CN111397162B - Control method of air conditioner, multi-split air conditioner and storage medium - Google Patents
Control method of air conditioner, multi-split air conditioner and storage medium Download PDFInfo
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- CN111397162B CN111397162B CN202010240349.8A CN202010240349A CN111397162B CN 111397162 B CN111397162 B CN 111397162B CN 202010240349 A CN202010240349 A CN 202010240349A CN 111397162 B CN111397162 B CN 111397162B
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method of an air conditioner, which comprises the following steps: acquiring return air temperature and return air pressure corresponding to a compressor of the multi-split air conditioner; and closing the electronic expansion valve corresponding to the target indoor unit by a preset step number when the target indoor unit meets the inner leakage condition according to the air return temperature and the air return pressure. The invention also discloses a multi-split air conditioner and a computer readable storage medium, and the effect of improving the reliability of the multi-split air conditioner is achieved.
Description
Technical Field
The present invention relates to the field of air conditioners, and in particular, to a method for controlling an air conditioner, a multi-split air conditioner, and a computer-readable storage medium.
Background
The multi-split central air conditioner is a type of central air conditioner, commonly called as 'one driving more', and refers to a primary refrigerant air conditioning system in which an outdoor unit is connected with two or more indoor units through a pipe, the outdoor side adopts an air cooling heat exchange mode, and the indoor side adopts a direct evaporation heat exchange mode. The multi-split system is widely applied to small and medium-sized buildings and part of public buildings at present.
When the multi-split central air conditioner is in use, a user can selectively open part of indoor units according to requirements. When the multi-split air conditioner only opens part of the indoor units, if the indoor units in the shutdown state cause internal leakage due to the opening drift of the electronic expansion valve, the refrigerant which does not exchange heat fully can directly flow back to the air suction port, and the refrigerant of the air suction port is in a two-phase state. And the refrigerant in the two-phase state directly flows back to the compressor, which may cause the reliability of the multi-split air conditioner to be reduced.
Disclosure of Invention
The invention mainly aims to provide a control method of an air conditioner, a multi-split air conditioner and a computer readable storage medium, and aims to achieve the effect of improving the reliability of the multi-split air conditioner.
In order to achieve the above object, the present invention provides a method for controlling an air conditioner, comprising the steps of:
acquiring return air temperature and return air pressure corresponding to a compressor of the multi-split air conditioner;
and closing the electronic expansion valve corresponding to the target indoor unit by a preset step number when the target indoor unit meets the inner leakage condition according to the air return temperature and the air return pressure.
Optionally, the internal leakage condition comprises:
and within a preset time, the return air temperature is continuously less than or equal to a target temperature, wherein the target temperature is determined according to the return air pressure.
Optionally, before the step of closing the electronic expansion valve corresponding to the target indoor unit by a preset number of steps when it is determined that the target indoor unit meets the inner leakage condition according to the return air temperature and the return air pressure, the method further includes:
and when only one indoor unit in the shutdown state exists in the multi-split air conditioner, taking the indoor unit in the shutdown state as the target indoor unit.
Optionally, before the step of closing the electronic expansion valve corresponding to the target indoor unit by a preset number of steps when it is determined that the target indoor unit meets the inner leakage condition according to the return air temperature and the return air pressure, the method further includes:
when at least two indoor units in a shutdown state are available, acquiring the outlet pipe temperature of an indoor heat exchanger of the indoor unit in the shutdown state and the ambient temperature of the environment where the indoor units are located;
and determining the target indoor unit according to the outlet pipe temperature and the environment temperature.
Optionally, the step of determining the target indoor unit according to the outlet pipe temperature and the ambient temperature includes:
and taking the indoor unit with the outlet pipe temperature being less than the ambient temperature and the duration being greater than the preset duration as the target indoor unit.
Optionally, before the step of obtaining the return air temperature and the return air pressure corresponding to the compressor of the multi-split air conditioner, the method further includes:
and determining that the multi-split air conditioner operates in a refrigeration mode and at least one indoor unit in a shutdown state exists, and executing the step of acquiring return air temperature and return air pressure corresponding to a compressor of the multi-split air conditioner.
Optionally, before the step of obtaining the return air temperature and the return air pressure corresponding to the compressor of the multi-split air conditioner, the method further includes:
determining that the multi-split air conditioner has an indoor unit with the shutdown time length longer than the preset time length, and executing the step of acquiring the return air temperature and the return air pressure corresponding to a compressor of the multi-split air conditioner;
before the step of closing the electronic expansion valve corresponding to the target indoor unit by a preset step number when the target indoor unit is determined to meet the inner leakage condition according to the return air temperature and the return air pressure, the method further comprises the following steps:
acquiring the outlet pipe temperature of the indoor heat exchanger of the indoor unit and the environmental temperature of the environment, wherein the shutdown time is longer than the preset time;
and taking the indoor unit which meets the condition that the outlet pipe temperature is less than or equal to the ambient temperature as the target indoor unit.
Optionally, the internal leakage condition includes the return air temperature being less than or equal to a target temperature, wherein the target temperature is determined according to the return air pressure.
Optionally, before the step of closing the electronic expansion valve corresponding to the target indoor unit by a preset number of steps when it is determined that the target indoor unit meets the inner leakage condition according to the return air temperature and the return air pressure, the method further includes:
determining the two-phase temperature of a system refrigerant according to the return air pressure;
and determining the target temperature according to the two-phase temperature.
In addition, to achieve the above object, the present invention further provides a multi-split air conditioner including a memory, a processor, and a control program of the multi-split air conditioner stored in the memory and operable on the processor, wherein the control program of the multi-split air conditioner, when executed by the processor, implements the steps of the control method of the air conditioner as described above.
In addition, to achieve the above object, the present invention also provides a computer readable storage medium having stored thereon a control program of a multi-split air conditioner, the control program of the multi-split air conditioner, when being executed by a processor, implementing the steps of the control method of the air conditioner as described above.
The control method of the air conditioner, the multi-split air conditioner and the computer readable storage medium provided by the embodiment of the invention can acquire the return air temperature and the return air pressure corresponding to the compressor of the multi-split air conditioner, and then close the electronic expansion valve corresponding to the target indoor unit by a preset step number when the target indoor unit meets the internal leakage condition according to the return air temperature and the return air pressure. Because the corresponding electronic expansion valve can be closed by a preset step number when the target indoor unit meets the internal leakage condition, the defect that the reliability of the multi-split air conditioner is reduced due to the fact that the electronic expansion valve of the indoor unit in the shutdown state of the multi-split air conditioner drifts can be effectively overcome. And moreover, the phenomenon of capacity waste caused by internal leakage of the indoor unit in a shutdown state is avoided, so that the effect of improving the reliability of the multi-split air conditioner is achieved, and the effect of improving the energy efficiency ratio of the multi-split air conditioner is improved.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating an embodiment of a method for controlling an air conditioner according to the present invention;
fig. 3 is a flowchart illustrating a control method of an air conditioner according to another 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.
When the multi-split central air conditioner is in use, a user can selectively open part of indoor units according to requirements. When the multi-split air conditioner only opens part of the indoor units, if the indoor units in the shutdown state cause internal leakage due to the opening drift of the electronic expansion valve, the refrigerant which does not exchange heat fully can directly flow back to the air suction port, and the refrigerant of the air suction port is in a two-phase state. And the refrigerant in the two-phase state directly flows back to the compressor, which may cause the reliability of the multi-split air conditioner to be reduced.
The main solution of the embodiment of the control method of the air conditioner of the invention is as follows:
acquiring return air temperature and return air pressure corresponding to a compressor of the multi-split air conditioner;
and closing the electronic expansion valve corresponding to the target indoor unit by a preset step number when the target indoor unit meets the inner leakage condition according to the air return temperature and the air return pressure.
Because the corresponding electronic expansion valve can be closed by a preset step number when the target indoor unit meets the internal leakage condition, the defect that the reliability of the multi-split air conditioner is reduced due to the fact that the electronic expansion valve of the indoor unit in the shutdown state of the multi-split air conditioner drifts can be effectively overcome. And moreover, the phenomenon of capacity waste caused by internal leakage of the indoor unit in a shutdown state is avoided, so that the effect of improving the reliability of the multi-split air conditioner is achieved, and the effect of improving the energy efficiency ratio of the multi-split air conditioner is improved.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention can be terminal equipment such as a multi-split air conditioner and the like.
As shown in fig. 1, the terminal 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 like, 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.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting 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 storage medium, may include therein an operating system, a network communication module, a user interface module, and a control program of the multi-split air conditioner.
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 processor 1001 may be configured to call a control program of the multi-split air conditioner stored in the memory 1005, and perform the following operations:
acquiring return air temperature and return air pressure corresponding to a compressor of the multi-split air conditioner;
and closing the electronic expansion valve corresponding to the target indoor unit by a preset step number when the target indoor unit meets the inner leakage condition according to the air return temperature and the air return pressure.
Further, the processor 1001 may call a control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
and when only one indoor unit in the shutdown state exists in the multi-split air conditioner, taking the indoor unit in the shutdown state as the target indoor unit.
Further, the processor 1001 may call a control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
when at least two indoor units in a shutdown state are available, acquiring the outlet pipe temperature of an indoor heat exchanger of the indoor unit in the shutdown state and the ambient temperature of the environment where the indoor units are located;
and determining the target indoor unit according to the outlet pipe temperature and the environment temperature.
Further, the processor 1001 may call a control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
and taking the indoor unit with the outlet pipe temperature being less than the ambient temperature and the duration being greater than the preset duration as the target indoor unit.
Further, the processor 1001 may call a control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
and determining that the multi-split air conditioner operates in a refrigeration mode and at least one indoor unit in a shutdown state exists, and executing the step of acquiring return air temperature and return air pressure corresponding to a compressor of the multi-split air conditioner.
Further, the processor 1001 may call a control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
determining that the multi-split air conditioner has an indoor unit with the shutdown time length longer than the preset time length, and executing the step of acquiring the return air temperature and the return air pressure corresponding to a compressor of the multi-split air conditioner;
before the step of closing the electronic expansion valve corresponding to the target indoor unit by a preset step number when the target indoor unit is determined to meet the inner leakage condition according to the return air temperature and the return air pressure, the method further comprises the following steps:
acquiring the outlet pipe temperature of the indoor heat exchanger of the indoor unit and the environmental temperature of the environment, wherein the shutdown time is longer than the preset time;
and taking the indoor unit which meets the condition that the outlet pipe temperature is less than or equal to the ambient temperature as the target indoor unit.
Further, the processor 1001 may call a control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
determining the two-phase temperature of a system refrigerant according to the return air pressure;
and determining the target temperature according to the two-phase temperature.
Referring to fig. 2, in an embodiment of the control method of an air conditioner of the present invention, the control method of an air conditioner includes the steps of:
s10, acquiring return air temperature and return air pressure corresponding to a compressor of the multi-split air conditioner;
and step S20, when the target indoor unit is determined to meet the inner leakage condition according to the return air temperature and the return air pressure, closing the electronic expansion valve corresponding to the target indoor unit by a preset step number.
In this embodiment, the multi-split air conditioner refers to an air conditioner in which one outdoor unit is connected to two or more indoor units through pipes. In the using process of the multi-split air conditioner, a user can selectively open one indoor unit or a plurality of indoor units according to the requirement. In the using process of the multi-split air conditioner, the phenomena that part of indoor units are opened and the other part of indoor units are closed occur. Because a plurality of indoor units of the multi-split air conditioner share the same outdoor unit, when part of the indoor units are opened and part of the indoor units are closed, if the opening degree of the electronic expansion valve of the indoor unit in the closed state drifts, when the multi-split air conditioner is in a refrigeration mode, liquid refrigerant flows through the indoor unit in the closed state. However, since the fan of the indoor unit in the shutdown state is not in operation, the liquid refrigerant flowing through the indoor unit in the shutdown state cannot be sufficiently converted into a gas refrigerant by heat exchange, and directly flows back to the air return port of the compressor in a liquid form. When the amount of the liquid refrigerant is large, the refrigerant at the air return port is in a two-phase state, and the refrigerant in the two-phase state directly flows back to the compressor, so that the reliability of the multi-split air conditioner is reduced.
Therefore, when the multi-split air conditioner operates in a refrigeration mode and the indoor unit is in a shutdown state, the return air temperature and the return air pressure corresponding to the compressor of the multi-split air conditioner can be acquired.
It should be noted that, in order to obtain the return air temperature and the return air pressure of the multi-split air conditioner, an air suction temperature sensing bag may be disposed at the return air port of the compressor of the multi-split air conditioner, so as to obtain the return air temperature of the compressor of the multi-split air conditioner through the air suction temperature sensing bag, and a low pressure sensor may be disposed at the return air port, so as to obtain the return air pressure of the compressor through the low pressure sensor.
Further, after the return air temperature and the return air pressure are obtained, when it is determined that the target indoor unit meets the inner leakage condition according to the return air temperature and the return air pressure, the electronic expansion valve corresponding to the target indoor unit is turned off by a preset number of steps.
Specifically, after the return air pressure is obtained, the type of the refrigerant corresponding to the multi-split air conditioner may be determined, and then based on the type of the refrigerant and the return air pressure, the return air pressure may be converted into a two-phase temperature of the refrigerant corresponding to the return air port according to a preset pressure-temperature conversion relationship. The two-phase temperature is then taken as the target temperature. And determining whether the target indoor unit meets an inner leakage condition or not according to the size relation between the return air temperature and the target temperature. And when the target indoor unit does not meet the internal leakage condition, the multi-split air conditioner does not respond. And when the target indoor unit meets the internal leakage condition, the multi-split air conditioner closes the electronic expansion valve corresponding to the target indoor unit by a preset step number. The preset step number can be determined according to the type of the multi-split air conditioner, and when the type of the multi-split air conditioner is different, the preset step number can also be different. The present embodiment does not limit the specific value of the preset number of steps.
For example, when it is determined that the target indoor unit satisfies the inner leakage condition, a specific value of the preset step number pre-stored in the local storage medium may be read, and then the electronic expansion valve of the target indoor unit is turned off by the preset step number. Or the model identification corresponding to the target indoor unit can be sent to a server, so that the server feeds back the corresponding specific numerical value of the preset step number to the multi-split air conditioner when receiving the model identification.
It should be noted that the internal leakage condition may be set such that the return air temperature is continuously less than or equal to the target temperature for a preset time period.
It is understood that the two-phase temperature can be directly used as the target temperature, and the target temperature can also be calculated according to the two-phase temperature and a fixed redundancy number. For example, the sum of the fixed redundancy value and the two-phase temperature is taken as the target temperature. Wherein the redundancy value may be set to 1 ℃.
It is understood that before the step S20, the target indoor unit may be determined. An example of the manner of determining the target indoor unit in the present embodiment is as follows:
example 1, when the multi-split air conditioner has only one compressor in the shutdown state, the compressor in the shutdown state may be used as the target indoor unit. And then judging whether the multi-split air conditioner continuously meets the condition that the return air temperature is less than or equal to the target temperature within a preset time length. If so, judging that the target indoor unit meets the inner leakage condition, otherwise, judging that the target indoor unit does not meet the inner leakage condition. It should be noted that the preset time period may be set to any value within 10 to 60 minutes according to the model of the multi-split air conditioner, for example, the preset time period may be set to 10 minutes, 20 minutes, or 30 minutes.
Example 2, when the multi-split air conditioner is operated in a cooling mode, and at least two indoor units in an off state are included in the indoor units of the multi-split air conditioner, the outlet pipe temperature of each indoor unit in the off state may be obtained, and then the indoor unit in which the outlet pipe temperature is lower than the ambient temperature and the duration is longer than a preset duration is used as the target indoor unit. It is understood that, in order to avoid the misjudgment, the indoor unit that is set such that the outlet pipe temperature is less than the judgment temperature value determined according to the ambient temperature within the preset time period may be used as the target indoor unit. Wherein the determination temperature may be set to a difference between the ambient temperature and a redundancy value. The redundancy value may be set to 1 ℃.
In the technical scheme disclosed in this embodiment, the return air temperature and the return air pressure corresponding to the compressor of the multi-split air conditioner can be obtained, and then when it is determined that the target indoor unit meets the internal leakage condition according to the return air temperature and the return air pressure, the electronic expansion valve corresponding to the target indoor unit is turned off by a preset step number. Because the corresponding electronic expansion valve can be closed by a preset step number when the target indoor unit meets the internal leakage condition, the defect that the reliability of the multi-split air conditioner is reduced due to the fact that the electronic expansion valve of the indoor unit in the shutdown state of the multi-split air conditioner drifts can be effectively overcome. And moreover, the phenomenon of capacity waste caused by internal leakage of the indoor unit in a shutdown state is avoided, so that the effect of improving the reliability of the multi-split air conditioner is achieved, and the effect of improving the energy efficiency ratio of the multi-split air conditioner is improved.
Referring to fig. 3, in another embodiment of the control method of an air conditioner of the present invention, the control method of an air conditioner includes the steps of:
step S30, detecting whether an indoor unit of the multi-split air conditioner has a shutdown duration longer than a preset duration;
s10, acquiring return air temperature and return air pressure corresponding to a compressor of the multi-split air conditioner;
and step S20, when the target indoor unit is determined to meet the inner leakage condition according to the return air temperature and the return air pressure, closing the electronic expansion valve corresponding to the target indoor unit by a preset step number.
In this embodiment, when the multi-split air conditioner operates in the cooling mode, whether an indoor unit of which the shutdown time length is longer than a preset time length exists in the multi-split air conditioner can be detected in real time. And when the multi-split air conditioner does not have an indoor unit with the shutdown time length longer than the preset time length, the multi-split air conditioner does not respond. When the multi-split air conditioner has an indoor unit with the shutdown time length longer than the preset time length, the return air temperature and the return air pressure corresponding to the compressor of the multi-split air conditioner can be obtained. And after the return air temperature and the return air pressure are obtained, a target indoor unit of the multi-split air conditioner can be determined. The preset time period can be set to any value of 10-60 minutes in a self-defined mode, for example, 10 minutes or 30 minutes.
Example 1, when the multi-split air conditioner operates in the cooling mode, the shutdown duration of each room in the shutdown state may be obtained first. When there is an indoor unit whose shutdown duration is longer than the preset duration, the indoor unit whose shutdown duration is longer than the preset duration may be used as a candidate indoor unit, and then the outlet pipe temperature of the indoor heat exchanger corresponding to each candidate indoor unit (i.e., the temperature at the refrigerant outlet of the indoor heat exchanger) and the ambient temperature corresponding to the environment where each indoor unit is located are obtained. And then taking the indoor unit to be selected with the outlet pipe temperature less than the ambient temperature as the target indoor unit. The shutdown duration can be reset after the corresponding indoor unit executes the startup action, and the timing is started when the corresponding indoor unit receives the shutdown instruction. It can be understood that the multi-split air conditioner may be provided with a communication module or a control panel, so that a user may receive a control instruction sent by the mobile terminal through the communication module, or directly interact with the user through the control panel to receive the control instruction input by the user, thereby closing the corresponding indoor unit according to the control instruction.
In example 2, when the multi-split air conditioner operates in the cooling mode, the shutdown duration of each of the rooms in the shutdown state may be obtained first. When there is an indoor unit whose shutdown duration is longer than the preset duration, the indoor unit whose shutdown duration is longer than the preset duration may be used as the indoor unit to be selected. And when only one indoor unit to be selected exists, taking the indoor unit to be selected as the target indoor unit.
Further, after the target indoor unit is determined, whether the target indoor unit meets an inner leakage condition can be judged according to the acquired return air temperature and the return air pressure corresponding to the current moment. Wherein the internal leakage condition comprises: the internal leakage condition includes that the return air temperature is less than or equal to a target temperature, wherein the target temperature is determined according to the return air pressure.
In this embodiment, whether an indoor unit of a multi-split air conditioner has a shutdown duration longer than a preset duration is detected, then, an air return temperature and an air return pressure corresponding to a compressor of the multi-split air conditioner are obtained, and when it is determined that a target indoor unit meets an internal leakage condition according to the air return temperature and the air return pressure, an electronic expansion valve corresponding to the target indoor unit is shut down by a preset number of steps. Therefore, the effect of improving the internal leakage detection speed of the multi-split air conditioner is achieved.
In addition, an embodiment of the present invention further provides a multi-split air conditioner, where the multi-split air conditioner includes a memory, a processor, and a control program of the multi-split air conditioner, the control program of the multi-split air conditioner being stored in the memory and being executable on the processor, and the control program of the multi-split air conditioner, when being executed by the processor, implements the steps of the control method of the air conditioner according to the above embodiments.
Furthermore, an embodiment of the present invention further provides a computer-readable storage medium, where a control program of an air conditioner is stored, and the control program of the air conditioner realizes the steps of the control method of the air conditioner according to the above embodiments when executed by a processor.
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 storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes several instructions for enabling a terminal device (e.g., a multi-split air conditioner, etc.) 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 (8)
1. A control method of an air conditioner is characterized by comprising the following steps:
acquiring return air temperature and return air pressure corresponding to a compressor of the multi-split air conditioner;
when the target indoor unit meets the inner leakage condition according to the air return temperature and the air return pressure, closing the electronic expansion valve corresponding to the target indoor unit by a preset step number;
before the step of obtaining return air temperature and return air pressure corresponding to the compressor of the multi-split air conditioner, the method further comprises the following steps:
determining that the multi-split air conditioner has an indoor unit with the shutdown time length longer than the preset time length, and executing the step of acquiring the return air temperature and the return air pressure corresponding to a compressor of the multi-split air conditioner;
before the step of closing the electronic expansion valve corresponding to the target indoor unit by a preset step number when the target indoor unit is determined to meet the inner leakage condition according to the return air temperature and the return air pressure, the method further comprises the following steps:
acquiring the outlet pipe temperature of the indoor heat exchanger of the indoor unit and the environmental temperature of the environment, wherein the shutdown time is longer than the preset time;
and taking the indoor unit which meets the condition that the outlet pipe temperature is less than or equal to the ambient temperature as the target indoor unit.
2. The control method of an air conditioner according to claim 1, wherein the internal leakage condition includes:
and within a preset time, the return air temperature is continuously less than or equal to a target temperature, wherein the target temperature is determined according to the return air pressure.
3. The method of controlling an air conditioner according to claim 1, wherein the step of regarding the indoor unit satisfying the condition that the outlet pipe temperature is less than or equal to the ambient temperature as the target indoor unit includes:
and taking the indoor unit with the outlet pipe temperature being less than the ambient temperature and the duration being greater than the preset duration as the target indoor unit.
4. The method for controlling an air conditioner according to any one of claims 1 to 3, wherein before the step of obtaining the return air temperature and the return air pressure corresponding to the compressor of the multi-split air conditioner, the method further comprises:
and determining that the multi-split air conditioner operates in a refrigeration mode and at least one indoor unit in a shutdown state exists, and executing the step of acquiring return air temperature and return air pressure corresponding to a compressor of the multi-split air conditioner.
5. The control method of an air conditioner according to claim 1, wherein the internal leakage condition includes the return air temperature being less than or equal to a target temperature, wherein the target temperature is determined based on the return air pressure.
6. The method of claim 2 or 5, wherein before the step of closing the electronic expansion valve corresponding to the target indoor unit by a predetermined number of steps when it is determined that the target indoor unit satisfies the internal leakage condition based on the return air temperature and the return air pressure, the method further comprises:
determining the two-phase temperature of a system refrigerant according to the return air pressure;
and determining the target temperature according to the two-phase temperature.
7. A multi-split air conditioner, comprising: a memory, a processor, and a control program of a multi-split air conditioner stored on the memory and operable on the processor, the control program of the multi-split air conditioner, when executed by the processor, implementing the steps of the control method of the air conditioner as recited in any one of claims 1 to 6.
8. A computer-readable storage medium, wherein a control program of a multi-split air conditioner is stored thereon, and when executed by a processor, implements the steps of the control method of the air conditioner according to any one of claims 1 to 6.
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