal to the ending point temperature of the preset air-conditioning high-temperature area.
Therefore, by selecting a plurality of laboratory outdoor environment temperatures in the range between the starting point temperature of the preset air-conditioning high-temperature area and the end point temperature of the preset air-conditioning high-temperature area, determining the laboratory environment temperatures respectively matched with the laboratory outdoor environment temperatures according to the laboratory environment temperatures, determining the compressor frequencies respectively corresponding to the laboratory outdoor environment temperatures according to the laboratory environment temperatures, and finally taking the laboratory outdoor environment temperatures and the compressor frequencies respectively corresponding to the laboratory environment temperatures as the corresponding relation between the outdoor environment temperatures and the compressor frequencies, the corresponding relation between the outdoor environment temperatures and the compressor frequencies can be inquired through the outdoor environment temperatures acquired in real time when the air conditioner runs, so as to determine the compressor frequencies corresponding to the outdoor environment temperatures, and the current compressor frequency of the air conditioner can be adjusted along with the change of the outdoor environment temperatures acquired in real time, the invention is characterized in that the frequencies of the plurality of compressors and the corresponding outdoor environment temperatures are in a nonlinear relation, and the nonlinear relation is different from the existing linear relation that the frequencies of the compressors and the outdoor environment temperatures are fixed.
In a second aspect, the present invention further provides a control device for refrigeration at high temperature, including:
an acquisition unit for acquiring an outdoor ambient temperature;
and the processing unit is used for determining the compressor frequency corresponding to the outdoor environment temperature according to the corresponding relation between the outdoor environment temperature and the compressor frequency, wherein the plurality of different compressor frequencies respectively corresponding to the plurality of different outdoor environment temperatures which are linearly changed are nonlinearly changed.
The control device for refrigeration at high temperature is used for realizing the control method for refrigeration at high temperature, so that the control device has at least all technical effects of the control method for refrigeration at high temperature.
In a third aspect, the present invention also provides an air conditioner, including a computer readable storage medium storing a computer program and a processor, wherein when the computer program is read and executed by the processor, the control method for cooling at high temperature as described above is implemented.
The technical scheme of the air conditioner at least comprises all the technical schemes of the control method for refrigerating at high temperature, so that the control method at least has all the technical effects of the control method for refrigerating at high temperature.
In a fourth aspect, the present invention also provides a computer-readable storage medium storing a computer program which, when read and executed by a processor, implements the control method of cooling at high temperature as described above.
The technical scheme of the computer readable storage medium at least comprises all technical schemes of the control method for refrigerating at high temperature, so that the technical effects of the control method for refrigerating at high temperature are at least achieved.
Drawings
FIG. 1 is a schematic flow chart of a method for controlling refrigeration at high temperature according to an embodiment of the present invention;
fig. 2 is a block diagram of a control device for cooling at high temperature according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It should be noted that in the following description, suffixes such as "module", "component", or "unit" used to indicate elements are used only for facilitating the description of the present invention, and have no specific meaning in themselves. Thus, "module", "component" or "unit" may be used mixedly. The meaning of "a plurality" is one or more than one.
With the improvement of chip technology, the memory address can completely meet the requirement of accurate control. When the variable frequency air conditioner refrigerates at high temperature, the invention provides a control method and device for refrigerating at high temperature, an air conditioner and a storage medium, in order to improve the precision of the adjustment of the current compressor frequency of the air conditioner along with the change of the outdoor environment temperature, further reasonably control the compressor frequency, improve the performance of the whole machine, reduce the energy consumption of the air conditioner and simultaneously ensure the refrigerating operation effect and the comfort degree of a user of the air conditioner.
As shown in fig. 1, a method for controlling refrigeration at high temperature according to an embodiment of the present invention includes the following steps:
s10: and acquiring the outdoor environment temperature.
S20: and determining the compressor frequency corresponding to the outdoor environment temperature according to the corresponding relation between the outdoor environment temperature and the compressor frequency, wherein the plurality of different compressor frequencies respectively corresponding to the plurality of different outdoor environment temperatures which are changed in a linear mode are changed in a non-linear mode.
The outdoor ambient temperature is defined as T, and the compressor frequency corresponding to the outdoor ambient temperature T is defined as F. The corresponding relation between the outdoor environment temperature and the compressor frequency can be written into an electric control device of the air conditioner in advance before the air conditioner leaves a factory, and the corresponding relation can be measured in a laboratory according to different types of the air conditioner.
Specifically, an outdoor ambient temperature sensor may be disposed on an outdoor unit main control panel of the air conditioner, and the outdoor ambient temperature sensor is configured to acquire an outdoor ambient temperature T in real time. Under the high-temperature condition (for example, summer), after the air conditioner is powered on, a user can search the corresponding relation between the outdoor environment temperature and the compressor frequency in the electric control device of the air conditioner according to the outdoor environment temperature T acquired in real time after the refrigeration mode is started through the air conditioner remote controller, so that the compressor frequency F corresponding to the outdoor environment temperature T can be determined, then the compressor operation frequency of the air conditioner is adjusted to the compressor frequency F corresponding to the outdoor environment temperature T, and the compressor frequency of the air conditioner can be adjusted along with the change of the working environment of the air conditioner.
Although a plurality of continuous outdoor ambient temperatures T are linearly changed, different compressor frequencies F corresponding to the respective outdoor ambient temperatures T are nonlinearly changed in order to fully utilize the performance of the entire apparatus. That is, unlike the linear relationship control method in which the outdoor ambient temperature and the compressor frequency are fixed when the existing air conditioner operates in the high temperature region, the nonlinear relationship between the outdoor ambient temperature and the compressor frequency in this embodiment takes full advantage of the performance of the air conditioner into consideration, and performs more precise nonlinear control.
In this embodiment, during the use of the air conditioner, the outdoor environment temperature is obtained in real time, and then the compressor frequency corresponding to the outdoor environment temperature is determined according to the corresponding relationship between the outdoor environment temperature and the compressor frequency, so as to determine the corresponding suitable compressor frequency based on the outdoor environment temperature obtained in real time, so that the current compressor frequency of the air conditioner can be adjusted according to the change of the outdoor environment temperature obtained in real time, wherein the multiple compressor frequencies and the multiple corresponding outdoor environment temperatures have a non-linear relationship, which is different from the existing linear relationship that each compressor frequency and the outdoor environment temperature are fixed, in the present invention, different compressor frequencies can be obtained through experiments before leaving a factory or obtained according to actual operation parameters during the actual operation of the air conditioner, so as to ensure that the air conditioner can always operate at the optimal compressor frequency along with the change of the outdoor environment temperature, the air conditioner can exert the maximum performance, so that the energy efficiency is improved, the energy consumption is saved, the refrigeration effect of the air conditioner is improved, and the use experience of a user is improved.
Optionally, the determining the compressor frequency corresponding to the outdoor ambient temperature includes:
a plurality of different compressor frequencies are in a decreasing trend as a plurality of different outdoor ambient temperatures are in an increasing trend.
Specifically, the corresponding relationship between the outdoor environment temperature and the compressor frequency may be obtained through experiments before leaving a factory, or obtained according to actual operation parameters in the actual operation process of the air conditioner. For example, the corresponding relationship between the outdoor ambient temperature and the compressor frequency obtained according to the actual operation parameters during the actual operation of the air conditioner is shown in table 1, where table 1 is only an example, and the specific corresponding relationship between the outdoor ambient temperature and the compressor frequency may be set according to the actual parameters and requirements of the air conditioner.
TABLE 1
Outdoor ambient temperature T (. degree. C.) Compressor frequency F (Hz)
43 80
44 79
45 75
46 71
47 68
48 60
49 58
50 55
51 50
52 48
It can be understood that when the outdoor ambient temperature T is gradually increased from a lower temperature, the corresponding compressor frequency F is gradually decreased; when the outdoor ambient temperature T is gradually decreased from a higher temperature, the corresponding compressor frequency F is gradually increased.
In this embodiment, in the use process of the air conditioner, the outdoor environment temperature gradually increases or gradually decreases along with the increase of the working time, and when the outdoor environment temperatures of a plurality of different types present an increasing trend, the frequencies of the plurality of different compressors corresponding to the outdoor environment temperatures are in a decreasing trend, so that the air conditioner can be ensured to operate at the optimal compressor frequency all the time along with the change of the outdoor environment temperature, thereby ensuring that the air conditioner can exert the maximum performance, improving the energy efficiency, saving the energy consumption, and further improving the refrigeration effect of the air conditioner and the comfortable experience of a user.
Optionally, the determining of the corresponding relationship between the outdoor environment temperature and the compressor frequency includes:
setting a plurality of laboratory environment temperatures, and determining a plurality of laboratory environment temperatures respectively matched with the laboratory environment temperatures.
And determining compressor frequencies respectively corresponding to the plurality of laboratory outdoor environment temperatures according to the laboratory environment temperatures, and taking the plurality of laboratory outdoor environment temperatures and the compressor frequencies respectively corresponding to the laboratory outdoor environment temperatures as the corresponding relation between the outdoor environment temperatures and the compressor frequencies.
It should be noted that the ambient temperature outside the laboratory is defined as TOutside the experimentThe ambient temperature in the laboratory is defined as TIn the experimentAnd a plurality of set laboratory outdoor environment temperatures TOutside the experimentIs linearly variable and thus corresponds to the ambient temperature T outside the laboratoryOutside the experimentMatched laboratory ambient temperature TIn the experimentAlso linearly varying.
Specifically, the laboratory can be divided into two relatively independent spaces, namely an indoor side environment chamber and an outdoor side environment chamber, by a laboratory peripheral heat insulation structure in the laboratory, so that the indoor and outdoor side rooms in the laboratory can be ensured, a relatively stable artificial simulation environment meeting the test requirements can be established, and the interference of the peripheral space is avoided; the air condition of the outdoor side environmental chamber can be adjusted by an air conditioning processing system in the laboratory toReach a plurality of set laboratory outdoor ambient temperatures TOutside the experiment(ii) a Multiple set laboratory outside ambient temperatures T can be obtained by a measurement data acquisition system in a laboratoryOutside the experimentRespectively matched laboratory ambient temperature TIn the experiment(ii) a The frequency F of the compressor can be controlled by a laboratory measurement control system in a laboratory, so that the frequency of the compressor and the current indoor environment temperature T of the indoor environment roomIn the experimentMatching and recording the outdoor ambient temperature T of a plurality of laboratoriesOutside the experimentAnd the ambient temperature T in the laboratoryIn the experimentAnd the environmental temperature T in a plurality of laboratoriesIn the experimentThe corresponding relation with the compressor frequency can obtain the outdoor environment temperatures T of a plurality of laboratories through two corresponding relationsOutside the experimentCorresponding to the compressor frequency.
Wherein the recorded outdoor environmental temperatures T of the plurality of laboratoriesOutside the experimentAnd the ambient temperature T in the laboratoryIn the experimentThe corresponding relation of (A) is shown in Table 2, Table 2 is only an example, and the specific outdoor environment temperature T of the experiment roomOutside the experimentAnd the ambient temperature T in the laboratoryIn the experimentThe corresponding relation can be set according to the actual parameters and requirements of the air conditioner.
TABLE 2
Figure BDA0002421489230000091
Figure BDA0002421489230000101
In addition, the recorded ambient temperatures T in the various laboratoriesIn the experimentThe correspondence with the compressor frequency is shown in table 3, where table 3 is only an example, and the specific laboratory ambient temperature TIn the experimentThe corresponding relation with the frequency of the compressor can be set according to the actual parameters and requirements of the air conditioner.
TABLE 3
Ambient temperature T in the laboratoryIn the experiment(℃) Compressor frequency F (Hz)
32 80
33 79
34 75
35 71
36 68
37 60
Therefore, the ambient temperature T outside the plurality of laboratories can be knownOutside the experimentThe corresponding relation with the compressor frequency is shown in table 4, the table 4 is only used as an example, and the specific outdoor environment temperature T isOutside the experimentThe corresponding relation with the frequency of the compressor can be set according to the actual parameters and requirements of the air conditioner.
TABLE 4
Ambient temperature T outside the laboratoryOutside the experiment(℃) Compressor frequency F (Hz)
43 80
44 79
45 75
46 71
47 68
48 60
In this embodiment, by setting a plurality of laboratory ambient temperatures, determining the laboratory ambient temperatures to which the plurality of laboratory ambient temperatures are respectively matched, the compressor frequencies respectively corresponding to the plurality of laboratory ambient temperatures can be determined according to the laboratory ambient temperatures, and finally using the plurality of laboratory ambient temperatures and the compressor frequencies respectively corresponding to the plurality of laboratory ambient temperatures as the corresponding relations between the outdoor ambient temperatures and the compressor frequencies, the corresponding relation between the outdoor ambient temperatures and the compressor frequencies can be queried through the outdoor ambient temperatures obtained in real time when the air conditioner is running, so as to determine the compressor frequencies corresponding to the outdoor ambient temperatures, so that the current compressor frequency of the air conditioner can be adjusted along with the change of the outdoor ambient temperatures obtained in real time, wherein the plurality of compressor frequencies and the plurality of corresponding outdoor ambient temperatures have a nonlinear relation, different from the existing linear relation that the frequency of each compressor and the outdoor environment temperature are fixed, the frequency of different compressors can be obtained through experiments before leaving a factory or obtained according to actual operation parameters in the actual operation process of the air conditioner, so that the air conditioner can be ensured to operate at the optimal compressor frequency all the time along with the change of the outdoor environment temperature, the maximum performance of the air conditioner can be ensured, the energy efficiency is further improved, the energy consumption is saved, and meanwhile, the operation effect of the air conditioner and the comfort of a user are ensured.
Optionally, the determining, according to the laboratory environment temperature, compressor frequencies respectively corresponding to the plurality of laboratory environment temperatures includes:
and starting a refrigeration mode under the condition of the environmental temperature in each laboratory, and acquiring the system pressure, the current and the compressor running frequency in the air conditioner running process.
Adjusting the compressor operating frequency.
And determining the maximum compressor frequency corresponding to the laboratory environment temperature according to the system pressure, the current and the compressor running frequency, and taking the maximum compressor frequency as the compressor frequency corresponding to the laboratory environment temperature matched with the laboratory environment temperature.
It should be noted that the system pressure is defined as P, the current is defined as a, the compressor operating frequency is defined as FCH, and the maximum compressor frequency is defined as FCHmax.
Specifically, the laboratory can be divided into two relatively independent spaces, namely an indoor side environment chamber and an outdoor side environment chamber, by a laboratory peripheral heat insulation structure in the laboratory, so that the indoor side room of the laboratory can be ensured, a relatively stable artificial simulation environment meeting the test requirements can be established, and the interference of a peripheral space is avoided; the air condition of the indoor environment room can be adjusted by the air conditioning processing system in the laboratory to reach the set certain indoor environment temperature TIn the experiment(ii) a The refrigeration mode can be controlled to be started through a laboratory measurement control system in a laboratory, and the running frequency FCH of the compressor is adjusted; the system pressure P, the current A and the compressor running frequency FCH can be obtained through a measurement data acquisition system in a laboratory so as to determine the ambient temperature T in each laboratoryIn the experimentCorresponding maximum compressor frequency FCHmax, and finally taking the maximum compressor frequency FCHmax as the ambient temperature T in each laboratoryIn the experimentAre respectively matchedOf the laboratory roomOutside the experimentThe corresponding compressor frequency F.
In this embodiment, a refrigeration mode is started under the condition of the ambient temperature in each laboratory, then the operation frequency of the compressor is adjusted, then the maximum compressor frequency corresponding to the ambient temperature in each laboratory is determined according to the system pressure, the current and the operation frequency of the compressor obtained in real time in the operation process of the air conditioner, finally the maximum compressor frequencies are used as the compressor frequency corresponding to the outdoor ambient temperature of each laboratory matched with the ambient temperature in each laboratory, so as to determine the corresponding relationship between the outdoor ambient temperature and the compressor frequency, so that the corresponding relationship between the outdoor ambient temperature and the compressor frequency can be inquired through the outdoor ambient temperature obtained in real time in the operation of the air conditioner, so as to determine the compressor frequency corresponding to the outdoor ambient temperature, and therefore the current compressor frequency of the air conditioner can be adjusted along with the change of the outdoor ambient temperature obtained in real time, the frequency of the compressor and the corresponding outdoor environment temperature are in a nonlinear relation, and the nonlinear relation is different from the existing linear relation that the frequency of each compressor and the outdoor environment temperature are fixed.
Optionally, the adjusting the compressor operating frequency comprises:
adjusting the compressor operating frequency at a preset rate.
Maintaining the adjusted compressor operating frequency unchanged when the adjusted compressor operating frequency is less than or equal to a preset compressor frequency.
It should be noted that the preset rate is defined as R, and the preset compressor frequency is defined as Fm, where the preset compressor frequency Fm can be the maximum operating frequency of the compressor itself, and therefore can be set according to different air-conditioning compressors.
Specifically, in the process of adjusting the operating frequency of the compressor, the operating frequency FCH of the compressor is adjusted at a preset rate R, and when the adjusted operating frequency FCH is less than or equal to Fm, the adjusted operating frequency FCH is kept unchanged, otherwise, when the adjusted operating frequency FCH is greater than Fm, the operating frequency FCH of the compressor is continuously adjusted at the preset rate R.
The optimal value of the preset rate R is 2Hz/min, in order to ensure the reliability of the compressor and avoid the problem that the operating frequency of the compressor fluctuates too fast up and down to influence the comfort of a user and cause poor user experience, the preset rate is not suitable to be selected to be too large, and therefore, the operating frequency FCH of the compressor is reduced at the preset rate of 2 Hz/min.
In this embodiment, in the process of adjusting the operating frequency of the compressor, the operating frequency of the compressor is first adjusted at a preset rate, and then whether the adjusted operating frequency of the compressor is maintained is determined according to the relationship between the adjusted operating frequency of the compressor and the preset frequency of the compressor, so as to ensure that the adjusted operating frequency of the compressor can ensure that the air conditioner can exert the maximum performance, thereby improving the energy efficiency, achieving the effect of saving energy consumption, and simultaneously ensuring the refrigeration effect of the air conditioner, thereby satisfying the comfortable experience of a user.
Optionally, the determining, according to the system pressure, the current, and the compressor operating frequency, a maximum compressor frequency corresponding to the laboratory ambient temperature includes:
and when the system pressure is less than or equal to a preset system pressure, the current is less than or equal to a preset current, and the adjusted compressor running frequency is not changed any more within a continuous preset time, taking the adjusted compressor running frequency as the maximum compressor frequency corresponding to the indoor environment temperature.
It should be noted that the preset system pressure is defined as Pm, the preset current is defined as Am, and the preset time is defined as N, where the preset system pressure Pm and the preset current Am may be the maximum operating system pressure and the maximum operating current of the air conditioner itself, respectively, and thus may be set according to different air conditioners.
Specifically, when P ≦ Pm and A ≦ Am do not change for N consecutive minutes, the adjusted compressor operating frequency FCH is taken as the ambient temperature T in the laboratoryIn the experimentA corresponding maximum compressor frequency FCHmax; otherwise, the compressor operating frequency FCH continues to be adjusted.
In this embodiment, according to the relationship between the system pressure and the preset system pressure, the relationship between the current and the preset current, and the variation of the operating frequency of the adjusted compressor within a period of time, it is determined whether to use the operating frequency of the adjusted compressor as the maximum compressor frequency corresponding to the current environmental temperature in the laboratory, so as to ensure that the air conditioner can exert the maximum performance when the refrigeration mode is started under the condition of the current environmental temperature in the laboratory, thereby improving the energy efficiency, saving the energy consumption, and simultaneously ensuring the refrigeration effect of the air conditioner and the comfort level of a user.
Optionally, the outdoor environment temperature of the plurality of laboratories is greater than or equal to the starting point temperature of the preset air-conditioning high-temperature zone and less than or equal to the ending point temperature of the preset air-conditioning high-temperature zone.
It should be noted that, the air conditioner can still normally operate when the current working environment temperature of the air conditioner is within the range of the high temperature area of the air conditioner, but if the current working environment temperature of the air conditioner is higher than the upper limit temperature of the high temperature area, the heat radiation of the outdoor unit of the air conditioner is poor, and the compressor of the outdoor unit is protected from overheating. Therefore, the high-temperature area of the air conditioner refers to a high outdoor temperature area in which the air conditioner can normally operate. The temperature at the starting point of the high temperature zone of the air conditioner is defined as T1The end point temperature of the preset air-conditioning high-temperature zone is defined as T2。
In particular, at T1To T2Selecting multiple temperatures in the range as the outdoor environment temperature T for the testOutside the experimentE.g. T1May preferably be 43 ℃ T2Preferably 52 ℃, and the temperature T outside the laboratory room can be selected within the range of 43-52 ℃ at intervals of 1 DEG COutside the experimentNamely 43 ℃, 44 ℃, 45 ℃, 46 ℃, 47 ℃, 48 ℃ and the like as shown in Table 1.
In this embodiment, a plurality of laboratory outdoor environment temperatures are selected in the range between the starting point temperature of the high-temperature region of the air conditioner and the end point temperature of the high-temperature region of the air conditioner, so as to determine the laboratory environment temperatures respectively matched with the starting point temperature of the high-temperature region of the air conditioner by using the laboratory outdoor environment temperatures, thereby determining the compressor frequencies respectively corresponding to the plurality of laboratory outdoor environment temperatures according to the laboratory environment temperatures, and finally, the plurality of laboratory outdoor environment temperatures and the compressor frequencies respectively corresponding to the laboratory environment temperatures are used as the corresponding relations between the outdoor environment temperatures and the compressor frequencies, so that the corresponding relation between the outdoor environment temperatures and the compressor frequencies can be inquired through the outdoor environment temperatures acquired in real time when the air conditioner is operated, thereby determining the compressor frequencies corresponding to the outdoor environment temperatures, and thereby the current compressor frequency of the air conditioner can be adjusted along with the change of, the invention is characterized in that the frequencies of the plurality of compressors and the corresponding outdoor environment temperatures are in a nonlinear relation, and the nonlinear relation is different from the existing linear relation that the frequencies of the compressors and the outdoor environment temperatures are fixed.
As shown in fig. 2, a control device for cooling at high temperature according to another embodiment of the present invention includes:
and the acquisition unit is used for acquiring the outdoor environment temperature.
And the processing unit is used for determining the compressor frequency corresponding to the outdoor environment temperature according to the corresponding relation between the outdoor environment temperature and the compressor frequency, wherein the plurality of different compressor frequencies respectively corresponding to the plurality of different outdoor environment temperatures which are linearly changed are nonlinearly changed.
In another embodiment of the present invention, an air conditioner includes a computer readable storage medium storing a computer program and a processor, and when the computer program is read and executed by the processor, implements the control method of cooling at high temperature as described above.
In another embodiment of the present invention, a computer-readable storage medium stores a computer program which, when read and executed by a processor, implements the control method of cooling at high temperature as described above.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A method of controlling refrigeration at an elevated temperature, comprising:
acquiring the outdoor environment temperature;
and determining the compressor frequency corresponding to the outdoor environment temperature according to the corresponding relation between the outdoor environment temperature and the compressor frequency, wherein the plurality of different compressor frequencies respectively corresponding to the plurality of different outdoor environment temperatures which are changed in a linear mode are changed in a non-linear mode.
2. A method for controlling cooling at an elevated temperature as recited in claim 1 wherein said determining a compressor frequency corresponding to said outdoor ambient temperature comprises:
a plurality of different compressor frequencies are in a decreasing trend as a plurality of different outdoor ambient temperatures are in an increasing trend.
3. A method for controlling cooling at a high temperature as set forth in claim 1, wherein said determining of the correspondence between the outdoor ambient temperature and the compressor frequency comprises:
setting a plurality of laboratory environment temperatures, and determining the laboratory environment temperatures respectively matched with the plurality of laboratory environment temperatures;
and determining compressor frequencies respectively corresponding to the plurality of laboratory outdoor environment temperatures according to the laboratory environment temperatures, and taking the plurality of laboratory outdoor environment temperatures and the compressor frequencies respectively corresponding to the laboratory outdoor environment temperatures as the corresponding relation between the outdoor environment temperatures and the compressor frequencies.
4. A method for controlling cooling at high temperature according to claim 3, wherein said determining a plurality of compressor frequencies corresponding to respective ones of said plurality of laboratory ambient temperatures based on said laboratory ambient temperature comprises:
starting a refrigeration mode under the condition of the environmental temperature in each laboratory to obtain the system pressure, the current and the compressor operation frequency in the air conditioner operation process;
adjusting the compressor operating frequency;
and determining the maximum compressor frequency corresponding to the laboratory environment temperature according to the system pressure, the current and the compressor running frequency, and taking the maximum compressor frequency as the compressor frequency corresponding to the laboratory environment temperature matched with the laboratory environment temperature.
5. A method of controlling refrigeration at elevated temperatures as recited in claim 4 wherein said adjusting said compressor operating frequency comprises:
adjusting the compressor operating frequency at a preset rate;
maintaining the adjusted compressor operating frequency unchanged when the adjusted compressor operating frequency is less than or equal to a preset compressor frequency.
6. A method of controlling refrigeration at an elevated temperature as recited in claim 5 wherein said determining a maximum compressor frequency for said laboratory ambient temperature based on said system pressure, said current, and said compressor operating frequency comprises:
and when the system pressure is less than or equal to a preset system pressure, the current is less than or equal to a preset current, and the adjusted compressor running frequency is not changed any more within a continuous preset time, taking the adjusted compressor running frequency as the maximum compressor frequency corresponding to the indoor environment temperature.
7. The method as claimed in any one of claims 3 to 6, wherein the plurality of outdoor environment temperatures are greater than or equal to a preset starting temperature of the high temperature zone of the air conditioner and less than or equal to a preset ending temperature of the high temperature zone of the air conditioner.
8. A control device for cooling at high temperatures, comprising:
an acquisition unit for acquiring an outdoor ambient temperature;
and the processing unit is used for determining the compressor frequency corresponding to the outdoor environment temperature according to the corresponding relation between the outdoor environment temperature and the compressor frequency, wherein the plurality of different compressor frequencies respectively corresponding to the plurality of different outdoor environment temperatures which are linearly changed are nonlinearly changed.
9. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the control method of cooling at high temperature according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the control method of refrigeration at high temperature according to any one of claims 1 to 7.
CN202010207073.3A 2020-03-23 2020-03-23 Control method and device for refrigeration at high temperature, air conditioner and storage medium Pending CN111351175A (en)

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