Control method and control device of air conditioner, and air conditioner

Abstract

The present application relates to air conditioner technical field, especially to a kind of air conditioner control method, control device and air conditioner, air conditioner control method includes: obtaining current time, according to current time and the weather time period distribution information of pre-acquired current weather time period;Wherein, weather time period distribution information includes: frost risk time period and non-frost risk time period;When the current weather time period is frost risk time period, first heating signal for controlling heating assembly to run in first mode is sent;When the current weather time period is non-frost risk time period, second heating signal for controlling heating assembly to run in second mode is sent, and the average heating power of second mode is less than the average heating power of first mode.Air conditioner runs, based on the weather time period corresponding to current time corresponding heating mode is taken, can avoid the frost of outdoor unit heat exchanger, avoid interfering with the normal operation of indoor unit, reduce the fluctuation of indoor temperature.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an air conditioner control method, control device, and air conditioner. Background Technology

[0002] In cold weather, after an air conditioner runs in heating mode for a period of time, frost will form on the surface of the outdoor unit's heat exchanger due to the low temperature of the outdoor unit's coil and the influence of outdoor ambient temperature and humidity. This frost significantly affects the heat exchange efficiency of the outdoor unit's heat exchanger. Furthermore, in areas with high humidity or frequent rain and snow, a large amount of ice or ice clumps may accumulate on the outdoor unit's protective mesh or sheet metal parts, affecting the reliability of the unit's operation. Related technologies employ a four-way valve reversing defrosting method, which discharges hot air from the compressor into the outdoor heat exchanger. The high-temperature refrigerant then releases heat in the heat exchanger, thus cleaning the frost layer on the surface of the outdoor unit's heat exchanger. However, this method has certain drawbacks. When the air conditioner is running in defrosting mode, the indoor unit will blow cold air or be in anti-cold air mode for an extended period, affecting user comfort. Moreover, the moment the four-way valve reverses, the refrigerant flow changes, causing high-pressure and low-pressure refrigerant to cross-flow, generating violent vibrations and affecting the reliability of the unit. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in related technologies. To this end, this invention proposes a control method for an air conditioner that controls the heating components to operate in different modes during different weather periods. This effectively prevents frost formation on the outdoor unit's heat exchanger and avoids interfering with the normal operation of the indoor unit, thereby improving user comfort.

[0004] The present invention also provides a control device for an air conditioner.

[0005] The present invention also provides an air conditioner.

[0006] A control method for an air conditioner according to a first aspect embodiment of the present invention includes:

[0007] The current time is obtained, and the current weather period is determined based on the current time and pre-acquired weather period distribution information; wherein, the weather period distribution information includes: frost risk period and non-frost risk period;

[0008] When the current weather period is a period of frost risk, a first heating signal is issued to control the heating components to operate in a first mode;

[0009] When the current weather period is a non-frost risk period, a second heating signal is issued to control the heating components to operate in a second mode, wherein the average heating power of the second mode is less than the average heating power of the first mode.

[0010] According to an embodiment of the present invention, the weather time distribution information is obtained through the following steps:

[0011] The geographical location of the air conditioner is obtained, and the corresponding historical weather information is obtained based on the geographical location. The historical weather information includes at least historical humidity information, historical temperature information, and historical rain and snow date information.

[0012] The weather time period distribution information is obtained based on the historical humidity information, the historical temperature information, and the historical rain and snow date information.

[0013] According to one embodiment of the present invention, the first heating signal is used to activate the heating component to maintain the heat exchanger of the outdoor unit at a first temperature.

[0014] According to one embodiment of the present invention, the second heating signal is used to keep the heating component working continuously to maintain the heat exchanger of the outdoor unit at a second temperature, which is lower than the first temperature;

[0015] Alternatively, the second heating signal is used to cause the heating component to operate for a second preset time interval at a first preset time interval, so as to maintain the average temperature of the heat exchanger of the outdoor unit at a third temperature, which is lower than the first temperature.

[0016] According to one embodiment of the present invention, the step of determining the current weather period further includes:

[0017] When the current time falls within a third preset time period before the frost risk period, the frost risk value is obtained once every fourth preset time period;

[0018] When the difference between the frost risk values ​​at adjacent time points is greater than or equal to zero, the second heating signal is sent;

[0019] If the difference between the frosting risk values ​​at adjacent times is less than zero, a third heating signal is issued to control the heating component to operate in a third mode; wherein the average heating power of the third mode is linearly adjusted from the average heating power of the second mode to the average heating power of the first mode.

[0020] According to an embodiment of the present invention, the step of obtaining a frost risk value every fourth preset time interval specifically includes:

[0021] At each of the fourth preset time intervals, a first coefficient corresponding to historical humidity information and historical temperature information, and a second coefficient corresponding to historical temperature information and historical rain and snow date information are obtained;

[0022] Obtain the pre-stored frost risk correspondence, and determine the frost risk value based on the first coefficient, the second coefficient, and the frost risk correspondence.

[0023] According to one embodiment of the present invention, the method further includes:

[0024] Obtain the frost thickness at the outdoor unit;

[0025] When the current weather period is a period of high risk of frost, and the frost layer thickness is greater than or equal to a preset thickness, a fourth heating signal is issued to control the heating component to operate in a fourth mode, wherein the average heating power of the fourth mode is greater than the average heating power of the first mode.

[0026] According to one embodiment of the present invention, the method further includes:

[0027] When the thickness of the frost layer is less than the preset thickness, the first heating signal is emitted.

[0028] According to a second aspect embodiment of the present invention, a control device for an air conditioner includes:

[0029] The acquisition module is used to acquire the current time and determine the current weather period based on the current time and pre-acquired weather period distribution information; wherein, the weather period distribution information includes: frost risk periods and non-frost risk periods;

[0030] The signal transmitting module sends a first heating signal to control the heating component to operate in a first mode when the current weather period is a frost risk period; and sends a second heating signal to control the heating component to operate in a second mode when the current weather period is not a frost risk period, wherein the average heating power of the second mode is less than the average heating power of the first mode.

[0031] An air conditioner according to a third aspect of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the control method for the air conditioner according to a first aspect of the present invention.

[0032] The above-described one or more technical solutions of this invention have at least one of the following technical effects:

[0033] The air conditioner control method according to an embodiment of the present invention includes the following steps: acquiring the current time; determining the current weather period based on the current time and pre-acquired weather period distribution information; wherein the weather period distribution information includes: frosting risk periods and non-frosting risk periods; when the current weather period is a frosting risk period, issuing a first heating signal to control the heating component to operate in a first mode; when the current weather period is a non-frosting risk period, issuing a second heating signal to control the heating component to operate in a second mode, wherein the average heating power of the second mode is less than the average heating power of the first mode. When the air conditioner is running, corresponding heating measures are taken based on the weather period corresponding to the current time. Controlling the heating component to operate in the first mode during the frosting risk period can prevent frost formation on the outdoor unit's heat exchanger or promptly eliminate rain and snow accumulation at the outdoor unit; controlling the heating component to operate in the second mode during the non-frosting risk period can prevent frost formation on the outdoor unit, and the energy consumption is lower at this time, which is beneficial for energy saving. The air conditioner does not need to switch between cooling and heating modes during defrosting, which can avoid interfering with the normal operation of the indoor unit, reduce indoor temperature fluctuations, and improve user comfort. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is one of the flowcharts for the control method of an air conditioner provided in an embodiment of the present invention;

[0036] Figure 2 A second flowchart of the air conditioner control method provided in an embodiment of the present invention;

[0037] Figure 3 The third flowchart of the air conditioner control method provided in the embodiments of the present invention;

[0038] Figure 4 The fourth flowchart of the air conditioner control method provided in the embodiments of the present invention;

[0039] Figure 5 A schematic structural diagram of the control device for an air conditioner provided in an embodiment of the present invention.

[0040] Figure label:

[0041] 501. Acquisition module; 502. Signal transmission module. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the invention clearer, the technical solutions of the invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0045] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] In related technologies, a four-way valve reversing defrosting method is used. Hot air from the compressor is discharged into the outdoor heat exchanger, where the high-temperature refrigerant releases heat, thus cleaning the frost layer on the surface of the outdoor unit's heat exchanger. However, this method has certain drawbacks. When the air conditioner is running in defrost mode, the indoor unit will blow cold air or be in anti-cold air mode for an extended period, affecting user comfort. Furthermore, the moment the four-way valve reverses, the refrigerant flow changes, causing high-pressure and low-pressure refrigerant to cross-contaminate, resulting in severe vibrations and affecting the unit's reliability.

[0048] The air conditioner provided in this embodiment of the invention includes an indoor unit and an outdoor unit, which are connected by pipes. The outdoor unit is mounted on the outside of a wall or platform using an air conditioner bracket. The outdoor unit can be a multi-split air conditioner. A heating component is provided at the heat exchanger of the outdoor unit. The heating component can be an electric heating wire, an electric heating plate, etc., wherein the electric heating wire can be wound around the column of the outdoor unit or around the outside of the coil of the outdoor unit's heat exchanger. Adjusting the operating voltage / current and operating time of the heating component can raise the temperature of the outdoor unit's heat exchanger, which helps with defrosting the outdoor unit's heat exchanger. The heating component can receive heating signals from its controller and operate according to the heating signals.

[0049] In some cases, the heating element is assembled with other components of the outdoor unit and is manufactured as part of the outdoor unit. The heating element operates when it receives a heating signal.

[0050] In other cases, the heating element is a separate product. In cold and humid areas, the outdoor unit is prone to frost and ice buildup. Users can purchase and install heating elements as needed. The heating element starts working after a signal connection is established between it and the air conditioner.

[0051] According to a first aspect embodiment of the present invention, a control method for an air conditioner includes the following:

[0052] Obtain the current time and determine the current weather period based on the current time and the pre-obtained weather period distribution information; the weather period distribution information includes: frost risk period and non-frost risk period.

[0053] When the current weather period is a period of high risk of frost, a first heating signal is issued to control the heating components to operate in a first mode.

[0054] When the current weather period is a non-frost risk period, a second heating signal is issued to control the heating components to operate in a second mode, the average heating power of the second mode being less than the average heating power of the first mode.

[0055] The above control method proposes a preventative control method based on the frost risk of the current weather period to achieve heating defrosting. Please refer to [link / reference needed]. Figure 1 This includes the following steps:

[0056] S100, Get the current time.

[0057] Understandably, an air conditioner can be equipped with a timing module that displays the current time and can be corrected each time it connects to the network. Secondly, the air conditioner can also directly obtain the current time information via network signal. The current time should be specific to the hour, for example, 07:00 on January 11, 2023.

[0058] S110. Determine whether the current weather period is a period of frost risk based on the current time and the pre-acquired weather period distribution information.

[0059] In step S110, the weather time distribution information includes periods of frost risk and periods of non-frost risk. For example, based on a comprehensive consideration of local historical temperature, humidity, and rain / snow weather, periods when the outdoor unit of the air conditioner is prone to frost, ice, or snow accumulation are identified as periods of frost risk, while periods when the outdoor unit is unlikely to experience frost, ice, or snow accumulation are identified as periods of non-frost risk. The current time is obtained and compared with the pre-obtained weather time distribution information. For example, if the current time is 18:00 on January 12, 2023, which is winter in the Northern Hemisphere, combined with local humidity and temperature factors, the current weather time can be identified as a period of frost risk. If the current time is 12:00 on November 16, 2023, the overall temperature is dropping, presenting some frost risk, but the frost risk is not significant, and the current weather time can be identified as a period of non-frost risk. Step S120 is executed when the current weather time is identified as a period of frost risk, and step S130 is executed when the current weather time is identified as a period of non-frost risk.

[0060] S120, Issue a first heating signal to control the heating assembly to operate in a first mode.

[0061] In step S120, during a period of high risk of frost formation in the current weather, a first heating signal is generated to control the heating component to operate in a first mode. Upon receiving the first heating signal, the heating component begins operation. At this time, the average heating power of the heating component is greater than or equal to the efficiency of heat exchange between the outdoor heat exchanger and the outside environment. This allows the air temperature near the outdoor heat exchanger to gradually rise or stabilize after reaching a specific temperature. This eliminates the frost layer that has condensed on the outdoor heat exchanger and maintains the outdoor heat exchanger at a specific temperature, preventing frost formation.

[0062] S130, A second heating signal is issued to control the heating component to operate in a second mode, wherein the average heating power of the second mode is less than the average heating power of the first mode.

[0063] In step S130, when the weather period is determined to be a non-frost-risk period, a second heating signal is generated to control the heating component to operate in a second mode. Upon receiving the second heating signal, the heating component begins operation, raising the air temperature near the outdoor unit's heat exchanger above the theoretical frosting temperature (determined based on humidity and temperature). This prevents frosting of the outdoor unit's heat exchanger, thus maintaining efficient operation of the air conditioner. It should be noted that during non-frost-risk periods, the purpose of the heating component operating in second mode is to prevent frosting of the outdoor unit's heat exchanger, and since the external ambient temperature and humidity have not yet reached the level required for frosting, the average heating power in second mode is lower than that in first mode, achieving energy savings.

[0064] When the air conditioner is running, it takes corresponding heating measures based on the weather conditions at the current time. During periods of high risk of frost, the heating element operates in the first mode to prevent frost from forming on the outdoor unit's heat exchanger or to promptly remove rain and snow accumulation at the outdoor unit. During periods of low risk of frost, the heating element operates in the second mode to prevent frost formation on the outdoor unit, and energy consumption is lower at this time, which helps save energy. The air conditioner does not need to switch between cooling and heating modes during defrosting, which avoids interfering with the normal operation of the indoor unit, reduces indoor temperature fluctuations, and improves user comfort.

[0065] In some embodiments, weather time-period distribution information is obtained through the following steps:

[0066] Obtain the geographical location of the air conditioner and retrieve the corresponding historical weather information from the historical weather database based on the geographical location. The historical weather information includes at least historical humidity information, historical temperature information, and historical rain and snow date information.

[0067] Weather time period distribution information is obtained based on historical humidity information, historical temperature information, and historical rain and snow date information.

[0068] When obtaining the geographical location of the target air conditioner, it can be manually entered by the user upon first use, or a positioning module can be set up inside the air conditioner. When the air conditioner is connected to the network, the positioning module will automatically obtain the current geographical location. Different regions have historical weather information records and storage, and the air conditioner can read the relevant historical weather database when connected to the network; alternatively, the air conditioner has a storage module that updates the historical weather database in the storage module every time the air conditioner is connected to the network, and retrieves the historical weather information corresponding to the geographical location in a timely manner when in use.

[0069] Based on the impact of humidity, temperature, and rain / snow on frosting, periods where historical humidity, temperature, and rain / snow dates meet frosting conditions (including icing and snow accumulation) are classified as frosting risk periods, while periods where these conditions are not met are classified as non-frosting risk periods. Based on historical humidity and temperature information, the theoretical frosting temperature corresponding to those historical values ​​can be determined. This theoretical frosting temperature changes over different time periods; plotting time on the x-axis and the theoretical frosting temperature on the y-axis will create a curve that fluctuates over time. If the outdoor unit coil operating temperature in heating mode is lower than the theoretical frosting temperature (i.e., the period below the curve), it is considered a frosting risk period; if the operating temperature is above the curve, it is considered a non-frosting risk period.

[0070] At the same time, when the historical temperature is below a certain temperature threshold, such as below 0 degrees Celsius, and the time period is a historical rain and snow period, priority is given to the situation of outdoor unit heat exchanger icing and snow accumulation, and this time period is corrected to the period of frost risk.

[0071] By taking the union of the frost risk periods obtained from the two division methods above, we can obtain the complete frost risk periods and non-frost risk periods.

[0072] When the current time is in different weather conditions, steps S120 and S130 are executed respectively.

[0073] In some embodiments, a first heating signal is used to activate the heating components to maintain the heat exchanger of the outdoor unit at a first temperature.

[0074] Understandably, the purpose of the first mode of air conditioner operation is to melt the frost, ice or snow that has already appeared on the outdoor heat exchanger, and to further prevent the outdoor heat exchanger from frosting during periods of high risk of frosting in harsh environments. Therefore, the first heating signal is at least used to make the heating components work to keep the outdoor heat exchanger at a first temperature, which is higher than the theoretical frosting temperature. That is, under the first heating signal, the outdoor heat exchanger can defrost and prevent further frosting.

[0075] In some embodiments, the second heating signal is used to keep the heating component working continuously to maintain the heat exchanger of the outdoor unit at a second temperature; wherein the second temperature is lower than the first temperature.

[0076] Understandably, during periods without the risk of frost buildup, the purpose of the heating element operating in the second mode is to prevent frost formation on the outdoor unit's heat exchanger. Since the external ambient temperature and humidity have not yet reached the level required for frost formation, the average heating power in the second mode is lower than that in the first mode, achieving energy savings. The second heating signal allows the heating element to operate continuously, meaning it runs at a lower heating power, keeping the outdoor unit's heat exchanger at a second temperature. This second temperature is lower than the first temperature but higher than the theoretical frost temperature, which corresponds to the frost temperature at that historical humidity and temperature.

[0077] In some embodiments, the second heating signal is used to cause the heating component to operate for a second preset time interval at a first preset time interval, so as to maintain the average temperature of the heat exchanger of the outdoor unit at a third temperature, which is lower than the first temperature.

[0078] Understandably, during periods without the risk of frost buildup, the purpose of the heating element operating in the second mode is to prevent frost formation on the outdoor unit's heat exchanger, provided that the external ambient temperature and humidity have not yet reached the level required for frost formation. Based on the second heating signal determined by the second mode, the heating element operates for a second preset time interval at first preset intervals, for example, 0.5 hours every 2 hours. This means the second heating signal is a periodic fluctuation signal. As the heating signal fluctuates, the operating power of the heating element also fluctuates, and the temperature of the outdoor unit's heat exchanger cycles between high and low temperatures. At this time, the average temperature of the outdoor unit's heat exchanger is at a third temperature, which is lower than the first temperature. In this mode, the high-temperature phase helps melt any frost, ice, or snow that may occasionally appear, while the low-temperature phase reduces energy consumption, and the average temperature is maintained at the third temperature without increasing the overall energy consumption of the heating element.

[0079] It should be noted that both the first and second preset durations can be adjusted. For example, it can work for 0.5 hours every 2 hours, or for 3 hours every 3 hours, or for 3 hours every 2 hours.

[0080] In some cases, even if the current time is within a non-frosting risk period but is close to a frosting risk period, the ratio of the first preset duration to the second preset duration can be adjusted based on the time difference between the current time and the start time of the frosting risk period. The closer the current time is to the start time of the frosting risk period, the larger the ratio of the second preset duration to the first preset duration. That is, as the frosting risk increases, the running time of the heating element increases and the interval duration decreases.

[0081] In some embodiments, the step of determining the current weather period further includes:

[0082] Within the third preset time period before the current time is in the frost risk period, the frost risk value is obtained once every fourth preset time period.

[0083] The second heating signal is sent when the difference in the risk of frost between adjacent time points is greater than or equal to zero.

[0084] If the difference in the risk of frosting at adjacent times is less than zero, a third heating signal is issued to control the heating component to operate in a third mode; wherein the average heating power of the third mode is linearly adjusted from the average heating power of the second mode to the average heating power of the first mode.

[0085] It should be noted that the non-frost-risk periods mentioned above do not refer to all other times outside the frost-risk period, but rather to the time periods when the outdoor unit's heat exchanger operating temperature is higher than the theoretical frost temperature, but the difference is within 0 to 2 degrees Celsius. Although there is no frost during these periods, the possibility of frost formation still exists. With slight environmental changes, there is a possibility that these periods may transition into frost-risk periods.

[0086] The above control method provides a control approach for the transition from a non-frost-risk period to a frost-risk period. It allows for real-time adjustment of the heating element's operating mode to adapt to changes in the external environment. Please refer to [link / reference needed]. Figure 2 Specifically, it includes the following steps:

[0087] S200, Get the current time.

[0088] Understandably, an air conditioner can be equipped with a timing module that can record the current time and correct the time each time it connects to the network; secondly, the air conditioner can also directly obtain the current time information through the network signal.

[0089] S210. Determine whether the current time is within a period of risk of frost formation.

[0090] If the current weather period is determined to be a period of frost risk, proceed to step S220; if the current weather period is determined to be a period of no frost risk, proceed to step S230.

[0091] S220, Issue a first heating signal to control the heating assembly to operate in a first mode.

[0092] In step S220, during a period of high risk of frost formation in the current weather, a first heating signal is generated to control the heating component to operate in a first mode. Upon receiving the first heating signal, the heating component begins operation. At this time, the average heating power of the heating component is greater than or equal to the efficiency of heat exchange between the outdoor heat exchanger and the outside environment. This allows the air temperature near the outdoor heat exchanger to gradually rise or stabilize after reaching a specific temperature. This eliminates the frost layer that has condensed on the outdoor heat exchanger and maintains the outdoor heat exchanger at a specific temperature, preventing frost formation.

[0093] S230. Determine whether the current time is within the third preset time period before the frost risk period.

[0094] Understandably, during the transition from a non-frost-risk period to a frost-risk period, the outdoor environment may suddenly or gradually deteriorate, increasing the risk of frost formation. If the heating components cannot adjust or adapt to changes in the external environment in a timely manner during this phase, frost may form on the outdoor unit's heat exchanger. Step S250 is executed if the current time falls within the third preset time period preceding the frost-risk period; step S240 is executed if the current time does not fall within the third preset time period preceding the frost-risk period.

[0095] S240, Issue a second heating signal to control the heating assembly to operate in a second mode.

[0096] Understandably, if the current moment is not within the third preset time period before the frost risk period, the current moment has not reached the transition period, so the heating component can operate normally in the second mode.

[0097] S250. Determine if there is an already acquired frost risk value.

[0098] Understandably, if the current moment falls within the third preset time period before the frost risk period, the current moment has already entered the transition period, and the operating mode of the heating component needs to be adjusted in a timely manner. To determine the change in the frost risk value within the third preset time period, it is necessary to determine whether there is already an acquired frost risk value. Only two consecutive frost risk values ​​can reflect the changing trend of the frost risk. If they exist, proceed to step S270; otherwise, proceed to step S260.

[0099] S260. Obtain the frost risk value corresponding to the current moment, store the frost risk value and record the corresponding moment, and at the same time send out a second heating signal.

[0100] In step S260, if there is no frost risk value within the third preset time period before the current moment first enters the frost risk period, then the first frost risk value is obtained as the basis for subsequent steps.

[0101] S270. Determine whether the time difference between the current moment and the moment when the frost risk value was last obtained is greater than or equal to the fourth preset duration.

[0102] It is understandable that if the current time is within the third preset time period before the frost risk period, and there is an already acquired frost risk value, it is determined whether the time difference between the current time and the time of the last acquired frost risk value is greater than or equal to the fourth preset time period. If it is greater than or equal to the fourth preset time period, then step S290 is executed; if it is less than the fourth preset time period, then step S280 is executed.

[0103] S280, Issue a second heating signal to control the heating assembly to operate in a second mode.

[0104] In step S280, the time difference between the current moment and the moment when the frost risk value was last obtained has not yet reached the fourth preset duration, so we still need to wait and the heating component continues to run in the second mode.

[0105] S290. Calculate the difference between the previously obtained frost risk value and the currently obtained frost risk value.

[0106] In this embodiment, the difference between the frost risk values ​​at adjacent time points is equal to the difference between the previously acquired frost risk value and the currently acquired frost risk value. Before calculating the difference, it is still necessary to obtain the frost risk value corresponding to the current time point.

[0107] S2100, Determine whether the difference is greater than or equal to zero.

[0108] In step S2100, if the difference between the frost risk values ​​at adjacent time points is greater than or equal to zero, it indicates that the frost risk value has not increased, and step S2110 is executed; if the difference between the frost risk values ​​at adjacent time points is less than zero, it indicates that the frost risk value has increased, and step S2120 is executed.

[0109] S2110, Issue a second heating signal for controlling the heating assembly to operate in a second mode.

[0110] It is understandable that when the difference between the frost risk values ​​at adjacent times is greater than or equal to zero, it means that the frost risk value has not increased. That is, during the transition period from the non-frost risk period to the frost risk period, it is not necessary to increase the heating power of the heating element to prevent frost. Therefore, the heating element is controlled to continue operating in the second mode.

[0111] S2120, A third heating signal is issued to control the heating assembly to operate in a third mode; wherein the average heating power of the third mode is linearly adjusted from the average heating power of the second mode to the average heating power of the first mode.

[0112] In step S2120, if the previous frost risk value is less than the current frost risk value, meaning the possibility of frost forming on the outdoor unit heat exchanger increases and the outdoor environment continues to deteriorate, a third heating signal is issued to control the heating components to operate in a third mode. The average heating power in the third mode is linearly adjusted from the average heating power in the second mode to the average heating power in the first mode. As the outdoor environment gradually deteriorates, the average heating power of the heating components gradually increases, which can prevent frost forming on the outdoor unit, and the energy consumption of the heating components does not increase significantly.

[0113] In some embodiments, please refer to Figure 3 The step of obtaining the frost risk value every fourth preset time interval specifically includes the following steps:

[0114] S2201. Every fourth preset time interval, obtain the first coefficient corresponding to historical humidity information and historical temperature information, and the second coefficient corresponding to historical temperature information and historical rain and snow date information.

[0115] S2202. Determine the pre-stored frost risk correspondence, and determine the frost risk based on the first coefficient, the second coefficient, and the frost risk correspondence.

[0116] In step S2201, a corresponding first coefficient is determined based on historical humidity and temperature information. Based on this historical humidity and temperature information, the theoretical frosting temperature corresponding to that humidity and temperature can be determined. The theoretical frosting temperature changes over different time periods. Plotting time on the x-axis and the theoretical frosting temperature on the y-axis creates a curve that fluctuates over time. The first coefficient is taken as the ratio of the theoretical frosting temperature to the operating temperature. When the first coefficient is greater than or equal to 1.0, the time period is considered a high-risk period for frosting; when the first coefficient is less than 1.0, the time period is considered a low-risk period for frosting.

[0117] When historical temperatures are below a certain threshold, such as below 0 degrees Celsius, and this period coincides with a historical period of rain or snow, the risk of icing and snow accumulation on the outdoor unit's heat exchanger is prioritized, and this period is adjusted to a period of high frost risk. In practice, if historical temperatures are below a certain threshold and this period coincides with a historical period of rain or snow, the second coefficient is 1.0; if these conditions are not met, the second coefficient is 0.

[0118] In this embodiment of the invention, the correspondence between the frosting risk value and the first and second coefficients is the frosting risk correspondence relationship. As mentioned above, the frosting risk value equals the first coefficient plus the second coefficient. The first coefficient is equal to the ratio of the theoretical frosting temperature to the operating temperature, and the second coefficient is 1 or 0. Therefore, the correspondence between the first coefficient, the second coefficient, and the frosting risk value is clear. When the frosting risk value is greater than or equal to 1.0, it is considered a period of frosting risk. As the frosting risk value gradually increases, that is, as the operating temperature gradually decreases relative to the theoretical frosting temperature, the risk of frosting increases.

[0119] The frost risk value is assessed every fourth preset time interval. For example, the third preset time interval is 48 hours and the fourth preset time interval is 6 hours. The change in the frost risk value between the two intervals can be used to assess whether the operating mode of the heating element needs to be adjusted.

[0120] In some embodiments, please refer to Figure 4 The control methods for air conditioners also include:

[0121] S300: Obtain the current time and the frost thickness at the outdoor unit.

[0122] It's understandable that air conditioners can access historical weather information via network signals or from a pre-stored historical weather database. However, in some cases, air conditioners cannot connect to the network or access historical weather databases. In such situations, auxiliary measures are needed to prevent frost, ice, or snow accumulation on the outdoor unit's heat exchanger. This can be achieved by installing thickness detection components at the outdoor unit, such as ultrasonic or infrared radar, to detect the thickness of frost on the coils, columns, or protective mesh. The operating mode is then determined accordingly, thereby controlling the operation of the heating components.

[0123] S310. Determine whether the current weather period is a period of frost risk.

[0124] If the current weather period is determined to be a period of frost risk, proceed to step S320; if the current weather period is determined to be a period of no frost risk, proceed to step S330.

[0125] S330, A second heating signal is issued to control the heating component to operate in a second mode, wherein the average heating power of the second mode is less than the average heating power of the first mode.

[0126] During periods when there is no risk of frost formation, the purpose of the heating components operating in the second mode is to prevent frost formation on the outdoor unit's heat exchanger. Since the external ambient temperature and humidity have not yet reached the level required for frost formation, the average heating power of the second mode is lower than that of the first mode, thus achieving energy-saving effects.

[0127] S320. Determine whether the current frost thickness is greater than the preset thickness.

[0128] It is understandable that if the current weather period is a period of high risk of frost and the frost thickness is greater than or equal to the preset thickness, it means that the frost situation is already very serious, and step S340 is executed at this time; if the above conditions are not met, step S350 is executed.

[0129] S340, A fourth heating signal is issued to control the heating component to operate in a fourth mode, wherein the average heating power of the fourth mode is greater than the average heating power of the first mode.

[0130] In step S340, the frost, ice or snow on the outdoor unit is removed by the heating component. At this time, the average heating power of the fourth mode is greater than that of the first mode, which increases the operating power of the heating component to quickly defrost.

[0131] S350, issues a first heating signal to control the heating assembly to operate in a first mode.

[0132] In step S350, during a period of high risk of frost formation in the current weather, a first heating signal is generated to control the heating component to operate in a first mode. Upon receiving the first heating signal, the heating component begins operation. At this time, the average heating power of the heating component is greater than or equal to the efficiency of heat exchange between the outdoor heat exchanger and the outside environment. This allows the air temperature near the outdoor heat exchanger to gradually rise or stabilize after reaching a specific temperature. This eliminates the frost layer that has condensed on the outdoor heat exchanger and maintains the outdoor heat exchanger at a specific temperature, preventing frost formation.

[0133] In some embodiments, the control method for an air conditioner further includes:

[0134] During the operation of the heating component, the thickness of the frost layer gradually decreases. When the current frost layer thickness is less than the preset thickness, the frost layer has not completely melted, so step S350 is executed.

[0135] S350, issues a first heating signal to control the heating assembly to operate in a first mode.

[0136] In step S350, the heating assembly continues to operate in the first mode to completely remove the frost layer on the outdoor unit coil.

[0137] For the control device of the air conditioner provided according to the second aspect embodiment of the present invention, please refer to Figure 5 ,include:

[0138] The acquisition module 501 is used to acquire the current time and determine the current weather period based on the current time and pre-acquired weather period distribution information; wherein, the weather period distribution information includes: frost risk period and non-frost risk period.

[0139] The signal transmitting module 502 is used to send a first heating signal to control the heating component to operate in a first mode when the current weather period is a frost risk period; and to send a second heating signal to control the heating component to operate in a second mode when the current weather period is a non-frost risk period, wherein the average heating power of the second mode is less than the average heating power of the first mode.

[0140] It should be noted that steps S100, S110, S120, and S130, as well as other steps, are merely for ease of description and do not constitute a temporal limitation on the steps in the air conditioner control method. Furthermore, some content is described in detail in the air conditioner control method provided in the first aspect embodiment, and all content in the air conditioner control method is also applicable to the air conditioner control device provided in the second aspect embodiment. Therefore, to avoid repetition, the air conditioner control device provided in the second aspect embodiment is not described in detail. Similarly, the content in the above two aspects embodiments can be used to explain the content of all subsequent aspects embodiments; therefore, repeated content will not be described in subsequent embodiments. The technical effects of the air conditioner control device provided according to the embodiments of the present invention correspond to the technical effects of the above-described air conditioner control method, and will not be repeated here.

[0141] An air conditioner according to a third aspect of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the control method for the air conditioner according to a first aspect of the present invention.

[0142] When the air conditioner is running, it takes corresponding heating measures based on the weather conditions at the current time. During periods of high risk of frost, the heating element operates in the first mode to prevent frost from forming on the outdoor unit's heat exchanger or to promptly remove rain and snow accumulation at the outdoor unit. During periods of low risk of frost, the heating element operates in the second mode to prevent frost formation on the outdoor unit, and energy consumption is lower at this time, which helps save energy. The air conditioner does not need to switch between cooling and heating modes during defrosting, which avoids interfering with the normal operation of the indoor unit, reduces indoor temperature fluctuations, and improves user comfort.

[0143] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, include: The current time is obtained, and the current weather period is determined based on the current time and pre-acquired weather period distribution information; wherein, the weather period distribution information includes: frost risk period and non-frost risk period; When the current weather period is a period of high risk of frost, a first heating signal is issued to control the heating components to operate in a first mode, wherein the average heating power of the heating components is greater than or equal to the efficiency of heat exchange between the outdoor heat exchanger and the outside. When the current weather period is a non-frost risk period, a second heating signal is issued to control the heating components to operate in a second mode to prevent frost from forming on the outdoor heat exchanger. The average heating power of the second mode is less than the average heating power of the first mode. The step of determining the current weather period further includes: When the current time falls within a third preset time period before the frost risk period, the frost risk value is obtained once every fourth preset time period; When the difference between the frost risk values ​​at adjacent time points is greater than or equal to zero, the second heating signal is sent; When the difference between the frosting risk values ​​at adjacent time points is less than zero, a third heating signal is issued to control the heating component to operate in a third mode; wherein the average heating power of the third mode is linearly adjusted from the average heating power of the second mode to the average heating power of the first mode.

2. The control method for an air conditioner according to claim 1, characterized in that, The weather time distribution information is obtained through the following steps: The geographical location of the air conditioner is obtained, and the corresponding historical weather information is obtained based on the geographical location. The historical weather information includes at least historical humidity information, historical temperature information, and historical rain and snow date information. The weather time period distribution information is obtained based on the historical humidity information, the historical temperature information, and the historical rain and snow date information.

3. The control method for an air conditioner according to claim 1, characterized in that, The first heating signal is used to activate the heating component to maintain the heat exchanger of the outdoor unit at a first temperature.

4. The control method for an air conditioner according to claim 3, characterized in that, The second heating signal is used to keep the heating component working continuously to maintain the heat exchanger of the outdoor unit at a second temperature, which is lower than the first temperature; Alternatively, the second heating signal is used to cause the heating component to operate for a second preset time interval at a first preset time interval, so as to maintain the average temperature of the heat exchanger of the outdoor unit at a third temperature, which is lower than the first temperature.

5. The control method for an air conditioner according to claim 2, characterized in that, The step of obtaining the frost risk value every fourth preset time interval specifically includes: At each of the fourth preset time intervals, a first coefficient corresponding to historical humidity information and historical temperature information, and a second coefficient corresponding to historical temperature information and historical rain and snow date information are obtained; Obtain the pre-stored frost risk correspondence, and determine the frost risk value based on the first coefficient, the second coefficient, and the frost risk correspondence.

6. The control method for an air conditioner according to any one of claims 1 to 5, characterized in that, The method further includes: Obtain the frost thickness at the outdoor unit; When the current weather period is a period of high risk of frost, and the frost layer thickness is greater than or equal to a preset thickness, a fourth heating signal is issued to control the heating component to operate in a fourth mode, wherein the average heating power of the fourth mode is greater than the average heating power of the first mode.

7. The control method for an air conditioner according to claim 6, characterized in that, The method further includes: When the thickness of the frost layer is less than the preset thickness, the first heating signal is emitted.

8. A control device for an air conditioner, characterized in that, include: The acquisition module is used to acquire the current time and determine the current weather period based on the current time and pre-acquired weather period distribution information; wherein, the weather period distribution information includes: frost risk periods and non-frost risk periods; The signal transmitting module, when the current weather period is a frost risk period, sends a first heating signal to control the heating component to operate in a first mode, wherein the average heating power of the heating component is greater than or equal to the heat exchange efficiency between the outdoor heat exchanger and the outside; when the current weather period is a non-frost risk period, sends a second heating signal to control the heating component to operate in a second mode to prevent frost from forming on the outdoor heat exchanger, wherein the average heating power of the second mode is less than the average heating power of the first mode. The acquisition module is also used to acquire a frost risk value every fourth preset time interval after determining the current weather period, when the current time is within a third preset time period before the frost risk period. The signal transmitting module is further configured to: transmit the second heating signal when the difference between the frost risk values ​​at adjacent times is greater than or equal to zero; and issue a third heating signal to control the heating component to operate in a third mode when the difference between the frost risk values ​​at adjacent times is less than zero; wherein the average heating power of the third mode is linearly adjusted from the average heating power of the second mode to the average heating power of the first mode.

9. An air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the control method for the air conditioner as described in any one of claims 1 to 7.

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