CN114754475B - Air conditioner operation control method, operation device, air conditioner and storage medium - Google Patents

Air conditioner operation control method, operation device, air conditioner and storage medium Download PDF

Info

Publication number
CN114754475B
CN114754475B CN202210550638.7A CN202210550638A CN114754475B CN 114754475 B CN114754475 B CN 114754475B CN 202210550638 A CN202210550638 A CN 202210550638A CN 114754475 B CN114754475 B CN 114754475B
Authority
CN
China
Prior art keywords
compressor
temperature
fan
frequency
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210550638.7A
Other languages
Chinese (zh)
Other versions
CN114754475A (en
Inventor
谢朝阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Envicool Technology Co Ltd
Original Assignee
Shenzhen Envicool Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Envicool Technology Co Ltd filed Critical Shenzhen Envicool Technology Co Ltd
Priority to CN202210550638.7A priority Critical patent/CN114754475B/en
Publication of CN114754475A publication Critical patent/CN114754475A/en
Application granted granted Critical
Publication of CN114754475B publication Critical patent/CN114754475B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—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
    • F24F11/65—Electronic processing for selecting an operating mode
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • 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

Landscapes

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

Abstract

The invention discloses an air conditioner operation control method, which is used for judging whether the current operation frequency of a compressor is smaller than the low-load reference frequency of the compressor; and if the current operating frequency of the compressor is smaller than the low-load reference frequency of the compressor, controlling the operation of the external fan based on an external fan offset curve, wherein the external fan offset curve is an offset curve obtained after the external fan operation reference curve is offset by using a preset offset. The size and the refrigerant quantity of the two devices cannot be changed after the air conditioner is produced, and electronic components such as the heat dissipation fan, the throttling element and the like are controlled in a sectional manner in control logic, so that the output of the external fan is limited when the air conditioner runs at low speed, the heat dissipation capacity output of the air conditioner is indirectly limited, and the aim of further reducing the air conditioner capacity output is achieved. In summary, the air conditioner operation control method can effectively solve the problem that the output of the air conditioner is difficult to reduce at present.

Description

Air conditioner operation control method, operation device, air conditioner and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner operation control method, an air conditioner operation device adopting the control method, an air conditioner adopting the control method and a computer readable storage medium storing the control method.
Background
The existing low-load scheme is to calculate the refrigerating requirement of the air conditioner by adopting the temperature in the cabinet, and the low-load of the air conditioner is realized by reducing the running frequency of the compressor and limiting the capacity output of the compressor. Although the output of the air conditioning capacity can be limited to a certain extent by the mode, the output is often limited by the minimum running frequency of the compressor and the heat dissipation capacity of the two compressors, so that the low-load capacity of the air conditioning is difficult to continuously decrease after being reduced to a certain extent; meanwhile, the outer fan of the air conditioner with small cooling capacity is often controlled to operate by adopting a mode of detecting the condensation temperature by the thermistor, and the mode can not truly reflect the high-pressure change of the system, namely, the condition that the condensation temperature in the low-operation process and the condensation temperature in the normal operation process are almost different is detected by adopting the condensation temperature mode detected by the thermistor, at the moment, the low-load outer fan still operates at a high rotating speed, the outdoor side heat dissipation capacity still can be quite large, and finally, the air conditioner is difficult to achieve the expected low-load effect.
In summary, how to effectively solve the problem that it is difficult to reduce the output of the air conditioning capability at present is a urgent need for those skilled in the art.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide an air conditioner operation control method that can effectively solve the problem that it is difficult to reduce the capacity output of an air conditioner at present, a second object of the present invention is to provide an air conditioner operation device employing the above control method, a third object of the present invention is to provide an air conditioner employing the above control method, and a fourth object of the present invention is to provide a computer readable storage medium storing the above control method.
In order to achieve the first object, the present invention provides the following technical solutions:
an air conditioner operation control method, comprising:
judging whether the current operating frequency of the compressor is smaller than the low-load reference frequency of the compressor;
And if the current operating frequency of the compressor is smaller than the low-load reference frequency of the compressor, controlling the operation of the external fan based on an external fan offset curve, wherein the external fan offset curve is an offset curve obtained after the external fan operation reference curve is offset by using a preset offset.
The size and the refrigerant quantity of the two devices cannot be changed after the air conditioner is produced, and the external fan is controlled from the control logic in the air conditioner operation control method, so that the external fan operates according to an offset curve obtained after the offset of an external fan operation reference curve, the rotating speed of the external fan is reduced, and the heat radiation capacity is reduced, thereby indirectly limiting the heat radiation capacity output of the air conditioner condenser by limiting the output of the external fan when the air conditioner is in low operation, and further achieving the aim of further reducing the air conditioner capacity output. In summary, the air conditioner operation control method can effectively solve the problem that the output of the air conditioner is difficult to reduce at present.
Preferably, after determining whether the current operating frequency of the compressor is less than the low-load reference frequency of the compressor, the method further comprises:
And if the current compressor running frequency is not less than the compressor low-load reference frequency, controlling the running of the external fan based on the external fan running reference curve.
Preferably, after controlling the operation of the external fan based on the external fan offset curve if the current compressor operation frequency is less than the compressor low-load reference frequency, the method further comprises:
Judging whether the current running frequency of the compressor is smaller than the sum of the low-load reference frequency of the compressor and a preset return difference frequency;
If the current compressor running frequency is smaller than the sum of the low-load reference frequency of the compressor and the preset return difference frequency, controlling the running of the external fan based on the external fan offset curve, and re-jumping to the step of judging whether the current compressor running frequency is smaller than the sum of the low-load reference frequency of the compressor and the preset return difference frequency;
And if the current compressor running frequency is not less than the sum of the compressor low-load reference frequency and the preset return difference frequency, controlling the external fan to run based on the external fan running reference curve, and re-jumping to the step of judging whether the current compressor running frequency is less than the compressor low-load reference frequency.
Preferably, if the current compressor operation frequency is not less than the compressor low-load reference frequency, controlling the operation of the external fan based on the external fan operation reference curve, and further comprising:
And if the current compressor running frequency is not smaller than the compressor low-load reference frequency, controlling the external fan to run based on the external fan running reference curve, and restarting to judge whether the current compressor running frequency is smaller than the compressor low-load reference frequency.
Preferably, before determining whether the current operating frequency of the compressor is less than the low-load reference frequency of the compressor, the method further comprises:
and judging whether the power is firstly electrified, if so, judging whether the running frequency of the compressor is smaller than the low-load reference frequency of the compressor.
Preferably, the controlling the operation of the external fan based on the external fan operation reference curve includes:
Judging the current condensation temperature;
If the current condensing temperature is smaller than the upper limit point temperature of the outer fan and is larger than or equal to the opening point temperature of the outer fan, controlling the rotating speed of the outer fan to linearly adjust between the lower limit speed of the outer fan and the upper limit speed of the outer fan, wherein the linear adjustment is that the rotating speed of the outer fan is increased along with the increase of the condensing temperature;
if the current condensing temperature is smaller than the noise limiting point temperature of the outer fan and is larger than or equal to the upper limiting point temperature of the outer fan, controlling the rotating speed of the outer fan to be equal to the upper limiting point temperature of the outer fan, and operating at a constant speed;
if the current condensing temperature is smaller than the full-speed point temperature of the outer fan and is larger than or equal to the noise limiting point temperature of the outer fan, controlling the rotating speed of the outer fan to linearly adjust between the upper speed limit of the outer fan and the full speed of the outer fan, wherein the linear adjustment is that the rotating speed of the outer fan is increased along with the increase of the condensing temperature;
If the current condensing temperature of the external fan is higher than the full-speed point temperature of the external fan, controlling the rotating speed of the external fan to be the full-speed of the external fan, and operating at a constant speed;
If the current condensing temperature is smaller than the temperature of the starting point of the external fan and is larger than or equal to the temperature of the stopping point of the external fan, controlling the rotating speed of the external fan to be equal to the lower limit speed of the external fan, and operating at a constant speed;
If the current condensing temperature is smaller than the stopping point temperature of the outer fan, controlling the outer fan to stop running;
The temperature of the stopping point of the external fan, the temperature of the starting point of the external fan, the temperature of the upper limit point of the external fan, the temperature of the noise limit point of the external fan and the temperature of the full speed point of the external fan are sequentially increased, and the temperature of the full speed point of the external fan is correspondingly set according to the running requirement of the external fan.
Preferably, the controlling the operation of the external fan based on the external fan operation reference curve includes:
Judging the rotating speed of the external fan which is increased along with the current condensing temperature; and if the rotating speed of the external fan is increased along with the increase of the condensing temperature to the noise limit value of the external fan, controlling the external fan to run at a stable speed, and after the condensing temperature continues to be increased by a preset section of temperature value range, controlling the rotating speed of the external fan to be increased along with the increase of the condensing temperature.
Preferably, before said determining whether the current compressor operating frequency is less than the compressor low load reference frequency, it includes:
judging whether the current return air temperature in the cabinet is greater than the refrigeration set point temperature or not and adding the product of the return difference temperature and the refrigeration opening requirement;
If the current in-cabinet return air temperature is greater than the refrigeration set point temperature and the product of the return difference temperature and the refrigeration starting requirement is added, controlling the air conditioner to start up and operate, controlling the inner fan to operate based on an inner fan operation curve, controlling the outer fan to operate based on an outer fan curve, and controlling the compressor to operate based on a compressor operation curve.
Preferably, after said determining whether the current in-cabinet return air temperature is greater than the refrigeration set point temperature and adding the product of the return difference temperature and the refrigeration on demand, further comprises:
If the current return air temperature in the cabinet is greater than the refrigeration set point temperature and the product of the return difference temperature and the refrigeration opening requirement is added, controlling the EEV to keep the preset valve step for 2.5 to 3.5 minutes, and performing PID (proportion integration differentiation) adjustment on the air conditioner based on the target superheat degree; wherein, carry out PID to the air conditioner based on target superheat degree and adjust includes:
judging the size of T 1-T2;
If T-DeltaT 0'＜T1-T2＜T+ΔT0', controlling the EEV to keep the current valve step inactive;
if T-DeltaT 1'＜T1-T2＜T+ΔT1' and T 1-T2 > T, controlling the EEV to increase the valve step at a first step rate;
If T-DeltaT 1'＜T1-T2＜T+ΔT1' and T 1-T2 < T, controlling the EEV to decrease the valve step at a first step rate;
If T-DeltaT 2'＜T1-T2＜T+ΔT2' and T 1-T2 > T, controlling the EEV to increase the valve step at a second step rate;
if T-DeltaT 2'＜T1-T2＜T+ΔT2' and T 1-T2 < T, controlling the EEV to decrease the valve step at a second step rate;
Wherein, T is the target superheat degree, T 1 is the current compressor suction temperature, T 2 is the current evaporation temperature, deltaT 0 'is the dead zone, deltaT 1' is the fine tuning zone, deltaT 2 'is the coarse tuning zone, and DeltaT 0'、ΔT1'、ΔT2', the first stepping rate and the second stepping rate are sequentially increased.
Preferably, the controlling the internal fan to operate based on the internal fan operation curve includes:
Judging the size of the current return air temperature in the cabinet;
if the current internal return air temperature of the cabinet is smaller than the upper limit point temperature of the internal fan and is larger than or equal to the lower limit point temperature of the internal fan, controlling the rotation speed of the internal fan to linearly adjust between the lower limit speed of the internal fan and the upper limit speed of the internal fan, wherein the linear adjustment is that the rotation speed of the internal fan is increased along with the increase of the internal return air temperature of the cabinet;
if the current return air temperature in the cabinet is smaller than the full-speed point temperature of the inner fan and is larger than or equal to the upper limit point temperature of the inner fan, controlling the inner fan to operate according to the upper limit speed of the inner fan;
if the current return air temperature in the cabinet is greater than or equal to the full-speed point temperature of the inner fan, controlling the inner fan to operate at the full-speed rotating speed;
and if the current return air temperature in the cabinet is less than the lower limit point temperature of the inner fan, controlling the inner fan to stop running.
Preferably, the controlling the compressor to operate based on the compressor operation curve includes:
Judging the size of the current return air temperature in the cabinet;
If the current return air temperature in the cabinet is greater than or equal to the temperature of the starting point of the compressor, controlling the compressor to start and operating at the compressor holding frequency for 2.5 to 3.5 minutes;
If the current return air temperature in the cabinet is smaller than the lower limit point temperature of the compressor and is larger than the stop point temperature of the compressor, controlling the operation frequency of the compressor to keep the lower limit frequency operation;
if the current in-cabinet return air temperature is smaller than or equal to the upper limit point temperature of the compressor and is larger than or equal to the lower limit point temperature of the compressor, controlling the operation frequency of the compressor to be adjusted linearly between the lower limit frequency and the upper limit frequency, wherein the linear adjustment is that the operation frequency of the compressor is increased along with the increase of the in-cabinet return air temperature;
If the current return air temperature in the cabinet is higher than the upper limit point temperature of the compressor, controlling the running frequency of the compressor to be the upper limit frequency;
And if the current return air temperature in the cabinet is less than or equal to the stop point temperature of the compressor, controlling the compressor to stop running.
Preferably, before the control compressor operates based on the compressor operation curve, further comprising:
Judging the size of the current system operation parameter point;
If the current system operation parameter point is smaller than the primary parameter operation set point, controlling the compressor to operate based on the compressor operation curve;
If the current system operation parameter point is greater than or equal to the primary reference operation set point and less than the secondary parameter operation set point, controlling the compressor to increase the frequency rate;
if the current system operation parameter point is greater than or equal to the secondary parameter operation set point and less than the tertiary parameter operation set point, controlling the operation frequency of the compressor to maintain the current frequency to continue operation;
If the current system operating parameter point is greater than or equal to the three-level parameter operating set point, controlling the compressor to operate at an increased down-conversion rate until the compressor protection frequency is reduced;
Wherein the current system operating parameter points include: one or more of condensing temperature, module current, exhaust temperature, module temperature; the compressor protection frequency is the lower limit frequency of the compressor.
In order to achieve the second object described above, the present invention also provides an air conditioner operation device including a storage medium configured to be able to store a computer program which, when executed by a processor, is able to implement the steps of any one of the air conditioner operation control methods described above. Since the above-mentioned air conditioner operation control method has the above-mentioned technical effects, the air conditioner operation device should also have corresponding technical effects.
In order to achieve the third object described above, the present invention also provides an air conditioner including a storage medium configured to be able to store a computer program that, when executed by a processor, is able to implement the steps of any one of the air conditioner operation control methods described above. Since the above-mentioned air conditioner operation control method has the above-mentioned technical effects, the air conditioner should also have corresponding technical effects.
In order to achieve the fourth object, the present invention also provides a computer-readable storage medium storing a computer program capable of implementing any one of the above-described air conditioner operation control methods when executed by a processor. Since the above-described air conditioner operation control method has the above-described technical effects, the computer-readable storage medium should have the corresponding technical effects as well.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of an air conditioner operation control method according to an embodiment of the present invention;
fig. 2 is a flow chart of another air conditioner operation control method according to an embodiment of the present invention;
Fig. 3 is a schematic step flow diagram of an air conditioner operation control method according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an offset curve of an external fan according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an external fan operation reference curve according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an inner fan operation curve according to an embodiment of the present invention;
FIG. 7 is a schematic view of a compressor operating curve provided by an embodiment of the present invention;
fig. 8 is a schematic flow chart of an air conditioner operation control method according to an embodiment of the present invention;
Fig. 9 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention discloses an air conditioner operation control method, which is used for effectively solving the problem that the output of the air conditioner capacity is difficult to reduce at present.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 9, fig. 1 is a schematic flow chart of an air conditioner operation control method according to an embodiment of the present invention; fig. 2 is a flow chart of another air conditioner operation control method according to an embodiment of the present invention; fig. 3 is a schematic step flow diagram of an air conditioner operation control method according to an embodiment of the present invention; FIG. 4 is a schematic diagram of an offset curve of an external fan according to an embodiment of the present invention; FIG. 5 is a schematic structural diagram of an external fan operation reference curve according to an embodiment of the present invention; FIG. 6 is a schematic diagram of an inner fan operation curve according to an embodiment of the present invention; FIG. 7 is a schematic view of a compressor operating curve provided by an embodiment of the present invention; fig. 8 is a schematic flow chart of an air conditioner operation control method according to an embodiment of the present invention; fig. 9 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention. .
As shown in fig. 1, some embodiments of the present invention provide an air conditioner operation control method, which includes the following steps:
s100: and judging whether the current operating frequency of the compressor is smaller than the low-load reference frequency of the compressor.
That is, based on the current compressor operating frequency f Transport and transport , a magnitude comparison is made with a pre-stored or pre-acquired compressor low-load reference frequency f Reference to . That is, it is determined whether or not f Transport and transport ＜f Reference to is established. The low-load reference frequency f Reference to of the compressor is the demarcation point of the low-load mode and the standard mode of the air conditioner operation, and is the maximum operation frequency allowed when the air conditioner enters low-load (low-load) operation; the value of the low-load reference frequency of the compressor can be obtained through theoretical design calculation or laboratory tests; the aim is to control the capacity output of the air conditioner in a sectional way. The running frequency of the compressor is higher than the low-load reference frequency of the compressor, and the air conditioner outputs the air with normal refrigerating capacity; the running frequency of the compressor is lower than the low-load reference frequency of the compressor, and the output rotating speed of the external fan is limited independently at the moment, so that the heat exchange capacity outside an air conditioner chamber is reduced, the integral refrigerating output capacity of the air conditioner is further reduced, and the aim of achieving the target low-load capacity is fulfilled; the low load (low load) of the air conditioner is the lowest refrigerating capacity which can be output by the running of the air conditioning unit under the condition of the index-scale working condition, and the range can be defined artificially according to the actual requirement of a client; for example, taking an air conditioner of 7.5KW as an example, if the heat load in the cabinet is 4KW, the cooling load of the air conditioner is 4KW, and for an air conditioner of 7.5KW, the low-load mode can be considered, and if the cooling load of the air conditioner is 5KW, the standard mode can be considered, in the present application, the cooling capacity of the air conditioner of not less than 60% is considered as the standard mode, and less than 60% is considered as the low-load mode.
S200: and if the current operating frequency of the compressor is smaller than the low-load reference frequency of the compressor, controlling the operation of the external fan based on an external fan offset curve, wherein the external fan offset curve is an offset curve obtained after the external fan operation reference curve is offset by using a preset offset.
As shown in fig. 4, the outer fan offset curve is an offset curve obtained after the outer fan operation reference curve is offset by using a preset offset, so that the outer fan stopping point temperature, the outer fan starting point temperature, the outer fan upper limit point temperature, the outer fan noise limit point temperature and the outer fan full speed point temperature in the outer fan operation reference curve mentioned later are all increased by a preset offset θ. Or can be understood as: the outer fan offset curve is an offset curve obtained after the outer fan operation reference curve is offset to the right by θ.
The operation reference curve of the external fan is an operation curve of the external fan when the operation frequency of the compressor is in a normal working state or in a standard working state.
The preset offset θ may take any value at a positive number greater than zero, and may gradually decrease with the compressor operating frequency f Transport and transport , and preferably, the upper limit speed in the outer fan offset curve is less than the lower limit speed of the outer fan operating reference curve, which is generally not infinitely small, so as to ensure stable operation of the compressor.
The range of theta can be 0 < theta < the temperature of the upper limit point of the outer fan-the temperature of the opening point of the outer fan; because, if when θ=the upper limit point temperature of the outer fan-the opening point temperature of the outer fan, that is, when the upper limit point of the outer fan=the lower limit point after the outer fan is deflected, and at this time, when the fan operates according to the deflected curve, if the condensation temperature is lower than the lower limit point after the outer fan is deflected (that is, the upper limit point of the outer fan of the original outer fan curve), the outer fan keeps running at the lower limit speed, and cannot regulate the speed, the range of θ is not recommended to be equal to the upper limit point temperature of the outer fan-the opening point temperature of the outer fan.
In the air conditioner operation control method, the aim of further reducing the capacity output of the air conditioner is achieved by limiting the heat radiation capacity output of the condenser of the air conditioner on the basis of low-load control (reducing the frequency of the compressor). The size and the refrigerant quantity of the two devices cannot be changed after the air conditioner is produced, and electronic components such as the heat dissipation fan, the throttling element and the like are controlled in a sectional manner in control logic, so that the output of the external fan is limited when the air conditioner runs at low speed, the heat dissipation capacity of the air conditioner is indirectly limited, and the aim of further reducing the output of the air conditioner is achieved. In summary, the air conditioner operation control method can effectively solve the problem that the output of the air conditioner is difficult to reduce at present.
As shown in fig. 2,3, 4, in some embodiments, it is preferable to: and judging whether the current operating frequency of the compressor is smaller than the low-load reference frequency of the compressor. Thereafter, the method further comprises the following steps:
Step 300: and if the current compressor running frequency is not less than the compressor low-load reference frequency, controlling the running of the external fan based on the external fan running reference curve.
That is, when f Transport and transport ＜f Reference to is not established, the operation of the external fan is controlled based on the external fan operation reference curve.
As shown in fig. 2, 3, and 4, in some embodiments, the current operation state may be further considered, and in general, when the external fan is operated based on the external fan operation reference curve, the air conditioner is in the standard mode; and when the external fan operates based on the external fan offset curve, the air conditioner is in a low-load mode. In the standard mode, the preset return difference frequency f Return difference needs to be further considered. The return difference frequency is the difference between the frequency corresponding to the air conditioning unit exiting the low-load running mode and the frequency corresponding to the air conditioning unit entering the low-load running mode, and aims to avoid frequent switching of the air conditioning unit between the low-load mode and the standard mode when the running frequency of the compressor changes, and the determination of the return difference frequency is based on the fact that the system is not easy to frequently switch, and is generally defaulted to be between 10 and 15Hz, and is recommended to be within 20% of the running range of the frequency of the compressor.
Based on this, the above step S200 is preferable: and if the current operating frequency of the compressor is smaller than the low-load reference frequency of the compressor, controlling the operation of the external fan based on the external fan offset curve. Thereafter, the method further comprises the following steps:
Step 400: and judging whether the current running frequency of the compressor is smaller than the sum of the low-load reference frequency of the compressor and the preset return difference frequency.
That is, in the judgment of the current compressor operation frequency, not only the low-load reference frequency of the compressor but also the preset return difference frequency needs to be further considered for comprehensive judgment, namely, whether the f Transport and transport ＜f Reference to +f Return difference is established or not is judged. After step 200, it means that the air conditioner enters the low-load mode, and in the low-load mode, the preset return difference frequency needs to be further considered, that is, whether the determination f Transport and transport ＜f Reference to +f Return difference is satisfied or not is determined.
Wherein the return difference frequency is preset: the frequency difference value corresponding to the air conditioner exiting the low-running mode and the frequency difference value corresponding to the air conditioner entering the low-running mode is used for avoiding frequent switching between the low-running mode and the standard mode when the running frequency of the press is changed, and the return difference frequency is determined based on the fact that the system is not easy to frequently switch, and is generally defaulted to be between 10 Hz and 15 Hz.
Step 500: and if the current compressor running frequency is smaller than the sum of the low-load reference frequency of the compressor and the preset return difference frequency, controlling the running of the external fan based on the external fan offset curve, and re-jumping to the step of judging whether the current compressor running frequency is smaller than the sum of the low-load reference frequency of the compressor and the preset return difference frequency.
In the low-load mode, i.e. after executing step 200, step 400 is performed, if f Transport and transport ＜f Reference to +f Return difference is satisfied, it is determined that the current state is still in the low-load mode, and then the operation of the external fan is still controlled based on the external fan offset curve, i.e. the state after executing step 200 is maintained. And then jumps back to step 400 to make the determination again. The judgment of step 400 may be returned in time, or the step 400 may be returned at intervals of a predetermined time.
Step 600: and if the current compressor running frequency is not less than the sum of the compressor low-load reference frequency and the preset return difference frequency, controlling the operation of the external fan based on the external fan running reference curve, and re-jumping to judge whether the current compressor running frequency is less than the compressor low-load reference frequency.
In the low-load mode, i.e. after executing step 200, step 400 is performed, if f Transport and transport ＜f Reference to +f Return difference is not satisfied, it is determined that the current state is in the standard mode from the low-load mode, then step 300 is required to be executed, and the same step as step 300 is executed, and the process returns to step 200 to continue the determination.
That is, continuously judging whether the current compressor operation frequency is smaller than the sum of the low-load reference frequency of the compressor and the preset return difference frequency, executing the same step as the step 300 until the judgment result is that the current compressor operation frequency is not smaller than the sum of the low-load reference frequency of the compressor and the preset return difference frequency, namely, controlling the operation of the outer fan based on the outer fan operation reference curve, and then jumping to the step 200.
As shown in fig. 2,3,4, in some embodiments, step 300 is preferred: and if the current compressor running frequency is not less than the compressor low-load reference frequency, controlling the running of the external fan based on the external fan running reference curve, and further comprising the following steps:
And if the current compressor running frequency is not smaller than the compressor low-load reference frequency, controlling the external fan to run based on the external fan running reference curve, and restarting to judge whether the current compressor running frequency is smaller than the compressor low-load reference frequency.
I.e. "control of the operation of the external fan based on said external fan operation reference curve" in step 300 is performed, which then means that the external fan is currently in the standard mode and that a jump to step 100 is required.
As shown in fig. 2, 3, and 4, in some embodiments, it is also necessary to consider whether the initial state is performed first, step 100 described above, or step 200 described above. Based on this, step 100 is preferred here: judging whether the current operating frequency of the compressor is smaller than the low-load reference frequency of the compressor or not, and further comprising the following steps:
Step 700: and judging whether the power is firstly electrified, if so, judging whether the running frequency of the compressor is smaller than the low-load reference frequency of the compressor.
In some embodiments, after power-up, the determination of step 100 is performed, then step 200 or step 300 is performed according to the result, and after step 200 is performed, the determination of step 400 is performed, then step 500 or step 600 is performed according to the determination result, after step 600, the jump to step 200 is required, and after step 500 is performed, the return to step 400 is required. And after step 300 is performed, a return to step 100 is also required.
As shown in fig. 2, 3, 4, i.e., in some embodiments, when the air conditioning unit is first powered on: if the current compressor frequency is not less than the low-load reference frequency of the compressor, the air conditioning unit enters a standard mode, and in the standard mode, the external fan operates according to the external fan operation reference curve; and if the current compressor frequency is smaller than the low-load reference frequency of the compressor, the air conditioning unit enters a low-load mode at the moment, and the external fan operates according to the external fan offset curve in the low-load mode.
After the air conditioning unit enters the low-load mode: if the current compressor running frequency is smaller than the sum of the low-load reference frequency and the return difference frequency of the compressor, the air conditioning unit is still in the low-load mode; and if the current compressor frequency continues to rise to be not less than the sum of the low-load reference frequency and the return difference frequency of the compressor, the air conditioning unit exits the low-load mode at the moment and enters the standard mode.
After the air conditioning unit enters the standard mode, if the current compressor frequency is not less than the compressor low-load reference frequency, the air conditioning unit is still in the standard mode, and if the current compressor frequency is continuously reduced to the compressor running frequency which is less than the compressor low-load reference frequency, the air conditioning unit enters the low-load mode.
In some embodiments, as shown in fig. 5, wherein controlling the operation of the external fan based on the external fan operation reference curve comprises:
judging the current condensation temperature; i.e. determining which interval temperature the current condensing temperature belongs to, so as to execute the corresponding steps. The condensation temperature, particularly the current condensation temperature, can be obtained by referring to the prior art, for example, the condensation pressure and the condensation temperature have a one-to-one correspondence, the condensation temperature can be reflected by measuring the pressure, and the condensation temperature can also be measured by a temperature sensor. Of course, the condensation temperature may be obtained by a temperature sensor.
If the current condensing temperature is smaller than the upper limit point temperature of the outer fan and the current condensing temperature is larger than or equal to the opening point temperature of the outer fan, the rotating speed of the outer fan is controlled to be linearly regulated between the lower limit speed N 1 of the outer fan and the upper limit speed N 2 of the outer fan, and the rotating speed of the outer fan is increased along with the increase of the condensing temperature. Specifically, the rotation speed N of the external fan may be: outer fan lower limit speed N 1 + ((condensation temperature T Condensation -outer fan opening point temperature T opening point )/(outer fan upper limit point T Upper limit point -outer fan opening point T opening point )) + (outer fan upper limit speed N 2 -outer fan lower limit speed N 1), i.e.:
N＝N1+((T Condensation -T opening point )/(T Upper limit point -T opening point ))*(N2-N1)。
And if the current condensing temperature is smaller than the noise limiting point temperature of the outer fan and is larger than or equal to the upper limiting point temperature of the outer fan, controlling the rotating speed of the outer fan to be equal to the upper limiting point temperature of the outer fan, and operating at a constant speed.
And if the current condensing temperature is smaller than the full-speed point temperature of the outer fan and is larger than or equal to the noise limiting point temperature of the outer fan, controlling the rotating speed N of the outer fan to linearly adjust between the upper limit speed N 2 of the outer fan and the full-speed N 3 of the outer fan, wherein the linear adjustment is that the rotating speed of the outer fan is increased along with the increase of the condensing temperature. That is, the external fan rotation speed n=the external fan upper limit speed N 2 + ((condensation temperature T Condensation -external fan noise limit point T noise limiting point )/(external fan upper limit point T Upper limit point -external fan opening point T opening point )) (external fan full speed N 3 -external fan upper limit speed N 2), that is:
N＝N2+((T Condensation -T noise limiting point )/(T Upper limit point -T opening point ))*(N3-N2)。
and if the current condensation temperature is higher than the full-speed point temperature of the outer fan, controlling the rotating speed of the outer fan to be equal to the full speed of the outer fan, and operating at a constant speed.
And if the current condensing temperature is smaller than the temperature of the starting point of the external fan and is larger than or equal to the temperature of the stopping point of the external fan, controlling the rotating speed of the external fan to be equal to the lower limit speed of the external fan, and operating at a constant speed.
And if the current condensing temperature is less than the stopping point temperature of the outer fan, controlling the outer fan to stop running.
The temperature of the stopping point of the external fan, the temperature of the starting point of the external fan, the temperature of the upper limit point of the external fan, the temperature of the noise limit point of the external fan and the temperature of the full speed point of the external fan are sequentially increased, and the temperature of the full speed point of the external fan is correspondingly set according to the operation requirement of the external fan. In practice, the temperatures corresponding to the points on the outer fan operation reference curve 1 are smaller than the temperatures corresponding to the points on the outer fan offset curve 2 by θ. It should be noted that, the stopping point temperature of the external fan is the lower limit temperature corresponding to the normal operation of the external fan; the lower limit point of the outer fan is the starting point of the outer fan; the upper limit point temperature of the outer fan is the condensation temperature corresponding to the full load operation under the rated working condition of the air conditioner, and can be obtained through theoretical calculation or cold test; the temperature of the noise limiting point of the external fan is the maximum condensation temperature which can be reached by the stable operation of the air conditioner under the condition that the environmental noise requirement of a user side is met, namely the current rotation speed of the external fan is unchanged. The external fan stopping point temperature, the external fan starting point temperature, the external fan upper limit point temperature, the external fan noise limit point temperature and the external fan full speed point temperature can be set manually according to actual external fan operation parameters, specific numerical values can be not limited, and the core of the application is to divide the value range of the condensation temperature so that the external fan can operate at different rotation speeds. Correspondingly, specific numerical values of the lower speed limit of the outer fan, the upper speed limit of the outer fan and the full speed of the outer fan can be correspondingly set according to the performance of the fan, and the value range is generally divided according to the characteristics of the fan.
Specifically, the method can also be obtained according to the following formula:
Outer fan stopping point temperature = outer fan target setpoint temperature + return difference temperature x outer fan stopping demand;
External fan start point temperature = external fan target setpoint temperature + return difference temperature x external fan start demand;
The outer fan upper limit point temperature = outer fan target setpoint temperature + return difference temperature x outer fan upper limit demand;
outer blower limit noise point temperature = outer blower target setpoint temperature + return difference temperature x outer blower limit noise demand;
external fan full speed point temperature = external fan target set point temperature + return difference temperature%external fan maximum speed demand.
Wherein the target set point temperature of the external fan is set manually according to the running environment of the air conditioner, the self performance of the external fan and the performance of the air conditioner.
In some embodiments, the controlling the operation of the external fan based on the external fan operation reference curve comprises: judging the rotating speed of the external fan which is increased along with the current condensing temperature; if the rotation speed of the outer fan is increased along with the increase of the condensing temperature to the noise limit value of the outer fan, the outer fan runs at a stable speed, and after the condensing temperature continues to be increased by a preset temperature value range, the rotation speed of the outer fan is controlled to be increased along with the increase of the condensing temperature, so that when the rotation speed of the outer fan reaches the maximum value of the noise, the outer fan can keep rotating at the speed to avoid increasing the noise along with the increase of the condensing temperature. And after the condensation temperature further increases a section of value range, the outer fan is kept to rotate at a constant speed at the moment, the cooling requirement cannot be met, and the cooling requirement is taken as a priority at the moment, so that the rotation speed of the outer fan can be continuously increased.
In some embodiments, the air conditioning unit, taking an example of being disposed in a cabinet, mainly comprises an inner fan, an outer fan, a condenser, a compressor and an evaporator, an EEV (electronic expansion valve, an electronic expansion valve), and an in-cabinet return air temperature sensor, a condensation temperature sensor and an evaporation temperature sensor, wherein the compressor, the condenser and the evaporator are sequentially connected into a closed loop through pipelines, and the electronic expansion valve is disposed between the condenser and the evaporator. Wherein the inner blower is disposed at the evaporator to accelerate the flow of gas at the evaporator, and wherein the outer blower is disposed at the condenser to accelerate the flow of gas at the condenser.
In actual operation, namely in a normal mode, the external fan operates according to an external fan operation reference curve, wherein the external fan operation reference curve is generally a relation between a condensation temperature and an external fan rotating speed, and the condensation temperature refers to a saturation temperature of a refrigerant when the condenser is liquefied under a given pressure; namely, when the condensing temperature is at different temperatures, the external fan rotates at corresponding rotating speeds, and generally in some temperature ranges, the external fan keeps rotating at a constant speed, and in other temperature ranges, the external fan can show the phenomenon that the rotating speed is increased along with the temperature. Specifically, the operation reference curve of the external fan can be correspondingly set according to the needs, and the reference factors can have the following points: refrigeration requirement, ambient temperature, and operation of the whole machine.
In some embodiments, the method may include the following steps before determining whether the current compressor operating frequency is less than the compressor low load reference frequency in step 100:
Judging whether the return air temperature in the cabinet is greater than the refrigeration set point temperature or not and adding the product of the return difference temperature and the refrigeration opening requirement;
If the current in-cabinet return air temperature is greater than the refrigeration set point temperature and the product of the return difference temperature and the refrigeration starting requirement is added, controlling the air conditioner to start up and operate, controlling the inner fan to operate based on an inner fan operation curve, controlling the outer fan to operate based on an outer fan curve, and controlling the compressor to operate based on a compressor operation curve.
Namely, when the current return air temperature T 1 in the cabinet is detected to be greater than the refrigeration set point temperature T Refrigerating system and the product of the return difference temperature T Return difference and the refrigeration opening demand a is added, namely when T 1＞T Refrigerating system +T Return difference is multiplied by a, the inner fan operates according to an inner fan operating curve, the outer fan operates according to an outer fan curve, and the compressor operates according to a compressor curve; the external fan specifically runs according to an external fan running reference curve or an external fan deviation curve, and the judgment is further needed, wherein the return air temperature T 1 in the cabinet refers to the temperature rise of load heating in the client cabinet detected through an air conditioner internal temperature sensing element; the refrigerating set point is a reference point for detecting the indoor return air temperature and judging whether the air conditioner starts refrigerating operation or not.
When the air conditioner is powered on and operated for the first time, and when the operating frequency f Transport and transport of the compressor is smaller than the low-load reference frequency f Reference to of the compressor and is larger than or equal to the lower limit frequency f lower limit of of the compressor, namely f Transport and transport ∈[f lower limit of ,f Reference to ), the air conditioner is operated in a low-load mode; when the compressor operating frequency f Transport and transport is less than the compressor lower limit frequency f Upper limit of and greater than or equal to the compressor low-load reference frequency f Reference to , f Transport and transport is e [ f Reference to ,f Upper limit of ], the air conditioner operates in standard mode.
When the air conditioner enters the low-load mode, the air conditioner is still in the low-load mode at the compressor running frequency f Transport and transport ∈[f Reference to ,f Reference to +f Return difference ), if the current compressor frequency continues to rise, when the compressor running frequency f Transport and transport ∈[f Reference to +f Return difference ,f Upper limit of ), the air conditioner exits the low-load mode and enters the standard mode;
after the air conditioner enters the standard mode, the standard mode compressor frequency range [ f Reference to ,f Upper limit of ] at this time, if the current compressor frequency continues to drop to the compressor operating frequency f Transport and transport ∈[f lower limit of ,f Reference to ), the air conditioner enters the low-load mode at this time.
In the standard mode, the external fan can be operated according to an external fan operation reference curve, and the EEV (electronic expansion valve) is subjected to PID (proportion integration differentiation) adjustment according to the target superheat degree; in the low-load mode, the outer fan can be operated according to the outer fan offset curve, for example, the outer fan can be operated according to the outer fan curve which is offset rightwards by one theta ℃, the EEV is subjected to PID (proportion integration differentiation) adjustment according to the low-load superheat degree, and the superheat degree is operated with low-load superheat degree.
Wherein the low load is: and under the nominal working condition, the air conditioner can operate to output the lowest refrigerating capacity.
In some embodiments, when the external fan is required to operate based on the rotational speed of the external fan operation reference curve, the EEV is subjected to PID adjustment according to the target superheat degree; when the outer fan operates based on the rotating speed requirement of the outer fan deflection curve, the EEV is subjected to PID regulation according to the low-load superheat degree (a basic regulation mode of a control system is a linear regulation rule with proportional, integral and differential functions).
In some embodiments, after said determining whether the return air temperature in the cabinet is greater than the refrigeration set point temperature and adding the product of the return difference temperature and the refrigeration on demand, the method further comprises the steps of:
If the current in-cabinet return air temperature is greater than the refrigeration set point temperature and the product of the return difference temperature and the refrigeration on demand is added, controlling the EEV to maintain the preset valve step for 2.5 to 3.5 minutes, for example, the operation can be performed for 3 minutes; maintaining the operation of the valve step, and performing PID (proportion integration differentiation) adjustment on the air conditioner based on the target superheat degree, wherein the PID adjustment on the air conditioner based on the target superheat degree specifically comprises the following steps:
judging the size of T 1-T2;
If T-DeltaT 0'＜T1-T2＜T+ΔT0', controlling the EEV to keep the current valve step inactive;
If T-DeltaT 1'＜T1-T2＜T+ΔT1' and T 1-T2 > T, controlling the EEV to increase the valve step at a first step rate;
if T-DeltaT 1'＜T1-T2＜T+ΔT1' and T 1-T2 < T, controlling the EEV to decrease the valve step at a first step rate;
if T-DeltaT 2'＜T1-T2＜T+ΔT2' and T 1-T2 > T, controlling the EEV to increase the valve step at a second step rate;
If T-DeltaT 2'＜T1-T2＜T+ΔT2' and T 1-T2 < T, controlling the EEV to decrease the valve step at a second step rate;
Wherein T is the target superheat degree, T 1 compressor suction temperature, T 2 is the evaporation temperature, deltaT 0 'is the dead zone, deltaT 1' is the fine tuning zone, deltaT 2 'is the coarse tuning zone, i.e. wherein DeltaT 0'<ΔT1'<ΔT2'. And wherein the first stepping rate < the second stepping rate. The suction temperature refers to the temperature of the gaseous refrigerant at the inlet of the compressor; the evaporating temperature refers to the saturation temperature of the refrigerant at a given pressure as it evaporates in the evaporator. Wherein maintaining the electronic expansion valve inactive at the current valve step comprises: and constructing a mapping relation between the suction temperature and the evaporation temperature and the opening interval of the electronic expansion valve in advance according to the difference value of the suction temperature and the evaporation temperature, and controlling the opening of the electronic expansion valve to be adjusted to the valve step operation in the current opening interval corresponding to the current difference value.
As shown in fig. 6, in some embodiments, controlling the operation of the internal blower based on the internal blower operation curve includes:
judging the size of the current return air temperature in the cabinet; i.e. to determine which space the size is in particular, and then to perform the corresponding operation.
If the current internal return air temperature of the cabinet is smaller than the upper limit point temperature of the internal fan and is larger than or equal to the lower limit point temperature of the internal fan, the rotating speed of the internal fan is controlled to be linearly regulated between the lower limit speed of the internal fan and the upper limit speed of the internal fan, and the rotating speed of the internal fan is increased as the internal return air temperature of the cabinet is increased. If possible, the inner fan rotation speed N ' =the inner fan lower limit speed N ' 1 + ((cabinet inner return air temperature T 1 -inner fan lower limit point temperature T ' Lower limit point )/(inner fan upper limit point T ' Upper limit point -inner fan lower limit point T ' Lower limit point )) + (inner fan upper limit speed N ' 2 -inner fan lower limit speed N ' 1)), that is:
N’＝N’1+((T1-T' Lower limit point )/(T' Upper limit point -T' Lower limit point ))*(N'2-N'1)
And if the current return air temperature in the cabinet is smaller than the full-speed point temperature of the inner fan and is larger than or equal to the upper limit point temperature of the inner fan, controlling the inner fan to operate according to the upper limit speed of the inner fan.
And if the current return air temperature in the cabinet is greater than or equal to the full-speed point temperature of the inner fan, controlling the inner fan to operate at the full-speed rotating speed.
And if the current return air temperature in the cabinet is less than the lower limit point temperature of the inner fan, controlling the inner fan to stop running.
The application is characterized in that the value range of the return air temperature in the cabinet is divided, so that the internal fan can operate at different rotating speeds. The lower speed limit of the inner fan, the upper speed limit of the inner fan and the inner fan are correspondingly set according to the requirements, and can be correspondingly set according to specific performance parameters of the inner fan.
Specifically, the method can also be obtained according to the following formula:
Inner fan stopping point temperature = inner fan refrigeration point temperature + return difference temperature x inner fan stopping demand;
inner fan lower limit point temperature = inner fan refrigeration point temperature + return difference temperature x inner fan lower limit demand;
inner fan upper limit temperature=inner fan refrigeration point temperature+return difference temperature;
Inner fan full speed point temperature = inner fan refrigeration point temperature + return difference temperature × inner fan maximum speed demand%.
As shown in fig. 7, in some embodiments, controlling the compressor to operate based on the compressor operating curve includes:
judging the size of the current return air temperature in the cabinet; i.e. to determine which space the size is in particular, and then to perform the corresponding operation.
If the current return air temperature in the cabinet is greater than or equal to the temperature of the starting point of the compressor, the compressor is controlled to be started and operated for 2.5 minutes to 3.5 minutes at the compressor holding frequency, for example, the operation can be performed for 3 minutes;
If the current return air temperature in the cabinet is smaller than the lower limit point temperature of the compressor and is larger than the stop point temperature of the compressor, controlling the operation frequency of the compressor to keep the lower limit frequency operation;
if the current in-cabinet return air temperature is smaller than or equal to the upper limit point temperature of the compressor and is larger than or equal to the lower limit point temperature of the compressor, controlling the operation frequency of the compressor to be adjusted linearly between the lower limit frequency and the upper limit frequency, wherein the linear adjustment is that the operation frequency of the compressor is increased along with the increase of the in-cabinet return air temperature; for example, the compressor operating frequency f=lower limit frequency f 1 + ((cabinet return air temperature T 1 -compressor lower limit point temperature T " Lower limit point )/(compressor upper limit point temperature T" Upper limit point -compressor lower limit point temperature T " Lower limit point )) (compressor upper limit frequency f 2 -compressor lower limit frequency f 1), namely:
f＝f1+((T1-T" Lower limit point )/(T" Upper limit point -T" Lower limit point ))*(f2-f1)。
If the current return air temperature in the cabinet is higher than the upper limit point temperature of the compressor, controlling the running frequency of the compressor to be the upper limit frequency;
And if the current return air temperature in the cabinet is less than or equal to the stop point temperature of the compressor, controlling the compressor to stop running.
The application is characterized in that the value ranges of the return air temperature in the cabinet are divided so as to enable the inner fan to operate at different rotating speeds. The specific sizes of the holding frequency, the lower limit frequency and the upper limit frequency of the compressor can be correspondingly considered and set according to the performance of the compressor.
Specifically, the method can also be obtained according to the following formula:
Compressor stop point temperature = compressor refrigeration point temperature + return difference temperature compressor stop demand;
Compressor lower limit temperature = compressor refrigeration point temperature + return difference temperature compressor lower limit demand;
compressor start point temperature = compressor refrigeration point temperature + return difference temperature compressor start demand;
compressor upper limit point temperature = compressor refrigeration point temperature + return difference temperature%compressor upper limit demand.
In some embodiments, before the "the compressor operates according to the compressor operation curve", the method further includes controlling the compressor to operate according to the system operation parameter point, and specifically includes:
Judging the size of the current system operation parameter point;
If the current system operation parameter point is smaller than the primary parameter operation set point, controlling the compressor to normally regulate the speed of the compressor operation curve;
If the current system operating parameter point is greater than or equal to the primary parameter operating setpoint and less than the secondary parameter operating setpoint, the compressor boost rate is controlled to decrease, such as from an original boost rate of 2Hz/s per second (Hz/s) to 2Hz/min (Hz/min).
And if the current system operation parameter point is greater than or equal to the secondary parameter operation set point and less than the tertiary parameter operation set point, controlling the compressor operation frequency to maintain the current frequency to continue operation.
If the current system operation parameter point is greater than or equal to the three-level parameter operation set point, the compressor is controlled to operate at an increased frequency-reducing rate until the frequency is reduced to the compressor protection frequency, and even if the current frequency-reducing rate is increased, the specific increase range can be set according to the needs, such as one-time increase and multiple continuous increases.
Wherein the system operating parameter points include: one or more of condensing temperature, module current, exhaust temperature, module temperature; the compressor protection frequency is the lower limit frequency of the compressor, and is generally the lower limit value of the compressor with three-stage frequency-reducing logic. The primary parameter operation set point, the secondary parameter operation set point and the tertiary parameter operation set point can be set manually according to the requirements.
The return difference temperature refers to the adjustment accuracy (section) of the target temperature, and is set so that the target temperature is maintained within a certain section.
The required percent in each formula is the deviation degree of the actual detection temperature of the current air conditioner and the target set temperature, and the calculation formula is as follows:
The dead zone interval delta T 0' is the allowable variation deviation (error) range of the actual superheat degree relative to the target superheat degree, namely the EEV can maintain the current valve step unchanged in the interval range; the EEV fine adjustment interval and the coarse adjustment interval are used for adjusting EEVs in a segmented mode according to the difference of deviation degrees of the current actual superheat degree and the target superheat degree, wherein the fine adjustment is performed by the EEVs at a stepping rate v 1, and the coarse adjustment is performed by the EEVs at a feeding rate v 2, wherein v 2＞v1; the purpose is as follows: the EEV is beneficial to fast and stable operation.
Based on the air conditioner operation control method provided in the above embodiment, the embodiment of the present application further provides an air conditioner control device, which includes a storage medium and a processor, where the storage medium is configured to be capable of storing a computer program, and the computer program when executed by the processor is capable of implementing the steps of the air conditioner operation control method of any one of the above embodiments. Since the air conditioner control device adopts the air conditioner operation control method, the air conditioner control device has the beneficial effects described in the above embodiments.
Based on the air conditioner operation control method provided in the above embodiment, an embodiment of the present application further provides an air conditioner, as shown in fig. 9, where the air conditioner includes a storage medium, a processor, and further includes an inner fan, an outer fan, a compressor, and an EEV, and the storage medium is configured to be capable of storing a computer program, where the computer program when executed by the processor is capable of implementing the steps of the air conditioner operation control method according to any one of claims 1 to 13, so as to control the operation of the inner fan, the outer fan, the compressor, and the EEV. The air conditioner adopts the air conditioner operation control method, so the beneficial effects of the air conditioner are shown in the embodiment.
Based on the air conditioner operation control method provided in the above embodiment, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, the computer program being capable of implementing the air conditioner operation control method according to any one of claims 1 to 13 when executed by a processor. Since the computer-readable storage medium adopts the above-described air conditioner operation control method, the advantageous effects of the computer-readable storage medium are as described in the above-described embodiments.
A processor (or CPU (Central Processing Unit, central processing unit)) is a computing core and a control core of an electronic device, which is adapted to implement one or more instructions, in particular to load and execute one or more instructions to implement a corresponding method flow or a corresponding function; in one embodiment, the processor described above in the embodiments of the present application may be used to perform a series of processes, including the steps involved in the methods shown in fig. 1 and 2.
The embodiment of the application also provides a computer storage medium (Memory), which is a Memory device in the electronic device and is used for storing programs and data. It is understood that the computer storage media herein may include both built-in storage media in the electronic device and extended storage media supported by the electronic device. The computer storage medium provides a storage space that stores an operating system of the electronic device. Also stored in the memory space are one or more instructions, which may be one or more computer programs (including program code), adapted to be loaded and executed by the processor. The computer storage medium herein may be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory; optionally, at least one computer storage medium remote from the processor may be present.
In one embodiment, one or more instructions stored in a computer storage medium may be loaded and executed by a processor to implement the corresponding steps in the above embodiments; in specific implementations, one or more instructions in the computer storage medium may be loaded by the processor and perform the steps involved in the method as shown in fig. 1, which are not described herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (14)

1. An air conditioner operation control method, comprising:
judging whether the current operating frequency of the compressor is smaller than the low-load reference frequency of the compressor;
If the current operating frequency of the compressor is smaller than the low-load reference frequency of the compressor, controlling the operation of the external fan based on an external fan offset curve, wherein the external fan offset curve is an offset curve obtained after the external fan operation reference curve is offset by using a preset offset;
The controlling the operation of the external fan based on the external fan operation reference curve comprises the following steps:
Judging the current condensation temperature;
If the current condensing temperature is smaller than the upper limit point temperature of the outer fan and is larger than or equal to the opening point temperature of the outer fan, controlling the rotating speed of the outer fan to linearly adjust between the lower limit speed of the outer fan and the upper limit speed of the outer fan, wherein the linear adjustment is that the rotating speed of the outer fan is increased along with the increase of the condensing temperature;
if the current condensing temperature is smaller than the noise limiting point temperature of the outer fan and is larger than or equal to the upper limiting point temperature of the outer fan, controlling the rotating speed of the outer fan to be equal to the upper limiting point temperature of the outer fan, and operating at a constant speed;
if the current condensing temperature is smaller than the full-speed point temperature of the outer fan and is larger than or equal to the noise limiting point temperature of the outer fan, controlling the rotating speed of the outer fan to linearly adjust between the upper speed limit of the outer fan and the full speed of the outer fan, wherein the linear adjustment is that the rotating speed of the outer fan is increased along with the increase of the condensing temperature;
If the current condensing temperature of the external fan is higher than the full-speed point temperature of the external fan, controlling the rotating speed of the external fan to be the full-speed of the external fan, and operating at a constant speed;
If the current condensing temperature is smaller than the temperature of the starting point of the external fan and is larger than or equal to the temperature of the stopping point of the external fan, controlling the rotating speed of the external fan to be equal to the lower limit speed of the external fan, and operating at a constant speed;
If the current condensing temperature is smaller than the stopping point temperature of the outer fan, controlling the outer fan to stop running;
The temperature of the stopping point of the external fan, the temperature of the starting point of the external fan, the temperature of the upper limit point of the external fan, the temperature of the noise limit point of the external fan and the temperature of the full speed point of the external fan are sequentially increased, and the temperature of the full speed point of the external fan is correspondingly set according to the running requirement of the external fan.
2. The method of controlling operation of an air conditioner according to claim 1, wherein after said determining whether the current compressor operating frequency is less than the compressor low-load reference frequency, further comprising:
And if the current compressor running frequency is not less than the compressor low-load reference frequency, controlling the running of the external fan based on the external fan running reference curve.
3. The air conditioner operation control method according to claim 2, wherein if the current compressor operation frequency is less than the compressor low-load reference frequency, after controlling the operation of the external fan based on the external fan offset curve, further comprising:
Judging whether the current running frequency of the compressor is smaller than the sum of the low-load reference frequency of the compressor and a preset return difference frequency;
If the current compressor running frequency is smaller than the sum of the low-load reference frequency of the compressor and the preset return difference frequency, controlling the running of the external fan based on the external fan offset curve, and re-jumping to the step of judging whether the current compressor running frequency is smaller than the sum of the low-load reference frequency of the compressor and the preset return difference frequency;
And if the current compressor running frequency is not less than the sum of the compressor low-load reference frequency and the preset return difference frequency, controlling the external fan to run based on the external fan running reference curve, and re-jumping to the step of judging whether the current compressor running frequency is less than the compressor low-load reference frequency.
4. The air conditioner operation control method according to claim 3, wherein if the current compressor operation frequency is not less than a compressor low-load reference frequency, controlling the operation of the external fan based on the external fan operation reference curve, further comprising:
And if the current compressor running frequency is not smaller than the compressor low-load reference frequency, controlling the external fan to run based on the external fan running reference curve, and restarting to judge whether the current compressor running frequency is smaller than the compressor low-load reference frequency.
5. The air conditioner operation control method according to any one of claims 1 to 4, wherein before determining whether the current compressor operation frequency is less than the compressor low-load reference frequency, further comprising:
And judging whether the power is firstly electrified, if so, judging whether the running frequency of the current compressor is smaller than the low-load reference frequency of the compressor.
6. The air conditioner operation control method according to claim 1, wherein the controlling the operation of the external fan based on the external fan operation reference curve comprises:
Judging the rotating speed of the external fan which is increased along with the current condensing temperature; and if the rotating speed of the external fan is increased along with the increase of the condensing temperature to the noise limit value of the external fan, controlling the external fan to run at a stable speed, and after the condensing temperature continues to be increased by a preset section of temperature value range, controlling the rotating speed of the external fan to be increased along with the increase of the condensing temperature.
7. The air conditioner operation control method according to claim 1, comprising, before said determining whether the current compressor operation frequency is less than a compressor low-load reference frequency:
judging whether the current return air temperature in the cabinet is greater than the refrigeration set point temperature or not and adding the product of the return difference temperature and the refrigeration opening requirement;
If the current in-cabinet return air temperature is greater than the refrigeration set point temperature and the product of the return difference temperature and the refrigeration starting requirement is added, controlling the air conditioner to start up and operate, controlling the inner fan to operate based on an inner fan operation curve, controlling the outer fan to operate based on an outer fan curve, and controlling the compressor to operate based on a compressor operation curve.
8. The method of claim 7, further comprising, after said determining whether the current in-cabinet return air temperature is greater than the refrigeration set point temperature and adding the product of the return difference temperature and the refrigeration on demand:
If the current return air temperature in the cabinet is greater than the refrigeration set point temperature and the product of the return difference temperature and the refrigeration opening requirement is added, controlling the EEV to keep the preset valve step for 2.5 to 3.5 minutes, and performing PID (proportion integration differentiation) adjustment on the air conditioner based on the target superheat degree; wherein, carry out PID to the air conditioner based on target superheat degree and adjust includes:
judging the size of T 1-T2;
If T-DeltaT 0'＜T1-T2＜T+ΔT0', controlling the EEV to keep the current valve step inactive;
if T-DeltaT 1'＜T1-T2＜T+ΔT1' and T 1-T2 > T, controlling the EEV to increase the valve step at a first step rate;
If T-DeltaT 1'＜T1-T2＜T+ΔT1' and T 1-T2 < T, controlling the EEV to decrease the valve step at a first step rate;
If T-DeltaT 2'＜T1-T2＜T+ΔT2' and T 1-T2 > T, controlling the EEV to increase the valve step at a second step rate;
if T-DeltaT 2'＜T1-T2＜T+ΔT2' and T 1-T2 < T, controlling the EEV to decrease the valve step at a second step rate;
Wherein, T is the target superheat degree, T 1 is the current compressor suction temperature, T 2 is the current evaporation temperature, deltaT 0 'is the dead zone, deltaT 1' is the fine tuning zone, deltaT 2 'is the coarse tuning zone, and DeltaT 0'、ΔT1'、ΔT2', the first stepping rate and the second stepping rate are sequentially increased.
9. The air conditioner operation control method according to claim 7, wherein the controlling the operation of the inner fan based on the inner fan operation curve comprises:
Judging the size of the current return air temperature in the cabinet;
if the current internal return air temperature of the cabinet is smaller than the upper limit point temperature of the internal fan and is larger than or equal to the lower limit point temperature of the internal fan, controlling the rotation speed of the internal fan to linearly adjust between the lower limit speed of the internal fan and the upper limit speed of the internal fan, wherein the linear adjustment is that the rotation speed of the internal fan is increased along with the increase of the internal return air temperature of the cabinet;
if the current return air temperature in the cabinet is smaller than the full-speed point temperature of the inner fan and is larger than or equal to the upper limit point temperature of the inner fan, controlling the inner fan to operate according to the upper limit speed of the inner fan;
if the current return air temperature in the cabinet is greater than or equal to the full-speed point temperature of the inner fan, controlling the inner fan to operate at the full-speed rotating speed;
and if the current return air temperature in the cabinet is less than the lower limit point temperature of the inner fan, controlling the inner fan to stop running.
10. The air conditioner operation control method according to claim 7, wherein the controlling the operation of the compressor based on the compressor operation curve comprises:
Judging the size of the current return air temperature in the cabinet;
If the current return air temperature in the cabinet is greater than or equal to the temperature of the starting point of the compressor, controlling the compressor to start and operating at the compressor holding frequency for 2.5 to 3.5 minutes;
If the current return air temperature in the cabinet is smaller than the lower limit point temperature of the compressor and is larger than the stop point temperature of the compressor, controlling the operation frequency of the compressor to keep the lower limit frequency operation;
if the current in-cabinet return air temperature is smaller than or equal to the upper limit point temperature of the compressor and is larger than or equal to the lower limit point temperature of the compressor, controlling the operation frequency of the compressor to be adjusted linearly between the lower limit frequency and the upper limit frequency, wherein the linear adjustment is that the operation frequency of the compressor is increased along with the increase of the in-cabinet return air temperature;
If the current return air temperature in the cabinet is higher than the upper limit point temperature of the compressor, controlling the running frequency of the compressor to be the upper limit frequency;
And if the current return air temperature in the cabinet is less than or equal to the stop point temperature of the compressor, controlling the compressor to stop running.
11. The air conditioner operation control method according to claim 7, further comprising, before the control of the compressor to operate based on a compressor operation curve:
Judging the size of the current system operation parameter point;
If the current system operation parameter point is smaller than the primary parameter operation set point, controlling the compressor to operate based on the compressor operation curve;
if the current system operation parameter point is greater than or equal to the primary parameter operation set point and less than the secondary parameter operation set point, controlling the compressor to reduce the frequency raising rate;
if the current system operation parameter point is greater than or equal to the secondary parameter operation set point and less than the tertiary parameter operation set point, controlling the operation frequency of the compressor to maintain the current frequency to continue operation;
If the current system operating parameter point is greater than or equal to the three-level parameter operating set point, controlling the compressor to operate at an increased down-conversion rate until the compressor protection frequency is reduced;
Wherein the current system operating parameter points include: one or more of condensing temperature, module current, exhaust temperature, module temperature; the compressor protection frequency is the lower limit frequency of the compressor.
12. An air conditioner operation device comprising a storage medium and a processor, the storage medium being configured to store a computer program which, when executed by the processor, is capable of implementing the steps of the air conditioner operation control method according to any one of claims 1 to 11.
13. An air conditioner comprising a storage medium and a processor, the storage medium being configured to be capable of storing a computer program which, when executed by the processor, is capable of carrying out the steps of the air conditioner operation control method according to any one of claims 1 to 11.
14. A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program that, when executed by a processor, is capable of implementing the air conditioner operation control method according to any one of claims 1 to 11.
CN202210550638.7A 2022-05-20 2022-05-20 Air conditioner operation control method, operation device, air conditioner and storage medium Active CN114754475B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210550638.7A CN114754475B (en) 2022-05-20 2022-05-20 Air conditioner operation control method, operation device, air conditioner and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210550638.7A CN114754475B (en) 2022-05-20 2022-05-20 Air conditioner operation control method, operation device, air conditioner and storage medium

Publications (2)

Publication Number Publication Date
CN114754475A CN114754475A (en) 2022-07-15
CN114754475B true CN114754475B (en) 2024-04-19

Family

ID=82335815

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210550638.7A Active CN114754475B (en) 2022-05-20 2022-05-20 Air conditioner operation control method, operation device, air conditioner and storage medium

Country Status (1)

Country Link
CN (1) CN114754475B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103115417A (en) * 2013-03-19 2013-05-22 海尔集团公司 Refrigeration method of low temperature environment air conditioner
CN103791585A (en) * 2014-01-17 2014-05-14 苏州海特温控技术有限公司 Method for controlling external direct current fan of cabinet air conditioner
WO2015006955A1 (en) * 2013-07-18 2015-01-22 杭州三花研究院有限公司 Method for controlling vehicle air-conditioning system, and vehicle air-conditioning system
CN108151250A (en) * 2017-12-26 2018-06-12 海信（山东）空调有限公司 Control method for frequency conversion air conditioner and device
CN112066521A (en) * 2020-08-06 2020-12-11 曙光节能技术（北京）股份有限公司 Control system and method for low-load dehumidification precise air conditioner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008054081B4 (en) * 2008-10-31 2011-02-03 Seifert Mtm Systems Malta Ltd. Method for conditioning a control cabinet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103115417A (en) * 2013-03-19 2013-05-22 海尔集团公司 Refrigeration method of low temperature environment air conditioner
WO2015006955A1 (en) * 2013-07-18 2015-01-22 杭州三花研究院有限公司 Method for controlling vehicle air-conditioning system, and vehicle air-conditioning system
CN103791585A (en) * 2014-01-17 2014-05-14 苏州海特温控技术有限公司 Method for controlling external direct current fan of cabinet air conditioner
CN108151250A (en) * 2017-12-26 2018-06-12 海信（山东）空调有限公司 Control method for frequency conversion air conditioner and device
CN112066521A (en) * 2020-08-06 2020-12-11 曙光节能技术（北京）股份有限公司 Control system and method for low-load dehumidification precise air conditioner

Also Published As

Publication number Publication date
CN114754475A (en) 2022-07-15

Similar Documents

Publication Publication Date Title
CN107642873B (en) Air conditioner and opening control method of electronic expansion valve during starting of air conditioner
CN110671777B (en) Control method and device of air conditioner and air conditioner
US10495364B2 (en) System and method for controlling vapor compression systems
CN112066521B (en) Control system and method for low-load dehumidification precise air conditioner
CN111895630B (en) Air conditioner operation control method, air conditioner and storage medium
CN113188230B (en) Expansion valve control method and device of multi-connected air conditioner and multi-connected air conditioner
CN113719964B (en) Air conditioner control method and device and air conditioner
CN110296515A (en) Promote control method, device, air conditioner and the storage medium of air conditioning comfortableness
JP2012072920A (en) Refrigeration apparatus
CN113639416A (en) Control method of variable frequency air conditioner
CN114322249A (en) Exhaust pressure adjusting method and device of air conditioner and air conditioner
US20120117995A1 (en) Energy Saving Device And Method For Cooling And Heating Apparatus
JP2008275216A (en) Air conditioner
JP2010164270A (en) Multiple chamber type air conditioner
CN114754475B (en) Air conditioner operation control method, operation device, air conditioner and storage medium
WO2023185369A1 (en) Variable-frequency air conditioner, and control method and control apparatus therefor
CN116817422A (en) Control method of multi-split air conditioner, multi-split air conditioner and storage medium
JP3156191B2 (en) Air conditioner
WO2020151113A1 (en) Control method and control device for indirect evaporation cooling outdoor fan
CN114857665A (en) Multi-split system
KR20100088426A (en) Control method of air conditioner for vehicle
CN115247858A (en) Air conditioner, control method thereof, and computer-readable storage medium
CN111288695B (en) Air conditioning system and parameter configuration method, device, control method and control device thereof
CN114484786A (en) Temperature and humidity control method of air conditioner, controller, air conditioner and storage medium
JP6370425B2 (en) Air conditioner using direct expansion coil

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant