Refrigerator

Abstract

The refrigerator comprises a refrigerator body, a refrigerating system and a controller, and the controller is connected with an air door and is configured as follows: when the temperature of a freezing chamber is lower than a preset freezing refrigerating temperature, the air door is controlled to be opened in response to a refrigerating request of a refrigerating chamber; when the opening duration of the air door reaches a first preset duration, the temperature of the refrigerating chamber does not reach a preset refrigerating temperature and the temperature of the freezing chamber rises to a preset freezing refrigerating temperature, the air door is controlled to be closed, and a refrigerating system is controlled to refrigerate the freezing chamber; when the temperature of the freezing chamber is reduced to the preset heat exchange refrigeration temperature, the air door is controlled to be opened until the temperature of the refrigerating chamber is reduced to the preset refrigerating temperature, the air door is controlled to be closed, and the preset heat exchange refrigeration temperature is lower than the preset freezing refrigeration temperature. According to the refrigerator, the opening frequency of the air door is reduced while refrigeration of the refrigerating chamber and the freezing chamber is guaranteed, so that the noise problem caused by frequent opening of the air door is effectively reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a refrigerator. Background Art

[0002] At present, for refrigerators including a refrigerator compartment and a freezer compartment, the freezer compartment is cooled by coolant to reduce the temperature to below the set freezing temperature. When the refrigerator compartment has a cooling demand, the damper that controls the heat exchange between the freezer compartment and the refrigerator compartment will open to diffuse the cold air in the freezer compartment to the refrigerator compartment to cool the refrigerator compartment.

[0003] However, during the refrigeration process of the refrigerator compartment, due to the heat exchange between the freezer compartment and the refrigerator compartment, the temperature of the freezer compartment will gradually increase due to the loss of cold air. When the temperature of the refrigerator compartment has not yet dropped to the set refrigeration temperature, and the temperature of the freezer compartment rises to above the set freezing temperature, the damper will be closed to give priority to cooling the freezer compartment. After the temperature of the freezer compartment drops below the set freezing temperature, the damper will be reopened to cool the refrigerator compartment. This cycle repeats itself, and during the refrigeration process of the refrigerator compartment, the damper will be opened and closed many times, and the frequent opening and closing of the damper will produce large noise fluctuations, thus affecting the user experience. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a refrigerator that reduces the number of times the damper is opened while ensuring refrigeration of the refrigerator compartment and the freezer compartment, thereby effectively reducing the noise problem caused by frequent opening of the damper and improving the user experience.

[0005] In order to achieve the above-mentioned object, a refrigerator according to a first aspect of the present invention comprises: a box body, wherein the box body defines a refrigerating chamber and a freezing chamber, a heat exchange channel is arranged between the freezing chamber and the refrigerating chamber, and a damper is arranged on the heat exchange channel, and the damper is used to control the opening and closing of the heat exchange channel between the freezing chamber and the refrigerating chamber; a refrigeration system, wherein the refrigeration system is used to refrigerate the freezing chamber; a controller, wherein the controller is connected to the damper, and the controller is configured to: when the temperature of the freezing chamber is lower than a preset freezing and refrigerating temperature, in response to a refrigeration request of the refrigerating chamber, control the damper to open; when the opening time of the damper reaches a first preset time, the temperature of the refrigerating chamber does not reach the preset refrigerating temperature, and the temperature of the freezing chamber rises to the preset freezing and refrigerating temperature, control the damper to close, and control the refrigerating system to refrigerate the freezing chamber; when the temperature of the freezing chamber drops to a preset heat exchange refrigerating temperature, control the damper to open until the temperature of the refrigerating chamber drops to a preset refrigerating temperature, and control the damper to close, wherein the preset heat exchange refrigerating temperature is lower than the preset freezing and refrigerating temperature.

[0006] According to the refrigerator of the embodiment of the present invention, based on the setting that the preset heat exchange refrigeration temperature is lower than the preset freezing refrigeration temperature, when the temperature of the freezer compartment is lower than the preset freezing refrigeration temperature, the refrigerator responds to the refrigeration request of the refrigerator compartment and controls the damper to open. When the damper opening time reaches the first preset time and the temperature of the refrigerator compartment does not reach the preset refrigeration temperature and the temperature of the freezer compartment rises to the preset freezing refrigeration temperature, the damper is controlled to close, and the refrigeration system is started to refrigerate the freezer compartment. After the temperature of the freezer compartment drops below the preset heat exchange refrigeration temperature, it means that the temperature of the freezer compartment is low enough. At this time, by controlling the damper to open, the temperature of the refrigerator compartment can be reduced to the preset refrigeration temperature at one time, and then the damper is closed. This control method can greatly reduce the frequency of damper switching, and effectively reduce the noise problem caused by the frequent opening of the damper. At the same time, reducing the frequent opening and closing of the damper can make the cold air delivery of the refrigerator compartment more efficient, thereby effectively shortening the refrigeration time of the refrigerator compartment and reducing the total opening time of the damper, thereby not only reducing noise, but also reducing energy consumption and improving the user experience.

[0007] In some embodiments, the refrigeration system includes a compressor, and the refrigerator also includes a fan; the controller is also configured to: in a first operating mode, when there is a compressor variable frequency speed within a speed range of (the current operating speed of the fan ± a preset speed), control the speed of the compressor to be reduced by a first amplitude, and the first amplitude is greater than or equal to the preset speed.

[0008] The above technical solution has the following advantages or beneficial effects: by controlling the speed of the compressor to reduce the first amplitude, it avoids the resonance range of the current operating speed of the fan, thereby avoiding the resonant coupling between the fan and the compressor, reducing noise and improving user experience.

[0009] In some embodiments, the controller is further configured to: record the duration of the operation of the compressor at the speed reduced by the first amplitude, and when the duration of the operation of the compressor at the speed reduced by the first amplitude reaches a second preset duration and the refrigerator is not shut down, control the speed of the compressor to increase by a second amplitude, and control the compressor to operate at the speed increased by the second amplitude until the refrigerator shuts down, and the second amplitude is greater than or equal to twice the preset speed.

[0010] The above technical solution has the following advantages or beneficial effects: by setting the second amplitude to be greater than or equal to twice the preset speed, it is possible to ensure that the adjusted operating speed of the compressor does not fall into the resonance interval of "current fan speed ± preset speed", thereby avoiding the resonance coupling between the compressor and the fan. At the same time, by significantly increasing the speed of the compressor, it is helpful to quickly restore the refrigeration efficiency and make up for the insufficient refrigeration during the low-speed operation of the compressor.

[0011] In some embodiments, the refrigeration system includes a compressor, the refrigerator also includes a fan, and the controller is further configured to: in a second operating mode, when the current operating speed of the fan exists within the speed range of (the speed of the compressor ± the preset speed), control the current operating speed of the fan to be adjusted to a first fan speed, wherein the first fan speed is the difference between the speed of the compressor and the first amplitude, and the first amplitude is greater than or equal to the preset speed.

[0012] The above technical solution has the following advantages or beneficial effects: by controlling the current operating speed of the fan to be adjusted to the first fan speed, the fan avoids the resonance range of the compressor speed, thereby effectively avoiding the resonance coupling between the fan and the compressor, which not only reduces the noise of the refrigerator, but also improves the stability and comfort of the refrigerator operation.

[0013] In some embodiments, the controller is further configured to: record the length of time the fan runs at the first fan speed, and when the length of time the fan runs at the first fan speed reaches a third preset length of time and the refrigerator is not shut down, control the fan to adjust to a second fan speed, wherein the second fan speed is the sum of the compressor speed and the first amplitude.

[0014] The above technical solution has the following advantages or beneficial effects: by controlling the fan to adjust to the second fan speed, it can ensure that the adjusted operating speed of the fan does not fall into the resonance range of "compressor speed ± preset speed", avoiding the resonance coupling of the compressor and the fan. At the same time, by greatly increasing the fan speed, it helps to quickly restore the cooling efficiency and make up for the lack of cooling during the low speed operation of the fan.

[0015] In some embodiments, the load of the refrigerator in the second operating mode is higher than the load of the refrigerator in the first operating mode.

[0016] In some embodiments, the preset rotation speed is 3 Hz.

[0017] In some embodiments, the refrigerator further includes a humidifying fan, and the controller is further configured to control the humidifying fan to operate when the damper is in a closed state and the refrigerating chamber needs to be humidified.

[0018] The above technical solution has the following advantages or beneficial effects: by running the humidification fan when the damper is closed, noise fluctuations caused by frequent opening of the damper or other factors can be avoided, making the noise more uniform and less likely to cause annoyance to the user.

[0019] In some embodiments, the controller is further configured to: in response to a shutdown instruction, identify the state of the damper, and control the humidification fan to turn off when the damper is in an open state.

[0020] The above technical solution has the following advantages or beneficial effects: when the damper is in the open state, by first performing the damper closing operation and then allowing the humidification fan to run, noise fluctuations caused by frequent opening of the damper or other factors can be avoided, making the noise more uniform and less likely to cause annoyance to the user.

[0021] In some embodiments, the controller is further configured to, after the temperature of the refrigerating chamber drops to a preset refrigerating temperature and the damper is closed, when the temperature of the freezer chamber is higher than the preset freezing and refrigeration temperature, control the refrigeration system to refrigerate the freezer chamber in response to a refrigeration request from the freezer chamber to cool the freezer chamber until the temperature of the freezer chamber reaches the preset freezing and refrigeration temperature.

[0022] The above technical solution has the following advantages or beneficial effects: after the temperature of the refrigerator compartment drops to the preset refrigeration temperature, the temperature of the freezer compartment is only adjusted to the preset freezing and refrigeration temperature, rather than excessively cooling to a lower temperature level, thereby achieving more efficient energy consumption management.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a block diagram of a refrigerator according to an embodiment of the present invention; Figure 2 is a side view of a refrigerator according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a damper according to an embodiment of the present invention; Figure 4 is a schematic diagram of a damper noise curve according to an embodiment of the present invention; Figure 5 is a schematic diagram of a refrigeration system according to an embodiment of the present invention; Figure 6 is a block diagram of a controller according to one embodiment of the present invention; Figure 7 is a flow chart of a method for controlling a refrigerator air door switch state according to an embodiment of the present invention; Figure 8 is a flow chart of controlling the speed of the compressor in a first operation mode of a refrigerator according to an embodiment of the present invention; Fig. 9is a flow chart of controlling the operating speed of a fan in a refrigerator in a second operating mode according to an embodiment of the present invention; Fig.10 is a flow chart of a method for controlling a humidifying fan according to an embodiment of the present invention.

[0025] Reference numerals: Refrigerator 100; Box 1; refrigeration system 2; controller 3; damper 4; temperature sensor 5; humidifying fan 6; Refrigerating chamber 11; freezing chamber 12; compressor 21; condenser 22; evaporator 23; fan 24; processor 31; memory 32; housing 41; movable part 42; driving part 43. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0027] Reference below Figure 1-Figure 6 A refrigerator according to an embodiment of the present invention is described.

[0028] Figure 1 is a block diagram of a refrigerator according to an embodiment of the present invention.

[0029] like Figure 1 As shown, the refrigerator 100 includes a cabinet 1 .

[0030] In some embodiments, the box 1 is the external structure of the refrigerator 100, providing physical protection for the internal space of the refrigerator 100, that is, it can protect the internal refrigeration components and food from the external environment, such as dust, moisture, collision, etc. Through the thermal insulation material, the box 1 can effectively isolate the temperature difference between the inside of the refrigerator 100 and the outside, reduce refrigeration loss, and ensure the refrigeration and freezing effect in the refrigerator 100. In addition, the box 1 provides structural support for various components of the refrigerator 100 (such as the compressor 21, the evaporator 23, the fan 24, etc.), so that the entire refrigerator 100 can operate stably.

[0031] In some embodiments, Figure 2As shown, the box body 1 defines a refrigerating chamber 11 and a freezing chamber 12, and the refrigerating chamber 11 and the freezing chamber 12 can meet the user's storage needs for different foods. Among them, the refrigerating chamber 11 is an independent space inside the refrigerator 100, which is suitable for storing vegetables, fruits, beverages, dairy products and other foods that do not need to be frozen but need to be stored at low temperatures. By keeping the temperature in a low range, the shelf life of the food can be effectively extended. The temperature in the refrigerating chamber 11 can be maintained between 2°C and 8°C, and the specific temperature can be adjusted according to the type of food. The freezing chamber 12 is another independent space inside the refrigerator 100, which is suitable for storing meat, seafood, frozen food, etc. The freezing chamber 12 can quickly freeze food, keep the nutrients of the food from being lost, and can also be used for the production of ice cubes and frozen drinks. The temperature of the freezing chamber 12 can be maintained in the range of -18°C or lower. By maintaining a low temperature environment, food can be frozen to prevent bacterial growth and food deterioration, and the shelf life of food can be extended.

[0032] In some embodiments, a heat exchange channel is provided between the freezing chamber 12 and the refrigerating chamber 11, wherein the heat exchange channel serves as a connecting passage between the freezing chamber 12 and the refrigerating chamber 11, allowing cold air in the freezing chamber 12 to flow to the refrigerating chamber 11 through the heat exchange channel, thereby meeting the refrigeration demand of the refrigerating chamber 11. At the same time, a damper 4 is provided on the heat exchange channel, and the damper 4 is used to control the switch state of the heat exchange channel between the freezing chamber 12 and the refrigerating chamber 11.

[0033] Specifically, Figure 3 As shown, the damper 4 may include but is not limited to: a housing 41, a movable part 42, a driving part 43, etc. Among them, the housing 41 is the main component of the damper 4, and plays the role of supporting and fixing other parts. The movable part 42 can be a rotatable part, which is used to control the opening degree of cold air from the freezing chamber 12 to the refrigerating chamber 11. Its state can be completely closed, partially opened or completely opened, and can be flexibly adjusted according to the instructions of the controller 3. The driving part 43 can be a stepping motor or a servo motor, which is used to accurately control the opening and closing action of the movable part 42.

[0034] In addition, the damper 4 may further include: a heating wire and a sealing member, wherein the heating wire may be composed of a silicone insulation layer, a metal resistance wire and a plastic core, and is used to heat and melt frost that may be formed at the air outlet, thereby ensuring the normal operation of the damper 4. The sealing member may be located between the movable member 42 and the housing 41, and is used to effectively block the air flow between the freezing chamber 12 and the refrigerating chamber 11 when the damper 4 is closed, prevent cold air leakage, and improve the refrigeration efficiency of the refrigerating chamber 11 and the freezing chamber 12. The sealing member may be made of a flexible rubber material to achieve a better sealing effect.

[0035] In some embodiments, the damper 4 is mainly used to adjust the air flow between the refrigerator compartment 11 and the freezer compartment 12. By controlling the damper 4 to open, the temperature of the refrigerator compartment 11 can be lowered to ensure that the food is kept within a suitable temperature range. This helps to improve the energy efficiency of the refrigerator 100 and the preservation effect of food. Figure 4 As shown in the black box in the figure, when the damper 4 is opened, the air flow may cause increased wind noise due to the narrow heat exchange channel between the freezing chamber 12 and the refrigerating chamber 11. When the damper 4 is frequently opened and closed, the noise fluctuation generated by the refrigerator 100 will be more obvious. In addition, the movable part 42 of the damper 4 may generate mechanical noise when it contacts the housing 41 each time it is opened and closed, thereby making the noise of the whole machine louder and affecting the user's experience.

[0036] like Figure 1 As shown, the refrigerator 100 further includes a refrigeration system 2 .

[0037] In some embodiments, the refrigeration system 2 is the core functional module of the refrigerator 100. Its function is to transfer the heat inside the refrigerator 100 to the outside through the circulation of the refrigerant, thereby refrigerating the freezer chamber 12 and ensuring that the frozen food can be stored for a long time.

[0038] Figure 5 is a schematic diagram of a refrigeration system according to an embodiment of the present invention. Figure 5 As shown, the refrigeration system 2 may include but is not limited to: a compressor 21, a condenser 22, an evaporator 23, a fan 24, etc. The controller 3 may be connected to the temperature sensor 5 and the refrigeration system 2, and according to the temperature of the freezing chamber 12 detected in real time by the temperature sensor 5, the refrigeration system 2 may be controlled to perform a refrigeration operation on the freezing chamber 12, so that the temperature of the freezing chamber 12 can meet the requirements of food storage.

[0039] In some embodiments, the compressor 21 is one of the core components of the refrigeration system 2, which is responsible for compressing the low-pressure, low-temperature refrigerant into a high-pressure, high-temperature gas to provide power for the refrigeration cycle. The compressor 21 can be a piston compressor, a scroll compressor, a centrifugal compressor, or a screw compressor. The specific type of the compressor 21 can be selected according to the specific requirements and application scenarios of the refrigerator 100, and is not specifically limited here.

[0040] In some embodiments, the condenser 22 may be a heat exchange device in the refrigeration system 2, and its main function is to cool the high-temperature and high-pressure gas discharged from the compressor 21 and condense it into liquid, thereby releasing heat. The condenser 22 may be a fin condenser, a plate condenser, or a shell and tube condenser of different types. The specific type of the condenser 22 may be selected according to the specific requirements and application scenarios of the refrigerator 100, and is not specifically limited here.

[0041] In some embodiments, the main function of the evaporator 23 is to transfer cold to the inside of the freezing chamber 12. Evaporation absorbs heat in the freezing chamber 12, ensuring that the temperature drops to -18°C or lower, ensuring that the food is quickly frozen, thereby preventing the food from spoiling, and being suitable for long-term storage of food. The design of the evaporator 23 can adopt a coil evaporator 23. The arrangement and surface area of ​​the evaporator 23 can be different according to the design requirements of the freezing chamber 12. For the freezing chamber 12 that requires a rapid freezing function, the surface area and refrigerant flow rate of the evaporator 23 can be larger to ensure rapid refrigeration.

[0042] In some embodiments, the main function of the fan 24 is to promote the flow of cold air inside the refrigerator 100, ensuring that the cold air is evenly distributed to every corner of the refrigerating chamber 11 and the freezing chamber 12, thereby improving the refrigeration efficiency. In the condenser 22, the fan 24 helps to improve the heat exchange efficiency. It discharges the hot air around the condenser 22, so that the condenser 22 can cool the refrigerant more effectively and convert it into a liquid state. In addition, the fan 24 can also help prevent the accumulation of frost to a certain extent, and reduce the accumulation of moisture by enhancing air flow, thereby slowing down the frosting phenomenon inside the refrigerator 100.

[0043] like Figure 1 As shown, the refrigerator 100 also includes a controller 3 .

[0044] In some embodiments, the controller 3 is the core control unit of the refrigerator 100 , and the controller 3 is connected to the damper 4 , and is used to control the switch state of the heat exchange channel between the freezing chamber 12 and the refrigerating chamber 11 .

[0045] In some embodiments, the controller 3 is configured to: when the temperature of the freezing chamber 12 is lower than the preset freezing and refrigeration temperature, in response to the refrigeration request of the refrigerating chamber 11, control the damper 4 to open. When the opening time of the damper 4 reaches a first preset time, the temperature of the refrigerating chamber 11 does not reach the preset refrigeration temperature, and the temperature of the freezing chamber 12 rises to the preset freezing and refrigeration temperature, control the damper 4 to close, and control the refrigeration system 2 to refrigerate the freezing chamber 12. When the temperature of the freezing chamber 12 drops to the preset heat exchange refrigeration temperature, control the damper 4 to open, until the temperature of the refrigerating chamber 11 drops to the preset refrigeration temperature, control the damper 4 to close, wherein the preset heat exchange refrigeration temperature is lower than the preset freezing and refrigeration temperature.

[0046] The preset freezing and refrigeration temperature may refer to the minimum required temperature for the freezer 12 to maintain normal storage of items, that is, when the temperature is greater than or equal to the preset freezing and refrigeration temperature, the freezer 12 needs to perform a refrigeration operation to ensure that the freezer 12 is kept in a suitable low temperature environment. The preset freezing and refrigeration temperature may be set according to factors such as item storage requirements, the performance of the refrigerator 100, the ambient temperature, and user preferences, and is not specifically limited here. For example, the preset freezing and refrigeration temperature may be set between -18°C and -25°C.

[0047] In some embodiments, the first preset time length may refer to the time interval for the freezer compartment 12 to deliver cold air to the refrigerator compartment 11 after the damper 4 is opened, so as to avoid the abnormal increase in the temperature of the freezer compartment 12 due to the damper 4 being opened for a long time. The time interval determines whether the refrigerator compartment 11 can obtain enough cold air to reduce the temperature within a limited time. The first preset time length may be set according to factors such as the heat exchange rate, the refrigeration demand of the refrigerator compartment, and the operating frequency of the compressor 21, and is not specifically limited here.

[0048] In some embodiments, the preset heat exchange refrigeration temperature may refer to a lower temperature that the freezer compartment 12 needs to reach before the damper 4 is opened again. The purpose of the preset heat exchange refrigeration temperature being lower than the preset freezing refrigeration temperature is to ensure that the temperature of the freezer compartment 12 is low enough so that the freezer compartment 12 can provide a greater amount of cold air when providing cold air to the refrigerating compartment 11, thereby achieving a one-time reduction in the temperature of the refrigerating compartment 11 to the preset refrigerating temperature, while avoiding the rapid increase in the temperature of the freezer compartment 12 to the preset freezing refrigeration temperature due to the opening of the damper 4. By reducing the temperature of the refrigerating compartment 11 to the preset refrigerating temperature at one time, the number of times the damper 4 is opened can be reduced while ensuring the refrigeration of the refrigerating compartment 11 and the freezer compartment 12, thereby effectively reducing the noise problem caused by the frequent opening of the damper 4 and improving the user experience.

[0049] In some embodiments, the preset heat exchange refrigeration temperature can be set according to factors such as the refrigeration demand of the refrigerating chamber 11, the heat exchange efficiency, the preset freezing and refrigeration temperature, and the refrigeration capacity of the freezing chamber 12, and is not specifically limited here. For example, the preset heat exchange refrigeration temperature can be set to -25°C to -30°C.

[0050] In some embodiments, Figure 6As shown, the controller 3 may include a processor 31 and a memory 32. The processor 31 may be a central processing unit 31 (CPU), a microcontroller unit 3 (MCU), a digital signal processor 31 (DSP), a graphics processing unit (GPU), a field programmable gate array (FPGA) or an application-specific integrated circuit (ASIC), etc., for completing temperature detection, damper 4 control and execution of the refrigeration system 2.

[0051] In some embodiments, the memory 32 may be a random access memory (RAM), a read-only memory (ROM), a flash memory (Flash), or a non-volatile memory 32 (NVRAM) for storing control logic programs, preset temperature thresholds, and historical operating data.

[0052] According to the refrigerator 100 of the embodiment of the present invention, based on the setting that the preset heat exchange refrigeration temperature is lower than the preset freezing and refrigeration temperature, when the temperature of the freezer chamber 12 is lower than the preset freezing and refrigeration temperature, the refrigerator 100 responds to the refrigeration request of the refrigerator chamber 11 and controls the damper 4 to open; when the opening time of the damper 4 reaches the first preset time and the temperature of the refrigerator chamber 11 does not reach the preset refrigeration temperature and the temperature of the freezer chamber 12 rises to the preset freezing and refrigeration temperature, the damper 4 is controlled to close, and the refrigeration system 2 is started to cool the freezer chamber 12 at the same time; after the temperature of the freezer chamber 12 drops below the preset heat exchange refrigeration temperature, this means that the temperature of the freezer chamber 12 is low enough; at this time, by controlling the damper 4 to open, the temperature of the refrigerator chamber 11 can be reduced to the preset refrigeration temperature at one time, and then the damper 4 is closed; this control method can greatly reduce the frequency of opening and closing of the damper 4, and effectively reduce the noise problem caused by the frequent opening of the damper 4. At the same time, reducing the frequent opening and closing of the damper 4 can make the cold air delivery to the refrigerator compartment 11 more efficient, thereby effectively shortening the cooling time of the refrigerator compartment 11 and reducing the total opening time of the damper 4, thereby not only reducing noise, but also reducing energy consumption and improving the user experience.

[0053] In some embodiments, the refrigeration system 2 includes a compressor 21, and the refrigerator 100 also includes a fan 24. The controller 3 is configured to: in a first operating mode, when there is a variable frequency speed of the compressor 21 within the speed range of (current operating speed of the fan 24 ± preset speed), control the speed of the compressor 21 to reduce a first amplitude, and the first amplitude is greater than or equal to the preset speed.

[0054] Among them, the first operating mode can be a low-load operating mode of the refrigerator 100, for example, the "energy-saving mode" selected by the user. In this mode, the compartments of the refrigerator 100 have relatively low demand for refrigeration. Since there may be resonance when the fan 24 and the compressor 21 are running, especially when the rotation speeds of the two are close or overlapped, the refrigerator 100 will generate a large noise peak. Therefore, in the first operating mode, the controller 3 can adjust the rotation speed of the compressor 21 to avoid the resonance range of the current operating speed of the fan 24 (that is, "the current operating speed of the fan 24 ± the preset speed"), thereby avoiding the resonant coupling between the fan 24 and the compressor 21, reducing noise and improving user experience.

[0055] In some embodiments, the preset speed can be set according to the operating characteristics of the fan 24, and the first amplitude is the adjustment amount for reducing the speed of the compressor 21, and its setting needs to be greater than or equal to the preset speed. The purpose of this setting is to ensure that the speed of the compressor 21 can completely avoid the resonance range, thereby reducing the possibility of interference or resonance.

[0056] In some embodiments, the controller 3 is further configured to: record the duration of the operation of the compressor 21 at a speed reduced by a first amplitude, and when the duration of the operation of the compressor 21 at a speed reduced by the first amplitude reaches a second preset duration and the refrigerator 100 is not shut down, control the speed of the compressor 21 to increase by a second amplitude, and control the compressor 21 to operate at the speed increased by the second amplitude until the refrigerator 100 shuts down, and the second amplitude is greater than or equal to twice the preset speed.

[0057] In some embodiments, the controller 3 can use a built-in timer module or software timing function to record in real time the duration of the compressor 21 running at a speed reduced to a first amplitude. By real-time monitoring of the running time, the controller 3 can determine whether the compressor 21 has met the set time condition (i.e., reached the second preset time) in the adjusted low speed range.

[0058] In some embodiments, the compressor 21 operates at a speed reduced by the first amplitude to effectively avoid the resonance problem between the fan 24 and the compressor 21. However, long-term operation at a lower speed may cause the refrigeration efficiency to decrease, and the temperature of the freezer 12 to rise, thereby failing to meet the refrigeration demand. At the same time, the setting of the second preset time length can ensure that the speed adjustment of the compressor 21 has a sufficient time period to avoid unstable control due to frequent adjustments. The specific setting of the second preset time length can be flexibly adjusted according to factors such as refrigeration demand, ambient temperature, refrigerator 100 operation mode, user habits, etc., and is not specifically limited here.

[0059] In some embodiments, the fact that the refrigerator 100 is not shut down is also an important basis for determining whether the speed of the compressor 21 needs to be increased. If the refrigerator 100 enters the shutdown state, the compressor 21 stops working, and the fan 24 keeps running for a certain period of time to maintain the fluidity and temperature uniformity of the air inside the refrigerator 100. If the refrigerator 100 is not shut down and continues to run, it may mean that the refrigeration demand is high, and at this time, it is necessary to speed up the refrigeration by increasing the speed of the compressor 21.

[0060] In some embodiments, the second amplitude is set to be greater than or equal to twice the preset speed, which can ensure that the adjusted operating speed of the compressor 21 does not fall into the resonance interval of "the current speed of the fan 24 ± the preset speed", thereby avoiding the resonance coupling between the compressor 21 and the fan 24. At the same time, by greatly increasing the speed of the compressor 21, it is helpful to quickly restore the refrigeration efficiency and make up for the insufficient refrigeration during the low-speed operation of the compressor 21.

[0061] In some embodiments, the refrigeration system 2 includes a compressor 21, the refrigerator 100 also includes a fan 24, and the controller 3 is further configured to: in the second operating mode, when the current operating speed of the fan 24 exists within the speed range of (the speed of the compressor 21 ± the preset speed), the current operating speed of the fan 24 is controlled to be adjusted to the first speed of the fan 24, and the first speed of the fan 24 is the difference between the speed of the compressor 21 and the first amplitude, and the first amplitude is greater than or equal to the preset speed.

[0062] In some embodiments, the second operation mode may be a high-load operation mode of the refrigerator 100, such as a "fast cooling mode". That is, the load of the refrigerator 100 in the second operation mode is higher than the load of the refrigerator 100 in the first operation mode. At this time, due to the large refrigeration demand of the refrigerator 100, the compressor 21 of the refrigerator 100 needs to operate at a higher speed to provide sufficient refrigeration capacity. Therefore, in this case, the controller 3 cannot avoid resonance of the speed of the fan 24 by adjusting the speed of the compressor 21.

[0063] Specifically, in the refrigeration system 2, the compressor 21 and the fan 24 each have their own speed range. If the speeds of the two are close to or overlap, resonance may occur. Resonance may cause increased noise and affect the working stability of the refrigerator 100. Therefore, in the second operating mode, the controller 3 can adjust the operating speed of the fan 24 to avoid the resonance range of the speed of the compressor 21 (i.e., "the speed of the compressor 21 ± the preset speed"), thereby effectively avoiding the resonant coupling between the fan 24 and the compressor 21, which can not only reduce the noise of the refrigerator 100, but also improve the stability and comfort of the operation of the refrigerator 100.

[0064] In some embodiments, the purpose of setting the first amplitude to be greater than or equal to the preset speed is to ensure that there is always a sufficient gap between the speed of the compressor 21 and the speed of the fan 24 to avoid direct interference or resonance between the two. By setting the first amplitude, the controller 3 can dynamically adjust the speed of the fan 24 so that the fan 24 and the compressor 21 can achieve efficient coordinated operation in the second operating mode.

[0065] In some embodiments, the controller 3 is also configured to: record the length of time that the fan 24 runs at the first fan 24 speed, and when the length of time that the fan 24 runs at the first fan 24 speed reaches a third preset length of time and the refrigerator 100 is not shut down, control the fan 24 to adjust to the second fan 24 speed, and the second fan 24 speed is the sum of the speed of the compressor 21 and the first amplitude.

[0066] In some embodiments, the controller 3 can record in real time the duration that the fan 24 runs at the first fan 24 speed through a built-in timer module or software timing function. By real-time monitoring of the running time, the controller 3 can determine whether the fan 24 has met the set time condition (i.e., reached the third preset time) when running in the adjusted low speed range.

[0067] In some embodiments, by controlling the current operating speed of the fan 24 to be adjusted to the difference between the speed of the compressor 21 and the first amplitude, the resonance problem between the fan 24 and the compressor 21 can be effectively avoided. However, long-term operation at a lower speed may cause the refrigeration efficiency to decrease, the temperature of the freezer 12 to rise, and thus fail to meet the refrigeration demand. Therefore, the third preset duration is the time threshold for controlling the fan 24 to operate at the first fan 24 speed. Its function is to ensure that the necessary speed adjustment is made after the fan 24 runs at the first fan 24 speed for a reasonable period of time. At the same time, the setting of the third preset duration can ensure that the speed adjustment of the fan 24 has a sufficient time period to avoid unstable control due to frequent adjustments. The specific setting of the third preset duration can be flexibly adjusted according to factors such as refrigeration demand, ambient temperature, refrigerator 100 operation mode, user habits, etc., and is not specifically limited here.

[0068] In some embodiments, the fact that the refrigerator 100 is not shut down is also an important basis for determining whether the compressor 21 needs to increase its speed. If the refrigerator 100 enters the shutdown state, the compressor 21 stops working, and the fan 24 keeps running for a certain period of time to maintain the fluidity and temperature uniformity of the air inside the refrigerator 100. If the refrigerator 100 is not shut down and continues to run, it may mean that the refrigeration demand is high. At this time, it is necessary to increase the speed of the fan 24 (i.e., the speed of the second fan 24) to improve the cold air delivery capacity.

[0069] In some embodiments, the speed of the second fan 24 is set to the sum of the speed of the compressor 21 and the first amplitude, which can ensure that the adjusted operating speed of the fan 24 does not fall into the resonance interval of "the speed of the compressor 21±the preset speed", thereby avoiding the resonance coupling between the compressor 21 and the fan 24. At the same time, by greatly increasing the speed of the fan 24, it is helpful to quickly restore the refrigeration efficiency and make up for the insufficient refrigeration during the low speed operation of the fan 24.

[0070] In some embodiments, the preset speed may be 3 Hz, which is a general value selected after experimental verification for adjusting the speed of the compressor 21 and the fan 24, and has both stability and applicability, and can effectively meet the resonance avoidance and performance requirements of the refrigerator 100 under most working conditions.

[0071] In some embodiments, Figure 5 As shown, the refrigerator 100 further includes a humidifying fan 6. The function of the humidifying fan 6 of the refrigerator 100 is to help maintain the freshness of food by increasing the humidity in the refrigerating chamber 11. It can prevent the moisture on the surface of the food from evaporating too quickly, thereby extending the preservation time of the food. In addition, the humidifying fan 6 can also improve the circulation of cold air, make the temperature more evenly distributed, and improve the overall preservation effect of the refrigerator 100.

[0072] In some embodiments, when the damper 4 is in a closed state and the refrigerator compartment 11 needs to be humidified, the humidification fan 6 is controlled to run. The purpose of this design is that the noise when the damper 4 is closed is relatively stable, and the closing of the damper 4 reduces the overall noise of the refrigerator 100 (there is a difference of 1-2dB). In this case, when the humidification fan 6 is running, although the operation of the humidification fan 6 will generate a certain amount of noise, since the damper 4 is in a closed state, the humidification fan 6 will not overlap with the damper 4, and the noise fluctuations generated by the humidification fan 6 will have relatively little interference to the user, which helps to maintain the stability of the noise of the refrigerator 100. This control strategy can avoid noise fluctuations caused by frequent opening of the damper 4 or other factors by running the humidification fan 6 when the damper 4 is closed, making the noise more uniform and less likely to cause annoyance to the user.

[0073] In addition, when the damper 4 is in a closed state, the air flow inside the refrigerator 100 is restricted. At this time, the humidifying fan 6 is started to maintain air flow and help evenly distribute moisture. The humidifying fan 6 can evenly distribute moisture in the refrigerating chamber 11 through a certain air circulation to avoid uneven humidity. By reasonably adjusting the operation of the humidifying fan 6, it can help maintain a suitable humidity in the refrigerating chamber 11, further improving the preservation effect of food.

[0074] In some embodiments, the controller 3 is further configured to: in response to the shutdown command, identify the state of the damper 4, and control the damper 4 to close when the damper 4 is in the open state. Specifically, when the controller 3 receives the shutdown command, it will first determine the state of the damper 4. If the damper 4 is currently in the open state, the controller 3 will first perform the operation of closing the damper 4 according to the design requirements of the system to allow the humidification fan 6 to run. This is because the frequent opening and closing of the damper 4 will generate additional noise fluctuations. Therefore, by closing the damper 4, it can ensure that the noise generated by the refrigerator 100 is more uniform and reduce the annoyance of the user.

[0075] In some embodiments, the shutdown command may be issued by a user through a control panel, a remote control device, or other intelligent device. When the refrigerator 100 is completed or the user manually triggers the shutdown, the controller 3 receives the shutdown command. The purpose of the shutdown command is to stop the operation of the compressor 21, the fan 24, and other components to save energy and extend the service life of the device.

[0076] In some embodiments, the controller 3 is further configured to, after the temperature of the refrigerating chamber 11 drops to a preset refrigerating temperature and the damper 4 is closed, when the temperature of the freezer chamber 12 is higher than a preset freezing and refrigeration temperature, in response to a refrigeration request for the freezer chamber 12, control the refrigeration system 2 to refrigerate the freezer chamber 12 until the temperature of the freezer chamber 12 reaches the preset freezing and refrigeration temperature.

[0077] Specifically, after the temperature of the refrigerating chamber 11 drops to the preset refrigerating temperature, the temperature of the refrigerating chamber 11 has met the refrigeration demand of the refrigerating chamber 11. At this time, by controlling the damper 4 to be closed, the freezing chamber 12 will not be able to continue to supply cold air to the refrigerating chamber 11 through the heat exchange channel. At this time, if it is detected that the temperature of the freezing chamber 12 is higher than the preset freezing and refrigeration temperature, the controller 3 can refrigerate the freezing chamber 12 through the refrigeration system 2 to reduce its temperature to the preset freezing and refrigeration temperature. In this case, the reason why it is not necessary to reduce the temperature to the preset heat exchange refrigeration temperature is that the temperature of the refrigerating chamber 11 has already dropped to the preset refrigerating temperature. Therefore, in order to save energy and reduce the workload of the compressor 21, it is only necessary to adjust the temperature of the freezing chamber 12 to the preset freezing and refrigeration temperature, rather than excessively cooling it to a lower temperature level, thereby achieving more efficient energy consumption management.

[0078] Based on the detailed description of the refrigerator in the above embodiment, Figure 7-Figure 10 The control of the damper switch state, the speed adjustment of the compressor and the fan, and the control of the humidifying fan according to an embodiment of the present invention are described.

[0079] Figure 7 FIG. 1 is a flow chart of a method for controlling a refrigerator air door switch state according to an embodiment of the present invention. Figure 7As shown, the process of the method for controlling the switch state of the refrigerator air door at least includes steps S1-S10.

[0080] S1, refrigerator starts.

[0081] S2, the refrigeration system refrigerates the freezer compartment.

[0082] S3, the cold room requests cooling.

[0083] S4, when the temperature of the freezing chamber is lower than the preset freezing and refrigeration temperature, in response to a refrigeration request of the refrigerating chamber, the damper is controlled to open.

[0084] S5, when the air door opening time reaches a first preset time and the temperature of the refrigerating chamber does not reach the preset refrigerating temperature and the temperature of the freezing chamber rises to the preset freezing and refrigeration temperature, control the air door to close.

[0085] S6, the refrigeration system refrigerates the freezer compartment.

[0086] S7, when the temperature of the freezing chamber drops to the preset heat exchange refrigeration temperature, the refrigerating chamber requests refrigeration.

[0087] S8, controlling the air door to open until the temperature of the refrigerating chamber drops to a preset refrigerating temperature.

[0088] S9, controlling the damper to close, when the temperature of the freezer compartment is higher than the preset freezing and refrigeration temperature, in response to a refrigeration request of the freezer compartment, controlling the refrigeration system to refrigerate the freezer compartment until the temperature of the freezer compartment reaches the preset freezing and refrigeration temperature.

[0089] S10, the refrigerator stops.

[0090] To summarize, by lowering the refrigeration temperature requirement of the freezer, that is, the freezer temperature drops below the preset heat exchange refrigeration temperature, by controlling the opening of the damper, the temperature of the refrigerator can be reduced to the preset refrigeration temperature at one time, and then the damper is closed. This control method can greatly reduce the frequency of damper switching, and effectively reduce the noise problem caused by frequent opening of the damper.

[0091] Figure 8 FIG. 1 is a flow chart of controlling the speed of the compressor in the first operation mode of a refrigerator according to an embodiment of the present invention. Figure 8 As shown, the process of controlling the compressor speed of the refrigerator in the first operation mode includes at least steps S20-S28.

[0092] S20, the refrigerator enters the first operating mode.

[0093] S21, identifying the current operating speed of the fan.

[0094] S22, determine whether there is a compressor variable frequency speed within the speed range of (current operating speed of the fan ± preset speed), if yes, proceed to step S23, if not, proceed to step S24.

[0095] S23, controlling the speed of the compressor to decrease by a first amplitude, where the first amplitude is greater than or equal to a preset speed.

[0096] S24, there is no need to adjust the compressor speed, the compressor maintains normal operation.

[0097] S25, recording the duration of the compressor running at the rotation speed reduced by the first amplitude.

[0098] S26, determining whether the duration for which the compressor runs at a speed reduced by the first amplitude reaches a second preset duration and the refrigerator is shut down, if so, proceeding to step S27, if not, proceeding to step S28.

[0099] S27, the compressor stops working and the fan keeps running for a certain period of time to maintain the fluidity and temperature uniformity of the air inside the refrigerator.

[0100] S28, controlling the speed of the compressor to increase by a second amplitude, and controlling the compressor to operate at the speed increased by the second amplitude until the refrigerator stops, and the second amplitude is greater than or equal to twice the preset speed.

[0101] To summarize, by adjusting the compressor to operate at a speed reduced by the first amplitude, and adjusting the compressor to operate at a speed increased by the second amplitude, it can ensure that the adjusted operating speed of the compressor does not fall into the resonance range of "current fan speed ± preset speed", thereby avoiding resonant coupling between the compressor and the fan, reducing noise and improving user experience.

[0102] Fig. 9 FIG. 1 is a flow chart of controlling the fan speed of a refrigerator in the second operation mode according to an embodiment of the present invention. Fig. 9 As shown, the process of controlling the fan operating speed of the refrigerator in the second operating mode at least includes steps S100-S107.

[0103] S100, the refrigerator enters the second operation mode.

[0104] S101, identifying the current operating speed of the compressor.

[0105] S102, determine whether the current operating speed of the fan exists within the speed range of (compressor speed ± preset speed), if yes, proceed to step S103, if not, proceed to step S104.

[0106] S103, controlling the current operating speed of the fan to be adjusted to a first fan speed, where the first fan speed is a difference between the speed of the compressor and a first amplitude, and the first amplitude is greater than or equal to a preset speed.

[0107] S104: There is no need to adjust the fan speed, and the fan maintains normal operation.

[0108] S105, recording the time duration during which the fan runs at the first fan speed.

[0109] S106, when the duration of the fan running at the first fan speed reaches a third preset duration and the refrigerator is not shut down, controlling the fan to adjust to a second fan speed, where the second fan speed is the sum of the compressor speed and the first amplitude.

[0110] S107, controlling the fan to run at a second fan speed until the refrigerator stops.

[0111] To summarize, by adjusting the fan to run at the first fan speed and adjusting the fan to run at the second fan speed, it can ensure that the adjusted operating speed of the fan does not fall into the resonance range of "compressor speed ± preset speed", thereby avoiding resonant coupling between the compressor and the fan, reducing noise and improving user experience.

[0112] Fig.10 FIG. 1 is a flow chart of a method for controlling a humidifying fan according to an embodiment of the present invention. Fig.10 As shown, the process of the control method of the humidifying fan at least includes steps S200-S202.

[0113] S200, in response to a shutdown command, identifying a state of the damper.

[0114] S201, when the damper is in the open state, first control the damper to close.

[0115] S202, when the damper is in a closed state and there is a need for humidification in the refrigerating chamber, control the humidification fan to run.

[0116] To sum up, if the damper is currently in the open state, by first closing the damper and then controlling the humidification fan to run, additional noise fluctuations caused by frequent switching of the damper can be avoided, as well as the superposition of noise from the humidification fan and the damper. This helps to maintain the noise stability during refrigerator operation, making the noise more uniform, thereby reducing the user's discomfort caused by noise fluctuations.

[0117] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0118] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A refrigerator, comprising: A box body, wherein the box body defines a refrigerating chamber and a freezing chamber, a heat exchange channel is provided between the freezing chamber and the refrigerating chamber, and a damper is provided on the heat exchange channel, and the damper is used to control the opening and closing of the heat exchange channel between the freezing chamber and the refrigerating chamber; A refrigeration system, the refrigeration system is used to refrigerate the freezing chamber; A controller connected to the damper, wherein the controller is configured to: When the temperature of the freezing chamber is lower than a preset freezing and refrigeration temperature, in response to a refrigeration request of the refrigerating chamber, controlling the damper to open; When the air door is opened for a first preset time and the temperature of the refrigerating chamber does not reach the preset refrigerating temperature and the temperature of the freezing chamber rises to the preset freezing and refrigeration temperature, the air door is controlled to be closed, and the refrigeration system is controlled to refrigerate the freezing chamber; When the temperature of the freezer compartment drops to a preset heat exchange refrigeration temperature, the damper is controlled to open, until the temperature of the refrigerator compartment drops to a preset refrigeration temperature, the damper is controlled to close, wherein the preset heat exchange refrigeration temperature is lower than the preset freezing refrigeration temperature.

2. The refrigerator according to claim 1, characterized in that: The refrigeration system includes a compressor, and the refrigerator also includes a fan; The controller is also configured to: in the first operating mode, when there is a compressor variable frequency speed within the speed range of (the current operating speed of the fan ± the preset speed), control the speed of the compressor to reduce a first amplitude, and the first amplitude is greater than or equal to the preset speed.

3. The refrigerator according to claim 2, characterized in that: The controller is also configured to: record the duration of the operation of the compressor at the speed reduced by the first amplitude, and when the duration of the operation of the compressor at the speed reduced by the first amplitude reaches a second preset duration and the refrigerator is not shut down, control the speed of the compressor to increase by a second amplitude, and control the compressor to operate at the speed increased by the second amplitude until the refrigerator shuts down, and the second amplitude is greater than or equal to twice the preset speed.

4. The refrigerator according to claim 2, characterized in that: The refrigeration system includes a compressor, the refrigerator also includes a fan, and the controller is further configured to: in a second operating mode, when the current operating speed of the fan exists within the speed range of (the speed of the compressor ± the preset speed), control the current operating speed of the fan to be adjusted to a first fan speed, wherein the first fan speed is the difference between the speed of the compressor and the first amplitude, and the first amplitude is greater than or equal to the preset speed.

5. The refrigerator according to claim 4, characterized in that: The controller is also configured to: record the duration of the fan running at the first fan speed, and when the duration of the fan running at the first fan speed reaches a third preset duration and the refrigerator is not shut down, control the fan to adjust to a second fan speed, wherein the second fan speed is the sum of the compressor speed and the first amplitude.

6. The refrigerator according to claim 4, characterized in that: The load of the refrigerator in the second operation mode is higher than the load of the refrigerator in the first operation mode.

7. The refrigerator according to any one of claims 2 to 6, characterized in that: The preset rotation speed is set to 3 Hz.

8. The refrigerator according to claim 1, further comprising a humidifying fan, and the controller is further configured to control the humidifying fan to operate when the damper is in a closed state and the refrigerating chamber has a humidification requirement.

9. The refrigerator according to claim 8, characterized in that: The controller is further configured to: in response to a shutdown instruction, identify a state of the damper, and control the damper to close when the damper is in an open state.

10. The refrigerator according to claim 1, characterized in that: The controller is also configured to, after the temperature of the refrigerating chamber drops to a preset refrigerating temperature and the damper is closed, when the temperature of the freezer chamber is higher than the preset freezing and refrigeration temperature, control the refrigeration system to refrigerate the freezer chamber in response to a refrigeration request of the freezer chamber to cool the freezer chamber until the temperature of the freezer chamber reaches the preset freezing and refrigeration temperature.

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