CN112303814B - Air conditioner and air conditioner defrosting method - Google Patents
Air conditioner and air conditioner defrosting method Download PDFInfo
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- CN112303814B CN112303814B CN202011017946.0A CN202011017946A CN112303814B CN 112303814 B CN112303814 B CN 112303814B CN 202011017946 A CN202011017946 A CN 202011017946A CN 112303814 B CN112303814 B CN 112303814B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
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Abstract
The invention discloses an air conditioner and a defrosting method thereof, which are applied to the air conditioner comprising a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve and a controller, wherein the controller is configured to determine the next defrosting time based on the last defrosting period; after a preset defrosting condition is met, when the current time is more than or equal to the difference value between the next defrosting time and a first preset time and is less than or equal to the sum of the next defrosting time and a second preset time, whether a defrosting operation is executed or not is determined based on indoor user information; the last defrosting period is the time from the heating start to the defrosting start of the air conditioner; the indoor user information comprises indoor people or indoor nobody. By the air conditioner and the air conditioner defrosting method, the defrosting process is controlled according to the indoor personnel state, and the use experience of a user is improved.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an air conditioner and an air conditioner defrosting method.
Background
The air conditioner is used as a refrigerating or heating device, becomes a part of the life of people, and improves the comfort of the life of people. However, the air conditioner needs to consume more electric energy when running for a long time, and when the air conditioner runs for heating, the external machine heat exchanger frosts, and the heat exchange efficiency of the external machine heat exchanger is seriously influenced, so that the heating effect of the air conditioner is seriously influenced, and a large amount of electric energy is invisibly wasted. In order to remove frost generated on the outer unit heat exchanger during heating of the air conditioner, the outer unit heat exchanger often starts defrosting when a certain condition is satisfied. After defrosting is finished, the air conditioner can continue normal heating operation.
In the traditional defrosting mode, defrosting is started after a defrosting condition is met within a certain time. In the actual use process of a user, when the user is indoors, defrosting influences the comfort of the user.
Therefore, how to control defrosting according to the state of the user to improve the user experience is a technical problem to be solved at present.
Disclosure of Invention
The invention provides an air conditioner, which is used for solving the technical problem that defrosting can bring influence to the comfort level of a user when the user is indoors in the prior art, and comprises the following components:
the refrigerant circulation loop circulates the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator and the four-way valve;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
one of the outdoor heat exchanger and the indoor heat exchanger works for the condenser, and the other works for the evaporator;
the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between the condenser and the evaporator;
a controller configured to control the operation of the switching device,
determining the next defrosting time based on the last defrosting period;
after a preset defrosting condition is met, when the current time is more than or equal to the difference value between the next defrosting time and a first preset time and is less than or equal to the sum of the next defrosting time and a second preset time, whether a defrosting operation is executed or not is determined based on indoor user information;
the last defrosting period is the time from the heating start to the defrosting start of the air conditioner;
the indoor user information comprises indoor people or indoor nobody.
In some embodiments the controller is specifically configured to:
when the last defrosting is the first defrosting, the next defrosting time is the sum of the next heating starting time and the last defrosting period, and the last defrosting period is taken as a reference period;
when the last defrosting is not the first defrosting, the next defrosting time is half of the sum of the last defrosting period and the reference period.
In some embodiments, the controller is specifically configured to:
when the last defrosting period is smaller than a first preset period, the first preset time is a first preset value, and the second preset time is a second preset value;
when the last defrosting period is greater than or equal to a first preset period and less than or equal to a second preset period, the first preset time is a third preset value, and the second preset time is a fourth preset value;
when the last defrosting period is greater than a second preset period, the first preset time is a fifth preset value, and the second preset time is a sixth preset value;
the first preset value is smaller than a third preset value, the third preset value is smaller than a fifth preset value, the second preset value is smaller than a fourth preset value, the fourth preset value is smaller than a sixth preset value, and the first preset period is smaller than the second preset period.
In some embodiments, the controller is specifically configured to:
when a person is in the room, the current running state is kept;
and when no person is in the room, controlling the air conditioner to perform defrosting operation.
In some embodiments, the controller is further specifically configured to:
and when the current time is less than the difference value between the next defrosting time and a first preset time or more than the sum of the next defrosting time and a second preset time, controlling the air conditioner to execute defrosting operation.
Correspondingly, the invention also provides an air conditioner defrosting method, which comprises the following steps:
determining next defrosting time based on a last defrosting period, wherein the last defrosting period is the time from heating start to defrosting start of the air conditioner;
after a preset defrosting condition is met, when the current time is greater than or equal to the difference between the next defrosting time and a first preset time and is less than or equal to the sum of the next defrosting time and a second preset time, whether defrosting operation is executed or not is determined based on indoor user information, wherein the indoor user information comprises indoor people or indoor nobody.
In some embodiments, the next defrosting time is determined based on the last defrosting cycle, specifically:
when the last defrosting is the first defrosting, the next defrosting time is the sum of the next heating starting time and the last defrosting period, and the last defrosting period is taken as a reference period;
when the last defrosting is not the first defrosting, the next defrosting time is half of the sum of the last defrosting period and the reference period.
In some embodiments, further comprising:
when the last defrosting period is smaller than a first preset period, the first preset time is a first preset value, and the second preset time is a second preset value;
when the last defrosting period is greater than or equal to a first preset period and less than or equal to a second preset period, the first preset time is a third preset value, and the second preset time is a fourth preset value;
when the last defrosting period is greater than a second preset period, the first preset time is a fifth preset value, and the second preset time is a sixth preset value;
the first preset value is smaller than a third preset value, the third preset value is smaller than a fifth preset value, the second preset value is smaller than a fourth preset value, the fourth preset value is smaller than a sixth preset value, and the first preset period is smaller than the second preset period.
In some embodiments, determining whether to perform a defrosting operation based on the indoor user information specifically includes:
when a person is in the room, the current running state is kept;
and when no person is in the room, controlling the air conditioner to perform defrosting operation.
In some embodiments, further comprising:
and when the current time is less than the difference value between the next defrosting time and a first preset time or more than the sum of the next defrosting time and a second preset time, controlling the air conditioner to execute defrosting operation.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses an air conditioner and a defrosting method thereof, which are applied to the air conditioner comprising a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve and a controller, wherein the controller is configured to determine the next defrosting time based on the last defrosting period; after a preset defrosting condition is met, when the current time is more than or equal to the difference value between the next defrosting time and a first preset time and is less than or equal to the sum of the next defrosting time and a second preset time, whether a defrosting operation is executed or not is determined based on indoor user information; the last defrosting period is the time from the heating start to the defrosting start of the air conditioner; the indoor user information comprises indoor people or indoor nobody. By the air conditioner and the air conditioner defrosting method, the defrosting process is controlled according to the indoor personnel state, and the use experience of a user is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of an air conditioner defrosting method according to an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
To further describe the solution of the present application, fig. 1 shows a schematic structural diagram of an air conditioner of the present application.
The application protects an air conditioner, as shown in fig. 1, specifically is:
the refrigerant circulation circuit 101 circulates a refrigerant in a circuit including a compressor, a condenser, an expansion valve, an evaporator, and a four-way valve.
In a preferred embodiment of the present application, an air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor 102 is configured to compress a low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure refrigerant gas, and discharge the high-temperature and high-pressure refrigerant gas to the condenser.
In a preferred embodiment of the present application, the compressor compresses a refrigerant gas in a high temperature and high pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
An outdoor heat exchanger and an indoor heat exchanger 103, one of which operates as a condenser and the other of which operates as an evaporator.
In a preferred embodiment of the present application, the outdoor unit of the air conditioner includes a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and the expansion valve may be provided in either the indoor unit or the outdoor unit.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.
A four-way valve 104 for controlling the flow direction of the refrigerant in the refrigerant circuit to switch the outdoor heat exchanger and the indoor heat exchanger as a condenser and an evaporator;
a controller 105 configured to, in response to the command,
determining the next defrosting time based on the last defrosting period;
after a preset defrosting condition is met, when the current time is more than or equal to the difference value between the next defrosting time and a first preset time and is less than or equal to the sum of the next defrosting time and a second preset time, whether a defrosting operation is executed or not is determined based on indoor user information;
the last defrosting period is the time from the heating start to the defrosting start of the air conditioner;
the indoor user information comprises indoor people or indoor nobody.
In a preferred embodiment of the application, when the air conditioner performs heating operation, the controller calculates next defrosting time according to a previous defrosting period, wherein the previous defrosting period is specifically the time from the air conditioner heating to the air conditioner defrosting, after a preset defrosting condition is met, whether the current time is in an interval corresponding to the estimated next defrosting time is judged, namely whether the current time is greater than or equal to the difference between the next defrosting time and a first preset time and is less than or equal to the sum of the next defrosting time and a second preset time, if the current time falls in the interval, whether a person is in a room is further judged, and if no person is in the room, the defrosting is directly performed, so that the direct defrosting when a person is in the room is avoided, and the comfort level of the user is affected.
It should be noted that the preset defrosting condition is a condition for judging whether defrosting is performed in the existing air conditioner, and belongs to the existing technical characteristics, so that details are not repeated here.
In order to accurately determine the next defrost cycle, in some embodiments, the controller is specifically configured to:
when the last defrosting is the first defrosting, the next defrosting time is the sum of the next heating starting time and the last defrosting period, and the last defrosting period is taken as a reference period;
and when the last defrosting is not the first defrosting, the next defrosting time is the sum of half of the sum of the last defrosting period and the reference period and the time of the next heating starting.
In a preferred embodiment of the present application, a next defrosting period is determined by a last defrosting period, and when the last defrosting is the first defrosting, the next defrosting time is the sum of the time when heating is started next time and the last defrosting period, and meanwhile, if the last defrosting period is the first defrosting, the last defrosting period is taken as a reference period.
And if the last defrosting is not the first defrosting, taking the sum of half of the sum of the last defrosting period and the reference period and the time when the heating is started next time as the next defrosting time.
It should be noted that the obtaining of the next defrosting time is only one preferred embodiment of the present application, and other ways of determining the next defrosting time according to the previous defrosting cycle all belong to the protection scope of the present invention.
In order to accurately determine the time frame of the next defrosting, in a preferred embodiment of the present application, the controller is specifically configured to:
when the last defrosting period is smaller than a first preset period, the first preset time is a first preset value, and the second preset time is a second preset value;
when the last defrosting period is greater than or equal to a first preset period and less than or equal to a second preset period, the first preset time is a third preset value, and the second preset time is a fourth preset value;
when the last defrosting period is greater than a second preset period, the first preset time is a fifth preset value, and the second preset time is a sixth preset value;
the first preset value is smaller than a third preset value, the third preset value is smaller than a fifth preset value, the second preset value is smaller than a fourth preset value, the fourth preset value is smaller than a sixth preset value, and the first preset period is smaller than the second preset period.
In a preferred embodiment of the present application, the first preset value and the second preset value may be adjusted according to the size of the first preset period and the second preset period, so as to ensure that the interval of the estimated next defrosting time is accurate, specifically, when the last defrosting period is less than the first preset period, the first preset time is the first preset value, and the second preset time is the second preset value; when the last defrosting period is greater than or equal to a first preset period and less than or equal to a second preset period, the first preset time is a third preset value, and the second preset time is a fourth preset value; when the last defrosting period is greater than a second preset period, the first preset time is a fifth preset value, the second preset time is a sixth preset value, it should be noted that the first preset value is smaller than the third preset value, the third preset value is smaller than the fifth preset value, the second preset value is smaller than the fourth preset value, the fourth preset value is smaller than the sixth preset value, and the first preset period is smaller than the second preset period.
It should be noted that the size of the preset value can be flexibly adjusted according to practical applications, and the different sizes of the preset value do not affect the protection scope of the present application.
To improve the comfort of the user, in some embodiments, the controller is specifically configured to:
when a person is in the room, the current running state is kept;
and when no person is in the room, controlling the air conditioner to perform defrosting operation.
In the preferred embodiment of the present application, because defrosting when the user is indoors brings a bad use experience to the user, in the preferred embodiment of the present application, defrosting is directly performed by detecting whether the user is indoors, if the user is not indoors, and if the user is indoors, the air conditioner is controlled to continue to operate according to the original operation mode, thereby improving the use experience of the user.
Whether the user is indoors is detected through various modes such as infrared detection, camera detection and sound detection, and the difference of the detection modes does not affect the protection scope of the application.
To ensure defrosting of the air conditioner, in some embodiments, the controller is further specifically configured to:
and when the current time is less than the difference value between the next defrosting time and a first preset time or more than the sum of the next defrosting time and a second preset time, controlling the air conditioner to execute defrosting operation.
In a preferred embodiment of the present application, after a preset defrosting condition is met, if the current time is less than a difference between the next defrosting time and a first preset time or greater than a sum of the next defrosting time and a second preset time, that is, the current time does not reach an estimated time interval, the air conditioner is directly defrosted.
The invention discloses an air conditioner, which comprises a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve and a controller, wherein the controller is configured to determine the next defrosting time based on the last defrosting period; when the current time is more than or equal to the difference value between the next defrosting time and a first preset time and is less than or equal to the sum of the next defrosting time and a second preset time, determining whether to execute defrosting operation based on indoor user information; the last defrosting period is the time from the heating start to the defrosting start of the air conditioner; the indoor user information comprises indoor people or indoor nobody. By the air conditioner and the air conditioner defrosting method, the defrosting process is controlled according to the indoor personnel state, and the use experience of a user is improved.
Based on the air conditioner, the application also provides an air conditioner defrosting method, as shown in fig. 2, the method is applied to the air conditioner comprising a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve and a controller, and the method comprises the following steps:
step S201, determining next defrosting time based on a last defrosting period, wherein the last defrosting period is the time from heating start to defrosting start of the air conditioner.
In a preferred embodiment of the present application, when the air conditioner performs heating operation, the controller calculates a next defrosting time according to a last defrosting period, specifically, a time from when the air conditioner starts heating to when defrosting starts.
In order to accurately obtain the next defrosting time, in some embodiments, the next defrosting time is determined based on the last defrosting cycle, specifically:
when the last defrosting is the first defrosting, the next defrosting time is the sum of the next heating starting time and the last defrosting period, and the last defrosting period is taken as a reference period;
when the last defrosting is not the first defrosting, the next defrosting time is half of the sum of the last defrosting period and the reference period.
For example, the air conditioner 8:00 starts heating operation, meets defrosting conditions after 1 hour of operation, and enters defrosting for the first time (9:00), the last defrosting period T is 1h, and the reference period T0 is 1 h. The defrosting time is 10 minutes, the next heating starting time is 9:10, and the next defrosting time t0 is calculated to be 9:10+1h which is 10: 10.
When the last defrosting period is not the first defrosting, the air conditioner 6:00 starts heating operation, the defrosting condition is met after the air conditioner operates for 1 hour, the first defrosting period is 7:00, and the reference period T0 is 60 minutes. Heating (8:25) is started after the last defrosting is finished till the defrosting start time (9:35), and the last defrosting period T is 70 minutes. And 9:45, after defrosting is finished, heating operation is started again. (70 min +60 min)/2: 65 min, the next defrosting time t0 is calculated to be 9:40+65 min: 10: 45.
Step S202, when the current time is greater than or equal to the difference between the next defrosting time and a first preset time and is less than or equal to the sum of the next defrosting time and a second preset time, whether defrosting operation is executed or not is determined based on indoor user information, and the indoor user information comprises indoor people or indoor no people.
In the preferred embodiment of the application, after the preset defrosting condition is met, whether the current time is in an interval corresponding to the estimated next defrosting time is judged, namely whether the current time is more than or equal to the difference between the next defrosting time and the first preset time and is less than or equal to the sum of the next defrosting time and the second preset time is judged, if the current time falls into the interval, whether a person is in the room is further judged, if no person is in the room, defrosting is directly carried out, and the condition that direct defrosting is carried out when a person is in the room is avoided, so that the comfort level of a user is influenced.
In order to accurately determine the time frame of the next defrosting, in a preferred embodiment of the present application, the method further comprises:
when the last defrosting period is smaller than a first preset period, the first preset time is a first preset value, and the second preset time is a second preset value;
when the last defrosting period is greater than or equal to a first preset period and less than or equal to a second preset period, the first preset time is a third preset value, and the second preset time is a fourth preset value;
when the last defrosting period is greater than a second preset period, the first preset time is a fifth preset value, and the second preset time is a sixth preset value;
the first preset value is smaller than a third preset value, the third preset value is smaller than a fifth preset value, the second preset value is smaller than a fourth preset value, the fourth preset value is smaller than a sixth preset value, and the first preset period is smaller than the second preset period.
In order to control defrosting according to the indoor user information, in some embodiments, whether to perform a defrosting operation is determined based on the indoor user information, specifically:
when a person is in the room, the current running state is kept;
and when no person is in the room, controlling the air conditioner to perform defrosting operation.
In order to ensure defrosting of the air conditioner, in some embodiments, the air conditioner further comprises:
and when the current time is less than the difference value between the next defrosting time and a first preset time or more than the sum of the next defrosting time and a second preset time, controlling the air conditioner to execute defrosting operation.
In a preferred embodiment of the present application, after a preset defrosting condition is satisfied, if the current time is less than a difference between the next defrosting time and a first preset time or greater than a sum of the next defrosting time and a second preset time, the air conditioner is directly defrosted.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (4)
1. An air conditioner characterized by comprising:
the refrigerant circulation loop circulates the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator and the four-way valve;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the heat exchangers operates as a condenser and the other operates as an evaporator;
the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between the condenser and the evaporator;
a controller configured to control the operation of the switching device,
determining the next defrosting time based on the last defrosting period;
after a preset defrosting condition is met, when the current time is more than or equal to the difference value between the next defrosting time and a first preset time and is less than or equal to the sum of the next defrosting time and a second preset time, whether a defrosting operation is executed or not is determined based on indoor user information;
the last defrosting period is the time from the heating start to the defrosting start of the air conditioner;
the indoor user information comprises indoor people or indoor nobody;
wherein the controller is specifically configured to:
when the last defrosting is the first defrosting, the next defrosting time is the sum of the next heating starting time and the last defrosting period, and the last defrosting period is taken as a reference period;
when the last defrosting is not the first defrosting, the next defrosting time is the sum of half of the sum of the last defrosting period and the reference period and the time when the heating is started next time;
when a person is in the room, the current running state is kept;
when no person is in the room, controlling the air conditioner to execute defrosting operation;
the controller is further specifically configured to:
and when the current time is less than the difference value between the next defrosting time and a first preset time or more than the sum of the next defrosting time and a second preset time, controlling the air conditioner to execute defrosting operation.
2. The air conditioner of claim 1, wherein the controller is specifically configured to:
when the last defrosting period is smaller than a first preset period, the first preset time is a first preset value, and the second preset time is a second preset value;
when the last defrosting period is greater than or equal to a first preset period and less than or equal to a second preset period, the first preset time is a third preset value, and the second preset time is a fourth preset value;
when the last defrosting period is greater than a second preset period, the first preset time is a fifth preset value, and the second preset time is a sixth preset value;
the first preset value is smaller than a third preset value, the third preset value is smaller than a fifth preset value, the second preset value is smaller than a fourth preset value, the fourth preset value is smaller than a sixth preset value, and the first preset period is smaller than the second preset period.
3. The defrosting method of the air conditioner is characterized by being applied to the air conditioner comprising a refrigerant circulating loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve and a controller, and comprising the following steps:
determining next defrosting time based on a last defrosting period, wherein the last defrosting period is the time from heating start to defrosting start of the air conditioner;
after a preset defrosting condition is met, when the current time is more than or equal to the difference value between the next defrosting time and a first preset time and is less than or equal to the sum of the next defrosting time and a second preset time, determining whether a defrosting operation is executed or not based on indoor user information, wherein the indoor user information comprises indoor people or indoor nobody;
wherein, the next defrosting time is determined based on the last defrosting cycle, and the method specifically comprises the following steps:
when the last defrosting is the first defrosting, the next defrosting time is the sum of the next heating starting time and the last defrosting period, and the last defrosting period is taken as a reference period;
when the last defrosting is not the first defrosting, the next defrosting time is half of the sum of the last defrosting period and the reference period;
the method comprises the following steps of determining whether to execute defrosting operation based on indoor user information, specifically:
when a person is in the room, the current running state is kept;
when no person is in the room, controlling the air conditioner to execute defrosting operation;
wherein, the method further comprises:
and when the current time is less than the difference value between the next defrosting time and a first preset time or more than the sum of the next defrosting time and a second preset time, controlling the air conditioner to execute defrosting operation.
4. The method of claim 3, further comprising:
when the last defrosting period is smaller than a first preset period, the first preset time is a first preset value, and the second preset time is a second preset value;
when the last defrosting period is greater than or equal to a first preset period and less than or equal to a second preset period, the first preset time is a third preset value, and the second preset time is a fourth preset value;
when the last defrosting period is greater than a second preset period, the first preset time is a fifth preset value, and the second preset time is a sixth preset value;
the first preset value is smaller than a third preset value, the third preset value is smaller than a fifth preset value, the second preset value is smaller than a fourth preset value, the fourth preset value is smaller than a sixth preset value, and the first preset period is smaller than the second preset period.
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| CN202011017946.0A CN112303814B (en) | 2020-09-24 | 2020-09-24 | Air conditioner and air conditioner defrosting method |
| PCT/CN2021/103100 WO2022062530A1 (en) | 2020-09-24 | 2021-06-29 | Air conditioner and air conditioner defrost method |
| CN202180063395.8A CN116194719A (en) | 2020-09-24 | 2021-06-29 | Air conditioner and defrosting method thereof |
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| CN202011017946.0A CN112303814B (en) | 2020-09-24 | 2020-09-24 | Air conditioner and air conditioner defrosting method |
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| JP5435069B2 (en) * | 2012-05-01 | 2014-03-05 | ダイキン工業株式会社 | Air conditioning system and defrosting operation method |
| CN103411290B (en) * | 2013-08-30 | 2016-04-06 | 海信（山东）空调有限公司 | Air-conditioner and defrosting control method thereof |
| JP2015183898A (en) * | 2014-03-24 | 2015-10-22 | 日立アプライアンス株式会社 | air conditioner |
| CN110567100B (en) * | 2019-09-04 | 2021-06-04 | 青岛海信日立空调系统有限公司 | Multi-split air conditioner defrosting control method and multi-split air conditioner |
| CN111238121B (en) * | 2020-01-19 | 2021-07-06 | 珠海格力电器股份有限公司 | Refrigeration equipment and defrosting control method and device thereof |
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