Premixing structure and refrigerator

Abstract

The utility model provides a premixing structure and a refrigerator, the premixing structure comprises a shell, a premixing cavity is formed in the shell, a refrigeration air inlet, a freezing air inlet and an air outlet are formed in the shell, the refrigeration air inlet is used for communicating with a refrigeration air return duct of the refrigerator, and the freezing air inlet is used for communicating with a freezing air return duct of the refrigerator; the shell comprises a plurality of first partition plates which divide the premixing cavity into a plurality of cavities so that at least part of refrigeration air entering from the refrigeration air inlet and at least part of freezing air entering from the freezing air inlet can be distributed into the different cavities to be mixed once or multiple times. And the formed mixed gas flows to the evaporator of the refrigerator through the air outlet, so that the problems that the thickness distribution of a frost layer on the surface of the evaporator is non-uniform and the frost layer blocks an evaporator channel are solved, and the using body feeling of a user to the refrigerator is greatly improved.

Description

Technical Field

[0001] This application relates to the field of refrigerator technology, and in particular to a premixed structure and a refrigerator. Background Technology

[0002] A refrigerator is a refrigeration device that maintains a constant low temperature, used to store items that require low-temperature preservation. Frost-free refrigerators are currently a popular type on the market, offering advantages such as even temperature distribution and frost-free operation.

[0003] In related technologies, in air-cooled refrigerators, the rotating fan drives air to circulate between the refrigerator compartment, freezer compartment, and evaporator. This circulating air exchanges heat with the evaporator, and the resulting low-temperature circulating air enters the refrigerator and freezer compartments respectively through the refrigerator and freezer air ducts, cooling the food inside before flowing to the evaporator. Due to the significant temperature difference between the refrigerator and freezer return air, the evaporator exhibits a distinct temperature boundary. Furthermore, because the refrigerator return air temperature is higher, its saturated moisture content is higher than that of the freezer return air. This results in more frost buildup at the evaporator's frost-covered areas compared to the freezer return air areas, leading to uneven frost distribution on the evaporator surface. This frost buildup can even block evaporator channels, increasing the evaporator's heat exchange resistance and reducing its efficiency, negatively impacting the refrigerator's performance. Utility Model Content

[0004] This invention provides a premixing structure that can premix refrigerated return air and frozen return air multiple times before they enter the evaporator, thereby improving the problems of uneven frost distribution on the evaporator surface and frost clogging the evaporator channels.

[0005] To achieve the above objectives, this application proposes a premixed structure, which includes a shell, a premixing chamber inside the shell, and a refrigerated air inlet, a frozen air inlet, and an air outlet on the shell. The refrigerated air inlet is used to communicate with the refrigerated return air duct of a refrigerator, and the frozen air inlet is used to communicate with the frozen return air duct of a refrigerator.

[0006] The housing includes a plurality of first partitions that divide the premixing chamber into a plurality of chambers to divert at least a portion of the refrigerated air entering from the refrigerated air inlet and at least a portion of the refrigerated air entering from the refrigerated air inlet into different chambers for one or more mixing sessions. The resulting mixed gas flows to the evaporator of the refrigerator through the air outlet.

[0007] Optionally, in one embodiment, the housing further includes a second partition, which is disposed between the refrigerated air inlet and the frozen air inlet. The second partition is connected to each of the first partitions to divide each of the chambers into a mixing area and a frozen air area. The frozen air area is connected to the frozen air inlet, and the second partition is provided with a first through hole, which connects the refrigerated air inlet and the frozen air inlet.

[0008] Optionally, in one embodiment, the second partition is inclinedly disposed between the refrigerated air inlet and the frozen air inlet, so that at least a portion of the refrigerated air entering through the refrigerated air inlet flows along the extending direction of the second partition. The extending direction of the second partition and the distribution direction of the plurality of chambers are inclinedly disposed, so that the area of ​​the mixing region of the plurality of chambers increases sequentially along the distribution direction of the plurality of chambers.

[0009] Optionally, in one embodiment, the plurality of chambers include at least one first chamber and at least one second chamber, wherein the first chamber is closer to the refrigeration air inlet than the second chamber;

[0010] The housing further includes a third partition, which connects the second partition and a side wall on the housing where the refrigerated air inlet is located, to enclose and form a refrigerated air inlet channel. The third partition connects at least two adjacent first partitions to cover at least a portion of the mixing area in at least one of the first compartments. When the third partition covers at least a portion of the mixing area in at least two of the first compartments, the ratio of the area covered by the third partition in the mixing area to the area of ​​the mixing area tends to decrease in the distribution direction of the plurality of compartments.

[0011] The mixing area of ​​the second compartment has a fully open structure.

[0012] Optionally, in one embodiment, the housing includes a first wall and a second wall disposed opposite to each other, the refrigerated air inlet is disposed in the first wall, and the frozen air inlet is disposed in the second wall;

[0013] And / or, the premixed structure further includes a first grille disposed at the air outlet.

[0014] Optionally, in one embodiment, the premixed structure further includes a second grille disposed on the outer surface of the first wall, so that a portion of the refrigerated air entering from the refrigerated air inlet flows toward the air outlet through the gaps in the second grille.

[0015] Optionally, in one embodiment, the first grille is disposed on one side of the first wall and the second wall;

[0016] The housing also includes a constriction, which connects the premixing chamber to the first grid, and the constriction gradually narrows in the direction from the premixing chamber toward the first grid;

[0017] A gap exists between the first grille and the constriction to form an air inlet, through which a portion of the refrigerated air enters the constriction and / or the premixing chamber.

[0018] This application also proposes a refrigerator, the refrigerator including an evaporator and an air duct assembly, wherein the air duct assembly includes a refrigeration return air duct, a freezing return air duct and a premixing structure as described above, the refrigeration air inlet of the premixing structure is connected to the refrigeration return air duct, the freezing air inlet of the premixing structure is connected to the freezing return air duct, and the air outlet of the premixing structure is connected to the evaporator.

[0019] Optionally, in one embodiment, the refrigerator further includes a refrigerator compartment and a freezer compartment, the freezer compartment being disposed on one side of the refrigerator compartment, the refrigerator compartment being connected to the refrigerator return air duct, and the freezer compartment being connected to the freezer return air duct;

[0020] The freezer compartment includes a freezer liner, and the refrigerator also includes a fourth partition disposed in the freezer compartment, the fourth partition and the freezer liner enclosing a receiving cavity; the evaporator and the premixing structure are disposed in the receiving cavity, and the premixing structure is disposed below the evaporator.

[0021] Optionally, in one embodiment, the receiving cavity is provided with a volute and a fan, the fan is disposed on the side of the volute near the fourth partition, and the fan is located above the evaporator; the air duct assembly further includes a freezing air duct, the freezing air duct is connected to the freezing chamber and the evaporator respectively, and the volute and the fourth partition enclose the freezing air duct to form the freezing air duct;

[0022] And / or, the air duct assembly further includes a refrigerated air duct, which is connected to the refrigerated compartment and the evaporator respectively.

[0023] The premixed structure provided in this application can be used in refrigerators to premix the high-temperature refrigeration return air and the low-temperature freezing return air multiple times before they enter the evaporator. This process maximizes the removal of moisture from the refrigeration return air, reduces its moisture content, and improves the temperature and humidity uniformity of the mixed gas flowing into the evaporator. Consequently, it improves the temperature uniformity of the evaporator surface, mitigates the temperature boundary phenomenon, and effectively reduces the frost rate on the evaporator surface. This addresses the problems of uneven frost thickness distribution and frost blockage of evaporator channels, thereby reducing defrosting energy consumption, improving evaporator heat exchange efficiency, and enhancing the performance stability of the refrigerator. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the premixed structure from a first perspective in one embodiment provided in this application.

[0026] Figure 2 A schematic diagram of the premixed structure from a second perspective in one embodiment provided in this application.

[0027] Figure 3 A top view of a premixed structure provided in one embodiment of this application.

[0028] Figure 4 for Figure 3 Sectional view along the AA direction.

[0029] Figure 5 A schematic diagram of the refrigerator from a first-view perspective in one embodiment provided in this application.

[0030] Figure 6 for Figure 5 Sectional view in the BB direction.

[0031] Figure 7 for Figure 6 A magnified view of a portion at point C.

[0032] Figure 8 A schematic diagram of the refrigerator from a first-view perspective in one embodiment provided in this application.

[0033] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0034] The attached figures are labeled as follows:

[0035] 1. Premixed structure; 2. Evaporator; 4. Refrigerator compartment; 5. Freezer compartment; 6. Volute; 7. Fan; 8. Fourth partition; 10. Refrigerator; 11. Shell; 12. First grille; 13. Second grille; 31. Refrigerator return air duct; 32. Freezer return air duct; 33. Freezer air duct; 34. Refrigerator air duct; 41. Refrigerator return air vent; 51. Freezer return air vent; 52. Freezer compartment liner; 53. Receiving cavity; 101. First partition; 102. Second partition; 103. Third partition 104. Plate; 105. First wall; 106. Second wall; 107. Third wall; 108. Fourth wall; 109. Narrowing; 110. Air inlet; 111. Chamber; 112. Premixing chamber; 113. Refrigerated air inlet; 114. Air outlet; 1101. Mixing area; 1102. Refrigerated air area; 1103. First compartment; 1104. Second compartment; 1021. First through hole; 1031. Second through hole; 1032. Grille structure. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] In the description of this application, the terms "first," "second," or similar expressions are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more features.

[0038] In the description of this application, the terms "multiple", "various" or similar expressions refer to two or more species, such as two, three, four, five, six, seven, eight, nine, or ten species.

[0039] In the description of this application, the terms "comprising," "having," or similar expressions mean "including but not limited to."

[0040] In the description of this application, unless otherwise expressly specified and limited, the terms "connection," "linked," "connected," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. Fixed connections include, but are not limited to, one or more of welding, riveting, and bonding; detachable connections include, but are not limited to, one or more of plug-in connections, threaded connections, pin connections, elastic deformation connections, and locking connections. Connections can be mechanical or electrical; they can be direct or indirect through an intermediate medium; and they can represent internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] It should be noted that in the description of this application, terms such as "front", "rear", "upper", "lower", "top", and "bottom" that indicate direction or positional relationship are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0042] This application provides a premixed structure for use in refrigerators. It premixes the higher-temperature refrigeration return air and the lower-temperature freezing return air multiple times before they enter the evaporator. This reduces the moisture content of the refrigeration return air, thereby improving the temperature and humidity uniformity of the mixed gas flowing into the evaporator. This improves the temperature uniformity of the evaporator surface, reduces temperature boundary phenomena, and effectively reduces the frost rate on the evaporator surface. This addresses the problems of uneven frost thickness distribution and frost clogging of evaporator channels, ultimately reducing defrosting energy consumption, improving evaporator heat exchange efficiency, and enhancing refrigerator performance stability. The following description, in conjunction with the accompanying drawings, will illustrate this further.

[0043] In the embodiments of this application, such as Figures 1 to 8As shown, the premixing structure 1 includes a housing 11, a premixing chamber 111 inside the housing 11, and a refrigeration air inlet 112, a freezing air inlet 113, and an air outlet 114 on the housing 11. The refrigeration air inlet 112 is used to communicate with the refrigeration return air duct 31 of the refrigerator 10, and the freezing air inlet 113 is used to communicate with the freezing return air duct 32 of the refrigerator 10. The housing 11 includes a plurality of first partitions 101, which divide the premixing chamber 111 into a plurality of chambers 110 to divert at least a portion of the refrigeration air entering from the refrigeration air inlet 112 and at least a portion of the freezing air entering from the freezing air inlet 113 into different chambers 110 for one or more mixing, so as to improve the mixing of refrigeration air and freezing air, reduce the crossflow of refrigeration air and freezing air in the distribution direction of the plurality of first partitions 101, improve the uniform distribution of return air volume at the front end of the evaporator 2, and the mixed gas formed flows to the evaporator 2 of the refrigerator 10 through the air outlet 114.

[0044] It should be noted that multiple first partitions 101 are arranged sequentially at intervals along a specific direction, such that multiple chambers 110 are distributed sequentially in that specific direction. The specific direction may be the length direction, width direction, or thickness direction of the premixing chamber 111.

[0045] To further improve the diversion effect of the refrigeration air entering through the refrigeration air inlet 113, further reference is made to some embodiments of this application. Figure 1 and Figure 2 The housing 11 also includes a second partition 102, which is disposed between the refrigerated air inlet 112 and the frozen air inlet 113. The second partition 102 is connected to each of the first partitions 101 to divide each chamber 110 into a mixing region 1101 and a frozen air region 1102. The frozen air region 1102 communicates with the frozen air inlet 113, and the second partition 102 is provided with a first through hole 1021, which connects the refrigerated air inlet 112 and the frozen air inlet 113. Part of the frozen air entering through the frozen air inlet 113 enters the frozen air region 1102. Due to the blocking effect of the second partition 102, the frozen air mainly enters the mixing region 1101 through the first through hole 1021 to mix with the refrigerated air, which can improve the phenomenon of frozen air rapidly accumulating in one or part of the chamber 110.

[0046] In some embodiments of this application, there are multiple first through holes 1021, and multiple first through holes 1021 are arranged sequentially at intervals along the extension direction of the second partition 102. The refrigeration air entering from the refrigeration air inlet 113 can enter different mixing regions 1101 through different first through holes 1021, further improving the phenomenon of refrigeration air rapidly accumulating in one or part of the chamber 110.

[0047] In some embodiments of this application, see further reference. Figure 1 and Figure 2 When there are multiple first through holes 1021, at least some of the first through holes 1021 are arranged opposite to the refrigerated air inlet 112. Part of the refrigerated air entering from the refrigerated air inlet 113 is directly mixed with the refrigerated air entering from the refrigerated air inlet 112 through the first through holes 1021 to adjust the temperature at the refrigerated air inlet 112.

[0048] In some embodiments of this application, see further reference. Figure 1 and Figure 2 The second partition 102 is inclinedly disposed between the refrigerated air inlet 112 and the refrigerated air inlet 113, so that at least part of the refrigerated air entering through the refrigerated air inlet 112 flows along the extension direction of the second partition 102. That is, the second partition 102 has a guiding function, which improves the phenomenon of refrigerated air gathering near the refrigerated air inlet 112, thereby further improving the premixing effect. The extension direction of the second partition 102 and the distribution direction of the multiple chambers 110 are inclinedly disposed, so that the area of ​​the mixing region 1101 of the multiple chambers 110 increases sequentially along the distribution direction of the multiple chambers 110, which can extend the flow path of the refrigerated air, and the refrigerated air and the refrigerated air can be mixed multiple times along the distribution direction of the multiple chambers 110, and the mixing degree of the refrigerated air and the refrigerated air gradually increases along the distribution direction of the multiple chambers 110.

[0049] Further reading Figure 1 and Figure 2 The multiple chambers 110 include at least one first chamber 1103 and at least one second chamber 1104. The first chamber 1103 is closer to the refrigerated air inlet 112 than the second chamber 1104. The shell 11 also includes a third partition 103, which connects the second partition 102 and the side wall of the shell 11 on which the refrigerated air inlet 112 is located, to enclose and form a refrigerated air inlet channel. The third partition 103 connects at least two adjacent first partitions 101 to cover at least a portion of the mixing area 1101 in at least one first chamber 1103. The third partition 103 has the function of blocking air from entering the air outlet 114, effectively improving the phenomenon that a large amount of unmixed or insufficiently mixed refrigerated air and / or frozen air is directly discharged from the air outlet 114. When the third partition 103 covers at least a portion of the mixing region 1101 in at least two of the first chambers 1103, the ratio of the area covered by the third partition 103 in the mixing region 1101 to the area of ​​the mixing region 1101 decreases in the distribution direction of the plurality of chambers 110. Furthermore, the second chamber 1104 is a fully open structure, meaning that the air volume entering the air outlet 114 from the chamber 110 gradually increases in the distribution direction of the plurality of chambers 110. This allows the refrigerated air and the frozen air to be fully mixed before being discharged through the air outlet 114, thereby further improving the premixing effect.

[0050] It should be noted that by adjusting the opening area of ​​the third partition 103, the ratio of the coverage area of ​​the third partition 103 in the mixing region 1101 to the area of ​​the mixing region 1101 decreases in the distribution direction of the multiple chambers 110. For example, see [link to relevant documentation]. Figure 1 and Figure 2 In the direction away from the cold air inlet 112, the third partitions 103 of the multiple first chambers 1103 are respectively a completely closed plate structure, a plate structure with a second through hole 1031, and a grid structure 1032.

[0051] In some embodiments of this application, see further reference. Figure 1 and Figure 2 The housing 11 includes a first wall 104 and a second wall 105 disposed opposite to each other. A refrigerated air inlet 112 is disposed on the first wall 104, and a frozen air inlet 113 is disposed on the second wall 105, so that at least a portion of the refrigerated air entering through the refrigerated air inlet 112 and at least a portion of the frozen air entering through the frozen air inlet 113 flow in opposite directions, thereby further improving the mixing of the refrigerated air and the frozen air.

[0052] It is understood that, in some embodiments of this application, continued reference will be made to... Figure 1 and Figure 2 The housing 11 also includes a third wall 106 and a fourth wall 107 disposed opposite to each other. The first wall 104, the second wall 105, the third wall 106, and the fourth wall 107 enclose a premixing cavity 111. One end of the second partition 102 is disposed on the first wall 104 or the third wall 106, and the other end of the second partition 102 extends toward the second wall 105. The other end of the second partition 102 may be connected to or not in contact with the second wall 105, and the other end of the second partition 102 may be connected to or not in contact with the fourth wall 107. For example, the other end of the second partition 102 is not in contact with the second wall 105, and the other end of the second partition 102 is not in contact with the fourth wall 107, so as to increase the air volume entering the air outlet 114 from the chamber 110 farthest from the refrigerated air inlet 112. Multiple first partitions 101 are arranged sequentially at intervals along the length of the premixing chamber 111, and the first partitions 101 connect the first wall 104 and the second wall 105.

[0053] In some embodiments of this application, see further reference. Figure 1 and Figure 2The premixed structure 1 also includes a first grille 12, which is disposed at the air outlet 114. On the one hand, when the mixed gas of refrigerated air and frozen air flows through the first grille 12, the condensate produced will adhere to the first grille 12, that is, the first grille 12 has the function of intercepting condensate, thereby further reducing the water content of the mixed gas and further reducing the frosting rate on the surface of the evaporator 2; on the other hand, the first grille 12 has the function of rectifying the mixed gas, so that the mixed gas enters the evaporator 2 evenly.

[0054] In some embodiments of this application, see further reference. Figures 1 to 4 The first grille 12 is disposed on one side of the first wall 104 and the second wall 105; the housing 11 also includes a constriction 108, which connects the premixing chamber 111 and the first grille 12, and the constriction 108 gradually narrows in the direction of the premixing chamber 111 toward the first grille 12; there is a gap between the first grille 12 and the constriction 108 to form an air inlet 109, and part of the refrigerated air enters the constriction 108 and / or the premixing chamber 111 through the air inlet 109, thereby remixing with the mixed gas in the constriction 108 and / or the premixing chamber 111, and then flowing out through the air outlet 114, further improving the mixing uniformity of the refrigerated air and the refrigerated air.

[0055] In some embodiments of this application, see further reference. Figures 1 to 4 The premixed structure 1 also includes a second grille 13, which is disposed on the outer surface of the first wall 104 so that a portion of the refrigerated air entering through the refrigerated air inlet 113 flows toward the air outlet 114 through the gaps in the second grille 13. This portion of the refrigerated air can be mixed with the mixed gas at the air outlet 114 and then enter the evaporator 2; this portion of the refrigerated air can also enter the constriction 108 and / or the premixing chamber 111 through the air inlet 109 to be mixed again with the mixed gas in the constriction 108 and / or the premixing chamber 111, and then flow to the evaporator 2 through the air outlet 114.

[0056] In summary, Figures 1 to 4The premixing principle of the premixing structure 1 shown is as follows: the refrigerated air entering through the refrigerated air inlet 112 flows along the extension direction of the second partition 102. A small portion of the refrigerated air flows out from the second through-hole 1031 to the constriction 108, while most of the refrigerated air is mixed with the freezing air once or multiple times in the mixing area 1101 of each chamber 110. Then, it flows out through the grille structure 1032 and the second chamber 1104 to the constriction 108, and then flows out of the premixing structure 1 through the first grille 12 at the air outlet 114. A portion of the freezing air entering through the freezing air inlet 113 enters each chamber 110. The refrigerated air zone 1102 enters the mixing zone 1101 through the first through hole 1021 to mix with the refrigerated air and then flows out of the premixing structure 1. Some refrigerated air does not enter the premixing chamber 111 but flows towards the air outlet 114 through the gaps of the second grille 13. This refrigerated air can mix with the mixed gas at the air outlet 114 and then flow out. This refrigerated air can also enter the constriction 108 and / or the premixing chamber 111 through the air inlet 109 to mix with the mixed gas in the constriction 108 and / or the premixing chamber 111 again, and then flow out of the premixing structure 1 through the first grille 12 at the air outlet 114.

[0057] This application also provides a refrigerator, see further details. Figures 1 to 8 The refrigerator 10 includes an evaporator 2 and an air duct assembly. The air duct assembly includes a refrigerator return air duct 31, a freezer return air duct 32, and a premixing structure 1. The refrigerator air inlet 112 of the premixing structure 1 is connected to the refrigerator return air duct 31, the freezer air inlet 113 of the premixing structure 1 is connected to the freezer return air duct 32, and the air outlet 114 of the premixing structure 1 is connected to the evaporator 2. The specific structure of the premixing structure 1 is as described in the above embodiments. Since all the technical solutions of the above embodiments are adopted, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0058] In some embodiments of this application, see further reference. Figures 5 to 8 The refrigerator 10 also includes a refrigerator compartment 4 and a freezer compartment 5. The freezer compartment 5 is located on one side of the refrigerator compartment 4. The refrigerator compartment 4 is connected to the refrigerator return air duct 31. For example, the refrigerator compartment 4 is provided with a refrigerator return air vent 41, and the refrigerator compartment 4 is connected to the refrigerator return air duct 31 through the refrigerator return air vent 41. The freezer compartment 5 is connected to the freezer return air duct 32. For example, the freezer compartment 5 is provided with a freezer return air vent 51, and the freezer compartment 5 is connected to the freezer return air duct 32 through the freezer return air vent 51.

[0059] Furthermore, the freezer compartment 5 includes a freezer compartment liner 52, and the refrigerator 10 also includes a fourth partition 8 disposed within the freezer compartment 5. The fourth partition 8 and the freezer compartment liner 52 enclose a receiving cavity 53. The evaporator 2 and the premixing structure 1 are disposed within the receiving cavity 53, and the premixing structure 1 is disposed below the evaporator 2. The first grille 12 of the premixing structure 1 is disposed facing the air inlet end of the evaporator 2. The freezer return air duct 32 is disposed within the freezer compartment 5. The freezer return air duct 32 is disposed, for example, within the freezer compartment 5, and a portion of the freezer compartment liner 52 and a portion of the fourth partition 8 enclose the freezer return air duct 32.

[0060] In some embodiments of this application, see further reference. Figures 5 to 8 The cavity 53 contains a volute 6 and a fan 7. The fan 7 is located on the side of the volute 6 near the fourth partition 8 and is located above the evaporator 2. The air duct assembly also includes a freezing air duct 33. The volute 6 and the fourth partition 8 enclose each other to form the freezing air duct 33. The freezing air duct 33 is connected to the freezer chamber 5 and the evaporator 2 respectively.

[0061] In some embodiments of this application, see further reference. Figures 5 to 8 The air duct assembly also includes a refrigerated air duct 34, which is disposed in the refrigerator compartment 4 and is connected to both the refrigerator compartment 4 and the evaporator 2.

[0062] In the refrigerator 10 of this application embodiment, under the action of the fan 7, the refrigeration air enters the premixing structure 1 from the refrigerator compartment 4 through the refrigeration return air duct 31, and the freezing air enters the premixing structure 1 from the freezer compartment 5 through the freezing return air duct 32. The mixed gas formed by the refrigeration air and the freezing air after multiple mixing in the premixing structure 1 flows out of the premixing structure 1 and enters the evaporator 2. The air cooled by the evaporator 2 is transported to the refrigerator compartment 4 through the refrigeration air duct 34 and to the freezer compartment 5 through the freezing air duct 33 under the action of the fan 7, thereby forming an air circulation.

[0063] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0064] The above provides a detailed description of a sealing structure and a refrigerator provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A premixed structure (1), characterized in that, Includes a housing (11), the housing (11) having a premixing chamber (111) inside, the housing (11) having a refrigeration air inlet (112), a freezing air inlet (113) and an air outlet (114) on the housing (11), the refrigeration air inlet (112) being used to communicate with the refrigeration return air duct (31) of the refrigerator (10), and the freezing air inlet (113) being used to communicate with the freezing return air duct (32) of the refrigerator (10); The housing (11) includes a plurality of first partitions (101), which divide the premixing chamber (111) into a plurality of chambers (110) to divert at least a portion of the refrigerated air entering from the refrigerated air inlet (112) and at least a portion of the frozen air entering from the frozen air inlet (113) into different chambers (110) for one or more mixing sessions. The resulting mixed gas flows through the air outlet (114) to the evaporator (2) of the refrigerator (10).

2. The premixed structure (1) according to claim 1, characterized in that, The housing (11) further includes a second partition (102), which is disposed between the refrigerated air inlet (112) and the frozen air inlet (113). The second partition (102) is connected to each of the first partitions (101) to divide each of the chambers (110) into a mixing region (1101) and a frozen air region (1102). The frozen air region (1102) is connected to the frozen air inlet (113). The second partition (102) is provided with a first through hole (1021), which is connected to the refrigerated air inlet (112) and the frozen air inlet (113).

3. The premixed structure (1) according to claim 2, characterized in that, The second partition (102) is inclinedly disposed between the refrigerated air inlet (112) and the frozen air inlet (113) so that at least part of the refrigerated air entering through the refrigerated air inlet (112) flows along the extension direction of the second partition (102). The extension direction of the second partition (102) and the distribution direction of the plurality of chambers (110) are inclinedly disposed so that the area of ​​the mixing region (1101) of the plurality of chambers (110) increases sequentially along the distribution direction of the plurality of chambers (110).

4. The premixed structure (1) according to claim 3, characterized in that, The plurality of chambers (110) include at least one first chamber (1103) and at least one second chamber (1104), wherein the first chamber (1103) is closer to the refrigeration air inlet (112) than the second chamber (1104); The housing (11) further includes a third partition (103), which connects the second partition (102) and a side wall on the housing (11) where the refrigerated air inlet (112) is located, to enclose and form a refrigerated air inlet channel. The third partition (103) connects at least two adjacent first partitions (101) to cover at least a portion of the mixing area (1101) in at least one of the first chambers (1103). When the third partition (103) covers at least a portion of the mixing area (1101) in at least two of the first chambers (1103), the ratio of the area covered by the third partition (103) in the mixing area (1101) to the area of ​​the mixing area (1101) decreases in the distribution direction of the plurality of chambers (110). The mixing area (1101) of the second compartment (1104) is a fully open structure.

5. The premixed structure (1) according to any one of claims 1 to 4, characterized in that, The housing (11) includes a first wall (104) and a second wall (105) disposed opposite to each other, the refrigerated air inlet (112) is disposed on the first wall (104), and the frozen air inlet (113) is disposed on the second wall (105); And / or, the premixed structure (1) further includes a first grille (12) disposed at the air outlet (114).

6. The premixed structure (1) according to claim 5, characterized in that, The premixed structure (1) further includes a second grille (13), which is disposed on the outer surface of the first wall (104) so ​​that a portion of the refrigerated air entering through the refrigerated air inlet (113) flows toward the air outlet (114) through the gaps in the second grille (13).

7. The premixed structure (1) according to claim 5, characterized in that, The first grille (12) is disposed on one side of the first wall (104) and the second wall (105); The housing (11) further includes a constriction (108) that connects the premixing chamber (111) to the first grille (12), and the constriction (108) gradually narrows in the direction of the premixing chamber (111) toward the first grille (12); A gap exists between the first grille (12) and the constriction (108) to form an air inlet (109), through which a portion of the refrigerated air enters the constriction (108) and / or the premixing chamber (111).

8. A refrigerator (10), characterized in that, The device includes an evaporator (2) and an air duct assembly, wherein the air duct assembly includes a refrigerated return air duct (31), a frozen return air duct (32), and a premixed structure (1) as described in any one of claims 1 to 7, wherein the refrigerated air inlet (112) of the premixed structure (1) is connected to the refrigerated return air duct (31), the frozen air inlet (113) of the premixed structure (1) is connected to the frozen return air duct (32), and the air outlet (114) of the premixed structure (1) is connected to the evaporator (2).

9. The refrigerator (10) according to claim 8, characterized in that, The refrigerator (10) further includes a refrigerator compartment (4) and a freezer compartment (5). The freezer compartment (5) is located on one side of the refrigerator compartment (4). The refrigerator compartment (4) is connected to the refrigerator return air duct (31), and the freezer compartment (5) is connected to the freezer return air duct (32). The freezer compartment (5) includes a freezer compartment liner (52), and the refrigerator (10) also includes a fourth partition (8) disposed in the freezer compartment (5), the fourth partition (8) and the freezer compartment liner (52) forming a receiving cavity (53); the evaporator (2) and the premixed structure (1) are disposed in the receiving cavity (53), and the premixed structure (1) is disposed below the evaporator (2).

10. The refrigerator (10) according to claim 9, characterized in that, The receiving cavity (53) is provided with a volute (6) and a fan (7). The fan (7) is located on the side of the volute (6) near the fourth partition (8) and is located above the evaporator (2). The air duct assembly also includes a freezing air duct (33), which is connected to the freezing chamber (5) and the evaporator (2) respectively. The volute (6) and the fourth partition (8) enclose the freezing air duct (33). And / or, the air duct assembly further includes a refrigerated air duct (34) which is connected to the refrigerated compartment (4) and the evaporator (2) respectively.

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