CN114777312B - Low-temperature refrigeration continuous operation control method and device, air conditioner and storage medium - Google Patents
Low-temperature refrigeration continuous operation control method and device, air conditioner and storage medium Download PDFInfo
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- CN114777312B CN114777312B CN202210534882.4A CN202210534882A CN114777312B CN 114777312 B CN114777312 B CN 114777312B CN 202210534882 A CN202210534882 A CN 202210534882A CN 114777312 B CN114777312 B CN 114777312B
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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
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/40—Vibration or noise prevention at outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/40—Damper positions, e.g. open or closed
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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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application provides a low-temperature refrigeration continuous operation control method, a device, an air conditioner and a storage medium, wherein the method comprises the following steps: in the air conditioner low-temperature refrigeration mode, the outdoor fan gear D is adjusted by sequentially dividing the high-pressure Ph of the compressor, the outdoor fan gear D and the compressor pressure ratio gamma by at most three stages, and is based on D=D Lower limit of The first trigger time of Ph < P4 and gamma < gamma 1 is used for executing linkage control on the outdoor fan gear D, the outdoor unit expansion valve and the indoor unit expansion valve; wherein P4 is a fourth preset high voltage value, D Lower limit of The first critical value is used for representing the lower limit of the pressure ratio for the lowest gear and gamma 1 of the outdoor fan. By the low-temperature refrigeration continuous operation control method, the device, the air conditioner and the storage medium, the purpose of continuous and stable operation of the outdoor fan can be realized even when the air conditioner operates in a refrigeration mode at a lower environment temperature.
Description
Technical Field
The application relates to the technical field of air conditioning, in particular to a low-temperature refrigeration continuous operation control method, a device, an air conditioner and a storage medium.
Background
At present, when the air conditioner operates in a refrigeration mode at a lower ambient temperature, the outdoor fan periodically reciprocates to start and stop operation so as to ensure the effective operation of the refrigeration mode of the air conditioner. The air conditioner is characterized in that in a low-temperature refrigeration scene, the air conditioner has small load demand and the outdoor heat exchanger is larger, when the compressor and the outdoor fan are both regulated to be in minimum operation, the actual refrigeration capacity still exceeds the load demand, and the outdoor fan can only be stopped to regulate and reduce refrigeration. However, after the outdoor fan is stopped, the outdoor heat exchanger cannot exchange heat with ambient air effectively, and over time, the outdoor fan must be started to meet the load demand.
Therefore, the outdoor fan can form periodic reciprocating start-stop operation, but the periodic start-stop operation can lead to significant fluctuation change of the air conditioner operation temperature and operation noise, and user comfort experience is affected.
Disclosure of Invention
In view of this, the technical problems to be solved by the present application are: the first aspect is to propose a low-temperature cooling continuous operation control method, so that the purpose of continuous and stable operation of the outdoor fan can be achieved even when the air conditioner operates in a cooling mode at a lower ambient temperature.
In order to solve the technical problem of the first aspect, the present application provides a method for controlling continuous operation of low temperature refrigeration, which comprises the following steps:
in the air conditioner low-temperature refrigeration mode, the outdoor fan gear D is adjusted by sequentially dividing the high-pressure Ph of the compressor, the outdoor fan gear D and the compressor pressure ratio gamma by at most three stages, and is based on D=D Lower limit of The first trigger time of Ph < P4 and gamma < gamma 1 is used for executing linkage control on the outdoor fan gear D, the outdoor unit expansion valve and the indoor unit expansion valve;
wherein P4 is a fourth preset high voltage value, D Lower limit of The first critical value is used for representing the lower limit of the pressure ratio for the lowest gear and gamma 1 of the outdoor fan.
By the low-temperature refrigeration continuous operation control method, the purpose of continuous and stable operation of the outdoor fan can be realized even when the air conditioner operates in a refrigeration mode at a lower environment temperature.
Preferably, in the air-conditioning low-temperature refrigeration mode, the method comprises the following specific implementation steps:
s1: the method comprises the steps of (1) regularly collecting high-pressure Ph;
s2: judging whether Ph > P3 is met, wherein P3 is a third preset high-voltage value larger than P4;
s3: if yes, the gear D of the outdoor fan is increased, and the step S1 is returned; if not, judging whether Ph is less than P4;
s4: if yes, executing step S5; if not, maintaining the gear D of the outdoor fan, and returning to the step S1;
s5: and (3) adjusting down or controlling the gear D of the outdoor fan in a linkage manner according to the triggering judgment of the first triggering moment, and returning to the step (S1).
The low-temperature refrigeration mode can ensure continuous and stable operation of the outdoor fan even if the low-temperature refrigeration mode is operated under the lower environment temperature covering the medium-low-temperature refrigeration scene, and can realize accurate control of the gear D of the outdoor fan, thereby avoiding the reliability risk of the compressor.
Preferably, step S5 includes the following specific implementation steps:
s51: judging that D is more than D Lower limit of Whether or not it is satisfied;
s52: if yes, the gear D of the outdoor fan is reduced, and the step S1 is returned; if not, judging whether gamma is less than gamma 1;
s53: if yes, the current moment satisfies the first trigger moment, and step S54 is executed; if not, the current moment does not meet the first trigger moment, and the step S55 is executed;
s54: executing linkage control on the gear D of the outdoor fan, the expansion valve of the outdoor unit and the expansion valve of the indoor unit, and returning to the step S1;
s55: the indoor and outdoor expansion valves maintain the conventional throttle adjustment mode, and return to step S1.
Steps S1-S5 are a set of closed loop cycle control, and steps S51-S55 are set in detail: and (3) regulating down or controlling the specific sub-circulation control of the gear D of the outdoor fan in a linkage manner according to the triggering judgment of the first triggering moment so as to accurately judge the first triggering moment and ensure the smooth circulation implementation of the whole set of closed-loop control.
Preferably, step S55 includes the following specific operation steps:
s551: judging whether gamma is more than gamma 2 or not, wherein gamma 2 is used for representing a second critical value of the lower limit of the pressure ratio, and gamma 2 is more than gamma 1;
s552: if yes, maintaining a conventional throttling adjustment mode by the indoor and outdoor expansion valves, and returning to the step S1; if not, go to step S553;
s553: the indoor and outdoor expansion valves maintain the current adjusting mode unchanged, and return to the step S1.
The method is beneficial to keeping a certain margin for the reliability control of the compressor, so that the pressure ratio is prevented from entering a too small area; in particular, the step S553 can be used for setting the throttle adjustment of the indoor expansion valve and the outdoor expansion valve, and the original adjustment mode can be followed within a certain inertia range, so that the alternate operation range applicable to the two throttle adjustment modes is enlarged, and the influence on other state parameters of the system is reduced.
Preferably, step S54 includes the steps of:
s541: the opening degree of the outdoor electronic expansion valve is reduced by delta EVO=eta 1 by gamma 1, and the opening degree of the indoor electronic expansion valve is increased by delta EVI=eta 2 by gamma 1, wherein eta 1 and eta 2 are coefficients;
s542: returning to step S1.
The pressure ratio gamma can be rapidly increased away from the first threshold value of gamma 1.
Preferably, the air conditioner refrigerating mode at least comprises a low-temperature refrigerating mode and a high-temperature refrigerating mode, and the method comprises the following identification operation steps:
s05: collecting outdoor environment temperature Ta in real time or at regular time;
s06: judging whether Ta is smaller than Ta2 or not, wherein Ta2 is a second preset temperature;
s07: if yes, go to step S09; if not, judging whether Ta is more than Ta1, wherein Ta1 is a first preset temperature higher than Ta 2;
s08: if yes, executing step S010; if not, executing step S011;
s09: operating the low-temperature refrigeration mode, and returning to the step S05;
s010: operating the high-temperature refrigeration mode and returning to the step S05;
s011: the current cooling mode is maintained unchanged and the process returns to step S05.
The method is beneficial to ensuring the running stability of the air conditioning system to a large extent, and simultaneously, the low-temperature refrigeration mode can be expanded to be suitable for medium-low-temperature refrigeration scenes, and the high-temperature refrigeration mode can be expanded to be suitable for medium-high-temperature refrigeration scenes.
Preferably, the high temperature cooling mode adjusts the outdoor fan gear D based only on a primary determination of the high pressure Ph.
The high-temperature refrigeration mode is used for adjusting the outdoor fan gear D only based on the primary judgment of the high-pressure Ph, so that the accurate control of the outdoor fan gear D can be easily realized, and the reliability risk of the compressor in the second aspect from the overhigh high-pressure Ph is avoided.
The technical problems to be solved by the application are as follows: a second aspect provides a low-temperature cooling continuous operation control device, and/or a third aspect provides an air conditioner, and/or a fourth aspect provides a computer-readable storage medium, so that the air conditioner can achieve the purpose of continuous and steady operation of an outdoor fan even when the cooling mode is operated at a lower ambient temperature.
To solve the above-mentioned second technical problem, the present application provides a low-temperature refrigeration continuous operation control device for executing the method according to any one of the embodiments of the first aspect, the device comprising:
the first judgment and adjustment module: the method is used for adjusting the outdoor fan gear D by dividing the high pressure Ph of the compressor, the outdoor fan gear D and the compressor pressure ratio gamma into at most three stages in sequence in the low-temperature refrigeration mode of the air conditioner;
and a second judgment and adjustment module: for in the judgment adjustment process of the first judgment adjustment module, based on d=d Lower limit of At the first trigger time of Ph < P4 and gamma < gamma 1Executing linkage control on the gear D of the outdoor fan, the expansion valve of the outdoor unit and the expansion valve of the indoor unit; wherein P4 is a fourth preset high voltage value, D Lower limit of The first critical value is used for representing the lower limit of the pressure ratio for the lowest gear and gamma 1 of the outdoor fan.
To solve the above-mentioned technical problem of the third aspect, the present application provides an air conditioner, which includes a computer readable storage medium storing a computer program and a processor, where the computer program is read and executed by the processor to implement the method according to any embodiment of the first aspect.
To solve the above-mentioned fourth technical problem, the present application provides a computer readable storage medium, where a computer program is stored, where the computer program is read and executed by a processor, and the method according to any embodiment of the first aspect is implemented.
Compared with the prior art, the low-temperature refrigeration continuous operation control method, the device, the air conditioner and the computer storage medium have the following beneficial effects:
1) The air conditioner can realize the purpose of continuous and stable operation of the outdoor fan even when the air conditioner runs in a refrigerating mode at a lower environment temperature, and meanwhile, the noise of a system refrigerant caused by frequent start and stop of the outdoor fan is avoided;
2) The fluctuation and change of the operation temperature and the operation noise of the air conditioner in a low-temperature refrigeration scene are obviously reduced, and the user comfort experience is improved;
3) For a refrigeration scene under any Ta value, different target control of the outdoor fan gear under lower ring temperature and higher ring temperature is realized through identifying the outdoor environment temperature, and the outdoor fan gear control is more accurate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 is a schematic plan view of an outdoor unit of an air conditioner according to embodiment 1 of the present application.
Detailed Description
In order to make the above objects, technical solutions and advantages of the present application more comprehensible, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments of the present application described herein are only some of the embodiments constituting the present application, which are intended to be illustrative of the present application and not limiting of the present application, and the embodiments of the present application and features of the embodiments may be combined with each other without conflict.
Example 1
Referring to fig. 1, the application provides a low-temperature refrigeration continuous operation control method, which comprises the following steps:
in the air conditioner low-temperature refrigeration mode, the outdoor fan gear D is adjusted by sequentially dividing the high-pressure Ph of the compressor, the outdoor fan gear D and the compressor pressure ratio gamma by at most three stages, and is based on D=D Lower limit of The first trigger time of Ph < P4 and gamma < gamma 1 is used for executing linkage control on the outdoor fan gear D, the outdoor unit expansion valve and the indoor unit expansion valve;
wherein P4 is a fourth preset high voltage value, D Lower limit of The first critical value is used for representing the lower limit of the pressure ratio for the lowest gear and gamma 1 of the outdoor fan.
Specifically, when the air conditioner operates in a refrigeration mode at a lower ambient temperature, the high pressure Ph continuously decreases in the process of the minimum operation of both the compressor and the outdoor fan, so that the pressure ratio γ decreases, and the risk of abrasion of the compressor increases. When the actual refrigerating capacity still exceeds the load demand, the air conditioner refrigeration can only be regulated down by stopping the outdoor fan intermittently in the prior art, and the high pressure Ph is prevented from continuously falling.
In the application, the air conditioner can be provided with a low-temperature refrigeration mode, in which the outdoor fan gear D is accurately regulated by dividing the high-pressure Ph, the outdoor fan gear D and the compressor pressure ratio gamma by at most three stages so as to strive to maintain the dynamic balance among the compressor frequency regulation down, the outdoor fan gear regulation down and the compressor reliability guarantee in the low-temperature refrigeration sceneAnd precisely identifying the first trigger moment when the dynamic balance is about to be dynamically broken in a mode of excessively low pressure ratio gamma, and executing linkage control on the outdoor fan gear D, the outdoor unit expansion valve and the indoor unit expansion valve so as to improve the pressure ratio gamma to be far from a first critical value of gamma 1, thereby continuously maintaining the compressor within a preset reliability range. The outdoor fan gear D can then at least still be d=d Lower limit of The method of the system is kept to operate so as to avoid shutdown, thereby effectively replacing the treatment mode of only intermittently stopping the outdoor fan in the prior art, and realizing the purpose of continuously and stably operating the outdoor fan even when the air conditioner operates in a refrigeration mode at a lower environment temperature.
Preferably, the air conditioner refrigerating mode at least comprises a low-temperature refrigerating mode and a high-temperature refrigerating mode, and the method comprises the following identification operation steps:
s05: collecting outdoor environment temperature Ta in real time or at regular time;
s06: judging whether Ta is smaller than Ta2 or not, wherein Ta2 is a second preset temperature;
s07: if yes, go to step S09; if not, judging whether Ta is more than Ta1, wherein Ta1 is a first preset temperature higher than Ta 2;
s08: if yes, executing step S010; if not, executing step S011;
s09: operating the low-temperature refrigeration mode, and returning to the step S05;
s010: operating the high-temperature refrigeration mode and returning to the step S05;
s011: the current cooling mode is maintained unchanged and the process returns to step S05.
Specifically, the air-conditioning refrigeration modes may include only a low-temperature refrigeration mode and a high-temperature refrigeration mode, and in the operation process of the air-conditioning refrigeration modes, the corresponding refrigeration mode can be selected to operate according to effective identification of the outdoor ambient temperature Ta. When the determination result in step S08 is no, that is, ta2 is less than or equal to Ta and less than or equal to Ta1, and considering that Ta2 and Ta1 are both preset critical temperature values, when the outdoor ambient temperature Ta is near any one of Ta2 and Ta1 and exhibits high-frequency low-amplitude fluctuation, the setting in step S011 can effectively avoid frequent switching of the air conditioning refrigeration mode, that is, the air conditioning refrigeration mode only needs to follow the previous original temperature identification result, and the previous refrigeration mode is kept unchanged, thereby being beneficial to ensuring the operation stability of the air conditioning system to a greater extent. Meanwhile, ta2 is more than or equal to Ta1 and corresponds to a medium-temperature refrigeration scene, so that the low-temperature refrigeration mode can be expanded to be suitable for the medium-low-temperature refrigeration scene, and the high-temperature refrigeration mode can be expanded to be suitable for the medium-high-temperature refrigeration scene. Of course, unless the outdoor ambient temperature Ta is changed drastically enough, the low-temperature refrigeration mode and the high-temperature refrigeration mode may jump, thereby ensuring that the automatic switching of the air-conditioning refrigeration mode is practically adapted to the extreme weather conditions.
As a preferred example of the present application, ta2 ε [15 ℃,20 ℃ ], ta1 ε [25 ℃,28 ℃ ]. Referring to national standard, 18 ℃ is the minimum refrigeration requirement, when the outdoor environment temperature Ta is smaller than the value, the refrigeration load requirement tends to be obviously reduced, and Ta2 epsilon [15 ℃,20 ℃ are set to correspond to the upper limit temperature of a low-temperature refrigeration scene in the application. Similarly, according to the reference value of the human body experience comfort temperature in the range of 25-28 ℃, when the outdoor environment temperature Ta is larger than the reference value, the cooling load demand tends to be obviously increased, and Ta1 epsilon [25 ℃,28 ℃ is set to correspond to the lower limit temperature of a high-temperature refrigeration scene in the application. And the interval transition value corresponding to Ta2 is less than or equal to Ta1 and at least spans 5 ℃, so that the running stability of the air conditioning system can be ensured to a large extent; and at most span 13 ℃, the application range of the low-temperature refrigeration mode for the middle-low temperature refrigeration scene is greatly expanded, and/or the application range of the high-temperature refrigeration mode for the middle-high temperature refrigeration scene is greatly expanded. The optimization setting can be carried out according to actual needs.
Preferably, the air conditioning cooling mode further includes a normal cooling mode, and before step S05, the method further includes the following identification operation steps:
s01: starting an air conditioner refrigerating mode;
s02: judging whether Ta2 is less than or equal to Ta 'isless than or equal to Ta1, wherein Ta' is the outdoor environment temperature at the moment when an air conditioner refrigeration mode is started to operate;
s03: if yes, operating a conventional refrigeration mode, and converting to step S05; if not, judging whether Ta is smaller than Ta2 or not;
s04: if yes, go to step S09; if not, step S010 is executed.
Specifically, when Ta2 is less than or equal to Ta' isless than or equal to Ta1, the air conditioner can select to operate in a normal refrigeration mode only. In the subsequent operation process of the air conditioner, as long as the temperature fluctuation of the outdoor ambient temperature Ta jumps out of the medium-temperature refrigeration scene with Ta2 being more than or equal to Ta being less than or equal to Ta1, the air conditioner refrigeration mode can be switched to one of the low-temperature refrigeration mode and the high-temperature refrigeration mode, and the air conditioner is not allowed to return to the conventional refrigeration mode again; otherwise, in the subsequent operation process of the air conditioner, the air conditioner only needs to continuously keep the operation of the conventional refrigeration mode.
Therefore, for a refrigeration scene under any Ta value, when the fluctuation range of the outdoor ambient temperature Ta is not jumped out of the medium-temperature refrigeration scene with Ta2 being less than or equal to Ta1, the air conditioner only needs to adopt a conventional refrigeration mode, so that the accurate gear control of the outdoor fan under continuous and stable operation can be ensured; on the contrary, the air conditioner can adopt a more reasonable low-temperature refrigeration mode and/or a high-temperature refrigeration mode, namely, the accurate gear control of the outdoor fan under continuous and stable operation is ensured through different target control at the middle-low ring temperature and the middle-high ring temperature.
Preferably, in the air-conditioning low-temperature refrigeration mode, the method comprises the following specific implementation steps:
s1: the method comprises the steps of (1) regularly collecting high-pressure Ph;
s2: judging whether Ph > P3 is met, wherein P3 is a third preset high-voltage value larger than P4;
s3: if yes, the gear D of the outdoor fan is increased, and the step S1 is returned; if not, judging whether Ph is less than P4;
s4: if yes, executing step S5; if not, maintaining the gear D of the outdoor fan, and returning to the step S1;
s5: and (3) adjusting down or controlling the gear D of the outdoor fan in a linkage manner according to the triggering judgment of the first triggering moment, and returning to the step (S1).
Specifically, as described above, the low-temperature cooling mode is not only applicable to low-temperature cooling scenes in which Ta is smaller than Ta2, but also can be extended to medium-low-temperature cooling scenes in which Ta is smaller than or equal to Ta 1. Under the low-temperature refrigeration scene, the outdoor fan gear D can generate corresponding increasing, maintaining and reducing demands, so that the accurate adjustment of the outdoor fan gear D is always matched with the cold load fluctuation of an air conditioning system under the low-temperature refrigeration scene. The application adjusts the outdoor fan gear D by 'dividing the high pressure Ph of the compressor, the outdoor fan gear D and the compressor pressure ratio gamma by at most three stages' in sequence, but only the first stage of division of the high pressure Ph is needed in practice, so that the accurate adjusting requirement for the rotating speed of the outdoor fan can be accurately judged. By way of example:
in the application, P4E [11bar,13bar ] can be set, the corresponding refrigerant saturation temperature is 10-15 ℃, which is about 5 ℃ lower than Ta 2E [15 ℃,20 ℃ and is basically equivalent to the user set temperature in a low-temperature refrigeration scene. When the high pressure Ph is smaller than P4, the system cooling load demand tends to be obviously reduced, the system cooling load demand is basically visible without cooling load demand, the heat exchange temperature difference is basically not needed, the rotating speed demand of the outdoor fan is correspondingly obviously reduced, and the down shift treatment is needed for the gear D of the outdoor fan.
Similarly, in the present application, P3E [14bar,16bar ] can be set, and the corresponding refrigerant saturation temperature is about 20 ℃ to 25 ℃ which is about 5 ℃ higher than Ta 2E [15 ℃,20 ℃. Considering that the rotating speed of the outdoor fan has obvious influence on the high-pressure Ph in a medium-low temperature refrigeration scene, the heat exchange temperature difference of the system is only required to be maintained at about 5 ℃ by taking Ta2 as a reference. When the high pressure Ph is greater than P3, the system cooling load demand tends to be obviously increased, the system heat exchange temperature difference is obviously increased, the corresponding outdoor fan rotating speed demand is obviously increased, and the upshift treatment is required for the outdoor fan gear D.
When P4 is less than or equal to Ph and less than or equal to P3, the fluctuation range of the system cooling load is moderate, and the gear D of the outdoor fan only needs to be maintained. Meanwhile, in view of the medium-low temperature refrigeration scene corresponding to the low-temperature refrigeration mode, the outdoor fan gear D generally has a larger upshift margin, so that when the result in the step S3 is yes, upshift processing can be directly performed on the outdoor fan gear D. In contrast, in the case of a yes result in step S4, onlyThe corresponding reduction of the rotating speed requirement of the outdoor fan is judged to be obvious, but the gear D of the outdoor fan cannot be directly downshifted. Because the outdoor fan gear D may be already at D Lower limit of The lowest gear of the outdoor fan is the problem that the outdoor fan can not fall under the premise of ensuring continuous and stable operation, so that the gear D of the outdoor fan is regulated or controlled in a linkage mode according to the trigger judgment of the first trigger moment in the step S5. Therefore, the low-temperature refrigeration mode can ensure continuous and stable operation of the outdoor fan even if the low-temperature refrigeration mode is operated under the lower environment temperature covering the medium-low-temperature refrigeration scene, and can realize accurate control of the gear D of the outdoor fan, thereby avoiding the reliability risk of the compressor.
Preferably, step S5 includes the following specific implementation steps:
s51: judging that D is more than D Lower limit of Whether or not it is satisfied;
s52: if yes, the gear D of the outdoor fan is reduced, and the step S1 is returned; if not, judging whether gamma is less than gamma 1;
s53: if yes, the current moment satisfies the first trigger moment, and step S54 is executed; if not, the current moment does not meet the first trigger moment, and the step S55 is executed;
s54: executing linkage control on the gear D of the outdoor fan, the expansion valve of the outdoor unit and the expansion valve of the indoor unit, and returning to the step S1;
s55: the indoor and outdoor expansion valves maintain the conventional throttle adjustment mode, and return to step S1.
Specifically, steps S1-S5 are a set of closed loop circulation control, assuming that the outdoor fan gear D in step S51 is only higher than D Lower limit of A slightly higher gear, the step S52 is immediately followed by the step S1 to select the next round of cycle control, i.e. the round of cycle control corresponds to: the high-pressure Ph of the compressor and the second level division of the outdoor fan gear D are sequentially carried out to adjust the outdoor fan gear D. As the outdoor fan gear D is reduced by one gear, the effective heat exchange capacity of the outdoor heat exchanger is reduced, and the high pressure Ph is increased with a high probability. And during the next cycle control, when Ph < P4, d=d Lower limit of Three-stage division of gamma < gamma 1When the control is judged to be sequentially met, the first trigger time is met at the current time, and then linkage control of the outdoor fan gear D, the outdoor unit expansion valve and the indoor unit expansion valve in the step S54 is executed so as to improve the pressure ratio gamma to be far away from a first critical value of gamma 1; on the contrary, the indoor and outdoor expansion valves only need to follow the conventional throttling adjustment mode (hereinafter referred to as the first throttling adjustment mode) under the cooperative control of the compressor frequency, corresponding to step S55.
Preferably, step S55 includes the following specific operation steps:
s551: judging whether gamma is more than gamma 2 or not, wherein gamma 2 is used for representing a second critical value of the lower limit of the pressure ratio, and gamma 2 is more than gamma 1;
s552: if yes, maintaining a conventional throttling adjustment mode by the indoor and outdoor expansion valves, and returning to the step S1; if not, go to step S553;
s553: the indoor and outdoor expansion valves maintain the current adjusting mode unchanged, and return to the step S1.
Specifically, in step S54, the linkage control of the outdoor fan gear D, the outdoor unit expansion valve, and the indoor unit expansion valve may be simply referred to as a second throttling adjustment mode for the indoor and outdoor expansion valves, which aims to increase the pressure ratio γ away from the first critical value of γ1, and may not be throttled much compared with the first throttling adjustment mode. Because steps S1-S5 are a set of closed loop circulation control, the first throttling adjustment mode and the second throttling adjustment mode can alternately run, so that different set targets can be achieved. Therefore, when the step S55 is subdivided into steps S551-S553 with gamma 2 introduced, a certain margin is reserved for the reliability control of the compressor, so that the pressure ratio is prevented from entering the over-cell; in particular, the step S553 can be used for setting the throttle adjustment of the indoor expansion valve and the outdoor expansion valve, and the original adjustment mode can be followed within a certain inertia range, so that the alternate operation range applicable to the two throttle adjustment modes is enlarged, and the influence on other state parameters of the system is reduced.
As a preferred example of the application, γ1 ε [2.5,3], γ2 ε [3.5,4]. The minimum pressure ratio is usually required to be 2-2.5 in the specification of the compressor, so that gamma 1E [2.5,3] is set in the application, the pressure ratio can be prevented from entering a too small area so as to abrade the compressor; and for setting γ2∈ [3.5,4], a certain margin can be further reserved for reliability control of the compressor so as to reduce the influence on other state parameters of the system, for example:
in the third-stage judging process of gamma, when the judging result is gamma > gamma 2, the pressure ratio gamma is higher, and the indoor and outdoor expansion valves do not need to make any change by means of a second throttling regulation mode at all; and when the judgment result is that gamma is not less than gamma and not more than gamma 2, the pressure ratio gamma is in a controllable range, and the current adjusting mode is maintained unchanged only by the step S553.
Preferably, step S54 includes the steps of:
s541: the opening degree of the outdoor electronic expansion valve is reduced by delta EVO=eta 1 by gamma 1, and the opening degree of the indoor electronic expansion valve is increased by delta EVI=eta 2 by gamma 1, wherein eta 1 and eta 2 are coefficients;
s542: returning to step S1.
Specifically, the opening degree of the outdoor electronic expansion valve is reduced to increase the high pressure Ph, and the opening degree of the indoor electronic expansion valve is increased to decrease the low pressure Ps, so that the pressure ratio γ can be rapidly increased to be far from the first critical value of γ1 due to the pressure ratio γ=ph/Ps. The sampling positions of the high pressure Ph and the low pressure Ps may be shown in fig. 1, where Δevo and/or Δevi may be adjusted according to the pressure ratio variation, and the coefficients η1 and/or η2 may be selected according to experimental experience, and generally are between 1 and 5.
Preferably, the high temperature cooling mode adjusts the outdoor fan gear D based only on a primary determination of the high pressure Ph.
In particular, the reliability risk of the compressor comes mainly from two aspects, namely as described above: too low a pressure ratio gamma can cause wear to the compressor; the second aspect is that the high pressure Ph is too high, beyond the system high pressure limit, and also wears the compressor. As described in the background art, when the air conditioner operates in the cooling mode at a lower ambient temperature, the outdoor fan will periodically and reciprocally start and stop, i.e. the outdoor fan is prevented from continuously increasing the high pressure Ph to an excessive level over time after stopping, thereby bringing the reliability risk of the compressor of the second aspect.
In the application, through the operation setting of the low-temperature refrigeration mode, the continuous and stable operation of the outdoor fan is ensured at least in a medium-low temperature refrigeration scene, and the reliability risks of the compressor in the two aspects are effectively avoided. In the middle-high temperature refrigeration scene corresponding to the high-temperature refrigeration mode, the compressor does not have the reliability risk from the first aspect with the excessively low pressure ratio gamma, so the high-temperature refrigeration mode adjusts the outdoor fan gear D only based on the first-stage judgment of the high-pressure Ph, the accurate control of the outdoor fan gear D can be easily realized, and the compressor is prevented from generating the reliability risk from the second aspect with the excessively high pressure Ph.
As one preferred embodiment of the present application, in the air conditioner high temperature cooling mode, the method comprises the following specific implementation steps:
s1': the method comprises the steps of (1) regularly collecting high-pressure Ph;
s2': judging whether Ph > P1 is met, wherein P1 is a first preset high-voltage value;
s3': if yes, the gear D of the outdoor fan is increased, and the step S1' is returned; if not, judging whether Ph is smaller than P2, wherein P2 is a second preset high-voltage value smaller than P1;
s4': if yes, the gear D of the outdoor fan is reduced, and the step S1' is returned; if not, maintaining the gear D of the outdoor fan, and returning to the step S1'.
Specifically, as described above, the high-temperature cooling mode is not only applicable to high-temperature cooling scenes with Ta > Ta1, but also can be extended to medium-high-temperature cooling scenes with Ta > Ta 2. Under the medium-high temperature refrigeration scene, the outdoor fan gear D can generate corresponding increasing, maintaining and reducing demands, so that the accurate adjustment of the outdoor fan gear D is always matched with the cold load fluctuation of an air conditioning system under the medium-high temperature refrigeration scene. Under the high-temperature refrigeration mode, only need through the target control to high pressure Ph, can easily realize the accurate control to outdoor fan gear D, and avoid the compressor to produce the too high reliability risk of high pressure Ph, for example:
in the application, P1E [21bar,23bar ] can be set, the corresponding refrigerant saturation temperature is 35-38 ℃, and the temperature is about 10 ℃ higher than the comfort temperature Ta 1E [25 ℃,28 ℃. Considering that the influence of the rotation speed of the outdoor fan on the high-pressure Ph is not obvious compared with the influence of the rotation speed of the outdoor fan on the medium-low temperature refrigeration scene, the heat exchange temperature difference of the system needs to be maintained at about 10 ℃ by taking Ta1 as a reference. When the high pressure Ph is greater than P1, the system cooling load demand tends to be obviously increased, the system heat exchange temperature difference is obviously increased, the corresponding outdoor fan rotating speed demand is obviously increased, and the upshift treatment is required for the outdoor fan gear D.
Similarly, in the application, P2E [16bar,18bar ] can be set, the corresponding refrigerant saturation temperature is 25-28 ℃, and compared with the comfort temperature Ta 1E [25 ℃,28 ℃ for human body experience, the temperature is equivalent to the user set temperature in a high-temperature refrigeration scene. When the high pressure Ph is smaller than P2, the system cooling load demand tends to be obviously reduced, the system cooling load demand is basically visible without cooling load demand, the heat exchange temperature difference is basically not needed, the rotating speed demand of the outdoor fan is correspondingly obviously reduced, and the down shift treatment is needed for the gear D of the outdoor fan.
When P2 is smaller than or equal to Ph and smaller than or equal to P1, the fluctuation range of the system cooling load is moderate, and the gear D of the outdoor fan only needs to be maintained. Similarly, the steps S1'-S4' are also a set of closed loop control, which is logically much simpler than the closed loop control of the steps S1-S5, and will not be described in detail herein. Meanwhile, referring to steps S01-S011, the two sets of closed loop circulation control can automatically jump and switch when the specific conditions are met, and redundant description is omitted.
However, it should be noted that, when the air conditioning system is designed, the outdoor fan gear D will generally have a larger operation margin, i.e. when the outdoor fan gear D has been increased to the highest gear D of the outdoor fan in the middle-high temperature refrigeration scenario corresponding to the high-temperature refrigeration mode Upper limit of The high pressure Ph will also drop significantly with it, and subsequently the second reliability risk of the compressor from too high a high pressure Ph can be substantially eliminated.
Therefore, the high-temperature refrigeration mode can easily realize the accurate control of the gear D of the outdoor fan even if the high-temperature refrigeration mode is operated under the higher environmental temperature covering the medium-high-temperature refrigeration scene, and the reliability risk that the high-pressure Ph is too high is avoided.
Example 2
Referring to fig. 1, the present application also provides a cryogenically sustained-operation control device for performing the method described in embodiment 1, the device comprising:
the first judgment and adjustment module: the method is used for adjusting the outdoor fan gear D by dividing the high pressure Ph of the compressor, the outdoor fan gear D and the compressor pressure ratio gamma into at most three stages in sequence in the low-temperature refrigeration mode of the air conditioner;
and a second judgment and adjustment module: for in the judgment adjustment process of the first judgment adjustment module, based on d=d Lower limit of The first trigger time of Ph < P4 and gamma < gamma 1 is used for executing linkage control on the outdoor fan gear D, the outdoor unit expansion valve and the indoor unit expansion valve; wherein P4 is a fourth preset high voltage value, D Lower limit of The first critical value is used for representing the lower limit of the pressure ratio for the lowest gear and gamma 1 of the outdoor fan.
The present application also provides an air conditioner comprising a computer readable storage medium storing a computer program and a processor, which when read and run by the processor, implements the method as described in embodiment 1.
The present application also provides a computer readable storage medium storing a computer program which, when read and executed by a processor, implements a method as described in embodiment 1.
Specifically, it will be understood by those skilled in the art that the low-temperature cooling continuous operation control device, the air conditioner, and the computer readable storage medium provided in embodiment 2 may be implemented by combining software and hardware as described in embodiment 1. Any one of the above-mentioned low-temperature cooling continuous operation control device, air conditioner, and computer readable storage medium may refer to the description of the low-temperature cooling continuous operation control method in embodiment 1 for information interaction, execution process, etc., and will not be described in detail herein.
Although the present application is disclosed above, the present application is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the application, and the scope of the application should be assessed accordingly to that of the appended claims.
Claims (7)
1. A method for controlling continuous operation of low temperature refrigeration, the method comprising:
in the air conditioner low-temperature refrigeration mode, the outdoor fan gear D is adjusted by sequentially dividing the high-pressure Ph of the compressor, the outdoor fan gear D and the compressor pressure ratio gamma by at most three stages, and is based on D=D Lower limit of The first trigger time of Ph < P4 and gamma < gamma 1 is used for executing linkage control on the outdoor fan gear D, the outdoor unit expansion valve and the indoor unit expansion valve;
wherein P4 is a fourth preset high voltage value, D Lower limit of The first critical value is the lowest gear and gamma 1 of the outdoor fan and used for representing the lower limit of the pressure ratio;
the specific implementation steps are as follows:
s1: the method comprises the steps of (1) regularly collecting high-pressure Ph;
s2: judging whether Ph > P3 is met, wherein P3 is a third preset high-voltage value larger than P4;
s3: if yes, the gear D of the outdoor fan is increased, and the step S1 is returned; if not, judging whether Ph is less than P4;
s4: if yes, executing step S5; if not, maintaining the gear D of the outdoor fan, and returning to the step S1;
s5: according to the triggering judgment of the first triggering moment, the gear D of the outdoor fan is regulated down or controlled in a linkage mode, and the step S1 is returned;
step S5 further includes the following specific implementation steps:
s51: judging that D is more than D Lower limit of Whether or not it is satisfied;
s52: if yes, the gear D of the outdoor fan is reduced, and the step S1 is returned; if not, judging whether gamma is less than gamma 1;
s53: if yes, the current moment satisfies the first trigger moment, and step S54 is executed; if not, the current moment does not meet the first trigger moment, and the step S55 is executed;
s54: executing linkage control on the gear D of the outdoor fan, the expansion valve of the outdoor unit and the expansion valve of the indoor unit, and returning to the step S1;
s55: the indoor and outdoor expansion valves maintain a conventional throttling adjustment mode, and return to the step S1;
step S54 further includes the following specific implementation steps:
s541: the opening degree of the outdoor electronic expansion valve is reduced by delta EVO=eta 1 by gamma 1, and the opening degree of the indoor electronic expansion valve is increased by delta EVI=eta 2 by gamma 1, wherein eta 1 and eta 2 are coefficients;
s542: returning to step S1.
2. The method of claim 1, wherein step S55 includes the following steps:
s551: judging whether gamma is more than gamma 2 or not, wherein gamma 2 is used for representing a second critical value of the lower limit of the pressure ratio, and gamma 2 is more than gamma 1;
s552: if yes, maintaining a conventional throttling adjustment mode by the indoor and outdoor expansion valves, and returning to the step S1; if not, go to step S553;
s553: the indoor and outdoor expansion valves maintain the current adjusting mode unchanged, and return to the step S1.
3. The method according to claim 1 or 2, wherein the air-conditioning cooling mode includes at least two of a low-temperature cooling mode and a high-temperature cooling mode, the method further comprising the step of identifying operation as follows:
s05: collecting outdoor environment temperature Ta in real time or at regular time;
s06: judging whether Ta is smaller than Ta2 or not, wherein Ta2 is a second preset temperature;
s07: if yes, go to step S09; if not, judging whether Ta is more than Ta1, wherein Ta1 is a first preset temperature higher than Ta 2;
s08: if yes, executing step S010; if not, executing step S011;
s09: operating the low-temperature refrigeration mode, and returning to the step S05;
s010: operating the high-temperature refrigeration mode and returning to the step S05;
s011: the current cooling mode is maintained unchanged and the process returns to step S05.
4. A cryogenically continuous operation control method according to claim 3 wherein the high temperature refrigeration mode adjusts the outdoor fan gear D based on only one level of determination of the high pressure Ph.
5. A cryogenically sustained-operation control apparatus for performing the method as recited in any one of claims 1 to 4, the apparatus comprising:
the first judgment and adjustment module: the method is used for adjusting the outdoor fan gear D by dividing the high pressure Ph of the compressor, the outdoor fan gear D and the compressor pressure ratio gamma into at most three stages in sequence in the low-temperature refrigeration mode of the air conditioner;
and a second judgment and adjustment module: for in the judgment adjustment process of the first judgment adjustment module, based on d=d Lower limit of The first trigger time of Ph < P4 and gamma < gamma 1 is used for executing linkage control on the outdoor fan gear D, the outdoor unit expansion valve and the indoor unit expansion valve; wherein P4 is a fourth preset high voltage value, D Lower limit of The first critical value is used for representing the lower limit of the pressure ratio for the lowest gear and gamma 1 of the outdoor fan.
6. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program implementing the method of any one of claims 1-4 when read and run by the processor.
7. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when read and run by a processor, implements the method according to any of claims 1-4.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000041340A (en) * | 1998-12-22 | 2000-07-15 | 황한규 | Protector for compressor of air conditioner |
| JP2002130770A (en) * | 2000-10-30 | 2002-05-09 | Mitsubishi Electric Corp | Refrigerating cycle device and its control method |
| CN104132431A (en) * | 2014-08-19 | 2014-11-05 | 广东志高暖通设备股份有限公司 | Air cooling air-conditioner system and control method thereof |
| CN105333563A (en) * | 2014-07-29 | 2016-02-17 | 海信（山东）空调有限公司 | Refrigeration control method and device and air conditioner |
| CN106839294A (en) * | 2017-01-17 | 2017-06-13 | 广东美的暖通设备有限公司 | Control method and device when multiple on-line system and its cryogenic refrigeration |
| CN109099556A (en) * | 2018-08-27 | 2018-12-28 | 海信（山东）空调有限公司 | Low temperature refrigeration of air conditioner control method and air conditioner |
| CN109945427A (en) * | 2019-03-12 | 2019-06-28 | 珠海格力电器股份有限公司 | Air conditioning equipment control method and device, storage medium and air conditioning equipment |
| CN111141009A (en) * | 2019-12-31 | 2020-05-12 | Tcl空调器(中山)有限公司 | Refrigeration control method and device and storage medium |
| CN112283873A (en) * | 2020-10-26 | 2021-01-29 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN113007832A (en) * | 2021-04-20 | 2021-06-22 | 宁波奥克斯电气股份有限公司 | Low-temperature refrigeration control method and device and air conditioner |
| CN113063216A (en) * | 2020-01-02 | 2021-07-02 | 青岛海尔空调电子有限公司 | Rotating speed control method of air conditioner external fan |
| CN113587336A (en) * | 2021-06-25 | 2021-11-02 | 宁波奥克斯电气股份有限公司 | Air conditioner low-temperature refrigeration continuous operation control method and device and air conditioner |
| CN113819570A (en) * | 2021-10-20 | 2021-12-21 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioning system high pressure calculation method and multi-connected air conditioning system |
-
2022
- 2022-05-17 CN CN202210534882.4A patent/CN114777312B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000041340A (en) * | 1998-12-22 | 2000-07-15 | 황한규 | Protector for compressor of air conditioner |
| JP2002130770A (en) * | 2000-10-30 | 2002-05-09 | Mitsubishi Electric Corp | Refrigerating cycle device and its control method |
| CN105333563A (en) * | 2014-07-29 | 2016-02-17 | 海信（山东）空调有限公司 | Refrigeration control method and device and air conditioner |
| CN104132431A (en) * | 2014-08-19 | 2014-11-05 | 广东志高暖通设备股份有限公司 | Air cooling air-conditioner system and control method thereof |
| CN106839294A (en) * | 2017-01-17 | 2017-06-13 | 广东美的暖通设备有限公司 | Control method and device when multiple on-line system and its cryogenic refrigeration |
| CN109099556A (en) * | 2018-08-27 | 2018-12-28 | 海信（山东）空调有限公司 | Low temperature refrigeration of air conditioner control method and air conditioner |
| CN109945427A (en) * | 2019-03-12 | 2019-06-28 | 珠海格力电器股份有限公司 | Air conditioning equipment control method and device, storage medium and air conditioning equipment |
| CN111141009A (en) * | 2019-12-31 | 2020-05-12 | Tcl空调器(中山)有限公司 | Refrigeration control method and device and storage medium |
| CN113063216A (en) * | 2020-01-02 | 2021-07-02 | 青岛海尔空调电子有限公司 | Rotating speed control method of air conditioner external fan |
| CN112283873A (en) * | 2020-10-26 | 2021-01-29 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| CN113007832A (en) * | 2021-04-20 | 2021-06-22 | 宁波奥克斯电气股份有限公司 | Low-temperature refrigeration control method and device and air conditioner |
| CN113587336A (en) * | 2021-06-25 | 2021-11-02 | 宁波奥克斯电气股份有限公司 | Air conditioner low-temperature refrigeration continuous operation control method and device and air conditioner |
| CN113819570A (en) * | 2021-10-20 | 2021-12-21 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioning system high pressure calculation method and multi-connected air conditioning system |
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