Refrigerator and control method thereof

Abstract

The invention discloses a refrigerator and a control method thereof. Firstly, the freezing temperature of a freezing chamber of the refrigerator is obtained; and then, when the refrigeration air door is in the closed state and the freezing temperature reaches the preset freezing refrigeration starting temperature, a compressor and / or a draught fan of the refrigerator are / is controlled to run at the preset high speed. Therefore, according to the embodiment of the invention, when the refrigeration air door is closed and the freezing temperature reaches the preset freezing refrigeration starting temperature, the compressor and / or the fan are / is controlled to operate at a high speed, and more cooling capacity is quickly transferred to the freezing chamber, so that the refrigeration duration of the freezing chamber can be shortened, and the cooling capacity transferred to the bottom of the refrigeration chamber in the refrigeration process of the freezing chamber is reduced; therefore, the risk that the temperature at the bottom of the refrigerating chamber is too low is reduced.

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] A core component of the refrigeration cycle of air-cooled refrigerators currently on the market is the fan's operation to transfer cold air. Specifically, the evaporator, a key component in the refrigeration system that generates cold air, first absorbs heat through the evaporation of the refrigerant, generating a low temperature. The fan then drives the air inside the refrigerator to flow across the evaporator. Once the air fully contacts the low-temperature evaporator, it picks up a significant amount of cold air and is subsequently transported to the refrigerator and freezer compartments.

[0003] However, most of the mainstream fans on the market currently adopt a fixed speed gear operation mode. This operation mode can easily cause the bottom of the refrigerator compartment to become too cold when the ambient temperature is low. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a refrigerator and a control method thereof, which can control the compressor and / or fan to operate at high speed when the refrigeration damper is closed and the freezing temperature reaches the preset freezing and refrigeration start temperature, thereby shortening the refrigeration time of the freezer compartment and reducing the amount of cold transferred from the freezer compartment to the bottom of the refrigerator compartment during refrigeration, thereby reducing the risk of overcooling at the bottom of the refrigerator compartment.

[0005] To achieve the above object, an embodiment of the present invention provides a refrigerator, comprising:

[0006] Compartments, including freezers and refrigerators, for storing items;

[0007] Refrigeration system, which powers the refrigerator's refrigeration cycle and includes a compressor, evaporator, pressure reducer, and condenser;

[0008] an air duct for introducing the cold energy generated by the refrigeration system into the compartment;

[0009] a fan, disposed in the air duct, for blowing the cooling air toward the compartment;

[0010] a refrigeration damper, provided on the air duct, for controlling the amount of cold air entering the refrigeration chamber;

[0011] A freezing temperature detection device, disposed in the freezing chamber, for detecting the freezing temperature;

[0012] Controller for:

[0013] obtaining the freezing temperature;

[0014] When the refrigeration damper is closed and it is detected that the freezing temperature reaches the preset freezing and refrigeration opening temperature, the compressor and / or the fan are controlled to operate at a preset high speed.

[0015] As an improvement to the above solution, the refrigerator includes an ambient temperature detection device, which is provided on the refrigerator housing and is used to detect the ambient temperature;

[0016] When the refrigeration damper is closed and it is detected that the freezing temperature reaches the preset freezing and refrigeration opening temperature, the compressor and / or the fan are controlled to operate at a preset high speed, including: when the ambient temperature is lower than a preset low temperature threshold, if the refrigeration damper is closed and it is detected that the freezing temperature reaches the preset freezing and refrigeration opening temperature, the compressor and / or the fan are controlled to operate at a preset high speed;

[0017] The controller is also used to: when the ambient temperature is not lower than the preset low temperature threshold, if the refrigeration damper is opened or the freezing temperature is detected to reach the preset freezing and refrigeration opening temperature, control the compressor and the fan to operate at a normal speed; wherein the preset high speed is greater than the normal speed.

[0018] As an improvement to the above solution, the refrigerator further comprises a refrigeration temperature detection device, which is provided in the refrigeration chamber and is used to detect the refrigeration temperature;

[0019] The controller is also used to: when it is detected that the refrigeration temperature reaches the preset refrigeration and cooling opening temperature, control the refrigeration damper to open, and control the compressor and / or the fan to operate at a preset low speed; wherein the preset high speed is greater than the preset low speed.

[0020] As an improvement to the above solution, the refrigerator includes an ambient temperature detection device, which is provided on the refrigerator housing and is used to detect the ambient temperature;

[0021] When it is detected that the refrigerated temperature reaches the preset refrigeration and refrigeration opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed, including: when the ambient temperature is lower than a preset low temperature threshold, if it is detected that the refrigerated temperature reaches the preset refrigeration and refrigeration opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed;

[0022] The controller is also used to: when the ambient temperature is not lower than the preset low temperature threshold, if it is detected that the refrigeration temperature reaches the preset refrigeration and cooling start-up temperature or the freezing temperature reaches the preset freezing and cooling start-up temperature, control the compressor and the fan to operate at a normal speed; wherein, the preset low speed is lower than the normal speed, and the normal speed is lower than the preset high speed, and the refrigeration damper opens when it is detected that the refrigeration temperature reaches the preset refrigeration and cooling start-up temperature.

[0023] As an improvement to the above solution, the refrigerator further comprises a refrigeration temperature detection device, which is provided in the refrigeration chamber and is used to detect the refrigeration temperature;

[0024] The controller is further configured to: when the refrigeration temperature does not reach the preset refrigeration and cooling start temperature, the refrigeration damper is in a closed state.

[0025] As an improvement to the above solution, the error between the preset low temperature threshold and 13 degrees Celsius is less than the set error value

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

[0027] Get the freezing temperature of the freezer compartment of the refrigerator;

[0028] When the refrigeration damper of the refrigerator is closed and the freezing temperature reaches a preset freezing and refrigeration opening temperature, the compressor and / or the fan of the refrigerator are controlled to operate at a preset high speed.

[0029] As an improvement to the above solution, when the refrigerator door is closed and the freezing temperature reaches a preset freezing and refrigeration opening temperature, controlling the compressor and / or fan of the refrigerator to operate at a preset high speed includes:

[0030] Obtaining the ambient temperature of the refrigerator;

[0031] When the ambient temperature is lower than a preset low temperature threshold, if the refrigeration damper is closed and it is detected that the freezing temperature reaches a preset freezing and refrigeration opening temperature, the compressor and / or the fan are controlled to operate at a preset high speed;

[0032] The method also includes: when the ambient temperature is not lower than the preset low temperature threshold, if the refrigeration damper is opened or the freezing temperature is detected to reach the preset freezing and refrigeration opening temperature, controlling the compressor and the fan to operate at a normal speed; wherein the preset high speed is greater than the normal speed.

[0033] As an improvement to the above solution, the following is also included:

[0034] Obtaining the refrigeration temperature of the refrigeration chamber of the refrigerator;

[0035] When it is detected that the refrigeration temperature reaches the preset refrigeration and cooling opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed; wherein the preset high speed is greater than the preset low speed.

[0036] As an improvement to the above solution, when it is detected that the refrigeration temperature reaches a preset refrigeration and cooling opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed, including:

[0037] Obtaining the ambient temperature of the refrigerator;

[0038] When the ambient temperature is lower than a preset low temperature threshold, if it is detected that the refrigeration temperature reaches a preset refrigeration opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed;

[0039] The method further comprises:

[0040] When the ambient temperature is not lower than the preset low temperature threshold, if it is detected that the refrigeration temperature reaches the preset refrigeration and cooling start-up temperature or the freezing temperature reaches the preset freezing and cooling start-up temperature, the compressor and the fan are controlled to operate at a normal speed; wherein, the preset low speed is lower than the normal speed, and the normal speed is lower than the preset high speed, and the refrigeration damper opens when it is detected that the refrigeration temperature reaches the preset refrigeration and cooling start-up temperature.

[0041] Compared to the prior art, the refrigerator and control method disclosed in the embodiments of the present invention first obtain the freezing temperature of the refrigerator's freezer compartment; then, when the refrigeration damper is closed and the freezing temperature reaches the preset freezing and refrigeration start-up temperature, the refrigerator's compressor and / or fan are controlled to operate at a preset high speed. Thus, the embodiments of the present invention control the compressor and / or fan to operate at a high speed when the refrigeration damper is closed and the freezing temperature reaches the preset freezing and refrigeration start-up temperature, thereby quickly transferring more cold air to the freezer compartment. This can shorten the freezing time of the freezer compartment and reduce the amount of cold air transferred to the bottom of the refrigerator compartment during the freezing process, thereby reducing the risk of overcooling at the bottom of the refrigerator compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a perspective view of a refrigerator provided by an embodiment of the present invention;

[0043] Figure 2 is a three-dimensional diagram of a refrigerator door provided by an embodiment of the present invention;

[0044] Figure 3 is a schematic structural diagram of a refrigeration system provided by an embodiment of the present invention;

[0045] Figure 4 is a structural diagram of a refrigerator provided by an embodiment of the present invention;

[0046] Figure 5 This is a first working flow diagram of the controller provided by an embodiment of the present invention;

[0047] Figure 6 is a second working flow diagram of the controller provided by an embodiment of the present invention;

[0048] Figure 7 Schematic diagram of cold air sinking into the refrigeration compartment when the refrigeration damper is closed according to an embodiment of the present invention;

[0049] Figure 8 Schematic diagram of cold air circulation in a refrigeration compartment when the refrigeration damper is open, according to an embodiment of the present invention;

[0050] Figure 9 is a third working flow diagram of the controller provided in an embodiment of the present invention;

[0051] Figure 10 is a fourth working flow diagram of the controller provided in an embodiment of the present invention;

[0052] Figure 11 It is a flowchart of a refrigerator control method provided by an embodiment of the present invention.

[0053] Among them, 100, box body, 200, door body, 210, door body shell, 220, door body liner, 230, upper end cover, 240, lower end cover; 1, compressor, 2, condenser, 3, anti-condensation tube, 4, drying filter, 5, pressure reducer, 6, evaporator, 7, gas-liquid separator, 8, fan, 11, cold storage chamber, 12, freezer chamber, 13, air duct, 14, cold storage damper, 111, cold storage temperature detection device, 121, freezer temperature detection device. DETAILED DESCRIPTION

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

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

[0056] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such 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 expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0058] See also Figure 1 , Figure 1 : is a perspective view of a refrigerator provided by an embodiment of the present invention. The refrigerator of this embodiment has an approximately rectangular parallelepiped shape. The refrigerator includes a box body 100 defining a storage space and a plurality of door bodies 200 provided at the opening of the box body 100. Figure 2 As shown, the door body 200 includes a door body shell 210 located outside the box body 100, a door body liner 220 located inside the box body 100, an upper end cover 230, a lower end cover 240, and an insulation layer located between the door body shell 210, the door body liner 220, the upper end cover 230, and the lower end cover 240; generally, the insulation layer is filled with foam. The box body 100 is provided with a chamber, wherein the chamber includes a component storage chamber for placing components in the refrigerator, such as a compressor, etc., and also includes a storage space for storing food, etc. Among them, the refrigerator in the embodiment of the present invention includes a refrigeration system, see Figure 3 The refrigeration system structure diagram shown in the figure is arranged in the component storage cavity, which is used to provide power for the refrigeration cycle of the refrigerator, including a compressor, evaporator, pressure reducer and condenser; the storage space can be divided into multiple compartments, which can be configured as refrigerators, freezers, etc. according to different uses. Each compartment corresponds to one or more doors, such as Figure 1 The upper compartment is provided with a double-door body, wherein 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.

[0059] See also Figure 3 , Figure 3Figure 1 is a schematic diagram of the structure of a refrigerator refrigeration system according to an embodiment of the present invention. The refrigeration system includes a compressor 1, a condenser 2, an anti-condensation tube 3, a filter drier 4, a pressure reducer 5, an evaporator 6, and a gas-liquid separator 7. The condenser 2, anti-condensation tube 3, and pressure reducer 5 all dissipate heat and are therefore referred to as a heat dissipation unit. The operating process of the refrigeration system includes compression, condensation, throttling, and evaporation.

[0060] Among them, combined Figure 3 The compression process is as follows: plug in the refrigerator power cord, when the thermostat contacts are connected, compressor 1 starts working, low-temperature, low-pressure refrigerant is sucked into compressor 1, compressed into high-temperature, high-pressure superheated gas in the compressor cylinder, and then discharged into condenser 2; the condensation process is as follows: the high-temperature, high-pressure refrigerant gas dissipates heat through condenser 2, the temperature continues to drop, and is gradually cooled to a saturated vapor at room temperature and high pressure, and 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: after The condensed refrigerant saturated liquid passes through a drying filter 4 to remove moisture and impurities, and then flows into a pressure reducer 5 (such as a capillary tube), where it is throttled and pressure-reduced, and the refrigerant becomes wet vapor at room temperature and low pressure. The evaporation process is as follows: the wet vapor at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 6, which not only lowers the temperature of the evaporator and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 6 passes through the gas-liquid separator 7 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 cooling.

[0061] like Figure 4 As shown, the refrigerator further includes a fan 8, an air duct 13 and a refrigeration damper 14 arranged on the air duct 13, and the compartments include a refrigeration compartment 11 and a freezer compartment 12. The fan 8 allows air to continuously enter the fins of the evaporator 6 for heat exchange, and at the same time sends the air that becomes cold after the evaporator 6 absorbs heat to the refrigeration compartment 11 and the freezer compartment 12 through the air duct 13, so that the air in the storage room continuously circulates to achieve the purpose of lowering the temperature; wherein, the amount of cold entering the refrigeration compartment 11 is controlled by controlling the opening of the refrigeration damper 14. A refrigeration temperature detection device 111 is provided on the inner wall of the refrigeration compartment 11, for detecting the refrigeration temperature of the refrigeration compartment 11; a freezing temperature detection device 121 is provided on the inner wall of the freezer compartment 12, for detecting the freezing temperature of the freezer compartment 12. The refrigeration temperature detection device 111 and the freezing temperature detection device 121 can be temperature sensors, whose probes are exposed to the storage space of the compartment in which they are located, for detecting the temperature of the compartment in which they are located. The structure of the refrigerator is not limited to Figure 4The specific structure of the refrigeration temperature detection device 111 and the freezing temperature detection device 121 is not limited to the number of 1, can also be 2, 3, etc., the installation position of the refrigeration temperature detection device 111 and the freezing temperature detection device 121 is not limited to Figure 4 The setting can be on the upper wall, lower wall, left wall, right wall, etc. in the compartment. The number of refrigeration dampers is not limited to 1, and can also be 2, 3, etc. The position of the refrigeration damper is not limited to the above specific positions. It can be set between the air supply port of the freezer closest to the refrigeration room and the air supply port of the refrigeration room closest to the freezer, or it can be set at the air supply port of the refrigeration room. It is only necessary to ensure that the refrigeration damper can prevent cold air from entering the refrigeration room when it is fully closed under ideal conditions. The refrigerator shell is provided with an ambient temperature detection device (not shown in the figure) for detecting the ambient temperature. The refrigeration temperature detection device, the freezing temperature detection device and the ambient temperature detection device can be temperature sensors, or other devices that can be used to detect temperature, which are not limited here.

[0062] It's worth noting that a temperature sensor is a sensor that senses temperature and converts it into a usable output signal. Based on the measurement method, they can be categorized as contact and non-contact. Based on the sensor material and electronic component characteristics, they can be divided into thermal resistors and thermocouples. Manufacturers can select specific temperature sensor types based on actual application requirements. The specific type and installation location of ambient temperature detection devices and freezer temperature detection devices can be determined based on actual needs and are not specified here.

[0063] Specifically, the refrigerator also includes a controller. In an embodiment of the present invention, the controller is electrically connected to each of the above-mentioned controllable devices, and the controller is configured to: obtain the freezing temperature; when the refrigeration damper is closed and it is detected that the freezing temperature reaches the preset freezing and refrigeration opening temperature, control the compressor and / or the fan to operate at a preset high speed.

[0064] For example, see Figure 5 , Figure 5 : is a first working flow diagram of a controller provided in an embodiment of the present invention, wherein the controller is configured to execute steps S11 to S13:

[0065] S11. Obtain the freezing temperature of the freezing chamber, and then proceed to step S12.

[0066] Specifically, the real-time temperature collected by the freezing temperature detection device is read, and the temperature is the freezing temperature.

[0067] S12. Determine whether the refrigeration damper is closed and whether the freezing temperature reaches the preset freezing and refrigeration opening temperature. If so, enter step S13. If not, enter other control logics, such as steps S20-S22 or S23-S28.

[0068] Specifically, in refrigerator control, the opening and closing of the refrigerator damper is usually controlled based on the refrigerator compartment's refrigeration temperature. For example, when the refrigerator compartment is not in the cooling stage, if the refrigeration temperature reaches the preset refrigeration and cooling start temperature, the refrigeration damper is controlled to open, and the compressor and fan are controlled to operate. The fan sends the cooling energy generated by the evaporator into the refrigerator compartment through the air supply vent, causing the refrigerator compartment temperature to drop. Until the refrigeration temperature reaches the preset refrigeration and cooling stop temperature, the refrigeration vent is controlled to close, stopping the cooling supply to the refrigerator compartment. Generally, the preset refrigeration and cooling stop temperature is lower than the preset refrigeration and cooling start temperature to avoid frequent opening and closing of the refrigeration damper, thereby ensuring cooling efficiency and equipment life.

[0069] For example, if the refrigerated temperature reaches a preset refrigeration start temperature, the refrigeration damper is controlled to open. If the refrigerated temperature reaches a preset refrigeration stop temperature, the refrigeration damper is controlled to close. Therefore, whether the refrigeration damper is closed can be determined based on the refrigeration temperature. Alternatively, a damper opening and closing status monitoring device can be provided at the refrigeration damper to determine whether the refrigeration damper is open or closed. Alternatively, when controlling the refrigeration damper, the refrigeration damper status can be stored in a memory, and the refrigeration damper status value stored in the memory can be read to determine whether the refrigeration damper is open or closed.

[0070] S13: Control the compressor and / or the fan to operate at a preset high speed.

[0071] Optionally, one of the compressor and the fan is controlled to run at high speed and the other is controlled to run at normal speed; or both the compressor and the fan are controlled to run at high speed.

[0072] For example, the refrigerator's control logic predefines a correspondence between compressor speed and cooling gear, as well as a correspondence between fan speed and cooling gear. Generally, the compressor and fan speeds are controlled based on the selected cooling gear. Cooling from the freezer compartment can be transferred to the refrigerator compartment. During the freezer cooling process, the temperature at the top of the freezer compartment is lower, resulting in a higher amount of cooling being transferred to the refrigerator compartment. However, after the freezer compartment stops cooling, the air inside the freezer compartment experiences natural convection, with cool air sinking and warm air rising. Consequently, the air inside the freezer compartment exhibits a higher temperature at the top and a lower temperature at the bottom. Consequently, relatively less cooling is transferred to the refrigerator compartment. Therefore, in order to reduce the temperature at the bottom of the refrigerator compartment from being too cold, this can be achieved by reducing the amount of cold that is transferred from the freezer compartment to the refrigerator compartment. Specifically, when the refrigerator compartment has no cooling demand and the freezing temperature of the freezer compartment reaches the preset freezing and refrigeration start-up temperature, the refrigeration air vent is closed, and the compressor and / or fan are controlled to run at high speed, and a large amount of cold is sent into the freezer compartment from the air supply vent of the freezer compartment, so that the temperature of the freezer compartment drops rapidly until the freezing temperature reaches the preset freezing and refrigeration stop temperature, and the fan and compressor are controlled to stop running, which shortens the time that the freezer compartment transfers a large amount of cold to the refrigerator compartment, thereby reducing the amount of cold that is transferred from the freezer compartment to the refrigerator compartment and reducing the risk of the bottom temperature of the refrigerator compartment being too low; wherein, the preset freezing and refrigeration stop temperature is less than or equal to the preset freezing and refrigeration start-up temperature.

[0073] Compared with the prior art, this embodiment controls the compressor and / or fan to operate at high speed when the refrigeration damper is closed and the freezing temperature reaches the preset freezing and refrigeration start-up temperature, thereby shortening the refrigeration time of the freezer compartment and reducing the amount of cold transferred from the freezer compartment to the bottom of the refrigerator compartment during refrigeration, thereby reducing the risk of overcooling at the bottom of the refrigerator compartment.

[0074] In a preferred embodiment, when the refrigeration damper is closed and the freezing temperature is detected to have reached a preset freezing and refrigeration start-up temperature, the compressor and / or the fan are controlled to operate at a preset high speed, including: when the ambient temperature is lower than a preset low temperature threshold, if the refrigeration damper is closed and the freezing temperature is detected to have reached a preset freezing and refrigeration start-up temperature, the compressor and / or the fan are controlled to operate at a preset high speed; the controller is also used for: when the ambient temperature is not lower than the preset low temperature threshold, if the refrigeration damper is opened or the freezing temperature is detected to have reached a preset freezing and refrigeration start-up temperature, the compressor and the fan are controlled to operate at a normal speed; wherein, the preset high speed is greater than the normal speed.

[0075] Specifically, this embodiment further defines the control logic of the compressor and / or fan. Figure 6 , Figure 6is a second working flow diagram of the controller provided in an embodiment of the present invention, wherein the controller is further configured to execute steps S14 to S19:

[0076] S14. Obtain the freezing temperature of the freezing chamber and the ambient temperature of the refrigerator, and then proceed to step S15.

[0077] Specifically, the real-time temperature collected by the freezing temperature detection device is read, which is the freezing temperature; and the real-time temperature collected by the ambient temperature detection device is obtained, which is the ambient temperature.

[0078] S15: Determine whether the ambient temperature is lower than a preset low temperature threshold. If so, proceed to step S16; if not, proceed to step S18.

[0079] S16: Determine whether the refrigeration damper is closed and whether the freezing temperature reaches the preset freezing and refrigeration opening temperature. If so, proceed to step S17; if not, proceed to other control logics, such as steps S20 to S22.

[0080] S17. Control the compressor and / or fan to operate at a preset high speed.

[0081] S18. Determine whether the refrigeration damper is open or whether the freezing temperature reaches the preset freezing and refrigeration opening temperature. If so, proceed to step S19. If not, proceed to other control logics, such as steps S20 to S22.

[0082] S19. Control the compressor and fan to operate at normal speed.

[0083] Specifically, when the ambient temperature is too low, the real-time temperature of the refrigerator compartment is not easy to rise to the preset refrigeration and cooling start-up temperature. Therefore, the refrigerator compartment is in a natural convection state for a longer time, and the temperature at the bottom of the refrigerator compartment is more likely to be too cold. When the ambient temperature is high, the real-time temperature of the refrigerator compartment is easily affected by the ambient temperature and rises to the preset refrigeration and cooling start-up temperature. Therefore, the refrigerator needs to supply cold air to the refrigerator compartment more frequently, and the air inside the refrigerator compartment is in a circulating state, which causes the temperature at the bottom of the refrigerator compartment to rise. Therefore, the temperature at the bottom of the refrigerator compartment is usually not too cold. The schematic diagram of the cold air sinking in the refrigerator compartment when the refrigeration damper is closed can be seen in Figure 7 , the schematic diagram of the cold air circulation in the refrigerator compartment when the refrigeration damper is open can be found in Figure 8This embodiment controls the fan and / or compressor to operate at high speed when the ambient temperature is low, the refrigeration damper is closed, and the freezing temperature reaches the preset freezing and refrigeration start-up temperature (i.e., when the freezer compartment needs to be cooled separately). This shortens the time it takes for the freezer compartment to transfer a large amount of cold air to the refrigerator compartment, thereby reducing the amount of cold air transferred from the freezer compartment to the refrigerator compartment and reducing the risk of the bottom temperature of the refrigerator compartment being too low. When the ambient temperature is high, if the refrigeration damper is open (i.e., there is a need for cooling the refrigerator compartment) or the freezing temperature reaches the preset freezing and refrigeration start-up temperature (i.e., there is a need for cooling the freezer compartment), the compressor and fan are controlled to operate at normal speed, thereby reducing refrigerator noise.

[0084] It is worth noting that the specific value of the preset low temperature threshold can be set according to actual conditions, such as 12 degrees Celsius, 13 degrees Celsius or 14 degrees Celsius, etc., and is not limited here.

[0085] In a preferred embodiment, the controller is also used to: when it is detected that the refrigeration temperature reaches a preset refrigeration and cooling opening temperature, control the refrigeration damper to open, and control the compressor and / or the fan to operate at a preset low speed; wherein the preset high speed is greater than the preset low speed.

[0086] Specifically, this embodiment further defines the control logic of the compressor and / or fan. Figure 9 , Figure 9 is a third working flow diagram of the controller provided in an embodiment of the present invention, wherein the controller is further configured to execute steps S20 to S22:

[0087] S20, obtain the refrigeration temperature of the refrigeration chamber, and then enter step S21.

[0088] Specifically, the real-time temperature collected by the refrigeration temperature detection device is read, and the temperature is the refrigeration temperature.

[0089] S21. Determine whether the refrigeration temperature reaches the preset refrigeration and cooling start temperature. If so, proceed to step S22. If not, proceed to other control logics, such as steps S11 to S13 or S14 to S19.

[0090] S22: Control the compressor and / or the fan to operate at a preset low speed.

[0091] Optionally, one of the compressor and the fan is controlled to run at a low speed, and the other is controlled to run at a normal speed; or both the compressor and the fan are controlled to run at a low speed.

[0092] Specifically, the refrigerator's control logic predefines the correspondence between compressor speed and cooling gear, as well as between fan speed and cooling gear. Under normal circumstances, compressor and fan speed control are determined by the selected cooling gear. When the refrigerator is cooling the refrigerator compartment, air circulates inside, making it less likely for the bottom of the compartment to overcool. However, after cooling is stopped, natural convection causes the cold air inside the compartment to sink and the hot air to rise. This results in higher temperatures at the top and lower temperatures at the bottom, making it more likely for the bottom of the compartment to overcool. Therefore, in order to reduce the risk of the temperature at the bottom of the refrigerator compartment being too cold, when there is a cooling demand in the refrigerator compartment (that is, the refrigeration temperature reaches the preset refrigeration and cooling start temperature), the refrigeration air vent is controlled to open, and the compressor and / or fan are controlled to run at a low speed, and a small amount of cold air is sent from the air supply vent of the refrigerator compartment into the freezer compartment, so that the temperature of the refrigerator compartment slowly drops until the refrigeration temperature reaches the preset refrigeration and cooling stop temperature, and the refrigeration air vent is controlled to close, which extends the time for the air circulation inside the refrigerator compartment, thereby reducing the risk of the temperature at the bottom of the refrigerator compartment being too low.

[0093] In a preferred embodiment, when it is detected that the refrigeration temperature reaches a preset refrigeration and refrigeration opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed, including: when the ambient temperature is lower than a preset low temperature threshold, if it is detected that the refrigeration temperature reaches the preset refrigeration and refrigeration opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed; the controller is also used for: when the ambient temperature is not lower than the preset low temperature threshold, if it is detected that the refrigeration temperature reaches the preset refrigeration and refrigeration opening temperature or the freezing temperature reaches the preset freezing and refrigeration opening temperature, controlling the compressor and the fan to operate at a normal speed; wherein, the preset low speed is less than the normal speed, the normal speed is less than the preset high speed, and the refrigeration damper is opened when it is detected that the refrigeration temperature reaches the preset refrigeration and refrigeration opening temperature.

[0094] Specifically, this embodiment further defines the control logic of the compressor and / or fan. Figure 10 , Figure 10 is a fourth working flow diagram of the controller provided in an embodiment of the present invention, wherein the controller is further configured to execute steps S23 to S28:

[0095] S23, obtain the freezing temperature of the freezing chamber, the refrigerating temperature of the refrigerating chamber and the ambient temperature of the refrigerator, and then enter step S24.

[0096] Specifically, the real-time temperature collected by the freezing temperature detection device is read, which is the freezing temperature; the real-time temperature collected by the ambient temperature detection device is read, which is the ambient temperature; and the real-time temperature collected by the refrigeration temperature detection device is read, which is the refrigeration temperature.

[0097] S24: Determine whether the ambient temperature is lower than a preset low temperature threshold. If so, proceed to step S25; if not, proceed to step S27.

[0098] S25. Determine whether the refrigeration temperature reaches the preset refrigeration and cooling start temperature. If so, proceed to step S26. If not, proceed to other control logics, such as steps S11 to S13, S14 to S19, or S20 to S22.

[0099] S26. Control the compressor and / or fan to operate at a preset low speed.

[0100] Optionally, one of the compressor and the fan is controlled to run at a low speed, and the other is controlled to run at a normal speed; or, both the compressor and the fan are controlled to run at a low speed.

[0101] S27. Determine whether the refrigeration damper is open or whether the freezing temperature reaches the preset freezing and refrigeration opening temperature. If so, proceed to step S28. If not, proceed to other control logics, such as steps S11 to S13, S14 to S19, or S20 to S22.

[0102] S28. Control the compressor and fan to operate at normal speed.

[0103] Specifically, when the ambient temperature is too low, the real-time temperature of the refrigerator compartment is not easy to rise to the preset refrigeration and cooling start temperature. Therefore, the refrigerator compartment is in a natural convection state for a longer time, and the bottom temperature of the refrigerator compartment is more likely to be too cold. When the ambient temperature is high, the real-time temperature of the refrigerator compartment is easily affected by the ambient temperature and rises to the preset refrigeration and cooling start temperature. Therefore, the refrigerator needs to supply cold air to the refrigerator compartment more frequently, and the air inside the refrigerator compartment is in a circulating state, which causes the bottom temperature of the refrigerator compartment to rise. Therefore, the bottom temperature of the refrigerator compartment usually does not become too cold. This embodiment controls the refrigeration damper to open and the fan and / or compressor to operate at a low speed when there is a cooling demand in the refrigerator compartment under low ambient temperature, so that a small amount of cold air is sent from the air supply port of the refrigerator compartment to the freezer compartment, so that the temperature of the refrigerator compartment slowly decreases until the refrigeration temperature reaches the preset refrigeration and cooling stop temperature. The refrigeration air port is then controlled to close, thereby extending the time for the air circulation inside the refrigerator compartment, thereby reducing the risk of the bottom temperature of the refrigerator compartment being too low. When the ambient temperature is high, if there is a need for cooling in the refrigerator or freezer, the compressor and fan are controlled to run at normal speed, reducing the noise of the refrigerator.

[0104] It is worth noting that the specific value of the preset low temperature threshold can be set according to actual conditions, such as 12 degrees Celsius, 13 degrees Celsius or 14 degrees Celsius, etc., and is not limited here.

[0105] In a preferred embodiment, the controller is further configured to: when the refrigeration temperature has not reached the preset refrigeration and cooling start temperature, the refrigeration damper is in a closed state. Preferably, when the refrigeration compartment is not in the refrigeration stage, if the refrigeration temperature reaches the preset refrigeration and cooling start temperature, the refrigeration damper is controlled to open, and the compressor and fan are controlled to operate until the refrigeration temperature reaches the preset refrigeration and cooling stop temperature, at which point the refrigeration air outlet is controlled to close, stopping the cooling supply to the refrigeration compartment. The preset refrigeration and cooling stop temperature is less than or equal to the preset refrigeration and cooling start temperature.

[0106] In a preferred embodiment, the error between the preset low temperature threshold and 13 degrees Celsius is less than a set error value. That is, the preset low temperature threshold is set around 13 degrees Celsius. The specific value can be set according to actual conditions and is not limited here.

[0107] Compared to the prior art, the refrigerator disclosed in the embodiment of the present invention first obtains the freezing temperature of the refrigerator's freezer compartment; then, when the refrigeration damper is closed and the freezing temperature reaches the preset freezing and refrigeration start-up temperature, the refrigerator's compressor and / or fan are controlled to operate at a preset high speed. Thus, the embodiment of the present invention controls the compressor and / or fan to operate at a high speed when the refrigeration damper is closed and the freezing temperature reaches the preset freezing and refrigeration start-up temperature, thereby quickly transferring more cold air to the freezer compartment. This can shorten the freezing time of the freezer compartment and reduce the amount of cold air transferred to the bottom of the refrigerator compartment during the freezing process, thereby reducing the risk of overcooling at the bottom of the refrigerator compartment.

[0108] See also Figure 11 , Figure 11 1 is a flow chart of a refrigerator control method provided by an embodiment of the present invention. The refrigerator control method according to the embodiment of the present invention is implemented by a controller in the refrigerator, and includes steps S1 to S2:

[0109] S1. Obtain the freezing temperature of the freezer compartment of the refrigerator;

[0110] S2. When the refrigeration damper of the refrigerator is closed and the freezing temperature reaches a preset freezing and refrigeration opening temperature, the compressor and / or fan of the refrigerator is controlled to operate at a preset high speed.

[0111] In one embodiment, when the refrigeration damper of the refrigerator is closed and the freezing temperature reaches a preset freezing and refrigeration opening temperature, controlling the compressor and / or fan of the refrigerator to operate at a preset high speed includes:

[0112] Obtaining the ambient temperature of the refrigerator;

[0113] When the ambient temperature is lower than a preset low temperature threshold, if the refrigeration damper is closed and it is detected that the freezing temperature reaches a preset freezing and refrigeration opening temperature, the compressor and / or the fan are controlled to operate at a preset high speed;

[0114] The method also includes: when the ambient temperature is not lower than the preset low temperature threshold, if the refrigeration damper is opened or the freezing temperature is detected to reach the preset freezing and refrigeration opening temperature, controlling the compressor and the fan to operate at a normal speed; wherein the preset high speed is greater than the normal speed.

[0115] In one embodiment, the method further comprises:

[0116] Obtaining the refrigeration temperature of the refrigeration chamber of the refrigerator;

[0117] When it is detected that the refrigeration temperature reaches the preset refrigeration and cooling opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed; wherein the preset high speed is greater than the preset low speed.

[0118] In one embodiment, when it is detected that the refrigeration temperature reaches a preset refrigeration and cooling opening temperature, controlling the refrigeration damper to open, and controlling the compressor and / or the fan to operate at a preset low speed, includes:

[0119] Obtaining the ambient temperature of the refrigerator;

[0120] When the ambient temperature is lower than a preset low temperature threshold, if it is detected that the refrigeration temperature reaches a preset refrigeration opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed;

[0121] The method further comprises:

[0122] When the ambient temperature is not lower than the preset low temperature threshold, if it is detected that the refrigeration temperature reaches the preset refrigeration and cooling start-up temperature or the freezing temperature reaches the preset freezing and cooling start-up temperature, the compressor and the fan are controlled to operate at a normal speed; wherein, the preset low speed is lower than the normal speed, and the normal speed is lower than the preset high speed, and the refrigeration damper opens when it is detected that the refrigeration temperature reaches the preset refrigeration and cooling start-up temperature.

[0123] It is worth noting that the specific steps of the refrigerator control method described in the above embodiment can be found in the working process of the refrigerator in the above embodiment, and will not be described in detail here.

[0124] Compared to the prior art, the refrigerator control method disclosed in the embodiment of the present invention first obtains the freezing temperature of the refrigerator's freezer compartment; then, when the refrigeration damper is closed and the freezing temperature reaches the preset freezing and refrigeration start-up temperature, the refrigerator's compressor and / or fan are controlled to operate at a preset high speed. Thus, the embodiment of the present invention controls the compressor and / or fan to operate at a high speed when the refrigeration damper is closed and the freezing temperature reaches the preset freezing and refrigeration start-up temperature, thereby quickly transferring more cold air to the freezer compartment. This can shorten the freezing time of the freezer compartment and reduce the amount of cold air transferred to the bottom of the refrigerator compartment during the freezing process, thereby reducing the risk of overcooling at the bottom of the refrigerator compartment.

[0125] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles 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: Compartments, including freezers and refrigerators, for storing items; Refrigeration system, which powers the refrigerator's refrigeration cycle and includes a compressor, evaporator, pressure reducer, and condenser; an air duct for introducing the cooling energy generated by the refrigeration system into the compartment; a fan, disposed in the air duct, for blowing the cooling air toward the compartment; a refrigeration damper, provided on the air duct, for controlling the amount of cold air entering the refrigeration chamber; A freezing temperature detection device, disposed in the freezing chamber, for detecting the freezing temperature; Controller for: obtaining the freezing temperature; When the refrigeration damper is closed and it is detected that the freezing temperature reaches the preset freezing and refrigeration opening temperature, the compressor and / or the fan are controlled to operate at a preset high speed.

2. The refrigerator according to claim 1, wherein The refrigerator includes an ambient temperature detection device, which is provided on the refrigerator housing and is used to detect the ambient temperature; When the refrigeration damper is closed and it is detected that the freezing temperature reaches the preset freezing and refrigeration opening temperature, the compressor and / or the fan are controlled to operate at a preset high speed, including: when the ambient temperature is lower than a preset low temperature threshold, if the refrigeration damper is closed and it is detected that the freezing temperature reaches the preset freezing and refrigeration opening temperature, the compressor and / or the fan are controlled to operate at a preset high speed; The controller is also used to: when the ambient temperature is not lower than the preset low temperature threshold, if the refrigeration damper is opened or the freezing temperature is detected to reach the preset freezing and refrigeration opening temperature, control the compressor and the fan to operate at a normal speed; wherein the preset high speed is greater than the normal speed.

3. The refrigerator according to claim 1, wherein The refrigerator further comprises a refrigeration temperature detection device, which is arranged in the refrigeration chamber and is used to detect the refrigeration temperature; The controller is also used to: when it is detected that the refrigeration temperature reaches the preset refrigeration and cooling opening temperature, control the refrigeration damper to open, and control the compressor and / or the fan to operate at a preset low speed; wherein the preset high speed is greater than the preset low speed.

4. The refrigerator according to claim 3, wherein The refrigerator includes an ambient temperature detection device, which is provided on the refrigerator housing and is used to detect the ambient temperature; When it is detected that the refrigerated temperature reaches the preset refrigeration and refrigeration opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed, including: when the ambient temperature is lower than a preset low temperature threshold, if it is detected that the refrigerated temperature reaches the preset refrigeration and refrigeration opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed; The controller is also used to: when the ambient temperature is not lower than the preset low temperature threshold, if it is detected that the refrigeration temperature reaches the preset refrigeration and cooling start-up temperature or the freezing temperature reaches the preset freezing and cooling start-up temperature, control the compressor and the fan to operate at a normal speed; wherein, the preset low speed is lower than the normal speed, and the normal speed is lower than the preset high speed, and the refrigeration damper opens when it is detected that the refrigeration temperature reaches the preset refrigeration and cooling start-up temperature.

5. The refrigerator according to claim 1, wherein The refrigerator further comprises a refrigeration temperature detection device, which is arranged in the refrigeration chamber and is used to detect the refrigeration temperature; The controller is further configured to: when the refrigeration temperature does not reach the preset refrigeration and cooling start temperature, the refrigeration damper is in a closed state.

6. The refrigerator according to claim 2 or 4, characterized in that: The error between the preset low temperature threshold and thirteen degrees Celsius is less than a set error value.

7. A refrigerator control method, characterized in that: include: Get the freezing temperature of the freezer compartment of the refrigerator; When the refrigeration damper of the refrigerator is closed and the freezing temperature reaches a preset freezing and refrigeration opening temperature, the compressor and / or the fan of the refrigerator are controlled to operate at a preset high speed.

8. The refrigerator control method according to claim 7, wherein: When the refrigeration damper of the refrigerator is closed and the freezing temperature reaches a preset freezing and refrigeration opening temperature, controlling the compressor and / or fan of the refrigerator to operate at a preset high speed includes: Obtaining the ambient temperature of the refrigerator; When the ambient temperature is lower than a preset low temperature threshold, if the refrigeration damper is closed and it is detected that the freezing temperature reaches a preset freezing and refrigeration opening temperature, the compressor and / or the fan are controlled to operate at a preset high speed; The method also includes: when the ambient temperature is not lower than the preset low temperature threshold, if the refrigeration damper is opened or the freezing temperature is detected to reach the preset freezing and refrigeration opening temperature, controlling the compressor and the fan to operate at a normal speed; wherein the preset high speed is greater than the normal speed.

9. The refrigerator control method according to claim 7, wherein: Also includes: Obtaining the refrigeration temperature of the refrigeration chamber of the refrigerator; When it is detected that the refrigeration temperature reaches the preset refrigeration and cooling opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed; wherein the preset high speed is greater than the preset low speed.

10. The refrigerator according to claim 9, wherein When it is detected that the refrigeration temperature reaches a preset refrigeration and cooling opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed, including: Obtaining the ambient temperature of the refrigerator; When the ambient temperature is lower than a preset low temperature threshold, if it is detected that the refrigeration temperature reaches a preset refrigeration opening temperature, the refrigeration damper is controlled to open, and the compressor and / or the fan are controlled to operate at a preset low speed; The method further comprises: When the ambient temperature is not lower than the preset low temperature threshold, if it is detected that the refrigeration temperature reaches the preset refrigeration and cooling start-up temperature or the freezing temperature reaches the preset freezing and cooling start-up temperature, the compressor and the fan are controlled to operate at a normal speed; wherein, the preset low speed is lower than the normal speed, and the normal speed is lower than the preset high speed, and the refrigeration damper opens when it is detected that the refrigeration temperature reaches the preset refrigeration and cooling start-up temperature.

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