CN117267877A - Air conditioner control method, air conditioner and storage medium - Google Patents

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

Info

Publication number
CN117267877A
CN117267877A CN202210675184.6A CN202210675184A CN117267877A CN 117267877 A CN117267877 A CN 117267877A CN 202210675184 A CN202210675184 A CN 202210675184A CN 117267877 A CN117267877 A CN 117267877A
Authority
CN
China
Prior art keywords
temperature
air conditioner
heat exchanger
preset
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210675184.6A
Other languages
Chinese (zh)
Inventor
王军强
李健锋
朱声浩
刘帅帅
朱天贵
李秦
周壮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
GD Midea Air Conditioning Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GD Midea Air Conditioning Equipment Co Ltd filed Critical GD Midea Air Conditioning Equipment Co Ltd
Priority to CN202210675184.6A priority Critical patent/CN117267877A/en
Publication of CN117267877A publication Critical patent/CN117267877A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/43—Defrosting; Preventing freezing of indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements

Abstract

The invention discloses a control method of an air conditioner, the air conditioner and a storage medium. Wherein the method comprises the following steps: controlling the air conditioner to perform defrosting mode to defrost a target heat exchanger, and acquiring at least two temperature characteristic parameters of the target heat exchanger, wherein different temperature characteristic parameters represent temperature states of different positions on the target heat exchanger; when the at least two temperature characteristic parameters reach preset conditions, controlling a fan corresponding to the target heat exchanger to be started; and the running pressure of the air conditioner corresponding to the preset condition is larger than a preset pressure value. The invention aims to maintain the operating pressure in the defrosting process of the air conditioner in a normal range, and improve the operating stability of the defrosting process of the air conditioner so as to improve the defrosting effect of the air conditioner.

Description

Air conditioner control method, air conditioner and storage medium
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a control method of an air conditioner, and a storage medium.
Background
When the air conditioner operates in a limiting environment, the evaporator is easy to frost, the air conditioner needs to perform defrosting operation, the evaporator is switched to a condensation state, and the frost on the surface of the evaporator is melted by heat released by condensation of a refrigerant.
At present, in the defrosting process of an air conditioner, a fan corresponding to a frosted heat exchanger is generally kept in a closed state, so that the pressure of a refrigerant system in the defrosting process is easily overhigh, the abnormal shutdown of the system is easily triggered due to high-pressure protection, and the defrosting effect of the air conditioner is influenced.
Disclosure of Invention
The invention mainly aims to provide a control method of an air conditioner, the air conditioner and a storage medium, and aims to maintain the operating pressure of the defrosting process of the air conditioner in a normal interval, improve the operating stability of the defrosting process of the air conditioner and improve the defrosting effect of the air conditioner.
In order to achieve the above object, the present invention provides a control method of an air conditioner, the control method of the air conditioner comprising the steps of:
controlling the air conditioner to perform defrosting mode to defrost a target heat exchanger, and acquiring at least two temperature characteristic parameters of the target heat exchanger, wherein different temperature characteristic parameters represent temperature states of different positions on the target heat exchanger;
when the at least two temperature characteristic parameters reach preset conditions, controlling a fan corresponding to the target heat exchanger to be started; and the running pressure of the air conditioner corresponding to the preset condition is larger than a preset pressure value.
Optionally, the step of acquiring at least two temperature characteristic parameters of the target heat exchanger includes:
acquiring a first temperature characteristic parameter of an outlet of the target heat exchanger, and acquiring a second temperature characteristic parameter of the middle part of the target heat exchanger, wherein the at least two temperature characteristic parameters comprise the first temperature characteristic parameter and the second temperature characteristic parameter.
Optionally, the first temperature characteristic parameter includes a temperature change value, the second temperature characteristic parameter includes a first temperature value, and the preset condition includes: the temperature change value is smaller than a preset change value, and the first temperature value is larger than or equal to a preset temperature threshold value;
the preset change value is a minimum temperature change value allowed by the outlet when no refrigerant deposition exists in the target heat exchanger.
Optionally, after the step of obtaining the first temperature characteristic parameter of the outlet of the target heat exchanger and obtaining the second temperature characteristic parameter of the middle part of the target heat exchanger, the method further includes:
and when the temperature change value is larger than or equal to the preset change value, or when the temperature change value is smaller than the preset change value and the first temperature value is smaller than the preset temperature threshold value, controlling the fan to be turned off.
Optionally, the first characteristic parameter further includes a second temperature value, and the preset condition further includes: the second temperature value is smaller than a preset temperature, and the preset temperature is the minimum temperature required to be reached by the outlet when the air conditioner finishes the defrosting mode.
Optionally, after the step of obtaining the first temperature characteristic parameter of the outlet of the target heat exchanger and obtaining the second temperature characteristic parameter of the middle part of the target heat exchanger, the method further includes:
and when the second temperature value is greater than or equal to the preset temperature, controlling the air conditioner to leave the defrosting mode.
Optionally, the step of controlling the opening of the fan corresponding to the target heat exchanger includes:
acquiring the exhaust pressure of a compressor of the air conditioner, the ambient temperature of the environment where the target heat exchanger is located and the heat exchanger temperature of the air conditioner;
determining a target rotational speed of the fan according to the exhaust pressure, the ambient temperature and the heat exchanger temperature;
and controlling the fan to run at the target rotating speed.
Optionally, the step of determining the target rotational speed of the fan according to the exhaust pressure, the ambient temperature, and the heat exchanger temperature includes:
determining a pressure threshold from the ambient temperature and the heat exchanger temperature;
determining a difference between the exhaust pressure and the pressure threshold;
and determining the target rotating speed according to the difference value.
In addition, in order to achieve the above object, the present application also proposes an air conditioner including: the control method comprises the steps of a memory, a processor and a control program of an air conditioner, wherein the control program of the air conditioner is stored in the memory and can run on the processor, and the control program of the air conditioner is executed by the processor to realize the control method of the air conditioner.
In addition, in order to achieve the above object, the present application further proposes a storage medium having stored thereon a control program of an air conditioner, which when executed by a processor, implements the steps of the control method of an air conditioner as set forth in any one of the above.
According to the control method of the air conditioner, provided by the invention, in the defrosting operation of the air conditioner to defrost the target heat exchanger, the temperature characteristic parameters of at least two different positions on the target heat exchanger are obtained, when the preset conditions are reached according to the at least two temperature characteristic parameters, the operation pressure of the air conditioner is larger than the preset pressure value, at the moment, the fan is started, the fan is not kept in a closed state in the defrosting process, the operation pressure of an air conditioner system can be lowered by starting the fan, so that the operation pressure of the air conditioner is effectively prevented from being too high, the operation pressure in the defrosting process of the air conditioner is ensured to be kept in a normal interval, the shutdown of the air conditioner is reduced, the operation stability in the defrosting process of the air conditioner is improved, and the defrosting effect of the air conditioner is improved.
Drawings
FIG. 1 is a schematic diagram of a hardware configuration involved in the operation of an embodiment of an air conditioner according to the present invention;
FIG. 2 is a flow chart of an embodiment of a control method of an air conditioner according to the present invention;
FIG. 3 is a flow chart of another embodiment of a control method of an air conditioner according to the present invention;
FIG. 4 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating a control method of an air conditioner according to another embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The main solutions of the embodiments of the present invention are: controlling the air conditioner to perform defrosting mode to defrost a target heat exchanger, and acquiring at least two temperature characteristic parameters of the target heat exchanger, wherein different temperature characteristic parameters represent temperature states of different positions on the target heat exchanger; when the at least two temperature characteristic parameters reach preset conditions, controlling a fan corresponding to the target heat exchanger to be started; and the running pressure of the air conditioner corresponding to the preset condition is larger than a preset pressure value.
In the prior art, in the defrosting process of an air conditioner, a fan corresponding to a frosted heat exchanger generally stops running, so that the pressure of a refrigerant system in the defrosting process is easily overhigh, and the abnormal shutdown of the system is easily triggered to cause high-pressure protection, thereby influencing the defrosting effect of the air conditioner.
The invention provides the solution, and aims to improve the running stability of the defrosting process of the air conditioner so as to improve the defrosting effect of the air conditioner.
The embodiment of the invention provides an air conditioner. The air conditioner can be any type of air conditioner such as a split air conditioner, an integrated air conditioner, a multi-split air conditioner, a mobile air conditioner and the like.
In the present embodiment, referring to fig. 1, the air conditioner includes a refrigerant circulation system including a compressor 1, a first heat exchanger, a throttle device 2, and a second heat exchanger, and a control device 100. The first heat exchanger corresponds to be provided with the first fan 3, and the first fan 3 can be used for driving air to exchange heat with the first heat exchanger, and the second heat exchanger corresponds to be provided with the second fan 4, and the second fan 4 can be used for driving air to exchange heat with the second heat exchanger.
In this embodiment, the first heat exchanger is an outdoor heat exchanger, and the second heat exchanger is an indoor heat exchanger. In other embodiments, both the first heat exchanger and the second heat exchanger may be located indoors.
When the air conditioner is in refrigeration operation, refrigerant discharged by the compressor 1 flows through the first heat exchanger, the throttling device 2 and the second heat exchanger in sequence and then flows back to the compressor 1, the first heat exchanger is in a condensation state, and the second heat exchanger is in an evaporation state. When the air conditioner heats and runs, the refrigerant discharged by the compressor 1 flows through the second heat exchanger, the throttling device 2 and the second heat exchanger in sequence and then flows back to the compressor 1, the first heat exchanger is in an evaporation state, and the second heat exchanger is in a condensation state. The air conditioner can perform heating operation or refrigerating operation during defrosting operation of the air conditioner, and the air conditioner can perform heating operation to defrost the first heat exchanger when the first heat exchanger is frosted; when the second heat exchanger frosts, the air conditioner can be operated in a refrigerating mode to defrost the second heat exchanger.
Further, referring to fig. 1, the air conditioner may further include a temperature detection module 5 connected to the control device 100, and the control device 100 may acquire data detected by the temperature detection module 5. The temperature detection module 5 is disposed on the first heat exchanger and/or the second heat exchanger. The temperature detection module 5 comprises at least two temperature sensors, the heat exchanger corresponding to the temperature detection module 5 is defined as a target heat exchanger, and different temperature sensors are arranged at different positions on the target heat exchanger. In this embodiment, one of the at least two temperature sensors is disposed at the refrigerant outlet of the target heat exchanger, and the other of the at least two temperature sensors is disposed at the middle of the coil of the target heat exchanger. The number of at least two temperature sensors may be 2, 3, 4 or more. The at least two temperature sensors may be disposed at positions other than the coil middle part and the refrigerant outlet of the target heat exchanger, for example, at the refrigerant inlet of the target heat exchanger.
In an embodiment of the present invention, referring to fig. 1, a control device 100 of an air conditioner includes: a processor 1001 (e.g., CPU), a memory 1002, a timer 1003, and the like. The components in the control device 100 are connected by a communication bus. The memory 1002 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1002 may alternatively be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the device structure shown in fig. 1 is not limiting of the device and may include more or fewer components than shown, or may be combined with certain components, or a different arrangement of components.
As shown in fig. 1, a control program of an air conditioner may be included in a memory 1002 as one type of storage medium. In the apparatus shown in fig. 1, a processor 1001 may be used to call a control program of an air conditioner stored in a memory 1002 and perform the relevant step operations of the control method of the air conditioner of the following embodiment.
The embodiment of the invention also provides a control method of the air conditioner, which is applied to the air conditioner.
Referring to fig. 2, an embodiment of a control method of the air conditioner of the present application is provided. In this embodiment, the control method of the air conditioner includes:
step S10, controlling the air conditioner to perform defrosting mode so as to defrost a target heat exchanger, and acquiring at least two temperature characteristic parameters of the target heat exchanger, wherein different temperature characteristic parameters represent temperature states of different positions on the target heat exchanger;
the target heat exchanger is a frosted heat exchanger in the air conditioner. And when the air conditioner operates in the defrosting mode, the defrosting mode is operated with the aim of melting the frost on the target heat exchanger. The air conditioner can perform refrigeration operation or heating operation in the defrosting mode, and only the temperature of the target heat exchanger can be increased. In this embodiment, the target heat exchanger is in a condensed state when the air conditioner is operating in the defrosting mode.
The temperature characteristic parameter may include a temperature value of the corresponding location in real time, a temperature change value of the corresponding location over a target period of time, or more than one temperature value of the corresponding location acquired at more than one time, etc.
At least two temperature characteristic parameters can be obtained in real time or at intervals for a preset time in the process of operating the air conditioner in a defrosting mode.
The at least two temperature characteristic parameters characterize temperature conditions of the at least two temperatures on the target heat exchanger. The at least two positions comprise at least two of the coil middle, outlet, inlet and the like of the target heat exchanger, for example, the at least two temperature characteristic parameters comprise temperature characteristic parameters respectively corresponding to the coil middle and the inlet of the target heat exchanger, the at least two temperature characteristic parameters comprise temperature characteristic parameters respectively corresponding to the outlet and the inlet of the target heat exchanger, and the at least two temperature characteristic parameters comprise temperature characteristic parameters respectively corresponding to the outlet and the coil middle of the target heat exchanger.
Step S20, when the at least two temperature characteristic parameters reach preset conditions, controlling a fan corresponding to the target heat exchanger to be started; and the running pressure of the air conditioner corresponding to the preset condition is larger than a preset pressure value.
The preset condition is specifically a condition that at least two temperature characteristic parameters need to be reached when the running pressure of the air conditioner is greater than a preset pressure value. The preset condition may specifically include a target number relationship to be reached between at least two temperature characteristic parameters, or a target size relationship to be reached between each of the at least two temperature characteristic parameters and a corresponding target parameter, or a target size relationship or a target number relationship to be reached between a temperature characterization value and a target value through calculation of the at least two temperature characteristic parameters.
The preset pressure value is specifically used for distinguishing whether the air conditioner needs to be shut down for protecting the pressure critical value. The operation pressure is larger than a preset pressure value, which indicates that the operation pressure of the air conditioner is too high, and the air conditioner needs to be stopped to avoid system damage; the running pressure is smaller than or equal to the preset pressure value, which indicates that the running pressure of the air conditioner is normal, and the air conditioner does not need to be stopped for protection.
The fan can be operated at a fixed rotating speed when being started, and can also be operated according to the rotating speed determined by the actual operating state parameters of the air conditioner.
When the defrosting mode of the air conditioner is started, the fan corresponding to the target heat exchanger can be controlled to be closed, at least two temperature characteristic parameters are detected when the fan is in a closed state, when the at least two temperature characteristic parameters reach a preset condition, the fan is controlled to be switched from the closed state to the open state, and when the at least two temperature characteristic parameters do not reach the preset condition, the fan is controlled to maintain the closed state. Or detecting at least two temperature characteristic parameters when the defrosting mode of the air conditioner is started, controlling the fan to be started when the at least two temperature characteristic parameters reach preset conditions, and controlling the fan to be closed when the at least two temperature characteristic parameters do not reach the preset conditions. And if at least two temperature characteristic parameters reach preset conditions, the fan is in an open state, and the fan can be controlled to maintain the open state or to increase the rotating speed to operate on the basis of maintaining the open state.
According to the control method of the air conditioner, which is provided by the embodiment of the invention, in the process of defrosting the air conditioner to defrost the target heat exchanger, the temperature characteristic parameters of at least two different positions on the target heat exchanger are obtained, when the temperature characteristic parameters reach the preset conditions according to at least two temperature characteristic parameters, the operation pressure of the air conditioner is larger than the preset pressure value, the fan is started at the moment, the operation pressure of an air conditioner system can be reduced by starting the fan, so that the operation pressure of the air conditioner is effectively prevented from being too high, the operation pressure of the defrosting process of the air conditioner is ensured to be maintained in a normal interval, the shutdown of the air conditioner is reduced, the operation stability of the defrosting process of the air conditioner is improved, and the defrosting effect of the air conditioner is improved.
Further, when the at least two temperature characteristic parameters do not reach preset conditions, the fan corresponding to the target heat exchanger is controlled to be turned off, so that defrosting efficiency of the target heat exchanger is improved under the condition that system pressure is ensured to be normal. After the fan corresponding to the control target heat exchanger is turned off or after the step S20, the step S10 can be executed in a return manner, so that the continuous and stable operation of the defrosting process of the air conditioner is ensured.
Further, based on the above embodiment, another embodiment of the control method of the air conditioner of the present application is provided. In this embodiment, referring to fig. 3, the step of obtaining at least two temperature characteristic parameters of the target heat exchanger includes:
step S11, obtaining a first temperature characteristic parameter of an outlet of the target heat exchanger, and obtaining a second temperature characteristic parameter of the middle part of the target heat exchanger, wherein the at least two temperature characteristic parameters comprise the first temperature characteristic parameter and the second temperature characteristic parameter.
The first temperature characteristic parameter may include a current first temperature value of the refrigerant outlet of the target heat exchanger, a temperature change value (such as a temperature change rate or a temperature change amplitude) of the refrigerant outlet of the target heat exchanger in a preset period of time, and/or more than one temperature value detected by the refrigerant outlet of the target heat exchanger at more than one moment.
The second temperature characteristic parameter may include a current first temperature value of the coil middle of the target heat exchanger, a temperature change value (e.g., a temperature change rate or a temperature change amplitude, etc.) of the coil middle of the target heat exchanger over a preset period of time, and/or more than one temperature value of the coil middle of the target heat exchanger detected at more than one time.
Based on this, the preset condition may include a target number relationship (e.g., a target difference or a target ratio) to be achieved between the first temperature characteristic parameter and the second temperature characteristic parameter, a target relationship (e.g., a number relationship or a magnitude relationship) between the first temperature characteristic parameter and the corresponding threshold, a target relationship (e.g., a number relationship or a magnitude relationship) between the second temperature characteristic parameter and the corresponding threshold, and so on.
The influence of the defrosting state of the heat exchanger on the system pressure in the defrosting process can be accurately represented by combining the first temperature characteristic parameter and the second temperature characteristic parameter, and whether the system is in a higher pressure state or not can be accurately represented based on whether the first temperature characteristic parameter and the second temperature characteristic parameter reach preset conditions or not, so that the fan is started when the first temperature characteristic parameter and the second temperature characteristic parameter reach preset conditions, the system pressure can be further ensured to be maintained to operate in a normal interval, and the system operation stability and the defrosting effect are ensured to be effectively improved.
Further, in this embodiment, the first temperature characteristic parameter includes a temperature variation value, and the second temperature characteristic parameter includes a first temperature value. The temperature change value can be specifically determined according to the first outlet temperature and the second outlet temperature by acquiring the first outlet temperature detected at the current moment and the second outlet temperature detected at the first moment before the current moment by the temperature sensor of the refrigerant outlet of the target heat exchanger. In this embodiment, the temperature change value is a temperature change rate, and may be determined according to a ratio of a temperature difference between the first outlet temperature and the second outlet temperature to a target duration, where the target duration is an interval duration between the current time and the first time. In other embodiments, the temperature change value may be a temperature change amplitude, and a temperature difference between the first outlet temperature and the second outlet temperature may be used as the temperature change value. The first temperature value is the temperature value currently detected by the temperature sensor in the middle of the target heat exchanger coil.
The preset conditions include: the temperature change value is smaller than a preset change value, and the first temperature value is larger than or equal to a preset temperature threshold value; the preset change value is a minimum temperature change value allowed by the outlet when no refrigerant deposition exists in the target heat exchanger. Based on this, referring to fig. 3, step S20 includes:
and S21, when the temperature change value is smaller than a preset change value and the first temperature value is larger than or equal to a preset temperature threshold value, controlling a fan corresponding to the target heat exchanger to be started.
When the temperature change value is smaller than the preset change value, the fact that the temperature of the outlet is slowly increased due to the fact that the refrigerant deposition exists in the target heat exchanger is indicated, at the moment, if the temperature in the middle of the target heat exchanger is too high, the condition that the system pressure is too high can be considered, at the moment, the outdoor fan is controlled to be started, the system pressure is effectively prevented from being too high, and the defrosting operation stability and the defrosting effect of the air conditioner are effectively improved.
Further, in the present embodiment, referring to fig. 3, after step S11, the method may further include:
and step S30, when the temperature change value is greater than or equal to the preset change value, or when the temperature change value is smaller than the preset change value and the first temperature value is smaller than the preset temperature threshold value, the fan is controlled to be turned off.
When the temperature change value and the first temperature value do not meet the preset conditions, the system pressure can be considered to be normal at the moment, and the fan is controlled to be closed at the moment, so that stable operation of the system is guaranteed, and meanwhile defrosting efficiency of the target heat exchanger is improved.
The order of execution between step S30 and step S21 is not particularly limited.
After step S30, the process may return to step S10, so as to ensure the running stability of the air conditioner in the defrosting process and effectively improve the defrosting effect.
In other embodiments, when the temperature change value and the first temperature value do not meet the preset conditions, the fan may be controlled to be turned on, and the rotational speed of the fan turned on is lower than the rotational speed of the fan turned on when the temperature change value and the first temperature value meet the preset conditions.
Further, based on the above embodiment, a further embodiment of the control method of the air conditioner of the present application is provided. In this embodiment, the first characteristic parameter further includes a second temperature value, where the second temperature value is specifically obtained by obtaining a temperature currently detected by a temperature sensor disposed at a refrigerant outlet of the target heat exchanger. The preset conditions further include: the second temperature value is smaller than a preset temperature, and the preset temperature is the minimum temperature required to be reached by the outlet when the air conditioner finishes the defrosting mode. That is, referring to fig. 4, step S21 includes:
step S211, when the second temperature value is smaller than a preset temperature, and when the temperature change value is smaller than a preset change value and the first temperature value is greater than or equal to a preset temperature threshold, controlling the fan corresponding to the target heat exchanger to be turned on.
When the second temperature value is smaller than the preset temperature, the target heat exchanger still has defrosting requirement, and whether the system pressure is higher or not is determined by further combining the temperature change value and the first temperature value on the basis, so that the accuracy of a judging result is improved, and the timeliness of starting the fan when the system pressure is higher is improved.
Further, in the present embodiment, referring to fig. 4, after step S11, the method further includes:
and S40, when the second temperature value is greater than or equal to the preset temperature, controlling the air conditioner to leave the defrosting mode.
The order of execution between step S40 and step S211 is not particularly limited.
When the outlet temperature of the target heat exchanger is greater than or equal to the preset temperature, the target heat exchanger can be considered to have no defrosting requirement, and the air conditioner is controlled to exit the defrosting mode at the moment, so that the air conditioner system is protected on the basis of ensuring defrosting effect even if defrosting is stopped, and the system pressure caused by frostless defrosting is prevented from being higher.
Further, based on any one of the above embodiments, a further embodiment of a control method of the air conditioner is provided. In this embodiment, referring to fig. 5, the step of controlling the opening of the fan corresponding to the target heat exchanger includes:
step S201, obtaining the exhaust pressure of a compressor of the air conditioner, the ambient temperature of the environment where the target heat exchanger is located and the heat exchanger temperature of the air conditioner;
when the target heat exchanger is arranged outdoors, the ambient temperature is the outdoor ambient temperature. When the target heat exchanger is arranged indoors, the ambient temperature is the indoor ambient temperature.
The heat exchanger temperature specifically includes the temperatures of all heat exchangers (including the target heat exchanger and other heat exchangers other than the target heat exchanger) in the air conditioner, such as the first heat exchanger temperature and the second heat exchanger temperature of the first heat exchanger described above.
The discharge pressure is detected specifically by a pressure sensor at the compressor discharge.
Step S202, determining a target rotating speed of the fan according to the exhaust pressure, the ambient temperature and the heat exchanger temperature;
the corresponding relation between the exhaust pressure, the ambient temperature, the heat exchanger temperature and the target rotating speed can be pre-established, the corresponding relation can be in the forms of a mapping relation, a calculating relation and the like, and the rotating speed corresponding to the current exhaust pressure, the ambient temperature and the heat exchanger temperature can be determined as the target rotating speed based on the corresponding relation.
In this embodiment, a pressure threshold is determined from the ambient temperature and the heat exchanger temperature; determining a difference between the exhaust pressure and the pressure threshold; and determining the target rotating speed according to the difference value. Specifically, different ambient temperatures and different heat exchanger temperatures correspond to different pressure thresholds, which may be the maximum allowed exhaust pressure. The mapping table may be calculated or queried from the ambient temperature and the heat exchanger temperature to obtain the pressure threshold herein. The pressure threshold may characterize the pressure demand of the air conditioning system when defrosting operation is stable under the current operating conditions. The difference may be a calculation of the exhaust pressure minus the pressure threshold. The target rotational speed may be positively correlated with the difference. When the difference value is smaller than a preset threshold value, the preset rotating speed can be used as a target rotating speed; when the difference is greater than the preset threshold, the second rotating speeds corresponding to the difference can be used as target rotating speeds, different difference values correspond to different second rotating speeds, and the second rotating speeds and the difference values are positively correlated.
And step S203, controlling the fan to run at the target rotating speed.
In this embodiment, the exhaust pressure, the ambient temperature and the heat exchanger temperature are combined to determine the target rotation speed at which the fan is turned on in the defrosting mode, so that the defrosting effect is improved, and meanwhile, the air conditioning system pressure can be ensured to quickly and accurately reach the normal interval state when the fan operates according to the target rotation speed, so that the operation stability of the defrosting process of the air conditioner is further improved.
In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium stores a control program of the air conditioner, and the control program of the air conditioner realizes the relevant steps of any embodiment of the control method of the air conditioner when being 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 one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (10)

1. The control method of the air conditioner is characterized by comprising the following steps of:
controlling the air conditioner to perform defrosting mode to defrost a target heat exchanger, and acquiring at least two temperature characteristic parameters of the target heat exchanger, wherein different temperature characteristic parameters represent temperature states of different positions on the target heat exchanger;
when the at least two temperature characteristic parameters reach preset conditions, controlling a fan corresponding to the target heat exchanger to be started; and the running pressure of the air conditioner corresponding to the preset condition is larger than a preset pressure value.
2. The method of controlling an air conditioner as set forth in claim 1, wherein the step of acquiring at least two temperature characteristic parameters of the target heat exchanger includes:
acquiring a first temperature characteristic parameter of an outlet of the target heat exchanger, and acquiring a second temperature characteristic parameter of the middle part of the target heat exchanger, wherein the at least two temperature characteristic parameters comprise the first temperature characteristic parameter and the second temperature characteristic parameter.
3. The control method of an air conditioner as set forth in claim 2, wherein the first temperature characteristic parameter includes a temperature variation value, the second temperature characteristic parameter includes a first temperature value, and the preset condition includes: the temperature change value is smaller than a preset change value, and the first temperature value is larger than or equal to a preset temperature threshold value;
the preset change value is a minimum temperature change value allowed by the outlet when no refrigerant deposition exists in the target heat exchanger.
4. The method for controlling an air conditioner as claimed in claim 3, wherein the step of obtaining the first temperature characteristic parameter of the outlet of the target heat exchanger and obtaining the second temperature characteristic parameter of the middle portion of the target heat exchanger further comprises, after the step of obtaining the second temperature characteristic parameter:
and when the temperature change value is larger than or equal to the preset change value, or when the temperature change value is smaller than the preset change value and the first temperature value is smaller than the preset temperature threshold value, controlling the fan to be turned off.
5. The method of controlling an air conditioner as set forth in claim 3, wherein the first characteristic parameter further includes a second temperature value, and the preset condition further includes: the second temperature value is smaller than a preset temperature, and the preset temperature is the minimum temperature required to be reached by the outlet when the air conditioner finishes the defrosting mode.
6. The method of controlling an air conditioner as set forth in claim 5, wherein after the step of obtaining the first temperature characteristic parameter of the outlet of the target heat exchanger and obtaining the second temperature characteristic parameter of the middle portion of the target heat exchanger, further comprising:
and when the second temperature value is greater than or equal to the preset temperature, controlling the air conditioner to leave the defrosting mode.
7. The method for controlling an air conditioner according to any one of claims 1 to 6, wherein the step of controlling the on of the blower corresponding to the target heat exchanger includes:
acquiring the exhaust pressure of a compressor of the air conditioner, the ambient temperature of the environment where the target heat exchanger is located and the heat exchanger temperature of the air conditioner;
determining a target rotational speed of the fan according to the exhaust pressure, the ambient temperature and the heat exchanger temperature;
and controlling the fan to run at the target rotating speed.
8. The method of controlling an air conditioner as claimed in claim 7, wherein the step of determining the target rotation speed of the blower according to the discharge pressure, the ambient temperature, and the heat exchanger temperature comprises:
determining a pressure threshold from the ambient temperature and the heat exchanger temperature;
determining a difference between the exhaust pressure and the pressure threshold;
and determining the target rotating speed according to the difference value.
9. An air conditioner, characterized in that the air conditioner comprises: a memory, a processor, and a control program of an air conditioner stored on the memory and operable on the processor, which when executed by the processor, realizes the steps of the control method of an air conditioner according to any one of claims 1 to 8.
10. A storage medium, wherein a control program of an air conditioner is stored on the storage medium, and the control program of the air conditioner, when executed by a processor, implements the steps of the control method of an air conditioner according to any one of claims 1 to 8.
CN202210675184.6A 2022-06-15 2022-06-15 Air conditioner control method, air conditioner and storage medium Pending CN117267877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210675184.6A CN117267877A (en) 2022-06-15 2022-06-15 Air conditioner control method, air conditioner and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210675184.6A CN117267877A (en) 2022-06-15 2022-06-15 Air conditioner control method, air conditioner and storage medium

Publications (1)

Publication Number Publication Date
CN117267877A true CN117267877A (en) 2023-12-22

Family

ID=89201372

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210675184.6A Pending CN117267877A (en) 2022-06-15 2022-06-15 Air conditioner control method, air conditioner and storage medium

Country Status (1)

Country Link
CN (1) CN117267877A (en)

Similar Documents

Publication Publication Date Title
CN110207314B (en) Air conditioner, air conditioner control method and device and readable storage medium
US10563877B2 (en) Air conditioner
CN109539478B (en) Air conditioner control method and device and air conditioner
CN110657563B (en) Control method and device for low-temperature heating unit and multi-split air conditioner
CN112963934B (en) Air conditioner control method and device, air conditioner and storage medium
CN108151254B (en) Air conditioner, operation control method, and computer-readable storage medium
CN110762782B (en) Low-temperature dehumidification control method and device and air conditioner
CN111457556A (en) Anti-freezing protection method and device, air conditioner and computer readable storage medium
CN111457540B (en) Outdoor fan control method and device and air conditioner
CN111306853B (en) Air conditioner defrosting method and air conditioner defrosting system for realizing continuous heating
CN110469991B (en) Control method and device for defrosting of air conditioner and air conditioner
CN112710102B (en) Four-way valve air leakage detection method, storage medium and air conditioner
CN110470000B (en) Control method and device for defrosting of air conditioner and air conditioner
CN110470009B (en) Control method and device for defrosting of air conditioner and air conditioner
CN112146233B (en) Air conditioner, air conditioner control method and device and readable storage medium
CN114791153A (en) Multi-split air conditioner and cleaning method, control device and readable storage medium thereof
CN117267877A (en) Air conditioner control method, air conditioner and storage medium
CN114076391A (en) Multi-split air conditioner, control method thereof, air conditioner control device and readable storage medium
CN111121223A (en) Fluorine-lacking protection method of air conditioner, air conditioner and storage medium
CN115247858B (en) Air conditioner, control method thereof and computer readable storage medium
CN113970174B (en) Outdoor fan control method, air conditioner, and computer-readable storage medium
CN110469998B (en) Control method and device for defrosting of air conditioner and air conditioner
CN112013502B (en) Defrosting method of air conditioner heat exchanger and air conditioner
CN112797576A (en) High-temperature refrigeration air conditioner control method
CN112594868A (en) Air conditioner and defrosting control method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination