Refrigerator

Abstract

The utility model discloses a refrigerator which comprises a refrigerator body, an air return pipe and an evaporator, and the refrigerator body is provided with a first chamber and a second chamber; the air inlet end of the air return pipe communicates with the first chamber and is located on the side wall, close to the second chamber, of the first chamber. The evaporator is arranged on the refrigerator body and located on one side of the second chamber, and the air outlet end of the air return pipe extends to the bottom end of the second chamber and communicates with the evaporator. Therefore, return air can flow through the whole evaporator, so that the utilization rate of the evaporator is improved, the evaporator can participate in heat exchange in a larger area, the heat exchange efficiency is improved, the temperature consistency of all areas of the evaporator can be improved, the local frosting phenomenon of the evaporator is avoided, the probability of frost blockage is reduced, and the evaporation effect and the refrigeration efficiency can be improved. The energy consumption is reduced, and the user experience can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a refrigerator. Background Art

[0002] In the prior art, the return air of a double-door refrigerator is generally opened from the side of the cold storage room, and the return air is introduced into the side of the freezer through plastic parts or foam parts. However, since the evaporator is usually placed flat behind the freezer tank, returning air from the side will cause severe frost on the local part of the evaporator close to the return air side of the cold storage room, which is prone to frost blockage, resulting in poor refrigeration effect and increased energy consumption of the refrigerator. At the same time, the rest of the evaporator cannot be well utilized for refrigeration because it is far away from the return air position, which seriously affects the evaporation effect and refrigeration efficiency. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a refrigerator in which the return air can flow through the entire evaporator, which can improve the temperature consistency of each area of ​​the evaporator, improve the evaporation effect and refrigeration efficiency, save energy consumption, and improve the user experience.

[0004] According to a refrigerator of an embodiment of the first aspect of the utility model, the refrigerator comprises: a box, a return air duct and an evaporator, the box having a first chamber and a second chamber; the return air duct is arranged in the box, and an air inlet end of the return air duct is communicated with the first chamber, the air inlet end of the return air duct is located on a side wall of the first chamber adjacent to the second chamber, and is arranged adjacent to a back plate of the first chamber; the evaporator is arranged in the box, and is located on one side of the second chamber, the air outlet end of the return air duct extends to the bottom end of the second chamber, and is communicated with the evaporator.

[0005] According to the refrigerator of the present invention, by extending the air outlet end of the return air duct to the bottom end of the second chamber and connecting it with the evaporator, the return air can flow through the entire evaporator, so as to improve the utilization rate of the evaporator, enable the evaporator to participate in heat exchange over a larger area, improve the heat exchange efficiency, improve the temperature consistency of each area of ​​the evaporator, avoid local frosting of the evaporator, reduce the probability of frost blockage, improve the evaporation effect and refrigeration efficiency, save energy consumption, and enhance the user experience.

[0006] According to some embodiments of the present invention, a return air port is provided on the side wall of the first chamber, and the return air duct is connected to the return air port.

[0007] Furthermore, a connecting flange is provided on the peripheral side of the air inlet end, and the connecting flange cover is provided on at least a portion of the outer surface of the first chamber.

[0008] In some embodiments, an air inlet grille is further provided on the air inlet end, and the air inlet grille is opposite to the return air outlet.

[0009] According to some embodiments of the present invention, an angle is formed between the air inlet and the air outlet, the air outlet is located at the bottom of the evaporator, and the air inlet is located at a side of the first chamber adjacent to the evaporator.

[0010] In some embodiments, an installation bin is provided on the back plate of the box body, the evaporator is arranged in the installation bin, the two ends of the tube body of the return air duct are respectively formed as an air inlet end and an air outlet end, and the tube body is located on the back side of the back plate.

[0011] Furthermore, an air inlet is provided at the bottom end of the installation bin, and the air outlet has an extension pipe section, and at least a portion of the extension pipe section extends into the air inlet.

[0012] According to some embodiments of the utility model, the return air duct includes a first tube body and a second tube body, the first tube body includes a first plate body and a first connecting plate located on both sides of the first plate body, the second tube body includes a second plate body and a second connecting plate located on both sides of the second plate body, the first connecting plate and the second connecting plate are detachably connected, and the first plate body and the second plate body are arranged opposite to each other and have the same direction.

[0013] Further, the first plate body is connected to the installation chamber, or the side of the installation chamber facing away from the box body defines the first plate body.

[0014] According to some embodiments of the present invention, the length of the air inlet end is smaller than the length of the air outlet end, and the length of the air outlet end is greater than or equal to the width of the evaporator.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 Schematic diagram of a refrigerator according to some embodiments of the utility model Figure 1 ;

[0018] Figure 2 Schematic diagram of a refrigerator according to some embodiments of the utility model Figure 2 ;

[0019] Figure 3is a partial structural schematic diagram of a refrigerator according to some embodiments of the utility model;

[0020] Figure 4 Schematic diagram of return air duct according to some embodiments of the utility model Figure 1 ;

[0021] Figure 5 Schematic diagram of return air duct according to some embodiments of the utility model Figure 2 .

[0022] Reference numerals:

[0023] Refrigerator 1;

[0024] Box 11;

[0025] The first chamber 11a, the second chamber 11b, and the return air outlet 11c;

[0026] Partition plate 111, back plate 112, installation chamber 113, air inlet 113a;

[0027] Return air duct 12;

[0028] The air inlet end 12a is connected to the flange 12a1 and the air inlet grille 12a2;

[0029] Air outlet end 12b, extension pipe section 12b1;

[0030] A first tube body 121, a first plate body 1211, a flange portion 12111, and a first connecting plate 1212;

[0031] A second tube body 122, a second plate body 1221, and a second connecting plate 1222;

[0032] Air guide rib 123;

[0033] Evaporator 13. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0036] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0039] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0042] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0043] The term "plurality" used in the present application refers to two or more (including two).

[0044] Reference below Figure 1-Figure 5 A refrigerator 1 according to an embodiment of the present invention is described.

[0045] like Figure 1-Figure 3 As shown, according to the refrigerator 1 of the embodiment of the first aspect of the utility model, the refrigerator 1 includes: a box body 11, a return air duct 12 and an evaporator 13.

[0046] The housing 11 has a first chamber 11a and a second chamber 11b; the return air duct 12 is arranged in the housing 11, and the air inlet end 12a of the return air duct 12 is communicated with the first chamber 11a, and the air inlet end 12a of the return air duct 12 is located on the side wall of the first chamber 11a adjacent to the second chamber 11b, and is arranged adjacent to the back plate of the first chamber 11a; the evaporator 13 is arranged in the housing 11, and is located on one side of the second chamber 11b, and the air outlet end 12b of the return air duct 12 extends to the bottom end of the second chamber 11b, and is communicated with the evaporator 13.

[0047] Specifically, the first chamber 11a and the second chamber 11b may be the refrigerating chamber and the freezing chamber of the refrigerator 1, respectively. The evaporator 13 may be arranged in the housing 11 and located at one side of the second chamber 11b. It can be understood that the evaporator 13 is arranged on the side where the second chamber 11b is located, and the evaporator 13 may be separated from the second chamber 11b, and may be arranged sequentially with the second chamber 11b in the front-rear direction of the housing 11. The evaporator 13 and the first chamber 11a may be connected through the return air duct 12. The air in the first chamber 11a may enter the return air duct 12 from the air inlet end 12a, and flow out through the air outlet end 12b of the return air duct 12 to exchange heat with the evaporator 13, so that the first chamber 11a can maintain a refrigerating temperature and realize a refrigerating function. Furthermore, since the air outlet 12 b extends to the bottom of the second chamber 11 b , after the return air flows from the first chamber 11 a to the evaporator 13 , it can flow from the bottom of the evaporator 13 toward the top of the evaporator 13 , so that the return air can pass through the evaporator 13 evenly.

[0048] It should be noted that the refrigerator 1 may have a fan, which is located on one side of the second chamber 11b and arranged above the evaporator 13. The fan generates wind force to push air from the first chamber 11a toward the evaporator 13 and evenly passes through the entire evaporator 13 from bottom to top.

[0049] It is understandable that, in the prior art, the return air enters from one side (such as the left or right side) of the evaporator 13 and flows out from the top of the evaporator 13, and the return air flow is difficult to evenly cover the entire evaporator 13, so that the evaporator 13 can only partially participate in the refrigeration process, which will not only reduce the refrigeration efficiency and refrigeration effect, but also cause local frost on the evaporator 13, and even cause frost blockage of the evaporator 13.

[0050] According to the refrigerator 1 of the present invention, by extending the air outlet end 12b of the return air duct 12 to the bottom end of the second chamber 11b and connecting with the evaporator 13, the return air can flow through the entire evaporator 13, so as to improve the utilization rate of the evaporator 13, so that the evaporator 13 can participate in heat exchange over a larger area, improve the heat exchange efficiency, improve the temperature consistency of each area of ​​the evaporator 13, avoid local frosting of the evaporator 13, reduce the probability of frost blockage, improve the evaporation effect and refrigeration efficiency, save energy consumption, and enhance the user experience.

[0051] like Figure 1 As shown, according to some embodiments of the present invention, a return air port 11c is provided on the side wall of the first chamber 11a, and the return air duct 12 is connected to the return air port 11c.

[0052] Specifically, the first chamber 11a of the box body 11 has side walls opposite to each other in the left-right direction of the box body 11, and the first chamber 11a is spaced from the second chamber 11b in the left-right direction. A return air port 11c is formed on the side wall of the first chamber 11a close to the second chamber 11b, and the return air port 11c is connected to the first chamber 11a, and the return air duct 12 is connected to the return air port 11c, so that the first chamber 11a can be connected to the return air duct 12, and it can be ensured that the return air in the first chamber 11a can flow smoothly toward the evaporator 13 under the guidance of the return air duct 12.

[0053] It can be understood that in the through direction of the return air outlet 11c (defined by the space of the box body 11, the left and right direction of the box body 11), the contour shape of the return air outlet 11c and the air inlet end 12a of the return air duct 12 are consistent to ensure air tightness, improve return air efficiency, and improve abnormal noise.

[0054] Preferably, the contour shapes of the return air port 11c and the air inlet end 12a are both constructed as rectangles extending in the height direction to save the space occupied by the return air duct 12 in the front-to-back direction of the box body 11, so as to improve the space utilization of the refrigerator 1.

[0055] like Figure 4 and Figure 5 As shown, according to some embodiments of the present invention, a connecting flange 12a1 is provided on the peripheral side of the air inlet end 12a, and the connecting flange 12a1 covers at least a portion of the outer surface of the first chamber 11a.

[0056] Specifically, the connecting flange 12a1 can be arranged on the peripheral side of the air inlet end 12a and extend away from the air inlet end 12a. The connecting flange 12a1 can abut against at least part of the outer surface of the first chamber 11a. The shape and angle of the connecting flange 12a1 can be designed according to the shape and angle of the part of the first chamber 11a located around the return air port 11c to improve its adaptability to the first chamber 11a. By providing the connecting flange 12a1, the connection area and assembly accuracy of the air inlet end 12a can be increased, the air tightness of the connection between the air inlet end 12a and the return air port 11c can be improved, the return air volume can be increased and the return air flow direction can be guaranteed to be accurate, the refrigeration efficiency and effect can be enhanced, and the assembly positioning accuracy and convenience of the return air duct 12 can be improved, which is conducive to improving production efficiency.

[0057] like Figure 2 and Figure 4 As shown, according to some embodiments of the present invention, an air inlet grille 12a2 is further provided on the air inlet end 12a, and the air inlet grille 12a2 is opposite to the return air port 11c.

[0058] Specifically, the air inlet grille 12a2 can divide the air inlet end 12a into a plurality of air guide ports, and the return air in the first chamber 11a can enter the return air duct 12 through different air guide ports to achieve diversion. By setting the air inlet grille 12a2, on the one hand, it helps to guide the return air to enter the return air duct 12 smoothly, improve the uniformity and continuity of the return air flow, and improve the cooling efficiency; on the other hand, the air inlet grille 12a2 has a good blocking effect, which can prevent foreign matter from entering the air duct of the return air duct 12, and effectively improve the working reliability; on the third hand, the air inlet grille 12a2 also helps to manage the condensed water at the air inlet end 12a, which can prevent the water from dripping directly, and improve the dryness inside the first chamber 11a; on the fourth hand, the air inlet grille 12a2 can also reduce the noise generated when the return air flows, and provide a more comfortable and quiet environment.

[0059] It should be pointed out that the air inlet grille 12a2 can be composed of a plurality of partitions arranged in an alternating manner, or a plurality of partitions arranged at intervals. Preferably, the air inlet grille 12a2 is composed of a plurality of partitions that are spaced and inclined in the height direction to ensure good air volume and condensation water management effects.

[0060] like Figure 1-Figure 3 As shown, according to some embodiments of the present invention, an angle is formed between the air inlet end 12a and the air outlet end 12b, the air outlet end 12b is located at the bottom of the evaporator 13, and the air inlet end 12a is located at a side of the first chamber 11a adjacent to the evaporator 13.

[0061] Specifically, the air inlet end 12a cooperates with the return air port 11c connected to the first chamber 11a, and the air outlet end 12b extends to the bottom end of the second chamber 11b, and cooperates with the evaporator 13, and the evaporator 13 is located on one side of the second chamber 11b. Therefore, by setting an angle between the air inlet end 12a and the air outlet end 12b, the arrangement of the air inlet end 12a and the air outlet end 12b can meet the adaptation requirements of the evaporator 13 and the return air port 11c being located in different directions, so that the return air duct 12 can evenly guide the return air in the first chamber 11a to the bottom of the evaporator 13, and evenly pass through the entire evaporator 13, which can improve the temperature consistency of each part of the evaporator 13 and improve the working performance.

[0062] Exemplarily, the return air inlet 11c is constructed to be located above the air outlet end 12b in the height direction, and the return air inlet 11c is through in the left-right direction and the air outlet end 12b is open upward, then the angle between the air inlet end 12a and the air outlet end 12b can be 90° to match the return air inlet 11c and the evaporator 13.

[0063] like Figure 2 and Figure 3As shown, according to some embodiments of the utility model, an installation bin 113 is provided on the back plate 112 of the box body 11, the evaporator 13 is arranged in the installation bin 113, and the two ends of the tube body of the return air duct 12 are respectively formed as an air inlet end 12a and an air outlet end 12b, and the tube body is located on the back side of the back plate 112.

[0064] Specifically, the evaporator 13 can be arranged in the installation bin 113 on the back plate 112 of the box body 11, and the tube body of the return air duct 12 is located on the back side of the back plate 112. Defined by the front and rear spaces of the box body 11, the evaporator 13 and the tube body are respectively located on the front and rear sides of the installation bin 113. In this way, on the one hand, the structure of the tube body and the evaporator 13 is compact, which can improve the integration and save the layout space; on the other hand, the layout of the tube body and the evaporator 13 is reasonable, which is conducive to the coordination between the air outlet end 12b and the evaporator 13.

[0065] like Figure 2 As shown, according to some embodiments of the present invention, an air inlet 113a is disposed at the bottom end of the installation compartment 113, and the air outlet end 12b has an extension pipe section 12b1, and at least a portion of the extension pipe section 12b1 extends into the air inlet 113a.

[0066] Specifically, the air inlet 113a can be formed at the bottom end of the installation chamber 113, the air inlet 113a can extend in the left-right direction, and the air inlet 113a penetrates the installation chamber 113 in the front-to-back direction, and the air outlet 12b of the return air duct 12 can be formed with an extension pipe section 12b1 extending in the front-to-back direction, at least part of the extension pipe section 12b1 extends from the back to the front into the air inlet 113a, and the outer surface of the extension pipe section 12b1 is suitable for abutting against the inner wall of the air inlet 113a. By using the extension pipe section 12b1 to cooperate with the air inlet 113a, the air outlet 12b can be connected to the evaporator 13 to ensure that the air outlet 12b can smoothly guide the return air to the evaporator 13. Among them, the extended pipe section 12b1 can improve the air tightness and reliability of the connection between the air outlet end 12b and the air inlet 113a, which is beneficial to ensure the air volume and installation stability of the air outlet end 12b. In addition, the extended pipe section 12b1 can also play a good assembly positioning role, which helps to improve the assembly efficiency and convenience of the air outlet end 12b.

[0067] like Figure 4 and Figure 5 As shown, according to some embodiments of the utility model, the return air duct 12 includes a first tube body 121 and a second tube body 122, the first tube body 121 includes a first plate body 1211 and a first connecting plate 1212 located on both sides of the first plate body 1211, the second tube body 122 includes a second plate body 1221 and a second connecting plate 1222 located on both sides of the second plate body 1221, the first connecting plate 1212 is detachably connected to the second connecting plate 1222, the first plate body 1211 and the second plate body 1221 are arranged opposite to each other and have the same direction.

[0068] Specifically, the return air duct 12 can be divided into two parts, a first tube body 121 and a second tube body 122. The first plate body 1211 in the first tube body 121 and the second plate body 1221 in the second tube body 122 have the same direction, and the two can be arranged opposite to each other in the front-to-back direction. At the same time, the first plate body 1211 can be provided with a first connecting plate 1212 on both sides in the width direction, and the second plate body 1221 can be provided with a second connecting plate 1222 on both sides in the width direction. The first connecting plate 1212 and the second connecting plate 1222 extend in a direction close to each other, and the first connecting plate 1212 and the second connecting plate 1222 are detachably connected, so that the first tube body 121 and the second tube body 122 are detachably connected, so that the assembly efficiency and maintenance convenience of the first tube body 121 and the second tube body 122 can be improved.

[0069] It should be pointed out that the first connecting plate 1212 and the second connecting plate 1222 may have a certain thickness in the height direction, and the first plate body 1211 and the second plate body 1221 may have a certain thickness in the front-to-back direction, so that by connecting the first connecting plate 1212 with the second connecting plate 1222, the first connecting plate 1212, the second connecting plate 1222, the first plate body 1211 and the second plate body 1221 can jointly define at least a portion of the return air channel that is closed on the circumferential side, so as to ensure that the return air duct 12 has good airtightness.

[0070] In some specific embodiments of the utility model, the first tube body 121 includes a first section and a second section connected, wherein the first section extends in the height direction, and an air outlet end 12b is formed at one end of the first section away from the second section, and the extension direction of the second section intersects with the first section, and an air inlet end 12a is formed at one end of the second section away from the first section; the second tube body 122 includes a third section and a fourth section connected; wherein the first section is opposite to the third section and both extend in the height direction, the second section is opposite to the fourth section and the extension direction is consistent, and the extension direction of the second section and the fourth section intersects with the extension direction of the first section and the third section. In this way, the return air duct 12 as a whole can be adapted to the evaporator 13 and the return air port 11c arranged in different directions.

[0071] In addition, in other specific embodiments of the present invention, Figure 4 As shown, at least one air guide rib 123 is provided on the first plate body 1211 and / or the second plate body 1221 to divide the return air channel into a plurality of sub-channels. In this way, the return air can be diverted and guided in the return air channel, which can increase the return air flow rate and the air volume, thereby helping to enhance the cooling efficiency and effect.

[0072] like Figure 2 and Figure 3As shown, according to some embodiments of the present invention, the first plate body 1211 is connected to the installation chamber 113 , or the side of the installation chamber 113 facing away from the box body 11 defines the first plate body 1211 .

[0073] Specifically, the first plate body 1211 is located between the second plate body 1221 and the installation bin 113. The first plate body 1211 and the installation bin 113 can be constructed as two separately molded components. The first plate body 1211 is connected to the installation bin 113 and the second plate body 1221 on both sides in the front-to-back direction, respectively, so as to realize the installation and fixation of the return air duct 12 on the box body 11. In this way, the convenience of assembly and maintenance of various parts of the return air duct 12 can be improved; the first plate body 1211 and the installation bin 113 can also be constructed as an integrally molded part. By connecting the second plate body 1221 with the first plate body 1211, the assembly and fixation of the return air duct 12 and the box body 11 can be quickly completed. In this way, the production efficiency can be improved and the connection reliability between the return air duct 12 and the box body 11 is enhanced.

[0074] In addition, in some specific embodiments of the present invention, both ends of the first plate 1211 in the extension direction are formed with flanged portions 12111 extending away from the second plate 1221, and the flanged portions 12111 are suitable for abutting against the side of the installation bin 113 away from the box body 11. It can be understood that the flanged portions 12111 can increase the connection area between the first plate 1211 and the installation bin 113, thereby improving the connection stability between the first plate 1211 and the installation bin 113, and the flanged portions 12111 can also play a positioning and guiding role in the assembly between the first plate 1211 and the installation bin 113, so as to improve the assembly accuracy and reliability.

[0075] like Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, the length of the air inlet end 12 a is smaller than the length of the air outlet end 12 b , and the length of the air outlet end 12 b is greater than or equal to the width of the evaporator 13 .

[0076] Specifically, in this embodiment, the air inlet end 12a can extend in the height direction to adapt to the return air port 11c, and the air outlet end 12b can extend in the left and right direction to adapt to the air inlet 113a, wherein the length of the air inlet end 12a is smaller than the length of the air outlet end 12b, so that the return air enters with a small opening and exits with a large opening when flowing through the return air duct 12. In this way, on the first hand, the contact area of ​​the return air with the evaporator 13 after flowing out of the air outlet end 12b can be increased, which can improve the heat exchange efficiency and improve the working efficiency of the refrigerator 1; on the second hand, the small air intake makes the arrangement of the air inlet end 12a occupy a small space, which helps to further save the space occupied by the arrangement of the return air duct 12 and improve the space utilization of the refrigerator 1; on the third hand, the turbulence and noise generated by the return air flow can be reduced to provide a quieter operating environment.

[0077] It is understandable that when the air outlet end 12b is smaller than the width of the evaporator 13, the return air can only flow through a part of the width direction of the evaporator 13 after flowing out of the air outlet end 12b, which will cause severe frost in the local area of ​​the evaporator 13 that contacts the return air, while the remaining areas that are not in contact with the return air cannot make good use of the return air for cooling, which will cause the cooling effect and efficiency to deteriorate. Therefore, in this embodiment, by limiting the length of the air outlet end 12b and the width of the evaporator 13 to the above range, the length of the air outlet end 12b and the width of the evaporator 13 are set within a suitable range, which can ensure that after the return air flows out of the air outlet end 12b, the return air flows through the entire area of ​​the evaporator 13 in the width direction, thereby improving the temperature consistency of each area of ​​the evaporator 13 and optimizing the working performance of the evaporator 13 and the refrigerator 1.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0079] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A refrigerator, characterized in that: include: A box body, the box body having a first chamber and a second chamber; A return air duct, the return air duct is arranged in the box body, and the air inlet end of the return air duct is connected with the first chamber, the air inlet end of the return air duct is located on the side wall of the first chamber adjacent to the second chamber, and is arranged adjacent to the back plate of the first chamber; The evaporator is arranged in the box body and located at one side of the second chamber. The air outlet end of the return air duct extends to the bottom end of the second chamber and is connected to the evaporator.

2. The refrigerator according to claim 1, characterized in that: A return air port is arranged on the side wall of the first chamber, and the return air duct is communicated with the return air port.

3. The refrigerator according to claim 2, characterized in that: A connecting flange is arranged on the peripheral side of the air inlet end, and the connecting flange cover is arranged on at least a part of the outer surface of the first chamber.

4. The refrigerator according to claim 2, characterized in that: The air inlet end is also provided with an air inlet grille, and the air inlet grille is opposite to the return air outlet.

5. The refrigerator according to claim 1, characterized in that: An included angle is formed between the air inlet and the air outlet. The air outlet is located at the bottom of the evaporator, and the air inlet is located at a side of the first chamber adjacent to the evaporator.

6. The refrigerator according to claim 1, characterized in that: An installation bin is arranged on the back plate of the box body, the evaporator is arranged in the installation bin, two ends of the tube body of the return air duct are respectively formed as an air inlet end and an air outlet end, and the tube body is located on the back side of the back plate.

7. The refrigerator according to claim 6, characterized in that: The bottom end of the installation bin is provided with an air inlet, and the air outlet end has an extension pipe section, and at least a portion of the extension pipe section extends into the air inlet.

8. The refrigerator according to claim 6, characterized in that: The return air duct includes a first tube body and a second tube body, the first tube body includes a first plate body and a first connecting plate located on both sides of the first plate body, the second tube body includes a second plate body and a second connecting plate located on both sides of the second plate body, the first connecting plate and the second connecting plate are detachably connected, and the first plate body and the second plate body are arranged opposite to each other and have the same direction.

9. The refrigerator according to claim 8, characterized in that: The first plate body is connected to the installation bin, or the side of the installation bin facing away from the box body defines the first plate body.

10. The refrigerator according to any one of claims 1 to 9, characterized in that: The length of the air inlet end is smaller than the length of the air outlet end, and the length of the air outlet end is greater than or equal to the width of the evaporator.

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