refrigerator

Abstract

This utility model provides a refrigerator, belonging to the field of refrigeration equipment technology. The evaporator is located on the back side of the first storage compartment. Considering that the heat generated by the evaporator during the defrosting process will overflow into the first storage compartment, cold storage plates are respectively installed on the top wall, bottom wall, left side wall, and right side wall of the first compartment. The cold storage plates are divided into multiple cold storage blocks. The phase change temperature of the cold storage phase change material in each cold storage block matches the temperature distribution of the first storage compartment. This ensures that the cold storage phase change material in each cold storage block is in the high-efficiency working range, improves the utilization rate of the cold storage phase change material in the cold storage plate, realizes efficient storage and release of cold energy, and improves the suppression effect of compartment temperature fluctuations.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and mainly to a refrigerator. Background Technology

[0002] A refrigerator is a container that uses a refrigerant phase change to create a low-temperature environment for storing food, and it is one of the indispensable household appliances in people's lives. As people's living standards improve, their requirements for refrigerators are also getting higher and higher.

[0003] In related air-cooled refrigerators, the refrigerator typically includes a cabinet and a refrigerator compartment and a freezer compartment located within the cabinet. The refrigerator compartment contains a refrigerator compartment, and the freezer compartment contains a freezer compartment. A refrigerator air duct assembly is located on the back of the refrigerator compartment, through which cold air is delivered to the refrigerator compartment for cooling. Similarly, a freezer air duct assembly is located on the back of the freezer compartment, through which cold air is delivered to the freezer compartment for cooling.

[0004] Currently, in existing frost-free refrigerators, the evaporator and freezer air duct assembly are typically installed at the back of the freezer compartment, with the evaporator located on the back side of the freezer air duct assembly. When the evaporator is operating, its surface temperature is low, causing free water molecules in the air to condense on it. Over time, this condensation forms frost, affecting cooling efficiency and requiring periodic defrosting. During defrosting, a significant amount of heat escapes into the freezer compartment, drastically increasing the freezer temperature. This is detrimental to food preservation and also increases energy consumption during defrosting and subsequent cooling cycles. Utility Model Content

[0005] The purpose of this invention is to provide a refrigerator in which cold storage plates are respectively installed on the top wall, bottom wall, left side wall and right side wall of the first compartment (i.e. the compartment where the evaporator is located), and the cold storage plates are divided into multiple cold storage blocks. The phase change temperature of the cold storage phase change material in each cold storage block is matched with the temperature distribution of the first storage compartment, which can improve the utilization rate of the cold storage phase change material in the cold storage plate, realize the efficient storage and release of cold energy, and improve the suppression effect of compartment temperature fluctuation.

[0006] To achieve the above objectives, this application provides a refrigerator, comprising:

[0007] The cabinet, which forms the outer shell of the refrigerator;

[0008] The first and second inner boxes are arranged adjacent to each other in the box, with the first inner box located above the top of the second inner box; a first storage chamber is formed inside the first inner box, and a second storage chamber is formed inside the second inner box.

[0009] The first air duct assembly is disposed inside the first box and on the back side of the first storage compartment, and a first air supply duct is formed inside the first air duct assembly.

[0010] The second air duct assembly is located inside the second box and on the back side of the second storage compartment, and a second air supply duct is formed inside the second air duct assembly.

[0011] The first inner box has an evaporation chamber formed on its back. The evaporation chamber is located on the back side of the first storage room and has an evaporator inside.

[0012] The first air supply duct and the second air supply duct are respectively connected to the evaporation chamber;

[0013] The top wall, bottom wall, left side wall and right side wall of the first chamber are respectively provided with cold storage plates with cavities, and the cavities of the cold storage plates are filled with cold storage phase change material.

[0014] The cavity of the cold storage plate is provided with at least one partition to divide the cold storage plate into at least two cold storage blocks. The phase change temperature of the cold storage phase change material in each cold storage block matches the temperature distribution of the first storage chamber. The higher the temperature of the cold storage block in the region of the first storage chamber, the higher the phase change temperature of the cold storage phase change material in the cold storage block.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] In this embodiment, the evaporator is located on the back side of the first storage chamber. Considering that the heat generated by the evaporator during the defrosting process will overflow into the first storage chamber, a cold storage plate is provided on the top wall, bottom wall, left side wall, and right side wall of the first chamber. The cold storage plate is divided into multiple cold storage blocks. The phase change temperature of the cold storage phase change material in each cold storage block matches the temperature distribution of the first storage chamber. This ensures that the cold storage phase change material in each cold storage block is in the high-efficiency working range, improves the utilization rate of the cold storage phase change material in the cold storage plate, realizes the efficient storage and release of cold energy, and improves the suppression effect of temperature fluctuation in the chamber.

[0017] In some embodiments of this application, the cavity of the cold storage plate is provided with two partitions to divide the cold storage plate into a first cold storage block, a second cold storage block, and a third cold storage block. The first cold storage block, the second cold storage block, and the third cold storage block are arranged sequentially from the back side of the first storage chamber to the front side of the first storage chamber. The phase change temperature corresponding to the cold storage phase change material in the first cold storage block is lower than the phase change temperature corresponding to the cold storage phase change material in the second cold storage block, and the phase change temperature corresponding to the cold storage phase change material in the second cold storage block is lower than the phase change temperature corresponding to the cold storage phase change material in the third cold storage block.

[0018] The above technical solution has the following advantages or beneficial effects:

[0019] In this embodiment, considering the natural temperature gradient inside the refrigerator (e.g., the lowest temperature near the evaporator, moderate temperature in the middle area, and highest temperature at the door), the cold storage plate can be configured as three cold storage blocks: a first cold storage block, a second cold storage block, and a third cold storage block. These blocks are arranged sequentially from the back of the first storage compartment to the front, with the first cold storage block closer to the back (i.e., near the evaporator), the second cold storage block located in the middle area of ​​the first storage compartment, and the third cold storage block closer to the front (i.e., near the door). By setting the phase change temperatures of the cold storage phase change materials within the first, second, and third cold storage blocks to decrease sequentially, the utilization rate of the cold storage phase change materials in the cold storage plate can be improved, achieving efficient storage and release of cold energy and enhancing the suppression of temperature fluctuations in the compartment.

[0020] In some embodiments of this application, a flexible heat-conducting layer is provided between the top wall, bottom wall, left side wall and right side wall of the first box and the corresponding cold storage plate.

[0021] The above technical solution has the following advantages or beneficial effects:

[0022] In this embodiment of the application, considering that the cold storage phase change material will undergo volume change during the phase change process, flexible heat-conducting layers are respectively provided between the top wall, bottom wall, left side wall and right side wall of the first chamber and the corresponding cold storage plate. The deformation can be compensated by elastic deformation to maintain close contact, which can ensure the efficient storage and release of cold energy of the cold storage plate.

[0023] In some embodiments of this application, the cold storage blocks of the cold storage plate are connected by heat pipes so that heat can be transferred between the cold storage blocks.

[0024] The above technical solution has the following advantages or beneficial effects:

[0025] In this embodiment, considering that the temperature is lower in the area near the evaporator and higher in the area away from the evaporator during the refrigeration process, connecting each cold storage block with heat pipes allows the cooling energy generated by the evaporator to be evenly distributed to each cold storage block, enabling each cold storage block to effectively store cooling energy. During the defrosting process, the temperature is higher in the area near the evaporator and lower in the area away from the evaporator. Connecting each cold storage block with heat pipes allows the heat generated during defrosting to be quickly transferred to the cold storage blocks away from the evaporator, preventing overheating in the area near the evaporator. At the same time, it encourages the cooling energy of the cold storage blocks in low-temperature areas (such as near the door) to compensate for the high-temperature areas. In this way, the temperature of each cold storage block can be balanced, and the cooling energy can be allocated on demand.

[0026] In some embodiments of this application, the heat pipe is disposed on the first air duct assembly and extends to each cold storage plate to connect the cold storage plates. The heat pipe is arranged in a serpentine spiral on the first air duct assembly and on each cold storage plate.

[0027] The above technical solution has the following advantages or beneficial effects:

[0028] In this embodiment, heat pipes are disposed in the first air duct assembly and extend to each cold storage plate. This effectively and rapidly transfers the cold energy generated by the evaporator during the refrigeration process to each cold storage plate, allowing each cold storage plate to quickly store the cold energy. Simultaneously, it also effectively and rapidly transfers the heat generated during the defrosting process to each cold storage plate, allowing each cold storage plate to quickly release the cold energy. The heat pipes are arranged in a serpentine spiral pattern, which increases the contact area and extends the pipeline, improving the thermal conductivity between the heat pipes and the cold storage plates, thereby increasing the efficiency of cold or heat transfer.

[0029] In some embodiments of this application, a first air outlet is provided at the top of the first air supply duct, the first air outlet connects the first storage chamber and the evaporation chamber, and a first damper is provided at the first air outlet, the first damper being able to adjust the opening degree of the first air outlet.

[0030] The above technical solution has the following advantages or beneficial effects:

[0031] In this embodiment of the application, a first damper is provided at the first air outlet. During the defrosting process, the first air outlet can be closed by closing the first damper, thereby preventing the hot air generated during the defrosting process from flowing into the first storage room through the first air outlet, which can reduce the temperature rise of the first storage room to a certain extent.

[0032] In some embodiments of this application, a first return air duct is provided between the first chamber and the second chamber. The first return air duct is arranged at the front end of the bottom of the evaporation chamber. The top end of the first return air duct is connected to the front end area of ​​the bottom of the evaporation chamber. The bottom end of the first return air duct is connected to the second storage chamber. A second damper is provided at the top end of the first return air duct. The second damper can adjust the opening degree of the first return air duct.

[0033] The above technical solution has the following advantages or beneficial effects:

[0034] In this embodiment of the application, a second damper is provided at the top of the first return air duct. During the defrosting process, the first return air duct can be closed by closing the second damper, thereby preventing the hot air generated during the defrosting process from flowing into the second storage room through the first return air duct, which can reduce the temperature rise of the second storage room to a certain extent.

[0035] In some embodiments of this application, a second return air duct is provided between the first chamber and the second chamber. The second return air duct is arranged at the rear end of the bottom of the evaporation chamber. The top end of the second return air duct is connected to the rear end area of ​​the bottom of the evaporation chamber, and the bottom end of the second return air duct is connected to the second storage chamber. A third damper is provided at the top end of the second return air duct, and the third damper can adjust the opening degree of the second return air duct.

[0036] The above technical solution has the following advantages or beneficial effects:

[0037] In this embodiment of the application, a third damper is provided at the top of the second return air duct. During the defrosting process, the second return air duct can be closed by closing the third damper, thereby preventing the hot air generated during the defrosting process from flowing into the second storage room through the second return air duct, which can reduce the temperature rise of the second storage room to a certain extent.

[0038] In some embodiments of this application, the third damper is provided with multiple through holes.

[0039] The above technical solution has the following advantages or beneficial effects:

[0040] In this embodiment of the application, considering that condensate and humid hot air will inevitably be generated during the defrosting process, the third air damper is provided with multiple through holes, so that condensate and humid hot air can enter the second storage room through the through holes, which can play a certain role in humidifying the second storage room.

[0041] In some embodiments of this application, the first inner box is a freezer inner box, and the second inner box is a refrigerator inner box; the first storage compartment is a freezer compartment, and the second storage compartment is a refrigerator compartment.

[0042] The above technical solution has the following advantages or beneficial effects:

[0043] In this embodiment, considering that the evaporator generates heat during defrosting, this heat can easily affect the temperature of the first storage compartment, causing temperature fluctuations. If the first storage compartment is a refrigerator, its temperature is already relatively high (compared to the freezer), which can easily lead to excessively high temperatures and affect the preservation of food. If the first storage compartment is a freezer and the second storage compartment is a refrigerator, the freezer itself is very cold. Even if the heat generated by the evaporator defrosting causes temperature fluctuations, these fluctuations will not significantly affect the low-temperature state of the freezer (even if the temperature rises slightly, the freezer will still maintain a low temperature), thus not affecting the preservation of food. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of a refrigerator according to an embodiment of the present invention.

[0045] Figure 2 yes Figure 1 Internal structural diagram.

[0046] Figure 3 yes Figure 2 A structural diagram from another perspective.

[0047] Figure 4 yes Figure 2 A structural diagram from another perspective.

[0048] Figure 5 This is a schematic diagram of the structure of the third damper according to an embodiment of the present invention.

[0049] Figure 6 This is a schematic diagram of the structure of the first inner tank of an embodiment of the present invention.

[0050] Figure 7 This is a schematic diagram of the structure of a cold storage plate according to an embodiment of the present invention.

[0051] Figure 8 This is a schematic diagram of the installation structure of a cold storage plate according to an embodiment of the present invention.

[0052] The correspondence between the reference numerals and the component names is as follows:

[0053] 1. Cabinet body; 2. First cabinet liner; 3. Second cabinet liner; 20. First storage compartment; 30. Second storage compartment; 11. First door; 12. Second door; 13. Evaporator; 21. Evaporation chamber; 14. First air outlet; 15. Third air damper; 41. Second air supply duct; 5. First return air duct; 6. Second return air duct; 7. Cold storage plate; 71. First cold storage block; 72. Second cold storage block; 73. Third cold storage block; 8. Heat pipe. Detailed Implementation

[0054] This utility model provides a refrigerator. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.

[0055] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0056] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] In existing frost-free refrigerators, the evaporator and freezer air duct assembly are typically installed at the back of the freezer compartment, with the evaporator located on the back side of the freezer air duct assembly. When the evaporator is operating, its surface temperature is low, causing free water molecules in the air to condense on it. Over time, this condensation forms frost, affecting cooling efficiency and requiring periodic defrosting. During defrosting, a significant amount of heat escapes into the freezer compartment, drastically increasing the freezer temperature. This is detrimental to food preservation and also increases energy consumption during defrosting and subsequent cooling cycles.

[0058] Based on this, this application provides a refrigerator, which aims to install cold storage plates on the top wall, bottom wall, left side wall and right side wall of the first compartment (i.e. the compartment where the evaporator is located), and the cold storage plates are divided into multiple cold storage blocks. The phase change temperature of the cold storage phase change material in each cold storage block is matched with the temperature distribution of the first storage compartment, which can improve the utilization rate of the cold storage phase change material in the cold storage plate, realize the efficient storage and release of cold energy, and improve the suppression effect of compartment temperature fluctuation.

[0059] Figure 1 This is a schematic diagram of the structure of a refrigerator according to an embodiment of the present invention. Figure 2 yes Figure 1 Internal structural diagram. Figure 3 yes Figure 2 A structural diagram from another perspective. Figure 4 yes Figure 2 A structural diagram from another perspective.

[0060] Please see Figures 1 to 4 As shown, the refrigerator of this utility model embodiment mainly includes a cabinet 1 and a refrigeration system disposed in the cabinet 1.

[0061] The cabinet 1 can be a hollow cuboid structure. The cabinet 1 is constructed as the outer shell of the refrigerator. It should be noted that in other embodiments, the shape of the cabinet 1 can be designed according to requirements, and other hollow shell structures can also be used.

[0062] The interior of the cabinet 1 can be divided into multiple separate storage compartments, each of which can serve as an independent storage space to meet different refrigeration needs such as freezing, refrigeration, and variable temperature storage according to the different types of food.

[0063] The front of the refrigerator body 1 may be equipped with a door for opening and closing the storage compartments. The door is connected to the refrigerator body 1 via a hinge, allowing the door to rotate around the hinge axis, thus opening and closing the refrigerator door and consequently the corresponding storage compartment. It is understood that multiple doors can be provided, each corresponding to a storage compartment. Alternatively, multiple doors can open and close a single storage compartment simultaneously.

[0064] The container 1 may contain a liner, and storage rooms are formed within the liner. It is understood that multiple liners may be installed inside the container 1, and each liner may form one or more storage rooms.

[0065] Please see Figures 1 to 4 As shown, in some embodiments, the box body 1 has a first inner box 2 and a second inner box 3 arranged vertically adjacent to each other. The first inner box 2 forms a first storage chamber 20, and the second inner box 3 forms a second storage chamber 30. The first inner box 2 is located above the top of the second inner box 3, that is, the first storage chambers 20 are arranged at intervals above the top of the second storage chambers 30.

[0066] In some embodiments, the first inner container 2 can be a freezer inner container, and the first storage compartment 20 can be a freezer compartment. The second inner container 3 can be a refrigerator inner container, and the second storage compartment 30 can be a refrigerator compartment.

[0067] Please see Figures 1 to 4 As shown, in some embodiments, the cabinet door may include a first cabinet door 11 and a second cabinet door 12. The first cabinet door 11 and the second cabinet door 12 are respectively disposed on the front side of the cabinet body 1. The first cabinet door 11 is arranged corresponding to the first cabinet liner 2 and the first storage compartment 20, and the second cabinet door 12 is arranged corresponding to the second cabinet liner 3 and the refrigerator compartment. The first cabinet door 11 is used to open and close the first cabinet liner 2 and the first storage compartment 20, and the second cabinet door 12 is used to open and close the second cabinet liner 3 and the second storage compartment 30.

[0068] In some embodiments, a refrigeration system may be provided inside the cabinet 1. The refrigeration system is used to provide cold air to the inside of the refrigerator to maintain a low-temperature environment in each storage compartment. The refrigeration system includes a compressor, a condenser (not shown in the figure), an evaporator 13, and a capillary tube (not shown in the figure). The compressor, condenser, capillary tube, and evaporator 13 are connected in sequence to form a refrigeration circuit. The refrigerant circulates within the refrigeration circuit to achieve cooling of the inside of the cabinet 1.

[0069] Please see Figures 1 to 4As shown, in some embodiments, the housing 1 may contain a compressor compartment, in which the compressor and condenser are installed. The compressor compartment is located on the back side of the bottom of the second housing liner 3. A cooling fan (not shown in the figure) is provided inside the compressor compartment to provide airflow, which cools the compressor.

[0070] Please see Figures 2 to 4 As shown, in some embodiments, the housing 1 may contain an evaporation chamber 21, and an evaporator 13 is arranged inside the evaporation chamber 21. The evaporator 13 is used to cool the evaporation chamber 21, so that a large amount of cold air is formed inside the evaporation chamber 21.

[0071] In some embodiments, the evaporation chamber 21 may be located in the back area of ​​the first storage chamber 2, that is, the evaporation chamber 21 is located on the back side of the first storage chamber 20. The evaporation chamber 21 and the first storage chamber 20 are separated from each other.

[0072] In some embodiments, the evaporation chamber 21 and the first storage chamber 20 can be separated by a heat insulation plate, thereby preventing the evaporation chamber 21 from affecting the temperature inside the first storage chamber 20.

[0073] In some embodiments, the first storage compartment 20 can be configured as a freezer compartment, thereby reducing the influence of the evaporator compartment 21 on the temperature inside the first storage compartment 20. It should be noted that in other embodiments, the first storage compartment 20 can also be configured as a refrigerator compartment or other storage compartments.

[0074] Please see Figures 2 to 4 As shown, in some embodiments, a first air duct assembly (not shown) may be provided on the rear wall inside the first storage chamber 2. The first air duct assembly is arranged vertically and is located on the back side of the first storage chamber 20. A first air supply duct is formed within the first air duct assembly, and the first air supply duct connects to the first storage chamber 20. At the same time, the bottom end of the first air supply duct connects to the evaporation chamber 21, thereby allowing the cold air in the evaporation chamber 21 to be transported into the first storage chamber 20 through the first air supply duct, thus achieving cooling of the first storage chamber 20.

[0075] In some embodiments, a first air outlet 14 is provided on the front wall of the first air duct assembly, and the first air outlet 14 connects the first air duct and the first storage chamber 20. Therefore, the cold air in the evaporation chamber 21 can enter the first storage chamber 20 through the first air duct and the first air outlet 14 in sequence, thereby achieving cooling in the first storage chamber 20.

[0076] Please see Figures 2 to 4As shown, in some embodiments, a second air duct assembly (not shown) may be provided on the rear wall inside the second chamber 3. The second air duct assembly is arranged vertically and is located on the back side of the second storage chamber 30. A second air supply duct 41 is formed within the second air duct assembly, and the second air supply duct 41 connects to the second storage chamber 30. At the same time, the top end of the second air supply duct 41 connects to the bottom front end area of ​​the evaporator chamber 21, thereby allowing the cold air in the evaporator chamber 21 to be transported into the second storage chamber 30 through the second air supply duct 41, thereby achieving cooling of the second storage chamber 30.

[0077] In some embodiments, a first return air duct 5 may be provided between the bottom of the first chamber 2 and the top of the second chamber 3. The first return air duct 5 is arranged at the front end of the bottom of the evaporation chamber 21, the top end of the first return air duct 5 is connected to the front end area of ​​the bottom of the evaporation chamber 21, and the bottom end of the first return air duct 5 is connected to the second storage chamber.

[0078] In some embodiments, the top end of the second air supply duct 41 is connected to the bottom end of the first return air duct 5, and the top end of the second air supply duct 41 is connected to the bottom front end of the evaporation chamber 21 through the first return air duct 5.

[0079] In some embodiments, a second air outlet (not shown in the figure) may be provided on the front wall of the second air duct assembly. One or more second air outlets may be provided, arranged vertically or horizontally at intervals. The second air outlet connects to the second air duct 41 and the second storage chamber 30. Therefore, the cold air in the evaporator 21 can sequentially enter the second storage chamber 30 through the second air duct 41 and the second air outlet, thereby achieving cooling within the second storage chamber 30.

[0080] Please see Figures 2 to 4 As shown, in some embodiments, a fan compartment (not shown in the figure) may be formed inside the evaporation chamber 21. The fan compartment contains a blower (not shown in the figure) to provide airflow. The fan compartment is connected to the evaporation chamber 21, and the bottom end of the first air duct and the top end of the second air duct 41 are respectively connected to the fan compartment. When the blower is running, the fan blades rotate to generate airflow, which in turn generates airflow. The airflow from the blower can draw cold air from the evaporation chamber 21 and deliver the cold air to the first and second air ducts 41, respectively, and then deliver cold air to the first storage chamber 20 and the second storage chamber 30, respectively, thereby achieving cooling in the first storage chamber 20 and the second storage chamber 30.

[0081] In some embodiments, the air supply fan can be a centrifugal fan, such as an ultra-thin centrifugal fan, which can increase the usable volume. It should be noted that in other embodiments, the air supply fan can also be a cross-flow fan.

[0082] In some embodiments, a first damper (not shown in the figure) may be provided at the connection between the bottom end of the first air supply duct and the fan compartment. The first damper can open and close the first air supply duct. When the fan is running and the first damper opens the first air supply duct, the cold air in the evaporation chamber 21 can sequentially enter the first storage chamber 20 through the evaporation chamber 21, the first air supply duct, and the first air outlet 14, thereby achieving cooling in the first storage chamber 20. When the first damper closes the first air supply duct, cooling in the first storage chamber 20 stops. It should be noted that in other embodiments, the first damper may also be arranged at other locations in the first air supply duct.

[0083] In some embodiments, a first damper may be disposed at a first air outlet 14, and the first damper can adjust the opening degree of the first air outlet 14. Specifically, during the cooling process, the first damper is open, and the cooling energy generated by the evaporator 13 can enter the first storage chamber 20 through the first air outlet 14 to achieve cooling in the first storage chamber 20. During the defrosting process, the first damper is closed, and the heat generated by the evaporator 13 will not enter the first storage chamber 20 through the first air outlet 14, which can reduce the temperature rise in the first storage chamber 20 to a certain extent.

[0084] In some embodiments, a second damper (not shown in the figure) may be provided at the connection between the top of the second air supply duct 41 and the fan compartment. The second damper can open and close the second air supply duct 41. When the fan is running and the second damper opens the second air supply duct 41, the cold air in the evaporation chamber 21 can sequentially enter the second storage chamber 30 through the evaporation chamber 21, the second air supply duct 41, and the second air outlet, thereby achieving cooling in the second storage chamber 30. When the second damper closes the second air supply duct 41, cooling in the second storage chamber 30 stops. It should be noted that in other embodiments, the second damper may also be arranged at other locations on the second air supply duct 41.

[0085] In some embodiments, a second damper may be located at the top of the first return air duct 5, and the second damper can adjust the opening degree of the first return air duct 5. Specifically, during the cooling process, the second damper is open, and the cooling energy generated by the evaporator 13 can enter the second supply air duct 41 through the first return air duct 5 and then enter the second storage room 30, thereby achieving cooling in the second storage room 30. During the defrosting process, the second damper is closed, and the heat generated by the evaporator 13 will not enter the second storage room 30 through the first return air duct 5, which can reduce the temperature rise in the second storage room 30 to a certain extent.

[0086] In some embodiments, a return air vent is provided at the lower back of the first chamber 2. When the cold air in the evaporation chamber 21 is delivered into the first storage chamber 20 through the first air supply duct and the first air supply vent 14, the air in the first storage chamber 20 can return to the evaporation chamber 21 through the return air vent, come into contact with the evaporator 13 to re-form cold air, and thus form a cooling air circulation in the first storage chamber 20.

[0087] Please see Figure 4 As shown, in some embodiments, a second return air duct 6 is provided between the bottom of the first chamber 2 and the top of the second chamber 3. The second return air duct 6 is arranged at the rear end of the bottom of the evaporation chamber 21, the top end of the second return air duct 6 connects to the rear end area of ​​the bottom of the evaporation chamber 21, and the bottom end of the second return air duct 6 connects to the second storage chamber 30. Therefore, when the cold air in the evaporation chamber 21 or the cold air flowing out of the first storage chamber 20 is transported into the second storage chamber 30 through the second air supply duct 41, the air in the second storage chamber 30 can return to the evaporation chamber 21 through the second return air duct 6, contact the evaporator 13 to re-form cold air, and thus form a cooling air circulation in the second storage chamber 30.

[0088] In some embodiments, when the cold air in the evaporation chamber 21 is delivered into the first storage chamber 20 through the first air supply duct and the first air outlet 14, the air in the first storage chamber 20 can return to the first return air duct 5 through the return air outlet, and then enter the second storage chamber 30 through the second air supply duct 41. The air in the second storage chamber 30 can return to the evaporation chamber 21 through the second return air duct 6, and come into contact with the evaporator 13 to re-form cold air, thereby forming a cooling air circulation between the first storage chamber 20 and the second storage chamber 30.

[0089] In some embodiments, a third damper may be provided at the top of the second return air duct 6, which can adjust the opening of the second return air duct 6. Specifically, during the cooling process, the third damper is open, and the cold air generated by the evaporator 13 can enter the second supply air duct 41 through the first return air duct 5 and then enter the second storage chamber 30, and then return to the evaporation chamber 21 through the second return air duct 6, contacting the evaporator 13 again to re-form cold air, thus achieving cooling in the second storage chamber 30. During the defrosting process, the third damper is closed, and the heat generated by the evaporator 13 will not enter the second storage chamber 30 through the second return air duct 6, which can reduce the temperature rise in the second storage chamber 30 to a certain extent.

[0090] In some embodiments, refer to Figure 5 , Figure 5This is a schematic diagram of the structure of the third damper according to an embodiment of the present invention. Considering that condensate and humid hot air will inevitably be generated during the defrosting process, the third damper 15 is provided with multiple through holes, so that condensate and humid hot air can enter the second storage chamber 30 through the through holes, which can play a certain role in humidifying the second storage chamber 30.

[0091] In some embodiments, a first damper is located at the first air outlet 14, a second damper is located at the top of the first return air duct 5, and a third damper is located at the top of the second return air duct 6. During the cooling process, the first air outlet and the third damper are opened, and the opening degree of the first return air duct 5 is adjusted by adjusting the second damper, thereby regulating the temperature of the second storage room 30.

[0092] In some embodiments, the second return air duct 6 can extend in a long strip shape and can be arranged laterally along the left and right directions of the housing 1, thereby forming a wide air duct structure, which can improve the return air efficiency of the second storage room 30.

[0093] In some embodiments, refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of the first chamber liner according to an embodiment of the present invention. The top wall, bottom wall, left side wall, and right side wall of the first chamber liner 2 are each provided with a cold storage plate 7 with a cavity. The cold storage plate 7 is installed on the four surfaces of the first chamber liner 2 via clips. The cold storage plate 7 covers all surfaces of the first chamber liner 2 as completely as possible. The cavity of the cold storage plate 7 is filled with a cold storage phase change material. The cold storage phase change material can be a solid-liquid phase change material or a solid-solid phase change material. The cold storage phase change material can be an inorganic or organic material, such as a hydrated salt phase change material, a fatty acid / ester material, or a paraffin-based material.

[0094] During the defrosting process, the cold storage plate 7 attached to the first chamber 2 provides cooling as the temperature of the first storage chamber 20 rises, thereby reducing the temperature fluctuation of the first storage chamber 20 during defrosting by utilizing the latent heat in the phase change process.

[0095] In some embodiments, at least one partition is provided in the cavity of the cold storage plate 7 to divide the cold storage plate 7 into at least two cold storage blocks. The phase change temperature of the cold storage phase change material in each cold storage block matches the temperature distribution of the first storage chamber 20. The higher the temperature of the cold storage block in the region of the first storage chamber 20, the higher the phase change temperature of the cold storage phase change material in the cold storage block.

[0096] In this embodiment, considering the natural temperature gradient of the first storage chamber 20, during the refrigeration process, the temperature is lowest in the area near the evaporator, where the cold source is concentrated; the temperature is moderate in the middle area; and the temperature is highest near the door (due to frequent door openings, it is most affected by ambient temperature). Based on this characteristic, the cold storage plate 7 can be divided into multiple cold storage blocks according to the temperature distribution of the first storage chamber 20. The phase change temperature of the cold storage phase change material in the cold storage block near the evaporator is the lowest, and the phase change temperature of the cold storage phase change material in the cold storage block near the door is the highest.

[0097] In this embodiment, considering that if the cold storage plate 7 is not designed in sections, meaning the entire cold storage plate 7 contains a single cold storage phase change material (with a unique phase change temperature), and if the phase change temperature of the single cold storage phase change material is too high, it cannot solidify and store cold in the low-temperature zone; if the temperature is too low, it cannot melt and release cold in the high-temperature zone. If the entire cold storage plate 7 uses a cold storage phase change material with a phase change temperature of -25°C, the cold storage phase change material in the door area may remain solid for a long time due to insufficient temperature, failing to play a temperature-regulating role. This application divides the cold storage plate 7 into multiple cold storage blocks, and the phase change temperature of the cold storage phase change material in each cold storage block matches the temperature distribution of the first storage chamber. This ensures that the cold storage phase change material in each cold storage block is in the high-efficiency working range, improving the utilization rate of the cold storage phase change material in the cold storage plate 7, achieving efficient storage and release of cold energy, and improving the suppression effect of temperature fluctuations in the chamber.

[0098] In some embodiments, refer to Figure 7 , Figure 7 This is a schematic diagram of the structure of a cold storage plate according to an embodiment of the present invention. Two partitions (not shown in the figure) are provided inside the cavity of the cold storage plate 7 to divide the cold storage plate 7 into a first cold storage block 71, a second cold storage block 72, and a third cold storage block 73. The first cold storage block 71, the second cold storage block 72, and the third cold storage block 73 are arranged sequentially from the back side of the first storage chamber 20 to the front side of the first storage chamber 20. The phase change temperature corresponding to the cold storage phase change material in the first cold storage block 71 is lower than the phase change temperature corresponding to the cold storage phase change material in the second cold storage block 72, and the phase change temperature corresponding to the cold storage phase change material in the second cold storage block 72 is lower than the phase change temperature corresponding to the cold storage phase change material in the third cold storage block 73.

[0099] For example, the phase change temperature of the phase change material in the first cold storage block 71 can be -25°C. Located in the low-temperature zone near the evaporator, the first cold storage block 71 preferentially absorbs and solidifies cold energy, rapidly storing it. The phase change temperature of the phase change material in the second cold storage block 72 can be -20°C. When the temperature fluctuates in the middle of the first storage chamber 20 (e.g., -18°C to -20°C), the phase change is initiated, buffering the temperature change. The phase change temperature of the phase change material in the third cold storage block 73 can be -15°C. It melts and absorbs heat in the high-temperature zone of the door (rising to above -12°C when the door is opened), suppressing local temperature rise. Each cold storage block completes its phase change within a matched temperature zone, reducing incomplete phase change, phase separation, or performance degradation caused by temperature mismatch.

[0100] During defrosting, the first cold storage block 71 near the evaporator absorbs the heat released by the high-temperature refrigerant at the beginning of defrosting, delaying the sudden rise in evaporator temperature and preventing defrosting heat from directly impacting the compartment. The second cold storage block 72 in the intermediate transition layer absorbs heat after the phase change material stored in the first cold storage block 71 partially melts, extending the overall temperature control time window. The third cold storage block 73 on the door side acts as a last line of defense, suppressing the temperature rebound in the door area caused by heat conduction at the end of defrosting and maintaining temperature stability in areas where users frequently access items. This forms a stepped thermal barrier, allowing defrosting heat to be consumed gradually, reducing compartment temperature fluctuations by more than 50%.

[0101] This application's embodiments utilize the phase change points (-25℃ / -20℃ / -15℃) of cold storage blocks at different locations to match the natural temperature gradient of the compartment (coldest near the evaporator, highest near the door), allowing each cold storage block in each area to preferentially undergo phase change and store cold at its corresponding temperature. This avoids the problems of "some areas being overcooled and wasted" or "some areas unable to undergo phase change" caused by a single phase change point. During the refrigeration stage (such as when the compressor is continuously operating), the temperature field distribution of the compartment is relatively fixed. Each cold storage block, distributed according to the temperature gradient, can efficiently absorb / release cold energy in its respective area, maximizing the utilization rate of the cold storage phase change material in the cold storage plate.

[0102] In some embodiments, flexible thermally conductive layers are respectively provided between the top wall, bottom wall, left side wall, and right side wall of the first chamber 2 and the corresponding cold storage plate 7. The flexible thermally conductive layers can be thermally conductive silicone grease or flexible thermally conductive pads. Considering that the cold storage phase change material will undergo volume changes during the phase change process, the flexible thermally conductive layers are respectively provided between the top wall, bottom wall, left side wall, and right side wall of the first chamber 2 and the corresponding cold storage plate 7. This allows for deformation compensation through elastic deformation, maintaining close contact and ensuring efficient storage and release of cold energy by the cold storage plate 7.

[0103] In some embodiments, the individual cold storage blocks of the cold storage plate 7 are connected by heat pipes to enable heat transfer between them. The heat pipes can be arranged in a serpentine spiral pattern on the cold storage plate. The heat pipes can transfer the cold energy from the low-temperature cold storage blocks to the high-temperature cold storage blocks, preventing localized overheating and failure of the cold storage blocks, and extending the effective operating time of the overall cold storage plate 7.

[0104] During defrosting, the heat pipes quickly transfer excess heat from the evaporator side to the cold storage blocks on the door side, preventing overheating in the area near the evaporator. Simultaneously, they encourage the cooling capacity of the low-temperature area to compensate for the high-temperature area, reducing the temperature difference between the rooms. After defrosting, the heat pipes can utilize the cooling capacity generated by the evaporator to evenly distribute the cold energy to each cold storage block, promoting synchronous condensation and regeneration across the blocks, thus shortening the preparation time for the next use of cold storage.

[0105] In some embodiments, refer to Figure 8 , Figure 8 This is a schematic diagram of the installation structure of a cold storage plate according to an embodiment of the present invention. The top wall, bottom wall, left side wall, and right side wall of the first chamber 2 can each be provided with a cold storage plate 7 with a cavity. Heat-conducting pipes 8 are disposed on the first air duct assembly and extend to each cold storage plate 7 to connect them. The heat-conducting pipes 8 are arranged in a serpentine spiral pattern on the first air duct assembly and on each cold storage plate 7.

[0106] In this embodiment, the heat pipe 8 is disposed in the first air duct assembly and extends to each cold storage plate 7, which can effectively and quickly transfer the cold energy generated by the evaporator during the refrigeration process to each cold storage plate 7, allowing each cold storage plate 7 to quickly store the cold energy. At the same time, it can also effectively and quickly transfer the heat generated during the defrosting process to each cold storage plate 7, allowing each cold storage plate 7 to quickly release the cold energy, thereby suppressing temperature fluctuations in the compartment. The heat pipe 8 is arranged in a serpentine spiral shape, which can increase the contact area and extend the pipeline, improve the thermal conductivity between the heat pipe 8 and the cold storage plate 7, thereby improving the efficiency of cold or heat transfer.

[0107] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A refrigerator, characterized in that, include: The cabinet, which forms the outer shell of the refrigerator; The first and second inner boxes are arranged adjacent to each other in the box, with the first inner box located above the top of the second inner box; a first storage chamber is formed inside the first inner box, and a second storage chamber is formed inside the second inner box. The first air duct assembly is disposed inside the first box and on the back side of the first storage compartment, and a first air supply duct is formed inside the first air duct assembly. The second air duct assembly is located inside the second box and on the back side of the second storage compartment, and a second air supply duct is formed inside the second air duct assembly. The first inner box has an evaporation chamber formed on its back. The evaporation chamber is located on the back side of the first storage room and has an evaporator inside. The first air supply duct and the second air supply duct are respectively connected to the evaporation chamber; The top wall, bottom wall, left side wall and right side wall of the first chamber are respectively provided with cold storage plates with cavities, and the cavities of the cold storage plates are filled with cold storage phase change material. The cavity of the cold storage plate is provided with at least one partition to divide the cold storage plate into at least two cold storage blocks. The phase change temperature of the cold storage phase change material in each cold storage block matches the temperature distribution of the first storage chamber. The higher the temperature of the cold storage block in the region of the first storage chamber, the higher the phase change temperature of the cold storage phase change material in the cold storage block.

2. The refrigerator according to claim 1, characterized in that, The cavity of the cold storage plate is provided with two partitions to divide the cold storage plate into a first cold storage block, a second cold storage block, and a third cold storage block. The first cold storage block, the second cold storage block, and the third cold storage block are arranged sequentially from the back side of the first storage chamber to the front side of the first storage chamber. The phase change temperature of the cold storage phase change material in the first cold storage block is lower than the phase change temperature of the cold storage phase change material in the second cold storage block, and the phase change temperature of the cold storage phase change material in the second cold storage block is lower than the phase change temperature of the cold storage phase change material in the third cold storage block.

3. The refrigerator according to claim 1, characterized in that, Flexible heat-conducting layers are respectively provided between the top wall, bottom wall, left side wall and right side wall of the first chamber and the corresponding cold storage plate.

4. The refrigerator according to claim 1, characterized in that, The cold storage blocks of the cold storage plate are connected by heat pipes so that heat can be transferred between them.

5. The refrigerator according to claim 4, characterized in that, The heat pipe is disposed on the first air duct assembly and extends to each cold storage plate to connect the cold storage plates. The heat pipe is arranged in a serpentine spiral on the first air duct assembly and on each cold storage plate.

6. The refrigerator according to claim 1, characterized in that, The top of the first air supply duct is provided with a first air outlet, which connects the first storage chamber and the evaporation chamber. A first damper is provided at the first air outlet, which can adjust the opening of the first air outlet.

7. The refrigerator according to claim 6, characterized in that, A first return air duct is provided between the first chamber and the second chamber. The first return air duct is located at the front end of the bottom of the evaporation chamber. The top end of the first return air duct is connected to the front end area of ​​the bottom of the evaporation chamber, and the bottom end of the first return air duct is connected to the second storage chamber. A second damper is provided at the top end of the first return air duct, and the second damper can adjust the opening degree of the first return air duct.

8. The refrigerator according to claim 7, characterized in that, A second return air duct is provided between the first chamber and the second chamber. The second return air duct is located at the rear end of the bottom of the evaporation chamber. The top end of the second return air duct is connected to the rear end area of ​​the bottom of the evaporation chamber, and the bottom end of the second return air duct is connected to the second storage chamber. A third damper is provided at the top end of the second return air duct, and the third damper can adjust the opening of the second return air duct.

9. The refrigerator according to claim 8, characterized in that, The third air damper is provided with multiple through holes.

10. The refrigerator according to claim 1, characterized in that, The first inner container is a freezer inner container, and the second inner container is a refrigerator inner container; the first storage compartment is a freezer compartment, and the second storage compartment is a refrigerator compartment.

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