Refrigerator for preventing air duct of freezer compartment from moving downward

Abstract

The present invention provides a refrigerator capable of preventing a freezer chamber air duct from moving downward, comprising a cabinet, an evaporator, a freezer chamber air duct and an air supply fan, wherein the cabinet comprises a freezer inner tank located at the bottom, wherein a cooling chamber and a freezer chamber located above the cooling chamber are defined in the freezer inner tank; the evaporator and the air supply fan are both arranged in the cooling chamber, and the freezer chamber air duct is arranged on the inner side of the rear wall of the freezer inner tank; wherein a rear section of the bottom wall of the freezer inner tank is formed with at least one first limiting boss protruding upward, and each first limiting boss is formed with a limiting groove; a lower section of the freezer chamber air duct is formed with a mating portion mating with the limiting groove, and the mating portion mating with the limiting groove to prevent the freezer chamber air duct from moving downward.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to a refrigerator capable of preventing a freezing chamber air duct from moving downward. Background Art

[0002] In existing refrigerators, the freezer compartment is generally located at the bottom of the refrigerator, the evaporator is located at the rear of the outer side of the freezer compartment, and the compressor compartment is located at the rear of the freezer compartment. The freezer compartment needs to make way for the compressor compartment, which makes the freezer compartment irregular and limits the depth of the freezer compartment. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide a refrigerator that overcomes the above problems or at least partially solves the above problems.

[0004] A further object of the present invention is to improve the stability of the freezer compartment air duct installation and reduce the space occupied by the cooling compartment.

[0005] The present invention provides a refrigerator, comprising:

[0006] The box body includes a freezing liner located at the bottom, wherein the freezing liner defines a cooling chamber and a freezing chamber located above the cooling chamber;

[0007] an evaporator disposed in the cooling chamber and configured to cool the airflow entering the cooling chamber to form a cooling airflow;

[0008] a freezer compartment air duct disposed on the inner side of the rear wall of the freezer liner and configured to convey at least a portion of the cooling airflow into the freezer compartment;

[0009] an air supply fan, disposed in the cooling chamber and configured to force the cooling air flow into the freezing chamber air duct;

[0010] Among them, the rear section of the bottom wall of the freezing inner container is formed with at least one first limiting boss protruding upward, and each first limiting boss forms a limiting groove; the lower section of the freezer compartment air duct is formed with a matching portion that cooperates with the limiting groove, and the matching portion cooperates with the limiting groove to prevent the freezer compartment air duct from moving downward.

[0011] Optionally, the areas of the two transverse side walls of the freezing inner container corresponding to the cooling chamber protrude toward the cooling chamber to form a second limiting boss respectively;

[0012] The refrigerator also includes a cover plate, which constitutes the top wall and front wall of the cooling chamber, and together with the two second limiting bosses, the sections of the side walls of the two freezing liner located in front of the corresponding second limiting bosses, the bottom wall of the freezing liner and the rear wall of the freezing liner, define the cooling chamber.

[0013] Optionally, the freezer compartment air duct includes an air duct front cover plate located at the front side and an air duct rear cover plate located at the rear side and defining an air supply air duct with the air duct front cover plate;

[0014] The rear cover plate of the air duct includes a rear vertical plate section extending vertically at the lower part and a joint section extending forward and downward from the lower end of the rear vertical plate section, the joint section is located below the front cover plate of the air duct, and the front end of the joint section and the lower end of the front cover plate of the air duct define an air inlet of the air duct;

[0015] The engaging section is formed with a mating portion.

[0016] Optionally, the air supply fan is located behind the evaporator, and includes a casing and an impeller disposed in the casing, the casing includes a lower box body and an upper cover body buckled on the lower box body, and the rear end of the upper cover body and the rear end of the lower box body define an air outlet of the casing;

[0017] The front cover plate of the air duct is detachably connected to the upper cover body, and the rear cover plate of the air duct is detachably connected to the lower box body through the joint section, so that the air outlet of the casing is connected to the air inlet of the air duct.

[0018] Optionally, a third limiting boss protruding upward is formed on both lateral sides of the bottom wall of the freezing tank near the rear end, and the two third limiting bosses and the section of the bottom wall of the freezing tank located behind the evaporator define a space for arranging an air supply fan.

[0019] Optionally, the bottom wall of the freezing container includes, from back to front, a first inclined straight section extending obliquely forward and downward, a second inclined straight section extending obliquely forward and downward, a third inclined straight section extending obliquely forward and downward, a water receiving section located below the evaporator, and a front bent section extending forward from the water receiving section.

[0020] At least one first limiting boss is formed at a position of the first inclined straight section adjacent to the rear end.

[0021] Optionally, the bottom wall of the lower box body includes, from back to front, a first horizontal straight section, a fourth inclined straight section extending obliquely forward and downward, and a fifth inclined straight section extending obliquely forward and downward, which are sequentially connected;

[0022] The first horizontal straight section is located above the rear section of the first inclined straight section and is connected to the joining section;

[0023] The fourth inclined straight segment is located above the front section of the first inclined straight segment and the second inclined straight segment and is parallel to the second inclined straight segment. The fifth inclined straight segment is located above the third inclined straight segment and is parallel to the third inclined straight segment.

[0024] Optionally, the air supply fan is a centrifugal fan, and the rotating shaft of the impeller is perpendicular to the fourth inclined straight section;

[0025] The top wall of the upper cover body forms an air inlet for the organic shell.

[0026] Optionally, the angle between the projection line of the first inclined straight section on the vertical plane parallel to the side wall of the freezing inner container and the horizontal straight line extending forward and backward is 5° to 15°;

[0027] The included angle between the projection line of the second inclined straight section on the vertical plane parallel to the side wall of the freezing container and the horizontal straight line extending forward and backward is 30° to 40°;

[0028] The included angle between the projection line of the third inclined straight section on the vertical plane parallel to the side wall of the freezing inner container and the horizontal straight line extending forward and backward is 5° to 15°.

[0029] Optionally, the box also includes:

[0030] The variable temperature inner tank is located above the freezing inner tank and defines a variable temperature chamber therein;

[0031] The temperature-changing chamber air duct is configured to be controllably connected to the freezing chamber air duct so as to transport part of the cooling airflow in the freezing chamber air duct to the temperature-changing chamber.

[0032] The refrigerator of the present invention defines a cooling chamber in the bottom space of the freezing inner container and defines a freezing chamber above the cooling chamber, so that the cooling chamber occupies the lower space in the freezing inner container, which is convenient for defining a pressurizing chamber behind the cooling chamber. The freezing chamber does not need to give way to the pressurizing chamber, thereby ensuring the storage capacity of the freezing chamber. In addition, by specially designing the bottom wall of the freezing inner container and the lower section of the freezing chamber air duct, it is possible to avoid collision during the transportation of the refrigerator, which may cause the freezing chamber air duct to fall, thereby ensuring the refrigeration effect during the operation of the refrigerator.

[0033] Furthermore, in the refrigerator of the present invention, the rear cover of the air duct is connected to the lower box body of the casing through a specially constructed joint section, which promotes the air flow in the casing to smoothly enter the freezer chamber air duct and reduce noise; in addition, the shape of the casing and the bottom wall of the freezer liner are matched to make the spatial layout in the cooling chamber more compact and reduce the space occupied by the cooling chamber, thereby providing a larger storage volume for the freezer chamber above the cooling chamber.

[0034] Furthermore, in the refrigerator of the present invention, the housing of the freezer air duct and the air supply fan adopts a split design to achieve modularization, facilitate disassembly and transportation, and improve the yield rate.

[0035] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0037] Figure 1 is a front view of a refrigerator according to an embodiment of the present invention;

[0038] Figure 2 is a three-dimensional schematic diagram of a refrigerator according to an embodiment of the present invention;

[0039] Figure 3 is a schematic diagram of a freezer container of a refrigerator according to an embodiment of the present invention;

[0040] Figure 4 is a front view of an assembly of a freezer liner, an evaporator, an air supply fan and a freezer compartment air duct of a refrigerator according to an embodiment of the present invention;

[0041] Figure 5 yes Figure 4 The cross-sectional view in the AA direction;

[0042] Figure 6 yes Figure 5 Enlarged view of area A in the middle;

[0043] Figure 7 is a schematic diagram of the assembly of a freezer compartment air duct and an air supply fan of a refrigerator according to an embodiment of the present invention;

[0044] Figure 8 is an exploded schematic diagram of a freezer compartment air duct and an air supply fan of a refrigerator according to an embodiment of the present invention;

[0045] Fig. 9 is a schematic diagram of an upper cover of a casing of an air supply fan of a refrigerator according to an embodiment of the present invention; and

[0046] Fig.10 Schematic diagram of the assembly of the lower box body and the impeller of the air supply fan of the refrigerator according to one embodiment of the present invention. DETAILED DESCRIPTION

[0047] This embodiment provides a refrigerator 10. Figures 1 to 10 In the following description, the directions or positional relationships indicated by "front", "rear", "up", "down", "left", "right", etc. are directions or positional relationships based on the refrigerator 10 itself as a reference. Figure 5 , Figure 6 The direction indicated, such as Figure 1 and Figure 4As shown, “lateral” refers to a direction parallel to the width direction of the refrigerator 10 .

[0048] Figure 1 is a front view of a refrigerator 10 according to an embodiment of the present invention, Figure 2 is a perspective schematic diagram of a refrigerator 10 according to an embodiment of the present invention.

[0049] like Figure 1 and Figure 2 As shown, the refrigerator 10 may generally include a box body 100, the box body 100 includes an outer shell 110 and a storage liner arranged inside the outer shell 110, the space between the outer shell 110 and the storage liner is filled with a heat preservation material (forming a foaming layer), and a storage compartment is defined in the storage liner. The storage liner may generally include a freezing liner 130, a refrigerating liner 120, etc. The storage compartment includes a freezing chamber 132 defined by the freezing liner 130 and a refrigerating chamber 121 defined by the refrigerating liner 120. A door body is also provided on the front side of the storage liner to open or close the storage compartment. Figure 1 , Figure 2 The doors have all been hidden.

[0050] As those skilled in the art can appreciate, the refrigerator 10 of this embodiment may further include an evaporator 101, an air supply fan 103, a compressor, a condenser (not shown), and a throttling element (not shown), etc. The evaporator 101 is connected to the compressor, the condenser, and the throttling element via a refrigerant pipeline to form a refrigeration cycle, and the temperature is reduced when the compressor is started to cool the air flowing through it.

[0051] In particular, in this embodiment, if Figure 1 , Figure 2 As shown, the freezing liner 130 is located at the lower part of the box body 100, and a cooling chamber is defined therein at the bottom. The evaporator 101 is arranged in the cooling chamber to cool the air flow entering the cooling chamber to form a cooling air flow, and the freezing chamber 132 defined by the freezing liner 130 is located above the cooling chamber, so that the cooling chamber is at the lowest part of the box body 100.

[0052] The evaporator 101 as a whole can be placed horizontally in the cooling chamber in a flat cubic shape, that is, the length and width of the evaporator 101 are parallel to the horizontal plane, the thickness surface is placed perpendicular to the horizontal plane, and the thickness dimension is significantly smaller than the length dimension of the evaporator 101. By placing the evaporator 101 horizontally in the cooling chamber, the evaporator 101 is prevented from occupying more space, and the storage volume of the freezing chamber 132 above the cooling chamber is guaranteed.

[0053] In a conventional refrigerator 10, the freezer compartment 132 is located at the bottom of the refrigerator 10, and the compressor compartment is located at the rear of the freezer compartment 132. The freezer compartment 132 inevitably has to be made into an irregular space to make room for the compressor compartment, which reduces the storage capacity of the freezer compartment 132 and also brings about the following problems. On the one hand, the freezer compartment 132 is located at a relatively low position, and the user needs to bend over or squat significantly to take and put items in the freezer compartment 132, which is inconvenient for users, especially for the elderly. On the other hand, since the depth of the freezer compartment 132 is reduced, in order to ensure the storage volume of the freezer compartment 132, the space in the height direction of the freezer compartment 132 needs to be increased. When the user stores items in the freezer compartment 132, the items need to be stacked in the height direction, which is inconvenient for the user to find items. In addition, the items at the bottom of the freezer compartment 132 are easily blocked, making it difficult for the user to find them and forget them, resulting in deterioration and waste of the items. Furthermore, since the freezer compartment 132 is of an irregular shape and not a rectangular space, it is inconvenient to place some large and difficult to divide items in the freezer compartment 132.

[0054] The refrigerator 10 of this embodiment defines a cooling chamber in the bottom space of the freezing liner 130, and defines a freezing chamber 132 above the cooling chamber, so that the cooling chamber occupies the lower space in the freezing liner 130, raising the freezing chamber 132, reducing the degree of bending when the user takes and places items in the freezing chamber 132, and improving the user's experience. At the same time, the press cabin can be located behind the cooling chamber, and the freezing chamber 132 does not need to make way for the press cabin, so that the freezing chamber 132 is a rectangular space, so that the items can be stored in a flat-laying manner instead of in a stacked manner, which is convenient for users to find items and saves users' time and energy; at the same time, it is also convenient to place large items that are not easy to divide, solving the pain point that large items cannot be placed in the freezing chamber 132.

[0055] Generally, the refrigerator 10 further includes another storage liner located above the freezing liner 130, and the storage liner may be a variable temperature liner 131 or a refrigerating liner 120. In this embodiment, the variable temperature liner 131 is located above the freezing liner 130, and the refrigerating liner 120 is located above the variable temperature liner 131. The variable temperature liner 131 defines a variable temperature chamber 1311, such as Figure 1 , Figure 2 As shown, there are two temperature-variable inner containers 131 , which are distributed laterally, and each temperature-variable inner container 131 defines a temperature-variable chamber 1311 .

[0056] As is well known to those skilled in the art, the temperature in the refrigerator 121 is generally between 2°C and 10°C, preferably between 4°C and 7°C. The temperature in the freezer 132 is generally between -22°C and -14°C. The temperature of the variable temperature chamber 1311 can be adjusted to -18°C to 8°C at will. Different types of items have different optimal storage temperatures and different suitable storage locations. For example, fruit and vegetable foods are suitable for storage in the refrigerator 121, while meat foods are suitable for storage in the freezer 132.

[0057] A refrigeration air duct (not shown) may be defined in the refrigeration liner 120 , and a refrigeration evaporator (not shown) and a refrigeration fan (not shown) may be disposed in the refrigeration air duct to independently supply air to the refrigeration chamber 121 .

[0058] Driven by the air supply fan 103, the cooling air flow is respectively transported to the freezing chamber 132 and the temperature-changing chamber 1311 through the air duct. Figure 1 As shown, a freezer air duct 141 is provided on the inner side of the rear wall of the freezer liner 130, and the freezer air duct 141 is formed with a freezer air inlet 141a communicating with the freezer chamber 132 to deliver at least part of the cooling airflow into the freezer chamber 132. Generally, the rear wall of the freezer liner 130 is formed with a recessed portion that is recessed backwards and matches the freezer air duct 141, and the freezer air duct 141 is embedded in the recessed portion.

[0059] A variable temperature room air duct (not shown) may be provided on the rear side of the rear wall of each variable temperature inner liner 131, and a variable temperature room air inlet 131a connected to the air outlet of the variable temperature room air duct is formed on the rear wall of the variable temperature inner liner 131, and the variable temperature room air duct is configured to be connected to the freezer air duct 141 in a controllable manner to transport part of the cooling airflow of the freezer air duct 141 to the variable temperature room 1311.

[0060] like Figure 7 As shown, at least one first top opening 141g is formed at the top of the freezing chamber air duct 141, and the first top opening 141g corresponds to the air inlet of the temperature-changing chamber air duct one-to-one. The top wall of the freezing liner 130 is formed with at least one second top opening 130d corresponding to the at least one first top opening 141g, so that the first top opening 141g is connected to the air inlet of the temperature-changing chamber air duct through the second top opening 130d. A damper may be provided at the first top opening 141g of the freezing chamber air duct 141 to controllably open or close the first top opening 141g. Figure 1 As shown, there are two variable temperature inner tanks 131, and accordingly, there are two variable temperature room air ducts, and there are two first top openings 141g and two second top openings 130d.

[0061] In particular, in this embodiment, Figure 3 and Figure 6As shown, the rear section of the bottom wall of the freezing liner 130 is formed with at least one first limiting boss 130a protruding upward, and each first limiting boss 130a forms a limiting groove 130a1; the lower section of the freezer compartment air duct 141 is formed with a matching portion 141f matching with the limiting groove 130a1, and the matching portion 141f matches with the limiting groove 130a1 to prevent the freezer compartment air duct 141 from moving downward.

[0062] like Figure 3 As shown, there are two first limiting bosses 130a, which are spaced apart in the lateral direction. Accordingly, there are two matching portions 141f, which are spaced apart in the lateral direction.

[0063] Generally, the lower section of the freezer air duct 141 located in the freezer liner 130 will inevitably form a gap with the bottom wall of the freezer liner 130. After the refrigerator 10 is assembled, under normal circumstances, the first top opening 141g at the top of the freezer air duct 141 should be sealed with the second top opening corresponding to the top wall of the freezer liner 130.

[0064] When the refrigerator 10 is transported, it is easy to cause the freezer air duct 141 to fall when it is hit, so that a gap appears between the first top opening 141g at the top of the freezer air duct 141 and the second top opening 130d corresponding to the top wall of the freezing liner 130. During the operation of the refrigerator 10, the airflow in the variable temperature room 1311 will enter the freezing chamber 132 through the gap. Since the airflow temperature of the variable temperature room 1311 is generally higher than the airflow temperature of the freezing chamber 132, frost will form near the top of the freezer air duct 141, which will affect the temperature of the freezing chamber 132 and the delivery of the cooling airflow. In this embodiment, by making the above special design on the bottom wall of the freezing liner 130 and the lower section of the freezer air duct 141, it is possible to avoid the freezer air duct 141 falling due to collision during the transportation of the refrigerator 10, thereby ensuring the refrigeration effect during the operation of the refrigerator 10.

[0065] The freezing liner 130 and the cooling chamber are described in detail below:

[0066] like Figure 3 and Figure 4 As shown, in some embodiments, the two lateral side walls of the freezing liner 130 and the areas corresponding to the cooling chamber respectively protrude toward the cooling chamber to form a second limiting boss 130b respectively.

[0067] The refrigerator 10 further includes a cover plate, which forms the top wall and the front wall of the cooling chamber, and together with the two second limiting bosses 130b, the sections of the side walls of the two freezing liner 130 located in front of the corresponding second limiting bosses 130b, the bottom wall of the freezing liner 130 and the rear wall of the freezing liner 130, define the cooling chamber. Figure 2As shown, the cover plate includes a top cover 1021 and at least one front cover group 102, the top cover 1021 is located above the evaporator 101, and at least one front return air inlet is formed on the front side of each front cover group 102, so that the return air flow of the freezer chamber 132 enters the cooling chamber through the at least one front return air inlet and is cooled by the evaporator 101, thereby forming an air flow circulation between the cooling chamber and the freezer chamber 132.

[0068] In some embodiments, Figure 1 As shown, there are two front cover groups 102, which are distributed in the transverse direction. Two front return air inlets are formed on the front side of each front cover group 102, namely a first front return air inlet 102a and a second front return air inlet 102b.

[0069] A side return air inlet (not shown) is formed on the side wall of the freezing inner tank 130, and the side return air inlet is connected to the variable temperature inner tank 131 through a side return air channel (not shown), so that the return air flow of the variable temperature chamber 1311 can be transported to the cooling chamber for cooling by utilizing the side return air channel, thereby forming an air circulation between the variable temperature chamber 1311 and the cooling chamber.

[0070] Preferably, the side return air inlet is formed on the side wall of the freezing tank 130 in a section in front of the corresponding second limiting boss 130b, so that the side return air inlet is closer to the front, so that the return air flow of the variable temperature chamber 1311 flows from the front to the rear of the evaporator 101, extending the heat exchange path between the return air flow of the variable temperature chamber 1311 and the evaporator 101, thereby improving the heat exchange efficiency.

[0071] In some embodiments, Figure 3 and Figure 5 As shown, the bottom wall of the freezing inner container 130 includes, from back to front, a first inclined straight section 1301 extending obliquely forward and downward, a second inclined straight section 1302 extending obliquely forward and downward, a third inclined straight section 1303 extending obliquely forward and downward, a water receiving section 1304 located below the evaporator 101, and a front bent section 1305 extending forward by bending from the water receiving section 1304. The first position-limiting boss 130a mentioned above is formed near the rear end of the first inclined straight section 1301.

[0072] In this embodiment, by designing the bottom wall of the freezing tank 130 as the special structure as above, a certain space is reserved below the first inclined straight section 1301, the second inclined straight section 1302 and the third inclined straight section 1303, so as to facilitate the arrangement of the compressor cabin; and to facilitate the coordination with the shape of the casing of the air supply fan 103, thereby reducing the space occupied by the cooling chamber.

[0073] In some embodiments, the angle ε between the projection line of the first inclined straight section 1301 on the vertical plane parallel to the side wall of the freezing liner 130 and the horizontal straight line extending forward and backward can be 5° to 15°, for example, ε is 5°, 8°, 10°, 12°, 15°. The angle θ between the projection line of the second inclined straight section 1302 on the vertical plane parallel to the side wall of the freezing liner 130 and the horizontal straight line extending forward and backward can be 20° to 35°, for example, θ is 20°, 25°, 33°, 35°. The angle μ between the projection line of the third inclined straight section 1303 on the vertical plane parallel to the side wall of the freezing liner 130 and the horizontal straight line extending forward and backward can be 5° to 15°, for example, μ is 5°, 8°, 10°, 12°, 15°.

[0074] The evaporator 101 is arranged directly above the water receiving section 1304. The water receiving section 1304 can be funnel-shaped and is used to receive the condensed water of the evaporator 101. A drain outlet is formed at the lowest point of the water receiving section 1304. A drain pipe is connected to the drain outlet. The drain pipe discharges the condensed water of the evaporator 101 into an evaporating dish in the compressor cabin. Generally, the evaporating dish is arranged below the condenser, and the condensed water discharged into the evaporating dish absorbs the heat around the condenser to evaporate.

[0075] The air supply fan 103 is located at the rear of the evaporator 101, and includes a casing and an impeller 1031 arranged in the casing. The casing includes a lower box body 1032 and an upper cover body 1033 arranged on the lower box body 1032. The lower box body 1032 and the upper cover body 1033 can be snap-fitted and connected to facilitate the disassembly and assembly of the casing.

[0076] like Figure 3 As shown, a third limiting boss 130c protruding upward is formed on both lateral sides of the bottom wall of the freezing tank 130 near the rear end, and the two third limiting bosses 130c and the section of the bottom wall of the freezing tank 130 located behind the evaporator 101 define a space for arranging the air supply fan 103.

[0077] The third limiting boss 130c may include a first portion formed at the first inclined straight section 1301 and a second portion formed at the second inclined straight section 1302. The section of the bottom wall of the freezing container 130 located behind the evaporator 101 is defined by the first inclined straight section 1301, the second inclined straight section 1302 and the third inclined straight section 1303.

[0078] The third limiting boss 130c, the first inclined straight section 1301, the second inclined straight section 1302 and the third inclined straight section 1303 define an area for arranging the air supply fan 103. The aforementioned first limiting boss 130a should be located between the two third limiting bosses 130c.

[0079] Each third limiting boss 130c may be formed with a first mounting hole (not numbered). The housing of the air supply fan 103 is formed with second mounting holes 103c1 corresponding to the two first mounting holes, so that the housing of the air supply fan 103 is mounted on the bottom wall of the freezing container 130 by means of mounting members (e.g., screws) passing through the second mounting holes 103c1 and the first mounting holes in sequence. Figure 8 , Fig.10 As shown, a mounting plate 103c is formed on both lateral sides of the side wall of the lower box body 1032, and the mounting plate 103c is formed with a second mounting hole 103c1 corresponding to the corresponding first mounting hole.

[0080] The air supply fan 103 and the freezing chamber air duct 141 are described in detail below:

[0081] The rear end and the upper part of the upper cover body 1033 are open, that is, the upper cover body 1033 includes a top wall 103a and a first side wall 103d extending downward from the top wall 103a; correspondingly, the rear end and the lower part of the lower box body 1032 are open, and the lower box body 1032 includes a bottom wall 103b and a second side wall extending upward from the bottom wall 103b.

[0082] The air supply fan 103 may be a centrifugal fan. The top wall 103a of the upper cover 1033 forms a housing air inlet 1033a, and the rear end of the upper cover 1033 and the rear end of the lower box body 1032 define a housing air outlet.

[0083] The horizontal distance α between the front end surface of the casing of the air supply fan 103 and the rear end surface of the evaporator 101 can be 15mm to 35mm. For example, α is 15mm, 20mm, 25mm, 30mm, or 35mm to avoid frosting of the air supply fan 103 due to the small distance between the air supply fan 103 and the evaporator 101.

[0084] The bottom wall of the lower box body 1032 of the housing may include, from back to front, a first horizontal straight section 103b2 connected in sequence, a fourth inclined straight section (not numbered) extending obliquely forward and downward, and a fifth inclined straight section (not numbered) extending obliquely forward and downward, wherein the first horizontal straight section 103b2 is located above the rear section of the first inclined straight section 1301 and connected to the joint section, the fourth inclined straight section is located above the front section of the first inclined straight section 1301 and the second inclined straight section 1302 and is parallel to the second inclined straight section 1302, and the fifth inclined straight section is located above the third inclined straight section 1303 and is parallel to the third inclined straight section 1303. In this way, the bottom wall of the lower box body 1032 matches the bottom wall of the freezing liner 130, reducing the interval gap between the lower box body 1032 and the bottom wall of the freezing liner 130, and reducing the overall height of the housing.

[0085] The gap between the lower box body 1032 and the bottom wall of the freezing liner 130 is filled with a sponge strip to seal the gap and prevent air leakage.

[0086] The bottom wall 103b of the lower box body 1032 may be formed with at least one drainage hole 103b3, such as Fig.10 As shown, there are two drainage holes 103b3 to facilitate drainage of condensed water that may be formed.

[0087] The top wall 103a of the upper cover 1033 of the casing may include, from back to front, a sixth inclined straight section (unnumbered) extending obliquely forward and downward, a seventh inclined straight section (unnumbered) extending obliquely forward and downward, and an eighth inclined straight section (unnumbered) extending obliquely forward and downward, which are connected in sequence.

[0088] The sixth inclined straight section may be parallel to the first inclined straight section 1301 of the bottom wall of the freezing liner 130, and the seventh inclined straight section may be parallel to the fourth inclined straight section of the bottom wall 103b of the lower box body 1032. In this way, the overall shape of the housing of the air supply fan 103 is matched with the freezing liner 130, the height of the housing is reduced, and the space where the cooling chamber is located is reduced.

[0089] After the upper cover 1033 is buckled with the lower box body 1032, the first side wall 103d of the upper cover 1033 is located on the inner side of the second side wall of the lower box body 1032, that is to say, the first side wall 103d of the upper cover 1033 and the top wall 103a of the upper cover 1033 and the bottom wall 103b of the lower box body 1032 define an air supply duct in the casing.

[0090] like Fig. 9 As shown, the first side wall 103d of the upper cover 1033 has a volute line, which is configured as a volute air duct, which better guides the airflow to flow toward the air outlet of the casing and reduces noise. The inner surface of the top wall 103a of the upper cover 1033 is formed with a volute groove 103a3, and the volute groove 103a3 cooperates with the first side wall 103d of the upper cover 1033 to better guide the airflow. For example, the inner surface of the seventh inclined straight section of the top wall 103a of the upper cover 1033 is formed with a volute groove 103a3. The volute groove 103a3 is formed with the aforementioned casing air inlet 1033a, and the impeller 1031 is arranged in the area defined by the volute groove 103a3 and the lower box body 1032.

[0091] The rotation axis of the impeller 1031 is perpendicular to the fourth inclined straight section, that is, the angle β and θ between the rotation axis of the impeller 1031 and the vertical line are the same, that is, β can be 20° to 35°, for example, β is 20°, 25°, 33°, 35°.

[0092] The following specifically describes the freezer compartment air duct 141 and the assembly of the freezer compartment air duct 141 and the air supply fan 103:

[0093] The freezer air duct 141 includes a front air duct cover plate 1411 located at the front side and a rear air duct cover plate 1412 located at the rear side, and the front air duct cover plate 1411 and the rear air duct cover plate 1412 can be snap-fitted and assembled. The front air duct cover plate 1411 is detachably connected to the upper cover body 1033, and the rear air duct cover plate 1412 is detachably connected to the lower box body 1032, so that the housing air outlet is connected to the air duct inlet of the freezer air duct 141.

[0094] In the existing refrigerator 10, the air duct and the fan casing are mostly integrated structures, which are inconvenient to transport and cannot be modularized. In this embodiment, the freezer air duct 141 and the air supply fan 103 casing adopt a split design to achieve modularization, facilitate disassembly and transportation, and improve the yield rate.

[0095] like Figure 6 As shown, the air duct rear cover plate 1412 may include a rear vertical plate section 1412e extending vertically at the lower part and a joint section extending forward and downward by bending from the lower end of the rear vertical plate section 1412e, the joint section is located below the air duct front cover plate 1411, and the front end of the joint section and the lower end of the air duct front cover plate 1411 define an air duct air inlet. The air duct rear cover plate 1412 is detachably connected to the lower box body 1032 through the joint section, and the aforementioned matching portion 141f is formed on the joint section.

[0096] In this embodiment, the air duct rear cover plate 1412 is designed to have a joint section that is bent and extended from the lower end of the rear vertical plate section 1412e to the front and downward, so as to facilitate connection with the casing of the air supply fan 103 in the front, so as to promote the air flow in the casing to smoothly enter the freezing chamber air duct 141, thereby reducing noise. In addition, the joint section forms a matching portion 141f that matches the limiting groove 130a1 on the bottom wall of the freezing liner 130, so that the air duct rear cover plate 1412 can actively cooperate with the freezing liner 130 and the casing of the air supply fan 103, and the overall layout is more compact and reasonable.

[0097] like Figure 6 As shown, the joining section of the air duct rear cover plate 1412 includes a transition curved section 1412a extending forward and downward from the rear vertical plate section 1412e, a ninth inclined straight section 1412b extending forward and downward from the transition curved section 1412a, and a second horizontal straight section 1412c extending horizontally forward from the ninth inclined straight section 1412b.

[0098] A first vertical plate 1412d extending vertically downward is formed at the front end of the second horizontal straight section 1412c. The first vertical plate 1412d extends from one lateral side of the second horizontal straight section 1412c to the other side. The front vertical surface of the first vertical plate 1412d is formed with at least one first buckle 141c protruding forward. The rear vertical surface of the first vertical plate 1412d may be formed with the aforementioned matching portion 141f protruding backward.

[0099] A second vertical plate 103b1 extending vertically downward is formed at the rear end of the bottom wall 103b of the lower box body 1032. The second vertical plate 103b1 extends from one lateral side to the other side of the bottom wall 103b of the lower box body 1032. A first notch 103b11 corresponding to and adapted to at least one first buckle 141c is formed at the lower end of the second vertical plate 103b1. The first buckle 141c is snapped into the corresponding first notch 103b11 and hooked with the front facade of the second vertical plate 103b1 to buckle the lower box body 1032 on the rear cover plate 1412 of the air duct.

[0100] The rear end of the bottom wall 103 b of the lower box body 1032 is also the rear end of the first horizontal straight section 103 b 2 of the bottom wall 103 b of the lower box body 1032 .

[0101] There are two first buckles 141c, and the three first buckles 141c are spaced apart in the horizontal direction. Accordingly, there are three first notches 103b11, and the three first notches 103b11 are spaced apart in the horizontal direction.

[0102] When the lower box body 1032 is buckled with the air duct rear cover plate 1412, the front facade of the first vertical plate 1412d is closely fitted with the rear facade of the second vertical plate 103b1, and there is a small spacing gap between them, and a sponge strip can be stuffed into the spacing gap to prevent air leakage.

[0103] like Figure 6 As shown, the air duct front cover plate 1411 includes a vertically extending front vertical plate section 1411a located at the lower part, and the front wall surface of the front vertical plate section 1411a is formed with at least one second buckle 141b protruding forward.

[0104] A third vertical plate 103a1 extending upward is formed at the rear end of the top wall 103a of the upper cover body 1033. The third vertical plate 103a1 extends from one lateral side of the top wall 103a of the upper cover body 1033 to the other side. At least one second notch 103a11 corresponding to and adapted to at least one second buckle 141b is formed at the upper end of the third vertical plate 103a1. The second buckle 141b is inserted into the corresponding second notch 103a11 and hooked with the front facade of the third vertical plate 103a1 to buckle the upper cover body 1033 on the front cover plate 1411 of the air duct.

[0105] The rear end of the top wall 103a of the upper cover body 1033 is also the rear end of the sixth inclined straight segment.

[0106] like Figure 7 As shown, there are two second buckles 141b, which are spaced apart from each other laterally. Accordingly, there are two second notches 103a11, which are spaced apart from each other laterally.

[0107] The lateral dimension of the front vertical plate segment 1411a should be equal to or greater than the lateral dimension of the third vertical plate 103a1. Figure 8 As shown, the lateral dimension of the front vertical plate segment 1411a is substantially the same as the lateral dimension of the third vertical plate 103a1, so that when the upper cover 1033 is buckled with the front cover plate 1411 of the air duct, the front vertical plate segment 1411a can completely cover the third vertical plate 103a1. When the upper cover 1033 is buckled with the front cover plate 1411 of the air duct, the rear elevation of the front vertical plate segment 1411a is nearly in contact with the front elevation of the third vertical plate 103a1, and there is a small gap between the two, and a sponge strip can be stuffed into the gap to prevent air leakage.

[0108] The rear wall of the front vertical plate section 1411 a may be formed with a plurality of reinforcing ribs 141 e protruding rearward to enhance the strength of the front vertical plate section 1411 a .

[0109] The front facade of the third vertical plate 103a1 is formed with a plurality of reinforcing ribs 103a2 distributed at intervals along the transverse direction, and the third vertical plate 103a1 is also formed with a mounting portion 141h protruding from the third vertical plate 103a1. For example, the mounting portion 141h is formed in the transverse middle position of the third vertical plate 103a1, and a first screw hole is formed on the mounting portion 141h. A second screw hole corresponding to the first screw hole is formed in the area corresponding to the front vertical plate section 1411a and the mounting portion 141h, so that the upper cover body 1033 and the air duct front cover plate 1411 can be assembled by means of screws passing through the first screw hole and the second screw hole.

[0110] A sealing portion 141d extending forward is also formed on both lateral sides of the rear cover plate 1412 of the air duct, and each sealing portion 141d extends into the casing of the air supply fan 103, and is used to seal the lateral sides of the intersection of the freezer air duct 141 and the casing of the air supply fan 103, that is, it is used to seal the lateral intersection of the rear cover plate 1412 of the air duct and the lower box body 1032 when they are buckled together, and it is used to seal the lateral intersection of the front cover plate 1411 of the air duct and the upper cover body 1033 when they are buckled together, so as to avoid air leakage.

[0111] like Figure 6 and Figure 8 As shown, the section defined by the rear vertical plate section 1412e and the joint section of the air duct rear cover plate 1412 is recorded as the lower plate section of the air duct rear cover plate 1412, and the two sealing portions 141d are respectively formed on the inner sides of the two lateral ends of the lower plate section.

[0112] As described above, the special structure of the freezing liner 130 and the special structure of the air duct rear cover 1412 can prevent the freezing chamber air duct 141 from falling and causing frost around the top of the freezing chamber air duct 141, thereby ensuring the refrigeration effect during the operation of the refrigerator 10; and the special structure of the casing of the air supply fan 103 and the special structure of the bottom wall of the freezing liner 130 make the spatial layout of the cooling chamber more compact and reduce the space occupied by the cooling chamber, thereby providing a larger storage volume for the freezing chamber 132 above the cooling chamber; in addition, the special structure of the air duct rear cover 1412, the special structure of the air duct front cover 1411 and the special structure of the casing of the air supply fan 103 realize the split design of the freezing chamber air duct 141 and the casing of the air supply fan 103, and ensure the sealing of the assembly of the freezing chamber air duct 141 and the casing of the air supply fan 103.

[0113] In the refrigerator 10 of this embodiment, a press cabin (not shown) is defined at the bottom of the box body 100, and the press cabin is located behind the cooling chamber. As before, the freezer chamber 132 no longer needs to make way for the press cabin, thereby ensuring the depth of the freezer chamber 132, making it convenient to place larger items that are not easy to divide.

[0114] The refrigerator 10 further includes a heat dissipation fan (not shown), which may be an axial flow fan. The compressor, the heat dissipation fan and the condenser (not shown) are arranged in the compressor compartment in a sequentially spaced manner along the transverse direction. The bottom wall of the box body 100 defines a bottom air inlet corresponding to the condenser and a bottom air outlet corresponding to the compressor arranged transversely. The heat dissipation fan is configured to inhale ambient air from the surrounding environment of the bottom air inlet and cause the air to first pass through the condenser, then pass through the compressor, and then flow from the bottom air outlet to the surrounding environment, thereby dissipating heat from the condenser and the compressor. In the vapor compression refrigeration cycle, the surface temperature of the condenser is generally lower than the surface temperature of the compressor. Therefore, in the above process, the external air is first cooled by the condenser and then cooled by the compressor.

[0115] The refrigerator 10 of this embodiment can be embedded and used in an embedded cabinet to reduce the space occupied by the refrigerator 10. In order to improve the overall aesthetics of the refrigerator 10 and reduce the space occupied by the refrigerator 10, the reserved space between the rear wall of the refrigerator 10 and the cabinet is small, resulting in a low heat dissipation efficiency of the front and rear air inlet and outlet method used in the prior art. If heat dissipation is to be ensured, the distance between the rear wall of the refrigerator 10 and the cabinet must be increased, which, however, also brings about the problem of increased space occupied by the refrigerator 10.

[0116] The refrigerator 10 of the present embodiment is provided with a bottom air inlet and a bottom air outlet arranged horizontally on the bottom wall of the box body 100. The heat dissipation airflow circulates at the bottom of the refrigerator 10, making full use of the space between the refrigerator 10 and the supporting surface. There is no need to increase the distance between the rear wall of the refrigerator 10 and the cabinet, thereby reducing the space occupied by the refrigerator 10 and improving the heat dissipation efficiency.

[0117] Support rollers (not shown) may be provided at the four corners of the bottom wall of the box body 100 , and the box body 100 is placed on the support surface via the four support rollers, so that a certain space is formed between the bottom wall of the box body 100 and the support surface.

[0118] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A refrigerator for preventing a freezing chamber air duct from moving downward, comprising: The box body includes a freezing liner located at the bottom, wherein the freezing liner defines a cooling chamber and a freezing chamber located above the cooling chamber; an evaporator disposed in the cooling chamber and configured to cool the airflow entering the cooling chamber to form a cooling airflow; a freezer compartment air duct disposed on the inner side of the rear wall of the freezer liner and configured to convey at least a portion of the cooling airflow into the freezer compartment; an air supply fan, disposed in the cooling chamber and configured to force the cooling air flow into the freezing chamber air duct; A compressor cabin located behind the cooling chamber; The rear section of the bottom wall of the freezing inner container is formed with at least one first limiting boss protruding upward, and each of the first limiting bosses forms a limiting groove; the lower section of the freezing chamber air duct is formed with a matching portion that matches with the limiting groove, and the matching portion matches with the limiting groove to prevent the freezing chamber air duct from moving downward; The bottom wall of the freezing container includes, from back to front, a first inclined straight section extending obliquely forward and downward, a second inclined straight section extending obliquely forward and downward, and a third inclined straight section extending obliquely forward and downward, which are connected in sequence; The at least one first limiting boss is formed at a position of the first inclined straight section adjacent to the rear end.

2. The refrigerator according to claim 1, wherein The areas of the two transverse side walls of the freezing inner container corresponding to the cooling chamber protrude toward the cooling chamber to form a second limiting boss respectively; The refrigerator also includes a cover plate, which constitutes the top wall and the front wall of the cooling chamber, and together with the two second limiting bosses, the sections of the side walls of the two freezing liner located in front of the corresponding second limiting bosses, the bottom wall of the freezing liner and the rear wall of the freezing liner, define the cooling chamber.

3. The refrigerator according to claim 1, wherein The freezing chamber air duct comprises an air duct front cover plate located at the front side and an air duct rear cover plate located at the rear side and defining an air supply air duct with the air duct front cover plate; The rear cover plate of the air duct includes a rear vertical plate section extending vertically at the lower part and a joint section extending forward and downward from the lower end of the rear vertical plate section, the joint section is located below the front cover plate of the air duct, and the front end of the joint section and the lower end of the front cover plate of the air duct define an air inlet of the air duct; The engaging section is formed with the matching portion.

4. The refrigerator according to claim 3, wherein The air supply fan is located behind the evaporator, and includes a casing and an impeller arranged in the casing. The casing includes a lower box body and an upper cover body buckled on the lower box body. The rear end of the upper cover body and the rear end of the lower box body define an air outlet of the casing. The front cover plate of the air duct is detachably connected to the upper cover body, and the rear cover plate of the air duct is detachably connected to the lower box body through the joint section, so that the air outlet of the casing is connected to the air inlet of the air duct.

5. The refrigerator according to claim 4, wherein A third limiting boss protruding upward is formed on both lateral sides of the bottom wall of the freezing tank near the rear end, and the two third limiting bosses and the section of the bottom wall of the freezing tank located behind the evaporator define a space for arranging the air supply fan.

6. The refrigerator according to claim 4, wherein The bottom wall of the freezing container further includes, from the front end of the third inclined straight section, a water receiving section located below the evaporator and a front bending section extending forwardly from the water receiving section, which are connected in sequence.

7. The refrigerator according to claim 6, wherein The bottom wall of the lower box body includes, from back to front, a first horizontal straight section, a fourth inclined straight section extending obliquely forward and downward, and a fifth inclined straight section extending obliquely forward and downward, which are connected in sequence; The first horizontal straight section is located above the rear section of the first inclined straight section and is connected to the joining section; The fourth inclined straight segment is located above the front section of the first inclined straight segment and the second inclined straight segment and is parallel to the second inclined straight segment. The fifth inclined straight segment is located above the third inclined straight segment and is parallel to the third inclined straight segment.

8. The refrigerator according to claim 7, wherein The air supply fan is a centrifugal fan, and the rotating shaft of the impeller is perpendicular to the fourth inclined straight section; The top wall of the upper cover body forms an air inlet for the organic shell.

9. The refrigerator according to claim 6, wherein The included angle between the projection line of the first inclined straight section on the vertical plane parallel to the side wall of the freezing inner container and the horizontal straight line extending forward and backward is 5° to 15°; The included angle between the projection line of the second inclined straight section on the vertical plane parallel to the side wall of the freezing inner container and the horizontal straight line extending forward and backward is 30° to 40°; The included angle between the projection line of the third inclined straight section on the vertical plane parallel to the side wall of the freezing inner container and the horizontal straight line extending forward and backward is 5° to 15°.

10. The refrigerator according to claim 1, wherein the cabinet further comprises: A variable temperature inner container is located above the freezing inner container and defines a variable temperature chamber therein; The temperature-changing chamber air duct is configured to be controllably connected to the freezing chamber air duct so as to transport part of the cooling airflow in the freezing chamber air duct to the temperature-changing chamber.

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