CN108444079B - Air conditioner, control method thereof, and computer-readable storage medium - Google Patents
Air conditioner, control method thereof, and computer-readable storage medium Download PDFInfo
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- CN108444079B CN108444079B CN201810245208.8A CN201810245208A CN108444079B CN 108444079 B CN108444079 B CN 108444079B CN 201810245208 A CN201810245208 A CN 201810245208A CN 108444079 B CN108444079 B CN 108444079B
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Abstract
The invention discloses a control method of an air conditioner, which comprises the following steps: when the air conditioner is in a heating mode, acquiring the outdoor temperature in real time or at regular time; when the outdoor temperature meets the low-temperature heating condition, the current of the compressor is obtained in real time or at regular time; and adjusting the opening degree of the electronic expansion valve according to the current so as to increase the heating capacity of the air conditioner. The invention also discloses an air conditioner and a computer readable storage medium. The invention ensures the low-temperature heating effect of the air conditioner.
Description
Technical Field
The present invention relates to the field of air conditioners, and in particular, to an air conditioner, a control method thereof, and a computer-readable storage medium.
Background
With the improvement of living standard of people, the variable frequency air conditioner becomes an essential electric appliance in the generation of people.
When the inverter air conditioner heats, the inverter air conditioner needs to obtain heat from the outside simultaneously so as to meet the heating requirement of a user, but when the outdoor temperature is lower, the inverter air conditioner obtains less heat from the outside, so that the inverter air conditioner cannot meet the heating requirement of the user, and the low-temperature heating effect of the air conditioner is poor.
Disclosure of Invention
The invention mainly aims to provide an air conditioner, a control method thereof and a computer readable storage medium, and aims to solve the problem of poor low-temperature heating effect of the air conditioner.
In order to achieve the above object, the present invention provides a method for controlling an air conditioner, comprising:
when the air conditioner is in a heating mode, acquiring the outdoor temperature in real time or at regular time;
when the outdoor temperature meets the low-temperature heating condition, the current of the compressor is obtained in real time or at regular time;
and adjusting the opening degree of the electronic expansion valve according to the current so as to increase the heating capacity of the air conditioner.
Preferably, the step of adjusting the opening degree of the electronic expansion valve according to the current comprises:
obtaining the protection current of the compressor, and calculating the current difference value between the protection current and the current;
and determining an opening degree adjustment value of the electronic expansion valve according to the current difference value, and adjusting the opening degree of the electronic expansion valve according to the opening degree adjustment value.
Preferably, after the step of determining the opening degree adjustment value of the electronic expansion valve according to the current difference, the method further includes:
determining a first operation frequency adjustment value of the compressor according to the opening adjustment value;
and adjusting the operating frequency of the compressor according to the first operating frequency adjusting value.
Preferably, after the step of calculating the current difference between the protection current and the present current, the method further includes:
determining a second operating frequency adjustment value of the compressor according to the current difference value;
and adjusting the operating frequency of the compressor according to the second operating frequency adjusting value.
Preferably, after the step of adjusting the operating frequency of the compressor according to the operating frequency adjustment value, the method further includes:
obtaining a preset current, and comparing the current, the preset current and the protection current, wherein the preset current is smaller than the protection current;
and when the current is smaller than the preset current, acquiring an operation frequency increase value, and increasing the operation frequency of the compressor according to the operation frequency increase value.
Preferably, after the step of comparing the current, the preset current and the protection current, the method further includes:
and when the current is greater than the protection current, acquiring an operation frequency reduction value, and reducing the operation frequency of the compressor according to the operation frequency reduction value.
Preferably, after the step of adjusting the operating frequency of the compressor according to the operating frequency adjustment value, the method further includes:
acquiring the outlet temperature of the flash evaporator and the temperature of the air supplementing port, and calculating the temperature difference between the outlet temperature and the temperature of the air supplementing port;
and when the temperature difference value is larger than a first preset difference value, determining an operation frequency reduction value of the compressor according to the temperature difference value, and adjusting the operation frequency of the compressor according to the operation frequency reduction value.
Preferably, the step of acquiring the current of the compressor in real time or at regular time when the outdoor temperature meets the low-temperature heating condition includes:
and when the outdoor temperature is lower than a preset temperature or the temperature difference between the outdoor temperature and the set temperature of the air conditioner is lower than a second preset difference, judging that the outdoor temperature meets a low-temperature heating condition, and acquiring the current of the compressor in real time or at regular time.
In order to achieve the above object, the present invention further provides an air conditioner, which includes a processor, a memory, and a control program of the air conditioner stored on the memory and operable on the processor, wherein the control program of the air conditioner, when executed by the processor, implements the steps of the control method of the air conditioner as described above.
To achieve the above object, the present invention also provides a computer-readable storage medium storing a control program of an air conditioner, which when executed by a processor, implements the steps of the control method of the air conditioner as described above.
According to the air conditioner, the control method and the computer readable storage medium provided by the invention, when the air conditioner is in a heating mode, the outdoor temperature is obtained, when the indoor temperature meets a low-temperature heating condition, the current of the compressor is obtained in real time or at regular time, and then the opening degree of the electronic expansion valve is adjusted according to the current, so that the heating capacity of the air conditioner is increased, the heating requirement of a user is met, and the low-temperature heating effect of the air conditioner is ensured.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a control method of an air conditioner according to a first embodiment of the present invention;
FIG. 3 is a flow chart illustrating a control method of an air conditioner according to a second embodiment of the present invention;
FIG. 4 is a flow chart illustrating a control method of an air conditioner according to a third embodiment of the present invention;
FIG. 5 is a flow chart illustrating a fourth embodiment of a method for controlling an air conditioner according to the present invention;
FIG. 6 is a flow chart illustrating a fifth embodiment of a method for controlling an air conditioner according to the present invention;
fig. 7 is a flowchart illustrating a control method of an air conditioner according to a sixth embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: when the air conditioner is in a heating mode, acquiring outdoor temperature; when the outdoor temperature meets the low-temperature heating condition, the current of the compressor is obtained in real time or at regular time; and adjusting the opening degree of the electronic expansion valve according to the current so as to increase the heating capacity of the air conditioner.
In the prior art, when the inverter air conditioner heats, the inverter air conditioner needs to obtain heat from the outside to meet the heating requirement of a user, but when the outdoor temperature is low, the inverter air conditioner obtains less heat from the outside, so that the inverter air conditioner cannot meet the heating requirement of the user, and the low-temperature heating effect of the air conditioner is poor.
The present invention provides a solution: the air conditioner can adjust the opening of the electronic expansion valve by the current of the compressor, so that the heating capacity of the air conditioner is increased, the heating requirement of a user is met, and the low-temperature heating effect of the air conditioner is guaranteed.
As one implementation, the air conditioner may be as shown in fig. 1.
The embodiment of the invention relates to an air conditioner, which comprises: a processor 1001, such as a CPU, a memory 1002, and a communication bus 1003. The communication bus 1003 is used to implement connection communication among these components.
The memory 1002 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). As shown in fig. 1, a control program of an air conditioner may be included in the memory 1003 as one type of computer storage medium; and the processor 1001 may be configured to call a control program of the air conditioner stored in the memory 1002 and perform the following operations:
when the air conditioner is in a heating mode, acquiring the outdoor temperature in real time or at regular time;
when the outdoor temperature meets the low-temperature heating condition, the current of the compressor is obtained in real time or at regular time;
and adjusting the opening degree of the electronic expansion valve according to the current so as to increase the heating capacity of the air conditioner.
Further, the processor 1001 may be configured to call a control program of the air conditioner stored in the memory 1002, and perform the following operations:
obtaining the protection current of the compressor, and calculating the current difference value between the protection current and the current;
and determining an opening degree adjustment value of the electronic expansion valve according to the current difference value, and adjusting the opening degree of the electronic expansion valve according to the opening degree adjustment value.
Further, the processor 1001 may be configured to call a control program of the air conditioner stored in the memory 1002, and perform the following operations:
determining a first operation frequency adjustment value of the compressor according to the opening adjustment value;
and adjusting the operating frequency of the compressor according to the first operating frequency adjusting value.
Further, the processor 1001 may be configured to call a control program of the air conditioner stored in the memory 1002, and perform the following operations:
determining a second operating frequency adjustment value of the compressor according to the current difference value;
and adjusting the operating frequency of the compressor according to the second operating frequency adjusting value.
Further, the processor 1001 may be configured to call a control program of the air conditioner stored in the memory 1002, and perform the following operations:
obtaining a preset current, and comparing the current, the preset current and the protection current, wherein the preset current is smaller than the protection current;
when the current is smaller than the preset current, acquiring an operation frequency increase value, and increasing the operation frequency of the compressor according to the operation frequency increase value;
further, the processor 1001 may be configured to call a control program of the air conditioner stored in the memory 1002, and perform the following operations:
and when the current is greater than the protection current, acquiring an operation frequency reduction value, and reducing the operation frequency of the compressor according to the operation frequency reduction value.
Further, the processor 1001 may be configured to call a control program of the air conditioner stored in the memory 1002, and perform the following operations:
acquiring the outlet temperature of the flash evaporator and the temperature of the air supplementing port, and calculating the temperature difference between the outlet temperature and the temperature of the air supplementing port;
and when the temperature difference value is larger than a first preset difference value, determining an operation frequency reduction value of the compressor according to the temperature difference value, and adjusting the operation frequency of the compressor according to the operation frequency reduction value.
Further, the processor 1001 may be configured to call a control program of the air conditioner stored in the memory 1002, and perform the following operations:
and when the outdoor temperature is lower than a preset temperature or the temperature difference between the outdoor temperature and the set temperature of the air conditioner is lower than a second preset difference, judging that the outdoor temperature meets a low-temperature heating condition, and acquiring the current of the compressor in real time or at regular time.
According to the scheme, when the air conditioner is in the heating mode, the outdoor temperature is acquired, when the indoor temperature meets the low-temperature heating condition, the current of the compressor is acquired in real time or at regular time, and the opening of the electronic expansion valve is adjusted according to the current, so that the heating capacity of the air conditioner is increased, the heating requirement of a user is met, and the low-temperature heating effect of the air conditioner is guaranteed.
Based on the hardware architecture, the embodiment of the control method of the air conditioner is provided.
Referring to fig. 2, fig. 2 is a first embodiment of a control method of an air conditioner according to the present invention, the control method of the air conditioner including the steps of:
step S10, when the air conditioner is in heating mode, the outdoor temperature is obtained in real time or at regular time;
in the present invention, the air conditioner refers to an air conditioner having an inverter compressor. When the air conditioner heats, a temperature sensor in an outdoor unit of the air conditioner can detect the outdoor temperature in real time or at regular time, or the air conditioner can directly acquire the current outdoor temperature from a server.
Step S20, when the outdoor temperature meets the low-temperature heating condition, the current of the compressor is obtained in real time or at regular time;
the air conditioner is provided with a low-temperature heating mode based on the fact that the air conditioner needs to obtain heat from the outside when heating, the heat obtained from the outside is small when the outdoor temperature is low, and the heating quantity of the air conditioner in the existing heating mode cannot meet the heating requirement of a user when the heating requirement of the user is high. The triggering condition may also be set based on the heating requirement of the user, for example, when the temperature difference between the heating temperature set by the user and the outdoor temperature (in this embodiment, the outdoor temperature is considered to be the same as the indoor temperature) is greater than a preset difference (a first preset difference, which may be any suitable value, such as 20 ℃), the air conditioner determines that the heating requirement of the user is high, that is, the triggering condition is satisfied. It is understood that the low temperature heating condition is that the outdoor temperature is lower than the preset temperature, or that a temperature difference between the outdoor temperature and the set temperature of the air conditioner is lower than a preset difference.
When the air conditioner judges that the outdoor temperature meets the low-temperature heating condition, the current of the compressor can be obtained in real time or at regular time, and therefore the opening degree of the electronic expansion valve is adjusted according to the current
Step S30, adjusting the opening of the electronic expansion valve according to the current to increase the heating capacity of the air conditioner;
when the air conditioner judges that the outdoor temperature meets the low-temperature heating condition, the current of the compressor can be acquired in real time or at regular time, so that the opening degree of the electronic expansion valve is adjusted according to the current, specifically, under the low-temperature heating mode, the current of the compressor and the opening degree of the electronic expansion valve have a mapping relation, the air conditioner only needs to determine the opening degree of the electronic expansion valve according to the current of the compressor, the electronic expansion valve is controlled to adjust the refrigerant output quantity of the indoor heat exchanger according to the determined opening degree, the heating quantity of the indoor heat exchanger in unit time is increased, and the heating requirement of a user is met.
In the technical scheme provided by the embodiment, when the air conditioner is in a heating mode, the outdoor temperature is acquired, when the indoor temperature meets a low-temperature heating condition, the current of the compressor is acquired in real time or at regular time, and then the opening degree of the electronic expansion valve is adjusted according to the current, so that the heating capacity of the air conditioner is increased, the heating requirement of a user is met, and the low-temperature heating effect of the air conditioner is ensured.
Referring to fig. 3, fig. 3 is a second embodiment of the control method of the air conditioner according to the present invention, and based on the first embodiment, the step S30 includes:
step S31, obtaining the protection current of the compressor, and calculating the current difference between the protection current and the current;
step S32, determining an opening degree adjustment value of the electronic expansion valve according to the current difference value, and adjusting the opening degree of the electronic expansion valve according to the opening degree adjustment value;
the compressor has a protection current at which the compressor does not work in overload. The air conditioner may adjust the opening degree of the electronic expansion valve according to the current and the protection current of the compressor, and it should be noted that the electronic expansion valve is located on the refrigerant output pipeline of the indoor heat exchanger, that is, the air conditioner controls the opening degree of the electronic expansion valve located on the refrigerant output pipeline of the indoor heat exchanger.
The air conditioner stores a mapping relation between a current difference value between a protection current of a compressor and a current and an opening degree adjustment value of an electronic expansion valve, and determines an opening degree adjustment value according to the mapping relation and the current difference value, so that the air conditioner adjusts the opening degree of the electronic expansion valve according to the opening degree adjustment value, a corresponding formula is provided between the opening degree of the electronic expansion valve and the adjusted opening degree, and the work formula is PLS (N +1) ═ PLS (N) + N, wherein PLS (N) is the current opening degree of the electronic expansion valve, PLS (N +1) is the adjusted opening degree of the electronic expansion valve, N is an opening degree adjustment value, specifically, PLS (N) is 480, that is, the initial opening degree of the electronic expansion valve is 480, N is a negative number, and that is, the opening degree adjustment value is actually an opening degree reduction value. The larger the current difference is, the larger the opening degree adjustment range of the electronic expansion valve is.
Further, the lower the outdoor temperature is, the higher the heating demand of the air conditioner by the user is, that is, the outdoor temperature affects the opening degree adjustment range of the electronic expansion valve, and when the indoor temperature is lower, the opening degree adjustment range is higher, based on which the air conditioner sets the mapping relationship between the opening degree adjustment values and the current difference values at a plurality of outdoor temperatures, thereby determining the mapping relationship based on the outdoor temperature.
In the technical scheme provided by this embodiment, the air conditioner determines the opening degree of the electronic expansion valve according to the current and the protection current of the compressor, so that the air conditioner can adjust the opening degree of the electronic expansion valve to the maximum extent according to the actual situation, thereby increasing the heating capacity of the air conditioner to the maximum extent and improving the user experience.
Referring to fig. 4, fig. 4 is a third embodiment of the control method of the air conditioner according to the present invention, and based on the second embodiment, after step S31, the method further includes:
step S33, determining a first operation frequency adjusting value of the compressor according to the opening degree adjusting value;
step S34, adjusting the operating frequency of the compressor according to the first operating frequency adjustment value;
in this embodiment, the air conditioner may determine an operation frequency adjustment value of the compressor according to an opening adjustment value of the electronic expansion valve, specifically, a mapping relationship between the opening adjustment value and the operation frequency adjustment value is stored in the air conditioner, after the opening adjustment value is obtained, the air conditioner may directly obtain the operation frequency adjustment value according to the mapping relationship, and when the opening adjustment value is larger, the operation frequency adjustment value is also larger, so that the air conditioner adjusts the operation frequency of the compressor according to the operation frequency adjustment value, that is, the operation frequency of the compressor is increased, thereby increasing the refrigerant output amount of the compressor per unit time, and increasing the heating capacity of the air conditioner.
In the technical solution improved in this embodiment, the air conditioner determines the operation frequency adjustment value of the compressor according to the opening adjustment value of the electronic expansion valve, so that the air conditioner adjusts the operation frequency of the compressor while adjusting the opening of the electronic expansion valve, thereby further increasing the heating capacity of the air conditioner.
Referring to fig. 5, fig. 5 shows a fourth embodiment of the method for controlling an air conditioner according to the present invention, and based on the second embodiment, after step S31, the method further includes:
step S35, determining a second operation frequency adjusting value of the compressor according to the current difference value;
step S36, adjusting the operating frequency of the compressor according to the second operating frequency adjustment value;
the compressor has a protection current at which the compressor does not work in overload. The air conditioner can adjust its operation frequency according to the present current of the compressor and the protection current.
The air conditioner stores a current difference value between a protection current of a compressor and a current and a mapping relation of an operation frequency adjustment value, and determines an operation frequency adjustment value according to the mapping relation and the current difference value, so that the air conditioner adjusts the operation frequency of the compressor according to the operation frequency adjustment value, a corresponding formula is provided between the current operation frequency of the compressor and the adjusted operation frequency, and the work formula is f (n +1) ═ f (n) + X, wherein f (n) is the current operation frequency of the compressor, f (n +1) is the adjusted operation frequency, X is the operation frequency adjustment value, and the operation frequency adjustment value is a positive number, namely the adjusted operation frequency is higher than the current operation frequency, and X can be any suitable value.
The operation frequency of the compressor and the opening degree of the electronic expansion valve may be adjusted simultaneously or sequentially, and the order of execution of steps S35 to S36 and S32 is not limited in the present invention.
In the technical scheme provided by the embodiment, the air conditioner determines the operating frequency of the compressor according to the current and the protection current of the compressor, so that the air conditioner can adjust the operating frequency of the compressor to the maximum extent according to the actual situation, the heating capacity of the air conditioner is increased to the maximum extent, and the user experience is improved.
Referring to fig. 6, fig. 6 is a fifth embodiment of the method for controlling an air conditioner according to the present invention, and based on the third or fourth embodiment, the method for controlling an air conditioner further includes:
step S40, obtaining a preset current, and comparing the current, the preset current and the protection current, wherein the preset current is smaller than the protection current;
step S50, when the current is smaller than the preset current, obtaining an operation frequency increase value, and increasing the operation frequency of the compressor according to the operation frequency increase value;
step S60, when the current is larger than the protection current, obtaining an operation frequency reduction value, and reducing the operation frequency of the compressor according to the operation frequency reduction value;
when the air conditioner is in the low-temperature heating mode, in order to maximize the heating capacity of the air conditioner, the operating frequency of the compressor needs to be increased as much as possible, and the operating frequency of the compressor is related to the current of the compressor, the higher the operating frequency is, the larger the current of the compressor is, and in order to ensure that the compressor does not run in an overload mode, the current of the compressor should not be greater than the protection current, and it can be understood that the air conditioner needs to ensure that the current thereof is slightly smaller than the protection current while maximizing the operating frequency of the compressor. Based on the method, the air conditioner sets a preset current (the preset current is slightly smaller than the protection current, namely the difference value between the preset current and the protection current is small, and the difference value can be 0.5A), and when the current of the compressor is between the preset current and the protection current, the current of the compressor is judged to be slightly smaller than the protection current, so that the running frequency of the compressor is improved to the maximum extent.
After the air conditioner adjusts the operating frequency of the compressor for the first time, the air conditioner compares the current, the preset current and the protection current, when the current is smaller than the preset current, the operating frequency of the air conditioner has an improved space, and the air conditioner can acquire a preset operating frequency increasing value to increase the operating frequency of the compressor; when the current is greater than the protection current, at the moment, the compressor is in overload operation, namely the running frequency of the first adjusted compressor is too high, the running frequency of the compressor needs to be reduced, and the air conditioner acquires a running frequency reduction value to reduce the running frequency of the compressor.
In the technical scheme provided by this embodiment, the air conditioner further adjusts the operating frequency of the compressor according to the result of the ratio of the current, the preset current and the protection current, so that the operating frequency of the compressor is increased to the maximum extent under the condition that the compressor does not work under overload, and the heating capacity of the air conditioner is increased to the maximum extent.
Referring to fig. 7, fig. 7 is a sixth embodiment of a control method of an air conditioner according to the present invention, and based on the third to fifth embodiments, the control method of the air conditioner further includes:
step S70, acquiring the outlet temperature of the flash evaporator and the temperature of the air supplementing port, and calculating the temperature difference between the outlet temperature and the temperature of the air supplementing port;
step S80, when the temperature difference is larger than a first preset difference, determining an operation frequency reduction value of the compressor according to the temperature difference, and adjusting the operation frequency of the compressor according to the operation frequency reduction value;
in this embodiment, the air conditioner is a turn-on-break air conditioner for increasing air, and the air conditioner is provided with a flash evaporator, the flash evaporator is located between an indoor heat exchanger (condenser) and an outdoor heat exchanger (evaporator), an outlet of the flash evaporator is connected with a refrigerant inlet of the evaporator through a pipeline, and an outlet of the flash evaporator is connected with a refrigerant outlet of the condenser through a pipeline. In the heating mode of the air conditioner, the compressor inputs high-temperature and high-pressure gas into the condenser, the condenser condenses the refrigerant gas into liquid, the liquid refrigerant enters the flash evaporator and then becomes gas, part of the gas is directly input into the compressor from the gas supplementing port of the flash evaporator, and part of the gas is directly input into the evaporator to further heat the gas refrigerant. When the outlet temperature of the flash evaporator is lower than the temperature of the air supplementing port, the refrigerant output by the flash evaporator contains both liquid and gas, so that the heat consumed by the evaporator for heating low-temperature gas into high-temperature gas is less than the heat consumed by heating liquid into high-temperature gas, and at the moment, the heating efficiency of the air conditioner is reduced, namely, the heating capacity of the air conditioner is reduced. When the operating frequency of the compressor is too high, the transmission rate of the refrigerant is high, so that part of liquid refrigerant is not evaporated by the flash evaporator, the outlet temperature of the flash evaporator is lower than the temperature of the air supplementing port, and the heating effect of the air conditioner is poor. Based on the above, after the operation frequency of the compressor is adjusted, the air conditioner obtains the outlet temperature of the flash evaporator and the temperature of the air supplementing port, when the outlet temperature is smaller than the temperature of the air supplementing port, the operation frequency reducing value of the compressor is obtained to reduce the operation frequency of the compressor, furthermore, when the outlet temperature is smaller than the temperature of the air supplementing port, the temperature difference value is calculated, and if the temperature difference value is larger than the preset difference value, the air port is judged to output liquid refrigerant, so that the operation frequency of the compressor is controlled to be reduced.
In the technical scheme provided by this embodiment, after the air conditioner adjusts the operating frequency of the compressor, it is determined whether the adjusted operating frequency affects the evaporation efficiency of the flash evaporator on the liquid refrigerant, so as to reasonably control the operating frequency of the compressor and ensure the heating effect of the air conditioner.
The invention also provides an air conditioner, which comprises a processor, a memory and a control program of the air conditioner, wherein the control program of the air conditioner is stored on the memory and can run on the processor, and the control program of the air conditioner realizes the steps of the control method of the air conditioner according to the embodiment when being executed by the processor.
The present invention also provides a computer-readable storage medium storing a control program of an air conditioner, which when executed by a processor, implements the steps of the control method of the air conditioner as described in the above embodiments.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It should be noted that, in this document, 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 like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. 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 (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A control method of an air conditioner is characterized by comprising the following steps:
when the air conditioner is in a heating mode, acquiring the outdoor temperature in real time or at regular time;
when the outdoor temperature meets the low-temperature heating condition, the current of the compressor is obtained in real time or at regular time;
obtaining the protection current of the compressor, and calculating the current difference value between the protection current and the current;
determining an opening degree adjustment value of the electronic expansion valve according to the current difference value, adjusting the opening degree of the electronic expansion valve according to the opening degree adjustment value, wherein the opening degree adjustment value has a mapping relation with the operation frequency of the compressor, determining a first operation frequency adjustment value of the compressor according to the opening degree adjustment value, and the opening degree adjustment value of the electronic expansion valve is an opening degree reduction value; adjusting the operating frequency of the compressor according to the first operating frequency adjustment value, wherein the larger the opening degree adjustment value is, the larger the operating frequency value of the compressor is, so as to increase the heating capacity of the air conditioner;
determining a second operating frequency adjustment value of the compressor according to the current difference value;
adjusting the operating frequency of the compressor according to the second operating frequency adjustment value; obtaining a preset current, and comparing the current, the preset current and the protection current, wherein the preset current is smaller than the protection current;
and when the current is smaller than the preset current, acquiring an operation frequency increase value, and increasing the operation frequency of the compressor according to the operation frequency increase value.
2. The method for controlling an air conditioner according to claim 1, wherein the step of comparing the present current, the preset current and the protection current further comprises:
and when the current is greater than the protection current, acquiring an operation frequency reduction value, and reducing the operation frequency of the compressor according to the operation frequency reduction value.
3. The control method of an air conditioner according to claim 1, further comprising, after the step of adjusting the operating frequency of the compressor according to the operating frequency adjustment value:
acquiring the outlet temperature of the flash evaporator and the temperature of the air supplementing port, and calculating the temperature difference between the outlet temperature and the temperature of the air supplementing port;
and when the temperature difference is greater than a first preset difference and the outlet temperature is less than the temperature of the air supplementing port, determining the operating frequency reduction value of the compressor according to the temperature difference, and adjusting the operating frequency of the compressor according to the operating frequency reduction value.
4. The control method of an air conditioner according to claim 1, wherein the step of acquiring a current of a compressor in real time or at regular time when the outdoor temperature satisfies a low temperature heating condition comprises:
and when the outdoor temperature is lower than a preset temperature or the temperature difference between the outdoor temperature and the set temperature of the air conditioner is lower than a second preset difference, judging that the outdoor temperature meets a low-temperature heating condition, and acquiring the current of the compressor in real time or at regular time.
5. An air conditioner, characterized in that the air conditioner comprises a processor, a memory, and a control program of the air conditioner stored on the memory and executable on the processor, the control program of the air conditioner implementing the steps of the control method of the air conditioner according to any one of claims 1 to 4 when executed by the processor.
6. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a control program of an air conditioner, which when executed by a processor, implements the steps of the control method of the air conditioner according to any one of claims 1 to 4.
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| CN112665112B (en) * | 2019-10-16 | 2022-04-05 | 广东美的制冷设备有限公司 | Air conditioner, control method thereof and readable storage medium |
| CN112856743B (en) * | 2019-11-28 | 2022-09-16 | 广东美的制冷设备有限公司 | Air conditioner, method of controlling the same, and computer storage medium |
| CN113834205B (en) * | 2020-06-24 | 2022-09-27 | 广东美的制冷设备有限公司 | Control method for heating of compressor winding, air conditioner and storage medium |
| CN113739350B (en) * | 2021-09-23 | 2022-05-03 | 宁波奥克斯电气股份有限公司 | Low-temperature heating frequency conversion control method and device, storage medium and air conditioner |
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