Control method and device of air conditioner, air conditioner and storage medium

Abstract

The application discloses a control method and device of an air conditioner, the air conditioner and a storage medium. An outdoor environment temperature and an air outlet temperature of an indoor unit of the air conditioner are acquired. A heating temperature threshold of the indoor unit is determined according to the outdoor environment temperature. If the air outlet temperature is lower than the heating temperature threshold, an outer pipe temperature of an outdoor unit of the air conditioner is acquired. If the outer pipe temperature meets a frosting condition, the air conditioner is controlled to perform a defrosting operation. The application can effectively improve the comfort of the air conditioner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioner control, and in particular to an air conditioner control method and device, an air conditioner and a storage medium. BACKGROUND

[0002] When the outdoor environment temperature is low and the humidity is high, the outdoor unit is prone to frosting, which affects the heating performance of the air conditioner. The commonly used defrosting control logic is that when the outdoor unit's outer pipe temperature or the temperature difference between the outdoor unit's outer pipe temperature and the outdoor environment temperature reaches a certain condition, the control system enters the defrosting operation. The control logic of determining whether to perform the defrosting operation by judging the outdoor unit ignores the indoor situation, and most defrosting operations will affect the heating effect of the indoor environment, resulting in a decrease in the comfort of the indoor environment. SUMMARY

[0003] Embodiments of the present application provide an air conditioner control method and device, an air conditioner and a storage medium, which aim to effectively improve the comfort of the air conditioner.

[0004] In a first aspect, embodiments of the present application provide an air conditioner control method, which comprises:

[0005] obtaining an outdoor environment temperature and an air outlet temperature of an indoor unit of an air conditioner;

[0006] determining a heating temperature threshold of the indoor unit according to the outdoor environment temperature;

[0007] if the air outlet temperature is lower than the heating temperature threshold, obtaining an outer pipe temperature of an outdoor unit of the air conditioner;

[0008] if the outer pipe temperature meets a frosting condition, controlling the air conditioner to perform a defrosting operation.

[0009] Optionally, before the obtaining of the outer pipe temperature of the outdoor unit of the air conditioner, the method further comprises:

[0010] obtaining an indoor environment temperature and a set temperature of the air conditioner;

[0011] determining a heating load of the air conditioner according to the outdoor environment temperature and an indoor space parameter;

[0012] if a temperature difference between the indoor environment temperature and the set temperature is greater than a preset temperature difference corresponding to the heating load, performing the obtaining of the outer pipe temperature of the outdoor unit of the air conditioner.

[0013] Optionally, after the obtaining of the outer pipe temperature of the outdoor unit of the air conditioner, the method further comprises:

[0014] if the outer pipe temperature does not satisfy the frosting condition, determining an operation power of an electric auxiliary heating device of the indoor unit according to a preset temperature difference compensation table, the outlet air temperature, and a temperature difference between the indoor environment temperature and the set temperature;

[0015] controlling the electric auxiliary heating device to operate at the operation power.

[0016] Optionally, before the controlling the air conditioner to perform the defrosting operation, the method further comprises:

[0017] if the outdoor environment temperature is greater than or equal to a preset environment temperature, and the outer pipe temperature is less than a preset outer pipe temperature, determining that the outer pipe temperature satisfies the frosting condition; or,

[0018] if the outdoor environment temperature is less than a preset environment temperature, and a temperature difference between the outer pipe temperature and the outdoor environment temperature is greater than a preset outdoor temperature difference, determining that the outer pipe temperature satisfies the frosting condition.

[0019] Optionally, the controlling the air conditioner to perform the defrosting operation comprises:

[0020] controlling the air conditioner to operate in a refrigeration mode at a target compressor frequency;

[0021] if a running time length of the refrigeration mode exceeds a first preset time length, controlling an outdoor fan of the air conditioner to operate at a target rotating speed;

[0022] until a time length that the outdoor fan operates at the target rotating speed exceeds a second preset time length, completing the defrosting operation.

[0023] Optionally, before the controlling the air conditioner to operate in the refrigeration mode at the target compressor frequency, the method further comprises:

[0024] acquiring a temperature sensing image in a room where the air conditioner is located;

[0025] determining a target angle of a deflector of the air conditioner according to a target region in the temperature sensing image where a temperature is less than a preset temperature;

[0026] adjusting the deflector of the air conditioner according to the target angle.

[0027] Optionally, the determining the heating temperature threshold of the indoor unit according to the outdoor environment temperature comprises:

[0028] acquiring a compressor frequency of the air conditioner;

[0029] inquiring a standard work table to determine a standard outlet air temperature corresponding to the compressor frequency;

[0030] The heating temperature threshold is determined according to the outdoor environment temperature and the standard outlet air temperature.

[0031] In a second aspect, an embodiment of the present application provides a control device of an air conditioner, which comprises:

[0032] A first obtaining module is configured to obtain an outdoor environment temperature and an outlet air temperature of an indoor unit of the air conditioner.

[0033] A determining module is configured to determine a heating temperature threshold of the indoor unit according to the outdoor environment temperature.

[0034] A second obtaining module is configured to obtain an outer pipe temperature of an outdoor unit of the air conditioner if the outlet air temperature is lower than the heating temperature threshold.

[0035] A control module is configured to control the air conditioner to perform a defrosting operation if the outer pipe temperature meets a defrosting condition.

[0036] In a third aspect, an embodiment of the present application further provides an air conditioner, which comprises a processor and a memory. The memory stores a computer program. When the computer program is executed by the processor, the processor executes steps of any one of the control methods of the air conditioner provided by the embodiments of the present application.

[0037] In a fourth aspect, an embodiment of the present application further provides a computer readable storage medium, which comprises a computer program. When the computer program is run on an electronic device, the computer program is used to make the electronic device execute steps of any one of the control methods of the air conditioner provided by the embodiments of the present application.

[0038] First, the outdoor environment temperature and the outlet air temperature of the indoor unit of the air conditioner are obtained. Then, the heating temperature threshold of the indoor unit is determined according to the outdoor environment temperature. If the outlet air temperature is lower than the heating temperature threshold, the outer pipe temperature of the outdoor unit of the air conditioner is obtained. If the outer pipe temperature meets the defrosting condition, the air conditioner is controlled to perform the corresponding defrosting operation. The outlet air temperature of the indoor unit can directly affect the comfort of the air conditioner. In order to affect the outlet air temperature due to defrosting, the defrosting operation is performed at the running time, which also affects the outlet air temperature. Therefore, the heating temperature threshold of the indoor unit is determined according to the outdoor environment temperature. When the outlet air temperature is lower than the heating temperature threshold, the outer pipe temperature of the outdoor unit is used to control the air conditioner to perform the corresponding defrosting operation. Thus, the defrosting operation can be avoided when the outlet air temperature is normal, which prevents the outlet air temperature of the indoor unit from being lowered and the indoor temperature from being fluctuated, thereby ensuring the comfort of the indoor environment and improving the comfort of the air conditioner. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0040] Figure 1 is a first flowchart of an embodiment of the control method of the air conditioner provided in the embodiments of the present application;

[0041] Figure 2 is a second flowchart of the control method of the air conditioner provided in the embodiments of the present application;

[0042] Figure 3 is an application scenario flowchart provided in the embodiments of the present application;

[0043] Figure 4 is a structural diagram of the control device of the air conditioner provided in the embodiments of the present application;

[0044] Figure 5 is a structural diagram of the air conditioner provided in the embodiments of the present application. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Meanwhile, in the description of the embodiments of the present application, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance. Therefore, the features with "first", "second" can explicitly or implicitly include one or more features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0046] The embodiments of the present application provide a control method and device of an air conditioner, an air conditioner and a storage medium.

[0047] Specifically, the present embodiment will be described from the perspective of the control device of the air conditioner, which can be integrated in the air conditioner, i.e. the control method of the air conditioner in the embodiments of the present application can be executed by the air conditioner.

[0048] The following will be described in detail with reference to the accompanying drawings. In the embodiments, the execution subject is an air conditioner. It should be noted that the sequence of the embodiments described below is not intended to limit the preferred sequence of the embodiments. Although a logical sequence is shown in the flowchart, in some cases, the steps shown or described can be performed in a sequence different from that shown in the accompanying drawings.

[0049] According to the background description, the conventional defrosting control logic is that when the temperature of the outer pipe of the outdoor unit or the temperature difference between the temperature of the outer pipe and the outdoor ambient temperature reaches a certain condition, the control system enters the defrosting operation. The control logic for determining whether to perform the defrosting operation by judging the outdoor unit ignores the indoor condition, and most of the defrosting operations affect the heating effect of the indoor environment, resulting in a decrease in the comfort of the air conditioner.

[0050] To solve the above problems, the present application discloses a control method of an air conditioner, please refer to Figure 1 The specific process of the control method of the air conditioner can be as follows: steps S10-S40, wherein:

[0051] Step S10, obtaining the outdoor ambient temperature and the outlet air temperature of the indoor unit of the air conditioner;

[0052] In the embodiments, the air conditioner includes an outdoor unit and an indoor unit. When the air conditioner operates in the heating mode in cold weather, the defrosting of the outdoor unit needs to be considered, and therefore when the air conditioner operates in the heating mode, the indoor heat exchanger in the indoor unit needs to release heat and the outdoor heat exchanger in the outdoor unit needs to absorb heat. When the outdoor heat exchanger absorbs heat, the temperature near it further decreases, and if the outdoor ambient temperature is also relatively low, frost is easily condensed on the surface of the outdoor heat exchanger, affecting the heating effect of the air conditioner and causing the outlet air temperature of the indoor unit to decrease. When the outlet air temperature of the indoor unit decreases, it directly affects the comfort of the indoor environment. Since the outlet air temperature is the direct cause of the comfort of the indoor environment, the outlet air temperature of the indoor unit can be obtained during the operation of the air conditioner. The outlet air temperature of the indoor unit refers to the temperature of the outlet of the indoor unit, which can be collected by a temperature sensor installed at the outlet of the indoor unit. In addition, since the heating load varies with the outdoor ambient temperature, under the condition that other conditions remain unchanged, the outlet air temperature of the indoor unit also varies with the outdoor ambient temperature, and therefore the outdoor ambient temperature also needs to be obtained to determine whether the outlet air temperature is abnormal.

[0053] Step S20, determining the heating temperature threshold of the indoor unit according to the outdoor ambient temperature;

[0054] In this embodiment, after the outdoor environment temperature is acquired, the heating temperature threshold corresponding to the indoor environment temperature is determined according to a preset mapping relationship between the outdoor environment temperature and the heating temperature threshold. The mapping relationship can be a mapping function, a mapping table, a mapping algorithm, a mapping model, etc. The heating temperature threshold refers to the temperature threshold of the heat air delivered by the air conditioner to the indoor environment through the air outlet at the corresponding outdoor environment temperature, and the temperature of the heat air delivered by the air conditioner to the indoor environment is the temperature of the air outlet of the indoor unit. If the outlet temperature is higher than or equal to the heating temperature threshold, it indicates that the heating effect is good, and the air conditioner is qualified for regulating the indoor environment comfort. If the outlet temperature is lower than the heating temperature threshold, it indicates that the heating effect is poor, and the air conditioner is unqualified for regulating the indoor environment comfort, and the comfort of the air conditioner is substandard or will be substandard soon.

[0055] In step S30, if the outlet temperature is lower than the heating temperature threshold, the outdoor unit pipe temperature of the air conditioner is acquired.

[0056] In this embodiment, the reasons for the temperature of the air outlet of the indoor unit being lower than the heating temperature threshold include that the outdoor unit heat exchanger is in a frosting state for a period of time, causing the refrigerant pressure to gradually decrease, and after decreasing to a certain extent, the heat release effect of the indoor heat exchanger is affected, causing the outlet temperature of the indoor unit to be low. It should be noted that a certain period of time is required between the start of frosting of the outdoor heat exchanger and the effect on the outlet temperature of the indoor unit. After the start of frosting, the outlet temperature can still be at a normal temperature for a period of time.

[0057] The reason for the low outlet temperature is not only the frosting of the outdoor heat exchanger, so further frosting detection is required. The outdoor unit pipe temperature of the air conditioner is acquired, which is the surface temperature of the outdoor heat exchanger. If the outdoor heat exchanger has frosted, it will directly affect the outdoor unit pipe temperature, causing the outdoor unit pipe temperature to be low, so whether the air conditioner has frosted can be determined based on the outdoor unit pipe temperature.

[0058] It should be noted that before the air conditioner performs frosting determination and defrosting operation in this embodiment, it is first determined whether the outlet temperature of the indoor unit is lower than the heating temperature threshold corresponding to the current outdoor environment temperature. Since the outlet temperature is a direct factor affecting indoor comfort, the outlet temperature is used as the basis for adjusting the operation of the air conditioner, which can maximize the comfort of the air conditioner. Then further detection is performed to determine whether the air conditioner has frosted, which causes the indoor environment comfort to decrease. Avoiding directly detecting the frosting condition of the air conditioner and then performing defrosting operation, which in turn causes the outlet temperature of the indoor unit to decrease, affects the comfort of the indoor environment, and reduces the comfort of the air conditioner.

[0059] Optionally, before obtaining the outdoor pipe temperature of the air conditioner outdoor unit, the duration that the air outlet temperature is lower than the heating temperature threshold can also be obtained. If the duration is greater than a preset time length, for example, 3 minutes, it is determined that the comfort level of the indoor environment is unqualified, and the operation of the air conditioner needs to be adjusted, and then the step of obtaining the outdoor pipe temperature of the air conditioner outdoor unit is executed.

[0060] In step S40, if the outdoor pipe temperature meets the frosting condition, the air conditioner is controlled to execute the defrosting operation.

[0061] In this embodiment, the outdoor pipe temperature is judged according to the preset frosting judgment condition, and it is determined whether the outdoor pipe temperature meets the preset frosting condition. The frosting condition can be that the outdoor pipe temperature is lower than a certain preset temperature threshold, or the outdoor pipe temperature is lower than a certain preset temperature threshold for a preset time length, or the temperature difference between the outdoor pipe temperature and the outdoor environment temperature is large and lower than the outdoor environment temperature, etc. After it is judged that the outdoor pipe temperature meets the frosting condition, the air conditioner is controlled to execute the defrosting operation. The defrosting operation can be based on the refrigeration mode or the heating mode. The basic principle is to increase the refrigerant temperature in the outdoor heat exchanger, so as to increase the outdoor pipe temperature. However, this means that the outdoor heat exchanger will not absorb heat as in normal heating operation, and the indoor heat exchanger will not release heat as in normal heating operation, and the air outlet temperature of the indoor unit will decrease, affecting the heating effect and leading to a decrease in indoor comfort level. Therefore, when the air outlet temperature is lower than the heating temperature threshold and the outdoor pipe temperature meets the frosting condition, it is indicated that the indoor air outlet temperature is affected by the frosting condition, so that the defrosting can be accurately performed.

[0062] In the technical solution disclosed in this embodiment, the outdoor environment temperature and the air outlet temperature of the indoor unit of the air conditioner are obtained. The heating temperature threshold of the indoor unit is determined according to the outdoor environment temperature. If the air outlet temperature is lower than the heating temperature threshold, the outdoor pipe temperature of the air conditioner outdoor unit is obtained. If the outdoor pipe temperature meets the frosting condition, the air conditioner is controlled to execute the defrosting operation. The air outlet temperature of the indoor unit can directly affect the comfort of the air conditioner. In order to avoid the frosting affecting the air outlet temperature and executing the defrosting operation, but when the defrosting operation is executed, the air outlet temperature will also be affected. Therefore, the heating temperature threshold of the indoor unit is determined according to the outdoor environment temperature, and when the air outlet temperature is lower than the heating temperature threshold, whether the outdoor pipe temperature of the outdoor unit meets the frosting condition is judged to control the air conditioner to execute the corresponding defrosting operation. This not only can reduce the execution of the frosting judgment process and improve the operation efficiency of the air conditioner, but also can avoid the false execution of the defrosting operation when the air outlet temperature is normal, which leads to a decrease in the indoor air outlet temperature and causes the indoor temperature to fluctuate, so as to ensure the comfort of the indoor environment and improve the comfort of the air conditioner.

[0063] Further, before obtaining the outdoor pipe temperature of the air conditioner outdoor unit, the following steps are further included:

[0064] obtaining an indoor environment temperature and a set temperature of the air conditioner;

[0065] determining a heating load of the air conditioner according to the outdoor environment temperature and an indoor space parameter;

[0066] if a temperature difference between the indoor environment temperature and the set temperature is greater than a preset temperature difference corresponding to the heating load, a step of obtaining an outdoor pipe temperature of an outdoor unit of the air conditioner is performed.

[0067] In the embodiment, if the outlet air temperature is lower than the heating temperature threshold, it indicates that the heating effect of the air conditioner is unqualified, which may affect the comfort of the indoor environment. However, after the outlet air temperature is lower than the heating temperature threshold, the actual indoor environment temperature may not immediately decrease. The indoor environment temperature and the set temperature of the air conditioner are obtained. The set temperature of the air conditioner is a temperature that the user sets to control the indoor environment by the air conditioner, which can represent the user demand. The temperature difference between the set temperature of the air conditioner and the indoor environment temperature is combined to determine whether the comfort of the indoor environment can meet the user demand.

[0068] The indoor environment temperature and the set temperature of the air conditioner are obtained. If the temperature difference between the two is too large, it indicates that the comfort of the indoor environment cannot meet the user demand. In the actual operation of the air conditioner, due to different heating loads, a certain temperature difference between the indoor environment temperature and the set temperature is allowed. Within the temperature difference range, it is considered that the comfort of the indoor environment can meet the user demand.

[0069] The heating load represents the difficulty of reaching temperature (the indoor environment temperature reaches the set temperature of the air conditioner) when the air conditioner operates in the heating mode. The higher the heating load is, the more difficult it is to reach temperature. Therefore, when determining whether the current comfort of the indoor environment meets the user demand, the heating load also needs to be considered. The heating load is mainly related to the outdoor environment temperature and the indoor space parameter. The larger the outdoor environment temperature is, the higher the heating load is. The indoor space parameter is a parameter representing the size of the indoor space, which can be the area, height, and the like of the indoor space. The larger the indoor space parameter representing the size of the indoor space is, the higher the heating load is. The heating load corresponding to the current outdoor environment temperature and the indoor space parameter is determined, and then the preset temperature difference between the indoor environment temperature and the set temperature allowed when the air conditioner heats under the current heating load is determined. If the temperature difference between the current indoor environment temperature and the set temperature is greater than the preset temperature difference corresponding to the heating load, the step of obtaining the outdoor pipe temperature of the indoor unit of the air conditioner is performed to enter the judgment of whether the outdoor unit is frosted.

[0070] Thus, whether the heating effect of the air conditioner meets the requirement is not only judged according to the outlet air temperature, but also judged according to the temperature difference between the indoor environment temperature and the set temperature, so as to determine whether the indoor environment meets the user's requirement. When the above requirement is not met, frosting and defrosting operation are considered, so as to improve the indoor environment temperature and further improve the comfort of the air conditioner.

[0071] Further, after the outdoor pipe temperature of the air conditioner outdoor unit is obtained, the following steps are further included:

[0072] If the outdoor pipe temperature does not meet the frosting condition, the running power of the electric auxiliary heating device of the indoor unit is determined according to the preset temperature difference compensation table, the outlet air temperature, and the temperature difference between the indoor environment temperature and the set temperature.

[0073] The electric auxiliary heating device is controlled to run at the running power.

[0074] In the embodiment, after the outdoor pipe temperature of the air conditioner outdoor unit is obtained for frosting judgment of the air conditioner, two results of the outdoor pipe temperature meeting the frosting condition or not meeting the frosting condition are obtained. If the outdoor pipe temperature meets the frosting condition, defrosting operation can be performed to improve the low outlet air temperature of the air conditioner indoor unit. If the outdoor pipe temperature does not meet the frosting condition, it indicates that the low outlet air temperature of the air conditioner is not caused by frosting of the outdoor unit heat exchanger, but caused by other reasons such as device aging and dust accumulation, refrigerant loss, etc. These device side reasons cannot be solved by software control, but in order to ensure the comfort of the air conditioner, an electric auxiliary heating device can be arranged near the outlet of the air conditioner indoor unit to heat the air flow blown by the electric auxiliary device when the outlet air temperature is lower than the heating temperature threshold, so as to improve the outlet air temperature and improve the comfort of the user.

[0075] The electric auxiliary heating device can change the heating temperature of the electric auxiliary heating device by controlling the power of the electric auxiliary heating device, so as to accurately improve the outlet air temperature and save power consumption. Specifically, the target outlet air temperature to be reached by the outlet air temperature is determined according to the temperature difference between the indoor environment temperature and the set temperature, so that the indoor environment temperature can reach the set temperature. Then, the temperature difference to be compensated for the outlet air temperature is determined according to the target outlet air temperature and the current outlet air temperature, the running power of the electric auxiliary heating device of the air conditioner indoor unit is determined by querying the preset temperature difference compensation table, and the electric auxiliary heating device is controlled to run at the preset power.

[0076] Thus, when the outlet air temperature is low and not caused by frosting, the electric auxiliary heating device is accurately controlled to run according to the temperature difference between the indoor environment temperature and the set temperature and the outlet air temperature, so as to improve the outlet air temperature, save power consumption, ensure the comfort of the indoor environment, and improve the comfort of the air conditioner.

[0077] Further, if the outdoor pipe temperature meets the frosting condition, the method further comprises, before controlling the air conditioner to perform the defrosting operation:

[0078] If the outdoor environment temperature is greater than or equal to a preset environment temperature, and the outdoor pipe temperature is less than a preset outdoor pipe temperature, it is determined that the outdoor pipe temperature meets the frosting condition; or,

[0079] If the outdoor environment temperature is less than a preset environment temperature, and a temperature difference between the outdoor pipe temperature and the outdoor environment temperature is greater than a preset outdoor temperature difference, it is determined that the outdoor pipe temperature meets the frosting condition.

[0080] In the embodiment, there are two ways to determine whether the outdoor pipe temperature of the outdoor unit meets the frosting condition, one is to compare the outdoor pipe temperature with the preset outdoor pipe temperature directly, and the other is to compare the temperature difference between the outdoor pipe temperature and the outdoor environment temperature with the preset outdoor temperature difference. The way to determine whether the outdoor unit meets the frosting condition is determined according to the outdoor environment temperature. In different outdoor environment temperature zones, the degree of obvious frosting can be determined by different ways. When the outdoor environment temperature is greater than the preset environment temperature, if the outdoor pipe temperature is less than the preset outdoor pipe temperature, it can be determined that the outdoor heat exchanger surface is obviously frosted. However, when the outdoor environment temperature is less than the preset environment temperature, it is difficult to determine whether the outdoor heat exchanger is obviously frosted only by the outdoor pipe temperature. However, by comparing the temperature difference between the outdoor pipe temperature and the outdoor environment temperature, it can be more easily determined whether the outdoor heat exchanger is obviously frosted. When the outdoor heat exchanger gradually frosts at a lower environment temperature, the outdoor pipe temperature will become lower and lower. When the temperature difference between the outdoor pipe temperature and the outdoor environment temperature reaches a certain threshold, the surface condenser is obviously frosted.

[0081] For example, when the outdoor environment temperature is 0℃ or higher, and the outdoor pipe temperature is less than -2℃, it can be determined that the outdoor heat exchanger is obviously frosted, and the air conditioner can be controlled to perform the defrosting operation. When the outdoor environment temperature is 0℃ or lower, the temperature difference between the outdoor pipe temperature and the outdoor environment temperature is calculated. If the temperature difference is greater than the preset outdoor temperature difference, it can be determined that the outdoor heat exchanger is obviously frosted, and the air conditioner can be controlled to perform the defrosting operation. Therefore, if the outdoor environment temperature is greater than or equal to the preset environment temperature, and the outdoor pipe temperature is less than the preset outdoor pipe temperature, it is determined that the outdoor pipe temperature meets the frosting condition; or,

[0082] If the outdoor environment temperature is less than the preset environment temperature, and the temperature difference between the outdoor pipe temperature and the outdoor environment temperature is greater than the preset outdoor temperature difference, it is determined that the outdoor pipe temperature meets the frosting condition.

[0083] In this way, the way to determine whether the outdoor heat exchanger is obviously frosted is selected according to the outdoor environment temperature, which can more accurately determine whether the outdoor heat exchanger is frosted, so as to accurately perform the defrosting operation, reduce the influence on the indoor environment comfort, and further improve the comfort of the air conditioner.

[0084] For better understanding, a specific application scenario is provided below, please refer to Figure 3 :

[0085] When the air conditioner is powered on and runs in the heating mode, the outdoor environment temperature is detected, the heating temperature threshold is determined according to the corresponding temperature zone of the outdoor environment temperature, if the outlet air temperature is greater than the heating temperature threshold corresponding to the outdoor environment temperature, the air conditioner is normally operated, otherwise if the outlet air temperature is less than or equal to the heating temperature threshold corresponding to the outdoor environment temperature, it is necessary to further determine whether the outer pipe temperature meets the defrosting condition, so as to control the air conditioner to execute the defrosting mode.

[0086] Further, the heating temperature threshold of the indoor unit is determined according to the outdoor environment temperature, comprising:

[0087] The compressor frequency of the air conditioner is obtained;

[0088] The standard work table is queried to determine the standard outlet air temperature corresponding to the compressor frequency;

[0089] The heating temperature threshold is determined according to the outdoor environment temperature and the standard outlet air temperature.

[0090] In this embodiment, the outlet air temperature of the air conditioner is mainly affected by the exhaust temperature of the compressor, and the exhaust temperature of the compressor is related to the compressor frequency. When the compressor frequency is fixed, the outlet air temperature will also be fixed in theory, but affected by the cooling load of the external environment and the frosting condition of the outdoor unit heat exchanger, the outlet air temperature will not reach the standard outlet air temperature corresponding to the compressor frequency. If the outdoor heat exchanger does not frost, the main reason affecting the outlet air temperature is the outdoor environment temperature, and the outlet air temperature should be higher than or equal to the heating temperature threshold, so the corresponding standard outlet air temperature can be determined according to the current air conditioner compressor frequency, and then the heating temperature threshold is determined according to the standard outlet air temperature and the indoor environment temperature. In this way, the heating temperature threshold is accurately set according to the compressor frequency and the outdoor environment temperature of the air conditioner, the heating effect of the air conditioner and the indoor environment comfort can be more accurately determined, and the comfort of the air conditioner can be further improved.

[0091] Optionally, referring to Figure 2 , based on any of the above embodiments, in another embodiment of the control method of the air conditioner of the application, the step S40 comprises:

[0092] Step S41, control the air conditioner to run in the refrigeration mode at the target compressor frequency;

[0093] In the embodiment, since the precondition for entering the frost judgment is that the outlet air temperature is lower than the heating temperature threshold, the indoor environment temperature will soon be affected by the outlet air temperature, at which time the influence of the defrosting operation on the indoor environment temperature does not need to be considered, and a more efficient defrosting operation needs to be performed to quickly defrost and restore the normal operation of the air conditioner. Controlling the air conditioner to run in the refrigeration mode at the target compressor frequency can achieve efficient defrosting, and when the air conditioner switches from the heating mode to the refrigeration mode, the four-way valve of the air conditioner is reversed, and the heat exchange modes of the indoor heat exchanger and the outdoor heat exchanger are replaced, so that the indoor heat exchanger absorbs heat and the outdoor heat exchanger releases heat, so that the surface temperature of the outdoor heat exchanger rises, and the ice and frost on the surface of the outdoor heat exchanger can be quickly melted. The target operating compressor frequency can be the maximum compressor frequency, so that the heat release effect of the outdoor heat exchanger is better, and the defrosting can be more efficient.

[0094] Step S42, if the running time of the refrigeration mode exceeds the first preset time, the outdoor fan of the air conditioner is controlled to run at a target speed; until the time for which the outdoor fan runs at the target speed exceeds the second preset time, the defrosting operation is completed.

[0095] In the embodiment, running in the refrigeration mode for a certain time can achieve defrosting of the surface of the outdoor heat exchanger, and if the running time of the refrigeration mode exceeds the first preset time, it is considered that the frost on the surface of the outdoor heat exchanger is completely removed. Further, the outdoor fan of the air conditioner is controlled to run at a target speed to remove the water remaining on the surface of the outdoor heat exchanger after defrosting through air flow, so as to avoid secondary frosting and affect the comfort of the air conditioner. The target speed can be the maximum speed of the outdoor fan, so that the water on the surface of the outdoor heat exchanger can be dried more quickly. Moreover, running the outdoor fan can further reduce the water on the surface of the outdoor heat exchanger to the water before frosting, and further prevent frosting. If the time for which the outdoor fan runs at the target speed exceeds the second preset time, or the humidity on the surface of the outdoor heat exchanger is detected to be lower than a preset threshold, it can be determined that the defrosting operation is completed, and the refrigeration mode is quickly restored to restore the comfort of the indoor environment.

[0096] In the technical scheme disclosed in the embodiment, the air conditioner is controlled to run in the refrigeration mode at a target compressor frequency; if the running time of the refrigeration mode exceeds the first preset time, the outdoor fan of the air conditioner is controlled to run at a target speed; until the time for which the outdoor fan runs at the target speed exceeds the second preset time, the defrosting operation is completed. Through the refrigeration mode, the defrosting can be more efficient, and the outdoor fan can be used to avoid re-frosting, thereby reducing the defrosting time and more quickly restoring the comfort of the indoor environment, thereby further improving the comfort of the air conditioner.

[0097] Further, before the control of the air conditioner to run in the refrigeration mode at the target compressor frequency, the method further comprises:

[0098] acquire a temperature sensing image of a room where the air conditioner is located;

[0099] determine a target angle of a deflector of the air conditioner according to a target region in the temperature sensing image where the temperature is less than a preset temperature;

[0100] adjust the deflector of the air conditioner according to the target angle.

[0101] In this embodiment, when the air conditioner operates in the cooling mode, cold air is blown into the room, and objects in the room are cooled faster. If the cold air is blown to a target object such as a user or a pet, the thermal sensation of the target object is affected, and discomfort is caused. Therefore, a temperature sensing image of a room where the air conditioner is located can be acquired. The temperature sensing image is an image generated according to the temperature at each position in the room. If a target object such as a user or a pet exists in the room, the temperature in a region corresponding to the position of the target object in the temperature sensing image is displayed to be higher. The cold air cannot be blown to the target object to avoid causing discomfort of the target object, and the cold air can be blown to objects with lower temperature, such as a floor and a corner. Each region in the temperature window image is polled to determine a target region where the temperature is less than a preset temperature. The target region corresponds to a space where no target object that cannot be directly blown by the cold air exists. Therefore, the direction of the target region relative to the air conditioner can be taken as a target angle of a deflector of the air conditioner. The deflector of the air conditioner is adjusted to the target angle to control the cold air blown by the air conditioner in the cooling mode to be directed to the space corresponding to the target region, and not blown to a target object such as a user or a pet with higher temperature, to avoid causing discomfort of the target object and reduce the comfort of the air conditioner.

[0102] This embodiment also provides a control device of an air conditioner. The control device of the air conditioner can be integrated in the air conditioner. For example, as shown in Figure 4 The control device of the air conditioner can include:

[0103] The first acquisition module 1001 is configured to acquire an outdoor environment temperature and an air outlet temperature of an indoor unit of the air conditioner.

[0104] The determination module 1002 is configured to determine a heating temperature threshold of the indoor unit according to the outdoor environment temperature.

[0105] The second acquisition module 1003 is configured to acquire an outer pipe temperature of an outdoor unit of the air conditioner if the air outlet temperature is lower than the heating temperature threshold.

[0106] The control module 1004 is configured to control the air conditioner to perform a defrosting operation if the outer pipe temperature meets a frosting condition.

[0107] Optionally, before the second acquisition module 1003 acquires the outer pipe temperature of the outdoor unit of the air conditioner, the control device of the air conditioner further includes:

[0108] acquire an indoor environment temperature and a set temperature of the air conditioner.

[0109] determining the heating load of the air conditioner according to the outdoor environment temperature and the indoor space parameter;

[0110] if the temperature difference between the indoor environment temperature and the set temperature is greater than the preset temperature difference corresponding to the heating load, obtaining the outdoor pipe temperature of the outdoor unit of the air conditioner.

[0111] Optionally, after the control module 1004 obtains the outdoor pipe temperature of the outdoor unit of the air conditioner, the control module 1004 further comprises:

[0112] if the outdoor pipe temperature does not satisfy the frosting condition, determining the operating power of the electric auxiliary heating device of the indoor unit according to the preset temperature difference compensation table, the outlet air temperature, and the temperature difference between the indoor environment temperature and the set temperature;

[0113] controlling the electric auxiliary heating device to operate at the operating power.

[0114] Optionally, the control device of the air conditioner further comprises a judgment module, and the judgment module is configured to, if the outdoor pipe temperature satisfies the frosting condition, before controlling the air conditioner to perform the defrosting operation, further comprising:

[0115] if the outdoor environment temperature is greater than or equal to a preset environment temperature, and the outdoor pipe temperature is less than a preset outdoor pipe temperature, it is determined that the outdoor pipe temperature satisfies the frosting condition; or,

[0116] if the outdoor environment temperature is less than a preset environment temperature, and the temperature difference between the outdoor pipe temperature and the outdoor environment temperature is greater than a preset outdoor temperature difference, it is determined that the outdoor pipe temperature satisfies the frosting condition.

[0117] Optionally, the control module 1004 controls the air conditioner to perform the defrosting operation, comprising:

[0118] controlling the air conditioner to operate in a refrigeration mode at a target compressor frequency;

[0119] if the operating time length of the refrigeration mode exceeds a first preset time length, controlling the outdoor fan of the air conditioner to operate at a target rotating speed;

[0120] until the time length during which the outdoor fan operates at the target rotating speed exceeds a second preset time length, the defrosting operation is completed.

[0121] Optionally, before the control module 1004 controls the air conditioner to operate in the refrigeration mode at the target compressor frequency, the control module 1004 further comprises:

[0122] obtaining a temperature sensing image of a room in which the air conditioner is located;

[0123] The target angle of the air guide plate of the air conditioner is determined based on the target area with a temperature lower than the preset temperature in the temperature sensing image.

[0124] Adjust the air guide plate of the air conditioner according to the target angle.

[0125] Optionally, the determining module 1002 determines the heating temperature threshold of the indoor unit based on the outdoor ambient temperature, including:

[0126] Obtain the compressor frequency of the air conditioner;

[0127] Consult the standard worksheet to determine the standard outlet air temperature corresponding to the compressor frequency;

[0128] The heating temperature threshold is determined based on the outdoor ambient temperature and the standard air outlet temperature.

[0129] In this embodiment, the outdoor ambient temperature and the air outlet temperature of the indoor unit of the air conditioner are first acquired. A heating temperature threshold for the indoor unit is determined based on the outdoor ambient temperature. If the air outlet temperature is lower than the heating temperature threshold, the temperature of the outdoor pipe of the air conditioner's outdoor unit is acquired. If the outdoor pipe temperature meets the frosting conditions, the air conditioner is controlled to perform a defrosting operation. The air outlet temperature of the indoor unit directly affects the comfort of the air conditioner. Running a defrosting operation to achieve frosting, which affects the air outlet temperature, will also affect the air outlet temperature during operation. By first determining the heating temperature threshold of the indoor unit based on the outdoor ambient temperature, and then determining if the air outlet temperature is lower than the heating temperature threshold, the air conditioner is controlled to perform the corresponding defrosting operation based on whether the outdoor pipe temperature meets the frosting conditions. This avoids incorrectly performing a defrosting operation when the air outlet temperature is normal, which could lead to a lower indoor air outlet temperature and fluctuations in indoor temperature, thus ensuring indoor environmental comfort and improving the comfort of the air conditioner.

[0130] like Figure 5 As shown, Figure 5 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of the present invention. The air conditioner 1100 includes a processor 1101 with one or more processing cores, a memory 1102 with one or more computer-readable storage media, and a computer program stored on the memory 1102 and executable on the processor. The processor 1101 and the memory 1102 are electrically connected. Those skilled in the art will understand that the air conditioner structure shown in the figure does not constitute a limitation on the air conditioner, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0131] The processor 1101 is the control center of the air conditioner 1100, connects various parts of the air conditioner 1100 through various interfaces and lines, executes various functions of the air conditioner 1100 and processes data by running or loading software programs and / or units stored in the memory 1102 and calling data stored in the memory 1102, thereby monitoring the air conditioner 1100 as a whole. The processor 1101 can be a processor CPU, a graphics processor GPU, a network processor (NP), etc., and can implement or execute various methods, steps and logic block diagrams disclosed in the embodiments of the application.

[0132] In the embodiments of the application, the processor 1101 in the air conditioner 1100 loads the instructions corresponding to the processes of one or more application programs into the memory 1102, and runs the application programs stored in the memory 1102 by the processor 1101, thereby realizing various functions, for example:

[0133] Obtaining an outdoor environment temperature and an air outlet temperature of an indoor unit of the air conditioner;

[0134] Determining a heating temperature threshold of the indoor unit according to the outdoor environment temperature;

[0135] If the air outlet temperature is lower than the heating temperature threshold, obtaining an outer pipe temperature of an outdoor unit of the air conditioner;

[0136] If the outer pipe temperature meets a frosting condition, controlling the air conditioner to perform a defrosting operation.

[0137] The specific implementation of each operation can refer to the previous embodiments, which will not be repeated here.

[0138] Optionally, as shown in Figure 5 The air conditioner 1100 further includes a touch display screen 1103, a radio frequency circuit 1104, an audio circuit 1105, an input unit 1106 and a power supply 1107. The processor 1101 is electrically connected with the touch display screen 1103, the radio frequency circuit 1104, the audio circuit 1105, the input unit 1106 and the power supply 1107 respectively. Those skilled in the art can understand that the structure of the air conditioner shown in Figure 5 The structure of the air conditioner shown in the above embodiments does not constitute a limitation on the air conditioner, and can include more or fewer components than the drawings, or combine certain components, or different component arrangements.

[0139] The touch display screen 1103 can be used to display a graphical user interface and receive operation instructions generated by user acting on the graphical user interface. The touch display screen 1103 can include a display panel and a touch panel. The display panel can be used to display information input by the user or provided to the user and various graphical user interfaces of the air conditioner, which can be composed of graphics, text, icons, videos and any combination thereof. Optionally, the display panel can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc. The touch panel can be used to collect touch operations of the user thereon or adjacent thereto (such as operations of the user using a finger, a stylus or any suitable object or accessory on or adjacent to the touch panel), and generate corresponding operation instructions, and the operation instructions execute corresponding programs. Optionally, the touch panel can include two parts of a touch detection device and a touch controller. The touch detection device detects the touch position of the user and detects signals generated by the touch operation, and transmits the signals to the touch controller; the touch controller receives the touch information from the touch detection device, and converts it into touch coordinates, and then sends it to the processor 1101, and can also receive commands from the processor 1101 and execute them. The touch panel can cover the display panel, and when the touch panel detects a touch operation thereon or adjacent thereto, it transmits to the processor 1101 to determine the type of the touch event, and then the processor 1101 provides corresponding visual output on the display panel according to the type of the touch event. In the embodiments of the present application, the touch panel and the display panel can be integrated into the touch display screen 1103 to realize the input and output functions. However, in some embodiments, the touch panel and the touch panel can realize the input and output functions as two independent components. That is, the touch display screen 1103 can also realize the input function as part of the input unit 1106.

[0140] The radio frequency circuit 1104 can be used to transceive radio frequency signals to establish wireless communication with network devices or other air conditioners, and transceive signals between network devices or other air conditioners.

[0141] The audio circuit 1105 can be used to provide an audio interface between the user and the air conditioner through the speaker and the microphone. The audio circuit 1105 can convert the received audio data into an electrical signal and transmit it to the speaker, which converts it into a sound signal output. On the other hand, the microphone collects the sound signal and converts it into an electrical signal, which is received by the audio circuit 1105 and converted into audio data. After being processed by the processor 1101, the audio data is transmitted to another air conditioner through the radio frequency circuit 1104, or output to the memory 1102 for further processing. The audio circuit 1105 can also include an earphone jack to provide communication between an external earphone and the air conditioner.

[0142] The input unit 1106 can be configured to receive inputted digital, character information or user feature information (e.g. fingerprint, iris, face information, etc.), and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0143] The power supply 1107 is configured to supply power to various components of the air conditioner 1100. Optionally, the power supply 1107 can be logically connected to the processor 1101 through a power management system, so as to realize functions such as management of charging, discharging and power consumption management through the power management system. The power supply 1107 can also include one or more than one direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power state indicator and any other components.

[0144] Although Figure 5 The air conditioner 1100 can also include a camera, a sensor, a wireless fidelity module, a Bluetooth module, etc. which are not shown in the embodiments and will not be described herein.

[0145] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0146] Those skilled in the art can understand that all or part of the steps in the methods of the above embodiments can be completed by instructions, or by relevant hardware controlled by the instructions, which can be stored in a computer readable storage medium and loaded and executed by a processor.

[0147] To this end, the embodiments of the present application provide a computer readable storage medium, which stores a plurality of computer programs capable of being loaded by a processor to execute any of the control methods of the air conditioner provided by the embodiments of the present application. The computer program can execute the steps of the control method of the air conditioner as follows:

[0148] Obtaining an outdoor environment temperature and an outlet temperature of an indoor unit of the air conditioner;

[0149] Determining a heating temperature threshold of the indoor unit according to the outdoor environment temperature;

[0150] If the outlet temperature is lower than the heating temperature threshold, obtaining an outer pipe temperature of an outdoor unit of the air conditioner;

[0151] If the outer pipe temperature meets a frosting condition, controlling the air conditioner to perform a defrosting operation.

[0152] The specific implementation of each operation can be referred to the previous embodiments, which will not be described herein.

[0153] The computer readable storage medium can include a read only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0154] Due to the computer program stored in the computer readable storage medium, any of the control methods of the air conditioner provided by the embodiments of the present application can be executed, thus the beneficial effects of any of the control methods of the air conditioner provided by the embodiments of the present application can be achieved, which will be described in detail in the foregoing embodiments and will not be repeated here.

[0155] In the above embodiments of the control device of the air conditioner, the computer readable storage medium, the air conditioner and the computer program product, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments. It can be clearly understood by those skilled in the art that, for the convenience and brevity of description, the specific working process of the above-described control device of the air conditioner, computer readable storage medium, computer program product, air conditioner and its corresponding units and the beneficial effects brought by them can be referred to the description of the control method of the air conditioner in the above embodiments, and will not be repeated here.

[0156] The above describes in detail the control method of the air conditioner, the control device of the air conditioner, the air conditioner, the computer readable storage medium and the computer program product provided by the embodiments of the present application. The principle and implementation manner of the present application are described by applying specific examples in this paper. The above description of the embodiments is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A control method of an air conditioner, characterized by, The control method of the air conditioner comprises: obtaining an outdoor environment temperature and an outlet air temperature of an indoor unit of the air conditioner; determining a heating temperature threshold of the indoor unit according to the outdoor environment temperature and a compressor frequency; if the outlet air temperature is lower than the heating temperature threshold, obtaining an outer pipe temperature of an outdoor unit of the air conditioner; if the outer pipe temperature meets a frosting condition, controlling the air conditioner to perform a defrosting operation.

2. The control method of the air conditioner according to claim 1, characterized by, Before the obtaining of the outer pipe temperature of the outdoor unit of the air conditioner, the method further comprises: obtaining an indoor environment temperature and a set temperature of the air conditioner; determining a heating load of the air conditioner according to the outdoor environment temperature and an indoor space parameter; if a temperature difference between the indoor environment temperature and the set temperature is greater than a preset temperature difference corresponding to the heating load, performing the obtaining of the outer pipe temperature of the outdoor unit of the air conditioner.

3. The control method of the air conditioner according to claim 2, characterized by, After the obtaining of the outer pipe temperature of the outdoor unit of the air conditioner, the method further comprises: if the outer pipe temperature does not meet the frosting condition, determining an operating power of an electric auxiliary heating device of the indoor unit according to a preset temperature difference compensation table, the outlet air temperature, and a temperature difference between the indoor environment temperature and the set temperature; and controlling the electric auxiliary heating device to operate at the operating power.

4. The control method of the air conditioner according to claim 1, wherein Before the if the outer pipe temperature meets the frosting condition, the method further comprises: if the outdoor environment temperature is greater than or equal to a preset environment temperature, and the outer pipe temperature is lower than a preset outer pipe temperature, determining that the outer pipe temperature meets the frosting condition; or if the outdoor environment temperature is lower than a preset environment temperature, and a temperature difference between the outer pipe temperature and the outdoor environment temperature is greater than a preset outdoor temperature difference, determining that the outer pipe temperature meets the frosting condition.

5. The control method of the air conditioner according to claim 1, wherein The controlling of the air conditioner to perform the defrosting operation comprises: controlling the air conditioner to operate in a refrigeration mode at a target compressor frequency; if a running time of the refrigeration mode exceeds a first preset time, controlling an outdoor fan of the air conditioner to operate at a target rotating speed; until a time for which the outdoor fan operates at the target rotating speed exceeds a second preset time, completing the defrosting operation.

6. The control method of the air conditioner according to claim 5, characterized by, Before the controlling of the air conditioner to operate in the refrigeration mode at the target compressor frequency, the method further comprises: obtaining a temperature sensing image in a room where the air conditioner is located; determining a target angle of a deflector of the air conditioner according to a target region in the temperature sensing image in which a temperature is lower than a preset temperature; and adjusting the deflector of the air conditioner according to the target angle.

7. The control method of an air conditioner according to any one of claims 1 to 6, characterized by, The determining of the heating temperature threshold of the indoor unit according to the outdoor environment temperature and the compressor frequency comprises: obtaining a compressor frequency of the air conditioner; inquiring a standard table to determine a standard outlet air temperature corresponding to the compressor frequency; and determining the heating temperature threshold according to the outdoor environment temperature and the standard outlet air temperature.

8. A control device of an air conditioner, characterized by comprising: The control device of the air conditioner comprises: a first obtaining module, configured to obtain an outdoor environment temperature and an outlet air temperature of an indoor unit of the air conditioner; a determining module, configured to determine a heating temperature threshold of the indoor unit according to the outdoor environment temperature and a compressor frequency; a second obtaining module, configured to obtain an outer pipe temperature of an outdoor unit of the air conditioner if the outlet air temperature is lower than the heating temperature threshold; and A control module is configured to control the air conditioner to perform a defrosting operation if the temperature of the outer tube satisfies a defrosting condition.

9. An air conditioner characterized by comprising: The air conditioner comprises a processor and a memory. The memory stores a computer program. When the computer program is executed by the processor, the processor executes the steps of the control method of the air conditioner according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium comprises a computer program. When the computer program is executed on an electronic device, the computer program is configured to cause the electronic device to execute the steps of the control method of the air conditioner according to any one of claims 1-7.

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