Air conditioner defrosting control method and device, air conditioner and storage medium

Abstract

This disclosure relates to an air conditioner defrosting control method, device, air conditioner, and storage medium, belonging to the air conditioning field. The method includes: under conditions meeting defrosting requirements, executing a first defrosting mode according to set operating parameters. The first defrosting mode uses hot gas defrosting. The operating parameters include one or more of the following: compressor operating frequency, electronic expansion valve opening, outdoor fan speed, and indoor fan speed during the defrosting phase. Then, determining whether the defrosting effect of the first defrosting mode meets preset requirements. If the defrosting effect does not meet the preset requirements, switching the defrosting mode from the first defrosting mode to a second defrosting mode. The second defrosting mode uses a reverse circulation defrosting method. This technical solution can improve the problem of sudden temperature drops during defrosting while ensuring defrosting effectiveness, thereby enhancing the user experience.

Description

Technical Field

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

[0002] After a period of use, air conditioners often develop frost, affecting their efficiency. In conventional inverter air conditioners, the defrosting method is reverse circulation, which typically involves switching the system flow from heating to cooling mode, using the heat from the compressor and refrigerant to complete the defrosting process. This reverse circulation defrosting method requires the absorption of a significant amount of heat from the room during defrosting, resulting in a substantial drop in indoor temperature and a poor user experience. Summary of the Invention

[0003] To overcome the problems existing in the related technologies, this disclosure provides an air conditioning defrosting control method, device, air conditioner, and storage medium.

[0004] According to a first aspect of the present disclosure, an air conditioning control method is provided, the method comprising:

[0005] When the defrosting conditions are met, the first defrosting mode is executed according to the set operating parameters; wherein, the first defrosting mode is to defrost using hot gas defrosting, and the operating parameters include one or more of the following during the defrosting stage: compressor operating frequency, electronic expansion valve opening, external fan speed, and internal fan speed;

[0006] Determine whether the defrosting effect of the first defrosting mode meets the preset requirements;

[0007] If the defrosting effect does not meet the preset requirements, the defrosting mode is switched from the first defrosting mode to the second defrosting mode; wherein, the second defrosting mode is to perform defrosting using a reverse cycle defrosting method.

[0008] Optionally, determining whether the defrosting effect of the first defrosting mode meets the preset requirements includes:

[0009] When the first defrosting mode continues for a first duration, it is determined whether the defrosting effect of the first defrosting mode meets the first preset requirements. The first preset requirements include one or more of the following temperature requirements: outdoor heat exchanger tube temperature, exhaust temperature, and indoor heat exchanger tube temperature.

[0010] Optionally, determining whether the defrosting effect of the first defrosting mode meets the first preset requirement when the first defrosting mode continues for a first duration includes:

[0011] If, during the first duration of the first defrosting mode, the outdoor heat exchanger tube temperature is greater than or equal to the first external tube temperature threshold, the exhaust temperature is greater than or equal to the first exhaust temperature threshold, and the indoor heat exchanger tube temperature is greater than or equal to the first internal tube temperature threshold, then the defrosting effect of the first defrosting mode meets the first preset requirement.

[0012] If, during the first duration of the first defrosting mode, the outdoor heat exchanger tube temperature is less than the first external tube temperature threshold, or the exhaust temperature is less than the first exhaust temperature threshold, or the indoor heat exchanger tube temperature is less than the first internal tube temperature threshold, then it is determined that the defrosting effect of the first defrosting mode does not meet the first preset requirement.

[0013] Optionally, determining whether the defrosting effect of the first defrosting mode meets the preset requirements further includes:

[0014] If the first defrosting mode continues for a second duration, determine whether the defrosting effect of the defrosting mode meets the second preset requirement; the second preset requirement includes one or more of the following temperature requirements: outdoor heat exchanger tube temperature, exhaust temperature, and indoor heat exchanger tube temperature.

[0015] The first preset requirement is different from the second preset requirement, and the first duration is shorter than the second duration.

[0016] Optionally, determining whether the defrosting effect of the first defrosting mode meets the second preset requirement when the first defrosting mode continues for a second duration includes:

[0017] If, during the second duration of the first defrosting mode, the outdoor heat exchanger tube temperature is greater than or equal to the second outer tube temperature threshold, the exhaust temperature is greater than or equal to the second exhaust temperature threshold, and the indoor heat exchanger tube temperature is greater than or equal to the second inner tube temperature threshold, then the defrosting effect of the first defrosting mode meets the second preset requirement.

[0018] If, during the second duration of the first defrosting mode, the outdoor heat exchanger tube temperature is less than the second outer tube temperature threshold, or the exhaust temperature is less than the second exhaust temperature threshold, or the indoor heat exchanger tube temperature is less than the second inner tube temperature threshold, then it is determined that the defrosting effect of the first defrosting mode does not meet the second preset requirement.

[0019] Optionally, the step of executing the first defrost mode according to the set operating parameters when the defrost conditions are met includes:

[0020] If the defrosting conditions are met, the compressor operating frequency is adjusted to the preset defrosting frequency;

[0021] Adjust the opening of the electronic expansion valve to the preset defrosting opening;

[0022] Adjust the speed of the external fan to zero;

[0023] The operating status of the indoor fan is determined based on the indoor ambient temperature, outdoor ambient temperature, outdoor heat exchanger tube temperature, and indoor heat exchanger tube temperature.

[0024] Optionally, determining the operating status of the indoor fan based on the indoor ambient temperature, outdoor ambient temperature, outdoor heat exchanger tube temperature, and indoor heat exchanger tube temperature includes:

[0025] When the sum of the indoor ambient temperature and the outdoor ambient temperature is greater than or equal to a set temperature value, the indoor ambient temperature is greater than or equal to an indoor ambient temperature threshold, and the outdoor heat exchanger tube temperature is greater than or equal to an outdoor heat exchanger tube temperature threshold.

[0026] If the temperature of the indoor heat exchanger tube is greater than or equal to the third inner tube temperature threshold, the indoor fan is turned on.

[0027] If the temperature of the indoor heat exchanger tube is less than or equal to the fourth inner tube temperature threshold, the indoor fan will be stopped.

[0028] If the temperature of the indoor heat exchanger tube is greater than the fourth inner tube temperature threshold but less than the third inner tube temperature threshold, the original state of the indoor fan is maintained.

[0029] Optionally, before executing the first defrost mode according to the set operating parameters, the method further includes: entering a defrost preparation stage; the defrost preparation stage includes:

[0030] Within the third time period, the operating frequency of the compressor is increased to the upper limit of the frequency corresponding to the outdoor environment at the current moment;

[0031] Increase the indoor ambient temperature compensation value by the set value.

[0032] Optionally, after the defrost preparation stage and before entering the first defrost mode, the method further includes: entering a defrost heat storage stage; the defrost heat storage stage includes:

[0033] Obtain the indoor fan speed, indoor ambient temperature, and indoor heat exchanger tube temperature at the moment of entering the defrosting and heat storage stage;

[0034] The speed of the indoor fan is adjusted based on the indoor fan speed, the indoor ambient temperature, the indoor heat exchanger tube temperature, and the target tube temperature of the indoor heat exchanger at the time of the frost storage stage.

[0035] Optionally, adjusting the indoor fan speed based on the indoor fan speed, the indoor ambient temperature, the indoor heat exchanger tube temperature, and the target tube temperature of the indoor heat exchanger at the time of the frost storage stage includes:

[0036] Obtain the temperature difference between the indoor heat exchanger tube temperature and the target tube temperature at the time of the frost storage stage;

[0037] When the temperature difference is less than or equal to the first temperature difference threshold, the rotation speed of the internal fan remains constant.

[0038] When the temperature difference is greater than the first temperature difference threshold and less than or equal to the second temperature difference threshold, the speed of the internal fan is reduced by the first speed difference.

[0039] When the temperature difference is greater than the second temperature difference threshold and less than or equal to the third temperature difference threshold, the speed of the internal fan is reduced by the second speed difference.

[0040] When the temperature difference is greater than the third temperature difference threshold, the speed of the internal fan is reduced by the third speed difference.

[0041] Wherein, the first temperature difference threshold is less than the second temperature difference threshold, and the second temperature difference threshold is less than the third temperature difference threshold.

[0042] According to a second aspect of the present disclosure, an air conditioning defrosting control device is provided, the device comprising:

[0043] The defrosting module is configured to execute a first defrosting mode according to set operating parameters when defrosting conditions are met; wherein, the first defrosting mode is to defrost using hot gas defrosting, and the operating parameters include one or more of the following during the defrosting stage: compressor operating frequency, electronic expansion valve opening, external fan speed, and internal fan speed;

[0044] The judgment module is configured to determine whether the defrosting effect of the first defrosting mode meets the preset requirements;

[0045] The switching module is configured to switch the defrosting mode from the first defrosting mode to the second defrosting mode when the defrosting effect does not meet the preset requirements; wherein the second defrosting mode is to perform defrosting using a reverse cycle defrosting method.

[0046] According to a third aspect of the present disclosure, an air conditioner is provided, comprising:

[0047] processor;

[0048] Memory used to store processor-executable instructions;

[0049] The processor is configured to execute the executable instructions to implement the steps of the air conditioning defrosting control method according to any one of the first aspects of this disclosure.

[0050] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided, having stored thereon computer program instructions that, when executed by a processor, implement the steps of the air conditioning defrosting control method provided in the first aspect of the present disclosure.

[0051] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0052] In the above technical solution, under the condition that the defrosting conditions are met, a first defrosting mode is executed according to the set operating parameters. This first defrosting mode uses hot gas defrosting. The operating parameters include one or more of the following: compressor operating frequency, electronic expansion valve opening, outdoor fan speed, and indoor fan speed during the defrosting stage. Then, it is determined whether the defrosting effect of the first defrosting mode meets the preset requirements. If the defrosting effect does not meet the preset requirements, the defrosting mode is switched from the first defrosting mode to a second defrosting mode. This second defrosting mode uses a reverse circulation defrosting method. Through this technical solution, when defrosting the air conditioner, hot gas defrosting is prioritized, and when hot gas defrosting fails to meet the requirements, the system switches to a reverse circulation defrosting method. This ensures the defrosting effect while mitigating the problem of a sudden drop in indoor temperature during the defrosting process, thereby improving the user experience.

[0053] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0054] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0055] Figure 1 This is a flowchart illustrating an air conditioning defrosting control method according to an exemplary embodiment.

[0056] Figure 2 This is a flowchart illustrating an air conditioning defrosting control method according to an exemplary embodiment.

[0057] Figure 3 This is a flowchart illustrating an air conditioning defrosting control method according to an exemplary embodiment.

[0058] Figure 4 This is a flowchart illustrating an air conditioning defrosting control method according to an exemplary embodiment.

[0059] Figure 5 This is a flowchart illustrating an air conditioning defrosting control method according to an exemplary embodiment.

[0060] Figure 6 This is a flowchart illustrating an air conditioning defrosting control method according to an exemplary embodiment.

[0061] Figure 7 This is a block diagram illustrating an air conditioning defrosting device according to an exemplary embodiment.

[0062] Figure 8 This is a block diagram illustrating an air conditioner according to an exemplary embodiment. Detailed Implementation

[0063] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0064] It should be noted that all actions involving the acquisition of signals, information, or data in this disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with authorization from the owner of the relevant device.

[0065] Figure 1 This is a flowchart illustrating an air conditioner defrosting control method according to an exemplary embodiment, such as... Figure 1 As shown, the method includes the following steps.

[0066] In step S11, if the defrosting conditions are met, the first defrosting mode is executed according to the set operating parameters; wherein, the first defrosting mode is to defrost using hot gas defrosting, and the operating parameters include one or more of the following: compressor operating frequency, electronic expansion valve opening, external fan speed, and internal fan speed during the defrosting stage.

[0067] Hot gas defrosting is a heating defrosting mode in heat pump units that controls flow through an electronic expansion valve. During defrosting, the air conditioner continues to operate in heating mode, with the electronic expansion valve opening wider or fully open. This ensures the refrigerant enters the condenser at a relatively high temperature for heat exchange and defrosting. After defrosting, the refrigerant returns to the compressor. Because the high-temperature refrigerant flows through the indoor unit's evaporator first during defrosting, the evaporator maintains a consistently high temperature. Therefore, this hot gas defrosting process allows for continuous heating of the room, preventing sudden drops in room temperature.

[0068] In step S12, it is determined whether the defrosting effect of the first defrosting mode meets the preset requirements.

[0069] The defrosting effect can be judged based on conditions such as the outdoor heat exchanger tube temperature, exhaust temperature, and indoor heat exchanger tube temperature.

[0070] In step S13, if the defrosting effect does not meet the preset requirements, the defrosting mode is switched from the first defrosting mode to the second defrosting mode; wherein, the second defrosting mode is to perform defrosting using a reverse cycle defrosting method.

[0071] In this reverse-cycle defrosting method, the system switches the flow route from heating mode to cooling mode during defrosting, using the heat from the compressor and refrigerant for defrosting.

[0072] In the above technical solution, under the condition that the defrosting conditions are met, a first defrosting mode is executed according to the set operating parameters. This first defrosting mode uses hot gas defrosting. The operating parameters include one or more of the following: compressor operating frequency, electronic expansion valve opening, outdoor fan speed, and indoor fan speed during the defrosting stage. Then, it is determined whether the defrosting effect of the first defrosting mode meets the preset requirements. If the defrosting effect does not meet the preset requirements, the defrosting mode is switched from the first defrosting mode to a second defrosting mode. This second defrosting mode uses a reverse circulation defrosting method. Through this technical solution, when defrosting the air conditioner, hot gas defrosting is prioritized, and when hot gas defrosting fails to meet the requirements, the system switches to a reverse circulation defrosting method. This ensures the defrosting effect while mitigating the problem of a sudden drop in indoor temperature during the defrosting process, thereby improving the user experience.

[0073] Optionally, the step S12 above, which involves determining whether the defrosting effect of the first defrosting mode meets the preset requirements, may include:

[0074] When the first defrosting mode continues for a first duration, it is determined whether the defrosting effect of the first defrosting mode meets the first preset requirements. The first preset requirements include one or more of the following temperature requirements: outdoor heat exchanger tube temperature, exhaust temperature, and indoor heat exchanger tube temperature.

[0075] Figure 2 This is a flowchart illustrating an air conditioner defrosting control method according to an exemplary embodiment, such as... Figure 2 As shown, determining whether the defrosting effect of the first defrosting mode meets the first preset requirement when the first defrosting mode continues for a first duration may include the following steps:

[0076] Step S121: If, during the first duration of the first defrosting mode, the outdoor heat exchanger tube temperature is greater than or equal to the first external tube temperature threshold, the exhaust temperature is greater than or equal to the first exhaust temperature threshold, and the indoor heat exchanger tube temperature is greater than or equal to the first internal tube temperature threshold, then it is determined that the defrosting effect of the first defrosting mode meets the first preset requirement.

[0077] Step S122: If, during the first duration of the first defrosting mode, the outdoor heat exchanger tube temperature is lower than the first external tube temperature threshold, or the exhaust temperature is lower than the first exhaust temperature threshold, or the indoor heat exchanger tube temperature is lower than the first internal tube temperature threshold, then it is determined that the defrosting effect of the first defrosting mode does not meet the first preset requirement.

[0078] For example, the defrosting process of an air conditioner can last for 10 minutes, with the first duration being 2 minutes. At the 2-minute mark of the defrosting process, the outdoor heat exchanger pipe temperature (T) is determined. 外管 ) and the first outer tube temperature threshold (T wh1 The relationship between the magnitudes of ) and the exhaust temperature (T) 排气 ) and the first exhaust temperature threshold (T) p1 The relationship between the magnitudes of the two and the indoor heat exchanger tube temperatures (T) 内管 ) and the first inner tube temperature threshold (T nh1 The size relationship of ).

[0079] If within that 2-minute period, {T} 外管 ≥T wh1 And T 排气 ≥T p1 And T 内管 ≥T nh1 This condition determines that the defrosting effect of the first defrosting mode meets the first preset requirement;

[0080] If within that 2-minute period, {T} 外管 <T wh1 , or T 排气 <T p1 , or T 内管 <T nh1 This condition determines that the defrosting effect of the first defrosting mode does not meet the first preset requirement.

[0081] Optionally, step S12, which involves determining whether the defrosting effect of the first defrosting mode meets the preset requirements, may further include:

[0082] If the first defrosting mode continues for a second duration, determine whether the defrosting effect of the defrosting mode meets the second preset requirement; the second preset requirement includes one or more of the following temperature requirements: outdoor heat exchanger tube temperature, exhaust temperature, and indoor heat exchanger tube temperature.

[0083] The first preset requirement and the second preset requirement are different, and the first duration is shorter than the second duration.

[0084] Understandably, judging the defrosting effect of the first defrosting mode at the second minute is because in certain situations, such as strong winds outdoors, excessive heat dissipation of the outdoor unit, and the outdoor heat exchanger tube temperature failing to reach the preset conditions, the conditions required for the first defrosting mode cannot be executed. Therefore, it is necessary to switch to the conventional reverse circulation defrosting mode to ensure the defrosting effect.

[0085] Figure 3 This is a flowchart illustrating an air conditioner defrosting control method according to an exemplary embodiment, such as... Figure 3 As shown, when the first defrosting mode continues for a second duration, determining whether the defrosting effect of the defrosting mode meets the second preset requirement may include the following steps:

[0086] Step S123: During the second duration of the first defrosting mode, if the outdoor heat exchanger tube temperature is greater than or equal to the second outer tube temperature threshold, the exhaust temperature is greater than or equal to the second exhaust temperature threshold, and the indoor heat exchanger tube temperature is greater than or equal to the second inner tube temperature threshold, then it is determined that the defrosting effect of the first defrosting mode meets the second preset requirement.

[0087] Step S124: If, during the second duration of the first defrosting mode, the outdoor heat exchanger tube temperature is lower than the second outer tube temperature threshold, or the exhaust temperature is lower than the second exhaust temperature threshold, or the indoor heat exchanger tube temperature is lower than the second inner tube temperature threshold, then it is determined that the defrosting effect of the first defrosting mode does not meet the second preset requirement.

[0088] For example, the defrosting process of an air conditioner can last for 10 minutes, and the second duration can be 7 minutes. At the 7th minute of the defrosting process, when the defrosting process is about to end, the outdoor heat exchanger pipe temperature (T) is determined. 外管 ) and the second outer tube temperature threshold (T wh2 The relationship between the magnitudes of ) and the exhaust temperature (T) 排气 ) and the second exhaust temperature threshold (T p2 The relationship between the magnitudes of the two and the indoor heat exchanger tube temperatures (T) 内管 ) and the second inner tube temperature threshold (T nh2 The size relationship of ).

[0089] If within that 7-minute period, {T} 外管 ≥T wh2 And T 排气 ≥T p2 And T 内管 ≥T nh2This condition determines that the defrosting effect of the first defrosting mode meets the second preset requirement;

[0090] If within that 7-minute period, {T} 外管 <T wh2 , or T 排气 <T p2 , or T 内管 <T nh2 This condition determines that the defrosting effect of the first defrosting mode does not meet the second preset requirement.

[0091] The difference between the second preset requirement and the first preset requirement is: T wh1 <T wh2 T p1 <T p2 and T nh1 <T nh2 .

[0092] Understandably, at the 7th minute, when the defrosting process in the first defrosting mode is about to end, the defrosting effect is judged again. This judgment condition is set to check whether the defrosting effect of the first defrosting mode, which has been completed for a relatively long time, meets the expectations. If it does not meet the expectations, it means that the effect of the second half of this defrosting cannot completely melt the frost. Even if the hot defrosting is performed for a longer time, the expected defrosting effect cannot be achieved. Therefore, it is necessary to switch to the regular reverse cycle defrosting mode.

[0093] Figure 4 This is a flowchart illustrating an air conditioner defrosting control method according to an exemplary embodiment, such as... Figure 4 As shown, step S11 above, which describes executing the first defrost mode according to the set operating parameters when the defrost conditions are met, may include the following steps:

[0094] Step S111: If the defrosting conditions are met, adjust the compressor operating frequency to the preset defrosting frequency.

[0095] Step S112: Adjust the opening of the electronic expansion valve to the preset defrosting opening.

[0096] For example, the preset defrosting frequency can typically be 100Hz, and the preset defrosting opening can be the maximum opening of the electronic expansion valve, typically 480 steps.

[0097] Step S113: Adjust the speed of the external fan to zero.

[0098] Step S114: Determine the operating status of the indoor fan based on the indoor ambient temperature, outdoor ambient temperature, outdoor heat exchanger tube temperature, and indoor heat exchanger tube temperature.

[0099] Furthermore, if the sum of the indoor ambient temperature and the outdoor ambient temperature is greater than or equal to a set temperature value, the indoor ambient temperature is greater than or equal to an indoor ambient temperature threshold, and the outdoor heat exchanger tube temperature is greater than or equal to an outdoor heat exchanger tube temperature threshold,

[0100] If the temperature of the indoor heat exchanger tube is greater than or equal to the third inner tube temperature threshold, the indoor fan will be turned on.

[0101] If the temperature of the indoor heat exchanger tube is less than or equal to the fourth inner tube temperature threshold, the indoor fan will be stopped.

[0102] If the temperature of the indoor heat exchanger tube is greater than the fourth inner tube temperature threshold but less than the third inner tube temperature threshold, the original state of the indoor fan is maintained.

[0103] For example, when the indoor heat exchanger tube temperature (T) 内管 When the temperature is greater than or equal to 37℃, turn on the internal fan; when T 内管 When the temperature is ≤33℃, stop the internal fan; when the temperature is <T 内管 When the temperature is below 37℃, maintain the original state of the internal fan.

[0104] During the defrosting process, if the internal fan is turned on, its speed can be maintained between 350-650 r / min.

[0105] Figure 5 This is a flowchart illustrating an air conditioner defrosting control method according to an exemplary embodiment, such as... Figure 5 As shown, before executing the first defrost mode according to the set operating parameters as described in step S11 above, the method may further include: entering a defrost preparation stage; the defrost preparation stage may include the following steps:

[0106] Step S14: Within the third time period, increase the operating frequency of the compressor to the upper limit of the frequency corresponding to the outdoor environment at the current moment.

[0107] For example, the third duration can be 3 minutes, and in the case of air conditioning heating, the upper limit of the frequency corresponding to the outdoor environment at the current moment can be 100Hz.

[0108] Step S15: Increase the indoor ambient temperature compensation value by the set value.

[0109] Understandably, when the air conditioner is set to 25℃, it will generally trigger the temperature-reaching shutdown when the indoor temperature reaches 27 or 28℃. During the defrosting preparation stage, the indoor ambient temperature compensation value is increased by 1-2℃, and the temperature-reaching shutdown will be triggered when the indoor temperature reaches 29 or 30℃, to prevent the temperature-reaching shutdown from being triggered during the frequency increase process.

[0110] Figure 6This is a flowchart illustrating an air conditioner defrosting control method according to an exemplary embodiment, such as... Figure 6 As shown, after the above defrosting preparation and before entering the first defrosting mode, the method may further include: entering a defrosting heat storage stage; the defrosting heat storage stage includes the following steps:

[0111] Step S16: Obtain the indoor fan speed, indoor ambient temperature, and indoor heat exchanger tube temperature at the moment of entering the defrosting and heat storage stage.

[0112] For example, let R1 be the speed of the indoor fan when the defrosting and heat storage stage begins, and let T be the indoor ambient temperature. n1 The indoor heat exchanger tube temperature is denoted as T. nh3 .

[0113] Step S17: Adjust the speed of the indoor fan according to the indoor fan speed, indoor ambient temperature, indoor heat exchanger tube temperature and target tube temperature at the time of the frost heat storage stage.

[0114] For example, the target fan speed during the defrosting and heat storage phase is denoted as R. m .

[0115] Furthermore, step S17, which involves adjusting the internal fan speed based on the internal fan speed, the indoor ambient temperature, the indoor heat exchanger tube temperature, and the target tube temperature of the indoor heat exchanger at the time of the frost storage stage, may include:

[0116] Obtain the temperature difference between the indoor heat exchanger tube temperature and the target tube temperature at the moment of the frost storage stage;

[0117] When the temperature difference is less than or equal to the first temperature difference threshold, the speed of the internal fan remains constant.

[0118] When the temperature difference is greater than the first temperature difference threshold and less than or equal to the second temperature difference threshold, the speed of the internal fan is reduced by the first speed difference.

[0119] When the temperature difference is greater than the second temperature difference threshold and less than or equal to the third temperature difference threshold, the speed of the internal fan is reduced by the second speed difference.

[0120] When the temperature difference is greater than the third temperature difference threshold, the speed of the internal fan is reduced by the third speed difference.

[0121] Wherein, the first temperature difference threshold is less than the second temperature difference threshold, and the second temperature difference threshold is less than the third temperature difference threshold.

[0122] For example, the method for adjusting the speed of the above-mentioned internal fan is shown in the table below:

[0123] <![CDATA[△T=T 蓄热阶段目标管温 -T nh3 ]]> <![CDATA[Indoor fan target speed R during defrosting heat storage stage m > <![CDATA[△T≤ΔT1℃]]> Maintain current speed <![CDATA[ΔT1℃<△T≤ΔT2℃]]> <![CDATA[Reduce by ΔR1 based on the current rotational speed]]> <![CDATA[ΔT2℃<△T≤ΔT3℃]]> <![CDATA[Reduce by ΔR2 based on the current rotational speed]]> <![CDATA[ΔT3℃<△T]]> <![CDATA[Reduce by ΔR3 based on the current rotational speed]]>

[0124] In the above technical solution, under the condition that the defrosting conditions are met, a first defrosting mode is executed according to the set operating parameters. This first defrosting mode uses hot gas defrosting. The operating parameters include one or more of the following: compressor operating frequency, electronic expansion valve opening, outdoor fan speed, and indoor fan speed during the defrosting stage. Then, it is determined whether the defrosting effect of the first defrosting mode meets the preset requirements. If the defrosting effect does not meet the preset requirements, the defrosting mode is switched from the first defrosting mode to a second defrosting mode. This second defrosting mode uses a reverse circulation defrosting method. Through this technical solution, when defrosting the air conditioner, hot gas defrosting is prioritized, and when hot gas defrosting fails to meet the requirements, the system switches to a reverse circulation defrosting method. This ensures the defrosting effect while mitigating the problem of a sudden drop in indoor temperature during the defrosting process, thereby improving the user experience.

[0125] Figure 7 This is a block diagram illustrating an air conditioner defrosting control device according to an exemplary embodiment. (Refer to...) Figure 7 The device includes a defrosting module 710, a judgment module 720, and a switching module 730.

[0126] The defrosting module 710 is configured to execute a first defrosting mode according to set operating parameters when the defrosting conditions are met; wherein, the first defrosting mode is to defrost using hot gas defrosting, and the operating parameters include one or more of the following: compressor operating frequency, electronic expansion valve opening, external fan speed, and internal fan speed during the defrosting stage;

[0127] The judgment module 720 is configured to determine whether the defrosting effect of the first defrosting mode meets the preset requirements;

[0128] The switching module 730 is configured to switch the defrosting mode from the first defrosting mode to the second defrosting mode when the defrosting effect does not meet the preset requirements; wherein the second defrosting mode is to perform defrosting using a reverse cycle defrosting method.

[0129] Optionally, the judgment module 720 is configured as follows:

[0130] When the first defrosting mode continues for a first duration, it is determined whether the defrosting effect of the first defrosting mode meets the first preset requirements. The first preset requirements include one or more of the following temperature requirements: outdoor heat exchanger tube temperature, exhaust temperature, and indoor heat exchanger tube temperature.

[0131] Optionally, the determination module 720 includes a first determination submodule, which is configured to:

[0132] If, during the first duration of the first defrosting mode, the outdoor heat exchanger tube temperature is greater than or equal to the first external tube temperature threshold, the exhaust temperature is greater than or equal to the first exhaust temperature threshold, and the indoor heat exchanger tube temperature is greater than or equal to the first internal tube temperature threshold, then the defrosting effect of the first defrosting mode meets the first preset requirement.

[0133] If, during the first duration of the first defrosting mode, the outdoor heat exchanger tube temperature is lower than the first external tube temperature threshold, or the exhaust temperature is lower than the first exhaust temperature threshold, or the indoor heat exchanger tube temperature is lower than the first internal tube temperature threshold, then it is determined that the defrosting effect of the first defrosting mode does not meet the first preset requirement.

[0134] Optionally, the judgment module 720 is also configured as follows:

[0135] If the first defrosting mode continues for a second duration, determine whether the defrosting effect of the defrosting mode meets the second preset requirement; the second preset requirement includes one or more of the following temperature requirements: outdoor heat exchanger tube temperature, exhaust temperature, and indoor heat exchanger tube temperature.

[0136] The first preset requirement and the second preset requirement are different, and the first duration is shorter than the second duration.

[0137] Optionally, the first determining submodule is also configured as follows:

[0138] If, during the second duration of the first defrosting mode, the outdoor heat exchanger tube temperature is greater than or equal to the second outer tube temperature threshold, the exhaust temperature is greater than or equal to the second exhaust temperature threshold, and the indoor heat exchanger tube temperature is greater than or equal to the second inner tube temperature threshold, then the defrosting effect of the first defrosting mode meets the second preset requirement.

[0139] If, during the second duration of the first defrosting mode, the outdoor heat exchanger tube temperature is lower than the second outer tube temperature threshold, or the exhaust temperature is lower than the second exhaust temperature threshold, or the indoor heat exchanger tube temperature is lower than the second inner tube temperature threshold, then it is determined that the defrosting effect of the first defrosting mode does not meet the second preset requirement.

[0140] Optionally, the defrosting module 710 includes: an adjustment submodule and a second determination submodule;

[0141] This adjustment submodule is configured as follows:

[0142] If the defrosting conditions are met, the compressor operating frequency is adjusted to the preset defrosting frequency;

[0143] Adjust the opening of the electronic expansion valve to the preset defrosting opening;

[0144] Adjust the speed of the external fan to zero;

[0145] The second determining submodule is configured to determine the operating status of the indoor fan based on the indoor ambient temperature, outdoor ambient temperature, outdoor heat exchanger tube temperature, and indoor heat exchanger tube temperature.

[0146] Optionally, the second determining submodule is configured as follows:

[0147] When the sum of the indoor ambient temperature and the outdoor ambient temperature is greater than or equal to the set temperature value, the indoor ambient temperature is greater than or equal to the indoor ambient temperature threshold, and the outdoor heat exchanger tube temperature is greater than or equal to the outdoor heat exchanger tube temperature threshold.

[0148] If the temperature of the indoor heat exchanger tube is greater than or equal to the third inner tube temperature threshold, the indoor fan will be turned on.

[0149] If the temperature of the indoor heat exchanger tube is less than or equal to the fourth inner tube temperature threshold, the indoor fan will be stopped.

[0150] If the temperature of the indoor heat exchanger tube is greater than the fourth inner tube temperature threshold but less than the third inner tube temperature threshold, the original state of the indoor fan is maintained.

[0151] Optionally, the air conditioning defrosting control device further includes: an adjustment module; the adjustment module is configured to:

[0152] Within the third time period, the operating frequency of the compressor will be increased to the upper limit of the frequency corresponding to the outdoor environment at the current moment;

[0153] Increase the indoor ambient temperature compensation value by the set value.

[0154] Optionally, the adjustment module is also configured to:

[0155] Obtain the indoor fan speed, indoor ambient temperature, and indoor heat exchanger tube temperature at the moment of entering the defrosting and heat storage stage;

[0156] Adjust the speed of the indoor fan based on the indoor fan speed, indoor ambient temperature, indoor heat exchanger tube temperature, and target tube temperature of the indoor heat exchanger at the time of the frost heat storage stage.

[0157] Optionally, the adjustment module is also configured to:

[0158] Obtain the temperature difference between the indoor heat exchanger tube temperature and the target tube temperature at the moment of the frost storage stage;

[0159] When the temperature difference is less than or equal to the first temperature difference threshold, the speed of the internal fan remains constant.

[0160] When the temperature difference is greater than the first temperature difference threshold and less than or equal to the second temperature difference threshold, the speed of the internal fan is reduced by the first speed difference.

[0161] When the temperature difference is greater than the second temperature difference threshold and less than or equal to the third temperature difference threshold, the speed of the internal fan is reduced by the second speed difference.

[0162] When the temperature difference exceeds the third temperature difference threshold, the speed of the internal fan is reduced by the third speed difference.

[0163] Wherein, the first temperature difference threshold is less than the second temperature difference threshold, and the second temperature difference threshold is less than the third temperature difference threshold.

[0164] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0165] This disclosure also provides a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the steps of the air conditioning defrosting control method provided in this disclosure.

[0166] Figure 8 This is a block diagram illustrating an air conditioner 800 according to an exemplary embodiment, with reference to... Figure 8 The air conditioner 800 may include one or more of the following components: processing component 802, memory 804, power supply component 806, multimedia component 808, audio component 810, input / output interface 812, sensor component 814, and communication component 816.

[0167] Processing component 802 typically controls the overall operation of air conditioner 800, including operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the aforementioned air conditioner defrosting control method. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0168] Memory 804 is configured to store various types of data to support the operation of air conditioner 800. Examples of this data include instructions for any application or method operating on air conditioner 800, contact data, phonebook data, messages, pictures, videos, etc. Memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0169] The power supply component 806 provides power to the various components of the air conditioner 800. The power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the air conditioner 800.

[0170] The multimedia component 808 includes a screen that provides an output interface between the air conditioner 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When the air conditioner 800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0171] Audio component 810 is configured to output and / or input audio signals. For example, audio component 810 includes a microphone (MIC) configured to receive external audio signals when the air conditioner 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

[0172] Input / output interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0173] Sensor assembly 814 includes one or more sensors for providing status assessments of various aspects of the air conditioner 800. For example, sensor assembly 814 can detect the on / off state of the air conditioner 800, the relative positioning of components such as the display and keypad of the air conditioner 800, changes in the position of the air conditioner 800 or one of its components, the presence or absence of user contact with the air conditioner 800, the orientation or acceleration / deceleration of the air conditioner 800, and temperature changes of the air conditioner 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 814 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0174] Communication component 816 is configured to facilitate wired or wireless communication between air conditioner 800 and other devices. Air conditioner 800 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 816 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0175] In an exemplary embodiment, the air conditioner 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described air conditioner defrosting control method.

[0176] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, which can be executed by the processor 820 of the air conditioner 800 to complete the aforementioned air conditioner defrosting control method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0177] In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable device, the computer program having a code portion for performing the above-described air conditioning defrosting control method when executed by the programmable device.

[0178] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0179] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An air conditioning defrosting control method characterized by comprising: The method includes: When the defrosting conditions are met, the first defrosting mode is executed according to the set operating parameters; wherein, the first defrosting mode is to defrost using hot gas defrosting, and the operating parameters include one or more of the following during the defrosting stage: compressor operating frequency, electronic expansion valve opening, external fan speed, and internal fan speed; Determine whether the defrosting effect of the first defrosting mode meets the preset requirements; If the defrosting effect does not meet the preset requirements, the defrosting mode is switched from the first defrosting mode to the second defrosting mode; wherein, the second defrosting mode is a reverse cycle defrosting method. The step of determining whether the defrosting effect of the first defrosting mode meets the preset requirements includes: When the first defrosting mode continues for a first duration, it is determined whether the defrosting effect of the first defrosting mode meets the first preset requirements. The first preset requirements include one or more of the following temperature requirements: outdoor heat exchanger tube temperature, exhaust temperature, and indoor heat exchanger tube temperature. The step of determining whether the defrosting effect of the first defrosting mode meets the preset requirements also includes: If the first defrosting mode continues for a second duration, determine whether the defrosting effect of the second defrosting mode meets the second preset requirements; the second preset requirements include one or more of the following temperature requirements: outdoor heat exchanger tube temperature, exhaust temperature, and indoor heat exchanger tube temperature. The first preset requirement is different from the second preset requirement, and the first duration is shorter than the second duration.

2. The method of claim 1, wherein, The step of determining whether the defrosting effect of the first defrosting mode meets the first preset requirement when the first defrosting mode continues for a first duration includes: If, during the first duration of the first defrosting mode, the outdoor heat exchanger tube temperature is less than the first external tube temperature threshold, or the exhaust temperature is less than the first exhaust temperature threshold, or the indoor heat exchanger tube temperature is less than the first internal tube temperature threshold, then it is determined that the defrosting effect of the first defrosting mode does not meet the first preset requirement.

3. The method of claim 1, wherein, The step of determining whether the defrosting effect of the first defrosting mode meets the second preset requirement when the first defrosting mode continues for a second duration includes: If, during the second duration of the first defrosting mode, the outdoor heat exchanger tube temperature is less than the second outer tube temperature threshold, or the exhaust temperature is less than the second exhaust temperature threshold, or the indoor heat exchanger tube temperature is less than the second inner tube temperature threshold, then it is determined that the defrosting effect of the first defrosting mode does not meet the second preset requirement.

4. The method according to claim 1, characterized in that, The step of executing the first defrost mode according to the set operating parameters when the defrost conditions are met includes: If the defrosting conditions are met, the compressor operating frequency is adjusted to the preset defrosting frequency; Adjust the opening of the electronic expansion valve to the preset defrosting opening; Adjust the speed of the external fan to zero; The operating status of the indoor fan is determined based on the indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger tube temperature, and outdoor heat exchanger tube temperature.

5. The method according to claim 4, characterized in that, The process of determining the operating status of the indoor fan based on the indoor ambient temperature, outdoor ambient temperature, indoor heat exchanger tube temperature, and outdoor heat exchanger tube target temperature includes: When the sum of the indoor ambient temperature and the outdoor ambient temperature is greater than or equal to a set temperature value, the indoor ambient temperature is greater than or equal to an indoor ambient temperature threshold, and the outdoor heat exchanger tube temperature is greater than or equal to an outdoor heat exchanger tube temperature threshold. If the temperature of the indoor heat exchanger tube is greater than or equal to the third inner tube temperature threshold, the indoor fan is turned on. If the temperature of the indoor heat exchanger tube is less than or equal to the fourth inner tube temperature threshold, the indoor fan will be stopped. If the temperature of the indoor heat exchanger tube is greater than the fourth inner tube temperature threshold but less than the third inner tube temperature threshold, the original state of the indoor fan is maintained.

6. The method according to claim 1, characterized in that, Before executing the first defrost mode according to the set operating parameters, the method further includes: entering a defrost preparation stage; the defrost preparation stage includes: Within the third time period, the operating frequency of the compressor is increased to the upper limit of the frequency corresponding to the outdoor environment at the current moment; Increase the indoor ambient temperature compensation value by the set value.

7. The method according to claim 6, characterized in that, After the defrosting preparation stage and before entering the first defrosting mode, the method further includes: entering the defrosting heat storage stage; the defrosting heat storage stage includes: acquiring the indoor fan speed, indoor ambient temperature and indoor heat exchanger tube temperature at the moment of entering the defrosting heat storage stage; The speed of the indoor fan is adjusted based on the indoor fan speed, the indoor ambient temperature, the indoor heat exchanger tube temperature, and the target tube temperature of the indoor heat exchanger at the time of the frost storage stage.

8. The method according to claim 7, characterized in that, The step of adjusting the indoor fan speed based on the indoor fan speed, the indoor ambient temperature, the indoor heat exchanger tube temperature, and the target tube temperature of the indoor heat exchanger at the time of the frost storage stage includes: Obtain the temperature difference between the indoor heat exchanger tube temperature and the target tube temperature at the time of the frost storage stage; When the temperature difference is less than or equal to the first temperature difference threshold, the rotation speed of the internal fan remains constant. When the temperature difference is greater than the first temperature difference threshold and less than or equal to the second temperature difference threshold, the speed of the internal fan is reduced by the first speed difference. When the temperature difference is greater than the second temperature difference threshold and less than or equal to the third temperature difference threshold, the speed of the internal fan is reduced by the second speed difference. When the temperature difference is greater than the third temperature difference threshold, the speed of the internal fan is reduced by the third speed difference. Wherein, the first temperature difference threshold is less than the second temperature difference threshold, and the second temperature difference threshold is less than the third temperature difference threshold.

9. An air conditioner defrosting control device, characterized in that, The device includes: The defrosting module is configured to execute a first defrosting mode according to set operating parameters when defrosting conditions are met; wherein, the first defrosting mode is to defrost using hot gas defrosting, and the operating parameters include one or more of the following during the defrosting stage: compressor operating frequency, electronic expansion valve opening, external fan speed, and internal fan speed; The judgment module is configured to determine whether the defrosting effect of the first defrosting mode meets the preset requirements; The switching module is configured to switch the defrosting mode from the first defrosting mode to the second defrosting mode when the defrosting effect does not meet the preset requirements; wherein the second defrosting mode is to perform defrosting using a reverse cycle defrosting method; This judgment module is configured as follows: When the first defrosting mode continues for a first duration, it is determined whether the defrosting effect of the first defrosting mode meets the first preset requirements. The first preset requirements include one or more of the following temperature requirements: outdoor heat exchanger tube temperature, exhaust temperature, and indoor heat exchanger tube temperature. This judgment module is also configured as follows: If the first defrosting mode continues for a second duration, determine whether the defrosting effect of the first defrosting mode meets the second preset requirements; the second preset requirements include one or more of the following temperature requirements: outdoor heat exchanger tube temperature, exhaust temperature, and indoor heat exchanger tube temperature. The first preset requirement and the second preset requirement are different, and the first duration is shorter than the second duration.

10. An air conditioner, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is configured to execute the executable instructions to implement the steps of the method according to any one of claims 1-8.

11. A computer-readable storage medium storing computer program instructions thereon, characterized in that, When executed by a processor, the program instructions implement the steps of the method described in any one of claims 1-8.

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