Door assembly for household appliance and household appliance

Abstract

The present disclosure relates to a door assembly for a household appliance, and a household appliance. The door assembly comprises: a display screen; a circuit board, which is in signal connection with the display screen and is arranged on the inner side of the display screen; a plate-shaped component, which is stacked with the display screen and located on the side of the circuit board away from the display screen; an exhaust channel, which extends from the circuit board to the upper end of the plate-shaped component to discharge air that has cooled the circuit board; an upper end cover, which covers the upper end of the exhaust channel and is provided with exhaust holes in communication with the exhaust channel; a first trough body, which is arranged below the upper end cover, wherein the first trough body comprises a first trough bottom, two first trough side frames respectively arranged at two ends of the first trough bottom in the direction of the thickness of the door assembly, and a first opening opposite the first trough bottom, the first opening facing toward the upper end cover, and one first trough side frame of the first trough body being spaced apart from the upper end cover to form an exhaust portion connected to the exhaust channel; and a dustproof component, which is arranged on the exhaust portion and is adapted for flow-through of air that has exchanged heat with the circuit board.

Description

Door components for home appliances and home appliances

[0001] This disclosure is based on and claims priority to CN application number CN 202411924720.7, filed on December 25, 2024, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0002] This disclosure relates to the field of household appliance technology, and more specifically, to a door assembly for a household appliance and the household appliance itself. Background Technology

[0003] With the development of Internet of Things (IoT) technology, smart home devices are becoming increasingly common. In the refrigerator sector, consumers are no longer satisfied with just the basic freezing and refrigeration functions; they also want more intelligent, personalized, and integrated services, such as viewing online recipes, managing healthy eating habits, managing smart shopping lists, and providing home entertainment. This has made refrigerators equipped with displays a popular choice in the market.

[0004] Currently, advancements in high-resolution displays and touch technology have led to a trend in refrigerator products integrating larger, smarter screens and high-quality displays. However, the increasing integration and heat dissipation of display controller PCBs mean that if the heat generated during operation cannot be dissipated in time, it can cause PCB overheating, resulting in system lag, reduced display quality, shortened component lifespan, and other problems, severely impacting the user experience. Summary of the Invention

[0005] This disclosure aims to provide a door assembly for a household appliance and the household appliance itself to improve the problem of system lag caused by overheating in the display system of the prior art.

[0006] According to one aspect of the present disclosure, a door assembly for a household appliance is provided, the door assembly comprising:

[0007] Display screen;

[0008] The circuit board is connected to the display screen signal and is located inside the display screen;

[0009] A plate-shaped component, stacked with the display screen and located on the side of the circuit board furthest from the display screen;

[0010] The exhaust channel extends from the circuit board toward the top of the plate-shaped component to exhaust the air that has cooled the circuit board.

[0011] The upper end cover is located at the upper end of the exhaust channel and has an exhaust port communicating with the exhaust channel; and

[0012] The first groove is located below the upper cover. The first groove includes a first groove bottom, two first groove side frames located at both ends of the first groove bottom along the thickness direction of the door assembly, and a first opening opposite to the first groove bottom. The first opening faces the upper cover. One of the first groove side frames of the first groove is spaced apart from the upper cover to form an exhaust section connected to the exhaust channel.

[0013] A dustproof component is installed on the exhaust section and is configured to allow air to circulate after heat exchange on the circuit board.

[0014] In some embodiments, the door assembly further includes a second groove disposed below the upper cover. The second groove is disposed at the end of the first groove along the thickness direction of the door assembly away from the dustproof component. The second groove includes a second groove bottom, two second groove side frames respectively disposed at both ends of the second groove bottom along the thickness direction of the door assembly, and a second opening opposite to the second groove bottom. The second opening faces the upper cover. The second groove side frame on the side of the second groove closer to the first groove is spaced apart from the upper cover to form a gas passage connecting the exhaust portion and the exhaust port on the upper cover. The opening of the second groove is located directly below the exhaust hole.

[0015] In some embodiments, the bottom of the second groove is higher than the bottom of the first groove, and the second groove edge of the second groove near the first groove is lower than the second groove edge away from the first groove and is spaced apart from the upper end cover.

[0016] In some embodiments, the dustproof component includes a grating plate, the upper end of which abuts against the upper end cover, and the lower end of which abuts against the first groove edge of the first groove body.

[0017] In some embodiments, the door component further includes:

[0018] A fan is positioned between the display screen and the plate-like component and is configured to provide cooling air to the circuit board.

[0019] A temperature sensor is configured to detect the temperature of the circuit board.

[0020] The controller is connected to the temperature sensor and the fan respectively to turn on the fan when the temperature of the circuit board is higher than the set temperature.

[0021] In some embodiments, the flow area of ​​the exhaust channel gradually increases in the direction away from the circuit board.

[0022] In some embodiments, an air intake passage extending from the lower end of the plate-shaped member toward the circuit board is also included.

[0023] In some embodiments, the flow area of ​​the air intake channel gradually decreases along the direction closer to the circuit board.

[0024] In some embodiments, a first groove for forming an exhaust channel is provided on the plate-shaped component. The first groove extends from the circuit board toward the upper end cap and is formed by bending the plate-shaped component.

[0025] In some embodiments, the plate-shaped component further includes a second groove provided for mounting a circuit board and connected to the first groove, and a third groove connected to the second groove and used to form an air intake channel for introducing air to cool the circuit board, the second groove and the third groove being formed by bending the plate-shaped component.

[0026] According to another aspect of this disclosure, a household appliance is also provided, which includes the aforementioned door assembly.

[0027] In some embodiments, the household appliance includes a refrigerator.

[0028] By applying the technical solution disclosed herein, the door assembly is provided with an exhaust channel. The air cooled by the circuit board decreases in density due to the increase in temperature. The hot air flows upward and is discharged through the exhaust hole, while the cooled air flows downward and continues to cool the circuit board. This helps to reduce the temperature of the circuit board and the electronic devices mounted on it, and helps to improve the serious problems that seriously affect the user experience, such as system lag, reduced display effect, and shortened component life caused by excessively high circuit board temperature.

[0029] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 shows a schematic diagram of the structure of a household appliance according to some embodiments of the present disclosure;

[0032] Figure 2 shows an exploded view of a door assembly of a household appliance according to some embodiments of the present disclosure;

[0033] Figure 3 shows a schematic diagram of the internal structure of a door assembly of a household appliance according to some embodiments of the present disclosure;

[0034] Figure 4 shows a cross-sectional structural schematic diagram of a door assembly of a household appliance according to some embodiments of the present disclosure;

[0035] Figure 5 shows a partial enlarged view of Figure 4;

[0036] Figure 6 shows a schematic diagram of the structure of the first and second grooves of a door assembly of a household appliance according to some embodiments of the present disclosure;

[0037] Figure 7 shows a schematic diagram of the exhaust airflow path layout of a door assembly of a household appliance according to some embodiments of the present disclosure;

[0038] Figure 8 shows a schematic diagram of the circuit board structure of a door assembly of a household appliance according to some embodiments of the present disclosure;

[0039] Figure 9 shows a control system block diagram of a door assembly of a household appliance according to some embodiments of the present disclosure;

[0040] Figure 10 shows a control flowchart of a door assembly of a household appliance according to some embodiments of the present disclosure.

[0041] In the diagram: 1. Door lining; 2. Door frame; 3. Vacuum insulation panel; 4. Foam board; 5. Plate-shaped component; 6. Bracket; 7. Transparent panel; 8. Display screen; 9. Circuit board; 10. Fan; 11. Top cover; 12. Air intake channel; 13. Exhaust channel; 14. Dustproof cover; 15. Airflow path; 16. First slot; 17. Second slot; 18. Exhaust vent; 19. Dustproof component; 20. Temperature sensor; 21. Controller; 100. Door assembly; 200. Cabinet. Detailed Implementation

[0042] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and foregoing description of the drawings of this disclosure are intended to cover non-exclusive inclusion.

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] In the description of this disclosure, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0046] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this disclosure. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0047] Unless otherwise specified, the terms "comprising" and "including" as used in this disclosure can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0048] Unless otherwise specified, the term "or" is inclusive in this disclosure. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true or exists and B is false or does not exist; A is false or does not exist and B is true or exists; or both A and B are true or exist.

[0049] Figure 1 shows a schematic diagram of the structure of the household appliance of this embodiment. Referring to Figure 1, the household appliance of this embodiment includes a housing 200 with an open opening and a door assembly 100 disposed on the open opening of the housing 200. In some embodiments, the household appliance includes a refrigerator.

[0050] As shown in Figures 2 to 7, the door assembly 100 of the household appliance in this embodiment includes a display screen 8, a circuit board 9, a plate-shaped component 5, an exhaust channel 13, an upper cover 11, a first groove 16, and a dustproof component 19.

[0051] Circuit board 9 is connected to display screen 8 via signal and is located inside display screen 8. Plate-shaped component 5 is stacked with display screen 8 and located on the side of circuit board 9 away from display screen 8. Exhaust channel 13 extends from circuit board 9 toward the upper end of plate-shaped component 5 to exhaust air cooled by the circuit board 9.

[0052] The upper cover 11 is installed on the upper end of the exhaust channel 13 and has an exhaust hole 18 communicating with the exhaust channel 13. A first groove 16 is disposed below the upper cover 11. The first groove 16 includes a first groove bottom 16a, two first groove side frames 16b respectively disposed at both ends of the first groove bottom 16a along the thickness direction of the door assembly 100, and a first opening opposite to the first groove bottom 16a, with the first opening facing the upper cover 11. One of the first groove side frames 16b of the first groove 16 is spaced apart from the upper cover 11 to form an exhaust section connected to the exhaust channel 13. A dustproof component 19 is disposed on the exhaust section and configured to allow air that has undergone heat exchange with the circuit board 9 to circulate.

[0053] In this embodiment, the door assembly 100 is provided with an exhaust channel 13. The air cooled by the circuit board 9 has a lower density due to the increase in temperature. The hot air flows upward and is discharged through the exhaust hole 18, while the cooled air flows downward and continues to cool the circuit board 9. This helps to reduce the temperature of the circuit board 9 and the electronic devices installed on it, and helps to improve the serious problems that seriously affect the user experience, such as system lag, reduced display effect, and shortened component life caused by the excessive temperature of the circuit board 9.

[0054] Referring to Figures 4 and 5, the hot air after the circuit board 9 is cooled out through the exhaust port 18 and then meets the cooler air outside the door assembly 100. Especially when the indoor temperature is low, water in the air may condense into condensate. The first groove 16 below the upper cover 11 can be used to collect the condensate, which helps to prevent condensate or other water from entering the door assembly 100 through the exhaust channel 13 and affecting electrical components such as the circuit board 9.

[0055] Furthermore, the exhaust section of the first trough 16 is provided with a dustproof component 19, which helps to prevent dust entering the door assembly 100 through the exhaust hole 18 from moving towards electrical components such as the circuit board 9 and thus affecting the heat dissipation of the electrical components, and helps to ensure the normal and reliable operation of the electrical components.

[0056] Furthermore, the air cooled by the circuit board 9 passes through the first tank 16 and is then discharged through the exhaust port 18. The hot air flowing through the first tank 16 is conducive to the evaporation of moisture in the first tank 16, thereby accumulating unexpected water again, and also helps to ensure a dry environment inside the door assembly 100.

[0057] Furthermore, the vent 18 is located on the upper cover 11, which is not easily observed. The use of a concealed vent helps to ensure the harmonious, simple and beautiful appearance of the household appliance.

[0058] The door assembly also includes a second groove 17 located below the upper cover 11. The second groove 17 is located at the end of the first groove 16 away from the dustproof component 19 along the thickness direction of the door assembly 100. The second groove 17 includes a second groove bottom 17a, two second groove side frames 17b respectively located at both ends of the second groove bottom 17a along the thickness direction of the door assembly 100, and a second opening opposite to the second groove bottom 17a. The second opening faces the upper cover 11. The second groove side frame 17b on the side of the second groove 17 closest to the first groove 16 is spaced apart from the upper cover 11 to form a gas passage connecting the exhaust part and the exhaust port on the upper cover 11. The opening of the second groove 17 is located directly below the exhaust hole 18.

[0059] Dust or water outside the door assembly 100 first falls into the second tank 17. When the second tank 17 is full of water or dust, it can overflow into the first tank 16 to prevent a large amount of dust and water generated by extreme working conditions. This helps to further ensure the safe operation of electrical components such as the circuit board 9 and prevent accidental damage.

[0060] The second groove bottom 17a is higher than the first groove bottom 16a. The second groove edge 17a of the second groove body 17, which is closer to the first groove body 16, is lower than the second groove edge 17a away from the first groove body 16 and higher than the first groove edge 16a of the first groove body 16, which is away from the second groove body 17.

[0061] Referring to Figures 5 and 6, the exhaust port 18 is located directly above the second groove 17. On the flow path from the exhaust channel 13 to the exhaust port 18, the first groove edge 16a of the first groove 16, which is away from the second groove 17, and the second groove edge 17a of the second groove 17, which is close to the first groove 16, gradually rise. This facilitates the smooth exhaust of air, thereby ensuring the cooling effect and helping to improve the serious user experience problems caused by the excessive temperature of the circuit board 9, such as system lag, reduced display effect, and shortened component life.

[0062] Referring to Figures 4 and 5, the upper cover 11 is provided with an opening located above the first groove 16 and the second groove 17. The upper cover of the opening is provided with a dust cover plate 14, wherein the exhaust hole 18 is provided on the dust cover plate 14.

[0063] In some embodiments, the dustproof component 19 includes a grille, the upper end of which abuts against the upper end cover 11, and the lower end of which abuts against the first groove edge of the first groove 16. The grille can effectively prevent dust from entering the exhaust channel 13 and adhering to the surface of the electrical components, which helps to ensure the heat dissipation effect of the electrical components and prevents the electrical components from affecting normal operation due to poor heat dissipation.

[0064] The door assembly also includes a fan 10, a temperature sensor 20, and a controller 21. The fan 10 is located between the display screen 8 and the plate-like component 5 and is configured to provide cooling air to the circuit board 9. The temperature sensor 20 is configured to detect the temperature of the circuit board 9. The controller 21 is signal-connected to both the temperature sensor 20 and the fan 10 to turn on the fan 10 when the temperature of the circuit board 9 is higher than a set temperature and to turn off the fan 10 when the temperature of the circuit board 9 is lower than the set temperature.

[0065] The use of fan 10 to provide cooling air for electrical components such as circuit board 9 helps to improve cooling efficiency and ensure the temperature of electrical components. Furthermore, fan 10 only starts to run when the temperature is above the set temperature and shuts down when the temperature is below the set temperature. The intelligent control of fan start and stop effectively reduces the noise generated during fan operation and improves the user experience.

[0066] In some embodiments, the flow area of ​​the exhaust channel 13 gradually increases in the direction away from the circuit board 9, which facilitates the smooth discharge of air after the circuit board 9 has been cooled, thereby ensuring the cooling effect on the circuit board 9 and helping to improve problems such as system lag, reduced display effect, and shortened component life caused by excessive temperature of the circuit board 9, which seriously affect the user experience. Furthermore, the gradually increasing flow area of ​​the exhaust channel 13 helps to improve the smoothness of airflow, avoid excessive noise, and improve the user experience.

[0067] The door assembly also includes an air intake channel 12 extending from the lower end of the plate-shaped component 5 toward the circuit board 9. The air intake channel 12 introduces air to cool the circuit board 9, thereby ensuring that sufficient air is supplied to the circuit board 9. Furthermore, the inlet end of the air intake channel 12 is located at the lower end of the door assembly, which is not easily observed. The concealed design of the air intake helps to ensure the harmonious, simple, and aesthetically pleasing appearance of the home appliance.

[0068] In some embodiments, the flow area of ​​the air intake channel 12 gradually decreases along the direction close to the circuit board 9, and the inlet end of the air intake channel 12 is larger than the outlet end facing the circuit board 9. The inlet end can introduce sufficient air and concentrate it on the circuit board 9, which is beneficial to ensuring the cooling effect on the circuit board 9. Furthermore, the gradually decreasing flow area of ​​the air intake channel 12 is beneficial to improving the smoothness of airflow, avoiding excessive noise, and improving the user experience.

[0069] In some embodiments, the plate-shaped component 5 is provided with a first groove for forming an exhaust channel 13. The first groove extends from the circuit board 9 toward the upper end cover and is formed by bending the plate-shaped component. The first groove for forming the exhaust channel 13 is formed by pressing a plate, which has the advantages of simple structure, low cost, and high production efficiency. Furthermore, the bending structure of the plate-shaped component 5 helps to improve the torsional strength of the plate-shaped component, thereby improving the robustness of the door assembly.

[0070] In some embodiments, the plate-shaped component 5 further includes a second groove for mounting the circuit board 9 and connected to the first groove, and a third groove connected to the second groove and for forming an air intake channel 12 for introducing air to cool the circuit board 9, wherein the second groove and the third groove are formed by bending the plate-shaped component 5.

[0071] The first, second, and third grooves are interconnected, forming an air conditioning flow channel from bottom to top. This facilitates smooth airflow for heat dissipation and cooling of the circuit board 9, ensuring the normal operation of the circuit board 9 and other electrical components. Furthermore, the first, second, and third grooves are formed by pressing sheet metal, offering advantages such as simple structure, low cost, and high production efficiency. The bent structure of the sheet-like component 5 enhances its torsional resistance, thereby improving the robustness of the door assembly.

[0072] Referring to FIG2, the door assembly 100 of this embodiment also includes a bracket 6 disposed between the plate-shaped component 5 and the display screen 8 for supporting the display screen 8.

[0073] Referring to Figure 2, the door assembly 100 of this embodiment also includes a door frame 2, and a plate-shaped member 5 is embedded in the door frame 2. The side of the plate-shaped member 5 away from the display screen 8 has protrusions corresponding to the first, second, and third recesses. A foam board 4 is provided on the side of the plate-shaped member 5 away from the display screen 8, and a recessed portion adapted to the aforementioned protrusions is provided on the side of the foam board 4 facing the plate-shaped member 5. The foam board 4 is provided on the side of the plate-shaped member 5 away from the display screen 8.

[0074] The door assembly 100 also includes a vacuum insulation panel 3 (VIP panel) disposed on the side of the foam board 4 away from the plate-shaped member 5, and a door liner 1 disposed on the side of the vacuum insulation panel 3 away from the foam board 4. The door liner 1, the vacuum insulation panel 3, and the foam board 4 are all embedded within the door frame 2. The door assembly 100 also includes a transparent panel 7 covering the outside of the display screen 8.

[0075] The refrigerator door assembly 100 of this embodiment includes a door liner 1; a door frame 2; a vacuum insulation board 3; a foam board 4; a plate-shaped component 5; a display screen bracket 6; a transparent panel 7; a display screen 8; a circuit board 9; a brushless cooling fan 10; and an upper cover 11.

[0076] Figure 7 shows the structural layout of the door assembly 100, which consists of a display screen 8, a door chamber, a plate-shaped component 5, a first dust collection chamber (first groove 16), and a second dust collection chamber (second groove 17). Figure 2 shows an exploded view of the door assembly 100. The door liner 1, door frame 2, and transparent panel 7 constitute the external structure of the door. The internal structure of the door is as follows: the vacuum insulation board 3 and foam board 4 provide heat insulation. The vacuum insulation board 3 is embedded in the foam board 4. The vacuum insulation board 3 is a double-layer vacuum glass structure, and its thermal conductivity is much lower than that of the foam board 4, which can effectively reduce the thickness of the foam board 4 and increase the refrigerator's volume ratio. The foam board 4 and the plate-shaped component 5 are bonded together using a foaming process. The display screen 8 is fixed on the display screen bracket 6, and the transparent panel 7 is bonded to the bracket using pressure-sensitive adhesive. The heat dissipation duct system is shown in Figure 4. The circuit board 9 is installed on the display screen bracket 6 and embedded in the plate-shaped component 5. The heat dissipation duct is located between the display screen bracket 6 and the plate-shaped component 5. As shown in Figure 3, the heat dissipation duct includes an intake channel 12 and an exhaust channel 13. As shown in Figure 5, the active heat dissipation temperature control system has a temperature sensor 20 mounted on the circuit board 9. The temperature sensor 20 acquires the controller temperature, and the controller controls the start, stop and speed of the brushless DC fan.

[0077] In this embodiment, the heat dissipation air duct is arranged vertically rather than horizontally. The air inlet (the inlet end of the air inlet channel 12) and the air outlet (the outlet end of the exhaust channel 13) are located at the lower and upper ends of the refrigerator door, respectively. The advantages are: the vertical arrangement of the air inlet and outlet improves the overall harmony of the refrigerator's appearance, making the refrigerator look simpler and more beautiful, while reducing the user's perception of the heat dissipation air duct during the user's experience; the hot air discharged from the circuit board inside the door is less dense and rises naturally, making it easier to be discharged through the exhaust hole at the upper end of the door.

[0078] The door frame is equipped with an exhaust vent 18 that connects to the heat dissipation duct. When the fan 10 is not working, dust in the air or water accumulated on the top of the refrigerator will enter the inner cavity of the door assembly 100 through the exhaust vent 18 under the action of gravity. If no isolation structure is provided (where the dustproof component 19 is used to prevent dust from entering the inner cavity of the door assembly 100, and the first groove 16 and the second groove 17 are used to prevent water from entering the inner cavity of the door assembly 100), dust will accumulate on the circuit board 9, and water will enter the inner cavity of the door assembly 100 through the hole, causing short circuits in electronic components and seriously affecting the operation of the large screen display. As shown in Figures 5 and 6, the first and second dust collection chambers designed on the inner side of the upper cover 11 are the isolation structures designed in this embodiment. The second dust collection chamber is connected to the exhaust port, and a plate-shaped component 5 is provided between the second dust collection chamber and the first dust collection chamber. When the second dust collection chamber is full of dust or water, it will flow into the first dust collection chamber to prevent a large amount of dust and water generated by extreme working conditions. Furthermore, when the cooling fan 10 inside the door assembly 100 is working, the hot air discharged through the cooling duct is conducive to the evaporation of water in the dust collection chamber and keeps the dust collection chamber dry.

[0079] The flowchart of the active cooling system is shown in Figures 9 and 10. When the refrigerator is running, the temperature sensor 20 monitors the temperature of the controller 21. The controller 21 determines whether the temperature is higher than the set temperature. When the monitored temperature is higher than the set temperature, the fan 10 starts and the temperature sensor 20 continues to monitor the controller temperature. When the monitored temperature is lower than the set temperature, the fan turns off and the temperature sensor 20 continues to monitor the controller temperature.

[0080] The specific workflow of the active cooling system for the door chamber is as follows:

[0081] When the refrigerator is running, the large display screen operates. The circuit board 9, which integrates various heat-generating electronic components, accumulates a large amount of heat over time, causing the temperature of the door cavity (i.e., the cavity between the plate-shaped component 5 and the display screen 8) to rise, thus raising the controller temperature. The temperature sensor 20 acquires the controller temperature T1 at frequency f. When the monitored temperature exceeds the set temperature Tn, the active cooling temperature control system is activated, and the brushless cooling fan runs at speed n, carrying away the accumulated heat in the cavity. The air flows through the cooling ducts as shown in Figures 4 and 5. With the brushless cooling fan 10 running, the cavity is divided into an intake channel 12 and an exhaust channel 13, with negative pressure during intake. Air enters the intake channel 12 through exhaust holes designed at the bottom of the door frame under atmospheric pressure. The intake channel outlet connects to the brushless cooling fan inlet, and the brushless cooling fan outlet connects to the exhaust channel 13 inlet. Air enters the exhaust channel 13 via the brushless cooling fan, and the heat accumulated in the exhaust channel 13 passes sequentially through the first dust chamber, the second dust chamber, and the upper cover 11, being carried away from the door.

[0082] The following are specific examples:

[0083] When the refrigerator is running, the large display screen operates for 30 minutes. The temperature sensor monitors the controller temperature at 85℃. The controller determines that the door chamber temperature is 5℃ higher than the preset temperature (80℃) and starts the brushless DC fan at 500 rpm. When the temperature sensor monitors the controller temperature at 75℃, the fan is turned off.

[0084] According to another aspect of this disclosure, a household appliance is also provided, which includes the door assembly described above. In some embodiments, the household appliance includes a refrigerator.

[0085] The technical effects of this embodiment are as follows:

[0086] 1. By adopting an active fan cooling strategy and a heat dissipation airflow structure, the method of intelligent temperature control of the display is achieved, which is highly efficient and energy-saving, and effectively improves the product's service life.

[0087] 2. By adopting intelligent control of fan start and stop, the noise generated during fan operation is effectively reduced, improving the user experience;

[0088] 3. The concealed arrangement of the air inlet and outlet at the top and bottom makes the refrigerator's appearance more harmonious, simple, and beautiful;

[0089] 4. The first dust collection chamber and the second dust collection chamber are integrated at the air outlet of the heat dissipation duct. The three are designed as a single unit, which integrates waterproof, dustproof and air outlet functions, and effectively uses the blown hot air to clean the dust and water in the dust collection chamber.

[0090] The above are merely exemplary embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A door assembly for a household appliance, comprising: Display screen (8); Circuit board (9) is connected to the display screen (8) via signal and is disposed inside the display screen (8); A plate-shaped component (5) is stacked with the display screen (8) and located on the side of the circuit board (9) away from the display screen (8); An exhaust channel (13) extends from the circuit board (9) toward the upper end of the plate-shaped component (5) to exhaust the air cooled for the circuit board (9); An upper end cap (11) is provided on the upper end of the exhaust channel (13) and has an exhaust hole (18) communicating with the exhaust channel (13); and A first groove (16) is disposed below the upper cover (11). The first groove (16) includes a first groove bottom (16a), two first groove side frames (16b) respectively disposed at both ends of the first groove bottom (16a) along the thickness direction of the door assembly (100), and a first opening opposite to the first groove bottom (16a). The first opening faces the upper cover (11). One of the first groove side frames (16b) of the first groove (16) is spaced apart from the upper cover (11) to form an exhaust section connected to the exhaust channel (13). A dustproof component (19) is provided on the exhaust section and is configured to allow air to circulate after heat exchange with the circuit board (9).

2. The door assembly according to claim 1 further includes a second groove (17) disposed below the upper cover (11), the second groove (17) being disposed at one end of the first groove (16) away from the dustproof component (19) along the thickness direction of the door assembly (100), the second groove (17) including a second groove bottom (17a), two second groove side frames (17b) respectively disposed at both ends of the second groove bottom (17a) along the thickness direction of the door assembly (100) and a second opening opposite to the second groove bottom (17a), the second opening facing the upper cover (11), the second groove side frame (17b) of the second groove (17) on the side near the first groove (16) being spaced apart from the upper cover (11) to form a gas passage connecting the exhaust portion and the exhaust hole (18) on the upper cover (11), the opening of the second groove (17) being located directly below the exhaust hole (18).

3. The door assembly according to claim 1 or 2, wherein the second groove bottom (17a) is higher than the first groove bottom (16a), and the second groove edge (17a) of the second groove body (17) near the first groove body (16) is lower than the second groove edge (17a) away from the first groove body (16) and is spaced apart from the upper end cover (11).

4. The door assembly according to any one of claims 1 to 3, wherein the dustproof component (19) includes a grille, the upper end of the grille abutting against the upper end cover (11), and the lower end of the grille abutting against the first groove edge of the first groove (16).

5. The door assembly according to any one of claims 1 to 4, further comprising: A fan (10) is disposed between the display screen (8) and the plate-shaped component (5) and configured to provide cooling air to the circuit board (9); A temperature sensor (20) is configured to detect the temperature of the circuit board (9); The controller (21) is signal connected to the temperature sensor (20) and the fan (10) respectively, so as to turn on the fan (10) when the temperature of the circuit board (9) is higher than the set temperature.

6. The door assembly according to any one of claims 1 to 5, wherein the flow area of ​​the exhaust channel (13) gradually increases in the direction away from the circuit board (9).

7. The door assembly according to any one of claims 1 to 6 further includes an air intake channel (12) extending from the lower end of the plate-shaped member (5) toward the circuit board (9).

8. The door assembly according to claim 8, wherein the flow area of ​​the air intake channel (12) gradually decreases in the direction close to the circuit board (9).

9. The door assembly according to any one of claims 1 to 7, wherein the plate-shaped member (5) is provided with a first groove for forming the exhaust passage (13), the first groove extending from the circuit board (9) toward the upper end cover, the first groove being formed by bending the plate-shaped member.

10. The door assembly according to claim 9, wherein the plate-shaped member (5) further comprises a second groove provided for accommodating the circuit board (9) and connected to the first groove, and a third groove connected to the second groove and for forming an air intake channel (12) for introducing air to cool the circuit board (9), the second groove and the third groove being formed by bending the plate-shaped member (5).

11. A household appliance, characterized in that, Includes the door assembly according to any one of claims 1 to 10.

12. The household appliance according to claim 11, including a refrigerator.

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