CN113091201B - Frequency control method and device of air conditioner and air conditioner - Google Patents
Frequency control method and device of air conditioner and air conditioner Download PDFInfo
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- CN113091201B CN113091201B CN202110502078.3A CN202110502078A CN113091201B CN 113091201 B CN113091201 B CN 113091201B CN 202110502078 A CN202110502078 A CN 202110502078A CN 113091201 B CN113091201 B CN 113091201B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
Abstract
The embodiment of the invention provides a frequency control method and device of an air conditioner and the air conditioner, and relates to the technical field of air conditioners. The control method comprises the following steps: acquiring the frequency of triggering temperature protection and frequency reduction of the air conditioner; if the frequency of the air conditioner triggering temperature protection frequency reduction is more than or equal to two times, acquiring the interval time of the air conditioner triggering temperature protection frequency reduction; judging whether the interval time is less than or equal to the preset time or not; if the interval time is less than or equal to the preset time, acquiring the current value of the compressor of the air conditioner and the current information of the compressor in the temperature protection frequency reduction period; and controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the current value of the compressor and the current information of the compressor in the temperature protection frequency reduction period. The embodiment of the invention can reduce or avoid the fluctuation of the frequency of the compressor, thereby ensuring the stable operation of the air conditioner and being beneficial to improving the use comfort of the air conditioner.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a frequency control method and device of an air conditioner and the air conditioner.
Background
When the variable frequency air conditioner operates, the operating frequency can be adjusted according to the difference between the set temperature and the room temperature: if the set temperature is not reached, the running frequency of the compressor is increased; and if the set temperature is reached, reducing the running frequency of the compressor, thereby realizing accurate temperature control.
When the air conditioner operates under a severe working condition, on one hand, the compressor is required to increase the frequency because the set temperature is not reached, and the air conditioner operates under high frequency to obtain higher refrigerating and heating capacity. On the other hand, the operating condition is poor, so that the air conditioning load is increased after the high-frequency operation, the pressure is increased, the exhaust temperature is increased, and the use reliability of the air conditioner is influenced. At this time, frequency-limited frequency reduction protection is generally set, when the load becomes high to a certain degree, the frequency is limited to rise, even the frequency is gradually reduced, and finally the air conditioner frequency is operated at the edge of frequency reduction triggering, so that the refrigeration and heating capacity is maximized on the premise of ensuring the reliability.
The existing measures for protecting frequency reduction have the condition of frequent frequency fluctuation, influence on operation stability, bring frequency reduction and noise rise and influence on the use comfort of the air conditioner.
Disclosure of Invention
The invention solves the problem that the frequency of the air conditioner protection is reduced, so that the frequency is frequently fluctuated, and the operation stability and the use comfort are influenced.
In order to solve the above problems, embodiments of the present invention provide a frequency control method and apparatus for an air conditioner, and an air conditioner, which can reduce or avoid fluctuation of a frequency of a compressor, thereby ensuring stable operation of the air conditioner and facilitating improvement of comfort in use of the air conditioner.
In a first aspect, the present invention provides a frequency control method of an air conditioner, the control method comprising: acquiring the frequency of triggering temperature protection and frequency reduction of the air conditioner; judging whether the frequency of the air conditioner triggering temperature protection frequency reduction is more than or equal to two times; if the frequency of triggering the temperature protection frequency reduction by the air conditioner is more than or equal to two times, acquiring the interval time of triggering the temperature protection frequency reduction by the air conditioner; judging whether the interval time is less than or equal to a preset time or not; if the interval time is less than or equal to the preset time, acquiring the current value of the compressor of the air conditioner and the current information of the compressor in the temperature protection frequency reduction period; and controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the current value of the compressor and the current information of the compressor in the temperature protection frequency reduction period.
The embodiment of the invention provides a frequency control method of an air conditioner, which comprises the following steps: according to the frequency control method, when the temperature protection frequency reduction condition triggered by the air conditioner is more than or equal to two times and the interval time is less than the preset time, the current value of the compressor and the current information in the temperature protection frequency reduction period are obtained, the frequency of the compressor is limited, and the compressor can maintain the current frequency or reduce the frequency to operate. In the embodiment of the invention, the current of the compressor and the frequency of the compressor have no hysteresis, and the frequency of the compressor can be timely adjusted, so that the frequency fluctuation of the compressor is reduced or avoided, and the use comfort is improved.
In an alternative embodiment, the step of obtaining the current information of the compressor during the temperature protection down cycle comprises: acquiring a maximum current value and a minimum current value of the compressor in a temperature protection frequency reduction period; the step of controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the current value of the compressor and the current information of the compressor in the temperature protection frequency reduction period comprises the following steps: and controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period and the current value of the compressor.
In an optional embodiment, the step of controlling the compressor to maintain the current frequency operation or the down-conversion operation according to the maximum current value and the minimum current value of the compressor in the temperature protection down-conversion period and the current value of the compressor comprises: judging whether the current value of the compressor is larger than or equal to half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period or not; and if the current value of the compressor is greater than or equal to half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period, controlling the compressor to maintain the current frequency operation or frequency reduction operation.
In an optional embodiment, the step of controlling the compressor to maintain the current frequency operation or the down-conversion operation according to the maximum current value and the minimum current value of the compressor in the temperature protection down-conversion period and the current value of the compressor further includes: and if the current value of the compressor is less than half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period, normally controlling the frequency of the compressor.
In an optional embodiment, the preset time is in a range of 10min to 60 min.
In an optional embodiment, the control method further comprises: acquiring the duration of the current protection and frequency reduction of the air conditioner without triggering; judging whether the duration of the current protection frequency reduction not triggered by the air conditioner is greater than or equal to a preset exit time or not; and if the duration time of the current air conditioner which does not trigger the protection frequency reduction is longer than or equal to the preset exit time, controlling the air conditioner to exit the current frequency limitation.
In an alternative embodiment, the preset exit time ranges from 60min to 200 min.
In a second aspect, the present invention provides a frequency control device of an air conditioner, the frequency control device comprising: a first obtaining module: the frequency acquisition module is used for acquiring the frequency of triggering temperature protection and frequency reduction of the air conditioner; a first judgment module: the frequency control device is used for judging whether the frequency of the air conditioner triggering temperature protection frequency reduction is more than or equal to two times; a second obtaining module: the time interval for triggering the temperature protection frequency reduction by the air conditioner is obtained if the frequency of triggering the temperature protection frequency reduction by the air conditioner is more than or equal to two times; a second judging module: the time interval judging module is used for judging whether the time interval is less than or equal to a preset time or not; a third obtaining module: the current value of the compressor of the air conditioner and the current information of the compressor in the temperature protection frequency reduction period are obtained if the interval time is less than or equal to the preset time; a control module: and the controller is used for controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the current value of the compressor and the current information of the compressor in the temperature protection frequency reduction period.
The frequency control device of the air conditioner provided by the embodiment of the invention comprises: when the temperature protection frequency reduction condition triggered by the air conditioner is more than or equal to two times and the interval time is less than the preset time, the frequency control device limits the frequency of the compressor by acquiring the current value of the compressor and the current information in the temperature protection frequency reduction period, so that the compressor maintains the current frequency or reduces the frequency to operate. In the embodiment of the invention, the current of the compressor and the frequency of the compressor have no hysteresis, and the frequency of the compressor can be timely adjusted, so that the frequency fluctuation of the compressor is reduced or avoided, and the use comfort is improved.
In an optional embodiment, the third obtaining module is further configured to: acquiring a maximum current value and a minimum current value of the compressor in a temperature protection frequency reduction period; the control module is further configured to: and controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period and the current value of the compressor.
In an alternative embodiment, the control module is further configured to: judging whether the current value of the compressor is larger than or equal to half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period or not; and if the current value of the compressor is greater than or equal to half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period, controlling the compressor to maintain the current frequency operation or frequency reduction operation.
In an alternative embodiment, the control module is further configured to: and if the current value of the compressor is less than half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period, normally controlling the frequency of the compressor.
In an alternative embodiment, the control module is further configured to: acquiring the duration of the current protection and frequency reduction of the air conditioner without triggering; judging whether the duration of the current protection frequency reduction not triggered by the air conditioner is greater than or equal to a preset exit time or not; and if the duration time of the current air conditioner which does not trigger the protection frequency reduction is longer than or equal to the preset exit time, controlling the air conditioner to exit the current frequency limitation.
In a third aspect, the present invention provides an air conditioner comprising a controller having stored therein an operable frequency control program which, when read and operated, implements a control method as set out in any one of the preceding embodiments.
The air conditioner provided by the embodiment of the invention can limit the frequency of the compressor by acquiring the current value of the compressor and the current information in the temperature protection frequency reduction period when the temperature protection frequency reduction condition is triggered for more than or equal to two times and the interval time is less than the preset time, so that the compressor can maintain the current frequency or reduce the frequency to operate. In the embodiment of the invention, the current of the compressor and the frequency of the compressor have no hysteresis, and the frequency of the compressor can be timely adjusted, so that the frequency fluctuation of the compressor is reduced or avoided, and the use comfort is improved.
Drawings
Fig. 1 is a block diagram schematically illustrating a structure of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic block diagram of a flow of a frequency control method according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of the flow from step S611 to step S613 provided in the embodiment of the present invention;
fig. 4 is a schematic block diagram of a flow from step S700 to step S900 according to an embodiment of the present invention;
fig. 5 is a block diagram schematically illustrating a structure of a frequency control apparatus according to an embodiment of the present invention.
Icon: 100-an air conditioner; 10-frequency control means; 11-a first acquisition module; 12-a first judgment module; 13-a second acquisition module; 14-a second judgment module; 15-a third acquisition module; 16-a control module; and 20, a controller.
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.
Referring to fig. 1, an embodiment of the invention provides a frequency control device 10 of an air conditioner 100, which is applied to the air conditioner 100. The air conditioner 100 includes a frequency control device 10 and a controller 20. The frequency control device 10 of the air conditioner 100 includes at least one software function module that may be stored in the controller 20 in the form of software or firmware (firmware) or solidified in an Operating System (OS) of a server. The controller 20 is used to execute executable modules stored therein, such as software functional modules and computer programs included in the frequency control device 10 of the air conditioner 100.
The controller 20 may be an integrated circuit chip having signal processing capabilities. The controller 20 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), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor. The controller 20 may also be any conventional processor or the like.
The controller 20 is programmed with a frequency control program of the air conditioner 100, and when the controller 20 receives an execution instruction, the frequency control method of the air conditioner 100 is executed.
Referring to fig. 2, a method and an apparatus for controlling the frequency of the air conditioner 100 and a method for controlling the air conditioner 100 according to the embodiments of the present invention include the following steps.
Step S100: the number of times the air conditioner 100 triggers temperature protection down-conversion is obtained.
Step S200: it is determined whether the number of times the air conditioner 100 triggers temperature protection down-conversion obtained in step S100 is greater than or equal to two.
It should be noted that, when the air conditioner 100 is operated, sometimes it is in a relatively severe working condition, at this time, the indoor environment temperature does not reach the set temperature, and the compressor is required to increase the frequency to make the indoor temperature reach the set temperature more quickly. Meanwhile, due to the fact that the working condition is severe, when the air conditioner runs at high frequency, the load of the air conditioner is increased, the pressure is increased, the exhaust temperature is increased, the use reliability of the air conditioner is affected, and frequency reduction or frequency limiting protection needs to be set. When the load becomes high to a certain degree, the frequency is limited to rise, even the frequency is gradually reduced, and finally the air conditioner frequency is operated at the edge of the triggered frequency reduction, so that the refrigeration and heating capacity is maximized on the premise of ensuring the reliability. When frequency protection is carried out, the condition of frequent fluctuation of frequency exists, and the operation stability is influenced; meanwhile, frequency-raising and frequency-reducing noise exists, and the use comfort is influenced. In the embodiment of the present invention, the number of times that the air conditioner 100 triggers the temperature down protection is obtained, so as to determine whether the air conditioner 100 is in a frequency fluctuation state. The embodiment of the invention controls the frequency when the frequency is in a frequent fluctuation state, thereby enabling the air conditioner to run more stably and improving the use comfort.
Meanwhile, it should be noted that, in the embodiment of the present invention, the temperature protection down conversion triggered by the air conditioner 100 may be the same temperature protection down conversion condition. In step S200, the number of times may be recorded each time the temperature protection down-conversion is triggered, and when step S200 is executed, the number of times recorded may be read, so that the number of times of the temperature protection down-conversion may be directly obtained.
As for the judgment result of step S200: if the number of times that the air conditioner 100 triggers the temperature protection down conversion is greater than or equal to two times, executing step S300; if the number of times that the air conditioner 100 triggers the temperature protection down-conversion is less than two times, the process returns to continue to execute step S100.
Step S300: the interval time for triggering the temperature protection down-conversion of the air conditioner 100 is obtained.
It should be noted that, in step S300, the interval time for triggering the temperature protection down-conversion of the air conditioner 100 is obtained, and the interval time may reflect the frequency of triggering the temperature protection down-conversion. The shorter the interval time, the more frequent the air conditioner 100 triggers the temperature protection down-conversion, the higher the frequency, the larger the fluctuation, the more unstable the compressor is in operation, and the noise of the up-conversion and down-conversion is more easily generated. Meanwhile, it should also be noted that, in the embodiment of the present invention, when the number of times the air conditioner 100 triggers the temperature protection down conversion is two, in step S300, the acquired interval time for triggering the temperature protection down conversion is the time interval between the two times of triggering the temperature protection down conversion. In some embodiments, the number of times of the trigger temperature protection down conversion acquired in step S100 is greater than two times, such as three times. At this time, the time interval between the last two times of triggering temperature protection down conversion can be used as the time interval between the triggering temperature protection down conversion obtained in step S300; or, calculating the time interval of the trigger temperature protection down-conversion of any two adjacent times, and averaging to obtain the interval time of the trigger temperature protection down-conversion in step S300.
Step S400: and judging whether the interval time is less than or equal to the preset time.
It should be noted that, in the embodiment of the present invention, the above steps S100 to S400 are mainly used to determine whether the air conditioner 100 is in a frequent fluctuation state of the compressor frequency. In step S400, the preset time is a set time range, which may be 10min to 60min (min, time unit: minute), or other time ranges. The embodiments of the present invention are not specifically required or limited. Within the preset time, the air conditioner triggers the temperature protection frequency reduction to be more than or equal to twice, then the compressor of the air conditioner is considered to be in a frequency fluctuation state, at the moment, the frequency fluctuation of the compressor can cause the unstable operation of the compressor, and noise can be generated in frequent frequency increasing and frequency reducing processes to influence the use comfort of the air conditioner. Meanwhile, frequent frequency raising and lowering of the compressor also has an adverse effect on the life of the compressor.
As a result of the determination in step S400: if the interval time is less than or equal to the preset time, executing step S500; if the interval time is greater than the preset time, the process returns to step S100.
Step S500: the current value of the compressor of the air conditioner 100 and the current information of the compressor in the temperature protection down-conversion period are obtained. The temperature protection down-conversion period is the time period between two times of triggering of temperature down-conversion protection.
It is to be noted that, in the embodiment of the present invention, the current value of the compressor is used as a reference. At present, in the prior art, the protection frequency reduction is mostly controlled by adopting a temperature sensor, the temperature sensor has sampling hysteresis, and when the temperature triggers the frequency reduction condition, the frequency is overshot. This leads to frequent frequency fluctuation, influences the operating stability to bring the abnormal sound of raising and lowering frequency, influence the air conditioner and use the travelling comfort more. In the embodiment of the invention, the current value of the compressor is used as a frequency limiting or reducing parameter, the current has real-time performance, and the frequency of the compressor can be synchronously adjusted by using the current frequency limiting, so that frequent frequency fluctuation is reduced or avoided, the running stability is ensured, and the use comfort of the air conditioner is favorably improved. That is, in the embodiment of the present invention, the non-hysteresis of the current and the frequency can solve or avoid the problem of frequency fluctuation caused by temperature hysteresis. Step S600: and controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the current value of the compressor and the current information of the compressor in the temperature protection frequency reduction period.
It should be noted that the control of the compressor to maintain the current frequency operation or the down-frequency operation is mainly used to reduce or avoid frequent fluctuations of the frequency of the compressor. In the embodiment of the present invention, step S600 prohibits the frequency increasing of the compressor according to the current value and the current information of the compressor, which is beneficial to maintaining the frequency of the compressor at a stable level, thereby improving the comfort of use.
In an alternative embodiment, step S500 may include sub-step S510: acquiring a maximum current value and a minimum current value of the compressor in a temperature protection frequency reduction period; at this time, step S600 may include sub-step S610: and controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period and the current value of the compressor.
Referring to fig. 3, in an alternative embodiment, sub-step S610 may include sub-step S611, sub-step S612, and sub-step S613.
Substep S611: judging whether the current value of the compressor is greater than or equal to half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period or not; that is, the following determination may be performed in step S611:
wherein, ItIndicating the current value of the compressor, ImaxRepresents the maximum current value, I, during the temperature protection down-conversion periodminRepresenting the minimum current value during the temperature protection down-conversion period.
In sub-step S611, the maximum current value and the minimum current value in the temperature protection down-conversion period may be the maximum current value and the minimum current value in the last protection down-conversion period, or the maximum current value and the minimum current value in all protection down-conversion periods when performing the calculation this time.
In addition, it should be noted that in other embodiments of the present invention, other current values may be used for the determination, for example, a plurality of sets of current values are taken in a certain period, and an average value of the current values is calculated. Of course, other calculation methods are possible; the embodiments of the present invention are not specifically required or limited. The embodiment of the invention takes the current value as a reference, utilizes the real-time property of the current value, can realize the rapid adjustment of the frequency of the compressor, is beneficial to avoiding or reducing the frequency fluctuation of the compressor and improves the use comfort.
If the current value of the compressor is greater than or equal to half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection down-conversion period, the sub-step S612 is executed: and controlling the compressor to maintain the current frequency operation or the frequency reduction operation.
If the current value of the compressor is less than half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection down-conversion period, the sub-step S613 is executed: the frequency of the compressor is normally controlled.
Referring to fig. 4, in an alternative embodiment, in order to avoid that the cooling and heating effects are affected due to a low operating frequency possibly caused by a current frequency limiting function due to a good working condition, the control method of the present invention may further include the following steps.
Step S700: the duration of the air conditioner 100 not currently triggering protection down-conversion is obtained.
It should be noted that the duration of the protection down-conversion currently taken as the starting point by the air conditioner 100 refers to the duration of the air conditioner 100 not triggering the down-conversion protection, or the duration of the protection down-conversion from the last time the temperature was triggered.
Step S800: it is determined whether the duration of the air conditioner 100 not currently triggering protection down-conversion is greater than or equal to a preset exit time.
The judgment result of step S800: if the duration of the air conditioner 100 not currently triggering protection down-conversion is greater than or equal to the preset exit time, executing step S900; if the duration of the protection down-conversion currently not triggered by the air conditioner 100 is less than the preset exit time, the step S700 is continuously executed.
Step S900: and controlling the air conditioner 100 to exit the current limiting frequency.
It should be noted that, in the embodiment of the present invention, the air conditioner 100 exiting the current limiting refers to controlling the frequency of the compressor to maintain or decrease in the above step S600; in step S900, the air conditioner 100 is controlled to release the frequency limitation on the compressor, thereby ensuring the heating and cooling effects.
Optionally, the preset exit time ranges from 60min to 200min, such as 100min, 120min, and the like; of course, not limited thereto, the exit time may be set to other values in other embodiments of the invention.
The frequency control method of the air conditioner 100 provided by the embodiment of the invention comprises the following steps: according to the frequency control method, when the temperature protection frequency reduction condition triggered by the air conditioner 100 is more than or equal to two times and the interval time is less than the preset time, the current value of the compressor and the current information in the temperature protection frequency reduction period are obtained, the frequency of the compressor is limited, and the compressor can maintain the current frequency or reduce the frequency to operate. In the embodiment of the invention, the current of the compressor and the frequency of the compressor have no hysteresis, and the frequency of the compressor can be timely adjusted, so that the frequency fluctuation of the compressor is reduced or avoided, and the use comfort is improved.
Referring to fig. 5, the present invention provides a frequency control device 10 of an air conditioner 100, wherein the frequency control device 10 includes: the device comprises a first acquisition module 11, a first judgment module 12, a second acquisition module 13, a second judgment module 14, a third acquisition module 15 and a control module 16.
In the embodiment of the present invention, the first obtaining module 11 is configured to obtain the number of times that the air conditioner 100 triggers the temperature protection down conversion.
It should be noted that, in the embodiment of the present invention, the above step S100 is executed by the first obtaining module 11.
In the embodiment of the present invention, the first determining module 12 is configured to determine whether the number of times that the air conditioner 100 triggers the temperature protection down conversion is greater than or equal to two times.
It should be noted that, in the embodiment of the present invention, the step S200 is executed by the first determining module 12.
In the embodiment of the present invention, the second obtaining module 13 is configured to obtain the interval time for triggering the temperature protection down conversion by the air conditioner 100 if the number of times for triggering the temperature protection down conversion by the air conditioner 100 is greater than or equal to two times.
It should be noted that, in the embodiment of the present invention, the above step S300 is executed by the second obtaining module 13.
In the embodiment of the present invention, the second determining module 14 is configured to determine whether the interval time is less than or equal to a preset time.
It should be noted that, in the embodiment of the present invention, the step S400 is executed by the second determining module 14.
In the embodiment of the present invention, the third obtaining module 15 is configured to obtain a current value of the compressor of the air conditioner 100 and current information of the compressor in the temperature protection down-conversion period if the interval time is less than or equal to the preset time.
It should be noted that, in the embodiment of the present invention, the step S500 is executed by the third obtaining module 15.
In the embodiment of the present invention, the control module 16 is configured to control the compressor to maintain the current frequency operation or the down-conversion operation according to the current value of the compressor and the current information of the compressor during the temperature protection down-conversion period.
It should be noted that, in the embodiment of the present invention, the step S600 is executed by the control module 16.
In an alternative embodiment, the third obtaining module 15 is further configured to obtain a maximum current value and a minimum current value of the compressor during the temperature protection down-conversion period.
It should be noted that, in the embodiment of the present invention, the above sub-step S510 is performed by the third obtaining module 15.
In an alternative embodiment, the control module 16 is further configured to control the compressor to maintain the current frequency operation or the down-conversion operation according to the maximum current value and the minimum current value of the compressor during the temperature protection down-conversion period and the current value of the compressor.
It should be noted that, in the embodiment of the present invention, the sub-step S610 is executed by the control module 16.
In an alternative embodiment, the control module 16 is further configured to: judging whether the current value of the compressor is greater than or equal to half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period or not; and if the current value of the compressor is more than or equal to half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period, controlling the compressor to maintain the current frequency operation or frequency reduction operation. And if the current value of the compressor is less than half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period, normally controlling the frequency of the compressor.
It should be noted that, in the embodiment of the present invention, the sub-step S611 to the sub-step S613 are executed by the control module 16.
In an alternative embodiment, the control module 16 is further configured to: acquiring the duration of the current protection and frequency reduction of the air conditioner 100 which is not triggered; judging whether the duration of the current protection frequency reduction not triggered by the air conditioner 100 is greater than or equal to a preset exit time; and if the duration time of the air conditioner 100 which does not trigger the protection frequency reduction currently is longer than or equal to the preset exit time, controlling the air conditioner 100 to exit the current frequency limiting.
It should be noted that, in the embodiment of the present invention, the above steps S700 to S900 are executed by the control module 16.
The frequency control device 10 of the air conditioner 100 according to the embodiment of the present invention: when the air conditioner 100 triggers the temperature protection frequency reduction condition more than or equal to two times and the interval time is less than the preset time, the frequency control device 10 limits the frequency of the compressor by obtaining the current value of the compressor and the current information in the temperature protection frequency reduction period, so that the compressor maintains the current frequency or reduces the frequency to operate. In the embodiment of the invention, the current of the compressor and the frequency of the compressor have no hysteresis, and the frequency of the compressor can be timely adjusted, so that the frequency fluctuation of the compressor is reduced or avoided, and the use comfort is improved.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A frequency control method of an air conditioner, the control method comprising:
acquiring the frequency of triggering temperature protection and frequency reduction of the air conditioner;
judging whether the frequency of the air conditioner triggering temperature protection frequency reduction is more than or equal to two times;
if the frequency of triggering the temperature protection frequency reduction by the air conditioner is more than or equal to two times, acquiring the interval time of triggering the temperature protection frequency reduction by the air conditioner;
judging whether the interval time is less than or equal to a preset time or not;
if the interval time is less than or equal to the preset time, acquiring the current value of the compressor of the air conditioner and the current information of the compressor in the temperature protection frequency reduction period;
and controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the current value of the compressor and the current information of the compressor in the temperature protection frequency reduction period.
2. The frequency control method of an air conditioner according to claim 1, wherein the step of acquiring the current information of the compressor in the temperature protection down conversion period comprises:
acquiring a maximum current value and a minimum current value of the compressor in a temperature protection frequency reduction period;
the step of controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the current value of the compressor and the current information of the compressor in the temperature protection frequency reduction period comprises the following steps:
and controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period and the current value of the compressor.
3. The frequency control method of an air conditioner according to claim 2, wherein the step of controlling the compressor to maintain the current frequency operation or the down-conversion operation according to the maximum and minimum current values of the compressor during the temperature protection down-conversion period and the current value of the compressor comprises:
judging whether the current value of the compressor is larger than or equal to half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period or not;
and if the current value of the compressor is greater than or equal to half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period, controlling the compressor to maintain the current frequency operation or frequency reduction operation.
4. The frequency control method of an air conditioner according to claim 3, wherein the step of controlling the compressor to maintain the current frequency operation or the down-conversion operation according to the maximum current value and the minimum current value of the compressor during the temperature protection down-conversion period and the current value of the compressor further comprises:
and if the current value of the compressor is less than half of the sum of the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period, normally controlling the frequency of the compressor.
5. The frequency control method of an air conditioner according to any one of claims 1 to 4, wherein the preset time is in a range of 10min to 60 min.
6. The frequency control method of an air conditioner according to claim 1, wherein the control method further comprises:
acquiring the duration of the current protection and frequency reduction of the air conditioner without triggering;
judging whether the duration of the current protection frequency reduction not triggered by the air conditioner is greater than or equal to a preset exit time or not;
and if the duration time of the current air conditioner which does not trigger the protection frequency reduction is longer than or equal to the preset exit time, controlling the air conditioner to exit the current frequency limitation.
7. The frequency control method of an air conditioner according to claim 6, wherein the preset exit time ranges from 60min to 200 min.
8. A frequency control apparatus of an air conditioner, characterized in that the frequency control apparatus comprises:
a first obtaining module: the frequency acquisition module is used for acquiring the frequency of triggering temperature protection and frequency reduction of the air conditioner;
a first judgment module: the frequency control device is used for judging whether the frequency of the air conditioner triggering temperature protection frequency reduction is more than or equal to two times;
a second obtaining module: the time interval for triggering the temperature protection frequency reduction by the air conditioner is obtained if the frequency of triggering the temperature protection frequency reduction by the air conditioner is more than or equal to two times;
a second judging module: the time interval judging module is used for judging whether the time interval is less than or equal to a preset time or not;
a third obtaining module: the current value of the compressor of the air conditioner and the current information of the compressor in the temperature protection frequency reduction period are obtained if the interval time is less than or equal to the preset time;
a control module: and the controller is used for controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the current value of the compressor and the current information of the compressor in the temperature protection frequency reduction period.
9. The frequency control device of an air conditioner according to claim 8, wherein the third obtaining module is further configured to: acquiring a maximum current value and a minimum current value of the compressor in a temperature protection frequency reduction period;
the control module is further configured to: and controlling the compressor to maintain the current frequency operation or the frequency reduction operation according to the maximum current value and the minimum current value of the compressor in the temperature protection frequency reduction period and the current value of the compressor.
10. An air conditioner comprising a controller having stored thereon an operable frequency control program which, when read and executed, implements a control method as claimed in any one of claims 1 to 7.
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| CN113701304B (en) * | 2021-07-27 | 2022-10-28 | 宁波奥克斯电气股份有限公司 | Control method and device of air conditioner and air conditioner |
| CN114110911A (en) * | 2021-10-19 | 2022-03-01 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and air conditioner |
| CN114017894B (en) * | 2021-11-26 | 2023-03-31 | 宁波奥克斯电气股份有限公司 | Frequency control method and device and air conditioner |
| CN114234383B (en) * | 2021-12-21 | 2023-08-08 | 北京小米移动软件有限公司 | Air conditioner control method and device |
| CN115373443B (en) * | 2022-08-26 | 2024-04-05 | 深圳市广通远驰科技有限公司 | Temperature control method, device, electronic equipment and storage medium |
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| KR20170016727A (en) * | 2015-08-04 | 2017-02-14 | 엘지전자 주식회사 | Method for controlling of air conditioner |
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