Contamination-resistant coating solution, method for preparing contamination-resistant coating solution, and cooking appliance comprising contamination-resistant coating layer

Abstract

An oven according to an embodiment may comprise: a cooking chamber including a bottom surface and a wall surface; a door arranged to open and close the cooking chamber; a heater arranged to supply heat into the cooking chamber; and a contamination-resistant coating layer formed on the wall surface of the cooking chamber and the inner surface of the door. The contamination-resistant coating layer may comprise siloxane imide and SiO2 powder. The SiO2 powder may be surface-modified with a methyl group.

Description

Contamination-resistant coating solution, method for manufacturing a contamination-resistant coating solution, and cooking appliance including a contamination-resistant coating layer

[0001] Various embodiments of the present disclosure relate to a contamination-resistant coating solution, a method for manufacturing a contamination-resistant coating solution, and a cooking appliance comprising a contamination-resistant coating layer.

[0002] Cooking appliances may include appliances such as ovens, cooktops, electric ranges, and air fryers. For example, an oven may generally be composed of a cooking chamber, a heating device that supplies heat to the cooking chamber, and a circulation fan that circulates the heat generated by the heating device inside to cook food. For example, a cooktop heats food using an induction heating device as a heat source and may be configured to have a ceramic glass with excellent heat resistance placed on the top.

[0003] During the heating and cooking process, foreign substances such as oil adhere to the inner walls of the cooking chamber or the ceramic glass surface of the cooktop, requiring cleaning. However, if the foreign substances become hardened, cleaning becomes difficult. Accordingly, research is being conducted on anti-contamination coating materials with improved heat resistance that offer excellent cleaning properties and can be used stably even at high temperatures.

[0004] The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure.

[0005] An oven according to one embodiment may include a cooking chamber comprising a bottom surface and a wall surface, a door arranged to open and close the cooking chamber, a heater arranged to supply heat inside the cooking chamber, and a contamination-resistant coating layer coated on the wall surface of the cooking chamber and the inner surface of the door. The contamination-resistant coating layer may include siloxane imide and SiO2 powder. The SiO2 powder may be surface-modified with methyl groups.

[0006] A contamination-resistant coating solution according to one embodiment may comprise 12 wt% to 29 wt% of siloxane amide, 10 wt% to 15 wt% of SiO2 powder, and 25 wt% to 30 wt% of methyl-functional silane based on the total weight of the contamination-resistant coating solution.

[0007] A cooktop according to one embodiment may include a cooktop body, a ceramic glass disposed on the upper part of the cooktop body, and a contamination-resistant coating layer coated on the upper surface of the ceramic glass. The contamination-resistant coating layer may include siloxane imide and SiO2 powder. The SiO2 powder may be surface-modified with methyl groups.

[0008] The effects obtainable from the exemplary embodiments of the present disclosure are not limited to those mentioned above, and other unmentioned effects can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure belong from the description below. That is, unintended effects resulting from the implementation of the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0009] FIG. 1 is a perspective view illustrating a cooking apparatus according to one embodiment.

[0010] FIG. 2 is a drawing showing the rear of the internal cabinet of a cooking appliance according to one embodiment.

[0011] FIG. 3 is a side cross-sectional view showing a side cross-section of a cooking device according to one embodiment, cut in the front-rear direction.

[0012] FIG. 4 is a diagram schematically illustrating the cross-sectional structure of an anti-contamination coating layer applied around a cooking space in a cooking appliance according to one embodiment.

[0013] FIG. 5 is a flowchart illustrating the process of coating the cooking chamber and the surroundings of a cooking device according to one embodiment.

[0014] FIG. 6 is a flowchart illustrating a method for preparing an anti-fouling coating solution according to one embodiment.

[0015] FIGS. 7a and 7b are drawings illustrating the difference in surface energy of an anti-fouling coating layer according to one embodiment.

[0016] FIG. 8 is an exemplary graph showing the surface roughness of an anti-fouling coating layer according to one embodiment.

[0017] FIGS. 9a and 9b are experimental examples for comparing the contamination state after using a cooking appliance before and after coating with an anti-contamination coating layer according to one embodiment.

[0018] FIG. 10 is a perspective view of a cooking device according to one embodiment.

[0019] FIG. 11 is an exploded perspective view of a cooking device according to one embodiment.

[0020] FIG. 12 is a schematic cross-sectional view of a ceramic glass according to one embodiment.

[0021] In the following description, the attached drawings are referenced, and specific examples of implementation are illustrated within the drawings. Additionally, other examples may be used and structural modifications may be made without departing from the scope of the various examples.

[0022] The various embodiments used to illustrate the principles of the present disclosure in FIGS. 1 through 12 disclosed below and in this patent document are for illustrative purposes only and should not be construed as limiting the scope of the present disclosure in any way. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any system or device appropriately arranged.

[0023] Hereinafter, embodiments of the present disclosure are described in detail with reference to the drawings so that those skilled in the art can easily practice them. However, the present disclosure may be embodied in various different forms and is not limited to the embodiments described herein. In relation to the description of the drawings, the same or similar reference numerals may be used for identical or similar components. Furthermore, in the drawings and related descriptions, descriptions of well-known functions and configurations may be omitted for clarity and brevity.

[0024] FIG. 1 is a perspective view illustrating a cooking apparatus according to one embodiment.

[0025] FIG. 2 is a drawing showing the rear of the internal cabinet of a cooking appliance according to one embodiment.

[0026] FIG. 3 is a side cross-sectional view showing a side cross-section of a cooking device according to one embodiment, cut in the front-rear direction.

[0027] All features, components, and / or arrangement relationships between components illustrated in FIGS. 1 through 3 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIGS. 4 through 12 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIGS. 1 through 3.

[0028] Referring to FIGS. 1 to 3, an oven (1) according to one embodiment of the present disclosure may include a cooking chamber (20), a main body (10) forming the cooking chamber (20), and a door (30) for opening and closing the cooking chamber (20). The oven (1) may be referred to as a cooking device.

[0029] According to one embodiment, the main body (10) may include an inner cabinet (11) that forms a cooking chamber (20) inside. The inner cabinet (11) may be provided inside an outer cabinet (12) of the main body (10) described later.

[0030] According to one embodiment, an internal cabinet (11) may form a cooking chamber (20). The internal cabinet (11) may include an upper plate (11a), a lower plate (11d), a side plate (11e), and a rear plate (11b). The upper plate (11a), lower plate (11d), side plate (11e), and rear plate (11b) may each be provided as separate components and combined with each other. Alternatively, the upper plate (11a), lower plate (11d), side plate (11e), and rear plate (11b) may be formed integrally. The upper plate (11a) may form the upper surface of the cooking chamber (20). The lower plate (11d) may form the bottom surface of the cooking chamber (20). The side plate (11e) and the rear plate (11b) may form the wall surfaces of the cooking chamber (20).

[0031] According to one embodiment, the rear plate (11b) of the inner cabinet (11) may form the rear surface of the inner cabinet (11). The rear surface of the inner cabinet (11) may include a recess (11c) that is recessed backward. A convection assembly (100) to be described later may be installed in the recess (11c).

[0032] According to one embodiment, the cooking chamber (20) may be formed with an open front to allow for the handling of food. The inner cabinet (11) may include an opening (not shown) formed to be open for the entry and exit of food into the cooking chamber (20). One side of the main body (10) where the opening (not shown) is formed may be defined as the front of the main body (10). For example, the inner cabinet (11) may have a box shape with an open front. The inner wall of the inner cabinet (11) may be coated to prevent corrosion of the inner wall of the inner cabinet (11) by condensation that may occur during the steam condensation process or by moisture contained in the food itself. The inner wall of the inner cabinet (11) may be dried by the heat generated during the food cooking process.

[0033] According to one embodiment, the oven (1) may include a plate (25) placed inside a cooking chamber (20) to accommodate food and a rack (26) supporting the plate (25). The plate (25) and the rack (26) may be positioned to be inserted into or removed from the cooking chamber (20) through an opening (not shown) of an internal cabinet (11). For example, the rack (26) may be arranged to slide into the cooking chamber (20) or removed from the cooking chamber (20) by sliding against the internal cabinet (11).

[0034] According to one embodiment, the oven (1) may include a heater (130) provided to supply heat inside the cooking chamber (20) for cooking food, and a fan (140) provided to allow air heated by the heater to flow smoothly inside the cooking chamber (20). However, it is not limited thereto, and various configurations may be provided inside the cooking chamber (20) depending on the purpose and function of the oven (1).

[0035] According to one embodiment, the oven (1) may include an electrical chamber formed separately from the cooking chamber (20). The electrical chamber may be formed inside the main body (10). An inner cabinet (11) may partition the cooking chamber (20) and the electrical chamber (not shown). The electrical chamber may be formed to surround the inner cabinet (11). The electrical chamber may insulate the space between the cooking chamber (20) and the outer case of the main body (10) to prevent heat inside the cooking chamber (20) from being released directly to the outside of the main body (10). Air may flow through the electrical chamber for insulation. A separate insulating material (not shown) may be placed in the electrical chamber to surround the inner cabinet (11) for insulation. The insulating material may be composed of insulating materials such as glass fiber or asbestos.

[0036] According to one embodiment, various electrical components, such as a printed circuit board (not shown) that controls the operation of the oven (1), may be arranged inside the electrical room. The oven (1) may include a steam generating device (not shown) arranged inside the electrical room to generate steam. The oven (1) may include an automatic opening and closing device (not shown) that automatically opens and closes the door (30). The automatic opening and closing device may be arranged inside the electrical room.

[0037] According to one embodiment, the oven (1) may include a cooling fan module (not shown) for cooling heat generated from various electrical components. The cooling fan module may be placed inside the electrical room.

[0038] According to one embodiment, the main body (10) may include an outer cabinet (12) that forms at least a part of the exterior of the oven (1). The cooking chamber (20) and the electrical chamber may be disposed inside the outer cabinet (12) of the main body (10).

[0039] According to one embodiment, the outer cabinet (12) of the main body (10) may include an upper surface panel (12a) forming the upper surface of the oven (1). The upper surface panel (12a) may cover the upper part of the electrical room.

[0040] According to one embodiment, the outer cabinet (12) of the main body (10) may include side panels (12b) forming the left and right sides of the oven (1). For example, the side panels (12b) may include heat dissipation holes (12h) formed to release heat from inside the electrical chamber.

[0041] According to one embodiment, the outer cabinet (12) of the main body (10) may include a rear panel (12c) forming the rear of the oven (1). For example, the rear panel (15) may include a heat dissipation hole (not shown) formed to release heat from inside the electrical chamber.

[0042] According to one embodiment, the outer cabinet (12) of the main body (10) may include a base (12d) forming the bottom surface of the oven (1). The upper panel (12a), side panel (12b), rear panel (12c) and base (12d) may each be formed to have a roughly flat plate shape, but their respective shapes are not limited thereto.

[0043] According to one embodiment, the main body (10) may include a front frame (12e) that forms at least a portion of the front of the main body (10). The front frame (12e) may be positioned at the front of the main body (10). The front frame (12e) may be covered by the door (30) when the door (30) is closed.

[0044] According to one embodiment, the front frame (12e) may be formed in the shape of a frame having an opening. The front frame (12e) may be formed along the perimeter of the opening (not shown) of the inner cabinet (11). For example, the inner cabinet (11) may be coupled to the front frame (12e), and a portion adjacent to the opening (not shown) of the inner cabinet (11) may be coupled to the front frame (12e).

[0045] According to one embodiment, the front frame (12e) may be coupled to the upper panel (12a). The front frame (12e) may be coupled to the left side panel and the right side panel of the side panels (12b), respectively. The front frame (12e) may be coupled to the base (12d).

[0046] According to one embodiment, the front frame (12e), top panel (12a), side panel (12b), rear panel (12c), and base (12d) may be detachably connected to each other. However, this is not limited thereto, and only parts of the front frame (12e), top panel (12a), side panel (12b), and base (12d) may be detachable, while other parts may be formed integrally with each other.

[0047] According to one embodiment, the oven (1) may include a control panel (41). The control panel (41) may include a display unit capable of displaying various operation information of the oven (1) and an input unit capable of inputting operation commands by a user. The input unit may be a touch panel. The input unit may include buttons or knobs. For example, the control panel (41) may be positioned on the upper front of the oven (1).

[0048] According to one embodiment, the oven (1) may include a control panel bracket (42) for mounting a control panel (41). The control panel bracket (42) may be coupled to the main body (10). For example, the control panel bracket (42) may be coupled to the front of the main body (10). The control panel bracket (42) may be coupled to the upper part of the front frame (12e).

[0049] According to one embodiment, the control panel (41) may be mounted on a control panel bracket (42). The control panel (41) may be mounted on the front of the control panel bracket (42). The control panel bracket (42) may include an opening (not shown) so that at least a portion of the rear surface of the control panel (41) can be cooled by a cooling fan module placed in the electrical room.

[0050] According to one embodiment, the oven (1) may include a door (30) provided to open and close the cooking chamber (20). The door (30) may be rotatably coupled to the main body (10) to open and close the cooking chamber (20). For example, the door (30) may be rotatably coupled to the lower part of the main body (10) and may be rotatably arranged around a rotation axis provided at the lower part of the oven (1), but is not limited thereto. The door (30) may also be rotatably coupled to the side of the main body (10).

[0051] According to one embodiment, the door (30) may include a transparent portion (32) that is formed transparently so that a user can look inside the kitchen (20) even when the door (30) closes the kitchen (20). The transparent portion (32) may include various transparent materials, such as glass.

[0052] According to one embodiment, the door (30) may include a handle (33) formed to allow a user to manually open and close the door (30). To allow the user to easily open and close the door (30), the handle (33) may be provided adjacent to a part of the door (30) opposite to the axis of rotation of the door (30). FIG. 1 illustrates an embodiment in which the handle (33) is provided on the front of the door (30), but is not limited thereto. The term "front of the door (30)" as used herein refers to a front side of the door (30) in the X-direction, based on the state when the door (30) is closing the kitchen (20).

[0053] According to one embodiment, the oven (1) may include a convection assembly (100) for circulating air inside the cooking chamber (20). The convection assembly (100) can draw in air inside the cooking chamber (20), and after the heater (130) described later heats the drawn-in air, it is discharged by a fan (140) to heat and circulate the air inside the cooking chamber (20). In this illustration, the convection assembly (100) is shown as one, but it may be provided as two or more. That is, the number of convection assemblies (100) can be varied in many ways.

[0054] According to one embodiment, the convection assembly (100) may be installed inside the cooking chamber (20). For example, the convection assembly (100) may be installed on one side of the inner cabinet (11). For example, as shown in FIG. 2, the convection assembly (100) may be installed on the rear side of the inner cabinet (11). However, not limited thereto, the convection assembly (100) may also be installed on the upper side of the inner cabinet (11).

[0055] Referring to FIG. 2, the inner cabinet (11) may include a recess (11c) that is recessed from the rear to the rear. A convection assembly (100) may be installed in the recess (11c). Since the convection assembly (100) is installed inside the cooking chamber (20), it may be positioned protruding from the rear of the inner cabinet (11). The convection assembly (100) may occupy a portion of the interior space of the cooking chamber (20).

[0056] According to one embodiment, the convection assembly (100) may include a cover case (110) that covers a heater (130) and a fan (140). The cover case (110) may accommodate the heater (130) and the fan (140) inside. The cover case (110) may be formed of a metal material to prevent deformation due to heat. The cover case (110) may be placed inside the cooking chamber (20) while covering the heater (130) and the fan (140). That is, since the cover case (110) does not form one side of the cooking chamber (20), it may have a relatively small size and a small heat capacity.

[0057] According to one embodiment, the convection assembly (100) may form a passage through which inhaled air and discharged air pass. Since the heater (130), which will be described later, is positioned to surround the fan (140), the passage may be formed so that all inhaled air can be heated by the heater (130) before being discharged. The fan (140) may be positioned close to the upstream side of the passage, and the heater (130) may be positioned close to the downstream side of the passage.

[0058] According to one embodiment, the convection assembly (100) may include a heater (130) that generates heat to heat the air inside the cooking chamber (20). The heater (130) may heat the food inside the cooking chamber (20). The heater (130) may be installed on one side of the internal cabinet (11).

[0059] According to one embodiment, the convection assembly (100) may include a fan (140) that circulates air inside the cooking chamber (20). The fan (140) may draw air into the cover case (110) and circulate air to discharge air outside the cover case (110).

[0060] According to one embodiment, the fan (140) can draw in air from the front of the fan (140) and discharge air in the radial direction of the fan (140). A heater (130) may be located on the outside of the fan (140) so as to heat the air drawn in by the fan (140) before it is discharged. In this illustration, the heater (130) has a roughly circular or spiral structure surrounding the outside of the fan (140), but is not limited thereto. For example, it may have a roughly rectangular shape or a plurality of bar shapes to surround the outside of the fan (140). In addition, the structure and arrangement of the heater (130) and the fan (140) may be varied in many ways.

[0061] According to one embodiment, if a heater (130) is provided in a circular shape and positioned on the outside of the fan (140) to surround the fan (140), the air flows in a radial direction due to the rotation of the fan (140), so that it can be heated evenly.

[0062] According to one embodiment, the fan (140) can rotate by the rotation of a motor (142) installed on one side of the internal cabinet (11). A motor shaft (141) extending from the motor (142) can be coupled to the center of the fan (140). The rotational force of the motor (142) can be transmitted to the fan (140) through the motor shaft (141). However, it is not limited thereto, and the motor (142) may be embedded in the fan (140) so that the fan (140) rotates.

[0063] According to one embodiment, the convection assembly (100) may include a glass member (150) through which heat generated from a heater (130) provided inside can pass. The glass member (150) may be positioned on the front (1111) of the cover case (110) so that the heat passing through it can be transferred to the food inside the cooking chamber (20).

[0064] According to one embodiment, the heater (130) can emit heat, i.e., infrared rays. The infrared rays generated from the heater (130) can be directed toward the food inside the cooking chamber (20) through the glass member (150), and the food can be heated by the directed infrared rays. Through this, the heat loss of the oven (1) can be reduced, thereby increasing energy efficiency.

[0065] According to one embodiment, the cover case (110) is installed on one side of the inner cabinet (11), and at least a portion of it may be positioned at a predetermined distance so that air can flow between it and the one side of the inner cabinet (11). Specifically, at least a portion of the cover case (110) may be positioned at a predetermined distance from one side of the inner cabinet (11).

[0066] According to one embodiment, the cover case (110) may be fixed or fastened by a fixing or fastening means so as to be installed on one side of the inner cabinet (11). At this time, heat generated from the heater (130) inside the cover case (110) may be conducted to the inner cabinet (11) through a portion that contacts one side of the inner cabinet (11).

[0067] FIG. 4 is a diagram schematically illustrating the cross-sectional structure of an anti-contamination coating layer applied around a cooking space in a cooking appliance according to one embodiment.

[0068] All features, components, and / or arrangement relationships between components illustrated in FIG. 4 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIG. 1 through 3 and FIG. 5 through 12 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIG. 4.

[0069] FIG. 4 is a schematic representation for explaining the structure of a coating layer coated on a surface defining a cooking chamber (e.g., cooking chamber (20) of FIG. 2) of a cooking appliance (e.g., oven (1) of FIG. 1), and for convenience of explanation, the thickness of the coating layers may be shown somewhat exaggerated.

[0070] Referring to FIG. 4, a cooking device according to one embodiment (e.g., oven (1) of FIG. 1) may include at least one of a plate (410), a hydrophilic coating layer (420), or a contamination-resistant coating layer (430).

[0071] According to one embodiment, the plate (410) may be a part of the main body (e.g., the main body (10) of FIG. 1) or a part of the door (e.g., the door (30) of FIG. 1). The plate (410) may be, for example, an inner plate of the door (30). Here, the inner plate of the door (30) may refer to a plate positioned in the direction toward the kitchen (20) from the door (30). The plate (410) may be, for example, a part of the interior cabinet (e.g., the interior cabinet (11) of FIG. 3). The plate (410) may be, for example, an upper plate (e.g., the upper plate (11a) of FIG. 3), a lower plate (e.g., the lower plate (11d) of FIG. 3), a side plate (e.g., the side plate (11e) of FIG. 3), or a rear plate (e.g., the rear plate (11b) of FIG. 3) of the interior cabinet (11).

[0072] According to one embodiment, a hydrophilic coating layer (420) may be coated on a plate (410). The hydrophilic coating layer (420) may include a hydrophilic crystalline mineral. For example, the hydrophilic crystalline mineral may include at least one of SiO2, Al2O3, K2O, Li2O, NaF, or MgO, but is not limited thereto. Here, the hydrophilic coating layer (420) may be referred to as a ceramic coating layer or an enamel coating layer.

[0073] According to one embodiment, a hydrophilic coating layer (420) may be coated on surfaces surrounding a cooking chamber (e.g., cooking chamber (20) of FIG. 3). For example, the hydrophilic coating layer (420) may be coated on the top, side, rear, and bottom surfaces of the cooking chamber (20). For example, the hydrophilic coating layer (420) may be coated on the inner surface of a door (e.g., door (30) of FIG. 3).

[0074] According to one embodiment, the contamination-resistant coating layer (430) may comprise siloxane imide and SiO2 powder. The SiO2 powder may be surface-modified with methyl groups. The particle size of the SiO2 powder may be 300 nm to 500 nm. The SiO2 powder may be a nano powder. The contamination-resistant coating layer (430) may also be referred to as an anti-contamination coating layer.

[0075] According to one embodiment, a contamination-resistant coating layer (430) may be coated on the wall surface of the cooking chamber (20). For example, the contamination-resistant coating layer (430) may be coated on the inner surface of the side plate (11e) of the inner cabinet (11). For example, the contamination-resistant coating layer (430) may be coated on the inner surface of the rear plate (11b) of the inner cabinet (11). The contamination-resistant coating layer (430) may be formed by applying the anti-contamination coating liquid, which will be described later in FIG. 6, onto the wall surface of the cooking chamber (20) and then heating it.

[0076] According to one embodiment, the contamination-resistant coating layer (430) may not be coated on the bottom surface of the cooking chamber (20). For example, the contamination-resistant coating layer (430) may not be coated on the lower plate (11d) of the inner cabinet (11). Only the hydrophilic coating layer (420) may be coated on the bottom surface of the cooking chamber (20).

[0077] According to one embodiment, a contamination-resistant coating layer (430) may be coated on the inner surface of the door (30). For example, the contamination-resistant coating layer (430) may be coated on the inner surface of the transparent part (32) of the door (30). The contamination-resistant coating layer (430) may be formed by applying the anti-contamination coating liquid, which will be described later in FIG. 6, onto the inner surface of the door (30) and then heating it.

[0078] According to one embodiment, a contamination-resistant coating layer (430) may be coated on a cover case (e.g., the cover case (110) of FIG. 3). The contamination-resistant coating layer (430) may be formed by applying an anti-contamination coating liquid, which will be described later in FIG. 6, onto the surface of the cover case (110) and then heating it.

[0079] According to one embodiment, the contamination-resistant coating layer (430) may be configured such that at least 80 wt% of the material relative to the total weight of the contamination-resistant coating layer (430) contains Si-O bonds. The contamination-resistant coating layer (430) may have heat resistance of 350 degrees Celsius or higher without containing fluorine (F). The physical properties of the contamination-resistant coating layer (430) are described in detail in FIG. 6.

[0080] According to one embodiment, the thickness of the contamination-resistant coating layer (430) may be 1 μm to 10 μm. The contamination-resistant coating layer (430) may be thinner than the hydrophilic coating layer (420). By configuring the thickness of the contamination-resistant coating layer (430) to be thin, the color around the cooking chamber (20) can be maintained even after the contamination-resistant coating layer (430) is coated.

[0081] FIG. 5 is a flowchart illustrating the process of coating the cooking chamber and the surroundings of a cooking device according to one embodiment.

[0082] All features, components, and / or arrangement relationships between components illustrated in FIG. 5 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIG. 1 through 4 and FIG. 6 through 12 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIG. 5.

[0083] Referring to FIG. 5, a method for manufacturing an oven (e.g., oven (1) of FIG. 1) according to one embodiment may include a pretreatment process (S510). The pretreatment process may be performed to remove contaminants from the surface of a substrate and to ensure uniform adhesion. The pretreatment process may be performed in a manner such as chemical cleaning, plasma treatment, UV / ozone treatment, or ultrasonic cleaning, but is not limited thereto.

[0084] According to one embodiment, the method for manufacturing the oven (1) may include a process (S520) for applying a hydrophilic coating liquid. The hydrophilic coating liquid may be applied to the inner wall constituting the cooking chamber (e.g., cooking chamber (20) of FIG. 3). For example, the hydrophilic coating liquid may be applied to the upper plate (e.g., upper plate (11a) of FIG. 3), the side plate (e.g., side plate (11e) of FIG. 3), the rear plate (e.g., rear plate (11b) of FIG. 3), and the lower plate (e.g., lower plate (11d) of FIG. 3) of the inner cabinet (e.g., inner cabinet (11) of FIG. 3). For example, the hydrophilic coating liquid may be applied to the cover case (e.g., cover case (110) of FIG. 3). For example, the hydrophilic coating liquid may be applied to the inner surface of the door (e.g., door (30) of FIG. 3). For example, a hydrophilic coating solution can be applied to the transparent part of the door (30) (e.g., the transparent part (32) of FIG. 1).

[0085] A hydrophilic coating solution can increase the surface energy of a substrate surface. For example, the hydrophilic coating solution may include silica or metal oxide nanoparticles. For example, the hydrophilic coating solution may include a polymer or a surfactant-based hydrophilic material. For example, the hydrophilic coating solution may include a binder and a solvent. The hydrophilic coating solution may include a hydrophilic crystalline mineral. For example, the hydrophilic crystalline mineral may include at least one of SiO2, Al2O3, K2O, Li2O, NaF, or MgO, but is not limited thereto.

[0086] According to one embodiment, the method for manufacturing the oven (1) may include a hydrophilic coating solution calcination process (S530). In the calcination process, the hydrophilic coating solution applied in the S520 process may be dried and cured to form a hydrophilic coating layer (e.g., the hydrophilic coating layer (420) of FIG. 4). By inducing solvent evaporation and stable fixation of nanoparticles through the calcination process, the physical properties of the coating layer can be optimized.

[0087] According to one embodiment, the method for manufacturing the oven (1) may include a process (S540) for applying a contamination-resistant coating solution. The contamination-resistant coating solution may be applied on a hydrophilic coating layer (420). The contamination-resistant coating solution may be applied on the portion coated with the hydrophilic coating layer (420), excluding the bottom surface of the cooking chamber (20). For example, the contamination-resistant coating solution may be applied on the plates of the inner cabinet (11) excluding the lower plate (11d) of the inner cabinet (11).

[0088] According to one embodiment, the contamination-resistant coating solution may comprise 12 wt% to 29 wt% of siloxane amide based on the total weight of the contamination-resistant coating solution as a component forming the basic structure. The siloxane amide may be formed from polysilane, polycarbosilane, polysiloxane, or polysilazane, but is not limited thereto.

[0089] According to one embodiment, the contamination-resistant coating solution may comprise 10 wt% to 15 wt% of SiO2 powder and 25 wt% to 30 wt% of methyl-functional silane as hydrophobic components relative to the total weight of the contamination-resistant coating solution. The size of the SiO2 powder particles may be 300 nm to 500 nm. The size of the SiO2 powder particles may affect the surface roughness of the anti-contamination coating layer (e.g., the anti-contamination coating layer (430) of FIG. 4). As the size of the SiO2 powder particles increases, the surface roughness of the anti-contamination coating layer (430) may increase. If the SiO2 powder exceeds 15 wt% relative to the total weight of the contamination-resistant coating solution, it may be difficult to form a uniform coating layer due to insufficient adhesion during the application process of the coating solution. If the SiO2 powder is less than 10 wt% of the total weight of the contamination-resistant coating solution, it may be difficult to form a surface energy of 30 mN / m or less. Therefore, in order to secure adhesion with a surface energy of 30 mN / m or less, the content of SiO2 may be 10 wt% to 15 wt% of the total weight of the contamination-resistant coating solution.

[0090] Methyl functional silanes may include, but are not limited to, methyltrimethoxysilane (MTMS), methyltriethoxysilane (MTES), dimethyldimethoxysilane (DMDMS), dimethyldiethoxysilane (DMDES), dimethyldichlorosilane (DMDCS), or methyltrichlorosilane (MTCS).

[0091] According to one embodiment, the contamination-resistant coating solution may comprise, as a solvent, an alcohol in an amount of 35 wt% to 40 wt% of the total weight of the contamination-resistant coating solution and an ammonia or amine-based alkali solution with a pH of 11 or higher in an amount of 1 wt% to 3 wt%. The alcohol may include, but is not limited to, methanol, ethanol, n-butanol, n-propanol, isobutanol, tert-butanol, pentanol, or isopropyl alcohol. Ammonia or amine-based alkaline solutions with a pH of 11 or higher may include, but are not limited to, water ammonia, ammonium chloride, triethylamine, monoethanolamine (MEA), diethylamine, ethylenediamine, or ammonium acetate.

[0092] According to one embodiment, the method for manufacturing the oven (1) may include a contamination-resistant coating solution drying and curing process (S550). After the application of the contamination-resistant coating solution is completed, the contamination-resistant coating solution may be dried and cured in a high-temperature environment. The drying and curing process may be performed, for example, by raising the internal temperature of the chamber to 250 degrees Celsius and then heat treating for at least 30 minutes after reaching 250 degrees Celsius. The drying and curing process may be performed, for example, by heat treating for a first time in a first chamber in the range of 90 to 110 degrees Celsius, and then heat treating for a second time in a second chamber in the range of 240 to 260 degrees Celsius. For example, the first time may be within 30 minutes. For example, the second time may be from 20 minutes to 1 hour. In the drying and curing process, the solvent of the contamination-resistant coating solution may evaporate to form a contamination-resistant coating layer (e.g., the contamination-resistant coating layer (430) of FIG. 4). In the drying and curing process, the siloxane amide of the contamination-resistant coating solution is imidized at high temperatures, so it can have heat resistance of 490 degrees or higher.

[0093] FIG. 6 is a flowchart illustrating a method for preparing an anti-fouling coating solution according to one embodiment.

[0094] All features, components, and / or arrangement relationships between components illustrated in FIG. 6 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIG. 1 through 5 and FIG. 7a through 12 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIG. 6.

[0095] FIG. 6 is an exemplary drawing for explaining a method of manufacturing an anti-contamination coating solution used in the S540 process of FIG. 5.

[0096] Referring to FIG. 6, a method for preparing a contamination-resistant coating solution according to one embodiment may include a process (S610) of mixing SiO2 powder with a methyl-functional silane. The SiO2 powder and the methyl-functional silane may be mixed in an alcohol (or lower alcohol) as a solvent. For example, the methyl-functional silane may be methyltrimethoxysilane (MTMS).

[0097] According to one embodiment, a method for preparing a contamination-resistant coating solution may include a process (S620) of adding an ammonia or amine-based alkali solution with a pH of 11 or higher to the solution of S610. The ammonia or amine-based alkali solution may act as a catalyst. For example, the ammonia or amine-based alkali solution may be water ammonia. When the ammonia or amine-based alkali solution is added to the solution of S610, the SiO2 powder may be surface-modified to methyl groups.

[0098] According to one embodiment, the process may include a step (S630) of mixing methylated SiO2 powder with siloxane amide. Siloxane amide may be formed from polysilane, polycarbosilane, polysiloxane, or polysilazane. By adding surface-methylated SiO2 powder to the siloxane amide, hydrophobicity can be imparted to the siloxane amide. A contamination-resistant coating solution can be prepared through the S630 process.

[0099] When the contamination-resistant coating solution prepared by the method of Fig. 6 is dried and cured, a contamination-resistant coating layer (e.g., the contamination-resistant coating layer (430) of Fig. 4) can be formed.

[0100] According to one embodiment, the surface roughness (roughness) of the contamination-resistant coating layer (430) may be RMS 100 nm to 500 nm. If the surface roughness of the contamination-resistant coating layer (430) exceeds 500 nm, grooves are formed on the surface of the coating layer, and fine foreign substances may get stuck between the grooves and not be easily removed during cleaning. That is, if the surface roughness of the contamination-resistant coating layer (430) exceeds 500 nm, the cleaning ability may be reduced. If the surface roughness of the contamination-resistant coating layer (430) is 100 nm or less, the surface energy of the contamination-resistant coating layer (430) increases, and oil attached during the cooking process may become fixed.

[0101] According to one embodiment, the contamination-resistant coating layer (430) may have heat resistance of 350 degrees Celsius or higher. The hardness of the contamination-resistant coating layer (430) may be 1 GPa or higher. The haze of the contamination-resistant coating layer (430) may be 5% or lower. Due to the low haze of the contamination-resistant coating layer (430), the deterioration of the internal color can be minimized even when coated on a cooking chamber (e.g., cooking chamber (20) of FIG. 3).

[0102] FIGS. 7a and 7b are drawings illustrating the difference in surface energy of an anti-fouling coating layer according to one embodiment.

[0103] All features, components, and / or arrangement relationships between components illustrated in FIGS. 7a and 7b may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIGS. 1 through 6 and FIGS. 8 through 12 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIGS. 7a and 7b.

[0104] FIGS. 7a and 7b exemplarily illustrate the difference in surface energy of a contamination-resistant coating layer (e.g., the contamination-resistant coating layer (430) of FIG. 4) according to one embodiment.

[0105] FIG. 7a shows the state when water or oil is dropped onto the hydrophilic coating layer (420), and FIG. 7b shows the state when water or oil is dropped onto the contamination-resistant coating layer (430). FIG. 7a (a) and FIG. 7b (a) show the state when water is dropped onto the surface, and FIG. 7a (b) and FIG. 7b (b) show the state when oil is dropped onto the surface.

[0106] Referring to FIGS. 7a and 7b, when water is dropped, the first contact angle (710) of water in the hydrophilic coating layer (420) may be smaller than the third contact angle (730) of water in the contamination-resistant coating layer (430).

[0107] Referring to FIGS. 7a and 7b, when oil is dropped, the second contact angle (720) of the oil in the hydrophilic coating layer (420) may be smaller than the fourth contact angle (740) of the oil in the contamination-resistant coating layer (430).

[0108] Through this difference in contact angle, it can be confirmed that the surface energy of the contamination-resistant coating layer (430) is smaller than the surface energy of the hydrophilic coating layer (420). Due to the small surface energy of the contamination-resistant coating layer (430), oil can be easily removed without adhering to the surface of the contamination-resistant coating layer (430).

[0109] FIG. 8 is an exemplary graph showing the surface roughness of an anti-fouling coating layer according to one embodiment.

[0110] All features, components, and / or arrangement relationships between components illustrated in FIG. 8 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIG. 1 through 7b and FIG. 9a through 12 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIG. 8.

[0111] FIG. 8 is an exemplary graph showing the measured surface height of a contamination-resistant coating layer (e.g., the contamination-resistant coating layer (430) of FIG. 4). The change in surface height was measured over a range of 10 mm in any area of ​​the contamination-resistant coating layer (430). FIG. 8 is an experimental value for any area and does not limit the scope of the present disclosure.

[0112] According to one embodiment, the surface roughness of the contamination-resistant coating layer (430) may be RMS 100 nm to 500 nm. If the surface roughness is less than 100 nm, it may be difficult to lower the surface energy to 30 mN / m or less. If the surface roughness is greater than 500 nm, fine gaps may form, causing foreign substances to get stuck and making it difficult to remove them by cleaning.

[0113] FIGS. 9a and 9b are experimental examples for comparing the contamination state after using a cooking appliance before and after coating with an anti-contamination coating layer according to one embodiment.

[0114] All features, components, and / or arrangement relationships between components illustrated in FIGS. 9a and 9b may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIGS. 1 through 8 and FIGS. 10 through 12 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIGS. 9a and 9b.

[0115] FIGS. 9a and 9b are actual use test images and are for convenience of explanation and do not limit the scope of the rights of the present disclosure. FIGS. 9a and 9b respectively illustrate the area of ​​contaminants adhering to the left and right walls after roasting chicken three times. FIG. 9a is an oven before a contamination-resistant coating layer (e.g., the contamination-resistant coating layer (430) of FIG. 4) is coated, and FIG. 9b is an oven after the contamination-resistant coating layer (430) is coated.

[0116] Referring to FIG. 9a, before the contamination-resistant coating layer (430) is coated, it can be seen that the left and right walls of the cooking chamber are contaminated with oil, accounting for 10.7% and 20.8% of the wall area, respectively. Referring to FIG. 9b, after the contamination-resistant coating layer (430) is coated, it can be seen that the left and right walls of the cooking chamber are contaminated with oil, accounting for 0.8% and 0.7% of the wall area, respectively.

[0117] As described above, the contamination-resistant coating layer (430) is coated on the side of the cooking chamber (e.g., cooking chamber (20) of FIG. 3), and due to the low surface energy, contaminants such as oil generated during cooking do not remain on the wall surface but can be moved to the bottom surface by gravity. Thus, the contamination level of the wall surface of the cooking chamber (20) can be improved.

[0118] When a contamination-resistant coating layer (430) is coated on the side of the cooking chamber (20), contaminants can accumulate on the bottom surface of the cooking chamber (20). As previously described, the bottom surface of the cooking chamber (20) is coated only with a hydrophilic coating layer (420) without the contamination-resistant coating layer (430), so the user can easily separate and remove oil from the bottom surface by filling a certain amount of water into the bottom surface and heating it. In the past, a pyro-cleaning method was used, which involves operating the cooking chamber (20) in an environment of 450 degrees Celsius or higher for more than 3 hours to turn contaminants into ash and remove them; however, this method had the disadvantages of taking a long time, consuming a lot of power, and causing unpleasant odors. In the present disclosure, the contamination-resistant coating layer (430) prevents oil from adhering to the wall surface, and contaminants can be easily removed by filling the bottom surface of the cooking chamber (20) with water and heating it within 1 hour in an environment of approximately 100 degrees Celsius.

[0119] FIG. 10 is a perspective view of a cooking device according to one embodiment.

[0120] FIG. 11 is an exploded perspective view of a cooking device according to one embodiment.

[0121] All features, components, and / or arrangement relationships between components illustrated in FIGS. 10 and 11 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIGS. 1 through 9b and FIG. 12 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIGS. 10 and 11.

[0122] The drawings of the cooktop (or cooking appliance) shown in FIGS. 10 and 11 are exemplary for convenience of explanation, and the scope of the present disclosure is not limited by the illustrated shape and structure.

[0123] Referring to FIGS. 10 and 11, a cooktop (1200) according to one embodiment may include a cooktop body (1210) and a ceramic glass (1220). The ceramic glass (1220) may be placed on the upper side of the cooktop body (1210). A cooktop (1200) according to one embodiment may include at least one of a heater (hereinafter, an induction heating coil (1211)), a circuit board (1212), or a coil mounting plate (1215). Here, the cooktop (1200) may be referred to as a cooking appliance.

[0124] According to one embodiment, the main body (1210) may form the exterior of the cooktop (1200). An induction heating coil (1211) may be housed inside the main body (1210). The induction heating coil (1211) may generate a magnetic field to induce heating of a cooking vessel (2) within the main body (1210). The induction heating coil (1211) may be electrically connected to a main board placed inside the main body (1210) via a wire (1211a).

[0125] According to one embodiment, the ceramic glass (1220) may include a first glass (1221) forming a first region (1221a) and a second glass (1222) forming a second region (1222a). The first glass (1221) and the second glass (1222) may be formed integrally. However, they are not limited thereto, and the first glass (1221) and the second glass (1222) may be formed by being joined by a separate joining device.

[0126] According to one embodiment, the first glass (1221) may include printed layers (1223a, 1223b, 1223c). The printed layers (1223a, 1223b, 1223c) located on the first glass (1221) may be coated at a position corresponding to an induction heating coil (1211) to guide a heating area. The shape of the printed layers (1223a, 1223b, 1223c) is not limited to that illustrated.

[0127] According to one embodiment, the second glass (1222) may include an input portion (1224). The input portion (1224) may be located within the second region (1222a) of the ceramic glass (1220), but is not limited thereto. The input portion (1224) may be formed at a location corresponding to the touch portion (1214). The input portion (1224) may be formed to overlap vertically with the touch portion (1214). The user can control the current flowing through the induction heating coil (1211) through the input portion (1224). For example, the user can determine the degree to which the cooking container (2) is heated through the input portion (1224).

[0128] According to one embodiment, the circuit board (1212) may be placed on the lower part of the second glass (1222).

[0129] According to one embodiment, the cooktop (1200) may include a display device (1213). The display device (1213) may be placed in a second area (1222a), but is not limited thereto. The display device (1213) may be electrically connected to a circuit board (1212). The display device (1213) may be placed in a through-hole formed in the second area (1222a) through which ceramic glass (1220) is formed. For example, the display device (1213) may indicate whether the cooking vessel (2) is being heated by an induction heating coil (1211). A user may check whether the cooking vessel (2) is being heated through the display device (1213). For example, the display device (1213) may display visual information such as characters, numbers, images, or videos.

[0130] According to one embodiment, the cooktop (1200) may include a touch portion (1214). The touch portion (1214) may be placed in a second area (1222a), but is not limited thereto. The touch portion (1214) may be electrically connected to a circuit board (1212). The touch portion (1214) may receive a touch signal. For example, the touch portion (1214) may receive input using a capacitive touch method. However, it is not limited thereto, and the touch portion (1214) may also receive input using a pressure-sensitive touch method. The user can control the current flowing through the induction heating coil (1211) through the touch portion (1214) and determine the degree to which the cooking vessel (2) is heated.

[0131] According to one embodiment, an induction heating coil (1211) may be seated on a coil mounting plate (1215). The coil mounting plate (1215) may be accommodated within a cooktop body (1210). A coil mounting hole (1215a) for seating the induction heating coil (1211) may be provided on the coil mounting plate (1215). A plurality of coil mounting grooves (1215a) may be provided.

[0132] According to one embodiment, the cooktop body (1210) may include a first frame (1216) positioned to support a ceramic glass (1220). The first frame (1216) may be provided to support the ceramic glass (1220) on its upper side. The first frame (1216) may be formed by extending upward from the four ends of the coil mounting plate (1215). The first frame (1216) may be positioned to wrap around the edges of the coil mounting plate (1215). The first frame (1216) may be positioned so that the ceramic glass (1220) can be seated and supported on the cooktop body (1210).

[0133] FIG. 12 is a schematic cross-sectional view of a ceramic glass according to one embodiment.

[0134] All features, components, and / or arrangement relationships between components illustrated in FIG. 12 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in other figures of this specification. Likewise, all features, components, and / or arrangement relationships between components described in relation to FIG. 1 through 11 may be included, either alone or in combination with, the features, components, and arrangement relationships between components described in FIG. 12.

[0135] In FIG. 12, the sizes of the micro-groove (1225) and the embossed portion (1226) may be depicted as slightly exaggerated for convenience of explanation. FIG. 12 is an exemplary representation for convenience of explanation, and the depicted cross-sectional shape does not limit the scope of the present disclosure.

[0136] Referring to FIG. 12, a ceramic glass (1220) according to one embodiment may include an upper surface (1220a), a lower surface (1220b), and a side surface (1220c). The upper surface (1220a) may be a surface that is exposed to the outside when the ceramic glass (1220) is mounted on a cooktop (e.g., the cooktop (1200) of FIG. 10). The lower surface (1220b) is a side opposite to the upper surface (1220b) and may be a surface that faces the inside of the main body (e.g., the main body (1210) of FIG. 10) when mounted on the cooktop (1200). The side surface (1220c) may be a surface connecting the upper surface (1220a) and the lower surface (1220b). The side surface (1220c) may extend in a vertical direction from the edge of the upper surface (1220a). The side (1220c) can be extended in a vertical direction from the corner of the bottom (1220b).

[0137] According to one embodiment, the ceramic glass (1220) may be composed of a transparent material, a translucent material, or an opaque material. For example, the ceramic glass (1220) may be black ceramic glass. For example, the ceramic glass (1220) may be transparent ceramic glass. For example, the ceramic glass (1220) may be white opaque ceramic glass. For example, the ceramic glass (1220) may have a color that is approximately white itself.

[0138] According to one embodiment, the ceramic glass (1220) may include an upper printing layer. The upper printing layer may include at least one of a UX printing layer and a UI printing layer. The upper printing layer may be located on the upper surface (1220a). It may be formed to indicate the center of the burner on the upper surface. The upper printing layer may be formed in a straight line or a cross shape to indicate the center of the burner, but is not limited thereto. Here, the upper printing layer may form the printing layer of FIG. 10 (e.g., the printing layer of FIG. 10 (1223a, 1223b, 1223c)) or an input part (e.g., the input part of FIG. 10 (1224)).

[0139] According to one embodiment, the ceramic glass (1220) may include a plurality of micro-grooves (1225) or a plurality of embossed portions (1226). The plurality of micro-grooves (1225) and the plurality of embossed portions (1226) may be formed on the upper surface (1220a) of the ceramic glass (1220). For example, the upper surface (1220a) of the ceramic glass (1220) may be composed of a plurality of micro-grooves (1225) and a plurality of embossed portions (1226). The plurality of micro-grooves (1225) and the plurality of embossed portions (1226) may be formed through a blasting process, a chemical etching process, and a polishing process.

[0140] According to one embodiment, a plurality of micro-grooves (1225) may be formed between a plurality of embossed portions (1226). The plurality of micro-grooves (1225) may be formed by a blasting process and an etching process. Here, the micro-grooves (1225) may be referred to as grooves, micro-dimples, indented portions, or concave portions.

[0141] According to one embodiment, a plurality of micro-grooves (1225) may have a depth (D1) of an average of 30 μm or less. Each of the plurality of micro-grooves (1225) may have a different depth. Here, the depth (D1) of the micro-grooves (1225) may be measured based on the top of the embossed portion (1226) adjacent to the micro-grooves (1225) and the bottom of the micro-grooves (1225). For example, the depth (D1) of the plurality of micro-grooves (1225) may refer to the average depth of all micro-grooves (1225) in the entire area of ​​the upper surface (1220a) of the ceramic glass (1220). For example, the depth (D1) of the plurality of micro-grooves (1225) may refer to the average depth of 10 to 20 micro-grooves (1225) arbitrarily selected for each area, by dividing the upper surface (1220a) of the ceramic glass (1220) into a plurality of virtual areas. However, the method of measuring the average depth (D1) of multiple micro-grooves (1225) is not limited to this.

[0142] As the average depth (D1) of the multiple micro-grooves (1225) increases, the cleanability (or ease of cleaning) of the ceramic glass (1220) may decrease. If foreign matter enters the deeply formed micro-grooves, it may be difficult for the user to easily remove the foreign matter by cleaning. The average depth (D1) of the micro-grooves (1225) formed in the ceramic glass (1220) of the present disclosure is 30 μm or less, which can improve cleanability.

[0143] According to one embodiment, the average width (W1) of the plurality of micro-grooves (1225) may be 100 μm or more. Each of the plurality of micro-grooves (1225) may have a different width. Here, the width (W1) of the micro-grooves (1225) may refer to the distance between neighboring embossed portions (1226) that are in contact with the micro-grooves (1225). For example, the width (W1) of the plurality of micro-grooves (1225) may refer to the average width of all micro-grooves (1225) in the entire area of ​​the upper surface (1220a) of the ceramic glass (1220). For example, the width (W1) of the plurality of micro-grooves (1225) may refer to the average width of 10 to 20 micro-grooves (1225) arbitrarily selected for each area, by dividing the upper surface (1220a) of the ceramic glass (1220) into a plurality of virtual areas. However, the method of measuring the average width (W1) of multiple micro-grooves (1225) is not limited to this.

[0144] As the average width (W1) of the multiple micro-grooves (1225) becomes narrower, the cleanability of the ceramic glass (1220) may decrease. If foreign matter enters the narrow micro-grooves, it is difficult to remove the foreign matter from the micro-grooves. The average width (W1) of the micro-grooves (1225) formed in the ceramic glass (1220) of the present disclosure is 100 μm or more, thereby improving cleanability.

[0145] According to one embodiment, a plurality of embossed portions (1226) may be formed to protrude upward between a plurality of micro-grooves (1225). Here, the embossed portions (1226) may be referred to as embossing, raised portions, or protrusions.

[0146] The size of the multiple embossed portions (1226) is related to scratch resistance. The larger the area of ​​the embossed portions (1226), the greater the resistance of the ceramic glass (1220) to scratches. As the area of ​​the embossed portions (1226) increases, the area of ​​the micro-grooves (1225) becomes relatively smaller, which may reduce cleaning ability.

[0147] A ceramic glass (1220) according to one embodiment may have a size range of embossed portions (1226) to optimize cleanability and scratch resistance.

[0148] According to one embodiment, a plurality of embossed portions (1226) may have an average width (W2) of 80 μm to 130 μm. Each of the plurality of embossed portions (1226) may have a different width. Here, the width (W2) of the embossed portion (1226) may refer to the diameter of the embossed portion (1226). For example, the width (W2) of the plurality of embossed portions (1226) may refer to the average width of all embossed portions (1226) in the entire upper surface (1220a) of the ceramic glass (1220). For example, the width (W2) of the plurality of embossed portions (1226) may refer to the average width of 10 to 20 embossed portions (1226) arbitrarily selected for each area, by dividing the upper surface (1220a) of the ceramic glass (1220) into a plurality of virtual areas. However, the method of measuring the average width (W2) of multiple embossed portions (1226) is not limited to this.

[0149] According to one embodiment, the upper surface (1220a) of the ceramic glass (1220) may be coated with a coating material. A coating layer may be formed on the upper surface (1220a) of the ceramic glass (1220) to improve antifouling properties, heat resistance, and cleanability.

[0150] According to one embodiment, the ceramic glass (1220) may further include a contamination-resistant coating layer (1230). The contamination-resistant coating layer (1230) may be coated on at least one of the top surface (1220a), side surface (1220c), and bottom surface (1220b) of the ceramic glass (1220). For example, the contamination-resistant coating layer (1230) may be coated only on the top surface (1220a) of the ceramic glass (1220).

[0151] According to one embodiment, the contamination-resistant coating layer (1230) may comprise siloxane imide and SiO2 powder. The SiO2 powder may be surface-modified with methyl groups. The particle size of the SiO2 powder may be 300 nm to 500 nm. The SiO2 powder may be a nano powder. The contamination-resistant coating layer (1230) may also be referred to as an anti-contamination coating layer.

[0152] According to one embodiment, a contamination-resistant coating layer (1230) can be formed by applying the anti-contamination coating liquid described in FIG. 6 onto the surface of a ceramic glass (1220) and then heating it.

[0153] According to one embodiment, at least 80 wt% of the material in the contamination-resistant coating layer (1230) relative to the total weight of the contamination-resistant coating layer (1230) may be configured to include Si-O bonds. The contamination-resistant coating layer (1230) may have heat resistance of 350 degrees Celsius or higher without containing fluorine (F). The contamination-resistant coating layer (1230) may be formed using the contamination-resistant coating solution shown in FIG. 6.

[0154] According to one embodiment, the thickness of the contamination-resistant coating layer (1230) may be 1 μm to 10 μm. By configuring the thickness of the contamination-resistant coating layer (1230) to be thin, the color of the ceramic glass (1220) can be maintained even after the contamination-resistant coating layer (1230) is coated.

[0155] An oven (1) according to one embodiment may include a cooking chamber (20) including a bottom surface and a wall surface, a door (30) arranged to open and close the cooking chamber (20), a heater (130) arranged to supply heat inside the cooking chamber (20), and a contamination-resistant coating layer (430) coated on the wall surface of the cooking chamber (20) and the inner surface of the door (30). The contamination-resistant coating layer (430) comprises siloxane imide and SiO2 powder, and the SiO2 powder may be surface-modified with methyl groups.

[0156] According to one embodiment, the contamination-resistant coating layer (430) may be configured such that at least 80 wt% of the material relative to the total weight of the contamination-resistant coating layer (430) contains Si-O bonds.

[0157] According to one embodiment, the particle size of the SiO2 powder may be 300 nm to 500 nm.

[0158] According to one embodiment, the contamination-resistant coating layer (430) can be formed by applying a contamination-resistant coating liquid to the wall surface of the cooking chamber (20) and the inner surface of the door (30) and then heating it.

[0159] According to one embodiment, the contamination-resistant coating solution may comprise 12 wt% to 29 wt% of siloxane amide, 10 wt% to 15 wt% of SiO2 powder, and 25 wt% to 30 wt% of methyl-functional silane based on the total weight of the contamination-resistant coating solution.

[0160] According to one embodiment, the contamination-resistant coating solution may comprise 35 wt% to 40 wt% of alcohol and 1 wt% to 3 wt% of an ammonia or amine-based alkali solution with a pH of 11 or higher, based on the total weight of the contamination-resistant coating solution.

[0161] According to one embodiment, the oven (1) may further include a hydrophilic coating layer coated on the bottom surface of the cooking chamber (20).

[0162] According to one embodiment, the surface roughness of the contamination-resistant coating layer (430) may be RMS 100 nm to 500 nm.

[0163] According to one embodiment, the oven (1) may further include a fan (140) arranged to circulate air inside the cooking chamber (20) and a cover case (110) that covers the fan (140) and is arranged on the wall of the cooking chamber (20).

[0164] According to one embodiment, the contamination-resistant coating layer (430) may be configured to be coated on the surface of the cover case (110).

[0165] A contamination-resistant coating solution according to one embodiment may comprise 12 wt% to 29 wt% of siloxane amide, 10 wt% to 15 wt% of SiO2 powder, and 25 wt% to 30 wt% of methyl-functional silane.

[0166] According to one embodiment, the contamination-resistant coating solution may comprise 35 wt% to 40 wt% of alcohol and 1 wt% to 3 wt% of an ammonia or amine-based alkali solution with a pH of 11 or higher.

[0167] According to one embodiment, the methyl functional silane may include at least one of methyltrimethoxysilane (MTMS), methyltriethoxysilane (MTES), dimethyldimethoxysilane (DMDMS), dimethyldiethoxysilane (DMDES), dimethyldichlorosilane (DMDCS), or methyltrichlorosilane (MTCS).

[0168] According to one embodiment, the alcohol may include at least one of methanol, ethanol, n-butanol, n-propanol, isobutanol, tert-butanol, pentanol, or isopropyl alcohol.

[0169] According to one embodiment, the ammonia or amine-based alkali solution may comprise at least one of ammonia water, ammonium chloride, triethylamine, monoethanolamine (MEA), diethylamine, ethylenediamine, or ammonium acetate.

[0170] According to one embodiment, the siloxane amide can undergo imide conversion through a drying and curing process to have heat resistance of 450 degrees or higher.

[0171] A cooktop (1200) according to one embodiment may include a cooktop body (1210), a ceramic glass (1220) disposed on the upper part of the cooktop body (1210), and a contamination-resistant coating layer (1230) coated on the upper surface of the ceramic glass (1220). The contamination-resistant coating layer (1230) comprises siloxane imide and SiO2 powder, and the SiO2 powder may be surface-modified with methyl groups.

[0172] According to one embodiment, the contamination-resistant coating layer (1230) may be configured such that at least 80 wt% of the material relative to the total weight of the contamination-resistant coating layer (1230) contains Si-O bonds. According to one embodiment, the particle size of the SiO2 powder may be 300 nm to 500 nm.

[0173] According to one embodiment, the contamination-resistant coating layer (1230) may be formed by applying a contamination-resistant coating solution to one surface of the ceramic glass (1220) and then heating it. The contamination-resistant coating solution may comprise 12 wt% to 29 wt% of siloxane amide, 10 wt% to 15 wt% of SiO2 powder, 25 wt% to 30 wt% of methyl-functional silane, 35 wt% to 40 wt% of alcohol, and 1 wt% to 3 wt% of an ammonia or amine-based alkali solution with a pH of 11 or higher, based on the total weight of the contamination-resistant coating solution.

[0174] The terms used in this disclosure are used merely to describe specific embodiments and are not intended to limit this disclosure. For example, a component expressed in the singular should be understood as a concept including a plural component unless the context clearly implies only the singular. Each of the phrases used in this disclosure, such as “A or B,” “at least one of A and B,” “at least one of A or B,” “A, B or C,” “at least one of A, B and C,” and “at least one of A, B, or C,” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof. It should be understood that the term “and / or” used in this disclosure encompasses any possible combination of one or more of the listed items. Terms such as “comprising,” “having,” and “consisting of” used in this disclosure are intended merely to specify the existence of the features, components, parts, or combinations thereof described in this disclosure, and the use of such terms is not intended to exclude the existence or addition of one or more other features, components, parts, or combinations thereof. Expressions such as “first,” “second,” used in this disclosure may modify various components regardless of order and / or importance, and are used only to distinguish one component from another and do not limit said components.

[0175] The expression “configured to” as used in this disclosure may be appropriately substituted depending on the context, for example, with “suitable for,” “capable of,” “designed to,” “modified to,” “made to,” or “capable of.” The term “configured to” may not necessarily mean only that which is “specially designed” in hardware. Instead, in some situations, the expression “device configured to” may mean that the device is “capable of” together with other devices or components. For example, the phrase “device configured (or set) to perform A, B, and C” may mean a device dedicated to performing the said operation, or a general-purpose device capable of performing various operations including said operation.

[0176] Meanwhile, terms such as “upper side,” “lower side,” and “front-rear direction” used in this disclosure are defined based on the drawings, and the shape and position of each component are not limited by these terms.

[0177] Although the foregoing description in this disclosure has focused on specific embodiments, this disclosure is not limited to such specific embodiments and should be understood to encompass all various modifications, equivalents, and / or substitutions of various embodiments.

Claims

1. Regarding the oven, A kitchen (20) including a floor and walls; A door (30) arranged to open and close the above cooking chamber (20); A heater (130) positioned to supply heat inside the cooking chamber (20); and It includes a contamination-resistant coating layer (430) coated on the wall surface of the above-mentioned cooking chamber (20) and the inner surface of the above-mentioned door (30), and The above contamination-resistant coating layer (430) is, Comprising siloxane imide and SiO2 powder, wherein the SiO2 powder is surface-modified with methyl groups, oven.

2. In Paragraph 1, The above contamination-resistant coating layer (430) is, The above contamination-resistant coating layer (430) is configured such that at least 80 wt% of the material relative to the total weight includes Si-O bonds. oven.

3. In Paragraph 1 or 2, The particle size of the above SiO2 powder is 300 nm to 500 nm, oven.

4. In any one of paragraphs 1 through 3, The above contamination-resistant coating layer (430) is formed by applying a contamination-resistant coating liquid to the wall surface of the cooking chamber (20) and the inner surface of the door (30) and then heating it. oven.

5. In Paragraph 4, The above contamination-resistant coating liquid is, A composition comprising 12 wt% to 29 wt% of siloxane amide, 10 wt% to 15 wt% of SiO2 powder, and 25 wt% to 30 wt% of methyl-functional silane based on the total weight of the contamination-resistant coating solution. oven.

6. In Paragraph 4 or 5, The above contamination-resistant coating liquid is, Comprising 35 wt% to 40 wt% of alcohol and 1 wt% to 3 wt% of an ammonia or amine-based alkali solution with a pH of 11 or higher, based on the total weight of the above contamination-resistant coating solution, oven.

7. In any one of paragraphs 1 through 6, A hydrophilic coating layer further comprising a bottom surface coated on the above cooking chamber (20), oven.

8. In any one of paragraphs 1 through 7, The surface roughness of the contamination-resistant coating layer (430) is RMS 100 nm to 500 nm, oven.

9. In any one of paragraphs 1 through 8, A fan (140) arranged to circulate air inside the cooking chamber (20); and A cover case (110) that covers the above-mentioned fan (140) and is positioned on the wall of the above-mentioned cooking chamber (20) is further included. oven.

10. In Paragraph 9, The above contamination-resistant coating layer (430) is, configured to be coated on the surface of the above cover case (110), oven.

11. Regarding the cooktop, Cooktop body (1210); Ceramic glass (1220) disposed on the upper part of the above-mentioned cooktop body (1210); and It includes a contamination-resistant coating layer (1230) coated on the upper surface of the ceramic glass (1220), and The above contamination-resistant coating layer (1230) is, Comprising siloxane imide and SiO2 powder, wherein the SiO2 powder is surface-modified with methyl groups, Cooktop 12. In Paragraph 11, The above contamination-resistant coating layer (1230) is, A cooktop configured such that at least 80 wt% of the material relative to the total weight of the contamination-resistant coating layer (1230) contains Si-O bonds.

13. In Paragraph 11 or 12, The particle size of the above SiO2 powder is 300 nm to 500 nm, Cooktop 14. In any one of paragraphs 11 through 13, The above contamination-resistant coating layer (1230) is formed by applying a contamination-resistant coating liquid to one surface of the ceramic glass (1220) and then heating it, and The above contamination-resistant coating liquid is, A composition comprising, based on the total weight of the above-mentioned contamination-resistant coating solution, 12 wt% to 29 wt% of siloxane amide, 10 wt% to 15 wt% of SiO2 powder, 25 wt% to 30 wt% of methyl-functional silane, 35 wt% to 40 wt% of alcohol, and 1 wt% to 3 wt% of an ammonia or amine-based alkali solution with a pH of 11 or higher. Cooktop

Images