Frequency control method, controller, compressor, air conditioner and storage medium

Abstract

The embodiment of the invention provides a frequency control method, a controller, a compressor, an air conditioner and a storage medium. The frequency control method comprises the steps that the indoor temperature and the set temperature of the air conditioner are obtained; when the temperature difference value between the indoor temperature and the set temperature is within the threshold value range within the preset time, it is determined that the air conditioner is in the stable operation stage; the target frequency increment in the stable operation stage is determined, and the frequency of the compressor is corrected according to the target frequency increment; wherein the target frequency increment is determined through one of the following modes: the target frequency increment is determined according to a temperature difference value between the indoor temperature and the set temperature, and the target frequency increment is determined according to the change trend of the indoor temperature. Due to the fact that the operation frequency of the compressor can be continuously adjusted in the stable operation stage according to the temperature difference value between the indoor temperature and the set temperature or the change trend of the indoor temperature, the system energy consumption can be continuously optimized, in addition, the indoor temperature can be kept close to the set temperature, and the temperature control precision is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and particularly relates to a frequency control method, a controller, a compressor, an air conditioner, and a storage medium. Background Art

[0002] In the related art, with the global warming and the development of the economy, more and more people are used to keeping the air conditioner on for a long time. Therefore, how to reduce energy consumption while ensuring comfort is crucial for air conditioner manufacturers. Currently, the control method is to divide the refrigeration process into different stages according to the operating time, obtain the upper limit of the operating frequency of the compressor in different stages, and use this upper limit to limit the frequency of the compressor, so as to achieve the purpose of energy saving.

[0003] However, there are problems with limited temperature control accuracy and energy saving rate in the specific implementation of the above control method. Specifically, on the one hand, this control method only considers the influence of time on frequency. As a rough adjustment means, it can reduce energy consumption, but it cannot make the system energy consumption reach the optimal value. On the other hand, this control method may reduce the temperature control accuracy while limiting the frequency. For example, when the air-conditioned room is exposed to the west sun or the set temperature is relatively low, the frequency limiting strategy may cause the indoor temperature not to be maintained at the set temperature, resulting in discomfort for users. Summary of the Invention

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present application provides a frequency control method, a controller, a compressor, an air conditioner, and a storage medium, aiming to improve the energy saving effect and temperature control accuracy of the air conditioner.

[0005] In a first aspect, an embodiment of the present application provides a frequency control method, including:

[0006] Obtain the indoor temperature and the set temperature of the air conditioner;

[0007] When the temperature difference between the indoor temperature and the set temperature is within the threshold range within a preset time, determine that the air conditioner is in a stable operation stage;

[0008] Determine the target frequency increment in the stable operation stage, and correct the frequency of the compressor according to the target frequency increment; wherein, the target frequency increment is determined by one of the following methods: determining the target frequency increment according to the temperature difference between the indoor temperature and the set temperature, and determining the target frequency increment according to the change trend of the indoor temperature.

[0009] According to some embodiments of the present application, before determining that the air conditioner is in the stable operation stage, the frequency control method further includes:

[0010] Receive a refrigeration instruction, and determine that the air conditioner enters a cooling stage according to the refrigeration instruction;

[0011] For the cooling stage, obtain the first outdoor temperature, and determine the initial operating frequency and the maximum operating frequency of the compressor according to the first outdoor temperature.

[0012] According to some embodiments of the present application, the stable operation stage includes one of the following:

[0013] A temperature stable stage, wherein the temperature difference corresponding to the temperature stable stage is within a first threshold range within a first preset time;

[0014] A long-term stable stage, wherein the temperature difference corresponding to the long-term stable stage is within a second threshold range within a second preset time, the second preset time is greater than the first preset time, and the second threshold range is less than or equal to the first threshold range.

[0015] According to some embodiments of the present application, the determining the target frequency increment according to the temperature difference between the indoor temperature and the set temperature includes:

[0016] In the case where the stable operation stage is a temperature stable stage, when the temperature difference between the indoor temperature and the set temperature is greater than a first preset value, determine a first frequency increment according to the indoor temperature and the set temperature;

[0017] Take the first frequency increment as the target frequency increment.

[0018] According to some embodiments of the present application, the determining the target frequency increment according to the temperature difference between the indoor temperature and the set temperature includes:

[0019] In the case where the stable operation stage is a long-term stable stage, when the temperature difference between the indoor temperature and the set temperature is greater than a first preset value, determine a first frequency increment according to the indoor temperature and the set temperature;

[0020] Based on the first frequency increment and a preset downward adjustment parameter, obtain a second frequency increment, and take the second frequency increment as the target frequency increment.

[0021] According to some embodiments of the present application, the determining the first frequency increment according to the indoor temperature and the set temperature includes one of the following:

[0022] When the indoor temperature is greater than the set temperature, determine that the first frequency increment is a positive number;

[0023] When the indoor temperature is less than the set temperature, determine that the first frequency increment is a negative number.

[0024] According to some embodiments of the present application, the relationship between the preset down-regulation parameter and time is a positive correlation.

[0025] According to some embodiments of the present application, determining the target frequency increment according to the change trend of the indoor temperature includes:

[0026] Obtaining the temperature change value of the indoor temperature within a preset sampling period and the second outdoor temperature;

[0027] Determining a third frequency increment according to the temperature change value and the second outdoor temperature, and using the third frequency increment as the target frequency increment.

[0028] According to some embodiments of the present application, determining the third frequency increment according to the temperature change value and the second outdoor temperature includes one of the following:

[0029] When the temperature change value is greater than zero, determining a corresponding target temperature range according to the second outdoor temperature, where the target temperature range is one of multiple preset temperature ranges, and each preset temperature range is provided with a first preset increment with a positive value, and using the first preset increment corresponding to the target temperature range as the third frequency increment;

[0030] When the temperature change value is less than zero, determining a corresponding target temperature range according to the second outdoor temperature, where the target temperature range is one of multiple preset temperature ranges, and each preset temperature range is provided with a second preset increment with a negative value, and using the second preset increment corresponding to the target temperature range as the third frequency increment.

[0031] According to some embodiments of the present application, the frequency control method further includes:

[0032] The relationship between the preset temperature range and the first preset increment is a positive correlation;

[0033] The relationship between the preset temperature range and the second preset increment is a negative correlation.

[0034] According to some embodiments of the present application, the frequency control method further includes:

[0035] In the case that the stable operation stage is a long-term stable stage, after every preset time period, controlling the frequency of the compressor to decrease by a fourth frequency increment.

[0036] In a second aspect, an embodiment of the present application provides a controller, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where when the processor runs the computer program, it executes the frequency control method as described in the first aspect above.

[0037] In a third aspect, an embodiment of the present application provides a compressor, including the controller as described in the second aspect above.

[0038] In a fourth aspect, an embodiment of the present application provides an air conditioner, including the controller as described in the second aspect above or the compressor as described in the third aspect above.

[0039] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions for executing the frequency control method as described in the first aspect above.

[0040] According to the technical solution of the embodiment of the present application, there are at least the following beneficial effects: First, the embodiment of the present application obtains the indoor temperature and the set temperature of the air conditioner; then, when the temperature difference between the indoor temperature and the set temperature is within the threshold range within a preset time, the embodiment of the present application determines that the air conditioner is in a stable operation stage; then, the embodiment of the present application determines the target frequency increment according to the temperature difference between the indoor temperature and the set temperature and / or the change trend of the indoor temperature, and corrects the frequency of the compressor according to the target frequency increment. Since the embodiment of the present application can continuously adjust the operating frequency of the compressor according to the temperature difference between the indoor temperature and the set temperature or the change trend of the indoor temperature during the stable operation stage, the system energy consumption can be continuously optimized. In addition, the indoor temperature can be maintained near the set temperature, improving the temperature control accuracy. Therefore, the embodiment of the present application can improve the energy-saving effect and temperature control accuracy of the air conditioner, and also improve the user's comfort.

[0041] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. Description of the Drawings

[0042] The drawings are used to provide a further understanding of the technical solution of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application, and do not constitute a limitation to the technical solution of the present application.

[0043] Figure 1 is a flowchart of the frequency control method provided by an embodiment of the present application;

[0044] Figure 2 is a flowchart of the frequency control method provided by another embodiment of the present application;

[0045] Figure 3 is a flowchart of the frequency control method provided by another embodiment of the present application;

[0046] Figure 4 is a flowchart of the frequency control method provided by another embodiment of the present application;

[0047] Figure 5 is a flowchart of a frequency control method provided by another embodiment of the present application;

[0048] Figure 6 is a flowchart of a frequency control method provided by another embodiment of the present application;

[0049] Figure 7 is a flowchart of a frequency control method provided by another embodiment of the present application;

[0050] Figure 8 is a flowchart of a frequency control method provided by another embodiment of the present application;

[0051] Figure 9 is a flowchart of a frequency control method provided by another embodiment of the present application;

[0052] Figure 10 is a flowchart of a frequency control method provided by another embodiment of the present application;

[0053] Figure 11 is an overall flowchart of a frequency control method provided by an embodiment of the present application;

[0054] Figure 12 is a specific flowchart of the frequency control method provided by an embodiment of the present application in the stable stage;

[0055] Figure 13 is a schematic diagram of a controller for implementing the frequency control method provided by an embodiment of the present application. Detailed Description of the Embodiment

[0056] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and should not be construed as limiting the present application.

[0057] In the description of the present application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

[0058] In the description of the present application, the meaning of "a number of" is one or more, the meaning of "a plurality of" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the corresponding number, while understandings such as "above", "below", "within", etc. include the corresponding number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0059] In the description of the present application, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific content of the technical solution.

[0060] In some cases, with the global warming of the temperature and the development of the economy, more and more people are used to keeping the air conditioner on for a long time. Therefore, how to reduce energy consumption while ensuring comfort is crucial for air conditioner enterprises. In this regard, the current control method is to divide the refrigeration process into different stages according to the running time, obtain the upper limit of the running frequency of the compressor in different stages, and use this upper limit to limit the frequency of the compressor, so as to achieve the purpose of energy saving.

[0061] However, the above control method can limit the compressor frequency according to the time change, and can effectively reduce the energy consumption when the air conditioner is turned on for a long time. However, there will be problems with limited temperature control accuracy and energy saving rate in the specific implementation process. Specifically, on the one hand, this control method only considers the influence of time on the frequency. As a rough adjustment means, it can reduce energy consumption, but it cannot make the system energy consumption reach the optimal; on the other hand, this control method may reduce the temperature control accuracy while limiting the frequency. For example, when the air-conditioned room is exposed to the west sun or the set temperature is relatively low, its frequency limiting strategy may cause the indoor temperature not to be maintained at the set temperature, resulting in discomfort for users.

[0062] All in all, the existing energy-saving control algorithms for variable-frequency air conditioners have problems of limited energy saving rate and low temperature control accuracy. The reason is that the existing methods only achieve energy saving by means of simply limiting the compressor frequency.

[0063] Based on the above situation, the embodiments of the present application propose a frequency control method, a controller, a compressor, an air conditioner and a storage medium, aiming to improve the energy-saving effect and temperature control accuracy of the air conditioner.

[0064] The following further elaborates on each embodiment of the frequency control method of the present application with reference to the accompanying drawings.

[0065] As Figure 1 shown, Figure 1It is a flowchart of a frequency control method provided by an embodiment of the present application. The frequency control method may include but is not limited to steps S110, S120, S130, and S140.

[0066] Step S110: Obtain the indoor temperature and the set temperature of the air conditioner;

[0067] Step S120: When the temperature difference between the indoor temperature and the set temperature is within the threshold range within a preset time, determine that the air conditioner is in the stable operation stage;

[0068] Step S130: Determine the target frequency increment in the stable operation stage according to the temperature difference between the indoor temperature and the set temperature, and / or the change trend of the indoor temperature;

[0069] Step S140: Correct the frequency of the compressor according to the target frequency increment.

[0070] In one embodiment, first, the embodiment of the present application will detect the indoor temperature in real time and also obtain the set temperature set by the user; then, the embodiment of the present application will calculate the temperature difference between the indoor temperature and the set temperature and compare this temperature difference with the threshold range. If this temperature difference has been within the threshold range within a preset time, it indicates that the indoor temperature has been maintained near the set temperature for a long time. Then, at this time, it can be considered that the air conditioner enters the stable operation stage; then, in the stable operation stage, the embodiment of the present application will determine the target frequency increment and use this target frequency increment to modify the operating frequency of the compressor.

[0071] It should be noted that regarding the above method for obtaining the target frequency increment, it can be obtained through one or both of the following methods: First, obtain the target frequency increment in the stable operation stage based on the temperature difference between the indoor temperature and the set temperature; Second, obtain the target frequency increment in the stable operation stage based on the change trend of the indoor temperature.

[0072] In addition, it can be understood that regarding the above method for obtaining the indoor temperature, it can be detected by a temperature sensor in the room or input by the user. The embodiment of the present application does not make specific limitations on the method for obtaining the indoor temperature.

[0073] In addition, it can be understood that regarding the above set temperature, it can be set by the user through a remote control, or by the user through a mobile terminal, or by the user through a voice method, or by other methods. The embodiment of the present application does not make specific limitations on the setting method of the set temperature.

[0074] In addition, it can be understood that the above-mentioned preset time can be set by the system or the user. The preset time can be half an hour, one hour, or other durations. The embodiments of the present application do not specifically limit the duration of the above-mentioned preset time.

[0075] In addition, it can be understood that the above-mentioned threshold range can be set by the system or the user. The threshold range can be from -0.5°C to 0.5°C, from -1°C to 1°C, from -0.5°C to 1°C, or other ranges. The embodiments of the present application do not specifically limit this.

[0076] It should be noted that since the temperature difference between the indoor temperature and the set temperature can reflect the gap between the indoor temperature and the set temperature, therefore, the embodiments of the present application can obtain the corresponding target frequency increment through this temperature difference, and use this target frequency increment to roughly adjust the compressor frequency. In addition, since the change trend of the indoor temperature reflects the trend of the indoor temperature, therefore, the embodiments of the present application can obtain the corresponding target frequency increment through the change trend, and use this target frequency increment to finely adjust the compressor frequency.

[0077] In addition, it should be noted that if two target frequency increments are obtained respectively through the above two acquisition methods at the same time, then at this time, the embodiments of the present application will use these two target frequency increments to correct the frequency of the compressor simultaneously.

[0078] It is worth noting that since the embodiments of the present application can continuously adjust the operating frequency of the compressor according to the temperature difference between the indoor temperature and the set temperature or the change trend of the indoor temperature during the stable operation stage, thereby continuously optimizing the system energy consumption. In addition, it will also keep the indoor temperature near the set temperature, improving the temperature control accuracy. Therefore, the embodiments of the present application can improve the energy-saving effect and temperature control accuracy of the air conditioner, and also improve the user comfort.

[0079] Among them, the above-mentioned temperature control accuracy can refer to: when the indoor temperature reaches the constant temperature section, the upper and lower limit values of the deviation value of the indoor temperature relative to the set temperature.

[0080] In addition, as Figure 2 shown, Figure 2 is a flowchart of a frequency control method provided by another embodiment of the present application. Before determining that the air conditioner is in the stable operation stage, the frequency control method further includes but is not limited to step S210 and step S220.

[0081] Step S210: Receive a cooling instruction, and determine that the air conditioner enters the cooling stage according to the cooling instruction;

[0082] Step S220: For the cooling stage, obtain the first outdoor temperature, and determine the initial operating frequency and the maximum operating frequency of the compressor according to the first outdoor temperature.

[0083] In an embodiment, when the air conditioner receives a cooling instruction, it will start up in the cooling mode and enter the cooling stage after startup; since the indoor temperature at startup is quite different from the set temperature, in order to make the indoor temperature drop to the set temperature faster, it is necessary to control the air conditioner to enter the rapid cooling stage. Specifically, the compressor can be controlled to operate at the maximum operating frequency.

[0084] It should be noted that since the outdoor ambient temperature will continuously radiate into the room, the indoor ambient temperature will be affected by the outdoor ambient temperature. In this regard, in order to match the influence of different outdoor ambient temperatures on the cooling process of the air conditioner and to quickly drop the indoor temperature to the set temperature, the embodiment of the present application can obtain the first outdoor temperature and determine the magnitude of the initial operating frequency and the maximum operating frequency of the compressor based on the magnitude of the first outdoor temperature.

[0085] In addition, it should be noted that if the first outdoor temperature is higher, the indoor cooling effect will be slower. In this regard, the embodiment of the present application can appropriately increase the initial operating frequency and the maximum operating frequency of the compressor; on the contrary, if the first outdoor temperature is lower, the indoor cooling effect will be faster. In this regard, the embodiment of the present application can appropriately reduce the initial operating frequency and the maximum operating frequency of the compressor. It can be seen that there can be a positive correlation between the first outdoor temperature, the initial operating frequency, and the maximum operating frequency.

[0086] It can be understood that regarding the above-mentioned cooling instruction, it can be sent by the user through the remote control, or by the user through the mobile terminal, or by the user informing the air conditioner in a voice manner, or set in other ways. The embodiment of the present application does not specifically limit the generation and acquisition methods of the cooling instruction.

[0087] In addition, it can be understood that regarding the acquisition method of the above-mentioned first outdoor temperature, it can be detected by an outdoor temperature sensor, or the local outdoor ambient temperature can be obtained by networking, or obtained by other methods. The embodiment of the present application does not specifically limit the acquisition method of the first outdoor temperature.

[0088] In an embodiment, after the air conditioner experiences the cooling stage, it will enter the stable operation stage. Among them, the stable operation stage includes but is not limited to the following two stages:

[0089] The first stable operation stage: the temperature stable stage; among them, in this temperature stable stage, the temperature difference between the indoor temperature and the set temperature has been within the first threshold range within the first preset time.

[0090] The second stable operation stage: the long-term stable stage; wherein, in this long-term stable stage, the temperature difference between the indoor temperature and the set temperature has been within the second threshold range within the second preset time, the second preset time is greater than the first preset time, and the second threshold range is less than or equal to the first threshold range.

[0091] It can be understood that regarding the above-mentioned first preset time, it can be set by the system or the user independently. This preset time can be twenty minutes, or half an hour, or other durations. The embodiments of the present application do not specifically limit the duration of the above-mentioned first preset time.

[0092] In addition, it can be understood that regarding the above-mentioned second preset time, it can be set by the system or the user independently. This preset time can be forty minutes, or one hour, or other durations. The embodiments of the present application do not specifically limit the duration of the above-mentioned second preset time.

[0093] In addition, it can be understood that regarding the above-mentioned first threshold range, it can be set by the system or the user independently. This threshold range can be from -0.8°C to 0.8°C, or from -1°C to 1°C, or other ranges. The embodiments of the present application do not specifically limit this.

[0094] In addition, it can be understood that regarding the above-mentioned second threshold range, it can be set by the system or the user independently. This threshold range can be from -0.3°C to 0.3°C, or from -0.5°C to 0.5°C, or other ranges. The embodiments of the present application do not specifically limit this.

[0095] In one embodiment, after the air conditioner has experienced the cooling stage, it will first enter the temperature stable stage, and then enter the long-term stable stage.

[0096] In addition, it should be noted that regarding the determination of the target frequency increment in the stable operation stage according to the temperature difference between the indoor temperature and the set temperature in the above step S130, according to the different stages, it can be divided into Figure 3 or Figure 4 two implementation cases as follows:

[0097] As Figure 3 shown, Figure 3 is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the determination of the target frequency increment in the stable operation stage according to the temperature difference between the indoor temperature and the set temperature in the above step S130, it may include but is not limited to step S310 and step S320.

[0098] Step S310: When the stable operation stage is the temperature stable stage, if the temperature difference between the indoor temperature and the set temperature is greater than the first preset value, determine the first frequency increment according to the indoor temperature and the set temperature;

[0099] Step S320: Use the first frequency increment as the target frequency increment.

[0100] In an embodiment, when the air conditioner is operating in the temperature stable stage, the temperature difference between the indoor temperature and the set temperature is compared with the first preset value. If the temperature difference is higher than the first preset value, at this time, it will trigger the determination of the first frequency increment according to the indoor temperature and the set temperature, and use this first frequency increment as the target frequency increment.

[0101] It should be noted that regarding the above-mentioned first preset value, it is the triggering accuracy. If the temperature difference between the indoor temperature and the set temperature reaches this triggering accuracy, the calculation of the first frequency increment will be triggered.

[0102] It can be understood that the value of the above-mentioned first preset value can be set by the system or the user independently. The threshold range can be 0.5°C, or 0.6°C, or other values. The embodiments of the present application do not make specific limitations on this.

[0103] As Figure 4 shown, Figure 4 is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the determination of the target frequency increment in the stable operation stage according to the temperature difference between the indoor temperature and the set temperature in step S130 above, it may include but is not limited to steps S410 and S420.

[0104] Step S410: When the stable operation stage is the long-term stable stage, if the temperature difference between the indoor temperature and the set temperature is greater than the first preset value, determine the first frequency increment according to the indoor temperature and the set temperature;

[0105] Step S420: Obtain a second frequency increment based on the first frequency increment and a preset downward adjustment parameter, and use the second frequency increment as the target frequency increment.

[0106] In an embodiment, when the air conditioner is operating in the long-term stable stage, the temperature difference between the indoor temperature and the set temperature is compared with the first preset value. If the temperature difference is higher than the first preset value, at this time, it will trigger the determination of the first frequency increment according to the indoor temperature and the set temperature, and based on the preset downward adjustment parameter, the first frequency increment is adjusted downward to obtain the second frequency increment, and this second frequency increment is used as the target frequency increment.

[0107] It should be noted that since the indoor temperature fluctuation in the long-term stable stage is smaller than that in the temperature stable stage, therefore,Figure 4 the obtained target frequency increment ratio Figure 3 is smaller than the obtained target frequency increment. In this regard, the embodiment of the present application can down-regulate the first frequency increment based on a preset down-regulation parameter to obtain a second frequency increment.

[0108] It should be noted that the above-mentioned preset down-regulation parameter can be a proportionality coefficient. For example, dividing the first frequency increment by this proportionality coefficient can obtain a second frequency increment smaller than the value of the first frequency increment; alternatively, the preset down-regulation parameter can also be a frequency amplitude. For example, subtracting this frequency amplitude from the first frequency increment can obtain a second frequency increment smaller than the value of the first frequency increment. Alternatively, the preset down-regulation parameter can also be other types of parameters, and the embodiment of the present application does not make specific limitations on this.

[0109] It can be understood that the numerical value of the above-mentioned preset down-regulation parameter can be set by the system or the user independently, and the embodiment of the present application does not make specific limitations on this.

[0110] In addition, it should be noted that regarding the above-mentioned first preset value, it is the trigger accuracy. If the temperature difference between the indoor temperature and the set temperature reaches this trigger accuracy, the calculation of the first frequency increment will be triggered.

[0111] It can be understood that the numerical value of the above-mentioned first preset value can be set by the system or the user independently. The threshold range can be 0.5°C, or 0.6°C, or other values, and the embodiment of the present application does not make specific limitations on this.

[0112] In one embodiment, the relationship between the preset down-regulation parameter and time is a positive correlation. In other words, the longer the duration of the air conditioner in the long-term stable stage, the larger the preset down-regulation parameter will be, and correspondingly, the smaller the second frequency increment will be, so that the frequency of the compressor can become more stable over time.

[0113] In addition, it should be noted that regarding the determination of the first frequency increment according to the indoor temperature and the set temperature in the above-mentioned steps S310 and S410, according to the different numerical values of the two, it can be divided into Figure 5 or Figure 6 two implementation cases as follows:

[0114] As Figure 5 shown,[[]]END]] Figure 5 is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the determination of the first frequency increment according to the indoor temperature and the set temperature in the above-mentioned steps S310 and S410, it may include but is not limited to steps S510 and S520.

[0115] Step S510: When the indoor temperature is greater than the set temperature;

[0116] Step S520: Determine that the first frequency increment is a positive number.

[0117] As Figure 6 shown, Figure 6 FIG. is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the determination of the first frequency increment according to the indoor temperature and the set temperature in the above steps S310 and S410, it may include but is not limited to steps S610 and S620.

[0118] Step S610: When the indoor temperature is less than the set temperature;

[0119] Step S620: Determine that the first frequency increment is a negative number.

[0120] In one embodiment, based on Figure 5 and Figure 6 in the control method, if the indoor temperature is greater than the set temperature, it indicates that the indoor temperature is relatively high at this time. Then the first frequency increment at this time is a positive number, and by positively coarsely adjusting the operating frequency of the compressor, the operating frequency of the compressor is increased, thereby enhancing the refrigeration effect. Conversely, if the indoor temperature is less than the set temperature, it indicates that the indoor temperature is relatively low at this time. Then the first frequency increment at this time is a negative number, and by negatively coarsely adjusting the operating frequency of the compressor, the operating frequency of the compressor is reduced, thereby weakening the refrigeration effect.

[0121] In addition, it can be understood that if the indoor temperature is equal to the set temperature, then the first frequency increment at this time is zero.

[0122] In addition, as Figure 7 shown, Figure 7 FIG. is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the determination of the target frequency increment according to the change trend of the indoor temperature in the above step S130, it may include but is not limited to steps S710 and S720.

[0123] Step S710: Obtain the temperature change value of the indoor temperature within a preset sampling period and the second outdoor temperature;

[0124] Step S720: Determine the third frequency increment according to the temperature change value and the second outdoor temperature, and use the third frequency increment as the target frequency increment.

[0125] In one embodiment, when the air conditioner is in the temperature stable stage or the long-term stable stage, the embodiment of the present application obtains the indoor temperatures of multiple preset sampling periods, and calculates the temperature change value of the indoor temperature based on the indoor temperatures of multiple preset sampling periods; then, calculates the third frequency increment based on the magnitude of the temperature change value and the second outdoor temperature, and takes the third frequency increment as the target frequency increment.

[0126] In addition, it should be noted that regarding the determination of the third frequency increment according to the temperature change value and the second outdoor temperature in the above step S720, according to the different magnitudes of the temperature change value, it can be divided into Figure 8 or Figure 9 two implementation cases as follows:

[0127] As Figure 8 shown, Figure 8 is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the determination of the third frequency increment according to the temperature change value and the second outdoor temperature in the above step S720, it may include but is not limited to step S810 and step S820.

[0128] Step S810: When the temperature change value is greater than zero, determine the corresponding target temperature range according to the second outdoor temperature, where the target temperature range is one of multiple preset temperature ranges, and each preset temperature range is provided with a first preset increment with a positive value;

[0129] Step S820: Take the first preset increment corresponding to the target temperature range as the third frequency increment.

[0130] In one embodiment, if the temperature change value is greater than zero, that is, when the trend of the indoor temperature is an upward trend, the embodiment of the present application determines a positive fine adjustment increment, that is, the third frequency increment, and increases the operating frequency of the compressor through positive correction, so that the operating frequency of the compressor increases, thereby enhancing the refrigeration effect.

[0131] It should be noted that the embodiment of the present application also determines the magnitude of the third frequency increment according to the second outdoor temperature. When the temperature change value is greater than zero, if the second outdoor temperature is higher, the third frequency increment is larger; if the second outdoor temperature is lower, the third frequency increment is smaller.

[0132] Specifically, the embodiment of the present application can set multiple preset temperature ranges. For example, it can be set to be divided into a normal temperature range, a medium-high temperature range, and a high temperature range according to the second outdoor temperature, and each range corresponds to a first preset increment with a positive value. When the temperature change value is greater than zero, the first preset increment corresponding to the high temperature range is greater than the first preset increment corresponding to the medium-high temperature range, and the first preset increment corresponding to the medium-high temperature range is greater than the first preset increment corresponding to the normal temperature range.

[0133] It can be understood that the number of the above-mentioned preset temperature ranges can be two, or three or more. The embodiments of the present application do not make specific limitations on this.

[0134] As Figure 9 shown, Figure 9 is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the determination of the third frequency increment according to the temperature change value and the second outdoor temperature in step S720 above, it may include but is not limited to steps S910 and S920.

[0135] Step S910: When the temperature change value is less than zero, determine the corresponding target temperature range according to the second outdoor temperature, where the target temperature range is one of multiple preset temperature ranges, and each preset temperature range is provided with a second preset increment with a negative value;

[0136] Step S920: Take the second preset increment corresponding to the target temperature range as the third frequency increment.

[0137] In one embodiment, if the temperature change value is less than zero, that is, when the indoor temperature trend is a downward trend, the embodiments of the present application will determine a negative fine-tuning increment, that is, the third frequency increment, and by negatively correcting the operating frequency of the compressor, the operating frequency of the compressor is reduced, thereby weakening the refrigeration effect.

[0138] It should be noted that the embodiments of the present application will also determine the magnitude of the third frequency increment according to the second outdoor temperature. When the temperature change value is less than zero, if the second outdoor temperature is higher, the third frequency increment is smaller; if the second outdoor temperature is lower, the third frequency increment is larger.

[0139] Specifically, the embodiments of the present application can set multiple preset temperature ranges. For example, it can be set to be divided into a normal temperature range, a medium-high temperature range, and a high temperature range according to the second outdoor temperature, and each range corresponds to a second preset increment with a negative value. When the temperature change value is less than zero, the second preset increment corresponding to the high temperature range is less than the second preset increment corresponding to the medium-high temperature range, and the second preset increment corresponding to the medium-high temperature range is less than the second preset increment corresponding to the normal temperature range.

[0140] It can be understood that the number of the above-mentioned preset temperature ranges can be two, or three or more. The embodiments of the present application do not make specific limitations on this.

[0141] In one embodiment, the relationship between the preset temperature range and the first preset increment is a positive correlation relationship, that is, the higher the temperature corresponding to the preset temperature range, the larger the first preset increment; the lower the temperature corresponding to the preset temperature range, the smaller the first preset increment.

[0142] In one embodiment, the relationship between the preset temperature range and the second preset increment is a negative correlation, that is, the higher the temperature corresponding to the preset temperature range, the smaller the second preset increment; the lower the temperature corresponding to the preset temperature range, the larger the second preset increment.

[0143] In addition, as Figure 10 shown, Figure 10 is a flowchart of a frequency control method provided by another embodiment of the present application. The frequency control method of the embodiment of the present application may further include, but is not limited to, step S1010 and step S1020.

[0144] Step S1010, determine that the stable operation stage is a long-term stable stage;

[0145] Step S1020, after every preset time interval, control the frequency of the compressor to decrease by a fourth frequency increment.

[0146] In one embodiment, if the air conditioner is operating in the long-term stable stage, the embodiment of the present application will also reduce the frequency of the compressor by a fourth frequency increment every preset time interval, so as to gradually smooth the operating frequency of the compressor.

[0147] It can be understood that the value of the above-mentioned preset time interval can be set by the system or the user independently, and it can be 10 minutes, or 20 minutes, or other time intervals. The embodiment of the present application does not make specific limitations on this.

[0148] Based on the frequency control methods of the above various embodiments, the overall embodiments of the frequency control method of the present application are respectively proposed below.

[0149] As Figure 11 shown, Figure 11 is the overall flowchart of the frequency control method provided by an embodiment of the present application. The overall process includes, but is not limited to, step S1110, step S1120, step S1130, and step S1140.

[0150] Step S1110, when the air conditioner starts in the cooling mode and is in the temperature reduction stage 1, determine the initial frequency and the frequency upper limit value of the compressor according to the outdoor temperature;

[0151] Step S1120, according to the difference between the indoor temperature and the set temperature, calculate the frequency increment Δf according to the original variable frequency control logic;

[0152] Step S1130, if the indoor temperature reaches the set temperature and remains within the threshold 1 for a preset time 1, enter the temperature stable stage 2, and calculate the compressor operating frequency increment Δf according to the temperature stable stage operation logic;

[0153] Step S1140: If the indoor temperature remains within the set temperature threshold 2 for a preset time 2 and then enters the long-term stable stage, calculate Δf according to the operation logic of the long-term stable stage.

[0154] Specifically, the energy-saving method for the refrigeration process of the air conditioner in the embodiment of the present application aims to improve the energy-saving rate and comfort level in the energy-saving mode when the existing variable-frequency air conditioner is turned on for a long time, as follows:

[0155] [1] When the working mode of the air conditioner is the refrigeration mode, perform the following frequency control process for the variable-frequency air conditioner:

[0156] [2] After the air conditioner receives the energy-saving mode instruction sent by the user and is turned on, it is default in the cooling stage 1, and the initial frequency of the corresponding compressor and the frequency upper limit value are determined according to the outdoor temperature.

[0157] [3] The air conditioner calculates the frequency increment Δf according to the difference between the indoor temperature and the set temperature according to the original variable-frequency control logic, and uses Δf to adjust the operating frequency of the compressor.

[0158] [4] If the indoor temperature reaches the set temperature and remains within the threshold 1 for a preset time 1, enter the temperature stable stage 2, and calculate the operating frequency of the compressor according to the operation logic of the temperature stable stage.

[0159] [5] If the indoor temperature of the air conditioner remains within the threshold 2 for a preset time 2, enter the long-term stable stage 3, and control the operating frequency of the compressor according to the operation logic of the long-term stable stage.

[0160] As Figure 12 shown, Figure 12 is the specific flowchart in the stable stage of the frequency control method provided by an embodiment of the present application. Specifically, the embodiment of the present application proposes a frequency control method for the temperature stable stage 2 and the long-term stable stage 3, as follows:

[0161] [1] Obtain the set temperature in the refrigeration mode and the indoor temperature-time curve in the recent n sampling periods.

[0162] [2] When the current operating stage is the temperature stable stage 2, calculate the frequency increment Δf 1 according to the difference between the current indoor temperature and the set temperature with an accuracy of 0.5°C according to the normal variable-frequency control logic. Specifically, when the difference between the indoor temperature and the set temperature is greater than 0.5°C, if the indoor temperature is greater than the set temperature, the increment Δf 1 >0, and the compressor increases the frequency at this time; otherwise, it decreases the frequency.

[0163] [3]Based on the indoor temperature-time curve within the recent n sampling periods, the trend of temperature change is judged with an accuracy of 0.1 °C. If the temperature shows an upward or downward trend, the fine-tuning increment Δf is determined according to the outdoor temperature magnitude 3 , which is used to finely adjust the compression frequency.

[0164] Specifically, when the indoor temperature shows an upward or downward trend within n sampling periods, the outdoor temperature of the nth sampling (or the current outdoor temperature) is judged to be in the normal temperature range 1 (for example, the outdoor temperature < 30 °C), the medium-high temperature range 2 (for example, (30 °C < outdoor temperature < 35 °C) or the high temperature range 3 (for example, 35 °C < outdoor temperature), etc., and different frequency increments Δf are given according to different ranges 3正常 、Δf 3中高温 and Δf 3高温 (For the upward trend, Δf 3高温上升 > Δf 3中高温上升 > Δf 3正常上升 > 0; for the downward trend, Δf 3高温下降 < Δf 3中高温下降 < Δf 3正常下降 < 0). If the temperature shows an upward trend and the current outdoor temperature is in the medium-high temperature range, the fine-tuning frequency Δf 3 = Δf 3中高温上升 > 0, causing the compressor frequency to increase by Δf 3中高温上升 HZ. Among them, the fine-tuning increments Δf 3 for the upward and downward trends in each temperature range are shown in Table 1 below:

[0165] Table 1

[0166]

[0167] [4]If the indoor temperature stabilizes within the preset temperature threshold 2 for the preset time 2, the operation stage changes to the long-term stable stage 3. At this time, on the basis of the logic of the temperature stable stage 2, the slow frequency reduction logic after stabilization and the frequency reduction adjustment amplitude logic are added.

[0168] [5]Specifically, the slow frequency reduction logic after stabilization is that: after every preset time 3, the operating frequency of the compressor is reduced by a small value Δf 4 , because if the air conditioner is turned on for a long time, due to the principle of the density difference between hot and cold air, cold air sinks and hot air rises, and the actual body feeling temperature of the user is lower than the set temperature of the air conditioner. At this time, reducing the frequency uses the convective heat transfer effect of the upper and lower air layers to keep the indoor temperature balanced and reduce unnecessary energy consumption. In addition, the frequency reduction adjustment amplitude logic is that: if the temperature is stable for a long time, the frequency increment Δf 1 calculated by the original variable frequency logic is reduced proportionally to reduce the temperature fluctuation after long-term stability, improve the temperature control accuracy and user comfort.

[0169] [6] Further, if the indoor temperature in the long-term stable stage 3 cannot be stabilized at the set temperature threshold 2, the operation stage returns to the temperature stable stage, and the influence of the suddenly occurring interference on the indoor temperature is reduced as soon as possible according to the operation logic of the temperature stable stage.

[0170] In a specific embodiment, the air conditioner is controlled according to the following control logic:

[0171] [1] When the user starts the air conditioner in the cooling mode, the air conditioner receives the set temperature instruction sent by the user and obtains the state parameters such as the current set temperature and indoor temperature of the air conditioner.

[0172] [2] When the air conditioner starts to operate, the operation stage is the cooling stage 1. At this time, the air conditioner determines the initial operating frequency and the maximum frequency of the compressor according to the outdoor temperature.

[0173] [3] If so, the operation stage is converted to the temperature stable stage 2, and it is judged whether the current indoor temperature is maintained within the set temperature threshold 1 for more than the preset time 1.

[0174] [4] If not, the frequency increment Δf is still calculated according to the original frequency control algorithm. And every once in a while, according to the indoor temperature-time curve of the previous n sampling periods, the temperature change trend is judged with an accuracy of 0.1 °C. If the temperature has an upward trend, a positive fine adjustment increment Δf is determined according to the outdoor temperature 3 >0; if it has a downward trend, a negative fine adjustment increment Δf is given 3 <0.

[0175] [5] If so, the operation stage is changed to the long-term stable stage 3. It is judged whether the indoor temperature in the long-term stable stage 3 is stable within the set temperature threshold 2.

[0176] [6] If so, the Δf calculated by the original frequency control algorithm 1 is reduced proportionally to Δf 2 =Δf 1 / a, where a is a proportionality coefficient that increases as the stable time becomes longer. In addition, on the basis of retaining the fine adjustment increment Δf 3 every preset time 4, the operating frequency is reduced by a small value Δf 4 .

[0177] [7] If not, the operation stage is changed to the temperature stable stage 2, and the air conditioner operates according to the temperature stable stage logic until the conditions for entering the long-term stable stage are met again.

[0178] Based on the frequency control methods of the above various embodiments, the following are respectively presented various embodiments of the controller, compressor, air conditioner, and computer-readable storage medium of the present application.

[0179] As Figure 13 shown, Figure 13 is a schematic structural diagram of a controller for executing the frequency control method provided by an embodiment of the present application. The controller 100 implemented in the present application includes: a processor 110, a memory 120, and a computer program stored on the memory 120 and executable on the processor 110. Among them, Figure 13 one processor 110 and one memory 120 are taken as examples.

[0180] The processor 110 and the memory 120 can be connected through a bus or other means, Figure 13 and taking connection through a bus as an example.

[0181] The memory 120, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory 120 can include high-speed random access memory, and can also include non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 120 optionally includes a memory 120 remotely set relative to the processor 110, and these remote memories 120 can be connected to the controller 100 through a network. Examples of the above network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network, and their combinations.

[0182] Those skilled in the art can understand that Figure 13 the device structure shown in

[0183] does not constitute a limitation on the controller 100, and may include more or fewer components than shown in the figure, or combine certain components, or different component arrangements. Figure 13 In the controller 100 shown in

[0184] the processor 110 can be used to call the frequency control program stored in the memory 120, so as to implement the above frequency control method. Specifically, the non-transitory software programs and instructions required to implement the frequency control method of the above embodiments are stored in the memory 120, and when executed by the processor 110, the frequency control method of the above embodiments is executed.

[0185] In addition, an embodiment of the present application further provides a compressor, including the controller of the above embodiment.

[0186] It should be noted that since the compressor of the embodiment of the present application includes the controller of the above embodiment, and the controller of the above embodiment can execute the frequency control method of any of the above embodiments, therefore, the specific implementation manners and technical effects of the compressor of the embodiment of the present application can refer to the specific implementation manners and technical effects of the frequency control method of any of the above embodiments.

[0187] In addition, an embodiment of the present application further provides an air conditioner, including the controller or the compressor of the above embodiment.

[0188] It should be noted that since the air conditioner of the embodiment of the present application includes the controller or the compressor of the above embodiment, and the controller of the above embodiment can execute the frequency control method of any of the above embodiments, therefore, the specific implementation manners and technical effects of the air conditioner of the embodiment of the present application can refer to the specific implementation manners and technical effects of the frequency control method of any of the above embodiments.

[0189] In addition, an embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions for executing the above frequency control method. Exemplarily, execute the Figures 1 to 12 method steps described above.

[0190] It should be noted that since the computer-readable storage medium of the embodiment of the present application can execute the frequency control method of any of the above embodiments, therefore, the specific implementation manners and technical effects of the computer-readable storage medium of the embodiment of the present application can refer to the specific implementation manners and technical effects of the frequency control method of any of the above embodiments.

[0191] Those of ordinary skill in the art will understand that all or some of the steps and systems disclosed in the above methods can be implemented as software, firmware, hardware, and their appropriate combinations. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or can be implemented as hardware, or can be implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0192] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the above embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

1. A frequency control method, characterized in that: include: Get the indoor temperature and the set temperature of the air conditioner; When the temperature difference between the indoor temperature and the set temperature is within a threshold range within a preset time, it is determined that the air conditioner is in a stable operation stage; Determine a target frequency increment in the stable operation phase, and correct the frequency of the compressor according to the target frequency increment; wherein the target frequency increment is determined in one of the following ways: determining the target frequency increment according to the temperature difference between the indoor temperature and the set temperature, and determining the target frequency increment according to the changing trend of the indoor temperature.

2. The frequency control method according to claim 1, characterized in that: Before determining that the air conditioner is in a stable operation stage, the frequency control method further includes: receiving a cooling instruction, and determining that the air conditioner enters a cooling stage according to the cooling instruction; For the temperature reduction stage, a first outdoor temperature is obtained, and an initial operating frequency and a maximum operating frequency of the compressor are determined according to the first outdoor temperature.

3. The frequency control method according to claim 1, characterized in that: The stable operation stage includes one of the following: a temperature stabilization stage, wherein the temperature difference corresponding to the temperature stabilization stage is within a first threshold range within a first preset time; A long-term stable stage, wherein the temperature difference corresponding to the long-term stable stage is within a second threshold range within a second preset time, the second preset time is greater than the first preset time, and the second threshold range is less than or equal to the first threshold range.

4. The frequency control method according to claim 3, characterized in that: The step of determining the target frequency increment according to the temperature difference between the indoor temperature and the set temperature comprises: In the case where the stable operation stage is a temperature stable stage, when the temperature difference between the indoor temperature and the set temperature is greater than a first preset value, determining a first frequency increment according to the indoor temperature and the set temperature; The first frequency increment is used as the target frequency increment.

5. The frequency control method according to claim 3, characterized in that: The step of determining the target frequency increment according to the temperature difference between the indoor temperature and the set temperature comprises: In the case where the stable operation stage is a long-term stable stage, when the temperature difference between the indoor temperature and the set temperature is greater than a first preset value, determining a first frequency increment according to the indoor temperature and the set temperature; A second frequency increment is obtained based on the first frequency increment and a preset down-adjustment parameter, and the second frequency increment is used as a target frequency increment.

6. The frequency control method according to claim 4 or 5, characterized in that: The determining the first frequency increment according to the indoor temperature and the set temperature comprises one of the following: When the indoor temperature is greater than the set temperature, determining that the first frequency increment is a positive number; When the indoor temperature is lower than the set temperature, the first frequency increment is determined to be a negative number.

7. The frequency control method according to claim 5, characterized in that: The relationship between the preset down-adjustment parameter and time is a positive correlation.

8. The frequency control method according to claim 3, characterized in that: The step of determining the target frequency increment according to the change trend of the indoor temperature includes: Acquire the temperature change value of the indoor temperature within a preset sampling period and the second outdoor temperature; A third frequency increment is determined according to the temperature change value and the second outdoor temperature, and the third frequency increment is used as a target frequency increment.

9. The frequency control method according to claim 8, characterized in that: The determining of the third frequency increment according to the temperature change value and the second outdoor temperature comprises one of the following: When the temperature change value is greater than zero, a corresponding target temperature interval is determined according to the second outdoor temperature, wherein the target temperature interval is one of a plurality of preset temperature intervals, each of the preset temperature intervals is provided with a first preset increment having a positive value, and the first preset increment corresponding to the target temperature interval is used as the third frequency increment; When the temperature change value is less than zero, the corresponding target temperature interval is determined according to the second outdoor temperature, wherein the target temperature interval is one of a plurality of preset temperature intervals, each of the preset temperature intervals is provided with a second preset increment having a negative value, and the second preset increment corresponding to the target temperature interval is used as the third frequency increment.

10. The frequency control method according to claim 9, characterized in that: The frequency control method further comprises: The relationship between the preset temperature interval and the first preset increment is a positive correlation; The relationship between the preset temperature interval and the second preset increment is a negative correlation.

11. The frequency control method according to claim 3, characterized in that: The frequency control method further comprises: In a case where the stable operation stage is a long-term stable stage, the frequency of the compressor is controlled to be reduced by a fourth frequency increment after every preset time period.

12. A controller, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the frequency control method according to any one of claims 1 to 11 when executing the computer program.

13. A compressor, characterized in that: Comprising a controller as claimed in claim 12.

14. An air conditioner, characterized in that: Comprising the controller as claimed in claim 12 or the compressor as claimed in claim 13.

15. A computer-readable storage medium, characterized in that: Computer executable instructions are stored, and the computer executable instructions are used to execute the frequency control method according to any one of claims 1 to 11.

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