Refrigerator and control method therefor

Abstract

Provided are a refrigerator and a control method therefor. The refrigerator comprises a refrigerator body, a door body, a refrigeration system, a compressor, a first condenser, a throttling apparatus, a second condenser, an evaporator, a condensation fan, a first temperature sensor and a controller, wherein the condensation fan can blow air to the first condenser; the first temperature sensor is arranged at an inlet of the evaporator, and the first temperature sensor can measure an inlet temperature of the evaporator; and the controller is configured to acquire, when the refrigeration system operates, an inlet temperature measured by the first temperature sensor and calculate a change rate of the inlet temperature, and to adjust at least one of the rotation speed of the condensation fan and the rotation speed of the compressor on the basis of the change rate, the change rate being positively correlated with at least one of the rotation speed of the condensation fan and the rotation speed of the compressor.

Description

Refrigerator and control method thereof

[0001] This application claims priority to Chinese patent application No. 202311370778.7, filed on October 20, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the technical field of household appliances, and in particular to a refrigerator and a control method thereof. Background Art

[0003] Refrigerators include single-system refrigerators, which have a single refrigeration system that cools both the freezer and refrigerator compartments. New European standards have set stricter requirements for refrigerator energy efficiency and noise levels. With rising energy prices in Europe, consumers are also paying more attention to the energy consumption of home appliances.

[0004] Summary of the Invention

[0005] Since the air temperature requirements in the freezer and refrigerator are inconsistent, and the air temperature requirement in the refrigerator is greater than that in the freezer, the single-system refrigerator sets an air damper at the inlet of the refrigeration air duct and adjusts the air temperature in the refrigerator and freezer by controlling the opening of the air damper. When the air temperature in the freezer and refrigerator is adjusted, the air in the refrigerator circulates in the refrigeration air duct and the freezing air duct for a long time, which may increase the heat load of the single-system refrigerator and reduce the energy efficiency of the single-system refrigerator.

[0006] To solve this problem, on the one hand, a refrigerator is provided, which includes a cabinet, a door, a refrigeration system, a compressor, a first condenser, a throttling device, a second condenser, an evaporator, a condensing fan, a first temperature sensor and a controller. The door is connected to the cabinet. The condensing fan can blow air to the first condenser. The second condenser is arranged between the first condenser and the throttling device. The first temperature sensor is arranged at the inlet of the evaporator, and the first temperature sensor can detect the inlet temperature of the evaporator. The controller is coupled to the compressor, the first condenser, the throttling device, the evaporator, the condensing fan and the first temperature sensor, and is configured to: when the refrigeration system is running, obtain the inlet temperature detected by the first temperature sensor and calculate the rate of change of the inlet temperature; adjust at least one of the rotation speed of the condensing fan or the rotation speed of the compressor according to the rate of change, and the rate of change is positively correlated with at least one of the rotation speed of the condensing fan or the rotation speed of the compressor.

[0007] In another aspect, a refrigerator control method is provided, wherein the refrigerator comprises: a housing, a door, a gas-liquid separator, and a refrigeration system. A first chamber, a second chamber, a second air duct, and a first air duct are formed within the housing. The return air inlet and the outlet of the second air duct are respectively connected to the second chamber, the air inlet of the first air duct is connected to the air outlet of the second air duct, the air outlet of the first air duct is connected to the first chamber, and the first chamber is connected to the return air inlet of the second air duct. The door is connected to the housing. A refrigeration system is disposed within the housing and comprises: a compressor, a first condenser, a throttling device, an evaporator, a condensing fan, a first temperature sensor, and a damper. The condensing fan is capable of blowing air toward the first condenser. The first temperature sensor is disposed at the inlet of the evaporator and is capable of detecting the inlet temperature of the evaporator. The damper is disposed at the inlet of the first air duct and is capable of opening or closing the inlet of the first air duct. The evaporator is disposed within the second air duct. The control method includes: when the refrigeration system is running, obtaining the inlet temperature detected by the first temperature sensor and calculating the rate of change of the inlet temperature; adjusting at least one of the speed of the condensing fan or the speed of the compressor according to the rate of change; when the damper is open, if it is determined that the inlet temperature rises and the rate of increase of the inlet temperature is greater than the first preset rate, controlling the speed of the compressor to increase by a first preset speed; when the damper is open, if it is determined that the inlet temperature rises and the rate of increase of the inlet temperature is less than or equal to the first preset rate, controlling the speed of the condensing fan to increase by a second preset speed.

[0008] This embodiment adjusts at least one of the speeds of the condensing fan or the compressor by the rate of change of the evaporator's inlet temperature. When the evaporator's inlet temperature increases at a fast rate, at least one of the speeds of the condensing fan or the compressor is increased according to the rate of change of the evaporator's inlet temperature to ensure that the temperatures of the refrigerator and freezer compartments drop to the target temperatures, thereby improving the refrigeration effect of the refrigeration system. When the evaporator's inlet temperature decreases at a fast rate, at least one of the speeds of the condensing fan or the compressor is reduced according to the rate of change of the evaporator's inlet temperature to reduce the refrigeration efficiency of the refrigeration system, thereby reducing the energy consumption of the refrigerator and improving the energy efficiency of the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 is a structural diagram of a refrigerator according to some embodiments;

[0010] FIG2 is a partial structural diagram of a refrigerator according to some embodiments;

[0011] FIG3 is a cross-sectional structural diagram of a refrigerator according to some embodiments;

[0012] FIG4 is an enlarged view of circle A in FIG3 ;

[0013] FIG5 is another structural diagram of a refrigerator according to some embodiments;

[0014] FIG6 is a schematic diagram showing the connection relationship of a refrigeration system according to some embodiments;

[0015] FIG7 is another structural diagram of a refrigerator according to some embodiments;

[0016] FIG8 is a diagram illustrating a coupling relationship between a controller and other components according to some embodiments;

[0017] FIG9 is another diagram illustrating a coupling relationship between a controller and other components according to some embodiments;

[0018] FIG10 is another diagram illustrating a coupling relationship between a controller and other components according to some embodiments;

[0019] FIG11 is a flow chart of a control method according to some embodiments;

[0020] FIG12 is another flow chart of a control method according to some embodiments;

[0021] FIG13 is another flow chart of a control method according to some embodiments;

[0022] FIG14 is another flow chart of a control method according to some embodiments;

[0023] FIG15 is another flow chart of a control method according to some embodiments;

[0024] FIG16 is another flow chart of a control method according to some embodiments;

[0025] FIG17 is another flow chart of a control method according to some embodiments;

[0026] FIG. 18 is another flow chart of a control method according to some embodiments. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0028] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0029] Unless the context requires otherwise, in the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0030] In the following, 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0031] 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.

[0032] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives are used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. For another example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0033] Refrigerators are a common household appliance widely used in daily life. Refrigerators can include single-system refrigerators, for example, which have a single refrigeration system. Refrigerators can also include dual-system refrigerators, for example, which have two refrigeration systems. Single-system refrigerators are more widely used than dual-system refrigerators due to their ease of use and affordability.

[0034] A single-system refrigerator includes a freezer compartment and a refrigerator compartment, and the freezer compartment and the refrigerator compartment are cooled by the same refrigeration system. The refrigerator compartment includes a refrigeration air duct, and the freezer compartment includes a freezing air duct, and the refrigeration air duct and the freezing air duct are connected.

[0035] Because the air temperature requirements for the freezer and refrigerator compartments are inconsistent, and the refrigerator compartment's air temperature requirement is higher than the freezer compartment's, related art single-system refrigerators employ dampers at the inlet of the refrigerator duct to adjust the air temperature in the refrigerator and freezer compartments by controlling the damper's opening, thereby reducing the single-system refrigerator's energy consumption. However, this approach involves the air in the refrigerator compartment circulating in the refrigerator and freezer ducts for extended periods while the air temperatures are being adjusted. This can increase the single-system refrigerator's heat load and reduce its energy efficiency.

[0036] To address the above-mentioned issues, some embodiments of the present disclosure provide a refrigerator 1000 (e.g., a single-system refrigerator). As shown in FIG1 , the refrigerator 1000 includes a housing 1 having a storage compartment 11 with an opening on one side formed therein. The storage compartment 11 includes a first compartment 111 (e.g., a refrigerator compartment) and a second compartment 112 (e.g., a freezer compartment). The first compartment 111 and the second compartment 112 are isolated from each other. The first compartment 111 and the second compartment 112 can store food, and the temperature inside the first compartment 111 is higher than the temperature inside the second compartment 112.

[0037] The refrigerator 1000 further includes a door 2, which is disposed at the opening of the housing 1 and configured to open or close the opening. The housing 1 and the door 2 define a storage chamber 11.

[0038] In some embodiments, as shown in FIG2 , the refrigerator 1000 further includes a refrigeration system 3. The refrigeration system 3 is disposed in the housing 1 and is configured to adjust the temperature in the first chamber 111 and the temperature in the second chamber 112 to improve the storage effect of the second chamber 112 and the first chamber 111 on food.

[0039] In some embodiments, as shown in FIG2 , a mounting cavity 15 is further formed at the lower end of the housing 1 , and the mounting cavity 15 is configured to mount some components of the refrigeration system 3 to reasonably allocate the internal space of the refrigerator 1000 .

[0040] In some embodiments, as shown in FIG3 , a second air duct 12 (eg, a freezing air duct) is further formed in the box body 1 . The second air duct 12 is disposed in the second chamber 112 and has an air inlet and an air outlet.

[0041] A first air duct 13 (eg, a refrigeration air duct) is further formed in the box body 1 . The first air duct 13 is disposed in the first chamber 111 and has an air inlet and an air outlet.

[0042] 5 , the air inlet of the first air duct 13 is connected to the air outlet of the second air duct 12, and the air outlet of the first air duct 13 is connected to the first chamber 111. The air inlet and the air outlet of the second air duct 12 are connected to the second chamber 112 respectively.

[0043] In some embodiments, as shown in FIG6 , the second air duct 12 is connected to the second chamber 112 to form a refrigeration circulation air path (such as the circulation air path M shown in FIG6 ) within the second chamber 112. In this way, the temperature within the second chamber 112 can be adjusted by cooling the air within the refrigeration circulation loop through the refrigeration system 3.

[0044] In some embodiments, as shown in Figure 6, a third air duct 14 (return air duct) is also formed in the box body 1. The third air duct has an air inlet and an air outlet. The air inlet of the third air duct 14 is connected to the first chamber 111, and the air outlet of the third air duct 14 is connected to the air inlet of the second air duct 12, so that the first chamber 111 is connected to the air inlet of the second air duct 12 through the third air duct 14.

[0045] As shown in FIG6 , the second air duct 12, the first air duct 13, the first chamber 111, and the third air duct 14 are sequentially connected to form a refrigeration circulation air path (such as the circulation air path N shown in FIG6 ) for the first chamber 111. In this way, the temperature in the first chamber 111 can be adjusted by cooling the air in the refrigeration circulation air path through the refrigeration system 3.

[0046] 7 , the refrigeration system 3 includes a compressor 31 , which provides power for a refrigeration cycle of the refrigeration system 3 . In some embodiments, the compressor 31 may be disposed in the installation cavity 15 .

[0047] The refrigeration system 3 further includes a first condenser 32 (eg, a bottom condenser), which is configured to condense the refrigerant during the refrigerant cycle. In some embodiments, the first condenser 32 may be disposed within the installation cavity 15 .

[0048] The refrigeration system 3 further includes a throttling device 33, which is configured to throttle and reduce the pressure of the refrigerant in the refrigerant cycle. For example, the throttling device 33 can be a capillary tube, a thermal expansion valve, or an electric expansion valve.

[0049] The refrigeration system 3 further includes an evaporator 34 , which is configured to perform an evaporation process of the refrigerant during a refrigerant cycle.

[0050] The compressor 31 , the first condenser 32 , the throttling device 33 and the evaporator 34 are connected in sequence through pipelines to form a refrigerant circulation loop.

[0051] When the refrigeration system 3 is running, the refrigerant in the refrigeration system 3 is compressed into a high-temperature and high-pressure refrigerant by the compressor 31. The high-temperature and high-pressure refrigerant flows out of the compressor 31 and enters the first condenser 32, and is condensed into a normal-temperature and high-pressure liquid refrigerant through the first condenser 32. The normal-temperature and high-pressure liquid refrigerant enters the throttling device 33, and is throttled and reduced in pressure by the throttling device 33 to be a low-temperature and low-pressure gas-liquid two-phase refrigerant. The low-temperature and low-pressure gas-liquid two-phase refrigerant flows out of the throttling device 33 and enters the evaporator 34, and is evaporated into a low-temperature and low-pressure gaseous refrigerant through the evaporator 34. After the low-temperature and low-pressure gaseous refrigerant flows out of the evaporator 34, it enters the compressor 31 through the return air pipe 35 and is compressed again.

[0052] In some embodiments, as shown in FIG4 , the evaporator 34 is disposed in the second air duct 12 . The refrigerator 1000 further includes a circulation fan 36 , which is also disposed in the second air duct 12 .

[0053] It can be understood that the refrigerant will exchange heat with the air in the second air duct 12 during the evaporation process in the evaporator 34, thereby reducing the air temperature in the second air duct 12. Under the action of the circulating fan 36, the air with reduced temperature can reduce the temperature of the second chamber 112 when it flows through the second chamber 112 through the refrigeration circulation air path, and can reduce the temperature of the first chamber 111 when it flows through the first chamber 111 through the refrigeration circulation air path.

[0054] In some embodiments, as shown in FIG7 , the refrigeration system 3 may further include a second condenser 37 (back condenser). The second condenser 37 is arranged in the interlayer at the back of the box body 1 and is connected in series between the first condenser 32 and the throttling device 33. In this way, after the refrigerant flows through the first condenser 32 and is condensed, it will enter the second condenser 37 and be condensed again in the second condenser 37, thereby improving the condensation effect of the refrigeration system 3 on the refrigerant, reducing the situation where part of the gaseous refrigerant cannot be condensed into liquid refrigerant through the first condenser 32 due to the poor condensation effect of the first condenser 32, and reducing the large proportion of gaseous refrigerant in the refrigerant flowing out of the first condenser 32. The gaseous refrigerant entering the evaporator 34 is large, resulting in insufficient heat exchange of the refrigerant in the evaporator 34 and less heat dissipated by the evaporator 34, which leads to a low air temperature in the return pipe 35 and increased energy consumption.

[0055] When the refrigeration system 3 is running, the refrigerant in the refrigeration system 3 is compressed into a high-temperature and high-pressure refrigerant by the compressor 31. The high-temperature and high-pressure refrigerant flows out of the compressor 31 and enters the first condenser 32, and is condensed into a normal-temperature and high-pressure liquid refrigerant through the first condenser 32. The normal-temperature and high-pressure liquid refrigerant is condensed again through the second condenser 37 and enters the throttling device 33, and is throttled and reduced in pressure to a low-temperature and low-pressure gas-liquid two-phase refrigerant through the throttling device 33. The low-temperature and low-pressure gas-liquid two-phase refrigerant flows out of the throttling device 33 and enters the evaporator 34, and is evaporated into a low-temperature and low-pressure gaseous refrigerant through the evaporator 34. The low-temperature and low-pressure gaseous refrigerant flows out of the evaporator 34 and enters the compressor 31 to be compressed again.

[0056] It should be noted that the operation of the refrigeration system 3 may refer to the operation of the compressor 31, which enables the refrigerant to circulate within the refrigerant circulation circuit. Since the refrigerant releases heat during the condensation process in the first condenser 32, the temperature of the first condenser 32 will increase, thereby affecting the condensation effect of the refrigerant in the first condenser 32 and the temperature of the refrigerant, thereby affecting the cooling effect of the refrigeration system 3.

[0057] As shown in FIG8 , the refrigeration system 3 further includes a condensing fan 37 . The condensing fan 37 is disposed within the mounting cavity 15 and is located on one side of the first condenser 32 . The condensing fan 37 is configured to blow air toward the first condenser 32 to cool and dissipate heat therefrom, thereby improving the condensation efficiency of the refrigerant by the first condenser 32 and thereby enhancing the cooling efficiency of the refrigeration system 3 .

[0058] In some embodiments, as shown in FIG. 8 , the refrigerator 1000 further includes a first temperature sensor 4 , which is disposed at the inlet of the evaporator 34 and configured to detect the inlet temperature of the evaporator 34 .

[0059] The refrigerator 1000 further includes a controller 6 coupled to the condensing fan 37 and the first temperature sensor 4 . Thus, the controller 6 can receive the inlet temperature of the evaporator 34 detected by the first temperature sensor 4 and can also control the rotation speed of the condensing fan 37 .

[0060] In some embodiments, the controller 6 is configured to: when the refrigeration system 3 is running, receive the inlet temperature of the evaporator 34 detected by the first temperature sensor 4, and calculate the rate of change of the inlet temperature of the evaporator 34; and adjust at least one of the speed of the condensing fan 37 or the speed of the compressor 31 according to the rate of change.

[0061] It should be noted that the frequency of the compressor 31 is adjustable, as is the frequency of the condensing fan 37. When the temperature of the first chamber 111 and the temperature of the second chamber 112 are respectively less than or equal to the first preset temperature and the second preset temperature, the controller 6 can control the compressor 31 and the condensing fan 37 to stop, thereby reducing the energy consumption of the refrigerator 1000.

[0062] When the temperature of at least one of the first chamber 111 or the second chamber 112 increases to a preset temperature that requires cooling, the controller 6 controls the operation of the compressor 31. In other words, the controller 6 controls the operation of the refrigeration system 3. At this time, the condensing fan 37 can be turned on according to actual needs. For example, the condensing fan 37 can be turned on and off according to the temperature of the first condenser 32, and the frequency of the condensing fan 37 can be adjusted.

[0063] When the refrigeration system 3 is in operation, the change rate of the inlet temperature of the evaporator 34 can be calculated by detecting the inlet temperature of the evaporator 34 .

[0064] It should be noted that if the rate of increase of the inlet temperature of the evaporator 34 is too fast, it indicates that the refrigeration effect of the refrigeration system 3 is reduced. At this time, the controller 6 can increase the speed of the condensing fan 37 or at least one of the speeds of the compressor 31 according to the change rate of the inlet temperature of the evaporator 34 to improve the refrigeration effect of the refrigeration system 3, thereby reducing the temperature of the second chamber 112 and the first chamber 111 to the target temperature in a relatively short time. Then, the controller 6 controls to reduce the speed of the condensing fan 37 or at least one of the speeds of the compressor 31, thereby avoiding long-term high-power operation of at least one of the condensing fan 37 or the compressor 31, reducing the energy consumption of the refrigerator 1000, and improving the energy efficiency of the refrigerator 1000.

[0065] If the rate of decrease of the inlet temperature of the evaporator 34 is too fast, it indicates that the refrigeration efficiency of the refrigeration system 3 is too high. At this time, the controller 6 can reduce at least one of the speed of the condensing fan 37 or the speed of the compressor 31 according to the rate of change of the inlet temperature of the evaporator 34 to reduce the refrigeration efficiency of the refrigeration system 3, thereby reducing the energy consumption of the refrigerator 1000 and improving the energy efficiency of the refrigerator 1000.

[0066] The operation of the refrigeration system 3 refers to the operation of the compressor 31, and the condensing fan 37 can be turned on as needed. The speed of the compressor 31 when it starts can be set according to the power-on rate of the refrigerator 1000. In some embodiments, the controller 6 is further configured to control the compressor 31 to operate at the preset startup speed based on the corresponding relationship between the power-on rate of the compressor 31 and the preset startup speed of the compressor 31.

[0067] In some embodiments, the correspondence between the on-rate of the compressor 31 and the preset starting speed of the compressor 31 can be: when the on-rate is greater than 90%, the preset starting speed is 4200r / min; when the on-rate is any value in [80%, 90%), the preset starting speed is 3900r / min; when the on-rate is any value in [60%, 80%), the preset starting speed is 3000r / min; when the on-rate is any value in [50%, 60%), the preset starting speed is 2400r / min; when the on-rate is any value in [30%, 50%), the preset starting speed is 2000r / min; when the on-rate is less than 30%, the preset starting speed is 1200r / min.

[0068] In some embodiments, after turning on the compressor 31, the controller 6 can also adjust the speed of the compressor 31 again through the rate of change of the outlet temperature of the evaporator 34. In this way, the first chamber 111 and the second chamber 112 can be cooled, and the speed of the compressor 31 can meet the requirements of the refrigeration system 3 to improve the energy efficiency of the refrigerator 1000.

[0069] In some embodiments, the rate of change of the inlet temperature is positively correlated with at least one of the speed of the compressor 31 or the speed of the condensing fan 37. That is, as the rate of change of the inlet temperature increases, at least one of the speed of the compressor 31 or the speed of the condensing fan 37 increases. In this case, the controller 6 can adjust at least one of the speed of the compressor 31 or the speed of the condensing fan 37 by linearly changing the rate of change of the inlet temperature.

[0070] In other embodiments, the rate of change of the inlet temperature can also be divided into multiple ranges, each range corresponding to at least one of the speeds of the compressor 31 or the speeds of the condensing fan 37. At this time, the controller 6 can adjust at least one of the speeds of the compressor 31 or the speeds of the condensing fan 37 according to the corresponding relationship.

[0071] In some embodiments, the controller can calculate the startup rate of the compressor 31 by causing the compressor 31 to run at a set speed when the refrigerator 1000 is just powered on, and after the temperature in the first chamber 111 and the temperature in the second chamber 112 are respectively less than or equal to the first preset temperature and the second preset temperature, stably running a preset number of start and stop cycles.

[0072] For example, when refrigerator 1000 is first powered on, compressor 31 operates at 3900 rpm. When the temperature of first chamber 111 and the temperature of second chamber 112 are less than or equal to the first preset temperature and the second preset temperature, respectively, controller 6 controls compressor 31 to shut down. Then, when the temperature of at least one of the air in first chamber 111 or second chamber 112 rises to a preset temperature at which the temperature needs to be lowered, compressor 31 is restarted at 3900 rpm. This cycle continues, and compressor 31 is stably on and off for three cycles. At this point, the ratio of the sum of the operating time of compressor 31 during the three on-off cycles to the total duration of the three on-off cycles is calculated, i.e., the on-rate of compressor 31.

[0073] Here, the operating time of the compressor 31 in each start-stop cycle refers to the time during which the compressor 31 is in the running state during the start-stop cycle, and the total operating time of the compressor 31 in the three start-stop cycles refers to the sum of the time during which the compressor 31 is in the running state and the time during which it is in the shutdown state during the three start-stop cycles.

[0074] It is understood that the continued circulation of air in the refrigeration circulation air path may cause the higher temperature air in the first chamber 111 to enter the second chamber 112, thereby affecting the temperature in the second chamber 112. In some embodiments, as shown in Figure 9, the refrigeration system 3 further includes a damper 38. The damper 38 is provided at the air inlet of the first air duct 13 and is configured to open or close the air inlet of the first air duct 13.

[0075] 9 , the refrigerator 1000 further includes a second temperature sensor 113 . The second temperature sensor 113 is disposed in the first chamber 111 and is configured to detect the temperature of the first chamber 111 .

[0076] The controller 6 is coupled to the damper 38 and the second temperature sensor 113 , respectively.

[0077] In some embodiments, the controller 6 is further configured to: determine whether the temperature of the first chamber 111 detected by the second temperature sensor 113 is less than or equal to a third preset temperature of the first chamber 111; if so, control the damper 38 to close.

[0078] Here, the third preset temperature can be the minimum value in the control temperature range of the first chamber 111. For example, the control temperature range of the first chamber 111 is [2°C, 8°C], that is, the temperature of the first chamber 111 needs to be controlled within [2°C, 8°C], then the third preset temperature is 2°C.

[0079] When the temperature in the first chamber 111 is less than or equal to the third preset temperature, the controller 6 can control the damper 38 to close to prevent the air in the first chamber 111 from circulating in the refrigerated circulation air path, and to prevent the higher temperature air in the first chamber 111 from entering the second chamber 112 and affecting the temperature of the second chamber 112.

[0080] In some embodiments, the controller 6 is further configured to: when the refrigeration system 3 is running, determine whether the temperature of the first chamber 111 detected by the second temperature sensor 113 is greater than or equal to a first preset temperature; if so, control the damper 38 to open.

[0081] Here, the first preset temperature is the preset temperature at which the first chamber 111 needs to be cooled. In some embodiments, the first preset temperature can be the maximum value in the control temperature range of the first chamber 111. For example, the control temperature range of the first chamber 111 is [2°C, 8°C], that is, the temperature of the first chamber 111 needs to be controlled within [2°C, 8°C], then the first preset temperature is 8°C.

[0082] When the temperature in the first chamber 111 rises to a first preset temperature, the controller 6 opens the damper 38 to allow the air in the second air duct 12 to enter the refrigerated circulation air path and circulate in the refrigerated circulation air path to lower the temperature in the first chamber 111.

[0083] At this time, when the damper 38 is open, in order to adjust at least one of the speed of the condensing fan 37 or the speed of the compressor 31 according to the rate of change, the controller 6 is also configured to: determine whether the inlet temperature of the evaporator 34 has risen; if it is determined that the inlet temperature has risen, determine whether the heating rate of the inlet temperature is greater than the first preset rate; if it is determined that the heating rate of the inlet temperature is greater than the first preset rate, control the speed of the compressor 31 to increase by the first preset speed; if it is determined that the heating rate of the inlet temperature is less than or equal to the first preset rate, control the speed of the condensing fan 37 to increase by the second preset speed.

[0084] In some embodiments, the second predetermined rotational speed is less than the first predetermined rotational speed.

[0085] In this way, it is possible to prevent the temperature in the first chamber 111 from having an excessive impact on the temperature in the second chamber 112 .

[0086] It should be noted that whether the inlet temperature of the evaporator 34 has increased can be determined based on the calculated rate of change of the inlet temperature. For example, if the rate of change is greater than 0°C / min, it indicates that the inlet temperature has increased. If the rate of increase is less than or equal to 0°C / min, it indicates that the inlet temperature has not increased.

[0087] In some embodiments, the first preset rate, the first preset rotational speed, and the second preset rotational speed can be set according to the actual conditions of the refrigerator 1000. For example, the first preset rate can be any value in the range of [0.1°C / min, 0.5°C / min], for example, the first preset rate can be 0.2°C / min or 0.3°C / min. The first preset rotational speed can be any value in the range of [300r / min, 500r / min], for example, the first preset rotational speed can be 300r / min or 400r / min. The second preset rotational speed can be any value in the range of [100r / min, 200r / min], for example, the second preset rotational speed can be 150r / min or 200r / min.

[0088] When the damper 38 meets the opening conditions, that is, when the temperature of the first chamber 111 is high, the controller 6 controls the damper 38 to open, and the air with a higher temperature in the first chamber 111 will flow in the refrigerated circulation air path, that is, the air with a higher temperature in the first chamber 111 will enter the second air duct 12 and come into contact with the evaporator 34, which may cause the temperature of the evaporator 34 to rise.

[0089] If the temperature of the evaporator 34 rises too quickly and the air in the first chamber 111 flows into the second chamber 112, the temperature in the second chamber 112 will rise again. If the temperature in the second chamber 112 rises significantly, the refrigerator 1000 will need to cool the first chamber 111 and output more cooling capacity to adjust the temperature of the second chamber 112, which will increase the energy consumption of the refrigerator 1000.

[0090] After the damper 38 is opened, the refrigeration effect of the cold system can be improved by increasing the rotation speed of the compressor 31, so that the temperature of the first chamber 111 can be reduced to reduce the impact of the air in the first chamber 111 on the temperature of the second chamber 112, thereby increasing the energy efficiency of the refrigerator 1000.

[0091] By increasing the rotation speed of the condensing fan 37, the heat dissipation effect on the first condenser 32 can be increased, thereby increasing the condensation effect of the first condenser 32, and then improving the refrigeration effect of the refrigeration system 3, so that the temperature of the first chamber 111 is reduced, thereby reducing the impact of the air in the first chamber 111 on the temperature of the second chamber 112, and increasing the energy efficiency of the refrigerator 1000.

[0092] Since the power of the compressor 31 is usually greater than the power of the condensing fan 37, the speed of the compressor 31 or the speed of the condensing fan 37 is increased by selecting different heating rates of the inlet temperature of the evaporator 34, thereby ensuring the refrigeration effect of the refrigeration system 3 and reducing the energy consumption of the refrigerator 1000.

[0093] Furthermore, when determining whether the inlet temperature is rising, if it is determined that the inlet temperature is unchanged or decreasing, it indicates that the cooling capacity output by the refrigeration system 3 can meet the needs of the refrigerator 1000. In this case, the controller 6 controls the speed of the condensing fan 37 or the speed of the compressor 31 to remain unchanged. Furthermore, the inlet temperature can be cyclically detected according to a preset period and determined whether the inlet temperature is rising, so as to promptly detect the rise in the inlet temperature and promptly determine whether the rate of increase in the inlet temperature is greater than a first preset rate.

[0094] In some embodiments, the controller 6 is further configured to determine whether the heating rate is greater than a first preset rate every first preset time period, and adjust the speed of the condensing fan 37 or the speed of the compressor 31. When it is detected that the inlet temperature stops rising, the controller 6 stops adjusting the speed of the condensing fan 37 or the speed of the compressor 31.

[0095] Here, the first preset time length can be set according to the actual situation of the refrigerator 1000. For example, the first preset time length can be any value in [3min, 10min]. For example, the first preset time length can be 4min, 5min or 6min.

[0096] In this way, the energy efficiency of the refrigerator 1000 can be further improved.

[0097] That is, the controller 6 detects the inlet temperature of the evaporator 34 at a predetermined cycle and determines whether the rate of increase of the inlet temperature is greater than a first predetermined rate. For each detection, if the rate of increase is greater than the first predetermined rate, the speed of the compressor 31 is increased by the first predetermined rate. If the rate of increase is less than or equal to the first predetermined rate, the speed of the condensing fan 37 is increased by the first predetermined rate. The controller 6 stops adjusting the speed of the compressor 31 or the speed of the condensing fan 37 until the inlet temperature of the evaporator 34 stops rising, that is, when the rate of increase of the inlet temperature of the evaporator 34 reaches zero.

[0098] In this way, after the inlet temperature of the evaporator 34 rises, the speed of the compressor 31 or the speed of the condensing fan 37 can be adjusted according to the change in the heating rate, so as to slow down the heating rate of the evaporator 34, thereby lowering the temperature of the first chamber 111 and slowing down the recovery of the temperature of the second chamber 112, so as to improve the energy efficiency of the refrigerator 1000.

[0099] In some embodiments, after the temperature of the evaporator 34 stops rising, the temperature of the first chamber 111 decreases. When the temperature of the first chamber 111 decreases to a value less than or equal to a first preset temperature of the first chamber 111, the controller 6 controls the damper 38 to close. After the damper 38 closes, the air in the first chamber 111 no longer circulates within the refrigeration circuit, and thus the temperature of the evaporator 34 decreases.

[0100] At this time, i.e., when damper 38 is closed, in order to adjust the speed of condensing fan 37 and / or compressor 31 according to the rate of change, controller 6 is further configured to: determine whether the inlet temperature is decreasing; if it is determined that the inlet temperature is decreasing, determine whether the rate of decrease of the inlet temperature is greater than a second preset rate; if it is determined that the rate of decrease of the inlet temperature is greater than the second preset rate, control the speed of compressor 31 to decrease by a third preset speed, and control the speed of condensing fan 37 to decrease by a fourth preset speed. Here, the rate of decrease of the inlet temperature is the absolute value of the rate of change when the inlet temperature decreases.

[0101] In some embodiments, the fourth preset rotational speed is less than the third preset rotational speed.

[0102] In this way, it is possible to avoid the compressor 31 or the condensing fan 37 continuing to operate at a high speed, thereby increasing the energy consumption of the refrigerator 1000.

[0103] It should be noted that whether the inlet temperature has dropped can be determined by calculating the rate of change of the inlet temperature. For example, if the rate of change is determined to be less than 0°C / min, it indicates that the inlet temperature has dropped. If the rate of change is determined to be greater than or equal to 0°C / min, it indicates that the inlet temperature has not dropped.

[0104] Here, the second preset speed, the third preset speed, and the fourth preset speed may be set according to actual conditions of the refrigerator 1000 .

[0105] The second preset rate may be the same as or different from the first preset rate. For example, the second preset rate may be any value in the range of [0.1°C / min, 0.5°C / min]. For example, the second preset rate may be 0.2°C / min, 0.25°C / min, or 0.3°C / min.

[0106] The third preset speed may be the same as or different from the first preset speed. For example, the third preset speed may be any value in the range [300 r / min, 500 r / min], such as 300 r / min, 350 r / min, or 400 r / min.

[0107] The fourth preset speed may be the same as or different from the second preset speed. For example, the fourth preset speed may be any value in the range [100 r / min, 200 r / min], such as 150 r / min, 200 r / min, or 250 r / min.

[0108] In some embodiments, by determining that the rate of decrease of the inlet temperature of the evaporator 34 is greater than a second preset rate, it is indicated that the cooling capacity output by the refrigeration system 3 is in excess. At this time, the rotation speed of the compressor 31 and the rotation speed of the condensing fan 37 can be reduced. While ensuring the cooling capacity output by the refrigeration system 3, the energy consumption of the compressor 31 and the condensing fan 37 is reduced, thereby reducing the energy consumption of the refrigerator 1000.

[0109] In addition, the reduction in the rotation speed of the compressor 31 and the rotation speed of the condensing fan 37 can also reduce the noise during the operation of the refrigerator 1000, thereby preventing the refrigerator 1000 from being in a noisy state for a long time, thereby improving the consumer experience.

[0110] In addition, when judging whether the inlet temperature has dropped, if it is judged that the inlet temperature remains unchanged or rises, it indicates that the output cooling capacity of the refrigeration system 3 is not excessive. At this time, the controller 6 controls the speed of the condensing fan 37 or the speed of the compressor 31 to remain unchanged. In addition, the controller 6 can detect the inlet temperature in a preset cycle and judge whether the inlet temperature has dropped, so as to promptly detect the drop in the inlet temperature and promptly judge whether the drop rate of the inlet temperature is greater than the second preset rate.

[0111] In some embodiments, as shown in FIG. 10 , the refrigerator 1000 further includes a third temperature sensor 114 . The third temperature sensor 114 is disposed in the second chamber 112 and is configured to detect the temperature in the second chamber 112 .

[0112] The controller 6 is also coupled to the third temperature sensor 114. In some embodiments, the controller 6 is further configured to: determine whether the rate of decrease is greater than a second preset rate every second preset time period, and adjust the speed of the condensing fan 37 and the speed of the compressor 31; when the inlet temperature stops decreasing and the difference between the temperature of the second chamber 112 and the inlet temperature is less than the preset temperature difference, stop adjusting the speed of the condensing fan 37 and the speed of the compressor 31.

[0113] In this way, the energy consumption of the refrigerator 1000 can be further reduced.

[0114] That is, the controller 6 detects the inlet temperature of the evaporator 34 in a cycle according to each preset period and determines whether the rate of decrease of the inlet temperature is greater than the second preset rate. For each detection, if it is determined that the rate of decrease is greater than the second preset rate, the speed of the compressor 31 is reduced by a third preset speed, and the speed of the condensing fan 37 is reduced by a fourth preset speed. The controller 6 stops adjusting the speeds of the compressor 31 and the condensing fan 37 until the inlet temperature of the evaporator 34 stops decreasing, that is, the rate of decrease of the inlet temperature of the evaporator 34 reaches 0°C / min.

[0115] In this way, after the inlet temperature of the evaporator 34 drops, the speed of the compressor 31 and the speed of the condensing fan 37 can be adjusted according to the change of the drop rate, so that the speed of the compressor 31 and the speed of the condensing fan 37 can be made smaller, so as to further reduce the energy consumption of the compressor 31 and the condensing fan 37, thereby reducing the energy consumption of the refrigerator 1000.

[0116] It should be noted that, when the decreasing rate of the inlet temperature of the evaporator 34 is less than or equal to the second preset rate, the controller 6 controls the rotation speeds of the compressor 31 and the condensing fan 37 to remain unchanged.

[0117] Here, the second preset time length can be the same as or different from the first preset time length. The first preset time length can be set according to the actual situation of refrigerator 1000. For example, the second preset time length can be any value in [3 minutes, 10 minutes]. For example, the second preset time length can be 4 minutes, 5 minutes, or 6 minutes. The preset temperature difference can be 7°C.

[0118] Some embodiments of the present disclosure further provide a refrigerator control method. As shown in FIG11 , the control method of the refrigerator 1000 includes S2000 to S2100 .

[0119] S2000: When the refrigeration system 3 is running, the inlet temperature of the evaporator 34 is obtained, and the change rate of the inlet temperature is calculated.

[0120] S2100: Adjust at least one of the rotation speed of the condensing fan 37 or the rotation speed of the compressor 31 according to the change rate.

[0121] When refrigeration system 3 cools at least one of first chamber 111 or second chamber 112, air circulates within at least one of the refrigeration circulation air path or the freezing circulation air path, causing the inlet temperature of evaporator 34 to change. Therefore, by adjusting at least one of the speed of compressor 31 or the speed of condensing fan 37 based on the rate of change of the inlet temperature of evaporator 34, the cooling capacity output by refrigeration system 3 can be matched to the actual cooling capacity required by refrigerator 1000.

[0122] In this way, it is possible to avoid the rotational speed of the compressor 31 or the rotational speed of the condensing fan 37 from being too high, which would cause the energy consumption of at least one of the compressor 31 or the condensing fan 37 to be too high, or to avoid the rotational speed of the compressor 31 or the rotational speed of the condensing fan 37 from being too low, which would cause at least one of the compressor 31 or the condensing fan 37 to run for a long time, thereby reducing the energy consumption of at least one of the compressor 31 or the condensing fan 37, reducing the energy consumption of the refrigerator 1000, and improving the energy efficiency of the refrigerator 1000.

[0123] In some embodiments, when cooling is required for the first chamber 111, the controller 6 controls the damper 38 to open. At this time, as shown in FIG12 , S2100 (adjusting at least one of the rotation speed of the condensing fan 37 or the rotation speed of the compressor 31 according to the rate of change) includes S2110 to S2114.

[0124] S2110: Determine whether the inlet temperature rises. If so, execute S2111; if not, execute S2112.

[0125] S2111: Determine whether the heating rate of the inlet temperature is greater than a first preset rate. If so, execute S2113; if not, execute S2114.

[0126] S2112: Control the rotation speed of the condensing fan 37 or the rotation speed of the compressor 31 to remain unchanged.

[0127] S2113: Control the speed of the compressor 31 to increase to a first preset speed.

[0128] S2114: Control the rotation speed of the condensing fan 37 to increase to a second preset rotation speed.

[0129] In some embodiments, for example, the first preset rate is 0.2°C / min, the first preset rotation speed is 300 rpm, and the second preset rotation speed is 150 rpm. As shown in FIG13 , the entire control process of the compressor 31 or the condensing fan 37 includes steps S0a to S24a.

[0130] S0a: Control the damper 38 to open.

[0131] S1a: Acquire the inlet temperature of the evaporator 34 and calculate the heating rate of the inlet temperature.

[0132] S21a: Determine whether the inlet temperature rises. If so, execute S22a; if not, execute S24a1.

[0133] S22a: Determine whether the heating rate of the inlet temperature is greater than 0.2°C / min. If so, execute S231a; if not, execute S232a.

[0134] S231a: Increase the speed of the compressor 31 by 300 r / min;

[0135] S232a: Increase the rotation speed of the condensing fan 37 by 150 r / min.

[0136] S24a1: Stop adjusting the rotation speed of the condensing fan 37 or the rotation speed of the compressor 31.

[0137] In some embodiments, the control method also includes: determining whether the heating rate is greater than the first preset rate once every first preset time period, and adjusting the speed of the condensing fan 37 or the speed of the compressor 31 once; when it is detected that the inlet temperature stops rising, stop adjusting the speed of the condensing fan 37 or the speed of the compressor 31.

[0138] In some embodiments, for example, the first preset rate is 0.2°C / min, the first preset speed is 300 rpm, the second preset speed is 150 rpm, and the first preset duration is 5 minutes. At this time, as shown in FIG14 , the entire control process of the compressor 31 or the condensing fan 37 includes S0a to S24a.

[0139] S0a: Control the damper 38 to open.

[0140] S1a: Acquire the inlet temperature of the evaporator 34 and calculate the heating rate of the inlet temperature.

[0141] S21a: Determine whether the inlet temperature rises. If so, execute S22a; if not, execute S24a1.

[0142] S22a: Determine whether the heating rate of the inlet temperature is greater than 0.2°C / min. If so, execute S231a; if not, execute S232a.

[0143] S231a: Increase the rotation speed of the compressor 31 by 300 r / min.

[0144] S232a: Increase the rotation speed of the condensing fan 37 by 150 r / min.

[0145] The above steps S21a, S22a, S231a and S232a are repeated every 5 minutes until step S24a2.

[0146] S24a2: When it is detected that the inlet temperature stops rising, the adjustment of the rotation speed of the condensing fan 37 or the rotation speed of the compressor 31 is stopped.

[0147] In some embodiments, after cooling the first chamber 111, the controller 6 controls the damper 38 to close. At this time, as shown in FIG15 , adjusting at least one of the speed of the condensing fan 37 or the speed of the compressor 31 according to the change rate includes S2200 to S2220.

[0148] S2200: Determine whether the inlet temperature has dropped. If so, execute S2210; if not, execute S2220.

[0149] S2210: Determine whether the rate of decrease of the inlet temperature is greater than a second preset rate. If so, execute S2211; if not, execute S2220.

[0150] S2211: Control the rotation speed of the condensing fan 37 to decrease to a third preset rotation speed, and control the rotation speed of the compressor 31 to decrease to a fourth preset rotation speed.

[0151] S2220: Control the rotation speed of the condensing fan 37 or the rotation speed of the compressor 31 to remain unchanged.

[0152] By determining that the rate of decrease of the inlet temperature of the evaporator 34 is greater than the second preset rate, it indicates that the cooling capacity output by the refrigeration system 3 is excessive. At this time, the rotation speed of the compressor 31 and the condensing fan 37 can be reduced to ensure the cooling capacity output by the refrigeration system 3, reduce the energy consumption of the compressor 31 and the condensing fan 37, and thus reduce the energy consumption of the refrigerator 1000.

[0153] In addition, the reduction in the rotation speed of the compressor 31 and the rotation speed of the condensing fan 37 can also reduce the noise during the operation of the refrigerator 1000, thereby preventing the refrigerator 1000 from being in a noisy state for a long time, thereby improving the consumer experience.

[0154] In some embodiments, for example, the second preset rate is 0.2°C / min, the third preset speed is 300 rpm, and the fourth preset speed is 150 rpm. As shown in FIG16 , the entire control process of the compressor 31 or the condensing fan 37 includes steps S0b to S232b.

[0155] S0b: Control the damper 38 to close.

[0156] S1b: Obtain the inlet temperature of the evaporator 34 and calculate the cooling rate of the inlet temperature.

[0157] S21b: Determine whether the inlet temperature has dropped. If so, execute S22b; if not, execute S232b.

[0158] S22b: Determine whether the decreasing rate of the inlet temperature is greater than 0.2°C / min. If so, execute S231b; if not, execute S232b.

[0159] S231b: Reduce the rotation speed of the compressor 31 by 300 r / min, and reduce the rotation speed of the condensing fan 37 by 150 r / min.

[0160] S232b: Stop adjusting the rotation speed of the compressor 31 and the rotation speed of the condensing fan 37.

[0161] In some embodiments, the control method also includes: determining whether the descent rate is greater than a second preset rate every second preset time period, and adjusting the speed of the condensing fan 37 and the speed of the compressor 31 once; when the inlet temperature stops dropping and the difference between the temperature of the second chamber 112 and the inlet temperature is less than the preset temperature difference, stop adjusting the speed of the condensing fan 37 and the speed of the compressor 31.

[0162] In some embodiments, for example, the second preset rate is 0.2°C / min, the third preset rotation speed is 300r / min, the fourth preset rotation speed is 150r / min, the second preset time is 5min, and the preset temperature difference is 7°C.

[0163] At this time, as shown in FIG. 17 , the entire control process of the compressor 31 or the condensing fan 37 includes steps S0b to S24b.

[0164] S0b: Control the damper 38 to close.

[0165] S1b: Obtain the inlet temperature of the evaporator 34 and calculate the cooling rate of the inlet temperature.

[0166] S21b: Determine whether the inlet temperature has dropped. If so, execute S22b; if not, execute S232b.

[0167] S22b: Determine whether the decreasing rate of the inlet temperature is greater than 0.2°C / min. If so, execute S231b; if not, execute S232b.

[0168] S231b: Reduce the speed of the compressor 31 by 300 rpm and reduce the speed of the condensing fan 37 by 150 rpm;

[0169] S232b: Stop adjusting the rotation speed of the compressor 31 and the rotation speed of the condensing fan 37.

[0170] The above steps S21b, S22b and S23b are repeated every 5 minutes until step S24b.

[0171] S24b: When the inlet temperature stops decreasing and the difference between the temperature of the second chamber 112 and the inlet temperature is less than 7° C., the rotation speeds of the condensing fan 37 and the compressor 31 are stopped from being adjusted.

[0172] In some embodiments, as shown in FIG. 18 , during the entire process of the refrigerator 1000 cooling the first chamber 111 , the process of controlling at least one of the compressor 31 or the condensing fan 37 includes steps S3000 to S4500 .

[0173] S3000: Control the damper 38 to open.

[0174] S3100: Obtain the inlet temperature of the evaporator 34 and calculate the heating rate of the inlet temperature.

[0175] S3200: Determine whether the inlet temperature rises. If so, execute S3300; if not, execute S3210.

[0176] S3210: Stop adjusting the speed of the condensing fan 37 or the speed of the compressor 31.

[0177] S3300: Determine whether the heating rate of the inlet temperature is greater than a first preset rate. If so, execute S3310; if not, execute S3320.

[0178] S3310: Control the speed of the compressor 31 to increase to a first preset speed.

[0179] S3320: Control the rotation speed of the condensing fan 37 to increase to a second preset rotation speed.

[0180] The above steps S3200, S3300, S3310 and S3320 are repeated at intervals of the first preset time until step S4000.

[0181] S4000: When it is detected that the inlet temperature stops rising, the adjustment of the rotation speed of the condensing fan 37 or the rotation speed of the compressor 31 is stopped.

[0182] S4100: Determine whether the temperature of the first chamber 111 is less than or equal to the second preset temperature of the first chamber 111. If so, execute S4200; if not, continue to execute S4100.

[0183] S4200, control the damper 38 to close.

[0184] S4300: Acquire the inlet temperature of the evaporator 34 and calculate the cooling rate of the inlet temperature.

[0185] S4400: Determine whether the inlet temperature has dropped. If so, execute S4410; if not, execute S4412.

[0186] S4410: Determine whether the rate of decrease of the inlet temperature is greater than a second preset rate. If so, execute S4411; if not, execute S4412.

[0187] S4411: Controlling the speed of the compressor 31 to decrease by a third preset speed, and controlling the speed of the condensing fan 37 to decrease by a fourth preset speed;

[0188] S4412: Stop adjusting the rotation speed of the compressor 31 and the rotation speed of the condensing fan 37.

[0189] The above steps S4400, S4410 and S4411 are repeated at intervals of a fourth preset time length until step S4500.

[0190] S4500: When the inlet temperature stops decreasing and the difference between the temperature of the second chamber 112 and the inlet temperature is less than the preset temperature difference, stop adjusting the rotation speeds of the condensing fan 37 and the compressor 31.

[0191] It should be noted that any one of the technical solutions disclosed in the present disclosure can, to a certain extent, solve one or more of the above-mentioned technical problems and achieve certain disclosure purposes; multiple technical disclosures can also be combined into an overall solution to solve one or more of the above-mentioned technical problems and achieve certain disclosure purposes; some technical disclosures can also be selected to be combined into an overall solution, while adopting related technologies and inferior solutions, but the inferior trend can be compensated by the means disclosed in this technology, and the above-mentioned one or more technical problems can be solved to a certain extent as a whole and certain disclosure purposes can be achieved; each technical disclosure combined into a complete technical solution constitutes an organic and inseparable overall solution, which solves technical problems as a whole and achieves certain disclosure purposes.

[0192] Any technical disclosure in this disclosure, as well as the recombination of multiple technical disclosures, can form a complete technical solution and can solve one or more of the above-mentioned technical problems and achieve the purpose of disclosure. They all belong to the content of this disclosure and are the content that is directly and unambiguously determined based on the content of this disclosure.

[0193] Those skilled in the art will understand that the scope of the present disclosure is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present application. The scope of the present application is limited by the appended claims.

Claims

1. A refrigerator, comprising: Box; A door body connected to the box body; A refrigeration system is arranged in the box, and the refrigeration system includes: compressor; The first condenser; a throttling device; A second condenser is arranged between the first condenser and the throttling device; Evaporator; A condensing fan, the condensing fan is disposed on one side of the first condenser and can blow air to the first condenser; A first temperature sensor is provided at the inlet of the evaporator, and the first temperature sensor is able to detect the inlet temperature of the evaporator; and A controller is coupled to the compressor, the first condenser, the second condenser, the throttling device, the evaporator, the condensing fan and the first temperature sensor, and is configured as follows: In the case where the refrigeration system is operated, the inlet temperature detected by the first temperature sensor is obtained, and the rate of change of the inlet temperature is calculated; At least one of the rotational speed of the condensing fan or the rotational speed of the compressor is adjusted according to the rate of change; Wherein, the rate of change is positively correlated with at least one of the rotational speed of the condensing fan or the rotational speed of the compressor.

2. The refrigerator according to claim 1, wherein: A first chamber and a first air duct are formed in the box, and the first air duct is in communication with the first chamber; The refrigeration system further includes a damper, which is arranged at the air inlet of the first air duct and can open or close the air inlet of the first air duct; The controller is also coupled to the damper; when the damper is open, the controller performs at least one of adjusting the speed of the condensing fan or the speed of the compressor according to the change rate, and is further configured as: If it is determined that the inlet temperature rises and the temperature increase rate of the inlet temperature is greater than the first preset rate, the rotation speed of the compressor is controlled to increase the first preset speed; If it is determined that the inlet temperature rises, and it is determined that the temperature increase rate of the inlet temperature is less than or equal to the first preset rate, the rotation speed of the condensing fan is controlled to increase the second preset speed.

3. The refrigerator according to claim 2, wherein: The controller is also configured to: Each time the first preset time length determines whether the heating rate is greater than the first preset speed, and adjusts one of the rotation speed of the condensing fan and the rotation speed of the compressor; If it is determined that the inlet temperature stops rising, the rotation speed of the condensing fan and the rotation speed of the compressor are stopped.

4. The refrigerator according to claim 2 or 3, further comprising: The second temperature sensor is arranged in the first chamber and can detect the temperature of the first chamber; The controller is coupled to the second temperature sensor, and the controller is further configured to: If it is determined that the temperature of the first chamber detected by the second temperature sensor is less than or equal to the set temperature of the first chamber, the damper is controlled to close.

5. The refrigerator according to claim 4, wherein: The controller is also configured to: If it is determined that the temperature detected by the second temperature sensor is greater than or equal to the first preset temperature, the damper is controlled to open.

6. The refrigerator according to claim 2 or 3, wherein: When the damper is closed, the controller performs at least one of adjusting the rotation speed of the condensing fan or the rotation speed of the compressor according to the change rate, and is further configured as follows: If it is determined that the inlet temperature decreases, and it is determined that the decrease rate of the inlet temperature is greater than the second preset rate, the speed of the compressor is controlled to decrease by a third preset speed, and the speed of the condensing fan is controlled to decrease by a fourth preset speed.

7. The refrigerator according to claim 6, wherein: The refrigerator further comprises a third temperature sensor, which is disposed in the second chamber and is capable of detecting the temperature in the second chamber; The controller is also coupled to the third temperature sensor, and the controller is further configured to: Determine once every second preset time whether the decreasing rate is greater than the second preset rate, and adjust the speed of the condensing fan and the speed of the compressor; If it is determined that the inlet temperature stops decreasing and the difference between the temperature of the second chamber and the inlet temperature is less than a preset temperature difference, the rotation speeds of the condensing fan and the compressor are stopped from being adjusted.

8. The refrigerator according to any one of claims 1 to 7, wherein: The controller is also configured to: According to the corresponding relationship between the startup rate of the compressor and the preset startup speed of the compressor, the compressor is controlled to operate at the preset startup speed to operate the refrigeration system.

9. A method for controlling a refrigerator, wherein: The refrigerator comprises: A box body, wherein a first chamber, a second chamber, a second air duct and a first air duct are formed in the box body; the return air port of the second air duct and the air outlet of the second air duct are respectively connected to the second chamber, the air inlet of the first air duct is connected to the air outlet of the second air duct, the air outlet of the first air duct is connected to the first chamber, and the first chamber is connected to the return air port of the second air duct; A door body connected to the box body; A refrigeration system is arranged in the box, and the refrigeration system comprises: compressor; First condenser; Throttling device; an evaporator, disposed in the second air duct; a condensing fan, the condensing fan being capable of blowing air toward the first condenser; A first temperature sensor is provided at the inlet of the evaporator, and the second temperature sensor is capable of detecting the inlet temperature of the evaporator; a damper, disposed at the air inlet of the first air duct, capable of opening or closing the air inlet of the first air duct; and The control method comprises: When the refrigeration system is running, obtaining the inlet temperature detected by the first temperature sensor, and calculating the rate of change of the inlet temperature; adjusting at least one of the rotation speed of the condensing fan or the rotation speed of the compressor according to the change rate; When the damper is open, if it is determined that the inlet temperature rises, and it is determined that the rate of increase of the inlet temperature is greater than the first preset rate, controlling the speed of the compressor to increase by the first preset speed; When the damper is open, if it is determined that the inlet temperature rises, and it is determined that the rate of increase of the inlet temperature is less than or equal to the first preset rate, the speed of the condensing fan is controlled to increase by a second preset speed.

10. The control method according to claim 9, further comprising: Determine once every first preset time whether the heating rate is greater than the first preset rate, and adjust once the rotation speed of the condensing fan and the rotation speed of the compressor; If it is determined that the inlet temperature stops rising, the adjustment of the rotation speed of the condensing fan and the rotation speed of the compressor is stopped.

11. The control method according to claim 9 or 10, wherein: The refrigerator further includes a second temperature sensor, which is disposed in the first chamber and is capable of detecting the temperature of the first chamber; The control method further includes: if it is determined that the temperature of the first chamber detected by the second temperature sensor is less than or equal to a set temperature of the first chamber, controlling the damper to close.

12. The control method according to claim 9 or 10, wherein: When the damper is closed, adjusting at least one of the rotation speed of the condensing fan or the rotation speed of the compressor according to the change rate includes: If it is determined that the inlet temperature decreases, and it is determined that the decreasing rate of the inlet temperature is greater than the second preset rate, the control The speed of the cooling fan is reduced by a third preset speed, and the speed of the compressor is controlled to reduce by a fourth preset speed.

13. The control method according to claim 12, wherein: The refrigerator further comprises a third temperature sensor, which is disposed in the second chamber and is capable of detecting the temperature in the second chamber; The control method further comprises: Determine once every second preset time whether the decreasing rate is greater than the second preset rate, and adjust the speed of the condensing fan and the speed of the compressor; If it is determined that the inlet temperature stops decreasing and the difference between the temperature of the second chamber and the inlet temperature is less than a preset temperature difference, the rotation speeds of the condensing fan and the compressor are stopped from being adjusted.

14. The control method according to any one of claims 9 to 13, further comprising: According to the corresponding relationship between the startup rate of the compressor and the preset startup speed of the compressor, the compressor is controlled to operate at the preset startup speed to operate the refrigeration system.

15. The control method according to claim 9, wherein: The change rate is positively correlated with at least one of the rotation speed of the compressor or the rotation speed of the condensing fan; The control method further includes: adjusting at least one of the rotation speed of the compressor or the rotation speed of the condensing fan by linearly changing the change rate.

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