Refrigerator and compartment function conversion method thereof

Abstract

The invention discloses a refrigerator and a compartment function conversion method thereof, the refrigerator comprises a refrigerator body, at least one storage chamber is formed in the refrigerator body, and the storage chamber comprises a freezing chamber; the refrigeration air duct is communicated with the freezing chamber through an air outlet communicated with the freezing chamber, and is provided with a fan for transmitting the cooling capacity of an evaporator arranged in the refrigeration air duct to the freezing chamber; the first temperature sensor is used for detecting the evaporation temperature of the evaporator; and a controller. Detecting the evaporation temperature of the evaporator by setting the target temperature of the freezing chamber as the preset function temperature; and when the difference value between the target temperature and the evaporation temperature is not smaller than a preset first temperature, the compressor is controlled to stop, the draught fan is kept to operate according to preset parameters, and when the difference value between the target temperature and the evaporation temperature is smaller than a preset second temperature, the draught fan is controlled to stop. The first temperature is greater than the second temperature. The freezing chamber can be converted into a refrigeration function.

Description

Technical Field

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

[0002] Refrigerators have become a common appliance in daily life, providing numerous conveniences. However, two-door and other multi-door refrigerators on the market typically include both a freezer and a refrigerator compartment. For users who rarely use the freezer, the refrigerator's capacity utilization is low, while the refrigerator compartment's space is insufficient. Consequently, existing refrigerators struggle to meet the demands of some users for both refrigeration and freezing capacity allocation. Summary of the Invention

[0003] The purpose of the embodiment of the present invention is to provide a refrigerator and a method for converting the function of a compartment thereof, which can convert the freezer compartment into a refrigeration compartment.

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

[0005] a box body, in which at least one storage compartment is formed, the storage compartment including a freezer compartment;

[0006] The refrigeration system consists of a refrigeration cycle pipeline consisting of a compressor, a condenser, a capillary tube and an evaporator connected in sequence;

[0007] a refrigeration air duct, which is in communication with the freezing chamber via an air outlet connected to the freezing chamber, and is equipped with a fan for transmitting the cooling energy of the evaporator arranged therein to the freezing chamber;

[0008] a first temperature sensor, configured to detect an evaporation temperature of the evaporator;

[0009] A controller configured to:

[0010] Setting the target temperature of the freezing chamber to a preset functional temperature and detecting the evaporation temperature of the evaporator;

[0011] When the difference between the target temperature and the evaporating temperature is not less than a preset first temperature, the compressor is controlled to stop, and the fan is kept running at preset parameters until the difference between the target temperature and the evaporating temperature is less than a preset second temperature, at which time the fan is controlled to stop;

[0012] The first temperature is greater than the second temperature.

[0013] Preferably, the controller is further configured to:

[0014] When the difference between the target temperature and the evaporating temperature is less than the first temperature, the current operating frequency of the compressor is maintained, the speed of the compressor is reduced by a preset first amplitude, and the speed of the fan is reduced by a preset second amplitude, and the operation is performed for a preset time.

[0015] Preferably, the controller is further configured to:

[0016] When the difference between the target temperature and the evaporation temperature is not less than the second temperature, the rotation speed of the fan is increased by a preset third amplitude and is run for a preset time period.

[0017] Preferably, the storage compartment further includes a refrigeration compartment;

[0018] The refrigeration air duct also includes a refrigeration damper for controlling the amount of cold delivered to the refrigeration chamber;

[0019] The controller is further configured to:

[0020] After receiving the compartment function conversion instruction, the compressor and the fan are controlled to start, and the refrigeration damper is controlled according to a preset control strategy.

[0021] Preferably, the refrigerator further comprises:

[0022] a second temperature sensor, configured to detect the refrigeration temperature of the refrigeration chamber;

[0023] The controller is further configured to:

[0024] When the detected refrigeration temperature is lower than a preset low temperature threshold, closing the refrigeration damper;

[0025] When the detected refrigeration temperature is higher than a preset high temperature threshold, opening the refrigeration damper;

[0026] The high temperature threshold is not lower than the low temperature threshold.

[0027] Preferably, the refrigerator further comprises:

[0028] When the difference between the target temperature and the evaporation temperature is not less than the second temperature, the low temperature threshold is reduced by a preset fourth amplitude.

[0029] Preferably, the refrigerator further comprises:

[0030] a third temperature sensor, configured to detect a freezing temperature of the freezing chamber;

[0031] The controller is further configured to:

[0032] After the fan is controlled to stop, the operations of the fan and the compressor are controlled according to the detected freezing temperature and the target temperature.

[0033] An embodiment of the present invention further provides a method for converting the functions of refrigerator compartments, the refrigerator comprising:

[0034] a box body, in which at least one storage compartment is formed, the storage compartment including a freezer compartment;

[0035] The refrigeration system consists of a refrigeration cycle pipeline consisting of a compressor, a condenser, a capillary tube and an evaporator connected in sequence;

[0036] a refrigeration air duct, which is in communication with the freezing chamber via an air outlet connected to the freezing chamber, and is equipped with a fan for transmitting the cooling energy of the evaporator arranged therein to the freezing chamber;

[0037] a first temperature sensor, configured to detect an evaporation temperature of the evaporator;

[0038] Controller;

[0039] The method comprises:

[0040] Setting the target temperature of the freezing chamber to a preset functional temperature and detecting the evaporation temperature of the evaporator;

[0041] When the difference between the target temperature and the evaporating temperature is not less than a preset first temperature, the compressor is controlled to stop, and the fan is kept running at preset parameters until the difference between the target temperature and the evaporating temperature is less than a preset second temperature, at which time the fan is controlled to stop;

[0042] The first temperature is greater than the second temperature.

[0043] Preferably, the method further comprises:

[0044] When the difference between the target temperature and the evaporating temperature is less than the first temperature, the current operating frequency of the compressor is maintained, the speed of the compressor is reduced by a preset first amplitude, and the speed of the fan is reduced by a preset second amplitude, and the operation is performed for a preset time.

[0045] Preferably, the method further comprises:

[0046] When the difference between the target temperature and the evaporation temperature is not less than the second temperature, the rotation speed of the fan is increased by a preset third amplitude and is run for a preset time period.

[0047] Preferably, the storage room further includes a refrigeration room;

[0048] The refrigeration air duct also includes a refrigeration damper for controlling the amount of cold delivered to the refrigeration chamber;

[0049] The method further comprises:

[0050] After receiving the compartment function conversion instruction, the compressor and the fan are controlled to start, and the refrigeration damper is controlled according to a preset control strategy.

[0051] Preferably, the refrigerator further comprises:

[0052] a second temperature sensor, configured to detect the refrigeration temperature of the refrigeration chamber;

[0053] The controlling of the refrigeration damper according to a preset control strategy includes:

[0054] When the detected refrigeration temperature is lower than a preset low temperature threshold, closing the refrigeration damper;

[0055] When the detected refrigeration temperature is higher than a preset high temperature threshold, opening the refrigeration damper;

[0056] The high temperature threshold is not lower than the low temperature threshold.

[0057] Preferably, the method further comprises:

[0058] When the difference between the target temperature and the evaporation temperature is not less than the second temperature, the low temperature threshold is reduced by a preset fourth amplitude.

[0059] Preferably, the refrigerator further comprises:

[0060] a third temperature sensor, configured to detect a freezing temperature of the freezing chamber;

[0061] The method further comprises:

[0062] After the fan is controlled to stop, the operations of the fan and the compressor are controlled according to the detected freezing temperature and the target temperature.

[0063] Compared to the prior art, the present invention discloses a refrigerator and a method for converting the function of a compartment thereof. The refrigerator includes a cabinet having at least one storage compartment formed therein, the storage compartment including a freezer compartment; a refrigeration system comprising a refrigeration cycle composed of a compressor, a condenser, a capillary tube, and an evaporator connected in sequence; a refrigeration duct connected to the freezer compartment via an air outlet connected to the freezer compartment, and equipped with a fan for transferring the cooling energy of the evaporator disposed therein to the freezer compartment; a first temperature sensor for detecting the evaporation temperature of the evaporator; and a controller. The evaporation temperature of the evaporator is detected by setting the target temperature of the freezer compartment to a preset functional temperature; when the difference between the target temperature and the evaporation temperature is not less than a preset first temperature, the compressor is controlled to stop, and the fan is kept running at preset parameters until the difference between the target temperature and the evaporation temperature is less than a preset second temperature, at which time the fan is controlled to stop; the first temperature is greater than the second temperature. The present application can convert the freezer compartment into a refrigeration function. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0065] Figure 2 This is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0066] Figure 3 1 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0067] Figure 4 is a partial structural diagram of a refrigerator provided by an embodiment of the present invention;

[0068] Figure 5 is a schematic diagram of the flow of work performed by the controller provided in an embodiment of the present invention;

[0069] Figure 6 is another flowchart of the work performed by the controller provided in an embodiment of the present invention;

[0070] Figure 7 is another flowchart of the work performed by the controller provided in an embodiment of the present invention;

[0071] Figure 8 It is a schematic structural diagram of the cooling air duct provided by an embodiment of the present invention;

[0072] Figure 9 is another flowchart of the work performed by the controller provided in an embodiment of the present invention;

[0073] Figure 10The figure is a flow chart of a refrigerator compartment function conversion method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0074] 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.

[0075] 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.

[0076] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0077] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0078] See also Figure 1 , Figure 1 The figure is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention. The refrigerator of this embodiment has a roughly rectangular shape and includes a cabinet defining a storage space and multiple doors disposed at the cabinet opening. The doors include a door shell located on the outside of the cabinet, a door liner located on the inside of the cabinet, an upper end cover, a lower end cover, and an insulation layer located between the door shell, the door liner, the upper end cover, and the lower end cover. Typically, the insulation layer is filled with foam. The cabinet is provided with a chamber, wherein the chamber includes a component storage cavity for placing refrigerator components, such as a compressor compartment, and also includes storage space for storing food, etc.

[0079] See also Figure 2 , Figure 2 This is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention. The storage space can be divided into multiple storage chambers. The storage chambers can be configured as refrigerators and freezers according to different uses. They can also include variable temperature chambers, vacuum drawers, moisturizing drawers, and the like. The storage temperature is controlled by controlling the air output of the refrigeration system to the refrigerator and freezer through the configured air outlets. Each storage chamber corresponds to one or more door bodies, and the storage chamber at the top of the refrigerator is provided with a double-door body. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to achieve drawer-like storage. A display screen is provided at the door of the refrigerator, and the display screen is used to display prompt information and receive user touch operations.

[0080] It should be noted that the solution provided in this application can be applied to various refrigerator products on the market, including: double-door refrigerators, upper and lower door refrigerators, and cross refrigerators. Refrigerators with freezer and refrigerator compartments can all apply the solution of this application.

[0081] See also Figure 3 , Figure 3 The structural diagram of the refrigeration system in the refrigerator provided by the embodiment of the present invention, the refrigeration system includes a compressor 1, an evaporator 2, a drying filter (not shown in the figure), a capillary tube 3, a condenser 4 and a gas-liquid separator (not shown in the figure). The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process. Among them, the compression process is: plug in the power cord of the refrigerator, when the contacts of the thermostat are connected, the compressor 1 starts to work, the low-temperature, low-pressure refrigerant is sucked into the compressor 1, and is compressed into a high-temperature, high-pressure superheated gas in the cylinder of the compressor 1 and then discharged into the condenser 4; the condensation process is: the high-temperature, high-pressure refrigerant gas dissipates heat through the condenser 4, the temperature continues to drop, and is gradually cooled to a saturated vapor of normal temperature and high pressure, and is further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows ... The process is as follows: the saturated refrigerant liquid after condensation is filtered out of moisture and impurities by a drying filter and then flows into the capillary tube 3, through which it is throttled and depressurized, and the refrigerant becomes wet steam at room temperature and low pressure; the evaporation process is as follows: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 2, which not only reduces the temperature of the evaporator 2 and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 2 passes through the gas-liquid separator and returns to the compressor 1 again, repeating the above process to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0082] The refrigerator provided in the embodiment of the present invention includes:

[0083] a box body, in which at least one storage compartment is formed, the storage compartment including a freezer compartment;

[0084] The refrigeration system consists of a refrigeration cycle pipeline consisting of a compressor, a condenser, a capillary tube and an evaporator connected in sequence;

[0085] a refrigeration air duct, which is in communication with the freezing chamber via an air outlet connected to the freezing chamber, and is equipped with a fan for transmitting the cooling energy of the evaporator arranged therein to the freezing chamber;

[0086] a first temperature sensor, configured to detect an evaporation temperature of the evaporator;

[0087] Controller;

[0088] See also Figure 4 , which is a partial structural diagram of a refrigerator provided by an embodiment of the present invention. The refrigerator includes a controller 140 for executing a control program to implement a function switch from a freezer compartment to a refrigerator compartment.

[0089] When performing control, the controller 140 is connected to the compressor 1 in the refrigeration system and to the fan 142 in the refrigeration air duct.

[0090] The refrigerator includes a refrigeration duct, and an evaporator is arranged in the refrigeration duct. The evaporator transfers cold energy to the refrigeration duct by exchanging heat with the control in the refrigeration duct. A fan 142 is provided in the refrigeration duct. The fan drives the air flow in the refrigeration duct by rotating, and delivers cold energy to the freezer to achieve refrigeration.

[0091] The controller is also connected to the fan 142 in the refrigeration air duct for controlling the start and stop of the fan 142 .

[0092] The evaporator 2 is provided with a first temperature sensor 143 for detecting the evaporation temperature of the evaporator. The controller reads the evaporation temperature of the evaporator through the first temperature sensor 143 and controls the process of switching the freezer compartment to the refrigeration function.

[0093] For some users who use the freezer compartment very infrequently, the volume utilization rate of the refrigerator is not high, and the space in the refrigerator compartment is difficult to meet the needs. That is, existing refrigerators are difficult to meet the requirements of some users for the allocation of refrigeration and freezing capacity.

[0094] When the controller provided by the present invention performs the freezing-to-refrigeration function, it is configured as follows:

[0095] Setting the target temperature of the freezing chamber to a preset functional temperature and detecting the evaporation temperature of the evaporator;

[0096] When the difference between the target temperature and the evaporating temperature is not less than a preset first temperature, the compressor is controlled to stop, and the fan is kept running at preset parameters until the difference between the target temperature and the evaporating temperature is less than a preset second temperature, at which time the fan is controlled to stop;

[0097] The first temperature is greater than the second temperature.

[0098] In the specific implementation of this embodiment, the freezer compartment's temperature control range is -25°C to -15°C at a normal ambient temperature of 25°C, and the refrigerator compartment's temperature control range is 0°C to 8°C. The freezer compartment and the variable temperature chamber have roughly the same volume. When the refrigerator is controlled as a freezer compartment, the temperature is -20°C, the cooling time is approximately 20 minutes, the fan is approximately 1500 rpm, the air output is large, the freezing air outlet is front-facing, and the operation is relatively flexible. However, when the refrigerator compartment is switched to a temperature of approximately 4°C, the fan and evaporator remain in their original configuration, and the cooling time is reduced to 5 minutes. Therefore, when the freezer is switched to the refrigerator function, the temperature fluctuates by more than 10°C, making it impossible to achieve uniform temperature control.

[0099] In order to solve this technical problem, the present application proposes a controller to control the freezing chamber to refrigeration function, see Figure 5 , is a flowchart of the work performed by the controller provided in an embodiment of the present invention. The controller specifically performs the following steps:

[0100] Step S501, setting the target temperature of the freezing chamber to A.

[0101] When the refrigerator is operating normally, the target temperature for the freezer compartment is generally set at -15°C, and the target temperature for the refrigerator compartment is generally set at 2-3°C. A is the functional temperature after the freezer compartment switches to the refrigerator function. A is generally set to 2-3°C. This means that the freezer compartment must reach the target temperature before switching to the refrigerator function.

[0102] It should be noted that the temperature of a conventional refrigerator is generally set at 0 to 8°C. In this application, when switching from a freezer to a refrigerator, the target temperature of the freezer-to-refrigeration function can be set lower, between -4 and 8°C.

[0103] It should be noted that the target temperature A in this embodiment is a preferred embodiment. In other embodiments, the target temperature can be set or adjusted according to actual conditions.

[0104] Step S502: detecting the evaporation temperature C.

[0105] At this time, when the refrigerator is in normal use, the temperature of the evaporator is generally low, at minus 30° C. The temperature of the evaporator is detected by a first temperature sensor provided on the evaporator.

[0106] Step S503: determine whether AC≥D1 holds.

[0107] Wherein, D1 is the set first temperature, that is, judging whether the target temperature of the freezer compartment and the temperature difference of the evaporator reach a certain range. As a preferred value, the first temperature D1 can be selected as 15°C.

[0108] If not, execute other control processes;

[0109] If so, execute step S504.

[0110] Step S504: Control the compressor to stop and keep the fan running.

[0111] That is, when the difference between the freezer's target temperature and the evaporator's temperature reaches a certain range, it indicates that the evaporator's cooling capacity is sufficient to switch to refrigeration mode, and the refrigeration system does not need to continue cooling. If the refrigeration system continues to cool, the cooling capacity will be too high, and the freezer will not be able to cool properly.

[0112] When the temperature of the evaporator is able to support the functional conversion of the freezer, the control of the freezer function on the compressor is stopped and the compressor is turned off, but the fan in the refrigeration duct is kept running to output the cooling capacity of the evaporator to the freezer, so as to avoid the freezer losing cooling capacity support, causing the temperature to rise sharply, and the problem of temperature out of control leading to large temperature fluctuations in the freezer. The cooling capacity of the evaporator is transported to the freezer through the fan, and the freezer loses a large amount of cooling capacity provided by the refrigeration system to the evaporator, and cannot maintain the low temperature of the freezer, causing the temperature of the freezer to rise steadily. The temperature of the evaporator gradually rises, and due to the cooling capacity loss of the air duct value, the difference between the cooling capacity loss target temperature of the freezer and the evaporation temperature gradually decreases.

[0113] Duct cooling loss also includes the normal loss required to maintain the refrigeration function of other refrigerated compartments in the refrigerator, such as the cooling loss required by the refrigerator to maintain its refrigeration capacity.

[0114] Step S505: continuously monitor the evaporation temperature C.

[0115] When the cooling energy of the evaporator is transported to the freezer compartment through the fan, the compressor stops working and the evaporator temperature will rise. At this time, the evaporator temperature needs to be detected.

[0116] Step S506, determining whether AC<D2 holds.

[0117] Among them, D2 is the set second temperature, the first temperature is greater than the second temperature, that is, it is judged that the temperature difference between the target temperature of the freezer and the evaporator is less than a certain range. As a preferred value, the second temperature D2 can be selected as 0°C.

[0118] If not, return to step S505;

[0119] If yes, go to step S507;

[0120] Step S507, turning off the fan.

[0121] It should be noted that in this embodiment, the first temperature is set to 15 degrees Celsius and the second temperature is set to 0 degrees Celsius. In other embodiments, the first temperature and the second temperature can be set or adjusted according to actual conditions, as long as the first temperature is greater than the second temperature.

[0122] After the compressor of the refrigeration system stops, the cold energy of the evaporator is transported to the freezer through the fan, and the evaporator temperature drops. That is, when the target temperature of the freezer is very close to the temperature of the evaporator, it indicates that the temperature of the evaporator is converted to the refrigeration function at this time. The temperature of the evaporator reaches the target temperature of the freezer. At this time, the temperature of the freezer that transmits cold energy through the air duct is also close to the target temperature of refrigeration, indicating that the freezer has basically completed the conversion of the refrigeration function.

[0123] During the conversion process, the freezer compartment temperature rises, and the refrigeration system and evaporator temperatures simultaneously reach the required refrigeration temperature. The refrigerator's refrigeration system maintains a balanced cooling state and does not lose control. After the conversion is complete, the refrigeration system can still control the cooling according to the target temperature, without causing large temperature fluctuations in the refrigerator compartment, and the functional conversion is completed stably.

[0124] In another embodiment of the present invention, the controller is further configured to:

[0125] When the difference between the target temperature and the evaporating temperature is less than the first temperature, the current operating frequency of the compressor is maintained, the speed of the compressor is reduced by a preset first amplitude, and the speed of the fan is reduced by a preset second amplitude, and the operation is performed for a preset time.

[0126] When implementing this embodiment, see Figure 6 , is another flowchart of the work performed by the controller provided in an embodiment of the present invention. The controller specifically performs the following steps:

[0127] Step S601, setting the target temperature of the freezing chamber to A.

[0128] When the refrigerator is operating normally, the target temperature for the freezer compartment is generally set at -15°C, and the target temperature for the refrigerator compartment is generally set at 2-3°C. A is the functional temperature after the freezer compartment switches to the refrigerator function. A is generally set to 2-3°C. This means that the freezer compartment must reach the target temperature before switching to the refrigerator function.

[0129] It should be noted that the temperature of a conventional refrigerator is generally set at 0 to 8°C. In this application, when switching from a freezer to a refrigerator, the target temperature of the freezer-to-refrigeration function can be set lower, between -4 and 8°C.

[0130] It should be noted that the target temperature A in this embodiment is a preferred embodiment. In other embodiments, the target temperature can be set or adjusted according to actual conditions.

[0131] Step S602: detecting the evaporation temperature C.

[0132] At this time, when the refrigerator is in normal use, the temperature of the evaporator is generally low, at minus 30° C. The temperature of the evaporator is detected by a first temperature sensor provided on the evaporator.

[0133] Step S603: determine whether AC≥D1 holds.

[0134] Wherein, D1 is the set first temperature, that is, judging whether the target temperature of the freezer compartment and the temperature difference of the evaporator reach a certain range. As a preferred value, the first temperature D1 can be selected as 15°C.

[0135] If not, execute step S604;

[0136] If so, execute step S605.

[0137] Step S604: maintain the current operating frequency of the compressor, reduce the speed of the compressor and the speed of the fan, run for a preset time, and return to step S602.

[0138] The compressor reduces its speed m1 to approximately 100-1000 rpm based on the existing frequency M, increasing the compressor's cooling time and reducing the amplitude of temperature fluctuations. The refrigeration fan reduces its speed t2 to 50-500 rpm based on the existing speed T.

[0139] At this point, when the difference between the freezer's target temperature and the evaporator's temperature is below a certain range, the evaporator's cooling capacity is insufficient to switch to refrigeration mode, and the refrigeration system needs to maintain continuous cooling. This prevents the evaporator from being insufficiently cooled and unable to maintain a stable temperature during the function switchover process due to the refrigerator's initial startup.

[0140] S605, control the compressor to stop and keep the fan running.

[0141] Duct cooling loss also includes the normal loss required to maintain the refrigeration function of other refrigerated compartments in the refrigerator, such as the cooling loss required by the refrigerator to maintain its refrigeration capacity.

[0142] Step S606: continuously monitor the evaporation temperature C.

[0143] When the cooling energy of the evaporator is transported to the freezer compartment through the fan, the compressor stops working and the evaporator temperature will rise. At this time, the evaporator temperature needs to be detected.

[0144] Step S607, determining whether AC<D2 holds.

[0145] Among them, D2 is the set second temperature, the first temperature is greater than the second temperature, that is, it is judged that the temperature difference between the target temperature of the freezer and the evaporator is less than a certain range. As a preferred value, the second temperature D2 can be selected as 0°C.

[0146] If not, return to step S606;

[0147] If yes, go to step S608;

[0148] Step S608, turning off the fan.

[0149] When the temperature difference between the target temperature and the evaporator temperature is low, the cooling capacity of the evaporator is insufficient to support the function conversion process. At this time, the compressor continues to run, and the refrigeration to freezing function switch is not performed temporarily. The refrigeration system continues to run, but the compressor speed is reduced, the fan speed is reduced, the compressor cooling time is increased, the temperature change amplitude is reduced, and the amplitude of the freezer compartment temperature drop caused by the cooling capacity of the refrigeration system is reduced, thereby reducing the difficulty of subsequent function conversion.

[0150] In another embodiment of the present invention, the controller is further configured to:

[0151] When the difference between the target temperature and the evaporation temperature is not less than the second temperature, the rotation speed of the fan is increased by a preset third amplitude and is run for a preset time period.

[0152] When implementing this embodiment, see Figure 7 , is another flowchart of the work performed by the controller provided in an embodiment of the present invention. The controller specifically performs the following steps:

[0153] Step S701, setting the target temperature of the freezing chamber to A.

[0154] When the refrigerator is operating normally, the target temperature for the freezer compartment is generally set at -15°C, and the target temperature for the refrigerator compartment is generally set at 2-3°C. A is the functional temperature after the freezer compartment switches to the refrigerator function. A is generally set to 2-3°C. This means that the freezer compartment must reach the target temperature before switching to the refrigerator function.

[0155] Step S702: detecting the evaporation temperature C.

[0156] At this time, when the refrigerator is in normal use, the temperature of the evaporator is generally low, at minus 30° C. The temperature of the evaporator is detected by a first temperature sensor provided on the evaporator.

[0157] Step S703: determine whether AC≥D1 holds.

[0158] Wherein, D1 is the set first temperature, that is, judging whether the target temperature of the freezer compartment and the temperature difference of the evaporator reach a certain range. As a preferred value, the first temperature D1 can be selected as 15°C.

[0159] If not, execute other control processes;

[0160] If so, execute step S704.

[0161] Step S704: Control the compressor to stop and keep the fan on.

[0162] Duct cooling loss also includes the normal loss required to maintain the refrigeration function of other refrigerated compartments in the refrigerator, such as the cooling loss required by the refrigerator to maintain its refrigeration capacity.

[0163] Step S705: continuously monitor the evaporation temperature C.

[0164] When the cooling energy of the evaporator is transported to the freezer compartment through the fan, the compressor stops working and the evaporator temperature will rise. At this time, the evaporator temperature needs to be detected.

[0165] Step S706, determining whether AC<D2 holds.

[0166] Among them, D2 is the set second temperature, the first temperature is greater than the second temperature, that is, it is judged that the temperature difference between the target temperature of the freezer and the evaporator is less than a certain range. As a preferred value, the second temperature D2 can be selected as 0°C.

[0167] If not, execute step S707;

[0168] If yes, go to step S708;

[0169] Step S707: Increase the speed of the fan and run for 5 minutes, then return to step S705.

[0170] According to the existing fan speed T, increase t2 (50-500rpm) to increase the fan speed.

[0171] When the temperature of the evaporator is not lowered to a temperature close to the target temperature, the evaporator is lowered slowly and the fan speed is increased. While accelerating the defrosting of the evaporator through freezing of the evaporator, the temperature inside the box can be stabilized.

[0172] Step S708, turning off the fan.

[0173] By monitoring the evaporator temperature drop rate, the efficiency of the function conversion process can be judged. When the freezer compartment warms up slowly, the fan speed is increased to increase the conversion rate and stabilize the temperature inside the box.

[0174] In another embodiment provided by the present invention, the storage chamber further includes a refrigeration chamber;

[0175] The refrigeration air duct also includes a refrigeration damper for controlling the amount of cold delivered to the refrigeration chamber;

[0176] The controller is further configured to:

[0177] After receiving the compartment function conversion instruction, the compressor and the fan are controlled to start, and the refrigeration damper is controlled according to a preset control strategy.

[0178] When implementing this embodiment, see Figure 8 , is a structural diagram of a refrigeration duct provided in an embodiment of the present invention, wherein the refrigeration duct 8 includes an evaporator 2 and a fan 142 .

[0179] The cooling air in the refrigeration duct is transported to the storage room through the fan for cooling. The storage room includes the freezer and refrigerator. Therefore, the cooling air duct needs to transport the cooling air to the freezer and refrigerator for cooling.

[0180] In order to realize the separate control of the freezing chamber and the refrigerating chamber, the present application sets a refrigerating damper 801 in the refrigerating air duct to control the amount of cold delivered to the refrigerating chamber. Air is supplied through the air outlet and returned through the return air outlet to realize the air cooling cycle.

[0181] The fan drives the cooling capacity. The freezer compartment needs to maintain a low temperature for a long time, so it requires a large amount of cooling capacity. Therefore, the cooling capacity of the freezer compartment can be controlled by controlling the compressor and fan. When using a single evaporator duct to cool both the refrigerator and freezer compartments, a separate cooling damper is required to control the cooling capacity of the refrigerator compartment.

[0182] When receiving the compartment function conversion instruction from the freezer to the refrigeration compartment, the target temperature of the freezer compartment is set to A and the new control strategy is executed.

[0183] The compressor and fan are turned on normally, and the normal control process of the refrigeration damper is maintained. Through the traditional control strategy, during the conversion process from the freezer to the refrigeration function, and after the conversion process, the normal control strategy is maintained to control the refrigeration damper to ensure the normal operation of the refrigerator's refrigeration function.

[0184] In another embodiment provided by the present invention, the refrigerator further includes:

[0185] a second temperature sensor, configured to detect the refrigeration temperature of the refrigeration chamber;

[0186] The controller is further configured to:

[0187] When the detected refrigeration temperature is lower than a preset low temperature threshold, closing the refrigeration damper;

[0188] When the detected refrigeration temperature is higher than a preset high temperature threshold, the refrigeration damper is opened.

[0189] When implementing this embodiment, see Figure 4 The refrigerator further includes a second temperature sensor 144, which is disposed in the refrigerating chamber and is used to detect the temperature of the refrigerating chamber.

[0190] The controller 140 is connected to the second temperature sensor 144 and is used to obtain and detect the refrigeration temperature of the refrigeration chamber and control the operation of the refrigeration damper 141 according to the detected refrigeration temperature.

[0191] See also Figure 9 , is another flowchart of the work performed by the controller provided in an embodiment of the present invention. When the controller controls the refrigeration damper according to the preset control strategy, the controller specifically performs the following steps:

[0192] Step S901, detecting the refrigeration temperature of the refrigeration chamber;

[0193] Step S902: determine whether the refrigeration temperature is lower than the low temperature threshold.

[0194] If yes, go to step S903;

[0195] If not, execute step S904;

[0196] Step S903, close the refrigeration damper and return to step S901.

[0197] That is, when the temperature of the refrigerated room is lower than the low temperature threshold, it indicates that the temperature of the refrigerated room is too low and the cold air is being delivered too much. In this case, the cold air delivery needs to be shut down, that is, the refrigerated air door is controlled to be closed.

[0198] Step S904: determine whether the refrigeration temperature is higher than the high temperature threshold.

[0199] If yes, go to step S905;

[0200] If not, return to step S901;

[0201] Step S905, close the refrigeration damper and return to step S901.

[0202] That is, when the temperature in the refrigerator compartment is higher than the low temperature threshold, it indicates that the temperature in the refrigerator compartment is too high and the cold delivery is insufficient. At this time, the cold delivery needs to be turned on, that is, the refrigerator damper is controlled to open.

[0203] It should be noted that the high temperature threshold and the low temperature threshold are thresholds set according to the operating temperature range of the refrigeration chamber, and are used to control the opening and closing of the refrigeration damper. The high temperature threshold is not lower than the low temperature threshold.

[0204] In another embodiment provided by the present invention, the refrigerator further includes:

[0205] When the difference between the target temperature and the evaporation temperature is not less than the second temperature, the low temperature threshold is reduced by a preset fourth amplitude.

[0206] During the specific implementation of this embodiment, it is determined in the above step S706 that AC<D2 is not established.

[0207] In step S707, in addition to increasing the fan speed for 5 minutes, the low temperature threshold of the refrigeration room needs to be lowered. Based on the low temperature threshold control of the original shutdown point, it is reduced by n°C, where n = 1 to 4, to stabilize the temperature in the box.

[0208] In another embodiment provided by the present invention, the refrigerator further includes:

[0209] a third temperature sensor, configured to detect a freezing temperature of the freezing chamber;

[0210] The controller is further configured to:

[0211] After the fan is controlled to stop, the operations of the fan and the compressor are controlled according to the detected freezing temperature and the target temperature.

[0212] When implementing this embodiment, see Figure 4 The refrigerator further includes a third temperature sensor 145, which is disposed in the freezer compartment and is used to detect the temperature of the freezer compartment.

[0213] The controller 140 is connected to the third temperature sensor 145 and is used to obtain and detect the freezing temperature of the freezing chamber and control the operation of the refrigeration system according to the detected freezing temperature.

[0214] After the freezer compartment is switched to the refrigeration function, the temperature of the freezer compartment takes over the control strategy of the refrigeration system, that is, the operation of the fan and the compressor is controlled according to the detected freezing temperature and the target temperature.

[0215] The specific control strategy can set the operating parameters of the fan and compressor according to different temperature ranges, so as to match different operating parameters.

[0216] By detecting the freezing temperature of the freezer compartment, the normal operation of the refrigeration system is controlled to ensure the normal operation of the freezer compartment after switching to the refrigeration function.

[0217] Another embodiment of the present invention provides a method for converting functions of refrigerator compartments, the refrigerator comprising:

[0218] a box body, in which at least one storage compartment is formed, the storage compartment including a freezer compartment;

[0219] The refrigeration system consists of a refrigeration cycle pipeline consisting of a compressor, a condenser, a capillary tube and an evaporator connected in sequence;

[0220] a refrigeration air duct, which is in communication with the freezing chamber via an air outlet connected to the freezing chamber, and is equipped with a fan for transmitting the cooling energy of the evaporator arranged therein to the freezing chamber;

[0221] a first temperature sensor, configured to detect an evaporation temperature of the evaporator;

[0222] Controller;

[0223] See also Figure 10 , is a flow chart of a refrigerator compartment function conversion method provided by an embodiment of the present invention, the method comprising the following steps:

[0224] Step S1, setting the target temperature of the freezing chamber to a preset functional temperature, and detecting the evaporation temperature of the evaporator;

[0225] Step S2: When the difference between the target temperature and the evaporating temperature is not less than a preset first temperature, the compressor is controlled to stop, and the fan is kept running at preset parameters until the difference between the target temperature and the evaporating temperature is less than a preset second temperature, at which time the fan is controlled to stop;

[0226] The first temperature is greater than the second temperature.

[0227] It should be noted that the method for converting the compartment functions of a refrigerator provided in an embodiment of the present invention has the same process steps as those 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.

[0228] 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).

[0229] 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, in which at least one storage compartment is formed, the storage compartment including a freezer compartment; The refrigeration system consists of a refrigeration cycle pipeline consisting of a compressor, a condenser, a capillary tube and an evaporator connected in sequence; a refrigeration air duct, which is in communication with the freezing chamber via an air outlet connected to the freezing chamber, and is equipped with a fan for transmitting the cooling energy of the evaporator arranged therein to the freezing chamber; a first temperature sensor, configured to detect an evaporation temperature of the evaporator; A controller configured to: Setting the target temperature of the freezing chamber to a preset functional temperature and detecting the evaporation temperature of the evaporator; When the difference between the target temperature and the evaporating temperature is not less than a preset first temperature, the compressor is controlled to stop, and the fan is kept running at preset parameters until the difference between the target temperature and the evaporating temperature is less than a preset second temperature, at which time the fan is controlled to stop; The first temperature is greater than the second temperature.

2. The refrigerator according to claim 1, wherein The controller is further configured to: When the difference between the target temperature and the evaporating temperature is less than the first temperature, the current operating frequency of the compressor is maintained, the speed of the compressor is reduced by a preset first amplitude, and the speed of the fan is reduced by a preset second amplitude, and the operation is performed for a preset time.

3. The refrigerator according to claim 1, wherein The controller is further configured to: When the difference between the target temperature and the evaporation temperature is not less than the second temperature, the rotation speed of the fan is increased by a preset third amplitude and is run for a preset time period.

4. The refrigerator according to claim 1, wherein The storage room also includes a cold storage room; The refrigeration air duct also includes a refrigeration damper for controlling the amount of cold delivered to the refrigeration chamber; The controller is further configured to: After receiving the compartment function conversion instruction, the compressor and the fan are controlled to start, and the refrigeration damper is controlled according to a preset control strategy.

5. The refrigerator according to claim 4, wherein: The refrigerator further comprises: a second temperature sensor, configured to detect the refrigeration temperature of the refrigeration chamber; The controller is further configured to: When the detected refrigeration temperature is lower than a preset low temperature threshold, closing the refrigeration damper; When the detected refrigeration temperature is higher than a preset high temperature threshold, opening the refrigeration damper; The high temperature threshold is not lower than the low temperature threshold.

6. The refrigerator according to claim 5, wherein The controller is further configured to: When the difference between the target temperature and the evaporation temperature is not less than the second temperature, the low temperature threshold is reduced by a preset fourth amplitude.

7. The refrigerator according to claim 1, wherein The refrigerator further comprises: a third temperature sensor, configured to detect a freezing temperature of the freezing chamber; The controller is further configured to: After the fan is controlled to stop, the operations of the fan and the compressor are controlled according to the detected freezing temperature and the target temperature.

8. A method for converting the function of a refrigerator compartment, characterized in that: The refrigerator comprises: a box body, in which at least one storage compartment is formed, the storage compartment including a freezer compartment; The refrigeration system consists of a refrigeration cycle pipeline consisting of a compressor, a condenser, a capillary tube and an evaporator connected in sequence; a refrigeration air duct, which is in communication with the freezing chamber via an air outlet connected to the freezing chamber, and is equipped with a fan for transmitting the cooling energy of the evaporator arranged therein to the freezing chamber; a first temperature sensor, configured to detect an evaporation temperature of the evaporator; Controller; The method comprises: Setting the target temperature of the freezing chamber to a preset functional temperature and detecting the evaporation temperature of the evaporator; When the difference between the target temperature and the evaporating temperature is not less than a preset first temperature, the compressor is controlled to stop, and the fan is kept running at preset parameters until the difference between the target temperature and the evaporating temperature is less than a preset second temperature, at which time the fan is controlled to stop; The first temperature is greater than the second temperature.

9. The refrigerator compartment function conversion method according to claim 8, characterized in that: The method further comprises: When the difference between the target temperature and the evaporating temperature is less than the first temperature, the current operating frequency of the compressor is maintained, the speed of the compressor is reduced by a preset first amplitude, and the speed of the fan is reduced by a preset second amplitude, and the operation is performed for a preset time.

10. The refrigerator compartment function conversion method according to claim 8, wherein: The method further comprises: When the difference between the target temperature and the evaporation temperature is not less than the second temperature, the rotation speed of the fan is increased by a preset third amplitude and is run for a preset time period.

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