CN111649442B - Air conditioner control method and device, air conditioner and storage medium - Google Patents

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

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CN111649442B
CN111649442B CN202010544751.5A CN202010544751A CN111649442B CN 111649442 B CN111649442 B CN 111649442B CN 202010544751 A CN202010544751 A CN 202010544751A CN 111649442 B CN111649442 B CN 111649442B
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temperature
compressor
air conditioner
frequency
current
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CN111649442A (en
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周候棉
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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

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

Abstract

The invention provides an air conditioner control method, an air conditioner control device, an air conditioner and a storage medium, and relates to the technical field of air conditioners, wherein when the air conditioner runs in a refrigeration mode, a compressor is controlled to increase the frequency after the air conditioner is determined to run in a safe range; then, the frequency of the compressor is increased or decreased by detecting the temperature of the outer disk, the current of the compressor, the discharge temperature, the operation frequency of the compressor, and the indoor ambient temperature. That is, the invention determines the operation frequency of the compressor by balancing the operation safety of the system and the refrigeration requirement of the user, thereby giving consideration to the refrigeration capacity and the operation reliability of the air conditioner and playing the best refrigeration effect of the air conditioner in any occasion.

Description

Air conditioner control method and device, air conditioner and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner control method and device, an air conditioner and a storage medium.
Background
The operation frequency of the compressor of the existing inverter air conditioner is generally adjusted according to a linear function curve taking the outdoor environment temperature as a reference, that is, the operation frequency of the compressor is determined according to the outdoor environment temperature and the linear function curve.
However, with the increasing popularization of air conditioners, the market has increasingly stringent requirements on the air conditioners, the defect that the operation frequency of the compressor is controlled by utilizing a linear function curve is more and more obvious, and the refrigeration capacity and the system operation reliability of the air conditioner cannot be considered at the same time.
Disclosure of Invention
The invention solves the problem that the refrigeration capacity of an air conditioner and the operation reliability of a system cannot be considered in the conventional linear function curve control mode.
In order to solve the above problems, the present invention provides an air conditioner control method, including: when the air conditioner operates in a safety range, controlling the compressor to increase the frequency according to a preset value; acquiring the temperature of an outer disc of the air conditioner, the current of a compressor, the exhaust temperature, the running frequency of the compressor and the indoor environment temperature; comparing the outer disc temperature, the compressor current, the exhaust temperature and the compressor operating frequency with corresponding preset safety thresholds respectively to obtain a first result; comparing the indoor environment temperature with the indoor set temperature to obtain a second result; controlling the frequency up-down of the compressor according to the first result and the second result.
Compared with the prior art, the air conditioner control method has the following advantages: when the air conditioner operates in a refrigeration mode, controlling the compressor to increase the frequency after the air conditioner is determined to operate in a safe range; then, the frequency of the compressor is increased or decreased by detecting the temperature of the outer disk, the current of the compressor, the discharge temperature, the operation frequency of the compressor, and the indoor ambient temperature. That is, the invention determines the operation frequency of the compressor by balancing the operation safety of the system and the refrigeration requirement of the user, thereby giving consideration to the refrigeration capacity and the operation reliability of the air conditioner and playing the best refrigeration effect of the air conditioner in any occasion.
Further, the step of controlling the frequency up-down of the compressor according to the first result and the second result includes:
when the first result is that at least one of the outer disc temperature, the compressor current, the exhaust temperature and the compressor operation frequency reaches a first proportion of a corresponding preset safety threshold value, or the second result is that the indoor environment temperature reaches the sum of the indoor set temperature and a preset temperature value, controlling the compressor to increase the frequency according to a first set value;
and/or when the first result is that at least one of the outer disc temperature, the compressor current and the exhaust temperature reaches a second proportion of a corresponding preset safety threshold, or the first result is that the compressor operation frequency reaches a third proportion of a corresponding preset safety threshold, or the second result is that the indoor environment temperature reaches the indoor set temperature, stopping the frequency increase of the compressor, and controlling the compressor to operate at the current frequency;
and/or, when the first result is that any one of the outer disc temperature, the compressor current and the exhaust temperature reaches the third ratio of a corresponding preset safety threshold, or the indoor environment temperature reaches the difference between the indoor set temperature and the preset temperature value, controlling the compressor to reduce the frequency according to a second set value until the frequency of the compressor reaches the set ratio of the current frequency, wherein the first ratio, the second ratio and the third ratio are sequentially increased;
after the frequency of the compressor reaches the set proportion of the current frequency, continuously detecting the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature;
and controlling the operation of the air conditioner according to the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature.
Further, the step of controlling the operation of the air conditioner according to the outer disc temperature, the compressor current, the discharge temperature, and the indoor ambient temperature includes:
if any one of the outer disc temperature, the compressor current and the exhaust temperature reaches a corresponding preset safety threshold, controlling the air conditioner to stop, and restarting after a preset duration;
and/or if the outer disc temperature, the compressor current and the exhaust temperature exceed a fourth proportion of corresponding preset safety thresholds and do not reach the corresponding preset safety thresholds, or the outer disc temperature, the compressor current and the exhaust temperature do not reach the fourth proportion of corresponding preset safety thresholds and the indoor environment temperature is less than or equal to the indoor set temperature, controlling the compressor to operate at the current frequency;
and/or if the outer disc temperature, the compressor current and the exhaust temperature do not reach the fourth proportion corresponding to the preset safety threshold value, and the indoor environment temperature is greater than or equal to the sum of the indoor set temperature and the preset temperature value, returning to the step of controlling the compressor to increase frequency according to the preset value.
Further, the first proportion is 80% -82%, and/or the second proportion is 90% -92%, and/or the third proportion is 95% -97%, and/or the fourth proportion is 90% -92%, and/or the set proportion is 60% -65%; and/or the preset temperature value is 1-2 ℃; and/or the preset value is 1Hz/2 s-1 Hz/3 s; and/or the first set value is 1Hz/4 s-1 Hz/5 s; and/or the second set value is 2 Hz/s-3 Hz/s; and/or the preset time is 3-4 min.
Further, before the step of controlling the compressor to increase the frequency according to the preset value when the air conditioner operates in the safe range, the air conditioner control method further includes: in the refrigerating operation process of the air conditioner, the temperature of the outer disc of the air conditioner, the current of the compressor and the exhaust temperature are obtained in real time; judging whether the temperature of the outer disc, the current of the compressor and the exhaust temperature do not reach corresponding preset safety thresholds or not; if not, judging that the air conditioner does not operate in the safety range, and controlling the compressor to stop operating; and if so, judging that the air conditioner operates in the safety range.
Further, before the step of detecting the temperature of the outer disk of the air conditioner, the current of the compressor and the exhaust temperature in real time during the cooling operation of the air conditioner, the air conditioner control method further includes: when a refrigeration starting signal is received, controlling the air conditioner to start and run and entering a refrigeration mode; and controlling the compressor to run at a preset initial frequency for a set time.
Further, the preset initial frequency is 30 Hz-35 Hz, and/or the set time length is 120 s-130 s.
Further, the air conditioner control method further includes: and repeatedly executing the steps until a stop signal is received or the air conditioner is powered off, and controlling the air conditioner to stop.
The present invention also provides an air conditioner control device, including: the control module is used for controlling the compressor to increase the frequency according to a preset value when the air conditioner operates in a safe range; the acquisition module is used for acquiring the temperature of an outer disc of the air conditioner, the current of a compressor, the exhaust temperature, the running frequency of the compressor and the indoor environment temperature; the comparison module is used for comparing the outer disc temperature, the compressor current, the exhaust temperature and the compressor operating frequency with corresponding preset safety thresholds respectively to obtain a first result; the comparison module is further used for comparing the indoor environment temperature with the indoor set temperature to obtain a second result; the control module is further configured to control the frequency up-down of the compressor according to the first result and the second result.
The present invention also provides an air conditioner, comprising: one or more processors; a memory for storing one or more programs, which when executed by the one or more processors, cause the one or more processors to implement the air conditioner control method described above.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the air conditioner control method described above.
Drawings
Fig. 1 is a linear function graph.
Fig. 2 is a block diagram of an air conditioner according to the present invention.
Fig. 3 is a schematic flow chart of a control method of an air conditioner according to the present invention.
Fig. 4 is another schematic flow chart of the air conditioner control method provided by the present invention.
Fig. 5 is a schematic diagram illustrating an application of the air conditioner control method according to the present invention.
Fig. 6 is a block diagram of an air conditioner control device according to the present invention.
Description of reference numerals:
10-an air conditioner; 11-a processor; 12-a memory; 13-a bus; 100-air conditioner control device; 110-a control module; 120-an acquisition module; 130-an alignment module; 140-execution module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The compressor operating frequency of the conventional inverter air conditioner is generally adjusted according to a linear function curve based on the outdoor ambient temperature, and the linear function curve is shown in fig. 1, in which the horizontal axis of fig. 1 is the outdoor ambient temperature and the vertical axis is the compressor operating frequency. In the operation process of the air conditioner, the outdoor environment temperature is collected, then the corresponding operation frequency of the compressor is determined from the linear function curve according to the outdoor environment temperature, and then the compressor is controlled to operate at the frequency.
However, as the air conditioner is increasingly popularized, the market demands for the air conditioner are increasingly strict, and the disadvantage of controlling the operation frequency of the compressor by using the linear function curve is more and more obvious. For example, the annual average temperature in tropical regions is very high, and the air conditioner is required to ensure sufficient refrigeration effect when the outdoor environment temperature reaches 40 ℃ or even 43 ℃.
However, the maximum temperature of the zone does not normally exceed 43 ℃, so that it is not necessary to maintain a high-efficiency cooling capacity above 43 ℃, but rather the cooling capacity of the system should be reduced to ensure the operational reliability of the system. If the linear function curve control mode shown in FIG. 1 is adopted, the refrigeration capacity at the temperature below 43 ℃ is not ensured, and the system operation reliability above 43 ℃ is sacrificed; the refrigeration capacity at the temperature below 43 ℃ is not sacrificed, and the system operation reliability above 43 ℃ is ensured. Obviously, it is difficult to take into account both the refrigeration capacity and the system operation reliability by using the linear function curve control method shown in fig. 1.
In order to solve the technical problems, the invention cancels the traditional linear function curve control mode, and controls the frequency increasing or reducing of the compressor by detecting the exhaust temperature, the outer disc temperature, the compressor current and the indoor environment temperature in real time, thereby giving consideration to the refrigeration capacity and the system operation reliability of the air conditioner, and playing the best refrigeration effect of the air conditioner in any occasion. As described in detail below.
Referring to fig. 2, fig. 2 is a block diagram of an air conditioner 10 according to the present invention, in which the air conditioner 10 includes a processor 11, a memory 12 and a bus 13, and the processor 11 and the memory 12 are connected by the bus 13.
The memory 12 is used to store a program such as the air conditioner control device 100 shown in fig. 6. The air conditioner control device 100 includes at least one software functional module that can be stored in the memory 12 in the form of software or firmware (firmware). The processor 11, upon receiving the execution instruction, executes the program to implement the air conditioner control method disclosed in the following embodiment.
The processor 11 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the air conditioner testing method may be implemented by an integrated logic circuit of hardware in the processor 11 or instructions in the form of software. The Processor 11 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components.
On the basis of the air conditioner 10 shown in fig. 2, a possible implementation manner of an air conditioner control method is given below, specifically, fig. 3 is a schematic flow chart of the air conditioner control method provided by the present invention, and referring to fig. 3, the air conditioner control method may include the steps of:
and S101, controlling the compressor to increase the frequency according to a preset value when the air conditioner operates in a safe range.
The air conditioner 10 is operated in a safe range, which means that the air conditioner 10 is stably operated for a period of time (for example, 2min), and each operation index of the air conditioner 10 does not exceed a respective safety threshold in the period of time. For example, the compressor current, the discharge temperature, and the outer disc temperature do not exceed the respective safety thresholds, i.e., the compressor current does not exceed the safety threshold for the compressor current, the discharge temperature does not exceed the safety threshold for the discharge temperature, and the outer disc temperature does not exceed the safety threshold for the outer disc temperature.
The safety threshold of the compressor current, the safety threshold of the exhaust temperature and the safety threshold of the outer disc temperature are preset, wherein the safety threshold of the compressor current and the safety threshold of the exhaust temperature refer to the nominal maximum current and the maximum operation exhaust temperature in the specification of the compressor.
The safety threshold of the temperature of the outer disc refers to the safety threshold of the temperature of the coil of the outdoor heat exchanger, which is determined according to the pressure bearing capacity of the system and depends on the air tightness of the compressor, the pressure bearing capacity of the coil of the heat exchanger and the pressure bearing capacity of the pipeline piece. The air tightness of the compressor refers to the maximum pressure value (for example, 4.3MPa) that the compressor can bear, and when the pressure value is exceeded, the air tightness of the compressor cannot be ensured, and high-pressure gaseous refrigerant leakage accidents are easy to occur; the pressure-bearing capacity of the heat exchanger coil refers to the maximum pressure value (for example, 4.4MPa) which can be borne by a copper pipe of the heat exchanger, and the system has leakage risk when the pressure-bearing capacity exceeds the maximum pressure value; therefore, it is ensured that the system operating pressure cannot exceed the minimum of the two maximum pressure values, for example, 4.3MPa, during the design of the air conditioner. Meanwhile, the air conditioning system uses the R410A refrigerant, and the saturation temperature corresponding to the pressure of 4.3MPa is about 66 ℃, so the safety threshold of the outer disk temperature can be set to 66 ℃ or a value smaller than 66 ℃, and once the outer disk temperature is detected to reach the safety threshold, the machine must be stopped to ensure the safe operation of the system.
In addition, a safety threshold of the compressor operation frequency is preset, and the safety threshold of the compressor operation frequency refers to the maximum nominal operable frequency in the specification of the compressor.
For example, for a 2P air conditioner of R410A refrigerant, the nominal maximum current in the compressor specification is 15A, the maximum operation exhaust temperature is 115 ℃, the maximum operable frequency is 120HZ, and the minimum value of the maximum pressure value that the compressor can bear and the maximum pressure value that the heat exchanger copper tube can bear is 4.3MPa, the safety thresholds of the compressor current, the exhaust temperature, the compressor operation frequency, and the outer disk temperature can be set to 15A, 115 ℃, 120HZ, and 66 ℃ (4.3MPa corresponds to the refrigerant saturation pressure of 66 ℃).
Alternatively, the preset value may be 1Hz/2s to 1Hz/3s, typically 1Hz/2 s. That is, when the air conditioner is operated within the safety range, the compressor is controlled to be upscaled at 1Hz/2 s.
S102, obtaining the temperature of an outer disc of the air conditioner, the current of a compressor, the exhaust temperature, the running frequency of the compressor and the indoor environment temperature.
S103, comparing the outer disc temperature, the compressor current, the exhaust temperature and the compressor running frequency with corresponding preset safety thresholds respectively to obtain a first result.
The first result comprises a comparison result of the safety threshold of the outer disc temperature and the outer disc temperature, a comparison result of the safety threshold of the compressor current and the compressor current, a comparison result of the safety threshold of the exhaust temperature and the exhaust temperature, and a comparison result of the safety threshold of the compressor operation frequency and the compressor operation frequency.
And S104, comparing the indoor environment temperature with the indoor set temperature to obtain a second result.
The second result is a comparison result of the indoor ambient temperature and the indoor set temperature. The indoor set temperature is a target temperature for cooling or heating manually set by a user through a remote controller or a line controller, and in this embodiment, is a target temperature for cooling. The indoor set temperature corresponds to a target value of the indoor temperature, and when the indoor temperature reaches the indoor set temperature, the air conditioner 10 stops operating; when the indoor temperature is lower or higher than the indoor set temperature, the air conditioner 10 is operated again, and so on.
And S105, controlling the frequency up-down of the compressor according to the first result and the second result.
In one embodiment, when the air conditioner operates in the safe range, the controlling the compressor frequency to perform the staged frequency up-down operation according to the first result and the second result, so as to simultaneously consider the cooling capacity and the system operation reliability of the air conditioner 10, specifically may include:
step one, controlling a compressor to increase the frequency according to 1Hz/2s until one or more of the temperature of an outer disc, the current of the compressor, the exhaust temperature and the running frequency of the compressor reaches 80% of respective safety threshold values, or the indoor environment temperature reaches the indoor set temperature plus 1 ℃;
when the air conditioner 10 operates in the safe range, the compressor can be controlled to increase the frequency according to the preset value, and the frequency increasing rate can be properly fast due to the fact that the operating frequency of the compressor is low at the moment, so that quick refrigeration is achieved, and user experience is improved.
The decision value "80% of the safe threshold" is the first stage decision value, in order to leave 20% margin to prevent the over-safe threshold from being caused by too fast up-conversion; the' indoor set temperature +1 ℃ is used as one of judgment conditions and is also used as prejudgment to prevent the user comfort from being influenced by the fact that the indoor environment temperature is reduced too fast due to too fast refrigeration.
Secondly, controlling the compressor to increase the frequency according to 1Hz/4s until one or more of the temperature of the outer disk, the current of the compressor and the exhaust temperature reaches 90% of the respective safety threshold, or the running frequency of the compressor reaches 95% of the corresponding safety threshold, or the indoor environment temperature reaches the indoor set temperature;
thirdly, stopping raising the frequency, and controlling the compressor to keep the current frequency to continuously operate;
when one or more of the detected outer disk temperature, the detected compressor current, the detected exhaust temperature and the detected compressor running frequency reach a safety threshold of 80 percent, or the detected indoor environment temperature is basically close to a user set value, the frequency increasing rate needs to be halved, and the situation that each parameter is out of control due to the fact that the frequency increasing is too fast is prevented.
The judgment value '90% of the safety threshold' is a second-stage judgment value, and the purpose is to leave 10% of margin to prevent each parameter from exceeding the safety threshold; "the compressor operation frequency reaches 95% of the corresponding safety threshold" as one of the determination conditions is to prevent the compressor operation frequency from being excessively high; the 'indoor set temperature' is used as one of judgment conditions and is also used as prejudgment to prevent the user comfort from being influenced by the fact that the indoor environment temperature is reduced too fast due to too fast refrigeration.
Fourthly, continuously detecting the temperature of the outer disc, the current of the compressor, the exhaust temperature, the running frequency of the compressor and the indoor environment temperature, and controlling the compressor to reduce the frequency to 60 percent of the current frequency according to 2Hz/s if one or more of the temperature of the outer disc, the current of the compressor and the exhaust temperature reaches 95 percent of the respective safety threshold value or the indoor environment temperature reaches-1 ℃ of the indoor set temperature;
the decision value '95% of the safety threshold' is a third-stage decision value, and the purpose is to leave 5% of margin to prevent each parameter from exceeding the safety threshold after frequency reduction; the' indoor set temperature of-1 ℃ is used as one of the judgment conditions, and the phenomenon that the user experience is influenced due to the fact that the indoor environment temperature exceeds the set value of the user too much due to too fast refrigeration is prevented.
Rapidly reducing the frequency to 60% of the current frequency, aiming at reducing the load of the air conditioner and simultaneously rapidly reducing the temperature of an outer disc, the current of a compressor and the exhaust temperature; the purpose of setting the frequency reduction target to be 60% of the current frequency without being lower is to ensure the system safety and guarantee the refrigeration effect to a certain degree at the same time, and prevent the refrigeration effect of the air conditioner from being recovered too slowly after various parameters are recovered to be normal.
Fifthly, continuously detecting the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature, and if any one of the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature reaches the respective safety threshold, stopping the machine for 3min and then restarting the machine; if the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature do not reach the respective safety threshold but are all more than 90% of the respective safety threshold, or the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature are all less than 90% of the respective safety threshold and the indoor environment temperature is less than or equal to the indoor set temperature, controlling the compressor to keep the current frequency to continuously operate; and if the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature are all below 90% of the respective safety threshold values and the indoor environment temperature is more than or equal to the indoor set temperature plus 1 ℃, returning to the first step.
After the frequency is reduced, if any value of the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature can reach a safety threshold, immediately stopping for protection to ensure the safe operation of the system; meanwhile, all parameters of the system are still in high level after the frequency reduction, if the indoor environment temperature is less than or equal to a user set value, the frequency after the frequency reduction can be kept to continue running, but further frequency increase is forbidden; if all the parameters are below 90% of the safety threshold, the indoor environment temperature needs to be synchronously confirmed, and when the indoor environment temperature exceeds the user set value plus 1 ℃, the frequency is increased again according to the process, so that the discomfort of the user caused by excessive refrigeration is avoided.
In this embodiment, the detection time interval of the parameters such as the temperature of the external disk, the current of the compressor, the exhaust temperature, the operation frequency of the compressor, the indoor environment temperature, etc. may be once every 0.1s, or the shortest time that the software can implement, so as to increase the reaction speed of the system.
As described in detail below with respect to step S105, step S105 may include the following sub-steps:
s1051, when the first result is that at least one of the temperature of the outer disk, the current of the compressor, the exhaust temperature and the running frequency of the compressor reaches a first proportion of a corresponding preset safety threshold value, or the second result is that the indoor environment temperature reaches the sum of the indoor set temperature and the preset temperature value, controlling the compressor to increase the frequency according to the first set value.
Alternatively, the first proportion may be 80% to 82%, typically 80%. The first set point may be 1Hz/4s to 1Hz/5s, typically 1Hz/4 s. The predetermined temperature value may be 1 ℃ to 2 ℃, typically 1 ℃.
And S1052, when the first result is that at least one of the temperature of the outer disk, the current of the compressor and the exhaust temperature reaches a second proportion of a corresponding preset safety threshold, or the first result is that the running frequency of the compressor reaches a third proportion of a corresponding preset safety threshold, or the second result is that the indoor environment temperature reaches an indoor set temperature, stopping the frequency increase of the compressor, and controlling the compressor to run at the current frequency.
Alternatively, the second proportion is between 90% and 92%, typically 90%. The third proportion is 95% to 97%, typically 95%.
S1053, when the first result is that any one of the temperature of the outer disk, the current of the compressor and the exhaust temperature reaches a third proportion of a corresponding preset safety threshold value, or the indoor environment temperature reaches the difference between the indoor set temperature and the preset temperature value, controlling the compressor to reduce the frequency according to a second set value until the frequency of the compressor reaches the set proportion of the current frequency, wherein the first proportion, the second proportion and the third proportion are sequentially increased.
Alternatively, the third proportion is 95% to 97%, typically 95%. The second set point may be 2Hz/s to 3Hz/s, typically 2 Hz/s. The predetermined temperature value may be 1 ℃ to 2 ℃, typically 1 ℃.
And S1054, after the frequency of the compressor reaches the set proportion of the current frequency, continuously detecting the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature.
Alternatively, the set ratio is 60% to 65%, typically 60%.
And S1055, controlling the operation of the air conditioner according to the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature.
It should be noted that, the sub-steps S1051, S1052 and S1053 are and/or relationships, that is, the step S105 may include these three sub-steps, and may also include one or two of these three sub-steps.
As will be described in detail below with respect to sub-step S1055, sub-step S1055 may include the following sub-steps:
s1055-1, if any one of the temperature of the outer disk, the current of the compressor and the exhaust temperature reaches a corresponding preset safety threshold value, controlling the air conditioner to stop, and restarting after a preset duration.
After the frequency is reduced, if any value of the temperature of the outer disk, the current of the compressor, the exhaust temperature and the indoor environment temperature can reach a safety threshold, the system is immediately shut down for protection, and the system is ensured to run safely. Alternatively, the preset time period may be 3min to 4min, typically 3 min.
S1055-2, if the outer disc temperature, the compressor current and the exhaust temperature exceed the fourth proportion of the corresponding preset safety threshold and do not reach the corresponding preset safety threshold, or the outer disc temperature, the compressor current and the exhaust temperature do not reach the fourth proportion of the corresponding preset safety threshold and the indoor environment temperature is less than or equal to the indoor set temperature, controlling the compressor to operate at the current frequency.
Alternatively, the fourth proportion is between 90% and 92%, typically 90%. And various parameters of the system are still in high level after the frequency is reduced, if the indoor environment temperature is less than or equal to the set value of a user, the frequency after the frequency is reduced can be kept to continue running, but further frequency increasing is forbidden.
S1055-3, if the temperature of the outer disk, the current of the compressor and the exhaust temperature do not reach the fourth proportion corresponding to the preset safety threshold value, and the indoor environment temperature is greater than or equal to the sum of the indoor set temperature and the preset temperature value, returning to the step of controlling the compressor to increase the frequency according to the preset value, namely returning to the step S101 in the figure 2.
Alternatively, the fourth proportion is between 90% and 92%, typically 90%. The predetermined temperature value may be 1 ℃ to 2 ℃, typically 1 ℃. If all the parameters are below 90% of the safety threshold, the indoor environment temperature needs to be synchronously confirmed, and when the indoor environment temperature exceeds the user set value plus 1 ℃, the frequency is increased again according to the process, so that the discomfort of the user caused by excessive refrigeration is avoided.
It should be noted that there is an and/or relationship between the sub-steps S1055-1, S1055-2 and S1055-3, that is, the sub-step S1055 may include these three sub-steps, and may also include one or two of these three sub-steps.
After step S105 is executed, steps S101 to S105 are executed in a loop until a shutdown signal or power failure of a user is received, and the air conditioner 10 is controlled to be stopped, so on the basis of fig. 3, fig. 4 is another flow chart of the air conditioner control method provided by the present invention, please refer to fig. 4, and after step S105, the air conditioner control method further includes step S106.
And S106, repeatedly executing the steps until a stop signal is received or the air conditioner is powered off, and controlling the air conditioner to stop.
In a possible scenario, the above steps are described in terms of controlling the compressor frequency to perform staged frequency raising and lowering when the air conditioner 10 is operating in a safe range, and before that, it is first required to detect whether the air conditioner 10 is operating in a safe range. Therefore, referring to fig. 4 again, before step S101, the air conditioner control method further includes steps S130 to S160.
And S130, acquiring the temperature of an outer disc of the air conditioner, the current of a compressor and the exhaust temperature in real time in the refrigerating operation process of the air conditioner.
Real-time acquisition means that the time interval for acquisition may be every 0.1s for detection, or the shortest time that software can achieve.
And S140, judging whether the temperature of the outer disc, the current of the compressor and the exhaust temperature do not reach corresponding preset safety thresholds.
If not, namely any one of the temperature of the outer disc, the current of the compressor and the exhaust temperature reaches the corresponding preset safety threshold value, executing the step S150; if yes, that is, the outer disk temperature, the compressor current and the exhaust temperature do not reach the corresponding preset safety thresholds, step S160 is executed.
And S150, judging that the air conditioner does not operate in a safe range, and controlling the compressor to stop operating.
And S160, judging that the air conditioner operates in a safe range.
In one possible scenario, when the user turns on the cooling of the air conditioner 10 through a remote controller or a line controller, the initial frequency of the compressor may be a little higher, so that the frequency can be increased quickly to increase the cooling speed. Therefore, referring to fig. 4 again, before step S130, the air conditioner control method further includes steps S110 to S120.
And S110, controlling the air conditioner to start and operate and entering a refrigeration mode when receiving the refrigeration starting signal.
And S120, controlling the compressor to operate at a preset initial frequency for a set time.
Alternatively, the preset initial frequency may be 30Hz to 35Hz, typically 30 Hz. The set time period may be 120s to 130s, typically 120 s.
That is, the compressor is turned on upon receiving the cooling turn-on signal, and the compressor is operated at a default initial frequency (e.g., 30Hz) for 120s in order to rapidly cool the air conditioner 10.
The initial frequency is set to be 30Hz, the refrigeration speed can be increased compared with the frequency increase from 0Hz, and the problem of overproof vibration stress caused by low-frequency operation can be avoided; the operation is performed for 120s at the initial frequency, so as to confirm whether the parameters of the system are normal.
Further, in order to better explain the embodiment of the present invention, the following describes the air conditioner control method provided in the embodiment by using an application example shown in fig. 5, and as shown in fig. 5, the air conditioner control method provided in the embodiment may include the following processes:
and S1, receiving the refrigeration starting signal, starting the air conditioner to run and entering a refrigeration mode.
S2, the compressor is run at an initial frequency (e.g., 30Hz) for a set period of time (e.g., 120S) and the outer disc temperature, compressor current, and discharge temperature are continuously sensed (e.g., 0.1S/time).
And S3, judging whether the temperature of the outer disc, the current of the compressor and the exhaust temperature all do not reach the corresponding preset safety threshold value.
If yes, namely the temperature of the outer disc, the current of the compressor and the exhaust temperature do not reach the corresponding preset safety threshold, executing step S5; if not, that is, any one of the outer disk temperature, the compressor current and the exhaust temperature reaches the corresponding preset safety threshold, step S4 is executed.
And S4, reporting the fault and stopping the compressor.
And S5, increasing the frequency according to 1Hz/2S until any one of the temperature of the outer disc, the current of the compressor, the exhaust temperature and the running frequency of the compressor reaches 80% of the corresponding safety threshold, or the indoor environment temperature reaches the indoor set temperature plus 1 ℃.
And S6, increasing the frequency according to 1Hz/4S until any one of the temperature of the outer disc, the current of the compressor and the exhaust temperature reaches 90% of the corresponding safety threshold, or the running frequency of the compressor reaches 95% of the corresponding safety threshold, or the indoor environment temperature reaches the indoor set temperature.
And S7, stopping frequency increase, and keeping the current frequency to continue running until any one of the outer disc temperature, the compressor current and the exhaust temperature reaches 95% of the corresponding safety threshold, or the indoor environment temperature reaches the indoor set temperature of-1 ℃.
And S8, reducing the running frequency of the compressor to 60% of the current frequency according to 2Hz/S, and continuously detecting the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature.
After the outer panel temperature, the compressor current, the discharge temperature, and the indoor ambient temperature are detected, there are 3 branches to the control method of the air conditioner 10, i.e., S9 to S10, S11 to S12, and S13, according to the outer panel temperature, the compressor current, the discharge temperature, and the indoor ambient temperature.
And S9, any one of the outer disc temperature, the compressor current and the exhaust temperature reaches a corresponding preset safety threshold value.
And S10, restarting after stopping for 3 min.
And S11, any one of the temperature of the outer disc, the current of the compressor and the exhaust temperature exceeds 90% of the safety threshold and is less than the safety threshold, or the temperature of the indoor environment is less than or equal to 90% of the safety threshold and is less than or equal to the indoor set temperature.
S12, the compressor continues to maintain the current frequency operation.
S13, if any one of the temperature of the outer disk, the current of the compressor and the exhaust temperature is below 90% of the safety threshold value, and the indoor environment temperature is more than or equal to the indoor set temperature plus 1 ℃, the step S5 is executed again.
In order to perform the corresponding steps in the above-described embodiments and various possible embodiments, an implementation of the air conditioner control device is given below. Fig. 6 is a schematic functional block diagram of an air conditioner control device 100 according to the present invention. It should be noted that the basic principle and the technical effects of the air conditioner control device 100 described in this embodiment are the same as those of the foregoing method embodiment, and for the sake of brief description, reference may be made to the corresponding contents of the foregoing method embodiment for the parts that are not mentioned in this embodiment. The air conditioner control device 100 is applied to an air conditioner 10, and the air conditioner control device 100 is described below with reference to fig. 6, and the air conditioner control device 100 includes: a control module 110, an obtaining module 120 and a comparing module 130.
And the control module 110 is used for controlling the compressor to increase the frequency according to a preset value when the air conditioner operates in a safe range.
The obtaining module 120 is configured to obtain an outer disc temperature, a compressor current, an exhaust temperature, a compressor operating frequency, and an indoor environment temperature of the air conditioner.
The comparison module 130 is configured to compare the outer disc temperature, the compressor current, the exhaust temperature, and the compressor operating frequency with corresponding preset safety thresholds, respectively, to obtain a first result.
The comparison module 130 is further configured to compare the indoor ambient temperature with the indoor set temperature to obtain a second result.
The control module 110 is further configured to control the frequency up-down of the compressor according to the first result and the second result.
Optionally, the control module 110 is further configured to repeatedly perform the above steps until the shutdown signal is received or the air conditioner is powered off, and control the air conditioner to shutdown.
Optionally, the control module 110 is specifically configured to:
when the first result is that at least one of the temperature of the outer disc, the current of the compressor, the exhaust temperature and the running frequency of the compressor reaches a first proportion of a corresponding preset safety threshold value, or the second result is that the indoor environment temperature reaches the sum of the indoor set temperature and the preset temperature value, controlling the compressor to increase the frequency according to a first set value;
and/or stopping the frequency increasing of the compressor and controlling the compressor to operate at the current frequency when the first result is that at least one of the temperature of the outer disk, the current of the compressor and the exhaust temperature reaches a second proportion of a corresponding preset safety threshold, or the first result is that the operating frequency of the compressor reaches a third proportion of a corresponding preset safety threshold, or the second result is that the indoor environment temperature reaches the indoor set temperature;
and/or when the first result is that any one of the temperature of the outer disk, the current of the compressor and the exhaust temperature reaches a third proportion of a corresponding preset safety threshold value, or the indoor environment temperature reaches the difference between the indoor set temperature and the preset temperature value, controlling the compressor to reduce the frequency according to a second set value until the frequency of the compressor reaches the set proportion of the current frequency, wherein the first proportion, the second proportion and the third proportion are sequentially increased;
after the frequency of the compressor reaches the set proportion of the current frequency, continuously detecting the temperature of an outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature;
the operation of the air conditioner is controlled according to the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor ambient temperature.
Alternatively, the control module 110 implements a manner of controlling the operation of the air conditioner according to the outer panel temperature, the compressor current, the discharge air temperature, and the indoor ambient temperature, including:
if any one of the temperature of the outer disc, the current of the compressor and the exhaust temperature reaches a corresponding preset safety threshold value, controlling the air conditioner to stop, and restarting after the preset duration;
and/or if the outer disc temperature, the compressor current and the exhaust temperature exceed the fourth proportion of the corresponding preset safety threshold and do not reach the corresponding preset safety threshold, or the outer disc temperature, the compressor current and the exhaust temperature do not reach the fourth proportion of the corresponding preset safety threshold and the indoor environment temperature is less than or equal to the indoor set temperature, controlling the compressor to operate at the current frequency;
and/or if the temperature of the outer disc, the current of the compressor and the exhaust temperature do not reach a fourth proportion corresponding to a preset safety threshold value, and the indoor environment temperature is greater than or equal to the sum of the indoor set temperature and a preset temperature value, returning to execute the step of controlling the compressor to increase the frequency according to the preset value.
Optionally, the air conditioner control device 100 further includes an execution module 140.
The execution module 140 is used for acquiring the temperature of an outer disc of the air conditioner, the current of a compressor and the exhaust temperature in real time in the refrigeration running process of the air conditioner; judging whether the temperature of the outer disc, the current of the compressor and the exhaust temperature do not reach corresponding preset safety thresholds or not; if not, judging that the air conditioner does not operate in the safety range, and controlling the compressor to stop operating; if yes, the air conditioner is judged to be operated in the safety range.
Optionally, the execution module 140 is further configured to control the air conditioner to start and operate and enter a cooling mode when receiving a cooling start signal; and controlling the compressor to run at the preset initial frequency for a set time.
In summary, the air conditioner control method, the air conditioner control device, the air conditioner and the storage medium provided by the invention determine the operation frequency of the compressor by balancing the operation safety of the system and the refrigeration requirement of the user, so that the refrigeration capacity and the system operation reliability of the air conditioner are both considered, and the optimal refrigeration effect of the air conditioner can be exerted in any occasion.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. An air conditioner control method, characterized by comprising:
when the air conditioner (10) operates in a safe range, controlling the compressor to increase the frequency according to a preset value;
acquiring the temperature of an outer disc of the air conditioner (10), the current of a compressor, the exhaust temperature, the running frequency of the compressor and the indoor environment temperature;
comparing the outer disc temperature, the compressor current, the exhaust temperature and the compressor operating frequency with corresponding preset safety thresholds respectively to obtain a first result;
comparing the indoor environment temperature with the indoor set temperature to obtain a second result;
when the first result is that at least one of the outer disc temperature, the compressor current, the exhaust temperature and the compressor operation frequency reaches a first proportion of a corresponding preset safety threshold value, or the second result is that the indoor environment temperature reaches the sum of the indoor set temperature and a preset temperature value, controlling the compressor to increase the frequency according to a first set value;
and/or when the first result is that at least one of the outer disc temperature, the compressor current and the exhaust temperature reaches a second proportion of a corresponding preset safety threshold, or the first result is that the compressor operation frequency reaches a third proportion of a corresponding preset safety threshold, or the second result is that the indoor environment temperature reaches the indoor set temperature, stopping the frequency increase of the compressor, and controlling the compressor to operate at the current frequency;
and/or, when the first result is that any one of the outer disc temperature, the compressor current and the exhaust temperature reaches the third ratio of a corresponding preset safety threshold, or the indoor environment temperature reaches the difference between the indoor set temperature and the preset temperature value, controlling the compressor to reduce the frequency according to a second set value until the frequency of the compressor reaches the set ratio of the current frequency, wherein the first ratio, the second ratio and the third ratio are sequentially increased;
after the frequency of the compressor reaches the set proportion of the current frequency, continuously detecting the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature;
controlling the operation of the air conditioner (10) in dependence on the outer disc temperature, the compressor current, the discharge temperature and the indoor ambient temperature.
2. The air conditioner control method according to claim 1, wherein the step of controlling the operation of the air conditioner (10) in accordance with the outer disc temperature, the compressor current, the discharge air temperature, and the indoor ambient temperature includes:
if any one of the outer disc temperature, the compressor current and the exhaust temperature reaches a corresponding preset safety threshold, controlling the air conditioner (10) to stop, and restarting after a preset duration;
and/or if the outer disc temperature, the compressor current and the exhaust temperature exceed a fourth proportion of corresponding preset safety thresholds and do not reach the corresponding preset safety thresholds, or the outer disc temperature, the compressor current and the exhaust temperature do not reach the fourth proportion of corresponding preset safety thresholds and the indoor environment temperature is less than or equal to the indoor set temperature, controlling the compressor to operate at the current frequency;
and/or if the outer disc temperature, the compressor current and the exhaust temperature do not reach the fourth proportion corresponding to the preset safety threshold value, and the indoor environment temperature is greater than or equal to the sum of the indoor set temperature and the preset temperature value, returning to the step of controlling the compressor to increase frequency according to the preset value.
3. The air conditioner control method according to claim 2, wherein the first ratio is 80% to 82%, and/or the second ratio is 90% to 92%, and/or the third ratio is 95% to 97%, and/or the fourth ratio is 90% to 92%, and/or the set ratio is 60% to 65%;
and/or the preset temperature value is 1-2 ℃;
and/or the preset value is 1Hz/2 s-1 Hz/3 s; and/or the first set value is 1Hz/4 s-1 Hz/5 s;
and/or the second set value is 2 Hz/s-3 Hz/s;
and/or the preset time is 3-4 min.
4. The air conditioner controlling method according to claim 1, wherein before the step of controlling the compressor to be upscaled by a preset value when the air conditioner (10) is operated in a safe range, the air conditioner controlling method further comprises:
in the process of refrigerating operation of the air conditioner (10), acquiring the temperature of the outer disc of the air conditioner (10), the current of the compressor and the exhaust temperature in real time;
judging whether the temperature of the outer disc, the current of the compressor and the exhaust temperature do not reach corresponding preset safety thresholds or not;
if not, judging that the air conditioner (10) does not operate in the safety range, and controlling the compressor to stop operating;
if yes, the air conditioner (10) is judged to be operated in the safety range.
5. The air conditioner controlling method according to claim 4, wherein prior to the step of detecting an outer panel temperature of the air conditioner (10), the compressor current and the discharge air temperature in real time during a cooling operation of the air conditioner (10), the air conditioner controlling method further comprises:
when a refrigeration starting signal is received, controlling the air conditioner (10) to start and run and entering a refrigeration mode;
and controlling the compressor to run at a preset initial frequency for a set time.
6. The air conditioner control method according to claim 5, wherein the preset initial frequency is 30Hz to 35Hz, and/or the set time period is 120s to 130 s.
7. The air conditioner control method according to any one of claims 1 to 6, further comprising:
and repeatedly executing the steps until a stop signal is received or the air conditioner (10) is powered off, and controlling the air conditioner (10) to stop.
8. An air conditioner control device, characterized in that the air conditioner control device (100) comprises:
the control module (110) is used for controlling the compressor to increase the frequency according to a preset value when the air conditioner (10) operates in a safe range;
an acquisition module (120) for acquiring an outer disc temperature, a compressor current, an exhaust temperature, a compressor operating frequency and an indoor ambient temperature of the air conditioner (10);
a comparison module (130) for comparing the outer disc temperature, the compressor current, the exhaust temperature and the compressor operating frequency with corresponding preset safety thresholds respectively to obtain a first result;
the comparison module (130) is further configured to compare the indoor environment temperature with an indoor set temperature to obtain a second result;
the control module (110) is further configured to:
when the first result is that at least one of the outer disc temperature, the compressor current, the exhaust temperature and the compressor operation frequency reaches a first proportion of a corresponding preset safety threshold value, or the second result is that the indoor environment temperature reaches the sum of the indoor set temperature and a preset temperature value, controlling the compressor to increase the frequency according to a first set value;
and/or when the first result is that at least one of the outer disc temperature, the compressor current and the exhaust temperature reaches a second proportion of a corresponding preset safety threshold, or the first result is that the compressor operation frequency reaches a third proportion of a corresponding preset safety threshold, or the second result is that the indoor environment temperature reaches the indoor set temperature, stopping the frequency increase of the compressor, and controlling the compressor to operate at the current frequency;
and/or, when the first result is that any one of the outer disc temperature, the compressor current and the exhaust temperature reaches the third ratio of a corresponding preset safety threshold, or the indoor environment temperature reaches the difference between the indoor set temperature and the preset temperature value, controlling the compressor to reduce the frequency according to a second set value until the frequency of the compressor reaches the set ratio of the current frequency, wherein the first ratio, the second ratio and the third ratio are sequentially increased;
after the frequency of the compressor reaches the set proportion of the current frequency, continuously detecting the temperature of the outer disc, the current of the compressor, the exhaust temperature and the indoor environment temperature;
controlling the operation of the air conditioner (10) in dependence on the outer disc temperature, the compressor current, the discharge temperature and the indoor ambient temperature.
9. An air conditioner, characterized in that the air conditioner (10) comprises:
one or more processors (11);
a memory (12) for storing one or more programs that, when executed by the one or more processors (11), cause the one or more processors (11) to implement the air conditioner control method of any one of claims 1-7.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor (11), implements the air conditioner control method according to any one of claims 1-7.
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