Air duct structure of refrigerator

Abstract

A kind of air duct structure of refrigerator, including freezing liner, freezing chamber is provided in freezing liner, freezing chamber is provided with air duct assembly on, air duct assembly includes cover plate and back cover, cover plate is provided with freezing return air passage that communicates freezing chamber, back cover is fitted with freezing liner inner wall, to form refrigeration return air passage and electrical cavity, evaporator is provided in electrical cavity, heating component is provided in the bottom of evaporator, area is formed between freezing return air passage and refrigeration return air passage, corresponding to the position of area, freezing return air passage and freezing liner are provided with barrier structure, so that freezing return air passage and refrigeration return air passage are not communicated in area, channel is formed between the bottom of cover plate and freezing liner, freezing return air passage and refrigeration return air passage are communicated by channel, heating component is arranged on channel.The refrigerator air duct structure of the utility model solves the problem that the freezing air in freezing chamber and the warm air flowing to the refrigeration air duct appear icing in return air passage.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to an air duct structure for a refrigerator. Background Technology

[0002] like Figures 9-10 As shown, in the current market, the freezer compartment 101 of the air-cooled refrigerator is generally equipped with an air duct component 102. The air duct component 102 is equipped with a freezer return air channel 103, which is used to draw the air in the freezer compartment 101 into the evaporator 104, cool it again, and then deliver it to the freezer compartment 101 to achieve the cooling effect of the freezer compartment 101.

[0003] Regarding the case where the refrigerator return air duct 105 is located on the side of the freezer return air duct 103, since the humid air inside the refrigerator passes through the freezer return air duct 103 and then directly reaches the freezer 101, the humid warm air returning from the refrigerator encounters the cold air in the freezer 101 at the return air duct, which can easily cause icing, resulting in air duct blockage and affecting the refrigerator's cooling effect.

[0004] Meanwhile, some refrigerators on the market use a sealing sponge block in the return air duct for sealing. This structure increases the number of parts and the cost of the product. In addition, it requires manual pasting, which is a more complicated process. Therefore, it needs to be improved.

[0005] Therefore, further improvements are necessary. Utility Model Content

[0006] The purpose of this invention is to provide a refrigerator air duct structure that is simple in structure and manufacturing process, can prevent ice formation in the return air duct, and is highly practical, so as to overcome the shortcomings of the prior art.

[0007] A refrigerator air duct structure designed for this purpose includes a freezer inner liner, a freezer compartment inside the freezer inner liner, and an air duct assembly on the freezer compartment. The air duct assembly comprises a cover plate and a rear cover. The cover plate has a freezer return air duct connecting to the freezer compartment. The rear cover is fitted to the inner wall of the freezer inner liner to form a refrigerator return air duct and an electrical cavity. An evaporator is installed inside the electrical cavity, and a heating element is installed at the bottom of the evaporator. A region is formed between the freezer return air duct and the refrigerator return air duct. A barrier structure is provided between the freezer return air duct and the freezer inner liner at a position corresponding to the region, so that the freezer return air duct and the refrigerator return air duct are not connected within the region. A channel is formed between the bottom of the cover plate and the freezer inner liner, and the freezer return air duct and the refrigerator return air duct are connected through the channel. The heating element is installed on the channel.

[0008] The barrier structure includes a recessed portion on the refrigeration return air duct and a flat surface on the refrigeration inner liner, with the recessed portion and the flat surface fitting together.

[0009] The recessed part is located on the refrigeration return air duct corresponding to the position of the refrigerator return air duct, and the flat part is located on the refrigeration inner liner corresponding to the position of the recessed part.

[0010] The bottom of the cover has a downward extension that extends beyond the back cover, forming a channel between the extension and the freezer liner.

[0011] The refrigeration return air duct is equipped with a main return air duct, which is connected to the refrigeration return air duct. The width of the main return air duct is greater than the width of the recess.

[0012] The rear cover is provided with a raised rib protruding towards the refrigeration return air channel, and the side of the raised rib facing the electrical cavity forms an air-proof position for the evaporator.

[0013] The refrigeration return air duct is inclined vertically on the freezer compartment and extends downward to the bottom of the cover plate, with the refrigeration return air duct located below the rear cover.

[0014] The refrigerated return air duct and the electrical cavity are separated by the rear cover.

[0015] The refrigerated return air duct, the channel, and the frozen return air duct are arranged sequentially, one above the other; the channel is located below the evaporator.

[0016] The heating element is a defrosting heating element.

[0017] The refrigerator air duct structure of this utility model solves the problem of icing in the return air duct of the refrigerator's refrigeration air duct and the freezer air in the freezer compartment by adding a recessed part that fits the inner liner. This solves the problem of icing in the return air duct of the refrigerator's refrigeration air duct and the freezer air in the freezer compartment (i.e., icing up after a long time and blocking the air duct, affecting the refrigerator's cooling effect). At the same time, it eliminates the need for additional sponge sealing blocks, which reduces product costs and optimizes the production process. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of a refrigerator in one embodiment of the present invention.

[0019] Figure 2 This is a perspective view of a refrigerator in one embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the overall structure of the evaporator in one embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the overall structure of the air duct assembly in one embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the overall structure of the air duct assembly from another position in one embodiment of the present invention.

[0023] Figure 6 This is a cross-sectional view of the refrigerator from another position in one embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the overall structure of a refrigerator in one embodiment of the present invention.

[0025] Figure 8 This is a partial structural diagram of a refrigerator in one embodiment of the present invention.

[0026] Figure 9 This is a cross-sectional view of a traditional refrigerator.

[0027] Figure 10 This is a perspective view of a traditional refrigerator. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] See Figures 1-10 The air duct structure of this refrigerator includes a freezer inner liner 1, a freezer compartment 2 inside the freezer inner liner 1, and an air duct assembly 3 at the rear of the freezer compartment 2. The air duct assembly 3 includes a cover plate 4 and a rear cover 5. A freezer return air duct 6 connecting the freezer compartment 2 is provided at the front of the cover plate 4. The rear cover 5 is fitted to the inner wall of the freezer inner liner 1 to form a refrigerator return air duct 7 and an electrical cavity 8. An evaporator 9 is provided in the electrical cavity 8. A heating element 10 is provided at the bottom of the evaporator 9. A region 11 is formed between the freezer return air duct 6 and the refrigerator return air duct 7. A barrier structure is provided between the freezer return air duct 6 and the freezer inner liner 1 at a position corresponding to the region 11 so that the freezer return air duct 6 and the refrigerator return air duct 7 are not connected to each other in the region 11. A channel 12 is formed between the bottom of the cover plate 4 and the freezer inner liner 1. The freezer return air duct 6 and the refrigerator return air duct 7 are connected through the channel 12. The heating element 10 is provided on the channel 12.

[0030] The barrier structure includes a recess 17 on the freezer return air duct 6 and a flat surface 18 on the freezer inner liner 1. The recess 17 and the flat surface 18 fit together, so cold air and warm air cannot meet in area 11, but only in the duct 12 below the evaporator 6. Therefore, the condensed ice will only accumulate on the duct 12. Under the action of the defrosting heating element, the ice will melt into water and be discharged into the refrigerator, solving the problem of ice accumulation blocking the return air duct and affecting the refrigerator's cooling effect. In contrast, the traditional air duct structure does not have a recess on its cover, so the refrigerator return air duct and the freezer return air duct are connected. During the refrigerator's operation, the warm air flowing down the refrigerator return air duct will meet the cold air in the freezer return air duct and the area in the freezer compartment where the return air duct meets the warm air. This causes the moisture in the warm air to condense into ice, which accumulates over a long period of time and blocks the area, affecting the refrigerator's cooling effect. In addition, this solution does not require the use of additional sponge sealing blocks, which reduces product costs and optimizes the production process.

[0031] The recess 17 is provided on the freezer return air channel 6 at the position corresponding to the refrigerator return air channel 7, and the flat surface 18 is provided on the freezer inner liner 1 at the position corresponding to the recess 17.

[0032] The bottom of the cover plate 4 is provided with a downwardly extending extension 13. The extension 13 extends downward beyond the rear cover 5, and a channel 12 is formed between the extension 13 and the freezer inner liner 1. The warm air in the refrigeration return air channel 7 flows through the channel 12 to the freezer return air channel 6 (i.e., the main return air channel 14), and then enters the freezer compartment 2. The cold air in the freezer compartment 2 enters the evaporator 9 through the freezer return air channel 6 (i.e., the main return air channel 14).

[0033] The freezer return air duct 6 is provided with a main return air duct 14. The main return air duct 14 and the refrigerator return air duct 7 are connected by a duct 12. The main return air duct 14 and the recess 17 are distributed on the left and right sides of the front of the cover plate 4. The width of the main return air duct 14 is greater than the width of the recess 17, ensuring that the cold air in the freezer compartment 2 can smoothly enter the evaporator 9 and the warm air in the refrigerator return air duct 7 can smoothly enter the freezer compartment 2.

[0034] The rear cover 5 is provided with a protruding rib 15 that protrudes into the refrigeration return air channel 7. The side of the protruding rib 15 facing the electrical cavity 8 forms an air-proof position 16 for the evaporator 9, thereby giving the electrical cavity 8 enough space to install the evaporator 9.

[0035] The refrigeration return air duct 6 is inclined vertically on the freezer chamber 2, and extends downward to the bottom of the cover plate 4. The refrigeration return air duct 6 is located below the rear cover 5.

[0036] The refrigerated return air duct 7 and the electrical cavity 8 are separated by the rear cover 5 to prevent warm air from the refrigerated return air duct 7 from entering the electrical cavity 8.

[0037] The refrigerated return air duct 7, duct 12 and the frozen return air duct 6 are arranged vertically in sequence.

[0038] The rear cover 5 has a fitting surface 19 on its rear side, which fits and is fitted to the rear wall of the freezer inner liner 1 to form a refrigerated return air channel 7 and an electrical cavity 8.

[0039] The refrigerator has a refrigerator compartment 20 located above the freezer inner liner 1, and the refrigerator compartment 20 is connected to the refrigerator return air duct 7.

[0040] Heating element 10 is a defrosting heating tube.

[0041] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A wind channel structure of a refrigerator, comprising a freezing liner (1), a freezing chamber (2) is arranged in the freezing liner (1), a wind channel assembly (3) is arranged on the freezing chamber (2), characterized in that: The air duct assembly (3) includes a cover plate (4) and a rear cover (5). The cover plate (4) is provided with a refrigeration return air duct (6) that connects to the freezer compartment (2). The rear cover (5) is fitted to the inner wall of the freezer inner liner (1) to form a refrigeration return air duct (7) and an electrical cavity (8). An evaporator (9) is provided in the electrical cavity (8). A heating element (10) is provided at the bottom of the evaporator (9). An area (11) is formed between the refrigeration return air duct (6) and the refrigeration return air duct (7). A barrier structure is provided between the refrigeration return air duct (6) and the freezer inner liner (1) at the position corresponding to the area (11) so that the refrigeration return air duct (6) and the refrigeration return air duct (7) are not connected to each other in the area (11). A channel (12) is formed between the bottom of the cover plate (4) and the freezer inner liner (1). The refrigeration return air duct (6) and the refrigeration return air duct (7) are connected through the channel (12). The heating element (10) is provided on the channel (12).

2. The duct structure of a refrigerator according to claim 1, characterized in that: The barrier structure includes a recess (17) provided on the refrigeration return air channel (6) and a flat surface (18) provided on the refrigeration inner liner (1), with the recess (17) and the flat surface (18) fitting together.

3. The duct structure of a refrigerator according to claim 2, characterized in that: The recess (17) is located on the refrigeration return air channel (6) corresponding to the position of the refrigeration return air channel (7), and the flat surface (18) is located on the refrigeration inner liner (1) corresponding to the position of the recess (17).

4. The duct structure of a refrigerator according to claim 1, characterized in that: The bottom of the cover plate (4) is provided with a downwardly extending extension (13), which extends downward beyond the rear cover (5) and forms a channel (12) between the extension (13) and the freezer inner liner (1).

5. The duct structure of a refrigerator according to claim 2, characterized in that: The refrigerated return air duct (6) is provided with a main return air duct (14), and the main return air duct (14) and the refrigerated return air duct (7) are connected through the duct (12). The width of the main return air duct (14) is greater than the width of the recess (17).

6. The duct structure of a refrigerator according to claim 2, characterized in that: The rear cover (5) is provided with a protruding rib (15) protruding towards the refrigerated return air channel (7). The side of the rib (15) facing the electrical cavity (8) forms an air-proof position (16) for the evaporator (9).

7. The duct structure of a refrigerator according to claim 1, characterized in that: The refrigeration return air duct (6) is inclined up and down on the freezer chamber (2), and the refrigeration return air duct (6) extends downward to the bottom of the cover plate (4). The refrigeration return air duct (6) is located below the rear cover (5).

8. The duct structure of a refrigerator according to claim 1, characterized in that: The refrigerated return air passage (7) and the electrical cavity (8) are separated by the rear cover (5).

9. The duct structure of a refrigerator according to claim 1, characterized in that: The refrigerated return air duct (7), the duct (12) and the frozen return air duct (6) are arranged vertically in sequence; the duct (12) is located below the evaporator (9).

10. The duct structure of a refrigerator according to any one of claims 1 to 9, characterized in that: The heating element (10) is a defrosting heating tube.

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