Refrigerator

Abstract

The refrigerator comprises a refrigerator body, the refrigerator body comprises a refrigerator shell and a refrigerator liner, the refrigerator liner is arranged in the refrigerator shell, a storage chamber is formed in the refrigerator liner, an evaporation cavity is formed between the storage chamber and the refrigerator shell, an evaporator and a defrosting heater are arranged in the evaporation cavity, and an air duct assembly is arranged between the evaporation cavity and the storage chamber. An air inlet and an air supply outlet are formed in the air duct assembly, the air duct assembly communicates with the evaporation cavity through the air inlet, the air duct assembly communicates with the storage chamber through the air supply outlet, and the shielding assembly is arranged in the evaporation cavity and can be unfolded or contracted to change the air inlet area of the air inlet; according to the refrigerator, the shielding assembly shields the air inlet area of the fan at the position, located on one side of the evaporator, of the air inlet of the air duct assembly, so that the evaporation cavity can form a closed chamber under the defrosting working condition, the fresh-keeping effect is improved, and the heat efficiency of the defrosting heater can be improved; the shielding assembly does not occupy the space of the air duct, does not need to compress the space of the storage chamber, is compact in structure and improves the space utilization rate of the refrigerator.

Description

Technical Field

[0001] This application relates to the technical field of low-temperature storage devices, and particularly to a refrigerator. Background Art

[0002] A refrigerator is an electrical device that can maintain a constant low temperature and can provide appropriate temperature and humidity conditions for fresh vegetables, fruits, meats and other food ingredients, thereby improving the freshness preservation effect of food. As a household appliance product with a high frequency of daily use, people not only pay attention to its refrigeration effect, but also put forward higher requirements for the freshness preservation effect and internal environment of the refrigerator.

[0003] During the defrosting process of the refrigerator, after the heater is heated, the hot air rises, and the hot air enters the freezer compartment through the air duct, resulting in an increase in the temperature of the freezer compartment and causing the food to freeze; when refrigerating, the thawed food freezes again; this periodic "thawing + freezing" will reduce the freshness preservation effect of the food and cause the food to stick to each other. At present, in order to prevent the hot air generated during the defrosting process of the refrigerator from entering the refrigeration chamber of the refrigerator, generally, the heat transfer is reduced by blocking the blower on the blower side of the air inlet.

[0004] However, setting a shielding component on the blower side of the air inlet to shield the blower will increase the size of the air duct cavity to ensure the installation of the blower, thereby compressing the usable space of the refrigerator and reducing the space utilization rate of the refrigerator. Summary of the Utility Model

[0005] In view of the above-mentioned deficiencies of the prior art, the purpose of this application is to provide a refrigerator, aiming to improve the utilization rate of the defrosting hot air of the refrigerator and enhance the defrosting efficiency.

[0006] Another object of this application can be to improve the temperature stability inside the liner during defrosting, thereby enhancing the freshness preservation effect.

[0007] Another object of this application can be to improve the space utilization rate of the refrigerator.

[0008] The problems of this application are not limited to the problems mentioned above, and those skilled in the art can clearly understand other problems not mentioned from the following descriptions.

[0009] In order to achieve the above object, this application adopts the following technical solutions:

[0010] This application discloses a refrigerator on the one hand, including:

[0011] A box body, including a box shell and a liner, the liner is arranged inside the box shell, and a storage compartment is formed inside the liner; and an evaporation cavity is formed between the box shell and the storage compartment;

[0012] An evaporator, arranged in the evaporation cavity;

[0013] A defrosting heater, disposed in the evaporation chamber;

[0014] An air duct assembly, disposed between the evaporation chamber and the storage compartment, having an air inlet and an air outlet formed therein. The air duct assembly is communicated with the evaporation chamber through the air inlet, and the air duct assembly is communicated with the storage compartment through the air outlet;

[0015] A shielding assembly, capable of expanding or contracting to change the air inlet area of the air inlet;

[0016] Wherein, the shielding assembly is disposed in the evaporation chamber.

[0017] The above technical solution has the following advantages or beneficial effects: By expanding or contracting the shielding assembly to change the air inlet area of the air inlet, the shielding assembly can shield the air inlet during the defrosting condition, preventing the hot air during defrosting from entering the storage compartment, avoiding temperature fluctuations in the storage compartment, and improving the freshness preservation effect. The shielding assembly is disposed on one side of the evaporation chamber, which can avoid the problem of compressing the refrigerator storage space by arranging the shielding assembly on the fan side, improve the structural compactness of the refrigerator, and have a high space utilization rate.

[0018] In some embodiments, the shielding assembly includes a driving member and a shielding member; the driving member is disposed on the side wall of the evaporation chamber close to the air duct assembly; the shielding member is in transmission connection with the driving member, and the shielding member can expand to shield the air inlet, and the shielding member can contract to expose the air inlet.

[0019] The above technical solution has the following advantages or beneficial effects: The driving member is disposed on the side wall close to the air duct assembly, and the shielding member is in transmission connection with the driving member, so that the shielding member can be close to the air inlet, improving the shielding effect of the shielding member on the air inlet.

[0020] In some embodiments, the shielding assembly includes a transmission mechanism, and the transmission mechanism is respectively in transmission connection with the driving member and the shielding member. The driving member can drive the transmission mechanism to rotate to drive the shielding member to expand or contract.

[0021] The above technical solution has the following advantages or beneficial effects: By driving the transmission member to rotate by the driving member, thereby driving the shielding member to expand or contract, the power is transmitted through the rotation of each component, and the transmission structure is simple and the transmission is reliable.

[0022] In some embodiments, the driving member is configured as a motor, and the motor has an output shaft;

[0023] The transmission mechanism includes a first gear, a second gear, and a winding shaft; the first gear is in transmission connection with the output shaft of the motor; the second gear meshes with the first gear; the winding shaft passes through the second gear, and the motor can drive the first gear and the second gear to rotate through the output shaft, so that the winding shaft rotates with the second gear to change the air inlet area of the air inlet.

[0024] The above technical solution has the following advantages or beneficial effects: The shielding component is driven by the meshing of the first gear and the second gear, with reliable transmission and high precision. In addition, gear transmission is suitable for a variety of different spatial layouts, reducing the layout difficulty of the shielding component in a narrow space, with a compact structure and improved space utilization.

[0025] In some embodiments, the second gear includes an internal gear or an external gear.

[0026] The above technical solution has the following advantages or beneficial effects: When the second gear is an internal gear, the first gear meshes and drives with the internal teeth of the second gear; when the second gear is an external gear, the first gear meshes and drives with the external teeth of the second gear. The arrangement method is not unique, adapting to different layout requirements.

[0027] In some embodiments, the shielding component includes a mounting box; the mounting box is arranged on the side wall of the evaporation chamber close to the air duct assembly and above the air inlet, and the mounting box is hollow.

[0028] The winding shaft includes a first end and a second end, the first end and the second end are respectively connected to two opposite side walls of the mounting box through shaft sleeves, and the second end is connected to the second gear outside the mounting box.

[0029] The above technical solution has the following advantages or beneficial effects: The mounting box is located above the air inlet, and the downward unfolding and upward winding of the shielding member are in the direction of gravity, facilitating the winding and unfolding of the shielding member. In addition, since the mounting box is arranged above the air inlet, there is no phenomenon of increasing the flow resistance along the path of the cold air, and after the shielding member is wound up, it has no influence on the air duct flow field and the refrigeration effect of the refrigerator.

[0030] In some embodiments, the bottom of the mounting box is provided with an opening, the shielding member can pass through the opening and unfold downward, or the shielding member can contract upward along the opening.

[0031] The above solution has the following advantages or beneficial effects: The bottom of the mounting box is provided with an opening, and when the shielding member unfolds, it can be closer to the air inlet, thereby improving the shielding effect of the shielding member on the air inlet.

[0032] In some embodiments, the unfolded area of the shielding member is not less than the radial area of the air inlet.

[0033] The above solution has the following advantages or beneficial effects: The unfolded area of the shielding member is not less than the radial area of the air inlet. That is, the unfolded shielding member can completely shield the air inlet, thereby preventing the hot air in the evaporation chamber from entering the air duct during the defrosting operation, and then entering the freezer and / or the refrigerator compartment through the air outlet, avoiding temperature fluctuations in the refrigerator compartment and / or the freezer compartment.

[0034] In some embodiments, the shielding member is a flexible waterproof member.

[0035] The above solution has the following advantages or beneficial effects: The flexible member can be wound up well and can be unfolded again after being wound up. Using a waterproof member for the shielding member can prevent water vapor from staying on the surface of the shielding member and avoid frosting on the surface, which affects its normal operation.

[0036] In some embodiments, the shielding member is a rolling curtain, and a waterproof layer is provided on the surface of the rolling curtain.

[0037] The above solution has the following advantages or beneficial effects: The rolling curtain material is soft or has a structure that can be wound up, is easy to be wound up, and can be unfolded smoothly after being wound up. The waterproof layer on the surface of the rolling curtain can prevent water vapor from staying on the surface of the shielding member and avoid frosting on the surface, which affects its normal operation.

[0038] In some embodiments, the shielding assembly includes a magnetic member and an electromagnetic coil; the magnetic member is disposed on the shielding member; the electromagnetic coil is disposed below the air inlet, and when the shielding member is unfolded, the magnetic member can be attracted to the electromagnetic coil.

[0039] The above solution has the following advantages or beneficial effects: Through the mutual attraction between the electromagnetic coil and the magnetic member, the lower part of the shielding member can be fixed on the magnetic member, so that the shielding member can be fully unfolded and can be closer to the air inlet, thereby improving the shielding effect of the shielding member on the air inlet.

[0040] In some embodiments, the refrigerator includes a defrosting controller and a defrosting temperature sensor; the defrosting controller is disposed inside the cabinet; the defrosting temperature sensor is disposed in the evaporation chamber and is electrically connected to the defrosting controller;

[0041] The shielding assembly includes a heating element; the heating element is disposed in the mounting box and is electrically connected to the defrosting controller.

[0042] The above solution has the following advantages or beneficial effects: The defrost controller can sense the temperature change in the evaporation chamber. The defrost controller can control the start and stop of the heating element according to the temperature information fed back by the defrost temperature sensor, so that the heating element can start to heat the environment in the installation box at a lower temperature, ensuring the normal operation of the shielding member, with relatively high control accuracy, ensuring that the shielding member can completely block the air inlet during the defrosting condition, thereby improving the defrosting effect.

[0043] In some embodiments, an installation cavity is formed on a side of the installation box facing away from the air inlet, the installation cavity protrudes in a direction away from the air inlet, and the heating wire is disposed in the installation cavity.

[0044] The above solution has the following advantages or beneficial effects: By providing the installation cavity and disposing the heating wire in the installation cavity, it can prevent the shielding member from contacting the heating wire, effectively avoiding scalding the shielding member when the heating wire generates heat. In addition, the installation cavity is disposed on the side of the installation box facing away from the air inlet, preventing the protruding installation cavity from increasing the distance between the shielding member and the air inlet, thereby affecting the sealing effect of the shielding member on the air inlet.

[0045] The effects of the present application are not limited to the above-mentioned effects. Those skilled in the art can clearly understand other effects not mentioned from the records of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic structural diagram of a refrigerator provided by an embodiment of the present application.

[0047] Figure 2 It is a schematic structural diagram of a box body provided by an embodiment of the present application.

[0048] Figure 3 It is a schematic structural diagram of an air duct assembly provided by an embodiment of the present application.

[0049] Figure 4 It is a first visual structural diagram of the shielding assembly in the unfolded state provided by an embodiment of the present application.

[0050] Figure 5 It is a second visual structural diagram of the shielding assembly in the unfolded state provided by an embodiment of the present application.

[0051] Figure 6 It is a structural diagram of the shielding assembly in the contracted state provided by an embodiment of the present application.

[0052] Figure 7 It is a structural diagram of the shielding assembly under the first visual provided by an embodiment of the present application.

[0053] Figure 8Schematic diagram of the shielding component in the second visual angle provided by an embodiment of the present application.

[0054] Figure 9 is Figure 5 A sectional view taken along the A-A direction.

[0055] Figure 10 Schematic diagram of the shielding component in the third visual angle provided by an embodiment of the present application.

[0056] Figure 11 is Figure 10 A sectional view taken along the B-B direction.

[0057] Figure 12 is Figure 9 An enlarged view of region C.

[0058] Figure 13 is Figure 9 An enlarged view of region D.

[0059] Description of main component symbols: 1, box body; 11, box shell; 12, box liner; 121, storage compartment; 1211, refrigerating chamber; 1212, freezing chamber; 13, evaporation cavity; 14, evaporator; 15, defrosting heater; 16, air duct assembly; 161, air outlet; 162a / 162b, air outlet; 163, fan; 17, shielding component; 171, driving member; 1711, output shaft; 172, shielding member; 173, transmission mechanism; 1731, first gear; 1732, second gear; 1733, winding shaft; 17331, first end; 17332, second end; 174, mounting box; 1741, opening; 1742, mounting cavity; 175a / 175b, bushing; 176, magnetic member; 177, electromagnetic coil; 178, heating element. Detailed implementation manners

[0060] The present application provides a refrigerator. To make the purpose, technical solution and effects of the present application clearer and more definite, the following further elaborates the present application with reference to the accompanying drawings and by way of examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0061] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present application. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plural" is two or more.

[0062] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" 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, an electrical connection, or a connection that allows mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0063] Figure 1 The structural schematic diagram of the refrigerator provided for the present application. Figure 2 The structural schematic diagram of the cabinet provided for the present application.

[0064] Please refer to Figure 1 and Figure 2 and, the present application provides a refrigerator, including a cabinet 1. The cabinet 1 may include a cabinet shell 11. The cabinet shell 11 is configured as the external structure of the cabinet 1. The cabinet shell 11 may be generally rectangular in shape. It can be understood that in other embodiments, the cabinet shell 11 may also adopt a hollow structure of other shapes.

[0065] In some embodiments of the present application, a storage compartment 121 may be provided inside the cabinet 1. The storage compartment 121 can be used for low-temperature storage of items to improve the freshness preservation effect of the items.

[0066] In some embodiments of the present application, a plurality of mutually separated storage compartments 121 may be provided inside the cabinet 1. Each separated storage compartment 121 may serve as an independent storage space for low-temperature storage. The storage compartment 121 may be a freezer compartment 1212. The storage compartment 121 may be a refrigerating compartment 1211. The storage compartment 121 may meet different refrigeration requirements such as freezing and refrigeration according to different types of food ingredients and store them. For example, the refrigerating compartment 1211 is suitable for storing vegetables, fruits, beverages, etc. The freezer compartment 1212 is suitable for placing meats, frozen foods, etc.

[0067] In some embodiments of the present application, to meet more usage requirements of users, the storage compartment 121 may further include a fresh-keeping drawer, a variable-temperature compartment, etc.

[0068] In some embodiments of the present application, the plurality of storage compartments 121 may be arranged in an up-and-down separated manner.

[0069] In some embodiments of the present application, the plurality of storage compartments 121 may be arranged in a left-and-right separated manner.

[0070] In some embodiments of the present application, the cabinet 1 may be provided with an inner liner 12. The inner liner 12 is disposed inside the cabinet shell 11. The interior of the inner liner 12 is hollow. The storage compartment 121 is formed inside the inner liner 12. A pick-up and placement opening is formed on the front side of the inner liner 12. Items can be placed into the corresponding storage compartment 121 through the pick-up and placement opening. It can be understood that a plurality of inner liners 12 may be provided inside the cabinet 1. One or more storage compartments 121 may be formed inside each inner liner 12.

[0071] In some embodiments of the present application, a shelf assembly (not shown in the figure) may be provided in the inner liner 12 to form a shelf space for storing items.

[0072] The shelf assembly may be detachably disposed in the inner liner 12, so that the shelf assembly can be detached from the inner liner 12 for cleaning or changing the shelf space, etc.

[0073] In some embodiments of the present application, the shelf assembly may include a shelf board (not shown in the figure). The shelf board is used for storing items. The shelf board may be provided as an integral board structure. In some other embodiments, the shelf board may also be provided as a board structure that can be folded forward and backward or left and right. Alternatively, the shelf board may be composed of a plurality of shelf rods that can be retracted or extended. By changing the distance between the shelf rods, different load-bearing planes can be formed, and different shelf spaces can be formed to adapt to the storage requirements of different items.

[0074] In some embodiments of the present application, the cabinet 1 may include a cabinet door (not shown in the figure). The cabinet door is movably disposed on the front side of the cabinet 1. The cabinet door is configured to be able to close the inner liner 12 to insulate the interior of the inner liner 12 from the outside.

[0075] In some embodiments of the present application, the box door can be a rotatable door structure. The box door is rotatably connected to one side of the box body 1 where the access opening is provided. At this time, the box door can be used as an ordinary door structure, such as a refrigeration door, a freezer door, etc.

[0076] Specifically, the box door and the box body 1 can be connected by a hinge so that the box door of the refrigerator can rotate around the axis of the hinge to open and close the refrigerator box door, and then open and close the corresponding storage compartment 121.

[0077] In some embodiments of the present application, the box door can also be a push-pull door structure. The box door is slidably arranged on the front side of the box body 1, that is, the box door can be used as a drawer door. Specifically, guide rails (not shown in the figure) are respectively arranged on the left and right inner side walls of the box liner 12, and the box door is respectively connected to the guide rails on both sides. Then, through the telescoping of the guide rails, the push-pull function of the box door is realized, and the opening and closing of the storage compartment 121 are realized.

[0078] In some embodiments of the present application, an installation space is formed between the box shell 11 and the box liner 12. The installation space can be used to form a thermal insulation layer. The thermal insulation layer can insulate the storage space inside the box body 1 from the outside.

[0079] As Figure 1 shown, in some embodiments, an evaporation chamber 13 can be formed between the box shell 11 and the storage compartment 121.

[0080] In some embodiments of the present application, an air duct assembly 16 can be formed in the installation space. The air duct assembly 16 can be arranged between the evaporation chamber 13 and the storage compartment 121. The air duct assembly 16 can be configured to separate the evaporation chamber 13 from the storage compartment 121.

[0081] In some embodiments of the present application, the air duct assembly 16 can form an air inlet 161. The air duct assembly 16 can communicate with the evaporation chamber 13 through the air inlet 161 so that the air flow between the evaporation chamber 13 and the air duct assembly 16 can circulate. The air duct assembly 16 can form air outlets 162a / 162b. The air duct assembly 16 can communicate with the storage compartment 121 through the air outlets 162a / 162b so that the air flow between the air duct assembly 16 and the storage compartment 121 can flow.

[0082] The air duct assembly 16 includes an air duct. The air duct can include a freezing air duct. The air inlet 161 can communicate the freezing air duct with the evaporation chamber 13. The freezing air duct can communicate with the freezer 1212 through the air outlet 162b.

[0083] In some embodiments, an evaporator 14 is disposed in the evaporation chamber 13. When the refrigerator refrigerates, the cold air generated by the evaporator 14 can enter the freezing air duct through the air inlet 161, and then enter the freezer 1212 through the air outlet 162b of the freezing air duct, so as to freeze the food in the freezer 1212.

[0084] Figure 3 It is a schematic structural diagram of the air duct assembly provided by the present application.

[0085] As Figure 1 and Figure 3 shown, in some embodiments, a blower 163 may be disposed in the air duct. The blower 163 is disposed in the freezing air duct. When the blower 163 operates, it can drive the cold air in the freezing air duct to flow in a preset direction. That is, the blower 163 can drive the cold air from the evaporation chamber 13 into the freezer 1212 through the freezing air duct, provide power for the flow of the cold air, and can accelerate the air flow speed between the entire air duct assembly 16 and the freezer 1212, thereby accelerating heat exchange and promoting the cooling efficiency.

[0086] In some embodiments, the air duct may include a refrigerating air duct. The refrigerating air duct is communicated with the freezing air duct. The refrigerating air duct and the refrigerating chamber 1211 may be communicated through the air outlet 162a. In this way, the cold air in the evaporator 14 can enter the refrigerating chamber 1211 through the refrigerating air duct, and then keep fresh the food in the refrigerating chamber 1211.

[0087] As Figure 1 shown, in some embodiments, a defrosting heater 15 may be disposed in the evaporation chamber 13. After the refrigerator is used for a certain period of time, frost may be generated on the evaporator 14, which may affect the normal operation of the evaporator 14. The defrosting heater 15 can be powered on and heated under the defrosting condition of the refrigerator, so that the temperature in the evaporation chamber 13 rises, the frost on the evaporator 14 melts into water, drips into the evaporation dish at the bottom of the evaporator 14, and maintains the normal operation of the evaporator 14.

[0088] In some embodiments, the defrosting heater 15 is disposed at the bottom of the evaporator 14, so that the heated air can heat the frost on the evaporator 14 during the rising process, improving the heat exchange effect. It can be understood that, in order to further improve the thermal efficiency of the defrosting heater 15, the defrosting heater 15 can be disposed as close to the evaporator 14 as possible as long as it does not affect the evaporator 14.

[0089] In some embodiments, a defrosting controller (not shown in the figure) may be disposed in the box body 1. The defrosting controller may be electrically connected to the defrosting heater 15 to control the working state of the defrosting heater 15. When the refrigerator enters the defrosting condition, the defrosting controller can control the defrosting heater 15 to work.

[0090] Figure 4 The first visual structural diagram of the unfolded state of the shielding component provided for this application. Figure 5 The second visual structural diagram of the unfolded state of the shielding component provided for this application. Figure 6 The structural diagram of the shielding component in the contracted state provided for this application.

[0091] As Figure 1 、 Figures 4 to 6 shown, in some embodiments, the box body 1 may include a shielding component 17 capable of changing the air inlet area of the air inlet 161. The shielding component 17 can be unfolded to shield the air inlet 161. The shielding component 17 can be contracted to avoid blocking the air inlet 161. By changing the air inlet area of the air inlet 161 through the shielding component 17, the air flow between the evaporation chamber 13 and the air duct assembly 16 can be blocked, so as to prevent the hot air flow in the evaporation chamber 13 from entering the storage compartment 121 through the air duct assembly 16 during the defrosting operation of the refrigerator, causing temperature fluctuations in the storage compartment 121 and thus affecting the freshness preservation effect of the food stored in the storage compartment 121.

[0092] The shielding component 17 is arranged in the evaporation chamber 13. Compared with the shielding component 17 being arranged on the side of the blower 163, the above arrangement does not require adjusting the air duct cavity, can avoid compressing the space of the storage compartment 121, improve the space utilization rate of the refrigerator, and has a compact structure, which is suitable for the design of large-capacity refrigerators.

[0093] As Figure 5 and Figure 6 shown, in some embodiments, the shielding component 17 may include a driving member 171. The driving member 171 is arranged on the side wall of the evaporation chamber 13 close to the air duct assembly 16. The driving member 171 can provide power to realize the unfolding and contraction of the shielding component 17.

[0094] In some embodiments, the driving member 171 may be configured as a motor.

[0095] As Figure 5 and Figure 6As shown, the shielding component 17 may include a shielding member 172. The shielding member 172 is in transmission connection with the driving member 171. During the defrosting operation, the driving member 171 is activated, which can drive the shielding member 172 to unfold, so that the shielding member 172 can shield the air inlet 161. In this way, the hot air in the evaporation chamber 13 can be enclosed in the evaporation chamber 13. On the one hand, the utilization rate of the hot air is improved, the defrosting efficiency is increased, and the defrosting time is saved; on the other hand, the shielding member 172 can prevent the hot air from entering the storage compartment 121 through the air outlet 162, avoiding the phenomenon of periodic thawing and defrosting, and improving the fresh-keeping effect. During the refrigeration operation, the driving member 171 is activated to drive the shielding member 172 to contract, so that the air inlet 161 is opened without any shielding. The fan 163 can send the cold air brought from the evaporation chamber 13 to the freezer compartment 1212 and / or the refrigerator compartment 1211 to complete the refrigeration work of the refrigerator.

[0096] As Figure 4 and Figure 5 shown, in some embodiments, the unfolded area of the shielding member 172 is not less than the radial area of the air inlet 161. That is, the unfolded shielding member 172 can completely shield the air inlet 161, thereby preventing the hot air in the evaporation chamber 13 from entering the air duct through the air inlet 161 during the defrosting operation, and then entering the freezer compartment 1212 and / or the refrigerator compartment 1211 through the air outlet 162, avoiding the temperature fluctuations in the refrigerator compartment 1211 and / or the freezer compartment 1212.

[0097] In some embodiments, the shielding member 172 may be a flexible member. The flexible member can be well wound and can be unfolded after being wound.

[0098] In other embodiments, the shielding member 172 may be a rolling curtain. The rolling curtain material is soft or has a woundable structure, is easy to be wound, and can be smoothly unfolded after being wound.

[0099] The shielding member 172 may be made of a waterproof material. Exemplarily, the shielding member 172 may be made of an oil-based waterproof cloth.

[0100] A waterproof layer may be provided on the surface of the shielding member 172. A waterproof coating may be applied to the surface of the shielding member 172.

[0101] The surface of the shielding member 172 has waterproof performance, which can prevent water vapor from staying on the surface of the shielding member 172 and avoid frosting on the surface, which may affect its normal operation.

[0102] Figure 7 It is a schematic structural diagram of the shielding component provided by the present application under the first view. Figure 8 It is a schematic structural diagram of the shielding component provided by the present application under the second view.

[0103] As Figures 5 to 8As shown, in some embodiments, the shielding component 17 may include a transmission mechanism 173. The transmission mechanism 173 may be respectively in transmission connection with the driving member 171 and the shielding member 172. When the driving member 171 operates, it can drive the transmission mechanism 173 to rotate, so that the transmission mechanism 173 drives the shielding member 172 to unfold or contract.

[0104] As Figure 7 and Figure 8 As shown, in some embodiments, the transmission mechanism 173 may include a first gear 1731 and a second gear 1732. The first gear 1731 and the second gear 1732 are meshed and connected. The motor includes an output shaft 1711. The first gear 1731 is sleeved on the output shaft 1711 of the motor. When the motor operates, the output shaft 1711 can drive the first gear 1731 and the second gear 1732 to rotate, realizing the transmission between the motor and the shielding member 172.

[0105] The transmission mechanism 173 may include a winding shaft 1733. The winding shaft 1733 is disposed through the second gear 1732. The upper end of the shielding member 172 is connected to the winding shaft 1733. The motor can drive the first gear 1731 and the second gear 1732 to rotate through the output shaft 1711, so that the winding shaft 1733 rotates with the second gear 1732 to change the air inlet area of the air inlet 161. When the motor operates, the output shaft 1711 drives the winding shaft 1733 to rotate through the first gear 1731 and the second gear 1732. When the winding shaft 1733 rotates, the shielding member 172 can unfold downward to gradually shield the air inlet 161, or the shielding member 172 can move upward and wind around the winding shaft 1733 to gradually open the air inlet 161.

[0106] In some embodiments, the second gear 1732 may be an internal gear. That is, the first gear 1731 and the second gear 1732 are in a mating transmission of an external gear and an internal gear, and the first gear 1731 may be disposed inside the second gear 1732.

[0107] In other embodiments, the second gear 1732 may be an external gear. The first gear 1731 is disposed outside the second gear 1732, and the first gear 1731 and the second gear 1732 are in a mating transmission of two external gears.

[0108] In the above, a gear transmission is adopted between the motor and the winding shaft 1733, and the transmission accuracy is high, which can accurately control the winding or unfolding of the shielding member 172. In addition, since the space in the evaporation chamber 13 is small, the gear transmission is suitable for a variety of different spatial layouts, reducing the difficulty of achieving accurate transmission in a narrow space.

[0109] Figure 9 For Figure 5 A cross-sectional view along the A-A direction. Figure 10Schematic diagram of the structure of the shielding component provided by this application under the third vision. Figure 11 is Figure 10 A cross-sectional view taken along the B-B direction.

[0110] As Figure 5 , Figure 6 , Figures 9 to 11 As shown in the figures, in some embodiments, the shielding component 17 includes a mounting box 174. The mounting box 174 is disposed on the side wall of the evaporation chamber 13 close to the air duct assembly 16. A mounting ear is provided on the side of the mounting box 174 facing the air duct assembly 16. The mounting box 174 is fixed to the side wall of the evaporation chamber 13 through the mounting ear.

[0111] As Figure 11 shown, the mounting box 174 is hollow. The winding shaft 1733 is fixed to the mounting box 174. The winding shaft 1733 includes a first end 17331 and a second end 17332. The transmission assembly may include 175a / 175b. The first end 17331 and the second end 17332 of the winding shaft 1733 are respectively connected to two opposite side walls of the mounting box 174 through the bushings 175a / 175b. The winding shaft 1733 can rotate relative to the bushings 175a / 175b, so that the shielding member 172 can be driven to unfold or wind up under the drive of the motor.

[0112] The second end 17332 of the winding shaft 1733 is connected to the second gear 1732 outside the mounting box 174, with less space limitation, which is convenient for the layout of the first gear 1731 and the second gear 1732.

[0113] In some embodiments, as Figure 7 shown, the bottom of the mounting box 174 is provided with an opening 1741, and the lateral length of the shielding member 172 is equivalent to the extended length of the mounting box 174. That is, the lateral length of the shielding member 172 is equivalent to the length of the opening 1741, making the structure of the shielding member 172 more compact and improving the space utilization rate of the refrigerator. In addition, the setting of the opening 1741 enables the shielding member 172 to be close to the side of the mounting box 174 facing the air duct assembly 16 when unfolded, so that the shielding member 172 can better shield the air inlet 161, improve the sealing performance of the evaporation chamber 13 during the defrosting operation, and thus improve the thermal efficiency of the defrosting heater 15 during defrosting.

[0114] In some other embodiments, the bottom of the mounting box 174 is provided with a through hole suitable for the shielding member 172 to pass through. During the process of the shielding member 172 rising and winding up or descending and unfolding, the through hole can play a certain guiding role and improve the movement stability of the shielding member 172.

[0115] Further, the via hole is formed with a flange extending downward. The flange increases the area of the side wall of the via hole, thereby increasing the contact area between the via hole and the shielding member 172, and can further improve the movement stability of the shielding member 172.

[0116] In some embodiments, the mounting box 174 is located above the air inlet 161, which is convenient for the winding and unfolding of the shielding member 172. In addition, since the mounting box 174 is arranged above the air inlet 161, there is no phenomenon of increasing the flow resistance along the cold air flow, and the shielding member 172 has no influence on the air duct flow field and the refrigeration effect of the refrigerator after being wound up.

[0117] Figure 12 For Figure 9 the enlarged view of region C.

[0118] As Figure 6 , Figure 7 and Figure 9 shown, in some embodiments, the shielding member 172 may include a magnetic member 176 and an electromagnetic coil 177. The magnetic member 176 is disposed on the shielding member 172 and is located on the side of the shielding member 172 facing the air inlet 161. The electromagnetic coil 177 may be disposed below the air inlet 161. When the shielding member 172 is unfolded, the magnetic member 176 can be attracted to the electromagnetic coil 177, so that the shielding member 172 can extend below the air inlet 161 to completely block the air inlet 161. It can be understood that the magnetic member 176 is disposed at the lower end of the shielding member 172. In this way, both the upper end and the lower end of the shielding member 172 are fixed, and the shielding member 172 can be fully unfolded to ensure the shielding effect of the shielding member 172 on the air inlet 161.

[0119] Before the defrosting operation starts, the defrosting controller controls the motor to start. The motor drives the winding shaft 1733 to rotate through the first gear 1731 and the second gear 1732. Under the action of the winding shaft 1733 and gravity, the shielding member 172 will unfold downward. At this time, the electromagnetic coil 177 is energized. After the shielding member 172 is lowered to a set distance, the magnetic member 176 will sense the magnetic field of the electromagnetic coil 177, and the magnetic member 176 will be adsorbed to the electromagnetic coil 177 to close the air inlet 161. In this way, the evaporation chamber 13 forms a closed chamber, and the defrosting operation starts. During the refrigeration operation, the defrosting controller controls the motor to reverse, disconnects the current of the electromagnetic coil 177, and under the action of the first gear 1731 and the second gear 1732, the winding shaft 1733 rotates to wind the shielding member 172 upward around the winding shaft 1733. The air inlet 161 is reopened without any obstruction, and the blower 163 can send the cold air in the evaporation chamber 13 to the refrigerator storage compartment 121 to complete the refrigeration work of the refrigerator.

[0120] Figure 13 For Figure 9 the enlarged view of region D in.

[0121] As Figure 11 and Figure 13 shown, in some embodiments, the shielding assembly 17 may include a heating element 178. The heating element 178 is disposed in the mounting box 174. The heating element 178 may include a mounting shaft and a heating wire. The heating wire is wound around the mounting shaft. The heating wire can heat the air in the mounting box 174 to prevent the shielding member 172 from frosting, ensuring that the shielding member 172 can be normally deployed or wound up.

[0122] In some embodiments, a mounting cavity 1742 may be formed on a side of the mounting box 174 facing away from the air inlet 161. The mounting cavity 1742 protrudes in a direction away from the air inlet 161. The heating wire is disposed in the mounting cavity 1742. By providing the mounting cavity 1742 and disposing the heating wire in the mounting cavity 1742, it is possible to prevent the shielding member 172 from coming into contact with the heating wire, effectively avoiding scalding the shielding member 172 when the heating wire generates heat. Especially when the shielding member 172 is made of a combustible material, it can prevent the shielding member 172 from coming into contact with the heating wire and causing potential safety hazards. In addition, the mounting cavity 1742 is disposed on a side of the mounting box 174 facing away from the air inlet 161, preventing the protruding mounting cavity 1742 from increasing the distance between the shielding member 172 and the air inlet 161, thereby affecting the sealing effect of the shielding member 172 on the air inlet 161.

[0123] In some embodiments, a defrosting temperature sensor (not shown in the figure) may be disposed in the evaporation cavity 13. The defrosting temperature sensor is configured to be able to sense the temperature change in the evaporation cavity 13. The defrosting temperature sensor is electrically connected to the defrosting controller. The heating element 178 is electrically connected to the defrosting controller. When the defrosting temperature sensor obtains that the temperature in the evaporation cavity 13 reaches Ta, the defrosting temperature sensor feeds back to the defrosting controller, and the defrosting controller controls the heating element 178 to start heating. When the defrosting temperature sensor obtains that the temperature in the evaporation cavity 13 reaches Tb, the defrosting temperature sensor feeds back to the defrosting controller, and the defrosting controller controls the heating element 178 to turn off. It can be understood that Ta is less than Tb. Ta and Tb are not limited to specific specific temperatures, and in different models of refrigerators, Ta and Tb may be defined as different temperature values.

[0124] In summary, by disposing the shielding assembly on the side of the evaporation cavity of the air inlet, the present application can avoid the problem of compressing the storage space of the refrigerator by disposing the shielding assembly on the fan side, improve the structural compactness of the refrigerator, and have a high space utilization rate. In addition, the shielding member is wound and unwound or wound up by the winding shaft, saving space and being convenient to arrange in a narrow space, and can realize the repeated opening and closing of the air duct in a narrow space, which is suitable for the design of large-capacity refrigerators. A heating element is disposed in the mounting box, and the heating element can be started or turned off according to the temperature sensed by the defrosting temperature sensor to ensure the normal operation of the shielding member.

[0125] It will be understood that those of ordinary skill in the art can make equivalent substitutions or changes based on the technical solutions of this application and its inventive concept, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A refrigerator, characterized in that, Comprising: A box body, including a box shell and a box liner, the box liner is disposed within the box shell, and a storage compartment is formed within the box liner; and an evaporation chamber is formed between the box shell and the storage compartment; An evaporator, disposed within the evaporation chamber; A defrost heater, disposed within the evaporation chamber; An air duct assembly, disposed between the evaporation chamber and the storage compartment, the air duct assembly forms an air inlet and an air outlet, the air duct assembly is in communication with the evaporation chamber through the air inlet, and the air duct assembly is in communication with the storage compartment through the air outlet; A shielding assembly, capable of expanding or contracting to change the air inlet area of the air inlet; Wherein, the shielding assembly is disposed within the evaporation chamber.

2. The refrigerator according to claim 1, characterized in that, The shielding assembly includes: A driving member, disposed on a side wall of the evaporation chamber close to the air duct assembly; A shielding member, drivingly connected to the driving member, the shielding member can expand to shield the air inlet, and the shielding member can contract to expose the air inlet.

3. The refrigerator according to claim 2, characterized in that, The shielding assembly includes: A transmission mechanism, drivingly connected to the driving member and the shielding member respectively, the driving member can drive the transmission mechanism to rotate to drive the shielding member to expand or contract.

4. The refrigerator according to claim 3, wherein The driving member is configured as a motor, and the motor has an output shaft; The transmission mechanism includes: A first gear, drivingly connected to the output shaft of the motor; A second gear, meshing with the first gear; A winding shaft, passing through the second gear, the motor can drive the first gear and the second gear to rotate through the output shaft, so that the winding shaft rotates with the second gear to change the air inlet area of the air inlet.

5. The refrigerator according to claim 4, wherein The second gear includes an internal gear or an external gear.

6. The refrigerator according to claim 4, wherein The shielding assembly includes: An installation box, disposed on a side wall of the evaporation chamber close to the air duct assembly and above the air inlet, the installation box is hollow; The winding shaft includes a first end and a second end, the first end and the second end are respectively connected to opposite side walls of the installation box through shaft sleeves, and the second end is connected to the second gear outside the installation box.

7. The refrigerator according to claim 6, wherein The bottom of the installation box is provided with an opening, the shielding member can pass through the opening and expand downward, or the shielding member can contract upward along the opening.

8. The refrigerator according to claim 6, characterized in that, The expanded area of the shielding member is not less than the radial area of the air inlet.

9. The refrigerator according to any one of claims 2 to 8, characterized in that, The shielding member is a flexible waterproof member.

10. The refrigerator according to any one of claims 2 to 8, characterized in that, The shielding member is a rolling curtain, and a waterproof layer is provided on the surface of the rolling curtain.

11. The refrigerator according to any one of claims 6 to 8, characterized in that, The shielding assembly includes: A magnetic member, disposed on the shielding member; An electromagnetic coil, disposed below the air inlet, when the shielding member expands, the magnetic member can be attracted to the electromagnetic coil.

12. The refrigerator according to any one of claims 6 to 8, wherein The refrigerator includes: A defrost controller, disposed within the box body; A defrost temperature sensor, disposed within the evaporation chamber and electrically connected to the defrost controller; The shielding assembly includes: A heating member, disposed within the installation box and electrically connected to the defrost controller.

13. The refrigerator according to claim 12, characterized in that, An installation cavity is formed on one side of the installation box facing away from the air inlet, and the installation cavity protrudes in a direction away from the air inlet, and the heating element is arranged in the installation cavity.

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