Air conditioner and defrosting control method and device thereof, storage medium and program product

Abstract

The invention provides an air conditioner and a defrosting control method and device thereof, a storage medium and a program product. The method comprises the steps that the outdoor environment temperature and the outdoor environment humidity are obtained; whether the obtained outdoor environment temperature and outdoor environment humidity meet preset conditions or not is judged, and the preset conditions include that the outdoor environment temperature is within a preset temperature range, and the outdoor environment humidity reaches preset humidity; if it is judged that the obtained outdoor environment temperature and outdoor environment humidity meet the preset conditions, whether the air conditioner needs to be defrosted or not is judged according to the coil pipe temperature of an outdoor heat exchanger and the air outlet temperature of an outdoor unit; and if it is judged that the air conditioner needs to be defrosted, the air conditioner is controlled to be defrosted. According to the scheme, it can be guaranteed that the frost layer of the outdoor unit heat exchanger can be completely melted in the low-temperature and high-humidity outdoor environment.

Description

Technical Field

[0001] This invention relates to the field of control, and more particularly to an air conditioner and its defrosting control method, apparatus, storage medium and program product. Background Technology

[0002] During the heating process, when the external operating conditions reach certain levels, the outdoor unit's heat exchanger will frost over. This frost increases the heat exchanger's thermal resistance, affecting its heat exchange efficiency. Defrosting is usually necessary to restore the heat exchanger's performance. In related technologies, air conditioners typically determine defrosting needs by combining the outdoor ambient temperature and the temperature of the outdoor unit's heat exchanger coils. However, when the outdoor ambient temperature is low and humidity is high, the outdoor unit's heat exchanger is more prone to frost buildup, and the frost layer is relatively thick. This can lead to incomplete defrosting, resulting in accumulated frost that further increases the heat exchanger's thermal resistance, severely impacting its heat exchange efficiency and ultimately reducing the air conditioner's heating performance. Summary of the Invention

[0003] The main objective of this invention is to overcome the deficiencies of the aforementioned related technologies and provide an air conditioner and its defrosting control method, device, storage medium, and program product to solve the problem that when the outdoor ambient temperature is low and the humidity is high, the outdoor unit heat exchanger is more prone to frost formation and the frost layer is relatively thick, which may result in incomplete defrosting.

[0004] This invention provides a defrosting control method for an air conditioner, comprising: acquiring outdoor ambient temperature and outdoor ambient humidity; determining whether the acquired outdoor ambient temperature and outdoor ambient humidity meet preset conditions, the preset conditions including: the outdoor ambient temperature is within a preset temperature range and the outdoor ambient humidity reaches a preset humidity; if the acquired outdoor ambient temperature and outdoor ambient humidity meet the preset conditions, determining whether the air conditioner needs to defrost based on the outdoor heat exchanger coil temperature and the outdoor unit outlet air temperature; if the air conditioner needs to defrost, controlling the air conditioner to enter the defrosting state.

[0005] Optionally, determining whether the air conditioner needs defrosting based on the outdoor heat exchanger coil temperature and the outdoor unit outlet air temperature includes: obtaining the first outdoor unit outlet air temperature and the first outdoor unit heat exchanger coil temperature when the air conditioner has been running for a first preset time, and the second outdoor unit outlet air temperature and the second outdoor unit heat exchanger coil temperature when the air conditioner has been running for a second preset time; determining whether a first temperature difference between the first outdoor unit outlet air temperature and the first outdoor unit heat exchanger coil temperature is less than a second temperature difference between the second outdoor unit outlet temperature and the second outdoor unit heat exchanger coil temperature; if the first temperature difference is less than the second temperature difference, and the second temperature difference is less than or equal to a first preset difference threshold, then obtaining the third temperature difference when the air conditioner has been running for a third preset time. The system measures the outdoor unit's outlet air temperature and the third outdoor unit's heat exchanger coil temperature. Based on these temperatures, it determines whether the air conditioner needs to defrost. If the first temperature difference is greater than or equal to the second temperature difference and / or the second temperature difference is greater than a first preset difference threshold, it checks whether the outdoor heat exchanger coil temperature has reached a preset defrosting pipe temperature. If the outdoor heat exchanger coil temperature reaches the preset defrosting pipe temperature, it determines that the air conditioner needs to defrost. Otherwise, it measures the third outdoor unit's outlet air temperature and the third outdoor unit's heat exchanger coil temperature when the air conditioner has been running for a third preset time. Based on these temperatures, it determines whether the air conditioner needs to defrost.

[0006] Optionally, determining whether the air conditioner needs to defrost based on the obtained third outdoor unit outlet air temperature and third outdoor unit heat exchanger coil temperature includes: determining whether a third temperature difference between the third outdoor unit outlet air temperature and the third outdoor unit heat exchanger coil temperature is greater than a second temperature difference; if the third temperature difference is greater than the second temperature difference and the third temperature difference is greater than a second preset difference threshold, then the air conditioner needs to defrost; the second preset difference threshold is greater than the first preset difference threshold; if the third temperature difference is less than or equal to the second temperature difference and / or the third temperature difference is less than or equal to the second preset difference threshold, then detecting whether the outdoor heat exchanger coil temperature has reached a preset defrosting pipe temperature; if the outdoor heat exchanger coil temperature has reached the preset defrosting pipe temperature, then the air conditioner needs to defrost.

[0007] Optionally, it further includes: if the outdoor heat exchanger coil temperature does not reach the preset defrost pipe temperature, then detecting the current outdoor unit outlet air temperature and the outdoor unit heat exchanger coil temperature; and determining the current outdoor unit outlet air temperature T. 外出风The system checks whether the difference between the outdoor unit heat exchanger coil temperature and the outdoor unit temperature is greater than a third preset difference threshold, where the third preset difference threshold is greater than a second preset difference threshold. If the difference is greater than the third preset difference threshold or the outdoor unit heat exchanger coil temperature T... 外管 Once the preset defrosting pipe temperature is reached, it is determined that the air conditioner needs to defrost.

[0008] Optionally, it also includes: if it is determined that the obtained outdoor ambient temperature and outdoor ambient humidity do not meet the preset conditions, then it is determined whether defrosting is required based on the outdoor ambient temperature and the outdoor heat exchanger coil temperature; if it is determined that the air conditioner needs to defrost, then it is controlled to enter the defrosting state.

[0009] Optionally, obtaining outdoor ambient temperature and outdoor ambient humidity includes: obtaining real-time outdoor ambient temperature and outdoor ambient humidity at the location of the air conditioner via a network connection.

[0010] Another aspect of the present invention provides a defrosting control method for an air conditioner, comprising: an acquisition unit for acquiring outdoor ambient temperature and outdoor ambient humidity; a first judgment unit for judging whether the outdoor ambient temperature and outdoor ambient humidity acquired by the acquisition unit meet preset conditions, the preset conditions including: the outdoor ambient temperature is within a preset temperature range and the outdoor ambient humidity reaches a preset humidity; a second judgment unit for judging whether the air conditioner needs to defrost based on the outdoor heat exchanger coil temperature and the outdoor unit outlet air temperature if the first judgment unit judges that the outdoor ambient temperature and outdoor ambient humidity acquired by the acquisition unit meet the preset conditions; and a control unit for controlling the air conditioner to enter the defrosting state if the second judgment unit judges that the air conditioner needs to defrost.

[0011] Optionally, the second determining unit determines whether the air conditioner needs to defrost based on the outdoor heat exchanger coil temperature and the outdoor unit outlet air temperature, including: acquiring the first outdoor unit outlet air temperature and the first outdoor unit heat exchanger coil temperature when the air conditioner has been running for a first preset time, and the second outdoor unit outlet air temperature and the second outdoor unit heat exchanger coil temperature when the air conditioner has been running for a second preset time; determining whether a first temperature difference between the first outdoor unit outlet air temperature and the first outdoor unit heat exchanger coil temperature is less than a second temperature difference between the second outdoor unit outlet air temperature and the second outdoor unit heat exchanger coil temperature; if the first temperature difference is less than the second temperature difference, and the second temperature difference is less than or equal to a first preset difference threshold, then acquiring the third outdoor unit outlet air temperature and the third outdoor unit heat exchanger coil temperature when the air conditioner has been running for a third preset time; determining whether the air conditioner needs to defrost based on the acquired third outdoor unit outlet air temperature and the third outdoor unit heat exchanger coil temperature; if the first temperature difference is greater than or equal to the second temperature difference, then detecting whether the outdoor heat exchanger coil temperature has reached a preset defrosting entry temperature.

[0012] If the outdoor heat exchanger coil temperature reaches the preset defrosting pipe temperature, it is determined that the air conditioner needs to defrost; otherwise, the third outdoor unit outlet air temperature and the third outdoor unit heat exchanger coil temperature are obtained when the air conditioner has been running for a third preset time; based on the obtained third outdoor unit outlet air temperature and the third outdoor unit heat exchanger coil temperature, it is determined whether the air conditioner needs to defrost.

[0013] Optionally, the second determining unit determines whether the air conditioner needs to defrost based on the acquired outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit, including: determining whether a third temperature difference between the outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit is greater than a second temperature difference; if the third temperature difference is greater than the second temperature difference and the third temperature difference is greater than a second preset difference threshold, then the air conditioner needs to defrost; the second preset difference threshold is greater than the first preset difference threshold; if the third temperature difference is less than or equal to the second temperature difference and / or the third temperature difference is less than or equal to the second preset difference threshold, then the outdoor heat exchanger coil temperature is detected to have reached a preset defrosting pipe temperature; if the outdoor heat exchanger coil temperature reaches the preset defrosting pipe temperature, then the air conditioner needs to defrost.

[0014] Optionally, the second judgment unit is further configured to: if the outdoor heat exchanger coil temperature does not reach the preset defrost pipe temperature, detect the current outdoor unit outlet air temperature and the outdoor unit heat exchanger coil temperature; determine whether the difference between the current outdoor unit outlet air temperature and the outdoor unit heat exchanger coil temperature is greater than a third preset difference threshold, the third preset difference threshold being greater than the second preset difference threshold; if the difference is greater than the third preset difference threshold or the outdoor unit heat exchanger coil temperature reaches the preset defrost pipe temperature, determine that the air conditioner needs to defrost.

[0015] Optionally, the second judgment unit is further configured to: if the first judgment unit determines that the obtained outdoor ambient temperature and outdoor ambient humidity do not meet the preset conditions, then determine whether defrosting is required based on the outdoor ambient temperature and the outdoor heat exchanger coil temperature; the control unit is further configured to: if it is determined that the air conditioner needs to defrost, then control the air conditioner to enter the defrosting state.

[0016] Optionally, the acquisition unit acquires outdoor ambient temperature and outdoor ambient humidity by: acquiring the real-time outdoor ambient temperature and outdoor ambient humidity at the location of the air conditioner via a network connection.

[0017] In another aspect, the present invention provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the methods described above.

[0018] In another aspect, the present invention provides an air conditioner, including a processor, a memory, and a computer program stored in the memory that can run on the processor, wherein the processor executes the program to implement the steps of any of the methods described above.

[0019] In another aspect, the present invention provides an air conditioner including any of the defrosting control devices described above.

[0020] In another aspect, the present invention provides a computer program product, including a computer program that, when executed by a processor, implements the steps of any of the methods described above.

[0021] According to the technical solution of the present invention, the outdoor unit outlet air temperature is detected and judged in the condition for determining whether defrosting is needed, so as to improve the judgment and control of whether defrosting is needed, thereby ensuring that the frost layer on the outdoor unit heat exchanger can be completely melted in the low temperature and high humidity outdoor environment, while also ensuring the heating effect of the air conditioner and improving the user's heating comfort. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of an embodiment of the defrosting control method for an air conditioner provided by the present invention;

[0024] Figure 2 This is a schematic diagram of a specific embodiment of the defrosting control method for an air conditioner provided by the present invention;

[0025] Figure 3 This is a structural block diagram of an embodiment of the defrosting control device for an air conditioner provided by the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] This invention provides a defrosting control method for air conditioners.

[0029] Figure 1 This is a schematic diagram of an embodiment of the defrosting control method for air conditioners provided by the present invention.

[0030] like Figure 1 As shown, according to an embodiment of the present invention, the defrosting control method of the air conditioner includes at least steps S110, S120, S130 and S140.

[0031] Step S110: Obtain the outdoor ambient temperature and outdoor ambient humidity.

[0032] In one specific implementation, the real-time outdoor ambient temperature and humidity at the location of the air conditioner are obtained via a network connection. For example, when a user turns on the air conditioner and receives a signal to activate the heating mode, the air conditioner automatically connects to the network to obtain the local real-time outdoor ambient temperature and humidity.

[0033] In another specific embodiment, the outdoor ambient temperature and outdoor ambient humidity are detected by temperature detection devices and humidity detection devices (e.g., sensors or temperature-sensing bags) installed on the outdoor side.

[0034] Step S120: Determine whether the obtained outdoor ambient temperature and outdoor ambient humidity meet the preset conditions.

[0035] The preset conditions are used to determine whether the outdoor environment is in a low-temperature, high-humidity condition. Specifically, the preset conditions may include: the outdoor temperature being within a preset temperature range and the outdoor humidity reaching a preset humidity level. For example, the conditions for determining a low-temperature, high-humidity condition could be an outdoor temperature between -5 and 5°C, and humidity above 80%, a temperature at which the air conditioner's outdoor unit is prone to frost formation.

[0036] Step S130: If it is determined that the obtained outdoor ambient temperature and outdoor ambient humidity meet the preset conditions, then it is determined whether the air conditioner needs to defrost based on the outdoor heat exchanger coil temperature and the outdoor unit outlet air temperature.

[0037] Specifically, if the outdoor ambient temperature and humidity meet preset conditions, indicating a low-temperature, high-humidity outdoor environment, the system determines whether defrosting is required based on the outdoor heat exchanger coil temperature and the outdoor unit's outlet air temperature. For example, a temperature sensor is installed at the outdoor unit's outlet to detect the outlet air temperature. If the obtained outdoor ambient temperature and humidity do not meet preset conditions, the system determines whether defrosting is required based on the outdoor ambient temperature and the outdoor heat exchanger coil temperature (different outdoor ambient temperatures correspond to different defrosting pipe temperatures; under the current outdoor ambient temperature, defrosting begins when the outdoor heat exchanger coil temperature reaches the corresponding defrosting pipe temperature).

[0038] In other words, the conditions for initiating defrosting include: Condition 1: Determining whether defrosting is needed based on the outdoor ambient temperature and the outdoor unit's heat exchanger coil temperature; Condition 2: Determining whether defrosting is needed based on the outdoor ambient temperature, the outdoor unit's heat exchanger coil temperature, and the outdoor unit's outlet air temperature. If the outdoor environment is in a low-temperature, high-humidity condition, then Condition 2 is selected to determine whether defrosting is needed; otherwise, Condition 1 is used.

[0039] Specifically, the system acquires the outlet air temperature of the first outdoor unit and the heat exchanger coil temperature of the first outdoor unit when the air conditioner has been running for a first preset time, and the outlet air temperature of the second outdoor unit and the heat exchanger coil temperature of the second outdoor unit when the air conditioner has been running for a second preset time; it determines whether a first temperature difference between the outlet air temperature of the first outdoor unit and the heat exchanger coil temperature of the first outdoor unit is less than a second temperature difference between the outlet air temperature of the second outdoor unit and the heat exchanger coil temperature of the second outdoor unit; if the first temperature difference is less than the second temperature difference, and the second temperature difference is less than or equal to a first preset difference threshold, then the system acquires the outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit when the air conditioner has been running for a third preset time; based on the acquired outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit, it determines whether the air conditioner needs to defrost. If the first temperature difference is greater than or equal to the second temperature difference and / or the second temperature difference is greater than the first preset difference threshold, then it is detected whether the outdoor heat exchanger coil temperature has reached the preset defrosting pipe temperature; if the outdoor heat exchanger coil temperature has reached the preset defrosting pipe temperature, then it is determined that the air conditioner needs to defrost; otherwise, the third outdoor unit outlet air temperature and the third outdoor unit heat exchanger coil temperature are obtained when the air conditioner has been running for a third preset time; based on the obtained third outdoor unit outlet air temperature and third outdoor unit heat exchanger coil temperature, it is determined whether the air conditioner needs to defrost.

[0040] For example, when the air conditioner is turned on and running for the first preset time t1, the air outlet temperature T of the first outdoor unit is detected at this time. 外出风1 and the temperature T of the heat exchanger coil of the first outdoor unit 外管1 When the air conditioner is running for the second preset time t2, the outlet air temperature T of the second outdoor unit is measured at this time. 外出风2 Second outdoor unit heat exchanger coil temperature T 外管2 ; Calculate the outlet air temperature T of the first outdoor unit 外出风1 Temperature T of the heat exchanger coil of the second outdoor unit 外管1 The difference T 管温1 The outlet air temperature of the second outdoor unit, T 外出风2 Temperature T of the heat exchanger coil of the second outdoor unit 外管2 The difference T 管温2 ;like T 管温1 < T 管温2 ,and T 管温2 ≤T 温差1 When the air conditioner has been running for the third preset time t3, the outlet air temperature T of the third outdoor unit is detected. 外出风3 and the temperature T of the heat exchanger coil of the third outdoor unit 外管3 According to T外出风3 and T 外管3 Determine if defrosting is needed; otherwise, check the outdoor unit heat exchanger coil temperature T. 外管 If T 外管 Once the temperature for entering the defrosting tube is reached, defrosting begins.

[0041] It should be noted that if the outdoor unit's heat exchanger has a large amount of frost, meaning the frost is thick, it will increase the heat resistance of the heat exchanger and reduce the amount of heat absorbed. This reduced heat absorption will cause changes in the outdoor unit's outlet air temperature. When the air conditioner is in heating mode, the outdoor unit's heat exchanger acts as an evaporator. At this time, the refrigerant absorbs heat from the air. When the outdoor unit's heat exchanger and the air conditioner exchange sufficiently exchange heat, the outdoor unit's outlet air temperature will be significantly lower. At this point, the difference between the outdoor unit's outlet air temperature and the outdoor unit's heat exchanger coil temperature will be small. However, when the outdoor unit's heat exchanger absorbs less heat, the difference between the outdoor unit's outlet air temperature and the outdoor unit's heat exchanger coil temperature will increase. Therefore, by comparing the difference between the outdoor unit's outlet air temperature and the outdoor unit's heat exchanger coil temperature at different times, the frost condition of the outdoor unit's heat exchanger can be determined. If the difference between the two increases (…), the frost condition will be more pronounced. T 管温1 < T 管温2 This indicates that the amount of frost on the outdoor unit's heat exchanger is increasing, requiring defrosting to melt the frost and improve the air conditioner's heating efficiency. However, when the difference between the two values ​​increases but remains below the preset value T... 温差1 hour( T 管温1 < T 管温2 ,and T 管温2 ≤T 温差1 Therefore, it is necessary to combine the outdoor ambient temperature and the outdoor unit heat exchanger coil temperature to determine whether defrosting is required.

[0042] In one specific implementation, determining whether the air conditioner needs to defrost based on the obtained outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit includes: determining whether a third temperature difference between the outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit is greater than a second temperature difference; if the third temperature difference is greater than the second temperature difference and the third temperature difference is greater than a second preset difference threshold, then the air conditioner needs to defrost; if the third temperature difference is less than or equal to the second temperature difference and / or the third temperature difference is less than or equal to the second preset difference threshold, then detecting whether the outdoor heat exchanger coil temperature has reached a preset defrosting pipe temperature; if the outdoor heat exchanger coil temperature has reached the preset defrosting pipe temperature, then the air conditioner needs to defrost; otherwise, continuing to detect whether the outdoor heat exchanger coil temperature has reached the preset defrosting pipe temperature; if it has reached the defrosting pipe temperature, then the air conditioner needs to defrost; wherein, the second preset difference threshold is greater than the first preset difference threshold.

[0043] For example, when the air conditioner has been running for the third preset time t3, the outlet air temperature T of the third outdoor unit is detected. 外出风3 and the temperature T of the heat exchanger coil of the third outdoor unit 外管3 Calculate the outlet air temperature T of the third outdoor unit. 外出风3 Temperature T of the heat exchanger coil of the third outdoor unit 外管3 The difference T 管温3 ;like T 管温2 < T 管温3 ,and T 管温3 >T 温差2 If the temperature is high enough, then defrosting begins; otherwise, check the outdoor unit's heat exchanger coil temperature T. 外管 If T 外管 If the defrosting temperature is reached, defrosting begins; otherwise, continue monitoring the outdoor unit's heat exchanger coil temperature T. 外管 If T 外管 Once the temperature for entering the defrosting tube is reached, defrosting begins.

[0044] It should be noted that if the outdoor environment is under low temperature and high humidity conditions, and the temperature difference between the outdoor unit's outlet air temperature and the outdoor unit's heat exchanger coil is large, it indicates that the outdoor unit has accumulated a lot of frost, which has affected the heating effect of the indoor unit. In this case, defrosting is required to melt the frost layer on the outdoor unit's heat exchanger. Additionally, if it is determined that the amount of frost on the outdoor unit is increasing (…), T 管温3 >T 温差2 When the temperature reaches 100°C, defrosting begins, melting away the frost layer to prevent frost buildup and its impact on subsequent heating performance. Among these, T... 温差2 >T温差1 .

[0045] Furthermore, if the outdoor heat exchanger coil temperature does not reach the preset defrost pipe temperature during the aforementioned steps, the current outdoor unit outlet air temperature T is detected. 外出风 and outdoor unit heat exchanger coil temperature and T 外管 Determine the current outdoor unit outlet air temperature T. 外出风 outdoor unit heat exchanger coil temperature T 外管 The difference T 管温 Is it greater than the third preset difference threshold T? 温差3 The third preset difference threshold is greater than the second preset difference threshold; if it is determined that the difference is greater than the third preset difference threshold (T) 管温 >T 温差3 Or the outdoor unit heat exchanger coil temperature T 外管 If the preset defrosting pipe temperature is reached, it is determined that the air conditioner needs to defrost. Wherein, T... 温差.3 >T 温差2 >T 温差1 .

[0046] For example, measuring the outdoor unit's outlet air temperature T 外出风 outdoor unit heat exchanger coil temperature T 外管 Calculate the outdoor unit outlet air temperature T 外出风 outdoor unit heat exchanger coil temperature T 外管 The difference T 管温 If T 管温 >T 温差3 or T 外管 Once the defrosting temperature is reached, defrosting begins. Where T... 温差.3 >T 温差2 >T 温差1 .

[0047] Step S140: If it is determined that the air conditioner needs to defrost, then control the air conditioner to enter the defrosting state.

[0048] In other words, if it is determined that the air conditioner needs to defrost, the system will control the air conditioner to perform the defrosting operation to ensure the heating effect of the air conditioner.

[0049] To clearly illustrate the technical solution of the present invention, the execution flow of the defrosting control method for air conditioners provided by the present invention will be described below with reference to a specific embodiment.

[0050] Figure 2 This is a schematic diagram of a specific embodiment of the defrosting control method for an air conditioner provided by the present invention. Figure 2 The illustrated embodiment includes steps S1 to S10.

[0051] S1, the user turns on the air conditioner and receives a signal to start the heating mode;

[0052] S2, detects outdoor ambient temperature and outdoor ambient humidity;

[0053] S3, select the defrosting control conditions based on the detected outdoor ambient temperature and outdoor ambient humidity; if the outdoor ambient temperature is low and the outdoor ambient humidity is high at this time, then execute step S04.

[0054] If the outdoor environment is cold and humid, then condition 2 for entering defrost mode will be selected to determine whether defrosting is required. That is, the outdoor unit's heat exchanger coil temperature and the outdoor unit's air outlet temperature will be used to determine whether defrosting is required. If the outdoor environment is not cold and humid, then condition 1 for entering defrost mode will be used to determine whether defrosting is required. That is, the outdoor ambient temperature and the outdoor unit's heat exchanger coil temperature will be used to determine whether defrosting is required.

[0055] S4, when the air conditioner has been running for t1 time (e.g., t1min), measure the outdoor unit's outlet air temperature T at this time. 外出风1 outdoor unit heat exchanger coil temperature T 外管1 ;

[0056] S5, when the air conditioner has been running for t2 hours (e.g., t2min), measure the outdoor unit's outlet air temperature T at that time. 外出风2 outdoor unit heat exchanger coil temperature T 外管2 ;

[0057] S6, calculate the outdoor unit outlet air temperature T 外出风1 outdoor unit heat exchanger coil temperature T 外管1 The difference T 管温1 Outdoor unit outlet air temperature T 外出风2 outdoor unit heat exchanger coil temperature T 外管2 The difference T 管温2 ;

[0058] S7, if T 管温1 < T 管温2 ,and T 管温2 ≤T 温差1 If the condition is met, execute S8; otherwise, check the outdoor unit heat exchanger coil temperature T. 外管 If T 外管 If the defrosting temperature is reached, defrosting begins; otherwise, continue monitoring the outdoor unit's heat exchanger coil temperature T. 外管 If T 外管 Once the temperature for entering the defrosting tube is reached, defrosting begins.

[0059] S8, when the air conditioner has been running for t3 hours (e.g., t3min), the outdoor unit outlet air temperature T is detected. 外出风3 outdoor unit heat exchanger coil temperature T 外管3 Calculate the outdoor unit outlet air temperature T 外出风3 outdoor unit heat exchanger coil temperature T 外管3 The difference T 管温3 ;

[0060] S9, if T 管温2 < T 管温3 ,and T 管温3 >T 温差2 If the temperature is high enough, then defrosting begins; otherwise, check the outdoor unit's heat exchanger coil temperature T. 外管 If T 外管 If the temperature for entering the defrosting tube is reached, then defrosting begins; otherwise, execute S10.

[0061] S10, Detect outdoor unit outlet air temperature and outdoor unit heat exchanger coil temperature T 外出风 and T 外管 Calculate the outdoor unit outlet air temperature T 外出风 outdoor unit heat exchanger coil temperature T 外管 The difference T 管温 If T 管温 >T 温差3 or T 外管 Once the defrosting temperature is reached, defrosting begins. Where T... 温差.3 >T 温差2 >T 温差1 .

[0062] The present invention also provides a defrosting control device for an air conditioner.

[0063] Figure 3 This is a structural block diagram of an embodiment of the defrosting control device for an air conditioner provided by the present invention. Figure 3 As shown, the defrosting control device 100 includes: an acquisition unit 110, a first judgment unit 120, a second judgment unit 130, and a control unit 140.

[0064] The acquisition unit 110 is used to acquire outdoor ambient temperature and outdoor ambient humidity.

[0065] In one specific implementation, the real-time outdoor ambient temperature and humidity at the location of the air conditioner are obtained via a network connection. For example, when a user turns on the air conditioner and receives a signal to activate the heating mode, the air conditioner automatically connects to the network to obtain the local real-time outdoor ambient temperature and humidity.

[0066] In another specific embodiment, the outdoor ambient temperature and outdoor ambient humidity are detected by temperature detection devices and humidity detection devices (e.g., sensors or temperature-sensing bags) installed on the outdoor side.

[0067] The first judgment unit 120 is used to judge whether the outdoor ambient temperature and outdoor ambient humidity obtained by the acquisition unit 110 meet the preset conditions. The preset conditions include: the outdoor ambient temperature is within the preset temperature range and the outdoor ambient humidity reaches the preset humidity.

[0068] The preset conditions are used to determine whether the outdoor environment is in a low-temperature, high-humidity condition. Specifically, the preset conditions may include: the outdoor temperature being within a preset temperature range and the outdoor humidity reaching a preset humidity level. For example, the conditions for determining a low-temperature, high-humidity condition could be an outdoor temperature between -5 and 5°C, and humidity above 80%, a temperature at which the air conditioner's outdoor unit is prone to frost formation.

[0069] The second judgment unit 130 is used to determine whether the air conditioner needs to defrost if the first judgment unit 120 determines that the outdoor ambient temperature and outdoor ambient humidity obtained by the acquisition unit 110 meet the preset conditions, based on the outdoor heat exchanger coil temperature and the outdoor unit outlet air temperature.

[0070] Specifically, if the outdoor ambient temperature and humidity meet preset conditions, indicating a low-temperature, high-humidity outdoor environment, the system determines whether defrosting is required based on the outdoor heat exchanger coil temperature and the outdoor unit's outlet air temperature. For example, a temperature sensor is installed at the outdoor unit's outlet to detect the outlet air temperature. If the obtained outdoor ambient temperature and humidity do not meet preset conditions, the system determines whether defrosting is required based on the outdoor ambient temperature and the outdoor heat exchanger coil temperature (different outdoor ambient temperatures correspond to different defrosting pipe temperatures; under the current outdoor ambient temperature, defrosting begins when the outdoor heat exchanger coil temperature reaches the corresponding defrosting pipe temperature).

[0071] In other words, the conditions for initiating defrosting include: Condition 1: Determining whether defrosting is needed based on the outdoor ambient temperature and the outdoor unit's heat exchanger coil temperature; Condition 2: Determining whether defrosting is needed based on the outdoor ambient temperature, the outdoor unit's heat exchanger coil temperature, and the outdoor unit's outlet air temperature. If the outdoor environment is in a low-temperature, high-humidity condition, then Condition 2 is selected to determine whether defrosting is needed; otherwise, Condition 1 is used.

[0072] Specifically, the system acquires the outlet air temperature of the first outdoor unit and the heat exchanger coil temperature of the first outdoor unit when the air conditioner has been running for a first preset time, and the outlet air temperature of the second outdoor unit and the heat exchanger coil temperature of the second outdoor unit when the air conditioner has been running for a second preset time; it determines whether a first temperature difference between the outlet air temperature of the first outdoor unit and the heat exchanger coil temperature of the first outdoor unit is less than a second temperature difference between the outlet air temperature of the second outdoor unit and the heat exchanger coil temperature of the second outdoor unit; if the first temperature difference is less than the second temperature difference, and the second temperature difference is less than or equal to a first preset difference threshold, then the system acquires the outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit when the air conditioner has been running for a third preset time; based on the acquired outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit, it determines whether the air conditioner needs to defrost. If the first temperature difference is greater than or equal to the second temperature difference and / or the second temperature difference is greater than the first preset difference threshold, then it is detected whether the outdoor heat exchanger coil temperature has reached the preset defrosting pipe temperature; if the outdoor heat exchanger coil temperature has reached the preset defrosting pipe temperature, then it is determined that the air conditioner needs to defrost; otherwise, the third outdoor unit outlet air temperature and the third outdoor unit heat exchanger coil temperature are obtained when the air conditioner has been running for a third preset time; based on the obtained third outdoor unit outlet air temperature and third outdoor unit heat exchanger coil temperature, it is determined whether the air conditioner needs to defrost.

[0073] For example, when the air conditioner is turned on and running for the first preset time t1, the air outlet temperature T of the first outdoor unit is detected at this time. 外出风1 and the temperature T of the heat exchanger coil of the first outdoor unit 外管1 When the air conditioner is running for the second preset time t2, the outlet air temperature T of the second outdoor unit is measured at this time. 外出风2 Second outdoor unit heat exchanger coil temperature T 外管2 ; Calculate the outlet air temperature T of the first outdoor unit 外出风1 Temperature T of the heat exchanger coil of the second outdoor unit 外管1 The difference T 管温1 The outlet air temperature of the second outdoor unit, T 外出风2 Temperature T of the heat exchanger coil of the second outdoor unit 外管2 The difference T 管温2 ;like T 管温1 < T 管温2 ,and T 管温2 ≤T 温差1 When the air conditioner has been running for the third preset time t3, the outlet air temperature T of the third outdoor unit is detected. 外出风3 and the temperature T of the heat exchanger coil of the third outdoor unit 外管3 According to T外出风3 and T 外管3 Determine if defrosting is needed; otherwise, check the outdoor unit heat exchanger coil temperature T. 外管 If T 外管 Once the temperature for entering the defrosting tube is reached, defrosting begins.

[0074] It should be noted that if the outdoor unit's heat exchanger has a large amount of frost, meaning the frost is thick, it will increase the heat resistance of the heat exchanger and reduce the amount of heat absorbed. This reduced heat absorption will cause changes in the outdoor unit's outlet air temperature. When the air conditioner is in heating mode, the outdoor unit's heat exchanger acts as an evaporator. At this time, the refrigerant absorbs heat from the air. When the outdoor unit's heat exchanger and the air conditioner exchange sufficiently exchange heat, the outdoor unit's outlet air temperature will be significantly lower. At this point, the difference between the outdoor unit's outlet air temperature and the outdoor unit's heat exchanger coil temperature will be small. However, when the outdoor unit's heat exchanger absorbs less heat, the difference between the outdoor unit's outlet air temperature and the outdoor unit's heat exchanger coil temperature will increase. Therefore, by comparing the difference between the outdoor unit's outlet air temperature and the outdoor unit's heat exchanger coil temperature at different times, the frost condition of the outdoor unit's heat exchanger can be determined. If the difference between the two increases (…), the frost condition will be more pronounced. T 管温1 < T 管温2 This indicates that the amount of frost on the outdoor unit's heat exchanger is increasing, requiring defrosting to melt the frost and improve the air conditioner's heating efficiency. However, when the difference between the two values ​​increases but remains below the preset value T... 温差1 hour( T 管温1 < T 管温2 ,and T 管温2 ≤T 温差1 Therefore, it is necessary to combine the outdoor ambient temperature and the outdoor unit heat exchanger coil temperature to determine whether defrosting is required.

[0075] In one specific embodiment, the second determination unit 130 determines whether the air conditioner needs to defrost based on the acquired outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit. This includes: determining whether a third temperature difference between the outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit is greater than a second temperature difference; if the third temperature difference is greater than the second temperature difference and is greater than a second preset difference threshold, then the air conditioner needs to defrost; if the third temperature difference is less than or equal to the second temperature difference and / or less than or equal to the second preset difference threshold, then the outdoor heat exchanger coil temperature is detected to have reached a preset defrosting pipe temperature; if the outdoor heat exchanger coil temperature reaches the preset defrosting pipe temperature, then the air conditioner needs to defrost; otherwise, the outdoor heat exchanger coil temperature is continuously detected to have reached the preset defrosting pipe temperature, and if it does, the air conditioner needs to defrost; wherein the second preset difference threshold is greater than the first preset difference threshold.

[0076] For example, when the air conditioner has been running for the third preset time t3, the outlet air temperature T of the third outdoor unit is detected. 外出风3 and the temperature T of the heat exchanger coil of the third outdoor unit 外管3 Calculate the outlet air temperature T of the third outdoor unit. 外出风3 Temperature T of the heat exchanger coil of the third outdoor unit 外管3 The difference T 管温3 ;like T 管温2 < T 管温3 ,and T 管温3 >T 温差2 If the temperature is high enough, then defrosting begins; otherwise, check the outdoor unit's heat exchanger coil temperature T. 外管 If T 外管 If the defrosting temperature is reached, defrosting begins; otherwise, continue monitoring the outdoor unit's heat exchanger coil temperature T. 外管 If T 外管 Once the temperature for entering the defrosting tube is reached, defrosting begins.

[0077] It should be noted that if the outdoor environment is under low temperature and high humidity conditions, and there is a large difference between the outdoor unit's outlet air temperature and the outdoor unit's heat exchanger coil temperature, it indicates that the outdoor unit has accumulated a lot of frost, which has affected the indoor unit's heating performance. In this case, defrosting is necessary to melt the frost layer on the outdoor unit's heat exchanger. Simultaneously, when it is determined that the amount of frost on the outdoor unit is increasing, defrosting should begin to melt all the frost, preventing accumulated frost from affecting subsequent heating performance. Among these, T... 温差2 >T 温差1 .

[0078] Furthermore, if the outdoor heat exchanger coil temperature does not reach the preset defrost pipe temperature, the current outdoor unit outlet air temperature T is detected. 外出风 and outdoor unit heat exchanger coil temperature and T 外管 Determine the current outdoor unit outlet air temperature T. 外出风 outdoor unit heat exchanger coil temperature T 外管 The difference T 管温 Is it greater than the third preset difference threshold T? 温差3 The third preset difference threshold is greater than the second preset difference threshold; if it is determined that the difference is greater than the third preset difference threshold (T) 管温 >T 温差3 Or the outdoor unit heat exchanger coil temperature T 外管 If the preset defrosting pipe temperature is reached, it is determined that the air conditioner needs to defrost. Wherein, T... 温差.3 >T 温差2 >T 温差1 .

[0079] For example, measuring the outdoor unit's outlet air temperature T 外出风 outdoor unit heat exchanger coil temperature T 外管 Calculate the outdoor unit outlet air temperature T 外出风 outdoor unit heat exchanger coil temperature T 外管 The difference T 管温 If T 管温 >T 温差3 or T 外管 Once the defrosting temperature is reached, defrosting begins. Where T... 温差.3 >T 温差2 >T 温差1 .

[0080] The control unit 140 is configured to control the air conditioner to enter the defrosting state if the second determination unit 130 determines that the air conditioner needs to defrost.

[0081] In other words, if it is determined that the air conditioner needs to defrost, the system will control the air conditioner to perform the defrosting operation to ensure the heating effect of the air conditioner.

[0082] The present invention also provides a storage medium corresponding to the defrosting control method of the air conditioner, wherein a computer program is stored thereon, and when the program is executed by a processor, it implements the steps of any of the aforementioned methods.

[0083] The present invention also provides an air conditioner corresponding to the defrosting control method of the air conditioner, comprising a processor, a memory, and a computer program stored in the memory that can run on the processor, wherein the processor executes the program to implement the steps of any of the aforementioned methods.

[0084] The present invention also provides an air conditioner corresponding to the defrosting control device of the air conditioner, including the defrosting control device of any of the aforementioned air conditioners.

[0085] The present invention also provides a computer program product corresponding to the defrosting control method of the air conditioner, comprising a computer program that, when executed by a processor, implements the steps of any of the aforementioned methods.

[0086] In related technologies, air conditioners generally determine whether defrosting is needed by combining the outdoor ambient temperature and the temperature of the outdoor unit's heat exchanger coil. However, when the outdoor ambient temperature is low and the humidity is high, the outdoor unit's heat exchanger is more prone to frost formation, and the frost layer on the outdoor unit's heat exchanger is also relatively thick. This may result in incomplete defrosting of the outdoor unit's heat exchanger. Incomplete defrosting will lead to the accumulation of frost, further increasing the thermal resistance of the outdoor unit's heat exchanger, which will seriously affect the heat exchange effect of the outdoor unit's heat exchanger, thereby reducing the heating effect of the air conditioner.

[0087] Accordingly, the solution provided by the present invention adds the detection and judgment of the outdoor unit's air outlet temperature to the condition for determining whether defrosting is needed, so as to improve the judgment and control of whether defrosting is needed, thereby ensuring that the frost layer on the outdoor unit's heat exchanger can be completely melted in the low temperature and high humidity outdoor environment, while also ensuring the heating effect of the air conditioner and improving the user's heating comfort.

[0088] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0089] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0090] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0091] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to related technologies, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0092] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A defrosting control method for an air conditioner, characterized in that, include: Obtain outdoor ambient temperature and outdoor ambient humidity; Determine whether the obtained outdoor ambient temperature and outdoor ambient humidity meet preset conditions, the preset conditions including: the outdoor ambient temperature is within a preset temperature range and the outdoor ambient humidity reaches a preset humidity. If the outdoor ambient temperature and outdoor ambient humidity are determined to meet the preset conditions, then it is determined whether the air conditioner needs to defrost based on the outdoor heat exchanger coil temperature and the outdoor unit outlet air temperature. If it is determined that the air conditioner needs to defrost, then the air conditioner is controlled to enter the defrosting state.

2. The method according to claim 1, characterized in that, Determine whether the air conditioner needs defrosting based on the outdoor heat exchanger coil temperature and the outdoor unit outlet air temperature, including: The air outlet temperature of the first outdoor unit and the heat exchanger coil temperature of the first outdoor unit are obtained when the air conditioner is turned on and running for a first preset time, and the air outlet temperature of the second outdoor unit and the heat exchanger coil temperature of the second outdoor unit are obtained when the air conditioner is turned on and running for a second preset time. Determine whether the first temperature difference between the outlet air temperature of the first outdoor unit and the temperature of the heat exchanger coil of the first outdoor unit is less than the second temperature difference between the outlet air temperature of the second outdoor unit and the temperature of the heat exchanger coil of the second outdoor unit. If it is determined that the first temperature difference is less than the second temperature difference, and the second temperature difference is less than or equal to the first preset difference threshold, then the air outlet temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit are obtained when the air conditioner is turned on and running for a third preset time. Based on the obtained air outlet temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit, determine whether the air conditioner needs to be defrosted. If it is determined that the first temperature difference is greater than or equal to the second temperature difference and / or the second temperature difference is greater than the first preset difference threshold, then it is detected whether the outdoor heat exchanger coil temperature has reached the preset defrosting tube temperature. If the outdoor heat exchanger coil temperature reaches the preset defrosting pipe temperature, it is determined that the air conditioner needs to defrost; otherwise, the third outdoor unit outlet temperature and the third outdoor unit heat exchanger coil temperature are obtained when the air conditioner has been running for a third preset time; based on the obtained third outdoor unit outlet temperature and the third outdoor unit heat exchanger coil temperature, it is determined whether the air conditioner needs to defrost.

3. The method according to claim 2, characterized in that, Based on the obtained outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit, determine whether the air conditioner needs to defrost, including: Determine whether the third temperature difference between the outlet air temperature of the third outdoor unit and the heat exchanger coil temperature of the third outdoor unit is greater than the second temperature difference. If the third temperature difference is greater than the second temperature difference, and the third temperature difference is greater than the second preset difference threshold, then the air conditioner needs to defrost; the second preset difference threshold is greater than the first preset difference threshold. If the third temperature difference is determined to be less than or equal to the second temperature difference and / or the third temperature difference is less than or equal to the second preset difference threshold, then it is detected whether the outdoor heat exchanger coil temperature has reached the preset defrosting tube temperature. If the temperature of the outdoor heat exchanger coil reaches the preset defrosting pipe temperature, it is determined that the air conditioner needs to defrost.

4. The method according to any one of claims 1-3, characterized in that, Also includes: If the outdoor heat exchanger coil temperature does not reach the preset defrost tube temperature, then the current outdoor unit outlet air temperature and outdoor unit heat exchanger coil temperature are detected. Determine the current outdoor unit outlet air temperature T 外出风 Whether the difference between the temperature of the outdoor unit heat exchanger coil and the outdoor unit temperature is greater than a third preset difference threshold, wherein the third preset difference threshold is greater than the second preset difference threshold; If the difference is greater than the third preset difference threshold or the outdoor unit heat exchanger coil temperature reaches the preset defrosting pipe temperature, then the air conditioner needs to defrost.

5. The method according to any one of claims 1-3, characterized in that, Also includes: If it is determined that the obtained outdoor ambient temperature and outdoor ambient humidity do not meet the preset conditions, then it is determined whether defrosting is required based on the outdoor ambient temperature and the outdoor heat exchanger coil temperature. If it is determined that the air conditioner needs to defrost, then the air conditioner is controlled to enter the defrosting state.

6. The method according to any one of claims 1-3, characterized in that, Obtain outdoor ambient temperature and humidity, including: The real-time outdoor ambient temperature and humidity of the air conditioner's location are obtained via the internet.

7. A defrosting control method for an air conditioner, characterized in that, include: The acquisition unit is used to acquire outdoor ambient temperature and outdoor ambient humidity. The first judgment unit is used to judge whether the outdoor ambient temperature and outdoor ambient humidity obtained by the acquisition unit meet the preset conditions. The preset conditions include: the outdoor ambient temperature is within the preset temperature range and the outdoor ambient humidity reaches the preset humidity. The second judgment unit is used to determine whether the air conditioner needs to defrost if the first judgment unit determines that the outdoor ambient temperature and outdoor ambient humidity obtained by the acquisition unit meet the preset conditions, based on the outdoor heat exchanger coil temperature and the outdoor unit outlet air temperature. The control unit is configured to control the air conditioner to enter the defrosting state if the second determination unit determines that the air conditioner needs to defrost.

8. A storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the steps of the method according to any one of claims 1-6.

9. An air conditioner, characterized in that, It includes a processor, a memory, and a computer program stored in the memory that can run on the processor, wherein the processor executes the program to implement the steps of any of the methods of claims 1-7, or includes the defrosting control device as described in claim 7.

10. A computer program product, characterized in that, Includes a computer program, which, when executed by a processor, implements the steps of the method according to any one of claims 1-6.

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