CN113137703A - Control method for minimum operating frequency of variable frequency air conditioner and air conditioner - Google Patents
Control method for minimum operating frequency of variable frequency air conditioner and air conditioner Download PDFInfo
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- CN113137703A CN113137703A CN202110568486.9A CN202110568486A CN113137703A CN 113137703 A CN113137703 A CN 113137703A CN 202110568486 A CN202110568486 A CN 202110568486A CN 113137703 A CN113137703 A CN 113137703A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The embodiment of the invention provides a control method for minimum operating frequency of a variable frequency air conditioner and the air conditioner. The control method of the minimum operating frequency of the variable frequency air conditioner comprises the following steps: starting up the refrigerator to obtain an indoor environment temperature value and an outdoor environment temperature value; setting an initial refrigeration lower limit frequency according to the outdoor environment temperature value; setting a frequency correction value according to the indoor environment temperature value; setting a refrigeration lower limit frequency according to the initial refrigeration lower limit frequency and the frequency correction value; wherein the frequency correction value is inversely related to the indoor ambient temperature value. The invention solves the technical problem of liquid accumulation in the compressor when the indoor environment temperature value is lower.
Description
Technical Field
The invention relates to the technical field of variable frequency air conditioners, in particular to a control method of the minimum operating frequency of a variable frequency air conditioner and the air conditioner.
Background
At present, the minimum frequency of the variable frequency air conditioner is set based on the outdoor environment temperature when the minimum operation frequency is designed. However, the problems that when the indoor environment temperature value is low and the air conditioner runs in a refrigerating mode, the heat exchange effect of an evaporator of an indoor unit of the air conditioner is poor, the refrigerant is not evaporated completely, liquid refrigerant which is not evaporated completely is sucked into the compressor, liquid accumulation in the compressor is caused, and the compressor is damaged are not considered.
Disclosure of Invention
In order to solve the problem that the compressor is damaged by accumulated liquid in the compressor when the compressor is in refrigeration operation under the condition of low indoor environment temperature value, the invention provides a control method of the minimum operation frequency of a variable frequency air conditioner, which comprises the following steps: starting up the refrigerator to obtain an indoor environment temperature value and an outdoor environment temperature value; setting an initial refrigeration lower limit frequency according to the outdoor environment temperature value; setting a frequency correction value according to the indoor environment temperature value; setting a refrigeration lower limit frequency according to the initial refrigeration lower limit frequency and the frequency correction value; wherein the frequency correction value is inversely related to the indoor ambient temperature value.
The technical effect achieved after the technical scheme is adopted is as follows: through setting up the frequency correction value with the indoor environment temperature value is negative correlation, can improve compressor operating frequency correction value when indoor environment is lower to can improve the heat transfer effect of air conditioner indoor unit evaporimeter, avoid the compressor liquid refrigerant flow compressor when the lower condition of indoor environment temperature value operation, cause the inside hydrops problem that the compressor was damaged of appearing of compressor.
In this embodiment, the setting of the lower limit refrigeration frequency according to the initial lower limit refrigeration frequency and the frequency correction value includes: fLower part＝FFirst stage+ A; wherein, FLower partTo lower limit frequency of refrigeration, FFirst stageThe lower limit frequency of the initial refrigeration is A, and the corrected value of the frequency is A.
The technical effect achieved after the technical scheme is adopted is as follows: the final refrigeration lower limit frequency is set by combining the initial refrigeration lower limit frequency and the frequency correction value, so that two factors of an outdoor environment temperature value and an indoor environment temperature value can be considered in a combined manner, the lower limit operating frequency of the compressor is properly improved, the superheat degree of the oil temperature at the bottom of the compressor is improved, the problem of liquid accumulation inside the compressor caused by insufficient superheat degree of the oil temperature at the bottom of the compressor can be avoided, and the reliable operation of the compressor is further ensured.
In this embodiment, the setting of the initial cooling lower limit frequency according to the outdoor environment temperature value includes: setting a preset outdoor environment temperature threshold; judging the magnitude relation between the outdoor environment temperature value and the preset outdoor environment temperature threshold value, and determining the temperature interval where the outdoor environment temperature value is located; wherein, TPreparation ofComprising TPreparation 1，TPreparation 2，TPreparation 3，TPreparation 4And T isPreparation 1<TPreparation 2<TPreparation 3<TPreparation 4；TPreparation ofTo preset outdoor ambient temperature threshold, TPreparation 1For a first preset outdoor ambient temperature threshold, TPreparation 2For a second preset outdoor ambient temperature threshold, TPreparation 3For a third preset outdoor ambient temperature threshold, TPreparation 4The fourth preset outdoor ambient temperature threshold.
The technical effect achieved after the technical scheme is adopted is as follows: through predetermineeing a plurality of outdoor ambient temperature threshold values, divide into a plurality of different temperature intervals with outdoor ambient temperature value, low temperature region, normal warm district, high temperature region and two transition zones promptly, can formulate different lower limit frequency to the temperature interval of difference to can make the compressor can both the steady operation in the temperature interval of difference, and then guaranteed inverter air conditioner's job stabilization nature.
In this embodiment, the relationship between the outdoor environment temperature value and the preset outdoor environment temperature threshold is determined, and the outdoor environment temperature value is determinedThe temperature interval includes: t isOuter cover＜TPreparation 1When F is presentFirst stage＝F3；TPreparation 1≤TOuter cover＜TPreparation 2When F is presentFirst stage＝F1+(F3-F1)*(TPreparation 2-TOuter cover)/(TPreparation 2-TPreparation 1)；TPreparation 2≤TOuter cover＜TPreparation 3When F is presentFirst stage＝F1；TPreparation 3≤TOuter cover＜TPreparation 4When F is presentFirst stage＝F1+(F2-F1)*(TOuter cover-TPreparation 3)/(TPreparation 4-TPreparation 3)；TOuter cover≥TPreparation 4When F is presentFirst stage＝F2(ii) a Wherein, F1Is the first initial cooling lower limit frequency, F2Is the second initial cooling lower limit frequency, F3Is a third initial cooling lower limit frequency, and F1＜F2＜F3。
The technical effect achieved after the technical scheme is adopted is as follows: the problem of liquid accumulation in the compressor caused by low superheat degree of the compressor can be effectively prevented by setting high initial refrigeration lower limit frequency in a low-temperature region; the lower initial refrigeration lower limit frequency is set in the normal temperature area, so that the influence of the normal refrigeration process caused by the fact that the air conditioner is always stopped when reaching the temperature can be avoided; the reason that the higher refrigeration lower limit frequency is set in the high-temperature area is that the air conditioner is in a high-load state when the outdoor temperature is higher, and if the lower compressor running frequency is set, the step-out fault is easily triggered, so that the compressor cannot run reliably; the transition region between the low-temperature region and the normal-temperature region and the transition region between the normal-temperature region and the high-temperature region are arranged, so that the frequency of the compressor can be gradually increased or decreased, and the phenomenon that the frequency of the compressor is suddenly changed to influence the stable operation of the compressor can be avoided.
In this embodiment, the setting a frequency correction value according to the indoor environment temperature value includes: setting a gear and setting a frequency correction value according to the indoor environment temperature value and the indoor fan.
The technical effect achieved after the technical scheme is adopted is as follows: after the corresponding initial refrigeration lower limit frequency is set according to the outdoor temperature, the initial refrigeration lower limit frequency is corrected and adjusted according to the indoor environment temperature value and the set gear of the indoor fan, so that the bottom superheat degree of the compressor can be in the reliable operation range of the compressor, and the reliable operation of the compressor is further ensured.
In this embodiment, the setting a frequency correction value according to the indoor environment temperature value and the indoor fan setting gear includes: t isInner part≤TInner 1，A＝[3ΔF,6ΔF]；TInner 1＜TInner part≤TInner 2When A is [ 2. DELTA.F, 5. DELTA.F]；TInner 2＜TInner part≤TInner 3When A is ═ Δ F,4 Δ F]；TInner 3＜TInner part≤TInner 4When A is [0, 3. delta. F]；TInner 4＜TInner part≤TInner 5When A is [0, 2. delta. F]；TInner 5＜TInner partWhen A is [0,. DELTA.F](ii) a Wherein, TInner 1For a first preset outdoor ambient temperature threshold, TInner 2For a second preset outdoor ambient temperature threshold, TInner 3For a third preset outdoor ambient temperature threshold, TInner 4For a fourth preset outdoor ambient temperature threshold, TInner 5Is a first preset outdoor environment temperature threshold, and deltaf is a correction factor.
The technical effect achieved after the technical scheme is adopted is as follows: through presetting a plurality of indoor environment temperature threshold values, divide into a plurality of different temperature intervals with indoor environment temperature value to can adjust corresponding frequency correction value, adjust corresponding compressor operating frequency lower limit to different temperature intervals, make the compressor can both the steady operation in each indoor temperature interval. The lower the indoor environment temperature value is, the worse the heat exchange effect is, the higher frequency correction value needs to be set, and the compressor frequency is further improved.
In this embodiment, the setting a frequency correction value according to the indoor environment temperature value and the indoor fan setting gear further includes: when the gear of the indoor fan is set to be breeze/mute/low wind gear, A is ═ delta F,6 delta F; when the gear set by the indoor fan is a middle wind gear, A is [0,5 delta F ]; when the gear set by the indoor fan is a high gear, A is [0,4 delta F ]; when the gear set for the indoor fan is the super strong gear, A is [0,3 delta F ].
The technical effect achieved after the technical scheme is adopted is as follows: setting a corresponding frequency correction value through a gear set by the indoor fan, and setting a higher frequency correction value when the gear set by the indoor fan is a breeze gear, a mute gear or a low wind gear; when the gear of the indoor fan is set to be the superstrong wind gear, a lower frequency correction value is set; the lower the wind shield of the indoor fan is, the poorer the heat exchange effect is, so that a higher frequency correction value needs to be set, the frequency of the compressor is further improved, and a certain superheat degree is ensured.
In this embodiment, the correction factor is 4 Hz.
An embodiment of the present invention provides an air conditioner, including: the detection module is used for detecting an indoor environment temperature value and an outdoor environment temperature value; the calculation module is used for calculating an initial refrigeration lower limit frequency according to the indoor environment temperature value, calculating a frequency correction value according to the outdoor environment temperature value, and calculating a refrigeration lower limit frequency according to the initial refrigeration lower limit frequency and the frequency correction value; and the control module is used for setting the lower refrigeration limit frequency according to the indoor environment temperature value and the outdoor environment temperature value.
An embodiment of the present invention provides an air conditioner, including: a computer readable storage medium storing a computer program and a packaged IC, the computer program being read by the packaged IC and executed by the packaged IC, the air conditioner implementing the method for controlling a minimum operating frequency of an inverter air conditioner according to any one of claims 1 to 8.
In summary, the above embodiments of the present application may have one or more of the following advantages or benefits:
through setting up the frequency correction value with indoor environment temperature value is negative correlation, can improve the heat transfer effect of air conditioner internal unit evaporimeter when indoor environment is lower to can improve the operating frequency of compressor, avoid the compressor liquid refrigerant inflow compressor when the lower condition of indoor environment temperature value moves, cause the inside hydrops problem that the compressor was damaged to the compressor that appears.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for controlling a minimum operating frequency of an inverter air conditioner according to a first embodiment of the present invention.
Fig. 2 is a block diagram of an air conditioner according to a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a readable storage medium according to a fourth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
By the control method for the minimum operating frequency of the variable frequency air conditioner, provided by the first embodiment of the invention, the lower limit operating frequency can be properly increased according to different operating gears of the internal fan when the indoor environment temperature value is lower, so that the refrigeration superheat degree of the compressor is improved, and the compressor is prevented from being damaged due to the fact that liquid refrigerant enters the compressor.
Referring to fig. 1, it is a schematic flow chart of a method for controlling a minimum operating frequency of an inverter air conditioner according to a first embodiment of the present invention. The control method includes, for example:
and S10, cooling and starting up, and acquiring an indoor environment temperature value and an outdoor environment temperature value.
The indoor environment temperature value is the environment temperature of the air conditioner internal unit, and the outdoor environment temperature value is the environment temperature of the air conditioner external unit. The temperature value of the indoor environment can be obtained by arranging a temperature sensor on the air conditioner indoor unit, and of course, the temperature sensor is arranged in the indoor environment where the air conditioner indoor unit is located, and is not limited to be arranged on the air conditioner outdoor unit. Similarly, the manner of obtaining the outdoor environment temperature value is the same as the manner of obtaining the indoor environment temperature value, and is not repeated here.
And S20, setting the lower limit frequency of the initial refrigeration according to the outdoor environment temperature value.
The S20 includes, for example: and judging the magnitude between the outdoor environment temperature value and a preset outdoor environment temperature threshold value, and setting the initial refrigeration lower limit frequency. Wherein, TPreparation ofComprising TPreparation 1，TPreparation 2，
TPreparation 3，TPreparation 4And T isPreparation 1<TPreparation 2<TPreparation 3<TPreparation 4(ii) a In particular, TPreparation ofTo preset outdoor ambient temperature threshold, TPreparation 1For a first preset outdoor ambient temperature threshold, TPreparation 2For a second preset outdoor ambient temperature threshold, TPreparation 3For a third preset outdoor ambient temperature threshold, TPreparation 4The fourth preset outdoor ambient temperature threshold.
Furthermore, according to the preset outdoor environment temperature threshold value, the outdoor environment temperature is divided into five temperature intervals, so that the corresponding initial refrigeration lower limit frequency can be set according to different temperature intervals, and the stable operation of the compressor in each temperature interval is further ensured. Specifically, the range TOuter cover＜TPreparation 1In the low temperature region, range TPreparation 1≤TOuter cover＜TPreparation 2Is a first transition zone, range TPreparation 2≤TOuter cover＜TPreparation 3Is a normal temperature zone, range TPreparation 3≤TOuter cover＜TPreparation 4Is a second transition region, range TOuter cover≥TPreparation 4Is a high temperature zone. Wherein, TOuter coverIs the outdoor ambient temperature value.
In one embodiment, the first predetermined outdoor ambient temperature threshold is-5 deg.C, the second predetermined outdoor ambient temperature threshold is 15 deg.C, the third predetermined outdoor ambient temperature threshold is 35 deg.C, and the fourth predetermined outdoor ambient temperature threshold is 43 deg.C. The outdoor environment temperature value is in a low-temperature region when being lower than minus 5 ℃, is in a first transition region when being between minus 5 ℃ and 15 ℃, is in a normal-temperature region when being between 15 ℃ and 35 ℃, is in a second transition region when being between 35 ℃ and 43 ℃, and is in a high-temperature region when being higher than 43 ℃.
Further, when the outdoor environment temperature value is lower than-5 ℃, FFirst stage＝F3(ii) a F when the outdoor environment temperature value is between-5 ℃ and 15 DEG CFirst stage＝F1+(F3-F1)*(TPreparation 2-TOuter cover)/(TPreparation 2-TPreparation 1) (ii) a F when the outdoor environment temperature value is between 15 ℃ and 35 DEG CFirst stage＝F1(ii) a F when the outdoor environment temperature value is between 35 ℃ and 43 DEG CFirst stage＝F1+(F2-F1)*(TOuter cover-TPreparation 3)/(TPreparation 4-TPreparation 3) (ii) a F when the outdoor environment temperature value is higher than 43 DEG CFirst stage＝F2. Wherein, FFirst stageTo the lower limit frequency of initial cooling, F1Is the first initial cooling lower limit frequency, F2Is the second initial cooling lower limit frequency, F3Is the third initial cooling lower limit frequency. Specifically, F1＜F2＜F3。
For example, when the outdoor unit of the air conditioner is in a low temperature region, that is, the outdoor environment temperature value is lower than-5 ℃, the lower limit frequency of the initial refrigeration is 46 Hz; when the outdoor unit of the air conditioner is in a normal temperature area, namely the outdoor environment temperature value is between 15 ℃ and 35 ℃, the lower limit frequency of the initial refrigeration is 20 Hz; when the outdoor unit of the air conditioner is in a high-temperature area, namely the outdoor environment temperature value is higher than 43 ℃, the lower limit frequency of the initial refrigeration is 30 Hz.
The lower limit frequency of initial refrigeration is set at a low-temperature area, so that the superheat degree of the compressor during refrigeration can be improved, and the problem of liquid accumulation in the compressor caused by low superheat degree of the compressor is solved; a lower initial refrigeration lower limit frequency is set in a normal temperature area, so that the influence of the normal refrigeration process caused by the fact that the air conditioner is always stopped when reaching the temperature can be avoided; the reason why the lower refrigeration limit frequency is set in the high-temperature region is that the air conditioner is in a high-load state when the outdoor temperature is high, and if the lower compressor operation frequency is set, the step-out fault is easily triggered, so that the compressor cannot operate reliably.
Further, when the air conditioner outdoor unit is located in a first transition area, namely between a low temperature area and a normal temperature area, the initial refrigeration lower limit frequency is gradually reduced from 46Hz to 20 Hz; when the outdoor unit of the air conditioner is in a second transition area, namely between the normal temperature area and the high temperature area, the initial refrigeration lower limit frequency is gradually increased from 20Hz to 30 Hz. Through setting up two transition regions for compressor frequency can be gradually improved or reduce, thereby can avoid compressor frequency to change suddenly, then influences the steady operation of compressor.
And S30, setting a frequency correction value according to the indoor environment temperature value.
The S30 includes, for example: setting a gear and setting a frequency correction value according to the indoor environment temperature value and the indoor fan. Wherein the frequency correction value is inversely related to the indoor ambient temperature value. Setting a higher frequency correction value when the indoor environment temperature value is lower; and when the indoor environment temperature value is higher, setting a lower frequency correction value.
Further, TInner part≤TInner 1When A is [ 3. delta. F, 6. delta. F]；TInner 1＜TInner part≤TInner 2When A is [ 2. DELTA.F, 5. DELTA.F]；TInner 2＜TInner part≤TInner 3When A is ═ Δ F,4 Δ F]；TInner 3＜TInner part≤TInner 4When A is [0,3 ]
ΔF]；TInner 4＜TInner part≤TInner 5When A is [0, 2. delta. F]；TInner 5＜TInner partWhen A is [0,. DELTA.F](ii) a Wherein the content of the first and second substances,
a is a frequency correction value, TInner 1For a first preset outdoor ambient temperature threshold, TInner 2For a second preset outdoor ambient temperature threshold, TInner 3For a third preset outdoor ambient temperature threshold, TInner 4For a fourth preset outdoor ambient temperature threshold, TInner 5For a first preset outdoor ambient temperature threshold, TInner 1< Δ F is a correction coefficient.
In one particular embodiment, the first preset outdoor ambient temperature threshold is 13 ℃; the second preset outdoor environment temperature threshold is 16 ℃; the third preset outdoor environment temperature threshold is 19 ℃; the fourth preset outdoor environment temperature threshold is 22 ℃; the fifth preset outdoor environment temperature threshold is 13 ℃, and the correction coefficient is 4 Hz.
Further, when the gear of the indoor fan is set to be a breeze/mute/low wind gear, a is ═ Δ F,6 Δ F ]; when the gear set by the indoor fan is a middle wind gear, A is [0,5 delta F ]; when the gear set by the indoor fan is a high gear, A is [0,4 delta F ]; when the gear set for the indoor fan is the super strong gear, A is [0,3 delta F ]. Specifically, as shown in table 1:
TABLE 1
When the indoor environment temperature value is low and the inner machine windshield is low, the heat exchange effect of the evaporator of the inner machine of the air conditioner is poor, and the refrigerant is not completely evaporated; if the compressor operates at a low frequency, the liquid refrigerant that is not completely evaporated is sucked into the compressor, causing abnormal impact of the compressor and damage to internal parts of the compressor. Therefore, when the indoor environment temperature value is low, the initial lower limit frequency is corrected and controlled according to the indoor environment temperature and the set gear of the indoor fan, the running frequency of the compressor is further improved, a certain superheat degree is guaranteed, the problem that refrigerant in the evaporator is not completely evaporated is avoided, and the problem that the compressor is damaged due to the fact that liquid refrigerant flows into the compressor is further avoided.
And S40, setting the lower limit frequency of refrigeration according to the initial lower limit frequency of refrigeration and the frequency correction value.
Wherein, FLower part＝FFirst stage+ A, i.e. the lower limit frequency of refrigeration is equal to the sum of the lower limit frequency of initial refrigeration and the frequency correction value.
[ second embodiment ]
The second embodiment of the present invention provides an air conditioner 200. Referring to fig. 2, the air conditioner 200 includes, for example: a detection module 210, a calculation module 220, and a control module 230.
The detection module 210 is configured to detect an indoor environment temperature value and an outdoor environment temperature value; the calculation module 220 is configured to calculate an initial refrigeration lower limit frequency according to the indoor environment temperature value, calculate a frequency correction value according to the outdoor environment temperature value, and calculate a refrigeration lower limit frequency according to the initial refrigeration lower limit frequency and the frequency correction value; the control module 230 is configured to set a lower cooling limit frequency according to the indoor environment temperature value and the outdoor environment temperature value. In a specific embodiment, the detection module 210, the calculation module 220, and the control module 230 cooperate to implement the control method for the minimum operating frequency of the inverter air conditioner according to the first embodiment.
[ third embodiment ]
A third embodiment of the present invention provides an air conditioner, for example, including: a computer-readable storage medium storing a computer program and a packaged IC, the computer program being read by the packaged IC and executed by the packaged IC, the air conditioner implementing the method for controlling a minimum operating frequency of an inverter air conditioner according to the first embodiment.
In one embodiment, the packaged IC is, for example, a processor chip electrically connected to the computer-readable storage medium to read and execute the computer program. The packaged IC may also be a packaged circuit board, which is packaged with a processor chip that can read and execute the computer program; of course, the circuit board may also encapsulate the computer-readable storage medium. The processor chip may further be provided with the air conditioner 200 according to the second embodiment, and the processor chip may implement the control method for the minimum operating frequency of the inverter air conditioner according to the first embodiment through the air conditioner 200.
[ fourth example ] A
Referring to fig. 3, a schematic structural diagram of a readable storage medium according to a fourth embodiment of the present invention is shown. The readable storage medium 300 is, for example, a nonvolatile memory, which is, for example: magnetic media (e.g., hard disks, floppy disks, and magnetic tape), optical media (e.g., CDROM disks and DVDs), magneto-optical media (e.g., optical disks), and hardware devices specially constructed for storing and executing computer-executable instructions (e.g., Read Only Memories (ROMs), Random Access Memories (RAMs), flash memories, etc.). The readable storage medium 300 has stored thereon computer-executable instructions 310. The readable storage medium 300 may be executed by one or more processors or processing devices to execute the computer-executable instructions 310, so as to enable the air conditioner in which the readable storage medium 300 is located to implement the control method for the minimum operating frequency of the inverter air conditioner as described in the first embodiment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A control method for the minimum operation frequency of a variable frequency air conditioner is characterized by comprising the following steps:
starting up the refrigerator to obtain an indoor environment temperature value and an outdoor environment temperature value;
setting an initial refrigeration lower limit frequency according to the outdoor environment temperature value;
setting a frequency correction value according to the indoor environment temperature value;
setting a refrigeration lower limit frequency according to the initial refrigeration lower limit frequency and the frequency correction value;
wherein the frequency correction value is inversely related to the indoor ambient temperature value.
2. The method for controlling the minimum operating frequency of the inverter air conditioner according to claim 1, wherein the setting the lower limit frequency of refrigeration according to the initial lower limit frequency of refrigeration and the frequency correction value comprises:
Flower part＝FFirst stage+A；
Wherein, FLower partTo lower limit frequency of refrigeration, FFirst stageThe lower limit frequency of the initial refrigeration is A, and the corrected value of the frequency is A.
3. The method for controlling the minimum operating frequency of the inverter air conditioner as claimed in claim 2, wherein the setting of the initial cooling lower limit frequency according to the outdoor environment temperature value comprises:
setting a preset outdoor environment temperature threshold;
judging the magnitude relation between the outdoor environment temperature value and the preset outdoor environment temperature threshold value, and determining the temperature interval where the outdoor environment temperature value is located;
wherein, TPreparation ofComprising TPreparation 1，TPreparation 2，TPreparation 3，TPreparation 4And T isPreparation 1<TPreparation 2<TPreparation 3<TPreparation 4；
TPreparation ofTo preset outdoor ambient temperature threshold, TPreparation 1For a first preset outdoor ambient temperature threshold, TPreparation 2For a second preset outdoor ambient temperature threshold, TPreparation 3For a third preset outdoor ambient temperature threshold, TPreparation 4The fourth preset outdoor ambient temperature threshold.
4. The method for controlling the minimum operating frequency of the inverter air conditioner as claimed in claim 3, wherein the determining the magnitude relationship between the outdoor environment temperature value and the preset outdoor environment temperature threshold value and the determining the temperature interval where the outdoor environment temperature value is located comprises:
Touter cover＜TPreparation 1When F is presentFirst stage＝F3；
TPreparation 1≤TOuter cover＜TPreparation 2When F is presentFirst stage＝F1+(F3-F1)*(TPreparation 2-TOuter cover)/(TPreparation 2-TPreparation 1)；
TPreparation 2≤TOuter cover＜TPreparation 3When F is presentFirst stage＝F1；
TPreparation 3≤TOuter cover＜TPreparation 4When F is presentFirst stage＝F1+(F2-F1)*(TOuter cover-TPreparation 3)/(TPreparation 4-TPreparation 3)；
TOuter cover≥TPreparation 4When F is presentFirst stage＝F2；
Wherein, TOuter coverIs an outdoor ambient temperature value, F1Is the first initial cooling lower limit frequency, F2Is the second initial cooling lower limit frequency, F3Is a third initial cooling lower limit frequency, and F1＜F2＜F3。
5. The method for controlling the minimum operating frequency of the inverter air conditioner according to claim 1, wherein the setting of the frequency correction value according to the indoor environment temperature value comprises:
setting a gear and setting a frequency correction value according to the indoor environment temperature value and the indoor fan.
6. The method for controlling the minimum operating frequency of the inverter air conditioner according to claim 1, wherein the setting of the frequency correction value according to the indoor environment temperature value and the indoor fan setting gear comprises:
Tinner part≤TInner 1When A is [ 3. delta. F, 6. delta. F]；
TInner 1＜TInner part≤TInner 2When A is [ 2. DELTA.F, 5. DELTA.F]；
TInner 2＜TInner part≤TInner 3When A is ═ Δ F,4 Δ F]；
TInner 3＜TInner part≤TInner 4When A is [0, 3. delta. F]；
TInner 4＜TInner part≤TInner 5When A is [0, 2. delta. F]；
TInner 5＜TInner partWhen A is [0,. DELTA.F]；
Wherein, DeltaF is a correction factor, TInner 1For a first preset outdoor ambient temperature threshold, TInner 2For a second preset outdoor ambient temperature threshold, TInner 3For a third preset outdoor ambient temperature threshold, TInner 4For a fourth preset outdoor ambient temperature threshold, TInner 5A first preset outdoor ambient temperature threshold, and TInner 1＜TInner 2＜TInner 3＜TInner 4＜TInner 5。
7. The method for controlling the minimum operating frequency of the inverter air conditioner according to claim 5, wherein the setting of the frequency correction value according to the indoor environment temperature value and the indoor fan setting gear further comprises:
when the gear of the indoor fan is set to be breeze/mute/low wind gear, A is ═ delta F,6 delta F;
when the gear set by the indoor fan is a middle wind gear, A is [0,5 delta F ];
when the gear set by the indoor fan is a high gear, A is [0,4 delta F ];
when the gear set for the indoor fan is the super strong gear, A is [0,3 delta F ].
8. The method for controlling the minimum operating frequency of a variable frequency air conditioner according to claim 6 or 7,
the correction factor Δ F is 4 Hz.
9. An air conditioner, comprising:
the detection module is used for detecting an indoor environment temperature value and an outdoor environment temperature value;
the calculation module is used for calculating an initial refrigeration lower limit frequency according to the indoor environment temperature value, calculating a frequency correction value according to the outdoor environment temperature value, and calculating a refrigeration lower limit frequency according to the initial refrigeration lower limit frequency and the frequency correction value;
and the control module is used for setting the lower refrigeration limit frequency according to the indoor environment temperature value and the outdoor environment temperature value.
10. An air conditioner, comprising: a computer readable storage medium storing a computer program and a packaged IC, the computer program being read by the packaged IC and executed by the packaged IC, the air conditioner implementing the method for controlling a minimum operating frequency of an inverter air conditioner according to any one of claims 1 to 8.
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