A refrigerator and a method for compensating the temperature of the refrigerating chamber of the refrigerator

Abstract

The present invention discloses a refrigerator and a method for compensating the temperature of a refrigerator compartment. The refrigerator includes: a refrigerator compartment and a freezer compartment, wherein the freezer compartment is located below the refrigerator compartment; a tilting beam located on the return air duct of the refrigerator compartment, wherein the return air duct is located at the bottom of the refrigerator compartment, and an anti-condensation heater is provided on the tilting beam for heating the surface temperature of the tilting beam to prevent condensation on the surface of the tilting beam; and an environmental sensor for collecting environmental temperature and relative humidity. The operating state of the anti-condensation heater is controlled based on the environmental temperature and relative humidity by obtaining the environmental temperature and relative humidity currently collected by the environmental sensor to provide compensatory heating for the refrigerator compartment. The present invention can intelligently control the operating state of the anti-condensation heater of the tilting beam in the refrigerator compartment, provide compensatory heating for the refrigerator compartment, prevent the bottom temperature of the refrigerator compartment from being low, and improve the economy and safety reliability of the refrigerator.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerator control, and in particular to a refrigerator and a method for compensating the temperature of a refrigerator compartment. Background Art

[0002] As people's living standards improve, air-cooled refrigerators are increasingly entering households. Single-system, cross-door air-cooled refrigerators, in particular, are gaining a growing market share due to their larger capacity, numerous compartments, convenient food storage and access, and high cost-effectiveness. The evaporator in this type of refrigerator is typically placed in the freezer compartment at the bottom of the refrigerator. A refrigeration fan delivers cold air from the freezer to the refrigerator compartment through a cooling duct, ensuring proper cooling of the refrigerator compartment. However, this type of refrigerator cannot avoid cold air leaking between the freezer and refrigerator compartment, and between the air duct and refrigerator compartment, leading to low temperatures at the bottom of the refrigerator compartment. This can cause the room temperature in the bottom of the refrigerator compartment to drop too low, freezing vegetables, fruits, and other ingredients stored in the bottom drawer of the refrigerator compartment, affecting normal use.

[0003] To solve the problem of low bottom temperature of the refrigerator in single-system air-cooled cross-door refrigerators under low temperature conditions, the industry usually adopts the method of thickening the insulation layer and air duct foam between the refrigerator and freezer to reduce the cold penetration between the freezer and refrigerator, and the refrigerator air duct and refrigerator; or add a compensating heating wire at the bottom of the refrigerator, turn on the temperature compensation heating wire at low ambient temperature, increase the bottom temperature of the refrigerator, and improve the problem of negative temperature freezing in the refrigerator under low ambient temperature.

[0004] However, the inventors found that the existing technology has at least the following problems: the solution of thickening the insulation layer and air duct foam between the refrigerator and freezer compartments usually sacrifices the effective storage volume of the refrigerator, reduces the refrigerator volume ratio, increases the refrigerator's external dimensions, and increases the refrigerator cost; the solution of adding compensating heating wires at the bottom of the refrigerator's refrigerator compartment to improve the low temperature at the bottom of the refrigerator compartment not only increases costs and affects the refrigerator assembly efficiency, but also because the heating wires are pasted into the foam layer on the back of the refrigerator's refrigeration liner, there are safety hazards. If the heating wires are out of control and work continuously, the liner will overheat, deform, or even rupture, which is not easy to be discovered by users, posing a greater safety risk. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a refrigerator and a method for compensating the temperature of the refrigerator compartment of the refrigerator, which can intelligently control the working state of the anti-condensation heater of the flip beam in the refrigerator compartment, provide compensatory heating for the refrigerator compartment, prevent the temperature at the bottom of the refrigerator compartment from being low, and at the same time improve the economy and safety reliability of the refrigerator as a whole.

[0006] To achieve the above object, an embodiment of the present invention provides a refrigerator, comprising:

[0007] A box body, wherein a refrigerating chamber and a freezing chamber are provided inside, and the freezing chamber is arranged below the refrigerating chamber;

[0008] A flip beam is provided on the return air duct of the refrigerating chamber, the return air duct is provided at the bottom of the refrigerating chamber, and an anti-condensation heater is provided on the flip beam to heat the surface temperature of the flip beam to prevent condensation from forming on the surface of the flip beam;

[0009] An environmental sensor is provided on the box body and is used to collect ambient temperature and relative humidity;

[0010] A controller is connected to the environmental sensor and the anti-condensation heater, and is used to:

[0011] Obtaining the ambient temperature and relative humidity currently collected by the environmental sensor;

[0012] The working state of the anti-condensation heater is controlled according to the ambient temperature and the ambient relative humidity to perform compensation heating on the refrigeration chamber.

[0013] As an improvement to the above solution, the anti-condensation heater is a heating wire, which is attached to the flip beam in a spiral shape, and the spiral density of the heating wire gradually increases from top to bottom along the flip beam;

[0014] Alternatively, the anti-condensation heater is a plurality of heating units, and the plurality of heating units are arranged at intervals on the flip beam, and the distance between two adjacent heating units gradually decreases from top to bottom along the flip beam.

[0015] As an improvement to the above solution, controlling the working state of the anti-condensation heater according to the ambient temperature and the ambient relative humidity to provide compensatory heating to the bottom of the refrigeration chamber specifically includes:

[0016] determining a target control mode for the anti-condensation heater according to the ambient temperature;

[0017] According to a preset correspondence between the control mode and the input voltage, the input voltage corresponding to the target control mode is obtained as a target input voltage value, and the anti-condensation heater is powered according to the target input voltage value;

[0018] determining, according to the ambient temperature and the ambient relative humidity, an on-rate of the anti-condensation heater in each on-off cycle as a target on-rate;

[0019] The anti-condensation heater is controlled to operate according to the target start-up rate in each start-stop cycle.

[0020] As an improvement to the above solution, if the control mode is a high temperature control mode, a medium temperature control mode, or a low temperature control mode, then determining the target control mode of the anti-condensation heater according to the ambient temperature specifically includes:

[0021] If the values of the N currently continuously collected ambient temperatures all meet or exceed a first temperature threshold, determining that the target control mode of the anti-condensation heater is a high-temperature control mode;

[0022] If the values of the N currently continuously collected ambient temperatures all satisfy a condition that is less than the first temperature threshold and greater than or equal to the second temperature threshold, determining that the target control mode of the anti-condensation heater is the medium temperature control mode;

[0023] If the values of the N currently continuously collected ambient temperatures all meet the requirement of being less than the second temperature threshold, determining that the target control mode of the anti-condensation heater is the low-temperature control mode;

[0024] Wherein, N≥1, and the first temperature threshold is greater than the second temperature threshold.

[0025] As an improvement to the above solution, determining the on-time rate of the anti-condensation heater in each on-off cycle as the target on-time rate according to the ambient temperature and the ambient relative humidity specifically includes:

[0026] Calculate the average value of the M ambient temperatures collected continuously as the average ambient temperature;

[0027] Calculate the average value of the M continuously collected ambient relative humidity values as the average ambient relative humidity;

[0028] According to the preset correspondence between the ambient temperature, ambient relative humidity and the power-on rate, obtaining the power-on rate corresponding to the average ambient temperature and the average ambient relative humidity as the target power-on rate;

[0029] Among them, M≥1; in the corresponding relationship between the preset ambient temperature, ambient relative humidity and power-on rate, at the same ambient relative humidity, the power-on rate is negatively correlated with the ambient temperature, and at the same ambient temperature, the power-on rate is positively correlated with the ambient relative humidity.

[0030] An embodiment of the present invention further provides a method for compensating the temperature of a refrigerator compartment of a refrigerator, the refrigerator comprising:

[0031] A refrigerating chamber and a freezing chamber, wherein the freezing chamber is arranged below the refrigerating chamber;

[0032] A flip beam is provided on the return air duct of the refrigerating chamber, the return air duct is provided at the bottom of the refrigerating chamber, and an anti-condensation heater is provided on the flip beam to heat the surface temperature of the flip beam to prevent condensation from forming on the surface of the flip beam;

[0033] The method comprises:

[0034] Collect the current ambient temperature and relative humidity;

[0035] The working state of the anti-condensation heater is controlled according to the ambient temperature and the ambient relative humidity to perform compensation heating on the refrigeration chamber.

[0036] As an improvement to the above solution, the anti-condensation heater is a heating wire, which is attached to the flip beam in a spiral shape, and the spiral density of the heating wire gradually increases from top to bottom along the flip beam;

[0037] Alternatively, the anti-condensation heater is a plurality of heating units, and the plurality of heating units are arranged at intervals on the flip beam, and the distance between two adjacent heating units gradually decreases from top to bottom along the flip beam.

[0038] As an improvement to the above solution, controlling the working state of the anti-condensation heater according to the ambient temperature and the ambient relative humidity to provide compensatory heating to the bottom of the refrigeration chamber specifically includes:

[0039] determining a target control mode for the anti-condensation heater according to the ambient temperature;

[0040] According to a preset correspondence between the control mode and the input voltage, the input voltage corresponding to the target control mode is obtained as a target input voltage value, and the anti-condensation heater is powered according to the target input voltage value;

[0041] determining, according to the ambient temperature and the ambient relative humidity, an on-rate of the anti-condensation heater in each on-off cycle as a target on-rate;

[0042] The anti-condensation heater is controlled to operate according to the target start-up rate in each start-stop cycle.

[0043] As an improvement to the above solution, if the control mode is a high temperature control mode, a medium temperature control mode, or a low temperature control mode, then determining the target control mode of the anti-condensation heater according to the ambient temperature specifically includes:

[0044] If the values of the N currently continuously collected ambient temperatures all meet or exceed a first temperature threshold, determining that the target control mode of the anti-condensation heater is a high-temperature control mode;

[0045] If the values of the N currently continuously collected ambient temperatures all satisfy a condition that is less than the first temperature threshold and greater than or equal to the second temperature threshold, determining that the target control mode of the anti-condensation heater is the medium temperature control mode;

[0046] If the values of the N currently continuously collected ambient temperatures all meet the requirement of being less than the second temperature threshold, determining that the target control mode of the anti-condensation heater is the low-temperature control mode;

[0047] Wherein, N≥1, and the first temperature threshold is greater than the second temperature threshold.

[0048] As an improvement to the above solution, determining the on-time rate of the anti-condensation heater in each on-off cycle as the target on-time rate according to the ambient temperature and the ambient relative humidity specifically includes:

[0049] Calculate the average value of the M ambient temperatures collected continuously as the average ambient temperature;

[0050] Calculate the average value of the M continuously collected ambient relative humidity values as the average ambient relative humidity;

[0051] According to the preset correspondence between the ambient temperature, ambient relative humidity and the power-on rate, obtaining the power-on rate corresponding to the average ambient temperature and the average ambient relative humidity as the target power-on rate;

[0052] Among them, M≥1; in the corresponding relationship between the preset ambient temperature, ambient relative humidity and power-on rate, at the same ambient relative humidity, the power-on rate is negatively correlated with the ambient temperature, and at the same ambient temperature, the power-on rate is positively correlated with the ambient relative humidity.

[0053] Compared to the prior art, the present invention discloses a refrigerator and a method for compensating the temperature of a refrigerator compartment. The refrigerator includes a refrigerator compartment and a freezer compartment, the freezer compartment being located below the refrigerator compartment; a tilting beam disposed on the return air duct of the refrigerator compartment, the return air duct being located at the bottom of the refrigerator compartment, and an anti-condensation heater disposed on the tilting beam for heating the surface of the tilting beam to prevent condensation; and an environmental sensor disposed on the refrigerator body for collecting ambient temperature and relative humidity. The ambient temperature and relative humidity currently collected by the environmental sensor are obtained, and the operating state of the anti-condensation heater is controlled based on the ambient temperature and relative humidity to provide compensatory heating for the refrigerator compartment. By adopting the technical means of the present invention, by collecting parameters such as ambient temperature and ambient relative humidity, the working state of the anti-condensation heater of the refrigerator compartment flip beam is intelligently controlled, which not only ensures that there is no condensation on the surface of the refrigerator compartment flip beam, but also realizes temperature compensation of the refrigerator compartment under low temperature conditions, effectively solving the problem of negative temperature freezing of fruits, vegetables and other ingredients in the bottom drawer of the refrigerator compartment under low temperature conditions. In addition, the refrigerator system of the embodiment of the present invention does not need to specially thicken the thickness of the insulation layer between the refrigerator compartment and the freezer compartment, nor does it need to add additional compensating heating wires in the refrigeration foam layer, thereby realizing the economy and safety reliability of the entire refrigerator and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic structural diagram of a refrigerator provided by an embodiment of the present invention;

[0055] Figure 2 Schematic diagram of air circulation of the refrigeration air duct of the refrigeration chamber in an embodiment of the present invention;

[0056] Figure 3 1. It is a structural diagram of the installation position of the turning beam of the refrigerator in an embodiment of the present invention;

[0057] Figure 4 1 is a schematic diagram of a flow chart of the work performed by the controller of the refrigerator in an embodiment of the present invention under a first implementation scheme;

[0058] Figure 5 1 is a schematic diagram of a preferred structure of an anti-condensation heater in an embodiment of the present invention;

[0059] Figure 6 1 is a schematic diagram of a flow chart of the work performed by the controller of the refrigerator in an embodiment of the present invention under a second implementation scheme;

[0060] Figure 7 is a schematic diagram of a flow chart of the work performed by the controller of the refrigerator in the third embodiment of the present invention;

[0061] Figure 8 1 is a flow chart of a high temperature control mode of a refrigerator according to an embodiment of the present invention;

[0062] Figure 9 1 is a flow chart of a medium temperature control mode of a refrigerator in an embodiment of the present invention;

[0063] Figure 10 1 is a flow chart of a low-temperature control mode of a refrigerator in an embodiment of the present invention. DETAILED DESCRIPTION

[0064] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0065] See also Figure 1 , is a structural schematic diagram of a refrigerator provided by an embodiment of the present invention. The embodiment of the present invention provides a refrigerator 10, including a box body 11, and a storage chamber is provided in the box body 11, including a refrigerating chamber 12 and a freezing chamber 13, for storing items that need to be kept fresh or frozen. The freezing chamber 13 is provided below the refrigerating chamber 12.

[0066] The refrigerator also includes a refrigeration system for performing the refrigerator's refrigeration operation. It should be noted that the refrigerator performs the refrigeration operation through the refrigeration system, providing cold energy to be transferred to the storage compartment to maintain the storage compartment at a constant low temperature. Specifically, the refrigeration system of the refrigerator described in the embodiment of the present invention is composed of a compressor, a condenser, a drying filter, a capillary tube, and an evaporator. The working structure of the refrigeration system includes a compression process, a condensation process, a throttling process, and an evaporation process.

[0067] The compression process is as follows: When the refrigerator is plugged in and the unit is cooled, the compressor begins operating. Low-temperature, low-pressure refrigerant is drawn into the compressor, compressed into high-temperature, high-pressure superheated gas within the compressor cylinder, and then discharged into the condenser. The condensation process involves the high-temperature, high-pressure refrigerant gas dissipating heat through the condenser, gradually cooling to a saturated vapor at room temperature and high pressure. It then cools further to a saturated liquid, where the temperature stops falling. This temperature is called the condensation temperature. The refrigerant's pressure remains virtually constant throughout the condensation process. The throttling process involves the condensed saturated refrigerant liquid passing through a filter drier to remove moisture and impurities, then flowing into a capillary tube where it undergoes throttling and pressure reduction, turning it into a wet vapor at room temperature and low pressure. The evaporation process involves the refrigerant absorbing heat and vaporizing within the evaporator, reducing the temperature of the evaporator and its surroundings while also converting the refrigerant into a low-temperature, low-pressure gas. The refrigerant exiting the evaporator returns to the compressor, repeating the process, transferring heat from the refrigerator to the air outside, achieving the desired cooling effect.

[0068] See also Figure 2 , is a schematic diagram of the air circulation of the refrigeration air duct of the refrigerator compartment in an embodiment of the present invention. In this embodiment of the present invention, the refrigerator is a single refrigeration system, and the evaporator of the refrigeration system is placed in the freezer compartment at the bottom of the refrigerator. The refrigeration fan sends cold air from the freezer compartment to the refrigerator compartment through the refrigeration air duct to achieve normal refrigeration of the refrigerator compartment.

[0069] Further, see Figure 3 , is a structural diagram of the installation position of the flip beam of the refrigerator in an embodiment of the present invention. The refrigerator also includes a flip beam 14. The flip beam 14 is located on the door of the refrigerating chamber 12 near the return air duct. The return air duct is located at the bottom of the refrigerating chamber and the bottom of the back. The flip beam 14 is provided with an anti-condensation heater 15. Optionally, the anti-condensation heater 15 is provided on the back of the metal plate of the flip beam 14. In the embodiment of the present invention, on the one hand, the anti-condensation heater 15 is used to heat the surface temperature of the flip beam 14 to prevent condensation from forming on the surface of the flip beam. On the other hand, as shown in FIG. Figure 2 As shown, the anti-condensation heater 15 transfers heat to the return air duct of the refrigerating chamber during the heating process, thereby increasing the return air temperature of the refrigerating chamber and thus increasing the temperature of the bottom of the refrigerating chamber.

[0070] The refrigerator 10 further includes an environmental sensor 16, which is provided on the housing 11. Optionally, the environmental sensor 16 is provided in a hinge box at the top of the refrigerator. The environmental sensor 16 is composed of a temperature sensor and a humidity sensor, and is used to collect the ambient temperature T and the ambient relative humidity U.

[0071] The refrigerator 10 further includes a controller 17 , which is connected to the environmental sensor 16 and the anti-condensation heater 15 , respectively. The controller 17 is mainly used to collect and calculate relevant data and generate and issue relevant control instructions.

[0072] Specifically, see Figure 4 , is a flow chart of the work performed by the controller of the refrigerator in the embodiment of the present invention under the first implementation scheme, where the controller 17 is specifically configured to perform steps S11 to S12:

[0073] S11, obtaining the ambient temperature and relative humidity currently collected by the environmental sensor;

[0074] S12. Controlling the working state of the anti-condensation heater according to the ambient temperature and the ambient relative humidity to perform compensatory heating on the refrigeration compartment.

[0075] In an embodiment of the present invention, the anti-condensation heater on the flip beam in the existing refrigerator is reused to achieve compensatory heating of the cold storage compartment. By obtaining the current ambient temperature T and relative humidity U of the refrigerator in real time, the current environmental state of the refrigerator is judged. By controlling and adjusting the working state of the anti-condensation heater, compensatory heating is performed on the cold storage compartment in a low-temperature environment while preventing condensation on the surface of the flip beam.

[0076] The technical approach of the embodiments of the present invention intelligently controls the operating state of the anti-condensation heater on the refrigerator compartment's tilt beam by collecting parameters such as ambient temperature and relative humidity. This not only prevents condensation on the surface of the tilt beam but also compensates for the refrigerator compartment's temperature under low-temperature conditions, effectively resolving the issue of freezing temperatures in the bottom drawer of the refrigerator compartment, which can damage fruits and vegetables. Furthermore, the refrigerator system of the embodiments of the present invention eliminates the need for increased insulation thickness between the refrigerator and freezer compartments, nor does it require additional compensating heating wires within the refrigerated foam layer. This ensures the overall economy, safety, and reliability of the refrigerator, enhancing the user experience.

[0077] As a preferred embodiment, the embodiment of the present invention is further implemented on the basis of the above embodiment, and the structure of the anti-condensation heater 15 is optimized.

[0078] In the first embodiment, see Figure 5, is a schematic diagram of the preferred structure of the anti-condensation heater in an embodiment of the present invention, the anti-condensation heater 15 is a heating wire, the heating wire is pasted on the flip beam in a spiral shape, and the spiral density of the heating wire gradually increases from top to bottom along the flip beam.

[0079] In a second embodiment, the anti-condensation heater is a plurality of heating units, and the plurality of heating units are arranged at intervals on the flip beam, and the distance between two adjacent heating units gradually decreases from top to bottom along the flip beam.

[0080] That is, the heating part of the anti-condensation heater is arranged on the flip beam 14 in a "dense at the bottom and sparse at the top" manner, which can effectively improve the temperature compensation effect of the anti-condensation heater of the flip beam on the bottom of the cold storage room in a low temperature environment.

[0081] As a preferred embodiment, see Figure 6 , is a flow chart of the work performed by the controller of the refrigerator in an embodiment of the present invention under a second implementation scheme. This embodiment of the present invention is further implemented on the basis of any of the above embodiments. Step S12 performed by the controller 17, i.e., controlling the working state of the anti-condensation heater according to the ambient temperature and the ambient relative humidity to provide compensatory heating to the bottom of the refrigerating chamber, specifically includes steps S121 to S124:

[0082] S121. Determine a target control mode for the anti-condensation heater according to the ambient temperature;

[0083] S122. According to a preset correspondence between the control mode and the input voltage, obtain the input voltage corresponding to the target control mode as a target input voltage value, and power the anti-condensation heater according to the target input voltage value;

[0084] S123, determining an on-rate of the anti-condensation heater in each on-off cycle according to the ambient temperature and the ambient relative humidity, as a target on-rate;

[0085] S124: Control the anti-condensation heater to operate according to the target start-up rate in each start-stop cycle.

[0086] In an embodiment of the present invention, a correspondence between the ambient temperature and the control mode, as well as a correspondence between the control mode and the input voltage, is pre-set. The ambient temperature T and the ambient humidity U of the current refrigerator are acquired in real time by the environmental sensor 16. Based on the preset correspondence between the ambient temperature and the control mode, the ambient temperature range in which the current ambient temperature T falls is determined, thereby determining the control mode for the anti-condensation heater 15 as the target control mode. Furthermore, based on the preset correspondence between the control mode and the input voltage, the input voltage corresponding to the target control mode is acquired as the target input voltage value V. The anti-condensation heater 15 is powered according to the target input voltage value, thereby controlling the heating power of the anti-condensation heater 15.

[0087] Normally, the input voltage is negatively correlated with the ambient temperature, that is, if the current ambient temperature is lower, the target input voltage value is higher, that is, the heating power of the anti-condensation heater 15 is higher; if the current ambient temperature is higher, the target input voltage value is lower, that is, the heating power of the anti-condensation heater 15 is lower.

[0088] It should be noted that there is a preset voltage range for the input voltage value of the anti-condensation heater, and the target input voltage value cannot exceed the limit of the voltage range.

[0089] At the same time, a pre-set correspondence between ambient temperature, relative humidity, and on-rate is established. Once the current ambient temperature T and humidity U of the refrigerator are obtained, the on-rate corresponding to the current ambient temperature T and humidity U is found based on the correspondence between these three relationships, and this is used as the target on-rate. The on-rate refers to the ratio of the anti-condensation heater's on-time in a single on-off cycle to the total duration of the on-off cycle, where the total duration is the sum of the on-time and off-time periods.

[0090] After calculating the target start-up rate, the start-up time and shutdown time of the anti-condensation heater in each start-up and stop cycle are calculated according to the pre-set start-up and stop cycle durations, and the operation of the anti-condensation heater is controlled accordingly to prevent condensation on the flip beam and provide compensatory heating for the cold storage room.

[0091] As a preferred embodiment, the control mode is divided into a high temperature control mode, a medium temperature control mode or a low temperature control mode, which respectively intelligently controls the heating power and the working start and stop time of the anti-condensation heater of the refrigerated tilting beam:

[0092] Under high-temperature conditions, the refrigerator compartment's bottom temperature remains stable, and the refrigerator's tilt beam heater primarily prevents condensation on the beam's surface. At this time, the refrigerator controller supplies a relatively low voltage to the anti-condensation heater, which also operates at a low power level. Based on ambient temperature and relative humidity data collected by the refrigerator's environmental sensors, the controller intelligently controls the heater's on / off cycle, ensuring condensation-free operation across the refrigerator's tilt beam under various temperature and humidity conditions.

[0093] Under medium-temperature conditions, the risk of low temperatures at the bottom of the refrigerator compartment increases. The anti-condensation heater on the refrigerator's refrigerator compartment tilt beam not only prevents condensation on the tilt beam surface, but also requires the anti-condensation heater to operate at a higher frequency to provide temperature compensation and heat the refrigerator compartment return air, thereby increasing the return air temperature. The heating of the refrigerated return air improves the bottom of the refrigerator compartment and prevents low temperatures at the bottom of the refrigerator compartment. At this time, the refrigerator controller provides a medium voltage to the anti-condensation heater. The heating power of the anti-condensation heater is also higher than that in high-temperature environments. Based on the ambient temperature and relative humidity data collected by the refrigerator's environmental sensor, the on-off ratio of the anti-condensation heater is intelligently controlled. With a higher heating power and on-off ratio for the heating wire than in high-temperature environments, this achieves both condensation prevention on the refrigerator compartment tilt beam surface and temperature compensation at the bottom of the refrigerator compartment under medium-temperature conditions.

[0094] Under low-temperature operating conditions, the risk of low temperatures at the bottom of the refrigerator compartment is greatest. The anti-condensation heater on the refrigerator's refrigerator compartment tilt beam not only prevents condensation on the tilt beam surface under low-temperature and high-humidity conditions, but also primarily heats the refrigerator compartment return air for temperature compensation, raising the return air temperature. The heating of the return air improves the temperature at the bottom of the refrigerator compartment, preventing low temperatures at the bottom of the refrigerator compartment. At this time, the refrigerator controller supplies a higher voltage to the anti-condensation heater, and the heating power is also higher when the anti-condensation heater is operating. Based on the ambient temperature and relative humidity data collected by the refrigerator's environmental sensor, the on / off ratio of the anti-condensation heater is intelligently controlled, achieving higher heating power and on / off ratios in relatively high and medium temperature environments, while simultaneously achieving both condensation prevention on the refrigerator compartment tilt beam surface and temperature compensation at the bottom of the refrigerator compartment under low-temperature conditions.

[0095] See also Figure 7 , which is a flowchart of the operation executed by the refrigerator controller in the third embodiment of the present invention, then step S121, i.e., determining the target control mode for the anti-condensation heater according to the ambient temperature, specifically includes:

[0096] If the values of the N currently continuously collected ambient temperatures all meet or exceed a first temperature threshold, determining that the target control mode of the anti-condensation heater is a high-temperature control mode;

[0097] If the values of the N currently continuously collected ambient temperatures all satisfy a condition that is less than the first temperature threshold and greater than or equal to the second temperature threshold, determining that the target control mode of the anti-condensation heater is the medium temperature control mode;

[0098] If the values of the N currently continuously collected ambient temperatures all meet the requirement of being less than the second temperature threshold, determining that the target control mode of the anti-condensation heater is the low-temperature control mode;

[0099] Wherein, N≥1, and the first temperature threshold is greater than the second temperature threshold.

[0100] In an embodiment of the present invention, a first temperature threshold and a second temperature threshold are set to achieve the judgment of a high temperature environment, a medium temperature environment, and a low temperature environment. For example, the first temperature threshold is 30°C and the second temperature threshold is 12°C. Of course, the values of the first temperature threshold and the second temperature threshold can be adjusted and set according to actual application conditions without affecting the beneficial effects achieved by the present invention.

[0101] The environmental sensor detects the values of the ambient temperature T and the ambient relative humidity U once every preset time period. In order to prevent measurement errors of the environmental sensor, the control mode is judged by continuously detecting the ambient temperature values N times. For example, N is set to 5. Of course, the number N can be adjusted and set according to actual conditions without affecting the beneficial effects achieved by the present invention.

[0102] For example, from the time the refrigerator is powered on to the start of defrosting, the environmental sensor detects the ambient temperature once every minute and continuously detects the ambient temperature five times. T1, T2, T3, T4, and T5 are the five consecutive ambient temperatures memorized by the refrigerator controller. The control mode of the anti-condensation heater for the refrigerator compartment tilt beam is divided into the following three types according to the following judgment rules:

[0103] 1) High temperature control mode: If T1, T2, T3, T4, and T5 are all ≥ 30°C, the refrigerator is determined to enter the high temperature control mode for the anti-condensation heater of the tilt beam;

[0104] 2) Medium temperature control mode: If 12°C ≤ T1, T2, T3, T4, and T5 are all < 30°C, the refrigerator is determined to enter the medium temperature control mode for the anti-condensation heater of the tilt beam;

[0105] 3) Low temperature control mode: If T1, T2, T3, T4, and T5 are all less than 12°C, the refrigerator is determined to enter the low temperature control mode for the anti-condensation heater of the flip beam.

[0106] As an example, the corresponding relationship between the preset control mode and the input voltage is shown in Table 1:

[0107] Table 1

[0108] Control Mode Input voltage category Input voltage value (unit V) High temperature control mode Low voltage Vmin 10 Medium temperature control mode Medium voltage Vmid 12 Low temperature control mode High voltage Vmax 15

[0109] After the target control mode is determined, the corresponding input voltage value is searched according to Table 1 as the target input voltage value, and the anti-condensation heater is powered according to the target input voltage value.

[0110] It should be noted that the numerical values involved in the above scenarios are only for example. In actual application, the input voltage values corresponding to different control modes can be adjusted according to actual conditions, and no specific limitation is made here.

[0111] Further preferably, in step S123, determining the on-time rate of the anti-condensation heater in each on-off cycle as the target on-time rate according to the ambient temperature and the ambient relative humidity specifically includes:

[0112] Calculate the average value of the M ambient temperatures collected continuously as the average ambient temperature T V ;

[0113] Calculate the average value of the M continuously collected ambient relative humidity values as the average ambient relative humidity U V ;

[0114] According to the corresponding relationship between the preset ambient temperature, ambient relative humidity and the power-on rate, the average ambient temperature T is obtained. V , average ambient relative humidity U V The corresponding startup rate is used as the target startup rate;

[0115] Among them, M≥1; in the corresponding relationship between the preset ambient temperature, ambient relative humidity and power-on rate, at the same ambient relative humidity, the power-on rate is negatively correlated with the ambient temperature, and at the same ambient temperature, the power-on rate is positively correlated with the ambient relative humidity.

[0116] In an embodiment of the present invention, to prevent measurement errors from the environmental sensors, the anti-condensation heater's on-time is determined by continuously detecting the ambient temperature and relative humidity M times. For example, M is set to 3. Of course, the number M can be adjusted and set based on actual conditions without affecting the beneficial effects of the present invention.

[0117] As an example, the corresponding relationship between the preset ambient temperature, ambient relative humidity and power-on rate is shown in Table 2:

[0118] Table 2

[0119]

[0120] It should be noted that the values involved in the above scenarios are only for example. In actual application, the startup rate corresponding to different ambient temperatures and relative humidity can be adjusted according to actual conditions, and no specific limitations are made here.

[0121] For example, see Figures 8 to 10 , Figure 8 1 is a flow chart of a high temperature control mode of a refrigerator according to an embodiment of the present invention; Figure 9 1 is a flow chart of a medium temperature control mode of a refrigerator in an embodiment of the present invention; Figure 10 This is a flow chart of the low-temperature control mode of the refrigerator in an embodiment of the present invention, and explains the control schemes of the anti-condensation heater in the high-temperature control mode, the medium-temperature control mode and the low-temperature control mode respectively with specific embodiments.

[0122] The control scheme for the anti-condensation heater in the high-temperature control mode is as follows: the refrigerator system determines that it has entered the "high-temperature control mode", the refrigerator controller provides a low voltage Vmin to the anti-condensation heater, and the controller collects and records the ambient temperature T and ambient relative humidity U collected by the refrigerator environment sensor. The detection is performed once per minute. To prevent sensor measurement errors, the sensor detects three times in succession. TN1, TN2, and TN3 are the three ambient temperatures continuously memorized by the controller; U1, U2, and U3 are the three ambient relative humidity continuously memorized by the controller. The average value of the three temperatures is T. V and the average humidity U V , press T V and U V The combination value looks up the start-up rate in Table 2, and controls the anti-condensation heater to start and stop. After the system works for 6 hours in the current mode, the control mode of the anti-condensation heater is re-determined.

[0123] The control scheme for the anti-condensation heater in the medium temperature control mode is as follows: the refrigerator system determines that it has entered the "medium temperature control mode", the refrigerator controller provides a medium voltage Vmid to the anti-condensation heater, and the controller collects and records the ambient temperature T and relative humidity U of the refrigerator environment sensor. The detection is performed once per minute. To prevent sensor measurement errors, the sensor detects three times continuously. TN1, TN2, and TN3 are the three temperatures continuously memorized by the controller; U1, U2, and U3 are the three relative humidity continuously memorized by the controller. The average value of the three temperatures is T. V and the average relative humidity U V , press T V and U V The combination value looks up the start-up rate in Table 2, and controls the anti-condensation heater to start and stop. After the system works for 6 hours in the current mode, the control mode of the anti-condensation heater is re-determined.

[0124] The control scheme for the anti-condensation heater in the low-temperature control mode is as follows: the refrigerator system determines that it has entered the "low-temperature control mode", the refrigerator controller provides a high voltage Vmax to the anti-condensation heater, and the controller collects and records the ambient temperature T and ambient relative humidity U of the refrigerator environment sensor. The detection is performed once per minute. To prevent sensor measurement errors, the sensor detects three times continuously. TN1, TN2, and TN3 are the three temperatures continuously memorized by the controller; U1, U2, and U3 are the three relative humidity continuously memorized by the controller. The average value of the three temperatures is T. V and the average relative humidity U V , press T V and U V The combination value looks up the start-up rate in Table 2, and controls the anti-condensation heater to start and stop. After the system works for 6 hours in the current mode, the control mode of the anti-condensation heater is re-determined.

[0125] By adopting the technical means of the embodiments of the present invention, by collecting parameters such as ambient temperature and relative humidity, the heating power and on-off ratio of the anti-condensation heater of the refrigerator compartment flip beam are intelligently controlled, which not only ensures that there is no condensation on the surface of the refrigerator compartment flip beam, but also realizes temperature compensation of the refrigerator compartment under low temperature conditions, effectively solving the problem of negative temperature in the bottom drawer of the refrigerator compartment under low temperature conditions, which may freeze fruits, vegetables and other ingredients, thereby realizing the economy, safety and reliability of the entire refrigerator and improving the user experience.

[0126] An embodiment of the present invention further provides a method for compensating the temperature of a refrigerator compartment. The method is applied to a refrigerator, and the refrigerator includes:

[0127] A refrigerating chamber and a freezing chamber, wherein the freezing chamber is arranged below the refrigerating chamber;

[0128] A flip beam is provided on the return air duct of the refrigerating chamber, the return air duct is provided at the bottom of the refrigerating chamber, and an anti-condensation heater is provided on the flip beam to heat the surface temperature of the flip beam to prevent condensation from forming on the surface of the flip beam;

[0129] The refrigerating chamber temperature compensation method specifically includes steps S21 to S22:

[0130] S21, collecting the current ambient temperature and relative humidity;

[0131] S22. Control the working state of the anti-condensation heater according to the ambient temperature and the ambient relative humidity to perform compensatory heating on the refrigeration compartment.

[0132] As a preferred embodiment, the anti-condensation heater is a heating wire, which is attached to the flip beam in a spiral shape, and the spiral density of the heating wire gradually increases from top to bottom along the flip beam;

[0133] As another preferred embodiment, the anti-condensation heater is a plurality of heating units, and the plurality of heating units are arranged at intervals on the flip beam, and the distance between two adjacent heating units gradually decreases from top to bottom along the flip beam.

[0134] Preferably, controlling the working state of the anti-condensation heater according to the ambient temperature and the ambient relative humidity to perform compensatory heating on the bottom of the refrigeration chamber specifically includes:

[0135] determining a target control mode for the anti-condensation heater according to the ambient temperature;

[0136] According to a preset correspondence between the control mode and the input voltage, the input voltage corresponding to the target control mode is obtained as a target input voltage value, and the anti-condensation heater is powered according to the target input voltage value;

[0137] determining, according to the ambient temperature and the ambient relative humidity, an on-rate of the anti-condensation heater in each on-off cycle as a target on-rate;

[0138] The anti-condensation heater is controlled to operate according to the target start-up rate in each start-stop cycle.

[0139] Preferably, the control mode is a high temperature control mode, a medium temperature control mode or a low temperature control mode, and determining the target control mode of the anti-condensation heater according to the ambient temperature specifically includes:

[0140] If the values of the N currently continuously collected ambient temperatures all meet or exceed a first temperature threshold, determining that the target control mode of the anti-condensation heater is a high-temperature control mode;

[0141] If the values of the N currently continuously collected ambient temperatures all satisfy a condition that is less than the first temperature threshold and greater than or equal to the second temperature threshold, determining that the target control mode of the anti-condensation heater is the medium temperature control mode;

[0142] If the values of the N currently continuously collected ambient temperatures all meet the requirement of being less than the second temperature threshold, determining that the target control mode of the anti-condensation heater is the low-temperature control mode;

[0143] Wherein, N≥1, and the first temperature threshold is greater than the second temperature threshold.

[0144] Preferably, determining the on-time rate of the anti-condensation heater in each on-off cycle as the target on-time rate according to the ambient temperature and the ambient relative humidity specifically includes:

[0145] Calculate the average value of the M ambient temperatures collected continuously as the average ambient temperature;

[0146] Calculate the average value of the M continuously collected ambient relative humidity values as the average ambient relative humidity;

[0147] According to the preset correspondence between the ambient temperature, ambient relative humidity and the power-on rate, obtaining the power-on rate corresponding to the average ambient temperature and the average ambient relative humidity as the target power-on rate;

[0148] Among them, M≥1; in the corresponding relationship between the preset ambient temperature, ambient relative humidity and power-on rate, at the same ambient relative humidity, the power-on rate is negatively correlated with the ambient temperature, and at the same ambient temperature, the power-on rate is positively correlated with the ambient relative humidity.

[0149] By adopting the technical means of the embodiments of the present invention, by collecting parameters such as ambient temperature and ambient relative humidity, the heating power and on-off ratio of the anti-condensation heater of the refrigerator compartment flip beam are intelligently controlled, which not only ensures that condensation does not occur when the refrigerator compartment is flipped, but also realizes refrigerator compartment temperature compensation under low temperature conditions, effectively solving the problem of negative temperature in the bottom drawer of the refrigerator compartment under low temperature conditions, which may freeze fruits, vegetables and other ingredients, thereby realizing the economy, safety and reliability of the entire refrigerator and improving the user experience.

[0150] It should be noted that the refrigerator compartment temperature compensation method provided in the embodiment of the present invention is identical to all process steps executed by the controller of a refrigerator in the above embodiment, and the working principles and beneficial effects of the two correspond one to one, so they will not be repeated here.

[0151] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing related hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0152] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that: include: A box body, wherein a refrigerating chamber and a freezing chamber are provided inside, and the freezing chamber is arranged below the refrigerating chamber; A flip beam is provided on the return air duct of the refrigerating chamber, the return air duct is provided at the bottom of the refrigerating chamber, and an anti-condensation heater is provided on the flip beam to heat the surface temperature of the flip beam to prevent condensation from forming on the surface of the flip beam; An environmental sensor is provided on the box body and is used to collect ambient temperature and relative humidity; A controller is connected to the environmental sensor and the anti-condensation heater, and is used to: Obtaining the ambient temperature and relative humidity currently collected by the environmental sensor; controlling the operating state of the anti-condensation heater according to the ambient temperature and the ambient relative humidity to provide compensatory heating for the refrigeration compartment; The controlling the working state of the anti-condensation heater according to the ambient temperature and the ambient relative humidity to compensate for heating the bottom of the refrigeration chamber specifically includes: determining a target control mode for the anti-condensation heater according to the ambient temperature; According to a preset correspondence between the control mode and the input voltage, the input voltage corresponding to the target control mode is obtained as a target input voltage value, and the anti-condensation heater is powered according to the target input voltage value; determining, according to the ambient temperature and the ambient relative humidity, an on-rate of the anti-condensation heater in each on-off cycle as a target on-rate; The anti-condensation heater is controlled to operate according to the target start-up rate in each start-stop cycle.

2. The refrigerator according to claim 1, wherein The anti-condensation heater is a heating wire, which is attached to the flip beam in a spiral shape, and the spiral density of the heating wire gradually increases from top to bottom along the flip beam; Alternatively, the anti-condensation heater is a plurality of heating units, and the plurality of heating units are arranged at intervals on the flip beam, and the distance between two adjacent heating units gradually decreases from top to bottom along the flip beam.

3. The refrigerator according to claim 1, wherein If the control mode is a high temperature control mode, a medium temperature control mode, or a low temperature control mode, then determining a target control mode for the anti-condensation heater according to the ambient temperature specifically includes: If the values of the N currently continuously collected ambient temperatures all meet or exceed a first temperature threshold, determining that the target control mode of the anti-condensation heater is a high-temperature control mode; If the values of the N currently continuously collected ambient temperatures all satisfy a condition that is less than the first temperature threshold and greater than or equal to the second temperature threshold, determining that the target control mode of the anti-condensation heater is the medium temperature control mode; If the values of the N currently continuously collected ambient temperatures all meet the requirement of being less than the second temperature threshold, determining that the target control mode of the anti-condensation heater is the low-temperature control mode; Wherein, N≥1, and the first temperature threshold is greater than the second temperature threshold.

4. The refrigerator according to claim 1, wherein The determining, based on the ambient temperature and the ambient relative humidity, an on-time rate of the anti-condensation heater in each on-off cycle as a target on-time rate specifically includes: Calculate the average value of the M ambient temperatures collected continuously as the average ambient temperature; Calculate the average value of the M continuously collected ambient relative humidity values as the average ambient relative humidity; According to the preset correspondence between the ambient temperature, ambient relative humidity and the power-on rate, obtaining the power-on rate corresponding to the average ambient temperature and the average ambient relative humidity as the target power-on rate; Among them, M≥1; in the corresponding relationship between the preset ambient temperature, ambient relative humidity and power-on rate, at the same ambient relative humidity, the power-on rate is negatively correlated with the ambient temperature, and at the same ambient temperature, the power-on rate is positively correlated with the ambient relative humidity.

5. A method for compensating the temperature of a refrigerator compartment, characterized in that: The refrigerator comprises: A refrigerating chamber and a freezing chamber, wherein the freezing chamber is arranged below the refrigerating chamber; A flip beam is provided on the return air duct of the refrigerating chamber, the return air duct is provided at the bottom of the refrigerating chamber, and an anti-condensation heater is provided on the flip beam to heat the surface temperature of the flip beam to prevent condensation from forming on the surface of the flip beam; The method comprises: Collect the current ambient temperature and relative humidity; controlling the operating state of the anti-condensation heater according to the ambient temperature and the ambient relative humidity to provide compensatory heating for the refrigeration compartment; The controlling the working state of the anti-condensation heater according to the ambient temperature and the ambient relative humidity to compensate for heating the bottom of the refrigeration chamber specifically includes: determining a target control mode for the anti-condensation heater according to the ambient temperature; According to a preset correspondence between the control mode and the input voltage, the input voltage corresponding to the target control mode is obtained as a target input voltage value, and the anti-condensation heater is powered according to the target input voltage value; determining, according to the ambient temperature and the ambient relative humidity, an on-rate of the anti-condensation heater in each on-off cycle as a target on-rate; The anti-condensation heater is controlled to operate according to the target start-up rate in each start-stop cycle.

6. The method for compensating the temperature of the refrigerator compartment of a refrigerator according to claim 5, wherein: The anti-condensation heater is a heating wire, which is attached to the flip beam in a spiral shape, and the spiral density of the heating wire gradually increases from top to bottom along the flip beam; Alternatively, the anti-condensation heater is a plurality of heating units, and the plurality of heating units are arranged at intervals on the flip beam, and the distance between two adjacent heating units gradually decreases from top to bottom along the flip beam.

7. The method for compensating the temperature of the refrigerator compartment of a refrigerator according to claim 5, wherein: If the control mode is a high temperature control mode, a medium temperature control mode, or a low temperature control mode, then determining a target control mode for the anti-condensation heater according to the ambient temperature specifically includes: If the values of the N currently continuously collected ambient temperatures all meet or exceed a first temperature threshold, determining that the target control mode of the anti-condensation heater is a high-temperature control mode; If the values of the N currently continuously collected ambient temperatures all satisfy a condition that is less than the first temperature threshold and greater than or equal to the second temperature threshold, determining that the target control mode of the anti-condensation heater is the medium temperature control mode; If the values of the N currently continuously collected ambient temperatures all meet the requirement of being less than the second temperature threshold, determining that the target control mode of the anti-condensation heater is the low-temperature control mode; Wherein, N≥1, and the first temperature threshold is greater than the second temperature threshold.

8. The method for compensating the temperature of the refrigerator compartment of a refrigerator according to claim 5, wherein: The determining, based on the ambient temperature and the ambient relative humidity, an on-time rate of the anti-condensation heater in each on-off cycle as a target on-time rate specifically includes: Calculate the average value of the M ambient temperatures collected continuously as the average ambient temperature; Calculate the average value of the M continuously collected ambient relative humidity values as the average ambient relative humidity; According to the preset correspondence between the ambient temperature, ambient relative humidity and the power-on rate, obtaining the power-on rate corresponding to the average ambient temperature and the average ambient relative humidity as the target power-on rate; Among them, M≥1; in the corresponding relationship between the preset ambient temperature, ambient relative humidity and power-on rate, at the same ambient relative humidity, the power-on rate is negatively correlated with the ambient temperature, and at the same ambient temperature, the power-on rate is positively correlated with the ambient relative humidity.

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