Refrigerator

Abstract

The embodiment of the invention relates to the technical field of refrigeration, in particular to a refrigerator. According to the refrigerator, the air door is arranged at the air inlet, and the memory metal spring is arranged to sense the air temperature change of the evaporation cavity to deform so as to drive the air door to move relative to the air inlet. When the evaporator defrosts, the air door shields the air inlet, defrosting heat is prevented from entering the storage chamber, and the temperature of the storage chamber can be kept stable. And the top of the evaporation cavity is closed by shielding the air inlet, so that defrosting heat is favorably converged in the evaporation cavity and acts on the evaporator, and the defrosting efficiency is improved. When the evaporator refrigerates, the air door opens the air inlet, so that cold air passing through the evaporator can enter the storage chamber through the air inlet and the air duct, and the temperature of the storage chamber is reduced. And the air door is arranged at the air inlet and located on the path where defrosting hot air rises, and the effect of blocking defrosting heat is better.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of refrigeration technology, and in particular to a refrigerator. Background Art

[0002] During the use of the refrigerator, due to the moisture in the food stored in the storage room and the air, the air will be cold and frosted when passing through the evaporator. When the frost condenses to a certain thickness, it will affect the smoothness of the air flowing through the evaporator, thus affecting the refrigeration effect. Therefore, defrosting needs to be performed regularly.

[0003] In the related art, a heater is usually arranged under the evaporator, and the heat generated by the heater melts the frost. However, since the chamber where the evaporator is located is connected to the storage room, the heat generated by defrosting enters the storage room through the air duct, causing the temperature in the storage room to rise, affecting the storage quality. Summary of the invention

[0004] An embodiment of the present application provides a refrigerator capable of reducing the amount of defrosting heat entering a storage compartment.

[0005] In a first aspect, an embodiment of the present application provides a refrigerator, comprising:

[0006] A box body, a storage compartment and an evaporation chamber are arranged in the box body; an evaporator and a heater for defrosting the evaporator are arranged in the evaporation chamber; an air duct is arranged between the evaporation chamber and the storage compartment for cold air in the evaporation chamber to flow into the storage compartment;

[0007] The air inlet of the air duct is opened in the evaporation chamber; a damper is provided at the air inlet;

[0008] A memory metal spring is arranged at the air inlet, and the memory metal spring is configured to be deformed by heat when the temperature in the evaporation chamber rises, and to drive the damper to move and cover the air inlet.

[0009] The refrigerator of the embodiment of the present application is provided with a damper at the air inlet, and a memory metal spring is provided to sense the change of the air temperature in the evaporation chamber and deform to drive the damper to move relative to the air inlet. When the evaporator is defrosting, the damper shields the air inlet to block the defrosting heat from entering the storage compartment, which helps to keep the temperature of the storage compartment stable. Shielding the air inlet closes the top of the evaporation chamber, which helps the defrosting heat to gather in the evaporation chamber and act on the evaporator to improve the defrosting efficiency. When the evaporator is cooling, the damper opens the air inlet, so that the cold air passing through the evaporator can enter the storage compartment through the air inlet and the air duct, thereby reducing the temperature of the storage compartment. In addition, the damper is provided at the air inlet, which is in the path of the rising hot air of the defrosting, and the effect of blocking the defrosting heat is better.

[0010] In some embodiments of the present application, when the evaporator is refrigerating, the shape memory metal spring is configured to independently drive the air door to open the air inlet.

[0011] With such a setting, it is beneficial to simplify the structure at the air door, and the installation occupies a small space.

[0012] In some embodiments of the present application, the refrigerator further includes a biasing elastic member, and the biasing elastic member is connected to the air door; the resultant force of the biasing elastic member and the shape memory metal spring drives the air door to move.

[0013] The biasing elastic member provides an additional acting force for the opening of the air door, which helps to increase the opening speed of the member, making the movement of the air door more sensitive.

[0014] In some embodiments of the present application, the shape memory metal spring is a helical spring; and / or, the biasing elastic member is a helical spring. The helical spring has a simple structure, is conducive to processing, and the spring can axially stretch and deform, and the installation occupies a small space.

[0015] In some embodiments of the present application, the refrigerator further includes an air duct component, and the air duct component includes:

[0016] An air duct rear cover plate, facing the evaporation chamber; the air duct rear cover plate is configured to form the air inlet;

[0017] An air duct front cover plate, facing the storage compartment, the air duct front cover plate is connected to the air duct rear cover plate and encloses to form the air duct;

[0018] The shape memory metal spring is respectively connected to the air door and the air duct rear cover plate.

[0019] One end of the shape memory metal spring connected to the air duct rear cover plate is stationary. When the shape memory metal spring senses a temperature change and deforms, it drives the air door at the other end of the shape memory metal spring to move relative to the air duct rear cover plate, so as to open or close the air inlet.

[0020] In some embodiments of the present application, a first guiding structure is provided between the air door and the air duct rear cover plate, and the first guiding structure is configured to limit the deformation direction of the shape memory metal spring.

[0021] By using the first guiding structure to limit and guide the deformation direction of the shape memory metal spring, the deformation elastic force of the shape memory metal spring acts more concentratedly on the air door, improving the smoothness of the movement of the air door.

[0022] In some embodiments of the present application, a plurality of shape memory metal springs are provided, and the plurality of shape memory metal springs are arranged at intervals along the circumference of the air inlet.

[0023] This can ensure that the damper has sufficient driving force to move, and can also balance the circumferential force of the damper.

[0024] In some embodiments of the present application, the damper includes:

[0025] a plate body, opposite to the air inlet along the axial direction of the air inlet, the plate body being configured to open or cover the air inlet;

[0026] The first connecting seat is connected to the edge of the plate body, and the first connecting seat is connected to the memory metal spring.

[0027] The damper of the embodiment of the present application opens or covers the air inlet by setting a plate body, and a first connecting seat is set on the edge of the plate body for connecting with a memory metal spring to prevent the installation of the memory metal spring from affecting the plate body from covering or opening the air inlet.

[0028] In some embodiments of the present application, a side of the plate body facing the air inlet forms an annular matching curved surface;

[0029] When the evaporator is defrosted, the matching curved surface is matched and abutted against the component forming the air inlet to shield the air inlet.

[0030] The matching curved surface is abutted against the part forming the air inlet to form a contact surface of the curved surface, so that the damper has a better shielding effect on the air inlet.

[0031] In some embodiments of the present application, the damper further includes a reinforcing rib, and the reinforcing rib is arranged on a side of the plate body facing away from the air inlet.

[0032] By providing reinforcing ribs, the structural strength and stability of the damper are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0034] Figure 1 A schematic diagram of the structure of a refrigerator provided in some embodiments of the present application;

[0035] Figure 2 A schematic diagram of the structure inside the box provided in some embodiments of the present application;

[0036] Figure 3 A schematic diagram of the structure of the damper mechanism and the air duct components provided in some embodiments of the present application;

[0037] Figure 4 for Figure 3 Rear view of

[0038] Figure 5 for Figure 4 AA section view in;

[0039] Figure 6 A schematic diagram of the structure of the damper mechanism and the air duct components provided in some other embodiments of the present application;

[0040] Figure 7 for Figure 6 Rear view of the middle structure;

[0041] Figure 8 for Figure 7 BB section view in;

[0042] Fig. 9 for Figure 8 Cross-sectional view of the middle air door mechanism when opening the air inlet;

[0043] Fig.10 A schematic diagram of the structure of the air door mechanism and the air duct components provided in some other embodiments of the present application;

[0044] Fig.11 for Fig.10 Exploded diagram of

[0045] Fig.12 for Figure 4 Force cloud diagram of the stroke gate;

[0046] Fig.13 for Fig.10 Force cloud diagram of the stroke gate;

[0047] Fig.14 for Fig.10 Rear view of

[0048] Fig.15 for Figure 3 Rear view of the stroke door mechanism when closed;

[0049] Fig.16 for Fig.15 CC section view in;

[0050] Fig.17 A rear view of the air inlet closed by the damper mechanism provided in some embodiments of the present application;

[0051] Fig.18 for Fig.17 DD section view in;

[0052] Fig.19 A rear view of the air inlet opened by the damper mechanism provided in some embodiments of the present application;

[0053] Fig. 20 for Fig.19 EE cross-sectional view in;

[0054] Fig.21 A rear view of a damper mechanism closing an air inlet is provided for some embodiments of the present application;

[0055] Fig. 22 for Fig.21 FF section view in;

[0056] Fig.23 A rear view of the air inlet opened by the damper mechanism provided in some embodiments of the present application;

[0057] Fig.24 for Fig.23 GG section view in;

[0058] Fig.25 A schematic diagram of the structure of the damper mechanism opening the air inlet provided in some embodiments of the present application;

[0059] Fig.26 for Fig.25 Rear view of the center door mechanism closing the air inlet;

[0060] Fig. 27 for Fig.26 MM section view in;

[0061] Fig.28 A schematic diagram of the arrangement of a memory metal spring and a biasing elastic member provided in some embodiments of the present application;

[0062] Fig.29 A schematic diagram of the arrangement of memory metal springs and biasing elastic members provided in some other embodiments of the present application;

[0063] Fig.30 A schematic diagram of the structure of the air door mechanism and the air duct rear cover provided in some embodiments of the present application;

[0064] Fig.31 A schematic diagram of the structure of the air door mechanism and the air duct rear cover provided in some embodiments of the present application;

[0065] Fig.32a and Figure 32b for Fig.25 Force cloud diagram of the stroke gate;

[0066] Fig.33a and Figure 33b for Fig.31 Force cloud diagram of the stroke gate;

[0067] Fig.34 A schematic diagram of the structure of the damper provided in some embodiments of the present application;

[0068] Fig.35 A schematic diagram of the structure of the damper provided in some other embodiments of the present application;

[0069] Fig.36 A schematic diagram of the structure of the damper provided in some other embodiments of the present application;

[0070] Fig.37 It is a partial schematic diagram of a fixing base of some embodiments of the present application;

[0071] Fig.38 A schematic diagram of the structure of the damper mechanism provided in some embodiments of the present application when closing the air inlet;

[0072] Fig.39 for Fig.38 JJ section view in;

[0073] Fig.40 for Fig.39 An enlarged schematic diagram of the P region in FIG.

[0074] Fig.41 A schematic diagram of the structure of the damper mechanism provided in some embodiments of the present application when the air inlet is opened;

[0075] Fig.42 for Fig.41 KK section view in;

[0076] Fig.43 for Fig.42 An enlarged schematic diagram of the Q region in FIG.

[0077] Fig.44 An exploded view of the damper mechanism and air duct components provided in some embodiments of the present application.

[0078] Description of reference numerals:

[0079] 10: box body; 11: box liner; 12: rear side wall; 13: receiving chamber; 14: storage compartment; 15: evaporation chamber; 20: door body; 30: air door mechanism; 40: evaporator; 41: heater;

[0080] 100: air duct component; 101: air duct; 102: air return port; 110: air duct rear cover; 111: air inlet; 112: protrusion; 113: accommodating groove; 1131: closed cavity; 1132: protrusion; 114: fixing seat; 1141: limiting structure; 1142: accommodating channel; 1143: fourth opening; 1144: fixing portion; 115: limiting member; 116: first guide column; 117: limiting seat; 1171: first limiting slide; 1172: second limiting slide; 118: second guide column; 119: third guide column; 120: air duct front cover; 121: air outlet; 130: cooling fan;

[0081] 200: damper; 210: plate body; 211: matching curved surface; 220: first connecting seat; 221: first matching hole; 230: first guide structure; 2301: guide cavity; 231: hollow portion; 2311: first opening; 2312: second opening; 2313: third opening; 232: first connecting member; 240: connecting member; 250: second connecting seat; 251: second matching hole; 260: reinforcing rib; 270: flange; 280: third connecting seat; 290: matching recessed portion;

[0082] 300: memory metal spring; 310: elastic arm; 320: first connecting portion; 330: second connecting portion;

[0083] 400: biasing elastic member; 500: base; 510: third guide structure; 520: guide assembly; 521: fourth guide column; 522: matching portion. DETAILED DESCRIPTION

[0084] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0085] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0086] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components explicitly listed but may include other components not explicitly listed or inherent to such products or devices.

[0087] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0088] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0089] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0090] In the related art, a heater is usually arranged under the evaporator, and the heat generated by the heater melts the frost. However, since the chamber where the evaporator is located is connected to the storage room, the heat generated by defrosting enters the storage room through the air duct, causing the temperature in the storage room to rise, affecting the storage quality.

[0091] For example, if the evaporator is installed at the rear side of the freezer compartment, the evaporation chamber where the evaporator is located is connected to the freezer compartment through the air duct and the air supply port; and the evaporation chamber is connected to the freezer compartment through the return air port. Under the action of the fan in the air duct, the air in the freezer compartment enters the evaporation chamber through the return air port and exchanges heat with the evaporator; the cold air after heat exchange enters the freezer compartment through the air duct and the air supply port, and the cycle is repeated to reduce the temperature of the freezer compartment.

[0092] During the defrosting process, the heater under the evaporator generates defrosting heat to melt the frost on the evaporator and evaporation chamber. The defrosting heat enters the freezer compartment through the air duct, causing the freezer compartment temperature to rise, and even making the freezer compartment temperature higher than zero degrees, causing the frozen items to thaw. During the continuous defrosting and refrigeration process of the refrigerator, the frozen items are repeatedly frozen and thawed, affecting the preservation effect of the food.

[0093] Therefore, a mechanism is required to prevent defrosting heat from entering the storage compartment. Combined with the communication structure between the storage compartment and the evaporation chamber, the return air duct between the storage compartment and the evaporation chamber can be blocked, and the supply air duct between the storage compartment and the evaporation chamber can also be blocked to prevent defrosting heat from entering the storage compartment.

[0094] The researchers of this application found that in the structure of the refrigerator, the air supply port is usually set above the return air port, and the hot air carrying the defrosting heat has a low density and is in an upward state. Therefore, more defrosting heat enters the storage compartment through the air duct and the air supply port. Therefore, it is considered to set a damper mechanism between the air supply port of the storage compartment and the evaporation chamber.

[0095] When setting the damper mechanism, in addition to considering that the damper mechanism can block heat during defrosting, it is also necessary to ensure that the damper mechanism does not block cold air during cooling. Therefore, the damper mechanism has two states, namely, a blocking state and a conducting state. During defrosting, the damper mechanism is adjusted to the blocking state to block the defrosting heat; during cooling, the damper mechanism is adjusted to the conducting state to allow cold air to flow between the storage compartment and the evaporation chamber.

[0096] Therefore, the researchers of this application continued to study that if the damper mechanism is set in the air supply duct, not only will the structure be complicated, but the volume of the air supply duct will increase, affecting the storage space; if the damper mechanism is set at the air supply port, since there are usually multiple air supply ports, the damper mechanism will also be complicated. Therefore, this application sets the damper mechanism at the air inlet of the air duct, which is conducive to simplifying the structure, and the damper mechanism occupies the space between the evaporation chamber and the air duct, which does not affect the storage space.

[0097] Since the damper mechanism has two states, a driving force is required to drive the damper mechanism to switch between the two states. One way is to add an additional driving force, for example, the damper mechanism is equipped with a driver, such as a motor, to drive the damper mechanism to switch between the two states, which not only increases the cost, but also requires a larger installation space for the damper mechanism. Another way is to use the temperature difference between the defrosting heat and the refrigeration cold air as the driving energy source, without the need for an additional driver, and also helps to reduce energy consumption.

[0098] The researchers of this application used a memory metal spring, which can return to a preset shape under specific temperature conditions, so that the memory metal spring exhibits two states due to different temperatures during defrosting and refrigeration, providing driving force for the damper mechanism.

[0099] The embodiment of the present application sets a damper mechanism to block the passage between the evaporation chamber where the evaporator is located and the storage compartment during defrosting, thereby reducing the entry of defrosting hot air into the storage compartment and reducing the temperature fluctuation of the storage compartment during the defrosting process; it can also reduce the heat diffusion area during defrosting, so that the defrosting heat is concentrated, reducing the defrosting market, improving the defrosting efficiency, and reducing the energy consumption of the refrigerator.

[0100] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0101] The present application provides a refrigerator, comprising:

[0102] A box body, a storage compartment and an evaporation chamber are arranged in the box body; an evaporator and a heater for defrosting the evaporator are arranged in the evaporation chamber; an air duct is arranged between the evaporation chamber and the storage compartment for cold air in the evaporation chamber to flow into the storage compartment;

[0103] The air inlet of the air duct is opened in the evaporation chamber; thus, the cold air in the evaporation chamber enters the air duct through the air inlet, and enters the storage compartment through the air duct. Among them, a damper is provided at the air inlet;

[0104] At least two memory metal springs are also provided at the air inlet. The memory metal springs are configured to deform in response to changes in the air temperature of the evaporation chamber. The deformation serves as a driving force to drive the damper to move.

[0105] The memory metal spring is configured to deform when the temperature in the evaporation chamber rises, and drive the damper to move and cover the air inlet;

[0106] When the evaporator is cooling, the memory metal spring drives the damper to open the air inlet so that cold air can enter the storage compartment through the air inlet and the air duct. When the heater defrosts the evaporator, the memory metal spring drives the damper to cover the air inlet.

[0107] In some embodiments, a biasing elastic member is further provided at the air inlet. The memory metal spring is constructed to be deformed by heat when the temperature in the evaporation chamber rises, and drives the biasing elastic member to produce elastic deformation, and the combined force of the two jointly drives the damper to move to cover the air inlet. The projections of the memory metal spring and the biasing elastic member on the plane where the air inlet is located are staggered, so that the projections of the memory metal spring and the biasing elastic member on the plane where the air inlet is located do not overlap. It can be understood that the memory metal spring and the biasing elastic member are set at different positions at the air inlet, which can make the installation of the memory metal spring and the biasing elastic member simple and the connection structure simple.

[0108] In some embodiments, the projections of the memory metal spring and the biasing elastic member on the plane where the air inlet is located overlap. It can be understood that the memory metal spring and the biasing elastic member are set at the same position at the air inlet or have a small difference. The force of the memory metal spring on the damper and the force of the shielding member on the damper are separated by a small distance or even overlap in the plane where the air inlet is located. In this way, the forces of the memory metal spring and the biasing elastic member can be concentrated, the torque caused by the interval between the two forces can be reduced, the possibility of deformation and tilting of the damper can be reduced, and the smoothness of the movement of the damper can be improved.

[0109] In some embodiments, at least two memory metal springs are provided at the air inlet, and at least two memory metal springs are at the same height from the bottom surface of the box in the vertical direction. In this way, at least two memory metal springs are at the same horizontal height in the evaporation chamber, which is beneficial to improve the consistency of temperature sensing by the at least two memory metal springs, and then improve the consistency of deformation of the at least two memory metal springs, which helps to improve the consistency of the force acting on the damper by the at least two memory metal springs, and then help to improve the balance of the driving force on the damper, reduce the movement obstruction of the damper due to uneven force, and reduce the deformation of the damper due to uneven force, which affects the sealing performance of the air inlet.

[0110] In some embodiments, at least part of the memory metal spring is exposed in the evaporation chamber. It can be understood that at least part of the memory metal spring is exposed outside the evaporation chamber, so that at least part of the memory metal spring can directly contact the air in the evaporation chamber to sense the change in the air temperature of the evaporation chamber and ensure the rapid response of the opening and closing movement of the damper.

[0111] In some embodiments, when the damper covers the air inlet, the biasing elastic member is located in a closed cavity formed by the damper and the air duct component, so that the biasing elastic member can be isolated from the evaporation cavity, thereby preventing the hot and humid air in the evaporation cavity from contacting the biasing elastic member, thereby avoiding the possibility of condensation forming water droplets and ice on the biasing elastic member.

[0112] The damper and the rear cover of the air duct of the air duct component enclose a closed cavity, wherein at least one of the damper and the rear cover of the air duct forms a recessed structure to provide space for the formation of the closed cavity.

[0113] In some embodiments, when the damper covers the air inlet, the memory metal spring has an extended length along its axial direction; when the damper opens the air inlet, the memory metal spring has a contracted length along its axial direction. The difference between the extended length and the contracted length is greater than or equal to the preset distance between the rear side of the air duct component and the damper required by the air volume of the air inlet, so that the deformation length of the memory metal spring is greater than or equal to the preset distance between the rear side of the air duct component and the damper required by the air volume of the air inlet, ensuring that the air volume requirement of the air inlet is met.

[0114] The specific structure and function of the refrigerator in the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0115] Combination Figure 1 Some embodiments of the present application provide a refrigerator, which includes a box body 10. The box body 10 can be constructed to form a storage compartment 14 with a take-in and put-out opening for storing items.

[0116] A plurality of storage compartments 14 may be provided to expand the storage space. According to different storage temperatures of the storage compartments 14, the storage compartments 14 may include at least one refrigerating compartment and at least one freezing compartment. The internal temperature of the refrigerating compartment may be maintained between about 0°C and 5°C to store items in a refrigerated mode; the internal temperature of the freezing compartment may be maintained between about -30°C and 0°C to store items in a frozen mode.

[0117] In some possible implementations, at least one storage compartment 14 may also be configured as a vacuum chamber or a temperature-changing chamber, etc., which will not be described in detail in the embodiments of the present application.

[0118] Exemplarily, two storage compartments 14 may be provided, and the two storage compartments 14 may be stacked in the vertical direction; the two storage compartments 14 may be arranged side by side in the horizontal direction. One of them may be set as a refrigerating compartment, and the other may be set as a freezing compartment.

[0119] In some embodiments, in combination Figure 1 and Figure 2 The box body 10 may include a box liner 11 and a box shell. The box liner 11 may be configured to form a storage compartment 14 with a front opening, and the front opening is a take-out opening. The box shell may be connected to the outside of the box liner 11 to form the appearance of the refrigerator.

[0120] The box body 10 may further include a box heat insulation layer, which may be disposed between the box liner 11 and the box shell. The box heat insulation layer can insulate the storage compartment 14 to minimize heat exchange between the storage compartment 14 and the outside of the refrigerator, which is beneficial to ensuring the refrigeration effect of the refrigerator.

[0121] The refrigerator of the embodiment of the present application may further include a refrigeration system, which is used to reduce the air temperature of the storage compartment 14. Exemplarily, the refrigeration system may be disposed in the cabinet 10. The refrigeration system may include a compressor, a condenser, a throttle, and an evaporator 40 that are cyclically connected.

[0122] When the refrigeration system is running, the compressor compresses the refrigerant vapor to generate high-temperature and high-pressure refrigerant vapor, and transports the refrigerant vapor to the condenser. The condenser liquefies the high-temperature and high-pressure refrigerant vapor to generate high-temperature and low-pressure refrigerant liquid, and transports it to the throttle. After the throttle reduces the pressure of the refrigerant liquid, the high-pressure and low-temperature refrigerant liquid is converted into a low-pressure and low-temperature refrigerant liquid, and transported to the evaporator 40. After receiving the low-pressure and low-temperature refrigerant liquid, the evaporator 40 makes it boil under isobaric conditions, absorbs heat and vaporizes to form refrigerant vapor, so as to reduce the temperature in the storage compartment 14.

[0123] Continue to refer to Figure 1 The refrigerator of the embodiment of the present application may further include a door body 20, which is rotatably connected to the cabinet 10 to open or close the access opening. Exemplarily, the door body 20 is hinged to the cabinet 10.

[0124] Each storage compartment 14 may be provided with a corresponding door body 20 ; or, each storage compartment 14 may be provided with two door bodies 20 , and the two door bodies 20 may rotate in opposite directions to open or close the storage compartment 14 .

[0125] Of course, in some possible implementations, a drawer is provided in the storage compartment 14 , and the outer end of the drawer is structured to form a door body 20 .

[0126] In some embodiments, the door body 20 may include a door liner. When the door body 20 closes the refrigerating compartment, the door liner faces the refrigerating compartment.

[0127] The door body 20 may include: a door outer shell; the door outer shell may be connected to the outer side of the door liner to form the appearance of the door body 20. The door outer shell may be rotatably connected to the cabinet 10 so that the door body 20 opens or closes the refrigerating compartment.

[0128] The door body 20 may further include a door heat insulation member, which may be disposed in the space between the door liner and the door outer shell. The door heat insulation member can insulate the storage compartment 14 to minimize heat exchange between the storage compartment 14 and the outside of the refrigerator, which is beneficial to ensuring the refrigeration effect of the refrigerator. The door heat insulation member may be a foam layer.

[0129] In some embodiments, a door shelf is provided on one side of the door body 20 facing the refrigerating compartment to increase the storage space of the refrigerator. The door shelf has a storage cavity opening upward to store items.

[0130] Reference Figure 2 In some embodiments of the present application, the box body 11 of the box body 10 is constructed to form a receiving cavity 13 with a take-in and put-out opening. The receiving cavity 13 can not only form a storage compartment 14, but also provide installation space for other components of the refrigerator.

[0131] In some embodiments of the present application, the refrigerator may further include an air duct component 100 , which is used to construct a channel for cold air to flow, and to guide the cold air cooled by the evaporator 40 into the storage compartment 14 .

[0132] The air duct component 100 is installed in the accommodating cavity 13. It can be understood that the air duct component 100 is installed in the box 11. The air duct component 100 is arranged close to the rear side wall 12 of the box 11, so that a larger storage compartment 14 can be formed on the front side of the box 11.

[0133] The air duct component 100 extends the receiving cavity 13 of the box 11 along the depth direction of the refrigerator (corresponding to Figure 2 The Y-axis direction of the evaporation chamber 15 and the storage chamber 14 are separated. Figure 2 There is a gap between the air duct component 100 and the rear side wall 12 of the box 11 to form an evaporation chamber 15, and a storage compartment 14 is formed on the side of the air duct component 100 facing the access port.

[0134] The evaporator 40 of the refrigeration system is installed in the evaporation chamber 15, and the evaporator 40 is located at the lower part of the evaporation chamber 15. A heater 41 is arranged below the evaporator 40 to provide defrosting heat for the evaporator 40 and defrost the evaporator 40. Of course, this is not a limitation on the position of the heater 41, and the heater 41 can also be arranged at other positions of the evaporator 40.

[0135] Continue to refer to Figure 2 The air duct component 100 is structured to form an air duct 101 and an air inlet 111, the air inlet 111 connects the air duct 101 and the evaporation chamber 15, and the air inlet 111 is located on the side of the air duct component 100 facing the evaporation chamber 15. Figure 2 In the Z-axis direction), the air inlet 111 is located above the evaporator 40, so that the air inlet 111 is connected to the top of the evaporation chamber 15, so that the cold air after heat exchange in the evaporator 40 can enter the air duct 101 through the air inlet 111.

[0136] The air duct 101 is in communication with the storage compartment 14 to guide the cold air after heat exchange in the evaporator 40 into the storage compartment 14 to reduce the temperature of the storage compartment 14. The air duct component 100 is provided with an air supply port 121 on one side facing the storage compartment 14, and the air supply port 121 connects the air duct 101 and the storage compartment 14. A plurality of air supply ports 121 may be provided, some of which may be arranged at intervals along the width direction of the refrigerator, and some of which may be arranged at intervals along the height direction of the refrigerator to improve the uniformity of the temperature in the storage compartment 14.

[0137] In some embodiments, there is a gap between the bottom end of the air duct component 100 and the box 11 to form a return air port 102. The return air port 102 is located below all the air supply ports 121. The return air port 102 connects the storage compartment 14 and the bottom of the evaporation chamber 15, and the connection position between the return air port 102 and the evaporation chamber 15 is located below the evaporator 40, so that the cold air from the return air port 102 can pass through the evaporator 40 and exchange heat.

[0138] In some embodiments, a cooling fan 130 is further installed in the air duct 101 to provide power for the circulation of cold air between the storage compartment 14 and the evaporation chamber 15. The cooling fan 130 is opposite to the air inlet 111, so that a negative pressure can be formed at the air inlet 111, thereby improving the efficiency of the cold air in the evaporation chamber 15 entering the storage compartment 14.

[0139] Exemplarily, the air inlet 111 is a circular opening, thereby matching the shape of the cooling fan 130 .

[0140] Through the above arrangement, under the action of the refrigeration fan 130, the cold air in the evaporation chamber 15 after heat exchange with the evaporator 40 enters the air duct 101 through the air inlet 111, and then enters the storage room 14 through the air supply port 121; the air in the storage room 14 returns to the evaporation chamber 15 through the return air port 102, and exchanges heat with the evaporator 40. This cycle is repeated to reduce the temperature of the storage room 14.

[0141] In some embodiments, Figure 2 The storage compartment 14 shown in the figure is a freezing compartment. A refrigeration air duct is connected to the top of the air duct component 100, and the refrigeration air duct is connected to the refrigeration compartment to provide cold air for the refrigeration compartment.

[0142] Continue to refer to Figure 2 In some embodiments, the air duct component 100 includes an air duct rear cover plate 110 and an air duct front cover plate 120, which are fixedly connected and enclosed to form an air duct 101. The air duct rear cover plate 110 is located at the rear side of the air duct front cover plate 120, so that the air duct rear cover plate 110 faces the evaporation chamber 15, and the air duct front cover plate 120 faces the storage compartment 14. Among them, the air inlet 111 is set on the air duct rear cover plate 110, and the air outlet 121 is set on the air duct front cover plate 120.

[0143] Continue to refer to Figure 2 In some embodiments of the present application, the refrigerator further includes a damper mechanism 30, which is located in the evaporation chamber 15. The damper mechanism 30 is located in the upper part of the evaporation chamber 15 and above the evaporator 40. The damper mechanism 30 is connected to the air inlet 111 in the depth direction (corresponding to Figure 2The damper mechanism 30 is configured to open the air inlet 111 when the evaporator 40 is cooling, and to close the air inlet 111 when the evaporator 40 is defrosting.

[0144] In some embodiments of the present application, the damper mechanism 30 can be installed on the rear cover plate 110 of the air duct. In this way, the damper mechanism 30 can be first installed on the rear cover plate 110 of the air duct and then assembled into the box 11. The relative position of the damper mechanism 30 and the air inlet 111 is accurate and the installation is convenient. Compared with setting a shielding structure in the air duct 101, the damper mechanism 30 is installed on the rear cover plate 110 of the air duct, which does not occupy the space of the air duct 101, has no effect on the flow field distribution in the air duct 101, and does not affect the refrigeration effect of the refrigerator during refrigeration. Moreover, the installation of the damper mechanism 30 does not affect the integrity of the box 11, and there is no need to set a mounting structure on the box 11, which is conducive to ensuring the thermal insulation performance of the box 11.

[0145] In some other embodiments of the present application, the damper mechanism 30 may be installed on the rear side wall 12 of the casing 11 , so that the damper mechanism 30 is still located in the evaporation chamber 15 .

[0146] Combination Figures 3 to 5 In some embodiments, the damper mechanism 30 may include: a damper 200 , and the damper 200 is configured to shield or open the air inlet 111 .

[0147] The damper 200 may be substantially plate-shaped to reduce the space occupied by the damper mechanism 30 along the depth direction of the refrigerator. In some embodiments, the main body of the damper 200 may be circular, and a connection structure may be provided at the edge of the damper 200 to install a memory metal spring.

[0148] The damper mechanism 30 may further include a memory metal spring 300 . The memory metal spring 300 is configured to deform in response to a change in the air temperature of the evaporation chamber 15 , so as to drive the damper 200 to move and open or close the air inlet 111 .

[0149] The memory metal spring 300 may be a memory alloy spring, such as nickel-titanium alloy.

[0150] In some embodiments, the memory metal spring 300 is configured to deform in response to changes in the air temperature of the evaporation chamber 15 , so as to drive the damper 200 to move along the axial direction of the air inlet 111 to open or close the air inlet 111 .

[0151] When the air inlet 111 is arranged in the vertical plane of the refrigerator, the axial direction of the air inlet 111 is parallel to the depth direction of the refrigerator. The width direction of the refrigerator and the height direction of the refrigerator determine the vertical plane of the refrigerator.

[0152] In other embodiments, the memory metal spring 300 is constructed to sense the change in air temperature in the evaporation chamber 15 and deform in a vertical plane to drive the damper 200 to move in the vertical plane of the refrigerator, so that the damper 200 is opposite to the air inlet 111 and covers the air inlet 111, or the damper 200 is offset from the air inlet 111 and opens the air inlet 111.

[0153] Of course, the damper 200 may move along a straight line or along a curve within the vertical plane of the refrigerator.

[0154] In some other embodiments, the memory metal spring 300 may be configured to deform in response to changes in the air temperature of the evaporation chamber 15, and the deformation direction of the memory metal spring 300 has a certain angle relative to the axial direction of the air inlet 111. In this way, the damper 200 moves along the deformation direction of the memory metal spring 300 to open or cover the air inlet 111. When the memory metal spring 300 drives the damper 200 to move, the interval between the damper 200 and the air duct component 100 along the axial direction of the air inlet 111 changes; and the relative position of the damper 200 and the air inlet 111 in the vertical plane of the refrigerator also changes.

[0155] In some embodiments, in combination Figure 4 and Figure 5 The memory metal spring 300 is configured to sense the change in the air temperature of the evaporation chamber 15 and to extend or contract the air inlet 111 in the axial direction, so as to drive the damper 200 to move in the axial direction of the air inlet.

[0156] With such arrangement, during the movement of the damper 200, the intervals between various parts of the damper 200 and the plane where the air inlet 111 is located change substantially uniformly. When the damper 200 closes the air inlet 111, it helps to ensure that the damper 200 seals the air inlet 111 uniformly; when the damper 200 opens the air inlet 111, it helps to make the air inlet intervals of various parts around the air inlet 111 uniform, thereby ensuring uniform air intake.

[0157] In some embodiments, the memory metal spring 300 is a coil spring, for example, the memory metal spring 300 is a cylindrical coil spring, a conical coil spring, etc. The coil spring has a simple structure and is easy to process. Moreover, the coil spring can be deformed and stretched along its axial direction. The memory metal spring 300 is arranged along the axial direction of the air inlet 111, so as to facilitate driving the damper 200 to move along the axial direction of the air inlet 111.

[0158] In the embodiment of the present application, the memory metal spring 300 adopts a cylindrical coil spring, relative to a conical coil spring, and the diameters of each coil are the same. The axial direction of the memory metal spring 300 is parallel to the horizontal plane, so that the memory metal spring 300 is at the same horizontal height along its axial direction, further improving the consistency of the temperature sensing of the memory metal spring 300.

[0159] In some embodiments, in combination Figure 4 and Figure 5 The axial direction of the memory metal spring 300 is parallel to the depth direction of the refrigerator (corresponding to Figure 5 In this way, the expansion and contraction direction of the memory metal spring 300 is the same as the movement direction of the damper 200, so that the deformation force of the memory metal spring 300 can act on the movement stroke of the damper 200, thereby increasing the movement speed of the damper 200. In addition, such a configuration also helps to reduce the movement resistance of the damper 200, making the movement of the damper 200 smoother and reducing the possibility of the damper 200 being stuck during movement.

[0160] In other embodiments, the axial direction of the memory metal spring 300 may be inclined relative to the depth direction of the refrigerator, and when the memory metal spring 300 moves along its axial direction, the damper 200 moves along the axial direction of the memory metal spring 300, that is, the moving direction of the damper 200 is inclined with respect to the depth direction of the refrigerator, so that the damper 200 can be staggered relative to the air inlet 111 in the vertical plane, reducing the wind resistance of the cold air entering the air inlet 111. The vertical plane is a plane determined by the width direction of the refrigerator and the height direction of the refrigerator.

[0161] In other embodiments, in combination Figures 6 to 9 , the memory metal spring 300 is located at the same level, wherein the deformation direction of the memory metal spring 300 forms an angle with the axial direction of the air inlet. Figure 6 A limit seat 117 is provided on the air duct rear cover plate 110 , and the limit seat 117 is connected to one end of the memory metal spring 300 and provides a guide for the deformation of the memory metal spring 300 .

[0162] Combination Figures 7 to 9 A connecting component 240 is provided at the edge of the damper 200, and the connecting component 240 is fixedly connected to the other end of the memory metal spring 300, and the connection method includes but is not limited to clamping, screw fixing, etc.

[0163] Combination Figure 7 and Figure 8 The memory metal spring 300 may include two elastic arms 310, and the two elastic arms 310 are arranged along the height direction of the refrigerator (corresponding to Figure 8 The memory metal spring 300 is configured such that when sensing the temperature change of the evaporation chamber 15, the angle between the two elastic arms 310 changes, thereby driving the damper 200 to move in the axial direction of the air inlet (corresponding to the direction of the middle Z axis). Figure 8 The air inlet can be opened or closed by moving the control panel in the Y-axis direction.

[0164] Combination Figure 6 and Figure 8 When the evaporator defrosts, the air temperature in the evaporation chamber rises under the action of the heater, and the hot air rises. The memory metal spring 300 senses the temperature rise, and the two elastic arms 310 deform toward each other, so that the angle between the two elastic arms 310 becomes smaller, and under the guidance and restriction of the limit seat 117, the damper 200 is driven to move toward the air inlet 111 along the axial direction of the air inlet 111 to shield the air inlet 111, and prevent the defrosting heat from entering the storage compartment 14 through the air inlet 111 and the air duct 101.

[0165] Combination Figure 6 and Fig. 9 When the evaporator is cooling, the air temperature in the evaporation chamber decreases under the action of the evaporator. The memory metal spring 300 senses the decrease in air temperature, and the two elastic arms 310 deform away from each other, so that the angle between the two elastic arms 310 increases, and under the guidance and restriction of the limit seat 117, the damper 200 is driven to move away from the air inlet 111 along the axial direction of the air inlet 111 to open the air inlet 111, so that the cold air in the evaporation chamber can enter the storage compartment through the air inlet 111 and the air duct.

[0166] Continue to refer to Figures 6 to 9 The memory metal spring 300 may further include a first connecting portion 320 , which connects one end of the two elastic arms 310 , and the first connecting portion 320 is connected to the connecting component 240 .

[0167] The memory metal spring 300 may further include a second connecting portion 330 . The second connecting portion 330 is disposed at the other end of the two elastic arms 310 , and the second connecting portion 330 is connected to the limiting seat 117 .

[0168] In some embodiments, the limiting seat 117 is constructed to form a first limiting slide 1171 and a second limiting slide 1172 , wherein the first limiting slide 1171 extends along the axial direction of the air inlet 111 , and the second limiting slide 1172 extends along the height direction of the refrigerator.

[0169] The first connection portion 320 is located in the first limiting slide 1171 , and the movement direction of the damper 200 is guided by the cooperation between the first connection portion 320 and the first limiting slide 1171 .

[0170] The second connection portion 330 can be slidably installed in the second limiting slideway 1172 , which can not only realize the connection between the limiting seat 117 and the memory metal spring 300 , but also limit the deformation direction of the elastic arm 310 .

[0171] exist Figures 6 to 9In the illustrated solution, the two elastic arms 310 of the memory metal spring 300 are configured to be elastically deformed so that the angle between the two elastic arms 310 changes, thereby driving the damper 200 to move axially along the air inlet 111 .

[0172] In some embodiments of the present application, at least two memory metal springs 300 are provided, for example, two, three, four, etc. memory metal springs 300 are provided. Multiple memory metal springs 300 are evenly spaced and arranged along the circumference of the damper 200. Such an arrangement is conducive to improving the uniformity of the force applied to the damper 200 along the circumference.

[0173] like Figure 3 As shown, three memory metal springs 300 are provided, and the three memory metal springs 300 are evenly spaced along the circumference of the damper 200. The angle difference between two adjacent memory metal springs 300 along the circumference of the air inlet 111 is 120°.

[0174] For example, in combination Fig.10 and Fig.11 Two memory metal springs 300 are provided, which can provide sufficient driving force for the damper 200 and avoid increasing the cost due to providing too many memory metal springs 300.

[0175] In some embodiments of the present application, at least two memory metal springs 300 are located at the same horizontal height. It can be understood that at least two memory metal springs 300 are at the same height from the bottom surface of the box in the vertical direction. Among them, all the memory metal springs 300 are at the same horizontal height, so that all the memory metal springs 300 can sense the air temperature change in the evaporation chamber at the same time, thereby improving the consistency of the deformation of all the memory metal springs 300. In this way, it is helpful to improve the consistency of the force of the damper 200 under the multiple memory metal springs 300, thereby improving the smoothness of the movement of the damper 200 and reducing the possibility of the damper 200 being stuck. In addition, the possibility of warping and deformation of the damper 200 can also be reduced, which is conducive to improving the reliability and stability of the damper mechanism 30.

[0176] Combination Figure 3 , Figure 4 as well as Fig.12 At least two memory metal springs 300 are arranged at different levels at the damper 200. The two memory metal springs 300 at the top are at the same level, namely the memory metal springs 300 at positions b and c; a memory metal spring 300 is arranged at position a below, which is lower than the positions at positions B and C.

[0177] When the evaporator is cooling, the cold air moves upward from the evaporator. Since the three memory metal springs 300 are at different horizontal heights, the memory metal spring 300 at the bottom A senses the cold air first and undergoes a phase change, driving the damper 200 at A to move. At this time, the cold air has not yet risen to B and C, and the memory metal springs 300 at these two locations have not yet contacted the cold air, and their states remain unchanged. In this way, the damper 200 at A begins to move, while B and C do not move. The damper 200 will deflect, which will increase the friction of the damper 200 and increase the risk of the damper 200 getting stuck. As the use time increases, the damper 200 will be subjected to uneven force, which will cause the damper 200 to warp and deform. Refer to Fig.12 This will affect the airtightness of the damper 200 shielding the air inlet 111. The hot and humid air of the defrosting will enter the air inlet through the gap between the damper 200 and the air duct component 100, affecting the temperature of the storage compartment.

[0178] Combination Fig.10 , Fig.11 as well as Fig.13 , at least two memory metal springs 300 are at the same level, so that at least two memory metal springs 300 can sense temperature changes at the same time. Fig.13 When the evaporator is cooling, the two memory metal springs 300 sense the temperature change at the same time, which can ensure that the damper 200 is evenly stressed and moves synchronously, the damper 200 is less deformed, the risk of the damper 200 getting stuck is reduced, the risk of the damper 200 warping and deformation is reduced, and the reliability of the damper mechanism is improved.

[0179] In some embodiments, in combination Fig.14 At least two memory metal springs 300 are arranged at intervals along the horizontal center line H of the damper 200, and the horizontal center line H passes through the center O of the damper 200 and has the same horizontal height. In this way, the memory metal springs 300 are at the same horizontal height, and the force on the damper 200 along the height direction of the refrigerator can be balanced, further improving the smoothness of the movement of the damper 200 and reducing the possibility of the damper 200 getting stuck. Among them, the horizontal center line H is parallel to the width direction of the refrigerator.

[0180] Continue to refer to Fig.14 In some embodiments, at least two memory metal springs 300 are symmetrically arranged about the vertical center line V of the damper 200. This can improve the balance of the forces on both sides of the vertical center line of the damper 200, which helps to improve the smoothness of the movement of the damper 200. The vertical center line V of the damper 200 is parallel to the height direction of the refrigerator and passes through the center O of the damper 200. The vertical center line V is perpendicular to the horizontal center line H.

[0181] In some specific implementations, four memory metal springs 300 are provided, and the four memory metal springs 300 are arranged at intervals along the horizontal center line H; and two memory metal springs 300 are arranged on both sides of the vertical center line V. The four memory metal springs 300 are arranged symmetrically about the vertical center line V. Such an arrangement helps to ensure that the damper 200 has sufficient driving force.

[0182] In some specific implementations, such as Fig.14 As shown, two memory metal springs 300 are provided, and the two memory metal springs 300 are arranged at intervals along the horizontal center line H; and one memory metal spring 300 is arranged on both sides of the vertical center line V. The two memory metal springs 300 are arranged symmetrically about the vertical center line V. In this way, the damper 200 can be driven evenly by the two memory metal springs 300, and the cost increase caused by the setting of the memory metal springs 300 can be avoided, and the consistency of deformation caused by the setting of too many memory metal springs 300 can be avoided.

[0183] In some embodiments, when the evaporator 40 is cooling, the temperature in the evaporation chamber 15 can reach a relatively low temperature, for example, -18°C to -20°C, and the memory metal spring 300 undergoes a phase transformation from austenite to martensite, and the memory metal spring 300 stretches. When the evaporator 40 is defrosting, the temperature in the evaporation chamber 15 can reach 2°C-5°C, and the memory metal spring 300 undergoes a phase transformation from martensite to austenite, and the memory metal spring 300 contracts along the depth direction of the refrigerator.

[0184] In some implementations, the material of the memory metal spring 300 is designed so that the memory metal spring 300 contracts along the depth direction of the refrigerator when the evaporator 40 is cooling, and extends along the depth direction of the refrigerator when the evaporator 40 is defrosting.

[0185] Since the memory metal spring 300 needs to sense the change in the air temperature of the evaporation chamber 15 and deform, at least a portion of the memory metal spring 300 is exposed outside the evaporation chamber 15 to improve the sensitivity of the memory metal spring 300 in sensing temperature changes.

[0186] In some embodiments of the present application, the memory metal spring 300 is respectively connected to the damper 200 and the air duct component 100. The memory metal spring 300 is respectively connected to the damper 200 and the air duct rear cover 110. One end of the memory metal spring 300 connected to the air duct component 100 is fixed, and when the memory metal spring 300 is elastically deformed, it drives the damper 200 to move relative to the air duct component 100.

[0187] In this way, when the evaporator is defrosting, the memory metal spring 300 is constructed to drive the damper 200 to shield the air inlet 111. In this way, it is possible to prevent the defrosting heat from entering the storage compartment through the air inlet and the air duct 101, thereby affecting the temperature of the storage compartment. In addition, shielding the air inlet 111 closes the top of the evaporation chamber 15, which helps the defrosting heat to gather in the evaporation chamber and act on the evaporator to improve the defrosting efficiency. When the evaporator is cooling, the damper 200 is at least driven by the memory metal spring 300 to move away from the air duct component 100 to open the air inlet 111. In this way, the cold air after heat exchange in the evaporator enters the air duct 101 through the air inlet 111, and enters the storage compartment through the air supply port to reduce the temperature of the storage and ensure the normal operation of the refrigerator's refrigeration function.

[0188] In some embodiments of the present application, the memory metal spring 300 is made of a two-way memory metal. Among them, a two-way shape memory alloy is a material that can automatically change its shape during heating and cooling. The two-way shape memory alloy will return to a preset high-temperature shape when heated, and will automatically change to another low-temperature shape when cooled. This two-way shape change can be achieved without external force.

[0189] In some embodiments, in combination Figures 3 to 5 The memory metal spring 300 is configured to sense the change in the air temperature of the evaporation chamber 15 and extend or contract along its axial direction, and independently drive the damper 200 to move along the axial direction of the air inlet 111. The "independent" here can be understood as: the driving force of the damper 200 is only the deformation force of the memory metal spring 300, and there is no other auxiliary driving force.

[0190] Combination Fig.15 and Fig.16 When the evaporator is defrosted, the memory metal spring 300 is configured to drive the damper 200 to move toward the air inlet 111 and abut against the air duct component 100 to shield the air inlet 111. For example, when the evaporator is defrosted, under the action of the heater, the air temperature in the evaporation chamber rises, and the hot air rises upward. The memory metal spring 300 at the same level senses the increase in the air temperature of the evaporation chamber, undergoes a phase change and stretches synchronously, drives the damper 200 to move toward the air duct component 100, and abuts against the air duct rear cover 110 of the air duct component 100 to shield the air inlet 111.

[0191] When the evaporator is cooling, combined Figure 4 and Figure 5, the memory metal spring 300 is configured to drive the damper 200 to move away from the air inlet 111 to open the air inlet 111. Exemplarily, when the evaporator is cooling, the air temperature in the evaporation chamber decreases under the action of the evaporator. The memory metal spring 300 at the same level senses the decrease in the air temperature in the evaporation chamber, and synchronously undergoes a phase change and contracts, driving the damper 200 to move away from the air duct component 100, so that a gap is formed between the damper 200 and the air duct rear cover 110, and the air inlet 111 is opened. In this way, the cold air in the evaporation chamber can enter the storage compartment through the air duct 101 and the air supply port 121 under the action of the refrigeration fan.

[0192] In the embodiment of the present application, the damper mechanism 30 uses a memory metal spring 300 to sense the change in air temperature in the evaporation chamber 15 and stretch or shorten along the axial direction of the memory metal spring 300, driving the damper 200 to move relative to the air duct component 100, thereby achieving shielding and opening of the air inlet 111. No additional component drivers and auxiliary devices are required, which not only makes the structure of the damper mechanism simple and reliable, but also helps to reduce the cost of the damper mechanism.

[0193] In other embodiments of the present application, the memory metal spring 300 is made of a one-way memory metal. Among them, a one-way shape memory alloy can "remember" a shape at a specific temperature. For example, when the one-way shape memory alloy is cooled to below its phase transition temperature, it can be plastically deformed; when the temperature rises to the phase transition temperature, the one-way shape memory alloy will return to a preset shape.

[0194] In some embodiments, the memory metal spring 300 has a first state and a second state, and the expansion force of the memory metal spring 300 in the first state is greater than the expansion force in the second state. For example, the expansion force of the memory metal spring 300 in the first state is more than three times the expansion force of the memory metal spring 300 in the second state. Taking the memory metal spring 300 as a coil spring as an example, the first state of the memory metal spring 300 is an extended state, and the second state of the memory metal spring 300 is a contracted state.

[0195] For example, when the evaporator is defrosting, the memory metal spring 300 senses that the air temperature of the evaporation chamber has increased, and the memory metal spring 300 stretches to the first state. When the evaporator is cooling, the memory metal spring 300 senses that the air temperature of the evaporation chamber has decreased, and the expansion force of the memory metal spring 300 decreases, and it contracts under the action of other forces to the second state.

[0196] In some embodiments of the present application, when the memory metal spring 300 is in a contracted state, two adjacent coils thereof are in contact with each other, so that the memory metal spring 300 is in a densely compressed state.

[0197] Combination Figures 17 to 20 In some embodiments, the damper mechanism 30 may further include: a biasing elastic member 400, which is configured to elastically expand and contract along a first direction, and the first direction is parallel to the axial direction of the air inlet 111. The biasing elastic member 400 is respectively connected to the damper 200 and the air duct rear cover plate 110 of the air duct component 100. One end of the biasing elastic member 400 connected to the air duct component 100 is fixed, and when the biasing elastic member 400 is elastically deformed, it drives the damper 200 to move relative to the air duct component 100.

[0198] The biasing elastic member 400 is configured to elastically deform when the memory metal spring 300 is deformed to the first state, and is configured to restore the deformation when the memory metal spring 300 is deformed to the second state. Taking the biasing elastic member 400 as a coil spring as an example, the biasing elastic member 400 is configured to be compressed or stretched during the process of the memory metal spring 300 being deformed to the first state; and the biasing elastic member 400 restores the deformation when the memory metal spring 300 is deformed to the second state.

[0199] exist Fig.10 and Fig.12 In the figure, the biasing elastic member 400 is shown as a cylindrical coil spring, but this is not restrictive. The biasing elastic member 400 can also be a conical coil spring. The biasing elastic member 400 can also be other elastic members that can be stretched and retracted along the first direction.

[0200] Exemplarily, the biasing elastic member 400 is a metal coil spring, such as a stainless steel coil spring.

[0201] The combined force of the memory metal spring 300 and the biasing elastic member 400 drives the damper 200 to move along the axial direction of the air inlet 111. At this time, the damper 200 is subjected to the combined force of the memory metal spring 300 and the biasing elastic member 400. With such a configuration, the damper 200 can open and close the air inlet 111 with a small stroke. In particular, when opening the air inlet 111, the damper 200 moves along the axial direction of the air inlet 111 with a small stroke to open the air inlet 111.

[0202] In some embodiments of the present application, the damper mechanism 30 is provided with a biasing elastic member 400, and utilizes the combined force of the biasing elastic member 400 and the memory metal spring 300 to drive the damper 200 to move, thereby realizing the shielding and opening of the air inlet 111. The biasing elastic member 400 provides additional force for the opening of the damper 200, which helps to increase the opening speed of the damper 200, making the damper 200 more sensitive.

[0203] Combination Fig.17 and Fig.18When the evaporator is defrosted, the memory metal spring 300 is configured to drive the biasing elastic member 400 to deform, and drive the damper 200 to move toward the air inlet 111 to shield the air inlet 111. For example, when the evaporator is defrosted, under the action of the heater, the air temperature in the evaporation chamber rises, and the hot air rises. The memory metal spring 300 senses the increase in the air temperature in the evaporation chamber, undergoes a phase change, and stretches. The memory metal spring 300 drives the biasing elastic member 400 to deform elastically, drives the damper 200 to move toward the air duct component 100, and abuts against the air duct rear cover 110 of the air duct component 100 to shield the air inlet 111.

[0204] At this time, the elastic force of the memory metal spring 300 is greater than the elastic force of the biasing elastic member 400, so that the biasing elastic member 400 is elastically deformed. The elastic force of the memory metal spring 300 is opposite to the elastic force of the biasing elastic member 400, and the combined force F1 of the elastic force of the memory metal spring 300 and the elastic force of the biasing elastic member 400 is directed toward the air duct rear cover plate 110, and the combined force F1 overcomes the friction force of the damper 200, driving the damper 200 to move toward the air duct rear cover plate 110 to cover the air inlet 111.

[0205] Combination Fig.19 and Fig. 20 When the evaporator is cooling, the expansion force of the memory metal spring 300 becomes smaller, and the biasing elastic member 400 loses its force. The biasing elastic member 400 is configured to restore the deformation, drive the memory metal spring 300 to deform, and drive the damper 200 to move away from the air inlet 111 to open the air inlet 111. Exemplarily, when the evaporator is cooling, the air temperature in the evaporation chamber decreases under the action of the evaporator. The memory metal spring 300 senses the decrease in the air temperature in the evaporation chamber and undergoes a phase change. The elastic force of the memory metal spring 300 decreases, contracts under the action of the biasing elastic member 400, and drives the damper 200 to move away from the air duct component 100, so that a gap is formed between the damper 200 and the air duct rear cover 110, and the air inlet 111 is opened. In this way, the cold air in the evaporation chamber can enter the storage compartment through the air duct 101 and the air supply port under the action of the refrigeration fan.

[0206] At this time, the elastic force of the memory metal spring 300 is less than the elastic force of the biasing elastic member 400, and the biasing elastic member 400 recovers its deformation. The elastic force of the memory metal spring 300 is opposite to the elastic force of the biasing elastic member 400, and the combined force F2 of the elastic force of the memory metal spring 300 and the elastic force of the biasing elastic member 400 is away from the air duct rear cover plate 110 and toward the rear side wall of the box liner, and the combined force F2 overcomes the friction force of the damper 200, driving the damper 200 to move toward the rear side wall of the box liner to open the air inlet 111.

[0207] exist Fig.18When the evaporator is defrosting, the memory metal spring 300 stretches, driving the biasing elastic member 400 to be compressed and elastically deformed, driving the damper 200 to close the air inlet 111. Fig. 20 , the biasing elastic member 400 recovers the deformation and stretches, and drives the memory metal spring 300 to contract, driving the damper 200 to open the air inlet 111. The memory metal spring 300 and the biasing elastic member 400 are respectively located on both sides of the damper 200 along the axial direction of the air inlet 111. In this embodiment, along the depth direction of the refrigerator, the memory metal spring 300 is located at the rear side of the biasing elastic member 400, which can make the memory metal spring 300 exposed in the evaporation chamber, so as to facilitate the perception of the air temperature change in the evaporation chamber, and also make the biasing elastic member 400 hidden in the closed chamber formed by the air duct rear cover 110 and the damper 200 when the evaporator is cooling, so as to reduce the possibility of the biasing elastic member 400 freezing.

[0208] This is not a limitation of the biasing elastic member 400. In some possible implementations, the memory metal spring 300 is extended, driving the biasing elastic member 400 to stretch and elastically deform.

[0209] Specific reference Figure 21 to Figure 24 When the evaporator is defrosting, Fig.21 and Fig. 22 As shown, the memory metal spring 300 stretches, driving the biasing elastic member 400 to be stretched and elastically deformed, driving the damper 200 to close the air inlet 111. When the evaporator is cooling, as shown in FIG. Fig.23 and Fig.24 As shown, the biasing elastic member 400 recovers the deformation and contracts, and drives the memory metal spring 300 to contract, driving the damper 200 to open the air inlet 111. In this embodiment, the two ends of the biasing elastic member 400 are fixedly connected to the damper 200 and the air duct rear cover 110 through fixing members.

[0210] When the memory metal spring 300 deforms and drives the biasing elastic member 400 to be compressed, along the depth direction of the refrigerator, the memory metal spring 300 is closer to the evaporation chamber than the biasing elastic member 400, so that the memory metal spring 300 is located on the rear side of the biasing elastic member 400. Such a setting can be conducive to setting up a simple structure, so that the memory metal spring 300 has a larger area exposed to the evaporation chamber, so as to improve the sensitivity of the memory metal spring 300 to sensing the changes in the air temperature of the evaporation chamber.

[0211] Of course, this is not a limitation on the positions of the memory metal spring 300 and the biasing elastic member 400. In some practicable manners, along the depth direction of the refrigerator, the memory metal spring 300 is located in front of the biasing elastic member 400. By providing a hollow structure, the memory metal spring 300 is still exposed to the evaporation chamber 15 at least partially in the contracted state to sense the change in the air temperature of the evaporation chamber.

[0212] Combination Fig.25 The memory metal spring 300 and the biasing elastic member 400 are arranged at intervals along the circumference of the air inlet 111, so that the projections of the memory metal spring 300 and the biasing elastic member 400 on the plane where the air inlet 111 is located do not overlap. This arrangement makes the arrangement space of the memory metal spring 300 and the biasing elastic member 400 sufficient and the connection structure simple.

[0213] The biasing elastic member 400 and the memory metal spring 300 are both coil springs, and the axial direction of the biasing elastic member 400 is parallel to the axial direction of the memory metal spring 300. Exemplarily, the axial direction of the biasing elastic member 400 and the axial direction of the memory metal spring 300 are both parallel to the depth direction of the refrigerator.

[0214] The biasing elastic member 400 is arranged non-coaxially with the memory metal spring 300. It can be understood that the biasing elastic member 400 and the memory metal spring 300 are spaced apart along the circumference of the damper 200. Along the circumference of the damper 200, the angle A between the adjacent biasing elastic members 400 and the memory metal spring 300 satisfies 0°<A<180°. Fig.25 In the orientation, the angle A between adjacent biasing elastic members 400 and memory metal springs 300 is 90°.

[0215] Through the above arrangement, the elastic force of the biasing elastic member 400 and the elastic force of the memory metal spring 300 are parallel in direction, so as to form a combined force to drive the damper 200 to move. The biasing elastic member 400 and the memory metal spring 300 are staggered along the axial direction of the damper 200, so that the connection structure of the biasing elastic member 400 and the memory metal spring 300 is simpler and more stable. The damper 200 is driven to move by the combined force of the biasing elastic member 400 and the memory metal spring 300, and the elastic force of the biasing elastic member 400 is not affected by temperature changes, which helps to improve the opening and closing sensitivity of the damper 200, thereby helping to improve the defrosting efficiency of the evaporator and reduce the temperature rise of the storage compartment.

[0216] In some embodiments, a plurality of biasing elastic members 400 are provided, and the plurality of biasing elastic members 400 are evenly spaced along the circumference of the damper 200 , which can improve the uniformity of the force exerted by the biasing elastic member 400 in the circumferential direction of the damper 200 .

[0217] In some embodiments, in combination Figure 25 to Figure 27 There are two memory metal springs 300 , the two memory metal springs 300 are at the same level, and the two memory metal springs 300 are evenly spaced along the circumference of the damper 200 . In this way, the two memory metal springs 300 are arranged along the horizontal center line of the damper 200 .

[0218] There are multiple biasing elastic members 400, and the multiple biasing elastic members 400 are symmetrically arranged about the connection line of the two memory metal springs 300. Such an arrangement can make the damper 200 balanced in force on both sides of the connection line of the two memory metal springs 300, reduce the deflection moment of the damper 200, reduce the deformation of the damper 200, and improve the smoothness of the movement of the damper 200.

[0219] Combination Fig.28 and Fig.29 In some embodiments, a plurality of biasing elastic members 400 are provided, and the plurality of biasing elastic members 400 are symmetrically arranged along the vertical center line V of the damper 200. Such an arrangement can make the damper 200 receive balanced forces on both sides of the vertical center line V, reduce the deflection moment received by the damper 200, reduce the deformation of the damper 200, and improve the smoothness of the movement of the damper 200.

[0220] In some embodiments, reference Fig.25 , the number of the biasing elastic members 400 and the number of the memory metal springs 300 are the same.

[0221] In other embodiments, referring to Fig.28 and Fig.29 , the numbers of the biasing elastic members 400 and the memory metal springs 300 are different.

[0222] In some specific implementations, combined with Fig.26 , two biasing elastic members 400 and two memory metal springs 300 are respectively provided, and the two memory metal springs 300 are arranged at intervals along the horizontal center line H of the damper 200 and are arranged symmetrically about the vertical center line V. The two biasing elastic members 400 are arranged at intervals along the vertical center line V of the damper 200 and are arranged symmetrically about the horizontal center line H. In this way, the damper 200 is subjected to balanced forces on the horizontal center line H and the vertical center line V at the same time; it is avoided that too many biasing elastic members 400 and memory metal springs 300 are provided, which leads to a complex structure of the damper mechanism 30 and increased costs.

[0223] In some possible embodiments, combined with Fig.26The two biasing elastic members 400 and the two memory metal springs 300 are arranged at intervals along the same circumferential direction of the damper 200, and the center of the circumference coincides with the center O of the damper 200. In this way, the biasing elastic member 400 has a first interval between the projection center of the side of the damper 200 and the center O of the damper 200, and the memory metal spring 300 has a second interval between the projection center of the side of the damper 200 and the center O of the damper 200, and the second interval is equal to the first interval. In this way, the position where the elastic force of the biasing elastic member 400 acts on the damper 200 and the position where the elastic force of the memory metal spring 300 acts on the damper 200 are in the same circumference, which helps to improve the balance of the force on the damper 200 and improve the smoothness of the movement of the damper 200. Moreover, it is conducive to forming the same connection structure on the damper 200, which is connected to the biasing elastic member 400 and the memory metal spring 300 respectively, improving the symmetry of the structure of the damper 200, and facilitating processing and installation.

[0224] Reference Fig.30 In some embodiments of the present application, the biasing elastic member 400 is located on a side of the memory metal spring 300 away from the center of the damper 200 .

[0225] The number of the biasing elastic members 400 is consistent with the number of the memory metal springs 300. Such a configuration helps to improve the uniformity of the force applied to the damper 200.

[0226] The embodiment of the present application is configured such that, relative to the circumferential spacing between the biasing elastic member 400 and the memory metal spring 300 along the damper 200, the biasing elastic member 400 is located on the side of the memory metal spring 300 away from the center O of the damper 200. This can make the spacing between the biasing elastic member 400 and the memory metal spring 300 in the plane where the air inlet 111 is located smaller, thereby reducing the shear force between the biasing elastic member 400 and the memory metal spring 300 and reducing the possibility of deformation of the damper 200.

[0227] Reference Figures 17 to 20 , Fig.31 In some embodiments of the present application, the memory metal spring 300 and the biasing elastic member 400 are arranged side by side along the axial direction of the air inlet 111, so that the projections of the memory metal spring 300 and the biasing elastic member 400 on the plane where the air inlet 111 is located overlap, so that the force of the memory metal spring 300 on the damper 200 and the force of the shielding member on the damper 200 are relatively small in the plane where the air inlet 111 is located, or even overlap. In this way, the forces of the memory metal spring 300 and the biasing elastic member 400 can be concentrated, the torque caused by the interval between the two forces can be reduced, the possibility of deformation and tilting of the damper 200 can be reduced, and the smoothness of the movement of the damper 200 can be improved.

[0228] Exemplarily, the phase change temperature range of the memory metal spring 300 is T1-T2, wherein T2>T1.

[0229] When the temperature sensed by the memory metal spring 300 is lower than T1, the memory metal spring 300 is in a stable contracted state. The combined force of the memory metal spring 300 and the biasing elastic member 400 deviates from the air duct rear cover 110, such as Figure 7 and Figure 8 At this time, the damper 200 opens the air inlet 111, and the evaporator 40 is in a cooling state.

[0230] When the temperature sensed by the memory metal spring 300 is greater than or equal to T1, the memory metal spring 300 begins to deform due to the heat. As the temperature gradually rises to T2, the memory metal spring 300 is in a final elongated state.

[0231] When the temperature sensed by the memory metal spring 300 is greater than T2, the memory metal spring 300 is stabilized in the lengthened state. The combined force of the memory metal spring 300 and the biasing elastic member 400 is directed toward the rear cover plate 110 of the air duct, as shown in FIG. Figure 5 and Figure 6 At this time, the damper 200 shields the air inlet 111, and the evaporator 40 is in a defrosting state.

[0232] The phase change temperature difference ΔT of the memory metal spring 300 is equal to |T2-T1|, and the phase change temperature difference ΔT should meet the preset temperature value, such as 8°C, 5°C, etc. The temperature difference ΔT here is the minimum temperature difference that meets the motion stroke. When ΔT is greater than or equal to the preset temperature value, the motion stroke of the damper 200 caused by the combined deformation of the memory alloy and the biasing elastic member is greater than or equal to the shortest distance that the damper 200 does not affect normal ventilation; when ΔT is less than the preset temperature value, the motion stroke of the damper 200 caused by the combined deformation of the memory alloy spring and the biasing elastic member is less than the shortest distance that the damper 200 does not affect normal ventilation, and the air inlet 111 cannot be completely covered, affecting the shielding effect.

[0233] Combination Fig.25 , Fig.32a and Figure 32b , the memory metal spring 300 and the biasing elastic member 400 are not arranged coaxially, the two memory metal springs 300 are arranged on the left and right sides of the damper 200, and the two biasing elastic members 400 are arranged on the upper and lower sides of the damper 200. When the damper 200 covers the air inlet 111, the memory metal spring 300 and the biasing elastic member 400 act on the damper 200 at different positions, resulting in uneven force on the damper and a large deformation of the damper 200. The large deformation of the damper 200 increases the friction between the memory metal spring 300 and the guide component, and between the biasing elastic member 400 and the guide component, resulting in a risk of jamming or even damage.

[0234] Combination Fig.31 , Fig.33a and Figure 33b The memory metal spring 300 and the biasing elastic member 400 are coaxially arranged, and the force of the memory metal spring 300 on the damper 200 and the force of the biasing elastic member 400 on the damper 200 are relatively close to each other in the plane where the air inlet 111 is located, or even overlap, and there is no torque between the two forces. In this way, the forces of the memory metal spring 300 and the biasing elastic member 400 can be concentrated, the torque caused by the interval between the two forces can be reduced, the possibility of deformation and tilting of the damper 200 can be reduced, and the smoothness of the movement of the damper 200 can be improved.

[0235] Combination Fig.31 The coaxially arranged memory metal spring 300 and the biasing elastic member 400 are combined to form an elastic driving assembly 50 .

[0236] A plurality of elastic drive assemblies 50 are provided, and the plurality of elastic drive assemblies 50 are evenly spaced apart along the circumference of the damper 200 .

[0237] In this way, the provision of multiple elastic drive components 50 can provide sufficient power for the damper 200 and improve the moving speed of the damper 200. The multiple elastic drive components 50 are evenly spaced along the circumference of the damper 200, which is conducive to improving the uniformity of the circumferential force of the damper 200 and reducing the deformation and warping problems caused by the uneven force of the damper 200.

[0238] Exemplarily, two elastic drive assemblies 50 are provided, which can provide sufficient driving force for the damper 200 and avoid increasing the cost due to providing too many elastic drive assemblies 50 .

[0239] In some embodiments, the multiple elastic drive components 50 are at the same height from the bottom surface of the housing 10 in the vertical direction. This can improve the consistency of the multiple memory metal springs 300 sensing the temperature of the evaporation chamber 15, thereby improving the consistency of the deformation of the multiple elastic drive components 50, which helps to improve the smoothness of the movement of the damper 200.

[0240] Exemplarily, the two elastic drive assemblies 50 are evenly spaced apart along the circumference of the damper 200 , and the two elastic drive assemblies 50 are at the same level.

[0241] Combination Figure 25 to Figure 27 In some embodiments of the present application, the damper 200 may include: a plate body 210 , the plate body 210 being opposite to the air inlet 111 along the memory metal spring 300 . The plate body 210 is configured to open or cover the air inlet 111 .

[0242] The plate body 210 may be circular and match the shape of the air inlet 111 , which can not only ensure the reliability of shielding the air inlet 111 , but also avoid setting an overly large plate body 210 that increases the weight and affects the smoothness of the movement of the damper 200 . The plate body 210 is the main body of the damper 200 .

[0243] Combination Fig.26 and Fig. 27 In some embodiments, the damper 200 forms an annular matching curved surface 211 on the side facing the air inlet 111. Specifically, the plate body 210 forms a matching curved surface 211 on the side facing the air inlet 111. When the evaporator is defrosted, the matching curved surface 211 is matched and abutted with the air duct rear cover plate 110 at the edge of the air inlet 111 to shield the air inlet 111. In this way, a curved contact surface is formed between the damper 200 and the air duct rear cover plate 110, which helps to improve the reliability of the damper 200 shielding the air inlet 111.

[0244] In some embodiments of the present application, a side of the air duct rear cover plate 110 facing the damper 200, or a side of the air duct rear cover plate 110 facing away from the air duct front cover plate 120, is structured to form an annular protrusion 112, and the air inlet 111 is located inside the annular protrusion 112. The protrusion 112 is provided to improve the structural strength and stability around the air inlet 111, and reduce the possibility of deformation of the edge of the air inlet 111.

[0245] A concave matching curved surface 211 is formed on the plate body 210 , and the matching curved surface 211 cooperates with the protrusion 112 , so that a curved contact surface is formed between the damper 200 and the air duct rear cover 110 , which helps to improve the airtightness of the damper 200 in shielding the air inlet 111 .

[0246] In some embodiments, continue to refer to Fig.11 The damper 200 may further include a first connection seat 220, which is disposed at the edge of the plate body 210. The first connection seat 220 is used to install the memory metal spring 300, and the number of the first connection seat 220 may be the same as the number of the memory metal spring 300.

[0247] Reference Fig.17 and Fig.18 When the biasing elastic member 400 is coaxially arranged with the memory metal spring 300 , the first connecting seat 220 also provides a mounting and limiting structure for the biasing elastic member 400 .

[0248] Combination Fig.30 The first connection seat 220 extends away from the plate body 210 for a long distance, so that the biasing elastic member 400 can be installed on the side of the memory metal spring 300 away from the center of the plate body 210 using the first connection seat 220. In this way, the biasing elastic member 400 does not need to be additionally provided with a connection structure, which is conducive to simplifying the structure of the damper 200.

[0249] Reference Fig.25 When the biasing elastic member 400 and the memory metal spring 300 are arranged at intervals along the circumference of the plate body 210, the damper 200 may further include a second connection seat 250, which is disposed at the edge of the plate body 210. The second connection seat 250 is used to install the biasing elastic member 400, and the number of the second connection seat 250 may be the same as the biasing elastic member 400.

[0250] The shape of the second connecting seat 250 may be consistent with the shape of the first connecting seat 220 , so as to improve the symmetry of the damper mechanism 30 and facilitate processing and installation.

[0251] Continue to refer to Fig.25 In some embodiments of the present invention, the damper 200 may further include a reinforcing rib 260, which is disposed on the side of the plate body 210 away from the air inlet 111, that is, the reinforcing rib 260 is located on the side of the plate body 210 away from the matching curved surface. Such a configuration is conducive to improving the structural strength of the damper 200 and reducing the possibility of deformation of the damper 200.

[0252] The reinforcing ribs 260 may have various forms, for example, a cross shape, a mesh shape, etc.

[0253] In some specific implementations, a plurality of first connection seats 220 and a plurality of second connection seats 250 are evenly spaced along the circumference of the plate body 210, and the number of the first connection seats 220 and the number of the second connection seats 250 are even numbers. A plurality of reinforcing ribs 260 are provided, some of the reinforcing ribs 260 extend along the first direction, and some of the reinforcing ribs 260 extend along the second direction, and the first direction intersects with the second direction. The first connection seats 220 are arranged on both sides of the reinforcing ribs 260 extending along the first direction, and the second connection seats 250 are arranged on both sides of the reinforcing ribs 260 extending along the second direction. In this way, reinforcing ribs 260 are arranged between two first connection seats 220 separated by 180°, and between two second connection seats 250 separated by 180°, in the force direction of the damper 200, which helps to better improve the structural strength of the damper 200.

[0254] Exemplarily, two first connection seats 220 and two second connection seats 250 are provided, respectively, and the line connecting the two first connection seats 220 is perpendicular to the line connecting the two second connection seats 250. Two reinforcing ribs 260 are provided, and the extension directions of the two reinforcing ribs 260 are perpendicular.

[0255] In some embodiments, the reinforcing rib 260 may also be disposed on the side of the plate body 210 facing the air inlet 111 , and the provision of the reinforcing rib 260 does not affect the matching between the matching curved surface and the rear cover of the air duct.

[0256] In some embodiments, edges of the plate body 210 , the first connection seat 220 , and the second connection seat 250 may be provided with flanges 270 , and the flanges 270 are located on a side of the plate body 210 away from the air inlet 111 to further improve the structural strength of the damper 200 .

[0257] In some embodiments, in combination Fig.11 A first guide structure 230 is provided between the damper 200 and the duct rear cover plate 110 of the duct component 100 . The extension direction of the first guide structure 230 is consistent with the moving direction of the damper 200 . The first guide structure 230 is used to provide guidance and restriction for the deformation of the memory metal spring 300 .

[0258] Under the restriction of the first guide structure 230 on the memory metal spring 300, the memory metal spring 300 deforms in a set direction, so that the deformation force of the memory metal spring 300 acts as much as possible on the movement of the damper 200, reducing other losses of the deformation force of the memory metal spring 300.

[0259] When the memory metal spring 300 is a coil spring, the first guide structure 230 extends along the axial direction of the memory metal spring 300 .

[0260] like Fig.11 As shown, the first guide structure 230 is connected to the first connection seat 220 of the damper 200. The first guide structure 230 is located on a side of the first connection seat 220 facing the rear cover plate 110 of the air duct.

[0261] Exemplarily, the first guide structure 230 , the first connecting seat 220 and the plate body 210 are an integrally formed one-piece component. Such a configuration is beneficial to improving the structural strength and stability of the damper 200 , and can also simplify the structure of the damper 200 .

[0262] In some embodiments, the memory metal spring 300 is a coil spring, and the memory metal spring 300 is sleeved on the outside of the first guide structure 230 , or the first guide structure 230 is disposed on the outside of the memory metal spring 300 , both of which can provide guidance for the telescopic deformation of the memory metal spring 300 .

[0263] The memory metal spring 300 is sleeved on the outside of the first guide structure 230, and the first guide structure 230 is located on the inside of the memory metal spring 300, so that at least part of the memory metal spring 300 is exposed to the evaporation chamber, which helps the memory metal spring 300 sense the temperature change of the evaporation chamber. Moreover, when the radial dimensions of the memory metal spring 300 are consistent, the first guide structure 230 is arranged on the inside of the memory metal spring 300, which can make the structure more compact.

[0264] The first guide structure 230 is arranged on the outside of the memory metal spring 300, so that the memory metal spring 300 is located on the inside of the first guide structure 230, which plays a certain protective role for the memory metal spring 300; moreover, the first guide structure 230 is located on the outside of the memory metal spring 300, which can provide better radial manufacturing and reduce lateral bending of the memory metal spring 300 during telescopic deformation.

[0265] Continue to refer to Fig.11 In some embodiments, the air duct component 100 is formed with a receiving groove 113 , which opens toward the damper 200 . The receiving groove 113 extends along the axial direction of the air inlet 111 .

[0266] Exemplarily, a portion of the air duct rear cover plate 110 is recessed toward the air duct front cover plate 120 to form a receiving groove 113 , so as to avoid providing an opening in the air duct rear cover plate 110 to affect the airtightness of the air duct 101 .

[0267] In this embodiment, at least part of the first guide structure 230 is located in the receiving groove 113. The receiving groove 113 cooperates with the first guide structure 230 to not only guide the movement of the damper 200, but also provide a receiving space for the deformation of the memory metal spring 300.

[0268] Combination Figure 10 to Figure 11 The first guide structure 230 is constructed to form a guide cavity 2301 , and the memory metal spring 300 is accommodated in the guide cavity 2301 .

[0269] When the memory metal spring 300 is a coil spring, the guide cavity 2301 extends along the axial direction of the coil spring to provide guidance and limitation for the deformation of the memory metal spring 300 .

[0270] When the memory metal spring 300 is a cylindrical helical spring, the guide cavity 2301 is a cylindrical cavity that matches the shape of the memory metal spring 300 to ensure radial restriction of the memory metal spring 300 .

[0271] In the embodiment of the present application, a guide cavity 2301 is formed in the first guide structure 230 , so that the memory metal spring 300 is accommodated in the guide cavity 2301 , which plays a certain protective role on the memory metal spring 300 .

[0272] In some embodiments of the present application, the memory metal spring 300 has two ends along its axial direction, and one end of the memory metal spring 300 is connected to the first guide structure 230 to realize the connection between the memory metal spring 300 and the damper 200. The other end of the memory metal spring 300 is connected to the air duct rear cover plate 110 to realize the connection between the memory metal spring 300 and the air duct component 100. When the memory metal spring 300 is deformed, the end of the memory metal spring 300 connected to the air duct rear cover plate 110 does not move, and the end of the memory metal spring 300 connected to the first guide structure 230 moves, thereby driving the damper 200 to move.

[0273] Combination Figures 3 to 5 In some embodiments, one end of the memory metal spring 300 is connected to one end of the first guide structure 230 away from the first connection seat 220. Exemplarily, one end of the memory metal spring 300 is connected to the first guide structure 230 via a first connector 232. The connection method between the first connector 232 and the first guide structure 230 includes but is not limited to threaded connection, clamping, etc. The first connector 232 and the memory metal spring 300 are clamped, abutted, etc.

[0274] The other end of the memory metal spring 300 is connected to the air duct rear cover 110. Fig.10 and Fig.11 As shown, a fixing seat 114 is provided on one side of the air duct component 100 facing the damper 200, and the memory metal spring 300 is connected to the air duct rear cover plate 110 via the fixing seat 114. There are many ways to connect the memory metal spring 300 to the fixing seat 114.

[0275] For example, a limiting structure 1141 is disposed on the fixing seat 114 , so that one end of the memory metal spring 300 abuts against the limiting structure 1141 , and the structure is simple.

[0276] For another example, the damper 200 may further include a clamping piece, which passes through one end of the memory metal spring 300 , and the clamping piece is clamped or plugged with the fixing seat 114 , and the connection method is simple.

[0277] For another example, the end of the memory metal spring 300 is riveted with a connector, and the damper 200 may also include a fixing member, which is fixedly connected to the fixing seat 114 so that the riveted connector at the end of the memory metal spring 300 is clamped between the fixing member and the fixing seat 114, and the connection method is stable.

[0278] In some specific implementations, the fixing seat 114 includes two fixing parts 1144 arranged at intervals, and the two fixing parts 1144 are respectively provided with insertion holes. The damper 200 may also include an insertion strip, which is inserted into the insertion hole and passes through the spring coil of the memory metal spring 300. The connection method is simple and reliable.

[0279] exist Figures 3 to 5 as well as Fig.10 , Fig.11 In the illustrated structure, the first guide structure 230 is configured to form a guide cavity 2301 , but this is not a limitation of the first guide structure 230 . For example, the first guide structure 230 may also be columnar, so that the memory metal spring 300 is sleeved on the outside of the first guide structure 230 .

[0280] In the above embodiment, the first guide structure 230 is connected to the first connection seat 220. In other embodiments, the first guide structure 230 is disposed on the side of the air duct component 100 facing the damper 200. The first guide structure 230 may be disposed on the side of the air duct rear cover plate 110 facing the damper 200.

[0281] Combination Figure 25 to Figure 27 , the columnar first guide column 116 is provided on the air duct rear cover plate 110 as an example for description, and the first guide column 116 constitutes a first guide structure.

[0282] The first guide column 116 extends along the axial direction of the air inlet 111. The first guide column 116 may be cylindrical, matching the shape of the memory metal spring 300. Exemplarily, the first guide column 116 may be a hollow column with a small mass.

[0283] A first matching hole 221 is provided at the edge of the damper 200 , and the first matching hole 221 matches with the first guide post 116 .

[0284] In some embodiments of the present application, the first matching hole 221 may be a waist-shaped hole, and the extending direction of the waist-shaped hole is consistent with the connecting direction of the two memory metal springs 300. In this way, a radial deformation gap can be provided for the memory metal spring 300, and a space can also be provided for assembly error and processing error, so as to avoid the first guide column 116 and the first matching hole 221 from having too large abutment force and affecting the smoothness of the movement of the damper 200.

[0285] The memory metal spring 300 is located on a side of the first connection seat 220 away from the air duct component 100 , which is beneficial for the memory metal spring 300 to be exposed to the evaporation chamber 15 , so as to improve the sensitivity of the memory metal spring 300 to sense the temperature change of the evaporation chamber 15 .

[0286] The memory metal spring 300 is a coil spring and is sleeved on the outer side of the first guide column 116. The memory metal spring 300 has two ends extending along its axial direction. One end of the memory metal spring 300 is connected to the first connecting seat 220, and the other end of the memory metal spring 300 is connected to the end of the first guide column 116 away from the air duct component 100. When the memory metal spring 300 senses the change in the air temperature of the evaporation chamber and stretches or contracts, the end of the memory metal spring 300 connected to the first connecting seat 220 moves relative to the air duct component 100 to drive the damper 200 to move relative to the air duct component 100.

[0287] In the embodiment of the present application, the first guide post 116 is provided on the air duct component 100, so that the memory metal spring 300 is sleeved on the first guide post 116, which can not only guide and limit the deformation of the memory metal spring 300, but also allow the memory metal spring 300 to be exposed to the evaporation chamber 15 to sense the temperature, which helps to improve the sensitivity of the damper mechanism 30. The cooperation between the first guide post 116 and the first matching hole 221 can provide guidance for the movement of the damper 200 and reduce the possibility of the damper 200 getting stuck.

[0288] In some embodiments, the fixing seat 114 is located outside the first guide post 116. The memory metal spring 300 is connected to the fixing seat 114, so that the memory metal spring 300 is indirectly connected to the first guide post 116 through the fixing seat 114.

[0289] In other embodiments, in combination Figures 17 to 20 The memory metal spring 300 is directly connected to the first guide column 116. Exemplarily, a limiter 115 is provided at one end of the first guide column 116 away from the air duct rear cover plate 110, and the memory metal spring 300 abuts against the limiter 115 to achieve the connection between the memory metal spring 300 and the first guide column 116.

[0290] The stopper 115 can be clamped or threaded with the first guide column 116. The projection of the stopper 115 in the cross section protrudes from the projection of the memory metal spring 300 in the cross section, so that one end of the memory metal spring 300 can abut against the stopper 115. The cross section is a plane perpendicular to the extension direction of the first guide column 116.

[0291] In some embodiments of the present application, the memory metal spring 300 abuts against the first connection seat 220, and the connection method is simple and reliable. The memory metal spring 300 protrudes from the first matching hole 221 along its axial direction toward the first connection seat 220, so that the memory metal spring abuts against the first connection seat 220.

[0292] In some embodiments of the present application, a second guide structure is arranged between the damper 200 and the duct rear cover plate 110 of the duct component 100, and the extension direction of the second guide structure is consistent with the movement direction of the damper 200. The second guide structure is used to provide guidance and restriction for the deformation of the biasing elastic member 400.

[0293] Under the restriction of the second guide structure on the biasing elastic member 400, the biasing elastic member 400 deforms in a set direction, so that the deformation force of the biasing elastic member 400 acts as much as possible on the movement of the damper 200, reducing other losses of the deformation force of the biasing elastic member 400.

[0294] When the biasing elastic member 400 is a coil spring, the second guide structure extends along the axial direction of the biasing elastic member 400 .

[0295] Continue to refer to Figures 17 to 20 When the biasing elastic member 400 and the memory metal spring 300 are coaxially arranged, the biasing elastic member 400 and the memory metal spring 300 share a guide structure.

[0296] The biasing elastic member 400 is a coil spring and is sleeved on the outer side of the first guide column 116. The biasing elastic member 400 and the memory metal spring 300 are respectively located on both sides of the damper 200.

[0297] The memory metal spring 300 and the biasing elastic member 400 are guided by the same first guide column 116 , which is beneficial to improve the overlap between the action positions of the memory metal spring 300 and the biasing elastic member 400 .

[0298] The memory metal spring 300 is located on the side of the first connection seat 220 away from the air duct component 100, and the biasing elastic member 400 is located on the side of the first connection seat 220 facing the air duct component 100, so that the memory metal spring 300 and the biasing elastic member 400 transmit the force through the first connection seat 220. The memory metal spring 300 and the biasing elastic member 400 are respectively located on both sides of the first connection seat 220 along the axial direction of the air inlet 111, so that the combined force of the memory metal spring 300 and the biasing elastic member 400 acts on the first connection seat 220, so that the combined force of the two is concentrated, the loss of the combined force of the two is reduced, and it is beneficial to improve the smoothness of the movement of the damper 200.

[0299] In some embodiments, the air duct rear cover plate 110 is recessed away from the damper 200 to form an accommodating groove 113 for accommodating the biasing elastic member 400. The accommodating groove 113 extends along the axial direction of the air inlet 111. At least a portion of the biasing elastic member 400 is accommodated in the accommodating groove 113. The first guide column 116 is disposed on the groove bottom wall of the accommodating groove 113. Along the extension direction of the accommodating groove 113, the groove bottom wall of the accommodating groove 113 is opposite to the open end of the accommodating groove 113.

[0300] In this way, the first guide column 116 and the receiving groove 113 can guide and limit the elastic deformation of the biasing elastic member 400, reduce the possibility of radial deformation or skewness of the biasing elastic member 400, and make the axial deformation of the biasing elastic member 400 act as much as possible on the movement of the damper 200. In addition, the receiving groove 113 can provide a receiving space and a deformation space for the memory metal spring 300, which helps to reduce the structure of the damper mechanism protruding from the rear cover plate 110 of the air duct, so that the damper mechanism can be installed in the limited space on the rear side of the rear cover plate 110 of the air duct.

[0301] Combination Fig.31 When the biasing elastic member 400 and the memory metal spring 300 are coaxially arranged and two sets of biasing elastic members 400 and memory metal springs 300 are provided, the damper 200 has two first connection seats 220. In some embodiments, the damper 200 may further include a third connection seat 280, which is provided at the edge of the plate body 210 and is provided with a third matching hole.

[0302] The third connection seat 280, the first connection seat 220 and the plate body 210 are an integrally formed one-piece, and the structure is stable and reliable.

[0303] Combination Figures 3 to 8 A third guide post 119 is disposed on one side of the air duct component 100 facing the damper 200 , and the third guide post 119 is passed through the third matching hole. The third guide post 119 extends along the axial direction of the damper 200 .

[0304] The third guide column 119 cooperates with the third matching hole to guide the movement of the damper 200, thereby improving the directionality of the movement of the damper 200. Moreover, a third connecting seat 280 and two first connecting seats 220 form a triangular structure, making the structure of the damper 200 more stable.

[0305] Continue to refer to Figure 25 to Figure 27 When the biasing elastic member 400 and the memory metal spring 300 are arranged non-coaxially, the biasing elastic member 400 is independently guided by the second guide structure. Taking the second guide column 118 provided on the air duct component 100 as an example, the second guide column 118 is the second guide structure.

[0306] The damper 200 may further include a second connection seat 250, which is disposed at the edge of the plate body 210 and is provided with a second matching hole 251. The second connection seat 250 is used to install the biasing elastic member 400, and the number of the second connection seat 250 may be the same as that of the biasing elastic member 400.

[0307] The air duct rear cover plate 110 of the air duct component is provided with a second guide post 118 , and the second guide post 118 is passed through the second matching hole 251 . The second guide post 118 extends along the axial direction of the air inlet 111 .

[0308] In some embodiments, the second matching hole 251 may be a circular hole, which matches with the cylindrical second guide column 118 to guide the movement of the damper 200 .

[0309] When the biasing elastic member 400 is a coil spring, the biasing elastic member 400 is sleeved on the outer side of the second guide column 118 to provide guidance for the elastic deformation of the biasing elastic member 400 .

[0310] In some embodiments, the biasing elastic member 400 is located on the side of the second connection seat 250 facing the rear cover plate 110 of the air duct, and at this time, the biasing elastic member 400 is configured to be compressed under the action of the memory metal spring 300. The biasing elastic member 400 is connected to the second connection seat 250 and the rear cover plate 110 of the air duct respectively, and one end of the biasing elastic member 400 and the rear cover plate 110 of the air duct is stationary. When the biasing elastic member 400 is elastically deformed, the end of the biasing elastic member 400 connected to the second connection seat 250 moves to drive the damper 200 to move.

[0311] In the embodiment of the present application, the biasing elastic member 400 is located on the side of the second connecting seat 250 facing the air duct rear cover 110, which helps to use the second connecting seat 250 to shield the biasing elastic member 400, reduce the possibility of the biasing elastic member 400 being exposed in the evaporation chamber during defrosting, reduce the possibility of water droplets adhering to the biasing elastic member 400, and further reduce the possibility of frosting on the biasing elastic member 400.

[0312] In other embodiments, referring to Figure 21 to Figure 24 The biasing elastic member 400 is located at a side of the second connection seat 250 away from the rear cover plate 110 of the air duct. At this time, the biasing elastic member 400 is configured to be stretched under the action of the memory metal spring 300. The biasing elastic member 400 is respectively connected to the second connection seat 250 and the end of the second guide column 118 away from the rear cover plate 110 of the air duct. The end of the biasing elastic member 400 connected to the second guide column 118 is stationary. When the biasing elastic member 400 is elastically deformed, the end of the biasing elastic member 400 connected to the second connection seat 250 moves to drive the damper 200 to move.

[0313] In some embodiments, reference Figure 25 to Figure 27The air duct rear cover plate 110 is recessed away from the damper 200 to form a receiving groove 113 for receiving the biasing elastic member 400. The receiving groove 113 extends along the axial direction of the air inlet 111. The receiving groove 113 opens toward the damper 200. One end of the second guide column 118 is connected to the groove bottom wall of the receiving groove 113, and the other end of the second guide column 118 passes through the second matching hole 251. Along the extension direction of the receiving groove 113, the groove bottom wall of the receiving groove 113 is opposite to the open end of the receiving groove 113.

[0314] The two ends of the biasing elastic member 400 are respectively in contact with the second connection seat 250 and the bottom wall of the accommodating groove 113, so as to realize the connection between the biasing elastic member 400 and the damper 200 and the air duct rear cover plate 110, and the connection method is simple.

[0315] Continue to refer to Figure 25 to Figure 27 One end of the biasing elastic member 400 abuts against the bottom wall of the receiving groove 113 to realize the connection between the biasing elastic member 400 and the air duct rear cover 110; the other end of the biasing elastic member 400 abuts against the second connecting seat 250 to realize the connection between the biasing elastic member 400 and the damper 200. In this way, when the biasing elastic member 400 is elastically deformed, the damper 200 is driven to move. Moreover, the abutment between the two ends of the biasing elastic member 400 makes the connection structure of the biasing elastic member 400 simple and easy to assemble.

[0316] When the second guide column 118 is connected to the bottom wall of the receiving groove 113, the second guide column 118 and the receiving groove 113 can both guide and limit the elastic deformation of the biasing elastic member 400. At this time, the second guide structure includes the second guide column 118 and the receiving groove 113, and the receiving groove 113 can provide a receiving space for the biasing elastic member 400.

[0317] In some possible implementations, the second guide structure may include only a second guide column, for example Figure 21 to Figure 24 The structure shown.

[0318] In some other possible implementations, the second guide structure may also include only the accommodating groove 113, and the accommodating groove 113 is used to limit and guide the axial elastic deformation of the biasing elastic member 400. In order to ensure that the biasing elastic member 400 can still be restricted and guided by the accommodating groove 113 when restoring the deformation, the second connecting seat 250 may be provided with a protruding column, which is inserted into the accommodating groove 113 and connected to the end of the biasing elastic member 400.

[0319] In some possible implementations of the present application, the second guide structure may also be disposed on the second connection seat 250, and the second guide structure is a hollow structure, so as to be sleeved on the outside of the biasing elastic member 400; or, the biasing elastic member 400 is sleeved on the outside of the second guide structure. One end of the biasing elastic member 400 is connected to the second guide structure to achieve the connection between the biasing elastic member 400 and the damper 200; the other end of the biasing elastic member 400 is connected to the air duct rear cover plate 110.

[0320] In some embodiments of the present application, reference Figures 2 to 5 Since the memory metal spring 300 needs to sense the change in air temperature in the evaporation chamber 15 and deform, at least a portion of the memory metal spring 300 is exposed outside the evaporation chamber 15, thereby increasing the sensitivity of the memory metal spring 300 in sensing temperature changes.

[0321] The entire memory metal spring 300 is exposed outside the evaporation chamber 15 , so that the entire memory metal spring 300 can sense the change in air temperature in the evaporation chamber 15 and deform, thereby increasing the deformation force of the memory metal spring 300 and further increasing the moving speed of the damper 200 .

[0322] It can be understood that at least part of the memory metal spring 300 is exposed in the evaporation chamber 15 , and at least part of the memory metal spring 300 exposed in the evaporation chamber 15 can directly contact the air in the evaporation chamber 15 to sense the change of the temperature of the evaporation chamber 15 .

[0323] At least a portion of the memory metal spring 300 may be directly exposed to the evaporation chamber 15, so that the memory metal spring 300 is directly in contact with the temperature in the evaporation chamber 15. Alternatively, a channel is provided in the evaporation chamber 15 to guide the air in the evaporation chamber 15 to at least a portion of the memory metal spring 300, so that the air in the evaporation chamber 15 is in contact with the memory metal spring 300.

[0324] In some embodiments, at least a portion of the guide structure 230 is exposed to the evaporation chamber 15; at least a portion of the memory metal spring 300 is arranged outside the portion of the guide structure 230 exposed to the evaporation chamber 15. In this way, it is helpful to set a simple structure so that the memory metal spring 300 can be exposed to the evaporation chamber 15.

[0325] Combination Figure 3 and Fig.11 In some embodiments, the memory metal spring 300 is accommodated in the guide cavity 2301. Figure 34 to Figure 36 The guide structure 230 is also constructed to form a hollow portion 231 communicating with the guide cavity 2301 , so that the memory metal spring 300 is exposed to the evaporation cavity through the hollow portion 231 .

[0326] The hollow portion 231 is disposed at a portion of the guide structure 230 exposed in the evaporation chamber 15 .

[0327] The hollow portion 231 may be an opening or a hole provided in the cavity wall of the guide cavity 2301 .

[0328] It can be understood that the provision of the hollow portion 231 does not affect the guidance and restriction of the deformation of the memory metal spring 300 by the guide structure 230 .

[0329] In the embodiment of the present application, a guide cavity 2301 is formed in the guide structure 230, so that the memory metal spring 300 is accommodated in the guide cavity 2301, thereby providing a certain degree of protection for the memory metal spring 300; and a hollow portion 231 is provided in the guide structure 230 so that the memory metal spring 300 is exposed outside the evaporation cavity 15, thereby ensuring that the guide structure 230 guides the deformation of the memory metal spring 300 and at least part of the memory metal spring 300 is exposed outside the evaporation cavity 15, thereby ensuring that the memory metal spring 300 deforms upon sensing the temperature change of the evaporation cavity 15.

[0330] Continue to refer to Figure 5 and Fig.34 In some embodiments of the present application, the guide structure 230 is structured to form a first opening 2311 that is in communication with the guide cavity 2301, and the first opening 2311 is located at one end of the guide structure 230 away from the air duct component 100; the hollow portion 231 includes the first opening 2311. The first opening 2311 is located at one end of the extension direction of the guide cavity 2301. By providing the first opening 2311 at the end of the guide structure 230, it is not only convenient to install the memory metal spring 300 in the guide cavity 2301, but also the memory metal spring 300 can be exposed to the evaporation cavity through the first opening 2311.

[0331] The first opening 2311 may be a circular opening, and the diameter of the first opening 2311 is the same as the diameter of the guide cavity 2301 , so as to facilitate the installation of the memory metal spring 300 .

[0332] The first opening 2311 is disposed at one end of the guide structure 230 located in the evaporation chamber, so that the memory metal spring 300 can directly contact the air temperature change in the evaporation chamber through the first opening 2311 , and the structure is simple.

[0333] In other embodiments of the present application, the guide structure 230 is configured to form a second opening 2312 that is in communication with the guide cavity 2301, and the second opening 2312 is located at one end of the guide structure 230 that faces the air duct component 100; the hollow portion 231 includes the second opening 2312. The second opening 2312 is located at the other end of the extension direction of the guide cavity 2301, and the second opening 2312 and the first opening 2311 are respectively located at the two ends of the extension direction of the guide cavity 2301.

[0334] The second opening 2312 may be a circular opening, and the diameter of the second opening 2312 is the same as the diameter of the guide cavity 2301 , so as to facilitate the installation of the memory metal spring 300 .

[0335] By providing the second opening 2312 at the other end of the guide cavity 2301, the memory metal spring 300 can also be exposed to the evaporation cavity 15 through the second opening 2312, which is beneficial to increase the exposed area of ​​the memory metal spring 300 and improve the sensitivity of the memory metal spring 300 to sense temperature. Moreover, the second opening 2312 is opposite to the first opening 2311, so that the guide cavity 2301 forms a channel connected to the evaporation cavity 15, and the air in the evaporation cavity 15 can flow in the guide cavity 2301 through the first opening 2311 and the second opening 2312, which is beneficial for the memory metal spring 300 in the guide cavity 2301 to contact with the air in the evaporation cavity 15 and sense temperature changes.

[0336] Combination Fig.35 and Fig.36 In some other embodiments of the present application, the guide structure 230 is further constructed to form a third opening 2313 communicating with the guide cavity 2301 , and the third opening 2313 is located on the side of the guide cavity 2301 ; the hollow portion 231 includes the third opening 2313 .

[0337] The third opening 2313 is located on the side of the extending direction of the guide cavity 2301. In this way, the third opening 2313 has sufficient space to provide an opening for the memory metal spring 300 in the guide cavity 2301 to directly contact the air of the evaporation cavity 15.

[0338] like Fig.35 As shown, the third opening 2313 may be a long strip-shaped opening extending along the extension direction of the guide cavity 2301 , providing a larger contact area for the memory metal spring 300 in the guide cavity 2301 .

[0339] A plurality of third openings 2313 may be provided, and the plurality of third openings 2313 may be arranged at intervals along the circumference of the guide cavity 2301 to increase the opening area.

[0340] like Fig.37As shown, the opening area of ​​the third opening 2313 is relatively small. For example, the third opening 2313 is an arc-shaped gap extending along the circumference of the guide cavity 2301. There are multiple third openings 2313, and the multiple third openings 2313 are arranged at intervals along the extension direction of the guide cavity 2301. In this way, a larger contact area can be provided for the memory metal in the guide cavity 2301, and the guiding effect of the guide cavity 2301 on the deformation of the memory metal spring 300 can also be ensured. Multiple third openings 2313 arranged at intervals along the extension direction of the guide cavity 2301 form a group of openings, and multiple groups of openings, such as two groups, can be set along the circumference of the guide cavity 2301.

[0341] Combination Fig.10 and Fig.11 The fixing seat 114 is configured to form a receiving channel 1142, and the receiving channel 1142 is configured to receive at least a portion of the guide structure 230. The receiving channel 1142 is opposite to and communicates with the receiving groove 113 along the axial direction of the air inlet 111.

[0342] Combination Fig.11 and Fig.37 In some embodiments, a fourth opening 1143 is disposed on the side wall of the fixing seat 114 , so that the memory metal spring 300 is exposed to the evaporation chamber 15 through the fourth opening 1143 .

[0343] When the third opening 2313 is disposed on the side of the guide structure 230, at least part of the third opening 2313 and at least part of the fourth opening 1143 are opposite to each other along the radial direction of the guide cavity 2301. In this way, the setting of the fixing seat 114 does not affect the air contact between the memory metal spring 300 and the evaporation cavity 15.

[0344] In the embodiment of the present application, the third opening 2313 and the fourth opening 1143 are opposite to each other along the radial direction of the guide cavity 2301 , so as to avoid that part of the third opening 2313 is blocked by the fixing seat 114 and affects the air contact between the memory metal spring 300 and the evaporation cavity 15 .

[0345] In some specific implementations, the fixing seat 114 includes two fixing portions 1144, which are opposite to each other along the radial direction of the receiving groove 113, and an accommodating channel 1142 is formed between the two fixing portions 1144. The two fixing portions 1144 are spaced apart along the axial direction of the receiving groove 113 to form a fourth opening 1143.

[0346] In some embodiments of the present application, reference Figures 17 to 20When the damper 200 shields the air inlet 111, the biasing elastic member 400 is located in the closed cavity 1131 enclosed by the damper 200 and the air duct rear cover plate 110 of the damper 200. Such a configuration can prevent the biasing elastic member 400 from being isolated from the evaporation cavity 15 during defrosting and not being exposed to the evaporation cavity 15, thereby preventing the biasing elastic member 400 from contacting the hot and humid air and condensing water droplets, ensuring the smoothness of the elastic deformation of the biasing elastic member 400, and helping to improve the reliability and stability of the operation of the damper mechanism 30.

[0347] Furthermore, the closed cavity 1131 can also limit and guide the elastic deformation direction of the biasing elastic member 400 , thereby reducing the possibility of radial deformation of the biasing elastic member 400 , so that the axial elastic force of the biasing elastic member 400 can act on the damper 200 as much as possible.

[0348] In some embodiments, the edge of the damper 200 is configured to form a groove portion, and the opening of the groove portion faces the air duct rear cover plate 110. When the damper 200 shields the air inlet 111, the groove portion is located outside the air inlet 111, so that the groove portion provided on the edge of the damper 200 does not affect the shielding function of the damper 200. When the damper 200 shields the air inlet 111, the groove portion and the air duct rear cover plate 110 enclose a closed cavity 1131 to accommodate the biasing elastic member 400.

[0349] In other embodiments, in combination Figures 17 to 20 , the duct rear cover plate 110 of the duct component 100 is structured to form a receiving groove 113. When the damper 200 shields the air inlet 111, the receiving groove 113 and the damper 200 are enclosed to form a closed cavity 1131 to accommodate the biasing elastic member 400. In this way, when the damper 200 abuts against the duct rear cover plate 110 and shields the air inlet 111, the receiving groove 113 is closed to form a closed cavity 1131. The structure of the damper 200 can be simplified, and the receiving groove 113 is formed when the duct rear cover plate 110 is integrally formed, without the need for additional processing.

[0350] Combination Fig.17 and Fig.18 When the damper 200 covers the air inlet 111 , the biasing elastic member 400 is elastically compressed, and the biasing elastic member 400 is accommodated in the closed cavity 1131 , isolating the biasing elastic member 400 and the evaporation cavity 15 , thereby preventing the biasing elastic member 400 from contacting the hot and humid air in the evaporation cavity 15 .

[0351] Combination Fig.19 and Fig. 20 When the evaporator is defrosted, the expansion force of the memory metal spring 300 decreases, the biasing elastic member 400 recovers its deformation, a portion of the biasing elastic member 400 is located in the accommodating groove 113, and another portion of the biasing elastic member 400 extends out of the outside of the accommodating groove 113.

[0352] In the scheme where the biasing elastic member 400 and the memory metal spring 300 are coaxially arranged, when the damper 200 shields the air inlet 111, the first connecting seat 220 of the damper 200 shields the notch of the accommodating groove 113 to form a closed cavity 1131, as shown in FIG. Figures 17 to 20 .

[0353] When the damper 200 shields the air inlet 111, the first connection seat 220 abuts against the air duct component 100 to close the accommodating groove 113 and form a closed cavity 1131. The first connection seat 220 abuts against the air duct rear cover plate 110 of the air duct component 100 to close the accommodating groove 113 and form a closed cavity 1131. The damper 200 does not need to be additionally provided with a structure for closing the accommodating groove 113, which is conducive to simplifying the structure of the damper 200. In this way, the damper 200 of the embodiment of the present application is provided with the first connection seat 220, which can not only be connected with the biasing elastic member 400 to realize the connection between the biasing elastic member 400 and the damper 200, but also can use the first connection seat 220 to close the accommodating groove 113 and form a closed cavity 1131.

[0354] Taking the first connection seat 220 closing the accommodating groove 113 as an example, the first connection seat 220 is structured to form an abutting surface, which abuts against the air duct component 100. The first connection seat 220 forms an abutting surface on one side facing the air duct component 100, and the abutting surface abuts against the air duct rear cover plate 110 of the air duct component 100, so that the first connection seat 220 forms a surface contact with the air duct rear cover plate 110 around the accommodating groove 113, which helps to improve the sealing performance of the closed cavity 1131.

[0355] In the scheme where the biasing elastic member 400 and the memory metal spring 300 are arranged non-coaxially, when the damper 200 shields the air inlet 111, the second connecting seat 250 of the damper 200 shields the notch of the accommodating groove 113 to form a closed cavity 1131, as shown in FIG. Figure 25 to Figure 27 The damper 200 of the embodiment of the present application can be connected to the biasing elastic member 400 by providing the second connecting seat 250 to achieve the connection between the biasing elastic member 400 and the damper 200, and the second connecting seat 250 can also be used to close the accommodating groove 113 to form a closed cavity 1131, which helps to simplify the structure of the damper 200.

[0356] In some embodiments, a portion of the air duct rear cover 110 is recessed toward the back of the air duct 101 to form a receiving groove 113. Fig. 27 , the groove wall of the receiving groove 113 forms a protruding piece 1132 in the air duct 101. In this way, the receiving groove 113 is not connected to the air duct 101, so as to avoid affecting the relative airtightness of the air duct 101.

[0357] The dimension of the protruding piece 1132 along the depth direction of the refrigerator is smaller than the dimension of the air duct 101 along the depth direction of the refrigerator, so that the protruding piece 1132 is located in the air duct 101 without affecting the air duct front cover plate 120 on the front side of the air duct 101 .

[0358] When the protruding member 1132 extends along the axial direction of the air inlet 111, the extending length of the protruding member 1132 is smaller than the dimension of the air duct 101 along the depth direction of the refrigerator.

[0359] In some embodiments of the present application, Figures 38 to 40 The memory metal spring 300 is a coil spring. When the damper 200 covers the air inlet 111, the memory metal spring 300 has an elongated length Lj1 along its axial direction, and the biasing elastic member 400 has a second deformation length along its axial direction.

[0360] Combination Figure 41 to Figure 43 When the damper 200 opens the air inlet 111, the memory metal spring 300 has a contraction length Lj2 along its axial direction; the biasing elastic member 400 has a first deformation length along its axial direction.

[0361] In some embodiments of the present application, Lj2≤Lj1−LLb; Lb is the required distance between the rear side of the air duct component 100 and the damper 200 to meet the air volume requirement of the air inlet 111 .

[0362] It can be understood that the difference between the extended length of the memory metal spring 300 and the contracted length of the memory metal spring 300 is greater than or equal to the required distance between the rear side of the air duct component 100 and the damper 200 required for the air volume of the air inlet 111, so that the deformation length of the memory metal spring 300 is greater than or equal to the preset distance between the rear side of the air duct component 100 and the damper 200 required for the air volume of the air inlet 111, ensuring that the air volume requirement of the air inlet 111 is met when the damper 200 is opened, and ensuring that the air duct 101 has sufficient air intake.

[0363] When the damper 200 covers the air inlet 111 , the elongated length Lj1 of the memory metal spring 300 may be equal to the distance between the damper 200 and the rear side wall 12 of the casing 11 .

[0364] Combination Fig.40 and Fig.43 , the biasing elastic member 400 is a coil spring. When the damper 200 covers the air inlet 111, the memory metal spring 300 drives the biasing elastic member 400 to compress and deform. When the damper 200 opens the air inlet 111, the biasing elastic member 400 recovers its deformation and drives the memory metal spring 300 to contract, so that the biasing elastic member 400 has a first deformation length along its axial direction, and the first deformation length is less than the natural length of the biasing elastic member 400. The second deformation length is less than the first deformation length.

[0365] In the embodiment of the present application, when the damper 200 opens the air inlet 111, the biasing elastic member 400 is in a compressed elastic deformation state, not a free state. In this way, under the elastic force of the biasing elastic member 400, the damper 200 is forced to be kept open, so as to prevent the damper 200 from being affected by cold wind and moving relative to the air duct rear cover 110, thereby affecting the cold wind from entering the storage compartment.

[0366] Combination Fig.40 When the damper 200 covers the air inlet 111, the biasing elastic member 400 does not protrude from one end of the notch of the receiving groove 113. When the biasing elastic member 400 is elastically compressed, the biasing elastic member 400 can be completely located in the receiving groove 113 and abut against the groove bottom wall of the receiving groove 113 and the damper 200, respectively, so that the second deformation length of the biasing elastic member 400 is equal to the extension length of the receiving groove 113.

[0367] Combination Figure 21 to Figure 24 In other implementations, when the damper 200 covers the air inlet 111 , the memory metal spring 300 stretches and deforms, driving the biasing elastic member 400 to stretch and deform.

[0368] Combination Fig.23 and Fig.24 When the damper 200 opens the air inlet 111, the biasing elastic member 400 recovers its deformation and drives the memory metal spring 300 to contract; the biasing elastic member 400 has a third deformation length along its axial direction, and the third deformation length is greater than the natural length of the biasing elastic member 400.

[0369] Combination Fig.21 and Fig. 22 When the damper 200 covers the air inlet 111 , the biasing elastic member 400 has a fourth deformation length along its axial direction.

[0370] Combination Fig.23 and Fig.24 When the damper 200 opens the air inlet 111, the biasing elastic member 400 has a third deformation length along its axial direction. The third deformation length is smaller than the fourth deformation length.

[0371] The third deformation length is greater than the natural length of the biasing elastic member 400. In the embodiment of the present application, when the damper 200 opens the air inlet 111, the biasing elastic member 400 is in a stretched elastic deformation state, not a free state. In this way, under the elastic force of the biasing elastic member 400, the damper 200 is forced to be kept open, so as to prevent the damper 200 from being moved relative to the air duct rear cover 110 by the cold wind and affecting the cold wind from entering the storage compartment.

[0372] In this embodiment, the biasing elastic member 400 is fixedly connected to the damper 200 and the air duct rear cover plate 110 via additional fixing members.

[0373] In the above embodiment, one end of the memory metal spring 300 is fixed relative to the air duct rear cover plate 110, which is equivalent to the damper 200 being installed on the air duct rear cover plate 110 through the memory metal spring 300. When the biasing elastic member 400 is provided, one end of the biasing elastic member 400 is fixed relative to the air duct rear cover plate 110.

[0374] In some other embodiments of the present application, one end of the memory metal spring 300 can be fixed relative to the box 11, so that one end of the memory metal spring 300 is fixedly connected to the rear side wall 12 of the box 11, so that the damper mechanism 30 is installed on the box 11.

[0375] In some specific implementations, a mounting plate is provided on the rear side wall 12 of the box 11, and the damper mechanism 30 is installed on the mounting plate to improve the stability and strength of the installation of the damper mechanism 30. The mounting plate can be provided on the inner side of the rear side wall 12, so that the mounting plate is directly connected to the damper mechanism 30, and does not affect the insulation structure between the box 11 and the box shell. The mounting plate can be provided on the outer side of the rear side wall 12 facing the box shell, and the damper mechanism 30 passes through the opening provided on the rear side wall 12 and is connected to the mounting plate.

[0376] Among them, one end of the memory metal spring 300 and the biasing elastic member 400 are fixed on the mounting plate, which not only allows the memory metal spring 300 to be located in the evaporation chamber 15, responding quickly and with high sensitivity; but also, the setting of the mounting plate can improve the connection reliability and reduce the possibility of local thermal deformation of the box.

[0377] In the above embodiment, the memory metal spring 300 and the biasing elastic member 400 are both located on the side of the air inlet 111, and at least two memory metal springs 300 are provided to ensure the balance of force on the damper 200. However, this is not restrictive. In some embodiments, one memory metal spring 300 is provided, and in order to ensure the balance of force on the damper 200, one memory metal spring 300 is provided at the center of the damper 200.

[0378] Combination Fig.44 In some embodiments of the present application, the damper mechanism 30 may further include a base 500, which is fixed on the rear cover plate 110 of the air duct, and there is a gap between the base 500 and the rear cover plate 110 of the air duct along the axial direction of the air inlet 111, so that the memory metal spring 300 and the damper 200 can be installed in the gap.

[0379] One end of the memory metal spring 300 is fixedly connected to the base 500, and the other end of the memory metal spring 300 is connected to the damper 200. When the memory metal spring 300 senses temperature changes and deforms, the end of the memory metal spring 300 connected to the base 500 remains stationary, driving the damper 200 to move relative to the air duct rear cover 110.

[0380] The memory metal spring 300 is located at the center of the damper 200. One memory metal spring 300 can be used to drive the damper 200 to move, thereby reducing costs. It can also avoid deformation and jamming of the damper 200 caused by inconsistency in deformation between multiple memory metal springs 300, thereby making the movement of the damper 200 smoother. In this case, the memory metal spring 300 can be made of a two-way memory metal.

[0381] In order to limit and guide the deformation of the memory metal spring 300 , a third guide structure 510 is provided on a side of the base 500 facing the damper 200 . The third guide structure 510 extends along the axial direction of the air inlet 111 .

[0382] The third guide structure 510 may be cylindrical so as to be sleeved on the outside of the memory metal spring 300. Of course, a hollow portion may be provided on the cylindrical third guide structure 510 so that the memory metal spring 300 is exposed in the evaporation chamber and can sense the temperature more sensitively.

[0383] The third guide structure 510 may be columnar, so that the memory metal spring 300 is sleeved on the outside of the third guide structure 510 . In this way, the memory metal spring is exposed to the evaporation chamber, which is conducive to sensing the air temperature change in the evaporation chamber.

[0384] A matching recess 290 is provided on the damper 200 . The matching recess 290 matches with the third guide structure 510 . On the one hand, it can connect the damper 200 , and on the other hand, it can guide the movement of the damper 200 .

[0385] When the evaporator is defrosted, the memory metal spring 300 stretches, driving the damper 200 to move away from the base 500 to cover the air inlet 111. At this time, the third guide structure 510 slides outward from the matching recessed portion 290.

[0386] When the evaporator is cooling, the memory metal spring 300 contracts, driving the damper 200 to move toward the base 500 to open the air inlet 111. At this time, the third guide structure 510 slides inwardly toward the matching recessed portion 290.

[0387] The mating recessed portion 290 may be a groove opening toward the base 500 , which helps to ensure the relative sealing of the damper 200 in shielding the air inlet 111 .

[0388] Continue to refer to Fig.44In some embodiments, a guide assembly 520 is provided between the edge of the damper 200 and the rear cover plate 110 of the air duct to guide and limit the moving direction of the damper 200 .

[0389] The guide assembly 520 includes a fourth guide column 521 and a matching portion 522. The fourth guide column 521 extends along the axial direction of the air inlet 111. One of the fourth guide column 521 and the matching portion 522 is disposed on the edge of the damper 200, and the other is disposed on the air duct rear cover plate 110. The movement direction of the damper 200 is limited by the matching of the fourth guide column 521 and the matching portion 522.

[0390] Exemplarily, the fourth guide post 521 is disposed on a side of the air duct rear cover plate 110 facing the air door. The matching portion 522 may be a matching hole, which is disposed on an edge of the air door 200 .

[0391] Exemplarily, the fourth guide column 521 may be disposed on the damper 200 , and the matching portion 522 may be a groove disposed on the rear cover plate 110 of the air duct to avoid affecting the relative sealing of the air duct.

[0392] There may be a plurality of guide assemblies 520, which are arranged at intervals along the circumference of the air inlet 111 to improve the balance of the guiding effect of the damper 200. For example, two guide assemblies 520 are provided.

[0393] In other embodiments of the present application, the base 500 may also be fixed to the rear side wall of the box, so that the damper mechanism is installed on the box.

[0394] In some possible implementations of the present application, the memory metal spring 300 is made of a one-way memory metal. The combined force of the biasing elastic member 400 and the centrally arranged memory metal spring 300 drives the damper 200 to move. The structure and working principle of the biasing elastic member 400 can refer to the above embodiment. The biasing elastic member 400 can be coaxially arranged with the memory metal spring 300, and the biasing elastic member 400 can be non-coaxially arranged with the memory metal spring 300.

[0395] 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 it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, 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.

[0396] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are 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: include: A box body, a storage compartment and an evaporation chamber are arranged in the box body; an evaporator and a heater for defrosting the evaporator are arranged in the evaporation chamber; an air duct is arranged between the evaporation chamber and the storage compartment for cold air in the evaporation chamber to flow into the storage compartment; The air inlet of the air duct is opened in the evaporation chamber; a damper is provided at the air inlet; A memory metal spring is arranged at the air inlet, and the memory metal spring is configured to be deformed by heat when the temperature in the evaporation chamber rises, and to drive the damper to move and cover the air inlet.

2. The refrigerator according to claim 1, characterized in that: When the evaporator is cooling, the memory metal spring is configured to independently drive the damper to open the air inlet.

3. The refrigerator according to claim 1, characterized in that: The refrigerator further includes a biasing elastic member, and the combined force of the biasing elastic member and the memory metal spring drives the damper to move.

4. The refrigerator according to claim 3, characterized in that: The memory metal spring is a coil spring; and / or the biasing elastic member is a coil spring.

5. The refrigerator according to any one of claims 1 to 4, characterized in that: The refrigerator further comprises an air duct component, wherein the air duct component comprises: The rear cover plate of the air duct faces the evaporation chamber; the rear cover plate of the air duct is structured to form the air inlet; The air duct front cover plate faces the storage compartment, the air duct front cover plate is connected to the air duct rear cover plate, and encloses the air duct to form the air duct; The memory metal spring is connected to the damper and the air duct rear cover plate respectively.

6. The refrigerator according to claim 5, characterized in that: A first guide structure is provided between the damper and the rear cover plate of the air duct, and the first guide structure is configured to limit the deformation direction of the memory metal spring.

7. The refrigerator according to any one of claims 1 to 4, characterized in that: A plurality of the memory metal springs are provided, and the plurality of the memory metal springs are arranged at intervals along the circumferential direction of the air inlet.

8. The refrigerator according to any one of claims 1 to 4, characterized in that: The damper comprises: a plate body, opposite to the air inlet along the axial direction of the air inlet, the plate body being configured to open or cover the air inlet; The first connecting seat is connected to the edge of the plate body, and the first connecting seat is connected to the memory metal spring.

9. The refrigerator according to claim 8, characterized in that: The plate body forms an annular matching curved surface on one side facing the air inlet; When the evaporator is defrosted, the matching curved surface is matched and abutted against the component forming the air inlet to shield the air inlet.

10. The refrigerator according to claim 8, characterized in that: The damper further comprises a reinforcing rib, and the reinforcing rib is arranged on a side of the plate body away from the air inlet.

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