Defrosting control method and system, air conditioner and storage medium

Abstract

The invention discloses a defrosting control method and system, an air conditioner and a storage medium. The method comprises the steps that the external environment temperature is obtained, and a first threshold value is determined according to the temperature interval where the external environment temperature is located; wherein the first threshold value is a threshold value corresponding to an operation parameter for judging whether the air conditioner is adjusted to enter non-stop defrosting or not; and operation parameters of the air conditioner are obtained, the operation parameters are compared with corresponding first threshold values, and if the non-stop defrosting condition is met, the air conditioner is adjusted to enter non-stop defrosting, the rotating speed of an inner draught fan and the rotating speed of an outer draught fan are reduced, and the opening degree of an electronic expansion valve is adjusted. The first threshold value is determined according to the temperature interval of the external environment, and then whether the air conditioner enters non-stop defrosting or not is adjusted; meanwhile, non-stop defrosting is conducted by reducing the rotating speed of the inner fan and the rotating speed of the outer fan, great reduction of the internal environment temperature during defrosting can be relieved, and the control precision and the comfort of the internal environment are improved. The method can be widely applied to the technical field of air conditioner control.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning control, and in particular to a defrosting control method, system, air conditioner and storage medium. Background Art

[0002] With the development of the economy and the continuous progress of the air-conditioning industry, people's demand for air-conditioning is constantly increasing, and the functions of air-conditioning are constantly being updated. In cold seasons, the heating demand and heating effect of air-conditioning need to be taken seriously. In the related technology, when heating at low temperatures, the defrosting method of the outdoor unit is basically reverse cycle defrosting, that is, the refrigerant flow direction is changed by reversing the four-way valve, so that the high-temperature and high-pressure refrigerant discharged from the compressor directly enters the outdoor heat exchanger for defrosting. However, the disadvantage of this defrosting method is that when defrosting, the temperature of the inner evaporator is low, and it needs to be shut down for a long time for defrosting, which affects the comfort of the indoor environment. Summary of the invention

[0003] The purpose of the present invention is to solve one of the technical problems existing in the prior art to at least a certain extent.

[0004] To this end, an object of the present invention is to provide a high-precision defrost control method, system, air conditioner and storage medium.

[0005] In order to achieve the above technical objectives, one aspect of an embodiment of the present invention provides a defrost control method, comprising the following steps: obtaining the external environment temperature, and determining a first threshold value according to the temperature range of the external environment temperature; wherein the first threshold value is a threshold value corresponding to the operating parameters for judging whether to adjust the air conditioner to enter non-stop defrosting; obtaining the operating parameters of the air conditioner, comparing the operating parameters with the corresponding first threshold value, and if the non-stop defrosting conditions are met, adjusting the air conditioner to enter non-stop defrosting, reducing the speed of the inner and outer fans, and adjusting the opening of the electronic expansion valve. The present application determines the first threshold value according to the temperature range of the external environment, and then adjusts whether the air conditioner enters non-stop defrosting; at the same time, performing non-stop defrosting by reducing the speed of the inner and outer fans is beneficial to alleviating the substantial decrease in the internal environment temperature during defrosting, and improving the control accuracy and the comfort of the internal environment.

[0006] In some embodiments, in the defrost control method of the embodiment of the present invention, the first threshold includes a first inner tube temperature threshold and a first outer tube temperature threshold, the operating parameter includes a first inner tube temperature and a first outer tube temperature, the obtaining the operating parameter of the air conditioner, comparing the operating parameter with the corresponding first threshold, if the non-stop defrosting condition is met, adjusting the air conditioner to enter non-stop defrosting, reducing the speed of the inner fan and the outer fan, and adjusting the opening of the electronic expansion valve, including:

[0007] If the first inner tube temperature is greater than or equal to the first inner tube temperature threshold, and the first outer tube temperature is less than or equal to the first outer tube temperature threshold, adjusting the air conditioner to enter a non-stop defrosting function judgment;

[0008] Determining a speed reduction value according to the temperature range;

[0009] If the function judgment result is execution, the gear of the inner fan is lowered according to the preset downshift gear; the speed of the outer fan is reduced according to the speed reduction value; and the opening of the electronic expansion valve is adjusted.

[0010] In some embodiments, in an embodiment of the present invention, determining the first threshold value according to the temperature interval of the external environment temperature includes:

[0011] If the external environment temperature is in the first interval, determining that the first inner tube temperature threshold is a first value, the first outer tube temperature threshold is a second value, and the speed reduction value is a third value;

[0012] If the external ambient temperature is in the second interval, the first inner tube temperature threshold is determined to be a fourth value, the first outer tube temperature threshold is determined to be a fifth value, and the speed drop value is determined to be a sixth value; wherein the left extreme value of the first interval is greater than or equal to the right extreme value of the second interval, the first value is greater than the fourth value, the second value is greater than the fifth value, and the third value is less than the sixth value.

[0013] In some embodiments, in one embodiment of the present invention, if the first inner tube temperature is greater than or equal to the first inner tube temperature threshold, and the first outer tube temperature is less than or equal to the first outer tube temperature threshold, after the step of adjusting the air conditioner to enter the non-stop defrosting function judgment, the method further includes:

[0014] If the current defrost times are less than the defrost times threshold, the function judgment result is determined to be executed, the rotation speeds of the inner and outer fans are reduced, and the operating parameters are updated; the defrost times threshold corresponds to the temperature range;

[0015] Compare the operating parameter with the corresponding second threshold value, and according to the comparison result, adjust the air conditioner to exit non-stop defrosting, enter normal heating operation, and update the current defrosting times; the second threshold value corresponds to the temperature range, and the second threshold value is the threshold value for adjusting the air conditioner to exit non-stop defrosting;

[0016] If the duration of normal heating operation is greater than the first duration, return to the if the first inner tube temperature is greater than or equal to the first inner tube temperature threshold, and the first outer tube temperature is less than or equal to the first outer tube temperature threshold, adjust the air conditioner to enter the non-stop defrosting function judgment.

[0017] In some embodiments, in one embodiment of the present invention, the second threshold value includes a second inner tube temperature threshold value and a second outer tube temperature threshold value; comparing the operating parameter with the corresponding second threshold value, and adjusting the air conditioner to exit non-stop defrosting and enter normal heating operation according to the comparison result, includes:

[0018] Real-time acquisition of the first inner tube temperature after entering into non-stop defrosting as the first temperature, and determination of the difference between the current first temperature and the first inner tube temperature before entering into non-stop defrosting as the first temperature difference;

[0019] If the first temperature difference is greater than or equal to the second inner tube temperature threshold, and the current first outer tube temperature is greater than or equal to the second outer tube temperature threshold, adjusting the air conditioner to exit non-stop defrosting;

[0020] Alternatively, if the non-stop defrosting operation time is greater than or equal to the second time, the air conditioner is adjusted to exit the non-stop defrosting operation.

[0021] In some embodiments, in one embodiment of the present invention, the step of adjusting the air conditioner to exit the non-stop defrosting mode and enter the normal heating mode includes:

[0022] The air conditioner is adjusted to exit non-stop defrosting, and the speed of the external fan, the gear position of the internal fan, and the opening of the electronic expansion valve are adjusted to the corresponding parameters before entering non-stop defrosting, and enters normal heating operation.

[0023] In some embodiments, in one embodiment of the present invention, if the non-stop defrosting condition is met, adjusting the air conditioner to enter non-stop defrosting further includes:

[0024] If the compressor operation time is less than the third time period, the current operation state of the air conditioner is maintained without entering non-stop defrosting mode.

[0025] On the other hand, an embodiment of the present invention provides a defrost control system, comprising:

[0026] The first module is used to obtain the external environment temperature and determine a first threshold value according to the temperature range of the external environment temperature; wherein the first threshold value is a threshold value corresponding to the operating parameter for determining whether to adjust the air conditioner to enter non-stop defrosting;

[0027] The second module is used to obtain the operating parameters of the air conditioner, compare the operating parameters with the corresponding first threshold value, and if the non-stop defrosting conditions are met, adjust the air conditioner to enter non-stop defrosting, reduce the speed of the inner fan and the outer fan, and adjust the opening of the electronic expansion valve.

[0028] In another aspect, an embodiment of the present invention provides an air conditioner, comprising:

[0029] at least one processor;

[0030] at least one memory for storing at least one program;

[0031] When the at least one program is executed by the at least one processor, the at least one processor implements the above-mentioned defrost control method.

[0032] On the other hand, an embodiment of the present invention provides a storage medium, in which a program executable by a processor is stored. When the program executable by the processor is executed by the processor, it is used to implement the above-mentioned defrost control method.

[0033] The embodiments of the present application include at least the following beneficial effects: The method provided by the embodiments of the present invention includes: obtaining the external environment temperature, and determining a first threshold value according to the temperature range of the external environment temperature; wherein the first threshold value is a threshold value corresponding to the operating parameters for judging whether to adjust the air conditioner to enter non-stop defrosting; obtaining the operating parameters of the air conditioner, comparing the operating parameters with the corresponding first threshold value, and if the non-stop defrosting conditions are met, adjusting the air conditioner to enter non-stop defrosting, reducing the speed of the inner and outer fans, and adjusting the opening of the electronic expansion valve. The present application determines the first threshold value according to the temperature range of the external environment, and then adjusts whether the air conditioner enters non-stop defrosting; at the same time, performing non-stop defrosting by reducing the speed of the inner and outer fans is beneficial to alleviating the substantial decrease in the internal environment temperature during defrosting, and improving the control accuracy and the comfort of the internal environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the embodiments of the present invention or the drawings of related technical solutions in the prior art are introduced below. It should be understood that the drawings introduced below are only for the convenience of clearly describing some embodiments of the technical solutions of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A schematic flow chart of an embodiment of a defrosting control method provided by the present invention;

[0036] Figure 2 A schematic diagram of the principle of an embodiment of the heating working process provided by the present invention;

[0037] Figure 3 A schematic diagram of a flow chart of an embodiment of a heating program provided by the present invention;

[0038] Figure 4 A schematic diagram of a flow chart of an embodiment of non-stop defrosting condition determination provided by the present invention;

[0039] Figure 5 A schematic flow chart of an embodiment of non-stop defrosting function judgment provided by the present invention;

[0040] Figure 6 A schematic flow chart of an embodiment of the process of exiting the defrosting process without stopping the machine provided by the present invention;

[0041] Figure 7 A schematic flow chart of another embodiment of the process of exiting the defrosting process without stopping the machine provided by the present invention;

[0042] Figure 8 A structural schematic diagram of an embodiment of a defrost control system provided by the present invention;

[0043] Fig. 9 A schematic structural diagram of an embodiment of an air conditioner provided by the present invention. DETAILED DESCRIPTION

[0044] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limitations of the present invention. For the step numbers in the following embodiments, they are only provided for the convenience of explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiment can be adaptively adjusted according to the understanding of those skilled in the art.

[0045] With the development of economy and the continuous progress of air conditioning industry, people's demand for air conditioning is also increasing, and the functions of air conditioning are also constantly being updated. At present, when heating at low temperature, the defrosting method of outdoor unit is basically reverse cycle defrosting, that is, the refrigerant flow direction is changed by reversing the four-way valve, so that the high-temperature and high-pressure refrigerant discharged from the compressor directly enters the outdoor heat exchanger for defrosting. However, the disadvantage of this defrosting method is that during defrosting, the temperature of the inner evaporator is low, and it takes a long time to stop for defrosting, which affects the comfort of the indoor environment.

[0046] In this regard, the present invention provides a control method for removing the thin frost on the condenser of the outdoor unit of the air conditioner in the heating mode by means of logic function control without increasing the cost. The application can prolong the heating time and improve the comfort of the air conditioner.

[0047] The defrost control method and system according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. First, the defrost control method according to the embodiments of the present invention will be described with reference to the accompanying drawings.

[0048] Reference Figure 1, a defrost control method is provided in an embodiment of the present invention. The defrost control method in the embodiment of the present invention can be applied to a terminal, a server, or software running in a terminal or a server. The terminal can be a tablet computer, a laptop computer, a desktop computer, etc., but is not limited thereto. The server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The defrost control method in the embodiment of the present invention mainly includes the following steps:

[0049] S100: Acquire the external environment temperature, and determine a first threshold value according to the temperature range of the external environment temperature; wherein the first threshold value is a threshold value corresponding to the operating parameter for determining whether to adjust the air conditioner to enter non-stop defrosting;

[0050] S200: Acquire operating parameters of the air conditioner, compare the operating parameters with the corresponding first threshold value, and if the non-stop defrosting condition is met, adjust the air conditioner to enter non-stop defrosting, reduce the speed of the inner fan and the outer fan, and adjust the opening of the electronic expansion valve.

[0051] In some possible implementations, the external environment temperature of the present application may be an outdoor environment temperature. The first threshold value in the present application may be a threshold value corresponding to a plurality of operating parameters required to determine whether to adjust the air conditioner to enter non-stop defrosting, and whether to adjust the air conditioner to enter non-stop defrosting is determined by comparing the operating parameters with the corresponding threshold values. After entering non-stop defrosting, the embodiment of the present application reduces the speed of the inner fan and the outer fan, adjusts the opening of the electronic expansion valve to a preset opening, and the refrigerant temperature in the outdoor unit condenser rises from a negative value to a positive value, thereby removing the thin frost on the outside.

[0052] Optionally, in one embodiment of the present invention, the first threshold value includes a first inner tube temperature threshold value and a first outer tube temperature threshold value, the operating parameter includes a first inner tube temperature and a first outer tube temperature, the operating parameter of the air conditioner is obtained, the operating parameter is compared with the corresponding first threshold value, and if the non-stop defrosting condition is met, the air conditioner is adjusted to enter non-stop defrosting, the speed of the inner fan and the outer fan is reduced, and the opening of the electronic expansion valve is adjusted, including:

[0053] If the first inner tube temperature is greater than or equal to the first inner tube temperature threshold, and the first outer tube temperature is less than or equal to the first outer tube temperature threshold, the air conditioner is adjusted to enter the non-stop defrosting function judgment;

[0054] Determine the speed reduction value according to the temperature range;

[0055] If the function judgment result is execution, lower the gear of the inner fan according to the preset downshift gear; reduce the speed of the outer fan according to the speed reduction value; and adjust the opening of the electronic expansion valve.

[0056] In some possible implementations, the embodiment of the present application determines the thresholds / parameters such as the first inner tube temperature, the first outer tube temperature, and the speed reduction value according to the temperature range of the external environment temperature. Specifically, the corresponding relationship between the temperature range and each first threshold value can be determined by a table; the corresponding relationship between the temperature range / temperature and each first threshold value can also be determined by a curve; the corresponding relationship between the temperature range / temperature and each first threshold value can also be determined by calculation in the form of a functional relationship. The present application does not limit the specific expression method. The non-stop defrosting function in the present application is determined as the number of cycles of non-stop defrosting. After entering the non-stop defrosting, the speed of the external fan is reduced and the gear of the internal fan is reduced. For the internal fan, the preset downshift gear is reduced. If the current gear of the internal fan is already the lowest gear, the lowest gear of the internal fan is maintained; or, if the gear difference between the current gear of the internal fan and the lowest gear is less than the preset downshift gear, the gear of the internal fan is adjusted to the lowest gear. In some embodiments, the opening of the electronic expansion valve can be directly adjusted to the preset opening. The present application determines whether to enter non-stop defrosting by judging the operating parameters and the first threshold value, thereby alleviating the problem of entering non-stop defrosting too early and affecting the comfort of the internal environment.

[0057] Optionally, in one embodiment of the present invention, determining the first threshold value according to the temperature range of the external environment temperature includes:

[0058] If the external environment temperature is in the first interval, determining the first inner tube temperature threshold to be a first value, the first outer tube temperature threshold to be a second value, and the speed reduction value to be a third value;

[0059] If the external ambient temperature is in the second interval, the first inner tube temperature threshold is determined to be a fourth value, the first outer tube temperature threshold is determined to be a fifth value, and the speed drop value is determined to be a sixth value; wherein the left extreme value of the first interval is greater than or equal to the right extreme value of the second interval, the first value is greater than the fourth value, the second value is greater than the fifth value, and the third value is less than the sixth value.

[0060] In some possible implementations, the correspondence between the temperature interval and the first threshold value can be determined by a table. For example, referring to an embodiment shown in Table 1, interval 1 can be the first interval in the present application, and interval 2 can be the second interval in the present application. The first interval and the second interval in the present application are intervals obtained by dividing the external environment temperature. When the external environment temperature is within the divided intervals, defrosting can be performed by the defrosting control method provided by the present application. It can be understood that the first interval and the second interval in the present application do not represent the number of intervals obtained by dividing the external environment temperature. The first interval and the second interval are exemplary examples. The present application can divide the temperature of the external environment into two intervals, three intervals or more intervals according to actual needs, and the present application does not make specific restrictions. When entering non-stop defrosting, the threshold corresponding to the inner disk temperature can be the first inner tube temperature threshold, and when entering non-stop defrosting, the threshold corresponding to the outer disk temperature can be the first outer tube temperature threshold; the non-stop defrosting number threshold can be the defrosting number threshold, and the external fan speed drop threshold can be the speed drop value; when exiting non-stop defrosting, the inner tube temperature difference threshold can be the second inner tube temperature threshold, and when exiting non-stop defrosting, the threshold corresponding to the outer disk temperature can be the second outer tube temperature threshold. Among them, the first inner tube temperature threshold is the inner disk temperature judgment threshold for entering non-stop defrosting, the first outer tube temperature threshold is the outer disk temperature judgment threshold for entering non-stop defrosting, the first inner tube temperature is the inner tube temperature updated in real time, and the first outer tube temperature is the outer tube temperature updated in real time.

[0061]

[0062] Table 1

[0063] Specifically, in the embodiment shown in Table 1, the first numerical value is 38, the second numerical value is -2, the third numerical value is 300, the fourth numerical value is 36, the fifth numerical value is -6, and the sixth numerical value is 500. The present application sets different first thresholds for different temperature intervals for judging or adjusting different operating parameters. The speed drop value is the value at which the speed of the external fan is reduced after entering non-stop defrosting. It can be understood that Table 1 is an illustrative example, and the present application does not limit the number of temperature intervals, the specific range of each temperature interval, and the specific value of each first threshold. Those skilled in the art can set the relevant values ​​according to actual needs.

[0064] Optionally, in one embodiment of the present invention, if the first inner tube temperature is greater than or equal to the first inner tube temperature threshold, and the first outer tube temperature is less than or equal to the first outer tube temperature threshold, after the step of adjusting the air conditioner to enter the non-stop defrosting function judgment, the method further includes:

[0065] If the current defrost times are less than the defrost times threshold, the function judgment result is determined to be executed, the speed of the inner and outer fans is reduced, and the operating parameters are updated; the defrost times threshold corresponds to the temperature range;

[0066] Compare the operating parameter with the corresponding second threshold value, and according to the comparison result, adjust the air conditioner to exit the non-stop defrosting, enter the normal heating operation, and update the current defrosting times; the second threshold value corresponds to the temperature range, and the second threshold value is the threshold value for adjusting the air conditioner to exit the non-stop defrosting;

[0067] If the normal heating operation time is longer than the first time, return to if the first inner tube temperature is greater than or equal to the first inner tube temperature threshold, and the first outer tube temperature is less than or equal to the first outer tube temperature threshold, adjust the air conditioner to enter the non-stop defrosting function judgment.

[0068] The defrost times threshold in the present application can also be determined according to the temperature range. In some embodiments, if the defrost times are less than the defrost times threshold, the function judgment result is determined to be executed, and the non-stop defrost process is continued. If the current defrost times are greater than the defrost times threshold, the function judgment result is not executed, and the normal defrost function judgment process is executed. The second threshold in the present application is the threshold corresponding to the operating parameter for judging whether to exit the non-stop defrost. The real-time measured and updated operating parameters are compared with the second threshold to determine whether to exit the non-stop defrost. If it is judged that the non-stop defrost can be exited, the defrost times are updated, and the current defrost times are added by 1 as the new defrost times. After the normal heating process executes the first duration, it is judged again whether to enter the non-stop defrost based on the non-stop defrost conditions. Specifically, the first duration in the present application is the interval between two non-stop defrosts, and the present application does not limit the specific value of the first duration.

[0069] It can be understood that the defrost control process of the present application can be:

[0070] If the first inner tube temperature is greater than or equal to the first inner tube temperature threshold, and the first outer tube temperature is less than or equal to the first outer tube temperature threshold, the air conditioner is adjusted to enter the non-stop defrosting function judgment;

[0071] Determine the speed reduction value according to the temperature range;

[0072] If the current defrost times are less than the defrost times threshold, determine the function judgment result to be executed; lower the gear of the inner fan according to the preset downshifting gear; reduce the speed of the outer fan according to the speed reduction value; and adjust the opening of the electronic expansion valve;

[0073] Update the operating parameters, compare the updated operating parameters with the corresponding second threshold value, and adjust the air conditioner to exit the non-stop defrosting mode and enter the normal heating mode according to the comparison result, and update the current defrosting times;

[0074] If the normal heating operation time is longer than the first time, return to if the first inner tube temperature is greater than or equal to the first inner tube temperature threshold, and the first outer tube temperature is less than or equal to the first outer tube temperature threshold, adjust the air conditioner to enter the non-stop defrosting function judgment.

[0075] Optionally, in one embodiment of the present invention, the second threshold value includes a second inner tube temperature threshold value and a second outer tube temperature threshold value; comparing the operating parameter with the corresponding second threshold value, and adjusting the air conditioner to exit non-stop defrosting and enter normal heating operation according to the comparison result, including:

[0076] Real-time acquisition of the first inner tube temperature after entering into non-stop defrosting as the first temperature, and determination of the difference between the current first temperature and the first inner tube temperature before entering into non-stop defrosting as the first temperature difference;

[0077] If the first temperature difference is greater than or equal to the second inner tube temperature threshold, and the current first outer tube temperature is greater than or equal to the second outer tube temperature threshold, the air conditioner is adjusted to exit the defrosting without stopping;

[0078] Alternatively, if the running time of the non-stop defrosting is greater than or equal to the second time period, the air conditioner is adjusted to exit the non-stop defrosting.

[0079] In some possible implementations, the second inner tube temperature threshold is the inner tube temperature difference threshold for determining whether to exit non-stop defrosting, and the second outer tube temperature threshold is the outer tube temperature threshold for determining whether to exit non-stop defrosting. The first temperature in this application is the first temperature updated in real time, and the first temperature difference is updated in real time according to the first temperature. Whether to exit non-stop defrosting is determined according to the comparison result of the first temperature difference and the first outer tube temperature updated in real time and the second threshold. The correspondence between the second threshold and the temperature range refers to the example in Table 1, wherein the threshold corresponding to the inner tube temperature difference threshold and the outer disk temperature for exiting non-stop defrosting is the second threshold in this application. It can be understood that Table 1 gives the change rules corresponding to the first threshold and the second threshold under different temperature ranges of the external environment. Based on the settings in Table 1, it can be understood that the first inner tube temperature threshold changes in direct proportion to the external environment temperature, the first outer tube temperature threshold changes in direct proportion to the external environment temperature, and the defrosting times threshold changes inversely with the external environment temperature. The speed drop value increases as the external ambient temperature decreases, the second inner tube temperature threshold decreases as the external ambient temperature decreases, and the second outer tube temperature threshold decreases as the external ambient temperature decreases. Of course, those skilled in the art can adjust the correspondence between the temperature range and the first threshold and the second threshold, and adjust the specific value of each threshold according to actual needs. The above is provided by the present application to determine whether to exit non-stop defrosting by comparing the operating parameters with the second threshold. In other embodiments, whether to exit non-stop defrosting can also be determined by the operating time of non-stop defrosting in the current cycle. The second time length is the operating time of non-stop defrosting in the current cycle; illustratively, the second time length can be 3 minutes, 4 minutes, or 5 minutes. The present application does not limit the specific value of the second time length.

[0080] Optionally, in one embodiment of the present invention, adjusting the air conditioner to exit non-stop defrosting and enter normal heating operation includes:

[0081] Adjust the air conditioner to exit non-stop defrosting, adjust the speed of the external fan, the gear of the internal fan, and the opening of the electronic expansion valve to the corresponding parameters before entering non-stop defrosting, and enter normal heating operation.

[0082] In some possible implementations, when exiting non-stop defrosting, it is necessary to adjust the speed of the external fan, the gear of the internal fan, and the opening of the electronic expansion valve to restore to the state before entering non-stop defrosting to perform a normal heating process.

[0083] Optionally, in one embodiment of the present invention, if the non-stop defrosting condition is met, adjusting the air conditioner to enter non-stop defrosting further includes:

[0084] If the compressor running time is less than the third time period, the current running state of the air conditioner is maintained without entering non-stop defrosting mode.

[0085] In some possible implementations, in addition to the comparison and judgment between the above-mentioned operating parameters and the first threshold value, the present application also proposes that the compressor needs to run for a certain period of time before entering the non-stop defrosting function. It is understandable that when the air conditioner indoor unit receives the heating signal and normally starts the heating mode, during the first operation, the compressor must run for a third period of time before entering the non-stop defrosting function condition judgment, in order to ensure that the air conditioner heats the inside and ensures the comfort of the user. The third period of time in the present application is the duration of the first heating operation.

[0086] Optionally, the control method provided by the present application further includes:

[0087] If the external environment temperature is in the non-stop defrosting range, determine the first threshold value according to the temperature range of the external environment temperature;

[0088] Or, if the external environment temperature is not in the non-stop defrosting range, enter the normal defrosting procedure.

[0089] It can be understood that the non-stop defrosting intervals in the present application can be intervals 1, 2, and 3 shown in Table 1. When the external ambient temperature is not too low and a thin layer of frost appears on the outdoor unit condenser, defrosting is performed using the control method provided in the present application to alleviate the significant drop in internal ambient temperature during normal defrosting and improve the comfort of the internal environment.

[0090] The defrost control method provided by the present application is described in detail below with specific embodiments:

[0091] Based on the problems in the related technology, how to delay the indoor heating time and improve the comfort of air conditioning without increasing the cost has become a problem that needs to be solved. The present application provides a method of removing the frost on the outer condenser while maintaining the heat output on the inner side by adjusting the expansion valve opening, the gear position of the inner unit, and the speed of the outer unit when the frost on the outer condenser of the air conditioner is thin. This prolongs the heating time and improves the comfort of the indoor environment.

[0092] Specifically, refer to Figure 2As shown, when the air conditioner is heating, the refrigerant circulates in the system to transfer heat. First, the compressor works to compress the gaseous refrigerant into a high-temperature and high-pressure gas, and then these gases enter the heat exchanger (condenser) of the indoor unit. In the indoor unit, the gaseous refrigerant releases heat to the room through heat exchange, so that the indoor temperature rises. At this time, the gaseous refrigerant condenses into a liquid due to heat loss. Then, the liquid refrigerant passes through a throttling device (such as an expansion valve), and the pressure and temperature of the refrigerant are reduced, becoming a low-temperature and low-pressure liquid. Finally, the low-temperature and low-pressure refrigerant enters the heat exchanger (evaporator) of the outdoor unit, absorbs the heat in the outdoor air and vaporizes. The vaporized refrigerant is then sucked into the compressor to start a new cycle. When the indoor unit of the air conditioner receives the heating signal, it normally turns on the heating mode to run. For the first operation, the compressor must run for 30 minutes (i.e., the third time length in this application) to enter the non-stop defrosting function condition judgment. This is to ensure that the air conditioner heats the inside and ensures the comfort of the user.

[0093] Reference Figure 3 As shown, after starting up, the air conditioner first detects which range the air conditioner outer ring temperature X is in (for example, the outer ring range / temperature range are: range 1: 0<X≤3; range 2: -5<X≤0; range 3: -7<X≤-5; when the outer ring detection is not in these ranges, the normal defrosting mode is executed), so as to determine to enter the non-stop defrosting mode. Figure 4 As shown, determine that the compressor meets the running time; then, detect the inner tube temperature Tin (that is, the first inner tube temperature threshold in the present application), and judge whether the inner tube temperature Tin ≥ Zin (the purpose of detecting the inner ring is to ensure that the indoor air outlet temperature is maintained at a certain temperature, so as to avoid the inner tube temperature being low when entering the non-stop defrosting function in the later stage, thereby affecting the user's comfort. For example, Zin1 = 38°C; Zin2 = 36°C; Zin3 = 34°C). After the conditions are met, detect whether the outer disk temperature Tout / the first outer tube temperature threshold is ≤ Yin (Yin1 = -2°C; Yin2 = -6°C; Yin3 = -9°C). After the above three conditions are met, enter the non-stop defrosting function.

[0094] Reference Figure 5The non-stop defrosting process shown, after entering the non-stop defrosting function, first determines the number of non-stop defrosting times A / defrosting times threshold (A1=5; A2=3; A3=2) according to the detected outer ring temperature X, and then the outdoor unit sends a non-stop defrosting signal to the indoor unit, and synchronously determines the speed of the indoor fan windshield and the outdoor fan. Specifically: reduce the speed of the indoor fan, reduce the speed of the outdoor fan; when the indoor fan windshield> low windshield, the windshield will be reduced by 2 gears (that is, the preset downshift gear in this application), but the lowest windshield is the low windshield; if the windshield is < low windshield, maintain the current windshield. For example: when the indoor fan windshield is high wind, it will be reduced by 2 gears to the low windshield; when the windshield is medium windshield, it will be reduced to the low windshield (the indoor fan windshield has super windshield-high windshield-medium windshield-low windshield-silent windshield). The speed R of the external fan is reduced according to the outer ring interval X in which it is located. The speed reduction in different outer ring intervals X is inconsistent, that is, the speed reduction value is determined according to the temperature interval. For example, based on the temperature interval setting in the above example, the corresponding speed reduction value is determined, R reduction 1 = 300r / min; R reduction 2 = 500r / min; R reduction 3 = 700r / min. After the internal and external fans are adjusted, the opening of the electronic expansion valve is adjusted to the opening of non-stop defrosting (for example, the preset opening / opening value can be 420 steps), and the external machine begins to enter the non-stop defrosting operation.

[0095] Among them, lowering the wind speed of the indoor fan is to reduce the heat exchange of the refrigerant in the indoor unit, so that the temperature of the refrigerant flowing to the outdoors for heat exchange is higher, and then the temperature of the refrigerant flowing into the outdoor unit coil is higher, melting the frost on the outdoor unit coil; similarly, lowering the wind speed of the outdoor unit is to reduce the heat exchange of the outdoor heat exchanger, so that most of the heat of the refrigerant flowing into the outdoor unit coil is used for defrosting, reducing the heat exchange with the air.

[0096] After the outdoor unit enters the non-stop defrosting mode, the refrigerant temperature in the outdoor unit condenser rises from a negative value to a positive value, and the thin frost on the outside is removed. During the defrosting period, the inner tube temperature, outer tube temperature, and defrosting time are detected synchronously. There are two conditions for exiting defrosting, and defrosting can be exited when any one of them is met: First, when the temperature difference between the inner tube temperature Tin and the inner tube temperature Tin' during defrosting ΔTin ≥ Zret (ΔTin = Tin'-Tin), Zret 1 = 5°C; Zret 2 = 4°C; Zret 3 = 3°C), and the outer tube temperature Tout' ≥ Yret (Yret 1 = 9°C; Yret 2 = 8°C; Yret 3 = 7°C), defrosting can be exited; second, when the defrosting time meets the time threshold tmax = 3min, defrosting can be exited.

[0097] Reference Figure 6The process of exiting the non-stop defrosting is shown. After the conditions for exiting the non-stop defrosting function are met, the defrosting times a are recorded, the electronic expansion valve starts to work, adjusts back to the initial opening, the external fan speed is increased to the original speed; the internal fan gear is increased to the original wind gear, and then re-enters normal heating operation. After the running time is 20 minutes (that is, the first time length in this application), the non-stop defrosting logic judgment (that is, the non-stop defrosting condition judgment in this application, whether the non-stop defrosting conditions are met) is entered, ensuring that the logic will not be entered repeatedly during the period, and also ensuring the comfort of users.

[0098] Reference Figure 7 The non-stop defrosting cycle shown in the figure, after repeatedly entering the non-stop defrosting function, the defrosting times a after the non-stop defrosting is completed are recorded normally according to the number of times entered. When a<A, the non-stop defrosting function is normally executed; when a=A, the non-stop defrosting logic is no longer executed, and the judgment of the normal reverse cycle defrosting logic is entered. Table 2 records the meaning of each symbol in the above example.

[0099]

[0100] Table 2

[0101] The present application solves the problem that when the heating operation time of the existing air conditioner is too long, the outdoor unit frosts, resulting in poor heat exchange performance of the outdoor condenser, and during the traditional reverse cycle defrosting process, the temperature of the inner evaporator is low, thereby affecting the user's comfort experience.

[0102] The method provided by the embodiment of the present application includes: obtaining the external environment temperature, and determining a first threshold value according to the temperature range of the external environment temperature; wherein the first threshold value is a threshold value corresponding to the operating parameters for judging whether to adjust the air conditioner to enter non-stop defrosting; obtaining the operating parameters of the air conditioner, comparing the operating parameters with the corresponding first threshold value, and if the non-stop defrosting condition is met, adjusting the air conditioner to enter non-stop defrosting, and reducing the speed of the internal and external fans. The present application determines the first threshold value according to the temperature range of the external environment, and then adjusts whether the air conditioner enters non-stop defrosting; at the same time, by reducing the speed of the internal and external fans for non-stop defrosting, it is helpful to alleviate the substantial decrease in the internal environment temperature during defrosting, and improve the control accuracy and the comfort of the internal environment.

[0103] Secondly, refer to the attached Figure 8 A defrost control system according to an embodiment of the present invention is described.

[0104] Figure 8 1 is a schematic diagram of the structure of a defrost control system according to an embodiment of the present invention. The system specifically comprises:

[0105] The first module 810 is used to obtain the external environment temperature and determine the first threshold value according to the temperature range of the external environment temperature; wherein the first threshold value is a threshold value corresponding to the operating parameter for determining whether to adjust the air conditioner to enter non-stop defrosting;

[0106] The second module 820 is used to obtain the operating parameters of the air conditioner, compare the operating parameters with the corresponding first threshold value, and if the non-stop defrosting conditions are met, adjust the air conditioner to enter non-stop defrosting, reduce the speed of the inner fan and the outer fan, and adjust the opening of the electronic expansion valve.

[0107] It can be seen that the contents of the above method embodiments are all applicable to the present system embodiments, the functions specifically implemented by the present system embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0108] Reference Fig. 9 , an embodiment of the present invention provides an air conditioner, comprising:

[0109] at least one processor 410;

[0110] At least one memory 420, used to store at least one program;

[0111] When the at least one program is executed by the at least one processor 410, the at least one processor 410 implements the defrost control method.

[0112] On the other hand, the present application provides an air conditioner, comprising the above-mentioned defrost control system.

[0113] Similarly, the contents of the above method embodiments are all applicable to the present air conditioner embodiment. The functions specifically implemented by the present air conditioner embodiment are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0114] An embodiment of the present invention further provides a computer-readable storage medium, in which a program executable by a processor is stored. The program executable by the processor is used to execute the above-mentioned defrost control method when executed by the processor.

[0115] Similarly, the contents of the above method embodiments are all applicable to the present storage medium embodiments. The functions specifically implemented by the present storage medium embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0116] In some selectable embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the present invention is provided by way of example, for the purpose of providing a more comprehensive understanding of technology. The disclosed method is not limited to the operation and logic flow presented herein. Selectable embodiments are expected, wherein the order of various operations is changed and the sub-operation of a part for which is described as a larger operation is performed independently.

[0117] In addition, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise specified, one or more of the functions and / or features can be integrated into a single physical device and / or software module, or one or more functions and / or features can be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding the present invention. More specifically, in view of the properties, functions and internal relationships of the various functional modules in the device disclosed herein, the actual implementation of the module will be understood within the conventional skills of the engineer. Therefore, those skilled in the art can implement the present invention set forth in the claims without excessive experimentation using ordinary techniques. It is also understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present invention, which is determined by the full scope of the appended claims and their equivalents.

[0118] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several programs to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0119] The logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable programs for implementing the logical functions, and may be embodied in any computer-readable medium for use by a program execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch and execute a program from a program execution system, device or apparatus), or in conjunction with such program execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by a program execution system, device or apparatus, or in conjunction with such program execution systems, devices or apparatuses.

[0120] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0121] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable program execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0122] In the above description of this specification, the description with reference to the terms "one embodiment / example", "another embodiment / example" or "certain embodiments / examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0123] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0124] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A defrosting control method, characterized in that: The following steps are involved: Acquire the external environment temperature, and determine a first threshold value according to the temperature range of the external environment temperature; wherein the first threshold value is a threshold value corresponding to the operating parameter for determining whether to adjust the air conditioner to enter non-stop defrosting; The operating parameters of the air conditioner are obtained, and the operating parameters are compared with the corresponding first threshold value. If the non-stop defrosting condition is met, the air conditioner is adjusted to enter non-stop defrosting, the speeds of the inner and outer fans are reduced, and the opening of the electronic expansion valve is adjusted.

2. The defrosting control method according to claim 1, characterized in that: The first threshold includes a first inner tube temperature threshold and a first outer tube temperature threshold, the operating parameter includes a first inner tube temperature and a first outer tube temperature, and the obtaining of the operating parameter of the air conditioner, comparing the operating parameter with the corresponding first threshold, and if the non-stop defrosting condition is met, adjusting the air conditioner to enter non-stop defrosting, reducing the speeds of the inner fan and the outer fan, and adjusting the opening of the electronic expansion valve, includes: If the first inner tube temperature is greater than or equal to the first inner tube temperature threshold, and the first outer tube temperature is less than or equal to the first outer tube temperature threshold, adjusting the air conditioner to enter a non-stop defrosting function judgment; Determining a speed reduction value according to the temperature range; If the function judgment result is execution, the gear of the inner fan is lowered according to the preset downshift gear; the speed of the outer fan is reduced according to the speed reduction value; and the opening of the electronic expansion valve is adjusted.

3. The defrosting control method according to claim 2, characterized in that: The determining the first threshold value according to the temperature range of the external environment temperature includes: If the external environment temperature is in the first interval, determining that the first inner tube temperature threshold is a first value, the first outer tube temperature threshold is a second value, and the speed reduction value is a third value; If the external ambient temperature is in the second interval, the first inner tube temperature threshold is determined to be a fourth value, the first outer tube temperature threshold is determined to be a fifth value, and the speed drop value is determined to be a sixth value; wherein the left extreme value of the first interval is greater than or equal to the right extreme value of the second interval, the first value is greater than the fourth value, the second value is greater than the fifth value, and the third value is less than the sixth value.

4. The defrosting control method according to claim 2, characterized in that: After the step of adjusting the air conditioner to enter a non-stop defrosting function if the first inner tube temperature is greater than or equal to the first inner tube temperature threshold and the first outer tube temperature is less than or equal to the first outer tube temperature threshold, the method further includes: If the current defrost times are less than the defrost times threshold, the function judgment result is determined to be executed, the rotation speeds of the inner and outer fans are reduced, and the operating parameters are updated; the defrost times threshold corresponds to the temperature range; Compare the operating parameter with the corresponding second threshold value, and according to the comparison result, adjust the air conditioner to exit non-stop defrosting and enter normal heating operation, and update the current defrosting times; the second threshold value corresponds to the temperature range, and the second threshold value is the threshold value for adjusting the air conditioner to exit non-stop defrosting; If the duration of normal heating operation is greater than the first duration, return to the if the first inner tube temperature is greater than or equal to the first inner tube temperature threshold, and the first outer tube temperature is less than or equal to the first outer tube temperature threshold, adjust the air conditioner to enter the non-stop defrosting function judgment.

5. The defrosting control method according to claim 4, characterized in that: The second threshold value includes a second inner tube temperature threshold value and a second outer tube temperature threshold value; comparing the operating parameter with the corresponding second threshold value, and adjusting the air conditioner to exit non-stop defrosting and enter normal heating operation according to the comparison result, including: Real-time acquisition of the first inner tube temperature after entering into non-stop defrosting as the first temperature, and determination of the difference between the current first temperature and the first inner tube temperature before entering into non-stop defrosting as the first temperature difference; If the first temperature difference is greater than or equal to the second inner tube temperature threshold, and the current first outer tube temperature is greater than or equal to the second outer tube temperature threshold, adjusting the air conditioner to exit non-stop defrosting; Alternatively, if the non-stop defrosting operation time is greater than or equal to the second time, the air conditioner is adjusted to exit the non-stop defrosting operation.

6. The defrosting control method according to claim 4, characterized in that: The step of adjusting the air conditioner to exit the non-stop defrosting mode and enter the normal heating mode includes: The air conditioner is adjusted to exit non-stop defrosting, and the speed of the external fan, the gear position of the internal fan, and the opening of the electronic expansion valve are adjusted to the corresponding parameters before entering non-stop defrosting, and enters normal heating operation.

7. The defrosting control method according to claim 1, characterized in that: If the non-stop defrosting condition is met, adjusting the air conditioner to enter non-stop defrosting also includes: If the compressor operation time is less than the third time period, the current operation state of the air conditioner is maintained without entering non-stop defrosting mode.

8. A defrost control system, characterized in that: include: The first module is used to obtain the external environment temperature and determine a first threshold value according to the temperature range of the external environment temperature; wherein the first threshold value is a threshold value corresponding to the operating parameter for determining whether to adjust the air conditioner to enter non-stop defrosting; The second module is used to obtain the operating parameters of the air conditioner, compare the operating parameters with the corresponding first threshold value, and if the non-stop defrosting conditions are met, adjust the air conditioner to enter non-stop defrosting, reduce the speed of the inner fan and the outer fan, and adjust the opening of the electronic expansion valve.

9. An air conditioner, characterized in that: include: at least one processor; at least one memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the defrost control method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a program executable by a processor, characterized in that: The program executable by the processor is used to implement the defrost control method according to any one of claims 1 to 7 when executed by the processor.

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