Refrigerator and compressor rotating speed control method thereof

Abstract

According to the refrigerator and the compressor rotating speed control method thereof, the opening parameters of a refrigerator door are detected and analyzed, user behaviors are accurately judged, the operation time periods of the refrigerator are reasonably divided, and the rotating speed of the compressor is specifically adjusted in different time periods, so that the temperature in the refrigerator is rapidly recovered to the proper storage temperature, and the refrigerator is more intelligent. According to the refrigerator, the refrigerating efficiency of the refrigerator can be improved, the freshness of food can be better kept, energy consumption can be effectively reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the field of refrigerators, and particularly to a refrigerator and a method for controlling the rotational speed of its compressor. Background Art

[0002] In today's household life, as a key appliance for food storage, the performance and intelligence level of a refrigerator have an important impact on the quality of users' lives. With the acceleration of people's living rhythms and the diversification of their lifestyles, the usage patterns of users for refrigerators have become more complex and diverse. Most traditional refrigerator operating modes adopt fixed parameter settings, and the compressor operates at a constant rotational speed, lacking the ability to perceive and adapt to the actual usage behaviors of users. However, in actual use, the frequencies and durations of users opening the refrigerator door vary greatly. In order to meet users' higher demands for food preservation and energy conservation, in recent years, some refrigerators have begun to attempt to have certain intelligent control functions. However, most of the existing intelligent refrigerator control technologies simply adjust the operation of the compressor according to the feedback of temperature sensors, and do not analyze and utilize user behaviors deeply enough, unable to comprehensively and accurately judge users' usage habits and the actual usage status of the refrigerator, making it difficult for the temperature inside the refrigerator to quickly return to a suitable storage temperature, and the refrigeration efficiency is low. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a refrigerator and a method for controlling the rotational speed of its compressor, which can optimize the rotational speed of the compressor according to the actual usage habits and demands of users, so that the temperature inside the refrigerator can quickly return to a suitable storage temperature and the refrigeration efficiency is improved.

[0004] To achieve the above purpose, the embodiments of the present invention provide a refrigerator, including:

[0005] A cabinet, in which at least one storage compartment is formed, and the storage compartment at least includes a refrigerating compartment and a freezing compartment;

[0006] A refrigeration system for providing cooling capacity for the refrigerator, and the refrigeration system includes a compressor, a condenser and an evaporator connected by pipelines;

[0007] A controller, which is configured to:

[0008] When it is detected that the door of any storage compartment is opened in the current detection period, obtain the door opening parameter of the door when it is opened;

[0009] When the door opening parameter first meets a preset user behavior condition in the current detection period, divide the current detection period into time periods; wherein, the current detection period includes a dining time period, a recovery time period and a normal operation time period;

[0010] When the refrigerator is in the dining time period, determine the first compressor speed according to the first duration corresponding to the dining time period, and control the compressor to operate at the first compressor speed;

[0011] When the refrigerator is in the recovery time period, determine the second compressor speed according to the second duration corresponding to the recovery time period and the first compressor speed, and control the compressor to operate at the second compressor speed;

[0012] When the refrigerator is in the normal operation time period, control the compressor to operate at the initial compressor speed.

[0013] The above technical solution has the following advantages or beneficial effects: The compressor speed is reasonably adjusted, avoiding the compressor from being in a high-load operation state for a long time. By detecting and analyzing the refrigerator door opening parameters, the user behavior is accurately judged, the refrigerator operation time period is reasonably divided, and the compressor speed is adjusted specifically in different time periods, so that the temperature in the refrigerator can quickly return to the appropriate storage temperature. This can not only improve the refrigeration efficiency of the refrigerator, better maintain the freshness of food, but also effectively reduce energy consumption and enhance the user experience.

[0014] In some embodiments of the present application, the first compressor speed is greater than the second compressor speed, and the first compressor speed is greater than the initial compressor speed.

[0015] The above technical solution has the following advantages or beneficial effects: In the dining time period, since frequent door opening will increase the temperature in the refrigerator, operating at a higher first compressor speed can quickly enhance the refrigeration capacity, rapidly reduce the temperature in the box, effectively inhibit the growth of bacteria and food spoilage, and maintain the freshness and nutritional components of food; in the recovery time period, operating at a lower second compressor speed can make the temperature in the refrigerator return to the normal level smoothly, avoiding the influence of temperature fluctuations on the food preservation effect. In addition, after the dining time period, when entering the recovery and normal operation time periods, the compressor speed is correspondingly reduced, avoiding unnecessary high-power operation and reducing power consumption.

[0016] In some embodiments of the present application, after the current detection period is divided into time periods, the controller is further configured to:

[0017] If it is detected that the door opening parameter meets or does not meet the user behavior condition in the remaining dining time periods, then control the time period of the current detection period to remain unchanged;

[0018] If it is detected that the door opening parameter meets the user behavior condition in the recovery time period or the normal operation time period, then update the remaining time period of the current detection period.

[0019] The above technical solution has the following advantages or beneficial effects: The refrigerator can intelligently adjust the operation mode and time period according to the actual behavior of the user without manual intervention by the user. When the user uses the refrigerator, whether it is during a continuous dining time period or frequent accidental door openings during other time periods, the refrigerator can automatically make reasonable responses to provide a stable food storage environment, making it more convenient and reassuring for the user to use.

[0020] In some embodiments of the present application, determining the first compressor speed according to the first duration corresponding to the dining time period includes:

[0021] Obtain the door opening parameters detected within a certain time period before entering the dining time period, and determine the first user behavior evaluation value according to the door opening parameters;

[0022] Calculate the first product of the first duration corresponding to the dining time period and the preset first compressor speed coefficient;

[0023] Calculate the first compressor speed according to the first user behavior evaluation value, the initial compressor speed, and the first product.

[0024] The above technical solution has the following advantages or beneficial effects: Calculating the first compressor speed by integrating the first user behavior evaluation value and the initial compressor speed avoids the compressor running blindly at too high a speed. If the speed is adjusted based on a single factor only, there may be a situation of excessive refrigeration, resulting in energy waste. However, the present invention can accurately determine the compressor speed according to the actual behavior of the user and the duration of the dining time period, making the compressor speed conform to the current usage scenario.

[0025] In some embodiments of the present application, determining the second compressor speed according to the second duration corresponding to the recovery time period and the first compressor speed includes:

[0026] Obtain the door opening parameters detected within a certain time period before entering the recovery time period, and determine the second user behavior evaluation value according to the door opening parameters;

[0027] Calculate the second product of the second duration corresponding to the recovery time period and the preset second compressor speed coefficient;

[0028] Calculate the second compressor speed according to the second user behavior evaluation value, the first compressor speed, and the second product.

[0029] The above technical solution has the following advantages or beneficial effects: calculating the second compressor speed by integrating the second user behavior evaluation value and the first compressor speed avoids the compressor blindly operating at too high a speed. If the speed is adjusted based on a single factor only, there may be a situation of excessive refrigeration, resulting in energy waste. However, the present invention can accurately determine the compressor speed according to the actual behavior of the user and the duration of the recovery period, avoiding the compressor running at a high speed for a long time and reducing the energy consumption of the compressor.

[0030] In some embodiments of the present application, the dividing the current detection period into time periods includes:

[0031] Obtaining a first duration corresponding to the first dining time period;

[0032] Determining a second duration corresponding to the recovery period according to the first duration, and determining a third duration of the normal operation period according to the first duration and the second duration;

[0033] Determining the remaining dining time period, recovery period and normal operation period in the current detection period according to the first duration, the second duration and the third duration.

[0034] The above technical solution has the following advantages or beneficial effects: there are differences in the duration of using the refrigerator by different users during the dining time period. By obtaining the first duration of the first dining time period to determine the subsequent time periods, it can closely fit the specific usage habits of the user. Accurate time period division and duration determination enable the refrigerator to adopt targeted temperature control strategies at different stages. In addition, reasonably determining the second duration of the recovery period can ensure that the temperature inside the refrigerator can be restored to an appropriate level in a timely and stable manner after the dining time period, guaranteeing the freshness preservation effect of the food. At the same time, determining the third duration of the normal operation period according to the first duration and the second duration avoids the refrigerator running excessively under unnecessary circumstances and reduces energy consumption.

[0035] In some embodiments of the present application, the door opening parameters include the door opening duration and the number of door openings. After obtaining the door opening parameters when the door is opened, the controller is further configured to:

[0036] When it is detected that the door opening duration is greater than a preset door opening duration threshold, it is determined that the door opening parameters first meet the preset user behavior conditions in the current detection period; or,

[0037] When it is detected that the number of door openings within a set time period is greater than a preset number of door openings threshold, it is determined that the door opening parameters first meet the preset user behavior conditions in the current detection period.

[0038] The above technical solution has the following advantages or beneficial effects: By using the door opening duration and the number of door openings as the key determination parameters, it is possible to accurately capture the user's state during a dining activity. When the door opening duration is greater than the preset door opening duration threshold, it indicates that the user may frequently take or store food within a relatively long period, which is usually consistent with the process of preparing meals or dining, thus enabling an accurate determination of the dining time period. Similarly, when the number of door openings within a set time period is greater than the preset number of door openings threshold, it also shows that the user frequently uses the refrigerator and is very likely engaged in dining-related activities. Such a determination method improves the accuracy of identifying the dining time period and provides a reliable basis for the subsequent reasonable operation control of the refrigerator. When different users use the refrigerator, there are differences in their habits regarding the door opening duration and the number of door openings. By setting the door opening duration threshold and the number of door openings threshold and making a determination based on these two parameters, it can adapt to the usage habits of different users. Regardless of the user's usage pattern, it can accurately identify the dining time period, making the operation strategy of the refrigerator more in line with the actual needs of the user and enhancing the user experience.

[0039] To achieve the above object, an embodiment of the present invention further provides a method for controlling the compressor speed of a refrigerator, including:

[0040] When it is detected that the door of any storage compartment of the refrigerator is opened during the current detection cycle, obtain the door opening parameter of the door when it is opened;

[0041] When the door opening parameter first meets the preset user behavior condition during the current detection cycle, divide the current detection cycle into time periods; wherein, the current detection cycle includes a dining time period, a recovery time period, and a normal operation time period;

[0042] When the refrigerator is in the dining time period, determine the first compressor speed according to the first duration corresponding to the dining time period, and control the compressor to operate at the first compressor speed;

[0043] When the refrigerator is in the recovery time period, determine the second compressor speed according to the second duration corresponding to the recovery time period and the first compressor speed, and control the compressor to operate at the second compressor speed;

[0044] When the refrigerator is in the normal operation time period, control the compressor to operate at the initial compressor speed.

[0045] The above technical solution has the following advantages or beneficial effects: By reasonably adjusting the compressor speed, the compressor is prevented from operating at a high load for a long time. Through the detection and analysis of the refrigerator door opening parameters, the user behavior is accurately judged, the refrigerator operation time period is reasonably divided, and the compressor speed is adjusted specifically within different time periods, enabling the temperature inside the refrigerator to quickly return to the appropriate storage temperature. This can not only improve the refrigeration efficiency of the refrigerator, better maintain the freshness of food, but also effectively reduce energy consumption and enhance the user experience.

[0046] In some embodiments of the present application, the first compressor speed is greater than the second compressor speed, and the first compressor speed is greater than the initial compressor speed.

[0047] The above technical solution has the following advantages or beneficial effects: During the dining time period, since frequent door opening will increase the temperature inside the refrigerator, operating at a higher first compressor speed can quickly enhance the refrigeration capacity, rapidly reduce the temperature inside the box, effectively inhibit the growth of bacteria and food spoilage, and maintain the freshness and nutritional components of food; during the recovery time period, operating at a lower second compressor speed can enable the temperature inside the refrigerator to steadily return to the normal level, avoiding the impact of temperature fluctuations on the food preservation effect. Additionally, after the dining time period, when entering the recovery and normal operation time periods, the compressor speed is correspondingly reduced, avoiding unnecessary high-power operation and reducing power consumption.

[0048] In some embodiments of the present application, after dividing the current detection period into time periods, the method further includes:

[0049] If it is detected that the door opening parameter satisfies or does not satisfy the user behavior condition in the remaining dining time periods, then control the time period of the current detection period to remain unchanged;

[0050] If it is detected that the door opening parameter satisfies the user behavior condition in the recovery time period or the normal operation time period, then update the remaining time period of the current detection period.

[0051] The above technical solution has the following advantages or beneficial effects: The refrigerator can intelligently adjust the operation mode and time period according to the actual behavior of the user without manual intervention by the user. When the user uses the refrigerator, whether it is during continuous dining time periods or accidental frequent door opening in other time periods, the refrigerator can automatically make reasonable responses, providing a stable food storage environment and making it more convenient and reassuring for the user to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a schematic external structure diagram of a refrigerator provided by an embodiment of the present invention;

[0053] Figure 2It is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0054] Figure 3 It is a schematic diagram of the structure of a refrigeration system in the refrigerator provided by an embodiment of the present invention;

[0055] Figure 4 It is a schematic diagram of the connection of a controller and its control components provided by an embodiment of the present invention;

[0056] Figure 5 It is the first working flow chart of the controller provided by an embodiment of the present invention;

[0057] Figure 6 It is the second working flow chart of the controller provided by an embodiment of the present invention;

[0058] Figure 7 It is the third working flow chart of the controller provided by an embodiment of the present invention;

[0059] Figure 8 It is the fourth working flow chart of the controller provided by an embodiment of the present invention;

[0060] Figure 9 It is the fifth working flow chart of the controller provided by an embodiment of the present invention;

[0061] Figure 10 It is a flow chart of a method for controlling the rotational speed of a compressor of a refrigerator provided by an embodiment of the present invention.

[0062] Among them, 100, refrigerator; 10, touch screen; 20, controller; 30, memory; 40, temperature sensor; 401, refrigerating chamber temperature sensor; 402, freezing chamber temperature sensor; 50, air door; 60, blower; 111, refrigerating chamber; 112, freezing chamber; 101, compressor; 102, evaporator; 103, capillary tube; 104, condenser; 105, ambient humidity sensor; 106, ambient temperature sensor. Detailed implementation manners

[0063] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0064] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the 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.

[0065] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0066] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0067] See Figure 1 , Figure 1 FIG. is a schematic diagram of the external structure of a refrigerator 100 provided by an embodiment of the present invention. The refrigerator 100 of this embodiment has an approximate cuboid shape. The refrigerator includes a box body that defines a storage space and one or more door bodies provided at the opening of the box body. Among them, the door body includes a door body outer shell located outside the box body, a door body inner liner located inside the box body, an upper end cover, a lower end cover, and an insulating layer located between the door body outer shell, the door body inner liner, the upper end cover, and the lower end cover; generally, the insulating layer is filled with foaming material. The box body is provided with a chamber, and the chamber includes a component storage chamber for placing components in the refrigerator, such as a compressor compartment, etc., and also includes a storage space for storing food, etc.

[0068] See Figure 2 , Figure 2 FIG. is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention. The storage space can be divided into multiple storage rooms. According to different uses, the storage rooms can be configured as a refrigerating chamber 111 and a freezing chamber 112, and can also include a variable temperature chamber, a vacuum drawer, a humidity-preserving drawer, etc. Each storage room corresponds to one or more door bodies. For example, in Figure 2The storage room at the upper part is provided with a double-opening door body. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to realize drawer-like storage.

[0069] See also Figure 3 , Figure 3 The schematic diagram of the structure of the refrigeration system in the refrigerator 100 provided in the embodiment of the present invention, the refrigeration system includes a compressor 101, an evaporator 102, a drying filter (not shown in the figure), a capillary tube 103, a condenser 104 and a gas-liquid separator (not shown in the figure). The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process. Among them, the compression process is: plug in the power cord of the refrigerator, when the contacts of the thermostat are connected, the compressor 101 starts to work, and the low-temperature and low-pressure refrigerant is sucked into the compressor 101, and is compressed into a high-temperature and high-pressure superheated gas in the cylinder of the compressor 101 and then discharged into the condenser 104; the condensation process is: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 104, the temperature continues to drop, and is gradually cooled to a saturated vapor of normal temperature and high pressure, and is further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows ... The process is as follows: the condensed refrigerant saturated liquid is filtered through a drying filter to remove moisture and impurities and then flows into the capillary 103, through which it is throttled and depressurized, and the refrigerant becomes wet steam at room temperature and low pressure; the evaporation process is as follows: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 102, which not only reduces the temperature of the evaporator 102 and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 102 passes through the gas-liquid separator and returns to the compressor 101 again, and the above process is repeated to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0070] See also Figure 4 , Figure 4 : is a connection diagram of a controller and its control components provided by an embodiment of the present invention, wherein the refrigerator 100 comprises:

[0071] A touch screen 10 is provided on one of the cabinet doors, and is used to display prompt information and receive touch operations of the user;

[0072] The controller 20 is disposed in the box and is used to receive detection data from the temperature sensor 40, the ambient humidity sensor 105 and the ambient temperature sensor 106, and to control the opening and closing of the damper 50, the fan 60 and the compressor 101;

[0073] A memory 30 for storing the operating parameters of the refrigerator, such as the defrosting temperature of the evaporator detected by a defrosting sensor, the temperature of the storage compartment detected by a temperature sensor, the fan speed, the compressor speed, the defrosting time, etc.;

[0074] A temperature sensor 40, including a refrigerating temperature sensor 401 and a freezing temperature sensor 402. The refrigerating temperature sensor 401 is disposed in the refrigerating compartment for obtaining the temperature of the refrigerating compartment, and the freezing temperature sensor 402 is disposed in the freezing compartment for obtaining the temperature of the freezing compartment;

[0075] An air damper 50, including a refrigerating air damper and a freezing air damper. The refrigerating air damper is disposed in the air duct communicating with the refrigerating compartment. When the refrigerating air damper is opened, the cold air in the air duct can smoothly enter the refrigerating compartment. When the refrigerating air damper is closed, the cold air in the air duct cannot enter the refrigerating compartment. The freezing air damper is disposed in the air duct communicating with the freezing compartment. When the freezing air damper is opened, the cold air in the air duct can smoothly enter the freezing compartment. When the freezing air damper is closed, the cold air in the air duct cannot enter the freezing compartment;

[0076] A fan 60 is disposed in the air duct of the refrigerator for causing air to enter the evaporator for heat exchange and sending the air after heat release to the storage compartment of the refrigerator;

[0077] An ambient humidity sensor 105 is disposed outside the refrigerator body for detecting the ambient humidity of the environment where the refrigerator is located. After sending this ambient humidity to the controller, the controller can adjust its operating parameters according to the ambient humidity;

[0078] An ambient temperature sensor 106 is disposed outside the refrigerator body for detecting the ambient temperature of the environment where the refrigerator is located. After sending this ambient temperature to the controller, the controller can adjust its operating parameters according to the ambient temperature.

[0079] Specifically, the controller of the refrigerator is configured to: when it is detected that the door of any storage compartment is opened in the current detection period, obtain the door opening parameter when the door is opened; when the door opening parameter first meets the preset user behavior condition in the current detection period, divide the current detection period into time periods; wherein, the current detection period includes a dining time period, a recovery time period, and a normal operation time period; when the refrigerator is in the dining time period, determine a first compressor speed according to the first duration corresponding to the dining time period, and control the compressor to operate at the first compressor speed; when the refrigerator is in the recovery time period, determine a second compressor speed according to the second duration corresponding to the recovery time period and the first compressor speed, and control the compressor to operate at the second compressor speed; when the refrigerator is in the normal operation time period, control the compressor to operate at the initial compressor speed.

[0080] Exemplarily, refer to Figure 5 , Figure 5 which is the first working flowchart of the controller provided by the embodiments of the present invention. The controller is configured to execute steps S11 to S20. Since there are multiple storage doors, especially for a refrigerator divided into a refrigerating chamber and a freezing chamber, no matter which storage door is opened at this time, the door opening parameters of this storage door need to be recorded. In the embodiments of the present invention, a 24-hour day is used as a detection period, that is, 0-24 hours of each day is used as a detection period. During a detection period, if the door opening parameters are detected to first meet the user behavior conditions, it means that the user frequently uses the refrigerator at this time and is very likely to need to cook. Therefore, it is determined that the refrigerator enters the first dining time period of the current detection period. A detection period is divided into at least one dining time period, at least one recovery time period, and at least one normal operation time period. The dining time period indicates that the user needs to cook and may frequently use the refrigerator at this time. The recovery time period follows the dining time period immediately, indicating that after the user finishes eating, the refrigerator is no longer needed and the refrigerator can gradually return to the normal operation time period.

[0081] Exemplarily, when the door opening parameters are detected to first meet the user behavior conditions, for example, the user frequently opens the door of the refrigerating chamber at 7:00 am, and at this time the door opening parameters first meet the user behavior conditions. First, the duration of the dining time period is determined. For example, the duration is ×, and the range of x is 60-240 min. The specific value of x can be determined according to the door opening parameters and is in a direct proportional relationship. Since the time when the dining time period is first entered is 7:00 am, it can be determined that the dining time period will appear three times in the current detection period, corresponding to breakfast, lunch, and dinner. It is also necessary to determine the remaining two dining time periods. After knowing the duration of the first dining time period, the distribution of the recovery time period and the normal operation time period in the current detection period can be further determined. Then, the current detection period is pre-completely divided into different time periods. When the refrigerator enters these time periods, the operating parameters can be adjusted to adapt to the current time period.

[0082] It should be noted that during the current detection period, if the door opening parameters never meet the user behavior conditions, it is defaulted that the refrigerator is in the normal operation time period. If the user frequently opens the door of the refrigerating chamber at 11:00 am and the door opening parameters first meet the user behavior conditions, according to common sense, it can be determined that the dining time period will appear twice in the current detection period, corresponding to lunch and dinner. Therefore, it is also necessary to determine the remaining one dining time period and the remaining recovery time period and normal operation time period.

[0083] Exemplarily, the first compressor speed is greater than the second compressor speed, and the first compressor speed is greater than the initial compressor speed. When the refrigerator is in the dining time period, the compressor is controlled to operate at a higher first compressor speed. In the dining time period, since frequent door opening will increase the temperature in the refrigerator, the operation according to the higher first compressor speed can quickly enhance the refrigeration capacity, quickly reduce the temperature in the box, effectively inhibit the growth of bacteria and food deterioration, and maintain the freshness and nutritional content of the food. When the refrigerator is in the recovery time period, the compressor is controlled to operate at a lower second compressor speed. The recovery time period is operated according to the lower second compressor speed, which can smoothly restore the temperature in the refrigerator to a normal level and avoid the influence of temperature fluctuations on the food preservation effect. When the refrigerator is in the normal operation time period, the compressor is controlled to operate at a lower initial compressor speed. In addition, after the dining time period, the compressor enters the recovery and normal operation time periods, and the compressor speed is reduced accordingly, avoiding unnecessary high-power operation and reducing power consumption.

[0084] In the embodiment of the present invention, by reasonably adjusting the compressor speed, the compressor is prevented from being in a high-load operation state for a long time. By detecting and analyzing the opening parameters of the refrigerator door, the user behavior is accurately judged, the refrigerator operation time period is reasonably divided, and the compressor speed is adjusted in a targeted manner in different time periods, so that the temperature in the refrigerator is quickly restored to a suitable storage temperature, which can not only improve the refrigerator's refrigeration efficiency and better maintain the freshness of food, but also effectively reduce energy consumption and enhance the user experience.

[0085] Specifically, after the current detection cycle is divided into time periods, the controller is also configured to: if it is detected that the door opening parameters meet or do not meet the user behavior conditions in the remaining dining time periods, then the time period of the current detection cycle is controlled to remain unchanged; if it is detected that the door opening parameters meet the user behavior conditions in the recovery time period or the normal operating time period, then the remaining time period of the current detection cycle is updated.

[0086] For example, see Figure 6 , Figure 6This is the second working flowchart of the controller provided by the embodiments of the present invention. After executing step S14, the controller is further configured to execute steps S21 to S22. When other time periods of the entire detection cycle are divided after first entering the dining time period, since the time periods have been pre-divided at this time, when the door opening parameter is detected to meet the user behavior condition in the remaining dining time periods, the time period of the current detection cycle is controlled to remain unchanged. This is because in the remaining dining time periods, the user behavior meets the expectation. At this time, keeping the time period unchanged, the refrigerator can maintain the corresponding operation mode, continue to quickly respond to the temperature change caused by frequent door opening, continuously provide a good fresh-keeping environment for food, and prevent the fresh-keeping effect of food from being affected due to the change of the operation mode. Even if the user behavior condition is not met at this time, the division of the current time period remains unchanged. It may be because the user really needs to dine at this time, but the number of times of opening the refrigerator door is small or the time is short, so there is no need to update the time period. If the door opening parameter is detected to meet the user behavior condition in the recovery time period or the normal operation time period, the remaining time period of the current detection cycle is updated. This is because the unexpected frequent door opening behavior of the user in these time periods indicates that the temperature and environment in the refrigerator may be affected by new interference. Timely updating the remaining time period, such as updating the recovery time period to the dining time period, and then re-dividing the subsequent time periods, can make the refrigerator re-adjust the operation mode and better adapt to the sudden change of user behavior.

[0087] In the embodiments of the present invention, the refrigerator can intelligently adjust the operation mode and time period according to the actual behavior of the user without manual intervention by the user. When the user uses the refrigerator, whether it is in a continuous dining time period or unexpected frequent door opening in other time periods, the refrigerator can automatically make a reasonable response and provide a stable food storage environment, making it more convenient and reassuring for the user to use.

[0088] Specifically, the door opening parameter includes the opening duration and the number of door openings. After obtaining the door opening parameter of the door when it is opened, the controller is further configured to: when it is detected that the opening duration is greater than a preset opening duration threshold, determine that the door opening parameter first meets the preset user behavior condition in the current detection cycle; or, when it is detected that the number of door openings within a set time period is greater than a preset number of door openings threshold, determine that the door opening parameter first meets the preset user behavior condition in the current detection cycle.

[0089] Exemplarily, the opening duration threshold is 2 min (or other value), the set time period is 1 h (or other value), and the number of door openings threshold is 5 times (or other value). If the user opens the door 10 times within 1 h, or the single opening time reaches more than 2 min, it is determined that the door opening parameter first meets the preset user behavior condition in the current detection cycle.

[0090] In the embodiments of the present invention, using the door opening duration or the number of door openings as the key determination parameter can accurately capture the state of the user being in a dining activity. When the door opening duration is greater than the preset door opening duration threshold, it indicates that the user may frequently take or store food within a relatively long time, which usually conforms to the process of preparing meals or dining, and thus the dining time period can be accurately determined. Similarly, when the number of door openings within a set time period is greater than the preset number of door openings threshold, it also indicates that the user frequently uses the refrigerator and is very likely in a dining-related activity. Such a determination method improves the accuracy of identifying the dining time period and provides a reliable basis for the subsequent reasonable operation control of the refrigerator. When different users use the refrigerator, there are differences in their habits of door opening duration and the number of door openings. By setting the door opening duration threshold and the number of door openings threshold and making a determination based on these two parameters, it can adapt to the usage habits of different users. No matter what usage method the user has, the dining time period can be relatively accurately identified, making the operation strategy of the refrigerator more in line with the actual needs of the user and enhancing the user experience.

[0091] Specifically, referring to Figure 7 , Figure 7 is the third working flowchart of the controller provided by the embodiments of the present invention. The step S14 specifically includes steps S141 to S143. The division of the time period for the current detection cycle includes: obtaining the first duration corresponding to the first dining time period; determining the second duration corresponding to the recovery time period according to the first duration, and determining the third duration of the normal operation time period according to the first duration and the second duration; determining the remaining dining time period, recovery time period, and normal operation time period in the current detection cycle according to the first duration, the second duration, and the third duration.

[0092] Exemplarily, the embodiments of the present invention provide the following division methods for the first duration, the second duration, and the third duration:

[0093] For example, if the first duration x = 120 min, the approximate distribution of the dining time periods is as follows:

[0094] 1) Breakfast time period A1: 06:00 - 08:00;

[0095] 2) Lunch time period A2: 11:00 - 13:00;

[0096] 3) Dinner time period A3: 17:00 - 19:00;

[0097] Suppose the second duration is denoted as y, and the range of y is 0 - 240 min. Determining the second duration corresponding to the recovery period according to the first duration includes: determining an initial user behavior evaluation value according to the cabinet door opening parameter; calculating the second duration corresponding to the recovery period according to the first duration, the initial user behavior evaluation value, and a preset second duration coefficient. That is, the calculation process of the second duration y satisfies the following formula:

[0098] y = K 1 *x + k 2 *T (1);

[0099] where x is the first duration corresponding to the dining period, in minutes; T is the initial user behavior evaluation value, in seconds, T = N * t, N is the number of door openings, and t is the duration of a single door opening, in seconds; K 1 is the first duration coefficient, which can be preset, such as K 1 = 0.8; K 2 is the second duration coefficient, which can be preset, such as K 2 = 15.

[0100] The names of the records in the recovery period are denoted as B1, B2, B3, and their corresponding second durations are, for example:

[0101] 1) y = 120, B1 = 120 min, then the 2 h after A1 / A2 / A3 is the recovery period.

[0102] 2) y = 180, B2 = 180 min, then the 3 h after A1 / A2 / A3 is the recovery period.

[0103] 3) y = 240, B3 = 240 min, then the 4 h after A1 / A2 / A3 is the recovery period.

[0104] If y = 240, in the above example, after A1, there is only 180 min, which cannot meet y = 240 min, so it is automatically converted to y = 180 min.

[0105] After a single dining period and recovery period are completed, before reaching the next dining period, the continuous duration z can be calculated. z is a number between 0 and 1440, in minutes. If it is 0, it may be that the recovery period is long, and at this time, the next dining period will start immediately after the recovery period; if it is 1440, it may be that the user has not opened the refrigerator door all day, and at this time, there is no need to divide the detection period, and the refrigerator has been in the normal operation period all the time. After the dining period and recovery period are determined, the remaining time is divided into the normal operation period.

[0106] In the embodiments of the present invention, the usage durations of the refrigerator by different users during the dining time period vary. By obtaining the first duration of the first dining time period to determine subsequent time periods, it is possible to closely conform to the specific usage habits of users. The accurate time period division and duration determination enable the refrigerator to adopt targeted temperature control strategies at different stages. In addition, reasonably determining the second duration of the recovery time period can ensure that the temperature inside the refrigerator can be promptly and stably restored to an appropriate level after the dining time period, guaranteeing the freshness preservation effect of food. At the same time, determining the third duration of the normal operation time period based on the first duration and the second duration avoids excessive operation of the refrigerator under unnecessary circumstances and reduces energy consumption.

[0107] Specifically, referring to Figure 8 , Figure 8 FIG. is the fourth working flowchart of the controller provided by the embodiments of the present invention. The step S16 specifically includes steps S161 to S163. The determining the first compressor speed according to the first duration corresponding to the dining time period includes: obtaining the door opening parameters detected within a certain time period before entering the dining time period, and determining the first user behavior evaluation value according to the door opening parameters; calculating the first product of the first duration corresponding to the dining time period and the preset first compressor speed coefficient; calculating the first compressor speed according to the first user behavior evaluation value, the initial compressor speed, and the first product.

[0108] Exemplarily, the refrigerator is in a normal operating state and is connected to the network, and the key operating parameters of the refrigerator are confirmed. There is no door opening operation on the refrigerator. According to the ambient temperature section during normal operation, the initial compressor speed is confirmed to be S rpm. The refrigerator runs to the dining time period A1. The first compressor speed of this time period needs to synchronize with the first duration x of the dining time period. The calculation process of the first compressor speed F A1 of the first dining time period satisfies the following formula:

[0109] F A1 = S + f 1 * x + T 1 / 60 * 10 (2);

[0110] wherein, f 1 is the first compressor speed coefficient, which can be preset. For example, it satisfies f 1 = 15; T1 is the first user behavior evaluation value within a certain time period (such as 2h) before entering the dining time period, and T 1 = N 1 / t 1 , N 1 is the number of door openings within a certain time period before entering the dining time period, and t 1is the door opening duration within a certain period before entering the dining time period. It should be noted that the maximum rotational speed of the compressor is 4500 rpm. If F A1 exceeds this value, it will be executed at 4500 rpm.

[0111] Specifically, refer to Figure 9 , Figure 9 which is the fifth working flowchart of the controller provided by the embodiment of the present invention. The step S18 specifically includes steps S181 to S183. The determination of the second compressor speed according to the second duration corresponding to the recovery period and the first compressor speed includes: obtaining the door opening parameters detected within a certain period before entering the recovery period, and determining the second user behavior evaluation value according to the door opening parameters; calculating the second product of the second duration corresponding to the recovery period and the preset second compressor speed coefficient; calculating the second compressor speed according to the second user behavior evaluation value, the first compressor speed, and the second product.

[0112] Exemplarily, when the refrigerator runs to the recovery period B1, its second compressor speed value is recalculated according to the value of F B1 The calculation process of the second compressor speed F B1 in the first recovery period satisfies the following formula:

[0113] F B1 = F A1 - f 2 * y - T 2 / 60 * 10 (3);

[0114] where f 2 is the second compressor speed coefficient, which can be preset. For example, it satisfies f 2 = 15; T 2 is the second user behavior evaluation value within a certain period (such as 2 h) before entering the recovery period. T 2 = N 2 / t 2 , N 2 is the number of door openings within a certain period before entering the recovery period; t 2 is the door opening duration within a certain period before entering the recovery period.

[0115] When the refrigerator enters the normal operation period C1, during normal operation, the compressor speed F C1 of the first normal operation period is restored to Srpm, that is, F C1 = S. When the clock runs to the dining period A2, in the same way, calculate F A2 , F B2 , F C2 ; and calculate FA3 , F B3 , F c3 .

[0116] Exemplarily, by obtaining the door opening parameters within a certain period before entering the dining time period to determine the first user behavior evaluation value, it is possible to comprehensively consider the user's recent usage habits and frequencies. For example, if the user frequently and for a long time opens the refrigerator door before entering the dining time period, the first user behavior evaluation value will be relatively high, which reflects that the temperature inside the refrigerator is more affected and the food may be more likely to deteriorate. Considering this evaluation value when calculating the first compressor speed makes the adjustment of the compressor speed more in line with the actual situation. When the evaluation value is high, the compressor speed will be appropriately increased to enhance the refrigeration capacity, quickly reduce the temperature inside the box, effectively inhibit the growth of bacteria, better maintain the freshness and nutritional components of the food, and meet the user's demand for food preservation. Additionally, calculate the first product of the first duration corresponding to the dining time period and the preset first compressor speed coefficient, and further adjust the compressor speed by combining the duration factor. A longer dining time period means that the user has more time to frequently use the refrigerator and has a higher demand for refrigeration. Through this product calculation, the compressor speed can be matched with the duration of the dining time period. For example, if the first duration is long, the first product will be large, and thus the speed will be correspondingly increased when calculating the first compressor speed to ensure that the refrigerator can maintain a suitable low-temperature environment throughout the dining time period and provide good storage conditions for the food.

[0117] In the embodiment of the present invention, the compressor speed is calculated by comprehensively considering the user behavior evaluation value and the initial compressor speed, avoiding the compressor running blindly at too high a speed. If the speed is adjusted based on a single factor only, there may be a situation of over-refrigeration, resulting in energy waste. However, the present invention can accurately determine the compressor speed according to the user's actual behavior and the duration of the dining time period, making the compressor speed conform to the current usage scenario.

[0118] See Figure 10 , Figure 10 which is a flowchart of a compressor speed control method for a refrigerator provided by an embodiment of the present invention. The compressor speed control method for the refrigerator is implemented by a controller in the refrigerator. The compressor speed control method for the refrigerator includes:

[0119] S1. When it is detected that the door of any storage compartment of the refrigerator is opened in the current detection cycle, obtain the door opening parameters when the door is opened;

[0120] S2. When the door opening parameters first meet the preset user behavior conditions in the current detection cycle, divide the current detection cycle into time periods; wherein, the current detection cycle includes a dining time period, a recovery time period, and a normal operation time period;

[0121] S3. When the refrigerator is in the dining time period, determine the first compressor speed according to the first duration corresponding to the dining time period, and control the compressor to operate at the first compressor speed;

[0122] S4. When the refrigerator is in the recovery time period, determine the second compressor speed according to the second duration corresponding to the recovery time period and the first compressor speed, and control the compressor to operate at the second compressor speed;

[0123] S5. When the refrigerator is in the normal operation time period, control the compressor to operate at the initial compressor speed.

[0124] Specifically, the first compressor speed is greater than the second compressor speed, and the first compressor speed is greater than the initial compressor speed.

[0125] Specifically, after dividing the current detection period into time periods, the method further includes: if it is detected that the door opening parameter meets or does not meet the user behavior condition in the remaining dining time periods, then control the time period of the current detection period to remain unchanged; if it is detected that the door opening parameter meets the user behavior condition in the recovery time period or the normal operation time period, then update the remaining time period of the current detection period.

[0126] Specifically, the determining the first compressor speed according to the first duration corresponding to the dining time period includes: obtaining the door opening parameter detected within a certain time period before entering the dining time period, and determining the first user behavior evaluation value according to the door opening parameter; calculating the first product of the first duration corresponding to the dining time period and the preset first compressor speed coefficient; calculating the first compressor speed according to the first user behavior evaluation value, the initial compressor speed, and the first product.

[0127] Specifically, the determining the second compressor speed according to the second duration corresponding to the recovery time period and the first compressor speed includes: obtaining the door opening parameter detected within a certain time period before entering the recovery time period, and determining the second user behavior evaluation value according to the door opening parameter; calculating the second product of the second duration corresponding to the recovery time period and the preset second compressor speed coefficient; calculating the second compressor speed according to the second user behavior evaluation value, the first compressor speed, and the second product.

[0128] Specifically, the division of time periods for the current detection cycle includes: obtaining a first duration corresponding to the first dining time period; determining a second duration corresponding to the recovery time period according to the first duration, and determining a third duration of the normal operation time period according to the first duration and the second duration; determining the remaining dining time period, the recovery time period, and the normal operation time period in the current detection cycle according to the first duration, the second duration, and the third duration.

[0129] Specifically, the door opening parameters of the box door include the door opening duration and the number of door openings. After obtaining the door opening parameters of the box door when it is opened, the method further includes: when it is detected that the door opening duration is greater than a preset door opening duration threshold, determining that the door opening parameters first meet the preset user behavior conditions in the current detection cycle; or, when it is detected that the number of door openings within a set time period is greater than a preset number of door openings threshold, determining that the door opening parameters first meet the preset user behavior conditions in the current detection cycle.

[0130] It should be noted that the working process of the compressor speed control method of the refrigerator described in the embodiments of the present invention can refer to the working flowchart of the controller in the refrigerator described in the above embodiments, and will not be elaborated here.

[0131] The above are the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A refrigerator, characterized in that: include: a box body, in which at least one storage chamber is formed, and the storage chamber includes at least a refrigerating chamber and a freezing chamber; A refrigeration system, used to provide coldness for the refrigerator, the refrigeration system comprising a compressor, a condenser and an evaporator connected by pipelines; Controller, the controller is configured as: When it is detected that the door of any storage room is opened in the current detection cycle, the door opening parameters of the door are obtained; When the door opening parameter meets the preset user behavior condition for the first time in the current detection cycle, the current detection cycle is divided into time periods; wherein the current detection cycle includes a dining time period, a recovery time period and a normal operation time period; When the refrigerator is in a dining time period, determining a first compressor speed according to a first duration corresponding to the dining time period, and controlling the compressor to operate at the first compressor speed; When the refrigerator is in a recovery time period, determining a second compressor speed according to a second duration corresponding to the recovery time period and the first compressor speed, and controlling the compressor to operate at the second compressor speed; When the refrigerator is in a normal operation period, the compressor is controlled to operate at an initial compressor speed.

2. The refrigerator according to claim 1, characterized in that: The first compressor speed is greater than the second compressor speed, and the first compressor speed is greater than the initial compressor speed.

3. The refrigerator according to claim 1, characterized in that: After dividing the current detection cycle into time periods, the controller is further configured to: If it is detected in the remaining dining time period that the door opening parameter meets or does not meet the user behavior condition, the time period of the current detection cycle is controlled to remain unchanged; If it is detected during the recovery time period or the normal operation time period that the door opening parameters meet the user behavior conditions, the remaining time period of the current detection cycle is updated.

4. The refrigerator according to claim 1, characterized in that: The step of determining the first compressor speed according to the first duration corresponding to the dining time period includes: Acquire the door opening parameters detected within a certain time period before entering the dining time period, and determine the first user behavior evaluation value according to the door opening parameters; Calculate a first product of a first duration corresponding to the dining time period and a preset first compressor speed coefficient; A first compressor speed is calculated according to the first user behavior evaluation value, an initial compressor speed, and the first product.

5. The refrigerator according to claim 1, characterized in that: The determining the second compressor speed according to the second duration corresponding to the recovery time period and the first compressor speed includes: Acquire the door opening parameters detected within a certain period of time before entering the recovery period, and determine the second user behavior evaluation value according to the door opening parameters; Calculating a second product of a second duration corresponding to the recovery time period and a preset second compressor speed coefficient; A second compressor speed is calculated according to the second user behavior evaluation value, the first compressor speed and the second product.

6. The refrigerator according to claim 1, characterized in that: The dividing the current detection cycle into time periods includes: Obtain a first duration corresponding to the first dining time period; Determine a second duration corresponding to the recovery time period according to the first duration, and determine a third duration of the normal operation time period according to the first duration and the second duration; The remaining dining time period, recovery time period and normal operation time period in the current detection cycle are determined according to the first time period, the second time period and the third time period.

7. The refrigerator according to claim 1, characterized in that: The door opening parameters include the door opening duration and the door opening times. After obtaining the door opening parameters when the door is opened, the controller is further configured to: When it is detected that the door opening time is greater than the preset door opening time threshold, it is determined that the door opening parameter meets the preset user behavior condition for the first time in the current detection cycle; or, When it is detected that the number of door openings within a set time period is greater than a preset door opening number threshold, it is determined that the box door opening parameters meet the preset user behavior conditions for the first time in the current detection cycle.

8. A method for controlling the speed of a refrigerator compressor, characterized in that: include: When it is detected that a door of any storage compartment of the refrigerator is opened in the current detection cycle, obtaining the door opening parameters of the door when it is opened; When the door opening parameter meets the preset user behavior condition for the first time in the current detection cycle, the current detection cycle is divided into time periods; wherein the current detection cycle includes a dining time period, a recovery time period and a normal operation time period; When the refrigerator is in a dining time period, determining a first compressor speed according to a first duration corresponding to the dining time period, and controlling the compressor to operate at the first compressor speed; When the refrigerator is in a recovery time period, determining a second compressor speed according to a second duration corresponding to the recovery time period and the first compressor speed, and controlling the compressor to operate at the second compressor speed; When the refrigerator is in a normal operation period, the compressor is controlled to operate at an initial compressor speed.

9. The refrigerator compressor speed control method according to claim 8, characterized in that: The first compressor speed is greater than the second compressor speed, and the first compressor speed is greater than the initial compressor speed.

10. The refrigerator compressor speed control method according to claim 8, characterized in that: After dividing the current detection cycle into time periods, the method further includes: If it is detected in the remaining dining time period that the door opening parameter meets or does not meet the user behavior condition, the time period of the current detection cycle is controlled to remain unchanged; If it is detected during the recovery time period or the normal operation time period that the door opening parameters meet the user behavior conditions, the remaining time period of the current detection cycle is updated.

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