Refrigerator

Abstract

The utility model relates to the technical field of refrigeration equipment, and discloses a refrigerator which comprises an inner container, an evaporator coil and an air pipe. The evaporator coil is arranged on the outer side wall of the inner container; the air pipe is attached to the evaporator coil and provided with an air inlet end and an air outlet end, and the air inlet end and the air outlet end are both communicated with the inner container. According to the refrigerator, the evaporator coil pipe is arranged on the side wall of the inner container, the air pipe is partially attached to the evaporator coil pipe, heat exchange is conducted between the evaporator coil pipe and the inner wall of the inner container, meanwhile, heat exchange is conducted between airflow circulating in the air pipe and the evaporator coil pipe, and the risk of frosting of the inner wall of the inner container is reduced while space occupation of the refrigerator is reduced. Air flow in the inner container circulates in the air pipe through the air inlet end and the air outlet end, the air flow circulating in the air pipe is fed into the inner container after heat exchange and cooling, and the temperature uniformity of the internal environment of the inner container 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] At present, the refrigeration of air-cooled freezers is achieved by setting an air duct connected to the inner tank on the outside of the inner tank, setting a fin evaporator and a fan in the air duct, and blowing the return air into the inner tank after heat exchange with the fin evaporator. The return air after heat exchange exchanges heat and cools the internal environment of the inner tank, thereby keeping the items stored in the inner tank fresh. However, air-cooled freezers have high energy consumption, and the setting of fin evaporators and fans will occupy more freezer volume.

[0003] There is a direct cooling freezer in the related art, which is characterized in that an evaporator coil is arranged on the outside of the inner tank, the evaporator coil exchanges heat with the inner wall of the inner tank, and the inner wall of the inner tank is used to directly exchange heat and cool the internal environment of the inner tank, thereby reducing the occupancy of the inner tank volume.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] If the temperature of the side wall of the inner tank is too low, a lot of frost will condense on the inner wall of the inner tank, and the temperature of the internal environment of the inner tank near the inner wall is lower, resulting in poor temperature uniformity of the internal environment of the inner tank.

[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 the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the 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 components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The disclosed embodiment provides a refrigerator, which reduces the risk of frost on the inner wall of the inner tank while reducing the space occupied by the refrigerator, and improves the temperature uniformity of the internal environment of the inner tank.

[0009] In some embodiments, a refrigerator includes: an inner container, an evaporator coil and an air duct. The evaporator coil is arranged on the outer wall of the inner container; the air duct is attached to the evaporator coil, and the air duct is provided with an air inlet end and an air outlet end, and both the air inlet end and the air outlet end are connected to the inner container.

[0010] Optionally, the diameter of the air duct is greater than or equal to the diameter of the evaporator coil, and less than or equal to four times the diameter of the evaporator coil.

[0011] Optionally, a groove is provided on the air duct, and the evaporator coil is attached to the air duct via the groove.

[0012] Optionally, the evaporator coil is arranged on multiple outer side walls of the inner tank.

[0013] Optionally, the flow area of ​​the air inlet end gradually decreases along the air inlet direction.

[0014] Optionally, the flow area of ​​the air outlet end gradually increases along the air outlet direction.

[0015] Optionally, the refrigerator further comprises: a heat exchange plate. A plurality of heat exchange plates are provided, each heat exchange plate abuts against the air duct and the evaporator coil, and is used for heat exchange between the evaporator coil and the air duct.

[0016] Optionally, the refrigerator further comprises: a heating unit which is partially or completely attached to the air duct.

[0017] Optionally, the heating unit includes: a heating wire. Part or all of the heating wire is attached to the air duct.

[0018] Optionally, the refrigerator further includes an air pump, which is connected to the air duct to provide power for the air flow in the air duct.

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

[0020] The evaporator coil is set on the side wall of the inner tank, and the air duct is attached to the evaporator coil. While the evaporator coil exchanges heat with the inner wall of the inner tank, the airflow in the air duct also exchanges heat with the evaporator coil, which reduces the space occupied by the refrigerator and reduces the risk of frost on the inner wall of the inner tank. The airflow in the inner tank circulates in the air duct through the air inlet and outlet. The airflow circulating in the air duct is sent to the inner tank after heat exchange and cooling, which improves the temperature uniformity of the internal environment of the inner tank.

[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, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

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

[0024] Figure 2 is a schematic structural diagram of another refrigerator provided by an embodiment of the present disclosure;

[0025] Figure 3 Yes Figure 2 The enlarged schematic diagram at A in the middle;

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

[0027] Figure 5 It is a schematic diagram of the structure of a plurality of air inlet pipes and a plurality of air outlet pipes provided in an embodiment of the present disclosure;

[0028] Figure 6 is a schematic diagram of the cooperation between an air duct and an evaporator coil provided in an embodiment of the present disclosure;

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

[0030] Figure 8 is a structural schematic diagram of an air inlet and an air outlet provided in an embodiment of the present disclosure;

[0031] Fig. 9 is a schematic structural diagram of a heat exchange plate provided by an embodiment of the present disclosure;

[0032] Fig.10 It is a schematic diagram of the structure of a heating wire and an air duct provided by an embodiment of the present disclosure;

[0033] Fig.11 It is a schematic diagram of the structure of a heating wire, an air duct and an evaporator coil provided by an embodiment of the present disclosure;

[0034] Fig.12 is a schematic diagram of the cooperation between an air pump and an air duct provided in an embodiment of the present disclosure;

[0035] Fig.13 It is a schematic diagram of the structure of another refrigerator provided in an embodiment of the present disclosure.

[0036] Reference numerals:

[0037] 100, inner tank; 110, placement slot; 200, evaporator coil; 300, air duct; 310, air inlet end; 320, air outlet end; 330, air inlet pipe; 340, heat exchange pipe; 350, air outlet pipe; 360, groove; 400, heating part; 410, heating wire; 500, air pump; 600, heat exchange plate; 710, compressor; 720, condenser; 730, filter; 740, capillary tube. DETAILED DESCRIPTION

[0038] In order to be able to understand the features and technical contents 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 attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the 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.

[0039] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0040] 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 have 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.

[0041] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0042] Unless otherwise stated, the term "plurality" means two or more.

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0044] Combination Figure 1-4As shown, the embodiment of the present disclosure provides a refrigerator, including: an inner container 100, an evaporator coil 200 and an air duct 300. The evaporator coil 200 is arranged on the outer wall of the inner container 100; the air duct 300 is attached to the evaporator coil 200, and the air duct 300 is provided with an air inlet end 310 and an air outlet end 320, and the air inlet end 310 and the air outlet end 320 are both connected to the inner container 100.

[0045] The refrigerator provided by the embodiment of the present disclosure is provided with an evaporator coil 200 on the side wall of the inner liner 100, and the air duct 300 is partially attached to the evaporator coil 200. While the evaporator coil 200 is used to exchange heat with the inner wall of the inner liner 100, the airflow flowing in the air duct 300 is also exchanged with the evaporator coil 200, thereby reducing the space occupied by the refrigerator and reducing the risk of frost on the inner wall of the inner liner 100. The airflow in the inner liner 100 circulates in the air duct 300 through the air inlet end 310 and the air outlet end 320, and the airflow circulating in the air duct 300 is sent to the inner liner 100 after heat exchange and cooling, thereby improving the temperature uniformity of the internal environment of the inner liner 100.

[0046] Optionally, part of the air duct 300 is attached to the evaporator coil 200. In this way, part of the air duct 300 is attached to the evaporator coil 200, and the attached part of the air duct 300 is in direct contact with the evaporator coil 200 for heat exchange, and the remaining part can be flexibly arranged on the outer wall of the inner tank 100, so that the arrangement of the air inlet end 310 and the air outlet end 320 is more reasonable, and the uniformity of the air flow in the inner tank 100 is improved.

[0047] Combination Figure 2 and Figure 3 As shown, optionally, a placement groove 110 is provided on the outer wall of the inner tank 100, and the evaporator coil 200 is arranged in the placement groove 110 and attached to the inner wall of the placement groove 110. In this way, the evaporator coil 200 is attached to the inner wall of the placement groove 110, thereby improving the heat exchange efficiency between the evaporator coil 200 and the inner tank 100. During the assembly process of the evaporator coil 200, the evaporator coil 200 can be directly placed in the placement groove 110, and the placement groove 110 limits and fixes the evaporator coil 200, thereby reducing the risk of misalignment of the evaporator coil 200 and reducing the difficulty of assembly.

[0048] Optionally, the air duct 300 is disposed in the placement groove 110. In this way, during the assembly process of the air duct 300, the air duct 300 can be directly placed in the placement groove 110, thereby reducing the risk of misalignment of the air duct 300 and reducing the difficulty of assembly.

[0049] Combination Figure 4As shown, optionally, the air duct 300 includes: an air inlet duct 330, a heat exchange tube 340 and an air outlet duct 350. The air inlet duct 330, the heat exchange tube 340 and the air outlet duct 350 are connected in sequence, and the air inlet duct 330 is provided with an air inlet end 310, and the air outlet duct 350 is provided with an air outlet end 320. In this way, the air in the inner liner 100 enters the heat exchange tube 340 through the air inlet end 310 and the air inlet duct 330 for heat exchange, and then the air is discharged into the inner liner 100 through the air outlet duct 350 and the air outlet end 320.

[0050] Optionally, the heat exchange tube 340 is attached to the evaporator coil 200. In this way, by attaching the heat exchange tube 340 to the evaporator, the air inlet duct 330 and the air outlet duct 350 can be flexibly arranged on the outer wall of the inner liner 100, and the air inlet end 310 and the air outlet end 320 are connected to the inner liner 100 at a more reasonable position, so that the air outlet direction of the air outlet end 320 and the air inlet direction of the air inlet end 310 are matched with each other, promoting the uniformity of air flow in the inner liner 100. It can be understood that the air inlet end 310 is connected to the left wall of the inner liner 100, and the air outlet end 320 is connected to the right wall of the inner liner 100, and the air flows out from the left wall of the inner liner 100 and flows in from the right wall, stirring the air inside the inner liner 100 and increasing the uniformity of the internal air.

[0051] Optionally, the heat exchange tube 340 is made of metal material. In this way, the heat exchange tube 340 is attached to the evaporator coil 200, and the heat exchange tube 340 made of metal material has relatively high thermal conductivity, which improves the heat exchange efficiency between the heat exchange tube 340 and the evaporator.

[0052] Optionally, the heat exchange tube 340 is made of copper. Thus, the heat exchange tube 340 made of copper has relatively high thermal conductivity, and when the heat exchange tube 340 is attached to the evaporator coil 200, the heat exchange efficiency between the evaporator coil 200 and the heat exchange tube 340 is higher.

[0053] Optionally, the air inlet duct 330 is made of polycarbonate plastic. Thus, the air inlet duct 330 made of polycarbonate plastic is relatively light, which can reduce the overall weight of the refrigerator; and the production cost is relatively low, which reduces the overall production cost of the air duct 300.

[0054] Combination Figure 5 As shown, optionally, a plurality of air inlet pipes 330 are provided, and the plurality of air inlet pipes 330 are individually connected to the inner liner 100, and an air inlet end 310 is provided on each air inlet pipe 330. In this way, by providing a plurality of air inlet pipes 330, each air inlet pipe 330 is individually connected to the inner liner 100, and a plurality of connecting positions are formed between the plurality of air inlet pipes 330 and the inner liner 100, the air in the inner liner 100 flows into the plurality of air inlet pipes 330 through the plurality of connecting positions, so that the air in different areas of the inner liner 100 flows, and the uniformity of the air flow in the inner liner 100 is improved.

[0055] Optionally, three air inlet pipes 330 are provided. In this way, the three air inlet pipes 330 are all connected to the heat exchange pipe 340, and the three connecting positions are reasonably arranged in different areas of the side wall of the inner liner 100, so that the air in different areas of the inner liner 100 can flow into the air inlet pipe 330 through the connecting positions at different positions through the air inlet end 310, thereby improving the uniformity of the air flow in the inner liner 100 and reducing the temperature difference between different areas of the inner liner 100.

[0056] Optionally, the material of the air outlet duct 350 is polycarbonate plastic. Thus, the air outlet duct 350 made of polycarbonate plastic is relatively light, which can reduce the overall weight of the refrigerator; and the production cost is relatively low, which reduces the overall production cost of the air outlet duct 300.

[0057] Optionally, a plurality of air outlet pipes 350 are provided, and the plurality of air outlet pipes 350 are individually connected to the inner liner 100, and an air outlet end 320 is provided on each air outlet pipe 350. In this way, the plurality of air outlet pipes 350 are individually connected to the inner liner 100, and the plurality of air outlet pipes 350 form a plurality of connection positions with the inner liner 100, and the air in the plurality of air outlet pipes 350 flows from the corresponding air outlet ends 320 and the corresponding connection positions to different areas in the inner liner 100, thereby improving the uniformity of the air flow in the inner liner 100 and reducing the temperature difference between different areas in the inner liner 100.

[0058] Optionally, three air outlet pipes 350 are provided. In this way, the three air outlet pipes 350 are connected to the inner liner 100 separately, and the air flows into the inner liner 100 from different directions and positions through the connection positions of the three air outlet pipes 350 and the inner liner 100, thereby improving the uniformity of the air flow in the inner liner 100.

[0059] Optionally, the diameter of the air duct 300 is greater than or equal to the diameter of the evaporator coil 200, and is less than or equal to four times the diameter of the evaporator coil 200. In this way, when the diameter of the air duct 300 is less than the diameter of the evaporator coil 200, the amount of air circulating in the air duct 300 is small, the airflow from the air duct 300 to the inner liner 100, and the airflow from the inner liner 100 to the air duct 300 are small, so that the uniformity of the air flow in the inner liner 100 is low. When the diameter of the air duct 300 is greater than four times the diameter of the evaporator coil 200, the diameter of the air duct 300 is relatively large, requiring more layout space, and reducing the volume of the refrigerator. It can be seen that the diameter of the air duct 300 is greater than or equal to the diameter of the evaporator coil 200, and is less than or equal to four times the diameter of the evaporator coil 200. It is relatively reasonable, can improve the uniformity of air flow in the inner liner 100, has a small demand for layout space, and increases the volume of the refrigerator.

[0060] Optionally, the diameter of the air duct 300 is equal to three times the diameter of the evaporator coil 200. In this way, the diameter of the air duct 300 is relatively large, the amount of air flowing in the air duct 300 is relatively large, the airflow from the air duct 300 to the inner liner 100, and the airflow from the inner liner 100 to the air duct 300 are relatively large, the uniformity of the air flow in the inner liner 100 is improved, and more heat can be absorbed from the evaporator coil 200, the temperature of the evaporator coil 200 is increased, and the condensed frost is reduced.

[0061] Optionally, the diameter of the air duct 300 is equal to the diameter of the evaporator coil 200. In this way, the diameter of the air duct 300 is relatively small, the requirement for the layout space is relatively small, and the occupation of the volume of the refrigerator is reduced.

[0062] Combination Figure 6 As shown, in one embodiment, a groove 360 ​​is provided on the air duct 300, and the air duct 300 is attached to the evaporator coil 200 through the groove 360. In this way, the air duct 300 is attached to the evaporator coil 200 through the groove 360, thereby increasing the contact area between the air duct 300 and the evaporator coil 200, and the heat exchange area between the air duct 300 and the evaporator coil 200 is relatively large, thereby improving the heat exchange efficiency.

[0063] Optionally, the groove 360 ​​on the air duct 300 is arranged along the axial direction of the air duct 300. In this way, the heat exchange area between the evaporator coil 200 and the air duct 300 is increased, and the heat exchange efficiency is improved.

[0064] Optionally, a groove 360 ​​is provided on the heat exchange tube 340, and the heat exchange tube 340 is attached to the evaporator coil 200 through the groove 360. In this way, the heat exchange tube 340 is attached to the evaporator coil 200 through the groove 360, increasing the heat exchange area between the evaporator coil 200 and the heat exchange tube 340, and improving the heat exchange efficiency.

[0065] Combination Figure 7 As shown, in another embodiment, the air duct 300 is wound around the outer wall of the evaporator coil 200. In this way, the air duct 300 is wound around the outer wall of the evaporator coil 200, which increases the contact area between the air duct 300 and the evaporator coil 200 and improves the efficiency of heat exchange.

[0066] Optionally, the heat exchange tube 340 is wound around the outer wall of the evaporator coil 200. In this way, by winding the heat exchange tube 340 around the outer wall of the evaporator coil 200, the contact area between the heat exchange tube 340 and the evaporator coil 200 is increased, thereby improving the efficiency of heat exchange.

[0067] In some embodiments, the evaporator coil 200 is disposed on multiple outer walls of the inner liner 100. In this way, the evaporator coil 200 exchanges heat with multiple outer walls of the inner liner 100 at the same time, exchanges heat and cools the interior of the inner liner 100 from multiple directions, speeds up the cooling speed of different areas inside the inner liner 100, and cools more evenly, reducing the temperature difference inside the inner liner 100.

[0068] In a specific embodiment, the evaporator coil 200 is disposed on the rear side wall, the upper side wall and the lower side wall of the inner liner 100. In this way, the evaporator coil 200 on the rear side wall, the upper side wall and the lower side wall of the inner liner 100 can simultaneously perform heat exchange and cooling on the inside of the inner liner 100 from multiple directions, thereby increasing the cooling speed inside the inner liner 100 and reducing the temperature difference inside the inner liner 100.

[0069] In another specific embodiment, the evaporator coil 200 is disposed on the left side wall, the rear side wall and the right side wall of the inner liner 100. In this way, the evaporator coil 200 simultaneously exchanges heat and cools the left side wall, the rear side wall and the right side wall of the inner liner 100, and simultaneously exchanges heat and cools the interior of the inner liner 100 from multiple directions, thereby increasing the cooling speed inside the inner liner 100 and reducing the temperature difference inside the inner liner 100.

[0070] Combination Figure 8 As shown, optionally, the flow area of ​​the air inlet end 310 gradually decreases along the air inlet direction thereof, so that the air inlet range of the air inlet end 310 is increased, so that the area into which the air flows is wider, and the uniformity of the air inlet is improved.

[0071] It can be understood that the flow area of ​​the air inlet end 310 is reduced to the flow area of ​​the air duct 300 at most.

[0072] Optionally, the air inlet end 310 is a trumpet-shaped structure. Thus, the trumpet-shaped air inlet end 310 increases the range of the air inside the liner 100 flowing into the air inlet end 310 and improves the uniformity of the air intake.

[0073] Optionally, the flow area of ​​the air outlet end 320 gradually increases along the air outlet direction, so that the air outlet range of the air outlet end 320 is increased, so that the air outflow area is wider and the air entering the inner liner 100 is more uniform.

[0074] Optionally, the air outlet end 320 is a trumpet-shaped structure. Thus, the air outlet range of the air outlet end 320 is increased by the trumpet-shaped structure of the air outlet end 320, and the uniformity of the air entering the inner liner 100 is improved.

[0075] Combination Fig. 9As shown, optionally, the refrigerator further includes: a heat exchange sheet 600. A plurality of heat exchange sheets 600 are provided, and each heat exchange sheet 600 abuts against the air duct 300 and the evaporator coil 200, and is used for heat exchange between the evaporator coil 200 and the air duct 300. In this way, heat conduction is performed between the evaporator coil 200 and the air duct 300 through the heat exchange sheet 600, thereby increasing the heat exchange area between the evaporator coil 200 and the air duct 300 and improving the heat exchange efficiency between the evaporator coil 200 and the air duct 300.

[0076] Combination Fig.10 As shown, in one embodiment, the refrigerator further includes: a heating unit 400. The heating unit 400 is partially or completely attached to the air duct 300. In this way, the temperature of the evaporator coil 200 and the air duct 300 can be increased through the heat radiation of the heating unit 400, the temperature in the air duct 300 can be increased, and the frost condensed on the inner wall of the air duct 300 can be reduced; by increasing the temperature of the air in the air duct 300, the air in the air duct 300 flows into the inner liner 100, which can reduce the frost condensed in the inner liner 100.

[0077] Optionally, the heating unit 400 is partially or completely attached to the heat exchange tube 340 .

[0078] It can be understood that the heating part 400 is partially or completely attached to the heat exchange tube 340 because the heat exchange tube 340 directly exchanges heat with the evaporator coil 200, and the risk of frosting is relatively high.

[0079] In a specific embodiment, the heating part 400 is completely attached to the heat exchange tube 340. In this way, when the heating part 400 is completely attached to the heat exchange tube 340, the contact area between the heating part 400 and the heat exchange tube 340 is larger, the heating effect on the heat exchange tube 340 is better, and the defrosting efficiency is higher when the inner wall of the heat exchange tube 340 is frosted.

[0080] In another specific embodiment, the heating unit 400 is partially attached to the heat exchange tube 340. In this way, the heating unit 400 is used to heat the airflow flowing in the heat exchange tube 340. Since the airflow inside the heat exchange tube 340 is in a flowing state, the heated airflow can flow along the heat exchange tube 340 to heat the inner wall of the heat exchange tube 340, thereby playing a role in defrosting the inner wall of the heat exchange tube 340, and the arrangement length of the heating unit 400 can be reduced, thereby reducing costs.

[0081] Exemplarily, when the heating part 400 is partially attached to the heat exchange tube 340, the heating part 400 is attached to the position of the heat exchange tube 340 close to the air inlet, and the heated air in the heat exchange tube 340 flows along the heat exchange tube 340 to heat the heat exchange tube 340 away from the air inlet, thereby achieving a defrosting effect.

[0082] Optionally, the heating unit 400 includes: a heating wire 410. The heating wire 410 is partially or completely attached to the air duct 300. In this way, the heating wire 410 is partially or completely attached to the air duct 300 and directly contacts the air duct 300. When the temperature of the heating wire 410 increases, the temperature of the air duct 300 can be increased, and the frost condensed on the inner wall of the air duct 300 can be reduced. After the air temperature in the air duct 300 increases, it enters the inner tank 100 through the air outlet 320, which can also reduce the frost condensed in the inner tank 100. The heating wire 410 can heat the evaporator coil 200 by heat radiation.

[0083] In another embodiment, the heating unit 400 includes: a heating wire 410. The heating wire 410 is disposed on the inner wall of the air duct 300. In this way, the inside of the air duct 300 is directly heated by the heating wire 410, the heating efficiency is higher, the speed of heating inside the air duct 300 is accelerated, and the frost condensed inside the air duct 300 is reduced.

[0084] Optionally, part of the heating wire 410 is disposed on the inner wall of the inner tube, and part of the heating wire 410 passes through the air duct 300 and extends to the outside of the air duct 300. In this way, the heating wire 410 inside the air duct 300 can directly heat the inside of the air duct 300 to reduce frost condensed inside the air duct 300, and the heating wire 410 outside the air duct 300 can also heat the evaporator coil 200 through heat radiation.

[0085] Combination Fig.11 As shown, in another embodiment, the heating unit 400 includes: a heating wire 410. The heating wire 410 is partially attached to the air duct 300 and partially attached to the refrigerant coil. In this way, the heating wire 410 can directly contact and heat the air duct and the refrigerant coil, reducing the frost condensed on the outside of the evaporator coil 200 and the frost condensed inside the air duct 300.

[0086] Combination Fig.12 As shown, optionally, the refrigerator further includes: an air pump 500. The air pump 500 is connected to the air duct 300 to provide power for the air flow in the air duct 300. In this way, the air inside the air duct 300 is circulated by the air pump 500, and the air blown out of the air duct 300 stirs the air flow inside the inner liner 100, thereby improving the uniformity of the temperature inside the inner liner 100.

[0087] Optionally, the air pump 500 is connected to the air inlet end 310 of the air duct 300. In this way, the air pump 500 is connected to the air inlet end 310 of the air duct 300, and the temperature is relatively high, reducing the risk of condensation of frost on the air pump 500.

[0088] Optionally, the refrigerator further includes: a fan. The fan is arranged on the inner wall of the inner liner 100 and is used to stir the air in the inner liner 100. In this way, by arranging the fan on the inner wall of the inner liner 100, the air inside the inner liner 100 is stirred, the uniformity of the air flow inside the inner liner 100 is increased, and the temperature difference inside the inner liner 100 is reduced.

[0089] Optionally, the air outlet end 320 of the air duct 300 is connected to the upper side wall of the inner liner 100. In this way, the air in the air duct 300 is blown out from the upper side wall of the inner liner 100 through the air outlet end 320, stirring the air in the inner liner 100 from top to bottom to improve the uniformity of the air in the inner liner 100.

[0090] Optionally, the fan is arranged at the connection between the air outlet 320 and the inner liner 100. In this way, the fan cooperates with the air outlet 320 to increase the air intake speed of the air duct 300 into the inner liner 100, further increase the intensity of stirring the air inside the inner liner 100, and improve the uniformity of the air inside the inner liner 100.

[0091] Combination Fig.13 As shown, optionally, the refrigerator also includes: a compressor 710, a condenser 720, a filter 730 and a capillary tube 740. The compressor 710, the condenser 720, the filter 730 and the capillary tube 740 are connected in sequence, one end of the evaporator coil 200 is connected to the compressor 710, and the other end of the evaporator coil 200 is connected to the capillary tube 740. In this way, after the refrigerant exchanges heat in the evaporator coil 200, it flows to the compressor 710, and the compressor 710 compresses the refrigerant into a high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant flows to the condenser 720 for heat exchange to form a low-temperature and high-pressure liquid refrigerant. After being filtered by the filter 730, it flows to the capillary tube 740 to form a low-temperature and low-pressure liquid refrigerant, and then flows to the evaporator coil 200.

[0092] 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 explicitly 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 evaporator coil (200) is disposed on the outer wall of the inner tank (100); The air duct (300) is attached to the evaporator coil (200), and the air duct (300) is provided with an air inlet end (310) and an air outlet end (320), and both the air inlet end (310) and the air outlet end (320) are connected to the inner tank (100).

2. The refrigerator according to claim 1, characterized in that: The diameter of the air duct (300) is greater than or equal to the diameter of the evaporator coil (200), and less than or equal to four times the diameter of the evaporator coil (200).

3. The refrigerator according to claim 1, characterized in that: The air duct (300) is provided with a groove (360), and is attached to the evaporator coil (200) via the groove (360).

4. The refrigerator according to claim 1, characterized in that: The evaporator coil (200) is arranged on a plurality of outer side walls of the inner container (100).

5. The refrigerator according to claim 1, characterized in that: The flow area of ​​the air inlet end (310) gradually decreases along the air inlet direction.

6. The refrigerator according to claim 1, characterized in that: The flow area of ​​the air outlet end (320) gradually increases along the air outlet direction.

7. The refrigerator according to claim 1, characterized in that: Also includes: A plurality of heat exchange fins (600) are provided, and each heat exchange fin (600) is in contact with the air duct (300) and the evaporator coil (200) and is used for heat exchange between the evaporator coil (200) and the air duct (300).

8. The refrigerator according to any one of claims 1 to 7, characterized in that: Also includes: The heating unit (400) is partially or completely attached to the air duct (300).

9. The refrigerator according to claim 7, characterized in that: The heating unit (400) comprises: The heating wire (410) is partially or completely attached to the air duct (300).

10. The refrigerator according to any one of claims 1 to 7, characterized in that: Also includes: The air pump (500) is connected to the air duct (300) to provide power for the air flow in the air duct (300).

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