Refrigeration double-air-duct anti-wind-door freezing air duct and refrigerator thereof

Abstract

The invention discloses a refrigeration double-air-duct anti-wind-door freezing air duct and a refrigerator thereof, and relates to the technical field of refrigerators, the refrigeration double-air-duct anti-wind-door freezing air duct comprises a refrigeration air duct and a refrigeration fan cover, the refrigeration air duct comprises an air duct body, an air inlet is formed in one side of the air duct body, and an air door groove used for installing an electric air door is formed in the air inlet; the outlet of the air door groove is provided with a refrigerating chamber air duct and a variable-temperature chamber air duct, the refrigerating chamber air duct is used for supplying air to other parts of the refrigerating chamber, the variable-temperature chamber air duct is used for supplying air to the uppermost variable-temperature chamber of the refrigerating chamber for refrigeration, and the lower portion of the refrigerating air duct is fixedly connected with a rear fan cover used for wrapping and sealing the air door groove; a partition bottom plate used for sealing the refrigerating chamber air duct is fixedly arranged at the lower end of the refrigerating chamber air duct. The refrigerating chamber air outlet system and the variable-temperature chamber air outlet system are separated, it is avoided that when the variable-temperature chamber is directly communicated with the refrigerating air duct, refrigerating moisture enters the air duct through the variable-temperature chamber air port to cause freezing of the air door, the reliability of the electric air door is guaranteed to the maximum extent, and freezing of the air door is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerators, and in particular to a refrigeration double-air-duct windproof door icing air duct and a refrigerator thereof. Background Art

[0002] Air-cooled refrigerators are currently the mainstream refrigerator products in the market. In order to meet the usage habits of consumers in different countries, the top-freezing and bottom-storing series of air-cooled frost-free refrigerators have become the main growth point in Saudi Arabia, America, Southeast Asia, Africa and other regions in recent years. Moreover, the large-volume top-freezing and bottom-storing series products have a trend of gradually developing in the direction of high-end. The traditional mechanical lever temperature control adjustment method is gradually replaced by electric damper adjustment. The advantage of air-cooled refrigerators over traditional direct cooling refrigerators lies in the defrosting of compartment ice. Air-cooled refrigerators can save users from the trouble of frequent ice shoveling, while maximizing the freshness of food. Therefore, reducing the failure rate of air-cooled refrigerators and ensuring the normal operation of the product are the most direct evaluation of users on a refrigerator.

[0003] Most of the large-volume air-cooled products in the freezing and storage series on the market are still mainly controlled by mechanical air volume adjustment levers. In recent years, as the industry's large-volume products have gradually become high-end, the upper freezing and lower storage series of refrigerated and frozen products with independent temperature control, door display, and electric damper adjustment have become a trend. At the same time, electric damper adjustment also faces a series of product reliability problems. Electric damper icing, frost, abnormal opening and closing, etc. are often accompanied by frequent product reliability problems, resulting in extremely poor user experience and declining product reputation. Due to the unique compartment layout of the upper freezing and lower storage series of air-cooled products (the freezer compartment is on the top and the refrigerator compartment is on the bottom), there is also a variable temperature room on the top of the refrigerator, so the reliability problem of the electric damper is more prominent than that of the upper storage and lower freezing products, and it is difficult to solve; if the electric damper is placed in the freezer, the temperature of the freezer is always below zero, which greatly increases the risk of electric damper icing; if it is placed at the air duct joint from the freezer to the refrigerator or the refrigerator air inlet, because the freezer is on the top, there will be defrosting water flowing down into the electric damper. If the problem of water accumulation in the damper cannot be effectively solved, the damper will also have icing problems when placed in the refrigerator. Therefore, placing the electric damper in the cold storage room has become a more common installation method in the industry. To reduce the failure rate of damper icing, it is necessary not only to consider the structural design, but also to integrate refrigeration and control to complement each other and improve product reliability. Summary of the invention

[0004] The purpose of the present invention is to provide a refrigerated double-duct windproof door ice duct and a refrigerator thereof. A refrigerated double-duct windproof door ice duct and a refrigerator thereof are designed. The refrigerated air hood assembly of this structure separates the refrigerated chamber air outlet system and the variable temperature chamber air outlet system by designing a double air path structure, so as to avoid that when the variable temperature chamber is directly connected to the refrigerated air duct, the refrigerated moisture enters the air duct through the variable temperature chamber air outlet, and the moisture encounters the electric air door plate with a temperature below zero, causing the air door to freeze, thereby ensuring the reliability of the electric air door to the greatest extent and preventing the air door from freezing and freezing, thereby affecting the use.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A refrigerated double-duct anti-wind door ice duct, comprising a refrigerated duct and a refrigerated hood fixedly covered on the upper part of the refrigerated duct, the refrigerated duct comprising a duct body, one side of the duct body is provided with an air inlet, the air inlet is provided with a damper slot for installing an electric damper, two air ducts are provided at the outlet of the damper slot, namely a refrigerated chamber duct and a variable temperature chamber duct, the refrigerated chamber duct is used to supply air to other parts of the refrigerated chamber, the variable temperature chamber duct is used to supply air for cooling the uppermost variable temperature chamber of the refrigerated chamber, a rear hood cover for wrapping and sealing the damper slot is fixedly connected to the lower part of the refrigerated duct, and a baffle bottom plate for sealing the refrigerated chamber duct is fixedly provided at the lower end of the refrigerated duct.

[0007] As a further solution of the present invention: the electric damper is installed obliquely in the damper slot.

[0008] As a further solution of the present invention: a damper sponge is arranged at the air inlet.

[0009] As a further solution of the present invention: the refrigerated air hood includes an air duct cover plate and an air duct cover plate, and the lower end edge of the air duct cover plate is provided with an inner buckle for snapping into the air duct body and an outer buckle for installing the refrigerated air hood, and the outer periphery of the air duct body is provided with a connecting groove matching with the inner buckle.

[0010] As a further solution of the present invention: the air hood cover plate is provided with mounting posts for mounting the refrigeration air hood, and the air duct body is provided with post grooves matching with the mounting posts.

[0011] As a further solution of the present invention: a plurality of labyrinth protrusions are arranged at the lower end of the air duct mask, and a labyrinth slot matching with the labyrinth protrusions is arranged at the upper end of the air duct body.

[0012] As a further solution of the present invention: the refrigeration air duct is provided with a front air duct cover for sealing the temperature-changing room air duct, and the front air duct cover is provided with ventilation holes connected with the temperature-changing room air duct.

[0013] As a further solution of the present invention: the front air duct cover is provided with a wire clamping slot for clamping the electric air door connecting wire.

[0014] As a further solution of the present invention, it also includes a controller and a damper heater, wherein the damper heater is used to heat the electric damper, and the controller is used to control the operation of the electric damper, wherein the control method is as follows: the electric damper is set to be opened regularly for 30 seconds every 30 minutes, and before the electric damper is opened and closed each time, the controller issues a command to drive the damper heater to work and preheat the electric damper for 3 minutes.

[0015] A refrigerator comprises the above-mentioned refrigeration double-air duct windproof door ice duct.

[0016] Beneficial effects of the present invention:

[0017] (1) The electric damper is designed to be placed at a 20° slope on the air duct assembly. From the experimental simulation results, a slope of more than 15° can ensure that water flows smoothly without water hanging.

[0018] (2) EPS flange bosses are designed around the electric damper door frame to prevent cold wind from blowing directly. The EPS air duct step surround design can effectively prevent condensation from penetrating into the EPS air duct and the damper gap while keeping the damper warm, causing ice to accumulate and eventually block the door panel.

[0019] (3) A labyrinth groove structure is designed at the joint between the air duct and the air duct cover to enhance the sealing of the refrigeration air duct assembly, avoid the risk of icing caused by air leakage in the air duct, and enhance product reliability.

[0020] (4) The internal structure of the refrigerated air duct is designed with a dual air duct outlet structure. The air outlet of the refrigerated room and the air outlet of the variable temperature drawer are divided into two branches. The refrigerated room is discharged from the side with a wide range, and the air outlet of the variable temperature drawer is discharged through a separate air duct designed on the front side of the refrigerated air duct to prevent moisture from entering the air door through the outlet of the variable temperature air duct and causing ice to form.

[0021] (5) The "spindle-shaped" boss design inside the air duct divides the left and right inclined surfaces at a 25° angle to prevent the discharged condensate from flowing through and accumulating here, and from freezing and then jumping over the level.

[0022] (6) From the perspective of refrigerator control logic, the opening and closing time of the electric damper is optimized. The damper is set to open for 30 seconds every 30 minutes. Before the damper is opened and closed each time, the control panel sends a command to drive the damper heater to preheat the door panel for 3 minutes to prevent the electric damper from being closed for a long time under low ambient temperature. Due to the uncertainty of water flow direction, water droplets are adsorbed on the door panel of the electric damper and freeze. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall axonometric structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the overall structure of the present invention from a top view;

[0027] Figure 4 The present invention Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the refrigeration air hood of the present invention;

[0029] Figure 6 It is a schematic diagram of the axonometric structure of the refrigeration air hood of the present invention;

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the refrigeration air duct of the present invention;

[0031] Figure 8 It is a schematic diagram of the axonometric structure of the refrigeration air duct of the present invention.

[0032] In the figure: 1. Refrigeration hood; 11. Air duct cover plate; 12. Air duct cover plate; 13. Inner buckle; 14. Outer buckle; 15. Labyrinth protrusion; 16. Mounting post; 2. Refrigeration duct; 21. Duct body; 22. Front duct cover; 23. Wire slot; 24. Connection slot; 25. Labyrinth slot; 26. Air door slot; 27. Refrigeration room air duct; 28. Variable temperature room air duct; 29. ​​Post slot; 3. Electric air door; 4. Rear hood cover; 5. Air door sponge; 6. Partition bottom plate. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] See also Figure 1-Figure 7 As shown, an embodiment of the first aspect of the present invention provides a refrigerated double-duct anti-wind door ice duct, comprising a refrigerated duct 2 and a refrigerated hood 1 fixedly covered on the upper part of the refrigerated duct 2, the refrigerated duct 2 comprising an air duct body 21, one side of the air duct body 21 is provided with an air inlet, the air inlet is provided with a damper slot 26 for installing an electric damper 3, two air ducts are provided at the outlet of the damper slot 26, respectively a refrigerated chamber air duct 27 and a variable temperature chamber air duct 28, the refrigerated chamber air duct 27 is used to supply air to other parts of the refrigerated chamber, the variable temperature chamber air duct 28 is used to supply air for cooling the uppermost variable temperature chamber of the refrigerated chamber, the lower part of the refrigerated duct 2 is fixedly connected with a rear air hood cover 4 for wrapping and sealing the damper slot 26, and the lower end of the refrigerated duct 2 is fixedly provided with a baffle bottom plate 6 for sealing the refrigerated chamber air duct 27.

[0037] Furthermore, EPS flanged bosses are designed around the door frame of the electric damper 3 to prevent direct blowing of cold wind. The EPS air duct step surround design can effectively prevent condensation from penetrating into the EPS air duct and the gap between the electric damper 3 while keeping the electric damper 3 warm, causing ice to form, which in turn causes more and more ice to accumulate and eventually block the door panel.

[0038] In an optional embodiment, the electric damper 3 is installed in an inclined manner in the damper slot 26 .

[0039] It should be noted that the electric damper 3 is designed to be placed at a 20° slope on the air duct assembly. From the experimental simulation results, a slope of more than 15° can ensure that water flows smoothly without water hanging.

[0040] In an optional embodiment, a damper sponge 5 is provided at the air inlet.

[0041] It should be noted that closed-end foamed EPDM sealing sponge is used for sealing to prevent condensation of water vapor from causing cold leakage and ice at the air duct openings due to long-term use of the refrigerator.

[0042] In an optional embodiment, the refrigerated air hood 1 includes an air duct cover plate 11 and an air duct cover plate 12, and the lower end edge of the air duct cover plate 12 is provided with an inner snap 13 for snapping into the air duct body 21 and an outer snap 14 for installing the refrigerated air hood 1, and the outer periphery of the air duct body 21 is provided with a connecting slot 24 that cooperates with the inner snap 13.

[0043] It should be noted that the cooperation between the inner buckle 13 and the connecting slot 24 improves the stability of the connection between the refrigeration air hood 1 and the refrigeration air duct 2 .

[0044] In an optional embodiment, the air hood panel 11 is provided with mounting posts 16 for mounting the refrigeration air hood 1 , and the air duct body 21 is provided with post grooves 29 matching with the mounting posts 16 .

[0045] It should be noted that the arrangement of the mounting posts 16 ensures the stability of the installation of the entire air duct structure.

[0046] In an optional embodiment, a plurality of labyrinth protrusions 15 are disposed at the lower end of the air duct cover plate 11 , and a labyrinth slot 25 matching with the labyrinth protrusions 15 is disposed at the upper end of the air duct body 21 .

[0047] It should be noted that a labyrinth groove structure is designed at the joint between the refrigerated air hood 1 and the refrigerated air duct 2 to enhance the sealing of the refrigerated air duct assembly, avoid the risk of icing caused by cold leakage in the air duct, and enhance product reliability.

[0048] In an optional embodiment, the refrigeration air duct 2 is provided with a front air duct cover 22 for sealing the temperature-changing room air duct 28, and the front air duct cover 22 is provided with a ventilation hole connected to the temperature-changing room air duct 28. The front air duct cover 22 is provided with a wire clamping slot 23 for clamping the connecting wire of the electric damper 3.

[0049] It should be noted that the wire clamping slot 23 is provided to clamp the connection of the wire, thereby ensuring the accuracy of the wiring and the stability of the wire connection.

[0050] In an optional embodiment, it also includes a controller and a damper heater, wherein the damper heater is used to heat the electric damper 3, and the controller is used to control the operation of the electric damper 3, and the control method is: set the electric damper 3 to be regularly opened for 30 seconds every 30 minutes, and before the electric damper 3 is opened and closed each time, the controller sends an instruction to drive the damper heater to work to preheat the electric damper 3 for 3 minutes, so as to avoid the electric damper being in a closed state for a long time under low ambient temperature, and the uncertainty of the water flow direction causes water droplets to be adsorbed on the door panel of the electric damper and freeze.

[0051] A second aspect of the present invention provides a refrigerator, comprising the above-mentioned refrigeration double-duct windproof door ice duct.

[0052] The working principle of the present invention is as follows: first, the source of defrost water is reduced from the source. Considering that the water on the fan blades is relatively dispersed when the centrifugal fan is working, a multi-row row of groove structures is designed in the air cavity of the freezing air duct to reduce the condensation from the freezer; the refrigerated air duct 2 is designed with an embedded structure, and the air duct opening is sealed with a closed-end foamed EPDM material damper sponge 5 to avoid cold leakage and icing at the air duct opening caused by condensation of water vapor during long-term use of the refrigerator; at the same time, for the electric damper 3, a 20° inclined surface is designed in the refrigerated air duct, and the electric damper 3 is obliquely placed in the damper groove 26. At the same time, the electric damper 3 door frame is designed with a surrounding structure at the EPS air duct opening, and the electric damper 3 is placed in the EPS foam to perform heat preservation to a certain extent; at this time, if the condensation remaining in the freezer and flowing into the electric damper 3 cannot flow into the damper groove 26, the condensation will not accumulate, but will flow away quickly along the designed 20° damper inclined surface to prevent the condensation from being retained and frozen. Then, the wind entering the cold storage room will be divided into two branches after passing through the electric damper 3. One branch will be sent into the variable temperature chamber tray through the variable temperature chamber duct 28 designed on the front side of the cold storage air duct, thereby forming a micro-variable temperature chamber, and the other branch will flow into the cold storage room through the cold storage room duct 27. At the same time, the air outlet of the cold storage room adopts a wide air outlet design, which reduces the air flow disturbance in the box caused by the rapid wind speed at the air outlet to a certain extent, thereby causing water vapor to condense and freeze at the air outlet. Furthermore, from the control logic of the refrigerator, the opening and closing time of the electric damper 3 is optimized, and the electric damper 3 is set to open regularly for 30 seconds every 30 minutes. Before each opening and closing of the electric damper 3, the control board sends a command to drive the damper heater to work and preheat the door panel for 3 minutes to avoid the electric damper being in a closed state for a long time under low ambient temperature. Due to the uncertainty of the water flow direction, water droplets are adsorbed on the door panel of the electric damper and freeze. The design of the double air duct structure cleverly avoids the risk that the air outlet of the top variable temperature room of the upper freezing and lower storage air cooling refrigerator is too close to the electric damper 3, and the moisture in the refrigerator directly reaches the electric damper 3. By branching the air path, the air supply path is changed, and the air supply in the variable temperature room is ensured, while also blocking the risk of moisture entering the electric damper 3. The reliability of the upper freezing and lower storage series electric damper 3 products is greatly improved, and the user experience is enhanced.

[0053] The dual air duct structure designed in the present invention is a new type of air duct structure based on the previous multiple principle prototype tests and verifications. Through multiple rounds of repeated tests, the possibility and source of the air door freezing are locked. In terms of water flow and moisture isolation, a freezing drainage trough and a refrigerated dual air duct air outlet system are designed, which not only meets the user's temperature range requirements for the variable temperature tray of the upper freezing and lower storage series of air-cooled products, but also isolates the refrigerated moisture from entering the air cavity.

[0054] At the same time, the 20° electric damper is designed to be placed on an inclined surface to increase the condensate discharge speed, and regular opening and closing and preheating procedures are added to the control rules. Corresponding solutions and measures are designed based on various foreseeable incidental situations. The failure rate of the electric damper is reduced to the greatest extent, and the user experience is improved.

[0055] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A refrigerated double-duct windproof door ice duct, characterized in that: The invention comprises a refrigeration air duct (2) and a refrigeration air hood (1) fixedly covering the upper part of the refrigeration air duct (2), wherein the refrigeration air duct (2) comprises an air duct body (21), one side of the air duct body (21) is provided with an air inlet, a damper slot (26) for installing an electric damper (3) is provided in the air inlet, two air ducts are provided at the outlet of the damper slot (26), namely, a refrigeration chamber air duct (27) and a variable temperature chamber air duct (28), the refrigeration chamber air duct (27) is used to supply air to other parts of the refrigeration chamber, and the variable temperature chamber air duct (28) is used to supply air to the variable temperature chamber at the top of the refrigeration chamber for cooling, the lower part of the refrigeration air duct (2) is fixedly connected with a rear air hood cover (4) for wrapping and sealing the damper slot (26), and the lower end of the refrigeration air duct (2) is fixedly provided with a baffle bottom plate (6) for sealing the refrigeration chamber air duct (27).

2. The refrigerated double-air duct windproof door icing air duct according to claim 1, characterized in that: The electric damper (3) is installed in an inclined manner in the damper slot (26).

3. The refrigerated double-air duct windproof door ice duct according to claim 1, characterized in that: A damper sponge (5) is arranged at the air inlet.

4. The refrigerated double-air duct windproof door icing air duct according to claim 1, characterized in that: The refrigeration hood (1) comprises an air duct cover plate (11) and an air duct cover plate (12); an inner snap fastener (13) for snapping onto an air duct body (21) and an outer snap fastener (14) for installing the refrigeration hood (1) are arranged at the lower edge of the air duct cover plate (12); and a connecting slot (24) matching the inner snap fastener (13) is arranged on the outer periphery of the air duct body (21).

5. The refrigerated double-air duct windproof door ice duct according to claim 1, characterized in that: The air hood plate (11) is provided with a mounting post (16) for mounting the refrigeration air hood (1), and the air duct body (21) is provided with a post groove (29) matching with the mounting post (16).

6. The refrigerated double-air duct windproof door ice duct according to claim 1, characterized in that: The lower end of the air shroud plate (11) is provided with a plurality of labyrinth protrusions (15), and the upper end of the air duct body (21) is provided with a labyrinth slot (25) matched with the labyrinth protrusions (15).

7. The refrigerated double-air duct windproof door ice duct according to claim 1, characterized in that: The refrigeration air duct (2) is provided with a front air duct cover (22) for sealing the temperature-changing room air duct (28), and the front air duct cover (22) is provided with a ventilation hole connected to the temperature-changing room air duct (28).

8. The refrigerated double-air duct windproof door ice duct according to claim 1, characterized in that: The front air duct cover (22) is provided with a wire clamping slot (23) for clamping the connecting wire of the electric air door (3).

9. A refrigerated double-air duct windproof door icing air duct according to any one of claims 1 to 8, characterized in that: It also includes a controller and a damper heater, wherein the damper heater is used to heat the electric damper (3), and the controller is used to control the operation of the electric damper (3), wherein the control method is as follows: the electric damper (3) is set to be opened regularly for 30 seconds every 30 minutes, and before the electric damper (3) is opened and closed each time, the controller sends a command to drive the damper heater to operate to preheat the electric damper (3) for 3 minutes.

10. A refrigerator, characterized in that: It comprises the refrigerated double-duct windproof door ice duct as described in any one of claims 1-9.

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