Refrigerator

Abstract

The utility model relates to the technical field of refrigeration equipment, and discloses a refrigerator which comprises an inner container and an air duct cover plate. The air duct cover plate covers the rear side wall of the inner container, a circulating air duct is defined by the air duct cover plate and the inner container, and the side wall of the air duct cover plate is provided with an air outlet communicated with the circulating air duct and a plurality of air return ports; wherein the air outlet is located above the multiple air return ports, and the multiple air return ports are distributed in the vertical direction. According to the air conditioner, air in the circulation air channel is blown into the inner container through the air outlet, air in the inner container flows into the circulation air channel through the multiple air return openings, the multiple air return openings are distributed in the vertical direction, and air in areas with different heights in the inner container flows into the circulation air channel through the air return openings corresponding to the areas; the air circulation flowing effect in the inner container is improved, the temperature of each temperature area in the inner container is more uniform, and the temperature uniformity in the refrigerator is improved.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, for example, to a refrigerator. Background Art

[0002] Currently, direct cooling freezers use the evaporator to exchange heat directly with the freezer liner. As a result, the inner wall temperature of the freezer liner is relatively low, making it prone to frost. When there is a lot of frost on the freezer liner, the cooling effect of the freezer is affected.

[0003] In the related art, there is a medical cabinet body and a medical cabinet, the box body includes an air duct plate, the air duct plate is arranged in the inner tank of the box body and forms an air duct between the inner tank, and a fan and an evaporator are arranged in the air duct; the air duct plate has a top wall and a rear wall, the top wall is provided with a plurality of air outlets connected to the air duct, and the plurality of air outlets are arranged at intervals along the circumference of the top wall, the rear wall is provided with a return air outlet connected to the air duct, and the evaporator is arranged between the return air outlet and the fan; the fan inhales cold air, and the cold air flows from the multiple air outlets on the top to the bottom of the inner tank, and the cold air absorbs heat in the process of flowing downward and flows back from the return air outlet into the air duct, and the gas flowing back into the air duct enters the evaporator, and the cold air output by the evaporator is inhaled by the fan through the air duct, thereby promoting the air flow in the inner tank and reducing the frost condensed in the inner tank.

[0004] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art:

[0005] After the cold air is blown out through the multiple air outlets on the top of the medical cabinet liner, it flows back into the air duct through the return air outlet at the bottom of the medical cabinet. The air circulation effect inside the refrigerator is poor, and there are differences in temperature at different height areas inside the refrigerator, resulting in poor temperature uniformity inside the refrigerator.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a refrigerator to improve the air circulation effect inside the refrigerator and improve the temperature uniformity inside the refrigerator.

[0009] In some embodiments, a refrigerator comprises an inner container and an air duct cover. The air duct cover is disposed on a rear side wall of the inner container and defines an outflow air duct together with the inner container. The side wall of the air duct cover is provided with an air outlet and a plurality of return air ducts connected to the inflow air duct. The air outlet is located above the plurality of return air ducts, and the plurality of return air ducts are arranged in a vertical direction.

[0010] Optionally, the multiple return air vents are evenly arranged in the vertical direction.

[0011] Optionally, each return air outlet is a long strip-shaped opening.

[0012] Optionally, the distance between the plane where the air outlet is located and the rear side wall of the inner container is greater than the distance between the plane where the multiple return air outlets are located and the rear side wall of the inner container.

[0013] Optionally, along the vertical direction, the distance between the topmost return air outlet and the bottommost return air outlet among the multiple return air outlets is greater than or equal to half the length of the rear side wall of the inner tank, and less than three quarters of the length of the rear side wall of the inner tank.

[0014] Optionally, the length of the air outlet is less than or equal to two-thirds of the length of each return air outlet, and greater than or equal to one-third of the length of each return air outlet.

[0015] Optionally, there are multiple air outlets, and each air outlet is located above the multiple return air outlets.

[0016] Optionally, a fan is provided in the air flow duct, and the air outlet end of the fan is arranged toward the air outlet.

[0017] Optionally, an evaporator coil is provided in the air flow duct, and the evaporator coil is located in an inner area of ​​the air flow duct corresponding to the multiple return air outlets.

[0018] Optionally, a heat exchange plate is provided on one side of the evaporator coil, the evaporator coil is laid on the side wall of the heat exchange plate, and the heat exchange plate is located between the evaporator coil and the multiple return air outlets.

[0019] The refrigerator provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] The air in the flow ventilation duct is blown into the inner tank through the air outlet, and the air in the inner tank then flows into the flow ventilation duct through multiple return air outlets, and the multiple return air outlets are arranged in the vertical direction. The air in different height areas of the inner tank flows into the flow ventilation duct through the return air outlets corresponding to the area, thereby improving the effect of air circulation in the inner tank, making the temperature of each temperature zone in the inner tank more uniform, and improving the temperature uniformity inside the refrigerator.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0023] Figure 1 is a structural schematic diagram of a refrigerator provided by an embodiment of the present disclosure;

[0024] Figure 2 This is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present disclosure;

[0025] Figure 3 This is a schematic diagram of the structure of an air duct cover and a snap fit provided by an embodiment of the present disclosure;

[0026] Figure 4 is a structural schematic diagram of another air duct cover provided by an embodiment of the present disclosure;

[0027] Figure 5 The embodiment of the present disclosure provides Figure 4 A in the middle is an enlarged schematic diagram;

[0028] Figure 6 is a structural schematic diagram of another air duct cover provided by an embodiment of the present disclosure;

[0029] Figure 7 is a structural schematic diagram of another air duct cover provided by an embodiment of the present disclosure;

[0030] Figure 8 This is a schematic diagram of the structure of an evaporator coil and a heat exchange plate provided by an embodiment of the present disclosure;

[0031] Figure 9 is a structural schematic diagram of another heat exchange plate provided in an embodiment of the present disclosure;

[0032] Figure 10 It is a structural diagram of the cooperation between the air duct cover and the humidity sensor provided in an embodiment of the present disclosure.

[0033] Reference numerals:

[0034] 100, liner; 200, air duct cover; 210, air outlet; 211, air outlet hood; 220, return air outlet; 221, return air hood; 230, buckle; 240, raised box; 241, sealing cover; 300, air flow duct; 310, fan; 311, raised frame; 320, evaporator coil; 330, temperature sensor; 340, heat exchange plate; 341, guide plate; 342, heating wire; 350, humidity sensor. DETAILED DESCRIPTION

[0035] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0036] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0037] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0038] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0039] Unless otherwise stated, the term "plurality" means two or more.

[0040] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0041] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0043] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0044] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0046] Combine Figure 1-2 As shown, an embodiment of the present disclosure provides a refrigerator, comprising: an inner container 100 and an air duct cover 200. The air duct cover 200 is disposed on the rear side wall of the inner container 100, and together with the inner container 100, encloses an outflow air duct 300. The side wall of the air duct cover 200 is provided with an air outlet 210 and a plurality of return air vents 220 that are connected to the inflow air duct 300; wherein the air outlet 210 is located above the plurality of return air vents 220, and the plurality of return air vents 220 are arranged in a vertical direction.

[0047] With the refrigerator provided by the embodiment of the present disclosure, the air in the energy flow ventilation duct 300 is blown into the inner liner 100 through the air outlet 210, and the air in the inner liner 100 then flows into the energy flow ventilation duct 300 through multiple return air vents 220, and the multiple return air vents 220 are arranged in the vertical direction. The air in different height areas of the inner liner 100 flows into the energy flow ventilation duct 300 through the return air vents 220 corresponding to the area, thereby improving the effect of the air circulation flow in the inner liner 100, making the temperature of each temperature zone in the inner liner 100 more uniform, and improving the temperature uniformity inside the refrigerator.

[0048] Optionally, the air duct cover 200 is made of plastic. Thus, the air duct cover 200 made of plastic is light in weight, reducing the overall weight of the refrigerator, and has relatively low thermal conductivity, reducing the risk of frost condensing on the front side wall of the air duct cover 200 due to low temperature.

[0049] Optionally, the air duct cover plate 200 is made of acrylonitrile butadiene styrene plastic material. Thus, the air duct cover plate 200 made of acrylonitrile butadiene styrene plastic material is light in weight, reducing the overall weight of the refrigerator, and has relatively good wear resistance, thereby improving the durability of the air duct cover plate 200.

[0050] Optionally, there are five return air vents 220. Thus, the air in the inner liner 100 enters the air flow duct 300 through the five return air vents 220. The five return air vents 220 are arranged vertically, allowing air from different height areas in the inner liner 100 to flow into the air flow duct 300, thereby improving the flow effect of air at different height areas in the inner liner 100 and achieving better temperature uniformity at different height areas in the inner liner 100.

[0051] Optionally, the air duct cover plate 200 is detachably connected to the rear side wall of the inner container 100. In this way, the cover plate can be installed or removed on the rear side wall of the inner container 100, making it convenient for the convection air duct 300 to be inspected and cleaned.

[0052] Combine Figure 3 As shown, optionally, a plurality of buckles 230 are provided at the edge of the air duct cover plate 200, and the air duct cover plate 200 is snapped together with the rear side wall of the inner liner 100 via the buckles 230. In this way, the air duct cover plate 200 is snapped together with the rear side wall of the inner liner 100 via the plurality of buckles 230 at the edge, making it more convenient to install the air duct cover plate 200 on the rear side wall of the inner liner 100 during assembly, thereby increasing assembly speed.

[0053] Optionally, the duct cover plate 200 is provided with a plurality of protrusion boxes 240, which protrude along the side wall of the duct cover plate 200 toward the rear side wall of the inner liner 100. The protrusion boxes 240 are provided with through holes, through which screws are passed to connect to the inner liner 100. In this way, by passing screws through the through holes in the protrusion boxes 240 to connect to the inner liner 100, the stability of the connection between the inner liner 100 and the duct cover plate 200 is improved.

[0054] Optionally, two protrusion boxes 240 are provided, which are arranged on the lower side of the air outlet 210 and above the multiple return air outlets 220. In this way, the protrusion box 240 is located between the air outlet 210 and the multiple return air outlets 220, reducing the risk of interference with the air outlet 210 and the multiple return air outlets 220.

[0055] Combine Figure 4 and Figure 5 As shown, optionally, a sealing cover 241 is detachably connected to the inner side of each protrusion box 240 to cover the screws in the corresponding protrusion box 240. In this way, the screws are connected to the inner liner 100 through the through holes on the protrusion box 240, and then the sealing cover 241 is placed in the protrusion box 240 to cover the corresponding screws, thereby reducing the risk of condensation caused by contact between cold air and the screws.

[0056] It can be understood that the sealing cover 241 is set in the corresponding raised box 240 to cover the screws, reduce the risk of screw exposure, and improve the aesthetics of the interior of the refrigerator.

[0057] Combine Figure 6As shown, each return air port 220 is optionally provided with a return air cover 221, which is connected to the front side wall of the air duct cover 200 and opens downward. In this way, the return air cover 221 guides the air in the inner liner 100 toward the flow duct 300, so that the air in the inner liner 100 flows into the flow duct 300 from bottom to top. The relatively high temperature air in the inner liner 100 rises toward the top of the inner liner 100, consistent with the guidance direction of the return air cover 221, thereby increasing the temperature of the air flowing into the flow duct 300 and increasing the cooling rate of the air in the inner liner 100.

[0058] Optionally, there are five return air covers 221. Thus, the number of return air covers 221 corresponds to the number of return air ports 220. Each return air port 220 is provided with a return air cover 221, which guides the air in the liner 100 into the air duct 300 to improve the uniformity of the air flow.

[0059] Optionally, an air outlet cover 211 is provided on the air outlet 210, and the air outlet cover 211 is connected to the front side wall of the air duct cover 200. In this way, the air flowing from the air outlet 210 to the inner liner 100 is guided by the air outlet cover 211, thereby improving the uniformity of air flow.

[0060] Optionally, multiple return air vents 220 are evenly arranged in the vertical direction. In this way, the positions of the multiple return air vents 220 are relatively uniform, so that air in different height areas of the inner liner 100 can flow into the air flow duct 300 through the return air vents 220 at corresponding heights, thereby improving the flow effect of air in different height areas of the inner liner 100 and further improving the temperature uniformity in the inner liner 100.

[0061] Optionally, each return air vent 220 is a long strip-shaped opening. Thus, the return air vent 220 has a relatively long opening length. At the same height, the return air area of ​​the return air vent 220 has a larger span, thereby increasing the return air area of ​​the return air vent 220. This allows air from different areas of the inner liner 100 to flow into the air flow duct 300 through the return air vent 220, thereby improving the flow of air from different areas of the inner liner 100.

[0062] Optionally, each return air outlet 220 is horizontally arranged, and multiple horizontally arranged return air outlets 220 are evenly distributed in the vertical direction.

[0063] Optionally, in the horizontal direction, the length of each return air vent 220 is greater than or equal to one-half the width of the duct cover 200, and less than or equal to nine-tenths the width of the duct cover 200. Thus, if the horizontal length of each return air vent 220 is less than one-half the width of the duct cover 200, the horizontal length of the return air vent 220 is relatively short, and the return air area span of the return air vent 220 at the same height is smaller, resulting in relatively poor air flow in different areas of the liner 100. If the horizontal length of each return air vent 220 is greater than nine-tenths the width of the duct cover 200, the horizontal length of the return air vent 220 is too long, reducing the structural strength of the duct cover 200. It can be seen from this that the horizontal length of each return air outlet 220 is greater than or equal to half of the width of the air duct cover 200, and less than or equal to nine-tenths of the width of the air duct cover 200, which is more reasonable. The return air area span of the return air outlet 220 at the same height is larger, which improves the flow effect of air in different areas of the inner liner 100 and improves the structural strength of the air duct cover 200.

[0064] Optionally, the distance between the plane where the air outlet 210 is located and the rear side wall of the inner liner 100 is greater than the distance between the plane where the multiple return air outlets 220 are located and the rear side wall of the inner liner 100. In this way, there is a step difference between the plane where the air outlet 210 is located and the plane where the return air outlets 220 are located. The air blown out of the air outlet 210 is relatively far away from the multiple return air outlets 220, which increases the time interval between the air blown out of the air outlet 210 and the return air outlet 220, thereby improving the cooling effect on the air in the inner liner 100.

[0065] Optionally, in the vertical direction, the distance between the topmost return air vent 220 and the bottommost return air vent 220 among the multiple return air vents 220 is greater than or equal to one-half the length of the rear side wall of the inner liner 100, and less than three-quarters the length of the rear side wall of the inner liner 100. Thus, when the distance between the topmost return air vent 220 and the bottommost return air vent 220 among the multiple return air vents 220 is less than one-half the height of the rear side wall of the inner liner 100, the vertical span of the return air area of ​​the multiple return air vents 220 is small, and the air flow effect in different areas of the inner liner 100 is poor. When the distance between the topmost return air vent 220 and the bottommost return air vent 220 among the multiple return air vents 220 is greater than three-quarters of the rear side wall of the inner liner 100, the outlet area of ​​the air outlet 210 is excessively occupied, thereby reducing the air flow effect in the air duct 300. It can be seen from this that the distance between the return air outlet 220 located at the top and the return air outlet 220 located at the bottom among the multiple return air outlets 220 is greater than or equal to one-half of the height of the rear side wall of the inner liner 100, and is more reasonable to be less than three-quarters of the rear side wall of the inner liner 100, thereby increasing the vertical span of the return air area of ​​the multiple return air outlets 220 and reducing the encroachment on the outlet area of ​​the outlet 210.

[0066] Optionally, the length of the air outlet 210 is less than or equal to two-thirds of the length of each return air outlet 220, and greater than or equal to one-third of the length of each return air outlet 220. In this way, the length of the air outlet 210 is relatively short, which increases the residence time of the air in the air duct 300 and improves the cooling effect of the air.

[0067] Optionally, a plurality of air outlets 210 are provided, and each air outlet 210 is located above a plurality of return air outlets 220. Thus, by providing a plurality of air outlets 210, the flow area of ​​the air outlet 210 into the inner liner 100 is increased, the range of blowing air in the inner liner 100 is increased, and the effect of air circulation in the inner liner 100 is improved.

[0068] Optionally, each air outlet 210 is a long strip-shaped opening, and multiple air outlets 210 are evenly arranged in the vertical direction, forming a rectangular air outlet area. In this way, the opening length of the air outlet 210 is relatively long, and the span of the air outlet area of ​​the air outlet 210 is large, thereby improving the effect of blowing out and agitating the air in the inner liner 100; multiple air outlets 210 are evenly arranged in the vertical direction, forming a rectangular air outlet area, thereby increasing the flow rate of air flowing out of the air outlet 210 and improving the effect of blowing out and agitating the air in the inner liner 100.

[0069] Optionally, there are five air outlets 210. In this way, the number of air outlets 210 corresponds to the number of return air outlets 220. The five air outlets 210 increase the area where the air in the air duct 300 flows into the inner liner 100, increase the range of blowing the air in the inner liner 100, and improve the effect of air circulation in the inner liner 100.

[0070] Optionally, there are five air outlet covers 211. In this way, the number of the air outlet covers 211 corresponds to the number of the air outlets 210, and each air outlet 210 is provided with an air outlet cover 211.

[0071] Combine Figure 7 As shown, optionally, a fan 310 is provided in the air flow duct 300, and the air outlet end of the fan 310 is arranged toward the air outlet 210. Thus, by providing the fan 310 in the air flow duct 300, the speed of the air flow at the air outlet 210 is increased, so that the air in the air flow duct 300 can flow into the inner liner 100 at a faster speed, accelerating the stirring of the air in the inner liner 100 and improving the effect of the air circulation in the inner liner 100.

[0072] Optionally, the fan 310 is connected to the duct cover 200 via a raised frame 311, which protrudes outward along the rear sidewall of the duct cover 200. Thus, the fan 310 is mounted on the duct cover 200 via the raised frame 311, increasing the distance between the fan 310 and the duct cover 200. The raised frame 311 also guides the air blown out by the fan 310 toward the air outlet 210, thereby improving the stability of the air output from the air outlet 210.

[0073] Optionally, an evaporator coil 320 is provided in the air flow duct 300, and the evaporator coil 320 is located in the inner area of ​​the air flow duct 300 corresponding to the multiple return air ports 220. In this way, the air in the liner 100 flows into the air flow duct 300 through the multiple return air ports 220, exchanges heat with the evaporator coil 320 in the air flow duct 300, and then flows back into the liner 100 through the air outlet 210.

[0074] Optionally, a temperature sensor 330 is provided at the air outlet 210 and / or the return air outlet 220, and the temperature sensor 330 is connected to the air duct cover 200. Thus, when the air outlet 210 is provided with a temperature sensor 330, the air temperature at the air outlet 210 can be detected, and the speed of the blower 310 and the operating temperature of the evaporator coil 320 can be adjusted based on the air temperature at the air outlet 210, so that the air temperature at the air outlet 210 remains within a preset range, reducing the risk of the air temperature at the air outlet 210 being too high or too low. When the return air outlet 220 is provided with a temperature sensor 330, the air temperature at the return air outlet 220 is monitored, and the operating temperature of the evaporator coil 320 is increased or decreased based on the air temperature at the return air outlet 220. When temperature sensors 330 are provided at both the air outlet 210 and the return air outlet 220, the temperature difference between the two temperatures is determined based on the temperature of the air in the inner tank 100 entering the air flow duct 300 and the air temperature at the air outlet 210, and compared with the preset temperature to adjust the operating temperature of the evaporator coil 320 and the speed of the fan 310.

[0075] Combine Figure 8 As shown, a heat exchange plate 340 is optionally provided on one side of the evaporator coil 320. The evaporator coil 320 is laid on the side wall of the heat exchange plate 340, and the heat exchange plate 340 is located between the evaporator coil 320 and the multiple return air ports 220. In this way, the evaporator coil 320 contacts the heat exchange plate 340, and the evaporator coil 320 then exchanges heat with the air in the air flow duct 300 through the heat exchange plate 340, thereby increasing the heat exchange contact area of ​​the air and improving the heat exchange effect.

[0076] Optionally, the heat exchange plate 340 is connected to the rear side wall of the inner container 100 by screws. In this way, the heat exchange plate 340 is connected to the rear side wall of the inner container 100 by screws, which improves the stability of the connection between the heat exchange plate 340 and the rear side wall of the inner container 100.

[0077] Optionally, the heat exchange plate 340 is a rectangular plate structure. In this way, the shape of the heat exchange plate 340 is more regular, which can better correspond to the rear side wall of the inner liner 100 and be better arranged in the air flow duct 300.

[0078] Optionally, the length of the long side of the heat exchange plate 340 is greater than or equal to the distance between the uppermost return air port 220 and the lowermost return air port 220 among the multiple return air ports 220. In this way, the long side of the heat exchange plate 340 is relatively long, and the heat exchange area is relatively large. The air flowing into the air flow duct 300 from the multiple return air ports 220 can better contact and exchange heat with the heat exchange plate 340, thereby improving the heat exchange effect.

[0079] Optionally, the length of the short side of the heat exchange plate 340 is greater than or equal to the horizontal length of the return air port 220. In this way, the short side of the heat exchange plate 340 is relatively long, and the heat exchange area is relatively large. The air flowing into the air flow duct 300 from the multiple return air ports 220 can better contact and exchange heat with the heat exchange plate 340, thereby improving the heat exchange effect.

[0080] Optionally, the heat exchange plate 340 is made of metal material. Thus, the heat exchange plate 340 made of metal material has relatively good thermal conductivity, and the evaporator coil 320 exchanges heat with the air in the air duct 300 through the heat exchange plate 340 at a higher efficiency.

[0081] Optionally, the heat exchange plate 340 is made of aluminum. Thus, the heat exchange plate 340 made of aluminum has relatively good thermal conductivity, and the evaporator coil 320 exchanges heat with the air in the air duct 300 through the heat exchange plate 340 at a higher efficiency.

[0082] Combine Figure 9 As shown, optionally, a plurality of guide plates 341 are provided on the front side wall of the heat exchange plate 340. Thus, the air flow in the air duct 300 is guided by the plurality of guide plates 341, and heat is exchanged with the heat exchange plate 340 through the guide plates 341, thereby increasing the heat exchange area with the air and improving the heat exchange effect.

[0083] Optionally, the guide plates 341 are vertically arranged. In this way, the air in the air duct 300 is guided to flow in a vertical direction by the multiple guide plates 341, and the air between different areas is separated, the air is cooled by the zones, and the cooling effect of the air is improved.

[0084] Optionally, the guide plate 341 is made of aluminum. Thus, the guide plate 341 made of aluminum has relatively good thermal conductivity and relatively high efficiency in exchanging heat with the air in the air duct 300.

[0085] Optionally, a heating wire 342 is provided on the guide plate 341. In this way, heating is performed regularly in the air flow passage 300 by the heating wire 342, which can reduce frost condensed in the air flow passage 300 and reduce the influence of frost on the flow of the air flow passage 300.

[0086] Combine Figure 10 As shown, optionally, a humidity sensor 350 is provided at the air outlet 210. The humidity sensor 350 is disposed in the air flow duct 300 and is connected to the air duct cover 200. In this way, the humidity in the air flow duct 300 is monitored by the humidity sensor 350. If the humidity in the air flow duct 300 is too high, the operating temperature of the evaporator coil 320 is increased, and the speed of the fan 310 is increased to increase the air output and the speed at which moisture in the air flow duct 300 is discharged.

[0087] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A refrigerator, characterized in that: include: Liner (100); An air duct cover plate (200) is disposed on the rear side wall of the inner liner (100) and encloses an outflow air duct (300) together with the inner liner (100); an air outlet (210) and a plurality of return air outlets (220) in communication with the outflow air duct (300) are disposed on the side wall of the air duct cover plate (200); The air outlet (210) is located above the plurality of return air outlets (220), and the plurality of return air outlets (220) are arranged in a vertical direction.

2. The refrigerator according to claim 1, characterized in that: The plurality of return air outlets (220) are evenly arranged in the vertical direction.

3. The refrigerator according to claim 1, characterized in that: Each air return port (220) is a long strip-shaped opening.

4. The refrigerator according to claim 1, characterized in that: The distance between the plane where the air outlet (210) is located and the rear side wall of the inner container (100) is greater than the distance between the plane where the plurality of return air outlets (220) are located and the rear side wall of the inner container (100).

5. The refrigerator according to claim 1, characterized in that: In the vertical direction, the distance between the return air outlet (220) located at the top and the return air outlet (220) located at the bottom among the multiple return air outlets (220) is greater than or equal to one-half of the length of the rear side wall of the inner liner (100), and less than three-quarters of the length of the rear side wall of the inner liner (100).

6. The refrigerator according to claim 1, characterized in that: The length of the air outlet (210) is less than or equal to two thirds of the length of each return air outlet (220), and greater than or equal to one third of the length of each return air outlet (220).

7. The refrigerator according to claim 6, characterized in that: A plurality of air outlets (210) are provided, and each air outlet (210) is located above a plurality of return air outlets (220).

8. The refrigerator according to any one of claims 1 to 7, characterized in that: A fan (310) is disposed in the air flow duct (300), and an air outlet end of the fan (310) is disposed toward the air outlet (210).

9. The refrigerator according to any one of claims 1 to 7, characterized in that: An evaporator coil (320) is provided in the air flow duct (300), and the evaporator coil (320) is located in an internal area of ​​the air flow duct (300) corresponding to the plurality of return air ports (220).

10. The refrigerator according to claim 9, characterized in that: A heat exchange plate (340) is provided on one side of the evaporator coil (320), the evaporator coil (320) is laid on the side wall of the heat exchange plate (340), and the heat exchange plate (340) is located between the evaporator coil (320) and the plurality of return air ports (220).

Images