Door assembly of household appliance and household appliance

Abstract

The invention discloses a door assembly of a household appliance and the household appliance. The door assembly of the household appliance comprises a display screen; the circuit board is in signal connection with the display screen and is arranged on the inner side of the display screen; the plate-shaped component is overlapped with the display screen and is positioned on one side, far away from the display screen, of the circuit board; the exhaust channel extends from the circuit board to the upper end of the plate-shaped component so as to exhaust air after cooling the circuit board; the upper end cover covers the upper end of the exhaust channel and is provided with an exhaust hole communicated with the exhaust channel; the first groove body is arranged below the upper end cover and comprises a first groove bottom, two first groove frames and a first opening, the two first groove frames are arranged at the two ends, in the thickness direction of the door assembly, of the first groove bottom respectively, and the first opening is opposite to the first groove bottom and faces the upper end cover; a first groove frame of the first groove body and the upper end cover are arranged at an interval to form an exhaust part connected with the exhaust channel; and the dustproof component is arranged on the exhaust part and is configured to circulate air after heat exchange for the circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a door assembly of a household appliance and the household appliance. Background Art

[0002] With the development of Internet of Things (IoT) technology, smart home devices are becoming increasingly popular. In terms of refrigerators, consumers not only pursue the basic functions of freezing and refrigeration, but also hope that it can provide smarter, more personalized and more integrated services, such as viewing online recipes, healthy diet management, smart shopping lists, home entertainment, etc. This makes refrigerators equipped with displays one of the market options.

[0003] At present, the progress of high-resolution display and touch technology has made it a development trend for refrigerator products to integrate larger, smarter screens and high-quality displays. However, the integration and thermal power of the PCB board of the display controller are constantly increasing. If the heat generated during operation cannot be dissipated in time, it will cause the PCB board to overheat, causing system freezes, reducing display effects, shortening component life and other problems, seriously affecting user experience. Summary of the invention

[0004] The present invention aims to provide a door assembly of a household appliance and the household appliance, so as to improve the problem of system freezing caused by overheating of the display system in the prior art.

[0005] According to one aspect of an embodiment of the present invention, the present invention provides a door assembly of a household appliance, the door assembly comprising:

[0006] Display screen;

[0007] The circuit board is connected to the display screen signal and is arranged on the inner side of the display screen;

[0008] A plate-shaped component, overlapped with the display screen and located on a side of the circuit board away from the display screen;

[0009] An exhaust passage extends from the circuit board toward the upper end of the plate-shaped component to exhaust air after cooling the circuit board;

[0010] An upper end cover is disposed at the upper end of the exhaust passage and is provided with an exhaust hole communicating with the exhaust passage; and

[0011] A first groove body is arranged below the upper end cover, the first groove body comprises a first groove bottom, two first groove frames respectively arranged at two 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 end cover, and a first groove frame of the first groove body is spaced apart from the upper end cover to form an exhaust portion connected to the exhaust passage;

[0012] The dustproof component is arranged on the exhaust part and is configured to circulate the air after the heat exchange of the circuit board.

[0013] In some embodiments, the door assembly also includes a second trough body disposed below the upper end cover, the second trough body is disposed at one end of the first trough body along the thickness direction of the door assembly away from the dustproof component, the second trough body includes a second trough bottom, two second trough frames respectively disposed at both ends of the second trough bottom along the thickness direction of the door assembly, and a second opening opposite to the second trough bottom, the second opening faces the upper end cover, the second trough frame on the side of the second trough body close to the first trough body is spaced apart from the upper end cover to form a gas channel connecting the exhaust part and the exhaust port on the upper end cover, and the opening of the second trough body is located directly below the exhaust hole.

[0014] In some embodiments, the second groove bottom is higher than the first groove bottom, and the second groove frame of the second groove body close to the first groove body is lower than the second groove frame away from the first groove body and is spaced apart from the upper end cover.

[0015] In some embodiments, the dust-proof component includes a grille plate, the upper end of the grille plate abuts against the upper end cover, and the lower end of the grille plate abuts against the first slot frame of the first slot body.

[0016] In some embodiments, the door assembly further comprises:

[0017] A fan is disposed between the display screen and the plate-shaped component and is configured to provide cooling air to the circuit board;

[0018] a temperature sensor configured to detect a temperature of the circuit board;

[0019] The controller is connected to the temperature sensor and the fan respectively so as to start the fan when the temperature of the circuit board is higher than the set temperature.

[0020] In some embodiments, the flow area of ​​the exhaust channel gradually increases in a direction away from the circuit board.

[0021] In some embodiments, the invention further includes an air inlet passage extending from the lower end of the plate-shaped component toward the circuit board.

[0022] In some embodiments, the flow area of ​​the air inlet passage gradually decreases in a direction approaching the circuit board.

[0023] In some embodiments, a first groove for forming an exhaust channel is provided on the plate-like component. The first groove extends from the circuit board toward the upper end cover, and the first groove is formed by bending the plate-like component.

[0024] In some embodiments, the plate-like component also includes a second groove provided for accommodating the 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 for cooling the circuit board. The second groove and the third groove are formed by bending the plate-like component.

[0025] According to another aspect of the present invention, a household appliance is provided. The household appliance comprises the above-mentioned door assembly.

[0026] In some embodiments, the household appliance includes a refrigerator.

[0027] By applying the technical solution of the present invention, the door assembly is provided with an exhaust channel. The density of the air after the circuit board is cooled down decreases due to the increase in temperature. The hot air flows upward and is discharged from the exhaust hole, and the air with reduced temperature flows downward and continues to cool the circuit board, thereby helping to reduce the temperature of the circuit board and the electronic components installed thereon, and helping to improve the problems that seriously affect the user experience, such as system freezes, reduced display effects, shortened component life, etc., caused by excessively high temperature of the circuit board.

[0028] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 A schematic diagram showing the structure of household appliances according to some embodiments of the present invention;

[0031] Figure 2 An exploded view of a door assembly of a household appliance showing some embodiments of the present invention;

[0032] Figure 3 A schematic diagram showing the internal structure of a door assembly of a household appliance according to some embodiments of the present invention;

[0033] Figure 4 A schematic structural diagram showing a cross section of a door assembly of a household appliance according to some embodiments of the present invention;

[0034] Figure 5 Shows Figure 4 A partial enlarged view of

[0035] Figure 6 A schematic structural diagram showing a first slot body and a second slot body of a door assembly of a household appliance in some embodiments of the present invention;

[0036] Figure 7 A schematic diagram showing the layout of the exhaust air flow path of the door assembly of a household appliance in some embodiments of the present invention;

[0037] Figure 8 A schematic diagram showing the structure of a circuit board of a door assembly of a household appliance in some embodiments of the present invention;

[0038] Fig. 9 A block diagram showing a control system of a door assembly of a household appliance according to some embodiments of the present invention;

[0039] Fig.10 A control flow chart of a door assembly of a household appliance according to some embodiments of the present invention is shown.

[0040] In the figure:

[0041] 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. Upper end cover; 12. Inlet channel; 13. Exhaust channel; 14. Dust cover; 15. Air flow path; 16. First trough body; 17. Second trough body; 18. Exhaust hole; 19. Dustproof component; 20. Temperature sensor; 21. Controller; 100. Door assembly; 200. Box body. DETAILED DESCRIPTION

[0042] 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, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate positions or positional relationships only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0046] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0047] If there is no special explanation, the "include" and "comprising" mentioned in the present invention represent open-ended or closed-ended expressions. For example, "include" and "comprising" may represent that other components not listed may also be included or may only include or comprise the listed components.

[0048] If not specifically stated, in the present invention, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": 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 The schematic diagram of the structure of the household appliance of this embodiment is shown in FIG. Figure 1 The household appliance of this embodiment includes a cabinet 200 having an opening and a door assembly 100 disposed on the opening of the cabinet 200. In some embodiments, the household appliance includes a refrigerator.

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

[0051] The circuit board 9 is connected to the display screen 8 by signals and is disposed on the inner side of the display screen 8. The plate-shaped component 5 is overlapped with the display screen 8 and is located on the side of the circuit board 9 away from the display screen 8. The exhaust passage 13 extends from the circuit board 9 toward the upper end of the plate-shaped component 5 to exhaust the air after cooling the circuit board 9.

[0052] The upper end cover 11 is disposed on the upper end of the exhaust passage 13 and is provided with an exhaust hole 18 communicating with the exhaust passage 13. The first groove body 16 is disposed below the upper end cover 11, and the first groove body 16 includes a first groove bottom 16a, two first groove 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 facing the upper end cover 11, and a first groove frame 16b of the first groove body 16 is spaced apart from the upper end cover 11 to form an exhaust portion connected to the exhaust passage 13. The dustproof component 19 is disposed on the exhaust portion and is configured to circulate air after heat exchange for the circuit board 9.

[0053] In this embodiment, the door assembly 100 is provided with an exhaust passage 13. The density of the air after the circuit board 9 is cooled down decreases due to the increase in temperature. The hot air flows upward and is discharged from the exhaust hole 18, and the air with reduced temperature flows downward and continues to cool the circuit board 9, thereby helping to reduce the temperature of the circuit board 9 and the electronic components mounted thereon, and helping to improve the problems that seriously affect the user experience, such as system freezes, reduced display effects, shortened component life, etc., caused by the excessive temperature of the circuit board 9.

[0054] See also Figure 4 and Figure 5 After the circuit board 9 is cooled, the high-temperature air is discharged through the exhaust hole 18 and meets the low-temperature air outside the door assembly 100. Especially when the indoor temperature is low, the water in the air may condense into condensed water. The first groove body 16 under the upper end cover 11 can be used to accumulate the above-mentioned condensed water, which is helpful to prevent condensed water or water from entering the door assembly 100 through the exhaust channel 13 and affecting the circuit board 9 and other electrical components.

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

[0056] Furthermore, the air after cooling the circuit board 9 passes through the first slot body 16 and is then discharged from the exhaust hole 18. The hot air flowing through the first slot body 16 is beneficial to the evaporation of moisture in the first slot body 16, thereby accumulating unexpected water again, and is also beneficial to ensuring a dry environment in the door assembly 100.

[0057] Furthermore, the exhaust hole 18 is disposed on the upper end cover 11 which is not easily observed, and the exhaust hole is concealed, which is beneficial to ensuring the coordinated, simple and beautiful appearance of the household appliance.

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

[0059] Dust or water outside the door assembly 100 first falls into the second slot 17. When the water or dust fills the second slot 17, it can overflow into the first slot 16 to prevent a large amount of dust and water generated under extreme working conditions, which is beneficial 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 frame 17a of the second groove body 17 close to the first groove body 16 is lower than the second groove frame 17a away from the first groove body 16 and higher than the first groove frame 16a of the first groove body 16 away from the second groove body 17.

[0061] See also Figure 5 and Figure 6 The exhaust hole 18 is located directly above the second slot body 17. On the flow path from the exhaust channel 13 to the exhaust hole 18, the first slot frame 16a of the first slot body 16 away from the second slot body 17 and the second slot frame 17a of the second slot body 17 close to the first slot body 16 gradually rise, which is conducive to the smooth discharge of air, thereby ensuring the cooling effect, and is conducive to improving the system freeze, reduced display effect, shortened component life and other problems seriously affecting the user experience caused by the excessive temperature of the circuit board 9.

[0062] See also Figure 4 and 5 The upper end cover 11 is provided with an opening, which is located above the first trough body 16 and the second trough body 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 plate, the upper end of which abuts against the upper end cover 11, and the lower end of which abuts against the first slot frame of the first slot body 16. The grille plate can effectively prevent dust from entering the exhaust passage 13 and adhering to the surface of the electrical components, which is beneficial to ensure the heat dissipation effect of the electrical components and prevent the electrical components from affecting normal operation due to poor heat dissipation.

[0064] The door assembly further includes a fan 10, a temperature sensor 20 and a controller 21. The fan 10 is disposed between the display screen 8 and the plate-shaped member 5 and is configured to provide cooling air for 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 the temperature sensor 20 and the fan 10, respectively, 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 a set temperature.

[0065] The fan 10 is used to provide cooling air for electrical components such as the circuit board 9, which is beneficial to improving the cooling efficiency to ensure the temperature of the electrical components. Furthermore, the fan 10 starts to run when the temperature is higher than the set temperature and shuts down when the temperature is lower than the set temperature. Intelligent control of the fan start and stop is adopted to effectively reduce the noise generated when the fan is running, thereby improving 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 is conducive to the smooth discharge of the air after the circuit board 9 is cooled, thereby ensuring the cooling effect of the circuit board 9, and is conducive to improving the system freeze, display effect reduction, component life shortening and other problems seriously affecting the user experience caused by the excessive temperature of the circuit board 9. Furthermore, the flow area of ​​the exhaust channel 13 gradually increases, which is conducive to improving the smoothness of air flow, avoiding excessive noise, and improving the user experience.

[0067] The door assembly further includes an air inlet passage 12 extending from the lower end of the plate-like component 5 toward the circuit board 9, and the air inlet passage 12 introduces air for cooling the circuit board 9, thereby ensuring that sufficient air is provided to the circuit board 9. Furthermore, the inlet end of the air inlet passage 12 is arranged at the lower end of the door assembly which is not easily observed, and the air inlet is designed in a hidden manner, which is conducive to ensuring the coordinated, simple and beautiful appearance of the household appliance.

[0068] In some embodiments, the flow area of ​​the air inlet channel 12 gradually decreases in the direction close to the circuit board 9, and the inlet end of the air inlet 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 conducive to ensuring the cooling effect on the circuit board 9. Furthermore, the flow area of ​​the air inlet channel 12 gradually becomes smaller, which is conducive to improving the smoothness of air flow, avoiding excessive noise, and improving user experience.

[0069] In some embodiments, the plate-like component 5 is provided with a first groove for forming the exhaust passage 13, the first groove extends from the circuit board 9 toward the upper end cover, and the first groove is formed by bending the plate-like component. The first groove for forming the exhaust passage 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-like component 5 is conducive to improving the torsional strength of the plate-like component, thereby improving the firmness of the door assembly.

[0070] In some embodiments, the plate-like component 5 also includes a second groove for placing the circuit board 9 and connected to the first groove, and a third groove connected to the second groove and used to form an air intake channel 12 for introducing air to cool the circuit board 9. The second groove and the third groove are formed by bending the plate-like component 5.

[0071] The first groove, the second groove and the third groove are connected to each other to form an air conditioning flow channel from bottom to top, which is conducive to the smooth flow of air to dissipate heat and cool the circuit board 9 to ensure the normal operation of electrical components such as the circuit board 9. Furthermore, the first groove, the second groove and the third groove are formed by pressing a plate, which has the advantages of simple structure, low cost and high production efficiency. The plate-like component 5 forms a bending structure, which is conducive to improving the anti-torsion effect of the plate-like component, thereby improving the firmness of the door assembly.

[0072] See also Figure 2 The door assembly 100 of the present embodiment further includes a bracket 6 disposed between the plate-shaped component 5 and the display screen 8 and used for supporting the display screen 8 .

[0073] See also Figure 2 The door assembly 100 of this embodiment further comprises a door frame 2, and a plate-like component 5 is embedded in the door frame 2. A side of the plate-like component 5 away from the display screen 8 is formed with a protrusion corresponding to the first groove, the second groove and the third groove. A foam board 4 is provided on the side of the plate-like component 5 away from the display screen 8, and a concave portion matching the above-mentioned protrusion is provided on the side of the foam board 4 facing the plate-like component 5. The foam board 4 is provided on the side of the plate-like component 5 away from the display screen 8.

[0074] The door assembly 100 further includes a vacuum insulation panel 3 (VIP panel) provided on a side of the foam panel 4 away from the plate-like component 5 and a door lining 1 provided on a side of the vacuum insulation panel 3 away from the foam panel 4. The door lining 1, the vacuum insulation panel 3 and the foam panel 4 are all embedded in the door frame 2. The door assembly 100 further includes a transparent panel 7 covering the outside of the display screen 8.

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

[0076] like Figure 7 FIG. 1 is a schematic diagram of the structural layout of the door assembly 100, which is divided into a display screen 8, a door cavity, a plate-like component 5, a first dust storage chamber (a first trough 16), and a second dust storage chamber (a second trough 17). Figure 2 The exploded diagram of the door assembly 100, the door lining 1 and the door frame 2 and the transparent panel 7 constitute the external structure of the door body. The internal structure of the door body is as follows: the vacuum insulation panel 3 and the foam board 4 play the role of heat insulation, the vacuum insulation panel 3 is embedded in the foam board 4, the vacuum insulation panel 3 is a two-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 volume ratio of the refrigerator. The foam board 4 and the plate-like component 5 are bonded by 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 by a pressure-sensitive adhesive. The heat dissipation duct system is as follows Figure 4 As shown, the circuit board 9 is mounted on the display screen bracket 6 and embedded in the plate-shaped component 5, and the heat dissipation duct is between the display screen bracket 6 and the plate-shaped component 5. Figure 3 As shown, the heat dissipation air duct includes an air inlet channel 12 and an air outlet channel 13. The active heat dissipation temperature control system is as shown in FIG. Figure 5 As shown, the temperature sensor 20 is mounted on the circuit board 9. The temperature sensor 20 obtains the temperature of the controller, and the controller controls the start and stop and the speed of the brushless DC fan.

[0077] The heat dissipation duct in this embodiment is arranged up and down rather than left and right, and 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 respectively located at the lower end and the upper end of the refrigerator door. The advantages are: the air inlet and the air outlet are arranged up and down, and the hidden design improves the overall coordination of the refrigerator appearance, makes the refrigerator look more simple and beautiful in visual effect, and reduces the user's perception of the heat dissipation duct during experience; the hot air discharged from the circuit board in the door body naturally rises due to its low density, and is more easily discharged through the exhaust holes at the upper end of the door body.

[0078] The door frame is provided with an exhaust hole 18 connected 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 hole 18 under the action of gravity. If an isolation structure is not provided (the dustproof component 19 is used to prevent dust from entering the inner cavity of the door assembly 100, and the first groove body 16 and the second groove body 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 to short-circuit the electronic components, seriously affecting the operation of the large-screen display. Figure 5 and 6As shown, the first dust chamber and the second dust chamber designed on the inner side of the upper end cover 11 are isolation structures designed in this embodiment, and the second dust chamber is connected to the exhaust hole. A plate-shaped component 5 is arranged between the second dust chamber and the first dust chamber. When the second dust chamber is full of dust or water, the dust or water will flow into the first dust chamber to prevent a large amount of dust and water generated under extreme working conditions. Furthermore, when the heat dissipation fan 10 in the door assembly 100 is working, the hot air discharged through the heat dissipation air duct is beneficial to the evaporation of water in the dust chamber, thereby keeping the dust chamber dry.

[0079] Active cooling system flow chart Fig. 9 and 10 As shown, when the refrigerator is running, the temperature sensor 20 monitors the temperature of the controller 21, and 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 is turned off and the temperature sensor 20 continues to monitor the temperature of the controller 21.

[0080] The specific working process of the door cavity active cooling system is as follows:

[0081] When the refrigerator is running and the large screen is working, the circuit board 9 integrating various heat-generating electronic components accumulates a lot of heat after working for a certain period of time. The temperature of the door cavity (i.e., the cavity between the plate-like component 5 and the screen 8) rises, causing the temperature of the controller to rise. The temperature sensor 20 obtains the controller temperature T1 at a frequency f. When the monitored temperature is greater than the set temperature Tn, the active heat dissipation temperature control system starts, and the brushless heat dissipation fan runs at a speed n to take away the accumulated heat in the cavity. The gas flows to the heat dissipation duct as shown in the figure. Figure 4 and 5 When the brushless cooling fan 10 is running, the chamber is divided into an air intake channel 12 and an exhaust channel 13, wherein the air is under negative pressure during inhalation; under the action of atmospheric pressure, the air enters the air intake channel 12 through the row holes designed at the bottom of the door frame, and the outlet of the air intake channel is connected to the air intake of the brushless cooling fan, and the air outlet of the brushless cooling fan is connected to the inlet of the exhaust channel 13. The air enters the exhaust channel 13 through the brushless cooling fan, and the heat accumulated in the exhaust channel 13 passes through the first dust accumulation chamber, the second dust accumulation chamber, and the upper end cover 11 in turn, and is taken out of the door.

[0082] The following are specific cases:

[0083] The refrigerator is running, the large screen display works for 30 minutes, the temperature sensor monitors the controller temperature at 85°C, the controller determines that the door cavity temperature is 5°C higher than the preset temperature (80°C), and starts the brushless DC fan at 500r / min. When the temperature sensor monitors the controller temperature at 75°C, the fan is turned off.

[0084] According to another aspect of the present invention, a household appliance is further provided, the household appliance comprising the above-mentioned door assembly. In some embodiments, the household appliance comprises a refrigerator.

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

[0086] 1. By adopting the active heat dissipation strategy of the fan and the heat dissipation air duct guide structure, the method of intelligent temperature control of the display is realized, which is efficient and energy-saving and effectively prolongs the service life of the product;

[0087] 2. By intelligently controlling the start and stop of the fan, the noise generated by the fan during operation can be effectively reduced, thus improving the user experience;

[0088] 3. The hidden arrangement of the upper and lower ends of the air inlet and outlet makes the refrigerator look more coordinated, simple and beautiful;

[0089] 4. The first dust chamber and the second dust chamber are integrated at the air outlet of the heat dissipation duct. The three are designed in one piece, integrating waterproof, dustproof and air outlet functions, and effectively using the blown hot air to clean the dust and accumulated water in the dust chamber.

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

Claims

1. A door assembly for a household appliance, characterized in that: include: Display screen (8); A circuit board (9) connected to the display screen (8) for signal connection and arranged on the inner side of the display screen (8); A plate-shaped component (5) overlapped with the display screen (8) and located on a side of the circuit board (9) away from the display screen (8); An exhaust passage (13) extending from the circuit board (9) toward the upper end of the plate-shaped component (5) to exhaust air after cooling the circuit board (9); an upper end cover (11), which is disposed on the upper end of the exhaust passage (13) and is provided with an exhaust hole (18) communicating with the exhaust passage (13); and a first groove body (16) disposed below the upper end cover (11), the first groove body (16) comprising a first groove bottom (16a), two first groove side frames (16b) respectively disposed at two 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 facing the upper end cover (11), a first groove side frame (16b) of the first groove body (16) being spaced apart from the upper end cover (11) to form an exhaust portion connected to the exhaust passage (13); A dustproof component (19) is arranged on the exhaust portion and is configured to circulate air after heat exchange for the circuit board (9).

2. The door assembly according to claim 1, characterized in that The invention also comprises a second trough body (17) arranged below the upper end cover (11), the second trough body (17) being arranged at one end of the first trough body (16) in the thickness direction of the door assembly (100) away from the dustproof component (19), the second trough body (17) comprising a second trough bottom (17a), two second trough frames (17b) respectively arranged at two ends of the second trough bottom (17a) in the thickness direction of the door assembly (100), and a second opening opposite to the second trough bottom (17a), the second opening facing the upper end cover (11), the second trough frame (17b) on one side of the second trough body (17) close to the first trough body (16) being spaced apart from the upper end cover (11) to form a gas passage connecting the exhaust portion and the exhaust hole (18) on the upper end cover (11), and the opening of the second trough body (17) being located directly below the exhaust hole (18).

3. The door assembly according to claim 2, characterized in that The second groove bottom (17a) is higher than the first groove bottom (16a), and a second groove frame (17a) of the second groove body (17) close to the first groove body (16) is lower than a second groove frame (17a) away from the first groove body (16) and is spaced apart from the upper end cover (11).

4. The door assembly according to claim 1, characterized in that The dustproof component (19) comprises a grid plate, the upper end of the grid plate abuts against the upper end cover (11), and the lower end of the grid plate abuts against the first slot frame of the first slot body (16).

5. The door assembly according to claim 1, characterized in that Also includes: a fan (10), disposed between the display screen (8) and the plate-shaped component (5) and configured to provide cooling air for the circuit board (9); A temperature sensor (20) 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 a set temperature.

6. The door assembly according to claim 1, characterized in that The flow area of ​​the exhaust channel (13) gradually increases in a direction away from the circuit board (9).

7. The door assembly according to claim 1, characterized in that It also includes an air intake passage (12) extending from the lower end of the plate-shaped component (5) toward the circuit board (9).

8. The door assembly according to claim 8, characterized in that The flow area of ​​the air inlet passage (12) gradually decreases in a direction approaching the circuit board (9).

9. The door assembly according to claim 1, characterized in that The plate-like component (5) is provided with a first groove for forming the exhaust passage (13); the first groove extends from the circuit board (9) toward the upper end cover; the first groove is formed by bending the plate-like component.

10. The door assembly according to claim 9, characterized in that The plate-like component (5) further comprises a second groove connected to the first groove and used for accommodating the circuit board (9), and a third groove connected to the second groove and used for forming an air intake passage (12) for introducing air for cooling the circuit board (9); the second groove and the third groove are formed by bending the plate-like component (5).

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

12. The household appliance according to claim 11, characterized in that: Includes refrigerator.

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