Refrigerator

Abstract

The refrigerator comprises a refrigerating chamber, a freezing chamber, a first cavity, a second cavity and an air door assembly, the first cavity and the second cavity are arranged between the refrigerating chamber and the freezing chamber, a first evaporator is arranged in the first cavity, a second evaporator is arranged in the second cavity, and when the first evaporator needs to be defrosted, the second evaporator does not need to be defrosted; the adjusting valve is switched to enable a refrigerant not to flow through the first evaporator, the air door assembly is switched to enable the first cavity to communicate with the refrigerating chamber, air flow in the refrigerating chamber is used for defrosting the first evaporator, and in the process, when the refrigerating temperature meets a first preset starting condition, the states of the air door assembly and the adjusting valve are kept, and the refrigerating fan is controlled to operate at a first rotating speed; the evaporator is arranged between the refrigerating chamber and the freezing chamber, the cooling capacity transmission path is reduced, the defrosting efficiency and the refrigerating efficiency of the refrigerating chamber are improved, meanwhile, the heat exchange efficiency is controlled by controlling the rotating speed of the refrigerating fan, and the temperature of the refrigerating chamber is accurately controlled.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigerators, and particularly relates to a refrigerator. Background Art

[0002] A refrigerator mainly consists of components such as a compressor, a condenser, an expansion valve, an evaporator, and a fan. The compressor sucks in the low-temperature and low-pressure refrigerant gas from the evaporator, compresses it to become a high-temperature and high-pressure superheated steam after compression by the compressor, and discharges it into the condenser. The condenser dissipates heat to the surrounding air to become a high-pressure subcooled liquid. The high-pressure subcooled liquid undergoes throttling expansion and pressure reduction through the expansion valve to become a low-temperature and low-pressure wet steam state and enters the evaporator to vaporize and absorb heat for refrigeration. An evaporator, a fresh food compartment air damper leading to the fresh food compartment, and a freezer air damper leading to the freezer are provided in the cold air passage.

[0003] Since the humid air outside will enter the box body when the refrigerator door is opened, after the refrigerator operates for a period of time, a layer of frost will condense on the surface of the evaporator. It is necessary to defrost in time, otherwise it will affect the refrigeration capacity of the refrigerator.

[0004] In related technologies, some refrigerators are provided with heaters on one side of the evaporator to heat the evaporator to achieve defrosting of the evaporator, but this will cause an increase in the overall energy consumption of the refrigerator. There is also a part of refrigerators that adopt the method of independent configuration of double evaporators, and the double evaporators are arranged on the back of the refrigerator. The air flow in the fresh food compartment is used to exchange heat with the evaporator to defrost the evaporator. However, in this process, when the defrosting time is relatively long, the temperature in the fresh food compartment will be too low, resulting in a decline in the preservation quality of food ingredients, and there will also be an incomplete defrosting situation of the evaporator.

[0005] In view of this, this application is proposed. Summary of the Invention

[0006] An embodiment of the present application proposes a refrigerator, which is provided with two evaporators. The two evaporators are arranged between the fresh food compartment and the freezer compartment, and the air ducts between the chambers where the two evaporators are located and the fresh food compartment and the freezer compartment are connected, so as to use the temperature of evaporator defrosting to refrigerate the fresh food compartment, realizing the reuse of cold energy while achieving evaporator defrosting and reducing the overall energy consumption of the refrigerator.

[0007] In a first aspect, an embodiment of the present application proposes a refrigerator, including a fresh food compartment and a freezer compartment for refrigerating or freezing food ingredients.

[0008] The refrigerator further includes a fresh food compartment fan, a fresh food compartment temperature detection component arranged in the fresh food compartment, and a refrigeration system. The fresh food compartment fan is used to drive the heat exchange of the air flow in the fresh food compartment, the fresh food compartment temperature detection component is used to detect the fresh food compartment temperature, and the refrigeration system includes a compressor, a condenser, an expansion valve, and an evaporator assembly.

[0009] The evaporator assembly includes a regulating valve, a first evaporator, and a second evaporator. The input end of the regulating valve is connected to the output end of the expansion valve and is used to regulate the refrigerant flow rate. The input end of the first evaporator is connected to the first output end of the regulating valve, and the input end of the second evaporator is connected to the second output end of the regulating valve.

[0010] The refrigerator further includes a first chamber and a second chamber disposed between the refrigerating chamber and the freezing chamber. The first chamber is used to accommodate the first evaporator, and the second chamber is used to accommodate the second evaporator.

[0011] The refrigerator further includes a damper assembly that is at least used to control the communication between the first chamber and the refrigerating chamber or the communication between the second chamber and the freezing chamber.

[0012] The controller of the refrigerator is configured such that when the first evaporator needs defrosting and the second evaporator does not need defrosting: switch the regulating valve so that the refrigerant does not flow through the first evaporator, switch the damper assembly so that the first chamber communicates with the refrigerating chamber, and use the air flow in the refrigerating chamber to defrost the first evaporator while using the defrosting temperature to refrigerate the refrigerating chamber;

[0013] During the process of defrosting using the air flow in the refrigerating chamber, when the refrigerating temperature meets the first preset startup condition, maintain the states of the damper assembly and the regulating valve, and control the refrigerating fan to operate at the first speed.

[0014] In the above solution, by disposing the evaporator between the refrigerating chamber and the freezing chamber, the cold quantity transmission path between the first chamber and the refrigerating chamber or between the second chamber and the refrigerating chamber is reduced, and the defrosting efficiency and the refrigerating efficiency of the refrigerating chamber are improved.

[0015] When the first evaporator needs defrosting and the refrigerating chamber needs refrigeration, the first chamber and the refrigerating chamber can be communicated, and the air flow above zero degree in the refrigerating chamber is used to defrost the first evaporator. No additional heat source is required, and the overall energy efficiency of the refrigerator is relatively high. At the same time, the cold quantity generated during the defrosting of the first evaporator is used to refrigerate the refrigerating chamber, realizing the reuse of cold quantity and improving the overall energy efficiency of the refrigerator.

[0016] And during the heat exchange between the refrigerating chamber and the first evaporator, the heat exchange speed is regulated by controlling the rotation speed of the refrigerating fan, so as to achieve precise control of the refrigerating temperature.

[0017] In some embodiments, the refrigerator further includes a first evaporation temperature detection component and a second evaporation temperature detection component. The first evaporation temperature detection component is disposed on the surface of the first evaporator and is used to detect the first evaporation surface temperature; the second evaporation temperature detection component is disposed on the surface of the second evaporator and is used to detect the second evaporation surface temperature;

[0018] The controller of the refrigerator is configured to determine that the first evaporator needs defrosting when the first evaporation surface temperature is less than the first preset temperature, and determine that the second evaporator does not need defrosting when the second evaporation surface temperature is less than the second preset temperature.

[0019] By judging whether the evaporator needs defrosting through the surface temperature of the evaporator, automatic defrosting of the refrigerator is realized.

[0020] In some embodiments, the refrigerator further includes a freezing temperature detection component, and the air damper assembly is also used to control the communication between the second chamber and the refrigerating chamber or the communication between the second chamber and the freezing chamber;

[0021] The freezing temperature detection component is arranged in the freezing chamber and is used to detect the temperature of the freezing chamber;

[0022] The controller is configured to, during the defrosting process of the first evaporator, when the freezing temperature meets the second preset startup condition, control the compressor to operate, switch the regulating valve to make the refrigerant flow through the second evaporator, adjust the air damper assembly to make the second chamber communicate with the freezing chamber, and use the second evaporator to refrigerate the freezing chamber.

[0023] By providing the first evaporator and the second evaporator, when one of the evaporators is defrosting, the other evaporator can be used to refrigerate the freezing chamber, ensuring the refrigeration demand of the refrigerator.

[0024] In some embodiments, the controller is configured to, during the defrosting process using the air flow in the refrigerating chamber, when the refrigerating temperature meets the first preset shutdown condition, switch the air damper assembly to cut off the communication between the first chamber and the refrigerating chamber, and control the refrigerating fan to stop.

[0025] Through the above, during the process of cooling the refrigerating chamber by exchanging cold energy between the refrigerating chamber and the first evaporator, when the refrigerating temperature reaches the shutdown condition, the refrigeration of the refrigerating chamber is stopped to prevent the temperature in the refrigerating chamber from being too low and affecting the storage quality in the refrigerating chamber.

[0026] In some embodiments, the controller is configured to, after controlling the refrigerating fan to stop, when the refrigerating temperature meets the first preset startup condition again, start the refrigerating fan, open the air damper assembly to make the first chamber communicate with the refrigerating chamber again, the air flow in the refrigerating chamber exchanges heat with the first evaporator, use the defrosting temperature of the first evaporator to cool the refrigerating chamber, and at the same time use the temperature of the refrigerating chamber to defrost the first evaporator again.

[0027] By reasonably utilizing the heat exchange characteristics between the refrigerating chamber and the first chamber, rapid recovery of the refrigerating temperature and efficient completion of evaporator defrosting are realized. This design not only improves the operating efficiency of the system, but also takes into account energy conservation and optimization of equipment life.

[0028] In some embodiments, the controller is configured to switch the damper assembly to connect the refrigerating chamber and the second chamber when the defrosting of the first evaporation surface temperature is completed and the refrigerating temperature does not meet the first preset shutdown condition, and use the second evaporator to continue refrigerating the refrigerating chamber.

[0029] After the defrosting of the first evaporator is completed, the refrigerating demand of the refrigerating chamber still exists. By switching the damper to connect the refrigerating chamber and the second chamber and using the refrigerating capacity of the second evaporator, the problem of the increase in the refrigerating temperature caused by the inability of the first evaporator to refrigerate can be avoided. This design makes full use of the remaining refrigerating capacity of the second evaporator and improves the refrigerating efficiency of the whole system. At the same time, it avoids the direct refrigeration and re-frosting of the moisture that has not been drained after the defrosting of the first evaporator.

[0030] In some embodiments, the controller is configured to preferentially use the first evaporator for refrigerating when the freezer needs refrigerating;

[0031] During the refrigerating process of the freezer by the first evaporator, when the refrigerating temperature meets the first preset startup condition, switch the regulating valve so that the refrigerant flows through the second evaporator and does not flow through the first evaporator, adjust the damper assembly to connect the refrigerating chamber and the first chamber, and use the remaining cold quantity of the first evaporator to cool down the refrigerating chamber;

[0032] Then, adjust the damper assembly to connect the freezer and the second chamber, and use the temperature of the second evaporator to cool down the freezer.

[0033] In the above, the first evaporator and the second evaporator are in a master-slave relationship. The first evaporator is preferentially used for refrigerating to achieve rapid response. When the refrigerating chamber needs refrigerating, the remaining cold quantity of the first evaporator is used to cool down the refrigerating chamber, effectively avoiding cold quantity waste, realizing the simultaneous refrigeration of the refrigerating chamber and the freezer, and improving the overall utilization rate of the equipment.

[0034] Through reasonable switching of the refrigerant flow direction and damper adjustment, the efficient cooperative refrigeration of the freezer and the refrigerating chamber is realized, achieving the effects of energy saving, precise temperature control and maximized utilization of resources.

[0035] In some embodiments, the refrigerator further includes a heating component, which is arranged in the refrigerating chamber; during the defrosting process using the air flow in the refrigerating chamber, when the refrigerating temperature meets the first preset shutdown condition, keep the state of the damper assembly, keep the refrigerating fan running, and turn on the heating component to compensate for the temperature reduction of the refrigerating chamber due to defrosting.

[0036] By introducing a heating component and continuously operating the refrigerating fan, the refrigerator can effectively compensate for the temperature drop caused by the melting of condensed water during the defrosting process and maintain the stability of the refrigerating temperature. This design not only improves the defrosting efficiency but also enhances the temperature control ability of the refrigerating chamber, reflecting the intelligent and user-friendly design concept. At the same time, by maintaining the state of the air damper assembly, the air flow circulation is further optimized, improving the energy efficiency and reliability of the entire system.

[0037] In some embodiments, when the freezing temperature meets the second preset shutdown condition, the air damper assembly is switched to disconnect the communication between the second chamber and the freezer. By switching the air damper assembly to cut off the communication between the freezer and the second chamber, the heat exchange between the second evaporator and the freezer is cut off, preventing the temperature in the freezer from being too low and keeping the freezer within a stable temperature range to ensure the quality of frozen food.

[0038] In some embodiments, when the freezing temperature meets the second preset shutdown condition and the temperature of the first evaporation surface reaches the third preset temperature, it is determined that the defrosting of the first evaporator is completed;

[0039] When the refrigerating temperature does not meet the first preset shutdown condition, the air damper assembly is switched so that the refrigerating chamber is not connected to the first chamber and is connected to the second chamber, and the second evaporator is used to refrigerate the refrigerating chamber.

[0040] After the defrosting is completed, when the refrigerating chamber has not reached the shutdown temperature, the residual cold energy after the second evaporator has just finished refrigerating is used for refrigeration, improving the utilization rate of cold energy and the overall energy consumption of the refrigerator.

[0041] In a second aspect, an embodiment of the present application also provides a refrigerator, including a refrigerating chamber and a freezing chamber for refrigerating or freezing food ingredients.

[0042] The refrigerator further includes a refrigerating fan, a refrigerating temperature detection component disposed in the refrigerating chamber, and a refrigeration system. The refrigerating fan is used to accelerate the heat exchange of the air flow in the refrigerating chamber, the refrigerating temperature detection component is used to detect the refrigerating temperature, and the refrigeration system includes a compressor, a condenser, an expansion valve, and an evaporator assembly.

[0043] The evaporator assembly includes a regulating valve, a first evaporator, and a second evaporator. The input end of the regulating valve is connected to the output end of the expansion valve for regulating the refrigerant flow rate; the input end of the first evaporator is connected to the first output end of the regulating valve, and the input end of the second evaporator is connected to the second output end of the regulating valve.

[0044] The refrigerator further includes a first chamber and a second chamber disposed between the refrigerating chamber and the freezing chamber. The first chamber is used to accommodate the first evaporator, and the second chamber is used to accommodate the second evaporator.

[0045] The refrigerator further includes an air damper assembly, which is used to control the communication between the first chamber and the refrigerating chamber or the communication between the first chamber and the freezing chamber, and to control the communication between the second chamber and the refrigerating chamber or the communication between the second chamber and the freezing chamber;

[0046] When the air damper assembly is in the first position, the refrigerating chamber is in communication with the first chamber, and the air flow in the refrigerating chamber exchanges heat with the first evaporator, and the refrigerating chamber is used to defrost the first evaporator;

[0047] When the air damper assembly is in the second position, the refrigerating chamber is in communication with the second chamber, and the air flow in the refrigerating chamber exchanges heat with the second evaporator, and the refrigerating chamber is used to defrost the second evaporator.

[0048] By providing independent first and second chambers inside the refrigerator, the two evaporators do not interfere with each other, improving the flexibility of the refrigeration system. Through the control of the air damper assembly, the refrigerating chamber can be used to defrost the first evaporator or the second evaporator.

[0049] At the same time, a dual-evaporator structure is provided, and the two evaporators are set with working priorities. When one evaporator is defrosting, the other evaporator can continue to perform refrigeration work.

[0050] Moreover, the dual evaporators are arranged between the refrigerating chamber and the freezing chamber, which improves the space utilization rate while reducing the distance of cold quantity transfer and reducing the cold quantity loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0052] Figure 1 is a side view of the refrigerator in the embodiment of the present application;

[0053] Figure 2 is a schematic structural diagram of the refrigerating air duct of the refrigerator in the embodiment of the present application;

[0054] Figure 3 is a schematic structural diagram of the freezing air duct of the refrigerator in the embodiment of the present application;

[0055] Figure 4 is Figure 1 a partial cross-sectional view at the A-A position when the air valve assembly is in the open state in

[0056] Figure 5 is Figure 1Partial cross-sectional view at position A-A when the air valve assembly is in the closed state;

[0057] Figure 6 is Figure 1 Partial cross-sectional view at position B-B when the air valve assembly is in the open state;

[0058] Figure 7 is Figure 1 Partial cross-sectional view at position B-B when the air valve assembly is in the closed state;

[0059] Figure 8 is Figure 1 Cross-sectional view at position C-C;

[0060] Figure 9 is the schematic diagram of the refrigeration system in the embodiment of the present application;

[0061] Figure 10 is the control logic for defrosting and refrigeration of the refrigerator in the embodiment of the present application;

[0062] Figure 11 is the refrigeration control logic of the refrigerator in the embodiment of the present application;

[0063] Figure 12 is the refrigeration control logic when the first evaporator and the second evaporator in the refrigerator do not need defrosting in the embodiment of the present application.

[0064] The reference numerals are as follows:

[0065] 1 - Refrigerator; 10 - Refrigerating compartment; 20 - Freezing compartment; 11 - Refrigerating air duct; 12 - Refrigerating fan;

[0066] 21 - Freezing air duct; 22 - Freezing fan; 30 - First chamber; 40 - Second chamber;

[0067] 31 - First evaporator; 41 - Second evaporator; 60 - Air door assembly;

[0068] 601 - First air door; 602 - Second air door; 6011 - First air duct;

[0069] 6012 - First electric air valve; 6021 - Second electric air valve; 6022 - Second air duct;

[0070] 50 - Door; 51 - Cabinet; 60 - Compressor; 61 - Condenser;

[0071] 62 - Expansion valve; 63 - Regulating valve. Detailed implementation manners

[0072] To make the objectives and implementation manners of this application clearer, the following will clearly and completely describe the exemplary implementation manners of this application with reference to the accompanying drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only a part of the embodiments of this application, rather than all of the embodiments.

[0073] It should be noted that the brief description of the terms in this application is only for facilitating the understanding of the subsequent described implementation manners, rather than intending to limit the implementation manners of this application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0074] In this application, terms such as "first", "second", "third", etc. in the description, claims and the above-mentioned accompanying drawings are used to distinguish similar or homogeneous objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that such terms can be interchanged under appropriate circumstances.

[0075] The terms "comprising" and "having" and any variations thereof are intended to cover but not exclusively include. For example, a product or device comprising a series of components does not necessarily have to be limited to all the clearly listed components, but may include other components that are not clearly listed or are inherent to these products or devices.

[0076] An embodiment of this application provides a refrigerator 1, and the refrigerator 1 includes a cabinet 51. The cabinet 51 is a basic component of the refrigerator 1 of this application. The cabinet 51 can provide an installation basis for at least some other components of the refrigerator 1 and serve the purpose of protecting at least some other components.

[0077] The cabinet 51 can be prepared from a metallic material, so that the cabinet 51 has better structural strength, thereby making the durability and reliability of the cabinet 51 better. Of course, the cabinet 51 can also be prepared from a polymeric material, so that while the cabinet 51 has better structural strength, the weight is relatively light, which can make the weight of the refrigerator 1 lighter.

[0078] The interior of the cabinet 51 defines a storage compartment. The cabinet 51 forms the outer contour of the refrigerator 1.

[0079] The cabinet 51 includes an inner liner that defines the storage compartment and an outer shell that is connected to the outside of the inner liner to form the appearance of the refrigerator 1.

[0080] The cabinet 51 further includes a heat insulation layer disposed between the inner liner and the outer shell for insulating the storage compartment. Generally, the heat insulation layer is filled with foaming material.

[0081] The refrigerator 1 further includes a plurality of doors 50, and the doors 50 are connected to the cabinet 51 to open or close the storage compartment. Each storage compartment corresponds to one or more doors 50.

[0082] The inner liner of the cabinet 51 defines multiple storage compartments. Refer to Figure 1 , in some embodiments of the present application, the multiple storage compartments include a refrigerating compartment 10 and a freezing compartment 20 located below the refrigerating compartment 10. The refrigerating compartment 10 is used for refrigerating food ingredients. The freezing compartment 20 is used for freezing food ingredients.

[0083] The refrigerating compartment 10 is used to store food ingredients that need to be stored at a low temperature but do not need to be frozen. Generally, the operating temperature of the refrigerating compartment 10 is greater than zero degrees. The freezing compartment 20 is used for long-term storage of food ingredients that need to be frozen. The operating temperature of the freezing compartment 20 is always below zero.

[0084] By setting different temperature zones, the storage requirements of different food ingredients are ensured to be met.

[0085] It should be noted that the setting of the multiple storage compartments of the refrigerator 1 is not limited to the above examples.

[0086] A pick-and-place opening is formed at the front end of the refrigerating compartment 10 and the freezing compartment 20 to place food into or take food out of the refrigerating compartment 10 / freezing compartment 20. The cabinet door 50 is used to open or close the pick-and-place opening.

[0087] Refer to Figure 1 , Figure 2 , the refrigerator 1 includes a refrigerating air duct 11. The refrigerating air duct 11 is arranged at the rear side of the refrigerating compartment 10.

[0088] The refrigerator 1 further includes a refrigerating fan 12. The refrigerating fan 12 is arranged in the refrigerating air duct 11. The refrigerating fan 12 is used to drive the heat exchange of the air flow in the refrigerating compartment 10. The cooling time is shortened and the refrigeration efficiency is improved. When starting, the refrigerating fan 12 is used to discharge the cold air in the refrigerating air duct 11 through the refrigerating air outlet to refrigerate the refrigerating compartment 10.

[0089] Refer to Figure 1 , Figure 3 , the refrigerator 1 includes a freezing air duct 21. The freezing air duct 21 is arranged at the rear side of the freezing compartment 20.

[0090] The refrigerator 1 further includes a freezing fan 22. The freezing fan 22 is arranged in the freezing air duct 21. When starting, the freezing fan 22 is used to discharge the cold air in the freezing air duct 21 through the freezing air outlet to refrigerate the freezing compartment 20.

[0091] Refer to Figure 9 , the refrigerator 1 includes a refrigeration system. The refrigeration system includes a compressor, a condenser, an expansion valve and an evaporator assembly. The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process.

[0092] Among them, the compression process is as follows: The compressor starts to work, and the refrigerant at low temperature and low pressure is sucked into the compressor. After being compressed into a superheated gas at high temperature and high pressure in the compressor cylinder, it is discharged into the condenser.

[0093] The condensation process is as follows: The refrigerant gas at high temperature and high pressure dissipates heat through the condenser, and its temperature continuously drops, gradually being cooled into a saturated vapor at normal temperature and high pressure, and further cooled into a saturated liquid.

[0094] The throttling process is as follows: The condensed refrigerant saturated liquid flows into the expansion valve, and through it, the pressure is reduced by throttling, and the refrigerant becomes a wet vapor at normal temperature and low pressure.

[0095] The evaporation process is as follows: The wet vapor at normal temperature and low pressure starts to absorb heat and vaporize in the evaporator assembly, not only reducing the temperature of the evaporator assembly and its surroundings, but also turning the refrigerant into a gas at low temperature and low pressure. The refrigerant coming out of the evaporator assembly returns to the compressor again. By repeating the above process, the heat in the refrigerator 1 is transferred to the air outside the box, achieving the purpose of refrigeration.

[0096] In some embodiments, the evaporator assembly includes a regulating valve. The input end of the regulating valve is connected to the output end of the expansion valve, and the regulating valve is used to regulate the refrigerant flow rate to ensure the effective distribution of the refrigerant in the first evaporator 31 and the second evaporator 41.

[0097] In some embodiments, the evaporator assembly includes a first evaporator 31 and a second evaporator 41. The input end of the first evaporator 31 is connected to the first output end of the regulating valve, and the input end of the second evaporator 41 is connected to the second output end of the regulating valve.

[0098] By setting two evaporators, the two evaporators can independently refrigerate the refrigerating chamber 10 or the freezing chamber 20, enabling the refrigerating chamber 10 and the freezing chamber 20 to independently control the temperature and ensuring the preservation quality of the food materials.

[0099] Through the reasonable configuration of the regulating valve and the evaporator, the waste of the refrigerant is reduced, the refrigeration efficiency is improved, and the energy consumption is lowered.

[0100] In some embodiments, the first evaporator 31 and the second evaporator 41 are arranged on the back of the refrigerator 1. The first evaporator 31 and the second evaporator 41 can communicate with the refrigerating chamber 10, and utilize the air flow in the refrigerating chamber 10 to exchange heat with the evaporator for defrosting the evaporator. However, during this process, when the defrosting time is relatively long, the temperature in the refrigerating chamber 10 will be too low, resulting in a decline in the preservation quality of the food materials and incomplete defrosting of the evaporator.

[0101] Refer to Figure 8, the refrigerator 1 further includes a first chamber 30 and a second chamber 40 disposed between the refrigerating chamber 10 and the freezing chamber 20. The first chamber 30 is used to accommodate a first evaporator 31, and the second chamber 40 is used to accommodate a second evaporator 41.

[0102] The independent design of the first chamber 30 and the second chamber 40 enables the refrigeration and defrosting of the refrigerating chamber 10 and the freezing chamber 20 to not interfere with each other, improving the flexibility and reliability of the system. At the same time, it ensures that the refrigeration requirements of the refrigerating chamber 10 and the freezing chamber 20 can be met in a timely manner.

[0103] In the embodiment of the present application, by disposing two evaporators in the first chamber 30 and the second chamber 40 between the refrigerating chamber 10 and the freezing chamber 20, the space of the refrigerating chamber 10 and the freezing chamber 20 is not occupied, thereby significantly improving the effective storage space.

[0104] Moreover, the independent design of the first chamber 30 and the second chamber 40 enables the refrigerating chamber 10 and the freezing chamber 20 to better divide the functional areas, further improving the space utilization rate.

[0105] The evaporators in the first chamber 30 and the second chamber 40 are located between the refrigerating chamber 10 and the freezing chamber 20, closer to the core areas of the refrigerating chamber 10 and the freezing chamber 20. Cold air can directly enter the refrigerating chamber 10 or the freezing chamber 20, reducing the distance of cold quantity transfer, reducing the cold quantity loss, and reducing the temperature difference.

[0106] In some embodiments, referring to Figure 8 , the first chamber 30 and the second chamber 40 are arranged side by side. In some possible implementation manners, the first chamber 30 and the second chamber 40 are stacked.

[0107] The evaporators in the first chamber 30 and the second chamber 40 are directly embedded inside the refrigerator 1, reducing the additional support structure and making the overall structure more compact.

[0108] Referring to Figure 8 , the refrigerator 1 includes a damper assembly 60. The damper assembly 60 is used to control the communication between the first chamber 30 and the refrigerating chamber 10 or the communication between the first chamber 30 and the freezing chamber 20, and / or is used to control the communication between the second chamber 40 and the refrigerating chamber 10 or the communication between the second chamber 40 and the freezing chamber 20

[0109] Referring to Figure 4 、 Figure 5 、 Figure 8 , the damper assembly 60 includes a first damper 601. The first damper 601 is disposed at a position close to the front end. The first damper 601 includes a first electric air valve 6012 and a first air duct 6011. The first air duct 6011 is used to connect the first chamber 30, the second chamber 40, the refrigerating chamber 10, and the freezing chamber 20.

[0110] Reference Figure 4 , the first air door 601 is in the open state. At this time, the first air door is in the first position, and at this time, the refrigerating chamber 10 is communicated with the first chamber 30. Reference Figure 5 , the first air door 601 is in the closed state. At this time, the first air door is in the second position, and at this time, the refrigerating chamber 10 is communicated with the second chamber 40.

[0111] Reference Figure 6 、 Figure 7 、 Figure 8 , the air door assembly 60 includes a second air door 602. The second air door 602 is arranged at a position close to the rear end. The second air door 602 includes a second electric air valve 6022 and a second air duct 6021. The second air duct 6021 is used to connect the first chamber 30, the second chamber 40, the refrigerating chamber 10 and the freezing chamber 20.

[0112] Reference Figure 6 , the second air door 602 is in the open state. At this time, the second air door is in the first position, and at this time, the refrigerating chamber 10 is communicated with the first chamber 30. Reference Figure 7 , the second air door 602 is in the closed state. At this time, the second air door is in the second position, and at this time, the refrigerating chamber 10 is communicated with the second chamber 40.

[0113] In the above, when the first air door 601 and the second air door 602 are in the open state, the air door assembly 60 is in the first position, and when the first air door 601 and the second air door 602 are in the closed state, the air door assembly 60 is in the second position.

[0114] It should be noted that the technical solution protected by the embodiments of the present application lies in the communication between the chambers under the defrosting or refrigeration working conditions. The air door assembly 60 in the drawings is only an example, and those skilled in the art can replace the specific setting manner of the air door assembly 60 according to requirements such as size and cost.

[0115] When the first air door 601 is in the open state and the second air door 602 is in the open state, the refrigerating chamber 10 is communicated with the first chamber 30, and the air flow path that can be formed is: refrigerating chamber 10, first air door 601, first chamber 30, second air door 602, refrigerating chamber 10, forming an air flow cycle, and thus realizing the heat exchange between the refrigerating chamber 10 and the first chamber 30.

[0116] At this time, the freezing chamber 20 is communicated with the second chamber 40. When the second evaporator 41 is in the refrigeration state, the air flow path that can be formed is: freezing chamber 20, first air door 601, second chamber 40, second air door 602, freezing chamber 20, forming an air flow cycle, and thus realizing the heat exchange between the freezing chamber 20 and the second chamber 40.

[0117] When the second air damper 602 is in the closed state, the cold storage compartment 10 communicates with the second chamber 40. The airflow path that can be formed is: cold storage compartment 10, first air damper 601, second chamber 40, second air damper 602, cold storage compartment 10, forming an air circulation, and thus realizing the heat exchange between the cold storage compartment 10 and the second chamber 40.

[0118] At this time, the freezer compartment 20 communicates with the first chamber 30. When the first evaporator 31 is in the refrigeration state, the airflow path that can be formed is: freezer compartment 20, first air damper 601, first chamber 30, second air damper 602, freezer compartment 20, forming an air circulation, and thus realizing the heat exchange between the freezer compartment 20 and the first chamber 30.

[0119] By setting the first air damper 601 and the second air damper 602, independent temperature control of the cold storage compartment 10 and the freezer compartment 20 can be achieved, and the temperature can be adjusted separately to ensure the preservation quality of the food materials.

[0120] The refrigerator 1 further includes a cold storage temperature detection component. The cold storage temperature detection component is installed in the cold storage compartment 10, and the cold storage temperature detection component is used to detect the cold storage temperature. By setting the cold storage temperature detection component, the cold storage temperature is ensured to always be maintained within the set range, avoiding being too cold or too hot.

[0121] The refrigerator 1 further includes a freezer temperature detection component. The freezer temperature detection component is installed in the freezer compartment 20. The freezer temperature detection component is used to detect the temperature of the freezer compartment 20.

[0122] The refrigerator 1 includes a first evaporation temperature detection component. The first evaporation temperature detection component is arranged on the surface of the first evaporator 31, and the first evaporation temperature detection component is used to detect the first evaporation surface temperature. According to the first evaporation surface temperature, it can be judged whether the first evaporator 31 needs to defrost or whether the defrosting is over, and the working state of the first evaporator 31 can be obtained in time, avoiding the reduction of the refrigeration efficiency caused by the surface of the evaporator being too cold or too hot.

[0123] The refrigerator 1 includes a second evaporation temperature detection component. The second evaporation temperature detection component is arranged on the surface of the second evaporator 41, and the second evaporation temperature detection component is used to detect the second evaporation surface temperature.

[0124] By setting the independent first chamber 30 and second chamber 40, the two evaporators do not interfere with each other, improving the flexibility of the refrigeration system. Through the control of the air damper, the cold quantity distribution between the cold storage compartment 10 and the freezer compartment 20 can be flexibly adjusted to ensure the balance of the temperature inside the entire refrigerator 1.

[0125] At the same time, a dual-evaporator structure is set, and the two evaporators are set with a working priority. When one of the evaporators is defrosting, the other evaporator can continue to perform the refrigeration work.

[0126] Moreover, by arranging the dual evaporators between the refrigerating chamber 10 and the freezing chamber 20, while improving the space utilization rate, the distance of cold quantity transfer is reduced, and the cold quantity loss is lowered.

[0127] Through the synergistic action of the first air door 601, the second air door 602, the first evaporation temperature detection component and the second evaporation temperature detection component, precise temperature control and dynamic distribution of cold quantity are achieved.

[0128] Among them, the switching states of the first air door 601 and the second air door 602 determine the flow path of the cold air. Combining the feedback temperatures of the first evaporation temperature detection component and the second evaporation temperature detection component, precise temperature control of the refrigerating chamber 10 and the freezing chamber 20 can be achieved, and defrosting of the first evaporator 31 and the second evaporator 41 can also be realized.

[0129] The combined operation of each air door and each evaporation temperature detection component enables the refrigerator 1 to dynamically adjust the cold quantity distribution according to actual needs, improving the response speed and adaptability of the system.

[0130] In the above, by proposing a refrigerator 1 with a dual evaporator system and a multi-chamber design, while realizing the refrigeration and freezing functions, the temperature control and refrigerant distribution efficiency are optimized.

[0131] In some embodiments, the refrigerator 1 further includes a controller. The controller is used to control the overall working logic of the refrigerator 1.

[0132] In some embodiments, the controller of the refrigerator 1 is configured to determine that the first evaporator 31 needs defrosting when the first evaporation surface temperature is less than the first preset temperature, and determine that the second evaporator 41 does not need defrosting when the second evaporation surface temperature is less than the second preset temperature.

[0133] In some embodiments, when the first evaporator 31 needs defrosting and the second evaporator 41 does not need defrosting, the regulating valve is switched so that the refrigerant does not flow through the first evaporator 31, and the air door assembly 60 is switched so that the first chamber 30 is communicated with the refrigerating chamber 10. The air flow in the refrigerating chamber 10 is used to defrost the first evaporator 31 while the refrigerating chamber 10 is refrigerated using the defrosting temperature.

[0134] In some embodiments, during the defrosting process using the air flow in the refrigerating chamber 10, when the refrigerating temperature meets the first preset startup condition, the states of the air door assembly 60 and the regulating valve are maintained, and the refrigerating fan 12 is controlled to operate at the first rotation speed.

[0135] It should be noted that the first preset startup condition refers to the condition satisfied when the refrigerating chamber 10 is refrigerated. The first preset startup condition can be set based on the temperature range for storing refrigerated food.

[0136] In some embodiments, the rotation speed of the refrigerating fan 12 is controlled in gears according to the difference between the refrigerating temperature and the set temperature. The greater the difference between the refrigerating temperature and the set temperature, the higher the gear of the refrigerating fan 12. Precise control of the temperature in the refrigerating chamber 10 is achieved through stepped adjustment.

[0137] In the above technical solution, when the first evaporator 31 needs to be defrosted and the refrigerating chamber 10 needs to be refrigerated, the first chamber 30 and the refrigerating chamber 10 can be connected, and the air flow above zero degree in the refrigerating chamber 10 is used to defrost the first evaporator 31. Without additional heat source, the overall energy efficiency of the refrigerator 1 is relatively high. At the same time, the cold quantity generated during the defrosting of the first evaporator 31 is used to refrigerate the refrigerating chamber 10, realizing the reuse of cold quantity and improving the overall energy efficiency of the refrigerator 1.

[0138] During the heat exchange between the refrigerating chamber 10 and the first evaporator 31, the rotation speed of the refrigerating fan 12 is controlled to adjust the heat exchange speed, so as to achieve precise control of the refrigerating temperature.

[0139] In the refrigeration system of the related art, the temperature reduction of the refrigerating chamber 10 mainly depends on the independent operation of the refrigerating fan 12 and the first evaporator 31, with low efficiency. By introducing the first chamber 30 to participate in the heat exchange, the time required for the refrigerating chamber 10 to cool down can be significantly shortened, thus improving the response speed of the overall system.

[0140] The first evaporator 31 is prone to be affected by the low-temperature environment during the defrosting stage, resulting in incomplete defrosting. By using the air in the refrigerating chamber 10 and the air in the first chamber 30 synergistically, the defrosting efficiency can be effectively improved, and the performance degradation caused by insufficient defrosting can be avoided.

[0141] By utilizing the temperature difference between the refrigerating chamber 10 and the first chamber 30 through heat exchange, the additional energy consumption is reduced. The system operates more smoothly, avoiding equipment wear caused by frequent start-stop of the refrigerating fan 12 or the evaporator. The equipment life is prolonged.

[0142] In some embodiments, the controller is configured to control the compressor to operate and switch the regulating valve to make the refrigerant flow through the second evaporator 41 when the freezing temperature meets the second preset startup condition during the defrosting process of the first evaporator 31.

[0143] In some embodiments, the controller is configured to adjust the second air door 602 to connect the second chamber 40 and the freezing chamber 20 and use the second evaporator 41 to refrigerate the freezing chamber 20 when the freezing temperature meets the second preset startup condition during the defrosting process of the first evaporator 31.

[0144] By providing the first evaporator 31 and the second evaporator 41, when one of the evaporators is defrosting, the other evaporator can be used to refrigerate the freezing chamber 20, ensuring the refrigeration demand of the refrigerator 1.

[0145] In some embodiments, the controller is configured to, during the defrosting process using the air flow in the refrigerating chamber 10, when the refrigerating temperature meets the first preset shutdown condition, switch the damper assembly 60 to cut off the communication between the first chamber 30 and the refrigerating chamber 10, and control the refrigerating fan 12 to stop operating.

[0146] Through the above, during the process of the refrigerating chamber 10 exchanging cold with the first evaporator 31 to cool down the refrigerating chamber 10, when the refrigerating temperature reaches the shutdown condition, the refrigeration of the refrigerating chamber 10 is stopped to prevent the temperature in the refrigerating chamber 10 from being too low and affecting the storage quality in the refrigerating chamber 10.

[0147] In some embodiments of the refrigerating chamber 10 and the first chamber 30, the controller is configured to, after controlling the refrigerating fan 12 to stop operating, when the refrigerating temperature meets the first preset startup condition again, open the damper assembly 60 to reconnect the first chamber 30 and the refrigerating chamber 10, cool down the refrigerating chamber 10 using the defrosting temperature of the first evaporator 31, and at the same time use the temperature of the refrigerating chamber 10 to defrost the first evaporator 31 again.

[0148] After the refrigerating fan 12 stops operating, the refrigerating temperature begins to rise slowly, while the first evaporator 31 is still in the defrosting stage. When the refrigerating temperature is higher than a certain threshold, it is determined that the refrigerating chamber 10 needs to be cooled down again.

[0149] The controller commands the damper assembly 60 to open, so that the refrigerating chamber 10 is reconnected to the first chamber 30. The core purpose of this step is to use the environmental characteristics in the first chamber 30 to assist in cooling down the refrigerating chamber 10.

[0150] The first chamber 30 usually has a lower defrosting temperature (lower than the temperature of the refrigerating chamber 10). Cold energy flows from the first chamber 30 to the refrigerating chamber 10, thereby accelerating the cooling process of the refrigerating chamber 10.

[0151] The air in the refrigerating chamber 10 enters the first chamber 30 through heat exchange, raising the temperature of the first chamber 30. At the same time, the heat of the first chamber 30 is transferred to the first evaporator 31 through heat conduction or radiation, promoting its defrosting.

[0152] During this process, a dynamic heat exchange cycle is formed between the refrigerating chamber 10 and the first chamber 30. The temperature of the refrigerating chamber 10 gradually returns to the target value, and at the same time, the defrosting effect of the first evaporator 31 is significantly improved.

[0153] The above control logic realizes the rapid recovery of the refrigerating temperature and the efficient completion of the evaporator defrosting by reasonably utilizing the heat exchange characteristics between the refrigerating chamber 10 and the first chamber 30. This design not only improves the operating efficiency of the system but also takes into account the optimization of energy conservation and equipment life.

[0154] In some embodiments, when the defrosting of the first evaporation surface temperature is completed and the refrigerating temperature does not meet the first preset shutdown condition, the controller is configured to switch the first air door 601 and the second air door 602 to communicate the refrigerating chamber 10 with the second chamber 40, and use the second evaporator 41 to continue refrigerating the refrigerating chamber 10.

[0155] By switching the air door, the heat exchange between the refrigerating chamber 10 and the second chamber 40 is realized, ensuring that the refrigerating temperature continuously meets the requirements and making full use of the refrigerating capacity of the second evaporator 41.

[0156] After the defrosting of the first evaporator 31 is completed, the refrigerating demand of the refrigerating chamber 10 still exists. By switching the air door to communicate the refrigerating chamber 10 with the second chamber 40 and using the refrigerating capacity of the second evaporator 41, the problem of the refrigerating temperature rising caused by the inability of the first evaporator 31 to refrigerate can be avoided. This design makes full use of the remaining refrigerating capacity of the second evaporator 41 and improves the refrigerating efficiency of the whole system.

[0157] At the same time, it is avoided that the first evaporator 31 continues to refrigerate immediately, the surface temperature of the first evaporator 31 decreases, and the condensed beads on its surface continue to frost.

[0158] By switching the air door and enabling the second evaporator 41, it can be ensured that the refrigerating temperature is always maintained within the target range, thereby reducing the unnecessary shutdown time of the system.

[0159] The above control logic realizes the heat exchange between the refrigerating chamber 10 and the second chamber 40 by switching the air door, ensuring that the refrigerating temperature continuously meets the requirements and making full use of the refrigerating capacity of the second evaporator 41. This design not only improves the refrigerating efficiency and energy utilization rate of the system, but also extends the equipment life and enhances the flexibility of the system. At the same time, it can keep the refrigerating system running stably under complex working conditions.

[0160] After the defrosting of the first evaporator 31 is completed, the refrigerating demand of the refrigerating chamber 10 still exists. By switching the air door to communicate the refrigerating chamber 10 with the second chamber 40 and using the refrigerating capacity of the second evaporator 41, the problem of the refrigerating temperature rising caused by the inability of the first evaporator 31 to refrigerate can be avoided. This design makes full use of the remaining refrigerating capacity of the second evaporator 41 and improves the refrigerating efficiency of the whole system. At the same time, it is avoided that the first evaporator 31 directly refrigerates again and condenses frost again after the moisture is not drained dry after defrosting.

[0161] Refer to Figure 10 , and illustrate the defrosting and refrigerating control logic of the refrigerator 1 in the embodiments of the present application.

[0162] During the refrigerating process of the first evaporator 31 for the refrigerating chamber 10, if the freezing chamber 20 has a refrigerating demand (S201);

[0163] Control the operation of the compressor, switch the first air door 601 and the second air door 602, connect the second chamber 40 and the freezer compartment 20, and use the second evaporator 41 to refrigerate the freezer compartment 20 (S202).

[0164] Determine whether the freezing temperature meets the second preset shutdown condition (S203);

[0165] In step S203, if it is satisfied, then execute step S204, switch the first air door 601 and the second air door 602, and disconnect the connection between the second chamber 40 and the freezer compartment 20.

[0166] When the temperature of the first evaporation surface reaches the first preset temperature, it is determined that the temperature of the first evaporator 31 is too high, and the defrosting has ended or defrosting is not required (S205).

[0167] Determine whether the refrigerating temperature meets the first preset startup condition (S206).

[0168] In step S206, if it is satisfied, then execute step S207, switch the first air door 601 and the second air door 602, connect the refrigerating compartment 10 and the second chamber 40, and use the second evaporator 41 to refrigerate the refrigerating compartment 10. When the second evaporator 41 refrigerates the refrigerating compartment 10, it is also a process of defrosting the second evaporator 41 relatively.

[0169] In step S206, if it is not satisfied, then execute step S206.

[0170] In step S203, if it is not satisfied, then execute step S208, and determine whether the refrigerating temperature meets the first preset startup condition.

[0171] In step S208, if it is not satisfied, then execute step S208.

[0172] In step S208, if it is satisfied, then execute step S209, switch the first air door 601 and the second air door 602, connect the freezer compartment 20 and the second chamber 40, and connect the refrigerating compartment 10 and the first chamber 30.

[0173] When the refrigerating temperature meets the first preset shutdown condition, switch the first air door 601 and the second air door 602, and disconnect the connection between the refrigerating compartment 10 and the first chamber 30 (S210).

[0174] When the freezing temperature meets the second preset shutdown condition, switch the second air door 602, and disconnect the connection between the second chamber 40 and the freezer compartment 20 (S211).

[0175] In a refrigeration system, the operating logic of the controller usually needs to comprehensively consider the refrigeration temperature, the defrosting requirements of the evaporator, and the heat exchange efficiency between different chambers. By optimizing the heat transfer between the refrigerating chamber 10 and the first chamber 30, the rapid recovery of the refrigeration temperature and the efficient defrosting of the evaporator are achieved. In some embodiments, when the freezer 20 needs refrigeration, the controller is configured to preferentially use the first evaporator 31 for refrigeration.

[0176] By setting the working priorities of the first evaporator 31 and the second evaporator 41, the dispersion of cooling capacity is avoided, and the loss of refrigerant circulation is reduced. Since the temperature of the freezer 20 is usually relatively low, the preferential operation of the first evaporator 31 can quickly meet the freezing requirements, and only one evaporator needs to be actuated to meet the requirements of the freezer 20, reducing the working load of the compressor.

[0177] In some embodiments, during the refrigeration process of the freezer 20 by the first evaporator 31, when the refrigeration temperature meets the first preset start-up condition, the regulating valve is switched so that the refrigerant flows through the second evaporator 41 and does not flow through the first evaporator 31. After the second evaporator 41 receives the refrigerant, it performs refrigeration, and the first evaporator 31 uses the remaining cooling capacity for refrigeration.

[0178] After the first evaporator 31 refrigerates the freezer 20, there is still some remaining cooling capacity, which is directly used to cool the refrigerating chamber 10, effectively avoiding the waste of cooling capacity. The cooling of the refrigerating chamber 10 and the freezer 20 are respectively responsible for by the first evaporator 31 and the second evaporator 41, improving the temperature control accuracy.

[0179] Through the switching of the refrigerant flow direction, when only one evaporator works on the freezer 20, the simultaneous refrigeration of the freezer 20 and the refrigerating chamber 10 is achieved, improving the overall utilization rate of the equipment.

[0180] In some embodiments, the damper assembly 60 is adjusted to connect the refrigerating chamber 10 and the first chamber 30, and the remaining cooling capacity of the first evaporator 31 is used to cool the refrigerating chamber 10.

[0181] After the damper assembly 60 is opened, the refrigerating chamber 10 is connected to the chamber where the first evaporator 31 is located, and cold air can enter the refrigerating chamber 10 more efficiently, accelerating the cooling of the refrigerating chamber 10. The remaining cooling capacity of the first evaporator 31 directly acts on the refrigerating chamber 10 through the damper, reducing the heat loss during the cooling capacity transmission process. Without additionally increasing the refrigeration equipment or changing the refrigerant path, the cooling task of the refrigerating chamber 10 can be completed only by damper adjustment.

[0182] The second damper 602 of the damper assembly 60 is adjusted to connect the freezer 20 and the second chamber 40, and the cold air in the second chamber 40 can directly act on the freezer 20 to maintain its low-temperature environment.

[0183] The second evaporator 41 provides cooling capacity for the freezer compartment 20 alone, avoiding the influence of the refrigeration process of the refrigerator compartment 10 on the temperature of the freezer compartment 20. The refrigeration requirements of the freezer compartment 20 and the refrigerator compartment 10 are processed separately, reducing the burden of long-term operation of a single evaporator and extending the service life of the equipment.

[0184] In the above, the first evaporator 31 and the second evaporator 41 are in a master-slave relationship. The first evaporator 31 is preferentially used for refrigeration to achieve rapid response. When the refrigerator compartment 10 needs refrigeration, the remaining cooling capacity of the first evaporator 31 is used to cool down the refrigerator compartment 10, effectively avoiding waste of cooling capacity, realizing simultaneous refrigeration of the refrigerator compartment 10 and the freezer compartment 20, and improving the overall utilization rate of the equipment.

[0185] Through reasonable switching of the refrigerant flow direction and damper adjustment, efficient collaborative refrigeration of the freezer compartment 20 and the refrigerator compartment 10 is achieved, achieving the effects of energy saving, precise temperature control, and maximized utilization of resources.

[0186] In some embodiments, the refrigerator 1 further includes a heating component, and the heating component is arranged in the refrigerator compartment 10.

[0187] While defrosting the evaporator using the air flow in the refrigerator compartment 10, the temperature in the refrigerator compartment 10 decreases. When the defrosting process is too long, the temperature in the refrigerator compartment 10 continues to drop. By setting the heating component, the refrigeration temperature can be quickly increased, avoiding the influence of too low temperature on the food storage quality. Setting the heating component for temperature compensation also ensures the normal progress of the defrosting process.

[0188] In some embodiments, during the defrosting process using the air flow in the refrigerator compartment 10, when the refrigeration temperature meets the first preset shutdown condition, the state of the damper assembly 60 is maintained, the refrigeration fan 12 is kept running, and the heating component is turned on to compensate for the temperature reduction of the refrigerator compartment 10 due to defrosting.

[0189] By maintaining the state of the damper assembly 60, the refrigerator compartment 10 continues to communicate with the chamber where the defrosting evaporator is located, and cold air and hot air can freely flow between the chamber and the refrigerator compartment 10.

[0190] The continuous operation of the refrigeration fan 12 in cooperation with the heating component enables hot air to spread more quickly throughout the refrigerator compartment 10, accelerating the temperature rise. The maintained state of the damper assembly 60 avoids drastic temperature changes caused by frequent switching, ensuring uniform temperature inside the refrigerator compartment 10.

[0191] The continuous operation of the refrigerating fan 12 promotes the air circulation inside the refrigerating chamber 10, accelerating the heat transfer between the hot air and the cold surface. Through forced air circulation, the heat generated by the heating component can act more efficiently on all corners of the refrigerating chamber 10, shortening the defrosting time required. The operation of the refrigerating fan 12 helps to evenly distribute the heat released by the heating component throughout the refrigerating chamber 10, avoiding excessive or too low local temperatures.

[0192] Through the introduction of the heating component and the continuous operation of the refrigerating fan 12, the refrigerator 1 can effectively compensate for the temperature drop caused by the melting of condensed water during the defrosting process, maintaining the stability of the refrigerating temperature. This design not only improves the defrosting efficiency but also enhances the temperature control ability of the refrigerating chamber 10, reflecting the intelligent and user-friendly design concept. At the same time, by maintaining the state of the air door assembly 60, the air circulation is further optimized, improving the energy efficiency and reliability of the entire system.

[0193] In some embodiments, when the freezing temperature meets the second preset shutdown condition, the second air door 602 of the air door assembly 60 is switched to disconnect the connection between the second chamber 40 and the freezer 20.

[0194] The above-mentioned second preset shutdown condition is set based on the temperature of the freezer 20 reaching a certain specific value (such as -18°C), which ensures that the temperature of the freezer 20 is always maintained within an ideal range, avoiding overcooling or insufficient refrigeration.

[0195] By switching the first air door 601 and the second air door 602 to cut off the connection between the freezer 20 and the second chamber 40, the heat exchange between the second evaporator 41 and the freezer 20 is cut off, preventing the temperature in the freezer 20 from being too low and keeping the freezer 20 within a stable temperature range to ensure the quality of frozen food.

[0196] This design not only improves the temperature control accuracy of the freezer 20 but also enhances the overall energy efficiency and reliability of the system.

[0197] Refer to Figure 11 , to illustrate the refrigeration control logic of the first evaporator 31 and the second evaporator 41 in the refrigerator 1 in the embodiments of the present application.

[0198] After the refrigerator 1 is powered on, it is determined whether the refrigerating chamber 10 and the freezer 20 have a refrigeration requirement (S101).

[0199] When the refrigerating temperature meets the first preset startup condition, it is determined that the refrigerating chamber 10 needs refrigeration at this time; when the freezing temperature meets the second preset condition, it is determined that the freezer 20 needs refrigeration at this time;

[0200] After the refrigerating chamber 10 or the freezing chamber 20 has a refrigeration requirement, determine the surface temperatures of the first evaporator 31 and the second evaporator 41 (S102).

[0201] When the first evaporation surface temperature reaches the first preset temperature, it is determined that the evaporator temperature is too high at this time, the temperature of the chamber where it is located is high, there is no frosting or very little frosting on the first evaporator 31, and it is determined that the first evaporator 31 does not need to be defrosted at this time. When the first evaporation surface temperature is less than the first preset temperature, it is determined that the first evaporator 31 needs to be defrosted.

[0202] When the second evaporation surface temperature reaches the second preset temperature, it is determined that the evaporator temperature is too high at this time, the temperature of the chamber where it is located is high, there is no frosting or very little frosting on the first evaporator 31, and it is determined that the second evaporator 41 does not need to be defrosted at this time. When the second evaporation surface temperature is less than the second preset temperature, it is determined that the second evaporator 41 needs to be defrosted.

[0203] If neither the first evaporator 31 nor the second evaporator 41 needs to be defrosted, the freezing chamber 20 needs to be refrigerated (S103).

[0204] Switch the air door assembly 60 and use the first evaporator 31 to refrigerate the freezing chamber 20 (S104).

[0205] When the freezing temperature meets the second preset shutdown condition, at this time, the first evaporator 31 stops refrigerating, and the connection between the first chamber 30 and the freezing chamber 20 is closed (S105).

[0206] When the refrigerating chamber 10 needs to be refrigerated, connect the connection between the first chamber 30 where the first evaporator 31 is located and the refrigerating chamber 10 (S106).

[0207] By connecting the first chamber 30 and the refrigerating chamber 10, the cooling capacity of the first evaporator 31 can be used for refrigeration. At the same time, if the first evaporator 31 has frosted at this time, defrosting can be performed.

[0208] In some embodiments, when the freezing temperature meets the second preset shutdown condition, if the first evaporation surface temperature reaches the second preset temperature at this time, it is determined that the defrosting of the first evaporator 31 is completed;

[0209] When the refrigerating temperature does not reach the first preset shutdown condition, switch the air door assembly 60 and the second air door 602 so that the refrigerating chamber 10 is not connected to the first chamber 30, and the refrigerating chamber 10 is connected to the second chamber 40, and use the second evaporator 41 to refrigerate the refrigerating chamber 10.

[0210] After the defrosting is completed and the refrigerating chamber 10 has not reached the shutdown temperature, use the remaining cooling capacity after the second evaporator 41 has just finished refrigerating for refrigeration, improve the utilization rate of the cooling capacity, and improve the overall energy consumption of the refrigerator 1.

[0211] In some embodiments, when the temperature of the second evaporation surface is less than the first preset temperature, it is determined that the second evaporator 41 needs defrosting at this time. The regulating valve is switched so that the refrigerant does not pass through the second evaporator 41, and the first air damper 601 and the second air damper 602 are adjusted to connect the second chamber 40 and the refrigerating chamber 10, and the air flow in the refrigerating chamber 10 is used to defrost the first evaporator 31;

[0212] During the process of defrosting the second evaporator 41 by using the air flow in the refrigerating chamber 10, when the temperature in the refrigerating chamber 10 meets the first preset startup condition, the states of the first air damper 601, the second air damper 602 and the regulating valve are maintained, and the refrigerating fan 12 is controlled to operate at the first speed.

[0213] In the embodiments of the present application, the defrosting method of the second evaporator 41 is the same as that of the first evaporator 31, which will not be elaborated here.

[0214] Refer to Figure 12 to illustrate the control logic of the heating component during the defrosting process of the evaporator in the embodiments of the present application.

[0215] After the first evaporator 31 finishes refrigerating the freezer 20, the compressor is turned off, the freezer fan 22 is turned off, and defrosting starts (S301).

[0216] The temperature of the first evaporation surface is less than the first preset temperature, the temperature of the second evaporation surface is less than the second preset temperature, the freezer temperature meets the second preset startup condition, and the refrigerating temperature does not meet the first preset startup condition (S302). At this time, when both the first evaporator 31 and the second evaporator 41 need defrosting, the freezer 20 has a refrigeration demand, and the refrigerating chamber 10 has no refrigeration demand.

[0217] The air damper assembly 60 is switched to control the connection between the refrigerating chamber 10 and the first chamber 30, the heating component is turned on, and when the refrigerating temperature meets the preset threshold, the heating component is turned off (S303).

[0218] When the first evaporator 31 is less than the first preset temperature, the temperature of the second evaporation surface is not less than the second preset temperature, the freezer temperature meets the second preset startup condition, and the refrigerating temperature meets the first preset startup condition (S304). At this time, the first evaporator 31 needs defrosting, the second evaporator 41 does not need defrosting, the freezer 20 has a refrigeration demand, and the refrigerating chamber 10 has a refrigeration demand.

[0219] The compressor is controlled to start, the second evaporator 41 is turned on to refrigerate the freezer 20, and the air flow in the refrigerating chamber 10 exchanges heat with the first evaporator 31 to realize the refrigeration of the refrigerating chamber 10 and the defrosting of the first evaporator 31 (S305).

[0220] When the temperature of the first evaporator 31 is lower than the first preset temperature, the temperature of the second evaporation surface is not lower than the second preset temperature, the freezing temperature does not meet the second preset start-up condition, and the refrigerating temperature meets the first preset start-up condition (S306). At this time, the first evaporator 31 needs defrosting, the second evaporator 41 does not need defrosting, the freezer compartment 20 has no refrigeration requirement, and the refrigerating compartment 10 has a refrigeration requirement.

[0221] Control the compressor not to start, and the air flow in the refrigerating compartment 10 exchanges heat with the first evaporator 31 to realize refrigeration of the refrigerating compartment 10 and defrosting of the first evaporator 31 (S307).

[0222] When the temperature of the first evaporator 31 is lower than the first preset temperature, the temperature of the second evaporation surface is not lower than the second preset temperature, the freezing temperature meets the second preset start-up condition, and the refrigerating temperature does not meet the first preset start-up condition (S308). At this time, the first evaporator 31 needs defrosting, the second evaporator 41 does not need defrosting, the freezer compartment 20 has a refrigeration requirement, and the refrigerating compartment 10 has no refrigeration requirement.

[0223] Control the compressor to start, turn on the second evaporator 41 to refrigerate the freezer compartment 20; turn on the heating component, and the air flow in the refrigerating compartment 10 exchanges heat with the first evaporator 31 to realize defrosting of the first evaporator 31 (S309).

[0224] When the temperature of the first evaporation surface is not lower than the first preset temperature, the temperature of the second evaporation surface is not lower than the second preset temperature, the freezing temperature does not meet the second preset start-up condition, and the refrigerating temperature does not meet the first preset start-up condition (S310). At this time, the first evaporator 31 does not need defrosting, the second evaporator 41 does not need defrosting, the freezer compartment 20 has no refrigeration requirement, and the refrigerating compartment 10 has no refrigeration requirement.

[0225] Continue to detect the temperature of the first evaporation surface, the temperature of the second evaporation surface, the refrigerating temperature, and the freezing temperature (S311).

[0226] In the refrigerator 1 according to the embodiment of the present application, through the multi-chamber design and the refrigeration system with double evaporators, the temperatures of the refrigerating compartment 10 and the freezer compartment 20 can be more stably maintained within the preset range, avoiding drastic temperature fluctuations.

[0227] Controlling the reasonable configuration of the refrigerant of the regulating valve and the two evaporators reduces the waste of the refrigerant, improves the refrigeration efficiency, and reduces the energy consumption.

[0228] Moreover, when the evaporator has a defrosting requirement, the temperature of the refrigerating compartment 10 can be lowered by using the defrosting temperature or the remaining cold quantity of the evaporator, improving the refrigeration response speed of the entire system and the overall energy efficiency of the refrigerator 1.

[0229] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0230] For the sake of explanation, the above description has been presented in connection with specific embodiments. However, the above exemplary discussions are not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Many modifications and variations are possible in light of the above teaching. The selection and description of the above embodiments are intended to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that, Comprising: Refrigerating chamber; Freezing chamber; Refrigerating blower, which is used to drive the heat exchange of the air flow in the refrigerating chamber; Refrigerating temperature detection component, which is arranged in the refrigerating chamber and is used to detect the refrigerating temperature; Refrigeration system, including a compressor, a condenser, an expansion valve and an evaporator assembly; The evaporator assembly includes: Regulating valve, whose input end is connected to the output end of the expansion valve and is used to regulate the refrigerant flow rate; First evaporator, whose input end is connected to the first output end of the regulating valve; Second evaporator, whose input end is connected to the second output end of the regulating valve; First chamber, which is arranged between the refrigerating chamber and the freezing chamber, and the first chamber is used to accommodate the first evaporator; Second chamber, which is arranged between the refrigerating chamber and the freezing chamber, and the second chamber is used to accommodate the second evaporator; Air door assembly, which is at least used to control the communication between the first chamber and the refrigerating chamber or the communication between the first chamber and the freezing chamber; Controller, configured to, when the first evaporator needs defrosting and the second evaporator does not need defrosting, switch the regulating valve so that the refrigerant does not flow through the first evaporator, switch the air door assembly so that the first chamber is communicated with the refrigerating chamber, and use the air flow in the refrigerating chamber to defrost the first evaporator; during the defrosting process using the air flow in the refrigerating chamber, when the refrigerating temperature meets the first preset startup condition, maintain the states of the air door assembly and the regulating valve, and control the refrigerating blower to operate at the first speed.

2. The refrigerator according to claim 1, characterized in that, Further comprising: First evaporation temperature detection component, arranged on the surface of the first evaporator and used to detect the first evaporation surface temperature; Second evaporation temperature detection component, arranged on the surface of the second evaporator and used to detect the second evaporation surface temperature; The controller, configured to, when the first evaporation surface temperature is less than the first preset temperature, determine that the first evaporator needs defrosting at this time, and when the second evaporation surface temperature reaches the second preset temperature, determine that the second evaporator does not need defrosting at this time.

3. The refrigerator according to claim 1, characterized in that, Further comprising: Freezing temperature detection component, which is arranged in the freezing chamber and is used to detect the freezing temperature; The air door assembly is further used to control the communication between the second chamber and the refrigerating chamber or the communication between the second chamber and the freezing chamber; The controller is configured to, during the defrosting process of the first evaporator, when the freezing temperature meets the second preset startup condition, control the compressor to operate, switch the regulating valve so that the refrigerant flows through the second evaporator, adjust the air door assembly so that the second chamber is communicated with the freezing chamber, and use the second evaporator to refrigerate the freezing chamber.

4. The refrigerator according to claim 3, characterized in that The controller is configured to, during the defrosting process using the air flow in the refrigerating chamber, when the refrigerating temperature meets the first preset shutdown condition, switch the air door assembly to cut off the communication between the first chamber and the refrigerating chamber, and control the refrigerating blower to stop.

5. The refrigerator according to claim 4, characterized in that, The controller is configured to, after controlling the refrigeration fan to stop, when the refrigeration temperature meets the first preset startup condition again, start the refrigeration fan, open the air door assembly to reconnect the first chamber and the refrigerating chamber, enable the air flow in the refrigerating chamber to exchange heat with the first evaporator, and use the temperature of the refrigerating chamber to defrost again.

6. The refrigerator according to claim 3, characterized in that, The controller is configured to, when the defrosting of the first evaporation surface temperature is completed and the refrigeration temperature does not meet the first preset shutdown condition, switch the air door assembly to connect the refrigerating chamber and the second chamber, and use the second evaporator to continue refrigerating the refrigerating chamber.

7. The refrigerator according to claim 3, wherein, The controller is configured to, when the freezer needs to be refrigerated, preferentially use the first evaporator for refrigeration; During the process of the first evaporator refrigerating the freezer, when the refrigeration temperature meets the first preset startup condition, switch the regulating valve to make the refrigerant flow through the second evaporator and not flow through the first evaporator, adjust the air door assembly to connect the refrigerating chamber and the first chamber, and use the remaining cooling capacity of the first evaporator to cool down the refrigerating chamber; Then, adjust the air door assembly to connect the freezer and the second chamber, and use the temperature of the second evaporator to continue cooling down the freezer.

8. The refrigerator according to any one of claims 1-7, characterized in that, Further comprising: a heating component disposed in the refrigerating chamber; The controller is configured to, during the defrosting process using the air flow in the refrigerating chamber, when the refrigeration temperature meets the first preset shutdown condition, maintain the state of the air door assembly, keep the refrigeration fan running, and turn on the heating component to compensate for the temperature drop of the refrigerating chamber due to defrosting.

9. The refrigerator according to claim 2, wherein, The controller is configured to, when the freezing temperature meets the second preset shutdown condition, switch the air door assembly to disconnect the connection between the second chamber and the freezer; when the first evaporation surface temperature reaches the third preset temperature, determine that the defrosting of the first evaporator is completed; When the refrigeration temperature does not reach the first preset shutdown condition, switch the air door assembly to disconnect the connection between the refrigerating chamber and the first chamber, connect the refrigerating chamber and the second chamber, and use the second evaporator to refrigerate the refrigerating chamber.

10. A refrigerator, characterized in that, Comprising: a refrigerating chamber; a freezer; a refrigeration fan for accelerating the heat exchange of the air flow in the refrigerating chamber; a refrigeration temperature detection component disposed in the refrigerating chamber for detecting the refrigeration temperature; a refrigeration system including a compressor, a condenser, an expansion valve, and an evaporator assembly; The evaporator assembly includes: a regulating valve whose input end is connected to the output end of the expansion valve for regulating the refrigerant flow rate; a first evaporator whose input end is connected to the first output end of the regulating valve; a second evaporator whose input end is connected to the second output end of the regulating valve; a first chamber disposed between the refrigerating chamber and the freezer, and the first chamber is used to accommodate the first evaporator; a second chamber disposed between the refrigerating chamber and the freezer, and the second chamber is used to accommodate the second evaporator; An air door assembly, which is used to control the communication between the first chamber and the refrigerating chamber or the communication between the first chamber and the freezing chamber, and is used to control the communication between the second chamber and the refrigerating chamber or the communication between the second chamber and the freezing chamber; When the air door assembly is in the first position, the refrigerating chamber is in communication with the first chamber, and the air flow in the refrigerating chamber exchanges heat with the first evaporator, and the refrigerating chamber is used to defrost the first evaporator; When the air door assembly is in the second position, the refrigerating chamber is in communication with the second chamber, and the air flow in the refrigerating chamber exchanges heat with the second evaporator, and the refrigerating chamber is used to defrost the second evaporator.

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