CN108444140B - Air conditioner, method of controlling the same, and computer-readable storage medium - Google Patents
Air conditioner, method of controlling the same, and computer-readable storage medium Download PDFInfo
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- CN108444140B CN108444140B CN201810436281.3A CN201810436281A CN108444140B CN 108444140 B CN108444140 B CN 108444140B CN 201810436281 A CN201810436281 A CN 201810436281A CN 108444140 B CN108444140 B CN 108444140B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/04—Clogging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/16—Lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
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Abstract
The invention discloses a control method of an air conditioner, which comprises the following steps: after defrosting is finished, detecting the air suction pressure value at the air suction port of the compressor of the air conditioner; judging whether the suction pressure value at the suction port of the compressor is less than or equal to a preset pressure value or not; and when the suction pressure value at the suction port of the compressor is less than or equal to the preset pressure value, reducing the operating frequency of the compressor. The invention also discloses an air conditioner and a computer readable storage medium. According to the embodiment of the invention, after defrosting is finished, whether the air suction pressure value is less than or equal to the preset pressure value is judged by detecting the air suction pressure value at the air suction port of the compressor of the air conditioner, if the air suction pressure value is less than or equal to the preset pressure value, the running frequency of the compressor is reduced, the temperature of the refrigerant in the outdoor heat exchanger is increased, the situation that the refrigerant blocks a throttling device of the air conditioner statically and cannot participate in circulation is avoided, the air conditioner is high in use comfort, and the service life of the compressor is long.
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
At present, in the technical field of air-conditioning refrigeration, R410a refrigerant is mostly used to replace R22, and the advantages of the refrigerant are obviously reflected in the frequency conversion air-conditioner, but because the GWP value of the R410a refrigerant is higher (2200), the refrigerant will be gradually eliminated under the background that the global warming effect is increasingly serious and the world countries pay more attention to global climate change. Therefore, at present, research on low GWP refrigerants represented by R32 and R290 is more focused, and at the same time, development of corresponding compressors is underway. Among them, compressor oil is also receiving increasing attention as an indispensable component of an air conditioning system.
Lubricating oil in the compressor of the air conditioner is extremely important to the normal operation of the system, the lubricating oil plays a role in lubricating, sealing and cooling the air cylinder and the rotor, if the lubricating oil is insufficient, the abrasion between the air cylinder and the rotor of the compressor is increased, the internal temperature is overhigh, the motor is finally burnt, the system is crashed, and particularly, the lubricating oil is particularly important for novel combustible refrigerants. If the oil return is not smooth due to some reason, the problems of insufficient lubricating oil of the compressor, idling heating of the motor and the like can be caused, so that the lubricating oil can normally return to the compressor and the heat of the motor is timely discharged in the design of the system.
However, for the flammable refrigerant, the phenomenon of blockage of the throttling device can occur under the low-temperature defrosting condition of the existing system, so that the refrigerant cannot participate in circulation, the compressor idles, and the motor of the compressor is excessively heated and burnt after long-time operation, so that the service lives of the compressor and the system are greatly reduced, the use experience of a user is influenced, and meanwhile, the occurrence of the problem also causes great influence on the design of an air conditioning system of the flammable refrigerant.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
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 technical problems that a refrigerant cannot participate in circulation, a compressor idles, a compressor motor is excessively heated and burnt after long-time operation, and the service lives of the compressor and a system are greatly shortened due to the fact that a throttling device is blocked under the working condition of low-temperature defrosting of the conventional air conditioner.
In order to achieve the above object, an aspect of the present invention provides a control method of an air conditioner, including the steps of:
after defrosting is finished, detecting the air suction pressure value at the air suction port of the compressor of the air conditioner;
judging whether the suction pressure value at the suction port of the compressor is less than or equal to a preset pressure value or not;
and when the suction pressure value at the suction port of the compressor is less than or equal to the preset pressure value, reducing the operating frequency of the compressor.
Preferably, the control method of the air conditioner further includes:
and after defrosting is finished and a first time interval is preset, executing the step of detecting the suction pressure value at the suction port of the compressor of the air conditioner.
Preferably, after the step of reducing the operating frequency of the compressor, the control method of the air conditioner further includes:
after a second time interval is preset, continuously detecting the current suction pressure value at the suction port of the compressor of the air conditioner,
judging whether the current suction pressure value at the suction port of the compressor is greater than the preset pressure value or not;
and when the current air suction pressure value at the air suction port of the compressor is greater than the preset pressure value, recovering the operating frequency of the compressor.
Preferably, after the step of reducing the operating frequency of the compressor, the control method of the air conditioner further includes:
when the current air suction pressure value at the air suction port of the compressor is smaller than or equal to the preset pressure value, acquiring a current operation frequency value of the compressor;
judging whether the current operating frequency value is greater than a preset operating frequency value or not;
when the current operation frequency value is larger than the preset operation frequency value, returning to the step of reducing the operation frequency of the compressor;
preferably, after the step of reducing the operating frequency of the compressor, the control method of the air conditioner further includes:
and when the current operation frequency value is less than or equal to the preset operation frequency value, outputting fault prompt information and/or stopping operating the compressor.
Preferably, after the step of reducing the operating frequency of the compressor, the control method of the air conditioner further includes:
and when the current air suction pressure value at the air suction port of the compressor is less than or equal to the preset pressure value, increasing the opening degree of a throttling device of the air conditioner.
Preferably, the step of reducing the operating frequency of the compressor comprises:
acquiring a current operation frequency value of the air conditioner;
reducing a preset frequency value on the basis of the current operating frequency value.
Preferably, the control method of the air conditioner further includes:
after the air conditioner is started, acquiring a working signal of a four-way valve of the air conditioner in real time or at regular time;
and after at least two four-way valves are collected to change working signals, judging that the defrosting of the air conditioner is finished.
In order to achieve the above object, the present invention also provides an air conditioner, comprising: the air conditioner control program is stored on the memory and can run on the processor, and when being executed by the processor, the air conditioner control program realizes the control method of the air conditioner.
The present invention provides a computer-readable storage medium having stored thereon an air conditioner control program which, when executed by a processor, implements the control method of an air conditioner as described above.
According to the air conditioner, the control method and the computer storage medium provided by the invention, after defrosting is finished, whether the air suction pressure value is smaller than or equal to the preset pressure value or not is judged by detecting the air suction pressure value at the air suction port of the compressor of the air conditioner, and if the air suction pressure value is smaller than or equal to the preset pressure value, the running frequency of the compressor is reduced, so that the temperature of a refrigerant in an outdoor heat exchanger is increased, the phenomenon that a throttling device of the air conditioner is blocked statically and cannot participate in circulation is avoided, the air conditioner is high in use comfort, and the service life of the compressor is long.
Drawings
Fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic 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 control method of an air conditioner according to a fourth embodiment of the present invention;
fig. 6 is a flowchart illustrating a fifth embodiment of a control method of 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: after defrosting is finished, detecting the air suction pressure value at the air suction port of the compressor of the air conditioner; judging whether the suction pressure value at the suction port of the compressor is less than or equal to a preset pressure value or not; and when the suction pressure value at the suction port of the compressor is less than or equal to the preset pressure value, reducing the operating frequency of the compressor.
Because the lubricating oil in the compressor of the air conditioner at present is extremely important to the normal operation of the system, the lubricating oil plays a role in lubricating, sealing and cooling the cylinder and the rotor, if the lubricating oil is insufficient, the abrasion between the cylinder and the rotor of the compressor is increased, the internal temperature is overhigh, the motor is finally burnt, and the system is crashed, and is particularly important for novel combustible refrigerants. If the oil return is not smooth due to some reason, the problems of insufficient lubricating oil of the compressor, idling heating of the motor and the like can be caused, so that the lubricating oil can normally return to the compressor and the heat of the motor is timely discharged in the design of the system.
As shown in fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
The device of the embodiment of the invention can be an air conditioner, and can also be control equipment such as a PC, a smart phone, a tablet personal computer, a portable computer, a remote controller and the like connected with the air conditioner. When other equipment is arranged outside the air conditioner, the other equipment is started by the air conditioner outdoor fan, the current switching frequency of the air conditioner outdoor classification is obtained in the running process of the compressor, the switching frequency is adjusted, and then the switching frequency is controlled to run in a variable frequency mode in the running process of the outdoor fan.
As shown in fig. 1, the apparatus may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the device may also include a camera, RF (Radio Frequency) circuitry, sensors, audio circuitry, WiFi modules, detectors (magnetic ring + hall sensor), and the like. Such as image sensors, infrared sensors, temperature sensors, and other sensors. Of course, the device may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and a temperature sensor, which are not described herein again.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting of the apparatus, and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer-readable storage medium, may include therein an operating system, a network communication module, a user interface module, and an air conditioner control application program.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the air conditioner control application stored in the memory 1005 and perform the following operations:
after defrosting is finished, detecting the air suction pressure value at the air suction port of the compressor of the air conditioner;
judging whether the suction pressure value at the suction port of the compressor is less than or equal to a preset pressure value or not;
and when the suction pressure value at the suction port of the compressor is less than or equal to the preset pressure value, reducing the operating frequency of the compressor.
Further, after the step of obtaining the current switching frequency of the outdoor air conditioner fan, the processor 1001 may be configured to call an air conditioner control application program stored in the memory 1005, and perform the following operations:
and after defrosting is finished and a first time interval is preset, executing the step of detecting the suction pressure value of the compressor of the air conditioner.
Further, the processor 1001 may be configured to call an air conditioner control application stored in the memory 1005, and perform the following operations:
after a second time interval is preset, continuously detecting the current suction pressure value at the suction port of the compressor of the air conditioner,
judging whether the current suction pressure value at the suction port of the compressor is greater than the preset pressure value or not;
and when the current air suction pressure value at the air suction port of the compressor is greater than the preset pressure value, recovering the operating frequency of the compressor.
Further, the processor 1001 may be configured to call an air conditioner control application stored in the memory 1005, and perform the following operations:
when the current air suction pressure value at the air suction port of the compressor is smaller than or equal to the preset pressure value, acquiring a current operation frequency value of the compressor;
judging whether the current operating frequency value is greater than a preset operating frequency value or not;
and returning to the step of reducing the operating frequency of the compressor when the current operating frequency value is greater than the preset operating frequency value.
Further, the processor 1001 may be configured to call an air conditioner control application stored in the memory 1005, and perform the following operations:
and when the current operation frequency value is less than or equal to the preset operation frequency value, outputting fault prompt information and/or stopping operating the compressor.
Further, the processor 1001 may be further configured to call an air conditioner control application stored in the memory 1005, and perform the following operations:
and when the current air suction pressure value at the air suction port of the compressor is less than or equal to the preset pressure value, increasing the opening degree of a throttling device of the air conditioner.
Further, the processor 1001 may be further configured to call an air conditioner control application stored in the memory 1005, and perform the following operations:
acquiring a current operation frequency value of the air conditioner;
reducing a preset frequency value on the basis of the current operating frequency value.
Further, the processor 1001 may be further configured to call an air conditioner control application stored in the memory 1005, and perform the following operations:
after the air conditioner is started, acquiring a working signal of a four-way valve of the air conditioner in real time or at regular time;
and after at least two four-way valves are collected to change working signals, judging that the defrosting of the air conditioner is finished.
Referring to fig. 2, a first embodiment of the present invention provides a control method of an air conditioner, including:
step S10, detecting the suction pressure value at the compressor suction port of the air conditioner after defrosting is finished;
the terminal of the embodiment is an air conditioner, after defrosting of the air conditioner is finished, the temperature of an outdoor heat exchanger of the air conditioner is low, and at the moment, when a refrigerant passes through the outdoor heat exchanger, based on the characteristic that the refrigerant is influenced by the temperature, when the refrigerant passes through the outdoor heat exchanger after defrosting is finished, the flowing performance of the refrigerant is changed.
And a pressure detection device is arranged on the air conditioner compressor, and the air suction port of the compressor is detected in real time or at regular time so as to obtain the air suction pressure value at the air suction port of the compressor. Through detecting the pressure value of breathing in of compressor suction port department judges refrigerant flow property like the consistency, if the refrigerant backward flow reduces like the volume of compressor, then the suction pressure of compressor can reduce, detects the refrigerant consistency through detecting the compressor pressure value of breathing in, and the degree of accuracy is high.
In the embodiment, various defrosting ending confirmation modes are provided, and specifically, after the air conditioner is started, working signals of a four-way valve of the air conditioner are collected in real time or at regular time; and after at least two four-way valves are collected to change working signals, judging that the defrosting of the air conditioner is finished. Preferably, after the air conditioner is started and runs for a third preset time, the working signals of the four-way valve of the air conditioner are collected, and particularly, the defrosting is considered to be finished if N four-way valve change signals are collected within M minutes.
Step S20, judging whether the suction pressure value at the suction port of the compressor is less than or equal to a preset pressure value;
and step S30, when the suction pressure value at the suction port of the compressor is less than or equal to the preset pressure value, reducing the operating frequency of the compressor.
In addition, when the suction pressure value at the suction port of the compressor is greater than the preset pressure value, the compressor of the air conditioner operates according to the current operating frequency, and the step S10 is continuously executed after next defrosting is finished.
Based on when the refrigerant fluidity in the outdoor heat exchanger is poor, the suction pressure at the compressor suction port can be influenced, the suction pressure value of the compressor corresponding to the viscosity value of the safe flowing refrigerant is preset according to the characteristics of the refrigerant, in this embodiment, the preset pressure value is the pressure value corresponding to the viscosity value of the safe flowing refrigerant, namely, the refrigerant is in a safe flowing state above the preset pressure value, and if the pressure value of the compressor is lower than the preset pressure value, the viscosity of the refrigerant is too high, so that the fluidity of the refrigerant is easily influenced, and the throttling device is blocked. Therefore, the flow state of the refrigerant is judged by judging whether the suction pressure value at the suction port of the compressor is smaller than the preset pressure value. When the suction pressure value of the compressor is smaller than or equal to the preset pressure value, the viscosity of the refrigerant is high, and when the air conditioner continues to operate at the current operating frequency, the refrigerant blocks the throttling device, so that the operating frequency of the compressor is reduced.
The mode of reducing the operating frequency of the compressor may be to reduce a preset frequency Δ F value, and the step of specifically reducing the operating frequency of the compressor includes: when the pressure value of the compressor is smaller than or equal to a preset pressure value, acquiring a current operation frequency value of the air conditioner; and reducing a preset frequency delta value on the basis of the current running frequency value. Namely, on the basis of the current operation frequency value of the air conditioner, the preset frequency delta F value is reduced, the air conditioner compressor operates according to the frequency after the preset frequency value delta F is reduced, the operation frequency of the compressor is reduced according to the actual operation frequency of the compressor, and the safe operation of the air conditioner is ensured, wherein the preset frequency delta F value cannot be too large, so that the situation that the temperature measurement of the outdoor heat exchanger is inaccurate due to the fact that the frequency of the compressor changes too fast is avoided.
It will be appreciated that the manner of reducing the operating frequency of the compressor may be other manners, such as the step of reducing the operating frequency of the compressor comprising: and when the suction pressure value at the suction port of the compressor is smaller than or equal to a preset pressure value, controlling the compressor to reduce a preset operation frequency value on the basis of a preset operation frequency.
This embodiment is after defrosting, through the pressure value of breathing in that detects air conditioner compressor suction opening department, judges whether this pressure value of breathing in is less than or equal to and predetermines the pressure value, if this pressure value of breathing in is less than or equal to when predetermineeing the pressure value, reduces the operating frequency of compressor for refrigerant temperature rises back in the outdoor heat exchanger, thereby can't participate in the circulation by the throttling arrangement who avoids being static jam air conditioner, and it is high to realize air conditioner use travelling comfort, the long service life of compressor.
Referring to fig. 3, a second embodiment of the present invention provides a control method of an air conditioner, which is based on the above-mentioned embodiment shown in fig. 2, and further includes:
and step S40, after defrosting is finished and a first time interval is preset, executing the step of detecting the suction pressure value of the compressor suction port of the air conditioner.
In order to reduce the air suction pressure value of the air conditioner at the air suction port of the compressor and process the air suction pressure value data, the pressure value of the compressor of the air conditioner can be detected after a preset time interval based on that the influence of the fluidity of the refrigerant in the heat exchanger is small in a certain time after defrosting is finished.
The first preset time interval is a time interval from the defrosting end of the air conditioner to the mobility change of the refrigerant in a normal use state, and the first preset time interval is correspondingly different according to different air conditioners or operation without using users or different operation frequencies. The preset first time interval cannot be too long, and if the preset first time interval is too long, the throttling device is blocked in the accommodating part, and the compressor runs at a high frequency for a long time to generate heat in an idle running mode, so that the compressor is damaged.
After defrosting is finished, step S10 is executed only after a first time interval is preset, detection and processing of the suction pressure value at the suction port of the compressor of the air conditioner are reduced, and meanwhile, the service performance and the service life of the compressor are protected.
Referring to fig. 4, a third embodiment of the present invention provides a control method of an air conditioner, which is based on the above-mentioned embodiment shown in fig. 3, and after the step of reducing the operating frequency of the compressor, the control method of the air conditioner further includes:
step S50, after a second time interval is preset, continuously detecting the current suction pressure value at the suction port of the compressor of the air conditioner;
that is, after the air conditioner operates according to the operating frequency after the preset frequency value is reduced for a preset second time interval, the current suction pressure value at the compressor suction port of the air conditioner is detected again, the flowing performance of the refrigerant such as viscosity is judged by detecting the current suction pressure value at the compressor suction port, if the amount of the refrigerant flowing back to the compressor is reduced, the suction pressure of the compressor is reduced, the annual compactness of the refrigerant is detected by detecting the suction pressure value of the compressor, and the accuracy is high. It can be understood that the air conditioner can detect the current air suction pressure value at the compressor air suction port of the air conditioner in real time, and also can detect after presetting a second time interval, preferably presets the interval after the second time interval, reduces the detection and processing of the current air suction pressure value at the compressor air suction port, and the second preset time interval is not suitable for overlong.
Step S60, judging whether the current suction pressure value at the suction port of the compressor is greater than the preset pressure value;
and step S70, when the current suction pressure value at the suction port of the compressor is greater than the preset pressure value, recovering the running frequency of the compressor.
In this embodiment, the preset pressure value is also a pressure value corresponding to the preset safe flowing viscosity value described in the above embodiment, that is, the refrigerant is in a safe flowing state above the preset pressure value, and if the pressure value of the compressor is lower than the preset pressure value, the viscosity of the refrigerant is too high, which easily affects the flowability of the refrigerant, thereby blocking the throttling device. Therefore, the flow state of the refrigerant is judged by judging whether the pressure value of the compressor is smaller than the preset pressure value.
In order to enable the compressor to return to normal operation as soon as possible, the evaporating temperature of the indoor unit is increased, the comfort brought to a user by the air conditioner is guaranteed, the current air suction pressure value of the air suction port of the compressor of the air conditioner is judged after the second time interval is preset, and the running frequency of the compressor is recovered when the current air suction pressure value of the air suction port of the compressor is greater than the preset pressure value. That is, when the current suction pressure value at the suction port of the compressor reaches the safety pressure value, the operation frequency of the compressor is restored to the operation frequency before the reduction, so that the compressor of the air conditioner operates according to the normal operation frequency.
It can be understood that, the manner of recovering the operating frequency of the compressor may further determine a difference between the actual operating frequency value and the preset operating frequency value by obtaining the current actual operating frequency value and a frequency value corresponding to the preset operating frequency, and further determine an adjustment value, and adjust the operating frequency of the compressor according to the adjustment value. Or, increasing the preset frequency value on the basis of the current actual operating frequency value by acquiring the current actual operating frequency value so as to recover to the initial operating frequency value.
In addition, when the current suction pressure value at the compressor suction port is less than or equal to the preset pressure value, it is indicated that the refrigerant flowability at the current suction pressure value at the compressor suction port is poor, and the throttling device is still easily blocked, so the temperature of the outdoor heat exchanger needs to be processed, for example, the temperature of the outdoor heat exchanger needs to be continuously increased.
This embodiment is through after predetermineeing second time interval, detects the current pressure value of breathing in of compressor suction port department, and judges whether the current pressure value of breathing in of compressor suction port department is greater than predetermined pressure value, in order to confirm at present whether outdoor heat exchanger's temperature is the safe temperature that the refrigerant flows outdoor heat exchanger's current temperature is when the safe temperature that the refrigerant flows, replies compressor operating frequency to original operating frequency to let the compressor reply normal operating as early as possible, improve the evaporating temperature of indoor set, guarantee the travelling comfort that the air conditioner brought for the user.
Referring to fig. 5, a fourth embodiment of the present invention provides a method for controlling an air conditioner, based on the above embodiment shown in fig. 4, after the step of reducing the operating frequency of the compressor, the method further includes:
step S80, when the current suction pressure value at the suction port of the compressor is less than or equal to the preset pressure value, obtaining the current operation frequency value of the compressor;
step S90, judging whether the current operation frequency value is larger than a preset operation frequency value;
and returning to the step of reducing the operating frequency of the compressor when the current operating frequency value is greater than the preset operating frequency value. That is, when the current operating frequency value is greater than the preset operating frequency value, the operating frequency of the compressor continues to be decreased, wherein the step of decreasing the operating frequency of the compressor is to decrease the operating frequency of the compressor again on the basis of decreasing the operating frequency of the compressor in the first embodiment.
When the current suction pressure value at the compressor suction port is less than or equal to the preset pressure value, the temperature of the outdoor heat exchanger needs to be continuously processed in order to prevent the refrigerant in the outdoor heat exchanger from blocking the throttling device, in this embodiment, the temperature of the outdoor heat exchanger is raised in a manner of continuously reducing the operating frequency of the compressor, so that the condensing temperature is not too low to cause viscosity and influence flow, and meanwhile, the compressor is prevented from being damaged when the operating frequency of the compressor is too low, when the current suction pressure value at the compressor suction port is less than or equal to the preset pressure value, the current operating frequency value of the compressor is obtained, and when the current operating frequency value is greater than the preset operating frequency value, the operating frequency of the compressor is continuously reduced. The preset operation frequency value is the lowest operation frequency safety value of the compressor, and the preset operation frequency value cannot be too large, so that the situation that the compressor reaches a shutdown value too early and is judged mistakenly is avoided.
In this embodiment, when the current suction pressure value at the suction port of the compressor is less than or equal to the preset pressure value, the operation frequency of the compressor is determined to be within the safe range, and the operation frequency of the compressor is continuously reduced, so that the temperature of the outdoor heat exchanger is increased by reducing the operation frequency of the compressor while the safe operation of the compressor is protected, and the refrigerant in the outdoor heat exchanger is prevented from blocking the throttling device.
Referring to fig. 6, a fifth embodiment of the present invention provides a control method of an air conditioner, based on the above embodiment of fig. 5, after the step of reducing the operating frequency of the compressor, the control method of the air conditioner further includes:
and S100, outputting fault prompt information and/or stopping running the compressor when the current running frequency value is less than or equal to the preset running frequency value.
When the current operation frequency value is less than or equal to the preset operation frequency value, the compressor is in a low operation frequency state, and if the compressor is continuously operated at the operation frequency, the compressor can be damaged, so that fault prompt information is output, or the compressor is directly stopped to operate, or the fault prompt information is output while the compressor is stopped to operate.
In this embodiment, the fault notification information may be directly output on the display interface of the indoor unit of the air conditioner, or the fault notification information may be sent to the mobile terminal to prompt the user. The fault prompt message can be a text prompt message, a language prompt message, an outdoor unit fault code or a preset alarm sound prompt message.
In this embodiment, when the current operating frequency value is less than or equal to the preset operating frequency value, a fault prompt message is output, and/or the operation of the compressor is stopped, so as to protect the compressor of the air conditioner.
Referring to fig. 7, a sixth embodiment of the present invention provides a method for controlling an air conditioner, based on the above embodiment shown in fig. 4, after the step of reducing the operating frequency of the compressor, the method further includes:
and step S110, when the current suction pressure value at the suction port of the compressor is less than or equal to the preset pressure value, increasing the opening degree of a throttling device of the air conditioner.
When the current suction pressure value at the compressor suction port is smaller than or equal to the preset pressure value, the temperature of the outdoor heat exchanger needs to be continuously processed in order to prevent the refrigerant in the outdoor heat exchanger from blocking the throttling device.
It can be understood that, in order to recover the normal operation frequency of the compressor as much as possible, the operation frequency of the compressor can be recovered while the opening degree of the throttling device is increased, so as to improve the evaporation temperature of the indoor unit and ensure the comfort brought by the air conditioner to users.
This embodiment is in current pressure value of breathing in of compressor suction opening department is less than or equal to when presetting the pressure value, through the mode of the aperture of the throttling arrangement of increase air conditioner, realize preventing that the refrigerant from blockking up throttling arrangement, improve the performance and the life of air conditioner.
In addition, based on all the embodiments, in the actual control process, corresponding parameters such as the rotating speed of the fan and the like can be changed according to the preset operation rule of the air conditioner.
According to the air conditioner and the air conditioner control method, a first preset time interval, a second preset time interval, a preset frequency delta F value, a preset frequency value and a preset pressure value can be selected according to the type of the air conditioner and/or the type of refrigerant compressor oil used, wherein the first preset time interval range is 5-15min, the second preset time interval range is 1-2min, the preset frequency delta F value is 3-8Hz, the preset frequency value is 10-20Hz, and the preset pressure value is 85-140 kPa. The known flammable refrigerant is R290 or R32.
An embodiment of the present invention further provides an air conditioner, including: the air conditioner control program is stored on the memory and can run on the processor, and when being executed by the processor, the air conditioner control program realizes the control method of the air conditioner.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, where an air conditioner control program is stored on the computer-readable storage medium, and when the air conditioner control program is executed by the processor, the air conditioner control program implements the steps of the control method of the air conditioner.
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 system 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 system. 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 system that comprises the element.
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.
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 readable storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above, and includes several instructions for enabling a terminal device (such as 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 (9)
1. A control method of an air conditioner is characterized by comprising the following steps:
after the air conditioner is started, a four-way valve change working signal of a four-way valve of the air conditioner is collected in real time or at regular time;
after at least two four-way valves are collected to change working signals, judging that the defrosting of the air conditioner is finished;
after defrosting is finished, detecting the air suction pressure value at the air suction port of the compressor of the air conditioner;
judging whether the suction pressure value at the suction port of the compressor is smaller than or equal to a preset pressure value, wherein the preset pressure value is a pressure value corresponding to the viscosity value of the refrigerant of the compressor in a safe flowing state;
when the suction pressure value at the suction port of the compressor is smaller than or equal to a preset pressure value, acquiring the current operation frequency value of the air conditioner;
and reducing a preset frequency value on the basis of the current operation frequency value so as to reduce the temperature of the refrigerant.
2. The control method of an air conditioner according to claim 1, further comprising:
and after defrosting is finished and a first time interval is preset, executing the step of detecting the suction pressure value at the suction port of the compressor of the air conditioner.
3. The control method of an air conditioner according to claim 2, wherein after the step of reducing the operating frequency of the compressor, the control method of an air conditioner further comprises:
after a second time interval is preset, continuously detecting the current suction pressure value at the suction port of the compressor of the air conditioner;
judging whether the current suction pressure value at the suction port of the compressor is greater than the preset pressure value or not;
and when the current air suction pressure value at the air suction port of the compressor is greater than the preset pressure value, recovering the operating frequency of the compressor.
4. The control method of an air conditioner according to claim 3, wherein after the step of reducing the operating frequency of the compressor, the control method of an air conditioner further comprises:
when the current air suction pressure value at the air suction port of the compressor is smaller than or equal to the preset pressure value, acquiring a current operation frequency value of the compressor;
judging whether the current operating frequency value is greater than a preset operating frequency value or not;
and returning to the step of reducing the operating frequency of the compressor when the current operating frequency value is greater than the preset operating frequency value.
5. The control method of an air conditioner according to claim 4, wherein after the step of reducing the operating frequency of the compressor, the control method of an air conditioner further comprises:
and when the current operation frequency value is less than or equal to the preset operation frequency value, outputting fault prompt information and/or stopping operating the compressor.
6. The control method of an air conditioner according to claim 3, wherein after the step of reducing the operating frequency of the compressor, the control method of an air conditioner further comprises:
and when the current air suction pressure value at the air suction port of the compressor is less than or equal to the preset pressure value, increasing the opening degree of a throttling device of the air conditioner.
7. The control method of an air conditioner according to claim 1, wherein the step of reducing the operating frequency of the compressor comprises:
acquiring a current operation frequency value of the air conditioner;
reducing a preset frequency value on the basis of the current operating frequency value.
8. An air conditioner, characterized in that the air conditioner comprises: a memory and a processor and an air conditioner control program stored on the memory and executable on the processor, the air conditioner control program, when executed by the processor, implementing a control method of an air conditioner according to any one of claims 1 to 7.
9. A computer-readable storage medium, characterized in that an air conditioner control program is stored thereon, which when executed by a processor implements the control method of an air conditioner according to any one of claims 1 to 7.
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| CN112664455B (en) * | 2019-10-15 | 2023-02-21 | 广东芬尼克兹节能设备有限公司 | Lubrication adjusting method and device for compressor, electronic equipment and storage medium |
| CN113137789B (en) * | 2021-04-15 | 2023-02-03 | 青岛海尔空调电子有限公司 | Control method of refrigeration system and refrigeration system |
| CN113007862B (en) * | 2021-04-20 | 2022-07-12 | 宁波奥克斯电气股份有限公司 | Air suction side pressure determining method and module, air conditioner control method and device and multi-split air conditioner |
| CN115164525A (en) * | 2022-06-27 | 2022-10-11 | 青岛海尔空调电子有限公司 | Detection method for drying system, storage medium and drying system |
| CN115789864A (en) * | 2022-12-09 | 2023-03-14 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioner outdoor unit defrosting control method and device, air conditioner and storage medium |
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| CN105627496A (en) * | 2014-10-29 | 2016-06-01 | 青岛海尔空调器有限总公司 | Low-temperature refrigerating control method of air conditioner and air conditioner |
| CN105091226B (en) * | 2015-08-07 | 2018-11-06 | 广东美芝制冷设备有限公司 | The control method and control device of air-conditioning system |
| CN105570987B (en) * | 2015-12-31 | 2019-01-29 | 广东美的制冷设备有限公司 | Air-conditioning system, air-conditioning system oil stifled processing method and processing unit |
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| CN105465968B (en) * | 2015-12-31 | 2017-10-03 | 广东美的制冷设备有限公司 | The stifled detection method of air-conditioning system oil and detection means, air conditioner |
| CN107044718B (en) * | 2017-05-09 | 2019-10-22 | 广东美的制冷设备有限公司 | The control method of air conditioner, the control device of air conditioner and air conditioner |
| CN107906700A (en) * | 2017-10-19 | 2018-04-13 | 广东美的制冷设备有限公司 | Air conditioner and its control method, control device and computer-readable recording medium |
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