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

Abstract

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 indoor temperature is lowered to the preset temperature and the lowering speed of the indoor temperature is larger than a first threshold value, it is determined that the compressor enters a frequency lowering stage; and for the frequency reduction stage, the coarse adjustment increment is determined according to the first temperature difference value of the indoor temperature and the set temperature, the fine adjustment increment is determined according to the temperature change trend of the indoor temperature, and the frequency of the compressor is corrected according to the coarse adjustment increment and the fine adjustment increment. Due to the fact that the compressor frequency can be roughly adjusted according to the temperature difference value of the indoor temperature and the set temperature and can be finely adjusted according to the change trend of the indoor temperature when the indoor temperature drops fast, the problem of temperature overshoot of the air conditioner in the cooling period is solved, and the temperature control precision is improved; and the compressor can be prevented from being too high, so that the system energy consumption can be continuously optimized, and the energy-saving effect is improved.

Description

Technical Field

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

[0002] In the related art, after the current air conditioner is turned on in the cooling mode, it usually runs at the maximum frequency for a period of time first, and then corrects the operating frequency of the compressor based on the user-set temperature and the indoor temperature. This method quickly reduces the indoor temperature at the beginning stage by running at the maximum frequency, and then corrects the frequency using the temperature difference between the indoor temperature and the set temperature, so as to achieve the purpose of quickly cooling down and stabilizing at the set temperature.

[0003] However, the above control method will have the problem of temperature overshoot in the specific implementation process, which is as follows: when the air conditioner starts running at the maximum frequency for a period of time, the indoor temperature has reached or approached the set temperature, and the air conditioner frequency is at a high frequency at this time. And when the indoor temperature is greater than or equal to the set temperature, the air conditioner will run at a high frequency for a period of time and then slowly drop to the frequency adapted to the indoor cooling load. In the transition stage where the air conditioner frequency slowly drops to the frequency adapted to the indoor cooling load, the temperature will inevitably overshoot and the adjustment time is relatively long, resulting in discomfort for users and increasing unnecessary energy consumption, which does not meet the requirements of comfort and energy conservation. 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 temperature control accuracy and energy-saving effect of the air conditioner, reduce the temperature overshoot problem, and improve the user experience.

[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 indoor temperature drops to a preset temperature and the dropping speed of the indoor temperature is greater than a first threshold, determine that the compressor enters the frequency reduction stage;

[0008] For the frequency reduction stage, determine a coarse adjustment increment according to a first temperature difference between the indoor temperature and the set temperature, determine a fine adjustment increment according to the temperature change trend of the indoor temperature, and correct the frequency of the compressor according to the coarse adjustment increment and the fine adjustment increment.

[0009] According to some embodiments of the present application, before determining that the compressor enters the frequency reduction 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, control the compressor to operate at the maximum operating frequency for a first preset time;

[0012] After the first preset time, when the indoor temperature is greater than the set temperature, determine a frequency increment according to a second temperature difference between the indoor temperature and the set temperature, and adjust the frequency of the compressor based on the frequency increment.

[0013] According to some embodiments of the present application, determining a coarse adjustment increment according to a first temperature difference between the indoor temperature and the set temperature includes one of the following:

[0014] When the first temperature difference between the indoor temperature and the set temperature is greater than a preset temperature difference threshold, determine that the coarse adjustment increment is a first positive increment, where the preset temperature difference threshold is greater than or equal to zero;

[0015] When the first temperature difference between the indoor temperature and the set temperature is less than or equal to the preset temperature difference threshold, determine that the coarse adjustment increment is a first negative increment.

[0016] According to some embodiments of the present application, determining a fine adjustment increment according to a temperature change trend of the indoor temperature includes:

[0017] After every second preset time interval, determine a fine adjustment increment according to the temperature change trend of the indoor temperature.

[0018] According to some embodiments of the present application, determining a fine adjustment increment according to a temperature change trend of the indoor temperature includes one of the following:

[0019] When the temperature change trend of the indoor temperature is an upward trend, determine that the fine adjustment increment is a second positive increment;

[0020] When the temperature change trend of the indoor temperature is a downward trend, determine that the fine adjustment increment is a second negative increment;

[0021] When the temperature change trend of the indoor temperature is a stable trend, determine that the fine adjustment increment is zero.

[0022] According to some embodiments of the present application, the temperature change trend of the indoor temperature is obtained through the following steps:

[0023] Obtain the indoor temperature within a plurality of consecutive sampling periods;

[0024] For each of the sampling periods, determine a third temperature difference between the indoor temperature of the current sampling period and the indoor temperature of the previous sampling period;

[0025] When the third temperature differences corresponding to a target number of consecutive sampling periods are all negative, determine that the temperature change trend of the indoor temperature is a downward trend;

[0026] When the third temperature differences corresponding to a target number of consecutive sampling periods are all positive, determine that the temperature change trend of the indoor temperature is an upward trend.

[0027] According to some embodiments of the present application, the second positive increment is equal to the absolute value of the second negative increment, and the absolute values of the second positive increment and the second negative increment are both preset frequency constants.

[0028] According to some embodiments of the present application, the correcting the frequency of the compressor according to the coarse adjustment increment and the fine adjustment increment includes:

[0029] Obtain the outdoor temperature;

[0030] Determine a fine adjustment gain coefficient according to the outdoor temperature, wherein there is a positive correlation between the outdoor temperature and the fine adjustment gain coefficient;

[0031] Correct the frequency of the compressor according to the coarse adjustment increment, the fine adjustment increment and the fine adjustment gain coefficient.

[0032] According to some embodiments of the present application, the correcting the frequency of the compressor according to the coarse adjustment increment, the fine adjustment increment and the fine adjustment gain coefficient includes:

[0033] Input the coarse adjustment increment, the fine adjustment increment and the fine adjustment gain coefficient into a frequency correction model to obtain the target frequency of the compressor;

[0034] Wherein, the frequency correction model includes a first input variable, a second input variable and a product value variable, wherein the first input variable is used to be assigned the frequency of the compressor before correction, the second input variable is used to be assigned the coarse adjustment increment, the product value variable is the product of a third input variable and a fourth input variable, the third input variable is used to be assigned the fine adjustment gain coefficient, the fourth input variable is used to be assigned the fine adjustment increment, and the sum of the first input variable, the second input variable and the product value variable is the target frequency of the compressor.

[0035] According to some embodiments of the present application, the frequency control method further includes:

[0036] In the frequency reduction stage, when the indoor temperature remains within the threshold range within the third preset time, control the compressor to exit the frequency reduction stage, where the set temperature is within the threshold range.

[0037] 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. When the processor runs the computer program, it executes the frequency control method as described in the first aspect above.

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

[0039] 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.

[0040] 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.

[0041] According to the technical solution of the embodiment of the present application, it has at least the following beneficial effects: First, the embodiment of the present application will obtain the indoor temperature and the set temperature of the air conditioner; then, when the indoor temperature drops to the preset temperature and the drop rate of the indoor temperature is greater than the first threshold, the embodiment of the present application will determine that the compressor enters the frequency reduction stage; then, for the frequency reduction stage, the embodiment of the present application will determine the coarse adjustment increment according to the first temperature difference between the indoor temperature and the set temperature, determine the fine adjustment increment according to the temperature change trend of the indoor temperature, and correct the frequency of the compressor according to the coarse adjustment increment and the fine adjustment increment. Since the embodiment of the present application can trigger the compressor to enter the frequency reduction stage according to the drop state of the indoor temperature, and can coarsely adjust the compressor frequency according to the temperature difference between the indoor temperature and the set temperature during the frequency reduction stage, and can also finely adjust the compressor frequency according to the change trend of the indoor temperature, thereby reducing the problem of temperature overshoot of the air conditioner during cooling; and can also avoid the compressor from being too high, so as to continuously optimize the system energy consumption. Therefore, the embodiment of the present application can improve the energy-saving effect and temperature control accuracy of the air conditioner, and further improve the user's comfort.

[0042] The additional aspects and advantages of the present application will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present application. Description of the Drawings

[0043] The accompanying drawings are used to provide a further understanding of the technical solutions 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 solutions of the present application, and do not constitute a limitation to the technical solutions of the present application.

[0044] Figure 1 It is a flowchart of a frequency control method provided by an embodiment of the present application;

[0045] Figure 2 It is a flowchart of a frequency control method provided by another embodiment of the present application;

[0046] Figure 3 It is a flowchart of a frequency control method provided by another embodiment of the present application;

[0047] Figure 4 It is a flowchart of a frequency control method provided by another embodiment of the present application;

[0048] Figure 5 It is a flowchart of a frequency control method provided by another embodiment of the present application;

[0049] Figure 6 It is a flowchart of a frequency control method provided by another embodiment of the present application;

[0050] Figure 7 It is a flowchart of a frequency control method provided by another embodiment of the present application;

[0051] Figure 8 It is a flowchart of a frequency control method provided by another embodiment of the present application;

[0052] Figure 9 It is a flowchart of a frequency control method provided by another embodiment of the present application;

[0053] Figure 10 It is a flowchart of a frequency control method provided by another embodiment of the present application;

[0054] Figure 11 It is a flowchart of a frequency control method provided by another embodiment of the present application;

[0055] Figure 12 It is a flowchart of a frequency control method provided by another embodiment of the present application;

[0056] Figure 13 It is an overall flowchart of a frequency control method after startup provided by an embodiment of the present application;

[0057] Figure 14 It is a specific flowchart of a frequency control method in the fast frequency reduction stage provided by an embodiment of the present application;

[0058] Figure 15 It is a specific flowchart of the frequency control method provided in an embodiment of the present application after startup;

[0059] Figure 16 It is a schematic diagram of a controller for executing the frequency control method provided in an embodiment of the present application. Detailed implementation manners

[0060] 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 with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0061] 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 therefore should not be construed as a limitation to the present application.

[0062] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed 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.

[0063] In the description of the present application, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.

[0064] In some cases, after the current air conditioner is turned on in the cooling mode, it usually runs at the maximum frequency for a period of time first, and then corrects the operating frequency of the compressor based on the user-set temperature and the indoor temperature. This method quickly reduces the indoor temperature at the beginning stage by running at the maximum frequency, and then corrects the frequency using the temperature difference between the indoor temperature and the set temperature, so as to achieve the purpose of quickly cooling down and stabilizing at the set temperature.

[0065] However, in the specific implementation process of the above control method, there will be a problem of temperature overshoot, which is as follows: When the air conditioner starts running at the maximum frequency for a period of time, the indoor temperature has reached or is close to the set temperature. At this time, the frequency of the air conditioner is at a high frequency. And when the indoor temperature is greater than or equal to the set temperature, the air conditioner will run at a high frequency for a period of time and then slowly decrease to a frequency adapted to the indoor cooling load. In the transition stage when the air conditioner frequency slowly decreases to adapt to the indoor cooling load, the temperature inevitably overshoots and the adjustment time is relatively long, resulting in discomfort for users, increasing unnecessary energy consumption, and not meeting the requirements of comfort and energy conservation.

[0066] All in all, there is a problem that in the transition process of an existing variable-frequency air conditioner from quickly cooling down to temperature stability, it is difficult to simultaneously meet the control objectives of temperature control rapidity and accuracy, which in turn leads to discomfort for users. The reason is that when the indoor temperature is close to the set temperature, the frequency cannot be quickly reduced to adapt to the cooling load.

[0067] 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 temperature control accuracy and energy-saving effect of the air conditioner, reduce the temperature overshoot problem, and improve the user experience.

[0068] Next, in combination with the accompanying drawings, various embodiments of the frequency control method of the present application will be further elaborated.

[0069] As Figure 1 shown, Figure 1 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, and S130.

[0070] Step S110: Obtain the indoor temperature and the set temperature of the air conditioner;

[0071] Step S120: When the indoor temperature drops to a preset temperature and the dropping speed of the indoor temperature is greater than a first threshold, determine that the compressor enters the frequency reduction stage;

[0072] Step S130: For the frequency reduction stage, determine a coarse adjustment increment according to the first temperature difference between the indoor temperature and the set temperature, determine a fine adjustment increment according to the temperature change trend of the indoor temperature, and correct the frequency of the compressor according to the coarse adjustment increment and the fine adjustment increment.

[0073] 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 compare the indoor temperature with the preset temperature. If the indoor temperature drops to within the preset temperature and the dropping speed of the indoor temperature exceeds the first threshold, it indicates that the indoor temperature has dropped to near the set temperature and will continue to drop rapidly at the current dropping speed. At this time, the compressor can be quickly down-regulated, that is, the compressor is controlled to enter the quick down-regulation stage; then, in the quick down-regulation stage, the embodiment of the present application will calculate the rough adjustment increment and the fine adjustment increment respectively from two aspects. Among them, the rough adjustment increment can be calculated from the first temperature difference between the indoor temperature and the set temperature, and the fine adjustment increment can be calculated from the temperature change trend of the indoor temperature; finally, the embodiment of the present application will use the above-mentioned rough adjustment increment and fine adjustment increment to correct the operating frequency of the compressor to reduce the operating frequency of the compressor, avoid the temperature being too low, and at the same time improve the energy-saving effect.

[0074] It can be understood that regarding the above-mentioned 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 specifically limit the method for obtaining the indoor temperature.

[0075] In addition, it can be understood that regarding the above-mentioned 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 specifically limit the setting method of the set temperature.

[0076] It should be noted that the relationship between the above-mentioned preset temperature and the set temperature can be as follows: the absolute value of the difference between the preset temperature and the set temperature is less than or equal to the preset value; specifically, the preset temperature can be slightly higher than the set temperature, or the preset temperature can be slightly lower than the set temperature, or the preset temperature can be equal to the set temperature.

[0077] It can be understood that regarding the above-mentioned preset temperature, it can be set based on the set temperature. The preset temperature can be 2°C higher than the set temperature, or 2°C lower than the set temperature, or equal to the set temperature, or other temperature values. The embodiment of the present application does not specifically limit the value of the above-mentioned preset temperature.

[0078] It should be noted that regarding the method for obtaining the dropping speed of the above-mentioned indoor temperature, the embodiment of the present application can obtain the indoor temperature at multiple different sampling times, and calculate it based on the difference between multiple indoor temperatures and the duration between multiple sampling times.

[0079] It can be understood that the above-mentioned first threshold can be set by the system or the user. The first threshold can be a decrease of 0.5°C every 5 minutes, or a decrease of 0.5°C every 3 minutes, or other values. The embodiments of the present application do not make specific limitations on this.

[0080] 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, in the embodiments of the present application, the corresponding coarse adjustment increment can be obtained through this temperature difference, and the compressor frequency can be coarsely adjusted by using this coarse adjustment increment. In addition, since the change trend of the indoor temperature reflects the trend of the indoor temperature, therefore, in the embodiments of the present application, the corresponding fine adjustment increment can be obtained through the change trend, and the compressor frequency can be finely adjusted by using this fine adjustment increment.

[0081] It is worth noting that since the embodiments of the present application can trigger the compressor to enter the frequency reduction stage according to the decrease state of the indoor temperature, and can coarsely adjust the compressor frequency according to the temperature difference between the indoor temperature and the set temperature during the frequency reduction stage, and can also finely adjust the compressor frequency according to the change trend of the indoor temperature, thereby reducing the problem of temperature overshoot of the air conditioner during the cooling period; and can also avoid the compressor from being too high, so as to continuously optimize the system energy consumption. Therefore, the embodiments of the present application can improve the energy-saving effect and temperature control accuracy of the air conditioner, and thus improve the comfort of the user.

[0082] Among them, the adjustment time can refer to the shortest time required for the controlled variable to reach and remain within the error band of plus or minus 5% of the final value after the control system is affected by an input or disturbance. Taking the air conditioner as an example, it is the shortest time required for the air conditioner to reach the set temperature from the initial temperature and remain within a certain range of plus or minus of this temperature.

[0083] 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 executing the above step S120, this frequency control method may further include but is not limited to steps S210, S220, and S230.

[0084] Step S210: Receive a refrigeration instruction, and determine that the air conditioner enters the cooling stage according to the refrigeration instruction;

[0085] Step S220: For the cooling stage, control the compressor to operate at the maximum operating frequency for a first preset time;

[0086] Step S230: After the first preset time, when the indoor temperature is greater than the set temperature, determine the frequency increment according to the second temperature difference between the indoor temperature and the set temperature, and adjust the frequency of the compressor based on the frequency increment.

[0087] In one embodiment, when the air conditioner receives a cooling instruction, it will start up in the cooling mode and enter the rapid cooling stage after startup. Since the difference between the indoor temperature and the set temperature at startup is relatively large, 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 for a first preset time. Then, after the compressor operates at the maximum operating frequency for the first preset time, the indoor temperature at this time is obtained and compared with the set temperature. If the indoor temperature is still greater than the set temperature at this time, then according to the second temperature difference between the indoor temperature and the set temperature, the frequency increment is calculated according to the normal variable frequency control logic, and the operating frequency of the compressor is adjusted using this frequency increment.

[0088] It should be noted that for the normal variable frequency control logic, when the second temperature difference is larger, the frequency increment is larger, so that the operating frequency of the compressor can be greatly increased; when the second temperature difference is smaller, the positive frequency increment is smaller, so that the operating frequency of the compressor can be slightly increased; that is, the relationship between the second temperature difference and the frequency increment is a positive correlation.

[0089] 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 the user can tell the air conditioner by voice, or it can be set by other means. The embodiments of the present application do not specifically limit the generation and acquisition methods of the cooling instruction.

[0090] In addition, it can be understood that regarding the above-mentioned first preset time, it can be set by the system or the user independently. The first preset time can be 30 minutes, or 20 minutes, or other durations. The embodiments of the present application do not specifically limit this.

[0091] In addition, it should be noted that regarding the determination of the coarse adjustment increment according to the first temperature difference between the indoor temperature and the set temperature in step S130 above, it may include but is not limited to Figure 3 or Figure 4 The following two implementation cases, specifically as follows:

[0092] 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 coarse adjustment increment according to the first temperature difference between the indoor temperature and the set temperature in step S130 above, it may include but is not limited to step S310 and step S320.

[0093] Step S310: When the first temperature difference between the indoor temperature and the set temperature is greater than the preset temperature difference threshold;

[0094] Step S320: Determine that the coarse adjustment increment is the first positive increment, where the preset temperature difference threshold is greater than or equal to zero.

[0095] As Figure 4 shown, Figure 4 FIG. is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the determination of the coarse adjustment increment according to the first 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.

[0096] Step S410: When the first temperature difference between the indoor temperature and the set temperature is less than or equal to the preset temperature difference threshold;

[0097] Step S420: Determine that the coarse adjustment increment is the first negative increment.

[0098] In one embodiment, based on Figure 3 and Figure 4 in the control method, if the first temperature difference between the indoor temperature and the set temperature is greater than the preset temperature difference threshold, it indicates that the indoor temperature is relatively high at this time. Then the coarse adjustment increment at this time is a positive number. By positively coarsely adjusting the operating frequency of the compressor, the operating frequency of the compressor is increased, thereby enhancing the refrigeration effect. On the contrary, if the first temperature difference between the indoor temperature and the set temperature is less than the preset temperature difference threshold, it indicates that the indoor temperature is close to or lower than the set temperature at this time. Then the coarse adjustment increment at this time is a negative number. By negatively coarsely adjusting the operating frequency of the compressor, the operating frequency of the compressor is reduced, thereby weakening the refrigeration effect.

[0099] It should be noted that regarding the above-mentioned preset temperature difference threshold, 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 coarse adjustment increment as the first positive increment will be triggered.

[0100] It can be understood that the value of the above-mentioned preset temperature difference threshold 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.

[0101] In addition, as Figure 5 shown, Figure 5 FIG. is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the determination of the fine adjustment increment according to the temperature change trend of the indoor temperature in step S130 above, it may include, but is not limited to, steps S510 and S520.

[0102] Step S510: Obtain the temperature change trend of the indoor temperature;

[0103] Step S520: After every second preset time interval, determine the fine adjustment increment according to the temperature change trend of the indoor temperature.

[0104] In one embodiment, when the air conditioner is in the fast frequency reduction stage, the embodiment of the present application obtains the indoor temperatures of multiple preset sampling periods and determines the temperature change trend of the indoor temperature based on the indoor temperatures of multiple preset sampling periods; then, after every second preset time interval, the embodiment of the present application calculates the corresponding fine adjustment increment based on the temperature change trend.

[0105] 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. The second preset time can be 5 minutes, 10 minutes, or other durations. The embodiment of the present application does not make specific limitations on this.

[0106] In addition, it should be noted that the determination of the fine adjustment increment according to the temperature change trend of the indoor temperature in the above-mentioned steps S130 and S520 may include but is not limited to Figures 6 to 8 the following three implementation cases, which are specifically as follows:

[0107] As Figure 6 shown, Figure 6 is a flowchart of a frequency control method provided by another embodiment of the present application. The determination of the fine adjustment increment according to the temperature change trend of the indoor temperature in the above-mentioned steps S130 and S520 may include but is not limited to steps S610 and S620.

[0108] Step S610: When the temperature change trend of the indoor temperature is an upward trend;

[0109] Step S620: Determine that the fine adjustment increment is the second positive increment.

[0110] As Figure 7 shown, Figure 7 is a flowchart of a frequency control method provided by another embodiment of the present application. The determination of the fine adjustment increment according to the temperature change trend of the indoor temperature in the above-mentioned steps S130 and S520 may include but is not limited to steps S710 and S720.

[0111] Step S710: When the temperature change trend of the indoor temperature is a downward trend;

[0112] Step S720: Determine that the fine adjustment increment is the second negative increment.

[0113] As Figure 8 shown, Figure 8It is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the determination of the fine adjustment increment according to the temperature change trend of the indoor temperature in step S130 and step S520 above, it may include but is not limited to steps S810 and S820.

[0114] Step S810: When the temperature change trend of the indoor temperature is a stable trend;

[0115] Step S820: Determine that the fine adjustment increment is zero.

[0116] In one embodiment, based on Figures 6 to 8 In the control method, if the temperature change trend of the indoor temperature is an upward trend, the embodiment of the present application will determine a positive fine adjustment increment, and by positively correcting the operating frequency of the compressor, the operating frequency of the compressor is increased, thereby enhancing the refrigeration effect. If the temperature change trend of the indoor temperature is a downward trend, the embodiment of the present application will determine a negative fine adjustment increment, and by negatively correcting the operating frequency of the compressor, the operating frequency of the compressor is reduced, thereby weakening the refrigeration effect. If the temperature change trend of the indoor temperature is a stable trend, the fine adjustment increment in the embodiment of the present application is zero.

[0117] In one embodiment, the second positive increment is equal to the absolute value of the second negative increment, and the absolute values of the second positive increment and the second negative increment are both preset frequency constants.

[0118] In addition, as Figure 9 shown, Figure 9 It is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the acquisition process of the temperature change trend of the indoor temperature, it may include but is not limited to steps S910, S920, S930, and S940.

[0119] Step S910: Obtain the indoor temperature within multiple consecutive sampling periods;

[0120] Step S920: For each sampling period, determine the third temperature difference between the indoor temperature of the current sampling period and the indoor temperature of the previous sampling period;

[0121] Step S930: When the third temperature differences corresponding to a continuous target number of sampling periods are all negative, determine that the temperature change trend of the indoor temperature is a downward trend;

[0122] Step S940: When the third temperature differences corresponding to a continuous target number of sampling periods are all positive, determine that the temperature change trend of the indoor temperature is an upward trend.

[0123] In one embodiment, in each sampling period, the current indoor temperature is first compared with the indoor temperature in the previous sampling period to check if there is an increase or a decrease. If the indoor temperature shows an increase or a decrease in a continuous number of target sampling periods, it is considered that the current indoor temperature is in an increasing or decreasing trend.

[0124] It can be understood that the above-mentioned number of targets can be set by the system or the user independently. This number of targets can be two, three, or other numbers, and the embodiments of the present application do not make specific limitations on this.

[0125] In addition, as Figure 10 shown, Figure 10 is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the correction of the frequency of the compressor according to the coarse adjustment increment and the fine adjustment increment in the above step S130, it may include but is not limited to steps S1010, S1020, and S1030.

[0126] Step S1010: Obtain the outdoor temperature;

[0127] Step S1020: Determine the fine adjustment gain coefficient according to the outdoor temperature, where there is a positive correlation between the outdoor temperature and the fine adjustment gain coefficient;

[0128] Step S1030: Correct the frequency of the compressor according to the coarse adjustment increment, the fine adjustment increment, and the fine adjustment gain coefficient.

[0129] In one embodiment, since the outdoor ambient temperature continuously radiates into the room, the indoor ambient temperature is affected by the outdoor ambient temperature. In this regard, the embodiments of the present application will also determine the corresponding fine adjustment gain coefficient based on the outdoor temperature, where the higher the outdoor temperature, the larger the fine adjustment gain coefficient, and the lower the outdoor temperature, the smaller the fine adjustment gain coefficient. Then, the embodiments of the present application will use the above-mentioned coarse adjustment increment, fine adjustment increment, and fine adjustment gain coefficient to correct the operating frequency of the compressor to reduce the operating frequency of the compressor, avoid too low temperature, and at the same time improve the energy-saving effect.

[0130] In addition, as Figure 11 shown, Figure 11 is a flowchart of a frequency control method provided by another embodiment of the present application. Regarding the above step S1030, it may include but is not limited to steps S1110 and S1120.

[0131] Step S1110: Input the coarse adjustment increment, the fine adjustment increment, and the fine adjustment gain coefficient into the frequency correction model;

[0132] Step S1120: Obtain the target frequency of the compressor. Among them, the frequency correction model includes a first input variable, a second input variable, and a product value variable. The first input variable is used to be assigned the compressor frequency before correction, the second input variable is used to be assigned the coarse adjustment increment, the product value variable is the product of a third input variable and a fourth input variable, the third input variable is used to be assigned the fine adjustment gain coefficient, the fourth input variable is used to be assigned the fine adjustment increment, and the sum of the first input variable, the second input variable, and the product value variable is the target frequency of the compressor.

[0133] In one embodiment, the embodiment of the present application can calculate the target frequency of the compressor through the following formula: f i+1 = f i + Δf + λΔf′, where f i+1 is the target frequency of the compressor, f i is the compressor frequency before correction, Δf is the coarse adjustment increment, λ is the fine adjustment gain coefficient, and Δf′ is the fine adjustment increment.

[0134] In addition, as Figure 12 shown, Figure 12 is the flowchart of the 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 S1210 and step S1220.

[0135] Step S1210: In the frequency reduction stage, determine that the indoor temperature is within the threshold range within the third preset time, where the set temperature is within the threshold range;

[0136] Step S1220: Control the compressor to exit the frequency reduction stage.

[0137] In one embodiment, after the air conditioner operates for the third preset time in the frequency reduction stage, if the indoor temperature remains within a certain threshold range of the set temperature, it exits the rapid frequency reduction stage and operates according to the normal variable frequency control logic.

[0138] 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.

[0139] As Figure 13 shown, Figure 13 is the overall flowchart of the frequency control method provided by an embodiment of the present application after startup; the overall process may include, but is not limited to, step S1310, step S1320, step S1330, and step S1340.

[0140] Step S1310: When the air conditioner starts in the cooling mode and is in the rapid cooling stage 1, operate at the maximum compressor frequency for the preset time 1;

[0141] Step S1320: If the indoor temperature is still greater than the set temperature, calculate the frequency increment Δf according to the difference between the indoor temperature and the set temperature according to the normal variable-frequency control logic.

[0142] Step S1330: If the indoor temperature reaches the set temperature and the temperature drop rate is higher than threshold 1, enter the rapid frequency reduction stage, and calculate the frequency increment Δf according to the frequency reduction control logic.

[0143] Step S1340: If after the rapid frequency reduction stage runs for the preset time 3, the indoor temperature remains within a certain threshold range of the set temperature, exit the rapid frequency reduction stage 2 and operate according to the normal variable-frequency logic.

[0144] Specifically, the embodiment of the present application proposes a frequency control method for the refrigeration transition stage, aiming to solve the problem of temperature overshoot in the transition process from rapid cooling to temperature stabilization of the existing variable-frequency air conditioner. The specific content is as follows:

[0145] [1] When the working mode of the air conditioner is the refrigeration mode, execute the following variable-frequency air conditioner frequency control process:

[0146] [2] After the air conditioner receives the user's refrigeration mode instruction and is turned on, it is default in the rapid cooling stage 1 and runs at the maximum compressor frequency for the preset time 1.

[0147] [3] After running for the preset time 1, if the indoor temperature is still greater than the set temperature, calculate the frequency increment Δf according to the difference between the indoor temperature and the set temperature according to the normal variable-frequency control logic, and use Δf to adjust the compressor operating frequency.

[0148] [4] If the indoor temperature reaches the set temperature and the temperature drop rate is higher than threshold 1, enter the rapid frequency reduction stage 2, and calculate the frequency increment Δf of the operating frequency according to the difference between the indoor temperature and the set temperature according to the frequency reduction control logic.

[0149] [5] If after the preset time 3 of the air conditioner, the indoor temperature remains within a certain threshold range of the set temperature, exit the rapid frequency reduction stage 2 and operate according to the normal variable-frequency control logic.

[0150] In addition, the frequency control method in the rapid frequency reduction stage can be as Figure 14 shown, and its specific steps are as follows:

[0151] [1] Obtain the set temperature, outdoor temperature, and indoor temperature-time curve in the past n sampling periods in the refrigeration mode.

[0152] [2] According to the difference between the current indoor temperature and the set temperature, calculate the frequency increment Δf with an accuracy of 0.5 °C according to the cooling capacity control logic.

[0153] [3]Specifically, the above-mentioned cooling capacity control logic is used to perform frequency reduction when the indoor temperature is equal to or slightly higher than the set temperature, i.e., Δf < 0; when the indoor temperature is lower than the set temperature by a certain threshold, frequency increase is performed, i.e., Δf > 0.

[0154] [4]After every preset time interval of 2, 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 adjustment increment Δf′ is calculated, and the operation frequency of the compressor is finely adjusted using Δf′.

[0155] [5]Specifically, the logic of the above-mentioned trend judgment method lies in that in each sampling period, it is first judged whether the current indoor temperature has increased or decreased compared with the temperature in the previous sampling period. If the indoor temperature has increased or decreased in consecutive n sampling periods, it is considered that the current indoor temperature is in an upward or downward trend.

[0156] [6]Furthermore, if the indoor temperature has an upward trend, the frequency fine adjustment increment Δf′ = +f 0 ; if the indoor temperature has a downward trend, the fine adjustment increment Δf′ = -f 0 ; if the temperature remains unchanged, then Δf′ = 0; where f 0 is a preset frequency constant.

[0157] [7]The corrected operation frequency is obtained based on the cooling capacity increment and the fine adjustment increment: the frequency correction calculation formula is f i+1 = f i + Δf + λΔf′, where λ is the fine adjustment gain coefficient, and its value is related to the outdoor temperature. The higher the outdoor temperature, the larger this coefficient is.

[0158] In a specific embodiment, the air conditioner is controlled according to the control logic as follows Figure 15 shown.

[0159] [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 status parameters such as the current set temperature, indoor temperature, and outdoor temperature of the air conditioner.

[0160] [2]When the air conditioner starts running, the operation stage is the rapid cooling stage 1, and at this time, the air conditioner runs at the maximum cooling frequency.

[0161] [3] Determine whether the maximum frequency operation time is greater than the preset time 1 or the current indoor temperature is less than the set temperature. If so, control according to the normal frequency control logic. If not, continue to operate at the maximum frequency. Specifically, the normal frequency control logic calculates the operation frequency increment Δf based on the difference between the indoor temperature and the set temperature and the change of the difference, and uses this frequency increment to correct the operation frequency. For example, when the indoor temperature is greater than the set temperature, the frequency is reduced; when the indoor temperature is less than the set temperature, the frequency is also reduced.

[0162] [4] If the indoor temperature reaches the set temperature and the temperature drop rate is higher than the threshold 1, enter the fast frequency reduction stage 2, and correct the operation frequency of the compressor according to the frequency reduction control logic.

[0163] [5] When the operation stage is in the fast frequency reduction 2, determine whether the operation time of this stage is greater than the preset time 3 and the temperature remains within a certain threshold range of the set temperature. If so, exit the fast frequency reduction stage and operate according to the normal variable frequency control logic.

[0164] [6] If not, calculate the frequency reduction increment Δf according to the difference between the indoor temperature and the set temperature according to the capacity reduction control logic. Specifically, as a rough adjustment means, the capacity reduction control logic calculates Δf with an accuracy of 0.5 °C, aiming to suppress temperature overshoot through the frequency reduction logic when the set temperature is equal to the indoor temperature.

[0165] [7] After every preset time 2, judge the trend of temperature change with an accuracy of 0.1 °C at a time. If the temperature shows an upward or downward trend, calculate the fine adjustment increment Δf′, and use Δf′ to finely adjust the operation frequency of the compressor. Specifically, the fine adjustment increment increases the frequency when the temperature shows an upward trend and decreases the frequency when the temperature shows a downward trend, aiming to further maintain the stability of the indoor temperature through fine adjustment.

[0166] [8] According to the frequency correction calculation formula f i+1 = f i +Δf + λΔf′ to calculate the corrected operation frequency and operate at this frequency. Where λ is the fine adjustment gain coefficient, and its value is related to the outdoor temperature. The higher the outdoor temperature, the larger this coefficient.

[0167] Based on the frequency control methods of the above various embodiments, the following respectively present various embodiments of the controller, compressor, air conditioner and computer-readable storage medium of the present application.

[0168] As Figure 16 shown, Figure 16It is a schematic structural diagram of a controller for implementing a 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 16 One processor 110 and one memory 120 are taken as examples.

[0169] The processor 110 and the memory 120 can be connected through a bus or other means, Figure 16 Taking the connection through a bus as an example.

[0170] 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 magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 120 may optionally include a memory 120 remotely provided with respect to the processor 110, and these remote memories 120 can be connected to the controller 100 through a network. Examples of the above-mentioned network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0171] Those skilled in the art can understand that, Figure 16 the device structure shown does not constitute a limitation on the controller 100, and may include more or fewer components than shown in the figure, or combine some components, or have different component arrangements.

[0172] In Figure 16 In the controller 100 shown, the processor 110 can be used to call the frequency control program stored in the memory 120, so as to implement the above-mentioned frequency control method. Specifically, the non-transitory software program and instructions required to implement the frequency control method of the above embodiment are stored in the memory 120, and when executed by the processor 110, the frequency control method of the above embodiment is executed.

[0173] It should be noted that since the controller 100 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 controller 100 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.

[0174] In addition, an embodiment of the present application further provides a compressor, including the controller of the above embodiment.

[0175] 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.

[0176] In addition, an embodiment of the present application further provides an air conditioner, which includes the controller or the compressor of the above embodiment.

[0177] 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.

[0178] 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 15 method steps described above.

[0179] 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.

[0180] Those of ordinary skill in the art will understand that all or some of the steps and systems disclosed above 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 include, but are 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, it is well known to those of ordinary skill in the art that communication media typically include 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.

[0181] The above is a specific description of the preferred embodiments 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. 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 indoor temperature drops to a preset temperature and the drop rate of the indoor temperature is greater than a first threshold, it is determined that the compressor enters a frequency reduction stage; For the frequency reduction stage, a coarse adjustment increment is determined according to a first temperature difference between the indoor temperature and the set temperature, a fine adjustment increment is determined according to a temperature change trend of the indoor temperature, and the frequency of the compressor is corrected according to the coarse adjustment increment and the fine adjustment increment.

2. The frequency control method according to claim 1, characterized in that: Before determining that the compressor enters the frequency reduction 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; During the cooling stage, the compressor is controlled to operate at a maximum operating frequency for a first preset time; After the first preset time, when the indoor temperature is greater than the set temperature, a frequency increment is determined according to a second temperature difference between the indoor temperature and the set temperature, and the frequency of the compressor is adjusted based on the frequency increment.

3. The frequency control method according to claim 1, characterized in that: The determining of the coarse adjustment increment according to the first temperature difference between the indoor temperature and the set temperature comprises one of the following: When a first temperature difference between the indoor temperature and the set temperature is greater than a preset temperature difference threshold, determining the coarse adjustment increment to be a first positive increment, wherein the preset temperature difference threshold is greater than or equal to zero; When a first temperature difference between the indoor temperature and the set temperature is less than or equal to the preset temperature difference threshold, the coarse adjustment increment is determined to be a first negative increment.

4. The frequency control method according to claim 1, characterized in that: The step of determining the fine adjustment increment according to the temperature change trend of the indoor temperature includes: After each second preset time interval, a fine adjustment increment is determined according to the temperature change trend of the indoor temperature.

5. The frequency control method according to claim 1 or 4, characterized in that: The step of determining the fine adjustment increment according to the temperature change trend of the indoor temperature includes one of the following: When the temperature change trend of the indoor temperature is an upward trend, determining the fine adjustment increment to be a second positive increment; When the temperature change trend of the indoor temperature is a downward trend, determining the fine adjustment increment to be a second negative increment; When the temperature change trend of the indoor temperature is a stable trend, the fine adjustment increment is determined to be zero.

6. The frequency control method according to claim 5, characterized in that: The temperature variation trend of the indoor temperature is obtained by the following steps: Acquiring the indoor temperature within a plurality of consecutive sampling periods; For each of the sampling cycles, determining a third temperature difference between the indoor temperature of the current sampling cycle and the indoor temperature of the previous sampling cycle; When the third temperature difference values ​​corresponding to the consecutive target number of sampling periods are all negative numbers, it is determined that the temperature change trend of the indoor temperature is a downward trend; When the third temperature difference values ​​corresponding to the continuous target number of sampling periods are all positive numbers, it is determined that the temperature change trend of the indoor temperature is an upward trend.

7. The frequency control method according to claim 5, characterized in that: The second positive increment is equal to the absolute value of the second negative increment, and the absolute values ​​of the second positive increment and the second negative increment are both preset frequency constants.

8. The frequency control method according to claim 1, characterized in that: The correcting the frequency of the compressor according to the coarse adjustment increment and the fine adjustment increment comprises: Get the outdoor temperature; Determining a fine adjustment gain coefficient according to the outdoor temperature, wherein there is a positive correlation between the outdoor temperature and the fine adjustment gain coefficient; The frequency of the compressor is corrected according to the coarse adjustment increment, the fine adjustment increment and the fine adjustment gain coefficient.

9. The frequency control method according to claim 8, characterized in that: The correcting the frequency of the compressor according to the coarse adjustment increment, the fine adjustment increment and the fine adjustment gain coefficient comprises: Inputting the coarse adjustment increment, the fine adjustment increment and the fine adjustment gain coefficient into a frequency correction model to obtain a target frequency of the compressor; The frequency correction model includes a first input variable, a second input variable and a product value variable, wherein the first input variable is used to be assigned the compressor frequency before correction, the second input variable is used to be assigned the coarse adjustment increment, the product value variable is the product of the third input variable and the fourth input variable, the third input variable is used to be assigned the fine adjustment gain coefficient, the fourth input variable is used to be assigned the fine adjustment increment, and the sum of the first input variable, the second input variable and the product value variable is the target frequency of the compressor.

10. The frequency control method according to claim 1, characterized in that: The frequency control method further comprises: In the frequency reduction stage, when the indoor temperature is within a threshold range within a third preset time, the compressor is controlled to exit the frequency reduction stage, wherein the set temperature is within the threshold range.

11. 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 10 when executing the computer program.

12. A compressor, characterized in that: Comprising a controller as claimed in claim 11.

13. An air conditioner, characterized in that: Comprising the controller as claimed in claim 11 or the compressor as claimed in claim 12.

14. 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 10.

Images