Door opening and closing mechanisms and dishwashers

Abstract

The present application provides a door opening and closing device and a dishwasher, and relates to the technical field of kitchen appliances. The door opening and closing device includes a hinge assembly and a drive assembly, wherein the hinge assembly is arranged on a cabinet; the hinge assembly includes a plurality of hinge blocks movably connected in sequence, and the hinge block at one end of the hinge assembly is connected to the cabinet door; the drive assembly is arranged on the cabinet; the drive assembly is configured to drive the hinge assembly to move, so that at least part of the hinge block extends or retracts relative to the cabinet, and drives the cabinet door to open or close relative to the cabinet. The present application helps to improve the opening and closing angle of the cabinet door, solves the problem of the small opening and closing angle of the automatic door opening and closing in the related art, and thereby avoids the problem that when the opening and closing angle of the cabinet door is small, the overflowing water vapor gathers on the top of the cabinet, causing the cabinet to become damp, thereby maintaining the cleaning effect of the cabinet and improving the user experience.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a door opening and closing device and a dishwasher. Background Art

[0002] Nowadays, household dishwashers have gradually entered home kitchens. As equipment that automatically washes tableware and kitchen utensils such as bowls, chopsticks, plates, dishes, knives, forks, etc., dishwashers can use water and other cleaning liquids to repeatedly rinse the tableware and kitchen utensils to be cleaned, greatly facilitating people's lives.

[0003] Take a built-in dishwasher as an example. The dishwasher is usually installed in a cabinet. After the dishwasher finishes washing the dishes, it needs to open the door to dry them to prevent the water droplets left on the dishes from breeding bacteria and ensure the hygiene and dryness of the dishes. In the related art, the dishwasher generally has an automatic door opening and closing structure, which is realized by the automatic door opening and closing actuator to open and close the door body, thereby utilizing the temperature difference between the inside and outside to quickly drain the moisture on the dishes and improve the drying effect.

[0004] However, the opening and closing angle of the automatic door is small, and the overflowing water vapor directly gathers on the top of the cabinet, causing the cabinet to become damp. Summary of the invention

[0005] The present application provides a door opening and closing device and a dishwasher, so as to solve the technical problem that the opening and closing angle of the automatic door of the current dishwasher is small.

[0006] A first aspect of an embodiment of the present application provides a door opening and closing device, which is used for a dishwasher, and the dishwasher includes a cabinet and a cabinet door; the door opening and closing device includes a hinge assembly and a drive assembly; the hinge assembly is arranged on the cabinet; the hinge assembly includes a plurality of hinge blocks movably connected in sequence, and the hinge block located at one end of the hinge assembly is connected to the cabinet door; the drive assembly is arranged on the cabinet; the drive assembly is configured to drive the hinge assembly to move, so that at least part of the hinge block extends or retracts relative to the cabinet, and drives the cabinet door to open or close relative to the cabinet.

[0007] In some embodiments, when the hinge assembly drives the cabinet door to open relative to the cabinet body, the hinge blocks of the hinge assembly extending relative to the cabinet body are sequentially staggered along a first direction.

[0008] In some embodiments, the ends of two adjacent hinge blocks facing each other both have an inclined surface; when two adjacent hinge blocks are staggered along the first direction, the inclined surfaces of the two hinge blocks abut against each other.

[0009] In some embodiments, the hinge assembly further includes a plurality of connecting members, both ends of which are rotatably connected to two adjacent hinge blocks respectively; and the two adjacent hinge blocks are configured to move relative to each other through the connecting members.

[0010] In some embodiments, at least two connecting members are disposed between two adjacent hinge blocks, and at least two connecting members are respectively connected to opposite sides of the two adjacent hinge blocks.

[0011] In some embodiments, the connecting member includes a plurality of connecting segments, and the plurality of connecting segments are rotatably connected in sequence; adjacent connecting segments can be bent relative to each other so that two adjacent hinge blocks can rotate relative to each other and change the moving direction of the hinge assembly.

[0012] In some embodiments, the multiple connecting segments include a first connecting segment, a second connecting segment, a third connecting segment and a fourth connecting segment, and the connecting member also includes a first connecting axis, a second connecting axis and a third connecting axis, the first connecting segment is rotationally connected to one of the two adjacent hinge blocks, the second connecting segment is rotationally connected to the first connecting segment through the first connecting axis, the third connecting segment is rotationally connected to the second connecting segment through the second connecting axis, the fourth connecting segment is rotationally connected to the third connecting segment through the third connecting axis, and the fourth connecting segment is rotationally connected to the other of the two adjacent hinge blocks; when the two adjacent hinge blocks rotate relative to each other, the second connecting segment and the third connecting segment bend relative to each other.

[0013] In some embodiments, the connecting member is an elastic spring.

[0014] In some embodiments, the hinge assembly further includes an elastic member, both ends of which are respectively connected to two adjacent hinge blocks; when the two adjacent hinge blocks move relative to each other, the elastic member is configured to apply a reverse force to the two hinge blocks.

[0015] In some embodiments, the hinge block has an engaging portion, the driving assembly includes a driving unit and a gear, the driving unit is configured to drive the gear to rotate, and the gear is engaged with the engaging portion.

[0016] A second aspect of an embodiment of the present application provides a dishwasher, which includes a cabinet, a cabinet door and a door opening and closing device. The cabinet has a loading and unloading opening, the cabinet door is openably connected to the loading and unloading opening, and the door opening and closing device is located on the top side of the cabinet.

[0017] In some embodiments, the cabinet body includes an inner shell and a support member, wherein the support member is located at the top of the inner shell and extends along the top edge of the access port; the drive assembly of the door opening and closing device is connected to the support member, and at least part of the structure of the hinge assembly of the door opening and closing device extends along the length direction of the support member.

[0018] In some embodiments, a first guide member is connected to the support member, and the hinge assembly moves along the first guide member; the first guide member is configured to guide the hinge assembly to turn so that the hinge assembly moves from the length direction of the support member toward the cabinet door.

[0019] In some embodiments, a second guide member is connected to the support member, and the second guide member is located on the side of the hinge assembly away from the first guide member; the second guide member includes a plurality of roller portions, and the plurality of roller portions are arranged at intervals along the length direction of the support member.

[0020] In some embodiments, a limiting portion is provided at the top of the inner container, at least a portion of the structure of the hinge assembly extends along the top side of the inner container, and the limiting portion is disposed on both sides of the hinge assembly.

[0021] The embodiment of the present application provides a door opening and closing device and a dishwasher, wherein the door opening and closing device comprises a hinge assembly, and the hinge assembly comprises a plurality of hinge blocks that are movably connected in sequence. Thus, as the plurality of hinge blocks gradually slide out, it is beneficial to gradually increase the opening and closing angle of the dishwasher cabinet door, solving the problem of a small opening and closing angle of the automatic door opening and closing in the related art, thereby helping to avoid the problem of the cabinet being damp due to the overflowing water vapor gathering on the top of the cabinet when the opening and closing angle of the cabinet door is small, and maintaining the cleaning effect of the cabinet; the door opening and closing device also comprises a driving assembly, which can drive the hinge assembly to move, thereby realizing the opening or closing of the cabinet door relative to the cabinet body, with a high degree of automation, helping to save manpower, and improving user experience.

[0022] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the door opening and closing device and dishwasher provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A side view of a dishwasher provided by an embodiment of the present application;

[0025] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure of part I;

[0026] Figure 3 A top view of a dishwasher provided in an embodiment of the present application;

[0027] Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure of part II;

[0028] Figure 5 A schematic structural diagram of a support member of a dishwasher provided in an embodiment of the present application;

[0029] Figure 6 for Figure 5 A schematic diagram of the partially enlarged structure of Part III;

[0030] Figure 7 A schematic diagram of a structure in which two adjacent hinge blocks of a hinge assembly provided in an embodiment of the present application are in a lowered state Figure 1 ;

[0031] Figure 8 A schematic diagram of a structure in which two adjacent hinge blocks of a hinge assembly provided in an embodiment of the present application are in a lowered state Figure 2 ;

[0032] Fig. 9 A schematic diagram of a structure in which two adjacent hinge blocks of a hinge assembly provided in an embodiment of the present application are in a lowered state Figure 3 ;

[0033] Fig.10 A schematic diagram of a structure in which two adjacent hinge blocks of a hinge assembly provided in an embodiment of the present application are in a parallel state Figure 1 ;

[0034] Fig.11 A schematic diagram of a structure in which two adjacent hinge blocks of a hinge assembly provided in an embodiment of the present application are in a parallel state Figure 2 ;

[0035] Fig.12A schematic diagram of a structure in which two adjacent hinge blocks of a hinge assembly provided in an embodiment of the present application are in a parallel state Figure 3 ;

[0036] Fig.13 This is a schematic structural diagram of two adjacent hinge blocks of the hinge assembly provided in an embodiment of the present application in a bent state.

[0037] Description of reference numerals:

[0038] 100-door opening and closing device;

[0039] 110-hinge assembly; 111-hinge block; 1111-inclined surface;

[0040] 1112-engaging portion; 1113-fixing column; 1114-fixing rib;

[0041] 112-connecting piece; 1121-first connecting section; 1122-second connecting section;

[0042] 1123-third connecting section; 1124-fourth connecting section; 1125-first connecting axis;

[0043] 1126-second connecting shaft; 1127-third connecting shaft; 113-elastic member;

[0044] 114-door lock fixing buckle; 120-driving assembly; 121-driving unit;

[0045] 122-Gear;

[0046] 200-Dishwasher;

[0047] 210-cabinet body; 211-access opening; 212-inner container;

[0048] 213-support member; 2131-crossbeam; 2132-vertical beam;

[0049] 2133-installation positioning hole; 214-first guide member; 2141-horizontal guide section;

[0050] 2142-bending guide section; 215-second guide member; 2151-roller portion;

[0051] 216-chute; 217-limiting part; 2171-horizontal limiting section;

[0052] 2172-bending limit section; 220-cabinet door; 221-door lock buckle. DETAILED DESCRIPTION

[0053] The dishwasher uses high-pressure water jets to mechanically rinse the surface of tableware, and at the same time combines high-temperature water and detergent to decompose oil and residue on the surface of tableware, achieving the dual effects of cleaning and sterilization.

[0054] After the dishwasher finishes washing the tableware, it needs to dry the tableware to prevent the residual water droplets on the tableware from breeding bacteria and ensure the hygiene and dryness of the tableware. Existing dishwashers mainly rely on two steps to achieve drying: residual temperature drying and automatic door opening drying. First, after the washing is completed, the dishwasher will perform residual temperature drying, that is, using the high temperature of hot water when washing dishes to evaporate water vapor. At this time, the drying efficiency is the highest. Then, after the residual temperature is dried to a certain extent, the dishwasher will perform the automatic door opening step, using the temperature difference between the inside and outside and the principle of air flow to promote the evaporation of water vapor, quickly discharge the moisture in the inner tank, and achieve an efficient drying effect. Among them, when executing the automatic door opening step, if the opening angle of the dishwasher is small, when the dishwasher is opened to dry, the overflowing water vapor will directly gather on the top of the cabinet, causing the cabinet to become damp and deformed.

[0055] In the related art, the dishwasher has an automatic door opening structure. When the dishwasher finishes cleaning, the automatic door opening structure is activated to automatically open the door. Specifically, the automatic door opening structure generally has an actuator such as a push rod, and the door body is opened by extending the push rod and closed by retracting the push rod. However, most of the push rods in the related art are actuators located in the center of the door body, and the extension or retraction of the push rod moves in the horizontal direction. In this way, when the push rod is retracted into the inner tank, the push rod is easily limited by the space at the top of the inner tank. The length of the push rod is limited, resulting in the door body angle of the automatic opening and closing door being limited, and the opening and closing angle of the automatic opening and closing door is small. When the dishwasher is opened to dry, the overflowing water vapor will directly gather on the top of the cabinet, causing the cabinet to be damp and deformed, and the cleaning effect of the cabinet will be poor.

[0056] In view of the above technical problems, the embodiment of the present application provides a door opening and closing device and a dishwasher, wherein the door opening and closing device includes a hinge assembly, and the hinge assembly includes a plurality of hinge blocks that are movably connected in sequence. In this way, as the plurality of hinge blocks gradually slide out, it is beneficial to gradually increase the opening and closing angle of the dishwasher cabinet door, solving the problem of a small opening and closing angle of the automatic door opening and closing in the related art, thereby helping to avoid the problem of the cabinet being damp due to the overflowing water vapor gathering on the top of the cabinet when the opening and closing angle of the cabinet door is small, and maintaining the cleanliness of the cabinet; the door opening and closing device also includes a driving assembly, which can drive the hinge assembly to move, thereby realizing the opening or closing of the cabinet door relative to the cabinet body, with a high degree of automation, helping to save manpower, and improving user experience.

[0057] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0058] Reference Figures 1 to 4 As shown, the embodiment of the present application provides a dishwasher 200, and the type of the dishwasher 200 is not limited in this embodiment. For example, the dishwasher 200 can be a built-in dishwasher, for example, the dishwasher is usually installed in a cabinet, which is conducive to the rational use of kitchen space; for example, the dishwasher 200 can be a stand-alone dishwasher, which can be placed independently at any position in the kitchen; for example, the dishwasher 200 can also be a desktop dishwasher, which is compact and occupies little space. This embodiment does not limit this.

[0059] In the present application, refer to Figure 1 As shown, the dishwasher 200 includes a cabinet 210 and a cabinet door 220. The cabinet 210 has a take-in and take-out opening 211, and the cabinet door 220 is openably connected to the take-in and take-out opening 211. It can be understood that the take-in and take-out opening 211 is an opening on the cabinet 210, and a user can put in and take out tableware through the take-in and take-out opening 211. There is no limitation on the shape and size of the take-in and take-out opening 211, and it can be set according to actual needs.

[0060] In the present application, refer to Figure 1 and Figure 3 As shown, the cabinet 210 includes an inner tank 212, which is one of the core components of the dishwasher 200. The inner tank 212 is used to place tableware, wherein the material of the inner tank 212 is not limited. Exemplarily, the material of the inner tank 212 may be stainless steel, which can withstand high temperature water and detergent, and stainless steel has antibacterial properties and is easy to clean; or, the material of the inner tank 212 may be plastic, which has certain impact resistance and electrical insulation; or, the material of the inner tank 212 may be ceramic, which has the advantages of being smooth, slow to deteriorate, and corrosion-resistant, and can also increase the washing effect. This embodiment does not limit this.

[0061] In the embodiment of the present application, there is no limitation on the material of the cabinet door 220. For example, the cabinet door 220 may be made of tempered glass, which not only has high temperature resistance, high strength and good transparency, but also has a smooth surface, is easy to clean, can effectively resist oil stains and scratches, and keeps the kitchen clean. This embodiment does not limit this.

[0062] In the embodiment of the present application, there is no limitation on the connection method between the cabinet door 220 and the cabinet body 210. For example, the cabinet door 220 and the cabinet body 210 can be connected by rotation, for example, the cabinet door 220 can flip relative to the cabinet body 210 around the rotation axis; or the cabinet door 220 can move horizontally relative to the cabinet body 210 around the rotation axis; for example, the cabinet door 220 and the cabinet body 210 can also be connected by buckles and slots. This embodiment does not limit this.

[0063] In addition, in this embodiment, the connection position between the cabinet door 220 and the cabinet body 210 is not limited. Figure 1 As shown, the cabinet door 220 can be connected to the bottom of the cabinet body 210. In this way, through the bottom connection, the cabinet door 220 can be easily rotated from one position to another, which is more flexible and helps to improve the user experience.

[0064] In order to realize the opening or closing of the cabinet door 220 relative to the cabinet body 210, in the embodiment of the present application, reference is made to Figures 1 to 4 As shown, the dishwasher 200 further includes a door opening and closing device 100 .

[0065] It should be noted that there is no limitation on the installation position of the door opening and closing device 100. For example, the door opening and closing device 100 can be located on the top side of the cabinet 210; or, the door opening and closing device 100 can be located on the bottom side of the cabinet 210; or, the door opening and closing device 100 can also be located at other positions of the cabinet 210.

[0066] In this embodiment, refer to Figure 1 and Figure 3 As shown, the door opening and closing device 100 is mainly described by taking the case where it is located on the top side of the cabinet 210 as an example. This is helpful to avoid interference with the connection position between the cabinet door 220 and the bottom of the cabinet 210, thereby ensuring the normal opening or closing of the door opening and closing device 100 to the greatest extent and ensuring the normal operation of the dishwasher 200.

[0067] Continue to refer to Figure 3 and Figure 4As shown, the cabinet 210 may further include a support member 213, and the support member 213 is located at the top of the inner container 212. The support member 213 extends along the top edge of the access opening 211, the drive assembly 120 of the door opening and closing device 100 is connected to the support member 213, and at least part of the structure of the hinge assembly 110 of the door opening and closing device 100 extends along the length direction of the support member 213. Specifically, the drive assembly 120 of the door opening and closing device 100 is connected to the crossbeam 2131.

[0068] It should be noted that, in this embodiment, the support member 213 extends along the top edge of the access opening 211, which is beneficial to fully utilize the space of the top edge of the access opening 211 and avoid occupying the top space of the inner liner 212 to the greatest extent, thereby helping to avoid occupying the accommodation space of the inner liner 212; at the same time, the drive assembly 120 of the door opening and closing device 100 is connected to the support member 213, so that, on the one hand, the hinge assembly 110 can be extended or retracted along the length direction of the support member 213, thereby helping to avoid the problem of occupying the top space of the inner liner 212. On the other hand, the length of the support member 213 can be set according to actual needs, so that the length of the hinge assembly 110 can be set according to actual needs, thereby avoiding the problem of limited length of the hinge assembly 110 to the greatest extent, increasing the opening and closing angle of the cabinet door 220, and avoiding the problem that the overflowed water vapor gathers on the top of the cabinet and causes the cabinet to become damp when the opening and closing angle of the cabinet door 220 is small, thereby maintaining the cleaning effect of the cabinet; on the other hand, the present application can take into account different dishwasher 200 inner tank 212 structures, reduce the production cost of the dishwasher 200, and improve user experience.

[0069] In the embodiment of the present application, there is no limitation on the connection method between the driving assembly 120 and the supporting member 213. Figure 5 As shown, in this embodiment, a plurality of mounting positioning holes 2133 may be provided on the crossbeam 2131 of the support member 213. During installation, screws may be connected to the mounting positioning holes 2133 to directly fix the drive assembly 120 on the support member 213. This is not limited in this embodiment.

[0070] It should be noted that when the hinge assembly 110 is in the extended state, the hinge assembly 110 extends along the length direction of the support member 213. For example, the hinge assembly 110 can be sequentially extended along the length direction of the support member 213. Figure 4 The hinge assembly 110 moves toward the cabinet door 220 in the direction of arrow A1, arrow A2, and arrow A3. When the hinge assembly 110 is in the retracted state, for example, the hinge assembly 110 can move in the reverse direction in sequence, wherein the hinge block 111 connected to the cabinet door 220 can be retracted to be flush with the support member 213. This embodiment is not limited to this.

[0071] In the embodiment of the present application, the shape, material and size of the support member 213 are not limited and can be set according to actual needs. Figure 5 and Figure 6 As shown, the support member 213 may include a cross beam 2131 and a vertical beam 2132 connecting two sides of the cross beam 2131 , which helps to enhance the structural strength of the support member 213 and further ensure the installation stability of the door opening and closing device 100 .

[0072] In order to further ensure that the hinge assembly 110 moves along the preset trajectory, in the embodiment of the present application, refer to Figure 5 and Figure 6 As shown, the support member 213 may be connected to a first guide member 214, and the hinge assembly 110 moves along the first guide member 214. The first guide member 214 is configured to guide the hinge assembly 110 to turn so that the hinge assembly 110 moves from the length direction of the support member 213 toward the cabinet door 220.

[0073] In the embodiment of the present application, there is no limitation on the shape, type and material of the first guide member 214. Exemplarily, the first guide member 214 may be a guide plate; or, the first guide member 214 may be a guide rib. This is not limited in the present embodiment. In addition, there is no limitation on the connection method between the first guide member 214 and the support member 213. Exemplarily, the first guide member 214 and the support member 213 may be bonded; or, the first guide member 214 and the support member 213 may be welded; or, the first guide member 214 and the support member 213 may be an integral part, which is not limited in the present embodiment.

[0074] In the present application, refer to Figure 6 As shown, when the first guide member 214 guides the hinge assembly 110 to turn, the first guide member 214 may include a horizontal guide segment 2141 and a bending guide segment 2142, wherein the horizontal guide segment 2141 extends along the length direction of the support member 213, and the bending guide segment 2142 extends from the length direction of the support member 213 toward the cabinet door 220.

[0075] In this way, on the one hand, under the action of the first guide member 214, the hinge assembly 110 can be guided to move along the set trajectory; on the other hand, the bending guide section 2142 is in the shape of an arc segment, which is conducive to ensuring the stability and smoothness of the hinge assembly 110 during the steering process, improving the efficiency of the steering process, and ensuring the quality and safety of the steering.

[0076] In order to further ensure the smooth movement of the hinge assembly 110, in the embodiment of the present application, refer to Figure 5 and Figure 6As shown, the support member 213 may be connected to a second guide member 215, which is located on a side of the hinge assembly 110 away from the first guide member 214. The second guide member 215 may include a plurality of roller portions 2151, which are arranged at intervals along the length direction of the support member 213.

[0077] In the embodiment of the present application, there is no limitation on the number of the roller parts 2151, which can be set according to actual needs. In addition, there is no limitation on the arrangement of the plurality of roller parts 2151. For example, the roller part 2151 is a roller.

[0078] In the embodiment of the present application, the second guide member 215 is located on the side of the hinge assembly 110 away from the first guide member 214, so that a slide groove 216 is formed between the first guide member 214 and the second guide member 215 on the support member 213, and the hinge assembly 110 can move along the slide groove 216, thereby ensuring to the greatest extent that the hinge assembly 110 moves along the set trajectory.

[0079] In the embodiment of the present application, by including multiple roller portions 2151, the sliding friction between the hinge assembly 110 and the plane is converted into rolling friction between the hinge assembly 110 and the roller portion 2151, which helps to reduce the friction force of the hinge assembly 110 during movement, thereby improving the movement stability of the hinge assembly 110; at the same time, the design of the roller portion 2151 makes the contact area distribution more even, thereby avoiding local wear or overheating of the hinge assembly 110 and improving the durability and stability of the hinge assembly 110.

[0080] To further restrict the movement of the hinge assembly 110, refer to Figure 4 As shown, in the embodiment of the present application, a limiting portion 217 may be provided at the top of the inner liner 212, and the limiting portion 217 is provided on both sides of the hinge assembly 110. In this way, it helps to ensure that at least part of the structure of the hinge assembly 110 extends along the top side of the inner liner 212, thereby ensuring the movement of the hinge assembly 110.

[0081] In the embodiment of the present application, there is no limitation on the shape of the limiting portion 217. For example, the limiting portion 217 may be a limiting rib; or the limiting portion 217 may be a limiting plate. This embodiment does not limit this.

[0082] In the present application, refer to Figure 4As shown, when the limiting portion 217 guides the hinge assembly 110 to turn, the limiting portion 217 may include a horizontal limiting segment 2171 and a bending limiting segment 2172, wherein the horizontal limiting segment 2171 extends in the direction of the top of the inner liner 212, and the bending limiting segment 2172 extends from the top of the inner liner 212 toward the direction of the support member 213. In this way, the hinge assembly 110 can be guided to move along a set trajectory, and in addition, the bending limiting segment 2172 is in an arc segment shape, which is conducive to ensuring the stability and smoothness of the hinge assembly 110 during the turning process, improving the efficiency of the turning process, and ensuring the quality and safety of the turning process.

[0083] The specific structure of the door opening and closing device provided in the embodiment of the present application is described in detail below.

[0084] Reference Figure 4 As shown, an embodiment of the present application provides a door opening and closing device 100, which includes a hinge assembly 110, and the hinge assembly 110 includes a plurality of hinge blocks 111 movably connected in sequence, and the hinge block 111 located at one end of the hinge assembly 110 is connected to the cabinet door 220.

[0085] In the embodiment of the present application, the number of hinge blocks 111 is not limited, and can be set according to actual needs. It is understandable that the more the number of hinge blocks 111, the longer the length of the hinge assembly 110. In this way, compared with the related art, the present application is a chain-type automatic door opening structure. The hinge assembly 110 of the present application includes a plurality of hinge blocks 111. In the process of opening the cabinet door 220, as the hinge blocks 111 gradually slide out, the opening and closing angle of the cabinet door 220 can gradually increase, solving the problem of the small opening and closing angle of the automatic door opening and closing in the related art, and thus helping to avoid the problem that when the opening and closing angle of the cabinet door 220 is small, the overflowing water vapor gathers on the top of the cabinet and causes the cabinet to be damp, thereby maintaining the cleanliness of the cabinet.

[0086] In the embodiment of the present application, there is no limitation on the movable connection mode between adjacent hinge blocks 111. For example, adjacent hinge blocks 111 may be movably connected via hinged sheets, which is not limited in the present embodiment.

[0087] In the embodiment of the present application, the hinge block 111 at one end of the hinge assembly 110 is connected to the cabinet door 220, so that the hinge assembly 110 can ensure that the hinge assembly 110 is connected to the cabinet door 220 during the movement. It should be noted that in the related art, the door body has a door lock buckle, and the push rod has a door lock fixing buckle such as a card slot. The cabinet door 220 and the push rod are connected through the door lock buckle and the door lock fixing buckle. When the push rod is pushed to a certain value, the door body angle increases to a certain value, the door lock buckle and the door lock fixing buckle are separated, and the door body is in a suspended state.

[0088] It should be noted that in the implementation of this application, reference Figure 2 and Figure 4 As shown, the cabinet door 220 also has a door lock buckle 221 , and the hinge assembly 110 also has a door lock fixing buckle 114 such as a slot. The cabinet door 220 and the hinge assembly 110 are connected via the door lock buckle 221 and the door lock fixing buckle 114 .

[0089] Among them, one embodiment is: when the hinge assembly 110 is extended, the opening and closing angle of the cabinet door 220 increases, and because there is a pre-tightening force between the door lock buckle 221 and the door lock fixing buckle 114, the door lock buckle 221 and the door lock fixing buckle 114 remain in a plugged state, and the cabinet door 220 is connected to the hinge assembly 110; another implementation is: when the hinge assembly 110 is extended to a certain value, the opening and closing angle of the cabinet door 220 increases to a certain value, the door lock buckle 221 and the door lock fixing buckle 114 are separated, and the cabinet door 220 is in a suspended state at this time. This embodiment is not limited to this.

[0090] There is no limitation on the opening and closing angle of the cabinet door 220. For example, when the opening and closing angle of the cabinet door 220 is 30°, the door lock buckle 221 and the door lock fixing buckle 114 remain plugged in, and the cabinet door 220 is connected to the hinge assembly 110; when the opening and closing angle of the cabinet door 220 is any value greater than 30°, the door lock buckle 221 and the door lock fixing buckle 114 are disengaged, and the cabinet door 220 is in a suspended state. This embodiment does not limit this.

[0091] In order to ensure the smooth extension and retraction of the hinge assembly 110, in the embodiment of the present application, reference is made to Figure 4 As shown, the door opening and closing device 100 also includes a driving assembly 120, which drives the hinge assembly 110 to move so that at least part of the hinge block 111 extends or retracts relative to the cabinet body 210, and drives the cabinet door 220 to open or close relative to the cabinet body 210.

[0092] Exemplarily, when the driving assembly 120 is in forward motion, the hinge assembly 110 is driven to move, so that at least a portion of the hinge block 111 is extended relative to the cabinet 210, and the cabinet door 220 is driven to open relative to the cabinet 210. When the driving assembly 120 is in reverse motion, the hinge assembly 110 is driven to move, so that at least a portion of the hinge block 111 is retracted relative to the cabinet 210, and the cabinet door 220 is driven to close relative to the cabinet 210. This embodiment is not limited to this.

[0093] The working process of the door opening and closing device provided in the embodiment of the present application is as follows:

[0094] The dishwasher 200 executes the automatic door opening command, the driving assembly 120 rotates and drives the hinge assembly 110 to move, at least part of the hinge block 111 extends relative to the cabinet body 210 to push the cabinet door 220 to open, and in the process of opening the cabinet door 220, as the hinge block 111 gradually slides out, the opening and closing angle of the cabinet door 220 gradually increases. Exemplarily, when the opening and closing angle of the cabinet door 220 increases to a certain value, such as 30°, at this time, the cabinet door 220 can be controlled to continue opening or stop opening according to actual needs.

[0095] If it is necessary to stop opening the cabinet door 220, the dishwasher 200 executes an automatic door closing command, and the driving assembly 120 drives the hinge assembly 110 to move, so that at least part of the hinge block 111 is retracted relative to the cabinet body 210, and drives the cabinet door 220 to close relative to the cabinet body 210. It should be noted that in this embodiment, the door lock buckle 221 and the door lock fixing buckle 114 are plugged.

[0096] If it is necessary to further increase the opening and closing angle of the cabinet door 220, the driving assembly 120 continues to drive the hinge assembly 110 to move, the hinge block 111 continues to slide out, and the opening and closing angle of the cabinet door 220 continues to increase. When the opening and closing angle of the cabinet door 220 increases to a certain value, for example, an arbitrary value greater than 30°, the door lock buckle 221 and the door lock fixing buckle 114 are disengaged, the door opening action is completed, and the cabinet door 220 is in a suspended state. Subsequently, the driving assembly 120 drives the hinge assembly 110 to move so that at least part of the hinge block 111 is retracted relative to the cabinet body 210. At this time, the user can manually push the cabinet door 220 to plug the door lock buckle 221 and the door lock fixing buckle 114.

[0097] Therefore, the door opening and closing device provided in the embodiment of the present application can not only increase the opening and closing angle of the cabinet door, solving the problem of the small opening and closing angle of the automatic opening and closing door in the related technology, but also can realize small-angle or large-angle opening of the cabinet door according to actual needs. It has a wide range of applications and improves user experience.

[0098] In one possible implementation, referring to Figures 7 to 9 As shown, when the hinge assembly 110 drives the cabinet door 220 to open relative to the cabinet body 210, the hinge blocks 111 of the hinge assembly 110 extending relative to the cabinet body 210 are sequentially staggered along the first direction.

[0099] It should be noted that the first direction in this embodiment is a vertical direction. Figure 2 ,as well as Figures 7 to 9 As shown in the direction of arrow a.

[0100] In the embodiment of the present application, the hinge assembly 110 is staggered in sequence along the first direction relative to the hinge block 111 extending from the cabinet 210, which means: for example, referring to Figures 7 to 9As shown, as the hinge block 111 gradually slides out, the extended hinge block 111 descends in sequence along the first direction to form a stepped structure by utilizing the dead weight of the cabinet door 220. This is helpful in adapting to the opening of the cabinet door 220 and increasing the opening and closing angle of the cabinet door 220.

[0101] In one possible implementation, referring to Figure 8 As shown, one end of two adjacent hinge blocks 111 facing each other may have an inclined surface 1111. When two adjacent hinge blocks 111 are staggered along the first direction, the inclined surfaces 1111 of the two hinge blocks 111 abut against each other.

[0102] In this way, compared to the vertical plane, when the hinge block 111 of the present application is pushed out of the cabinet door 220 and extended, the relatively descending hinge blocks 111 can be stabilized by the posture of abutting in sequence, thereby ensuring to the greatest extent that the extended hinge blocks 111 descend in sequence along the first direction to form a stepped structure.

[0103] In the embodiment of the present application, there is no limitation on the inclination angle and inclination direction of the inclined surfaces 1111 of two adjacent hinge blocks 111 , and they can be set according to actual needs.

[0104] In this embodiment, the inclined direction and the inclined angle of the inclined surfaces 1111 of two adjacent hinge blocks are mainly used as an example for explanation. In this way, on the one hand, when the two adjacent hinge blocks 111 abut against each other, the abutting effect of the two adjacent inclined surfaces 1111 can be guaranteed to the greatest extent; on the other hand, the contact between the two inclined surfaces 1111 will be closer, which is beneficial to provide better support and stability; on the other hand, due to the consistency of the inclined angle, the hinge block 111 can move more smoothly, which helps to reduce the friction and resistance caused by the angle difference, thereby improving the working efficiency and performance of the overall hinge assembly 110.

[0105] In one possible implementation, referring to Figures 7 to 9 As shown, the hinge assembly 110 may further include a plurality of connecting members 112, both ends of which are rotatably connected to two adjacent hinge blocks 111 respectively; the two adjacent hinge blocks 111 are configured to move relative to each other through the connecting members 112. Exemplarily, the connecting member 112 in this embodiment may be a hinge sheet.

[0106] In the embodiment of the present application, the number of the connecting members 112 is not limited, and can be specifically set according to the number of the hinge blocks 111. For example, when the number of the hinge blocks 111 is three, the number of the connecting members 112 can be two, and the two connecting members 112 are rotatably connected between two adjacent hinge blocks 111 in a one-to-one correspondence. This embodiment does not limit this.

[0107] In the embodiment of the present application, there is no limitation on the rotational connection mode between the connecting member 112 and the hinge block 111. For example, the connecting member 112 and the hinge block 111 may be rotationally connected via a rotating shaft; or, the connecting member 112 and the hinge block 111 may be rotationally connected via a hinge. This embodiment does not limit this.

[0108] In the embodiment of the present application, two adjacent hinge blocks 111 are configured to move relative to each other through the connecting member 112. It should be noted that the two adjacent hinge blocks 111 may include the following three forms during the relative movement:

[0109] The first form is: refer to 7 to Fig. 9 As shown, as the hinge block 111 gradually slides out, the connection member 112 is inclined by utilizing the deadweight of the cabinet door 220 , and two adjacent hinge blocks 111 descend in sequence in the first direction to form a stepped structure.

[0110] The second form is: reference Figures 10 to 12 As shown, when the hinge block 111 moves in the slide groove 216 on the support member 213 along the length direction of the support member 213, the connecting member 112 is in a horizontal state, and two adjacent hinge blocks 111 remain parallel. The hinge block 111 is subjected to front, back, left, and right forces and moves forward and backward along the slide groove 216.

[0111] The third form is: reference Fig.13 As shown, when the hinge block 111 gradually extends, part of the hinge block 111 needs to turn to extend normally. During the turning process, the connecting member 112 will flip along with the movement process, and the connecting member 112 is in a bent state, and two adjacent hinge blocks 111 are in a bent state. That is, the hinge assembly 110 is in a bent state.

[0112] It should be noted that there is no limitation on the turning position and turning times of the partial hinge block 111. Figure 4 As shown, part of the hinge block 111 can turn along the extension direction of the support member 213. In this embodiment, the description is mainly based on the example that part of the hinge block 111 turns twice, the first turn is from the direction of arrow A1 to the direction of arrow A2, and the second turn is from the direction of arrow A2 to the direction of arrow A3. This embodiment is not limited to this.

[0113] In one possible implementation, referring to Fig. 9 and Fig.12 As shown, at least two connecting members 112 may be disposed between two adjacent hinge blocks 111 , and the at least two connecting members 112 are respectively connected to opposite sides of the two adjacent hinge blocks 111 .

[0114] In the embodiment of the present application, there is no limitation on the number of the connecting members 112. For example, two connecting members 112, three connecting members 112 or more connecting members 112 may be provided between two adjacent hinge blocks 111. Fig. 9 and Fig.12 As shown, the description is mainly made by taking an example that two connecting members 112 are provided between two adjacent hinge blocks 111 .

[0115] In the embodiment of the present application, there is no limitation on the specific structure of the connecting member 112. For example, the connecting member 112 may be a hinge piece such as an elastic spring, wherein the elastic spring, as an important accessory, can provide good elasticity and can withstand a large rotation force; in addition, the elasticity of the elastic spring can adjust the tightness of the connecting member 112, ensuring that the connecting member 112 will not loosen or deform after long-term use, thereby extending the service life of the connecting member 112.

[0116] In the embodiment of the present application, there is no limitation on the connection method between the connecting member 112 and the hinge block 111. Figures 7 to 13 As shown, the hinge block 111 may be provided with a fixing column 1113, which is used for the installation and matching of the connecting member 112 and the hinge block 111, thereby improving the connection strength between the connecting member 112 and the hinge block 111. It should be noted that the number of the fixing columns 1113, the shape of the fixing columns 1113, and the connection method between the fixing columns 1113 and the hinge block 111 are not limited, and can be specifically set according to actual needs.

[0117] Among them, refer to Fig. 9 and Fig.12 As shown, the two connecting members 112 are respectively connected to the opposite sides of two adjacent hinge blocks 111. This helps to enhance the connection strength of the two adjacent hinge blocks 111, maximize the connection stability of the two adjacent hinge blocks 111, and help avoid the risk of the connecting member 112 breaking when the steering angle is too large, thereby ensuring the normal operation of the hinge assembly 110.

[0118] In order to ensure the bending effect of the connecting member 112, in the embodiment of the present application, refer to Fig.13 As shown, the connecting member 112 may include a plurality of connecting segments, which are rotatably connected in sequence; adjacent connecting segments may be bent relative to each other so that two adjacent hinge blocks 111 can rotate relative to each other and change the moving direction of the hinge assembly 110 .

[0119] In the embodiment of the present application, there is no limitation on the number of connecting segments. For example, the number of connecting segments can be two, three or more. In the present embodiment, the example of the connecting member 112 including four connecting segments is mainly used for explanation. In the embodiment of the present application, there is no limitation on the bending angles at which adjacent connecting segments can be bent relative to each other, and the angles can be set according to actual needs. In the embodiment of the present application, the connecting segment can be an elastic spring leaf.

[0120] Specifically, in the embodiments of the present application, refer to Fig.13 As shown, the plurality of connecting segments may include a first connecting segment 1121 , a second connecting segment 1122 , a third connecting segment 1123 and a fourth connecting segment 1124 , and the connecting member 112 may further include a first connecting shaft 1125 , a second connecting shaft 1126 and a third connecting shaft 1127 .

[0121] Exemplarily, the first connecting shaft 1125 , the second connecting shaft 1126 , and the third connecting shaft 1127 may all be fixed shafts, which is not limited in this embodiment.

[0122] Among them, the first connecting section 1121 is rotationally connected to one of the two adjacent hinge blocks 111, the second connecting section 1122 is rotationally connected to the first connecting section 1121 through the first connecting shaft 1125, the third connecting section 1123 is rotationally connected to the second connecting section 1122 through the second connecting shaft 1126, the fourth connecting section 1124 is rotationally connected to the third connecting section 1123 through the third connecting shaft 1127, and the fourth connecting section 1124 is rotationally connected to the other of the two adjacent hinge blocks 111.

[0123] When two adjacent hinge blocks 111 rotate relative to each other, there is no limit on the number of bends of the multiple connecting segments. In addition, there is no limit on the bending angle and bending direction of the connecting segments, and the bending can be performed according to actual conditions.

[0124] Exemplarily, the number of bends of the connecting segment may be one. For example, only the first connecting segment 1121 may be bent; or only the second connecting segment 1122 may be bent; or only the third connecting segment 1123 may be bent; or only the fourth connecting segment 1124 may be bent. This embodiment does not limit this.

[0125] Exemplarily, the number of bends of the connecting segment may be two. For example, the first connecting segment 1121 and the second connecting segment 1122 may be bent at the same time; or, the second connecting segment 1122 and the third connecting segment 1123 may be bent at the same time; or, the third connecting segment 1123 and the fourth connecting segment 1124 may be bent at the same time; or, the first connecting segment 1121 and the fourth connecting segment 1124 may be bent at the same time. This embodiment does not limit this.

[0126] Exemplarily, the number of bends of the connecting segment may be three. For example, the first connecting segment 1121, the second connecting segment 1122, and the third connecting segment 1123 may be bent at the same time; or, the first connecting segment 1121, the second connecting segment 1122, and the fourth connecting segment 1124 may be bent at the same time; or, the second connecting segment 1122, the third connecting segment 1123, and the fourth connecting segment 1124 may be bent at the same time. This embodiment does not limit this.

[0127] Exemplarily, the number of bends of the connecting segment may be three, for example, the first connecting segment 1121, the second connecting segment 1122, the third connecting segment 1123 and the fourth connecting segment 1124 may be bent at the same time. This embodiment does not limit this.

[0128] In the present application, refer to Fig.13 As shown, the description is mainly based on an example in which the second connecting section 1122 and the third connecting section 1123 are relatively bent when two adjacent hinge blocks 111 rotate relative to each other. In this way, on the one hand, the first connecting segment 1121 and the fourth connecting segment 1124 are not bent, which helps to ensure the connection strength and stability between the first connecting segment 1121 and one of the hinge blocks 111, and between the fourth connecting segment 1124 and the other hinge block 111, and avoids the risk of shaking between two adjacent hinge blocks 111, thereby ensuring the normal operation of the hinge assembly 110; on the other hand, it also helps to ensure the connection stability between the first connecting segment 1121 and the second connecting segment 1122, and between the third connecting segment 1123 and the fourth connecting segment 1124; on another hand, since the second connecting segment 1122 and the third connecting segment 1123 are located between two adjacent hinge blocks 111, the second connecting segment 1122 and the third connecting segment 1123 are limited to bend relative to each other, so that the two adjacent hinge blocks 111 can rotate relative to each other and change the moving direction of the hinge assembly 110.

[0129] In one possible implementation, referring to Figures 7 to 13 As shown, the hinge assembly 110 may further include an elastic member 113, and the two ends of the elastic member 113 are respectively connected to two adjacent hinge blocks 111. In this way, when the two adjacent hinge blocks 111 move relative to each other, the elastic member 113 gradually deforms as the position of the hinge block 111 changes, and can provide a reverse buffering force to the hinge block 111, thereby effectively avoiding the problem of a sense of frustration during the step change of the hinge block 111 during the opening and closing process of the cabinet door 220, and ensuring the stable movement of the hinge assembly 110.

[0130] In the embodiment of the present application, the number of the elastic members 113 is not limited, and can be specifically set according to the number of the hinge blocks 111. In addition, the specific structure of the elastic member 113 is not limited, and illustratively, the elastic member 113 can be an elastic spring leaf.

[0131] In the embodiment of the present application, there is no limitation on the connection method between the elastic member 113 and the hinge block 111. Fig. 9 and Fig.12 As shown, the hinge block 111 may be provided with fixing ribs 1114, which are used for the installation and matching of the elastic member 113 and the hinge block 111, so as to improve the connection strength between the elastic member 113 and the hinge block 111. This embodiment does not limit this.

[0132] It should be noted that there is no limitation on the number of the fixing ribs 1114 , the shape of the fixing ribs 1114 , and the connection method between the fixing ribs 1114 and the hinge block 111 , and they can be specifically configured according to actual needs.

[0133] In one possible implementation, referring to Figure 4 , Fig. 9 and Fig.12 As shown, the hinge block 111 may have a meshing portion 1112, and the driving assembly 120 includes a driving unit 121 and a gear 122. The driving unit 121 is configured to drive the gear 122 to rotate, and the gear 122 meshes with the meshing portion 1112. Exemplarily, the meshing portion 1112 may be a sliding tooth.

[0134] In the embodiment of the present application, there is no limitation on the structure of the driving unit 121. For example, the driving unit 121 can be a conventional motor, the motor rotates to drive the gear 122 to rotate, the gear 122 is engaged with the meshing portion 1112, and the transmission of the gear 122 can drive the hinge assembly 110 to rotate forward and backward, thereby realizing the extension or retraction of the hinge assembly 110.

[0135] The embodiment of the present application provides a door opening and closing device and a dishwasher, wherein the door opening and closing device comprises a hinge assembly, and the hinge assembly comprises a plurality of hinge blocks that are movably connected in sequence. Thus, as the plurality of hinge blocks gradually slide out, it is beneficial to gradually increase the opening and closing angle of the dishwasher cabinet door, solving the problem of a small opening and closing angle of the automatic door opening and closing in the related art, thereby helping to avoid the problem of the cabinet being damp due to the overflowing water vapor gathering on the top of the cabinet when the opening and closing angle of the cabinet door is small, and maintaining the cleanliness of the cabinet; the door opening and closing device comprises a driving assembly, and the driving assembly can drive the hinge assembly to move, thereby realizing the opening or closing of the cabinet door relative to the cabinet body, with a high degree of automation, helping to save manpower and improving user experience.

[0136] It should be noted that, in the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0137] In the description of the embodiments of the present application, the term "and / or" merely indicates an association relationship that describes associated objects, indicating that three relationships may exist. For example, A and / or B may indicate the following three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" indicates any combination of at least two of any one or more of a plurality of. For example, at least one of A, B, and C may indicate any one or more elements selected from a set that includes A, B, and C.

[0138] In the description of the embodiments of the present application, the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the term "plurality" means two or more, unless otherwise precisely and specifically specified.

[0139] In the description of the embodiment of the present application, the terms "first", "second", "third", "fourth", etc. (if present) are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A door opening and closing device, characterized in that: The door opening and closing device is used for a dishwasher, and the dishwasher comprises a cabinet body and a cabinet door; the door opening and closing device comprises: A hinge assembly (110), the hinge assembly (110) being arranged on the cabinet body (210); the hinge assembly (110) comprising a plurality of hinge blocks (111) movably connected in sequence, the hinge block (111) located at one end of the hinge assembly (110) being connected to the cabinet door (220); A driving assembly (120), wherein the driving assembly (120) is disposed on the cabinet body (210); the driving assembly (120) is configured to drive the hinge assembly (110) to move, so that at least a portion of the hinge block (111) extends or retracts relative to the cabinet body (210), and drives the cabinet door (220) to open or close relative to the cabinet body (210).

2. The door opening and closing device according to claim 1, characterized in that: When the hinge assembly (110) drives the cabinet door (220) to open relative to the cabinet body (210), the hinge blocks (111) of the hinge assembly (110) extending from the cabinet body (210) are sequentially staggered along a first direction.

3. The door opening and closing device according to claim 2, characterized in that: The ends of two adjacent hinge blocks (111) facing each other both have an inclined surface (1111); when the two adjacent hinge blocks (111) are staggered along the first direction, the inclined surfaces (1111) of the two hinge blocks (111) abut against each other.

4. The door opening and closing device according to claim 1, characterized in that: The hinge assembly (110) further comprises a plurality of connecting members (112), the two ends of each of which are rotatably connected to two adjacent hinge blocks (111) respectively; and the two adjacent hinge blocks (111) are configured to move relative to each other via the connecting members (112).

5. The door opening and closing device according to claim 4, characterized in that: At least two connecting members (112) are provided between two adjacent hinge blocks (111), and the at least two connecting members (112) are respectively connected to opposite sides of the two adjacent hinge blocks (111).

6. The door opening and closing device according to claim 4, characterized in that: The connecting member (112) comprises a plurality of connecting segments, and the plurality of connecting segments are rotatably connected in sequence; adjacent connecting segments can be relatively bent to allow two adjacent hinge blocks (111) to relatively rotate and change the moving direction of the hinge assembly (110).

7. The door opening and closing device according to claim 6, characterized in that: The multiple connecting sections include a first connecting section (1121), a second connecting section (1122), a third connecting section (1123) and a fourth connecting section (1124); the connecting member (112) further includes a first connecting shaft (1125), a second connecting shaft (1126) and a third connecting shaft (1127); the first connecting section (1121) is rotationally connected to one of the two adjacent hinge blocks (111); the second connecting section (1122) is rotationally connected to the first connecting section (1121) via the first connecting shaft (1125); the third connecting section (1123) is rotationally connected to the second connecting section (1122) via the second connecting shaft (1126); the fourth connecting section (1124) is rotationally connected to the third connecting section (1123) via the third connecting shaft (1127); and the fourth connecting section (1124) is rotationally connected to the other of the two adjacent hinge blocks (111); When two adjacent hinge blocks (111) rotate relative to each other, the second connecting section (1122) and the third connecting section (1123) bend relative to each other.

8. The door opening and closing device according to claim 4, characterized in that: The connecting piece (112) is an elastic spring.

9. The door opening and closing device according to any one of claims 1 to 8, characterized in that: The hinge assembly (110) further comprises an elastic member (113), the two ends of which are respectively connected to two adjacent hinge blocks (111); when the two adjacent hinge blocks (111) move relative to each other in a dislocated manner, the elastic member (113) is configured to apply a reverse force to the two hinge blocks (111).

10. The door opening and closing device according to any one of claims 1 to 8, characterized in that: The hinge block (111) has a meshing portion (1112), and the driving assembly (120) comprises a driving unit (121) and a gear (122), wherein the driving unit (121) is configured to drive the gear (122) to rotate, and the gear (122) meshes with the meshing portion (1112).

11. A dishwasher, characterized in that: The dishwasher comprises a cabinet body, a cabinet door, and a door opening and closing device according to any one of claims 1 to 10, wherein the cabinet body (210) has a take-in and take-out opening (211), the cabinet door (220) is connected to the take-in and take-out opening (211) in an openable and closable manner, and the door opening and closing device is located on the top side of the cabinet body (210).

12. The dishwasher according to claim 11, characterized in that The cabinet (210) comprises an inner container (212) and a support member (213); the support member (213) is located at the top of the inner container (212), and the support member (213) extends along the top side edge of the access opening (211); the drive assembly (120) of the door opening and closing device is connected to the support member (213), and at least part of the structure of the hinge assembly (110) of the door opening and closing device extends along the length direction of the support member (213).

13. The dishwasher according to claim 12, characterized in that The support member (213) is connected to a first guide member (214), and the hinge assembly (110) moves along the first guide member (214); the first guide member (214) is configured to guide the hinge assembly (110) to turn so that the hinge assembly (110) moves from the length direction of the support member (213) toward the cabinet door (220).

14. The dishwasher according to claim 13, characterized in that The support member (213) is connected to a second guide member (215), and the second guide member (215) is located on a side of the hinge assembly (110) away from the first guide member (214); the second guide member (215) includes a plurality of roller portions (2151), and the plurality of roller portions (2151) are arranged at intervals along the length direction of the support member (213).

15. The dishwasher according to claim 12, characterized in that A limiting portion (217) is provided at the top of the inner liner (212), at least a portion of the structure of the hinge assembly (110) extends along the top side of the inner liner (212), and the limiting portion (217) is disposed on both sides of the hinge assembly (110).

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