Inner tub of a dishwasher and dishwasher

Abstract

The utility model discloses a kind of inner container of dishwasher and dishwasher, the inner container of dishwasher includes: inner container body, define the washing cavity of one side open;Polyurea material piece, set in the outside surface of inner container body.According to the inner container of dishwasher of the utility model, by setting polyurea material piece in the outside surface of inner container body, polyurea material piece not only can absorb vibration and weaken noise, but also can make inner container body can resist external knock, friction, isolate corrosive medium, avoid inner container body oxidation rust, and polyurea material piece is non-toxic and no harmful substance release, can avoid health hidden danger, to comprehensively improve the noise reduction, anticorrosive, heat preservation, automation and health protection performance of inner container body.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a dishwasher inner tank and a dishwasher. Background Technology

[0002] Health, noise, and energy efficiency are key concerns for dishwasher users. The main source of noise in dishwashers is the impact of water spray from the spray arms on the inner tank wall and base plate. The thin metal plates of the inner tank wall and base plate, due to their thinness and large radiation area, are the primary noise sources. While low-cost asphalt damping materials are widely used in dishwashers, they have significant drawbacks: as a Group 1 carcinogen, asphalt damping materials easily produce unpleasant odors at high temperatures, posing a significant health hazard and making them unsuitable for appliances that come into direct or indirect contact with food; furthermore, asphalt has poor thermal insulation properties, failing to meet the increasingly demanding energy efficiency requirements of dishwashers. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes an inner liner for a dishwasher, wherein the inner liner comprehensively improves the vibration reduction, noise reduction, heat preservation, and safety protection performance of the inner liner body by using polyurea material components.

[0004] This utility model also proposes a dishwasher with a dishwasher inner liner.

[0005] The dishwasher inner tub according to a first aspect of the present invention includes: an inner tub body defining a washing cavity open on one side; and a polyurea material component disposed on the outer surface of the inner tub body.

[0006] According to the dishwasher inner liner of this utility model, by setting polyurea material components on the outer surface of the inner liner body, the polyurea material components can not only absorb vibration and reduce noise, but also enable the inner liner body to resist external bumps and friction, isolate corrosive media, and prevent oxidation and rust of the inner liner body. Moreover, the polyurea material components are non-toxic and do not release harmful substances, thus avoiding health hazards, thereby comprehensively improving the noise reduction, corrosion prevention, heat preservation, automation and health protection performance of the inner liner body.

[0007] In some embodiments, the polyurea material is formed onto the inner liner body by spraying; and / or, the polyurea material is a foamed material.

[0008] In some embodiments, the thickness of the polyurea material part is 0.1 mm to 20 mm.

[0009] In some embodiments, the thickness of the polyurea material part is 2mm-5mm.

[0010] In some embodiments, the thermal conductivity of the polyurea material is 18 mW / m·K to 24 mW / m·K.

[0011] In some embodiments, the polyurea material includes a flexible polyurea layer and a rigid polyurea layer stacked in the thickness direction, the flexible polyurea layer being disposed between the rigid polyurea layer and the outer surface of the inner liner body, and the elastic modulus of the flexible polyurea layer being less than that of the rigid polyurea layer.

[0012] In some embodiments, the thickness of the flexible polyurea layer is 0.1 mm to 2 mm, and / or the thickness of the rigid polyurea layer is 1 mm to 5 mm.

[0013] A dishwasher according to a second aspect of the present invention includes: a housing; an inner liner of a dishwasher according to a first aspect of the present invention, the inner liner being disposed within the housing; and a door assembly that can be opened to cover the open side of the inner liner.

[0014] According to the dishwasher of this utility model, by setting polyurea material components on the outer surface of the inner tank body, the polyurea material components can not only absorb vibration and reduce noise, but also enable the inner tank body to resist external bumps and friction, isolate corrosive media, and prevent the inner tank body from oxidation and rust. Moreover, the polyurea material components are non-toxic and do not release harmful substances, thus avoiding health hazards. Therefore, the noise reduction, corrosion prevention, heat preservation, automation and health protection performance of the inner tank body are comprehensively improved.

[0015] In some embodiments, a gap exists between the polyurea material component disposed on the inner liner body and the outer shell.

[0016] In some embodiments, the door assembly includes an inner door disposed toward the washing chamber, the side of the inner door facing away from the washing chamber being covered with the polyurea material.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the inner tub of a dishwasher according to an embodiment of the present utility model; Figure 2 yes Figure 1 The front view of the dishwasher's inner drum shown; Figure 3 yes Figure 1 Left view of the dishwasher's inner drum shown; Figure 4 yes Figure 1 A top view of the dishwasher's inner drum shown; Figure 5 yes Figure 1The image shows a partial structural cross-sectional view of the inner drum of the dishwasher.

[0019] Figure label: 100. Inner liner; 10. Inner tank body; 11. Washing chamber; 20. Polyurea material component; 21. Flexible polyurea layer; 22. Rigid polyurea layer. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0021] The following is for reference. Figures 1-5 The inner liner 100 of a dishwasher according to a first aspect of the present invention is described.

[0022] like Figures 1-5 As shown, the inner liner 100 of the dishwasher according to the first aspect of the present invention includes: an inner liner body 10 and a polyurea material component 20.

[0023] Specifically, the inner tank body 10 defines a washing chamber 11 open on one side; the polyurea material component 20 is disposed on the outer surface of the inner tank body 10.

[0024] like Figure 1 As shown, the inner liner body 10 can be rectangular or cubic in shape. An independent washing chamber 11 is defined inside the inner liner body 10. The front of the inner liner body 10 is open, allowing dishes to be directly placed into the washing chamber 11 from the open side, reducing the difficulty of placing the dishes. By defining an independent washing chamber 11 inside the inner liner body 10, a dedicated washing space can be provided for the dishes, reducing external interference with the washing process. It also concentrates water flow, detergent, and other washing resources, improving the efficiency of dishwashing.

[0025] Polyurea material component 20 is typically generated from isocyanate and amino compound components through a chemical reaction, and is a polymer material with excellent elastic properties. Polyurea material component 20 can be tightly adhered to and wrapped around the outer surface of the inner liner body 10. For example, polyurea material component 20 can be uniformly coated onto the outer surface of the inner liner body 10 using a spraying process to form a complete protective layer; alternatively, a pre-fabricated polyurea sheet adapted to the outer surface of the inner liner body 10 can be bonded to the outside of the inner liner body 10 using an adhesive; or polyurea raw material can be injected into a pre-designed custom mold cavity on the outer side of the inner liner body 10, and after curing, it forms an integral structure with the surface of the inner liner body 10.

[0026] In this embodiment, by wrapping the outer surface of the inner liner body 10 with a polyurea material component 20, the high elasticity and density of the polyurea material component 20 can form a physical barrier between the inner liner body 10 and the external environment, reducing direct damage to the inner liner body 10 from external impacts and friction, and extending the service life of the inner liner body 10. As an elastic damping material, the polyurea material component 20, when tightly wrapped around the inner liner body 10, forms a complete elastic damping layer. When the dishwasher vibrates, its unique viscoelastic properties convert the vibration kinetic energy into heat energy and dissipate it, thereby reducing the vibration amplitude of the inner liner body 10, achieving a noise reduction effect, and improving the user experience. Utilizing the chemical stability of the polyurea material component 20, it can prevent moisture, oxygen, and other corrosive media such as acidic and alkaline solutions and oil stains from contacting the inner liner body 10, avoiding structural damage to the surface of the inner liner body 10 due to oxidation and corrosion. The closed-cell structure and low thermal conductivity of the polyurea material component 20 create an insulation layer on the outside of the inner liner 10, reducing natural heat loss from the washing chamber 11 and preventing external temperature fluctuations from affecting the temperature inside the washing chamber 11. This reduces energy consumption and improves the dishwasher's energy efficiency rating. By utilizing the one-time molding, rapid curing, and no-baking characteristics of the polyurea material component 20, production efficiency can be significantly improved, saving energy and labor costs, enabling efficient, large-scale, and automated production. The polyurea material component 20 itself is non-toxic and releases no volatile harmful substances, forming a physical barrier to ensure the safety of the dishes after cleaning, meeting the requirements for healthy use.

[0027] According to the first aspect of the present invention, the inner liner 100 of the dishwasher, by disposing of a polyurea material component 20 on the outer surface of the inner liner body 10, can not only absorb vibration and reduce noise, but also enable the inner liner body 10 to resist external impacts and friction, isolate corrosive media, and prevent oxidation and rust of the inner liner body 10. Moreover, the polyurea material component 20 is non-toxic and does not release harmful substances, thus avoiding health hazards, thereby comprehensively improving the noise reduction, corrosion prevention, heat preservation, automation and health protection performance of the inner liner body 10.

[0028] In some embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the polyurea material part 20 can be spray-formed onto the inner liner body 10; and / or, the polyurea material part 20 can be a foamed material part.

[0029] In some examples, the polyurea material component 20 can be uniformly sprayed onto the outer surface of the inner liner body 10 using a high-pressure spraying equipment mixing gun to form a complete protective layer. The coating thickness can be flexibly adjusted to adapt to the protection needs of different areas and prevent local damage. The polyurea material component 20 does not contain catalysts and can be cured quickly. It can be sprayed and formed on any curved, inclined and vertical surface without dripping. It is cured into a seamless and crack-free coating with excellent durability and weather resistance. At the same time, it is easy to process and reduces operational technical errors.

[0030] In some examples, the polyurea material component 20 is a foamed material component. By using the foamed polyurea material component 20, the rich closed-cell structure inside the foamed polyurea material component 20 can be used to further improve the heat insulation performance of the inner liner body 10, reduce heating energy consumption, and improve energy utilization efficiency. The lighter texture of the foamed polyurea material component 20 can ensure the protective effect of the inner liner body 10 while avoiding increasing the overall weight of the inner liner body 10, thus reducing the load on the dishwasher body. The good buffering and energy absorption characteristics of the foamed polyurea material component 20 can also provide better impact protection for the inner liner body 10, reducing deformation or damage to the inner liner body 10 caused by bumps and collisions.

[0031] In some embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the thickness of the polyurea material component 20 can range from 0.1mm to 20mm. When the polyurea material component 20 is used in the inner tank 100 of a dishwasher, the thickness of the sprayed polyurea material component 20 can be flexibly adjusted within the range of 0.1mm to 20mm. For example, the thickness of the polyurea material component 20 can be 0.1mm, 0.5mm, 1mm, 2mm, 4mm, 7mm, 10mm, 13mm, 15mm, 18mm, 20mm, etc. By ensuring that the thickness of the sprayed polyurea material component 20 is greater than or equal to 0.1 mm, sufficient structural integrity can be ensured, guaranteeing that the sprayed polyurea material component 20 achieves basic vibration reduction and noise reduction functions, and ensuring the protective performance of the sprayed polyurea material component 20 on the inner tank body 10. By ensuring that the thickness of the sprayed polyurea material component 20 is less than or equal to 20 mm, the weight of the inner tank body 10 can be reduced, which helps to reduce the transportation, installation costs and operating energy consumption of the dishwasher, adapting to the requirements of lightweighting. At the same time, the amount of polyurea material component 20 used can be controlled, reducing cost investment and improving the economy of the dishwasher.

[0032] In some embodiments of this utility model, such as Figure 1 and Figure 5As shown, the thickness of the polyurea material component 20 can be 2mm-5mm. For example, the thickness of the polyurea material component 20 can be 2mm, 2.1mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc. Further, the preferred thickness of the polyurea material component 20 is 2mm-5mm. This not only creates a suitable protective layer on the outside of the inner liner body 10, ensuring sufficient impact and corrosion resistance, but also effectively controls the amount of material used in the polyurea material component 20 to reduce costs and the overall weight of the inner liner 100. While maintaining good flexibility, it also possesses a certain structural strength, improving the versatility and practicality of the polyurea material component 20.

[0033] In some embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the thermal conductivity of the polyurea material component 20 can be between 18 mW / m·K and 24 mW / m·K. For example, the thermal conductivity of the polyurea material component 20 can be 18 mW / m·K, 22 mW / m·K, 24 mW / m·K, etc. The relatively low thermal conductivity of the polyurea material component 20, within the range of 18 mW / m·K to 24 mW / m·K, can form a heat insulation barrier on the outside of the inner tank body 10, reducing the heat loss from the hot water in the washing chamber 11 to the external environment. This allows the washing chamber 11 to maintain the set washing temperature for a longer period, avoiding frequent starts of the heating system due to rapid temperature drops, thereby reducing the overall energy consumption of the dishwasher.

[0034] In some embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the polyurea material component 20 may include a flexible polyurea layer 21 and a rigid polyurea layer 22 stacked in the thickness direction. The flexible polyurea layer 21 is disposed between the rigid polyurea layer 22 and the outer surface of the inner liner body 10, and the elastic modulus of the flexible polyurea layer 21 is smaller than that of the rigid polyurea layer 22. The molecular structure of the polyurea material component 20 contains block copolymers with both soft and hard segment phase regions. By controlling the ratio of soft to hard segments, materials that meet the differentiated requirements of the flexible polyurea layer 21 and the rigid polyurea layer 22 can be precisely manufactured. For example, increasing the proportion of soft segments can reduce the elastic modulus of the material, giving the flexible polyurea layer 21 excellent flexibility and damping properties to fit the inner liner body 10 and buffer vibrations; increasing the proportion of hard segments can improve the rigidity and strength of the material, giving the rigid polyurea layer 22 stronger impact resistance and wear resistance. The flexible polyurea layer 21 is directly sprayed onto the surface of the inner liner body 10, and the rigid polyurea layer 22 is sprayed onto the flexible polyurea layer 21. After the flexible polyurea layer 21 is sprayed during the construction process, the rigid polyurea layer 22 is sprayed immediately, and the operation can be carried out continuously without interruption.

[0035] In this embodiment, by directly spraying the flexible polyurea layer 21 onto the surface of the inner liner body 10, the lower elastic modulus of the flexible polyurea layer 21 can better adapt to the minute deformations of the inner liner body 10 surface, tightly adhering to the outer surface of the inner liner body 10 to eliminate gaps. Simultaneously, the characteristics of the flexible elastic nano-polyurea material coating 20 provide damping, vibration reduction, and noise reduction, buffering vibration energy and reducing the transmission of vibration to the outside. By stacking a rigid polyurea layer 22 on the outside of the flexible polyurea layer 21, the higher elastic modulus of the rigid polyurea layer 22 can provide supporting strength for the overall protective structure. This further enhances the vibration reduction and noise reduction effect and also provides overall reinforcement to the inner liner body 10, resisting external impacts such as bumps and friction, forming a dual protection system. By controlling the ratio of soft segment phase regions to hard segment phase regions in the molecular structure of polyurea material component 20, the mechanical properties of flexible polyurea layer 21 and rigid polyurea layer 22 can be adjusted. This allows flexible polyurea layer 21 to maintain excellent elasticity and damping properties to adapt to the deformation of inner liner body 10 and absorb vibration, while rigid polyurea layer 22 can have sufficient hardness and impact resistance to resist external damage. At the same time, it can achieve the sound insulation effect of damping, vibration reduction and noise reduction and the overall strength of inner liner body 10, while also thinning the material of inner liner body 10 and reducing material costs.

[0036] In some embodiments of this utility model, such as Figure 5 As shown, the thickness of the flexible polyurea layer 21 can be 0.1mm-2mm, and / or the thickness of the rigid polyurea layer 22 can be 1mm-5mm.

[0037] In some examples, the thickness of the flexible polyurea layer 21 is controlled between 0.1mm and 2mm. For example, the thickness of the flexible polyurea layer 21 can be 0.1mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, etc. A thickness of 0.1mm or greater for the flexible polyurea layer 21 avoids breakage and loss of cushioning performance due to excessive thinness, fully utilizing its cushioning effect to absorb small vibrations generated during dishwasher operation. Simultaneously, it ensures the flexible polyurea layer 21 possesses flexibility and deformation capacity, allowing it to tightly adhere to the subtle irregularities on the surface of the inner liner body 10, forming a seamless wrapping layer. Conversely, a thickness of 2mm or less for the sprayed flexible polyurea layer 21 avoids excessive deformation due to excessive thickness, preventing excessive space occupation, reducing material usage, and lowering material costs.

[0038] In some examples, the thickness of the rigid polyurea layer 22 is set to 1mm-5mm. For example, the thickness of the rigid polyurea layer 22 can be 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, etc. A thickness of 1mm or more for the rigid polyurea layer 22 ensures the basic structural strength of the rigid polyurea layer 22, guaranteeing sufficient structural strength to withstand external impacts and prevent damage to the inner liner body 10. A thickness of 5mm or less for the rigid polyurea layer 22 avoids excessive rigidity of the overall protective layer due to excessive thickness, thus preventing a loss of buffering capacity. This creates a composite structure with the flexible polyurea layer 21 with a reasonable thickness ratio, avoiding material waste and achieving cost reduction and efficiency improvement.

[0039] In this embodiment, the combination of flexible polyurea layer 21 and rigid polyurea layer 22 allows the flexible polyurea layer 21 to fully exert its bonding and vibration reduction effects, providing a sound insulation effect of damping, vibration reduction, and noise reduction. At the same time, the rigid polyurea layer 22 can strengthen the overall strength of the inner liner body 10, effectively providing the main function of damage protection, reducing the amount of polyurea material used in the polyurea material component 20, and achieving lightweight and low cost.

[0040] The following is for reference. Figures 1-5 A dishwasher according to a second aspect of the present invention is described.

[0041] like Figures 1-5 As shown, a dishwasher according to a second aspect of the present invention includes: a housing, an inner liner 100 according to a first aspect of the present invention, and a door assembly.

[0042] Specifically, the inner liner 100 is arranged inside the outer shell; the door assembly is detachably sealed on the open side of the inner liner 100.

[0043] The outer shell can be rectangular or cubic, and the inner liner 100 is arranged inside the outer shell. The outer shell provides external support and physical protection for the inner liner 100, which can prevent the inner liner 100 from being directly exposed to the outside and suffering from collisions and scratches.

[0044] The door assembly is shaped to fit the open side of the inner tub body 10, and can be opened to seal the open side of the inner tub body 10. The door assembly and the inner tub body 10 work together to seal the washing chamber 11. The sealing structure of the door assembly fits tightly against the edge of the inner tub body 10, preventing airflow exchange between the washing chamber 11 and the outside environment during dishwasher operation. Combined with the polyurea material component 20 for heat insulation and protection of the inner tub body 10, heat loss within the washing chamber 11 is reduced, maintaining a stable washing temperature. At the same time, the openable design of the door assembly facilitates the user's loading and unloading of dishes, ensuring the dishwasher's ease of use.

[0045] According to the dishwasher of this utility model embodiment, by disposing of the polyurea material component 20 on the outer surface of the inner liner body 10, the polyurea material component 20 can not only absorb vibration and reduce noise, but also enable the inner liner body 10 to resist external bumps and friction, isolate corrosive media, and prevent oxidation and rust of the inner liner body 10. Moreover, the polyurea material component 20 is non-toxic and does not release harmful substances, thus avoiding health hazards, thereby comprehensively improving the noise reduction, corrosion prevention, heat preservation, automation and health protection performance of the inner liner body 10.

[0046] In some embodiments of this utility model, such as Figure 1 As shown, a gap may exist between the polyurea material component 20 disposed on the inner liner body 10 and the outer shell. The gap between the outer shell and the polyurea material component 20 prevents interference between the polyurea material component 20 and the outer shell, ensuring the stability of component operation. Sound-absorbing cotton or other structures can also be added within the gap to further absorb noise and reduce dishwasher operating noise, thus enhancing the heat insulation effect. This gap can also form an air buffer layer to assist in heat insulation, utilizing the low thermal conductivity of air to further enhance heat insulation performance and ensure the long-term stability of the protective performance of the polyurea material component 20.

[0047] In some embodiments of this utility model, such as Figure 1 As shown, the door assembly may include an inner door facing the washing chamber 11, with the side of the inner door facing away from the washing chamber 11 covered with a polyurea material 20. The inner door can directly cooperate with the inner tank body 10 to form a sealed washing chamber 11. The polyurea material 20 is covered on both the side of the inner door facing away from the washing chamber 11 and the outer surface of the inner tank body 10, forming an overall thermal insulation and sound insulation system, further improving the energy-saving and noise-reducing effect of the dishwasher.

[0048] In some examples, the surface of the outer casing can also be covered with polyurea material 20. The polyurea material 20 on the surface of the outer casing can resist the impact and friction damage to the outer casing during daily use, reduce surface scratches, fading and other problems, and maintain the appearance of the outer casing. At the same time, the polyurea material 20 absorbs some of the vibration generated during the operation of the dishwasher, weakens the outward transmission of noise, and together with the polyurea material 20 on the inner door and inner liner body 10, forms a more complete sound insulation system, further reducing the operating noise of the dishwasher, and can also help improve the heat insulation effect, preventing users from touching the hot outer casing, thus taking into account both practicality and safety.

[0049] The following is for reference. Figures 1-5 This invention describes a dishwasher according to a specific embodiment of the present invention.

[0050] A dishwasher according to a third aspect embodiment of the present invention includes a housing, an inner tank 100, and a door assembly. The inner tank 100 is disposed within the housing, and the door assembly is disposed on the open side of the inner tank 100. The inner tank 100 includes an inner tank body 10 and a polyurea material component 20. The polyurea material component 20 covers the outer surface of the inner tank body 10, and flexible polyurea layers 21 and rigid polyurea layers 22 are stacked and arranged. The housing and inner door may also be coated with the polyurea material component 20 as required.

[0051] The polyurea material component 20 in the above embodiments is described in detail below. The polyurea material component 20 includes a flexible polyurea layer 21 and a rigid polyurea layer 22 stacked in the thickness direction.

[0052] The flexible polyurea layer 21 is formulated with isocyanate and amino compound components. The isocyanate component contains 11%-13% isocyanate (-NCO) and has a viscosity of 1000-1500 mps at 25°C. The amino compound component contains 3-6 mmol / g of amino and imino groups and has a viscosity of 300-800 mps at 25°C. The volume ratio of isocyanate to amino compound is 1.0, the isocyanate index is 0.8-1.0, and the final coating contains approximately 60-70% soft segments and approximately 30-40% hard segments.

[0053] The specific composition is as follows: The isocyanate component contains three raw materials: diphenylmethane diisocyanate (MDI), polyether polyol, and polypropylene ether polyol. The amino compound component contains three terminal amino polyethers, 4,4'-bis-sec-butylaminodiphenylmethane (MDBA), a silane coupling agent, and an anti-settling agent.

[0054] The rigid polyurea layer 22 is formulated with isocyanate and amino compound components. The isocyanate component contains 13%-16% isocyanate (-NCO) and has a viscosity of 1000-1500 mps at 25°C. The amino compound component contains 3-6 mmol / g of amino and imino groups and has a viscosity of 300-800 mps at 25°C. The volume ratio of isocyanate to amino compound is 1.0, the isocyanate index is 1.0-1.2, and the final coating contains approximately 50-60% soft segments and approximately 40-50% hard segments.

[0055] The specific composition is as follows: The isocyanate component contains four raw materials: two types of diphenylmethane diisocyanate (MDI), polyether polyol, and polypropylene ether polyol. The amino compound component contains three types of amino-terminated polyethers, 4,4'-bis-sec-butylaminodiphenylmethane (MDBA), a silane coupling agent, and an anti-settling agent.

[0056] Isocyanate is the core functional component of polyurea materials. It contains the reactive isocyanate group (-NCO), which can react chemically with amino compounds containing active hydrogen to form a polyurea polymer chain structure. In this embodiment, diphenylmethane diisocyanate (MDI) is the main active ingredient of the isocyanate component, and polyether polyol is used to adjust the flexibility and reactivity of the coating.

[0057] Amino compounds are another core component of polyurea materials, containing active hydrogen groups such as amino and imino groups. They are key reactants that react with isocyanate components, enabling rapid formation of polyurea structures. In this embodiment, the amino compound component uses various terminal amino polyethers as the main source of flexible chains, combined with chain extenders such as 4,4'-bis-sec-butylaminodiphenylmethane (MDBA) and silane coupling agents, to ensure the mechanical properties, workability, and stability of the coating.

[0058] According to the dishwasher of this utility model embodiment, by disposing of the polyurea material component 20 on the outer surface of the inner liner body 10, the polyurea material component 20 can not only absorb vibration and reduce noise, but also enable the inner liner body 10 to resist external bumps and friction, isolate corrosive media, and prevent oxidation and rust of the inner liner body 10. Moreover, the polyurea material component 20 is non-toxic and does not release harmful substances, thus avoiding health hazards, thereby comprehensively improving the noise reduction, corrosion prevention, heat preservation, automation and health protection performance of the inner liner body 10.

[0059] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A dishwasher inner tub (100), characterized in that, include: Inner liner body (10), the inner liner body (10) defines a washing chamber (11) open on one side; A polyurea material component (20) is disposed on the outer surface of the inner liner body (10).

2. The inner tub (100) of the dishwasher according to claim 1, characterized in that, The polyurea material component (20) is formed on the inner liner body (10) by spraying; and / or, the polyurea material component (20) is a foamed material component.

3. The inner liner (100) of the dishwasher according to claim 1 or 2, characterized in that, The thickness of the polyurea material part (20) is 0.1mm-20mm.

4. The inner tub (100) of the dishwasher according to claim 3, characterized in that, The thickness of the polyurea material part (20) is 2mm-5mm.

5. The inner liner (100) of the dishwasher according to claim 1 or 2, characterized in that, The thermal conductivity of the polyurea material component (20) is 18 mW / m·K - 24 mW / m·K.

6. The inner liner (100) of the dishwasher according to claim 1 or 2, characterized in that, The polyurea material component (20) includes a flexible polyurea layer (21) and a rigid polyurea layer (22) stacked in the thickness direction. The flexible polyurea layer (21) is disposed between the rigid polyurea layer (22) and the outer surface of the inner liner body (10). The elastic modulus of the flexible polyurea layer (21) is less than that of the rigid polyurea layer (22).

7. The inner liner (100) of the dishwasher according to claim 6, characterized in that, The thickness of the flexible polyurea layer (21) is 0.1 mm to 2 mm, and / or the thickness of the rigid polyurea layer (22) is 1 mm to 5 mm.

8. A dishwasher, characterized in that, include: shell; The inner liner (100) of the dishwasher according to any one of claims 1-7 is arranged inside the outer casing; A door assembly that can be opened to seal the open side of the inner liner (100).

9. The dishwasher according to claim 8, characterized in that, There is a gap between the polyurea material component (20) disposed on the inner liner body (10) and the outer shell.

10. The dishwasher according to claim 8, characterized in that, The door assembly includes an inner door facing the washing chamber (11), and the side surface of the inner door facing away from the washing chamber (11) is covered with the polyurea material part (20).

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