Refrigerator and control method thereof

Abstract

According to the refrigerator and the control method thereof, under the conditions of different environment temperatures and different gears of the refrigerator, the heating duration and the cooling duration under the ideal condition are set up in advance, in the actual operation process of the refrigerator, shutdown of a compressor is controlled based on the two factors of the refrigeration shutdown temperature and the cooling duration, and therefore the refrigeration efficiency is improved. The compressor is controlled to be started on the basis of the two factors of the refrigeration starting temperature and the heating duration, the cooling duration is used as the judgment condition for shutdown of the compressor, and the heating duration is used as the starting condition of the compressor. The problem of inaccurate startup and shutdown caused by deviation of a detection value of the temperature sensor arranged in the refrigerating chamber due to sudden placement of articles can be avoided, the temperature of the refrigerating chamber can tend to be constant, and excessive temperature fluctuation of the refrigerating chamber is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a refrigerator and a control method thereof. Background Art

[0002] The refrigerator senses the temperature inside the box through sensors, and controls the temperature of the refrigerated compartment through its start-up and shutdown parameter points. Generally, this parameter is a fixed value. When the refrigerated startup temperature requirement is reached, the refrigerated damper opens and cold air is sent to the refrigerated compartment for cooling; when the refrigerated shutdown temperature requirement is reached, the refrigerated damper closes, cutting off the cold air sent to the refrigerated compartment for warming up. During the refrigerated cooling and warming up process, due to external influences such as the wind field and temperature at the location of the refrigerated temperature sensor, the actual temperature of the compartment is already very low when it is refrigerated, but the temperature at the refrigerated temperature sensor has not reached the shutdown point, so the temperature continues to drop, making the compartment too low; vice versa. Generally, the solution to the above problem is to adjust the start and stop temperature points of the refrigerated compartment so that the compartment temperature coincides with the temperature of the refrigerated temperature sensor. However, in actual use by users, application scenarios such as placing hot objects at the refrigerated temperature sensor, placing objects to block the refrigerated temperature sensor, and placing cold objects at the refrigerated temperature sensor will cause the temperature perception of the refrigerated temperature sensor to deviate, resulting in large temperature fluctuations in the refrigerated compartment. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a refrigerator and a control method thereof, which can make the temperature of the refrigerating compartment tend to be constant and avoid excessive temperature fluctuations.

[0004] To achieve the above object, an embodiment of the present invention provides a refrigerator, comprising:

[0005] 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;

[0006] A door, used for opening and closing the storage room;

[0007] The compressor is used to compress the refrigerant flowing through the refrigerator refrigeration cycle to provide power for the refrigeration cycle;

[0008] A refrigeration temperature sensor is arranged in the refrigeration chamber and is used to detect the real-time refrigeration temperature;

[0009] An ambient temperature sensor, disposed outside the box, for detecting ambient temperature;

[0010] The controller is configured as:

[0011] When it is detected that the compressor is started, the ambient temperature and the current gear position of the refrigerator are obtained;

[0012] Obtaining a corresponding cooling time according to the ambient temperature and the gear position, and obtaining a preset refrigeration shutdown temperature;

[0013] When the real-time refrigeration temperature reaches the refrigeration shutdown temperature or the startup time of the compressor reaches the cooling time, the compressor is controlled to shut down.

[0014] As an improvement of the above solution, the controller is further configured as follows:

[0015] When it is detected that the compressor is stopped, obtaining the ambient temperature and the current gear position of the refrigerator;

[0016] Obtaining a corresponding heating time according to the ambient temperature and the gear position, and obtaining a preset refrigeration startup temperature;

[0017] When the real-time refrigeration temperature reaches the refrigeration startup temperature or the shutdown time of the compressor reaches the heating time, the compressor is controlled to start.

[0018] As an improvement of the above solution, the controller is further configured as follows:

[0019] During the operation of the compressor, calculating the real-time cooling rate of the refrigerating chamber;

[0020] When the real-time cooling rate is less than a preset standard cooling rate, the frequency of the compressor is increased.

[0021] As an improvement of the above solution, the controller is further configured as follows:

[0022] When the real-time cooling rate is less than the preset standard cooling rate, the rotation speed of the air supply fan is increased.

[0023] As an improvement of the above solution, the controller is further configured as follows:

[0024] Calculating the door-closing time of the refrigerating chamber in the closed state;

[0025] When the door closing time reaches a preset door closing time threshold, the refrigeration startup temperature is lowered and the refrigeration shutdown temperature is increased until it is detected that the refrigeration chamber door is opened, and the initial refrigeration startup temperature and refrigeration shutdown temperature are restored.

[0026] To achieve the above object, an embodiment of the present invention further provides a refrigerator control method, comprising:

[0027] When it is detected that the compressor of the refrigerator is started, the ambient temperature and the current gear position of the refrigerator are obtained;

[0028] Obtaining a corresponding cooling time according to the ambient temperature and the gear position, and obtaining a preset refrigeration shutdown temperature;

[0029] When the real-time refrigeration temperature of the refrigerating chamber reaches the refrigeration shutdown temperature or the startup time of the compressor reaches the temperature reduction time, the compressor is controlled to shut down.

[0030] As an improvement of the above solution, the method further includes:

[0031] When it is detected that the compressor is stopped, obtaining the ambient temperature and the current gear position of the refrigerator;

[0032] Obtaining a corresponding heating time according to the ambient temperature and the gear position, and obtaining a preset refrigeration startup temperature;

[0033] When the real-time refrigeration temperature reaches the refrigeration startup temperature or the shutdown time of the compressor reaches the heating time, the compressor is controlled to start.

[0034] As an improvement of the above solution, the method further includes:

[0035] During the operation of the compressor, calculating the real-time cooling rate of the refrigerating chamber;

[0036] When the real-time cooling rate is less than a preset standard cooling rate, the frequency of the compressor is increased.

[0037] As an improvement of the above solution, the method further includes:

[0038] When the real-time cooling rate is less than the preset standard cooling rate, the rotation speed of the air supply fan is increased.

[0039] As an improvement of the above solution, the method further includes:

[0040] Calculating the door-closing time of the refrigerating chamber in the closed state;

[0041] When the door closing time reaches a preset door closing time threshold, the refrigeration startup temperature is lowered and the refrigeration shutdown temperature is increased until it is detected that the refrigeration chamber door is opened, and the initial refrigeration startup temperature and refrigeration shutdown temperature are restored.

[0042] Compared with the prior art, the refrigerator and the control method thereof disclosed in the present invention pre-build ideal heating time and cooling time under different ambient temperatures and when the refrigerator is in different gears. During the actual operation of the refrigerator, the compressor is stopped based on the refrigeration shutdown temperature and the cooling time, and the compressor is started based on the refrigeration startup temperature and the heating time. Since the cooling time is combined as the judgment condition for the compressor to stop, and the heating time is combined as the compressor startup condition, the problem of inaccurate start and stop caused by the deviation of the detection value of the temperature sensor arranged in the cold storage room due to the sudden placement of items can be avoided, and the temperature of the cold storage compartment can be made constant to avoid excessive temperature fluctuations in the cold storage compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0044] Figure 2 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0045] Figure 3 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0046] Figure 4 is a schematic diagram of the connection between the controller and other hardware devices provided by an embodiment of the present invention;

[0047] Figure 5 is a first working flow diagram of a controller provided by an embodiment of the present invention;

[0048] Figure 6 is a second working flow diagram of the controller provided by an embodiment of the present invention;

[0049] Figure 7 is a third working flow diagram of the controller provided in an embodiment of the present invention;

[0050] Figure 8 is a fourth working flow diagram of the controller provided by an embodiment of the present invention;

[0051] Fig. 9 is a fifth working flow chart of the controller provided by an embodiment of the present invention;

[0052] Fig.10 The present invention provides a flowchart of a refrigerator control method.

[0053] Among them, 100, refrigerator; 1, compressor; 2, evaporator; 3, capillary tube; 4, condenser; 101, refrigeration temperature sensor; 102, ambient temperature sensor; 103, compressor; 104, air supply fan. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0057] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] See also Figure 1 , Figure 1 1 is a schematic diagram of the external structure of a refrigerator 100 provided in an embodiment of the present invention. The refrigerator 100 of this embodiment is approximately rectangular in shape. The refrigerator includes a box body defining a storage space and a plurality of door bodies arranged at the opening of the box body, wherein the door body includes a door body shell located outside the box body, a door body liner located inside the box body, an upper end cover, a lower end cover, and an insulation layer located between the door body shell, the door body liner, the upper end cover, and the lower end cover; usually, the insulation layer is filled with foam. The box body is provided with a chamber, wherein the chamber includes a component storage chamber for placing components in the refrigerator, such as a press cabin, etc., and also includes a storage space for storing food, etc.

[0059] See also Figure 2 , Figure 2 : 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. The storage rooms can be configured as refrigerators and freezers according to different uses. They can also include variable temperature rooms, vacuum drawers, moisturizing drawers, etc. Each storage room corresponds to one or more door bodies, for example, Figure 2 The upper storage room 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 achieve drawer-like storage. The refrigerator door is provided with a display screen, which is used to display prompt information and receive user touch operations.

[0060] See also Figure 3 , Figure 3 The schematic diagram of the structure of the refrigeration system in the refrigerator provided by the embodiment of the present invention, the refrigeration system includes a compressor 1, an evaporator 2, a drying filter (not shown in the figure), a capillary tube 3, a condenser 4 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. The compression process is: plug in the power cord of the refrigerator, when the contacts of the thermostat are connected, the compressor 1 starts to work, and the low-temperature and low-pressure refrigerant is sucked into the compressor 1, and is compressed into a high-temperature and high-pressure superheated gas in the cylinder of the compressor 1 and then discharged into the condenser 4; the condensation process is: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 4, 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 3, 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 2, which not only reduces the temperature of the evaporator 2 and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 2 passes through the gas-liquid separator and returns to the compressor 1 again, repeating the above process to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0061] See also Figure 4 , Figure 4It is a connection diagram of the controller provided in an embodiment of the present invention and the remaining hardware devices. The controller described in the embodiment of the present invention is respectively connected to the refrigeration temperature sensor 101, the ambient temperature sensor 102, the compressor 103 and the air supply fan 104. The controller can control the reception of the detection data sent by the refrigeration temperature sensor 101 and the ambient temperature sensor 102, and can also control the start and stop of the refrigeration temperature sensor 101 and the ambient temperature sensor 102. The controller can also control the start and stop of the compressor 103 and the air supply fan 104, and control the speed of the compressor 103 and the air supply fan 104.

[0062] Specifically, the controller is configured to: when it is detected that the compressor is started, obtain the ambient temperature and the current gear position of the refrigerator; obtain the corresponding cooling time according to the ambient temperature and the gear position, and obtain the preset refrigeration shutdown temperature; when the real-time refrigeration temperature reaches the refrigeration shutdown temperature or the startup time of the compressor reaches the cooling time, control the compressor to stop.

[0063] For example, see Figure 5 , Figure 5 is a first working flow chart of a controller provided in an embodiment of the present invention, wherein the controller is configured to execute steps S11 to S16. In the embodiment of the present invention, the refrigeration condition of the refrigerator is tested in advance to obtain the cooling time and the refrigeration stop temperature corresponding to the refrigeration chamber at different ambient temperatures and different gears during the compressor startup process. For example, at an ambient temperature of 25°C and when the refrigeration is adjusted to gear 5, the refrigeration stop temperature set in the control at this time is T 关 , the corresponding cooling time is t 降 It can be understood that the cooling time is the time it takes for the real-time refrigeration temperature of the refrigerating chamber to drop to the refrigerating shutdown temperature. In the actual operation of the refrigerator, the cooling time and the refrigerating shutdown temperature are used to control the shutdown timing of the compressor. When the user places an item close to the refrigerating temperature sensor, the refrigerating temperature sensor will be blocked. At this time, the refrigerating temperature sensor will become slow to sense the temperature, which will cause the cooling time of the refrigerating chamber to become longer. Therefore, t can be controlled at this time. 降 This value is used as a control variable to assist T 关 Temperature control, when cooling, the real-time refrigeration temperature reaches T 关 Or the cooling time reaches t 降 It is required to shut down the compressor so that the temperature difference between the start and stop of the refrigeration is a fixed temperature difference.

[0064] Specifically, the controller is also configured to: when it is detected that the compressor is stopped, obtain the ambient temperature and the current gear position of the refrigerator; obtain the corresponding heating time according to the ambient temperature and the gear position, and obtain the preset refrigeration start-up temperature; when the real-time refrigeration temperature reaches the refrigeration start-up temperature or the shutdown time of the compressor reaches the heating time, control the compressor to start.

[0065] For example, see Figure 6 , Figure 6 is a second working flow chart of the controller provided in an embodiment of the present invention, and the controller is further configured to execute steps S21 to S26. As in the above steps S11 to S16, in the embodiment of the present invention, the shutdown condition of the refrigerator is tested in advance to obtain the corresponding heating time and refrigeration start-up temperature of the refrigeration chamber at different ambient temperatures and different gears during the shutdown of the compressor. For example, at an ambient temperature of 25°C and when the refrigeration is adjusted to gear 5, the refrigeration start-up temperature set in the control is T 开 , the corresponding heating time is t liter. It can be understood that the heating time is the time it takes for the real-time refrigeration temperature of the refrigerating chamber to rise to the refrigerating startup temperature. In the actual operation of the refrigerator, the heating time and the refrigerating startup temperature are used to control the startup timing of the compressor. When the user places an item close to the refrigerating temperature sensor, the refrigerating temperature sensor will be blocked. At this time, the refrigerating temperature sensor will become slow to sense the temperature, which will cause the heating time of the refrigerating chamber to become longer. Therefore, at this time, the value t liter can be used as a control variable in the control to assist T 开 Temperature control, when the temperature rises, the real-time refrigeration temperature reaches T 开 Or when the temperature rise time reaches t rise, it is required to start the compressor so that the temperature difference between the start and stop of the refrigeration is a temperature difference that tends to be fixed.

[0066] Specifically, the controller is further configured to: calculate the real-time cooling rate of the refrigerating chamber during the operation of the compressor; and increase the frequency of the compressor when the real-time cooling rate is less than a preset standard cooling rate.

[0067] For example, see Figure 7 , Figure 7This is the third workflow diagram of the controller provided by the embodiment of the present invention. The controller is also configured to execute steps S31 to S34, and the compressor can be frequency-upgraded. Generally, when the cabinet is stable, the operating frequency of the compressor remains unchanged, and the output cooling capacity is Q1. At this time, the cooling rate ΔT1 (℃ / min) at the refrigeration temperature sensor can be used as a reference value. The temperature change rate can be obtained by calculating the difference between two refrigeration real-time temperature values ​​within a period of time, and then dividing the difference by the time. When hot objects are put in, the refrigeration cooling slows down, and the cooling rate ΔT1 becomes smaller. At this time, the compressor can be required to increase the frequency, increase the output cooling capacity Q1, and quickly cool the temperature of the refrigeration room.

[0068] Specifically, the controller is further configured to increase the rotation speed of the air supply fan when the real-time cooling rate is less than a preset standard cooling rate.

[0069] For example, see Figure 8 , Figure 8 It is the fourth working flow chart of the controller provided by an embodiment of the present invention. The controller is also configured to execute steps S41 to S44. Generally, when the box is in a stable state, the speed of the air supply fan remains unchanged. At this time, the cooling rate ΔT1 (℃ / min) at the refrigeration temperature sensor can be used as a reference value. When hot objects are put in, the refrigeration cooling slows down and the cooling rate ΔT1 becomes smaller. At this time, it is required to increase the speed of the air supply fan to quickly cool down the temperature of the refrigeration chamber.

[0070] In an embodiment of the present invention, the box is controlled to start and stop accordingly through changes in time, temperature, compressor cooling output and air supply fan speed, so as to achieve a fast cooling speed without causing the user's stored items to be frozen due to too long cooling time.

[0071] Specifically, the controller is also configured to: calculate the door closing time length that the refrigerating chamber is in a closed state; when the door closing time length reaches a preset door closing time length threshold, lower the refrigerating startup temperature, and increase the refrigerating shutdown temperature, until it is detected that the refrigerating chamber door is opened, and then restore the initial refrigerating startup temperature and refrigerating shutdown temperature.

[0072] For example, see Fig. 9 , Fig. 9 is a fifth working flow diagram of the controller provided in an embodiment of the present invention, wherein the controller is further configured to execute steps S51 to S57. During the operation of the refrigerator, if the door of the refrigerator compartment is in a closed state for a long time (i.e., the user has not used the refrigerator for a long time), such as if the user has not opened the door for use for more than 24 hours, T is required to 开 Reduce, T 关When the user opens the door and starts normal use, the original set temperature difference is restored, and the box is controlled to start and stop accordingly through the changes in time, temperature, compressor cooling output and air supply fan speed as described above.

[0073] Compared with the prior art, the refrigerator disclosed in the present invention pre-builds ideal heating time and cooling time under different ambient temperatures and when the refrigerator is in different gears. During the actual operation of the refrigerator, the compressor is stopped based on the refrigeration shutdown temperature and the cooling time, and the compressor is started based on the refrigeration startup temperature and the heating time. Since the cooling time is combined as the judgment condition for the compressor to stop, and the heating time is combined as the compressor startup condition, the problem of inaccurate start and stop caused by the deviation of the detection value of the temperature sensor arranged in the cold storage room due to the sudden placement of items can be avoided, and the temperature of the cold storage compartment can be made constant, avoiding excessive temperature fluctuations in the cold storage compartment.

[0074] See also Fig.10 , Fig.10 : is a flow chart of a refrigerator control method provided by an embodiment of the present invention. The refrigerator control method is implemented by a controller in the refrigerator. The refrigerator control method includes:

[0075] S1. When it is detected that the compressor is started, the ambient temperature and the current gear position of the refrigerator are obtained;

[0076] S3, obtaining a corresponding cooling time according to the ambient temperature and the gear position, and obtaining a preset refrigeration shutdown temperature;

[0077] S3. When the real-time refrigeration temperature reaches the refrigeration shutdown temperature or the startup time of the compressor reaches the cooling time, the compressor is controlled to shut down.

[0078] For example, in the embodiment of the present invention, the refrigeration condition of the refrigerator is tested in advance to obtain the cooling time and the refrigeration stop temperature corresponding to the refrigeration chamber at different ambient temperatures and different gears during the compressor startup process. For example, when the ambient temperature is 25°C and the refrigeration is adjusted to gear 5, the refrigeration stop temperature set in the control is T 关 , the corresponding cooling time is t 降It can be understood that the cooling duration is the duration elapsed when the real-time refrigeration temperature of the refrigerating chamber drops to the refrigeration shutdown temperature. During the actual operation of the refrigerator, the cooling duration and the refrigeration shutdown temperature are used to control the shutdown timing of the compressor. When the user places an item close to the refrigeration temperature sensor, the refrigeration temperature sensor will be blocked, and at this time, the refrigeration temperature sensor becomes less sensitive to temperature perception, which will cause the cooling duration of the refrigerating chamber to become longer. Therefore, at this time, the value of t 降 can be used as a control variable to assist in T 关 temperature control. When cooling, when the real-time refrigeration temperature reaches T 关 or the cooling duration reaches t_drop, it is required to turn off the compressor so that the refrigeration on-off temperature difference is a relatively fixed temperature difference.

[0079] Specifically, the method further includes: when it is detected that the compressor shuts down, obtaining the ambient temperature and the current gear of the refrigerator; obtaining the corresponding heating duration according to the ambient temperature and the gear, and obtaining the preset refrigeration startup temperature; when the real-time refrigeration temperature reaches the refrigeration startup temperature or the shutdown duration of the compressor reaches the heating duration, controlling the compressor to start.

[0080] Exemplarily, in the embodiment of the present invention, the shutdown situation of the refrigerator is pre-tested to obtain the corresponding heating duration and refrigeration startup temperature of the refrigerating chamber at different ambient temperatures and different gears during the shutdown process of the compressor. For example, at an ambient temperature of 25°C and the refrigeration adjusted to the 5th gear, the refrigeration startup temperature set in the control at this time is T 开 , and the corresponding heating duration is t 升 . It can be understood that the heating duration is the duration elapsed when the real-time refrigeration temperature of the refrigerating chamber rises to the refrigeration startup temperature. During the actual operation of the refrigerator, the heating duration and the refrigeration startup temperature are used to control the startup timing of the compressor. When the user places an item close to the refrigeration temperature sensor, the refrigeration temperature sensor will be blocked, and at this time, the refrigeration temperature sensor becomes less sensitive to temperature perception, which will cause the heating duration of the refrigerating chamber to become longer. Therefore, at this time, the value of t_raise can be used as a control variable to assist in T 开 temperature control. When heating, when the real-time refrigeration temperature reaches T 开 or the heating duration reaches t_raise, it is required to start the compressor so that the refrigeration on-off temperature difference is a relatively fixed temperature difference.

[0081] Specifically, the method further includes: during the operation of the compressor, calculating the real-time cooling rate of the refrigerating chamber; when the real-time cooling rate is less than the preset standard cooling rate, increasing the frequency of the compressor.

[0082] Exemplarily, the compressor can be frequency-up processed. Generally, when the cabinet is stable, the operating frequency of the compressor remains unchanged, and the output cooling capacity is Q1. At this time, the cooling rate ΔT1 (°C / min) at the refrigerated temperature sensor can be used as a reference value. When hot objects are put in, the refrigeration cooling slows down and the cooling rate ΔT1 becomes smaller. At this time, the compressor can be required to frequency-up to increase the output cooling capacity Q1 and quickly cool down the temperature of the refrigerated room.

[0083] Specifically, the method further includes: when the real-time cooling rate is less than a preset standard cooling rate, increasing the rotation speed of the air supply fan.

[0084] For example, when the box is stable, the speed of the air supply fan remains unchanged. At this time, the cooling rate ΔT1 (℃ / min) at the refrigeration temperature sensor can be used as a reference value. When hot objects are put in, the refrigeration cooling slows down and the cooling rate ΔT1 becomes smaller. At this time, it is required to increase the speed of the air supply fan to quickly cool down the temperature of the refrigerator.

[0085] In an embodiment of the present invention, the box is controlled to start and stop accordingly through changes in time, temperature, compressor cooling output and air supply fan speed, so as to achieve a fast cooling speed without causing the user's stored items to be frozen due to too long cooling time.

[0086] Specifically, the method also includes: calculating the door closing time length that the refrigerating chamber is in a closed state; when the door closing time length reaches a preset door closing time length threshold, lowering the refrigerating startup temperature, and increasing the refrigerating shutdown temperature, until it is detected that the door of the refrigerating chamber is opened, restoring the initial refrigerating startup temperature and refrigerating shutdown temperature.

[0087] For example, during the operation of the refrigerator, if the door of the refrigerator compartment is in a closed state for a long time (i.e., the user has not used the refrigerator for a long time), if the user has not opened the door for more than 24 hours, T is required to 开 Reduce, T 关 When the user opens the door and starts normal use, the original set temperature difference is restored, and the box is controlled to start and stop accordingly through the changes in time, temperature, compressor cooling output and air supply fan speed as described above.

[0088] Compared with the prior art, the refrigerator control method disclosed in the present invention pre-builds ideal heating time and cooling time under different ambient temperatures and when the refrigerator is in different gears. During the actual operation of the refrigerator, the compressor shutdown is controlled based on the refrigeration shutdown temperature and the cooling time, and the compressor startup is controlled based on the refrigeration startup temperature and the heating time. Since the cooling time is combined as the judgment condition for the compressor shutdown, and the heating time is combined as the compressor startup condition, the problem of inaccurate startup and shutdown caused by the deviation of the detection value of the temperature sensor arranged in the cold storage room due to the sudden placement of items can be avoided, and the temperature of the cold storage compartment can be made constant to avoid excessive temperature fluctuations in the cold storage compartment.

[0089] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection 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 door, used for opening and closing the storage chamber; The compressor is used to compress the refrigerant flowing through the refrigerator refrigeration cycle to provide power for the refrigeration cycle; A refrigeration temperature sensor is arranged in the refrigeration chamber and is used to detect the real-time refrigeration temperature; An ambient temperature sensor, disposed outside the box, for detecting ambient temperature; The controller is configured as: When it is detected that the compressor is started, the ambient temperature and the current gear position of the refrigerator are obtained; Obtaining a corresponding cooling time according to the ambient temperature and the gear position, and obtaining a preset refrigeration shutdown temperature; When the real-time refrigeration temperature reaches the refrigeration shutdown temperature or the startup time of the compressor reaches the cooling time, the compressor is controlled to shut down.

2. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When it is detected that the compressor is stopped, obtaining the ambient temperature and the current gear position of the refrigerator; Obtaining a corresponding heating time according to the ambient temperature and the gear position, and obtaining a preset refrigeration startup temperature; When the real-time refrigeration temperature reaches the refrigeration startup temperature or the shutdown time of the compressor reaches the heating time, the compressor is controlled to start.

3. The refrigerator according to claim 1, characterized in that: The controller is also configured to: During the operation of the compressor, calculating the real-time cooling rate of the refrigerating chamber; When the real-time cooling rate is less than a preset standard cooling rate, the frequency of the compressor is increased.

4. The refrigerator according to claim 3, characterized in that: The controller is also configured to: When the real-time cooling rate is less than the preset standard cooling rate, the rotation speed of the air supply fan is increased.

5. The refrigerator according to claim 2, characterized in that: The controller is also configured to: Calculating the door-closing time of the refrigerating chamber in the closed state; When the door closing time reaches a preset door closing time threshold, the refrigeration startup temperature is lowered and the refrigeration shutdown temperature is increased until it is detected that the refrigeration chamber door is opened, and the initial refrigeration startup temperature and refrigeration shutdown temperature are restored.

6. A refrigerator control method, characterized in that: include: When it is detected that the compressor of the refrigerator is started, the ambient temperature and the current gear position of the refrigerator are obtained; Obtaining a corresponding cooling time according to the ambient temperature and the gear position, and obtaining a preset refrigeration shutdown temperature; When the real-time refrigeration temperature of the refrigerating chamber reaches the refrigeration shutdown temperature or the startup time of the compressor reaches the temperature reduction time, the compressor is controlled to shut down.

7. The refrigerator control method according to claim 6, characterized in that: The method further comprises: When it is detected that the compressor is stopped, obtaining the ambient temperature and the current gear position of the refrigerator; Obtaining a corresponding heating time according to the ambient temperature and the gear position, and obtaining a preset refrigeration startup temperature; When the real-time refrigeration temperature reaches the refrigeration startup temperature or the shutdown time of the compressor reaches the temperature-raising time, the compressor is controlled to start.

8. The refrigerator control method according to claim 6, characterized in that: The method further comprises: During the operation of the compressor, calculating the real-time cooling rate of the refrigerating chamber; When the real-time cooling rate is less than a preset standard cooling rate, the frequency of the compressor is increased.

9. The refrigerator control method according to claim 8, characterized in that: The method further comprises: When the real-time cooling rate is less than the preset standard cooling rate, the rotation speed of the air supply fan is increased.

10. The refrigerator control method according to claim 7, characterized in that: The method further comprises: Calculating the door-closing time of the refrigerating chamber in the closed state; When the door closing time reaches a preset door closing time threshold, the refrigeration startup temperature is lowered and the refrigeration shutdown temperature is increased until it is detected that the refrigeration chamber door is opened, and the initial refrigeration startup temperature and refrigeration shutdown temperature are restored.

Images