Method and device for controlling self-cleaning of indoor unit, indoor unit and air conditioner

Abstract

The invention relates to the technical field of intelligent household appliances, and discloses a method for controlling self-cleaning of an indoor unit, the indoor unit comprises an indoor heat exchanger, the indoor heat exchanger is provided with a plurality of refrigerant branches which are independently controlled to be switched on and off, and the refrigerant branches correspond to different parts of the indoor heat exchanger respectively; the method comprises the steps that under the condition that the air conditioner operates in a refrigeration mode, a first temperature difference value between the environment temperature and the temperature set by a user is calculated; according to the environment humidity and the first temperature difference value, the actual set temperature and the target wind speed are determined; and selectively executing integral frosting or segmented frosting according to the actual set temperature and the target wind speed. The air conditioner operates at the actual set temperature, so that convenient conditions can be provided for frosting. And the frosting efficiency can be improved when integral frosting is executed. And when segmented frosting is executed, local alternate frosting is conducted on the indoor heat exchanger, the influence of frosting on air outlet can be reduced, and the air outlet effect is further guaranteed. The invention further discloses a device for controlling self-cleaning of the indoor unit, the indoor unit and the air conditioner.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, for example, to a method and device for controlling self-cleaning of an indoor unit, an indoor unit, and an air conditioner. Background Art

[0002] After the air conditioner is used for a long time, some dust will accumulate in the indoor heat exchanger, which will affect the heat exchange of the indoor heat exchanger. Therefore, the air conditioner usually has a self-cleaning function.

[0003] The self-cleaning function of the air conditioner uses the principle of strong cooling to quickly frost and defrost the indoor unit heat exchanger, discharge condensed water, and discharge impurities and dirt attached to the fins through condensed water. However, the self-cleaning cycle is very long, usually taking at least 10 minutes and at most 30 minutes. During the self-cleaning period of the air conditioner, the air output of the indoor unit will be affected to a certain extent, affecting the user experience.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiments of the present disclosure provide a method and device for controlling the self-cleaning of an indoor unit, an indoor unit, and an air conditioner, so as to ensure the air outlet effect when the indoor unit performs self-cleaning.

[0007] In some embodiments, the method for controlling self-cleaning of the indoor unit includes: the indoor unit includes: an indoor heat exchanger, the indoor heat exchanger is provided with multiple independently controlled on-off refrigerant branches, and the multiple refrigerant branches correspond to different parts of the indoor heat exchanger respectively; the method includes: when the air conditioner operates in cooling mode, calculating the first temperature difference between the ambient temperature and the user-set temperature; determining the actual set temperature and target wind speed based on the ambient humidity and the first temperature difference; and selectively performing overall frosting or segmented frosting according to the actual set temperature and target wind speed.

[0008] In some embodiments, the device for controlling the self-cleaning of the indoor unit includes: a processor and a memory storing program instructions, and the processor is configured to execute the aforementioned method for controlling the self-cleaning of the indoor unit when running the program instructions.

[0009] In some embodiments, the indoor unit includes: an indoor unit body; and a device for controlling self-cleaning of the indoor unit as described above, which is installed on the indoor unit body.

[0010] In some embodiments, the air conditioner includes: an indoor unit as described above.

[0011] The method and device for controlling the self-cleaning of an indoor unit, the indoor unit, and the air conditioner provided in the embodiments of the present disclosure can achieve the following technical effects:

[0012] When the air conditioner is running in cooling mode, the first temperature difference between the ambient temperature and the user-set temperature is calculated, and then the actual set temperature and target wind speed are determined according to the ambient humidity and the first temperature difference, so that the indoor fan runs at the target speed, which is conducive to frosting of the indoor heat exchanger. At the same time, the air conditioner runs at the actual set temperature, providing convenient conditions for frosting. When the overall frosting is selectively performed, the frosting efficiency can be improved. Compared with the overall frosting, when the segmented frosting is selectively performed, the indoor heat exchanger is partially frosted in turn, which can reduce the impact of frosting on the air outlet, so as to further ensure the air outlet effect.

[0013] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0015] Figure 1 is a schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0016] Figure 2 is a schematic diagram of a method for controlling self-cleaning of an indoor unit provided by an embodiment of the present disclosure;

[0017] Figure 3 is a schematic diagram of determining the actual set temperature according to the ambient humidity and the first temperature difference provided by an embodiment of the present disclosure;

[0018] Figure 4 is a schematic diagram of another method for controlling self-cleaning of an indoor unit provided by an embodiment of the present disclosure;

[0019] Figure 5 is a schematic diagram of a device for controlling self-cleaning of an indoor unit provided by an embodiment of the present disclosure;

[0020] Figure 6 is a schematic diagram of another device for controlling self-cleaning of an indoor unit provided by an embodiment of the present disclosure;

[0021] Figure 7 It is a schematic diagram of an indoor unit provided in an embodiment of the present disclosure.

[0022] Reference numerals:

[0023] 1. Air conditioner; 10. Indoor unit; 20. Outdoor unit; 30. Refrigerant branch; 31. On / off valve;

[0024] 50. A device for controlling the self-cleaning of the indoor unit; 51. A calculation module; 52. A determination module; 53. An execution module;

[0025] 60. Device for controlling self-cleaning of the indoor unit; 61. Processor; 62. Memory; 63. Communication interface; 64. Bus. DETAILED DESCRIPTION

[0026] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0027] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0028] Unless otherwise stated, the term "plurality" means two or more.

[0029] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0030] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0031] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0032] Combination Figure 1As shown, the embodiment of the present disclosure provides an air conditioner 1, including: an indoor unit 10 and an outdoor unit 20. The indoor unit 10 includes: an indoor heat exchanger. The outdoor unit 20 includes: a compressor and an outdoor heat exchanger. The outdoor heat exchanger is connected to the indoor heat exchanger through a plurality of refrigerant branches 30. The plurality of refrigerant branches 30 correspond to different parts of the indoor heat exchanger respectively. Optionally, there are six refrigerant branches 30. Accordingly, the indoor heat exchanger is divided into six parts, and the six refrigerant branches 30 correspond to the six parts of the indoor heat exchanger one by one. An on-off valve 31 is provided on each refrigerant branch 30. The on-off valve 31 is connected to the processor in communication so as to be controlled to be opened or closed, thereby controlling the refrigerant branch 30 corresponding to the on-off valve 31 to be turned on or off. In this way, the refrigerant flowing out of the outdoor heat exchanger is diverted through the plurality of refrigerant branches 30, and then flows into the part of the indoor heat exchanger corresponding to the refrigerant branch 30. When all the on-off valves 31 are controlled to be opened, the refrigerant flows into all parts of the indoor heat exchanger through the refrigerant branches 30, and the overall frosting of the indoor heat exchanger is achieved. When a part of the on-off valves 31 are controlled to be opened, the refrigerant flows into the corresponding part of the indoor heat exchanger through the refrigerant branches 30 corresponding to the opened on-off valves 31, and then the part is frosted separately. In this way, by controlling the number of on-off valves 31 opened, partial frosting of 1 / 2, 1 / 3, 1 / 4, etc. of the indoor heat exchanger can be achieved, that is, segmented frosting of the indoor heat exchanger can be achieved.

[0033] The on-off valve 31 is preferably an electronic expansion valve. The electronic expansion valve can accurately control the refrigerant flow rate of each refrigerant branch 30. The on-off valves 31 can be controlled to open and close in sequence until the indoor heat exchanger is completely frosted and defrosted, and then the on-off valves 31 are controlled to be fully opened.

[0034] Combination Figure 2 , the embodiment of the present disclosure provides a method for controlling self-cleaning of an indoor unit, comprising:

[0035] S101, when the air conditioner operates in cooling mode, the processor calculates a first temperature difference between the ambient temperature and the temperature set by the user.

[0036] S102: The processor determines an actual set temperature and a target wind speed according to the ambient humidity and the first temperature difference.

[0037] S103, the processor controls the indoor unit to selectively perform overall frosting or segmented frosting according to the actual set temperature and target wind speed.

[0038] When the air conditioner is running in cooling mode, the indoor heat exchanger is an evaporator. At this time, the air conditioner is running self-cleaning, and the indoor heat exchanger can also be cooled, and does not occupy the self-cleaning time separately. Moreover, compared with the self-cleaning when the air conditioner is running in heating mode, controlling the indoor unit to perform self-cleaning at this time can reduce the impact on the normal operation mode. Therefore, the method for controlling the self-cleaning of the indoor unit provided in this embodiment is performed in cooling mode.

[0039] The temperature sensor and humidity sensor in the same environment as the air conditioner are connected to the processor in communication so that the processor can obtain the ambient temperature and humidity of the environment in which the air conditioner is located. At the same time, the processor can receive the user-set temperature sent by the user through the remote control. When the air conditioner is running in cooling mode, the processor calculates the difference between the ambient temperature and the user-set temperature, and defines the difference as the first temperature difference ΔT1. The first temperature difference can characterize the gap between the ambient temperature and the user's expected temperature. The relationship between ambient humidity and frosting speed is large. The higher the humidity, the more efficient the frosting. The wind speed is also related to the frosting speed. Usually, low wind speed is more likely to condense, which can promote low temperature of the pipeline and is more conducive to frosting. Therefore, the processor determines the actual set temperature and the target wind speed of the internal fan according to the ambient humidity and the first temperature difference. The user-set temperature may be unfavorable for frosting of the indoor heat exchanger, so it is necessary to determine the actual set temperature to provide convenient conditions for frosting. The processor controls the operation of the air conditioner according to the actual set temperature and the target wind speed, and selectively performs overall frosting or segmented frosting.

[0040] By using the method for controlling the self-cleaning of the indoor unit provided by the embodiment of the present disclosure, when the air conditioner operates in the cooling mode, the first temperature difference between the ambient temperature and the user-set temperature is calculated, and then the actual set temperature and the target wind speed are determined according to the ambient humidity and the first temperature difference, so that the indoor fan runs at the target speed, which is conducive to the frosting of the indoor heat exchanger. At the same time, the air conditioner runs at the actual set temperature, providing convenient conditions for frosting. When the overall frosting is selectively performed, the frosting efficiency can be improved. Compared with the overall frosting, when the segmented frosting is selectively performed, the indoor heat exchanger is partially frosted in turn, which can reduce the impact of frosting on the air outlet, so as to further ensure the air outlet effect.

[0041] Combination Figure 3 As shown, S102, the processor determines the actual set temperature according to the ambient humidity and the first temperature difference, including:

[0042] S112: The processor predicts the frosting duration of the indoor heat exchanger according to the ambient humidity and the first temperature difference.

[0043] S122: The processor determines a temperature compensation value according to the frosting duration.

[0044] S132: The processor determines the actual set temperature based on the temperature compensation value.

[0045] As analyzed above, the greater the ambient humidity, the faster the frost forms. At the same time, it is also necessary to consider the actual demand for frost based on the first temperature difference. Therefore, the frost duration of the indoor heat exchanger is predicted based on the ambient humidity and the first temperature difference. The temperature compensation value is determined based on the frost duration, and then the temperature compensation value is used to compensate the user set temperature to obtain the actual set temperature. In this way, the air conditioner runs at the actual set temperature, which is more conducive to the frost formation of the indoor heat exchanger. At the same time, the actual set temperature is obtained by compensating on the basis of the user set temperature, so the air conditioner runs at the actual set temperature to ensure the air outlet effect, thereby taking into account the user's actual demand for the air outlet temperature.

[0046] Optionally, a machine learning algorithm is used to analyze and learn the operating data of the air conditioner, and then a frosting model of the indoor heat exchanger is established in advance.

[0047] Optionally, the processor inputs the current ambient humidity and the first temperature difference into a frosting model to obtain a corresponding frosting duration.

[0048] Optionally, the processor inputs the predicted frosting duration into a frosting model to obtain a corresponding temperature compensation value a.

[0049] Optionally, the processor inputs the current ambient humidity and the first temperature difference into the frost model to obtain the corresponding target wind speed F.

[0050] By continuously collecting and analyzing data, machine learning algorithms can gradually optimize frosting control strategies and improve control accuracy and efficiency.

[0051] Optionally, at S132, the processor determines the actual set temperature according to the temperature compensation value, including:

[0052] The processor calculates a second temperature difference between the user set temperature and the temperature compensation value.

[0053] The processor determines the second temperature difference as the actual set temperature.

[0054] ΔT2=T s -a, where ΔT2 is the second temperature difference, T s Set the temperature for the user. Determine ΔT2 as the actual set temperature T s The lower the temperature of the indoor heat exchanger, the easier it is to frost. Therefore, based on the user's set temperature, the temperature compensation value is subtracted, and the obtained second temperature difference is determined as the actual set temperature, which is conducive to frost formation on the indoor heat exchanger.

[0055] Optionally, the processor calculates a second temperature difference between the user set temperature and the temperature compensation value, including:

[0056] The processor determines a compensation coefficient according to the ambient humidity and the first temperature difference.

[0057] The processor calculates the product of the compensation coefficient and the temperature compensation value.

[0058] The processor uses the difference between the user set temperature and the product as the second temperature difference.

[0059] In order to more accurately control the frosting of the indoor heat exchanger, the temperature compensation value can be adjusted. Specifically, the compensation coefficient is determined according to the ambient humidity and the first temperature difference, and the product of the compensation coefficient and the temperature compensation value is calculated, and the obtained product value is used as the adjusted compensation coefficient. Then, the difference between the user-set temperature and the product is calculated, and the difference is used as the second temperature difference.

[0060] In this way, the influence of ambient humidity on the frosting speed is taken into account, and the gap between the user demand represented by the first temperature difference and the actual situation is taken into account. The compensation coefficient is determined based on the ambient humidity and the first temperature difference, and the temperature compensation value is adjusted to obtain a more accurate actual set temperature. In this way, it is beneficial to the frosting of the indoor heat exchanger and the air outlet effect can be taken into account.

[0061] Optionally, the processor determines a compensation coefficient according to the ambient humidity and the first temperature difference, including:

[0062] The processor determines that the compensation coefficient is a first coefficient when the ambient humidity is within a first preset humidity range or a second preset humidity range.

[0063] The processor determines a compensation coefficient according to the first temperature difference when the ambient humidity is within a third preset humidity range.

[0064] The end value of the first preset humidity range is greater than the end value of the second preset humidity range, and the end value of the second preset humidity range is greater than the end value of the third preset humidity range.

[0065] A first preset humidity range, a second preset humidity range, and a third preset humidity range are set and pre-stored in the memory. The end value of the first preset humidity range is greater than the end value of the second preset humidity range, and the end value of the second preset humidity is greater than the end value of the third preset humidity range. If the ambient humidity is within the first preset humidity range or the second preset humidity range, it means that the ambient humidity is relatively high at this time, which is conducive to frosting of the indoor heat exchanger, and the compensation coefficient is determined to be a smaller first coefficient. If the ambient humidity is within the third preset humidity range, it means that the ambient humidity is relatively low at this time, and the compensation coefficient needs to be increased to facilitate indoor heat exchange and frosting. However, increasing the compensation coefficient will affect the air outlet effect, so the compensation coefficient is further determined according to the first temperature difference to reduce the adverse effect on the air outlet effect.

[0066] In this way, when the ambient humidity is high, the compensation coefficient is determined to be a smaller first coefficient. When the ambient humidity is low, the compensation coefficient is further determined according to the first temperature difference. In this way, the compensation coefficient is determined based on the actual situation, and the compensation coefficient can be determined more accurately on the basis of conforming to the environment and taking into account the air outlet effect, and then the temperature compensation value is appropriately adjusted to obtain a more accurate actual set temperature.

[0067] Optionally, the first preset humidity range is [70%, 100%), the second preset humidity range is [50%, 70%), and the third preset humidity range is (0, 50%).

[0068] Optionally, the first coefficient is 1.

[0069] Optionally, the processor determines the compensation coefficient according to the first temperature difference, including:

[0070] The processor determines that the compensation coefficient is the second coefficient when the first temperature difference is within the first preset temperature difference range and the frosting mode is overall frosting.

[0071] The processor determines that the compensation coefficient is the third coefficient when the first temperature difference is within the first preset temperature difference range and the frosting method is segmented frosting.

[0072] The processor determines that the compensation coefficient is a fourth coefficient when the first temperature difference is within a second preset temperature difference range.

[0073] The processor determines that the compensation coefficient is a fifth coefficient when the first temperature difference is within a third preset temperature difference range.

[0074] The end value of the first preset temperature difference range is greater than the end value of the second preset temperature difference range, the end value of the second preset temperature difference range is greater than the end value of the third preset temperature difference range. The second coefficient is greater than the third coefficient, the third coefficient is less than the fourth coefficient, and the fourth coefficient is less than the fifth coefficient.

[0075] A first preset temperature difference range, a second preset temperature difference range and a third preset temperature difference range are set and stored in the memory in advance. The end value of the first preset temperature difference range is greater than the end value of the second preset temperature difference range, and the end value of the second preset temperature difference is greater than the end value of the third preset temperature difference range.

[0076] If the first temperature difference is within the first preset temperature difference range, it means that the first temperature difference is large. If frosting is performed in this case, the impact on the air outlet effect will make the user feel more obvious. Therefore, the frosting method of the indoor heat exchanger is further determined, and whether to make a substantial adjustment to the temperature compensation value is determined according to the frosting method. Specifically, if the frosting method is overall frosting, the required temperature is relatively low. If the frosting method is segmented frosting, that is, only a part of the indoor heat exchanger needs to be frosted each time, the temperature does not need to be very low. Therefore, if the frosting method is overall frosting, the compensation coefficient is determined to be the second coefficient, and if the frosting method is segmented frosting, the compensation coefficient is determined to be the third coefficient, and the second coefficient is greater than the third coefficient.

[0077] If the first temperature difference is within the second preset temperature difference range, it means that the first temperature difference is relatively small, and in this case, the effect of frost on the air outlet effect is small. Therefore, the compensation coefficient can be directly determined based on the temperature difference. Specifically, the compensation coefficient is determined to be the fourth coefficient, and since the effect of frost on the air outlet effect is small, the third coefficient is smaller than the fourth coefficient, so that the indoor heat exchanger is frosted.

[0078] If the first temperature difference is within the third preset temperature difference range, it means that the first temperature difference is relatively smaller, and in this case, the effect of frost on the air outlet effect is also smaller. Therefore, the compensation coefficient can be directly determined based on the temperature difference. Specifically, the compensation coefficient is determined to be the fifth coefficient at this time, and since the effect of frost on the air outlet effect is smaller, the fourth coefficient is smaller than the fifth coefficient, so that it is easier to frost the indoor heat exchanger.

[0079] In this way, when the first temperature difference is large, the compensation coefficient is further determined according to the frosting mode to reduce the impact of frosting on the air outlet effect. When the first temperature difference is small, the compensation coefficient is determined according to the size of the preset temperature difference range in which the first temperature difference is located, so that when frosting has little impact on the air outlet effect, the conditions that facilitate frosting of the indoor heat exchanger are given priority.

[0080] Optionally, the first preset temperature difference range is (5°C, +∞). The second preset temperature difference range is (2°C, 5°C). The third preset temperature difference range is (-∞, 2°C).

[0081] Optionally, the second coefficient is 2. The third coefficient is 1.5. The fourth coefficient is 2. The fifth coefficient is 2.5.

[0082] Combination Figure 4 , the embodiment of the present disclosure provides another method for controlling self-cleaning of an indoor unit, comprising:

[0083] S101, when the air conditioner operates in cooling mode, the processor calculates a first temperature difference between the ambient temperature and the temperature set by the user.

[0084] S102: The processor determines an actual set temperature and a target wind speed according to the ambient humidity and the first temperature difference.

[0085] S113, the processor controls the indoor unit to perform overall frosting or segmented frosting according to the actual set temperature and target wind speed, and according to the ambient humidity and the first temperature difference.

[0086] As analyzed above, ambient humidity affects frosting efficiency, and the first temperature difference represents the difference between ambient temperature and the user's expected temperature. Frosting will affect the air outlet effect. The greater the difference between ambient temperature and the user's expected temperature, that is, the greater the first temperature difference, the more the user will feel the impact of frosting on the air outlet effect. Therefore, it is determined whether to perform overall frosting or segmented frosting based on ambient humidity and the first temperature difference. When controlling the frosting of the indoor heat exchanger, the air conditioner is controlled to run at the actual set temperature and target wind speed.

[0087] In this way, the indoor heat exchanger is controlled to perform overall frosting or segmented frosting based on the ambient humidity and the first temperature difference, which can not only ensure the frosting efficiency of the indoor heat exchanger, but also ensure the air outlet effect, thereby improving the user experience.

[0088] Optionally, in S113, the processor controls the indoor unit to perform overall frosting or segmented frosting according to the ambient humidity and the first temperature difference, including:

[0089] When the ambient humidity is within the same preset humidity range, if the first temperature difference is within the preset temperature difference range with the largest end value, the processor controls the indoor unit to perform overall frosting; if the first temperature difference is within the preset temperature difference range with a non-maximum end value, the processor controls the indoor unit to perform segmented frosting.

[0090] When the ambient humidity is within the same preset humidity range, that is, the ambient humidity has the same influence on the frosting efficiency, the influence of the first temperature difference on the frosting is further considered. Specifically, each preset humidity range corresponds to a plurality of preset temperature difference ranges with different end values. When the preset humidity range in which the ambient humidity is located is determined, it is necessary to further determine in which preset temperature difference range the first temperature difference is located.

[0091] If the end value of the preset temperature difference range where the first temperature difference value is located is the largest, it means that within this preset humidity range, the difference between the ambient temperature and the user's expected temperature is relatively large, that is, the cooling capacity demand is large. At this time, the air conditioner needs to cool extremely quickly and efficiently to significantly cool the room. Frosting of the indoor unit will reduce the cooling effect. Therefore, in this case, the indoor heat exchanger is controlled to perform overall frosting. In this way, all parts of the indoor heat exchanger are frosted at the same time, which can shorten the total frosting time compared to segmented frosting, and then shorten the duration of the impact of frosting on cooling, thereby ensuring the user experience.

[0092] On the contrary, if the first temperature difference is not the maximum value in the preset temperature difference range, it means that the user's demand for cooling capacity is relatively small. Therefore, at this time, the indoor heat exchanger is controlled to perform segmented frosting. When a part of the indoor heat exchanger is frosted, the other parts are cooled normally. In this way, although the overall frosting timeline is extended when performing segmented frosting, the air outlet effect can still be guaranteed, thereby ensuring the user experience.

[0093] In this way, when the indoor heat exchanger is controlled to perform frosting, based on the ambient humidity and the first temperature difference, a suitable frosting method is selected from the perspective of shortening the overall frosting time, or from the perspective of leaving some normal cooling capacity of the indoor heat exchanger to ensure the cooling and air outlet effect, so as to ensure the user experience.

[0094] Optionally, the processor controls the indoor unit to perform staged frosting, including:

[0095] When the ambient humidity is within the same preset humidity range, the smaller the end value of the preset temperature difference range in which the first temperature difference is located, the more segments of segmented frosting there are.

[0096] In the case of controlling the indoor heat exchanger to perform segmented frosting, when the ambient humidity is within the same preset humidity range, if the end value of the preset temperature difference range where the first temperature difference is located is smaller, it means that the user's demand for cooling capacity is smaller, and the overall frosting time of the indoor heat exchanger can be longer. At the same time, in order to balance the impact of long-term frosting on the cooling effect, the indoor heat exchanger can be controlled to be divided into more segments for frosting in turn. Therefore, if the end value of the preset temperature difference range where the first temperature difference is located is smaller, the number of frosted segments of the indoor heat exchanger is more.

[0097] Optionally, within the same humidity range, the indoor heat exchanger can be controlled to perform 1 / 2 frosting, 1 / 3 frosting or 1 / 4 frosting according to the divided temperature difference range. It can be understood that segmented frosting is that each segment of the indoor heat exchanger is frosted in turn. Taking the indoor heat exchanger performing 1 / 3 frosting as an example, the upper 1 / 3 part of the indoor heat exchanger is controlled to be frosted first, then the middle 1 / 3 part of the indoor heat exchanger is controlled to be frosted, and finally the lower 1 / 3 part of the indoor heat exchanger is controlled to be frosted, and finally the frosting of all positions is achieved.

[0098] In actual application, when the air conditioner operates in cooling mode, the indoor heat exchanger performs frosting, specifically:

[0099] 1. Current ambient humidity S ≥ 70%:

[0100] ①T1-T s >5℃, T s '=T s-a, according to the frosting model, predict the frosting duration and the target wind speed F of the indoor fan. Determine the specific value of a according to the frosting duration. Control the indoor unit to operate at Ts' and wind speed F, and control the indoor heat exchanger to perform overall frosting.

[0101] ②2℃ <T1-T s ≤5℃,T s '=T s -a, according to the frosting model, predict the frosting duration and the target wind speed F of the indoor fan. Determine the specific value of a according to the frosting duration. Control the indoor unit to operate at Ts', F wind speed, and control the indoor heat exchanger to perform 1 / 2 frosting.

[0102] ③T1-T s ≤2℃,T s '=T s -a, according to the frosting model, predict the frosting duration and the target wind speed F of the indoor fan. Determine the specific value of a according to the frosting duration. Control the indoor unit to operate at Ts', F wind speed, and control the indoor heat exchanger to perform 1 / 3 frosting.

[0103] In other cases, frosting is not performed and the system operates in normal mode.

[0104] If the temperature changes, the corresponding frosting plan will be executed, in which 1 / 2 frost and 1 / 3 frost are frosted in turn, and finally all positions of the indoor heat exchanger are frosted.

[0105] 2. When the ambient humidity is 50% ≤ S < 70%:

[0106] ①T1-T s >7℃, T s '=T s -a, according to the frosting model, predict the frosting duration and the target wind speed F of the indoor fan. Determine the specific value of a according to the frosting duration. Control the indoor unit to operate at Ts' and wind speed F, and control the indoor heat exchanger to perform overall frosting.

[0107] ②5℃ <T1-T s ≤7℃,T s '=T s -a, according to the frosting model, predict the frosting duration and the target wind speed F of the indoor fan. Determine the specific value of a according to the frosting duration. Control the indoor unit to operate at Ts', F wind speed, and control the indoor heat exchanger to perform 1 / 2 frosting.

[0108] ③2℃ <T1-T s ≤5℃,T s '=T s-a, according to the frosting model, predict the frosting duration and the target wind speed F of the indoor fan. Determine the specific value of a according to the frosting duration. Control the indoor unit to operate at Ts', F wind speed, and control the indoor heat exchanger to perform 1 / 3 frosting.

[0109] ④T1-T s ≤2℃,T s '=T s -a, according to the frosting model, predict the frosting duration and the target wind speed F of the indoor fan. Determine the specific value of a according to the frosting duration. Control the indoor unit to operate at Ts', F wind speed, and control the indoor heat exchanger to perform 1 / 4 frosting.

[0110] In other cases, frosting is not performed and the system operates in normal mode.

[0111] If the temperature changes, the corresponding frosting plan will be executed, in which 1 / 2 frosting, 1 / 3 frosting, and 1 / 4 frosting are performed in turn, and finally all positions of the indoor heat exchanger are frosted.

[0112] 3. Current ambient humidity S<50%:

[0113] ①T1-T s >5℃, T s '=T s -2a, according to the frosting model, predict the frosting duration and the target wind speed F of the indoor fan. Determine the specific value of a according to the frosting duration. Control the indoor unit to operate at Ts' and wind speed F, and control the indoor heat exchanger to perform overall frosting.

[0114] ②T1-T s >5℃, T s '=T s -1.5a, according to the frosting model, predict the frosting duration and the target wind speed F of the indoor fan. Determine the specific value of a according to the frosting duration. Control the indoor unit to operate at Ts', F wind speed, and control the indoor heat exchanger to perform 1 / 2 frosting.

[0115] ③2 <T1-T s ≤5℃,T s '=T s -2a, according to the frosting model, predict the frosting duration and the target wind speed F of the indoor fan. Determine the specific value of a according to the frosting duration. Control the indoor unit to operate at Ts', F wind speed, and control the indoor heat exchanger to perform 1 / 3 frosting.

[0116] ④T1-T s ≤2℃,T s '=T s-2.5a, according to the frosting model, predict the frosting duration and the target wind speed F of the indoor fan. Determine the specific value of a according to the frosting duration. Control the indoor unit to operate at Ts', F wind speed, and control the indoor heat exchanger to perform 1 / 4 frosting.

[0117] In other cases, frosting is not performed and the system operates in normal mode.

[0118] If the temperature changes, the corresponding frosting plan will be executed, in which 1 / 2 frosting, 1 / 3 frosting, and 1 / 4 frosting are performed in turn, and finally all positions of the indoor heat exchanger are frosted.

[0119] Combination Figure 5 As shown, the embodiment of the present disclosure provides a device 50 for controlling the self-cleaning of an indoor unit, comprising: a calculation module 51, a determination module 52 and an execution module 53. The calculation module 51 is configured to calculate a first temperature difference between the ambient temperature and the user-set temperature when the air conditioner is in a cooling mode. The determination module 52 is configured to determine the actual set temperature and the target wind speed according to the ambient humidity and the first temperature difference. The execution module 53 is configured to selectively perform overall frosting or segmented frosting according to the actual set temperature and the target wind speed.

[0120] By using the device 50 for controlling the self-cleaning of the indoor unit provided by the embodiment of the present disclosure, when the air conditioner operates in the cooling mode, the first temperature difference between the ambient temperature and the user-set temperature is calculated, and then the actual set temperature and the target wind speed are determined according to the ambient humidity and the first temperature difference, so that the indoor fan runs at the target speed, which is conducive to the frosting of the indoor heat exchanger. At the same time, the air conditioner runs at the actual set temperature, providing convenient conditions for frosting. When the overall frosting is selectively performed, the frosting efficiency can be improved. Compared with the overall frosting, when the segmented frosting is selectively performed, the indoor heat exchanger is partially frosted in turn, which can reduce the impact of frosting on the air outlet, so as to further ensure the air outlet effect.

[0121] Combination Figure 6 As shown, the embodiment of the present disclosure provides a device 60 for controlling the self-cleaning of an indoor unit, including a processor 61 and a memory 62. Optionally, the device 60 may also include a communication interface 63 and a bus 64. The processor 61, the communication interface 63, and the memory 62 may communicate with each other through the bus 64. The communication interface 63 may be used for information transmission. The processor 61 may call the logic instructions in the memory 62 to execute the method for controlling the self-cleaning of the indoor unit of the above embodiment.

[0122] In addition, the logic instructions in the memory 62 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0123] The memory 62 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 61 executes the program instructions / modules stored in the memory 62 to perform functional applications and data processing, that is, to implement the method for controlling the self-cleaning of the indoor unit in the above embodiment.

[0124] The memory 62 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 62 may include a high-speed random access memory and may also include a non-volatile memory.

[0125] Combination Figure 7 As shown, the embodiment of the present disclosure provides an indoor unit 10, including: an indoor unit body, and the above-mentioned device 50 (60) for controlling the self-cleaning of the indoor unit. The device 50 (60) for controlling the self-cleaning of the indoor unit is installed on the indoor unit body. The installation relationship described here is not limited to placement inside the indoor unit body, but also includes installation connections with other components of the indoor unit 10, including but not limited to physical connections, electrical connections or signal transmission connections. It can be understood by those skilled in the art that the device 50 (60) for controlling the self-cleaning of the indoor unit can be adapted to a feasible product body, thereby realizing other feasible embodiments.

[0126] An embodiment of the present disclosure provides an air conditioner, comprising the indoor unit 10 described above.

[0127] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling the self-cleaning of an indoor unit.

[0128] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, such as: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk, and other media that can store program codes.

[0129] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0130] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0131] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0132] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling self-cleaning of an indoor unit, characterized in that: The indoor unit includes: Indoor heat exchanger, the indoor heat exchanger is provided with a plurality of independently controlled on-off refrigerant branches, and the plurality of refrigerant branches correspond to different parts of the indoor heat exchanger respectively; the method comprises: When the air conditioner is in cooling mode, calculating a first temperature difference between the ambient temperature and the temperature set by the user; Determining the actual set temperature and the target wind speed according to the ambient humidity and the first temperature difference; Selectively perform overall frosting or segmented frosting according to the actual set temperature and target wind speed.

2. The method according to claim 1, characterized in that: Determining the actual set temperature according to the ambient humidity and the first temperature difference includes: Predicting the frosting duration of the indoor heat exchanger according to the ambient humidity and the first temperature difference; Determine the temperature compensation value according to the frosting duration; According to the temperature compensation value, the actual set temperature is determined.

3. The method according to claim 2, characterized in that According to the temperature compensation value, determine the actual set temperature, including: Calculate a second temperature difference between the user set temperature and the temperature compensation value; The second temperature difference is determined as the actual set temperature.

4. The method according to claim 3, characterized in that Calculating a second temperature difference between a user set temperature and a temperature compensation value, comprising: Determining a compensation coefficient according to the ambient humidity and the first temperature difference; Calculate the product of the compensation coefficient and the temperature compensation value; The difference between the user set temperature and the product is used as the second temperature difference.

5. The method according to claim 4, characterized in that Determining a compensation coefficient according to the ambient humidity and the first temperature difference includes: When the ambient humidity is within the first preset humidity range or the second preset humidity range, determining the compensation coefficient to be the first coefficient; When the ambient humidity is within a third preset humidity range, determining a compensation coefficient according to the first temperature difference; The end value of the first preset humidity range is greater than the end value of the second preset humidity range, and the end value of the second preset humidity range is greater than the end value of the third preset humidity range.

6. The method according to claim 5, characterized in that Determining a compensation coefficient according to the first temperature difference includes: When the first temperature difference is within the first preset temperature difference range and the frosting mode is overall frosting, determining the compensation coefficient to be the second coefficient; When the first temperature difference is within the first preset temperature difference range and the frosting method is segmented frosting, determining the compensation coefficient to be the third coefficient; When the first temperature difference is within the second preset temperature difference range, determining the compensation coefficient to be a fourth coefficient; When the first temperature difference is within the third preset temperature difference range, determining the compensation coefficient to be a fifth coefficient; Among them, the end value of the first preset temperature difference range is greater than the end value of the second preset temperature difference range, the end value of the second preset temperature difference range is greater than the end value of the third preset temperature difference range; the second coefficient is greater than the third coefficient, the third coefficient is less than the fourth coefficient, and the fourth coefficient is less than the fifth coefficient.

7. The method according to any one of claims 1 to 6, characterized in that Selectively perform overall or segmented frosting, including: According to the ambient humidity and the first temperature difference, overall frosting or segmented frosting is performed.

8. The method according to claim 7, characterized in that According to the ambient humidity and the first temperature difference, overall frosting or segmented frosting is performed, including: When the ambient humidity is within the same preset humidity range, if the first temperature difference is within the preset temperature difference range with the largest end value, overall frosting is performed; if the first temperature difference is within the preset temperature difference range with a non-maximum end value, segmented frosting is performed.

9. A device for controlling the self-cleaning of an indoor unit, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for controlling self-cleaning of an indoor unit according to any one of claims 1 to 8 when running the program instructions.

10. An indoor unit, characterized in that: include: Indoor unit body; The device for controlling the self-cleaning of the indoor unit as claimed in claim 9 is installed on the indoor unit body.

11. An air conditioner, characterized in that: Includes the indoor unit as claimed in claim 10.

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