Household appliance

Abstract

A household appliance includes a housing defining at least one chamber, and a door movably connected to the housing by a hinge including: a plate portion fixed to one of the housing and the door and protruding toward the other of the housing and the door; the shaft part is arranged on the plate part, and the shaft part comprises a first part close to the plate part and a second part away from the plate part in the axial direction; the receiving groove is formed in the other one of the box body and the door to receive the shaft part, and the shaft part moves relative to the receiving groove in the receiving groove when the door moves relative to the box body; wherein the first part protrudes outwards from the second part at least on the first side, the second part protrudes outwards from the first part at least on the second side, and the first side and the second side are different sides of the outer side wall of the shaft part; the receiving groove is in contact with the first part and the second part along with the change of the relative position of the shaft part and the receiving groove. According to the scheme, the abrasion degree of the shaft relative to the groove during door opening and closing can be reduced, and the service life of parts is prolonged.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of household appliances, and more particularly to a household appliance. Background Art

[0002] Household appliances are widely used in people's daily life and work. For example, a refrigerator is a household appliance for storing and preserving items, and a microwave oven is used for heating or cooking food.

[0003] Generally, a household appliance uses a box body to form a chamber, and the chamber is closed by a door. The door is connected to the box body by a hinge. For example, a receiving groove is provided on the door, a hinge is installed on the box body, and the shaft of the hinge extends into the receiving groove. During the opening and closing of the door, the shaft rotates relative to the receiving groove.

[0004] With the development of home decoration, the integration of household appliances and home decoration is a very popular trend at present. Household appliances are embedded in cabinets, requiring a very small gap between the door of the household appliance and the cabinet, and at the same time, the door of the household appliance should be able to open at least 90°. This poses new challenges to the hinge. Summary of the Invention

[0005] An object of embodiments of the present disclosure is to provide an improved household appliance.

[0006] Therefore, embodiments of the present disclosure provide a household appliance, including a box body and a door. The box body defines at least one chamber. The door is movably connected to the front of the box body through a hinge to open or close at least a part of the chamber. The hinge includes: a plate portion fixed to one of the box body and the door and extending towards the other; a shaft portion provided on the plate portion. The shaft portion includes a first portion close to the plate portion and a second portion away from the plate portion along the axial direction. The household appliance further includes: a receiving groove provided in the other of the box body and the door to receive the shaft portion. During the opening of the door, the shaft portion moves relative to the receiving groove in the receiving groove to cause the door to displace in the width direction of the household appliance. Wherein, the first portion protrudes outward from the second portion at least on a first side, and the second portion protrudes outward from the first portion at least on a second side. The first side and the second side are different sides of the outer side wall of the shaft portion. As the relative position of the shaft portion and the receiving groove changes, the receiving groove contacts the first portion and the second portion respectively.

[0007] In the solution, the shaft portion moves relative to the receiving groove in the receiving groove, so that it is possible for the hinge to reduce the interference between the door and the cabinet during the opening process.

[0008] The matching design of the shaft and the groove of the existing hinge makes the shaft always in contact with the entire groove during the opening and closing of the door, resulting in serious wear of the groove, which is usually a plastic part. Long-term wear affects the service life of the parts. In contrast, in this embodiment, through the asymmetrically designed shaft part, the contact time between the shaft part and the receiving groove during the opening and closing of the door is reduced, which is beneficial to reducing the wear degree of the receiving groove and extending the service life of the parts. Specifically, the shaft part is designed into an asymmetric structure at different heights along the axial direction. During the relative movement of the shaft part in the receiving groove, the inner side wall of the receiving groove contacts the outer side walls of different heights of the shaft part respectively, so that the contact time between the inner side wall and the shaft part at the same height is reduced.

[0009] Optionally, the outer contour of the shaft part projected along the axial direction is jointly formed by the outer side walls of the first part and the second part located on different sides. Thus, the outer side walls of the first part and the second part come into contact with the receiving groove at different times. During the relative movement of the shaft part in the receiving groove, the outer side walls of different heights of the shaft part contact the receiving groove, and the contact time between the inner side wall at any height position of the receiving groove and the shaft part is greatly reduced, thereby reducing the wear degree.

[0010] Optionally, the shape of the receiving groove is polygonal, and the outer contour of the shaft part projected along the axial direction is elliptical. Thus, when the door moves away from the box body, it also moves towards the non-hinge side, thereby reducing the distance that the door body extends beyond the side of the box body when opening the door. For household appliances with an embedded installation method, such as an embedded refrigerator, adopting this embodiment can reduce the reserved gap on the side of the refrigerator, save space, be more beautiful, and achieve low cost.

[0011] Optionally, the outer side walls of the second part and the first part are coplanar on at least one side except the first side and the second side. Thus, the coplanar part can contact the receiving groove throughout the entire height, ensuring that there is sufficient contact area between the shaft part and the receiving groove, which is beneficial to improving the stability during the opening and closing of the door, and the support of the hinge for the door is also better.

[0012] Optionally, when the door is in the closed position of closing the box body, the coplanar outer side walls of the second part and the first part contact the receiving groove. At this time, the self-weight of the door acts on the area of the shaft part through the receiving groove and contacts the entire height of the receiving groove. Generally speaking, the door may stay in the closed position for a long time, and the larger contact area is beneficial to providing more reliable support, ensuring that the hinge can withstand the gravity of the door and extending the service life.

[0013] Optionally, the second part includes a first wall facing the first side, and the first part includes a second wall facing the second side. For either the first wall or the second wall, the shape of the wall's projection along the axial direction is selected from: straight line, broken line, arc, and curve. The shape of the part of the outer wall of the shaft portion that does not contact the receiving groove is less restricted and can be designed into any shape, which is beneficial to reducing the processing complexity and manufacturing cost.

[0014] Optionally, the first side and the second side are located on opposite or adjacent sides of the shaft portion. Thus, the protruding parts of the first part and the second part facing outward can be flexibly set as needed. For example, the protruding parts of the first part and the second part can be reasonably set according to the change in the force exerted by the door on the hinge side during the opening and closing of the door, so as to reduce the contact time between the receiving groove and the shaft portion while ensuring the stability of the door movement.

[0015] Optionally, the outer contour of the shaft portion's projection along the axial direction includes a first arc segment, a second arc segment, a third arc segment, and a fourth arc segment connected end to end. Among them, the extension lengths of the first arc segment and the third arc segment are greater than those of the second arc segment and the fourth arc segment. A part of the first arc segment, the second arc segment, the third arc segment, and the fourth arc segment is formed by the second part, and the remaining part is formed by the first part. Thus, the outer contour shape of the shaft portion is designed as an ellipse surrounded by two long sides and two short sides. Matching the shape of the receiving groove makes the door tend to move towards the non-hinge side during the opening process, and can better adapt to the small-gap requirements of the embedded installation method.

[0016] Optionally, the first arc segment and the third arc segment are respectively located on the first side and the second side. Thus, the first part and the second part are symmetrically designed at the shorter second arc segment and the fourth arc segment, and asymmetrically designed at the longer first arc segment and the third arc segment, which is beneficial to taking into account the overall strength of the shaft portion and reducing the wear on the receiving groove.

[0017] Optionally, the hinge is located above the door in the height direction, and the first side is closer to the box body than the second side. For the shaft portion of the upper hinge or the middle hinge connecting the lower door, during the opening and closing of the door, the self-weight of the door exerts an outward (away from the box body) force on the shaft portion through the receiving groove. Therefore, it is best for the position of the inner long side of the shaft portion close to the first part to contact the receiving groove to make the door movement more stable.

[0018] Optionally, the hinge is located below the door in the height direction, and the first side is farther from the box body than the second side. For the shaft portion of the lower hinge or the middle hinge connecting the upper door, during the opening and closing of the door, the self-weight of the door exerts an inward force on the shaft portion through the receiving groove. Therefore, it is best for the position of the outer long side of the shaft portion close to the first part to contact the receiving groove to make the door movement more stable.

[0019] Optionally, the household appliance is embedded in the cabinet. When the door is opened from the closed position to the first angle, the door moves away from the side wall of the cabinet to reduce the extent to which the door extends beyond the side of the cabinet body. Thus, through the cooperation of the receiving groove and the shaft portion, when the door is initially opened, it moves both away from the cabinet body and towards the non-hinge side, so as to reduce the extent to which the door extends beyond the side of the cabinet body and avoid interference between the door and the side wall of the cabinet.

[0020] Optionally, when the door is opened from the first angle to 90°, the door moves towards the side wall of the cabinet. Thus, after the door is opened, more internal space of the chamber can be exposed, and the drawer arranged in the chamber is easier to pull out and can be made wider, which is beneficial to increasing the actual usable volume of the user.

[0021] Optionally, the door does not exceed the side of the cabinet body in the closed state. Thus, the household appliance can be embedded in the cabinet with a minimum gap.

[0022] Optionally, the door does not exceed the side of the cabinet body when opened to the 90° state. Thus, after the household appliance is embedded in the cabinet with a small gap, it can still ensure that the door can be smoothly opened at least 90°.

[0023] Optionally, the size by which the door extends beyond the side of the cabinet body during the process of moving from the closed state to being opened to 90° is less than or equal to 4 mm. Thus, it is ensured that the door will not collide with the side wall of the cabinet during the opening process, so that the household appliance described in this embodiment can be suitable for the embedded installation method. Description of the Drawings

[0024] Figure 1 is a schematic diagram of a household appliance according to an embodiment of the present disclosure;

[0025] Figure 2 is Figure 1 a partial enlarged view of area A in

[0026] Figures 3 to 5 is a schematic diagram of a hinge according to the first embodiment of the present disclosure;

[0027] Figure 6 is a schematic diagram of the cooperation between the shaft portion and the receiving groove according to the first embodiment of the present disclosure;

[0028] Figures 7 to 11 is a schematic diagram of the cooperation between the shaft portion and the receiving groove during the door opening process according to the first embodiment of the present disclosure;

[0029] Figure 12 and Figure 13 is a schematic diagram of a hinge according to the second embodiment of the present disclosure;

[0030] Figure 14 It is a schematic diagram of the cooperation between the shaft part and the receiving groove in the second embodiment of the present disclosure;

[0031] Figures 15 to 17 It is a schematic diagram of the hinge in the third embodiment of the present disclosure;

[0032] Figure 18 It is a schematic diagram of the cooperation between the shaft part and the receiving groove in the third embodiment of the present disclosure;

[0033] Figure 19 It is when the door is opened to Figure 10 the position shown, a schematic diagram of the force at the hinge;

[0034] Figure 20 It is a schematic diagram of another household appliance in the embodiment of the present disclosure;

[0035] Figure 21 and Figure 22 are Figure 20 partial schematic diagrams of the hinge provided in area B in

[0036] Figure 23 It is a schematic diagram of the receiving groove in a variation of the embodiment of the present disclosure;

[0037] Figure 24 It is a partial schematic diagram of the hinge in another variation of the embodiment of the present disclosure;

[0038] In the drawings:

[0039] 1 - Household appliance; 10 - Cabinet; 102 - Drawer; 11 - Door; 110 - Front panel; 12 - Receiving groove; 12a - Ninth wall; 12b - Tenth wall; 12c - Eleventh wall; 2 - Hinge; 21 - Plate part; 211 - Fixing hole; 22 - Shaft part; 22a - First side; 22b - Second side; 22c - Third side; 22d - Fourth side; 221 - First part; 221a - Second wall; 221b - Third wall; 221c - Fourth wall; 221d - Fifth wall; 222 - Second part; 222a - First wall; 222b - Sixth wall; 222c - Seventh wall; 222d - Eighth wall; 223 - First arc segment; 224 - Second arc segment; 225 - Third arc segment; 226 - Fourth arc segment; 3 - Side wall of the cabinet; C - Rotation center of the door; s1 - Movement track of the rotation center of the door during opening and closing of the door; x1 - First reference line; y1 - Second reference line; L - Spacing between the door and the side wall of the cabinet; G - Gravity of the door; F1 - Support force of the lower hinge; F1' - Acting force of the self - weight of the door on the lower hinge; F2 - Tensile force of the upper hinge; F2' - Reaction force received by the upper hinge; F3 - Thrust of the lower hinge; F3' - Reaction force received by the lower hinge; x - Width direction of the household appliance; y - Depth direction of the household appliance; z - Height direction of the household appliance. Specific Embodiments

[0040] As mentioned in the background art, as a consumable part, the hinge of a household appliance has the problem of low service life, which increases the maintenance cost and affects the user experience.

[0041] Specifically, the shaft of the existing hinge is usually a complete cylinder, which always contacts the inner wall of the entire groove during the opening and closing of the door. In other words, during the opening and closing of the door, the contact time between the inner wall of the receiving groove and the shaft is equal at any height along the axial direction. The receiving groove made of plastic is severely worn, and the long-term wear affects the service life of the parts.

[0042] To solve the above technical problems, an embodiment of the present disclosure provides a household appliance, including a cabinet and a door. The cabinet defines at least one chamber. The door is movably connected to the front of the cabinet through a hinge to open or close at least a part of the chamber. The hinge includes: a plate portion fixed to one of the cabinet and the door and extending toward the other; a shaft portion disposed on the plate portion. The shaft portion includes a first portion close to the plate portion and a second portion far from the plate portion along the axial direction. The household appliance further includes: a receiving groove formed in the other of the cabinet and the door to receive the shaft portion. During the opening process of the door, the shaft portion moves relative to the receiving groove in the receiving groove to cause the door to displace in the width direction of the household appliance. Wherein, the first portion protrudes outward at least on a first side from the second portion, and the second portion protrudes outward at least on a second side from the first portion. The first side and the second side are different sides of the outer sidewall of the shaft portion. As the relative position of the shaft portion and the receiving groove changes, the receiving groove contacts the first portion and the second portion respectively.

[0043] By adopting this implementation scheme, through the asymmetrically designed shaft portion, the contact time between the shaft portion and the receiving groove during the opening and closing of the door is reduced, which is beneficial to reducing the wear degree of the receiving groove and prolonging the service life of the parts. Specifically, the shaft portion is designed with an asymmetric structure at different heights along the axial direction. During the movement of the shaft portion relative to the receiving groove in the receiving groove, the inner sidewall of the receiving groove contacts the outer sidewalls of different heights of the shaft portion respectively, so that the contact time between the inner sidewall and the shaft portion at the same height is reduced. Further, the shaft portion in this scheme moves relative to the receiving groove in the receiving groove to cause the door to displace in the width direction of the door, which makes it possible for the hinge to reduce the interference between the door and the cabinet during the opening process.

[0044] To make the above objects, features, and advantages of the present disclosure more obvious and understandable, the specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0045] Figure 1 It is a schematic diagram of a household appliance 1 according to an embodiment of the present disclosure.

[0046] The household appliance 1 may be a refrigeration appliance or a dishwasher, a microwave oven, an oven, a steamer or a steam-bake-in-one. Next, the specific contents of this embodiment are described in detail by taking a refrigeration appliance as an example. The refrigeration appliance may be, for example, a refrigerator, a freezer, a wine cabinet, etc. Figure 1 A double-door refrigerator is used as an example for illustrative demonstration. In actual application, the related design of the hinge and the receiving groove adapted to the hinge in this embodiment can also be applied to various types of refrigerators such as multi-door refrigerators, single-door refrigerators, cross-door refrigerators, etc.

[0047] For ease of description, in this embodiment, the width direction of the household appliance 1 is recorded as the x direction, the depth direction is recorded as the y direction, and the height direction is recorded as the z direction. In this embodiment, the front and rear directions refer to the y direction and the opposite direction thereof, wherein the front or the front side refers to the direction facing the user when the household appliance 1 is in use, and the rear or the rear side refers to the direction away from the user when the household appliance 1 is in use.

[0048] Specifically, refer to Figure 1 The household appliance 1 may include a housing 10 and a door 11, wherein the housing 10 defines at least one chamber, and the door 11 is movably connected to the front of the housing 10 to open or close at least a portion of the chamber. Taking a refrigerator as an example, the chamber may be, for example, a freezing chamber, a refrigerating chamber, a temperature-changing chamber, and the like.

[0049] The door 11 may include an insulating space filled with insulating material. When the door 11 closes the chamber, the insulating layer formed by the insulating space has the effect of isolating heat to ensure that the chamber has a better refrigeration / freezing effect. The door 11 may include a front panel 110, a rear wall facing the box body 10 when the door 11 is closed, and a frame arranged along the four sides of the door 11. The insulating space is located between the front panel 110 and the rear wall. In some embodiments, the front panel 110 forms at least a portion of the front boundary of the insulating space so that the insulating material contacts the rear side of the front panel 110. In other embodiments, another layer of door panel may be provided on the rear side of the front panel 110. The front panel 110 may be a metal door shell, a glass plate, or a ceramic plate.

[0050] Further, refer to Figure 1 and Figure 2 , the door 11 can be movably connected to the box body 10 via the hinge 2. Figures 3 to 5, the hinge 2 may include: a plate portion 21 fixed to one of the cabinet 10 and the door 11 and extending toward the other; a shaft portion 22 provided on the plate portion 21, the shaft portion 22 axially includes a first portion 221 close to the plate portion 21 and a second portion 222 away from the plate portion 21. In the figure, an example is shown where the plate portion 21 is fixed to the cabinet 10 and extends toward the door 11. The plate portion 21 may be provided with a plurality of fixing holes 211 for fixing members such as screws to pass through so as to fix the plate portion 21 to the cabinet 10. In the illustrated assembled state, the plate portion 21 may be a plate-like body substantially perpendicular to the z direction, and the shaft portion 22 extends from the plate portion 21 along the z direction toward the door 11. Figure 4 and Figure 5 respectively are Figure 3 side views of the shaft portion 22 in different perspectives.

[0051] The lengths of the first portion 221 and the second portion 222 extending along the z direction may be equal. In other words, the shaft portion 22 is axially divided into the first portion 221 and the second portion 222 in half along the z direction. In practical applications, the lengths of the first portion 221 and the second portion 222 extending along the z direction may also be different.

[0052] Further, continue to refer to Figure 2 , the household appliance 1 may further include a receiving groove 12 opened in the other of the cabinet 10 and the door 11 to receive the shaft portion 22. Taking Figure 1 and Figure 2 the upper hinge shown as an example, the upper hinge refers to the hinge 2 located above the door 11 along the z direction. The upper edge of the door 11 may be provided with a receiving groove 12 opening upward, and the shaft portion 22 extending downward from the plate portion 21 extends into the receiving groove 12 from the opening, as shown in Figure 2 . Further, the second portion 222 is closer to the inside of the door 11 than the first portion 221.

[0053] Further, during the movement of the door 11 relative to the cabinet 10, the shaft portion 22 moves relative to the receiving groove 12 within the receiving groove 12. In the illustrated embodiment where the receiving groove 12 is located on the door 11 and the hinge 2 is located on the cabinet 10, the shaft portion 22 remains stationary during the opening and closing of the door 11, and the receiving groove 12 rotates and moves around the shaft portion 22 as the door 11 moves. In practical applications, it may also be that the receiving groove 12 is located on the cabinet 10 and the hinge 2 is located on the door 11. At this time, during the opening and closing of the door 11, the receiving groove 12 remains stationary, and the shaft portion 22 rotates and moves within the receiving groove 12 as the door 11 moves.

[0054] Further, continue to refer to Figures 3 to 5 , the first portion 221 protrudes outward from the second portion 222 at least on the first side 22a, and the second portion 222 protrudes outward from the first portion 221 at least on the second side 22b. The first side 22a and the second side 22b are different sides of the outer sidewall of the shaft portion 22. For example, Figures 3 to 5In the first embodiment shown, the first side 22a and the second side 22b are located on opposite sides of the shaft portion 22. In practical applications, the first side 22a and the second side 22 may also be located on adjacent sides of the shaft portion 22 (similar to Figures 15 to 18 the sides where the third wall 221b and the sixth wall 222b are located and the sides where the second wall 221a and the seventh wall 222c are located in the third embodiment shown).

[0055] Further, referring to Figures 6 to 11 , as the relative positions of the shaft portion 22 and the receiving groove 12 change, the receiving groove 12 comes into contact with the first part 221 and the second part 222 respectively.

[0056] For example, the outer wall of the first part 221 includes the second wall 221a, the third wall 221b, the fourth wall 221c, and the fifth wall 221d connected end to end, and the outer wall of the second part 222 includes the first wall 222a, the sixth wall 222b, the seventh wall 222c, and the eighth wall 222d connected end to end. Among them, the second wall 221a and the seventh wall 222c are located on the same side of the shaft portion 22 (e.g., the second side 22b), the third wall 221b and the sixth wall 222b are located on the same side of the shaft portion 22, the fourth wall 221c and the first wall 222a are located on the same side of the shaft portion 22 (e.g., the first side 22a), and the fifth wall 221d and the eighth wall 222d are located on the same side of the shaft portion 22. Further, the receiving groove 12 may include the ninth wall 12a, the tenth wall 12b, and the eleventh wall 12c connected end to end.

[0057] When the door 11 is in the closed position as shown in Figure 7 , the seventh wall 222c, the third wall 221b, the sixth wall 222b, the fifth wall 221d, and the eighth wall 222d are in contact with the receiving groove 12, as shown in Figure 6 . At this time, the lower half of the eleventh wall 12c in the z direction (i.e., the section close to the inside of the door 11) is in contact with the shaft portion 22, that is, there is a non-zero gap between the second wall 221a and the eleventh wall 12c.

[0058] When the door 11 is opened to the position as shown in Figure 8 (e.g., the position where the door is opened by 30°), the third wall 221b, the sixth wall 222b, the fifth wall 221d, and the eighth wall 222d are in contact with the receiving groove 12.

[0059] When the door 11 is opened to the position as shown in Figure 9 (e.g., the position where the door is opened by 60°), the fourth wall 221c, the third wall 221b, the sixth wall 222b, the fifth wall 221d, and the eighth wall 222d are in contact with the receiving groove 12. At this time, the upper half of the tenth wall 12b in the z direction (i.e., the section close to the opening of the receiving groove 12) is in contact with the shaft portion 22, that is, there is a non-zero gap between the first wall 222a and the tenth wall 12b.

[0060] When the door 11 is opened to the position shown (for example, the position where the door is opened 90°), the third wall 221b, the sixth wall 222b, the fifth wall 221d, and the eighth wall 222d are in contact with the receiving groove 12. Figure 10 When the door 11 is opened to the position shown (for example, the position where the door is opened 120°), the seventh wall 222c, the third wall 221b, the sixth wall 222b, the fifth wall 221d, and the eighth wall 222d are in contact with the receiving groove 12. At this time, the lower half of the ninth wall 12a in the z direction (i.e., the section close to the inside of the door 11) is in contact with the shaft portion 22, that is, there is a non-zero gap between the second wall 221a and the ninth wall 12a.

[0061] When the door 11 is opened to the position shown Figure 11 When the door 11 is opened to the position shown (for example, the position where the door is opened 120°), the seventh wall 222c, the third wall 221b, the sixth wall 222b, the fifth wall 221d, and the eighth wall 222d are in contact with the receiving groove 12. At this time, the lower half of the ninth wall 12a in the z direction (i.e., the section close to the inside of the door 11) is in contact with the shaft portion 22, that is, there is a non-zero gap between the second wall 221a and the ninth wall 12a.

[0062] Therefore, by adopting this embodiment, through the asymmetrically designed shaft portion 22, the contact time between the shaft portion 22 and the receiving groove 12 during the opening and closing of the door 11 is reduced, which is beneficial to reducing the wear degree of the receiving groove 12 and extending the service life of the components. Specifically, the shaft portion 22 is designed as an asymmetric structure at different heights along the axial direction. During the relative movement of the shaft portion 22 in the receiving groove 12, the inner side walls of the receiving groove 12 are respectively in contact with the outer side walls of different heights of the shaft portion 22, so that the contact time between the inner side wall and the shaft portion 22 at the same height is reduced. For example, when the door 11 moves from Figure 6 and Figure 7 the position shown to Figure 8 the position shown, the upper half of the eleventh wall 12c does not come into contact with the shaft portion 22. Another example is that when the door 11 moves from Figure 8 the position shown to Figure 10 the position shown, the lower half of the tenth wall 12b does not come into contact with the shaft portion 22. Another example is that when the door 11 moves from Figure 10 the position shown to Figure 11 the position shown, the upper half of the ninth wall 12a does not come into contact with the shaft portion 22.

[0063] In a specific implementation, the outer contour of the projection of the shaft portion 22 along the axial direction (for example, the z direction) can be jointly formed by the outer side walls of the first portion 221 and the second portion 222 located on different sides.

[0064] For example, in Figures 3 to 11In the first embodiment shown, the outer contour of the shaft portion 22 projected in the z direction can be jointly formed by the seventh wall 222c, the sixth wall 222b (or the third wall 221b), the fourth wall 221c, and the eighth wall 222d (or the fifth wall 221d). Further, the projections of the second wall 221a and the first wall 222a in the z direction are located within the region jointly enclosed by the seventh wall 222c, the sixth wall 222b (or the third wall 221b), the fourth wall 221c, and the eighth wall 222d (or the fifth wall 221d).

[0065] For another example, in Figures 12 to 14 In the second embodiment shown, the outer contour of the shaft portion 22 projected in the z direction can be jointly formed by the seventh wall 222c, the sixth wall 222b (or the third wall 221b), the fourth wall 221c, and the eighth wall 222d (or the fifth wall 221d). Further, the projections of the second wall 221a and the first wall 222a in the z direction are located within the region jointly enclosed by the seventh wall 222c, the sixth wall 222b (or the third wall 221b), the fourth wall 221c, and the eighth wall 222d (or the fifth wall 221d).

[0066] For another example, in Figures 15 to 18 In the third embodiment shown, the outer contour of the shaft portion 22 projected in the z direction can be jointly formed by the seventh wall 222c, the sixth wall 222b, the fourth wall 221c, and the fifth wall 221d. Further, the projections of the second wall 221a, the first wall 222a, the third wall 221b, and the eighth wall 222d in the z direction are located within the region jointly enclosed by the seventh wall 222c, the sixth wall 222b, the fourth wall 221c, and the fifth wall 221d.

[0067] Thus, the outer side walls of the first part 221 and the second part 222 come into contact with the receiving groove 12 at different times. During the relative movement of the shaft portion 22 within the receiving groove 12, the outer side walls of different heights of the shaft portion 22 come into contact with the receiving groove 12, and the contact time between the inner side wall of any height position of the receiving groove 12 and the shaft portion 22 is greatly reduced, thereby reducing the degree of wear.

[0068] In a specific implementation, referring to Figure 2 、 Figure 6 、 Figures 7 to 11 、 Figure 14 and Figure 18, the shape of the receiving groove 12 can be polygonal. Specifically, the projection of the receiving groove 12 in the z direction can be triangular (or quasi-triangular, approximately triangular) and formed by connecting three equal-length line segments end to end. Correspondingly, the cross-sectional shape of the receiving groove 12 in a plane perpendicular to the z direction is approximately an equilateral triangle. In some embodiments, for ease of machining, the connection points of the three inner sidewalls of the receiving groove 12 can be designed as small arcs or small straight edges. That is to say, on the premise of not affecting the movement of the shaft portion 22 in the receiving groove 12, a part of the vertex of the receiving groove 12 can be cut off to form an irregular polygon, such as Figure 23 as shown. In a variant, the receiving groove 12 can cut off any number of vertices on the basis of the illustrated triangle to form structures such as quadrilaterals, pentagons, and hexagons.

[0069] Furthermore, the outer contour of the shaft portion 22 projected axially can be elliptical, that is to say, the shaft portion 22 can be designed as a camshaft. Refer to Figure 6 , Figure 12 and Figure 15 , the outer contour of the shaft portion 22 projected in the z direction includes a first arc segment 223, a second arc segment 224, a third arc segment 225, and a fourth arc segment 226 connected end to end. Among them, the extension lengths of the first arc segment 223 and the third arc segment 225 are greater than those of the second arc segment 222 and the fourth arc segment 226, and the first arc segment 223 and the third arc segment 225 are of equal length, and the second arc segment 222 and the fourth arc segment 226 are of equal length.

[0070] Through the cooperation of the receiving groove 12 and the shaft portion 22, when the door 11 is opened, it moves both in a direction away from the box body 10 and generates displacements in the x direction and its opposite direction. Specifically, the cooperation of the elliptical shaft portion 22 and the quasi-triangular receiving groove 12 realizes that during the opening and closing of the door 11, the inner sidewall of the receiving groove 12 moves along the outer sidewall of the shaft portion 22, and there are always three points of contact and tangency between the inner sidewall of the receiving groove 12 and the outer sidewall of the shaft portion 22. Thus, during the opening and closing of the door 11, as the shaft portion 22 rotates in the receiving groove 12, the rotation center C of the door 11 (that is, the center of the receiving groove 12) will change during the rotation process. The movement trajectory of the rotation center C of the door 11 during the opening and closing of the door is denoted as s1, Figures 7 to 11 Exemplarily shows the change process of the rotation center C of the door 11 along the movement trajectory s1 during the opening of the door 11, and conversely corresponds to the change process of the rotation center C of the door 11 along the movement trajectory s1 during the closing of the door 11.

[0071] In a typical application scenario, continue to refer to Figures 7 to 11, for a household appliance 1 installed in an embedded manner (such as an embedded refrigerator, also known as a zero - embedded refrigerator), it needs to be able to be embedded in a matching embedded cabinet (such as a cabinet). And the distance L between the side wall of the household appliance 1 and the side wall 3 of the cabinet after embedding is usually required to be kept within 4 millimeters (mm). Through the cooperation of the elliptical shaft part 22 and the triangular - like receiving groove 12, it can ensure that the door 11 will not bump into the side wall 3 of the cabinet while meeting the design requirement that the distance L does not exceed 4 mm.

[0072] Specifically, in the initial state, that is, when the door 11 is in the Figure 7 shown closed position (at this time, the opening angle of the door 11 is 0°), the side surface of the door 11 is flush with the side surface of the cabinet body 10 (corresponding to the second reference line y1), and the front surface 110 of the door 11 is also flush with the front surface of the side wall 3 of the cabinet (corresponding to the first reference line x1). In some embodiments, the door 11 does not exceed the side surface of the cabinet body 10 in the closed state.

[0073] In the initial stage of opening the door 11, that is, when the door 11 moves from Figure 7 shown opening 0° to Figure 8 shown opening 30° (the first angle) position, while the door 11 moves in a direction away from the cabinet body 10, it also moves to the non - hinge side (that is, the side away from the side wall 3 of the cabinet shown in the figure), thereby reducing the distance that the door 11 extends beyond the side surface of the cabinet body 10 (that is, the second reference line y1). Refer to Figure 7 and 8 , as the rotation center C of the door 11 moves along the movement trajectory s1 for the upper - left quarter stroke, although the corner of the door 11 will slightly extend beyond the side surface of the cabinet body 10 (that is, the second reference line y1) during the opening process of the door 11, it will not touch the side wall 3 of the cabinet.

[0074] When the door 11 is opened from 30° to 60°, that is, when the door 11 moves from Figure 8 shown position to Figure 9 shown position, the rotation center C of the door 11 moves in a direction away from the cabinet body 10 and also moves to the hinge side (that is, the side close to the side wall 3 of the cabinet shown in the figure). During this process, the rotation center C of the door 11 moves along the movement trajectory s2 for the lower - left quarter stroke. Since the corner of the door 11 and the part that rotates towards the non - hinge side as the opening angle of the door 11 changes, even if the door 11 moves towards the hinge side as a whole, it will not cause the corner to touch the side wall 3 of the cabinet.

[0075] When the door 11 is opened from 60° to 90°, that is, when the door 11 moves from Figure 9 shown position to Figure 10During the position shown, the rotation center C of the door 11 moves along the movement trajectory s1 for the lower right quarter stroke. While the door 11 moves away from the cabinet body 10, it also moves towards the hinge side, making it easier to pull out the drawer 102. Specifically, at least one drawer 102 can be arranged in the chamber for storing items. After the door 11 is opened, the drawer 102 can be pulled out or pushed back into the chamber. The movement trajectory s1 achieved through the cooperation of the elliptical shaft portion 22 and the triangular receiving groove 12 causes the whole door 11 to approach the side wall 3 of the cabinet when the door 11 is opened by 90°. Thus, the drawer 102 can be made wider, which is beneficial for increasing the actual usable volume of the user. In some embodiments, the door 11 does not exceed the side surface of the cabinet body 10 when it is in the 90° open state. Further, the door 11 moves from Figure 7 the closed state shown via Figure 8 , Figure 9 the position shown to Figure 10 the position where it is opened to 90°. During this process, the size by which the door 11 exceeds the side surface of the cabinet body 10 (i.e., exceeds the second reference line y1) is less than or equal to 4 mm. Thus, it is ensured that the door 11 will not collide with the side wall 3 of the cabinet during the opening process, enabling the household appliance 1 described in this embodiment to be suitable for the built-in installation method.

[0076] When the door 11 is opened by more than 90°, that is, when the door 11 moves further from the Figure 10 position shown to Figure 11 the position where it is opened to 120°. During this period, the rotation center C of the door 11 moves along the movement trajectory s1 for the upper right quarter stroke. While the door 11 moves towards the cabinet body 10, it also moves towards the non-hinge side, enabling a larger opening angle when the household appliance 1 is embedded in the cabinet.

[0077] Thus, by adopting this embodiment, the door 11 will not touch the side wall 3 of the cabinet from being closed to being opened to the maximum angle. It can reduce the reserved gap (i.e., the illustrated distance L) on the side of the zero-clearance refrigerator, save space, be more aesthetically pleasing, and have a low implementation cost.

[0078] In a specific implementation, the second part 222 and the first part 221 are coplanar on the outer side wall of at least one side except for the first side 22a and the second side 22b. That is to say, the first part 221 and the second part 222 are flush on at least one side of the shaft portion 22.

[0079] Specifically, the outer side wall of the shaft portion 22 has a first side 22a, a second side 22b, a third side 22c, and a fourth side 22d, where the first side 22a and the second side 22b are opposite, and the third side 22c and the fourth side 22d are opposite.

[0080] Furthermore, in the outer contour of the projection of the shaft portion 22 along the z direction, the first side 22a corresponds to the first arc segment 223, the second side 22b corresponds to the third arc segment 225, the third side 22c corresponds to the fourth arc segment 226, and the fourth side 22d corresponds to the second arc segment 224.

[0081] For example, the first part 221 and the second part 222 are coplanar on the outer sides of the third side 22c and the fourth side 22d. That is, the third wall 221b and the sixth wall 222b are coplanar, and the fifth wall 221d and the eighth wall 222d are coplanar, as Figures 3 to 5 and Figure 12 and Figure 13 shown. In a non-limiting embodiment, the shaft portion 22 may be composed of two upper and lower parts. The cross-sections of the two parts are each composed of four arc segments connected end to end. The two opposite arc segments of the upper and lower cross-sections are coincident and have the same length and radius, and the other two opposite arc segments have different lengths and radii. Among them, the longer arc segments in the arc segments with different lengths and radii are respectively tangent to the adjacent two arc segments with the same length and radius, and the longer arc segments in the arc segments with different lengths and radii of the upper and lower parts are not on the same side of the shaft portion 22.

[0082] Thus, the coplanar parts can contact the receiving groove 12 throughout the entire height, ensuring that the shaft portion 22 and the receiving groove 12 have a sufficient contact area, which is beneficial to improving the stability during the opening and closing of the door 11, and the support of the hinge 2 for the door 11 is also better.

[0083] In a variation, in the outer contour of the projection of the shaft portion 22 along the z direction, the first side 22a corresponds to the fourth arc segment 226, the second side 22b corresponds to the second arc segment 224, the third side 22c corresponds to the first arc segment 223, and the fourth side 22d corresponds to the third arc segment 225. Correspondingly, in this variation, the shaft portion 22 has an asymmetric design on the shorter two sides and a symmetric design on the longer two sides, and the two longer outer side walls are each a complete surface along the axial direction, which is beneficial to improving the structural strength of the shaft portion 22.

[0084] In a specific implementation, referring to Figure 6 , Figure 7 , Figures 12 to 14 , when the door 11 is in the closed position of closing the cabinet 10, the outer side walls (i.e., the third wall 221b, the sixth wall 222b, the fifth wall 221d, and the eighth wall 222d) where the second part 222 and the first part 221 are coplanar are in contact with the receiving groove 12. At this time, the self-weight of the door 11 (such as Figure 1 the gravity G shown) acts on the area of the shaft portion 22 through the receiving groove 12 and is in contact with the entire height of the receiving groove 12. Generally speaking, the door 11 may remain in the closed position for a long time, and a larger contact area is beneficial to providing more reliable support, ensuring that the hinge 2 can withstand the gravity G of the door 11 and extending the service life.

[0085] In a variant, the first part 221 and the second part 222 may not be coplanar on the first side 22a, the second side 22b, the third side 22c, and the fourth side 22d. For example, referring to Figures 15 to 18 , the first part 221 protrudes outward from the second part 222 on the first side 22a and the fourth side 22d, and the second part 222 protrudes outward from the first part 221 on the second side 22b and the third side 22c.

[0086] In a specific implementation, for any one of the first wall 222a and the second wall 221a, the shape of the projection of the wall along the axial direction (e.g., the z-direction) may be selected from: a straight line, a broken line, an arc, and a curve.

[0087] For example, referring to Figure 3 and Figure 6 , the projections of the first wall 222a and the second wall 221a along the z-direction may both be arcs. Among them, the radius of curvature of the arc formed by the projection of the second wall 221a along the z-direction is greater than that of the third arc segment 225, and the radius of curvature of the arc formed by the projection of the first wall 222a along the z-direction is greater than that of the first arc segment 223.

[0088] Again, for example, referring to Figure 12 , Figure 14 , Figure 15 and Figure 18 , the projections of the first wall 222a and the second wall 221a along the z-direction may both be straight lines.

[0089] Once again, for example, the projections of the first wall 222a and the second wall 221a along the z-direction may both be curves (such as a wavy line) or both be broken lines (such as a V-shape, a W-shape, etc.).

[0090] Once again, for example, the shapes of the projections of the first wall 222a and the second wall 221a along the z-direction may be different. For example, the former may be an arc and the latter may be a curve, or the former may be a straight line and the latter may be an arc.

[0091] Thus, the shape of the part of the outer wall of the shaft portion 22 that does not contact the receiving groove 12 is less restricted and can be designed into any shape, which is beneficial to reducing the processing complexity and manufacturing cost.

[0092] In a specific implementation, the parts of the first part 221 and the second part 222 that protrude outward can be flexibly set as needed. For example, the orientations of the protruding parts of the first part 221 and the second part 222 are reasonably set according to the change in the force exerted by the door 11 on the hinge side during the opening and closing of the door 11, so as to reduce the contact time between the receiving groove 12 and the shaft portion 22 on the premise of ensuring the movement stability of the door 11.

[0093] In a specific implementation, a part of the first arc segment 223, the second arc segment 224, the third arc segment 225, and the fourth arc segment 226 can be formed by the second part 222, and the remaining part can be formed by the first part 221.

[0094] In some embodiments, any one of the four arc segments can be located in the first part 221, and the remaining three can be located in the second part 222, and vice versa.

[0095] In some embodiments, 2 of the four arc segments (one long side and one short side or two long sides or two short sides) can be located in the first part 221, and the remaining 2 (one short side and one long side or two short sides or two long sides) can be located in the second part 222, and vice versa.

[0096] Thus, the outer contour shape of the shaft portion 22 is designed as an ellipse surrounded by two long sides and two short sides. Matching the shape of the receiving groove 12 causes the door 11 to have a tendency to move towards the non-hinge side during the opening process, and can better adapt to the small clearance requirements of the embedded installation method.

[0097] In a specific implementation, referring to Figures 3 to 14 , the first arc segment 223 and the third arc segment 225 can be located on the first side 22a and the second side 22b respectively. Thus, the first part 221 and the second part 222 are symmetrically designed at the shorter second arc segment 224 and the fourth arc segment 226, and are asymmetrically designed at the longer first arc segment 223 and the third arc segment 225, which is beneficial to taking into account the overall strength of the shaft portion 22 and reducing the wear on the receiving groove 12.

[0098] In a specific implementation, the hinge 2 can be located above the door 11 in the height direction (for example, the z direction). At this time, the hinge 2 can also be called an upper hinge, as shown in region A in Figure 1 . For the upper hinge, the first side 22a is closer to the cabinet 10 than the second side 22b. Further, the hinge 2 can be located below the door 11 in the height direction (for example, the z direction). At this time, the hinge 2 can also be called a lower hinge. The plate portion 21 is fixed to the bottom surface of the cabinet 10, and the shaft portion 22 extends upward from the plate portion 21 to extend into the receiving groove 12 opened in the lower edge card of the door 11. For the lower hinge, the first side 22a is farther from the cabinet 10 than the second side 22b.

[0099] Specifically, referring to Figure 1 , the door 11 is subjected to the gravity G, the supporting force F1 from the lower hinge, the pulling force F2 from the upper hinge, and the pushing force F3 from the lower hinge. At this time, the upper hinge will be subjected to the reaction force F2', and the lower hinge will be subjected to the reaction force F3' and the acting force F1' exerted by the self-weight of the door 11.

[0100] Combined with Figure 1 、Figure 7 , Figure 9 and Figure 19 , during the process of opening and closing the door 11, the right side of the shaft portion 22 of the upper hinge (i.e., the side where the second arc segment 224 is located) and the side close to the box body 10 (i.e., the side where the first arc segment 223 is located) are more likely to be stressed. Moreover, due to the inclination caused by the gravity of the door 11, the position of the shaft portion 22 close to the plate portion 21 is more stressed. For example, when the door 11 is in the closed position, the direction of the reaction force F2' received by the shaft portion 22 of the upper hinge is as shown in Figure 1 and Figure 7 . When the door 11 is opened by 60°, the reaction force F2' received by the shaft portion 22 of the upper hinge is as shown in Figure 9 . When the door 11 is opened by 90°, the reaction force F2' received by the shaft portion 22 of the upper hinge is as shown in Figure 19 .

[0101] Correspondingly, for the shaft portion 22 of the upper hinge, the right side of the shaft portion 22 is designed such that at least the first portion 221 can always be tangent to the inner side wall of the receiving groove 12 during the process of opening and closing the door 11. Further, the side of the shaft portion 22 close to the box body 10 is designed such that at least the first portion 221 is always tangent to the inner side wall of the receiving groove 12 during the period when the door 11 is opened from 30° to 90°.

[0102] For example, in the first embodiment shown in Figures 3 to 5 and the second embodiment shown in Figures 12 to 14 , the contour line of the projection of the shaft portion 22 on the fourth side 22d in the z direction (i.e., the second arc segment 224) is preferably formed by the overlap of the first portion 221 and the second portion 222 (i.e., the fifth wall 221d and the eighth wall 222d are coplanar), and the contour line of the projection of the shaft portion 22 on the first side 22a in the z direction (i.e., the first arc segment 223) is preferably formed by the first portion 221 (i.e., the fourth wall 221c protrudes towards the box body 10 beyond the first wall 222a).

[0103] Again, for example, in the third embodiment shown in Figures 15 to 18 , the contour line of the projection of the shaft portion 22 on the fourth side 22d in the z direction (i.e., the second arc segment 224) is preferably formed by the first portion 221 (i.e., the fifth wall 221d protrudes outwards beyond the eighth wall 222d), and the contour line of the projection of the shaft portion 22 on the first side 22a in the z direction (i.e., the first arc segment 223) is preferably formed by the first portion 221 (i.e., the fourth wall 221c protrudes towards the box body 10 beyond the first wall 222a).

[0104] As for the lower hinge, it is exactly the opposite. Continuing to refer to Figure 1 and Figure 19, during the process of opening and closing the door 11, the left side of the shaft portion 22 of the lower hinge (i.e., the side where the fourth arc segment 226 is located) and the side far from the cabinet 10 (i.e., the side where the third arc segment 225 is located) are more likely to be stressed. Moreover, due to the inclination caused by the gravity of the door 11, the position of the shaft portion 22 close to the plate portion 21 is stressed more. For example, when the door 11 is in the closed position, the direction of the reaction force F3' received by the shaft portion 22 of the lower hinge is as Figure 1 shown (opposite to the Figure 7 direction of F2' shown). When the door 11 is opened by 60°, the direction of the reaction force F3' received by the shaft portion 22 of the lower hinge is opposite to the Figure 9 direction of F2' shown. When the door 11 is opened by 90°, the direction of the reaction force F3' received by the shaft portion 22 of the lower hinge is as Figure 19 shown.

[0105] Correspondingly, for the shaft portion 22 of the lower hinge, at least the first portion 221 on the left side of the shaft portion 22 is designed to always be tangent to the inner side wall of the receiving groove 12 during the process of opening and closing the door 11. Further, the side of the shaft portion 22 far from the cabinet 10 is designed such that at least the first portion 221 is always tangent to the inner side wall of the receiving groove 12 during the period when the door 11 is opened from 30° to 90°. For example, the shaft portion 22 shown in Figures 2 to 18 can be applied to the lower hinge in such a way that the first side 22a is farther from the cabinet 10 than the second side 22b (as shown by the Figure 24 upper shaft portion 22). Thus, it is beneficial to reduce the inclination of the door 11.

[0106] Figure 20 is a schematic diagram of another household appliance 1 according to an embodiment of the present disclosure. Different from the household appliance 1 shown in the above Figure 1 embodiment shown, Figure 20 the household appliance 1 shown is a cross-door structure, that is, four doors 11 are arranged side by side in the left-right and up-down directions in front of the cabinet 10, and the upper and lower edge clamps of each door 11 are connected to the cabinet 10 through hinges 2.

[0107] Further, two doors 11 arranged side by side in the z direction can share a hinge 2, as shown in Figure 20 region B, and this hinge 2 can also be called a middle hinge. Different from the hinge 2 (upper hinge or lower hinge) shown in the above Figures 3 to 18 embodiment shown, referring to Figure 21 and Figure 22 , the middle hinge includes a plate portion 21 and two shaft portions 22 extending from the plate portion 21 toward both sides in the z direction. Among them, the shaft portion 22 extending upward is suitable to be used as a lower hinge to connect the upper door 11 among the two doors 11 arranged side by side in the z direction, and the shaft portion 22 extending downward is suitable to be used as an upper hinge to connect the lower door 11 among the two doors 11 arranged side by side in the z direction.

[0108] In some embodiments, the two shaft portions 22 of the middle hinge may also adopt the same shape design. For example, referring to Figure 21 and Figure 22 , both shaft portions 22 are designed such that the first portion 221 protrudes outward from the second portion 222 on the first side 22a, the second portion 222 protrudes outward from the first portion 221 on the second side 22b, and the first side 22a of both shaft portions 22 is the side closer to the box body 10. Thus, demolding is convenient during processing and it is easy to manufacture.

[0109] Furthermore, the plate portion 21 and the two shaft portions 22 may be integrally formed.

[0110] In some embodiments, the specific shapes of the two shaft portions 22 of the middle hinge may be independently designed. For example, referring to Figure 24 , both shaft portions 22 are designed such that the first portion 221 protrudes outward from the second portion 222 on the first side 22a, the second portion 222 protrudes outward from the first portion 221 on the second side 22b, wherein the first side 22a of the shaft portion 22 closer to the bottom in the illustrated perspective is closer to the box body 10, and the second side 22b of the shaft portion 22 closer to the top in the illustrated perspective is closer to the box body 10. Thus, the influence of the force exerted by the door 11 on the shaft portions 22 at different positions of the door 11 can be given priority consideration, so that the movement of the door 11 is more stable during the opening and closing of the door 11.

[0111] Furthermore, the plate portion 21 and the two shaft portions 22 may be separately manufactured and then connected together, for example, connected together by welding, riveting, etc.

[0112] As described above, for the shaft portion 22 of the upper hinge or the middle hinge connecting the lower door 11, during the opening and closing of the door 11, the self-weight of the door 11 exerts an outward (away from the box body 10) force on the shaft portion 22 through the receiving groove 12. Therefore, the position of the long side of the shaft portion 22 closer to the inside (i.e., closer to the box body 10) near the first portion 221 preferably contacts the receiving groove 12 to make the movement of the door 11 more stable.

[0113] For the shaft portion 22 of the lower hinge or the middle hinge connecting the upper door 11, during the opening and closing of the door 11, the self-weight of the door 11 exerts an inward (i.e., closer to the box body 10) force on the shaft portion 22 through the receiving groove 12. Therefore, the position of the long side of the shaft portion 22 closer to the outside (i.e., away from the box body 10) near the first portion 221 preferably contacts the receiving groove 12 to make the movement of the door 11 more stable.

[0114] Although the specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when a single embodiment is described only with respect to a specific feature. The examples of features provided in the present disclosure are intended to be illustrative rather than limiting, unless stated otherwise. In a specific implementation, the technical features of one or more dependent claims may be combined with the technical features of the independent claim, and the technical features from the corresponding independent claims may be combined in any appropriate manner rather than only through the specific combinations recited in the claims.

[0115] Although the present disclosure has been disclosed as above, the present disclosure is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the scope defined by the claims.

Claims

1. A household appliance, comprising a housing (10) and a door (11), wherein the housing (10) defines at least one chamber, and the door (11) is movably connected to the front of the housing (10) via a hinge (2) to open or close at least a part of the chamber, characterized in that: The hinge (2) comprises: a plate portion (21) fixed to one of the box body (10) and the door (11) and extending toward the other; an axis portion (22) arranged on the plate portion (21), wherein the axis portion (22) comprises a first portion (221) close to the plate portion (21) and a second portion (222) away from the plate portion (21) along the axial direction; The household appliance further comprises: a receiving groove (12) provided in the other of the box body (10) and the door (11) for receiving the shaft portion (22); when the door (11) is opened, the shaft portion (22) moves relative to the receiving groove (12) in the receiving groove (12) so that the door (11) is displaced in the width direction of the household appliance; The first portion (221) protrudes outward from the second portion (222) at least on a first side (22a), and the second portion (222) protrudes outward from the first portion (221) at least on a second side (22b), and the first side (22a) and the second side (22b) are different sides of the outer side wall of the shaft portion (22); as the relative position of the shaft portion (22) and the receiving groove (12) changes, the receiving groove (12) contacts the first portion (221) and the second portion (222) respectively.

2. The household appliance according to claim 1, characterized in that: The outer contour of the shaft portion (22) projected along the axial direction is formed by the outer side walls of the first portion (221) and the second portion (222) located on different sides.

3. The household appliance according to claim 2, characterized in that: The receiving groove (12) is in the shape of a polygon, and the outer contour of the shaft portion (22) projected along the axial direction is in the shape of an ellipse.

4. The household appliance according to claim 1, characterized in that: The outer side walls of the second portion (222) and the first portion (221) on at least one side other than the first side (22a) and the second side (22b) are coplanar.

5. The household appliance according to claim 4, characterized in that: When the door (11) is in a closed position for closing the box body (10), the outer side walls of the second part (222) and the first part (221) that are coplanar are in contact with the receiving groove (12).

6. The household appliance according to claim 1, characterized in that: The second portion (222) includes a first wall (222a) facing the first side (22a), and the first portion (221) includes a second wall (221a) facing the second side (22b). For any one of the first wall (222a) and the second wall (221a), the shape of the wall projected along the axial direction is selected from: a straight line, a broken line, an arc and a curve.

7. The household appliance according to claim 1, characterized in that: The first side (22a) and the second side (22b) are located on opposite or adjacent sides of the shaft portion (22).

8. The household appliance according to claim 1, characterized in that: The outer contour of the shaft portion (22) projected along the axial direction includes a first arc segment (223), a second arc segment (224), a third arc segment (225) and a fourth arc segment (226) connected end to end, wherein the extension length of the first arc segment (223) and the third arc segment (225) is greater than the extension length of the second arc segment (224) and the fourth arc segment (226), and a portion of the first arc segment (223), the second arc segment (224), the third arc segment (225) and the fourth arc segment (226) is formed by the second portion (222), and the remaining portion is formed by the first portion (221).

9. The household appliance according to claim 8, characterized in that: The first arc segment (223) and the third arc segment (225) are located on the first side (22a) and the second side (22b) respectively.

10. The household appliance according to claim 9, characterized in that: The hinge (2) is located above the door (11) in the height direction, and the first side (22a) is closer to the box body (10) than the second side (22b).

11. The household appliance according to claim 9, characterized in that: The hinge (2) is located below the door (11) in the height direction, and the first side (22a) is farther away from the box (10) than the second side (22b).

12. The household appliance according to any one of claims 1 to 11, characterized in that: The household appliance is embedded in a cabinet, and when the door (11) is opened from a closed position to a first angle, the door (11) moves in a direction away from a side wall (3) of the cabinet to reduce the extent to which the door (11) protrudes beyond the side of the box body (10).

13. The household appliance according to claim 12, characterized in that: When the door (11) opens from the first angle to 90°, the door (11) moves toward the side wall (3) of the cabinet.

14. The household appliance according to any one of claims 1 to 11, characterized in that: The door (11) does not extend beyond the side of the box (10) when in a closed state; and / or The door (11) does not extend beyond the side of the box body (10) when opened to 90°; and / or The dimension of the door (11) extending beyond the side surface of the box body (10) during the process of moving from a closed state to opening to 90° is less than or equal to 4 mm.

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